From c47c5682a290cce9ce2f46269e61b374325e58de Mon Sep 17 00:00:00 2001 From: illuzen Date: Thu, 28 May 2026 15:44:37 +0900 Subject: [PATCH 01/26] vendor litep2p --- Cargo.lock | 610 ++- Cargo.toml | 2 + client/litep2p/Cargo.toml | 82 + client/litep2p/build.rs | 21 + client/litep2p/src/addresses.rs | 159 + client/litep2p/src/bandwidth.rs | 90 + client/litep2p/src/codec/identity.rs | 135 + client/litep2p/src/codec/mod.rs | 37 + client/litep2p/src/codec/unsigned_varint.rs | 141 + client/litep2p/src/config.rs | 388 ++ client/litep2p/src/crypto/ed25519.rs | 268 ++ client/litep2p/src/crypto/mod.rs | 147 + client/litep2p/src/crypto/noise/mod.rs | 1154 +++++ client/litep2p/src/crypto/noise/protocol.rs | 124 + .../litep2p/src/crypto/noise/x25519_spec.rs | 117 + client/litep2p/src/crypto/rsa.rs | 44 + client/litep2p/src/crypto/tls/certificate.rs | 534 +++ client/litep2p/src/crypto/tls/mod.rs | 76 + .../src/crypto/tls/test_assets/ed25519.der | Bin 0 -> 324 bytes .../src/crypto/tls/test_assets/ed448.der | Bin 0 -> 400 bytes .../litep2p/src/crypto/tls/test_assets/gen.sh | 63 + .../tls/test_assets/nistp256_sha256.der | Bin 0 -> 388 bytes .../tls/test_assets/nistp384_sha256.der | Bin 0 -> 450 bytes .../tls/test_assets/nistp384_sha384.der | Bin 0 -> 450 bytes .../tls/test_assets/nistp521_sha512.der | Bin 0 -> 525 bytes .../src/crypto/tls/test_assets/openssl.cfg | 6 + .../crypto/tls/test_assets/pkcs1_sha256.der | Bin 0 -> 324 bytes .../tls/test_assets/rsa_pkcs1_sha256.der | Bin 0 -> 785 bytes .../tls/test_assets/rsa_pkcs1_sha384.der | Bin 0 -> 785 bytes .../tls/test_assets/rsa_pkcs1_sha512.der | Bin 0 -> 785 bytes .../crypto/tls/test_assets/rsa_pss_sha384.der | Bin 0 -> 878 bytes client/litep2p/src/crypto/tls/tests/smoke.rs | 73 + client/litep2p/src/crypto/tls/verifier.rs | 256 ++ client/litep2p/src/error.rs | 559 +++ client/litep2p/src/executor.rs | 72 + client/litep2p/src/lib.rs | 681 +++ client/litep2p/src/mock/mod.rs | 21 + client/litep2p/src/mock/substream.rs | 162 + .../src/multistream_select/dialer_select.rs | 919 ++++ .../multistream_select/length_delimited.rs | 378 ++ .../src/multistream_select/listener_select.rs | 555 +++ client/litep2p/src/multistream_select/mod.rs | 199 + .../src/multistream_select/negotiated.rs | 375 ++ .../src/multistream_select/protocol.rs | 544 +++ .../multistream_select/tests/dialer_select.rs | 178 + .../src/multistream_select/tests/transport.rs | 108 + client/litep2p/src/peer_id.rs | 354 ++ client/litep2p/src/protocol/connection.rs | 275 ++ .../src/protocol/libp2p/bitswap/config.rs | 73 + .../src/protocol/libp2p/bitswap/handle.rs | 143 + .../src/protocol/libp2p/bitswap/mod.rs | 819 ++++ .../litep2p/src/protocol/libp2p/identify.rs | 525 +++ .../src/protocol/libp2p/kademlia/bucket.rs | 191 + .../src/protocol/libp2p/kademlia/config.rs | 344 ++ .../src/protocol/libp2p/kademlia/executor.rs | 558 +++ .../src/protocol/libp2p/kademlia/handle.rs | 511 +++ .../src/protocol/libp2p/kademlia/message.rs | 439 ++ .../src/protocol/libp2p/kademlia/mod.rs | 1648 +++++++ .../libp2p/kademlia/query/find_many_nodes.rs | 70 + .../libp2p/kademlia/query/find_node.rs | 717 +++ .../libp2p/kademlia/query/get_providers.rs | 528 +++ .../libp2p/kademlia/query/get_record.rs | 613 +++ .../src/protocol/libp2p/kademlia/query/mod.rs | 2145 +++++++++ .../libp2p/kademlia/query/put_record.rs | 130 + .../libp2p/kademlia/query/target_peers.rs | 149 + .../src/protocol/libp2p/kademlia/record.rs | 185 + .../protocol/libp2p/kademlia/routing_table.rs | 589 +++ .../src/protocol/libp2p/kademlia/store.rs | 1112 +++++ .../src/protocol/libp2p/kademlia/types.rs | 341 ++ client/litep2p/src/protocol/libp2p/mod.rs | 26 + .../src/protocol/libp2p/ping/config.rs | 144 + .../litep2p/src/protocol/libp2p/ping/mod.rs | 289 ++ .../src/protocol/libp2p/schema/bitswap.proto | 46 + .../src/protocol/libp2p/schema/identify.proto | 12 + .../src/protocol/libp2p/schema/kademlia.proto | 90 + client/litep2p/src/protocol/mdns.rs | 463 ++ client/litep2p/src/protocol/mod.rs | 143 + .../src/protocol/notification/config.rs | 257 ++ .../src/protocol/notification/connection.rs | 271 ++ .../src/protocol/notification/handle.rs | 523 +++ .../litep2p/src/protocol/notification/mod.rs | 1847 ++++++++ .../src/protocol/notification/negotiation.rs | 454 ++ .../src/protocol/notification/tests/mod.rs | 91 + .../notification/tests/notification.rs | 1141 +++++ .../tests/substream_validation.rs | 467 ++ .../src/protocol/notification/types.rs | 225 + client/litep2p/src/protocol/protocol_set.rs | 651 +++ .../src/protocol/request_response/config.rs | 171 + .../src/protocol/request_response/handle.rs | 570 +++ .../src/protocol/request_response/mod.rs | 1083 +++++ .../src/protocol/request_response/tests.rs | 301 ++ .../litep2p/src/protocol/transport_service.rs | 1723 ++++++++ client/litep2p/src/schema/keys.proto | 20 + client/litep2p/src/schema/noise.proto | 26 + client/litep2p/src/schema/webrtc.proto | 24 + client/litep2p/src/substream/mod.rs | 1089 +++++ .../litep2p/src/transport/common/listener.rs | 753 ++++ client/litep2p/src/transport/common/mod.rs | 23 + client/litep2p/src/transport/dummy.rs | 165 + .../litep2p/src/transport/manager/address.rs | 651 +++ .../litep2p/src/transport/manager/handle.rs | 875 ++++ .../litep2p/src/transport/manager/limits.rs | 227 + client/litep2p/src/transport/manager/mod.rs | 3838 +++++++++++++++++ .../src/transport/manager/peer_state.rs | 946 ++++ client/litep2p/src/transport/manager/types.rs | 59 + client/litep2p/src/transport/mod.rs | 237 + client/litep2p/src/transport/quic/config.rs | 58 + .../litep2p/src/transport/quic/connection.rs | 409 ++ client/litep2p/src/transport/quic/listener.rs | 428 ++ client/litep2p/src/transport/quic/mod.rs | 703 +++ .../litep2p/src/transport/quic/substream.rs | 174 + .../litep2p/src/transport/s2n-quic/config.rs | 30 + .../src/transport/s2n-quic/connection.rs | 743 ++++ client/litep2p/src/transport/s2n-quic/mod.rs | 593 +++ client/litep2p/src/transport/tcp/config.rs | 109 + .../litep2p/src/transport/tcp/connection.rs | 1456 +++++++ client/litep2p/src/transport/tcp/mod.rs | 1077 +++++ client/litep2p/src/transport/tcp/substream.rs | 126 + client/litep2p/src/transport/webrtc/config.rs | 46 + .../src/transport/webrtc/connection.rs | 867 ++++ client/litep2p/src/transport/webrtc/mod.rs | 821 ++++ .../litep2p/src/transport/webrtc/opening.rs | 500 +++ .../litep2p/src/transport/webrtc/substream.rs | 1510 +++++++ client/litep2p/src/transport/webrtc/util.rs | 148 + .../litep2p/src/transport/websocket/config.rs | 109 + .../src/transport/websocket/connection.rs | 1410 ++++++ client/litep2p/src/transport/websocket/mod.rs | 766 ++++ .../litep2p/src/transport/websocket/stream.rs | 226 + .../src/transport/websocket/substream.rs | 103 + client/litep2p/src/types.rs | 98 + client/litep2p/src/types/protocol.rs | 110 + client/litep2p/src/utils/futures_stream.rs | 86 + client/litep2p/src/utils/mod.rs | 21 + client/litep2p/src/yamux/control.rs | 264 ++ client/litep2p/src/yamux/mod.rs | 42 + 135 files changed, 54556 insertions(+), 135 deletions(-) create mode 100644 client/litep2p/Cargo.toml create mode 100644 client/litep2p/build.rs create mode 100644 client/litep2p/src/addresses.rs create mode 100644 client/litep2p/src/bandwidth.rs create mode 100644 client/litep2p/src/codec/identity.rs create mode 100644 client/litep2p/src/codec/mod.rs create mode 100644 client/litep2p/src/codec/unsigned_varint.rs create mode 100644 client/litep2p/src/config.rs create mode 100644 client/litep2p/src/crypto/ed25519.rs create mode 100644 client/litep2p/src/crypto/mod.rs create mode 100644 client/litep2p/src/crypto/noise/mod.rs create mode 100644 client/litep2p/src/crypto/noise/protocol.rs create mode 100644 client/litep2p/src/crypto/noise/x25519_spec.rs create mode 100644 client/litep2p/src/crypto/rsa.rs create mode 100644 client/litep2p/src/crypto/tls/certificate.rs create mode 100644 client/litep2p/src/crypto/tls/mod.rs create mode 100644 client/litep2p/src/crypto/tls/test_assets/ed25519.der create mode 100644 client/litep2p/src/crypto/tls/test_assets/ed448.der create mode 100644 client/litep2p/src/crypto/tls/test_assets/gen.sh create mode 100644 client/litep2p/src/crypto/tls/test_assets/nistp256_sha256.der create mode 100644 client/litep2p/src/crypto/tls/test_assets/nistp384_sha256.der create mode 100644 client/litep2p/src/crypto/tls/test_assets/nistp384_sha384.der create mode 100644 client/litep2p/src/crypto/tls/test_assets/nistp521_sha512.der create mode 100644 client/litep2p/src/crypto/tls/test_assets/openssl.cfg create mode 100644 client/litep2p/src/crypto/tls/test_assets/pkcs1_sha256.der create mode 100644 client/litep2p/src/crypto/tls/test_assets/rsa_pkcs1_sha256.der create mode 100644 client/litep2p/src/crypto/tls/test_assets/rsa_pkcs1_sha384.der create mode 100644 client/litep2p/src/crypto/tls/test_assets/rsa_pkcs1_sha512.der create mode 100644 client/litep2p/src/crypto/tls/test_assets/rsa_pss_sha384.der create mode 100644 client/litep2p/src/crypto/tls/tests/smoke.rs create mode 100644 client/litep2p/src/crypto/tls/verifier.rs create mode 100644 client/litep2p/src/error.rs create mode 100644 client/litep2p/src/executor.rs create mode 100644 client/litep2p/src/lib.rs create mode 100644 client/litep2p/src/mock/mod.rs create mode 100644 client/litep2p/src/mock/substream.rs create mode 100644 client/litep2p/src/multistream_select/dialer_select.rs create mode 100644 client/litep2p/src/multistream_select/length_delimited.rs create mode 100644 client/litep2p/src/multistream_select/listener_select.rs create mode 100644 client/litep2p/src/multistream_select/mod.rs create mode 100644 client/litep2p/src/multistream_select/negotiated.rs create mode 100644 client/litep2p/src/multistream_select/protocol.rs create mode 100644 client/litep2p/src/multistream_select/tests/dialer_select.rs create mode 100644 client/litep2p/src/multistream_select/tests/transport.rs create mode 100644 client/litep2p/src/peer_id.rs create mode 100644 client/litep2p/src/protocol/connection.rs create mode 100644 client/litep2p/src/protocol/libp2p/bitswap/config.rs create mode 100644 client/litep2p/src/protocol/libp2p/bitswap/handle.rs create mode 100644 client/litep2p/src/protocol/libp2p/bitswap/mod.rs create mode 100644 client/litep2p/src/protocol/libp2p/identify.rs create mode 100644 client/litep2p/src/protocol/libp2p/kademlia/bucket.rs create mode 100644 client/litep2p/src/protocol/libp2p/kademlia/config.rs create mode 100644 client/litep2p/src/protocol/libp2p/kademlia/executor.rs create mode 100644 client/litep2p/src/protocol/libp2p/kademlia/handle.rs create mode 100644 client/litep2p/src/protocol/libp2p/kademlia/message.rs create mode 100644 client/litep2p/src/protocol/libp2p/kademlia/mod.rs create mode 100644 client/litep2p/src/protocol/libp2p/kademlia/query/find_many_nodes.rs create mode 100644 client/litep2p/src/protocol/libp2p/kademlia/query/find_node.rs create mode 100644 client/litep2p/src/protocol/libp2p/kademlia/query/get_providers.rs create mode 100644 client/litep2p/src/protocol/libp2p/kademlia/query/get_record.rs create mode 100644 client/litep2p/src/protocol/libp2p/kademlia/query/mod.rs create mode 100644 client/litep2p/src/protocol/libp2p/kademlia/query/put_record.rs create mode 100644 client/litep2p/src/protocol/libp2p/kademlia/query/target_peers.rs create mode 100644 client/litep2p/src/protocol/libp2p/kademlia/record.rs create mode 100644 client/litep2p/src/protocol/libp2p/kademlia/routing_table.rs create mode 100644 client/litep2p/src/protocol/libp2p/kademlia/store.rs create mode 100644 client/litep2p/src/protocol/libp2p/kademlia/types.rs create mode 100644 client/litep2p/src/protocol/libp2p/mod.rs create mode 100644 client/litep2p/src/protocol/libp2p/ping/config.rs create mode 100644 client/litep2p/src/protocol/libp2p/ping/mod.rs create mode 100644 client/litep2p/src/protocol/libp2p/schema/bitswap.proto create mode 100644 client/litep2p/src/protocol/libp2p/schema/identify.proto create mode 100644 client/litep2p/src/protocol/libp2p/schema/kademlia.proto create mode 100644 client/litep2p/src/protocol/mdns.rs create mode 100644 client/litep2p/src/protocol/mod.rs create mode 100644 client/litep2p/src/protocol/notification/config.rs create mode 100644 client/litep2p/src/protocol/notification/connection.rs create mode 100644 client/litep2p/src/protocol/notification/handle.rs create mode 100644 client/litep2p/src/protocol/notification/mod.rs create mode 100644 client/litep2p/src/protocol/notification/negotiation.rs create mode 100644 client/litep2p/src/protocol/notification/tests/mod.rs create mode 100644 client/litep2p/src/protocol/notification/tests/notification.rs create mode 100644 client/litep2p/src/protocol/notification/tests/substream_validation.rs create mode 100644 client/litep2p/src/protocol/notification/types.rs create mode 100644 client/litep2p/src/protocol/protocol_set.rs create mode 100644 client/litep2p/src/protocol/request_response/config.rs create mode 100644 client/litep2p/src/protocol/request_response/handle.rs create mode 100644 client/litep2p/src/protocol/request_response/mod.rs create mode 100644 client/litep2p/src/protocol/request_response/tests.rs create mode 100644 client/litep2p/src/protocol/transport_service.rs create mode 100644 client/litep2p/src/schema/keys.proto create mode 100644 client/litep2p/src/schema/noise.proto create mode 100644 client/litep2p/src/schema/webrtc.proto create mode 100644 client/litep2p/src/substream/mod.rs create mode 100644 client/litep2p/src/transport/common/listener.rs create mode 100644 client/litep2p/src/transport/common/mod.rs create mode 100644 client/litep2p/src/transport/dummy.rs create mode 100644 client/litep2p/src/transport/manager/address.rs create mode 100644 client/litep2p/src/transport/manager/handle.rs create mode 100644 client/litep2p/src/transport/manager/limits.rs create mode 100644 client/litep2p/src/transport/manager/mod.rs create mode 100644 client/litep2p/src/transport/manager/peer_state.rs create mode 100644 client/litep2p/src/transport/manager/types.rs create mode 100644 client/litep2p/src/transport/mod.rs create mode 100644 client/litep2p/src/transport/quic/config.rs create mode 100644 client/litep2p/src/transport/quic/connection.rs create mode 100644 client/litep2p/src/transport/quic/listener.rs create mode 100644 client/litep2p/src/transport/quic/mod.rs create mode 100644 client/litep2p/src/transport/quic/substream.rs create mode 100644 client/litep2p/src/transport/s2n-quic/config.rs create mode 100644 client/litep2p/src/transport/s2n-quic/connection.rs create mode 100644 client/litep2p/src/transport/s2n-quic/mod.rs create mode 100644 client/litep2p/src/transport/tcp/config.rs create mode 100644 client/litep2p/src/transport/tcp/connection.rs create mode 100644 client/litep2p/src/transport/tcp/mod.rs create mode 100644 client/litep2p/src/transport/tcp/substream.rs create mode 100644 client/litep2p/src/transport/webrtc/config.rs create mode 100644 client/litep2p/src/transport/webrtc/connection.rs create mode 100644 client/litep2p/src/transport/webrtc/mod.rs create mode 100644 client/litep2p/src/transport/webrtc/opening.rs create mode 100644 client/litep2p/src/transport/webrtc/substream.rs create mode 100644 client/litep2p/src/transport/webrtc/util.rs create mode 100644 client/litep2p/src/transport/websocket/config.rs create mode 100644 client/litep2p/src/transport/websocket/connection.rs create mode 100644 client/litep2p/src/transport/websocket/mod.rs create mode 100644 client/litep2p/src/transport/websocket/stream.rs create mode 100644 client/litep2p/src/transport/websocket/substream.rs create mode 100644 client/litep2p/src/types.rs create mode 100644 client/litep2p/src/types/protocol.rs create mode 100644 client/litep2p/src/utils/futures_stream.rs create mode 100644 client/litep2p/src/utils/mod.rs create mode 100644 client/litep2p/src/yamux/control.rs create mode 100644 client/litep2p/src/yamux/mod.rs diff --git a/Cargo.lock b/Cargo.lock index 63ddf5b2..b48cbdbc 100644 --- a/Cargo.lock +++ b/Cargo.lock @@ -810,6 +810,29 @@ version = "1.5.0" source = "registry+https://github.com/rust-lang/crates.io-index" checksum = "c08606f8c3cbf4ce6ec8e28fb0014a2c086708fe954eaa885384a6165172e7e8" +[[package]] +name = "aws-lc-rs" +version = "1.17.0" +source = "registry+https://github.com/rust-lang/crates.io-index" +checksum = "5ec2f1fc3ec205783a5da9a7e6c1509cc69dedf09a1949e412c1e18469326d00" +dependencies = [ + "aws-lc-sys", + "untrusted 0.7.1", + "zeroize", +] + +[[package]] +name = "aws-lc-sys" +version = "0.41.0" +source = "registry+https://github.com/rust-lang/crates.io-index" +checksum = "1a2f9779ce85b93ab6170dd940ad0169b5766ff848247aff13bb788b832fe3f4" +dependencies = [ + "cc", + "cmake", + "dunce", + "fs_extra", +] + [[package]] name = "backtrace" version = "0.3.75" @@ -843,12 +866,6 @@ version = "0.2.0" source = "registry+https://github.com/rust-lang/crates.io-index" checksum = "6107fe1be6682a68940da878d9e9f5e90ca5745b3dec9fd1bb393c8777d4f581" -[[package]] -name = "base64" -version = "0.21.7" -source = "registry+https://github.com/rust-lang/crates.io-index" -checksum = "9d297deb1925b89f2ccc13d7635fa0714f12c87adce1c75356b39ca9b7178567" - [[package]] name = "base64" version = "0.22.1" @@ -926,7 +943,7 @@ version = "0.8.0" source = "registry+https://github.com/rust-lang/crates.io-index" checksum = "08807e080ed7f9d5433fa9b275196cfc35414f66a0c79d864dc51a0d825231a3" dependencies = [ - "bit-vec", + "bit-vec 0.8.0", ] [[package]] @@ -935,6 +952,15 @@ version = "0.8.0" source = "registry+https://github.com/rust-lang/crates.io-index" checksum = "5e764a1d40d510daf35e07be9eb06e75770908c27d411ee6c92109c9840eaaf7" +[[package]] +name = "bit-vec" +version = "0.9.1" +source = "registry+https://github.com/rust-lang/crates.io-index" +checksum = "b71798fca2c1fe1086445a7258a4bc81e6e49dcd24c8d0dd9a1e57395b603f51" +dependencies = [ + "serde", +] + [[package]] name = "bitcoin-internals" version = "0.2.0" @@ -1174,6 +1200,9 @@ name = "bytes" version = "1.11.1" source = "registry+https://github.com/rust-lang/crates.io-index" checksum = "1e748733b7cbc798e1434b6ac524f0c1ff2ab456fe201501e6497c8417a4fc33" +dependencies = [ + "serde", +] [[package]] name = "bzip2-sys" @@ -1235,9 +1264,9 @@ checksum = "37b2a672a2cb129a2e41c10b1224bb368f9f37a2b16b612598138befd7b37eb5" [[package]] name = "cc" -version = "1.2.38" +version = "1.2.62" source = "registry+https://github.com/rust-lang/crates.io-index" -checksum = "80f41ae168f955c12fb8960b057d70d0ca153fb83182b57d86380443527be7e9" +checksum = "a1dce859f0832a7d088c4f1119888ab94ef4b5d6795d1ce05afb7fe159d79f98" dependencies = [ "find-msvc-tools", "jobserver", @@ -1384,6 +1413,8 @@ dependencies = [ "core2", "multibase", "multihash 0.19.3", + "serde", + "serde_bytes", "unsigned-varint 0.8.0", ] @@ -1479,6 +1510,15 @@ dependencies = [ "zeroize", ] +[[package]] +name = "cmake" +version = "0.1.58" +source = "registry+https://github.com/rust-lang/crates.io-index" +checksum = "c0f78a02292a74a88ac736019ab962ece0bc380e3f977bf72e376c5d78ff0678" +dependencies = [ + "cc", +] + [[package]] name = "coarsetime" version = "0.1.36" @@ -1848,6 +1888,21 @@ version = "0.122.0" source = "registry+https://github.com/rust-lang/crates.io-index" checksum = "b530783809a55cb68d070e0de60cfbb3db0dc94c8850dd5725411422bedcf6bb" +[[package]] +name = "crc" +version = "3.4.0" +source = "registry+https://github.com/rust-lang/crates.io-index" +checksum = "5eb8a2a1cd12ab0d987a5d5e825195d372001a4094a0376319d5a0ad71c1ba0d" +dependencies = [ + "crc-catalog", +] + +[[package]] +name = "crc-catalog" +version = "2.5.0" +source = "registry+https://github.com/rust-lang/crates.io-index" +checksum = "217698eaf96b4a3f0bc4f3662aaa55bdf913cd54d7204591faa790070c6d0853" + [[package]] name = "crc32fast" version = "1.5.0" @@ -2901,6 +2956,18 @@ version = "0.3.0" source = "registry+https://github.com/rust-lang/crates.io-index" checksum = "2acce4a10f12dc2fb14a218589d4f1f62ef011b2d0cc4b3cb1bba8e94da14649" +[[package]] +name = "fastbloom" +version = "0.14.1" +source = "registry+https://github.com/rust-lang/crates.io-index" +checksum = "4e7f34442dbe69c60fe8eaf58a8cafff81a1f278816d8ab4db255b3bef4ac3c4" +dependencies = [ + "getrandom 0.3.3", + "libm", + "rand 0.9.2", + "siphasher 1.0.1", +] + [[package]] name = "fastrand" version = "2.3.0" @@ -2997,9 +3064,9 @@ dependencies = [ [[package]] name = "find-msvc-tools" -version = "0.1.2" +version = "0.1.9" source = "registry+https://github.com/rust-lang/crates.io-index" -checksum = "1ced73b1dacfc750a6db6c0a0c3a3853c8b41997e2e2c563dc90804ae6867959" +checksum = "5baebc0774151f905a1a2cc41989300b1e6fbb29aff0ceffa1064fdd3088d582" [[package]] name = "fixed-hash" @@ -3052,6 +3119,21 @@ version = "0.2.0" source = "registry+https://github.com/rust-lang/crates.io-index" checksum = "77ce24cb58228fbb8aa041425bb1050850ac19177686ea6e0f41a70416f56fdb" +[[package]] +name = "foreign-types" +version = "0.3.2" +source = "registry+https://github.com/rust-lang/crates.io-index" +checksum = "f6f339eb8adc052cd2ca78910fda869aefa38d22d5cb648e6485e4d3fc06f3b1" +dependencies = [ + "foreign-types-shared", +] + +[[package]] +name = "foreign-types-shared" +version = "0.1.1" +source = "registry+https://github.com/rust-lang/crates.io-index" +checksum = "00b0228411908ca8685dba7fc2cdd70ec9990a6e753e89b6ac91a84c40fbaf4b" + [[package]] name = "fork-tree" version = "13.0.1" @@ -3415,6 +3497,12 @@ dependencies = [ "winapi", ] +[[package]] +name = "fs_extra" +version = "1.3.0" +source = "registry+https://github.com/rust-lang/crates.io-index" +checksum = "42703706b716c37f96a77aea830392ad231f44c9e9a67872fa5548707e11b11c" + [[package]] name = "funty" version = "2.0.0" @@ -3558,6 +3646,18 @@ dependencies = [ "slab", ] +[[package]] +name = "futures_ringbuf" +version = "0.4.0" +source = "registry+https://github.com/rust-lang/crates.io-index" +checksum = "6628abb6eb1fc74beaeb20cd0670c43d158b0150f7689b38c3eaf663f99bdec7" +dependencies = [ + "futures 0.3.31", + "log", + "ringbuf", + "rustc_version", +] + [[package]] name = "fxhash" version = "0.2.1" @@ -3906,6 +4006,12 @@ version = "0.4.1" source = "registry+https://github.com/rust-lang/crates.io-index" checksum = "6fe2267d4ed49bc07b63801559be28c718ea06c4738b7a03c94df7386d2cde46" +[[package]] +name = "hex-literal" +version = "1.1.0" +source = "registry+https://github.com/rust-lang/crates.io-index" +checksum = "e712f64ec3850b98572bffac52e2c6f282b29fe6c5fa6d42334b30be438d95c1" + [[package]] name = "hickory-proto" version = "0.24.4" @@ -4172,7 +4278,7 @@ dependencies = [ "hyper-util", "log", "rustls 0.23.32", - "rustls-native-certs 0.8.1", + "rustls-native-certs", "rustls-pki-types", "tokio 1.47.1", "tokio-rustls", @@ -4732,14 +4838,14 @@ version = "0.24.10" source = "registry+https://github.com/rust-lang/crates.io-index" checksum = "cc4280b709ac3bb5e16cf3bad5056a0ec8df55fa89edfe996361219aadc2c7ea" dependencies = [ - "base64 0.22.1", + "base64", "futures-util", "http 1.3.1", "jsonrpsee-core", "pin-project", "rustls 0.23.32", "rustls-pki-types", - "rustls-platform-verifier", + "rustls-platform-verifier 0.5.3", "soketto", "thiserror 1.0.69", "tokio 1.47.1", @@ -5318,13 +5424,13 @@ dependencies = [ "futures-rustls", "libp2p-core", "libp2p-identity", - "rcgen", + "rcgen 0.11.3", "ring 0.17.14", "rustls 0.23.32", "rustls-webpki 0.101.7", "thiserror 1.0.69", "x509-parser 0.16.0", - "yasna", + "yasna 0.5.2", ] [[package]] @@ -5410,7 +5516,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index" checksum = "e79019718125edc905a079a70cfa5f3820bc76139fc91d6f9abc27ea2a887139" dependencies = [ "arrayref", - "base64 0.22.1", + "base64", "digest 0.9.0", "hmac-drbg", "libsecp256k1-core", @@ -5521,9 +5627,9 @@ checksum = "241eaef5fd12c88705a01fc1066c48c4b36e0dd4377dcdc7ec3942cea7a69956" [[package]] name = "litep2p" -version = "0.13.3" +version = "0.13.0" source = "registry+https://github.com/rust-lang/crates.io-index" -checksum = "cbf3924cf539a761465543592b34c4198d60db2cda16594769edd43451e5ab41" +checksum = "c68ba359d7f1a80d18821b46575d5ddb9a9a6672fe0669f5fc9e83cab9abd760" dependencies = [ "async-trait", "bs58", @@ -5535,7 +5641,6 @@ dependencies = [ "futures-timer", "hickory-resolver 0.25.2", "indexmap", - "ip_network", "libc", "mockall", "multiaddr 0.17.1", @@ -5565,7 +5670,7 @@ dependencies = [ "x25519-dalek", "x509-parser 0.17.0", "yamux 0.13.10", - "yasna", + "yasna 0.5.2", "zeroize", ] @@ -5709,11 +5814,11 @@ dependencies = [ [[package]] name = "matchers" -version = "0.1.0" +version = "0.2.0" source = "registry+https://github.com/rust-lang/crates.io-index" -checksum = "8263075bb86c5a1b1427b5ae862e8889656f126e9f77c484496e8b47cf5c5558" +checksum = "d1525a2a28c7f4fa0fc98bb91ae755d1e2d1505079e05539e35bc876b5d65ae9" dependencies = [ - "regex-automata 0.1.10", + "regex-automata", ] [[package]] @@ -5972,6 +6077,7 @@ dependencies = [ "core2", "digest 0.10.7", "multihash-derive", + "serde", "sha2 0.10.9", "sha3", "unsigned-varint 0.7.2", @@ -5984,6 +6090,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index" checksum = "6b430e7953c29dd6a09afc29ff0bb69c6e306329ee6794700aee27b76a1aea8d" dependencies = [ "core2", + "serde", "unsigned-varint 0.8.0", ] @@ -6198,12 +6305,11 @@ dependencies = [ [[package]] name = "nu-ansi-term" -version = "0.46.0" +version = "0.50.3" source = "registry+https://github.com/rust-lang/crates.io-index" -checksum = "77a8165726e8236064dbb45459242600304b42a5ea24ee2948e18e023bf7ba84" +checksum = "7957b9740744892f114936ab4a57b3f487491bbeafaf8083688b16841a4240e5" dependencies = [ - "overload", - "winapi", + "windows-sys 0.61.0", ] [[package]] @@ -6372,12 +6478,59 @@ version = "0.3.1" source = "registry+https://github.com/rust-lang/crates.io-index" checksum = "c08d65885ee38876c4f86fa503fb49d7b507c2b62552df7c70b2fce627e06381" +[[package]] +name = "openssl" +version = "0.10.80" +source = "registry+https://github.com/rust-lang/crates.io-index" +checksum = "a45fa2aa886c42762255da344f0a0d313e254066c46aad76f300c3d3da62d967" +dependencies = [ + "bitflags 2.9.4", + "cfg-if", + "foreign-types", + "libc", + "openssl-macros", + "openssl-sys", +] + +[[package]] +name = "openssl-macros" +version = "0.1.1" +source = "registry+https://github.com/rust-lang/crates.io-index" +checksum = "a948666b637a0f465e8564c73e89d4dde00d72d4d473cc972f390fc3dcee7d9c" +dependencies = [ + "proc-macro2", + "quote", + "syn 2.0.106", +] + [[package]] name = "openssl-probe" version = "0.1.6" source = "registry+https://github.com/rust-lang/crates.io-index" checksum = "d05e27ee213611ffe7d6348b942e8f942b37114c00cc03cec254295a4a17852e" +[[package]] +name = "openssl-src" +version = "300.6.0+3.6.2" +source = "registry+https://github.com/rust-lang/crates.io-index" +checksum = "a8e8cbfd3a4a8c8f089147fd7aaa33cf8c7450c4d09f8f80698a0cf093abeff4" +dependencies = [ + "cc", +] + +[[package]] +name = "openssl-sys" +version = "0.9.116" +source = "registry+https://github.com/rust-lang/crates.io-index" +checksum = "f28a22dc7140cda5f096e5e7724a6962ca81a7f8bfd2979f9b18c11af56318c4" +dependencies = [ + "cc", + "libc", + "openssl-src", + "pkg-config", + "vcpkg", +] + [[package]] name = "option-ext" version = "0.2.0" @@ -6417,12 +6570,6 @@ dependencies = [ "syn 1.0.109", ] -[[package]] -name = "overload" -version = "0.1.1" -source = "registry+https://github.com/rust-lang/crates.io-index" -checksum = "b15813163c1d831bf4a13c3610c05c0d03b39feb07f7e09fa234dac9b15aaf39" - [[package]] name = "p3-dft" version = "0.3.0" @@ -7099,7 +7246,7 @@ version = "3.0.5" source = "registry+https://github.com/rust-lang/crates.io-index" checksum = "38af38e8470ac9dee3ce1bae1af9c1671fffc44ddfd8bd1d0a3445bf349a8ef3" dependencies = [ - "base64 0.22.1", + "base64", "serde", ] @@ -7454,7 +7601,7 @@ checksum = "6a27f1d503aa4da18fdd9c97988624f14be87c38bfa036638babf748edc326fe" dependencies = [ "bitvec", "bounded-collections", - "hex-literal", + "hex-literal 0.4.1", "log", "parity-scale-codec", "polkadot-core-primitives", @@ -7950,14 +8097,14 @@ source = "registry+https://github.com/rust-lang/crates.io-index" checksum = "2bb0be07becd10686a0bb407298fb425360a5c44a663774406340c59a22de4ce" dependencies = [ "bit-set", - "bit-vec", + "bit-vec 0.8.0", "bitflags 2.9.4", "lazy_static", "num-traits", "rand 0.9.2", "rand_chacha 0.9.0", "rand_xorshift", - "regex-syntax 0.8.6", + "regex-syntax", "rusty-fork", "tempfile", "unarray", @@ -8152,6 +8299,65 @@ dependencies = [ name = "qp-high-security" version = "0.1.0" +[[package]] +name = "qp-litep2p" +version = "0.13.2" +dependencies = [ + "async-trait", + "bs58", + "bytes 1.11.1", + "cid 0.11.1", + "ed25519-dalek", + "enum-display", + "futures 0.3.31", + "futures-timer", + "futures_ringbuf", + "hex-literal 1.1.0", + "hickory-resolver 0.25.2", + "indexmap", + "ip_network", + "libc", + "mockall", + "multiaddr 0.17.1", + "multihash 0.17.0", + "network-interface", + "parking_lot 0.12.4", + "pin-project", + "prost 0.13.5", + "prost-build 0.14.3", + "quickcheck", + "quinn 0.9.4", + "rand 0.8.5", + "rcgen 0.14.8", + "ring 0.17.14", + "rustls 0.20.9", + "serde", + "serde_json", + "serde_millis", + "sha2 0.10.9", + "simple-dns", + "smallvec", + "snow", + "socket2 0.5.10", + "str0m", + "thiserror 2.0.18", + "tokio 1.47.1", + "tokio-stream", + "tokio-tungstenite", + "tokio-util", + "tracing", + "tracing-subscriber", + "uint 0.10.0", + "unsigned-varint 0.8.0", + "url", + "webpki", + "x25519-dalek", + "x509-parser 0.17.0", + "yamux 0.13.10", + "yasna 0.5.2", + "zeroize", +] + [[package]] name = "qp-plonky2" version = "1.4.1" @@ -8322,7 +8528,7 @@ dependencies = [ "bip39", "getrandom 0.2.17", "hex", - "hex-literal", + "hex-literal 0.4.1", "hmac 0.12.1", "qp-poseidon-core", "qp-rusty-crystals-dilithium", @@ -8512,10 +8718,12 @@ dependencies = [ "qpow-math", "quantus-miner-api", "quantus-runtime", - "quinn 0.10.2", + "quinn 0.11.9", "rand 0.8.5", - "rcgen", - "rustls 0.21.12", + "rcgen 0.14.8", + "rustls 0.23.32", + "rustls-pki-types", + "rustls-post-quantum", "sc-basic-authorship", "sc-cli", "sc-client-api", @@ -8531,6 +8739,7 @@ dependencies = [ "sc-transaction-pool-api", "serde", "serde_json", + "sha2 0.10.9", "sp-api", "sp-block-builder", "sp-blockchain", @@ -8654,19 +8863,20 @@ dependencies = [ [[package]] name = "quinn" -version = "0.10.2" +version = "0.9.4" source = "registry+https://github.com/rust-lang/crates.io-index" -checksum = "8cc2c5017e4b43d5995dcea317bc46c1e09404c0a9664d2908f7f02dfe943d75" +checksum = "2e8b432585672228923edbbf64b8b12c14e1112f62e88737655b4a083dbcd78e" dependencies = [ "bytes 1.11.1", "pin-project-lite 0.2.16", - "quinn-proto 0.10.6", - "quinn-udp 0.4.1", + "quinn-proto 0.9.6", + "quinn-udp 0.3.2", "rustc-hash 1.1.0", - "rustls 0.21.12", + "rustls 0.20.9", "thiserror 1.0.69", "tokio 1.47.1", "tracing", + "webpki", ] [[package]] @@ -8692,20 +8902,20 @@ dependencies = [ [[package]] name = "quinn-proto" -version = "0.10.6" +version = "0.9.6" source = "registry+https://github.com/rust-lang/crates.io-index" -checksum = "141bf7dfde2fbc246bfd3fe12f2455aa24b0fbd9af535d8c86c7bd1381ff2b1a" +checksum = "94b0b33c13a79f669c85defaf4c275dc86a0c0372807d0ca3d78e0bb87274863" dependencies = [ "bytes 1.11.1", "rand 0.8.5", "ring 0.16.20", "rustc-hash 1.1.0", - "rustls 0.21.12", - "rustls-native-certs 0.6.3", + "rustls 0.20.9", "slab", "thiserror 1.0.69", "tinyvec", "tracing", + "webpki", ] [[package]] @@ -8715,6 +8925,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index" checksum = "f1906b49b0c3bc04b5fe5d86a77925ae6524a19b816ae38ce1e426255f1d8a31" dependencies = [ "bytes 1.11.1", + "fastbloom", "getrandom 0.3.3", "lru-slab", "rand 0.9.2", @@ -8722,6 +8933,7 @@ dependencies = [ "rustc-hash 2.1.1", "rustls 0.23.32", "rustls-pki-types", + "rustls-platform-verifier 0.6.2", "slab", "thiserror 2.0.18", "tinyvec", @@ -8731,15 +8943,15 @@ dependencies = [ [[package]] name = "quinn-udp" -version = "0.4.1" +version = "0.3.2" source = "registry+https://github.com/rust-lang/crates.io-index" -checksum = "055b4e778e8feb9f93c4e439f71dc2156ef13360b432b799e179a8c4cdf0b1d7" +checksum = "641538578b21f5e5c8ea733b736895576d0fe329bb883b937db6f4d163dbaaf4" dependencies = [ - "bytes 1.11.1", "libc", - "socket2 0.5.10", + "quinn-proto 0.9.6", + "socket2 0.4.10", "tracing", - "windows-sys 0.48.0", + "windows-sys 0.42.0", ] [[package]] @@ -8930,7 +9142,22 @@ dependencies = [ "pem", "ring 0.16.20", "time", - "yasna", + "yasna 0.5.2", +] + +[[package]] +name = "rcgen" +version = "0.14.8" +source = "registry+https://github.com/rust-lang/crates.io-index" +checksum = "57f6d249aad744e274e682777a50283a225a32705394ee6d5fcc01efa25e4055" +dependencies = [ + "aws-lc-rs", + "pem", + "ring 0.17.14", + "rustls-pki-types", + "time", + "x509-parser 0.18.1", + "yasna 0.6.0", ] [[package]] @@ -9017,17 +9244,8 @@ checksum = "23d7fd106d8c02486a8d64e778353d1cffe08ce79ac2e82f540c86d0facf6912" dependencies = [ "aho-corasick", "memchr", - "regex-automata 0.4.10", - "regex-syntax 0.8.6", -] - -[[package]] -name = "regex-automata" -version = "0.1.10" -source = "registry+https://github.com/rust-lang/crates.io-index" -checksum = "6c230d73fb8d8c1b9c0b3135c5142a8acee3a0558fb8db5cf1cb65f8d7862132" -dependencies = [ - "regex-syntax 0.6.29", + "regex-automata", + "regex-syntax", ] [[package]] @@ -9038,15 +9256,9 @@ checksum = "6b9458fa0bfeeac22b5ca447c63aaf45f28439a709ccd244698632f9aa6394d6" dependencies = [ "aho-corasick", "memchr", - "regex-syntax 0.8.6", + "regex-syntax", ] -[[package]] -name = "regex-syntax" -version = "0.6.29" -source = "registry+https://github.com/rust-lang/crates.io-index" -checksum = "f162c6dd7b008981e4d40210aca20b4bd0f9b60ca9271061b07f78537722f2e1" - [[package]] name = "regex-syntax" version = "0.8.6" @@ -9098,6 +9310,15 @@ dependencies = [ "windows-sys 0.52.0", ] +[[package]] +name = "ringbuf" +version = "0.3.3" +source = "registry+https://github.com/rust-lang/crates.io-index" +checksum = "79abed428d1fd2a128201cec72c5f6938e2da607c6f3745f769fabea399d950a" +dependencies = [ + "crossbeam-utils", +] + [[package]] name = "ripemd" version = "0.1.3" @@ -9219,13 +9440,13 @@ dependencies = [ [[package]] name = "rustls" -version = "0.21.12" +version = "0.20.9" source = "registry+https://github.com/rust-lang/crates.io-index" -checksum = "3f56a14d1f48b391359b22f731fd4bd7e43c97f3c50eee276f3aa09c94784d3e" +checksum = "1b80e3dec595989ea8510028f30c408a4630db12c9cbb8de34203b89d6577e99" dependencies = [ - "ring 0.17.14", - "rustls-webpki 0.101.7", + "ring 0.16.20", "sct", + "webpki", ] [[package]] @@ -9234,6 +9455,7 @@ version = "0.23.32" source = "registry+https://github.com/rust-lang/crates.io-index" checksum = "cd3c25631629d034ce7cd9940adc9d45762d46de2b0f57193c4443b92c6d4d40" dependencies = [ + "aws-lc-rs", "log", "once_cell", "ring 0.17.14", @@ -9243,18 +9465,6 @@ dependencies = [ "zeroize", ] -[[package]] -name = "rustls-native-certs" -version = "0.6.3" -source = "registry+https://github.com/rust-lang/crates.io-index" -checksum = "a9aace74cb666635c918e9c12bc0d348266037aa8eb599b5cba565709a8dff00" -dependencies = [ - "openssl-probe", - "rustls-pemfile", - "schannel", - "security-framework 2.11.1", -] - [[package]] name = "rustls-native-certs" version = "0.8.1" @@ -9264,16 +9474,7 @@ dependencies = [ "openssl-probe", "rustls-pki-types", "schannel", - "security-framework 3.5.0", -] - -[[package]] -name = "rustls-pemfile" -version = "1.0.4" -source = "registry+https://github.com/rust-lang/crates.io-index" -checksum = "1c74cae0a4cf6ccbbf5f359f08efdf8ee7e1dc532573bf0db71968cb56b1448c" -dependencies = [ - "base64 0.21.7", + "security-framework", ] [[package]] @@ -9298,21 +9499,53 @@ dependencies = [ "log", "once_cell", "rustls 0.23.32", - "rustls-native-certs 0.8.1", + "rustls-native-certs", "rustls-platform-verifier-android", "rustls-webpki 0.103.6", - "security-framework 3.5.0", + "security-framework", "security-framework-sys", "webpki-root-certs 0.26.11", "windows-sys 0.59.0", ] +[[package]] +name = "rustls-platform-verifier" +version = "0.6.2" +source = "registry+https://github.com/rust-lang/crates.io-index" +checksum = "1d99feebc72bae7ab76ba994bb5e121b8d83d910ca40b36e0921f53becc41784" +dependencies = [ + "core-foundation 0.10.1", + "core-foundation-sys", + "jni", + "log", + "once_cell", + "rustls 0.23.32", + "rustls-native-certs", + "rustls-platform-verifier-android", + "rustls-webpki 0.103.6", + "security-framework", + "security-framework-sys", + "webpki-root-certs 1.0.2", + "windows-sys 0.61.0", +] + [[package]] name = "rustls-platform-verifier-android" version = "0.1.1" source = "registry+https://github.com/rust-lang/crates.io-index" checksum = "f87165f0995f63a9fbeea62b64d10b4d9d8e78ec6d7d51fb2125fda7bb36788f" +[[package]] +name = "rustls-post-quantum" +version = "0.2.4" +source = "registry+https://github.com/rust-lang/crates.io-index" +checksum = "0da3cd9229bac4fae1f589c8f875b3c891a058ddaa26eb3bde16b5e43dc174ce" +dependencies = [ + "aws-lc-rs", + "rustls 0.23.32", + "rustls-webpki 0.103.6", +] + [[package]] name = "rustls-webpki" version = "0.101.7" @@ -9329,6 +9562,7 @@ version = "0.103.6" source = "registry+https://github.com/rust-lang/crates.io-index" checksum = "8572f3c2cb9934231157b45499fc41e1f58c589fdfb81a844ba873265e80f8eb" dependencies = [ + "aws-lc-rs", "ring 0.17.14", "rustls-pki-types", "untrusted 0.9.0", @@ -10021,7 +10255,9 @@ dependencies = [ [[package]] name = "sc-network-types" -version = "0.20.3" +version = "0.20.1" +source = "registry+https://github.com/rust-lang/crates.io-index" +checksum = "11103f2e35999989326ed5be87f0a7d335269bef6d6a1c0ddd543a7d9aed7788" dependencies = [ "bs58", "bytes 1.11.1", @@ -10032,7 +10268,6 @@ dependencies = [ "log", "multiaddr 0.18.2", "multihash 0.19.3", - "quickcheck", "rand 0.8.5", "serde", "serde_with", @@ -10654,6 +10889,21 @@ dependencies = [ "untrusted 0.9.0", ] +[[package]] +name = "sctp-proto" +version = "0.5.0" +source = "registry+https://github.com/rust-lang/crates.io-index" +checksum = "423139d8cca3021b9d800f084a711ba2d23b508ae71b33dba167f11ca33e54c7" +dependencies = [ + "bytes 1.11.1", + "crc", + "log", + "rand 0.9.2", + "rustc-hash 2.1.1", + "slab", + "thiserror 2.0.18", +] + [[package]] name = "sec1" version = "0.7.3" @@ -10743,19 +10993,6 @@ dependencies = [ "zeroize", ] -[[package]] -name = "security-framework" -version = "2.11.1" -source = "registry+https://github.com/rust-lang/crates.io-index" -checksum = "897b2245f0b511c87893af39b033e5ca9cce68824c4d7e7630b5a1d339658d02" -dependencies = [ - "bitflags 2.9.4", - "core-foundation 0.9.4", - "core-foundation-sys", - "libc", - "security-framework-sys", -] - [[package]] name = "security-framework" version = "3.5.0" @@ -10857,6 +11094,15 @@ dependencies = [ "zmij", ] +[[package]] +name = "serde_millis" +version = "0.1.1" +source = "registry+https://github.com/rust-lang/crates.io-index" +checksum = "e6e2dc780ca5ee2c369d1d01d100270203c4ff923d2a4264812d723766434d00" +dependencies = [ + "serde", +] + [[package]] name = "serde_spanned" version = "0.6.9" @@ -10872,7 +11118,7 @@ version = "3.14.1" source = "registry+https://github.com/rust-lang/crates.io-index" checksum = "c522100790450cf78eeac1507263d0a350d4d5b30df0c8e1fe051a10c22b376e" dependencies = [ - "base64 0.22.1", + "base64", "chrono", "hex", "serde", @@ -10913,6 +11159,16 @@ dependencies = [ "cfg-if", "cpufeatures", "digest 0.10.7", + "sha1-asm", +] + +[[package]] +name = "sha1-asm" +version = "0.5.3" +source = "registry+https://github.com/rust-lang/crates.io-index" +checksum = "286acebaf8b67c1130aedffad26f594eff0c1292389158135327d2e23aed582b" +dependencies = [ + "cc", ] [[package]] @@ -11070,7 +11326,7 @@ dependencies = [ "arrayvec 0.7.6", "async-lock", "atomic-take", - "base64 0.22.1", + "base64", "bip39", "blake2-rfc", "bs58", @@ -11123,7 +11379,7 @@ checksum = "f1bba9e591716567d704a8252feeb2f1261a286e1e2cbdd4e49e9197c34a14e2" dependencies = [ "async-channel 2.5.0", "async-lock", - "base64 0.22.1", + "base64", "blake2-rfc", "bs58", "derive_more 2.0.1", @@ -11169,6 +11425,16 @@ dependencies = [ "subtle 2.6.1", ] +[[package]] +name = "socket2" +version = "0.4.10" +source = "registry+https://github.com/rust-lang/crates.io-index" +checksum = "9f7916fc008ca5542385b89a3d3ce689953c143e9304a9bf8beec1de48994c0d" +dependencies = [ + "libc", + "winapi", +] + [[package]] name = "socket2" version = "0.5.10" @@ -11195,7 +11461,7 @@ version = "0.8.1" source = "registry+https://github.com/rust-lang/crates.io-index" checksum = "2e859df029d160cb88608f5d7df7fb4753fd20fdfb4de5644f3d8b8440841721" dependencies = [ - "base64 0.22.1", + "base64", "bytes 1.11.1", "futures 0.3.31", "http 1.3.1", @@ -12012,7 +12278,7 @@ dependencies = [ "derive-where", "environmental", "frame-support", - "hex-literal", + "hex-literal 0.4.1", "impl-trait-for-tuples", "parity-scale-codec", "scale-info", @@ -12057,6 +12323,26 @@ dependencies = [ "syn 1.0.109", ] +[[package]] +name = "str0m" +version = "0.11.1" +source = "registry+https://github.com/rust-lang/crates.io-index" +checksum = "26890ff5b60e33eb8bedcf44792fc459c8f348ecbf2658edb19477571e547ac2" +dependencies = [ + "combine", + "crc", + "fastrand", + "hmac 0.12.1", + "libc", + "once_cell", + "openssl", + "openssl-sys", + "sctp-proto", + "serde", + "sha1", + "tracing", +] + [[package]] name = "strength_reduce" version = "0.2.4" @@ -12390,7 +12676,7 @@ version = "0.43.0" source = "registry+https://github.com/rust-lang/crates.io-index" checksum = "9a9bd240ae819f64ac6898d7ec99a88c8b838dba2fb9d83b843feb70e77e34c8" dependencies = [ - "base64 0.22.1", + "base64", "bip32", "bip39", "cfg-if", @@ -12826,7 +13112,7 @@ dependencies = [ "futures-util", "log", "rustls 0.23.32", - "rustls-native-certs 0.8.1", + "rustls-native-certs", "rustls-pki-types", "tokio 1.47.1", "tokio-rustls", @@ -12972,9 +13258,9 @@ checksum = "8df9b6e13f2d32c91b9bd719c00d1958837bc7dec474d94952798cc8e69eeec3" [[package]] name = "tracing" -version = "0.1.41" +version = "0.1.44" source = "registry+https://github.com/rust-lang/crates.io-index" -checksum = "784e0ac535deb450455cbfa28a6f0df145ea1bb7ae51b821cf5e7927fdcfbdd0" +checksum = "63e71662fa4b2a2c3a26f570f037eb95bb1f85397f3cd8076caed2f026a6d100" dependencies = [ "log", "pin-project-lite 0.2.16", @@ -12984,9 +13270,9 @@ dependencies = [ [[package]] name = "tracing-attributes" -version = "0.1.30" +version = "0.1.31" source = "registry+https://github.com/rust-lang/crates.io-index" -checksum = "81383ab64e72a7a8b8e13130c49e3dab29def6d0c7d76a03087b3cf71c5c6903" +checksum = "7490cfa5ec963746568740651ac6781f701c9c5ea257c58e057f3ba8cf69e8da" dependencies = [ "proc-macro2", "quote", @@ -12995,9 +13281,9 @@ dependencies = [ [[package]] name = "tracing-core" -version = "0.1.34" +version = "0.1.36" source = "registry+https://github.com/rust-lang/crates.io-index" -checksum = "b9d12581f227e93f094d3af2ae690a574abb8a2b9b7a96e7cfe9647b2b617678" +checksum = "db97caf9d906fbde555dd62fa95ddba9eecfd14cb388e4f491a66d74cd5fb79a" dependencies = [ "once_cell", "valuable", @@ -13053,15 +13339,15 @@ dependencies = [ [[package]] name = "tracing-subscriber" -version = "0.3.19" +version = "0.3.23" source = "registry+https://github.com/rust-lang/crates.io-index" -checksum = "e8189decb5ac0fa7bc8b96b7cb9b2701d60d48805aca84a238004d665fcc4008" +checksum = "cb7f578e5945fb242538965c2d0b04418d38ec25c79d160cd279bf0731c8d319" dependencies = [ "matchers", "nu-ansi-term", "once_cell", "parking_lot 0.12.4", - "regex", + "regex-automata", "sharded-slab", "smallvec", "thread_local", @@ -13833,7 +14119,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index" checksum = "138e33ad4bd120f3b1c77d6d0dcdce0de8239555495befcda89393a40ba5e324" dependencies = [ "anyhow", - "base64 0.22.1", + "base64", "directories-next", "log", "postcard", @@ -13989,6 +14275,16 @@ dependencies = [ "wasm-bindgen", ] +[[package]] +name = "webpki" +version = "0.22.4" +source = "registry+https://github.com/rust-lang/crates.io-index" +checksum = "ed63aea5ce73d0ff405984102c42de94fc55a6b75765d621c65262469b3c9b53" +dependencies = [ + "ring 0.17.14", + "untrusted 0.9.0", +] + [[package]] name = "webpki-root-certs" version = "0.26.11" @@ -14267,6 +14563,21 @@ dependencies = [ "windows-link 0.2.0", ] +[[package]] +name = "windows-sys" +version = "0.42.0" +source = "registry+https://github.com/rust-lang/crates.io-index" +checksum = "5a3e1820f08b8513f676f7ab6c1f99ff312fb97b553d30ff4dd86f9f15728aa7" +dependencies = [ + "windows_aarch64_gnullvm 0.42.2", + "windows_aarch64_msvc 0.42.2", + "windows_i686_gnu 0.42.2", + "windows_i686_msvc 0.42.2", + "windows_x86_64_gnu 0.42.2", + "windows_x86_64_gnullvm 0.42.2", + "windows_x86_64_msvc 0.42.2", +] + [[package]] name = "windows-sys" version = "0.45.0" @@ -14747,6 +15058,25 @@ dependencies = [ "time", ] +[[package]] +name = "x509-parser" +version = "0.18.1" +source = "registry+https://github.com/rust-lang/crates.io-index" +checksum = "d43b0f71ce057da06bc0851b23ee24f3f86190b07203dd8f567d0b706a185202" +dependencies = [ + "asn1-rs 0.7.1", + "aws-lc-rs", + "data-encoding", + "der-parser 10.0.0", + "lazy_static", + "nom 7.1.3", + "oid-registry 0.8.1", + "ring 0.17.14", + "rusticata-macros", + "thiserror 2.0.18", + "time", +] + [[package]] name = "xcm-procedural" version = "11.0.2" @@ -14820,6 +15150,16 @@ dependencies = [ "time", ] +[[package]] +name = "yasna" +version = "0.6.0" +source = "registry+https://github.com/rust-lang/crates.io-index" +checksum = "b5f6765e852b9b4dc8e2a76843e4d64d1cea8e79bcde0b6901aea8e7c7f08282" +dependencies = [ + "bit-vec 0.9.1", + "time", +] + [[package]] name = "yoke" version = "0.8.0" diff --git a/Cargo.toml b/Cargo.toml index 6319af9b..6ccff455 100644 --- a/Cargo.toml +++ b/Cargo.toml @@ -9,6 +9,7 @@ repository = "https://github.com/quantus-network/chain#" members = [ "client/cli", "client/consensus/qpow", + "client/litep2p", "client/network", "client/network-sync", "client/network-types", @@ -132,6 +133,7 @@ wasm-timer = { version = "0.2.5" } zeroize = { version = "1.7.0", default-features = false } # Own dependencies +qp-litep2p = { path = "./client/litep2p", default-features = false } pallet-balances = { version = "46.0.0", default-features = false } pallet-mining-rewards = { path = "./pallets/mining-rewards", default-features = false } pallet-multisig = { path = "./pallets/multisig", default-features = false } diff --git a/client/litep2p/Cargo.toml b/client/litep2p/Cargo.toml new file mode 100644 index 00000000..e0bfc13b --- /dev/null +++ b/client/litep2p/Cargo.toml @@ -0,0 +1,82 @@ +[package] +name = "qp-litep2p" +description = "Post-quantum peer-to-peer networking library for Quantus Network" +version = "0.13.2" +edition = "2021" +license = "MIT" +repository = "https://github.com/Quantus-Network/chain" + +[build-dependencies] +prost-build = "0.14" + +[dependencies] +async-trait = "0.1.88" +bs58 = "0.5.1" +bytes = "1.11.1" +cid = "0.11.1" +ed25519-dalek = { version = "2.1.1", features = ["rand_core"] } +futures = "0.3.27" +futures-timer = "3.0.3" +indexmap = { version = "2.9.0", features = ["std"] } +ip_network = "0.4" +libc = "0.2.158" +mockall = "0.13.1" +multiaddr = "0.17.0" +multihash = { version = "0.17.0", default-features = false, features = ["std", "multihash-impl", "identity", "sha2", "sha3", "blake2b"] } +network-interface = "2.0.1" +parking_lot = "0.12.3" +pin-project = "1.1.10" +prost = "0.13.5" +rand = { version = "0.8.0", features = ["getrandom"] } +serde = "1.0.158" +sha2 = "0.10.9" +simple-dns = "0.11.0" +smallvec = "1.15.0" +snow = { version = "0.9.3", features = ["ring-resolver"], default-features = false } +socket2 = { version = "0.5.9", features = ["all"] } +thiserror = "2.0.12" +tokio-stream = "0.1.17" +tokio-util = { version = "0.7.15", features = ["compat", "io", "codec"] } +tokio = { version = "1.45.0", features = ["rt", "net", "io-util", "time", "macros", "sync", "parking_lot"] } +tracing = { version = "0.1.40", features = ["log"] } +hickory-resolver = "0.25.2" +uint = "0.10.0" +unsigned-varint = { version = "0.8.0", features = ["codec"] } +url = "2.5.4" +x25519-dalek = "2.0.1" +x509-parser = "0.17.0" +yasna = "0.5.0" +zeroize = "1.8.1" +yamux = "0.13.9" +enum-display = "0.1.4" + +# Websocket +tokio-tungstenite = { version = "0.27.0", features = ["rustls-tls-native-roots", "url"], optional = true } + +# QUIC +quinn = { version = "0.9.3", default-features = false, features = ["tls-rustls", "runtime-tokio"], optional = true } +rustls = { version = "0.20.7", default-features = false, features = ["dangerous_configuration"], optional = true } +ring = { version = "0.17.14", optional = true } +webpki = { version = "0.22.4", optional = true } +rcgen = { version = "0.14.5", optional = true } + +# WebRTC +str0m = { version = "0.11.1", optional = true } + +# Fuzzing +serde_millis = { version = "0.1", optional = true } + +[dev-dependencies] +quickcheck = "1.0.3" +serde_json = "1.0.140" +tracing-subscriber = { version = "0.3.20", features = ["env-filter"] } +futures_ringbuf = "0.4.0" +hex-literal = "1.0.0" + +[features] +default = ["websocket", "quic"] +websocket = ["dep:tokio-tungstenite"] +quic = ["dep:webpki", "dep:quinn", "dep:rustls", "dep:ring", "dep:rcgen"] +webrtc = ["dep:str0m"] +rsa = ["dep:ring"] +fuzz = ["serde/derive", "serde/rc", "bytes/serde", "dep:serde_millis", "cid/serde", "multihash/serde"] diff --git a/client/litep2p/build.rs b/client/litep2p/build.rs new file mode 100644 index 00000000..bc719abc --- /dev/null +++ b/client/litep2p/build.rs @@ -0,0 +1,21 @@ +fn main() { + let mut config = prost_build::Config::new(); + // Configure Prost to add #[derive(Serialize, Deserialize)] to all generated structs + config.type_attribute( + ".", + "#[cfg_attr(feature = \"fuzz\", derive(serde::Serialize, serde::Deserialize))]", + ); + config + .compile_protos( + &[ + "src/schema/keys.proto", + "src/schema/noise.proto", + "src/schema/webrtc.proto", + "src/protocol/libp2p/schema/identify.proto", + "src/protocol/libp2p/schema/kademlia.proto", + "src/protocol/libp2p/schema/bitswap.proto", + ], + &["src"], + ) + .unwrap(); +} diff --git a/client/litep2p/src/addresses.rs b/client/litep2p/src/addresses.rs new file mode 100644 index 00000000..af52e62f --- /dev/null +++ b/client/litep2p/src/addresses.rs @@ -0,0 +1,159 @@ +// Copyright 2024 litep2p developers +// +// Permission is hereby granted, free of charge, to any person obtaining a +// copy of this software and associated documentation files (the "Software"), +// to deal in the Software without restriction, including without limitation +// the rights to use, copy, modify, merge, publish, distribute, sublicense, +// and/or sell copies of the Software, and to permit persons to whom the +// Software is furnished to do so, subject to the following conditions: +// +// The above copyright notice and this permission notice shall be included in +// all copies or substantial portions of the Software. +// +// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS +// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE +// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER +// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING +// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER +// DEALINGS IN THE SOFTWARE. + +use std::{collections::HashSet, sync::Arc}; + +use multiaddr::{Multiaddr, Protocol}; +use parking_lot::RwLock; + +use crate::PeerId; + +/// Set of the public addresses of the local node. +/// +/// The format of the addresses stored in the set contain the local peer ID. +/// This requirement is enforced by the [`PublicAddresses::add_address`] method, +/// that will add the local peer ID to the address if it is missing. +/// +/// # Note +/// +/// - The addresses are reported to the identify protocol and are used by other nodes to establish a +/// connection with the local node. +/// +/// - Users must ensure that the addresses are reachable from the network. +#[derive(Debug, Clone)] +pub struct PublicAddresses { + pub(crate) inner: Arc>>, + local_peer_id: PeerId, +} + +impl PublicAddresses { + /// Creates new [`PublicAddresses`] from the given peer ID. + pub(crate) fn new(local_peer_id: PeerId) -> Self { + Self { + inner: Arc::new(RwLock::new(HashSet::new())), + local_peer_id, + } + } + + /// Add a public address to the list of addresses. + /// + /// The address must contain the local peer ID, otherwise an error is returned. + /// In case the address does not contain any peer ID, it will be added. + /// + /// Returns true if the address was added, false if it was already present. + pub fn add_address(&self, address: Multiaddr) -> Result { + let address = ensure_local_peer(address, self.local_peer_id)?; + Ok(self.inner.write().insert(address)) + } + + /// Remove the exact public address. + /// + /// The provided address must contain the local peer ID. + pub fn remove_address(&self, address: &Multiaddr) -> bool { + self.inner.write().remove(address) + } + + /// Returns a vector of the available listen addresses. + pub fn get_addresses(&self) -> Vec { + self.inner.read().iter().cloned().collect() + } +} + +/// Check if the address contains the local peer ID. +/// +/// If the address does not contain any peer ID, it will be added. +fn ensure_local_peer( + mut address: Multiaddr, + local_peer_id: PeerId, +) -> Result { + if address.is_empty() { + return Err(InsertionError::EmptyAddress); + } + + // Verify the peer ID from the address corresponds to the local peer ID. + if let Some(peer_id) = PeerId::try_from_multiaddr(&address) { + if peer_id != local_peer_id { + return Err(InsertionError::DifferentPeerId); + } + } else { + address.push(Protocol::P2p(local_peer_id.into())); + } + + Ok(address) +} + +/// The error returned when an address cannot be inserted. +#[derive(Debug, Clone, Copy, PartialEq, Eq)] +pub enum InsertionError { + /// The address is empty. + EmptyAddress, + /// The address contains a different peer ID than the local peer ID. + DifferentPeerId, +} + +#[cfg(test)] +mod tests { + use super::*; + use std::str::FromStr; + + #[test] + fn add_remove_contains() { + let peer_id = PeerId::random(); + let addresses = PublicAddresses::new(peer_id); + let address = Multiaddr::from_str("/dns/domain1.com/tcp/30333").unwrap(); + let peer_address = Multiaddr::from_str("/dns/domain1.com/tcp/30333") + .unwrap() + .with(Protocol::P2p(peer_id.into())); + + assert!(!addresses.get_addresses().contains(&address)); + + assert!(addresses.add_address(address.clone()).unwrap()); + // Adding the address a second time returns Ok(false). + assert!(!addresses.add_address(address.clone()).unwrap()); + + assert!(!addresses.get_addresses().contains(&address)); + assert!(addresses.get_addresses().contains(&peer_address)); + + addresses.remove_address(&peer_address); + assert!(!addresses.get_addresses().contains(&peer_address)); + } + + #[test] + fn get_addresses() { + let peer_id = PeerId::random(); + let addresses = PublicAddresses::new(peer_id); + let address1 = Multiaddr::from_str("/dns/domain1.com/tcp/30333").unwrap(); + let address2 = Multiaddr::from_str("/dns/domain2.com/tcp/30333").unwrap(); + // Addresses different than the local peer ID are ignored. + let address3 = Multiaddr::from_str( + "/dns/domain2.com/tcp/30333/p2p/12D3KooWSueCPH3puP2PcvqPJdNaDNF3jMZjtJtDiSy35pWrbt5h", + ) + .unwrap(); + + assert!(addresses.add_address(address1.clone()).unwrap()); + assert!(addresses.add_address(address2.clone()).unwrap()); + addresses.add_address(address3.clone()).unwrap_err(); + + let addresses = addresses.get_addresses(); + assert_eq!(addresses.len(), 2); + assert!(addresses.contains(&address1.with(Protocol::P2p(peer_id.into())))); + assert!(addresses.contains(&address2.with(Protocol::P2p(peer_id.into())))); + } +} diff --git a/client/litep2p/src/bandwidth.rs b/client/litep2p/src/bandwidth.rs new file mode 100644 index 00000000..4895ad20 --- /dev/null +++ b/client/litep2p/src/bandwidth.rs @@ -0,0 +1,90 @@ +// Copyright 2023 litep2p developers +// +// Permission is hereby granted, free of charge, to any person obtaining a +// copy of this software and associated documentation files (the "Software"), +// to deal in the Software without restriction, including without limitation +// the rights to use, copy, modify, merge, publish, distribute, sublicense, +// and/or sell copies of the Software, and to permit persons to whom the +// Software is furnished to do so, subject to the following conditions: +// +// The above copyright notice and this permission notice shall be included in +// all copies or substantial portions of the Software. +// +// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS +// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE +// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER +// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING +// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER +// DEALINGS IN THE SOFTWARE. + +//! Bandwidth sinks for metering inbound/outbound bytes. + +use std::sync::{ + atomic::{AtomicUsize, Ordering}, + Arc, +}; + +/// Inner bandwidth sink +#[derive(Debug)] +struct InnerBandwidthSink { + /// Number of inbound bytes. + inbound: AtomicUsize, + + /// Number of outbound bytes. + outbound: AtomicUsize, +} + +/// Bandwidth sink which provides metering for inbound/outbound byte usage. +/// +/// The reported values are not necessarily up to date with the latest information +/// and should not be used for metrics that require high precision but they do provide +/// an overall view of the data usage of `litep2p`. +#[derive(Debug, Clone)] +pub struct BandwidthSink(Arc); + +impl BandwidthSink { + /// Create new [`BandwidthSink`]. + pub(crate) fn new() -> Self { + Self(Arc::new(InnerBandwidthSink { + inbound: AtomicUsize::new(0usize), + outbound: AtomicUsize::new(0usize), + })) + } + + /// Increase the amount of inbound bytes. + pub(crate) fn increase_inbound(&self, bytes: usize) { + let _ = self.0.inbound.fetch_add(bytes, Ordering::Relaxed); + } + + /// Increse the amount of outbound bytes. + pub(crate) fn increase_outbound(&self, bytes: usize) { + let _ = self.0.outbound.fetch_add(bytes, Ordering::Relaxed); + } + + /// Get total the number of bytes received. + pub fn inbound(&self) -> usize { + self.0.inbound.load(Ordering::Relaxed) + } + + /// Get total the nubmer of bytes sent. + pub fn outbound(&self) -> usize { + self.0.outbound.load(Ordering::Relaxed) + } +} + +#[cfg(test)] +mod tests { + use super::*; + + #[test] + fn verify_bandwidth() { + let sink = BandwidthSink::new(); + + sink.increase_inbound(1337usize); + sink.increase_outbound(1338usize); + + assert_eq!(sink.inbound(), 1337usize); + assert_eq!(sink.outbound(), 1338usize); + } +} diff --git a/client/litep2p/src/codec/identity.rs b/client/litep2p/src/codec/identity.rs new file mode 100644 index 00000000..f3e47716 --- /dev/null +++ b/client/litep2p/src/codec/identity.rs @@ -0,0 +1,135 @@ +// Copyright 2023 litep2p developers +// +// Permission is hereby granted, free of charge, to any person obtaining a +// copy of this software and associated documentation files (the "Software"), +// to deal in the Software without restriction, including without limitation +// the rights to use, copy, modify, merge, publish, distribute, sublicense, +// and/or sell copies of the Software, and to permit persons to whom the +// Software is furnished to do so, subject to the following conditions: +// +// The above copyright notice and this permission notice shall be included in +// all copies or substantial portions of the Software. +// +// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS +// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE +// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER +// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING +// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER +// DEALINGS IN THE SOFTWARE. + +//! Identity codec that reads/writes `N` bytes from/to source/sink. + +use crate::error::Error; + +use bytes::{BufMut, Bytes, BytesMut}; +use tokio_util::codec::{Decoder, Encoder}; + +/// Identity codec. +pub struct Identity { + payload_len: usize, +} + +impl Identity { + /// Create new [`Identity`] codec. + pub fn new(payload_len: usize) -> Self { + assert!(payload_len != 0); + + Self { payload_len } + } + + /// Encode `payload` using identity codec. + pub fn encode>(payload: T) -> crate::Result> { + let payload: Bytes = payload.into(); + Ok(payload.into()) + } +} + +impl Decoder for Identity { + type Item = BytesMut; + type Error = Error; + + fn decode(&mut self, src: &mut BytesMut) -> Result, Self::Error> { + if src.is_empty() || src.len() < self.payload_len { + return Ok(None); + } + + Ok(Some(src.split_to(self.payload_len))) + } +} + +impl Encoder for Identity { + type Error = Error; + + fn encode(&mut self, item: Bytes, dst: &mut bytes::BytesMut) -> Result<(), Self::Error> { + if item.len() > self.payload_len || item.is_empty() { + return Err(Error::InvalidData); + } + + dst.put_slice(item.as_ref()); + Ok(()) + } +} + +#[cfg(test)] +mod tests { + use super::*; + + #[test] + fn encoding_works() { + let mut codec = Identity::new(48); + let mut out_buf = BytesMut::with_capacity(32); + let bytes = Bytes::from(vec![0u8; 48]); + + assert!(codec.encode(bytes.clone(), &mut out_buf).is_ok()); + assert_eq!(out_buf.freeze(), bytes); + } + + #[test] + fn decoding_works() { + let mut codec = Identity::new(64); + let bytes = vec![3u8; 64]; + let copy = bytes.clone(); + let mut bytes = BytesMut::from(&bytes[..]); + + let decoded = codec.decode(&mut bytes).unwrap().unwrap(); + assert_eq!(decoded, copy); + } + + #[test] + fn decoding_smaller_payloads() { + let mut codec = Identity::new(100); + let bytes = [3u8; 64]; + let mut bytes = BytesMut::from(&bytes[..]); + + assert!(codec.decode(&mut bytes).unwrap().is_none()); + } + + #[test] + fn empty_encode() { + let mut codec = Identity::new(32); + let mut out_buf = BytesMut::with_capacity(32); + assert!(codec.encode(Bytes::new(), &mut out_buf).is_err()); + } + + #[test] + fn decode_encode() { + let mut codec = Identity::new(32); + assert!(codec.decode(&mut BytesMut::new()).unwrap().is_none()); + } + + #[test] + fn direct_encoding_works() { + assert_eq!( + Identity::encode(vec![1, 3, 3, 7]).unwrap(), + vec![1, 3, 3, 7] + ); + } + + #[test] + #[should_panic] + #[cfg(debug_assertions)] + fn empty_identity_codec() { + let _codec = Identity::new(0usize); + } +} diff --git a/client/litep2p/src/codec/mod.rs b/client/litep2p/src/codec/mod.rs new file mode 100644 index 00000000..3604c023 --- /dev/null +++ b/client/litep2p/src/codec/mod.rs @@ -0,0 +1,37 @@ +// Copyright 2023 litep2p developers +// +// Permission is hereby granted, free of charge, to any person obtaining a +// copy of this software and associated documentation files (the "Software"), +// to deal in the Software without restriction, including without limitation +// the rights to use, copy, modify, merge, publish, distribute, sublicense, +// and/or sell copies of the Software, and to permit persons to whom the +// Software is furnished to do so, subject to the following conditions: +// +// The above copyright notice and this permission notice shall be included in +// all copies or substantial portions of the Software. +// +// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS +// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE +// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER +// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING +// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER +// DEALINGS IN THE SOFTWARE. + +//! Protocol codecs. + +pub mod identity; +pub mod unsigned_varint; + +/// Supported protocol codecs. +#[derive(Debug, Copy, Clone)] +pub enum ProtocolCodec { + /// Identity codec where the argument denotes the payload size. + Identity(usize), + + /// Unsigned varint where the argument denotes the maximum message size, if specified. + UnsignedVarint(Option), + + /// Protocol doens't need framing for its messages or is using a custom codec. + Unspecified, +} diff --git a/client/litep2p/src/codec/unsigned_varint.rs b/client/litep2p/src/codec/unsigned_varint.rs new file mode 100644 index 00000000..566abd0b --- /dev/null +++ b/client/litep2p/src/codec/unsigned_varint.rs @@ -0,0 +1,141 @@ +// Copyright 2023 litep2p developers +// +// Permission is hereby granted, free of charge, to any person obtaining a +// copy of this software and associated documentation files (the "Software"), +// to deal in the Software without restriction, including without limitation +// the rights to use, copy, modify, merge, publish, distribute, sublicense, +// and/or sell copies of the Software, and to permit persons to whom the +// Software is furnished to do so, subject to the following conditions: +// +// The above copyright notice and this permission notice shall be included in +// all copies or substantial portions of the Software. +// +// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS +// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE +// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER +// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING +// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER +// DEALINGS IN THE SOFTWARE. + +//! [`unsigned-varint`](https://github.com/multiformats/unsigned-varint) codec. + +use crate::error::Error; + +use bytes::{Bytes, BytesMut}; +use tokio_util::codec::{Decoder, Encoder}; +use unsigned_varint::codec::UviBytes; + +/// Unsigned varint codec. +pub struct UnsignedVarint { + codec: UviBytes, +} + +impl UnsignedVarint { + /// Create new [`UnsignedVarint`] codec. + pub fn new(max_size: Option) -> Self { + let mut codec = UviBytes::::default(); + + if let Some(max_size) = max_size { + codec.set_max_len(max_size); + } + + Self { codec } + } + + /// Set maximum size for encoded/decodes values. + pub fn with_max_size(max_size: usize) -> Self { + let mut codec = UviBytes::::default(); + codec.set_max_len(max_size); + + Self { codec } + } + + /// Encode `payload` using `unsigned-varint`. + pub fn encode>(payload: T) -> crate::Result> { + let payload: Bytes = payload.into(); + + assert!(payload.len() <= u32::MAX as usize); + + let mut bytes = BytesMut::with_capacity(payload.len() + 4); + let mut codec = Self::new(None); + codec.encode(payload, &mut bytes)?; + + Ok(bytes.into()) + } + + /// Decode `payload` into `BytesMut`. + pub fn decode(payload: &mut BytesMut) -> crate::Result { + UviBytes::::default().decode(payload)?.ok_or(Error::InvalidData) + } +} + +impl Decoder for UnsignedVarint { + type Item = BytesMut; + type Error = Error; + + fn decode(&mut self, src: &mut BytesMut) -> Result, Self::Error> { + self.codec.decode(src).map_err(From::from) + } +} + +impl Encoder for UnsignedVarint { + type Error = Error; + + fn encode(&mut self, item: Bytes, dst: &mut bytes::BytesMut) -> Result<(), Self::Error> { + self.codec.encode(item, dst).map_err(From::from) + } +} + +#[cfg(test)] +mod tests { + use super::{Bytes, BytesMut, UnsignedVarint}; + + #[test] + fn max_size_respected() { + let mut codec = UnsignedVarint::with_max_size(1024); + + { + use tokio_util::codec::Encoder; + + let bytes_to_encode: Bytes = vec![0u8; 1024].into(); + let mut out_bytes = BytesMut::with_capacity(2048); + assert!(codec.encode(bytes_to_encode, &mut out_bytes).is_ok()); + } + + { + use tokio_util::codec::Encoder; + + let bytes_to_encode: Bytes = vec![1u8; 1025].into(); + let mut out_bytes = BytesMut::with_capacity(2048); + assert!(codec.encode(bytes_to_encode, &mut out_bytes).is_err()); + } + } + + #[test] + fn encode_decode_works() { + let encoded1 = UnsignedVarint::encode(vec![0u8; 512]).unwrap(); + let mut encoded2 = { + use tokio_util::codec::Encoder; + + let mut codec = UnsignedVarint::with_max_size(512); + let bytes_to_encode: Bytes = vec![0u8; 512].into(); + let mut out_bytes = BytesMut::with_capacity(2048); + codec.encode(bytes_to_encode, &mut out_bytes).unwrap(); + out_bytes + }; + + assert_eq!(encoded1, encoded2); + + let decoded1 = UnsignedVarint::decode(&mut encoded2).unwrap(); + let decoded2 = { + use tokio_util::codec::Decoder; + + let mut codec = UnsignedVarint::with_max_size(512); + let mut encoded1 = BytesMut::from(&encoded1[..]); + codec.decode(&mut encoded1).unwrap().unwrap() + }; + + assert_eq!(decoded1, decoded2); + } +} diff --git a/client/litep2p/src/config.rs b/client/litep2p/src/config.rs new file mode 100644 index 00000000..e00bd4b2 --- /dev/null +++ b/client/litep2p/src/config.rs @@ -0,0 +1,388 @@ +// Copyright 2023 litep2p developers +// +// Permission is hereby granted, free of charge, to any person obtaining a +// copy of this software and associated documentation files (the "Software"), +// to deal in the Software without restriction, including without limitation +// the rights to use, copy, modify, merge, publish, distribute, sublicense, +// and/or sell copies of the Software, and to permit persons to whom the +// Software is furnished to do so, subject to the following conditions: +// +// The above copyright notice and this permission notice shall be included in +// all copies or substantial portions of the Software. +// +// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS +// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE +// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER +// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING +// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER +// DEALINGS IN THE SOFTWARE. + +//! [`Litep2p`](`crate::Litep2p`) configuration. + +use crate::{ + crypto::ed25519::Keypair, + executor::{DefaultExecutor, Executor}, + protocol::{ + libp2p::{bitswap, identify, kademlia, ping}, + mdns::Config as MdnsConfig, + notification, request_response, UserProtocol, + }, + transport::{ + manager::limits::ConnectionLimitsConfig, tcp::config::Config as TcpConfig, + KEEP_ALIVE_TIMEOUT, MAX_PARALLEL_DIALS, + }, + types::protocol::ProtocolName, + PeerId, +}; + +#[cfg(feature = "quic")] +use crate::transport::quic::config::Config as QuicConfig; +#[cfg(feature = "webrtc")] +use crate::transport::webrtc::config::Config as WebRtcConfig; +#[cfg(feature = "websocket")] +use crate::transport::websocket::config::Config as WebSocketConfig; + +use multiaddr::Multiaddr; + +use std::{collections::HashMap, sync::Arc, time::Duration}; + +/// Connection role. +#[derive(Debug, Copy, Clone)] +pub enum Role { + /// Dialer. + Dialer, + + /// Listener. + Listener, +} + +impl From for crate::yamux::Mode { + fn from(value: Role) -> Self { + match value { + Role::Dialer => crate::yamux::Mode::Client, + Role::Listener => crate::yamux::Mode::Server, + } + } +} + +/// Configuration builder for [`Litep2p`](`crate::Litep2p`). +pub struct ConfigBuilder { + /// TCP transport configuration. + tcp: Option, + + /// QUIC transport config. + #[cfg(feature = "quic")] + quic: Option, + + /// WebRTC transport config. + #[cfg(feature = "webrtc")] + webrtc: Option, + + /// WebSocket transport config. + #[cfg(feature = "websocket")] + websocket: Option, + + /// Keypair. + keypair: Option, + + /// Ping protocol config. + ping: Option, + + /// Identify protocol config. + identify: Option, + + /// Kademlia protocol config. + kademlia: Vec, + + /// Bitswap protocol config. + bitswap: Option, + + /// Notification protocols. + notification_protocols: HashMap, + + /// Request-response protocols. + request_response_protocols: HashMap, + + /// User protocols. + user_protocols: HashMap>, + + /// mDNS configuration. + mdns: Option, + + /// Known addresess. + known_addresses: Vec<(PeerId, Vec)>, + + /// Executor for running futures. + executor: Option>, + + /// Maximum number of parallel dial attempts. + max_parallel_dials: usize, + + /// Connection limits config. + connection_limits: ConnectionLimitsConfig, + + /// Close the connection if no substreams are open within this time frame. + keep_alive_timeout: Duration, + + /// Use system's DNS config. + use_system_dns_config: bool, +} + +impl Default for ConfigBuilder { + fn default() -> Self { + Self::new() + } +} + +impl ConfigBuilder { + /// Create empty [`ConfigBuilder`]. + pub fn new() -> Self { + Self { + tcp: None, + #[cfg(feature = "quic")] + quic: None, + #[cfg(feature = "webrtc")] + webrtc: None, + #[cfg(feature = "websocket")] + websocket: None, + keypair: None, + ping: None, + identify: None, + kademlia: Vec::new(), + bitswap: None, + mdns: None, + executor: None, + max_parallel_dials: MAX_PARALLEL_DIALS, + user_protocols: HashMap::new(), + notification_protocols: HashMap::new(), + request_response_protocols: HashMap::new(), + known_addresses: Vec::new(), + connection_limits: ConnectionLimitsConfig::default(), + keep_alive_timeout: KEEP_ALIVE_TIMEOUT, + use_system_dns_config: false, + } + } + + /// Add TCP transport configuration, enabling the transport. + pub fn with_tcp(mut self, config: TcpConfig) -> Self { + self.tcp = Some(config); + self + } + + /// Add QUIC transport configuration, enabling the transport. + #[cfg(feature = "quic")] + pub fn with_quic(mut self, config: QuicConfig) -> Self { + self.quic = Some(config); + self + } + + /// Add WebRTC transport configuration, enabling the transport. + #[cfg(feature = "webrtc")] + pub fn with_webrtc(mut self, config: WebRtcConfig) -> Self { + self.webrtc = Some(config); + self + } + + /// Add WebSocket transport configuration, enabling the transport. + #[cfg(feature = "websocket")] + pub fn with_websocket(mut self, config: WebSocketConfig) -> Self { + self.websocket = Some(config); + self + } + + /// Add keypair. + /// + /// If no keypair is specified, litep2p creates a new keypair. + pub fn with_keypair(mut self, keypair: Keypair) -> Self { + self.keypair = Some(keypair); + self + } + + /// Enable notification protocol. + pub fn with_notification_protocol(mut self, config: notification::Config) -> Self { + self.notification_protocols.insert(config.protocol_name().clone(), config); + self + } + + /// Enable IPFS Ping protocol. + pub fn with_libp2p_ping(mut self, config: ping::Config) -> Self { + self.ping = Some(config); + self + } + + /// Enable IPFS Identify protocol. + pub fn with_libp2p_identify(mut self, config: identify::Config) -> Self { + self.identify = Some(config); + self + } + + /// Enable IPFS Kademlia protocol. + pub fn with_libp2p_kademlia(mut self, config: kademlia::Config) -> Self { + self.kademlia.push(config); + self + } + + /// Enable IPFS Bitswap protocol. + pub fn with_libp2p_bitswap(mut self, config: bitswap::Config) -> Self { + self.bitswap = Some(config); + self + } + + /// Enable request-response protocol. + pub fn with_request_response_protocol(mut self, config: request_response::Config) -> Self { + self.request_response_protocols.insert(config.protocol_name().clone(), config); + self + } + + /// Enable user protocol. + pub fn with_user_protocol(mut self, protocol: Box) -> Self { + self.user_protocols.insert(protocol.protocol(), protocol); + self + } + + /// Enable mDNS for peer discoveries in the local network. + pub fn with_mdns(mut self, config: MdnsConfig) -> Self { + self.mdns = Some(config); + self + } + + /// Add known address(es) for one or more peers. + pub fn with_known_addresses( + mut self, + addresses: impl Iterator)>, + ) -> Self { + self.known_addresses = addresses.collect(); + self + } + + /// Add executor for running futures spawned by `litep2p`. + /// + /// If no executor is specified, `litep2p` defaults to calling `tokio::spawn()`. + pub fn with_executor(mut self, executor: Arc) -> Self { + self.executor = Some(executor); + self + } + + /// How many addresses should litep2p attempt to dial in parallel. + /// + /// The provided number is clamped to a minimum of 1. + pub fn with_max_parallel_dials(mut self, max_parallel_dials: usize) -> Self { + self.max_parallel_dials = max_parallel_dials.max(1); + self + } + + /// Set connection limits configuration. + pub fn with_connection_limits(mut self, config: ConnectionLimitsConfig) -> Self { + self.connection_limits = config; + self + } + + /// Set keep alive timeout for connections. + pub fn with_keep_alive_timeout(mut self, timeout: Duration) -> Self { + self.keep_alive_timeout = timeout; + self + } + + /// Set DNS resolver according to system configuration instead of default (Google). + pub fn with_system_resolver(mut self) -> Self { + self.use_system_dns_config = true; + self + } + + /// Build [`Litep2pConfig`]. + pub fn build(mut self) -> Litep2pConfig { + let keypair = match self.keypair { + Some(keypair) => keypair, + None => Keypair::generate(), + }; + + Litep2pConfig { + keypair, + tcp: self.tcp.take(), + mdns: self.mdns.take(), + #[cfg(feature = "quic")] + quic: self.quic.take(), + #[cfg(feature = "webrtc")] + webrtc: self.webrtc.take(), + #[cfg(feature = "websocket")] + websocket: self.websocket.take(), + ping: self.ping.take(), + identify: self.identify.take(), + kademlia: self.kademlia, + bitswap: self.bitswap.take(), + max_parallel_dials: self.max_parallel_dials, + executor: self.executor.map_or(Arc::new(DefaultExecutor {}), |executor| executor), + user_protocols: self.user_protocols, + notification_protocols: self.notification_protocols, + request_response_protocols: self.request_response_protocols, + known_addresses: self.known_addresses, + connection_limits: self.connection_limits, + keep_alive_timeout: self.keep_alive_timeout, + use_system_dns_config: self.use_system_dns_config, + } + } +} + +/// Configuration for [`Litep2p`](`crate::Litep2p`). +pub struct Litep2pConfig { + // TCP transport configuration. + pub(crate) tcp: Option, + + /// QUIC transport config. + #[cfg(feature = "quic")] + pub(crate) quic: Option, + + /// WebRTC transport config. + #[cfg(feature = "webrtc")] + pub(crate) webrtc: Option, + + /// WebSocket transport config. + #[cfg(feature = "websocket")] + pub(crate) websocket: Option, + + /// Keypair. + pub(crate) keypair: Keypair, + + /// Ping protocol configuration, if enabled. + pub(crate) ping: Option, + + /// Identify protocol configuration, if enabled. + pub(crate) identify: Option, + + /// Kademlia protocol configuration, if enabled. + pub(crate) kademlia: Vec, + + /// Bitswap protocol configuration, if enabled. + pub(crate) bitswap: Option, + + /// Notification protocols. + pub(crate) notification_protocols: HashMap, + + /// Request-response protocols. + pub(crate) request_response_protocols: HashMap, + + /// User protocols. + pub(crate) user_protocols: HashMap>, + + /// mDNS configuration. + pub(crate) mdns: Option, + + /// Executor. + pub(crate) executor: Arc, + + /// Maximum number of parallel dial attempts. + pub(crate) max_parallel_dials: usize, + + /// Known addresses. + pub(crate) known_addresses: Vec<(PeerId, Vec)>, + + /// Connection limits config. + pub(crate) connection_limits: ConnectionLimitsConfig, + + /// Close the connection if no substreams are open within this time frame. + pub(crate) keep_alive_timeout: Duration, + + /// Use system's DNS config. + pub(crate) use_system_dns_config: bool, +} diff --git a/client/litep2p/src/crypto/ed25519.rs b/client/litep2p/src/crypto/ed25519.rs new file mode 100644 index 00000000..2162f48c --- /dev/null +++ b/client/litep2p/src/crypto/ed25519.rs @@ -0,0 +1,268 @@ +// Copyright 2019 Parity Technologies (UK) Ltd. +// Copyright 2023 litep2p developers +// +// Permission is hereby granted, free of charge, to any person obtaining a +// copy of this software and associated documentation files (the "Software"), +// to deal in the Software without restriction, including without limitation +// the rights to use, copy, modify, merge, publish, distribute, sublicense, +// and/or sell copies of the Software, and to permit persons to whom the +// Software is furnished to do so, subject to the following conditions: +// +// The above copyright notice and this permission notice shall be included in +// all copies or substantial portions of the Software. +// +// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS +// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE +// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER +// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING +// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER +// DEALINGS IN THE SOFTWARE. + +//! Ed25519 keys. + +use crate::{ + error::{Error, ParseError}, + PeerId, +}; + +use ed25519_dalek::{self as ed25519, Signer as _, Verifier as _}; +use std::fmt; +use zeroize::Zeroize; + +/// An Ed25519 keypair. +#[derive(Clone)] +pub struct Keypair(ed25519::SigningKey); + +impl Keypair { + /// Generate a new random Ed25519 keypair. + pub fn generate() -> Keypair { + Keypair::from(SecretKey::generate()) + } + + /// Convert the keypair into a byte array by concatenating the bytes + /// of the secret scalar and the compressed public point, + /// an informal standard for encoding Ed25519 keypairs. + pub fn to_bytes(&self) -> [u8; 64] { + self.0.to_keypair_bytes() + } + + /// Try to parse a keypair from the [binary format](https://datatracker.ietf.org/doc/html/rfc8032#section-5.1.5) + /// produced by [`Keypair::to_bytes`], zeroing the input on success. + /// + /// Note that this binary format is the same as `ed25519_dalek`'s and `ed25519_zebra`'s. + pub fn try_from_bytes(kp: &mut [u8]) -> Result { + let bytes = <[u8; 64]>::try_from(&*kp) + .map_err(|e| Error::Other(format!("Failed to parse ed25519 keypair: {e}")))?; + + ed25519::SigningKey::from_keypair_bytes(&bytes) + .map(|k| { + kp.zeroize(); + Keypair(k) + }) + .map_err(|e| Error::Other(format!("Failed to parse ed25519 keypair: {e}"))) + } + + /// Sign a message using the private key of this keypair. + pub fn sign(&self, msg: &[u8]) -> Vec { + self.0.sign(msg).to_bytes().to_vec() + } + + /// Get the public key of this keypair. + pub fn public(&self) -> PublicKey { + PublicKey(self.0.verifying_key()) + } + + /// Get the secret key of this keypair. + pub fn secret(&self) -> SecretKey { + SecretKey(self.0.to_bytes()) + } +} + +impl fmt::Debug for Keypair { + fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { + f.debug_struct("Keypair").field("public", &self.0.verifying_key()).finish() + } +} + +/// Demote an Ed25519 keypair to a secret key. +impl From for SecretKey { + fn from(kp: Keypair) -> SecretKey { + SecretKey(kp.0.to_bytes()) + } +} + +/// Promote an Ed25519 secret key into a keypair. +impl From for Keypair { + fn from(sk: SecretKey) -> Keypair { + let signing = ed25519::SigningKey::from_bytes(&sk.0); + Keypair(signing) + } +} + +/// An Ed25519 public key. +#[derive(Eq, Clone)] +pub struct PublicKey(ed25519::VerifyingKey); + +impl fmt::Debug for PublicKey { + fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { + f.write_str("PublicKey(compressed): ")?; + for byte in self.0.as_bytes() { + write!(f, "{byte:x}")?; + } + Ok(()) + } +} + +impl PartialEq for PublicKey { + fn eq(&self, other: &Self) -> bool { + self.0.as_bytes().eq(other.0.as_bytes()) + } +} + +impl PublicKey { + /// Verify the Ed25519 signature on a message using the public key. + pub fn verify(&self, msg: &[u8], sig: &[u8]) -> bool { + ed25519::Signature::try_from(sig).and_then(|s| self.0.verify(msg, &s)).is_ok() + } + + /// Convert the public key to a byte array in compressed form, i.e. + /// where one coordinate is represented by a single bit. + pub fn to_bytes(&self) -> [u8; 32] { + self.0.to_bytes() + } + + /// Get the public key as a byte slice. + pub fn as_bytes(&self) -> &[u8] { + self.0.as_bytes() + } + + /// Try to parse a public key from a byte array containing the actual key as produced by + /// `to_bytes`. + pub fn try_from_bytes(k: &[u8]) -> Result { + let k = <[u8; 32]>::try_from(k).map_err(|_| ParseError::InvalidPublicKey)?; + + // The error type of the verifying key is deliberately opaque as to avoid side-channel + // leakage. We can't provide a more specific error type here. + ed25519::VerifyingKey::from_bytes(&k) + .map_err(|_| ParseError::InvalidPublicKey) + .map(PublicKey) + } + + /// Convert public key to `PeerId`. + pub fn to_peer_id(&self) -> PeerId { + crate::crypto::PublicKey::Ed25519(self.clone()).into() + } +} + +/// An Ed25519 secret key. +#[derive(Clone)] +pub struct SecretKey(ed25519::SecretKey); + +/// View the bytes of the secret key. +impl AsRef<[u8]> for SecretKey { + fn as_ref(&self) -> &[u8] { + &self.0[..] + } +} + +impl fmt::Debug for SecretKey { + fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { + write!(f, "SecretKey") + } +} + +impl SecretKey { + /// Generate a new Ed25519 secret key. + pub fn generate() -> SecretKey { + let signing = ed25519::SigningKey::generate(&mut rand::rngs::OsRng); + SecretKey(signing.to_bytes()) + } + /// Try to parse an Ed25519 secret key from a byte slice + /// containing the actual key, zeroing the input on success. + /// If the bytes do not constitute a valid Ed25519 secret key, an error is + /// returned. + pub fn try_from_bytes(mut sk_bytes: impl AsMut<[u8]>) -> crate::Result { + let sk_bytes = sk_bytes.as_mut(); + let secret = <[u8; 32]>::try_from(&*sk_bytes) + .map_err(|e| Error::Other(format!("Failed to parse ed25519 secret key: {e}")))?; + sk_bytes.zeroize(); + Ok(SecretKey(secret)) + } + + /// Convert this secret key to a byte array. + pub fn to_bytes(&self) -> [u8; 32] { + self.0 + } +} + +#[cfg(test)] +mod tests { + use super::*; + use quickcheck::*; + + fn eq_keypairs(kp1: &Keypair, kp2: &Keypair) -> bool { + kp1.public() == kp2.public() && kp1.0.to_bytes() == kp2.0.to_bytes() + } + + #[test] + fn ed25519_keypair_encode_decode() { + fn prop() -> bool { + let kp1 = Keypair::generate(); + let mut kp1_enc = kp1.to_bytes(); + let kp2 = Keypair::try_from_bytes(&mut kp1_enc).unwrap(); + eq_keypairs(&kp1, &kp2) && kp1_enc.iter().all(|b| *b == 0) + } + QuickCheck::new().tests(10).quickcheck(prop as fn() -> _); + } + + #[test] + fn ed25519_keypair_from_secret() { + fn prop() -> bool { + let kp1 = Keypair::generate(); + let mut sk = kp1.0.to_bytes(); + let kp2 = Keypair::from(SecretKey::try_from_bytes(&mut sk).unwrap()); + eq_keypairs(&kp1, &kp2) && sk == [0u8; 32] + } + QuickCheck::new().tests(10).quickcheck(prop as fn() -> _); + } + + #[test] + fn ed25519_signature() { + let kp = Keypair::generate(); + let pk = kp.public(); + + let msg = "hello world".as_bytes(); + let sig = kp.sign(msg); + assert!(pk.verify(msg, &sig)); + + let mut invalid_sig = sig.clone(); + invalid_sig[3..6].copy_from_slice(&[10, 23, 42]); + assert!(!pk.verify(msg, &invalid_sig)); + + let invalid_msg = "h3ll0 w0rld".as_bytes(); + assert!(!pk.verify(invalid_msg, &sig)); + } + + #[test] + fn secret_key() { + let _ = tracing_subscriber::fmt() + .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) + .try_init(); + + let key = Keypair::generate(); + tracing::trace!("keypair: {:?}", key); + tracing::trace!("secret: {:?}", key.secret()); + tracing::trace!("public: {:?}", key.public()); + + let new_key = Keypair::from(key.secret()); + assert_eq!(new_key.secret().as_ref(), key.secret().as_ref()); + assert_eq!(new_key.public(), key.public()); + + let new_secret = SecretKey::from(new_key.clone()); + assert_eq!(new_secret.as_ref(), new_key.secret().as_ref()); + + let cloned_secret = new_secret.clone(); + assert_eq!(cloned_secret.as_ref(), new_secret.as_ref()); + } +} diff --git a/client/litep2p/src/crypto/mod.rs b/client/litep2p/src/crypto/mod.rs new file mode 100644 index 00000000..f50f77b5 --- /dev/null +++ b/client/litep2p/src/crypto/mod.rs @@ -0,0 +1,147 @@ +// Copyright 2023 Protocol Labs. +// Copyright 2023 litep2p developers +// +// Permission is hereby granted, free of charge, to any person obtaining a +// copy of this software and associated documentation files (the "Software"), +// to deal in the Software without restriction, including without limitation +// the rights to use, copy, modify, merge, publish, distribute, sublicense, +// and/or sell copies of the Software, and to permit persons to whom the +// Software is furnished to do so, subject to the following conditions: +// +// The above copyright notice and this permission notice shall be included in +// all copies or substantial portions of the Software. +// +// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS +// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE +// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER +// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING +// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER +// DEALINGS IN THE SOFTWARE. + +//! Crypto-related code. + +use crate::{error::ParseError, peer_id::*}; + +pub mod ed25519; +#[cfg(feature = "rsa")] +pub mod rsa; + +pub(crate) mod noise; +#[cfg(feature = "quic")] +pub(crate) mod tls; +pub(crate) mod keys_proto { + include!(concat!(env!("OUT_DIR"), "/keys_proto.rs")); +} + +/// The public key of a node's identity keypair. +#[derive(Clone, Debug, PartialEq, Eq)] +pub enum PublicKey { + /// A public Ed25519 key. + Ed25519(ed25519::PublicKey), +} + +impl PublicKey { + /// Encode the public key into a protobuf structure for storage or + /// exchange with other nodes. + pub fn to_protobuf_encoding(&self) -> Vec { + use prost::Message; + + let public_key = keys_proto::PublicKey::from(self); + + let mut buf = Vec::with_capacity(public_key.encoded_len()); + public_key.encode(&mut buf).expect("Vec provides capacity as needed"); + buf + } + + /// Convert the `PublicKey` into the corresponding `PeerId`. + pub fn to_peer_id(&self) -> PeerId { + self.into() + } +} + +impl From<&PublicKey> for keys_proto::PublicKey { + fn from(key: &PublicKey) -> Self { + match key { + PublicKey::Ed25519(key) => keys_proto::PublicKey { + r#type: keys_proto::KeyType::Ed25519 as i32, + data: key.to_bytes().to_vec(), + }, + } + } +} + +impl TryFrom for PublicKey { + type Error = ParseError; + + fn try_from(pubkey: keys_proto::PublicKey) -> Result { + let key_type = keys_proto::KeyType::try_from(pubkey.r#type) + .map_err(|_| ParseError::UnknownKeyType(pubkey.r#type))?; + + if key_type == keys_proto::KeyType::Ed25519 { + Ok(ed25519::PublicKey::try_from_bytes(&pubkey.data).map(PublicKey::Ed25519)?) + } else { + Err(ParseError::UnknownKeyType(key_type as i32)) + } + } +} + +impl From for PublicKey { + fn from(public_key: ed25519::PublicKey) -> Self { + PublicKey::Ed25519(public_key) + } +} + +/// The public key of a remote node's identity keypair. Supports RSA keys additionally to ed25519. +#[derive(Clone, Debug, PartialEq, Eq)] +pub enum RemotePublicKey { + /// A public Ed25519 key. + Ed25519(ed25519::PublicKey), + /// A public RSA key. + #[cfg(feature = "rsa")] + Rsa(rsa::PublicKey), +} + +impl RemotePublicKey { + /// Verify a signature for a message using this public key, i.e. check + /// that the signature has been produced by the corresponding + /// private key (authenticity), and that the message has not been + /// tampered with (integrity). + #[must_use] + pub fn verify(&self, msg: &[u8], sig: &[u8]) -> bool { + use RemotePublicKey::*; + match self { + Ed25519(pk) => pk.verify(msg, sig), + #[cfg(feature = "rsa")] + Rsa(pk) => pk.verify(msg, sig), + } + } + + /// Decode a public key from a protobuf structure, e.g. read from storage + /// or received from another node. + pub fn from_protobuf_encoding(bytes: &[u8]) -> Result { + use prost::Message; + + let pubkey = keys_proto::PublicKey::decode(bytes)?; + + pubkey.try_into() + } +} + +impl TryFrom for RemotePublicKey { + type Error = ParseError; + + fn try_from(pubkey: keys_proto::PublicKey) -> Result { + let key_type = keys_proto::KeyType::try_from(pubkey.r#type) + .map_err(|_| ParseError::UnknownKeyType(pubkey.r#type))?; + + match key_type { + keys_proto::KeyType::Ed25519 => + ed25519::PublicKey::try_from_bytes(&pubkey.data).map(RemotePublicKey::Ed25519), + #[cfg(feature = "rsa")] + keys_proto::KeyType::Rsa => + rsa::PublicKey::try_decode_x509(&pubkey.data).map(RemotePublicKey::Rsa), + _ => Err(ParseError::UnknownKeyType(key_type as i32)), + } + } +} diff --git a/client/litep2p/src/crypto/noise/mod.rs b/client/litep2p/src/crypto/noise/mod.rs new file mode 100644 index 00000000..f5775684 --- /dev/null +++ b/client/litep2p/src/crypto/noise/mod.rs @@ -0,0 +1,1154 @@ +// Copyright 2019 Parity Technologies (UK) Ltd. +// Copyright 2023 litep2p developers +// +// Permission is hereby granted, free of charge, to any person obtaining a +// copy of this software and associated documentation files (the "Software"), +// to deal in the Software without restriction, including without limitation +// the rights to use, copy, modify, merge, publish, distribute, sublicense, +// and/or sell copies of the Software, and to permit persons to whom the +// Software is furnished to do so, subject to the following conditions: +// +// The above copyright notice and this permission notice shall be included in +// all copies or substantial portions of the Software. +// +// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS +// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE +// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER +// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING +// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER +// DEALINGS IN THE SOFTWARE. + +//! Noise handshake and transport implementations. + +use crate::{ + config::Role, + crypto::{ed25519::Keypair, PublicKey, RemotePublicKey}, + error::{NegotiationError, ParseError}, + PeerId, +}; + +use bytes::{Buf, Bytes, BytesMut}; +use futures::io::{AsyncRead, AsyncReadExt, AsyncWrite, AsyncWriteExt}; +use prost::Message; +use snow::{Builder, HandshakeState, TransportState}; + +use std::{ + fmt, io, + pin::Pin, + task::{Context, Poll}, +}; + +mod protocol; +mod x25519_spec; + +mod handshake_schema { + include!(concat!(env!("OUT_DIR"), "/noise.rs")); +} + +/// Noise parameters. +const NOISE_PARAMETERS: &str = "Noise_XX_25519_ChaChaPoly_SHA256"; + +/// Prefix of static key signatures for domain separation. +pub(crate) const STATIC_KEY_DOMAIN: &str = "noise-libp2p-static-key:"; + +/// Maximum Noise message size. +const MAX_NOISE_MSG_LEN: usize = 65536; + +/// Space given to the encryption buffer to hold key material. +const NOISE_EXTRA_ENCRYPT_SPACE: usize = 16; + +/// Max read ahead factor for the noise socket. +/// +/// Specifies how many multiples of `MAX_NOISE_MESSAGE_LEN` are read from the socket +/// using one call to `poll_read()`. +pub(crate) const MAX_READ_AHEAD_FACTOR: usize = 5; + +/// Maximum write buffer size. +pub(crate) const MAX_WRITE_BUFFER_SIZE: usize = 2; + +/// Max. length for Noise protocol message payloads. +pub const MAX_FRAME_LEN: usize = MAX_NOISE_MSG_LEN - NOISE_EXTRA_ENCRYPT_SPACE; + +/// Logging target for the file. +const LOG_TARGET: &str = "litep2p::crypto::noise"; + +#[derive(Debug)] +#[allow(clippy::large_enum_variant)] +enum NoiseState { + Handshake(HandshakeState), + Transport(TransportState), +} + +pub struct NoiseContext { + keypair: snow::Keypair, + noise: NoiseState, + role: Role, + pub payload: Vec, +} + +impl fmt::Debug for NoiseContext { + fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { + f.debug_struct("NoiseContext") + .field("public", &self.noise) + .field("payload", &self.payload) + .field("role", &self.role) + .finish() + } +} + +impl NoiseContext { + /// Assemble Noise payload and return [`NoiseContext`]. + fn assemble( + noise: snow::HandshakeState, + keypair: snow::Keypair, + id_keys: &Keypair, + role: Role, + ) -> Result { + let noise_payload = handshake_schema::NoiseHandshakePayload { + identity_key: Some(PublicKey::Ed25519(id_keys.public()).to_protobuf_encoding()), + identity_sig: Some( + id_keys.sign(&[STATIC_KEY_DOMAIN.as_bytes(), keypair.public.as_ref()].concat()), + ), + ..Default::default() + }; + + let mut payload = Vec::with_capacity(noise_payload.encoded_len()); + noise_payload.encode(&mut payload).map_err(ParseError::from)?; + + Ok(Self { + noise: NoiseState::Handshake(noise), + keypair, + payload, + role, + }) + } + + pub fn new(keypair: &Keypair, role: Role) -> Result { + tracing::trace!(target: LOG_TARGET, ?role, "create new noise configuration"); + + let builder: Builder<'_> = Builder::with_resolver( + NOISE_PARAMETERS.parse().expect("qed; Valid noise pattern"), + Box::new(protocol::Resolver), + ); + + let dh_keypair = builder.generate_keypair()?; + let static_key = &dh_keypair.private; + + let noise = match role { + Role::Dialer => builder.local_private_key(static_key).build_initiator()?, + Role::Listener => builder.local_private_key(static_key).build_responder()?, + }; + + Self::assemble(noise, dh_keypair, keypair, role) + } + + /// Create new [`NoiseContext`] with prologue. + #[cfg(feature = "webrtc")] + pub fn with_prologue(id_keys: &Keypair, prologue: Vec) -> Result { + let noise: Builder<'_> = Builder::with_resolver( + NOISE_PARAMETERS.parse().expect("qed; Valid noise pattern"), + Box::new(protocol::Resolver), + ); + + let keypair = noise.generate_keypair()?; + + let noise = noise + .local_private_key(&keypair.private) + .prologue(&prologue) + .build_initiator()?; + + Self::assemble(noise, keypair, id_keys, Role::Dialer) + } + + /// Get remote peer ID from the received Noise payload. + #[cfg(feature = "webrtc")] + pub fn get_remote_peer_id(&mut self, reply: &[u8]) -> Result { + if reply.len() < 2 { + tracing::error!(target: LOG_TARGET, "reply too short to contain length prefix"); + return Err(NegotiationError::ParseError(ParseError::InvalidReplyLength)); + } + + let (len_slice, reply) = reply.split_at(2); + let len = u16::from_be_bytes( + len_slice + .try_into() + .map_err(|_| NegotiationError::ParseError(ParseError::InvalidPublicKey))?, + ) as usize; + + let mut buffer = vec![0u8; len]; + + let NoiseState::Handshake(ref mut noise) = self.noise else { + tracing::error!(target: LOG_TARGET, "invalid state to read the second handshake message"); + debug_assert!(false); + return Err(NegotiationError::StateMismatch); + }; + + let res = noise.read_message(reply, &mut buffer)?; + buffer.truncate(res); + + let payload = handshake_schema::NoiseHandshakePayload::decode(buffer.as_slice()) + .map_err(|err| NegotiationError::ParseError(err.into()))?; + + let identity = payload.identity_key.ok_or(NegotiationError::PeerIdMissing)?; + Ok(PeerId::from_public_key_protobuf(&identity)) + } + + /// Get first message. + /// + /// Listener only sends one message (the payload) + pub fn first_message(&mut self, role: Role) -> Result, NegotiationError> { + match role { + Role::Dialer => { + tracing::trace!(target: LOG_TARGET, "get noise dialer first message"); + + let NoiseState::Handshake(ref mut noise) = self.noise else { + tracing::error!(target: LOG_TARGET, "invalid state to read the first handshake message"); + debug_assert!(false); + return Err(NegotiationError::StateMismatch); + }; + + let mut buffer = vec![0u8; 256]; + let nwritten = noise.write_message(&[], &mut buffer)?; + buffer.truncate(nwritten); + + let size = nwritten as u16; + let mut size = size.to_be_bytes().to_vec(); + size.append(&mut buffer); + + Ok(size) + } + Role::Listener => self.second_message(), + } + } + + /// Get second message. + /// + /// Only the dialer sends the second message. + pub fn second_message(&mut self) -> Result, NegotiationError> { + tracing::trace!(target: LOG_TARGET, "get noise paylod message"); + + let NoiseState::Handshake(ref mut noise) = self.noise else { + tracing::error!(target: LOG_TARGET, "invalid state to read the first handshake message"); + debug_assert!(false); + return Err(NegotiationError::StateMismatch); + }; + + let mut buffer = vec![0u8; 2048]; + let nwritten = noise.write_message(&self.payload, &mut buffer)?; + buffer.truncate(nwritten); + + let size = nwritten as u16; + let mut size = size.to_be_bytes().to_vec(); + size.append(&mut buffer); + + Ok(size) + } + + /// Read handshake message. + async fn read_handshake_message( + &mut self, + io: &mut T, + ) -> Result { + let mut size = BytesMut::zeroed(2); + io.read_exact(&mut size).await?; + let size = size.get_u16(); + + let mut message = BytesMut::zeroed(size as usize); + io.read_exact(&mut message).await?; + + // TODO: https://github.com/paritytech/litep2p/issues/332 use correct overhead. + let mut out = BytesMut::new(); + out.resize(message.len() + 200, 0u8); + + let NoiseState::Handshake(ref mut noise) = self.noise else { + tracing::error!(target: LOG_TARGET, "invalid state to read handshake message"); + debug_assert!(false); + return Err(NegotiationError::StateMismatch); + }; + + let nread = noise.read_message(&message, &mut out)?; + out.truncate(nread); + + Ok(out.freeze()) + } + + fn read_message(&mut self, message: &[u8], out: &mut [u8]) -> Result { + match self.noise { + NoiseState::Handshake(ref mut noise) => noise.read_message(message, out), + NoiseState::Transport(ref mut noise) => noise.read_message(message, out), + } + } + + fn write_message(&mut self, message: &[u8], out: &mut [u8]) -> Result { + match self.noise { + NoiseState::Handshake(ref mut noise) => noise.write_message(message, out), + NoiseState::Transport(ref mut noise) => noise.write_message(message, out), + } + } + + fn get_handshake_dh_remote_pubkey(&self) -> Result<&[u8], NegotiationError> { + let NoiseState::Handshake(ref noise) = self.noise else { + tracing::error!(target: LOG_TARGET, "invalid state to get remote public key"); + return Err(NegotiationError::StateMismatch); + }; + + let Some(dh_remote_pubkey) = noise.get_remote_static() else { + tracing::error!(target: LOG_TARGET, "expected remote public key at the end of XX session"); + return Err(NegotiationError::IoError(std::io::ErrorKind::InvalidData)); + }; + + Ok(dh_remote_pubkey) + } + + /// Convert Noise into transport mode. + fn into_transport(self) -> Result { + let transport = match self.noise { + NoiseState::Handshake(noise) => noise.into_transport_mode()?, + NoiseState::Transport(_) => return Err(NegotiationError::StateMismatch), + }; + + Ok(NoiseContext { + keypair: self.keypair, + payload: self.payload, + role: self.role, + noise: NoiseState::Transport(transport), + }) + } +} + +enum ReadState { + ReadData { + max_read: usize, + }, + ReadFrameLen, + ProcessNextFrame { + pending: Option>, + offset: usize, + size: usize, + frame_size: usize, + }, +} + +enum WriteState { + /// No pending encrypted data, ready to accept new writes + Idle, + /// Writing encrypted data to socket + Writing { + /// Offset into encrypt_buffer that's been written to socket + offset: usize, + /// Total length of encrypted data in encrypt_buffer + encrypted_len: usize, + }, +} + +pub struct NoiseSocket { + io: S, + noise: NoiseContext, + current_frame_size: Option, + write_state: WriteState, + encrypt_buffer: Vec, + offset: usize, + nread: usize, + read_state: ReadState, + read_buffer: Vec, + canonical_max_read: usize, + decrypt_buffer: Option>, + peer: PeerId, + ty: HandshakeTransport, +} + +impl NoiseSocket { + fn new( + io: S, + noise: NoiseContext, + max_read_ahead_factor: usize, + max_write_buffer_size: usize, + peer: PeerId, + ty: HandshakeTransport, + ) -> Self { + Self { + io, + noise, + read_buffer: vec![ + 0u8; + max_read_ahead_factor * MAX_NOISE_MSG_LEN + (2 + MAX_NOISE_MSG_LEN) + ], + nread: 0usize, + offset: 0usize, + current_frame_size: None, + write_state: WriteState::Idle, + encrypt_buffer: vec![0u8; max_write_buffer_size * (MAX_NOISE_MSG_LEN + 2)], + decrypt_buffer: Some(vec![0u8; MAX_FRAME_LEN]), + read_state: ReadState::ReadData { + max_read: max_read_ahead_factor * MAX_NOISE_MSG_LEN, + }, + canonical_max_read: max_read_ahead_factor * MAX_NOISE_MSG_LEN, + peer, + ty, + } + } + + fn reset_read_state(&mut self, remaining: usize) { + match remaining { + 0 => { + self.nread = 0; + } + 1 => { + self.read_buffer[0] = self.read_buffer[self.nread - 1]; + self.nread = 1; + } + _ => panic!("invalid state"), + } + + self.offset = 0; + self.read_state = ReadState::ReadData { + max_read: self.canonical_max_read, + }; + } +} + +impl AsyncRead for NoiseSocket { + fn poll_read( + self: Pin<&mut Self>, + cx: &mut Context<'_>, + buf: &mut [u8], + ) -> Poll> { + let this = Pin::into_inner(self); + + loop { + match this.read_state { + ReadState::ReadData { max_read } => { + let nread = match Pin::new(&mut this.io) + .poll_read(cx, &mut this.read_buffer[this.nread..max_read]) + { + Poll::Pending => return Poll::Pending, + Poll::Ready(Err(error)) => return Poll::Ready(Err(error)), + Poll::Ready(Ok(nread)) => match nread == 0 { + true => return Poll::Ready(Err(io::ErrorKind::UnexpectedEof.into())), + false => nread, + }, + }; + + tracing::trace!( + target: LOG_TARGET, + ?nread, + ty = ?this.ty, + peer = ?this.peer, + "read data from socket" + ); + + this.nread += nread; + this.read_state = ReadState::ReadFrameLen; + } + ReadState::ReadFrameLen => { + let mut remaining = match this.nread.checked_sub(this.offset) { + Some(remaining) => remaining, + None => { + tracing::error!( + target: LOG_TARGET, + ty = ?this.ty, + peer = ?this.peer, + nread = ?this.nread, + offset = ?this.offset, + "offset is larger than the number of bytes read" + ); + return Poll::Ready(Err(io::ErrorKind::PermissionDenied.into())); + } + }; + + if remaining < 2 { + tracing::trace!( + target: LOG_TARGET, + ty = ?this.ty, + peer = ?this.peer, + "reset read buffer" + ); + this.reset_read_state(remaining); + continue; + } + + // get frame size, either from current or previous iteration + let frame_size = match this.current_frame_size.take() { + Some(frame_size) => frame_size, + None => { + let frame_size = (this.read_buffer[this.offset] as u16) << 8 + | this.read_buffer[this.offset + 1] as u16; + this.offset += 2; + remaining -= 2; + frame_size as usize + } + }; + + tracing::trace!( + target: LOG_TARGET, + ty = ?this.ty, + peer = ?this.peer, + "current frame size = {frame_size}" + ); + + if remaining < frame_size { + // `read_buffer` can fit the full frame size. + if this.nread + frame_size < this.canonical_max_read { + tracing::trace!( + target: LOG_TARGET, + ty = ?this.ty, + peer = ?this.peer, + max_size = ?this.canonical_max_read, + next_frame_size = ?(this.nread + frame_size), + "read buffer can fit the full frame", + ); + + this.current_frame_size = Some(frame_size); + this.read_state = ReadState::ReadData { + max_read: this.canonical_max_read, + }; + continue; + } + + tracing::trace!( + target: LOG_TARGET, + ty = ?this.ty, + peer = ?this.peer, + "use auxiliary buffer extension" + ); + + // use the auxiliary memory at the end of the read buffer for reading the + // frame + this.current_frame_size = Some(frame_size); + this.read_state = ReadState::ReadData { + max_read: this.nread + frame_size - remaining, + }; + continue; + } + + if frame_size <= NOISE_EXTRA_ENCRYPT_SPACE { + tracing::error!( + target: LOG_TARGET, + ty = ?this.ty, + peer = ?this.peer, + ?frame_size, + max_size = ?NOISE_EXTRA_ENCRYPT_SPACE, + "invalid frame size", + ); + return Poll::Ready(Err(io::ErrorKind::InvalidData.into())); + } + + this.current_frame_size = Some(frame_size); + this.read_state = ReadState::ProcessNextFrame { + pending: None, + offset: 0usize, + size: 0usize, + frame_size: 0usize, + }; + } + ReadState::ProcessNextFrame { + ref mut pending, + offset, + size, + frame_size, + } => match pending.take() { + Some(pending) => match buf.len() >= pending[offset..size].len() { + true => { + let copy_size = pending[offset..size].len(); + buf[..copy_size].copy_from_slice(&pending[offset..copy_size + offset]); + + this.read_state = ReadState::ReadFrameLen; + this.decrypt_buffer = Some(pending); + this.offset += frame_size; + return Poll::Ready(Ok(copy_size)); + } + false => { + buf.copy_from_slice(&pending[offset..buf.len() + offset]); + + this.read_state = ReadState::ProcessNextFrame { + pending: Some(pending), + offset: offset + buf.len(), + size, + frame_size, + }; + return Poll::Ready(Ok(buf.len())); + } + }, + None => { + let frame_size = + this.current_frame_size.take().expect("`frame_size` to exist"); + + match buf.len() >= frame_size - NOISE_EXTRA_ENCRYPT_SPACE { + true => match this.noise.read_message( + &this.read_buffer[this.offset..this.offset + frame_size], + buf, + ) { + Err(error) => { + tracing::error!( + target: LOG_TARGET, + ty = ?this.ty, + peer = ?this.peer, + buf_len = ?buf.len(), + frame_size = ?frame_size, + ?error, + "failed to decrypt message" + ); + + return Poll::Ready(Err(io::ErrorKind::InvalidData.into())); + } + Ok(nread) => { + this.offset += frame_size; + this.read_state = ReadState::ReadFrameLen; + return Poll::Ready(Ok(nread)); + } + }, + false => { + let mut buffer = + this.decrypt_buffer.take().expect("buffer to exist"); + + match this.noise.read_message( + &this.read_buffer[this.offset..this.offset + frame_size], + &mut buffer, + ) { + Err(error) => { + tracing::error!( + target: LOG_TARGET, + ty = ?this.ty, + peer = ?this.peer, + buf_len = ?buf.len(), + frame_size = ?frame_size, + ?error, + "failed to decrypt message for smaller buffer" + ); + + return Poll::Ready(Err(io::ErrorKind::InvalidData.into())); + } + Ok(nread) => { + buf.copy_from_slice(&buffer[..buf.len()]); + this.read_state = ReadState::ProcessNextFrame { + pending: Some(buffer), + offset: buf.len(), + size: nread, + frame_size, + }; + return Poll::Ready(Ok(buf.len())); + } + } + } + } + } + }, + } + } + } +} + +impl AsyncWrite for NoiseSocket { + fn poll_write( + self: Pin<&mut Self>, + cx: &mut Context<'_>, + buf: &[u8], + ) -> Poll> { + let this = Pin::into_inner(self); + + // Step 1. Attempt to drain any pending data. + if let WriteState::Writing { + offset, + encrypted_len, + } = &mut this.write_state + { + loop { + match Pin::new(&mut this.io) + .poll_write(cx, &this.encrypt_buffer[*offset..*encrypted_len]) + { + Poll::Ready(Ok(0)) => { + return Poll::Ready(Err(io::ErrorKind::WriteZero.into())); + } + Poll::Ready(Ok(n)) => { + *offset += n; + if offset == encrypted_len { + // Buffer fully drained! + this.write_state = WriteState::Idle; + break; + } + } + Poll::Ready(Err(e)) => return Poll::Ready(Err(e)), + Poll::Pending => { + // Socket is busy, move on to encryption. + break; + } + } + } + } + + // Step 2. Encrypt and buffer the new data. + let mut buffer_offset = match this.write_state { + WriteState::Idle => 0, + WriteState::Writing { encrypted_len, .. } => encrypted_len, + }; + // Nothing to do if there is no data to write. + if buf.is_empty() { + return Poll::Ready(Ok(0)); + } + + let mut total_plaintext = 0usize; + // Encrypt as many chunks as fit in the remaining space + for chunk in buf.chunks(MAX_FRAME_LEN) { + // Check space for this specific chunk + overhead + // Note: overhead is 2 bytes length + 16 bytes auth tag + let overhead = 2 + NOISE_EXTRA_ENCRYPT_SPACE; + if buffer_offset + chunk.len() + overhead > this.encrypt_buffer.len() { + // Buffer is full, stop packing + break; + } + + match this.noise.write_message(chunk, &mut this.encrypt_buffer[buffer_offset + 2..]) { + Ok(nwritten) => { + // Write frame length prefix + this.encrypt_buffer[buffer_offset] = (nwritten >> 8) as u8; + this.encrypt_buffer[buffer_offset + 1] = (nwritten & 0xff) as u8; + + buffer_offset += nwritten + 2; + total_plaintext += chunk.len(); + } + Err(error) => { + tracing::error!(target: LOG_TARGET, ?error, "failed to encrypt"); + return Poll::Ready(Err(io::ErrorKind::InvalidData.into())); + } + } + } + if total_plaintext == 0 { + // No data could be buffered because the buffer is full. + // + // This can only happen when we're in WriteState::Writing (buffer not empty). + // In step 1, the inner poll_write must have returned Pending (otherwise the + // buffer would have drained and we'd have space). That Pending registered + // the waker, so we'll be woken when the socket becomes writable again. + // + // This condition will always be satisfied, since the encrypted buffer + // is large enough (MAX_NOISE_MSG_LEN) to hold at least one chunk (MAX_FRAME_LEN) with + // overhead. + return Poll::Pending; + } + + // Step 3. Adjust state to writing and return number of bytes accepted. + // Without this step, we can cause higher-level panics in rust-yamux + // leading to unnecessary connection closures: + // - poll_write is called with buffer 512 bytes (we previously returned Pending but accepted + // and encrypted the buffer) + // - a future poll_write is called with a PONG frame (or smaller buffer) of 12 bytes + // - at this point we would have returned 512 from the previous call causing indexing out of + // bounds + + match this.write_state { + WriteState::Idle => { + this.write_state = WriteState::Writing { + offset: 0, + encrypted_len: buffer_offset, + }; + } + WriteState::Writing { + ref mut encrypted_len, + .. + } => { + *encrypted_len = buffer_offset; + } + } + + // We have successfully buffered the data: + // - poll_flush or next poll_write will drain it. + Poll::Ready(Ok(total_plaintext)) + } + + fn poll_flush(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll> { + let this = Pin::into_inner(self); + + // Flush internal buffer of encrypted messages + if let WriteState::Writing { + offset, + encrypted_len, + } = &mut this.write_state + { + loop { + match futures::ready!(Pin::new(&mut this.io) + .poll_write(cx, &this.encrypt_buffer[*offset..*encrypted_len])) + { + Ok(0) => return Poll::Ready(Err(io::ErrorKind::WriteZero.into())), + Ok(n) => { + *offset += n; + if offset == encrypted_len { + this.write_state = WriteState::Idle; + break; + } + } + Err(e) => return Poll::Ready(Err(e)), + } + } + } + + // Flush underlying socket + Pin::new(&mut this.io).poll_flush(cx) + } + + fn poll_close(mut self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll> { + // Ensure buffer is flushed before closing + futures::ready!(self.as_mut().poll_flush(cx))?; + + Pin::new(&mut self.io).poll_close(cx) + } +} + +/// Parse the `PeerId` from received `NoiseHandshakePayload` and verify the payload signature. +fn parse_and_verify_peer_id( + payload: handshake_schema::NoiseHandshakePayload, + dh_remote_pubkey: &[u8], +) -> Result { + let identity = payload.identity_key.ok_or(NegotiationError::PeerIdMissing)?; + let remote_public_key = RemotePublicKey::from_protobuf_encoding(&identity)?; + let remote_key_signature = + payload.identity_sig.ok_or(NegotiationError::BadSignature).inspect_err(|_err| { + tracing::debug!(target: LOG_TARGET, "payload without signature"); + })?; + + let peer_id = PeerId::from_public_key_protobuf(&identity); + + if !remote_public_key.verify( + &[STATIC_KEY_DOMAIN.as_bytes(), dh_remote_pubkey].concat(), + &remote_key_signature, + ) { + tracing::debug!( + target: LOG_TARGET, + ?peer_id, + "failed to verify remote public key signature" + ); + + return Err(NegotiationError::BadSignature); + } + + Ok(peer_id) +} + +/// The type of the transport used for the crypto/noise protocol. +/// +/// This is used for logging purposes. +#[derive(Debug, Clone, Copy, PartialEq, Eq)] +pub enum HandshakeTransport { + Tcp, + #[cfg(feature = "websocket")] + WebSocket, +} + +/// Perform Noise handshake. +pub async fn handshake( + mut io: S, + keypair: &Keypair, + role: Role, + max_read_ahead_factor: usize, + max_write_buffer_size: usize, + timeout: std::time::Duration, + ty: HandshakeTransport, +) -> Result<(NoiseSocket, PeerId), NegotiationError> { + let handle_handshake = async move { + tracing::debug!(target: LOG_TARGET, ?role, ?ty, "start noise handshake"); + + let mut noise = NoiseContext::new(keypair, role)?; + let payload = match role { + Role::Dialer => { + // write initial message + let first_message = noise.first_message(Role::Dialer)?; + io.write_all(&first_message).await?; + io.flush().await?; + + // read back response which contains the remote peer id + let message = noise.read_handshake_message(&mut io).await?; + // Decode the remote identity message. + let payload = handshake_schema::NoiseHandshakePayload::decode(message) + .map_err(ParseError::from) + .map_err(|err| { + tracing::error!(target: LOG_TARGET, ?err, ?ty, "failed to decode remote identity message"); + err + })?; + + // send the final message which contains local peer id + let second_message = noise.second_message()?; + io.write_all(&second_message).await?; + io.flush().await?; + + payload + } + Role::Listener => { + // read remote's first message + let _ = noise.read_handshake_message(&mut io).await?; + + // send local peer id. + let second_message = noise.second_message()?; + io.write_all(&second_message).await?; + io.flush().await?; + + // read remote's second message which contains their peer id + let message = noise.read_handshake_message(&mut io).await?; + // Decode the remote identity message. + handshake_schema::NoiseHandshakePayload::decode(message) + .map_err(ParseError::from)? + } + }; + + let dh_remote_pubkey = noise.get_handshake_dh_remote_pubkey()?; + let peer = parse_and_verify_peer_id(payload, dh_remote_pubkey)?; + + Ok(( + NoiseSocket::new( + io, + noise.into_transport()?, + max_read_ahead_factor, + max_write_buffer_size, + peer, + ty, + ), + peer, + )) + }; + + match tokio::time::timeout(timeout, handle_handshake).await { + Err(_) => Err(NegotiationError::Timeout), + Ok(result) => result, + } +} + +// TODO: https://github.com/paritytech/litep2p/issues/125 add more tests +#[cfg(test)] +mod tests { + use super::*; + use std::net::SocketAddr; + use tokio::net::{TcpListener, TcpStream}; + use tokio_util::compat::{TokioAsyncReadCompatExt, TokioAsyncWriteCompatExt}; + + #[tokio::test] + async fn noise_handshake() { + let _ = tracing_subscriber::fmt() + .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) + .try_init(); + + let keypair1 = Keypair::generate(); + let keypair2 = Keypair::generate(); + + let peer1_id = PeerId::from_public_key(&keypair1.public().into()); + let peer2_id = PeerId::from_public_key(&keypair2.public().into()); + + let listener = TcpListener::bind("[::1]:0".parse::().unwrap()).await.unwrap(); + + let (stream1, stream2) = tokio::join!( + TcpStream::connect(listener.local_addr().unwrap()), + listener.accept() + ); + let (io1, io2) = { + let io1 = TokioAsyncReadCompatExt::compat(stream1.unwrap()).into_inner(); + let io1 = Box::new(TokioAsyncWriteCompatExt::compat_write(io1)); + let io2 = TokioAsyncReadCompatExt::compat(stream2.unwrap().0).into_inner(); + let io2 = Box::new(TokioAsyncWriteCompatExt::compat_write(io2)); + + (io1, io2) + }; + + let (res1, res2) = tokio::join!( + handshake( + io1, + &keypair1, + Role::Dialer, + MAX_READ_AHEAD_FACTOR, + MAX_WRITE_BUFFER_SIZE, + std::time::Duration::from_secs(10), + HandshakeTransport::Tcp, + ), + handshake( + io2, + &keypair2, + Role::Listener, + MAX_READ_AHEAD_FACTOR, + MAX_WRITE_BUFFER_SIZE, + std::time::Duration::from_secs(10), + HandshakeTransport::Tcp, + ) + ); + let (mut res1, mut res2) = (res1.unwrap(), res2.unwrap()); + + assert_eq!(res1.1, peer2_id); + assert_eq!(res2.1, peer1_id); + + // verify the connection works by reading a string + let mut buf = vec![0u8; 512]; + + // Calling AsyncWrite::write, followed by AsyncRead::read_exact can + // cause deadlocks because the "AsyncWrite::write" does not guarantee + // flushing. Therefore, this is a misuse of the API. + let sent = res1.0.write(b"hello, world").await.unwrap(); + // Write ensures data reaches the buffers, flush ensures data is sent. + res1.0.flush().await.unwrap(); + + // At this point it is safe to read_exact. The test previously relied + // on the fact that `Noise::poll_write` would flush the data internally, + // causing head-of-line blocking and panics on different buffer sizes. + res2.0.read_exact(&mut buf[..sent]).await.unwrap(); + + assert_eq!(std::str::from_utf8(&buf[..sent]), Ok("hello, world")); + } + + #[test] + fn invalid_peer_id_schema() { + let payload = handshake_schema::NoiseHandshakePayload { + identity_key: Some(vec![1, 2, 3, 4]), + identity_sig: None, + extensions: None, + }; + match parse_and_verify_peer_id(payload, &[0]).unwrap_err() { + NegotiationError::ParseError(_) => {} + _ => panic!("invalid error"), + } + } + + /// Mock IO that returns Pending on first write, then Ready on subsequent writes + struct MockPendingIO { + write_count: usize, + buffer: Vec, + } + + impl MockPendingIO { + fn new() -> Self { + Self { + write_count: 0, + buffer: Vec::new(), + } + } + } + + impl AsyncRead for MockPendingIO { + fn poll_read( + self: Pin<&mut Self>, + _cx: &mut Context<'_>, + _buf: &mut [u8], + ) -> Poll> { + Poll::Ready(Ok(0)) + } + } + + impl AsyncWrite for MockPendingIO { + fn poll_write( + mut self: Pin<&mut Self>, + _cx: &mut Context<'_>, + buf: &[u8], + ) -> Poll> { + self.write_count += 1; + + // Return Pending on first write, Ready on subsequent writes + if self.write_count == 1 { + Poll::Pending + } else { + // Accept the write + self.buffer.extend_from_slice(buf); + Poll::Ready(Ok(buf.len())) + } + } + + fn poll_flush(self: Pin<&mut Self>, _cx: &mut Context<'_>) -> Poll> { + Poll::Ready(Ok(())) + } + + fn poll_close(self: Pin<&mut Self>, _cx: &mut Context<'_>) -> Poll> { + Poll::Ready(Ok(())) + } + } + + #[tokio::test] + async fn test_poll_write_wrong_size_panic() { + let _ = tracing_subscriber::fmt() + .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) + .try_init(); + + let keypair1 = Keypair::generate(); + let keypair2 = Keypair::generate(); + + let peer1_id = PeerId::from_public_key(&keypair1.public().into()); + let peer2_id = PeerId::from_public_key(&keypair2.public().into()); + + let listener = TcpListener::bind("[::1]:0".parse::().unwrap()).await.unwrap(); + + let (stream1, stream2) = tokio::join!( + TcpStream::connect(listener.local_addr().unwrap()), + listener.accept() + ); + let (io1, io2) = { + let io1 = TokioAsyncReadCompatExt::compat(stream1.unwrap()).into_inner(); + let io1 = Box::new(TokioAsyncWriteCompatExt::compat_write(io1)); + let io2 = TokioAsyncReadCompatExt::compat(stream2.unwrap().0).into_inner(); + let io2 = Box::new(TokioAsyncWriteCompatExt::compat_write(io2)); + + (io1, io2) + }; + + // Perform handshake + let (res1, res2) = tokio::join!( + handshake( + io1, + &keypair1, + Role::Dialer, + MAX_READ_AHEAD_FACTOR, + MAX_WRITE_BUFFER_SIZE, + std::time::Duration::from_secs(10), + HandshakeTransport::Tcp, + ), + handshake( + io2, + &keypair2, + Role::Listener, + MAX_READ_AHEAD_FACTOR, + MAX_WRITE_BUFFER_SIZE, + std::time::Duration::from_secs(10), + HandshakeTransport::Tcp, + ) + ); + let (socket1, peer1) = res1.unwrap(); + let (_socket2, peer2) = res2.unwrap(); + + assert_eq!(peer1, peer2_id); + assert_eq!(peer2, peer1_id); + + // Wrap socket with MockPendingIO + let mock_io = MockPendingIO::new(); + let mut noise_socket = NoiseSocket::new( + mock_io, + socket1.noise, + MAX_READ_AHEAD_FACTOR, + MAX_WRITE_BUFFER_SIZE, + peer1, + HandshakeTransport::Tcp, + ); + + // First write with 512 bytes - this will encrypt data, buffer it and return Ok(512) + // However, the data is not yet flushed to the underlying IO. + let large_buffer = vec![0xAA; 512]; + let waker = futures::task::noop_waker(); + let mut cx = Context::from_waker(&waker); + + match Pin::new(&mut noise_socket).poll_write(&mut cx, &large_buffer) { + Poll::Ready(Ok(n)) if n == 512 => {} + state => panic!("Expected Ok(512), got {:?}", state), + } + + // Second write with 12 bytes (PONG frame). + // This previously flushes the first write and returned 512 instead of 12, causing a panic + // to rust-yamux when indexing the buffer. + // With the new implementation this will: flush any pending data (from first write), and + // then encrypt the small buffer. + let small_buffer = vec![0xBB; 12]; + match Pin::new(&mut noise_socket).poll_write(&mut cx, &small_buffer) { + Poll::Ready(Ok(n)) => { + println!( + "poll_write returned {} bytes, but buffer is only {} bytes", + n, + small_buffer.len() + ); + + // Safe to reference since the exact length is returned. + let _ = &small_buffer[n..]; + } + Poll::Pending => panic!("Expected Ready, got Pending"), + Poll::Ready(Err(e)) => panic!("Expected Ready, got error: {}", e), + } + } +} diff --git a/client/litep2p/src/crypto/noise/protocol.rs b/client/litep2p/src/crypto/noise/protocol.rs new file mode 100644 index 00000000..59e95ecc --- /dev/null +++ b/client/litep2p/src/crypto/noise/protocol.rs @@ -0,0 +1,124 @@ +// Copyright 2019 Parity Technologies (UK) Ltd. +// +// Permission is hereby granted, free of charge, to any person obtaining a +// copy of this software and associated documentation files (the "Software"), +// to deal in the Software without restriction, including without limitation +// the rights to use, copy, modify, merge, publish, distribute, sublicense, +// and/or sell copies of the Software, and to permit persons to whom the +// Software is furnished to do so, subject to the following conditions: +// +// The above copyright notice and this permission notice shall be included in +// all copies or substantial portions of the Software. +// +// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS +// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE +// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER +// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING +// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER +// DEALINGS IN THE SOFTWARE. + +use crate::crypto::noise::x25519_spec; + +use rand::SeedableRng; +use zeroize::Zeroize; + +/// DH keypair. +#[derive(Clone)] +pub struct Keypair { + pub secret: SecretKey, + pub public: PublicKey, +} + +/// DH secret key. +#[derive(Clone)] +pub struct SecretKey(pub T); + +impl Drop for SecretKey { + fn drop(&mut self) { + self.0.zeroize() + } +} + +impl + Zeroize> AsRef<[u8]> for SecretKey { + fn as_ref(&self) -> &[u8] { + self.0.as_ref() + } +} + +/// DH public key. +#[derive(Clone)] +pub struct PublicKey(pub T); + +impl> PartialEq for PublicKey { + fn eq(&self, other: &PublicKey) -> bool { + self.as_ref() == other.as_ref() + } +} + +impl> Eq for PublicKey {} + +impl> AsRef<[u8]> for PublicKey { + fn as_ref(&self) -> &[u8] { + self.0.as_ref() + } +} + +/// Custom `snow::CryptoResolver` which delegates to either the +/// `RingResolver` on native or the `DefaultResolver` on wasm +/// for hash functions and symmetric ciphers, while using x25519-dalek +/// for Curve25519 DH. +pub struct Resolver; + +impl snow::resolvers::CryptoResolver for Resolver { + fn resolve_rng(&self) -> Option> { + Some(Box::new(Rng(rand::rngs::StdRng::from_entropy()))) + } + + fn resolve_dh(&self, choice: &snow::params::DHChoice) -> Option> { + if let snow::params::DHChoice::Curve25519 = choice { + Some(Box::new(Keypair::::default())) + } else { + None + } + } + + fn resolve_hash( + &self, + choice: &snow::params::HashChoice, + ) -> Option> { + snow::resolvers::RingResolver.resolve_hash(choice) + } + + fn resolve_cipher( + &self, + choice: &snow::params::CipherChoice, + ) -> Option> { + snow::resolvers::RingResolver.resolve_cipher(choice) + } +} + +/// Wrapper around a CSPRNG to implement `snow::Random` trait for. +struct Rng(rand::rngs::StdRng); + +impl rand::RngCore for Rng { + fn next_u32(&mut self) -> u32 { + self.0.next_u32() + } + + fn next_u64(&mut self) -> u64 { + self.0.next_u64() + } + + fn fill_bytes(&mut self, dest: &mut [u8]) { + self.0.fill_bytes(dest) + } + + fn try_fill_bytes(&mut self, dest: &mut [u8]) -> Result<(), rand::Error> { + self.0.try_fill_bytes(dest) + } +} + +impl rand::CryptoRng for Rng {} + +impl snow::types::Random for Rng {} diff --git a/client/litep2p/src/crypto/noise/x25519_spec.rs b/client/litep2p/src/crypto/noise/x25519_spec.rs new file mode 100644 index 00000000..2c87864d --- /dev/null +++ b/client/litep2p/src/crypto/noise/x25519_spec.rs @@ -0,0 +1,117 @@ +// Copyright 2019 Parity Technologies (UK) Ltd. +// +// Permission is hereby granted, free of charge, to any person obtaining a +// copy of this software and associated documentation files (the "Software"), +// to deal in the Software without restriction, including without limitation +// the rights to use, copy, modify, merge, publish, distribute, sublicense, +// and/or sell copies of the Software, and to permit persons to whom the +// Software is furnished to do so, subject to the following conditions: +// +// The above copyright notice and this permission notice shall be included in +// all copies or substantial portions of the Software. +// +// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS +// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE +// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER +// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING +// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER +// DEALINGS IN THE SOFTWARE. + +use rand::Rng; +use x25519_dalek::{x25519, X25519_BASEPOINT_BYTES}; +use zeroize::Zeroize; + +use crate::crypto::noise::protocol::{Keypair, PublicKey, SecretKey}; + +/// A X25519 key. +#[derive(Clone)] +pub struct X25519Spec([u8; 32]); + +impl AsRef<[u8]> for X25519Spec { + fn as_ref(&self) -> &[u8] { + self.0.as_ref() + } +} + +impl Zeroize for X25519Spec { + fn zeroize(&mut self) { + self.0.zeroize() + } +} + +impl Keypair { + /// An "empty" keypair as a starting state for DH computations in `snow`, + /// which get manipulated through the `snow::types::Dh` interface. + pub(super) fn default() -> Self { + Keypair { + secret: SecretKey(X25519Spec([0u8; 32])), + public: PublicKey(X25519Spec([0u8; 32])), + } + } + + /// Create a new X25519 keypair. + pub fn new() -> Keypair { + let mut sk_bytes = [0u8; 32]; + rand::thread_rng().fill(&mut sk_bytes); + let sk = SecretKey(X25519Spec(sk_bytes)); // Copy + sk_bytes.zeroize(); + Self::from(sk) + } +} + +impl Default for Keypair { + fn default() -> Self { + Self::new() + } +} + +/// Promote a X25519 secret key into a keypair. +impl From> for Keypair { + fn from(secret: SecretKey) -> Keypair { + let public = PublicKey(X25519Spec(x25519((secret.0).0, X25519_BASEPOINT_BYTES))); + Keypair { secret, public } + } +} + +impl snow::types::Dh for Keypair { + fn name(&self) -> &'static str { + "25519" + } + fn pub_len(&self) -> usize { + 32 + } + fn priv_len(&self) -> usize { + 32 + } + fn pubkey(&self) -> &[u8] { + self.public.as_ref() + } + fn privkey(&self) -> &[u8] { + self.secret.as_ref() + } + + fn set(&mut self, sk: &[u8]) { + let mut secret = [0u8; 32]; + secret.copy_from_slice(sk); + self.secret = SecretKey(X25519Spec(secret)); + self.public = PublicKey(X25519Spec(x25519(secret, X25519_BASEPOINT_BYTES))); + secret.zeroize(); + } + + fn generate(&mut self, rng: &mut dyn snow::types::Random) { + let mut secret = [0u8; 32]; + rng.fill_bytes(&mut secret); + self.secret = SecretKey(X25519Spec(secret)); + self.public = PublicKey(X25519Spec(x25519(secret, X25519_BASEPOINT_BYTES))); + secret.zeroize(); + } + + fn dh(&self, pk: &[u8], shared_secret: &mut [u8]) -> Result<(), snow::Error> { + let mut p = [0; 32]; + p.copy_from_slice(&pk[..32]); + let ss = x25519((self.secret.0).0, p); + shared_secret[..32].copy_from_slice(&ss[..]); + Ok(()) + } +} diff --git a/client/litep2p/src/crypto/rsa.rs b/client/litep2p/src/crypto/rsa.rs new file mode 100644 index 00000000..96108181 --- /dev/null +++ b/client/litep2p/src/crypto/rsa.rs @@ -0,0 +1,44 @@ +// Copyright 2025 litep2p developers +// +// Permission is hereby granted, free of charge, to any person obtaining a +// copy of this software and associated documentation files (the "Software"), +// to deal in the Software without restriction, including without limitation +// the rights to use, copy, modify, merge, publish, distribute, sublicense, +// and/or sell copies of the Software, and to permit persons to whom the +// Software is furnished to do so, subject to the following conditions: +// +// The above copyright notice and this permission notice shall be included in +// all copies or substantial portions of the Software. +// +// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS +// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE +// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER +// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING +// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER +// DEALINGS IN THE SOFTWARE. + +//! RSA public key. + +use crate::error::ParseError; +use ring::signature::{UnparsedPublicKey, RSA_PKCS1_2048_8192_SHA256}; +use x509_parser::{prelude::FromDer, x509::SubjectPublicKeyInfo}; + +/// An RSA public key. +#[derive(Clone, Debug, PartialEq, Eq)] +pub struct PublicKey(Vec); + +impl PublicKey { + /// Decode an RSA public key from a DER-encoded X.509 SubjectPublicKeyInfo structure. + pub fn try_decode_x509(spki: &[u8]) -> Result { + SubjectPublicKeyInfo::from_der(spki) + .map(|(_, spki)| Self(spki.subject_public_key.as_ref().to_vec())) + .map_err(|_| ParseError::InvalidPublicKey) + } + + /// Verify the RSA signature on a message using the public key. + pub fn verify(&self, msg: &[u8], sig: &[u8]) -> bool { + let key = UnparsedPublicKey::new(&RSA_PKCS1_2048_8192_SHA256, &self.0); + key.verify(msg, sig).is_ok() + } +} diff --git a/client/litep2p/src/crypto/tls/certificate.rs b/client/litep2p/src/crypto/tls/certificate.rs new file mode 100644 index 00000000..853534ee --- /dev/null +++ b/client/litep2p/src/crypto/tls/certificate.rs @@ -0,0 +1,534 @@ +// Copyright 2021 Parity Technologies (UK) Ltd. +// +// Permission is hereby granted, free of charge, to any person obtaining a +// copy of this software and associated documentation files (the "Software"), +// to deal in the Software without restriction, including without limitation +// the rights to use, copy, modify, merge, publish, distribute, sublicense, +// and/or sell copies of the Software, and to permit persons to whom the +// Software is furnished to do so, subject to the following conditions: +// +// The above copyright notice and this permission notice shall be included in +// all copies or substantial portions of the Software. +// +// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS +// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE +// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER +// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING +// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER +// DEALINGS IN THE SOFTWARE. + +//! X.509 certificate handling for libp2p +//! +//! This module handles generation, signing, and verification of certificates. + +use crate::{ + crypto::{ed25519::Keypair, RemotePublicKey}, + PeerId, +}; + +// use libp2p_identity as identity; +// use libp2p_identity::PeerId; +use x509_parser::{prelude::*, signature_algorithm::SignatureAlgorithm}; + +/// The libp2p Public Key Extension is a X.509 extension +/// with the Object Identier 1.3.6.1.4.1.53594.1.1, +/// allocated by IANA to the libp2p project at Protocol Labs. +const P2P_EXT_OID: [u64; 9] = [1, 3, 6, 1, 4, 1, 53594, 1, 1]; + +/// The peer signs the concatenation of the string `libp2p-tls-handshake:` +/// and the public key that it used to generate the certificate carrying +/// the libp2p Public Key Extension, using its private host key. +/// This signature provides cryptographic proof that the peer was +/// in possession of the private host key at the time the certificate was signed. +const P2P_SIGNING_PREFIX: [u8; 21] = *b"libp2p-tls-handshake:"; + +// Certificates MUST use the NamedCurve encoding for elliptic curve parameters. +// Similarly, hash functions with an output length less than 256 bits MUST NOT be used. +static P2P_SIGNATURE_ALGORITHM: &rcgen::SignatureAlgorithm = &rcgen::PKCS_ECDSA_P256_SHA256; + +/// Generates a self-signed TLS certificate that includes a libp2p-specific +/// certificate extension containing the public key of the given keypair. +pub fn generate( + identity_keypair: &Keypair, +) -> Result<(rustls::Certificate, rustls::PrivateKey), GenError> { + // Keypair used to sign the certificate. + // SHOULD NOT be related to the host's key. + // Endpoints MAY generate a new key and certificate + // for every connection attempt, or they MAY reuse the same key + // and certificate for multiple connections. + let certificate_keypair = rcgen::KeyPair::generate_for(P2P_SIGNATURE_ALGORITHM)?; + let rustls_key = rustls::PrivateKey(certificate_keypair.serialize_der()); + + let certificate = { + let mut params = rcgen::CertificateParams::new(vec![])?; + params.distinguished_name = rcgen::DistinguishedName::new(); + params.custom_extensions.push(make_libp2p_extension( + identity_keypair, + &certificate_keypair, + )?); + params.self_signed(&certificate_keypair)? + }; + + let rustls_certificate = rustls::Certificate(certificate.der().to_vec()); + + Ok((rustls_certificate, rustls_key)) +} + +/// Attempts to parse the provided bytes as a [`P2pCertificate`]. +/// +/// For this to succeed, the certificate must contain the specified extension and the signature must +/// match the embedded public key. +pub fn parse(certificate: &rustls::Certificate) -> Result, ParseError> { + let certificate = parse_unverified(certificate.as_ref())?; + + certificate.verify()?; + + Ok(certificate) +} + +/// An X.509 certificate with a libp2p-specific extension +/// is used to secure libp2p connections. +pub struct P2pCertificate<'a> { + certificate: X509Certificate<'a>, + /// This is a specific libp2p Public Key Extension with two values: + /// * the public host key + /// * a signature performed using the private host key + extension: P2pExtension, +} + +/// The contents of the specific libp2p extension, containing the public host key +/// and a signature performed using the private host key. +pub struct P2pExtension { + public_key: RemotePublicKey, + /// This signature provides cryptographic proof that the peer was + /// in possession of the private host key at the time the certificate was signed. + signature: Vec, + /// PeerId derived from the public key. While not being part of the extension, we store it to + /// avoid the need to serialize the public key back to protobuf. + peer_id: PeerId, +} + +#[derive(Debug, thiserror::Error)] +#[error(transparent)] +pub struct GenError(#[from] rcgen::Error); + +#[derive(Debug, thiserror::Error)] +#[error(transparent)] +pub struct ParseError(#[from] pub(crate) webpki::Error); + +#[derive(Debug, thiserror::Error)] +#[error(transparent)] +pub struct VerificationError(#[from] pub(crate) webpki::Error); + +/// Internal function that only parses but does not verify the certificate. +/// +/// Useful for testing but unsuitable for production. +fn parse_unverified<'a>(der_input: &'a [u8]) -> Result, webpki::Error> { + let x509 = X509Certificate::from_der(der_input) + .map(|(_rest_input, x509)| x509) + .map_err(|_| webpki::Error::BadDer)?; + + let p2p_ext_oid = der_parser::oid::Oid::from(&P2P_EXT_OID) + .expect("This is a valid OID of p2p extension; qed"); + + let mut libp2p_extension = None; + + for ext in x509.extensions() { + let oid = &ext.oid; + if oid == &p2p_ext_oid && libp2p_extension.is_some() { + // The extension was already parsed + return Err(webpki::Error::BadDer); + } + + if oid == &p2p_ext_oid { + // The public host key and the signature are ANS.1-encoded + // into the SignedKey data structure, which is carried + // in the libp2p Public Key Extension. + // SignedKey ::= SEQUENCE { + // publicKey OCTET STRING, + // signature OCTET STRING + // } + let (public_key_protobuf, signature): (Vec, Vec) = + yasna::decode_der(ext.value).map_err(|_| webpki::Error::ExtensionValueInvalid)?; + // The publicKey field of SignedKey contains the public host key + // of the endpoint, encoded using the following protobuf: + // enum KeyType { + // RSA = 0; + // Ed25519 = 1; + // Secp256k1 = 2; + // ECDSA = 3; + // } + // message PublicKey { + // required KeyType Type = 1; + // required bytes Data = 2; + // } + let public_key = RemotePublicKey::from_protobuf_encoding(&public_key_protobuf) + .map_err(|_| webpki::Error::UnknownIssuer)?; + let peer_id = PeerId::from_public_key_protobuf(&public_key_protobuf); + let ext = P2pExtension { + public_key, + signature, + peer_id, + }; + libp2p_extension = Some(ext); + continue; + } + + if ext.critical { + // Endpoints MUST abort the connection attempt if the certificate + // contains critical extensions that the endpoint does not understand. + return Err(webpki::Error::UnsupportedCriticalExtension); + } + + // Implementations MUST ignore non-critical extensions with unknown OIDs. + } + + // The certificate MUST contain the libp2p Public Key Extension. + // If this extension is missing, endpoints MUST abort the connection attempt. + let extension = libp2p_extension.ok_or(webpki::Error::BadDer)?; + + let certificate = P2pCertificate { + certificate: x509, + extension, + }; + + Ok(certificate) +} + +fn make_libp2p_extension( + identity_keypair: &Keypair, + certificate_pubkey: &impl rcgen::PublicKeyData, +) -> Result { + // The peer signs the concatenation of the string `libp2p-tls-handshake:` + // and the public key (in SPKI DER format) that it used to generate the certificate carrying + // the libp2p Public Key Extension, using its private host key. + let signature = { + let mut msg = vec![]; + msg.extend(P2P_SIGNING_PREFIX); + msg.extend(certificate_pubkey.subject_public_key_info()); + + identity_keypair.sign(&msg) + }; + + // The public host key and the signature are ANS.1-encoded + // into the SignedKey data structure, which is carried + // in the libp2p Public Key Extension. + // SignedKey ::= SEQUENCE { + // publicKey OCTET STRING, + // signature OCTET STRING + // } + let extension_content = { + let serialized_pubkey = + crate::crypto::PublicKey::Ed25519(identity_keypair.public()).to_protobuf_encoding(); + yasna::encode_der(&(serialized_pubkey, signature)) + }; + + // This extension MAY be marked critical. + let mut ext = rcgen::CustomExtension::from_oid_content(&P2P_EXT_OID, extension_content); + ext.set_criticality(true); + + Ok(ext) +} + +impl P2pCertificate<'_> { + /// The [`PeerId`] of the remote peer. + pub fn peer_id(&self) -> PeerId { + self.extension.peer_id + } + + /// Verify the `signature` of the `message` signed by the private key corresponding to the + /// public key stored in the certificate. + pub fn verify_signature( + &self, + signature_scheme: rustls::SignatureScheme, + message: &[u8], + signature: &[u8], + ) -> Result<(), VerificationError> { + let pk = self.public_key(signature_scheme)?; + pk.verify(message, signature) + .map_err(|_| webpki::Error::InvalidSignatureForPublicKey)?; + + Ok(()) + } + + /// Get a [`ring::signature::UnparsedPublicKey`] for this `signature_scheme`. + /// Return `Error` if the `signature_scheme` does not match the public key signature + /// and hashing algorithm or if the `signature_scheme` is not supported. + fn public_key( + &self, + signature_scheme: rustls::SignatureScheme, + ) -> Result, webpki::Error> { + use ring::signature; + use rustls::SignatureScheme::*; + + let current_signature_scheme = self.signature_scheme()?; + if signature_scheme != current_signature_scheme { + // This certificate was signed with a different signature scheme + return Err(webpki::Error::UnsupportedSignatureAlgorithmForPublicKey); + } + + let verification_algorithm: &dyn signature::VerificationAlgorithm = match signature_scheme { + RSA_PKCS1_SHA256 => &signature::RSA_PKCS1_2048_8192_SHA256, + RSA_PKCS1_SHA384 => &signature::RSA_PKCS1_2048_8192_SHA384, + RSA_PKCS1_SHA512 => &signature::RSA_PKCS1_2048_8192_SHA512, + ECDSA_NISTP256_SHA256 => &signature::ECDSA_P256_SHA256_ASN1, + ECDSA_NISTP384_SHA384 => &signature::ECDSA_P384_SHA384_ASN1, + ECDSA_NISTP521_SHA512 => { + // See https://github.com/briansmith/ring/issues/824 + return Err(webpki::Error::UnsupportedSignatureAlgorithm); + } + RSA_PSS_SHA256 => &signature::RSA_PSS_2048_8192_SHA256, + RSA_PSS_SHA384 => &signature::RSA_PSS_2048_8192_SHA384, + RSA_PSS_SHA512 => &signature::RSA_PSS_2048_8192_SHA512, + ED25519 => &signature::ED25519, + ED448 => { + // See https://github.com/briansmith/ring/issues/463 + return Err(webpki::Error::UnsupportedSignatureAlgorithm); + } + // Similarly, hash functions with an output length less than 256 bits + // MUST NOT be used, due to the possibility of collision attacks. + // In particular, MD5 and SHA1 MUST NOT be used. + RSA_PKCS1_SHA1 => return Err(webpki::Error::UnsupportedSignatureAlgorithm), + ECDSA_SHA1_Legacy => return Err(webpki::Error::UnsupportedSignatureAlgorithm), + Unknown(_) => return Err(webpki::Error::UnsupportedSignatureAlgorithm), + }; + let spki = &self.certificate.tbs_certificate.subject_pki; + let key = signature::UnparsedPublicKey::new( + verification_algorithm, + spki.subject_public_key.as_ref(), + ); + + Ok(key) + } + + /// This method validates the certificate according to libp2p TLS 1.3 specs. + /// The certificate MUST: + /// 1. be valid at the time it is received by the peer; + /// 2. use the NamedCurve encoding; + /// 3. use hash functions with an output length not less than 256 bits; + /// 4. be self signed; + /// 5. contain a valid signature in the specific libp2p extension. + fn verify(&self) -> Result<(), webpki::Error> { + use webpki::Error; + // The certificate MUST have NotBefore and NotAfter fields set + // such that the certificate is valid at the time it is received by the peer. + if !self.certificate.validity().is_valid() { + return Err(Error::InvalidCertValidity); + } + + // Certificates MUST use the NamedCurve encoding for elliptic curve parameters. + // Similarly, hash functions with an output length less than 256 bits + // MUST NOT be used, due to the possibility of collision attacks. + // In particular, MD5 and SHA1 MUST NOT be used. + // Endpoints MUST abort the connection attempt if it is not used. + let signature_scheme = self.signature_scheme()?; + // Endpoints MUST abort the connection attempt if the certificate’s + // self-signature is not valid. + let raw_certificate = self.certificate.tbs_certificate.as_ref(); + let signature = self.certificate.signature_value.as_ref(); + // check if self signed + self.verify_signature(signature_scheme, raw_certificate, signature) + .map_err(|_| Error::SignatureAlgorithmMismatch)?; + + let subject_pki = self.certificate.public_key().raw; + + // The peer signs the concatenation of the string `libp2p-tls-handshake:` + // and the public key that it used to generate the certificate carrying + // the libp2p Public Key Extension, using its private host key. + let mut msg = vec![]; + msg.extend(P2P_SIGNING_PREFIX); + msg.extend(subject_pki); + + // This signature provides cryptographic proof that the peer was in possession + // of the private host key at the time the certificate was signed. + // Peers MUST verify the signature, and abort the connection attempt + // if signature verification fails. + let user_owns_sk = self.extension.public_key.verify(&msg, &self.extension.signature); + if !user_owns_sk { + return Err(Error::UnknownIssuer); + } + + Ok(()) + } + + /// Return the signature scheme corresponding to [`AlgorithmIdentifier`]s + /// of `subject_pki` and `signature_algorithm` + /// according to . + fn signature_scheme(&self) -> Result { + // Certificates MUST use the NamedCurve encoding for elliptic curve parameters. + // Endpoints MUST abort the connection attempt if it is not used. + use oid_registry::*; + use rustls::SignatureScheme::*; + + let signature_algorithm = &self.certificate.signature_algorithm; + let pki_algorithm = &self.certificate.tbs_certificate.subject_pki.algorithm; + + if pki_algorithm.algorithm == OID_PKCS1_RSAENCRYPTION { + if signature_algorithm.algorithm == OID_PKCS1_SHA256WITHRSA { + return Ok(RSA_PKCS1_SHA256); + } + if signature_algorithm.algorithm == OID_PKCS1_SHA384WITHRSA { + return Ok(RSA_PKCS1_SHA384); + } + if signature_algorithm.algorithm == OID_PKCS1_SHA512WITHRSA { + return Ok(RSA_PKCS1_SHA512); + } + if signature_algorithm.algorithm == OID_PKCS1_RSASSAPSS { + // According to https://datatracker.ietf.org/doc/html/rfc4055#section-3.1: + // Inside of params there shuld be a sequence of: + // - Hash Algorithm + // - Mask Algorithm + // - Salt Length + // - Trailer Field + + // We are interested in Hash Algorithm only + + if let Ok(SignatureAlgorithm::RSASSA_PSS(params)) = + SignatureAlgorithm::try_from(signature_algorithm) + { + let hash_oid = params.hash_algorithm_oid(); + if hash_oid == &OID_NIST_HASH_SHA256 { + return Ok(RSA_PSS_SHA256); + } + if hash_oid == &OID_NIST_HASH_SHA384 { + return Ok(RSA_PSS_SHA384); + } + if hash_oid == &OID_NIST_HASH_SHA512 { + return Ok(RSA_PSS_SHA512); + } + } + + // Default hash algo is SHA-1, however: + // In particular, MD5 and SHA1 MUST NOT be used. + return Err(webpki::Error::UnsupportedSignatureAlgorithm); + } + } + + if pki_algorithm.algorithm == OID_KEY_TYPE_EC_PUBLIC_KEY { + let signature_param = pki_algorithm + .parameters + .as_ref() + .ok_or(webpki::Error::BadDer)? + .as_oid() + .map_err(|_| webpki::Error::BadDer)?; + if signature_param == OID_EC_P256 + && signature_algorithm.algorithm == OID_SIG_ECDSA_WITH_SHA256 + { + return Ok(ECDSA_NISTP256_SHA256); + } + if signature_param == OID_NIST_EC_P384 + && signature_algorithm.algorithm == OID_SIG_ECDSA_WITH_SHA384 + { + return Ok(ECDSA_NISTP384_SHA384); + } + if signature_param == OID_NIST_EC_P521 + && signature_algorithm.algorithm == OID_SIG_ECDSA_WITH_SHA512 + { + return Ok(ECDSA_NISTP521_SHA512); + } + return Err(webpki::Error::UnsupportedSignatureAlgorithm); + } + + if signature_algorithm.algorithm == OID_SIG_ED25519 { + return Ok(ED25519); + } + if signature_algorithm.algorithm == OID_SIG_ED448 { + return Ok(ED448); + } + + Err(webpki::Error::UnsupportedSignatureAlgorithm) + } +} + +#[cfg(test)] +mod tests { + use super::*; + use hex_literal::hex; + + #[test] + fn sanity_check() { + // let keypair = identity::Keypair::generate_ed25519(); + let keypair = crate::crypto::ed25519::Keypair::generate(); + + let (cert, _) = generate(&keypair).unwrap(); + let parsed_cert = parse(&cert).unwrap(); + + assert!(parsed_cert.verify().is_ok()); + assert_eq!( + crate::crypto::RemotePublicKey::Ed25519(keypair.public()), + parsed_cert.extension.public_key + ); + } + + macro_rules! check_cert { + ($name:ident, $path:literal, $scheme:path) => { + #[test] + fn $name() { + let cert: &[u8] = include_bytes!($path); + + let cert = parse_unverified(cert).unwrap(); + assert!(cert.verify().is_err()); // Because p2p extension + // was not signed with the private key + // of the certificate. + assert_eq!(cert.signature_scheme(), Ok($scheme)); + } + }; + } + + check_cert! {ed448, "./test_assets/ed448.der", rustls::SignatureScheme::ED448} + check_cert! {ed25519, "./test_assets/ed25519.der", rustls::SignatureScheme::ED25519} + check_cert! {rsa_pkcs1_sha256, "./test_assets/rsa_pkcs1_sha256.der", rustls::SignatureScheme::RSA_PKCS1_SHA256} + check_cert! {rsa_pkcs1_sha384, "./test_assets/rsa_pkcs1_sha384.der", rustls::SignatureScheme::RSA_PKCS1_SHA384} + check_cert! {rsa_pkcs1_sha512, "./test_assets/rsa_pkcs1_sha512.der", rustls::SignatureScheme::RSA_PKCS1_SHA512} + check_cert! {nistp256_sha256, "./test_assets/nistp256_sha256.der", rustls::SignatureScheme::ECDSA_NISTP256_SHA256} + check_cert! {nistp384_sha384, "./test_assets/nistp384_sha384.der", rustls::SignatureScheme::ECDSA_NISTP384_SHA384} + check_cert! {nistp521_sha512, "./test_assets/nistp521_sha512.der", rustls::SignatureScheme::ECDSA_NISTP521_SHA512} + + #[test] + fn rsa_pss_sha384() { + let cert = rustls::Certificate(include_bytes!("./test_assets/rsa_pss_sha384.der").to_vec()); + + let cert = parse(&cert).unwrap(); + + assert_eq!( + cert.signature_scheme(), + Ok(rustls::SignatureScheme::RSA_PSS_SHA384) + ); + } + + #[test] + fn nistp384_sha256() { + let cert: &[u8] = include_bytes!("./test_assets/nistp384_sha256.der"); + + let cert = parse_unverified(cert).unwrap(); + + assert!(cert.signature_scheme().is_err()); + } + + #[test] + fn can_parse_certificate_with_ed25519_keypair() { + let certificate = rustls::Certificate(hex!("308201773082011ea003020102020900f5bd0debaa597f52300a06082a8648ce3d04030230003020170d3735303130313030303030305a180f34303936303130313030303030305a30003059301306072a8648ce3d020106082a8648ce3d030107034200046bf9871220d71dcb3483ecdfcbfcc7c103f8509d0974b3c18ab1f1be1302d643103a08f7a7722c1b247ba3876fe2c59e26526f479d7718a85202ddbe47562358a37f307d307b060a2b0601040183a25a01010101ff046a30680424080112207fda21856709c5ae12fd6e8450623f15f11955d384212b89f56e7e136d2e17280440aaa6bffabe91b6f30c35e3aa4f94b1188fed96b0ffdd393f4c58c1c047854120e674ce64c788406d1c2c4b116581fd7411b309881c3c7f20b46e54c7e6fe7f0f300a06082a8648ce3d040302034700304402207d1a1dbd2bda235ff2ec87daf006f9b04ba076a5a5530180cd9c2e8f6399e09d0220458527178c7e77024601dbb1b256593e9b96d961b96349d1f560114f61a87595").to_vec()); + + let peer_id = parse(&certificate).unwrap().peer_id(); + + assert_eq!( + "12D3KooWJRSrypvnpHgc6ZAgyCni4KcSmbV7uGRaMw5LgMKT18fq" + .parse::() + .unwrap(), + peer_id + ); + } + + #[test] + fn fails_to_parse_bad_certificate_with_ed25519_keypair() { + let certificate = rustls::Certificate(hex!("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").to_vec()); + + match parse(&certificate) { + Ok(_) => assert!(false), + Err(error) => { + assert_eq!(format!("{error}"), "UnknownIssuer"); + } + } + } +} diff --git a/client/litep2p/src/crypto/tls/mod.rs b/client/litep2p/src/crypto/tls/mod.rs new file mode 100644 index 00000000..e19976ae --- /dev/null +++ b/client/litep2p/src/crypto/tls/mod.rs @@ -0,0 +1,76 @@ +// Copyright 2021 Parity Technologies (UK) Ltd. +// Copyright 2022 Protocol Labs. +// +// Permission is hereby granted, free of charge, to any person obtaining a +// copy of this software and associated documentation files (the "Software"), +// to deal in the Software without restriction, including without limitation +// the rights to use, copy, modify, merge, publish, distribute, sublicense, +// and/or sell copies of the Software, and to permit persons to whom the +// Software is furnished to do so, subject to the following conditions: +// +// The above copyright notice and this permission notice shall be included in +// all copies or substantial portions of the Software. +// +// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS +// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE +// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER +// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING +// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER +// DEALINGS IN THE SOFTWARE. + +//! TLS configuration based on libp2p TLS specs. +//! +//! See . + +#![cfg_attr(docsrs, feature(doc_cfg, doc_auto_cfg))] + +use crate::{crypto::ed25519::Keypair, PeerId}; + +use std::sync::Arc; + +pub mod certificate; +mod verifier; + +const P2P_ALPN: [u8; 6] = *b"libp2p"; + +/// Create a TLS server configuration for litep2p. +pub fn make_server_config( + keypair: &Keypair, +) -> Result { + let (certificate, private_key) = certificate::generate(keypair)?; + + let mut crypto = rustls::ServerConfig::builder() + .with_cipher_suites(verifier::CIPHERSUITES) + .with_safe_default_kx_groups() + .with_protocol_versions(verifier::PROTOCOL_VERSIONS) + .expect("Cipher suites and kx groups are configured; qed") + .with_client_cert_verifier(Arc::new(verifier::Libp2pCertificateVerifier::new())) + .with_single_cert(vec![certificate], private_key) + .expect("Server cert key DER is valid; qed"); + crypto.alpn_protocols = vec![P2P_ALPN.to_vec()]; + + Ok(crypto) +} + +/// Create a TLS client configuration for libp2p. +pub fn make_client_config( + keypair: &Keypair, + remote_peer_id: Option, +) -> Result { + let (certificate, private_key) = certificate::generate(keypair)?; + + let mut crypto = rustls::ClientConfig::builder() + .with_cipher_suites(verifier::CIPHERSUITES) + .with_safe_default_kx_groups() + .with_protocol_versions(verifier::PROTOCOL_VERSIONS) + .expect("Cipher suites and kx groups are configured; qed") + .with_custom_certificate_verifier(Arc::new( + verifier::Libp2pCertificateVerifier::with_remote_peer_id(remote_peer_id), + )) + .with_single_cert(vec![certificate], private_key) + .expect("Client cert key DER is valid; qed"); + crypto.alpn_protocols = vec![P2P_ALPN.to_vec()]; + + Ok(crypto) +} diff --git a/client/litep2p/src/crypto/tls/test_assets/ed25519.der b/client/litep2p/src/crypto/tls/test_assets/ed25519.der new file mode 100644 index 0000000000000000000000000000000000000000..494a199561a67047c63aa847ebd5a734d664a974 GIT binary patch literal 324 zcmXqLVstQQ{JemfiIIs(gsZ!KuJPrk8h>J!?Gd%_Vy}DSeZYW~jafUjz<|L(PMp`s 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a/client/litep2p/src/crypto/tls/test_assets/gen.sh b/client/litep2p/src/crypto/tls/test_assets/gen.sh new file mode 100644 index 00000000..4b771887 --- /dev/null +++ b/client/litep2p/src/crypto/tls/test_assets/gen.sh @@ -0,0 +1,63 @@ +#ED25519 (works): +openssl genpkey -algorithm ed25519 -out privateKey.key +openssl req -new -subj="/" -key privateKey.key -out req.pem +openssl x509 -req -in req.pem -signkey privateKey.key -out certificate.crt -extensions p2p_ext -extfile ./openssl.cfg +openssl x509 -outform der -in certificate.crt -out ed25519.der + +#ED448 (works): +openssl genpkey -algorithm ed448 -out privateKey.key +openssl req -new -subj="/" -key privateKey.key -out req.pem +openssl x509 -req -in req.pem -signkey privateKey.key -out certificate.crt -extensions p2p_ext -extfile ./openssl.cfg +openssl x509 -outform der -in certificate.crt -out ed448.der + +#RSA_PKCS1_SHA256 (works): +openssl genpkey -algorithm rsa -out privateKey.key +openssl req -new -subj="/" -key privateKey.key -out req.pem +openssl x509 -req -in req.pem -signkey privateKey.key -sha256 -out certificate.crt -extensions p2p_ext -extfile ./openssl.cfg +openssl x509 -outform der -in certificate.crt -out rsa_pkcs1_sha256.der + +#RSA_PKCS1_SHA384 (works): +# reuse privateKey.key and req.pem +openssl x509 -req -in req.pem -signkey privateKey.key -sha384 -out certificate.crt -extensions p2p_ext -extfile ./openssl.cfg +openssl x509 -outform der -in certificate.crt -out rsa_pkcs1_sha384.der + +#RSA_PKCS1_SHA512 (works): +# reuse privateKey.key and req.pem +openssl x509 -req -in req.pem -signkey privateKey.key -sha512 -out certificate.crt -extensions p2p_ext -extfile ./openssl.cfg +openssl x509 -outform der -in certificate.crt -out rsa_pkcs1_sha512.der + +#RSA-PSS TODO +# openssl genpkey -algorithm rsa-pss -pkeyopt rsa_keygen_bits:2048 -pkeyopt rsa_keygen_pubexp:3 -out privateKey.key +# # -sigopt rsa_pss_saltlen:20 +# # -sigopt rsa_padding_mode:pss +# # -sigopt rsa_mgf1_md:sha256 +# openssl req -x509 -nodes -days 365 -subj="/" -key privateKey.key -sha256 -sigopt rsa_pss_saltlen:20 -sigopt rsa_padding_mode:pss -sigopt rsa_mgf1_md:sha256 -out certificate.crt + +#ECDSA_NISTP256_SHA256 (works): +openssl genpkey -algorithm EC -pkeyopt ec_paramgen_curve:P-256 -out privateKey.key +openssl req -new -subj="/" -key privateKey.key -out req.pem +openssl x509 -req -in req.pem -signkey privateKey.key -sha256 -out certificate.crt -extensions p2p_ext -extfile ./openssl.cfg +openssl x509 -outform der -in certificate.crt -out nistp256_sha256.der + +#ECDSA_NISTP384_SHA384 (works): +openssl genpkey -algorithm EC -pkeyopt ec_paramgen_curve:P-384 -out privateKey.key +openssl req -new -subj="/" -key privateKey.key -out req.pem +openssl x509 -req -in req.pem -signkey privateKey.key -sha384 -out certificate.crt -extensions p2p_ext -extfile ./openssl.cfg +openssl x509 -outform der -in certificate.crt -out nistp384_sha384.der + +#ECDSA_NISTP521_SHA512 (works): +openssl genpkey -algorithm EC -pkeyopt ec_paramgen_curve:P-521 -out privateKey.key +openssl req -new -subj="/" -key privateKey.key -out req.pem +openssl x509 -req -in req.pem -signkey privateKey.key -sha512 -out certificate.crt -extensions p2p_ext -extfile ./openssl.cfg +openssl x509 -outform der -in certificate.crt -out nistp521_sha512.der + +#ECDSA_NISTP384_SHA256 (must fail): +openssl genpkey -algorithm EC -pkeyopt ec_paramgen_curve:P-384 -out privateKey.key +openssl req -new -subj="/" -key privateKey.key -out req.pem +openssl x509 -req -in req.pem -signkey privateKey.key -sha256 -out certificate.crt -extensions p2p_ext -extfile ./openssl.cfg +openssl x509 -outform der -in certificate.crt -out nistp384_sha256.der + + +# Remove tmp files + +rm req.pem certificate.crt privateKey.key diff --git a/client/litep2p/src/crypto/tls/test_assets/nistp256_sha256.der b/client/litep2p/src/crypto/tls/test_assets/nistp256_sha256.der new file mode 100644 index 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SwarmEvent::NewListenAddr { + address, + listener_id, + } if listener_id == expected_listener_id => break address, + _ => continue, + }; + } + }; + swarm2.dial(listen_address).unwrap(); + + let await_inbound_connection = async { + loop { + match swarm1.next().await.unwrap() { + SwarmEvent::ConnectionEstablished { peer_id, .. } => break peer_id, + SwarmEvent::IncomingConnectionError { error, .. } => { + panic!("Incoming connection failed: {error}") + } + _ => continue, + }; + } + }; + let await_outbound_connection = async { + loop { + match swarm2.next().await.unwrap() { + SwarmEvent::ConnectionEstablished { peer_id, .. } => break peer_id, + SwarmEvent::OutgoingConnectionError { error, .. } => { + panic!("Failed to dial: {error}") + } + _ => continue, + }; + } + }; + + let (inbound_peer_id, outbound_peer_id) = + future::join(await_inbound_connection, await_outbound_connection).await; + + assert_eq!(&inbound_peer_id, swarm2.local_peer_id()); + assert_eq!(&outbound_peer_id, swarm1.local_peer_id()); +} + +fn make_swarm() -> Swarm { + let identity = libp2p_identity::Keypair::generate_ed25519(); + + let transport = MemoryTransport::default() + .upgrade(Version::V1) + .authenticate(libp2p_tls::Config::new(&identity).unwrap()) + .multiplex(libp2p_yamux::YamuxConfig::default()) + .boxed(); + + SwarmBuilder::without_executor( + transport, + keep_alive::Behaviour, + identity.public().to_peer_id(), + ) + .build() +} diff --git a/client/litep2p/src/crypto/tls/verifier.rs b/client/litep2p/src/crypto/tls/verifier.rs new file mode 100644 index 00000000..470c43c2 --- /dev/null +++ b/client/litep2p/src/crypto/tls/verifier.rs @@ -0,0 +1,256 @@ +// Copyright 2021 Parity Technologies (UK) Ltd. +// +// Permission is hereby granted, free of charge, to any person obtaining a +// copy of this software and associated documentation files (the "Software"), +// to deal in the Software without restriction, including without limitation +// the rights to use, copy, modify, merge, publish, distribute, sublicense, +// and/or sell copies of the Software, and to permit persons to whom the +// Software is furnished to do so, subject to the following conditions: +// +// The above copyright notice and this permission notice shall be included in +// all copies or substantial portions of the Software. +// +// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS +// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE +// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER +// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING +// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER +// DEALINGS IN THE SOFTWARE. + +//! TLS 1.3 certificates and handshakes handling for libp2p +//! +//! This module handles a verification of a client/server certificate chain +//! and signatures allegedly by the given certificates. + +use crate::{crypto::tls::certificate, PeerId}; + +use rustls::{ + cipher_suite::{ + TLS13_AES_128_GCM_SHA256, TLS13_AES_256_GCM_SHA384, TLS13_CHACHA20_POLY1305_SHA256, + }, + client::{HandshakeSignatureValid, ServerCertVerified, ServerCertVerifier}, + internal::msgs::handshake::DigitallySignedStruct, + server::{ClientCertVerified, ClientCertVerifier}, + Certificate, DistinguishedNames, SignatureScheme, SupportedCipherSuite, + SupportedProtocolVersion, +}; + +/// The protocol versions supported by this verifier. +/// +/// The spec says: +/// +/// > The libp2p handshake uses TLS 1.3 (and higher). +/// > Endpoints MUST NOT negotiate lower TLS versions. +pub static PROTOCOL_VERSIONS: &[&SupportedProtocolVersion] = &[&rustls::version::TLS13]; + +/// A list of the TLS 1.3 cipher suites supported by rustls. +// By default rustls creates client/server configs with both +// TLS 1.3 __and__ 1.2 cipher suites. But we don't need 1.2. +pub static CIPHERSUITES: &[SupportedCipherSuite] = &[ + // TLS1.3 suites + TLS13_CHACHA20_POLY1305_SHA256, + TLS13_AES_256_GCM_SHA384, + TLS13_AES_128_GCM_SHA256, +]; + +/// Implementation of the `rustls` certificate verification traits for libp2p. +/// +/// Only TLS 1.3 is supported. TLS 1.2 should be disabled in the configuration of `rustls`. +pub struct Libp2pCertificateVerifier { + /// The peer ID we intend to connect to + remote_peer_id: Option, +} + +/// libp2p requires the following of X.509 server certificate chains: +/// +/// - Exactly one certificate must be presented. +/// - The certificate must be self-signed. +/// - The certificate must have a valid libp2p extension that includes a signature of its public +/// key. +impl Libp2pCertificateVerifier { + pub fn new() -> Self { + Self { + remote_peer_id: None, + } + } + + pub fn with_remote_peer_id(remote_peer_id: Option) -> Self { + Self { remote_peer_id } + } + + /// Return the list of SignatureSchemes that this verifier will handle, + /// in `verify_tls12_signature` and `verify_tls13_signature` calls. + /// + /// This should be in priority order, with the most preferred first. + fn verification_schemes() -> Vec { + vec![ + // TODO SignatureScheme::ECDSA_NISTP521_SHA512 is not supported by `ring` yet + SignatureScheme::ECDSA_NISTP384_SHA384, + SignatureScheme::ECDSA_NISTP256_SHA256, + // TODO SignatureScheme::ED448 is not supported by `ring` yet + SignatureScheme::ED25519, + // In particular, RSA SHOULD NOT be used unless + // no elliptic curve algorithms are supported. + SignatureScheme::RSA_PSS_SHA512, + SignatureScheme::RSA_PSS_SHA384, + SignatureScheme::RSA_PSS_SHA256, + SignatureScheme::RSA_PKCS1_SHA512, + SignatureScheme::RSA_PKCS1_SHA384, + SignatureScheme::RSA_PKCS1_SHA256, + ] + } +} + +impl ServerCertVerifier for Libp2pCertificateVerifier { + fn verify_server_cert( + &self, + end_entity: &Certificate, + intermediates: &[Certificate], + _server_name: &rustls::ServerName, + _scts: &mut dyn Iterator, + _ocsp_response: &[u8], + _now: std::time::SystemTime, + ) -> Result { + let peer_id = verify_presented_certs(end_entity, intermediates)?; + + if let Some(remote_peer_id) = self.remote_peer_id { + // The public host key allows the peer to calculate the peer ID of the peer + // it is connecting to. Clients MUST verify that the peer ID derived from + // the certificate matches the peer ID they intended to connect to, + // and MUST abort the connection if there is a mismatch. + if remote_peer_id != peer_id { + return Err(rustls::Error::PeerMisbehavedError( + "Wrong peer ID in p2p extension".to_string(), + )); + } + } + + Ok(ServerCertVerified::assertion()) + } + + fn verify_tls12_signature( + &self, + _message: &[u8], + _cert: &Certificate, + _dss: &DigitallySignedStruct, + ) -> Result { + unreachable!("`PROTOCOL_VERSIONS` only allows TLS 1.3") + } + + fn verify_tls13_signature( + &self, + message: &[u8], + cert: &Certificate, + dss: &DigitallySignedStruct, + ) -> Result { + verify_tls13_signature(cert, dss.scheme, message, dss.signature()) + } + + fn supported_verify_schemes(&self) -> Vec { + Self::verification_schemes() + } +} + +/// libp2p requires the following of X.509 client certificate chains: +/// +/// - Exactly one certificate must be presented. In particular, client authentication is mandatory +/// in libp2p. +/// - The certificate must be self-signed. +/// - The certificate must have a valid libp2p extension that includes a signature of its public +/// key. +impl ClientCertVerifier for Libp2pCertificateVerifier { + fn offer_client_auth(&self) -> bool { + true + } + + fn client_auth_root_subjects(&self) -> Option { + Some(vec![]) + } + + fn verify_client_cert( + &self, + end_entity: &Certificate, + intermediates: &[Certificate], + _now: std::time::SystemTime, + ) -> Result { + let _: PeerId = verify_presented_certs(end_entity, intermediates)?; + + Ok(ClientCertVerified::assertion()) + } + + fn verify_tls12_signature( + &self, + _message: &[u8], + _cert: &Certificate, + _dss: &DigitallySignedStruct, + ) -> Result { + unreachable!("`PROTOCOL_VERSIONS` only allows TLS 1.3") + } + + fn verify_tls13_signature( + &self, + message: &[u8], + cert: &Certificate, + dss: &DigitallySignedStruct, + ) -> Result { + verify_tls13_signature(cert, dss.scheme, message, dss.signature()) + } + + fn supported_verify_schemes(&self) -> Vec { + Self::verification_schemes() + } +} + +/// When receiving the certificate chain, an endpoint +/// MUST check these conditions and abort the connection attempt if +/// (a) the presented certificate is not yet valid, OR +/// (b) if it is expired. +/// Endpoints MUST abort the connection attempt if more than one certificate is received, +/// or if the certificate’s self-signature is not valid. +fn verify_presented_certs( + end_entity: &Certificate, + intermediates: &[Certificate], +) -> Result { + if !intermediates.is_empty() { + return Err(rustls::Error::General( + "libp2p-tls requires exactly one certificate".into(), + )); + } + + let cert = certificate::parse(end_entity)?; + + Ok(cert.peer_id()) +} + +fn verify_tls13_signature( + cert: &Certificate, + signature_scheme: SignatureScheme, + message: &[u8], + signature: &[u8], +) -> Result { + certificate::parse(cert)?.verify_signature(signature_scheme, message, signature)?; + + Ok(HandshakeSignatureValid::assertion()) +} + +impl From for rustls::Error { + fn from(certificate::ParseError(e): certificate::ParseError) -> Self { + use webpki::Error::*; + match e { + BadDer => rustls::Error::InvalidCertificateEncoding, + e => rustls::Error::InvalidCertificateData(format!("invalid peer certificate: {e}")), + } + } +} +impl From for rustls::Error { + fn from(certificate::VerificationError(e): certificate::VerificationError) -> Self { + use webpki::Error::*; + match e { + InvalidSignatureForPublicKey => rustls::Error::InvalidCertificateSignature, + UnsupportedSignatureAlgorithm | UnsupportedSignatureAlgorithmForPublicKey => + rustls::Error::InvalidCertificateSignatureType, + e => rustls::Error::InvalidCertificateData(format!("invalid peer certificate: {e}")), + } + } +} diff --git a/client/litep2p/src/error.rs b/client/litep2p/src/error.rs new file mode 100644 index 00000000..e78c7b79 --- /dev/null +++ b/client/litep2p/src/error.rs @@ -0,0 +1,559 @@ +// Copyright 2019 Parity Technologies (UK) Ltd. +// Copyright 2023 litep2p developers +// +// Permission is hereby granted, free of charge, to any person obtaining a +// copy of this software and associated documentation files (the "Software"), +// to deal in the Software without restriction, including without limitation +// the rights to use, copy, modify, merge, publish, distribute, sublicense, +// and/or sell copies of the Software, and to permit persons to whom the +// Software is furnished to do so, subject to the following conditions: +// +// The above copyright notice and this permission notice shall be included in +// all copies or substantial portions of the Software. +// +// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS +// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE +// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER +// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING +// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER +// DEALINGS IN THE SOFTWARE. + +#![allow(clippy::enum_variant_names)] + +//! [`Litep2p`](`crate::Litep2p`) error types. + +use crate::{ + protocol::Direction, + transport::manager::limits::ConnectionLimitsError, + types::{protocol::ProtocolName, ConnectionId, SubstreamId}, + PeerId, +}; + +use multiaddr::Multiaddr; +use multihash::{Multihash, MultihashGeneric}; + +use std::io::{self, ErrorKind}; + +// TODO: https://github.com/paritytech/litep2p/issues/204 clean up the overarching error. +// Please note that this error is not propagated directly to the user. +#[allow(clippy::large_enum_variant)] +#[derive(Debug, thiserror::Error)] +pub enum Error { + #[error("Peer `{0}` does not exist")] + PeerDoesntExist(PeerId), + #[error("Peer `{0}` already exists")] + PeerAlreadyExists(PeerId), + #[error("Protocol `{0}` not supported")] + ProtocolNotSupported(String), + #[error("Address error: `{0}`")] + AddressError(#[from] AddressError), + #[error("Parse error: `{0}`")] + ParseError(ParseError), + #[error("I/O error: `{0}`")] + IoError(ErrorKind), + #[error("Negotiation error: `{0}`")] + NegotiationError(#[from] NegotiationError), + #[error("Substream error: `{0}`")] + SubstreamError(#[from] SubstreamError), + #[error("Substream error: `{0}`")] + NotificationError(NotificationError), + #[error("Essential task closed")] + EssentialTaskClosed, + #[error("Unknown error occurred")] + Unknown, + #[error("Cannot dial self: `{0}`")] + CannotDialSelf(Multiaddr), + #[error("Transport not supported")] + TransportNotSupported(Multiaddr), + #[error("Yamux error for substream `{0:?}`: `{1}`")] + YamuxError(Direction, crate::yamux::ConnectionError), + #[error("Operation not supported: `{0}`")] + NotSupported(String), + #[error("Other error occurred: `{0}`")] + Other(String), + #[error("Protocol already exists: `{0:?}`")] + ProtocolAlreadyExists(ProtocolName), + #[error("Operation timed out")] + Timeout, + #[error("Invalid state transition")] + InvalidState, + #[error("DNS address resolution failed")] + DnsAddressResolutionFailed, + #[error("Transport error: `{0}`")] + TransportError(String), + #[cfg(feature = "quic")] + #[error("Failed to generate certificate: `{0}`")] + CertificateGeneration(#[from] crate::crypto::tls::certificate::GenError), + #[error("Invalid data")] + InvalidData, + #[error("Input rejected")] + InputRejected, + #[cfg(feature = "websocket")] + #[error("WebSocket error: `{0}`")] + WebSocket(#[from] tokio_tungstenite::tungstenite::error::Error), + #[error("Insufficient peers")] + InsufficientPeers, + #[error("Substream doens't exist")] + SubstreamDoesntExist, + #[cfg(feature = "webrtc")] + #[error("`str0m` error: `{0}`")] + WebRtc(#[from] str0m::RtcError), + #[error("Remote peer disconnected")] + Disconnected, + #[error("Channel does not exist")] + ChannelDoesntExist, + #[error("Tried to dial self")] + TriedToDialSelf, + #[error("Litep2p is already connected to the peer")] + AlreadyConnected, + #[error("No addres available for `{0}`")] + NoAddressAvailable(PeerId), + #[error("Connection closed")] + ConnectionClosed, + #[cfg(feature = "quic")] + #[error("Quinn error: `{0}`")] + Quinn(quinn::ConnectionError), + #[error("Invalid certificate")] + InvalidCertificate, + #[error("Peer ID mismatch: expected `{0}`, got `{1}`")] + PeerIdMismatch(PeerId, PeerId), + #[error("Channel is clogged")] + ChannelClogged, + #[error("Connection doesn't exist: `{0:?}`")] + ConnectionDoesntExist(ConnectionId), + #[error("Exceeded connection limits `{0:?}`")] + ConnectionLimit(ConnectionLimitsError), + #[error("Failed to dial peer immediately")] + ImmediateDialError(#[from] ImmediateDialError), + #[error("Cannot read system DNS config: `{0}`")] + CannotReadSystemDnsConfig(hickory_resolver::ResolveError), +} + +/// Error type for address parsing. +#[derive(Debug, thiserror::Error)] +pub enum AddressError { + /// The provided address does not correspond to the transport protocol. + /// + /// For example, this can happen when the address used the UDP protocol but + /// the handling transport only allows TCP connections. + #[error("Invalid address for protocol")] + InvalidProtocol, + /// The provided address is not a valid URL. + #[error("Invalid URL")] + InvalidUrl, + /// The provided address does not include a peer ID. + #[error("`PeerId` missing from the address")] + PeerIdMissing, + /// No address is available for the provided peer ID. + #[error("Address not available")] + AddressNotAvailable, + /// The provided address contains an invalid multihash. + #[error("Multihash does not contain a valid peer ID : `{0:?}`")] + InvalidPeerId(Multihash), +} + +#[derive(Debug, thiserror::Error, PartialEq)] +pub enum ParseError { + /// The provided probuf message cannot be decoded. + #[error("Failed to decode protobuf message: `{0:?}`")] + ProstDecodeError(#[from] prost::DecodeError), + /// The provided protobuf message cannot be encoded. + #[error("Failed to encode protobuf message: `{0:?}`")] + ProstEncodeError(#[from] prost::EncodeError), + /// The protobuf message contains an unexpected key type. + /// + /// This error can happen when: + /// - The provided key type is not recognized. + /// - The provided key type is recognized but not supported. + #[error("Unknown key type from protobuf message: `{0}`")] + UnknownKeyType(i32), + /// The public key bytes are invalid and cannot be parsed. + /// + /// This error can happen when: + /// - The received number of bytes is not equal to the expected number of bytes (32 bytes). + /// - The bytes are not a valid Ed25519 public key. + /// - Length of the public key is not represented by 2 bytes (WebRTC specific). + #[error("Invalid public key")] + InvalidPublicKey, + /// The provided date has an invalid format. + /// + /// This error is protocol specific. + #[error("Invalid data")] + InvalidData, + /// The provided reply length is not valid + #[error("Invalid reply length")] + InvalidReplyLength, +} + +#[derive(Debug, thiserror::Error)] +pub enum SubstreamError { + // Note: this can mean as well `SubstreamClosed`. + #[error("Connection closed")] + ConnectionClosed, + #[error("Connection channel clogged")] + ChannelClogged, + #[error("Connection to peer does not exist: `{0}`")] + PeerDoesNotExist(PeerId), + #[error("I/O error: `{0}`")] + IoError(ErrorKind), + #[error("yamux error: `{0}`")] + YamuxError(crate::yamux::ConnectionError, Direction), + #[error("Failed to read from substream, substream id `{0:?}`")] + ReadFailure(Option), + #[error("Failed to write to substream, substream id `{0:?}`")] + WriteFailure(Option), + #[error("Negotiation error: `{0:?}`")] + NegotiationError(#[from] NegotiationError), +} + +// Libp2p yamux does not implement PartialEq for ConnectionError. +impl PartialEq for SubstreamError { + fn eq(&self, other: &Self) -> bool { + match (self, other) { + (Self::ConnectionClosed, Self::ConnectionClosed) => true, + (Self::ChannelClogged, Self::ChannelClogged) => true, + (Self::PeerDoesNotExist(lhs), Self::PeerDoesNotExist(rhs)) => lhs == rhs, + (Self::IoError(lhs), Self::IoError(rhs)) => lhs == rhs, + (Self::YamuxError(lhs, lhs_1), Self::YamuxError(rhs, rhs_1)) => { + if lhs_1 != rhs_1 { + return false; + } + + match (lhs, rhs) { + ( + crate::yamux::ConnectionError::Io(lhs), + crate::yamux::ConnectionError::Io(rhs), + ) => lhs.kind() == rhs.kind(), + ( + crate::yamux::ConnectionError::Decode(lhs), + crate::yamux::ConnectionError::Decode(rhs), + ) => match (lhs, rhs) { + ( + crate::yamux::FrameDecodeError::Io(lhs), + crate::yamux::FrameDecodeError::Io(rhs), + ) => lhs.kind() == rhs.kind(), + ( + crate::yamux::FrameDecodeError::FrameTooLarge(lhs), + crate::yamux::FrameDecodeError::FrameTooLarge(rhs), + ) => lhs == rhs, + ( + crate::yamux::FrameDecodeError::Header(lhs), + crate::yamux::FrameDecodeError::Header(rhs), + ) => match (lhs, rhs) { + ( + crate::yamux::HeaderDecodeError::Version(lhs), + crate::yamux::HeaderDecodeError::Version(rhs), + ) => lhs == rhs, + ( + crate::yamux::HeaderDecodeError::Type(lhs), + crate::yamux::HeaderDecodeError::Type(rhs), + ) => lhs == rhs, + _ => false, + }, + _ => false, + }, + ( + crate::yamux::ConnectionError::NoMoreStreamIds, + crate::yamux::ConnectionError::NoMoreStreamIds, + ) => true, + ( + crate::yamux::ConnectionError::Closed, + crate::yamux::ConnectionError::Closed, + ) => true, + ( + crate::yamux::ConnectionError::TooManyStreams, + crate::yamux::ConnectionError::TooManyStreams, + ) => true, + _ => false, + } + } + + (Self::ReadFailure(lhs), Self::ReadFailure(rhs)) => lhs == rhs, + (Self::WriteFailure(lhs), Self::WriteFailure(rhs)) => lhs == rhs, + (Self::NegotiationError(lhs), Self::NegotiationError(rhs)) => lhs == rhs, + _ => false, + } + } +} + +/// Error during the negotiation phase. +#[derive(Debug, thiserror::Error)] +pub enum NegotiationError { + /// Error occurred during the multistream-select phase of the negotiation. + #[error("multistream-select error: `{0:?}`")] + MultistreamSelectError(#[from] crate::multistream_select::NegotiationError), + /// Error occurred during the Noise handshake negotiation. + #[error("multistream-select error: `{0:?}`")] + SnowError(#[from] snow::Error), + /// The peer ID was not provided by the noise handshake. + #[error("`PeerId` missing from Noise handshake")] + PeerIdMissing, + /// The remote peer ID is not the same as the one expected. + #[error("The signature of the remote identity's public key does not verify")] + BadSignature, + /// The negotiation operation timed out. + #[error("Operation timed out")] + Timeout, + /// The message provided over the wire has an invalid format or is unsupported. + #[error("Parse error: `{0}`")] + ParseError(#[from] ParseError), + /// An I/O error occurred during the negotiation process. + #[error("I/O error: `{0}`")] + IoError(ErrorKind), + /// Expected a different state during the negotiation process. + #[error("Expected a different state")] + StateMismatch, + /// The noise handshake provided a different peer ID than the one expected in the dialing + /// address. + #[error("Peer ID mismatch: expected `{0}`, got `{1}`")] + PeerIdMismatch(PeerId, PeerId), + /// Error specific to the QUIC transport. + #[cfg(feature = "quic")] + #[error("QUIC error: `{0}`")] + Quic(#[from] QuicError), + /// Error specific to the WebSocket transport. + #[cfg(feature = "websocket")] + #[error("WebSocket error: `{0}`")] + WebSocket(#[from] tokio_tungstenite::tungstenite::error::Error), +} + +impl PartialEq for NegotiationError { + fn eq(&self, other: &Self) -> bool { + match (self, other) { + (Self::MultistreamSelectError(lhs), Self::MultistreamSelectError(rhs)) => lhs == rhs, + (Self::SnowError(lhs), Self::SnowError(rhs)) => lhs == rhs, + (Self::ParseError(lhs), Self::ParseError(rhs)) => lhs == rhs, + (Self::IoError(lhs), Self::IoError(rhs)) => lhs == rhs, + (Self::PeerIdMismatch(lhs, lhs_1), Self::PeerIdMismatch(rhs, rhs_1)) => + lhs == rhs && lhs_1 == rhs_1, + #[cfg(feature = "quic")] + (Self::Quic(lhs), Self::Quic(rhs)) => lhs == rhs, + #[cfg(feature = "websocket")] + (Self::WebSocket(lhs), Self::WebSocket(rhs)) => + core::mem::discriminant(lhs) == core::mem::discriminant(rhs), + _ => core::mem::discriminant(self) == core::mem::discriminant(other), + } + } +} + +#[derive(Debug, thiserror::Error)] +pub enum NotificationError { + #[error("Peer already exists")] + PeerAlreadyExists, + #[error("Peer is in invalid state")] + InvalidState, + #[error("Notifications clogged")] + NotificationsClogged, + #[error("Notification stream closed")] + NotificationStreamClosed(PeerId), +} + +/// The error type for dialing a peer. +/// +/// This error is reported via the litep2p events after performing +/// a network dialing operation. +#[derive(Debug, thiserror::Error)] +pub enum DialError { + /// The dialing operation timed out. + /// + /// This error indicates that the `connection_open_timeout` from the protocol configuration + /// was exceeded. + #[error("Dial timed out")] + Timeout, + /// The provided address for dialing is invalid. + #[error("Address error: `{0}`")] + AddressError(#[from] AddressError), + /// An error occurred during DNS lookup operation. + /// + /// The address provided may be valid, however it failed to resolve to a concrete IP address. + /// This error may be recoverable. + #[error("DNS lookup error for `{0}`")] + DnsError(#[from] DnsError), + /// An error occurred during the negotiation process. + #[error("Negotiation error: `{0}`")] + NegotiationError(#[from] NegotiationError), +} + +/// Dialing resulted in an immediate error before performing any network operations. +#[derive(Debug, thiserror::Error, Copy, Clone, Eq, PartialEq)] +pub enum ImmediateDialError { + /// The provided address does not include a peer ID. + #[error("`PeerId` missing from the address")] + PeerIdMissing, + /// The peer ID provided in the address is the same as the local peer ID. + #[error("Tried to dial self")] + TriedToDialSelf, + /// Cannot dial an already connected peer. + #[error("Already connected to peer")] + AlreadyConnected, + /// Cannot dial a peer that does not have any address available. + #[error("No address available for peer")] + NoAddressAvailable, + /// The essential task was closed. + #[error("TaskClosed")] + TaskClosed, + /// The channel is clogged. + #[error("Connection channel clogged")] + ChannelClogged, +} + +/// Error during the QUIC transport negotiation. +#[cfg(feature = "quic")] +#[derive(Debug, thiserror::Error, PartialEq)] +pub enum QuicError { + /// The provided certificate is invalid. + #[error("Invalid certificate")] + InvalidCertificate, + /// The connection was lost. + #[error("Failed to negotiate QUIC: `{0}`")] + ConnectionError(#[from] quinn::ConnectionError), + /// The connection could not be established. + #[error("Failed to connect to peer: `{0}`")] + ConnectError(#[from] quinn::ConnectError), +} + +/// Error during DNS resolution. +#[derive(Debug, thiserror::Error, PartialEq)] +pub enum DnsError { + /// The DNS resolution failed to resolve the provided URL. + #[error("DNS failed to resolve url `{0}`")] + ResolveError(String), + /// The DNS expected a different IP address version. + /// + /// For example, DNSv4 was expected but DNSv6 was provided. + #[error("DNS type is different from the provided IP address")] + IpVersionMismatch, +} + +impl From> for Error { + fn from(hash: MultihashGeneric<64>) -> Self { + Error::AddressError(AddressError::InvalidPeerId(hash)) + } +} + +impl From for Error { + fn from(error: io::Error) -> Error { + Error::IoError(error.kind()) + } +} + +impl From for SubstreamError { + fn from(error: io::Error) -> SubstreamError { + SubstreamError::IoError(error.kind()) + } +} + +impl From for DialError { + fn from(error: io::Error) -> Self { + DialError::NegotiationError(NegotiationError::IoError(error.kind())) + } +} + +impl From for Error { + fn from(error: crate::multistream_select::NegotiationError) -> Error { + Error::NegotiationError(NegotiationError::MultistreamSelectError(error)) + } +} + +impl From for Error { + fn from(error: snow::Error) -> Self { + Error::NegotiationError(NegotiationError::SnowError(error)) + } +} + +impl From> for Error { + fn from(_: tokio::sync::mpsc::error::SendError) -> Self { + Error::EssentialTaskClosed + } +} + +impl From for Error { + fn from(_: tokio::sync::oneshot::error::RecvError) -> Self { + Error::EssentialTaskClosed + } +} + +impl From for Error { + fn from(error: prost::DecodeError) -> Self { + Error::ParseError(ParseError::ProstDecodeError(error)) + } +} + +impl From for Error { + fn from(error: prost::EncodeError) -> Self { + Error::ParseError(ParseError::ProstEncodeError(error)) + } +} + +impl From for NegotiationError { + fn from(error: io::Error) -> Self { + NegotiationError::IoError(error.kind()) + } +} + +impl From for Error { + fn from(error: ParseError) -> Self { + Error::ParseError(error) + } +} + +impl From> for AddressError { + fn from(hash: MultihashGeneric<64>) -> Self { + AddressError::InvalidPeerId(hash) + } +} + +#[cfg(feature = "quic")] +impl From for Error { + fn from(error: quinn::ConnectionError) -> Self { + match error { + quinn::ConnectionError::TimedOut => Error::Timeout, + error => Error::Quinn(error), + } + } +} + +#[cfg(feature = "quic")] +impl From for DialError { + fn from(error: quinn::ConnectionError) -> Self { + match error { + quinn::ConnectionError::TimedOut => DialError::Timeout, + error => DialError::NegotiationError(NegotiationError::Quic(error.into())), + } + } +} + +#[cfg(feature = "quic")] +impl From for DialError { + fn from(error: quinn::ConnectError) -> Self { + DialError::NegotiationError(NegotiationError::Quic(error.into())) + } +} + +impl From for Error { + fn from(error: ConnectionLimitsError) -> Self { + Error::ConnectionLimit(error) + } +} + +#[cfg(test)] +mod tests { + use super::*; + use tokio::sync::mpsc::{channel, Sender}; + + #[tokio::test] + async fn try_from_errors() { + let (tx, rx) = channel(1); + drop(rx); + + async fn test(tx: Sender<()>) -> crate::Result<()> { + tx.send(()).await.map_err(From::from) + } + + match test(tx).await.unwrap_err() { + Error::EssentialTaskClosed => {} + _ => panic!("invalid error"), + } + } +} diff --git a/client/litep2p/src/executor.rs b/client/litep2p/src/executor.rs new file mode 100644 index 00000000..fe8d06ea --- /dev/null +++ b/client/litep2p/src/executor.rs @@ -0,0 +1,72 @@ +// Copyright 2023 litep2p developers +// +// Permission is hereby granted, free of charge, to any person obtaining a +// copy of this software and associated documentation files (the "Software"), +// to deal in the Software without restriction, including without limitation +// the rights to use, copy, modify, merge, publish, distribute, sublicense, +// and/or sell copies of the Software, and to permit persons to whom the +// Software is furnished to do so, subject to the following conditions: +// +// The above copyright notice and this permission notice shall be included in +// all copies or substantial portions of the Software. +// +// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS +// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE +// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER +// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING +// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER +// DEALINGS IN THE SOFTWARE. + +//! Behavior defining how futures running in the background should be executed. + +use std::{future::Future, pin::Pin}; + +/// Trait which defines the interface the executor must implement. +pub trait Executor: Send + Sync { + /// Start executing a future in the background. + fn run(&self, future: Pin + Send>>); + + /// Start executing a future in the background and give the future a name; + fn run_with_name(&self, name: &'static str, future: Pin + Send>>); +} + +/// Default executor, defaults to calling `tokio::spawn()`. +pub(crate) struct DefaultExecutor; + +impl Executor for DefaultExecutor { + fn run(&self, future: Pin + Send>>) { + tokio::spawn(future); + } + + fn run_with_name(&self, _: &'static str, future: Pin + Send>>) { + tokio::spawn(future); + } +} + +#[cfg(test)] +mod tests { + use super::*; + use tokio::sync::mpsc::channel; + + #[tokio::test] + async fn run_with_name() { + let executor = DefaultExecutor; + let (tx, mut rx) = channel(1); + + let sender = tx.clone(); + executor.run(Box::pin(async move { + sender.send(1337usize).await.unwrap(); + })); + + executor.run_with_name( + "test", + Box::pin(async move { + tx.send(1337usize).await.unwrap(); + }), + ); + + assert_eq!(rx.recv().await.unwrap(), 1337usize); + assert_eq!(rx.recv().await.unwrap(), 1337usize); + } +} diff --git a/client/litep2p/src/lib.rs b/client/litep2p/src/lib.rs new file mode 100644 index 00000000..0d09cdcb --- /dev/null +++ b/client/litep2p/src/lib.rs @@ -0,0 +1,681 @@ +// Copyright 2023 litep2p developers +// +// Permission is hereby granted, free of charge, to any person obtaining a +// copy of this software and associated documentation files (the "Software"), +// to deal in the Software without restriction, including without limitation +// the rights to use, copy, modify, merge, publish, distribute, sublicense, +// and/or sell copies of the Software, and to permit persons to whom the +// Software is furnished to do so, subject to the following conditions: +// +// The above copyright notice and this permission notice shall be included in +// all copies or substantial portions of the Software. +// +// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS +// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE +// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER +// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING +// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER +// DEALINGS IN THE SOFTWARE. + +#![allow(clippy::single_match)] +#![allow(clippy::result_large_err)] +#![allow(clippy::large_enum_variant)] +#![allow(clippy::redundant_pattern_matching)] +#![allow(clippy::type_complexity)] +#![allow(clippy::result_unit_err)] +#![allow(clippy::should_implement_trait)] +#![allow(clippy::too_many_arguments)] +#![allow(clippy::assign_op_pattern)] +#![allow(clippy::match_like_matches_macro)] + +use crate::{ + addresses::PublicAddresses, + config::Litep2pConfig, + error::DialError, + protocol::{ + libp2p::{bitswap::Bitswap, identify::Identify, kademlia::Kademlia, ping::Ping}, + mdns::Mdns, + notification::NotificationProtocol, + request_response::RequestResponseProtocol, + SubstreamKeepAlive, + }, + transport::{ + manager::{SupportedTransport, TransportManager, TransportManagerBuilder}, + tcp::TcpTransport, + TransportBuilder, TransportEvent, + }, +}; + +#[cfg(feature = "quic")] +use crate::transport::quic::QuicTransport; +#[cfg(feature = "webrtc")] +use crate::transport::webrtc::WebRtcTransport; +#[cfg(feature = "websocket")] +use crate::transport::websocket::WebSocketTransport; + +use hickory_resolver::{name_server::TokioConnectionProvider, TokioResolver}; +use multiaddr::{Multiaddr, Protocol}; +use transport::Endpoint; +use types::ConnectionId; + +pub use bandwidth::BandwidthSink; +pub use error::Error; +pub use peer_id::PeerId; +use std::{collections::HashSet, sync::Arc}; +pub use types::protocol::ProtocolName; + +pub(crate) mod peer_id; + +pub mod addresses; +pub mod codec; +pub mod config; +pub mod crypto; +pub mod error; +pub mod executor; +pub mod protocol; +pub mod substream; +pub mod transport; +pub mod types; +pub mod yamux; + +mod bandwidth; +mod multistream_select; +pub mod utils; + +#[cfg(test)] +mod mock; + +/// Public result type used by the crate. +pub type Result = std::result::Result; + +/// Logging target for the file. +const LOG_TARGET: &str = "litep2p"; + +/// Default channel size. +const DEFAULT_CHANNEL_SIZE: usize = 4096usize; + +/// Litep2p events. +#[derive(Debug)] +pub enum Litep2pEvent { + /// Connection established to peer. + ConnectionEstablished { + /// Remote peer ID. + peer: PeerId, + + /// Endpoint. + endpoint: Endpoint, + }, + + /// Connection closed to remote peer. + ConnectionClosed { + /// Peer ID. + peer: PeerId, + + /// Connection ID. + connection_id: ConnectionId, + }, + + /// Failed to dial peer. + /// + /// This error can originate from dialing a single peer address. + DialFailure { + /// Address of the peer. + address: Multiaddr, + + /// Dial error. + error: DialError, + }, + + /// A list of multiple dial failures. + ListDialFailures { + /// List of errors. + /// + /// Depending on the transport, the address might be different for each error. + errors: Vec<(Multiaddr, DialError)>, + }, +} + +/// [`Litep2p`] object. +pub struct Litep2p { + /// Local peer ID. + local_peer_id: PeerId, + + /// Listen addresses. + listen_addresses: Vec, + + /// Transport manager. + transport_manager: TransportManager, + + /// Bandwidth sink. + bandwidth_sink: BandwidthSink, +} + +impl Litep2p { + /// Create new [`Litep2p`]. + pub fn new(mut litep2p_config: Litep2pConfig) -> crate::Result { + let local_peer_id = PeerId::from_public_key(&litep2p_config.keypair.public().into()); + let bandwidth_sink = BandwidthSink::new(); + let mut listen_addresses = vec![]; + + let (resolver_config, resolver_opts) = if litep2p_config.use_system_dns_config { + hickory_resolver::system_conf::read_system_conf() + .map_err(Error::CannotReadSystemDnsConfig)? + } else { + (Default::default(), Default::default()) + }; + let resolver = Arc::new( + TokioResolver::builder_with_config(resolver_config, TokioConnectionProvider::default()) + .with_options(resolver_opts) + .build(), + ); + + let supported_transports = Self::supported_transports(&litep2p_config); + let mut transport_manager = TransportManagerBuilder::new() + .with_keypair(litep2p_config.keypair.clone()) + .with_supported_transports(supported_transports) + .with_bandwidth_sink(bandwidth_sink.clone()) + .with_connection_limits_config(litep2p_config.connection_limits) + .build(); + + let transport_handle = transport_manager.transport_manager_handle(); + // add known addresses to `TransportManager`, if any exist + if !litep2p_config.known_addresses.is_empty() { + for (peer, addresses) in litep2p_config.known_addresses { + transport_manager.add_known_address(peer, addresses.iter().cloned()); + } + } + + // start notification protocol event loops + for (protocol, config) in litep2p_config.notification_protocols.into_iter() { + tracing::debug!( + target: LOG_TARGET, + ?protocol, + "enable notification protocol", + ); + + let service = transport_manager.register_protocol( + protocol, + config.fallback_names.clone(), + config.codec, + litep2p_config.keep_alive_timeout, + SubstreamKeepAlive::Yes, + ); + let executor = Arc::clone(&litep2p_config.executor); + litep2p_config.executor.run(Box::pin(async move { + NotificationProtocol::new(service, config, executor).run().await + })); + } + + // start request-response protocol event loops + for (protocol, config) in litep2p_config.request_response_protocols.into_iter() { + tracing::debug!( + target: LOG_TARGET, + ?protocol, + "enable request-response protocol", + ); + + let service = transport_manager.register_protocol( + protocol, + config.fallback_names.clone(), + config.codec, + litep2p_config.keep_alive_timeout, + SubstreamKeepAlive::Yes, + ); + litep2p_config.executor.run(Box::pin(async move { + RequestResponseProtocol::new(service, config).run().await + })); + } + + // start user protocol event loops + for (protocol_name, protocol) in litep2p_config.user_protocols.into_iter() { + tracing::debug!(target: LOG_TARGET, protocol = ?protocol_name, "enable user protocol"); + + let service = transport_manager.register_protocol( + protocol_name, + Vec::new(), + protocol.codec(), + litep2p_config.keep_alive_timeout, + // TODO: make configurable by user. + SubstreamKeepAlive::Yes, + ); + litep2p_config.executor.run(Box::pin(async move { + let _ = protocol.run(service).await; + })); + } + + // start ping protocol event loop if enabled + if let Some(ping_config) = litep2p_config.ping.take() { + tracing::debug!( + target: LOG_TARGET, + protocol = ?ping_config.protocol, + "enable ipfs ping protocol", + ); + + let service = transport_manager.register_protocol( + ping_config.protocol.clone(), + Vec::new(), + ping_config.codec, + litep2p_config.keep_alive_timeout, + SubstreamKeepAlive::No, + ); + litep2p_config.executor.run(Box::pin(async move { + Ping::new(service, ping_config).run().await + })); + } + + // start kademlia protocol event loops + for kademlia_config in litep2p_config.kademlia.into_iter() { + tracing::debug!( + target: LOG_TARGET, + protocol_names = ?kademlia_config.protocol_names, + "enable ipfs kademlia protocol", + ); + + let main_protocol = + kademlia_config.protocol_names.first().expect("protocol name to exist"); + let fallback_names = kademlia_config.protocol_names.iter().skip(1).cloned().collect(); + + let service = transport_manager.register_protocol( + main_protocol.clone(), + fallback_names, + kademlia_config.codec, + litep2p_config.keep_alive_timeout, + SubstreamKeepAlive::Yes, + ); + litep2p_config.executor.run(Box::pin(async move { + let _ = Kademlia::new(service, kademlia_config).run().await; + })); + } + + // start identify protocol event loop if enabled + let mut identify_info = match litep2p_config.identify.take() { + None => None, + Some(mut identify_config) => { + tracing::debug!( + target: LOG_TARGET, + protocol = ?identify_config.protocol, + "enable ipfs identify protocol", + ); + + let service = transport_manager.register_protocol( + identify_config.protocol.clone(), + Vec::new(), + identify_config.codec, + litep2p_config.keep_alive_timeout, + SubstreamKeepAlive::No, + ); + identify_config.public = Some(litep2p_config.keypair.public().into()); + + Some((service, identify_config)) + } + }; + + // start bitswap protocol event loop if enabled + if let Some(bitswap_config) = litep2p_config.bitswap.take() { + tracing::debug!( + target: LOG_TARGET, + protocol = ?bitswap_config.protocol, + "enable ipfs bitswap protocol", + ); + + let service = transport_manager.register_protocol( + bitswap_config.protocol.clone(), + Vec::new(), + bitswap_config.codec, + litep2p_config.keep_alive_timeout, + SubstreamKeepAlive::Yes, + ); + litep2p_config.executor.run(Box::pin(async move { + Bitswap::new(service, bitswap_config).run().await + })); + } + + // enable tcp transport if the config exists + if let Some(mut config) = litep2p_config.tcp.take() { + config.max_parallel_dials = litep2p_config.max_parallel_dials; + let handle = transport_manager.transport_handle(Arc::clone(&litep2p_config.executor)); + let (transport, transport_listen_addresses) = + ::new(handle, config, resolver.clone())?; + + for address in transport_listen_addresses { + transport_manager.register_listen_address(address.clone()); + listen_addresses.push(address.with(Protocol::P2p(*local_peer_id.as_ref()))); + } + + transport_manager.register_transport(SupportedTransport::Tcp, Box::new(transport)); + } + + // enable quic transport if the config exists + #[cfg(feature = "quic")] + if let Some(config) = litep2p_config.quic.take() { + let handle = transport_manager.transport_handle(Arc::clone(&litep2p_config.executor)); + let (transport, transport_listen_addresses) = + ::new(handle, config, resolver.clone())?; + + for address in transport_listen_addresses { + transport_manager.register_listen_address(address.clone()); + listen_addresses.push(address.with(Protocol::P2p(*local_peer_id.as_ref()))); + } + + transport_manager.register_transport(SupportedTransport::Quic, Box::new(transport)); + } + + // enable webrtc transport if the config exists + #[cfg(feature = "webrtc")] + if let Some(config) = litep2p_config.webrtc.take() { + let handle = transport_manager.transport_handle(Arc::clone(&litep2p_config.executor)); + let (transport, transport_listen_addresses) = + ::new(handle, config, resolver.clone())?; + + for address in transport_listen_addresses { + transport_manager.register_listen_address(address.clone()); + listen_addresses.push(address.with(Protocol::P2p(*local_peer_id.as_ref()))); + } + + transport_manager.register_transport(SupportedTransport::WebRtc, Box::new(transport)); + } + + // enable websocket transport if the config exists + #[cfg(feature = "websocket")] + if let Some(mut config) = litep2p_config.websocket.take() { + config.max_parallel_dials = litep2p_config.max_parallel_dials; + let handle = transport_manager.transport_handle(Arc::clone(&litep2p_config.executor)); + let (transport, transport_listen_addresses) = + ::new(handle, config, resolver)?; + + for address in transport_listen_addresses { + transport_manager.register_listen_address(address.clone()); + listen_addresses.push(address.with(Protocol::P2p(*local_peer_id.as_ref()))); + } + + transport_manager + .register_transport(SupportedTransport::WebSocket, Box::new(transport)); + } + + // enable mdns if the config exists + if let Some(config) = litep2p_config.mdns.take() { + let mdns = Mdns::new(transport_handle, config, listen_addresses.clone()); + + litep2p_config.executor.run(Box::pin(async move { + let _ = mdns.start().await; + })); + } + + // if identify was enabled, give it the enabled protocols and listen addresses and start it + if let Some((service, mut identify_config)) = identify_info.take() { + identify_config.protocols = transport_manager.protocols().cloned().collect(); + let identify = Identify::new(service, identify_config); + + litep2p_config.executor.run(Box::pin(async move { + let _ = identify.run().await; + })); + } + + if transport_manager.installed_transports().count() == 0 { + return Err(Error::Other("No transport specified".to_string())); + } + + // verify that at least one transport is specified + if listen_addresses.is_empty() { + tracing::warn!( + target: LOG_TARGET, + "litep2p started with no listen addresses, cannot accept inbound connections", + ); + } + + Ok(Self { + local_peer_id, + bandwidth_sink, + listen_addresses, + transport_manager, + }) + } + + /// Collect supported transports before initializing the transports themselves. + /// + /// Information of the supported transports is needed to initialize protocols but + /// information about protocols must be known to initialize transports so the initialization + /// has to be split. + fn supported_transports(config: &Litep2pConfig) -> HashSet { + let mut supported_transports = HashSet::new(); + + config + .tcp + .is_some() + .then(|| supported_transports.insert(SupportedTransport::Tcp)); + #[cfg(feature = "quic")] + config + .quic + .is_some() + .then(|| supported_transports.insert(SupportedTransport::Quic)); + #[cfg(feature = "websocket")] + config + .websocket + .is_some() + .then(|| supported_transports.insert(SupportedTransport::WebSocket)); + #[cfg(feature = "webrtc")] + config + .webrtc + .is_some() + .then(|| supported_transports.insert(SupportedTransport::WebRtc)); + + supported_transports + } + + /// Get local peer ID. + pub fn local_peer_id(&self) -> &PeerId { + &self.local_peer_id + } + + /// Get the list of public addresses of the node. + pub fn public_addresses(&self) -> PublicAddresses { + self.transport_manager.public_addresses() + } + + /// Get the list of listen addresses of the node. + pub fn listen_addresses(&self) -> impl Iterator { + self.listen_addresses.iter() + } + + /// Get handle to bandwidth sink. + pub fn bandwidth_sink(&self) -> BandwidthSink { + self.bandwidth_sink.clone() + } + + /// Dial peer. + pub async fn dial(&mut self, peer: &PeerId) -> crate::Result<()> { + self.transport_manager.dial(*peer).await + } + + /// Dial address. + pub async fn dial_address(&mut self, address: Multiaddr) -> crate::Result<()> { + self.transport_manager.dial_address(address).await + } + + /// Add one ore more known addresses for peer. + /// + /// Return value denotes how many addresses were added for the peer. + /// Addresses belonging to disabled/unsupported transports will be ignored. + pub fn add_known_address( + &mut self, + peer: PeerId, + address: impl Iterator, + ) -> usize { + self.transport_manager.add_known_address(peer, address) + } + + /// Poll next event. + /// + /// This function must be called in order for litep2p to make progress. + pub async fn next_event(&mut self) -> Option { + loop { + match self.transport_manager.next().await? { + TransportEvent::ConnectionEstablished { peer, endpoint, .. } => + return Some(Litep2pEvent::ConnectionEstablished { peer, endpoint }), + TransportEvent::ConnectionClosed { + peer, + connection_id, + } => + return Some(Litep2pEvent::ConnectionClosed { + peer, + connection_id, + }), + TransportEvent::DialFailure { address, error, .. } => + return Some(Litep2pEvent::DialFailure { address, error }), + + TransportEvent::OpenFailure { errors, .. } => { + return Some(Litep2pEvent::ListDialFailures { errors }); + } + _ => {} + } + } + } +} + +#[cfg(test)] +mod tests { + use crate::{ + config::ConfigBuilder, + protocol::{libp2p::ping, notification::Config as NotificationConfig}, + types::protocol::ProtocolName, + Litep2p, Litep2pEvent, PeerId, + }; + use multiaddr::{Multiaddr, Protocol}; + use multihash::Multihash; + use std::net::Ipv4Addr; + + #[tokio::test] + async fn initialize_litep2p() { + let _ = tracing_subscriber::fmt() + .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) + .try_init(); + + let (config1, _service1) = NotificationConfig::new( + ProtocolName::from("/notificaton/1"), + 1337usize, + vec![1, 2, 3, 4], + Vec::new(), + false, + 64, + 64, + true, + ); + let (config2, _service2) = NotificationConfig::new( + ProtocolName::from("/notificaton/2"), + 1337usize, + vec![1, 2, 3, 4], + Vec::new(), + false, + 64, + 64, + true, + ); + let (ping_config, _ping_event_stream) = ping::Config::default(); + + let config = ConfigBuilder::new() + .with_tcp(Default::default()) + .with_notification_protocol(config1) + .with_notification_protocol(config2) + .with_libp2p_ping(ping_config) + .build(); + + let _litep2p = Litep2p::new(config).unwrap(); + } + + #[tokio::test] + async fn no_transport_given() { + let _ = tracing_subscriber::fmt() + .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) + .try_init(); + + let (config1, _service1) = NotificationConfig::new( + ProtocolName::from("/notificaton/1"), + 1337usize, + vec![1, 2, 3, 4], + Vec::new(), + false, + 64, + 64, + true, + ); + let (config2, _service2) = NotificationConfig::new( + ProtocolName::from("/notificaton/2"), + 1337usize, + vec![1, 2, 3, 4], + Vec::new(), + false, + 64, + 64, + true, + ); + let (ping_config, _ping_event_stream) = ping::Config::default(); + + let config = ConfigBuilder::new() + .with_notification_protocol(config1) + .with_notification_protocol(config2) + .with_libp2p_ping(ping_config) + .build(); + + assert!(Litep2p::new(config).is_err()); + } + + #[tokio::test] + async fn dial_same_address_twice() { + let _ = tracing_subscriber::fmt() + .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) + .try_init(); + + let (config1, _service1) = NotificationConfig::new( + ProtocolName::from("/notificaton/1"), + 1337usize, + vec![1, 2, 3, 4], + Vec::new(), + false, + 64, + 64, + true, + ); + let (config2, _service2) = NotificationConfig::new( + ProtocolName::from("/notificaton/2"), + 1337usize, + vec![1, 2, 3, 4], + Vec::new(), + false, + 64, + 64, + true, + ); + let (ping_config, _ping_event_stream) = ping::Config::default(); + + let config = ConfigBuilder::new() + .with_tcp(Default::default()) + .with_notification_protocol(config1) + .with_notification_protocol(config2) + .with_libp2p_ping(ping_config) + .build(); + + let peer = PeerId::random(); + let address = Multiaddr::empty() + .with(Protocol::Ip4(Ipv4Addr::new(255, 254, 253, 252))) + .with(Protocol::Tcp(8888)) + .with(Protocol::P2p( + Multihash::from_bytes(&peer.to_bytes()).unwrap(), + )); + + let mut litep2p = Litep2p::new(config).unwrap(); + litep2p.dial_address(address.clone()).await.unwrap(); + litep2p.dial_address(address.clone()).await.unwrap(); + + match litep2p.next_event().await { + Some(Litep2pEvent::DialFailure { .. }) => {} + _ => panic!("invalid event received"), + } + + // verify that the second same dial was ignored and the dial failure is reported only once + match tokio::time::timeout(std::time::Duration::from_secs(20), litep2p.next_event()).await { + Err(_) => {} + _ => panic!("invalid event received"), + } + } +} diff --git a/client/litep2p/src/mock/mod.rs b/client/litep2p/src/mock/mod.rs new file mode 100644 index 00000000..e9db4b6b --- /dev/null +++ b/client/litep2p/src/mock/mod.rs @@ -0,0 +1,21 @@ +// Copyright 2023 litep2p developers +// +// Permission is hereby granted, free of charge, to any person obtaining a +// copy of this software and associated documentation files (the "Software"), +// to deal in the Software without restriction, including without limitation +// the rights to use, copy, modify, merge, publish, distribute, sublicense, +// and/or sell copies of the Software, and to permit persons to whom the +// Software is furnished to do so, subject to the following conditions: +// +// The above copyright notice and this permission notice shall be included in +// all copies or substantial portions of the Software. +// +// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS +// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE +// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER +// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING +// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER +// DEALINGS IN THE SOFTWARE. + +pub mod substream; diff --git a/client/litep2p/src/mock/substream.rs b/client/litep2p/src/mock/substream.rs new file mode 100644 index 00000000..235548d3 --- /dev/null +++ b/client/litep2p/src/mock/substream.rs @@ -0,0 +1,162 @@ +// Copyright 2023 litep2p developers +// +// Permission is hereby granted, free of charge, to any person obtaining a +// copy of this software and associated documentation files (the "Software"), +// to deal in the Software without restriction, including without limitation +// the rights to use, copy, modify, merge, publish, distribute, sublicense, +// and/or sell copies of the Software, and to permit persons to whom the +// Software is furnished to do so, subject to the following conditions: +// +// The above copyright notice and this permission notice shall be included in +// all copies or substantial portions of the Software. +// +// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS +// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE +// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER +// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING +// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER +// DEALINGS IN THE SOFTWARE. + +use crate::error::SubstreamError; + +use bytes::{Bytes, BytesMut}; +use futures::{Sink, Stream}; + +use std::{ + fmt::Debug, + pin::Pin, + task::{Context, Poll}, +}; + +/// Trait which describes the behavior of a mock substream. +pub trait Substream: + Debug + + Stream> + + Sink + + Send + + Unpin + + 'static +{ +} + +/// Blanket implementation for [`Substream`]. +impl< + T: Debug + + Stream> + + Sink + + Send + + Unpin + + 'static, + > Substream for T +{ +} + +mockall::mock! { + #[derive(Debug)] + pub Substream {} + + impl Sink for Substream { + type Error = SubstreamError; + + fn poll_ready<'a>( + self: Pin<&mut Self>, + cx: &mut Context<'a> + ) -> Poll>; + + fn start_send(self: Pin<&mut Self>, item: bytes::Bytes) -> Result<(), SubstreamError>; + + fn poll_flush<'a>( + self: Pin<&mut Self>, + cx: &mut Context<'a> + ) -> Poll>; + + fn poll_close<'a>( + self: Pin<&mut Self>, + cx: &mut Context<'a> + ) -> Poll>; + } + + impl Stream for Substream { + type Item = Result; + + fn poll_next<'a>( + self: Pin<&mut Self>, + cx: &mut Context<'a> + ) -> Poll>>; + } +} + +/// Dummy substream which just implements `Stream + Sink` and returns `Poll::Pending`/`Ok(())` +#[derive(Debug)] +pub struct DummySubstream {} + +impl DummySubstream { + /// Create new [`DummySubstream`]. + #[cfg(test)] + pub fn new() -> Self { + Self {} + } +} + +impl Sink for DummySubstream { + type Error = SubstreamError; + + fn poll_ready(self: Pin<&mut Self>, _cx: &mut Context<'_>) -> Poll> { + Poll::Pending + } + + fn start_send(self: Pin<&mut Self>, _item: bytes::Bytes) -> Result<(), SubstreamError> { + Ok(()) + } + + fn poll_flush(self: Pin<&mut Self>, _cx: &mut Context<'_>) -> Poll> { + Poll::Pending + } + + fn poll_close(self: Pin<&mut Self>, _cx: &mut Context<'_>) -> Poll> { + Poll::Ready(Ok(())) + } +} + +impl Stream for DummySubstream { + type Item = Result; + + fn poll_next( + self: Pin<&mut Self>, + _cx: &mut Context<'_>, + ) -> Poll>> { + Poll::Pending + } +} + +#[cfg(test)] +mod tests { + use super::*; + use futures::SinkExt; + + #[tokio::test] + async fn dummy_substream_sink() { + let mut substream = DummySubstream::new(); + + futures::future::poll_fn(|cx| match substream.poll_ready_unpin(cx) { + Poll::Pending => Poll::Ready(()), + _ => panic!("invalid event"), + }) + .await; + + assert!(Pin::new(&mut substream).start_send(bytes::Bytes::new()).is_ok()); + + futures::future::poll_fn(|cx| match substream.poll_flush_unpin(cx) { + Poll::Pending => Poll::Ready(()), + _ => panic!("invalid event"), + }) + .await; + + futures::future::poll_fn(|cx| match substream.poll_close_unpin(cx) { + Poll::Ready(Ok(())) => Poll::Ready(()), + _ => panic!("invalid event"), + }) + .await; + } +} diff --git a/client/litep2p/src/multistream_select/dialer_select.rs b/client/litep2p/src/multistream_select/dialer_select.rs new file mode 100644 index 00000000..86c22647 --- /dev/null +++ b/client/litep2p/src/multistream_select/dialer_select.rs @@ -0,0 +1,919 @@ +// Copyright 2017 Parity Technologies (UK) Ltd. +// +// Permission is hereby granted, free of charge, to any person obtaining a +// copy of this software and associated documentation files (the "Software"), +// to deal in the Software without restriction, including without limitation +// the rights to use, copy, modify, merge, publish, distribute, sublicense, +// and/or sell copies of the Software, and to permit persons to whom the +// Software is furnished to do so, subject to the following conditions: +// +// The above copyright notice and this permission notice shall be included in +// all copies or substantial portions of the Software. +// +// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS +// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE +// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER +// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING +// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER +// DEALINGS IN THE SOFTWARE. + +//! Protocol negotiation strategies for the peer acting as the dialer. + +use crate::{ + codec::unsigned_varint::UnsignedVarint, + error::{self, Error, ParseError, SubstreamError}, + multistream_select::{ + drain_trailing_protocols, + protocol::{ + webrtc_encode_multistream_message, HeaderLine, Message, MessageIO, Protocol, + ProtocolError, PROTO_MULTISTREAM_1_0, + }, + Negotiated, NegotiationError, Version, + }, + types::protocol::ProtocolName, +}; + +use bytes::{Bytes, BytesMut}; +use futures::prelude::*; +use std::{ + convert::TryFrom as _, + iter, mem, + pin::Pin, + task::{Context, Poll}, +}; + +const LOG_TARGET: &str = "litep2p::multistream-select"; + +/// Returns a `Future` that negotiates a protocol on the given I/O stream +/// for a peer acting as the _dialer_ (or _initiator_). +/// +/// This function is given an I/O stream and a list of protocols and returns a +/// computation that performs the protocol negotiation with the remote. The +/// returned `Future` resolves with the name of the negotiated protocol and +/// a [`Negotiated`] I/O stream. +/// +/// Within the scope of this library, a dialer always commits to a specific +/// multistream-select [`Version`], whereas a listener always supports +/// all versions supported by this library. Frictionless multistream-select +/// protocol upgrades may thus proceed by deployments with updated listeners, +/// eventually followed by deployments of dialers choosing the newer protocol. +pub fn dialer_select_proto( + inner: R, + protocols: I, + version: Version, +) -> DialerSelectFuture +where + R: AsyncRead + AsyncWrite, + I: IntoIterator, + I::Item: AsRef<[u8]>, +{ + let protocols = protocols.into_iter().peekable(); + DialerSelectFuture { + version, + protocols, + state: State::SendHeader { + io: MessageIO::new(inner), + }, + } +} + +/// A `Future` returned by [`dialer_select_proto`] which negotiates +/// a protocol iteratively by considering one protocol after the other. +#[pin_project::pin_project] +pub struct DialerSelectFuture { + protocols: iter::Peekable, + state: State, + version: Version, +} + +enum State { + SendHeader { + io: MessageIO, + }, + SendProtocol { + io: MessageIO, + protocol: N, + header_received: bool, + }, + FlushProtocol { + io: MessageIO, + protocol: N, + header_received: bool, + }, + AwaitProtocol { + io: MessageIO, + protocol: N, + header_received: bool, + }, + Done, +} + +impl Future for DialerSelectFuture +where + // The Unpin bound here is required because we produce + // a `Negotiated` as the output. It also makes + // the implementation considerably easier to write. + R: AsyncRead + AsyncWrite + Unpin, + I: Iterator, + I::Item: AsRef<[u8]>, +{ + type Output = Result<(I::Item, Negotiated), NegotiationError>; + + fn poll(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll { + let this = self.project(); + + loop { + match mem::replace(this.state, State::Done) { + State::SendHeader { mut io } => { + match Pin::new(&mut io).poll_ready(cx)? { + Poll::Ready(()) => {} + Poll::Pending => { + *this.state = State::SendHeader { io }; + return Poll::Pending; + } + } + + let h = HeaderLine::from(*this.version); + if let Err(err) = Pin::new(&mut io).start_send(Message::Header(h)) { + return Poll::Ready(Err(From::from(err))); + } + + let protocol = this.protocols.next().ok_or(NegotiationError::Failed)?; + + // The dialer always sends the header and the first protocol + // proposal in one go for efficiency. + *this.state = State::SendProtocol { + io, + protocol, + header_received: false, + }; + } + + State::SendProtocol { + mut io, + protocol, + header_received, + } => { + match Pin::new(&mut io).poll_ready(cx)? { + Poll::Ready(()) => {} + Poll::Pending => { + *this.state = State::SendProtocol { + io, + protocol, + header_received, + }; + return Poll::Pending; + } + } + + let p = Protocol::try_from(protocol.as_ref())?; + if let Err(err) = Pin::new(&mut io).start_send(Message::Protocol(p.clone())) { + return Poll::Ready(Err(From::from(err))); + } + tracing::debug!(target: LOG_TARGET, "Dialer: Proposed protocol: {}", p); + + if this.protocols.peek().is_some() { + *this.state = State::FlushProtocol { + io, + protocol, + header_received, + } + } else { + match this.version { + Version::V1 => + *this.state = State::FlushProtocol { + io, + protocol, + header_received, + }, + // This is the only effect that `V1Lazy` has compared to `V1`: + // Optimistically settling on the only protocol that + // the dialer supports for this negotiation. Notably, + // the dialer expects a regular `V1` response. + Version::V1Lazy => { + tracing::debug!( + target: LOG_TARGET, + "Dialer: Expecting proposed protocol: {}", + p + ); + let hl = HeaderLine::from(Version::V1Lazy); + let io = Negotiated::expecting(io.into_reader(), p, Some(hl)); + return Poll::Ready(Ok((protocol, io))); + } + } + } + } + + State::FlushProtocol { + mut io, + protocol, + header_received, + } => match Pin::new(&mut io).poll_flush(cx)? { + Poll::Ready(()) => + *this.state = State::AwaitProtocol { + io, + protocol, + header_received, + }, + Poll::Pending => { + *this.state = State::FlushProtocol { + io, + protocol, + header_received, + }; + return Poll::Pending; + } + }, + + State::AwaitProtocol { + mut io, + protocol, + header_received, + } => { + let msg = match Pin::new(&mut io).poll_next(cx)? { + Poll::Ready(Some(msg)) => msg, + Poll::Pending => { + *this.state = State::AwaitProtocol { + io, + protocol, + header_received, + }; + return Poll::Pending; + } + // Treat EOF error as [`NegotiationError::Failed`], not as + // [`NegotiationError::ProtocolError`], allowing dropping or closing an I/O + // stream as a permissible way to "gracefully" fail a negotiation. + Poll::Ready(None) => return Poll::Ready(Err(NegotiationError::Failed)), + }; + + match msg { + Message::Header(v) + if v == HeaderLine::from(*this.version) && !header_received => + { + *this.state = State::AwaitProtocol { + io, + protocol, + header_received: true, + }; + } + Message::Protocol(ref p) if p.as_ref() == protocol.as_ref() => { + tracing::debug!( + target: LOG_TARGET, + "Dialer: Received confirmation for protocol: {}", + p + ); + let io = Negotiated::completed(io.into_inner()); + return Poll::Ready(Ok((protocol, io))); + } + Message::NotAvailable => { + tracing::debug!( + target: LOG_TARGET, + "Dialer: Received rejection of protocol: {}", + String::from_utf8_lossy(protocol.as_ref()) + ); + let protocol = this.protocols.next().ok_or(NegotiationError::Failed)?; + *this.state = State::SendProtocol { + io, + protocol, + header_received, + } + } + _ => return Poll::Ready(Err(ProtocolError::InvalidMessage.into())), + } + } + + State::Done => panic!("State::poll called after completion"), + } + } + } +} + +/// `multistream-select` handshake result for dialer. +#[derive(Debug, PartialEq, Eq)] +pub enum HandshakeResult { + /// Handshake is not complete, data missing. + NotReady, + + /// Handshake has succeeded. + /// + /// The returned tuple contains the negotiated protocol and response + /// that must be sent to remote peer. + Succeeded(ProtocolName), +} + +/// Handshake state. +#[derive(Debug)] +enum HandshakeState { + /// Waiting to receive any response from remote peer. + WaitingResponse, + + /// Waiting to receive the actual application protocol from remote peer. + WaitingProtocol, +} + +/// `multistream-select` dialer handshake state. +#[derive(Debug)] +pub struct WebRtcDialerState { + /// Proposed main protocol. + protocol: ProtocolName, + + /// Fallback names of the main protocol. + fallback_names: Vec, + + /// Dialer handshake state. + state: HandshakeState, +} + +impl WebRtcDialerState { + /// Propose protocol to remote peer. + /// + /// Return [`WebRtcDialerState`] which is used to drive forward the negotiation and an encoded + /// `multistream-select` message that contains the protocol proposal for the substream. + pub fn propose( + protocol: ProtocolName, + fallback_names: Vec, + ) -> crate::Result<(Self, Vec)> { + let message = webrtc_encode_multistream_message( + std::iter::once(protocol.clone()) + .chain(fallback_names.clone()) + .filter_map(|protocol| Protocol::try_from(protocol.as_ref()).ok()) + .map(Message::Protocol), + )? + .freeze() + .to_vec(); + + Ok(( + Self { + protocol, + fallback_names, + state: HandshakeState::WaitingResponse, + }, + message, + )) + } + + /// Register response to [`WebRtcDialerState`]. + pub fn register_response( + &mut self, + payload: Vec, + ) -> Result { + // All multistream-select messages are length-prefixed. Since this code path is not using + // multistream_select::protocol::MessageIO, we need to decode and remove the length here. + let remaining: &[u8] = &payload; + let (len, tail) = unsigned_varint::decode::usize(remaining).map_err(|error| { + tracing::debug!( + target: LOG_TARGET, + ?error, + message = ?payload, + "Failed to decode length-prefix in multistream message"); + error::NegotiationError::ParseError(ParseError::InvalidData) + })?; + + let len_size = remaining.len() - tail.len(); + let bytes = Bytes::from(payload); + let payload = bytes.slice(len_size..len_size + len); + let remaining = bytes.slice(len_size + len..); + let message = Message::decode(payload); + + tracing::trace!( + target: LOG_TARGET, + ?message, + "Decoded message while registering response", + ); + + let mut protocols = match message { + Ok(Message::Header(HeaderLine::V1)) => { + vec![PROTO_MULTISTREAM_1_0] + } + Ok(Message::Protocol(protocol)) => vec![protocol], + Ok(Message::Protocols(protocols)) => protocols, + Ok(Message::NotAvailable) => + return match &self.state { + HandshakeState::WaitingProtocol => Err( + error::NegotiationError::MultistreamSelectError(NegotiationError::Failed), + ), + _ => Err(error::NegotiationError::StateMismatch), + }, + Ok(Message::ListProtocols) => return Err(error::NegotiationError::StateMismatch), + Err(_) => return Err(error::NegotiationError::ParseError(ParseError::InvalidData)), + }; + + match drain_trailing_protocols(remaining) { + Ok(protos) => protocols.extend(protos), + Err(error) => return Err(error), + } + + let mut protocol_iter = protocols.into_iter(); + loop { + match (&self.state, protocol_iter.next()) { + (HandshakeState::WaitingResponse, None) => + return Err(crate::error::NegotiationError::StateMismatch), + (HandshakeState::WaitingResponse, Some(protocol)) => { + if protocol == PROTO_MULTISTREAM_1_0 { + self.state = HandshakeState::WaitingProtocol; + } else { + return Err(crate::error::NegotiationError::MultistreamSelectError( + NegotiationError::Failed, + )); + } + } + (HandshakeState::WaitingProtocol, Some(protocol)) => { + if protocol == PROTO_MULTISTREAM_1_0 { + return Err(crate::error::NegotiationError::StateMismatch); + } + + if self.protocol.as_bytes() == protocol.as_ref() { + return Ok(HandshakeResult::Succeeded(self.protocol.clone())); + } + + for fallback in &self.fallback_names { + if fallback.as_bytes() == protocol.as_ref() { + return Ok(HandshakeResult::Succeeded(fallback.clone())); + } + } + + return Err(crate::error::NegotiationError::MultistreamSelectError( + NegotiationError::Failed, + )); + } + (HandshakeState::WaitingProtocol, None) => { + return Ok(HandshakeResult::NotReady); + } + } + } + } +} + +#[cfg(test)] +mod tests { + use super::*; + use crate::multistream_select::{listener_select_proto, protocol::MSG_MULTISTREAM_1_0}; + use bytes::BufMut; + use std::time::Duration; + #[tokio::test] + async fn select_proto_basic() { + async fn run(version: Version) { + let (client_connection, server_connection) = futures_ringbuf::Endpoint::pair(100, 100); + + let server: tokio::task::JoinHandle> = tokio::spawn(async move { + let protos = vec!["/proto1", "/proto2"]; + let (proto, mut io) = + listener_select_proto(server_connection, protos).await.unwrap(); + assert_eq!(proto, "/proto2"); + + let mut out = vec![0; 32]; + let n = io.read(&mut out).await.unwrap(); + out.truncate(n); + assert_eq!(out, b"ping"); + + io.write_all(b"pong").await.unwrap(); + io.flush().await.unwrap(); + + Ok(()) + }); + + let client: tokio::task::JoinHandle> = tokio::spawn(async move { + let protos = vec!["/proto3", "/proto2"]; + let (proto, mut io) = + dialer_select_proto(client_connection, protos, version).await.unwrap(); + assert_eq!(proto, "/proto2"); + + io.write_all(b"ping").await.unwrap(); + io.flush().await.unwrap(); + + let mut out = vec![0; 32]; + let n = io.read(&mut out).await.unwrap(); + out.truncate(n); + assert_eq!(out, b"pong"); + + Ok(()) + }); + + server.await.unwrap(); + client.await.unwrap(); + } + + run(Version::V1).await; + run(Version::V1Lazy).await; + } + + /// Tests the expected behaviour of failed negotiations. + #[tokio::test] + async fn negotiation_failed() { + async fn run( + version: Version, + dial_protos: Vec<&'static str>, + dial_payload: Vec, + listen_protos: Vec<&'static str>, + ) { + let (client_connection, server_connection) = futures_ringbuf::Endpoint::pair(100, 100); + + let server: tokio::task::JoinHandle> = tokio::spawn(async move { + let io = match tokio::time::timeout( + Duration::from_secs(2), + listener_select_proto(server_connection, listen_protos), + ) + .await + .unwrap() + { + Ok((_, io)) => io, + Err(NegotiationError::Failed) => return Ok(()), + Err(NegotiationError::ProtocolError(e)) => { + panic!("Unexpected protocol error {e}") + } + }; + match io.complete().await { + Err(NegotiationError::Failed) => {} + _ => panic!(), + } + + Ok(()) + }); + + let client: tokio::task::JoinHandle> = tokio::spawn(async move { + let mut io = match tokio::time::timeout( + Duration::from_secs(2), + dialer_select_proto(client_connection, dial_protos, version), + ) + .await + .unwrap() + { + Err(NegotiationError::Failed) => return Ok(()), + Ok((_, io)) => io, + Err(_) => panic!(), + }; + + // The dialer may write a payload that is even sent before it + // got confirmation of the last proposed protocol, when `V1Lazy` + // is used. + io.write_all(&dial_payload).await.unwrap(); + match io.complete().await { + Err(NegotiationError::Failed) => {} + _ => panic!(), + } + + Ok(()) + }); + + server.await.unwrap(); + client.await.unwrap(); + } + + // Incompatible protocols. + run(Version::V1, vec!["/proto1"], vec![1], vec!["/proto2"]).await; + run(Version::V1Lazy, vec!["/proto1"], vec![1], vec!["/proto2"]).await; + } + + #[tokio::test] + async fn v1_lazy_do_not_wait_for_negotiation_on_poll_close() { + let (client_connection, _server_connection) = + futures_ringbuf::Endpoint::pair(1024 * 1024, 1); + + let client = tokio::spawn(async move { + // Single protocol to allow for lazy (or optimistic) protocol negotiation. + let protos = vec!["/proto1"]; + let (proto, mut io) = + dialer_select_proto(client_connection, protos, Version::V1Lazy).await.unwrap(); + assert_eq!(proto, "/proto1"); + + // In Libp2p the lazy negotation of protocols can be closed at any time, + // even if the negotiation is not yet done. + + // However, for the Litep2p the negotation must conclude before closing the + // lazy negotation of protocol. We'll wait for the close until the + // server has produced a message, in this test that means forever. + io.close().await.unwrap(); + }); + + assert!(tokio::time::timeout(Duration::from_secs(10), client).await.is_ok()); + } + + #[tokio::test] + async fn low_level_negotiate() { + async fn run(version: Version) { + let (client_connection, mut server_connection) = + futures_ringbuf::Endpoint::pair(100, 100); + + let server = tokio::spawn(async move { + let protos = ["/proto2"]; + + let multistream = b"/multistream/1.0.0\n"; + let len = multistream.len(); + let proto = b"/proto2\n"; + let proto_len = proto.len(); + + // Check that our implementation writes optimally + // the multistream ++ protocol in a single message. + let mut expected_message = Vec::new(); + expected_message.push(len as u8); + expected_message.extend_from_slice(multistream); + expected_message.push(proto_len as u8); + expected_message.extend_from_slice(proto); + + if version == Version::V1Lazy { + expected_message.extend_from_slice(b"ping"); + } + + let mut out = vec![0; 64]; + let n = server_connection.read(&mut out).await.unwrap(); + out.truncate(n); + assert_eq!(out, expected_message); + + // We must send the back the multistream packet. + let mut send_message = Vec::new(); + send_message.push(len as u8); + send_message.extend_from_slice(multistream); + + server_connection.write_all(&mut send_message).await.unwrap(); + + let mut send_message = Vec::new(); + send_message.push(proto_len as u8); + send_message.extend_from_slice(proto); + server_connection.write_all(&mut send_message).await.unwrap(); + + // Handle handshake. + match version { + Version::V1 => { + let mut out = vec![0; 64]; + let n = server_connection.read(&mut out).await.unwrap(); + out.truncate(n); + assert_eq!(out, b"ping"); + + server_connection.write_all(b"pong").await.unwrap(); + } + Version::V1Lazy => { + // Ping (handshake) payload expected in the initial message. + server_connection.write_all(b"pong").await.unwrap(); + } + } + }); + + let client = tokio::spawn(async move { + let protos = vec!["/proto2"]; + let (proto, mut io) = + dialer_select_proto(client_connection, protos, version).await.unwrap(); + assert_eq!(proto, "/proto2"); + + io.write_all(b"ping").await.unwrap(); + io.flush().await.unwrap(); + + let mut out = vec![0; 32]; + let n = io.read(&mut out).await.unwrap(); + out.truncate(n); + assert_eq!(out, b"pong"); + }); + + server.await.unwrap(); + client.await.unwrap(); + } + + run(Version::V1).await; + run(Version::V1Lazy).await; + } + + #[tokio::test] + async fn v1_low_level_negotiate_multiple_headers() { + let (client_connection, mut server_connection) = futures_ringbuf::Endpoint::pair(100, 100); + + let server = tokio::spawn(async move { + let protos = ["/proto2"]; + + let multistream = b"/multistream/1.0.0\n"; + let len = multistream.len(); + let proto = b"/proto2\n"; + let proto_len = proto.len(); + + // Check that our implementation writes optimally + // the multistream ++ protocol in a single message. + let mut expected_message = Vec::new(); + expected_message.push(len as u8); + expected_message.extend_from_slice(multistream); + expected_message.push(proto_len as u8); + expected_message.extend_from_slice(proto); + + let mut out = vec![0; 64]; + let n = server_connection.read(&mut out).await.unwrap(); + out.truncate(n); + assert_eq!(out, expected_message); + + // We must send the back the multistream packet. + let mut send_message = Vec::new(); + send_message.push(len as u8); + send_message.extend_from_slice(multistream); + + server_connection.write_all(&mut send_message).await.unwrap(); + + // We must send the back the multistream packet again. + let mut send_message = Vec::new(); + send_message.push(len as u8); + send_message.extend_from_slice(multistream); + + server_connection.write_all(&mut send_message).await.unwrap(); + }); + + let client = tokio::spawn(async move { + let protos = vec!["/proto2"]; + + // Negotiation fails because the protocol receives the `/multistream/1.0.0` header + // multiple times. + let result = + dialer_select_proto(client_connection, protos, Version::V1).await.unwrap_err(); + match result { + NegotiationError::ProtocolError(ProtocolError::InvalidMessage) => {} + _ => panic!("unexpected error: {:?}", result), + }; + }); + + server.await.unwrap(); + client.await.unwrap(); + } + + #[tokio::test] + async fn v1_lazy_low_level_negotiate_multiple_headers() { + let (client_connection, mut server_connection) = futures_ringbuf::Endpoint::pair(100, 100); + + let server = tokio::spawn(async move { + let protos = ["/proto2"]; + + let multistream = b"/multistream/1.0.0\n"; + let len = multistream.len(); + let proto = b"/proto2\n"; + let proto_len = proto.len(); + + // Check that our implementation writes optimally + // the multistream ++ protocol in a single message. + let mut expected_message = Vec::new(); + expected_message.push(len as u8); + expected_message.extend_from_slice(multistream); + expected_message.push(proto_len as u8); + expected_message.extend_from_slice(proto); + + let mut out = vec![0; 64]; + let n = server_connection.read(&mut out).await.unwrap(); + out.truncate(n); + assert_eq!(out, expected_message); + + // We must send the back the multistream packet. + let mut send_message = Vec::new(); + send_message.push(len as u8); + send_message.extend_from_slice(multistream); + + server_connection.write_all(&mut send_message).await.unwrap(); + + // We must send the back the multistream packet again. + let mut send_message = Vec::new(); + send_message.push(len as u8); + send_message.extend_from_slice(multistream); + + server_connection.write_all(&mut send_message).await.unwrap(); + }); + + let client = tokio::spawn(async move { + let protos = vec!["/proto2"]; + + // Negotiation fails because the protocol receives the `/multistream/1.0.0` header + // multiple times. + let (proto, to_negociate) = + dialer_select_proto(client_connection, protos, Version::V1Lazy).await.unwrap(); + assert_eq!(proto, "/proto2"); + + let result = to_negociate.complete().await.unwrap_err(); + + match result { + NegotiationError::ProtocolError(ProtocolError::InvalidMessage) => {} + _ => panic!("unexpected error: {:?}", result), + }; + }); + + server.await.unwrap(); + client.await.unwrap(); + } + + #[test] + fn propose() { + let (mut dialer_state, message) = + WebRtcDialerState::propose(ProtocolName::from("/13371338/proto/1"), vec![]).unwrap(); + + let mut bytes = BytesMut::with_capacity(32); + bytes.put_u8(MSG_MULTISTREAM_1_0.len() as u8); + let _ = Message::Header(HeaderLine::V1).encode(&mut bytes).unwrap(); + + let proto = Protocol::try_from(&b"/13371338/proto/1"[..]).expect("valid protocol name"); + bytes.put_u8((proto.as_ref().len() + 1) as u8); // + 1 for \n + let _ = Message::Protocol(proto).encode(&mut bytes).unwrap(); + + let expected_message = bytes.freeze().to_vec(); + + assert_eq!(message, expected_message); + } + + #[test] + fn propose_with_fallback() { + let (mut dialer_state, message) = WebRtcDialerState::propose( + ProtocolName::from("/13371338/proto/1"), + vec![ProtocolName::from("/sup/proto/1")], + ) + .unwrap(); + + let mut bytes = BytesMut::with_capacity(32); + bytes.put_u8(MSG_MULTISTREAM_1_0.len() as u8); + let _ = Message::Header(HeaderLine::V1).encode(&mut bytes).unwrap(); + + let proto1 = Protocol::try_from(&b"/13371338/proto/1"[..]).expect("valid protocol name"); + bytes.put_u8((proto1.as_ref().len() + 1) as u8); // + 1 for \n + let _ = Message::Protocol(proto1).encode(&mut bytes).unwrap(); + + let proto2 = Protocol::try_from(&b"/sup/proto/1"[..]).expect("valid protocol name"); + bytes.put_u8((proto2.as_ref().len() + 1) as u8); // + 1 for \n + let _ = Message::Protocol(proto2).encode(&mut bytes).unwrap(); + + let expected_message = bytes.freeze().to_vec(); + + assert_eq!(message, expected_message); + } + + #[test] + fn register_response_header_only() { + let mut bytes = BytesMut::with_capacity(32); + bytes.put_u8(MSG_MULTISTREAM_1_0.len() as u8); + + let message = Message::Header(HeaderLine::V1); + message.encode(&mut bytes).map_err(|_| Error::InvalidData).unwrap(); + + let (mut dialer_state, _message) = + WebRtcDialerState::propose(ProtocolName::from("/13371338/proto/1"), vec![]).unwrap(); + + match dialer_state.register_response(bytes.freeze().to_vec()) { + Ok(HandshakeResult::NotReady) => {} + Err(err) => panic!("unexpected error: {:?}", err), + event => panic!("invalid event: {event:?}"), + } + } + + #[test] + fn header_line_missing() { + // header line missing + let proto = b"/13371338/proto/1"; + let mut bytes = BytesMut::with_capacity(proto.len() + 2); + bytes.put_u8((proto.len() + 1) as u8); + + let response = Message::Protocol(Protocol::try_from(&proto[..]).unwrap()) + .encode(&mut bytes) + .expect("valid message encodes"); + + let response = bytes.freeze().to_vec(); + + let (mut dialer_state, _message) = + WebRtcDialerState::propose(ProtocolName::from("/13371338/proto/1"), vec![]).unwrap(); + + match dialer_state.register_response(response) { + Err(error::NegotiationError::MultistreamSelectError(NegotiationError::Failed)) => {} + event => panic!("invalid event: {event:?}"), + } + } + + #[test] + fn negotiate_main_protocol() { + let message = webrtc_encode_multistream_message(vec![Message::Protocol( + Protocol::try_from(&b"/13371338/proto/1"[..]).unwrap(), + )]) + .unwrap() + .freeze(); + + let (mut dialer_state, _message) = WebRtcDialerState::propose( + ProtocolName::from("/13371338/proto/1"), + vec![ProtocolName::from("/sup/proto/1")], + ) + .unwrap(); + + match dialer_state.register_response(message.to_vec()) { + Ok(HandshakeResult::Succeeded(negotiated)) => { + assert_eq!(negotiated, ProtocolName::from("/13371338/proto/1")) + } + event => panic!("invalid event {event:?}"), + } + } + + #[test] + fn negotiate_fallback_protocol() { + let message = webrtc_encode_multistream_message(vec![Message::Protocol( + Protocol::try_from(&b"/sup/proto/1"[..]).unwrap(), + )]) + .unwrap() + .freeze(); + + let (mut dialer_state, _message) = WebRtcDialerState::propose( + ProtocolName::from("/13371338/proto/1"), + vec![ProtocolName::from("/sup/proto/1")], + ) + .unwrap(); + + match dialer_state.register_response(message.to_vec()) { + Ok(HandshakeResult::Succeeded(negotiated)) => { + assert_eq!(negotiated, ProtocolName::from("/sup/proto/1")) + } + _ => panic!("invalid event"), + } + } +} diff --git a/client/litep2p/src/multistream_select/length_delimited.rs b/client/litep2p/src/multistream_select/length_delimited.rs new file mode 100644 index 00000000..7052d629 --- /dev/null +++ b/client/litep2p/src/multistream_select/length_delimited.rs @@ -0,0 +1,378 @@ +// Copyright 2017 Parity Technologies (UK) Ltd. +// +// Permission is hereby granted, free of charge, to any person obtaining a +// copy of this software and associated documentation files (the "Software"), +// to deal in the Software without restriction, including without limitation +// the rights to use, copy, modify, merge, publish, distribute, sublicense, +// and/or sell copies of the Software, and to permit persons to whom the +// Software is furnished to do so, subject to the following conditions: +// +// The above copyright notice and this permission notice shall be included in +// all copies or substantial portions of the Software. +// +// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS +// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE +// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER +// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING +// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER +// DEALINGS IN THE SOFTWARE. + +use bytes::{Buf as _, BufMut as _, Bytes, BytesMut}; +use futures::{io::IoSlice, prelude::*}; +use std::{ + convert::TryFrom as _, + io, + pin::Pin, + task::{Context, Poll}, +}; + +const MAX_LEN_BYTES: u16 = 2; +const MAX_FRAME_SIZE: u16 = (1 << (MAX_LEN_BYTES * 8 - MAX_LEN_BYTES)) - 1; +const DEFAULT_BUFFER_SIZE: usize = 64; +const LOG_TARGET: &str = "litep2p::multistream-select"; + +/// A `Stream` and `Sink` for unsigned-varint length-delimited frames, +/// wrapping an underlying `AsyncRead + AsyncWrite` I/O resource. +/// +/// We purposely only support a frame sizes up to 16KiB (2 bytes unsigned varint +/// frame length). Frames mostly consist in a short protocol name, which is highly +/// unlikely to be more than 16KiB long. +#[pin_project::pin_project] +#[derive(Debug)] +pub struct LengthDelimited { + /// The inner I/O resource. + #[pin] + inner: R, + /// Read buffer for a single incoming unsigned-varint length-delimited frame. + read_buffer: BytesMut, + /// Write buffer for outgoing unsigned-varint length-delimited frames. + write_buffer: BytesMut, + /// The current read state, alternating between reading a frame + /// length and reading a frame payload. + read_state: ReadState, +} + +#[derive(Debug, Copy, Clone, PartialEq, Eq)] +enum ReadState { + /// We are currently reading the length of the next frame of data. + ReadLength { + buf: [u8; MAX_LEN_BYTES as usize], + pos: usize, + }, + /// We are currently reading the frame of data itself. + ReadData { len: u16, pos: usize }, +} + +impl Default for ReadState { + fn default() -> Self { + ReadState::ReadLength { + buf: [0; MAX_LEN_BYTES as usize], + pos: 0, + } + } +} + +impl LengthDelimited { + /// Creates a new I/O resource for reading and writing unsigned-varint + /// length delimited frames. + pub fn new(inner: R) -> LengthDelimited { + LengthDelimited { + inner, + read_state: ReadState::default(), + read_buffer: BytesMut::with_capacity(DEFAULT_BUFFER_SIZE), + write_buffer: BytesMut::with_capacity(DEFAULT_BUFFER_SIZE + MAX_LEN_BYTES as usize), + } + } + + /// Drops the [`LengthDelimited`] resource, yielding the underlying I/O stream. + /// + /// # Panic + /// + /// Will panic if called while there is data in the read or write buffer. + /// The read buffer is guaranteed to be empty whenever `Stream::poll` yields + /// a new `Bytes` frame. The write buffer is guaranteed to be empty after + /// flushing. + pub fn into_inner(self) -> R { + assert!(self.read_buffer.is_empty()); + assert!(self.write_buffer.is_empty()); + self.inner + } + + /// Converts the [`LengthDelimited`] into a [`LengthDelimitedReader`], dropping the + /// uvi-framed `Sink` in favour of direct `AsyncWrite` access to the underlying + /// I/O stream. + /// + /// This is typically done if further uvi-framed messages are expected to be + /// received but no more such messages are written, allowing the writing of + /// follow-up protocol data to commence. + pub fn into_reader(self) -> LengthDelimitedReader { + LengthDelimitedReader { inner: self } + } + + /// Writes all buffered frame data to the underlying I/O stream, + /// _without flushing it_. + /// + /// After this method returns `Poll::Ready`, the write buffer of frames + /// submitted to the `Sink` is guaranteed to be empty. + pub fn poll_write_buffer( + self: Pin<&mut Self>, + cx: &mut Context<'_>, + ) -> Poll> + where + R: AsyncWrite, + { + let mut this = self.project(); + + while !this.write_buffer.is_empty() { + match this.inner.as_mut().poll_write(cx, this.write_buffer) { + Poll::Pending => return Poll::Pending, + Poll::Ready(Ok(0)) => + return Poll::Ready(Err(io::Error::new( + io::ErrorKind::WriteZero, + "Failed to write buffered frame.", + ))), + Poll::Ready(Ok(n)) => this.write_buffer.advance(n), + Poll::Ready(Err(err)) => return Poll::Ready(Err(err)), + } + } + + Poll::Ready(Ok(())) + } +} + +impl Stream for LengthDelimited +where + R: AsyncRead, +{ + type Item = Result; + + fn poll_next(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll> { + let mut this = self.project(); + + loop { + match this.read_state { + ReadState::ReadLength { buf, pos } => { + match this.inner.as_mut().poll_read(cx, &mut buf[*pos..*pos + 1]) { + Poll::Ready(Ok(0)) => + if *pos == 0 { + return Poll::Ready(None); + } else { + return Poll::Ready(Some(Err(io::ErrorKind::UnexpectedEof.into()))); + }, + Poll::Ready(Ok(n)) => { + debug_assert_eq!(n, 1); + *pos += n; + } + Poll::Ready(Err(err)) => return Poll::Ready(Some(Err(err))), + Poll::Pending => return Poll::Pending, + }; + + if (buf[*pos - 1] & 0x80) == 0 { + // MSB is not set, indicating the end of the length prefix. + let (len, _) = unsigned_varint::decode::u16(buf).map_err(|e| { + tracing::debug!(target: LOG_TARGET, "invalid length prefix: {}", e); + io::Error::new(io::ErrorKind::InvalidData, "invalid length prefix") + })?; + + if len >= 1 { + *this.read_state = ReadState::ReadData { len, pos: 0 }; + this.read_buffer.resize(len as usize, 0); + } else { + debug_assert_eq!(len, 0); + *this.read_state = ReadState::default(); + return Poll::Ready(Some(Ok(Bytes::new()))); + } + } else if *pos == MAX_LEN_BYTES as usize { + // MSB signals more length bytes but we have already read the maximum. + // See the module documentation about the max frame len. + return Poll::Ready(Some(Err(io::Error::new( + io::ErrorKind::InvalidData, + "Maximum frame length exceeded", + )))); + } + } + ReadState::ReadData { len, pos } => { + match this.inner.as_mut().poll_read(cx, &mut this.read_buffer[*pos..]) { + Poll::Ready(Ok(0)) => + return Poll::Ready(Some(Err(io::ErrorKind::UnexpectedEof.into()))), + Poll::Ready(Ok(n)) => *pos += n, + Poll::Pending => return Poll::Pending, + Poll::Ready(Err(err)) => return Poll::Ready(Some(Err(err))), + }; + + if *pos == *len as usize { + // Finished reading the frame. + let frame = this.read_buffer.split_off(0).freeze(); + *this.read_state = ReadState::default(); + return Poll::Ready(Some(Ok(frame))); + } + } + } + } + } +} + +impl Sink for LengthDelimited +where + R: AsyncWrite, +{ + type Error = io::Error; + + fn poll_ready(mut self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll> { + // Use the maximum frame length also as a (soft) upper limit + // for the entire write buffer. The actual (hard) limit is thus + // implied to be roughly 2 * MAX_FRAME_SIZE. + if self.as_mut().project().write_buffer.len() >= MAX_FRAME_SIZE as usize { + match self.as_mut().poll_write_buffer(cx) { + Poll::Ready(Ok(())) => {} + Poll::Ready(Err(err)) => return Poll::Ready(Err(err)), + Poll::Pending => return Poll::Pending, + } + + debug_assert!(self.as_mut().project().write_buffer.is_empty()); + } + + Poll::Ready(Ok(())) + } + + fn start_send(self: Pin<&mut Self>, item: Bytes) -> Result<(), Self::Error> { + let this = self.project(); + + let len = match u16::try_from(item.len()) { + Ok(len) if len <= MAX_FRAME_SIZE => len, + _ => + return Err(io::Error::new( + io::ErrorKind::InvalidData, + "Maximum frame size exceeded.", + )), + }; + + let mut uvi_buf = unsigned_varint::encode::u16_buffer(); + let uvi_len = unsigned_varint::encode::u16(len, &mut uvi_buf); + this.write_buffer.reserve(len as usize + uvi_len.len()); + this.write_buffer.put(uvi_len); + this.write_buffer.put(item); + + Ok(()) + } + + fn poll_flush(mut self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll> { + // Write all buffered frame data to the underlying I/O stream. + match LengthDelimited::poll_write_buffer(self.as_mut(), cx) { + Poll::Ready(Ok(())) => {} + Poll::Ready(Err(err)) => return Poll::Ready(Err(err)), + Poll::Pending => return Poll::Pending, + } + + let this = self.project(); + debug_assert!(this.write_buffer.is_empty()); + + // Flush the underlying I/O stream. + this.inner.poll_flush(cx) + } + + fn poll_close(mut self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll> { + // Write all buffered frame data to the underlying I/O stream. + match LengthDelimited::poll_write_buffer(self.as_mut(), cx) { + Poll::Ready(Ok(())) => {} + Poll::Ready(Err(err)) => return Poll::Ready(Err(err)), + Poll::Pending => return Poll::Pending, + } + + let this = self.project(); + debug_assert!(this.write_buffer.is_empty()); + + // Close the underlying I/O stream. + this.inner.poll_close(cx) + } +} + +/// A `LengthDelimitedReader` implements a `Stream` of uvi-length-delimited +/// frames on an underlying I/O resource combined with direct `AsyncWrite` access. +#[pin_project::pin_project] +#[derive(Debug)] +pub struct LengthDelimitedReader { + #[pin] + inner: LengthDelimited, +} + +impl LengthDelimitedReader { + /// Destroys the `LengthDelimitedReader` and returns the underlying I/O stream. + /// + /// This method is guaranteed not to drop any data read from or not yet + /// submitted to the underlying I/O stream. + /// + /// # Panic + /// + /// Will panic if called while there is data in the read or write buffer. + /// The read buffer is guaranteed to be empty whenever [`Stream::poll_next`] + /// yield a new `Message`. The write buffer is guaranteed to be empty whenever + /// [`LengthDelimited::poll_write_buffer`] yields [`Poll::Ready`] or after + /// the [`Sink`] has been completely flushed via [`Sink::poll_flush`]. + pub fn into_inner(self) -> R { + self.inner.into_inner() + } +} + +impl Stream for LengthDelimitedReader +where + R: AsyncRead, +{ + type Item = Result; + + fn poll_next(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll> { + self.project().inner.poll_next(cx) + } +} + +impl AsyncWrite for LengthDelimitedReader +where + R: AsyncWrite, +{ + fn poll_write( + self: Pin<&mut Self>, + cx: &mut Context<'_>, + buf: &[u8], + ) -> Poll> { + // `this` here designates the `LengthDelimited`. + let mut this = self.project().inner; + + // We need to flush any data previously written with the `LengthDelimited`. + match LengthDelimited::poll_write_buffer(this.as_mut(), cx) { + Poll::Ready(Ok(())) => {} + Poll::Ready(Err(err)) => return Poll::Ready(Err(err)), + Poll::Pending => return Poll::Pending, + } + debug_assert!(this.write_buffer.is_empty()); + + this.project().inner.poll_write(cx, buf) + } + + fn poll_flush(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll> { + self.project().inner.poll_flush(cx) + } + + fn poll_close(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll> { + self.project().inner.poll_close(cx) + } + + fn poll_write_vectored( + self: Pin<&mut Self>, + cx: &mut Context<'_>, + bufs: &[IoSlice<'_>], + ) -> Poll> { + // `this` here designates the `LengthDelimited`. + let mut this = self.project().inner; + + // We need to flush any data previously written with the `LengthDelimited`. + match LengthDelimited::poll_write_buffer(this.as_mut(), cx) { + Poll::Ready(Ok(())) => {} + Poll::Ready(Err(err)) => return Poll::Ready(Err(err)), + Poll::Pending => return Poll::Pending, + } + debug_assert!(this.write_buffer.is_empty()); + + this.project().inner.poll_write_vectored(cx, bufs) + } +} diff --git a/client/litep2p/src/multistream_select/listener_select.rs b/client/litep2p/src/multistream_select/listener_select.rs new file mode 100644 index 00000000..6faa2fe0 --- /dev/null +++ b/client/litep2p/src/multistream_select/listener_select.rs @@ -0,0 +1,555 @@ +// Copyright 2017 Parity Technologies (UK) Ltd. +// +// Permission is hereby granted, free of charge, to any person obtaining a +// copy of this software and associated documentation files (the "Software"), +// to deal in the Software without restriction, including without limitation +// the rights to use, copy, modify, merge, publish, distribute, sublicense, +// and/or sell copies of the Software, and to permit persons to whom the +// Software is furnished to do so, subject to the following conditions: +// +// The above copyright notice and this permission notice shall be included in +// all copies or substantial portions of the Software. +// +// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS +// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE +// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER +// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING +// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER +// DEALINGS IN THE SOFTWARE. + +//! Protocol negotiation strategies for the peer acting as the listener +//! in a multistream-select protocol negotiation. + +use crate::{ + codec::unsigned_varint::UnsignedVarint, + error::{self, Error}, + multistream_select::{ + drain_trailing_protocols, + protocol::{ + webrtc_encode_multistream_message, HeaderLine, Message, MessageIO, Protocol, + ProtocolError, PROTO_MULTISTREAM_1_0, + }, + Negotiated, NegotiationError, + }, + types::protocol::ProtocolName, +}; + +use bytes::{Bytes, BytesMut}; +use futures::prelude::*; +use smallvec::SmallVec; +use std::{ + convert::TryFrom as _, + iter::FromIterator, + mem, + pin::Pin, + task::{Context, Poll}, +}; + +const LOG_TARGET: &str = "litep2p::multistream-select"; + +/// Returns a `Future` that negotiates a protocol on the given I/O stream +/// for a peer acting as the _listener_ (or _responder_). +/// +/// This function is given an I/O stream and a list of protocols and returns a +/// computation that performs the protocol negotiation with the remote. The +/// returned `Future` resolves with the name of the negotiated protocol and +/// a [`Negotiated`] I/O stream. +pub fn listener_select_proto(inner: R, protocols: I) -> ListenerSelectFuture +where + R: AsyncRead + AsyncWrite, + I: IntoIterator, + I::Item: AsRef<[u8]>, +{ + let protocols = protocols.into_iter().filter_map(|n| match Protocol::try_from(n.as_ref()) { + Ok(p) => Some((n, p)), + Err(e) => { + tracing::warn!( + target: LOG_TARGET, + "Listener: Ignoring invalid protocol: {} due to {}", + String::from_utf8_lossy(n.as_ref()), + e + ); + None + } + }); + ListenerSelectFuture { + protocols: SmallVec::from_iter(protocols), + state: State::RecvHeader { + io: MessageIO::new(inner), + }, + last_sent_na: false, + } +} + +/// The `Future` returned by [`listener_select_proto`] that performs a +/// multistream-select protocol negotiation on an underlying I/O stream. +#[pin_project::pin_project] +pub struct ListenerSelectFuture { + protocols: SmallVec<[(N, Protocol); 8]>, + state: State, + /// Whether the last message sent was a protocol rejection (i.e. `na\n`). + /// + /// If the listener reads garbage or EOF after such a rejection, + /// the dialer is likely using `V1Lazy` and negotiation must be + /// considered failed, but not with a protocol violation or I/O + /// error. + last_sent_na: bool, +} + +enum State { + RecvHeader { + io: MessageIO, + }, + SendHeader { + io: MessageIO, + }, + RecvMessage { + io: MessageIO, + }, + SendMessage { + io: MessageIO, + message: Message, + protocol: Option, + }, + Flush { + io: MessageIO, + protocol: Option, + }, + Done, +} + +impl Future for ListenerSelectFuture +where + // The Unpin bound here is required because we + // produce a `Negotiated` as the output. + // It also makes the implementation considerably + // easier to write. + R: AsyncRead + AsyncWrite + Unpin, + N: AsRef<[u8]> + Clone, +{ + type Output = Result<(N, Negotiated), NegotiationError>; + + fn poll(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll { + let this = self.project(); + + loop { + match mem::replace(this.state, State::Done) { + State::RecvHeader { mut io } => { + match io.poll_next_unpin(cx) { + Poll::Ready(Some(Ok(Message::Header(h)))) => match h { + HeaderLine::V1 => *this.state = State::SendHeader { io }, + }, + Poll::Ready(Some(Ok(_))) => + return Poll::Ready(Err(ProtocolError::InvalidMessage.into())), + Poll::Ready(Some(Err(err))) => return Poll::Ready(Err(From::from(err))), + // Treat EOF error as [`NegotiationError::Failed`], not as + // [`NegotiationError::ProtocolError`], allowing dropping or closing an I/O + // stream as a permissible way to "gracefully" fail a negotiation. + Poll::Ready(None) => return Poll::Ready(Err(NegotiationError::Failed)), + Poll::Pending => { + *this.state = State::RecvHeader { io }; + return Poll::Pending; + } + } + } + + State::SendHeader { mut io } => { + match Pin::new(&mut io).poll_ready(cx) { + Poll::Pending => { + *this.state = State::SendHeader { io }; + return Poll::Pending; + } + Poll::Ready(Ok(())) => {} + Poll::Ready(Err(err)) => return Poll::Ready(Err(From::from(err))), + } + + let msg = Message::Header(HeaderLine::V1); + if let Err(err) = Pin::new(&mut io).start_send(msg) { + return Poll::Ready(Err(From::from(err))); + } + + *this.state = State::Flush { io, protocol: None }; + } + + State::RecvMessage { mut io } => { + let msg = match Pin::new(&mut io).poll_next(cx) { + Poll::Ready(Some(Ok(msg))) => msg, + // Treat EOF error as [`NegotiationError::Failed`], not as + // [`NegotiationError::ProtocolError`], allowing dropping or closing an I/O + // stream as a permissible way to "gracefully" fail a negotiation. + // + // This is e.g. important when a listener rejects a protocol with + // [`Message::NotAvailable`] and the dialer does not have alternative + // protocols to propose. Then the dialer will stop the negotiation and drop + // the corresponding stream. As a listener this EOF should be interpreted as + // a failed negotiation. + Poll::Ready(None) => return Poll::Ready(Err(NegotiationError::Failed)), + Poll::Pending => { + *this.state = State::RecvMessage { io }; + return Poll::Pending; + } + Poll::Ready(Some(Err(err))) => { + if *this.last_sent_na { + // When we read garbage or EOF after having already rejected a + // protocol, the dialer is most likely using `V1Lazy` and has + // optimistically settled on this protocol, so this is really a + // failed negotiation, not a protocol violation. In this case + // the dialer also raises `NegotiationError::Failed` when finally + // reading the `N/A` response. + if let ProtocolError::InvalidMessage = &err { + tracing::trace!( + target: LOG_TARGET, + "Listener: Negotiation failed with invalid \ + message after protocol rejection." + ); + return Poll::Ready(Err(NegotiationError::Failed)); + } + if let ProtocolError::IoError(e) = &err { + if e.kind() == std::io::ErrorKind::UnexpectedEof { + tracing::trace!( + target: LOG_TARGET, + "Listener: Negotiation failed with EOF \ + after protocol rejection." + ); + return Poll::Ready(Err(NegotiationError::Failed)); + } + } + } + + return Poll::Ready(Err(From::from(err))); + } + }; + + match msg { + Message::ListProtocols => { + let supported = + this.protocols.iter().map(|(_, p)| p).cloned().collect(); + let message = Message::Protocols(supported); + *this.state = State::SendMessage { + io, + message, + protocol: None, + } + } + Message::Protocol(p) => { + let protocol = this.protocols.iter().find_map(|(name, proto)| { + if &p == proto { + Some(name.clone()) + } else { + None + } + }); + + let message = if protocol.is_some() { + tracing::debug!("Listener: confirming protocol: {}", p); + Message::Protocol(p.clone()) + } else { + tracing::debug!( + "Listener: rejecting protocol: {}", + String::from_utf8_lossy(p.as_ref()) + ); + Message::NotAvailable + }; + + *this.state = State::SendMessage { + io, + message, + protocol, + }; + } + _ => return Poll::Ready(Err(ProtocolError::InvalidMessage.into())), + } + } + + State::SendMessage { + mut io, + message, + protocol, + } => { + match Pin::new(&mut io).poll_ready(cx) { + Poll::Pending => { + *this.state = State::SendMessage { + io, + message, + protocol, + }; + return Poll::Pending; + } + Poll::Ready(Ok(())) => {} + Poll::Ready(Err(err)) => return Poll::Ready(Err(From::from(err))), + } + + if let Message::NotAvailable = &message { + *this.last_sent_na = true; + } else { + *this.last_sent_na = false; + } + + if let Err(err) = Pin::new(&mut io).start_send(message) { + return Poll::Ready(Err(From::from(err))); + } + + *this.state = State::Flush { io, protocol }; + } + + State::Flush { mut io, protocol } => { + match Pin::new(&mut io).poll_flush(cx) { + Poll::Pending => { + *this.state = State::Flush { io, protocol }; + return Poll::Pending; + } + Poll::Ready(Ok(())) => { + // If a protocol has been selected, finish negotiation. + // Otherwise expect to receive another message. + match protocol { + Some(protocol) => { + tracing::debug!( + "Listener: sent confirmed protocol: {}", + String::from_utf8_lossy(protocol.as_ref()) + ); + let io = Negotiated::completed(io.into_inner()); + return Poll::Ready(Ok((protocol, io))); + } + None => *this.state = State::RecvMessage { io }, + } + } + Poll::Ready(Err(err)) => return Poll::Ready(Err(From::from(err))), + } + } + + State::Done => panic!("State::poll called after completion"), + } + } + } +} + +/// Result of [`webrtc_listener_negotiate()`]. +#[derive(Debug)] +pub enum ListenerSelectResult { + /// Requested protocol is available and substream can be accepted. + Accepted { + /// Protocol that is confirmed. + protocol: ProtocolName, + + /// `multistream-select` message. + message: BytesMut, + }, + + /// Requested protocol is not available. + Rejected { + /// `multistream-select` message. + message: BytesMut, + }, +} + +/// Negotiate protocols for listener. +/// +/// Parse protocols offered by the remote peer and check if any of the offered protocols match +/// locally available protocols. If a match is found, return an encoded multistream-select +/// response and the negotiated protocol. If parsing fails or no match is found, return an error. +pub fn webrtc_listener_negotiate( + supported_protocols: Vec, + mut payload: Bytes, +) -> crate::Result { + let protocols = drain_trailing_protocols(payload)?; + let mut protocol_iter = protocols.into_iter(); + + // skip the multistream-select header because it's not part of user protocols but verify it's + // present + if protocol_iter.next() != Some(PROTO_MULTISTREAM_1_0) { + return Err(Error::NegotiationError( + error::NegotiationError::MultistreamSelectError(NegotiationError::Failed), + )); + } + + for protocol in protocol_iter { + tracing::trace!( + target: LOG_TARGET, + protocol = ?std::str::from_utf8(protocol.as_ref()), + "listener: checking protocol", + ); + + for supported in supported_protocols.iter() { + if protocol.as_ref() == supported.as_bytes() { + return Ok(ListenerSelectResult::Accepted { + protocol: supported.clone(), + message: webrtc_encode_multistream_message(std::iter::once( + Message::Protocol(protocol), + ))?, + }); + } + } + } + + tracing::trace!( + target: LOG_TARGET, + "listener: handshake rejected, no supported protocol found", + ); + + Ok(ListenerSelectResult::Rejected { + message: webrtc_encode_multistream_message(std::iter::once(Message::NotAvailable))?, + }) +} + +#[cfg(test)] +mod tests { + use super::*; + use crate::error; + use bytes::BufMut; + + #[test] + fn webrtc_listener_negotiate_works() { + let local_protocols = vec![ + ProtocolName::from("/13371338/proto/1"), + ProtocolName::from("/sup/proto/1"), + ProtocolName::from("/13371338/proto/2"), + ProtocolName::from("/13371338/proto/3"), + ProtocolName::from("/13371338/proto/4"), + ]; + let message = webrtc_encode_multistream_message(vec![ + Message::Protocol(Protocol::try_from(&b"/13371338/proto/1"[..]).unwrap()), + Message::Protocol(Protocol::try_from(&b"/sup/proto/1"[..]).unwrap()), + ]) + .unwrap() + .freeze(); + + match webrtc_listener_negotiate(local_protocols, message) { + Err(error) => panic!("error received: {error:?}"), + Ok(ListenerSelectResult::Rejected { .. }) => panic!("message rejected"), + Ok(ListenerSelectResult::Accepted { protocol, message }) => { + assert_eq!(protocol, ProtocolName::from("/13371338/proto/1")); + } + } + } + + #[test] + fn invalid_message() { + let local_protocols = vec![ + ProtocolName::from("/13371338/proto/1"), + ProtocolName::from("/sup/proto/1"), + ProtocolName::from("/13371338/proto/2"), + ProtocolName::from("/13371338/proto/3"), + ProtocolName::from("/13371338/proto/4"), + ]; + // The invalid message is really two multistream-select messages inside one `WebRtcMessage`: + // 1. the multistream-select header + // 2. an "ls response" message (that does not contain another header) + // + // This is invalid for two reasons: + // 1. It is malformed. Either the header is followed by one or more `Message::Protocol` + // instances or the header is part of the "ls response". + // 2. This sequence of messages is not spec compliant. A listener receives one of the + // following on an inbound substream: + // - a multistream-select header followed by a `Message::Protocol` instance + // - a multistream-select header followed by an "ls" message (<\n>) + // + // `webrtc_listener_negotiate()` should reject this invalid message. The error can either be + // `InvalidData` because the message is malformed or `StateMismatch` because the message is + // not expected at this point in the protocol. + let message = webrtc_encode_multistream_message(std::iter::once(Message::Protocols(vec![ + Protocol::try_from(&b"/13371338/proto/1"[..]).unwrap(), + Protocol::try_from(&b"/sup/proto/1"[..]).unwrap(), + ]))) + .unwrap() + .freeze(); + + match webrtc_listener_negotiate(local_protocols, message) { + Err(error) => assert!(std::matches!( + error, + // something has gone off the rails here... + Error::NegotiationError(error::NegotiationError::ParseError( + error::ParseError::InvalidData + )), + )), + _ => panic!("invalid event"), + } + } + + #[test] + fn only_header_line_received() { + let local_protocols = vec![ + ProtocolName::from("/13371338/proto/1"), + ProtocolName::from("/sup/proto/1"), + ProtocolName::from("/13371338/proto/2"), + ProtocolName::from("/13371338/proto/3"), + ProtocolName::from("/13371338/proto/4"), + ]; + + // send only header line + let mut bytes = BytesMut::with_capacity(32); + let message = Message::Header(HeaderLine::V1); + message.encode(&mut bytes).map_err(|_| Error::InvalidData).unwrap(); + + match webrtc_listener_negotiate(local_protocols, bytes.freeze()) { + Err(error) => assert!(std::matches!( + error, + Error::NegotiationError(error::NegotiationError::ParseError( + error::ParseError::InvalidData + )), + )), + event => panic!("invalid event: {event:?}"), + } + } + + #[test] + fn header_line_missing() { + let local_protocols = vec![ + ProtocolName::from("/13371338/proto/1"), + ProtocolName::from("/sup/proto/1"), + ProtocolName::from("/13371338/proto/2"), + ProtocolName::from("/13371338/proto/3"), + ProtocolName::from("/13371338/proto/4"), + ]; + + // header line missing + let mut bytes = BytesMut::with_capacity(256); + vec![&b"/13371338/proto/1"[..], &b"/sup/proto/1"[..]] + .into_iter() + .for_each(|proto| { + bytes.put_u8((proto.len() + 1) as u8); + + Message::Protocol(Protocol::try_from(proto).unwrap()) + .encode(&mut bytes) + .unwrap(); + }); + + match webrtc_listener_negotiate(local_protocols, bytes.freeze()) { + Err(error) => assert!(std::matches!( + error, + Error::NegotiationError(error::NegotiationError::MultistreamSelectError( + NegotiationError::Failed + )) + )), + event => panic!("invalid event: {event:?}"), + } + } + + #[test] + fn protocol_not_supported() { + let mut local_protocols = vec![ + ProtocolName::from("/13371338/proto/1"), + ProtocolName::from("/sup/proto/1"), + ProtocolName::from("/13371338/proto/2"), + ProtocolName::from("/13371338/proto/3"), + ProtocolName::from("/13371338/proto/4"), + ]; + let message = webrtc_encode_multistream_message(vec![Message::Protocol( + Protocol::try_from(&b"/13371339/proto/1"[..]).unwrap(), + )]) + .unwrap() + .freeze(); + + match webrtc_listener_negotiate(local_protocols, message) { + Err(error) => panic!("error received: {error:?}"), + Ok(ListenerSelectResult::Rejected { message }) => { + assert_eq!( + message, + webrtc_encode_multistream_message(std::iter::once(Message::NotAvailable)) + .unwrap() + ); + } + Ok(ListenerSelectResult::Accepted { protocol, message }) => panic!("message accepted"), + } + } +} diff --git a/client/litep2p/src/multistream_select/mod.rs b/client/litep2p/src/multistream_select/mod.rs new file mode 100644 index 00000000..f195b1f3 --- /dev/null +++ b/client/litep2p/src/multistream_select/mod.rs @@ -0,0 +1,199 @@ +// Copyright 2017 Parity Technologies (UK) Ltd. +// +// Permission is hereby granted, free of charge, to any person obtaining a +// copy of this software and associated documentation files (the "Software"), +// to deal in the Software without restriction, including without limitation +// the rights to use, copy, modify, merge, publish, distribute, sublicense, +// and/or sell copies of the Software, and to permit persons to whom the +// Software is furnished to do so, subject to the following conditions: +// +// The above copyright notice and this permission notice shall be included in +// all copies or substantial portions of the Software. +// +// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS +// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE +// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER +// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING +// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER +// DEALINGS IN THE SOFTWARE. + +#![allow(unused)] +#![allow(clippy::derivable_impls)] + +//! # Multistream-select Protocol Negotiation +//! +//! This crate implements the `multistream-select` protocol, which is the protocol +//! used by libp2p to negotiate which application-layer protocol to use with the +//! remote on a connection or substream. +//! +//! > **Note**: This crate is used primarily by core components of *libp2p* and it +//! > is usually not used directly on its own. +//! +//! ## Roles +//! +//! Two peers using the multistream-select negotiation protocol on an I/O stream +//! are distinguished by their role as a _dialer_ (or _initiator_) or as a _listener_ +//! (or _responder_). Thereby the dialer plays the active part, driving the protocol, +//! whereas the listener reacts to the messages received. +//! +//! The dialer has two options: it can either pick a protocol from the complete list +//! of protocols that the listener supports, or it can directly suggest a protocol. +//! Either way, a selected protocol is sent to the listener who can either accept (by +//! echoing the same protocol) or reject (by responding with a message stating +//! "not available"). If a suggested protocol is not available, the dialer may +//! suggest another protocol. This process continues until a protocol is agreed upon, +//! yielding a [`Negotiated`] stream, or the dialer has run out of +//! alternatives. +//! +//! See [`dialer_select_proto`] and [`listener_select_proto`]. +//! +//! ## [`Negotiated`] +//! +//! A `Negotiated` represents an I/O stream that has settled on a protocol +//! to use. By default, with [`Version::V1`], protocol negotiation is always +//! at least one dedicated round-trip message exchange, before application +//! data for the negotiated protocol can be sent by the dialer. There is +//! a variant [`Version::V1Lazy`] that permits 0-RTT negotiation if the +//! dialer only supports a single protocol. In that case, when a dialer +//! settles on a protocol to use, the [`DialerSelectFuture`] yields a +//! [`Negotiated`] I/O stream before the negotiation +//! data has been flushed. It is then expecting confirmation for that protocol +//! as the first messages read from the stream. This behaviour allows the dialer +//! to immediately send data relating to the negotiated protocol together with the +//! remaining negotiation message(s). Note, however, that a dialer that performs +//! multiple 0-RTT negotiations in sequence for different protocols layered on +//! top of each other may trigger undesirable behaviour for a listener not +//! supporting one of the intermediate protocols. See +//! [`dialer_select_proto`] and the documentation of [`Version::V1Lazy`] for further details. + +#![cfg_attr(docsrs, feature(doc_cfg, doc_auto_cfg))] + +mod dialer_select; +mod length_delimited; +mod listener_select; +mod negotiated; +mod protocol; + +use crate::error::{self, ParseError}; +pub use crate::multistream_select::{ + dialer_select::{dialer_select_proto, DialerSelectFuture, HandshakeResult, WebRtcDialerState}, + listener_select::{ + listener_select_proto, webrtc_listener_negotiate, ListenerSelectFuture, + ListenerSelectResult, + }, + negotiated::{Negotiated, NegotiatedComplete, NegotiationError}, + protocol::{HeaderLine, Message, Protocol, ProtocolError, PROTO_MULTISTREAM_1_0}, +}; + +use bytes::Bytes; + +const LOG_TARGET: &str = "litep2p::multistream-select"; + +/// Supported multistream-select versions. +#[derive(Clone, Copy, Debug, PartialEq, Eq)] +pub enum Version { + /// Version 1 of the multistream-select protocol. See [1] and [2]. + /// + /// [1]: https://github.com/libp2p/specs/blob/master/connections/README.md#protocol-negotiation + /// [2]: https://github.com/multiformats/multistream-select + V1, + /// A "lazy" variant of version 1 that is identical on the wire but whereby + /// the dialer delays flushing protocol negotiation data in order to combine + /// it with initial application data, thus performing 0-RTT negotiation. + /// + /// This strategy is only applicable for the node with the role of "dialer" + /// in the negotiation and only if the dialer supports just a single + /// application protocol. In that case the dialer immedidately "settles" + /// on that protocol, buffering the negotiation messages to be sent + /// with the first round of application protocol data (or an attempt + /// is made to read from the `Negotiated` I/O stream). + /// + /// A listener will behave identically to `V1`. This ensures interoperability with `V1`. + /// Notably, it will immediately send the multistream header as well as the protocol + /// confirmation, resulting in multiple frames being sent on the underlying transport. + /// Nevertheless, if the listener supports the protocol that the dialer optimistically + /// settled on, it can be a 0-RTT negotiation. + /// + /// > **Note**: `V1Lazy` is specific to `rust-libp2p`. The wire protocol is identical to `V1` + /// > and generally interoperable with peers only supporting `V1`. Nevertheless, there is a + /// > pitfall that is rarely encountered: When nesting multiple protocol negotiations, the + /// > listener should either be known to support all of the dialer's optimistically chosen + /// > protocols or there is must be no intermediate protocol without a payload and none of + /// > the protocol payloads must have the potential for being mistaken for a multistream-select + /// > protocol message. This avoids rare edge-cases whereby the listener may not recognize + /// > upgrade boundaries and erroneously process a request despite not supporting one of + /// > the intermediate protocols that the dialer committed to. See [1] and [2]. + /// + /// [1]: https://github.com/multiformats/go-multistream/issues/20 + /// [2]: https://github.com/libp2p/rust-libp2p/pull/1212 + V1Lazy, + // Draft: https://github.com/libp2p/specs/pull/95 + // V2, +} + +impl Default for Version { + fn default() -> Self { + Version::V1 + } +} + +// This function is only used in the WebRTC transport. It expects one or more multistream-select +// messages in `remaining` and returns a list of protocols that were decoded from them. +fn drain_trailing_protocols( + mut remaining: Bytes, +) -> Result, error::NegotiationError> { + let mut protocols = vec![]; + + loop { + if remaining.is_empty() { + break; + } + + let (len, tail) = unsigned_varint::decode::usize(&remaining).map_err(|error| { + tracing::debug!( + target: LOG_TARGET, + ?error, + message = ?remaining, + "Failed to decode length-prefix in multistream message"); + error::NegotiationError::ParseError(ParseError::InvalidData) + })?; + + if len > tail.len() { + tracing::debug!( + target: LOG_TARGET, + message = ?tail, + length_prefix = len, + actual_length = tail.len(), + "Truncated multistream message", + ); + + return Err(error::NegotiationError::ParseError(ParseError::InvalidData)); + } + + let len_size = remaining.len() - tail.len(); + let payload = remaining.slice(len_size..len_size + len); + let res = Message::decode(payload); + + match res { + Ok(Message::Header(HeaderLine::V1)) => protocols.push(PROTO_MULTISTREAM_1_0), + Ok(Message::Protocol(protocol)) => protocols.push(protocol), + Ok(Message::Protocols(_)) => + return Err(error::NegotiationError::ParseError(ParseError::InvalidData)), + Err(error) => { + tracing::debug!( + target: LOG_TARGET, + ?error, + message = ?tail[..len], + "Failed to decode multistream message", + ); + return Err(error::NegotiationError::ParseError(ParseError::InvalidData)); + } + _ => return Err(error::NegotiationError::StateMismatch), + } + + remaining = remaining.slice(len_size + len..); + } + + Ok(protocols) +} diff --git a/client/litep2p/src/multistream_select/negotiated.rs b/client/litep2p/src/multistream_select/negotiated.rs new file mode 100644 index 00000000..e4609de2 --- /dev/null +++ b/client/litep2p/src/multistream_select/negotiated.rs @@ -0,0 +1,375 @@ +// Copyright 2019 Parity Technologies (UK) Ltd. +// +// Permission is hereby granted, free of charge, to any person obtaining a +// copy of this software and associated documentation files (the "Software"), +// to deal in the Software without restriction, including without limitation +// the rights to use, copy, modify, merge, publish, distribute, sublicense, +// and/or sell copies of the Software, and to permit persons to whom the +// Software is furnished to do so, subject to the following conditions: +// +// The above copyright notice and this permission notice shall be included in +// all copies or substantial portions of the Software. +// +// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS +// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE +// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER +// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING +// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER +// DEALINGS IN THE SOFTWARE. + +use crate::multistream_select::protocol::{ + HeaderLine, Message, MessageReader, Protocol, ProtocolError, +}; + +use futures::{ + io::{IoSlice, IoSliceMut}, + prelude::*, + ready, +}; +use pin_project::pin_project; +use std::{ + error::Error, + fmt, io, mem, + pin::Pin, + task::{Context, Poll}, +}; + +const LOG_TARGET: &str = "litep2p::multistream-select"; + +/// An I/O stream that has settled on an (application-layer) protocol to use. +/// +/// A `Negotiated` represents an I/O stream that has _settled_ on a protocol +/// to use. In particular, it is not implied that all of the protocol negotiation +/// frames have yet been sent and / or received, just that the selected protocol +/// is fully determined. This is to allow the last protocol negotiation frames +/// sent by a peer to be combined in a single write, possibly piggy-backing +/// data from the negotiated protocol on top. +/// +/// Reading from a `Negotiated` I/O stream that still has pending negotiation +/// protocol data to send implicitly triggers flushing of all yet unsent data. +#[pin_project] +#[derive(Debug)] +pub struct Negotiated { + #[pin] + state: State, +} + +/// A `Future` that waits on the completion of protocol negotiation. +#[derive(Debug)] +pub struct NegotiatedComplete { + inner: Option>, +} + +impl Future for NegotiatedComplete +where + // `Unpin` is required not because of + // implementation details but because we produce + // the `Negotiated` as the output of the + // future. + TInner: AsyncRead + AsyncWrite + Unpin, +{ + type Output = Result, NegotiationError>; + + fn poll(mut self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll { + let mut io = self.inner.take().expect("NegotiatedFuture called after completion."); + match Negotiated::poll(Pin::new(&mut io), cx) { + Poll::Pending => { + self.inner = Some(io); + Poll::Pending + } + Poll::Ready(Ok(())) => Poll::Ready(Ok(io)), + Poll::Ready(Err(err)) => { + self.inner = Some(io); + Poll::Ready(Err(err)) + } + } + } +} + +impl Negotiated { + /// Creates a `Negotiated` in state [`State::Completed`]. + pub(crate) fn completed(io: TInner) -> Self { + Negotiated { + state: State::Completed { io }, + } + } + + /// Creates a `Negotiated` in state [`State::Expecting`] that is still + /// expecting confirmation of the given `protocol`. + pub(crate) fn expecting( + io: MessageReader, + protocol: Protocol, + header: Option, + ) -> Self { + Negotiated { + state: State::Expecting { + io, + protocol, + header, + }, + } + } + + pub fn inner(self) -> TInner { + match self.state { + State::Completed { io } => io, + _ => panic!("stream is not negotiated"), + } + } + + /// Polls the `Negotiated` for completion. + fn poll(mut self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll> + where + TInner: AsyncRead + AsyncWrite + Unpin, + { + // Flush any pending negotiation data. + match self.as_mut().poll_flush(cx) { + Poll::Ready(Ok(())) => {} + Poll::Pending => return Poll::Pending, + Poll::Ready(Err(e)) => { + // If the remote closed the stream, it is important to still + // continue reading the data that was sent, if any. + if e.kind() != io::ErrorKind::WriteZero { + return Poll::Ready(Err(e.into())); + } + } + } + + let mut this = self.project(); + + if let StateProj::Completed { .. } = this.state.as_mut().project() { + return Poll::Ready(Ok(())); + } + + // Read outstanding protocol negotiation messages. + loop { + match mem::replace(&mut *this.state, State::Invalid) { + State::Expecting { + mut io, + header, + protocol, + } => { + let msg = match Pin::new(&mut io).poll_next(cx)? { + Poll::Ready(Some(msg)) => msg, + Poll::Pending => { + *this.state = State::Expecting { + io, + header, + protocol, + }; + return Poll::Pending; + } + Poll::Ready(None) => { + return Poll::Ready(Err(ProtocolError::IoError( + io::ErrorKind::UnexpectedEof.into(), + ) + .into())); + } + }; + + if let Message::Header(h) = &msg { + if Some(h) == header.as_ref() { + *this.state = State::Expecting { + io, + protocol, + header: None, + }; + continue; + } else { + // If we received a header message but it doesn't match the expected + // one, or we have already received the message return an error. + return Poll::Ready(Err(ProtocolError::InvalidMessage.into())); + } + } + + if let Message::Protocol(p) = &msg { + if p.as_ref() == protocol.as_ref() { + tracing::debug!( + target: LOG_TARGET, + "Negotiated: Received confirmation for protocol: {}", + p + ); + *this.state = State::Completed { + io: io.into_inner(), + }; + return Poll::Ready(Ok(())); + } + } + + return Poll::Ready(Err(NegotiationError::Failed)); + } + + _ => panic!("Negotiated: Invalid state"), + } + } + } + + /// Returns a [`NegotiatedComplete`] future that waits for protocol + /// negotiation to complete. + pub fn complete(self) -> NegotiatedComplete { + NegotiatedComplete { inner: Some(self) } + } +} + +/// The states of a `Negotiated` I/O stream. +#[pin_project(project = StateProj)] +#[derive(Debug)] +enum State { + /// In this state, a `Negotiated` is still expecting to + /// receive confirmation of the protocol it has optimistically + /// settled on. + Expecting { + /// The underlying I/O stream. + #[pin] + io: MessageReader, + /// The expected negotiation header/preamble (i.e. multistream-select version), + /// if one is still expected to be received. + header: Option, + /// The expected application protocol (i.e. name and version). + protocol: Protocol, + }, + + /// In this state, a protocol has been agreed upon and I/O + /// on the underlying stream can commence. + Completed { + #[pin] + io: R, + }, + + /// Temporary state while moving the `io` resource from + /// `Expecting` to `Completed`. + Invalid, +} + +impl AsyncRead for Negotiated +where + TInner: AsyncRead + AsyncWrite + Unpin, +{ + fn poll_read( + mut self: Pin<&mut Self>, + cx: &mut Context<'_>, + buf: &mut [u8], + ) -> Poll> { + loop { + if let StateProj::Completed { io } = self.as_mut().project().state.project() { + // If protocol negotiation is complete, commence with reading. + return io.poll_read(cx, buf); + } + + // Poll the `Negotiated`, driving protocol negotiation to completion, + // including flushing of any remaining data. + match self.as_mut().poll(cx) { + Poll::Ready(Ok(())) => {} + Poll::Pending => return Poll::Pending, + Poll::Ready(Err(err)) => return Poll::Ready(Err(From::from(err))), + } + } + } + + fn poll_read_vectored( + mut self: Pin<&mut Self>, + cx: &mut Context<'_>, + bufs: &mut [IoSliceMut<'_>], + ) -> Poll> { + loop { + if let StateProj::Completed { io } = self.as_mut().project().state.project() { + // If protocol negotiation is complete, commence with reading. + return io.poll_read_vectored(cx, bufs); + } + + // Poll the `Negotiated`, driving protocol negotiation to completion, + // including flushing of any remaining data. + match self.as_mut().poll(cx) { + Poll::Ready(Ok(())) => {} + Poll::Pending => return Poll::Pending, + Poll::Ready(Err(err)) => return Poll::Ready(Err(From::from(err))), + } + } + } +} + +impl AsyncWrite for Negotiated +where + TInner: AsyncWrite + AsyncRead + Unpin, +{ + fn poll_write( + self: Pin<&mut Self>, + cx: &mut Context<'_>, + buf: &[u8], + ) -> Poll> { + match self.project().state.project() { + StateProj::Completed { io } => io.poll_write(cx, buf), + StateProj::Expecting { io, .. } => io.poll_write(cx, buf), + StateProj::Invalid => panic!("Negotiated: Invalid state"), + } + } + + fn poll_flush(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll> { + match self.project().state.project() { + StateProj::Completed { io } => io.poll_flush(cx), + StateProj::Expecting { io, .. } => io.poll_flush(cx), + StateProj::Invalid => panic!("Negotiated: Invalid state"), + } + } + + fn poll_close(mut self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll> { + // Ensure all data has been flushed, including optimistic multistream-select messages. + ready!(self.as_mut().poll_flush(cx).map_err(Into::::into)?); + + // Continue with the shutdown of the underlying I/O stream. + match self.project().state.project() { + StateProj::Completed { io, .. } => io.poll_close(cx), + StateProj::Expecting { io, .. } => { + let close_poll = io.poll_close(cx); + if let Poll::Ready(Ok(())) = close_poll { + tracing::debug!( + target: LOG_TARGET, + "Stream closed. Confirmation from remote for optimstic protocol negotiation still pending." + ); + } + close_poll + } + StateProj::Invalid => panic!("Negotiated: Invalid state"), + } + } + + fn poll_write_vectored( + self: Pin<&mut Self>, + cx: &mut Context<'_>, + bufs: &[IoSlice<'_>], + ) -> Poll> { + match self.project().state.project() { + StateProj::Completed { io } => io.poll_write_vectored(cx, bufs), + StateProj::Expecting { io, .. } => io.poll_write_vectored(cx, bufs), + StateProj::Invalid => panic!("Negotiated: Invalid state"), + } + } +} + +/// Error that can happen when negotiating a protocol with the remote. +#[derive(Debug, thiserror::Error, PartialEq)] +pub enum NegotiationError { + /// A protocol error occurred during the negotiation. + #[error("A protocol error occurred during the negotiation: `{0:?}`")] + ProtocolError(#[from] ProtocolError), + + /// Protocol negotiation failed because no protocol could be agreed upon. + #[error("Protocol negotiation failed.")] + Failed, +} + +impl From for NegotiationError { + fn from(err: io::Error) -> NegotiationError { + ProtocolError::from(err).into() + } +} + +impl From for io::Error { + fn from(err: NegotiationError) -> io::Error { + if let NegotiationError::ProtocolError(e) = err { + return e.into(); + } + io::Error::other(err) + } +} diff --git a/client/litep2p/src/multistream_select/protocol.rs b/client/litep2p/src/multistream_select/protocol.rs new file mode 100644 index 00000000..71775df9 --- /dev/null +++ b/client/litep2p/src/multistream_select/protocol.rs @@ -0,0 +1,544 @@ +// Copyright 2017 Parity Technologies (UK) Ltd. +// +// Permission is hereby granted, free of charge, to any person obtaining a +// copy of this software and associated documentation files (the "Software"), +// to deal in the Software without restriction, including without limitation +// the rights to use, copy, modify, merge, publish, distribute, sublicense, +// and/or sell copies of the Software, and to permit persons to whom the +// Software is furnished to do so, subject to the following conditions: +// +// The above copyright notice and this permission notice shall be included in +// all copies or substantial portions of the Software. +// +// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS +// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE +// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER +// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING +// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER +// DEALINGS IN THE SOFTWARE. + +//! Multistream-select protocol messages an I/O operations for +//! constructing protocol negotiation flows. +//! +//! A protocol negotiation flow is constructed by using the +//! `Stream` and `Sink` implementations of `MessageIO` and +//! `MessageReader`. + +use crate::{ + codec::unsigned_varint::UnsignedVarint, + error::Error as Litep2pError, + multistream_select::{ + length_delimited::{LengthDelimited, LengthDelimitedReader}, + Version, + }, +}; + +use bytes::{BufMut, Bytes, BytesMut}; +use futures::{io::IoSlice, prelude::*, ready}; +use std::{ + convert::TryFrom, + error::Error, + fmt, io, + pin::Pin, + task::{Context, Poll}, +}; +use unsigned_varint as uvi; + +/// The maximum number of supported protocols that can be processed. +const MAX_PROTOCOLS: usize = 1000; + +/// The encoded form of a multistream-select 1.0.0 header message. +pub const MSG_MULTISTREAM_1_0: &[u8] = b"/multistream/1.0.0\n"; +/// The encoded form of a multistream-select 'na' message. +const MSG_PROTOCOL_NA: &[u8] = b"na\n"; +/// The encoded form of a multistream-select 'ls' message. +const MSG_LS: &[u8] = b"ls\n"; +/// A Protocol instance for the `/multistream/1.0.0` header line. +pub const PROTO_MULTISTREAM_1_0: Protocol = Protocol(Bytes::from_static(b"/multistream/1.0.0")); +/// Logging target. +const LOG_TARGET: &str = "litep2p::multistream-select"; + +/// The multistream-select header lines preceeding negotiation. +/// +/// Every [`Version`] has a corresponding header line. +#[derive(Copy, Clone, Debug, PartialEq, Eq)] +pub enum HeaderLine { + /// The `/multistream/1.0.0` header line. + V1, +} + +impl From for HeaderLine { + fn from(v: Version) -> HeaderLine { + match v { + Version::V1 | Version::V1Lazy => HeaderLine::V1, + } + } +} + +/// A protocol (name) exchanged during protocol negotiation. +#[derive(Clone, Debug, PartialEq, Eq)] +pub struct Protocol(Bytes); + +impl AsRef<[u8]> for Protocol { + fn as_ref(&self) -> &[u8] { + self.0.as_ref() + } +} + +impl TryFrom for Protocol { + type Error = ProtocolError; + + fn try_from(value: Bytes) -> Result { + if !value.as_ref().starts_with(b"/") { + return Err(ProtocolError::InvalidProtocol); + } + Ok(Protocol(value)) + } +} + +impl TryFrom<&[u8]> for Protocol { + type Error = ProtocolError; + + fn try_from(value: &[u8]) -> Result { + Self::try_from(Bytes::copy_from_slice(value)) + } +} + +impl fmt::Display for Protocol { + fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { + write!(f, "{}", String::from_utf8_lossy(&self.0)) + } +} + +/// A multistream-select protocol message. +/// +/// Multistream-select protocol messages are exchanged with the goal +/// of agreeing on a application-layer protocol to use on an I/O stream. +#[derive(Debug, Clone, PartialEq, Eq)] +pub enum Message { + /// A header message identifies the multistream-select protocol + /// that the sender wishes to speak. + Header(HeaderLine), + /// A protocol message identifies a protocol request or acknowledgement. + Protocol(Protocol), + /// A message through which a peer requests the complete list of + /// supported protocols from the remote. + ListProtocols, + /// A message listing all supported protocols of a peer. + Protocols(Vec), + /// A message signaling that a requested protocol is not available. + NotAvailable, +} + +impl Message { + /// Encodes a `Message` into its byte representation. + pub fn encode(&self, dest: &mut BytesMut) -> Result<(), ProtocolError> { + match self { + Message::Header(HeaderLine::V1) => { + dest.reserve(MSG_MULTISTREAM_1_0.len()); + dest.put(MSG_MULTISTREAM_1_0); + Ok(()) + } + Message::Protocol(p) => { + let len = p.0.as_ref().len() + 1; // + 1 for \n + dest.reserve(len); + dest.put(p.0.as_ref()); + dest.put_u8(b'\n'); + Ok(()) + } + Message::ListProtocols => { + dest.reserve(MSG_LS.len()); + dest.put(MSG_LS); + Ok(()) + } + Message::Protocols(ps) => { + let mut buf = uvi::encode::usize_buffer(); + let mut encoded = Vec::with_capacity(ps.len()); + for p in ps { + encoded.extend(uvi::encode::usize(p.0.as_ref().len() + 1, &mut buf)); // +1 for '\n' + encoded.extend_from_slice(p.0.as_ref()); + encoded.push(b'\n') + } + encoded.push(b'\n'); + dest.reserve(encoded.len()); + dest.put(encoded.as_ref()); + Ok(()) + } + Message::NotAvailable => { + dest.reserve(MSG_PROTOCOL_NA.len()); + dest.put(MSG_PROTOCOL_NA); + Ok(()) + } + } + } + + /// Decodes a `Message` from its byte representation. + pub fn decode(mut msg: Bytes) -> Result { + if msg == MSG_MULTISTREAM_1_0 { + return Ok(Message::Header(HeaderLine::V1)); + } + + if msg == MSG_PROTOCOL_NA { + return Ok(Message::NotAvailable); + } + + if msg == MSG_LS { + return Ok(Message::ListProtocols); + } + + // If it starts with a `/`, ends with a line feed without any + // other line feeds in-between, it must be a protocol name. + if msg.first() == Some(&b'/') + && msg.last() == Some(&b'\n') + && !msg[..msg.len() - 1].contains(&b'\n') + { + let p = Protocol::try_from(msg.split_to(msg.len() - 1))?; + return Ok(Message::Protocol(p)); + } + + // At this point, it must be an `ls` response, i.e. one or more + // length-prefixed, newline-delimited protocol names. + let mut protocols = Vec::new(); + let mut remaining: &[u8] = &msg; + loop { + // A well-formed message must be terminated with a newline. + if remaining == [b'\n'] { + break; + } else if protocols.len() == MAX_PROTOCOLS { + return Err(ProtocolError::TooManyProtocols); + } + + // Decode the length of the next protocol name and check that + // it ends with a line feed. + let (len, tail) = uvi::decode::usize(remaining)?; + if len == 0 || len > tail.len() || tail[len - 1] != b'\n' { + return Err(ProtocolError::InvalidMessage); + } + + // Parse the protocol name. + let p = Protocol::try_from(Bytes::copy_from_slice(&tail[..len - 1]))?; + protocols.push(p); + + // Skip ahead to the next protocol. + remaining = &tail[len..]; + } + + Ok(Message::Protocols(protocols)) + } +} + +/// Create `multistream-select` message from an iterator of `Message`s. +/// +/// # Note +/// +/// This implementation may not be compliant with the multistream-select protocol spec. +/// The only purpose of this was to get the `multistream-select` protocol working with smoldot. +pub fn webrtc_encode_multistream_message( + messages: impl IntoIterator, +) -> crate::Result { + // encode `/multistream-select/1.0.0` header + let mut bytes = BytesMut::with_capacity(32); + let message = Message::Header(HeaderLine::V1); + message.encode(&mut bytes).map_err(|_| Litep2pError::InvalidData)?; + let mut header = UnsignedVarint::encode(bytes)?; + + // encode each message + for message in messages { + let mut proto_bytes = BytesMut::with_capacity(256); + message.encode(&mut proto_bytes).map_err(|_| Litep2pError::InvalidData)?; + let mut proto_bytes = UnsignedVarint::encode(proto_bytes)?; + header.append(&mut proto_bytes); + } + + Ok(BytesMut::from(&header[..])) +} + +/// A `MessageIO` implements a [`Stream`] and [`Sink`] of [`Message`]s. +#[pin_project::pin_project] +pub struct MessageIO { + #[pin] + inner: LengthDelimited, +} + +impl MessageIO { + /// Constructs a new `MessageIO` resource wrapping the given I/O stream. + pub fn new(inner: R) -> MessageIO + where + R: AsyncRead + AsyncWrite, + { + Self { + inner: LengthDelimited::new(inner), + } + } + + /// Converts the [`MessageIO`] into a [`MessageReader`], dropping the + /// [`Message`]-oriented `Sink` in favour of direct `AsyncWrite` access + /// to the underlying I/O stream. + /// + /// This is typically done if further negotiation messages are expected to be + /// received but no more messages are written, allowing the writing of + /// follow-up protocol data to commence. + pub fn into_reader(self) -> MessageReader { + MessageReader { + inner: self.inner.into_reader(), + } + } + + /// Drops the [`MessageIO`] resource, yielding the underlying I/O stream. + /// + /// # Panics + /// + /// Panics if the read buffer or write buffer is not empty, meaning that an incoming + /// protocol negotiation frame has been partially read or an outgoing frame + /// has not yet been flushed. The read buffer is guaranteed to be empty whenever + /// `MessageIO::poll` returned a message. The write buffer is guaranteed to be empty + /// when the sink has been flushed. + pub fn into_inner(self) -> R { + self.inner.into_inner() + } +} + +impl Sink for MessageIO +where + R: AsyncWrite, +{ + type Error = ProtocolError; + + fn poll_ready(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll> { + self.project().inner.poll_ready(cx).map_err(From::from) + } + + fn start_send(self: Pin<&mut Self>, item: Message) -> Result<(), Self::Error> { + let mut buf = BytesMut::new(); + item.encode(&mut buf)?; + self.project().inner.start_send(buf.freeze()).map_err(From::from) + } + + fn poll_flush(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll> { + self.project().inner.poll_flush(cx).map_err(From::from) + } + + fn poll_close(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll> { + self.project().inner.poll_close(cx).map_err(From::from) + } +} + +impl Stream for MessageIO +where + R: AsyncRead, +{ + type Item = Result; + + fn poll_next(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll> { + match poll_stream(self.project().inner, cx) { + Poll::Pending => Poll::Pending, + Poll::Ready(None) => Poll::Ready(None), + Poll::Ready(Some(Ok(m))) => Poll::Ready(Some(Ok(m))), + Poll::Ready(Some(Err(err))) => Poll::Ready(Some(Err(err))), + } + } +} + +/// A `MessageReader` implements a `Stream` of `Message`s on an underlying +/// I/O resource combined with direct `AsyncWrite` access. +#[pin_project::pin_project] +#[derive(Debug)] +pub struct MessageReader { + #[pin] + inner: LengthDelimitedReader, +} + +impl MessageReader { + /// Drops the `MessageReader` resource, yielding the underlying I/O stream + /// together with the remaining write buffer containing the protocol + /// negotiation frame data that has not yet been written to the I/O stream. + /// + /// # Panics + /// + /// Panics if the read buffer or write buffer is not empty, meaning that either + /// an incoming protocol negotiation frame has been partially read, or an + /// outgoing frame has not yet been flushed. The read buffer is guaranteed to + /// be empty whenever `MessageReader::poll` returned a message. The write + /// buffer is guaranteed to be empty whenever the sink has been flushed. + pub fn into_inner(self) -> R { + self.inner.into_inner() + } +} + +impl Stream for MessageReader +where + R: AsyncRead, +{ + type Item = Result; + + fn poll_next(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll> { + poll_stream(self.project().inner, cx) + } +} + +impl AsyncWrite for MessageReader +where + TInner: AsyncWrite, +{ + fn poll_write( + self: Pin<&mut Self>, + cx: &mut Context<'_>, + buf: &[u8], + ) -> Poll> { + self.project().inner.poll_write(cx, buf) + } + + fn poll_flush(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll> { + self.project().inner.poll_flush(cx) + } + + fn poll_close(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll> { + self.project().inner.poll_close(cx) + } + + fn poll_write_vectored( + self: Pin<&mut Self>, + cx: &mut Context<'_>, + bufs: &[IoSlice<'_>], + ) -> Poll> { + self.project().inner.poll_write_vectored(cx, bufs) + } +} + +fn poll_stream( + stream: Pin<&mut S>, + cx: &mut Context<'_>, +) -> Poll>> +where + S: Stream>, +{ + let msg = if let Some(msg) = ready!(stream.poll_next(cx)?) { + match Message::decode(msg) { + Ok(m) => m, + Err(err) => return Poll::Ready(Some(Err(err))), + } + } else { + return Poll::Ready(None); + }; + + tracing::trace!(target: LOG_TARGET, "Received message: {:?}", msg); + + Poll::Ready(Some(Ok(msg))) +} + +/// A protocol error. +#[derive(Debug, thiserror::Error)] +pub enum ProtocolError { + /// I/O error. + #[error("I/O error: `{0}`")] + IoError(#[from] io::Error), + + /// Received an invalid message from the remote. + #[error("Received an invalid message from the remote.")] + InvalidMessage, + + /// A protocol (name) is invalid. + #[error("A protocol (name) is invalid.")] + InvalidProtocol, + + /// Too many protocols have been returned by the remote. + #[error("Too many protocols have been returned by the remote.")] + TooManyProtocols, + + /// The protocol is not supported. + #[error("The protocol is not supported.")] + ProtocolNotSupported, +} + +impl PartialEq for ProtocolError { + fn eq(&self, other: &Self) -> bool { + match (self, other) { + (ProtocolError::IoError(lhs), ProtocolError::IoError(rhs)) => lhs.kind() == rhs.kind(), + _ => std::mem::discriminant(self) == std::mem::discriminant(other), + } + } +} + +impl From for io::Error { + fn from(err: ProtocolError) -> Self { + if let ProtocolError::IoError(e) = err { + return e; + } + io::ErrorKind::InvalidData.into() + } +} + +impl From for ProtocolError { + fn from(err: uvi::decode::Error) -> ProtocolError { + Self::from(io::Error::new(io::ErrorKind::InvalidData, err.to_string())) + } +} + +#[cfg(test)] +mod tests { + use super::*; + + #[test] + fn test_decode_main_messages() { + // Decode main messages. + let bytes = Bytes::from_static(MSG_MULTISTREAM_1_0); + assert_eq!( + Message::decode(bytes).unwrap(), + Message::Header(HeaderLine::V1) + ); + + let bytes = Bytes::from_static(MSG_PROTOCOL_NA); + assert_eq!(Message::decode(bytes).unwrap(), Message::NotAvailable); + + let bytes = Bytes::from_static(MSG_LS); + assert_eq!(Message::decode(bytes).unwrap(), Message::ListProtocols); + } + + #[test] + fn test_decode_empty_message() { + // Empty message should decode to an IoError, not Header::Protocols. + let bytes = Bytes::from_static(b""); + match Message::decode(bytes).unwrap_err() { + ProtocolError::IoError(io) => assert_eq!(io.kind(), io::ErrorKind::InvalidData), + err => panic!("Unexpected error: {:?}", err), + }; + } + + #[test] + fn test_decode_protocols() { + // Single protocol. + let bytes = Bytes::from_static(b"/protocol-v1\n"); + assert_eq!( + Message::decode(bytes).unwrap(), + Message::Protocol(Protocol::try_from(Bytes::from_static(b"/protocol-v1")).unwrap()) + ); + + // Multiple protocols. + let expected = Message::Protocols(vec![ + Protocol::try_from(Bytes::from_static(b"/protocol-v1")).unwrap(), + Protocol::try_from(Bytes::from_static(b"/protocol-v2")).unwrap(), + ]); + let mut encoded = BytesMut::new(); + expected.encode(&mut encoded).unwrap(); + + // `\r` is the length of the protocol names. + let bytes = Bytes::from_static(b"\r/protocol-v1\n\r/protocol-v2\n\n"); + assert_eq!(encoded, bytes); + + assert_eq!( + Message::decode(bytes).unwrap(), + Message::Protocols(vec![ + Protocol::try_from(Bytes::from_static(b"/protocol-v1")).unwrap(), + Protocol::try_from(Bytes::from_static(b"/protocol-v2")).unwrap(), + ]) + ); + + // Check invalid length. + let bytes = Bytes::from_static(b"\r/v1\n\n"); + assert_eq!( + Message::decode(bytes).unwrap_err(), + ProtocolError::InvalidMessage + ); + } +} diff --git a/client/litep2p/src/multistream_select/tests/dialer_select.rs b/client/litep2p/src/multistream_select/tests/dialer_select.rs new file mode 100644 index 00000000..378c8c15 --- /dev/null +++ b/client/litep2p/src/multistream_select/tests/dialer_select.rs @@ -0,0 +1,178 @@ +// Copyright 2017 Parity Technologies (UK) Ltd. +// +// Permission is hereby granted, free of charge, to any person obtaining a +// copy of this software and associated documentation files (the "Software"), +// to deal in the Software without restriction, including without limitation +// the rights to use, copy, modify, merge, publish, distribute, sublicense, +// and/or sell copies of the Software, and to permit persons to whom the +// Software is furnished to do so, subject to the following conditions: +// +// The above copyright notice and this permission notice shall be included in +// all copies or substantial portions of the Software. +// +// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS +// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE +// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER +// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING +// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER +// DEALINGS IN THE SOFTWARE. + +//! Integration tests for protocol negotiation. + +use async_std::net::{TcpListener, TcpStream}; +use futures::prelude::*; +use multistream_select::{dialer_select_proto, listener_select_proto, NegotiationError, Version}; + +#[test] +fn select_proto_basic() { + async fn run(version: Version) { + let listener = TcpListener::bind("127.0.0.1:0").await.unwrap(); + let listener_addr = listener.local_addr().unwrap(); + + let server = async_std::task::spawn(async move { + let connec = listener.accept().await.unwrap().0; + let protos = vec![b"/proto1", b"/proto2"]; + let (proto, mut io) = listener_select_proto(connec, protos).await.unwrap(); + assert_eq!(proto, b"/proto2"); + + let mut out = vec![0; 32]; + let n = io.read(&mut out).await.unwrap(); + out.truncate(n); + assert_eq!(out, b"ping"); + + io.write_all(b"pong").await.unwrap(); + io.flush().await.unwrap(); + }); + + let client = async_std::task::spawn(async move { + let connec = TcpStream::connect(&listener_addr).await.unwrap(); + let protos = vec![b"/proto3", b"/proto2"]; + let (proto, mut io) = dialer_select_proto(connec, protos.into_iter(), version) + .await + .unwrap(); + assert_eq!(proto, b"/proto2"); + + io.write_all(b"ping").await.unwrap(); + io.flush().await.unwrap(); + + let mut out = vec![0; 32]; + let n = io.read(&mut out).await.unwrap(); + out.truncate(n); + assert_eq!(out, b"pong"); + }); + + server.await; + client.await; + } + + async_std::task::block_on(run(Version::V1)); + async_std::task::block_on(run(Version::V1Lazy)); +} + +/// Tests the expected behaviour of failed negotiations. +#[test] +fn negotiation_failed() { + let _ = env_logger::try_init(); + + async fn run( + Test { + version, + listen_protos, + dial_protos, + dial_payload, + }: Test, + ) { + let listener = TcpListener::bind("127.0.0.1:0").await.unwrap(); + let listener_addr = listener.local_addr().unwrap(); + + let server = async_std::task::spawn(async move { + let connec = listener.accept().await.unwrap().0; + let io = match listener_select_proto(connec, listen_protos).await { + Ok((_, io)) => io, + Err(NegotiationError::Failed) => return, + Err(NegotiationError::ProtocolError(e)) => { + panic!("Unexpected protocol error {e}") + } + }; + match io.complete().await { + Err(NegotiationError::Failed) => {} + _ => panic!(), + } + }); + + let client = async_std::task::spawn(async move { + let connec = TcpStream::connect(&listener_addr).await.unwrap(); + let mut io = match dialer_select_proto(connec, dial_protos.into_iter(), version).await { + Err(NegotiationError::Failed) => return, + Ok((_, io)) => io, + Err(_) => panic!(), + }; + // The dialer may write a payload that is even sent before it + // got confirmation of the last proposed protocol, when `V1Lazy` + // is used. + io.write_all(&dial_payload).await.unwrap(); + match io.complete().await { + Err(NegotiationError::Failed) => {} + _ => panic!(), + } + }); + + server.await; + client.await; + } + + /// Parameters for a single test run. + #[derive(Clone)] + struct Test { + version: Version, + listen_protos: Vec<&'static str>, + dial_protos: Vec<&'static str>, + dial_payload: Vec, + } + + // Disjunct combinations of listen and dial protocols to test. + // + // The choices here cover the main distinction between a single + // and multiple protocols. + let protos = vec![ + (vec!["/proto1"], vec!["/proto2"]), + (vec!["/proto1", "/proto2"], vec!["/proto3", "/proto4"]), + ]; + + // The payloads that the dialer sends after "successful" negotiation, + // which may be sent even before the dialer got protocol confirmation + // when `V1Lazy` is used. + // + // The choices here cover the specific situations that can arise with + // `V1Lazy` and which must nevertheless behave identically to `V1` w.r.t. + // the outcome of the negotiation. + let payloads = vec![ + // No payload, in which case all versions should behave identically + // in any case, i.e. the baseline test. + vec![], + // With this payload and `V1Lazy`, the listener interprets the first + // `1` as a message length and encounters an invalid message (the + // second `1`). The listener is nevertheless expected to fail + // negotiation normally, just like with `V1`. + vec![1, 1], + // With this payload and `V1Lazy`, the listener interprets the first + // `42` as a message length and encounters unexpected EOF trying to + // read a message of that length. The listener is nevertheless expected + // to fail negotiation normally, just like with `V1` + vec![42, 1], + ]; + + for (listen_protos, dial_protos) in protos { + for dial_payload in payloads.clone() { + for &version in &[Version::V1, Version::V1Lazy] { + async_std::task::block_on(run(Test { + version, + listen_protos: listen_protos.clone(), + dial_protos: dial_protos.clone(), + dial_payload: dial_payload.clone(), + })) + } + } + } +} diff --git a/client/litep2p/src/multistream_select/tests/transport.rs b/client/litep2p/src/multistream_select/tests/transport.rs new file mode 100644 index 00000000..e4517e27 --- /dev/null +++ b/client/litep2p/src/multistream_select/tests/transport.rs @@ -0,0 +1,108 @@ +// Copyright 2020 Parity Technologies (UK) Ltd. +// +// Permission is hereby granted, free of charge, to any person obtaining a +// copy of this software and associated documentation files (the "Software"), +// to deal in the Software without restriction, including without limitation +// the rights to use, copy, modify, merge, publish, distribute, sublicense, +// and/or sell copies of the Software, and to permit persons to whom the +// Software is furnished to do so, subject to the following conditions: +// +// The above copyright notice and this permission notice shall be included in +// all copies or substantial portions of the Software. +// +// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS +// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE +// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER +// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING +// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER +// DEALINGS IN THE SOFTWARE. + +use futures::{channel::oneshot, prelude::*, ready}; +use libp2p_core::{ + multiaddr::Protocol, + muxing::StreamMuxerBox, + transport::{self, MemoryTransport}, + upgrade, Multiaddr, Transport, +}; +use libp2p_identity as identity; +use libp2p_identity::PeerId; +use libp2p_mplex::MplexConfig; +use libp2p_plaintext::PlainText2Config; +use libp2p_swarm::{dummy, SwarmBuilder, SwarmEvent}; +use rand::random; +use std::task::Poll; + +type TestTransport = transport::Boxed<(PeerId, StreamMuxerBox)>; + +fn mk_transport(up: upgrade::Version) -> (PeerId, TestTransport) { + let keys = identity::Keypair::generate_ed25519(); + let id = keys.public().to_peer_id(); + ( + id, + MemoryTransport::default() + .upgrade(up) + .authenticate(PlainText2Config { + local_public_key: keys.public(), + }) + .multiplex(MplexConfig::default()) + .boxed(), + ) +} + +/// Tests the transport upgrade process with all supported +/// upgrade protocol versions. +#[test] +fn transport_upgrade() { + let _ = env_logger::try_init(); + + fn run(up: upgrade::Version) { + let (dialer_id, dialer_transport) = mk_transport(up); + let (listener_id, listener_transport) = mk_transport(up); + + let listen_addr = Multiaddr::from(Protocol::Memory(random::())); + + let mut dialer = + SwarmBuilder::with_async_std_executor(dialer_transport, dummy::Behaviour, dialer_id) + .build(); + let mut listener = SwarmBuilder::with_async_std_executor( + listener_transport, + dummy::Behaviour, + listener_id, + ) + .build(); + + listener.listen_on(listen_addr).unwrap(); + let (addr_sender, addr_receiver) = oneshot::channel(); + + let client = async move { + let addr = addr_receiver.await.unwrap(); + dialer.dial(addr).unwrap(); + futures::future::poll_fn(move |cx| loop { + if let SwarmEvent::ConnectionEstablished { .. } = + ready!(dialer.poll_next_unpin(cx)).unwrap() + { + return Poll::Ready(()); + } + }) + .await + }; + + let mut addr_sender = Some(addr_sender); + let server = futures::future::poll_fn(move |cx| loop { + match ready!(listener.poll_next_unpin(cx)).unwrap() { + SwarmEvent::NewListenAddr { address, .. } => { + addr_sender.take().unwrap().send(address).unwrap(); + } + SwarmEvent::IncomingConnection { .. } => {} + SwarmEvent::ConnectionEstablished { .. } => return Poll::Ready(()), + _ => {} + } + }); + + async_std::task::block_on(future::select(Box::pin(server), Box::pin(client))); + } + + run(upgrade::Version::V1); + run(upgrade::Version::V1Lazy); +} diff --git a/client/litep2p/src/peer_id.rs b/client/litep2p/src/peer_id.rs new file mode 100644 index 00000000..1a13ba03 --- /dev/null +++ b/client/litep2p/src/peer_id.rs @@ -0,0 +1,354 @@ +// Copyright 2018 Parity Technologies (UK) Ltd. +// Copyright 2023 litep2p developers +// +// Permission is hereby granted, free of charge, to any person obtaining a +// copy of this software and associated documentation files (the "Software"), +// to deal in the Software without restriction, including without limitation +// the rights to use, copy, modify, merge, publish, distribute, sublicense, +// and/or sell copies of the Software, and to permit persons to whom the +// Software is furnished to do so, subject to the following conditions: +// +// The above copyright notice and this permission notice shall be included in +// all copies or substantial portions of the Software. +// +// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS +// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE +// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER +// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING +// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER +// DEALINGS IN THE SOFTWARE. + +#![allow(clippy::wrong_self_convention)] + +use crate::crypto::PublicKey; + +use multiaddr::{Multiaddr, Protocol}; +use multihash::{Code, Error, Multihash, MultihashDigest}; +use rand::Rng; +use serde::{Deserialize, Serialize}; +use thiserror::Error; + +use std::{convert::TryFrom, fmt, str::FromStr}; + +/// Public keys with byte-lengths smaller than `MAX_INLINE_KEY_LENGTH` will be +/// automatically used as the peer id using an identity multihash. +const MAX_INLINE_KEY_LENGTH: usize = 42; + +/// Identifier of a peer of the network. +/// +/// The data is a CIDv0 compatible multihash of the protobuf encoded public key of the peer +/// as specified in [specs/peer-ids](https://github.com/libp2p/specs/blob/master/peer-ids/peer-ids.md). +#[derive(Clone, Copy, Eq, Hash, Ord, PartialEq, PartialOrd)] +pub struct PeerId { + multihash: Multihash, +} + +impl fmt::Debug for PeerId { + fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { + f.debug_tuple("PeerId").field(&self.to_base58()).finish() + } +} + +impl fmt::Display for PeerId { + fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { + self.to_base58().fmt(f) + } +} + +impl PeerId { + /// Builds a `PeerId` from a public key. + pub fn from_public_key(key: &PublicKey) -> PeerId { + Self::from_public_key_protobuf(&key.to_protobuf_encoding()) + } + + /// Builds a `PeerId` from a public key in protobuf encoding. + pub fn from_public_key_protobuf(key_enc: &[u8]) -> PeerId { + let hash_algorithm = if key_enc.len() <= MAX_INLINE_KEY_LENGTH { + Code::Identity + } else { + Code::Sha2_256 + }; + + let multihash = hash_algorithm.digest(key_enc); + + PeerId { multihash } + } + + /// Parses a `PeerId` from bytes. + pub fn from_bytes(data: &[u8]) -> Result { + PeerId::from_multihash(Multihash::from_bytes(data)?) + .map_err(|mh| Error::UnsupportedCode(mh.code())) + } + + /// Tries to turn a `Multihash` into a `PeerId`. + /// + /// If the multihash does not use a valid hashing algorithm for peer IDs, + /// or the hash value does not satisfy the constraints for a hashed + /// peer ID, it is returned as an `Err`. + pub fn from_multihash(multihash: Multihash) -> Result { + match Code::try_from(multihash.code()) { + Ok(Code::Sha2_256) => Ok(PeerId { multihash }), + Ok(Code::Identity) if multihash.digest().len() <= MAX_INLINE_KEY_LENGTH => + Ok(PeerId { multihash }), + _ => Err(multihash), + } + } + + /// Tries to extract a [`PeerId`] from the given [`Multiaddr`]. + /// + /// In case the given [`Multiaddr`] ends with `/p2p/`, this function + /// will return the encapsulated [`PeerId`], otherwise it will return `None`. + pub fn try_from_multiaddr(address: &Multiaddr) -> Option { + address.iter().last().and_then(|p| match p { + Protocol::P2p(hash) => PeerId::from_multihash(hash).ok(), + _ => None, + }) + } + + /// Generates a random peer ID from a cryptographically secure PRNG. + /// + /// This is useful for randomly walking on a DHT, or for testing purposes. + pub fn random() -> PeerId { + let peer_id = rand::thread_rng().gen::<[u8; 32]>(); + PeerId { + multihash: Multihash::wrap(Code::Identity.into(), &peer_id) + .expect("The digest size is never too large"), + } + } + + /// Returns a raw bytes representation of this `PeerId`. + pub fn to_bytes(&self) -> Vec { + self.multihash.to_bytes() + } + + /// Returns a base-58 encoded string of this `PeerId`. + pub fn to_base58(&self) -> String { + bs58::encode(self.to_bytes()).into_string() + } + + /// Checks whether the public key passed as parameter matches the public key of this `PeerId`. + /// + /// Returns `None` if this `PeerId`s hash algorithm is not supported when encoding the + /// given public key, otherwise `Some` boolean as the result of an equality check. + pub fn is_public_key(&self, public_key: &PublicKey) -> Option { + let alg = Code::try_from(self.multihash.code()) + .expect("Internal multihash is always a valid `Code`"); + let enc = public_key.to_protobuf_encoding(); + Some(alg.digest(&enc) == self.multihash) + } +} + +impl From for PeerId { + fn from(key: PublicKey) -> PeerId { + PeerId::from_public_key(&key) + } +} + +impl From<&PublicKey> for PeerId { + fn from(key: &PublicKey) -> PeerId { + PeerId::from_public_key(key) + } +} + +impl TryFrom> for PeerId { + type Error = Vec; + + fn try_from(value: Vec) -> Result { + PeerId::from_bytes(&value).map_err(|_| value) + } +} + +impl TryFrom for PeerId { + type Error = Multihash; + + fn try_from(value: Multihash) -> Result { + PeerId::from_multihash(value) + } +} + +impl AsRef for PeerId { + fn as_ref(&self) -> &Multihash { + &self.multihash + } +} + +impl From for Multihash { + fn from(peer_id: PeerId) -> Self { + peer_id.multihash + } +} + +impl From for Vec { + fn from(peer_id: PeerId) -> Self { + peer_id.to_bytes() + } +} + +impl Serialize for PeerId { + fn serialize(&self, serializer: S) -> Result + where + S: serde::Serializer, + { + if serializer.is_human_readable() { + serializer.serialize_str(&self.to_base58()) + } else { + serializer.serialize_bytes(&self.to_bytes()[..]) + } + } +} + +impl<'de> Deserialize<'de> for PeerId { + fn deserialize(deserializer: D) -> Result + where + D: serde::Deserializer<'de>, + { + use serde::de::*; + + struct PeerIdVisitor; + + impl Visitor<'_> for PeerIdVisitor { + type Value = PeerId; + + fn expecting(&self, f: &mut fmt::Formatter) -> fmt::Result { + write!(f, "valid peer id") + } + + fn visit_bytes(self, v: &[u8]) -> Result + where + E: Error, + { + PeerId::from_bytes(v).map_err(|_| Error::invalid_value(Unexpected::Bytes(v), &self)) + } + + fn visit_str(self, v: &str) -> Result + where + E: Error, + { + PeerId::from_str(v).map_err(|_| Error::invalid_value(Unexpected::Str(v), &self)) + } + } + + if deserializer.is_human_readable() { + deserializer.deserialize_str(PeerIdVisitor) + } else { + deserializer.deserialize_bytes(PeerIdVisitor) + } + } +} + +#[derive(Debug, Error)] +pub enum ParseError { + #[error("base-58 decode error: {0}")] + B58(#[from] bs58::decode::Error), + #[error("decoding multihash failed")] + MultiHash, +} + +impl FromStr for PeerId { + type Err = ParseError; + + #[inline] + fn from_str(s: &str) -> Result { + let bytes = bs58::decode(s).into_vec()?; + PeerId::from_bytes(&bytes).map_err(|_| ParseError::MultiHash) + } +} + +#[cfg(test)] +mod tests { + use crate::{crypto::ed25519::Keypair, PeerId}; + use multiaddr::{Multiaddr, Protocol}; + use multihash::Multihash; + + #[test] + fn peer_id_is_public_key() { + let key = Keypair::generate().public(); + let peer_id = key.to_peer_id(); + assert_eq!(peer_id.is_public_key(&key.into()), Some(true)); + } + + #[test] + fn peer_id_into_bytes_then_from_bytes() { + let peer_id = Keypair::generate().public().to_peer_id(); + let second = PeerId::from_bytes(&peer_id.to_bytes()).unwrap(); + assert_eq!(peer_id, second); + } + + #[test] + fn peer_id_to_base58_then_back() { + let peer_id = Keypair::generate().public().to_peer_id(); + let second: PeerId = peer_id.to_base58().parse().unwrap(); + assert_eq!(peer_id, second); + } + + #[test] + fn random_peer_id_is_valid() { + for _ in 0..5000 { + let peer_id = PeerId::random(); + assert_eq!(peer_id, PeerId::from_bytes(&peer_id.to_bytes()).unwrap()); + } + } + + #[test] + fn peer_id_from_multiaddr() { + let address = "[::1]:1337".parse::().unwrap(); + let peer = PeerId::random(); + let address = Multiaddr::empty() + .with(Protocol::from(address.ip())) + .with(Protocol::Tcp(address.port())) + .with(Protocol::P2p(Multihash::from(peer))); + + assert_eq!(peer, PeerId::try_from_multiaddr(&address).unwrap()); + } + + #[test] + fn peer_id_from_multiaddr_no_peer_id() { + let address = "[::1]:1337".parse::().unwrap(); + let address = Multiaddr::empty() + .with(Protocol::from(address.ip())) + .with(Protocol::Tcp(address.port())); + + assert!(PeerId::try_from_multiaddr(&address).is_none()); + } + + #[test] + fn peer_id_from_bytes() { + let peer = PeerId::random(); + let bytes = peer.to_bytes(); + + assert_eq!(PeerId::try_from(bytes).unwrap(), peer); + } + + #[test] + fn peer_id_as_multihash() { + let peer = PeerId::random(); + let multihash = Multihash::from(peer); + + assert_eq!(&multihash, peer.as_ref()); + assert_eq!(PeerId::try_from(multihash).unwrap(), peer); + } + + #[test] + fn serialize_deserialize() { + let peer = PeerId::random(); + let serialized = serde_json::to_string(&peer).unwrap(); + let deserialized = serde_json::from_str(&serialized).unwrap(); + + assert_eq!(peer, deserialized); + } + + #[test] + fn invalid_multihash() { + fn test() -> crate::Result { + let bytes = [ + 0x16, 0x20, 0x64, 0x4b, 0xcc, 0x7e, 0x56, 0x43, 0x73, 0x04, 0x09, 0x99, 0xaa, 0xc8, + 0x9e, 0x76, 0x22, 0xf3, 0xca, 0x71, 0xfb, 0xa1, 0xd9, 0x72, 0xfd, 0x94, 0xa3, 0x1c, + 0x3b, 0xfb, 0xf2, 0x4e, 0x39, 0x38, + ]; + + PeerId::from_multihash(Multihash::from_bytes(&bytes).unwrap()).map_err(From::from) + } + let _error = test().unwrap_err(); + } +} diff --git a/client/litep2p/src/protocol/connection.rs b/client/litep2p/src/protocol/connection.rs new file mode 100644 index 00000000..a11bee60 --- /dev/null +++ b/client/litep2p/src/protocol/connection.rs @@ -0,0 +1,275 @@ +// Copyright 2023 litep2p developers +// +// Permission is hereby granted, free of charge, to any person obtaining a +// copy of this software and associated documentation files (the "Software"), +// to deal in the Software without restriction, including without limitation +// the rights to use, copy, modify, merge, publish, distribute, sublicense, +// and/or sell copies of the Software, and to permit persons to whom the +// Software is furnished to do so, subject to the following conditions: +// +// The above copyright notice and this permission notice shall be included in +// all copies or substantial portions of the Software. +// +// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS +// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE +// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER +// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING +// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER +// DEALINGS IN THE SOFTWARE. + +//! Connection-related helper code. + +use crate::{ + error::{Error, SubstreamError}, + protocol::{protocol_set::ProtocolCommand, transport_service::SubstreamKeepAlive}, + types::{protocol::ProtocolName, ConnectionId, SubstreamId}, +}; + +use tokio::sync::mpsc::{error::TrySendError, Sender, WeakSender}; + +/// Connection type, from the point of view of the protocol. +#[derive(Debug, Clone)] +enum ConnectionType { + /// Connection is actively kept open. + Active(Sender), + + /// Connection is considered inactive as far as the protocol is concerned + /// and if no substreams are being opened and no protocol is interested in + /// keeping the connection open, it will be closed. + Inactive(WeakSender), +} + +/// Type representing a handle to connection which allows protocols to communicate with the +/// connection. +#[derive(Debug, Clone)] +pub struct ConnectionHandle { + /// Connection type. + connection: ConnectionType, + + /// Connection ID. + connection_id: ConnectionId, +} + +impl ConnectionHandle { + /// Create new [`ConnectionHandle`]. + /// + /// By default the connection is set as `Active` to give protocols time to open a substream if + /// they wish. + pub fn new(connection_id: ConnectionId, connection: Sender) -> Self { + Self { + connection_id, + connection: ConnectionType::Active(connection), + } + } + + /// Get active sender from the [`ConnectionHandle`] and then downgrade it to an inactive + /// connection. + /// + /// This function is only called once when the connection is established to remote peer and that + /// one time the connection type must be `Active`, unless there is a logic bug in `litep2p`. + pub fn downgrade(&mut self) -> Self { + match &self.connection { + ConnectionType::Active(connection) => { + let handle = Self::new(self.connection_id, connection.clone()); + self.connection = ConnectionType::Inactive(connection.downgrade()); + + handle + } + ConnectionType::Inactive(_) => { + panic!("state mismatch: tried to downgrade an inactive connection") + } + } + } + + /// Get reference to connection ID. + pub fn connection_id(&self) -> &ConnectionId { + &self.connection_id + } + + /// Mark connection as closed. + pub fn close(&mut self) { + if let ConnectionType::Active(connection) = &self.connection { + self.connection = ConnectionType::Inactive(connection.downgrade()); + } + } + + /// Try to upgrade the connection to active state. + pub fn try_upgrade(&mut self) { + if let ConnectionType::Inactive(inactive) = &self.connection { + if let Some(active) = inactive.upgrade() { + self.connection = ConnectionType::Active(active); + } + } + } + + /// Attempt to acquire permit which will keep the connection open for indefinite time. + pub fn try_get_permit(&self) -> Option { + match &self.connection { + ConnectionType::Active(active) => Some(Permit::new(active.clone())), + ConnectionType::Inactive(inactive) => Some(Permit::new(inactive.upgrade()?)), + } + } + + /// Open substream to remote peer over `protocol` and send the acquired permit to the + /// transport so it can be given to the opened substream. + pub fn open_substream( + &mut self, + protocol: ProtocolName, + fallback_names: Vec, + substream_id: SubstreamId, + permit: Permit, + keep_alive: SubstreamKeepAlive, + ) -> Result<(), SubstreamError> { + match &self.connection { + ConnectionType::Active(active) => active.clone(), + ConnectionType::Inactive(inactive) => + inactive.upgrade().ok_or(SubstreamError::ConnectionClosed)?, + } + .try_send(ProtocolCommand::OpenSubstream { + protocol: protocol.clone(), + fallback_names, + substream_id, + connection_id: self.connection_id, + permit, + keep_alive, + }) + .map_err(|error| match error { + TrySendError::Full(_) => SubstreamError::ChannelClogged, + TrySendError::Closed(_) => SubstreamError::ConnectionClosed, + }) + } + + /// Force close connection. + pub fn force_close(&mut self) -> crate::Result<()> { + match &self.connection { + ConnectionType::Active(active) => active.clone(), + ConnectionType::Inactive(inactive) => + inactive.upgrade().ok_or(Error::ConnectionClosed)?, + } + .try_send(ProtocolCommand::ForceClose) + .map_err(|error| match error { + TrySendError::Full(_) => Error::ChannelClogged, + TrySendError::Closed(_) => Error::ConnectionClosed, + }) + } + + /// Check if the connection is active. + pub fn is_active(&self) -> bool { + matches!(self.connection, ConnectionType::Active(_)) + } +} + +/// Type which allows to keep the connection opened and not allow the keep-alive mechanism to close +/// it. +/// +/// The [`Permit`] is created when beginning to open a substream and passed on until it reaches +/// [`TransportService`](crate::protocol::TransportService), where the connection is upgraded +/// (which means it won't be closed) and the permit is not needed anymore and dropped. +/// +/// The [`Permit`] as also stored in the context of substreams that need to keep the connection +/// alive while they exist (i.e., marked with [`SubstreamKeepAlive::Yes`]). +/// +/// The permit is designed to be short-lived, please ensure it is dropped as soon as it is no longer +/// relevant +#[derive(Debug, Clone)] +pub struct Permit { + /// Active connection. + _connection: Sender, +} + +impl Permit { + /// Create new [`Permit`] which allows the connection to be kept open. + pub fn new(_connection: Sender) -> Self { + Self { _connection } + } +} + +#[cfg(test)] +mod tests { + use super::*; + use tokio::sync::mpsc::channel; + + #[test] + #[should_panic] + fn downgrade_inactive_connection() { + let (tx, _rx) = channel(1); + let mut handle = ConnectionHandle::new(ConnectionId::new(), tx); + + let mut new_handle = handle.downgrade(); + assert!(std::matches!( + new_handle.connection, + ConnectionType::Inactive(_) + )); + + // try to downgrade an already-downgraded connection + let _handle = new_handle.downgrade(); + } + + #[tokio::test] + async fn open_substream_open_downgraded_connection() { + let (tx, mut rx) = channel(1); + let mut handle = ConnectionHandle::new(ConnectionId::new(), tx); + let mut handle = handle.downgrade(); + let permit = handle.try_get_permit().unwrap(); + + let result = handle.open_substream( + ProtocolName::from("/protocol/1"), + Vec::new(), + SubstreamId::new(), + permit, + SubstreamKeepAlive::Yes, + ); + + assert!(result.is_ok()); + assert!(rx.recv().await.is_some()); + } + + #[tokio::test] + async fn open_substream_closed_downgraded_connection() { + let (tx, _rx) = channel(1); + let mut handle = ConnectionHandle::new(ConnectionId::new(), tx); + let mut handle = handle.downgrade(); + let permit = handle.try_get_permit().unwrap(); + drop(_rx); + + let result = handle.open_substream( + ProtocolName::from("/protocol/1"), + Vec::new(), + SubstreamId::new(), + permit, + SubstreamKeepAlive::Yes, + ); + + assert!(result.is_err()); + } + + #[tokio::test] + async fn open_substream_channel_clogged() { + let (tx, _rx) = channel(1); + let mut handle = ConnectionHandle::new(ConnectionId::new(), tx); + let mut handle = handle.downgrade(); + let permit = handle.try_get_permit().unwrap(); + + let result = handle.open_substream( + ProtocolName::from("/protocol/1"), + Vec::new(), + SubstreamId::new(), + permit, + SubstreamKeepAlive::Yes, + ); + assert!(result.is_ok()); + + let permit = handle.try_get_permit().unwrap(); + match handle.open_substream( + ProtocolName::from("/protocol/1"), + Vec::new(), + SubstreamId::new(), + permit, + SubstreamKeepAlive::Yes, + ) { + Err(SubstreamError::ChannelClogged) => {} + error => panic!("invalid error: {error:?}"), + } + } +} diff --git a/client/litep2p/src/protocol/libp2p/bitswap/config.rs b/client/litep2p/src/protocol/libp2p/bitswap/config.rs new file mode 100644 index 00000000..b5ce71a4 --- /dev/null +++ b/client/litep2p/src/protocol/libp2p/bitswap/config.rs @@ -0,0 +1,73 @@ +// Copyright 2023 litep2p developers +// +// Permission is hereby granted, free of charge, to any person obtaining a +// copy of this software and associated documentation files (the "Software"), +// to deal in the Software without restriction, including without limitation +// the rights to use, copy, modify, merge, publish, distribute, sublicense, +// and/or sell copies of the Software, and to permit persons to whom the +// Software is furnished to do so, subject to the following conditions: +// +// The above copyright notice and this permission notice shall be included in +// all copies or substantial portions of the Software. +// +// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS +// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE +// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER +// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING +// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER +// DEALINGS IN THE SOFTWARE. + +use crate::{ + codec::ProtocolCodec, + protocol::libp2p::bitswap::{BitswapCommand, BitswapEvent, BitswapHandle}, + types::protocol::ProtocolName, + DEFAULT_CHANNEL_SIZE, +}; + +use tokio::sync::mpsc::{channel, Receiver, Sender}; + +/// IPFS Bitswap protocol name as a string. +pub const PROTOCOL_NAME: &str = "/ipfs/bitswap/1.2.0"; + +/// Maximum size for `/ipfs/bitswap/1.2.0` substream message. Includes enough room for protobuf +/// overhead. Enforced on the transport level. +pub const MAX_MESSAGE_SIZE: usize = 4 * 1024 * 1024; + +/// Maximum batch size of all blocks in a single Bitswap message combined. Enforced on the +/// application protocol level. +pub const MAX_BATCH_SIZE: usize = 2 * 1024 * 1024; + +/// Bitswap configuration. +#[derive(Debug)] +pub struct Config { + /// Protocol name. + pub(crate) protocol: ProtocolName, + + /// Protocol codec. + pub(crate) codec: ProtocolCodec, + + /// TX channel for sending events to the user protocol. + pub(super) event_tx: Sender, + + /// RX channel for receiving commands from the user. + pub(super) cmd_rx: Receiver, +} + +impl Config { + /// Create new [`Config`]. + pub fn new() -> (Self, BitswapHandle) { + let (event_tx, event_rx) = channel(DEFAULT_CHANNEL_SIZE); + let (cmd_tx, cmd_rx) = channel(DEFAULT_CHANNEL_SIZE); + + ( + Self { + cmd_rx, + event_tx, + protocol: ProtocolName::from(PROTOCOL_NAME), + codec: ProtocolCodec::UnsignedVarint(Some(MAX_MESSAGE_SIZE)), + }, + BitswapHandle::new(event_rx, cmd_tx), + ) + } +} diff --git a/client/litep2p/src/protocol/libp2p/bitswap/handle.rs b/client/litep2p/src/protocol/libp2p/bitswap/handle.rs new file mode 100644 index 00000000..630c8d7f --- /dev/null +++ b/client/litep2p/src/protocol/libp2p/bitswap/handle.rs @@ -0,0 +1,143 @@ +// Copyright 2023 litep2p developers +// +// Permission is hereby granted, free of charge, to any person obtaining a +// copy of this software and associated documentation files (the "Software"), +// to deal in the Software without restriction, including without limitation +// the rights to use, copy, modify, merge, publish, distribute, sublicense, +// and/or sell copies of the Software, and to permit persons to whom the +// Software is furnished to do so, subject to the following conditions: +// +// The above copyright notice and this permission notice shall be included in +// all copies or substantial portions of the Software. +// +// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS +// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE +// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER +// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING +// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER +// DEALINGS IN THE SOFTWARE. + +//! Bitswap handle for communicating with the bitswap protocol implementation. + +use crate::{ + protocol::libp2p::bitswap::{BlockPresenceType, WantType}, + PeerId, +}; + +use cid::Cid; +use tokio::sync::mpsc::{Receiver, Sender}; + +use std::{ + pin::Pin, + task::{Context, Poll}, +}; + +/// Events emitted by the bitswap protocol. +#[derive(Debug)] +pub enum BitswapEvent { + /// Bitswap request. + Request { + /// Peer ID. + peer: PeerId, + + /// Requested CIDs. + cids: Vec<(Cid, WantType)>, + }, + + /// Bitswap response. + Response { + /// Peer ID. + peer: PeerId, + + /// Response entries: vector of CIDs with either block data or block presence. + responses: Vec, + }, +} + +/// Response type for received bitswap request. +#[derive(Debug, Clone)] +#[cfg_attr(feature = "fuzz", derive(serde::Serialize, serde::Deserialize))] +pub enum ResponseType { + /// Block. + Block { + /// CID. + cid: Cid, + + /// Found block. + block: Vec, + }, + + /// Presense. + Presence { + /// CID. + cid: Cid, + + /// Whether the requested block exists or not. + presence: BlockPresenceType, + }, +} + +/// Commands sent from the user to `Bitswap`. +#[derive(Debug)] +#[cfg_attr(feature = "fuzz", derive(serde::Serialize, serde::Deserialize))] +pub enum BitswapCommand { + /// Send bitswap request. + SendRequest { + /// Peer ID. + peer: PeerId, + + /// Requested CIDs. + cids: Vec<(Cid, WantType)>, + }, + + /// Send bitswap response. + SendResponse { + /// Peer ID. + peer: PeerId, + + /// CIDs. + responses: Vec, + }, +} + +/// Handle for communicating with the bitswap protocol. +pub struct BitswapHandle { + /// RX channel for receiving bitswap events. + event_rx: Receiver, + + /// TX channel for sending commads to `Bitswap`. + cmd_tx: Sender, +} + +impl BitswapHandle { + /// Create new [`BitswapHandle`]. + pub(super) fn new(event_rx: Receiver, cmd_tx: Sender) -> Self { + Self { event_rx, cmd_tx } + } + + /// Send `request` to `peer`. + pub async fn send_request(&self, peer: PeerId, cids: Vec<(Cid, WantType)>) { + let _ = self.cmd_tx.send(BitswapCommand::SendRequest { peer, cids }).await; + } + + /// Send `response` to `peer`. + pub async fn send_response(&self, peer: PeerId, responses: Vec) { + let _ = self.cmd_tx.send(BitswapCommand::SendResponse { peer, responses }).await; + } + + #[cfg(feature = "fuzz")] + /// Expose functionality for fuzzing + pub async fn fuzz_send_message(&mut self, command: BitswapCommand) -> crate::Result<()> { + let _ = self.cmd_tx.try_send(command); + Ok(()) + } +} + +impl futures::Stream for BitswapHandle { + type Item = BitswapEvent; + + fn poll_next(mut self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll> { + Pin::new(&mut self.event_rx).poll_recv(cx) + } +} diff --git a/client/litep2p/src/protocol/libp2p/bitswap/mod.rs b/client/litep2p/src/protocol/libp2p/bitswap/mod.rs new file mode 100644 index 00000000..9c4cac9c --- /dev/null +++ b/client/litep2p/src/protocol/libp2p/bitswap/mod.rs @@ -0,0 +1,819 @@ +// Copyright 2023 litep2p developers +// +// Permission is hereby granted, free of charge, to any person obtaining a +// copy of this software and associated documentation files (the "Software"), +// to deal in the Software without restriction, including without limitation +// the rights to use, copy, modify, merge, publish, distribute, sublicense, +// and/or sell copies of the Software, and to permit persons to whom the +// Software is furnished to do so, subject to the following conditions: +// +// The above copyright notice and this permission notice shall be included in +// all copies or substantial portions of the Software. +// +// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS +// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE +// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER +// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING +// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER +// DEALINGS IN THE SOFTWARE. + +//! [`/ipfs/bitswap/1.2.0`](https://github.com/ipfs/specs/blob/main/BITSWAP.md) implementation. + +use crate::{ + error::{Error, ImmediateDialError}, + protocol::{Direction, TransportEvent, TransportService}, + substream::Substream, + types::{ + multihash::{Code, MultihashDigest}, + SubstreamId, + }, + PeerId, +}; + +use bytes::Bytes; +use cid::{Cid, Version}; +use prost::Message; +use tokio::sync::mpsc::{Receiver, Sender}; +use tokio_stream::{StreamExt, StreamMap}; + +pub use config::Config; +pub use handle::{BitswapCommand, BitswapEvent, BitswapHandle, ResponseType}; +pub use schema::bitswap::{wantlist::WantType, BlockPresenceType}; +use std::{ + collections::{hash_map::Entry, vec_deque::Drain, HashMap, HashSet, VecDeque}, + time::Duration, +}; + +mod config; +mod handle; + +mod schema { + pub(super) mod bitswap { + include!(concat!(env!("OUT_DIR"), "/bitswap.rs")); + } +} + +/// Log target for the file. +const LOG_TARGET: &str = "litep2p::ipfs::bitswap"; + +/// Write timeout for outbound messages. +const WRITE_TIMEOUT: Duration = Duration::from_secs(15); + +/// Bitswap metadata. +#[derive(Debug)] +struct Prefix { + /// CID version. + version: Version, + + /// CID codec. + codec: u64, + + /// CID multihash type. + multihash_type: u64, + + /// CID multihash length. + multihash_len: u8, +} + +impl Prefix { + /// Convert the prefix to encoded bytes. + pub fn to_bytes(&self) -> Vec { + let mut res = Vec::with_capacity(4 * 10); + + let mut buf = unsigned_varint::encode::u64_buffer(); + let version = unsigned_varint::encode::u64(self.version.into(), &mut buf); + res.extend_from_slice(version); + + let mut buf = unsigned_varint::encode::u64_buffer(); + let codec = unsigned_varint::encode::u64(self.codec, &mut buf); + res.extend_from_slice(codec); + + let mut buf = unsigned_varint::encode::u64_buffer(); + let multihash_type = unsigned_varint::encode::u64(self.multihash_type, &mut buf); + res.extend_from_slice(multihash_type); + + let mut buf = unsigned_varint::encode::u64_buffer(); + let multihash_len = unsigned_varint::encode::u64(self.multihash_len as u64, &mut buf); + res.extend_from_slice(multihash_len); + res + } + + /// Parse byte representation of prefix. + pub fn from_bytes(prefix_bytes: &[u8]) -> Option { + let (version, rest) = unsigned_varint::decode::u64(prefix_bytes).ok()?; + let (codec, rest) = unsigned_varint::decode::u64(rest).ok()?; + let (multihash_type, rest) = unsigned_varint::decode::u64(rest).ok()?; + let (multihash_len, rest) = unsigned_varint::decode::u64(rest).ok()?; + if !rest.is_empty() { + return None; + } + + let version = Version::try_from(version).ok()?; + let multihash_len = u8::try_from(multihash_len).ok()?; + + Some(Prefix { + version, + codec, + multihash_type, + multihash_len, + }) + } +} + +/// Action to perform when substream is opened. +#[derive(Debug)] +enum SubstreamAction { + /// Send a request. + SendRequest(Vec<(Cid, WantType)>), + /// Send a response. + SendResponse(Vec), +} + +/// Bitswap protocol. +pub(crate) struct Bitswap { + // Connection service. + service: TransportService, + + /// TX channel for sending events to the user protocol. + event_tx: Sender, + + /// RX channel for receiving commands from `BitswapHandle`. + cmd_rx: Receiver, + + /// Pending outbound actions. + pending_outbound: HashMap>, + + /// Inbound substreams. + inbound: StreamMap, + + /// Outbound substreams. + outbound: HashMap, + + /// Peers waiting for dial. + pending_dials: HashSet, +} + +impl Bitswap { + /// Create new [`Bitswap`] protocol. + pub(crate) fn new(service: TransportService, config: Config) -> Self { + Self { + service, + cmd_rx: config.cmd_rx, + event_tx: config.event_tx, + pending_outbound: HashMap::new(), + inbound: StreamMap::new(), + outbound: HashMap::new(), + pending_dials: HashSet::new(), + } + } + + /// Substream opened to remote peer. + fn on_inbound_substream(&mut self, peer: PeerId, substream: Substream) { + tracing::debug!(target: LOG_TARGET, ?peer, "handle inbound substream"); + + if self.inbound.insert(peer, substream).is_some() { + // Only one inbound substream per peer is allowed in order to constrain resources. + tracing::debug!( + target: LOG_TARGET, + ?peer, + "dropping inbound substream as remote opened a new one", + ); + } + } + + /// Message received from remote peer. + async fn on_message_received( + &mut self, + peer: PeerId, + message: bytes::BytesMut, + ) -> Result<(), Error> { + tracing::trace!(target: LOG_TARGET, ?peer, "handle inbound message"); + + let message = schema::bitswap::Message::decode(message)?; + + // Check if this is a request (has wantlist with entries). + if let Some(wantlist) = &message.wantlist { + if !wantlist.entries.is_empty() { + let cids = wantlist + .entries + .iter() + .filter_map(|entry| { + let cid = Cid::read_bytes(entry.block.as_slice()).ok()?; + + let want_type = match entry.want_type { + 0 => WantType::Block, + 1 => WantType::Have, + _ => return None, + }; + + Some((cid, want_type)) + }) + .collect::>(); + + if !cids.is_empty() { + let _ = self.event_tx.send(BitswapEvent::Request { peer, cids }).await; + } + } + } + + // Check if this is a response (has payload or block presences). + if !message.payload.is_empty() || !message.block_presences.is_empty() { + let mut responses = Vec::new(); + + // Process payload (blocks). + for block in message.payload { + let Some(Prefix { + version, + codec, + multihash_type, + multihash_len: _, + }) = Prefix::from_bytes(&block.prefix) + else { + tracing::trace!(target: LOG_TARGET, ?peer, "invalid CID prefix received"); + continue; + }; + + // Create multihash from the block data. + let Ok(code) = Code::try_from(multihash_type) else { + tracing::trace!( + target: LOG_TARGET, + ?peer, + multihash_type, + "usupported multihash type", + ); + continue; + }; + + let multihash = code.digest(&block.data); + + // We need to convert multihash to version supported by `cid` crate. + let Ok(multihash) = + cid::multihash::Multihash::wrap(multihash.code(), multihash.digest()) + else { + tracing::trace!( + target: LOG_TARGET, + ?peer, + multihash_type, + "multihash size > 64 unsupported", + ); + continue; + }; + + match Cid::new(version, codec, multihash) { + Ok(cid) => responses.push(ResponseType::Block { + cid, + block: block.data, + }), + Err(error) => tracing::trace!( + target: LOG_TARGET, + ?peer, + ?error, + "invalid CID received", + ), + } + } + + // Process block presences. + for presence in message.block_presences { + if let Ok(cid) = Cid::read_bytes(&presence.cid[..]) { + let presence_type = match presence.r#type { + 0 => BlockPresenceType::Have, + 1 => BlockPresenceType::DontHave, + _ => continue, + }; + + responses.push(ResponseType::Presence { + cid, + presence: presence_type, + }); + } + } + + if !responses.is_empty() { + let _ = self.event_tx.send(BitswapEvent::Response { peer, responses }).await; + } + } + + Ok(()) + } + + /// Handle opened outbound substream. + async fn on_outbound_substream( + &mut self, + peer: PeerId, + substream_id: SubstreamId, + mut substream: Substream, + ) { + let Some(actions) = self.pending_outbound.remove(&peer) else { + tracing::warn!(target: LOG_TARGET, ?peer, ?substream_id, "pending outbound entry doesn't exist"); + return; + }; + + tracing::trace!(target: LOG_TARGET, ?peer, "handle outbound substream"); + + for action in actions { + match action { + SubstreamAction::SendRequest(cids) => { + if let Err(error) = send_request(&mut substream, cids).await { + // Drop the substream and all actions in case of sending error. + tracing::debug!(target: LOG_TARGET, ?peer, ?error, "bitswap request failed"); + return; + } + } + SubstreamAction::SendResponse(entries) => { + if let Err(error) = send_response(&mut substream, entries).await { + // Drop the substream and all actions in case of sending error. + tracing::debug!(target: LOG_TARGET, ?peer, ?error, "bitswap response failed"); + return; + } + } + } + } + + self.outbound.insert(peer, substream); + } + + /// Handle connection established event. + fn on_connection_established(&mut self, peer: PeerId) { + // If we have pending actions for this peer, open a substream. + if self.pending_dials.remove(&peer) { + tracing::trace!( + target: LOG_TARGET, + ?peer, + "open substream after connection established", + ); + + if let Err(error) = self.service.open_substream(peer) { + tracing::debug!( + target: LOG_TARGET, + ?peer, + ?error, + "failed to open substream after connection established", + ); + // Drop all pending actions; they are not going to be handled anyway, and we need + // the entry to be empty to properly open subsequent substreams. + self.pending_outbound.remove(&peer); + } + } + } + + /// Open substream or dial a peer. + fn open_substream_or_dial(&mut self, peer: PeerId) { + tracing::trace!(target: LOG_TARGET, ?peer, "open substream"); + + if let Err(error) = self.service.open_substream(peer) { + tracing::trace!( + target: LOG_TARGET, + ?peer, + ?error, + "failed to open substream, dialing peer", + ); + + // Failed to open substream, try to dial the peer. + match self.service.dial(&peer) { + Ok(()) => { + // Store the peer to open a substream once it is connected. + self.pending_dials.insert(peer); + } + Err(ImmediateDialError::AlreadyConnected) => { + // By the time we tried to dial peer, it got connected. + if let Err(error) = self.service.open_substream(peer) { + tracing::trace!( + target: LOG_TARGET, + ?peer, + ?error, + "failed to open substream for a second time", + ); + } + } + Err(error) => { + tracing::debug!(target: LOG_TARGET, ?peer, ?error, "failed to dial peer"); + } + } + } + } + + /// Handle bitswap request. + async fn on_bitswap_request(&mut self, peer: PeerId, cids: Vec<(Cid, WantType)>) { + // Try to send request over existing substream first. + if let Entry::Occupied(mut entry) = self.outbound.entry(peer) { + if send_request(entry.get_mut(), cids.clone()).await.is_ok() { + return; + } else { + tracing::debug!( + target: LOG_TARGET, + ?peer, + "failed to send request over existing substream", + ); + entry.remove(); + } + } + + // Store pending actions for once the substream is opened. + let pending_actions = self.pending_outbound.entry(peer).or_default(); + // If we inserted the default empty entry above, this means no pending substream + // was requested by previous calls to `on_bitswap_request`. We will request a substream + // in this case below. + let no_substream_pending = pending_actions.is_empty(); + + pending_actions.push(SubstreamAction::SendRequest(cids)); + + if no_substream_pending { + self.open_substream_or_dial(peer); + } + } + + /// Handle bitswap response. + async fn on_bitswap_response(&mut self, peer: PeerId, responses: Vec) { + // Try to send response over existing substream first. + if let Entry::Occupied(mut entry) = self.outbound.entry(peer) { + if send_response(entry.get_mut(), responses.clone()).await.is_ok() { + return; + } else { + tracing::debug!( + target: LOG_TARGET, + ?peer, + "failed to send response over existing substream", + ); + entry.remove(); + } + } + + // Store pending actions for later and open substream if not requested already. + let pending_actions = self.pending_outbound.entry(peer).or_default(); + let no_pending_substream = pending_actions.is_empty(); + pending_actions.push(SubstreamAction::SendResponse(responses)); + + if no_pending_substream { + self.open_substream_or_dial(peer); + } + } + + /// Start [`Bitswap`] event loop. + pub async fn run(mut self) { + tracing::debug!(target: LOG_TARGET, "starting bitswap event loop"); + + loop { + tokio::select! { + event = self.service.next() => match event { + Some(TransportEvent::ConnectionEstablished { peer, .. }) => { + self.on_connection_established(peer); + } + Some(TransportEvent::SubstreamOpened { + peer, + substream, + direction, + .. + }) => match direction { + Direction::Inbound => self.on_inbound_substream(peer, substream), + Direction::Outbound(substream_id) => + self.on_outbound_substream(peer, substream_id, substream).await, + }, + None => return, + event => tracing::trace!(target: LOG_TARGET, ?event, "unhandled event"), + }, + command = self.cmd_rx.recv() => match command { + Some(BitswapCommand::SendRequest { peer, cids }) => { + self.on_bitswap_request(peer, cids).await; + } + Some(BitswapCommand::SendResponse { peer, responses }) => { + self.on_bitswap_response(peer, responses).await; + } + None => return, + }, + Some((peer, message)) = self.inbound.next(), if !self.inbound.is_empty() => { + match message { + Ok(message) => if let Err(e) = self.on_message_received(peer, message).await { + tracing::trace!( + target: LOG_TARGET, + ?peer, + ?e, + "error handling inbound message, dropping substream", + ); + self.inbound.remove(&peer); + }, + Err(e) => { + tracing::trace!( + target: LOG_TARGET, + ?peer, + ?e, + "inbound substream closed", + ); + self.inbound.remove(&peer); + }, + } + } + } + } + } +} + +async fn send_request(substream: &mut Substream, cids: Vec<(Cid, WantType)>) -> Result<(), Error> { + let request = schema::bitswap::Message { + wantlist: Some(schema::bitswap::Wantlist { + entries: cids + .into_iter() + .map(|(cid, want_type)| schema::bitswap::wantlist::Entry { + block: cid.to_bytes(), + priority: 1, + cancel: false, + want_type: want_type as i32, + send_dont_have: false, + }) + .collect(), + full: false, + }), + ..Default::default() + }; + + let message = request.encode_to_vec().into(); + match tokio::time::timeout(WRITE_TIMEOUT, substream.send_framed(message)).await { + Err(_) => Err(Error::Timeout), + Ok(Err(e)) => Err(Error::SubstreamError(e)), + Ok(Ok(())) => Ok(()), + } +} + +async fn send_response(substream: &mut Substream, entries: Vec) -> Result<(), Error> { + // Send presences in a separate message to not deal with it when batching blocks below. + if let Some((message, cid_count)) = + presences_message(entries.iter().filter_map(|entry| match entry { + ResponseType::Presence { cid, presence } => Some((*cid, *presence)), + ResponseType::Block { .. } => None, + })) + { + if message.len() <= config::MAX_MESSAGE_SIZE { + tracing::trace!( + target: LOG_TARGET, + cid_count, + "sending Bitswap presence message", + ); + match tokio::time::timeout(WRITE_TIMEOUT, substream.send_framed(message)).await { + Err(_) => return Err(Error::Timeout), + Ok(Err(e)) => return Err(Error::SubstreamError(e)), + Ok(Ok(())) => {} + } + } else { + // This should never happen in practice, but log a warning if the presence message + // exceeded [`config::MAX_MESSAGE_SIZE`]. + tracing::warn!( + target: LOG_TARGET, + size = message.len(), + max_size = config::MAX_MESSAGE_SIZE, + "outgoing Bitswap presence message exceeded max size", + ); + } + } + + // Send blocks in batches of up to [`config::MAX_BATCH_SIZE`] bytes. + let mut blocks = entries + .into_iter() + .filter_map(|entry| match entry { + ResponseType::Block { cid, block } => Some((cid, block)), + ResponseType::Presence { .. } => None, + }) + .collect::>(); + + while let Some(batch) = extract_next_batch(&mut blocks, config::MAX_BATCH_SIZE) { + if let Some((message, block_count)) = blocks_message(batch) { + if message.len() <= config::MAX_MESSAGE_SIZE { + tracing::trace!( + target: LOG_TARGET, + block_count, + "sending Bitswap blocks message", + ); + match tokio::time::timeout(WRITE_TIMEOUT, substream.send_framed(message)).await { + Err(_) => return Err(Error::Timeout), + Ok(Err(e)) => return Err(Error::SubstreamError(e)), + Ok(Ok(())) => {} + } + } else { + // This should never happen in practice, but log a warning if the blocks message + // exceeded [`config::MAX_MESSAGE_SIZE`]. + tracing::warn!( + target: LOG_TARGET, + size = message.len(), + max_size = config::MAX_MESSAGE_SIZE, + "outgoing Bitswap blocks message exceeded max size", + ); + } + } + } + + Ok(()) +} + +fn presences_message( + presences: impl IntoIterator, +) -> Option<(Bytes, usize)> { + let message = schema::bitswap::Message { + // Set wantlist to not cause null pointer dereference in older versions of Kubo. + wantlist: Some(Default::default()), + block_presences: presences + .into_iter() + .map(|(cid, presence)| schema::bitswap::BlockPresence { + cid: cid.to_bytes(), + r#type: presence as i32, + }) + .collect(), + ..Default::default() + }; + + let count = message.block_presences.len(); + + (count > 0).then(|| (message.encode_to_vec().into(), count)) +} + +fn blocks_message(blocks: impl IntoIterator)>) -> Option<(Bytes, usize)> { + let message = schema::bitswap::Message { + // Set wantlist to not cause null pointer dereference in older versions of Kubo. + wantlist: Some(Default::default()), + payload: blocks + .into_iter() + .map(|(cid, block)| { + let prefix = Prefix { + version: cid.version(), + codec: cid.codec(), + multihash_type: cid.hash().code(), + multihash_len: cid.hash().size(), + } + .to_bytes(); + + schema::bitswap::Block { + prefix, + data: block, + } + }) + .collect(), + ..Default::default() + }; + + let count = message.payload.len(); + + (count > 0).then(|| (message.encode_to_vec().into(), count)) +} + +/// Extract a batch of blocks of no more than `max_size` from `blocks`. +/// Returns `None` if no more blocks are left. +fn extract_next_batch<'a>( + blocks: &'a mut VecDeque<(Cid, Vec)>, + max_batch_size: usize, +) -> Option)>> { + // Get rid of oversized blocks to not stall the processing by not being able to queue them. + loop { + if let Some(block) = blocks.front() { + if block.1.len() > max_batch_size { + tracing::warn!( + target: LOG_TARGET, + cid = block.0.to_string(), + size = block.1.len(), + max_batch_size, + "outgoing Bitswap block exceeded max batch size", + ); + blocks.pop_front(); + } else { + break; + } + } else { + return None; + } + } + + // Determine how many blocks we can batch. Note that we can always batch at least one + // block due to check above. + let mut total_size = 0; + let mut block_count = 0; + + for b in blocks.iter() { + let next_block_size = b.1.len(); + if total_size + next_block_size > max_batch_size { + break; + } + total_size += next_block_size; + block_count += 1; + } + + Some(blocks.drain(..block_count)) +} + +#[cfg(test)] +mod tests { + use cid::multihash::Multihash; + + use super::*; + + fn cid(block: &[u8]) -> Cid { + let codec = 0x55; + let multihash = Code::Sha2_256.digest(block); + let multihash = + Multihash::wrap(multihash.code(), multihash.digest()).expect("to be valid multihash"); + + Cid::new_v1(codec, multihash) + } + + #[test] + fn extract_next_batch_fits_max_size() { + let max_size = 100; + + let block1 = vec![0x01; 10]; + let block2 = vec![0x02; 10]; + let block3 = vec![0x03; 10]; + + let blocks = vec![ + (cid(&block1), block1), + (cid(&block2), block2), + (cid(&block3), block3), + ]; + let mut blocks_deque = blocks.iter().cloned().collect::>(); + + let batch = extract_next_batch(&mut blocks_deque, max_size).unwrap(); + assert_eq!(batch.collect::>(), blocks); + + assert!(extract_next_batch(&mut blocks_deque, max_size).is_none()); + } + + #[test] + fn extract_next_batch_chunking_exact() { + let max_size = 20; + + let block1 = vec![0x01; 10]; + let block2 = vec![0x02; 10]; + let block3 = vec![0x03; 10]; + + let blocks = vec![ + (cid(&block1), block1.clone()), + (cid(&block2), block2.clone()), + (cid(&block3), block3.clone()), + ]; + let chunk1 = vec![ + (cid(&block1), block1.clone()), + (cid(&block2), block2.clone()), + ]; + let chunk2 = vec![(cid(&block3), block3.clone())]; + let mut blocks_deque = blocks.iter().cloned().collect::>(); + + let batch = extract_next_batch(&mut blocks_deque, max_size).unwrap(); + assert_eq!(batch.collect::>(), chunk1); + + let batch = extract_next_batch(&mut blocks_deque, max_size).unwrap(); + assert_eq!(batch.collect::>(), chunk2); + + assert!(extract_next_batch(&mut blocks_deque, max_size).is_none()); + } + + #[test] + fn extract_next_batch_chunking_less_than() { + let max_size = 20; + + let block1 = vec![0x01; 10]; + let block2 = vec![0x02; 9]; + let block3 = vec![0x03; 10]; + + let blocks = vec![ + (cid(&block1), block1.clone()), + (cid(&block2), block2.clone()), + (cid(&block3), block3.clone()), + ]; + let chunk1 = vec![ + (cid(&block1), block1.clone()), + (cid(&block2), block2.clone()), + ]; + let chunk2 = vec![(cid(&block3), block3.clone())]; + let mut blocks_deque = blocks.iter().cloned().collect::>(); + + let batch = extract_next_batch(&mut blocks_deque, max_size).unwrap(); + assert_eq!(batch.collect::>(), chunk1); + + let batch = extract_next_batch(&mut blocks_deque, max_size).unwrap(); + assert_eq!(batch.collect::>(), chunk2); + + assert!(extract_next_batch(&mut blocks_deque, max_size).is_none()); + } + + #[test] + fn extract_next_batch_oversized_blocks_discarded() { + let max_size = 20; + + let block1 = vec![0x01; 10]; + let block2 = vec![0x02; 101]; + let block3 = vec![0x03; 10]; + + let blocks = vec![ + (cid(&block1), block1.clone()), + (cid(&block2), block2.clone()), + (cid(&block3), block3.clone()), + ]; + let chunk1 = vec![(cid(&block1), block1.clone())]; + let chunk2 = vec![(cid(&block3), block3.clone())]; + let mut blocks_deque = blocks.iter().cloned().collect::>(); + + let batch = extract_next_batch(&mut blocks_deque, max_size).unwrap(); + assert_eq!(batch.collect::>(), chunk1); + + let batch = extract_next_batch(&mut blocks_deque, max_size).unwrap(); + assert_eq!(batch.collect::>(), chunk2); + + assert!(extract_next_batch(&mut blocks_deque, max_size).is_none()); + } +} diff --git a/client/litep2p/src/protocol/libp2p/identify.rs b/client/litep2p/src/protocol/libp2p/identify.rs new file mode 100644 index 00000000..3f19511a --- /dev/null +++ b/client/litep2p/src/protocol/libp2p/identify.rs @@ -0,0 +1,525 @@ +// Copyright 2023 litep2p developers +// +// Permission is hereby granted, free of charge, to any person obtaining a +// copy of this software and associated documentation files (the "Software"), +// to deal in the Software without restriction, including without limitation +// the rights to use, copy, modify, merge, publish, distribute, sublicense, +// and/or sell copies of the Software, and to permit persons to whom the +// Software is furnished to do so, subject to the following conditions: +// +// The above copyright notice and this permission notice shall be included in +// all copies or substantial portions of the Software. +// +// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS +// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE +// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER +// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING +// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER +// DEALINGS IN THE SOFTWARE. + +//! [`/ipfs/identify/1.0.0`](https://github.com/libp2p/specs/blob/master/identify/README.md) implementation. + +use crate::{ + codec::ProtocolCodec, + crypto::PublicKey, + error::{Error, SubstreamError}, + protocol::{Direction, TransportEvent, TransportService}, + substream::Substream, + transport::Endpoint, + types::{protocol::ProtocolName, SubstreamId}, + utils::futures_stream::FuturesStream, + PeerId, DEFAULT_CHANNEL_SIZE, +}; + +use futures::{future::BoxFuture, Stream, StreamExt}; +use multiaddr::Multiaddr; +use prost::Message; +use tokio::sync::mpsc::{channel, Sender}; +use tokio_stream::wrappers::ReceiverStream; + +use std::{ + collections::{HashMap, HashSet}, + time::Duration, +}; + +/// Log target for the file. +const LOG_TARGET: &str = "litep2p::ipfs::identify"; + +/// IPFS Identify protocol name +const PROTOCOL_NAME: &str = "/ipfs/id/1.0.0"; + +/// IPFS Identify push protocol name. +const _PUSH_PROTOCOL_NAME: &str = "/ipfs/id/push/1.0.0"; + +/// Default agent version. +const DEFAULT_AGENT: &str = "litep2p/1.0.0"; + +/// Size for `/ipfs/ping/1.0.0` payloads. +// TODO: https://github.com/paritytech/litep2p/issues/334 what is the max size? +const IDENTIFY_PAYLOAD_SIZE: usize = 4096; + +mod identify_schema { + include!(concat!(env!("OUT_DIR"), "/identify.rs")); +} + +/// Identify configuration. +pub struct Config { + /// Protocol name. + pub(crate) protocol: ProtocolName, + + /// Codec used by the protocol. + pub(crate) codec: ProtocolCodec, + + /// TX channel for sending events to the user protocol. + tx_event: Sender, + + // Public key of the local node, filled by `Litep2p`. + pub(crate) public: Option, + + /// Protocols supported by the local node, filled by `Litep2p`. + pub(crate) protocols: Vec, + + /// Protocol version. + pub(crate) protocol_version: String, + + /// User agent. + pub(crate) user_agent: Option, +} + +impl Config { + /// Create new [`Config`]. + /// + /// Returns a config that is given to `Litep2pConfig` and an event stream for + /// [`IdentifyEvent`]s. + pub fn new( + protocol_version: String, + user_agent: Option, + ) -> (Self, Box + Send + Unpin>) { + let (tx_event, rx_event) = channel(DEFAULT_CHANNEL_SIZE); + + ( + Self { + tx_event, + public: None, + protocol_version, + user_agent, + codec: ProtocolCodec::UnsignedVarint(Some(IDENTIFY_PAYLOAD_SIZE)), + protocols: Vec::new(), + protocol: ProtocolName::from(PROTOCOL_NAME), + }, + Box::new(ReceiverStream::new(rx_event)), + ) + } +} + +/// Events emitted by Identify protocol. +#[derive(Debug)] +pub enum IdentifyEvent { + /// Peer identified. + PeerIdentified { + /// Peer ID. + peer: PeerId, + + /// Protocol version. + protocol_version: Option, + + /// User agent. + user_agent: Option, + + /// Supported protocols. + supported_protocols: HashSet, + + /// Observed address. + observed_address: Multiaddr, + + /// Listen addresses. + listen_addresses: Vec, + }, +} + +/// Identify response received from remote. +struct IdentifyResponse { + /// Remote peer ID. + peer: PeerId, + + /// Protocol version. + protocol_version: Option, + + /// User agent. + user_agent: Option, + + /// Protocols supported by remote. + supported_protocols: HashSet, + + /// Remote's listen addresses. + listen_addresses: Vec, + + /// Observed address. + observed_address: Option, +} + +pub(crate) struct Identify { + // Connection service. + service: TransportService, + + /// TX channel for sending events to the user protocol. + tx: Sender, + + /// Connected peers and their observed addresses. + peers: HashMap, + + // Public key of the local node, filled by `Litep2p`. + public: PublicKey, + + /// Local peer ID. + local_peer_id: PeerId, + + /// Protocol version. + protocol_version: String, + + /// User agent. + user_agent: String, + + /// Protocols supported by the local node, filled by `Litep2p`. + protocols: Vec, + + /// Pending outbound substreams. + pending_outbound: FuturesStream>>, + + /// Pending inbound substreams. + pending_inbound: FuturesStream>, +} + +impl Identify { + /// Create new [`Identify`] protocol. + pub(crate) fn new(service: TransportService, config: Config) -> Self { + // The public key is always supplied by litep2p and is the one + // used to identify the local peer. This is a similar story to the + // supported protocols. + let public = config.public.expect("public key to always be supplied by litep2p; qed"); + let local_peer_id = public.to_peer_id(); + + Self { + service, + tx: config.tx_event, + peers: HashMap::new(), + public, + local_peer_id, + protocol_version: config.protocol_version, + user_agent: config.user_agent.unwrap_or(DEFAULT_AGENT.to_string()), + pending_inbound: FuturesStream::new(), + pending_outbound: FuturesStream::new(), + protocols: config.protocols.iter().map(|protocol| protocol.to_string()).collect(), + } + } + + /// Connection established to remote peer. + fn on_connection_established(&mut self, peer: PeerId, endpoint: Endpoint) -> crate::Result<()> { + tracing::trace!(target: LOG_TARGET, ?peer, ?endpoint, "connection established"); + + self.service.open_substream(peer)?; + self.peers.insert(peer, endpoint); + + Ok(()) + } + + /// Connection closed to remote peer. + fn on_connection_closed(&mut self, peer: PeerId) { + tracing::trace!(target: LOG_TARGET, ?peer, "connection closed"); + + self.peers.remove(&peer); + } + + /// Inbound substream opened. + fn on_inbound_substream( + &mut self, + peer: PeerId, + protocol: ProtocolName, + mut substream: Substream, + ) { + tracing::trace!( + target: LOG_TARGET, + ?peer, + ?protocol, + "inbound substream opened" + ); + + let observed_addr = match self.peers.get(&peer) { + Some(endpoint) => Some(endpoint.address().to_vec()), + None => { + tracing::warn!( + target: LOG_TARGET, + ?peer, + %protocol, + "inbound identify substream opened for peer who doesn't exist", + ); + None + } + }; + + let mut listen_addr: HashSet<_> = + self.service.listen_addresses().into_iter().map(|addr| addr.to_vec()).collect(); + listen_addr + .extend(self.service.public_addresses().inner.read().iter().map(|addr| addr.to_vec())); + + let identify = identify_schema::Identify { + protocol_version: Some(self.protocol_version.clone()), + agent_version: Some(self.user_agent.clone()), + public_key: Some(self.public.to_protobuf_encoding()), + listen_addrs: listen_addr.into_iter().collect(), + observed_addr, + protocols: self.protocols.clone(), + }; + + tracing::trace!( + target: LOG_TARGET, + ?peer, + ?identify, + "sending identify response", + ); + + let mut msg = Vec::with_capacity(identify.encoded_len()); + identify.encode(&mut msg).expect("`msg` to have enough capacity"); + + self.pending_inbound.push(Box::pin(async move { + match tokio::time::timeout(Duration::from_secs(10), substream.send_framed(msg.into())) + .await + { + Err(error) => { + tracing::debug!( + target: LOG_TARGET, + ?peer, + ?error, + "timed out while sending ipfs identify response", + ); + } + Ok(Err(error)) => { + tracing::debug!( + target: LOG_TARGET, + ?peer, + ?error, + "failed to send ipfs identify response", + ); + } + Ok(_) => { + substream.close().await; + } + } + })) + } + + /// Outbound substream opened. + fn on_outbound_substream( + &mut self, + peer: PeerId, + protocol: ProtocolName, + substream_id: SubstreamId, + mut substream: Substream, + ) { + tracing::trace!( + target: LOG_TARGET, + ?peer, + ?protocol, + ?substream_id, + "outbound substream opened" + ); + + let local_peer_id = self.local_peer_id; + + self.pending_outbound.push(Box::pin(async move { + let payload = + match tokio::time::timeout(Duration::from_secs(10), substream.next()).await { + Err(_) => return Err(Error::Timeout), + Ok(None) => + return Err(Error::SubstreamError(SubstreamError::ReadFailure(Some( + substream_id, + )))), + Ok(Some(Err(error))) => return Err(error.into()), + Ok(Some(Ok(payload))) => payload, + }; + + let info = identify_schema::Identify::decode(payload.to_vec().as_slice()).map_err( + |err| { + tracing::debug!(target: LOG_TARGET, ?peer, ?err, "peer identified provided undecodable identify response"); + err + })?; + + tracing::trace!(target: LOG_TARGET, ?peer, ?info, "peer identified"); + + let listen_addresses = info + .listen_addrs + .iter() + .filter_map(|address| { + let address = Multiaddr::try_from(address.clone()).ok()?; + + // Ensure the address ends with the provided peer ID and is not empty. + if address.is_empty() { + tracing::debug!(target: LOG_TARGET, ?peer, ?address, "peer identified provided empty listen address"); + return None; + } + if let Some(multiaddr::Protocol::P2p(peer_id)) = address.iter().last() { + if peer_id != peer.into() { + tracing::debug!(target: LOG_TARGET, ?peer, ?address, "peer identified provided listen address with incorrect peer ID; discarding the address"); + return None; + } + } + + Some(address) + }) + .collect(); + + let observed_address = + info.observed_addr.and_then(|address| { + let address = Multiaddr::try_from(address).ok()?; + + if address.is_empty() { + tracing::debug!(target: LOG_TARGET, ?peer, ?address, "peer identified provided empty observed address"); + return None; + } + + if let Some(multiaddr::Protocol::P2p(peer_id)) = address.iter().last() { + if peer_id != local_peer_id.into() { + tracing::debug!(target: LOG_TARGET, ?peer, ?address, "peer identified provided observed address with peer ID not matching our peer ID; discarding address"); + return None; + } + } + + Some(address) + }); + + let protocol_version = info.protocol_version; + let user_agent = info.agent_version; + + Ok(IdentifyResponse { + peer, + protocol_version, + user_agent, + supported_protocols: HashSet::from_iter(info.protocols), + observed_address, + listen_addresses, + }) + })); + } + + /// Start [`Identify`] event loop. + pub async fn run(mut self) { + tracing::debug!(target: LOG_TARGET, "starting identify event loop"); + + loop { + tokio::select! { + event = self.service.next() => match event { + None => { + tracing::warn!(target: LOG_TARGET, "transport service stream ended, terminating identify event loop"); + return + }, + Some(TransportEvent::ConnectionEstablished { peer, endpoint }) => { + let _ = self.on_connection_established(peer, endpoint); + } + Some(TransportEvent::ConnectionClosed { peer }) => { + self.on_connection_closed(peer); + } + Some(TransportEvent::SubstreamOpened { + peer, + protocol, + direction, + substream, + .. + }) => match direction { + Direction::Inbound => self.on_inbound_substream(peer, protocol, substream), + Direction::Outbound(substream_id) => self.on_outbound_substream(peer, protocol, substream_id, substream), + }, + _ => {} + }, + _ = self.pending_inbound.next(), if !self.pending_inbound.is_empty() => {} + event = self.pending_outbound.next(), if !self.pending_outbound.is_empty() => match event { + Some(Ok(response)) => { + let _ = self.tx + .send(IdentifyEvent::PeerIdentified { + peer: response.peer, + protocol_version: response.protocol_version, + user_agent: response.user_agent, + supported_protocols: response.supported_protocols.into_iter().map(From::from).collect(), + observed_address: response.observed_address.map_or(Multiaddr::empty(), |address| address), + listen_addresses: response.listen_addresses, + }) + .await; + } + Some(Err(error)) => tracing::debug!(target: LOG_TARGET, ?error, "failed to read ipfs identify response"), + None => {} + } + } + } + } +} + +#[cfg(test)] +mod tests { + use super::*; + use crate::{config::ConfigBuilder, transport::tcp::config::Config as TcpConfig, Litep2p}; + use multiaddr::{Multiaddr, Protocol}; + + fn create_litep2p() -> ( + Litep2p, + Box + Send + Unpin>, + PeerId, + ) { + let (identify_config, identify) = + Config::new("1.0.0".to_string(), Some("litep2p/1.0.0".to_string())); + + let keypair = crate::crypto::ed25519::Keypair::generate(); + let peer = PeerId::from_public_key(&crate::crypto::PublicKey::Ed25519(keypair.public())); + let config = ConfigBuilder::new() + .with_keypair(keypair) + .with_tcp(TcpConfig { + listen_addresses: vec!["/ip6/::1/tcp/0".parse().unwrap()], + ..Default::default() + }) + .with_libp2p_identify(identify_config) + .build(); + + (Litep2p::new(config).unwrap(), identify, peer) + } + + #[tokio::test] + async fn update_identify_addresses() { + // Create two instances of litep2p + let (mut litep2p1, mut event_stream1, peer1) = create_litep2p(); + let (mut litep2p2, mut event_stream2, _peer2) = create_litep2p(); + let litep2p1_address = litep2p1.listen_addresses().next().unwrap(); + + let multiaddr: Multiaddr = "/ip6/::9/tcp/111".parse().unwrap(); + // Litep2p1 is now reporting the new address. + assert!(litep2p1.public_addresses().add_address(multiaddr.clone()).unwrap()); + + // Dial `litep2p1` + litep2p2.dial_address(litep2p1_address.clone()).await.unwrap(); + + let expected_multiaddr = multiaddr.with(Protocol::P2p(peer1.into())); + + tokio::spawn(async move { + loop { + tokio::select! { + _ = litep2p1.next_event() => {} + _event = event_stream1.next() => {} + } + } + }); + + loop { + tokio::select! { + _ = litep2p2.next_event() => {} + event = event_stream2.next() => match event { + Some(IdentifyEvent::PeerIdentified { + listen_addresses, + .. + }) => { + assert!(listen_addresses.iter().any(|address| address == &expected_multiaddr)); + break; + } + _ => {} + } + } + } + } +} diff --git a/client/litep2p/src/protocol/libp2p/kademlia/bucket.rs b/client/litep2p/src/protocol/libp2p/kademlia/bucket.rs new file mode 100644 index 00000000..4c999efc --- /dev/null +++ b/client/litep2p/src/protocol/libp2p/kademlia/bucket.rs @@ -0,0 +1,191 @@ +// Copyright 2018-2019 Parity Technologies (UK) Ltd. +// Copyright 2023 litep2p developers +// +// Permission is hereby granted, free of charge, to any person obtaining a +// copy of this software and associated documentation files (the "Software"), +// to deal in the Software without restriction, including without limitation +// the rights to use, copy, modify, merge, publish, distribute, sublicense, +// and/or sell copies of the Software, and to permit persons to whom the +// Software is furnished to do so, subject to the following conditions: +// +// The above copyright notice and this permission notice shall be included in +// all copies or substantial portions of the Software. +// +// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS +// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE +// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER +// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING +// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER +// DEALINGS IN THE SOFTWARE. + +//! Kademlia k-bucket implementation. + +use crate::{ + protocol::libp2p::kademlia::types::{ConnectionType, KademliaPeer, Key}, + PeerId, +}; + +/// K-bucket entry. +#[derive(Debug)] +pub enum KBucketEntry<'a> { + /// Entry points to local node. + LocalNode, + + /// Occupied entry to a connected node. + Occupied(&'a mut KademliaPeer), + + /// Vacant entry. + Vacant(&'a mut KademliaPeer), + + /// Entry not found and any present entry cannot be replaced. + NoSlot, +} + +impl<'a> KBucketEntry<'a> { + /// Insert new entry into the entry if possible. + pub fn insert(&'a mut self, new: KademliaPeer) { + if let KBucketEntry::Vacant(old) = self { + old.peer = new.peer; + old.key = Key::from(new.peer); + old.address_store = new.address_store; + old.connection = new.connection; + } + } +} + +/// Kademlia k-bucket. +pub struct KBucket { + // TODO: https://github.com/paritytech/litep2p/issues/335 + // store peers in a btreemap with increasing distance from local key? + nodes: Vec, +} + +impl KBucket { + /// Create new [`KBucket`]. + pub fn new() -> Self { + Self { + nodes: Vec::with_capacity(20), + } + } + + /// Get entry into the bucket. + // TODO: https://github.com/paritytech/litep2p/pull/184 should optimize this + pub fn entry(&mut self, key: Key) -> KBucketEntry<'_> { + for i in 0..self.nodes.len() { + if self.nodes[i].key == key { + return KBucketEntry::Occupied(&mut self.nodes[i]); + } + } + + if self.nodes.len() < 20 { + self.nodes.push(KademliaPeer::new( + PeerId::random(), + vec![], + ConnectionType::NotConnected, + )); + let len = self.nodes.len() - 1; + return KBucketEntry::Vacant(&mut self.nodes[len]); + } + + for i in 0..self.nodes.len() { + match self.nodes[i].connection { + ConnectionType::NotConnected | ConnectionType::CannotConnect => { + return KBucketEntry::Vacant(&mut self.nodes[i]); + } + _ => continue, + } + } + + KBucketEntry::NoSlot + } + + /// Get iterator over the k-bucket, sorting the k-bucket entries in increasing order + /// by distance. + pub fn closest_iter(&self, target: &Key) -> impl Iterator { + let mut nodes: Vec<_> = self.nodes.iter().collect(); + nodes.sort_by(|a, b| target.distance(&a.key).cmp(&target.distance(&b.key))); + nodes.into_iter().filter(|peer| !peer.address_store.is_empty()) + } +} + +#[cfg(test)] +mod tests { + use super::*; + + #[test] + fn closest_iter() { + let mut bucket = KBucket::new(); + + // add some random nodes to the bucket + let _ = (0..10) + .map(|_| { + let peer = PeerId::random(); + bucket.nodes.push(KademliaPeer::new(peer, vec![], ConnectionType::Connected)); + + peer + }) + .collect::>(); + + let target = Key::from(PeerId::random()); + let iter = bucket.closest_iter(&target); + let mut prev = None; + + for node in iter { + if let Some(distance) = prev { + assert!(distance < target.distance(&node.key)); + } + + prev = Some(target.distance(&node.key)); + } + } + + #[test] + fn ignore_peers_with_no_addresses() { + let mut bucket = KBucket::new(); + + // add peers with no addresses to the bucket + let _ = (0..10) + .map(|_| { + let peer = PeerId::random(); + bucket.nodes.push(KademliaPeer::new( + peer, + vec![], + ConnectionType::NotConnected, + )); + + peer + }) + .collect::>(); + + // add three peers with an address + let _ = (0..3) + .map(|_| { + let peer = PeerId::random(); + bucket.nodes.push(KademliaPeer::new( + peer, + vec!["/ip6/::/tcp/0".parse().unwrap()], + ConnectionType::Connected, + )); + + peer + }) + .collect::>(); + + let target = Key::from(PeerId::random()); + let iter = bucket.closest_iter(&target); + let mut prev = None; + let mut num_peers = 0usize; + + for node in iter { + if let Some(distance) = prev { + assert!(distance < target.distance(&node.key)); + } + + num_peers += 1; + prev = Some(target.distance(&node.key)); + } + + assert_eq!(num_peers, 3usize); + } +} diff --git a/client/litep2p/src/protocol/libp2p/kademlia/config.rs b/client/litep2p/src/protocol/libp2p/kademlia/config.rs new file mode 100644 index 00000000..79758c67 --- /dev/null +++ b/client/litep2p/src/protocol/libp2p/kademlia/config.rs @@ -0,0 +1,344 @@ +// Copyright 2023 litep2p developers +// +// Permission is hereby granted, free of charge, to any person obtaining a +// copy of this software and associated documentation files (the "Software"), +// to deal in the Software without restriction, including without limitation +// the rights to use, copy, modify, merge, publish, distribute, sublicense, +// and/or sell copies of the Software, and to permit persons to whom the +// Software is furnished to do so, subject to the following conditions: +// +// The above copyright notice and this permission notice shall be included in +// all copies or substantial portions of the Software. +// +// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS +// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE +// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER +// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING +// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER +// DEALINGS IN THE SOFTWARE. + +use crate::{ + codec::ProtocolCodec, + protocol::libp2p::kademlia::{ + handle::{ + IncomingRecordValidationMode, KademliaCommand, KademliaEvent, KademliaHandle, + RoutingTableUpdateMode, + }, + store::MemoryStoreConfig, + }, + types::protocol::ProtocolName, + PeerId, DEFAULT_CHANNEL_SIZE, +}; + +use multiaddr::Multiaddr; +use tokio::sync::mpsc::{channel, Receiver, Sender}; + +use std::{ + collections::HashMap, + sync::{atomic::AtomicUsize, Arc}, + time::Duration, +}; + +/// Default TTL for the records. +const DEFAULT_TTL: Duration = Duration::from_secs(36 * 60 * 60); + +/// Default max number of records. +pub(super) const DEFAULT_MAX_RECORDS: usize = 1024; + +/// Default max record size. +pub(super) const DEFAULT_MAX_RECORD_SIZE_BYTES: usize = 65 * 1024; + +/// Default max provider keys. +pub(super) const DEFAULT_MAX_PROVIDER_KEYS: usize = 1024; + +/// Default max provider addresses. +pub(super) const DEFAULT_MAX_PROVIDER_ADDRESSES: usize = 30; + +/// Default max providers per key. +pub(super) const DEFAULT_MAX_PROVIDERS_PER_KEY: usize = 20; + +/// Default provider republish interval. +pub(super) const DEFAULT_PROVIDER_REFRESH_INTERVAL: Duration = Duration::from_secs(22 * 60 * 60); + +/// Default provider record TTL. +pub(super) const DEFAULT_PROVIDER_TTL: Duration = Duration::from_secs(48 * 60 * 60); + +/// Protocol name. +const PROTOCOL_NAME: &str = "/ipfs/kad/1.0.0"; + +/// Kademlia replication factor. +const REPLICATION_FACTOR: usize = 20usize; + +/// Kademlia maximum message size. Should fit 64 KiB value + 4 KiB key. +const DEFAULT_MAX_MESSAGE_SIZE: usize = 70 * 1024; + +/// Kademlia configuration. +#[derive(Debug)] +pub struct Config { + // Protocol name. + // pub(crate) protocol: ProtocolName, + /// Protocol names. + pub(crate) protocol_names: Vec, + + /// Protocol codec. + pub(crate) codec: ProtocolCodec, + + /// Replication factor. + pub(super) replication_factor: usize, + + /// Known peers. + pub(super) known_peers: HashMap>, + + /// Routing table update mode. + pub(super) update_mode: RoutingTableUpdateMode, + + /// Incoming records validation mode. + pub(super) validation_mode: IncomingRecordValidationMode, + + /// Default record TTL. + pub(super) record_ttl: Duration, + + /// Provider record TTL. + pub(super) memory_store_config: MemoryStoreConfig, + + /// TX channel for sending events to `KademliaHandle`. + pub(super) event_tx: Sender, + + /// RX channel for receiving commands from `KademliaHandle`. + pub(super) cmd_rx: Receiver, + + /// Next query ID counter shared with the handle. + pub(super) next_query_id: Arc, +} + +impl Config { + fn new( + replication_factor: usize, + known_peers: HashMap>, + mut protocol_names: Vec, + update_mode: RoutingTableUpdateMode, + validation_mode: IncomingRecordValidationMode, + record_ttl: Duration, + memory_store_config: MemoryStoreConfig, + max_message_size: usize, + ) -> (Self, KademliaHandle) { + let (cmd_tx, cmd_rx) = channel(DEFAULT_CHANNEL_SIZE); + let (event_tx, event_rx) = channel(DEFAULT_CHANNEL_SIZE); + let next_query_id = Arc::new(AtomicUsize::new(0usize)); + + // if no protocol names were provided, use the default protocol + if protocol_names.is_empty() { + protocol_names.push(ProtocolName::from(PROTOCOL_NAME)); + } + + ( + Config { + protocol_names, + update_mode, + validation_mode, + record_ttl, + memory_store_config, + codec: ProtocolCodec::UnsignedVarint(Some(max_message_size)), + replication_factor, + known_peers, + cmd_rx, + event_tx, + next_query_id: next_query_id.clone(), + }, + KademliaHandle::new(cmd_tx, event_rx, next_query_id), + ) + } + + /// Build default Kademlia configuration. + pub fn default() -> (Self, KademliaHandle) { + Self::new( + REPLICATION_FACTOR, + HashMap::new(), + Vec::new(), + RoutingTableUpdateMode::Automatic, + IncomingRecordValidationMode::Automatic, + DEFAULT_TTL, + Default::default(), + DEFAULT_MAX_MESSAGE_SIZE, + ) + } +} + +/// Configuration builder for Kademlia. +#[derive(Debug)] +pub struct ConfigBuilder { + /// Replication factor. + pub(super) replication_factor: usize, + + /// Routing table update mode. + pub(super) update_mode: RoutingTableUpdateMode, + + /// Incoming records validation mode. + pub(super) validation_mode: IncomingRecordValidationMode, + + /// Known peers. + pub(super) known_peers: HashMap>, + + /// Protocol names. + pub(super) protocol_names: Vec, + + /// Default TTL for the records. + pub(super) record_ttl: Duration, + + /// Memory store configuration. + pub(super) memory_store_config: MemoryStoreConfig, + + /// Maximum message size. + pub(crate) max_message_size: usize, +} + +impl Default for ConfigBuilder { + fn default() -> Self { + Self::new() + } +} + +impl ConfigBuilder { + /// Create new [`ConfigBuilder`]. + pub fn new() -> Self { + Self { + replication_factor: REPLICATION_FACTOR, + known_peers: HashMap::new(), + protocol_names: Vec::new(), + update_mode: RoutingTableUpdateMode::Automatic, + validation_mode: IncomingRecordValidationMode::Automatic, + record_ttl: DEFAULT_TTL, + memory_store_config: Default::default(), + max_message_size: DEFAULT_MAX_MESSAGE_SIZE, + } + } + + /// Set replication factor. + pub fn with_replication_factor(mut self, replication_factor: usize) -> Self { + self.replication_factor = replication_factor; + self + } + + /// Seed Kademlia with one or more known peers. + pub fn with_known_peers(mut self, peers: HashMap>) -> Self { + self.known_peers = peers; + self + } + + /// Set routing table update mode. + pub fn with_routing_table_update_mode(mut self, mode: RoutingTableUpdateMode) -> Self { + self.update_mode = mode; + self + } + + /// Set incoming records validation mode. + pub fn with_incoming_records_validation_mode( + mut self, + mode: IncomingRecordValidationMode, + ) -> Self { + self.validation_mode = mode; + self + } + + /// Set Kademlia protocol names, overriding the default protocol name. + /// + /// The order of the protocol names signifies preference so if, for example, there are two + /// protocols: + /// * `/kad/2.0.0` + /// * `/kad/1.0.0` + /// + /// Where `/kad/2.0.0` is the preferred version, then that should be in `protocol_names` before + /// `/kad/1.0.0`. + pub fn with_protocol_names(mut self, protocol_names: Vec) -> Self { + self.protocol_names = protocol_names; + self + } + + /// Set default TTL for the records. + /// + /// If unspecified, the default TTL is 36 hours. + pub fn with_record_ttl(mut self, record_ttl: Duration) -> Self { + self.record_ttl = record_ttl; + self + } + + /// Set maximum number of records in the memory store. + /// + /// If unspecified, the default maximum number of records is 1024. + pub fn with_max_records(mut self, max_records: usize) -> Self { + self.memory_store_config.max_records = max_records; + self + } + + /// Set maximum record size in bytes. + /// + /// If unspecified, the default maximum record size is 65 KiB. + pub fn with_max_record_size(mut self, max_record_size_bytes: usize) -> Self { + self.memory_store_config.max_record_size_bytes = max_record_size_bytes; + self + } + + /// Set maximum number of provider keys in the memory store. + /// + /// If unspecified, the default maximum number of provider keys is 1024. + pub fn with_max_provider_keys(mut self, max_provider_keys: usize) -> Self { + self.memory_store_config.max_provider_keys = max_provider_keys; + self + } + + /// Set maximum number of provider addresses per provider in the memory store. + /// + /// If unspecified, the default maximum number of provider addresses is 30. + pub fn with_max_provider_addresses(mut self, max_provider_addresses: usize) -> Self { + self.memory_store_config.max_provider_addresses = max_provider_addresses; + self + } + + /// Set maximum number of providers per key in the memory store. + /// + /// If unspecified, the default maximum number of providers per key is 20. + pub fn with_max_providers_per_key(mut self, max_providers_per_key: usize) -> Self { + self.memory_store_config.max_providers_per_key = max_providers_per_key; + self + } + + /// Set TTL for the provider records. Recommended value is 2 * (refresh interval) + 10%. + /// + /// If unspecified, the default TTL is 48 hours. + pub fn with_provider_record_ttl(mut self, provider_record_ttl: Duration) -> Self { + self.memory_store_config.provider_ttl = provider_record_ttl; + self + } + + /// Set the refresh (republish) interval for provider records. + /// + /// If unspecified, the default interval is 22 hours. + pub fn with_provider_refresh_interval(mut self, provider_refresh_interval: Duration) -> Self { + self.memory_store_config.provider_refresh_interval = provider_refresh_interval; + self + } + + /// Set the maximum Kademlia message size. + /// + /// Should fit `MemoryStore` max record size. If unspecified, the default maximum message size + /// is 70 KiB. + pub fn with_max_message_size(mut self, max_message_size: usize) -> Self { + self.max_message_size = max_message_size; + self + } + + /// Build Kademlia [`Config`]. + pub fn build(self) -> (Config, KademliaHandle) { + Config::new( + self.replication_factor, + self.known_peers, + self.protocol_names, + self.update_mode, + self.validation_mode, + self.record_ttl, + self.memory_store_config, + self.max_message_size, + ) + } +} diff --git a/client/litep2p/src/protocol/libp2p/kademlia/executor.rs b/client/litep2p/src/protocol/libp2p/kademlia/executor.rs new file mode 100644 index 00000000..65b9f68c --- /dev/null +++ b/client/litep2p/src/protocol/libp2p/kademlia/executor.rs @@ -0,0 +1,558 @@ +// Copyright 2023 litep2p developers +// +// Permission is hereby granted, free of charge, to any person obtaining a +// copy of this software and associated documentation files (the "Software"), +// to deal in the Software without restriction, including without limitation +// the rights to use, copy, modify, merge, publish, distribute, sublicense, +// and/or sell copies of the Software, and to permit persons to whom the +// Software is furnished to do so, subject to the following conditions: +// +// The above copyright notice and this permission notice shall be included in +// all copies or substantial portions of the Software. +// +// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS +// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE +// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER +// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING +// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER +// DEALINGS IN THE SOFTWARE. + +use crate::{ + protocol::libp2p::kademlia::query::QueryId, substream::Substream, + utils::futures_stream::FuturesStream, PeerId, +}; + +use bytes::{Bytes, BytesMut}; +use futures::{future::BoxFuture, Stream, StreamExt}; + +use std::{ + pin::Pin, + task::{Context, Poll}, + time::Duration, +}; + +/// Read timeout for inbound messages. +const READ_TIMEOUT: Duration = Duration::from_secs(15); +/// Write timeout for outbound messages. +const WRITE_TIMEOUT: Duration = Duration::from_secs(15); + +/// Faulure reason. +#[derive(Debug)] +pub enum FailureReason { + /// Substream was closed while reading/writing message to remote peer. + SubstreamClosed, + + /// Timeout while reading/writing to substream. + Timeout, +} + +/// Query result. +#[derive(Debug)] +pub enum QueryResult { + /// Message was sent to remote peer successfully. + /// This result is only reported for send-only queries. Queries that include reading a + /// response won't report it and will only yield a [`QueryResult::ReadSuccess`]. + SendSuccess { + /// Substream. + substream: Substream, + }, + + /// Failed to send message to remote peer. + SendFailure { + /// Failure reason. + reason: FailureReason, + }, + + /// Message was read from the remote peer successfully. + ReadSuccess { + /// Substream. + substream: Substream, + + /// Read message. + message: BytesMut, + }, + + /// Failed to read message from remote peer. + ReadFailure { + /// Failure reason. + reason: FailureReason, + }, + + /// Result that must be treated as send success. This is needed as a workaround to support + /// older litep2p nodes not sending `PUT_VALUE` ACK messages and not reading them. + // TODO: remove this as part of https://github.com/paritytech/litep2p/issues/429. + AssumeSendSuccess, +} + +/// Query result. +#[derive(Debug)] +pub struct QueryContext { + /// Peer ID. + pub peer: PeerId, + + /// Query ID. + pub query_id: Option, + + /// Query result. + pub result: QueryResult, +} + +/// Query executor. +pub struct QueryExecutor { + /// Pending futures. + futures: FuturesStream>, +} + +impl QueryExecutor { + /// Create new [`QueryExecutor`] + pub fn new() -> Self { + Self { + futures: FuturesStream::new(), + } + } + + /// Send message to remote peer. + pub fn send_message( + &mut self, + peer: PeerId, + query_id: Option, + message: Bytes, + mut substream: Substream, + ) { + self.futures.push(Box::pin(async move { + match tokio::time::timeout(WRITE_TIMEOUT, substream.send_framed(message)).await { + // Timeout error. + Err(_) => QueryContext { + peer, + query_id, + result: QueryResult::SendFailure { + reason: FailureReason::Timeout, + }, + }, + // Writing message to substream failed. + Ok(Err(_)) => QueryContext { + peer, + query_id, + result: QueryResult::SendFailure { + reason: FailureReason::SubstreamClosed, + }, + }, + Ok(Ok(())) => QueryContext { + peer, + query_id, + result: QueryResult::SendSuccess { substream }, + }, + } + })); + } + + /// Send message and ignore sending errors. + /// + /// This is a hackish way of dealing with older litep2p nodes not expecting receiving + /// `PUT_VALUE` ACK messages. This should eventually be removed. + // TODO: remove this as part of https://github.com/paritytech/litep2p/issues/429. + pub fn send_message_eat_failure( + &mut self, + peer: PeerId, + query_id: Option, + message: Bytes, + mut substream: Substream, + ) { + self.futures.push(Box::pin(async move { + match tokio::time::timeout(WRITE_TIMEOUT, substream.send_framed(message)).await { + // Timeout error. + Err(_) => QueryContext { + peer, + query_id, + result: QueryResult::AssumeSendSuccess, + }, + // Writing message to substream failed. + Ok(Err(_)) => QueryContext { + peer, + query_id, + result: QueryResult::AssumeSendSuccess, + }, + Ok(Ok(())) => QueryContext { + peer, + query_id, + result: QueryResult::SendSuccess { substream }, + }, + } + })); + } + + /// Read message from remote peer with timeout. + pub fn read_message( + &mut self, + peer: PeerId, + query_id: Option, + mut substream: Substream, + ) { + self.futures.push(Box::pin(async move { + match tokio::time::timeout(READ_TIMEOUT, substream.next()).await { + Err(_) => QueryContext { + peer, + query_id, + result: QueryResult::ReadFailure { + reason: FailureReason::Timeout, + }, + }, + Ok(Some(Ok(message))) => QueryContext { + peer, + query_id, + result: QueryResult::ReadSuccess { substream, message }, + }, + Ok(None) | Ok(Some(Err(_))) => QueryContext { + peer, + query_id, + result: QueryResult::ReadFailure { + reason: FailureReason::SubstreamClosed, + }, + }, + } + })); + } + + /// Send request to remote peer and read response. + pub fn send_request_read_response( + &mut self, + peer: PeerId, + query_id: Option, + message: Bytes, + mut substream: Substream, + ) { + self.futures.push(Box::pin(async move { + match tokio::time::timeout(WRITE_TIMEOUT, substream.send_framed(message)).await { + // Timeout error. + Err(_) => + return QueryContext { + peer, + query_id, + result: QueryResult::SendFailure { + reason: FailureReason::Timeout, + }, + }, + // Writing message to substream failed. + Ok(Err(_)) => { + let _ = substream.close().await; + return QueryContext { + peer, + query_id, + result: QueryResult::SendFailure { + reason: FailureReason::SubstreamClosed, + }, + }; + } + // This will result in either `SendAndReadSuccess` or `SendSuccessReadFailure`. + Ok(Ok(())) => (), + }; + + match tokio::time::timeout(READ_TIMEOUT, substream.next()).await { + Err(_) => QueryContext { + peer, + query_id, + result: QueryResult::ReadFailure { + reason: FailureReason::Timeout, + }, + }, + Ok(Some(Ok(message))) => QueryContext { + peer, + query_id, + result: QueryResult::ReadSuccess { substream, message }, + }, + Ok(None) | Ok(Some(Err(_))) => QueryContext { + peer, + query_id, + result: QueryResult::ReadFailure { + reason: FailureReason::SubstreamClosed, + }, + }, + } + })); + } + + /// Send request to remote peer and read the response, ignoring it and any read errors. + /// + /// This is a hackish way of dealing with older litep2p nodes not sending `PUT_VALUE` ACK + /// messages. This should eventually be removed. + // TODO: remove this as part of https://github.com/paritytech/litep2p/issues/429. + pub fn send_request_eat_response_failure( + &mut self, + peer: PeerId, + query_id: Option, + message: Bytes, + mut substream: Substream, + ) { + self.futures.push(Box::pin(async move { + match tokio::time::timeout(WRITE_TIMEOUT, substream.send_framed(message)).await { + // Timeout error. + Err(_) => + return QueryContext { + peer, + query_id, + result: QueryResult::SendFailure { + reason: FailureReason::Timeout, + }, + }, + // Writing message to substream failed. + Ok(Err(_)) => { + let _ = substream.close().await; + return QueryContext { + peer, + query_id, + result: QueryResult::SendFailure { + reason: FailureReason::SubstreamClosed, + }, + }; + } + // This will result in either `SendAndReadSuccess` or `SendSuccessReadFailure`. + Ok(Ok(())) => (), + }; + + // Ignore the read result (including errors). + if let Ok(Some(Ok(message))) = + tokio::time::timeout(READ_TIMEOUT, substream.next()).await + { + QueryContext { + peer, + query_id, + result: QueryResult::ReadSuccess { substream, message }, + } + } else { + QueryContext { + peer, + query_id, + result: QueryResult::AssumeSendSuccess, + } + } + })); + } +} + +impl Stream for QueryExecutor { + type Item = QueryContext; + + fn poll_next(mut self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll> { + self.futures.poll_next_unpin(cx) + } +} + +#[cfg(test)] +mod tests { + use super::*; + use crate::{mock::substream::MockSubstream, types::SubstreamId}; + + #[tokio::test] + async fn substream_read_timeout() { + let mut executor = QueryExecutor::new(); + let peer = PeerId::random(); + let mut substream = MockSubstream::new(); + substream.expect_poll_next().returning(|_| Poll::Pending); + let substream = Substream::new_mock(peer, SubstreamId::from(0usize), Box::new(substream)); + + executor.read_message(peer, None, substream); + + match tokio::time::timeout(Duration::from_secs(20), executor.next()).await { + Ok(Some(QueryContext { + peer: queried_peer, + query_id, + result, + })) => { + assert_eq!(peer, queried_peer); + assert!(query_id.is_none()); + assert!(std::matches!( + result, + QueryResult::ReadFailure { + reason: FailureReason::Timeout + } + )); + } + result => panic!("invalid result received: {result:?}"), + } + } + + #[tokio::test] + async fn substream_read_substream_closed() { + let mut executor = QueryExecutor::new(); + let peer = PeerId::random(); + let mut substream = MockSubstream::new(); + substream.expect_poll_next().times(1).return_once(|_| { + Poll::Ready(Some(Err(crate::error::SubstreamError::ConnectionClosed))) + }); + + executor.read_message( + peer, + Some(QueryId(1338)), + Substream::new_mock(peer, SubstreamId::from(0usize), Box::new(substream)), + ); + + match tokio::time::timeout(Duration::from_secs(20), executor.next()).await { + Ok(Some(QueryContext { + peer: queried_peer, + query_id, + result, + })) => { + assert_eq!(peer, queried_peer); + assert_eq!(query_id, Some(QueryId(1338))); + assert!(std::matches!( + result, + QueryResult::ReadFailure { + reason: FailureReason::SubstreamClosed + } + )); + } + result => panic!("invalid result received: {result:?}"), + } + } + + #[tokio::test] + async fn send_succeeds_no_message_read() { + let mut executor = QueryExecutor::new(); + let peer = PeerId::random(); + + // prepare substream which succeeds in sending the message but closes right after + let mut substream = MockSubstream::new(); + substream.expect_poll_ready().times(1).return_once(|_| Poll::Ready(Ok(()))); + substream.expect_start_send().times(1).return_once(|_| Ok(())); + substream.expect_poll_flush().times(1).return_once(|_| Poll::Ready(Ok(()))); + substream.expect_poll_next().times(1).return_once(|_| { + Poll::Ready(Some(Err(crate::error::SubstreamError::ConnectionClosed))) + }); + + executor.send_request_read_response( + peer, + Some(QueryId(1337)), + Bytes::from_static(b"hello, world"), + Substream::new_mock(peer, SubstreamId::from(0usize), Box::new(substream)), + ); + + match tokio::time::timeout(Duration::from_secs(20), executor.next()).await { + Ok(Some(QueryContext { + peer: queried_peer, + query_id, + result, + })) => { + assert_eq!(peer, queried_peer); + assert_eq!(query_id, Some(QueryId(1337))); + assert!(std::matches!( + result, + QueryResult::ReadFailure { + reason: FailureReason::SubstreamClosed + } + )); + } + result => panic!("invalid result received: {result:?}"), + } + } + + #[tokio::test] + async fn send_fails_no_message_read() { + let mut executor = QueryExecutor::new(); + let peer = PeerId::random(); + + // prepare substream which succeeds in sending the message but closes right after + let mut substream = MockSubstream::new(); + substream + .expect_poll_ready() + .times(1) + .return_once(|_| Poll::Ready(Err(crate::error::SubstreamError::ConnectionClosed))); + substream.expect_poll_close().times(1).return_once(|_| Poll::Ready(Ok(()))); + + executor.send_request_read_response( + peer, + Some(QueryId(1337)), + Bytes::from_static(b"hello, world"), + Substream::new_mock(peer, SubstreamId::from(0usize), Box::new(substream)), + ); + + match tokio::time::timeout(Duration::from_secs(20), executor.next()).await { + Ok(Some(QueryContext { + peer: queried_peer, + query_id, + result, + })) => { + assert_eq!(peer, queried_peer); + assert_eq!(query_id, Some(QueryId(1337))); + assert!(std::matches!( + result, + QueryResult::SendFailure { + reason: FailureReason::SubstreamClosed + } + )); + } + result => panic!("invalid result received: {result:?}"), + } + } + + #[tokio::test] + async fn read_message_timeout() { + let mut executor = QueryExecutor::new(); + let peer = PeerId::random(); + + // prepare substream which succeeds in sending the message but closes right after + let mut substream = MockSubstream::new(); + substream.expect_poll_next().returning(|_| Poll::Pending); + + executor.read_message( + peer, + Some(QueryId(1336)), + Substream::new_mock(peer, SubstreamId::from(0usize), Box::new(substream)), + ); + + match tokio::time::timeout(Duration::from_secs(20), executor.next()).await { + Ok(Some(QueryContext { + peer: queried_peer, + query_id, + result, + })) => { + assert_eq!(peer, queried_peer); + assert_eq!(query_id, Some(QueryId(1336))); + assert!(std::matches!( + result, + QueryResult::ReadFailure { + reason: FailureReason::Timeout + } + )); + } + result => panic!("invalid result received: {result:?}"), + } + } + + #[tokio::test] + async fn read_message_substream_closed() { + let mut executor = QueryExecutor::new(); + let peer = PeerId::random(); + + // prepare substream which succeeds in sending the message but closes right after + let mut substream = MockSubstream::new(); + substream + .expect_poll_next() + .times(1) + .return_once(|_| Poll::Ready(Some(Err(crate::error::SubstreamError::ChannelClogged)))); + + executor.read_message( + peer, + Some(QueryId(1335)), + Substream::new_mock(peer, SubstreamId::from(0usize), Box::new(substream)), + ); + + match tokio::time::timeout(Duration::from_secs(20), executor.next()).await { + Ok(Some(QueryContext { + peer: queried_peer, + query_id, + result, + })) => { + assert_eq!(peer, queried_peer); + assert_eq!(query_id, Some(QueryId(1335))); + assert!(std::matches!( + result, + QueryResult::ReadFailure { + reason: FailureReason::SubstreamClosed + } + )); + } + result => panic!("invalid result received: {result:?}"), + } + } +} diff --git a/client/litep2p/src/protocol/libp2p/kademlia/handle.rs b/client/litep2p/src/protocol/libp2p/kademlia/handle.rs new file mode 100644 index 00000000..da02d845 --- /dev/null +++ b/client/litep2p/src/protocol/libp2p/kademlia/handle.rs @@ -0,0 +1,511 @@ +// Copyright 2023 litep2p developers +// +// Permission is hereby granted, free of charge, to any person obtaining a +// copy of this software and associated documentation files (the "Software"), +// to deal in the Software without restriction, including without limitation +// the rights to use, copy, modify, merge, publish, distribute, sublicense, +// and/or sell copies of the Software, and to permit persons to whom the +// Software is furnished to do so, subject to the following conditions: +// +// The above copyright notice and this permission notice shall be included in +// all copies or substantial portions of the Software. +// +// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS +// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE +// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER +// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING +// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER +// DEALINGS IN THE SOFTWARE. + +use crate::{ + protocol::libp2p::kademlia::{ContentProvider, PeerRecord, QueryId, Record, RecordKey}, + PeerId, +}; + +use futures::Stream; +use multiaddr::Multiaddr; +use tokio::sync::mpsc::{Receiver, Sender}; + +use std::{ + num::NonZeroUsize, + pin::Pin, + sync::{ + atomic::{AtomicUsize, Ordering}, + Arc, + }, + task::{Context, Poll}, +}; + +/// Quorum. +/// +/// Quorum defines how many peers must be successfully contacted +/// in order for the query to be considered successful. +#[derive(Debug, Copy, Clone, PartialEq, Eq)] +#[cfg_attr(feature = "fuzz", derive(serde::Serialize, serde::Deserialize))] +pub enum Quorum { + /// All peers must be successfully contacted. + All, + + /// One peer must be successfully contacted. + One, + + /// `N` peers must be successfully contacted. + N(NonZeroUsize), +} + +/// Routing table update mode. +#[derive(Debug, Copy, Clone)] +pub enum RoutingTableUpdateMode { + /// Don't insert discovered peers automatically to the routing tables but + /// allow user to do that by calling [`KademliaHandle::add_known_peer()`]. + Manual, + + /// Automatically add all discovered peers to routing tables. + Automatic, +} + +/// Incoming record validation mode. +#[derive(Debug, Copy, Clone)] +pub enum IncomingRecordValidationMode { + /// Don't insert incoming records automatically to the local DHT store + /// and let the user do that by calling [`KademliaHandle::store_record()`]. + Manual, + + /// Automatically accept all incoming records. + Automatic, +} + +/// Kademlia commands. +#[derive(Debug)] +#[cfg_attr(feature = "fuzz", derive(serde::Serialize, serde::Deserialize))] +pub enum KademliaCommand { + /// Add known peer. + AddKnownPeer { + /// Peer ID. + peer: PeerId, + + /// Addresses of peer. + addresses: Vec, + }, + + /// Send `FIND_NODE` message. + FindNode { + /// Peer ID. + peer: PeerId, + + /// Query ID for the query. + query_id: QueryId, + }, + + /// Store record to DHT. + PutRecord { + /// Record. + record: Record, + + /// [`Quorum`] for the query. + quorum: Quorum, + + /// Query ID for the query. + query_id: QueryId, + }, + + /// Store record to DHT to the given peers. + /// + /// Similar to [`KademliaCommand::PutRecord`] but allows user to specify the peers. + PutRecordToPeers { + /// Record. + record: Record, + + /// [`Quorum`] for the query. + quorum: Quorum, + + /// Query ID for the query. + query_id: QueryId, + + /// Use the following peers for the put request. + peers: Vec, + + /// Update local store. + update_local_store: bool, + }, + + /// Get record from DHT. + GetRecord { + /// Record key. + key: RecordKey, + + /// [`Quorum`] for the query. + quorum: Quorum, + + /// Query ID for the query. + query_id: QueryId, + }, + + /// Get providers from DHT. + GetProviders { + /// Provided key. + key: RecordKey, + + /// Query ID for the query. + query_id: QueryId, + }, + + /// Register as a content provider for `key`. + StartProviding { + /// Provided key. + key: RecordKey, + + /// [`Quorum`] for the query. + quorum: Quorum, + + /// Query ID for the query. + query_id: QueryId, + }, + + /// Stop providing the key locally and refreshing the provider. + StopProviding { + /// Provided key. + key: RecordKey, + }, + + /// Store record locally. + StoreRecord { + // Record. + record: Record, + }, +} + +/// Kademlia events. +#[derive(Debug, Clone)] +pub enum KademliaEvent { + /// Result for the issued `FIND_NODE` query. + FindNodeSuccess { + /// Query ID. + query_id: QueryId, + + /// Target of the query + target: PeerId, + + /// Found nodes and their addresses. + peers: Vec<(PeerId, Vec)>, + }, + + /// Routing table update. + /// + /// Kademlia has discovered one or more peers that should be added to the routing table. + /// If [`RoutingTableUpdateMode`] is `Automatic`, user can ignore this event unless some + /// upper-level protocols has user for this information. + /// + /// If the mode was set to `Manual`, user should call [`KademliaHandle::add_known_peer()`] + /// in order to add the peers to routing table. + RoutingTableUpdate { + /// Discovered peers. + peers: Vec, + }, + + /// `GET_VALUE` query succeeded. + GetRecordSuccess { + /// Query ID. + query_id: QueryId, + }, + + /// `GET_VALUE` inflight query produced a result. + /// + /// This event is emitted when a peer responds to the query with a record. + GetRecordPartialResult { + /// Query ID. + query_id: QueryId, + + /// Found record. + record: PeerRecord, + }, + + /// `GET_PROVIDERS` query succeeded. + GetProvidersSuccess { + /// Query ID. + query_id: QueryId, + + /// Provided key. + provided_key: RecordKey, + + /// Found providers with cached addresses. Returned providers are sorted by distane to the + /// provided key. + providers: Vec, + }, + + /// `PUT_VALUE` query succeeded. + PutRecordSuccess { + /// Query ID. + query_id: QueryId, + + /// Record key. + key: RecordKey, + }, + + /// `ADD_PROVIDER` query succeeded. + AddProviderSuccess { + /// Query ID. + query_id: QueryId, + + /// Provided key. + provided_key: RecordKey, + }, + + /// Query failed. + QueryFailed { + /// Query ID. + query_id: QueryId, + }, + + /// Incoming `PUT_VALUE` request received. + /// + /// In case of using [`IncomingRecordValidationMode::Manual`] and successful validation + /// the record must be manually inserted into the local DHT store with + /// [`KademliaHandle::store_record()`]. + IncomingRecord { + /// Record. + record: Record, + }, + + /// Incoming `ADD_PROVIDER` request received. + IncomingProvider { + /// Provided key. + provided_key: RecordKey, + + /// Provider. + provider: ContentProvider, + }, +} + +/// Handle for communicating with the Kademlia protocol. +pub struct KademliaHandle { + /// TX channel for sending commands to `Kademlia`. + cmd_tx: Sender, + + /// RX channel for receiving events from `Kademlia`. + event_rx: Receiver, + + /// Next query ID. + next_query_id: Arc, +} + +impl KademliaHandle { + /// Create new [`KademliaHandle`]. + pub(super) fn new( + cmd_tx: Sender, + event_rx: Receiver, + next_query_id: Arc, + ) -> Self { + Self { + cmd_tx, + event_rx, + next_query_id, + } + } + + /// Allocate next query ID. + fn next_query_id(&mut self) -> QueryId { + let query_id = self.next_query_id.fetch_add(1, Ordering::Relaxed); + + QueryId(query_id) + } + + /// Add known peer. + pub async fn add_known_peer(&self, peer: PeerId, addresses: Vec) { + let _ = self.cmd_tx.send(KademliaCommand::AddKnownPeer { peer, addresses }).await; + } + + /// Send `FIND_NODE` query to known peers. + pub async fn find_node(&mut self, peer: PeerId) -> QueryId { + let query_id = self.next_query_id(); + let _ = self.cmd_tx.send(KademliaCommand::FindNode { peer, query_id }).await; + + query_id + } + + /// Store record to DHT. + pub async fn put_record(&mut self, record: Record, quorum: Quorum) -> QueryId { + let query_id = self.next_query_id(); + let _ = self + .cmd_tx + .send(KademliaCommand::PutRecord { + record, + quorum, + query_id, + }) + .await; + + query_id + } + + /// Store record to DHT to the given peers. + /// + /// Returns [`Err`] only if `Kademlia` is terminating. + pub async fn put_record_to_peers( + &mut self, + record: Record, + peers: Vec, + update_local_store: bool, + quorum: Quorum, + ) -> QueryId { + let query_id = self.next_query_id(); + let _ = self + .cmd_tx + .send(KademliaCommand::PutRecordToPeers { + record, + query_id, + peers, + update_local_store, + quorum, + }) + .await; + + query_id + } + + /// Get record from DHT. + /// + /// Returns [`Err`] only if `Kademlia` is terminating. + pub async fn get_record(&mut self, key: RecordKey, quorum: Quorum) -> QueryId { + let query_id = self.next_query_id(); + let _ = self + .cmd_tx + .send(KademliaCommand::GetRecord { + key, + quorum, + query_id, + }) + .await; + + query_id + } + + /// Register as a content provider on the DHT. + /// + /// Register the local peer ID & its `public_addresses` as a provider for a given `key`. + /// Returns [`Err`] only if `Kademlia` is terminating. + pub async fn start_providing(&mut self, key: RecordKey, quorum: Quorum) -> QueryId { + let query_id = self.next_query_id(); + let _ = self + .cmd_tx + .send(KademliaCommand::StartProviding { + key, + quorum, + query_id, + }) + .await; + + query_id + } + + /// Stop providing the key on the DHT. + /// + /// This will stop republishing the provider, but won't + /// remove it instantly from the nodes. It will be removed from them after the provider TTL + /// expires, set by default to 48 hours. + pub async fn stop_providing(&mut self, key: RecordKey) { + let _ = self.cmd_tx.send(KademliaCommand::StopProviding { key }).await; + } + + /// Get providers from DHT. + /// + /// Returns [`Err`] only if `Kademlia` is terminating. + pub async fn get_providers(&mut self, key: RecordKey) -> QueryId { + let query_id = self.next_query_id(); + let _ = self.cmd_tx.send(KademliaCommand::GetProviders { key, query_id }).await; + + query_id + } + + /// Store the record in the local store. Used in combination with + /// [`IncomingRecordValidationMode::Manual`]. + pub async fn store_record(&mut self, record: Record) { + let _ = self.cmd_tx.send(KademliaCommand::StoreRecord { record }).await; + } + + /// Try to add known peer and if the channel is clogged, return an error. + pub fn try_add_known_peer(&self, peer: PeerId, addresses: Vec) -> Result<(), ()> { + self.cmd_tx + .try_send(KademliaCommand::AddKnownPeer { peer, addresses }) + .map_err(|_| ()) + } + + /// Try to initiate `FIND_NODE` query and if the channel is clogged, return an error. + pub fn try_find_node(&mut self, peer: PeerId) -> Result { + let query_id = self.next_query_id(); + self.cmd_tx + .try_send(KademliaCommand::FindNode { peer, query_id }) + .map(|_| query_id) + .map_err(|_| ()) + } + + /// Try to initiate `PUT_VALUE` query and if the channel is clogged, return an error. + pub fn try_put_record(&mut self, record: Record, quorum: Quorum) -> Result { + let query_id = self.next_query_id(); + self.cmd_tx + .try_send(KademliaCommand::PutRecord { + record, + query_id, + quorum, + }) + .map(|_| query_id) + .map_err(|_| ()) + } + + /// Try to initiate `PUT_VALUE` query to the given peers and if the channel is clogged, + /// return an error. + pub fn try_put_record_to_peers( + &mut self, + record: Record, + peers: Vec, + update_local_store: bool, + quorum: Quorum, + ) -> Result { + let query_id = self.next_query_id(); + self.cmd_tx + .try_send(KademliaCommand::PutRecordToPeers { + record, + query_id, + peers, + update_local_store, + quorum, + }) + .map(|_| query_id) + .map_err(|_| ()) + } + + /// Try to initiate `GET_VALUE` query and if the channel is clogged, return an error. + pub fn try_get_record(&mut self, key: RecordKey, quorum: Quorum) -> Result { + let query_id = self.next_query_id(); + self.cmd_tx + .try_send(KademliaCommand::GetRecord { + key, + quorum, + query_id, + }) + .map(|_| query_id) + .map_err(|_| ()) + } + + /// Try to store the record in the local store, and if the channel is clogged, return an error. + /// Used in combination with [`IncomingRecordValidationMode::Manual`]. + pub fn try_store_record(&mut self, record: Record) -> Result<(), ()> { + self.cmd_tx.try_send(KademliaCommand::StoreRecord { record }).map_err(|_| ()) + } + + #[cfg(feature = "fuzz")] + /// Expose functionality for fuzzing + pub async fn fuzz_send_message(&mut self, command: KademliaCommand) -> crate::Result<()> { + let _ = self.cmd_tx.send(command).await; + Ok(()) + } +} + +impl Stream for KademliaHandle { + type Item = KademliaEvent; + + fn poll_next(mut self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll> { + self.event_rx.poll_recv(cx) + } +} diff --git a/client/litep2p/src/protocol/libp2p/kademlia/message.rs b/client/litep2p/src/protocol/libp2p/kademlia/message.rs new file mode 100644 index 00000000..ad1b4d54 --- /dev/null +++ b/client/litep2p/src/protocol/libp2p/kademlia/message.rs @@ -0,0 +1,439 @@ +// Copyright 2023 litep2p developers +// +// Permission is hereby granted, free of charge, to any person obtaining a +// copy of this software and associated documentation files (the "Software"), +// to deal in the Software without restriction, including without limitation +// the rights to use, copy, modify, merge, publish, distribute, sublicense, +// and/or sell copies of the Software, and to permit persons to whom the +// Software is furnished to do so, subject to the following conditions: +// +// The above copyright notice and this permission notice shall be included in +// all copies or substantial portions of the Software. +// +// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS +// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE +// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER +// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING +// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER +// DEALINGS IN THE SOFTWARE. + +use crate::{ + protocol::libp2p::kademlia::{ + record::{ContentProvider, Key as RecordKey, Record}, + schema, + types::{ConnectionType, KademliaPeer}, + }, + PeerId, +}; + +use bytes::{Bytes, BytesMut}; +use enum_display::EnumDisplay; +use prost::Message; +use std::time::{Duration, Instant}; + +/// Logging target for the file. +const LOG_TARGET: &str = "litep2p::ipfs::kademlia::message"; + +/// Kademlia message. +#[derive(Debug, Clone, EnumDisplay)] +pub enum KademliaMessage { + /// `FIND_NODE` message. + FindNode { + /// Query target. + target: Vec, + + /// Found peers. + peers: Vec, + }, + + /// Kademlia `PUT_VALUE` message. + PutValue { + /// Record. + record: Record, + }, + + /// `GET_VALUE` message. + GetRecord { + /// Key. + key: Option, + + /// Record. + record: Option, + + /// Peers closer to the key. + peers: Vec, + }, + + /// `ADD_PROVIDER` message. + AddProvider { + /// Key. + key: RecordKey, + + /// Peers, providing the data for `key`. Must contain exactly one peer matching the sender + /// of the message. + providers: Vec, + }, + + /// `GET_PROVIDERS` message. + GetProviders { + /// Key. `None` in response. + key: Option, + + /// Peers closer to the key. + peers: Vec, + + /// Peers, providing the data for `key`. + providers: Vec, + }, +} + +impl KademliaMessage { + /// Create `FIND_NODE` message for `peer`. + pub fn find_node>>(key: T) -> Bytes { + let message = schema::kademlia::Message { + key: key.into(), + r#type: schema::kademlia::MessageType::FindNode.into(), + cluster_level_raw: 10, + ..Default::default() + }; + + let mut buf = BytesMut::with_capacity(message.encoded_len()); + message.encode(&mut buf).expect("Vec to provide needed capacity"); + + buf.freeze() + } + + /// Create `PUT_VALUE` message for `record`. + pub fn put_value(record: Record) -> Bytes { + let message = schema::kademlia::Message { + key: record.key.clone().into(), + r#type: schema::kademlia::MessageType::PutValue.into(), + record: Some(record_to_schema(record)), + cluster_level_raw: 10, + ..Default::default() + }; + + let mut buf = BytesMut::with_capacity(message.encoded_len()); + message.encode(&mut buf).expect("BytesMut to provide needed capacity"); + + buf.freeze() + } + + /// Create `GET_VALUE` message for `record`. + pub fn get_record(key: RecordKey) -> Bytes { + let message = schema::kademlia::Message { + key: key.clone().into(), + r#type: schema::kademlia::MessageType::GetValue.into(), + cluster_level_raw: 10, + ..Default::default() + }; + + let mut buf = BytesMut::with_capacity(message.encoded_len()); + message.encode(&mut buf).expect("BytesMut to provide needed capacity"); + + buf.freeze() + } + + /// Create `FIND_NODE` response. + pub fn find_node_response>(key: K, peers: Vec) -> Vec { + let message = schema::kademlia::Message { + key: key.as_ref().to_vec(), + cluster_level_raw: 10, + r#type: schema::kademlia::MessageType::FindNode.into(), + closer_peers: peers.iter().map(|peer| peer.into()).collect(), + ..Default::default() + }; + + let mut buf = Vec::with_capacity(message.encoded_len()); + message.encode(&mut buf).expect("Vec to provide needed capacity"); + + buf + } + + /// Create `PUT_VALUE` response. + pub fn put_value_response(key: RecordKey, value: Vec) -> Bytes { + let message = schema::kademlia::Message { + key: key.to_vec(), + cluster_level_raw: 10, + r#type: schema::kademlia::MessageType::PutValue.into(), + record: Some(schema::kademlia::Record { + key: key.to_vec(), + value, + ..Default::default() + }), + ..Default::default() + }; + + let mut buf = BytesMut::with_capacity(message.encoded_len()); + message.encode(&mut buf).expect("BytesMut to provide needed capacity"); + + buf.freeze() + } + + /// Create `GET_VALUE` response. + pub fn get_value_response( + key: RecordKey, + peers: Vec, + record: Option, + ) -> Vec { + let message = schema::kademlia::Message { + key: key.to_vec(), + cluster_level_raw: 10, + r#type: schema::kademlia::MessageType::GetValue.into(), + closer_peers: peers.iter().map(|peer| peer.into()).collect(), + record: record.map(record_to_schema), + ..Default::default() + }; + + let mut buf = Vec::with_capacity(message.encoded_len()); + message.encode(&mut buf).expect("Vec to provide needed capacity"); + + buf + } + + /// Create `ADD_PROVIDER` message with `provider`. + pub fn add_provider(provided_key: RecordKey, provider: ContentProvider) -> Bytes { + let peer = KademliaPeer::new( + provider.peer, + provider.addresses, + ConnectionType::CanConnect, // ignored by message recipient + ); + let message = schema::kademlia::Message { + key: provided_key.clone().to_vec(), + cluster_level_raw: 10, + r#type: schema::kademlia::MessageType::AddProvider.into(), + provider_peers: std::iter::once((&peer).into()).collect(), + ..Default::default() + }; + + let mut buf = BytesMut::with_capacity(message.encoded_len()); + message.encode(&mut buf).expect("BytesMut to provide needed capacity"); + + buf.freeze() + } + + /// Create `GET_PROVIDERS` request for `key`. + pub fn get_providers_request(key: RecordKey) -> Bytes { + let message = schema::kademlia::Message { + key: key.to_vec(), + cluster_level_raw: 10, + r#type: schema::kademlia::MessageType::GetProviders.into(), + ..Default::default() + }; + + let mut buf = BytesMut::with_capacity(message.encoded_len()); + message.encode(&mut buf).expect("BytesMut to provide needed capacity"); + + buf.freeze() + } + + /// Create `GET_PROVIDERS` response. + pub fn get_providers_response( + providers: Vec, + closer_peers: &[KademliaPeer], + ) -> Vec { + let provider_peers = providers + .into_iter() + .map(|p| { + KademliaPeer::new( + p.peer, + p.addresses, + // `ConnectionType` is ignored by a recipient + ConnectionType::NotConnected, + ) + }) + .map(|p| (&p).into()) + .collect(); + + let message = schema::kademlia::Message { + cluster_level_raw: 10, + r#type: schema::kademlia::MessageType::GetProviders.into(), + closer_peers: closer_peers.iter().map(Into::into).collect(), + provider_peers, + ..Default::default() + }; + + let mut buf = Vec::with_capacity(message.encoded_len()); + message.encode(&mut buf).expect("Vec to provide needed capacity"); + + buf + } + + /// Get [`KademliaMessage`] from bytes. + pub fn from_bytes(bytes: BytesMut, replication_factor: usize) -> Option { + match schema::kademlia::Message::decode(bytes) { + Ok(message) => match message.r#type { + // FIND_NODE + 4 => { + let peers = message + .closer_peers + .iter() + .filter_map(|peer| KademliaPeer::try_from(peer).ok()) + .take(replication_factor) + .collect(); + + Some(Self::FindNode { + target: message.key, + peers, + }) + } + // PUT_VALUE + 0 => { + let record = message.record?; + + Some(Self::PutValue { + record: record_from_schema(record)?, + }) + } + // GET_VALUE + 1 => { + let key = match message.key.is_empty() { + true => message.record.as_ref().and_then(|record| { + (!record.key.is_empty()).then_some(RecordKey::from(record.key.clone())) + }), + false => Some(RecordKey::from(message.key.clone())), + }; + + let record = if let Some(record) = message.record { + Some(record_from_schema(record)?) + } else { + None + }; + + Some(Self::GetRecord { + key, + record, + peers: message + .closer_peers + .iter() + .filter_map(|peer| KademliaPeer::try_from(peer).ok()) + .take(replication_factor) + .collect(), + }) + } + // ADD_PROVIDER + 2 => { + let key = (!message.key.is_empty()).then_some(message.key.into())?; + let providers = message + .provider_peers + .iter() + .filter_map(|peer| KademliaPeer::try_from(peer).ok()) + .take(replication_factor) + .collect(); + + Some(Self::AddProvider { key, providers }) + } + // GET_PROVIDERS + 3 => { + let key = (!message.key.is_empty()).then_some(message.key.into()); + let peers = message + .closer_peers + .iter() + .filter_map(|peer| KademliaPeer::try_from(peer).ok()) + .take(replication_factor) + .collect(); + let providers = message + .provider_peers + .iter() + .filter_map(|peer| KademliaPeer::try_from(peer).ok()) + .take(replication_factor) + .collect(); + + Some(Self::GetProviders { + key, + peers, + providers, + }) + } + message_type => { + tracing::warn!(target: LOG_TARGET, ?message_type, "unhandled message"); + None + } + }, + Err(error) => { + tracing::debug!(target: LOG_TARGET, ?error, "failed to decode message"); + None + } + } + } +} + +fn record_to_schema(record: Record) -> schema::kademlia::Record { + schema::kademlia::Record { + key: record.key.into(), + value: record.value, + time_received: String::new(), + publisher: record.publisher.map(|peer_id| peer_id.to_bytes()).unwrap_or_default(), + ttl: record + .expires + .map(|expires| { + let now = Instant::now(); + if expires > now { + u32::try_from((expires - now).as_secs()).unwrap_or(u32::MAX) + } else { + 1 // because 0 means "does not expire" + } + }) + .unwrap_or(0), + } +} + +fn record_from_schema(record: schema::kademlia::Record) -> Option { + Some(Record { + key: record.key.into(), + value: record.value, + publisher: if !record.publisher.is_empty() { + Some(PeerId::from_bytes(&record.publisher).ok()?) + } else { + None + }, + expires: if record.ttl > 0 { + Some(Instant::now() + Duration::from_secs(record.ttl as u64)) + } else { + None + }, + }) +} + +#[cfg(test)] +mod tests { + use super::*; + + #[test] + fn non_empty_publisher_and_ttl_are_preserved() { + let expires = Instant::now() + Duration::from_secs(3600); + + let record = Record { + key: vec![1, 2, 3].into(), + value: vec![17], + publisher: Some(PeerId::random()), + expires: Some(expires), + }; + + let got_record = record_from_schema(record_to_schema(record.clone())).unwrap(); + + assert_eq!(got_record.key, record.key); + assert_eq!(got_record.value, record.value); + assert_eq!(got_record.publisher, record.publisher); + + // Check that the expiration time is sane. + let got_expires = got_record.expires.unwrap(); + assert!(got_expires - expires >= Duration::ZERO); + assert!(got_expires - expires < Duration::from_secs(10)); + } + + #[test] + fn empty_publisher_and_ttl_are_preserved() { + let record = Record { + key: vec![1, 2, 3].into(), + value: vec![17], + publisher: None, + expires: None, + }; + + let got_record = record_from_schema(record_to_schema(record.clone())).unwrap(); + + assert_eq!(got_record, record); + } +} diff --git a/client/litep2p/src/protocol/libp2p/kademlia/mod.rs b/client/litep2p/src/protocol/libp2p/kademlia/mod.rs new file mode 100644 index 00000000..e476d44c --- /dev/null +++ b/client/litep2p/src/protocol/libp2p/kademlia/mod.rs @@ -0,0 +1,1648 @@ +// Copyright 2023 litep2p developers +// +// Permission is hereby granted, free of charge, to any person obtaining a +// copy of this software and associated documentation files (the "Software"), +// to deal in the Software without restriction, including without limitation +// the rights to use, copy, modify, merge, publish, distribute, sublicense, +// and/or sell copies of the Software, and to permit persons to whom the +// Software is furnished to do so, subject to the following conditions: +// +// The above copyright notice and this permission notice shall be included in +// all copies or substantial portions of the Software. +// +// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS +// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE +// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER +// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING +// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER +// DEALINGS IN THE SOFTWARE. + +//! [`/ipfs/kad/1.0.0`](https://github.com/libp2p/specs/blob/master/kad-dht/README.md) implementation. + +use crate::{ + error::{Error, ImmediateDialError, SubstreamError}, + protocol::{ + libp2p::kademlia::{ + bucket::KBucketEntry, + executor::{QueryContext, QueryExecutor, QueryResult}, + message::KademliaMessage, + query::{QueryAction, QueryEngine}, + routing_table::RoutingTable, + store::{MemoryStore, MemoryStoreAction}, + types::{ConnectionType, KademliaPeer, Key}, + }, + Direction, TransportEvent, TransportService, + }, + substream::Substream, + transport::Endpoint, + types::SubstreamId, + PeerId, +}; + +use bytes::{Bytes, BytesMut}; +use futures::StreamExt; +use multiaddr::Multiaddr; +use tokio::sync::mpsc::{Receiver, Sender}; + +use std::{ + collections::{hash_map::Entry, HashMap}, + sync::{ + atomic::{AtomicUsize, Ordering}, + Arc, + }, + time::{Duration, Instant}, +}; + +pub use config::{Config, ConfigBuilder}; +pub use handle::{ + IncomingRecordValidationMode, KademliaCommand, KademliaEvent, KademliaHandle, Quorum, + RoutingTableUpdateMode, +}; +pub use query::QueryId; +pub use record::{ContentProvider, Key as RecordKey, PeerRecord, Record}; + +/// Logging target for the file. +const LOG_TARGET: &str = "litep2p::ipfs::kademlia"; + +/// Parallelism factor, `α`. +const PARALLELISM_FACTOR: usize = 3; + +mod bucket; +mod config; +mod executor; +mod handle; +mod message; +mod query; +mod record; +mod routing_table; +mod store; +mod types; + +mod schema { + pub(super) mod kademlia { + include!(concat!(env!("OUT_DIR"), "/kademlia.rs")); + } +} + +/// Peer action. +#[derive(Debug, Clone)] +#[allow(clippy::enum_variant_names)] +enum PeerAction { + /// Find nodes (and values/providers) as part of `FIND_NODE`/`GET_VALUE`/`GET_PROVIDERS` query. + // TODO: may be a better naming would be `SendFindRequest`? + SendFindNode(QueryId), + + /// Send `PUT_VALUE` message to peer. + SendPutValue(QueryId, Bytes), + + /// Send `ADD_PROVIDER` message to peer. + SendAddProvider(QueryId, Bytes), +} + +impl PeerAction { + fn query_id(&self) -> QueryId { + match self { + PeerAction::SendFindNode(query_id) => *query_id, + PeerAction::SendPutValue(query_id, _) => *query_id, + PeerAction::SendAddProvider(query_id, _) => *query_id, + } + } +} + +/// Peer context. +#[derive(Default)] +struct PeerContext { + /// Pending action, if any. + pending_actions: HashMap, +} + +impl PeerContext { + /// Create new [`PeerContext`]. + pub fn new() -> Self { + Self { + pending_actions: HashMap::new(), + } + } + + /// Add pending action for peer. + pub fn add_pending_action(&mut self, substream_id: SubstreamId, action: PeerAction) { + self.pending_actions.insert(substream_id, action); + } +} + +/// Main Kademlia object. +pub(crate) struct Kademlia { + /// Transport service. + service: TransportService, + + /// Local Kademlia key. + local_key: Key, + + /// Connected peers, + peers: HashMap, + + /// TX channel for sending events to `KademliaHandle`. + event_tx: Sender, + + /// RX channel for receiving commands from `KademliaHandle`. + cmd_rx: Receiver, + + /// Next query ID. + next_query_id: Arc, + + /// Routing table. + routing_table: RoutingTable, + + /// Replication factor. + replication_factor: usize, + + /// Record store. + store: MemoryStore, + + /// Pending outbound substreams. + pending_substreams: HashMap, + + /// Pending dials. + pending_dials: HashMap>, + + /// Routing table update mode. + update_mode: RoutingTableUpdateMode, + + /// Incoming records validation mode. + validation_mode: IncomingRecordValidationMode, + + /// Default record TTL. + record_ttl: Duration, + + /// Query engine. + engine: QueryEngine, + + /// Query executor. + executor: QueryExecutor, +} + +impl Kademlia { + /// Create new [`Kademlia`]. + pub(crate) fn new(mut service: TransportService, config: Config) -> Self { + let local_peer_id = service.local_peer_id(); + let local_key = Key::from(service.local_peer_id()); + let mut routing_table = RoutingTable::new(local_key.clone()); + + for (peer, addresses) in config.known_peers { + tracing::trace!(target: LOG_TARGET, ?peer, ?addresses, "add bootstrap peer"); + + routing_table.add_known_peer(peer, addresses.clone(), ConnectionType::NotConnected); + service.add_known_address(&peer, addresses.into_iter()); + } + + let store = MemoryStore::with_config(local_peer_id, config.memory_store_config); + + Self { + service, + routing_table, + peers: HashMap::new(), + cmd_rx: config.cmd_rx, + next_query_id: config.next_query_id, + store, + event_tx: config.event_tx, + local_key, + pending_dials: HashMap::new(), + executor: QueryExecutor::new(), + pending_substreams: HashMap::new(), + update_mode: config.update_mode, + validation_mode: config.validation_mode, + record_ttl: config.record_ttl, + replication_factor: config.replication_factor, + engine: QueryEngine::new(local_peer_id, config.replication_factor, PARALLELISM_FACTOR), + } + } + + /// Allocate next query ID. + fn next_query_id(&mut self) -> QueryId { + let query_id = self.next_query_id.fetch_add(1, Ordering::Relaxed); + + QueryId(query_id) + } + + /// Connection established to remote peer. + fn on_connection_established(&mut self, peer: PeerId, endpoint: Endpoint) -> crate::Result<()> { + tracing::trace!(target: LOG_TARGET, ?peer, "connection established"); + + match self.peers.entry(peer) { + Entry::Vacant(entry) => { + // Set the conenction type to connected and potentially save the address in the + // table. + // + // Note: this happens regardless of the state of the kademlia managed peers, because + // an already occupied entry in the `self.peers` map does not mean that we are + // no longer interested in the address / connection type of the peer. + self.routing_table.on_connection_established(Key::from(peer), endpoint); + + let Some(actions) = self.pending_dials.remove(&peer) else { + // Note that we do not add peer entry if we don't have any pending actions. + // This is done to not populate `self.peers` with peers that don't support + // our Kademlia protocol. + return Ok(()); + }; + + // go over all pending actions, open substreams and save the state to `PeerContext` + // from which it will be later queried when the substream opens + let mut context = PeerContext::new(); + + for action in actions { + match self.service.open_substream(peer) { + Ok(substream_id) => { + context.add_pending_action(substream_id, action); + } + Err(error) => { + tracing::debug!( + target: LOG_TARGET, + ?peer, + ?action, + ?error, + "connection established to peer but failed to open substream", + ); + + if let PeerAction::SendFindNode(query_id) = action { + self.engine.register_send_failure(query_id, peer); + self.engine.register_response_failure(query_id, peer); + } + } + } + } + + entry.insert(context); + Ok(()) + } + Entry::Occupied(_) => { + tracing::warn!( + target: LOG_TARGET, + ?peer, + ?endpoint, + "connection already exists, discarding opening substreams, this is unexpected" + ); + + // Update the connection in the routing table, similar as above. The function call + // happens in two places to avoid unnecessary cloning of the endpoint for logging + // purposes. + self.routing_table.on_connection_established(Key::from(peer), endpoint); + + Err(Error::PeerAlreadyExists(peer)) + } + } + } + + /// Disconnect peer from `Kademlia`. + /// + /// Peer is disconnected either because the substream was detected closed + /// or because the connection was closed. + /// + /// The peer is kept in the routing table but its connection state is set + /// as `NotConnected`, meaning it can be evicted from a k-bucket if another + /// peer that shares the bucket connects. + async fn disconnect_peer(&mut self, peer: PeerId, query: Option) { + tracing::trace!(target: LOG_TARGET, ?peer, ?query, "disconnect peer"); + + if let Some(query) = query { + self.engine.register_peer_failure(query, peer); + } + + // Apart from the failing query, we need to fail all other pending queries for the peer + // being disconnected. + if let Some(PeerContext { pending_actions }) = self.peers.remove(&peer) { + pending_actions.into_iter().for_each(|(_, action)| { + // Don't report failure twice for the same `query_id` if it was already reported + // above. (We can still have other pending queries for the peer that + // need to be reported.) + let query_id = action.query_id(); + if Some(query_id) != query { + self.engine.register_peer_failure(query_id, peer); + } + }); + } + + if let KBucketEntry::Occupied(entry) = self.routing_table.entry(Key::from(peer)) { + entry.connection = ConnectionType::NotConnected; + } + } + + /// Local node opened a substream to remote node. + async fn on_outbound_substream( + &mut self, + peer: PeerId, + substream_id: SubstreamId, + substream: Substream, + ) -> crate::Result<()> { + tracing::trace!( + target: LOG_TARGET, + ?peer, + ?substream_id, + "outbound substream opened", + ); + let _ = self.pending_substreams.remove(&substream_id); + + let pending_action = &mut self + .peers + .get_mut(&peer) + // If we opened an outbound substream, we must have pending actions for the peer. + .ok_or(Error::PeerDoesntExist(peer))? + .pending_actions + .remove(&substream_id); + + match pending_action.take() { + None => { + tracing::trace!( + target: LOG_TARGET, + ?peer, + ?substream_id, + "pending action doesn't exist for peer, closing substream", + ); + + let _ = substream.close().await; + return Ok(()); + } + Some(PeerAction::SendFindNode(query)) => { + match self.engine.next_peer_action(&query, &peer) { + Some(QueryAction::SendMessage { + query, + peer, + message, + }) => { + tracing::trace!(target: LOG_TARGET, ?peer, ?query, "start sending message to peer"); + + self.executor.send_request_read_response( + peer, + Some(query), + message, + substream, + ); + } + // query finished while the substream was being opened + None => { + let _ = substream.close().await; + } + action => { + tracing::warn!(target: LOG_TARGET, ?query, ?peer, ?action, "unexpected action for `FIND_NODE`"); + let _ = substream.close().await; + debug_assert!(false); + } + } + } + Some(PeerAction::SendPutValue(query, message)) => { + tracing::trace!(target: LOG_TARGET, ?peer, "send `PUT_VALUE` message"); + + self.executor.send_request_eat_response_failure( + peer, + Some(query), + message, + substream, + ); + // TODO: replace this with `send_request_read_response` as part of + // https://github.com/paritytech/litep2p/issues/429. + } + Some(PeerAction::SendAddProvider(query, message)) => { + tracing::trace!(target: LOG_TARGET, ?peer, "send `ADD_PROVIDER` message"); + + self.executor.send_message(peer, Some(query), message, substream); + } + } + + Ok(()) + } + + /// Remote opened a substream to local node. + async fn on_inbound_substream(&mut self, peer: PeerId, substream: Substream) { + tracing::trace!(target: LOG_TARGET, ?peer, "inbound substream opened"); + + // Ensure peer entry exists to treat peer as [`ConnectionType::Connected`]. + // when inserting into the routing table. + self.peers.entry(peer).or_default(); + + self.executor.read_message(peer, None, substream); + } + + /// Update routing table if the routing table update mode was set to automatic. + /// + /// Inform user about the potential routing table, allowing them to update it manually if + /// the mode was set to manual. + async fn update_routing_table(&mut self, peers: &[KademliaPeer]) { + let peers: Vec<_> = + peers.iter().filter(|peer| peer.peer != self.service.local_peer_id()).collect(); + + // inform user about the routing table update, regardless of what the routing table update + // mode is + let _ = self + .event_tx + .send(KademliaEvent::RoutingTableUpdate { + peers: peers.iter().map(|peer| peer.peer).collect::>(), + }) + .await; + + for info in peers { + let addresses = info.addresses(); + self.service.add_known_address(&info.peer, addresses.clone().into_iter()); + + if std::matches!(self.update_mode, RoutingTableUpdateMode::Automatic) { + self.routing_table.add_known_peer( + info.peer, + addresses, + self.peers + .get(&info.peer) + .map_or(ConnectionType::NotConnected, |_| ConnectionType::Connected), + ); + } + } + } + + /// Handle received message. + async fn on_message_received( + &mut self, + peer: PeerId, + query_id: Option, + message: BytesMut, + substream: Substream, + ) -> crate::Result<()> { + tracing::trace!(target: LOG_TARGET, ?peer, query = ?query_id, "handle message from peer"); + + match KademliaMessage::from_bytes(message, self.replication_factor) + .ok_or(Error::InvalidData)? + { + KademliaMessage::FindNode { target, peers } => { + match query_id { + Some(query_id) => { + tracing::trace!( + target: LOG_TARGET, + ?peer, + ?target, + query = ?query_id, + "handle `FIND_NODE` response", + ); + + // update routing table and inform user about the update + self.update_routing_table(&peers).await; + self.engine.register_response( + query_id, + peer, + KademliaMessage::FindNode { target, peers }, + ); + substream.close().await; + } + None => { + tracing::trace!( + target: LOG_TARGET, + ?peer, + ?target, + "handle `FIND_NODE` request", + ); + + let message = KademliaMessage::find_node_response( + &target, + self.routing_table + .closest(&Key::new(target.as_ref()), self.replication_factor), + ); + self.executor.send_message(peer, None, message.into(), substream); + } + } + } + KademliaMessage::PutValue { record } => match query_id { + Some(query_id) => { + tracing::trace!( + target: LOG_TARGET, + ?peer, + query = ?query_id, + record_key = ?record.key, + "handle `PUT_VALUE` response", + ); + + self.engine.register_response( + query_id, + peer, + KademliaMessage::PutValue { record }, + ); + substream.close().await; + } + None => { + tracing::trace!( + target: LOG_TARGET, + ?peer, + record_key = ?record.key, + "handle `PUT_VALUE` request", + ); + + if let IncomingRecordValidationMode::Automatic = self.validation_mode { + self.store.put(record.clone()); + } + + // Send ACK even if the record was/will be filtered out to not reveal any + // internal state. + let message = KademliaMessage::put_value_response( + record.key.clone(), + record.value.clone(), + ); + self.executor.send_message_eat_failure(peer, None, message, substream); + // TODO: replace this with `send_message` as part of + // https://github.com/paritytech/litep2p/issues/429. + + let _ = self.event_tx.send(KademliaEvent::IncomingRecord { record }).await; + } + }, + KademliaMessage::GetRecord { key, record, peers } => { + match (query_id, key) { + (Some(query_id), key) => { + tracing::trace!( + target: LOG_TARGET, + ?peer, + query = ?query_id, + ?peers, + ?record, + "handle `GET_VALUE` response", + ); + + // update routing table and inform user about the update + self.update_routing_table(&peers).await; + + self.engine.register_response( + query_id, + peer, + KademliaMessage::GetRecord { key, record, peers }, + ); + + substream.close().await; + } + (None, Some(key)) => { + tracing::trace!( + target: LOG_TARGET, + ?peer, + ?key, + "handle `GET_VALUE` request", + ); + + let value = self.store.get(&key).cloned(); + let closest_peers = self + .routing_table + .closest(&Key::new(key.as_ref()), self.replication_factor); + + let message = + KademliaMessage::get_value_response(key, closest_peers, value); + self.executor.send_message(peer, None, message.into(), substream); + } + (None, None) => tracing::debug!( + target: LOG_TARGET, + ?peer, + ?record, + ?peers, + "unable to handle `GET_RECORD` request with empty key", + ), + } + } + KademliaMessage::AddProvider { key, mut providers } => { + tracing::trace!( + target: LOG_TARGET, + ?peer, + ?key, + ?providers, + "handle `ADD_PROVIDER` message", + ); + + match (providers.len(), providers.pop()) { + (1, Some(provider)) => { + let addresses = provider.addresses(); + + if provider.peer == peer { + self.store.put_provider( + key.clone(), + ContentProvider { + peer, + addresses: addresses.clone(), + }, + ); + + let _ = self + .event_tx + .send(KademliaEvent::IncomingProvider { + provided_key: key, + provider: ContentProvider { + peer: provider.peer, + addresses, + }, + }) + .await; + } else { + tracing::trace!( + target: LOG_TARGET, + publisher = ?peer, + provider = ?provider.peer, + "ignoring `ADD_PROVIDER` message with `publisher` != `provider`" + ) + } + } + (n, _) => { + tracing::trace!( + target: LOG_TARGET, + publisher = ?peer, + ?n, + "ignoring `ADD_PROVIDER` message with `n` != 1 providers" + ) + } + } + } + KademliaMessage::GetProviders { + key, + peers, + providers, + } => { + match (query_id, key) { + (Some(query_id), key) => { + // Note: key is not required, but can be non-empty. We just ignore it here. + tracing::trace!( + target: LOG_TARGET, + ?peer, + query = ?query_id, + ?key, + ?peers, + ?providers, + "handle `GET_PROVIDERS` response", + ); + + // update routing table and inform user about the update + self.update_routing_table(&peers).await; + + self.engine.register_response( + query_id, + peer, + KademliaMessage::GetProviders { + key, + peers, + providers, + }, + ); + + substream.close().await; + } + (None, Some(key)) => { + tracing::trace!( + target: LOG_TARGET, + ?peer, + ?key, + "handle `GET_PROVIDERS` request", + ); + + let mut providers = self.store.get_providers(&key); + + // Make sure local provider addresses are up to date. + let local_peer_id = self.local_key.clone().into_preimage(); + if let Some(p) = + providers.iter_mut().find(|p| p.peer == local_peer_id).as_mut() + { + p.addresses = self.service.public_addresses().get_addresses(); + } + + let closer_peers = self + .routing_table + .closest(&Key::new(key.as_ref()), self.replication_factor); + + let message = + KademliaMessage::get_providers_response(providers, &closer_peers); + self.executor.send_message(peer, None, message.into(), substream); + } + (None, None) => tracing::debug!( + target: LOG_TARGET, + ?peer, + ?peers, + ?providers, + "unable to handle `GET_PROVIDERS` request with empty key", + ), + } + } + } + + Ok(()) + } + + /// Failed to open substream to remote peer. + async fn on_substream_open_failure( + &mut self, + substream_id: SubstreamId, + error: SubstreamError, + ) { + tracing::trace!( + target: LOG_TARGET, + ?substream_id, + ?error, + "failed to open substream" + ); + + let Some(peer) = self.pending_substreams.remove(&substream_id) else { + tracing::debug!( + target: LOG_TARGET, + ?substream_id, + "outbound substream failed for non-existent peer" + ); + return; + }; + + if let Some(context) = self.peers.get_mut(&peer) { + let query = + context.pending_actions.remove(&substream_id).as_ref().map(PeerAction::query_id); + + self.disconnect_peer(peer, query).await; + } + } + + /// Handle dial failure. + fn on_dial_failure(&mut self, peer: PeerId, addresses: Vec) { + tracing::trace!(target: LOG_TARGET, ?peer, ?addresses, "failed to dial peer"); + + self.routing_table.on_dial_failure(Key::from(peer), &addresses); + + let Some(actions) = self.pending_dials.remove(&peer) else { + return; + }; + + for action in actions { + let query = action.query_id(); + + tracing::trace!( + target: LOG_TARGET, + ?peer, + ?query, + ?addresses, + "report failure for pending query", + ); + + // Fail both sending and receiving due to dial failure. + self.engine.register_send_failure(query, peer); + self.engine.register_response_failure(query, peer); + } + } + + /// Open a substream with a peer or dial the peer. + fn open_substream_or_dial( + &mut self, + peer: PeerId, + action: PeerAction, + query: Option, + ) -> Result<(), Error> { + match self.service.open_substream(peer) { + Ok(substream_id) => { + self.pending_substreams.insert(substream_id, peer); + self.peers.entry(peer).or_default().pending_actions.insert(substream_id, action); + + Ok(()) + } + Err(err) => { + tracing::trace!(target: LOG_TARGET, ?query, ?peer, ?err, "Failed to open substream. Dialing peer"); + + match self.service.dial(&peer) { + Ok(()) => { + self.pending_dials.entry(peer).or_default().push(action); + Ok(()) + } + + // Already connected is a recoverable error. + Err(ImmediateDialError::AlreadyConnected) => { + // Dial returned `Error::AlreadyConnected`, retry opening the substream. + match self.service.open_substream(peer) { + Ok(substream_id) => { + self.pending_substreams.insert(substream_id, peer); + self.peers + .entry(peer) + .or_default() + .pending_actions + .insert(substream_id, action); + Ok(()) + } + Err(err) => { + tracing::debug!(target: LOG_TARGET, ?query, ?peer, ?err, "Failed to open substream a second time"); + Err(err.into()) + } + } + } + + Err(error) => { + tracing::trace!(target: LOG_TARGET, ?query, ?peer, ?error, "Failed to dial peer"); + Err(error.into()) + } + } + } + } + } + + /// Handle next query action. + async fn on_query_action(&mut self, action: QueryAction) -> Result<(), (QueryId, PeerId)> { + match action { + QueryAction::SendMessage { query, peer, .. } => { + // This action is used for `FIND_NODE`, `GET_VALUE` and `GET_PROVIDERS` queries. + if self + .open_substream_or_dial(peer, PeerAction::SendFindNode(query), Some(query)) + .is_err() + { + // Announce the error to the query engine. + self.engine.register_send_failure(query, peer); + self.engine.register_response_failure(query, peer); + } + Ok(()) + } + QueryAction::FindNodeQuerySucceeded { + target, + peers, + query, + } => { + tracing::debug!( + target: LOG_TARGET, + ?query, + peer = ?target, + num_peers = ?peers.len(), + "`FIND_NODE` succeeded", + ); + + let _ = self + .event_tx + .send(KademliaEvent::FindNodeSuccess { + target, + query_id: query, + peers: peers + .into_iter() + .map(|info| (info.peer, info.addresses())) + .collect(), + }) + .await; + Ok(()) + } + QueryAction::PutRecordToFoundNodes { + query, + record, + peers, + quorum, + } => { + tracing::trace!( + target: LOG_TARGET, + ?query, + record_key = ?record.key, + num_peers = ?peers.len(), + "store record to found peers", + ); + let key = record.key.clone(); + let message: Bytes = KademliaMessage::put_value(record); + + for peer in &peers { + if let Err(error) = self.open_substream_or_dial( + peer.peer, + // `message` is cheaply clonable because of `Bytes` reference counting. + PeerAction::SendPutValue(query, message.clone()), + None, + ) { + tracing::debug!( + target: LOG_TARGET, + ?peer, + ?key, + ?error, + "failed to put record to peer", + ); + } + } + + self.engine.start_put_record_to_found_nodes_requests_tracking( + query, + key, + peers.into_iter().map(|peer| peer.peer).collect(), + quorum, + ); + + Ok(()) + } + QueryAction::PutRecordQuerySucceeded { query, key } => { + tracing::debug!(target: LOG_TARGET, ?query, "`PUT_VALUE` query succeeded"); + + let _ = self + .event_tx + .send(KademliaEvent::PutRecordSuccess { + query_id: query, + key, + }) + .await; + Ok(()) + } + QueryAction::AddProviderToFoundNodes { + query, + provided_key, + provider, + peers, + quorum, + } => { + tracing::trace!( + target: LOG_TARGET, + ?provided_key, + num_peers = ?peers.len(), + "add provider record to found peers", + ); + + let message = KademliaMessage::add_provider(provided_key.clone(), provider); + + for peer in &peers { + if let Err(error) = self.open_substream_or_dial( + peer.peer, + PeerAction::SendAddProvider(query, message.clone()), + None, + ) { + tracing::debug!( + target: LOG_TARGET, + ?peer, + ?provided_key, + ?error, + "failed to add provider record to peer", + ) + } + } + + self.engine.start_add_provider_to_found_nodes_requests_tracking( + query, + provided_key, + peers.into_iter().map(|peer| peer.peer).collect(), + quorum, + ); + + Ok(()) + } + QueryAction::AddProviderQuerySucceeded { + query, + provided_key, + } => { + tracing::debug!(target: LOG_TARGET, ?query, "`ADD_PROVIDER` query succeeded"); + + let _ = self + .event_tx + .send(KademliaEvent::AddProviderSuccess { + query_id: query, + provided_key, + }) + .await; + Ok(()) + } + QueryAction::GetRecordQueryDone { query_id } => { + let _ = self.event_tx.send(KademliaEvent::GetRecordSuccess { query_id }).await; + Ok(()) + } + QueryAction::GetProvidersQueryDone { + query_id, + provided_key, + providers, + } => { + let _ = self + .event_tx + .send(KademliaEvent::GetProvidersSuccess { + query_id, + provided_key, + providers, + }) + .await; + Ok(()) + } + QueryAction::QueryFailed { query } => { + tracing::debug!(target: LOG_TARGET, ?query, "query failed"); + + let _ = self.event_tx.send(KademliaEvent::QueryFailed { query_id: query }).await; + Ok(()) + } + QueryAction::GetRecordPartialResult { query_id, record } => { + let _ = self + .event_tx + .send(KademliaEvent::GetRecordPartialResult { query_id, record }) + .await; + Ok(()) + } + QueryAction::QuerySucceeded { .. } => Ok(()), + } + } + + /// [`Kademlia`] event loop. + pub async fn run(mut self) -> crate::Result<()> { + tracing::debug!(target: LOG_TARGET, "starting kademlia event loop"); + + loop { + // poll `QueryEngine` for next actions. + while let Some(action) = self.engine.next_action() { + if let Err((query, peer)) = self.on_query_action(action).await { + self.disconnect_peer(peer, Some(query)).await; + } + } + + tokio::select! { + event = self.service.next() => match event { + Some(TransportEvent::ConnectionEstablished { peer, endpoint }) => { + if let Err(error) = self.on_connection_established(peer, endpoint) { + tracing::debug!( + target: LOG_TARGET, + ?error, + "failed to handle established connection", + ); + } + } + Some(TransportEvent::ConnectionClosed { peer }) => { + self.disconnect_peer(peer, None).await; + } + Some(TransportEvent::SubstreamOpened { peer, direction, substream, .. }) => { + match direction { + Direction::Inbound => self.on_inbound_substream(peer, substream).await, + Direction::Outbound(substream_id) => { + if let Err(error) = self + .on_outbound_substream(peer, substream_id, substream) + .await + { + tracing::debug!( + target: LOG_TARGET, + ?peer, + ?substream_id, + ?error, + "failed to handle outbound substream", + ); + } + } + } + }, + Some(TransportEvent::SubstreamOpenFailure { substream, error }) => { + self.on_substream_open_failure(substream, error).await; + } + Some(TransportEvent::DialFailure { peer, addresses }) => + self.on_dial_failure(peer, addresses), + None => return Err(Error::EssentialTaskClosed), + }, + context = self.executor.next() => { + let QueryContext { peer, query_id, result } = context.unwrap(); + + match result { + QueryResult::SendSuccess { substream } => { + tracing::trace!( + target: LOG_TARGET, + ?peer, + query = ?query_id, + "message sent to peer", + ); + let _ = substream.close().await; + + if let Some(query_id) = query_id { + self.engine.register_send_success(query_id, peer); + } + } + // This is a workaround to gracefully handle older litep2p nodes not + // sending/receiving `PUT_VALUE` ACKs. This should eventually be removed. + // TODO: remove this as part of + // https://github.com/paritytech/litep2p/issues/429. + QueryResult::AssumeSendSuccess => { + tracing::trace!( + target: LOG_TARGET, + ?peer, + query = ?query_id, + "treating message as sent to peer", + ); + + if let Some(query_id) = query_id { + self.engine.register_send_success(query_id, peer); + } + } + QueryResult::SendFailure { reason } => { + tracing::debug!( + target: LOG_TARGET, + ?peer, + query = ?query_id, + ?reason, + "failed to send message to peer", + ); + + self.disconnect_peer(peer, query_id).await; + } + QueryResult::ReadSuccess { substream, message } => { + tracing::trace!( + target: LOG_TARGET, + ?peer, + query = ?query_id, + "message read from peer", + ); + + if let Some(query_id) = query_id { + // Read success for locally originating requests implies send + // success. + self.engine.register_send_success(query_id, peer); + } + + if let Err(error) = self.on_message_received( + peer, + query_id, + message, + substream + ).await { + tracing::debug!( + target: LOG_TARGET, + ?peer, + ?error, + "failed to process message", + ); + } + } + QueryResult::ReadFailure { reason } => { + tracing::debug!( + target: LOG_TARGET, + ?peer, + query = ?query_id, + ?reason, + "failed to read message from substream", + ); + + self.disconnect_peer(peer, query_id).await; + } + } + }, + command = self.cmd_rx.recv() => { + match command { + Some(KademliaCommand::FindNode { peer, query_id }) => { + tracing::debug!( + target: LOG_TARGET, + ?peer, + query = ?query_id, + "starting `FIND_NODE` query", + ); + + self.engine.start_find_node( + query_id, + peer, + self.routing_table + .closest(&Key::from(peer), self.replication_factor) + .into() + ); + } + Some(KademliaCommand::PutRecord { mut record, quorum, query_id }) => { + tracing::debug!( + target: LOG_TARGET, + query = ?query_id, + key = ?record.key, + "store record to DHT", + ); + + // For `PUT_VALUE` requests originating locally we are always the + // publisher. + record.publisher = Some(self.local_key.clone().into_preimage()); + + // Make sure TTL is set. + record.expires = record + .expires + .or_else(|| Some(Instant::now() + self.record_ttl)); + + let key = Key::new(record.key.clone()); + + self.store.put(record.clone()); + + self.engine.start_put_record( + query_id, + record, + self.routing_table.closest(&key, self.replication_factor).into(), + quorum, + ); + } + Some(KademliaCommand::PutRecordToPeers { + mut record, + query_id, + peers, + update_local_store, + quorum, + }) => { + tracing::debug!( + target: LOG_TARGET, + query = ?query_id, + key = ?record.key, + "store record to DHT to specified peers", + ); + + // Make sure TTL is set. + record.expires = record + .expires + .or_else(|| Some(Instant::now() + self.record_ttl)); + + if update_local_store { + self.store.put(record.clone()); + } + + // Put the record to the specified peers. + let peers = peers.into_iter().filter_map(|peer| { + if peer == self.service.local_peer_id() { + return None; + } + + match self.routing_table.entry(Key::from(peer)) { + KBucketEntry::Occupied(entry) => Some(entry.clone()), + KBucketEntry::Vacant(entry) if !entry.address_store.is_empty() => + Some(entry.clone()), + _ => None, + } + }).collect(); + + self.engine.start_put_record_to_peers( + query_id, + record, + peers, + quorum, + ); + } + Some(KademliaCommand::StartProviding { + key, + quorum, + query_id + }) => { + tracing::debug!( + target: LOG_TARGET, + query = ?query_id, + ?key, + "register as a content provider", + ); + + let addresses = self.service.public_addresses().get_addresses(); + let provider = ContentProvider { + peer: self.service.local_peer_id(), + addresses, + }; + + self.store.put_local_provider(key.clone(), quorum); + + self.engine.start_add_provider( + query_id, + key.clone(), + provider, + self.routing_table + .closest(&Key::new(key), self.replication_factor) + .into(), + quorum, + ); + } + Some(KademliaCommand::StopProviding { + key, + }) => { + tracing::debug!( + target: LOG_TARGET, + ?key, + "stop providing", + ); + + self.store.remove_local_provider(key); + } + Some(KademliaCommand::GetRecord { key, quorum, query_id }) => { + tracing::debug!(target: LOG_TARGET, ?key, "get record from DHT"); + + match (self.store.get(&key), quorum) { + (Some(record), Quorum::One) => { + let _ = self + .event_tx + .send(KademliaEvent::GetRecordPartialResult { query_id, record: PeerRecord { + peer: self.service.local_peer_id(), + record: record.clone(), + } }) + .await; + + let _ = self + .event_tx + .send(KademliaEvent::GetRecordSuccess { + query_id, + }) + .await; + } + (record, _) => { + let local_record = record.is_some(); + if let Some(record) = record { + let _ = self + .event_tx + .send(KademliaEvent::GetRecordPartialResult { query_id, record: PeerRecord { + peer: self.service.local_peer_id(), + record: record.clone(), + } }) + .await; + } + + self.engine.start_get_record( + query_id, + key.clone(), + self.routing_table + .closest(&Key::new(key), self.replication_factor) + .into(), + quorum, + local_record, + ); + } + } + + } + Some(KademliaCommand::GetProviders { key, query_id }) => { + tracing::debug!(target: LOG_TARGET, ?key, "get providers from DHT"); + + let known_providers = self.store.get_providers(&key); + + self.engine.start_get_providers( + query_id, + key.clone(), + self.routing_table + .closest(&Key::new(key), self.replication_factor) + .into(), + known_providers, + ); + } + Some(KademliaCommand::AddKnownPeer { peer, addresses }) => { + tracing::trace!( + target: LOG_TARGET, + ?peer, + ?addresses, + "add known peer", + ); + + self.routing_table.add_known_peer( + peer, + addresses.clone(), + self.peers + .get(&peer) + .map_or( + ConnectionType::NotConnected, + |_| ConnectionType::Connected, + ), + ); + self.service.add_known_address(&peer, addresses.into_iter()); + + } + Some(KademliaCommand::StoreRecord { mut record }) => { + tracing::debug!( + target: LOG_TARGET, + key = ?record.key, + "store record in local store", + ); + + // Make sure TTL is set. + record.expires = + record.expires.or_else(|| Some(Instant::now() + self.record_ttl)); + + self.store.put(record); + } + None => return Err(Error::EssentialTaskClosed), + } + }, + action = self.store.next_action() => match action { + Some(MemoryStoreAction::RefreshProvider { provided_key, provider, quorum }) => { + tracing::trace!( + target: LOG_TARGET, + ?provided_key, + "republishing local provider", + ); + + self.store.put_local_provider(provided_key.clone(), quorum); + + // We never update local provider addresses in the store during refresh, + // as this is done anyway when replying to `GET_PROVIDERS` request. + + let query_id = self.next_query_id(); + self.engine.start_add_provider( + query_id, + provided_key.clone(), + provider, + self.routing_table + .closest(&Key::new(provided_key), self.replication_factor) + .into(), + quorum, + ); + } + None => {} + } + } + } + } +} + +#[cfg(test)] +mod tests { + use super::*; + use crate::{ + codec::ProtocolCodec, + transport::{ + manager::{SubstreamKeepAlive, TransportManager, TransportManagerBuilder}, + KEEP_ALIVE_TIMEOUT, + }, + types::protocol::ProtocolName, + ConnectionId, + }; + use multiaddr::Protocol; + use multihash::Multihash; + use std::str::FromStr; + use tokio::sync::mpsc::channel; + + #[allow(unused)] + struct Context { + _cmd_tx: Sender, + event_rx: Receiver, + } + + fn make_kademlia() -> (Kademlia, Context, TransportManager) { + let manager = TransportManagerBuilder::new().build(); + + let peer = PeerId::random(); + let (transport_service, _tx) = TransportService::new( + peer, + ProtocolName::from("/kad/1"), + Vec::new(), + Default::default(), + manager.transport_manager_handle(), + KEEP_ALIVE_TIMEOUT, + SubstreamKeepAlive::Yes, + ); + let (event_tx, event_rx) = channel(64); + let (_cmd_tx, cmd_rx) = channel(64); + let next_query_id = Arc::new(AtomicUsize::new(0usize)); + + let config = Config { + protocol_names: vec![ProtocolName::from("/kad/1")], + known_peers: HashMap::new(), + codec: ProtocolCodec::UnsignedVarint(Some(70 * 1024)), + replication_factor: 20usize, + update_mode: RoutingTableUpdateMode::Automatic, + validation_mode: IncomingRecordValidationMode::Automatic, + record_ttl: Duration::from_secs(36 * 60 * 60), + memory_store_config: Default::default(), + event_tx, + cmd_rx, + next_query_id, + }; + + ( + Kademlia::new(transport_service, config), + Context { _cmd_tx, event_rx }, + manager, + ) + } + + #[tokio::test] + async fn check_get_records_update() { + let (mut kademlia, _context, _manager) = make_kademlia(); + + let key = RecordKey::from(vec![1, 2, 3]); + let records = vec![ + // 2 peers backing the same record. + PeerRecord { + peer: PeerId::random(), + record: Record::new(key.clone(), vec![0x1]), + }, + PeerRecord { + peer: PeerId::random(), + record: Record::new(key.clone(), vec![0x1]), + }, + // only 1 peer backing the record. + PeerRecord { + peer: PeerId::random(), + record: Record::new(key.clone(), vec![0x2]), + }, + ]; + + for record in records { + let action = QueryAction::GetRecordPartialResult { + query_id: QueryId(1), + record, + }; + assert!(kademlia.on_query_action(action).await.is_ok()); + } + + let query_id = QueryId(1); + let action = QueryAction::GetRecordQueryDone { query_id }; + assert!(kademlia.on_query_action(action).await.is_ok()); + + // Check the local storage should not get updated. + assert!(kademlia.store.get(&key).is_none()); + } + + #[tokio::test] + async fn check_get_records_update_with_expired_records() { + let (mut kademlia, _context, _manager) = make_kademlia(); + + let key = RecordKey::from(vec![1, 2, 3]); + let expired = std::time::Instant::now() - std::time::Duration::from_secs(10); + let records = vec![ + // 2 peers backing the same record, one record is expired. + PeerRecord { + peer: PeerId::random(), + record: Record { + key: key.clone(), + value: vec![0x1], + publisher: None, + expires: Some(expired), + }, + }, + PeerRecord { + peer: PeerId::random(), + record: Record::new(key.clone(), vec![0x1]), + }, + // 2 peer backing the record. + PeerRecord { + peer: PeerId::random(), + record: Record::new(key.clone(), vec![0x2]), + }, + PeerRecord { + peer: PeerId::random(), + record: Record::new(key.clone(), vec![0x2]), + }, + ]; + + for record in records { + let action = QueryAction::GetRecordPartialResult { + query_id: QueryId(1), + record, + }; + assert!(kademlia.on_query_action(action).await.is_ok()); + } + + kademlia + .on_query_action(QueryAction::GetRecordQueryDone { + query_id: QueryId(1), + }) + .await + .unwrap(); + + // Check the local storage should not get updated. + assert!(kademlia.store.get(&key).is_none()); + } + + #[tokio::test] + async fn check_address_store_routing_table_updates() { + let (mut kademlia, _context, _manager) = make_kademlia(); + + let peer = PeerId::random(); + let address_a = Multiaddr::from_str("/dns/domain1.com/tcp/30333").unwrap().with( + Protocol::P2p(Multihash::from_bytes(&peer.to_bytes()).unwrap()), + ); + let address_b = Multiaddr::from_str("/dns/domain1.com/tcp/30334").unwrap().with( + Protocol::P2p(Multihash::from_bytes(&peer.to_bytes()).unwrap()), + ); + let address_c = Multiaddr::from_str("/dns/domain1.com/tcp/30339").unwrap().with( + Protocol::P2p(Multihash::from_bytes(&peer.to_bytes()).unwrap()), + ); + + // Added only with address a. + kademlia.routing_table.add_known_peer( + peer, + vec![address_a.clone()], + ConnectionType::NotConnected, + ); + + // Check peer addresses. + match kademlia.routing_table.entry(Key::from(peer)) { + KBucketEntry::Occupied(entry) => { + assert_eq!(entry.addresses(), vec![address_a.clone()]); + } + _ => panic!("Peer not found in routing table"), + }; + + // Report successful connection with address b via dialer endpoint. + let _ = kademlia.on_connection_established( + peer, + Endpoint::Dialer { + address: address_b.clone(), + connection_id: ConnectionId::from(0), + }, + ); + + // Address B has a higher priority, as it was detected via the dialing mechanism of the + // transport manager, while address A is not dialed yet. + match kademlia.routing_table.entry(Key::from(peer)) { + KBucketEntry::Occupied(entry) => { + assert_eq!( + entry.addresses(), + vec![address_b.clone(), address_a.clone()] + ); + } + _ => panic!("Peer not found in routing table"), + }; + + // Report successful connection with a random address via listener endpoint. + let _ = kademlia.on_connection_established( + peer, + Endpoint::Listener { + address: address_c.clone(), + connection_id: ConnectionId::from(0), + }, + ); + // Address C was not added, as the peer has dialed us possibly on an ephemeral port. + match kademlia.routing_table.entry(Key::from(peer)) { + KBucketEntry::Occupied(entry) => { + assert_eq!( + entry.addresses(), + vec![address_b.clone(), address_a.clone()] + ); + } + _ => panic!("Peer not found in routing table"), + }; + + // Address B fails two times (which gives it a lower score than A) and + // makes it subject to removal. + kademlia.on_dial_failure(peer, vec![address_b.clone(), address_b.clone()]); + + match kademlia.routing_table.entry(Key::from(peer)) { + KBucketEntry::Occupied(entry) => { + assert_eq!( + entry.addresses(), + vec![address_a.clone(), address_b.clone()] + ); + } + _ => panic!("Peer not found in routing table"), + }; + } +} diff --git a/client/litep2p/src/protocol/libp2p/kademlia/query/find_many_nodes.rs b/client/litep2p/src/protocol/libp2p/kademlia/query/find_many_nodes.rs new file mode 100644 index 00000000..4be51b0d --- /dev/null +++ b/client/litep2p/src/protocol/libp2p/kademlia/query/find_many_nodes.rs @@ -0,0 +1,70 @@ +// Copyright 2023 litep2p developers +// +// Permission is hereby granted, free of charge, to any person obtaining a +// copy of this software and associated documentation files (the "Software"), +// to deal in the Software without restriction, including without limitation +// the rights to use, copy, modify, merge, publish, distribute, sublicense, +// and/or sell copies of the Software, and to permit persons to whom the +// Software is furnished to do so, subject to the following conditions: +// +// The above copyright notice and this permission notice shall be included in +// all copies or substantial portions of the Software. +// +// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS +// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE +// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER +// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING +// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER +// DEALINGS IN THE SOFTWARE. + +use crate::{ + protocol::libp2p::kademlia::{ + query::{QueryAction, QueryId}, + types::KademliaPeer, + }, + PeerId, +}; + +/// Context for multiple `FIND_NODE` queries. +// TODO: https://github.com/paritytech/litep2p/issues/80 implement finding nodes not present in the routing table. +#[derive(Debug)] +pub struct FindManyNodesContext { + /// Query ID. + pub query: QueryId, + + /// The peers we are looking for. + pub peers_to_report: Vec, +} + +impl FindManyNodesContext { + /// Creates a new [`FindManyNodesContext`]. + pub fn new(query: QueryId, peers_to_report: Vec) -> Self { + Self { + query, + peers_to_report, + } + } + + /// Register response failure for `peer`. + pub fn register_response_failure(&mut self, _peer: PeerId) {} + + /// Register `FIND_NODE` response from `peer`. + pub fn register_response(&mut self, _peer: PeerId, _peers: Vec) {} + + /// Register a failure of sending a request to `peer`. + pub fn register_send_failure(&mut self, _peer: PeerId) {} + + /// Register a success of sending a request to `peer`. + pub fn register_send_success(&mut self, _peer: PeerId) {} + + /// Get next action for `peer`. + pub fn next_peer_action(&mut self, _peer: &PeerId) -> Option { + None + } + + /// Get next action for a `FIND_NODE` query. + pub fn next_action(&mut self) -> Option { + Some(QueryAction::QuerySucceeded { query: self.query }) + } +} diff --git a/client/litep2p/src/protocol/libp2p/kademlia/query/find_node.rs b/client/litep2p/src/protocol/libp2p/kademlia/query/find_node.rs new file mode 100644 index 00000000..a354c397 --- /dev/null +++ b/client/litep2p/src/protocol/libp2p/kademlia/query/find_node.rs @@ -0,0 +1,717 @@ +// Copyright 2023 litep2p developers +// +// Permission is hereby granted, free of charge, to any person obtaining a +// copy of this software and associated documentation files (the "Software"), +// to deal in the Software without restriction, including without limitation +// the rights to use, copy, modify, merge, publish, distribute, sublicense, +// and/or sell copies of the Software, and to permit persons to whom the +// Software is furnished to do so, subject to the following conditions: +// +// The above copyright notice and this permission notice shall be included in +// all copies or substantial portions of the Software. +// +// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS +// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE +// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER +// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING +// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER +// DEALINGS IN THE SOFTWARE. + +use bytes::Bytes; + +use crate::{ + protocol::libp2p::kademlia::{ + message::KademliaMessage, + query::{QueryAction, QueryId}, + types::{Distance, KademliaPeer, Key}, + }, + PeerId, +}; + +use std::collections::{BTreeMap, HashMap, HashSet, VecDeque}; + +/// Logging target for the file. +const LOG_TARGET: &str = "litep2p::ipfs::kademlia::query::find_node"; + +/// Default timeout for a peer to respond to a query. +const DEFAULT_PEER_TIMEOUT: std::time::Duration = std::time::Duration::from_secs(10); + +/// The configuration needed to instantiate a new [`FindNodeContext`]. +#[derive(Debug, Clone)] +pub struct FindNodeConfig>> { + /// Local peer ID. + pub local_peer_id: PeerId, + + /// Replication factor. + pub replication_factor: usize, + + /// Parallelism factor. + pub parallelism_factor: usize, + + /// Query ID. + pub query: QueryId, + + /// Target key. + pub target: Key, +} + +/// Context for `FIND_NODE` queries. +#[derive(Debug)] +pub struct FindNodeContext>> { + /// Query immutable config. + pub config: FindNodeConfig, + + /// Cached Kademlia message to send. + kad_message: Bytes, + + /// Peers from whom the `QueryEngine` is waiting to hear a response. + pub pending: HashMap, + + /// Queried candidates. + /// + /// These are the peers for whom the query has already been sent + /// and who have either returned their closest peers or failed to answer. + pub queried: HashSet, + + /// Candidates. + pub candidates: BTreeMap, + + /// Responses. + pub responses: BTreeMap, + + /// The timeout after which the pending request is no longer + /// counting towards the parallelism factor. + /// + /// This is used to prevent the query from getting stuck when a peer + /// is slow or fails to respond in due time. + peer_timeout: std::time::Duration, + /// The number of pending responses that count towards the parallelism factor. + /// + /// These represent the number of peers added to the `Self::pending` minus the number of peers + /// that have failed to respond within the `Self::peer_timeout` + pending_responses: usize, +} + +impl>> FindNodeContext { + /// Create new [`FindNodeContext`]. + pub fn new(config: FindNodeConfig, in_peers: VecDeque) -> Self { + let mut candidates = BTreeMap::new(); + + for candidate in &in_peers { + let distance = config.target.distance(&candidate.key); + candidates.insert(distance, candidate.clone()); + } + + let kad_message = KademliaMessage::find_node(config.target.clone().into_preimage()); + + Self { + config, + kad_message, + + candidates, + pending: HashMap::new(), + queried: HashSet::new(), + responses: BTreeMap::new(), + + peer_timeout: DEFAULT_PEER_TIMEOUT, + pending_responses: 0, + } + } + + /// Register response failure for `peer`. + pub fn register_response_failure(&mut self, peer: PeerId) { + let Some((peer, instant)) = self.pending.remove(&peer) else { + tracing::debug!(target: LOG_TARGET, query = ?self.config.query, ?peer, "pending peer doesn't exist during response failure"); + return; + }; + self.pending_responses = self.pending_responses.saturating_sub(1); + + tracing::trace!(target: LOG_TARGET, query = ?self.config.query, ?peer, elapsed = ?instant.elapsed(), "peer failed to respond"); + + self.queried.insert(peer.peer); + } + + /// Register `FIND_NODE` response from `peer`. + pub fn register_response(&mut self, peer: PeerId, peers: Vec) { + let Some((peer, instant)) = self.pending.remove(&peer) else { + tracing::debug!(target: LOG_TARGET, query = ?self.config.query, ?peer, "received response from peer but didn't expect it"); + return; + }; + self.pending_responses = self.pending_responses.saturating_sub(1); + + tracing::trace!(target: LOG_TARGET, query = ?self.config.query, ?peer, elapsed = ?instant.elapsed(), "received response from peer"); + + // calculate distance for `peer` from target and insert it if + // a) the map doesn't have 20 responses + // b) it can replace some other peer that has a higher distance + let distance = self.config.target.distance(&peer.key); + + // always mark the peer as queried to prevent it getting queried again + self.queried.insert(peer.peer); + + if self.responses.len() < self.config.replication_factor { + self.responses.insert(distance, peer); + } else { + // Update the furthest peer if this response is closer. + // Find the furthest distance. + let furthest_distance = + self.responses.last_entry().map(|entry| *entry.key()).unwrap_or(distance); + + // The response received from the peer is closer than the furthest response. + if distance < furthest_distance { + self.responses.insert(distance, peer); + + // Remove the furthest entry. + if self.responses.len() > self.config.replication_factor { + self.responses.pop_last(); + } + } + } + + let to_query_candidate = peers.into_iter().filter_map(|peer| { + // Peer already produced a response. + if self.queried.contains(&peer.peer) { + return None; + } + + // Peer was queried, awaiting response. + if self.pending.contains_key(&peer.peer) { + return None; + } + + // Local node. + if self.config.local_peer_id == peer.peer { + return None; + } + + Some(peer) + }); + + for candidate in to_query_candidate { + let distance = self.config.target.distance(&candidate.key); + self.candidates.insert(distance, candidate); + } + } + + /// Register a failure of sending `FIN_NODE` request to `peer`. + pub fn register_send_failure(&mut self, _peer: PeerId) { + // In case of a send failure, `register_response_failure` is called as well. + // Failure is handled there. + } + + /// Register a success of sending `FIND_NODE` request to `peer`. + pub fn register_send_success(&mut self, _peer: PeerId) { + // `FIND_NODE` requests are compound request-response pairs of messages, + // so we handle final success/failure in `register_response`/`register_response_failure`. + } + + /// Get next action for `peer`. + pub fn next_peer_action(&mut self, peer: &PeerId) -> Option { + self.pending.contains_key(peer).then_some(QueryAction::SendMessage { + query: self.config.query, + peer: *peer, + message: self.kad_message.clone(), + }) + } + + /// Schedule next peer for outbound `FIND_NODE` query. + fn schedule_next_peer(&mut self) -> Option { + tracing::trace!(target: LOG_TARGET, query = ?self.config.query, "get next peer"); + + let (_, candidate) = self.candidates.pop_first()?; + let peer = candidate.peer; + + tracing::trace!(target: LOG_TARGET, query = ?self.config.query, ?peer, "current candidate"); + self.pending.insert(candidate.peer, (candidate, std::time::Instant::now())); + self.pending_responses = self.pending_responses.saturating_add(1); + + Some(QueryAction::SendMessage { + query: self.config.query, + peer, + message: self.kad_message.clone(), + }) + } + + /// Check if the query cannot make any progress. + /// + /// Returns true when there are no pending responses and no candidates to query. + fn is_done(&self) -> bool { + self.pending.is_empty() && self.candidates.is_empty() + } + + /// Get next action for a `FIND_NODE` query. + pub fn next_action(&mut self) -> Option { + // If we cannot make progress, return the final result. + // A query failed when we are not able to identify one single peer. + if self.is_done() { + tracing::trace!( + target: LOG_TARGET, + query = ?self.config.query, + pending = self.pending.len(), + candidates = self.candidates.len(), + "query finished" + ); + + return if self.responses.is_empty() { + Some(QueryAction::QueryFailed { + query: self.config.query, + }) + } else { + Some(QueryAction::QuerySucceeded { + query: self.config.query, + }) + }; + } + + for (peer, instant) in self.pending.values() { + if instant.elapsed() > self.peer_timeout { + tracing::trace!( + target: LOG_TARGET, + query = ?self.config.query, + ?peer, + elapsed = ?instant.elapsed(), + "peer no longer counting towards parallelism factor" + ); + self.pending_responses = self.pending_responses.saturating_sub(1); + } + } + + // At this point, we either have pending responses or candidates to query; and we need more + // results. Ensure we do not exceed the parallelism factor. + if self.pending_responses == self.config.parallelism_factor { + return None; + } + + // Schedule the next peer to fill up the responses. + if self.responses.len() < self.config.replication_factor { + return self.schedule_next_peer(); + } + + // We can finish the query here, but check if there is a better candidate for the query. + match ( + self.candidates.first_key_value(), + self.responses.last_key_value(), + ) { + (Some((_, candidate_peer)), Some((worst_response_distance, _))) => { + let first_candidate_distance = self.config.target.distance(&candidate_peer.key); + if first_candidate_distance < *worst_response_distance { + return self.schedule_next_peer(); + } + } + + _ => (), + } + + // We have found enough responses and there are no better candidates to query. + Some(QueryAction::QuerySucceeded { + query: self.config.query, + }) + } +} + +#[cfg(test)] +mod tests { + use super::*; + use crate::protocol::libp2p::kademlia::types::ConnectionType; + + fn default_config() -> FindNodeConfig> { + FindNodeConfig { + local_peer_id: PeerId::random(), + replication_factor: 20, + parallelism_factor: 10, + query: QueryId(0), + target: Key::new(vec![1, 2, 3]), + } + } + + fn peer_to_kad(peer: PeerId) -> KademliaPeer { + KademliaPeer { + peer, + key: Key::from(peer), + address_store: Default::default(), + connection: ConnectionType::Connected, + } + } + + fn setup_closest_responses() -> (PeerId, PeerId, FindNodeConfig) { + let peer_a = PeerId::random(); + let peer_b = PeerId::random(); + let target = PeerId::random(); + + let distance_a = Key::from(peer_a).distance(&Key::from(target)); + let distance_b = Key::from(peer_b).distance(&Key::from(target)); + + let (closest, furthest) = if distance_a < distance_b { + (peer_a, peer_b) + } else { + (peer_b, peer_a) + }; + + let config = FindNodeConfig { + parallelism_factor: 1, + replication_factor: 1, + target: Key::from(target), + local_peer_id: PeerId::random(), + query: QueryId(0), + }; + + (closest, furthest, config) + } + + #[test] + fn completes_when_no_candidates() { + let config = default_config(); + let mut context = FindNodeContext::new(config, VecDeque::new()); + assert!(context.is_done()); + let event = context.next_action().unwrap(); + match event { + QueryAction::QueryFailed { query, .. } => { + assert_eq!(query, QueryId(0)); + } + _ => panic!("Unexpected event"), + }; + } + + #[test] + fn fulfill_parallelism() { + let config = FindNodeConfig { + parallelism_factor: 3, + ..default_config() + }; + + let in_peers_set = (0..3).map(|_| PeerId::random()).collect::>(); + let in_peers = in_peers_set.iter().map(|peer| peer_to_kad(*peer)).collect(); + let mut context = FindNodeContext::new(config, in_peers); + + for num in 0..3 { + let event = context.next_action().unwrap(); + match event { + QueryAction::SendMessage { query, peer, .. } => { + assert_eq!(query, QueryId(0)); + // Added as pending. + assert_eq!(context.pending.len(), num + 1); + assert!(context.pending.contains_key(&peer)); + + // Check the peer is the one provided. + assert!(in_peers_set.contains(&peer)); + } + _ => panic!("Unexpected event"), + } + } + + // Fulfilled parallelism. + assert!(context.next_action().is_none()); + } + + #[test] + fn fulfill_parallelism_with_timeout_optimization() { + let config = FindNodeConfig { + parallelism_factor: 3, + ..default_config() + }; + + let in_peers_set = (0..4).map(|_| PeerId::random()).collect::>(); + let in_peers = in_peers_set.iter().map(|peer| peer_to_kad(*peer)).collect(); + let mut context = FindNodeContext::new(config, in_peers); + // Test overwrite. + context.peer_timeout = std::time::Duration::from_secs(1); + + for num in 0..3 { + let event = context.next_action().unwrap(); + match event { + QueryAction::SendMessage { query, peer, .. } => { + assert_eq!(query, QueryId(0)); + // Added as pending. + assert_eq!(context.pending.len(), num + 1); + assert!(context.pending.contains_key(&peer)); + + // Check the peer is the one provided. + assert!(in_peers_set.contains(&peer)); + } + _ => panic!("Unexpected event"), + } + } + + // Fulfilled parallelism. + assert!(context.next_action().is_none()); + + // Sleep more than 1 second. + std::thread::sleep(std::time::Duration::from_secs(2)); + + // The pending responses are reset only on the next query action. + assert_eq!(context.pending_responses, 3); + assert_eq!(context.pending.len(), 3); + + // This allows other peers to be queried. + let event = context.next_action().unwrap(); + match event { + QueryAction::SendMessage { query, peer, .. } => { + assert_eq!(query, QueryId(0)); + // Added as pending. + assert_eq!(context.pending.len(), 4); + assert!(context.pending.contains_key(&peer)); + + // Check the peer is the one provided. + assert!(in_peers_set.contains(&peer)); + } + _ => panic!("Unexpected event"), + } + + assert_eq!(context.pending_responses, 1); + assert_eq!(context.pending.len(), 4); + } + + #[test] + fn completes_when_responses() { + let config = FindNodeConfig { + parallelism_factor: 3, + replication_factor: 3, + ..default_config() + }; + + let peer_a = PeerId::random(); + let peer_b = PeerId::random(); + let peer_c = PeerId::random(); + + let in_peers_set: HashSet<_> = [peer_a, peer_b, peer_c].into_iter().collect(); + assert_eq!(in_peers_set.len(), 3); + + let in_peers = [peer_a, peer_b, peer_c].iter().map(|peer| peer_to_kad(*peer)).collect(); + let mut context = FindNodeContext::new(config, in_peers); + + // Schedule peer queries. + for num in 0..3 { + let event = context.next_action().unwrap(); + match event { + QueryAction::SendMessage { query, peer, .. } => { + assert_eq!(query, QueryId(0)); + // Added as pending. + assert_eq!(context.pending.len(), num + 1); + assert!(context.pending.contains_key(&peer)); + + // Check the peer is the one provided. + assert!(in_peers_set.contains(&peer)); + } + _ => panic!("Unexpected event"), + } + } + + // Checks a failed query that was not initiated. + let peer_d = PeerId::random(); + context.register_response_failure(peer_d); + assert_eq!(context.pending.len(), 3); + assert!(context.queried.is_empty()); + + // Provide responses back. + context.register_response(peer_a, vec![]); + assert_eq!(context.pending.len(), 2); + assert_eq!(context.queried.len(), 1); + assert_eq!(context.responses.len(), 1); + + // Provide different response from peer b with peer d as candidate. + context.register_response(peer_b, vec![peer_to_kad(peer_d)]); + assert_eq!(context.pending.len(), 1); + assert_eq!(context.queried.len(), 2); + assert_eq!(context.responses.len(), 2); + assert_eq!(context.candidates.len(), 1); + + // Peer C fails. + context.register_response_failure(peer_c); + assert!(context.pending.is_empty()); + assert_eq!(context.queried.len(), 3); + assert_eq!(context.responses.len(), 2); + + // Drain the last candidate. + let event = context.next_action().unwrap(); + match event { + QueryAction::SendMessage { query, peer, .. } => { + assert_eq!(query, QueryId(0)); + // Added as pending. + assert_eq!(context.pending.len(), 1); + assert_eq!(peer, peer_d); + } + _ => panic!("Unexpected event"), + } + + // Peer D responds. + context.register_response(peer_d, vec![]); + + // Produces the result. + let event = context.next_action().unwrap(); + match event { + QueryAction::QuerySucceeded { query, .. } => { + assert_eq!(query, QueryId(0)); + } + _ => panic!("Unexpected event"), + }; + } + + #[test] + fn offers_closest_responses() { + let (closest, furthest, config) = setup_closest_responses(); + + // Scenario where we should return with the number of responses. + let in_peers = vec![peer_to_kad(furthest), peer_to_kad(closest)]; + let mut context = FindNodeContext::new(config.clone(), in_peers.into_iter().collect()); + + let event = context.next_action().unwrap(); + match event { + QueryAction::SendMessage { query, peer, .. } => { + assert_eq!(query, QueryId(0)); + // Added as pending. + assert_eq!(context.pending.len(), 1); + assert!(context.pending.contains_key(&peer)); + + // The closest should be queried first regardless of the input order. + assert_eq!(closest, peer); + } + _ => panic!("Unexpected event"), + } + + context.register_response(closest, vec![]); + + let event = context.next_action().unwrap(); + match event { + QueryAction::QuerySucceeded { query } => { + assert_eq!(query, QueryId(0)); + } + _ => panic!("Unexpected event"), + }; + } + + #[test] + fn offers_closest_responses_with_better_candidates() { + let (closest, furthest, config) = setup_closest_responses(); + + // Scenario where the query is fulfilled however it continues because + // there is a closer peer to query. + let in_peers = vec![peer_to_kad(furthest)]; + let mut context = FindNodeContext::new(config, in_peers.into_iter().collect()); + + let event = context.next_action().unwrap(); + match event { + QueryAction::SendMessage { query, peer, .. } => { + assert_eq!(query, QueryId(0)); + // Added as pending. + assert_eq!(context.pending.len(), 1); + assert!(context.pending.contains_key(&peer)); + + // Furthest is the only peer available. + assert_eq!(furthest, peer); + } + _ => panic!("Unexpected event"), + } + + // Furthest node produces a response with the closest node. + // Even if we reach a total of 1 (parallelism factor) replies, we should continue. + context.register_response(furthest, vec![peer_to_kad(closest)]); + + let event = context.next_action().unwrap(); + match event { + QueryAction::SendMessage { query, peer, .. } => { + assert_eq!(query, QueryId(0)); + // Added as pending. + assert_eq!(context.pending.len(), 1); + assert!(context.pending.contains_key(&peer)); + + // Furthest provided another peer that is closer. + assert_eq!(closest, peer); + } + _ => panic!("Unexpected event"), + } + + // Even if we have the total number of responses, we have at least one + // inflight query which might be closer to the target. + assert!(context.next_action().is_none()); + + // Query finishes when receiving the response back. + context.register_response(closest, vec![]); + + let event = context.next_action().unwrap(); + match event { + QueryAction::QuerySucceeded { query, .. } => { + assert_eq!(query, QueryId(0)); + } + _ => panic!("Unexpected event"), + }; + } + + #[test] + fn keep_k_best_results() { + let mut peers = (0..6).map(|_| PeerId::random()).collect::>(); + let target = Key::from(PeerId::random()); + // Sort the peers by their distance to the target in descending order. + peers.sort_by_key(|peer| std::cmp::Reverse(target.distance(&Key::from(*peer)))); + + let config = FindNodeConfig { + parallelism_factor: 3, + replication_factor: 3, + target, + local_peer_id: PeerId::random(), + query: QueryId(0), + }; + + let in_peers = vec![peers[0], peers[1], peers[2]] + .iter() + .map(|peer| peer_to_kad(*peer)) + .collect(); + let mut context = FindNodeContext::new(config, in_peers); + + // Schedule peer queries. + for num in 0..3 { + let event = context.next_action().unwrap(); + match event { + QueryAction::SendMessage { query, peer, .. } => { + assert_eq!(query, QueryId(0)); + // Added as pending. + assert_eq!(context.pending.len(), num + 1); + assert!(context.pending.contains_key(&peer)); + } + _ => panic!("Unexpected event"), + } + } + + // Each peer responds with a better (closer) peer. + context.register_response(peers[0], vec![peer_to_kad(peers[3])]); + context.register_response(peers[1], vec![peer_to_kad(peers[4])]); + context.register_response(peers[2], vec![peer_to_kad(peers[5])]); + + // Must schedule better peers. + for num in 0..3 { + let event = context.next_action().unwrap(); + match event { + QueryAction::SendMessage { query, peer, .. } => { + assert_eq!(query, QueryId(0)); + // Added as pending. + assert_eq!(context.pending.len(), num + 1); + assert!(context.pending.contains_key(&peer)); + } + _ => panic!("Unexpected event"), + } + } + + context.register_response(peers[3], vec![]); + context.register_response(peers[4], vec![]); + context.register_response(peers[5], vec![]); + + // Produces the result. + let event = context.next_action().unwrap(); + match event { + QueryAction::QuerySucceeded { query } => { + assert_eq!(query, QueryId(0)); + } + _ => panic!("Unexpected event"), + }; + + // Because the FindNode query keeps a window of the best K (3 in this case) peers, + // we expect to produce the best K peers. As opposed to having only the last entry + // updated, which would have produced [peer[0], peer[1], peer[5]]. + + // Check the responses. + let responses = context.responses.values().map(|peer| peer.peer).collect::>(); + // Note: peers are returned in order closest to the target, our `peers` input is sorted in + // decreasing order. + assert_eq!(responses, [peers[5], peers[4], peers[3]]); + } +} diff --git a/client/litep2p/src/protocol/libp2p/kademlia/query/get_providers.rs b/client/litep2p/src/protocol/libp2p/kademlia/query/get_providers.rs new file mode 100644 index 00000000..9596e036 --- /dev/null +++ b/client/litep2p/src/protocol/libp2p/kademlia/query/get_providers.rs @@ -0,0 +1,528 @@ +// Copyright 2024 litep2p developers +// +// Permission is hereby granted, free of charge, to any person obtaining a +// copy of this software and associated documentation files (the "Software"), +// to deal in the Software without restriction, including without limitation +// the rights to use, copy, modify, merge, publish, distribute, sublicense, +// and/or sell copies of the Software, and to permit persons to whom the +// Software is furnished to do so, subject to the following conditions: +// +// The above copyright notice and this permission notice shall be included in +// all copies or substantial portions of the Software. +// +// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS +// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE +// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER +// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING +// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER +// DEALINGS IN THE SOFTWARE. + +use bytes::Bytes; + +use crate::{ + protocol::libp2p::kademlia::{ + message::KademliaMessage, + query::{QueryAction, QueryId}, + record::{ContentProvider, Key as RecordKey}, + types::{Distance, KademliaPeer, Key}, + }, + types::multiaddr::Multiaddr, + PeerId, +}; + +use std::collections::{BTreeMap, HashMap, HashSet, VecDeque}; + +/// Logging target for the file. +const LOG_TARGET: &str = "litep2p::ipfs::kademlia::query::get_providers"; + +/// The configuration needed to instantiate a new [`GetProvidersContext`]. +#[derive(Debug)] +pub struct GetProvidersConfig { + /// Local peer ID. + pub local_peer_id: PeerId, + + /// Parallelism factor. + pub parallelism_factor: usize, + + /// Query ID. + pub query: QueryId, + + /// Target key. + pub target: Key, + + /// Known providers from the local store. + pub known_providers: Vec, +} + +#[derive(Debug)] +pub struct GetProvidersContext { + /// Query immutable config. + pub config: GetProvidersConfig, + + /// Cached Kademlia message to send. + kad_message: Bytes, + + /// Peers from whom the `QueryEngine` is waiting to hear a response. + pub pending: HashMap, + + /// Queried candidates. + /// + /// These are the peers for whom the query has already been sent + /// and who have either returned their closest peers or failed to answer. + pub queried: HashSet, + + /// Candidates. + pub candidates: BTreeMap, + + /// Found providers. + pub found_providers: Vec, +} + +impl GetProvidersContext { + /// Create new [`GetProvidersContext`]. + pub fn new(config: GetProvidersConfig, candidate_peers: VecDeque) -> Self { + let mut candidates = BTreeMap::new(); + + for peer in &candidate_peers { + let distance = config.target.distance(&peer.key); + candidates.insert(distance, peer.clone()); + } + + let kad_message = + KademliaMessage::get_providers_request(config.target.clone().into_preimage()); + + Self { + config, + kad_message, + candidates, + pending: HashMap::new(), + queried: HashSet::new(), + found_providers: Vec::new(), + } + } + + /// Get the found providers. + pub fn found_providers(self) -> Vec { + Self::merge_and_sort_providers( + self.config.known_providers.into_iter().chain(self.found_providers), + self.config.target, + ) + } + + fn merge_and_sort_providers( + found_providers: impl IntoIterator, + target: Key, + ) -> Vec { + // Merge addresses of different provider records of the same peer. + let mut providers = HashMap::>::new(); + found_providers.into_iter().for_each(|provider| { + providers.entry(provider.peer).or_default().extend(provider.addresses()) + }); + + // Convert into `Vec` + let mut providers = providers + .into_iter() + .map(|(peer, addresses)| ContentProvider { + peer, + addresses: addresses.into_iter().collect(), + }) + .collect::>(); + + // Sort by the provider distance to the target key. + providers.sort_unstable_by(|p1, p2| { + Key::from(p1.peer).distance(&target).cmp(&Key::from(p2.peer).distance(&target)) + }); + + providers + } + + /// Register response failure for `peer`. + pub fn register_response_failure(&mut self, peer: PeerId) { + let Some(peer) = self.pending.remove(&peer) else { + tracing::debug!( + target: LOG_TARGET, + query = ?self.config.query, + ?peer, + "`GetProvidersContext`: pending peer doesn't exist", + ); + return; + }; + + self.queried.insert(peer.peer); + } + + /// Register `GET_PROVIDERS` response from `peer`. + pub fn register_response( + &mut self, + peer: PeerId, + providers: impl IntoIterator, + closer_peers: impl IntoIterator, + ) { + tracing::trace!( + target: LOG_TARGET, + query = ?self.config.query, + ?peer, + "`GetProvidersContext`: received response from peer", + ); + + let Some(peer) = self.pending.remove(&peer) else { + tracing::debug!( + target: LOG_TARGET, + query = ?self.config.query, + ?peer, + "`GetProvidersContext`: received response from peer but didn't expect it", + ); + return; + }; + + self.found_providers.extend(providers); + + // Add the queried peer to `queried` and all new peers which haven't been + // queried to `candidates` + self.queried.insert(peer.peer); + + let to_query_candidate = closer_peers.into_iter().filter_map(|peer| { + // Peer already produced a response. + if self.queried.contains(&peer.peer) { + return None; + } + + // Peer was queried, awaiting response. + if self.pending.contains_key(&peer.peer) { + return None; + } + + // Local node. + if self.config.local_peer_id == peer.peer { + return None; + } + + Some(peer) + }); + + for candidate in to_query_candidate { + let distance = self.config.target.distance(&candidate.key); + self.candidates.insert(distance, candidate); + } + } + + /// Register a failure of sending a `GET_PROVIDERS` request to `peer`. + pub fn register_send_failure(&mut self, _peer: PeerId) { + // In case of a send failure, `register_response_failure` is called as well. + // Failure is handled there. + } + + /// Register a success of sending a `GET_PROVIDERS` request to `peer`. + pub fn register_send_success(&mut self, _peer: PeerId) { + // `GET_PROVIDERS` requests are compound request-response pairs of messages, + // so we handle final success/failure in `register_response`/`register_response_failure`. + } + + /// Get next action for `peer`. + // TODO: https://github.com/paritytech/litep2p/issues/40 remove this and store the next action to `PeerAction` + pub fn next_peer_action(&mut self, peer: &PeerId) -> Option { + self.pending.contains_key(peer).then_some(QueryAction::SendMessage { + query: self.config.query, + peer: *peer, + message: self.kad_message.clone(), + }) + } + + /// Schedule next peer for outbound `GET_VALUE` query. + fn schedule_next_peer(&mut self) -> Option { + tracing::trace!( + target: LOG_TARGET, + query = ?self.config.query, + "`GetProvidersContext`: get next peer", + ); + + let (_, candidate) = self.candidates.pop_first()?; + let peer = candidate.peer; + + tracing::trace!( + target: LOG_TARGET, + query = ?self.config.query, + ?peer, + "`GetProvidersContext`: current candidate", + ); + self.pending.insert(candidate.peer, candidate); + + Some(QueryAction::SendMessage { + query: self.config.query, + peer, + message: self.kad_message.clone(), + }) + } + + /// Check if the query cannot make any progress. + /// + /// Returns true when there are no pending responses and no candidates to query. + fn is_done(&self) -> bool { + self.pending.is_empty() && self.candidates.is_empty() + } + + /// Get next action for a `GET_PROVIDERS` query. + pub fn next_action(&mut self) -> Option { + if self.is_done() { + // If we cannot make progress, return the final result. + // A query failed when we are not able to find any providers. + if self.found_providers.is_empty() { + Some(QueryAction::QueryFailed { + query: self.config.query, + }) + } else { + Some(QueryAction::QuerySucceeded { + query: self.config.query, + }) + } + } else if self.pending.len() == self.config.parallelism_factor { + // At this point, we either have pending responses or candidates to query; and we need + // more records. Ensure we do not exceed the parallelism factor. + None + } else { + self.schedule_next_peer() + } + } +} + +#[cfg(test)] +mod tests { + use super::*; + use crate::protocol::libp2p::kademlia::types::ConnectionType; + use multiaddr::multiaddr; + + fn default_config() -> GetProvidersConfig { + GetProvidersConfig { + local_peer_id: PeerId::random(), + parallelism_factor: 3, + query: QueryId(0), + target: Key::new(vec![1, 2, 3].into()), + known_providers: vec![], + } + } + + fn peer_to_kad(peer: PeerId) -> KademliaPeer { + KademliaPeer { + peer, + key: Key::from(peer), + address_store: Default::default(), + connection: ConnectionType::NotConnected, + } + } + + fn peer_to_kad_with_addresses(peer: PeerId, addresses: Vec) -> KademliaPeer { + KademliaPeer::new(peer, addresses, ConnectionType::NotConnected) + } + + #[test] + fn completes_when_no_candidates() { + let config = default_config(); + + let mut context = GetProvidersContext::new(config, VecDeque::new()); + assert!(context.is_done()); + + let event = context.next_action().unwrap(); + match event { + QueryAction::QueryFailed { query, .. } => { + assert_eq!(query, QueryId(0)); + } + _ => panic!("Unexpected event"), + } + } + + #[test] + fn fulfill_parallelism() { + let config = GetProvidersConfig { + parallelism_factor: 3, + ..default_config() + }; + + let candidate_peer_set: HashSet<_> = + [PeerId::random(), PeerId::random(), PeerId::random()].into_iter().collect(); + assert_eq!(candidate_peer_set.len(), 3); + + let candidate_peers = candidate_peer_set.iter().map(|peer| peer_to_kad(*peer)).collect(); + let mut context = GetProvidersContext::new(config, candidate_peers); + + for num in 0..3 { + let event = context.next_action().unwrap(); + match event { + QueryAction::SendMessage { query, peer, .. } => { + assert_eq!(query, QueryId(0)); + // Added as pending. + assert_eq!(context.pending.len(), num + 1); + assert!(context.pending.contains_key(&peer)); + + // Check the peer is the one provided. + assert!(candidate_peer_set.contains(&peer)); + } + _ => panic!("Unexpected event"), + } + } + + // Fulfilled parallelism. + assert!(context.next_action().is_none()); + } + + #[test] + fn completes_when_responses() { + let config = GetProvidersConfig { + parallelism_factor: 3, + ..default_config() + }; + + let peer_a = PeerId::random(); + let peer_b = PeerId::random(); + let peer_c = PeerId::random(); + + let candidate_peer_set: HashSet<_> = [peer_a, peer_b, peer_c].into_iter().collect(); + assert_eq!(candidate_peer_set.len(), 3); + + let candidate_peers = + [peer_a, peer_b, peer_c].iter().map(|peer| peer_to_kad(*peer)).collect(); + let mut context = GetProvidersContext::new(config, candidate_peers); + + let [provider1, provider2, provider3, provider4] = (0..4) + .map(|_| ContentProvider { + peer: PeerId::random(), + addresses: vec![], + }) + .collect::>() + .try_into() + .unwrap(); + + // Schedule peer queries. + for num in 0..3 { + let event = context.next_action().unwrap(); + match event { + QueryAction::SendMessage { query, peer, .. } => { + assert_eq!(query, QueryId(0)); + // Added as pending. + assert_eq!(context.pending.len(), num + 1); + assert!(context.pending.contains_key(&peer)); + + // Check the peer is the one provided. + assert!(candidate_peer_set.contains(&peer)); + } + _ => panic!("Unexpected event"), + } + } + + // Checks a failed query that was not initiated. + let peer_d = PeerId::random(); + context.register_response_failure(peer_d); + assert_eq!(context.pending.len(), 3); + assert!(context.queried.is_empty()); + + // Provide responses back. + let providers = vec![provider1.clone().into(), provider2.clone().into()]; + context.register_response(peer_a, providers, vec![]); + assert_eq!(context.pending.len(), 2); + assert_eq!(context.queried.len(), 1); + assert_eq!(context.found_providers.len(), 2); + + // Provide different response from peer b with peer d as candidate. + let providers = vec![provider2.clone().into(), provider3.clone().into()]; + let candidates = vec![peer_to_kad(peer_d)]; + context.register_response(peer_b, providers, candidates); + assert_eq!(context.pending.len(), 1); + assert_eq!(context.queried.len(), 2); + assert_eq!(context.found_providers.len(), 4); + assert_eq!(context.candidates.len(), 1); + + // Peer C fails. + context.register_response_failure(peer_c); + assert!(context.pending.is_empty()); + assert_eq!(context.queried.len(), 3); + assert_eq!(context.found_providers.len(), 4); + + // Drain the last candidate. + let event = context.next_action().unwrap(); + match event { + QueryAction::SendMessage { query, peer, .. } => { + assert_eq!(query, QueryId(0)); + // Added as pending. + assert_eq!(context.pending.len(), 1); + assert_eq!(peer, peer_d); + } + _ => panic!("Unexpected event"), + } + + // Peer D responds. + let providers = vec![provider4.clone().into()]; + context.register_response(peer_d, providers, vec![]); + + // Produces the result. + let event = context.next_action().unwrap(); + match event { + QueryAction::QuerySucceeded { query, .. } => { + assert_eq!(query, QueryId(0)); + } + _ => panic!("Unexpected event"), + } + + // Check results. + let found_providers = context.found_providers(); + assert_eq!(found_providers.len(), 4); + assert!(found_providers.contains(&provider1)); + assert!(found_providers.contains(&provider2)); + assert!(found_providers.contains(&provider3)); + assert!(found_providers.contains(&provider4)); + } + + #[test] + fn providers_sorted_by_distance() { + let target = Key::new(vec![1, 2, 3].into()); + + let mut peers = (0..10).map(|_| PeerId::random()).collect::>(); + let providers = peers.iter().map(|peer| peer_to_kad(*peer)).collect::>(); + + let found_providers = + GetProvidersContext::merge_and_sort_providers(providers, target.clone()); + + peers.sort_by(|p1, p2| { + Key::from(*p1).distance(&target).cmp(&Key::from(*p2).distance(&target)) + }); + + assert!( + std::iter::zip(found_providers.into_iter(), peers.into_iter()) + .all(|(provider, peer)| provider.peer == peer) + ); + } + + #[test] + fn provider_addresses_merged() { + let peer = PeerId::random(); + + let address1 = multiaddr!(Ip4([127, 0, 0, 1]), Tcp(10000u16)); + let address2 = multiaddr!(Ip4([192, 168, 0, 1]), Tcp(10000u16)); + let address3 = multiaddr!(Ip4([10, 0, 0, 1]), Tcp(10000u16)); + let address4 = multiaddr!(Ip4([1, 1, 1, 1]), Tcp(10000u16)); + let address5 = multiaddr!(Ip4([8, 8, 8, 8]), Tcp(10000u16)); + + let provider1 = peer_to_kad_with_addresses(peer, vec![address1.clone()]); + let provider2 = peer_to_kad_with_addresses( + peer, + vec![address2.clone(), address3.clone(), address4.clone()], + ); + let provider3 = peer_to_kad_with_addresses(peer, vec![address4.clone(), address5.clone()]); + + let providers = vec![provider1, provider2, provider3]; + + let found_providers = GetProvidersContext::merge_and_sort_providers( + providers, + Key::new(vec![1, 2, 3].into()), + ); + + assert_eq!(found_providers.len(), 1); + + let addresses = &found_providers.first().unwrap().addresses; + assert_eq!(addresses.len(), 5); + assert!(addresses.contains(&address1)); + assert!(addresses.contains(&address2)); + assert!(addresses.contains(&address3)); + assert!(addresses.contains(&address4)); + assert!(addresses.contains(&address5)); + } +} diff --git a/client/litep2p/src/protocol/libp2p/kademlia/query/get_record.rs b/client/litep2p/src/protocol/libp2p/kademlia/query/get_record.rs new file mode 100644 index 00000000..cc143efa --- /dev/null +++ b/client/litep2p/src/protocol/libp2p/kademlia/query/get_record.rs @@ -0,0 +1,613 @@ +// Copyright 2023 litep2p developers +// +// Permission is hereby granted, free of charge, to any person obtaining a +// copy of this software and associated documentation files (the "Software"), +// to deal in the Software without restriction, including without limitation +// the rights to use, copy, modify, merge, publish, distribute, sublicense, +// and/or sell copies of the Software, and to permit persons to whom the +// Software is furnished to do so, subject to the following conditions: +// +// The above copyright notice and this permission notice shall be included in +// all copies or substantial portions of the Software. +// +// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS +// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE +// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER +// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING +// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER +// DEALINGS IN THE SOFTWARE. + +use bytes::Bytes; + +use crate::{ + protocol::libp2p::kademlia::{ + message::KademliaMessage, + query::{QueryAction, QueryId}, + record::{Key as RecordKey, PeerRecord, Record}, + types::{Distance, KademliaPeer, Key}, + Quorum, + }, + PeerId, +}; + +use std::collections::{BTreeMap, HashMap, HashSet, VecDeque}; + +/// Logging target for the file. +const LOG_TARGET: &str = "litep2p::ipfs::kademlia::query::get_record"; + +/// The configuration needed to instantiate a new [`GetRecordContext`]. +#[derive(Debug)] +pub struct GetRecordConfig { + /// Local peer ID. + pub local_peer_id: PeerId, + + /// How many records we already know about (ie extracted from storage). + /// + /// This can either be 0 or 1 when the record is extracted local storage. + pub known_records: usize, + + /// Quorum for the query. + pub quorum: Quorum, + + /// Replication factor. + pub replication_factor: usize, + + /// Parallelism factor. + pub parallelism_factor: usize, + + /// Query ID. + pub query: QueryId, + + /// Target key. + pub target: Key, +} + +impl GetRecordConfig { + /// Checks if the found number of records meets the specified quorum. + /// + /// Used to determine if the query found enough records to stop. + fn sufficient_records(&self, records: usize) -> bool { + // The total number of known records is the sum of the records we knew about before starting + // the query and the records we found along the way. + let total_known = self.known_records + records; + + match self.quorum { + Quorum::All => total_known >= self.replication_factor, + Quorum::One => total_known >= 1, + Quorum::N(needed_responses) => total_known >= needed_responses.get(), + } + } +} + +#[derive(Debug)] +pub struct GetRecordContext { + /// Query immutable config. + pub config: GetRecordConfig, + + /// Cached Kademlia message to send. + kad_message: Bytes, + + /// Peers from whom the `QueryEngine` is waiting to hear a response. + pub pending: HashMap, + + /// Queried candidates. + /// + /// These are the peers for whom the query has already been sent + /// and who have either returned their closest peers or failed to answer. + pub queried: HashSet, + + /// Candidates. + pub candidates: BTreeMap, + + /// Number of found records. + pub found_records: usize, + + /// Records to propagate as next query action. + pub records: VecDeque, +} + +impl GetRecordContext { + /// Create new [`GetRecordContext`]. + pub fn new( + config: GetRecordConfig, + in_peers: VecDeque, + local_record: bool, + ) -> Self { + let mut candidates = BTreeMap::new(); + + for candidate in &in_peers { + let distance = config.target.distance(&candidate.key); + candidates.insert(distance, candidate.clone()); + } + + let kad_message = KademliaMessage::get_record(config.target.clone().into_preimage()); + + Self { + config, + kad_message, + + candidates, + pending: HashMap::new(), + queried: HashSet::new(), + found_records: if local_record { 1 } else { 0 }, + records: VecDeque::new(), + } + } + + /// Register response failure for `peer`. + pub fn register_response_failure(&mut self, peer: PeerId) { + let Some(peer) = self.pending.remove(&peer) else { + tracing::debug!( + target: LOG_TARGET, + query = ?self.config.query, + ?peer, + "`GetRecordContext`: pending peer doesn't exist", + ); + return; + }; + + self.queried.insert(peer.peer); + } + + /// Register `GET_VALUE` response from `peer`. + /// + /// Returns some if the response should be propagated to the user. + pub fn register_response( + &mut self, + peer: PeerId, + record: Option, + peers: Vec, + ) { + tracing::trace!( + target: LOG_TARGET, + query = ?self.config.query, + ?peer, + "`GetRecordContext`: received response from peer", + ); + + let Some(peer) = self.pending.remove(&peer) else { + tracing::debug!( + target: LOG_TARGET, + query = ?self.config.query, + ?peer, + "`GetRecordContext`: received response from peer but didn't expect it", + ); + return; + }; + + if let Some(record) = record { + if !record.is_expired(std::time::Instant::now()) { + self.records.push_back(PeerRecord { + peer: peer.peer, + record, + }); + + self.found_records += 1; + } + } + + // Add the queried peer to `queried` and all new peers which haven't been + // queried to `candidates` + self.queried.insert(peer.peer); + + let to_query_candidate = peers.into_iter().filter_map(|peer| { + // Peer already produced a response. + if self.queried.contains(&peer.peer) { + return None; + } + + // Peer was queried, awaiting response. + if self.pending.contains_key(&peer.peer) { + return None; + } + + // Local node. + if self.config.local_peer_id == peer.peer { + return None; + } + + Some(peer) + }); + + for candidate in to_query_candidate { + let distance = self.config.target.distance(&candidate.key); + self.candidates.insert(distance, candidate); + } + } + + /// Register a failure of sending a `GET_VALUE` request to `peer`. + pub fn register_send_failure(&mut self, _peer: PeerId) { + // In case of a send failure, `register_response_failure` is called as well. + // Failure is handled there. + } + + /// Register a success of sending a `GET_VALUE` request to `peer`. + pub fn register_send_success(&mut self, _peer: PeerId) { + // `GET_VALUE` requests are compound request-response pairs of messages, + // so we handle final success/failure in `register_response`/`register_response_failure`. + } + + /// Get next action for `peer`. + // TODO: https://github.com/paritytech/litep2p/issues/40 remove this and store the next action to `PeerAction` + pub fn next_peer_action(&mut self, peer: &PeerId) -> Option { + self.pending.contains_key(peer).then_some(QueryAction::SendMessage { + query: self.config.query, + peer: *peer, + message: self.kad_message.clone(), + }) + } + + /// Schedule next peer for outbound `GET_VALUE` query. + fn schedule_next_peer(&mut self) -> Option { + tracing::trace!( + target: LOG_TARGET, + query = ?self.config.query, + "`GetRecordContext`: get next peer", + ); + + let (_, candidate) = self.candidates.pop_first()?; + let peer = candidate.peer; + + tracing::trace!( + target: LOG_TARGET, + query = ?self.config.query, + ?peer, + "`GetRecordContext`: current candidate", + ); + self.pending.insert(candidate.peer, candidate); + + Some(QueryAction::SendMessage { + query: self.config.query, + peer, + message: self.kad_message.clone(), + }) + } + + /// Check if the query cannot make any progress. + /// + /// Returns true when there are no pending responses and no candidates to query. + fn is_done(&self) -> bool { + self.pending.is_empty() && self.candidates.is_empty() + } + + /// Get next action for a `GET_VALUE` query. + pub fn next_action(&mut self) -> Option { + // Drain the records first. + if let Some(record) = self.records.pop_front() { + return Some(QueryAction::GetRecordPartialResult { + query_id: self.config.query, + record, + }); + } + + // These are the records we knew about before starting the query and + // the records we found along the way. + let known_records = self.config.known_records + self.found_records; + + // If we cannot make progress, return the final result. + // A query failed when we are not able to identify one single record. + if self.is_done() { + return if known_records == 0 { + Some(QueryAction::QueryFailed { + query: self.config.query, + }) + } else { + Some(QueryAction::QuerySucceeded { + query: self.config.query, + }) + }; + } + + // Check if enough records have been found + let sufficient_records = self.config.sufficient_records(self.found_records); + if sufficient_records { + return Some(QueryAction::QuerySucceeded { + query: self.config.query, + }); + } + + // At this point, we either have pending responses or candidates to query; and we need more + // records. Ensure we do not exceed the parallelism factor. + if self.pending.len() == self.config.parallelism_factor { + return None; + } + + self.schedule_next_peer() + } +} + +#[cfg(test)] +mod tests { + use super::*; + use crate::protocol::libp2p::kademlia::types::ConnectionType; + + fn default_config() -> GetRecordConfig { + GetRecordConfig { + local_peer_id: PeerId::random(), + quorum: Quorum::All, + known_records: 0, + replication_factor: 20, + parallelism_factor: 10, + query: QueryId(0), + target: Key::new(vec![1, 2, 3].into()), + } + } + + fn peer_to_kad(peer: PeerId) -> KademliaPeer { + KademliaPeer { + peer, + key: Key::from(peer), + address_store: Default::default(), + connection: ConnectionType::Connected, + } + } + + #[test] + fn config_check() { + // Quorum::All with no known records. + let config = GetRecordConfig { + quorum: Quorum::All, + known_records: 0, + replication_factor: 20, + ..default_config() + }; + assert!(config.sufficient_records(20)); + assert!(!config.sufficient_records(19)); + + // Quorum::All with 1 known records. + let config = GetRecordConfig { + quorum: Quorum::All, + known_records: 1, + replication_factor: 20, + ..default_config() + }; + assert!(config.sufficient_records(19)); + assert!(!config.sufficient_records(18)); + + // Quorum::One with no known records. + let config = GetRecordConfig { + quorum: Quorum::One, + known_records: 0, + ..default_config() + }; + assert!(config.sufficient_records(1)); + assert!(!config.sufficient_records(0)); + + // Quorum::One with known records. + let config = GetRecordConfig { + quorum: Quorum::One, + known_records: 1, + ..default_config() + }; + assert!(config.sufficient_records(1)); + assert!(config.sufficient_records(0)); + + // Quorum::N with no known records. + let config = GetRecordConfig { + quorum: Quorum::N(std::num::NonZeroUsize::new(10).expect("valid; qed")), + known_records: 0, + ..default_config() + }; + assert!(config.sufficient_records(10)); + assert!(!config.sufficient_records(9)); + + // Quorum::N with known records. + let config = GetRecordConfig { + quorum: Quorum::N(std::num::NonZeroUsize::new(10).expect("valid; qed")), + known_records: 1, + ..default_config() + }; + assert!(config.sufficient_records(9)); + assert!(!config.sufficient_records(8)); + } + + #[test] + fn completes_when_no_candidates() { + let config = default_config(); + let mut context = GetRecordContext::new(config, VecDeque::new(), false); + assert!(context.is_done()); + let event = context.next_action().unwrap(); + match event { + QueryAction::QueryFailed { query } => { + assert_eq!(query, QueryId(0)); + } + _ => panic!("Unexpected event"), + } + + let config = GetRecordConfig { + known_records: 1, + ..default_config() + }; + let mut context = GetRecordContext::new(config, VecDeque::new(), false); + assert!(context.is_done()); + let event = context.next_action().unwrap(); + match event { + QueryAction::QuerySucceeded { query } => { + assert_eq!(query, QueryId(0)); + } + _ => panic!("Unexpected event"), + } + } + + #[test] + fn fulfill_parallelism() { + let config = GetRecordConfig { + parallelism_factor: 3, + ..default_config() + }; + + let in_peers_set: HashSet<_> = + [PeerId::random(), PeerId::random(), PeerId::random()].into_iter().collect(); + assert_eq!(in_peers_set.len(), 3); + + let in_peers = in_peers_set.iter().map(|peer| peer_to_kad(*peer)).collect(); + let mut context = GetRecordContext::new(config, in_peers, false); + + for num in 0..3 { + let event = context.next_action().unwrap(); + match event { + QueryAction::SendMessage { query, peer, .. } => { + assert_eq!(query, QueryId(0)); + // Added as pending. + assert_eq!(context.pending.len(), num + 1); + assert!(context.pending.contains_key(&peer)); + + // Check the peer is the one provided. + assert!(in_peers_set.contains(&peer)); + } + _ => panic!("Unexpected event"), + } + } + + // Fulfilled parallelism. + assert!(context.next_action().is_none()); + } + + #[test] + fn completes_when_responses() { + let key = vec![1, 2, 3]; + let config = GetRecordConfig { + parallelism_factor: 3, + replication_factor: 3, + ..default_config() + }; + + let peer_a = PeerId::random(); + let peer_b = PeerId::random(); + let peer_c = PeerId::random(); + + let in_peers_set: HashSet<_> = [peer_a, peer_b, peer_c].into_iter().collect(); + assert_eq!(in_peers_set.len(), 3); + + let in_peers = [peer_a, peer_b, peer_c].iter().map(|peer| peer_to_kad(*peer)).collect(); + let mut context = GetRecordContext::new(config, in_peers, false); + + // Schedule peer queries. + for num in 0..3 { + let event = context.next_action().unwrap(); + match event { + QueryAction::SendMessage { query, peer, .. } => { + assert_eq!(query, QueryId(0)); + // Added as pending. + assert_eq!(context.pending.len(), num + 1); + assert!(context.pending.contains_key(&peer)); + + // Check the peer is the one provided. + assert!(in_peers_set.contains(&peer)); + } + _ => panic!("Unexpected event"), + } + } + + // Checks a failed query that was not initiated. + let peer_d = PeerId::random(); + context.register_response_failure(peer_d); + assert_eq!(context.pending.len(), 3); + assert!(context.queried.is_empty()); + + let mut found_records = Vec::new(); + // Provide responses back. + let record = Record::new(key.clone(), vec![1, 2, 3]); + context.register_response(peer_a, Some(record), vec![]); + // Check propagated action. + let record = context.next_action().unwrap(); + match record { + QueryAction::GetRecordPartialResult { query_id, record } => { + assert_eq!(query_id, QueryId(0)); + assert_eq!(record.peer, peer_a); + assert_eq!(record.record, Record::new(key.clone(), vec![1, 2, 3])); + + found_records.push(record); + } + _ => panic!("Unexpected event"), + } + + assert_eq!(context.pending.len(), 2); + assert_eq!(context.queried.len(), 1); + assert_eq!(context.found_records, 1); + + // Provide different response from peer b with peer d as candidate. + let record = Record::new(key.clone(), vec![4, 5, 6]); + context.register_response(peer_b, Some(record), vec![peer_to_kad(peer_d)]); + // Check propagated action. + let record = context.next_action().unwrap(); + match record { + QueryAction::GetRecordPartialResult { query_id, record } => { + assert_eq!(query_id, QueryId(0)); + assert_eq!(record.peer, peer_b); + assert_eq!(record.record, Record::new(key.clone(), vec![4, 5, 6])); + + found_records.push(record); + } + _ => panic!("Unexpected event"), + } + + assert_eq!(context.pending.len(), 1); + assert_eq!(context.queried.len(), 2); + assert_eq!(context.found_records, 2); + assert_eq!(context.candidates.len(), 1); + + // Peer C fails. + context.register_response_failure(peer_c); + assert!(context.pending.is_empty()); + assert_eq!(context.queried.len(), 3); + assert_eq!(context.found_records, 2); + + // Drain the last candidate. + let event = context.next_action().unwrap(); + match event { + QueryAction::SendMessage { query, peer, .. } => { + assert_eq!(query, QueryId(0)); + // Added as pending. + assert_eq!(context.pending.len(), 1); + assert_eq!(peer, peer_d); + } + _ => panic!("Unexpected event"), + } + + // Peer D responds. + let record = Record::new(key.clone(), vec![4, 5, 6]); + context.register_response(peer_d, Some(record), vec![]); + // Check propagated action. + let record = context.next_action().unwrap(); + match record { + QueryAction::GetRecordPartialResult { query_id, record } => { + assert_eq!(query_id, QueryId(0)); + assert_eq!(record.peer, peer_d); + assert_eq!(record.record, Record::new(key.clone(), vec![4, 5, 6])); + + found_records.push(record); + } + _ => panic!("Unexpected event"), + } + + // Produces the result. + let event = context.next_action().unwrap(); + match event { + QueryAction::QuerySucceeded { query } => { + assert_eq!(query, QueryId(0)); + } + _ => panic!("Unexpected event"), + } + + // Check results. + assert_eq!( + found_records, + vec![ + PeerRecord { + peer: peer_a, + record: Record::new(key.clone(), vec![1, 2, 3]), + }, + PeerRecord { + peer: peer_b, + record: Record::new(key.clone(), vec![4, 5, 6]), + }, + PeerRecord { + peer: peer_d, + record: Record::new(key.clone(), vec![4, 5, 6]), + }, + ] + ); + } +} diff --git a/client/litep2p/src/protocol/libp2p/kademlia/query/mod.rs b/client/litep2p/src/protocol/libp2p/kademlia/query/mod.rs new file mode 100644 index 00000000..bf1e887c --- /dev/null +++ b/client/litep2p/src/protocol/libp2p/kademlia/query/mod.rs @@ -0,0 +1,2145 @@ +// Copyright 2023 litep2p developers +// +// Permission is hereby granted, free of charge, to any person obtaining a +// copy of this software and associated documentation files (the "Software"), +// to deal in the Software without restriction, including without limitation +// the rights to use, copy, modify, merge, publish, distribute, sublicense, +// and/or sell copies of the Software, and to permit persons to whom the +// Software is furnished to do so, subject to the following conditions: +// +// The above copyright notice and this permission notice shall be included in +// all copies or substantial portions of the Software. +// +// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS +// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE +// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER +// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING +// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER +// DEALINGS IN THE SOFTWARE. + +use crate::{ + protocol::libp2p::kademlia::{ + message::KademliaMessage, + query::{ + find_node::{FindNodeConfig, FindNodeContext}, + get_providers::{GetProvidersConfig, GetProvidersContext}, + get_record::{GetRecordConfig, GetRecordContext}, + }, + record::{ContentProvider, Key as RecordKey, Record}, + types::{KademliaPeer, Key}, + PeerRecord, Quorum, + }, + PeerId, +}; + +use bytes::Bytes; + +use std::collections::{HashMap, VecDeque}; + +use self::{find_many_nodes::FindManyNodesContext, target_peers::PutToTargetPeersContext}; + +mod find_many_nodes; +mod find_node; +mod get_providers; +mod get_record; +mod target_peers; + +/// Logging target for the file. +const LOG_TARGET: &str = "litep2p::ipfs::kademlia::query"; + +/// Type representing a query ID. +#[derive(Debug, Copy, Clone, Hash, PartialEq, Eq)] +#[cfg_attr(feature = "fuzz", derive(serde::Serialize, serde::Deserialize))] +pub struct QueryId(pub usize); + +/// Query type. +#[derive(Debug)] +enum QueryType { + /// `FIND_NODE` query. + FindNode { + /// Context for the `FIND_NODE` query. + context: FindNodeContext, + }, + + /// `PUT_VALUE` query. + PutRecord { + /// Record that needs to be stored. + record: Record, + + /// [`Quorum`] that needs to be reached for the query to succeed. + quorum: Quorum, + + /// Context for the `FIND_NODE` query. + context: FindNodeContext, + }, + + /// `PUT_VALUE` query to specified peers. + PutRecordToPeers { + /// Record that needs to be stored. + record: Record, + + /// [`Quorum`] that needs to be reached for the query to succeed. + quorum: Quorum, + + /// Context for finding peers. + context: FindManyNodesContext, + }, + + /// `PUT_VALUE` message sending phase. + PutRecordToFoundNodes { + /// Context for tracking `PUT_VALUE` responses. + context: PutToTargetPeersContext, + }, + + /// `GET_VALUE` query. + GetRecord { + /// Context for the `GET_VALUE` query. + context: GetRecordContext, + }, + + /// `ADD_PROVIDER` query. + AddProvider { + /// Provided key. + provided_key: RecordKey, + + /// Provider record that need to be stored. + provider: ContentProvider, + + /// [`Quorum`] that needs to be reached for the query to succeed. + quorum: Quorum, + + /// Context for the `FIND_NODE` query. + context: FindNodeContext, + }, + + /// `ADD_PROVIDER` message sending phase. + AddProviderToFoundNodes { + /// Context for tracking `ADD_PROVIDER` requests. + context: PutToTargetPeersContext, + }, + + /// `GET_PROVIDERS` query. + GetProviders { + /// Context for the `GET_PROVIDERS` query. + context: GetProvidersContext, + }, +} + +/// Query action. +#[derive(Debug)] +pub enum QueryAction { + /// Send message to peer. + SendMessage { + /// Query ID. + query: QueryId, + + /// Peer. + peer: PeerId, + + /// Message. + message: Bytes, + }, + + /// `FIND_NODE` query succeeded. + FindNodeQuerySucceeded { + /// ID of the query that succeeded. + query: QueryId, + + /// Target peer. + target: PeerId, + + /// Peers that were found. + peers: Vec, + }, + + /// Store the record to nodes closest to target key. + PutRecordToFoundNodes { + /// Query ID of the original PUT_RECORD request. + query: QueryId, + + /// Record to store. + record: Record, + + /// Peers for whom the `PUT_VALUE` must be sent to. + peers: Vec, + + /// [`Quorum`] that needs to be reached for the query to succeed. + quorum: Quorum, + }, + + /// `PUT_VALUE` query succeeded. + PutRecordQuerySucceeded { + /// ID of the query that succeeded. + query: QueryId, + + /// Record key of the stored record. + key: RecordKey, + }, + + /// Add the provider record to nodes closest to the target key. + AddProviderToFoundNodes { + /// Query ID of the original ADD_PROVIDER request. + query: QueryId, + + /// Provided key. + provided_key: RecordKey, + + /// Provider record. + provider: ContentProvider, + + /// Peers for whom the `ADD_PROVIDER` must be sent to. + peers: Vec, + + /// [`Quorum`] that needs to be reached for the query to succeed. + quorum: Quorum, + }, + + /// `ADD_PROVIDER` query succeeded. + AddProviderQuerySucceeded { + /// ID of the query that succeeded. + query: QueryId, + + /// Provided key. + provided_key: RecordKey, + }, + + /// `GET_VALUE` query succeeded. + GetRecordQueryDone { + /// Query ID. + query_id: QueryId, + }, + + /// `GET_VALUE` inflight query produced a result. + /// + /// This event is emitted when a peer responds to the query with a record. + GetRecordPartialResult { + /// Query ID. + query_id: QueryId, + + /// Found record. + record: PeerRecord, + }, + + /// `GET_PROVIDERS` query succeeded. + GetProvidersQueryDone { + /// Query ID. + query_id: QueryId, + + /// Provided key. + provided_key: RecordKey, + + /// Found providers. + providers: Vec, + }, + + /// Query succeeded. + QuerySucceeded { + /// ID of the query that succeeded. + query: QueryId, + }, + + /// Query failed. + QueryFailed { + /// ID of the query that failed. + query: QueryId, + }, +} + +/// Kademlia query engine. +pub struct QueryEngine { + /// Local peer ID. + local_peer_id: PeerId, + + /// Replication factor. + replication_factor: usize, + + /// Parallelism factor. + parallelism_factor: usize, + + /// Active queries. + queries: HashMap, +} + +impl QueryEngine { + /// Create new [`QueryEngine`]. + pub fn new( + local_peer_id: PeerId, + replication_factor: usize, + parallelism_factor: usize, + ) -> Self { + Self { + local_peer_id, + replication_factor, + parallelism_factor, + queries: HashMap::new(), + } + } + + /// Start `FIND_NODE` query. + pub fn start_find_node( + &mut self, + query_id: QueryId, + target: PeerId, + candidates: VecDeque, + ) -> QueryId { + tracing::debug!( + target: LOG_TARGET, + ?query_id, + ?target, + num_peers = ?candidates.len(), + "start `FIND_NODE` query" + ); + + let target = Key::from(target); + let config = FindNodeConfig { + local_peer_id: self.local_peer_id, + replication_factor: self.replication_factor, + parallelism_factor: self.parallelism_factor, + query: query_id, + target, + }; + + self.queries.insert( + query_id, + QueryType::FindNode { + context: FindNodeContext::new(config, candidates), + }, + ); + + query_id + } + + /// Start `PUT_VALUE` query. + pub fn start_put_record( + &mut self, + query_id: QueryId, + record: Record, + candidates: VecDeque, + quorum: Quorum, + ) -> QueryId { + tracing::debug!( + target: LOG_TARGET, + ?query_id, + target = ?record.key, + num_peers = ?candidates.len(), + "start `PUT_VALUE` query" + ); + + let target = Key::new(record.key.clone()); + let config = FindNodeConfig { + local_peer_id: self.local_peer_id, + replication_factor: self.replication_factor, + parallelism_factor: self.parallelism_factor, + query: query_id, + target, + }; + + self.queries.insert( + query_id, + QueryType::PutRecord { + record, + quorum, + context: FindNodeContext::new(config, candidates), + }, + ); + + query_id + } + + /// Start `PUT_VALUE` query to specified peers. + pub fn start_put_record_to_peers( + &mut self, + query_id: QueryId, + record: Record, + peers_to_report: Vec, + quorum: Quorum, + ) -> QueryId { + tracing::debug!( + target: LOG_TARGET, + ?query_id, + target = ?record.key, + num_peers = ?peers_to_report.len(), + "start `PUT_VALUE` query to peers" + ); + + self.queries.insert( + query_id, + QueryType::PutRecordToPeers { + record, + quorum, + context: FindManyNodesContext::new(query_id, peers_to_report), + }, + ); + + query_id + } + + /// Start `GET_VALUE` query. + pub fn start_get_record( + &mut self, + query_id: QueryId, + target: RecordKey, + candidates: VecDeque, + quorum: Quorum, + local_record: bool, + ) -> QueryId { + tracing::debug!( + target: LOG_TARGET, + ?query_id, + ?target, + num_peers = ?candidates.len(), + "start `GET_VALUE` query" + ); + + let target = Key::new(target); + let config = GetRecordConfig { + local_peer_id: self.local_peer_id, + known_records: if local_record { 1 } else { 0 }, + quorum, + replication_factor: self.replication_factor, + parallelism_factor: self.parallelism_factor, + query: query_id, + target, + }; + + self.queries.insert( + query_id, + QueryType::GetRecord { + context: GetRecordContext::new(config, candidates, local_record), + }, + ); + + query_id + } + + /// Start `ADD_PROVIDER` query. + pub fn start_add_provider( + &mut self, + query_id: QueryId, + provided_key: RecordKey, + provider: ContentProvider, + candidates: VecDeque, + quorum: Quorum, + ) -> QueryId { + tracing::debug!( + target: LOG_TARGET, + ?query_id, + ?provider, + num_peers = ?candidates.len(), + "start `ADD_PROVIDER` query", + ); + + let config = FindNodeConfig { + local_peer_id: self.local_peer_id, + replication_factor: self.replication_factor, + parallelism_factor: self.parallelism_factor, + query: query_id, + target: Key::new(provided_key.clone()), + }; + + self.queries.insert( + query_id, + QueryType::AddProvider { + provided_key, + provider, + quorum, + context: FindNodeContext::new(config, candidates), + }, + ); + + query_id + } + + /// Start `GET_PROVIDERS` query. + pub fn start_get_providers( + &mut self, + query_id: QueryId, + key: RecordKey, + candidates: VecDeque, + known_providers: Vec, + ) -> QueryId { + tracing::debug!( + target: LOG_TARGET, + ?query_id, + ?key, + num_peers = ?candidates.len(), + "start `GET_PROVIDERS` query", + ); + + let target = Key::new(key); + let config = GetProvidersConfig { + local_peer_id: self.local_peer_id, + parallelism_factor: self.parallelism_factor, + query: query_id, + target, + known_providers: known_providers.into_iter().map(Into::into).collect(), + }; + + self.queries.insert( + query_id, + QueryType::GetProviders { + context: GetProvidersContext::new(config, candidates), + }, + ); + + query_id + } + + /// Start `PUT_VALUE` requests tracking. + pub fn start_put_record_to_found_nodes_requests_tracking( + &mut self, + query_id: QueryId, + key: RecordKey, + peers: Vec, + quorum: Quorum, + ) { + tracing::debug!( + target: LOG_TARGET, + ?query_id, + num_peers = ?peers.len(), + "start `PUT_VALUE` responses tracking" + ); + + self.queries.insert( + query_id, + QueryType::PutRecordToFoundNodes { + context: PutToTargetPeersContext::new(query_id, key, peers, quorum), + }, + ); + } + + /// Start `ADD_PROVIDER` requests tracking. + pub fn start_add_provider_to_found_nodes_requests_tracking( + &mut self, + query_id: QueryId, + provided_key: RecordKey, + peers: Vec, + quorum: Quorum, + ) { + tracing::debug!( + target: LOG_TARGET, + ?query_id, + num_peers = ?peers.len(), + "start `ADD_PROVIDER` progress tracking" + ); + + self.queries.insert( + query_id, + QueryType::AddProviderToFoundNodes { + context: PutToTargetPeersContext::new(query_id, provided_key, peers, quorum), + }, + ); + } + + /// Register response failure from a queried peer. + pub fn register_response_failure(&mut self, query: QueryId, peer: PeerId) { + tracing::trace!(target: LOG_TARGET, ?query, ?peer, "register response failure"); + + match self.queries.get_mut(&query) { + None => { + tracing::trace!(target: LOG_TARGET, ?query, ?peer, "response failure for a stale query"); + } + Some(QueryType::FindNode { context }) => { + context.register_response_failure(peer); + } + Some(QueryType::PutRecord { context, .. }) => { + context.register_response_failure(peer); + } + Some(QueryType::PutRecordToPeers { context, .. }) => { + context.register_response_failure(peer); + } + Some(QueryType::PutRecordToFoundNodes { context }) => { + context.register_response_failure(peer); + } + Some(QueryType::GetRecord { context }) => { + context.register_response_failure(peer); + } + Some(QueryType::AddProvider { context, .. }) => { + context.register_response_failure(peer); + } + Some(QueryType::AddProviderToFoundNodes { context }) => { + context.register_response_failure(peer); + } + Some(QueryType::GetProviders { context }) => { + context.register_response_failure(peer); + } + } + } + + /// Register that `response` received from `peer`. + pub fn register_response(&mut self, query: QueryId, peer: PeerId, message: KademliaMessage) { + tracing::trace!(target: LOG_TARGET, ?query, ?peer, "register response"); + + match self.queries.get_mut(&query) { + None => { + tracing::trace!(target: LOG_TARGET, ?query, ?peer, "response for a stale query"); + } + Some(QueryType::FindNode { context }) => match message { + KademliaMessage::FindNode { peers, .. } => { + context.register_response(peer, peers); + } + message => { + tracing::debug!( + target: LOG_TARGET, + ?query, + ?peer, + "unexpected response to `FIND_NODE`: {message}", + ); + context.register_response_failure(peer); + } + }, + Some(QueryType::PutRecord { context, .. }) => match message { + KademliaMessage::FindNode { peers, .. } => { + context.register_response(peer, peers); + } + message => { + tracing::debug!( + target: LOG_TARGET, + ?query, + ?peer, + "unexpected response to `FIND_NODE` during `PUT_VALUE` query: {message}", + ); + context.register_response_failure(peer); + } + }, + Some(QueryType::PutRecordToPeers { context, .. }) => match message { + KademliaMessage::FindNode { peers, .. } => { + context.register_response(peer, peers); + } + message => { + tracing::debug!( + target: LOG_TARGET, + ?query, + ?peer, + "unexpected response to `FIND_NODE` during `PUT_VALUE` (to peers): {message}", + ); + context.register_response_failure(peer); + } + }, + Some(QueryType::PutRecordToFoundNodes { context }) => match message { + KademliaMessage::PutValue { .. } => { + context.register_response(peer); + } + message => { + tracing::debug!( + target: LOG_TARGET, + ?query, + ?peer, + "unexpected response to `PUT_VALUE`: {message}", + ); + context.register_response_failure(peer); + } + }, + Some(QueryType::GetRecord { context }) => match message { + KademliaMessage::GetRecord { record, peers, .. } => + context.register_response(peer, record, peers), + message => { + tracing::debug!( + target: LOG_TARGET, + ?query, + ?peer, + "unexpected response to `GET_VALUE`: {message}", + ); + context.register_response_failure(peer); + } + }, + Some(QueryType::AddProvider { context, .. }) => match message { + KademliaMessage::FindNode { peers, .. } => { + context.register_response(peer, peers); + } + message => { + tracing::debug!( + target: LOG_TARGET, + ?query, + ?peer, + "unexpected response to `FIND_NODE` during `ADD_PROVIDER` query: {message}", + ); + context.register_response_failure(peer); + } + }, + Some(QueryType::AddProviderToFoundNodes { context, .. }) => match message { + KademliaMessage::AddProvider { .. } => { + context.register_response(peer); + } + message => { + tracing::debug!( + target: LOG_TARGET, + ?query, + ?peer, + "unexpected response to `ADD_PROVIDER`: {message}", + ); + context.register_response_failure(peer); + } + }, + Some(QueryType::GetProviders { context }) => match message { + KademliaMessage::GetProviders { + key: _, + providers, + peers, + } => { + context.register_response(peer, providers, peers); + } + message => { + tracing::debug!( + target: LOG_TARGET, + ?query, + ?peer, + "unexpected response to `GET_PROVIDERS`: {message}", + ); + context.register_response_failure(peer); + } + }, + } + } + + pub fn register_send_failure(&mut self, query: QueryId, peer: PeerId) { + tracing::trace!(target: LOG_TARGET, ?query, ?peer, "register send failure"); + + match self.queries.get_mut(&query) { + None => { + tracing::trace!(target: LOG_TARGET, ?query, ?peer, "send failure for a stale query"); + } + Some(QueryType::FindNode { context }) => { + context.register_send_failure(peer); + } + Some(QueryType::PutRecord { context, .. }) => { + context.register_send_failure(peer); + } + Some(QueryType::PutRecordToPeers { context, .. }) => { + context.register_send_failure(peer); + } + Some(QueryType::PutRecordToFoundNodes { context }) => { + context.register_send_failure(peer); + } + Some(QueryType::GetRecord { context }) => { + context.register_send_failure(peer); + } + Some(QueryType::AddProvider { context, .. }) => { + context.register_send_failure(peer); + } + Some(QueryType::AddProviderToFoundNodes { context }) => { + context.register_send_failure(peer); + } + Some(QueryType::GetProviders { context }) => { + context.register_send_failure(peer); + } + } + } + + pub fn register_send_success(&mut self, query: QueryId, peer: PeerId) { + tracing::trace!(target: LOG_TARGET, ?query, ?peer, "register send success"); + + match self.queries.get_mut(&query) { + None => { + tracing::trace!(target: LOG_TARGET, ?query, ?peer, "send success for a stale query"); + } + Some(QueryType::FindNode { context }) => { + context.register_send_success(peer); + } + Some(QueryType::PutRecord { context, .. }) => { + context.register_send_success(peer); + } + Some(QueryType::PutRecordToPeers { context, .. }) => { + context.register_send_success(peer); + } + Some(QueryType::PutRecordToFoundNodes { context, .. }) => { + context.register_send_success(peer); + } + Some(QueryType::GetRecord { context }) => { + context.register_send_success(peer); + } + Some(QueryType::AddProvider { context, .. }) => { + context.register_send_success(peer); + } + Some(QueryType::AddProviderToFoundNodes { context, .. }) => { + context.register_send_success(peer); + } + Some(QueryType::GetProviders { context }) => { + context.register_send_success(peer); + } + } + } + + /// Register peer failure when it is not known whether sending or receiveiing failed. + /// This is called from [`super::Kademlia::disconnect_peer`]. + pub fn register_peer_failure(&mut self, query: QueryId, peer: PeerId) { + tracing::trace!(target: LOG_TARGET, ?query, ?peer, "register peer failure"); + + // Because currently queries track either send success/failure (`PUT_VALUE`, `ADD_PROVIDER`) + // or response success/failure (`FIND_NODE`, `GET_VALUE`, `GET_PROVIDERS`), + // but not both, we can just call both here and not propagate this different type of + // failure to specific queries knowing this will result in the correct behaviour. + self.register_send_failure(query, peer); + self.register_response_failure(query, peer); + } + + /// Get next action for `peer` from the [`QueryEngine`]. + pub fn next_peer_action(&mut self, query: &QueryId, peer: &PeerId) -> Option { + tracing::trace!(target: LOG_TARGET, ?query, ?peer, "get next peer action"); + + match self.queries.get_mut(query) { + None => { + tracing::trace!(target: LOG_TARGET, ?query, ?peer, "response failure for a stale query"); + None + } + Some(QueryType::FindNode { context }) => context.next_peer_action(peer), + Some(QueryType::PutRecord { context, .. }) => context.next_peer_action(peer), + Some(QueryType::PutRecordToPeers { context, .. }) => context.next_peer_action(peer), + Some(QueryType::GetRecord { context }) => context.next_peer_action(peer), + Some(QueryType::AddProvider { context, .. }) => context.next_peer_action(peer), + Some(QueryType::GetProviders { context }) => context.next_peer_action(peer), + Some(QueryType::PutRecordToFoundNodes { .. }) => { + // All `PUT_VALUE` requests were sent when initiating this query type. + None + } + Some(QueryType::AddProviderToFoundNodes { .. }) => { + // All `ADD_PROVIDER` requests were sent when initiating this query type. + None + } + } + } + + /// Handle query success by returning the queried value(s) + /// and removing the query from [`QueryEngine`]. + fn on_query_succeeded(&mut self, query: QueryId) -> QueryAction { + match self.queries.remove(&query).expect("query to exist") { + QueryType::FindNode { context } => QueryAction::FindNodeQuerySucceeded { + query, + target: context.config.target.into_preimage(), + peers: context.responses.into_values().collect::>(), + }, + QueryType::PutRecord { + record, + quorum, + context, + } => QueryAction::PutRecordToFoundNodes { + query: context.config.query, + record, + peers: context.responses.into_values().collect::>(), + quorum, + }, + QueryType::PutRecordToPeers { + record, + quorum, + context, + } => QueryAction::PutRecordToFoundNodes { + query: context.query, + record, + peers: context.peers_to_report, + quorum, + }, + QueryType::PutRecordToFoundNodes { context } => QueryAction::PutRecordQuerySucceeded { + query: context.query, + key: context.key, + }, + QueryType::GetRecord { context } => QueryAction::GetRecordQueryDone { + query_id: context.config.query, + }, + QueryType::AddProvider { + provided_key, + provider, + quorum, + context, + } => QueryAction::AddProviderToFoundNodes { + query: context.config.query, + provided_key, + provider, + peers: context.responses.into_values().collect::>(), + quorum, + }, + QueryType::AddProviderToFoundNodes { context } => + QueryAction::AddProviderQuerySucceeded { + query: context.query, + provided_key: context.key, + }, + QueryType::GetProviders { context } => QueryAction::GetProvidersQueryDone { + query_id: context.config.query, + provided_key: context.config.target.clone().into_preimage(), + providers: context.found_providers(), + }, + } + } + + /// Handle query failure by removing the query from [`QueryEngine`] and + /// returning the appropriate [`QueryAction`] to user. + fn on_query_failed(&mut self, query: QueryId) -> QueryAction { + let _ = self.queries.remove(&query).expect("query to exist"); + + QueryAction::QueryFailed { query } + } + + /// Get next action from the [`QueryEngine`]. + pub fn next_action(&mut self) -> Option { + for (_, state) in self.queries.iter_mut() { + let action = match state { + QueryType::FindNode { context } => context.next_action(), + QueryType::PutRecord { context, .. } => context.next_action(), + QueryType::PutRecordToPeers { context, .. } => context.next_action(), + QueryType::GetRecord { context } => context.next_action(), + QueryType::AddProvider { context, .. } => context.next_action(), + QueryType::GetProviders { context } => context.next_action(), + QueryType::PutRecordToFoundNodes { context, .. } => context.next_action(), + QueryType::AddProviderToFoundNodes { context, .. } => context.next_action(), + }; + + match action { + Some(QueryAction::QuerySucceeded { query }) => { + return Some(self.on_query_succeeded(query)); + } + Some(QueryAction::QueryFailed { query }) => + return Some(self.on_query_failed(query)), + Some(_) => return action, + _ => continue, + } + } + + None + } +} + +#[cfg(test)] +mod tests { + use multihash::{Code, Multihash}; + + use super::*; + use crate::protocol::libp2p::kademlia::types::ConnectionType; + + // make fixed peer id + fn make_peer_id(first: u8, second: u8) -> PeerId { + let mut peer_id = vec![0u8; 32]; + peer_id[0] = first; + peer_id[1] = second; + + PeerId::from_bytes( + &Multihash::wrap(Code::Identity.into(), &peer_id) + .expect("The digest size is never too large") + .to_bytes(), + ) + .unwrap() + } + + #[test] + fn find_node_query_fails() { + let _ = tracing_subscriber::fmt() + .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) + .try_init(); + + let mut engine = QueryEngine::new(PeerId::random(), 20usize, 3usize); + let target_peer = PeerId::random(); + let _target_key = Key::from(target_peer); + + let query = engine.start_find_node( + QueryId(1337), + target_peer, + vec![ + KademliaPeer::new(PeerId::random(), vec![], ConnectionType::NotConnected), + KademliaPeer::new(PeerId::random(), vec![], ConnectionType::NotConnected), + KademliaPeer::new(PeerId::random(), vec![], ConnectionType::NotConnected), + KademliaPeer::new(PeerId::random(), vec![], ConnectionType::NotConnected), + ] + .into(), + ); + + for _ in 0..4 { + if let Some(QueryAction::SendMessage { query, peer, .. }) = engine.next_action() { + engine.register_response_failure(query, peer); + } + } + + if let Some(QueryAction::QueryFailed { query: failed }) = engine.next_action() { + assert_eq!(failed, query); + } + + assert!(engine.next_action().is_none()); + } + + #[test] + fn find_node_lookup_paused() { + let mut engine = QueryEngine::new(PeerId::random(), 20usize, 3usize); + let target_peer = PeerId::random(); + let _target_key = Key::from(target_peer); + + let _ = engine.start_find_node( + QueryId(1338), + target_peer, + vec![ + KademliaPeer::new(PeerId::random(), vec![], ConnectionType::NotConnected), + KademliaPeer::new(PeerId::random(), vec![], ConnectionType::NotConnected), + KademliaPeer::new(PeerId::random(), vec![], ConnectionType::NotConnected), + KademliaPeer::new(PeerId::random(), vec![], ConnectionType::NotConnected), + ] + .into(), + ); + + for _ in 0..3 { + let _ = engine.next_action(); + } + + assert!(engine.next_action().is_none()); + } + + #[test] + fn find_node_query_succeeds() { + let _ = tracing_subscriber::fmt() + .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) + .try_init(); + + let mut engine = QueryEngine::new(PeerId::random(), 20usize, 3usize); + let target_peer = make_peer_id(0, 0); + let target_key = Key::from(target_peer); + + let distances = { + let mut distances = std::collections::BTreeMap::new(); + + for i in 1..64 { + let peer = make_peer_id(i, 0); + let key = Key::from(peer); + + distances.insert(target_key.distance(&key), peer); + } + + distances + }; + let mut iter = distances.iter(); + + // start find node with one known peer + let _query = engine.start_find_node( + QueryId(1339), + target_peer, + vec![KademliaPeer::new( + *iter.next().unwrap().1, + vec![], + ConnectionType::NotConnected, + )] + .into(), + ); + + let action = engine.next_action(); + assert!(engine.next_action().is_none()); + + // the one known peer responds with 3 other peers it knows + match action { + Some(QueryAction::SendMessage { query, peer, .. }) => { + engine.register_response( + query, + peer, + KademliaMessage::FindNode { + target: Vec::new(), + peers: vec![ + KademliaPeer::new( + *iter.next().unwrap().1, + vec![], + ConnectionType::NotConnected, + ), + KademliaPeer::new( + *iter.next().unwrap().1, + vec![], + ConnectionType::NotConnected, + ), + KademliaPeer::new( + *iter.next().unwrap().1, + vec![], + ConnectionType::NotConnected, + ), + ], + }, + ); + } + _ => panic!("invalid event received"), + } + + // send empty response for the last three nodes + for _ in 0..3 { + match engine.next_action() { + Some(QueryAction::SendMessage { query, peer, .. }) => { + println!("next send message to {peer:?}"); + engine.register_response( + query, + peer, + KademliaMessage::FindNode { + target: Vec::new(), + peers: vec![], + }, + ); + } + _ => panic!("invalid event received"), + } + } + + match engine.next_action() { + Some(QueryAction::FindNodeQuerySucceeded { peers, .. }) => { + assert_eq!(peers.len(), 4); + } + _ => panic!("invalid event received"), + } + + assert!(engine.next_action().is_none()); + } + + #[test] + fn put_record_fails() { + let _ = tracing_subscriber::fmt() + .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) + .try_init(); + + let mut engine = QueryEngine::new(PeerId::random(), 20usize, 3usize); + let record_key = RecordKey::new(&vec![1, 2, 3, 4]); + let target_key = Key::new(record_key.clone()); + let original_record = Record::new(record_key.clone(), vec![1, 3, 3, 7, 1, 3, 3, 8]); + + let distances = { + let mut distances = std::collections::BTreeMap::new(); + + for i in 1..64 { + let peer = make_peer_id(i, 0); + let key = Key::from(peer); + + distances.insert(target_key.distance(&key), peer); + } + + distances + }; + let mut iter = distances.iter(); + + // start find node with one known peer + let original_query_id = QueryId(1340); + let _query = engine.start_put_record( + original_query_id, + original_record.clone(), + vec![KademliaPeer::new( + *iter.next().unwrap().1, + vec![], + ConnectionType::NotConnected, + )] + .into(), + Quorum::All, + ); + + let action = engine.next_action(); + assert!(engine.next_action().is_none()); + + // the one known peer responds with 3 other peers it knows + match action { + Some(QueryAction::SendMessage { query, peer, .. }) => { + engine.register_response( + query, + peer, + KademliaMessage::FindNode { + target: Vec::new(), + peers: vec![ + KademliaPeer::new( + *iter.next().unwrap().1, + vec![], + ConnectionType::NotConnected, + ), + KademliaPeer::new( + *iter.next().unwrap().1, + vec![], + ConnectionType::NotConnected, + ), + KademliaPeer::new( + *iter.next().unwrap().1, + vec![], + ConnectionType::NotConnected, + ), + ], + }, + ); + } + _ => panic!("invalid event received"), + } + + // send empty response for the last three nodes + for _ in 0..3 { + match engine.next_action() { + Some(QueryAction::SendMessage { query, peer, .. }) => { + println!("next send message to {peer:?}"); + engine.register_response( + query, + peer, + KademliaMessage::FindNode { + target: Vec::new(), + peers: vec![], + }, + ); + } + _ => panic!("invalid event received"), + } + } + + let mut peers = match engine.next_action() { + Some(QueryAction::PutRecordToFoundNodes { + query, + peers, + record, + quorum, + }) => { + assert_eq!(query, original_query_id); + assert_eq!(peers.len(), 4); + assert_eq!(record.key, original_record.key); + assert_eq!(record.value, original_record.value); + assert!(matches!(quorum, Quorum::All)); + + peers + } + _ => panic!("invalid event received"), + }; + + engine.start_put_record_to_found_nodes_requests_tracking( + original_query_id, + record_key.clone(), + peers.iter().map(|p| p.peer).collect(), + Quorum::All, + ); + + // sends to all but one peer succeed + let last_peer = peers.pop().unwrap(); + for peer in peers { + engine.register_send_success(original_query_id, peer.peer); + } + engine.register_send_failure(original_query_id, last_peer.peer); + + match engine.next_action() { + Some(QueryAction::QueryFailed { query }) => { + assert_eq!(query, original_query_id); + } + _ => panic!("invalid event received"), + } + + assert!(engine.next_action().is_none()); + } + + #[test] + fn put_record_succeeds() { + let _ = tracing_subscriber::fmt() + .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) + .try_init(); + + let mut engine = QueryEngine::new(PeerId::random(), 20usize, 3usize); + let record_key = RecordKey::new(&vec![1, 2, 3, 4]); + let target_key = Key::new(record_key.clone()); + let original_record = Record::new(record_key.clone(), vec![1, 3, 3, 7, 1, 3, 3, 8]); + + let distances = { + let mut distances = std::collections::BTreeMap::new(); + + for i in 1..64 { + let peer = make_peer_id(i, 0); + let key = Key::from(peer); + + distances.insert(target_key.distance(&key), peer); + } + + distances + }; + let mut iter = distances.iter(); + + // start find node with one known peer + let original_query_id = QueryId(1340); + let _query = engine.start_put_record( + original_query_id, + original_record.clone(), + vec![KademliaPeer::new( + *iter.next().unwrap().1, + vec![], + ConnectionType::NotConnected, + )] + .into(), + Quorum::All, + ); + + let action = engine.next_action(); + assert!(engine.next_action().is_none()); + + // the one known peer responds with 3 other peers it knows + match action { + Some(QueryAction::SendMessage { query, peer, .. }) => { + engine.register_response( + query, + peer, + KademliaMessage::FindNode { + target: Vec::new(), + peers: vec![ + KademliaPeer::new( + *iter.next().unwrap().1, + vec![], + ConnectionType::NotConnected, + ), + KademliaPeer::new( + *iter.next().unwrap().1, + vec![], + ConnectionType::NotConnected, + ), + KademliaPeer::new( + *iter.next().unwrap().1, + vec![], + ConnectionType::NotConnected, + ), + ], + }, + ); + } + _ => panic!("invalid event received"), + } + + // send empty response for the last three nodes + for _ in 0..3 { + match engine.next_action() { + Some(QueryAction::SendMessage { query, peer, .. }) => { + println!("next send message to {peer:?}"); + engine.register_response( + query, + peer, + KademliaMessage::FindNode { + target: Vec::new(), + peers: vec![], + }, + ); + } + _ => panic!("invalid event received"), + } + } + + let peers = match engine.next_action() { + Some(QueryAction::PutRecordToFoundNodes { + query, + peers, + record, + quorum, + }) => { + assert_eq!(query, original_query_id); + assert_eq!(peers.len(), 4); + assert_eq!(record.key, original_record.key); + assert_eq!(record.value, original_record.value); + assert!(matches!(quorum, Quorum::All)); + + peers + } + _ => panic!("invalid event received"), + }; + + engine.start_put_record_to_found_nodes_requests_tracking( + original_query_id, + record_key.clone(), + peers.iter().map(|p| p.peer).collect(), + Quorum::All, + ); + + // simulate successful sends to all peers + for peer in &peers { + engine.register_send_success(original_query_id, peer.peer); + } + + match engine.next_action() { + Some(QueryAction::PutRecordQuerySucceeded { query, key }) => { + assert_eq!(query, original_query_id); + assert_eq!(key, record_key); + } + _ => panic!("invalid event received"), + } + + assert!(engine.next_action().is_none()); + + // get records from those peers. + let _query = engine.start_get_record( + QueryId(1341), + record_key.clone(), + vec![ + KademliaPeer::new(peers[0].peer, vec![], ConnectionType::NotConnected), + KademliaPeer::new(peers[1].peer, vec![], ConnectionType::NotConnected), + KademliaPeer::new(peers[2].peer, vec![], ConnectionType::NotConnected), + KademliaPeer::new(peers[3].peer, vec![], ConnectionType::NotConnected), + ] + .into(), + Quorum::All, + false, + ); + + let mut records = Vec::new(); + for _ in 0..4 { + match engine.next_action() { + Some(QueryAction::SendMessage { query, peer, .. }) => { + assert_eq!(query, QueryId(1341)); + engine.register_response( + query, + peer, + KademliaMessage::GetRecord { + record: Some(original_record.clone()), + peers: vec![], + key: Some(record_key.clone()), + }, + ); + } + event => panic!("invalid event received {:?}", event), + } + + // GetRecordPartialResult is emitted after the `register_response` if the record is + // valid. + match engine.next_action() { + Some(QueryAction::GetRecordPartialResult { query_id, record }) => { + println!("Partial result {:?}", record); + assert_eq!(query_id, QueryId(1341)); + records.push(record); + } + event => panic!("invalid event received {:?}", event), + } + } + + let peers: std::collections::HashSet<_> = peers.into_iter().map(|p| p.peer).collect(); + match engine.next_action() { + Some(QueryAction::GetRecordQueryDone { .. }) => { + println!("Records {:?}", records); + let query_peers = records + .iter() + .map(|peer_record| peer_record.peer) + .collect::>(); + assert_eq!(peers, query_peers); + + let records: std::collections::HashSet<_> = + records.into_iter().map(|peer_record| peer_record.record).collect(); + // One single record found across peers. + assert_eq!(records.len(), 1); + let record = records.into_iter().next().unwrap(); + + assert_eq!(record.key, original_record.key); + assert_eq!(record.value, original_record.value); + } + event => panic!("invalid event received {:?}", event), + } + } + + #[test] + fn put_record_succeeds_with_quorum_one() { + let _ = tracing_subscriber::fmt() + .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) + .try_init(); + + let mut engine = QueryEngine::new(PeerId::random(), 20usize, 3usize); + let record_key = RecordKey::new(&vec![1, 2, 3, 4]); + let target_key = Key::new(record_key.clone()); + let original_record = Record::new(record_key.clone(), vec![1, 3, 3, 7, 1, 3, 3, 8]); + + let distances = { + let mut distances = std::collections::BTreeMap::new(); + + for i in 1..64 { + let peer = make_peer_id(i, 0); + let key = Key::from(peer); + + distances.insert(target_key.distance(&key), peer); + } + + distances + }; + let mut iter = distances.iter(); + + // start find node with one known peer + let original_query_id = QueryId(1340); + let _query = engine.start_put_record( + original_query_id, + original_record.clone(), + vec![KademliaPeer::new( + *iter.next().unwrap().1, + vec![], + ConnectionType::NotConnected, + )] + .into(), + Quorum::One, + ); + + let action = engine.next_action(); + assert!(engine.next_action().is_none()); + + // the one known peer responds with 3 other peers it knows + match action { + Some(QueryAction::SendMessage { query, peer, .. }) => { + engine.register_response( + query, + peer, + KademliaMessage::FindNode { + target: Vec::new(), + peers: vec![ + KademliaPeer::new( + *iter.next().unwrap().1, + vec![], + ConnectionType::NotConnected, + ), + KademliaPeer::new( + *iter.next().unwrap().1, + vec![], + ConnectionType::NotConnected, + ), + KademliaPeer::new( + *iter.next().unwrap().1, + vec![], + ConnectionType::NotConnected, + ), + ], + }, + ); + } + _ => panic!("invalid event received"), + } + + // send empty response for the last three nodes + for _ in 0..3 { + match engine.next_action() { + Some(QueryAction::SendMessage { query, peer, .. }) => { + println!("next send message to {peer:?}"); + engine.register_response( + query, + peer, + KademliaMessage::FindNode { + target: Vec::new(), + peers: vec![], + }, + ); + } + _ => panic!("invalid event received"), + } + } + + let peers = match engine.next_action() { + Some(QueryAction::PutRecordToFoundNodes { + query, + peers, + record, + quorum, + }) => { + assert_eq!(query, original_query_id); + assert_eq!(peers.len(), 4); + assert_eq!(record.key, original_record.key); + assert_eq!(record.value, original_record.value); + assert!(matches!(quorum, Quorum::One)); + + peers + } + _ => panic!("invalid event received"), + }; + + engine.start_put_record_to_found_nodes_requests_tracking( + original_query_id, + record_key.clone(), + peers.iter().map(|p| p.peer).collect(), + Quorum::One, + ); + + // all but one peer fail + assert!(peers.len() > 1); + for peer in peers.iter().take(peers.len() - 1) { + engine.register_send_failure(original_query_id, peer.peer); + } + engine.register_send_success(original_query_id, peers.last().unwrap().peer); + + match engine.next_action() { + Some(QueryAction::PutRecordQuerySucceeded { query, key }) => { + assert_eq!(query, original_query_id); + assert_eq!(key, record_key); + } + _ => panic!("invalid event received"), + } + + assert!(engine.next_action().is_none()); + + // get records from those peers. + let _query = engine.start_get_record( + QueryId(1341), + record_key.clone(), + vec![ + KademliaPeer::new(peers[0].peer, vec![], ConnectionType::NotConnected), + KademliaPeer::new(peers[1].peer, vec![], ConnectionType::NotConnected), + KademliaPeer::new(peers[2].peer, vec![], ConnectionType::NotConnected), + KademliaPeer::new(peers[3].peer, vec![], ConnectionType::NotConnected), + ] + .into(), + Quorum::All, + false, + ); + + let mut records = Vec::new(); + for _ in 0..4 { + match engine.next_action() { + Some(QueryAction::SendMessage { query, peer, .. }) => { + assert_eq!(query, QueryId(1341)); + engine.register_response( + query, + peer, + KademliaMessage::GetRecord { + record: Some(original_record.clone()), + peers: vec![], + key: Some(record_key.clone()), + }, + ); + } + event => panic!("invalid event received {:?}", event), + } + + // GetRecordPartialResult is emitted after the `register_response` if the record is + // valid. + match engine.next_action() { + Some(QueryAction::GetRecordPartialResult { query_id, record }) => { + println!("Partial result {:?}", record); + assert_eq!(query_id, QueryId(1341)); + records.push(record); + } + event => panic!("invalid event received {:?}", event), + } + } + + let peers: std::collections::HashSet<_> = peers.into_iter().map(|p| p.peer).collect(); + match engine.next_action() { + Some(QueryAction::GetRecordQueryDone { .. }) => { + println!("Records {:?}", records); + let query_peers = records + .iter() + .map(|peer_record| peer_record.peer) + .collect::>(); + assert_eq!(peers, query_peers); + + let records: std::collections::HashSet<_> = + records.into_iter().map(|peer_record| peer_record.record).collect(); + // One single record found across peers. + assert_eq!(records.len(), 1); + let record = records.into_iter().next().unwrap(); + + assert_eq!(record.key, original_record.key); + assert_eq!(record.value, original_record.value); + } + event => panic!("invalid event received {:?}", event), + } + } + + #[test] + fn add_provider_fails() { + let _ = tracing_subscriber::fmt() + .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) + .try_init(); + + let local_peer_id = PeerId::random(); + let mut engine = QueryEngine::new(local_peer_id, 20usize, 3usize); + let original_provided_key = RecordKey::new(&vec![1, 2, 3, 4]); + let local_content_provider = ContentProvider { + peer: local_peer_id, + addresses: vec![], + }; + let target_key = Key::new(original_provided_key.clone()); + + let distances = { + let mut distances = std::collections::BTreeMap::new(); + + for i in 1..64 { + let peer = make_peer_id(i, 0); + let key = Key::from(peer); + + distances.insert(target_key.distance(&key), peer); + } + + distances + }; + let mut iter = distances.iter(); + + // start add provider with one known peer + let original_query_id = QueryId(1340); + let _query = engine.start_add_provider( + original_query_id, + original_provided_key.clone(), + local_content_provider.clone(), + vec![KademliaPeer::new( + *iter.next().unwrap().1, + vec![], + ConnectionType::NotConnected, + )] + .into(), + Quorum::All, + ); + + let action = engine.next_action(); + assert!(engine.next_action().is_none()); + + // the one known peer responds with 3 other peers it knows + match action { + Some(QueryAction::SendMessage { query, peer, .. }) => { + engine.register_response( + query, + peer, + KademliaMessage::FindNode { + target: Vec::new(), + peers: vec![ + KademliaPeer::new( + *iter.next().unwrap().1, + vec![], + ConnectionType::NotConnected, + ), + KademliaPeer::new( + *iter.next().unwrap().1, + vec![], + ConnectionType::NotConnected, + ), + KademliaPeer::new( + *iter.next().unwrap().1, + vec![], + ConnectionType::NotConnected, + ), + ], + }, + ); + } + _ => panic!("invalid event received"), + } + + // send empty response for the last three nodes + for _ in 0..3 { + match engine.next_action() { + Some(QueryAction::SendMessage { query, peer, .. }) => { + println!("next send message to {peer:?}"); + engine.register_response( + query, + peer, + KademliaMessage::FindNode { + target: Vec::new(), + peers: vec![], + }, + ); + } + _ => panic!("invalid event received"), + } + } + + let mut peers = match engine.next_action() { + Some(QueryAction::AddProviderToFoundNodes { + query, + provided_key, + provider, + peers, + quorum, + }) => { + assert_eq!(query, original_query_id); + assert_eq!(provided_key, original_provided_key); + assert_eq!(provider, local_content_provider); + assert_eq!(peers.len(), 4); + assert!(matches!(quorum, Quorum::All)); + + peers + } + _ => panic!("invalid event received"), + }; + + engine.start_add_provider_to_found_nodes_requests_tracking( + original_query_id, + original_provided_key.clone(), + peers.iter().map(|p| p.peer).collect(), + Quorum::All, + ); + + // sends to all but one peer succeed + let last_peer = peers.pop().unwrap(); + for peer in peers { + engine.register_send_success(original_query_id, peer.peer); + } + engine.register_send_failure(original_query_id, last_peer.peer); + + match engine.next_action() { + Some(QueryAction::QueryFailed { query }) => { + assert_eq!(query, original_query_id); + } + _ => panic!("invalid event received"), + } + + assert!(engine.next_action().is_none()); + } + + #[test] + fn add_provider_succeeds() { + let _ = tracing_subscriber::fmt() + .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) + .try_init(); + + let local_peer_id = PeerId::random(); + let mut engine = QueryEngine::new(local_peer_id, 20usize, 3usize); + let original_provided_key = RecordKey::new(&vec![1, 2, 3, 4]); + let local_content_provider = ContentProvider { + peer: local_peer_id, + addresses: vec![], + }; + + let target_key = Key::new(original_provided_key.clone()); + let distances = { + let mut distances = std::collections::BTreeMap::new(); + + for i in 1..64 { + let peer = make_peer_id(i, 0); + let key = Key::from(peer); + + distances.insert(target_key.distance(&key), peer); + } + + distances + }; + let mut iter = distances.iter(); + + // start add provider with one known peer + let add_query_id = QueryId(1340); + let _query = engine.start_add_provider( + add_query_id, + original_provided_key.clone(), + local_content_provider.clone(), + vec![KademliaPeer::new( + *iter.next().unwrap().1, + vec![], + ConnectionType::NotConnected, + )] + .into(), + Quorum::All, + ); + + let action = engine.next_action(); + assert!(engine.next_action().is_none()); + + // the one known peer responds with 3 other peers it knows + match action { + Some(QueryAction::SendMessage { query, peer, .. }) => { + engine.register_response( + query, + peer, + KademliaMessage::FindNode { + target: Vec::new(), + peers: vec![ + KademliaPeer::new( + *iter.next().unwrap().1, + vec![], + ConnectionType::NotConnected, + ), + KademliaPeer::new( + *iter.next().unwrap().1, + vec![], + ConnectionType::NotConnected, + ), + KademliaPeer::new( + *iter.next().unwrap().1, + vec![], + ConnectionType::NotConnected, + ), + ], + }, + ); + } + _ => panic!("invalid event received"), + } + + // send empty response for the last three nodes + for _ in 0..3 { + match engine.next_action() { + Some(QueryAction::SendMessage { query, peer, .. }) => { + println!("next send message to {peer:?}"); + engine.register_response( + query, + peer, + KademliaMessage::FindNode { + target: Vec::new(), + peers: vec![], + }, + ); + } + _ => panic!("invalid event received"), + } + } + + let peers = match engine.next_action() { + Some(QueryAction::AddProviderToFoundNodes { + query, + provided_key, + provider, + peers, + quorum, + }) => { + assert_eq!(query, add_query_id); + assert_eq!(provided_key, original_provided_key); + assert_eq!(provider, local_content_provider); + assert_eq!(peers.len(), 4); + assert!(matches!(quorum, Quorum::All)); + + peers + } + _ => panic!("invalid event received"), + }; + + engine.start_add_provider_to_found_nodes_requests_tracking( + add_query_id, + original_provided_key.clone(), + peers.iter().map(|p| p.peer).collect(), + Quorum::All, + ); + + // simulate successful sends to all peers + for peer in &peers { + engine.register_send_success(add_query_id, peer.peer); + } + + match engine.next_action() { + Some(QueryAction::AddProviderQuerySucceeded { + query, + provided_key, + }) => { + assert_eq!(query, add_query_id); + assert_eq!(provided_key, original_provided_key); + } + _ => panic!("invalid event received"), + } + + assert!(engine.next_action().is_none()); + + // get providers from those peers. + let get_query_id = QueryId(1341); + let _query = engine.start_get_providers( + get_query_id, + original_provided_key.clone(), + vec![ + KademliaPeer::new(peers[0].peer, vec![], ConnectionType::NotConnected), + KademliaPeer::new(peers[1].peer, vec![], ConnectionType::NotConnected), + KademliaPeer::new(peers[2].peer, vec![], ConnectionType::NotConnected), + KademliaPeer::new(peers[3].peer, vec![], ConnectionType::NotConnected), + ] + .into(), + vec![], + ); + + for _ in 0..4 { + match engine.next_action() { + Some(QueryAction::SendMessage { query, peer, .. }) => { + assert_eq!(query, get_query_id); + engine.register_response( + query, + peer, + KademliaMessage::GetProviders { + key: Some(original_provided_key.clone()), + peers: vec![], + providers: vec![local_content_provider.clone().into()], + }, + ); + } + event => panic!("invalid event received {:?}", event), + } + } + + match engine.next_action() { + Some(QueryAction::GetProvidersQueryDone { + query_id, + provided_key, + providers, + }) => { + assert_eq!(query_id, get_query_id); + assert_eq!(provided_key, original_provided_key); + assert_eq!(providers, vec![local_content_provider]); + } + event => panic!("invalid event received {:?}", event), + } + } + + #[test] + fn add_provider_succeeds_with_quorum_one() { + let _ = tracing_subscriber::fmt() + .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) + .try_init(); + + let local_peer_id = PeerId::random(); + let mut engine = QueryEngine::new(local_peer_id, 20usize, 3usize); + let original_provided_key = RecordKey::new(&vec![1, 2, 3, 4]); + let local_content_provider = ContentProvider { + peer: local_peer_id, + addresses: vec![], + }; + + let target_key = Key::new(original_provided_key.clone()); + let distances = { + let mut distances = std::collections::BTreeMap::new(); + + for i in 1..64 { + let peer = make_peer_id(i, 0); + let key = Key::from(peer); + + distances.insert(target_key.distance(&key), peer); + } + + distances + }; + let mut iter = distances.iter(); + + // start add provider with one known peer + let add_query_id = QueryId(1340); + let _query = engine.start_add_provider( + add_query_id, + original_provided_key.clone(), + local_content_provider.clone(), + vec![KademliaPeer::new( + *iter.next().unwrap().1, + vec![], + ConnectionType::NotConnected, + )] + .into(), + Quorum::One, + ); + + let action = engine.next_action(); + assert!(engine.next_action().is_none()); + + // the one known peer responds with 3 other peers it knows + match action { + Some(QueryAction::SendMessage { query, peer, .. }) => { + engine.register_response( + query, + peer, + KademliaMessage::FindNode { + target: Vec::new(), + peers: vec![ + KademliaPeer::new( + *iter.next().unwrap().1, + vec![], + ConnectionType::NotConnected, + ), + KademliaPeer::new( + *iter.next().unwrap().1, + vec![], + ConnectionType::NotConnected, + ), + KademliaPeer::new( + *iter.next().unwrap().1, + vec![], + ConnectionType::NotConnected, + ), + ], + }, + ); + } + _ => panic!("invalid event received"), + } + + // send empty response for the last three nodes + for _ in 0..3 { + match engine.next_action() { + Some(QueryAction::SendMessage { query, peer, .. }) => { + println!("next send message to {peer:?}"); + engine.register_response( + query, + peer, + KademliaMessage::FindNode { + target: Vec::new(), + peers: vec![], + }, + ); + } + _ => panic!("invalid event received"), + } + } + + let peers = match engine.next_action() { + Some(QueryAction::AddProviderToFoundNodes { + query, + provided_key, + provider, + peers, + quorum, + }) => { + assert_eq!(query, add_query_id); + assert_eq!(provided_key, original_provided_key); + assert_eq!(provider, local_content_provider); + assert_eq!(peers.len(), 4); + assert!(matches!(quorum, Quorum::One)); + + peers + } + _ => panic!("invalid event received"), + }; + + engine.start_add_provider_to_found_nodes_requests_tracking( + add_query_id, + original_provided_key.clone(), + peers.iter().map(|p| p.peer).collect(), + Quorum::One, + ); + + // all but one peer fail + assert!(peers.len() > 1); + engine.register_send_success(add_query_id, peers.first().unwrap().peer); + for peer in peers.iter().skip(1) { + engine.register_send_failure(add_query_id, peer.peer); + } + + match engine.next_action() { + Some(QueryAction::AddProviderQuerySucceeded { + query, + provided_key, + }) => { + assert_eq!(query, add_query_id); + assert_eq!(provided_key, original_provided_key); + } + _ => panic!("invalid event received"), + } + + assert!(engine.next_action().is_none()); + + // get providers from those peers. + let get_query_id = QueryId(1341); + let _query = engine.start_get_providers( + get_query_id, + original_provided_key.clone(), + vec![ + KademliaPeer::new(peers[0].peer, vec![], ConnectionType::NotConnected), + KademliaPeer::new(peers[1].peer, vec![], ConnectionType::NotConnected), + KademliaPeer::new(peers[2].peer, vec![], ConnectionType::NotConnected), + KademliaPeer::new(peers[3].peer, vec![], ConnectionType::NotConnected), + ] + .into(), + vec![], + ); + + // first peer responds with the provider + match engine.next_action() { + Some(QueryAction::SendMessage { query, peer, .. }) => { + assert_eq!(query, get_query_id); + engine.register_response( + query, + peer, + KademliaMessage::GetProviders { + key: Some(original_provided_key.clone()), + peers: vec![], + providers: vec![local_content_provider.clone().into()], + }, + ); + } + event => panic!("invalid event received {:?}", event), + } + + // other peers respond with no providers + for _ in 1..4 { + match engine.next_action() { + Some(QueryAction::SendMessage { query, peer, .. }) => { + assert_eq!(query, get_query_id); + engine.register_response( + query, + peer, + KademliaMessage::GetProviders { + key: Some(original_provided_key.clone()), + peers: vec![], + providers: vec![], + }, + ); + } + event => panic!("invalid event received {:?}", event), + } + } + + match engine.next_action() { + Some(QueryAction::GetProvidersQueryDone { + query_id, + provided_key, + providers, + }) => { + assert_eq!(query_id, get_query_id); + assert_eq!(provided_key, original_provided_key); + assert_eq!(providers, vec![local_content_provider]); + } + event => panic!("invalid event received {:?}", event), + } + } +} diff --git a/client/litep2p/src/protocol/libp2p/kademlia/query/put_record.rs b/client/litep2p/src/protocol/libp2p/kademlia/query/put_record.rs new file mode 100644 index 00000000..1c9c9e06 --- /dev/null +++ b/client/litep2p/src/protocol/libp2p/kademlia/query/put_record.rs @@ -0,0 +1,130 @@ +// Copyright 2025 litep2p developers +// +// Permission is hereby granted, free of charge, to any person obtaining a +// copy of this software and associated documentation files (the "Software"), +// to deal in the Software without restriction, including without limitation +// the rights to use, copy, modify, merge, publish, distribute, sublicense, +// and/or sell copies of the Software, and to permit persons to whom the +// Software is furnished to do so, subject to the following conditions: +// +// The above copyright notice and this permission notice shall be included in +// all copies or substantial portions of the Software. +// +// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS +// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE +// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER +// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING +// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER +// DEALINGS IN THE SOFTWARE. +use crate::{ + protocol::libp2p::kademlia::{handle::Quorum, query::QueryAction, QueryId, RecordKey}, + PeerId, +}; + +use std::{cmp, collections::HashSet}; + +/// Logging target for this file. +const LOG_TARGET: &str = "litep2p::ipfs::kademlia::query::put_record"; + +/// Context for tracking `PUT_VALUE` responses from peers. +#[derive(Debug)] +pub struct PutRecordToFoundNodesContext { + /// Query ID. + pub query: QueryId, + + /// Record key. + pub key: RecordKey, + + /// Quorum that needs to be reached for the query to succeed. + peers_to_succeed: usize, + + /// Peers we're waiting for responses from. + pending_peers: HashSet, + + /// Number of successfully responded peers. + n_succeeded: usize, +} + +impl PutRecordToFoundNodesContext { + /// Create new [`PutRecordToFoundNodesContext`]. + pub fn new(query: QueryId, key: RecordKey, peers: Vec, quorum: Quorum) -> Self { + Self { + query, + key, + peers_to_succeed: match quorum { + Quorum::One => 1, + // Clamp by the number of discovered peers. This should ever be relevant on + // small networks with fewer peers than the replication factor. Without such + // clamping the query would always fail in small testnets. + Quorum::N(n) => cmp::min(n.get(), cmp::max(peers.len(), 1)), + Quorum::All => cmp::max(peers.len(), 1), + }, + pending_peers: peers.into_iter().collect(), + n_succeeded: 0, + } + } + + /// Register successful response from peer. + pub fn register_response(&mut self, peer: PeerId) { + if self.pending_peers.remove(&peer) { + self.n_succeeded += 1; + + tracing::trace!( + target: LOG_TARGET, + query = ?self.query, + ?peer, + "successful `PUT_VALUE` to peer", + ); + } else { + tracing::debug!( + target: LOG_TARGET, + query = ?self.query, + ?peer, + "`PutRecordToFoundNodesContext::register_response`: pending peer does not exist", + ); + } + } + + /// Register failed response from peer. + pub fn register_response_failure(&mut self, peer: PeerId) { + if self.pending_peers.remove(&peer) { + tracing::trace!( + target: LOG_TARGET, + query = ?self.query, + ?peer, + "failed `PUT_VALUE` to peer", + ); + } else { + tracing::debug!( + target: LOG_TARGET, + query = ?self.query, + ?peer, + "`PutRecordToFoundNodesContext::register_response_failure`: pending peer does not exist", + ); + } + } + + /// Check if all responses have been received. + pub fn is_finished(&self) -> bool { + self.pending_peers.is_empty() + } + + /// Check if all requests were successful. + pub fn is_succeded(&self) -> bool { + self.n_succeeded >= self.peers_to_succeed + } + + /// Get next action if the context is finished. + pub fn next_action(&self) -> Option { + if self.is_finished() { + if self.is_succeded() { + Some(QueryAction::QuerySucceeded { query: self.query }) + } else { + Some(QueryAction::QueryFailed { query: self.query }) + } + } else { + None + } + } +} diff --git a/client/litep2p/src/protocol/libp2p/kademlia/query/target_peers.rs b/client/litep2p/src/protocol/libp2p/kademlia/query/target_peers.rs new file mode 100644 index 00000000..964aca4a --- /dev/null +++ b/client/litep2p/src/protocol/libp2p/kademlia/query/target_peers.rs @@ -0,0 +1,149 @@ +// Copyright 2025 litep2p developers +// +// Permission is hereby granted, free of charge, to any person obtaining a +// copy of this software and associated documentation files (the "Software"), +// to deal in the Software without restriction, including without limitation +// the rights to use, copy, modify, merge, publish, distribute, sublicense, +// and/or sell copies of the Software, and to permit persons to whom the +// Software is furnished to do so, subject to the following conditions: +// +// The above copyright notice and this permission notice shall be included in +// all copies or substantial portions of the Software. +// +// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS +// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE +// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER +// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING +// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER +// DEALINGS IN THE SOFTWARE. +use crate::{ + protocol::libp2p::kademlia::{handle::Quorum, query::QueryAction, QueryId, RecordKey}, + PeerId, +}; + +use std::{cmp, collections::HashSet}; + +/// Logging target for this file. +const LOG_TARGET: &str = "litep2p::ipfs::kademlia::query::target_peers"; + +/// Context for tracking `PUT_VALUE`/`ADD_PROVIDER` requests to peers. +#[derive(Debug)] +pub struct PutToTargetPeersContext { + /// Query ID. + pub query: QueryId, + + /// Record/provider key. + pub key: RecordKey, + + /// Quorum that needs to be reached for the query to succeed. + peers_to_succeed: usize, + + /// Peers we're waiting for responses from. + pending_peers: HashSet, + + /// Number of successfully responded peers. + n_succeeded: usize, +} + +impl PutToTargetPeersContext { + /// Create new [`PutToTargetPeersContext`]. + pub fn new(query: QueryId, key: RecordKey, peers: Vec, quorum: Quorum) -> Self { + Self { + query, + key, + peers_to_succeed: match quorum { + Quorum::One => 1, + // Clamp by the number of discovered peers. This should ever be relevant on + // small networks with fewer peers than the replication factor. Without such + // clamping the query would always fail in small testnets. + Quorum::N(n) => cmp::min(n.get(), cmp::max(peers.len(), 1)), + Quorum::All => cmp::max(peers.len(), 1), + }, + pending_peers: peers.into_iter().collect(), + n_succeeded: 0, + } + } + + /// Register a success of sending a message to `peer`. + pub fn register_send_success(&mut self, peer: PeerId) { + if self.pending_peers.remove(&peer) { + self.n_succeeded += 1; + + tracing::trace!( + target: LOG_TARGET, + query = ?self.query, + ?peer, + "successful `PUT_VALUE`/`ADD_PROVIDER` to peer", + ); + } else { + tracing::debug!( + target: LOG_TARGET, + query = ?self.query, + ?peer, + "`PutToTargetPeersContext::register_response`: pending peer does not exist", + ); + } + } + + /// Register a failure of sending a message to `peer`. + pub fn register_send_failure(&mut self, peer: PeerId) { + if self.pending_peers.remove(&peer) { + tracing::trace!( + target: LOG_TARGET, + query = ?self.query, + ?peer, + "failed `PUT_VALUE`/`ADD_PROVIDER` to peer", + ); + } else { + tracing::debug!( + target: LOG_TARGET, + query = ?self.query, + ?peer, + "`PutToTargetPeersContext::register_response_failure`: pending peer does not exist", + ); + } + } + + /// Register successful response from peer. + pub fn register_response(&mut self, _peer: PeerId) { + // Currently we only track if we successfully sent the message to the peer both for + // `PUT_VALUE` and `ADD_PROVIDER`. While `PUT_VALUE` has a response message, due to litep2p + // not sending it in the past, tracking it would frequently result in reporting query + // failures. `ADD_PROVIDER` does not have a response message at all. + + // TODO: once most of the network is on a litep2p version that sends `PUT_VALUE` responses, + // we should track them. + } + + /// Register failed response from peer. + pub fn register_response_failure(&mut self, _peer: PeerId) { + // See a comment in `register_response`. + + // Also note that due to the implementation of [`QueryEngine::register_peer_failure`], only + // one of `register_response_failure` or `register_send_failure` must be implemented. + } + + /// Check if all responses have been received. + pub fn is_finished(&self) -> bool { + self.pending_peers.is_empty() + } + + /// Check if all requests were successful. + pub fn is_succeded(&self) -> bool { + self.n_succeeded >= self.peers_to_succeed + } + + /// Get next action if the context is finished. + pub fn next_action(&self) -> Option { + if self.is_finished() { + if self.is_succeded() { + Some(QueryAction::QuerySucceeded { query: self.query }) + } else { + Some(QueryAction::QueryFailed { query: self.query }) + } + } else { + None + } + } +} diff --git a/client/litep2p/src/protocol/libp2p/kademlia/record.rs b/client/litep2p/src/protocol/libp2p/kademlia/record.rs new file mode 100644 index 00000000..322553d4 --- /dev/null +++ b/client/litep2p/src/protocol/libp2p/kademlia/record.rs @@ -0,0 +1,185 @@ +// Copyright 2019 Parity Technologies (UK) Ltd. +// Copyright 2023 litep2p developers +// +// Permission is hereby granted, free of charge, to any person obtaining a +// copy of this software and associated documentation files (the "Software"), +// to deal in the Software without restriction, including without limitation +// the rights to use, copy, modify, merge, publish, distribute, sublicense, +// and/or sell copies of the Software, and to permit persons to whom the +// Software is furnished to do so, subject to the following conditions: +// +// The above copyright notice and this permission notice shall be included in +// all copies or substantial portions of the Software. +// +// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS +// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE +// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER +// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING +// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER +// DEALINGS IN THE SOFTWARE. + +use crate::{ + protocol::libp2p::kademlia::types::{ + ConnectionType, Distance, KademliaPeer, Key as KademliaKey, + }, + transport::manager::address::{AddressRecord, AddressStore}, + Multiaddr, PeerId, +}; + +use bytes::Bytes; +use multihash::Multihash; + +use std::{borrow::Borrow, time::Instant}; + +/// The (opaque) key of a record. +#[derive(Clone, Debug, PartialEq, Eq, Hash)] +#[cfg_attr(feature = "fuzz", derive(serde::Serialize, serde::Deserialize))] +pub struct Key(Bytes); + +impl Key { + /// Creates a new key from the bytes of the input. + pub fn new>(key: &K) -> Self { + Key(Bytes::copy_from_slice(key.as_ref())) + } + + /// Copies the bytes of the key into a new vector. + pub fn to_vec(&self) -> Vec { + Vec::from(&self.0[..]) + } +} + +impl From for Vec { + fn from(k: Key) -> Vec { + Vec::from(&k.0[..]) + } +} + +impl Borrow<[u8]> for Key { + fn borrow(&self) -> &[u8] { + &self.0[..] + } +} + +impl AsRef<[u8]> for Key { + fn as_ref(&self) -> &[u8] { + &self.0[..] + } +} + +impl From> for Key { + fn from(v: Vec) -> Key { + Key(Bytes::from(v)) + } +} + +impl From for Key { + fn from(m: Multihash) -> Key { + Key::from(m.to_bytes()) + } +} + +/// A record stored in the DHT. +#[derive(Clone, Debug, Eq, PartialEq, Hash)] +#[cfg_attr(feature = "fuzz", derive(serde::Serialize, serde::Deserialize))] +pub struct Record { + /// Key of the record. + pub key: Key, + + /// Value of the record. + pub value: Vec, + + /// The (original) publisher of the record. + pub publisher: Option, + + /// The expiration time as measured by a local, monotonic clock. + #[cfg_attr(feature = "fuzz", serde(with = "serde_millis"))] + pub expires: Option, +} + +impl Record { + /// Creates a new record for insertion into the DHT. + pub fn new(key: K, value: Vec) -> Self + where + K: Into, + { + Record { + key: key.into(), + value, + publisher: None, + expires: None, + } + } + + /// Checks whether the record is expired w.r.t. the given `Instant`. + pub fn is_expired(&self, now: Instant) -> bool { + self.expires.is_some_and(|t| now >= t) + } +} + +/// A record received by the given peer. +#[derive(Debug, Clone, PartialEq, Eq)] +pub struct PeerRecord { + /// The peer from whom the record was received + pub peer: PeerId, + + /// The provided record. + pub record: Record, +} + +/// A record keeping information about a content provider. +#[derive(Clone, Debug, Eq, PartialEq, Hash)] +pub struct ProviderRecord { + /// Key of the record. + pub key: Key, + + /// Key of the provider, based on its peer ID. + pub provider: PeerId, + + /// Cached addresses of the provider. + pub addresses: Vec, + + /// The expiration time of the record. The provider records must always have the expiration + /// time. + pub expires: Instant, +} + +impl ProviderRecord { + /// The distance from the provider's peer ID to the provided key. + pub fn distance(&self) -> Distance { + // Note that the record key is raw (opaque bytes). In order to calculate the distance from + // the provider's peer ID to this key we must first hash both. + KademliaKey::from(self.provider).distance(&KademliaKey::new(self.key.clone())) + } + + /// Checks whether the record is expired w.r.t. the given `Instant`. + pub fn is_expired(&self, now: Instant) -> bool { + now >= self.expires + } +} + +/// A user-facing provider type. +#[derive(Clone, Debug, Eq, PartialEq, Hash)] +pub struct ContentProvider { + // Peer ID of the provider. + pub peer: PeerId, + + // Cached addresses of the provider. + pub addresses: Vec, +} + +impl From for KademliaPeer { + fn from(provider: ContentProvider) -> Self { + let mut address_store = AddressStore::new(); + for address in provider.addresses.iter() { + address_store.insert(AddressRecord::from_raw_multiaddr(address.clone())); + } + + Self { + key: KademliaKey::from(provider.peer), + peer: provider.peer, + address_store, + connection: ConnectionType::NotConnected, + } + } +} diff --git a/client/litep2p/src/protocol/libp2p/kademlia/routing_table.rs b/client/litep2p/src/protocol/libp2p/kademlia/routing_table.rs new file mode 100644 index 00000000..e012318e --- /dev/null +++ b/client/litep2p/src/protocol/libp2p/kademlia/routing_table.rs @@ -0,0 +1,589 @@ +// Copyright 2018 Parity Technologies (UK) Ltd. +// Copyright 2023 litep2p developers +// +// Permission is hereby granted, free of charge, to any person obtaining a +// copy of this software and associated documentation files (the "Software"), +// to deal in the Software without restriction, including without limitation +// the rights to use, copy, modify, merge, publish, distribute, sublicense, +// and/or sell copies of the Software, and to permit persons to whom the +// Software is furnished to do so, subject to the following conditions: +// +// The above copyright notice and this permission notice shall be included in +// all copies or substantial portions of the Software. +// +// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS +// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE +// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER +// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING +// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER +// DEALINGS IN THE SOFTWARE. + +//! Kademlia routing table implementation. + +use crate::{ + protocol::libp2p::kademlia::{ + bucket::{KBucket, KBucketEntry}, + types::{ConnectionType, Distance, KademliaPeer, Key, U256}, + }, + transport::{ + manager::address::{scores, AddressRecord}, + Endpoint, + }, + PeerId, +}; + +use multiaddr::{Multiaddr, Protocol}; +use multihash::Multihash; + +/// Number of k-buckets. +const NUM_BUCKETS: usize = 256; + +/// Logging target for the file. +const LOG_TARGET: &str = "litep2p::ipfs::kademlia::routing_table"; + +pub struct RoutingTable { + /// Local key. + local_key: Key, + + /// K-buckets. + buckets: Vec, +} + +/// A (type-safe) index into a `KBucketsTable`, i.e. a non-negative integer in the +/// interval `[0, NUM_BUCKETS)`. +#[derive(Debug, Copy, Clone, PartialEq, Eq)] +struct BucketIndex(usize); + +impl BucketIndex { + /// Creates a new `BucketIndex` for a `Distance`. + /// + /// The given distance is interpreted as the distance from a `local_key` of + /// a `KBucketsTable`. If the distance is zero, `None` is returned, in + /// recognition of the fact that the only key with distance `0` to a + /// `local_key` is the `local_key` itself, which does not belong in any + /// bucket. + fn new(d: &Distance) -> Option { + d.ilog2().map(|i| BucketIndex(i as usize)) + } + + /// Gets the index value as an unsigned integer. + fn get(&self) -> usize { + self.0 + } + + /// Returns the minimum inclusive and maximum inclusive [`Distance`] + /// included in the bucket for this index. + fn _range(&self) -> (Distance, Distance) { + let min = Distance(U256::pow(U256::from(2), U256::from(self.0))); + if self.0 == usize::from(u8::MAX) { + (min, Distance(U256::MAX)) + } else { + let max = Distance(U256::pow(U256::from(2), U256::from(self.0 + 1)) - 1); + (min, max) + } + } + + /// Generates a random distance that falls into the bucket for this index. + #[cfg(test)] + fn rand_distance(&self, rng: &mut impl rand::Rng) -> Distance { + let mut bytes = [0u8; 32]; + let quot = self.0 / 8; + for i in 0..quot { + bytes[31 - i] = rng.gen(); + } + let rem = (self.0 % 8) as u32; + let lower = usize::pow(2, rem); + let upper = usize::pow(2, rem + 1); + bytes[31 - quot] = rng.gen_range(lower..upper) as u8; + Distance(U256::from_big_endian(&bytes)) + } +} + +impl RoutingTable { + /// Create new [`RoutingTable`]. + pub fn new(local_key: Key) -> Self { + RoutingTable { + local_key, + buckets: (0..NUM_BUCKETS).map(|_| KBucket::new()).collect(), + } + } + + /// Returns the local key. + pub fn _local_key(&self) -> &Key { + &self.local_key + } + + /// Get an entry for `peer` into a k-bucket. + pub fn entry(&mut self, key: Key) -> KBucketEntry<'_> { + let Some(index) = BucketIndex::new(&self.local_key.distance(&key)) else { + return KBucketEntry::LocalNode; + }; + + self.buckets[index.get()].entry(key) + } + + /// Update the addresses of the peer on dial failures. + /// + /// The addresses are updated with a negative score making them subject to removal. + pub fn on_dial_failure(&mut self, key: Key, addresses: &[Multiaddr]) { + tracing::trace!( + target: LOG_TARGET, + ?key, + ?addresses, + "on dial failure" + ); + + if let KBucketEntry::Occupied(entry) = self.entry(key) { + for address in addresses { + entry.address_store.insert(AddressRecord::from_raw_multiaddr_with_score( + address.clone(), + scores::CONNECTION_FAILURE, + )); + } + } + } + + /// Update the status of the peer on connection established. + /// + /// If the peer exists in the routing table, the connection is set to `Connected`. + /// If the endpoint represents an address we have dialed, the address score + /// is updated in the store of the peer, making it more likely to be used in the future. + pub fn on_connection_established(&mut self, key: Key, endpoint: Endpoint) { + tracing::trace!(target: LOG_TARGET, ?key, ?endpoint, "on connection established"); + + if let KBucketEntry::Occupied(entry) = self.entry(key) { + entry.connection = ConnectionType::Connected; + + if let Endpoint::Dialer { address, .. } = endpoint { + entry.address_store.insert(AddressRecord::from_raw_multiaddr_with_score( + address, + scores::CONNECTION_ESTABLISHED, + )); + } + } + } + + /// Add known peer to [`RoutingTable`]. + /// + /// In order to bootstrap the lookup process, the routing table must be aware of + /// at least one node and of its addresses. + /// + /// The operation is ignored when: + /// - the provided addresses are empty + /// - the local node is being added + /// - the routing table is full + pub fn add_known_peer( + &mut self, + peer: PeerId, + addresses: Vec, + connection: ConnectionType, + ) { + tracing::trace!( + target: LOG_TARGET, + ?peer, + ?addresses, + ?connection, + "add known peer" + ); + + // TODO: https://github.com/paritytech/litep2p/issues/337 this has to be moved elsewhere at some point + let addresses: Vec = addresses + .into_iter() + .filter_map(|address| { + let last = address.iter().last(); + if std::matches!(last, Some(Protocol::P2p(_))) { + Some(address) + } else { + Some(address.with(Protocol::P2p(Multihash::from_bytes(&peer.to_bytes()).ok()?))) + } + }) + .collect(); + + if addresses.is_empty() { + tracing::debug!( + target: LOG_TARGET, + ?peer, + "tried to add zero addresses to the routing table" + ); + return; + } + + match self.entry(Key::from(peer)) { + KBucketEntry::Occupied(entry) => { + entry.push_addresses(addresses); + entry.connection = connection; + } + mut entry @ KBucketEntry::Vacant(_) => { + entry.insert(KademliaPeer::new(peer, addresses, connection)); + } + KBucketEntry::LocalNode => tracing::warn!( + target: LOG_TARGET, + ?peer, + "tried to add local node to routing table", + ), + KBucketEntry::NoSlot => tracing::trace!( + target: LOG_TARGET, + ?peer, + "routing table full, cannot add new entry", + ), + } + } + + /// Get `limit` closest peers to `target` from the k-buckets. + pub fn closest(&mut self, target: &Key, limit: usize) -> Vec { + ClosestBucketsIter::new(self.local_key.distance(&target)) + .flat_map(|index| self.buckets[index.get()].closest_iter(target)) + .take(limit) + .cloned() + .collect() + } +} + +/// An iterator over the bucket indices, in the order determined by the `Distance` of a target from +/// the `local_key`, such that the entries in the buckets are incrementally further away from the +/// target, starting with the bucket covering the target. +/// The original implementation is taken from `rust-libp2p`, see [issue#1117][1] for the explanation +/// of the algorithm used. +/// +/// [1]: https://github.com/libp2p/rust-libp2p/pull/1117#issuecomment-494694635 +struct ClosestBucketsIter { + /// The distance to the `local_key`. + distance: Distance, + /// The current state of the iterator. + state: ClosestBucketsIterState, +} + +/// Operating states of a `ClosestBucketsIter`. +enum ClosestBucketsIterState { + /// The starting state of the iterator yields the first bucket index and + /// then transitions to `ZoomIn`. + Start(BucketIndex), + /// The iterator "zooms in" to to yield the next bucket cotaining nodes that + /// are incrementally closer to the local node but further from the `target`. + /// These buckets are identified by a `1` in the corresponding bit position + /// of the distance bit string. When bucket `0` is reached, the iterator + /// transitions to `ZoomOut`. + ZoomIn(BucketIndex), + /// Once bucket `0` has been reached, the iterator starts "zooming out" + /// to buckets containing nodes that are incrementally further away from + /// both the local key and the target. These are identified by a `0` in + /// the corresponding bit position of the distance bit string. When bucket + /// `255` is reached, the iterator transitions to state `Done`. + ZoomOut(BucketIndex), + /// The iterator is in this state once it has visited all buckets. + Done, +} + +impl ClosestBucketsIter { + fn new(distance: Distance) -> Self { + let state = match BucketIndex::new(&distance) { + Some(i) => ClosestBucketsIterState::Start(i), + None => ClosestBucketsIterState::Start(BucketIndex(0)), + }; + Self { distance, state } + } + + fn next_in(&self, i: BucketIndex) -> Option { + (0..i.get()) + .rev() + .find_map(|i| self.distance.0.bit(i).then_some(BucketIndex(i))) + } + + fn next_out(&self, i: BucketIndex) -> Option { + (i.get() + 1..NUM_BUCKETS).find_map(|i| (!self.distance.0.bit(i)).then_some(BucketIndex(i))) + } +} + +impl Iterator for ClosestBucketsIter { + type Item = BucketIndex; + + fn next(&mut self) -> Option { + match self.state { + ClosestBucketsIterState::Start(i) => { + self.state = ClosestBucketsIterState::ZoomIn(i); + Some(i) + } + ClosestBucketsIterState::ZoomIn(i) => + if let Some(i) = self.next_in(i) { + self.state = ClosestBucketsIterState::ZoomIn(i); + Some(i) + } else { + let i = BucketIndex(0); + self.state = ClosestBucketsIterState::ZoomOut(i); + Some(i) + }, + ClosestBucketsIterState::ZoomOut(i) => + if let Some(i) = self.next_out(i) { + self.state = ClosestBucketsIterState::ZoomOut(i); + Some(i) + } else { + self.state = ClosestBucketsIterState::Done; + None + }, + ClosestBucketsIterState::Done => None, + } + } +} + +#[cfg(test)] +mod tests { + use super::*; + use crate::protocol::libp2p::kademlia::types::ConnectionType; + + #[test] + fn closest_peers() { + let own_peer_id = PeerId::random(); + let own_key = Key::from(own_peer_id); + let mut table = RoutingTable::new(own_key.clone()); + + for _ in 0..60 { + let peer = PeerId::random(); + let key = Key::from(peer); + let mut entry = table.entry(key.clone()); + entry.insert(KademliaPeer::new(peer, vec![], ConnectionType::Connected)); + } + + let target = Key::from(PeerId::random()); + let closest = table.closest(&target, 60usize); + let mut prev = None; + + for peer in &closest { + if let Some(value) = prev { + assert!(value < target.distance(&peer.key)); + } + + prev = Some(target.distance(&peer.key)); + } + } + + // generate random peer that falls in to specified k-bucket. + // + // NOTE: the preimage of the generated `Key` doesn't match the `Key` itself + fn random_peer( + rng: &mut impl rand::Rng, + own_key: Key, + bucket_index: usize, + ) -> (Key, PeerId) { + let peer = PeerId::random(); + let distance = BucketIndex(bucket_index).rand_distance(rng); + let key_bytes = own_key.for_distance(distance); + + (Key::from_bytes(key_bytes, peer), peer) + } + + #[test] + fn add_peer_to_empty_table() { + let own_peer_id = PeerId::random(); + let own_key = Key::from(own_peer_id); + let mut table = RoutingTable::new(own_key.clone()); + + // verify that local peer id resolves to special entry + match table.entry(own_key.clone()) { + KBucketEntry::LocalNode => {} + state => panic!("invalid state for `KBucketEntry`: {state:?}"), + }; + + let peer = PeerId::random(); + let key = Key::from(peer); + let mut test = table.entry(key.clone()); + let addresses = vec![]; + + assert!(std::matches!(test, KBucketEntry::Vacant(_))); + test.insert(KademliaPeer::new( + peer, + addresses.clone(), + ConnectionType::Connected, + )); + + match table.entry(key.clone()) { + KBucketEntry::Occupied(entry) => { + assert_eq!(entry.key, key); + assert_eq!(entry.peer, peer); + assert_eq!(entry.addresses(), addresses); + assert_eq!(entry.connection, ConnectionType::Connected); + } + state => panic!("invalid state for `KBucketEntry`: {state:?}"), + }; + + // Set the connection state + match table.entry(key.clone()) { + KBucketEntry::Occupied(entry) => { + entry.connection = ConnectionType::NotConnected; + } + state => panic!("invalid state for `KBucketEntry`: {state:?}"), + } + + match table.entry(key.clone()) { + KBucketEntry::Occupied(entry) => { + assert_eq!(entry.key, key); + assert_eq!(entry.peer, peer); + assert_eq!(entry.addresses(), addresses); + assert_eq!(entry.connection, ConnectionType::NotConnected); + } + state => panic!("invalid state for `KBucketEntry`: {state:?}"), + }; + } + + #[test] + fn full_k_bucket() { + let mut rng = rand::thread_rng(); + let own_peer_id = PeerId::random(); + let own_key = Key::from(own_peer_id); + let mut table = RoutingTable::new(own_key.clone()); + + // add 20 nodes to the same k-bucket + for _ in 0..20 { + let (key, peer) = random_peer(&mut rng, own_key.clone(), 254); + let mut entry = table.entry(key.clone()); + + assert!(std::matches!(entry, KBucketEntry::Vacant(_))); + entry.insert(KademliaPeer::new(peer, vec![], ConnectionType::Connected)); + } + + // try to add another peer and verify the peer is rejected + // because the k-bucket is full of connected nodes + let peer = PeerId::random(); + let distance = BucketIndex(254).rand_distance(&mut rng); + let key_bytes = own_key.for_distance(distance); + let key = Key::from_bytes(key_bytes, peer); + + let entry = table.entry(key.clone()); + assert!(std::matches!(entry, KBucketEntry::NoSlot)); + } + + #[test] + #[ignore] + fn peer_disconnects_and_is_evicted() { + let mut rng = rand::thread_rng(); + let own_peer_id = PeerId::random(); + let own_key = Key::from(own_peer_id); + let mut table = RoutingTable::new(own_key.clone()); + + // add 20 nodes to the same k-bucket + let peers = (0..20) + .map(|_| { + let (key, peer) = random_peer(&mut rng, own_key.clone(), 253); + let mut entry = table.entry(key.clone()); + + assert!(std::matches!(entry, KBucketEntry::Vacant(_))); + entry.insert(KademliaPeer::new(peer, vec![], ConnectionType::Connected)); + + (peer, key) + }) + .collect::>(); + + // try to add another peer and verify the peer is rejected + // because the k-bucket is full of connected nodes + let peer = PeerId::random(); + let distance = BucketIndex(253).rand_distance(&mut rng); + let key_bytes = own_key.for_distance(distance); + let key = Key::from_bytes(key_bytes, peer); + + let entry = table.entry(key.clone()); + assert!(std::matches!(entry, KBucketEntry::NoSlot)); + + // disconnect random peer + match table.entry(peers[3].1.clone()) { + KBucketEntry::Occupied(entry) => { + entry.connection = ConnectionType::NotConnected; + } + _ => panic!("invalid state for node"), + } + + // try to add the previously rejected peer again and verify it's added + let mut entry = table.entry(key.clone()); + assert!(std::matches!(entry, KBucketEntry::Vacant(_))); + entry.insert(KademliaPeer::new( + peer, + vec!["/ip6/::1/tcp/8888".parse().unwrap()], + ConnectionType::CanConnect, + )); + + // verify the node is still there + let entry = table.entry(key.clone()); + let addresses = vec!["/ip6/::1/tcp/8888".parse().unwrap()]; + + match entry { + KBucketEntry::Occupied(entry) => { + assert_eq!(entry.key, key); + assert_eq!(entry.peer, peer); + assert_eq!(entry.addresses(), addresses); + assert_eq!(entry.connection, ConnectionType::CanConnect); + } + state => panic!("invalid state for `KBucketEntry`: {state:?}"), + } + } + + #[test] + fn disconnected_peers_are_not_evicted_if_there_is_capacity() { + let mut rng = rand::thread_rng(); + let own_peer_id = PeerId::random(); + let own_key = Key::from(own_peer_id); + let mut table = RoutingTable::new(own_key.clone()); + + // add 19 disconnected nodes to the same k-bucket + let _peers = (0..19) + .map(|_| { + let (key, peer) = random_peer(&mut rng, own_key.clone(), 252); + let mut entry = table.entry(key.clone()); + + assert!(std::matches!(entry, KBucketEntry::Vacant(_))); + entry.insert(KademliaPeer::new( + peer, + vec![], + ConnectionType::NotConnected, + )); + + (peer, key) + }) + .collect::>(); + + // try to add another peer and verify it's accepted as there is + // still room in the k-bucket for the node + let peer = PeerId::random(); + let distance = BucketIndex(252).rand_distance(&mut rng); + let key_bytes = own_key.for_distance(distance); + let key = Key::from_bytes(key_bytes, peer); + + let mut entry = table.entry(key.clone()); + assert!(std::matches!(entry, KBucketEntry::Vacant(_))); + entry.insert(KademliaPeer::new( + peer, + vec!["/ip6/::1/tcp/8888".parse().unwrap()], + ConnectionType::CanConnect, + )); + } + + #[test] + fn closest_buckets_iterator_set_lsb() { + // Test zooming-in & zooming-out of the iterator using a toy example with set LSB. + let d = Distance(U256::from(0b10011011)); + let mut iter = ClosestBucketsIter::new(d); + // Note that bucket 0 is visited twice. This is, technically, a bug, but to not complicate + // the implementation and keep it consistent with `libp2p` it's kept as is. There are + // virtually no practical consequences of this, because to have bucket 0 populated we have + // to encounter two sha256 hash values differing only in one least significant bit. + let expected_buckets = + vec![7, 4, 3, 1, 0, 0, 2, 5, 6].into_iter().chain(8..=255).map(BucketIndex); + for expected in expected_buckets { + let got = iter.next().unwrap(); + assert_eq!(got, expected); + } + assert!(iter.next().is_none()); + } + + #[test] + fn closest_buckets_iterator_unset_lsb() { + // Test zooming-in & zooming-out of the iterator using a toy example with unset LSB. + let d = Distance(U256::from(0b01011010)); + let mut iter = ClosestBucketsIter::new(d); + let expected_buckets = + vec![6, 4, 3, 1, 0, 2, 5, 7].into_iter().chain(8..=255).map(BucketIndex); + for expected in expected_buckets { + let got = iter.next().unwrap(); + assert_eq!(got, expected); + } + assert!(iter.next().is_none()); + } +} diff --git a/client/litep2p/src/protocol/libp2p/kademlia/store.rs b/client/litep2p/src/protocol/libp2p/kademlia/store.rs new file mode 100644 index 00000000..914587b9 --- /dev/null +++ b/client/litep2p/src/protocol/libp2p/kademlia/store.rs @@ -0,0 +1,1112 @@ +// Copyright 2023 litep2p developers +// +// Permission is hereby granted, free of charge, to any person obtaining a +// copy of this software and associated documentation files (the "Software"), +// to deal in the Software without restriction, including without limitation +// the rights to use, copy, modify, merge, publish, distribute, sublicense, +// and/or sell copies of the Software, and to permit persons to whom the +// Software is furnished to do so, subject to the following conditions: +// +// The above copyright notice and this permission notice shall be included in +// all copies or substantial portions of the Software. +// +// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS +// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE +// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER +// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING +// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER +// DEALINGS IN THE SOFTWARE. + +//! Memory store implementation for Kademlia. + +use crate::{ + protocol::libp2p::kademlia::{ + config::{ + DEFAULT_MAX_PROVIDERS_PER_KEY, DEFAULT_MAX_PROVIDER_ADDRESSES, + DEFAULT_MAX_PROVIDER_KEYS, DEFAULT_MAX_RECORDS, DEFAULT_MAX_RECORD_SIZE_BYTES, + DEFAULT_PROVIDER_REFRESH_INTERVAL, DEFAULT_PROVIDER_TTL, + }, + record::{ContentProvider, Key, ProviderRecord, Record}, + types::Key as KademliaKey, + Quorum, + }, + utils::futures_stream::FuturesStream, + PeerId, +}; + +use futures::{future::BoxFuture, StreamExt}; +use std::{ + collections::{hash_map::Entry, HashMap}, + time::Duration, +}; + +/// Logging target for the file. +const LOG_TARGET: &str = "litep2p::ipfs::kademlia::store"; + +/// Memory store events. +#[derive(Debug, PartialEq, Eq)] +pub enum MemoryStoreAction { + RefreshProvider { + provided_key: Key, + provider: ContentProvider, + quorum: Quorum, + }, +} + +/// Memory store. +pub struct MemoryStore { + /// Local peer ID. Used to track local providers. + local_peer_id: PeerId, + /// Configuration. + config: MemoryStoreConfig, + /// Records. + records: HashMap, + /// Provider records. + provider_keys: HashMap>, + /// Local providers. + local_providers: HashMap, + /// Futures to signal it's time to republish a local provider. + pending_provider_refresh: FuturesStream>, +} + +impl MemoryStore { + /// Create new [`MemoryStore`]. + #[cfg(test)] + pub fn new(local_peer_id: PeerId) -> Self { + Self { + local_peer_id, + config: MemoryStoreConfig::default(), + records: HashMap::new(), + provider_keys: HashMap::new(), + local_providers: HashMap::new(), + pending_provider_refresh: FuturesStream::new(), + } + } + + /// Create new [`MemoryStore`] with the provided configuration. + pub fn with_config(local_peer_id: PeerId, config: MemoryStoreConfig) -> Self { + Self { + local_peer_id, + config, + records: HashMap::new(), + provider_keys: HashMap::new(), + local_providers: HashMap::new(), + pending_provider_refresh: FuturesStream::new(), + } + } + + /// Try to get record from local store for `key`. + pub fn get(&mut self, key: &Key) -> Option<&Record> { + let is_expired = self + .records + .get(key) + .is_some_and(|record| record.is_expired(std::time::Instant::now())); + + if is_expired { + self.records.remove(key); + None + } else { + self.records.get(key) + } + } + + /// Store record. + pub fn put(&mut self, record: Record) { + if record.value.len() >= self.config.max_record_size_bytes { + tracing::warn!( + target: LOG_TARGET, + key = ?record.key, + publisher = ?record.publisher, + size = record.value.len(), + max_size = self.config.max_record_size_bytes, + "discarding a DHT record that exceeds the configured size limit", + ); + return; + } + + let len = self.records.len(); + match self.records.entry(record.key.clone()) { + Entry::Occupied(mut entry) => { + // Lean towards the new record. + if let (Some(stored_record_ttl), Some(new_record_ttl)) = + (entry.get().expires, record.expires) + { + if stored_record_ttl > new_record_ttl { + return; + } + } + + entry.insert(record); + } + + Entry::Vacant(entry) => { + if len >= self.config.max_records { + tracing::warn!( + target: LOG_TARGET, + max_records = self.config.max_records, + "discarding a DHT record, because maximum memory store size reached", + ); + return; + } + + entry.insert(record); + } + } + } + + /// Try to get providers from local store for `key`. + /// + /// Returns a non-empty list of providers, if any. + pub fn get_providers(&mut self, key: &Key) -> Vec { + let drop_key = self.provider_keys.get_mut(key).is_some_and(|providers| { + let now = std::time::Instant::now(); + providers.retain(|p| !p.is_expired(now)); + + providers.is_empty() + }); + + if drop_key { + self.provider_keys.remove(key); + + Vec::default() + } else { + self.provider_keys + .get(key) + .cloned() + .unwrap_or_else(Vec::default) + .into_iter() + .map(|p| ContentProvider { + peer: p.provider, + addresses: p.addresses, + }) + .collect() + } + } + + /// Try to add a provider for `key`. If there are already `max_providers_per_key` for + /// this `key`, the new provider is only inserted if its closer to `key` than + /// the furthest already inserted provider. The furthest provider is then discarded. + /// + /// Returns `true` if the provider was added, `false` otherwise. + /// + /// `quorum` is only relevant for local providers. + pub fn put_provider(&mut self, key: Key, provider: ContentProvider) -> bool { + // Make sure we have no more than `max_provider_addresses`. + let provider_record = { + let mut record = ProviderRecord { + key, + provider: provider.peer, + addresses: provider.addresses, + expires: std::time::Instant::now() + self.config.provider_ttl, + }; + record.addresses.truncate(self.config.max_provider_addresses); + record + }; + + let can_insert_new_key = self.provider_keys.len() < self.config.max_provider_keys; + + match self.provider_keys.entry(provider_record.key.clone()) { + Entry::Vacant(entry) => + if can_insert_new_key { + entry.insert(vec![provider_record]); + + true + } else { + tracing::warn!( + target: LOG_TARGET, + max_provider_keys = self.config.max_provider_keys, + "discarding a provider record, because the provider key limit reached", + ); + + false + }, + Entry::Occupied(mut entry) => { + let providers = entry.get_mut(); + + // Providers under every key are sorted by distance from the provided key, with + // equal distances meaning peer IDs (more strictly, their hashes) + // are equal. + let provider_position = + providers.binary_search_by(|p| p.distance().cmp(&provider_record.distance())); + + match provider_position { + Ok(i) => { + // Update the provider in place. + providers[i] = provider_record.clone(); + + true + } + Err(i) => { + // `Err(i)` contains the insertion point. + if i == self.config.max_providers_per_key { + tracing::trace!( + target: LOG_TARGET, + key = ?provider_record.key, + provider = ?provider_record.provider, + max_providers_per_key = self.config.max_providers_per_key, + "discarding a provider record, because it's further than \ + existing `max_providers_per_key`", + ); + + false + } else { + if providers.len() == self.config.max_providers_per_key { + providers.pop(); + } + + providers.insert(i, provider_record.clone()); + + true + } + } + } + } + } + } + + /// Try to add ourself as a provider for `key`. + /// + /// Returns `true` if the provider was added, `false` otherwise. + pub fn put_local_provider(&mut self, key: Key, quorum: Quorum) -> bool { + let provider = ContentProvider { + peer: self.local_peer_id, + // For local providers addresses are populated when replying to `GET_PROVIDERS` + // requests. + addresses: vec![], + }; + + if self.put_provider(key.clone(), provider.clone()) { + let refresh_interval = self.config.provider_refresh_interval; + self.local_providers.insert(key.clone(), (provider, quorum)); + self.pending_provider_refresh.push(Box::pin(async move { + tokio::time::sleep(refresh_interval).await; + key + })); + + true + } else { + false + } + } + + /// Remove local provider for `key`. + pub fn remove_local_provider(&mut self, key: Key) { + if self.local_providers.remove(&key).is_none() { + tracing::warn!(?key, "trying to remove nonexistent local provider",); + return; + }; + + match self.provider_keys.entry(key.clone()) { + Entry::Vacant(_) => { + tracing::error!(?key, "local provider key not found during removal",); + debug_assert!(false); + } + Entry::Occupied(mut entry) => { + let providers = entry.get_mut(); + + // Providers are sorted by distance. + let local_provider_distance = + KademliaKey::from(self.local_peer_id).distance(&KademliaKey::new(key.clone())); + let provider_position = + providers.binary_search_by(|p| p.distance().cmp(&local_provider_distance)); + + match provider_position { + Ok(i) => { + providers.remove(i); + } + Err(_) => { + tracing::error!(?key, "local provider not found during removal",); + debug_assert!(false); + return; + } + } + + if providers.is_empty() { + entry.remove(); + } + } + }; + } + + /// Poll next action from the store. + pub async fn next_action(&mut self) -> Option { + // [`FuturesStream`] never terminates, so `and_then()` below is always triggered. + self.pending_provider_refresh.next().await.and_then(|key| { + if let Some((provider, quorum)) = self.local_providers.get(&key).cloned() { + tracing::trace!( + target: LOG_TARGET, + ?key, + "refresh provider" + ); + + Some(MemoryStoreAction::RefreshProvider { + provided_key: key, + provider, + quorum, + }) + } else { + tracing::trace!( + target: LOG_TARGET, + ?key, + "it's time to refresh a provider, but we do not provide this key anymore", + ); + + None + } + }) + } +} + +#[derive(Debug)] +pub struct MemoryStoreConfig { + /// Maximum number of records to store. + pub max_records: usize, + + /// Maximum size of a record in bytes. + pub max_record_size_bytes: usize, + + /// Maximum number of provider keys this node stores. + pub max_provider_keys: usize, + + /// Maximum number of cached addresses per provider. + pub max_provider_addresses: usize, + + /// Maximum number of providers per key. Only providers with peer IDs closest to the key are + /// kept. + pub max_providers_per_key: usize, + + /// Local providers republish interval. + pub provider_refresh_interval: Duration, + + /// Provider record TTL. + pub provider_ttl: Duration, +} + +impl Default for MemoryStoreConfig { + fn default() -> Self { + Self { + max_records: DEFAULT_MAX_RECORDS, + max_record_size_bytes: DEFAULT_MAX_RECORD_SIZE_BYTES, + max_provider_keys: DEFAULT_MAX_PROVIDER_KEYS, + max_provider_addresses: DEFAULT_MAX_PROVIDER_ADDRESSES, + max_providers_per_key: DEFAULT_MAX_PROVIDERS_PER_KEY, + provider_refresh_interval: DEFAULT_PROVIDER_REFRESH_INTERVAL, + provider_ttl: DEFAULT_PROVIDER_TTL, + } + } +} + +#[cfg(test)] +mod tests { + use super::*; + use crate::{protocol::libp2p::kademlia::types::Key as KademliaKey, PeerId}; + use multiaddr::multiaddr; + + #[test] + fn put_get_record() { + let mut store = MemoryStore::new(PeerId::random()); + let key = Key::from(vec![1, 2, 3]); + let record = Record::new(key.clone(), vec![4, 5, 6]); + + store.put(record.clone()); + assert_eq!(store.get(&key), Some(&record)); + } + + #[test] + fn max_records() { + let mut store = MemoryStore::with_config( + PeerId::random(), + MemoryStoreConfig { + max_records: 1, + max_record_size_bytes: 1024, + ..Default::default() + }, + ); + + let key1 = Key::from(vec![1, 2, 3]); + let key2 = Key::from(vec![4, 5, 6]); + let record1 = Record::new(key1.clone(), vec![4, 5, 6]); + let record2 = Record::new(key2.clone(), vec![7, 8, 9]); + + store.put(record1.clone()); + store.put(record2.clone()); + + assert_eq!(store.get(&key1), Some(&record1)); + assert_eq!(store.get(&key2), None); + } + + #[test] + fn expired_record_removed() { + let mut store = MemoryStore::new(PeerId::random()); + let key = Key::from(vec![1, 2, 3]); + let record = Record { + key: key.clone(), + value: vec![4, 5, 6], + publisher: None, + expires: Some(std::time::Instant::now() - std::time::Duration::from_secs(5)), + }; + // Record is already expired. + assert!(record.is_expired(std::time::Instant::now())); + + store.put(record.clone()); + assert_eq!(store.get(&key), None); + } + + #[test] + fn new_record_overwrites() { + let mut store = MemoryStore::new(PeerId::random()); + let key = Key::from(vec![1, 2, 3]); + let record1 = Record { + key: key.clone(), + value: vec![4, 5, 6], + publisher: None, + expires: Some(std::time::Instant::now() + std::time::Duration::from_secs(100)), + }; + let record2 = Record { + key: key.clone(), + value: vec![4, 5, 6], + publisher: None, + expires: Some(std::time::Instant::now() + std::time::Duration::from_secs(1000)), + }; + + store.put(record1.clone()); + assert_eq!(store.get(&key), Some(&record1)); + + store.put(record2.clone()); + assert_eq!(store.get(&key), Some(&record2)); + } + + #[test] + fn max_record_size() { + let mut store = MemoryStore::with_config( + PeerId::random(), + MemoryStoreConfig { + max_records: 1024, + max_record_size_bytes: 2, + ..Default::default() + }, + ); + + let key = Key::from(vec![1, 2, 3]); + let record = Record::new(key.clone(), vec![4, 5]); + store.put(record.clone()); + assert_eq!(store.get(&key), None); + + let record = Record::new(key.clone(), vec![4]); + store.put(record.clone()); + assert_eq!(store.get(&key), Some(&record)); + } + + #[test] + fn put_get_provider() { + let mut store = MemoryStore::new(PeerId::random()); + let key = Key::from(vec![1, 2, 3]); + let provider = ContentProvider { + peer: PeerId::random(), + addresses: vec![multiaddr!(Ip4([127, 0, 0, 1]), Tcp(10000u16))], + }; + + store.put_provider(key.clone(), provider.clone()); + assert_eq!(store.get_providers(&key), vec![provider]); + } + + #[test] + fn multiple_providers_per_key() { + let mut store = MemoryStore::new(PeerId::random()); + let key = Key::from(vec![1, 2, 3]); + let provider1 = ContentProvider { + peer: PeerId::random(), + addresses: vec![multiaddr!(Ip4([127, 0, 0, 1]), Tcp(10000u16))], + }; + let provider2 = ContentProvider { + peer: PeerId::random(), + addresses: vec![multiaddr!(Ip4([127, 0, 0, 1]), Tcp(10000u16))], + }; + + store.put_provider(key.clone(), provider1.clone()); + store.put_provider(key.clone(), provider2.clone()); + + let got_providers = store.get_providers(&key); + assert_eq!(got_providers.len(), 2); + assert!(got_providers.contains(&provider1)); + assert!(got_providers.contains(&provider2)); + } + + #[test] + fn providers_sorted_by_distance() { + let mut store = MemoryStore::new(PeerId::random()); + let key = Key::from(vec![1, 2, 3]); + let providers = (0..10) + .map(|_| ContentProvider { + peer: PeerId::random(), + addresses: vec![multiaddr!(Ip4([127, 0, 0, 1]), Tcp(10000u16))], + }) + .collect::>(); + + providers.iter().for_each(|p| { + store.put_provider(key.clone(), p.clone()); + }); + + let sorted_providers = { + let target = KademliaKey::new(key.clone()); + let mut providers = providers; + providers.sort_by(|p1, p2| { + KademliaKey::from(p1.peer) + .distance(&target) + .cmp(&KademliaKey::from(p2.peer).distance(&target)) + }); + providers + }; + + assert_eq!(store.get_providers(&key), sorted_providers); + } + + #[test] + fn max_providers_per_key() { + let mut store = MemoryStore::with_config( + PeerId::random(), + MemoryStoreConfig { + max_providers_per_key: 10, + ..Default::default() + }, + ); + let key = Key::from(vec![1, 2, 3]); + let providers = (0..20) + .map(|_| ContentProvider { + peer: PeerId::random(), + addresses: vec![multiaddr!(Ip4([127, 0, 0, 1]), Tcp(10000u16))], + }) + .collect::>(); + + providers.iter().for_each(|p| { + store.put_provider(key.clone(), p.clone()); + }); + assert_eq!(store.get_providers(&key).len(), 10); + } + + #[test] + fn closest_providers_kept() { + let mut store = MemoryStore::with_config( + PeerId::random(), + MemoryStoreConfig { + max_providers_per_key: 10, + ..Default::default() + }, + ); + let key = Key::from(vec![1, 2, 3]); + let providers = (0..20) + .map(|_| ContentProvider { + peer: PeerId::random(), + addresses: vec![multiaddr!(Ip4([127, 0, 0, 1]), Tcp(10000u16))], + }) + .collect::>(); + + providers.iter().for_each(|p| { + store.put_provider(key.clone(), p.clone()); + }); + + let closest_providers = { + let target = KademliaKey::new(key.clone()); + let mut providers = providers; + providers.sort_by(|p1, p2| { + KademliaKey::from(p1.peer) + .distance(&target) + .cmp(&KademliaKey::from(p2.peer).distance(&target)) + }); + providers.truncate(10); + providers + }; + + assert_eq!(store.get_providers(&key), closest_providers); + } + + #[test] + fn furthest_provider_discarded() { + let mut store = MemoryStore::with_config( + PeerId::random(), + MemoryStoreConfig { + max_providers_per_key: 10, + ..Default::default() + }, + ); + let key = Key::from(vec![1, 2, 3]); + let providers = (0..11) + .map(|_| ContentProvider { + peer: PeerId::random(), + addresses: vec![multiaddr!(Ip4([127, 0, 0, 1]), Tcp(10000u16))], + }) + .collect::>(); + + let sorted_providers = { + let target = KademliaKey::new(key.clone()); + let mut providers = providers; + providers.sort_by(|p1, p2| { + KademliaKey::from(p1.peer) + .distance(&target) + .cmp(&KademliaKey::from(p2.peer).distance(&target)) + }); + providers + }; + + // First 10 providers are inserted. + for i in 0..10 { + assert!(store.put_provider(key.clone(), sorted_providers[i].clone())); + } + assert_eq!(store.get_providers(&key), sorted_providers[..10]); + + // The furthests provider doesn't fit. + assert!(!store.put_provider(key.clone(), sorted_providers[10].clone())); + assert_eq!(store.get_providers(&key), sorted_providers[..10]); + } + + #[test] + fn update_provider_in_place() { + let mut store = MemoryStore::with_config( + PeerId::random(), + MemoryStoreConfig { + max_providers_per_key: 10, + ..Default::default() + }, + ); + let key = Key::from(vec![1, 2, 3]); + let peer_ids = (0..10).map(|_| PeerId::random()).collect::>(); + let peer_id0 = peer_ids[0]; + let providers = peer_ids + .iter() + .map(|peer_id| ContentProvider { + peer: *peer_id, + addresses: vec![multiaddr!(Ip4([127, 0, 0, 1]), Tcp(10000u16))], + }) + .collect::>(); + + providers.iter().for_each(|p| { + store.put_provider(key.clone(), p.clone()); + }); + + let sorted_providers = { + let target = KademliaKey::new(key.clone()); + let mut providers = providers; + providers.sort_by(|p1, p2| { + KademliaKey::from(p1.peer) + .distance(&target) + .cmp(&KademliaKey::from(p2.peer).distance(&target)) + }); + providers + }; + + assert_eq!(store.get_providers(&key), sorted_providers); + + let provider0_new = ContentProvider { + peer: peer_id0, + addresses: vec![multiaddr!(Ip4([192, 168, 0, 1]), Tcp(20000u16))], + }; + + // Provider is updated in place. + assert!(store.put_provider(key.clone(), provider0_new.clone())); + + let providers_new = sorted_providers + .into_iter() + .map(|p| { + if p.peer == peer_id0 { + provider0_new.clone() + } else { + p + } + }) + .collect::>(); + + assert_eq!(store.get_providers(&key), providers_new); + } + + #[tokio::test] + async fn provider_record_expires() { + let mut store = MemoryStore::with_config( + PeerId::random(), + MemoryStoreConfig { + provider_ttl: std::time::Duration::from_secs(1), + ..Default::default() + }, + ); + let key = Key::from(vec![1, 2, 3]); + let provider = ContentProvider { + peer: PeerId::random(), + addresses: vec![multiaddr!(Ip4([127, 0, 0, 1]), Tcp(10000u16))], + }; + + store.put_provider(key.clone(), provider.clone()); + + // Provider does not instantly expire. + assert_eq!(store.get_providers(&key), vec![provider]); + + // Provider expires after 2 seconds. + tokio::time::sleep(Duration::from_secs(2)).await; + assert_eq!(store.get_providers(&key), vec![]); + } + + #[tokio::test] + async fn individual_provider_record_expires() { + let mut store = MemoryStore::with_config( + PeerId::random(), + MemoryStoreConfig { + provider_ttl: std::time::Duration::from_secs(8), + ..Default::default() + }, + ); + let key = Key::from(vec![1, 2, 3]); + let provider1 = ContentProvider { + peer: PeerId::random(), + addresses: vec![multiaddr!(Ip4([127, 0, 0, 1]), Tcp(10000u16))], + }; + let provider2 = ContentProvider { + peer: PeerId::random(), + addresses: vec![multiaddr!(Ip4([127, 0, 0, 1]), Tcp(10000u16))], + }; + + store.put_provider(key.clone(), provider1.clone()); + tokio::time::sleep(Duration::from_secs(4)).await; + store.put_provider(key.clone(), provider2.clone()); + + // Providers do not instantly expire. + let got_providers = store.get_providers(&key); + assert_eq!(got_providers.len(), 2); + assert!(got_providers.contains(&provider1)); + assert!(got_providers.contains(&provider2)); + + // First provider expires. + tokio::time::sleep(Duration::from_secs(6)).await; + assert_eq!(store.get_providers(&key), vec![provider2]); + + // Second provider expires. + tokio::time::sleep(Duration::from_secs(4)).await; + assert_eq!(store.get_providers(&key), vec![]); + } + + #[test] + fn max_addresses_per_provider() { + let mut store = MemoryStore::with_config( + PeerId::random(), + MemoryStoreConfig { + max_provider_addresses: 2, + ..Default::default() + }, + ); + let key = Key::from(vec![1, 2, 3]); + let provider = ContentProvider { + peer: PeerId::random(), + addresses: vec![ + multiaddr!(Ip4([127, 0, 0, 1]), Tcp(10000u16)), + multiaddr!(Ip4([127, 0, 0, 1]), Tcp(10001u16)), + multiaddr!(Ip4([127, 0, 0, 1]), Tcp(10002u16)), + multiaddr!(Ip4([127, 0, 0, 1]), Tcp(10003u16)), + multiaddr!(Ip4([127, 0, 0, 1]), Tcp(10004u16)), + ], + }; + + store.put_provider(key.clone(), provider); + + let got_providers = store.get_providers(&key); + assert_eq!(got_providers.len(), 1); + assert_eq!(got_providers.first().unwrap().addresses.len(), 2); + } + + #[test] + fn max_provider_keys() { + let mut store = MemoryStore::with_config( + PeerId::random(), + MemoryStoreConfig { + max_provider_keys: 2, + ..Default::default() + }, + ); + + let key1 = Key::from(vec![1, 1, 1]); + let provider1 = ContentProvider { + peer: PeerId::random(), + addresses: vec![multiaddr!(Ip4([127, 0, 0, 1]), Tcp(10001u16))], + }; + let key2 = Key::from(vec![2, 2, 2]); + let provider2 = ContentProvider { + peer: PeerId::random(), + addresses: vec![multiaddr!(Ip4([127, 0, 0, 1]), Tcp(10002u16))], + }; + let key3 = Key::from(vec![3, 3, 3]); + let provider3 = ContentProvider { + peer: PeerId::random(), + addresses: vec![multiaddr!(Ip4([127, 0, 0, 1]), Tcp(10003u16))], + }; + + assert!(store.put_provider(key1.clone(), provider1.clone())); + assert!(store.put_provider(key2.clone(), provider2.clone())); + assert!(!store.put_provider(key3.clone(), provider3.clone())); + + assert_eq!(store.get_providers(&key1), vec![provider1]); + assert_eq!(store.get_providers(&key2), vec![provider2]); + assert_eq!(store.get_providers(&key3), vec![]); + } + + #[test] + fn local_provider_registered() { + let local_peer_id = PeerId::random(); + let mut store = MemoryStore::new(local_peer_id); + + let key = Key::from(vec![1, 2, 3]); + let local_provider = ContentProvider { + peer: local_peer_id, + addresses: vec![], + }; + let quorum = Quorum::All; + + assert!(store.local_providers.is_empty()); + assert_eq!(store.pending_provider_refresh.len(), 0); + + assert!(store.put_local_provider(key.clone(), quorum)); + + assert_eq!( + store.local_providers.get(&key), + Some(&(local_provider, quorum)), + ); + assert_eq!(store.pending_provider_refresh.len(), 1); + } + + #[test] + fn local_provider_registered_after_remote_provider() { + let local_peer_id = PeerId::random(); + let mut store = MemoryStore::new(local_peer_id); + + let key = Key::from(vec![1, 2, 3]); + + let remote_peer_id = PeerId::random(); + let remote_provider = ContentProvider { + peer: remote_peer_id, + addresses: vec![multiaddr!(Ip4([192, 168, 0, 1]), Tcp(10000u16))], + }; + + let local_provider = ContentProvider { + peer: local_peer_id, + addresses: vec![], + }; + let quorum = Quorum::N(5.try_into().unwrap()); + + assert!(store.local_providers.is_empty()); + assert_eq!(store.pending_provider_refresh.len(), 0); + + assert!(store.put_provider(key.clone(), remote_provider.clone())); + assert!(store.put_local_provider(key.clone(), quorum)); + + let got_providers = store.get_providers(&key); + assert_eq!(got_providers.len(), 2); + assert!(got_providers.contains(&remote_provider)); + assert!(got_providers.contains(&local_provider)); + + assert_eq!( + store.local_providers.get(&key), + Some(&(local_provider, quorum)) + ); + assert_eq!(store.pending_provider_refresh.len(), 1); + } + + #[test] + fn local_provider_removed() { + let local_peer_id = PeerId::random(); + let mut store = MemoryStore::new(local_peer_id); + + let key = Key::from(vec![1, 2, 3]); + let local_provider = ContentProvider { + peer: local_peer_id, + addresses: vec![], + }; + let quorum = Quorum::One; + + assert!(store.local_providers.is_empty()); + + assert!(store.put_local_provider(key.clone(), quorum)); + + assert_eq!( + store.local_providers.get(&key), + Some(&(local_provider, quorum)) + ); + + store.remove_local_provider(key.clone()); + + assert!(store.get_providers(&key).is_empty()); + assert!(store.local_providers.is_empty()); + } + + #[test] + fn local_provider_removed_when_remote_providers_present() { + let local_peer_id = PeerId::random(); + let mut store = MemoryStore::new(local_peer_id); + + let key = Key::from(vec![1, 2, 3]); + + let remote_peer_id = PeerId::random(); + let remote_provider = ContentProvider { + peer: remote_peer_id, + addresses: vec![multiaddr!(Ip4([192, 168, 0, 1]), Tcp(10000u16))], + }; + + let local_provider = ContentProvider { + peer: local_peer_id, + addresses: vec![], + }; + let quorum = Quorum::One; + + assert!(store.put_provider(key.clone(), remote_provider.clone())); + assert!(store.put_local_provider(key.clone(), quorum)); + + let got_providers = store.get_providers(&key); + assert_eq!(got_providers.len(), 2); + assert!(got_providers.contains(&remote_provider)); + assert!(got_providers.contains(&local_provider)); + + assert_eq!( + store.local_providers.get(&key), + Some(&(local_provider, quorum)) + ); + + store.remove_local_provider(key.clone()); + + assert_eq!(store.get_providers(&key), vec![remote_provider]); + assert!(store.local_providers.is_empty()); + } + + #[tokio::test] + async fn local_provider_refresh() { + let local_peer_id = PeerId::random(); + let mut store = MemoryStore::with_config( + local_peer_id, + MemoryStoreConfig { + provider_refresh_interval: Duration::from_secs(5), + ..Default::default() + }, + ); + + let key = Key::from(vec![1, 2, 3]); + let local_provider = ContentProvider { + peer: local_peer_id, + addresses: vec![], + }; + let quorum = Quorum::One; + + assert!(store.put_local_provider(key.clone(), quorum)); + + assert_eq!(store.get_providers(&key), vec![local_provider.clone()]); + assert_eq!( + store.local_providers.get(&key), + Some(&(local_provider.clone(), quorum)) + ); + + // No actions are instantly generated. + assert!(matches!( + tokio::time::timeout(Duration::from_secs(1), store.next_action()).await, + Err(_), + )); + // The local provider is refreshed. + assert_eq!( + tokio::time::timeout(Duration::from_secs(10), store.next_action()) + .await + .unwrap(), + Some(MemoryStoreAction::RefreshProvider { + provided_key: key, + provider: local_provider, + quorum, + }), + ); + } + + #[tokio::test] + async fn local_provider_inserted_after_remote_provider_refresh() { + let local_peer_id = PeerId::random(); + let mut store = MemoryStore::with_config( + local_peer_id, + MemoryStoreConfig { + provider_refresh_interval: Duration::from_secs(5), + ..Default::default() + }, + ); + + let key = Key::from(vec![1, 2, 3]); + + let remote_peer_id = PeerId::random(); + let remote_provider = ContentProvider { + peer: remote_peer_id, + addresses: vec![multiaddr!(Ip4([192, 168, 0, 1]), Tcp(10000u16))], + }; + + let local_provider = ContentProvider { + peer: local_peer_id, + addresses: vec![], + }; + let quorum = Quorum::One; + + assert!(store.put_provider(key.clone(), remote_provider.clone())); + assert!(store.put_local_provider(key.clone(), quorum)); + + let got_providers = store.get_providers(&key); + assert_eq!(got_providers.len(), 2); + assert!(got_providers.contains(&remote_provider)); + assert!(got_providers.contains(&local_provider)); + + assert_eq!( + store.local_providers.get(&key), + Some(&(local_provider.clone(), quorum)) + ); + + // No actions are instantly generated. + assert!(matches!( + tokio::time::timeout(Duration::from_secs(1), store.next_action()).await, + Err(_), + )); + // The local provider is refreshed. + assert_eq!( + tokio::time::timeout(Duration::from_secs(10), store.next_action()) + .await + .unwrap(), + Some(MemoryStoreAction::RefreshProvider { + provided_key: key, + provider: local_provider, + quorum, + }), + ); + } + + #[tokio::test] + async fn removed_local_provider_not_refreshed() { + let local_peer_id = PeerId::random(); + let mut store = MemoryStore::with_config( + local_peer_id, + MemoryStoreConfig { + provider_refresh_interval: Duration::from_secs(1), + ..Default::default() + }, + ); + + let key = Key::from(vec![1, 2, 3]); + let local_provider = ContentProvider { + peer: local_peer_id, + addresses: vec![], + }; + let quorum = Quorum::One; + + assert!(store.put_local_provider(key.clone(), quorum)); + + assert_eq!(store.get_providers(&key), vec![local_provider.clone()]); + assert_eq!( + store.local_providers.get(&key), + Some(&(local_provider, quorum)) + ); + + store.remove_local_provider(key); + + // The local provider is not refreshed in 10 secs (future fires at 1 sec and yields `None`). + assert_eq!( + tokio::time::timeout(Duration::from_secs(5), store.next_action()).await, + Ok(None), + ); + assert!(matches!( + tokio::time::timeout(Duration::from_secs(5), store.next_action()).await, + Err(_), + )); + } +} diff --git a/client/litep2p/src/protocol/libp2p/kademlia/types.rs b/client/litep2p/src/protocol/libp2p/kademlia/types.rs new file mode 100644 index 00000000..b954072e --- /dev/null +++ b/client/litep2p/src/protocol/libp2p/kademlia/types.rs @@ -0,0 +1,341 @@ +// Copyright 2018-2019 Parity Technologies (UK) Ltd. +// Copyright 2023 litep2p developers +// +// Permission is hereby granted, free of charge, to any person obtaining a +// copy of this software and associated documentation files (the "Software"), +// to deal in the Software without restriction, including without limitation +// the rights to use, copy, modify, merge, publish, distribute, sublicense, +// and/or sell copies of the Software, and to permit persons to whom the +// Software is furnished to do so, subject to the following conditions: +// +// The above copyright notice and this permission notice shall be included in +// all copies or substantial portions of the Software. +// +// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS +// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE +// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER +// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING +// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER +// DEALINGS IN THE SOFTWARE. + +// Note: This is coming from the external construct_uint crate. +#![allow(clippy::manual_div_ceil)] + +//! Kademlia types. + +use crate::{ + protocol::libp2p::kademlia::schema, + transport::manager::address::{AddressRecord, AddressStore}, + PeerId, +}; + +use multiaddr::Multiaddr; + +#[allow(deprecated)] +// TODO: remove `#[allow(deprecated)] once sha2-0.11 is released. +// See https://github.com/paritytech/litep2p/issues/449. +use sha2::digest::generic_array::GenericArray; + +use sha2::{digest::generic_array::typenum::U32, Digest, Sha256}; +use uint::*; + +use std::{ + borrow::Borrow, + hash::{Hash, Hasher}, +}; + +/// Maximum number of addresses to store for a peer. +const MAX_ADDRESSES: usize = 32; + +construct_uint! { + /// 256-bit unsigned integer. + pub(super) struct U256(4); +} + +/// A `Key` in the DHT keyspace with preserved preimage. +/// +/// Keys in the DHT keyspace identify both the participating nodes, as well as +/// the records stored in the DHT. +/// +/// `Key`s have an XOR metric as defined in the Kademlia paper, i.e. the bitwise XOR of +/// the hash digests, interpreted as an integer. See [`Key::distance`]. +#[derive(Clone, Debug)] +pub struct Key { + preimage: T, + bytes: KeyBytes, +} + +impl Key { + /// Constructs a new `Key` by running the given value through a random + /// oracle. + /// + /// The preimage of type `T` is preserved. + /// See [`Key::into_preimage`] for more details. + pub fn new(preimage: T) -> Key + where + T: Borrow<[u8]>, + { + let bytes = KeyBytes::new(preimage.borrow()); + Key { preimage, bytes } + } + + /// Convert [`Key`] into its preimage. + pub fn into_preimage(self) -> T { + self.preimage + } + + /// Computes the distance of the keys according to the XOR metric. + pub fn distance(&self, other: &U) -> Distance + where + U: AsRef, + { + self.bytes.distance(other) + } + + /// Returns the uniquely determined key with the given distance to `self`. + /// + /// This implements the following equivalence: + /// + /// `self xor other = distance <==> other = self xor distance` + #[cfg(test)] + pub fn for_distance(&self, d: Distance) -> KeyBytes { + self.bytes.for_distance(d) + } + + /// Generate key from `KeyBytes` with a random preimage. + /// + /// Only used for testing + #[cfg(test)] + pub fn from_bytes(bytes: KeyBytes, preimage: T) -> Key { + Self { bytes, preimage } + } +} + +impl From> for KeyBytes { + fn from(key: Key) -> KeyBytes { + key.bytes + } +} + +impl From for Key { + fn from(p: PeerId) -> Self { + let bytes = KeyBytes(Sha256::digest(p.to_bytes())); + Key { preimage: p, bytes } + } +} + +impl From> for Key> { + fn from(b: Vec) -> Self { + Key::new(b) + } +} + +impl AsRef for Key { + fn as_ref(&self) -> &KeyBytes { + &self.bytes + } +} + +impl PartialEq> for Key { + fn eq(&self, other: &Key) -> bool { + self.bytes == other.bytes + } +} + +impl Eq for Key {} + +impl Hash for Key { + fn hash(&self, state: &mut H) { + self.bytes.0.hash(state); + } +} + +/// The raw bytes of a key in the DHT keyspace. +#[derive(PartialEq, Eq, Clone, Debug)] +#[allow(deprecated)] +// TODO: remove `#[allow(deprecated)] once sha2-0.11 is released. +// See https://github.com/paritytech/litep2p/issues/449. +pub struct KeyBytes(GenericArray); + +impl KeyBytes { + /// Creates a new key in the DHT keyspace by running the given + /// value through a random oracle. + pub fn new(value: T) -> Self + where + T: Borrow<[u8]>, + { + KeyBytes(Sha256::digest(value.borrow())) + } + + /// Computes the distance of the keys according to the XOR metric. + #[allow(deprecated)] + // TODO: remove `#[allow(deprecated)] once sha2-0.11 is released. + // See https://github.com/paritytech/litep2p/issues/449. + pub fn distance(&self, other: &U) -> Distance + where + U: AsRef, + { + let a = U256::from_big_endian(self.0.as_slice()); + let b = U256::from_big_endian(other.as_ref().0.as_slice()); + Distance(a ^ b) + } + + /// Returns the uniquely determined key with the given distance to `self`. + /// + /// This implements the following equivalence: + /// + /// `self xor other = distance <==> other = self xor distance` + #[cfg(test)] + #[allow(deprecated)] + // TODO: remove `#[allow(deprecated)] once sha2-0.11 is released. + // See https://github.com/paritytech/litep2p/issues/449. + pub fn for_distance(&self, d: Distance) -> KeyBytes { + let key_int = U256::from_big_endian(self.0.as_slice()) ^ d.0; + KeyBytes(GenericArray::from(key_int.to_big_endian())) + } +} + +impl AsRef for KeyBytes { + fn as_ref(&self) -> &KeyBytes { + self + } +} + +/// A distance between two keys in the DHT keyspace. +#[derive(Copy, Clone, PartialEq, Eq, Default, PartialOrd, Ord, Debug)] +pub struct Distance(pub(super) U256); + +impl Distance { + /// Returns the integer part of the base 2 logarithm of the [`Distance`]. + /// + /// Returns `None` if the distance is zero. + pub fn ilog2(&self) -> Option { + (256 - self.0.leading_zeros()).checked_sub(1) + } +} + +/// Connection type to peer. +#[derive(Debug, Copy, Clone, PartialEq, Eq)] +pub enum ConnectionType { + /// Sender does not have a connection to peer. + NotConnected, + + /// Sender is connected to the peer. + Connected, + + /// Sender has recently been connected to the peer. + CanConnect, + + /// Sender is unable to connect to the peer. + CannotConnect, +} + +impl TryFrom for ConnectionType { + type Error = (); + + fn try_from(value: i32) -> Result { + match value { + 0 => Ok(ConnectionType::NotConnected), + 1 => Ok(ConnectionType::Connected), + 2 => Ok(ConnectionType::CanConnect), + 3 => Ok(ConnectionType::CannotConnect), + _ => Err(()), + } + } +} + +impl From for i32 { + fn from(connection: ConnectionType) -> Self { + match connection { + ConnectionType::NotConnected => 0, + ConnectionType::Connected => 1, + ConnectionType::CanConnect => 2, + ConnectionType::CannotConnect => 3, + } + } +} + +/// Kademlia peer. +#[derive(Debug, Clone)] +pub struct KademliaPeer { + /// Peer key. + pub(super) key: Key, + + /// Peer ID. + pub(super) peer: PeerId, + + /// Known addresses of peer. + pub(super) address_store: AddressStore, + + /// Connection type. + pub(super) connection: ConnectionType, +} + +impl KademliaPeer { + /// Create new [`KademliaPeer`]. + pub fn new(peer: PeerId, addresses: Vec, connection: ConnectionType) -> Self { + let mut address_store = AddressStore::new(); + + for address in addresses.into_iter() { + address_store.insert(AddressRecord::from_raw_multiaddr(address)); + } + + Self { + peer, + address_store, + connection, + key: Key::from(peer), + } + } + + /// Add the following addresses to the kademlia peer if there's enough space. + pub fn push_addresses(&mut self, addresses: impl IntoIterator) { + for address in addresses { + self.address_store.insert(AddressRecord::from_raw_multiaddr(address)); + } + } + + /// Returns the addresses of the peer. + pub fn addresses(&self) -> Vec { + self.address_store.addresses(MAX_ADDRESSES) + } +} + +impl TryFrom<&schema::kademlia::Peer> for KademliaPeer { + type Error = (); + + fn try_from(record: &schema::kademlia::Peer) -> Result { + let peer = PeerId::from_bytes(&record.id).map_err(|_| ())?; + + let mut address_store = AddressStore::new(); + for address in record.addrs.iter() { + let Ok(address) = Multiaddr::try_from(address.clone()) else { + continue; + }; + address_store.insert(AddressRecord::from_raw_multiaddr(address)); + } + + Ok(KademliaPeer { + key: Key::from(peer), + peer, + address_store, + connection: ConnectionType::try_from(record.connection)?, + }) + } +} + +impl From<&KademliaPeer> for schema::kademlia::Peer { + fn from(peer: &KademliaPeer) -> Self { + schema::kademlia::Peer { + id: peer.peer.to_bytes(), + addrs: peer + .address_store + .addresses(MAX_ADDRESSES) + .iter() + .map(|address| address.to_vec()) + .collect(), + connection: peer.connection.into(), + } + } +} diff --git a/client/litep2p/src/protocol/libp2p/mod.rs b/client/litep2p/src/protocol/libp2p/mod.rs new file mode 100644 index 00000000..765771ed --- /dev/null +++ b/client/litep2p/src/protocol/libp2p/mod.rs @@ -0,0 +1,26 @@ +// Copyright 2023 litep2p developers +// +// Permission is hereby granted, free of charge, to any person obtaining a +// copy of this software and associated documentation files (the "Software"), +// to deal in the Software without restriction, including without limitation +// the rights to use, copy, modify, merge, publish, distribute, sublicense, +// and/or sell copies of the Software, and to permit persons to whom the +// Software is furnished to do so, subject to the following conditions: +// +// The above copyright notice and this permission notice shall be included in +// all copies or substantial portions of the Software. +// +// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS +// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE +// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER +// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING +// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER +// DEALINGS IN THE SOFTWARE. + +//! Supported [`libp2p`](https://libp2p.io/) protocols. + +pub mod bitswap; +pub mod identify; +pub mod kademlia; +pub mod ping; diff --git a/client/litep2p/src/protocol/libp2p/ping/config.rs b/client/litep2p/src/protocol/libp2p/ping/config.rs new file mode 100644 index 00000000..1240513a --- /dev/null +++ b/client/litep2p/src/protocol/libp2p/ping/config.rs @@ -0,0 +1,144 @@ +// Copyright 2023 litep2p developers +// +// Permission is hereby granted, free of charge, to any person obtaining a +// copy of this software and associated documentation files (the "Software"), +// to deal in the Software without restriction, including without limitation +// the rights to use, copy, modify, merge, publish, distribute, sublicense, +// and/or sell copies of the Software, and to permit persons to whom the +// Software is furnished to do so, subject to the following conditions: +// +// The above copyright notice and this permission notice shall be included in +// all copies or substantial portions of the Software. +// +// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS +// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE +// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER +// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING +// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER +// DEALINGS IN THE SOFTWARE. + +use crate::{ + codec::ProtocolCodec, protocol::libp2p::ping::PingEvent, types::protocol::ProtocolName, + DEFAULT_CHANNEL_SIZE, +}; +use std::time::Duration; + +use futures::Stream; +use tokio::sync::mpsc::{channel, Sender}; +use tokio_stream::wrappers::ReceiverStream; + +/// IPFS Ping protocol name as a string. +pub const PROTOCOL_NAME: &str = "/ipfs/ping/1.0.0"; + +/// Size for `/ipfs/ping/1.0.0` payloads. +const PING_PAYLOAD_SIZE: usize = 32; + +/// Maximum PING failures. +const MAX_FAILURES: usize = 3; + +/// Ping interval must be set to < 10 secs, because litep2p versions before +/// reset the inbound substream if not receive +/// the payload within 10 seconds of opening the substream. +pub const PING_INTERVAL: Duration = Duration::from_secs(5); + +/// Ping configuration. +pub struct Config { + /// Protocol name. + pub(crate) protocol: ProtocolName, + + /// Codec used by the protocol. + pub(crate) codec: ProtocolCodec, + + /// Maximum failures before the peer is considered unreachable. + pub(crate) max_failures: usize, + + /// TX channel for sending events to the user protocol. + pub(crate) tx_event: Sender, + + pub(crate) ping_interval: Duration, +} + +impl Config { + /// Create new [`Config`] with default values. + /// + /// Returns a config that is given to `Litep2pConfig` and an event stream for [`PingEvent`]s. + pub fn default() -> (Self, Box + Send + Unpin>) { + let (tx_event, rx_event) = channel(DEFAULT_CHANNEL_SIZE); + + ( + Self { + tx_event, + ping_interval: PING_INTERVAL, + max_failures: MAX_FAILURES, + protocol: ProtocolName::from(PROTOCOL_NAME), + codec: ProtocolCodec::Identity(PING_PAYLOAD_SIZE), + }, + Box::new(ReceiverStream::new(rx_event)), + ) + } +} + +/// Ping configuration builder. +pub struct ConfigBuilder { + /// Protocol name. + protocol: ProtocolName, + + /// Codec used by the protocol. + codec: ProtocolCodec, + + /// Maximum failures before the peer is considered unreachable. + max_failures: usize, + + /// Interval between outbound pings. + ping_interval: Duration, +} + +impl Default for ConfigBuilder { + fn default() -> Self { + Self::new() + } +} + +impl ConfigBuilder { + /// Create new default [`Config`] which can be modified by the user. + pub fn new() -> Self { + Self { + ping_interval: PING_INTERVAL, + max_failures: MAX_FAILURES, + protocol: ProtocolName::from(PROTOCOL_NAME), + codec: ProtocolCodec::Identity(PING_PAYLOAD_SIZE), + } + } + + /// Set maximum failures the protocol. + pub fn with_max_failure(mut self, max_failures: usize) -> Self { + self.max_failures = max_failures; + self + } + + /// Set ping interval. + /// + /// The default is 5 seconds and should be kept like this for compatibility + /// with litep2p <= v0.13.0. + pub fn with_ping_interval(mut self, ping_interval: Duration) -> Self { + self.ping_interval = ping_interval; + self + } + + /// Build [`Config`]. + pub fn build(self) -> (Config, Box + Send + Unpin>) { + let (tx_event, rx_event) = channel(DEFAULT_CHANNEL_SIZE); + + ( + Config { + tx_event, + ping_interval: self.ping_interval, + max_failures: self.max_failures, + protocol: self.protocol, + codec: self.codec, + }, + Box::new(ReceiverStream::new(rx_event)), + ) + } +} diff --git a/client/litep2p/src/protocol/libp2p/ping/mod.rs b/client/litep2p/src/protocol/libp2p/ping/mod.rs new file mode 100644 index 00000000..db19ec6c --- /dev/null +++ b/client/litep2p/src/protocol/libp2p/ping/mod.rs @@ -0,0 +1,289 @@ +// Copyright 2023 litep2p developers +// +// Permission is hereby granted, free of charge, to any person obtaining a +// copy of this software and associated documentation files (the "Software"), +// to deal in the Software without restriction, including without limitation +// the rights to use, copy, modify, merge, publish, distribute, sublicense, +// and/or sell copies of the Software, and to permit persons to whom the +// Software is furnished to do so, subject to the following conditions: +// +// The above copyright notice and this permission notice shall be included in +// all copies or substantial portions of the Software. +// +// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS +// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE +// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER +// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING +// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER +// DEALINGS IN THE SOFTWARE. + +//! [`/ipfs/ping/1.0.0`](https://github.com/libp2p/specs/blob/master/ping/ping.md) implementation. + +use crate::{ + error::SubstreamError, + protocol::{Direction, TransportEvent, TransportService}, + substream::Substream, + types::SubstreamId, + PeerId, +}; + +use bytes::Bytes; +use futures::{ + stream::{self, BoxStream}, + FutureExt, StreamExt, +}; +use rand::Rng as _; +use std::{ + collections::HashSet, + time::{Duration, Instant}, +}; +use tokio::sync::mpsc; +use tokio_stream::StreamMap; + +pub use config::{Config, ConfigBuilder}; +mod config; + +// TODO: https://github.com/paritytech/litep2p/issues/132 let the user handle max failures + +/// Log target for the file. +const LOG_TARGET: &str = "litep2p::ipfs::ping"; + +/// Events emitted by the ping protocol. +#[derive(Debug)] +pub enum PingEvent { + /// Ping time with remote peer. + Ping { + /// Peer ID. + peer: PeerId, + + /// Measured ping time with the peer. + ping: Duration, + }, +} + +/// Ping protocol. +pub(crate) struct Ping { + /// Maximum failures before the peer is considered unreachable. + /// This must be at least 1 until is adopted + /// by the network. (With older litep2p every other ping fails.) + // TODO: use this to disconnect peers. + _max_failures: usize, + + /// Connection service. + service: TransportService, + + /// TX channel for sending events to the user protocol. + tx: mpsc::Sender, + + /// Local pingers per peer. + pingers: StreamMap>>, + + /// Substreams on which we retry pings after failure. Used for rate-limiting. + retries: HashSet, + + /// Ping responders per peer. + responders: StreamMap>>, + + /// Interval between outbound pings. + ping_interval: Duration, +} + +impl Ping { + /// Create new [`Ping`] protocol. + pub fn new(service: TransportService, config: Config) -> Self { + Self { + service, + tx: config.tx_event, + ping_interval: config.ping_interval, + pingers: StreamMap::new(), + retries: HashSet::new(), + responders: StreamMap::new(), + _max_failures: config.max_failures, + } + } + + /// Connection established to remote peer. + fn on_connection_established(&mut self, peer: PeerId) { + tracing::debug!(target: LOG_TARGET, ?peer, "connection established"); + + if let Err(error) = self.service.open_substream(peer) { + tracing::debug!(target: LOG_TARGET, ?peer, ?error, "failed to open substream"); + } + } + + /// Connection closed to remote peer. + fn on_connection_closed(&mut self, peer: PeerId) { + tracing::debug!(target: LOG_TARGET, ?peer, "connection closed"); + } + + /// Handle outbound substream. + fn on_outbound_substream( + &mut self, + peer: PeerId, + substream_id: SubstreamId, + substream: Substream, + ) { + tracing::trace!(target: LOG_TARGET, ?peer, "handle outbound substream"); + let interval = self.ping_interval; + let should_wait = self.retries.remove(&substream_id); + + let pinger_stream = stream::unfold( + (substream, should_wait), + move |(mut substream, should_wait)| async move { + if should_wait { + tokio::time::sleep(interval).await; + } + + let payload = Bytes::from(Vec::from(rand::thread_rng().gen::<[u8; 32]>())); + + let ping = async { + let now = Instant::now(); + + substream.send_framed(payload.clone()).await?; + let received = substream.next().await.ok_or(PingError::SubstreamError( + SubstreamError::ReadFailure(Some(substream_id)), + ))??; + + if received == payload { + Ok(now.elapsed()) + } else { + Err(PingError::InvalidPayload) + } + }; + + match tokio::time::timeout(Duration::from_secs(20), ping).await { + Ok(Ok(elapsed)) => Some((Ok(elapsed), (substream, true))), + Ok(Err(error)) => Some((Err(error), (substream, false))), + Err(timeout) => Some((Err(timeout.into()), (substream, false))), + } + }, + ); + + // We could overwrite the old pinger here if connection was closed then opened before the + // ping failed. + let _ = self.pingers.insert(peer, pinger_stream.boxed()); + } + + /// Handle inbound substream. + fn on_inbound_substream(&mut self, peer: PeerId, mut substream: Substream) { + tracing::trace!(target: LOG_TARGET, ?peer, "handle inbound substream"); + + let responder_future = async move { + loop { + if let Some(payload) = substream.next().await { + substream.send_framed(payload?.freeze()).await?; + } else { + return Ok(()); + } + } + }; + + if self.responders.insert(peer, responder_future.into_stream().boxed()).is_some() { + tracing::trace!( + target: LOG_TARGET, + ?peer, + "discarding ping substream as remote opened a new one", + ); + } + } + + /// Start [`Ping`] event loop. + pub async fn run(mut self) { + tracing::debug!(target: LOG_TARGET, "starting ping event loop"); + + loop { + tokio::select! { + event = self.service.next() => match event { + Some(TransportEvent::ConnectionEstablished { peer, .. }) => { + self.on_connection_established(peer); + } + Some(TransportEvent::ConnectionClosed { peer }) => { + self.on_connection_closed(peer); + } + Some(TransportEvent::SubstreamOpened { + peer, + substream, + direction, + .. + }) => match direction { + Direction::Inbound => { + self.on_inbound_substream(peer, substream); + } + Direction::Outbound(substream_id) => { + self.on_outbound_substream(peer, substream_id, substream); + } + } + Some(TransportEvent::SubstreamOpenFailure { + substream, + .. + }) => { + self.retries.remove(&substream); + } + Some(_) => {} + None => return, + }, + Some((peer, result)) = self.responders.next(), if !self.responders.is_empty() => { + // Remove the future from `StreamMap` to not wait untill it is polled again and + // removes it itself getting `None`. Otherwise we can get a confusing log + // message when try to insert a new responder for the same peer. + self.responders.remove(&peer); + + tracing::trace!( + target: LOG_TARGET, + ?peer, + ?result, + "inbound ping responder terminated", + ); + } + Some((peer, result)) = self.pingers.next(), if !self.pingers.is_empty() => { + match result { + Ok(elapsed) => { + tracing::debug!( + target: LOG_TARGET, + ?peer, + time_us = elapsed.as_micros(), + "pong", + ); + + let _ = self.tx.send(PingEvent::Ping { peer, ping: elapsed }).await; + } + Err(error) => { + self.pingers.remove(&peer); + + tracing::debug!( + target: LOG_TARGET, + ?peer, + ?error, + "ping failed", + ); + + match self.service.open_substream(peer) { + Ok(substream_id) => { + self.retries.insert(substream_id); + } + Err(error) => tracing::debug!( + target: LOG_TARGET, + ?peer, + ?error, + "failed to open substream after ping failed", + ), + } + } + } + } + } + } + } +} + +/// Possible error of the outbound ping. +#[derive(Debug, thiserror::Error)] +enum PingError { + #[error("Substream error: {0}")] + SubstreamError(#[from] SubstreamError), + #[error("Invalid payload received")] + InvalidPayload, + #[error("Timeout")] + Timeout(#[from] tokio::time::error::Elapsed), +} diff --git a/client/litep2p/src/protocol/libp2p/schema/bitswap.proto b/client/litep2p/src/protocol/libp2p/schema/bitswap.proto new file mode 100644 index 00000000..fa31a131 --- /dev/null +++ b/client/litep2p/src/protocol/libp2p/schema/bitswap.proto @@ -0,0 +1,46 @@ +// Bitswap 1.2.0 Wire Format + +syntax = "proto3"; + +package bitswap; + +message Wantlist { + enum WantType { + Block = 0; + Have = 1; + } + + message Entry { + bytes block = 1; // CID of the block + int32 priority = 2; // the priority (normalized). default to 1 + bool cancel = 3; // whether this revokes an entry + WantType wantType = 4; // Note: defaults to enum 0, ie Block + bool sendDontHave = 5; // Note: defaults to false + } + + repeated Entry entries = 1; // a list of wantlist entries + bool full = 2; // whether this is the full wantlist. default to false +} + +message Block { + bytes prefix = 1; // CID prefix (cid version, multicodec and multihash prefix (type + length) + bytes data = 2; +} + +enum BlockPresenceType { + Have = 0; + DontHave = 1; +} + +message BlockPresence { + bytes cid = 1; + BlockPresenceType type = 2; +} + +message Message { + Wantlist wantlist = 1; + repeated bytes blocks = 2; + repeated Block payload = 3; + repeated BlockPresence blockPresences = 4; + int32 pendingBytes = 5; +} diff --git a/client/litep2p/src/protocol/libp2p/schema/identify.proto b/client/litep2p/src/protocol/libp2p/schema/identify.proto new file mode 100644 index 00000000..2b522789 --- /dev/null +++ b/client/litep2p/src/protocol/libp2p/schema/identify.proto @@ -0,0 +1,12 @@ +syntax = "proto2"; + +package identify; + +message Identify { + optional string protocolVersion = 5; + optional string agentVersion = 6; + optional bytes publicKey = 1; + repeated bytes listenAddrs = 2; + optional bytes observedAddr = 4; + repeated string protocols = 3; +} diff --git a/client/litep2p/src/protocol/libp2p/schema/kademlia.proto b/client/litep2p/src/protocol/libp2p/schema/kademlia.proto new file mode 100644 index 00000000..f135a88d --- /dev/null +++ b/client/litep2p/src/protocol/libp2p/schema/kademlia.proto @@ -0,0 +1,90 @@ +syntax = "proto3"; + +package kademlia; + +// Record represents a dht record that contains a value +// for a key value pair +message Record { + // The key that references this record + bytes key = 1; + + // The actual value this record is storing + bytes value = 2; + + // Note: These fields were removed from the Record message + // hash of the authors public key + //optional string author = 3; + // A PKI signature for the key+value+author + //optional bytes signature = 4; + + // Time the record was received, set by receiver + string timeReceived = 5; + + // The original publisher of the record. + // Currently specific to rust-libp2p. + bytes publisher = 666; + + // The remaining TTL of the record, in seconds. + // Currently specific to rust-libp2p. + uint32 ttl = 777; +}; + +enum MessageType { + PUT_VALUE = 0; + GET_VALUE = 1; + ADD_PROVIDER = 2; + GET_PROVIDERS = 3; + FIND_NODE = 4; + PING = 5; +} + +enum ConnectionType { + // sender does not have a connection to peer, and no extra information (default) + NOT_CONNECTED = 0; + + // sender has a live connection to peer + CONNECTED = 1; + + // sender recently connected to peer + CAN_CONNECT = 2; + + // sender recently tried to connect to peer repeatedly but failed to connect + // ("try" here is loose, but this should signal "made strong effort, failed") + CANNOT_CONNECT = 3; +} + +message Peer { + // ID of a given peer. + bytes id = 1; + + // multiaddrs for a given peer + repeated bytes addrs = 2; + + // used to signal the sender's connection capabilities to the peer + ConnectionType connection = 3; +} + +message Message { + // defines what type of message it is. + MessageType type = 1; + + // defines what coral cluster level this query/response belongs to. + // in case we want to implement coral's cluster rings in the future. + int32 clusterLevelRaw = 10; // NOT USED + + // Used to specify the key associated with this message. + // PUT_VALUE, GET_VALUE, ADD_PROVIDER, GET_PROVIDERS + bytes key = 2; + + // Used to return a value + // PUT_VALUE, GET_VALUE + Record record = 3; + + // Used to return peers closer to a key in a query + // GET_VALUE, GET_PROVIDERS, FIND_NODE + repeated Peer closerPeers = 8; + + // Used to return Providers + // ADD_PROVIDER, GET_PROVIDERS + repeated Peer providerPeers = 9; +} diff --git a/client/litep2p/src/protocol/mdns.rs b/client/litep2p/src/protocol/mdns.rs new file mode 100644 index 00000000..f80e9356 --- /dev/null +++ b/client/litep2p/src/protocol/mdns.rs @@ -0,0 +1,463 @@ +// Copyright 2018 Parity Technologies (UK) Ltd. +// Copyright 2023 litep2p developers +// +// Permission is hereby granted, free of charge, to any person obtaining a +// copy of this software and associated documentation files (the "Software"), +// to deal in the Software without restriction, including without limitation +// the rights to use, copy, modify, merge, publish, distribute, sublicense, +// and/or sell copies of the Software, and to permit persons to whom the +// Software is furnished to do so, subject to the following conditions: +// +// The above copyright notice and this permission notice shall be included in +// all copies or substantial portions of the Software. +// +// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS +// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE +// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER +// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING +// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER +// DEALINGS IN THE SOFTWARE. + +//! [Multicast DNS](https://en.wikipedia.org/wiki/Multicast_DNS) implementation. + +use crate::{transport::manager::TransportManagerHandle, DEFAULT_CHANNEL_SIZE}; + +use futures::Stream; +use multiaddr::Multiaddr; +use rand::{distributions::Alphanumeric, Rng}; +use simple_dns::{ + rdata::{RData, PTR, TXT}, + Name, Packet, PacketFlag, Question, ResourceRecord, CLASS, QCLASS, QTYPE, TYPE, +}; +use socket2::{Domain, Protocol, Socket, Type}; +use tokio::{ + net::UdpSocket, + sync::mpsc::{channel, Sender}, +}; +use tokio_stream::wrappers::ReceiverStream; + +use std::{ + collections::HashSet, + net, + net::{IpAddr, Ipv4Addr, SocketAddr}, + sync::Arc, + time::Duration, +}; + +/// Logging target for the file. +const LOG_TARGET: &str = "litep2p::mdns"; + +/// IPv4 multicast address. +const IPV4_MULTICAST_ADDRESS: Ipv4Addr = Ipv4Addr::new(224, 0, 0, 251); + +/// IPV4 multicast port. +const IPV4_MULTICAST_PORT: u16 = 5353; + +/// Service name. +const SERVICE_NAME: &str = "_p2p._udp.local"; + +/// Events emitted by mDNS. +// #[derive(Debug, Clone)] +pub enum MdnsEvent { + /// One or more addresses discovered. + Discovered(Vec), +} + +/// mDNS configuration. +// #[derive(Debug)] +pub struct Config { + /// How often the network should be queried for new peers. + query_interval: Duration, + + /// TX channel for sending mDNS events to user. + tx: Sender, +} + +impl Config { + /// Create new [`Config`]. + /// + /// Return the configuration and an event stream for receiving [`MdnsEvent`]s. + pub fn new( + query_interval: Duration, + ) -> (Self, Box + Send + Unpin>) { + let (tx, rx) = channel(DEFAULT_CHANNEL_SIZE); + ( + Self { query_interval, tx }, + Box::new(ReceiverStream::new(rx)), + ) + } +} + +/// Main mDNS object. +pub(crate) struct Mdns { + /// Query interval. + query_interval: tokio::time::Interval, + + /// TX channel for sending events to user. + event_tx: Sender, + + /// Handle to `TransportManager`. + _transport_handle: TransportManagerHandle, + + // Username. + username: String, + + /// Next query ID. + next_query_id: u16, + + /// Buffer for incoming messages. + receive_buffer: Vec, + + /// Listen addresses. + listen_addresses: Vec>, + + /// Discovered addresses. + discovered: HashSet, +} + +impl Mdns { + /// Create new [`Mdns`]. + pub(crate) fn new( + _transport_handle: TransportManagerHandle, + config: Config, + listen_addresses: Vec, + ) -> Self { + let mut query_interval = tokio::time::interval(config.query_interval); + query_interval.set_missed_tick_behavior(tokio::time::MissedTickBehavior::Delay); + + Self { + _transport_handle, + event_tx: config.tx, + next_query_id: 1337u16, + discovered: HashSet::new(), + query_interval, + receive_buffer: vec![0u8; 4096], + username: rand::thread_rng() + .sample_iter(&Alphanumeric) + .take(32) + .map(char::from) + .collect(), + listen_addresses: listen_addresses + .into_iter() + .map(|address| format!("dnsaddr={address}").into()) + .collect(), + } + } + + /// Get next query ID. + fn next_query_id(&mut self) -> u16 { + let query_id = self.next_query_id; + self.next_query_id += 1; + + query_id + } + + /// Send mDNS query on the network. + async fn on_outbound_request(&mut self, socket: &UdpSocket) -> crate::Result<()> { + tracing::debug!(target: LOG_TARGET, "send outbound query"); + + let mut packet = Packet::new_query(self.next_query_id()); + + packet.questions.push(Question { + qname: Name::new_unchecked(SERVICE_NAME), + qtype: QTYPE::TYPE(TYPE::PTR), + qclass: QCLASS::CLASS(CLASS::IN), + unicast_response: false, + }); + + socket + .send_to( + &packet.build_bytes_vec().expect("valid packet"), + (IPV4_MULTICAST_ADDRESS, IPV4_MULTICAST_PORT), + ) + .await + .map(|_| ()) + .map_err(From::from) + } + + /// Handle inbound query. + fn on_inbound_request(&self, packet: Packet) -> Option> { + tracing::debug!(target: LOG_TARGET, ?packet, "handle inbound request"); + + let mut packet = Packet::new_reply(packet.id()); + let srv_name = Name::new_unchecked(SERVICE_NAME); + + packet.answers.push(ResourceRecord::new( + srv_name.clone(), + CLASS::IN, + 360, + RData::PTR(PTR(Name::new_unchecked(&self.username))), + )); + + for address in &self.listen_addresses { + let mut record = TXT::new(); + record.add_string(address).expect("valid string"); + + packet.additional_records.push(ResourceRecord { + name: Name::new_unchecked(&self.username), + class: CLASS::IN, + ttl: 360, + rdata: RData::TXT(record), + cache_flush: false, + }); + } + + Some(packet.build_bytes_vec().expect("valid packet")) + } + + /// Handle inbound response. + fn on_inbound_response(&self, packet: Packet) -> Vec { + tracing::debug!(target: LOG_TARGET, "handle inbound response"); + + let names = packet + .answers + .iter() + .filter_map(|answer| { + if answer.name != Name::new_unchecked(SERVICE_NAME) { + return None; + } + + match answer.rdata { + RData::PTR(PTR(ref name)) if name != &Name::new_unchecked(&self.username) => + Some(name), + _ => None, + } + }) + .collect::>(); + + let name = match names.len() { + 0 => return Vec::new(), + _ => { + tracing::debug!( + target: LOG_TARGET, + ?names, + "response name" + ); + + names[0] + } + }; + + packet + .additional_records + .iter() + .flat_map(|record| { + if &record.name != name { + return vec![]; + } + + // TODO: https://github.com/paritytech/litep2p/issues/333 + // `filter_map` is not necessary as there's at most one entry + match &record.rdata { + RData::TXT(text) => text + .attributes() + .iter() + .filter_map(|(_, address)| { + address.as_ref().and_then(|inner| inner.parse().ok()) + }) + .collect(), + _ => vec![], + } + }) + .collect() + } + + /// Setup the socket. + fn setup_socket() -> crate::Result { + let socket = Socket::new(Domain::IPV4, Type::DGRAM, Some(Protocol::UDP))?; + socket.set_reuse_address(true)?; + #[cfg(unix)] + socket.set_reuse_port(true)?; + socket.bind( + &SocketAddr::new(IpAddr::V4(Ipv4Addr::UNSPECIFIED), IPV4_MULTICAST_PORT).into(), + )?; + socket.set_multicast_loop_v4(true)?; + socket.set_multicast_ttl_v4(255)?; + socket.join_multicast_v4(&IPV4_MULTICAST_ADDRESS, &Ipv4Addr::UNSPECIFIED)?; + socket.set_nonblocking(true)?; + + UdpSocket::from_std(net::UdpSocket::from(socket)).map_err(Into::into) + } + + /// Event loop for [`Mdns`]. + pub(crate) async fn start(mut self) { + tracing::debug!(target: LOG_TARGET, "starting mdns event loop"); + + let mut socket_opt = None; + + loop { + let socket = match socket_opt.take() { + Some(s) => s, + None => { + let _ = self.query_interval.tick().await; + match Self::setup_socket() { + Ok(s) => s, + Err(error) => { + tracing::debug!( + target: LOG_TARGET, + ?error, + "failed to setup mDNS socket, will try again" + ); + continue; + } + } + } + }; + + tokio::select! { + _ = self.query_interval.tick() => { + tracing::trace!(target: LOG_TARGET, "query interval ticked"); + + if let Err(error) = self.on_outbound_request(&socket).await { + tracing::debug!(target: LOG_TARGET, ?error, "failed to send mdns query"); + // Let's recreate the socket + continue; + } + }, + + result = socket.recv_from(&mut self.receive_buffer) => match result { + Ok((nread, address)) => match Packet::parse(&self.receive_buffer[..nread]) { + Ok(packet) => match packet.has_flags(PacketFlag::RESPONSE) { + true => { + let to_forward = self.on_inbound_response(packet).into_iter().filter_map(|address| { + self.discovered.insert(address.clone()).then_some(address) + }) + .collect::>(); + + if !to_forward.is_empty() { + let _ = self.event_tx.send(MdnsEvent::Discovered(to_forward)).await; + } + } + false => if let Some(response) = self.on_inbound_request(packet) { + if let Err(error) = socket + .send_to(&response, (IPV4_MULTICAST_ADDRESS, IPV4_MULTICAST_PORT)) + .await { + tracing::debug!(target: LOG_TARGET, ?error, "failed to send mdns response"); + // Let's recreate the socket + continue; + } + } + } + Err(error) => tracing::debug!( + target: LOG_TARGET, + ?address, + ?error, + ?nread, + "failed to parse mdns packet" + ), + } + Err(error) => { + tracing::debug!(target: LOG_TARGET, ?error, "failed to read from socket"); + // Let's recreate the socket + continue; + } + }, + }; + + socket_opt = Some(socket); + } + } +} + +#[cfg(test)] +mod tests { + use super::*; + use crate::transport::manager::TransportManagerBuilder; + use futures::StreamExt; + use multiaddr::Protocol; + + #[tokio::test] + async fn mdns_works() { + let _ = tracing_subscriber::fmt() + .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) + .try_init(); + + let (config1, mut stream1) = Config::new(Duration::from_secs(5)); + let manager1 = TransportManagerBuilder::new().build(); + + let mdns1 = Mdns::new( + manager1.transport_manager_handle(), + config1, + vec![ + "/ip6/::1/tcp/8888/p2p/12D3KooWNP463TyS3vUpmekjjZ2dg7xy1WHNMM7MqfsMevMTaaaa" + .parse() + .unwrap(), + "/ip4/127.0.0.1/tcp/8888/p2p/12D3KooWNP463TyS3vUpmekjjZ2dg7xy1WHNMM7MqfsMevMTaaaa" + .parse() + .unwrap(), + ], + ); + + let (config2, mut stream2) = Config::new(Duration::from_secs(5)); + let manager2 = TransportManagerBuilder::new().build(); + + let mdns2 = Mdns::new( + manager2.transport_manager_handle(), + config2, + vec![ + "/ip6/::1/tcp/9999/p2p/12D3KooWNP463TyS3vUpmekjjZ2dg7xy1WHNMM7MqfsMevMTbbbb" + .parse() + .unwrap(), + "/ip4/127.0.0.1/tcp/9999/p2p/12D3KooWNP463TyS3vUpmekjjZ2dg7xy1WHNMM7MqfsMevMTbbbb" + .parse() + .unwrap(), + ], + ); + + tokio::spawn(mdns1.start()); + tokio::spawn(mdns2.start()); + + let mut peer1_discovered = false; + let mut peer2_discovered = false; + + while !peer1_discovered && !peer2_discovered { + tokio::select! { + event = stream1.next() => match event.unwrap() { + MdnsEvent::Discovered(addrs) => { + if addrs.len() == 2 { + let mut iter = addrs[0].iter(); + + if !std::matches!(iter.next(), Some(Protocol::Ip4(_) | Protocol::Ip6(_))) { + continue + } + + match iter.next() { + Some(Protocol::Tcp(port)) => { + if port != 9999 { + continue + } + } + _ => continue, + } + + peer1_discovered = true; + } + } + }, + event = stream2.next() => match event.unwrap() { + MdnsEvent::Discovered(addrs) => { + if addrs.len() == 2 { + let mut iter = addrs[0].iter(); + + if !std::matches!(iter.next(), Some(Protocol::Ip4(_) | Protocol::Ip6(_))) { + continue + } + + match iter.next() { + Some(Protocol::Tcp(port)) => { + if port != 8888 { + continue + } + } + _ => continue, + } + + peer2_discovered = true; + } + } + } + } + } + } +} diff --git a/client/litep2p/src/protocol/mod.rs b/client/litep2p/src/protocol/mod.rs new file mode 100644 index 00000000..e2da261f --- /dev/null +++ b/client/litep2p/src/protocol/mod.rs @@ -0,0 +1,143 @@ +// Copyright 2023 litep2p developers +// +// Permission is hereby granted, free of charge, to any person obtaining a +// copy of this software and associated documentation files (the "Software"), +// to deal in the Software without restriction, including without limitation +// the rights to use, copy, modify, merge, publish, distribute, sublicense, +// and/or sell copies of the Software, and to permit persons to whom the +// Software is furnished to do so, subject to the following conditions: +// +// The above copyright notice and this permission notice shall be included in +// all copies or substantial portions of the Software. +// +// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS +// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE +// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER +// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING +// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER +// DEALINGS IN THE SOFTWARE. + +//! Protocol-related defines. + +use crate::{ + codec::ProtocolCodec, + error::SubstreamError, + substream::Substream, + transport::Endpoint, + types::{protocol::ProtocolName, SubstreamId}, + PeerId, +}; + +use multiaddr::Multiaddr; + +use std::fmt::Debug; + +pub(crate) use connection::Permit; +pub(crate) use protocol_set::{InnerTransportEvent, ProtocolCommand, ProtocolSet}; + +pub use transport_service::{SubstreamKeepAlive, TransportService}; + +pub mod libp2p; +pub mod mdns; +pub mod notification; +pub mod request_response; + +mod connection; +mod protocol_set; +mod transport_service; + +/// Substream direction. +#[derive(Debug, Copy, Clone, Hash, PartialEq, Eq)] +pub enum Direction { + /// Substream was opened by the remote peer. + Inbound, + + /// Substream was opened by the local peer. + Outbound(SubstreamId), +} + +/// Events emitted by one of the installed transports to protocol(s). +#[derive(Debug)] +pub enum TransportEvent { + /// Connection established to `peer`. + ConnectionEstablished { + /// Peer ID. + peer: PeerId, + + /// Endpoint. + endpoint: Endpoint, + }, + + /// Connection closed to peer. + ConnectionClosed { + /// Peer ID. + peer: PeerId, + }, + + /// Failed to dial peer. + /// + /// This is reported to that protocol which initiated the connection. + DialFailure { + /// Peer ID. + peer: PeerId, + + /// Dialed addresseses. + addresses: Vec, + }, + + /// Substream opened for `peer`. + SubstreamOpened { + /// Peer ID. + peer: PeerId, + + /// Protocol name. + /// + /// One protocol handler may handle multiple sub-protocols (such as `/ipfs/identify/1.0.0` + /// and `/ipfs/identify/push/1.0.0`) or it may have aliases which should be handled by + /// the same protocol handler. When the substream is sent from transport to the protocol + /// handler, the protocol name that was used to negotiate the substream is also sent so + /// the protocol can handle the substream appropriately. + protocol: ProtocolName, + + /// Fallback protocol. + fallback: Option, + + /// Substream direction. + /// + /// Informs the protocol whether the substream is inbound (opened by the remote node) + /// or outbound (opened by the local node). This allows the protocol to distinguish + /// between the two types of substreams and execute correct code for the substream. + /// + /// Outbound substreams also contain the substream ID which allows the protocol to + /// distinguish between different outbound substreams. + direction: Direction, + + /// Substream. + substream: Substream, + }, + + /// Failed to open substream. + /// + /// Substream open failures are reported only for outbound substreams. + SubstreamOpenFailure { + /// Substream ID. + substream: SubstreamId, + + /// Error that occurred when the substream was being opened. + error: SubstreamError, + }, +} + +/// Trait defining the interface for a user protocol. +#[async_trait::async_trait] +pub trait UserProtocol: Send { + /// Get user protocol name. + fn protocol(&self) -> ProtocolName; + + /// Get user protocol codec. + fn codec(&self) -> ProtocolCodec; + + /// Start the the user protocol event loop. + async fn run(self: Box, service: TransportService) -> crate::Result<()>; +} diff --git a/client/litep2p/src/protocol/notification/config.rs b/client/litep2p/src/protocol/notification/config.rs new file mode 100644 index 00000000..b9dedc14 --- /dev/null +++ b/client/litep2p/src/protocol/notification/config.rs @@ -0,0 +1,257 @@ +// Copyright 2023 litep2p developers +// +// Permission is hereby granted, free of charge, to any person obtaining a +// copy of this software and associated documentation files (the "Software"), +// to deal in the Software without restriction, including without limitation +// the rights to use, copy, modify, merge, publish, distribute, sublicense, +// and/or sell copies of the Software, and to permit persons to whom the +// Software is furnished to do so, subject to the following conditions: +// +// The above copyright notice and this permission notice shall be included in +// all copies or substantial portions of the Software. +// +// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS +// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE +// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER +// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING +// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER +// DEALINGS IN THE SOFTWARE. + +use crate::{ + codec::ProtocolCodec, + protocol::notification::{ + handle::NotificationHandle, + types::{ + InnerNotificationEvent, NotificationCommand, ASYNC_CHANNEL_SIZE, SYNC_CHANNEL_SIZE, + }, + }, + types::protocol::ProtocolName, + PeerId, DEFAULT_CHANNEL_SIZE, +}; + +use bytes::BytesMut; +use parking_lot::RwLock; +use tokio::sync::mpsc::{channel, Receiver, Sender}; + +use std::sync::Arc; + +/// Notification configuration. +#[derive(Debug)] +pub struct Config { + /// Protocol name. + pub(crate) protocol_name: ProtocolName, + + /// Protocol codec. + pub(crate) codec: ProtocolCodec, + + /// Maximum notification size. + _max_notification_size: usize, + + /// Handshake bytes. + pub(crate) handshake: Arc>>, + + /// Auto accept inbound substream. + pub(super) auto_accept: bool, + + /// Protocol aliases. + pub(crate) fallback_names: Vec, + + /// TX channel passed to the protocol used for sending events. + pub(crate) event_tx: Sender, + + /// TX channel for sending notifications from the connection handlers. + pub(crate) notif_tx: Sender<(PeerId, BytesMut)>, + + /// RX channel passed to the protocol used for receiving commands. + pub(crate) command_rx: Receiver, + + /// Synchronous channel size. + pub(crate) sync_channel_size: usize, + + /// Asynchronous channel size. + pub(crate) async_channel_size: usize, + + /// Should `NotificationProtocol` dial the peer if there is no connection to them + /// when an outbound substream is requested. + pub(crate) should_dial: bool, +} + +impl Config { + /// Create new [`Config`]. + pub fn new( + protocol_name: ProtocolName, + max_notification_size: usize, + handshake: Vec, + fallback_names: Vec, + auto_accept: bool, + sync_channel_size: usize, + async_channel_size: usize, + should_dial: bool, + ) -> (Self, NotificationHandle) { + let (event_tx, event_rx) = channel(DEFAULT_CHANNEL_SIZE); + let (notif_tx, notif_rx) = channel(DEFAULT_CHANNEL_SIZE); + let (command_tx, command_rx) = channel(DEFAULT_CHANNEL_SIZE); + let handshake = Arc::new(RwLock::new(handshake)); + let handle = + NotificationHandle::new(event_rx, notif_rx, command_tx, Arc::clone(&handshake)); + + ( + Self { + protocol_name, + codec: ProtocolCodec::UnsignedVarint(Some(max_notification_size)), + _max_notification_size: max_notification_size, + auto_accept, + handshake, + fallback_names, + event_tx, + notif_tx, + command_rx, + should_dial, + sync_channel_size, + async_channel_size, + }, + handle, + ) + } + + /// Get protocol name. + pub(crate) fn protocol_name(&self) -> &ProtocolName { + &self.protocol_name + } + + /// Set handshake for the protocol. + /// + /// This function is used to work around an issue in Polkadot SDK and users + /// should not depend on its continued existence. + pub fn set_handshake(&mut self, handshake: Vec) { + let mut inner = self.handshake.write(); + *inner = handshake; + } +} + +/// Notification configuration builder. +pub struct ConfigBuilder { + /// Protocol name. + protocol_name: ProtocolName, + + /// Maximum notification size. + max_notification_size: Option, + + /// Handshake bytes. + handshake: Option>, + + /// Should `NotificationProtocol` dial the peer if an outbound substream is requested but there + /// is no connection to the peer. + should_dial: bool, + + /// Fallback names. + fallback_names: Vec, + + /// Auto accept inbound substream. + auto_accept_inbound_for_initiated: bool, + + /// Synchronous channel size. + sync_channel_size: usize, + + /// Asynchronous channel size. + async_channel_size: usize, +} + +impl ConfigBuilder { + /// Create new [`ConfigBuilder`]. + pub fn new(protocol_name: ProtocolName) -> Self { + Self { + protocol_name, + max_notification_size: None, + handshake: None, + fallback_names: Vec::new(), + auto_accept_inbound_for_initiated: false, + sync_channel_size: SYNC_CHANNEL_SIZE, + async_channel_size: ASYNC_CHANNEL_SIZE, + should_dial: true, + } + } + + /// Set maximum notification size. + pub fn with_max_size(mut self, max_notification_size: usize) -> Self { + self.max_notification_size = Some(max_notification_size); + self + } + + /// Set handshake. + pub fn with_handshake(mut self, handshake: Vec) -> Self { + self.handshake = Some(handshake); + self + } + + /// Set fallback names. + pub fn with_fallback_names(mut self, fallback_names: Vec) -> Self { + self.fallback_names = fallback_names; + self + } + + /// Auto-accept inbound substreams for those connections which were initiated by the local + /// node. + /// + /// Connection in this context means a bidirectional substream pair between two peers over a + /// given protocol. + /// + /// By default, when a node starts a connection with a remote node and opens an outbound + /// substream to them, that substream is validated and if it's accepted, remote node sends + /// their handshake over that substream and opens another substream to local node. The + /// substream that was opened by the local node is used for sending data and the one opened + /// by the remote node is used for receiving data. + /// + /// By default, even if the local node was the one that opened the first substream, this inbound + /// substream coming from remote node must be validated as the handshake of the remote node + /// may reveal that it's not someone that the local node is willing to accept. + /// + /// To disable this behavior, auto accepting for the inbound substream can be enabled. If local + /// node is the one that opened the connection and it was accepted by the remote node, local + /// node is only notified via + /// [`NotificationStreamOpened`](super::types::NotificationEvent::NotificationStreamOpened). + pub fn with_auto_accept_inbound(mut self, auto_accept: bool) -> Self { + self.auto_accept_inbound_for_initiated = auto_accept; + self + } + + /// Configure size of the channel for sending synchronous notifications. + /// + /// Default value is `16`. + pub fn with_sync_channel_size(mut self, size: usize) -> Self { + self.sync_channel_size = size; + self + } + + /// Configure size of the channel for sending asynchronous notifications. + /// + /// Default value is `8`. + pub fn with_async_channel_size(mut self, size: usize) -> Self { + self.async_channel_size = size; + self + } + + /// Should `NotificationProtocol` attempt to dial the peer if an outbound substream is opened + /// but no connection to the peer exist. + /// + /// Dialing is enabled by default. + pub fn with_dialing_enabled(mut self, should_dial: bool) -> Self { + self.should_dial = should_dial; + self + } + + /// Build notification configuration. + pub fn build(mut self) -> (Config, NotificationHandle) { + Config::new( + self.protocol_name, + self.max_notification_size.take().expect("notification size to be specified"), + self.handshake.take().expect("handshake to be specified"), + self.fallback_names, + self.auto_accept_inbound_for_initiated, + self.sync_channel_size, + self.async_channel_size, + self.should_dial, + ) + } +} diff --git a/client/litep2p/src/protocol/notification/connection.rs b/client/litep2p/src/protocol/notification/connection.rs new file mode 100644 index 00000000..4c140d2b --- /dev/null +++ b/client/litep2p/src/protocol/notification/connection.rs @@ -0,0 +1,271 @@ +// Copyright 2023 litep2p developers +// +// Permission is hereby granted, free of charge, to any person obtaining a +// copy of this software and associated documentation files (the "Software"), +// to deal in the Software without restriction, including without limitation +// the rights to use, copy, modify, merge, publish, distribute, sublicense, +// and/or sell copies of the Software, and to permit persons to whom the +// Software is furnished to do so, subject to the following conditions: +// +// The above copyright notice and this permission notice shall be included in +// all copies or substantial portions of the Software. +// +// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS +// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE +// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER +// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING +// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER +// DEALINGS IN THE SOFTWARE. + +use crate::{ + protocol::notification::handle::NotificationEventHandle, substream::Substream, PeerId, +}; + +use bytes::BytesMut; +use futures::{FutureExt, SinkExt, Stream, StreamExt}; +use tokio::sync::{ + mpsc::{Receiver, Sender}, + oneshot, +}; +use tokio_util::sync::PollSender; + +use std::{ + pin::Pin, + task::{Context, Poll}, +}; + +/// Logging target for the file. +const LOG_TARGET: &str = "litep2p::notification::connection"; + +/// Bidirectional substream pair representing a connection to a remote peer. +pub(crate) struct Connection { + /// Remote peer ID. + peer: PeerId, + + /// Inbound substreams for receiving notifications. + inbound: Substream, + + /// Outbound substream for sending notifications. + outbound: Substream, + + /// Handle for sending notification events to user. + event_handle: NotificationEventHandle, + + /// TX channel used to notify [`NotificationProtocol`](super::NotificationProtocol) + /// that the connection has been closed. + conn_closed_tx: Sender, + + /// TX channel for sending notifications. + notif_tx: PollSender<(PeerId, BytesMut)>, + + /// Receiver for asynchronously sent notifications. + async_rx: Receiver>, + + /// Receiver for synchronously sent notifications. + sync_rx: Receiver>, + + /// Oneshot receiver used by [`NotificationProtocol`](super::NotificationProtocol) + /// to signal that local node wishes the close the connection. + rx: oneshot::Receiver<()>, + + /// Next notification to send, if any. + next_notification: Option>, +} + +/// Notify [`NotificationProtocol`](super::NotificationProtocol) that the connection was closed. +#[derive(Debug)] +pub enum NotifyProtocol { + /// Notify the protocol handler. + Yes, + + /// Do not notify protocol handler. + No, +} + +impl Connection { + /// Create new [`Connection`]. + pub(crate) fn new( + peer: PeerId, + inbound: Substream, + outbound: Substream, + event_handle: NotificationEventHandle, + conn_closed_tx: Sender, + notif_tx: Sender<(PeerId, BytesMut)>, + async_rx: Receiver>, + sync_rx: Receiver>, + ) -> (Self, oneshot::Sender<()>) { + let (tx, rx) = oneshot::channel(); + + ( + Self { + rx, + peer, + sync_rx, + async_rx, + inbound, + outbound, + event_handle, + conn_closed_tx, + next_notification: None, + notif_tx: PollSender::new(notif_tx), + }, + tx, + ) + } + + /// Connection closed, clean up state. + /// + /// If [`NotificationProtocol`](super::NotificationProtocol) was the one that initiated + /// shut down, it's not notified of connection getting closed. + async fn close_connection(self, notify_protocol: NotifyProtocol) { + tracing::trace!( + target: LOG_TARGET, + peer = ?self.peer, + ?notify_protocol, + "close notification protocol", + ); + + let _ = self.inbound.close().await; + let _ = self.outbound.close().await; + + if std::matches!(notify_protocol, NotifyProtocol::Yes) { + let _ = self.conn_closed_tx.send(self.peer).await; + } + + self.event_handle.report_notification_stream_closed(self.peer).await; + } + + pub async fn start(mut self) { + tracing::debug!( + target: LOG_TARGET, + peer = ?self.peer, + "start connection event loop", + ); + + loop { + match self.next().await { + None + | Some(ConnectionEvent::CloseConnection { + notify: NotifyProtocol::Yes, + }) => return self.close_connection(NotifyProtocol::Yes).await, + Some(ConnectionEvent::CloseConnection { + notify: NotifyProtocol::No, + }) => return self.close_connection(NotifyProtocol::No).await, + Some(ConnectionEvent::NotificationReceived { notification }) => { + if let Err(_) = self.notif_tx.send_item((self.peer, notification)) { + return self.close_connection(NotifyProtocol::Yes).await; + } + } + } + } + } +} + +/// Connection events. +pub enum ConnectionEvent { + /// Close connection. + /// + /// If `NotificationProtocol` requested [`Connection`] to be closed, it doesn't need to be + /// notified. If, on the other hand, connection closes because it encountered an error or one + /// of the substreams was closed, `NotificationProtocol` must be informed so it can inform the + /// user. + CloseConnection { + /// Whether to notify `NotificationProtocol` or not. + notify: NotifyProtocol, + }, + + /// Notification read from the inbound substream. + /// + /// NOTE: [`Connection`] uses `PollSender::send_item()` to send the notification to user. + /// `PollSender::poll_reserve()` must be called before calling `PollSender::send_item()` or it + /// will panic. `PollSender::poll_reserve()` is called in the `Stream` implementation below + /// before polling the inbound substream to ensure the channel has capacity to receive a + /// notification. + NotificationReceived { + /// Notification. + notification: BytesMut, + }, +} + +impl Stream for Connection { + type Item = ConnectionEvent; + + fn poll_next(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll> { + let this = Pin::into_inner(self); + + if let Poll::Ready(_) = this.rx.poll_unpin(cx) { + return Poll::Ready(Some(ConnectionEvent::CloseConnection { + notify: NotifyProtocol::No, + })); + } + + loop { + let notification = match this.next_notification.take() { + Some(notification) => Some(notification), + None => { + let future = async { + tokio::select! { + notification = this.async_rx.recv() => notification, + notification = this.sync_rx.recv() => notification, + } + }; + futures::pin_mut!(future); + + match future.poll_unpin(cx) { + Poll::Pending => None, + Poll::Ready(None) => + return Poll::Ready(Some(ConnectionEvent::CloseConnection { + notify: NotifyProtocol::Yes, + })), + Poll::Ready(Some(notification)) => Some(notification), + } + } + }; + + let Some(notification) = notification else { + break; + }; + + match this.outbound.poll_ready_unpin(cx) { + Poll::Ready(Ok(())) => {} + Poll::Pending => { + this.next_notification = Some(notification); + break; + } + Poll::Ready(Err(_)) => + return Poll::Ready(Some(ConnectionEvent::CloseConnection { + notify: NotifyProtocol::Yes, + })), + } + + if let Err(_) = this.outbound.start_send_unpin(notification.into()) { + return Poll::Ready(Some(ConnectionEvent::CloseConnection { + notify: NotifyProtocol::Yes, + })); + } + } + + match this.outbound.poll_flush_unpin(cx) { + Poll::Ready(Err(_)) => + return Poll::Ready(Some(ConnectionEvent::CloseConnection { + notify: NotifyProtocol::Yes, + })), + Poll::Ready(Ok(())) | Poll::Pending => {} + } + + if let Err(_) = futures::ready!(this.notif_tx.poll_reserve(cx)) { + return Poll::Ready(Some(ConnectionEvent::CloseConnection { + notify: NotifyProtocol::Yes, + })); + } + + match futures::ready!(this.inbound.poll_next_unpin(cx)) { + None | Some(Err(_)) => Poll::Ready(Some(ConnectionEvent::CloseConnection { + notify: NotifyProtocol::Yes, + })), + Some(Ok(notification)) => + Poll::Ready(Some(ConnectionEvent::NotificationReceived { notification })), + } + } +} diff --git a/client/litep2p/src/protocol/notification/handle.rs b/client/litep2p/src/protocol/notification/handle.rs new file mode 100644 index 00000000..f43a90d1 --- /dev/null +++ b/client/litep2p/src/protocol/notification/handle.rs @@ -0,0 +1,523 @@ +// Copyright 2023 litep2p developers +// +// Permission is hereby granted, free of charge, to any person obtaining a +// copy of this software and associated documentation files (the "Software"), +// to deal in the Software without restriction, including without limitation +// the rights to use, copy, modify, merge, publish, distribute, sublicense, +// and/or sell copies of the Software, and to permit persons to whom the +// Software is furnished to do so, subject to the following conditions: +// +// The above copyright notice and this permission notice shall be included in +// all copies or substantial portions of the Software. +// +// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS +// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE +// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER +// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING +// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER +// DEALINGS IN THE SOFTWARE. + +use crate::{ + error::Error, + protocol::notification::types::{ + Direction, InnerNotificationEvent, NotificationCommand, NotificationError, + NotificationEvent, ValidationResult, + }, + types::protocol::ProtocolName, + PeerId, +}; + +use bytes::BytesMut; +use futures::Stream; +use parking_lot::RwLock; +use tokio::sync::{ + mpsc::{error::TrySendError, Receiver, Sender}, + oneshot, +}; + +use std::{ + collections::{HashMap, HashSet}, + pin::Pin, + sync::Arc, + task::{Context, Poll}, +}; + +/// Logging target for the file. +const LOG_TARGET: &str = "litep2p::notification::handle"; + +#[derive(Debug, Clone)] +pub(crate) struct NotificationEventHandle { + tx: Sender, +} + +impl NotificationEventHandle { + /// Create new [`NotificationEventHandle`]. + pub(crate) fn new(tx: Sender) -> Self { + Self { tx } + } + + /// Validate inbound substream. + pub(crate) async fn report_inbound_substream( + &self, + protocol: ProtocolName, + fallback: Option, + peer: PeerId, + handshake: Vec, + tx: oneshot::Sender, + ) { + let _ = self + .tx + .send(InnerNotificationEvent::ValidateSubstream { + protocol, + fallback, + peer, + handshake, + tx, + }) + .await; + } + + /// Notification stream opened. + pub(crate) async fn report_notification_stream_opened( + &self, + protocol: ProtocolName, + fallback: Option, + direction: Direction, + peer: PeerId, + handshake: Vec, + sink: NotificationSink, + ) { + let _ = self + .tx + .send(InnerNotificationEvent::NotificationStreamOpened { + protocol, + fallback, + direction, + peer, + handshake, + sink, + }) + .await; + } + + /// Notification stream closed. + pub(crate) async fn report_notification_stream_closed(&self, peer: PeerId) { + let _ = self.tx.send(InnerNotificationEvent::NotificationStreamClosed { peer }).await; + } + + /// Failed to open notification stream. + pub(crate) async fn report_notification_stream_open_failure( + &self, + peer: PeerId, + error: NotificationError, + ) { + let _ = self + .tx + .send(InnerNotificationEvent::NotificationStreamOpenFailure { peer, error }) + .await; + } +} + +/// Notification sink. +/// +/// Allows the user to send notifications both synchronously and asynchronously. +#[derive(Debug, Clone)] +pub struct NotificationSink { + /// Peer ID. + peer: PeerId, + + /// TX channel for sending notifications synchronously. + sync_tx: Sender>, + + /// TX channel for sending notifications asynchronously. + async_tx: Sender>, +} + +impl NotificationSink { + /// Create new [`NotificationSink`]. + pub(crate) fn new(peer: PeerId, sync_tx: Sender>, async_tx: Sender>) -> Self { + Self { + peer, + async_tx, + sync_tx, + } + } + + /// Send notification to `peer` synchronously. + /// + /// If the channel is clogged, [`NotificationError::ChannelClogged`] is returned. + pub fn send_sync_notification(&self, notification: Vec) -> Result<(), NotificationError> { + self.sync_tx.try_send(notification).map_err(|error| match error { + TrySendError::Closed(_) => NotificationError::NoConnection, + TrySendError::Full(_) => NotificationError::ChannelClogged, + }) + } + + /// Send notification to `peer` asynchronously, waiting for the channel to have capacity + /// if it's clogged. + /// + /// Returns [`Error::PeerDoesntExist(PeerId)`](crate::error::Error::PeerDoesntExist) + /// if the connection has been closed. + pub async fn send_async_notification(&self, notification: Vec) -> crate::Result<()> { + self.async_tx + .send(notification) + .await + .map_err(|_| Error::PeerDoesntExist(self.peer)) + } +} + +/// Handle allowing the user protocol to interact with the notification protocol. +#[derive(Debug)] +pub struct NotificationHandle { + /// RX channel for receiving events from the notification protocol. + event_rx: Receiver, + + /// RX channel for receiving notifications from connection handlers. + notif_rx: Receiver<(PeerId, BytesMut)>, + + /// TX channel for sending commands to the notification protocol. + command_tx: Sender, + + /// Peers. + peers: HashMap, + + /// Clogged peers. + clogged: HashSet, + + /// Pending validations. + pending_validations: HashMap>, + + /// Handshake. + handshake: Arc>>, +} + +impl NotificationHandle { + /// Create new [`NotificationHandle`]. + pub(crate) fn new( + event_rx: Receiver, + notif_rx: Receiver<(PeerId, BytesMut)>, + command_tx: Sender, + handshake: Arc>>, + ) -> Self { + Self { + event_rx, + notif_rx, + command_tx, + handshake, + peers: HashMap::new(), + clogged: HashSet::new(), + pending_validations: HashMap::new(), + } + } + + /// Open substream to `peer`. + /// + /// Returns [`Error::PeerAlreadyExists(PeerId)`](crate::error::Error::PeerAlreadyExists) if + /// substream is already open to `peer`. + /// + /// If connection to peer is closed, `NotificationProtocol` tries to dial the peer and if the + /// dial succeeds, tries to open a substream. This behavior can be disabled with + /// [`ConfigBuilder::with_dialing_enabled(false)`](super::config::ConfigBuilder::with_dialing_enabled()). + pub async fn open_substream(&self, peer: PeerId) -> crate::Result<()> { + tracing::trace!(target: LOG_TARGET, ?peer, "open substream"); + + if self.peers.contains_key(&peer) { + return Err(Error::PeerAlreadyExists(peer)); + } + + self.command_tx + .send(NotificationCommand::OpenSubstream { + peers: HashSet::from_iter([peer]), + }) + .await + .map_or(Ok(()), |_| Ok(())) + } + + /// Open substreams to multiple peers. + /// + /// Similar to [`NotificationHandle::open_substream()`] but multiple substreams are initiated + /// using a single call to `NotificationProtocol`. + /// + /// Peers who are already connected are ignored and returned as `Err(HashSet>)`. + pub async fn open_substream_batch( + &self, + peers: impl Iterator, + ) -> Result<(), HashSet> { + let (to_add, to_ignore): (Vec<_>, Vec<_>) = peers + .map(|peer| match self.peers.contains_key(&peer) { + true => (None, Some(peer)), + false => (Some(peer), None), + }) + .unzip(); + + let to_add = to_add.into_iter().flatten().collect::>(); + let to_ignore = to_ignore.into_iter().flatten().collect::>(); + + tracing::trace!( + target: LOG_TARGET, + peers_to_add = ?to_add.len(), + peers_to_ignore = ?to_ignore.len(), + "open substream", + ); + + let _ = self.command_tx.send(NotificationCommand::OpenSubstream { peers: to_add }).await; + + match to_ignore.is_empty() { + true => Ok(()), + false => Err(to_ignore), + } + } + + /// Try to open substreams to multiple peers. + /// + /// Similar to [`NotificationHandle::open_substream()`] but multiple substreams are initiated + /// using a single call to `NotificationProtocol`. + /// + /// If the channel is clogged, peers for whom a connection is not yet open are returned as + /// `Err(HashSet)`. + pub fn try_open_substream_batch( + &self, + peers: impl Iterator, + ) -> Result<(), HashSet> { + let (to_add, to_ignore): (Vec<_>, Vec<_>) = peers + .map(|peer| match self.peers.contains_key(&peer) { + true => (None, Some(peer)), + false => (Some(peer), None), + }) + .unzip(); + + let to_add = to_add.into_iter().flatten().collect::>(); + let to_ignore = to_ignore.into_iter().flatten().collect::>(); + + tracing::trace!( + target: LOG_TARGET, + peers_to_add = ?to_add.len(), + peers_to_ignore = ?to_ignore.len(), + "open substream", + ); + + self.command_tx + .try_send(NotificationCommand::OpenSubstream { + peers: to_add.clone(), + }) + .map_err(|_| to_add) + } + + /// Close substream to `peer`. + pub async fn close_substream(&self, peer: PeerId) { + tracing::trace!(target: LOG_TARGET, ?peer, "close substream"); + + if !self.peers.contains_key(&peer) { + return; + } + + let _ = self + .command_tx + .send(NotificationCommand::CloseSubstream { + peers: HashSet::from_iter([peer]), + }) + .await; + } + + /// Close substream to multiple peers. + /// + /// Similar to [`NotificationHandle::close_substream()`] but multiple substreams are closed + /// using a single call to `NotificationProtocol`. + pub async fn close_substream_batch(&self, peers: impl Iterator) { + let peers = peers.filter(|peer| self.peers.contains_key(peer)).collect::>(); + + if peers.is_empty() { + return; + } + + tracing::trace!( + target: LOG_TARGET, + ?peers, + "close substreams", + ); + + let _ = self.command_tx.send(NotificationCommand::CloseSubstream { peers }).await; + } + + /// Try close substream to multiple peers. + /// + /// Similar to [`NotificationHandle::close_substream()`] but multiple substreams are closed + /// using a single call to `NotificationProtocol`. + /// + /// If the channel is clogged, `peers` is returned as `Err(HashSet)`. + /// + /// If `peers` is empty after filtering all already-connected peers, + /// `Err(HashMap::new())` is returned. + pub fn try_close_substream_batch( + &self, + peers: impl Iterator, + ) -> Result<(), HashSet> { + let peers = peers.filter(|peer| self.peers.contains_key(peer)).collect::>(); + + if peers.is_empty() { + return Err(HashSet::new()); + } + + tracing::trace!( + target: LOG_TARGET, + ?peers, + "close substreams", + ); + + self.command_tx + .try_send(NotificationCommand::CloseSubstream { + peers: peers.clone(), + }) + .map_err(|_| peers) + } + + /// Set new handshake. + pub fn set_handshake(&mut self, handshake: Vec) { + tracing::trace!(target: LOG_TARGET, ?handshake, "set handshake"); + + *self.handshake.write() = handshake; + } + + /// Send validation result to the notification protocol for an inbound substream received from + /// `peer`. + pub fn send_validation_result(&mut self, peer: PeerId, result: ValidationResult) { + tracing::trace!(target: LOG_TARGET, ?peer, ?result, "send validation result"); + + self.pending_validations.remove(&peer).map(|tx| tx.send(result)); + } + + /// Send notification to `peer` synchronously. + /// + /// If the channel is clogged, [`NotificationError::ChannelClogged`] is returned. + pub fn send_sync_notification( + &mut self, + peer: PeerId, + notification: Vec, + ) -> Result<(), NotificationError> { + match self.peers.get_mut(&peer) { + Some(sink) => match sink.send_sync_notification(notification) { + Ok(()) => Ok(()), + Err(error) => match error { + NotificationError::NoConnection => Err(NotificationError::NoConnection), + NotificationError::ChannelClogged => { + let _ = self.clogged.insert(peer).then(|| { + self.command_tx.try_send(NotificationCommand::ForceClose { peer }) + }); + + Err(NotificationError::ChannelClogged) + } + // sink doesn't emit any other `NotificationError`s + _ => unreachable!(), + }, + }, + None => Ok(()), + } + } + + /// Send notification to `peer` asynchronously, waiting for the channel to have capacity + /// if it's clogged. + /// + /// Returns [`Error::PeerDoesntExist(PeerId)`](crate::error::Error::PeerDoesntExist) if the + /// connection has been closed. + pub async fn send_async_notification( + &mut self, + peer: PeerId, + notification: Vec, + ) -> crate::Result<()> { + match self.peers.get_mut(&peer) { + Some(sink) => sink.send_async_notification(notification).await, + None => Err(Error::PeerDoesntExist(peer)), + } + } + + /// Get a copy of the underlying notification sink for the peer. + /// + /// `None` is returned if `peer` doesn't exist. + pub fn notification_sink(&self, peer: PeerId) -> Option { + self.peers.get(&peer).cloned() + } + + #[cfg(feature = "fuzz")] + /// Expose functionality for fuzzing + pub async fn fuzz_send_message(&mut self, command: NotificationCommand) -> crate::Result<()> { + if let NotificationCommand::SendNotification { peer_id, notif } = command { + self.send_async_notification(peer_id, notif).await?; + } else { + let _ = self.command_tx.send(command).await; + } + Ok(()) + } +} + +impl Stream for NotificationHandle { + type Item = NotificationEvent; + + fn poll_next(mut self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll> { + loop { + match self.event_rx.poll_recv(cx) { + Poll::Pending => {} + Poll::Ready(None) => return Poll::Ready(None), + Poll::Ready(Some(event)) => match event { + InnerNotificationEvent::NotificationStreamOpened { + protocol, + fallback, + direction, + peer, + handshake, + sink, + } => { + self.peers.insert(peer, sink); + + return Poll::Ready(Some(NotificationEvent::NotificationStreamOpened { + protocol, + fallback, + direction, + peer, + handshake, + })); + } + InnerNotificationEvent::NotificationStreamClosed { peer } => { + self.peers.remove(&peer); + self.clogged.remove(&peer); + + return Poll::Ready(Some(NotificationEvent::NotificationStreamClosed { + peer, + })); + } + InnerNotificationEvent::ValidateSubstream { + protocol, + fallback, + peer, + handshake, + tx, + } => { + self.pending_validations.insert(peer, tx); + + return Poll::Ready(Some(NotificationEvent::ValidateSubstream { + protocol, + fallback, + peer, + handshake, + })); + } + InnerNotificationEvent::NotificationStreamOpenFailure { peer, error } => + return Poll::Ready(Some( + NotificationEvent::NotificationStreamOpenFailure { peer, error }, + )), + }, + } + + match futures::ready!(self.notif_rx.poll_recv(cx)) { + None => return Poll::Ready(None), + Some((peer, notification)) => + if self.peers.contains_key(&peer) { + return Poll::Ready(Some(NotificationEvent::NotificationReceived { + peer, + notification, + })); + }, + } + } + } +} diff --git a/client/litep2p/src/protocol/notification/mod.rs b/client/litep2p/src/protocol/notification/mod.rs new file mode 100644 index 00000000..a139fd71 --- /dev/null +++ b/client/litep2p/src/protocol/notification/mod.rs @@ -0,0 +1,1847 @@ +// Copyright 2023 litep2p developers +// +// Permission is hereby granted, free of charge, to any person obtaining a +// copy of this software and associated documentation files (the "Software"), +// to deal in the Software without restriction, including without limitation +// the rights to use, copy, modify, merge, publish, distribute, sublicense, +// and/or sell copies of the Software, and to permit persons to whom the +// Software is furnished to do so, subject to the following conditions: +// +// The above copyright notice and this permission notice shall be included in +// all copies or substantial portions of the Software. +// +// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS +// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE +// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER +// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING +// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER +// DEALINGS IN THE SOFTWARE. + +//! Notification protocol implementation. + +use crate::{ + error::{Error, SubstreamError}, + executor::Executor, + protocol::{ + self, + notification::{ + connection::Connection, + handle::NotificationEventHandle, + negotiation::{HandshakeEvent, HandshakeService}, + }, + TransportEvent, TransportService, + }, + substream::Substream, + types::{protocol::ProtocolName, SubstreamId}, + PeerId, DEFAULT_CHANNEL_SIZE, +}; + +use bytes::BytesMut; +use futures::{future::BoxFuture, stream::FuturesUnordered, StreamExt}; +use multiaddr::Multiaddr; +use tokio::sync::{ + mpsc::{channel, Receiver, Sender}, + oneshot, +}; + +use std::{collections::HashMap, sync::Arc, time::Duration}; + +pub use config::{Config, ConfigBuilder}; +pub use handle::{NotificationHandle, NotificationSink}; +pub use types::{ + Direction, NotificationCommand, NotificationError, NotificationEvent, ValidationResult, +}; + +mod config; +mod connection; +mod handle; +mod negotiation; +mod types; + +#[cfg(test)] +mod tests; + +/// Logging target for the file. +const LOG_TARGET: &str = "litep2p::notification"; + +/// Connection state. +/// +/// Used to track transport level connectivity state when there is a pending validation. +/// See [`PeerState::ValidationPending`] for more details. +#[derive(Debug, PartialEq, Eq)] +enum ConnectionState { + /// There is a active, transport-level connection open to the peer. + Open, + + /// There is no transport-level connection open to the peer. + Closed, +} + +/// Inbound substream state. +#[derive(Debug)] +enum InboundState { + /// Substream is closed. + Closed, + + /// Handshake is being read from the remote node. + ReadingHandshake, + + /// Substream and its handshake are being validated by the user protocol. + Validating { + /// Inbound substream. + inbound: Substream, + }, + + /// Handshake is being sent to the remote node. + SendingHandshake, + + /// Substream is open. + Open { + /// Inbound substream. + inbound: Substream, + }, +} + +/// Outbound substream state. +#[derive(Debug)] +enum OutboundState { + /// Substream is closed. + Closed, + + /// Outbound substream initiated. + OutboundInitiated { + /// Substream ID. + substream: SubstreamId, + }, + + /// Substream is in the state of being negotiated. + /// + /// This process entails sending local node's handshake and reading back the remote node's + /// handshake if they've accepted the substream or detecting that the substream was closed + /// in case the substream was rejected. + Negotiating, + + /// Substream is open. + Open { + /// Received handshake. + handshake: Vec, + + /// Outbound substream. + outbound: Substream, + }, +} + +impl OutboundState { + /// Get pending outboud substream ID, if it exists. + fn pending_open(&self) -> Option { + match &self { + OutboundState::OutboundInitiated { substream } => Some(*substream), + _ => None, + } + } +} + +#[derive(Debug)] +enum PeerState { + /// Peer state is poisoned due to invalid state transition. + Poisoned, + + /// Validation for an inbound substream is still pending. + /// + /// In order to enforce valid state transitions, `NotificationProtocol` keeps track of pending + /// validations across connectivity events (open/closed) and enforces that no activity happens + /// for any peer that is still awaiting validation for their inbound substream. + /// + /// If connection closes while the substream is being validated, instead of removing peer from + /// `peers`, the peer state is set as `ValidationPending` which indicates to the state machine + /// that a response for a inbound substream is pending validation. The substream itself will be + /// dead by the time validation is received if the peer state is `ValidationPending` since the + /// substream was part of a previous, now-closed substream but this state allows + /// `NotificationProtocol` to enforce correct state transitions by, e.g., rejecting new inbound + /// substream while a previous substream is still being validated or rejecting outbound + /// substreams on new connections if that same condition holds. + ValidationPending { + /// What is current connectivity state of the peer. + /// + /// If `state` is `ConnectionState::Closed` when the validation is finally received, peer + /// is removed from `peer` and if the `state` is `ConnectionState::Open`, peer is moved to + /// state `PeerState::Closed` and user is allowed to retry opening an outbound substream. + state: ConnectionState, + }, + + /// Connection to peer is closed. + Closed { + /// Connection might have been closed while there was an outbound substream still pending. + /// + /// To handle this state transition correctly in case the substream opens after the + /// connection is considered closed, store the `SubstreamId` to that it can be verified in + /// case the substream ever opens. + pending_open: Option, + }, + + /// Peer is being dialed in order to open an outbound substream to them. + Dialing, + + /// Outbound substream initiated. + OutboundInitiated { + /// Substream ID. + substream: SubstreamId, + }, + + /// Substream is being validated. + Validating { + /// Protocol. + protocol: ProtocolName, + + /// Fallback protocol, if the substream was negotiated using a fallback name. + fallback: Option, + + /// Outbound protocol state. + outbound: OutboundState, + + /// Inbound protocol state. + inbound: InboundState, + + /// Direction. + direction: Direction, + }, + + /// Notification stream has been opened. + Open { + /// `Oneshot::Sender` for shutting down the connection. + shutdown: oneshot::Sender<()>, + }, +} + +/// Peer context. +#[derive(Debug)] +struct PeerContext { + /// Peer state. + state: PeerState, +} + +impl PeerContext { + /// Create new [`PeerContext`]. + fn new() -> Self { + Self { + state: PeerState::Closed { pending_open: None }, + } + } +} + +pub(crate) struct NotificationProtocol { + /// Transport service. + service: TransportService, + + /// Protocol. + protocol: ProtocolName, + + /// Auto accept inbound substream if the outbound substream was initiated by the local node. + auto_accept: bool, + + /// TX channel passed to the protocol used for sending events. + event_handle: NotificationEventHandle, + + /// TX channel for sending shut down notifications from connection handlers to + /// [`NotificationProtocol`]. + shutdown_tx: Sender, + + /// RX channel for receiving shutdown notifications from the connection handlers. + shutdown_rx: Receiver, + + /// RX channel passed to the protocol used for receiving commands. + command_rx: Receiver, + + /// TX channel given to connection handlers for sending notifications. + notif_tx: Sender<(PeerId, BytesMut)>, + + /// Connected peers. + peers: HashMap, + + /// Pending outbound substreams. + pending_outbound: HashMap, + + /// Handshaking service which reads and writes the handshakes to inbound + /// and outbound substreams asynchronously. + negotiation: HandshakeService, + + /// Synchronous channel size. + sync_channel_size: usize, + + /// Asynchronous channel size. + async_channel_size: usize, + + /// Executor for connection handlers. + executor: Arc, + + /// Pending substream validations. + pending_validations: FuturesUnordered>, + + /// Timers for pending outbound substreams. + timers: FuturesUnordered>, + + /// Should `NotificationProtocol` attempt to dial the peer. + should_dial: bool, +} + +impl NotificationProtocol { + pub(crate) fn new( + service: TransportService, + config: Config, + executor: Arc, + ) -> Self { + let (shutdown_tx, shutdown_rx) = channel(DEFAULT_CHANNEL_SIZE); + + Self { + service, + shutdown_tx, + shutdown_rx, + executor, + peers: HashMap::new(), + protocol: config.protocol_name, + auto_accept: config.auto_accept, + pending_validations: FuturesUnordered::new(), + timers: FuturesUnordered::new(), + event_handle: NotificationEventHandle::new(config.event_tx), + notif_tx: config.notif_tx, + command_rx: config.command_rx, + pending_outbound: HashMap::new(), + negotiation: HandshakeService::new(config.handshake), + sync_channel_size: config.sync_channel_size, + async_channel_size: config.async_channel_size, + should_dial: config.should_dial, + } + } + + /// Connection established to remote node. + /// + /// If the peer already exists, the only valid state for it is `Dialing` as it indicates that + /// the user tried to open a substream to a peer who was not connected to local node. + /// + /// Any other state indicates that there's an error in the state transition logic. + async fn on_connection_established(&mut self, peer: PeerId) -> crate::Result<()> { + tracing::trace!(target: LOG_TARGET, ?peer, protocol = %self.protocol, "connection established"); + + let Some(context) = self.peers.get_mut(&peer) else { + self.peers.insert(peer, PeerContext::new()); + return Ok(()); + }; + + match std::mem::replace(&mut context.state, PeerState::Poisoned) { + PeerState::Dialing => { + tracing::trace!( + target: LOG_TARGET, + ?peer, + protocol = %self.protocol, + "dial succeeded, open substream to peer", + ); + + context.state = PeerState::Closed { pending_open: None }; + self.on_open_substream(peer).await + } + // connection established but validation is still pending + // + // update the connection state so that `NotificationProtocol` can proceed + // to correct state after the validation result has beern received + PeerState::ValidationPending { state } => { + debug_assert_eq!(state, ConnectionState::Closed); + + tracing::debug!( + target: LOG_TARGET, + ?peer, + protocol = %self.protocol, + "new connection established while validation still pending", + ); + + context.state = PeerState::ValidationPending { + state: ConnectionState::Open, + }; + + Ok(()) + } + state => { + tracing::error!( + target: LOG_TARGET, + ?peer, + protocol = %self.protocol, + ?state, + "state mismatch: peer already exists", + ); + debug_assert!(false); + Err(Error::PeerAlreadyExists(peer)) + } + } + } + + /// Connection closed to remote node. + /// + /// If the connection was considered open (both substreams were open), user is notified that + /// the notification stream was closed. + /// + /// If the connection was still in progress (either substream was not fully open), the user is + /// reported about it only if they had opened an outbound substream (outbound is either fully + /// open, it had been initiated or the substream was under negotiation). + async fn on_connection_closed(&mut self, peer: PeerId) -> crate::Result<()> { + tracing::trace!(target: LOG_TARGET, ?peer, protocol = %self.protocol, "connection closed"); + + self.pending_outbound.retain(|_, p| p != &peer); + + let Some(context) = self.peers.remove(&peer) else { + tracing::error!( + target: LOG_TARGET, + ?peer, + protocol = %self.protocol, + "state mismatch: peer doesn't exist", + ); + debug_assert!(false); + return Err(Error::PeerDoesntExist(peer)); + }; + + // clean up all pending state for the peer + self.negotiation.remove_outbound(&peer); + self.negotiation.remove_inbound(&peer); + + match context.state { + // outbound initiated, report open failure to peer + PeerState::OutboundInitiated { .. } => { + self.event_handle + .report_notification_stream_open_failure(peer, NotificationError::Rejected) + .await; + } + // substream fully open, report that the notification stream is closed + PeerState::Open { shutdown } => { + let _ = shutdown.send(()); + } + // if the substream was being validated, user must be notified that the substream is + // now considered rejected if they had been made aware of the existence of the pending + // connection + PeerState::Validating { + outbound, inbound, .. + } => { + match (outbound, inbound) { + // substream was being validated by the protocol when the connection was closed + (OutboundState::Closed, InboundState::Validating { .. }) => { + tracing::debug!( + target: LOG_TARGET, + ?peer, + protocol = %self.protocol, + "connection closed while validation pending", + ); + + self.peers.insert( + peer, + PeerContext { + state: PeerState::ValidationPending { + state: ConnectionState::Closed, + }, + }, + ); + } + // user either initiated an outbound substream or an outbound substream was + // opened/being opened as a result of an accepted inbound substream but was not + // yet fully open + // + // to have consistent state tracking in the user protocol, substream rejection + // must be reported to the user + ( + OutboundState::OutboundInitiated { .. } + | OutboundState::Negotiating + | OutboundState::Open { .. }, + _, + ) => { + tracing::debug!( + target: LOG_TARGET, + ?peer, + protocol = %self.protocol, + "connection closed outbound substream under negotiation", + ); + + self.event_handle + .report_notification_stream_open_failure( + peer, + NotificationError::Rejected, + ) + .await; + } + (_, _) => {} + } + } + // pending validations must be tracked across connection open/close events + PeerState::ValidationPending { .. } => { + tracing::debug!( + target: LOG_TARGET, + ?peer, + protocol = %self.protocol, + "validation pending while connection closed", + ); + + self.peers.insert( + peer, + PeerContext { + state: PeerState::ValidationPending { + state: ConnectionState::Closed, + }, + }, + ); + } + _ => {} + } + + Ok(()) + } + + /// Local node opened a substream to remote node. + /// + /// The connection can be in three different states: + /// - this is the first substream that was opened and thus the connection was initiated by the + /// local node + /// - this is a response to a previously received inbound substream which the local node + /// accepted and as a result, opened its own substream + /// - local and remote nodes opened substreams at the same time + /// + /// In the first case, the local node's handshake is sent to remote node and the substream is + /// polled in the background until they either send their handshake or close the substream. + /// + /// For the second case, the connection was initiated by the remote node and the substream was + /// accepted by the local node which initiated an outbound substream to the remote node. + /// The only valid states for this case are [`InboundState::Open`], + /// and [`InboundState::SendingHandshake`] as they imply + /// that the inbound substream have been accepted by the local node and this opened outbound + /// substream is a result of a valid state transition. + /// + /// For the third case, if the nodes have opened substreams at the same time, the outbound state + /// must be [`OutboundState::OutboundInitiated`] to ascertain that the an outbound substream was + /// actually opened. Any other state would be a state mismatch and would mean that the + /// connection is opening substreams without the permission of the protocol handler. + async fn on_outbound_substream( + &mut self, + protocol: ProtocolName, + fallback: Option, + peer: PeerId, + substream_id: SubstreamId, + outbound: Substream, + ) -> crate::Result<()> { + tracing::debug!( + target: LOG_TARGET, + ?peer, + ?protocol, + ?substream_id, + "handle outbound substream", + ); + + // peer must exist since an outbound substream was received from them + let Some(context) = self.peers.get_mut(&peer) else { + tracing::error!(target: LOG_TARGET, ?peer, "peer doesn't exist for outbound substream"); + debug_assert!(false); + return Err(Error::PeerDoesntExist(peer)); + }; + + let pending_peer = self.pending_outbound.remove(&substream_id); + + match std::mem::replace(&mut context.state, PeerState::Poisoned) { + // the connection was initiated by the local node, send handshake to remote and wait to + // receive their handshake back + PeerState::OutboundInitiated { substream } => { + debug_assert!(substream == substream_id); + debug_assert!(pending_peer == Some(peer)); + + tracing::trace!( + target: LOG_TARGET, + ?peer, + protocol = %self.protocol, + ?fallback, + ?substream_id, + "negotiate outbound protocol", + ); + + self.negotiation.negotiate_outbound(peer, outbound); + context.state = PeerState::Validating { + protocol, + fallback, + inbound: InboundState::Closed, + outbound: OutboundState::Negotiating, + direction: Direction::Outbound, + }; + } + PeerState::Validating { + protocol, + fallback, + inbound, + direction, + outbound: outbound_state, + } => { + // the inbound substream has been accepted by the local node since the handshake has + // been read and the local handshake has either already been sent or + // it's in the process of being sent. + match inbound { + InboundState::SendingHandshake | InboundState::Open { .. } => { + context.state = PeerState::Validating { + protocol, + fallback, + inbound, + direction, + outbound: OutboundState::Negotiating, + }; + self.negotiation.negotiate_outbound(peer, outbound); + } + // nodes have opened substreams at the same time + inbound_state => match outbound_state { + OutboundState::OutboundInitiated { substream } => { + debug_assert!(substream == substream_id); + + context.state = PeerState::Validating { + protocol, + fallback, + direction, + inbound: inbound_state, + outbound: OutboundState::Negotiating, + }; + self.negotiation.negotiate_outbound(peer, outbound); + } + // invalid state: more than one outbound substream has been opened + inner_state => { + tracing::error!( + target: LOG_TARGET, + ?peer, + %protocol, + ?substream_id, + ?inbound_state, + ?inner_state, + "invalid state, expected `OutboundInitiated`", + ); + + let _ = outbound.close().await; + debug_assert!(false); + } + }, + } + } + // the connection may have been closed while an outbound substream was pending + // if the outbound substream was initiated successfully, close it and reset + // `pending_open` + PeerState::Closed { pending_open } if pending_open == Some(substream_id) => { + let _ = outbound.close().await; + + context.state = PeerState::Closed { pending_open: None }; + } + state => { + tracing::error!( + target: LOG_TARGET, + ?peer, + %protocol, + ?substream_id, + ?state, + "invalid state: more than one outbound substream opened", + ); + + let _ = outbound.close().await; + debug_assert!(false); + } + } + + Ok(()) + } + + /// Remote opened a substream to local node. + /// + /// The peer can be in four different states for the inbound substream to be considered valid: + /// - the connection is closed + /// - conneection is open but substream validation from a previous connection is still pending + /// - outbound substream has been opened but not yet acknowledged by the remote peer + /// - outbound substream has been opened and acknowledged by the remote peer and it's being + /// negotiated + /// + /// If remote opened more than one substream, the new substream is simply discarded. + async fn on_inbound_substream( + &mut self, + protocol: ProtocolName, + fallback: Option, + peer: PeerId, + substream: Substream, + ) -> crate::Result<()> { + // peer must exist since an inbound substream was received from them + let Some(context) = self.peers.get_mut(&peer) else { + tracing::error!(target: LOG_TARGET, ?peer, "peer doesn't exist for inbound substream"); + debug_assert!(false); + return Err(Error::PeerDoesntExist(peer)); + }; + + tracing::debug!( + target: LOG_TARGET, + ?peer, + %protocol, + ?fallback, + state = ?context.state, + "handle inbound substream", + ); + + match std::mem::replace(&mut context.state, PeerState::Poisoned) { + // inbound substream of a previous connection is still pending validation, + // reject any new inbound substreams until an answer is heard from the user + state @ PeerState::ValidationPending { .. } => { + tracing::debug!( + target: LOG_TARGET, + ?peer, + %protocol, + ?fallback, + ?state, + "validation for previous substream still pending", + ); + + let _ = substream.close().await; + context.state = state; + } + // outbound substream for previous connection still pending, reject inbound substream + // and wait for the outbound substream state to conclude as either succeeded or failed + // before accepting any inbound substreams. + PeerState::Closed { + pending_open: Some(substream_id), + } => { + tracing::debug!( + target: LOG_TARGET, + ?peer, + protocol = %self.protocol, + "received inbound substream while outbound substream opening, rejecting", + ); + let _ = substream.close().await; + + context.state = PeerState::Closed { + pending_open: Some(substream_id), + }; + } + // the peer state is closed so this is a fresh inbound substream. + PeerState::Closed { pending_open: None } => { + self.negotiation.read_handshake(peer, substream); + + context.state = PeerState::Validating { + protocol, + fallback, + direction: Direction::Inbound, + inbound: InboundState::ReadingHandshake, + outbound: OutboundState::Closed, + }; + } + // if the connection is under validation (so an outbound substream has been opened and + // it's still pending or under negotiation), the only valid state for the + // inbound state is closed as it indicates that there isn't an inbound substream yet for + // the remote node duplicate substreams are prohibited. + PeerState::Validating { + protocol, + fallback, + outbound, + direction, + inbound: InboundState::Closed, + } => { + self.negotiation.read_handshake(peer, substream); + + context.state = PeerState::Validating { + protocol, + fallback, + outbound, + direction, + inbound: InboundState::ReadingHandshake, + }; + } + // outbound substream may have been initiated by the local node while a remote node also + // opened a substream roughly at the same time + PeerState::OutboundInitiated { + substream: outbound, + } => { + self.negotiation.read_handshake(peer, substream); + + context.state = PeerState::Validating { + protocol, + fallback, + direction: Direction::Outbound, + outbound: OutboundState::OutboundInitiated { + substream: outbound, + }, + inbound: InboundState::ReadingHandshake, + }; + } + // new inbound substream opend while validation for the previous substream was still + // pending + // + // the old substream can be considered dead because remote wouldn't open a new substream + // to us unless they had discarded the previous substream. + // + // set peer state to `ValidationPending` to indicate that the peer is "blocked" until a + // validation for the substream is heard, blocking any further activity for + // the connection and once the validation is received and in case the + // substream is accepted, it will be reported as open failure to to the peer + // because the states have gone out of sync. + PeerState::Validating { + outbound: OutboundState::Closed, + inbound: + InboundState::Validating { + inbound: pending_substream, + }, + .. + } => { + tracing::debug!( + target: LOG_TARGET, + ?peer, + protocol = %self.protocol, + "remote opened substream while previous was still pending, connection failed", + ); + let _ = substream.close().await; + let _ = pending_substream.close().await; + + context.state = PeerState::ValidationPending { + state: ConnectionState::Open, + }; + } + // remote opened another inbound substream, close it and otherwise ignore the event + // as this is a non-serious protocol violation. + state => { + tracing::debug!( + target: LOG_TARGET, + ?peer, + %protocol, + ?fallback, + ?state, + "remote opened more than one inbound substreams, discarding", + ); + + let _ = substream.close().await; + context.state = state; + } + } + + Ok(()) + } + + /// Failed to open substream to remote node. + /// + /// If the substream was initiated by the local node, it must be reported that the substream + /// failed to open. Otherwise the peer state can silently be converted to `Closed`. + async fn on_substream_open_failure( + &mut self, + substream_id: SubstreamId, + error: SubstreamError, + ) { + tracing::debug!( + target: LOG_TARGET, + protocol = %self.protocol, + ?substream_id, + ?error, + "failed to open substream" + ); + + let Some(peer) = self.pending_outbound.remove(&substream_id) else { + tracing::warn!( + target: LOG_TARGET, + protocol = %self.protocol, + ?substream_id, + "pending outbound substream doesn't exist", + ); + debug_assert!(false); + return; + }; + + // peer must exist since an outbound substream failure was received from them + let Some(context) = self.peers.get_mut(&peer) else { + tracing::warn!(target: LOG_TARGET, ?peer, "peer doesn't exist"); + debug_assert!(false); + return; + }; + + match &mut context.state { + PeerState::OutboundInitiated { .. } => { + context.state = PeerState::Closed { pending_open: None }; + + self.event_handle + .report_notification_stream_open_failure(peer, NotificationError::Rejected) + .await; + } + // if the substream was accepted by the local node and as a result, an outbound + // substream was accepted as a result this should not be reported to local node + PeerState::Validating { outbound, .. } => { + self.negotiation.remove_inbound(&peer); + self.negotiation.remove_outbound(&peer); + + let pending_open = match outbound { + OutboundState::Closed => None, + OutboundState::OutboundInitiated { substream } => { + self.event_handle + .report_notification_stream_open_failure( + peer, + NotificationError::Rejected, + ) + .await; + + Some(*substream) + } + OutboundState::Negotiating | OutboundState::Open { .. } => { + self.event_handle + .report_notification_stream_open_failure( + peer, + NotificationError::Rejected, + ) + .await; + + None + } + }; + + context.state = PeerState::Closed { pending_open }; + } + PeerState::Closed { pending_open } => { + tracing::debug!( + target: LOG_TARGET, + protocol = %self.protocol, + ?substream_id, + "substream open failure for a closed connection", + ); + debug_assert_eq!(pending_open, &Some(substream_id)); + context.state = PeerState::Closed { pending_open: None }; + } + state => { + tracing::warn!( + target: LOG_TARGET, + protocol = %self.protocol, + ?substream_id, + ?state, + "invalid state for outbound substream open failure", + ); + context.state = PeerState::Closed { pending_open: None }; + debug_assert!(false); + } + } + } + + /// Open substream to remote `peer`. + /// + /// Outbound substream can opened only if the `PeerState` is `Closed`. + /// By forcing the substream to be opened only if the state is currently closed, + /// `NotificationProtocol` can enfore more predictable state transitions. + /// + /// Other states either imply an invalid state transition ([`PeerState::Open`]) or that an + /// inbound substream has already been received and its currently being validated by the user. + async fn on_open_substream(&mut self, peer: PeerId) -> crate::Result<()> { + tracing::trace!(target: LOG_TARGET, ?peer, protocol = %self.protocol, "open substream"); + + let Some(context) = self.peers.get_mut(&peer) else { + if !self.should_dial { + tracing::debug!( + target: LOG_TARGET, + ?peer, + protocol = %self.protocol, + "connection to peer not open and dialing disabled", + ); + + self.event_handle + .report_notification_stream_open_failure(peer, NotificationError::DialFailure) + .await; + return Ok(()); + } + + match self.service.dial(&peer) { + Err(error) => { + tracing::debug!( + target: LOG_TARGET, + ?peer, + protocol = %self.protocol, + ?error, + "failed to dial peer", + ); + + self.event_handle + .report_notification_stream_open_failure( + peer, + NotificationError::DialFailure, + ) + .await; + + return Err(error.into()); + } + Ok(()) => { + tracing::trace!( + target: LOG_TARGET, + ?peer, + protocol = %self.protocol, + "started to dial peer", + ); + + self.peers.insert( + peer, + PeerContext { + state: PeerState::Dialing, + }, + ); + return Ok(()); + } + } + }; + + match context.state { + // protocol can only request a new outbound substream to be opened if the state is + // `Closed` other states imply that it's already open + PeerState::Closed { + pending_open: Some(substream_id), + } => { + tracing::trace!( + target: LOG_TARGET, + ?peer, + protocol = %self.protocol, + ?substream_id, + "outbound substream opening, reusing pending open substream", + ); + + self.pending_outbound.insert(substream_id, peer); + context.state = PeerState::OutboundInitiated { + substream: substream_id, + }; + } + PeerState::Closed { .. } => match self.service.open_substream(peer) { + Ok(substream_id) => { + tracing::trace!( + target: LOG_TARGET, + ?peer, + protocol = %self.protocol, + ?substream_id, + "outbound substream opening", + ); + + self.pending_outbound.insert(substream_id, peer); + context.state = PeerState::OutboundInitiated { + substream: substream_id, + }; + } + Err(error) => { + tracing::debug!( + target: LOG_TARGET, + ?peer, + protocol = %self.protocol, + ?error, + "failed to open substream", + ); + + self.event_handle + .report_notification_stream_open_failure( + peer, + NotificationError::NoConnection, + ) + .await; + context.state = PeerState::Closed { pending_open: None }; + } + }, + // while a validation is pending for an inbound substream, user is not allowed to open + // any outbound substreams until the old inbond substream is either accepted or rejected + PeerState::ValidationPending { .. } => { + tracing::trace!( + target: LOG_TARGET, + ?peer, + protocol = %self.protocol, + "validation still pending, rejecting outbound substream request", + ); + + self.event_handle + .report_notification_stream_open_failure( + peer, + NotificationError::ValidationPending, + ) + .await; + } + _ => {} + } + + Ok(()) + } + + /// Close substream to remote `peer`. + /// + /// This function can only be called if the substream was actually open, any other state is + /// unreachable as the user is unable to emit this command to [`NotificationProtocol`] unless + /// the connection has been fully opened. + async fn on_close_substream(&mut self, peer: PeerId) { + tracing::debug!(target: LOG_TARGET, ?peer, protocol = %self.protocol, "close substream"); + + let Some(context) = self.peers.get_mut(&peer) else { + tracing::debug!(target: LOG_TARGET, ?peer, "peer doesn't exist"); + return; + }; + + match std::mem::replace(&mut context.state, PeerState::Poisoned) { + PeerState::Open { shutdown } => { + let _ = shutdown.send(()); + + context.state = PeerState::Closed { pending_open: None }; + } + state => { + tracing::debug!( + target: LOG_TARGET, + ?peer, + protocol = %self.protocol, + ?state, + "substream already closed", + ); + context.state = state; + } + } + } + + /// Handle validation result. + /// + /// The validation result binary (accept/reject). If the node is rejected, the substreams are + /// discarded and state is set to `PeerState::Closed`. If there was an outbound substream in + /// progress while the connection was rejected by the user, the oubound state is discarded, + /// except for the substream ID of the substream which is kept for later use, in case the + /// substream happens to open. + /// + /// If the node is accepted and there is no outbound substream to them open yet, a new substream + /// is opened and once it opens, the local handshake will be sent to the remote peer and if + /// they also accept the substream the connection is considered fully open. + async fn on_validation_result( + &mut self, + peer: PeerId, + result: ValidationResult, + ) -> crate::Result<()> { + tracing::trace!( + target: LOG_TARGET, + ?peer, + protocol = %self.protocol, + ?result, + "handle validation result", + ); + + let Some(context) = self.peers.get_mut(&peer) else { + tracing::debug!(target: LOG_TARGET, ?peer, "peer doesn't exist"); + return Err(Error::PeerDoesntExist(peer)); + }; + + match std::mem::replace(&mut context.state, PeerState::Poisoned) { + PeerState::Validating { + protocol, + fallback, + outbound, + direction, + inbound: InboundState::Validating { inbound }, + } => match result { + // substream was rejected by the local node, if an outbound substream was under + // negotation, discard that data and if an outbound substream was + // initiated, save the `SubstreamId` of that substream and later if the substream + // is opened, the state can be corrected to `pending_open: None`. + ValidationResult::Reject => { + let _ = inbound.close().await; + self.negotiation.remove_outbound(&peer); + self.negotiation.remove_inbound(&peer); + context.state = PeerState::Closed { + pending_open: outbound.pending_open(), + }; + + Ok(()) + } + ValidationResult::Accept => match outbound { + // no outbound substream exists so initiate a new substream open and send the + // local handshake to remote node, indicating that the + // connection was accepted by the local node + OutboundState::Closed => match self.service.open_substream(peer) { + Ok(substream) => { + self.negotiation.send_handshake(peer, inbound); + self.pending_outbound.insert(substream, peer); + + context.state = PeerState::Validating { + protocol, + fallback, + direction, + inbound: InboundState::SendingHandshake, + outbound: OutboundState::OutboundInitiated { substream }, + }; + Ok(()) + } + // failed to open outbound substream after accepting an inbound substream + // + // since the user was notified of this substream and they accepted it, + // they expecting some kind of answer (open success/failure). + // + // report to user that the substream failed to open so they can track the + // state transitions of the peer correctly + Err(error) => { + tracing::trace!( + target: LOG_TARGET, + ?peer, + protocol = %self.protocol, + ?result, + ?error, + "failed to open outbound substream for accepted substream", + ); + + let _ = inbound.close().await; + context.state = PeerState::Closed { pending_open: None }; + + self.event_handle + .report_notification_stream_open_failure( + peer, + NotificationError::Rejected, + ) + .await; + + Err(error.into()) + } + }, + // here the state is one of `OutboundState::{OutboundInitiated, Negotiating, + // Open}` so that state can be safely ignored and all that + // has to be done is to send the local handshake to remote + // node to indicate that the connection was accepted. + _ => { + self.negotiation.send_handshake(peer, inbound); + + context.state = PeerState::Validating { + protocol, + fallback, + direction, + inbound: InboundState::SendingHandshake, + outbound, + }; + Ok(()) + } + }, + }, + // validation result received for an inbound substream which is now considered dead + // because while the substream was being validated, the connection had closed. + // + // if the substream was rejected and there is no active connection to the peer, + // just remove the peer from `peers` without informing user + // + // if the substream was accepted, the user must be informed that the substream failed to + // open. Depending on whether there is currently a connection open to the peer, either + // report `Rejected`/`NoConnection` and let the user try again. + PeerState::ValidationPending { state } => { + if let Some(error) = match state { + ConnectionState::Open => { + context.state = PeerState::Closed { pending_open: None }; + + std::matches!(result, ValidationResult::Accept) + .then_some(NotificationError::Rejected) + } + ConnectionState::Closed => { + self.peers.remove(&peer); + + std::matches!(result, ValidationResult::Accept) + .then_some(NotificationError::NoConnection) + } + } { + self.event_handle.report_notification_stream_open_failure(peer, error).await; + } + + Ok(()) + } + // if the user incorrectly send a validation result for a peer that doesn't require + // validation, set state back to what it was and ignore the event + // + // the user protocol may send a stale validation result not because of a programming + // error but because it has a backlock of unhandled events, with one event potentially + // nullifying the need for substream validation, and is just temporarily out of sync + // with `NotificationProtocol` + state => { + tracing::debug!( + target: LOG_TARGET, + ?peer, + protocol = %self.protocol, + ?state, + "validation result received for peer that doesn't require validation", + ); + + context.state = state; + Ok(()) + } + } + } + + /// Handle handshake event. + /// + /// There are three different handshake event types: + /// - outbound substream negotiated + /// - inbound substream negotiated + /// - substream negotiation error + /// + /// Neither outbound nor inbound substream negotiated automatically means that the connection is + /// considered open as both substreams must be fully negotiated for that to be the case. That is + /// why the peer state for inbound and outbound are set separately and at the end of the + /// function is the collective state of the substreams checked and if both substreams are + /// negotiated, the user informed that the connection is open. + /// + /// If the negotiation fails, the user may have to be informed of that. Outbound substream + /// failure always results in user getting notified since the existence of an outbound substream + /// means that the user has either initiated an outbound substreams or has accepted an inbound + /// substreams, resulting in an outbound substreams. + /// + /// Negotiation failure for inbound substreams which are in the state + /// [`InboundState::ReadingHandshake`] don't result in any notification because while the + /// handshake is being read from the substream, the user is oblivious to the fact that an + /// inbound substream has even been received. + async fn on_handshake_event(&mut self, peer: PeerId, event: HandshakeEvent) { + let Some(context) = self.peers.get_mut(&peer) else { + tracing::error!(target: LOG_TARGET, "invalid state: negotiation event received but peer doesn't exist"); + debug_assert!(false); + return; + }; + + tracing::trace!( + target: LOG_TARGET, + ?peer, + protocol = %self.protocol, + ?event, + "handle handshake event", + ); + + match event { + // either an inbound or outbound substream has been negotiated successfully + HandshakeEvent::Negotiated { + peer, + handshake, + substream, + direction, + } => match direction { + // outbound substream was negotiated, the only valid state for peer is `Validating` + // and only valid state for `OutboundState` is `Negotiating` + negotiation::Direction::Outbound => { + self.negotiation.remove_outbound(&peer); + + match std::mem::replace(&mut context.state, PeerState::Poisoned) { + PeerState::Validating { + protocol, + fallback, + direction, + outbound: OutboundState::Negotiating, + inbound, + } => { + context.state = PeerState::Validating { + protocol, + fallback, + direction, + outbound: OutboundState::Open { + handshake, + outbound: substream, + }, + inbound, + }; + } + state => { + tracing::warn!( + target: LOG_TARGET, + ?peer, + ?state, + "outbound substream negotiated but peer has invalid state", + ); + debug_assert!(false); + } + } + } + // inbound negotiation event completed + // + // the negotiation event can be on of two different types: + // - remote handshake was read from the substream + // - local handshake has been sent to remote node + // + // For the first case, the substream has to be validated by the local node. + // This means reporting the protocol name, potential negotiated fallback and the + // handshake. Local node will then either accept or reject the substream which is + // handled by [`NotificationProtocol::on_validation_result()`]. Compared to + // Substrate, litep2p requires both peers to validate the inbound handshake to allow + // more complex connection validation. If this is not necessary and the protocol + // wishes to auto-accept the inbound substreams that are a result of + // an outbound substream already accepted by the remote node, the + // substream validation is skipped and the local handshake is sent + // right away. + // + // For the second case, the local handshake was sent to remote node successfully and + // the inbound substream is considered open and if the outbound + // substream is open as well, the connection is fully open. + // + // Only valid states for [`InboundState`] are [`InboundState::ReadingHandshake`] and + // [`InboundState::SendingHandshake`] because otherwise the inbound + // substream cannot be in [`HandshakeService`](super::negotiation::HandshakeService) + // unless there is a logic bug in the state machine. + negotiation::Direction::Inbound => { + self.negotiation.remove_inbound(&peer); + + match std::mem::replace(&mut context.state, PeerState::Poisoned) { + PeerState::Validating { + protocol, + fallback, + direction, + outbound, + inbound: InboundState::ReadingHandshake, + } => { + if !std::matches!(outbound, OutboundState::Closed) && self.auto_accept { + tracing::trace!( + target: LOG_TARGET, + ?peer, + %protocol, + ?fallback, + ?direction, + ?outbound, + "auto-accept inbound substream", + ); + + self.negotiation.send_handshake(peer, substream); + context.state = PeerState::Validating { + protocol, + fallback, + direction, + inbound: InboundState::SendingHandshake, + outbound, + }; + + return; + } + + tracing::trace!( + target: LOG_TARGET, + ?peer, + %protocol, + ?fallback, + ?outbound, + "send inbound protocol for validation", + ); + + context.state = PeerState::Validating { + protocol: protocol.clone(), + fallback: fallback.clone(), + inbound: InboundState::Validating { inbound: substream }, + outbound, + direction, + }; + + let (tx, rx) = oneshot::channel(); + self.pending_validations.push(Box::pin(async move { + match rx.await { + Ok(ValidationResult::Accept) => + (peer, ValidationResult::Accept), + _ => (peer, ValidationResult::Reject), + } + })); + + self.event_handle + .report_inbound_substream(protocol, fallback, peer, handshake, tx) + .await; + } + PeerState::Validating { + protocol, + fallback, + direction, + inbound: InboundState::SendingHandshake, + outbound, + } => { + tracing::trace!( + target: LOG_TARGET, + ?peer, + %protocol, + ?fallback, + "inbound substream negotiated, waiting for outbound substream to complete", + ); + + context.state = PeerState::Validating { + protocol: protocol.clone(), + fallback: fallback.clone(), + inbound: InboundState::Open { inbound: substream }, + outbound, + direction, + }; + } + _state => debug_assert!(false), + } + } + }, + // error occurred during negotiation, eitehr for inbound or outbound substream + // user is notified of the error only if they've either initiated an outbound substream + // or if they accepted an inbound substream and as a result initiated an outbound + // substream. + HandshakeEvent::NegotiationError { peer, direction } => { + tracing::debug!( + target: LOG_TARGET, + ?peer, + protocol = %self.protocol, + ?direction, + state = ?context.state, + "failed to negotiate substream", + ); + let _ = self.negotiation.remove_outbound(&peer); + let _ = self.negotiation.remove_inbound(&peer); + + // if an outbound substream had been initiated (whatever its state is), it means + // that the user knows about the connection and must be notified that it failed to + // negotiate. + match std::mem::replace(&mut context.state, PeerState::Poisoned) { + PeerState::Validating { outbound, .. } => { + context.state = PeerState::Closed { + pending_open: outbound.pending_open(), + }; + + // notify user if the outbound substream is not considered closed + if !std::matches!(outbound, OutboundState::Closed) { + return self + .event_handle + .report_notification_stream_open_failure( + peer, + NotificationError::Rejected, + ) + .await; + } + } + _state => debug_assert!(false), + } + } + } + + // if both inbound and outbound substreams are considered open, notify the user that + // a notification stream has been opened and set up for sending and receiving + // notifications to and from remote node + match std::mem::replace(&mut context.state, PeerState::Poisoned) { + PeerState::Validating { + protocol, + fallback, + direction, + outbound: + OutboundState::Open { + handshake, + outbound, + }, + inbound: InboundState::Open { inbound }, + } => { + tracing::debug!( + target: LOG_TARGET, + ?peer, + %protocol, + ?fallback, + "notification stream opened", + ); + + let (async_tx, async_rx) = channel(self.async_channel_size); + let (sync_tx, sync_rx) = channel(self.sync_channel_size); + let sink = NotificationSink::new(peer, sync_tx, async_tx); + + // start connection handler for the peer which only deals with sending/receiving + // notifications + // + // the connection handler must be started only after the newly opened notification + // substream is reported to user because the connection handler + // might exit immediately after being started if remote closed the connection. + // + // if the order of events (open & close) is not ensured to be correct, the code + // handling the connectivity logic on the `NotificationHandle` side + // might get confused about the current state of the connection. + let shutdown_tx = self.shutdown_tx.clone(); + let (connection, shutdown) = Connection::new( + peer, + inbound, + outbound, + self.event_handle.clone(), + shutdown_tx.clone(), + self.notif_tx.clone(), + async_rx, + sync_rx, + ); + + context.state = PeerState::Open { shutdown }; + self.event_handle + .report_notification_stream_opened( + protocol, fallback, direction, peer, handshake, sink, + ) + .await; + + self.executor.run(Box::pin(async move { + connection.start().await; + })); + } + state => { + tracing::trace!( + target: LOG_TARGET, + ?peer, + protocol = %self.protocol, + ?state, + "validation for substream still pending", + ); + self.timers.push(Box::pin(async move { + futures_timer::Delay::new(Duration::from_secs(5)).await; + peer + })); + + context.state = state; + } + } + } + + /// Handle dial failure. + async fn on_dial_failure(&mut self, peer: PeerId, addresses: Vec) { + tracing::trace!( + target: LOG_TARGET, + ?peer, + protocol = %self.protocol, + ?addresses, + "handle dial failure", + ); + + let Some(context) = self.peers.remove(&peer) else { + tracing::trace!( + target: LOG_TARGET, + ?peer, + protocol = %self.protocol, + ?addresses, + "dial failure for an unknown peer", + ); + return; + }; + + match context.state { + PeerState::Dialing => { + tracing::debug!(target: LOG_TARGET, ?peer, protocol = %self.protocol, ?addresses, "failed to dial peer"); + self.event_handle + .report_notification_stream_open_failure(peer, NotificationError::DialFailure) + .await; + } + state => { + tracing::trace!( + target: LOG_TARGET, + ?peer, + protocol = %self.protocol, + ?state, + "dial failure for peer that's not being dialed", + ); + self.peers.insert(peer, PeerContext { state }); + } + } + } + + /// Handle next notification event. + /// + /// Returns `true` when the user command stream was dropped. + async fn next_event(&mut self) -> bool { + // biased select is used because the substream events must be prioritized above other events + // that is because a closed substream is detected by either `substreams` or `negotiation` + // and if that event is not handled with priority but, e.g., inbound substream is + // handled before, it can create a situation where the state machine gets confused + // about the peer's state. + tokio::select! { + biased; + + event = self.negotiation.next(), if !self.negotiation.is_empty() => { + if let Some((peer, event)) = event { + self.on_handshake_event(peer, event).await; + } else { + tracing::error!(target: LOG_TARGET, "`HandshakeService` expected to return `Some(..)`"); + debug_assert!(false); + }; + } + event = self.shutdown_rx.recv() => match event { + None => (), + Some(peer) => { + if let Some(context) = self.peers.get_mut(&peer) { + tracing::trace!( + target: LOG_TARGET, + ?peer, + protocol = %self.protocol, + "notification stream to peer closed", + ); + context.state = PeerState::Closed { pending_open: None }; + } + } + }, + // TODO: https://github.com/paritytech/litep2p/issues/338 this could be combined with `Negotiation` + peer = self.timers.next(), if !self.timers.is_empty() => match peer { + Some(peer) => { + match self.peers.get_mut(&peer) { + Some(context) => match std::mem::replace(&mut context.state, PeerState::Poisoned) { + PeerState::Validating { + outbound: OutboundState::Open { outbound, .. }, + inbound: InboundState::Closed, + .. + } => { + tracing::debug!( + target: LOG_TARGET, + ?peer, + protocol = %self.protocol, + "peer didn't answer in 10 seconds, canceling substream and closing connection", + ); + context.state = PeerState::Closed { pending_open: None }; + + let _ = outbound.close().await; + self.event_handle + .report_notification_stream_open_failure(peer, NotificationError::Rejected) + .await; + + // NOTE: this is used to work around an issue in Substrate where the protocol + // is not notified if an inbound substream is closed. That indicates that remote + // wishes the close the connection but `Notifications` still keeps the substream state + // as `Open` until the outbound substream is closed (even though the outbound substream + // is also closed at that point). This causes a further issue: inbound substreams + // are automatically opened when state is `Open`, even if the inbound substream belongs + // to a new "connection" (pair of substreams). + // + // basically what happens (from Substrate's PoV) is there are pair of substreams (`inbound1`, `outbound1`), + // litep2p closes both substreams so both `inbound1` and outbound1 become non-readable/writable. + // Substrate doesn't detect this an instead only marks `inbound1` is closed while still keeping + // the (now-closed) `outbound1` active and it will be detected closed only when Substrate tries to + // write something into that substream. If now litep2p tries to open a new connection to Substrate, + // the outbound substream from litep2p's PoV will be automatically accepted (https://github.com/paritytech/polkadot-sdk/blob/59b2661444de2a25f2125a831bd786035a9fac4b/substrate/client/network/src/protocol/notifications/handler.rs#L544-L556) + // but since Substrate thinks `outbound1` is still active, it won't open a new outbound substream + // and it ends up having (`inbound2`, `outbound1`) as its pair of substreams which doens't make sense. + // + // since litep2p is expecting to receive an inbound substream from Substrate and never receives it, + // it basically can't make progress with the substream open request because litep2p can't force Substrate + // to detect that `outbound1` is closed. Easiest (and very hacky at the same time) way to reset the substream + // state is to close the connection. This is not an appropriate way to fix the issue and causes issues with, + // e.g., smoldot which at the time of writing this doesn't support the transaction protocol. The only way to fix + // this cleanly is to make Substrate detect closed substreams correctly. + if let Err(error) = self.service.force_close(peer) { + tracing::debug!( + target: LOG_TARGET, + ?peer, + protocol = %self.protocol, + ?error, + "failed to force close connection", + ); + } + } + state => { + tracing::trace!( + target: LOG_TARGET, + ?peer, + protocol = %self.protocol, + ?state, + "ignore expired timer for peer", + ); + context.state = state; + } + } + None => tracing::debug!( + target: LOG_TARGET, + ?peer, + protocol = %self.protocol, + "peer doesn't exist anymore", + ), + } + } + None => (), + }, + event = self.service.next() => match event { + Some(TransportEvent::ConnectionEstablished { peer, .. }) => { + if let Err(error) = self.on_connection_established(peer).await { + tracing::debug!( + target: LOG_TARGET, + ?peer, + ?error, + "failed to register peer", + ); + } + } + Some(TransportEvent::ConnectionClosed { peer }) => { + if let Err(error) = self.on_connection_closed(peer).await { + tracing::debug!( + target: LOG_TARGET, + ?peer, + ?error, + "failed to disconnect peer", + ); + } + } + Some(TransportEvent::SubstreamOpened { + peer, + substream, + direction, + protocol, + fallback, + }) => match direction { + protocol::Direction::Inbound => { + if let Err(error) = self.on_inbound_substream(protocol, fallback, peer, substream).await { + tracing::debug!( + target: LOG_TARGET, + ?peer, + ?error, + "failed to handle inbound substream", + ); + } + } + protocol::Direction::Outbound(substream_id) => { + if let Err(error) = self + .on_outbound_substream(protocol, fallback, peer, substream_id, substream) + .await + { + tracing::debug!( + target: LOG_TARGET, + ?peer, + ?error, + "failed to handle outbound substream", + ); + } + } + }, + Some(TransportEvent::SubstreamOpenFailure { substream, error }) => { + self.on_substream_open_failure(substream, error).await; + } + Some(TransportEvent::DialFailure { peer, addresses }) => self.on_dial_failure(peer, addresses).await, + None => { + tracing::debug!( + target: LOG_TARGET, + protocol = %self.protocol, + "transport service has exited, exiting", + ); + + return true; + } + }, + result = self.pending_validations.select_next_some(), if !self.pending_validations.is_empty() => { + if let Err(error) = self.on_validation_result(result.0, result.1).await { + tracing::debug!( + target: LOG_TARGET, + peer = ?result.0, + result = ?result.1, + ?error, + "failed to handle validation result", + ); + } + } + + // User commands. + command = self.command_rx.recv() => match command { + None => { + tracing::debug!( + target: LOG_TARGET, + protocol = %self.protocol, + "user protocol has exited, exiting" + ); + + self.service.unregister_protocol(); + + return true; + } + Some(command) => match command { + NotificationCommand::OpenSubstream { peers } => { + for peer in peers { + if let Err(error) = self.on_open_substream(peer).await { + tracing::debug!( + target: LOG_TARGET, + ?peer, + ?error, + "failed to open substream", + ); + } + } + } + NotificationCommand::CloseSubstream { peers } => { + for peer in peers { + self.on_close_substream(peer).await; + } + } + NotificationCommand::ForceClose { peer } => { + let _ = self.service.force_close(peer); + } + #[cfg(feature = "fuzz")] + NotificationCommand::SendNotification{ .. } => unreachable!() + } + }, + } + + false + } + + /// Start [`NotificationProtocol`] event loop. + pub(crate) async fn run(mut self) { + tracing::debug!(target: LOG_TARGET, "starting notification event loop"); + + while !self.next_event().await {} + } +} diff --git a/client/litep2p/src/protocol/notification/negotiation.rs b/client/litep2p/src/protocol/notification/negotiation.rs new file mode 100644 index 00000000..9c53c760 --- /dev/null +++ b/client/litep2p/src/protocol/notification/negotiation.rs @@ -0,0 +1,454 @@ +// Copyright 2023 litep2p developers +// +// Permission is hereby granted, free of charge, to any person obtaining a +// copy of this software and associated documentation files (the "Software"), +// to deal in the Software without restriction, including without limitation +// the rights to use, copy, modify, merge, publish, distribute, sublicense, +// and/or sell copies of the Software, and to permit persons to whom the +// Software is furnished to do so, subject to the following conditions: +// +// The above copyright notice and this permission notice shall be included in +// all copies or substantial portions of the Software. +// +// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS +// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE +// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER +// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING +// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER +// DEALINGS IN THE SOFTWARE. + +//! Implementation of the notification handshaking. + +use crate::{substream::Substream, PeerId}; + +use futures::{FutureExt, Sink, Stream}; +use futures_timer::Delay; +use parking_lot::RwLock; + +use std::{ + collections::{HashMap, VecDeque}, + pin::Pin, + sync::Arc, + task::{Context, Poll}, + time::Duration, +}; + +/// Logging target for the file. +const LOG_TARGET: &str = "litep2p::notification::negotiation"; + +/// Maximum timeout wait before for handshake before operation is considered failed. +const NEGOTIATION_TIMEOUT: Duration = Duration::from_secs(10); + +/// Substream direction. +#[derive(Debug, Copy, Clone, PartialEq, Eq, Hash)] +pub enum Direction { + /// Outbound substream, opened by local node. + Outbound, + + /// Inbound substream, opened by remote node. + Inbound, +} + +/// Events emitted by [`HandshakeService`]. +#[derive(Debug)] +pub enum HandshakeEvent { + /// Substream has been negotiated. + Negotiated { + /// Peer ID. + peer: PeerId, + + /// Handshake. + handshake: Vec, + + /// Substream. + substream: Substream, + + /// Direction. + direction: Direction, + }, + + /// Outbound substream has been negotiated. + NegotiationError { + /// Peer ID. + peer: PeerId, + + /// Direction. + direction: Direction, + }, +} + +/// Outbound substream's handshake state +enum HandshakeState { + /// Send handshake to remote peer. + SendHandshake, + + /// Sink is ready for the handshake to be sent. + SinkReady, + + /// Handshake has been sent. + HandshakeSent, + + /// Read handshake from remote peer. + ReadHandshake, +} + +/// Handshake service. +pub(crate) struct HandshakeService { + /// Handshake. + handshake: Arc>>, + + /// Pending outbound substreams. + /// Substreams: + substreams: HashMap<(PeerId, Direction), (Substream, Delay, HandshakeState)>, + + /// Ready substreams. + ready: VecDeque<(PeerId, Direction, Vec)>, +} + +impl HandshakeService { + /// Create new [`HandshakeService`]. + pub fn new(handshake: Arc>>) -> Self { + Self { + handshake, + ready: VecDeque::new(), + substreams: HashMap::new(), + } + } + + /// Remove outbound substream from [`HandshakeService`]. + pub fn remove_outbound(&mut self, peer: &PeerId) -> Option { + self.substreams + .remove(&(*peer, Direction::Outbound)) + .map(|(substream, _, _)| substream) + } + + /// Remove inbound substream from [`HandshakeService`]. + pub fn remove_inbound(&mut self, peer: &PeerId) -> Option { + self.substreams + .remove(&(*peer, Direction::Inbound)) + .map(|(substream, _, _)| substream) + } + + /// Negotiate outbound handshake. + pub fn negotiate_outbound(&mut self, peer: PeerId, substream: Substream) { + tracing::trace!(target: LOG_TARGET, ?peer, "negotiate outbound"); + + self.substreams.insert( + (peer, Direction::Outbound), + ( + substream, + Delay::new(NEGOTIATION_TIMEOUT), + HandshakeState::SendHandshake, + ), + ); + } + + /// Read handshake from remote peer. + pub fn read_handshake(&mut self, peer: PeerId, substream: Substream) { + tracing::trace!(target: LOG_TARGET, ?peer, "read handshake"); + + self.substreams.insert( + (peer, Direction::Inbound), + ( + substream, + Delay::new(NEGOTIATION_TIMEOUT), + HandshakeState::ReadHandshake, + ), + ); + } + + /// Write handshake to remote peer. + pub fn send_handshake(&mut self, peer: PeerId, substream: Substream) { + tracing::trace!(target: LOG_TARGET, ?peer, "send handshake"); + + self.substreams.insert( + (peer, Direction::Inbound), + ( + substream, + Delay::new(NEGOTIATION_TIMEOUT), + HandshakeState::SendHandshake, + ), + ); + } + + /// Returns `true` if [`HandshakeService`] contains no elements. + pub fn is_empty(&self) -> bool { + self.substreams.is_empty() + } + + /// Pop event from the event queue. + /// + /// The substream may not exist in the queue anymore as it may have been removed + /// by `NotificationProtocol` if either one of the substreams failed to negotiate. + fn pop_event(&mut self) -> Option<(PeerId, HandshakeEvent)> { + while let Some((peer, direction, handshake)) = self.ready.pop_front() { + if let Some((substream, _, _)) = self.substreams.remove(&(peer, direction)) { + return Some(( + peer, + HandshakeEvent::Negotiated { + peer, + handshake, + substream, + direction, + }, + )); + } + } + + None + } +} + +impl Stream for HandshakeService { + type Item = (PeerId, HandshakeEvent); + + fn poll_next(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll> { + let inner = Pin::into_inner(self); + + if let Some(event) = inner.pop_event() { + return Poll::Ready(Some(event)); + } + + if inner.substreams.is_empty() { + return Poll::Pending; + } + + 'outer: for ((peer, direction), (ref mut substream, ref mut timer, state)) in + inner.substreams.iter_mut() + { + if let Poll::Ready(()) = timer.poll_unpin(cx) { + return Poll::Ready(Some(( + *peer, + HandshakeEvent::NegotiationError { + peer: *peer, + direction: *direction, + }, + ))); + } + + loop { + let pinned = Pin::new(&mut *substream); + + match state { + HandshakeState::SendHandshake => match pinned.poll_ready(cx) { + Poll::Ready(Ok(())) => { + *state = HandshakeState::SinkReady; + continue; + } + Poll::Ready(Err(_)) => + return Poll::Ready(Some(( + *peer, + HandshakeEvent::NegotiationError { + peer: *peer, + direction: *direction, + }, + ))), + Poll::Pending => continue 'outer, + }, + HandshakeState::SinkReady => { + match pinned.start_send((*inner.handshake.read()).clone().into()) { + Ok(()) => { + *state = HandshakeState::HandshakeSent; + continue; + } + Err(_) => + return Poll::Ready(Some(( + *peer, + HandshakeEvent::NegotiationError { + peer: *peer, + direction: *direction, + }, + ))), + } + } + HandshakeState::HandshakeSent => match pinned.poll_flush(cx) { + Poll::Ready(Ok(())) => match direction { + Direction::Outbound => { + *state = HandshakeState::ReadHandshake; + continue; + } + Direction::Inbound => { + inner.ready.push_back((*peer, *direction, vec![])); + continue 'outer; + } + }, + Poll::Ready(Err(_)) => + return Poll::Ready(Some(( + *peer, + HandshakeEvent::NegotiationError { + peer: *peer, + direction: *direction, + }, + ))), + Poll::Pending => continue 'outer, + }, + HandshakeState::ReadHandshake => match pinned.poll_next(cx) { + Poll::Ready(Some(Ok(handshake))) => { + inner.ready.push_back((*peer, *direction, handshake.freeze().into())); + continue 'outer; + } + Poll::Ready(Some(Err(_))) | Poll::Ready(None) => { + return Poll::Ready(Some(( + *peer, + HandshakeEvent::NegotiationError { + peer: *peer, + direction: *direction, + }, + ))); + } + Poll::Pending => continue 'outer, + }, + } + } + } + + if let Some((peer, direction, handshake)) = inner.ready.pop_front() { + let (substream, _, _) = + inner.substreams.remove(&(peer, direction)).expect("peer to exist"); + + return Poll::Ready(Some(( + peer, + HandshakeEvent::Negotiated { + peer, + handshake, + substream, + direction, + }, + ))); + } + + Poll::Pending + } +} + +#[cfg(test)] +mod tests { + use super::*; + use crate::{ + mock::substream::{DummySubstream, MockSubstream}, + types::SubstreamId, + }; + use futures::StreamExt; + + #[tokio::test] + async fn substream_error_when_sending_handshake() { + let mut service = HandshakeService::new(Arc::new(RwLock::new(vec![1, 2, 3, 4]))); + + futures::future::poll_fn(|cx| match service.poll_next_unpin(cx) { + Poll::Pending => Poll::Ready(()), + _ => panic!("invalid event received"), + }) + .await; + + let mut substream = MockSubstream::new(); + substream.expect_poll_ready().times(1).return_once(|_| Poll::Ready(Ok(()))); + substream + .expect_start_send() + .times(1) + .return_once(|_| Err(crate::error::SubstreamError::ConnectionClosed)); + + let peer = PeerId::random(); + let substream = Substream::new_mock(peer, SubstreamId::from(0usize), Box::new(substream)); + + service.send_handshake(peer, substream); + match service.next().await { + Some(( + failed_peer, + HandshakeEvent::NegotiationError { + peer: event_peer, + direction, + }, + )) => { + assert_eq!(failed_peer, peer); + assert_eq!(event_peer, peer); + assert_eq!(direction, Direction::Inbound); + } + _ => panic!("invalid event received"), + } + } + + #[tokio::test] + async fn substream_error_when_flushing_substream() { + let mut service = HandshakeService::new(Arc::new(RwLock::new(vec![1, 2, 3, 4]))); + + futures::future::poll_fn(|cx| match service.poll_next_unpin(cx) { + Poll::Pending => Poll::Ready(()), + _ => panic!("invalid event received"), + }) + .await; + + let mut substream = MockSubstream::new(); + substream.expect_poll_ready().times(1).return_once(|_| Poll::Ready(Ok(()))); + substream.expect_start_send().times(1).return_once(|_| Ok(())); + substream + .expect_poll_flush() + .times(1) + .return_once(|_| Poll::Ready(Err(crate::error::SubstreamError::ConnectionClosed))); + + let peer = PeerId::random(); + let substream = Substream::new_mock(peer, SubstreamId::from(0usize), Box::new(substream)); + + service.send_handshake(peer, substream); + match service.next().await { + Some(( + failed_peer, + HandshakeEvent::NegotiationError { + peer: event_peer, + direction, + }, + )) => { + assert_eq!(failed_peer, peer); + assert_eq!(event_peer, peer); + assert_eq!(direction, Direction::Inbound); + } + _ => panic!("invalid event received"), + } + } + + // inbound substream is negotiated and it pushed into `inner` but outbound substream fails to + // negotiate + #[tokio::test] + async fn pop_event_but_substream_doesnt_exist() { + let mut service = HandshakeService::new(Arc::new(RwLock::new(vec![1, 2, 3, 4]))); + let peer = PeerId::random(); + + // inbound substream has finished + service.ready.push_front((peer, Direction::Inbound, vec![])); + service.substreams.insert( + (peer, Direction::Inbound), + ( + Substream::new_mock( + peer, + SubstreamId::from(1337usize), + Box::new(DummySubstream::new()), + ), + Delay::new(NEGOTIATION_TIMEOUT), + HandshakeState::HandshakeSent, + ), + ); + service.substreams.insert( + (peer, Direction::Outbound), + ( + Substream::new_mock( + peer, + SubstreamId::from(1337usize), + Box::new(DummySubstream::new()), + ), + Delay::new(NEGOTIATION_TIMEOUT), + HandshakeState::SendHandshake, + ), + ); + + // outbound substream failed and `NotificationProtocol` removes + // both substreams from `HandshakeService` + assert!(service.remove_outbound(&peer).is_some()); + assert!(service.remove_inbound(&peer).is_some()); + + futures::future::poll_fn(|cx| match service.poll_next_unpin(cx) { + Poll::Pending => Poll::Ready(()), + _ => panic!("invalid event received"), + }) + .await + } +} diff --git a/client/litep2p/src/protocol/notification/tests/mod.rs b/client/litep2p/src/protocol/notification/tests/mod.rs new file mode 100644 index 00000000..1775d9b7 --- /dev/null +++ b/client/litep2p/src/protocol/notification/tests/mod.rs @@ -0,0 +1,91 @@ +// Copyright 2023 litep2p developers +// +// Permission is hereby granted, free of charge, to any person obtaining a +// copy of this software and associated documentation files (the "Software"), +// to deal in the Software without restriction, including without limitation +// the rights to use, copy, modify, merge, publish, distribute, sublicense, +// and/or sell copies of the Software, and to permit persons to whom the +// Software is furnished to do so, subject to the following conditions: +// +// The above copyright notice and this permission notice shall be included in +// all copies or substantial portions of the Software. +// +// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS +// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE +// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER +// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING +// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER +// DEALINGS IN THE SOFTWARE. + +use crate::{ + executor::DefaultExecutor, + protocol::{ + notification::{ + handle::NotificationHandle, Config as NotificationConfig, NotificationProtocol, + }, + InnerTransportEvent, ProtocolCommand, SubstreamKeepAlive, TransportService, + }, + transport::{ + manager::{TransportManager, TransportManagerBuilder}, + KEEP_ALIVE_TIMEOUT, + }, + types::protocol::ProtocolName, + PeerId, +}; + +use tokio::sync::mpsc::{channel, Receiver, Sender}; + +#[cfg(test)] +mod notification; +#[cfg(test)] +mod substream_validation; + +/// create new `NotificationProtocol` +fn make_notification_protocol() -> ( + NotificationProtocol, + NotificationHandle, + TransportManager, + Sender, +) { + let manager = TransportManagerBuilder::new().build(); + + let peer = PeerId::random(); + let (transport_service, tx) = TransportService::new( + peer, + ProtocolName::from("/notif/1"), + Vec::new(), + std::sync::Arc::new(Default::default()), + manager.transport_manager_handle(), + KEEP_ALIVE_TIMEOUT, + SubstreamKeepAlive::Yes, + ); + let (config, handle) = NotificationConfig::new( + ProtocolName::from("/notif/1"), + 1024usize, + vec![1, 2, 3, 4], + Vec::new(), + false, + 64, + 64, + true, + ); + + ( + NotificationProtocol::new( + transport_service, + config, + std::sync::Arc::new(DefaultExecutor {}), + ), + handle, + manager, + tx, + ) +} + +/// add new peer to `NotificationProtocol` +fn add_peer() -> (PeerId, (), Receiver) { + let (_tx, rx) = channel(64); + + (PeerId::random(), (), rx) +} diff --git a/client/litep2p/src/protocol/notification/tests/notification.rs b/client/litep2p/src/protocol/notification/tests/notification.rs new file mode 100644 index 00000000..25c30c16 --- /dev/null +++ b/client/litep2p/src/protocol/notification/tests/notification.rs @@ -0,0 +1,1141 @@ +// Copyright 2023 litep2p developers +// +// Permission is hereby granted, free of charge, to any person obtaining a +// copy of this software and associated documentation files (the "Software"), +// to deal in the Software without restriction, including without limitation +// the rights to use, copy, modify, merge, publish, distribute, sublicense, +// and/or sell copies of the Software, and to permit persons to whom the +// Software is furnished to do so, subject to the following conditions: +// +// The above copyright notice and this permission notice shall be included in +// all copies or substantial portions of the Software. +// +// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS +// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE +// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER +// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING +// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER +// DEALINGS IN THE SOFTWARE. + +use crate::{ + mock::substream::{DummySubstream, MockSubstream}, + protocol::{ + self, + connection::ConnectionHandle, + notification::{ + negotiation::HandshakeEvent, + tests::make_notification_protocol, + types::{Direction, NotificationError, NotificationEvent}, + ConnectionState, InboundState, NotificationProtocol, OutboundState, PeerContext, + PeerState, ValidationResult, + }, + InnerTransportEvent, Permit, ProtocolCommand, SubstreamError, + }, + substream::Substream, + transport::Endpoint, + types::{protocol::ProtocolName, ConnectionId, SubstreamId}, + PeerId, +}; + +use futures::StreamExt; +use multiaddr::Multiaddr; +use tokio::sync::{ + mpsc::{channel, Receiver, Sender}, + oneshot, +}; + +use std::{task::Poll, time::Duration}; + +fn next_inbound_state(state: usize) -> InboundState { + match state { + 0 => InboundState::Closed, + 1 => InboundState::ReadingHandshake, + 2 => InboundState::Validating { + inbound: Substream::new_mock( + PeerId::random(), + SubstreamId::from(0usize), + Box::new(MockSubstream::new()), + ), + }, + 3 => InboundState::SendingHandshake, + 4 => InboundState::Open { + inbound: Substream::new_mock( + PeerId::random(), + SubstreamId::from(0usize), + Box::new(MockSubstream::new()), + ), + }, + _ => panic!(), + } +} + +fn next_outbound_state(state: usize) -> OutboundState { + match state { + 0 => OutboundState::Closed, + 1 => OutboundState::OutboundInitiated { + substream: SubstreamId::new(), + }, + 2 => OutboundState::Negotiating, + 3 => OutboundState::Open { + handshake: vec![1, 3, 3, 7], + outbound: Substream::new_mock( + PeerId::random(), + SubstreamId::from(0usize), + Box::new(MockSubstream::new()), + ), + }, + _ => panic!(), + } +} + +#[tokio::test] +async fn connection_closed_for_outbound_open_substream() { + let peer = PeerId::random(); + + for i in 0..5 { + connection_closed( + peer, + PeerState::Validating { + direction: Direction::Inbound, + protocol: ProtocolName::from("/notif/1"), + fallback: None, + outbound: OutboundState::Open { + handshake: vec![1, 2, 3, 4], + outbound: Substream::new_mock( + PeerId::random(), + SubstreamId::from(0usize), + Box::new(MockSubstream::new()), + ), + }, + inbound: next_inbound_state(i), + }, + Some(NotificationEvent::NotificationStreamOpenFailure { + peer, + error: NotificationError::Rejected, + }), + ) + .await; + } +} + +#[tokio::test] +async fn connection_closed_for_outbound_initiated_substream() { + let peer = PeerId::random(); + + for i in 0..5 { + connection_closed( + peer, + PeerState::Validating { + direction: Direction::Inbound, + protocol: ProtocolName::from("/notif/1"), + fallback: None, + outbound: OutboundState::OutboundInitiated { + substream: SubstreamId::from(0usize), + }, + inbound: next_inbound_state(i), + }, + Some(NotificationEvent::NotificationStreamOpenFailure { + peer, + error: NotificationError::Rejected, + }), + ) + .await; + } +} + +#[tokio::test] +async fn connection_closed_for_outbound_negotiated_substream() { + let peer = PeerId::random(); + + for i in 0..5 { + connection_closed( + peer, + PeerState::Validating { + direction: Direction::Inbound, + protocol: ProtocolName::from("/notif/1"), + fallback: None, + outbound: OutboundState::Negotiating, + inbound: next_inbound_state(i), + }, + Some(NotificationEvent::NotificationStreamOpenFailure { + peer, + error: NotificationError::Rejected, + }), + ) + .await; + } +} + +#[tokio::test] +async fn connection_closed_for_initiated_substream() { + let peer = PeerId::random(); + + connection_closed( + peer, + PeerState::OutboundInitiated { + substream: SubstreamId::new(), + }, + Some(NotificationEvent::NotificationStreamOpenFailure { + peer, + error: NotificationError::Rejected, + }), + ) + .await; +} + +#[tokio::test] +#[cfg(debug_assertions)] +#[should_panic] +async fn connection_established_twice() { + let _ = tracing_subscriber::fmt() + .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) + .try_init(); + + let (mut notif, _handle, _sender, _tx) = make_notification_protocol(); + let peer = PeerId::random(); + + assert!(notif.on_connection_established(peer).await.is_ok()); + assert!(notif.on_connection_established(peer).await.is_err()); +} + +#[tokio::test] +#[cfg(debug_assertions)] +#[should_panic] +async fn connection_closed_twice() { + let _ = tracing_subscriber::fmt() + .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) + .try_init(); + + let (mut notif, _handle, _sender, _tx) = make_notification_protocol(); + let peer = PeerId::random(); + + assert!(notif.on_connection_closed(peer).await.is_ok()); + assert!(notif.on_connection_closed(peer).await.is_err()); +} + +#[tokio::test] +#[cfg(debug_assertions)] +#[should_panic] +async fn substream_open_failure_for_unknown_substream() { + let _ = tracing_subscriber::fmt() + .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) + .try_init(); + + let (mut notif, _handle, _sender, _tx) = make_notification_protocol(); + + notif + .on_substream_open_failure(SubstreamId::new(), SubstreamError::ConnectionClosed) + .await; +} + +#[tokio::test] +async fn close_substream_to_unknown_peer() { + let _ = tracing_subscriber::fmt() + .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) + .try_init(); + + let (mut notif, _handle, _sender, _tx) = make_notification_protocol(); + let peer = PeerId::random(); + + assert!(!notif.peers.contains_key(&peer)); + notif.on_close_substream(peer).await; + assert!(!notif.peers.contains_key(&peer)); +} + +#[tokio::test] +#[cfg(debug_assertions)] +#[should_panic] +async fn handshake_event_unknown_peer() { + let _ = tracing_subscriber::fmt() + .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) + .try_init(); + + let (mut notif, _handle, _sender, _tx) = make_notification_protocol(); + let peer = PeerId::random(); + + assert!(!notif.peers.contains_key(&peer)); + notif + .on_handshake_event( + peer, + HandshakeEvent::Negotiated { + peer, + handshake: vec![1, 3, 3, 7], + substream: Substream::new_mock( + peer, + SubstreamId::from(0usize), + Box::new(DummySubstream::new()), + ), + direction: protocol::notification::negotiation::Direction::Inbound, + }, + ) + .await; + assert!(!notif.peers.contains_key(&peer)); +} + +#[tokio::test] +#[cfg(debug_assertions)] +#[should_panic] +async fn handshake_event_invalid_state_for_outbound_substream() { + let _ = tracing_subscriber::fmt() + .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) + .try_init(); + + let (mut notif, _handle, _sender, mut tx) = make_notification_protocol(); + let (peer, _receiver, _permit) = register_peer(&mut notif, &mut tx).await; + + notif + .on_handshake_event( + peer, + HandshakeEvent::Negotiated { + peer, + handshake: vec![1, 3, 3, 7], + substream: Substream::new_mock( + peer, + SubstreamId::from(0usize), + Box::new(DummySubstream::new()), + ), + direction: protocol::notification::negotiation::Direction::Outbound, + }, + ) + .await; +} + +#[tokio::test] +#[cfg(debug_assertions)] +#[should_panic] +async fn substream_open_failure_for_unknown_peer() { + let _ = tracing_subscriber::fmt() + .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) + .try_init(); + + let (mut notif, _handle, _sender, _tx) = make_notification_protocol(); + let peer = PeerId::random(); + let substream_id = SubstreamId::from(1337usize); + + notif.pending_outbound.insert(substream_id, peer); + notif + .on_substream_open_failure(substream_id, SubstreamError::ConnectionClosed) + .await; +} + +#[tokio::test] +async fn dial_failure_for_non_dialing_peer() { + let (mut notif, mut handle, _sender, mut tx) = make_notification_protocol(); + let (peer, _receiver, _permit) = register_peer(&mut notif, &mut tx).await; + + // dial failure for the peer even though it's not dialing + notif.on_dial_failure(peer, vec![]).await; + + assert!(std::matches!( + notif.peers.get(&peer), + Some(PeerContext { + state: PeerState::Closed { .. } + }) + )); + futures::future::poll_fn(|cx| match handle.poll_next_unpin(cx) { + Poll::Pending => Poll::Ready(()), + _ => panic!("invalid event"), + }) + .await; +} + +// inbound state is ignored +async fn connection_closed(peer: PeerId, state: PeerState, event: Option) { + let _ = tracing_subscriber::fmt() + .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) + .try_init(); + + let (mut notif, mut handle, _sender, _tx) = make_notification_protocol(); + + notif.peers.insert(peer, PeerContext { state }); + notif.on_connection_closed(peer).await.unwrap(); + + if let Some(expected) = event { + assert_eq!(handle.next().await.unwrap(), expected); + } + assert!(!notif.peers.contains_key(&peer)) +} + +// register new connection to `NotificationProtocol` +async fn register_peer( + notif: &mut NotificationProtocol, + sender: &mut Sender, +) -> (PeerId, Receiver, Permit) { + let peer = PeerId::random(); + let (conn_tx, conn_rx) = channel(64); + let permit = Permit::new(conn_tx.clone()); + + sender + .send(InnerTransportEvent::ConnectionEstablished { + peer, + connection: ConnectionId::new(), + endpoint: Endpoint::dialer(Multiaddr::empty(), ConnectionId::from(0usize)), + sender: ConnectionHandle::new(ConnectionId::from(0usize), conn_tx), + }) + .await + .unwrap(); + + // poll the protocol to register the peer + notif.next_event().await; + + assert!(std::matches!( + notif.peers.get(&peer), + Some(PeerContext { + state: PeerState::Closed { .. } + }) + )); + + (peer, conn_rx, permit) +} + +#[tokio::test] +async fn open_substream_connection_closed() { + open_substream(PeerState::Closed { pending_open: None }, true).await; +} + +#[tokio::test] +async fn open_substream_already_initiated() { + open_substream( + PeerState::OutboundInitiated { + substream: SubstreamId::new(), + }, + false, + ) + .await; +} + +#[tokio::test] +async fn open_substream_already_open() { + let (shutdown, _rx) = oneshot::channel(); + open_substream(PeerState::Open { shutdown }, false).await; +} + +#[tokio::test] +async fn open_substream_under_validation() { + for i in 0..5 { + for k in 0..4 { + open_substream( + PeerState::Validating { + direction: Direction::Inbound, + protocol: ProtocolName::from("/notif/1"), + fallback: None, + outbound: next_outbound_state(k), + inbound: next_inbound_state(i), + }, + false, + ) + .await; + } + } +} + +async fn open_substream(state: PeerState, succeeds: bool) { + let _ = tracing_subscriber::fmt() + .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) + .try_init(); + + let (mut notif, _handle, _sender, mut tx) = make_notification_protocol(); + let (peer, mut receiver, _permit) = register_peer(&mut notif, &mut tx).await; + + let context = notif.peers.get_mut(&peer).unwrap(); + context.state = state; + + notif.on_open_substream(peer).await.unwrap(); + assert!(receiver.try_recv().is_ok() == succeeds); +} + +#[tokio::test] +async fn open_substream_no_connection() { + let _ = tracing_subscriber::fmt() + .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) + .try_init(); + + let (mut notif, _handle, _sender, _tx) = make_notification_protocol(); + assert!(notif.on_open_substream(PeerId::random()).await.is_err()); +} + +#[tokio::test] +async fn remote_opens_multiple_inbound_substreams() { + let _ = tracing_subscriber::fmt() + .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) + .try_init(); + + let protocol = ProtocolName::from("/notif/1"); + let (mut notif, _handle, _sender, mut tx) = make_notification_protocol(); + let (peer, _receiver, permit) = register_peer(&mut notif, &mut tx).await; + + // open substream, poll the result and verify that the peer is in correct state + tx.send(InnerTransportEvent::SubstreamOpened { + peer, + protocol: protocol.clone(), + fallback: None, + direction: protocol::Direction::Inbound, + substream: Substream::new_mock( + PeerId::random(), + SubstreamId::from(0usize), + Box::new(DummySubstream::new()), + ), + connection_id: ConnectionId::from(0usize), + opening_permit: permit.clone(), + }) + .await + .unwrap(); + notif.next_event().await; + + match notif.peers.get(&peer) { + Some(PeerContext { + state: + PeerState::Validating { + direction: Direction::Inbound, + protocol, + fallback: None, + outbound: OutboundState::Closed, + inbound: InboundState::ReadingHandshake, + }, + }) => { + assert_eq!(protocol, &ProtocolName::from("/notif/1")); + } + state => panic!("invalid state: {state:?}"), + } + + // try to open another substream and verify it's discarded and the state is otherwise + // preserved + let mut substream = MockSubstream::new(); + substream.expect_poll_close().times(1).return_once(|_| Poll::Ready(Ok(()))); + + tx.send(InnerTransportEvent::SubstreamOpened { + peer, + protocol: protocol.clone(), + fallback: None, + direction: protocol::Direction::Inbound, + substream: Substream::new_mock( + PeerId::random(), + SubstreamId::from(0usize), + Box::new(substream), + ), + connection_id: ConnectionId::from(0usize), + opening_permit: permit, + }) + .await + .unwrap(); + notif.next_event().await; + + match notif.peers.get(&peer) { + Some(PeerContext { + state: + PeerState::Validating { + direction: Direction::Inbound, + protocol, + fallback: None, + outbound: OutboundState::Closed, + inbound: InboundState::ReadingHandshake, + }, + }) => { + assert_eq!(protocol, &ProtocolName::from("/notif/1")); + } + state => panic!("invalid state: {state:?}"), + } +} + +#[tokio::test] +async fn pending_outbound_tracked_correctly() { + let _ = tracing_subscriber::fmt() + .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) + .try_init(); + + let protocol = ProtocolName::from("/notif/1"); + let (mut notif, _handle, _sender, mut tx) = make_notification_protocol(); + let (peer, _receiver, _permit) = register_peer(&mut notif, &mut tx).await; + + // open outbound substream + notif.on_open_substream(peer).await.unwrap(); + + match notif.peers.get(&peer) { + Some(PeerContext { + state: PeerState::OutboundInitiated { substream }, + }) => { + assert_eq!(substream, &SubstreamId::new()); + } + state => panic!("invalid state: {state:?}"), + } + + // then register inbound substream and verify that the state is changed to `Validating` + notif + .on_inbound_substream( + protocol.clone(), + None, + peer, + Substream::new_mock( + PeerId::random(), + SubstreamId::from(0usize), + Box::new(DummySubstream::new()), + ), + ) + .await + .unwrap(); + + match notif.peers.get(&peer) { + Some(PeerContext { + state: + PeerState::Validating { + direction: Direction::Outbound, + outbound: OutboundState::OutboundInitiated { .. }, + inbound: InboundState::ReadingHandshake, + .. + }, + }) => {} + state => panic!("invalid state: {state:?}"), + } + + // then negotiation event for the inbound handshake + notif + .on_handshake_event( + peer, + HandshakeEvent::Negotiated { + peer, + handshake: vec![1, 3, 3, 7], + substream: Substream::new_mock( + PeerId::random(), + SubstreamId::from(0usize), + Box::new(DummySubstream::new()), + ), + direction: protocol::notification::negotiation::Direction::Inbound, + }, + ) + .await; + + match notif.peers.get(&peer) { + Some(PeerContext { + state: + PeerState::Validating { + direction: Direction::Outbound, + outbound: OutboundState::OutboundInitiated { .. }, + inbound: InboundState::Validating { .. }, + .. + }, + }) => {} + state => panic!("invalid state: {state:?}"), + } + + // then reject the inbound peer even though an outbound substream was already established + notif.on_validation_result(peer, ValidationResult::Reject).await.unwrap(); + + match notif.peers.get(&peer) { + Some(PeerContext { + state: PeerState::Closed { pending_open }, + }) => { + assert_eq!(pending_open, &Some(SubstreamId::new())); + } + state => panic!("invalid state: {state:?}"), + } + + // finally the outbound substream registers, verify that `pending_open` is set to `None` + notif + .on_outbound_substream( + protocol, + None, + peer, + SubstreamId::new(), + Substream::new_mock( + PeerId::random(), + SubstreamId::from(0usize), + Box::new(DummySubstream::new()), + ), + ) + .await + .unwrap(); + + match notif.peers.get(&peer) { + Some(PeerContext { + state: PeerState::Closed { pending_open }, + }) => { + assert!(pending_open.is_none()); + } + state => panic!("invalid state: {state:?}"), + } +} + +#[tokio::test] +async fn inbound_accepted_outbound_fails_to_open() { + let _ = tracing_subscriber::fmt() + .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) + .try_init(); + + let protocol = ProtocolName::from("/notif/1"); + let (mut notif, mut handle, sender, mut tx) = make_notification_protocol(); + let (peer, receiver, _permit) = register_peer(&mut notif, &mut tx).await; + + // register inbound substream and verify that the state is `Validating` + notif + .on_inbound_substream( + protocol.clone(), + None, + peer, + Substream::new_mock( + PeerId::random(), + SubstreamId::from(0usize), + Box::new(DummySubstream::new()), + ), + ) + .await + .unwrap(); + + match notif.peers.get(&peer) { + Some(PeerContext { + state: + PeerState::Validating { + direction: Direction::Inbound, + outbound: OutboundState::Closed, + inbound: InboundState::ReadingHandshake, + .. + }, + }) => {} + state => panic!("invalid state: {state:?}"), + } + + // then negotiation event for the inbound handshake + notif + .on_handshake_event( + peer, + HandshakeEvent::Negotiated { + peer, + handshake: vec![1, 3, 3, 7], + substream: Substream::new_mock( + PeerId::random(), + SubstreamId::from(0usize), + Box::new(DummySubstream::new()), + ), + direction: protocol::notification::negotiation::Direction::Inbound, + }, + ) + .await; + + match notif.peers.get(&peer) { + Some(PeerContext { + state: + PeerState::Validating { + direction: Direction::Inbound, + outbound: OutboundState::Closed, + inbound: InboundState::Validating { .. }, + .. + }, + }) => {} + state => panic!("invalid state: {state:?}"), + } + + // discard the validation event + assert!(tokio::time::timeout(Duration::from_secs(5), handle.next()).await.is_ok()); + + // before the validation event is registered, close the connection + drop(sender); + drop(receiver); + drop(tx); + + // then reject the inbound peer even though an outbound substream was already established + assert!(notif.on_validation_result(peer, ValidationResult::Accept).await.is_err()); + + match notif.peers.get(&peer) { + Some(PeerContext { + state: PeerState::Closed { pending_open }, + }) => { + assert!(pending_open.is_none()); + } + state => panic!("invalid state: {state:?}"), + } + + // verify that the user is not reported anything + match tokio::time::timeout(Duration::from_secs(1), handle.next()).await { + Err(_) => panic!("unexpected timeout"), + Ok(Some(NotificationEvent::NotificationStreamOpenFailure { + peer: event_peer, + error, + })) => { + assert_eq!(peer, event_peer); + assert_eq!(error, NotificationError::Rejected) + } + _ => panic!("invalid event"), + } +} + +#[tokio::test] +async fn open_substream_on_closed_connection() { + let _ = tracing_subscriber::fmt() + .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) + .try_init(); + + let (mut notif, mut handle, sender, mut tx) = make_notification_protocol(); + let (peer, receiver, _permit) = register_peer(&mut notif, &mut tx).await; + + // before processing the open substream event, close the connection + drop(sender); + drop(receiver); + drop(tx); + + // open outbound substream + notif.on_open_substream(peer).await.unwrap(); + + match notif.peers.get(&peer) { + Some(PeerContext { + state: PeerState::Closed { pending_open: None }, + }) => {} + state => panic!("invalid state: {state:?}"), + } + + match tokio::time::timeout(Duration::from_secs(5), handle.next()) + .await + .expect("operation to succeed") + { + Some(NotificationEvent::NotificationStreamOpenFailure { error, .. }) => { + assert_eq!(error, NotificationError::NoConnection); + } + event => panic!("invalid event received: {event:?}"), + } +} + +// `NotificationHandle` may have an inconsistent view of the peer state and connection to peer may +// already been closed by the time `close_substream()` is called but this event hasn't yet been +// registered to `NotificationHandle` which causes it to send a stale disconnection request to +// `NotificationProtocol`. +// +// verify that `NotificationProtocol` ignores stale disconnection requests +#[tokio::test] +async fn close_already_closed_connection() { + let _ = tracing_subscriber::fmt() + .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) + .try_init(); + + let (mut notif, mut handle, _, mut tx) = make_notification_protocol(); + let (peer, _, _permit) = register_peer(&mut notif, &mut tx).await; + + notif.peers.insert( + peer, + PeerContext { + state: PeerState::Validating { + protocol: ProtocolName::from("/notif/1"), + fallback: None, + direction: Direction::Inbound, + outbound: OutboundState::Open { + handshake: vec![1, 2, 3, 4], + outbound: Substream::new_mock( + PeerId::random(), + SubstreamId::from(0usize), + Box::new(MockSubstream::new()), + ), + }, + inbound: InboundState::SendingHandshake, + }, + }, + ); + notif + .on_handshake_event( + peer, + HandshakeEvent::Negotiated { + peer, + handshake: vec![1], + substream: Substream::new_mock( + PeerId::random(), + SubstreamId::from(0usize), + Box::new(MockSubstream::new()), + ), + direction: protocol::notification::negotiation::Direction::Inbound, + }, + ) + .await; + + match handle.next().await { + Some(NotificationEvent::NotificationStreamOpened { .. }) => {} + _ => panic!("invalid event received"), + } + + // close the substream but don't poll the `NotificationHandle` + notif.shutdown_tx.send(peer).await.unwrap(); + + // close the connection using the handle + handle.close_substream(peer).await; + + // process the events + notif.next_event().await; + notif.next_event().await; + + match notif.peers.get(&peer) { + Some(PeerContext { + state: PeerState::Closed { pending_open: None }, + }) => {} + state => panic!("invalid state: {state:?}"), + } +} + +/// Notification state was not reset correctly if the outbound substream failed to open after +/// inbound substream had been negotiated, causing `NotificationProtocol` to report open failure +/// twice, once when the failure occurred and again when the connection was closed. +#[tokio::test] +async fn open_failure_reported_once() { + let _ = tracing_subscriber::fmt() + .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) + .try_init(); + + let (mut notif, mut handle, _, mut tx) = make_notification_protocol(); + let (peer, _, _permit) = register_peer(&mut notif, &mut tx).await; + + // move `peer` to state where the inbound substream has been negotiated + // and the local node has initiated an outbound substream + notif.peers.insert( + peer, + PeerContext { + state: PeerState::Validating { + protocol: ProtocolName::from("/notif/1"), + fallback: None, + direction: Direction::Inbound, + outbound: OutboundState::OutboundInitiated { + substream: SubstreamId::from(1337usize), + }, + inbound: InboundState::Open { + inbound: Substream::new_mock( + peer, + SubstreamId::from(0usize), + Box::new(DummySubstream::new()), + ), + }, + }, + }, + ); + notif.pending_outbound.insert(SubstreamId::from(1337usize), peer); + + notif + .on_substream_open_failure( + SubstreamId::from(1337usize), + SubstreamError::ConnectionClosed, + ) + .await; + + match handle.next().await { + Some(NotificationEvent::NotificationStreamOpenFailure { + peer: failed_peer, + error, + }) => { + assert_eq!(failed_peer, peer); + assert_eq!(error, NotificationError::Rejected); + } + _ => panic!("invalid event received"), + } + + match notif.peers.get(&peer) { + Some(PeerContext { + state: PeerState::Closed { pending_open }, + }) => { + assert_eq!(pending_open, &Some(SubstreamId::from(1337usize))); + } + state => panic!("invalid state for peer: {state:?}"), + } + + // connection to `peer` is closed + notif.on_connection_closed(peer).await.unwrap(); + + futures::future::poll_fn(|cx| match handle.poll_next_unpin(cx) { + Poll::Pending => Poll::Ready(()), + result => panic!("didn't expect event from channel, got {result:?}"), + }) + .await; +} + +// inboud substrem was received and it was sent to user for validation +// +// the validation took so long that remote opened another substream while validation for the +// previous inbound substrem was still pending +// +// verify that the new substream is rejected and that the peer state is set to `ValidationPending` +#[tokio::test] +async fn second_inbound_substream_rejected() { + let _ = tracing_subscriber::fmt() + .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) + .try_init(); + + let (mut notif, mut handle, _, mut tx) = make_notification_protocol(); + let (peer, _, _permit) = register_peer(&mut notif, &mut tx).await; + + // move peer state to `Validating` + let mut substream1 = MockSubstream::new(); + substream1.expect_poll_close().times(1).return_once(|_| Poll::Ready(Ok(()))); + + notif.peers.insert( + peer, + PeerContext { + state: PeerState::Validating { + protocol: ProtocolName::from("/notif/1"), + fallback: None, + direction: Direction::Inbound, + outbound: OutboundState::Closed, + inbound: InboundState::Validating { + inbound: Substream::new_mock( + peer, + SubstreamId::from(0usize), + Box::new(substream1), + ), + }, + }, + }, + ); + + // open a new inbound substream because validation took so long that `peer` decided + // to open a new substream + let mut substream2 = MockSubstream::new(); + substream2.expect_poll_close().times(1).return_once(|_| Poll::Ready(Ok(()))); + notif + .on_inbound_substream( + ProtocolName::from("/notif/1"), + None, + peer, + Substream::new_mock(peer, SubstreamId::from(0usize), Box::new(substream2)), + ) + .await + .unwrap(); + + // verify that peer is moved to `ValidationPending` + match notif.peers.get(&peer) { + Some(PeerContext { + state: + PeerState::ValidationPending { + state: ConnectionState::Open, + }, + }) => {} + state => panic!("invalid state for peer: {state:?}"), + } + + // user decide to reject the substream, verify that nothing is received over the event handle + notif.on_validation_result(peer, ValidationResult::Reject).await.unwrap(); + + notif.on_connection_closed(peer).await.unwrap(); + futures::future::poll_fn(|cx| match handle.poll_next_unpin(cx) { + Poll::Pending => Poll::Ready(()), + result => panic!("didn't expect event from channel, got {result:?}"), + }) + .await; +} + +// remote opened a substream, it was accepted by the local node and local node opened an outbound +// substream but it took so long to open that the inbound substream was closed and while the +// outbound substream was opening, another inbound substream was received from peer +// +// verify that this second inbound substream is rejected as an outbound substream for the previous +// connection is still pending +#[tokio::test] +async fn second_inbound_substream_opened_while_outbound_substream_was_opening() { + let _ = tracing_subscriber::fmt() + .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) + .try_init(); + + let (mut notif, mut handle, _zz, mut tx) = make_notification_protocol(); + let (peer, _zz, _permit) = register_peer(&mut notif, &mut tx).await; + + // move peer state to `Validating` + let mut substream1 = MockSubstream::new(); + substream1 + .expect_poll_ready() + .times(1) + .return_once(|_| Poll::Ready(Err(SubstreamError::ConnectionClosed))); + + notif.peers.insert( + peer, + PeerContext { + state: PeerState::Validating { + protocol: ProtocolName::from("/notif/1"), + fallback: None, + direction: Direction::Inbound, + outbound: OutboundState::Closed, + inbound: InboundState::Validating { + inbound: Substream::new_mock( + peer, + SubstreamId::from(0usize), + Box::new(substream1), + ), + }, + }, + }, + ); + + // accept the inbound substream which is now closed + notif.on_validation_result(peer, ValidationResult::Accept).await.unwrap(); + + // verify that peer is sending handshake and that outbound substream is opening + let substream_id = match notif.peers.get(&peer) { + Some(PeerContext { + state: + PeerState::Validating { + fallback: None, + direction: Direction::Inbound, + outbound: OutboundState::OutboundInitiated { substream }, + inbound: InboundState::SendingHandshake, + .. + }, + }) => *substream, + state => panic!("invalid state for peer: {state:?}"), + }; + + // poll the protocol and send handshake over the inbound substream + notif.next_event().await; + + // verify that peer is closed + match notif.peers.get(&peer) { + Some(PeerContext { + state: + PeerState::Closed { + pending_open: Some(pending_open), + }, + }) => { + assert_eq!(substream_id, *pending_open); + } + state => panic!("invalid state for peer: {state:?}"), + } + + match handle.next().await { + Some(NotificationEvent::NotificationStreamOpenFailure { .. }) => {} + _ => panic!("invalid event received"), + } + + // remote open second inbound substream + let mut substream2 = MockSubstream::new(); + substream2.expect_poll_close().times(1).return_once(|_| Poll::Ready(Ok(()))); + + notif + .on_inbound_substream( + ProtocolName::from("/notif/1"), + None, + peer, + Substream::new_mock(peer, SubstreamId::from(0usize), Box::new(substream2)), + ) + .await + .unwrap(); + + // verify that peer is still closed + match notif.peers.get(&peer) { + Some(PeerContext { + state: + PeerState::Closed { + pending_open: Some(pending_open), + }, + }) => { + assert_eq!(substream_id, *pending_open); + } + state => panic!("invalid state for peer: {state:?}"), + } +} + +#[tokio::test] +async fn drop_handle_exits_protocol() { + let _ = tracing_subscriber::fmt() + .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) + .try_init(); + + let (mut protocol, handle, _sender, _tx) = make_notification_protocol(); + + // Simulate a handle drop. + drop(handle); + + // Call `next_event` and ensure it returns true. + let result = protocol.next_event().await; + assert!( + result, + "Expected `next_event` to return true when `command_rx` is dropped" + ); +} diff --git a/client/litep2p/src/protocol/notification/tests/substream_validation.rs b/client/litep2p/src/protocol/notification/tests/substream_validation.rs new file mode 100644 index 00000000..27e39181 --- /dev/null +++ b/client/litep2p/src/protocol/notification/tests/substream_validation.rs @@ -0,0 +1,467 @@ +// Copyright 2023 litep2p developers +// +// Permission is hereby granted, free of charge, to any person obtaining a +// copy of this software and associated documentation files (the "Software"), +// to deal in the Software without restriction, including without limitation +// the rights to use, copy, modify, merge, publish, distribute, sublicense, +// and/or sell copies of the Software, and to permit persons to whom the +// Software is furnished to do so, subject to the following conditions: +// +// The above copyright notice and this permission notice shall be included in +// all copies or substantial portions of the Software. +// +// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS +// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE +// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER +// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING +// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER +// DEALINGS IN THE SOFTWARE. + +use crate::{ + error::{Error, SubstreamError}, + mock::substream::MockSubstream, + protocol::{ + connection::ConnectionHandle, + notification::{ + negotiation::HandshakeEvent, + tests::{add_peer, make_notification_protocol}, + types::{Direction, NotificationEvent, ValidationResult}, + InboundState, OutboundState, PeerContext, PeerState, + }, + InnerTransportEvent, ProtocolCommand, + }, + substream::Substream, + transport::Endpoint, + types::{protocol::ProtocolName, ConnectionId, SubstreamId}, + PeerId, +}; + +use bytes::BytesMut; +use futures::StreamExt; +use multiaddr::Multiaddr; +use tokio::sync::{mpsc::channel, oneshot}; + +use std::task::Poll; + +#[tokio::test] +async fn non_existent_peer() { + let (mut notif, _handle, _sender, _) = make_notification_protocol(); + + if let Err(err) = notif.on_validation_result(PeerId::random(), ValidationResult::Accept).await { + assert!(std::matches!(err, Error::PeerDoesntExist(_))); + } +} + +#[tokio::test] +async fn substream_accepted() { + let _ = tracing_subscriber::fmt() + .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) + .try_init(); + + let (mut notif, mut handle, _sender, tx) = make_notification_protocol(); + let (peer, _service, _receiver) = add_peer(); + let handshake = BytesMut::from(&b"hello"[..]); + let mut substream = MockSubstream::new(); + substream + .expect_poll_next() + .times(1) + .return_once(|_| Poll::Ready(Some(Ok(BytesMut::from(&b"hello"[..]))))); + substream.expect_poll_ready().times(1).return_once(|_| Poll::Ready(Ok(()))); + substream.expect_start_send().times(1).return_once(|_| Ok(())); + substream.expect_poll_flush().times(1).return_once(|_| Poll::Ready(Ok(()))); + + let (proto_tx, mut proto_rx) = channel(256); + tx.send(InnerTransportEvent::ConnectionEstablished { + peer, + endpoint: Endpoint::dialer(Multiaddr::empty(), ConnectionId::from(0usize)), + sender: ConnectionHandle::new(ConnectionId::from(0usize), proto_tx.clone()), + connection: ConnectionId::from(0usize), + }) + .await + .unwrap(); + + // connect peer and verify it's in closed state + notif.next_event().await; + + match ¬if.peers.get(&peer).unwrap().state { + PeerState::Closed { .. } => {} + state => panic!("invalid state for peer: {state:?}"), + } + + // open inbound substream and verify that peer state has changed to `Validating` + notif + .on_inbound_substream( + ProtocolName::from("/notif/1"), + None, + peer, + Substream::new_mock( + PeerId::random(), + SubstreamId::from(0usize), + Box::new(substream), + ), + ) + .await + .unwrap(); + + match ¬if.peers.get(&peer).unwrap().state { + PeerState::Validating { + direction: Direction::Inbound, + protocol: _, + fallback: None, + inbound: InboundState::ReadingHandshake, + outbound: OutboundState::Closed, + } => {} + state => panic!("invalid state for peer: {state:?}"), + } + + // get negotiation event + let (peer, event) = notif.negotiation.next().await.unwrap(); + notif.on_handshake_event(peer, event).await; + + // user protocol receives the protocol accepts it + assert_eq!( + handle.next().await.unwrap(), + NotificationEvent::ValidateSubstream { + protocol: ProtocolName::from("/notif/1"), + fallback: None, + peer, + handshake: handshake.into() + }, + ); + notif.on_validation_result(peer, ValidationResult::Accept).await.unwrap(); + + // poll negotiation to finish the handshake + let (peer, event) = notif.negotiation.next().await.unwrap(); + notif.on_handshake_event(peer, event).await; + + // protocol asks for outbound substream to be opened and its state is changed accordingly + let ProtocolCommand::OpenSubstream { + protocol, + substream_id, + .. + } = proto_rx.recv().await.unwrap() + else { + panic!("invalid commnd received"); + }; + assert_eq!(protocol, ProtocolName::from("/notif/1")); + assert_eq!(substream_id, SubstreamId::from(0usize)); + + let expected = SubstreamId::from(0usize); + + match ¬if.peers.get(&peer).unwrap().state { + PeerState::Validating { + direction: Direction::Inbound, + protocol: _, + fallback: None, + inbound: InboundState::Open { .. }, + outbound: OutboundState::OutboundInitiated { substream }, + } => { + assert_eq!(substream, &expected); + } + state => panic!("invalid state for peer: {state:?}"), + } +} + +#[tokio::test] +async fn substream_rejected() { + let _ = tracing_subscriber::fmt() + .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) + .try_init(); + + let (mut notif, mut handle, _sender, _tx) = make_notification_protocol(); + let (peer, _service, mut receiver) = add_peer(); + let handshake = BytesMut::from(&b"hello"[..]); + let mut substream = MockSubstream::new(); + substream + .expect_poll_next() + .times(1) + .return_once(|_| Poll::Ready(Some(Ok(BytesMut::from(&b"hello"[..]))))); + substream.expect_poll_close().times(1).return_once(|_| Poll::Ready(Ok(()))); + + // connect peer and verify it's in closed state + notif.on_connection_established(peer).await.unwrap(); + + match ¬if.peers.get(&peer).unwrap().state { + PeerState::Closed { .. } => {} + state => panic!("invalid state for peer: {state:?}"), + } + + // open inbound substream and verify that peer state has changed to `Validating` + notif + .on_inbound_substream( + ProtocolName::from("/notif/1"), + None, + peer, + Substream::new_mock( + PeerId::random(), + SubstreamId::from(0usize), + Box::new(substream), + ), + ) + .await + .unwrap(); + + match ¬if.peers.get(&peer).unwrap().state { + PeerState::Validating { + direction: Direction::Inbound, + protocol: _, + fallback: None, + inbound: InboundState::ReadingHandshake, + outbound: OutboundState::Closed, + } => {} + state => panic!("invalid state for peer: {state:?}"), + } + + // get negotiation event + let (peer, event) = notif.negotiation.next().await.unwrap(); + notif.on_handshake_event(peer, event).await; + + // user protocol receives the protocol accepts it + assert_eq!( + handle.next().await.unwrap(), + NotificationEvent::ValidateSubstream { + protocol: ProtocolName::from("/notif/1"), + fallback: None, + peer, + handshake: handshake.into() + }, + ); + notif.on_validation_result(peer, ValidationResult::Reject).await.unwrap(); + + // substream is rejected so no outbound substraem is opened and peer is converted to closed + // state + match ¬if.peers.get(&peer).unwrap().state { + PeerState::Closed { .. } => {} + state => panic!("invalid state for peer: {state:?}"), + } + + assert!(receiver.try_recv().is_err()); +} + +#[tokio::test] +async fn accept_fails_due_to_closed_substream() { + let _ = tracing_subscriber::fmt() + .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) + .try_init(); + + let (mut notif, mut handle, _sender, tx) = make_notification_protocol(); + let (peer, _service, _receiver) = add_peer(); + let handshake = BytesMut::from(&b"hello"[..]); + let mut substream = MockSubstream::new(); + substream + .expect_poll_next() + .times(1) + .return_once(|_| Poll::Ready(Some(Ok(BytesMut::from(&b"hello"[..]))))); + substream + .expect_poll_ready() + .times(1) + .return_once(|_| Poll::Ready(Err(SubstreamError::ConnectionClosed))); + + let (proto_tx, _proto_rx) = channel(256); + tx.send(InnerTransportEvent::ConnectionEstablished { + peer, + endpoint: Endpoint::dialer(Multiaddr::empty(), ConnectionId::from(0usize)), + sender: ConnectionHandle::new(ConnectionId::from(0usize), proto_tx), + connection: ConnectionId::from(0usize), + }) + .await + .unwrap(); + + // connect peer and verify it's in closed state + notif.next_event().await; + + match ¬if.peers.get(&peer).unwrap().state { + PeerState::Closed { .. } => {} + state => panic!("invalid state for peer: {state:?}"), + } + + // open inbound substream and verify that peer state has changed to `InboundOpen` + notif + .on_inbound_substream( + ProtocolName::from("/notif/1"), + None, + peer, + Substream::new_mock( + PeerId::random(), + SubstreamId::from(0usize), + Box::new(substream), + ), + ) + .await + .unwrap(); + + match ¬if.peers.get(&peer).unwrap().state { + PeerState::Validating { + direction: Direction::Inbound, + protocol: _, + fallback: None, + inbound: InboundState::ReadingHandshake, + outbound: OutboundState::Closed, + } => {} + state => panic!("invalid state for peer: {state:?}"), + } + + // get negotiation event + let (peer, event) = notif.negotiation.next().await.unwrap(); + notif.on_handshake_event(peer, event).await; + + // user protocol receives the protocol accepts it + assert_eq!( + handle.next().await.unwrap(), + NotificationEvent::ValidateSubstream { + protocol: ProtocolName::from("/notif/1"), + fallback: None, + peer, + handshake: handshake.into() + }, + ); + + notif.on_validation_result(peer, ValidationResult::Accept).await.unwrap(); + + // get negotiation event + let (event_peer, event) = notif.negotiation.next().await.unwrap(); + match &event { + HandshakeEvent::NegotiationError { peer, .. } => { + assert_eq!(*peer, event_peer); + } + event => panic!("invalid event for peer: {event:?}"), + } + notif.on_handshake_event(peer, event).await; + + match ¬if.peers.get(&peer).unwrap().state { + PeerState::Closed { .. } => {} + state => panic!("invalid state for peer: {state:?}"), + } +} + +#[tokio::test] +async fn accept_fails_due_to_closed_connection() { + let _ = tracing_subscriber::fmt() + .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) + .try_init(); + + let (mut notif, mut handle, _sender, tx) = make_notification_protocol(); + let (peer, _service, _receiver) = add_peer(); + let handshake = BytesMut::from(&b"hello"[..]); + let mut substream = MockSubstream::new(); + substream + .expect_poll_next() + .times(1) + .return_once(|_| Poll::Ready(Some(Ok(BytesMut::from(&b"hello"[..]))))); + substream.expect_poll_close().times(1).return_once(|_| Poll::Ready(Ok(()))); + + let (proto_tx, proto_rx) = channel(256); + tx.send(InnerTransportEvent::ConnectionEstablished { + peer, + endpoint: Endpoint::dialer(Multiaddr::empty(), ConnectionId::from(0usize)), + sender: ConnectionHandle::new(ConnectionId::from(0usize), proto_tx), + connection: ConnectionId::from(0usize), + }) + .await + .unwrap(); + + // connect peer and verify it's in closed state + notif.next_event().await; + + match notif.peers.get(&peer).unwrap().state { + PeerState::Closed { .. } => {} + _ => panic!("invalid state for peer"), + } + + // open inbound substream and verify that peer state has changed to `InboundOpen` + notif + .on_inbound_substream( + ProtocolName::from("/notif/1"), + None, + peer, + Substream::new_mock( + PeerId::random(), + SubstreamId::from(0usize), + Box::new(substream), + ), + ) + .await + .unwrap(); + + match ¬if.peers.get(&peer).unwrap().state { + PeerState::Validating { + direction: Direction::Inbound, + protocol: _, + fallback: None, + inbound: InboundState::ReadingHandshake, + outbound: OutboundState::Closed, + } => {} + state => panic!("invalid state for peer: {state:?}"), + } + + // get negotiation event + let (peer, event) = notif.negotiation.next().await.unwrap(); + notif.on_handshake_event(peer, event).await; + + // user protocol receives the protocol accepts it + assert_eq!( + handle.next().await.unwrap(), + NotificationEvent::ValidateSubstream { + protocol: ProtocolName::from("/notif/1"), + fallback: None, + peer, + handshake: handshake.into() + }, + ); + + // drop the connection and verify that the protocol doesn't make any outbound substream + // requests and instead marks the connection as closed + drop(proto_rx); + + assert!(notif.on_validation_result(peer, ValidationResult::Accept).await.is_err()); + + match ¬if.peers.get(&peer).unwrap().state { + PeerState::Closed { .. } => {} + state => panic!("invalid state for peer: {state:?}"), + } +} + +#[tokio::test] +#[should_panic] +#[cfg(debug_assertions)] +async fn open_substream_accepted() { + use tokio::sync::oneshot; + + let (mut notif, _handle, _sender, _tx) = make_notification_protocol(); + let (peer, _service, _receiver) = add_peer(); + let (shutdown, _rx) = oneshot::channel(); + + notif.peers.insert( + peer, + PeerContext { + state: PeerState::Open { shutdown }, + }, + ); + + // try to accept a closed substream + notif.on_close_substream(peer).await; + + assert!(notif.on_validation_result(peer, ValidationResult::Accept).await.is_err()); +} + +#[tokio::test] +#[should_panic] +#[cfg(debug_assertions)] +async fn open_substream_rejected() { + let (mut notif, _handle, _sender, _tx) = make_notification_protocol(); + let (peer, _service, _receiver) = add_peer(); + let (shutdown, _rx) = oneshot::channel(); + + notif.peers.insert( + peer, + PeerContext { + state: PeerState::Open { shutdown }, + }, + ); + + // try to reject a closed substream + notif.on_close_substream(peer).await; + + assert!(notif.on_validation_result(peer, ValidationResult::Reject).await.is_err()); +} diff --git a/client/litep2p/src/protocol/notification/types.rs b/client/litep2p/src/protocol/notification/types.rs new file mode 100644 index 00000000..5afc514d --- /dev/null +++ b/client/litep2p/src/protocol/notification/types.rs @@ -0,0 +1,225 @@ +// Copyright 2023 litep2p developers +// +// Permission is hereby granted, free of charge, to any person obtaining a +// copy of this software and associated documentation files (the "Software"), +// to deal in the Software without restriction, including without limitation +// the rights to use, copy, modify, merge, publish, distribute, sublicense, +// and/or sell copies of the Software, and to permit persons to whom the +// Software is furnished to do so, subject to the following conditions: +// +// The above copyright notice and this permission notice shall be included in +// all copies or substantial portions of the Software. +// +// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS +// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE +// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER +// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING +// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER +// DEALINGS IN THE SOFTWARE. + +use crate::{ + protocol::notification::handle::NotificationSink, types::protocol::ProtocolName, PeerId, +}; + +use bytes::BytesMut; +use tokio::sync::oneshot; + +use std::collections::HashSet; + +/// Default channel size for synchronous notifications. +pub(super) const SYNC_CHANNEL_SIZE: usize = 2048; + +/// Default channel size for asynchronous notifications. +pub(super) const ASYNC_CHANNEL_SIZE: usize = 8; + +/// Direction of the connection. +#[derive(Debug, Copy, Clone, PartialEq, Eq)] +pub enum Direction { + /// Connection is considered inbound, i.e., it was initiated by the remote node. + Inbound, + + /// Connection is considered outbound, i.e., it was initiated by the local node. + Outbound, +} + +/// Validation result. +#[derive(Debug, Copy, Clone, PartialEq, Eq)] +pub enum ValidationResult { + /// Accept the inbound substream. + Accept, + + /// Reject the inbound substream. + Reject, +} + +/// Notification error. +#[derive(Debug, Clone, PartialEq, Eq)] +pub enum NotificationError { + /// Remote rejected the substream. + Rejected, + + /// Connection to peer doesn't exist. + NoConnection, + + /// Synchronous notification channel is clogged. + ChannelClogged, + + /// Validation for a previous substream still pending. + ValidationPending, + + /// Failed to dial peer. + DialFailure, + + /// Notification protocol has been closed. + EssentialTaskClosed, +} + +/// Notification events. +pub(crate) enum InnerNotificationEvent { + /// Validate substream. + ValidateSubstream { + /// Protocol name. + protocol: ProtocolName, + + /// Fallback, if the substream was negotiated using a fallback protocol. + fallback: Option, + + /// Peer ID. + peer: PeerId, + + /// Handshake. + handshake: Vec, + + /// `oneshot::Sender` for sending the validation result back to the protocol. + tx: oneshot::Sender, + }, + + /// Notification stream opened. + NotificationStreamOpened { + /// Protocol name. + protocol: ProtocolName, + + /// Fallback, if the substream was negotiated using a fallback protocol. + fallback: Option, + + /// Direction of the substream. + direction: Direction, + + /// Peer ID. + peer: PeerId, + + /// Handshake. + handshake: Vec, + + /// Notification sink. + sink: NotificationSink, + }, + + /// Notification stream closed. + NotificationStreamClosed { + /// Peer ID. + peer: PeerId, + }, + + /// Failed to open notification stream. + NotificationStreamOpenFailure { + /// Peer ID. + peer: PeerId, + + /// Error. + error: NotificationError, + }, +} + +/// Notification events. +#[derive(Debug, Clone, PartialEq, Eq)] +pub enum NotificationEvent { + /// Validate substream. + ValidateSubstream { + /// Protocol name. + protocol: ProtocolName, + + /// Fallback, if the substream was negotiated using a fallback protocol. + fallback: Option, + + /// Peer ID. + peer: PeerId, + + /// Handshake. + handshake: Vec, + }, + + /// Notification stream opened. + NotificationStreamOpened { + /// Protocol name. + protocol: ProtocolName, + + /// Fallback, if the substream was negotiated using a fallback protocol. + fallback: Option, + + /// Direction of the substream. + /// + /// [`Direction::Inbound`](crate::protocol::Direction::Outbound) indicates that the + /// substream was opened by the remote peer and + /// [`Direction::Outbound`](crate::protocol::Direction::Outbound) that it was + /// opened by the local node. + direction: Direction, + + /// Peer ID. + peer: PeerId, + + /// Handshake. + handshake: Vec, + }, + + /// Notification stream closed. + NotificationStreamClosed { + /// Peer ID. + peer: PeerId, + }, + + /// Failed to open notification stream. + NotificationStreamOpenFailure { + /// Peer ID. + peer: PeerId, + + /// Error. + error: NotificationError, + }, + + /// Notification received. + NotificationReceived { + /// Peer ID. + peer: PeerId, + + /// Notification. + notification: BytesMut, + }, +} + +/// Notification commands sent to the protocol. +#[derive(Debug)] +#[cfg_attr(feature = "fuzz", derive(serde::Serialize, serde::Deserialize))] +pub enum NotificationCommand { + /// Open substreams to one or more peers. + OpenSubstream { + /// Peer IDs. + peers: HashSet, + }, + + /// Close substreams to one or more peers. + CloseSubstream { + /// Peer IDs. + peers: HashSet, + }, + + /// Force close the connection because notification channel is clogged. + ForceClose { + /// Peer to disconnect. + peer: PeerId, + }, + + #[cfg(feature = "fuzz")] + SendNotification { notif: Vec, peer_id: PeerId }, +} diff --git a/client/litep2p/src/protocol/protocol_set.rs b/client/litep2p/src/protocol/protocol_set.rs new file mode 100644 index 00000000..a4618807 --- /dev/null +++ b/client/litep2p/src/protocol/protocol_set.rs @@ -0,0 +1,651 @@ +// Copyright 2023 litep2p developers +// +// Permission is hereby granted, free of charge, to any person obtaining a +// copy of this software and associated documentation files (the "Software"), +// to deal in the Software without restriction, including without limitation +// the rights to use, copy, modify, merge, publish, distribute, sublicense, +// and/or sell copies of the Software, and to permit persons to whom the +// Software is furnished to do so, subject to the following conditions: +// +// The above copyright notice and this permission notice shall be included in +// all copies or substantial portions of the Software. +// +// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS +// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE +// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER +// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING +// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER +// DEALINGS IN THE SOFTWARE. + +use crate::{ + codec::ProtocolCodec, + error::{Error, NegotiationError, SubstreamError}, + multistream_select::{ + NegotiationError as MultiStreamNegotiationError, ProtocolError as MultiStreamProtocolError, + }, + protocol::{ + connection::{ConnectionHandle, Permit}, + transport_service::SubstreamKeepAlive, + Direction, TransportEvent, + }, + substream::Substream, + transport::{ + manager::{ProtocolContext, TransportManagerEvent}, + Endpoint, + }, + types::{protocol::ProtocolName, ConnectionId, SubstreamId}, + PeerId, +}; + +use futures::{stream::FuturesUnordered, Stream, StreamExt}; +use multiaddr::Multiaddr; +use tokio::sync::mpsc::{channel, Receiver, Sender}; + +#[cfg(any(feature = "quic", feature = "webrtc", feature = "websocket"))] +use std::sync::atomic::Ordering; +use std::{ + collections::HashMap, + fmt::Debug, + pin::Pin, + sync::{atomic::AtomicUsize, Arc}, + task::{Context, Poll}, +}; + +/// Logging target for the file. +const LOG_TARGET: &str = "litep2p::protocol-set"; + +/// Events emitted by the underlying transport protocols. +#[derive(Debug)] +pub enum InnerTransportEvent { + /// Connection established to `peer`. + ConnectionEstablished { + /// Peer ID. + peer: PeerId, + + /// Connection ID. + connection: ConnectionId, + + /// Endpoint. + endpoint: Endpoint, + + /// Handle for communicating with the connection. + sender: ConnectionHandle, + }, + + /// Connection closed. + ConnectionClosed { + /// Peer ID. + peer: PeerId, + + /// Connection ID. + connection: ConnectionId, + }, + + /// Failed to dial peer. + /// + /// This is reported to that protocol which initiated the connection. + DialFailure { + /// Peer ID. + peer: PeerId, + + /// Dialed addresses. + addresses: Vec, + }, + + /// Substream opened for `peer`. + SubstreamOpened { + /// Peer ID. + peer: PeerId, + + /// Protocol name. + /// + /// One protocol handler may handle multiple sub-protocols (such as `/ipfs/identify/1.0.0` + /// and `/ipfs/identify/push/1.0.0`) or it may have aliases which should be handled by + /// the same protocol handler. When the substream is sent from transport to the protocol + /// handler, the protocol name that was used to negotiate the substream is also sent so + /// the protocol can handle the substream appropriately. + protocol: ProtocolName, + + /// Fallback name. + /// + /// If the substream was negotiated using a fallback name of the main protocol, + /// `fallback` is `Some`. + fallback: Option, + + /// Substream direction. + /// + /// Informs the protocol whether the substream is inbound (opened by the remote node) + /// or outbound (opened by the local node). This allows the protocol to distinguish + /// between the two types of substreams and execute correct code for the substream. + /// + /// Outbound substreams also contain the substream ID which allows the protocol to + /// distinguish between different outbound substreams. + direction: Direction, + + /// Connection ID. + connection_id: ConnectionId, + + /// Substream. + substream: Substream, + + /// Permit that was held while this substream was opening. Must be dropped by + /// [`TransportService`](crate::protocol::TransportService) once connection is upgraded. + opening_permit: Permit, + }, + + /// Failed to open substream. + /// + /// Substream open failures are reported only for outbound substreams. + SubstreamOpenFailure { + /// Substream ID. + substream: SubstreamId, + + /// Error that occurred when the substream was being opened. + error: SubstreamError, + }, +} + +impl From for TransportEvent { + fn from(event: InnerTransportEvent) -> Self { + match event { + InnerTransportEvent::DialFailure { peer, addresses } => + TransportEvent::DialFailure { peer, addresses }, + InnerTransportEvent::SubstreamOpened { + peer, + protocol, + fallback, + direction, + substream, + .. + } => TransportEvent::SubstreamOpened { + peer, + protocol, + fallback, + direction, + substream, + }, + InnerTransportEvent::SubstreamOpenFailure { substream, error } => + TransportEvent::SubstreamOpenFailure { substream, error }, + event => panic!("cannot convert {event:?}"), + } + } +} + +/// Events emitted by the installed protocols to transport. +#[derive(Debug, Clone)] +pub enum ProtocolCommand { + /// Open substream. + OpenSubstream { + /// Protocol name. + protocol: ProtocolName, + + /// Fallback names. + /// + /// If the protocol has changed its name but wishes to support the old name(s), it must + /// provide the old protocol names in `fallback_names`. These are fed into + /// `multistream-select` which them attempts to negotiate a protocol for the substream + /// using one of the provided names and if the substream is negotiated successfully, will + /// report back the actual protocol name that was negotiated, in case the protocol + /// needs to deal with the old version of the protocol in different way compared to + /// the new version. + fallback_names: Vec, + + /// Substream ID. + /// + /// Protocol allocates an ephemeral ID for outbound substreams which allows it to track + /// the state of its pending substream. The ID is given back to protocol in + /// [`TransportEvent::SubstreamOpened`]/[`TransportEvent::SubstreamOpenFailure`]. + /// + /// This allows the protocol to distinguish inbound substreams from outbound substreams + /// and associate incoming substreams with whatever logic it has. + substream_id: SubstreamId, + + /// Connection ID. + connection_id: ConnectionId, + + /// Connection permit. + /// + /// `Permit` allows the connection to be kept open while the permit is held and it is given + /// to the substream to hold once it has been opened. When the substream is dropped, the + /// permit is dropped and the connection may be closed if no other permit is being + /// held. + permit: Permit, + + /// Whether this susbtream should keep the connection alive until it exists. I.e., whether + /// it should store the permit above, or drop it once the substream is opened. + keep_alive: SubstreamKeepAlive, + }, + + /// Forcibly close the connection, even if other protocols have substreams open over it. + ForceClose, +} + +/// Supported protocol information. +/// +/// Each connection gets a copy of [`ProtocolSet`] which allows it to interact +/// directly with installed protocols. +pub struct ProtocolSet { + /// Installed protocols, indexed by main protocol name. + pub(crate) protocols: HashMap, + mgr_tx: Sender, + connection: ConnectionHandle, + rx: Receiver, + #[allow(unused)] + next_substream_id: Arc, + /// Mapping `fallback_name` -> `main_name`. + fallback_names: HashMap, + /// Connection keep-alive settings for both main & fallback protocol names. + keep_alives: HashMap, +} + +impl ProtocolSet { + pub fn new( + connection_id: ConnectionId, + mgr_tx: Sender, + next_substream_id: Arc, + protocols: HashMap, + ) -> Self { + let (tx, rx) = channel(256); + + let fallback_names = protocols + .iter() + .flat_map(|(protocol, context)| { + context + .fallback_names + .iter() + .map(|fallback| (fallback.clone(), protocol.clone())) + .collect::>() + }) + .collect::>(); + + let main_keep_alives = protocols + .iter() + .map(|(name, context)| (name.clone(), context.keep_alive)) + .collect::>(); + let fallback_keep_alives = fallback_names + .iter() + .map(|(fallback, main)| { + ( + fallback.clone(), + protocols + .get(main) + .expect("all main protocols are present due to construction above; qed") + .keep_alive, + ) + }) + .collect::>(); + let keep_alives = main_keep_alives.into_iter().chain(fallback_keep_alives).collect(); + + ProtocolSet { + rx, + mgr_tx, + protocols, + next_substream_id, + fallback_names, + keep_alives, + connection: ConnectionHandle::new(connection_id, tx), + } + } + + /// Try to acquire permit to keep the connection open. + pub fn try_get_permit(&mut self) -> Option { + self.connection.try_get_permit() + } + + /// Get next substream ID. + #[cfg(any(feature = "quic", feature = "webrtc", feature = "websocket"))] + pub fn next_substream_id(&self) -> SubstreamId { + SubstreamId::from(self.next_substream_id.fetch_add(1usize, Ordering::Relaxed)) + } + + /// Get the list of all supported protocols. + #[cfg(test)] + pub fn protocols(&self) -> Vec { + self.protocols + .keys() + .cloned() + .chain(self.fallback_names.keys().cloned()) + .collect() + } + + /// Get the list of all supported protocols with corresponding keep-alive settings. + pub fn protocols_with_keep_alives(&self) -> HashMap { + self.keep_alives.clone() + } + + /// Report to `protocol` that substream was opened for `peer`. + pub async fn report_substream_open( + &mut self, + peer: PeerId, + protocol: ProtocolName, + direction: Direction, + substream: Substream, + opening_permit: Permit, + ) -> Result<(), SubstreamError> { + tracing::debug!(target: LOG_TARGET, %protocol, ?peer, ?direction, "substream opened"); + + let (protocol, fallback) = match self.fallback_names.get(&protocol) { + Some(main_protocol) => (main_protocol.clone(), Some(protocol)), + None => (protocol, None), + }; + + let Some(protocol_context) = self.protocols.get(&protocol) else { + return Err(NegotiationError::MultistreamSelectError( + MultiStreamNegotiationError::ProtocolError( + MultiStreamProtocolError::ProtocolNotSupported, + ), + ) + .into()); + }; + + let event = InnerTransportEvent::SubstreamOpened { + peer, + protocol: protocol.clone(), + fallback, + direction, + substream, + connection_id: *self.connection.connection_id(), + opening_permit, + }; + + protocol_context + .tx + .send(event) + .await + .map_err(|_| SubstreamError::ConnectionClosed) + } + + /// Get codec used by the protocol. + pub fn protocol_codec(&self, protocol: &ProtocolName) -> ProtocolCodec { + // NOTE: `protocol` must exist in `self.protocol` as it was negotiated + // using the protocols from this set + self.protocols + .get(self.fallback_names.get(protocol).map_or(protocol, |protocol| protocol)) + .expect("protocol to exist") + .codec + } + + /// Report to `protocol` that connection failed to open substream for `peer`. + pub async fn report_substream_open_failure( + &mut self, + protocol: ProtocolName, + substream: SubstreamId, + error: SubstreamError, + ) -> crate::Result<()> { + tracing::debug!( + target: LOG_TARGET, + %protocol, + ?substream, + ?error, + "failed to open substream", + ); + + self.protocols + .get_mut(&protocol) + .ok_or(Error::ProtocolNotSupported(protocol.to_string()))? + .tx + .send(InnerTransportEvent::SubstreamOpenFailure { substream, error }) + .await + .map_err(From::from) + } + + /// Report to protocols that a connection was established. + pub(crate) async fn report_connection_established( + &mut self, + peer: PeerId, + endpoint: Endpoint, + ) -> crate::Result<()> { + let connection_handle = self.connection.downgrade(); + let mut futures = self + .protocols + .values() + .map(|sender| { + let endpoint = endpoint.clone(); + let connection_handle = connection_handle.clone(); + + async move { + sender + .tx + .send(InnerTransportEvent::ConnectionEstablished { + peer, + connection: endpoint.connection_id(), + endpoint, + sender: connection_handle, + }) + .await + } + }) + .collect::>(); + + while !futures.is_empty() { + if let Some(Err(error)) = futures.next().await { + return Err(error.into()); + } + } + + Ok(()) + } + + /// Report to protocols that a connection was closed. + pub(crate) async fn report_connection_closed( + &mut self, + peer: PeerId, + connection_id: ConnectionId, + ) -> crate::Result<()> { + let mut futures = self + .protocols + .iter() + .map(|(protocol, sender)| async move { + sender + .tx + .send(InnerTransportEvent::ConnectionClosed { + peer, + connection: connection_id, + }) + .await + .inspect_err(|err| { + tracing::debug!( + target: LOG_TARGET, + %protocol, + ?peer, + ?connection_id, + ?err, + "failed to report connection closed to protocol", + ); + }) + }) + .collect::>(); + + // Capture the first error that occurs while reporting to protocols. + let mut protocol_error = None; + while !futures.is_empty() { + if let Some(Err(err)) = futures.next().await { + if protocol_error.is_none() { + protocol_error = Some(err.into()); + } + } + } + + // Ensure the manager receives the connection closed event. Otherwise, the + // manager will think the connection is still open, while the underlying + // protocols and raw connection are closed. + self.mgr_tx + .send(TransportManagerEvent::ConnectionClosed { + peer, + connection: connection_id, + }) + .await?; + + // If any protocol report failed, return that error now + match protocol_error { + Some(e) => Err(e), + None => Ok(()), + } + } +} + +impl Stream for ProtocolSet { + type Item = ProtocolCommand; + + fn poll_next(mut self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll> { + self.rx.poll_recv(cx) + } +} + +#[cfg(test)] +mod tests { + use super::*; + use crate::mock::substream::MockSubstream; + use std::collections::HashSet; + + #[tokio::test] + async fn fallback_is_provided() { + let (tx, _rx) = channel(64); + let (tx1, _rx1) = channel(64); + + let mut protocol_set = ProtocolSet::new( + ConnectionId::from(0usize), + tx, + Default::default(), + HashMap::from_iter([( + ProtocolName::from("/notif/1"), + ProtocolContext { + tx: tx1, + codec: ProtocolCodec::Identity(32), + fallback_names: vec![ + ProtocolName::from("/notif/1/fallback/1"), + ProtocolName::from("/notif/1/fallback/2"), + ], + keep_alive: SubstreamKeepAlive::Yes, + }, + )]), + ); + + let expected_protocols = HashSet::from([ + ProtocolName::from("/notif/1"), + ProtocolName::from("/notif/1/fallback/1"), + ProtocolName::from("/notif/1/fallback/2"), + ]); + + for protocol in protocol_set.protocols().iter() { + assert!(expected_protocols.contains(protocol)); + } + + let permit = protocol_set.try_get_permit().unwrap(); + protocol_set + .report_substream_open( + PeerId::random(), + ProtocolName::from("/notif/1/fallback/2"), + Direction::Inbound, + Substream::new_mock( + PeerId::random(), + SubstreamId::from(0usize), + Box::new(MockSubstream::new()), + ), + permit, + ) + .await + .unwrap(); + } + + #[tokio::test] + async fn main_protocol_reported_if_main_protocol_negotiated() { + let (tx, _rx) = channel(64); + let (tx1, mut rx1) = channel(64); + + let mut protocol_set = ProtocolSet::new( + ConnectionId::from(0usize), + tx, + Default::default(), + HashMap::from_iter([( + ProtocolName::from("/notif/1"), + ProtocolContext { + tx: tx1, + codec: ProtocolCodec::Identity(32), + fallback_names: vec![ + ProtocolName::from("/notif/1/fallback/1"), + ProtocolName::from("/notif/1/fallback/2"), + ], + keep_alive: SubstreamKeepAlive::Yes, + }, + )]), + ); + + let permit = protocol_set.try_get_permit().unwrap(); + protocol_set + .report_substream_open( + PeerId::random(), + ProtocolName::from("/notif/1"), + Direction::Inbound, + Substream::new_mock( + PeerId::random(), + SubstreamId::from(0usize), + Box::new(MockSubstream::new()), + ), + permit, + ) + .await + .unwrap(); + + match rx1.recv().await.unwrap() { + InnerTransportEvent::SubstreamOpened { + protocol, fallback, .. + } => { + assert!(fallback.is_none()); + assert_eq!(protocol, ProtocolName::from("/notif/1")); + } + _ => panic!("invalid event received"), + } + } + + #[tokio::test] + async fn fallback_is_reported_to_protocol() { + let (tx, _rx) = channel(64); + let (tx1, mut rx1) = channel(64); + + let mut protocol_set = ProtocolSet::new( + ConnectionId::from(0usize), + tx, + Default::default(), + HashMap::from_iter([( + ProtocolName::from("/notif/1"), + ProtocolContext { + tx: tx1, + codec: ProtocolCodec::Identity(32), + fallback_names: vec![ + ProtocolName::from("/notif/1/fallback/1"), + ProtocolName::from("/notif/1/fallback/2"), + ], + keep_alive: SubstreamKeepAlive::Yes, + }, + )]), + ); + + let permit = protocol_set.try_get_permit().unwrap(); + protocol_set + .report_substream_open( + PeerId::random(), + ProtocolName::from("/notif/1/fallback/2"), + Direction::Inbound, + Substream::new_mock( + PeerId::random(), + SubstreamId::from(0usize), + Box::new(MockSubstream::new()), + ), + permit, + ) + .await + .unwrap(); + + match rx1.recv().await.unwrap() { + InnerTransportEvent::SubstreamOpened { + protocol, fallback, .. + } => { + assert_eq!(fallback, Some(ProtocolName::from("/notif/1/fallback/2"))); + assert_eq!(protocol, ProtocolName::from("/notif/1")); + } + _ => panic!("invalid event received"), + } + } +} diff --git a/client/litep2p/src/protocol/request_response/config.rs b/client/litep2p/src/protocol/request_response/config.rs new file mode 100644 index 00000000..a44b1238 --- /dev/null +++ b/client/litep2p/src/protocol/request_response/config.rs @@ -0,0 +1,171 @@ +// Copyright 2023 litep2p developers +// +// Permission is hereby granted, free of charge, to any person obtaining a +// copy of this software and associated documentation files (the "Software"), +// to deal in the Software without restriction, including without limitation +// the rights to use, copy, modify, merge, publish, distribute, sublicense, +// and/or sell copies of the Software, and to permit persons to whom the +// Software is furnished to do so, subject to the following conditions: +// +// The above copyright notice and this permission notice shall be included in +// all copies or substantial portions of the Software. +// +// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS +// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE +// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER +// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING +// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER +// DEALINGS IN THE SOFTWARE. + +use crate::{ + codec::ProtocolCodec, + protocol::request_response::{ + handle::{InnerRequestResponseEvent, RequestResponseCommand, RequestResponseHandle}, + REQUEST_TIMEOUT, + }, + types::protocol::ProtocolName, + DEFAULT_CHANNEL_SIZE, +}; + +use tokio::sync::mpsc::{channel, Receiver, Sender}; + +use std::{ + sync::{atomic::AtomicUsize, Arc}, + time::Duration, +}; + +/// Request-response protocol configuration. +pub struct Config { + /// Protocol name. + pub(crate) protocol_name: ProtocolName, + + /// Fallback names for the main protocol name. + pub(crate) fallback_names: Vec, + + /// Timeout for outbound requests. + pub(crate) timeout: Duration, + + /// Codec used by the protocol. + pub(crate) codec: ProtocolCodec, + + /// TX channel for sending events to the user protocol. + pub(super) event_tx: Sender, + + /// RX channel for receiving commands from the user protocol. + pub(crate) command_rx: Receiver, + + /// Next ephemeral request ID. + pub(crate) next_request_id: Arc, + + /// Maximum number of concurrent inbound requests. + pub(crate) max_concurrent_inbound_request: Option, +} + +impl Config { + /// Create new [`Config`]. + pub fn new( + protocol_name: ProtocolName, + fallback_names: Vec, + max_message_size: usize, + timeout: Duration, + max_concurrent_inbound_request: Option, + ) -> (Self, RequestResponseHandle) { + let (event_tx, event_rx) = channel(DEFAULT_CHANNEL_SIZE); + let (command_tx, command_rx) = channel(DEFAULT_CHANNEL_SIZE); + let next_request_id = Default::default(); + let handle = RequestResponseHandle::new(event_rx, command_tx, Arc::clone(&next_request_id)); + + ( + Self { + event_tx, + command_rx, + protocol_name, + fallback_names, + next_request_id, + timeout, + max_concurrent_inbound_request, + codec: ProtocolCodec::UnsignedVarint(Some(max_message_size)), + }, + handle, + ) + } + + /// Get protocol name. + pub(crate) fn protocol_name(&self) -> &ProtocolName { + &self.protocol_name + } +} + +/// Builder for [`Config`]. +pub struct ConfigBuilder { + /// Protocol name. + pub(crate) protocol_name: ProtocolName, + + /// Fallback names for the main protocol name. + pub(crate) fallback_names: Vec, + + /// Maximum message size. + max_message_size: Option, + + /// Timeout for outbound requests. + timeout: Option, + + /// Maximum number of concurrent inbound requests. + max_concurrent_inbound_request: Option, +} + +impl ConfigBuilder { + /// Create new [`ConfigBuilder`]. + pub fn new(protocol_name: ProtocolName) -> Self { + Self { + protocol_name, + fallback_names: Vec::new(), + max_message_size: None, + timeout: Some(REQUEST_TIMEOUT), + max_concurrent_inbound_request: None, + } + } + + /// Set maximum message size. + pub fn with_max_size(mut self, max_message_size: usize) -> Self { + self.max_message_size = Some(max_message_size); + self + } + + /// Set fallback names. + pub fn with_fallback_names(mut self, fallback_names: Vec) -> Self { + self.fallback_names = fallback_names; + self + } + + /// Set timeout for outbound requests. + pub fn with_timeout(mut self, timeout: Duration) -> Self { + self.timeout = Some(timeout); + self + } + + /// Specify the maximum number of concurrent inbound requests. By default the number of inbound + /// requests is not limited. + /// + /// If a new request is received while the number of inbound requests is already at a maximum, + /// the request is dropped. + pub fn with_max_concurrent_inbound_requests( + mut self, + max_concurrent_inbound_requests: usize, + ) -> Self { + self.max_concurrent_inbound_request = Some(max_concurrent_inbound_requests); + self + } + + /// Build [`Config`]. + pub fn build(mut self) -> (Config, RequestResponseHandle) { + Config::new( + self.protocol_name, + self.fallback_names, + self.max_message_size.take().expect("maximum message size to be set"), + self.timeout.take().expect("timeout to exist"), + self.max_concurrent_inbound_request, + ) + } +} diff --git a/client/litep2p/src/protocol/request_response/handle.rs b/client/litep2p/src/protocol/request_response/handle.rs new file mode 100644 index 00000000..5f1cc162 --- /dev/null +++ b/client/litep2p/src/protocol/request_response/handle.rs @@ -0,0 +1,570 @@ +// Copyright 2023 litep2p developers +// +// Permission is hereby granted, free of charge, to any person obtaining a +// copy of this software and associated documentation files (the "Software"), +// to deal in the Software without restriction, including without limitation +// the rights to use, copy, modify, merge, publish, distribute, sublicense, +// and/or sell copies of the Software, and to permit persons to whom the +// Software is furnished to do so, subject to the following conditions: +// +// The above copyright notice and this permission notice shall be included in +// all copies or substantial portions of the Software. +// +// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS +// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE +// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER +// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING +// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER +// DEALINGS IN THE SOFTWARE. + +use crate::{ + error::{ImmediateDialError, SubstreamError}, + multistream_select::ProtocolError, + types::{protocol::ProtocolName, RequestId}, + Error, PeerId, +}; + +use futures::channel; +use tokio::sync::{ + mpsc::{Receiver, Sender}, + oneshot, +}; + +use std::{ + collections::HashMap, + io::ErrorKind, + pin::Pin, + sync::{ + atomic::{AtomicUsize, Ordering}, + Arc, + }, + task::{Context, Poll}, +}; + +/// Logging target for the file. +const LOG_TARGET: &str = "litep2p::request-response::handle"; + +/// Request-response error. +#[derive(Debug, PartialEq)] +pub enum RequestResponseError { + /// Request was rejected. + Rejected(RejectReason), + + /// Request was canceled by the local node. + Canceled, + + /// Request timed out. + Timeout, + + /// The peer is not connected and the dialing option was [`DialOptions::Reject`]. + NotConnected, + + /// Too large payload. + TooLargePayload, + + /// Protocol not supported. + UnsupportedProtocol, +} + +/// The reason why a request was rejected. +#[derive(Debug, PartialEq)] +pub enum RejectReason { + /// Substream error. + SubstreamOpenError(SubstreamError), + + /// The peer disconnected before the request was processed. + ConnectionClosed, + + /// The substream was closed before the request was processed. + SubstreamClosed, + + /// The dial failed. + /// + /// If the dial failure is immediate, the error is included. + /// + /// If the dialing process is happening in parallel on multiple + /// addresses (potentially with multiple protocols), the dialing + /// process is not considered immediate and the given errors are not + /// propagated for simplicity. + DialFailed(Option), +} + +impl From for RejectReason { + fn from(error: SubstreamError) -> Self { + // Convert `ErrorKind::NotConnected` to `RejectReason::ConnectionClosed`. + match error { + SubstreamError::IoError(ErrorKind::NotConnected) => RejectReason::ConnectionClosed, + SubstreamError::YamuxError(crate::yamux::ConnectionError::Io(error), _) + if error.kind() == ErrorKind::NotConnected => + RejectReason::ConnectionClosed, + SubstreamError::NegotiationError(crate::error::NegotiationError::IoError( + ErrorKind::NotConnected, + )) => RejectReason::ConnectionClosed, + SubstreamError::NegotiationError( + crate::error::NegotiationError::MultistreamSelectError( + crate::multistream_select::NegotiationError::ProtocolError( + ProtocolError::IoError(error), + ), + ), + ) if error.kind() == ErrorKind::NotConnected => RejectReason::ConnectionClosed, + error => RejectReason::SubstreamOpenError(error), + } + } +} + +/// Request-response events. +#[derive(Debug)] +pub(super) enum InnerRequestResponseEvent { + /// Request received from remote + RequestReceived { + /// Peer Id. + peer: PeerId, + + /// Fallback protocol, if the substream was negotiated using a fallback. + fallback: Option, + + /// Request ID. + request_id: RequestId, + + /// Received request. + request: Vec, + + /// `oneshot::Sender` for response. + response_tx: oneshot::Sender<(Vec, Option>)>, + }, + + /// Response received. + ResponseReceived { + /// Peer Id. + peer: PeerId, + + /// Fallback protocol, if the substream was negotiated using a fallback. + fallback: Option, + + /// Request ID. + request_id: RequestId, + + /// Received request. + response: Vec, + }, + + /// Request failed. + RequestFailed { + /// Peer Id. + peer: PeerId, + + /// Request ID. + request_id: RequestId, + + /// Request-response error. + error: RequestResponseError, + }, +} + +impl From for RequestResponseEvent { + fn from(event: InnerRequestResponseEvent) -> Self { + match event { + InnerRequestResponseEvent::ResponseReceived { + peer, + request_id, + response, + fallback, + } => RequestResponseEvent::ResponseReceived { + peer, + request_id, + response, + fallback, + }, + InnerRequestResponseEvent::RequestFailed { + peer, + request_id, + error, + } => RequestResponseEvent::RequestFailed { + peer, + request_id, + error, + }, + _ => panic!("unhandled event"), + } + } +} + +/// Request-response events. +#[derive(Debug, PartialEq)] +pub enum RequestResponseEvent { + /// Request received from remote + RequestReceived { + /// Peer Id. + peer: PeerId, + + /// Fallback protocol, if the substream was negotiated using a fallback. + fallback: Option, + + /// Request ID. + /// + /// While `request_id` is guaranteed to be unique for this protocols, the request IDs are + /// not unique across different request-response protocols, meaning two different + /// request-response protocols can both assign `RequestId(123)` for any given request. + request_id: RequestId, + + /// Received request. + request: Vec, + }, + + /// Response received. + ResponseReceived { + /// Peer Id. + peer: PeerId, + + /// Request ID. + request_id: RequestId, + + /// Fallback protocol, if the substream was negotiated using a fallback. + fallback: Option, + + /// Received request. + response: Vec, + }, + + /// Request failed. + RequestFailed { + /// Peer Id. + peer: PeerId, + + /// Request ID. + request_id: RequestId, + + /// Request-response error. + error: RequestResponseError, + }, +} + +/// Dial behavior when sending requests. +#[derive(Debug)] +#[cfg_attr(feature = "fuzz", derive(serde::Serialize, serde::Deserialize))] +pub enum DialOptions { + /// If the peer is not currently connected, attempt to dial them before sending a request. + /// + /// If the dial succeeds, the request is sent to the peer once the peer has been registered + /// to the protocol. + /// + /// If the dial fails, [`RequestResponseError::Rejected`] is returned. + Dial, + + /// If the peer is not connected, immediately reject the request and return + /// [`RequestResponseError::NotConnected`]. + Reject, +} + +/// Request-response commands. +#[derive(Debug)] +#[cfg_attr(feature = "fuzz", derive(serde::Serialize, serde::Deserialize))] +pub enum RequestResponseCommand { + /// Send request to remote peer. + SendRequest { + /// Peer ID. + peer: PeerId, + + /// Request ID. + /// + /// When a response is received or the request fails, the event contains this ID that + /// the user protocol can associate with the correct request. + /// + /// If the user protocol only has one active request per peer, this ID can be safely + /// discarded. + request_id: RequestId, + + /// Request. + request: Vec, + + /// Dial options, see [`DialOptions`] for more details. + dial_options: DialOptions, + }, + + SendRequestWithFallback { + /// Peer ID. + peer: PeerId, + + /// Request ID. + request_id: RequestId, + + /// Request that is sent over the main protocol, if negotiated. + request: Vec, + + /// Request that is sent over the fallback protocol, if negotiated. + fallback: (ProtocolName, Vec), + + /// Dial options, see [`DialOptions`] for more details. + dial_options: DialOptions, + }, + + /// Cancel outbound request. + CancelRequest { + /// Request ID. + request_id: RequestId, + }, +} + +/// Handle given to the user protocol which allows it to interact with the request-response +/// protocol. +pub struct RequestResponseHandle { + /// TX channel for sending commands to the request-response protocol. + event_rx: Receiver, + + /// RX channel for receiving events from the request-response protocol. + command_tx: Sender, + + /// Pending responses. + pending_responses: + HashMap, Option>)>>, + + /// Next ephemeral request ID. + next_request_id: Arc, +} + +impl RequestResponseHandle { + /// Create new [`RequestResponseHandle`]. + pub(super) fn new( + event_rx: Receiver, + command_tx: Sender, + next_request_id: Arc, + ) -> Self { + Self { + event_rx, + command_tx, + next_request_id, + pending_responses: HashMap::new(), + } + } + + #[cfg(feature = "fuzz")] + /// Expose functionality for fuzzing + pub async fn fuzz_send_message( + &mut self, + command: RequestResponseCommand, + ) -> crate::Result { + let request_id = self.next_request_id(); + self.command_tx.send(command).await.map(|_| request_id).map_err(From::from) + } + + /// Reject an inbound request. + /// + /// Reject request received from a remote peer. The substream is dropped which signals + /// to the remote peer that request was rejected. + pub fn reject_request(&mut self, request_id: RequestId) { + match self.pending_responses.remove(&request_id) { + None => { + tracing::debug!(target: LOG_TARGET, ?request_id, "rejected request doesn't exist") + } + Some(sender) => { + tracing::debug!(target: LOG_TARGET, ?request_id, "reject request"); + drop(sender); + } + } + } + + /// Cancel an outbound request. + /// + /// Allows canceling an in-flight request if the local node is not interested in the answer + /// anymore. If the request was canceled, no event is reported to the user as the cancelation + /// always succeeds and it's assumed that the user does the necessary state clean up in their + /// end after calling [`RequestResponseHandle::cancel_request()`]. + pub async fn cancel_request(&mut self, request_id: RequestId) { + tracing::trace!(target: LOG_TARGET, ?request_id, "cancel request"); + + let _ = self.command_tx.send(RequestResponseCommand::CancelRequest { request_id }).await; + } + + /// Get next request ID. + fn next_request_id(&self) -> RequestId { + let request_id = self.next_request_id.fetch_add(1usize, Ordering::Relaxed); + RequestId::from(request_id) + } + + /// Send request to remote peer. + /// + /// While the returned `RequestId` is guaranteed to be unique for this request-response + /// protocol, it's not unique across all installed request-response protocols. That is, + /// multiple request-response protocols can return the same `RequestId` and this must be + /// handled by the calling code correctly if the `RequestId`s are stored somewhere. + pub async fn send_request( + &mut self, + peer: PeerId, + request: Vec, + dial_options: DialOptions, + ) -> crate::Result { + tracing::trace!(target: LOG_TARGET, ?peer, "send request to peer"); + + let request_id = self.next_request_id(); + self.command_tx + .send(RequestResponseCommand::SendRequest { + peer, + request_id, + request, + dial_options, + }) + .await + .map(|_| request_id) + .map_err(From::from) + } + + /// Attempt to send request to peer and if the channel is clogged, return + /// `Error::ChannelClogged`. + /// + /// While the returned `RequestId` is guaranteed to be unique for this request-response + /// protocol, it's not unique across all installed request-response protocols. That is, + /// multiple request-response protocols can return the same `RequestId` and this must be + /// handled by the calling code correctly if the `RequestId`s are stored somewhere. + pub fn try_send_request( + &mut self, + peer: PeerId, + request: Vec, + dial_options: DialOptions, + ) -> crate::Result { + tracing::trace!(target: LOG_TARGET, ?peer, "send request to peer"); + + let request_id = self.next_request_id(); + self.command_tx + .try_send(RequestResponseCommand::SendRequest { + peer, + request_id, + request, + dial_options, + }) + .map(|_| request_id) + .map_err(|_| Error::ChannelClogged) + } + + /// Send request to remote peer with fallback. + pub async fn send_request_with_fallback( + &mut self, + peer: PeerId, + request: Vec, + fallback: (ProtocolName, Vec), + dial_options: DialOptions, + ) -> crate::Result { + tracing::trace!( + target: LOG_TARGET, + ?peer, + fallback = %fallback.0, + ?dial_options, + "send request with fallback to peer", + ); + + let request_id = self.next_request_id(); + self.command_tx + .send(RequestResponseCommand::SendRequestWithFallback { + peer, + request_id, + fallback, + request, + dial_options, + }) + .await + .map(|_| request_id) + .map_err(From::from) + } + + /// Attempt to send request to peer with fallback and if the channel is clogged, + /// return `Error::ChannelClogged`. + pub fn try_send_request_with_fallback( + &mut self, + peer: PeerId, + request: Vec, + fallback: (ProtocolName, Vec), + dial_options: DialOptions, + ) -> crate::Result { + tracing::trace!( + target: LOG_TARGET, + ?peer, + fallback = %fallback.0, + ?dial_options, + "send request with fallback to peer", + ); + + let request_id = self.next_request_id(); + self.command_tx + .try_send(RequestResponseCommand::SendRequestWithFallback { + peer, + request_id, + fallback, + request, + dial_options, + }) + .map(|_| request_id) + .map_err(|_| Error::ChannelClogged) + } + + /// Send response to remote peer. + pub fn send_response(&mut self, request_id: RequestId, response: Vec) { + match self.pending_responses.remove(&request_id) { + None => { + tracing::debug!(target: LOG_TARGET, ?request_id, "pending response doens't exist"); + } + Some(response_tx) => { + tracing::trace!(target: LOG_TARGET, ?request_id, "send response to peer"); + + if let Err(_) = response_tx.send((response, None)) { + tracing::debug!(target: LOG_TARGET, ?request_id, "substream closed"); + } + } + } + } + + /// Send response to remote peer with feedback. + /// + /// The feedback system is inherited from Polkadot SDK's `sc-network` and it's used to notify + /// the sender of the response whether it was sent successfully or not. Once the response has + /// been sent over the substream successfully, `()` will be sent over the feedback channel + /// to the sender to notify them about it. If the substream has been closed or the substream + /// failed while sending the response, the feedback channel will be dropped, notifying the + /// sender that sending the response failed. + pub fn send_response_with_feedback( + &mut self, + request_id: RequestId, + response: Vec, + feedback: channel::oneshot::Sender<()>, + ) { + match self.pending_responses.remove(&request_id) { + None => { + tracing::debug!(target: LOG_TARGET, ?request_id, "pending response doens't exist"); + } + Some(response_tx) => { + tracing::trace!(target: LOG_TARGET, ?request_id, "send response to peer"); + + if let Err(_) = response_tx.send((response, Some(feedback))) { + tracing::debug!(target: LOG_TARGET, ?request_id, "substream closed"); + } + } + } + } +} + +impl futures::Stream for RequestResponseHandle { + type Item = RequestResponseEvent; + + fn poll_next(mut self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll> { + match futures::ready!(self.event_rx.poll_recv(cx)) { + None => Poll::Ready(None), + Some(event) => match event { + InnerRequestResponseEvent::RequestReceived { + peer, + fallback, + request_id, + request, + response_tx, + } => { + self.pending_responses.insert(request_id, response_tx); + Poll::Ready(Some(RequestResponseEvent::RequestReceived { + peer, + fallback, + request_id, + request, + })) + } + event => Poll::Ready(Some(event.into())), + }, + } + } +} diff --git a/client/litep2p/src/protocol/request_response/mod.rs b/client/litep2p/src/protocol/request_response/mod.rs new file mode 100644 index 00000000..d763fa64 --- /dev/null +++ b/client/litep2p/src/protocol/request_response/mod.rs @@ -0,0 +1,1083 @@ +// Copyright 2023 litep2p developers +// +// Permission is hereby granted, free of charge, to any person obtaining a +// copy of this software and associated documentation files (the "Software"), +// to deal in the Software without restriction, including without limitation +// the rights to use, copy, modify, merge, publish, distribute, sublicense, +// and/or sell copies of the Software, and to permit persons to whom the +// Software is furnished to do so, subject to the following conditions: +// +// The above copyright notice and this permission notice shall be included in +// all copies or substantial portions of the Software. +// +// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS +// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE +// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER +// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING +// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER +// DEALINGS IN THE SOFTWARE. + +//! Request-response protocol implementation. + +use crate::{ + error::{Error, NegotiationError, SubstreamError}, + multistream_select::NegotiationError::Failed as MultistreamFailed, + protocol::{ + request_response::handle::InnerRequestResponseEvent, Direction, TransportEvent, + TransportService, + }, + substream::Substream, + types::{protocol::ProtocolName, RequestId, SubstreamId}, + utils::futures_stream::FuturesStream, + PeerId, +}; + +use bytes::BytesMut; +use futures::{channel, future::BoxFuture, stream::FuturesUnordered, StreamExt}; +use tokio::{ + sync::{ + mpsc::{Receiver, Sender}, + oneshot, + }, + time::sleep, +}; + +use std::{ + collections::{hash_map::Entry, HashMap, HashSet}, + io::ErrorKind, + sync::{ + atomic::{AtomicUsize, Ordering}, + Arc, + }, + time::Duration, +}; + +pub use config::{Config, ConfigBuilder}; +pub use handle::{ + DialOptions, RejectReason, RequestResponseCommand, RequestResponseError, RequestResponseEvent, + RequestResponseHandle, +}; + +mod config; +mod handle; +#[cfg(test)] +mod tests; + +/// Logging target for the file. +const LOG_TARGET: &str = "litep2p::request-response::protocol"; + +/// Default request timeout. +const REQUEST_TIMEOUT: Duration = Duration::from_secs(5); + +/// Pending request. +type PendingRequest = ( + PeerId, + RequestId, + Option, + Result, RequestResponseError>, +); + +/// Request context. +struct RequestContext { + /// Peer ID. + peer: PeerId, + + /// Request ID. + request_id: RequestId, + + /// Request. + request: Vec, + + /// Fallback request. + fallback: Option<(ProtocolName, Vec)>, +} + +impl RequestContext { + /// Create new [`RequestContext`]. + fn new( + peer: PeerId, + request_id: RequestId, + request: Vec, + fallback: Option<(ProtocolName, Vec)>, + ) -> Self { + Self { + peer, + request_id, + request, + fallback, + } + } +} + +/// Peer context. +struct PeerContext { + /// Active requests. + active: HashSet, + + /// Active inbound requests and their fallback names. + active_inbound: HashMap>, +} + +impl PeerContext { + /// Create new [`PeerContext`]. + fn new() -> Self { + Self { + active: HashSet::new(), + active_inbound: HashMap::new(), + } + } +} + +/// Request-response protocol. +pub(crate) struct RequestResponseProtocol { + /// Transport service. + service: TransportService, + + /// Protocol. + protocol: ProtocolName, + + /// Connected peers. + peers: HashMap, + + /// Pending outbound substreams, mapped from `SubstreamId` to `RequestId`. + pending_outbound: HashMap, + + /// Pending outbound responses. + /// + /// The future listens to a `oneshot::Sender` which is given to `RequestResponseHandle`. + /// If the request is accepted by the local node, the response is sent over the channel to the + /// the future which sends it to remote peer and closes the substream. + /// + /// If the substream is rejected by the local node, the `oneshot::Sender` is dropped which + /// notifies the future that the request should be rejected by closing the substream. + pending_outbound_responses: FuturesUnordered>, + + /// Pending outbound cancellation handles. + pending_outbound_cancels: HashMap>, + + /// Pending inbound responses. + pending_inbound: FuturesUnordered>, + + /// Pending inbound requests. + pending_inbound_requests: FuturesStream< + BoxFuture< + 'static, + ( + PeerId, + RequestId, + Result, + Substream, + ), + >, + >, + + /// Pending dials for outbound requests. + pending_dials: HashMap, + + /// TX channel for sending events to the user protocol. + event_tx: Sender, + + /// RX channel for receive commands from the `RequestResponseHandle`. + command_rx: Receiver, + + /// Next request ID. + next_request_id: Arc, + + /// Timeout for outbound requests. + timeout: Duration, + + /// Maximum concurrent inbound requests, if specified. + max_concurrent_inbound_requests: Option, +} + +impl RequestResponseProtocol { + /// Create new [`RequestResponseProtocol`]. + pub(crate) fn new(service: TransportService, config: Config) -> Self { + Self { + service, + peers: HashMap::new(), + timeout: config.timeout, + next_request_id: config.next_request_id, + event_tx: config.event_tx, + command_rx: config.command_rx, + protocol: config.protocol_name, + pending_dials: HashMap::new(), + pending_outbound: HashMap::new(), + pending_inbound: FuturesUnordered::new(), + pending_outbound_cancels: HashMap::new(), + pending_inbound_requests: FuturesStream::new(), + pending_outbound_responses: FuturesUnordered::new(), + max_concurrent_inbound_requests: config.max_concurrent_inbound_request, + } + } + + /// Get next ephemeral request ID. + fn next_request_id(&mut self) -> RequestId { + RequestId::from(self.next_request_id.fetch_add(1usize, Ordering::Relaxed)) + } + + /// Connection established to remote peer. + async fn on_connection_established(&mut self, peer: PeerId) -> crate::Result<()> { + tracing::debug!(target: LOG_TARGET, ?peer, protocol = %self.protocol, "connection established"); + + let Entry::Vacant(entry) = self.peers.entry(peer) else { + tracing::error!( + target: LOG_TARGET, + ?peer, + "state mismatch: peer already exists", + ); + debug_assert!(false); + return Err(Error::PeerAlreadyExists(peer)); + }; + + match self.pending_dials.remove(&peer) { + None => { + tracing::debug!( + target: LOG_TARGET, + ?peer, + protocol = %self.protocol, + "peer connected without pending dial", + ); + entry.insert(PeerContext::new()); + } + Some(context) => match self.service.open_substream(peer) { + Ok(substream_id) => { + tracing::trace!( + target: LOG_TARGET, + ?peer, + protocol = %self.protocol, + request_id = ?context.request_id, + ?substream_id, + "dial succeeded, open substream", + ); + + entry.insert(PeerContext { + active: HashSet::from_iter([context.request_id]), + active_inbound: HashMap::new(), + }); + self.pending_outbound.insert( + substream_id, + RequestContext::new( + peer, + context.request_id, + context.request, + context.fallback, + ), + ); + } + // only reason the substream would fail to open would be that the connection + // would've been reported to the protocol with enough delay that the keep-alive + // timeout had expired and no other protocol had opened a substream to it, causing + // the connection to be closed + Err(error) => { + tracing::warn!( + target: LOG_TARGET, + ?peer, + protocol = %self.protocol, + request_id = ?context.request_id, + ?error, + "failed to open substream", + ); + + return self + .report_request_failure( + peer, + context.request_id, + RequestResponseError::Rejected(error.into()), + ) + .await; + } + }, + } + + Ok(()) + } + + /// Connection closed to remote peer. + async fn on_connection_closed(&mut self, peer: PeerId) { + tracing::debug!(target: LOG_TARGET, ?peer, protocol = %self.protocol, "connection closed"); + + // Remove any pending outbound substreams for this peer. + self.pending_outbound.retain(|_, context| context.peer != peer); + + let Some(context) = self.peers.remove(&peer) else { + tracing::error!( + target: LOG_TARGET, + ?peer, + "Peer does not exist or substream open failed during connection establishment", + ); + return; + }; + + // sent failure events for all pending outbound requests + for request_id in context.active { + let _ = self + .event_tx + .send(InnerRequestResponseEvent::RequestFailed { + peer, + request_id, + error: RequestResponseError::Rejected(RejectReason::ConnectionClosed), + }) + .await; + } + } + + /// Local node opened a substream to remote node. + async fn on_outbound_substream( + &mut self, + peer: PeerId, + substream_id: SubstreamId, + mut substream: Substream, + fallback_protocol: Option, + ) -> crate::Result<()> { + let Some(RequestContext { + request_id, + request, + fallback, + .. + }) = self.pending_outbound.remove(&substream_id) + else { + tracing::error!( + target: LOG_TARGET, + ?peer, + protocol = %self.protocol, + ?substream_id, + "pending outbound request does not exist", + ); + debug_assert!(false); + + return Err(Error::InvalidState); + }; + + tracing::trace!( + target: LOG_TARGET, + ?peer, + protocol = %self.protocol, + ?substream_id, + ?request_id, + "substream opened, send request", + ); + + let request = match (&fallback_protocol, fallback) { + (Some(protocol), Some((fallback_protocol, fallback_request))) + if protocol == &fallback_protocol => + fallback_request, + _ => request, + }; + + let request_timeout = self.timeout; + let protocol = self.protocol.clone(); + let (tx, rx) = oneshot::channel(); + self.pending_outbound_cancels.insert(request_id, tx); + + self.pending_inbound.push(Box::pin(async move { + match tokio::time::timeout(request_timeout, substream.send_framed(request.into())).await + { + Err(_) => ( + peer, + request_id, + fallback_protocol, + Err(RequestResponseError::Timeout), + ), + Ok(Err(SubstreamError::IoError(ErrorKind::PermissionDenied))) => { + tracing::warn!( + target: LOG_TARGET, + ?peer, + %protocol, + "tried to send too large request", + ); + + ( + peer, + request_id, + fallback_protocol, + Err(RequestResponseError::TooLargePayload), + ) + } + Ok(Err(error)) => ( + peer, + request_id, + fallback_protocol, + Err(RequestResponseError::Rejected(error.into())), + ), + Ok(Ok(_)) => { + tokio::select! { + _ = rx => { + tracing::debug!( + target: LOG_TARGET, + ?peer, + %protocol, + ?request_id, + "request canceled", + ); + + let _ = substream.close().await; + ( + peer, + request_id, + fallback_protocol, + Err(RequestResponseError::Canceled)) + } + _ = sleep(request_timeout) => { + tracing::debug!( + target: LOG_TARGET, + ?peer, + %protocol, + ?request_id, + "request timed out", + ); + + let _ = substream.close().await; + (peer, request_id, fallback_protocol, Err(RequestResponseError::Timeout)) + } + event = substream.next() => match event { + Some(Ok(response)) => { + (peer, request_id, fallback_protocol, Ok(response.freeze().into())) + }, + Some(Err(error)) => { + (peer, request_id, fallback_protocol, Err(RequestResponseError::Rejected(error.into()))) + }, + None => { + tracing::debug!( + target: LOG_TARGET, + ?peer, + %protocol, + ?request_id, + "substream closed", + ); + (peer, request_id, fallback_protocol, Err(RequestResponseError::Rejected(RejectReason::SubstreamClosed))) + } + } + } + } + } + })); + + Ok(()) + } + + /// Handle pending inbound response. + async fn on_inbound_request( + &mut self, + peer: PeerId, + request_id: RequestId, + request: Result, + mut substream: Substream, + ) -> crate::Result<()> { + // The peer will no longer exist if the connection was closed before processing the request. + let peer_context = self.peers.get_mut(&peer).ok_or(Error::PeerDoesntExist(peer))?; + let fallback = peer_context.active_inbound.remove(&request_id).ok_or_else(|| { + tracing::debug!( + target: LOG_TARGET, + ?peer, + protocol = %self.protocol, + ?request_id, + "no active inbound request", + ); + + Error::InvalidState + })?; + + let protocol = self.protocol.clone(); + + tracing::trace!( + target: LOG_TARGET, + ?peer, + %protocol, + ?request_id, + "inbound request", + ); + + let Ok(request) = request else { + tracing::debug!( + target: LOG_TARGET, + ?peer, + %protocol, + ?request_id, + ?request, + "failed to read request from substream", + ); + return Err(Error::InvalidData); + }; + + // once the request has been read from the substream, start a future which waits + // for an input from the user. + // + // the input is either a response (succes) or rejection (failure) which is communicated + // by sending the response over the `oneshot::Sender` or closing it, respectively. + let timeout = self.timeout; + let (response_tx, rx): ( + oneshot::Sender<(Vec, Option>)>, + _, + ) = oneshot::channel(); + + self.pending_outbound_responses.push(Box::pin(async move { + match rx.await { + Err(_) => { + tracing::debug!( + target: LOG_TARGET, + ?peer, + %protocol, + ?request_id, + "request rejected", + ); + let _ = substream.close().await; + } + Ok((response, mut feedback)) => { + tracing::trace!( + target: LOG_TARGET, + ?peer, + %protocol, + ?request_id, + "send response", + ); + + match tokio::time::timeout(timeout, substream.send_framed(response.into())) + .await + { + Err(_) => tracing::debug!( + target: LOG_TARGET, + ?peer, + %protocol, + ?request_id, + "timed out while sending response", + ), + Ok(Ok(_)) => feedback.take().map_or((), |feedback| { + let _ = feedback.send(()); + }), + Ok(Err(error)) => tracing::trace!( + target: LOG_TARGET, + ?peer, + %protocol, + ?request_id, + ?error, + "failed to send request to peer", + ), + } + } + } + })); + + self.event_tx + .send(InnerRequestResponseEvent::RequestReceived { + peer, + fallback, + request_id, + request: request.freeze().into(), + response_tx, + }) + .await + .map_err(From::from) + } + + /// Remote opened a substream to local node. + async fn on_inbound_substream( + &mut self, + peer: PeerId, + fallback: Option, + mut substream: Substream, + ) -> crate::Result<()> { + tracing::trace!(target: LOG_TARGET, ?peer, protocol = %self.protocol, "handle inbound substream"); + + if let Some(max_requests) = self.max_concurrent_inbound_requests { + let num_inbound_requests = + self.pending_inbound_requests.len() + self.pending_outbound_responses.len(); + + if max_requests <= num_inbound_requests { + tracing::debug!( + target: LOG_TARGET, + ?peer, + protocol = %self.protocol, + ?fallback, + ?max_requests, + "rejecting request as already at maximum", + ); + + let _ = substream.close().await; + return Ok(()); + } + } + + // allocate ephemeral id for the inbound request and return it to the user protocol + // + // when user responds to the request, this is used to associate the response with the + // correct substream. + let request_id = self.next_request_id(); + self.peers + .get_mut(&peer) + .ok_or(Error::PeerDoesntExist(peer))? + .active_inbound + .insert(request_id, fallback); + + self.pending_inbound_requests.push(Box::pin(async move { + let request = match substream.next().await { + Some(Ok(request)) => Ok(request), + Some(Err(error)) => Err(error), + None => Err(SubstreamError::ConnectionClosed), + }; + + (peer, request_id, request, substream) + })); + + Ok(()) + } + + async fn on_dial_failure(&mut self, peer: PeerId) { + if let Some(context) = self.pending_dials.remove(&peer) { + tracing::debug!(target: LOG_TARGET, ?peer, protocol = %self.protocol, "failed to dial peer"); + + let _ = self + .peers + .get_mut(&peer) + .map(|peer_context| peer_context.active.remove(&context.request_id)); + let _ = self + .report_request_failure( + peer, + context.request_id, + RequestResponseError::Rejected(RejectReason::DialFailed(None)), + ) + .await; + } + } + + /// Failed to open substream to remote peer. + async fn on_substream_open_failure( + &mut self, + substream: SubstreamId, + error: SubstreamError, + ) -> crate::Result<()> { + let Some(RequestContext { + request_id, peer, .. + }) = self.pending_outbound.remove(&substream) + else { + tracing::error!( + target: LOG_TARGET, + protocol = %self.protocol, + ?substream, + "pending outbound request does not exist", + ); + debug_assert!(false); + + return Err(Error::InvalidState); + }; + + tracing::debug!( + target: LOG_TARGET, + ?peer, + protocol = %self.protocol, + ?request_id, + ?substream, + ?error, + "failed to open substream", + ); + + let _ = self + .peers + .get_mut(&peer) + .map(|peer_context| peer_context.active.remove(&request_id)); + + self.event_tx + .send(InnerRequestResponseEvent::RequestFailed { + peer, + request_id, + error: match error { + SubstreamError::NegotiationError(NegotiationError::MultistreamSelectError( + MultistreamFailed, + )) => RequestResponseError::UnsupportedProtocol, + _ => RequestResponseError::Rejected(error.into()), + }, + }) + .await + .map_err(From::from) + } + + /// Report request send failure to user. + async fn report_request_failure( + &mut self, + peer: PeerId, + request_id: RequestId, + error: RequestResponseError, + ) -> crate::Result<()> { + self.event_tx + .send(InnerRequestResponseEvent::RequestFailed { + peer, + request_id, + error, + }) + .await + .map_err(From::from) + } + + /// Send request to remote peer. + fn on_send_request( + &mut self, + peer: PeerId, + request_id: RequestId, + request: Vec, + dial_options: DialOptions, + fallback: Option<(ProtocolName, Vec)>, + ) -> Result<(), RequestResponseError> { + tracing::trace!( + target: LOG_TARGET, + ?peer, + protocol = %self.protocol, + ?request_id, + ?dial_options, + "send request to remote peer", + ); + + let Some(context) = self.peers.get_mut(&peer) else { + match dial_options { + DialOptions::Reject => { + tracing::debug!( + target: LOG_TARGET, + ?peer, + protocol = %self.protocol, + ?request_id, + ?dial_options, + "peer not connected and should not dial", + ); + + return Err(RequestResponseError::NotConnected); + } + DialOptions::Dial => match self.service.dial(&peer) { + Ok(_) => { + tracing::trace!( + target: LOG_TARGET, + ?peer, + protocol = %self.protocol, + ?request_id, + "started dialing peer", + ); + + self.pending_dials.insert( + peer, + RequestContext::new(peer, request_id, request, fallback), + ); + return Ok(()); + } + Err(error) => { + tracing::debug!( + target: LOG_TARGET, + ?peer, + protocol = %self.protocol, + ?error, + "failed to dial peer" + ); + + return Err(RequestResponseError::Rejected(RejectReason::DialFailed( + Some(error), + ))); + } + }, + } + }; + + // open substream and push it pending outbound substreams + // once the substream is opened, send the request. + match self.service.open_substream(peer) { + Ok(substream_id) => { + let unique_request_id = context.active.insert(request_id); + debug_assert!(unique_request_id); + + self.pending_outbound.insert( + substream_id, + RequestContext::new(peer, request_id, request, fallback), + ); + + Ok(()) + } + Err(error) => { + tracing::debug!( + target: LOG_TARGET, + ?peer, + protocol = %self.protocol, + ?request_id, + ?error, + "failed to open substream", + ); + + Err(RequestResponseError::Rejected(error.into())) + } + } + } + + /// Handle substream event. + async fn on_substream_event( + &mut self, + peer: PeerId, + request_id: RequestId, + fallback: Option, + message: Result, RequestResponseError>, + ) -> crate::Result<()> { + if !self + .peers + .get_mut(&peer) + .ok_or(Error::PeerDoesntExist(peer))? + .active + .remove(&request_id) + { + tracing::warn!( + target: LOG_TARGET, + ?peer, + protocol = %self.protocol, + ?request_id, + "invalid state: received substream event but no active substream", + ); + return Err(Error::InvalidState); + } + + let event = match message { + Ok(response) => InnerRequestResponseEvent::ResponseReceived { + peer, + request_id, + response, + fallback, + }, + Err(error) => match error { + RequestResponseError::Canceled => { + tracing::debug!( + target: LOG_TARGET, + ?peer, + protocol = %self.protocol, + ?request_id, + "request canceled by local node", + ); + return Ok(()); + } + error => InnerRequestResponseEvent::RequestFailed { + peer, + request_id, + error, + }, + }, + }; + + self.event_tx.send(event).await.map_err(From::from) + } + + /// Cancel outbound request. + fn on_cancel_request(&mut self, request_id: RequestId) -> crate::Result<()> { + tracing::trace!(target: LOG_TARGET, protocol = %self.protocol, ?request_id, "cancel outbound request"); + + match self.pending_outbound_cancels.remove(&request_id) { + Some(tx) => tx.send(()).map_err(|_| Error::SubstreamDoesntExist), + None => { + tracing::debug!( + target: LOG_TARGET, + protocol = %self.protocol, + ?request_id, + "tried to cancel request which doesn't exist", + ); + + Ok(()) + } + } + } + + /// Handles the service event. + async fn handle_service_event(&mut self, event: TransportEvent) { + match event { + TransportEvent::ConnectionEstablished { peer, .. } => { + if let Err(error) = self.on_connection_established(peer).await { + tracing::debug!( + target: LOG_TARGET, + ?peer, + protocol = %self.protocol, + ?error, + "failed to handle connection established", + ); + } + } + + TransportEvent::ConnectionClosed { peer } => { + self.on_connection_closed(peer).await; + } + + TransportEvent::SubstreamOpened { + peer, + substream, + direction, + fallback, + .. + } => match direction { + Direction::Inbound => { + if let Err(error) = self.on_inbound_substream(peer, fallback, substream).await { + tracing::debug!( + target: LOG_TARGET, + ?peer, + protocol = %self.protocol, + ?error, + "failed to handle inbound substream", + ); + } + } + Direction::Outbound(substream_id) => { + let _ = + self.on_outbound_substream(peer, substream_id, substream, fallback).await; + } + }, + + TransportEvent::SubstreamOpenFailure { substream, error } => { + if let Err(error) = self.on_substream_open_failure(substream, error).await { + tracing::warn!( + target: LOG_TARGET, + protocol = %self.protocol, + ?error, + "failed to handle substream open failure", + ); + } + } + + TransportEvent::DialFailure { peer, .. } => self.on_dial_failure(peer).await, + } + } + + /// Handles the user command. + async fn handle_user_command(&mut self, command: RequestResponseCommand) { + match command { + RequestResponseCommand::SendRequest { + peer, + request_id, + request, + dial_options, + } => { + if let Err(error) = + self.on_send_request(peer, request_id, request, dial_options, None) + { + tracing::debug!( + target: LOG_TARGET, + ?peer, + protocol = %self.protocol, + ?request_id, + ?error, + "failed to send request", + ); + + if let Err(error) = self.report_request_failure(peer, request_id, error).await { + tracing::debug!( + target: LOG_TARGET, + ?peer, + protocol = %self.protocol, + ?request_id, + ?error, + "failed to report request failure", + ); + } + } + } + RequestResponseCommand::SendRequestWithFallback { + peer, + request_id, + request, + fallback, + dial_options, + } => { + if let Err(error) = + self.on_send_request(peer, request_id, request, dial_options, Some(fallback)) + { + tracing::debug!( + target: LOG_TARGET, + ?peer, + protocol = %self.protocol, + ?request_id, + ?error, + "failed to send request", + ); + + if let Err(error) = self.report_request_failure(peer, request_id, error).await { + tracing::debug!( + target: LOG_TARGET, + ?peer, + protocol = %self.protocol, + ?request_id, + ?error, + "failed to report request failure", + ); + } + } + } + RequestResponseCommand::CancelRequest { request_id } => { + if let Err(error) = self.on_cancel_request(request_id) { + tracing::debug!( + target: LOG_TARGET, + protocol = %self.protocol, + ?request_id, + ?error, + "failed to cancel reqeuest", + ); + } + } + } + } + + /// Start [`RequestResponseProtocol`] event loop. + pub async fn run(mut self) { + tracing::debug!(target: LOG_TARGET, "starting request-response event loop"); + + loop { + tokio::select! { + // events coming from the network have higher priority than user commands as all user commands are + // responses to network behaviour so ensure that the commands operate on the most up to date information. + biased; + + // Connection and substream events from the transport service. + event = self.service.next() => match event { + Some(event) => self.handle_service_event(event).await, + None => { + tracing::debug!(target: LOG_TARGET, protocol = %self.protocol, "service has exited, exiting"); + return + } + }, + + // These are outbound requests waiting for the substream to produce a response. + event = self.pending_inbound.select_next_some(), if !self.pending_inbound.is_empty() => { + let (peer, request_id, fallback, event) = event; + + if let Err(error) = self.on_substream_event(peer, request_id, fallback, event).await { + tracing::debug!( + target: LOG_TARGET, + ?peer, + protocol = %self.protocol, + ?request_id, + ?error, + "failed to handle substream event", + ); + } + + self.pending_outbound_cancels.remove(&request_id); + } + + // These are inbound requests waiting for the user to respond, then for the substream to send the response. + _ = self.pending_outbound_responses.next(), if !self.pending_outbound_responses.is_empty() => {} + + // Inbound requests that are moved to `pending_outbound_responses`. + event = self.pending_inbound_requests.next(), if !self.pending_inbound_requests.is_empty() => match event { + Some((peer, request_id, request, substream)) => { + if let Err(error) = self.on_inbound_request(peer, request_id, request, substream).await { + tracing::debug!( + target: LOG_TARGET, + ?peer, + protocol = %self.protocol, + ?request_id, + ?error, + "failed to handle inbound request", + ); + } + } + None => return, + }, + + // User commands. + command = self.command_rx.recv() => match command { + Some(command) => self.handle_user_command(command).await, + None => { + tracing::debug!(target: LOG_TARGET, protocol = %self.protocol, "user protocol has exited, exiting"); + return + } + }, + } + } + } +} diff --git a/client/litep2p/src/protocol/request_response/tests.rs b/client/litep2p/src/protocol/request_response/tests.rs new file mode 100644 index 00000000..9873170a --- /dev/null +++ b/client/litep2p/src/protocol/request_response/tests.rs @@ -0,0 +1,301 @@ +// Copyright 2023 litep2p developers +// +// Permission is hereby granted, free of charge, to any person obtaining a +// copy of this software and associated documentation files (the "Software"), +// to deal in the Software without restriction, including without limitation +// the rights to use, copy, modify, merge, publish, distribute, sublicense, +// and/or sell copies of the Software, and to permit persons to whom the +// Software is furnished to do so, subject to the following conditions: +// +// The above copyright notice and this permission notice shall be included in +// all copies or substantial portions of the Software. +// +// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS +// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE +// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER +// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING +// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER +// DEALINGS IN THE SOFTWARE. + +use crate::{ + mock::substream::{DummySubstream, MockSubstream}, + protocol::{ + request_response::{ + ConfigBuilder, DialOptions, RequestResponseError, RequestResponseEvent, + RequestResponseHandle, RequestResponseProtocol, + }, + InnerTransportEvent, SubstreamError, SubstreamKeepAlive, TransportService, + }, + substream::Substream, + transport::{ + manager::{TransportManager, TransportManagerBuilder}, + KEEP_ALIVE_TIMEOUT, + }, + types::{RequestId, SubstreamId}, + Error, PeerId, ProtocolName, +}; + +use futures::StreamExt; +use tokio::sync::mpsc::Sender; + +use std::task::Poll; + +// create new protocol for testing +fn protocol() -> ( + RequestResponseProtocol, + RequestResponseHandle, + TransportManager, + Sender, +) { + let manager = TransportManagerBuilder::new().build(); + + let peer = PeerId::random(); + let (transport_service, tx) = TransportService::new( + peer, + ProtocolName::from("/notif/1"), + Vec::new(), + std::sync::Arc::new(Default::default()), + manager.transport_manager_handle(), + KEEP_ALIVE_TIMEOUT, + SubstreamKeepAlive::Yes, + ); + let (config, handle) = + ConfigBuilder::new(ProtocolName::from("/req/1")).with_max_size(1024).build(); + + ( + RequestResponseProtocol::new(transport_service, config), + handle, + manager, + tx, + ) +} + +#[tokio::test] +#[cfg(debug_assertions)] +#[should_panic] +async fn connection_closed_twice() { + let (mut protocol, _handle, _manager, _tx) = protocol(); + + let peer = PeerId::random(); + protocol.on_connection_established(peer).await.unwrap(); + assert!(protocol.peers.contains_key(&peer)); + + protocol.on_connection_established(peer).await.unwrap(); +} + +#[tokio::test] +#[cfg(debug_assertions)] +async fn connection_established_twice() { + let (mut protocol, _handle, _manager, _tx) = protocol(); + + let peer = PeerId::random(); + protocol.on_connection_established(peer).await.unwrap(); + assert!(protocol.peers.contains_key(&peer)); + + protocol.on_connection_closed(peer).await; + assert!(!protocol.peers.contains_key(&peer)); + + protocol.on_connection_closed(peer).await; +} + +#[tokio::test] +#[cfg(debug_assertions)] +#[should_panic] +async fn unknown_outbound_substream_opened() { + let (mut protocol, _handle, _manager, _tx) = protocol(); + let peer = PeerId::random(); + + match protocol + .on_outbound_substream( + peer, + SubstreamId::from(1337usize), + Substream::new_mock( + peer, + SubstreamId::from(0usize), + Box::new(MockSubstream::new()), + ), + None, + ) + .await + { + Err(Error::InvalidState) => {} + _ => panic!("invalid return value"), + } +} + +#[tokio::test] +#[cfg(debug_assertions)] +#[should_panic] +async fn unknown_substream_open_failure() { + let (mut protocol, _handle, _manager, _tx) = protocol(); + + match protocol + .on_substream_open_failure( + SubstreamId::from(1338usize), + SubstreamError::ConnectionClosed, + ) + .await + { + Err(Error::InvalidState) => {} + _ => panic!("invalid return value"), + } +} + +#[tokio::test] +async fn cancel_unknown_request() { + let (mut protocol, _handle, _manager, _tx) = protocol(); + + let request_id = RequestId::from(1337usize); + assert!(!protocol.pending_outbound_cancels.contains_key(&request_id)); + assert!(protocol.on_cancel_request(request_id).is_ok()); +} + +#[tokio::test] +async fn substream_event_for_unknown_peer() { + let (mut protocol, _handle, _manager, _tx) = protocol(); + + // register peer + let peer = PeerId::random(); + protocol.on_connection_established(peer).await.unwrap(); + assert!(protocol.peers.contains_key(&peer)); + + match protocol + .on_substream_event(peer, RequestId::from(1337usize), None, Ok(vec![13, 37])) + .await + { + Err(Error::InvalidState) => {} + _ => panic!("invalid return value"), + } +} + +#[tokio::test] +async fn inbound_substream_error() { + let (mut protocol, _handle, _manager, _tx) = protocol(); + + // register peer + let peer = PeerId::random(); + protocol.on_connection_established(peer).await.unwrap(); + assert!(protocol.peers.contains_key(&peer)); + + let mut substream = MockSubstream::new(); + substream + .expect_poll_next() + .times(1) + .return_once(|_| Poll::Ready(Some(Err(SubstreamError::ConnectionClosed)))); + + // register inbound substream from peer + protocol + .on_inbound_substream( + peer, + None, + Substream::new_mock(peer, SubstreamId::from(0usize), Box::new(substream)), + ) + .await + .unwrap(); + + // poll the substream and get the failure event + assert_eq!(protocol.pending_inbound_requests.len(), 1); + let (peer, request_id, event, substream) = + protocol.pending_inbound_requests.next().await.unwrap(); + + match protocol.on_inbound_request(peer, request_id, event, substream).await { + Err(Error::InvalidData) => {} + _ => panic!("invalid return value"), + } +} + +// when a peer who had an active inbound substream disconnects, verify that the substream is removed +// from `pending_inbound_requests` so it doesn't generate new wake-up notifications +#[tokio::test] +async fn disconnect_peer_has_active_inbound_substream() { + let _ = tracing_subscriber::fmt() + .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) + .try_init(); + + let (mut protocol, mut handle, _manager, _tx) = protocol(); + + // register new peer + let peer = PeerId::random(); + protocol.on_connection_established(peer).await.unwrap(); + + // register inbound substream from peer + protocol + .on_inbound_substream( + peer, + None, + Substream::new_mock( + peer, + SubstreamId::from(0usize), + Box::new(DummySubstream::new()), + ), + ) + .await + .unwrap(); + + assert_eq!(protocol.pending_inbound_requests.len(), 1); + + // disconnect the peer and verify that no events are read from the handle + // since no outbound request was initiated + protocol.on_connection_closed(peer).await; + + futures::future::poll_fn(|cx| match handle.poll_next_unpin(cx) { + Poll::Pending => Poll::Ready(()), + event => panic!("read an unexpected event from handle: {event:?}"), + }) + .await; +} + +// when user initiates an outbound request and `RequestResponseProtocol` tries to open an outbound +// substream to them and it fails, the failure should be reported to the user. When the remote peer +// later disconnects, this failure should not be reported again. +#[tokio::test] +async fn request_failure_reported_once() { + let _ = tracing_subscriber::fmt() + .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) + .try_init(); + + let (mut protocol, mut handle, _manager, _tx) = protocol(); + + // register new peer + let peer = PeerId::random(); + protocol.on_connection_established(peer).await.unwrap(); + + // initiate outbound request + // + // since the peer wasn't properly registered, opening substream to them will fail + let request_id = RequestId::from(1337usize); + let error = protocol + .on_send_request( + peer, + request_id, + vec![1, 2, 3, 4], + DialOptions::Reject, + None, + ) + .unwrap_err(); + protocol.report_request_failure(peer, request_id, error).await.unwrap(); + + match handle.next().await { + Some(RequestResponseEvent::RequestFailed { + peer: request_peer, + request_id, + error, + }) => { + assert_eq!(request_peer, peer); + assert_eq!(request_id, RequestId::from(1337usize)); + assert!(matches!(error, RequestResponseError::Rejected(_))); + } + event => panic!("unexpected event: {event:?}"), + } + + // disconnect the peer and verify that no events are read from the handle + // since the outbound request failure was already reported + protocol.on_connection_closed(peer).await; + + futures::future::poll_fn(|cx| match handle.poll_next_unpin(cx) { + Poll::Pending => Poll::Ready(()), + event => panic!("read an unexpected event from handle: {event:?}"), + }) + .await; +} diff --git a/client/litep2p/src/protocol/transport_service.rs b/client/litep2p/src/protocol/transport_service.rs new file mode 100644 index 00000000..5d5c69d3 --- /dev/null +++ b/client/litep2p/src/protocol/transport_service.rs @@ -0,0 +1,1723 @@ +// Copyright 2023 litep2p developers +// +// Permission is hereby granted, free of charge, to any person obtaining a +// copy of this software and associated documentation files (the "Software"), +// to deal in the Software without restriction, including without limitation +// the rights to use, copy, modify, merge, publish, distribute, sublicense, +// and/or sell copies of the Software, and to permit persons to whom the +// Software is furnished to do so, subject to the following conditions: +// +// The above copyright notice and this permission notice shall be included in +// all copies or substantial portions of the Software. +// +// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS +// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE +// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER +// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING +// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER +// DEALINGS IN THE SOFTWARE. + +use crate::{ + addresses::PublicAddresses, + error::{Error, ImmediateDialError, SubstreamError}, + protocol::{connection::ConnectionHandle, InnerTransportEvent, TransportEvent}, + transport::{manager::TransportManagerHandle, Endpoint}, + types::{protocol::ProtocolName, ConnectionId, SubstreamId}, + PeerId, DEFAULT_CHANNEL_SIZE, +}; + +use futures::{future::BoxFuture, stream::FuturesUnordered, Stream, StreamExt}; +use multiaddr::{Multiaddr, Protocol}; +use multihash::Multihash; +use tokio::sync::mpsc::{channel, Receiver, Sender}; + +use std::{ + collections::{HashMap, HashSet}, + fmt::Debug, + pin::Pin, + sync::{ + atomic::{AtomicUsize, Ordering}, + Arc, + }, + task::{Context, Poll, Waker}, + time::{Duration, Instant}, +}; + +/// Logging target for the file. +const LOG_TARGET: &str = "litep2p::transport-service"; + +/// Connection context for the peer. +/// +/// Each peer is allowed to have at most two connections open. The first open connection is the +/// primary connections which the local node uses to open substreams to remote. Secondary connection +/// may be open if local and remote opened connections at the same time. +/// +/// Secondary connection may be promoted to a primary connection if the primary connections closes +/// while the secondary connections remains open. +#[derive(Debug)] +struct ConnectionContext { + /// Primary connection. + primary: ConnectionHandle, + + /// Secondary connection, if it exists. + secondary: Option, +} + +impl ConnectionContext { + /// Create new [`ConnectionContext`]. + fn new(primary: ConnectionHandle) -> Self { + Self { + primary, + secondary: None, + } + } + + /// Downgrade connection to non-active which means it will be closed + /// if there are no substreams open over it. + fn downgrade(&mut self, connection_id: &ConnectionId) { + if self.primary.connection_id() == connection_id { + self.primary.close(); + return; + } + + if let Some(handle) = &mut self.secondary { + if handle.connection_id() == connection_id { + handle.close(); + return; + } + } + + tracing::debug!( + target: LOG_TARGET, + primary = ?self.primary.connection_id(), + secondary = ?self.secondary.as_ref().map(|handle| handle.connection_id()), + ?connection_id, + "connection doesn't exist, cannot downgrade", + ); + } + + /// Try to upgrade the connection to active state. + fn try_upgrade(&mut self, connection_id: &ConnectionId) { + if self.primary.connection_id() == connection_id { + self.primary.try_upgrade(); + return; + } + + if let Some(handle) = &mut self.secondary { + if handle.connection_id() == connection_id { + handle.try_upgrade(); + return; + } + } + + tracing::debug!( + target: LOG_TARGET, + primary = ?self.primary.connection_id(), + secondary = ?self.secondary.as_ref().map(|handle| handle.connection_id()), + ?connection_id, + "connection doesn't exist, cannot upgrade", + ); + } +} + +/// Tracks connection keep-alive timeouts. +/// +/// A connection keep-alive timeout is started when a connection is established. +/// If no substreams are opened over the connection within the timeout, +/// the connection is downgraded. However, if a substream is opened over the connection, +/// the timeout is reset. +#[derive(Debug)] +struct KeepAliveTracker { + /// Close the connection if no substreams are open within this time frame. + keep_alive_timeout: Duration, + + /// Track substream last activity. + last_activity: HashMap<(PeerId, ConnectionId), Instant>, + + /// Pending keep-alive timeouts. + pending_keep_alive_timeouts: FuturesUnordered>, + + /// Saved waker. + waker: Option, +} + +impl KeepAliveTracker { + /// Create new [`KeepAliveTracker`]. + pub fn new(keep_alive_timeout: Duration) -> Self { + Self { + keep_alive_timeout, + last_activity: HashMap::new(), + pending_keep_alive_timeouts: FuturesUnordered::new(), + waker: None, + } + } + + /// Called on connection established event to add a new keep-alive timeout. + pub fn on_connection_established(&mut self, peer: PeerId, connection_id: ConnectionId) { + self.substream_activity(peer, connection_id); + } + + /// Called on connection closed event. + pub fn on_connection_closed(&mut self, peer: PeerId, connection_id: ConnectionId) { + self.last_activity.remove(&(peer, connection_id)); + } + + /// Called on substream opened event to track the last activity. + pub fn substream_activity(&mut self, peer: PeerId, connection_id: ConnectionId) { + // Keep track of the connection ID and the time the substream was opened. + if self.last_activity.insert((peer, connection_id), Instant::now()).is_none() { + // Refill futures if there is no pending keep-alive timeout. + let timeout = self.keep_alive_timeout; + self.pending_keep_alive_timeouts.push(Box::pin(async move { + tokio::time::sleep(timeout).await; + (peer, connection_id) + })); + } + + tracing::trace!( + target: LOG_TARGET, + ?peer, + ?connection_id, + ?self.keep_alive_timeout, + last_activity = ?self.last_activity.len(), + pending_keep_alive_timeouts = ?self.pending_keep_alive_timeouts.len(), + "substream activity", + ); + + // Wake any pending poll. + if let Some(waker) = self.waker.take() { + waker.wake() + } + } +} + +impl Stream for KeepAliveTracker { + type Item = (PeerId, ConnectionId); + + fn poll_next(mut self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll> { + if self.pending_keep_alive_timeouts.is_empty() { + // No pending keep-alive timeouts. + self.waker = Some(cx.waker().clone()); + return Poll::Pending; + } + + match self.pending_keep_alive_timeouts.poll_next_unpin(cx) { + Poll::Ready(Some(key)) => { + // Check last-activity time. + let Some(last_activity) = self.last_activity.get(&key) else { + tracing::debug!( + target: LOG_TARGET, + peer = ?key.0, + connection_id = ?key.1, + "Last activity no longer tracks the connection (closed event triggered)", + ); + + // We have effectively ignored this `Poll::Ready` event. To prevent the + // future from getting stuck, we need to tell the executor to poll again + // for more events. + cx.waker().wake_by_ref(); + return Poll::Pending; + }; + + // Keep-alive timeout not reached yet. + let inactive_for = last_activity.elapsed(); + if inactive_for < self.keep_alive_timeout { + let timeout = self.keep_alive_timeout.saturating_sub(inactive_for); + + tracing::trace!( + target: LOG_TARGET, + peer = ?key.0, + connection_id = ?key.1, + ?timeout, + "keep-alive timeout not yet reached", + ); + + // Refill the keep alive timeouts. + self.pending_keep_alive_timeouts.push(Box::pin(async move { + tokio::time::sleep(timeout).await; + key + })); + + // This is similar to the `last_activity` check above, we need to inform + // the executor that this object may produce more events. + cx.waker().wake_by_ref(); + return Poll::Pending; + } + + // Keep-alive timeout reached. + tracing::debug!( + target: LOG_TARGET, + peer = ?key.0, + connection_id = ?key.1, + "keep-alive timeout triggered", + ); + self.last_activity.remove(&key); + Poll::Ready(Some(key)) + } + Poll::Ready(None) | Poll::Pending => Poll::Pending, + } + } +} + +/// Whether this protocol substream activity can keep connection alive. +#[derive(Debug, Clone, Copy, PartialEq, Eq)] +pub enum SubstreamKeepAlive { + /// Yes. + Yes, + /// No. + No, +} + +impl SubstreamKeepAlive { + /// Shortcut to `(self == SubstreamKeepAlive::Yes).then()`. + #[inline] + pub fn then T>(&self, f: F) -> Option { + (*self == SubstreamKeepAlive::Yes).then(f) + } +} + +/// Provides an interfaces for [`Litep2p`](crate::Litep2p) protocols to interact +/// with the underlying transport protocols. +#[derive(Debug)] +pub struct TransportService { + /// Local peer ID. + local_peer_id: PeerId, + + /// Protocol. + protocol: ProtocolName, + + /// Fallback names for the protocol. + fallback_names: Vec, + + /// Open connections. + connections: HashMap, + + /// Transport handle. + transport_handle: TransportManagerHandle, + + /// RX channel for receiving events from tranports and connections. + rx: Receiver, + + /// Next substream ID. + next_substream_id: Arc, + + /// Close the connection if no substreams are open within this time frame. + keep_alive_tracker: KeepAliveTracker, + + /// Whether this protocol susbstreams should keep connection alive. + substream_keep_alive: SubstreamKeepAlive, +} + +impl TransportService { + /// Create new [`TransportService`]. + pub(crate) fn new( + local_peer_id: PeerId, + protocol: ProtocolName, + fallback_names: Vec, + next_substream_id: Arc, + transport_handle: TransportManagerHandle, + keep_alive_timeout: Duration, + substream_keep_alive: SubstreamKeepAlive, + ) -> (Self, Sender) { + let (tx, rx) = channel(DEFAULT_CHANNEL_SIZE); + + let keep_alive_tracker = KeepAliveTracker::new(keep_alive_timeout); + + ( + Self { + rx, + protocol, + local_peer_id, + fallback_names, + transport_handle, + next_substream_id, + connections: HashMap::new(), + keep_alive_tracker, + substream_keep_alive, + }, + tx, + ) + } + + /// Get the list of public addresses of the node. + pub fn public_addresses(&self) -> PublicAddresses { + self.transport_handle.public_addresses() + } + + /// Get the list of listen addresses of the node. + pub fn listen_addresses(&self) -> HashSet { + self.transport_handle.listen_addresses() + } + + /// Handle connection established event. + fn on_connection_established( + &mut self, + peer: PeerId, + endpoint: Endpoint, + connection_id: ConnectionId, + handle: ConnectionHandle, + ) -> Option { + tracing::debug!( + target: LOG_TARGET, + ?peer, + ?endpoint, + ?connection_id, + protocol = %self.protocol, + current_state = ?self.connections.get(&peer), + "on connection established", + ); + + match self.connections.get_mut(&peer) { + Some(context) => match context.secondary { + Some(_) => { + tracing::debug!( + target: LOG_TARGET, + ?peer, + ?connection_id, + ?endpoint, + protocol = %self.protocol, + "ignoring third connection", + ); + None + } + None => { + self.keep_alive_tracker.on_connection_established(peer, connection_id); + + tracing::trace!( + target: LOG_TARGET, + ?peer, + ?endpoint, + ?connection_id, + protocol = %self.protocol, + "secondary connection established", + ); + + context.secondary = Some(handle); + + None + } + }, + None => { + tracing::trace!( + target: LOG_TARGET, + ?peer, + ?endpoint, + ?connection_id, + protocol = %self.protocol, + "primary connection established", + ); + + self.connections.insert(peer, ConnectionContext::new(handle)); + + self.keep_alive_tracker.on_connection_established(peer, connection_id); + + Some(TransportEvent::ConnectionEstablished { peer, endpoint }) + } + } + } + + /// Handle connection closed event. + fn on_connection_closed( + &mut self, + peer: PeerId, + connection_id: ConnectionId, + ) -> Option { + tracing::debug!( + target: LOG_TARGET, + ?peer, + ?connection_id, + protocol = %self.protocol, + current_state = ?self.connections.get(&peer), + "on connection closed", + ); + + self.keep_alive_tracker.on_connection_closed(peer, connection_id); + + let Some(context) = self.connections.get_mut(&peer) else { + tracing::warn!( + target: LOG_TARGET, + ?peer, + ?connection_id, + protocol = %self.protocol, + "connection closed to a non-existent peer", + ); + + debug_assert!(false); + return None; + }; + + // if the primary connection was closed, check if there exist a secondary connection + // and if it does, convert the secondary connection a primary connection + if context.primary.connection_id() == &connection_id { + tracing::trace!( + target: LOG_TARGET, + ?peer, + ?connection_id, + protocol = %self.protocol, + "primary connection closed" + ); + + match context.secondary.take() { + None => { + self.connections.remove(&peer); + return Some(TransportEvent::ConnectionClosed { peer }); + } + Some(handle) => { + tracing::debug!( + target: LOG_TARGET, + ?peer, + ?connection_id, + protocol = %self.protocol, + "switch to secondary connection", + ); + + context.primary = handle; + return None; + } + } + } + + match context.secondary.take() { + Some(handle) if handle.connection_id() == &connection_id => { + tracing::trace!( + target: LOG_TARGET, + ?peer, + ?connection_id, + protocol = %self.protocol, + "secondary connection closed", + ); + + None + } + connection_state => { + tracing::debug!( + target: LOG_TARGET, + ?peer, + ?connection_id, + ?connection_state, + protocol = %self.protocol, + "connection closed but it doesn't exist", + ); + + None + } + } + } + + /// Dial `peer` using `PeerId`. + /// + /// Call fails if `Litep2p` doesn't have a known address for the peer. + pub fn dial(&mut self, peer: &PeerId) -> Result<(), ImmediateDialError> { + tracing::trace!( + target: LOG_TARGET, + ?peer, + protocol = %self.protocol, + "Dial peer requested", + ); + + self.transport_handle.dial(peer) + } + + /// Dial peer using a `Multiaddr`. + /// + /// Call fails if the address is not in correct format or it contains an unsupported/disabled + /// transport. + /// + /// Calling this function is only necessary for those addresses that are discovered out-of-band + /// since `Litep2p` internally keeps track of all peer addresses it has learned through user + /// calling this function, Kademlia peer discoveries and `Identify` responses. + pub fn dial_address(&mut self, address: Multiaddr) -> Result<(), ImmediateDialError> { + tracing::trace!( + target: LOG_TARGET, + ?address, + protocol = %self.protocol, + "Dial address requested", + ); + + self.transport_handle.dial_address(address) + } + + /// Add one or more addresses for `peer`. + /// + /// The list is filtered for duplicates and unsupported transports. + pub fn add_known_address(&mut self, peer: &PeerId, addresses: impl Iterator) { + let addresses: HashSet = addresses + .filter_map(|address| { + if !std::matches!(address.iter().last(), Some(Protocol::P2p(_))) { + Some(address.with(Protocol::P2p(Multihash::from_bytes(&peer.to_bytes()).ok()?))) + } else { + Some(address) + } + }) + .collect(); + + self.transport_handle.add_known_address(peer, addresses.into_iter()); + } + + /// Open substream to `peer`. + /// + /// Call fails if there is no connection open to `peer` or the channel towards + /// the connection is clogged. + pub fn open_substream(&mut self, peer: PeerId) -> Result { + // always prefer the primary connection + let connection = &mut self + .connections + .get_mut(&peer) + .ok_or(SubstreamError::PeerDoesNotExist(peer))? + .primary; + + let connection_id = *connection.connection_id(); + + // This permit will be passed on until the substream is reported back to + // [`TransportService`] in [`InnerTransportEvent::SubstreamOpened`] and connection + // upgraded. + let permit = connection.try_get_permit().ok_or(SubstreamError::ConnectionClosed)?; + + let substream_id = + SubstreamId::from(self.next_substream_id.fetch_add(1usize, Ordering::Relaxed)); + + tracing::trace!( + target: LOG_TARGET, + ?peer, + protocol = %self.protocol, + ?substream_id, + ?connection_id, + "open substream", + ); + + if self.substream_keep_alive == SubstreamKeepAlive::Yes { + self.keep_alive_tracker.substream_activity(peer, connection_id); + connection.try_upgrade(); + } + + connection + .open_substream( + self.protocol.clone(), + self.fallback_names.clone(), + substream_id, + permit, + self.substream_keep_alive, + ) + .map(|_| substream_id) + } + + /// Forcibly close the connection, even if other protocols have substreams open over it. + pub fn force_close(&mut self, peer: PeerId) -> crate::Result<()> { + let connection = + &mut self.connections.get_mut(&peer).ok_or(Error::PeerDoesntExist(peer))?; + + tracing::trace!( + target: LOG_TARGET, + ?peer, + protocol = %self.protocol, + secondary = ?connection.secondary, + "forcibly closing the connection", + ); + + if let Some(ref mut connection) = connection.secondary { + let _ = connection.force_close(); + } + + connection.primary.force_close() + } + + /// Get local peer ID. + pub fn local_peer_id(&self) -> PeerId { + self.local_peer_id + } + + /// Dynamically unregister a protocol. + /// + /// This must be called when a protocol is no longer needed (e.g. user dropped the protocol + /// handle). + pub fn unregister_protocol(&self) { + self.transport_handle.unregister_protocol(self.protocol.clone()); + } +} + +impl Stream for TransportService { + type Item = TransportEvent; + + fn poll_next(mut self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll> { + let protocol_name = self.protocol.clone(); + let keep_alive_timeout = self.keep_alive_tracker.keep_alive_timeout; + + while let Poll::Ready(event) = self.rx.poll_recv(cx) { + match event { + None => { + tracing::warn!( + target: LOG_TARGET, + protocol = ?protocol_name, + "transport service closed" + ); + return Poll::Ready(None); + } + Some(InnerTransportEvent::ConnectionEstablished { + peer, + endpoint, + sender, + connection, + }) => { + if let Some(event) = + self.on_connection_established(peer, endpoint, connection, sender) + { + return Poll::Ready(Some(event)); + } + } + Some(InnerTransportEvent::ConnectionClosed { peer, connection }) => { + if let Some(event) = self.on_connection_closed(peer, connection) { + return Poll::Ready(Some(event)); + } + } + Some(InnerTransportEvent::SubstreamOpened { + peer, + protocol, + fallback, + direction, + substream, + connection_id, + opening_permit, + }) => { + if protocol == self.protocol + && self.substream_keep_alive == SubstreamKeepAlive::Yes + { + self.keep_alive_tracker.substream_activity(peer, connection_id); + if let Some(context) = self.connections.get_mut(&peer) { + context.try_upgrade(&connection_id); + } + } + + // Connection is upgraded, we must now drop the permit. + // This is for the reader, not for compiler. + drop(opening_permit); + + return Poll::Ready(Some(TransportEvent::SubstreamOpened { + peer, + protocol, + fallback, + direction, + substream, + })); + } + Some(event) => return Poll::Ready(Some(event.into())), + } + } + + while let Poll::Ready(Some((peer, connection_id))) = + self.keep_alive_tracker.poll_next_unpin(cx) + { + if let Some(context) = self.connections.get_mut(&peer) { + tracing::debug!( + target: LOG_TARGET, + ?peer, + ?connection_id, + protocol = ?protocol_name, + timeout = ?keep_alive_timeout, + "keep-alive timeout over, downgrade connection", + ); + + context.downgrade(&connection_id); + } + } + + Poll::Pending + } +} + +#[cfg(test)] +mod tests { + use super::*; + use crate::{ + protocol::{ProtocolCommand, SubstreamKeepAlive, TransportService}, + transport::{ + manager::{handle::InnerTransportManagerCommand, TransportManagerHandle}, + KEEP_ALIVE_TIMEOUT, + }, + }; + use futures::StreamExt; + use parking_lot::RwLock; + use std::collections::HashSet; + + /// Create new `TransportService` + fn transport_service() -> ( + TransportService, + Sender, + Receiver, + ) { + let (cmd_tx, cmd_rx) = channel(64); + let peer = PeerId::random(); + + let handle = TransportManagerHandle::new( + peer, + Arc::new(RwLock::new(HashMap::new())), + cmd_tx, + HashSet::new(), + Default::default(), + PublicAddresses::new(peer), + ); + + let (service, sender) = TransportService::new( + peer, + ProtocolName::from("/notif/1"), + Vec::new(), + Arc::new(AtomicUsize::new(0usize)), + handle, + KEEP_ALIVE_TIMEOUT, + SubstreamKeepAlive::Yes, + ); + + (service, sender, cmd_rx) + } + + #[tokio::test] + async fn secondary_connection_stored() { + let (mut service, sender, _) = transport_service(); + let peer = PeerId::random(); + + // register first connection + let (cmd_tx1, _cmd_rx1) = channel(64); + sender + .send(InnerTransportEvent::ConnectionEstablished { + peer, + connection: ConnectionId::from(0usize), + endpoint: Endpoint::listener(Multiaddr::empty(), ConnectionId::from(0usize)), + sender: ConnectionHandle::new(ConnectionId::from(0usize), cmd_tx1), + }) + .await + .unwrap(); + + if let Some(TransportEvent::ConnectionEstablished { + peer: connected_peer, + endpoint, + }) = service.next().await + { + assert_eq!(connected_peer, peer); + assert_eq!(endpoint.address(), &Multiaddr::empty()); + } else { + panic!("expected event from `TransportService`"); + }; + + // register secondary connection + let (cmd_tx2, _cmd_rx2) = channel(64); + sender + .send(InnerTransportEvent::ConnectionEstablished { + peer, + connection: ConnectionId::from(1usize), + endpoint: Endpoint::listener(Multiaddr::empty(), ConnectionId::from(1usize)), + sender: ConnectionHandle::new(ConnectionId::from(1usize), cmd_tx2), + }) + .await + .unwrap(); + + futures::future::poll_fn(|cx| match service.poll_next_unpin(cx) { + std::task::Poll::Ready(_) => panic!("didn't expect event from `TransportService`"), + std::task::Poll::Pending => std::task::Poll::Ready(()), + }) + .await; + + let context = service.connections.get(&peer).unwrap(); + assert_eq!(context.primary.connection_id(), &ConnectionId::from(0usize)); + assert_eq!( + context.secondary.as_ref().unwrap().connection_id(), + &ConnectionId::from(1usize) + ); + } + + #[tokio::test] + async fn tertiary_connection_ignored() { + let (mut service, sender, _) = transport_service(); + let peer = PeerId::random(); + + // register first connection + let (cmd_tx1, _cmd_rx1) = channel(64); + sender + .send(InnerTransportEvent::ConnectionEstablished { + peer, + connection: ConnectionId::from(0usize), + endpoint: Endpoint::dialer(Multiaddr::empty(), ConnectionId::from(0usize)), + sender: ConnectionHandle::new(ConnectionId::from(0usize), cmd_tx1), + }) + .await + .unwrap(); + + if let Some(TransportEvent::ConnectionEstablished { + peer: connected_peer, + endpoint, + }) = service.next().await + { + assert_eq!(connected_peer, peer); + assert_eq!(endpoint.address(), &Multiaddr::empty()); + } else { + panic!("expected event from `TransportService`"); + }; + + // register secondary connection + let (cmd_tx2, _cmd_rx2) = channel(64); + sender + .send(InnerTransportEvent::ConnectionEstablished { + peer, + connection: ConnectionId::from(1usize), + endpoint: Endpoint::dialer(Multiaddr::empty(), ConnectionId::from(1usize)), + sender: ConnectionHandle::new(ConnectionId::from(1usize), cmd_tx2), + }) + .await + .unwrap(); + + futures::future::poll_fn(|cx| match service.poll_next_unpin(cx) { + std::task::Poll::Ready(_) => panic!("didn't expect event from `TransportService`"), + std::task::Poll::Pending => std::task::Poll::Ready(()), + }) + .await; + + let context = service.connections.get(&peer).unwrap(); + assert_eq!(context.primary.connection_id(), &ConnectionId::from(0usize)); + assert_eq!( + context.secondary.as_ref().unwrap().connection_id(), + &ConnectionId::from(1usize) + ); + + // try to register tertiary connection and verify it's ignored + let (cmd_tx3, mut cmd_rx3) = channel(64); + sender + .send(InnerTransportEvent::ConnectionEstablished { + peer, + connection: ConnectionId::from(2usize), + endpoint: Endpoint::listener(Multiaddr::empty(), ConnectionId::from(2usize)), + sender: ConnectionHandle::new(ConnectionId::from(2usize), cmd_tx3), + }) + .await + .unwrap(); + + futures::future::poll_fn(|cx| match service.poll_next_unpin(cx) { + std::task::Poll::Ready(_) => panic!("didn't expect event from `TransportService`"), + std::task::Poll::Pending => std::task::Poll::Ready(()), + }) + .await; + + let context = service.connections.get(&peer).unwrap(); + assert_eq!(context.primary.connection_id(), &ConnectionId::from(0usize)); + assert_eq!( + context.secondary.as_ref().unwrap().connection_id(), + &ConnectionId::from(1usize) + ); + assert!(cmd_rx3.try_recv().is_err()); + } + + #[tokio::test] + async fn secondary_closing_does_not_emit_event() { + let _ = tracing_subscriber::fmt() + .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) + .try_init(); + + let (mut service, sender, _) = transport_service(); + let peer = PeerId::random(); + + // register first connection + let (cmd_tx1, _cmd_rx1) = channel(64); + sender + .send(InnerTransportEvent::ConnectionEstablished { + peer, + connection: ConnectionId::from(0usize), + endpoint: Endpoint::dialer(Multiaddr::empty(), ConnectionId::from(0usize)), + sender: ConnectionHandle::new(ConnectionId::from(0usize), cmd_tx1), + }) + .await + .unwrap(); + + if let Some(TransportEvent::ConnectionEstablished { + peer: connected_peer, + endpoint, + }) = service.next().await + { + assert_eq!(connected_peer, peer); + assert_eq!(endpoint.address(), &Multiaddr::empty()); + } else { + panic!("expected event from `TransportService`"); + }; + + // register secondary connection + let (cmd_tx2, _cmd_rx2) = channel(64); + sender + .send(InnerTransportEvent::ConnectionEstablished { + peer, + connection: ConnectionId::from(1usize), + endpoint: Endpoint::dialer(Multiaddr::empty(), ConnectionId::from(1usize)), + sender: ConnectionHandle::new(ConnectionId::from(1usize), cmd_tx2), + }) + .await + .unwrap(); + + futures::future::poll_fn(|cx| match service.poll_next_unpin(cx) { + std::task::Poll::Ready(_) => panic!("didn't expect event from `TransportService`"), + std::task::Poll::Pending => std::task::Poll::Ready(()), + }) + .await; + + let context = service.connections.get(&peer).unwrap(); + assert_eq!(context.primary.connection_id(), &ConnectionId::from(0usize)); + assert_eq!( + context.secondary.as_ref().unwrap().connection_id(), + &ConnectionId::from(1usize) + ); + + // close the secondary connection + sender + .send(InnerTransportEvent::ConnectionClosed { + peer, + connection: ConnectionId::from(1usize), + }) + .await + .unwrap(); + + // verify that the protocol is not notified + futures::future::poll_fn(|cx| match service.poll_next_unpin(cx) { + std::task::Poll::Ready(_) => panic!("didn't expect event from `TransportService`"), + std::task::Poll::Pending => std::task::Poll::Ready(()), + }) + .await; + + // verify that the secondary connection doesn't exist anymore + let context = service.connections.get(&peer).unwrap(); + assert_eq!(context.primary.connection_id(), &ConnectionId::from(0usize)); + assert!(context.secondary.is_none()); + } + + #[tokio::test] + async fn convert_secondary_to_primary() { + let (mut service, sender, _) = transport_service(); + let peer = PeerId::random(); + + // register first connection + let (cmd_tx1, mut cmd_rx1) = channel(64); + sender + .send(InnerTransportEvent::ConnectionEstablished { + peer, + connection: ConnectionId::from(0usize), + endpoint: Endpoint::dialer(Multiaddr::empty(), ConnectionId::from(0usize)), + sender: ConnectionHandle::new(ConnectionId::from(0usize), cmd_tx1), + }) + .await + .unwrap(); + + if let Some(TransportEvent::ConnectionEstablished { + peer: connected_peer, + endpoint, + }) = service.next().await + { + assert_eq!(connected_peer, peer); + assert_eq!(endpoint.address(), &Multiaddr::empty()); + } else { + panic!("expected event from `TransportService`"); + }; + + // register secondary connection + let (cmd_tx2, mut cmd_rx2) = channel(64); + sender + .send(InnerTransportEvent::ConnectionEstablished { + peer, + connection: ConnectionId::from(1usize), + endpoint: Endpoint::listener(Multiaddr::empty(), ConnectionId::from(1usize)), + sender: ConnectionHandle::new(ConnectionId::from(1usize), cmd_tx2), + }) + .await + .unwrap(); + + futures::future::poll_fn(|cx| match service.poll_next_unpin(cx) { + std::task::Poll::Ready(_) => panic!("didn't expect event from `TransportService`"), + std::task::Poll::Pending => std::task::Poll::Ready(()), + }) + .await; + + let context = service.connections.get(&peer).unwrap(); + assert_eq!(context.primary.connection_id(), &ConnectionId::from(0usize)); + assert_eq!( + context.secondary.as_ref().unwrap().connection_id(), + &ConnectionId::from(1usize) + ); + + // close the primary connection + sender + .send(InnerTransportEvent::ConnectionClosed { + peer, + connection: ConnectionId::from(0usize), + }) + .await + .unwrap(); + + // verify that the protocol is not notified + futures::future::poll_fn(|cx| match service.poll_next_unpin(cx) { + std::task::Poll::Ready(_) => panic!("didn't expect event from `TransportService`"), + std::task::Poll::Pending => std::task::Poll::Ready(()), + }) + .await; + + // verify that the primary connection has been replaced + let context = service.connections.get(&peer).unwrap(); + assert_eq!(context.primary.connection_id(), &ConnectionId::from(1usize)); + assert!(context.secondary.is_none()); + assert!(cmd_rx1.try_recv().is_err()); + + // close the secondary connection as well + sender + .send(InnerTransportEvent::ConnectionClosed { + peer, + connection: ConnectionId::from(1usize), + }) + .await + .unwrap(); + + if let Some(TransportEvent::ConnectionClosed { + peer: disconnected_peer, + }) = service.next().await + { + assert_eq!(disconnected_peer, peer); + } else { + panic!("expected event from `TransportService`"); + }; + + // verify that the primary connection has been replaced + assert!(service.connections.get(&peer).is_none()); + assert!(cmd_rx2.try_recv().is_err()); + } + + #[tokio::test] + async fn keep_alive_timeout_expires_for_a_stale_connection() { + let _ = tracing_subscriber::fmt() + .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) + .try_init(); + + let (mut service, sender, _) = transport_service(); + let peer = PeerId::random(); + + // register first connection + let (cmd_tx1, _cmd_rx1) = channel(64); + sender + .send(InnerTransportEvent::ConnectionEstablished { + peer, + connection: ConnectionId::from(1337usize), + endpoint: Endpoint::dialer(Multiaddr::empty(), ConnectionId::from(1337usize)), + sender: ConnectionHandle::new(ConnectionId::from(1337usize), cmd_tx1), + }) + .await + .unwrap(); + + if let Some(TransportEvent::ConnectionEstablished { + peer: connected_peer, + endpoint, + }) = service.next().await + { + assert_eq!(connected_peer, peer); + assert_eq!(endpoint.address(), &Multiaddr::empty()); + } else { + panic!("expected event from `TransportService`"); + }; + + // verify the first connection state is correct + assert_eq!(service.keep_alive_tracker.last_activity.len(), 1); + match service.connections.get(&peer) { + Some(context) => { + assert_eq!( + context.primary.connection_id(), + &ConnectionId::from(1337usize) + ); + assert!(context.secondary.is_none()); + } + None => panic!("expected {peer} to exist"), + } + + // close the primary connection + sender + .send(InnerTransportEvent::ConnectionClosed { + peer, + connection: ConnectionId::from(1337usize), + }) + .await + .unwrap(); + + // verify that the protocols are notified of the connection closing as well + if let Some(TransportEvent::ConnectionClosed { + peer: connected_peer, + }) = service.next().await + { + assert_eq!(connected_peer, peer); + } else { + panic!("expected event from `TransportService`"); + } + + // Because the connection was closed, the peer is no longer tracked for keep-alive. + // This leads to better tracking overall since we don't have to track stale connections. + assert!(service.keep_alive_tracker.last_activity.is_empty()); + assert!(service.connections.get(&peer).is_none()); + + // Register new primary connection. + let (cmd_tx1, _cmd_rx1) = channel(64); + sender + .send(InnerTransportEvent::ConnectionEstablished { + peer, + connection: ConnectionId::from(1338usize), + endpoint: Endpoint::listener(Multiaddr::empty(), ConnectionId::from(1338usize)), + sender: ConnectionHandle::new(ConnectionId::from(1338usize), cmd_tx1), + }) + .await + .unwrap(); + + if let Some(TransportEvent::ConnectionEstablished { + peer: connected_peer, + endpoint, + }) = service.next().await + { + assert_eq!(connected_peer, peer); + assert_eq!(endpoint.address(), &Multiaddr::empty()); + } else { + panic!("expected event from `TransportService`"); + }; + + assert_eq!(service.keep_alive_tracker.last_activity.len(), 1); + match service.connections.get(&peer) { + Some(context) => { + assert_eq!( + context.primary.connection_id(), + &ConnectionId::from(1338usize) + ); + assert!(context.secondary.is_none()); + } + None => panic!("expected {peer} to exist"), + } + + match tokio::time::timeout(Duration::from_secs(10), service.next()).await { + Ok(event) => panic!("didn't expect an event: {event:?}"), + Err(_) => {} + } + } + + async fn poll_service(service: &mut TransportService) { + futures::future::poll_fn(|cx| match service.poll_next_unpin(cx) { + std::task::Poll::Ready(_) => panic!("didn't expect event from `TransportService`"), + std::task::Poll::Pending => std::task::Poll::Ready(()), + }) + .await; + } + + #[tokio::test] + async fn keep_alive_timeout_downgrades_connections() { + let _ = tracing_subscriber::fmt() + .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) + .try_init(); + + let (mut service, sender, _) = transport_service(); + let peer = PeerId::random(); + + // register first connection + let (cmd_tx1, _cmd_rx1) = channel(64); + sender + .send(InnerTransportEvent::ConnectionEstablished { + peer, + connection: ConnectionId::from(1337usize), + endpoint: Endpoint::dialer(Multiaddr::empty(), ConnectionId::from(1337usize)), + sender: ConnectionHandle::new(ConnectionId::from(1337usize), cmd_tx1), + }) + .await + .unwrap(); + + if let Some(TransportEvent::ConnectionEstablished { + peer: connected_peer, + endpoint, + }) = service.next().await + { + assert_eq!(connected_peer, peer); + assert_eq!(endpoint.address(), &Multiaddr::empty()); + } else { + panic!("expected event from `TransportService`"); + }; + + // verify the first connection state is correct + assert_eq!(service.keep_alive_tracker.last_activity.len(), 1); + match service.connections.get(&peer) { + Some(context) => { + assert_eq!( + context.primary.connection_id(), + &ConnectionId::from(1337usize) + ); + // Check the connection is still active. + assert!(context.primary.is_active()); + assert!(context.secondary.is_none()); + } + None => panic!("expected {peer} to exist"), + } + + poll_service(&mut service).await; + tokio::time::sleep(KEEP_ALIVE_TIMEOUT + std::time::Duration::from_secs(1)).await; + poll_service(&mut service).await; + + // Verify the connection is downgraded. + match service.connections.get(&peer) { + Some(context) => { + assert_eq!( + context.primary.connection_id(), + &ConnectionId::from(1337usize) + ); + // Check the connection is not active. + assert!(!context.primary.is_active()); + assert!(context.secondary.is_none()); + } + None => panic!("expected {peer} to exist"), + } + + assert_eq!(service.keep_alive_tracker.last_activity.len(), 0); + } + + #[tokio::test] + async fn keep_alive_timeout_reset_when_user_opens_substream() { + let _ = tracing_subscriber::fmt() + .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) + .try_init(); + + let (mut service, sender, _) = transport_service(); + let peer = PeerId::random(); + + // register first connection + let (cmd_tx1, _cmd_rx1) = channel(64); + sender + .send(InnerTransportEvent::ConnectionEstablished { + peer, + connection: ConnectionId::from(1337usize), + endpoint: Endpoint::dialer(Multiaddr::empty(), ConnectionId::from(1337usize)), + sender: ConnectionHandle::new(ConnectionId::from(1337usize), cmd_tx1), + }) + .await + .unwrap(); + + if let Some(TransportEvent::ConnectionEstablished { + peer: connected_peer, + endpoint, + }) = service.next().await + { + assert_eq!(connected_peer, peer); + assert_eq!(endpoint.address(), &Multiaddr::empty()); + } else { + panic!("expected event from `TransportService`"); + }; + + // verify the first connection state is correct + assert_eq!(service.keep_alive_tracker.last_activity.len(), 1); + match service.connections.get(&peer) { + Some(context) => { + assert_eq!( + context.primary.connection_id(), + &ConnectionId::from(1337usize) + ); + // Check the connection is still active. + assert!(context.primary.is_active()); + assert!(context.secondary.is_none()); + } + None => panic!("expected {peer} to exist"), + } + + poll_service(&mut service).await; + // Sleep for almost the entire keep-alive timeout. + tokio::time::sleep(std::time::Duration::from_secs(3)).await; + + // This ensures we reset the keep-alive timer when other protocols + // want to open a substream. + // We are still tracking the same peer. + service.open_substream(peer).unwrap(); + assert_eq!(service.keep_alive_tracker.last_activity.len(), 1); + + poll_service(&mut service).await; + // The keep alive timeout should be advanced. + tokio::time::sleep(std::time::Duration::from_secs(3)).await; + poll_service(&mut service).await; + assert_eq!(service.keep_alive_tracker.last_activity.len(), 1); + // If the `service.open_substream` wasn't called, the connection would have been downgraded. + // Instead the keep-alive was forwarded `KEEP_ALIVE_TIMEOUT` seconds into the future. + // Verify the connection is still active. + match service.connections.get(&peer) { + Some(context) => { + assert_eq!( + context.primary.connection_id(), + &ConnectionId::from(1337usize) + ); + assert!(context.primary.is_active()); + assert!(context.secondary.is_none()); + } + None => panic!("expected {peer} to exist"), + } + + poll_service(&mut service).await; + tokio::time::sleep(KEEP_ALIVE_TIMEOUT).await; + poll_service(&mut service).await; + + assert_eq!(service.keep_alive_tracker.last_activity.len(), 0); + + // The connection had no substream activity for `KEEP_ALIVE_TIMEOUT` seconds. + // Verify the connection is downgraded. + match service.connections.get(&peer) { + Some(context) => { + assert_eq!( + context.primary.connection_id(), + &ConnectionId::from(1337usize) + ); + assert!(!context.primary.is_active()); + assert!(context.secondary.is_none()); + } + None => panic!("expected {peer} to exist"), + } + } + + #[tokio::test] + async fn downgraded_connection_without_substreams_is_closed() { + let _ = tracing_subscriber::fmt() + .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) + .try_init(); + + let (mut service, sender, _) = transport_service(); + let peer = PeerId::random(); + + // register first connection + let (cmd_tx1, mut cmd_rx1) = channel(64); + sender + .send(InnerTransportEvent::ConnectionEstablished { + peer, + connection: ConnectionId::from(1337usize), + endpoint: Endpoint::dialer(Multiaddr::empty(), ConnectionId::from(1337usize)), + sender: ConnectionHandle::new(ConnectionId::from(1337usize), cmd_tx1), + }) + .await + .unwrap(); + + if let Some(TransportEvent::ConnectionEstablished { + peer: connected_peer, + endpoint, + }) = service.next().await + { + assert_eq!(connected_peer, peer); + assert_eq!(endpoint.address(), &Multiaddr::empty()); + } else { + panic!("expected event from `TransportService`"); + }; + + // verify the first connection state is correct + assert_eq!(service.keep_alive_tracker.last_activity.len(), 1); + match service.connections.get(&peer) { + Some(context) => { + assert_eq!( + context.primary.connection_id(), + &ConnectionId::from(1337usize) + ); + // Check the connection is still active. + assert!(context.primary.is_active()); + assert!(context.secondary.is_none()); + } + None => panic!("expected {peer} to exist"), + } + + // Open substreams to the peer. + let substream_id = service.open_substream(peer).unwrap(); + let second_substream_id = service.open_substream(peer).unwrap(); + + // Simulate keep-alive timeout expiration. + poll_service(&mut service).await; + tokio::time::sleep(KEEP_ALIVE_TIMEOUT + std::time::Duration::from_secs(1)).await; + poll_service(&mut service).await; + + let mut permits = Vec::new(); + + // First substream. + let protocol_command = cmd_rx1.recv().await.unwrap(); + match protocol_command { + ProtocolCommand::OpenSubstream { + protocol, + substream_id: opened_substream_id, + permit, + .. + } => { + assert_eq!(protocol, ProtocolName::from("/notif/1")); + assert_eq!(substream_id, opened_substream_id); + + // Save the substream permit for later. + permits.push(permit); + } + _ => panic!("expected `ProtocolCommand::OpenSubstream`"), + } + + // Second substream. + let protocol_command = cmd_rx1.recv().await.unwrap(); + match protocol_command { + ProtocolCommand::OpenSubstream { + protocol, + substream_id: opened_substream_id, + permit, + .. + } => { + assert_eq!(protocol, ProtocolName::from("/notif/1")); + assert_eq!(second_substream_id, opened_substream_id); + + // Save the substream permit for later. + permits.push(permit); + } + _ => panic!("expected `ProtocolCommand::OpenSubstream`"), + } + + // Drop one permit. + let permit = permits.pop(); + // Individual transports like TCP will open a substream + // and then will generate a `SubstreamOpened` event via + // the protocol-set handler. + // + // The substream is used by individual protocols and then + // is closed. This simulates the substream being closed. + drop(permit); + + // Open a new substream to the peer. This will succeed as long as we still have + // one substream open. + let substream_id = service.open_substream(peer).unwrap(); + // Handle the substream. + let protocol_command = cmd_rx1.recv().await.unwrap(); + match protocol_command { + ProtocolCommand::OpenSubstream { + protocol, + substream_id: opened_substream_id, + permit, + .. + } => { + assert_eq!(protocol, ProtocolName::from("/notif/1")); + assert_eq!(substream_id, opened_substream_id); + + // Save the substream permit for later. + permits.push(permit); + } + _ => panic!("expected `ProtocolCommand::OpenSubstream`"), + } + + // Drop all substreams. + drop(permits); + + poll_service(&mut service).await; + tokio::time::sleep(KEEP_ALIVE_TIMEOUT + std::time::Duration::from_secs(1)).await; + poll_service(&mut service).await; + + // Cannot open a new substream because: + // 1. connection was downgraded by keep-alive timeout + // 2. all substreams were dropped. + assert_eq!( + service.open_substream(peer), + Err(SubstreamError::ConnectionClosed) + ); + } + + #[tokio::test] + async fn substream_opening_upgrades_connection_and_resets_keep_alive() { + let _ = tracing_subscriber::fmt() + .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) + .try_init(); + + let (mut service, sender, _) = transport_service(); + let peer = PeerId::random(); + + // register first connection + let (cmd_tx1, mut cmd_rx1) = channel(64); + sender + .send(InnerTransportEvent::ConnectionEstablished { + peer, + connection: ConnectionId::from(1337usize), + endpoint: Endpoint::dialer(Multiaddr::empty(), ConnectionId::from(1337usize)), + sender: ConnectionHandle::new(ConnectionId::from(1337usize), cmd_tx1), + }) + .await + .unwrap(); + + if let Some(TransportEvent::ConnectionEstablished { + peer: connected_peer, + endpoint, + }) = service.next().await + { + assert_eq!(connected_peer, peer); + assert_eq!(endpoint.address(), &Multiaddr::empty()); + } else { + panic!("expected event from `TransportService`"); + }; + + // verify the first connection state is correct + assert_eq!(service.keep_alive_tracker.last_activity.len(), 1); + match service.connections.get(&peer) { + Some(context) => { + assert_eq!( + context.primary.connection_id(), + &ConnectionId::from(1337usize) + ); + // Check the connection is still active. + assert!(context.primary.is_active()); + assert!(context.secondary.is_none()); + } + None => panic!("expected {peer} to exist"), + } + + // Open substreams to the peer. + let substream_id = service.open_substream(peer).unwrap(); + let second_substream_id = service.open_substream(peer).unwrap(); + + let mut permits = Vec::new(); + // First substream. + let protocol_command = cmd_rx1.recv().await.unwrap(); + match protocol_command { + ProtocolCommand::OpenSubstream { + protocol, + substream_id: opened_substream_id, + permit, + .. + } => { + assert_eq!(protocol, ProtocolName::from("/notif/1")); + assert_eq!(substream_id, opened_substream_id); + + // Save the substream permit for later. + permits.push(permit); + } + _ => panic!("expected `ProtocolCommand::OpenSubstream`"), + } + + // Second substream. + let protocol_command = cmd_rx1.recv().await.unwrap(); + match protocol_command { + ProtocolCommand::OpenSubstream { + protocol, + substream_id: opened_substream_id, + permit, + .. + } => { + assert_eq!(protocol, ProtocolName::from("/notif/1")); + assert_eq!(second_substream_id, opened_substream_id); + + // Save the substream permit for later. + permits.push(permit); + } + _ => panic!("expected `ProtocolCommand::OpenSubstream`"), + } + + // Sleep to trigger keep-alive timeout. + poll_service(&mut service).await; + tokio::time::sleep(KEEP_ALIVE_TIMEOUT + std::time::Duration::from_secs(1)).await; + poll_service(&mut service).await; + + // Verify the connection is downgraded. + match service.connections.get(&peer) { + Some(context) => { + assert_eq!( + context.primary.connection_id(), + &ConnectionId::from(1337usize) + ); + // Check the connection is not active. + assert!(!context.primary.is_active()); + assert!(context.secondary.is_none()); + } + None => panic!("expected {peer} to exist"), + } + assert_eq!(service.keep_alive_tracker.last_activity.len(), 0); + + // Open a new substream to the peer. This will succeed as long as we still have + // at least substream permit. + let substream_id = service.open_substream(peer).unwrap(); + let protocol_command = cmd_rx1.recv().await.unwrap(); + match protocol_command { + ProtocolCommand::OpenSubstream { + protocol, + substream_id: opened_substream_id, + permit, + .. + } => { + assert_eq!(protocol, ProtocolName::from("/notif/1")); + assert_eq!(substream_id, opened_substream_id); + + // Save the substream permit for later. + permits.push(permit); + } + _ => panic!("expected `ProtocolCommand::OpenSubstream`"), + } + + poll_service(&mut service).await; + + // Verify the connection is upgraded and keep-alive is tracked. + match service.connections.get(&peer) { + Some(context) => { + assert_eq!( + context.primary.connection_id(), + &ConnectionId::from(1337usize) + ); + // Check the connection is active, because it was upgraded by the last substream. + assert!(context.primary.is_active()); + assert!(context.secondary.is_none()); + } + None => panic!("expected {peer} to exist"), + } + assert_eq!(service.keep_alive_tracker.last_activity.len(), 1); + + // Drop all substreams + drop(permits); + + // The connection is still active, because it was upgraded by the last substream open. + match service.connections.get(&peer) { + Some(context) => { + assert_eq!( + context.primary.connection_id(), + &ConnectionId::from(1337usize) + ); + // Check the connection is active, because it was upgraded by the last substream. + assert!(context.primary.is_active()); + assert!(context.secondary.is_none()); + } + None => panic!("expected {peer} to exist"), + } + assert_eq!(service.keep_alive_tracker.last_activity.len(), 1); + + // Sleep to trigger keep-alive timeout. + poll_service(&mut service).await; + tokio::time::sleep(KEEP_ALIVE_TIMEOUT + std::time::Duration::from_secs(1)).await; + poll_service(&mut service).await; + + match service.connections.get(&peer) { + Some(context) => { + assert_eq!( + context.primary.connection_id(), + &ConnectionId::from(1337usize) + ); + // No longer active because it was downgraded by keep-alive and no + // substream opens were made. + assert!(!context.primary.is_active()); + assert!(context.secondary.is_none()); + } + None => panic!("expected {peer} to exist"), + } + + // Cannot open a new substream because: + // 1. connection was downgraded by keep-alive timeout + // 2. all substreams were dropped. + assert_eq!( + service.open_substream(peer), + Err(SubstreamError::ConnectionClosed) + ); + } + + #[tokio::test] + async fn keep_alive_pop_elements() { + let mut tracker = KeepAliveTracker::new(Duration::from_secs(1)); + + let (peer1, connection1) = (PeerId::random(), ConnectionId::from(1usize)); + let (peer2, connection2) = (PeerId::random(), ConnectionId::from(2usize)); + let added_keys = HashSet::from([(peer1, connection1), (peer2, connection2)]); + + tracker.on_connection_established(peer1, connection1); + tracker.on_connection_established(peer2, connection2); + + tokio::time::sleep(Duration::from_secs(2)).await; + + let key = tracker.next().await.unwrap(); + assert!(added_keys.contains(&key)); + + let key = tracker.next().await.unwrap(); + assert!(added_keys.contains(&key)); + + // No more elements. + assert!(tracker.pending_keep_alive_timeouts.is_empty()); + assert!(tracker.last_activity.is_empty()); + } +} diff --git a/client/litep2p/src/schema/keys.proto b/client/litep2p/src/schema/keys.proto new file mode 100644 index 00000000..5fbeaf8f --- /dev/null +++ b/client/litep2p/src/schema/keys.proto @@ -0,0 +1,20 @@ +syntax = "proto2"; + +package keys_proto; + +enum KeyType { + RSA = 0; + Ed25519 = 1; + Secp256k1 = 2; + ECDSA = 3; +} + +message PublicKey { + required KeyType Type = 1; + required bytes Data = 2; +} + +message PrivateKey { + required KeyType Type = 1; + required bytes Data = 2; +} diff --git a/client/litep2p/src/schema/noise.proto b/client/litep2p/src/schema/noise.proto new file mode 100644 index 00000000..540e80ef --- /dev/null +++ b/client/litep2p/src/schema/noise.proto @@ -0,0 +1,26 @@ +syntax = "proto2"; + +package noise; + +enum KeyType { + RSA = 0; + Ed25519 = 1; + Secp256k1 = 2; + ECDSA = 3; +} + +message Exchange { + optional bytes id = 1; + optional bytes pubkey = 2; +} + +message NoiseExtensions { + repeated bytes webtransport_certhashes = 1; + repeated string stream_muxers = 2; +} + +message NoiseHandshakePayload { + optional bytes identity_key = 1; + optional bytes identity_sig = 2; + optional NoiseExtensions extensions = 4; +} \ No newline at end of file diff --git a/client/litep2p/src/schema/webrtc.proto b/client/litep2p/src/schema/webrtc.proto new file mode 100644 index 00000000..852f3c6c --- /dev/null +++ b/client/litep2p/src/schema/webrtc.proto @@ -0,0 +1,24 @@ +syntax = "proto2"; + +package webrtc; + +message Message { + enum Flag { + // The sender will no longer send messages on the stream. + FIN = 0; + // The sender will no longer read messages on the stream. Incoming data is + // being discarded on receipt. + STOP_SENDING = 1; + // The sender abruptly terminates the sending part of the stream. The + // receiver MAY discard any data that it already received on that stream. + RESET_STREAM = 2; + // Sending the FIN_ACK flag acknowledges the previous receipt of a message + // with the FIN flag set. Receiving a FIN_ACK flag gives the recipient + // confidence that the remote has received all sent messages. + FIN_ACK = 3; + } + + optional Flag flag = 1; + + optional bytes message = 2; +} \ No newline at end of file diff --git a/client/litep2p/src/substream/mod.rs b/client/litep2p/src/substream/mod.rs new file mode 100644 index 00000000..bf39046c --- /dev/null +++ b/client/litep2p/src/substream/mod.rs @@ -0,0 +1,1089 @@ +// Copyright 2020 Parity Technologies (UK) Ltd. +// Copyright 2023 litep2p developers +// +// Permission is hereby granted, free of charge, to any person obtaining a +// copy of this software and associated documentation files (the "Software"), +// to deal in the Software without restriction, including without limitation +// the rights to use, copy, modify, merge, publish, distribute, sublicense, +// and/or sell copies of the Software, and to permit persons to whom the +// Software is furnished to do so, subject to the following conditions: +// +// The above copyright notice and this permission notice shall be included in +// all copies or substantial portions of the Software. +// +// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS +// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE +// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER +// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING +// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER +// DEALINGS IN THE SOFTWARE. + +//! Substream-related helper code. + +use crate::{ + codec::ProtocolCodec, error::SubstreamError, transport::tcp, types::SubstreamId, PeerId, +}; + +#[cfg(feature = "quic")] +use crate::transport::quic; +#[cfg(feature = "webrtc")] +use crate::transport::webrtc; +#[cfg(feature = "websocket")] +use crate::transport::websocket; + +use bytes::{Buf, Bytes, BytesMut}; +use futures::{Sink, Stream}; +use tokio::io::{AsyncRead, AsyncWrite, AsyncWriteExt, ReadBuf}; +use unsigned_varint::{decode, encode}; + +use std::{ + collections::{hash_map::Entry, HashMap, VecDeque}, + fmt, + hash::Hash, + io::ErrorKind, + pin::Pin, + task::{Context, Poll}, +}; + +/// Logging target for the file. +const LOG_TARGET: &str = "litep2p::substream"; + +macro_rules! poll_flush { + ($substream:expr, $cx:ident) => {{ + match $substream { + SubstreamType::Tcp(substream) => Pin::new(substream).poll_flush($cx), + #[cfg(feature = "websocket")] + SubstreamType::WebSocket(substream) => Pin::new(substream).poll_flush($cx), + #[cfg(feature = "quic")] + SubstreamType::Quic(substream) => Pin::new(substream).poll_flush($cx), + #[cfg(feature = "webrtc")] + SubstreamType::WebRtc(substream) => Pin::new(substream).poll_flush($cx), + #[cfg(test)] + SubstreamType::Mock(_) => unreachable!(), + } + }}; +} + +macro_rules! poll_write { + ($substream:expr, $cx:ident, $frame:expr) => {{ + match $substream { + SubstreamType::Tcp(substream) => Pin::new(substream).poll_write($cx, $frame), + #[cfg(feature = "websocket")] + SubstreamType::WebSocket(substream) => Pin::new(substream).poll_write($cx, $frame), + #[cfg(feature = "quic")] + SubstreamType::Quic(substream) => Pin::new(substream).poll_write($cx, $frame), + #[cfg(feature = "webrtc")] + SubstreamType::WebRtc(substream) => Pin::new(substream).poll_write($cx, $frame), + #[cfg(test)] + SubstreamType::Mock(_) => unreachable!(), + } + }}; +} + +macro_rules! poll_read { + ($substream:expr, $cx:ident, $buffer:expr) => {{ + match $substream { + SubstreamType::Tcp(substream) => Pin::new(substream).poll_read($cx, $buffer), + #[cfg(feature = "websocket")] + SubstreamType::WebSocket(substream) => Pin::new(substream).poll_read($cx, $buffer), + #[cfg(feature = "quic")] + SubstreamType::Quic(substream) => Pin::new(substream).poll_read($cx, $buffer), + #[cfg(feature = "webrtc")] + SubstreamType::WebRtc(substream) => Pin::new(substream).poll_read($cx, $buffer), + #[cfg(test)] + SubstreamType::Mock(_) => unreachable!(), + } + }}; +} + +macro_rules! poll_shutdown { + ($substream:expr, $cx:ident) => {{ + match $substream { + SubstreamType::Tcp(substream) => Pin::new(substream).poll_shutdown($cx), + #[cfg(feature = "websocket")] + SubstreamType::WebSocket(substream) => Pin::new(substream).poll_shutdown($cx), + #[cfg(feature = "quic")] + SubstreamType::Quic(substream) => Pin::new(substream).poll_shutdown($cx), + #[cfg(feature = "webrtc")] + SubstreamType::WebRtc(substream) => Pin::new(substream).poll_shutdown($cx), + #[cfg(test)] + SubstreamType::Mock(substream) => { + let _ = Pin::new(substream).poll_close($cx); + todo!(); + } + } + }}; +} + +macro_rules! delegate_poll_next { + ($substream:expr, $cx:ident) => {{ + #[cfg(test)] + if let SubstreamType::Mock(inner) = $substream { + return Pin::new(inner).poll_next($cx); + } + }}; +} + +macro_rules! delegate_poll_ready { + ($substream:expr, $cx:ident) => {{ + #[cfg(test)] + if let SubstreamType::Mock(inner) = $substream { + return Pin::new(inner).poll_ready($cx); + } + }}; +} + +macro_rules! delegate_start_send { + ($substream:expr, $item:ident) => {{ + #[cfg(test)] + if let SubstreamType::Mock(inner) = $substream { + return Pin::new(inner).start_send($item); + } + }}; +} + +macro_rules! delegate_poll_flush { + ($substream:expr, $cx:ident) => {{ + #[cfg(test)] + if let SubstreamType::Mock(inner) = $substream { + return Pin::new(inner).poll_flush($cx); + } + }}; +} + +macro_rules! check_size { + ($max_size:expr, $size:expr) => {{ + if let Some(max_size) = $max_size { + if $size > max_size { + return Err(SubstreamError::IoError(ErrorKind::PermissionDenied).into()); + } + } + }}; +} + +/// Substream type. +enum SubstreamType { + Tcp(tcp::Substream), + #[cfg(feature = "websocket")] + WebSocket(websocket::Substream), + #[cfg(feature = "quic")] + Quic(quic::Substream), + #[cfg(feature = "webrtc")] + WebRtc(webrtc::Substream), + #[cfg(test)] + Mock(Box), +} + +impl fmt::Debug for SubstreamType { + fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { + match self { + Self::Tcp(_) => write!(f, "Tcp"), + #[cfg(feature = "websocket")] + Self::WebSocket(_) => write!(f, "WebSocket"), + #[cfg(feature = "quic")] + Self::Quic(_) => write!(f, "Quic"), + #[cfg(feature = "webrtc")] + Self::WebRtc(_) => write!(f, "WebRtc"), + #[cfg(test)] + Self::Mock(_) => write!(f, "Mock"), + } + } +} + +/// Backpressure boundary for `Sink`. +const BACKPRESSURE_BOUNDARY: usize = 65536; + +/// `Litep2p` substream type. +/// +/// Implements [`tokio::io::AsyncRead`]/[`tokio::io::AsyncWrite`] traits which can be wrapped +/// in a `Framed` to implement a custom codec. +/// +/// In case a codec for the protocol was specified, +/// [`Sink::send()`](futures::Sink)/[`Stream::next()`](futures::Stream) are also provided which +/// implement the necessary framing to read/write codec-encoded messages from the underlying socket. +pub struct Substream { + /// Remote peer ID. + peer: PeerId, + + // Inner substream. + substream: SubstreamType, + + /// Substream ID. + substream_id: SubstreamId, + + /// Protocol codec. + codec: ProtocolCodec, + + pending_out_frames: VecDeque, + pending_out_bytes: usize, + pending_out_frame: Option, + + read_buffer: BytesMut, + offset: usize, + pending_frames: VecDeque, + current_frame_size: Option, + + size_vec: BytesMut, +} + +impl fmt::Debug for Substream { + fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { + f.debug_struct("Substream") + .field("peer", &self.peer) + .field("substream_id", &self.substream_id) + .field("codec", &self.codec) + .field("protocol", &self.substream) + .finish() + } +} + +impl Substream { + /// Create new [`Substream`]. + fn new( + peer: PeerId, + substream_id: SubstreamId, + substream: SubstreamType, + codec: ProtocolCodec, + ) -> Self { + Self { + peer, + substream, + codec, + substream_id, + read_buffer: BytesMut::zeroed(1024), + offset: 0usize, + pending_frames: VecDeque::new(), + current_frame_size: None, + pending_out_bytes: 0usize, + pending_out_frames: VecDeque::new(), + pending_out_frame: None, + size_vec: BytesMut::zeroed(10), + } + } + + /// Create new [`Substream`] for TCP. + pub(crate) fn new_tcp( + peer: PeerId, + substream_id: SubstreamId, + substream: tcp::Substream, + codec: ProtocolCodec, + ) -> Self { + tracing::trace!(target: LOG_TARGET, ?peer, ?codec, "create new substream for tcp"); + + Self::new(peer, substream_id, SubstreamType::Tcp(substream), codec) + } + + /// Create new [`Substream`] for WebSocket. + #[cfg(feature = "websocket")] + pub(crate) fn new_websocket( + peer: PeerId, + substream_id: SubstreamId, + substream: websocket::Substream, + codec: ProtocolCodec, + ) -> Self { + tracing::trace!(target: LOG_TARGET, ?peer, ?codec, "create new substream for websocket"); + + Self::new( + peer, + substream_id, + SubstreamType::WebSocket(substream), + codec, + ) + } + + /// Create new [`Substream`] for QUIC. + #[cfg(feature = "quic")] + pub(crate) fn new_quic( + peer: PeerId, + substream_id: SubstreamId, + substream: quic::Substream, + codec: ProtocolCodec, + ) -> Self { + tracing::trace!(target: LOG_TARGET, ?peer, ?codec, "create new substream for quic"); + + Self::new(peer, substream_id, SubstreamType::Quic(substream), codec) + } + + /// Create new [`Substream`] for WebRTC. + #[cfg(feature = "webrtc")] + pub(crate) fn new_webrtc( + peer: PeerId, + substream_id: SubstreamId, + substream: webrtc::Substream, + codec: ProtocolCodec, + ) -> Self { + tracing::trace!(target: LOG_TARGET, ?peer, ?codec, "create new substream for webrtc"); + + Self::new(peer, substream_id, SubstreamType::WebRtc(substream), codec) + } + + /// Create new [`Substream`] for mocking. + #[cfg(test)] + pub(crate) fn new_mock( + peer: PeerId, + substream_id: SubstreamId, + substream: Box, + ) -> Self { + tracing::trace!(target: LOG_TARGET, ?peer, "create new substream for mocking"); + + Self::new( + peer, + substream_id, + SubstreamType::Mock(substream), + ProtocolCodec::Unspecified, + ) + } + + /// Close the substream. + pub async fn close(self) { + let _ = match self.substream { + SubstreamType::Tcp(mut substream) => substream.shutdown().await, + #[cfg(feature = "websocket")] + SubstreamType::WebSocket(mut substream) => substream.shutdown().await, + #[cfg(feature = "quic")] + SubstreamType::Quic(mut substream) => substream.shutdown().await, + #[cfg(feature = "webrtc")] + SubstreamType::WebRtc(mut substream) => substream.shutdown().await, + #[cfg(test)] + SubstreamType::Mock(mut substream) => { + let _ = futures::SinkExt::close(&mut substream).await; + Ok(()) + } + }; + } + + /// Send identity payload to remote peer. + async fn send_identity_payload( + io: &mut T, + payload_size: usize, + payload: Bytes, + ) -> Result<(), SubstreamError> { + if payload.len() != payload_size { + return Err(SubstreamError::IoError(ErrorKind::PermissionDenied)); + } + + io.write_all(&payload).await.map_err(|_| SubstreamError::ConnectionClosed)?; + + // Flush the stream. + io.flush().await.map_err(From::from) + } + + /// Send unsigned varint payload to remote peer. + async fn send_unsigned_varint_payload( + io: &mut T, + bytes: Bytes, + max_size: Option, + ) -> Result<(), SubstreamError> { + if let Some(max_size) = max_size { + if bytes.len() > max_size { + return Err(SubstreamError::IoError(ErrorKind::PermissionDenied)); + } + } + + // Write the length of the frame. + let mut buffer = unsigned_varint::encode::usize_buffer(); + let encoded_len = unsigned_varint::encode::usize(bytes.len(), &mut buffer).len(); + io.write_all(&buffer[..encoded_len]).await?; + + // Write the frame. + io.write_all(bytes.as_ref()).await?; + + // Flush the stream. + io.flush().await.map_err(From::from) + } + + /// Send framed data to remote peer. + /// + /// This function may be faster than the provided [`futures::Sink`] implementation for + /// [`Substream`] as it has direct access to the API of the underlying socket as opposed + /// to going through [`tokio::io::AsyncWrite`]. + /// + /// # Cancel safety + /// + /// This method is not cancellation safe. If that is required, use the provided + /// [`futures::Sink`] implementation. + /// + /// # Panics + /// + /// Panics if no codec is provided. + pub async fn send_framed(&mut self, bytes: Bytes) -> Result<(), SubstreamError> { + tracing::trace!( + target: LOG_TARGET, + peer = ?self.peer, + codec = ?self.codec, + frame_len = ?bytes.len(), + "send framed" + ); + + match &mut self.substream { + #[cfg(test)] + SubstreamType::Mock(ref mut substream) => + futures::SinkExt::send(substream, bytes).await, + SubstreamType::Tcp(ref mut substream) => match self.codec { + ProtocolCodec::Unspecified => panic!("codec is unspecified"), + ProtocolCodec::Identity(payload_size) => + Self::send_identity_payload(substream, payload_size, bytes).await, + ProtocolCodec::UnsignedVarint(max_size) => + Self::send_unsigned_varint_payload(substream, bytes, max_size).await, + }, + #[cfg(feature = "websocket")] + SubstreamType::WebSocket(ref mut substream) => match self.codec { + ProtocolCodec::Unspecified => panic!("codec is unspecified"), + ProtocolCodec::Identity(payload_size) => + Self::send_identity_payload(substream, payload_size, bytes).await, + ProtocolCodec::UnsignedVarint(max_size) => + Self::send_unsigned_varint_payload(substream, bytes, max_size).await, + }, + #[cfg(feature = "quic")] + SubstreamType::Quic(ref mut substream) => match self.codec { + ProtocolCodec::Unspecified => panic!("codec is unspecified"), + ProtocolCodec::Identity(payload_size) => + Self::send_identity_payload(substream, payload_size, bytes).await, + ProtocolCodec::UnsignedVarint(max_size) => { + check_size!(max_size, bytes.len()); + + let mut buffer = unsigned_varint::encode::usize_buffer(); + let len = unsigned_varint::encode::usize(bytes.len(), &mut buffer); + let len = BytesMut::from(len); + + substream.write_all_chunks(&mut [len.freeze(), bytes]).await + } + }, + #[cfg(feature = "webrtc")] + SubstreamType::WebRtc(ref mut substream) => match self.codec { + ProtocolCodec::Unspecified => panic!("codec is unspecified"), + ProtocolCodec::Identity(payload_size) => + Self::send_identity_payload(substream, payload_size, bytes).await, + ProtocolCodec::UnsignedVarint(max_size) => + Self::send_unsigned_varint_payload(substream, bytes, max_size).await, + }, + } + } +} + +impl tokio::io::AsyncRead for Substream { + fn poll_read( + mut self: Pin<&mut Self>, + cx: &mut Context<'_>, + buf: &mut tokio::io::ReadBuf<'_>, + ) -> Poll> { + poll_read!(&mut self.substream, cx, buf) + } +} + +impl tokio::io::AsyncWrite for Substream { + fn poll_write( + mut self: Pin<&mut Self>, + cx: &mut Context<'_>, + buf: &[u8], + ) -> Poll> { + poll_write!(&mut self.substream, cx, buf) + } + + fn poll_flush( + mut self: Pin<&mut Self>, + cx: &mut Context<'_>, + ) -> Poll> { + poll_flush!(&mut self.substream, cx) + } + + fn poll_shutdown( + mut self: Pin<&mut Self>, + cx: &mut Context<'_>, + ) -> Poll> { + poll_shutdown!(&mut self.substream, cx) + } +} + +enum ReadError { + Overflow, + NotEnoughBytes, + DecodeError, +} + +// Return the payload size and the number of bytes it took to encode it +fn read_payload_size(buffer: &[u8]) -> Result<(usize, usize), ReadError> { + let max_len = encode::usize_buffer().len(); + + for i in 0..std::cmp::min(buffer.len(), max_len) { + if decode::is_last(buffer[i]) { + match decode::usize(&buffer[..=i]) { + Err(_) => return Err(ReadError::DecodeError), + Ok(size) => return Ok((size.0, i + 1)), + } + } + } + + match buffer.len() < max_len { + true => Err(ReadError::NotEnoughBytes), + false => Err(ReadError::Overflow), + } +} + +impl Stream for Substream { + type Item = Result; + + fn poll_next(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll> { + let this = Pin::into_inner(self); + + // `MockSubstream` implements `Stream` so calls to `poll_next()` must be delegated + delegate_poll_next!(&mut this.substream, cx); + + loop { + match this.codec { + ProtocolCodec::Identity(payload_size) => { + let mut read_buf = + ReadBuf::new(&mut this.read_buffer[this.offset..payload_size]); + + match futures::ready!(poll_read!(&mut this.substream, cx, &mut read_buf)) { + Ok(_) => { + let nread = read_buf.filled().len(); + if nread == 0 { + tracing::trace!( + target: LOG_TARGET, + peer = ?this.peer, + "read zero bytes, substream closed" + ); + return Poll::Ready(None); + } + + this.offset = this.offset.saturating_add(nread); + + if this.offset == payload_size { + let mut payload = std::mem::replace( + &mut this.read_buffer, + BytesMut::zeroed(payload_size), + ); + payload.truncate(payload_size); + this.offset = 0usize; + + return Poll::Ready(Some(Ok(payload))); + } + } + Err(error) => return Poll::Ready(Some(Err(error.into()))), + } + } + ProtocolCodec::UnsignedVarint(max_size) => { + loop { + // return all pending frames first + if let Some(frame) = this.pending_frames.pop_front() { + return Poll::Ready(Some(Ok(frame))); + } + + match this.current_frame_size.take() { + Some(frame_size) => { + let mut read_buf = + ReadBuf::new(&mut this.read_buffer[this.offset..]); + this.current_frame_size = Some(frame_size); + + match futures::ready!(poll_read!( + &mut this.substream, + cx, + &mut read_buf + )) { + Err(_error) => return Poll::Ready(None), + Ok(_) => { + let nread = match read_buf.filled().len() { + 0 => return Poll::Ready(None), + nread => nread, + }; + + this.offset += nread; + + if this.offset == frame_size { + let out_frame = std::mem::replace( + &mut this.read_buffer, + BytesMut::new(), + ); + this.offset = 0; + this.current_frame_size = None; + + return Poll::Ready(Some(Ok(out_frame))); + } else { + this.current_frame_size = Some(frame_size); + continue; + } + } + } + } + None => { + let mut read_buf = + ReadBuf::new(&mut this.size_vec[this.offset..this.offset + 1]); + + match futures::ready!(poll_read!( + &mut this.substream, + cx, + &mut read_buf + )) { + Err(_error) => return Poll::Ready(None), + Ok(_) => { + if read_buf.filled().is_empty() { + return Poll::Ready(None); + } + this.offset += 1; + + match read_payload_size(&this.size_vec[..this.offset]) { + Err(ReadError::NotEnoughBytes) => continue, + Err(_) => + return Poll::Ready(Some(Err( + SubstreamError::ReadFailure(Some( + this.substream_id, + )), + ))), + Ok((size, num_bytes)) => { + debug_assert_eq!(num_bytes, this.offset); + + if let Some(max_size) = max_size { + if size > max_size { + return Poll::Ready(Some(Err( + SubstreamError::ReadFailure(Some( + this.substream_id, + )), + ))); + } + } + + this.offset = 0; + // Handle empty payloads detected as 0-length frame. + // The offset must be cleared to 0 to not interfere + // with next framing. + if size == 0 { + return Poll::Ready(Some(Ok(BytesMut::new()))); + } + + this.current_frame_size = Some(size); + this.read_buffer = BytesMut::zeroed(size); + } + } + } + } + } + } + } + } + ProtocolCodec::Unspecified => panic!("codec is unspecified"), + } + } + } +} + +// TODO: https://github.com/paritytech/litep2p/issues/341 this code can definitely be optimized +impl Sink for Substream { + type Error = SubstreamError; + + fn poll_ready(mut self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll> { + // `MockSubstream` implements `Sink` so calls to `poll_ready()` must be delegated + delegate_poll_ready!(&mut self.substream, cx); + + if self.pending_out_bytes >= BACKPRESSURE_BOUNDARY { + // This attempts to empty 'pending_out_frames' into the socket. + match futures::Sink::poll_flush(self.as_mut(), cx) { + Poll::Ready(Ok(())) => {} + Poll::Ready(Err(e)) => return Poll::Ready(Err(e)), + Poll::Pending => { + // Still flushing. We cannot accept new data yet. + return Poll::Pending; + } + } + } + + Poll::Ready(Ok(())) + } + + fn start_send(mut self: Pin<&mut Self>, item: Bytes) -> Result<(), Self::Error> { + // `MockSubstream` implements `Sink` so calls to `start_send()` must be delegated + delegate_start_send!(&mut self.substream, item); + + tracing::trace!( + target: LOG_TARGET, + peer = ?self.peer, + substream_id = ?self.substream_id, + data_len = item.len(), + "Substream::start_send()", + ); + + match self.codec { + ProtocolCodec::Identity(payload_size) => { + if item.len() != payload_size { + return Err(SubstreamError::IoError(ErrorKind::PermissionDenied)); + } + + self.pending_out_bytes += item.len(); + self.pending_out_frames.push_back(item); + } + ProtocolCodec::UnsignedVarint(max_size) => { + check_size!(max_size, item.len()); + + let len = { + let mut buffer = unsigned_varint::encode::usize_buffer(); + let len = unsigned_varint::encode::usize(item.len(), &mut buffer); + BytesMut::from(len) + }; + + self.pending_out_bytes += len.len() + item.len(); + self.pending_out_frames.push_back(len.freeze()); + self.pending_out_frames.push_back(item); + } + ProtocolCodec::Unspecified => panic!("codec is unspecified"), + } + + Ok(()) + } + + fn poll_flush(mut self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll> { + // `MockSubstream` implements `Sink` so calls to `poll_flush()` must be delegated + delegate_poll_flush!(&mut self.substream, cx); + + loop { + let mut pending_frame = match self.pending_out_frame.take() { + Some(frame) => frame, + None => match self.pending_out_frames.pop_front() { + Some(frame) => frame, + None => break, + }, + }; + + match poll_write!(&mut self.substream, cx, &pending_frame) { + Poll::Ready(Err(error)) => return Poll::Ready(Err(error.into())), + Poll::Pending => { + self.pending_out_frame = Some(pending_frame); + break; + } + Poll::Ready(Ok(nwritten)) => { + pending_frame.advance(nwritten); + + // The number of pending bytes is reduced by the number of bytes written + // to ensure that backpressure is properly handled. + self.pending_out_bytes = self.pending_out_bytes.saturating_sub(nwritten); + + if !pending_frame.is_empty() { + self.pending_out_frame = Some(pending_frame); + } + } + } + } + + poll_flush!(&mut self.substream, cx).map_err(From::from) + } + + fn poll_close(mut self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll> { + poll_shutdown!(&mut self.substream, cx).map_err(From::from) + } +} + +/// Substream set key. +pub trait SubstreamSetKey: Hash + Unpin + fmt::Debug + PartialEq + Eq + Copy {} + +impl SubstreamSetKey for K {} + +/// Substream set. +// TODO: https://github.com/paritytech/litep2p/issues/342 remove this. +#[derive(Debug, Default)] +pub struct SubstreamSet +where + K: SubstreamSetKey, + S: Stream> + Unpin, +{ + substreams: HashMap, +} + +impl SubstreamSet +where + K: SubstreamSetKey, + S: Stream> + Unpin, +{ + /// Create new [`SubstreamSet`]. + pub fn new() -> Self { + Self { + substreams: HashMap::new(), + } + } + + /// Add new substream to the set. + pub fn insert(&mut self, key: K, substream: S) { + match self.substreams.entry(key) { + Entry::Vacant(entry) => { + entry.insert(substream); + } + Entry::Occupied(_) => { + tracing::error!(?key, "substream already exists"); + debug_assert!(false); + } + } + } + + /// Remove substream from the set. + pub fn remove(&mut self, key: &K) -> Option { + self.substreams.remove(key) + } + + /// Get mutable reference to stored substream. + #[cfg(test)] + pub fn get_mut(&mut self, key: &K) -> Option<&mut S> { + self.substreams.get_mut(key) + } + + /// Get size of [`SubstreamSet`]. + pub fn len(&self) -> usize { + self.substreams.len() + } + + /// Check if [`SubstreamSet`] is empty. + pub fn is_empty(&self) -> bool { + self.substreams.is_empty() + } +} + +impl Stream for SubstreamSet +where + K: SubstreamSetKey, + S: Stream> + Unpin, +{ + type Item = (K, ::Item); + + fn poll_next(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll> { + let inner = Pin::into_inner(self); + + for (key, mut substream) in inner.substreams.iter_mut() { + match Pin::new(&mut substream).poll_next(cx) { + Poll::Pending => continue, + Poll::Ready(Some(data)) => return Poll::Ready(Some((*key, data))), + Poll::Ready(None) => + return Poll::Ready(Some((*key, Err(SubstreamError::ConnectionClosed)))), + } + } + + Poll::Pending + } +} + +#[cfg(test)] +mod tests { + use super::*; + use crate::{mock::substream::MockSubstream, PeerId}; + use futures::{SinkExt, StreamExt}; + + #[test] + fn add_substream() { + let mut set = SubstreamSet::::new(); + + let peer = PeerId::random(); + let substream = MockSubstream::new(); + set.insert(peer, substream); + + let peer = PeerId::random(); + let substream = MockSubstream::new(); + set.insert(peer, substream); + } + + #[test] + #[should_panic] + #[cfg(debug_assertions)] + fn add_same_peer_twice() { + let mut set = SubstreamSet::::new(); + + let peer = PeerId::random(); + let substream1 = MockSubstream::new(); + let substream2 = MockSubstream::new(); + + set.insert(peer, substream1); + set.insert(peer, substream2); + } + + #[test] + fn remove_substream() { + let mut set = SubstreamSet::::new(); + + let peer1 = PeerId::random(); + let substream1 = MockSubstream::new(); + set.insert(peer1, substream1); + + let peer2 = PeerId::random(); + let substream2 = MockSubstream::new(); + set.insert(peer2, substream2); + + assert!(set.remove(&peer1).is_some()); + assert!(set.remove(&peer2).is_some()); + assert!(set.remove(&PeerId::random()).is_none()); + } + + #[tokio::test] + async fn poll_data_from_substream() { + let mut set = SubstreamSet::::new(); + + let peer = PeerId::random(); + let mut substream = MockSubstream::new(); + substream + .expect_poll_next() + .times(1) + .return_once(|_| Poll::Ready(Some(Ok(BytesMut::from(&b"hello"[..]))))); + substream + .expect_poll_next() + .times(1) + .return_once(|_| Poll::Ready(Some(Ok(BytesMut::from(&b"world"[..]))))); + substream.expect_poll_next().returning(|_| Poll::Pending); + set.insert(peer, substream); + + let value = set.next().await.unwrap(); + assert_eq!(value.0, peer); + assert_eq!(value.1.unwrap(), BytesMut::from(&b"hello"[..])); + + let value = set.next().await.unwrap(); + assert_eq!(value.0, peer); + assert_eq!(value.1.unwrap(), BytesMut::from(&b"world"[..])); + + assert!(futures::poll!(set.next()).is_pending()); + } + + #[tokio::test] + async fn substream_closed() { + let mut set = SubstreamSet::::new(); + + let peer = PeerId::random(); + let mut substream = MockSubstream::new(); + substream + .expect_poll_next() + .times(1) + .return_once(|_| Poll::Ready(Some(Ok(BytesMut::from(&b"hello"[..]))))); + substream.expect_poll_next().times(1).return_once(|_| Poll::Ready(None)); + substream.expect_poll_next().returning(|_| Poll::Pending); + set.insert(peer, substream); + + let value = set.next().await.unwrap(); + assert_eq!(value.0, peer); + assert_eq!(value.1.unwrap(), BytesMut::from(&b"hello"[..])); + + match set.next().await { + Some((exited_peer, Err(SubstreamError::ConnectionClosed))) => { + assert_eq!(peer, exited_peer); + } + _ => panic!("inavlid event received"), + } + } + + #[tokio::test] + async fn get_mut_substream() { + let _ = tracing_subscriber::fmt() + .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) + .try_init(); + + let mut set = SubstreamSet::::new(); + + let peer = PeerId::random(); + let mut substream = MockSubstream::new(); + substream + .expect_poll_next() + .times(1) + .return_once(|_| Poll::Ready(Some(Ok(BytesMut::from(&b"hello"[..]))))); + substream.expect_poll_ready().times(1).return_once(|_| Poll::Ready(Ok(()))); + substream.expect_start_send().times(1).return_once(|_| Ok(())); + substream.expect_poll_flush().times(1).return_once(|_| Poll::Ready(Ok(()))); + substream + .expect_poll_next() + .times(1) + .return_once(|_| Poll::Ready(Some(Ok(BytesMut::from(&b"world"[..]))))); + substream.expect_poll_next().returning(|_| Poll::Pending); + set.insert(peer, substream); + + let value = set.next().await.unwrap(); + assert_eq!(value.0, peer); + assert_eq!(value.1.unwrap(), BytesMut::from(&b"hello"[..])); + + let substream = set.get_mut(&peer).unwrap(); + substream.send(vec![1, 2, 3, 4].into()).await.unwrap(); + + let value = set.next().await.unwrap(); + assert_eq!(value.0, peer); + assert_eq!(value.1.unwrap(), BytesMut::from(&b"world"[..])); + + // try to get non-existent substream + assert!(set.get_mut(&PeerId::random()).is_none()); + } + + #[tokio::test] + async fn poll_data_from_two_substreams() { + let mut set = SubstreamSet::::new(); + + // prepare first substream + let peer1 = PeerId::random(); + let mut substream1 = MockSubstream::new(); + substream1 + .expect_poll_next() + .times(1) + .return_once(|_| Poll::Ready(Some(Ok(BytesMut::from(&b"hello"[..]))))); + substream1 + .expect_poll_next() + .times(1) + .return_once(|_| Poll::Ready(Some(Ok(BytesMut::from(&b"world"[..]))))); + substream1.expect_poll_next().returning(|_| Poll::Pending); + set.insert(peer1, substream1); + + // prepare second substream + let peer2 = PeerId::random(); + let mut substream2 = MockSubstream::new(); + substream2 + .expect_poll_next() + .times(1) + .return_once(|_| Poll::Ready(Some(Ok(BytesMut::from(&b"siip"[..]))))); + substream2 + .expect_poll_next() + .times(1) + .return_once(|_| Poll::Ready(Some(Ok(BytesMut::from(&b"huup"[..]))))); + substream2.expect_poll_next().returning(|_| Poll::Pending); + set.insert(peer2, substream2); + + let expected: Vec> = vec![ + vec![ + (peer1, BytesMut::from(&b"hello"[..])), + (peer1, BytesMut::from(&b"world"[..])), + (peer2, BytesMut::from(&b"siip"[..])), + (peer2, BytesMut::from(&b"huup"[..])), + ], + vec![ + (peer1, BytesMut::from(&b"hello"[..])), + (peer2, BytesMut::from(&b"siip"[..])), + (peer1, BytesMut::from(&b"world"[..])), + (peer2, BytesMut::from(&b"huup"[..])), + ], + vec![ + (peer2, BytesMut::from(&b"siip"[..])), + (peer2, BytesMut::from(&b"huup"[..])), + (peer1, BytesMut::from(&b"hello"[..])), + (peer1, BytesMut::from(&b"world"[..])), + ], + vec![ + (peer1, BytesMut::from(&b"hello"[..])), + (peer2, BytesMut::from(&b"siip"[..])), + (peer2, BytesMut::from(&b"huup"[..])), + (peer1, BytesMut::from(&b"world"[..])), + ], + ]; + + // poll values + let mut values = Vec::new(); + + for _ in 0..4 { + let value = set.next().await.unwrap(); + values.push((value.0, value.1.unwrap())); + } + + let mut correct_found = false; + + for set in expected { + if values == set { + correct_found = true; + break; + } + } + + if !correct_found { + panic!("invalid set generated"); + } + + // rest of the calls return `Poll::Pending` + for _ in 0..10 { + assert!(futures::poll!(set.next()).is_pending()); + } + } +} diff --git a/client/litep2p/src/transport/common/listener.rs b/client/litep2p/src/transport/common/listener.rs new file mode 100644 index 00000000..856b4c19 --- /dev/null +++ b/client/litep2p/src/transport/common/listener.rs @@ -0,0 +1,753 @@ +// Copyright 2024 litep2p developers +// +// Permission is hereby granted, free of charge, to any person obtaining a +// copy of this software and associated documentation files (the "Software"), +// to deal in the Software without restriction, including without limitation +// the rights to use, copy, modify, merge, publish, distribute, sublicense, +// and/or sell copies of the Software, and to permit persons to whom the +// Software is furnished to do so, subject to the following conditions: +// +// The above copyright notice and this permission notice shall be included in +// all copies or substantial portions of the Software. +// +// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS +// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE +// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER +// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING +// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER +// DEALINGS IN THE SOFTWARE. + +//! Shared socket listener between TCP and WebSocket. + +use crate::{ + error::{AddressError, DnsError}, + PeerId, +}; + +use futures::Stream; +use hickory_resolver::TokioResolver; +use multiaddr::{Multiaddr, Protocol}; +use network_interface::{Addr, NetworkInterface, NetworkInterfaceConfig}; +use socket2::{Domain, Socket, Type}; +use tokio::net::{TcpListener as TokioTcpListener, TcpStream}; + +use std::{ + io, + net::{IpAddr, Ipv4Addr, Ipv6Addr, SocketAddr}, + pin::Pin, + sync::Arc, + task::{Context, Poll}, +}; + +/// Logging target for the file. +const LOG_TARGET: &str = "litep2p::transport::listener"; + +/// Address type. +#[derive(Debug)] +pub enum AddressType { + /// Socket address. + Socket(SocketAddr), + + /// DNS address. + Dns { + address: String, + port: u16, + dns_type: DnsType, + }, +} + +/// The DNS type of the address. +#[derive(Debug, Clone, Copy, PartialEq, Eq)] +pub enum DnsType { + /// DNS supports both IPv4 and IPv6. + Dns, + /// DNS supports only IPv4. + Dns4, + /// DNS supports only IPv6. + Dns6, +} + +impl AddressType { + /// Resolve the address to a concrete IP. + pub async fn lookup_ip(self, resolver: Arc) -> Result { + let (url, port, dns_type) = match self { + // We already have the IP address. + AddressType::Socket(address) => return Ok(address), + AddressType::Dns { + address, + port, + dns_type, + } => (address, port, dns_type), + }; + + let lookup = match resolver.lookup_ip(url.clone()).await { + Ok(lookup) => lookup, + Err(error) => { + tracing::debug!( + target: LOG_TARGET, + ?error, + "failed to resolve DNS address `{}`", + url + ); + + return Err(DnsError::ResolveError(url)); + } + }; + + let Some(ip) = lookup.iter().find(|ip| match dns_type { + DnsType::Dns => true, + DnsType::Dns4 => ip.is_ipv4(), + DnsType::Dns6 => ip.is_ipv6(), + }) else { + tracing::debug!( + target: LOG_TARGET, + "Multiaddr DNS type does not match IP version `{}`", + url + ); + return Err(DnsError::IpVersionMismatch); + }; + + Ok(SocketAddr::new(ip, port)) + } +} + +/// Local addresses to use for outbound connections. +#[derive(Clone, Default)] +pub enum DialAddresses { + /// Reuse port from listen addresses. + Reuse { + listen_addresses: Arc>, + }, + /// Do not reuse port. + #[default] + NoReuse, +} + +impl DialAddresses { + /// Get local dial address for an outbound connection. + pub fn local_dial_address(&self, remote_address: &IpAddr) -> Result, ()> { + match self { + DialAddresses::Reuse { listen_addresses } => { + for address in listen_addresses.iter() { + if remote_address.is_ipv4() == address.is_ipv4() + && remote_address.is_loopback() == address.ip().is_loopback() + { + if remote_address.is_ipv4() { + return Ok(Some(SocketAddr::new( + IpAddr::V4(Ipv4Addr::UNSPECIFIED), + address.port(), + ))); + } else { + return Ok(Some(SocketAddr::new( + IpAddr::V6(Ipv6Addr::UNSPECIFIED), + address.port(), + ))); + } + } + } + + Err(()) + } + DialAddresses::NoReuse => Ok(None), + } + } +} + +/// Socket listening to zero or more addresses. +pub struct SocketListener { + /// Listeners. + listeners: Vec, + /// The index in the listeners from which the polling is resumed. + poll_index: usize, +} + +/// Trait to convert between `Multiaddr` and `SocketAddr`. +pub trait GetSocketAddr { + /// Convert `Multiaddr` to `SocketAddr`. + /// + /// # Note + /// + /// This method is called from two main code paths: + /// - When creating a new `SocketListener` to bind to a specific address. + /// - When dialing a new connection to a remote address. + /// + /// The `AddressType` is either `SocketAddr` or a `Dns` address. + /// For the `Dns` the concrete IP address is resolved later in our code. + /// + /// The `PeerId` is optional and may not be present. + fn multiaddr_to_socket_address( + address: &Multiaddr, + ) -> Result<(AddressType, Option), AddressError>; + + /// Convert concrete `SocketAddr` to `Multiaddr`. + fn socket_address_to_multiaddr(address: &SocketAddr) -> Multiaddr; +} + +/// TCP helper to convert between `Multiaddr` and `SocketAddr`. +pub struct TcpAddress; + +impl GetSocketAddr for TcpAddress { + fn multiaddr_to_socket_address( + address: &Multiaddr, + ) -> Result<(AddressType, Option), AddressError> { + multiaddr_to_socket_address(address, SocketListenerType::Tcp) + } + + fn socket_address_to_multiaddr(address: &SocketAddr) -> Multiaddr { + Multiaddr::empty() + .with(Protocol::from(address.ip())) + .with(Protocol::Tcp(address.port())) + } +} + +/// WebSocket helper to convert between `Multiaddr` and `SocketAddr`. +#[cfg(feature = "websocket")] +pub struct WebSocketAddress; + +#[cfg(feature = "websocket")] +impl GetSocketAddr for WebSocketAddress { + fn multiaddr_to_socket_address( + address: &Multiaddr, + ) -> Result<(AddressType, Option), AddressError> { + multiaddr_to_socket_address(address, SocketListenerType::WebSocket) + } + + fn socket_address_to_multiaddr(address: &SocketAddr) -> Multiaddr { + Multiaddr::empty() + .with(Protocol::from(address.ip())) + .with(Protocol::Tcp(address.port())) + .with(Protocol::Ws(std::borrow::Cow::Borrowed("/"))) + } +} + +impl SocketListener { + /// Create new [`SocketListener`] + pub fn new( + addresses: Vec, + reuse_port: bool, + nodelay: bool, + ) -> (Self, Vec, DialAddresses) { + let (listeners, listen_addresses): (_, Vec>) = addresses + .into_iter() + .filter_map(|address| { + let address = match T::multiaddr_to_socket_address(&address).ok()?.0 { + AddressType::Dns { address, port, .. } => { + tracing::debug!( + target: LOG_TARGET, + ?address, + ?port, + "dns not supported as bind address" + ); + + return None; + } + AddressType::Socket(address) => address, + }; + + let socket = if address.is_ipv4() { + Socket::new(Domain::IPV4, Type::STREAM, Some(socket2::Protocol::TCP)).ok()? + } else { + let socket = + Socket::new(Domain::IPV6, Type::STREAM, Some(socket2::Protocol::TCP)) + .ok()?; + socket.set_only_v6(true).ok()?; + socket + }; + + socket.set_nodelay(nodelay).ok()?; + socket.set_nonblocking(true).ok()?; + socket.set_reuse_address(true).ok()?; + #[cfg(unix)] + if reuse_port { + socket.set_reuse_port(true).ok()?; + } + socket.bind(&address.into()).ok()?; + socket.listen(1024).ok()?; + + let socket: std::net::TcpListener = socket.into(); + let listener = TokioTcpListener::from_std(socket).ok()?; + let local_address = listener.local_addr().ok()?; + + let listen_addresses = if address.ip().is_unspecified() { + match NetworkInterface::show() { + Ok(ifaces) => ifaces + .into_iter() + .flat_map(|record| { + record.addr.into_iter().filter_map(|iface_address| { + match (iface_address, address.is_ipv4()) { + (Addr::V4(inner), true) => Some(SocketAddr::new( + IpAddr::V4(inner.ip), + local_address.port(), + )), + (Addr::V6(inner), false) => { + match inner.ip.segments().first() { + Some(0xfe80) => None, + _ => Some(SocketAddr::new( + IpAddr::V6(inner.ip), + local_address.port(), + )), + } + } + _ => None, + } + }) + }) + .collect(), + Err(error) => { + tracing::warn!( + target: LOG_TARGET, + ?error, + "failed to fetch network interfaces", + ); + + return None; + } + } + } else { + vec![local_address] + }; + + Some((listener, listen_addresses)) + }) + .unzip(); + + let listen_addresses = listen_addresses.into_iter().flatten().collect::>(); + let listen_multi_addresses = + listen_addresses.iter().map(T::socket_address_to_multiaddr).collect(); + + let dial_addresses = if reuse_port { + DialAddresses::Reuse { + listen_addresses: Arc::new(listen_addresses), + } + } else { + DialAddresses::NoReuse + }; + + ( + Self { + listeners, + poll_index: 0, + }, + listen_multi_addresses, + dial_addresses, + ) + } +} + +/// The type of the socket listener. +#[derive(Clone, Copy, PartialEq, Eq)] +enum SocketListenerType { + /// Listener for TCP. + Tcp, + /// Listener for WebSocket. + #[cfg(feature = "websocket")] + WebSocket, +} + +/// Extract socket address and `PeerId`, if found, from `address`. +fn multiaddr_to_socket_address( + address: &Multiaddr, + ty: SocketListenerType, +) -> Result<(AddressType, Option), AddressError> { + tracing::trace!(target: LOG_TARGET, ?address, "parse multi address"); + + let mut iter = address.iter(); + // Small helper to handle DNS types. + let handle_dns_type = + |address: String, dns_type: DnsType, protocol: Option| match protocol { + Some(Protocol::Tcp(port)) => Ok(AddressType::Dns { + address, + port, + dns_type, + }), + protocol => { + tracing::error!( + target: LOG_TARGET, + ?protocol, + "invalid transport protocol, expected `Tcp`", + ); + Err(AddressError::InvalidProtocol) + } + }; + + let socket_address = match iter.next() { + Some(Protocol::Ip6(address)) => match iter.next() { + Some(Protocol::Tcp(port)) => + AddressType::Socket(SocketAddr::new(IpAddr::V6(address), port)), + protocol => { + tracing::error!( + target: LOG_TARGET, + ?protocol, + "invalid transport protocol, expected `Tcp`", + ); + return Err(AddressError::InvalidProtocol); + } + }, + Some(Protocol::Ip4(address)) => match iter.next() { + Some(Protocol::Tcp(port)) => + AddressType::Socket(SocketAddr::new(IpAddr::V4(address), port)), + protocol => { + tracing::error!( + target: LOG_TARGET, + ?protocol, + "invalid transport protocol, expected `Tcp`", + ); + return Err(AddressError::InvalidProtocol); + } + }, + Some(Protocol::Dns(address)) => handle_dns_type(address.into(), DnsType::Dns, iter.next())?, + Some(Protocol::Dns4(address)) => + handle_dns_type(address.into(), DnsType::Dns4, iter.next())?, + Some(Protocol::Dns6(address)) => + handle_dns_type(address.into(), DnsType::Dns6, iter.next())?, + protocol => { + tracing::error!(target: LOG_TARGET, ?protocol, "invalid transport protocol"); + return Err(AddressError::InvalidProtocol); + } + }; + + match ty { + SocketListenerType::Tcp => (), + #[cfg(feature = "websocket")] + SocketListenerType::WebSocket => { + // verify that `/ws`/`/wss` is part of the multi address + match iter.next() { + Some(Protocol::Ws(_address)) => {} + Some(Protocol::Wss(_address)) => {} + protocol => { + tracing::error!( + target: LOG_TARGET, + ?protocol, + "invalid protocol, expected `Ws` or `Wss`" + ); + return Err(AddressError::InvalidProtocol); + } + }; + } + } + + let maybe_peer = match iter.next() { + Some(Protocol::P2p(multihash)) => + Some(PeerId::from_multihash(multihash).map_err(AddressError::InvalidPeerId)?), + None => None, + protocol => { + tracing::error!( + target: LOG_TARGET, + ?protocol, + "invalid protocol, expected `P2p` or `None`" + ); + return Err(AddressError::InvalidProtocol); + } + }; + + Ok((socket_address, maybe_peer)) +} + +impl Stream for SocketListener { + type Item = io::Result<(TcpStream, SocketAddr)>; + + fn poll_next(mut self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll> { + if self.listeners.is_empty() { + return Poll::Pending; + } + + let len = self.listeners.len(); + for index in 0..len { + let current = (self.poll_index + index) % len; + let listener = &mut self.listeners[current]; + + match listener.poll_accept(cx) { + Poll::Pending => {} + Poll::Ready(Err(error)) => { + self.poll_index = (self.poll_index + 1) % len; + return Poll::Ready(Some(Err(error))); + } + Poll::Ready(Ok((stream, address))) => { + self.poll_index = (self.poll_index + 1) % len; + return Poll::Ready(Some(Ok((stream, address)))); + } + } + } + + self.poll_index = (self.poll_index + 1) % len; + Poll::Pending + } +} + +#[cfg(test)] +mod tests { + use super::*; + use futures::StreamExt; + + #[test] + fn parse_multiaddresses_tcp() { + assert!(multiaddr_to_socket_address( + &"/ip6/::1/tcp/8888".parse().expect("valid multiaddress"), + SocketListenerType::Tcp, + ) + .is_ok()); + assert!(multiaddr_to_socket_address( + &"/ip4/127.0.0.1/tcp/8888".parse().expect("valid multiaddress"), + SocketListenerType::Tcp, + ) + .is_ok()); + assert!(multiaddr_to_socket_address( + &"/ip6/::1/tcp/8888/p2p/12D3KooWT2ouvz5uMmCvHJGzAGRHiqDts5hzXR7NdoQ27pGdzp9Q" + .parse() + .expect("valid multiaddress"), + SocketListenerType::Tcp, + ) + .is_ok()); + assert!(multiaddr_to_socket_address( + &"/ip4/127.0.0.1/tcp/8888/p2p/12D3KooWT2ouvz5uMmCvHJGzAGRHiqDts5hzXR7NdoQ27pGdzp9Q" + .parse() + .expect("valid multiaddress"), + SocketListenerType::Tcp, + ) + .is_ok()); + assert!(multiaddr_to_socket_address( + &"/ip6/::1/udp/8888/p2p/12D3KooWT2ouvz5uMmCvHJGzAGRHiqDts5hzXR7NdoQ27pGdzp9Q" + .parse() + .expect("valid multiaddress"), + SocketListenerType::Tcp, + ) + .is_err()); + assert!(multiaddr_to_socket_address( + &"/ip4/127.0.0.1/udp/8888/p2p/12D3KooWT2ouvz5uMmCvHJGzAGRHiqDts5hzXR7NdoQ27pGdzp9Q" + .parse() + .expect("valid multiaddress"), + SocketListenerType::Tcp, + ) + .is_err()); + } + + #[cfg(feature = "websocket")] + #[test] + fn parse_multiaddresses_websocket() { + assert!(multiaddr_to_socket_address( + &"/ip6/::1/tcp/8888/ws".parse().expect("valid multiaddress"), + SocketListenerType::WebSocket, + ) + .is_ok()); + assert!(multiaddr_to_socket_address( + &"/ip4/127.0.0.1/tcp/8888/ws".parse().expect("valid multiaddress"), + SocketListenerType::WebSocket, + ) + .is_ok()); + assert!(multiaddr_to_socket_address( + &"/ip6/::1/tcp/8888/ws/p2p/12D3KooWT2ouvz5uMmCvHJGzAGRHiqDts5hzXR7NdoQ27pGdzp9Q" + .parse() + .expect("valid multiaddress"), + SocketListenerType::WebSocket, + ) + .is_ok()); + assert!(multiaddr_to_socket_address( + &"/ip4/127.0.0.1/tcp/8888/ws/p2p/12D3KooWT2ouvz5uMmCvHJGzAGRHiqDts5hzXR7NdoQ27pGdzp9Q" + .parse() + .expect("valid multiaddress"), + SocketListenerType::WebSocket, + ) + .is_ok()); + assert!(multiaddr_to_socket_address( + &"/ip6/::1/udp/8888/p2p/12D3KooWT2ouvz5uMmCvHJGzAGRHiqDts5hzXR7NdoQ27pGdzp9Q" + .parse() + .expect("valid multiaddress"), + SocketListenerType::WebSocket, + ) + .is_err()); + assert!(multiaddr_to_socket_address( + &"/ip4/127.0.0.1/udp/8888/p2p/12D3KooWT2ouvz5uMmCvHJGzAGRHiqDts5hzXR7NdoQ27pGdzp9Q" + .parse() + .expect("valid multiaddress"), + SocketListenerType::WebSocket, + ) + .is_err()); + assert!(multiaddr_to_socket_address( + &"/ip4/127.0.0.1/tcp/8888/ws/utp".parse().expect("valid multiaddress"), + SocketListenerType::WebSocket, + ) + .is_err()); + assert!(multiaddr_to_socket_address( + &"/ip6/::1/tcp/8888/p2p/12D3KooWT2ouvz5uMmCvHJGzAGRHiqDts5hzXR7NdoQ27pGdzp9Q" + .parse() + .expect("valid multiaddress"), + SocketListenerType::WebSocket, + ) + .is_err()); + assert!(multiaddr_to_socket_address( + &"/p2p/12D3KooWT2ouvz5uMmCvHJGzAGRHiqDts5hzXR7NdoQ27pGdzp9Q" + .parse() + .expect("valid multiaddress"), + SocketListenerType::WebSocket, + ) + .is_err()); + assert!(multiaddr_to_socket_address( + &"/dns/hello.world/tcp/8888/p2p/12D3KooWT2ouvz5uMmCvHJGzAGRHiqDts5hzXR7NdoQ27pGdzp9Q" + .parse() + .expect("valid multiaddress"), + SocketListenerType::WebSocket, + ) + .is_err()); + assert!(multiaddr_to_socket_address( + &"/dns6/hello.world/tcp/8888/ws/p2p/12D3KooWT2ouvz5uMmCvHJGzAGRHiqDts5hzXR7NdoQ27pGdzp9Q" + .parse() + .expect("valid multiaddress") + ,SocketListenerType::WebSocket, + ) + .is_ok()); + assert!(multiaddr_to_socket_address( + &"/dns4/hello.world/tcp/8888/ws/p2p/12D3KooWT2ouvz5uMmCvHJGzAGRHiqDts5hzXR7NdoQ27pGdzp9Q" + .parse() + .expect("valid multiaddress"), + SocketListenerType::WebSocket, + ) + .is_ok()); + assert!(multiaddr_to_socket_address( + &"/dns6/hello.world/tcp/8888/ws/p2p/12D3KooWT2ouvz5uMmCvHJGzAGRHiqDts5hzXR7NdoQ27pGdzp9Q" + .parse() + .expect("valid multiaddress"), + SocketListenerType::WebSocket, + ) + .is_ok()); + } + + #[tokio::test] + async fn no_listeners_tcp() { + let (mut listener, _, _) = SocketListener::new::(Vec::new(), true, false); + + futures::future::poll_fn(|cx| match listener.poll_next_unpin(cx) { + Poll::Pending => Poll::Ready(()), + event => panic!("unexpected event: {event:?}"), + }) + .await; + } + + #[cfg(feature = "websocket")] + #[tokio::test] + async fn no_listeners_websocket() { + let (mut listener, _, _) = SocketListener::new::(Vec::new(), true, false); + + futures::future::poll_fn(|cx| match listener.poll_next_unpin(cx) { + Poll::Pending => Poll::Ready(()), + event => panic!("unexpected event: {event:?}"), + }) + .await; + } + + #[tokio::test] + async fn one_listener_tcp() { + let address: Multiaddr = "/ip6/::1/tcp/0".parse().unwrap(); + let (mut listener, listen_addresses, _) = + SocketListener::new::(vec![address.clone()], true, false); + + let Some(Protocol::Tcp(port)) = listen_addresses.first().unwrap().clone().iter().nth(1) + else { + panic!("invalid address"); + }; + + let (res1, res2) = + tokio::join!(listener.next(), TcpStream::connect(format!("[::1]:{port}"))); + + assert!(res1.unwrap().is_ok() && res2.is_ok()); + } + + #[cfg(feature = "websocket")] + #[tokio::test] + async fn one_listener_websocket() { + let address: Multiaddr = "/ip6/::1/tcp/0/ws".parse().unwrap(); + let (mut listener, listen_addresses, _) = + SocketListener::new::(vec![address.clone()], true, false); + let Some(Protocol::Tcp(port)) = listen_addresses.first().unwrap().clone().iter().nth(1) + else { + panic!("invalid address"); + }; + + let (res1, res2) = + tokio::join!(listener.next(), TcpStream::connect(format!("[::1]:{port}"))); + + assert!(res1.unwrap().is_ok() && res2.is_ok()); + } + + #[tokio::test] + async fn two_listeners_tcp() { + let address1: Multiaddr = "/ip6/::1/tcp/0".parse().unwrap(); + let address2: Multiaddr = "/ip4/127.0.0.1/tcp/0".parse().unwrap(); + let (mut listener, listen_addresses, _) = + SocketListener::new::(vec![address1, address2], true, false); + let Some(Protocol::Tcp(port1)) = listen_addresses.first().unwrap().clone().iter().nth(1) + else { + panic!("invalid address"); + }; + + let Some(Protocol::Tcp(port2)) = + listen_addresses.iter().nth(1).unwrap().clone().iter().nth(1) + else { + panic!("invalid address"); + }; + + tokio::spawn(async move { while let Some(_) = listener.next().await {} }); + + let (res1, res2) = tokio::join!( + TcpStream::connect(format!("[::1]:{port1}")), + TcpStream::connect(format!("127.0.0.1:{port2}")) + ); + + assert!(res1.is_ok() && res2.is_ok()); + } + + #[cfg(feature = "websocket")] + #[tokio::test] + async fn two_listeners_websocket() { + let address1: Multiaddr = "/ip6/::1/tcp/0/ws".parse().unwrap(); + let address2: Multiaddr = "/ip4/127.0.0.1/tcp/0/ws".parse().unwrap(); + let (mut listener, listen_addresses, _) = + SocketListener::new::(vec![address1, address2], true, false); + + let Some(Protocol::Tcp(port1)) = listen_addresses.first().unwrap().clone().iter().nth(1) + else { + panic!("invalid address"); + }; + + let Some(Protocol::Tcp(port2)) = + listen_addresses.iter().nth(1).unwrap().clone().iter().nth(1) + else { + panic!("invalid address"); + }; + + tokio::spawn(async move { while let Some(_) = listener.next().await {} }); + + let (res1, res2) = tokio::join!( + TcpStream::connect(format!("[::1]:{port1}")), + TcpStream::connect(format!("127.0.0.1:{port2}")) + ); + + assert!(res1.is_ok() && res2.is_ok()); + } + + #[tokio::test] + async fn local_dial_address() { + let dial_addresses = DialAddresses::Reuse { + listen_addresses: Arc::new(vec![ + "[2001:7d0:84aa:3900:2a5d:9e85::]:8888".parse().unwrap(), + "92.168.127.1:9999".parse().unwrap(), + ]), + }; + + assert_eq!( + dial_addresses.local_dial_address(&IpAddr::V4(Ipv4Addr::new(192, 168, 0, 1))), + Ok(Some(SocketAddr::new( + IpAddr::V4(Ipv4Addr::UNSPECIFIED), + 9999 + ))), + ); + + assert_eq!( + dial_addresses.local_dial_address(&IpAddr::V6(Ipv6Addr::new(0, 1, 2, 3, 4, 5, 6, 7))), + Ok(Some(SocketAddr::new( + IpAddr::V6(Ipv6Addr::UNSPECIFIED), + 8888 + ))), + ); + } +} diff --git a/client/litep2p/src/transport/common/mod.rs b/client/litep2p/src/transport/common/mod.rs new file mode 100644 index 00000000..b7dce770 --- /dev/null +++ b/client/litep2p/src/transport/common/mod.rs @@ -0,0 +1,23 @@ +// Copyright 2024 litep2p developers +// +// Permission is hereby granted, free of charge, to any person obtaining a +// copy of this software and associated documentation files (the "Software"), +// to deal in the Software without restriction, including without limitation +// the rights to use, copy, modify, merge, publish, distribute, sublicense, +// and/or sell copies of the Software, and to permit persons to whom the +// Software is furnished to do so, subject to the following conditions: +// +// The above copyright notice and this permission notice shall be included in +// all copies or substantial portions of the Software. +// +// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS +// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE +// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER +// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING +// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER +// DEALINGS IN THE SOFTWARE. + +//! Shared transport protocol implementation + +pub mod listener; diff --git a/client/litep2p/src/transport/dummy.rs b/client/litep2p/src/transport/dummy.rs new file mode 100644 index 00000000..95095344 --- /dev/null +++ b/client/litep2p/src/transport/dummy.rs @@ -0,0 +1,165 @@ +// Copyright 2023 litep2p developers +// +// Permission is hereby granted, free of charge, to any person obtaining a +// copy of this software and associated documentation files (the "Software"), +// to deal in the Software without restriction, including without limitation +// the rights to use, copy, modify, merge, publish, distribute, sublicense, +// and/or sell copies of the Software, and to permit persons to whom the +// Software is furnished to do so, subject to the following conditions: +// +// The above copyright notice and this permission notice shall be included in +// all copies or substantial portions of the Software. +// +// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS +// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE +// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER +// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING +// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER +// DEALINGS IN THE SOFTWARE. + +//! Dummy transport. + +use crate::{ + transport::{Transport, TransportEvent}, + types::ConnectionId, +}; + +use futures::{future::BoxFuture, Stream}; +use multiaddr::Multiaddr; + +use std::{ + collections::VecDeque, + pin::Pin, + task::{Context, Poll}, +}; + +/// Dummy transport. +pub(crate) struct DummyTransport { + /// Events. + events: VecDeque, +} + +impl DummyTransport { + /// Create new [`DummyTransport`]. + pub(crate) fn new() -> Self { + Self { + events: VecDeque::new(), + } + } + + /// Inject event into `DummyTransport`. + pub(crate) fn inject_event(&mut self, event: TransportEvent) { + self.events.push_back(event); + } +} + +impl Stream for DummyTransport { + type Item = TransportEvent; + + fn poll_next(mut self: Pin<&mut Self>, _: &mut Context<'_>) -> Poll> { + if self.events.is_empty() { + return Poll::Pending; + } + + Poll::Ready(self.events.pop_front()) + } +} + +impl Transport for DummyTransport { + fn dial(&mut self, _: ConnectionId, _: Multiaddr) -> crate::Result<()> { + Ok(()) + } + + fn accept(&mut self, _: ConnectionId) -> crate::Result>> { + Ok(Box::pin(async { Ok(()) })) + } + + fn accept_pending(&mut self, _connection_id: ConnectionId) -> crate::Result<()> { + Ok(()) + } + + fn reject_pending(&mut self, _connection_id: ConnectionId) -> crate::Result<()> { + Ok(()) + } + + fn reject(&mut self, _: ConnectionId) -> crate::Result<()> { + Ok(()) + } + + fn open(&mut self, _: ConnectionId, _: Vec) -> crate::Result<()> { + Ok(()) + } + + fn negotiate(&mut self, _: ConnectionId) -> crate::Result<()> { + Ok(()) + } + + /// Cancel opening connections. + fn cancel(&mut self, _: ConnectionId) {} +} + +#[cfg(test)] +mod tests { + use super::*; + use crate::{error::DialError, transport::Endpoint, PeerId}; + use futures::StreamExt; + + #[tokio::test] + async fn pending_event() { + let mut transport = DummyTransport::new(); + + transport.inject_event(TransportEvent::DialFailure { + connection_id: ConnectionId::from(1338usize), + address: Multiaddr::empty(), + error: DialError::Timeout, + }); + + let peer = PeerId::random(); + let endpoint = Endpoint::listener(Multiaddr::empty(), ConnectionId::from(1337usize)); + + transport.inject_event(TransportEvent::ConnectionEstablished { + peer, + endpoint: endpoint.clone(), + }); + + match transport.next().await.unwrap() { + TransportEvent::DialFailure { + connection_id, + address, + .. + } => { + assert_eq!(connection_id, ConnectionId::from(1338usize)); + assert_eq!(address, Multiaddr::empty()); + } + _ => panic!("invalid event"), + } + + match transport.next().await.unwrap() { + TransportEvent::ConnectionEstablished { + peer: event_peer, + endpoint: event_endpoint, + } => { + assert_eq!(peer, event_peer); + assert_eq!(endpoint, event_endpoint); + } + _ => panic!("invalid event"), + } + + futures::future::poll_fn(|cx| match transport.poll_next_unpin(cx) { + Poll::Pending => Poll::Ready(()), + _ => panic!("invalid event"), + }) + .await; + } + + #[test] + fn dummy_handle_connection_states() { + let mut transport = DummyTransport::new(); + + assert!(transport.reject(ConnectionId::new()).is_ok()); + assert!(transport.open(ConnectionId::new(), Vec::new()).is_ok()); + assert!(transport.negotiate(ConnectionId::new()).is_ok()); + transport.cancel(ConnectionId::new()); + } +} diff --git a/client/litep2p/src/transport/manager/address.rs b/client/litep2p/src/transport/manager/address.rs new file mode 100644 index 00000000..a812a4f4 --- /dev/null +++ b/client/litep2p/src/transport/manager/address.rs @@ -0,0 +1,651 @@ +// Copyright 2023 litep2p developers +// +// Permission is hereby granted, free of charge, to any person obtaining a +// copy of this software and associated documentation files (the "Software"), +// to deal in the Software without restriction, including without limitation +// the rights to use, copy, modify, merge, publish, distribute, sublicense, +// and/or sell copies of the Software, and to permit persons to whom the +// Software is furnished to do so, subject to the following conditions: +// +// The above copyright notice and this permission notice shall be included in +// all copies or substantial portions of the Software. +// +// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS +// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE +// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER +// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING +// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER +// DEALINGS IN THE SOFTWARE. + +use crate::{error::DialError, PeerId}; + +use ip_network::IpNetwork; +use multiaddr::{Multiaddr, Protocol}; +use multihash::Multihash; + +use std::collections::{hash_map::Entry, HashMap}; + +/// Maximum number of addresses tracked for a peer. +const MAX_ADDRESSES: usize = 64; + +/// Scores for address records. +pub mod scores { + /// Score indicating that the connection was successfully established. + pub const CONNECTION_ESTABLISHED: i32 = 100i32; + + /// Score for failing to connect due to an invalid or unreachable address. + pub const CONNECTION_FAILURE: i32 = -100i32; + + /// Score for providing an invalid address. + /// + /// This address can never be reached and is effectively banned. + pub const ADDRESS_FAILURE: i32 = i32::MIN; + + /// Initial score for public/global addresses. + /// + /// This gives public addresses a slight priority over private addresses + /// when all addresses are untested (private addresses start at 0). + pub const PUBLIC_ADDRESS_BONUS: i32 = 1i32; +} + +#[allow(clippy::derived_hash_with_manual_eq)] +#[derive(Debug, Clone, Hash)] +pub struct AddressRecord { + /// Address score. + score: i32, + + /// Address. + address: Multiaddr, +} + +impl AsRef for AddressRecord { + fn as_ref(&self) -> &Multiaddr { + &self.address + } +} + +impl AddressRecord { + /// Create new `AddressRecord` and if `address` doesn't contain `P2p`, + /// append the provided `PeerId` to the address. + pub fn new(peer: &PeerId, address: Multiaddr, score: i32) -> Self { + let address = if !std::matches!(address.iter().last(), Some(Protocol::P2p(_))) { + address.with(Protocol::P2p( + Multihash::from_bytes(&peer.to_bytes()).expect("valid peer id"), + )) + } else { + address + }; + + Self::from_raw_multiaddr_with_score(address, score) + } + + /// Create `AddressRecord` from `Multiaddr`. + /// + /// If `address` doesn't contain `PeerId`, return `None` to indicate that this + /// an invalid `Multiaddr` from the perspective of the `TransportManager`. + pub fn from_multiaddr(address: Multiaddr) -> Option { + if !std::matches!(address.iter().last(), Some(Protocol::P2p(_))) { + return None; + } + + Some(Self::from_raw_multiaddr_with_score(address, 0)) + } + + /// Create `AddressRecord` from `Multiaddr`. + /// + /// This method does not check if the address contains `PeerId`. + /// + /// Please consider using [`Self::from_multiaddr`] from the transport manager code. + pub fn from_raw_multiaddr(address: Multiaddr) -> AddressRecord { + Self::from_raw_multiaddr_with_score(address, 0) + } + + /// Create `AddressRecord` from `Multiaddr`. + /// + /// This method does not check if the address contains `PeerId`. + /// + /// Please consider using [`Self::from_multiaddr`] from the transport manager code. + pub fn from_raw_multiaddr_with_score(address: Multiaddr, score: i32) -> AddressRecord { + Self { address, score } + } + + /// Get address score. + #[cfg(test)] + pub fn score(&self) -> i32 { + self.score + } + + /// Get address. + pub fn address(&self) -> &Multiaddr { + &self.address + } + + /// Update score of an address. + pub fn update_score(&mut self, score: i32) { + self.score = score; + } +} + +/// Check if a multiaddr represents a global/public address. +/// +/// DNS addresses are considered potentially public. +fn is_global_multiaddr(address: &Multiaddr) -> bool { + for protocol in address.iter() { + match protocol { + Protocol::Ip4(ip) => return IpNetwork::from(ip).is_global(), + Protocol::Ip6(ip) => return IpNetwork::from(ip).is_global(), + // DNS addresses could resolve to public IPs, treat as potentially public. + // Ideally we need to resolve DNS to check the actual IPs. However, this + // is a more complex operation that requires async DNS resolution in the + // transport manager context / transport layer. + Protocol::Dns(_) | Protocol::Dns4(_) | Protocol::Dns6(_) => return true, + _ => continue, + } + } + + // Consider the address as non-global if no IP or DNS component is found + false +} + +impl PartialEq for AddressRecord { + fn eq(&self, other: &Self) -> bool { + self.score.eq(&other.score) + } +} + +impl Eq for AddressRecord {} + +impl PartialOrd for AddressRecord { + fn partial_cmp(&self, other: &Self) -> Option { + Some(self.cmp(other)) + } +} + +impl Ord for AddressRecord { + fn cmp(&self, other: &Self) -> std::cmp::Ordering { + self.score.cmp(&other.score) + } +} + +/// Store for peer addresses. +#[derive(Debug, Clone, Default)] +pub struct AddressStore { + /// Addresses available. + pub addresses: HashMap, + /// Maximum capacity of the address store. + max_capacity: usize, +} + +impl FromIterator for AddressStore { + fn from_iter>(iter: T) -> Self { + let mut store = AddressStore::new(); + for address in iter { + if let Some(record) = AddressRecord::from_multiaddr(address) { + store.insert(record); + } + } + + store + } +} + +impl FromIterator for AddressStore { + fn from_iter>(iter: T) -> Self { + let mut store = AddressStore::new(); + for record in iter { + store.insert(record); + } + + store + } +} + +impl Extend for AddressStore { + fn extend>(&mut self, iter: T) { + for record in iter { + self.insert(record) + } + } +} + +impl<'a> Extend<&'a AddressRecord> for AddressStore { + fn extend>(&mut self, iter: T) { + for record in iter { + self.insert(record.clone()) + } + } +} + +impl AddressStore { + /// Create new [`AddressStore`]. + pub fn new() -> Self { + Self { + addresses: HashMap::with_capacity(MAX_ADDRESSES), + max_capacity: MAX_ADDRESSES, + } + } + + /// Get the score for a given error. + pub fn error_score(error: &DialError) -> i32 { + match error { + DialError::AddressError(_) => scores::ADDRESS_FAILURE, + _ => scores::CONNECTION_FAILURE, + } + } + + /// Check if [`AddressStore`] is empty. + pub fn is_empty(&self) -> bool { + self.addresses.is_empty() + } + + /// Insert the address record into [`AddressStore`] with the provided score. + /// + /// If the address is not in the store, it will be inserted with a bonus for public addresses. + /// Otherwise, the score will be updated only for connection events (non-zero scores), + /// not for re-adding the same address which should not overwrite connection history. + pub fn insert(&mut self, record: AddressRecord) { + if let Entry::Occupied(mut occupied) = self.addresses.entry(record.address.clone()) { + // Only update score for connection events (non-zero scores). + // Re-adding an address (score 0) via rediscovery should not wipe out + // connection success/failure history. + if record.score != 0 { + occupied.get_mut().update_score(record.score); + } + return; + } + + // Reward public addresses with a bonus. + let is_public = is_global_multiaddr(&record.address); + let record = if is_public { + AddressRecord { + score: record.score.saturating_add(scores::PUBLIC_ADDRESS_BONUS), + ..record + } + } else { + record + }; + + // The eviction algorithm favours addresses with higher scores. + // + // This algorithm has the following implications: + // - it keeps the best addresses in the store. + // - if the store is at capacity, the worst address will be evicted. + // - an address that is not dialed yet (with score zero) will be preferred over an address + // that already failed (with negative score). + if self.addresses.len() >= self.max_capacity { + let min_record = self + .addresses + .values() + .min() + .cloned() + .expect("There is at least one element checked above; qed"); + + // The lowest score is better than the new record. + if record.score < min_record.score { + return; + } + self.addresses.remove(min_record.address()); + } + + // Insert the record. + self.addresses.insert(record.address.clone(), record); + } + + /// Return the available addresses sorted by score. + pub fn addresses(&self, limit: usize) -> Vec { + let mut records = self.addresses.values().cloned().collect::>(); + records.sort_by(|lhs, rhs| rhs.score.cmp(&lhs.score)); + records.into_iter().take(limit).map(|record| record.address).collect() + } +} + +#[cfg(test)] +mod tests { + use std::{ + collections::HashMap, + net::{Ipv4Addr, SocketAddrV4}, + }; + + use super::*; + use rand::{rngs::ThreadRng, Rng}; + + fn tcp_address_record(rng: &mut ThreadRng) -> AddressRecord { + let peer = PeerId::random(); + let address = std::net::SocketAddr::V4(SocketAddrV4::new( + Ipv4Addr::new( + 10, + rng.gen_range(0..=255), + rng.gen_range(0..=255), + rng.gen_range(1..=255), + ), + rng.gen_range(1..=65535), + )); + let score: i32 = rng.gen_range(10..=200); + + AddressRecord::new( + &peer, + Multiaddr::empty() + .with(Protocol::from(address.ip())) + .with(Protocol::Tcp(address.port())), + score, + ) + } + + fn ws_address_record(rng: &mut ThreadRng) -> AddressRecord { + let peer = PeerId::random(); + let address = std::net::SocketAddr::V4(SocketAddrV4::new( + Ipv4Addr::new( + 10, + rng.gen_range(0..=255), + rng.gen_range(0..=255), + rng.gen_range(1..=255), + ), + rng.gen_range(1..=65535), + )); + let score: i32 = rng.gen_range(10..=200); + + AddressRecord::new( + &peer, + Multiaddr::empty() + .with(Protocol::from(address.ip())) + .with(Protocol::Tcp(address.port())) + .with(Protocol::Ws(std::borrow::Cow::Owned("/".to_string()))), + score, + ) + } + + fn quic_address_record(rng: &mut ThreadRng) -> AddressRecord { + let peer = PeerId::random(); + let address = std::net::SocketAddr::V4(SocketAddrV4::new( + Ipv4Addr::new( + 10, + rng.gen_range(0..=255), + rng.gen_range(0..=255), + rng.gen_range(1..=255), + ), + rng.gen_range(1..=65535), + )); + let score: i32 = rng.gen_range(10..=200); + + AddressRecord::new( + &peer, + Multiaddr::empty() + .with(Protocol::from(address.ip())) + .with(Protocol::Udp(address.port())) + .with(Protocol::QuicV1), + score, + ) + } + + #[test] + fn take_multiple_records() { + let mut store = AddressStore::new(); + let mut rng = rand::thread_rng(); + + for _ in 0..rng.gen_range(1..5) { + store.insert(tcp_address_record(&mut rng)); + } + for _ in 0..rng.gen_range(1..5) { + store.insert(ws_address_record(&mut rng)); + } + for _ in 0..rng.gen_range(1..5) { + store.insert(quic_address_record(&mut rng)); + } + + let known_addresses = store.addresses.len(); + assert!(known_addresses >= 3); + + let taken = store.addresses(known_addresses - 2); + assert_eq!(known_addresses - 2, taken.len()); + assert!(!store.is_empty()); + + let mut prev: Option = None; + for address in taken { + // Addresses are still in the store. + assert!(store.addresses.contains_key(&address)); + + let record = store.addresses.get(&address).unwrap().clone(); + + if let Some(previous) = prev { + assert!(previous.score >= record.score); + } + + prev = Some(record); + } + } + + #[test] + fn attempt_to_take_excess_records() { + let mut store = AddressStore::new(); + let mut rng = rand::thread_rng(); + + store.insert(tcp_address_record(&mut rng)); + store.insert(ws_address_record(&mut rng)); + store.insert(quic_address_record(&mut rng)); + + assert_eq!(store.addresses.len(), 3); + + let taken = store.addresses(8usize); + assert_eq!(taken.len(), 3); + + let mut prev: Option = None; + for record in taken { + let record = store.addresses.get(&record).unwrap().clone(); + + if prev.is_none() { + prev = Some(record); + } else { + assert!(prev.unwrap().score >= record.score); + prev = Some(record); + } + } + } + + #[test] + fn extend_from_iterator() { + let mut store = AddressStore::new(); + let mut rng = rand::thread_rng(); + + let records = (0..10) + .map(|i| { + if i % 2 == 0 { + tcp_address_record(&mut rng) + } else if i % 3 == 0 { + quic_address_record(&mut rng) + } else { + ws_address_record(&mut rng) + } + }) + .collect::>(); + + assert!(store.is_empty()); + let cloned = records + .iter() + .cloned() + .map(|record| (record.address().clone(), record)) + .collect::>(); + store.extend(records); + + for record in store.addresses.values() { + let stored = cloned.get(record.address()).unwrap(); + assert_eq!(stored.score(), record.score()); + assert_eq!(stored.address(), record.address()); + } + } + + #[test] + fn extend_from_iterator_ref() { + let mut store = AddressStore::new(); + let mut rng = rand::thread_rng(); + + let records = (0..10) + .map(|i| { + if i % 2 == 0 { + let record = tcp_address_record(&mut rng); + (record.address().clone(), record) + } else if i % 3 == 0 { + let record = quic_address_record(&mut rng); + (record.address().clone(), record) + } else { + let record = ws_address_record(&mut rng); + (record.address().clone(), record) + } + }) + .collect::>(); + + assert!(store.is_empty()); + let cloned = records.iter().cloned().collect::>(); + store.extend(records.iter().map(|(_, record)| record)); + + for record in store.addresses.values() { + let stored = cloned.get(record.address()).unwrap(); + assert_eq!(stored.score(), record.score()); + assert_eq!(stored.address(), record.address()); + } + } + + #[test] + fn insert_record() { + let mut store = AddressStore::new(); + let mut rng = rand::thread_rng(); + + let mut record = tcp_address_record(&mut rng); + record.score = 10; + + store.insert(record.clone()); + + assert_eq!(store.addresses.len(), 1); + assert_eq!(store.addresses.get(record.address()).unwrap(), &record); + + // This time the record score is replaced (not accumulated). + store.insert(record.clone()); + + assert_eq!(store.addresses.len(), 1); + let store_record = store.addresses.get(record.address()).unwrap(); + assert_eq!(store_record.score, record.score); + } + + #[test] + fn insert_record_does_not_accumulate_public_bonus() { + let mut store = AddressStore::new(); + let peer = PeerId::random(); + + // Create a public address (8.8.8.8 is global) using from_multiaddr. + // The bonus is NOT applied at construction time, only when first inserted. + let address = Multiaddr::empty() + .with(Protocol::Ip4(Ipv4Addr::new(8, 8, 8, 8))) + .with(Protocol::Tcp(9999)) + .with(Protocol::P2p( + multihash::Multihash::from_bytes(&peer.to_bytes()).unwrap(), + )); + + let record = AddressRecord::from_multiaddr(address.clone()).unwrap(); + assert_eq!(record.score, 0); + + store.insert(record.clone()); + assert_eq!(store.addresses.len(), 1); + // Bonus applied on first insert. + assert_eq!( + store.addresses.get(&address).unwrap().score, + scores::PUBLIC_ADDRESS_BONUS + ); + + // Re-adding the same address should NOT accumulate the bonus. + let record2 = AddressRecord::from_multiaddr(address.clone()).unwrap(); + store.insert(record2); + + assert_eq!(store.addresses.len(), 1); + // Score should still be 1, not 2. + assert_eq!( + store.addresses.get(&address).unwrap().score, + scores::PUBLIC_ADDRESS_BONUS + ); + + // However, connection events should still update (replace) the score. + let connection_record = + AddressRecord::new(&peer, address.clone(), scores::CONNECTION_ESTABLISHED); + store.insert(connection_record); + + assert_eq!(store.addresses.len(), 1); + // Score should now be CONNECTION_ESTABLISHED (bonus only applied on first insert). + assert_eq!( + store.addresses.get(&address).unwrap().score, + scores::CONNECTION_ESTABLISHED + ); + } + + #[test] + fn rediscovery_does_not_wipe_dial_failure() { + let mut store = AddressStore::new(); + let peer = PeerId::random(); + + // Public address (8.8.8.8 is global). + let address = Multiaddr::empty() + .with(Protocol::Ip4(Ipv4Addr::new(8, 8, 8, 8))) + .with(Protocol::Tcp(9999)) + .with(Protocol::P2p( + multihash::Multihash::from_bytes(&peer.to_bytes()).unwrap(), + )); + + // First, add the address normally. + let record = AddressRecord::from_multiaddr(address.clone()).unwrap(); + store.insert(record); + assert_eq!( + store.addresses.get(&address).unwrap().score, + scores::PUBLIC_ADDRESS_BONUS + ); + + // Dial failure occurs (bonus only applied on first insert, not on updates). + let failure_record = AddressRecord::new(&peer, address.clone(), scores::CONNECTION_FAILURE); + store.insert(failure_record); + let failure_score = scores::CONNECTION_FAILURE; + assert_eq!(store.addresses.get(&address).unwrap().score, failure_score); + + // Address is rediscovered via Kademlia (creates record with score 0). + // This should NOT wipe out the dial failure score. + let rediscovered = AddressRecord::from_multiaddr(address.clone()).unwrap(); + assert_eq!(rediscovered.score, 0); + store.insert(rediscovered); + + // Score should still reflect the failure, not 0. + assert_eq!(store.addresses.get(&address).unwrap().score, failure_score); + } + + #[test] + fn evict_on_capacity() { + let mut store = AddressStore { + addresses: HashMap::new(), + max_capacity: 2, + }; + + let mut rng = rand::thread_rng(); + let mut first_record = tcp_address_record(&mut rng); + first_record.score = scores::CONNECTION_ESTABLISHED; + let mut second_record = ws_address_record(&mut rng); + second_record.score = 0; + + store.insert(first_record.clone()); + store.insert(second_record.clone()); + + assert_eq!(store.addresses.len(), 2); + + // We have better addresses, ignore this one. + let mut third_record = quic_address_record(&mut rng); + third_record.score = scores::CONNECTION_FAILURE; + store.insert(third_record.clone()); + assert_eq!(store.addresses.len(), 2); + assert!(store.addresses.contains_key(first_record.address())); + assert!(store.addresses.contains_key(second_record.address())); + + // Evict the address with the lowest score. + // Store contains scores: [100, 0]. + let mut fourth_record = quic_address_record(&mut rng); + fourth_record.score = 1; + store.insert(fourth_record.clone()); + + assert_eq!(store.addresses.len(), 2); + assert!(store.addresses.contains_key(first_record.address())); + assert!(store.addresses.contains_key(fourth_record.address())); + } +} diff --git a/client/litep2p/src/transport/manager/handle.rs b/client/litep2p/src/transport/manager/handle.rs new file mode 100644 index 00000000..c73e5260 --- /dev/null +++ b/client/litep2p/src/transport/manager/handle.rs @@ -0,0 +1,875 @@ +// Copyright 2023 litep2p developers +// +// Permission is hereby granted, free of charge, to any person obtaining a +// copy of this software and associated documentation files (the "Software"), +// to deal in the Software without restriction, including without limitation +// the rights to use, copy, modify, merge, publish, distribute, sublicense, +// and/or sell copies of the Software, and to permit persons to whom the +// Software is furnished to do so, subject to the following conditions: +// +// The above copyright notice and this permission notice shall be included in +// all copies or substantial portions of the Software. +// +// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS +// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE +// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER +// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING +// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER +// DEALINGS IN THE SOFTWARE. + +use crate::{ + addresses::PublicAddresses, + crypto::ed25519::Keypair, + error::ImmediateDialError, + executor::Executor, + protocol::ProtocolSet, + transport::manager::{ + address::AddressRecord, + peer_state::StateDialResult, + types::{PeerContext, SupportedTransport}, + ProtocolContext, TransportManagerEvent, LOG_TARGET, + }, + types::{protocol::ProtocolName, ConnectionId}, + BandwidthSink, PeerId, +}; + +use multiaddr::{Multiaddr, Protocol}; +use parking_lot::RwLock; +use tokio::sync::mpsc::{error::TrySendError, Sender}; + +use std::{ + collections::{HashMap, HashSet}, + net::IpAddr, + sync::{ + atomic::{AtomicUsize, Ordering}, + Arc, + }, +}; + +/// Inner commands sent from [`TransportManagerHandle`] to +/// [`crate::transport::manager::TransportManager`]. +pub enum InnerTransportManagerCommand { + /// Dial peer. + DialPeer { + /// Remote peer ID. + peer: PeerId, + }, + + /// Dial address. + DialAddress { + /// Remote address. + address: Multiaddr, + }, + + UnregisterProtocol { + /// Protocol name. + protocol: ProtocolName, + }, +} + +/// Handle for communicating with [`crate::transport::manager::TransportManager`]. +#[derive(Debug, Clone)] +pub struct TransportManagerHandle { + /// Local peer ID. + local_peer_id: PeerId, + + /// Peers. + peers: Arc>>, + + /// TX channel for sending commands to [`crate::transport::manager::TransportManager`]. + cmd_tx: Sender, + + /// Supported transports. + supported_transport: HashSet, + + /// Local listen addresess. + listen_addresses: Arc>>, + + /// Public addresses. + public_addresses: PublicAddresses, +} + +impl TransportManagerHandle { + /// Create new [`TransportManagerHandle`]. + pub fn new( + local_peer_id: PeerId, + peers: Arc>>, + cmd_tx: Sender, + supported_transport: HashSet, + listen_addresses: Arc>>, + public_addresses: PublicAddresses, + ) -> Self { + Self { + peers, + cmd_tx, + local_peer_id, + supported_transport, + listen_addresses, + public_addresses, + } + } + + /// Register new transport to [`TransportManagerHandle`]. + pub(crate) fn register_transport(&mut self, transport: SupportedTransport) { + self.supported_transport.insert(transport); + } + + /// Get the list of public addresses of the node. + pub(crate) fn public_addresses(&self) -> PublicAddresses { + self.public_addresses.clone() + } + + /// Get the list of listen addresses of the node. + pub(crate) fn listen_addresses(&self) -> HashSet { + self.listen_addresses.read().clone() + } + + /// Check if `address` is supported by one of the enabled transports. + pub fn supported_transport(&self, address: &Multiaddr) -> bool { + let mut iter = address.iter(); + + match iter.next() { + Some(Protocol::Ip4(address)) => + if address.is_unspecified() { + return false; + }, + Some(Protocol::Ip6(address)) => + if address.is_unspecified() { + return false; + }, + Some(Protocol::Dns(_)) | Some(Protocol::Dns4(_)) | Some(Protocol::Dns6(_)) => {} + _ => return false, + } + + match iter.next() { + None => false, + Some(Protocol::Tcp(_)) => match (iter.next(), iter.next(), iter.next()) { + (Some(Protocol::P2p(_)), None, None) => + self.supported_transport.contains(&SupportedTransport::Tcp), + #[cfg(feature = "websocket")] + (Some(Protocol::Ws(_)), Some(Protocol::P2p(_)), None) => + self.supported_transport.contains(&SupportedTransport::WebSocket), + #[cfg(feature = "websocket")] + (Some(Protocol::Wss(_)), Some(Protocol::P2p(_)), None) => + self.supported_transport.contains(&SupportedTransport::WebSocket), + _ => false, + }, + #[cfg(feature = "quic")] + Some(Protocol::Udp(_)) => match (iter.next(), iter.next(), iter.next()) { + (Some(Protocol::QuicV1), Some(Protocol::P2p(_)), None) => + self.supported_transport.contains(&SupportedTransport::Quic), + _ => false, + }, + _ => false, + } + } + + /// Helper to extract IP and Port from a Multiaddr + fn extract_ip_port(addr: &Multiaddr) -> Option<(IpAddr, u16)> { + let mut iter = addr.iter(); + let ip = match iter.next() { + Some(Protocol::Ip4(i)) => IpAddr::V4(i), + Some(Protocol::Ip6(i)) => IpAddr::V6(i), + _ => return None, + }; + + let port = match iter.next() { + Some(Protocol::Tcp(p)) | Some(Protocol::Udp(p)) => p, + _ => return None, + }; + + Some((ip, port)) + } + + /// Check if the address is a local listen address and if so, discard it. + fn is_local_address(&self, address: &Multiaddr) -> bool { + // Strip the peer ID if present. + let address: Multiaddr = address + .iter() + .take_while(|protocol| !std::matches!(protocol, Protocol::P2p(_))) + .collect(); + + // Check for the exact match. + let listen_addresses = self.listen_addresses.read(); + if listen_addresses.contains(&address) { + return true; + } + + let Some((ip, port)) = Self::extract_ip_port(&address) else { + return false; + }; + + for listen_address in listen_addresses.iter() { + let Some((listen_ip, listen_port)) = Self::extract_ip_port(listen_address) else { + continue; + }; + + if port == listen_port { + // Exact IP match. + if listen_ip == ip { + return true; + } + + // Check if the listener is binding to any (0.0.0.0) interface + // and the incoming is a loopback address. + if listen_ip.is_unspecified() && ip.is_loopback() { + return true; + } + + // Check for ipv4/ipv6 loopback equivalence. + if listen_ip.is_loopback() && ip.is_loopback() { + return true; + } + } + } + + false + } + + /// Add one or more known addresses for peer. + /// + /// If peer doesn't exist, it will be added to known peers. + /// + /// Returns the number of added addresses after non-supported transports were filtered out. + pub fn add_known_address( + &mut self, + peer: &PeerId, + addresses: impl Iterator, + ) -> usize { + let mut peer_addresses = HashSet::new(); + + for address in addresses { + // There is not supported transport configured that can dial this address. + if !self.supported_transport(&address) { + continue; + } + if self.is_local_address(&address) { + continue; + } + + // Check the peer ID if present. + if let Some(Protocol::P2p(multihash)) = address.iter().last() { + // This can correspond to the provided peerID or to a different one. + if multihash != *peer.as_ref() { + tracing::debug!( + target: LOG_TARGET, + ?peer, + ?address, + "Refusing to add known address that corresponds to a different peer ID", + ); + + continue; + } + + peer_addresses.insert(address); + } else { + // Add the provided peer ID to the address. + let address = address.with(Protocol::P2p(multihash::Multihash::from(*peer))); + peer_addresses.insert(address); + } + } + + let num_added = peer_addresses.len(); + + tracing::trace!( + target: LOG_TARGET, + ?peer, + ?peer_addresses, + "add known addresses", + ); + + let mut peers = self.peers.write(); + let entry = peers.entry(*peer).or_default(); + + // All addresses should be valid at this point, since the peer ID was either added or + // double checked. + entry + .addresses + .extend(peer_addresses.into_iter().filter_map(AddressRecord::from_multiaddr)); + + num_added + } + + /// Dial peer using `PeerId`. + /// + /// Returns an error if the peer is unknown or the peer is already connected. + pub fn dial(&self, peer: &PeerId) -> Result<(), ImmediateDialError> { + if peer == &self.local_peer_id { + return Err(ImmediateDialError::TriedToDialSelf); + } + + { + let peers = self.peers.read(); + let Some(PeerContext { state, addresses }) = peers.get(peer) else { + return Err(ImmediateDialError::NoAddressAvailable); + }; + + match state.can_dial() { + StateDialResult::AlreadyConnected => + return Err(ImmediateDialError::AlreadyConnected), + StateDialResult::DialingInProgress => return Ok(()), + StateDialResult::Ok => {} + }; + + // Check if we have enough addresses to dial. + if addresses.is_empty() { + return Err(ImmediateDialError::NoAddressAvailable); + } + } + + self.cmd_tx + .try_send(InnerTransportManagerCommand::DialPeer { peer: *peer }) + .map_err(|error| match error { + TrySendError::Full(_) => ImmediateDialError::ChannelClogged, + TrySendError::Closed(_) => ImmediateDialError::TaskClosed, + }) + } + + /// Dial peer using `Multiaddr`. + /// + /// Returns an error if address it not valid. + pub fn dial_address(&self, address: Multiaddr) -> Result<(), ImmediateDialError> { + if !address.iter().any(|protocol| std::matches!(protocol, Protocol::P2p(_))) { + return Err(ImmediateDialError::PeerIdMissing); + } + + self.cmd_tx + .try_send(InnerTransportManagerCommand::DialAddress { address }) + .map_err(|error| match error { + TrySendError::Full(_) => ImmediateDialError::ChannelClogged, + TrySendError::Closed(_) => ImmediateDialError::TaskClosed, + }) + } + + /// Dynamically unregister a protocol. + /// + /// This must be called when a protocol is no longer needed (e.g. user dropped the protocol + /// handle). + pub fn unregister_protocol(&self, protocol: ProtocolName) { + tracing::info!( + target: LOG_TARGET, + ?protocol, + "Unregistering user protocol on handle drop" + ); + + if let Err(err) = self + .cmd_tx + .try_send(InnerTransportManagerCommand::UnregisterProtocol { protocol }) + { + tracing::error!( + target: LOG_TARGET, + ?err, + "Failed to unregister protocol" + ); + } + } +} + +pub struct TransportHandle { + pub keypair: Keypair, + pub tx: Sender, + pub protocols: HashMap, + pub next_connection_id: Arc, + pub next_substream_id: Arc, + pub bandwidth_sink: BandwidthSink, + pub executor: Arc, +} + +impl TransportHandle { + pub fn protocol_set(&self, connection_id: ConnectionId) -> ProtocolSet { + ProtocolSet::new( + connection_id, + self.tx.clone(), + self.next_substream_id.clone(), + self.protocols.clone(), + ) + } + + /// Get next connection ID. + pub fn next_connection_id(&mut self) -> ConnectionId { + let connection_id = self.next_connection_id.fetch_add(1usize, Ordering::Relaxed); + + ConnectionId::from(connection_id) + } +} + +#[cfg(test)] +mod tests { + use crate::transport::manager::{ + address::AddressStore, + peer_state::{ConnectionRecord, PeerState}, + }; + + use super::*; + use multihash::Multihash; + use parking_lot::lock_api::RwLock; + use tokio::sync::mpsc::{channel, Receiver}; + + fn make_transport_manager_handle() -> ( + TransportManagerHandle, + Receiver, + ) { + let (cmd_tx, cmd_rx) = channel(64); + + let local_peer_id = PeerId::random(); + ( + TransportManagerHandle { + local_peer_id, + cmd_tx, + peers: Default::default(), + supported_transport: HashSet::new(), + listen_addresses: Default::default(), + public_addresses: PublicAddresses::new(local_peer_id), + }, + cmd_rx, + ) + } + + #[tokio::test] + async fn tcp_supported() { + let (mut handle, _rx) = make_transport_manager_handle(); + handle.supported_transport.insert(SupportedTransport::Tcp); + + let address = + "/dns4/google.com/tcp/24928/p2p/12D3KooWKrUnV42yDR7G6DewmgHtFaVCJWLjQRi2G9t5eJD3BvTy" + .parse() + .unwrap(); + assert!(handle.supported_transport(&address)); + } + + #[tokio::test] + async fn tcp_unsupported() { + let (handle, _rx) = make_transport_manager_handle(); + + let address = + "/dns4/google.com/tcp/24928/p2p/12D3KooWKrUnV42yDR7G6DewmgHtFaVCJWLjQRi2G9t5eJD3BvTy" + .parse() + .unwrap(); + assert!(!handle.supported_transport(&address)); + } + + #[tokio::test] + async fn tcp_non_terminal_unsupported() { + let (mut handle, _rx) = make_transport_manager_handle(); + handle.supported_transport.insert(SupportedTransport::Tcp); + + let address = + "/dns4/google.com/tcp/24928/p2p/12D3KooWKrUnV42yDR7G6DewmgHtFaVCJWLjQRi2G9t5eJD3BvTy/p2p-circuit" + .parse() + .unwrap(); + assert!(!handle.supported_transport(&address)); + } + + #[cfg(feature = "websocket")] + #[tokio::test] + async fn websocket_supported() { + let (mut handle, _rx) = make_transport_manager_handle(); + handle.supported_transport.insert(SupportedTransport::WebSocket); + + let address = + "/dns4/google.com/tcp/24928/ws/p2p/12D3KooWKrUnV42yDR7G6DewmgHtFaVCJWLjQRi2G9t5eJD3BvTy" + .parse() + .unwrap(); + assert!(handle.supported_transport(&address)); + } + + #[cfg(feature = "websocket")] + #[tokio::test] + async fn websocket_unsupported() { + let (handle, _rx) = make_transport_manager_handle(); + + let address = + "/dns4/google.com/tcp/24928/ws/p2p/12D3KooWKrUnV42yDR7G6DewmgHtFaVCJWLjQRi2G9t5eJD3BvTy" + .parse() + .unwrap(); + assert!(!handle.supported_transport(&address)); + } + + #[cfg(feature = "websocket")] + #[tokio::test] + async fn websocket_non_terminal_unsupported() { + let (mut handle, _rx) = make_transport_manager_handle(); + handle.supported_transport.insert(SupportedTransport::WebSocket); + + let address = + "/dns4/google.com/tcp/24928/ws/p2p/12D3KooWKrUnV42yDR7G6DewmgHtFaVCJWLjQRi2G9t5eJD3BvTy/p2p-circuit" + .parse() + .unwrap(); + assert!(!handle.supported_transport(&address)); + } + + #[cfg(feature = "websocket")] + #[tokio::test] + async fn wss_supported() { + let (mut handle, _rx) = make_transport_manager_handle(); + handle.supported_transport.insert(SupportedTransport::WebSocket); + + let address = + "/dns4/google.com/tcp/24928/wss/p2p/12D3KooWKrUnV42yDR7G6DewmgHtFaVCJWLjQRi2G9t5eJD3BvTy" + .parse() + .unwrap(); + assert!(handle.supported_transport(&address)); + } + + #[cfg(feature = "websocket")] + #[tokio::test] + async fn wss_unsupported() { + let (handle, _rx) = make_transport_manager_handle(); + + let address = + "/dns4/google.com/tcp/24928/wss/p2p/12D3KooWKrUnV42yDR7G6DewmgHtFaVCJWLjQRi2G9t5eJD3BvTy" + .parse() + .unwrap(); + assert!(!handle.supported_transport(&address)); + } + + #[cfg(feature = "websocket")] + #[tokio::test] + async fn wss_non_terminal_unsupported() { + let (mut handle, _rx) = make_transport_manager_handle(); + handle.supported_transport.insert(SupportedTransport::WebSocket); + + let address = + "/dns4/google.com/tcp/24928/wss/p2p/12D3KooWKrUnV42yDR7G6DewmgHtFaVCJWLjQRi2G9t5eJD3BvTy/p2p-circuit" + .parse() + .unwrap(); + assert!(!handle.supported_transport(&address)); + } + + #[cfg(feature = "quic")] + #[tokio::test] + async fn quic_supported() { + let (mut handle, _rx) = make_transport_manager_handle(); + handle.supported_transport.insert(SupportedTransport::Quic); + + let address = + "/dns4/google.com/udp/24928/quic-v1/p2p/12D3KooWKrUnV42yDR7G6DewmgHtFaVCJWLjQRi2G9t5eJD3BvTy" + .parse() + .unwrap(); + assert!(handle.supported_transport(&address)); + } + + #[cfg(feature = "quic")] + #[tokio::test] + async fn quic_unsupported() { + let (handle, _rx) = make_transport_manager_handle(); + + let address = + "/dns4/google.com/udp/24928/quic-v1/p2p/12D3KooWKrUnV42yDR7G6DewmgHtFaVCJWLjQRi2G9t5eJD3BvTy" + .parse() + .unwrap(); + assert!(!handle.supported_transport(&address)); + } + + #[cfg(feature = "quic")] + #[tokio::test] + async fn quic_non_terminal_unsupported() { + let (mut handle, _rx) = make_transport_manager_handle(); + handle.supported_transport.insert(SupportedTransport::Quic); + + let address = + "/dns4/google.com/udp/24928/quic-v1/p2p/12D3KooWKrUnV42yDR7G6DewmgHtFaVCJWLjQRi2G9t5eJD3BvTy/p2p-circuit" + .parse() + .unwrap(); + assert!(!handle.supported_transport(&address)); + } + + #[test] + fn transport_not_supported() { + let (handle, _rx) = make_transport_manager_handle(); + + // only peer id (used by Polkadot sometimes) + assert!(!handle.supported_transport( + &Multiaddr::empty().with(Protocol::P2p(Multihash::from(PeerId::random()))) + )); + + // only one transport + assert!(!handle.supported_transport( + &Multiaddr::empty().with(Protocol::Ip4(std::net::Ipv4Addr::new(127, 0, 0, 1))) + )); + + // any udp-based protocol other than quic + assert!(!handle.supported_transport( + &Multiaddr::empty() + .with(Protocol::Ip4(std::net::Ipv4Addr::new(127, 0, 0, 1))) + .with(Protocol::Udp(8888)) + .with(Protocol::Utp) + )); + + // any other protocol other than tcp + assert!(!handle.supported_transport( + &Multiaddr::empty() + .with(Protocol::Ip4(std::net::Ipv4Addr::new(127, 0, 0, 1))) + .with(Protocol::Sctp(8888)) + )); + } + + #[test] + fn zero_addresses_added() { + let (mut handle, _rx) = make_transport_manager_handle(); + handle.supported_transport.insert(SupportedTransport::Tcp); + + assert!( + handle.add_known_address( + &PeerId::random(), + vec![ + Multiaddr::empty() + .with(Protocol::Ip4(std::net::Ipv4Addr::new(127, 0, 0, 1))) + .with(Protocol::Udp(8888)) + .with(Protocol::Utp), + Multiaddr::empty() + .with(Protocol::Ip4(std::net::Ipv4Addr::new(127, 0, 0, 1))) + .with(Protocol::Tcp(8888)) + .with(Protocol::Wss(std::borrow::Cow::Owned("/".to_string()))), + ] + .into_iter() + ) == 0usize + ); + } + + #[tokio::test] + async fn dial_already_connected_peer() { + let (mut handle, _rx) = make_transport_manager_handle(); + handle.supported_transport.insert(SupportedTransport::Tcp); + + let peer = { + let peer = PeerId::random(); + let mut peers = handle.peers.write(); + + peers.insert( + peer, + PeerContext { + state: PeerState::Connected { + record: ConnectionRecord { + address: Multiaddr::empty() + .with(Protocol::Ip4(std::net::Ipv4Addr::new(127, 0, 0, 1))) + .with(Protocol::Tcp(8888)) + .with(Protocol::P2p(Multihash::from(peer))), + connection_id: ConnectionId::from(0), + }, + secondary: None, + }, + + addresses: AddressStore::from_iter( + vec![Multiaddr::empty() + .with(Protocol::Ip4(std::net::Ipv4Addr::new(127, 0, 0, 1))) + .with(Protocol::Tcp(8888)) + .with(Protocol::P2p(Multihash::from(peer)))] + .into_iter(), + ), + }, + ); + drop(peers); + + peer + }; + + match handle.dial(&peer) { + Err(ImmediateDialError::AlreadyConnected) => {} + _ => panic!("invalid return value"), + } + } + + #[tokio::test] + async fn peer_already_being_dialed() { + let (mut handle, _rx) = make_transport_manager_handle(); + handle.supported_transport.insert(SupportedTransport::Tcp); + + let peer = { + let peer = PeerId::random(); + let mut peers = handle.peers.write(); + + peers.insert( + peer, + PeerContext { + state: PeerState::Dialing { + dial_record: ConnectionRecord { + address: Multiaddr::empty() + .with(Protocol::Ip4(std::net::Ipv4Addr::new(127, 0, 0, 1))) + .with(Protocol::Tcp(8888)) + .with(Protocol::P2p(Multihash::from(peer))), + connection_id: ConnectionId::from(0), + }, + }, + + addresses: AddressStore::from_iter( + vec![Multiaddr::empty() + .with(Protocol::Ip4(std::net::Ipv4Addr::new(127, 0, 0, 1))) + .with(Protocol::Tcp(8888)) + .with(Protocol::P2p(Multihash::from(peer)))] + .into_iter(), + ), + }, + ); + drop(peers); + + peer + }; + + match handle.dial(&peer) { + Ok(()) => {} + _ => panic!("invalid return value"), + } + } + + #[tokio::test] + async fn no_address_available_for_peer() { + let (mut handle, _rx) = make_transport_manager_handle(); + handle.supported_transport.insert(SupportedTransport::Tcp); + + let peer = { + let peer = PeerId::random(); + let mut peers = handle.peers.write(); + + peers.insert( + peer, + PeerContext { + state: PeerState::Disconnected { dial_record: None }, + addresses: AddressStore::new(), + }, + ); + drop(peers); + + peer + }; + + let err = handle.dial(&peer).unwrap_err(); + assert!(matches!(err, ImmediateDialError::NoAddressAvailable)); + } + + #[tokio::test] + async fn pending_connection_for_disconnected_peer() { + let (mut handle, mut rx) = make_transport_manager_handle(); + handle.supported_transport.insert(SupportedTransport::Tcp); + + let peer = { + let peer = PeerId::random(); + let mut peers = handle.peers.write(); + + peers.insert( + peer, + PeerContext { + state: PeerState::Disconnected { + dial_record: Some(ConnectionRecord::new( + peer, + Multiaddr::empty() + .with(Protocol::Ip4(std::net::Ipv4Addr::new(127, 0, 0, 1))) + .with(Protocol::Tcp(8888)) + .with(Protocol::P2p(Multihash::from(peer))), + ConnectionId::from(0), + )), + }, + + addresses: AddressStore::from_iter( + vec![Multiaddr::empty() + .with(Protocol::Ip4(std::net::Ipv4Addr::new(127, 0, 0, 1))) + .with(Protocol::Tcp(8888)) + .with(Protocol::P2p(Multihash::from(peer)))] + .into_iter(), + ), + }, + ); + drop(peers); + + peer + }; + + match handle.dial(&peer) { + Ok(()) => {} + _ => panic!("invalid return value"), + } + assert!(rx.try_recv().is_err()); + } + + #[tokio::test] + async fn try_to_dial_self() { + let (mut handle, mut rx) = make_transport_manager_handle(); + handle.supported_transport.insert(SupportedTransport::Tcp); + + let err = handle.dial(&handle.local_peer_id).unwrap_err(); + assert_eq!(err, ImmediateDialError::TriedToDialSelf); + + assert!(rx.try_recv().is_err()); + } + + #[test] + fn is_local_address() { + let (cmd_tx, _cmd_rx) = channel(64); + + let local_peer_id = PeerId::random(); + let specific_bind: Multiaddr = "/ip6/::1/tcp/8888".parse().expect("valid multiaddress"); + let ipv6_bind: Multiaddr = "/ip4/127.0.0.1/tcp/8888".parse().expect("valid multiaddress"); + let wildcard_bind: Multiaddr = "/ip4/0.0.0.0/tcp/9000".parse().unwrap(); + + let listen_addresses = Arc::new(RwLock::new( + [specific_bind, wildcard_bind, ipv6_bind].into_iter().collect(), + )); + println!("{:?}", listen_addresses); + + let handle = TransportManagerHandle { + local_peer_id, + cmd_tx, + peers: Default::default(), + supported_transport: HashSet::new(), + listen_addresses, + public_addresses: PublicAddresses::new(local_peer_id), + }; + + // Exact matches + assert!(handle + .is_local_address(&"/ip4/127.0.0.1/tcp/8888".parse().expect("valid multiaddress"))); + assert!(handle.is_local_address( + &"/ip6/::1/tcp/8888".parse::().expect("valid multiaddress") + )); + + // Peer ID stripping + assert!(handle.is_local_address( + &"/ip6/::1/tcp/8888/p2p/12D3KooWT2ouvz5uMmCvHJGzAGRHiqDts5hzXR7NdoQ27pGdzp9Q" + .parse() + .expect("valid multiaddress") + )); + assert!(handle.is_local_address( + &"/ip4/127.0.0.1/tcp/8888/p2p/12D3KooWT2ouvz5uMmCvHJGzAGRHiqDts5hzXR7NdoQ27pGdzp9Q" + .parse() + .expect("valid multiaddress") + )); + // same address but different peer id + assert!(handle.is_local_address( + &"/ip6/::1/tcp/8888/p2p/12D3KooWPGxxxQiBEBZ52RY31Z2chn4xsDrGCMouZ88izJrak2T1" + .parse::() + .expect("valid multiaddress") + )); + assert!(handle.is_local_address( + &"/ip4/127.0.0.1/tcp/8888/p2p/12D3KooWPGxxxQiBEBZ52RY31Z2chn4xsDrGCMouZ88izJrak2T1" + .parse() + .expect("valid multiaddress") + )); + + // Port collision protection: we listen on 0.0.0.0:9000 and should match any loopback + // address on port 9000. + assert!( + handle.is_local_address(&"/ip4/127.0.0.1/tcp/9000".parse().unwrap()), + "Loopback input should satisfy Wildcard (0.0.0.0) listener" + ); + // 8.8.8.8 is a different IP. + assert!( + !handle.is_local_address(&"/ip4/8.8.8.8/tcp/9000".parse().unwrap()), + "Remote IP with same port should NOT be considered local against Wildcard listener" + ); + + // Port mismatches + assert!( + !handle.is_local_address(&"/ip4/127.0.0.1/tcp/1234".parse().unwrap()), + "Same IP but different port should fail" + ); + assert!( + !handle.is_local_address(&"/ip4/0.0.0.0/tcp/1234".parse().unwrap()), + "Wildcard IP but different port should fail" + ); + assert!(!handle + .is_local_address(&"/ip4/127.0.0.1/tcp/9999".parse().expect("valid multiaddress"))); + assert!(!handle + .is_local_address(&"/ip4/127.0.0.1/tcp/7777".parse().expect("valid multiaddress"))); + } +} diff --git a/client/litep2p/src/transport/manager/limits.rs b/client/litep2p/src/transport/manager/limits.rs new file mode 100644 index 00000000..0af49eb1 --- /dev/null +++ b/client/litep2p/src/transport/manager/limits.rs @@ -0,0 +1,227 @@ +// Copyright 2024 litep2p developers +// +// Permission is hereby granted, free of charge, to any person obtaining a +// copy of this software and associated documentation files (the "Software"), +// to deal in the Software without restriction, including without limitation +// the rights to use, copy, modify, merge, publish, distribute, sublicense, +// and/or sell copies of the Software, and to permit persons to whom the +// Software is furnished to do so, subject to the following conditions: +// +// The above copyright notice and this permission notice shall be included in +// all copies or substantial portions of the Software. +// +// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS +// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE +// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER +// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING +// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER +// DEALINGS IN THE SOFTWARE. + +//! Limits for the transport manager. + +use crate::types::ConnectionId; + +use std::collections::HashSet; + +/// Configuration for the connection limits. +#[derive(Debug, Clone, Default)] +pub struct ConnectionLimitsConfig { + /// Maximum number of incoming connections that can be established. + max_incoming_connections: Option, + /// Maximum number of outgoing connections that can be established. + max_outgoing_connections: Option, +} + +impl ConnectionLimitsConfig { + /// Configures the maximum number of incoming connections that can be established. + pub fn max_incoming_connections(mut self, limit: Option) -> Self { + self.max_incoming_connections = limit; + self + } + + /// Configures the maximum number of outgoing connections that can be established. + pub fn max_outgoing_connections(mut self, limit: Option) -> Self { + self.max_outgoing_connections = limit; + self + } +} + +/// Error type for connection limits. +#[derive(Debug, Clone, Copy, PartialEq, Eq)] +pub enum ConnectionLimitsError { + /// Maximum number of incoming connections exceeded. + MaxIncomingConnectionsExceeded, + /// Maximum number of outgoing connections exceeded. + MaxOutgoingConnectionsExceeded, +} + +/// Connection limits. +#[derive(Debug, Clone)] +pub struct ConnectionLimits { + /// Configuration for the connection limits. + config: ConnectionLimitsConfig, + + /// Established incoming connections. + incoming_connections: HashSet, + /// Established outgoing connections. + outgoing_connections: HashSet, +} + +impl ConnectionLimits { + /// Creates a new connection limits instance. + pub fn new(config: ConnectionLimitsConfig) -> Self { + let max_incoming_connections = config.max_incoming_connections.unwrap_or(0); + let max_outgoing_connections = config.max_outgoing_connections.unwrap_or(0); + + Self { + config, + incoming_connections: HashSet::with_capacity(max_incoming_connections), + outgoing_connections: HashSet::with_capacity(max_outgoing_connections), + } + } + + /// Called when dialing an address. + /// + /// Returns the number of outgoing connections permitted to be established. + /// It is guaranteed that at least one connection can be established if the method returns `Ok`. + /// The number of available outgoing connections can influence the maximum parallel dials to a + /// single address. + /// + /// If the maximum number of outgoing connections is not set, `Ok(usize::MAX)` is returned. + pub fn on_dial_address(&mut self) -> Result { + if let Some(max_outgoing_connections) = self.config.max_outgoing_connections { + if self.outgoing_connections.len() >= max_outgoing_connections { + return Err(ConnectionLimitsError::MaxOutgoingConnectionsExceeded); + } + + return Ok(max_outgoing_connections - self.outgoing_connections.len()); + } + + Ok(usize::MAX) + } + + /// Called before accepting a new incoming connection. + pub fn on_incoming(&mut self) -> Result<(), ConnectionLimitsError> { + if let Some(max_incoming_connections) = self.config.max_incoming_connections { + if self.incoming_connections.len() >= max_incoming_connections { + return Err(ConnectionLimitsError::MaxIncomingConnectionsExceeded); + } + } + + Ok(()) + } + + /// Called when a new connection is established. + /// + /// Returns an error if the connection cannot be accepted due to connection limits. + pub fn can_accept_connection( + &mut self, + is_listener: bool, + ) -> Result<(), ConnectionLimitsError> { + // Check connection limits. + if is_listener { + if let Some(max_incoming_connections) = self.config.max_incoming_connections { + if self.incoming_connections.len() >= max_incoming_connections { + return Err(ConnectionLimitsError::MaxIncomingConnectionsExceeded); + } + } + } else if let Some(max_outgoing_connections) = self.config.max_outgoing_connections { + if self.outgoing_connections.len() >= max_outgoing_connections { + return Err(ConnectionLimitsError::MaxOutgoingConnectionsExceeded); + } + } + + Ok(()) + } + + /// Accept an established connection. + /// + /// # Note + /// + /// This method should be called after the `Self::can_accept_connection` method + /// to ensure that the connection can be accepted. + pub fn accept_established_connection( + &mut self, + connection_id: ConnectionId, + is_listener: bool, + ) { + if is_listener { + if self.config.max_incoming_connections.is_some() { + self.incoming_connections.insert(connection_id); + } + } else if self.config.max_outgoing_connections.is_some() { + self.outgoing_connections.insert(connection_id); + } + } + + /// Called when a connection is closed. + pub fn on_connection_closed(&mut self, connection_id: ConnectionId) { + self.incoming_connections.remove(&connection_id); + self.outgoing_connections.remove(&connection_id); + } +} + +#[cfg(test)] +mod tests { + use super::*; + use crate::types::ConnectionId; + + #[test] + fn connection_limits() { + let config = ConnectionLimitsConfig::default() + .max_incoming_connections(Some(3)) + .max_outgoing_connections(Some(2)); + let mut limits = ConnectionLimits::new(config); + + let connection_id_in_1 = ConnectionId::random(); + let connection_id_in_2 = ConnectionId::random(); + let connection_id_out_1 = ConnectionId::random(); + let connection_id_out_2 = ConnectionId::random(); + let connection_id_in_3 = ConnectionId::random(); + + // Establish incoming connection. + assert!(limits.can_accept_connection(true).is_ok()); + limits.accept_established_connection(connection_id_in_1, true); + assert_eq!(limits.incoming_connections.len(), 1); + + assert!(limits.can_accept_connection(true).is_ok()); + limits.accept_established_connection(connection_id_in_2, true); + assert_eq!(limits.incoming_connections.len(), 2); + + assert!(limits.can_accept_connection(true).is_ok()); + limits.accept_established_connection(connection_id_in_3, true); + assert_eq!(limits.incoming_connections.len(), 3); + + assert_eq!( + limits.can_accept_connection(true).unwrap_err(), + ConnectionLimitsError::MaxIncomingConnectionsExceeded + ); + assert_eq!(limits.incoming_connections.len(), 3); + + // Establish outgoing connection. + assert!(limits.can_accept_connection(false).is_ok()); + limits.accept_established_connection(connection_id_out_1, false); + assert_eq!(limits.incoming_connections.len(), 3); + assert_eq!(limits.outgoing_connections.len(), 1); + + assert!(limits.can_accept_connection(false).is_ok()); + limits.accept_established_connection(connection_id_out_2, false); + assert_eq!(limits.incoming_connections.len(), 3); + assert_eq!(limits.outgoing_connections.len(), 2); + + assert_eq!( + limits.can_accept_connection(false).unwrap_err(), + ConnectionLimitsError::MaxOutgoingConnectionsExceeded + ); + + // Close connections with peer a. + limits.on_connection_closed(connection_id_in_1); + assert_eq!(limits.incoming_connections.len(), 2); + assert_eq!(limits.outgoing_connections.len(), 2); + + limits.on_connection_closed(connection_id_out_1); + assert_eq!(limits.incoming_connections.len(), 2); + assert_eq!(limits.outgoing_connections.len(), 1); + } +} diff --git a/client/litep2p/src/transport/manager/mod.rs b/client/litep2p/src/transport/manager/mod.rs new file mode 100644 index 00000000..49d988b2 --- /dev/null +++ b/client/litep2p/src/transport/manager/mod.rs @@ -0,0 +1,3838 @@ +// Copyright 2023 litep2p developers +// +// Permission is hereby granted, free of charge, to any person obtaining a +// copy of this software and associated documentation files (the "Software"), +// to deal in the Software without restriction, including without limitation +// the rights to use, copy, modify, merge, publish, distribute, sublicense, +// and/or sell copies of the Software, and to permit persons to whom the +// Software is furnished to do so, subject to the following conditions: +// +// The above copyright notice and this permission notice shall be included in +// all copies or substantial portions of the Software. +// +// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS +// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE +// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER +// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING +// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER +// DEALINGS IN THE SOFTWARE. + +use crate::{ + addresses::PublicAddresses, + codec::ProtocolCodec, + crypto::ed25519::Keypair, + error::{AddressError, DialError, Error}, + executor::Executor, + protocol::{InnerTransportEvent, TransportService}, + transport::{ + manager::{ + address::AddressRecord, + handle::InnerTransportManagerCommand, + peer_state::{ConnectionRecord, PeerState, StateDialResult}, + types::PeerContext, + }, + Endpoint, Transport, TransportEvent, + }, + types::{protocol::ProtocolName, ConnectionId}, + BandwidthSink, PeerId, +}; + +use address::{scores, AddressStore}; +use futures::{future::BoxFuture, stream::FuturesUnordered, Stream, StreamExt}; +use indexmap::IndexMap; +use multiaddr::{Multiaddr, Protocol}; +use multihash::Multihash; +use parking_lot::RwLock; +use tokio::sync::mpsc::{channel, Receiver, Sender}; + +use std::{ + collections::{HashMap, HashSet}, + pin::Pin, + sync::{ + atomic::{AtomicUsize, Ordering}, + Arc, + }, + task::{Context, Poll}, + time::Duration, +}; + +pub use crate::protocol::SubstreamKeepAlive; +pub use handle::{TransportHandle, TransportManagerHandle}; +pub use types::SupportedTransport; + +pub(crate) mod address; +pub mod limits; +mod peer_state; +mod types; + +pub(crate) mod handle; + +// TODO: https://github.com/paritytech/litep2p/issues/268 Periodically clean up idle peers. +// TODO: https://github.com/paritytech/litep2p/issues/344 add lots of documentation + +/// Logging target for the file. +const LOG_TARGET: &str = "litep2p::transport-manager"; + +/// The connection established result. +#[derive(Debug, Clone, Copy, Eq, PartialEq)] +enum ConnectionEstablishedResult { + /// Accept connection and inform `Litep2p` about the connection. + Accept, + + /// Reject connection. + Reject, +} + +/// [`crate::transport::manager::TransportManager`] events. +pub enum TransportManagerEvent { + /// Connection closed to remote peer. + ConnectionClosed { + /// Peer ID. + peer: PeerId, + + /// Connection ID. + connection: ConnectionId, + }, +} + +// Protocol context. +#[derive(Debug, Clone)] +pub struct ProtocolContext { + /// Codec used by the protocol. + pub codec: ProtocolCodec, + + /// TX channel for sending events to protocol. + pub tx: Sender, + + /// Fallback names for the protocol. + pub fallback_names: Vec, + + /// Whether this protocol existing substreams should keep connection alive. + pub keep_alive: SubstreamKeepAlive, +} + +impl ProtocolContext { + /// Create new [`ProtocolContext`]. + fn new( + codec: ProtocolCodec, + tx: Sender, + fallback_names: Vec, + keep_alive: SubstreamKeepAlive, + ) -> Self { + Self { + tx, + codec, + fallback_names, + keep_alive, + } + } +} + +/// Transport context for enabled transports. +struct TransportContext { + /// Polling index. + index: usize, + + /// Registered transports. + transports: IndexMap>>, +} + +impl TransportContext { + /// Create new [`TransportContext`]. + pub fn new() -> Self { + Self { + index: 0usize, + transports: IndexMap::new(), + } + } + + /// Get an iterator of supported transports. + pub fn keys(&self) -> impl Iterator { + self.transports.keys() + } + + /// Get mutable access to transport. + pub fn get_mut( + &mut self, + key: &SupportedTransport, + ) -> Option<&mut Box>> { + self.transports.get_mut(key) + } + + /// Register `transport` to `TransportContext`. + pub fn register_transport( + &mut self, + name: SupportedTransport, + transport: Box>, + ) { + assert!(self.transports.insert(name, transport).is_none()); + } +} + +impl Stream for TransportContext { + type Item = (SupportedTransport, TransportEvent); + + fn poll_next(mut self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll> { + if self.transports.is_empty() { + // Terminate if we don't have any transports installed. + return Poll::Ready(None); + } + + let len = self.transports.len(); + for _ in 0..len { + let current = self.index; + self.index = (current + 1) % len; + let (key, stream) = self.transports.get_index_mut(current).expect("transport to exist"); + match stream.poll_next_unpin(cx) { + Poll::Pending => {} + Poll::Ready(None) => { + return Poll::Ready(None); + } + Poll::Ready(Some(event)) => { + let event = Some((*key, event)); + return Poll::Ready(event); + } + } + } + + Poll::Pending + } +} + +/// Litep2p connection manager. +pub struct TransportManager { + /// Local peer ID. + local_peer_id: PeerId, + + /// Keypair. + keypair: Keypair, + + /// Bandwidth sink. + bandwidth_sink: BandwidthSink, + + /// Installed protocols. + protocols: HashMap, + + /// All names (main and fallback(s)) of the installed protocols. + protocol_names: HashSet, + + /// Listen addresses. + listen_addresses: Arc>>, + + /// Listen addresses. + public_addresses: PublicAddresses, + + /// Next connection ID. + next_connection_id: Arc, + + /// Next substream ID. + next_substream_id: Arc, + + /// Installed transports. + transports: TransportContext, + + /// Peers + peers: Arc>>, + + /// Handle to [`crate::transport::manager::TransportManager`]. + transport_manager_handle: TransportManagerHandle, + + /// RX channel for receiving events from installed transports. + event_rx: Receiver, + + /// RX channel for receiving commands from installed protocols. + cmd_rx: Receiver, + + /// TX channel for transport events that is given to installed transports. + event_tx: Sender, + + /// Pending connections. + pending_connections: HashMap, + + /// Connection limits. + connection_limits: limits::ConnectionLimits, + + /// Opening connections errors. + opening_errors: HashMap>, + + /// Pending accept futures with associated connection information. + pending_accept: FuturesUnordered)>>, +} + +/// Builder for [`crate::transport::manager::TransportManager`]. +pub struct TransportManagerBuilder { + /// Keypair. + keypair: Option, + + /// Supported transports. + supported_transports: HashSet, + + /// Bandwidth sink. + bandwidth_sink: Option, + + /// Connection limits config. + connection_limits_config: limits::ConnectionLimitsConfig, +} + +impl Default for TransportManagerBuilder { + fn default() -> Self { + Self::new() + } +} + +impl TransportManagerBuilder { + /// Create new [`crate::transport::manager::TransportManagerBuilder`]. + pub fn new() -> Self { + Self { + keypair: None, + supported_transports: HashSet::new(), + bandwidth_sink: None, + connection_limits_config: limits::ConnectionLimitsConfig::default(), + } + } + + /// Set the keypair + pub fn with_keypair(mut self, keypair: Keypair) -> Self { + self.keypair = Some(keypair); + self + } + + /// Set the supported transports + pub fn with_supported_transports( + mut self, + supported_transports: HashSet, + ) -> Self { + self.supported_transports = supported_transports; + self + } + + /// Set the bandwidth sink + pub fn with_bandwidth_sink(mut self, bandwidth_sink: BandwidthSink) -> Self { + self.bandwidth_sink = Some(bandwidth_sink); + self + } + + /// Set connection limits configuration. + pub fn with_connection_limits_config( + mut self, + connection_limits_config: limits::ConnectionLimitsConfig, + ) -> Self { + self.connection_limits_config = connection_limits_config; + self + } + + /// Build [`TransportManager`]. + pub fn build(self) -> TransportManager { + let keypair = self.keypair.unwrap_or_else(Keypair::generate); + let local_peer_id = PeerId::from_public_key(&keypair.public().into()); + let peers = Arc::new(RwLock::new(HashMap::new())); + let (cmd_tx, cmd_rx) = channel(256); + let (event_tx, event_rx) = channel(256); + let listen_addresses = Arc::new(RwLock::new(HashSet::new())); + let public_addresses = PublicAddresses::new(local_peer_id); + + let handle = TransportManagerHandle::new( + local_peer_id, + peers.clone(), + cmd_tx, + self.supported_transports, + listen_addresses.clone(), + public_addresses.clone(), + ); + + TransportManager { + local_peer_id, + keypair, + bandwidth_sink: self.bandwidth_sink.unwrap_or_else(BandwidthSink::new), + protocols: HashMap::new(), + protocol_names: HashSet::new(), + listen_addresses, + public_addresses, + next_connection_id: Arc::new(AtomicUsize::new(0usize)), + next_substream_id: Arc::new(AtomicUsize::new(0usize)), + transports: TransportContext::new(), + peers, + transport_manager_handle: handle, + event_rx, + cmd_rx, + event_tx, + pending_connections: HashMap::new(), + connection_limits: limits::ConnectionLimits::new(self.connection_limits_config), + opening_errors: HashMap::new(), + pending_accept: FuturesUnordered::new(), + } + } +} + +impl TransportManager { + /// Get iterator to installed protocols. + pub fn protocols(&self) -> impl Iterator { + self.protocols.keys() + } + + /// Get iterator to installed transports + pub fn installed_transports(&self) -> impl Iterator { + self.transports.keys() + } + + /// Get next connection ID. + fn next_connection_id(&self) -> ConnectionId { + let connection_id = self.next_connection_id.fetch_add(1usize, Ordering::Relaxed); + + ConnectionId::from(connection_id) + } + + /// Get the transport manager handle + pub fn transport_manager_handle(&self) -> TransportManagerHandle { + self.transport_manager_handle.clone() + } + + /// Register protocol to the [`crate::transport::manager::TransportManager`]. + /// + /// This allocates new context for the protocol and returns a handle + /// which the protocol can use the interact with the transport subsystem. + pub fn register_protocol( + &mut self, + protocol: ProtocolName, + fallback_names: Vec, + codec: ProtocolCodec, + keep_alive_timeout: Duration, + substream_keep_alive: SubstreamKeepAlive, + ) -> TransportService { + assert!(!self.protocol_names.contains(&protocol)); + + for fallback in &fallback_names { + if self.protocol_names.contains(fallback) { + panic!("duplicate fallback protocol given: {fallback:?}"); + } + } + + let (service, sender) = TransportService::new( + self.local_peer_id, + protocol.clone(), + fallback_names.clone(), + self.next_substream_id.clone(), + self.transport_manager_handle(), + keep_alive_timeout, + substream_keep_alive, + ); + + self.protocols.insert( + protocol.clone(), + ProtocolContext::new(codec, sender, fallback_names.clone(), substream_keep_alive), + ); + self.protocol_names.insert(protocol); + self.protocol_names.extend(fallback_names); + + service + } + + /// Unregister a protocol in response of the user dropping the protocol handle. + fn unregister_protocol(&mut self, protocol: ProtocolName) { + let Some(context) = self.protocols.remove(&protocol) else { + tracing::error!(target: LOG_TARGET, ?protocol, "Cannot unregister protocol, not registered"); + return; + }; + + for fallback in &context.fallback_names { + if !self.protocol_names.remove(fallback) { + tracing::error!(target: LOG_TARGET, ?fallback, ?protocol, "Cannot unregister fallback protocol, not registered"); + } + } + + tracing::info!( + target: LOG_TARGET, + ?protocol, + "Protocol fully unregistered" + ); + } + + /// Acquire `TransportHandle`. + pub fn transport_handle(&self, executor: Arc) -> TransportHandle { + TransportHandle { + tx: self.event_tx.clone(), + executor, + keypair: self.keypair.clone(), + protocols: self.protocols.clone(), + bandwidth_sink: self.bandwidth_sink.clone(), + next_substream_id: self.next_substream_id.clone(), + next_connection_id: self.next_connection_id.clone(), + } + } + + /// Register transport to `TransportManager`. + pub(crate) fn register_transport( + &mut self, + name: SupportedTransport, + transport: Box>, + ) { + tracing::debug!(target: LOG_TARGET, transport = ?name, "register transport"); + + self.transports.register_transport(name, transport); + self.transport_manager_handle.register_transport(name); + } + + /// Get the list of public addresses of the node. + pub(crate) fn public_addresses(&self) -> PublicAddresses { + self.public_addresses.clone() + } + + /// Register local listen address. + pub fn register_listen_address(&mut self, address: Multiaddr) { + assert!(!address.iter().any(|protocol| std::matches!(protocol, Protocol::P2p(_)))); + + let mut listen_addresses = self.listen_addresses.write(); + + listen_addresses.insert(address.clone()); + listen_addresses.insert(address.with(Protocol::P2p( + Multihash::from_bytes(&self.local_peer_id.to_bytes()).unwrap(), + ))); + } + + /// Add one or more known addresses for `peer`. + pub fn add_known_address( + &mut self, + peer: PeerId, + address: impl Iterator, + ) -> usize { + self.transport_manager_handle.add_known_address(&peer, address) + } + + /// Return multiple addresses to dial on supported protocols. + fn supported_transports_addresses( + addresses: &[Multiaddr], + ) -> HashMap> { + let mut transports = HashMap::>::new(); + + for address in addresses.iter().cloned() { + #[cfg(feature = "quic")] + if address.iter().any(|p| std::matches!(&p, Protocol::QuicV1)) { + transports.entry(SupportedTransport::Quic).or_default().push(address); + continue; + } + + #[cfg(feature = "websocket")] + if address.iter().any(|p| std::matches!(&p, Protocol::Ws(_) | Protocol::Wss(_))) { + transports.entry(SupportedTransport::WebSocket).or_default().push(address); + continue; + } + + transports.entry(SupportedTransport::Tcp).or_default().push(address); + } + + transports + } + + /// Dial peer using `PeerId`. + /// + /// Returns an error if the peer is unknown or the peer is already connected. + pub async fn dial(&mut self, peer: PeerId) -> crate::Result<()> { + // Don't alter the peer state if there's no capacity to dial. + let available_capacity = self.connection_limits.on_dial_address()?; + + if peer == self.local_peer_id { + return Err(Error::TriedToDialSelf); + } + let mut peers = self.peers.write(); + + let context = peers.entry(peer).or_default(); + + // Check if dialing is possible before allocating addresses. + match context.state.can_dial() { + StateDialResult::AlreadyConnected => return Err(Error::AlreadyConnected), + StateDialResult::DialingInProgress => return Ok(()), + StateDialResult::Ok => {} + }; + + // The addresses are sorted by score and contain the remote peer ID. + // We double checked above that the remote peer is not the local peer. + // Limit addresses by the available connection capacity. The transport layer + // handles dial concurrency via `max_parallel_dials`. + let dial_addresses = context.addresses.addresses(available_capacity); + if dial_addresses.is_empty() { + return Err(Error::NoAddressAvailable(peer)); + } + let connection_id = self.next_connection_id(); + + tracing::debug!( + target: LOG_TARGET, + ?connection_id, + addresses = ?dial_addresses, + "dial remote peer", + ); + + let transports = Self::supported_transports_addresses(&dial_addresses); + + // Dialing addresses will succeed because the `context.state.can_dial()` returned `Ok`. + let result = context.state.dial_addresses( + connection_id, + dial_addresses.iter().cloned().collect(), + transports.keys().cloned().collect(), + ); + if result != StateDialResult::Ok { + tracing::warn!( + target: LOG_TARGET, + ?peer, + ?connection_id, + state = ?context.state, + "invalid state for dialing", + ); + } + + for (transport, addresses) in transports { + if addresses.is_empty() { + continue; + } + + let Some(installed_transport) = self.transports.get_mut(&transport) else { + continue; + }; + + installed_transport.open(connection_id, addresses)?; + } + + self.pending_connections.insert(connection_id, peer); + + Ok(()) + } + + /// Dial peer using `Multiaddr`. + /// + /// Returns an error if address it not valid. + pub async fn dial_address(&mut self, address: Multiaddr) -> crate::Result<()> { + self.connection_limits.on_dial_address()?; + + let address_record = AddressRecord::from_multiaddr(address) + .ok_or(Error::AddressError(AddressError::PeerIdMissing))?; + + if self.listen_addresses.read().contains(address_record.as_ref()) { + return Err(Error::TriedToDialSelf); + } + + tracing::debug!(target: LOG_TARGET, address = ?address_record.address(), "dial address"); + + let mut protocol_stack = address_record.as_ref().iter(); + match protocol_stack + .next() + .ok_or_else(|| Error::TransportNotSupported(address_record.address().clone()))? + { + Protocol::Ip4(_) | Protocol::Ip6(_) => {} + Protocol::Dns(_) | Protocol::Dns4(_) | Protocol::Dns6(_) => {} + transport => { + tracing::error!( + target: LOG_TARGET, + ?transport, + "invalid transport, expected `ip4`/`ip6`" + ); + return Err(Error::TransportNotSupported( + address_record.address().clone(), + )); + } + }; + + let supported_transport = match protocol_stack + .next() + .ok_or_else(|| Error::TransportNotSupported(address_record.address().clone()))? + { + Protocol::Tcp(_) => match protocol_stack.next() { + #[cfg(feature = "websocket")] + Some(Protocol::Ws(_)) | Some(Protocol::Wss(_)) => SupportedTransport::WebSocket, + Some(Protocol::P2p(_)) => SupportedTransport::Tcp, + _ => + return Err(Error::TransportNotSupported( + address_record.address().clone(), + )), + }, + #[cfg(feature = "quic")] + Protocol::Udp(_) => match protocol_stack + .next() + .ok_or_else(|| Error::TransportNotSupported(address_record.address().clone()))? + { + Protocol::QuicV1 => SupportedTransport::Quic, + _ => { + tracing::debug!(target: LOG_TARGET, address = ?address_record.address(), "expected `quic-v1`"); + return Err(Error::TransportNotSupported( + address_record.address().clone(), + )); + } + }, + protocol => { + tracing::error!( + target: LOG_TARGET, + ?protocol, + "invalid protocol" + ); + + return Err(Error::TransportNotSupported( + address_record.address().clone(), + )); + } + }; + + // when constructing `AddressRecord`, `PeerId` was verified to be part of the address + let remote_peer_id = + PeerId::try_from_multiaddr(address_record.address()).expect("`PeerId` to exist"); + + // set connection id for the address record and put peer into `Dialing` state + let connection_id = self.next_connection_id(); + let dial_record = ConnectionRecord { + address: address_record.address().clone(), + connection_id, + }; + + { + let mut peers = self.peers.write(); + + let context = peers.entry(remote_peer_id).or_default(); + + // Keep the provided record around for possible future dials. + context.addresses.insert(address_record.clone()); + + match context.state.dial_single_address(dial_record) { + StateDialResult::AlreadyConnected => return Err(Error::AlreadyConnected), + StateDialResult::DialingInProgress => return Ok(()), + StateDialResult::Ok => {} + }; + } + + self.transports + .get_mut(&supported_transport) + .ok_or(Error::TransportNotSupported( + address_record.address().clone(), + ))? + .dial(connection_id, address_record.address().clone())?; + self.pending_connections.insert(connection_id, remote_peer_id); + + Ok(()) + } + + // Update the address on a dial failure. + fn update_address_on_dial_failure(&mut self, address: Multiaddr, error: &DialError) { + let mut peers = self.peers.write(); + + let score = AddressStore::error_score(error); + + // Extract the peer ID at this point to give `NegotiationError::PeerIdMismatch` a chance to + // propagate. + let peer_id = match address.iter().last() { + Some(Protocol::P2p(hash)) => PeerId::from_multihash(hash).ok(), + _ => None, + }; + let Some(peer_id) = peer_id else { + return; + }; + + // We need a valid context for this peer to keep track of failed addresses. + let context = peers.entry(peer_id).or_default(); + context.addresses.insert(AddressRecord::new(&peer_id, address.clone(), score)); + } + + /// Handle dial failure. + /// + /// The main purpose of this function is to advance the internal `PeerState`. + fn on_dial_failure(&mut self, connection_id: ConnectionId) -> crate::Result<()> { + tracing::trace!(target: LOG_TARGET, ?connection_id, "on dial failure"); + + let peer = self.pending_connections.remove(&connection_id).ok_or_else(|| { + tracing::error!( + target: LOG_TARGET, + ?connection_id, + "dial failed for a connection that doesn't exist", + ); + Error::InvalidState + })?; + + let mut peers = self.peers.write(); + let context = peers.entry(peer).or_default(); + let previous_state = context.state.clone(); + + if !context.state.on_dial_failure(connection_id) { + tracing::warn!( + target: LOG_TARGET, + ?peer, + ?connection_id, + state = ?context.state, + "invalid state for dial failure", + ); + } else { + tracing::trace!( + target: LOG_TARGET, + ?peer, + ?connection_id, + ?previous_state, + state = ?context.state, + "on dial failure completed" + ); + } + + Ok(()) + } + + fn on_pending_incoming_connection(&mut self) -> crate::Result<()> { + self.connection_limits.on_incoming()?; + Ok(()) + } + + /// Handle closed connection. + fn on_connection_closed( + &mut self, + peer: PeerId, + connection_id: ConnectionId, + ) -> Option { + tracing::trace!(target: LOG_TARGET, ?peer, ?connection_id, "connection closed"); + + self.connection_limits.on_connection_closed(connection_id); + + let mut peers = self.peers.write(); + let context = peers.entry(peer).or_default(); + + let previous_state = context.state.clone(); + let connection_closed = context.state.on_connection_closed(connection_id); + + if context.state == previous_state { + tracing::warn!( + target: LOG_TARGET, + ?peer, + ?connection_id, + state = ?context.state, + "invalid state for a closed connection", + ); + } else { + tracing::trace!( + target: LOG_TARGET, + ?peer, + ?connection_id, + ?previous_state, + state = ?context.state, + "on connection closed completed" + ); + } + + connection_closed.then_some(TransportEvent::ConnectionClosed { + peer, + connection_id, + }) + } + + /// Update the address on a connection established. + fn update_address_on_connection_established(&mut self, peer: PeerId, endpoint: &Endpoint) { + // The connection can be inbound or outbound. + // For the inbound connection type, in most cases, the remote peer dialed + // with an ephemeral port which it might not be listening on. + // Therefore, we only insert the address into the store if we're the dialer. + if endpoint.is_listener() { + return; + } + + let mut peers = self.peers.write(); + + let record = AddressRecord::new( + &peer, + endpoint.address().clone(), + scores::CONNECTION_ESTABLISHED, + ); + + let context = peers.entry(peer).or_default(); + context.addresses.insert(record); + } + + fn on_connection_established( + &mut self, + peer: PeerId, + endpoint: &Endpoint, + ) -> crate::Result { + self.update_address_on_connection_established(peer, endpoint); + + if let Some(dialed_peer) = self.pending_connections.remove(&endpoint.connection_id()) { + if dialed_peer != peer { + tracing::warn!( + target: LOG_TARGET, + ?dialed_peer, + ?peer, + ?endpoint, + "peer ids do not match but transport was supposed to reject connection" + ); + debug_assert!(false); + return Err(Error::InvalidState); + } + }; + + // Reject the connection if exceeded limits. + if let Err(error) = self.connection_limits.can_accept_connection(endpoint.is_listener()) { + tracing::debug!( + target: LOG_TARGET, + ?peer, + ?endpoint, + ?error, + "connection limit exceeded, rejecting connection", + ); + return Ok(ConnectionEstablishedResult::Reject); + } + + let mut peers = self.peers.write(); + let context = peers.entry(peer).or_default(); + + let previous_state = context.state.clone(); + let connection_accepted = context + .state + .on_connection_established(ConnectionRecord::from_endpoint(peer, endpoint)); + + tracing::trace!( + target: LOG_TARGET, + ?peer, + ?endpoint, + ?previous_state, + state = ?context.state, + "on connection established completed" + ); + + if connection_accepted { + self.connection_limits + .accept_established_connection(endpoint.connection_id(), endpoint.is_listener()); + + // Cancel all pending dials if the connection was established. + if let PeerState::Opening { + connection_id, + transports, + .. + } = previous_state + { + // cancel all pending dials + transports.iter().for_each(|transport| { + self.transports + .get_mut(transport) + .expect("transport to exist") + .cancel(connection_id); + }); + + // since an inbound connection was removed, the outbound connection can be + // removed from pending dials + // + // This may race in the following scenario: + // + // T0: we open address X on protocol TCP + // T1: remote peer opens a connection with us + // T2: address X is dialed and event is propagated from TCP to transport manager + // T3: `on_connection_established` is called for T1 and pending connections cleared + // T4: event from T2 is delivered. + // + // TODO: see https://github.com/paritytech/litep2p/issues/276 for more details. + self.pending_connections.remove(&connection_id); + } + + return Ok(ConnectionEstablishedResult::Accept); + } + + Ok(ConnectionEstablishedResult::Reject) + } + + fn on_connection_opened( + &mut self, + transport: SupportedTransport, + connection_id: ConnectionId, + address: Multiaddr, + ) -> crate::Result<()> { + let Some(peer) = self.pending_connections.remove(&connection_id) else { + tracing::warn!( + target: LOG_TARGET, + ?connection_id, + ?transport, + ?address, + "connection opened but dial record doesn't exist", + ); + + debug_assert!(false); + return Err(Error::InvalidState); + }; + + let mut peers = self.peers.write(); + let context = peers.entry(peer).or_default(); + + // Keep track of the address. + context.addresses.insert(AddressRecord::new( + &peer, + address.clone(), + scores::CONNECTION_ESTABLISHED, + )); + + let previous_state = context.state.clone(); + let record = ConnectionRecord::new(peer, address.clone(), connection_id); + let state_advanced = context.state.on_connection_opened(record); + if !state_advanced { + tracing::warn!( + target: LOG_TARGET, + ?peer, + ?connection_id, + state = ?context.state, + "connection opened but `PeerState` is not `Opening`", + ); + return Err(Error::InvalidState); + } + + // State advanced from `Opening` to `Dialing`. + let PeerState::Opening { + connection_id, + transports, + .. + } = previous_state + else { + tracing::warn!( + target: LOG_TARGET, + ?peer, + ?connection_id, + state = ?context.state, + "State mismatch in opening expected by peer state transition", + ); + return Err(Error::InvalidState); + }; + + // Cancel open attempts for other transports as connection already exists. + for transport in transports.iter() { + self.transports + .get_mut(transport) + .expect("transport to exist") + .cancel(connection_id); + } + + let negotiation = self + .transports + .get_mut(&transport) + .expect("transport to exist") + .negotiate(connection_id); + + match negotiation { + Ok(()) => { + tracing::trace!( + target: LOG_TARGET, + ?peer, + ?connection_id, + ?transport, + "negotiation started" + ); + + self.pending_connections.insert(connection_id, peer); + + Ok(()) + } + Err(err) => { + tracing::warn!( + target: LOG_TARGET, + ?peer, + ?connection_id, + ?err, + "failed to negotiate connection", + ); + context.state = PeerState::Disconnected { dial_record: None }; + Err(Error::InvalidState) + } + } + } + + /// Handle open failure for dialing attempt for `transport` + fn on_open_failure( + &mut self, + transport: SupportedTransport, + connection_id: ConnectionId, + ) -> crate::Result> { + let Some(peer) = self.pending_connections.get(&connection_id).copied() else { + tracing::warn!( + target: LOG_TARGET, + ?connection_id, + "open failure but dial record doesn't exist", + ); + return Err(Error::InvalidState); + }; + + let mut peers = self.peers.write(); + let context = peers.entry(peer).or_default(); + + let previous_state = context.state.clone(); + let last_transport = context.state.on_open_failure(transport); + + if context.state == previous_state { + tracing::warn!( + target: LOG_TARGET, + ?peer, + ?connection_id, + ?transport, + state = ?context.state, + "invalid state for a open failure", + ); + + return Err(Error::InvalidState); + } + + tracing::trace!( + target: LOG_TARGET, + ?peer, + ?connection_id, + ?transport, + ?previous_state, + state = ?context.state, + "on open failure transition completed" + ); + + if last_transport { + tracing::trace!(target: LOG_TARGET, ?peer, ?connection_id, "open failure for last transport"); + // Remove the pending connection. + self.pending_connections.remove(&connection_id); + // Provide the peer to notify the open failure. + return Ok(Some(peer)); + } + + Ok(None) + } + + /// Poll next event from [`crate::transport::manager::TransportManager`]. + pub async fn next(&mut self) -> Option { + loop { + tokio::select! { + (peer, endpoint, result) = self.pending_accept.select_next_some(), if !self.pending_accept.is_empty() => { + match result { + Ok(()) => { + tracing::trace!( + target: LOG_TARGET, + ?peer, + ?endpoint, + "connection accepted and protocols notified", + ); + + return Some(TransportEvent::ConnectionEstablished { peer, endpoint }); + } + Err(error) => { + // The pending accept future has failed to inform one of the + // installed protocols about the connection. This can happen when the + // node is shutting down or when the user has dropped the long running protocol. + // To err on the safe side, roll back the state modification done in `on_connection_established`. + self.on_connection_closed(peer, endpoint.connection_id()); + + tracing::error!( + target: LOG_TARGET, + ?peer, + ?endpoint, + ?error, + "failed to notify protocols about connection", + ); + } + } + } + event = self.event_rx.recv() => { + let Some(event) = event else { + tracing::error!( + target: LOG_TARGET, + "Installed protocols terminated, ignore if the node is stopping" + ); + + return None; + }; + + match event { + TransportManagerEvent::ConnectionClosed { + peer, + connection: connection_id, + } => if let Some(event) = self.on_connection_closed(peer, connection_id) { + return Some(event); + } + }; + }, + + command = self.cmd_rx.recv() =>{ + let Some(command) = command else { + tracing::error!( + target: LOG_TARGET, + "User command terminated, ignore if the node is stopping" + ); + + return None; + }; + + match command { + InnerTransportManagerCommand::DialPeer { peer } => { + if let Err(error) = self.dial(peer).await { + tracing::debug!(target: LOG_TARGET, ?peer, ?error, "failed to dial peer") + } + } + InnerTransportManagerCommand::DialAddress { address } => { + if let Err(error) = self.dial_address(address).await { + tracing::debug!(target: LOG_TARGET, ?error, "failed to dial peer") + } + } + InnerTransportManagerCommand::UnregisterProtocol { protocol } => { + self.unregister_protocol(protocol); + } + } + }, + + event = self.transports.next() => { + let Some((transport, event)) = event else { + tracing::error!( + target: LOG_TARGET, + "Installed transports terminated, ignore if the node is stopping" + ); + + return None; + }; + + + match event { + TransportEvent::DialFailure { connection_id, address, error } => { + tracing::debug!( + target: LOG_TARGET, + ?connection_id, + ?address, + ?error, + "failed to dial peer", + ); + + // Update the addresses on dial failure regardless of the + // internal peer context state. This ensures a robust address tracking + // while taking into account the error type. + self.update_address_on_dial_failure(address.clone(), &error); + + if let Ok(()) = self.on_dial_failure(connection_id) { + match address.iter().last() { + Some(Protocol::P2p(hash)) => match PeerId::from_multihash(hash) { + Ok(peer) => { + tracing::trace!( + target: LOG_TARGET, + ?connection_id, + ?error, + ?address, + num_protocols = self.protocols.len(), + "dial failure, notify protocols", + ); + + for (protocol, context) in &self.protocols { + tracing::trace!( + target: LOG_TARGET, + ?connection_id, + ?error, + ?address, + ?protocol, + "dial failure, notify protocol", + ); + match context.tx.try_send(InnerTransportEvent::DialFailure { + peer, + addresses: vec![address.clone()], + }) { + Ok(()) => {} + Err(_) => { + tracing::trace!( + target: LOG_TARGET, + ?connection_id, + ?error, + ?address, + ?protocol, + "dial failure, channel to protocol clogged, use await", + ); + let _ = context + .tx + .send(InnerTransportEvent::DialFailure { + peer, + addresses: vec![address.clone()], + }) + .await; + } + } + } + + tracing::trace!( + target: LOG_TARGET, + ?connection_id, + ?error, + ?address, + "all protocols notified", + ); + } + Err(error) => { + tracing::warn!( + target: LOG_TARGET, + ?address, + ?connection_id, + ?error, + "failed to parse `PeerId` from `Multiaddr`", + ); + debug_assert!(false); + } + }, + _ => { + tracing::warn!(target: LOG_TARGET, ?address, ?connection_id, "address doesn't contain `PeerId`"); + debug_assert!(false); + } + } + + return Some(TransportEvent::DialFailure { + connection_id, + address, + error, + }) + } + } + TransportEvent::ConnectionEstablished { peer, endpoint } => { + self.opening_errors.remove(&endpoint.connection_id()); + + match self.on_connection_established(peer, &endpoint) { + Err(error) => { + tracing::debug!( + target: LOG_TARGET, + ?peer, + ?endpoint, + ?error, + "failed to handle established connection", + ); + + let _ = self + .transports + .get_mut(&transport) + .expect("transport to exist") + .reject(endpoint.connection_id()); + } + Ok(ConnectionEstablishedResult::Accept) => { + tracing::trace!( + target: LOG_TARGET, + ?peer, + ?endpoint, + "accept connection", + ); + + match self + .transports + .get_mut(&transport) + .expect("transport to exist") + .accept(endpoint.connection_id()) + { + Ok(future) => { + // A ConnectionEstablished is propagated to the user once + // all protocols have been notified. + self.pending_accept.push(Box::pin(async move { + let result = future.await; + (peer, endpoint, result) + })); + } + Err(error) => { + // Roll back the state modification done in `on_connection_established` by + // simulating a closed connection. The transport returns an error + // while accepting the connection, which can happen if the transport is + // already closed or the connection is dropped before the accept call. + self.on_connection_closed(peer, endpoint.connection_id()); + + tracing::debug!( + target: LOG_TARGET, + ?peer, + ?endpoint, + ?error, + "failed to accept connection", + ); + } + } + } + Ok(ConnectionEstablishedResult::Reject) => { + tracing::trace!( + target: LOG_TARGET, + ?peer, + ?endpoint, + "reject connection", + ); + + let _ = self + .transports + .get_mut(&transport) + .expect("transport to exist") + .reject(endpoint.connection_id()); + } + } + } + TransportEvent::ConnectionOpened { connection_id, address, errors } => { + self.opening_errors.remove(&connection_id); + + for (addr, error) in &errors { + self.update_address_on_dial_failure(addr.clone(), error); + } + + if let Err(error) = self.on_connection_opened(transport, connection_id, address) { + tracing::debug!( + target: LOG_TARGET, + ?connection_id, + ?error, + "failed to handle opened connection", + ); + } + } + TransportEvent::OpenFailure { connection_id, errors } => { + for (address, error) in &errors { + self.update_address_on_dial_failure(address.clone(), error); + } + + match self.on_open_failure(transport, connection_id) { + Err(error) => tracing::debug!( + target: LOG_TARGET, + ?connection_id, + ?error, + "failed to handle opened connection", + ), + Ok(Some(peer)) => { + tracing::trace!( + target: LOG_TARGET, + ?peer, + ?connection_id, + num_protocols = self.protocols.len(), + "inform protocols about open failure", + ); + + let addresses = errors + .iter() + .map(|(address, _)| address.clone()) + .collect::>(); + + for (protocol, context) in &self.protocols { + let _ = match context + .tx + .try_send(InnerTransportEvent::DialFailure { + peer, + addresses: addresses.clone(), + }) { + Ok(_) => Ok(()), + Err(_) => { + tracing::trace!( + target: LOG_TARGET, + ?peer, + %protocol, + ?connection_id, + "call to protocol would block try sending in a blocking way", + ); + + context + .tx + .send(InnerTransportEvent::DialFailure { + peer, + addresses: addresses.clone(), + }) + .await + } + }; + } + + let mut grouped_errors = self.opening_errors.remove(&connection_id).unwrap_or_default(); + grouped_errors.extend(errors); + return Some(TransportEvent::OpenFailure { connection_id, errors: grouped_errors }); + } + Ok(None) => { + tracing::trace!( + target: LOG_TARGET, + ?connection_id, + "open failure, but not the last transport", + ); + + self.opening_errors.entry(connection_id).or_default().extend(errors); + } + } + }, + TransportEvent::PendingInboundConnection { connection_id } => { + if self.on_pending_incoming_connection().is_ok() { + tracing::trace!( + target: LOG_TARGET, + ?connection_id, + "accept pending incoming connection", + ); + + let _ = self + .transports + .get_mut(&transport) + .expect("transport to exist") + .accept_pending(connection_id); + } else { + tracing::debug!( + target: LOG_TARGET, + ?connection_id, + "reject pending incoming connection", + ); + + let _ = self + .transports + .get_mut(&transport) + .expect("transport to exist") + .reject_pending(connection_id); + } + }, + event => panic!("event not supported: {event:?}"), + } + }, + } + } + } +} + +#[cfg(test)] +mod tests { + use crate::transport::manager::{address::AddressStore, peer_state::SecondaryOrDialing}; + use limits::ConnectionLimitsConfig; + + use multihash::Multihash; + + use super::*; + use crate::{ + crypto::ed25519::Keypair, + executor::DefaultExecutor, + transport::{dummy::DummyTransport, KEEP_ALIVE_TIMEOUT}, + }; + #[cfg(feature = "websocket")] + use std::borrow::Cow; + use std::{ + net::{Ipv4Addr, Ipv6Addr}, + sync::Arc, + usize, + }; + + /// Setup TCP address and connection id. + fn setup_dial_addr(peer: PeerId, connection_id: u16) -> (Multiaddr, ConnectionId) { + let dial_address = Multiaddr::empty() + .with(Protocol::Ip4(Ipv4Addr::new(127, 0, 0, 1))) + .with(Protocol::Tcp(8888 + connection_id)) + .with(Protocol::P2p( + Multihash::from_bytes(&peer.to_bytes()).unwrap(), + )); + let connection_id = ConnectionId::from(connection_id as usize); + + (dial_address, connection_id) + } + + #[tokio::test] + #[cfg(feature = "websocket")] + #[cfg(feature = "quic")] + async fn transport_events() { + struct MockTransport { + rx: tokio::sync::mpsc::Receiver, + } + + impl MockTransport { + fn new(rx: tokio::sync::mpsc::Receiver) -> Self { + Self { rx } + } + } + + impl Transport for MockTransport { + fn dial( + &mut self, + _connection_id: ConnectionId, + _address: Multiaddr, + ) -> crate::Result<()> { + Ok(()) + } + + fn accept( + &mut self, + _connection_id: ConnectionId, + ) -> crate::Result>> { + Ok(Box::pin(async { Ok(()) })) + } + + fn accept_pending(&mut self, _connection_id: ConnectionId) -> crate::Result<()> { + Ok(()) + } + + fn reject_pending(&mut self, _connection_id: ConnectionId) -> crate::Result<()> { + Ok(()) + } + + fn reject(&mut self, _connection_id: ConnectionId) -> crate::Result<()> { + Ok(()) + } + + fn open( + &mut self, + _connection_id: ConnectionId, + _addresses: Vec, + ) -> crate::Result<()> { + Ok(()) + } + + fn negotiate(&mut self, _connection_id: ConnectionId) -> crate::Result<()> { + Ok(()) + } + + fn cancel(&mut self, _connection_id: ConnectionId) {} + } + + impl Stream for MockTransport { + type Item = TransportEvent; + fn poll_next( + mut self: Pin<&mut Self>, + cx: &mut Context<'_>, + ) -> Poll> { + self.rx.poll_recv(cx) + } + } + + let mut transports = TransportContext::new(); + + let (tx_tcp, rx) = tokio::sync::mpsc::channel(8); + let transport = MockTransport::new(rx); + transports.register_transport(SupportedTransport::Tcp, Box::new(transport)); + + let (tx_ws, rx) = tokio::sync::mpsc::channel(8); + let transport = MockTransport::new(rx); + transports.register_transport(SupportedTransport::WebSocket, Box::new(transport)); + + let (tx_quic, rx) = tokio::sync::mpsc::channel(8); + let transport = MockTransport::new(rx); + transports.register_transport(SupportedTransport::Quic, Box::new(transport)); + + assert_eq!(transports.index, 0); + assert_eq!(transports.transports.len(), 3); + // No items. + futures::future::poll_fn(|cx| match transports.poll_next_unpin(cx) { + std::task::Poll::Ready(_) => panic!("didn't expect event from `TransportService`"), + std::task::Poll::Pending => std::task::Poll::Ready(()), + }) + .await; + assert_eq!(transports.index, 0); + + // Websocket events. + tx_ws + .send(TransportEvent::PendingInboundConnection { + connection_id: ConnectionId::from(1), + }) + .await + .expect("channel to be open"); + + let event = futures::future::poll_fn(|cx| transports.poll_next_unpin(cx)) + .await + .expect("expected event"); + assert_eq!(event.0, SupportedTransport::WebSocket); + assert!(std::matches!( + event.1, + TransportEvent::PendingInboundConnection { .. } + )); + assert_eq!(transports.index, 2); + + // TCP events. + tx_tcp + .send(TransportEvent::PendingInboundConnection { + connection_id: ConnectionId::from(2), + }) + .await + .expect("channel to be open"); + + let event = futures::future::poll_fn(|cx| transports.poll_next_unpin(cx)) + .await + .expect("expected event"); + assert_eq!(event.0, SupportedTransport::Tcp); + assert!(std::matches!( + event.1, + TransportEvent::PendingInboundConnection { .. } + )); + assert_eq!(transports.index, 1); + + // QUIC events + tx_quic + .send(TransportEvent::PendingInboundConnection { + connection_id: ConnectionId::from(3), + }) + .await + .expect("channel to be open"); + + let event = futures::future::poll_fn(|cx| transports.poll_next_unpin(cx)) + .await + .expect("expected event"); + assert_eq!(event.0, SupportedTransport::Quic); + assert!(std::matches!( + event.1, + TransportEvent::PendingInboundConnection { .. } + )); + assert_eq!(transports.index, 0); + + // All three transports produce events. + tx_ws + .send(TransportEvent::PendingInboundConnection { + connection_id: ConnectionId::from(4), + }) + .await + .expect("channel to be open"); + tx_tcp + .send(TransportEvent::PendingInboundConnection { + connection_id: ConnectionId::from(5), + }) + .await + .expect("channel to be open"); + tx_quic + .send(TransportEvent::PendingInboundConnection { + connection_id: ConnectionId::from(6), + }) + .await + .expect("channel to be open"); + + let event = futures::future::poll_fn(|cx| transports.poll_next_unpin(cx)) + .await + .expect("expected event"); + assert_eq!(event.0, SupportedTransport::Tcp); + assert!(std::matches!( + event.1, + TransportEvent::PendingInboundConnection { .. } + )); + assert_eq!(transports.index, 1); + + let event = futures::future::poll_fn(|cx| transports.poll_next_unpin(cx)) + .await + .expect("expected event"); + assert_eq!(event.0, SupportedTransport::WebSocket); + assert!(std::matches!( + event.1, + TransportEvent::PendingInboundConnection { .. } + )); + assert_eq!(transports.index, 2); + + let event = futures::future::poll_fn(|cx| transports.poll_next_unpin(cx)) + .await + .expect("expected event"); + assert_eq!(event.0, SupportedTransport::Quic); + assert!(std::matches!( + event.1, + TransportEvent::PendingInboundConnection { .. } + )); + assert_eq!(transports.index, 0); + } + + #[test] + #[should_panic] + #[cfg(debug_assertions)] + fn duplicate_protocol() { + let mut manager = TransportManagerBuilder::new().build(); + + manager.register_protocol( + ProtocolName::from("/notif/1"), + Vec::new(), + ProtocolCodec::UnsignedVarint(None), + KEEP_ALIVE_TIMEOUT, + SubstreamKeepAlive::Yes, + ); + manager.register_protocol( + ProtocolName::from("/notif/1"), + Vec::new(), + ProtocolCodec::UnsignedVarint(None), + KEEP_ALIVE_TIMEOUT, + SubstreamKeepAlive::Yes, + ); + } + + #[test] + #[should_panic] + #[cfg(debug_assertions)] + fn fallback_protocol_as_duplicate_main_protocol() { + let mut manager = TransportManagerBuilder::new().build(); + + manager.register_protocol( + ProtocolName::from("/notif/1"), + Vec::new(), + ProtocolCodec::UnsignedVarint(None), + KEEP_ALIVE_TIMEOUT, + SubstreamKeepAlive::Yes, + ); + manager.register_protocol( + ProtocolName::from("/notif/2"), + vec![ + ProtocolName::from("/notif/2/new"), + ProtocolName::from("/notif/1"), + ], + ProtocolCodec::UnsignedVarint(None), + KEEP_ALIVE_TIMEOUT, + SubstreamKeepAlive::Yes, + ); + } + + #[test] + #[should_panic] + #[cfg(debug_assertions)] + fn duplicate_fallback_protocol() { + let mut manager = TransportManagerBuilder::new().build(); + + manager.register_protocol( + ProtocolName::from("/notif/1"), + vec![ + ProtocolName::from("/notif/1/new"), + ProtocolName::from("/notif/1"), + ], + ProtocolCodec::UnsignedVarint(None), + KEEP_ALIVE_TIMEOUT, + SubstreamKeepAlive::Yes, + ); + manager.register_protocol( + ProtocolName::from("/notif/2"), + vec![ + ProtocolName::from("/notif/2/new"), + ProtocolName::from("/notif/1/new"), + ], + ProtocolCodec::UnsignedVarint(None), + KEEP_ALIVE_TIMEOUT, + SubstreamKeepAlive::Yes, + ); + } + + #[test] + #[should_panic] + #[cfg(debug_assertions)] + fn duplicate_transport() { + let mut manager = TransportManagerBuilder::new().build(); + + manager.register_transport(SupportedTransport::Tcp, Box::new(DummyTransport::new())); + manager.register_transport(SupportedTransport::Tcp, Box::new(DummyTransport::new())); + } + + #[tokio::test] + async fn tried_to_self_using_peer_id() { + let keypair = Keypair::generate(); + let local_peer_id = PeerId::from_public_key(&keypair.public().into()); + let mut manager = TransportManagerBuilder::new().with_keypair(keypair).build(); + + assert!(manager.dial(local_peer_id).await.is_err()); + } + + #[tokio::test] + async fn try_to_dial_over_disabled_transport() { + let mut manager = TransportManagerBuilder::new().build(); + let _handle = manager.transport_handle(Arc::new(DefaultExecutor {})); + manager.register_transport(SupportedTransport::Tcp, Box::new(DummyTransport::new())); + + let address = Multiaddr::empty() + .with(Protocol::Ip4(Ipv4Addr::new(127, 0, 0, 1))) + .with(Protocol::Udp(8888)) + .with(Protocol::QuicV1) + .with(Protocol::P2p( + Multihash::from_bytes(&PeerId::random().to_bytes()).unwrap(), + )); + + assert!(std::matches!( + manager.dial_address(address).await, + Err(Error::TransportNotSupported(_)) + )); + } + + #[tokio::test] + async fn successful_dial_reported_to_transport_manager() { + let _ = tracing_subscriber::fmt() + .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) + .try_init(); + + let mut manager = TransportManagerBuilder::new().build(); + let peer = PeerId::random(); + let dial_address = Multiaddr::empty() + .with(Protocol::Ip4(Ipv4Addr::new(127, 0, 0, 1))) + .with(Protocol::Tcp(8888)) + .with(Protocol::P2p( + Multihash::from_bytes(&peer.to_bytes()).unwrap(), + )); + + let transport = Box::new({ + let mut transport = DummyTransport::new(); + transport.inject_event(TransportEvent::ConnectionEstablished { + peer, + endpoint: Endpoint::dialer(dial_address.clone(), ConnectionId::from(0usize)), + }); + transport + }); + manager.register_transport(SupportedTransport::Tcp, transport); + + assert!(manager.dial_address(dial_address.clone()).await.is_ok()); + assert!(!manager.pending_connections.is_empty()); + + { + let peers = manager.peers.read(); + + match peers.get(&peer) { + Some(PeerContext { + state: PeerState::Dialing { .. }, + .. + }) => {} + state => panic!("invalid state for peer: {state:?}"), + } + } + + match manager.next().await.unwrap() { + TransportEvent::ConnectionEstablished { + peer: event_peer, + endpoint: event_endpoint, + .. + } => { + assert_eq!(peer, event_peer); + assert_eq!( + event_endpoint, + Endpoint::dialer(dial_address.clone(), ConnectionId::from(0usize)) + ) + } + event => panic!("invalid event: {event:?}"), + } + } + + #[tokio::test] + async fn try_to_dial_same_peer_twice() { + let _ = tracing_subscriber::fmt() + .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) + .try_init(); + + let mut manager = TransportManagerBuilder::new().build(); + let _handle = manager.transport_handle(Arc::new(DefaultExecutor {})); + manager.register_transport(SupportedTransport::Tcp, Box::new(DummyTransport::new())); + + let peer = PeerId::random(); + let dial_address = Multiaddr::empty() + .with(Protocol::Ip4(Ipv4Addr::new(127, 0, 0, 1))) + .with(Protocol::Tcp(8888)) + .with(Protocol::P2p( + Multihash::from_bytes(&peer.to_bytes()).unwrap(), + )); + + assert!(manager.dial_address(dial_address.clone()).await.is_ok()); + assert_eq!(manager.pending_connections.len(), 1); + + assert!(manager.dial_address(dial_address.clone()).await.is_ok()); + assert_eq!(manager.pending_connections.len(), 1); + } + + #[tokio::test] + async fn try_to_dial_same_peer_twice_diffrent_address() { + let _ = tracing_subscriber::fmt() + .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) + .try_init(); + + let mut manager = TransportManagerBuilder::new().build(); + let _handle = manager.transport_handle(Arc::new(DefaultExecutor {})); + manager.register_transport(SupportedTransport::Tcp, Box::new(DummyTransport::new())); + + let peer = PeerId::random(); + + assert!(manager + .dial_address( + Multiaddr::empty() + .with(Protocol::Ip4(Ipv4Addr::new(127, 0, 0, 1))) + .with(Protocol::Tcp(8888)) + .with(Protocol::P2p( + Multihash::from_bytes(&peer.to_bytes()).unwrap(), + )) + ) + .await + .is_ok()); + assert_eq!(manager.pending_connections.len(), 1); + + assert!(manager + .dial_address( + Multiaddr::empty() + .with(Protocol::Ip6(Ipv6Addr::new(0, 0, 0, 0, 0, 0, 0, 1))) + .with(Protocol::Tcp(8888)) + .with(Protocol::P2p( + Multihash::from_bytes(&peer.to_bytes()).unwrap(), + )) + ) + .await + .is_ok()); + assert_eq!(manager.pending_connections.len(), 1); + } + + #[tokio::test] + async fn dial_non_existent_peer() { + let _ = tracing_subscriber::fmt() + .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) + .try_init(); + + let mut manager = TransportManagerBuilder::new().build(); + let _handle = manager.transport_handle(Arc::new(DefaultExecutor {})); + manager.register_transport(SupportedTransport::Tcp, Box::new(DummyTransport::new())); + + assert!(manager.dial(PeerId::random()).await.is_err()); + } + + #[tokio::test] + async fn dial_non_peer_with_no_known_addresses() { + let _ = tracing_subscriber::fmt() + .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) + .try_init(); + + let mut manager = TransportManagerBuilder::new().build(); + let _handle = manager.transport_handle(Arc::new(DefaultExecutor {})); + manager.register_transport(SupportedTransport::Tcp, Box::new(DummyTransport::new())); + + let peer = PeerId::random(); + manager.peers.write().insert( + peer, + PeerContext { + state: PeerState::Disconnected { dial_record: None }, + addresses: AddressStore::new(), + }, + ); + + assert!(manager.dial(peer).await.is_err()); + } + + #[tokio::test] + async fn check_supported_transport_when_adding_known_address() { + let _ = tracing_subscriber::fmt() + .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) + .try_init(); + + let mut transports = HashSet::new(); + transports.insert(SupportedTransport::Tcp); + #[cfg(feature = "quic")] + transports.insert(SupportedTransport::Quic); + + let manager = TransportManagerBuilder::new().with_supported_transports(transports).build(); + + let handle = manager.transport_manager_handle; + + // ipv6 + let address = Multiaddr::empty() + .with(Protocol::Ip6(Ipv6Addr::new(0, 0, 0, 0, 0, 0, 0, 1))) + .with(Protocol::Tcp(8888)) + .with(Protocol::P2p( + Multihash::from_bytes(&PeerId::random().to_bytes()).unwrap(), + )); + assert!(handle.supported_transport(&address)); + + // ipv4 + let address = Multiaddr::empty() + .with(Protocol::Ip4(Ipv4Addr::new(127, 0, 0, 1))) + .with(Protocol::Tcp(8888)) + .with(Protocol::P2p( + Multihash::from_bytes(&PeerId::random().to_bytes()).unwrap(), + )); + assert!(handle.supported_transport(&address)); + + // quic + let address = Multiaddr::empty() + .with(Protocol::Ip4(Ipv4Addr::new(127, 0, 0, 1))) + .with(Protocol::Udp(8888)) + .with(Protocol::QuicV1) + .with(Protocol::P2p( + Multihash::from_bytes(&PeerId::random().to_bytes()).unwrap(), + )); + #[cfg(feature = "quic")] + assert!(handle.supported_transport(&address)); + #[cfg(not(feature = "quic"))] + assert!(!handle.supported_transport(&address)); + + // websocket + let address = Multiaddr::empty() + .with(Protocol::Ip4(Ipv4Addr::new(127, 0, 0, 1))) + .with(Protocol::Tcp(8888)) + .with(Protocol::Ws(std::borrow::Cow::Owned("/".to_string()))); + assert!(!handle.supported_transport(&address)); + + // websocket secure + let address = Multiaddr::empty() + .with(Protocol::Ip4(Ipv4Addr::new(127, 0, 0, 1))) + .with(Protocol::Tcp(8888)) + .with(Protocol::Wss(std::borrow::Cow::Owned("/".to_string()))); + assert!(!handle.supported_transport(&address)); + } + + // local node tried to dial a node and it failed but in the mean + // time the remote node dialed local node and that succeeded. + #[tokio::test] + async fn on_dial_failure_already_connected() { + let _ = tracing_subscriber::fmt() + .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) + .try_init(); + + let mut manager = TransportManagerBuilder::new().build(); + let _handle = manager.transport_handle(Arc::new(DefaultExecutor {})); + manager.register_transport(SupportedTransport::Tcp, Box::new(DummyTransport::new())); + + let peer = PeerId::random(); + let dial_address = Multiaddr::empty() + .with(Protocol::Ip4(Ipv4Addr::new(127, 0, 0, 1))) + .with(Protocol::Tcp(8888)) + .with(Protocol::P2p( + Multihash::from_bytes(&peer.to_bytes()).unwrap(), + )); + let connect_address = Multiaddr::empty() + .with(Protocol::Ip4(Ipv4Addr::new(192, 168, 1, 173))) + .with(Protocol::Tcp(8888)) + .with(Protocol::P2p( + Multihash::from_bytes(&peer.to_bytes()).unwrap(), + )); + assert!(manager.dial_address(dial_address.clone()).await.is_ok()); + assert_eq!(manager.pending_connections.len(), 1); + + match &manager.peers.read().get(&peer).unwrap().state { + PeerState::Dialing { dial_record } => { + assert_eq!(dial_record.address, dial_address); + } + state => panic!("invalid state for peer: {state:?}"), + } + + // remote peer connected to local node from a different address that was dialed + manager + .on_connection_established( + peer, + &Endpoint::dialer(connect_address, ConnectionId::from(1usize)), + ) + .unwrap(); + + // dialing the peer failed + manager.on_dial_failure(ConnectionId::from(0usize)).unwrap(); + + let peers = manager.peers.read(); + let peer = peers.get(&peer).unwrap(); + + match &peer.state { + PeerState::Connected { secondary, .. } => { + assert!(secondary.is_none()); + assert!(peer.addresses.addresses.contains_key(&dial_address)); + } + state => panic!("invalid state: {state:?}"), + } + } + + // local node tried to dial a node and it failed but in the mean + // time the remote node dialed local node and that succeeded. + // + // while the dial was still in progresss, the remote node disconnected after which + // the dial failure was reported. + #[tokio::test] + async fn on_dial_failure_already_connected_and_disconnected() { + let _ = tracing_subscriber::fmt() + .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) + .try_init(); + + let mut manager = TransportManagerBuilder::new().build(); + let _handle = manager.transport_handle(Arc::new(DefaultExecutor {})); + manager.register_transport(SupportedTransport::Tcp, Box::new(DummyTransport::new())); + + let peer = PeerId::random(); + let dial_address = Multiaddr::empty() + .with(Protocol::Ip4(Ipv4Addr::new(127, 0, 0, 1))) + .with(Protocol::Tcp(8888)) + .with(Protocol::P2p( + Multihash::from_bytes(&peer.to_bytes()).unwrap(), + )); + let connect_address = Multiaddr::empty() + .with(Protocol::Ip4(Ipv4Addr::new(192, 168, 1, 173))) + .with(Protocol::Tcp(8888)) + .with(Protocol::P2p( + Multihash::from_bytes(&peer.to_bytes()).unwrap(), + )); + assert!(manager.dial_address(dial_address.clone()).await.is_ok()); + assert_eq!(manager.pending_connections.len(), 1); + + match &manager.peers.read().get(&peer).unwrap().state { + PeerState::Dialing { dial_record } => { + assert_eq!(dial_record.address, dial_address); + } + state => panic!("invalid state for peer: {state:?}"), + } + + // remote peer connected to local node from a different address that was dialed + manager + .on_connection_established( + peer, + &Endpoint::listener(connect_address, ConnectionId::from(1usize)), + ) + .unwrap(); + + // connection to remote was closed while the dial was still in progress + manager.on_connection_closed(peer, ConnectionId::from(1usize)).unwrap(); + + // verify that the peer state is `Disconnected` + { + let peers = manager.peers.read(); + let peer = peers.get(&peer).unwrap(); + + match &peer.state { + PeerState::Disconnected { + dial_record: Some(dial_record), + .. + } => { + assert_eq!(dial_record.address, dial_address); + } + state => panic!("invalid state: {state:?}"), + } + } + + // dialing the peer failed + manager.on_dial_failure(ConnectionId::from(0usize)).unwrap(); + + let peers = manager.peers.read(); + let peer = peers.get(&peer).unwrap(); + + match &peer.state { + PeerState::Disconnected { + dial_record: None, .. + } => { + assert!(peer.addresses.addresses.contains_key(&dial_address)); + } + state => panic!("invalid state: {state:?}"), + } + } + + // local node tried to dial a node and it failed but in the mean + // time the remote node dialed local node and that succeeded. + // + // while the dial was still in progresss, the remote node disconnected after which + // the dial failure was reported. + #[tokio::test] + async fn on_dial_success_while_connected_and_disconnected() { + let _ = tracing_subscriber::fmt() + .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) + .try_init(); + + let mut manager = TransportManagerBuilder::new().build(); + let _handle = manager.transport_handle(Arc::new(DefaultExecutor {})); + manager.register_transport(SupportedTransport::Tcp, Box::new(DummyTransport::new())); + + let peer = PeerId::random(); + let dial_address = Multiaddr::empty() + .with(Protocol::Ip4(Ipv4Addr::new(127, 0, 0, 1))) + .with(Protocol::Tcp(8888)) + .with(Protocol::P2p( + Multihash::from_bytes(&peer.to_bytes()).unwrap(), + )); + let connect_address = Multiaddr::empty() + .with(Protocol::Ip4(Ipv4Addr::new(192, 168, 1, 173))) + .with(Protocol::Tcp(8888)) + .with(Protocol::P2p( + Multihash::from_bytes(&peer.to_bytes()).unwrap(), + )); + assert!(manager.dial_address(dial_address.clone()).await.is_ok()); + assert_eq!(manager.pending_connections.len(), 1); + + match &manager.peers.read().get(&peer).unwrap().state { + PeerState::Dialing { dial_record } => { + assert_eq!(dial_record.address, dial_address); + } + state => panic!("invalid state for peer: {state:?}"), + } + + // remote peer connected to local node from a different address that was dialed + manager + .on_connection_established( + peer, + &Endpoint::listener(connect_address, ConnectionId::from(1usize)), + ) + .unwrap(); + + // connection to remote was closed while the dial was still in progress + manager.on_connection_closed(peer, ConnectionId::from(1usize)).unwrap(); + + // verify that the peer state is `Disconnected` + { + let peers = manager.peers.read(); + let peer = peers.get(&peer).unwrap(); + + match &peer.state { + PeerState::Disconnected { + dial_record: Some(dial_record), + .. + } => { + assert_eq!(dial_record.address, dial_address); + } + state => panic!("invalid state: {state:?}"), + } + } + + // the original dial succeeded + manager + .on_connection_established( + peer, + &Endpoint::dialer(dial_address, ConnectionId::from(0usize)), + ) + .unwrap(); + + let peers = manager.peers.read(); + let peer = peers.get(&peer).unwrap(); + + match &peer.state { + PeerState::Connected { + secondary: None, .. + } => {} + state => panic!("invalid state: {state:?}"), + } + } + + #[tokio::test] + async fn secondary_connection_is_tracked() { + let _ = tracing_subscriber::fmt() + .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) + .try_init(); + + let mut manager = TransportManagerBuilder::new().build(); + manager.register_transport(SupportedTransport::Tcp, Box::new(DummyTransport::new())); + + let peer = PeerId::random(); + let address1 = Multiaddr::empty() + .with(Protocol::Ip4(Ipv4Addr::new(127, 0, 0, 1))) + .with(Protocol::Tcp(8888)) + .with(Protocol::P2p( + Multihash::from_bytes(&peer.to_bytes()).unwrap(), + )); + let address2 = Multiaddr::empty() + .with(Protocol::Ip4(Ipv4Addr::new(192, 168, 1, 173))) + .with(Protocol::Tcp(8888)) + .with(Protocol::P2p( + Multihash::from_bytes(&peer.to_bytes()).unwrap(), + )); + let address3 = Multiaddr::empty() + .with(Protocol::Ip4(Ipv4Addr::new(192, 168, 10, 64))) + .with(Protocol::Tcp(9999)) + .with(Protocol::P2p( + Multihash::from_bytes(&peer.to_bytes()).unwrap(), + )); + + // remote peer connected to local node + let established_result = manager + .on_connection_established( + peer, + &Endpoint::dialer(address1.clone(), ConnectionId::from(0usize)), + ) + .unwrap(); + assert_eq!(established_result, ConnectionEstablishedResult::Accept); + + // verify that the peer state is `Connected` with no secondary connection + { + let peers = manager.peers.read(); + let peer = peers.get(&peer).unwrap(); + + match &peer.state { + PeerState::Connected { + secondary: None, .. + } => {} + state => panic!("invalid state: {state:?}"), + } + } + + // second connection is established, verify that the secondary connection is tracked + let established_result = manager + .on_connection_established( + peer, + &Endpoint::listener(address2.clone(), ConnectionId::from(1usize)), + ) + .unwrap(); + assert_eq!(established_result, ConnectionEstablishedResult::Accept); + + let peers = manager.peers.read(); + let context = peers.get(&peer).unwrap(); + + match &context.state { + PeerState::Connected { + secondary: Some(SecondaryOrDialing::Secondary(secondary_connection)), + .. + } => { + assert_eq!(secondary_connection.address, address2); + } + state => panic!("invalid state: {state:?}"), + } + drop(peers); + + // tertiary connection is ignored + let established_result = manager + .on_connection_established( + peer, + &Endpoint::listener(address3.clone(), ConnectionId::from(2usize)), + ) + .unwrap(); + assert_eq!(established_result, ConnectionEstablishedResult::Reject); + + let peers = manager.peers.read(); + let peer = peers.get(&peer).unwrap(); + + match &peer.state { + PeerState::Connected { + secondary: Some(SecondaryOrDialing::Secondary(secondary_connection)), + .. + } => { + assert_eq!(secondary_connection.address, address2); + // Endpoint::listener addresses are not tracked. + assert!(!peer.addresses.addresses.contains_key(&address2)); + assert!(!peer.addresses.addresses.contains_key(&address3)); + assert_eq!( + peer.addresses.addresses.get(&address1).unwrap().score(), + scores::CONNECTION_ESTABLISHED + ); + } + state => panic!("invalid state: {state:?}"), + } + } + #[tokio::test] + async fn secondary_connection_with_different_dial_endpoint_is_rejected() { + let _ = tracing_subscriber::fmt() + .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) + .try_init(); + + let mut manager = TransportManagerBuilder::new().build(); + manager.register_transport(SupportedTransport::Tcp, Box::new(DummyTransport::new())); + + let peer = PeerId::random(); + let address1 = Multiaddr::empty() + .with(Protocol::Ip4(Ipv4Addr::new(127, 0, 0, 1))) + .with(Protocol::Tcp(8888)) + .with(Protocol::P2p( + Multihash::from_bytes(&peer.to_bytes()).unwrap(), + )); + let address2 = Multiaddr::empty() + .with(Protocol::Ip4(Ipv4Addr::new(192, 168, 1, 173))) + .with(Protocol::Tcp(8888)) + .with(Protocol::P2p( + Multihash::from_bytes(&peer.to_bytes()).unwrap(), + )); + + // remote peer connected to local node + let established_result = manager + .on_connection_established( + peer, + &Endpoint::listener(address1, ConnectionId::from(0usize)), + ) + .unwrap(); + assert_eq!(established_result, ConnectionEstablishedResult::Accept); + + // verify that the peer state is `Connected` with no secondary connection + { + let peers = manager.peers.read(); + let peer = peers.get(&peer).unwrap(); + + match &peer.state { + PeerState::Connected { + secondary: None, .. + } => {} + state => panic!("invalid state: {state:?}"), + } + } + + // Add a dial record for the peer. + { + let mut peers = manager.peers.write(); + let peer_context = peers.get_mut(&peer).unwrap(); + + let record = match &peer_context.state { + PeerState::Connected { record, .. } => record.clone(), + state => panic!("invalid state: {state:?}"), + }; + + let dial_record = ConnectionRecord::new(peer, address2.clone(), ConnectionId::from(0)); + peer_context.state = PeerState::Connected { + record, + secondary: Some(SecondaryOrDialing::Dialing(dial_record)), + }; + } + + // second connection is from a different endpoint should fail. + let established_result = manager + .on_connection_established( + peer, + &Endpoint::listener(address2.clone(), ConnectionId::from(1usize)), + ) + .unwrap(); + assert_eq!(established_result, ConnectionEstablishedResult::Reject); + + // Multiple secondary connections should also fail. + let established_result = manager + .on_connection_established( + peer, + &Endpoint::listener(address2.clone(), ConnectionId::from(1usize)), + ) + .unwrap(); + assert_eq!(established_result, ConnectionEstablishedResult::Reject); + + // Accept the proper connection ID. + let established_result = manager + .on_connection_established( + peer, + &Endpoint::listener(address2.clone(), ConnectionId::from(0usize)), + ) + .unwrap(); + assert_eq!(established_result, ConnectionEstablishedResult::Accept); + } + + #[tokio::test] + async fn secondary_connection_closed() { + let _ = tracing_subscriber::fmt() + .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) + .try_init(); + + let mut manager = TransportManagerBuilder::new().build(); + manager.register_transport(SupportedTransport::Tcp, Box::new(DummyTransport::new())); + + let peer = PeerId::random(); + let address1 = Multiaddr::empty() + .with(Protocol::Ip4(Ipv4Addr::new(127, 0, 0, 1))) + .with(Protocol::Tcp(8888)) + .with(Protocol::P2p( + Multihash::from_bytes(&peer.to_bytes()).unwrap(), + )); + let address2 = Multiaddr::empty() + .with(Protocol::Ip4(Ipv4Addr::new(192, 168, 1, 173))) + .with(Protocol::Tcp(8888)) + .with(Protocol::P2p( + Multihash::from_bytes(&peer.to_bytes()).unwrap(), + )); + + // remote peer connected to local node + let emit_event = manager + .on_connection_established( + peer, + &Endpoint::listener(address1, ConnectionId::from(0usize)), + ) + .unwrap(); + assert!(std::matches!( + emit_event, + ConnectionEstablishedResult::Accept + )); + + // verify that the peer state is `Connected` with no seconary connection + { + let peers = manager.peers.read(); + let peer = peers.get(&peer).unwrap(); + + match &peer.state { + PeerState::Connected { + record, + secondary: None, + .. + } => { + // Primary connection is established. + assert_eq!(record.connection_id, ConnectionId::from(0usize)); + } + state => panic!("invalid state: {state:?}"), + } + } + + // second connection is established, verify that the secondary connection is tracked + let emit_event = manager + .on_connection_established( + peer, + &Endpoint::dialer(address2.clone(), ConnectionId::from(1usize)), + ) + .unwrap(); + assert!(std::matches!( + emit_event, + ConnectionEstablishedResult::Accept + )); + + let peers = manager.peers.read(); + let context = peers.get(&peer).unwrap(); + + match &context.state { + PeerState::Connected { + secondary: Some(SecondaryOrDialing::Secondary(secondary_connection)), + .. + } => { + assert_eq!(secondary_connection.address, address2); + } + state => panic!("invalid state: {state:?}"), + } + drop(peers); + + // close the secondary connection and verify that the peer remains connected + let emit_event = manager.on_connection_closed(peer, ConnectionId::from(1usize)); + assert!(emit_event.is_none()); + + let peers = manager.peers.read(); + let context = peers.get(&peer).unwrap(); + + match &context.state { + PeerState::Connected { + secondary: None, + record, + } => { + assert!(context.addresses.addresses.contains_key(&address2)); + assert_eq!( + context.addresses.addresses.get(&address2).unwrap().score(), + scores::CONNECTION_ESTABLISHED + ); + // Primary remains opened. + assert_eq!(record.connection_id, ConnectionId::from(0usize)); + } + state => panic!("invalid state: {state:?}"), + } + } + + #[tokio::test] + async fn switch_to_secondary_connection() { + let _ = tracing_subscriber::fmt() + .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) + .try_init(); + + let mut manager = TransportManagerBuilder::new().build(); + manager.register_transport(SupportedTransport::Tcp, Box::new(DummyTransport::new())); + + let peer = PeerId::random(); + let address1 = Multiaddr::empty() + .with(Protocol::Ip4(Ipv4Addr::new(127, 0, 0, 1))) + .with(Protocol::Tcp(8888)) + .with(Protocol::P2p( + Multihash::from_bytes(&peer.to_bytes()).unwrap(), + )); + let address2 = Multiaddr::empty() + .with(Protocol::Ip4(Ipv4Addr::new(192, 168, 1, 173))) + .with(Protocol::Tcp(8888)) + .with(Protocol::P2p( + Multihash::from_bytes(&peer.to_bytes()).unwrap(), + )); + + // remote peer connected to local node + let emit_event = manager + .on_connection_established( + peer, + &Endpoint::listener(address1.clone(), ConnectionId::from(0usize)), + ) + .unwrap(); + assert!(std::matches!( + emit_event, + ConnectionEstablishedResult::Accept + )); + + // verify that the peer state is `Connected` with no secondary connection + { + let peers = manager.peers.read(); + let peer = peers.get(&peer).unwrap(); + + match &peer.state { + PeerState::Connected { + secondary: None, .. + } => {} + state => panic!("invalid state: {state:?}"), + } + } + + // second connection is established, verify that the secondary connection is tracked + let emit_event = manager + .on_connection_established( + peer, + &Endpoint::dialer(address2.clone(), ConnectionId::from(1usize)), + ) + .unwrap(); + assert!(std::matches!( + emit_event, + ConnectionEstablishedResult::Accept + )); + + let peers = manager.peers.read(); + let context = peers.get(&peer).unwrap(); + + match &context.state { + PeerState::Connected { + secondary: Some(SecondaryOrDialing::Secondary(secondary_connection)), + .. + } => { + assert_eq!(secondary_connection.address, address2); + } + state => panic!("invalid state: {state:?}"), + } + drop(peers); + + // close the primary connection and verify that the peer remains connected + // while the primary connection address is stored in peer addresses + let emit_event = manager.on_connection_closed(peer, ConnectionId::from(0usize)); + assert!(emit_event.is_none()); + + let peers = manager.peers.read(); + let context = peers.get(&peer).unwrap(); + + match &context.state { + PeerState::Connected { + secondary: None, + record, + } => { + assert!(!context.addresses.addresses.contains_key(&address1)); + assert!(context.addresses.addresses.contains_key(&address2)); + assert_eq!(record.connection_id, ConnectionId::from(1usize)); + } + state => panic!("invalid state: {state:?}"), + } + } + + // two connections already exist and a third was opened which is ignored by + // `on_connection_established()`, when that connection is closed, verify that + // it's handled gracefully + #[tokio::test] + async fn tertiary_connection_closed() { + let _ = tracing_subscriber::fmt() + .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) + .try_init(); + + let mut manager = TransportManagerBuilder::new().build(); + manager.register_transport(SupportedTransport::Tcp, Box::new(DummyTransport::new())); + + let peer = PeerId::random(); + let address1 = Multiaddr::empty() + .with(Protocol::Ip4(Ipv4Addr::new(127, 0, 0, 1))) + .with(Protocol::Tcp(8888)) + .with(Protocol::P2p( + Multihash::from_bytes(&peer.to_bytes()).unwrap(), + )); + let address2 = Multiaddr::empty() + .with(Protocol::Ip4(Ipv4Addr::new(192, 168, 1, 173))) + .with(Protocol::Tcp(8888)) + .with(Protocol::P2p( + Multihash::from_bytes(&peer.to_bytes()).unwrap(), + )); + let address3 = Multiaddr::empty() + .with(Protocol::Ip4(Ipv4Addr::new(192, 168, 1, 173))) + .with(Protocol::Tcp(9999)) + .with(Protocol::P2p( + Multihash::from_bytes(&peer.to_bytes()).unwrap(), + )); + + // remote peer connected to local node + let emit_event = manager + .on_connection_established( + peer, + &Endpoint::listener(address1.clone(), ConnectionId::from(0usize)), + ) + .unwrap(); + assert!(std::matches!( + emit_event, + ConnectionEstablishedResult::Accept + )); + + // The address1 should be ignored because it is an inbound connection + // initiated from an ephemeral port. + let peers = manager.peers.read(); + let context = peers.get(&peer).unwrap(); + assert!(!context.addresses.addresses.contains_key(&address1)); + drop(peers); + + // verify that the peer state is `Connected` with no seconary connection + { + let peers = manager.peers.read(); + let peer = peers.get(&peer).unwrap(); + + match &peer.state { + PeerState::Connected { + secondary: None, .. + } => {} + state => panic!("invalid state: {state:?}"), + } + } + + // second connection is established, verify that the seconary connection is tracked + let emit_event = manager + .on_connection_established( + peer, + &Endpoint::dialer(address2.clone(), ConnectionId::from(1usize)), + ) + .unwrap(); + assert!(std::matches!( + emit_event, + ConnectionEstablishedResult::Accept + )); + + // Ensure we keep track of this address. + let peers = manager.peers.read(); + let context = peers.get(&peer).unwrap(); + assert!(context.addresses.addresses.contains_key(&address2)); + drop(peers); + + let peers = manager.peers.read(); + let context = peers.get(&peer).unwrap(); + + match &context.state { + PeerState::Connected { + secondary: Some(SecondaryOrDialing::Secondary(secondary_connection)), + .. + } => { + assert_eq!(secondary_connection.address, address2); + } + state => panic!("invalid state: {state:?}"), + } + drop(peers); + + // third connection is established, verify that it's discarded + let emit_event = manager + .on_connection_established( + peer, + &Endpoint::listener(address3.clone(), ConnectionId::from(2usize)), + ) + .unwrap(); + assert!(std::matches!( + emit_event, + ConnectionEstablishedResult::Reject + )); + + let peers = manager.peers.read(); + let context = peers.get(&peer).unwrap(); + // The tertiary connection should be ignored because it is an inbound connection + // initiated from an ephemeral port. + assert!(!context.addresses.addresses.contains_key(&address3)); + drop(peers); + + // close the tertiary connection that was ignored + let emit_event = manager.on_connection_closed(peer, ConnectionId::from(2usize)); + assert!(emit_event.is_none()); + + // verify that the state remains unchanged + let peers = manager.peers.read(); + let context = peers.get(&peer).unwrap(); + + match &context.state { + PeerState::Connected { + secondary: Some(SecondaryOrDialing::Secondary(secondary_connection)), + .. + } => { + assert_eq!(secondary_connection.address, address2); + assert_eq!( + context.addresses.addresses.get(&address2).unwrap().score(), + scores::CONNECTION_ESTABLISHED + ); + } + state => panic!("invalid state: {state:?}"), + } + + drop(peers); + } + #[tokio::test] + #[cfg(debug_assertions)] + #[should_panic] + async fn dial_failure_for_unknow_connection() { + let _ = tracing_subscriber::fmt() + .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) + .try_init(); + + let mut manager = TransportManagerBuilder::new().build(); + + manager.on_dial_failure(ConnectionId::random()).unwrap(); + } + + #[tokio::test] + #[cfg(debug_assertions)] + #[should_panic] + async fn connection_closed_for_unknown_peer() { + let _ = tracing_subscriber::fmt() + .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) + .try_init(); + + let mut manager = TransportManagerBuilder::new().build(); + manager.on_connection_closed(PeerId::random(), ConnectionId::random()).unwrap(); + } + + #[tokio::test] + #[cfg(debug_assertions)] + #[should_panic] + async fn unknown_connection_opened() { + let _ = tracing_subscriber::fmt() + .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) + .try_init(); + + let mut manager = TransportManagerBuilder::new().build(); + manager + .on_connection_opened( + SupportedTransport::Tcp, + ConnectionId::random(), + Multiaddr::empty(), + ) + .unwrap(); + } + + #[tokio::test] + #[cfg(debug_assertions)] + #[should_panic] + async fn connection_opened_for_unknown_peer() { + let _ = tracing_subscriber::fmt() + .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) + .try_init(); + + let mut manager = TransportManagerBuilder::new().build(); + let connection_id = ConnectionId::random(); + let peer = PeerId::random(); + + manager.pending_connections.insert(connection_id, peer); + manager + .on_connection_opened(SupportedTransport::Tcp, connection_id, Multiaddr::empty()) + .unwrap(); + } + + #[tokio::test] + #[cfg(debug_assertions)] + #[should_panic] + async fn connection_established_for_wrong_peer() { + let _ = tracing_subscriber::fmt() + .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) + .try_init(); + + let mut manager = TransportManagerBuilder::new().build(); + let connection_id = ConnectionId::random(); + let peer = PeerId::random(); + + manager.pending_connections.insert(connection_id, peer); + manager + .on_connection_established( + PeerId::random(), + &Endpoint::dialer(Multiaddr::empty(), connection_id), + ) + .unwrap(); + } + + #[tokio::test] + #[cfg(debug_assertions)] + #[should_panic] + async fn open_failure_unknown_connection() { + let _ = tracing_subscriber::fmt() + .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) + .try_init(); + + let mut manager = TransportManagerBuilder::new().build(); + + manager + .on_open_failure(SupportedTransport::Tcp, ConnectionId::random()) + .unwrap(); + } + + #[tokio::test] + #[cfg(debug_assertions)] + #[should_panic] + async fn open_failure_unknown_peer() { + let _ = tracing_subscriber::fmt() + .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) + .try_init(); + + let mut manager = TransportManagerBuilder::new().build(); + let connection_id = ConnectionId::random(); + let peer = PeerId::random(); + + manager.pending_connections.insert(connection_id, peer); + manager.on_open_failure(SupportedTransport::Tcp, connection_id).unwrap(); + } + + #[tokio::test] + async fn no_transports() { + let _ = tracing_subscriber::fmt() + .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) + .try_init(); + + let mut manager = TransportManagerBuilder::new().build(); + + assert!(manager.next().await.is_none()); + } + + #[tokio::test] + async fn dial_already_connected_peer() { + let mut manager = TransportManagerBuilder::new().build(); + + let peer = { + let peer = PeerId::random(); + let mut peers = manager.peers.write(); + + peers.insert( + peer, + PeerContext { + state: PeerState::Connected { + record: ConnectionRecord { + address: Multiaddr::empty() + .with(Protocol::Ip4(std::net::Ipv4Addr::new(127, 0, 0, 1))) + .with(Protocol::Tcp(8888)) + .with(Protocol::P2p(Multihash::from(peer))), + connection_id: ConnectionId::from(0usize), + }, + secondary: None, + }, + + addresses: AddressStore::from_iter( + vec![Multiaddr::empty() + .with(Protocol::Ip4(std::net::Ipv4Addr::new(127, 0, 0, 1))) + .with(Protocol::Tcp(8888)) + .with(Protocol::P2p(Multihash::from(peer)))] + .into_iter(), + ), + }, + ); + drop(peers); + + peer + }; + + match manager.dial(peer).await { + Err(Error::AlreadyConnected) => {} + _ => panic!("invalid return value"), + } + } + + #[tokio::test] + async fn peer_already_being_dialed() { + let mut manager = TransportManagerBuilder::new().build(); + + let peer = { + let peer = PeerId::random(); + let mut peers = manager.peers.write(); + + peers.insert( + peer, + PeerContext { + state: PeerState::Dialing { + dial_record: ConnectionRecord { + address: Multiaddr::empty() + .with(Protocol::Ip4(std::net::Ipv4Addr::new(127, 0, 0, 1))) + .with(Protocol::Tcp(8888)) + .with(Protocol::P2p(Multihash::from(peer))), + connection_id: ConnectionId::from(0usize), + }, + }, + + addresses: AddressStore::from_iter( + vec![Multiaddr::empty() + .with(Protocol::Ip4(std::net::Ipv4Addr::new(127, 0, 0, 1))) + .with(Protocol::Tcp(8888)) + .with(Protocol::P2p(Multihash::from(peer)))] + .into_iter(), + ), + }, + ); + drop(peers); + + peer + }; + + manager.dial(peer).await.unwrap(); + + // Check state is unaltered. + { + let peers = manager.peers.read(); + let peer_context = peers.get(&peer).unwrap(); + + match &peer_context.state { + PeerState::Dialing { dial_record } => { + assert_eq!( + dial_record.address, + Multiaddr::empty() + .with(Protocol::Ip4(std::net::Ipv4Addr::new(127, 0, 0, 1))) + .with(Protocol::Tcp(8888)) + .with(Protocol::P2p(Multihash::from(peer))) + ); + } + state => panic!("invalid state: {state:?}"), + } + } + } + + #[tokio::test] + async fn pending_connection_for_disconnected_peer() { + let mut manager = TransportManagerBuilder::new().build(); + + let peer = { + let peer = PeerId::random(); + let mut peers = manager.peers.write(); + + peers.insert( + peer, + PeerContext { + state: PeerState::Disconnected { + dial_record: Some(ConnectionRecord::new( + peer, + Multiaddr::empty() + .with(Protocol::Ip4(std::net::Ipv4Addr::new(127, 0, 0, 1))) + .with(Protocol::Tcp(8888)) + .with(Protocol::P2p(Multihash::from(peer))), + ConnectionId::from(0), + )), + }, + + addresses: AddressStore::new(), + }, + ); + drop(peers); + + peer + }; + + manager.dial(peer).await.unwrap(); + } + + #[tokio::test] + async fn dial_address_invalid_transport() { + let _ = tracing_subscriber::fmt() + .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) + .try_init(); + + let mut manager = TransportManagerBuilder::new().build(); + + // transport doesn't start with ip/dns + { + let address = Multiaddr::empty().with(Protocol::P2p(Multihash::from(PeerId::random()))); + match manager.dial_address(address.clone()).await { + Err(Error::TransportNotSupported(dial_address)) => { + assert_eq!(dial_address, address); + } + _ => panic!("invalid return value"), + } + } + + { + // upd-based protocol but not quic + let address = Multiaddr::empty() + .with(Protocol::Ip4(std::net::Ipv4Addr::new(127, 0, 0, 1))) + .with(Protocol::Udp(8888)) + .with(Protocol::Utp) + .with(Protocol::P2p(Multihash::from(PeerId::random()))); + match manager.dial_address(address.clone()).await { + Err(Error::TransportNotSupported(dial_address)) => { + assert_eq!(dial_address, address); + } + res => panic!("invalid return value: {res:?}"), + } + } + + // not tcp nor udp + { + let address = Multiaddr::empty() + .with(Protocol::Ip4(std::net::Ipv4Addr::new(127, 0, 0, 1))) + .with(Protocol::Sctp(8888)) + .with(Protocol::P2p(Multihash::from(PeerId::random()))); + match manager.dial_address(address.clone()).await { + Err(Error::TransportNotSupported(dial_address)) => { + assert_eq!(dial_address, address); + } + _ => panic!("invalid return value"), + } + } + + // random protocol after tcp + { + let address = Multiaddr::empty() + .with(Protocol::Ip4(std::net::Ipv4Addr::new(127, 0, 0, 1))) + .with(Protocol::Tcp(8888)) + .with(Protocol::Utp) + .with(Protocol::P2p(Multihash::from(PeerId::random()))); + match manager.dial_address(address.clone()).await { + Err(Error::TransportNotSupported(dial_address)) => { + assert_eq!(dial_address, address); + } + _ => panic!("invalid return value"), + } + } + } + + #[tokio::test] + async fn dial_address_peer_id_missing() { + let mut manager = TransportManagerBuilder::new().build(); + + async fn call_manager(manager: &mut TransportManager, address: Multiaddr) { + match manager.dial_address(address).await { + Err(Error::AddressError(AddressError::PeerIdMissing)) => {} + _ => panic!("invalid return value"), + } + } + + { + call_manager( + &mut manager, + Multiaddr::empty() + .with(Protocol::Ip4(std::net::Ipv4Addr::new(127, 0, 0, 1))) + .with(Protocol::Tcp(8888)), + ) + .await; + } + + { + call_manager( + &mut manager, + Multiaddr::empty() + .with(Protocol::Ip4(std::net::Ipv4Addr::new(127, 0, 0, 1))) + .with(Protocol::Tcp(8888)) + .with(Protocol::Wss(std::borrow::Cow::Owned("".to_string()))), + ) + .await; + } + + { + call_manager( + &mut manager, + Multiaddr::empty() + .with(Protocol::Ip4(std::net::Ipv4Addr::new(127, 0, 0, 1))) + .with(Protocol::Udp(8888)) + .with(Protocol::QuicV1), + ) + .await; + } + } + + #[tokio::test] + async fn inbound_connection_while_dialing() { + let _ = tracing_subscriber::fmt() + .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) + .try_init(); + + let mut manager = TransportManagerBuilder::new().build(); + let peer = PeerId::random(); + let dial_address = Multiaddr::empty() + .with(Protocol::Ip4(Ipv4Addr::new(127, 0, 0, 1))) + .with(Protocol::Tcp(8888)) + .with(Protocol::P2p( + Multihash::from_bytes(&peer.to_bytes()).unwrap(), + )); + + let connection_id = ConnectionId::random(); + let transport = Box::new({ + let mut transport = DummyTransport::new(); + transport.inject_event(TransportEvent::ConnectionEstablished { + peer, + endpoint: Endpoint::listener(dial_address.clone(), connection_id), + }); + transport + }); + manager.register_transport(SupportedTransport::Tcp, transport); + manager.add_known_address( + peer, + vec![Multiaddr::empty() + .with(Protocol::Ip4(Ipv4Addr::new(192, 168, 1, 5))) + .with(Protocol::Tcp(8888)) + .with(Protocol::P2p(Multihash::from(peer)))] + .into_iter(), + ); + + assert!(manager.dial(peer).await.is_ok()); + assert!(!manager.pending_connections.is_empty()); + + { + let peers = manager.peers.read(); + + match peers.get(&peer) { + Some(PeerContext { + state: PeerState::Opening { .. }, + .. + }) => {} + state => panic!("invalid state for peer: {state:?}"), + } + } + + match manager.next().await.unwrap() { + TransportEvent::ConnectionEstablished { + peer: event_peer, + endpoint: event_endpoint, + .. + } => { + assert_eq!(peer, event_peer); + assert_eq!( + event_endpoint, + Endpoint::listener(dial_address.clone(), connection_id), + ); + } + event => panic!("invalid event: {event:?}"), + } + assert!(manager.pending_connections.is_empty()); + + let peers = manager.peers.read(); + match peers.get(&peer).unwrap() { + PeerContext { + state: PeerState::Connected { record, secondary }, + addresses, + } => { + assert!(!addresses.addresses.contains_key(&record.address)); + assert!(secondary.is_none()); + assert_eq!(record.address, dial_address); + assert_eq!(record.connection_id, connection_id); + } + state => panic!("invalid peer state: {state:?}"), + } + } + + #[tokio::test] + async fn inbound_connection_for_same_address_while_dialing() { + let _ = tracing_subscriber::fmt() + .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) + .try_init(); + + let mut manager = TransportManagerBuilder::new().build(); + let peer = PeerId::random(); + let dial_address = Multiaddr::empty() + .with(Protocol::Ip4(Ipv4Addr::new(127, 0, 0, 1))) + .with(Protocol::Tcp(8888)) + .with(Protocol::P2p( + Multihash::from_bytes(&peer.to_bytes()).unwrap(), + )); + + let connection_id = ConnectionId::random(); + let transport = Box::new({ + let mut transport = DummyTransport::new(); + transport.inject_event(TransportEvent::ConnectionEstablished { + peer, + endpoint: Endpoint::listener(dial_address.clone(), connection_id), + }); + transport + }); + manager.register_transport(SupportedTransport::Tcp, transport); + manager.add_known_address( + peer, + vec![Multiaddr::empty() + .with(Protocol::Ip4(Ipv4Addr::new(127, 0, 0, 1))) + .with(Protocol::Tcp(8888)) + .with(Protocol::P2p(Multihash::from(peer)))] + .into_iter(), + ); + + assert!(manager.dial(peer).await.is_ok()); + assert!(!manager.pending_connections.is_empty()); + + { + let peers = manager.peers.read(); + + match peers.get(&peer) { + Some(PeerContext { + state: PeerState::Opening { .. }, + .. + }) => {} + state => panic!("invalid state for peer: {state:?}"), + } + } + + match manager.next().await.unwrap() { + TransportEvent::ConnectionEstablished { + peer: event_peer, + endpoint: event_endpoint, + .. + } => { + assert_eq!(peer, event_peer); + assert_eq!( + event_endpoint, + Endpoint::listener(dial_address.clone(), connection_id), + ); + } + event => panic!("invalid event: {event:?}"), + } + assert!(manager.pending_connections.is_empty()); + + let peers = manager.peers.read(); + match peers.get(&peer).unwrap() { + PeerContext { + state: PeerState::Connected { record, secondary }, + addresses, + } => { + // Saved from the dial attempt. + assert_eq!(addresses.addresses.get(&dial_address).unwrap().score(), 0); + + assert!(secondary.is_none()); + assert_eq!(record.address, dial_address); + assert_eq!(record.connection_id, connection_id); + } + state => panic!("invalid peer state: {state:?}"), + } + } + + #[tokio::test] + async fn manager_limits_incoming_connections() { + let _ = tracing_subscriber::fmt() + .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) + .try_init(); + + let mut manager = TransportManagerBuilder::new() + .with_connection_limits_config( + ConnectionLimitsConfig::default() + .max_incoming_connections(Some(3)) + .max_outgoing_connections(Some(2)), + ) + .build(); + // The connection limit is agnostic of the underlying transports. + manager.register_transport(SupportedTransport::Tcp, Box::new(DummyTransport::new())); + + let peer = PeerId::random(); + let second_peer = PeerId::random(); + + // Setup addresses. + let (first_addr, first_connection_id) = setup_dial_addr(peer, 0); + let (second_addr, second_connection_id) = setup_dial_addr(second_peer, 1); + let (_, third_connection_id) = setup_dial_addr(peer, 2); + let (_, remote_connection_id) = setup_dial_addr(peer, 3); + + // Peer established the first inbound connection. + let result = manager + .on_connection_established( + peer, + &Endpoint::listener(first_addr.clone(), first_connection_id), + ) + .unwrap(); + assert_eq!(result, ConnectionEstablishedResult::Accept); + + // The peer is allowed to dial us a second time. + let result = manager + .on_connection_established( + peer, + &Endpoint::listener(first_addr.clone(), second_connection_id), + ) + .unwrap(); + assert_eq!(result, ConnectionEstablishedResult::Accept); + + // Second peer calls us. + let result = manager + .on_connection_established( + second_peer, + &Endpoint::listener(second_addr.clone(), third_connection_id), + ) + .unwrap(); + assert_eq!(result, ConnectionEstablishedResult::Accept); + + // Limits of inbound connections are reached. + let result = manager + .on_connection_established( + second_peer, + &Endpoint::listener(second_addr.clone(), remote_connection_id), + ) + .unwrap(); + assert_eq!(result, ConnectionEstablishedResult::Reject); + + // Close one connection. + assert!(manager.on_connection_closed(peer, first_connection_id).is_none()); + + // The second peer can establish 2 inbounds now. + let result = manager + .on_connection_established( + second_peer, + &Endpoint::listener(second_addr.clone(), remote_connection_id), + ) + .unwrap(); + assert_eq!(result, ConnectionEstablishedResult::Accept); + } + + #[tokio::test] + async fn manager_limits_outbound_connections() { + let _ = tracing_subscriber::fmt() + .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) + .try_init(); + + let mut manager = TransportManagerBuilder::new() + .with_connection_limits_config( + ConnectionLimitsConfig::default() + .max_incoming_connections(Some(3)) + .max_outgoing_connections(Some(2)), + ) + .build(); + // The connection limit is agnostic of the underlying transports. + manager.register_transport(SupportedTransport::Tcp, Box::new(DummyTransport::new())); + + let peer = PeerId::random(); + let second_peer = PeerId::random(); + let third_peer = PeerId::random(); + + // Setup addresses. + let (first_addr, first_connection_id) = setup_dial_addr(peer, 0); + let (second_addr, second_connection_id) = setup_dial_addr(second_peer, 1); + let (third_addr, third_connection_id) = setup_dial_addr(third_peer, 2); + + // First dial. + manager.dial_address(first_addr.clone()).await.unwrap(); + + // Second dial. + manager.dial_address(second_addr.clone()).await.unwrap(); + + // Third dial, we have a limit on 2 outbound connections. + manager.dial_address(third_addr.clone()).await.unwrap(); + + let result = manager + .on_connection_established( + peer, + &Endpoint::dialer(first_addr.clone(), first_connection_id), + ) + .unwrap(); + + assert_eq!(result, ConnectionEstablishedResult::Accept); + + let result = manager + .on_connection_established( + second_peer, + &Endpoint::dialer(second_addr.clone(), second_connection_id), + ) + .unwrap(); + assert_eq!(result, ConnectionEstablishedResult::Accept); + + // We have reached the limit now. + let result = manager + .on_connection_established( + third_peer, + &Endpoint::dialer(third_addr.clone(), third_connection_id), + ) + .unwrap(); + assert_eq!(result, ConnectionEstablishedResult::Reject); + + // While we have 2 outbound connections active, any dials will fail immediately. + // We cannot perform this check for the non negotiated inbound connections yet, + // since the transport will eagerly accept and negotiate them. This requires + // a refactor into the transport manager, to not waste resources on + // negotiating connections that will be rejected. + let result = manager.dial(peer).await.unwrap_err(); + assert!(std::matches!( + result, + Error::ConnectionLimit(limits::ConnectionLimitsError::MaxOutgoingConnectionsExceeded) + )); + let result = manager.dial_address(first_addr.clone()).await.unwrap_err(); + assert!(std::matches!( + result, + Error::ConnectionLimit(limits::ConnectionLimitsError::MaxOutgoingConnectionsExceeded) + )); + + // Close one connection. + assert!(manager.on_connection_closed(peer, first_connection_id).is_some()); + // We can now dial again. + manager.dial_address(first_addr.clone()).await.unwrap(); + + let result = manager + .on_connection_established(peer, &Endpoint::dialer(first_addr, first_connection_id)) + .unwrap(); + assert_eq!(result, ConnectionEstablishedResult::Accept); + } + + #[tokio::test] + async fn reject_unknown_secondary_connections_with_different_connection_ids() { + let _ = tracing_subscriber::fmt() + .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) + .try_init(); + + let mut manager = TransportManagerBuilder::new().build(); + manager.register_transport(SupportedTransport::Tcp, Box::new(DummyTransport::new())); + + // Random peer ID. + let peer = PeerId::random(); + let (first_addr, _first_connection_id) = setup_dial_addr(peer, 0); + let second_connection_id = ConnectionId::from(1); + let different_connection_id = ConnectionId::from(2); + + // Setup a connected peer with a dial record active. + { + let mut peers = manager.peers.write(); + + let state = PeerState::Connected { + record: ConnectionRecord::new(peer, first_addr.clone(), ConnectionId::from(0)), + secondary: Some(SecondaryOrDialing::Dialing(ConnectionRecord::new( + peer, + first_addr.clone(), + second_connection_id, + ))), + }; + + let peer_context = PeerContext { + state, + addresses: AddressStore::from_iter(vec![first_addr.clone()].into_iter()), + }; + + peers.insert(peer, peer_context); + } + + // Establish a connection, however the connection ID is different. + let result = manager + .on_connection_established( + peer, + &Endpoint::dialer(first_addr.clone(), different_connection_id), + ) + .unwrap(); + assert_eq!(result, ConnectionEstablishedResult::Reject); + } + + #[tokio::test] + async fn guard_against_secondary_connections_with_different_connection_ids() { + // This is the repro case for https://github.com/paritytech/litep2p/issues/172. + let _ = tracing_subscriber::fmt() + .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) + .try_init(); + + let mut manager = TransportManagerBuilder::new().build(); + manager.register_transport(SupportedTransport::Tcp, Box::new(DummyTransport::new())); + + // Random peer ID. + let peer = PeerId::random(); + + let setup_dial_addr = |connection_id: u16| { + let dial_address = Multiaddr::empty() + .with(Protocol::Ip4(Ipv4Addr::new(127, 0, 0, 1))) + .with(Protocol::Tcp(8888 + connection_id)) + .with(Protocol::P2p( + Multihash::from_bytes(&peer.to_bytes()).unwrap(), + )); + let connection_id = ConnectionId::from(connection_id as usize); + + (dial_address, connection_id) + }; + + // Setup addresses. + let (first_addr, first_connection_id) = setup_dial_addr(0); + let (second_addr, _second_connection_id) = setup_dial_addr(1); + let (remote_addr, remote_connection_id) = setup_dial_addr(2); + + // Step 1. Dialing state to peer. + manager.dial_address(first_addr.clone()).await.unwrap(); + { + let peers = manager.peers.read(); + let peer_context = peers.get(&peer).unwrap(); + match &peer_context.state { + PeerState::Dialing { dial_record } => { + assert_eq!(dial_record.address, first_addr); + } + state => panic!("invalid state: {state:?}"), + } + } + + // Step 2. Connection established by the remote peer. + let result = manager + .on_connection_established( + peer, + &Endpoint::listener(remote_addr.clone(), remote_connection_id), + ) + .unwrap(); + assert_eq!(result, ConnectionEstablishedResult::Accept); + { + let peers = manager.peers.read(); + let peer_context = peers.get(&peer).unwrap(); + match &peer_context.state { + PeerState::Connected { + record, + secondary: Some(SecondaryOrDialing::Dialing(dial_record)), + } => { + assert_eq!(record.address, remote_addr); + assert_eq!(record.connection_id, remote_connection_id); + + assert_eq!(dial_record.address, first_addr); + assert_eq!(dial_record.connection_id, first_connection_id) + } + state => panic!("invalid state: {state:?}"), + } + } + + // Step 3. The peer disconnects while we have a dialing in flight. + let event = manager.on_connection_closed(peer, remote_connection_id).unwrap(); + match event { + TransportEvent::ConnectionClosed { + peer: event_peer, + connection_id: event_connection_id, + } => { + assert_eq!(peer, event_peer); + assert_eq!(event_connection_id, remote_connection_id); + } + event => panic!("invalid event: {event:?}"), + } + { + let peers = manager.peers.read(); + let peer_context = peers.get(&peer).unwrap(); + match &peer_context.state { + PeerState::Disconnected { dial_record } => { + let dial_record = dial_record.as_ref().unwrap(); + assert_eq!(dial_record.address, first_addr); + assert_eq!(dial_record.connection_id, first_connection_id); + } + state => panic!("invalid state: {state:?}"), + } + } + + // Step 4. Dial by the second address and expect to not overwrite the state. + manager.dial_address(second_addr.clone()).await.unwrap(); + // The state remains unchanged since we already have a dialing in flight. + { + let peers = manager.peers.read(); + let peer_context = peers.get(&peer).unwrap(); + match &peer_context.state { + PeerState::Disconnected { dial_record } => { + let dial_record = dial_record.as_ref().unwrap(); + assert_eq!(dial_record.address, first_addr); + assert_eq!(dial_record.connection_id, first_connection_id); + } + state => panic!("invalid state: {state:?}"), + } + } + + // Step 5. Remote peer reconnects again. + let result = manager + .on_connection_established( + peer, + &Endpoint::listener(remote_addr.clone(), remote_connection_id), + ) + .unwrap(); + assert_eq!(result, ConnectionEstablishedResult::Accept); + { + let peers = manager.peers.read(); + let peer_context = peers.get(&peer).unwrap(); + match &peer_context.state { + PeerState::Connected { + record, + secondary: Some(SecondaryOrDialing::Dialing(dial_record)), + } => { + assert_eq!(record.address, remote_addr); + assert_eq!(record.connection_id, remote_connection_id); + + // We have not overwritten the first dial record in step 4. + assert_eq!(dial_record.address, first_addr); + assert_eq!(dial_record.connection_id, first_connection_id); + } + state => panic!("invalid state: {state:?}"), + } + } + + // Step 6. First dial responds. + let result = manager + .on_connection_established( + peer, + &Endpoint::dialer(first_addr.clone(), first_connection_id), + ) + .unwrap(); + assert_eq!(result, ConnectionEstablishedResult::Accept); + } + + #[tokio::test] + async fn persist_dial_addresses() { + let _ = tracing_subscriber::fmt() + .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) + .try_init(); + + let mut manager = TransportManagerBuilder::new().build(); + let peer = PeerId::random(); + let dial_address = Multiaddr::empty() + .with(Protocol::Ip4(Ipv4Addr::new(127, 0, 0, 1))) + .with(Protocol::Tcp(8888)) + .with(Protocol::P2p( + Multihash::from_bytes(&peer.to_bytes()).unwrap(), + )); + + let connection_id = ConnectionId::from(0); + let transport = Box::new({ + let mut transport = DummyTransport::new(); + transport.inject_event(TransportEvent::ConnectionEstablished { + peer, + endpoint: Endpoint::listener(dial_address.clone(), connection_id), + }); + transport + }); + manager.register_transport(SupportedTransport::Tcp, transport); + + // First dial attempt. + manager.dial_address(dial_address.clone()).await.unwrap(); + // check the state of the peer. + { + let peers = manager.peers.read(); + let peer_context = peers.get(&peer).unwrap(); + match &peer_context.state { + PeerState::Dialing { dial_record } => { + assert_eq!(dial_record.address, dial_address); + } + state => panic!("invalid state: {state:?}"), + } + + // The address is saved for future dials. + assert_eq!( + peer_context.addresses.addresses.get(&dial_address).unwrap().score(), + 0 + ); + } + + let second_address = Multiaddr::empty() + .with(Protocol::Ip4(Ipv4Addr::new(127, 0, 0, 1))) + .with(Protocol::Tcp(8889)) + .with(Protocol::P2p( + Multihash::from_bytes(&peer.to_bytes()).unwrap(), + )); + + // Second dial attempt with different address. + manager.dial_address(second_address.clone()).await.unwrap(); + // check the state of the peer. + { + let peers = manager.peers.read(); + let peer_context = peers.get(&peer).unwrap(); + match &peer_context.state { + // Must still be dialing the first address. + PeerState::Dialing { dial_record } => { + assert_eq!(dial_record.address, dial_address); + } + state => panic!("invalid state: {state:?}"), + } + + // The address is still saved, even if a second dial is not initiated. + assert_eq!( + peer_context.addresses.addresses.get(&dial_address).unwrap().score(), + 0 + ); + assert_eq!( + peer_context.addresses.addresses.get(&second_address).unwrap().score(), + 0 + ); + } + } + + #[cfg(feature = "websocket")] + #[tokio::test] + async fn opening_errors_are_reported() { + let _ = tracing_subscriber::fmt() + .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) + .try_init(); + + let mut manager = TransportManagerBuilder::new().build(); + let peer = PeerId::random(); + let connection_id = ConnectionId::from(0); + + // Setup TCP transport. + let dial_address_tcp = Multiaddr::empty() + .with(Protocol::Ip4(Ipv4Addr::new(127, 0, 0, 1))) + .with(Protocol::Tcp(8888)) + .with(Protocol::P2p( + Multihash::from_bytes(&peer.to_bytes()).unwrap(), + )); + let transport = Box::new({ + let mut transport = DummyTransport::new(); + transport.inject_event(TransportEvent::OpenFailure { + connection_id, + errors: vec![(dial_address_tcp.clone(), DialError::Timeout)], + }); + transport + }); + manager.register_transport(SupportedTransport::Tcp, transport); + manager.add_known_address( + peer, + vec![Multiaddr::empty() + .with(Protocol::Ip4(Ipv4Addr::new(192, 168, 1, 5))) + .with(Protocol::Tcp(8888)) + .with(Protocol::P2p(Multihash::from(peer)))] + .into_iter(), + ); + + // Setup WebSockets transport. + let dial_address_ws = Multiaddr::empty() + .with(Protocol::Ip4(Ipv4Addr::new(127, 0, 0, 1))) + .with(Protocol::Tcp(8889)) + .with(Protocol::Ws(Cow::Borrowed("/"))) + .with(Protocol::P2p( + Multihash::from_bytes(&peer.to_bytes()).unwrap(), + )); + + let transport = Box::new({ + let mut transport = DummyTransport::new(); + transport.inject_event(TransportEvent::OpenFailure { + connection_id, + errors: vec![(dial_address_ws.clone(), DialError::Timeout)], + }); + transport + }); + manager.register_transport(SupportedTransport::WebSocket, transport); + manager.add_known_address( + peer, + vec![Multiaddr::empty() + .with(Protocol::Ip4(Ipv4Addr::new(192, 168, 1, 5))) + .with(Protocol::Tcp(8889)) + .with(Protocol::Ws(Cow::Borrowed("/"))) + .with(Protocol::P2p( + Multihash::from_bytes(&peer.to_bytes()).unwrap(), + ))] + .into_iter(), + ); + + // Dial the peer on both transports. + assert!(manager.dial(peer).await.is_ok()); + assert!(!manager.pending_connections.is_empty()); + + { + let peers = manager.peers.read(); + + match peers.get(&peer) { + Some(PeerContext { + state: PeerState::Opening { .. }, + .. + }) => {} + state => panic!("invalid state for peer: {state:?}"), + } + } + + match manager.next().await.unwrap() { + TransportEvent::OpenFailure { + connection_id, + errors, + } => { + assert_eq!(connection_id, ConnectionId::from(0)); + assert_eq!(errors.len(), 2); + let tcp = errors.iter().find(|(addr, _)| addr == &dial_address_tcp).unwrap(); + assert!(std::matches!(tcp.1, DialError::Timeout)); + + let ws = errors.iter().find(|(addr, _)| addr == &dial_address_ws).unwrap(); + assert!(std::matches!(ws.1, DialError::Timeout)); + } + event => panic!("invalid event: {event:?}"), + } + assert!(manager.pending_connections.is_empty()); + assert!(manager.opening_errors.is_empty()); + } +} diff --git a/client/litep2p/src/transport/manager/peer_state.rs b/client/litep2p/src/transport/manager/peer_state.rs new file mode 100644 index 00000000..ec18e918 --- /dev/null +++ b/client/litep2p/src/transport/manager/peer_state.rs @@ -0,0 +1,946 @@ +// Copyright 2024 litep2p developers +// +// Permission is hereby granted, free of charge, to any person obtaining a +// copy of this software and associated documentation files (the "Software"), +// to deal in the Software without restriction, including without limitation +// the rights to use, copy, modify, merge, publish, distribute, sublicense, +// and/or sell copies of the Software, and to permit persons to whom the +// Software is furnished to do so, subject to the following conditions: +// +// The above copyright notice and this permission notice shall be included in +// all copies or substantial portions of the Software. +// +// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS +// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE +// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER +// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING +// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER +// DEALINGS IN THE SOFTWARE. + +//! Peer state management. + +use crate::{ + transport::{ + manager::{SupportedTransport, LOG_TARGET}, + Endpoint, + }, + types::ConnectionId, + PeerId, +}; + +use multiaddr::{Multiaddr, Protocol}; + +use std::collections::HashSet; + +/// The peer state that tracks connections and dialing attempts. +/// +/// # State Machine +/// +/// ## [`PeerState::Disconnected`] +/// +/// Initially, the peer is in the [`PeerState::Disconnected`] state without a +/// [`PeerState::Disconnected::dial_record`]. This means the peer is fully disconnected. +/// +/// Next states: +/// - [`PeerState::Disconnected`] -> [`PeerState::Dialing`] (via [`PeerState::dial_single_address`]) +/// - [`PeerState::Disconnected`] -> [`PeerState::Opening`] (via [`PeerState::dial_addresses`]) +/// +/// ## [`PeerState::Dialing`] +/// +/// The peer can transition to the [`PeerState::Dialing`] state when a dialing attempt is +/// initiated. This only happens when the peer is dialed on a single address via +/// [`PeerState::dial_single_address`], or when a socket connection established +/// in [`PeerState::Opening`] is upgraded to noise and yamux negotiation phase. +/// +/// The dialing state implies the peer is reached on the socket address provided, as well as +/// negotiating noise and yamux protocols. +/// +/// Next states: +/// - [`PeerState::Dialing`] -> [`PeerState::Connected`] (via +/// [`PeerState::on_connection_established`]) +/// - [`PeerState::Dialing`] -> [`PeerState::Disconnected`] (via [`PeerState::on_dial_failure`]) +/// +/// ## [`PeerState::Opening`] +/// +/// The peer can transition to the [`PeerState::Opening`] state when a dialing attempt is +/// initiated on multiple addresses via [`PeerState::dial_addresses`]. This takes into account +/// the parallelism factor (8 maximum) of the dialing attempts. +/// +/// The opening state holds information about which protocol is being dialed to properly report back +/// errors. +/// +/// The opening state is similar to the dial state, however the peer is only reached on a socket +/// address. The noise and yamux protocols are not negotiated yet. This state transitions to +/// [`PeerState::Dialing`] for the final part of the negotiation. Please note that it would be +/// wasteful to negotiate the noise and yamux protocols on all addresses, since only one +/// connection is kept around. +/// +/// Next states: +/// - [`PeerState::Opening`] -> [`PeerState::Dialing`] (via transport manager +/// `on_connection_opened`) +/// - [`PeerState::Opening`] -> [`PeerState::Disconnected`] (via transport manager +/// `on_connection_opened` if negotiation cannot be started or via `on_open_failure`) +/// - [`PeerState::Opening`] -> [`PeerState::Connected`] (via transport manager +/// `on_connection_established` when an incoming connection is accepted) +#[derive(Debug, Clone, PartialEq)] +pub enum PeerState { + /// `Litep2p` is connected to peer. + Connected { + /// The established record of the connection. + record: ConnectionRecord, + + /// Secondary record, this can either be a dial record or an established connection. + /// + /// While the local node was dialing a remote peer, the remote peer might've dialed + /// the local node and connection was established successfully. The original dial + /// address is stored for processing later when the dial attempt concludes as + /// either successful/failed. + secondary: Option, + }, + + /// Connection to peer is opening over one or more addresses. + Opening { + /// Address records used for dialing. + addresses: HashSet, + + /// Connection ID. + connection_id: ConnectionId, + + /// Active transports. + transports: HashSet, + }, + + /// Peer is being dialed. + Dialing { + /// Address record. + dial_record: ConnectionRecord, + }, + + /// `Litep2p` is not connected to peer. + Disconnected { + /// Dial address, if it exists. + /// + /// While the local node was dialing a remote peer, the remote peer might've dialed + /// the local node and connection was established successfully. The connection might've + /// been closed before the dial concluded which means that + /// [`crate::transport::manager::TransportManager`] must be prepared to handle the dial + /// failure even after the connection has been closed. + dial_record: Option, + }, +} + +/// The state of the secondary connection. +#[derive(Debug, Clone, PartialEq)] +pub enum SecondaryOrDialing { + /// The secondary connection is established. + Secondary(ConnectionRecord), + /// The primary connection is established, but the secondary connection is still dialing. + Dialing(ConnectionRecord), +} + +/// Result of initiating a dial. +#[derive(Debug, Clone, PartialEq)] +pub enum StateDialResult { + /// The peer is already connected. + AlreadyConnected, + /// The dialing state is already in progress. + DialingInProgress, + /// The peer is disconnected, start dialing. + Ok, +} + +impl PeerState { + /// Check if the peer can be dialed. + pub fn can_dial(&self) -> StateDialResult { + match self { + // The peer is already connected, no need to dial again. + Self::Connected { .. } => StateDialResult::AlreadyConnected, + // The dialing state is already in progress, an event will be emitted later. + Self::Dialing { .. } + | Self::Opening { .. } + | Self::Disconnected { + dial_record: Some(_), + } => StateDialResult::DialingInProgress, + + Self::Disconnected { dial_record: None } => StateDialResult::Ok, + } + } + + /// Dial the peer on a single address. + pub fn dial_single_address(&mut self, dial_record: ConnectionRecord) -> StateDialResult { + match self.can_dial() { + StateDialResult::Ok => { + *self = PeerState::Dialing { dial_record }; + StateDialResult::Ok + } + reason => reason, + } + } + + /// Dial the peer on multiple addresses. + pub fn dial_addresses( + &mut self, + connection_id: ConnectionId, + addresses: HashSet, + transports: HashSet, + ) -> StateDialResult { + match self.can_dial() { + StateDialResult::Ok => { + *self = PeerState::Opening { + addresses, + connection_id, + transports, + }; + StateDialResult::Ok + } + reason => reason, + } + } + + /// Handle dial failure. + /// + /// # Transitions + /// + /// - [`PeerState::Dialing`] (with record) -> [`PeerState::Disconnected`] + /// - [`PeerState::Connected`] (with dial record) -> [`PeerState::Connected`] + /// - [`PeerState::Disconnected`] (with dial record) -> [`PeerState::Disconnected`] + /// + /// Returns `true` if the connection was handled. + pub fn on_dial_failure(&mut self, connection_id: ConnectionId) -> bool { + match self { + // Clear the dial record if the connection ID matches. + Self::Dialing { dial_record } => + if dial_record.connection_id == connection_id { + *self = Self::Disconnected { dial_record: None }; + return true; + }, + + Self::Connected { + record, + secondary: Some(SecondaryOrDialing::Dialing(dial_record)), + } => + if dial_record.connection_id == connection_id { + *self = Self::Connected { + record: record.clone(), + secondary: None, + }; + return true; + }, + + Self::Disconnected { + dial_record: Some(dial_record), + } => + if dial_record.connection_id == connection_id { + *self = Self::Disconnected { dial_record: None }; + return true; + }, + + Self::Opening { .. } | Self::Connected { .. } | Self::Disconnected { .. } => + return false, + }; + + false + } + + /// Returns `true` if the connection should be accepted by the transport manager. + pub fn on_connection_established(&mut self, connection: ConnectionRecord) -> bool { + match self { + // Transform the dial record into a secondary connection. + Self::Connected { + record, + secondary: Some(SecondaryOrDialing::Dialing(dial_record)), + } => + if dial_record.connection_id == connection.connection_id { + *self = Self::Connected { + record: record.clone(), + secondary: Some(SecondaryOrDialing::Secondary(connection)), + }; + + return true; + }, + + // There's place for a secondary connection. + Self::Connected { + record, + secondary: None, + } => { + *self = Self::Connected { + record: record.clone(), + secondary: Some(SecondaryOrDialing::Secondary(connection)), + }; + + return true; + } + + // Convert the dial record into a primary connection or preserve it. + Self::Dialing { dial_record } + | Self::Disconnected { + dial_record: Some(dial_record), + } => + if dial_record.connection_id == connection.connection_id { + *self = Self::Connected { + record: connection.clone(), + secondary: None, + }; + return true; + } else { + *self = Self::Connected { + record: connection, + secondary: Some(SecondaryOrDialing::Dialing(dial_record.clone())), + }; + return true; + }, + + Self::Disconnected { dial_record: None } => { + *self = Self::Connected { + record: connection, + secondary: None, + }; + + return true; + } + + // Accept the incoming connection. + Self::Opening { + addresses, + connection_id, + .. + } => { + tracing::trace!( + target: LOG_TARGET, + ?connection, + opening_addresses = ?addresses, + opening_connection_id = ?connection_id, + "Connection established while opening" + ); + + *self = Self::Connected { + record: connection, + secondary: None, + }; + + return true; + } + + _ => {} + }; + + false + } + + /// Returns `true` if the connection was closed. + pub fn on_connection_closed(&mut self, connection_id: ConnectionId) -> bool { + match self { + Self::Connected { record, secondary } => { + // Primary connection closed. + if record.connection_id == connection_id { + match secondary { + // Promote secondary connection to primary. + Some(SecondaryOrDialing::Secondary(secondary)) => { + *self = Self::Connected { + record: secondary.clone(), + secondary: None, + }; + } + // Preserve the dial record. + Some(SecondaryOrDialing::Dialing(dial_record)) => { + *self = Self::Disconnected { + dial_record: Some(dial_record.clone()), + }; + + return true; + } + None => { + *self = Self::Disconnected { dial_record: None }; + + return true; + } + }; + + return false; + } + + match secondary { + // Secondary connection closed. + Some(SecondaryOrDialing::Secondary(secondary)) + if secondary.connection_id == connection_id => + { + *self = Self::Connected { + record: record.clone(), + secondary: None, + }; + } + _ => (), + } + } + _ => (), + } + + false + } + + /// Returns `true` if the last transport failed to open. + pub fn on_open_failure(&mut self, transport: SupportedTransport) -> bool { + match self { + Self::Opening { transports, .. } => { + transports.remove(&transport); + + if transports.is_empty() { + *self = Self::Disconnected { dial_record: None }; + return true; + } + + false + } + _ => false, + } + } + + /// Returns `true` if the connection was opened. + pub fn on_connection_opened(&mut self, record: ConnectionRecord) -> bool { + match self { + Self::Opening { + addresses, + connection_id, + .. + } => { + if record.connection_id != *connection_id || !addresses.contains(&record.address) { + tracing::warn!( + target: LOG_TARGET, + ?record, + ?addresses, + ?connection_id, + "Connection opened for unknown address or connection ID", + ); + } + + *self = Self::Dialing { + dial_record: record.clone(), + }; + + true + } + _ => false, + } + } +} + +/// The connection record keeps track of the connection ID and the address of the connection. +/// +/// The connection ID is used to track the connection in the transport layer. +/// While the address is used to keep a healthy view of the network for dialing purposes. +/// +/// # Note +/// +/// The structure is used to keep track of: +/// +/// - dialing state for outbound connections. +/// - established outbound connections via [`PeerState::Connected`]. +/// - established inbound connections via `PeerContext::secondary_connection`. +#[derive(Debug, Clone, Hash, PartialEq)] +pub struct ConnectionRecord { + /// Address of the connection. + /// + /// The address must contain the peer ID extension `/p2p/`. + pub address: Multiaddr, + + /// Connection ID resulted from dialing. + pub connection_id: ConnectionId, +} + +impl ConnectionRecord { + /// Construct a new connection record. + pub fn new(peer: PeerId, address: Multiaddr, connection_id: ConnectionId) -> Self { + Self { + address: Self::ensure_peer_id(peer, address), + connection_id, + } + } + + /// Create a new connection record from the peer ID and the endpoint. + pub fn from_endpoint(peer: PeerId, endpoint: &Endpoint) -> Self { + Self { + address: Self::ensure_peer_id(peer, endpoint.address().clone()), + connection_id: endpoint.connection_id(), + } + } + + /// Ensures the peer ID is present in the address. + fn ensure_peer_id(peer: PeerId, mut address: Multiaddr) -> Multiaddr { + if let Some(Protocol::P2p(multihash)) = address.iter().last() { + if multihash != *peer.as_ref() { + tracing::warn!( + target: LOG_TARGET, + ?address, + ?peer, + "Peer ID mismatch in address", + ); + + address.pop(); + address.push(Protocol::P2p(*peer.as_ref())); + } + + address + } else { + address.with(Protocol::P2p(*peer.as_ref())) + } + } +} + +#[cfg(test)] +mod tests { + use super::*; + + #[test] + fn state_can_dial() { + let state = PeerState::Disconnected { dial_record: None }; + assert_eq!(state.can_dial(), StateDialResult::Ok); + + let record = ConnectionRecord::new( + PeerId::random(), + "/ip4/1.1.1.1/tcp/80".parse().unwrap(), + ConnectionId::from(0), + ); + + let state = PeerState::Disconnected { + dial_record: Some(record.clone()), + }; + assert_eq!(state.can_dial(), StateDialResult::DialingInProgress); + + let state = PeerState::Dialing { + dial_record: record.clone(), + }; + assert_eq!(state.can_dial(), StateDialResult::DialingInProgress); + + let state = PeerState::Opening { + addresses: Default::default(), + connection_id: ConnectionId::from(0), + transports: Default::default(), + }; + assert_eq!(state.can_dial(), StateDialResult::DialingInProgress); + + let state = PeerState::Connected { + record, + secondary: None, + }; + assert_eq!(state.can_dial(), StateDialResult::AlreadyConnected); + } + + #[test] + fn state_dial_single_address() { + let record = ConnectionRecord::new( + PeerId::random(), + "/ip4/1.1.1.1/tcp/80".parse().unwrap(), + ConnectionId::from(0), + ); + + let mut state = PeerState::Disconnected { dial_record: None }; + assert_eq!( + state.dial_single_address(record.clone()), + StateDialResult::Ok + ); + assert_eq!( + state, + PeerState::Dialing { + dial_record: record + } + ); + } + + #[test] + fn state_dial_addresses() { + let mut state = PeerState::Disconnected { dial_record: None }; + assert_eq!( + state.dial_addresses( + ConnectionId::from(0), + Default::default(), + Default::default() + ), + StateDialResult::Ok + ); + assert_eq!( + state, + PeerState::Opening { + addresses: Default::default(), + connection_id: ConnectionId::from(0), + transports: Default::default() + } + ); + } + + #[test] + fn check_dial_failure() { + let record = ConnectionRecord::new( + PeerId::random(), + "/ip4/1.1.1.1/tcp/80".parse().unwrap(), + ConnectionId::from(0), + ); + + // Check from the dialing state. + { + let mut state = PeerState::Dialing { + dial_record: record.clone(), + }; + let previous_state = state.clone(); + // Check with different connection ID. + state.on_dial_failure(ConnectionId::from(1)); + assert_eq!(state, previous_state); + + // Check with the same connection ID. + state.on_dial_failure(ConnectionId::from(0)); + assert_eq!(state, PeerState::Disconnected { dial_record: None }); + } + + // Check from the connected state without dialing state. + { + let mut state = PeerState::Connected { + record: record.clone(), + secondary: None, + }; + let previous_state = state.clone(); + // Check with different connection ID. + state.on_dial_failure(ConnectionId::from(1)); + assert_eq!(state, previous_state); + + // Check with the same connection ID. + // The connection ID is checked against dialing records, not established connections. + state.on_dial_failure(ConnectionId::from(0)); + assert_eq!(state, previous_state); + } + + // Check from the connected state with dialing state. + { + let mut state = PeerState::Connected { + record: record.clone(), + secondary: Some(SecondaryOrDialing::Dialing(record.clone())), + }; + let previous_state = state.clone(); + // Check with different connection ID. + state.on_dial_failure(ConnectionId::from(1)); + assert_eq!(state, previous_state); + + // Check with the same connection ID. + // Dial record is cleared. + state.on_dial_failure(ConnectionId::from(0)); + assert_eq!( + state, + PeerState::Connected { + record: record.clone(), + secondary: None, + } + ); + } + + // Check from the disconnected state. + { + let mut state = PeerState::Disconnected { + dial_record: Some(record.clone()), + }; + let previous_state = state.clone(); + // Check with different connection ID. + state.on_dial_failure(ConnectionId::from(1)); + assert_eq!(state, previous_state); + + // Check with the same connection ID. + state.on_dial_failure(ConnectionId::from(0)); + assert_eq!(state, PeerState::Disconnected { dial_record: None }); + } + } + + #[test] + fn check_connection_established() { + let record = ConnectionRecord::new( + PeerId::random(), + "/ip4/1.1.1.1/tcp/80".parse().unwrap(), + ConnectionId::from(0), + ); + let second_record = ConnectionRecord::new( + PeerId::random(), + "/ip4/1.1.1.1/tcp/80".parse().unwrap(), + ConnectionId::from(1), + ); + + // Check from the connected state without secondary connection. + { + let mut state = PeerState::Connected { + record: record.clone(), + secondary: None, + }; + // Secondary is established. + assert!(state.on_connection_established(record.clone())); + assert_eq!( + state, + PeerState::Connected { + record: record.clone(), + secondary: Some(SecondaryOrDialing::Secondary(record.clone())), + } + ); + } + + // Check from the connected state with secondary dialing connection. + { + let mut state = PeerState::Connected { + record: record.clone(), + secondary: Some(SecondaryOrDialing::Dialing(record.clone())), + }; + // Promote the secondary connection. + assert!(state.on_connection_established(record.clone())); + assert_eq!( + state, + PeerState::Connected { + record: record.clone(), + secondary: Some(SecondaryOrDialing::Secondary(record.clone())), + } + ); + } + + // Check from the connected state with secondary established connection. + { + let mut state = PeerState::Connected { + record: record.clone(), + secondary: Some(SecondaryOrDialing::Secondary(record.clone())), + }; + // No state to advance. + assert!(!state.on_connection_established(record.clone())); + } + + // Opening state is completely wiped out. + { + let mut state = PeerState::Opening { + addresses: Default::default(), + connection_id: ConnectionId::from(0), + transports: Default::default(), + }; + assert!(state.on_connection_established(record.clone())); + assert_eq!( + state, + PeerState::Connected { + record: record.clone(), + secondary: None, + } + ); + } + + // Disconnected state with dial record. + { + let mut state = PeerState::Disconnected { + dial_record: Some(record.clone()), + }; + assert!(state.on_connection_established(record.clone())); + assert_eq!( + state, + PeerState::Connected { + record: record.clone(), + secondary: None, + } + ); + } + + // Disconnected with different dial record. + { + let mut state = PeerState::Disconnected { + dial_record: Some(record.clone()), + }; + assert!(state.on_connection_established(second_record.clone())); + assert_eq!( + state, + PeerState::Connected { + record: second_record.clone(), + secondary: Some(SecondaryOrDialing::Dialing(record.clone())) + } + ); + } + + // Disconnected without dial record. + { + let mut state = PeerState::Disconnected { dial_record: None }; + assert!(state.on_connection_established(record.clone())); + assert_eq!( + state, + PeerState::Connected { + record: record.clone(), + secondary: None, + } + ); + } + + // Dialing with different dial record. + { + let mut state = PeerState::Dialing { + dial_record: record.clone(), + }; + assert!(state.on_connection_established(second_record.clone())); + assert_eq!( + state, + PeerState::Connected { + record: second_record.clone(), + secondary: Some(SecondaryOrDialing::Dialing(record.clone())) + } + ); + } + + // Dialing with the same dial record. + { + let mut state = PeerState::Dialing { + dial_record: record.clone(), + }; + assert!(state.on_connection_established(record.clone())); + assert_eq!( + state, + PeerState::Connected { + record: record.clone(), + secondary: None, + } + ); + } + } + + #[test] + fn check_connection_closed() { + let record = ConnectionRecord::new( + PeerId::random(), + "/ip4/1.1.1.1/tcp/80".parse().unwrap(), + ConnectionId::from(0), + ); + let second_record = ConnectionRecord::new( + PeerId::random(), + "/ip4/1.1.1.1/tcp/80".parse().unwrap(), + ConnectionId::from(1), + ); + + // Primary is closed + { + let mut state = PeerState::Connected { + record: record.clone(), + secondary: None, + }; + assert!(state.on_connection_closed(ConnectionId::from(0))); + assert_eq!(state, PeerState::Disconnected { dial_record: None }); + } + + // Primary is closed with secondary promoted + { + let mut state = PeerState::Connected { + record: record.clone(), + secondary: Some(SecondaryOrDialing::Secondary(second_record.clone())), + }; + // Peer is still connected. + assert!(!state.on_connection_closed(ConnectionId::from(0))); + assert_eq!( + state, + PeerState::Connected { + record: second_record.clone(), + secondary: None, + } + ); + } + + // Primary is closed with secondary dial record + { + let mut state = PeerState::Connected { + record: record.clone(), + secondary: Some(SecondaryOrDialing::Dialing(second_record.clone())), + }; + assert!(state.on_connection_closed(ConnectionId::from(0))); + assert_eq!( + state, + PeerState::Disconnected { + dial_record: Some(second_record.clone()) + } + ); + } + } + + #[test] + fn check_open_failure() { + let mut state = PeerState::Opening { + addresses: Default::default(), + connection_id: ConnectionId::from(0), + transports: [SupportedTransport::Tcp].into_iter().collect(), + }; + + // This is the last protocol + assert!(state.on_open_failure(SupportedTransport::Tcp)); + assert_eq!(state, PeerState::Disconnected { dial_record: None }); + } + + #[test] + fn check_open_connection() { + let record = ConnectionRecord::new( + PeerId::random(), + "/ip4/1.1.1.1/tcp/80".parse().unwrap(), + ConnectionId::from(0), + ); + + let mut state = PeerState::Opening { + addresses: Default::default(), + connection_id: ConnectionId::from(0), + transports: [SupportedTransport::Tcp].into_iter().collect(), + }; + + assert!(state.on_connection_opened(record.clone())); + } + + #[test] + fn check_full_lifecycle() { + let record = ConnectionRecord::new( + PeerId::random(), + "/ip4/1.1.1.1/tcp/80".parse().unwrap(), + ConnectionId::from(0), + ); + + let mut state = PeerState::Disconnected { dial_record: None }; + // Dialing. + assert_eq!( + state.dial_single_address(record.clone()), + StateDialResult::Ok + ); + assert_eq!( + state, + PeerState::Dialing { + dial_record: record.clone() + } + ); + + // Dialing failed. + state.on_dial_failure(ConnectionId::from(0)); + assert_eq!(state, PeerState::Disconnected { dial_record: None }); + + // Opening. + assert_eq!( + state.dial_addresses( + ConnectionId::from(0), + Default::default(), + Default::default() + ), + StateDialResult::Ok + ); + + // Open failure. + assert!(state.on_open_failure(SupportedTransport::Tcp)); + assert_eq!(state, PeerState::Disconnected { dial_record: None }); + + // Dial again. + assert_eq!( + state.dial_single_address(record.clone()), + StateDialResult::Ok + ); + assert_eq!( + state, + PeerState::Dialing { + dial_record: record.clone() + } + ); + + // Successful dial. + assert!(state.on_connection_established(record.clone())); + assert_eq!( + state, + PeerState::Connected { + record: record.clone(), + secondary: None + } + ); + } +} diff --git a/client/litep2p/src/transport/manager/types.rs b/client/litep2p/src/transport/manager/types.rs new file mode 100644 index 00000000..15eb2c50 --- /dev/null +++ b/client/litep2p/src/transport/manager/types.rs @@ -0,0 +1,59 @@ +// Copyright 2023 litep2p developers +// +// Permission is hereby granted, free of charge, to any person obtaining a +// copy of this software and associated documentation files (the "Software"), +// to deal in the Software without restriction, including without limitation +// the rights to use, copy, modify, merge, publish, distribute, sublicense, +// and/or sell copies of the Software, and to permit persons to whom the +// Software is furnished to do so, subject to the following conditions: +// +// The above copyright notice and this permission notice shall be included in +// all copies or substantial portions of the Software. +// +// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS +// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE +// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER +// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING +// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER +// DEALINGS IN THE SOFTWARE. + +use crate::transport::manager::{address::AddressStore, peer_state::PeerState}; + +/// Supported protocols. +#[derive(Debug, Copy, Clone, Hash, PartialEq, Eq)] +pub enum SupportedTransport { + /// TCP. + Tcp, + + /// QUIC. + #[cfg(feature = "quic")] + Quic, + + /// WebRTC + #[cfg(feature = "webrtc")] + WebRtc, + + /// WebSocket + #[cfg(feature = "websocket")] + WebSocket, +} + +/// Peer context. +#[derive(Debug)] +pub struct PeerContext { + /// Peer state. + pub state: PeerState, + + /// Known addresses of peer. + pub addresses: AddressStore, +} + +impl Default for PeerContext { + fn default() -> Self { + Self { + state: PeerState::Disconnected { dial_record: None }, + addresses: AddressStore::new(), + } + } +} diff --git a/client/litep2p/src/transport/mod.rs b/client/litep2p/src/transport/mod.rs new file mode 100644 index 00000000..c7c8726e --- /dev/null +++ b/client/litep2p/src/transport/mod.rs @@ -0,0 +1,237 @@ +// Copyright 2023 litep2p developers +// +// Permission is hereby granted, free of charge, to any person obtaining a +// copy of this software and associated documentation files (the "Software"), +// to deal in the Software without restriction, including without limitation +// the rights to use, copy, modify, merge, publish, distribute, sublicense, +// and/or sell copies of the Software, and to permit persons to whom the +// Software is furnished to do so, subject to the following conditions: +// +// The above copyright notice and this permission notice shall be included in +// all copies or substantial portions of the Software. +// +// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS +// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE +// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER +// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING +// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER +// DEALINGS IN THE SOFTWARE. + +//! Transport protocol implementations provided by [`Litep2p`](`crate::Litep2p`). + +use crate::{error::DialError, transport::manager::TransportHandle, types::ConnectionId, PeerId}; + +use futures::{future::BoxFuture, Stream}; +use hickory_resolver::TokioResolver; +use multiaddr::Multiaddr; + +use std::{fmt::Debug, sync::Arc, time::Duration}; + +pub(crate) mod common; +#[cfg(feature = "quic")] +pub mod quic; +pub mod tcp; +#[cfg(feature = "webrtc")] +pub mod webrtc; +#[cfg(feature = "websocket")] +pub mod websocket; + +#[cfg(test)] +pub(crate) mod dummy; + +pub(crate) mod manager; + +pub use manager::limits::{ConnectionLimitsConfig, ConnectionLimitsError}; + +/// Timeout for opening a connection. +pub(crate) const CONNECTION_OPEN_TIMEOUT: Duration = Duration::from_secs(10); + +/// Timeout for opening a substream. +pub(crate) const SUBSTREAM_OPEN_TIMEOUT: Duration = Duration::from_secs(5); + +/// Timeout for connection waiting new substreams. +pub(crate) const KEEP_ALIVE_TIMEOUT: Duration = Duration::from_secs(5); + +/// Maximum number of parallel dial attempts. +pub(crate) const MAX_PARALLEL_DIALS: usize = 8; + +/// Multiplier applied to `connection_open_timeout` to derive the overall dial deadline. +/// +/// When dialing multiple addresses concurrently, the total time allowed is +/// `DIAL_DEADLINE_MULTIPLIER * connection_open_timeout`. This gives enough time +/// to cycle through addresses without stalling indefinitely. +pub(crate) const DIAL_DEADLINE_MULTIPLIER: u32 = 2; + +/// Connection endpoint. +#[derive(Debug, Clone, PartialEq, Eq)] +pub enum Endpoint { + /// Successfully established outbound connection. + Dialer { + /// Address that was dialed. + address: Multiaddr, + + /// Connection ID. + connection_id: ConnectionId, + }, + + /// Successfully established inbound connection. + Listener { + /// Local connection address. + address: Multiaddr, + + /// Connection ID. + connection_id: ConnectionId, + }, +} + +impl Endpoint { + /// Get `Multiaddr` of the [`Endpoint`]. + pub fn address(&self) -> &Multiaddr { + match self { + Self::Dialer { address, .. } => address, + Self::Listener { address, .. } => address, + } + } + + /// Crate dialer. + pub(crate) fn dialer(address: Multiaddr, connection_id: ConnectionId) -> Self { + Endpoint::Dialer { + address, + connection_id, + } + } + + /// Create listener. + pub(crate) fn listener(address: Multiaddr, connection_id: ConnectionId) -> Self { + Endpoint::Listener { + address, + connection_id, + } + } + + /// Get `ConnectionId` of the `Endpoint`. + pub fn connection_id(&self) -> ConnectionId { + match self { + Self::Dialer { connection_id, .. } => *connection_id, + Self::Listener { connection_id, .. } => *connection_id, + } + } + + /// Is this a listener endpoint? + pub fn is_listener(&self) -> bool { + std::matches!(self, Self::Listener { .. }) + } +} + +/// Transport event. +#[derive(Debug)] +pub(crate) enum TransportEvent { + /// Fully negotiated connection established to remote peer. + ConnectionEstablished { + /// Peer ID. + peer: PeerId, + + /// Endpoint. + endpoint: Endpoint, + }, + + PendingInboundConnection { + /// Connection ID. + connection_id: ConnectionId, + }, + + /// Connection opened to remote but not yet negotiated. + ConnectionOpened { + /// Connection ID. + connection_id: ConnectionId, + + /// Address that was dialed. + address: Multiaddr, + + /// Errors from unsuccessful dial attempts. + errors: Vec<(Multiaddr, DialError)>, + }, + + /// Connection closed to remote peer. + #[allow(unused)] + ConnectionClosed { + /// Peer ID. + peer: PeerId, + + /// Connection ID. + connection_id: ConnectionId, + }, + + /// Failed to dial remote peer. + DialFailure { + /// Connection ID. + connection_id: ConnectionId, + + /// Dialed address. + address: Multiaddr, + + /// Error. + error: DialError, + }, + + /// Open failure for an unnegotiated set of connections. + OpenFailure { + /// Connection ID. + connection_id: ConnectionId, + + /// Errors. + errors: Vec<(Multiaddr, DialError)>, + }, +} + +pub(crate) trait TransportBuilder { + type Config: Debug; + type Transport: Transport; + + /// Create new [`Transport`] object. + fn new( + context: TransportHandle, + config: Self::Config, + resolver: Arc, + ) -> crate::Result<(Self, Vec)> + where + Self: Sized; +} + +pub(crate) trait Transport: Stream + Unpin + Send { + /// Dial `address` and negotiate connection. + fn dial(&mut self, connection_id: ConnectionId, address: Multiaddr) -> crate::Result<()>; + + /// Accept negotiated connection. + /// + /// Returns a future that completes when the connection has been fully established + /// and all installed protocols have been notified via their event channels. + /// This ensures that by the time the caller receives a ConnectionEstablished event, + /// protocols are ready to handle substream operations. + fn accept( + &mut self, + connection_id: ConnectionId, + ) -> crate::Result>>; + + /// Accept pending connection. + fn accept_pending(&mut self, connection_id: ConnectionId) -> crate::Result<()>; + + /// Reject pending connection. + fn reject_pending(&mut self, connection_id: ConnectionId) -> crate::Result<()>; + + /// Reject negotiated connection. + fn reject(&mut self, connection_id: ConnectionId) -> crate::Result<()>; + + /// Attempt to open connection to remote peer over one or more addresses. + fn open(&mut self, connection_id: ConnectionId, addresses: Vec) + -> crate::Result<()>; + + /// Negotiate opened connection. + fn negotiate(&mut self, connection_id: ConnectionId) -> crate::Result<()>; + + /// Cancel opening connections. + /// + /// This is a no-op for connections that have already succeeded/canceled. + fn cancel(&mut self, connection_id: ConnectionId); +} diff --git a/client/litep2p/src/transport/quic/config.rs b/client/litep2p/src/transport/quic/config.rs new file mode 100644 index 00000000..8ed30fce --- /dev/null +++ b/client/litep2p/src/transport/quic/config.rs @@ -0,0 +1,58 @@ +// Copyright 2023 litep2p developers +// +// Permission is hereby granted, free of charge, to any person obtaining a +// copy of this software and associated documentation files (the "Software"), +// to deal in the Software without restriction, including without limitation +// the rights to use, copy, modify, merge, publish, distribute, sublicense, +// and/or sell copies of the Software, and to permit persons to whom the +// Software is furnished to do so, subject to the following conditions: +// +// The above copyright notice and this permission notice shall be included in +// all copies or substantial portions of the Software. +// +// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS +// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE +// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER +// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING +// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER +// DEALINGS IN THE SOFTWARE. + +//! QUIC transport configuration. + +use crate::transport::{CONNECTION_OPEN_TIMEOUT, SUBSTREAM_OPEN_TIMEOUT}; + +use multiaddr::Multiaddr; + +use std::time::Duration; + +/// QUIC transport configuration. +#[derive(Debug)] +pub struct Config { + /// Listen address for the transport. + /// + /// Default listen addres is `/ip4/127.0.0.1/udp/0/quic-v1`. + pub listen_addresses: Vec, + + /// Connection open timeout. + /// + /// How long should litep2p wait for a connection to be opend before the host + /// is deemed unreachable. + pub connection_open_timeout: Duration, + + /// Substream open timeout. + /// + /// How long should litep2p wait for a substream to be opened before considering + /// the substream rejected. + pub substream_open_timeout: Duration, +} + +impl Default for Config { + fn default() -> Self { + Self { + listen_addresses: vec!["/ip4/127.0.0.1/udp/0/quic-v1".parse().expect("valid address")], + connection_open_timeout: CONNECTION_OPEN_TIMEOUT, + substream_open_timeout: SUBSTREAM_OPEN_TIMEOUT, + } + } +} diff --git a/client/litep2p/src/transport/quic/connection.rs b/client/litep2p/src/transport/quic/connection.rs new file mode 100644 index 00000000..2d91cac3 --- /dev/null +++ b/client/litep2p/src/transport/quic/connection.rs @@ -0,0 +1,409 @@ +// Copyright 2023 litep2p developers +// +// Permission is hereby granted, free of charge, to any person obtaining a +// copy of this software and associated documentation files (the "Software"), +// to deal in the Software without restriction, including without limitation +// the rights to use, copy, modify, merge, publish, distribute, sublicense, +// and/or sell copies of the Software, and to permit persons to whom the +// Software is furnished to do so, subject to the following conditions: +// +// The above copyright notice and this permission notice shall be included in +// all copies or substantial portions of the Software. +// +// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS +// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE +// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER +// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING +// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER +// DEALINGS IN THE SOFTWARE. + +//! QUIC connection. + +use std::{collections::HashMap, time::Duration}; + +use crate::{ + config::Role, + error::{Error, NegotiationError, SubstreamError}, + multistream_select::{dialer_select_proto, listener_select_proto, Negotiated, Version}, + protocol::{Direction, Permit, ProtocolCommand, ProtocolSet, SubstreamKeepAlive}, + substream, + transport::{ + quic::substream::{NegotiatingSubstream, Substream}, + Endpoint, + }, + types::{protocol::ProtocolName, SubstreamId}, + BandwidthSink, PeerId, +}; + +use futures::{future::BoxFuture, stream::FuturesUnordered, AsyncRead, AsyncWrite, StreamExt}; +use quinn::{Connection as QuinnConnection, RecvStream, SendStream}; + +/// Logging target for the file. +const LOG_TARGET: &str = "litep2p::quic::connection"; + +/// QUIC connection error. +#[derive(Debug)] +enum ConnectionError { + /// Timeout + Timeout { + /// Protocol. + protocol: Option, + + /// Substream ID. + substream_id: Option, + }, + + /// Failed to negotiate connection/substream. + FailedToNegotiate { + /// Protocol. + protocol: Option, + + /// Substream ID. + substream_id: Option, + + /// Error. + error: SubstreamError, + }, +} + +struct NegotiatedSubstream { + /// Substream direction. + direction: Direction, + + /// Substream ID. + substream_id: SubstreamId, + + /// Protocol name. + protocol: ProtocolName, + + /// Substream used to send data. + sender: SendStream, + + /// Substream used to receive data. + receiver: RecvStream, + + /// Permit. + permit: Permit, + + /// Whether this substream should keep connection alive while it exists. + keep_alive: SubstreamKeepAlive, +} + +/// QUIC connection. +pub struct QuicConnection { + /// Remote peer ID. + peer: PeerId, + + /// Endpoint. + endpoint: Endpoint, + + /// Substream open timeout. + substream_open_timeout: Duration, + + /// QUIC connection. + connection: QuinnConnection, + + /// Protocol set. + protocol_set: ProtocolSet, + + /// Bandwidth sink. + bandwidth_sink: BandwidthSink, + + /// Pending substreams. + pending_substreams: + FuturesUnordered>>, +} + +impl QuicConnection { + /// Creates a new [`QuicConnection`]. + pub fn new( + peer: PeerId, + endpoint: Endpoint, + connection: QuinnConnection, + protocol_set: ProtocolSet, + bandwidth_sink: BandwidthSink, + substream_open_timeout: Duration, + ) -> Self { + Self { + peer, + endpoint, + connection, + protocol_set, + bandwidth_sink, + substream_open_timeout, + pending_substreams: FuturesUnordered::new(), + } + } + + /// Negotiate protocol. + async fn negotiate_protocol( + stream: S, + role: &Role, + protocols: Vec<&str>, + ) -> Result<(Negotiated, ProtocolName), NegotiationError> { + tracing::trace!(target: LOG_TARGET, ?protocols, "negotiating protocols"); + + let (protocol, socket) = match role { + Role::Dialer => dialer_select_proto(stream, protocols, Version::V1).await, + Role::Listener => listener_select_proto(stream, protocols).await, + } + .map_err(NegotiationError::MultistreamSelectError)?; + + tracing::trace!(target: LOG_TARGET, ?protocol, "protocol negotiated"); + + Ok((socket, ProtocolName::from(protocol.to_string()))) + } + + /// Open substream for `protocol`. + async fn open_substream( + handle: QuinnConnection, + permit: Permit, + substream_id: SubstreamId, + protocol: ProtocolName, + fallback_names: Vec, + keep_alive: SubstreamKeepAlive, + ) -> Result { + tracing::debug!(target: LOG_TARGET, ?protocol, ?substream_id, "open substream"); + + let stream = match handle.open_bi().await { + Ok((send_stream, recv_stream)) => NegotiatingSubstream::new(send_stream, recv_stream), + Err(error) => return Err(NegotiationError::Quic(error.into()).into()), + }; + + // TODO: https://github.com/paritytech/litep2p/issues/346 protocols don't change after + // they've been initialized so this should be done only once + let protocols = std::iter::once(&*protocol) + .chain(fallback_names.iter().map(|protocol| &**protocol)) + .collect(); + + let (io, protocol) = Self::negotiate_protocol(stream, &Role::Dialer, protocols).await?; + + tracing::trace!( + target: LOG_TARGET, + ?protocol, + ?substream_id, + "substream accepted and negotiated" + ); + + let stream = io.inner(); + let (sender, receiver) = stream.into_parts(); + + Ok(NegotiatedSubstream { + sender, + receiver, + substream_id, + direction: Direction::Outbound(substream_id), + permit, + protocol, + keep_alive, + }) + } + + /// Accept bidirectional substream from rmeote peer. + async fn accept_substream( + stream: NegotiatingSubstream, + protocols: HashMap, + substream_id: SubstreamId, + permit: Permit, + ) -> Result { + tracing::trace!( + target: LOG_TARGET, + ?substream_id, + "accept inbound substream" + ); + + let protocol_names = protocols.keys().map(|protocol| &**protocol).collect::>(); + let (io, protocol) = + Self::negotiate_protocol(stream, &Role::Listener, protocol_names).await?; + let keep_alive = *protocols.get(&protocol).expect("protocol to be one of the keys"); + + tracing::trace!( + target: LOG_TARGET, + ?substream_id, + ?protocol, + "substream accepted and negotiated" + ); + + let stream = io.inner(); + let (sender, receiver) = stream.into_parts(); + + Ok(NegotiatedSubstream { + permit, + sender, + receiver, + protocol, + substream_id, + direction: Direction::Inbound, + keep_alive, + }) + } + + /// Start the connection event loop without notifying protocols. + /// This is used when protocols have already been notified during accept(). + pub(crate) async fn start(mut self) -> crate::Result<()> { + loop { + tokio::select! { + event = self.connection.accept_bi() => match event { + Ok((send_stream, receive_stream)) => { + + let substream = self.protocol_set.next_substream_id(); + let protocols = self.protocol_set.protocols_with_keep_alives(); + let permit = self.protocol_set.try_get_permit().ok_or(Error::ConnectionClosed)?; + let stream = NegotiatingSubstream::new(send_stream, receive_stream); + let substream_open_timeout = self.substream_open_timeout; + + self.pending_substreams.push(Box::pin(async move { + match tokio::time::timeout( + substream_open_timeout, + Self::accept_substream(stream, protocols, substream, permit), + ) + .await + { + Ok(Ok(substream)) => Ok(substream), + Ok(Err(error)) => Err(ConnectionError::FailedToNegotiate { + protocol: None, + substream_id: None, + error: SubstreamError::NegotiationError(error), + }), + Err(_) => Err(ConnectionError::Timeout { + protocol: None, + substream_id: None + }), + } + })); + } + Err(error) => { + tracing::debug!(target: LOG_TARGET, peer = ?self.peer, ?error, "failed to accept substream"); + return self.protocol_set.report_connection_closed(self.peer, self.endpoint.connection_id()).await; + } + }, + substream = self.pending_substreams.select_next_some(), if !self.pending_substreams.is_empty() => { + match substream { + Err(error) => { + tracing::debug!( + target: LOG_TARGET, + ?error, + "failed to accept/open substream", + ); + + let (protocol, substream_id, error) = match error { + ConnectionError::Timeout { protocol, substream_id } => { + (protocol, substream_id, SubstreamError::NegotiationError(NegotiationError::Timeout)) + } + ConnectionError::FailedToNegotiate { protocol, substream_id, error } => { + (protocol, substream_id, error) + } + }; + + if let (Some(protocol), Some(substream_id)) = (protocol, substream_id) { + self.protocol_set + .report_substream_open_failure(protocol, substream_id, error) + .await?; + } + } + Ok(substream) => { + let protocol = substream.protocol.clone(); + let substream_id = substream.substream_id; + let direction = substream.direction; + let bandwidth_sink = self.bandwidth_sink.clone(); + let opening_permit = substream.permit; + let lifetime_permit = + substream.keep_alive.then(|| opening_permit.clone()); + + let substream = substream::Substream::new_quic( + self.peer, + substream_id, + Substream::new( + lifetime_permit, + substream.sender, + substream.receiver, + bandwidth_sink + ), + self.protocol_set.protocol_codec(&protocol) + ); + + self.protocol_set.report_substream_open( + self.peer, + protocol, + direction, + substream, + opening_permit, + ).await?; + } + } + } + command = self.protocol_set.next() => match command { + None => { + tracing::debug!( + target: LOG_TARGET, + peer = ?self.peer, + connection_id = ?self.endpoint.connection_id(), + "protocols have dropped connection" + ); + return self.protocol_set.report_connection_closed( + self.peer, + self.endpoint.connection_id(), + ).await; + } + Some(ProtocolCommand::OpenSubstream { + protocol, + fallback_names, + substream_id, + permit, + keep_alive, + connection_id: _, + }) => { + let connection = self.connection.clone(); + let substream_open_timeout = self.substream_open_timeout; + + tracing::trace!( + target: LOG_TARGET, + ?protocol, + ?fallback_names, + ?substream_id, + "open substream" + ); + + self.pending_substreams.push(Box::pin(async move { + match tokio::time::timeout( + substream_open_timeout, + Self::open_substream( + connection, + permit, + substream_id, + protocol.clone(), + fallback_names, + keep_alive, + ), + ) + .await + { + Ok(Ok(substream)) => Ok(substream), + Ok(Err(error)) => Err(ConnectionError::FailedToNegotiate { + protocol: Some(protocol), + substream_id: Some(substream_id), + error, + }), + Err(_) => Err(ConnectionError::Timeout { + protocol: None, + substream_id: None + }), + } + })); + } + Some(ProtocolCommand::ForceClose) => { + tracing::debug!( + target: LOG_TARGET, + peer = ?self.peer, + connection_id = ?self.endpoint.connection_id(), + "force closing connection", + ); + + return self.protocol_set.report_connection_closed(self.peer, self.endpoint.connection_id()).await; + } + } + } + } + } +} diff --git a/client/litep2p/src/transport/quic/listener.rs b/client/litep2p/src/transport/quic/listener.rs new file mode 100644 index 00000000..77760b62 --- /dev/null +++ b/client/litep2p/src/transport/quic/listener.rs @@ -0,0 +1,428 @@ +// Copyright 2023 litep2p developers +// +// Permission is hereby granted, free of charge, to any person obtaining a +// copy of this software and associated documentation files (the "Software"), +// to deal in the Software without restriction, including without limitation +// the rights to use, copy, modify, merge, publish, distribute, sublicense, +// and/or sell copies of the Software, and to permit persons to whom the +// Software is furnished to do so, subject to the following conditions: +// +// The above copyright notice and this permission notice shall be included in +// all copies or substantial portions of the Software. +// +// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS +// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE +// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER +// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING +// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER +// DEALINGS IN THE SOFTWARE. + +use crate::{ + crypto::{ed25519::Keypair, tls::make_server_config}, + error::AddressError, + PeerId, +}; + +use futures::{future::BoxFuture, stream::FuturesUnordered, FutureExt, Stream, StreamExt}; +use multiaddr::{Multiaddr, Protocol}; +use quinn::{Connecting, Endpoint, ServerConfig}; + +use std::{ + net::{IpAddr, SocketAddr}, + pin::Pin, + sync::Arc, + task::{Context, Poll}, +}; + +/// Logging target for the file. +const LOG_TARGET: &str = "litep2p::quic::listener"; + +/// QUIC listener. +pub struct QuicListener { + /// Listen addresses. + _listen_addresses: Vec, + + /// Listeners. + listeners: Vec, + + /// Incoming connections. + incoming: FuturesUnordered>>, +} + +impl QuicListener { + /// Create new [`QuicListener`]. + pub fn new( + keypair: &Keypair, + addresses: Vec, + ) -> crate::Result<(Self, Vec)> { + let mut listeners: Vec = Vec::new(); + let mut listen_addresses = Vec::new(); + + for address in addresses.into_iter() { + let (listen_address, _) = Self::get_socket_address(&address)?; + let crypto_config = Arc::new(make_server_config(keypair).expect("to succeed")); + let server_config = ServerConfig::with_crypto(crypto_config); + let listener = Endpoint::server(server_config, listen_address).unwrap(); + + let listen_address = listener.local_addr()?; + listen_addresses.push(listen_address); + listeners.push(listener); + // ); + } + + let listen_multi_addresses = listen_addresses + .iter() + .cloned() + .map(|address| { + Multiaddr::empty() + .with(Protocol::from(address.ip())) + .with(Protocol::Udp(address.port())) + .with(Protocol::QuicV1) + }) + .collect(); + + Ok(( + Self { + incoming: listeners + .iter_mut() + .enumerate() + .map(|(i, listener)| { + let inner = listener.clone(); + async move { inner.accept().await.map(|connecting| (i, connecting)) } + .boxed() + }) + .collect(), + listeners, + _listen_addresses: listen_addresses, + }, + listen_multi_addresses, + )) + } + + /// Extract socket address and `PeerId`, if found, from `address`. + pub fn get_socket_address( + address: &Multiaddr, + ) -> Result<(SocketAddr, Option), AddressError> { + tracing::trace!(target: LOG_TARGET, ?address, "parse multi address"); + + let mut iter = address.iter(); + let socket_address = match iter.next() { + Some(Protocol::Ip6(address)) => match iter.next() { + Some(Protocol::Udp(port)) => SocketAddr::new(IpAddr::V6(address), port), + protocol => { + tracing::error!( + target: LOG_TARGET, + ?protocol, + "invalid transport protocol, expected `QuicV1`", + ); + return Err(AddressError::InvalidProtocol); + } + }, + Some(Protocol::Ip4(address)) => match iter.next() { + Some(Protocol::Udp(port)) => SocketAddr::new(IpAddr::V4(address), port), + protocol => { + tracing::error!( + target: LOG_TARGET, + ?protocol, + "invalid transport protocol, expected `QuicV1`", + ); + return Err(AddressError::InvalidProtocol); + } + }, + protocol => { + tracing::error!(target: LOG_TARGET, ?protocol, "invalid transport protocol"); + return Err(AddressError::InvalidProtocol); + } + }; + + // verify that quic exists + match iter.next() { + Some(Protocol::QuicV1) => {} + _ => return Err(AddressError::InvalidProtocol), + } + + let maybe_peer = match iter.next() { + Some(Protocol::P2p(multihash)) => Some(PeerId::from_multihash(multihash)?), + None => None, + protocol => { + tracing::error!( + target: LOG_TARGET, + ?protocol, + "invalid protocol, expected `P2p` or `None`" + ); + return Err(AddressError::PeerIdMissing); + } + }; + + Ok((socket_address, maybe_peer)) + } +} + +impl Stream for QuicListener { + type Item = Connecting; + + fn poll_next(mut self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll> { + if self.incoming.is_empty() { + return Poll::Pending; + } + + match futures::ready!(self.incoming.poll_next_unpin(cx)) { + None => Poll::Ready(None), + Some(None) => Poll::Ready(None), + Some(Some((listener, future))) => { + let inner = self.listeners[listener].clone(); + self.incoming.push( + async move { inner.accept().await.map(|connecting| (listener, connecting)) } + .boxed(), + ); + + Poll::Ready(Some(future)) + } + } + } +} + +#[cfg(test)] +mod tests { + use crate::crypto::tls::make_client_config; + + use super::*; + use quinn::ClientConfig; + use std::net::{IpAddr, Ipv4Addr, Ipv6Addr, SocketAddr}; + + #[test] + fn parse_multiaddresses() { + assert!(QuicListener::get_socket_address( + &"/ip6/::1/udp/8888/quic-v1".parse().expect("valid multiaddress") + ) + .is_ok()); + assert!(QuicListener::get_socket_address( + &"/ip4/127.0.0.1/udp/8888/quic-v1".parse().expect("valid multiaddress") + ) + .is_ok()); + assert!(QuicListener::get_socket_address( + &"/ip6/::1/udp/8888/quic-v1/p2p/12D3KooWT2ouvz5uMmCvHJGzAGRHiqDts5hzXR7NdoQ27pGdzp9Q" + .parse() + .expect("valid multiaddress") + ) + .is_ok()); + assert!(QuicListener::get_socket_address( + &"/ip4/127.0.0.1/udp/8888/quic-v1/p2p/12D3KooWT2ouvz5uMmCvHJGzAGRHiqDts5hzXR7NdoQ27pGdzp9Q" + .parse() + .expect("valid multiaddress") + ) + .is_ok()); + assert!(QuicListener::get_socket_address( + &"/ip6/::1/tcp/8888/quic-v1/p2p/12D3KooWT2ouvz5uMmCvHJGzAGRHiqDts5hzXR7NdoQ27pGdzp9Q" + .parse() + .expect("valid multiaddress") + ) + .is_err()); + assert!(QuicListener::get_socket_address( + &"/ip4/127.0.0.1/udp/8888/p2p/12D3KooWT2ouvz5uMmCvHJGzAGRHiqDts5hzXR7NdoQ27pGdzp9Q" + .parse() + .expect("valid multiaddress") + ) + .is_err()); + assert!(QuicListener::get_socket_address( + &"/ip4/127.0.0.1/tcp/8888/p2p/12D3KooWT2ouvz5uMmCvHJGzAGRHiqDts5hzXR7NdoQ27pGdzp9Q" + .parse() + .expect("valid multiaddress") + ) + .is_err()); + assert!(QuicListener::get_socket_address( + &"/dns/google.com/tcp/8888/p2p/12D3KooWT2ouvz5uMmCvHJGzAGRHiqDts5hzXR7NdoQ27pGdzp9Q" + .parse() + .expect("valid multiaddress") + ) + .is_err()); + assert!(QuicListener::get_socket_address( + &"/ip6/::1/udp/8888/quic-v1/utp".parse().expect("valid multiaddress") + ) + .is_err()); + } + + #[tokio::test] + async fn no_listeners() { + let (mut listener, _) = QuicListener::new(&Keypair::generate(), Vec::new()).unwrap(); + + futures::future::poll_fn(|cx| match listener.poll_next_unpin(cx) { + Poll::Pending => Poll::Ready(()), + event => panic!("unexpected event: {event:?}"), + }) + .await; + } + + #[tokio::test] + async fn one_listener() { + let address: Multiaddr = "/ip6/::1/udp/0/quic-v1".parse().unwrap(); + let keypair = Keypair::generate(); + let peer = PeerId::from_public_key(&keypair.public().into()); + let (mut listener, listen_addresses) = + QuicListener::new(&keypair, vec![address.clone()]).unwrap(); + let Some(Protocol::Udp(port)) = listen_addresses.first().unwrap().clone().iter().nth(1) + else { + panic!("invalid address"); + }; + + let crypto_config = + Arc::new(make_client_config(&Keypair::generate(), Some(peer)).expect("to succeed")); + let client_config = ClientConfig::new(crypto_config); + let client = + Endpoint::client(SocketAddr::new(IpAddr::V6(Ipv6Addr::UNSPECIFIED), 0)).unwrap(); + let connection = client + .connect_with(client_config, format!("[::1]:{port}").parse().unwrap(), "l") + .unwrap(); + + let (res1, res2) = tokio::join!( + listener.next(), + Box::pin(async move { + match connection.await { + Ok(connection) => Ok(connection), + Err(error) => Err(error), + } + }) + ); + + assert!(res1.is_some() && res2.is_ok()); + } + + #[tokio::test] + async fn two_listeners() { + let _ = tracing_subscriber::fmt() + .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) + .try_init(); + + let address1: Multiaddr = "/ip6/::1/udp/0/quic-v1".parse().unwrap(); + let address2: Multiaddr = "/ip4/127.0.0.1/udp/0/quic-v1".parse().unwrap(); + let keypair = Keypair::generate(); + let peer = PeerId::from_public_key(&keypair.public().into()); + + let (mut listener, listen_addresses) = + QuicListener::new(&keypair, vec![address1, address2]).unwrap(); + + let Some(Protocol::Udp(port1)) = listen_addresses.first().unwrap().clone().iter().nth(1) + else { + panic!("invalid address"); + }; + + let Some(Protocol::Udp(port2)) = + listen_addresses.iter().nth(1).unwrap().clone().iter().nth(1) + else { + panic!("invalid address"); + }; + + let crypto_config1 = + Arc::new(make_client_config(&Keypair::generate(), Some(peer)).expect("to succeed")); + let client_config1 = ClientConfig::new(crypto_config1); + let client1 = + Endpoint::client(SocketAddr::new(IpAddr::V6(Ipv6Addr::UNSPECIFIED), 0)).unwrap(); + let connection1 = client1 + .connect_with( + client_config1, + format!("[::1]:{port1}").parse().unwrap(), + "l", + ) + .unwrap(); + + let crypto_config2 = + Arc::new(make_client_config(&Keypair::generate(), Some(peer)).expect("to succeed")); + let client_config2 = ClientConfig::new(crypto_config2); + let client2 = + Endpoint::client(SocketAddr::new(IpAddr::V4(Ipv4Addr::UNSPECIFIED), 0)).unwrap(); + let connection2 = client2 + .connect_with( + client_config2, + format!("127.0.0.1:{port2}").parse().unwrap(), + "l", + ) + .unwrap(); + + tokio::spawn(async move { + match connection1.await { + Ok(connection) => Ok(connection), + Err(error) => Err(error), + } + }); + + tokio::spawn(async move { + match connection2.await { + Ok(connection) => Ok(connection), + Err(error) => Err(error), + } + }); + + for _ in 0..2 { + let _ = listener.next().await; + } + } + + #[tokio::test] + async fn two_clients_dialing_same_address() { + let _ = tracing_subscriber::fmt() + .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) + .try_init(); + + let keypair = Keypair::generate(); + let peer = PeerId::from_public_key(&keypair.public().into()); + + let (mut listener, listen_addresses) = QuicListener::new( + &keypair, + vec![ + "/ip6/::1/udp/0/quic-v1".parse().unwrap(), + "/ip4/127.0.0.1/udp/0/quic-v1".parse().unwrap(), + ], + ) + .unwrap(); + + let Some(Protocol::Udp(port)) = listen_addresses.first().unwrap().clone().iter().nth(1) + else { + panic!("invalid address"); + }; + + let crypto_config1 = + Arc::new(make_client_config(&Keypair::generate(), Some(peer)).expect("to succeed")); + let client_config1 = ClientConfig::new(crypto_config1); + let client1 = + Endpoint::client(SocketAddr::new(IpAddr::V6(Ipv6Addr::UNSPECIFIED), 0)).unwrap(); + let connection1 = client1 + .connect_with( + client_config1, + format!("[::1]:{port}").parse().unwrap(), + "l", + ) + .unwrap(); + + let crypto_config2 = + Arc::new(make_client_config(&Keypair::generate(), Some(peer)).expect("to succeed")); + let client_config2 = ClientConfig::new(crypto_config2); + let client2 = + Endpoint::client(SocketAddr::new(IpAddr::V6(Ipv6Addr::UNSPECIFIED), 0)).unwrap(); + let connection2 = client2 + .connect_with( + client_config2, + format!("[::1]:{port}").parse().unwrap(), + "l", + ) + .unwrap(); + + tokio::spawn(async move { + match connection1.await { + Ok(connection) => Ok(connection), + Err(error) => Err(error), + } + }); + + tokio::spawn(async move { + match connection2.await { + Ok(connection) => Ok(connection), + Err(error) => Err(error), + } + }); + + for _ in 0..2 { + let _ = listener.next().await; + } + } +} diff --git a/client/litep2p/src/transport/quic/mod.rs b/client/litep2p/src/transport/quic/mod.rs new file mode 100644 index 00000000..708c8b24 --- /dev/null +++ b/client/litep2p/src/transport/quic/mod.rs @@ -0,0 +1,703 @@ +// Copyright 2021 Parity Technologies (UK) Ltd. +// Copyright 2022 Protocol Labs. +// Copyright 2023 litep2p developers +// +// Permission is hereby granted, free of charge, to any person obtaining a +// copy of this software and associated documentation files (the "Software"), +// to deal in the Software without restriction, including without limitation +// the rights to use, copy, modify, merge, publish, distribute, sublicense, +// and/or sell copies of the Software, and to permit persons to whom the +// Software is furnished to do so, subject to the following conditions: +// +// The above copyright notice and this permission notice shall be included in +// all copies or substantial portions of the Software. +// +// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS +// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE +// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER +// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING +// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER +// DEALINGS IN THE SOFTWARE. + +//! QUIC transport. + +use crate::{ + crypto::tls::make_client_config, + error::{AddressError, DialError, Error, QuicError}, + transport::{ + manager::TransportHandle, + quic::{config::Config as QuicConfig, connection::QuicConnection, listener::QuicListener}, + Endpoint as Litep2pEndpoint, Transport, TransportBuilder, TransportEvent, + }, + types::ConnectionId, + PeerId, +}; + +use futures::{ + future::BoxFuture, + stream::{AbortHandle, FuturesUnordered}, + Stream, StreamExt, TryFutureExt, +}; +use hickory_resolver::TokioResolver; +use multiaddr::{Multiaddr, Protocol}; +use quinn::{ClientConfig, Connecting, Connection, Endpoint, IdleTimeout}; + +use std::{ + collections::HashMap, + net::{IpAddr, Ipv4Addr, Ipv6Addr, SocketAddr}, + pin::Pin, + sync::Arc, + task::{Context, Poll}, +}; + +pub(crate) use substream::Substream; + +mod connection; +mod listener; +mod substream; + +pub mod config; + +/// Logging target for the file. +const LOG_TARGET: &str = "litep2p::quic"; + +#[derive(Debug)] +struct NegotiatedConnection { + /// Remote peer ID. + peer: PeerId, + + /// QUIC connection. + connection: Connection, +} + +#[derive(Debug)] +enum RawConnectionResult { + /// The first successful connection. + Connected { + connection_id: ConnectionId, + address: Multiaddr, + stream: NegotiatedConnection, + errors: Vec<(Multiaddr, DialError)>, + }, + + /// All connection attempts failed. + Failed { + connection_id: ConnectionId, + errors: Vec<(Multiaddr, DialError)>, + }, + + /// Future was canceled. + Canceled { connection_id: ConnectionId }, +} + +/// QUIC transport object. +pub(crate) struct QuicTransport { + /// Transport handle. + context: TransportHandle, + + /// Transport config. + config: QuicConfig, + + /// QUIC listener. + listener: QuicListener, + + /// Pending dials. + pending_dials: HashMap, + + /// Pending inbound connections. + pending_inbound_connections: HashMap, + + /// Pending connections. + pending_connections: FuturesUnordered< + BoxFuture<'static, (ConnectionId, Result)>, + >, + + /// Negotiated connections waiting for validation. + pending_open: HashMap, + + /// Pending raw, unnegotiated connections. + pending_raw_connections: FuturesUnordered>, + + /// Opened raw connection, waiting for approval/rejection from `TransportManager`. + opened_raw: HashMap, + + /// Cancel raw connections futures. + /// + /// This is cancelling `Self::pending_raw_connections`. + cancel_futures: HashMap, +} + +impl QuicTransport { + /// Attempt to extract `PeerId` from connection certificates. + fn extract_peer_id(connection: &Connection) -> Option { + let certificates: Box> = + connection.peer_identity()?.downcast().ok()?; + let p2p_cert = crate::crypto::tls::certificate::parse(certificates.first()?) + .expect("the certificate was validated during TLS handshake; qed"); + + Some(p2p_cert.peer_id()) + } + + /// Handle inbound accepted connection. + fn on_inbound_connection(&mut self, connection_id: ConnectionId, connection: Connecting) { + self.pending_connections.push(Box::pin(async move { + let connection = match connection.await { + Ok(connection) => connection, + Err(error) => return (connection_id, Err(DialError::from(error))), + }; + + let Some(peer) = Self::extract_peer_id(&connection) else { + return ( + connection_id, + Err(crate::error::NegotiationError::Quic(QuicError::InvalidCertificate).into()), + ); + }; + + (connection_id, Ok(NegotiatedConnection { peer, connection })) + })); + } + + /// Handle established connection. + fn on_connection_established( + &mut self, + connection_id: ConnectionId, + result: Result, + ) -> Option { + tracing::debug!(target: LOG_TARGET, ?connection_id, success = result.is_ok(), "connection established"); + + // `on_connection_established()` is called for both inbound and outbound connections + // but `pending_dials` will only contain entries for outbound connections. + let maybe_address = self.pending_dials.remove(&connection_id); + + match result { + Ok(connection) => { + let peer = connection.peer; + let endpoint = maybe_address.map_or( + { + let address = connection.connection.remote_address(); + Litep2pEndpoint::listener( + Multiaddr::empty() + .with(Protocol::from(address.ip())) + .with(Protocol::Udp(address.port())) + .with(Protocol::QuicV1), + connection_id, + ) + }, + |address| Litep2pEndpoint::dialer(address, connection_id), + ); + self.pending_open.insert(connection_id, (connection, endpoint.clone())); + + return Some(TransportEvent::ConnectionEstablished { peer, endpoint }); + } + Err(error) => { + tracing::debug!(target: LOG_TARGET, ?connection_id, ?error, "failed to establish connection"); + + // since the address was found from `pending_dials`, + // report the error to protocols and `TransportManager` + if let Some(address) = maybe_address { + return Some(TransportEvent::DialFailure { + connection_id, + address, + error, + }); + } + } + } + + None + } +} + +impl TransportBuilder for QuicTransport { + type Config = QuicConfig; + type Transport = QuicTransport; + + /// Create new [`QuicTransport`] object. + fn new( + context: TransportHandle, + mut config: Self::Config, + _resolver: Arc, + ) -> crate::Result<(Self, Vec)> + where + Self: Sized, + { + tracing::info!( + target: LOG_TARGET, + ?config, + "start quic transport", + ); + + let (listener, listen_addresses) = QuicListener::new( + &context.keypair, + std::mem::take(&mut config.listen_addresses), + )?; + + Ok(( + Self { + context, + config, + listener, + opened_raw: HashMap::new(), + pending_open: HashMap::new(), + pending_dials: HashMap::new(), + pending_inbound_connections: HashMap::new(), + pending_raw_connections: FuturesUnordered::new(), + pending_connections: FuturesUnordered::new(), + cancel_futures: HashMap::new(), + }, + listen_addresses, + )) + } +} + +impl Transport for QuicTransport { + fn dial(&mut self, connection_id: ConnectionId, address: Multiaddr) -> crate::Result<()> { + let Ok((socket_address, Some(peer))) = QuicListener::get_socket_address(&address) else { + return Err(Error::AddressError(AddressError::PeerIdMissing)); + }; + + let crypto_config = + Arc::new(make_client_config(&self.context.keypair, Some(peer)).expect("to succeed")); + let mut transport_config = quinn::TransportConfig::default(); + let timeout = + IdleTimeout::try_from(self.config.connection_open_timeout).expect("to succeed"); + transport_config.max_idle_timeout(Some(timeout)); + let mut client_config = ClientConfig::new(crypto_config); + client_config.transport_config(Arc::new(transport_config)); + + let client_listen_address = match address.iter().next() { + Some(Protocol::Ip6(_)) => SocketAddr::new(IpAddr::V6(Ipv6Addr::UNSPECIFIED), 0), + Some(Protocol::Ip4(_)) => SocketAddr::new(IpAddr::V4(Ipv4Addr::UNSPECIFIED), 0), + _ => return Err(Error::AddressError(AddressError::InvalidProtocol)), + }; + + let client = Endpoint::client(client_listen_address) + .map_err(|error| Error::Other(error.to_string()))?; + let connection = client + .connect_with(client_config, socket_address, "l") + .map_err(|error| Error::Other(error.to_string()))?; + + tracing::trace!( + target: LOG_TARGET, + ?address, + ?peer, + ?client_listen_address, + "dial peer", + ); + + self.pending_dials.insert(connection_id, address); + + self.pending_connections.push(Box::pin(async move { + let connection = match connection.await { + Ok(connection) => connection, + Err(error) => return (connection_id, Err(DialError::from(error))), + }; + + let Some(peer) = Self::extract_peer_id(&connection) else { + return ( + connection_id, + Err(crate::error::NegotiationError::Quic(QuicError::InvalidCertificate).into()), + ); + }; + + (connection_id, Ok(NegotiatedConnection { peer, connection })) + })); + + Ok(()) + } + + fn accept( + &mut self, + connection_id: ConnectionId, + ) -> crate::Result>> { + let (connection, endpoint) = self + .pending_open + .remove(&connection_id) + .ok_or(Error::ConnectionDoesntExist(connection_id))?; + let bandwidth_sink = self.context.bandwidth_sink.clone(); + let mut protocol_set = self.context.protocol_set(connection_id); + let substream_open_timeout = self.config.substream_open_timeout; + let executor = self.context.executor.clone(); + + tracing::trace!( + target: LOG_TARGET, + ?connection_id, + "start connection", + ); + + let peer = connection.peer; + let endpoint_clone = endpoint.clone(); + + Ok(Box::pin(async move { + // First, notify all protocols about the connection establishment + protocol_set.report_connection_established(peer, endpoint_clone).await?; + + // After protocols are notified, spawn the connection event loop + executor.run(Box::pin(async move { + let _ = QuicConnection::new( + peer, + endpoint, + connection.connection, + protocol_set, + bandwidth_sink, + substream_open_timeout, + ) + .start() + .await; + })); + + Ok(()) + })) + } + + fn reject(&mut self, connection_id: ConnectionId) -> crate::Result<()> { + self.pending_open + .remove(&connection_id) + .map_or(Err(Error::ConnectionDoesntExist(connection_id)), |_| Ok(())) + } + + fn accept_pending(&mut self, connection_id: ConnectionId) -> crate::Result<()> { + let connection = self + .pending_inbound_connections + .remove(&connection_id) + .ok_or(Error::ConnectionDoesntExist(connection_id))?; + + self.on_inbound_connection(connection_id, connection); + + Ok(()) + } + + fn reject_pending(&mut self, connection_id: ConnectionId) -> crate::Result<()> { + self.pending_inbound_connections + .remove(&connection_id) + .map_or(Err(Error::ConnectionDoesntExist(connection_id)), |_| Ok(())) + } + + fn open( + &mut self, + connection_id: ConnectionId, + addresses: Vec, + ) -> crate::Result<()> { + let num_addresses = addresses.len(); + let mut futures: FuturesUnordered<_> = addresses + .into_iter() + .map(|address| { + let keypair = self.context.keypair.clone(); + let connection_open_timeout = self.config.connection_open_timeout; + let addr = address.clone(); + + let future = async move { + let (socket_address, peer) = QuicListener::get_socket_address(&address) + .map_err(DialError::AddressError)?; + let peer = + peer.ok_or_else(|| DialError::AddressError(AddressError::PeerIdMissing))?; + + let crypto_config = + Arc::new(make_client_config(&keypair, Some(peer)).expect("to succeed")); + let mut transport_config = quinn::TransportConfig::default(); + let timeout = + IdleTimeout::try_from(connection_open_timeout).expect("to succeed"); + transport_config.max_idle_timeout(Some(timeout)); + let mut client_config = ClientConfig::new(crypto_config); + client_config.transport_config(Arc::new(transport_config)); + + let client_listen_address = match address.iter().next() { + Some(Protocol::Ip6(_)) => + SocketAddr::new(IpAddr::V6(Ipv6Addr::UNSPECIFIED), 0), + Some(Protocol::Ip4(_)) => + SocketAddr::new(IpAddr::V4(Ipv4Addr::UNSPECIFIED), 0), + _ => return Err(AddressError::InvalidProtocol.into()), + }; + + let client = match Endpoint::client(client_listen_address) { + Ok(client) => client, + Err(error) => { + return Err(DialError::from(error)); + } + }; + let connection = match client.connect_with(client_config, socket_address, "l") { + Ok(connection) => connection, + Err(error) => return Err(DialError::from(error)), + }; + + let connection = match connection.await { + Ok(connection) => connection, + Err(error) => return Err(DialError::from(error)), + }; + + let Some(peer) = Self::extract_peer_id(&connection) else { + return Err(crate::error::NegotiationError::Quic( + QuicError::InvalidCertificate, + ) + .into()); + }; + + Ok(NegotiatedConnection { peer, connection }) + }; + + async move { future.await.map(|ok| (addr.clone(), ok)).map_err(|err| (addr, err)) } + }) + .collect(); + + // Future that will resolve to the first successful connection. + let future = async move { + let mut errors = Vec::with_capacity(num_addresses); + + while let Some(result) = futures.next().await { + match result { + Ok((address, stream)) => + return RawConnectionResult::Connected { + connection_id, + address, + stream, + errors, + }, + Err(error) => { + tracing::debug!( + target: LOG_TARGET, + ?connection_id, + ?error, + "failed to open connection", + ); + errors.push(error) + } + } + } + + RawConnectionResult::Failed { + connection_id, + errors, + } + }; + + let (fut, handle) = futures::future::abortable(future); + let fut = fut.unwrap_or_else(move |_| RawConnectionResult::Canceled { connection_id }); + self.pending_raw_connections.push(Box::pin(fut)); + self.cancel_futures.insert(connection_id, handle); + + Ok(()) + } + + fn negotiate(&mut self, connection_id: ConnectionId) -> crate::Result<()> { + let (connection, _address) = self + .opened_raw + .remove(&connection_id) + .ok_or(Error::ConnectionDoesntExist(connection_id))?; + + self.pending_connections + .push(Box::pin(async move { (connection_id, Ok(connection)) })); + + Ok(()) + } + + /// Cancel opening connections. + fn cancel(&mut self, connection_id: ConnectionId) { + // Cancel the future if it exists. + // State clean-up happens inside the `poll_next`. + if let Some(handle) = self.cancel_futures.get(&connection_id) { + handle.abort(); + } + } +} + +impl Stream for QuicTransport { + type Item = TransportEvent; + + fn poll_next(mut self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll> { + if let Poll::Ready(Some(connection)) = self.listener.poll_next_unpin(cx) { + let connection_id = self.context.next_connection_id(); + + tracing::trace!( + target: LOG_TARGET, + ?connection_id, + "pending inbound connection", + ); + + self.pending_inbound_connections.insert(connection_id, connection); + + return Poll::Ready(Some(TransportEvent::PendingInboundConnection { + connection_id, + })); + } + + while let Poll::Ready(Some(result)) = self.pending_raw_connections.poll_next_unpin(cx) { + tracing::trace!(target: LOG_TARGET, ?result, "raw connection result"); + + match result { + RawConnectionResult::Connected { + connection_id, + address, + stream, + errors, + } => { + let Some(handle) = self.cancel_futures.remove(&connection_id) else { + tracing::warn!( + target: LOG_TARGET, + ?connection_id, + ?address, + "raw connection without a cancel handle", + ); + continue; + }; + + if !handle.is_aborted() { + self.opened_raw.insert(connection_id, (stream, address.clone())); + + return Poll::Ready(Some(TransportEvent::ConnectionOpened { + connection_id, + address, + errors, + })); + } + } + + RawConnectionResult::Failed { + connection_id, + errors, + } => { + let Some(handle) = self.cancel_futures.remove(&connection_id) else { + tracing::warn!( + target: LOG_TARGET, + ?connection_id, + ?errors, + "raw connection without a cancel handle", + ); + continue; + }; + + if !handle.is_aborted() { + return Poll::Ready(Some(TransportEvent::OpenFailure { + connection_id, + errors, + })); + } + } + + RawConnectionResult::Canceled { connection_id } => { + if self.cancel_futures.remove(&connection_id).is_none() { + tracing::warn!( + target: LOG_TARGET, + ?connection_id, + "raw cancelled connection without a cancel handle", + ); + } + } + } + } + + while let Poll::Ready(Some(connection)) = self.pending_connections.poll_next_unpin(cx) { + let (connection_id, result) = connection; + + match self.on_connection_established(connection_id, result) { + Some(event) => return Poll::Ready(Some(event)), + None => {} + } + } + + Poll::Pending + } +} + +#[cfg(test)] +mod tests { + use super::*; + use crate::{ + codec::ProtocolCodec, + crypto::ed25519::Keypair, + executor::DefaultExecutor, + protocol::SubstreamKeepAlive, + transport::manager::{ProtocolContext, TransportHandle}, + types::protocol::ProtocolName, + BandwidthSink, + }; + use multihash::Multihash; + use tokio::sync::mpsc::channel; + + #[tokio::test] + async fn test_quinn() { + let _ = tracing_subscriber::fmt() + .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) + .try_init(); + + let keypair1 = Keypair::generate(); + let (tx1, _rx1) = channel(64); + let (event_tx1, _event_rx1) = channel(64); + + let handle1 = TransportHandle { + executor: Arc::new(DefaultExecutor {}), + next_substream_id: Default::default(), + next_connection_id: Default::default(), + keypair: keypair1.clone(), + tx: event_tx1, + bandwidth_sink: BandwidthSink::new(), + + protocols: HashMap::from_iter([( + ProtocolName::from("/notif/1"), + ProtocolContext { + tx: tx1, + codec: ProtocolCodec::Identity(32), + fallback_names: Vec::new(), + keep_alive: SubstreamKeepAlive::Yes, + }, + )]), + }; + let resolver = Arc::new(TokioResolver::builder_tokio().unwrap().build()); + + let (mut transport1, listen_addresses) = + QuicTransport::new(handle1, Default::default(), resolver.clone()).unwrap(); + let listen_address = listen_addresses[0].clone(); + + let keypair2 = Keypair::generate(); + let (tx2, _rx2) = channel(64); + let (event_tx2, _event_rx2) = channel(64); + + let handle2 = TransportHandle { + executor: Arc::new(DefaultExecutor {}), + next_substream_id: Default::default(), + next_connection_id: Default::default(), + keypair: keypair2.clone(), + tx: event_tx2, + bandwidth_sink: BandwidthSink::new(), + + protocols: HashMap::from_iter([( + ProtocolName::from("/notif/1"), + ProtocolContext { + tx: tx2, + codec: ProtocolCodec::Identity(32), + fallback_names: Vec::new(), + keep_alive: SubstreamKeepAlive::Yes, + }, + )]), + }; + + let (mut transport2, _) = + QuicTransport::new(handle2, Default::default(), resolver).unwrap(); + let peer1: PeerId = PeerId::from_public_key(&keypair1.public().into()); + let _peer2: PeerId = PeerId::from_public_key(&keypair2.public().into()); + let listen_address = listen_address.with(Protocol::P2p( + Multihash::from_bytes(&peer1.to_bytes()).unwrap(), + )); + + transport2.dial(ConnectionId::new(), listen_address).unwrap(); + + let event = transport1.next().await.unwrap(); + match event { + TransportEvent::PendingInboundConnection { connection_id } => { + transport1.accept_pending(connection_id).unwrap(); + } + _ => panic!("unexpected event"), + } + + let (res1, res2) = tokio::join!(transport1.next(), transport2.next()); + + assert!(std::matches!( + res1, + Some(TransportEvent::ConnectionEstablished { .. }) + )); + assert!(std::matches!( + res2, + Some(TransportEvent::ConnectionEstablished { .. }) + )); + } +} diff --git a/client/litep2p/src/transport/quic/substream.rs b/client/litep2p/src/transport/quic/substream.rs new file mode 100644 index 00000000..8176e6af --- /dev/null +++ b/client/litep2p/src/transport/quic/substream.rs @@ -0,0 +1,174 @@ +// Copyright 2023 litep2p developers +// +// Permission is hereby granted, free of charge, to any person obtaining a +// copy of this software and associated documentation files (the "Software"), +// to deal in the Software without restriction, including without limitation +// the rights to use, copy, modify, merge, publish, distribute, sublicense, +// and/or sell copies of the Software, and to permit persons to whom the +// Software is furnished to do so, subject to the following conditions: +// +// The above copyright notice and this permission notice shall be included in +// all copies or substantial portions of the Software. +// +// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS +// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE +// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER +// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING +// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER +// DEALINGS IN THE SOFTWARE. + +use crate::{error::SubstreamError, BandwidthSink}; + +use bytes::Bytes; +use futures::{AsyncRead, AsyncWrite}; +use quinn::{RecvStream, SendStream}; +use tokio::io::{AsyncRead as TokioAsyncRead, AsyncWrite as TokioAsyncWrite}; +use tokio_util::compat::{Compat, TokioAsyncReadCompatExt, TokioAsyncWriteCompatExt}; + +use std::{ + io, + pin::Pin, + task::{Context, Poll}, +}; + +use crate::protocol::Permit; + +/// QUIC substream. +#[derive(Debug)] +pub struct Substream { + _lifetime_permit: Option, + bandwidth_sink: BandwidthSink, + send_stream: SendStream, + recv_stream: RecvStream, +} + +impl Substream { + /// Create new [`Substream`]. + pub fn new( + _lifetime_permit: Option, + send_stream: SendStream, + recv_stream: RecvStream, + bandwidth_sink: BandwidthSink, + ) -> Self { + Self { + _lifetime_permit, + send_stream, + recv_stream, + bandwidth_sink, + } + } + + /// Write `buffers` to the underlying socket. + pub async fn write_all_chunks(&mut self, buffers: &mut [Bytes]) -> Result<(), SubstreamError> { + let nwritten = buffers.iter().fold(0usize, |acc, buffer| acc + buffer.len()); + + match self + .send_stream + .write_all_chunks(buffers) + .await + .map_err(|_| SubstreamError::ConnectionClosed) + { + Ok(()) => { + self.bandwidth_sink.increase_outbound(nwritten); + Ok(()) + } + Err(error) => Err(error), + } + } +} + +impl TokioAsyncRead for Substream { + fn poll_read( + mut self: Pin<&mut Self>, + cx: &mut Context<'_>, + buf: &mut tokio::io::ReadBuf<'_>, + ) -> Poll> { + match futures::ready!(Pin::new(&mut self.recv_stream).poll_read(cx, buf)) { + Err(error) => Poll::Ready(Err(error)), + Ok(res) => { + self.bandwidth_sink.increase_inbound(buf.filled().len()); + Poll::Ready(Ok(res)) + } + } + } +} + +impl TokioAsyncWrite for Substream { + fn poll_write( + mut self: Pin<&mut Self>, + cx: &mut Context<'_>, + buf: &[u8], + ) -> Poll> { + match futures::ready!(Pin::new(&mut self.send_stream).poll_write(cx, buf)) { + Err(error) => Poll::Ready(Err(error)), + Ok(nwritten) => { + self.bandwidth_sink.increase_outbound(nwritten); + Poll::Ready(Ok(nwritten)) + } + } + } + + fn poll_flush(mut self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll> { + Pin::new(&mut self.send_stream).poll_flush(cx) + } + + fn poll_shutdown( + mut self: Pin<&mut Self>, + cx: &mut Context<'_>, + ) -> Poll> { + Pin::new(&mut self.send_stream).poll_shutdown(cx) + } +} + +/// Substream pair used to negotiate a protocol for the connection. +pub struct NegotiatingSubstream { + recv_stream: Compat, + send_stream: Compat, +} + +impl NegotiatingSubstream { + /// Create new [`NegotiatingSubstream`]. + pub fn new(send_stream: SendStream, recv_stream: RecvStream) -> Self { + Self { + recv_stream: TokioAsyncReadCompatExt::compat(recv_stream), + send_stream: TokioAsyncWriteCompatExt::compat_write(send_stream), + } + } + + /// Deconstruct [`NegotiatingSubstream`] into parts. + pub fn into_parts(self) -> (SendStream, RecvStream) { + let sender = self.send_stream.into_inner(); + let receiver = self.recv_stream.into_inner(); + + (sender, receiver) + } +} + +impl AsyncRead for NegotiatingSubstream { + fn poll_read( + mut self: Pin<&mut Self>, + cx: &mut Context<'_>, + buf: &mut [u8], + ) -> Poll> { + Pin::new(&mut self.recv_stream).poll_read(cx, buf) + } +} + +impl AsyncWrite for NegotiatingSubstream { + fn poll_write( + mut self: Pin<&mut Self>, + cx: &mut Context<'_>, + buf: &[u8], + ) -> Poll> { + Pin::new(&mut self.send_stream).poll_write(cx, buf) + } + + fn poll_flush(mut self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll> { + Pin::new(&mut self.send_stream).poll_flush(cx) + } + + fn poll_close(mut self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll> { + Pin::new(&mut self.send_stream).poll_close(cx) + } +} diff --git a/client/litep2p/src/transport/s2n-quic/config.rs b/client/litep2p/src/transport/s2n-quic/config.rs new file mode 100644 index 00000000..dd3808c8 --- /dev/null +++ b/client/litep2p/src/transport/s2n-quic/config.rs @@ -0,0 +1,30 @@ +// Copyright 2023 litep2p developers +// +// Permission is hereby granted, free of charge, to any person obtaining a +// copy of this software and associated documentation files (the "Software"), +// to deal in the Software without restriction, including without limitation +// the rights to use, copy, modify, merge, publish, distribute, sublicense, +// and/or sell copies of the Software, and to permit persons to whom the +// Software is furnished to do so, subject to the following conditions: +// +// The above copyright notice and this permission notice shall be included in +// all copies or substantial portions of the Software. +// +// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS +// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE +// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER +// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING +// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER +// DEALINGS IN THE SOFTWARE. + +//! QUIC transport configuration. + +use multiaddr::Multiaddr; + +/// QUIC transport configuration. +#[derive(Debug, Clone)] +pub struct Config { + /// Listen address address for the transport. + pub listen_address: Multiaddr, +} diff --git a/client/litep2p/src/transport/s2n-quic/connection.rs b/client/litep2p/src/transport/s2n-quic/connection.rs new file mode 100644 index 00000000..821e3743 --- /dev/null +++ b/client/litep2p/src/transport/s2n-quic/connection.rs @@ -0,0 +1,743 @@ +// Copyright 2023 litep2p developers +// +// Permission is hereby granted, free of charge, to any person obtaining a +// copy of this software and associated documentation files (the "Software"), +// to deal in the Software without restriction, including without limitation +// the rights to use, copy, modify, merge, publish, distribute, sublicense, +// and/or sell copies of the Software, and to permit persons to whom the +// Software is furnished to do so, subject to the following conditions: +// +// The above copyright notice and this permission notice shall be included in +// all copies or substantial portions of the Software. +// +// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS +// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE +// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER +// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING +// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER +// DEALINGS IN THE SOFTWARE. + +use crate::{ + codec::{ + generic::Unspecified, identity::Identity, unsigned_varint::UnsignedVarint, ProtocolCodec, + }, + config::Role, + error::Error, + multistream_select::{dialer_select_proto, listener_select_proto, Negotiated, Version}, + protocol::{Direction, Permit, ProtocolCommand, ProtocolSet}, + substream::Substream as SubstreamT, + transport::substream::Substream, + types::{protocol::ProtocolName, ConnectionId, SubstreamId}, + PeerId, +}; + +use futures::{future::BoxFuture, stream::FuturesUnordered, AsyncRead, AsyncWrite, StreamExt}; +use s2n_quic::{ + connection::{Connection, Handle}, + stream::BidirectionalStream, +}; +use tokio_util::codec::Framed; + +/// Logging target for the file. +const LOG_TARGET: &str = "litep2p::quic::connection"; + +/// QUIC connection error. +#[derive(Debug)] +enum ConnectionError { + /// Timeout + Timeout { + /// Protocol. + protocol: Option, + + /// Substream ID. + substream_id: Option, + }, + + /// Failed to negotiate connection/substream. + FailedToNegotiate { + /// Protocol. + protocol: Option, + + /// Substream ID. + substream_id: Option, + + /// Error. + error: Error, + }, +} + +/// QUIC connection. +pub(crate) struct QuicConnection { + /// Inner QUIC connection. + connection: Connection, + + /// Remote peer ID. + peer: PeerId, + + /// Connection ID. + connection_id: ConnectionId, + + /// Transport context. + protocol_set: ProtocolSet, + + /// Pending substreams. + pending_substreams: + FuturesUnordered>>, +} + +#[derive(Debug)] +pub struct NegotiatedSubstream { + /// Substream direction. + direction: Direction, + + /// Protocol name. + protocol: ProtocolName, + + /// `s2n-quic` stream. + io: BidirectionalStream, + + /// Permit. + permit: Permit, +} + +impl QuicConnection { + /// Create new [`QuiConnection`]. + pub(crate) fn new( + peer: PeerId, + protocol_set: ProtocolSet, + connection: Connection, + connection_id: ConnectionId, + ) -> Self { + Self { + peer, + connection, + connection_id, + pending_substreams: FuturesUnordered::new(), + protocol_set, + } + } + + /// Negotiate protocol. + async fn negotiate_protocol( + stream: S, + role: &Role, + protocols: Vec<&str>, + ) -> crate::Result<(Negotiated, ProtocolName)> { + tracing::trace!(target: LOG_TARGET, ?protocols, "negotiating protocols"); + + let (protocol, socket) = match role { + Role::Dialer => dialer_select_proto(stream, protocols, Version::V1).await?, + Role::Listener => listener_select_proto(stream, protocols).await?, + }; + + tracing::trace!(target: LOG_TARGET, ?protocol, "protocol negotiated"); + + Ok((socket, ProtocolName::from(protocol.to_string()))) + } + + /// Open substream for `protocol`. + pub async fn open_substream( + mut handle: Handle, + permit: Permit, + direction: Direction, + protocol: ProtocolName, + fallback_names: Vec, + ) -> crate::Result { + tracing::debug!(target: LOG_TARGET, ?protocol, ?direction, "open substream"); + + let stream = match handle.open_bidirectional_stream().await { + Ok(stream) => { + tracing::trace!( + target: LOG_TARGET, + ?protocol, + ?direction, + id = ?stream.id(), + "substream opened" + ); + stream + } + Err(error) => { + tracing::debug!( + target: LOG_TARGET, + ?direction, + ?error, + "failed to open substream" + ); + return Err(Error::Unknown); + } + }; + + // TODO: https://github.com/paritytech/litep2p/issues/346 protocols don't change after + // they've been initialized so this should be done only once. + let protocols = std::iter::once(&*protocol) + .chain(fallback_names.iter().map(|protocol| &**protocol)) + .collect(); + + let (io, protocol) = Self::negotiate_protocol(stream, &Role::Dialer, protocols).await?; + + Ok(NegotiatedSubstream { + io: io.inner(), + direction, + permit, + protocol, + }) + } + + /// Accept substream. + pub async fn accept_substream( + stream: BidirectionalStream, + permit: Permit, + substream_id: SubstreamId, + protocols: Vec, + ) -> crate::Result { + tracing::trace!( + target: LOG_TARGET, + ?substream_id, + quic_id = ?stream.id(), + "accept inbound substream" + ); + + let protocols = protocols.iter().map(|protocol| &**protocol).collect::>(); + let (io, protocol) = Self::negotiate_protocol(stream, &Role::Listener, protocols).await?; + + tracing::trace!( + target: LOG_TARGET, + ?substream_id, + ?protocol, + "substream accepted and negotiated" + ); + + Ok(NegotiatedSubstream { + io: io.inner(), + direction: Direction::Inbound, + protocol, + permit, + }) + } + + /// Start [`QuicConnection`] event loop. + pub(crate) async fn start(mut self) -> crate::Result<()> { + tracing::debug!(target: LOG_TARGET, "starting quic connection handler"); + + loop { + tokio::select! { + substream = self.connection.accept_bidirectional_stream() => match substream { + Ok(Some(stream)) => { + let substream = self.protocol_set.next_substream_id(); + let protocols = self.protocol_set.protocols(); + let permit = self.protocol_set.try_get_permit().ok_or(Error::ConnectionClosed)?; + + self.pending_substreams.push(Box::pin(async move { + match tokio::time::timeout( + std::time::Duration::from_secs(5), // TODO: https://github.com/paritytech/litep2p/issues/348 make this configurable + Self::accept_substream(stream, permit, substream, protocols), + ) + .await + { + Ok(Ok(substream)) => Ok(substream), + Ok(Err(error)) => Err(ConnectionError::FailedToNegotiate { + protocol: None, + substream_id: None, + error, + }), + Err(_) => Err(ConnectionError::Timeout { + protocol: None, + substream_id: None + }), + } + })); + } + Ok(None) => { + tracing::debug!(target: LOG_TARGET, peer = ?self.peer, "connection closed"); + self.protocol_set.report_connection_closed(self.peer, self.connection_id).await?; + + return Ok(()) + } + Err(error) => { + tracing::debug!( + target: LOG_TARGET, + peer = ?self.peer, + ?error, + "connection closed with error" + ); + self.protocol_set.report_connection_closed(self.peer, self.connection_id).await?; + + return Ok(()) + } + }, + substream = self.pending_substreams.select_next_some(), if !self.pending_substreams.is_empty() => { + match substream { + Err(error) => { + tracing::debug!( + target: LOG_TARGET, + ?error, + "failed to accept/open substream", + ); + + let (protocol, substream_id, error) = match error { + ConnectionError::Timeout { protocol, substream_id } => { + (protocol, substream_id, Error::Timeout) + } + ConnectionError::FailedToNegotiate { protocol, substream_id, error } => { + (protocol, substream_id, error) + } + }; + + if let (Some(protocol), Some(substream_id)) = (protocol, substream_id) { + if let Err(error) = self.protocol_set + .report_substream_open_failure(protocol, substream_id, error) + .await + { + tracing::error!( + target: LOG_TARGET, + ?error, + "failed to register opened substream to protocol" + ); + } + } + } + Ok(substream) => { + let protocol = substream.protocol.clone(); + let direction = substream.direction; + let substream = Substream::new(substream.io, substream.permit); + let substream: Box = match self.protocol_set.protocol_codec(&protocol) { + ProtocolCodec::Identity(payload_size) => { + Box::new(Framed::new(substream, Identity::new(payload_size))) + } + ProtocolCodec::UnsignedVarint(max_size) => { + Box::new(Framed::new(substream, UnsignedVarint::new(max_size))) + } + ProtocolCodec::Unspecified => { + Box::new(Framed::new(substream, Generic::new())) + } + }; + + if let Err(error) = self.protocol_set + .report_substream_open(self.peer, protocol, direction, substream) + .await + { + tracing::error!( + target: LOG_TARGET, + ?error, + "failed to register opened substream to protocol" + ); + } + } + } + } + protocol = self.protocol_set.next_event() => match protocol { + Some(ProtocolCommand::OpenSubstream { protocol, fallback_names, substream_id, permit, .. }) => { + let handle = self.connection.handle(); + + tracing::trace!( + target: LOG_TARGET, + ?protocol, + ?fallback_names, + ?substream_id, + "open substream" + ); + + self.pending_substreams.push(Box::pin(async move { + match tokio::time::timeout( + std::time::Duration::from_secs(5), // TODO: https://github.com/paritytech/litep2p/issues/348 make this configurable + Self::open_substream( + handle, + permit, + Direction::Outbound(substream_id), + protocol.clone(), + fallback_names + ), + ) + .await + { + Ok(Ok(substream)) => Ok(substream), + Ok(Err(error)) => Err(ConnectionError::FailedToNegotiate { + protocol: Some(protocol), + substream_id: Some(substream_id), + error, + }), + Err(_) => Err(ConnectionError::Timeout { + protocol: Some(protocol), + substream_id: Some(substream_id) + }), + } + })); + } + None => { + tracing::debug!(target: LOG_TARGET, "protocols have exited, shutting down connection"); + return self.protocol_set.report_connection_closed(self.peer, self.connection_id).await + } + } + } + } + } +} + +#[cfg(test)] +mod tests { + use super::*; + use crate::{ + crypto::{ + ed25519::Keypair, + tls::{certificate::generate, TlsProvider}, + PublicKey, + }, + protocol::{Transport, TransportEvent}, + transport::manager::{SupportedTransport, TransportManager, TransportManagerEvent}, + }; + use multiaddr::Multiaddr; + use s2n_quic::{client::Connect, Client, Server}; + use tokio::sync::mpsc::{channel, Receiver}; + + // context for testing + struct QuicContext { + manager: TransportManager, + peer: PeerId, + server: Server, + client: Client, + rx: Receiver, + connect: Connect, + } + + // prepare quic context for testing + fn prepare_quic_context() -> QuicContext { + let keypair = Keypair::generate(); + let (certificate, key) = generate(&keypair).unwrap(); + let (tx, rx) = channel(1); + let peer = PeerId::from_public_key(&PublicKey::Ed25519(keypair.public())); + + let provider = TlsProvider::new(key, certificate, None, Some(tx.clone())); + let server = Server::builder() + .with_tls(provider) + .expect("TLS provider to be enabled successfully") + .with_io("127.0.0.1:0") + .unwrap() + .start() + .unwrap(); + let listen_address = server.local_addr().unwrap(); + + let keypair = Keypair::generate(); + let (certificate, key) = generate(&keypair).unwrap(); + let provider = TlsProvider::new(key, certificate, Some(peer), None); + + let client = Client::builder() + .with_tls(provider) + .expect("TLS provider to be enabled successfully") + .with_io("0.0.0.0:0") + .unwrap() + .start() + .unwrap(); + + let connect = Connect::new(listen_address).with_server_name("localhost"); + let (manager, _handle) = TransportManager::new(keypair.clone()); + + QuicContext { + manager, + peer, + server, + client, + connect, + rx, + } + } + + #[tokio::test] + async fn connection_closed() { + let QuicContext { + mut manager, + mut server, + peer, + client, + connect, + rx: _rx, + } = prepare_quic_context(); + + let res = tokio::join!(server.accept(), client.connect(connect)); + let (Some(connection1), Ok(connection2)) = res else { + panic!("failed to establish connection"); + }; + + let mut service1 = manager.register_protocol( + ProtocolName::from("/notif/1"), + Vec::new(), + ProtocolCodec::UnsignedVarint(None), + ); + let mut service2 = manager.register_protocol( + ProtocolName::from("/notif/2"), + Vec::new(), + ProtocolCodec::UnsignedVarint(None), + ); + let transport_handle = manager.register_transport(SupportedTransport::Quic); + let mut protocol_set = transport_handle.protocol_set(); + protocol_set + .report_connection_established(ConnectionId::from(0usize), peer, Multiaddr::empty()) + .await + .unwrap(); + + // ignore connection established events + let _ = service1.next_event().await.unwrap(); + let _ = service2.next_event().await.unwrap(); + let _ = manager.next().await.unwrap(); + + tokio::spawn(async move { + let _ = + QuicConnection::new(peer, protocol_set, connection1, ConnectionId::from(0usize)) + .start() + .await; + }); + + // drop connection and verify that both protocols are notified of it + drop(connection2); + + let ( + Some(TransportEvent::ConnectionClosed { .. }), + Some(TransportEvent::ConnectionClosed { .. }), + ) = tokio::join!(service1.next_event(), service2.next_event()) + else { + panic!("invalid event received"); + }; + + // verify that the `TransportManager` is also notified about the closed connection + let Some(TransportManagerEvent::ConnectionClosed { .. }) = manager.next().await else { + panic!("invalid event received"); + }; + } + + #[tokio::test] + async fn outbound_substream_timeouts() { + let QuicContext { + mut manager, + mut server, + peer, + client, + connect, + rx: _rx, + } = prepare_quic_context(); + + let res = tokio::join!(server.accept(), client.connect(connect)); + let (Some(connection1), Ok(_connection2)) = res else { + panic!("failed to establish connection"); + }; + + let mut service1 = manager.register_protocol( + ProtocolName::from("/notif/1"), + Vec::new(), + ProtocolCodec::UnsignedVarint(None), + ); + let mut service2 = manager.register_protocol( + ProtocolName::from("/notif/2"), + Vec::new(), + ProtocolCodec::UnsignedVarint(None), + ); + let transport_handle = manager.register_transport(SupportedTransport::Quic); + let mut protocol_set = transport_handle.protocol_set(); + protocol_set + .report_connection_established(ConnectionId::from(0usize), peer, Multiaddr::empty()) + .await + .unwrap(); + + // ignore connection established events + let _ = service1.next_event().await.unwrap(); + let _ = service2.next_event().await.unwrap(); + let _ = manager.next().await.unwrap(); + + tokio::spawn(async move { + let _ = + QuicConnection::new(peer, protocol_set, connection1, ConnectionId::from(0usize)) + .start() + .await; + }); + + let _ = service1.open_substream(peer).await.unwrap(); + + let Some(TransportEvent::SubstreamOpenFailure { .. }) = service1.next_event().await else { + panic!("invalid event received"); + }; + } + + #[tokio::test] + async fn outbound_substream_protocol_not_supported() { + let _ = tracing_subscriber::fmt() + .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) + .try_init(); + + let QuicContext { + mut manager, + mut server, + peer, + client, + connect, + rx: _rx, + } = prepare_quic_context(); + + let res = tokio::join!(server.accept(), client.connect(connect)); + let (Some(connection1), Ok(mut connection2)) = res else { + panic!("failed to establish connection"); + }; + + let mut service1 = manager.register_protocol( + ProtocolName::from("/notif/1"), + Vec::new(), + ProtocolCodec::UnsignedVarint(None), + ); + let mut service2 = manager.register_protocol( + ProtocolName::from("/notif/2"), + Vec::new(), + ProtocolCodec::UnsignedVarint(None), + ); + let transport_handle = manager.register_transport(SupportedTransport::Quic); + let mut protocol_set = transport_handle.protocol_set(); + protocol_set + .report_connection_established(ConnectionId::from(0usize), peer, Multiaddr::empty()) + .await + .unwrap(); + + // ignore connection established events + let _ = service1.next_event().await.unwrap(); + let _ = service2.next_event().await.unwrap(); + let _ = manager.next().await.unwrap(); + + tokio::spawn(async move { + let _ = + QuicConnection::new(peer, protocol_set, connection1, ConnectionId::from(0usize)) + .start() + .await; + }); + + let _ = service1.open_substream(peer).await.unwrap(); + + let stream = connection2.accept_bidirectional_stream().await.unwrap().unwrap(); + + assert!( + listener_select_proto(stream, vec!["/unsupported/1", "/unsupported/2"]) + .await + .is_err() + ); + + let Some(TransportEvent::SubstreamOpenFailure { .. }) = service1.next_event().await else { + panic!("invalid event received"); + }; + } + + #[tokio::test] + async fn connection_closed_while_negotiating_protocol() { + let _ = tracing_subscriber::fmt() + .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) + .try_init(); + + let QuicContext { + mut manager, + mut server, + peer, + client, + connect, + rx: _rx, + } = prepare_quic_context(); + + let res = tokio::join!(server.accept(), client.connect(connect)); + let (Some(connection1), Ok(mut connection2)) = res else { + panic!("failed to establish connection"); + }; + + let mut service1 = manager.register_protocol( + ProtocolName::from("/notif/1"), + Vec::new(), + ProtocolCodec::UnsignedVarint(None), + ); + let mut service2 = manager.register_protocol( + ProtocolName::from("/notif/2"), + Vec::new(), + ProtocolCodec::UnsignedVarint(None), + ); + let transport_handle = manager.register_transport(SupportedTransport::Quic); + let mut protocol_set = transport_handle.protocol_set(); + protocol_set + .report_connection_established(ConnectionId::from(0usize), peer, Multiaddr::empty()) + .await + .unwrap(); + + // ignore connection established events + let _ = service1.next_event().await.unwrap(); + let _ = service2.next_event().await.unwrap(); + let _ = manager.next().await.unwrap(); + + tokio::spawn(async move { + let _ = + QuicConnection::new(peer, protocol_set, connection1, ConnectionId::from(0usize)) + .start() + .await; + }); + + let _ = service1.open_substream(peer).await.unwrap(); + let stream = connection2.accept_bidirectional_stream().await.unwrap().unwrap(); + + drop(stream); + drop(connection2); + + let Some(TransportEvent::SubstreamOpenFailure { .. }) = service1.next_event().await else { + panic!("invalid event received"); + }; + } + + #[tokio::test] + async fn outbound_substream_opened_and_negotiated() { + let _ = tracing_subscriber::fmt() + .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) + .try_init(); + + let QuicContext { + mut manager, + mut server, + peer, + client, + connect, + rx: _rx, + } = prepare_quic_context(); + + let res = tokio::join!(server.accept(), client.connect(connect)); + let (Some(connection1), Ok(mut connection2)) = res else { + panic!("failed to establish connection"); + }; + + let mut service1 = manager.register_protocol( + ProtocolName::from("/notif/1"), + Vec::new(), + ProtocolCodec::UnsignedVarint(None), + ); + let mut service2 = manager.register_protocol( + ProtocolName::from("/notif/2"), + Vec::new(), + ProtocolCodec::UnsignedVarint(None), + ); + let transport_handle = manager.register_transport(SupportedTransport::Quic); + let mut protocol_set = transport_handle.protocol_set(); + protocol_set + .report_connection_established(ConnectionId::from(0usize), peer, Multiaddr::empty()) + .await + .unwrap(); + + // ignore connection established events + let _ = service1.next_event().await.unwrap(); + let _ = service2.next_event().await.unwrap(); + let _ = manager.next().await.unwrap(); + + tokio::spawn(async move { + let _ = + QuicConnection::new(peer, protocol_set, connection1, ConnectionId::from(0usize)) + .start() + .await; + }); + + let _ = service1.open_substream(peer).await.unwrap(); + + let stream = connection2.accept_bidirectional_stream().await.unwrap().unwrap(); + + let (_io, _proto) = + listener_select_proto(stream, vec!["/notif/1", "/notif/2"]).await.unwrap(); + + let Some(TransportEvent::SubstreamOpened { .. }) = service1.next_event().await else { + panic!("invalid event received"); + }; + } +} diff --git a/client/litep2p/src/transport/s2n-quic/mod.rs b/client/litep2p/src/transport/s2n-quic/mod.rs new file mode 100644 index 00000000..6237ee3f --- /dev/null +++ b/client/litep2p/src/transport/s2n-quic/mod.rs @@ -0,0 +1,593 @@ +// Copyright 2023 litep2p developers +// +// Permission is hereby granted, free of charge, to any person obtaining a +// copy of this software and associated documentation files (the "Software"), +// to deal in the Software without restriction, including without limitation +// the rights to use, copy, modify, merge, publish, distribute, sublicense, +// and/or sell copies of the Software, and to permit persons to whom the +// Software is furnished to do so, subject to the following conditions: +// +// The above copyright notice and this permission notice shall be included in +// all copies or substantial portions of the Software. +// +// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS +// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE +// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER +// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING +// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER +// DEALINGS IN THE SOFTWARE. + +//! QUIC transport. + +use crate::{ + crypto::tls::{certificate::generate, TlsProvider}, + error::{AddressError, Error}, + transport::{ + manager::{TransportHandle, TransportManagerCommand}, + quic::{config::Config, connection::QuicConnection}, + Transport, + }, + types::ConnectionId, + PeerId, +}; + +use futures::{future::BoxFuture, stream::FuturesUnordered, StreamExt}; +use multiaddr::{Multiaddr, Protocol}; +use multihash::Multihash; +use s2n_quic::{ + client::Connect, + connection::{Connection, Error as ConnectionError}, + Client, Server, +}; +use tokio::sync::mpsc::{channel, Receiver, Sender}; + +use std::{ + collections::HashMap, + net::{IpAddr, Ipv4Addr, Ipv6Addr, SocketAddr}, +}; + +mod connection; + +pub mod config; + +/// Logging target for the file. +const LOG_TARGET: &str = "litep2p::quic"; + +/// Convert `SocketAddr` to `Multiaddr` +fn socket_addr_to_multi_addr(address: &SocketAddr) -> Multiaddr { + let mut multiaddr = Multiaddr::from(address.ip()); + multiaddr.push(Protocol::Udp(address.port())); + multiaddr.push(Protocol::QuicV1); + + multiaddr +} + +/// QUIC transport object. +#[derive(Debug)] +pub(crate) struct QuicTransport { + /// QUIC server. + server: Server, + + /// Transport context. + context: TransportHandle, + + /// Assigned listen address. + listen_address: SocketAddr, + + /// Listen address assigned for clients. + client_listen_address: SocketAddr, + + /// Pending dials. + pending_dials: HashMap, + + /// Pending connections. + pending_connections: FuturesUnordered< + BoxFuture<'static, (ConnectionId, PeerId, Result)>, + >, + + /// RX channel for receiving the client `PeerId`. + rx: Receiver, + + /// TX channel for send the client `PeerId` to server. + _tx: Sender, +} + +impl QuicTransport { + /// Extract socket address and `PeerId`, if found, from `address`. + fn get_socket_address(address: &Multiaddr) -> crate::Result<(SocketAddr, Option)> { + tracing::trace!(target: LOG_TARGET, ?address, "parse multi address"); + + let mut iter = address.iter(); + let socket_address = match iter.next() { + Some(Protocol::Ip6(address)) => match iter.next() { + Some(Protocol::Udp(port)) => SocketAddr::new(IpAddr::V6(address), port), + protocol => { + tracing::error!( + target: LOG_TARGET, + ?protocol, + "invalid transport protocol, expected `QuicV1`", + ); + return Err(Error::AddressError(AddressError::InvalidProtocol)); + } + }, + Some(Protocol::Ip4(address)) => match iter.next() { + Some(Protocol::Udp(port)) => SocketAddr::new(IpAddr::V4(address), port), + protocol => { + tracing::error!( + target: LOG_TARGET, + ?protocol, + "invalid transport protocol, expected `QuicV1`", + ); + return Err(Error::AddressError(AddressError::InvalidProtocol)); + } + }, + protocol => { + tracing::error!(target: LOG_TARGET, ?protocol, "invalid transport protocol"); + return Err(Error::AddressError(AddressError::InvalidProtocol)); + } + }; + + // verify that quic exists + match iter.next() { + Some(Protocol::QuicV1) => {} + _ => return Err(Error::AddressError(AddressError::InvalidProtocol)), + } + + let maybe_peer = match iter.next() { + Some(Protocol::P2p(multihash)) => Some(PeerId::from_multihash(multihash)?), + None => None, + protocol => { + tracing::error!( + target: LOG_TARGET, + ?protocol, + "invalid protocol, expected `P2p` or `None`" + ); + return Err(Error::AddressError(AddressError::InvalidProtocol)); + } + }; + + Ok((socket_address, maybe_peer)) + } + + /// Accept QUIC conenction. + async fn accept_connection(&mut self, connection: Connection) -> crate::Result<()> { + let connection_id = self.context.next_connection_id(); + let address = socket_addr_to_multi_addr( + &connection.remote_addr().expect("remote address to be known"), + ); + + let Ok(peer) = self.rx.try_recv() else { + tracing::error!(target: LOG_TARGET, "failed to receive client `PeerId` from tls verifier"); + return Ok(()); + }; + + tracing::info!(target: LOG_TARGET, ?address, ?peer, "accepted connection from remote peer"); + + // TODO: https://github.com/paritytech/litep2p/issues/349 verify that the peer can actually be accepted + let mut protocol_set = self.context.protocol_set(); + protocol_set.report_connection_established(connection_id, peer, address).await?; + + tokio::spawn(async move { + let quic_connection = + QuicConnection::new(peer, protocol_set, connection, connection_id); + + if let Err(error) = quic_connection.start().await { + tracing::debug!(target: LOG_TARGET, ?error, "quic connection exited with an error"); + } + }); + + Ok(()) + } + + /// Handle established connection. + async fn on_connection_established( + &mut self, + peer: PeerId, + connection_id: ConnectionId, + result: Result, + ) -> crate::Result<()> { + match result { + Ok(connection) => { + let address = match self.pending_dials.remove(&connection_id) { + Some(address) => address, + None => { + let address = connection + .remote_addr() + .map_err(|_| Error::AddressError(AddressError::AddressNotAvailable))?; + + Multiaddr::empty() + .with(Protocol::from(address.ip())) + .with(Protocol::Udp(address.port())) + .with(Protocol::QuicV1) + .with(Protocol::P2p( + Multihash::from_bytes(&peer.to_bytes()).unwrap(), + )) + } + }; + + let mut protocol_set = self.context.protocol_set(); + protocol_set.report_connection_established(connection_id, peer, address).await?; + + tokio::spawn(async move { + let quic_connection = + QuicConnection::new(peer, protocol_set, connection, connection_id); + if let Err(error) = quic_connection.start().await { + tracing::debug!(target: LOG_TARGET, ?error, "quic connection exited with an error"); + } + }); + + Ok(()) + } + Err(error) => match self.pending_dials.remove(&connection_id) { + Some(address) => { + let error = if std::matches!( + error, + ConnectionError::MaxHandshakeDurationExceeded { .. } + ) { + Error::Timeout + } else { + Error::TransportError(error.to_string()) + }; + + self.context.report_dial_failure(connection_id, address, error).await; + Ok(()) + } + None => { + tracing::debug!( + target: LOG_TARGET, + ?error, + "failed to establish connection" + ); + Ok(()) + } + }, + } + } + + /// Dial remote peer. + async fn on_dial_peer( + &mut self, + address: Multiaddr, + connection: ConnectionId, + ) -> crate::Result<()> { + tracing::debug!(target: LOG_TARGET, ?address, "open connection"); + + let Ok((socket_address, Some(peer))) = Self::get_socket_address(&address) else { + return Err(Error::AddressError(AddressError::PeerIdMissing)); + }; + + let (certificate, key) = generate(&self.context.keypair).unwrap(); + let provider = TlsProvider::new(key, certificate, Some(peer), None); + + let client = Client::builder() + .with_tls(provider) + .expect("TLS provider to be enabled successfully") + .with_io(self.client_listen_address)? + .start()?; + + let connect = Connect::new(socket_address).with_server_name("localhost"); + + self.pending_dials.insert(connection, address); + self.pending_connections.push(Box::pin(async move { + (connection, peer, client.connect(connect).await) + })); + + Ok(()) + } +} + +#[async_trait::async_trait] +impl Transport for QuicTransport { + type Config = Config; + + /// Create new [`QuicTransport`] object. + async fn new(context: TransportHandle, config: Self::Config) -> crate::Result + where + Self: Sized, + { + tracing::info!( + target: LOG_TARGET, + listen_address = ?config.listen_address, + "start quic transport", + ); + + let (listen_address, _) = Self::get_socket_address(&config.listen_address)?; + let (certificate, key) = generate(&context.keypair)?; + let (_tx, rx) = channel(1); + + let provider = TlsProvider::new(key, certificate, None, Some(_tx.clone())); + let server = Server::builder() + .with_tls(provider) + .expect("TLS provider to be enabled successfully") + .with_io(listen_address)? + .start()?; + + let listen_address = server.local_addr()?; + let client_listen_address = match listen_address.ip() { + std::net::IpAddr::V4(_) => SocketAddr::new(IpAddr::V4(Ipv4Addr::UNSPECIFIED), 0), + std::net::IpAddr::V6(_) => SocketAddr::new(IpAddr::V6(Ipv6Addr::UNSPECIFIED), 0), + }; + + Ok(Self { + rx, + _tx, + server, + context, + listen_address, + client_listen_address, + pending_dials: HashMap::new(), + pending_connections: FuturesUnordered::new(), + }) + } + + /// Get assigned listen address. + fn listen_address(&self) -> Multiaddr { + socket_addr_to_multi_addr(&self.listen_address) + } + + /// Start [`QuicTransport`] event loop. + async fn start(mut self) -> crate::Result<()> { + loop { + tokio::select! { + connection = self.server.accept() => match connection { + Some(connection) => if let Err(error) = self.accept_connection(connection).await { + tracing::error!(target: LOG_TARGET, ?error, "failed to accept quic connection"); + return Err(error); + }, + None => { + tracing::error!(target: LOG_TARGET, "failed to accept connection, closing quic transport"); + return Ok(()) + } + }, + connection = self.pending_connections.select_next_some(), if !self.pending_connections.is_empty() => { + let (connection_id, peer, result) = connection; + + if let Err(error) = self.on_connection_established(peer, connection_id, result).await { + tracing::debug!(target: LOG_TARGET, ?peer, ?error, "failed to handle established connection"); + } + } + command = self.context.next() => match command.ok_or(Error::EssentialTaskClosed)? { + TransportManagerCommand::Dial { address, connection } => { + if let Err(error) = self.on_dial_peer(address.clone(), connection).await { + tracing::debug!(target: LOG_TARGET, ?address, ?connection, "failed to dial peer"); + let _ = self.context.report_dial_failure(connection, address, error).await; + } + } + } + } + } + } +} + +#[cfg(test)] +mod tests { + use super::*; + use crate::{ + codec::ProtocolCodec, + crypto::{ed25519::Keypair, PublicKey}, + transport::manager::{ + ProtocolContext, SupportedTransport, TransportHandle, TransportManager, + TransportManagerCommand, TransportManagerEvent, + }, + types::protocol::ProtocolName, + }; + use tokio::sync::mpsc::channel; + + #[tokio::test] + async fn connect_and_accept_works() { + let _ = tracing_subscriber::fmt() + .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) + .try_init(); + + let keypair1 = Keypair::generate(); + let (tx1, _rx1) = channel(64); + let (event_tx1, mut event_rx1) = channel(64); + let (_command_tx1, command_rx1) = channel(64); + + let handle1 = TransportHandle { + protocol_names: Vec::new(), + next_substream_id: Default::default(), + next_connection_id: Default::default(), + tx: event_tx1, + rx: command_rx1, + keypair: keypair1.clone(), + protocols: HashMap::from_iter([( + ProtocolName::from("/notif/1"), + ProtocolContext { + tx: tx1, + codec: ProtocolCodec::Identity(32), + fallback_names: Vec::new(), + }, + )]), + }; + let transport_config1 = config::Config { + listen_address: "/ip4/127.0.0.1/udp/0/quic-v1".parse().unwrap(), + }; + + let transport1 = QuicTransport::new(handle1, transport_config1).await.unwrap(); + + let _peer1: PeerId = PeerId::from_public_key(&PublicKey::Ed25519(keypair1.public())); + let listen_address = Transport::listen_address(&transport1).to_string(); + let listen_address: Multiaddr = + format!("{}/p2p/{}", listen_address, _peer1.to_string()).parse().unwrap(); + tokio::spawn(transport1.start()); + + let keypair2 = Keypair::generate(); + let (tx2, _rx2) = channel(64); + let (event_tx2, mut event_rx2) = channel(64); + let (command_tx2, command_rx2) = channel(64); + + let handle2 = TransportHandle { + protocol_names: Vec::new(), + next_substream_id: Default::default(), + next_connection_id: Default::default(), + tx: event_tx2, + rx: command_rx2, + keypair: keypair2.clone(), + protocols: HashMap::from_iter([( + ProtocolName::from("/notif/1"), + ProtocolContext { + tx: tx2, + codec: ProtocolCodec::Identity(32), + fallback_names: Vec::new(), + }, + )]), + }; + let transport_config2 = config::Config { + listen_address: "/ip4/127.0.0.1/udp/0/quic-v1".parse().unwrap(), + }; + + let transport2 = QuicTransport::new(handle2, transport_config2).await.unwrap(); + tokio::spawn(transport2.start()); + + command_tx2 + .send(TransportManagerCommand::Dial { + address: listen_address, + connection: ConnectionId::new(), + }) + .await + .unwrap(); + + let (res1, res2) = tokio::join!(event_rx1.recv(), event_rx2.recv()); + + assert!(std::matches!( + res1, + Some(TransportManagerEvent::ConnectionEstablished { .. }) + )); + assert!(std::matches!( + res2, + Some(TransportManagerEvent::ConnectionEstablished { .. }) + )); + } + + #[tokio::test] + async fn dial_peer_id_missing() { + let (mut manager, _handle) = TransportManager::new(Keypair::generate()); + let handle = manager.register_transport(SupportedTransport::Quic); + let mut transport = QuicTransport::new( + handle, + Config { + listen_address: "/ip4/127.0.0.1/udp/0/quic-v1".parse().unwrap(), + }, + ) + .await + .unwrap(); + + let address = Multiaddr::empty() + .with(Protocol::Ip4(std::net::Ipv4Addr::new(127, 0, 0, 1))) + .with(Protocol::Udp(8888)); + + match transport.on_dial_peer(address, ConnectionId::from(0usize)).await { + Err(Error::AddressError(AddressError::PeerIdMissing)) => {} + _ => panic!("invalid result for `on_dial_peer()`"), + } + } + + #[tokio::test] + async fn dial_failure() { + let _ = tracing_subscriber::fmt() + .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) + .try_init(); + + let (mut manager, _handle) = TransportManager::new(Keypair::generate()); + let handle = manager.register_transport(SupportedTransport::Quic); + let mut transport = QuicTransport::new( + handle, + Config { + listen_address: "/ip4/127.0.0.1/udp/0/quic-v1".parse().unwrap(), + }, + ) + .await + .unwrap(); + + let peer = PeerId::random(); + let address = Multiaddr::empty() + .with(Protocol::from(std::net::Ipv4Addr::new(255, 254, 253, 252))) + .with(Protocol::Udp(8888)) + .with(Protocol::QuicV1) + .with(Protocol::P2p( + Multihash::from_bytes(&peer.to_bytes()).unwrap(), + )); + manager.dial_address(address.clone()).await.unwrap(); + + assert!(transport.pending_dials.is_empty()); + + match transport.on_dial_peer(address, ConnectionId::from(0usize)).await { + Ok(()) => {} + _ => panic!("invalid result for `on_dial_peer()`"), + } + + assert!(!transport.pending_dials.is_empty()); + + tokio::spawn(transport.start()); + + std::matches!( + manager.next().await, + Some(TransportManagerEvent::DialFailure { .. }) + ); + } + + #[tokio::test] + async fn pending_dial_is_cleaned() { + let _ = tracing_subscriber::fmt() + .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) + .try_init(); + + let keypair = Keypair::generate(); + let (mut manager, _handle) = TransportManager::new(keypair.clone()); + let handle = manager.register_transport(SupportedTransport::Quic); + let mut transport = QuicTransport::new( + handle, + Config { + listen_address: "/ip4/127.0.0.1/udp/0/quic-v1".parse().unwrap(), + }, + ) + .await + .unwrap(); + + let peer = PeerId::random(); + let address = Multiaddr::empty() + .with(Protocol::from(std::net::Ipv4Addr::new(255, 254, 253, 252))) + .with(Protocol::Udp(8888)) + .with(Protocol::QuicV1) + .with(Protocol::P2p( + Multihash::from_bytes(&peer.to_bytes()).unwrap(), + )); + + assert!(transport.pending_dials.is_empty()); + + match transport.on_dial_peer(address.clone(), ConnectionId::from(0usize)).await { + Ok(()) => {} + _ => panic!("invalid result for `on_dial_peer()`"), + } + + assert!(!transport.pending_dials.is_empty()); + + let Ok((socket_address, Some(peer))) = QuicTransport::get_socket_address(&address) else { + panic!("invalid address"); + }; + + let (certificate, key) = generate(&keypair).unwrap(); + let provider = TlsProvider::new(key, certificate, Some(peer), None); + + let client = Client::builder() + .with_tls(provider) + .expect("TLS provider to be enabled successfully") + .with_io("0.0.0.0:0") + .unwrap() + .start() + .unwrap(); + let connect = Connect::new(socket_address).with_server_name("localhost"); + + let _ = transport + .on_connection_established( + peer, + ConnectionId::from(0usize), + client.connect(connect).await, + ) + .await; + + assert!(transport.pending_dials.is_empty()); + } +} diff --git a/client/litep2p/src/transport/tcp/config.rs b/client/litep2p/src/transport/tcp/config.rs new file mode 100644 index 00000000..3fe11409 --- /dev/null +++ b/client/litep2p/src/transport/tcp/config.rs @@ -0,0 +1,109 @@ +// Copyright 2023 litep2p developers +// +// Permission is hereby granted, free of charge, to any person obtaining a +// copy of this software and associated documentation files (the "Software"), +// to deal in the Software without restriction, including without limitation +// the rights to use, copy, modify, merge, publish, distribute, sublicense, +// and/or sell copies of the Software, and to permit persons to whom the +// Software is furnished to do so, subject to the following conditions: +// +// The above copyright notice and this permission notice shall be included in +// all copies or substantial portions of the Software. +// +// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS +// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE +// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER +// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING +// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER +// DEALINGS IN THE SOFTWARE. + +//! TCP transport configuration. + +use crate::{ + crypto::noise::{MAX_READ_AHEAD_FACTOR, MAX_WRITE_BUFFER_SIZE}, + transport::{CONNECTION_OPEN_TIMEOUT, MAX_PARALLEL_DIALS, SUBSTREAM_OPEN_TIMEOUT}, +}; + +/// TCP transport configuration. +#[derive(Debug, Clone)] +pub struct Config { + /// Listen address for the transport. + /// + /// Default listen addresses are ["/ip4/0.0.0.0/tcp/0", "/ip6/::/tcp/0"]. + pub listen_addresses: Vec, + + /// Whether to set `SO_REUSEPORT` and bind a socket to the listen address port for outbound + /// connections. + /// + /// Note that `SO_REUSEADDR` is always set on listening sockets. + /// + /// Defaults to `true`. + pub reuse_port: bool, + + /// Enable `TCP_NODELAY`. + /// + /// Defaults to `false`. + pub nodelay: bool, + + /// Yamux configuration. + pub yamux_config: crate::yamux::Config, + + /// Noise read-ahead frame count. + /// + /// Specifies how many Noise frames are read per call to the underlying socket. + /// + /// By default this is configured to `5` so each call to the underlying socket can read up + /// to `5` Noise frame per call. Fewer frames may be read if there isn't enough data in the + /// socket. Each Noise frame is `65 KB` so the default setting allocates `65 KB * 5 = 325 KB` + /// per connection. + pub noise_read_ahead_frame_count: usize, + + /// Noise write buffer size. + /// + /// Specifes how many Noise frames are tried to be coalesced into a single system call. + /// By default the value is set to `2` which means that the `NoiseSocket` will allocate + /// `130 KB` for each outgoing connection. + /// + /// The write buffer size is separate from the read-ahead frame count so by default + /// the Noise code will allocate `2 * 65 KB + 5 * 65 KB = 455 KB` per connection. + pub noise_write_buffer_size: usize, + + /// Connection open timeout. + /// + /// How long should litep2p wait for a connection to be opened before the host + /// is deemed unreachable. + pub connection_open_timeout: std::time::Duration, + + /// Substream open timeout. + /// + /// How long should litep2p wait for a substream to be opened before considering + /// the substream rejected. + pub substream_open_timeout: std::time::Duration, + + /// Maximum number of parallel dial attempts for a single peer. + /// + /// **Note:** This value is overridden by the top-level + /// [`ConfigBuilder::with_max_parallel_dials`](crate::config::ConfigBuilder::with_max_parallel_dials) + /// when building `Litep2p`. + pub max_parallel_dials: usize, +} + +impl Default for Config { + fn default() -> Self { + Self { + listen_addresses: vec![ + "/ip4/0.0.0.0/tcp/0".parse().expect("valid address"), + "/ip6/::/tcp/0".parse().expect("valid address"), + ], + reuse_port: true, + nodelay: false, + yamux_config: Default::default(), + noise_read_ahead_frame_count: MAX_READ_AHEAD_FACTOR, + noise_write_buffer_size: MAX_WRITE_BUFFER_SIZE, + connection_open_timeout: CONNECTION_OPEN_TIMEOUT, + substream_open_timeout: SUBSTREAM_OPEN_TIMEOUT, + max_parallel_dials: MAX_PARALLEL_DIALS, + } + } +} diff --git a/client/litep2p/src/transport/tcp/connection.rs b/client/litep2p/src/transport/tcp/connection.rs new file mode 100644 index 00000000..7f296952 --- /dev/null +++ b/client/litep2p/src/transport/tcp/connection.rs @@ -0,0 +1,1456 @@ +// Copyright 2023 litep2p developers +// +// Permission is hereby granted, free of charge, to any person obtaining a +// copy of this software and associated documentation files (the "Software"), +// to deal in the Software without restriction, including without limitation +// the rights to use, copy, modify, merge, publish, distribute, sublicense, +// and/or sell copies of the Software, and to permit persons to whom the +// Software is furnished to do so, subject to the following conditions: +// +// The above copyright notice and this permission notice shall be included in +// all copies or substantial portions of the Software. +// +// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS +// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE +// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER +// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING +// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER +// DEALINGS IN THE SOFTWARE. + +use crate::{ + config::Role, + crypto::{ + ed25519::Keypair, + noise::{self, NoiseSocket}, + }, + error::{Error, NegotiationError, SubstreamError}, + multistream_select::{dialer_select_proto, listener_select_proto, Negotiated, Version}, + protocol::{Direction, Permit, ProtocolCommand, ProtocolSet, SubstreamKeepAlive}, + substream, + transport::{ + common::listener::{AddressType, DnsType}, + tcp::substream::Substream, + Endpoint, + }, + types::{protocol::ProtocolName, ConnectionId, SubstreamId}, + BandwidthSink, PeerId, +}; + +use futures::{ + future::BoxFuture, + stream::{FuturesUnordered, StreamExt}, + AsyncRead, AsyncWrite, +}; +use multiaddr::{Multiaddr, Protocol}; +use tokio::net::TcpStream; +use tokio_util::compat::{ + Compat, FuturesAsyncReadCompatExt, TokioAsyncReadCompatExt, TokioAsyncWriteCompatExt, +}; + +use std::{ + borrow::Cow, + collections::HashMap, + fmt, + net::SocketAddr, + sync::{ + atomic::{AtomicUsize, Ordering}, + Arc, + }, + time::Duration, +}; + +/// Logging target for the file. +const LOG_TARGET: &str = "litep2p::tcp::connection"; + +#[derive(Debug)] +pub struct NegotiatedSubstream { + /// Substream direction. + direction: Direction, + + /// Substream ID. + substream_id: SubstreamId, + + /// Protocol name. + protocol: ProtocolName, + + /// Yamux substream. + io: crate::yamux::Stream, + + /// Permit held until the negotiated substream is reported back to + /// [`TransportService`](crate::protocol::TransportService) and connection upgraded. + permit: Permit, + + /// Whether to store the permit as long as substream exists. + keep_alive: SubstreamKeepAlive, +} + +/// TCP connection error. +#[derive(Debug)] +enum ConnectionError { + /// Timeout + Timeout { + /// Protocol. + protocol: Option, + + /// Substream ID. + substream_id: Option, + }, + + /// Failed to negotiate connection/substream. + FailedToNegotiate { + /// Protocol. + protocol: Option, + + /// Substream ID. + substream_id: Option, + + /// Error. + error: SubstreamError, + }, +} + +/// Connection context for an opened connection that hasn't yet started its event loop. +pub struct NegotiatedConnection { + /// Yamux connection. + connection: crate::yamux::ControlledConnection>>, + + /// Yamux control. + control: crate::yamux::Control, + + /// Remote peer ID. + peer: PeerId, + + /// Endpoint. + endpoint: Endpoint, + + /// Substream open timeout. + substream_open_timeout: Duration, +} + +impl std::fmt::Debug for NegotiatedConnection { + fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { + f.debug_struct("NegotiatedConnection") + .field("peer", &self.peer) + .field("endpoint", &self.endpoint) + .finish() + } +} + +impl NegotiatedConnection { + /// Get `ConnectionId` of the negotiated connection. + pub fn connection_id(&self) -> ConnectionId { + self.endpoint.connection_id() + } + + /// Get `PeerId` of the negotiated connection. + pub fn peer(&self) -> PeerId { + self.peer + } + + /// Get `Endpoint` of the negotiated connection. + pub fn endpoint(&self) -> Endpoint { + self.endpoint.clone() + } +} + +/// TCP connection. +pub struct TcpConnection { + /// Protocol context. + protocol_set: ProtocolSet, + + /// Yamux connection. + connection: crate::yamux::ControlledConnection>>, + + /// Yamux control. + control: crate::yamux::Control, + + /// Remote peer ID. + peer: PeerId, + + /// Endpoint. + endpoint: Endpoint, + + /// Substream open timeout. + substream_open_timeout: Duration, + + /// Next substream ID. + next_substream_id: Arc, + + // Bandwidth sink. + bandwidth_sink: BandwidthSink, + + /// Pending substreams. + pending_substreams: + FuturesUnordered>>, +} + +impl fmt::Debug for TcpConnection { + fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { + f.debug_struct("TcpConnection") + .field("peer", &self.peer) + .field("next_substream_id", &self.next_substream_id) + .finish() + } +} + +impl TcpConnection { + /// Create new [`TcpConnection`] from [`NegotiatedConnection`]. + pub(super) fn new( + context: NegotiatedConnection, + protocol_set: ProtocolSet, + bandwidth_sink: BandwidthSink, + next_substream_id: Arc, + ) -> Self { + let NegotiatedConnection { + connection, + control, + peer, + endpoint, + substream_open_timeout, + } = context; + + Self { + protocol_set, + connection, + control, + peer, + endpoint, + bandwidth_sink, + next_substream_id, + pending_substreams: FuturesUnordered::new(), + substream_open_timeout, + } + } + + /// Open connection to remote peer at `address`. + // TODO: https://github.com/paritytech/litep2p/issues/347 this function can be removed + pub(super) async fn open_connection( + connection_id: ConnectionId, + keypair: Keypair, + stream: TcpStream, + address: AddressType, + peer: Option, + yamux_config: crate::yamux::Config, + max_read_ahead_factor: usize, + max_write_buffer_size: usize, + connection_open_timeout: Duration, + substream_open_timeout: Duration, + ) -> Result { + tracing::debug!( + target: LOG_TARGET, + ?address, + ?peer, + "open connection to remote peer", + ); + + match tokio::time::timeout(connection_open_timeout, async move { + Self::negotiate_connection( + stream, + peer, + connection_id, + keypair, + Role::Dialer, + address, + yamux_config, + max_read_ahead_factor, + max_write_buffer_size, + substream_open_timeout, + ) + .await + }) + .await + { + Err(_) => { + tracing::trace!(target: LOG_TARGET, ?connection_id, "connection timed out during negotiation"); + Err(NegotiationError::Timeout) + } + Ok(result) => result, + } + } + + /// Open substream for `protocol`. + pub(super) async fn open_substream( + mut control: crate::yamux::Control, + substream_id: SubstreamId, + permit: Permit, + keep_alive: SubstreamKeepAlive, + protocol: ProtocolName, + fallback_names: Vec, + open_timeout: Duration, + ) -> Result { + tracing::debug!(target: LOG_TARGET, ?protocol, ?substream_id, "open substream"); + + let stream = match control.open_stream().await { + Ok(stream) => { + tracing::trace!(target: LOG_TARGET, ?substream_id, "substream opened"); + stream + } + Err(error) => { + tracing::debug!( + target: LOG_TARGET, + ?substream_id, + ?error, + "failed to open substream" + ); + return Err(SubstreamError::YamuxError( + error, + Direction::Outbound(substream_id), + )); + } + }; + + // TODO: https://github.com/paritytech/litep2p/issues/346 protocols don't change after + // they've been initialized so this should be done only once + let protocols = std::iter::once(&*protocol) + .chain(fallback_names.iter().map(|protocol| &**protocol)) + .collect(); + + let (io, protocol) = + Self::negotiate_protocol(stream, &Role::Dialer, protocols, open_timeout).await?; + + Ok(NegotiatedSubstream { + io: io.inner(), + substream_id, + direction: Direction::Outbound(substream_id), + protocol, + permit, + keep_alive, + }) + } + + /// Accept a new connection. + pub(super) async fn accept_connection( + stream: TcpStream, + connection_id: ConnectionId, + keypair: Keypair, + address: SocketAddr, + yamux_config: crate::yamux::Config, + max_read_ahead_factor: usize, + max_write_buffer_size: usize, + connection_open_timeout: Duration, + substream_open_timeout: Duration, + ) -> Result { + tracing::debug!(target: LOG_TARGET, ?address, "accept connection"); + + match tokio::time::timeout(connection_open_timeout, async move { + Self::negotiate_connection( + stream, + None, + connection_id, + keypair, + Role::Listener, + AddressType::Socket(address), + yamux_config, + max_read_ahead_factor, + max_write_buffer_size, + substream_open_timeout, + ) + .await + }) + .await + { + Err(_) => Err(NegotiationError::Timeout), + Ok(result) => result, + } + } + + /// Accept substream. + pub(super) async fn accept_substream( + stream: crate::yamux::Stream, + permit: Permit, + substream_id: SubstreamId, + protocols: HashMap, + open_timeout: Duration, + ) -> Result { + tracing::trace!( + target: LOG_TARGET, + ?substream_id, + "accept inbound substream", + ); + + let protocol_names = protocols.keys().map(|protocol| &**protocol).collect::>(); + let (io, protocol) = + Self::negotiate_protocol(stream, &Role::Listener, protocol_names, open_timeout).await?; + let keep_alive = *protocols.get(&protocol).expect("protocol to be one of the keys"); + + tracing::trace!( + target: LOG_TARGET, + ?substream_id, + "substream accepted and negotiated", + ); + + Ok(NegotiatedSubstream { + io: io.inner(), + substream_id, + direction: Direction::Inbound, + protocol, + permit, + keep_alive, + }) + } + + /// Negotiate protocol. + async fn negotiate_protocol( + stream: S, + role: &Role, + protocols: Vec<&str>, + substream_open_timeout: Duration, + ) -> Result<(Negotiated, ProtocolName), NegotiationError> { + tracing::trace!(target: LOG_TARGET, ?protocols, "negotiating protocols"); + + match tokio::time::timeout(substream_open_timeout, async move { + match role { + Role::Dialer => dialer_select_proto(stream, protocols, Version::V1).await, + Role::Listener => listener_select_proto(stream, protocols).await, + } + }) + .await + { + Err(_) => Err(NegotiationError::Timeout), + Ok(Err(error)) => Err(NegotiationError::MultistreamSelectError(error)), + Ok(Ok((protocol, socket))) => { + tracing::trace!(target: LOG_TARGET, ?protocol, "protocol negotiated"); + + Ok((socket, ProtocolName::from(protocol.to_string()))) + } + } + } + + /// Negotiate noise + yamux for the connection. + pub(super) async fn negotiate_connection( + stream: TcpStream, + dialed_peer: Option, + connection_id: ConnectionId, + keypair: Keypair, + role: Role, + address: AddressType, + yamux_config: crate::yamux::Config, + max_read_ahead_factor: usize, + max_write_buffer_size: usize, + substream_open_timeout: Duration, + ) -> Result { + tracing::trace!( + target: LOG_TARGET, + ?role, + "negotiate connection", + ); + + let stream = TokioAsyncReadCompatExt::compat(stream).into_inner(); + let stream = TokioAsyncWriteCompatExt::compat_write(stream); + + // negotiate `noise` + let (stream, _) = + Self::negotiate_protocol(stream, &role, vec!["/noise"], substream_open_timeout).await?; + + tracing::trace!( + target: LOG_TARGET, + "`multistream-select` and `noise` negotiated", + ); + + // perform noise handshake + let (stream, peer) = noise::handshake( + stream.inner(), + &keypair, + role, + max_read_ahead_factor, + max_write_buffer_size, + substream_open_timeout, + noise::HandshakeTransport::Tcp, + ) + .await?; + + if let Some(dialed_peer) = dialed_peer { + if dialed_peer != peer { + tracing::debug!(target: LOG_TARGET, ?dialed_peer, ?peer, "peer id mismatch"); + return Err(NegotiationError::PeerIdMismatch(dialed_peer, peer)); + } + } + + tracing::trace!(target: LOG_TARGET, "noise handshake done"); + let stream: NoiseSocket> = stream; + + // negotiate `yamux` + let (stream, _) = + Self::negotiate_protocol(stream, &role, vec!["/yamux/1.0.0"], substream_open_timeout) + .await?; + tracing::trace!(target: LOG_TARGET, "`yamux` negotiated"); + + let connection = crate::yamux::Connection::new(stream.inner(), yamux_config, role.into()); + let (control, connection) = crate::yamux::Control::new(connection); + + let address = match address { + AddressType::Socket(address) => Multiaddr::empty() + .with(Protocol::from(address.ip())) + .with(Protocol::Tcp(address.port())), + AddressType::Dns { + address, + port, + dns_type, + } => match dns_type { + DnsType::Dns => Multiaddr::empty() + .with(Protocol::Dns(Cow::Owned(address))) + .with(Protocol::Tcp(port)), + DnsType::Dns4 => Multiaddr::empty() + .with(Protocol::Dns4(Cow::Owned(address))) + .with(Protocol::Tcp(port)), + DnsType::Dns6 => Multiaddr::empty() + .with(Protocol::Dns6(Cow::Owned(address))) + .with(Protocol::Tcp(port)), + }, + }; + let endpoint = match role { + Role::Dialer => Endpoint::dialer(address, connection_id), + Role::Listener => Endpoint::listener(address, connection_id), + }; + + Ok(NegotiatedConnection { + peer, + control, + connection, + endpoint, + substream_open_timeout, + }) + } + + /// Handles the yamux substream. + /// + /// Returns `true` if the connection handler should exit. + async fn handle_yamux_substream( + &mut self, + substream: Option>, + ) -> crate::Result { + match substream { + Some(Ok(stream)) => { + let substream_id = { + let substream_id = self.next_substream_id.fetch_add(1usize, Ordering::Relaxed); + SubstreamId::from(substream_id) + }; + let protocols = self.protocol_set.protocols_with_keep_alives(); + // This permit will be passed on until the substream is reported to the + // [`TransportService`](crate::protocol::TransportService), where the connection + // will be upgraded and the permit won't be needed anymore. + let permit = self.protocol_set.try_get_permit().ok_or(Error::ConnectionClosed)?; + let open_timeout = self.substream_open_timeout; + + self.pending_substreams.push(Box::pin(async move { + match tokio::time::timeout( + open_timeout, + Self::accept_substream( + stream, + permit, + substream_id, + protocols, + open_timeout, + ), + ) + .await + { + Ok(Ok(substream)) => Ok(substream), + Ok(Err(error)) => Err(ConnectionError::FailedToNegotiate { + protocol: None, + substream_id: None, + error: SubstreamError::NegotiationError(error), + }), + Err(_) => Err(ConnectionError::Timeout { + protocol: None, + substream_id: None, + }), + } + })); + + Ok(false) + } + Some(Err(error)) => { + tracing::debug!( + target: LOG_TARGET, + peer = ?self.peer, + ?error, + "connection closed with error", + ); + + self.protocol_set + .report_connection_closed(self.peer, self.endpoint.connection_id()) + .await?; + Ok(true) + } + None => { + tracing::debug!(target: LOG_TARGET, peer = ?self.peer, "connection closed"); + self.protocol_set + .report_connection_closed(self.peer, self.endpoint.connection_id()) + .await?; + Ok(true) + } + } + } + + /// Handles negotiated substream results. + async fn handle_negotiated_substream( + &mut self, + result: Result, + ) -> crate::Result<()> { + match result { + Err(error) => { + tracing::debug!( + target: LOG_TARGET, + ?error, + "failed to accept/open substream", + ); + + let (protocol, substream_id, error) = match error { + ConnectionError::Timeout { + protocol, + substream_id, + } => ( + protocol, + substream_id, + SubstreamError::NegotiationError(NegotiationError::Timeout), + ), + ConnectionError::FailedToNegotiate { + protocol, + substream_id, + error, + } => (protocol, substream_id, error), + }; + + match (protocol, substream_id) { + (Some(protocol), Some(substream_id)) => { + self.protocol_set + .report_substream_open_failure(protocol.clone(), substream_id, error) + .await + .inspect_err(|error| { + tracing::error!( + target: LOG_TARGET, + ?protocol, + endpoint = ?self.endpoint, + ?error, + "failed to register substream open failure to protocol" + ); + })?; + } + _ => {} + } + } + Ok(substream) => { + let protocol = substream.protocol.clone(); + let direction = substream.direction; + let substream_id = substream.substream_id; + let socket = FuturesAsyncReadCompatExt::compat(substream.io); + let bandwidth_sink = self.bandwidth_sink.clone(); + let opening_permit = substream.permit; + let lifetime_permit = substream.keep_alive.then(|| opening_permit.clone()); + + let substream = substream::Substream::new_tcp( + self.peer, + substream_id, + Substream::new(socket, bandwidth_sink, lifetime_permit), + self.protocol_set.protocol_codec(&protocol), + ); + + self.protocol_set + .report_substream_open( + self.peer, + protocol.clone(), + direction, + substream, + opening_permit, + ) + .await + .inspect_err(|error| { + tracing::error!( + target: LOG_TARGET, + ?protocol, + peer = ?self.peer, + endpoint = ?self.endpoint, + ?error, + "failed to register opened substream to protocol", + ); + })?; + } + } + + Ok(()) + } + + /// Handles protocol command. + /// + /// Returns `true` if the connection handler should exit. + async fn handle_protocol_command( + &mut self, + command: Option, + ) -> crate::Result { + match command { + Some(ProtocolCommand::OpenSubstream { + protocol, + fallback_names, + substream_id, + connection_id, + permit, + keep_alive, + }) => { + let control = self.control.clone(); + let open_timeout = self.substream_open_timeout; + + tracing::trace!( + target: LOG_TARGET, + ?protocol, + ?substream_id, + ?connection_id, + "open substream", + ); + + self.pending_substreams.push(Box::pin(async move { + match tokio::time::timeout( + open_timeout, + Self::open_substream( + control, + substream_id, + permit, + keep_alive, + protocol.clone(), + fallback_names, + open_timeout, + ), + ) + .await + { + Ok(Ok(substream)) => Ok(substream), + Ok(Err(error)) => Err(ConnectionError::FailedToNegotiate { + protocol: Some(protocol), + substream_id: Some(substream_id), + error, + }), + Err(_) => Err(ConnectionError::Timeout { + protocol: Some(protocol), + substream_id: Some(substream_id), + }), + } + })); + + Ok(false) + } + Some(ProtocolCommand::ForceClose) => { + tracing::debug!( + target: LOG_TARGET, + peer = ?self.peer, + connection_id = ?self.endpoint.connection_id(), + "force closing connection", + ); + + self.protocol_set + .report_connection_closed(self.peer, self.endpoint.connection_id()) + .await?; + Ok(true) + } + None => { + tracing::debug!(target: LOG_TARGET, "protocols have disconnected, closing connection"); + self.protocol_set + .report_connection_closed(self.peer, self.endpoint.connection_id()) + .await?; + Ok(true) + } + } + } + + /// Start the connection event loop without notifying protocols. + /// This is used when protocols have already been notified during accept(). + pub(crate) async fn start(mut self) -> crate::Result<()> { + loop { + tokio::select! { + substream = self.connection.next() => { + if self.handle_yamux_substream(substream).await? { + return Ok(()); + } + }, + substream = self.pending_substreams.select_next_some(), if !self.pending_substreams.is_empty() => { + self.handle_negotiated_substream(substream).await?; + } + protocol = self.protocol_set.next() => { + if self.handle_protocol_command(protocol).await? { + return Ok(()) + } + } + } + } + } +} + +#[cfg(test)] +mod tests { + use crate::transport::tcp::TcpTransport; + + use super::*; + use hickory_resolver::{name_server::TokioConnectionProvider, TokioResolver}; + use tokio::{io::AsyncWriteExt, net::TcpListener}; + + #[tokio::test] + async fn multistream_select_not_supported_dialer() { + let _ = tracing_subscriber::fmt() + .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) + .try_init(); + + let listener = TcpListener::bind("[::1]:0").await.unwrap(); + let address = listener.local_addr().unwrap(); + + tokio::spawn(async move { + let (mut stream, _) = listener.accept().await.unwrap(); + let _ = stream.write_all(&vec![0x12u8; 256]).await; + }); + + let (_, stream) = TcpTransport::dial_peer( + Multiaddr::empty() + .with(Protocol::from(address.ip())) + .with(Protocol::Tcp(address.port())), + Default::default(), + Duration::from_secs(10), + false, + Arc::new( + TokioResolver::builder_with_config( + Default::default(), + TokioConnectionProvider::default(), + ) + .build(), + ), + ) + .await + .unwrap(); + + match TcpConnection::open_connection( + ConnectionId::from(0usize), + Keypair::generate(), + stream, + AddressType::Socket(address), + None, + Default::default(), + 5, + 2, + Duration::from_secs(10), + Duration::from_secs(10), + ) + .await + { + Ok(_) => panic!("connection was supposed to fail"), + Err(NegotiationError::MultistreamSelectError( + crate::multistream_select::NegotiationError::ProtocolError( + crate::multistream_select::ProtocolError::InvalidMessage, + ), + )) => {} + Err(error) => panic!("invalid error: {error:?}"), + } + } + + #[tokio::test] + async fn multistream_select_not_supported_listener() { + let _ = tracing_subscriber::fmt() + .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) + .try_init(); + + let listener = TcpListener::bind("[::1]:0").await.unwrap(); + let address = listener.local_addr().unwrap(); + + let (Ok(mut dialer), Ok((stream, dialer_address))) = + tokio::join!(TcpStream::connect(address), listener.accept(),) + else { + panic!("failed to establish connection"); + }; + + tokio::spawn(async move { + let _ = dialer.write_all(&vec![0x12u8; 256]).await; + }); + + match TcpConnection::accept_connection( + stream, + ConnectionId::from(0usize), + Keypair::generate(), + dialer_address, + Default::default(), + 5, + 2, + Duration::from_secs(10), + Duration::from_secs(10), + ) + .await + { + Ok(_) => panic!("connection was supposed to fail"), + Err(NegotiationError::MultistreamSelectError( + crate::multistream_select::NegotiationError::ProtocolError( + crate::multistream_select::ProtocolError::InvalidMessage, + ), + )) => {} + Err(error) => panic!("invalid error: {error:?}"), + } + } + + #[tokio::test] + async fn noise_not_supported_dialer() { + let _ = tracing_subscriber::fmt() + .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) + .try_init(); + + let listener = TcpListener::bind("[::1]:0").await.unwrap(); + let address = listener.local_addr().unwrap(); + + tokio::spawn(async move { + let (stream, _) = listener.accept().await.unwrap(); + let stream = TokioAsyncReadCompatExt::compat(stream).into_inner(); + let stream = TokioAsyncWriteCompatExt::compat_write(stream); + + // attempt to negotiate yamux, skipping noise entirely + assert!(listener_select_proto(stream, vec!["/yamux/1.0.0"]).await.is_err()); + }); + + let (_, stream) = TcpTransport::dial_peer( + Multiaddr::empty() + .with(Protocol::from(address.ip())) + .with(Protocol::Tcp(address.port())), + Default::default(), + Duration::from_secs(10), + false, + Arc::new( + TokioResolver::builder_with_config( + Default::default(), + TokioConnectionProvider::default(), + ) + .build(), + ), + ) + .await + .unwrap(); + + match TcpConnection::open_connection( + ConnectionId::from(0usize), + Keypair::generate(), + stream, + AddressType::Socket(address), + None, + Default::default(), + 5, + 2, + Duration::from_secs(10), + Duration::from_secs(10), + ) + .await + { + Ok(_) => panic!("connection was supposed to fail"), + Err(NegotiationError::MultistreamSelectError( + crate::multistream_select::NegotiationError::Failed, + )) => {} + Err(error) => panic!("invalid error: {error:?}"), + } + } + + #[tokio::test] + async fn noise_not_supported_listener() { + let _ = tracing_subscriber::fmt() + .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) + .try_init(); + + let listener = TcpListener::bind("[::1]:0").await.unwrap(); + let address = listener.local_addr().unwrap(); + + let (Ok(dialer), Ok((listener, dialer_address))) = + tokio::join!(TcpStream::connect(address), listener.accept(),) + else { + panic!("failed to establish connection"); + }; + + tokio::spawn(async move { + let dialer = TokioAsyncReadCompatExt::compat(dialer).into_inner(); + let dialer = TokioAsyncWriteCompatExt::compat_write(dialer); + + // attempt to negotiate yamux, skipping noise entirely + assert!(dialer_select_proto(dialer, vec!["/yamux/1.0.0"], Version::V1).await.is_err()); + }); + + match TcpConnection::accept_connection( + listener, + ConnectionId::from(0usize), + Keypair::generate(), + dialer_address, + Default::default(), + 5, + 2, + Duration::from_secs(10), + Duration::from_secs(10), + ) + .await + { + Ok(_) => panic!("connection was supposed to fail"), + Err(NegotiationError::MultistreamSelectError( + crate::multistream_select::NegotiationError::Failed, + )) => {} + Err(error) => panic!("invalid error: {error:?}"), + } + } + + #[tokio::test] + async fn noise_timeout_listener() { + let _ = tracing_subscriber::fmt() + .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) + .try_init(); + + let listener = TcpListener::bind("[::1]:0").await.unwrap(); + let address = listener.local_addr().unwrap(); + + let (Ok(dialer), Ok((listener, dialer_address))) = + tokio::join!(TcpStream::connect(address), listener.accept(),) + else { + panic!("failed to establish connection"); + }; + + tokio::spawn(async move { + let dialer = TokioAsyncReadCompatExt::compat(dialer).into_inner(); + let dialer = TokioAsyncWriteCompatExt::compat_write(dialer); + + // attempt to negotiate yamux, skipping noise entirely + let (_protocol, _socket) = + dialer_select_proto(dialer, vec!["/noise"], Version::V1).await.unwrap(); + + tokio::time::sleep(std::time::Duration::from_secs(60)).await; + }); + + match TcpConnection::accept_connection( + listener, + ConnectionId::from(0usize), + Keypair::generate(), + dialer_address, + Default::default(), + 5, + 2, + Duration::from_secs(10), + Duration::from_secs(10), + ) + .await + { + Ok(_) => panic!("connection was supposed to fail"), + Err(NegotiationError::Timeout) => {} + Err(error) => panic!("invalid error: {error:?}"), + } + } + + #[tokio::test] + async fn noise_timeout_dialer() { + let _ = tracing_subscriber::fmt() + .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) + .try_init(); + + let listener = TcpListener::bind("[::1]:0").await.unwrap(); + let address = listener.local_addr().unwrap(); + + tokio::spawn(async move { + let (stream, _) = listener.accept().await.unwrap(); + let stream = TokioAsyncReadCompatExt::compat(stream).into_inner(); + let stream = TokioAsyncWriteCompatExt::compat_write(stream); + + // negotiate noise but never actually send any handshake data + let (_protocol, _socket) = listener_select_proto(stream, vec!["/noise"]).await.unwrap(); + + tokio::time::sleep(std::time::Duration::from_secs(60)).await; + }); + + let (_, stream) = TcpTransport::dial_peer( + Multiaddr::empty() + .with(Protocol::from(address.ip())) + .with(Protocol::Tcp(address.port())), + Default::default(), + Duration::from_secs(10), + false, + Arc::new( + TokioResolver::builder_with_config( + Default::default(), + TokioConnectionProvider::default(), + ) + .build(), + ), + ) + .await + .unwrap(); + + match TcpConnection::open_connection( + ConnectionId::from(0usize), + Keypair::generate(), + stream, + AddressType::Socket(address), + None, + Default::default(), + 5, + 2, + Duration::from_secs(10), + Duration::from_secs(10), + ) + .await + { + Ok(_) => panic!("connection was supposed to fail"), + Err(NegotiationError::Timeout) => {} + Err(error) => panic!("invalid error: {error:?}"), + } + } + + #[tokio::test] + async fn multistream_select_timeout_dialer() { + let _ = tracing_subscriber::fmt() + .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) + .try_init(); + + let listener = TcpListener::bind("[::1]:0").await.unwrap(); + let address = listener.local_addr().unwrap(); + + tokio::spawn(async move { + let _stream = listener.accept().await.unwrap(); + + tokio::time::sleep(std::time::Duration::from_secs(60)).await; + }); + + let (_, stream) = TcpTransport::dial_peer( + Multiaddr::empty() + .with(Protocol::from(address.ip())) + .with(Protocol::Tcp(address.port())), + Default::default(), + Duration::from_secs(10), + false, + Arc::new( + TokioResolver::builder_with_config( + Default::default(), + TokioConnectionProvider::default(), + ) + .build(), + ), + ) + .await + .unwrap(); + + match TcpConnection::open_connection( + ConnectionId::from(0usize), + Keypair::generate(), + stream, + AddressType::Socket(address), + None, + Default::default(), + 5, + 2, + Duration::from_secs(10), + Duration::from_secs(10), + ) + .await + { + Ok(_) => panic!("connection was supposed to fail"), + Err(NegotiationError::Timeout) => {} + Err(error) => panic!("invalid error: {error:?}"), + } + } + + #[tokio::test] + async fn multistream_select_timeout_listener() { + let _ = tracing_subscriber::fmt() + .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) + .try_init(); + + let listener = TcpListener::bind("[::1]:0").await.unwrap(); + let address = listener.local_addr().unwrap(); + + let (Ok(_dialer), Ok((listener, dialer_address))) = + tokio::join!(TcpStream::connect(address), listener.accept(),) + else { + panic!("failed to establish connection"); + }; + + tokio::spawn(async move { + let _stream = TcpStream::connect(address).await.unwrap(); + + tokio::time::sleep(std::time::Duration::from_secs(60)).await; + }); + + match TcpConnection::accept_connection( + listener, + ConnectionId::from(0usize), + Keypair::generate(), + dialer_address, + Default::default(), + 5, + 2, + Duration::from_secs(10), + Duration::from_secs(10), + ) + .await + { + Ok(_) => panic!("connection was supposed to fail"), + Err(NegotiationError::Timeout) => {} + Err(error) => panic!("invalid error: {error:?}"), + } + } + + #[tokio::test] + async fn yamux_not_supported_dialer() { + let _ = tracing_subscriber::fmt() + .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) + .try_init(); + + let listener = TcpListener::bind("[::1]:0").await.unwrap(); + let address = listener.local_addr().unwrap(); + + let (Ok(dialer), Ok((listener, dialer_address))) = + tokio::join!(TcpStream::connect(address), listener.accept(),) + else { + panic!("failed to establish connection"); + }; + + tokio::spawn(async move { + let dialer = TokioAsyncReadCompatExt::compat(dialer).into_inner(); + let dialer = TokioAsyncWriteCompatExt::compat_write(dialer); + + // negotiate noise + let (_protocol, stream) = + dialer_select_proto(dialer, vec!["/noise"], Version::V1).await.unwrap(); + + let keypair = Keypair::generate(); + + // do a noise handshake + let (stream, _peer) = noise::handshake( + stream.inner(), + &keypair, + Role::Dialer, + 5, + 2, + std::time::Duration::from_secs(10), + noise::HandshakeTransport::Tcp, + ) + .await + .unwrap(); + let stream: NoiseSocket> = stream; + + // after the handshake, try to negotiate some random protocol instead of yamux + assert!( + dialer_select_proto(stream, vec!["/unsupported/1"], Version::V1).await.is_err() + ); + }); + + match TcpConnection::accept_connection( + listener, + ConnectionId::from(0usize), + Keypair::generate(), + dialer_address, + Default::default(), + 5, + 2, + Duration::from_secs(10), + Duration::from_secs(10), + ) + .await + { + Ok(_) => panic!("connection was supposed to fail"), + Err(NegotiationError::MultistreamSelectError( + crate::multistream_select::NegotiationError::Failed, + )) => {} + Err(error) => panic!("{error:?}"), + } + } + + #[tokio::test] + async fn yamux_not_supported_listener() { + let _ = tracing_subscriber::fmt() + .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) + .try_init(); + + let listener = TcpListener::bind("[::1]:0").await.unwrap(); + let address = listener.local_addr().unwrap(); + + tokio::spawn(async move { + let (stream, _) = listener.accept().await.unwrap(); + let stream = TokioAsyncReadCompatExt::compat(stream).into_inner(); + let stream = TokioAsyncWriteCompatExt::compat_write(stream); + + // negotiate noise + let (_protocol, stream) = listener_select_proto(stream, vec!["/noise"]).await.unwrap(); + + // do a noise handshake + let keypair = Keypair::generate(); + let (stream, _peer) = noise::handshake( + stream.inner(), + &keypair, + Role::Listener, + 5, + 2, + std::time::Duration::from_secs(10), + noise::HandshakeTransport::Tcp, + ) + .await + .unwrap(); + let stream: NoiseSocket> = stream; + + // after the handshake, try to negotiate some random protocol instead of yamux + assert!(listener_select_proto(stream, vec!["/unsupported/1"]).await.is_err()); + }); + + let (_, stream) = TcpTransport::dial_peer( + Multiaddr::empty() + .with(Protocol::from(address.ip())) + .with(Protocol::Tcp(address.port())), + Default::default(), + Duration::from_secs(10), + false, + Arc::new( + TokioResolver::builder_with_config( + Default::default(), + TokioConnectionProvider::default(), + ) + .build(), + ), + ) + .await + .unwrap(); + + match TcpConnection::open_connection( + ConnectionId::from(0usize), + Keypair::generate(), + stream, + AddressType::Socket(address), + None, + Default::default(), + 5, + 2, + Duration::from_secs(10), + Duration::from_secs(10), + ) + .await + { + Ok(_) => panic!("connection was supposed to fail"), + Err(NegotiationError::MultistreamSelectError( + crate::multistream_select::NegotiationError::Failed, + )) => {} + Err(error) => panic!("{error:?}"), + } + } + + #[tokio::test] + async fn yamux_timeout_dialer() { + let _ = tracing_subscriber::fmt() + .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) + .try_init(); + + let listener = TcpListener::bind("[::1]:0").await.unwrap(); + let address = listener.local_addr().unwrap(); + + let (Ok(dialer), Ok((listener, dialer_address))) = + tokio::join!(TcpStream::connect(address), listener.accept()) + else { + panic!("failed to establish connection"); + }; + + tokio::spawn(async move { + let dialer = TokioAsyncReadCompatExt::compat(dialer).into_inner(); + let dialer = TokioAsyncWriteCompatExt::compat_write(dialer); + + // negotiate noise + let (_protocol, stream) = + dialer_select_proto(dialer, vec!["/noise"], Version::V1).await.unwrap(); + + // do a noise handshake + let keypair = Keypair::generate(); + let (stream, _peer) = noise::handshake( + stream.inner(), + &keypair, + Role::Dialer, + 5, + 2, + std::time::Duration::from_secs(10), + noise::HandshakeTransport::Tcp, + ) + .await + .unwrap(); + let _stream: NoiseSocket> = stream; + + tokio::time::sleep(std::time::Duration::from_secs(60)).await; + }); + + match TcpConnection::accept_connection( + listener, + ConnectionId::from(0usize), + Keypair::generate(), + dialer_address, + Default::default(), + 5, + 2, + Duration::from_secs(10), + Duration::from_secs(10), + ) + .await + { + Ok(_) => panic!("connection was supposed to fail"), + Err(NegotiationError::Timeout) => {} + Err(error) => panic!("invalid error: {error:?}"), + } + } + + #[tokio::test] + async fn yamux_timeout_listener() { + let _ = tracing_subscriber::fmt() + .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) + .try_init(); + + let listener = TcpListener::bind("[::1]:0").await.unwrap(); + let address = listener.local_addr().unwrap(); + + tokio::spawn(async move { + let (stream, _) = listener.accept().await.unwrap(); + let stream = TokioAsyncReadCompatExt::compat(stream).into_inner(); + let stream = TokioAsyncWriteCompatExt::compat_write(stream); + + // negotiate noise + let (_protocol, stream) = listener_select_proto(stream, vec!["/noise"]).await.unwrap(); + + // do a noise handshake + let keypair = Keypair::generate(); + let (stream, _peer) = noise::handshake( + stream.inner(), + &keypair, + Role::Listener, + 5, + 2, + std::time::Duration::from_secs(10), + noise::HandshakeTransport::Tcp, + ) + .await + .unwrap(); + let _stream: NoiseSocket> = stream; + + tokio::time::sleep(std::time::Duration::from_secs(60)).await; + }); + + let (_, stream) = TcpTransport::dial_peer( + Multiaddr::empty() + .with(Protocol::from(address.ip())) + .with(Protocol::Tcp(address.port())), + Default::default(), + Duration::from_secs(10), + false, + Arc::new( + TokioResolver::builder_with_config( + Default::default(), + TokioConnectionProvider::default(), + ) + .build(), + ), + ) + .await + .unwrap(); + + match TcpConnection::open_connection( + ConnectionId::from(0usize), + Keypair::generate(), + stream, + AddressType::Socket(address), + None, + Default::default(), + 5, + 2, + Duration::from_secs(10), + Duration::from_secs(10), + ) + .await + { + Ok(_) => panic!("connection was supposed to fail"), + Err(NegotiationError::Timeout) => {} + Err(error) => panic!("invalid error: {error:?}"), + } + } +} diff --git a/client/litep2p/src/transport/tcp/mod.rs b/client/litep2p/src/transport/tcp/mod.rs new file mode 100644 index 00000000..46564186 --- /dev/null +++ b/client/litep2p/src/transport/tcp/mod.rs @@ -0,0 +1,1077 @@ +// Copyright 2020 Parity Technologies (UK) Ltd. +// Copyright 2023 litep2p developers +// +// Permission is hereby granted, free of charge, to any person obtaining a +// copy of this software and associated documentation files (the "Software"), +// to deal in the Software without restriction, including without limitation +// the rights to use, copy, modify, merge, publish, distribute, sublicense, +// and/or sell copies of the Software, and to permit persons to whom the +// Software is furnished to do so, subject to the following conditions: +// +// The above copyright notice and this permission notice shall be included in +// all copies or substantial portions of the Software. +// +// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS +// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE +// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER +// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING +// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER +// DEALINGS IN THE SOFTWARE. + +//! TCP transport. + +use crate::{ + error::{DialError, Error}, + transport::{ + common::listener::{DialAddresses, GetSocketAddr, SocketListener, TcpAddress}, + manager::TransportHandle, + tcp::{ + config::Config, + connection::{NegotiatedConnection, TcpConnection}, + }, + Transport, TransportBuilder, TransportEvent, DIAL_DEADLINE_MULTIPLIER, + }, + types::ConnectionId, + utils::futures_stream::FuturesStream, +}; + +use futures::{ + future::BoxFuture, + stream::{AbortHandle, Stream, StreamExt}, + TryFutureExt, +}; +use hickory_resolver::TokioResolver; +use multiaddr::Multiaddr; +use socket2::{Domain, Socket, Type}; +use tokio::net::TcpStream; + +use std::{ + collections::HashMap, + net::SocketAddr, + pin::Pin, + sync::Arc, + task::{Context, Poll}, + time::Duration, +}; + +pub(crate) use substream::Substream; + +mod connection; +mod substream; + +pub mod config; + +/// Logging target for the file. +const LOG_TARGET: &str = "litep2p::tcp"; + +/// Pending inbound connection. +struct PendingInboundConnection { + /// Socket address of the remote peer. + connection: TcpStream, + /// Address of the remote peer. + address: SocketAddr, +} + +#[derive(Debug)] +enum RawConnectionResult { + /// The first successful connection. + Connected { + negotiated: NegotiatedConnection, + errors: Vec<(Multiaddr, DialError)>, + }, + + /// All connection attempts failed. + Failed { + connection_id: ConnectionId, + errors: Vec<(Multiaddr, DialError)>, + }, + + /// Future was canceled. + Canceled { connection_id: ConnectionId }, +} + +/// TCP transport. +pub(crate) struct TcpTransport { + /// Transport context. + context: TransportHandle, + + /// Transport configuration. + config: Config, + + /// TCP listener. + listener: SocketListener, + + /// Pending dials. + pending_dials: HashMap, + + /// Dial addresses. + dial_addresses: DialAddresses, + + /// Pending inbound connections. + pending_inbound_connections: HashMap, + + /// Pending opening connections. + pending_connections: + FuturesStream>>, + + /// Pending raw, unnegotiated connections. + pending_raw_connections: FuturesStream>, + + /// Opened raw connection, waiting for approval/rejection from `TransportManager`. + opened: HashMap, + + /// Cancel raw connections futures. + /// + /// This is cancelling `Self::pending_raw_connections`. + cancel_futures: HashMap, + + /// Connections which have been opened and negotiated but are being validated by the + /// `TransportManager`. + pending_open: HashMap, + + /// DNS resolver. + resolver: Arc, +} + +impl TcpTransport { + /// Handle inbound TCP connection. + fn on_inbound_connection( + &mut self, + connection_id: ConnectionId, + connection: TcpStream, + address: SocketAddr, + ) { + let yamux_config = self.config.yamux_config.clone(); + let max_read_ahead_factor = self.config.noise_read_ahead_frame_count; + let max_write_buffer_size = self.config.noise_write_buffer_size; + let connection_open_timeout = self.config.connection_open_timeout; + let substream_open_timeout = self.config.substream_open_timeout; + let keypair = self.context.keypair.clone(); + + tracing::trace!( + target: LOG_TARGET, + ?connection_id, + ?address, + "accept connection", + ); + + self.pending_connections.push(Box::pin(async move { + TcpConnection::accept_connection( + connection, + connection_id, + keypair, + address, + yamux_config, + max_read_ahead_factor, + max_write_buffer_size, + connection_open_timeout, + substream_open_timeout, + ) + .await + .map_err(|error| (connection_id, error.into())) + })); + } + + /// Dial remote peer + async fn dial_peer( + address: Multiaddr, + dial_addresses: DialAddresses, + connection_open_timeout: Duration, + nodelay: bool, + resolver: Arc, + ) -> Result<(Multiaddr, TcpStream), DialError> { + let (socket_address, _) = TcpAddress::multiaddr_to_socket_address(&address)?; + + let remote_address = + match tokio::time::timeout(connection_open_timeout, socket_address.lookup_ip(resolver)) + .await + { + Err(_) => { + tracing::debug!( + target: LOG_TARGET, + ?address, + ?connection_open_timeout, + "failed to resolve address within timeout", + ); + return Err(DialError::Timeout); + } + Ok(Err(error)) => return Err(error.into()), + Ok(Ok(address)) => address, + }; + + let domain = match remote_address.is_ipv4() { + true => Domain::IPV4, + false => Domain::IPV6, + }; + let socket = Socket::new(domain, Type::STREAM, Some(socket2::Protocol::TCP))?; + if remote_address.is_ipv6() { + socket.set_only_v6(true)?; + } + socket.set_nonblocking(true)?; + socket.set_nodelay(nodelay)?; + + match dial_addresses.local_dial_address(&remote_address.ip()) { + Ok(Some(dial_address)) => { + socket.set_reuse_address(true)?; + #[cfg(unix)] + socket.set_reuse_port(true)?; + socket.bind(&dial_address.into())?; + } + Ok(None) => {} + Err(()) => { + tracing::debug!( + target: LOG_TARGET, + ?remote_address, + "tcp listener not enabled for remote address, using ephemeral port", + ); + } + } + + let future = async move { + match socket.connect(&remote_address.into()) { + Ok(()) => {} + Err(err) if err.raw_os_error() == Some(libc::EINPROGRESS) => {} + Err(err) if err.kind() == std::io::ErrorKind::WouldBlock => {} + Err(err) => return Err(err), + } + + let stream = TcpStream::try_from(Into::::into(socket))?; + stream.writable().await?; + + if let Some(e) = stream.take_error()? { + return Err(e); + } + + Ok((address, stream)) + }; + + match tokio::time::timeout(connection_open_timeout, future).await { + Err(_) => { + tracing::debug!( + target: LOG_TARGET, + ?connection_open_timeout, + "failed to connect within timeout", + ); + Err(DialError::Timeout) + } + Ok(Err(error)) => Err(error.into()), + Ok(Ok((address, stream))) => { + tracing::debug!( + target: LOG_TARGET, + ?address, + "connected", + ); + + Ok((address, stream)) + } + } + } +} + +impl TransportBuilder for TcpTransport { + type Config = Config; + type Transport = TcpTransport; + + /// Create new [`TcpTransport`]. + fn new( + context: TransportHandle, + mut config: Self::Config, + resolver: Arc, + ) -> crate::Result<(Self, Vec)> { + tracing::debug!( + target: LOG_TARGET, + listen_addresses = ?config.listen_addresses, + "start tcp transport", + ); + + // start tcp listeners for all listen addresses + let (listener, listen_addresses, dial_addresses) = SocketListener::new::( + std::mem::take(&mut config.listen_addresses), + config.reuse_port, + config.nodelay, + ); + + Ok(( + Self { + listener, + config, + context, + dial_addresses, + opened: HashMap::new(), + pending_open: HashMap::new(), + pending_dials: HashMap::new(), + pending_inbound_connections: HashMap::new(), + pending_connections: FuturesStream::new(), + pending_raw_connections: FuturesStream::new(), + cancel_futures: HashMap::new(), + resolver, + }, + listen_addresses, + )) + } +} + +impl Transport for TcpTransport { + fn dial(&mut self, connection_id: ConnectionId, address: Multiaddr) -> crate::Result<()> { + tracing::debug!(target: LOG_TARGET, ?connection_id, ?address, "open connection"); + + let (socket_address, peer) = TcpAddress::multiaddr_to_socket_address(&address)?; + let yamux_config = self.config.yamux_config.clone(); + let max_read_ahead_factor = self.config.noise_read_ahead_frame_count; + let max_write_buffer_size = self.config.noise_write_buffer_size; + let connection_open_timeout = self.config.connection_open_timeout; + let substream_open_timeout = self.config.substream_open_timeout; + let dial_addresses = self.dial_addresses.clone(); + let keypair = self.context.keypair.clone(); + let nodelay = self.config.nodelay; + let resolver = self.resolver.clone(); + + self.pending_dials.insert(connection_id, address.clone()); + self.pending_connections.push(Box::pin(async move { + let (_, stream) = TcpTransport::dial_peer( + address, + dial_addresses, + connection_open_timeout, + nodelay, + resolver, + ) + .await + .map_err(|error| (connection_id, error))?; + + TcpConnection::open_connection( + connection_id, + keypair, + stream, + socket_address, + peer, + yamux_config, + max_read_ahead_factor, + max_write_buffer_size, + connection_open_timeout, + substream_open_timeout, + ) + .await + .map_err(|error| (connection_id, error.into())) + })); + + Ok(()) + } + + fn accept_pending(&mut self, connection_id: ConnectionId) -> crate::Result<()> { + let pending = self.pending_inbound_connections.remove(&connection_id).ok_or_else(|| { + tracing::error!( + target: LOG_TARGET, + ?connection_id, + "Cannot accept non existent pending connection", + ); + + Error::ConnectionDoesntExist(connection_id) + })?; + + self.on_inbound_connection(connection_id, pending.connection, pending.address); + + Ok(()) + } + + fn reject_pending(&mut self, connection_id: ConnectionId) -> crate::Result<()> { + self.pending_inbound_connections.remove(&connection_id).map_or_else( + || { + tracing::error!( + target: LOG_TARGET, + ?connection_id, + "Cannot reject non existent pending connection", + ); + + Err(Error::ConnectionDoesntExist(connection_id)) + }, + |_| Ok(()), + ) + } + + fn accept( + &mut self, + connection_id: ConnectionId, + ) -> crate::Result>> { + let context = self + .pending_open + .remove(&connection_id) + .ok_or(Error::ConnectionDoesntExist(connection_id))?; + let mut protocol_set = self.context.protocol_set(connection_id); + let bandwidth_sink = self.context.bandwidth_sink.clone(); + let next_substream_id = self.context.next_substream_id.clone(); + let executor = self.context.executor.clone(); + + tracing::trace!( + target: LOG_TARGET, + ?connection_id, + "start connection", + ); + + let peer = context.peer(); + let endpoint = context.endpoint().clone(); + + Ok(Box::pin(async move { + // First, notify all protocols about the connection establishment + // This ensures that when the accept() future completes, protocols are ready + protocol_set.report_connection_established(peer, endpoint).await?; + + // After protocols are notified, spawn the connection event loop + executor.run(Box::pin(async move { + if let Err(error) = + TcpConnection::new(context, protocol_set, bandwidth_sink, next_substream_id) + .start() + .await + { + tracing::debug!( + target: LOG_TARGET, + ?connection_id, + ?error, + "connection exited with error", + ); + } + })); + + Ok(()) + })) + } + + fn reject(&mut self, connection_id: ConnectionId) -> crate::Result<()> { + self.pending_open + .remove(&connection_id) + .map_or(Err(Error::ConnectionDoesntExist(connection_id)), |_| Ok(())) + } + + fn open( + &mut self, + connection_id: ConnectionId, + addresses: Vec, + ) -> crate::Result<()> { + let num_addresses = addresses.len(); + + let yamux_config = self.config.yamux_config.clone(); + let max_read_ahead_factor = self.config.noise_read_ahead_frame_count; + let max_write_buffer_size = self.config.noise_write_buffer_size; + let connection_open_timeout = self.config.connection_open_timeout; + let substream_open_timeout = self.config.substream_open_timeout; + let max_parallel_dials = self.config.max_parallel_dials; + let dial_addresses = self.dial_addresses.clone(); + let keypair = self.context.keypair.clone(); + let nodelay = self.config.nodelay; + let resolver = self.resolver.clone(); + + let futures = futures::stream::iter(addresses.into_iter().map(move |address| { + let yamux_config = yamux_config.clone(); + let dial_addresses = dial_addresses.clone(); + let keypair = keypair.clone(); + let resolver = resolver.clone(); + + async move { + let (address, stream) = TcpTransport::dial_peer( + address.clone(), + dial_addresses, + connection_open_timeout, + nodelay, + resolver, + ) + .await + .map_err(|error| (address, error))?; + + let open_address = address.clone(); + let (socket_address, peer) = TcpAddress::multiaddr_to_socket_address(&address) + .map_err(|error| (address, error.into()))?; + + TcpConnection::open_connection( + connection_id, + keypair, + stream, + socket_address, + peer, + yamux_config, + max_read_ahead_factor, + max_write_buffer_size, + connection_open_timeout, + substream_open_timeout, + ) + .await + .map_err(|error| (open_address, error.into())) + } + })) + .buffer_unordered(max_parallel_dials); + + // Future that will resolve to the first successful connection. + let future = async move { + let mut errors = Vec::with_capacity(num_addresses); + // Deadline for the overall dial attempt, including all retries. This is to prevent + // retry attempts from indefinitely delaying the dial result. + let dial_deadline = DIAL_DEADLINE_MULTIPLIER * connection_open_timeout; + let deadline = tokio::time::sleep(dial_deadline); + + tokio::pin!(deadline); + tokio::pin!(futures); + + loop { + tokio::select! { + result = futures.next() => { + match result { + Some(Ok(negotiated)) => { + return RawConnectionResult::Connected { + negotiated, + errors, + }; + } + Some(Err(error)) => { + tracing::debug!( + target: LOG_TARGET, + ?connection_id, + ?error, + "failed to open connection", + ); + errors.push(error); + } + None => { + return RawConnectionResult::Failed { + connection_id, + errors, + }; + } + } + } + _ = &mut deadline => { + tracing::debug!( + target: LOG_TARGET, + ?connection_id, + ?dial_deadline, + "overall dial timeout exceeded", + ); + return RawConnectionResult::Failed { + connection_id, + errors, + }; + } + } + } + }; + + let (fut, handle) = futures::future::abortable(future); + let fut = fut.unwrap_or_else(move |_| RawConnectionResult::Canceled { connection_id }); + self.pending_raw_connections.push(Box::pin(fut)); + self.cancel_futures.insert(connection_id, handle); + + Ok(()) + } + + fn negotiate(&mut self, connection_id: ConnectionId) -> crate::Result<()> { + let negotiated = self + .opened + .remove(&connection_id) + .ok_or(Error::ConnectionDoesntExist(connection_id))?; + + self.pending_connections.push(Box::pin(async move { Ok(negotiated) })); + + Ok(()) + } + + fn cancel(&mut self, connection_id: ConnectionId) { + // Cancel the future if it exists. + // State clean-up happens inside the `poll_next`. + if let Some(handle) = self.cancel_futures.get(&connection_id) { + handle.abort(); + } + } +} + +impl Stream for TcpTransport { + type Item = TransportEvent; + + fn poll_next(mut self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll> { + if let Poll::Ready(event) = self.listener.poll_next_unpin(cx) { + return match event { + None => { + tracing::error!( + target: LOG_TARGET, + "TCP listener terminated, ignore if the node is stopping", + ); + + Poll::Ready(None) + } + Some(Err(error)) => { + tracing::error!( + target: LOG_TARGET, + ?error, + "TCP listener terminated with error", + ); + + Poll::Ready(None) + } + Some(Ok((connection, address))) => { + let connection_id = self.context.next_connection_id(); + tracing::trace!( + target: LOG_TARGET, + ?connection_id, + ?address, + "pending inbound TCP connection", + ); + + self.pending_inbound_connections.insert( + connection_id, + PendingInboundConnection { + connection, + address, + }, + ); + + Poll::Ready(Some(TransportEvent::PendingInboundConnection { + connection_id, + })) + } + }; + } + + while let Poll::Ready(Some(result)) = self.pending_raw_connections.poll_next_unpin(cx) { + tracing::trace!(target: LOG_TARGET, ?result, "raw connection result"); + + match result { + RawConnectionResult::Connected { negotiated, errors } => { + let Some(handle) = self.cancel_futures.remove(&negotiated.connection_id()) + else { + tracing::warn!( + target: LOG_TARGET, + connection_id = ?negotiated.connection_id(), + address = ?negotiated.endpoint().address(), + ?errors, + "raw connection without a cancel handle", + ); + continue; + }; + + if !handle.is_aborted() { + let connection_id = negotiated.connection_id(); + let address = negotiated.endpoint().address().clone(); + + self.opened.insert(connection_id, negotiated); + + return Poll::Ready(Some(TransportEvent::ConnectionOpened { + connection_id, + address, + errors, + })); + } + } + + RawConnectionResult::Failed { + connection_id, + errors, + } => { + let Some(handle) = self.cancel_futures.remove(&connection_id) else { + tracing::warn!( + target: LOG_TARGET, + ?connection_id, + ?errors, + "raw connection without a cancel handle", + ); + continue; + }; + + if !handle.is_aborted() { + return Poll::Ready(Some(TransportEvent::OpenFailure { + connection_id, + errors, + })); + } + } + RawConnectionResult::Canceled { connection_id } => { + if self.cancel_futures.remove(&connection_id).is_none() { + tracing::warn!( + target: LOG_TARGET, + ?connection_id, + "raw cancelled connection without a cancel handle", + ); + } + } + } + } + + while let Poll::Ready(Some(connection)) = self.pending_connections.poll_next_unpin(cx) { + match connection { + Ok(connection) => { + let peer = connection.peer(); + let endpoint = connection.endpoint(); + self.pending_dials.remove(&connection.connection_id()); + self.pending_open.insert(connection.connection_id(), connection); + + return Poll::Ready(Some(TransportEvent::ConnectionEstablished { + peer, + endpoint, + })); + } + Err((connection_id, error)) => { + if let Some(address) = self.pending_dials.remove(&connection_id) { + return Poll::Ready(Some(TransportEvent::DialFailure { + connection_id, + address, + error, + })); + } else { + tracing::debug!(target: LOG_TARGET, ?error, ?connection_id, "Pending inbound connection failed"); + } + } + } + } + + Poll::Pending + } +} + +#[cfg(test)] +mod tests { + use super::*; + use crate::{ + codec::ProtocolCodec, + crypto::ed25519::Keypair, + executor::DefaultExecutor, + protocol::SubstreamKeepAlive, + transport::manager::{ProtocolContext, SupportedTransport, TransportManagerBuilder}, + types::protocol::ProtocolName, + BandwidthSink, PeerId, + }; + use multiaddr::Protocol; + use multihash::Multihash; + use std::sync::Arc; + use tokio::sync::mpsc::channel; + + #[tokio::test] + async fn connect_and_accept_works() { + let _ = tracing_subscriber::fmt() + .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) + .try_init(); + + let keypair1 = Keypair::generate(); + let (tx1, _rx1) = channel(64); + let (event_tx1, _event_rx1) = channel(64); + let bandwidth_sink = BandwidthSink::new(); + + let handle1 = crate::transport::manager::TransportHandle { + executor: Arc::new(DefaultExecutor {}), + next_substream_id: Default::default(), + next_connection_id: Default::default(), + keypair: keypair1.clone(), + tx: event_tx1, + bandwidth_sink: bandwidth_sink.clone(), + + protocols: HashMap::from_iter([( + ProtocolName::from("/notif/1"), + ProtocolContext { + tx: tx1, + codec: ProtocolCodec::Identity(32), + fallback_names: Vec::new(), + keep_alive: SubstreamKeepAlive::Yes, + }, + )]), + }; + let transport_config1 = Config { + listen_addresses: vec!["/ip6/::1/tcp/0".parse().unwrap()], + ..Default::default() + }; + let resolver = Arc::new(TokioResolver::builder_tokio().unwrap().build()); + + let (mut transport1, listen_addresses) = + TcpTransport::new(handle1, transport_config1, resolver.clone()).unwrap(); + let listen_address = listen_addresses[0].clone(); + + let keypair2 = Keypair::generate(); + let (tx2, _rx2) = channel(64); + let (event_tx2, _event_rx2) = channel(64); + + let handle2 = crate::transport::manager::TransportHandle { + executor: Arc::new(DefaultExecutor {}), + next_substream_id: Default::default(), + next_connection_id: Default::default(), + keypair: keypair2.clone(), + tx: event_tx2, + bandwidth_sink: bandwidth_sink.clone(), + + protocols: HashMap::from_iter([( + ProtocolName::from("/notif/1"), + ProtocolContext { + tx: tx2, + codec: ProtocolCodec::Identity(32), + fallback_names: Vec::new(), + keep_alive: SubstreamKeepAlive::Yes, + }, + )]), + }; + let transport_config2 = Config { + listen_addresses: vec!["/ip6/::1/tcp/0".parse().unwrap()], + ..Default::default() + }; + + let (mut transport2, _) = TcpTransport::new(handle2, transport_config2, resolver).unwrap(); + transport2.dial(ConnectionId::new(), listen_address).unwrap(); + + let (tx, mut from_transport2) = channel(64); + tokio::spawn(async move { + let event = transport2.next().await; + tx.send(event).await.unwrap(); + }); + + let event = transport1.next().await.unwrap(); + match event { + TransportEvent::PendingInboundConnection { connection_id } => { + transport1.accept_pending(connection_id).unwrap(); + } + _ => panic!("unexpected event"), + } + + let event = transport1.next().await; + assert!(std::matches!( + event, + Some(TransportEvent::ConnectionEstablished { .. }) + )); + + let event = from_transport2.recv().await.unwrap(); + assert!(std::matches!( + event, + Some(TransportEvent::ConnectionEstablished { .. }) + )); + } + + #[tokio::test] + async fn connect_and_reject_works() { + let _ = tracing_subscriber::fmt() + .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) + .try_init(); + + let keypair1 = Keypair::generate(); + let (tx1, _rx1) = channel(64); + let (event_tx1, _event_rx1) = channel(64); + let bandwidth_sink = BandwidthSink::new(); + + let handle1 = crate::transport::manager::TransportHandle { + executor: Arc::new(DefaultExecutor {}), + next_substream_id: Default::default(), + next_connection_id: Default::default(), + keypair: keypair1.clone(), + tx: event_tx1, + bandwidth_sink: bandwidth_sink.clone(), + + protocols: HashMap::from_iter([( + ProtocolName::from("/notif/1"), + ProtocolContext { + tx: tx1, + codec: ProtocolCodec::Identity(32), + fallback_names: Vec::new(), + keep_alive: SubstreamKeepAlive::Yes, + }, + )]), + }; + let transport_config1 = Config { + listen_addresses: vec!["/ip6/::1/tcp/0".parse().unwrap()], + ..Default::default() + }; + let resolver = Arc::new(TokioResolver::builder_tokio().unwrap().build()); + + let (mut transport1, listen_addresses) = + TcpTransport::new(handle1, transport_config1, resolver.clone()).unwrap(); + let listen_address = listen_addresses[0].clone(); + + let keypair2 = Keypair::generate(); + let (tx2, _rx2) = channel(64); + let (event_tx2, _event_rx2) = channel(64); + + let handle2 = crate::transport::manager::TransportHandle { + executor: Arc::new(DefaultExecutor {}), + next_substream_id: Default::default(), + next_connection_id: Default::default(), + keypair: keypair2.clone(), + tx: event_tx2, + bandwidth_sink: bandwidth_sink.clone(), + + protocols: HashMap::from_iter([( + ProtocolName::from("/notif/1"), + ProtocolContext { + tx: tx2, + codec: ProtocolCodec::Identity(32), + fallback_names: Vec::new(), + keep_alive: SubstreamKeepAlive::Yes, + }, + )]), + }; + let transport_config2 = Config { + listen_addresses: vec!["/ip6/::1/tcp/0".parse().unwrap()], + ..Default::default() + }; + + let (mut transport2, _) = TcpTransport::new(handle2, transport_config2, resolver).unwrap(); + transport2.dial(ConnectionId::new(), listen_address).unwrap(); + + let (tx, mut from_transport2) = channel(64); + tokio::spawn(async move { + let event = transport2.next().await; + tx.send(event).await.unwrap(); + }); + + // Reject connection. + let event = transport1.next().await.unwrap(); + match event { + TransportEvent::PendingInboundConnection { connection_id } => { + transport1.reject_pending(connection_id).unwrap(); + } + _ => panic!("unexpected event"), + } + + let event = from_transport2.recv().await.unwrap(); + assert!(std::matches!( + event, + Some(TransportEvent::DialFailure { .. }) + )); + } + + #[tokio::test] + async fn dial_failure() { + let _ = tracing_subscriber::fmt() + .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) + .try_init(); + + let keypair1 = Keypair::generate(); + let (tx1, _rx1) = channel(64); + let (event_tx1, mut event_rx1) = channel(64); + let bandwidth_sink = BandwidthSink::new(); + + let handle1 = crate::transport::manager::TransportHandle { + executor: Arc::new(DefaultExecutor {}), + next_substream_id: Default::default(), + next_connection_id: Default::default(), + keypair: keypair1.clone(), + tx: event_tx1, + bandwidth_sink: bandwidth_sink.clone(), + + protocols: HashMap::from_iter([( + ProtocolName::from("/notif/1"), + ProtocolContext { + tx: tx1, + codec: ProtocolCodec::Identity(32), + fallback_names: Vec::new(), + keep_alive: SubstreamKeepAlive::Yes, + }, + )]), + }; + let resolver = Arc::new(TokioResolver::builder_tokio().unwrap().build()); + let (mut transport1, _) = + TcpTransport::new(handle1, Default::default(), resolver.clone()).unwrap(); + + tokio::spawn(async move { + while let Some(event) = transport1.next().await { + match event { + TransportEvent::ConnectionEstablished { .. } => {} + TransportEvent::ConnectionClosed { .. } => {} + TransportEvent::DialFailure { .. } => {} + TransportEvent::ConnectionOpened { .. } => {} + TransportEvent::OpenFailure { .. } => {} + TransportEvent::PendingInboundConnection { .. } => {} + } + } + }); + + let keypair2 = Keypair::generate(); + let (tx2, _rx2) = channel(64); + let (event_tx2, _event_rx2) = channel(64); + + let handle2 = crate::transport::manager::TransportHandle { + executor: Arc::new(DefaultExecutor {}), + next_substream_id: Default::default(), + next_connection_id: Default::default(), + keypair: keypair2.clone(), + tx: event_tx2, + bandwidth_sink: bandwidth_sink.clone(), + + protocols: HashMap::from_iter([( + ProtocolName::from("/notif/1"), + ProtocolContext { + tx: tx2, + codec: ProtocolCodec::Identity(32), + fallback_names: Vec::new(), + keep_alive: SubstreamKeepAlive::Yes, + }, + )]), + }; + + let (mut transport2, _) = TcpTransport::new(handle2, Default::default(), resolver).unwrap(); + + let peer1: PeerId = PeerId::from_public_key(&keypair1.public().into()); + let peer2: PeerId = PeerId::from_public_key(&keypair2.public().into()); + + tracing::info!(target: LOG_TARGET, "peer1 {peer1}, peer2 {peer2}"); + + let address = Multiaddr::empty() + .with(Protocol::Ip6(std::net::Ipv6Addr::new( + 0, 0, 0, 0, 0, 0, 0, 1, + ))) + .with(Protocol::Tcp(8888)) + .with(Protocol::P2p( + Multihash::from_bytes(&peer1.to_bytes()).unwrap(), + )); + + transport2.dial(ConnectionId::new(), address).unwrap(); + + // spawn the other connection in the background as it won't return anything + tokio::spawn(async move { + loop { + let _ = event_rx1.recv().await; + } + }); + + assert!(std::matches!( + transport2.next().await, + Some(TransportEvent::DialFailure { .. }) + )); + } + + #[tokio::test] + async fn dial_error_reported_for_outbound_connections() { + let mut manager = TransportManagerBuilder::new().build(); + let handle = manager.transport_handle(Arc::new(DefaultExecutor {})); + let resolver = Arc::new(TokioResolver::builder_tokio().unwrap().build()); + manager.register_transport( + SupportedTransport::Tcp, + Box::new(crate::transport::dummy::DummyTransport::new()), + ); + let (mut transport, _) = TcpTransport::new( + handle, + Config { + listen_addresses: vec!["/ip4/127.0.0.1/tcp/0".parse().unwrap()], + ..Default::default() + }, + resolver, + ) + .unwrap(); + + let keypair = Keypair::generate(); + let peer_id = PeerId::from_public_key(&keypair.public().into()); + let multiaddr = Multiaddr::empty() + .with(Protocol::Ip4(std::net::Ipv4Addr::new(255, 254, 253, 252))) + .with(Protocol::Tcp(8888)) + .with(Protocol::P2p( + Multihash::from_bytes(&peer_id.to_bytes()).unwrap(), + )); + manager.dial_address(multiaddr.clone()).await.unwrap(); + + assert!(transport.pending_dials.is_empty()); + + match transport.dial(ConnectionId::from(0usize), multiaddr) { + Ok(()) => {} + _ => panic!("invalid result for `on_dial_peer()`"), + } + + assert!(!transport.pending_dials.is_empty()); + transport.pending_connections.push(Box::pin(async move { + Err((ConnectionId::from(0usize), DialError::Timeout)) + })); + + assert!(std::matches!( + transport.next().await, + Some(TransportEvent::DialFailure { .. }) + )); + assert!(transport.pending_dials.is_empty()); + } +} diff --git a/client/litep2p/src/transport/tcp/substream.rs b/client/litep2p/src/transport/tcp/substream.rs new file mode 100644 index 00000000..b8ea5bf0 --- /dev/null +++ b/client/litep2p/src/transport/tcp/substream.rs @@ -0,0 +1,126 @@ +// Copyright 2023 litep2p developers +// +// Permission is hereby granted, free of charge, to any person obtaining a +// copy of this software and associated documentation files (the "Software"), +// to deal in the Software without restriction, including without limitation +// the rights to use, copy, modify, merge, publish, distribute, sublicense, +// and/or sell copies of the Software, and to permit persons to whom the +// Software is furnished to do so, subject to the following conditions: +// +// The above copyright notice and this permission notice shall be included in +// all copies or substantial portions of the Software. +// +// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS +// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE +// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER +// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING +// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER +// DEALINGS IN THE SOFTWARE. + +use crate::{protocol::Permit, BandwidthSink}; + +use tokio::io::{AsyncRead, AsyncWrite}; +use tokio_util::compat::Compat; + +use std::{ + io, + pin::Pin, + task::{Context, Poll}, +}; + +/// Substream that holds the inner substream provided by the transport +/// and a permit which keeps the connection open. +/// +/// `BandwidthSink` is used to meter inbound/outbound bytes. +#[derive(Debug)] +pub struct Substream { + /// Underlying socket. + io: Compat, + + /// Bandwidth sink. + bandwidth_sink: BandwidthSink, + + /// Permit holding the connection alive while the substream exists. + /// + /// `None` for ping & identify substreams, `Some` for others. + _lifetime_permit: Option, +} + +impl Substream { + /// Create new [`Substream`]. + pub fn new( + io: Compat, + bandwidth_sink: BandwidthSink, + lifetime_permit: Option, + ) -> Self { + Self { + io, + bandwidth_sink, + _lifetime_permit: lifetime_permit, + } + } +} + +impl AsyncRead for Substream { + fn poll_read( + mut self: Pin<&mut Self>, + cx: &mut Context<'_>, + buf: &mut tokio::io::ReadBuf<'_>, + ) -> Poll> { + let len = buf.filled().len(); + match futures::ready!(Pin::new(&mut self.io).poll_read(cx, buf)) { + Err(error) => Poll::Ready(Err(error)), + Ok(res) => { + let inbound_size = buf.filled().len().saturating_sub(len); + self.bandwidth_sink.increase_inbound(inbound_size); + Poll::Ready(Ok(res)) + } + } + } +} + +impl AsyncWrite for Substream { + fn poll_write( + mut self: Pin<&mut Self>, + cx: &mut Context<'_>, + buf: &[u8], + ) -> Poll> { + match futures::ready!(Pin::new(&mut self.io).poll_write(cx, buf)) { + Err(error) => Poll::Ready(Err(error)), + Ok(nwritten) => { + self.bandwidth_sink.increase_outbound(nwritten); + Poll::Ready(Ok(nwritten)) + } + } + } + + fn poll_flush(mut self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll> { + Pin::new(&mut self.io).poll_flush(cx) + } + + fn poll_shutdown( + mut self: Pin<&mut Self>, + cx: &mut Context<'_>, + ) -> Poll> { + Pin::new(&mut self.io).poll_shutdown(cx) + } + + fn poll_write_vectored( + mut self: Pin<&mut Self>, + cx: &mut Context<'_>, + bufs: &[io::IoSlice<'_>], + ) -> Poll> { + match futures::ready!(Pin::new(&mut self.io).poll_write_vectored(cx, bufs)) { + Err(error) => Poll::Ready(Err(error)), + Ok(nwritten) => { + self.bandwidth_sink.increase_outbound(nwritten); + Poll::Ready(Ok(nwritten)) + } + } + } + + fn is_write_vectored(&self) -> bool { + self.io.is_write_vectored() + } +} diff --git a/client/litep2p/src/transport/webrtc/config.rs b/client/litep2p/src/transport/webrtc/config.rs new file mode 100644 index 00000000..b9314010 --- /dev/null +++ b/client/litep2p/src/transport/webrtc/config.rs @@ -0,0 +1,46 @@ +// Copyright 2023 litep2p developers +// +// Permission is hereby granted, free of charge, to any person obtaining a +// copy of this software and associated documentation files (the "Software"), +// to deal in the Software without restriction, including without limitation +// the rights to use, copy, modify, merge, publish, distribute, sublicense, +// and/or sell copies of the Software, and to permit persons to whom the +// Software is furnished to do so, subject to the following conditions: +// +// The above copyright notice and this permission notice shall be included in +// all copies or substantial portions of the Software. +// +// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS +// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE +// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER +// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING +// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER +// DEALINGS IN THE SOFTWARE. + +//! WebRTC transport configuration. + +use multiaddr::Multiaddr; + +/// WebRTC transport configuration. +#[derive(Debug)] +pub struct Config { + /// WebRTC listening address. + pub listen_addresses: Vec, + + /// Connection datagram buffer size. + /// + /// How many datagrams can the buffer between `WebRtcTransport` and a connection handler hold. + pub datagram_buffer_size: usize, +} + +impl Default for Config { + fn default() -> Self { + Self { + listen_addresses: vec!["/ip4/127.0.0.1/udp/8888/webrtc-direct" + .parse() + .expect("valid multiaddress")], + datagram_buffer_size: 2048, + } + } +} diff --git a/client/litep2p/src/transport/webrtc/connection.rs b/client/litep2p/src/transport/webrtc/connection.rs new file mode 100644 index 00000000..f0152016 --- /dev/null +++ b/client/litep2p/src/transport/webrtc/connection.rs @@ -0,0 +1,867 @@ +// Copyright 2023 litep2p developers +// +// Permission is hereby granted, free of charge, to any person obtaining a +// copy of this software and associated documentation files (the "Software"), +// to deal in the Software without restriction, including without limitation +// the rights to use, copy, modify, merge, publish, distribute, sublicense, +// and/or sell copies of the Software, and to permit persons to whom the +// Software is furnished to do so, subject to the following conditions: +// +// The above copyright notice and this permission notice shall be included in +// all copies or substantial portions of the Software. +// +// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS +// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE +// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER +// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING +// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER +// DEALINGS IN THE SOFTWARE. + +use crate::{ + error::{Error, ParseError, SubstreamError}, + multistream_select::{ + webrtc_listener_negotiate, HandshakeResult, ListenerSelectResult, WebRtcDialerState, + }, + protocol::{Direction, Permit, ProtocolCommand, ProtocolSet, SubstreamKeepAlive}, + substream::Substream, + transport::{ + webrtc::{ + schema::webrtc::message::Flag, + substream::{Event as SubstreamEvent, Substream as WebRtcSubstream, SubstreamHandle}, + util::WebRtcMessage, + }, + Endpoint, + }, + types::{protocol::ProtocolName, SubstreamId}, + PeerId, +}; + +use futures::{Stream, StreamExt}; +use indexmap::IndexMap; +use str0m::{ + channel::{ChannelConfig, ChannelId}, + net::{Protocol as Str0mProtocol, Receive}, + Event, IceConnectionState, Input, Output, Rtc, +}; +use tokio::{net::UdpSocket, sync::mpsc::Receiver}; + +use std::{ + collections::HashMap, + net::SocketAddr, + pin::Pin, + sync::Arc, + task::{Context, Poll}, + time::Instant, +}; + +/// Logging target for the file. +const LOG_TARGET: &str = "litep2p::webrtc::connection"; + +/// Opening channel context. +#[derive(Debug)] +struct ChannelContext { + /// Protocol name. + protocol: ProtocolName, + + /// Fallback names. + fallback_names: Vec, + + /// Substream ID. + substream_id: SubstreamId, + + /// Permit which keeps the connection open while we are opening a substream. Must be returned + /// to [`TransportService`](crate::protocol::TransportService), where it can be safely dropped + /// after upgrading the connection. + opening_permit: Permit, + + /// Whether this substream should keep the connection alive while it exists, i.e., whether it + /// should store the permit entioned above for the lifetime of the substream. + keep_alive: SubstreamKeepAlive, +} + +/// Set of [`SubstreamHandle`]s. +struct SubstreamHandleSet { + /// Current index. + index: usize, + + /// Substream handles. + handles: IndexMap, +} + +impl SubstreamHandleSet { + /// Create new [`SubstreamHandleSet`]. + pub fn new() -> Self { + Self { + index: 0usize, + handles: IndexMap::new(), + } + } + + /// Get mutable access to `SubstreamHandle`. + pub fn get_mut(&mut self, key: &ChannelId) -> Option<&mut SubstreamHandle> { + self.handles.get_mut(key) + } + + /// Insert new handle to [`SubstreamHandleSet`]. + pub fn insert(&mut self, key: ChannelId, handle: SubstreamHandle) { + assert!(self.handles.insert(key, handle).is_none()); + } + + /// Remove handle from [`SubstreamHandleSet`]. + pub fn remove(&mut self, key: &ChannelId) -> Option { + self.handles.shift_remove(key) + } +} + +impl Stream for SubstreamHandleSet { + type Item = (ChannelId, Option); + + fn poll_next(mut self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll> { + let len = match self.handles.len() { + 0 => return Poll::Pending, + len => len, + }; + let start_index = self.index; + + loop { + let index = self.index % len; + self.index += 1; + + let (key, stream) = self.handles.get_index_mut(index).expect("handle to exist"); + match stream.poll_next_unpin(cx) { + Poll::Pending => {} + Poll::Ready(event) => return Poll::Ready(Some((*key, event))), + } + + if self.index == start_index + len { + break Poll::Pending; + } + } + } +} + +/// Channel state. +#[derive(Debug)] +enum ChannelState { + /// Channel is closing. + Closing, + + /// Inbound channel is opening. + InboundOpening, + + /// Outbound channel is opening. + OutboundOpening { + /// Channel context. + context: ChannelContext, + + /// `multistream-select` dialer state. + dialer_state: WebRtcDialerState, + }, + + /// Channel is open. + Open { + /// Substream ID. + substream_id: SubstreamId, + + /// Channel ID. + channel_id: ChannelId, + + /// Connection permit if this substream needs to keep connection open. + lifetime_permit: Option, + }, +} + +/// WebRTC connection. +pub struct WebRtcConnection { + /// `str0m` WebRTC object. + rtc: Rtc, + + /// Protocol set. + protocol_set: ProtocolSet, + + /// Remote peer ID. + peer: PeerId, + + /// Endpoint. + endpoint: Endpoint, + + /// Peer address + peer_address: SocketAddr, + + /// Local address. + local_address: SocketAddr, + + /// Transport socket. + socket: Arc, + + /// RX channel for receiving datagrams from the transport. + dgram_rx: Receiver>, + + /// Pending outbound channels. + pending_outbound: HashMap, + + /// Open channels. + channels: HashMap, + + /// Substream handles. + handles: SubstreamHandleSet, +} + +impl WebRtcConnection { + /// Create new [`WebRtcConnection`]. + pub fn new( + rtc: Rtc, + peer: PeerId, + peer_address: SocketAddr, + local_address: SocketAddr, + socket: Arc, + protocol_set: ProtocolSet, + endpoint: Endpoint, + dgram_rx: Receiver>, + ) -> Self { + Self { + rtc, + protocol_set, + peer, + peer_address, + local_address, + socket, + endpoint, + dgram_rx, + pending_outbound: HashMap::new(), + channels: HashMap::new(), + handles: SubstreamHandleSet::new(), + } + } + + /// Handle opened channel. + /// + /// If the channel is inbound, nothing is done because we have to wait for data + /// `multistream-select` handshake to be received from remote peer before anything + /// else can be done. + /// + /// If the channel is outbound, send `multistream-select` handshake to remote peer. + async fn on_channel_opened( + &mut self, + channel_id: ChannelId, + channel_name: String, + ) -> crate::Result<()> { + tracing::trace!( + target: LOG_TARGET, + peer = ?self.peer, + ?channel_id, + ?channel_name, + "channel opened", + ); + + let Some(mut context) = self.pending_outbound.remove(&channel_id) else { + tracing::trace!( + target: LOG_TARGET, + peer = ?self.peer, + ?channel_id, + "inbound channel opened, wait for `multistream-select` message", + ); + + self.channels.insert(channel_id, ChannelState::InboundOpening); + return Ok(()); + }; + + let fallback_names = std::mem::take(&mut context.fallback_names); + let (dialer_state, message) = + WebRtcDialerState::propose(context.protocol.clone(), fallback_names)?; + let message = WebRtcMessage::encode(message, None); + + self.rtc + .channel(channel_id) + .ok_or(Error::ChannelDoesntExist)? + .write(true, message.as_ref()) + .map_err(Error::WebRtc)?; + + self.channels.insert( + channel_id, + ChannelState::OutboundOpening { + context, + dialer_state, + }, + ); + + Ok(()) + } + + /// Handle closed channel. + async fn on_channel_closed(&mut self, channel_id: ChannelId) -> crate::Result<()> { + tracing::trace!( + target: LOG_TARGET, + peer = ?self.peer, + ?channel_id, + "channel closed", + ); + + self.pending_outbound.remove(&channel_id); + self.channels.remove(&channel_id); + self.handles.remove(&channel_id); + + Ok(()) + } + + /// Handle data received to an opening inbound channel. + /// + /// The first message received over an inbound channel is the `multistream-select` handshake. + /// This handshake contains the protocol (and potentially fallbacks for that protocol) that + /// remote peer wants to use for this channel. Parse the handshake and check if any of the + /// proposed protocols are supported by the local node. If not, send rejection to remote peer + /// and close the channel. If the local node supports one of the protocols, send confirmation + /// for the protocol to remote peer and report an opened substream to the selected protocol. + async fn on_inbound_opening_channel_data( + &mut self, + channel_id: ChannelId, + data: Vec, + ) -> crate::Result<(SubstreamId, SubstreamHandle, Option)> { + tracing::trace!( + target: LOG_TARGET, + peer = ?self.peer, + ?channel_id, + "handle opening inbound substream", + ); + + let payload = WebRtcMessage::decode(&data)?.payload.ok_or(Error::InvalidData)?; + let protocols = self.protocol_set.protocols_with_keep_alives(); + let protocol_names = protocols.keys().cloned().collect(); + let (response, negotiated) = + match webrtc_listener_negotiate(protocol_names, payload.into())? { + ListenerSelectResult::Accepted { protocol, message } => (message, Some(protocol)), + ListenerSelectResult::Rejected { message } => (message, None), + }; + + self.rtc + .channel(channel_id) + .ok_or(Error::ChannelDoesntExist)? + .write( + true, + WebRtcMessage::encode(response.to_vec(), None).as_ref(), + ) + .map_err(Error::WebRtc)?; + + let protocol = negotiated.ok_or(Error::SubstreamDoesntExist)?; + let substream_id = self.protocol_set.next_substream_id(); + let codec = self.protocol_set.protocol_codec(&protocol); + let opening_permit = self.protocol_set.try_get_permit().ok_or(Error::ConnectionClosed)?; + let (substream, handle) = WebRtcSubstream::new(); + let substream = Substream::new_webrtc(self.peer, substream_id, substream, codec); + let keep_alive = + protocols.get(&protocol).expect("negotiated protocol to be one of the keys"); + let lifetime_permit = keep_alive.then(|| opening_permit.clone()); + + tracing::trace!( + target: LOG_TARGET, + peer = ?self.peer, + ?channel_id, + ?substream_id, + ?protocol, + "inbound substream opened", + ); + + self.protocol_set + .report_substream_open( + self.peer, + protocol.clone(), + Direction::Inbound, + substream, + opening_permit, + ) + .await + .map(|_| (substream_id, handle, lifetime_permit)) + .map_err(Into::into) + } + + /// Handle data received to an opening outbound channel. + /// + /// When an outbound channel is opened, the first message the local node sends it the + /// `multistream-select` handshake which contains the protocol (and any fallbacks for that + /// protocol) that the local node wants to use to negotiate for the channel. When a message is + /// received from a remote peer for a channel in state [`ChannelState::OutboundOpening`], parse + /// the `multistream-select` handshake response. The response either contains a rejection which + /// causes the substream to be closed, a partial response, or a full response. If a partial + /// response is heard, e.g., only the header line is received, the handshake cannot be concluded + /// and the channel is placed back in the [`ChannelState::OutboundOpening`] state to wait for + /// the rest of the handshake. If a full response is received (or rest of the partial response), + /// the protocol confirmation is verified and the substream is reported to the protocol. + /// + /// If the substream fails to open for whatever reason, since this is an outbound substream, + /// the protocol is notified of the failure. + async fn on_outbound_opening_channel_data( + &mut self, + channel_id: ChannelId, + data: Vec, + mut dialer_state: WebRtcDialerState, + context: ChannelContext, + ) -> Result, SubstreamError> { + tracing::trace!( + target: LOG_TARGET, + peer = ?self.peer, + ?channel_id, + data_len = ?data.len(), + "handle opening outbound substream", + ); + + let rtc_message = WebRtcMessage::decode(&data) + .map_err(|err| SubstreamError::NegotiationError(err.into()))?; + let message = rtc_message.payload.ok_or(SubstreamError::NegotiationError( + ParseError::InvalidData.into(), + ))?; + + let HandshakeResult::Succeeded(protocol) = dialer_state.register_response(message)? else { + tracing::trace!( + target: LOG_TARGET, + peer = ?self.peer, + ?channel_id, + "multistream-select handshake not ready", + ); + + self.channels.insert( + channel_id, + ChannelState::OutboundOpening { + context, + dialer_state, + }, + ); + + return Ok(None); + }; + + let ChannelContext { + substream_id, + opening_permit, + .. + } = context; + let codec = self.protocol_set.protocol_codec(&protocol); + let (substream, handle) = WebRtcSubstream::new(); + let substream = Substream::new_webrtc(self.peer, substream_id, substream, codec); + + tracing::trace!( + target: LOG_TARGET, + peer = ?self.peer, + ?channel_id, + ?substream_id, + ?protocol, + "outbound substream opened", + ); + + self.protocol_set + .report_substream_open( + self.peer, + protocol.clone(), + Direction::Outbound(substream_id), + substream, + opening_permit, + ) + .await + .map(|_| Some((substream_id, handle))) + } + + /// Handle data received from an open channel. + async fn on_open_channel_data( + &mut self, + channel_id: ChannelId, + data: Vec, + ) -> crate::Result<()> { + let message = WebRtcMessage::decode(&data)?; + + tracing::trace!( + target: LOG_TARGET, + peer = ?self.peer, + ?channel_id, + flag = ?message.flag, + data_len = message.payload.as_ref().map_or(0usize, |payload| payload.len()), + "handle inbound message", + ); + + self.handles + .get_mut(&channel_id) + .ok_or_else(|| { + tracing::warn!( + target: LOG_TARGET, + peer = ?self.peer, + ?channel_id, + "data received from an unknown channel", + ); + debug_assert!(false); + Error::InvalidState + })? + .on_message(message) + .await + } + + /// Handle data received from a channel. + async fn on_inbound_data(&mut self, channel_id: ChannelId, data: Vec) -> crate::Result<()> { + let Some(state) = self.channels.remove(&channel_id) else { + tracing::warn!( + target: LOG_TARGET, + peer = ?self.peer, + ?channel_id, + "data received over a channel that doesn't exist", + ); + debug_assert!(false); + return Err(Error::InvalidState); + }; + + match state { + ChannelState::InboundOpening => { + match self.on_inbound_opening_channel_data(channel_id, data).await { + Ok((substream_id, handle, lifetime_permit)) => { + self.handles.insert(channel_id, handle); + self.channels.insert( + channel_id, + ChannelState::Open { + substream_id, + channel_id, + lifetime_permit, + }, + ); + } + Err(error) => { + tracing::debug!( + target: LOG_TARGET, + peer = ?self.peer, + ?channel_id, + ?error, + "failed to handle opening inbound substream", + ); + + self.channels.insert(channel_id, ChannelState::Closing); + self.rtc.direct_api().close_data_channel(channel_id); + } + } + } + ChannelState::OutboundOpening { + context, + dialer_state, + } => { + let protocol = context.protocol.clone(); + let substream_id = context.substream_id; + let lifetime_permit = context.keep_alive.then(|| context.opening_permit.clone()); + + match self + .on_outbound_opening_channel_data(channel_id, data, dialer_state, context) + .await + { + Ok(Some((substream_id, handle))) => { + self.handles.insert(channel_id, handle); + self.channels.insert( + channel_id, + ChannelState::Open { + substream_id, + channel_id, + lifetime_permit, + }, + ); + } + Ok(None) => {} + Err(error) => { + tracing::debug!( + target: LOG_TARGET, + peer = ?self.peer, + ?channel_id, + ?error, + "failed to handle opening outbound substream", + ); + + let _ = self + .protocol_set + .report_substream_open_failure(protocol, substream_id, error) + .await; + + self.rtc.direct_api().close_data_channel(channel_id); + self.channels.insert(channel_id, ChannelState::Closing); + } + } + } + ChannelState::Open { + substream_id, + channel_id, + lifetime_permit, + } => match self.on_open_channel_data(channel_id, data).await { + Ok(()) => { + self.channels.insert( + channel_id, + ChannelState::Open { + substream_id, + channel_id, + lifetime_permit, + }, + ); + } + Err(error) => { + tracing::debug!( + target: LOG_TARGET, + peer = ?self.peer, + ?channel_id, + ?error, + "failed to handle data for an open channel", + ); + + self.rtc.direct_api().close_data_channel(channel_id); + self.channels.insert(channel_id, ChannelState::Closing); + } + }, + ChannelState::Closing => { + tracing::debug!( + target: LOG_TARGET, + peer = ?self.peer, + ?channel_id, + "channel closing, discarding received data", + ); + self.channels.insert(channel_id, ChannelState::Closing); + } + } + + Ok(()) + } + + /// Handle outbound data with optional flag. + fn on_outbound_data( + &mut self, + channel_id: ChannelId, + data: Vec, + flag: Option, + ) -> crate::Result<()> { + tracing::trace!( + target: LOG_TARGET, + peer = ?self.peer, + ?channel_id, + data_len = ?data.len(), + ?flag, + "send data", + ); + + self.rtc + .channel(channel_id) + .ok_or(Error::ChannelDoesntExist)? + .write(true, WebRtcMessage::encode(data, flag).as_ref()) + .map_err(Error::WebRtc) + .map(|_| ()) + } + + /// Open outbound substream. + fn on_open_substream( + &mut self, + protocol: ProtocolName, + fallback_names: Vec, + substream_id: SubstreamId, + opening_permit: Permit, + keep_alive: SubstreamKeepAlive, + ) { + let channel_id = self.rtc.direct_api().create_data_channel(ChannelConfig { + label: "".to_string(), + ordered: false, + reliability: Default::default(), + negotiated: None, + protocol: protocol.to_string(), + }); + + tracing::trace!( + target: LOG_TARGET, + peer = ?self.peer, + ?channel_id, + ?substream_id, + ?protocol, + ?fallback_names, + "open data channel", + ); + + self.pending_outbound.insert( + channel_id, + ChannelContext { + protocol, + fallback_names, + substream_id, + opening_permit, + keep_alive, + }, + ); + } + + /// Connection to peer has been closed. + async fn on_connection_closed(&mut self) { + tracing::trace!( + target: LOG_TARGET, + peer = ?self.peer, + "connection closed", + ); + + let _ = self + .protocol_set + .report_connection_closed(self.peer, self.endpoint.connection_id()) + .await; + } + + /// Start the connection event loop without notifying protocols. + pub async fn run_event_loop(mut self) { + loop { + // poll output until we get a timeout + let timeout = match self.rtc.poll_output().unwrap() { + Output::Timeout(v) => v, + Output::Transmit(v) => { + tracing::trace!( + target: LOG_TARGET, + peer = ?self.peer, + datagram_len = ?v.contents.len(), + "transmit data", + ); + + self.socket.try_send_to(&v.contents, v.destination).unwrap(); + continue; + } + Output::Event(v) => match v { + Event::IceConnectionStateChange(IceConnectionState::Disconnected) => { + tracing::trace!( + target: LOG_TARGET, + peer = ?self.peer, + "ice connection state changed to closed", + ); + return self.on_connection_closed().await; + } + Event::ChannelOpen(channel_id, name) => { + if let Err(error) = self.on_channel_opened(channel_id, name).await { + tracing::debug!( + target: LOG_TARGET, + peer = ?self.peer, + ?channel_id, + ?error, + "failed to handle opened channel", + ); + } + + continue; + } + Event::ChannelClose(channel_id) => { + if let Err(error) = self.on_channel_closed(channel_id).await { + tracing::debug!( + target: LOG_TARGET, + peer = ?self.peer, + ?channel_id, + ?error, + "failed to handle closed channel", + ); + } + + continue; + } + Event::ChannelData(info) => { + if let Err(error) = self.on_inbound_data(info.id, info.data).await { + tracing::debug!( + target: LOG_TARGET, + peer = ?self.peer, + channel_id = ?info.id, + ?error, + "failed to handle channel data", + ); + } + + continue; + } + event => { + tracing::debug!( + target: LOG_TARGET, + peer = ?self.peer, + ?event, + "unhandled event", + ); + continue; + } + }, + }; + + let duration = timeout - Instant::now(); + if duration.is_zero() { + self.rtc.handle_input(Input::Timeout(Instant::now())).unwrap(); + continue; + } + + tokio::select! { + biased; + datagram = self.dgram_rx.recv() => match datagram { + Some(datagram) => { + let input = Input::Receive( + Instant::now(), + Receive { + proto: Str0mProtocol::Udp, + source: self.peer_address, + destination: self.local_address, + contents: datagram.as_slice().try_into().unwrap(), + }, + ); + + self.rtc.handle_input(input).unwrap(); + } + None => { + tracing::trace!( + target: LOG_TARGET, + peer = ?self.peer, + "read `None` from `dgram_rx`", + ); + return self.on_connection_closed().await; + } + }, + event = self.handles.next() => match event { + None => unreachable!(), + Some((channel_id, None)) => { + tracing::trace!( + target: LOG_TARGET, + peer = ?self.peer, + ?channel_id, + "channel closed", + ); + + self.rtc.direct_api().close_data_channel(channel_id); + self.channels.insert(channel_id, ChannelState::Closing); + self.handles.remove(&channel_id); + } + Some((channel_id, Some(SubstreamEvent::Message { payload, flag }))) => { + if let Err(error) = self.on_outbound_data(channel_id, payload, flag) { + tracing::debug!( + target: LOG_TARGET, + ?channel_id, + ?flag, + ?error, + "failed to send data to remote peer", + ); + } + } + Some((_, Some(SubstreamEvent::RecvClosed))) => {} + }, + command = self.protocol_set.next() => match command { + None | Some(ProtocolCommand::ForceClose) => { + tracing::trace!( + target: LOG_TARGET, + peer = ?self.peer, + ?command, + "`ProtocolSet` instructed to close connection", + ); + return self.on_connection_closed().await; + } + Some(ProtocolCommand::OpenSubstream { + protocol, + fallback_names, + substream_id, + permit, + keep_alive, + connection_id: _, + }) => { + self.on_open_substream( + protocol, + fallback_names, + substream_id, + permit, + keep_alive, + ); + } + }, + _ = tokio::time::sleep(duration) => { + self.rtc.handle_input(Input::Timeout(Instant::now())).unwrap(); + } + } + } + } +} diff --git a/client/litep2p/src/transport/webrtc/mod.rs b/client/litep2p/src/transport/webrtc/mod.rs new file mode 100644 index 00000000..a82959ca --- /dev/null +++ b/client/litep2p/src/transport/webrtc/mod.rs @@ -0,0 +1,821 @@ +// Copyright 2023 litep2p developers +// +// Permission is hereby granted, free of charge, to any person obtaining a +// copy of this software and associated documentation files (the "Software"), +// to deal in the Software without restriction, including without limitation +// the rights to use, copy, modify, merge, publish, distribute, sublicense, +// and/or sell copies of the Software, and to permit persons to whom the +// Software is furnished to do so, subject to the following conditions: +// +// The above copyright notice and this permission notice shall be included in +// all copies or substantial portions of the Software. +// +// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS +// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE +// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER +// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING +// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER +// DEALINGS IN THE SOFTWARE. + +//! WebRTC transport. + +use crate::{ + error::{AddressError, Error}, + transport::{ + manager::TransportHandle, + webrtc::{config::Config, connection::WebRtcConnection, opening::OpeningWebRtcConnection}, + Endpoint, Transport, TransportBuilder, TransportEvent, + }, + types::ConnectionId, + PeerId, +}; + +use futures::{future::BoxFuture, Future, Stream}; +use futures_timer::Delay; +use hickory_resolver::TokioResolver; +use multiaddr::{multihash::Multihash, Multiaddr, Protocol}; +use socket2::{Domain, Socket, Type}; +use str0m::{ + channel::{ChannelConfig, ChannelId}, + config::{CryptoProvider, DtlsCert, DtlsCertOptions}, + ice::IceCreds, + net::{DatagramRecv, Protocol as Str0mProtocol, Receive}, + Candidate, DtlsCertConfig, Input, Rtc, +}; + +use tokio::{ + io::ReadBuf, + net::UdpSocket, + sync::mpsc::{channel, error::TrySendError, Sender}, +}; + +use std::{ + collections::{hash_map::Entry, HashMap, VecDeque}, + net::{IpAddr, SocketAddr}, + pin::Pin, + sync::Arc, + task::{Context, Poll}, + time::{Duration, Instant}, +}; + +pub(crate) use substream::Substream; + +mod connection; +mod opening; +mod substream; +mod util; + +pub mod config; + +pub(super) mod schema { + pub(super) mod webrtc { + include!(concat!(env!("OUT_DIR"), "/webrtc.rs")); + } + + pub(super) mod noise { + include!(concat!(env!("OUT_DIR"), "/noise.rs")); + } +} + +/// Logging target for the file. +const LOG_TARGET: &str = "litep2p::webrtc"; + +/// Hardcoded remote fingerprint. +const REMOTE_FINGERPRINT: &str = + "sha-256 FF:FF:FF:FF:FF:FF:FF:FF:FF:FF:FF:FF:FF:FF:FF:FF:FF:FF:FF:FF:FF:FF:FF:FF:FF:FF:FF:FF:FF:FF:FF:FF"; + +/// Connection context. +struct ConnectionContext { + /// Remote peer ID. + peer: PeerId, + + /// Connection ID. + connection_id: ConnectionId, + + /// TX channel for sending datagrams to the connection event loop. + tx: Sender>, +} + +/// Events received from opening connections that are handled +/// by the [`WebRtcTransport`] event loop. +enum ConnectionEvent { + /// Connection established. + ConnectionEstablished { + /// Remote peer ID. + peer: PeerId, + + /// Endpoint. + endpoint: Endpoint, + }, + + /// Connection to peer closed. + ConnectionClosed, + + /// Timeout. + Timeout { + /// Timeout duration. + duration: Duration, + }, +} + +/// WebRTC transport. +pub(crate) struct WebRtcTransport { + /// Transport context. + context: TransportHandle, + + /// UDP socket. + socket: Arc, + + /// DTLS certificate. + dtls_cert: DtlsCert, + + /// Assigned listen addresss. + listen_address: SocketAddr, + + /// Datagram buffer size. + datagram_buffer_size: usize, + + /// Connected peers. + open: HashMap, + + /// OpeningWebRtc connections. + opening: HashMap, + + /// `ConnectionId -> SocketAddr` mappings. + connections: HashMap, + + /// Pending timeouts. + timeouts: HashMap>, + + /// Pending events. + pending_events: VecDeque, +} + +impl WebRtcTransport { + /// Extract socket address and `PeerId`, if found, from `address`. + fn get_socket_address(address: &Multiaddr) -> crate::Result<(SocketAddr, Option)> { + tracing::trace!(target: LOG_TARGET, ?address, "parse multi address"); + + let mut iter = address.iter(); + let socket_address = match iter.next() { + Some(Protocol::Ip6(address)) => match iter.next() { + Some(Protocol::Udp(port)) => SocketAddr::new(IpAddr::V6(address), port), + protocol => { + tracing::error!( + target: LOG_TARGET, + ?protocol, + "invalid transport protocol, expected `Upd`", + ); + return Err(Error::AddressError(AddressError::InvalidProtocol)); + } + }, + Some(Protocol::Ip4(address)) => match iter.next() { + Some(Protocol::Udp(port)) => SocketAddr::new(IpAddr::V4(address), port), + protocol => { + tracing::error!( + target: LOG_TARGET, + ?protocol, + "invalid transport protocol, expected `Udp`", + ); + return Err(Error::AddressError(AddressError::InvalidProtocol)); + } + }, + protocol => { + tracing::error!(target: LOG_TARGET, ?protocol, "invalid transport protocol"); + return Err(Error::AddressError(AddressError::InvalidProtocol)); + } + }; + + match iter.next() { + Some(Protocol::WebRTC) => {} + protocol => { + tracing::error!( + target: LOG_TARGET, + ?protocol, + "invalid protocol, expected `WebRTC`" + ); + return Err(Error::AddressError(AddressError::InvalidProtocol)); + } + } + + let maybe_peer = match iter.next() { + Some(Protocol::P2p(multihash)) => Some(PeerId::from_multihash(multihash)?), + None => None, + protocol => { + tracing::error!( + target: LOG_TARGET, + ?protocol, + "invalid protocol, expected `P2p` or `None`" + ); + return Err(Error::AddressError(AddressError::InvalidProtocol)); + } + }; + + Ok((socket_address, maybe_peer)) + } + + /// Create RTC client and open channel for Noise handshake. + fn make_rtc_client( + &self, + ufrag: &str, + pass: &str, + source: SocketAddr, + destination: SocketAddr, + ) -> (Rtc, ChannelId) { + let mut rtc = Rtc::builder() + .set_ice_lite(true) + .set_dtls_cert_config(DtlsCertConfig::PregeneratedCert(self.dtls_cert.clone())) + .set_fingerprint_verification(false) + .build(); + rtc.add_local_candidate(Candidate::host(destination, Str0mProtocol::Udp).unwrap()); + rtc.add_remote_candidate(Candidate::host(source, Str0mProtocol::Udp).unwrap()); + rtc.direct_api() + .set_remote_fingerprint(REMOTE_FINGERPRINT.parse().expect("parse() to succeed")); + rtc.direct_api().set_remote_ice_credentials(IceCreds { + ufrag: ufrag.to_owned(), + pass: pass.to_owned(), + }); + rtc.direct_api().set_local_ice_credentials(IceCreds { + ufrag: ufrag.to_owned(), + pass: pass.to_owned(), + }); + rtc.direct_api().set_ice_controlling(false); + rtc.direct_api().start_dtls(false).unwrap(); + rtc.direct_api().start_sctp(false); + + let noise_channel_id = rtc.direct_api().create_data_channel(ChannelConfig { + label: "noise".to_string(), + ordered: false, + reliability: Default::default(), + negotiated: Some(0), + protocol: "".to_string(), + }); + + (rtc, noise_channel_id) + } + + /// Poll opening connection. + fn poll_connection(&mut self, source: &SocketAddr) -> ConnectionEvent { + let Some(connection) = self.opening.get_mut(source) else { + tracing::warn!( + target: LOG_TARGET, + ?source, + "connection doesn't exist", + ); + return ConnectionEvent::ConnectionClosed; + }; + + loop { + match connection.poll_process() { + opening::WebRtcEvent::Timeout { timeout } => { + let duration = timeout - Instant::now(); + + match duration.is_zero() { + true => match connection.on_timeout() { + Ok(()) => continue, + Err(error) => { + tracing::debug!( + target: LOG_TARGET, + ?source, + ?error, + "failed to handle timeout", + ); + + return ConnectionEvent::ConnectionClosed; + } + }, + false => return ConnectionEvent::Timeout { duration }, + } + } + opening::WebRtcEvent::Transmit { + destination, + datagram, + } => + if let Err(error) = self.socket.try_send_to(&datagram, destination) { + tracing::warn!( + target: LOG_TARGET, + ?source, + ?error, + "failed to send datagram", + ); + }, + opening::WebRtcEvent::ConnectionClosed => return ConnectionEvent::ConnectionClosed, + opening::WebRtcEvent::ConnectionOpened { peer, endpoint } => { + return ConnectionEvent::ConnectionEstablished { peer, endpoint }; + } + } + } + } + + /// Handle socket input. + /// + /// If the datagram was received from an active client, it's dispatched to the connection + /// handler, if there is space in the queue. If the datagram opened a new connection or it + /// belonged to a client who is opening, the event loop is instructed to poll the client + /// until it timeouts. + /// + /// Returns `true` if the client should be polled. + fn on_socket_input(&mut self, source: SocketAddr, buffer: Vec) -> crate::Result { + if let Entry::Occupied(mut entry) = self.open.entry(source) { + let ConnectionContext { + peer, + connection_id, + tx, + } = entry.get_mut(); + + match tx.try_send(buffer) { + Ok(_) => return Ok(false), + Err(TrySendError::Full(_)) => { + tracing::warn!( + target: LOG_TARGET, + ?source, + ?peer, + ?connection_id, + "channel full, dropping datagram", + ); + + return Ok(false); + } + Err(TrySendError::Closed(_)) => { + tracing::debug!( + target: LOG_TARGET, + ?source, + ?peer, + ?connection_id, + "connection closed, removing stale entry", + ); + + entry.remove(); + return Ok(false); + } + } + } + + if buffer.is_empty() { + // str0m crate panics if the buffer doesn't contain at least one byte: + // https://github.com/algesten/str0m/blob/2c5dc8ee8ddead08699dd6852a27476af6992a5c/src/io/mod.rs#L222 + return Err(Error::InvalidData); + } + + // if the peer doesn't exist, decode the message and expect to receive `Stun` + // so that a new connection can be initialized + let contents: DatagramRecv = + buffer.as_slice().try_into().map_err(|_| Error::InvalidData)?; + + // Handle non stun packets. + if !is_stun_packet(&buffer) { + tracing::debug!( + target: LOG_TARGET, + ?source, + "received non-stun message" + ); + + match self.opening.get_mut(&source) { + Some(connection) => + if let Err(error) = connection.on_input(contents) { + tracing::error!( + target: LOG_TARGET, + ?error, + ?source, + "failed to handle inbound datagram" + ); + }, + None => { + tracing::warn!( + target: LOG_TARGET, + ?source, + "received non-stun message from unknown peer", + ); + return Err(Error::InvalidData); + } + }; + + return Ok(true); + } + + let stun_message = + str0m::ice::StunMessage::parse(&buffer).map_err(|_| Error::InvalidData)?; + let Some((ufrag, pass)) = stun_message.split_username() else { + tracing::warn!( + target: LOG_TARGET, + ?source, + "failed to split username/password", + ); + return Err(Error::InvalidData); + }; + + tracing::debug!( + target: LOG_TARGET, + ?source, + ?ufrag, + ?pass, + "received stun message" + ); + + // create new `Rtc` object for the peer and give it the received STUN message + let (mut rtc, noise_channel_id) = + self.make_rtc_client(ufrag, pass, source, self.socket.local_addr().unwrap()); + + rtc.handle_input(Input::Receive( + Instant::now(), + Receive { + source, + proto: Str0mProtocol::Udp, + destination: self.socket.local_addr().unwrap(), + contents, + }, + )) + .expect("client to handle input successfully"); + + let connection_id = self.context.next_connection_id(); + let connection = OpeningWebRtcConnection::new( + rtc, + connection_id, + noise_channel_id, + self.context.keypair.clone(), + source, + self.listen_address, + ); + self.opening.insert(source, connection); + + Ok(true) + } +} + +impl TransportBuilder for WebRtcTransport { + type Config = Config; + type Transport = WebRtcTransport; + + /// Create new [`Transport`] object. + fn new( + context: TransportHandle, + config: Self::Config, + _resolver: Arc, + ) -> crate::Result<(Self, Vec)> + where + Self: Sized, + { + tracing::info!( + target: LOG_TARGET, + listen_addresses = ?config.listen_addresses, + "start webrtc transport", + ); + + let (listen_address, _) = Self::get_socket_address(&config.listen_addresses[0])?; + + let socket = if listen_address.is_ipv4() { + let socket = Socket::new(Domain::IPV4, Type::DGRAM, Some(socket2::Protocol::UDP))?; + socket.bind(&listen_address.into())?; + socket + } else { + let socket = Socket::new(Domain::IPV6, Type::DGRAM, Some(socket2::Protocol::UDP))?; + socket.set_only_v6(true)?; + socket.bind(&listen_address.into())?; + socket + }; + + socket.set_reuse_address(true)?; + socket.set_nonblocking(true)?; + #[cfg(unix)] + socket.set_reuse_port(true)?; + + let socket = UdpSocket::from_std(socket.into())?; + let listen_address = socket.local_addr()?; + let dtls_cert = DtlsCert::new(CryptoProvider::OpenSsl, DtlsCertOptions::default()); + + let listen_multi_addresses = { + let fingerprint = dtls_cert.fingerprint().bytes; + + const MULTIHASH_SHA256_CODE: u64 = 0x12; + let certificate = Multihash::wrap(MULTIHASH_SHA256_CODE, &fingerprint) + .expect("fingerprint's len to be 32 bytes"); + + vec![Multiaddr::empty() + .with(Protocol::from(listen_address.ip())) + .with(Protocol::Udp(listen_address.port())) + .with(Protocol::WebRTC) + .with(Protocol::Certhash(certificate))] + }; + + Ok(( + Self { + context, + dtls_cert, + listen_address, + open: HashMap::new(), + opening: HashMap::new(), + connections: HashMap::new(), + socket: Arc::new(socket), + timeouts: HashMap::new(), + pending_events: VecDeque::new(), + datagram_buffer_size: config.datagram_buffer_size, + }, + listen_multi_addresses, + )) + } +} + +impl Transport for WebRtcTransport { + fn dial(&mut self, connection_id: ConnectionId, address: Multiaddr) -> crate::Result<()> { + tracing::warn!( + target: LOG_TARGET, + ?connection_id, + ?address, + "webrtc cannot dial", + ); + + debug_assert!(false); + Err(Error::NotSupported("webrtc cannot dial peers".to_string())) + } + + fn accept_pending(&mut self, connection_id: ConnectionId) -> crate::Result<()> { + tracing::trace!( + target: LOG_TARGET, + ?connection_id, + "webrtc cannot accept pending connections", + ); + + debug_assert!(false); + Err(Error::NotSupported( + "webrtc cannot accept pending connections".to_string(), + )) + } + + fn reject_pending(&mut self, connection_id: ConnectionId) -> crate::Result<()> { + tracing::trace!( + target: LOG_TARGET, + ?connection_id, + "webrtc cannot reject pending connections", + ); + + debug_assert!(false); + Err(Error::NotSupported( + "webrtc cannot reject pending connections".to_string(), + )) + } + + fn accept( + &mut self, + connection_id: ConnectionId, + ) -> crate::Result>> { + tracing::trace!( + target: LOG_TARGET, + ?connection_id, + "inbound connection accepted", + ); + + let (peer, source, endpoint) = + self.connections.remove(&connection_id).ok_or_else(|| { + tracing::warn!( + target: LOG_TARGET, + ?connection_id, + "pending connection doens't exist", + ); + + Error::InvalidState + })?; + + let connection = self.opening.remove(&source).ok_or_else(|| { + tracing::warn!( + target: LOG_TARGET, + ?connection_id, + "pending connection doens't exist", + ); + + Error::InvalidState + })?; + + let rtc = connection.on_accept()?; + let (tx, rx) = channel(self.datagram_buffer_size); + let mut protocol_set = self.context.protocol_set(connection_id); + let connection_id = endpoint.connection_id(); + let endpoint_clone = endpoint.clone(); + let executor = self.context.executor.clone(); + let socket = Arc::clone(&self.socket); + let listen_address = self.listen_address; + + self.open.insert( + source, + ConnectionContext { + tx, + peer, + connection_id, + }, + ); + + Ok(Box::pin(async move { + // First, notify all protocols about the connection establishment + protocol_set.report_connection_established(peer, endpoint_clone).await?; + + // After protocols are notified, create connection and spawn event loop + let connection = WebRtcConnection::new( + rtc, + peer, + source, + listen_address, + socket, + protocol_set, + endpoint, + rx, + ); + + executor.run(Box::pin(async move { + connection.run_event_loop().await; + })); + + Ok(()) + })) + } + + fn reject(&mut self, connection_id: ConnectionId) -> crate::Result<()> { + tracing::trace!( + target: LOG_TARGET, + ?connection_id, + "inbound connection rejected", + ); + + let (_, source, _) = self.connections.remove(&connection_id).ok_or_else(|| { + tracing::warn!( + target: LOG_TARGET, + ?connection_id, + "pending connection doens't exist", + ); + + Error::InvalidState + })?; + + self.opening + .remove(&source) + .ok_or_else(|| { + tracing::warn!( + target: LOG_TARGET, + ?connection_id, + "pending connection doens't exist", + ); + + Error::InvalidState + }) + .map(|_| ()) + } + + fn open( + &mut self, + _connection_id: ConnectionId, + _addresses: Vec, + ) -> crate::Result<()> { + Ok(()) + } + + fn negotiate(&mut self, _connection_id: ConnectionId) -> crate::Result<()> { + Ok(()) + } + + fn cancel(&mut self, _connection_id: ConnectionId) {} +} + +impl Stream for WebRtcTransport { + type Item = TransportEvent; + + fn poll_next(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll> { + let this = Pin::into_inner(self); + + if let Some(event) = this.pending_events.pop_front() { + return Poll::Ready(Some(event)); + } + + loop { + let mut buf = vec![0u8; 16384]; + let mut read_buf = ReadBuf::new(&mut buf); + + match this.socket.poll_recv_from(cx, &mut read_buf) { + Poll::Pending => break, + Poll::Ready(Err(error)) => { + tracing::info!( + target: LOG_TARGET, + ?error, + "webrtc udp socket closed", + ); + + return Poll::Ready(None); + } + Poll::Ready(Ok(source)) => { + let nread = read_buf.filled().len(); + buf.truncate(nread); + + match this.on_socket_input(source, buf) { + Ok(false) => {} + Ok(true) => loop { + match this.poll_connection(&source) { + ConnectionEvent::ConnectionEstablished { peer, endpoint } => { + this.connections.insert( + endpoint.connection_id(), + (peer, source, endpoint.clone()), + ); + + // keep polling the connection until it registers a timeout + this.pending_events.push_back( + TransportEvent::ConnectionEstablished { peer, endpoint }, + ); + } + ConnectionEvent::ConnectionClosed => { + this.opening.remove(&source); + this.timeouts.remove(&source); + + break; + } + ConnectionEvent::Timeout { duration } => { + this.timeouts.insert( + source, + Box::pin(async move { Delay::new(duration).await }), + ); + + break; + } + } + }, + Err(error) => { + tracing::debug!( + target: LOG_TARGET, + ?source, + ?error, + "failed to handle datagram", + ); + } + } + } + } + } + + // go over all pending timeouts to see if any of them have expired + // and if any of them have, poll the connection until it registers another timeout + let pending_events = this + .timeouts + .iter_mut() + .filter_map(|(source, mut delay)| match Pin::new(&mut delay).poll(cx) { + Poll::Pending => None, + Poll::Ready(_) => Some(*source), + }) + .collect::>() + .into_iter() + .filter_map(|source| { + let mut pending_event = None; + + loop { + match this.poll_connection(&source) { + ConnectionEvent::ConnectionEstablished { peer, endpoint } => { + this.connections + .insert(endpoint.connection_id(), (peer, source, endpoint.clone())); + + // keep polling the connection until it registers a timeout + pending_event = + Some(TransportEvent::ConnectionEstablished { peer, endpoint }); + } + ConnectionEvent::ConnectionClosed => { + this.opening.remove(&source); + return None; + } + ConnectionEvent::Timeout { duration } => { + this.timeouts.insert(source, Box::pin(Delay::new(duration))); + break; + } + } + } + + pending_event + }) + .collect::>(); + + this.timeouts.retain(|source, _| this.opening.contains_key(source)); + this.pending_events.extend(pending_events); + this.pending_events + .pop_front() + .map_or(Poll::Pending, |event| Poll::Ready(Some(event))) + } +} + +/// Check if the packet received is STUN. +/// +/// Extracted from the STUN RFC 5389 (): +/// All STUN messages MUST start with a 20-byte header followed by zero +/// or more Attributes. The STUN header contains a STUN message type, +/// magic cookie, transaction ID, and message length. +/// +/// ```ignore +/// 0 1 2 3 +/// 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 +/// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +/// |0 0| STUN Message Type | Message Length | +/// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +/// | Magic Cookie | +/// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +/// | | +/// | Transaction ID (96 bits) | +/// | | +/// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +/// ``` +fn is_stun_packet(bytes: &[u8]) -> bool { + const STUN_MAGIC_COOKIE: [u8; 4] = [0x21, 0x12, 0xA4, 0x42]; + // 20 bytes for the header, then follows attributes. + bytes.len() >= 20 && bytes[0] < 2 && bytes[4..8] == STUN_MAGIC_COOKIE +} diff --git a/client/litep2p/src/transport/webrtc/opening.rs b/client/litep2p/src/transport/webrtc/opening.rs new file mode 100644 index 00000000..f778ca84 --- /dev/null +++ b/client/litep2p/src/transport/webrtc/opening.rs @@ -0,0 +1,500 @@ +// Copyright 2023-2024 litep2p developers +// +// Permission is hereby granted, free of charge, to any person obtaining a +// copy of this software and associated documentation files (the "Software"), +// to deal in the Software without restriction, including without limitation +// the rights to use, copy, modify, merge, publish, distribute, sublicense, +// and/or sell copies of the Software, and to permit persons to whom the +// Software is furnished to do so, subject to the following conditions: +// +// The above copyright notice and this permission notice shall be included in +// all copies or substantial portions of the Software. +// +// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS +// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE +// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER +// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING +// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER +// DEALINGS IN THE SOFTWARE. + +//! WebRTC handshaking code for an opening connection. + +use crate::{ + config::Role, + crypto::{ed25519::Keypair, noise::NoiseContext}, + transport::{webrtc::util::WebRtcMessage, Endpoint}, + types::ConnectionId, + Error, PeerId, +}; + +use multiaddr::{multihash::Multihash, Multiaddr, Protocol}; +use str0m::{ + channel::ChannelId, + config::Fingerprint, + net::{DatagramRecv, DatagramSend, Protocol as Str0mProtocol, Receive}, + Event, IceConnectionState, Input, Output, Rtc, +}; + +use std::{net::SocketAddr, time::Instant}; + +/// Logging target for the file. +const LOG_TARGET: &str = "litep2p::webrtc::connection"; + +/// Create Noise prologue. +fn noise_prologue(local_fingerprint: Vec, remote_fingerprint: Vec) -> Vec { + const PREFIX: &[u8] = b"libp2p-webrtc-noise:"; + let mut prologue = + Vec::with_capacity(PREFIX.len() + local_fingerprint.len() + remote_fingerprint.len()); + prologue.extend_from_slice(PREFIX); + prologue.extend_from_slice(&remote_fingerprint); + prologue.extend_from_slice(&local_fingerprint); + + prologue +} + +/// WebRTC connection event. +#[derive(Debug)] +pub enum WebRtcEvent { + /// Register timeout for the connection. + Timeout { + /// Timeout. + timeout: Instant, + }, + + /// Transmit data to remote peer. + Transmit { + /// Destination. + destination: SocketAddr, + + /// Datagram to transmit. + datagram: DatagramSend, + }, + + /// Connection closed. + ConnectionClosed, + + /// Connection established. + ConnectionOpened { + /// Remote peer ID. + peer: PeerId, + + /// Endpoint. + endpoint: Endpoint, + }, +} + +/// Opening WebRTC connection. +/// +/// This object is used to track an opening connection which starts with a Noise handshake. +/// After the handshake is done, this object is destroyed and a new WebRTC connection object +/// is created which implements a normal connection event loop dealing with substreams. +pub struct OpeningWebRtcConnection { + /// WebRTC object + rtc: Rtc, + + /// Connection state. + state: State, + + /// Connection ID. + connection_id: ConnectionId, + + /// Noise channel ID. + noise_channel_id: ChannelId, + + /// Local keypair. + id_keypair: Keypair, + + /// Peer address + peer_address: SocketAddr, + + /// Local address. + local_address: SocketAddr, +} + +/// Connection state. +#[derive(Debug)] +enum State { + /// Connection is poisoned. + Poisoned, + + /// Connection is closed. + Closed, + + /// Connection has been opened. + Opened { + /// Noise context. + context: NoiseContext, + }, + + /// Local Noise handshake has been sent to peer and the connection + /// is waiting for an answer. + HandshakeSent { + /// Noise context. + context: NoiseContext, + }, + + /// Response to local Noise handshake has been received and the connection + /// is being validated by `TransportManager`. + Validating { + /// Noise context. + context: NoiseContext, + }, +} + +impl OpeningWebRtcConnection { + /// Create new [`OpeningWebRtcConnection`]. + pub fn new( + rtc: Rtc, + connection_id: ConnectionId, + noise_channel_id: ChannelId, + id_keypair: Keypair, + peer_address: SocketAddr, + local_address: SocketAddr, + ) -> OpeningWebRtcConnection { + tracing::trace!( + target: LOG_TARGET, + ?connection_id, + ?peer_address, + "new connection opened", + ); + + Self { + rtc, + state: State::Closed, + connection_id, + noise_channel_id, + id_keypair, + peer_address, + local_address, + } + } + + /// Get remote fingerprint to bytes. + fn remote_fingerprint(&mut self) -> Vec { + let fingerprint = self + .rtc + .direct_api() + .remote_dtls_fingerprint() + .expect("fingerprint to exist") + .clone(); + Self::fingerprint_to_bytes(&fingerprint) + } + + /// Get local fingerprint as bytes. + fn local_fingerprint(&mut self) -> Vec { + Self::fingerprint_to_bytes(self.rtc.direct_api().local_dtls_fingerprint()) + } + + /// Convert `Fingerprint` to bytes. + fn fingerprint_to_bytes(fingerprint: &Fingerprint) -> Vec { + const MULTIHASH_SHA256_CODE: u64 = 0x12; + Multihash::wrap(MULTIHASH_SHA256_CODE, &fingerprint.bytes) + .expect("fingerprint's len to be 32 bytes") + .to_bytes() + } + + /// Once a Noise data channel has been opened, even though the light client was the dialer, + /// the WebRTC server will act as the dialer as per the specification. + /// + /// Create the first Noise handshake message and send it to remote peer. + fn on_noise_channel_open(&mut self) -> crate::Result<()> { + tracing::trace!(target: LOG_TARGET, "send initial noise handshake"); + + let State::Opened { mut context } = std::mem::replace(&mut self.state, State::Poisoned) + else { + return Err(Error::InvalidState); + }; + + // create first noise handshake and send it to remote peer + let payload = WebRtcMessage::encode(context.first_message(Role::Dialer)?, None); + + self.rtc + .channel(self.noise_channel_id) + .ok_or(Error::ChannelDoesntExist)? + .write(true, payload.as_slice()) + .map_err(Error::WebRtc)?; + + self.state = State::HandshakeSent { context }; + Ok(()) + } + + /// Handle timeout. + pub fn on_timeout(&mut self) -> crate::Result<()> { + if let Err(error) = self.rtc.handle_input(Input::Timeout(Instant::now())) { + tracing::error!( + target: LOG_TARGET, + ?error, + "failed to handle timeout for `Rtc`" + ); + + self.rtc.disconnect(); + return Err(Error::Disconnected); + } + + Ok(()) + } + + /// Handle Noise handshake response. + /// + /// The message contains remote's peer ID which is used by the `TransportManager` to validate + /// the connection. Note the Noise handshake requires one more messages to be sent by the dialer + /// (us) but the inbound connection must first be verified by the `TransportManager` which will + /// either accept or reject the connection. + /// + /// If the peer is accepted, [`OpeningWebRtcConnection::on_accept()`] is called which creates + /// the final Noise message and sends it to the remote peer, concluding the handshake. + fn on_noise_channel_data(&mut self, data: Vec) -> crate::Result { + tracing::trace!(target: LOG_TARGET, "handle noise handshake reply"); + + let State::HandshakeSent { mut context } = + std::mem::replace(&mut self.state, State::Poisoned) + else { + return Err(Error::InvalidState); + }; + + let message = WebRtcMessage::decode(&data)?.payload.ok_or(Error::InvalidData)?; + let remote_peer_id = context.get_remote_peer_id(&message)?; + + tracing::trace!( + target: LOG_TARGET, + ?remote_peer_id, + "remote reply parsed successfully", + ); + + self.state = State::Validating { context }; + + let remote_fingerprint = self + .rtc + .direct_api() + .remote_dtls_fingerprint() + .expect("fingerprint to exist") + .clone() + .bytes; + + const MULTIHASH_SHA256_CODE: u64 = 0x12; + let certificate = Multihash::wrap(MULTIHASH_SHA256_CODE, &remote_fingerprint) + .expect("fingerprint's len to be 32 bytes"); + + let address = Multiaddr::empty() + .with(Protocol::from(self.peer_address.ip())) + .with(Protocol::Udp(self.peer_address.port())) + .with(Protocol::WebRTC) + .with(Protocol::Certhash(certificate)) + .with(Protocol::P2p(remote_peer_id.into())); + + Ok(WebRtcEvent::ConnectionOpened { + peer: remote_peer_id, + endpoint: Endpoint::listener(address, self.connection_id), + }) + } + + /// Accept connection by sending the final Noise handshake message + /// and return the `Rtc` object for further use. + pub fn on_accept(mut self) -> crate::Result { + tracing::trace!(target: LOG_TARGET, "accept webrtc connection"); + + let State::Validating { mut context } = std::mem::replace(&mut self.state, State::Poisoned) + else { + return Err(Error::InvalidState); + }; + + // create second noise handshake message and send it to remote + let payload = WebRtcMessage::encode(context.second_message()?, None); + + let mut channel = + self.rtc.channel(self.noise_channel_id).ok_or(Error::ChannelDoesntExist)?; + + channel.write(true, payload.as_slice()).map_err(Error::WebRtc)?; + self.rtc.direct_api().close_data_channel(self.noise_channel_id); + + Ok(self.rtc) + } + + /// Handle input from peer. + pub fn on_input(&mut self, buffer: DatagramRecv) -> crate::Result<()> { + tracing::trace!( + target: LOG_TARGET, + peer = ?self.peer_address, + "handle input from peer", + ); + + let message = Input::Receive( + Instant::now(), + Receive { + source: self.peer_address, + proto: Str0mProtocol::Udp, + destination: self.local_address, + contents: buffer, + }, + ); + + match self.rtc.accepts(&message) { + true => self.rtc.handle_input(message).map_err(|error| { + tracing::debug!(target: LOG_TARGET, source = ?self.peer_address, ?error, "failed to handle data"); + Error::InputRejected + }), + false => { + tracing::warn!( + target: LOG_TARGET, + peer = ?self.peer_address, + "input rejected", + ); + Err(Error::InputRejected) + } + } + } + + /// Progress the state of [`OpeningWebRtcConnection`]. + pub fn poll_process(&mut self) -> WebRtcEvent { + if !self.rtc.is_alive() { + tracing::debug!( + target: LOG_TARGET, + "`Rtc` is not alive, closing `WebRtcConnection`" + ); + + return WebRtcEvent::ConnectionClosed; + } + + loop { + let output = match self.rtc.poll_output() { + Ok(output) => output, + Err(error) => { + tracing::debug!( + target: LOG_TARGET, + connection_id = ?self.connection_id, + ?error, + "`WebRtcConnection::poll_process()` failed", + ); + + return WebRtcEvent::ConnectionClosed; + } + }; + + match output { + Output::Transmit(transmit) => { + tracing::trace!( + target: LOG_TARGET, + "transmit data", + ); + + return WebRtcEvent::Transmit { + destination: transmit.destination, + datagram: transmit.contents, + }; + } + Output::Timeout(timeout) => return WebRtcEvent::Timeout { timeout }, + Output::Event(e) => match e { + Event::IceConnectionStateChange(v) => + if v == IceConnectionState::Disconnected { + tracing::trace!(target: LOG_TARGET, "ice connection closed"); + return WebRtcEvent::ConnectionClosed; + }, + Event::ChannelOpen(channel_id, name) => { + tracing::trace!( + target: LOG_TARGET, + connection_id = ?self.connection_id, + ?channel_id, + ?name, + "channel opened", + ); + + if channel_id != self.noise_channel_id { + tracing::warn!( + target: LOG_TARGET, + connection_id = ?self.connection_id, + ?channel_id, + "ignoring opened channel", + ); + continue; + } + + if let Err(error) = self.on_noise_channel_open() { + tracing::debug!( + target: LOG_TARGET, + connection_id = ?self.connection_id, + ?error, + "noise channel open failed", + ); + return WebRtcEvent::ConnectionClosed; + } + } + Event::ChannelData(data) => { + tracing::trace!( + target: LOG_TARGET, + "data received over channel", + ); + + if data.id != self.noise_channel_id { + tracing::warn!( + target: LOG_TARGET, + channel_id = ?data.id, + connection_id = ?self.connection_id, + "ignoring data from channel", + ); + continue; + } + + match self.on_noise_channel_data(data.data) { + Ok(event) => return event, + Err(error) => { + tracing::debug!( + target: LOG_TARGET, + connection_id = ?self.connection_id, + ?error, + "noise channel data handling failed", + ); + return WebRtcEvent::ConnectionClosed; + } + } + } + Event::ChannelClose(channel_id) => { + tracing::debug!(target: LOG_TARGET, ?channel_id, "channel closed"); + } + Event::Connected => match std::mem::replace(&mut self.state, State::Poisoned) { + State::Closed => { + let remote_fingerprint = self.remote_fingerprint(); + let local_fingerprint = self.local_fingerprint(); + + let context = match NoiseContext::with_prologue( + &self.id_keypair, + noise_prologue(local_fingerprint, remote_fingerprint), + ) { + Ok(context) => context, + Err(err) => { + tracing::error!( + target: LOG_TARGET, + peer = ?self.peer_address, + "NoiseContext failed with error {err}", + ); + + return WebRtcEvent::ConnectionClosed; + } + }; + + tracing::debug!( + target: LOG_TARGET, + peer = ?self.peer_address, + "connection opened", + ); + + self.state = State::Opened { context }; + } + state => { + tracing::debug!( + target: LOG_TARGET, + peer = ?self.peer_address, + ?state, + "invalid state for connection" + ); + return WebRtcEvent::ConnectionClosed; + } + }, + event => { + tracing::warn!(target: LOG_TARGET, ?event, "unhandled event"); + } + }, + } + } + } +} diff --git a/client/litep2p/src/transport/webrtc/substream.rs b/client/litep2p/src/transport/webrtc/substream.rs new file mode 100644 index 00000000..cf35a178 --- /dev/null +++ b/client/litep2p/src/transport/webrtc/substream.rs @@ -0,0 +1,1510 @@ +// Copyright 2024 litep2p developers +// +// Permission is hereby granted, free of charge, to any person obtaining a +// copy of this software and associated documentation files (the "Software"), +// to deal in the Software without restriction, including without limitation +// the rights to use, copy, modify, merge, publish, distribute, sublicense, +// and/or sell copies of the Software, and to permit persons to whom the +// Software is furnished to do so, subject to the following conditions: +// +// The above copyright notice and this permission notice shall be included in +// all copies or substantial portions of the Software. +// +// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS +// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE +// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER +// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING +// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER +// DEALINGS IN THE SOFTWARE. + +use crate::{ + transport::webrtc::{schema::webrtc::message::Flag, util::WebRtcMessage}, + Error, +}; + +use bytes::{Buf, BufMut, BytesMut}; +use futures::{task::AtomicWaker, Future, Stream}; +use parking_lot::Mutex; +use tokio::sync::mpsc::{channel, Receiver, Sender}; +use tokio_util::sync::PollSender; + +use std::{ + pin::Pin, + sync::Arc, + task::{Context, Poll}, + time::Duration, +}; + +/// Maximum frame size. +const MAX_FRAME_SIZE: usize = 16384; + +/// Timeout for waiting on FIN_ACK after sending FIN. +/// Matches go-libp2p's 5 second stream close timeout. +const FIN_ACK_TIMEOUT: Duration = Duration::from_secs(5); + +/// Substream event. +#[derive(Debug, PartialEq, Eq)] +pub enum Event { + /// Receiver closed. + RecvClosed, + + /// Send/receive message with optional flag. + Message { + payload: Vec, + flag: Option, + }, +} + +/// Substream stream. +#[derive(Debug, Clone, Copy)] +enum State { + /// Substream is fully open. + Open, + + /// Remote is no longer interested in receiving anything. + SendClosed, + + /// Shutdown initiated, flushing pending data before sending FIN. + Closing, + + /// We sent FIN, waiting for FIN_ACK. + FinSent, + + /// We received FIN_ACK, write half is closed. + FinAcked, +} + +/// Channel-backed substream. Must be owned and polled by exactly one task at a time. +pub struct Substream { + /// Substream state. + state: Arc>, + + /// Read buffer. + read_buffer: BytesMut, + + /// TX channel for sending messages to `peer`, wrapped in a [`PollSender`] + /// so that backpressure is driven by the caller's waker. + tx: PollSender, + + /// RX channel for receiving messages from `peer`. + rx: Receiver, + + /// Waker to notify when shutdown completes (FIN_ACK received). + shutdown_waker: Arc, + + /// Waker to notify when write state changes (e.g., STOP_SENDING received). + write_waker: Arc, + + /// Timeout for waiting on FIN_ACK after sending FIN. + /// Boxed to maintain Unpin for Substream while allowing the Sleep to be polled. + fin_ack_timeout: Option>>, +} + +impl Substream { + /// Create new [`Substream`]. + pub fn new() -> (Self, SubstreamHandle) { + let (outbound_tx, outbound_rx) = channel(256); + let (inbound_tx, inbound_rx) = channel(256); + let state = Arc::new(Mutex::new(State::Open)); + let shutdown_waker = Arc::new(AtomicWaker::new()); + let write_waker = Arc::new(AtomicWaker::new()); + + let handle = SubstreamHandle { + inbound_tx, + outbound_tx: outbound_tx.clone(), + rx: outbound_rx, + state: Arc::clone(&state), + shutdown_waker: Arc::clone(&shutdown_waker), + write_waker: Arc::clone(&write_waker), + read_closed: std::sync::atomic::AtomicBool::new(false), + }; + + ( + Self { + state, + tx: PollSender::new(outbound_tx), + rx: inbound_rx, + read_buffer: BytesMut::new(), + shutdown_waker, + write_waker, + fin_ack_timeout: None, + }, + handle, + ) + } +} + +/// Substream handle that is given to the WebRTC transport backend. +pub struct SubstreamHandle { + state: Arc>, + + /// TX channel for sending inbound messages from `peer` to the associated `Substream`. + inbound_tx: Sender, + + /// TX channel for sending outbound messages to `peer` (e.g., FIN_ACK responses). + outbound_tx: Sender, + + /// RX channel for receiving outbound messages to `peer` from the associated `Substream`. + rx: Receiver, + + /// Waker to notify when shutdown completes (FIN_ACK received). + shutdown_waker: Arc, + + /// Waker to notify when write state changes (e.g., STOP_SENDING received). + write_waker: Arc, + + /// Whether we've already sent RecvClosed to the inbound channel. + /// Prevents duplicate RecvClosed events if multiple FIN messages are received. + read_closed: std::sync::atomic::AtomicBool, +} + +impl SubstreamHandle { + /// Handle message received from a remote peer. + /// + /// Process an incoming WebRTC message, handling any payload and flags. + /// + /// Payload is processed first (if present), then flags are handled. This ensures that + /// a FIN message containing final data will deliver that data before signaling closure. + pub async fn on_message(&self, message: WebRtcMessage) -> crate::Result<()> { + // Process payload first, before handling flags. + // This ensures that if a FIN message contains data, we deliver it before closing. + if let Some(payload) = message.payload { + if !payload.is_empty() { + self.inbound_tx + .send(Event::Message { + payload, + flag: None, + }) + .await?; + } + } + + // Now handle flags + if let Some(flag) = message.flag { + match flag { + Flag::Fin => { + // Guard against duplicate FIN messages - only send RecvClosed once + if self.read_closed.swap(true, std::sync::atomic::Ordering::SeqCst) { + // Already processed FIN, ignore duplicate + tracing::debug!( + target: "litep2p::webrtc::substream", + "received duplicate FIN, ignoring" + ); + return Ok(()); + } + + // Received FIN from remote, close our read half + self.inbound_tx.send(Event::RecvClosed).await?; + + // Send FIN_ACK back to remote using try_send to avoid blocking. + // If the channel is full, the remote will timeout waiting for FIN_ACK + // and handle it gracefully. This prevents deadlock if the outbound + // channel is blocked due to backpressure. + if let Err(e) = self.outbound_tx.try_send(Event::Message { + payload: vec![], + flag: Some(Flag::FinAck), + }) { + tracing::warn!( + target: "litep2p::webrtc::substream", + ?e, + "failed to send FIN_ACK, remote will timeout" + ); + } + return Ok(()); + } + Flag::FinAck => { + // Received FIN_ACK, we can now fully close our write half + let mut state = self.state.lock(); + if matches!(*state, State::FinSent) { + *state = State::FinAcked; + // Wake up any task waiting on shutdown + self.shutdown_waker.wake(); + } else { + tracing::warn!( + target: "litep2p::webrtc::substream", + ?state, + "received FIN_ACK in unexpected state, ignoring" + ); + } + return Ok(()); + } + Flag::StopSending => { + *self.state.lock() = State::SendClosed; + // Wake any blocked poll_write so it can see the state change + self.write_waker.wake(); + return Ok(()); + } + Flag::ResetStream => { + // RESET_STREAM abruptly terminates both sides of the stream + // (matching go-libp2p behavior) + // Close the read side + let _ = self.inbound_tx.try_send(Event::RecvClosed); + // Close the write side + *self.state.lock() = State::SendClosed; + // Wake any blocked poll_write so it can see the state change + self.write_waker.wake(); + return Err(Error::ConnectionClosed); + } + } + } + + Ok(()) + } +} + +impl Stream for SubstreamHandle { + type Item = Event; + + fn poll_next(mut self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll> { + // First, try to drain any pending outbound messages + match self.rx.poll_recv(cx) { + Poll::Ready(Some(event)) => return Poll::Ready(Some(event)), + Poll::Ready(None) => { + // Outbound channel closed (all senders dropped) + return Poll::Ready(None); + } + Poll::Pending => { + // No messages available, check if we should signal closure + } + } + + // Check if Substream has been dropped (inbound channel closed) + // When Substream is dropped, there will be no more outbound messages + // Since we've already tried to recv above and got Pending, we know the queue is empty + // Therefore, it's safe to signal closure + if self.inbound_tx.is_closed() { + return Poll::Ready(None); + } + + Poll::Pending + } +} + +impl tokio::io::AsyncRead for Substream { + fn poll_read( + mut self: Pin<&mut Self>, + cx: &mut Context<'_>, + buf: &mut tokio::io::ReadBuf<'_>, + ) -> Poll> { + // if there are any remaining bytes from a previous read, consume them first + if self.read_buffer.remaining() > 0 { + let num_bytes = std::cmp::min(self.read_buffer.remaining(), buf.remaining()); + + buf.put_slice(&self.read_buffer[..num_bytes]); + self.read_buffer.advance(num_bytes); + + // TODO: optimize by trying to read more data from substream and not exiting early + return Poll::Ready(Ok(())); + } + + match futures::ready!(self.rx.poll_recv(cx)) { + None | Some(Event::RecvClosed) => + Poll::Ready(Err(std::io::ErrorKind::BrokenPipe.into())), + Some(Event::Message { payload, flag: _ }) => { + if payload.len() > MAX_FRAME_SIZE { + return Poll::Ready(Err(std::io::ErrorKind::PermissionDenied.into())); + } + + match buf.remaining() >= payload.len() { + true => buf.put_slice(&payload), + false => { + let remaining = buf.remaining(); + buf.put_slice(&payload[..remaining]); + self.read_buffer.put_slice(&payload[remaining..]); + } + } + + Poll::Ready(Ok(())) + } + } + } +} + +impl tokio::io::AsyncWrite for Substream { + fn poll_write( + mut self: Pin<&mut Self>, + cx: &mut Context<'_>, + buf: &[u8], + ) -> Poll> { + // Register waker so we get notified on state changes (e.g., STOP_SENDING) + self.write_waker.register(cx.waker()); + + // Reject writes if we're closing or closed + match *self.state.lock() { + State::SendClosed | State::Closing | State::FinSent | State::FinAcked => { + return Poll::Ready(Err(std::io::ErrorKind::BrokenPipe.into())); + } + State::Open => {} + } + + match futures::ready!(self.tx.poll_reserve(cx)) { + Ok(()) => {} + Err(_) => return Poll::Ready(Err(std::io::ErrorKind::BrokenPipe.into())), + }; + + // Re-check state after poll_reserve - it may have changed while we were waiting + match *self.state.lock() { + State::SendClosed | State::Closing | State::FinSent | State::FinAcked => { + return Poll::Ready(Err(std::io::ErrorKind::BrokenPipe.into())); + } + State::Open => {} + } + + let num_bytes = std::cmp::min(MAX_FRAME_SIZE, buf.len()); + let frame = buf[..num_bytes].to_vec(); + + match self.tx.send_item(Event::Message { + payload: frame, + flag: None, + }) { + Ok(()) => Poll::Ready(Ok(num_bytes)), + Err(_) => Poll::Ready(Err(std::io::ErrorKind::BrokenPipe.into())), + } + } + + fn poll_flush(self: Pin<&mut Self>, _cx: &mut Context<'_>) -> Poll> { + Poll::Ready(Ok(())) + } + + fn poll_shutdown( + mut self: Pin<&mut Self>, + cx: &mut Context<'_>, + ) -> Poll> { + // State machine for proper shutdown: + // 1. Transition to Closing (stops accepting new writes) + // 2. Flush pending data + // 3. Send FIN flag + // 4. Transition to FinSent + // 5. Wait for FIN_ACK + // 6. Transition to FinAcked and complete + + let current_state = *self.state.lock(); + + match current_state { + // Already received FIN_ACK, shutdown complete + State::FinAcked => return Poll::Ready(Ok(())), + + // Sent FIN, waiting for FIN_ACK - poll timeout and return Pending + State::FinSent => { + // Register waker FIRST to avoid race condition with on_message + self.shutdown_waker.register(cx.waker()); + + // Re-check state after waker registration in case FIN_ACK arrived + // between the initial state check and waker registration + if matches!(*self.state.lock(), State::FinAcked) { + return Poll::Ready(Ok(())); + } + + // Poll the timeout - if it fires, force shutdown completion + if let Some(timeout) = self.fin_ack_timeout.as_mut() { + if timeout.as_mut().poll(cx).is_ready() { + tracing::debug!( + target: "litep2p::webrtc::substream", + "FIN_ACK timeout exceeded, forcing shutdown completion" + ); + *self.state.lock() = State::FinAcked; + return Poll::Ready(Ok(())); + } + } + + return Poll::Pending; + } + + // First call to shutdown - transition to Closing + State::Open => { + *self.state.lock() = State::Closing; + } + + State::Closing => { + // Already in closing state, continue with shutdown process. + // Guard against duplicate FIN sends: if timeout is already set, we've + // already sent FIN and are waiting for FIN_ACK. This shouldn't happen + // with correct AsyncWrite usage (&mut self), but provides defense in depth. + if self.fin_ack_timeout.is_some() { + self.shutdown_waker.register(cx.waker()); + return Poll::Pending; + } + } + + State::SendClosed => { + // Remote closed send, we can still send FIN + } + } + + // Flush any pending data + // Note: Currently poll_flush is a no-op, but the channel backpressure + // provides implicit flushing since we wait for poll_reserve below + futures::ready!(self.as_mut().poll_flush(cx))?; + + // Reserve space to send FIN + match futures::ready!(self.tx.poll_reserve(cx)) { + Ok(()) => {} + Err(_) => return Poll::Ready(Err(std::io::ErrorKind::BrokenPipe.into())), + }; + + // Send message with FIN flag + match self.tx.send_item(Event::Message { + payload: vec![], + flag: Some(Flag::Fin), + }) { + Ok(()) => { + // Race condition mitigation strategy: + // 1. Transition to FinSent FIRST so on_message can recognize FIN_ACK (if waker + // registered first, FIN_ACK would be ignored since state != FinSent) + // 2. Register waker so we'll be notified on future FIN_ACK arrivals + // 3. Re-check state to catch FIN_ACK that arrived between steps 1 and 2 (wake() + // called before waker registered has no effect, but state changed) + *self.state.lock() = State::FinSent; + self.shutdown_waker.register(cx.waker()); + if matches!(*self.state.lock(), State::FinAcked) { + return Poll::Ready(Ok(())); + } + + // Initialize the timeout for FIN_ACK + let mut timeout = Box::pin(tokio::time::sleep(FIN_ACK_TIMEOUT)); + // Poll the timeout once to register it with tokio's timer + // This ensures we'll be woken when it expires + let _ = timeout.as_mut().poll(cx); + self.fin_ack_timeout = Some(timeout); + + Poll::Pending + } + Err(_) => Poll::Ready(Err(std::io::ErrorKind::BrokenPipe.into())), + } + } +} + +#[cfg(test)] +mod tests { + use super::*; + use futures::StreamExt; + use tokio::io::{AsyncRead, AsyncReadExt, AsyncWrite, AsyncWriteExt, ReadBuf}; + + #[tokio::test] + async fn write_small_frame() { + let (mut substream, mut handle) = Substream::new(); + + substream.write_all(&vec![0u8; 1337]).await.unwrap(); + + assert_eq!( + handle.next().await, + Some(Event::Message { + payload: vec![0u8; 1337], + flag: None + }) + ); + + futures::future::poll_fn(|cx| match handle.poll_next_unpin(cx) { + Poll::Pending => Poll::Ready(()), + Poll::Ready(_) => panic!("invalid event"), + }) + .await; + } + + #[tokio::test] + async fn write_large_frame() { + let (mut substream, mut handle) = Substream::new(); + + substream.write_all(&vec![0u8; (2 * MAX_FRAME_SIZE) + 1]).await.unwrap(); + + assert_eq!( + handle.rx.recv().await, + Some(Event::Message { + payload: vec![0u8; MAX_FRAME_SIZE], + flag: None, + }) + ); + assert_eq!( + handle.rx.recv().await, + Some(Event::Message { + payload: vec![0u8; MAX_FRAME_SIZE], + flag: None, + }) + ); + assert_eq!( + handle.rx.recv().await, + Some(Event::Message { + payload: vec![0u8; 1], + flag: None, + }) + ); + + futures::future::poll_fn(|cx| match handle.poll_next_unpin(cx) { + Poll::Pending => Poll::Ready(()), + Poll::Ready(_) => panic!("invalid event"), + }) + .await; + } + + #[tokio::test] + async fn try_to_write_to_closed_substream() { + let (mut substream, handle) = Substream::new(); + *handle.state.lock() = State::SendClosed; + + match substream.write_all(&vec![0u8; 1337]).await { + Err(error) => assert_eq!(error.kind(), std::io::ErrorKind::BrokenPipe), + _ => panic!("invalid event"), + } + } + + #[tokio::test] + async fn substream_shutdown() { + let (mut substream, mut handle) = Substream::new(); + + substream.write_all(&vec![1u8; 1337]).await.unwrap(); + + // Spawn shutdown since it waits for FIN_ACK + let shutdown_task = tokio::spawn(async move { + substream.shutdown().await.unwrap(); + }); + + assert_eq!( + handle.next().await, + Some(Event::Message { + payload: vec![1u8; 1337], + flag: None, + }) + ); + // After shutdown, should send FIN flag + assert_eq!( + handle.next().await, + Some(Event::Message { + payload: vec![], + flag: Some(Flag::Fin) + }) + ); + + // Send FIN_ACK to complete shutdown + handle + .on_message(WebRtcMessage { + payload: None, + flag: Some(Flag::FinAck), + }) + .await + .unwrap(); + + shutdown_task.await.unwrap(); + } + + #[tokio::test] + async fn try_to_read_from_closed_substream() { + let (mut substream, handle) = Substream::new(); + handle + .on_message(WebRtcMessage { + payload: None, + flag: Some(Flag::Fin), + }) + .await + .unwrap(); + + match substream.read(&mut vec![0u8; 256]).await { + Err(error) => assert_eq!(error.kind(), std::io::ErrorKind::BrokenPipe), + _ => panic!("invalid event"), + } + } + + #[tokio::test] + async fn read_small_frame() { + let (mut substream, handle) = Substream::new(); + handle + .inbound_tx + .send(Event::Message { + payload: vec![1u8; 256], + flag: None, + }) + .await + .unwrap(); + + let mut buf = vec![0u8; 2048]; + + match substream.read(&mut buf).await { + Ok(nread) => { + assert_eq!(nread, 256); + assert_eq!(buf[..nread], vec![1u8; 256]); + } + Err(error) => panic!("invalid event: {error:?}"), + } + + let mut read_buf = ReadBuf::new(&mut buf); + futures::future::poll_fn(|cx| { + match Pin::new(&mut substream).poll_read(cx, &mut read_buf) { + Poll::Pending => Poll::Ready(()), + _ => panic!("invalid event"), + } + }) + .await; + } + + #[tokio::test] + async fn read_small_frame_in_two_reads() { + let (mut substream, handle) = Substream::new(); + let mut first = vec![1u8; 256]; + first.extend_from_slice(&vec![2u8; 256]); + + handle + .inbound_tx + .send(Event::Message { + payload: first, + flag: None, + }) + .await + .unwrap(); + + let mut buf = vec![0u8; 256]; + + match substream.read(&mut buf).await { + Ok(nread) => { + assert_eq!(nread, 256); + assert_eq!(buf[..nread], vec![1u8; 256]); + } + Err(error) => panic!("invalid event: {error:?}"), + } + + match substream.read(&mut buf).await { + Ok(nread) => { + assert_eq!(nread, 256); + assert_eq!(buf[..nread], vec![2u8; 256]); + } + Err(error) => panic!("invalid event: {error:?}"), + } + + let mut read_buf = ReadBuf::new(&mut buf); + futures::future::poll_fn(|cx| { + match Pin::new(&mut substream).poll_read(cx, &mut read_buf) { + Poll::Pending => Poll::Ready(()), + _ => panic!("invalid event"), + } + }) + .await; + } + + #[tokio::test] + async fn read_frames() { + let (mut substream, handle) = Substream::new(); + let mut first = vec![1u8; 256]; + first.extend_from_slice(&vec![2u8; 256]); + + handle + .inbound_tx + .send(Event::Message { + payload: first, + flag: None, + }) + .await + .unwrap(); + handle + .inbound_tx + .send(Event::Message { + payload: vec![4u8; 2048], + flag: None, + }) + .await + .unwrap(); + + let mut buf = vec![0u8; 256]; + + match substream.read(&mut buf).await { + Ok(nread) => { + assert_eq!(nread, 256); + assert_eq!(buf[..nread], vec![1u8; 256]); + } + Err(error) => panic!("invalid event: {error:?}"), + } + + let mut buf = vec![0u8; 128]; + + match substream.read(&mut buf).await { + Ok(nread) => { + assert_eq!(nread, 128); + assert_eq!(buf[..nread], vec![2u8; 128]); + } + Err(error) => panic!("invalid event: {error:?}"), + } + + let mut buf = vec![0u8; 128]; + + match substream.read(&mut buf).await { + Ok(nread) => { + assert_eq!(nread, 128); + assert_eq!(buf[..nread], vec![2u8; 128]); + } + Err(error) => panic!("invalid event: {error:?}"), + } + + let mut buf = vec![0u8; MAX_FRAME_SIZE]; + + match substream.read(&mut buf).await { + Ok(nread) => { + assert_eq!(nread, 2048); + assert_eq!(buf[..nread], vec![4u8; 2048]); + } + Err(error) => panic!("invalid event: {error:?}"), + } + + let mut read_buf = ReadBuf::new(&mut buf); + futures::future::poll_fn(|cx| { + match Pin::new(&mut substream).poll_read(cx, &mut read_buf) { + Poll::Pending => Poll::Ready(()), + _ => panic!("invalid event"), + } + }) + .await; + } + + #[tokio::test] + async fn backpressure_works() { + let (mut substream, _handle) = Substream::new(); + + // use all available bandwidth which by default is `256 * MAX_FRAME_SIZE`, + for _ in 0..128 { + substream.write_all(&vec![0u8; 2 * MAX_FRAME_SIZE]).await.unwrap(); + } + + // try to write one more byte but since all available bandwidth + // is taken the call will block + futures::future::poll_fn( + |cx| match Pin::new(&mut substream).poll_write(cx, &[0u8; 1]) { + Poll::Pending => Poll::Ready(()), + _ => panic!("invalid event"), + }, + ) + .await; + } + + #[tokio::test] + async fn backpressure_released_wakes_blocked_writer() { + use tokio::time::{sleep, timeout, Duration}; + + let (mut substream, mut handle) = Substream::new(); + + // Fill the channel to capacity, same pattern as `backpressure_works`. + for _ in 0..128 { + substream.write_all(&vec![0u8; 2 * MAX_FRAME_SIZE]).await.unwrap(); + } + + // Spawn a writer task that will try to write once more. This should initially block + // because the channel is full and rely on the AtomicWaker to be woken later. + let writer = tokio::spawn(async move { + substream + .write_all(&vec![1u8; MAX_FRAME_SIZE]) + .await + .expect("write should eventually succeed"); + }); + + // Give the writer a short moment to reach the blocked (Pending) state. + sleep(Duration::from_millis(10)).await; + assert!( + !writer.is_finished(), + "writer should be blocked by backpressure" + ); + + // Now consume a single message from the receiving side. This will: + // - free capacity in the channel + // - call `write_waker.wake()` from `poll_next` + // + // That wake must cause the blocked writer to be polled again and complete its write. + let _ = handle.next().await.expect("expected at least one outbound message"); + + // The writer should now complete in a timely fashion, proving that: + // - registering the waker before `try_reserve` works (no lost wakeup) + // - the wake from `poll_next` correctly unblocks the writer. + timeout(Duration::from_secs(1), writer) + .await + .expect("writer task did not complete after capacity was freed") + .expect("writer task panicked"); + } + + #[tokio::test] + async fn fin_flag_sent_on_shutdown() { + let (mut substream, mut handle) = Substream::new(); + + // Spawn shutdown since it waits for FIN_ACK + let shutdown_task = tokio::spawn(async move { + substream.shutdown().await.unwrap(); + }); + + // Should receive FIN flag + assert_eq!( + handle.next().await, + Some(Event::Message { + payload: vec![], + flag: Some(Flag::Fin) + }) + ); + + // Verify state is FinSent + assert!(matches!(*handle.state.lock(), State::FinSent)); + + // Send FIN_ACK to complete shutdown cleanly (avoids waiting for timeout) + handle + .on_message(WebRtcMessage { + payload: None, + flag: Some(Flag::FinAck), + }) + .await + .unwrap(); + + // Wait for shutdown to complete + shutdown_task.await.unwrap(); + } + + #[tokio::test] + async fn fin_ack_response_on_receiving_fin() { + let (mut substream, mut handle) = Substream::new(); + + // Spawn task to consume inbound events sent to the substream + let consumer_task = tokio::spawn(async move { + // Substream should receive RecvClosed + let mut buf = vec![0u8; 1024]; + match substream.read(&mut buf).await { + Err(e) if e.kind() == std::io::ErrorKind::BrokenPipe => { + // Expected - read half closed + } + other => panic!("Unexpected result: {:?}", other), + } + }); + + // Simulate receiving FIN from remote + handle + .on_message(WebRtcMessage { + payload: None, + flag: Some(Flag::Fin), + }) + .await + .unwrap(); + + // Wait for consumer task to complete + consumer_task.await.unwrap(); + + // Verify FIN_ACK was sent outbound to network + assert_eq!( + handle.next().await, + Some(Event::Message { + payload: vec![], + flag: Some(Flag::FinAck) + }) + ); + } + + #[tokio::test] + async fn fin_ack_received_transitions_to_fin_acked() { + let (mut substream, handle) = Substream::new(); + + // Spawn shutdown since it waits for FIN_ACK + let shutdown_task = tokio::spawn(async move { + substream.shutdown().await.unwrap(); + }); + + // Wait a bit for FIN to be sent + tokio::task::yield_now().await; + + // Verify we're in FinSent state + assert!(matches!(*handle.state.lock(), State::FinSent)); + + // Simulate receiving FIN_ACK from remote + handle + .on_message(WebRtcMessage { + payload: None, + flag: Some(Flag::FinAck), + }) + .await + .unwrap(); + + // Should transition to FinAcked + assert!(matches!(*handle.state.lock(), State::FinAcked)); + + // Shutdown should now complete + shutdown_task.await.unwrap(); + } + + #[tokio::test] + async fn full_fin_handshake() { + let (mut substream, mut handle) = Substream::new(); + + // Write some data + substream.write_all(&vec![1u8; 100]).await.unwrap(); + + // Spawn shutdown in background since it will wait for FIN_ACK + let shutdown_task = tokio::spawn(async move { + substream.shutdown().await.unwrap(); + }); + + // Verify data was sent + assert_eq!( + handle.next().await, + Some(Event::Message { + payload: vec![1u8; 100], + flag: None, + }) + ); + + // Verify FIN was sent + assert_eq!( + handle.next().await, + Some(Event::Message { + payload: vec![], + flag: Some(Flag::Fin) + }) + ); + + // Simulate receiving FIN_ACK + handle + .on_message(WebRtcMessage { + payload: None, + flag: Some(Flag::FinAck), + }) + .await + .unwrap(); + + // Should be in FinAcked state + assert!(matches!(*handle.state.lock(), State::FinAcked)); + + // Shutdown should now complete + shutdown_task.await.unwrap(); + } + + #[tokio::test] + async fn stop_sending_flag_closes_send_half() { + let (mut substream, handle) = Substream::new(); + + // Simulate receiving STOP_SENDING + handle + .on_message(WebRtcMessage { + payload: None, + flag: Some(Flag::StopSending), + }) + .await + .unwrap(); + + // Should transition to SendClosed + assert!(matches!(*handle.state.lock(), State::SendClosed)); + + // Attempting to write should fail + match substream.write_all(&vec![0u8; 100]).await { + Err(error) => assert_eq!(error.kind(), std::io::ErrorKind::BrokenPipe), + _ => panic!("write should have failed"), + } + } + + #[tokio::test] + async fn reset_stream_flag_closes_both_sides() { + use tokio::io::AsyncWriteExt; + let (mut substream, handle) = Substream::new(); + + // Simulate receiving RESET_STREAM + let result = handle + .on_message(WebRtcMessage { + payload: None, + flag: Some(Flag::ResetStream), + }) + .await; + + // Should return connection closed error + assert!(matches!(result, Err(Error::ConnectionClosed))); + + // Write side should be closed (state = SendClosed) + assert!(matches!(*handle.state.lock(), State::SendClosed)); + + // Attempting to write should fail + match substream.write_all(&vec![0u8; 100]).await { + Err(error) => assert_eq!(error.kind(), std::io::ErrorKind::BrokenPipe), + _ => panic!("write should have failed"), + } + + // Read side should also be closed (RecvClosed event was sent) + // The substream's rx channel should have RecvClosed + assert!(matches!(substream.rx.try_recv(), Ok(Event::RecvClosed))); + } + + #[tokio::test] + async fn fin_ack_does_not_trigger_other_flag() { + let (mut substream, handle) = Substream::new(); + + // Spawn shutdown since it waits for FIN_ACK + let shutdown_task = tokio::spawn(async move { + substream.shutdown().await.unwrap(); + }); + + // Wait a bit for FIN to be sent + tokio::task::yield_now().await; + + // Verify we're in FinSent state + assert!(matches!(*handle.state.lock(), State::FinSent)); + + // Now simulate receiving FIN_ACK (value = 3) + // This should NOT trigger STOP_SENDING (value = 1) or RESET_STREAM (value = 2) + // even though 3 & 1 == 1 and 3 & 2 == 2 + handle + .on_message(WebRtcMessage { + payload: None, + flag: Some(Flag::FinAck), + }) + .await + .unwrap(); + + // Should transition to FinAcked, not SendClosed + assert!(matches!(*handle.state.lock(), State::FinAcked)); + + // Shutdown should complete + shutdown_task.await.unwrap(); + + // Writing should still work (not closed by STOP_SENDING) + // Note: We already sent FIN, so write won't actually work, but the state check happens + // first + } + + #[tokio::test] + async fn flags_are_mutually_exclusive() { + let (_substream, handle) = Substream::new(); + + // Test that STOP_SENDING (1) is handled correctly + handle + .on_message(WebRtcMessage { + payload: None, + flag: Some(Flag::StopSending), + }) + .await + .unwrap(); + + assert!(matches!(*handle.state.lock(), State::SendClosed)); + + // Create a new substream for RESET_STREAM test + let (_substream2, handle2) = Substream::new(); + + // Test that RESET_STREAM (2) is handled correctly + let result = handle2 + .on_message(WebRtcMessage { + payload: None, + flag: Some(Flag::ResetStream), + }) + .await; + + assert!(matches!(result, Err(Error::ConnectionClosed))); + + // Create a new substream for FIN test + let (mut substream3, handle3) = Substream::new(); + + // Spawn shutdown since it waits for FIN_ACK + let shutdown_task3 = tokio::spawn(async move { + substream3.shutdown().await.unwrap(); + }); + + // Wait a bit for FIN to be sent + tokio::task::yield_now().await; + + // Test that FIN_ACK (3) is handled correctly + handle3 + .on_message(WebRtcMessage { + payload: None, + flag: Some(Flag::FinAck), + }) + .await + .unwrap(); + + assert!(matches!(*handle3.state.lock(), State::FinAcked)); + + // Shutdown should complete + shutdown_task3.await.unwrap(); + } + + #[tokio::test] + async fn stop_sending_wakes_blocked_writer() { + use tokio::io::AsyncWriteExt; + let (mut substream, handle) = Substream::new(); + + // Fill up the channel to cause poll_write to return Pending + // Channel capacity is 256 + for _ in 0..256 { + substream.write_all(&[1u8; 100]).await.unwrap(); + } + + // Now the next write should block waiting for channel capacity + let write_task = tokio::spawn(async move { + // This write will block because channel is full + let result = substream.write_all(&[2u8; 100]).await; + // Should fail because STOP_SENDING was received + assert!(result.is_err()); + }); + + // Give the writer time to block on poll_reserve + tokio::time::sleep(Duration::from_millis(10)).await; + assert!(!write_task.is_finished(), "write should be blocked"); + + // Simulate receiving STOP_SENDING from remote + handle + .on_message(WebRtcMessage { + payload: None, + flag: Some(Flag::StopSending), + }) + .await + .unwrap(); + + // The write task should wake up and see the state change + tokio::time::timeout(Duration::from_secs(1), write_task) + .await + .expect("write task should complete after STOP_SENDING") + .unwrap(); + } + + #[tokio::test] + async fn reset_stream_wakes_blocked_writer() { + use tokio::io::AsyncWriteExt; + let (mut substream, handle) = Substream::new(); + + // Fill up the channel to cause poll_write to return Pending + // Channel capacity is 256 + for _ in 0..256 { + substream.write_all(&[1u8; 100]).await.unwrap(); + } + + // Now the next write should block waiting for channel capacity + let write_task = tokio::spawn(async move { + // This write will block because channel is full + let result = substream.write_all(&[2u8; 100]).await; + // Should fail because RESET_STREAM was received + assert!(result.is_err()); + }); + + // Give the writer time to block on poll_reserve + tokio::time::sleep(Duration::from_millis(10)).await; + assert!(!write_task.is_finished(), "write should be blocked"); + + // Simulate receiving RESET_STREAM from remote + let result = handle + .on_message(WebRtcMessage { + payload: None, + flag: Some(Flag::ResetStream), + }) + .await; + // RESET_STREAM returns an error + assert!(result.is_err()); + + // The write task should wake up and see the state change + tokio::time::timeout(Duration::from_secs(1), write_task) + .await + .expect("write task should complete after RESET_STREAM") + .unwrap(); + } + + #[tokio::test] + async fn shutdown_rejects_new_writes() { + use tokio::io::AsyncWriteExt; + let (mut substream, mut handle) = Substream::new(); + + // Write some data + substream.write_all(&vec![1u8; 100]).await.unwrap(); + + // Spawn shutdown in background + let shutdown_task = tokio::spawn(async move { + substream.shutdown().await.unwrap(); + }); + + // Wait for data and FIN to be sent + assert_eq!( + handle.next().await, + Some(Event::Message { + payload: vec![1u8; 100], + flag: None, + }) + ); + assert_eq!( + handle.next().await, + Some(Event::Message { + payload: vec![], + flag: Some(Flag::Fin) + }) + ); + + // Verify we transitioned through Closing to FinSent + assert!(matches!(*handle.state.lock(), State::FinSent)); + + // Send FIN_ACK to complete shutdown + handle + .on_message(WebRtcMessage { + payload: None, + flag: Some(Flag::FinAck), + }) + .await + .unwrap(); + + // Shutdown should complete + shutdown_task.await.unwrap(); + } + + #[tokio::test] + async fn shutdown_idempotent() { + use tokio::io::AsyncWriteExt; + let (mut substream, mut handle) = Substream::new(); + + // Spawn first shutdown + let shutdown_task1 = tokio::spawn(async move { + substream.shutdown().await.unwrap(); + substream + }); + + // Wait for FIN to be sent + assert_eq!( + handle.next().await, + Some(Event::Message { + payload: vec![], + flag: Some(Flag::Fin) + }) + ); + assert!(matches!(*handle.state.lock(), State::FinSent)); + + // Send FIN_ACK to complete first shutdown + handle + .on_message(WebRtcMessage { + payload: None, + flag: Some(Flag::FinAck), + }) + .await + .unwrap(); + + // First shutdown should complete + let mut substream = shutdown_task1.await.unwrap(); + + // Second shutdown should succeed without error (already in FinAcked state) + substream.shutdown().await.unwrap(); + assert!(matches!(*handle.state.lock(), State::FinAcked)); + } + + #[tokio::test] + async fn shutdown_timeout_without_fin_ack() { + use tokio::time::{timeout, Duration}; + + let (mut substream, mut handle) = Substream::new(); + + // Spawn shutdown in background + let shutdown_task = tokio::spawn(async move { + substream.shutdown().await.unwrap(); + }); + + // Wait for FIN to be sent + assert_eq!( + handle.next().await, + Some(Event::Message { + payload: vec![], + flag: Some(Flag::Fin) + }) + ); + + // Verify we're in FinSent state + assert!(matches!(*handle.state.lock(), State::FinSent)); + + // DON'T send FIN_ACK - let it timeout + // The shutdown should complete after FIN_ACK_TIMEOUT (5 seconds) + // Add a bit of buffer to the timeout + let result = timeout(Duration::from_secs(7), shutdown_task).await; + + assert!(result.is_ok(), "Shutdown should complete after timeout"); + assert!( + result.unwrap().is_ok(), + "Shutdown should succeed after timeout" + ); + + // Should have transitioned to FinAcked after timeout + assert!(matches!(*handle.state.lock(), State::FinAcked)); + } + + #[tokio::test] + async fn closing_state_blocks_writes() { + use tokio::io::AsyncWriteExt; + + let (mut substream, handle) = Substream::new(); + + // Manually transition to Closing state + *handle.state.lock() = State::Closing; + + // Attempt to write should fail + let result = substream.write_all(&vec![1u8; 100]).await; + assert!(result.is_err()); + assert_eq!(result.unwrap_err().kind(), std::io::ErrorKind::BrokenPipe); + } + + #[tokio::test] + async fn handle_signals_closure_after_substream_dropped() { + use futures::StreamExt; + + let (mut substream, mut handle) = Substream::new(); + + // Complete shutdown handshake (client-initiated) + let shutdown_task = tokio::spawn(async move { + substream.shutdown().await.unwrap(); + // Substream will be dropped here + }); + + // Receive FIN + assert_eq!( + handle.next().await, + Some(Event::Message { + payload: vec![], + flag: Some(Flag::Fin) + }) + ); + + // Send FIN_ACK + handle + .on_message(WebRtcMessage { + payload: None, + flag: Some(Flag::FinAck), + }) + .await + .unwrap(); + + // Wait for shutdown to complete and Substream to drop + shutdown_task.await.unwrap(); + + // Verify handle signals closure (returns None) + assert_eq!( + handle.next().await, + None, + "SubstreamHandle should signal closure after Substream is dropped" + ); + } + + #[tokio::test] + async fn server_side_closure_after_receiving_fin() { + use futures::StreamExt; + + let (mut substream, mut handle) = Substream::new(); + + // Spawn task to consume from substream (server side) + let server_task = tokio::spawn(async move { + let mut buf = vec![0u8; 1024]; + // This should fail because we receive RecvClosed + match substream.read(&mut buf).await { + Err(e) if e.kind() == std::io::ErrorKind::BrokenPipe => { + // Expected - read half closed by FIN + } + other => panic!("Unexpected result: {:?}", other), + } + // Substream dropped here (server closes after receiving FIN) + }); + + // Remote (client) sends FIN + handle + .on_message(WebRtcMessage { + payload: None, + flag: Some(Flag::Fin), + }) + .await + .unwrap(); + + // Verify FIN_ACK was sent back + assert_eq!( + handle.next().await, + Some(Event::Message { + payload: vec![], + flag: Some(Flag::FinAck) + }) + ); + + // Wait for server to close substream + server_task.await.unwrap(); + + // Verify handle signals closure (returns None) - this is the key fix! + assert_eq!( + handle.next().await, + None, + "SubstreamHandle should signal closure after server receives FIN and drops Substream" + ); + } + + #[tokio::test] + async fn simultaneous_close() { + // Test simultaneous close where both sides send FIN at the same time. + // This verifies that: + // 1. Both sides can be in FinSent state simultaneously + // 2. Both sides correctly respond to FIN with FIN_ACK even when in FinSent state + // 3. Both sides eventually transition to FinAcked + + let (mut substream, mut handle) = Substream::new(); + + // Local side initiates shutdown (sends FIN, transitions to FinSent) + let shutdown_task = tokio::spawn(async move { + substream.shutdown().await.unwrap(); + }); + + // Wait for local FIN to be sent + assert_eq!( + handle.next().await, + Some(Event::Message { + payload: vec![], + flag: Some(Flag::Fin) + }) + ); + + // Verify local is in FinSent state + assert!(matches!(*handle.state.lock(), State::FinSent)); + + // Now simulate remote also sending FIN (simultaneous close) + // This should trigger FIN_ACK response even though we're in FinSent state + handle + .on_message(WebRtcMessage { + payload: None, + flag: Some(Flag::Fin), + }) + .await + .unwrap(); + + // Local should send FIN_ACK in response to remote's FIN + assert_eq!( + handle.next().await, + Some(Event::Message { + payload: vec![], + flag: Some(Flag::FinAck) + }) + ); + + // Local should still be in FinSent (waiting for FIN_ACK from remote) + assert!(matches!(*handle.state.lock(), State::FinSent)); + + // Now remote sends FIN_ACK (completing their side of the handshake) + handle + .on_message(WebRtcMessage { + payload: None, + flag: Some(Flag::FinAck), + }) + .await + .unwrap(); + + // Local should now transition to FinAcked + assert!(matches!(*handle.state.lock(), State::FinAcked)); + + // Shutdown should complete successfully + shutdown_task.await.unwrap(); + } + + #[tokio::test] + async fn fin_with_payload_delivers_data_before_close() { + // Test that when a FIN message contains payload data, the data is delivered + // to the substream before the RecvClosed event. This is important because + // the spec allows a FIN message to contain final data. + + let (mut substream, handle) = Substream::new(); + + // Simulate receiving FIN with payload from remote + handle + .on_message(WebRtcMessage { + payload: Some(b"final data".to_vec()), + flag: Some(Flag::Fin), + }) + .await + .unwrap(); + + // First, we should receive the payload data + let mut buf = vec![0u8; 1024]; + let n = substream.read(&mut buf).await.unwrap(); + assert_eq!(&buf[..n], b"final data"); + + // Then, subsequent read should fail with BrokenPipe (RecvClosed) + match substream.read(&mut buf).await { + Err(e) if e.kind() == std::io::ErrorKind::BrokenPipe => { + // Expected - read half closed after FIN + } + other => panic!("Expected BrokenPipe error, got: {:?}", other), + } + } +} diff --git a/client/litep2p/src/transport/webrtc/util.rs b/client/litep2p/src/transport/webrtc/util.rs new file mode 100644 index 00000000..ae050d50 --- /dev/null +++ b/client/litep2p/src/transport/webrtc/util.rs @@ -0,0 +1,148 @@ +// Copyright 2023 litep2p developers +// +// Permission is hereby granted, free of charge, to any person obtaining a +// copy of this software and associated documentation files (the "Software"), +// to deal in the Software without restriction, including without limitation +// the rights to use, copy, modify, merge, publish, distribute, sublicense, +// and/or sell copies of the Software, and to permit persons to whom the +// Software is furnished to do so, subject to the following conditions: +// +// The above copyright notice and this permission notice shall be included in +// all copies or substantial portions of the Software. +// +// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS +// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE +// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER +// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING +// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER +// DEALINGS IN THE SOFTWARE. + +use crate::{ + error::ParseError, + transport::webrtc::schema::{self, webrtc::message::Flag}, +}; + +use prost::Message; + +/// WebRTC message. +#[derive(Debug)] +pub struct WebRtcMessage { + /// Payload. + pub payload: Option>, + + /// Flag. + pub flag: Option, +} + +impl WebRtcMessage { + /// Encode WebRTC message with optional flag. + /// + /// Uses a single allocation by pre-calculating the total size and encoding + /// the varint length prefix and protobuf message directly into the output buffer. + pub fn encode(payload: Vec, flag: Option) -> Vec { + let protobuf_payload = schema::webrtc::Message { + message: (!payload.is_empty()).then_some(payload), + flag: flag.map(|f| f as i32), + }; + + // Calculate sizes upfront for single allocation with exact capacity + let protobuf_len = protobuf_payload.encoded_len(); + // Varint uses 7 bits per byte, so calculate exact length needed + // ilog2 gives the position of the highest set bit (0-indexed), divide by 7 for varint bytes + let varint_len = if protobuf_len == 0 { + 1 + } else { + (protobuf_len.ilog2() as usize / 7) + 1 + }; + + // Single allocation for the entire output with exact size + let mut out_buf = Vec::with_capacity(varint_len + protobuf_len); + + // Encode varint length prefix directly + let mut varint_buf = unsigned_varint::encode::usize_buffer(); + let varint_slice = unsigned_varint::encode::usize(protobuf_len, &mut varint_buf); + out_buf.extend_from_slice(varint_slice); + + // Encode protobuf directly into output buffer + protobuf_payload + .encode(&mut out_buf) + .expect("Vec to provide needed capacity"); + + out_buf + } + + /// Decode payload into [`WebRtcMessage`]. + /// + /// Decodes the varint length prefix directly from the slice without allocations, + /// then decodes the protobuf message from the remaining bytes. + /// + /// # Flag handling + /// + /// Unknown flag values (e.g., from a newer protocol version) are logged as warnings + /// and treated as `None` for forward compatibility. This allows the message payload + /// to still be processed even if the flag is not recognized. + pub fn decode(payload: &[u8]) -> Result { + // Decode varint length prefix directly from slice (no allocation) + // Returns (decoded_length, remaining_bytes_after_varint) + let (len, remaining) = + unsigned_varint::decode::usize(payload).map_err(|_| ParseError::InvalidData)?; + + // Get exactly `len` bytes of protobuf data (no allocation) + let protobuf_data = remaining.get(..len).ok_or(ParseError::InvalidData)?; + + match schema::webrtc::Message::decode(protobuf_data) { + Ok(message) => { + let flag = message.flag.and_then(|f| match Flag::try_from(f) { + Ok(flag) => Some(flag), + Err(_) => { + tracing::warn!( + target: "litep2p::webrtc", + ?f, + "received message with unknown flag value, ignoring flag" + ); + None + } + }); + Ok(Self { + payload: message.message, + flag, + }) + } + Err(_) => Err(ParseError::InvalidData), + } + } +} + +#[cfg(test)] +mod tests { + use super::*; + + #[test] + fn with_payload_no_flag() { + let message = WebRtcMessage::encode("Hello, world!".as_bytes().to_vec(), None); + let decoded = WebRtcMessage::decode(&message).unwrap(); + + assert_eq!(decoded.payload, Some("Hello, world!".as_bytes().to_vec())); + assert_eq!(decoded.flag, None); + } + + #[test] + fn with_payload_and_flag() { + let message = + WebRtcMessage::encode("Hello, world!".as_bytes().to_vec(), Some(Flag::StopSending)); + let decoded = WebRtcMessage::decode(&message).unwrap(); + + assert_eq!(decoded.payload, Some("Hello, world!".as_bytes().to_vec())); + assert_eq!(decoded.flag, Some(Flag::StopSending)); + } + + #[test] + fn no_payload_with_flag() { + let message = WebRtcMessage::encode(vec![], Some(Flag::ResetStream)); + let decoded = WebRtcMessage::decode(&message).unwrap(); + + assert_eq!(decoded.payload, None); + assert_eq!(decoded.flag, Some(Flag::ResetStream)); + } +} diff --git a/client/litep2p/src/transport/websocket/config.rs b/client/litep2p/src/transport/websocket/config.rs new file mode 100644 index 00000000..0d5aee29 --- /dev/null +++ b/client/litep2p/src/transport/websocket/config.rs @@ -0,0 +1,109 @@ +// Copyright 2023 litep2p developers +// +// Permission is hereby granted, free of charge, to any person obtaining a +// copy of this software and associated documentation files (the "Software"), +// to deal in the Software without restriction, including without limitation +// the rights to use, copy, modify, merge, publish, distribute, sublicense, +// and/or sell copies of the Software, and to permit persons to whom the +// Software is furnished to do so, subject to the following conditions: +// +// The above copyright notice and this permission notice shall be included in +// all copies or substantial portions of the Software. +// +// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS +// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE +// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER +// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING +// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER +// DEALINGS IN THE SOFTWARE. + +//! WebSocket transport configuration. + +use crate::{ + crypto::noise::{MAX_READ_AHEAD_FACTOR, MAX_WRITE_BUFFER_SIZE}, + transport::{CONNECTION_OPEN_TIMEOUT, MAX_PARALLEL_DIALS, SUBSTREAM_OPEN_TIMEOUT}, +}; + +/// WebSocket transport configuration. +#[derive(Debug)] +pub struct Config { + /// Listen address address for the transport. + /// + /// Default listen addreses are ["/ip4/0.0.0.0/tcp/0/ws", "/ip6/::/tcp/0/ws"]. + pub listen_addresses: Vec, + + /// Whether to set `SO_REUSEPORT` and bind a socket to the listen address port for outbound + /// connections. + /// + /// Note that `SO_REUSEADDR` is always set on listening sockets. + /// + /// Defaults to `true`. + pub reuse_port: bool, + + /// Enable `TCP_NODELAY`. + /// + /// Defaults to `false`. + pub nodelay: bool, + + /// Yamux configuration. + pub yamux_config: crate::yamux::Config, + + /// Noise read-ahead frame count. + /// + /// Specifies how many Noise frames are read per call to the underlying socket. + /// + /// By default this is configured to `5` so each call to the underlying socket can read up + /// to `5` Noise frame per call. Fewer frames may be read if there isn't enough data in the + /// socket. Each Noise frame is `65 KB` so the default setting allocates `65 KB * 5 = 325 KB` + /// per connection. + pub noise_read_ahead_frame_count: usize, + + /// Noise write buffer size. + /// + /// Specifes how many Noise frames are tried to be coalesced into a single system call. + /// By default the value is set to `2` which means that the `NoiseSocket` will allocate + /// `130 KB` for each outgoing connection. + /// + /// The write buffer size is separate from the read-ahead frame count so by default + /// the Noise code will allocate `2 * 65 KB + 5 * 65 KB = 455 KB` per connection. + pub noise_write_buffer_size: usize, + + /// Connection open timeout. + /// + /// How long should litep2p wait for a connection to be opened before the host + /// is deemed unreachable. + pub connection_open_timeout: std::time::Duration, + + /// Substream open timeout. + /// + /// How long should litep2p wait for a substream to be opened before considering + /// the substream rejected. + pub substream_open_timeout: std::time::Duration, + + /// Maximum number of parallel dial attempts for a single peer. + /// + /// **Note:** This value is overridden by the top-level + /// [`ConfigBuilder::with_max_parallel_dials`](crate::config::ConfigBuilder::with_max_parallel_dials) + /// when building `Litep2p`. + pub max_parallel_dials: usize, +} + +impl Default for Config { + fn default() -> Self { + Self { + listen_addresses: vec![ + "/ip4/0.0.0.0/tcp/0/ws".parse().expect("valid address"), + "/ip6/::/tcp/0/ws".parse().expect("valid address"), + ], + reuse_port: true, + nodelay: false, + yamux_config: Default::default(), + noise_read_ahead_frame_count: MAX_READ_AHEAD_FACTOR, + noise_write_buffer_size: MAX_WRITE_BUFFER_SIZE, + connection_open_timeout: CONNECTION_OPEN_TIMEOUT, + substream_open_timeout: SUBSTREAM_OPEN_TIMEOUT, + max_parallel_dials: MAX_PARALLEL_DIALS, + } + } +} diff --git a/client/litep2p/src/transport/websocket/connection.rs b/client/litep2p/src/transport/websocket/connection.rs new file mode 100644 index 00000000..2dc795e7 --- /dev/null +++ b/client/litep2p/src/transport/websocket/connection.rs @@ -0,0 +1,1410 @@ +// Copyright 2023 litep2p developers +// +// Permission is hereby granted, free of charge, to any person obtaining a +// copy of this software and associated documentation files (the "Software"), +// to deal in the Software without restriction, including without limitation +// the rights to use, copy, modify, merge, publish, distribute, sublicense, +// and/or sell copies of the Software, and to permit persons to whom the +// Software is furnished to do so, subject to the following conditions: +// +// The above copyright notice and this permission notice shall be included in +// all copies or substantial portions of the Software. +// +// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS +// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE +// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER +// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING +// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER +// DEALINGS IN THE SOFTWARE. + +use crate::{ + config::Role, + crypto::{ + ed25519::Keypair, + noise::{self, NoiseSocket}, + }, + error::{Error, NegotiationError, SubstreamError}, + multistream_select::{dialer_select_proto, listener_select_proto, Negotiated, Version}, + protocol::{Direction, Permit, ProtocolCommand, ProtocolSet, SubstreamKeepAlive}, + substream, + transport::{ + websocket::{stream::BufferedStream, substream::Substream}, + Endpoint, + }, + types::{protocol::ProtocolName, ConnectionId, SubstreamId}, + BandwidthSink, PeerId, +}; + +use futures::{future::BoxFuture, stream::FuturesUnordered, AsyncRead, AsyncWrite, StreamExt}; +use multiaddr::{multihash::Multihash, Multiaddr, Protocol}; +use tokio::net::TcpStream; +use tokio_tungstenite::{MaybeTlsStream, WebSocketStream}; +use tokio_util::compat::FuturesAsyncReadCompatExt; +use url::Url; + +use std::{collections::HashMap, time::Duration}; + +mod schema { + pub(super) mod noise { + include!(concat!(env!("OUT_DIR"), "/noise.rs")); + } +} + +/// Logging target for the file. +const LOG_TARGET: &str = "litep2p::websocket::connection"; + +/// Negotiated substream and its context. +pub struct NegotiatedSubstream { + /// Substream direction. + direction: Direction, + + /// Substream ID. + substream_id: SubstreamId, + + /// Protocol name. + protocol: ProtocolName, + + /// Yamux substream. + io: crate::yamux::Stream, + + /// Permit. + permit: Permit, + + /// Whether this substream keeps connection alive while it exists. + keep_alive: SubstreamKeepAlive, +} + +/// WebSocket connection error. +#[derive(Debug)] +enum ConnectionError { + /// Timeout + Timeout { + /// Protocol. + protocol: Option, + + /// Substream ID. + substream_id: Option, + }, + + /// Failed to negotiate connection/substream. + FailedToNegotiate { + /// Protocol. + protocol: Option, + + /// Substream ID. + substream_id: Option, + + /// Error. + error: SubstreamError, + }, +} + +/// Negotiated connection. +pub(super) struct NegotiatedConnection { + /// Remote peer ID. + peer: PeerId, + + /// Endpoint. + endpoint: Endpoint, + + /// Yamux connection. + connection: + crate::yamux::ControlledConnection>>>, + + /// Yamux control. + control: crate::yamux::Control, +} + +impl std::fmt::Debug for NegotiatedConnection { + fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result { + f.debug_struct("NegotiatedConnection") + .field("peer", &self.peer) + .field("endpoint", &self.endpoint) + .finish() + } +} + +impl NegotiatedConnection { + /// Get `ConnectionId` of the negotiated connection. + pub fn connection_id(&self) -> ConnectionId { + self.endpoint.connection_id() + } + + /// Get `PeerId` of the negotiated connection. + pub fn peer(&self) -> PeerId { + self.peer + } + + /// Get `Endpoint` of the negotiated connection. + pub fn endpoint(&self) -> Endpoint { + self.endpoint.clone() + } +} + +/// WebSocket connection. +pub(crate) struct WebSocketConnection { + /// Protocol context. + protocol_set: ProtocolSet, + + /// Yamux connection. + connection: + crate::yamux::ControlledConnection>>>, + + /// Yamux control. + control: crate::yamux::Control, + + /// Remote peer ID. + peer: PeerId, + + /// Endpoint. + _endpoint: Endpoint, + + /// Substream open timeout. + substream_open_timeout: Duration, + + /// Connection ID. + connection_id: ConnectionId, + + /// Bandwidth sink. + bandwidth_sink: BandwidthSink, + + /// Pending substreams. + pending_substreams: + FuturesUnordered>>, +} + +impl WebSocketConnection { + /// Create new [`WebSocketConnection`]. + pub(super) fn new( + connection: NegotiatedConnection, + protocol_set: ProtocolSet, + bandwidth_sink: BandwidthSink, + substream_open_timeout: Duration, + ) -> Self { + let NegotiatedConnection { + peer, + endpoint, + connection, + control, + } = connection; + + Self { + connection_id: endpoint.connection_id(), + protocol_set, + connection, + control, + peer, + _endpoint: endpoint, + bandwidth_sink, + substream_open_timeout, + pending_substreams: FuturesUnordered::new(), + } + } + + /// Negotiate protocol. + async fn negotiate_protocol( + stream: S, + role: &Role, + protocols: Vec<&str>, + substream_open_timeout: Duration, + ) -> Result<(Negotiated, ProtocolName), NegotiationError> { + tracing::trace!(target: LOG_TARGET, ?protocols, "negotiating protocols"); + + match tokio::time::timeout(substream_open_timeout, async move { + match role { + Role::Dialer => dialer_select_proto(stream, protocols, Version::V1).await, + Role::Listener => listener_select_proto(stream, protocols).await, + } + }) + .await + { + Err(_) => Err(NegotiationError::Timeout), + Ok(Err(error)) => Err(NegotiationError::MultistreamSelectError(error)), + Ok(Ok((protocol, socket))) => { + tracing::trace!(target: LOG_TARGET, ?protocol, "protocol negotiated"); + + Ok((socket, ProtocolName::from(protocol.to_string()))) + } + } + } + + /// Open WebSocket connection. + pub(super) async fn open_connection( + connection_id: ConnectionId, + keypair: Keypair, + stream: WebSocketStream>, + address: Multiaddr, + dialed_peer: PeerId, + ws_address: Url, + yamux_config: crate::yamux::Config, + max_read_ahead_factor: usize, + max_write_buffer_size: usize, + substream_open_timeout: Duration, + ) -> Result { + tracing::trace!( + target: LOG_TARGET, + ?address, + ?ws_address, + ?connection_id, + "open connection to remote peer", + ); + + Self::negotiate_connection( + stream, + Some(dialed_peer), + Role::Dialer, + address, + connection_id, + keypair, + yamux_config, + max_read_ahead_factor, + max_write_buffer_size, + substream_open_timeout, + ) + .await + } + + /// Accept WebSocket connection. + pub(super) async fn accept_connection( + stream: TcpStream, + connection_id: ConnectionId, + keypair: Keypair, + address: Multiaddr, + yamux_config: crate::yamux::Config, + max_read_ahead_factor: usize, + max_write_buffer_size: usize, + substream_open_timeout: Duration, + ) -> Result { + let stream = MaybeTlsStream::Plain(stream); + + Self::negotiate_connection( + tokio_tungstenite::accept_async(stream) + .await + .map_err(NegotiationError::WebSocket)?, + None, + Role::Listener, + address, + connection_id, + keypair, + yamux_config, + max_read_ahead_factor, + max_write_buffer_size, + substream_open_timeout, + ) + .await + } + + /// Negotiate WebSocket connection. + pub(super) async fn negotiate_connection( + stream: WebSocketStream>, + dialed_peer: Option, + role: Role, + address: Multiaddr, + connection_id: ConnectionId, + keypair: Keypair, + yamux_config: crate::yamux::Config, + max_read_ahead_factor: usize, + max_write_buffer_size: usize, + substream_open_timeout: Duration, + ) -> Result { + tracing::trace!( + target: LOG_TARGET, + ?connection_id, + ?address, + ?role, + ?dialed_peer, + "negotiate connection" + ); + let stream = BufferedStream::new(stream); + + // negotiate `noise` + let (stream, _) = + Self::negotiate_protocol(stream, &role, vec!["/noise"], substream_open_timeout).await?; + + tracing::trace!( + target: LOG_TARGET, + "`multistream-select` and `noise` negotiated" + ); + + // perform noise handshake + let (stream, peer) = noise::handshake( + stream.inner(), + &keypair, + role, + max_read_ahead_factor, + max_write_buffer_size, + substream_open_timeout, + noise::HandshakeTransport::WebSocket, + ) + .await?; + + if let Some(dialed_peer) = dialed_peer { + if peer != dialed_peer { + return Err(NegotiationError::PeerIdMismatch(dialed_peer, peer)); + } + } + + let stream: NoiseSocket> = stream; + tracing::trace!(target: LOG_TARGET, "noise handshake done"); + + // negotiate `yamux` + let (stream, _) = + Self::negotiate_protocol(stream, &role, vec!["/yamux/1.0.0"], substream_open_timeout) + .await?; + tracing::trace!(target: LOG_TARGET, "`yamux` negotiated"); + + let connection = crate::yamux::Connection::new(stream.inner(), yamux_config, role.into()); + let (control, connection) = crate::yamux::Control::new(connection); + + let address = match role { + Role::Dialer => address, + Role::Listener => address.with(Protocol::P2p(Multihash::from(peer))), + }; + + Ok(NegotiatedConnection { + peer, + control, + connection, + endpoint: match role { + Role::Dialer => Endpoint::dialer(address, connection_id), + Role::Listener => Endpoint::listener(address, connection_id), + }, + }) + } + + /// Accept substream. + pub async fn accept_substream( + stream: crate::yamux::Stream, + permit: Permit, + substream_id: SubstreamId, + protocols: HashMap, + substream_open_timeout: Duration, + ) -> Result { + tracing::trace!( + target: LOG_TARGET, + ?substream_id, + "accept inbound substream" + ); + + let protocol_names = protocols.keys().map(|protocol| &**protocol).collect::>(); + let (io, protocol) = Self::negotiate_protocol( + stream, + &Role::Listener, + protocol_names, + substream_open_timeout, + ) + .await?; + let keep_alive = *protocols.get(&protocol).expect("protocol to be one of the keys"); + + tracing::trace!( + target: LOG_TARGET, + ?substream_id, + "substream accepted and negotiated" + ); + + Ok(NegotiatedSubstream { + io: io.inner(), + direction: Direction::Inbound, + substream_id, + protocol, + permit, + keep_alive, + }) + } + + /// Open substream for `protocol`. + pub async fn open_substream( + mut control: crate::yamux::Control, + permit: Permit, + substream_id: SubstreamId, + protocol: ProtocolName, + fallback_names: Vec, + substream_open_timeout: Duration, + keep_alive: SubstreamKeepAlive, + ) -> Result { + tracing::debug!(target: LOG_TARGET, ?protocol, ?substream_id, "open substream"); + + let stream = match control.open_stream().await { + Ok(stream) => { + tracing::trace!(target: LOG_TARGET, ?substream_id, "substream opened"); + stream + } + Err(error) => { + tracing::debug!( + target: LOG_TARGET, + ?substream_id, + ?error, + "failed to open substream" + ); + return Err(SubstreamError::YamuxError( + error, + Direction::Outbound(substream_id), + )); + } + }; + + // TODO: https://github.com/paritytech/litep2p/issues/346 protocols don't change after + // they've been initialized so this should be done only once + let protocols = std::iter::once(&*protocol) + .chain(fallback_names.iter().map(|protocol| &**protocol)) + .collect(); + + let (io, protocol) = + Self::negotiate_protocol(stream, &Role::Dialer, protocols, substream_open_timeout) + .await?; + + Ok(NegotiatedSubstream { + io: io.inner(), + substream_id, + direction: Direction::Outbound(substream_id), + protocol, + permit, + keep_alive, + }) + } + + /// Start the connection event loop without notifying protocols. + /// This is used when protocols have already been notified during accept(). + pub(crate) async fn start(mut self) -> crate::Result<()> { + loop { + tokio::select! { + substream = self.connection.next() => match substream { + Some(Ok(stream)) => { + let substream = self.protocol_set.next_substream_id(); + let protocols = self.protocol_set.protocols_with_keep_alives(); + let permit = self.protocol_set.try_get_permit().ok_or(Error::ConnectionClosed)?; + let substream_open_timeout = self.substream_open_timeout; + + self.pending_substreams.push(Box::pin(async move { + match tokio::time::timeout( + substream_open_timeout, + Self::accept_substream(stream, permit, substream, protocols, substream_open_timeout), + ) + .await + { + Ok(Ok(substream)) => Ok(substream), + Ok(Err(error)) => Err(ConnectionError::FailedToNegotiate { + protocol: None, + substream_id: None, + error: SubstreamError::NegotiationError(error), + }), + Err(_) => Err(ConnectionError::Timeout { + protocol: None, + substream_id: None + }), + } + })); + }, + Some(Err(error)) => { + tracing::debug!( + target: LOG_TARGET, + peer = ?self.peer, + ?error, + "connection closed with error" + ); + self.protocol_set.report_connection_closed(self.peer, self.connection_id).await?; + + return Ok(()) + } + None => { + tracing::debug!(target: LOG_TARGET, peer = ?self.peer, "connection closed"); + self.protocol_set.report_connection_closed(self.peer, self.connection_id).await?; + + return Ok(()) + } + }, + substream = self.pending_substreams.select_next_some(), if !self.pending_substreams.is_empty() => { + match substream { + Err(error) => { + tracing::debug!( + target: LOG_TARGET, + ?error, + "failed to accept/open substream", + ); + + let (protocol, substream_id, error) = match error { + ConnectionError::Timeout { protocol, substream_id } => { + (protocol, substream_id, SubstreamError::NegotiationError(NegotiationError::Timeout)) + } + ConnectionError::FailedToNegotiate { protocol, substream_id, error } => { + (protocol, substream_id, error) + } + }; + + if let (Some(protocol), Some(substream_id)) = (protocol, substream_id) { + self.protocol_set + .report_substream_open_failure(protocol, substream_id, error) + .await?; + } + } + Ok(substream) => { + let protocol = substream.protocol.clone(); + let direction = substream.direction; + let substream_id = substream.substream_id; + let socket = FuturesAsyncReadCompatExt::compat(substream.io); + let bandwidth_sink = self.bandwidth_sink.clone(); + let opening_permit = substream.permit; + let lifetime_permit = + substream.keep_alive.then(|| opening_permit.clone()); + + let substream = substream::Substream::new_websocket( + self.peer, + substream_id, + Substream::new(socket, bandwidth_sink, lifetime_permit), + self.protocol_set.protocol_codec(&protocol) + ); + + self.protocol_set.report_substream_open( + self.peer, + protocol, + direction, + substream, + opening_permit, + ).await?; + } + } + } + protocol = self.protocol_set.next() => match protocol { + Some(ProtocolCommand::OpenSubstream { + protocol, + fallback_names, + substream_id, + permit, + keep_alive, + connection_id: _, + }) => { + let control = self.control.clone(); + let substream_open_timeout = self.substream_open_timeout; + + tracing::trace!( + target: LOG_TARGET, + ?protocol, + ?substream_id, + "open substream" + ); + + self.pending_substreams.push(Box::pin(async move { + match tokio::time::timeout( + substream_open_timeout, + Self::open_substream( + control, + permit, + substream_id, + protocol.clone(), + fallback_names, + substream_open_timeout, + keep_alive, + ), + ) + .await + { + Ok(Ok(substream)) => Ok(substream), + Ok(Err(error)) => Err(ConnectionError::FailedToNegotiate { + protocol: Some(protocol), + substream_id: Some(substream_id), + error, + }), + Err(_) => Err(ConnectionError::Timeout { + protocol: Some(protocol), + substream_id: Some(substream_id) + }), + } + })); + } + Some(ProtocolCommand::ForceClose) => { + tracing::debug!( + target: LOG_TARGET, + peer = ?self.peer, + connection_id = ?self.connection_id, + "force closing connection", + ); + + return self.protocol_set.report_connection_closed(self.peer, self.connection_id).await + } + None => { + tracing::debug!(target: LOG_TARGET, "protocols have exited, shutting down connection"); + return self.protocol_set.report_connection_closed(self.peer, self.connection_id).await + } + } + } + } + } +} + +#[cfg(test)] +mod tests { + use crate::transport::websocket::WebSocketTransport; + + use super::*; + use futures::AsyncWriteExt; + use hickory_resolver::TokioResolver; + use std::sync::Arc; + use tokio::net::TcpListener; + + #[tokio::test] + async fn multistream_select_not_supported_dialer() { + let _ = tracing_subscriber::fmt() + .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) + .try_init(); + + let listener = TcpListener::bind("[::1]:0").await.unwrap(); + let address = listener.local_addr().unwrap(); + + tokio::spawn(async move { + let (stream, _) = listener.accept().await.unwrap(); + // Negotiate websocket. + let stream = tokio_tungstenite::accept_async(stream).await.unwrap(); + let mut stream = BufferedStream::new(stream); + stream.write_all(&vec![0x12u8; 256]).await.unwrap(); + }); + + let peer_id = PeerId::random(); + let address = Multiaddr::empty() + .with(Protocol::from(address.ip())) + .with(Protocol::Tcp(address.port())) + .with(Protocol::Ws(std::borrow::Cow::Borrowed("/"))) + .with(Protocol::P2p(peer_id.into())); + + let (url, peer) = WebSocketTransport::multiaddr_into_url(address.clone()).unwrap(); + + let (_, stream) = WebSocketTransport::dial_peer( + address.clone(), + Default::default(), + Duration::from_secs(10), + false, + Arc::new(TokioResolver::builder_tokio().unwrap().build()), + ) + .await + .unwrap(); + + match WebSocketConnection::open_connection( + ConnectionId::from(0usize), + Keypair::generate(), + stream, + address.clone(), + peer, + url, + Default::default(), + 5, + 2, + Duration::from_secs(10), + ) + .await + { + Ok(_) => panic!("connection was supposed to fail"), + Err(NegotiationError::MultistreamSelectError( + crate::multistream_select::NegotiationError::ProtocolError(_), + )) => {} + Err(error) => panic!("invalid error: {error:?}"), + } + } + + #[tokio::test] + async fn multistream_select_not_supported_listener() { + let _ = tracing_subscriber::fmt() + .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) + .try_init(); + + let listener = TcpListener::bind("[::1]:0").await.unwrap(); + let address = listener.local_addr().unwrap(); + + let (Ok(dialer), Ok((stream, dialer_address))) = + tokio::join!(TcpStream::connect(address), listener.accept(),) + else { + panic!("failed to establish connection"); + }; + + let peer_id = PeerId::random(); + let dialer_address = Multiaddr::empty() + .with(Protocol::from(dialer_address.ip())) + .with(Protocol::Tcp(dialer_address.port())) + .with(Protocol::Ws(std::borrow::Cow::Borrowed("/"))) + .with(Protocol::P2p(peer_id.into())); + + let (url, _peer) = WebSocketTransport::multiaddr_into_url(dialer_address.clone()).unwrap(); + + tokio::spawn(async move { + // Negotiate websocket. + let stream = tokio_tungstenite::client_async_tls(url, dialer).await.unwrap().0; + let mut dialer = BufferedStream::new(stream); + let _ = dialer.write_all(&vec![0x12u8; 256]).await; + }); + + match WebSocketConnection::accept_connection( + stream, + ConnectionId::from(0usize), + Keypair::generate(), + dialer_address, + Default::default(), + 5, + 2, + Duration::from_secs(10), + ) + .await + { + Ok(_) => panic!("connection was supposed to fail"), + Err(NegotiationError::MultistreamSelectError( + crate::multistream_select::NegotiationError::ProtocolError(_), + )) => {} + Err(error) => panic!("invalid error: {error:?}"), + } + } + + #[tokio::test] + async fn noise_not_supported_dialer() { + let _ = tracing_subscriber::fmt() + .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) + .try_init(); + + let listener = TcpListener::bind("[::1]:0").await.unwrap(); + let address = listener.local_addr().unwrap(); + + tokio::spawn(async move { + let (stream, _) = listener.accept().await.unwrap(); + let stream = tokio_tungstenite::accept_async(stream).await.unwrap(); + let stream = BufferedStream::new(stream); + + // attempt to negotiate yamux, skipping noise entirely + assert!(WebSocketConnection::negotiate_protocol( + stream, + &Role::Listener, + vec!["/yamux/1.0.0"], + std::time::Duration::from_secs(10), + ) + .await + .is_err()); + }); + + let peer_id = PeerId::random(); + let address = Multiaddr::empty() + .with(Protocol::from(address.ip())) + .with(Protocol::Tcp(address.port())) + .with(Protocol::Ws(std::borrow::Cow::Borrowed("/"))) + .with(Protocol::P2p(peer_id.into())); + + let (url, peer) = WebSocketTransport::multiaddr_into_url(address.clone()).unwrap(); + let (_, stream) = WebSocketTransport::dial_peer( + address.clone(), + Default::default(), + Duration::from_secs(10), + false, + Arc::new(TokioResolver::builder_tokio().unwrap().build()), + ) + .await + .unwrap(); + + match WebSocketConnection::open_connection( + ConnectionId::from(0usize), + Keypair::generate(), + stream, + address.clone(), + peer, + url, + Default::default(), + 5, + 2, + Duration::from_secs(10), + ) + .await + { + Ok(_) => panic!("connection was supposed to fail"), + Err(NegotiationError::MultistreamSelectError( + crate::multistream_select::NegotiationError::Failed, + )) => {} + Err(error) => panic!("invalid error: {error:?}"), + } + } + + #[tokio::test] + async fn noise_not_supported_listener() { + let _ = tracing_subscriber::fmt() + .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) + .try_init(); + + let listener = TcpListener::bind("[::1]:0").await.unwrap(); + let address = listener.local_addr().unwrap(); + + let (Ok(dialer), Ok((stream, dialer_address))) = + tokio::join!(TcpStream::connect(address), listener.accept(),) + else { + panic!("failed to establish connection"); + }; + + let peer_id = PeerId::random(); + let dialer_address = Multiaddr::empty() + .with(Protocol::from(dialer_address.ip())) + .with(Protocol::Tcp(dialer_address.port())) + .with(Protocol::Ws(std::borrow::Cow::Borrowed("/"))) + .with(Protocol::P2p(peer_id.into())); + + let (url, _peer) = WebSocketTransport::multiaddr_into_url(dialer_address.clone()).unwrap(); + + tokio::spawn(async move { + // Negotiate websocket. + let stream = tokio_tungstenite::client_async_tls(url, dialer).await.unwrap().0; + let dialer = BufferedStream::new(stream); + + // attempt to negotiate yamux, skipping noise entirely + assert!(WebSocketConnection::negotiate_protocol( + dialer, + &Role::Dialer, + vec!["/yamux/1.0.0"], + std::time::Duration::from_secs(10), + ) + .await + .is_err()); + }); + + match WebSocketConnection::accept_connection( + stream, + ConnectionId::from(0usize), + Keypair::generate(), + dialer_address, + Default::default(), + 5, + 2, + Duration::from_secs(10), + ) + .await + { + Ok(_) => panic!("connection was supposed to fail"), + Err(NegotiationError::MultistreamSelectError( + crate::multistream_select::NegotiationError::Failed, + )) => {} + Err(error) => panic!("invalid error: {error:?}"), + } + } + + #[tokio::test] + async fn noise_timeout_listener() { + let _ = tracing_subscriber::fmt() + .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) + .try_init(); + + let listener = TcpListener::bind("[::1]:0").await.unwrap(); + let address = listener.local_addr().unwrap(); + + let (Ok(dialer), Ok((stream, dialer_address))) = + tokio::join!(TcpStream::connect(address), listener.accept(),) + else { + panic!("failed to establish connection"); + }; + + let keypair = Keypair::generate(); + let peer_id = PeerId::from_public_key(&keypair.public().into()); + + let dialer_address = Multiaddr::empty() + .with(Protocol::from(dialer_address.ip())) + .with(Protocol::Tcp(dialer_address.port())) + .with(Protocol::Ws(std::borrow::Cow::Borrowed("/"))) + .with(Protocol::P2p(peer_id.into())); + + let (url, _peer) = WebSocketTransport::multiaddr_into_url(dialer_address.clone()).unwrap(); + + tokio::spawn(async move { + // Negotiate websocket. + let stream = tokio_tungstenite::client_async_tls(url, dialer).await.unwrap().0; + let dialer = BufferedStream::new(stream); + + // Sleep while negotiating /yamux. + let (stream, _proto) = WebSocketConnection::negotiate_protocol( + dialer, + &Role::Dialer, + vec!["/noise"], + std::time::Duration::from_secs(10), + ) + .await + .unwrap(); + + let (_stream, _peer) = noise::handshake( + stream.inner(), + &keypair, + Role::Dialer, + 5, + 2, + std::time::Duration::from_secs(10), + noise::HandshakeTransport::WebSocket, + ) + .await + .unwrap(); + + tokio::time::sleep(std::time::Duration::from_secs(60)).await; + }); + + match WebSocketConnection::accept_connection( + stream, + ConnectionId::from(0usize), + Keypair::generate(), + dialer_address, + Default::default(), + 5, + 2, + Duration::from_secs(10), + ) + .await + { + Ok(_) => panic!("connection was supposed to fail"), + Err(NegotiationError::Timeout) => {} + Err(error) => panic!("invalid error: {error:?}"), + } + } + + #[tokio::test] + async fn noise_wrong_handshake_listener() { + let _ = tracing_subscriber::fmt() + .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) + .try_init(); + + let listener = TcpListener::bind("[::1]:0").await.unwrap(); + let address = listener.local_addr().unwrap(); + + let (Ok(dialer), Ok((stream, dialer_address))) = + tokio::join!(TcpStream::connect(address), listener.accept(),) + else { + panic!("failed to establish connection"); + }; + + let peer_id = PeerId::random(); + + let dialer_address = Multiaddr::empty() + .with(Protocol::from(dialer_address.ip())) + .with(Protocol::Tcp(dialer_address.port())) + .with(Protocol::Ws(std::borrow::Cow::Borrowed("/"))) + .with(Protocol::P2p(peer_id.into())); + + let (url, _peer) = WebSocketTransport::multiaddr_into_url(dialer_address.clone()).unwrap(); + + tokio::spawn(async move { + // Negotiate websocket. + let stream = tokio_tungstenite::client_async_tls(url, dialer).await.unwrap().0; + let dialer = BufferedStream::new(stream); + + // Sleep while negotiating /yamux. + let (stream, _proto) = WebSocketConnection::negotiate_protocol( + dialer, + &Role::Dialer, + vec!["/noise"], + std::time::Duration::from_secs(10), + ) + .await + .unwrap(); + + // The next step is providing the noise handshake. However, we jump + // directly to negotiating yamux. + let (_stream, _proto) = WebSocketConnection::negotiate_protocol( + stream, + &Role::Dialer, + vec!["/yamux/1.0.0"], + std::time::Duration::from_secs(10), + ) + .await + .unwrap(); + + tokio::time::sleep(std::time::Duration::from_secs(60)).await; + }); + + match WebSocketConnection::accept_connection( + stream, + ConnectionId::from(0usize), + Keypair::generate(), + dialer_address, + Default::default(), + 5, + 2, + Duration::from_secs(10), + ) + .await + { + Ok(_) => panic!("connection was supposed to fail"), + Err(NegotiationError::Timeout) => {} + Err(error) => panic!("invalid error: {error:?}"), + } + } + + #[tokio::test] + async fn noise_timeout_dialer() { + let _ = tracing_subscriber::fmt() + .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) + .try_init(); + + let listener = TcpListener::bind("[::1]:0").await.unwrap(); + let address = listener.local_addr().unwrap(); + + tokio::spawn(async move { + let (stream, _) = listener.accept().await.unwrap(); + let stream = tokio_tungstenite::accept_async(stream).await.unwrap(); + let stream = BufferedStream::new(stream); + + let (_stream, _proto) = WebSocketConnection::negotiate_protocol( + stream, + &Role::Listener, + vec!["/noise"], + std::time::Duration::from_secs(10), + ) + .await + .unwrap(); + + tokio::time::sleep(std::time::Duration::from_secs(60)).await; + }); + + let peer_id = PeerId::random(); + let address = Multiaddr::empty() + .with(Protocol::from(address.ip())) + .with(Protocol::Tcp(address.port())) + .with(Protocol::Ws(std::borrow::Cow::Borrowed("/"))) + .with(Protocol::P2p(peer_id.into())); + + let (url, peer) = WebSocketTransport::multiaddr_into_url(address.clone()).unwrap(); + let (_, stream) = WebSocketTransport::dial_peer( + address.clone(), + Default::default(), + Duration::from_secs(10), + false, + Arc::new(TokioResolver::builder_tokio().unwrap().build()), + ) + .await + .unwrap(); + + match WebSocketConnection::open_connection( + ConnectionId::from(0usize), + Keypair::generate(), + stream, + address.clone(), + peer, + url, + Default::default(), + 5, + 2, + Duration::from_secs(10), + ) + .await + { + Ok(_) => panic!("connection was supposed to fail"), + Err(NegotiationError::Timeout) => {} + Err(error) => panic!("invalid error: {error:?}"), + } + } + + #[tokio::test] + async fn yamux_not_supported_dialer() { + let _ = tracing_subscriber::fmt() + .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) + .try_init(); + + let listener = TcpListener::bind("[::1]:0").await.unwrap(); + let address = listener.local_addr().unwrap(); + + let (Ok(dialer), Ok((stream, dialer_address))) = + tokio::join!(TcpStream::connect(address), listener.accept(),) + else { + panic!("failed to establish connection"); + }; + + let peer_id = PeerId::random(); + let dialer_address = Multiaddr::empty() + .with(Protocol::from(dialer_address.ip())) + .with(Protocol::Tcp(dialer_address.port())) + .with(Protocol::Ws(std::borrow::Cow::Borrowed("/"))) + .with(Protocol::P2p(peer_id.into())); + + let (url, _peer) = WebSocketTransport::multiaddr_into_url(dialer_address.clone()).unwrap(); + + tokio::spawn(async move { + // Negotiate websocket. + let stream = tokio_tungstenite::client_async_tls(url, dialer).await.unwrap().0; + let dialer = BufferedStream::new(stream); + + let (stream, _proto) = WebSocketConnection::negotiate_protocol( + dialer, + &Role::Dialer, + vec!["/noise"], + std::time::Duration::from_secs(10), + ) + .await + .unwrap(); + + // do a noise handshake + let keypair = Keypair::generate(); + let (stream, _peer) = noise::handshake( + stream.inner(), + &keypair, + Role::Dialer, + 5, + 2, + std::time::Duration::from_secs(10), + noise::HandshakeTransport::WebSocket, + ) + .await + .unwrap(); + + assert!(WebSocketConnection::negotiate_protocol( + stream, + &Role::Dialer, + vec!["/unsupported/1"], + std::time::Duration::from_secs(10), + ) + .await + .is_err()); + }); + + match WebSocketConnection::accept_connection( + stream, + ConnectionId::from(0usize), + Keypair::generate(), + dialer_address, + Default::default(), + 5, + 2, + Duration::from_secs(10), + ) + .await + { + Ok(_) => panic!("connection was supposed to fail"), + Err(NegotiationError::MultistreamSelectError( + crate::multistream_select::NegotiationError::Failed, + )) => {} + Err(error) => panic!("{error:?}"), + } + } + + #[tokio::test] + async fn yamux_not_supported_listener() { + let _ = tracing_subscriber::fmt() + .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) + .try_init(); + + let listener = TcpListener::bind("[::1]:0").await.unwrap(); + let address = listener.local_addr().unwrap(); + + let keypair = Keypair::generate(); + let peer_id = PeerId::from_public_key(&keypair.public().into()); + + tokio::spawn(async move { + let (stream, _) = listener.accept().await.unwrap(); + let stream = tokio_tungstenite::accept_async(stream).await.unwrap(); + let stream = BufferedStream::new(stream); + + let (stream, _proto) = WebSocketConnection::negotiate_protocol( + stream, + &Role::Listener, + vec!["/noise"], + std::time::Duration::from_secs(10), + ) + .await + .unwrap(); + + // do a noise handshake + let (stream, _peer) = noise::handshake( + stream.inner(), + &keypair, + Role::Listener, + 5, + 2, + std::time::Duration::from_secs(10), + noise::HandshakeTransport::WebSocket, + ) + .await + .unwrap(); + + assert!(WebSocketConnection::negotiate_protocol( + stream, + &Role::Listener, + vec!["/unsupported/1"], + std::time::Duration::from_secs(10), + ) + .await + .is_err()); + }); + + let address = Multiaddr::empty() + .with(Protocol::from(address.ip())) + .with(Protocol::Tcp(address.port())) + .with(Protocol::Ws(std::borrow::Cow::Borrowed("/"))) + .with(Protocol::P2p(peer_id.into())); + + let (url, peer) = WebSocketTransport::multiaddr_into_url(address.clone()).unwrap(); + let (_, stream) = WebSocketTransport::dial_peer( + address.clone(), + Default::default(), + Duration::from_secs(10), + false, + Arc::new(TokioResolver::builder_tokio().unwrap().build()), + ) + .await + .unwrap(); + + match WebSocketConnection::open_connection( + ConnectionId::from(0usize), + Keypair::generate(), + stream, + address.clone(), + peer, + url, + Default::default(), + 5, + 2, + Duration::from_secs(10), + ) + .await + { + Ok(_) => panic!("connection was supposed to fail"), + Err(NegotiationError::MultistreamSelectError( + crate::multistream_select::NegotiationError::Failed, + )) => {} + Err(error) => panic!("invalid error: {error:?}"), + } + } + + #[tokio::test] + async fn yamux_timeout_dialer() { + let _ = tracing_subscriber::fmt() + .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) + .try_init(); + + let listener = TcpListener::bind("[::1]:0").await.unwrap(); + let address = listener.local_addr().unwrap(); + + let (Ok(dialer), Ok((stream, dialer_address))) = + tokio::join!(TcpStream::connect(address), listener.accept(),) + else { + panic!("failed to establish connection"); + }; + + let peer_id = PeerId::random(); + let dialer_address = Multiaddr::empty() + .with(Protocol::from(dialer_address.ip())) + .with(Protocol::Tcp(dialer_address.port())) + .with(Protocol::Ws(std::borrow::Cow::Borrowed("/"))) + .with(Protocol::P2p(peer_id.into())); + + let (url, _peer) = WebSocketTransport::multiaddr_into_url(dialer_address.clone()).unwrap(); + + tokio::spawn(async move { + // Negotiate websocket. + let stream = tokio_tungstenite::client_async_tls(url, dialer).await.unwrap().0; + let dialer = BufferedStream::new(stream); + + let (stream, _proto) = WebSocketConnection::negotiate_protocol( + dialer, + &Role::Dialer, + vec!["/noise"], + std::time::Duration::from_secs(10), + ) + .await + .unwrap(); + + // do a noise handshake + let keypair = Keypair::generate(); + let (_stream, _peer) = noise::handshake( + stream.inner(), + &keypair, + Role::Dialer, + 5, + 2, + std::time::Duration::from_secs(10), + noise::HandshakeTransport::WebSocket, + ) + .await + .unwrap(); + + tokio::time::sleep(std::time::Duration::from_secs(60)).await; + }); + + match WebSocketConnection::accept_connection( + stream, + ConnectionId::from(0usize), + Keypair::generate(), + dialer_address, + Default::default(), + 5, + 2, + Duration::from_secs(10), + ) + .await + { + Ok(_) => panic!("connection was supposed to fail"), + Err(NegotiationError::Timeout) => {} + Err(error) => panic!("{error:?}"), + } + } + + #[tokio::test] + async fn yamux_timeout_listener() { + let _ = tracing_subscriber::fmt() + .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) + .try_init(); + + let listener = TcpListener::bind("[::1]:0").await.unwrap(); + let address = listener.local_addr().unwrap(); + + let keypair = Keypair::generate(); + let peer_id = PeerId::from_public_key(&keypair.public().into()); + + tokio::spawn(async move { + let (stream, _) = listener.accept().await.unwrap(); + let stream = tokio_tungstenite::accept_async(stream).await.unwrap(); + let stream = BufferedStream::new(stream); + + let (stream, _proto) = WebSocketConnection::negotiate_protocol( + stream, + &Role::Listener, + vec!["/noise"], + std::time::Duration::from_secs(10), + ) + .await + .unwrap(); + + // do a noise handshake + let (_stream, _peer) = noise::handshake( + stream.inner(), + &keypair, + Role::Listener, + 5, + 2, + std::time::Duration::from_secs(10), + noise::HandshakeTransport::WebSocket, + ) + .await + .unwrap(); + + tokio::time::sleep(std::time::Duration::from_secs(60)).await; + }); + + let address = Multiaddr::empty() + .with(Protocol::from(address.ip())) + .with(Protocol::Tcp(address.port())) + .with(Protocol::Ws(std::borrow::Cow::Borrowed("/"))) + .with(Protocol::P2p(peer_id.into())); + + let (url, peer) = WebSocketTransport::multiaddr_into_url(address.clone()).unwrap(); + let (_, stream) = WebSocketTransport::dial_peer( + address.clone(), + Default::default(), + Duration::from_secs(10), + false, + Arc::new(TokioResolver::builder_tokio().unwrap().build()), + ) + .await + .unwrap(); + + match WebSocketConnection::open_connection( + ConnectionId::from(0usize), + Keypair::generate(), + stream, + address.clone(), + peer, + url, + Default::default(), + 5, + 2, + Duration::from_secs(10), + ) + .await + { + Ok(_) => panic!("connection was supposed to fail"), + Err(NegotiationError::Timeout) => {} + Err(error) => panic!("invalid error: {error:?}"), + } + } +} diff --git a/client/litep2p/src/transport/websocket/mod.rs b/client/litep2p/src/transport/websocket/mod.rs new file mode 100644 index 00000000..a6bf4522 --- /dev/null +++ b/client/litep2p/src/transport/websocket/mod.rs @@ -0,0 +1,766 @@ +// Copyright 2023 litep2p developers +// +// Permission is hereby granted, free of charge, to any person obtaining a +// copy of this software and associated documentation files (the "Software"), +// to deal in the Software without restriction, including without limitation +// the rigts to use, copy, modify, merge, publish, distribute, sublicense, +// and/or sell copies of the Software, and to permit persons to whom the +// Software is furnished to do so, subject to the following conditions: +// +// The above copyright notice and this permission notice shall be included in +// all copies or substantial portions of the Software. +// +// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS +// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE +// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER +// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING +// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER +// DEALINGS IN THE SOFTWARE. + +//! WebSocket transport. + +use crate::{ + error::{AddressError, Error, NegotiationError}, + transport::{ + common::listener::{DialAddresses, GetSocketAddr, SocketListener, WebSocketAddress}, + manager::TransportHandle, + websocket::{ + config::Config, + connection::{NegotiatedConnection, WebSocketConnection}, + }, + Transport, TransportBuilder, TransportEvent, DIAL_DEADLINE_MULTIPLIER, + }, + types::ConnectionId, + utils::futures_stream::FuturesStream, + DialError, PeerId, +}; + +use futures::{future::BoxFuture, stream::AbortHandle, Stream, StreamExt, TryFutureExt}; +use hickory_resolver::TokioResolver; +use multiaddr::{Multiaddr, Protocol}; +use socket2::{Domain, Socket, Type}; +use std::{net::SocketAddr, sync::Arc}; +use tokio::net::TcpStream; +use tokio_tungstenite::{MaybeTlsStream, WebSocketStream}; + +use url::Url; + +use std::{ + collections::HashMap, + pin::Pin, + task::{Context, Poll}, + time::Duration, +}; + +pub(crate) use substream::Substream; + +mod connection; +mod stream; +mod substream; + +pub mod config; + +/// Logging target for the file. +const LOG_TARGET: &str = "litep2p::websocket"; + +/// Pending inbound connection. +struct PendingInboundConnection { + /// Socket address of the remote peer. + connection: TcpStream, + /// Address of the remote peer. + address: SocketAddr, +} + +#[derive(Debug)] +enum RawConnectionResult { + /// The first successful connection. + Connected { + negotiated: NegotiatedConnection, + errors: Vec<(Multiaddr, DialError)>, + }, + + /// All connection attempts failed. + Failed { + connection_id: ConnectionId, + errors: Vec<(Multiaddr, DialError)>, + }, + + /// Future was canceled. + Canceled { connection_id: ConnectionId }, +} + +/// WebSocket transport. +pub(crate) struct WebSocketTransport { + /// Transport context. + context: TransportHandle, + + /// Transport configuration. + config: Config, + + /// WebSocket listener. + listener: SocketListener, + + /// Dial addresses. + dial_addresses: DialAddresses, + + /// Pending dials. + pending_dials: HashMap, + + /// Pending inbound connections. + pending_inbound_connections: HashMap, + + /// Pending connections. + pending_connections: + FuturesStream>>, + + /// Pending raw, unnegotiated connections. + pending_raw_connections: FuturesStream>, + + /// Opened raw connection, waiting for approval/rejection from `TransportManager`. + opened: HashMap, + + /// Cancel raw connections futures. + /// + /// This is cancelling `Self::pending_raw_connections`. + cancel_futures: HashMap, + + /// Negotiated connections waiting validation. + pending_open: HashMap, + + /// DNS resolver. + resolver: Arc, +} + +impl WebSocketTransport { + /// Handle inbound connection. + fn on_inbound_connection( + &mut self, + connection_id: ConnectionId, + connection: TcpStream, + address: SocketAddr, + ) { + let keypair = self.context.keypair.clone(); + let yamux_config = self.config.yamux_config.clone(); + let connection_open_timeout = self.config.connection_open_timeout; + let max_read_ahead_factor = self.config.noise_read_ahead_frame_count; + let max_write_buffer_size = self.config.noise_write_buffer_size; + let substream_open_timeout = self.config.substream_open_timeout; + let address = Multiaddr::empty() + .with(Protocol::from(address.ip())) + .with(Protocol::Tcp(address.port())) + .with(Protocol::Ws(std::borrow::Cow::Borrowed("/"))); + + self.pending_connections.push(Box::pin(async move { + match tokio::time::timeout(connection_open_timeout, async move { + WebSocketConnection::accept_connection( + connection, + connection_id, + keypair, + address, + yamux_config, + max_read_ahead_factor, + max_write_buffer_size, + substream_open_timeout, + ) + .await + .map_err(|error| (connection_id, error.into())) + }) + .await + { + Err(_) => Err((connection_id, DialError::Timeout)), + Ok(Err(error)) => Err(error), + Ok(Ok(result)) => Ok(result), + } + })); + } + + /// Convert `Multiaddr` into `url::Url` + fn multiaddr_into_url(address: Multiaddr) -> Result<(Url, PeerId), AddressError> { + let mut protocol_stack = address.iter(); + + let dial_address = match protocol_stack.next().ok_or(AddressError::InvalidProtocol)? { + Protocol::Ip4(address) => address.to_string(), + Protocol::Ip6(address) => format!("[{address}]"), + Protocol::Dns(address) | Protocol::Dns4(address) | Protocol::Dns6(address) => + address.to_string(), + + _ => return Err(AddressError::InvalidProtocol), + }; + + let url = match protocol_stack.next().ok_or(AddressError::InvalidProtocol)? { + Protocol::Tcp(port) => match protocol_stack.next() { + Some(Protocol::Ws(_)) => format!("ws://{dial_address}:{port}/"), + Some(Protocol::Wss(_)) => format!("wss://{dial_address}:{port}/"), + _ => return Err(AddressError::InvalidProtocol), + }, + _ => return Err(AddressError::InvalidProtocol), + }; + + let peer = match protocol_stack.next() { + Some(Protocol::P2p(multihash)) => PeerId::from_multihash(multihash)?, + protocol => { + tracing::warn!( + target: LOG_TARGET, + ?protocol, + "invalid protocol, expected `Protocol::Ws`/`Protocol::Wss`", + ); + return Err(AddressError::PeerIdMissing); + } + }; + + tracing::trace!(target: LOG_TARGET, ?url, "parse address"); + + url::Url::parse(&url) + .map(|url| (url, peer)) + .map_err(|_| AddressError::InvalidUrl) + } + + /// Dial remote peer over `address`. + async fn dial_peer( + address: Multiaddr, + dial_addresses: DialAddresses, + connection_open_timeout: Duration, + nodelay: bool, + resolver: Arc, + ) -> Result<(Multiaddr, WebSocketStream>), DialError> { + let (url, _) = Self::multiaddr_into_url(address.clone())?; + + let (socket_address, _) = WebSocketAddress::multiaddr_to_socket_address(&address)?; + let remote_address = + match tokio::time::timeout(connection_open_timeout, socket_address.lookup_ip(resolver)) + .await + { + Err(_) => return Err(DialError::Timeout), + Ok(Err(error)) => return Err(error.into()), + Ok(Ok(address)) => address, + }; + + let domain = match remote_address.is_ipv4() { + true => Domain::IPV4, + false => Domain::IPV6, + }; + let socket = Socket::new(domain, Type::STREAM, Some(socket2::Protocol::TCP))?; + if remote_address.is_ipv6() { + socket.set_only_v6(true)?; + } + socket.set_nonblocking(true)?; + socket.set_nodelay(nodelay)?; + + match dial_addresses.local_dial_address(&remote_address.ip()) { + Ok(Some(dial_address)) => { + socket.set_reuse_address(true)?; + #[cfg(unix)] + socket.set_reuse_port(true)?; + socket.bind(&dial_address.into())?; + } + Ok(None) => {} + Err(()) => { + tracing::debug!( + target: LOG_TARGET, + ?remote_address, + "tcp listener not enabled for remote address, using ephemeral port", + ); + } + } + + let future = async move { + match socket.connect(&remote_address.into()) { + Ok(()) => {} + Err(error) if error.raw_os_error() == Some(libc::EINPROGRESS) => {} + Err(error) if error.kind() == std::io::ErrorKind::WouldBlock => {} + Err(err) => return Err(DialError::from(err)), + } + + let stream = TcpStream::try_from(Into::::into(socket))?; + stream.writable().await?; + if let Some(e) = stream.take_error()? { + return Err(DialError::from(e)); + } + + Ok(( + address, + tokio_tungstenite::client_async_tls(url, stream) + .await + .map_err(NegotiationError::WebSocket)? + .0, + )) + }; + + match tokio::time::timeout(connection_open_timeout, future).await { + Err(_) => Err(DialError::Timeout), + Ok(Err(error)) => Err(error), + Ok(Ok((address, stream))) => Ok((address, stream)), + } + } +} + +impl TransportBuilder for WebSocketTransport { + type Config = Config; + type Transport = WebSocketTransport; + + /// Create new [`Transport`] object. + fn new( + context: TransportHandle, + mut config: Self::Config, + resolver: Arc, + ) -> crate::Result<(Self, Vec)> + where + Self: Sized, + { + tracing::debug!( + target: LOG_TARGET, + listen_addresses = ?config.listen_addresses, + "start websocket transport", + ); + let (listener, listen_addresses, dial_addresses) = SocketListener::new::( + std::mem::take(&mut config.listen_addresses), + config.reuse_port, + config.nodelay, + ); + + Ok(( + Self { + listener, + config, + context, + dial_addresses, + opened: HashMap::new(), + pending_open: HashMap::new(), + pending_dials: HashMap::new(), + pending_inbound_connections: HashMap::new(), + pending_connections: FuturesStream::new(), + pending_raw_connections: FuturesStream::new(), + cancel_futures: HashMap::new(), + resolver, + }, + listen_addresses, + )) + } +} + +impl Transport for WebSocketTransport { + fn dial(&mut self, connection_id: ConnectionId, address: Multiaddr) -> crate::Result<()> { + let yamux_config = self.config.yamux_config.clone(); + let keypair = self.context.keypair.clone(); + let (ws_address, peer) = Self::multiaddr_into_url(address.clone())?; + let connection_open_timeout = self.config.connection_open_timeout; + let max_read_ahead_factor = self.config.noise_read_ahead_frame_count; + let max_write_buffer_size = self.config.noise_write_buffer_size; + let substream_open_timeout = self.config.substream_open_timeout; + let dial_addresses = self.dial_addresses.clone(); + let nodelay = self.config.nodelay; + let resolver = self.resolver.clone(); + + self.pending_dials.insert(connection_id, address.clone()); + + tracing::debug!(target: LOG_TARGET, ?connection_id, ?address, "open connection"); + + let future = async move { + let (_, stream) = WebSocketTransport::dial_peer( + address.clone(), + dial_addresses, + connection_open_timeout, + nodelay, + resolver, + ) + .await + .map_err(|error| (connection_id, error))?; + + WebSocketConnection::open_connection( + connection_id, + keypair, + stream, + address, + peer, + ws_address, + yamux_config, + max_read_ahead_factor, + max_write_buffer_size, + substream_open_timeout, + ) + .await + .map_err(|error| (connection_id, error.into())) + }; + + self.pending_connections.push(Box::pin(async move { + match tokio::time::timeout(connection_open_timeout, future).await { + Err(_) => Err((connection_id, DialError::Timeout)), + Ok(Err(error)) => Err(error), + Ok(Ok(result)) => Ok(result), + } + })); + + Ok(()) + } + + fn accept( + &mut self, + connection_id: ConnectionId, + ) -> crate::Result>> { + let context = self + .pending_open + .remove(&connection_id) + .ok_or(Error::ConnectionDoesntExist(connection_id))?; + let mut protocol_set = self.context.protocol_set(connection_id); + let bandwidth_sink = self.context.bandwidth_sink.clone(); + let substream_open_timeout = self.config.substream_open_timeout; + let executor = self.context.executor.clone(); + + tracing::trace!( + target: LOG_TARGET, + ?connection_id, + "start connection", + ); + + let peer = context.peer(); + let endpoint = context.endpoint(); + + Ok(Box::pin(async move { + // First, notify all protocols about the connection establishment + protocol_set.report_connection_established(peer, endpoint).await?; + + // After protocols are notified, spawn the connection event loop + executor.run(Box::pin(async move { + if let Err(error) = WebSocketConnection::new( + context, + protocol_set, + bandwidth_sink, + substream_open_timeout, + ) + .start() + .await + { + tracing::debug!( + target: LOG_TARGET, + ?connection_id, + ?error, + "connection exited with error", + ); + } + })); + + Ok(()) + })) + } + + fn reject(&mut self, connection_id: ConnectionId) -> crate::Result<()> { + self.pending_open + .remove(&connection_id) + .map_or(Err(Error::ConnectionDoesntExist(connection_id)), |_| Ok(())) + } + + fn accept_pending(&mut self, connection_id: ConnectionId) -> crate::Result<()> { + let pending = self.pending_inbound_connections.remove(&connection_id).ok_or_else(|| { + tracing::error!( + target: LOG_TARGET, + ?connection_id, + "Cannot accept non existent pending connection", + ); + + Error::ConnectionDoesntExist(connection_id) + })?; + + self.on_inbound_connection(connection_id, pending.connection, pending.address); + + Ok(()) + } + + fn reject_pending(&mut self, connection_id: ConnectionId) -> crate::Result<()> { + self.pending_inbound_connections.remove(&connection_id).map_or_else( + || { + tracing::error!( + target: LOG_TARGET, + ?connection_id, + "Cannot reject non existent pending connection", + ); + + Err(Error::ConnectionDoesntExist(connection_id)) + }, + |_| Ok(()), + ) + } + + fn open( + &mut self, + connection_id: ConnectionId, + addresses: Vec, + ) -> crate::Result<()> { + let num_addresses = addresses.len(); + + let yamux_config = self.config.yamux_config.clone(); + let keypair = self.context.keypair.clone(); + let connection_open_timeout = self.config.connection_open_timeout; + let max_read_ahead_factor = self.config.noise_read_ahead_frame_count; + let max_write_buffer_size = self.config.noise_write_buffer_size; + let substream_open_timeout = self.config.substream_open_timeout; + let max_parallel_dials = self.config.max_parallel_dials; + let dial_addresses = self.dial_addresses.clone(); + let nodelay = self.config.nodelay; + let resolver = self.resolver.clone(); + + let futures = futures::stream::iter(addresses.into_iter().map(move |address| { + let yamux_config = yamux_config.clone(); + let keypair = keypair.clone(); + let dial_addresses = dial_addresses.clone(); + let resolver = resolver.clone(); + + async move { + let (address, stream) = WebSocketTransport::dial_peer( + address.clone(), + dial_addresses, + connection_open_timeout, + nodelay, + resolver, + ) + .await + .map_err(|error| (address, error))?; + + let open_address = address.clone(); + let (ws_address, peer) = Self::multiaddr_into_url(address.clone()) + .map_err(|error| (address.clone(), error.into()))?; + + WebSocketConnection::open_connection( + connection_id, + keypair, + stream, + address, + peer, + ws_address, + yamux_config, + max_read_ahead_factor, + max_write_buffer_size, + substream_open_timeout, + ) + .await + .map_err(|error| (open_address, error.into())) + } + })) + .buffer_unordered(max_parallel_dials); + + // Future that will resolve to the first successful connection. + // + // The overall deadline caps the total time spent dialing across all addresses, + // preventing unbounded dialing when many addresses are provided. + let future = async move { + let mut errors = Vec::with_capacity(num_addresses); + // Deadline for the overall dial attempt, including all retries. This is to prevent + // retry attempts from indefinitely delaying the dial result. + let dial_deadline = DIAL_DEADLINE_MULTIPLIER * connection_open_timeout; + let deadline = tokio::time::sleep(dial_deadline); + + tokio::pin!(deadline); + tokio::pin!(futures); + + loop { + tokio::select! { + result = futures.next() => { + match result { + Some(Ok(negotiated)) => { + return RawConnectionResult::Connected { + negotiated, + errors, + }; + } + Some(Err(error)) => { + tracing::debug!( + target: LOG_TARGET, + ?connection_id, + ?error, + "failed to open connection", + ); + errors.push(error); + } + None => { + return RawConnectionResult::Failed { + connection_id, + errors, + }; + } + } + } + _ = &mut deadline => { + tracing::debug!( + target: LOG_TARGET, + ?connection_id, + ?dial_deadline, + "overall dial timeout exceeded", + ); + return RawConnectionResult::Failed { + connection_id, + errors, + }; + } + } + } + }; + + let (fut, handle) = futures::future::abortable(future); + let fut = fut.unwrap_or_else(move |_| RawConnectionResult::Canceled { connection_id }); + self.pending_raw_connections.push(Box::pin(fut)); + self.cancel_futures.insert(connection_id, handle); + + Ok(()) + } + + fn negotiate(&mut self, connection_id: ConnectionId) -> crate::Result<()> { + let negotiated = self + .opened + .remove(&connection_id) + .ok_or(Error::ConnectionDoesntExist(connection_id))?; + + self.pending_connections.push(Box::pin(async move { Ok(negotiated) })); + + Ok(()) + } + + fn cancel(&mut self, connection_id: ConnectionId) { + // Cancel the future if it exists. + // State clean-up happens inside the `poll_next`. + if let Some(handle) = self.cancel_futures.get(&connection_id) { + handle.abort(); + } + } +} + +impl Stream for WebSocketTransport { + type Item = TransportEvent; + + fn poll_next(mut self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll> { + if let Poll::Ready(event) = self.listener.poll_next_unpin(cx) { + return match event { + None => { + tracing::error!( + target: LOG_TARGET, + "Websocket listener terminated, ignore if the node is stopping", + ); + + Poll::Ready(None) + } + Some(Err(error)) => { + tracing::error!( + target: LOG_TARGET, + ?error, + "Websocket listener terminated with error", + ); + + Poll::Ready(None) + } + Some(Ok((connection, address))) => { + let connection_id = self.context.next_connection_id(); + tracing::trace!( + target: LOG_TARGET, + ?connection_id, + ?address, + "pending inbound Websocket connection", + ); + + self.pending_inbound_connections.insert( + connection_id, + PendingInboundConnection { + connection, + address, + }, + ); + + Poll::Ready(Some(TransportEvent::PendingInboundConnection { + connection_id, + })) + } + }; + } + + while let Poll::Ready(Some(result)) = self.pending_raw_connections.poll_next_unpin(cx) { + tracing::trace!(target: LOG_TARGET, ?result, "raw connection result"); + + match result { + RawConnectionResult::Connected { negotiated, errors } => { + let Some(handle) = self.cancel_futures.remove(&negotiated.connection_id()) + else { + tracing::warn!( + target: LOG_TARGET, + connection_id = ?negotiated.connection_id(), + address = ?negotiated.endpoint().address(), + ?errors, + "raw connection without a cancel handle", + ); + continue; + }; + + if !handle.is_aborted() { + let connection_id = negotiated.connection_id(); + let address = negotiated.endpoint().address().clone(); + + self.opened.insert(connection_id, negotiated); + + return Poll::Ready(Some(TransportEvent::ConnectionOpened { + connection_id, + address, + errors, + })); + } + } + + RawConnectionResult::Failed { + connection_id, + errors, + } => { + let Some(handle) = self.cancel_futures.remove(&connection_id) else { + tracing::warn!( + target: LOG_TARGET, + ?connection_id, + ?errors, + "raw connection without a cancel handle", + ); + continue; + }; + + if !handle.is_aborted() { + return Poll::Ready(Some(TransportEvent::OpenFailure { + connection_id, + errors, + })); + } + } + RawConnectionResult::Canceled { connection_id } => { + if self.cancel_futures.remove(&connection_id).is_none() { + tracing::warn!( + target: LOG_TARGET, + ?connection_id, + "raw cancelled connection without a cancel handle", + ); + } + } + } + } + + while let Poll::Ready(Some(connection)) = self.pending_connections.poll_next_unpin(cx) { + match connection { + Ok(connection) => { + let peer = connection.peer(); + let endpoint = connection.endpoint(); + self.pending_dials.remove(&connection.connection_id()); + self.pending_open.insert(connection.connection_id(), connection); + + return Poll::Ready(Some(TransportEvent::ConnectionEstablished { + peer, + endpoint, + })); + } + Err((connection_id, error)) => { + if let Some(address) = self.pending_dials.remove(&connection_id) { + return Poll::Ready(Some(TransportEvent::DialFailure { + connection_id, + address, + error, + })); + } else { + tracing::debug!(target: LOG_TARGET, ?error, ?connection_id, "Pending inbound connection failed"); + } + } + } + } + + Poll::Pending + } +} diff --git a/client/litep2p/src/transport/websocket/stream.rs b/client/litep2p/src/transport/websocket/stream.rs new file mode 100644 index 00000000..05846c9d --- /dev/null +++ b/client/litep2p/src/transport/websocket/stream.rs @@ -0,0 +1,226 @@ +// Copyright 2023 litep2p developers +// +// Permission is hereby granted, free of charge, to any person obtaining a +// copy of this software and associated documentation files (the "Software"), +// to deal in the Software without restriction, including without limitation +// the rights to use, copy, modify, merge, publish, distribute, sublicense, +// and/or sell copies of the Software, and to permit persons to whom the +// Software is furnished to do so, subject to the following conditions: +// +// The above copyright notice and this permission notice shall be included in +// all copies or substantial portions of the Software. +// +// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS +// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE +// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER +// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING +// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER +// DEALINGS IN THE SOFTWARE. + +//! Stream implementation for `tokio_tungstenite::WebSocketStream` that implements +//! `AsyncRead + AsyncWrite` + +use bytes::{Buf, Bytes}; +use futures::{SinkExt, StreamExt}; +use tokio::io::{AsyncRead, AsyncWrite}; +use tokio_tungstenite::{tungstenite::Message, WebSocketStream}; + +use std::{ + pin::Pin, + task::{Context, Poll}, +}; + +const LOG_TARGET: &str = "litep2p::transport::websocket::stream"; + +/// Buffered stream which implements `AsyncRead + AsyncWrite` +#[derive(Debug)] +pub(super) struct BufferedStream { + /// Read buffer. + /// + /// The buffer is taken directly from the WebSocket stream. + read_buffer: Bytes, + + /// Underlying WebSocket stream. + stream: WebSocketStream, +} + +impl BufferedStream { + /// Create new [`BufferedStream`]. + pub(super) fn new(stream: WebSocketStream) -> Self { + Self { + read_buffer: Bytes::new(), + stream, + } + } +} + +impl futures::AsyncWrite for BufferedStream { + fn poll_write( + mut self: Pin<&mut Self>, + cx: &mut Context<'_>, + buf: &[u8], + ) -> Poll> { + match futures::ready!(self.stream.poll_ready_unpin(cx)) { + Ok(()) => { + let message = Message::Binary(Bytes::copy_from_slice(buf)); + + if let Err(err) = self.stream.start_send_unpin(message) { + tracing::debug!(target: LOG_TARGET, "Error during start send: {:?}", err); + return Poll::Ready(Err(std::io::ErrorKind::UnexpectedEof.into())); + } + + Poll::Ready(Ok(buf.len())) + } + Err(err) => { + tracing::debug!(target: LOG_TARGET, "Error during poll ready: {:?}", err); + Poll::Ready(Err(std::io::ErrorKind::UnexpectedEof.into())) + } + } + } + + fn poll_flush(mut self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll> { + self.stream.poll_flush_unpin(cx).map_err(|err| { + tracing::debug!(target: LOG_TARGET, "Error during poll flush: {:?}", err); + std::io::ErrorKind::UnexpectedEof.into() + }) + } + + fn poll_close(mut self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll> { + self.stream.poll_close_unpin(cx).map_err(|err| { + tracing::debug!(target: LOG_TARGET, "Error during poll close: {:?}", err); + std::io::ErrorKind::PermissionDenied.into() + }) + } +} + +impl futures::AsyncRead for BufferedStream { + fn poll_read( + mut self: Pin<&mut Self>, + cx: &mut Context<'_>, + buf: &mut [u8], + ) -> Poll> { + loop { + if self.read_buffer.is_empty() { + let next_chunk = match self.stream.poll_next_unpin(cx) { + Poll::Ready(Some(Ok(chunk))) => match chunk { + Message::Binary(chunk) => chunk, + _event => return Poll::Ready(Err(std::io::ErrorKind::Unsupported.into())), + }, + Poll::Ready(Some(Err(_error))) => + return Poll::Ready(Err(std::io::ErrorKind::UnexpectedEof.into())), + Poll::Ready(None) => return Poll::Ready(Ok(0)), + Poll::Pending => return Poll::Pending, + }; + + self.read_buffer = next_chunk; + continue; + } + + let len = std::cmp::min(self.read_buffer.len(), buf.len()); + buf[..len].copy_from_slice(&self.read_buffer[..len]); + self.read_buffer.advance(len); + return Poll::Ready(Ok(len)); + } + } +} + +#[cfg(test)] +mod tests { + use super::*; + use futures::{AsyncRead, AsyncReadExt, AsyncWriteExt}; + use tokio::io::DuplexStream; + use tokio_tungstenite::{tungstenite::protocol::Role, WebSocketStream}; + + async fn create_test_stream() -> (BufferedStream, BufferedStream) { + let (client, server) = tokio::io::duplex(1024); + + ( + BufferedStream::new(WebSocketStream::from_raw_socket(client, Role::Client, None).await), + BufferedStream::new(WebSocketStream::from_raw_socket(server, Role::Server, None).await), + ) + } + + #[tokio::test] + async fn test_write_to_buffer() { + let (mut stream, mut _server) = create_test_stream().await; + let data = b"hello"; + + let bytes_written = stream.write(data).await.unwrap(); + assert_eq!(bytes_written, data.len()); + } + + #[tokio::test] + async fn test_flush_empty_buffer() { + let (mut stream, mut _server) = create_test_stream().await; + assert!(stream.flush().await.is_ok()); + } + + #[tokio::test] + async fn test_write_and_flush() { + let (mut stream, mut _server) = create_test_stream().await; + let data = b"hello world"; + + stream.write_all(data).await.unwrap(); + assert!(stream.flush().await.is_ok()); + } + + #[tokio::test] + async fn test_close_stream() { + let (mut stream, mut _server) = create_test_stream().await; + assert!(stream.close().await.is_ok()); + } + + #[tokio::test] + async fn test_ping_pong_stream() { + let (mut stream, mut server) = create_test_stream().await; + stream.write(b"hello").await.unwrap(); + assert!(stream.flush().await.is_ok()); + + let mut message = [0u8; 5]; + server.read(&mut message).await.unwrap(); + assert_eq!(&message, b"hello"); + + server.write(b"world").await.unwrap(); + assert!(server.flush().await.is_ok()); + + stream.read(&mut message).await.unwrap(); + assert_eq!(&message, b"world"); + + assert!(stream.close().await.is_ok()); + drop(stream); + + assert!(server.write(b"world").await.is_ok()); + match server.flush().await { + Err(error) => if error.kind() == std::io::ErrorKind::UnexpectedEof {}, + state => panic!("Unexpected state {state:?}"), + }; + } + + #[tokio::test] + async fn test_read_poll_pending() { + let (mut stream, mut _server) = create_test_stream().await; + + let mut buffer = [0u8; 10]; + let mut cx = std::task::Context::from_waker(futures::task::noop_waker_ref()); + let pin_stream = Pin::new(&mut stream); + + assert!(matches!( + pin_stream.poll_read(&mut cx, &mut buffer), + Poll::Pending + )); + } + + #[tokio::test] + async fn test_read_from_internal_buffers() { + let (mut stream, server) = create_test_stream().await; + drop(server); + + stream.read_buffer = Bytes::from_static(b"hello world"); + + let mut buffer = [0u8; 32]; + let bytes_read = stream.read(&mut buffer).await.unwrap(); + assert_eq!(bytes_read, 11); + assert_eq!(&buffer[..bytes_read], b"hello world"); + } +} diff --git a/client/litep2p/src/transport/websocket/substream.rs b/client/litep2p/src/transport/websocket/substream.rs new file mode 100644 index 00000000..4f7e59e8 --- /dev/null +++ b/client/litep2p/src/transport/websocket/substream.rs @@ -0,0 +1,103 @@ +// Copyright 2023 litep2p developers +// +// Permission is hereby granted, free of charge, to any person obtaining a +// copy of this software and associated documentation files (the "Software"), +// to deal in the Software without restriction, including without limitation +// the rights to use, copy, modify, merge, publish, distribute, sublicense, +// and/or sell copies of the Software, and to permit persons to whom the +// Software is furnished to do so, subject to the following conditions: +// +// The above copyright notice and this permission notice shall be included in +// all copies or substantial portions of the Software. +// +// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS +// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE +// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER +// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING +// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER +// DEALINGS IN THE SOFTWARE. + +use crate::{protocol::Permit, BandwidthSink}; + +use tokio::io::{AsyncRead, AsyncWrite}; +use tokio_util::compat::Compat; + +use std::{ + io, + pin::Pin, + task::{Context, Poll}, +}; + +/// Substream that holds the inner substream provided by the transport. +#[derive(Debug)] +pub struct Substream { + /// Underlying socket. + io: Compat, + + /// Bandwidth sink. + bandwidth_sink: BandwidthSink, + + /// Connection permit if this substream keeps connection alive. + _lifetime_permit: Option, +} + +impl Substream { + /// Create new [`Substream`]. + pub fn new( + io: Compat, + bandwidth_sink: BandwidthSink, + _lifetime_permit: Option, + ) -> Self { + Self { + io, + bandwidth_sink, + _lifetime_permit, + } + } +} + +impl AsyncRead for Substream { + fn poll_read( + mut self: Pin<&mut Self>, + cx: &mut Context<'_>, + buf: &mut tokio::io::ReadBuf<'_>, + ) -> Poll> { + let len = buf.filled().len(); + match futures::ready!(Pin::new(&mut self.io).poll_read(cx, buf)) { + Err(error) => Poll::Ready(Err(error)), + Ok(res) => { + let inbound_size = buf.filled().len().saturating_sub(len); + self.bandwidth_sink.increase_inbound(inbound_size); + Poll::Ready(Ok(res)) + } + } + } +} + +impl AsyncWrite for Substream { + fn poll_write( + mut self: Pin<&mut Self>, + cx: &mut Context<'_>, + buf: &[u8], + ) -> Poll> { + match futures::ready!(Pin::new(&mut self.io).poll_write(cx, buf)) { + Err(error) => Poll::Ready(Err(error)), + Ok(nwritten) => { + self.bandwidth_sink.increase_outbound(nwritten); + Poll::Ready(Ok(nwritten)) + } + } + } + + fn poll_flush(mut self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll> { + Pin::new(&mut self.io).poll_flush(cx) + } + + fn poll_shutdown( + mut self: Pin<&mut Self>, + cx: &mut Context<'_>, + ) -> Poll> { + Pin::new(&mut self.io).poll_shutdown(cx) + } +} diff --git a/client/litep2p/src/types.rs b/client/litep2p/src/types.rs new file mode 100644 index 00000000..ad980690 --- /dev/null +++ b/client/litep2p/src/types.rs @@ -0,0 +1,98 @@ +// Copyright 2023 litep2p developers +// +// Permission is hereby granted, free of charge, to any person obtaining a +// copy of this software and associated documentation files (the "Software"), +// to deal in the Software without restriction, including without limitation +// the rights to use, copy, modify, merge, publish, distribute, sublicense, +// and/or sell copies of the Software, and to permit persons to whom the +// Software is furnished to do so, subject to the following conditions: +// +// The above copyright notice and this permission notice shall be included in +// all copies or substantial portions of the Software. +// +// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS +// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE +// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER +// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING +// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER +// DEALINGS IN THE SOFTWARE. + +//! Types used by [`Litep2p`](`crate::Litep2p`) protocols/transport. + +use rand::Rng; + +// Re-export the types used in public interfaces. +pub mod multiaddr { + pub use multiaddr::{Error, Iter, Multiaddr, Onion3Addr, Protocol}; +} +pub mod multihash { + pub use multihash::{Code, Error, Multihash, MultihashDigest}; +} +pub mod cid { + pub use cid::{multihash::Multihash, Cid, CidGeneric, Error, Result, Version}; +} + +pub mod protocol; + +/// Substream ID. +#[derive(Debug, Copy, Clone, Hash, PartialEq, Eq)] +pub struct SubstreamId(usize); + +impl Default for SubstreamId { + fn default() -> Self { + Self::new() + } +} + +impl SubstreamId { + /// Create new [`SubstreamId`]. + pub fn new() -> Self { + SubstreamId(0usize) + } + + /// Get [`SubstreamId`] from a number that can be converted into a `usize`. + pub fn from>(value: T) -> Self { + SubstreamId(value.into()) + } +} + +/// Request ID. +#[derive(Debug, Copy, Clone, Hash, PartialEq, Eq)] +#[cfg_attr(feature = "fuzz", derive(serde::Serialize, serde::Deserialize))] +pub struct RequestId(usize); + +impl RequestId { + /// Get [`RequestId`] from a number that can be converted into a `usize`. + pub fn from>(value: T) -> Self { + RequestId(value.into()) + } +} + +/// Connection ID. +#[derive(Debug, Copy, Clone, Hash, PartialEq, Eq)] +pub struct ConnectionId(usize); + +impl ConnectionId { + /// Create new [`ConnectionId`]. + pub fn new() -> Self { + ConnectionId(0usize) + } + + /// Generate random `ConnectionId`. + pub fn random() -> Self { + ConnectionId(rand::thread_rng().gen::()) + } +} + +impl Default for ConnectionId { + fn default() -> Self { + Self::new() + } +} + +impl From for ConnectionId { + fn from(value: usize) -> Self { + ConnectionId(value) + } +} diff --git a/client/litep2p/src/types/protocol.rs b/client/litep2p/src/types/protocol.rs new file mode 100644 index 00000000..eb64238b --- /dev/null +++ b/client/litep2p/src/types/protocol.rs @@ -0,0 +1,110 @@ +// Copyright 2023 litep2p developers +// +// Permission is hereby granted, free of charge, to any person obtaining a +// copy of this software and associated documentation files (the "Software"), +// to deal in the Software without restriction, including without limitation +// the rights to use, copy, modify, merge, publish, distribute, sublicense, +// and/or sell copies of the Software, and to permit persons to whom the +// Software is furnished to do so, subject to the following conditions: +// +// The above copyright notice and this permission notice shall be included in +// all copies or substantial portions of the Software. +// +// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS +// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE +// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER +// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING +// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER +// DEALINGS IN THE SOFTWARE. + +//! Protocol name. + +use std::{ + fmt::Display, + hash::{Hash, Hasher}, + sync::Arc, +}; + +/// Protocol name. +#[derive(Debug, Clone)] +#[cfg_attr(feature = "fuzz", derive(serde::Serialize, serde::Deserialize))] +pub enum ProtocolName { + #[cfg(not(feature = "fuzz"))] + Static(&'static str), + Allocated(Arc), +} + +#[cfg(not(feature = "fuzz"))] +impl From<&'static str> for ProtocolName { + fn from(protocol: &'static str) -> Self { + ProtocolName::Static(protocol) + } +} +#[cfg(feature = "fuzz")] +impl From<&'static str> for ProtocolName { + fn from(protocol: &'static str) -> Self { + ProtocolName::Allocated(Arc::from(protocol.to_string())) + } +} + +impl Display for ProtocolName { + fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result { + match self { + #[cfg(not(feature = "fuzz"))] + Self::Static(protocol) => protocol.fmt(f), + Self::Allocated(protocol) => protocol.fmt(f), + } + } +} + +impl From for ProtocolName { + fn from(protocol: String) -> Self { + ProtocolName::Allocated(Arc::from(protocol)) + } +} + +impl From> for ProtocolName { + fn from(protocol: Arc) -> Self { + Self::Allocated(protocol) + } +} + +impl std::ops::Deref for ProtocolName { + type Target = str; + + fn deref(&self) -> &Self::Target { + match self { + #[cfg(not(feature = "fuzz"))] + Self::Static(protocol) => protocol, + Self::Allocated(protocol) => protocol, + } + } +} + +impl Hash for ProtocolName { + fn hash(&self, state: &mut H) { + (self as &str).hash(state) + } +} + +impl PartialEq for ProtocolName { + fn eq(&self, other: &Self) -> bool { + (self as &str) == (other as &str) + } +} + +impl Eq for ProtocolName {} + +#[cfg(test)] +mod tests { + use super::*; + + #[test] + fn make_protocol() { + let protocol1 = ProtocolName::from(Arc::from(String::from("/protocol/1"))); + let protocol2 = ProtocolName::from("/protocol/1"); + + assert_eq!(protocol1, protocol2); + } +} diff --git a/client/litep2p/src/utils/futures_stream.rs b/client/litep2p/src/utils/futures_stream.rs new file mode 100644 index 00000000..7f134794 --- /dev/null +++ b/client/litep2p/src/utils/futures_stream.rs @@ -0,0 +1,86 @@ +// Copyright 2024 litep2p developers +// +// Permission is hereby granted, free of charge, to any person obtaining a +// copy of this software and associated documentation files (the "Software"), +// to deal in the Software without restriction, including without limitation +// the rights to use, copy, modify, merge, publish, distribute, sublicense, +// and/or sell copies of the Software, and to permit persons to whom the +// Software is furnished to do so, subject to the following conditions: +// +// The above copyright notice and this permission notice shall be included in +// all copies or substantial portions of the Software. +// +// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS +// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE +// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER +// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING +// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER +// DEALINGS IN THE SOFTWARE. + +use futures::{stream::FuturesUnordered, Stream, StreamExt}; + +use std::{ + future::Future, + pin::Pin, + task::{Context, Poll, Waker}, +}; + +/// Wrapper around [`FuturesUnordered`] that wakes a task up automatically. +/// The [`Stream`] implemented by [`FuturesStream`] never terminates and can be +/// polled when contains no futures. +#[derive(Default)] +pub struct FuturesStream { + futures: FuturesUnordered, + waker: Option, +} + +impl FuturesStream { + /// Create new [`FuturesStream`]. + pub fn new() -> Self { + Self { + futures: FuturesUnordered::new(), + waker: None, + } + } + + /// Number of futures in the stream. + pub fn len(&self) -> usize { + self.futures.len() + } + + /// Check if the stream is empty. + pub fn is_empty(&self) -> bool { + self.futures.is_empty() + } + + /// Push a future for processing. + pub fn push(&mut self, future: F) { + self.futures.push(future); + + if let Some(waker) = self.waker.take() { + waker.wake(); + } + } +} + +impl Stream for FuturesStream { + type Item = ::Output; + + fn poll_next(mut self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll> { + let Poll::Ready(Some(result)) = self.futures.poll_next_unpin(cx) else { + // We must save the current waker to wake up the task when new futures are inserted. + // + // Otherwise, simply returning `Poll::Pending` here would cause the task to never be + // woken up again. + // + // We were previously relying on some other task from the `loop tokio::select!` to + // finish. + self.waker = Some(cx.waker().clone()); + + return Poll::Pending; + }; + + Poll::Ready(Some(result)) + } +} diff --git a/client/litep2p/src/utils/mod.rs b/client/litep2p/src/utils/mod.rs new file mode 100644 index 00000000..7c0f49e3 --- /dev/null +++ b/client/litep2p/src/utils/mod.rs @@ -0,0 +1,21 @@ +// Copyright 2024 litep2p developers +// +// Permission is hereby granted, free of charge, to any person obtaining a +// copy of this software and associated documentation files (the "Software"), +// to deal in the Software without restriction, including without limitation +// the rights to use, copy, modify, merge, publish, distribute, sublicense, +// and/or sell copies of the Software, and to permit persons to whom the +// Software is furnished to do so, subject to the following conditions: +// +// The above copyright notice and this permission notice shall be included in +// all copies or substantial portions of the Software. +// +// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS +// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE +// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER +// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING +// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER +// DEALINGS IN THE SOFTWARE. + +pub mod futures_stream; diff --git a/client/litep2p/src/yamux/control.rs b/client/litep2p/src/yamux/control.rs new file mode 100644 index 00000000..2eda5ca1 --- /dev/null +++ b/client/litep2p/src/yamux/control.rs @@ -0,0 +1,264 @@ +// Copyright (c) 2018-2019 Parity Technologies (UK) Ltd. +// +// Licensed under the Apache License, Version 2.0 or MIT license, at your option. +// +// A copy of the Apache License, Version 2.0 is included in the software as +// LICENSE-APACHE and a copy of the MIT license is included in the software +// as LICENSE-MIT. You may also obtain a copy of the Apache License, Version 2.0 +// at https://www.apache.org/licenses/LICENSE-2.0 and a copy of the MIT license +// at https://opensource.org/licenses/MIT. + +use crate::yamux::{Connection, ConnectionError, Result, Stream, MAX_ACK_BACKLOG}; + +use futures::{ + channel::{mpsc, oneshot}, + prelude::*, +}; +use std::{ + pin::Pin, + task::{Context, Poll}, +}; + +const LOG_TARGET: &str = "litep2p::yamux::control"; + +/// A Yamux [`Connection`] controller. +/// +/// This presents an alternative API for using a yamux [`Connection`]. +/// +/// A [`Control`] communicates with a [`ControlledConnection`] via a channel. This allows +/// a [`Control`] to be cloned and shared between tasks and threads. +#[derive(Clone, Debug)] +pub struct Control { + /// Command channel to [`ControlledConnection`]. + sender: mpsc::Sender, +} + +impl Control { + pub fn new(connection: Connection) -> (Self, ControlledConnection) { + let (sender, receiver) = mpsc::channel(MAX_ACK_BACKLOG); + + let control = Control { sender }; + let connection = ControlledConnection { + state: State::Idle(connection), + commands: receiver, + }; + + (control, connection) + } + + /// Open a new stream to the remote. + pub async fn open_stream(&mut self) -> Result { + let (tx, rx) = oneshot::channel(); + self.sender.send(ControlCommand::OpenStream(tx)).await?; + rx.await? + } + + /// Close the connection. + pub async fn close(&mut self) -> Result<()> { + let (tx, rx) = oneshot::channel(); + if self.sender.send(ControlCommand::CloseConnection(tx)).await.is_err() { + // The receiver is closed which means the connection is already closed. + return Ok(()); + } + // A dropped `oneshot::Sender` means the `Connection` is gone, + // so we do not treat receive errors differently here. + let _ = rx.await; + Ok(()) + } +} + +/// Wraps a [`Connection`] which can be controlled with a [`Control`]. +pub struct ControlledConnection { + state: State, + commands: mpsc::Receiver, +} + +impl ControlledConnection +where + T: AsyncRead + AsyncWrite + Unpin + Send + 'static, +{ + fn poll_next(&mut self, cx: &mut Context<'_>) -> Poll>> { + loop { + match std::mem::replace(&mut self.state, State::Poisoned) { + State::Idle(mut connection) => { + match connection.poll_next_inbound(cx) { + Poll::Ready(maybe_stream) => { + // Transport layers will close the connection on the first + // substream error. The `connection.poll_next_inbound` should + // not be called again after returning an error. Instead, we + // must close the connection gracefully. + match maybe_stream.as_ref() { + Some(Err(error)) => { + tracing::debug!(target: LOG_TARGET, ?error, "Inbound stream error, closing connection"); + + self.state = State::Closing { + reply: None, + inner: Closing::DrainingControlCommands { connection }, + }; + } + other => { + tracing::debug!(target: LOG_TARGET, ?other, "Inbound stream reset state to idle"); + self.state = State::Idle(connection) + } + } + + return Poll::Ready(maybe_stream); + } + Poll::Pending => {} + } + + match self.commands.poll_next_unpin(cx) { + Poll::Ready(Some(ControlCommand::OpenStream(reply))) => { + self.state = State::OpeningNewStream { reply, connection }; + continue; + } + Poll::Ready(Some(ControlCommand::CloseConnection(reply))) => { + self.commands.close(); + + self.state = State::Closing { + reply: Some(reply), + inner: Closing::DrainingControlCommands { connection }, + }; + continue; + } + Poll::Ready(None) => { + // Last `Control` sender was dropped, close te connection. + self.state = State::Closing { + reply: None, + inner: Closing::ClosingConnection { connection }, + }; + continue; + } + Poll::Pending => {} + } + + self.state = State::Idle(connection); + return Poll::Pending; + } + State::OpeningNewStream { + reply, + mut connection, + } => match connection.poll_new_outbound(cx) { + Poll::Ready(stream) => { + let _ = reply.send(stream); + + self.state = State::Idle(connection); + continue; + } + Poll::Pending => { + self.state = State::OpeningNewStream { reply, connection }; + return Poll::Pending; + } + }, + State::Closing { + reply, + inner: Closing::DrainingControlCommands { connection }, + } => match self.commands.poll_next_unpin(cx) { + Poll::Ready(Some(ControlCommand::OpenStream(new_reply))) => { + let _ = new_reply.send(Err(ConnectionError::Closed)); + + self.state = State::Closing { + reply, + inner: Closing::DrainingControlCommands { connection }, + }; + continue; + } + Poll::Ready(Some(ControlCommand::CloseConnection(new_reply))) => { + let _ = new_reply.send(()); + + self.state = State::Closing { + reply, + inner: Closing::DrainingControlCommands { connection }, + }; + continue; + } + Poll::Ready(None) => { + self.state = State::Closing { + reply, + inner: Closing::ClosingConnection { connection }, + }; + continue; + } + Poll::Pending => { + self.state = State::Closing { + reply, + inner: Closing::DrainingControlCommands { connection }, + }; + return Poll::Pending; + } + }, + State::Closing { + reply, + inner: Closing::ClosingConnection { mut connection }, + } => match connection.poll_close(cx) { + Poll::Ready(Ok(())) | Poll::Ready(Err(ConnectionError::Closed)) => { + if let Some(reply) = reply { + let _ = reply.send(()); + } + return Poll::Ready(None); + } + Poll::Ready(Err(other)) => { + if let Some(reply) = reply { + let _ = reply.send(()); + } + return Poll::Ready(Some(Err(other))); + } + Poll::Pending => { + self.state = State::Closing { + reply, + inner: Closing::ClosingConnection { connection }, + }; + return Poll::Pending; + } + }, + State::Poisoned => return Poll::Pending, + } + } + } +} + +#[derive(Debug)] +enum ControlCommand { + /// Open a new stream to the remote end. + OpenStream(oneshot::Sender>), + /// Close the whole connection. + CloseConnection(oneshot::Sender<()>), +} + +/// The state of a [`ControlledConnection`]. +enum State { + Idle(Connection), + OpeningNewStream { + reply: oneshot::Sender>, + connection: Connection, + }, + Closing { + /// A channel to the [`Control`] in case the close was requested. `None` if we are closing + /// because the last [`Control`] was dropped. + reply: Option>, + inner: Closing, + }, + Poisoned, +} + +/// A sub-state of our larger state machine for a [`ControlledConnection`]. +/// +/// Closing connection involves two steps: +/// +/// 1. Draining and answered all remaining [`Closing::DrainingControlCommands`]. +/// 1. Closing the underlying [`Connection`]. +enum Closing { + DrainingControlCommands { connection: Connection }, + ClosingConnection { connection: Connection }, +} + +impl futures::Stream for ControlledConnection +where + T: AsyncRead + AsyncWrite + Unpin + Send + 'static, +{ + type Item = Result; + + fn poll_next(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll> { + self.get_mut().poll_next(cx) + } +} diff --git a/client/litep2p/src/yamux/mod.rs b/client/litep2p/src/yamux/mod.rs new file mode 100644 index 00000000..f2635193 --- /dev/null +++ b/client/litep2p/src/yamux/mod.rs @@ -0,0 +1,42 @@ +// Copyright (c) 2018-2019 Parity Technologies (UK) Ltd. +// +// Licensed under the Apache License, Version 2.0 or MIT license, at your option. +// +// A copy of the Apache License, Version 2.0 is included in the software as +// LICENSE-APACHE and a copy of the MIT license is included in the software +// as LICENSE-MIT. You may also obtain a copy of the Apache License, Version 2.0 +// at https://www.apache.org/licenses/LICENSE-2.0 and a copy of the MIT license +// at https://opensource.org/licenses/MIT. + +//! This crate implements the [Yamux specification][1]. +//! +//! It multiplexes independent I/O streams over reliable, ordered connections, +//! such as TCP/IP. +//! +//! The three primary objects, clients of this crate interact with, are: +//! +//! - [`Connection`], which wraps the underlying I/O resource, e.g. a socket, +//! - [`Stream`], which implements [`futures::io::AsyncRead`] and [`futures::io::AsyncWrite`], and +//! - [`Control`], to asynchronously control the [`Connection`]. +//! +//! [1]: https://github.com/hashicorp/yamux/blob/master/spec.md + +#![forbid(unsafe_code)] + +mod control; + +pub use yamux::{ + Config, Connection, ConnectionError, FrameDecodeError, HeaderDecodeError, Mode, Packet, Result, + Stream, StreamId, +}; + +// Switching to the "poll" based yamux API is a massive breaking change for litep2p. +// Instead, we rely on the upstream yamux and keep the old controller API. +pub use crate::yamux::control::{Control, ControlledConnection}; + +pub const DEFAULT_CREDIT: u32 = 256 * 1024; // as per yamux specification + +/// The maximum number of streams we will open without an acknowledgement from the other peer. +/// +/// This enables a very basic form of backpressure on the creation of streams. +const MAX_ACK_BACKLOG: usize = 256; From f3619506b7afd8f6bbd93701a939c88b987ebd11 Mon Sep 17 00:00:00 2001 From: illuzen Date: Thu, 28 May 2026 16:01:33 +0900 Subject: [PATCH 02/26] add dilithium to litep2p --- Cargo.lock | 1 + client/litep2p/Cargo.toml | 3 + client/litep2p/src/crypto/dilithium.rs | 336 +++++++++++++++++++++++++ client/litep2p/src/crypto/mod.rs | 30 ++- client/litep2p/src/schema/keys.proto | 2 + 5 files changed, 368 insertions(+), 4 deletions(-) create mode 100644 client/litep2p/src/crypto/dilithium.rs diff --git a/Cargo.lock b/Cargo.lock index b48cbdbc..956bf335 100644 --- a/Cargo.lock +++ b/Cargo.lock @@ -8325,6 +8325,7 @@ dependencies = [ "pin-project", "prost 0.13.5", "prost-build 0.14.3", + "qp-rusty-crystals-dilithium", "quickcheck", "quinn 0.9.4", "rand 0.8.5", diff --git a/client/litep2p/Cargo.toml b/client/litep2p/Cargo.toml index e0bfc13b..2b3bd785 100644 --- a/client/litep2p/Cargo.toml +++ b/client/litep2p/Cargo.toml @@ -50,6 +50,9 @@ zeroize = "1.8.1" yamux = "0.13.9" enum-display = "0.1.4" +# Post-quantum cryptography +qp-rusty-crystals-dilithium = { version = "2.4.0" } + # Websocket tokio-tungstenite = { version = "0.27.0", features = ["rustls-tls-native-roots", "url"], optional = true } diff --git a/client/litep2p/src/crypto/dilithium.rs b/client/litep2p/src/crypto/dilithium.rs new file mode 100644 index 00000000..d6a83d11 --- /dev/null +++ b/client/litep2p/src/crypto/dilithium.rs @@ -0,0 +1,336 @@ +// Copyright 2024 Quantus Network Developers +// +// Permission is hereby granted, free of charge, to any person obtaining a +// copy of this software and associated documentation files (the "Software"), +// to deal in the Software without restriction, including without limitation +// the rights to use, copy, modify, merge, publish, distribute, sublicense, +// and/or sell copies of the Software, and to permit persons to whom the +// Software is furnished to do so, subject to the following conditions: +// +// The above copyright notice and this permission notice shall be included in +// all copies or substantial portions of the Software. +// +// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS +// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE +// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER +// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING +// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER +// DEALINGS IN THE SOFTWARE. + +//! Dilithium ML-DSA-87 keys for post-quantum cryptography. + +use crate::{ + error::{Error, ParseError}, + PeerId, +}; + +use qp_rusty_crystals_dilithium::{ml_dsa_87, SensitiveBytes32}; +use std::fmt; +use zeroize::Zeroize; + +/// Size of the Dilithium public key in bytes. +pub const PUBLIC_KEY_BYTES: usize = ml_dsa_87::PUBLICKEYBYTES; + +/// Size of the Dilithium signature in bytes. +pub const SIGNATURE_BYTES: usize = ml_dsa_87::SIGNBYTES; + +/// Size of the seed used to generate a keypair (32 bytes). +pub const SEED_BYTES: usize = 32; + +/// A Dilithium ML-DSA-87 keypair. +/// +/// Internally stores the 32-byte seed and the public key. +/// The full secret key is derived on-demand when signing. +#[derive(Clone)] +pub struct Keypair { + /// The seed used to generate the keypair (32 bytes). + seed: [u8; SEED_BYTES], + /// The public key. + public: ml_dsa_87::PublicKey, +} + +impl Keypair { + /// Generate a new random Dilithium keypair. + pub fn generate() -> Keypair { + Keypair::from(SecretKey::generate()) + } + + /// Convert the keypair into a byte array. + /// + /// Returns the 32-byte seed concatenated with the public key bytes. + /// Format: [seed (32 bytes)][public key (2592 bytes)] + pub fn to_bytes(&self) -> Vec { + let mut bytes = Vec::with_capacity(SEED_BYTES + PUBLIC_KEY_BYTES); + bytes.extend_from_slice(&self.seed); + bytes.extend_from_slice(&self.public.to_bytes()); + bytes + } + + /// Try to parse a keypair from bytes, zeroing the input on success. + /// + /// Accepts either: + /// - 32 bytes (seed only) - public key will be regenerated + /// - 32 + 2592 bytes (seed + public key) + pub fn try_from_bytes(kp: &mut [u8]) -> Result { + if kp.len() == SEED_BYTES { + // Seed only - regenerate the keypair + let mut seed = [0u8; SEED_BYTES]; + seed.copy_from_slice(kp); + kp.zeroize(); + + let sensitive_seed = SensitiveBytes32::from(&mut seed.clone()); + let internal_kp = ml_dsa_87::Keypair::generate(sensitive_seed); + + Ok(Keypair { + seed, + public: internal_kp.public, + }) + } else if kp.len() == SEED_BYTES + PUBLIC_KEY_BYTES { + // Full keypair + let mut seed = [0u8; SEED_BYTES]; + seed.copy_from_slice(&kp[..SEED_BYTES]); + + let public = ml_dsa_87::PublicKey::from_bytes(&kp[SEED_BYTES..]) + .map_err(|e| Error::Other(format!("Failed to parse Dilithium public key: {e:?}")))?; + + kp.zeroize(); + + Ok(Keypair { seed, public }) + } else { + Err(Error::Other(format!( + "Invalid Dilithium keypair length: expected {} or {} bytes, got {}", + SEED_BYTES, + SEED_BYTES + PUBLIC_KEY_BYTES, + kp.len() + ))) + } + } + + /// Sign a message using the private key of this keypair. + pub fn sign(&self, msg: &[u8]) -> Vec { + // Regenerate the full keypair from seed for signing + let mut seed_copy = self.seed; + let sensitive_seed = SensitiveBytes32::from(&mut seed_copy); + let internal_kp = ml_dsa_87::Keypair::generate(sensitive_seed); + + // Sign without context, with hedged randomness for side-channel protection + let mut hedge = [0u8; 32]; + rand::RngCore::fill_bytes(&mut rand::rngs::OsRng, &mut hedge); + + internal_kp + .sign(msg, None, Some(hedge)) + .expect("Signing should not fail") + .to_vec() + } + + /// Get the public key of this keypair. + pub fn public(&self) -> PublicKey { + PublicKey(self.public.clone()) + } + + /// Get the secret key (seed) of this keypair. + pub fn secret(&self) -> SecretKey { + SecretKey(self.seed) + } +} + +impl fmt::Debug for Keypair { + fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { + f.debug_struct("Keypair") + .field("public", &self.public) + .finish_non_exhaustive() + } +} + +/// Demote a Dilithium keypair to a secret key (seed). +impl From for SecretKey { + fn from(kp: Keypair) -> SecretKey { + SecretKey(kp.seed) + } +} + +/// Promote a Dilithium secret key (seed) into a keypair. +impl From for Keypair { + fn from(sk: SecretKey) -> Keypair { + let mut seed_copy = sk.0; + let sensitive_seed = SensitiveBytes32::from(&mut seed_copy); + let internal_kp = ml_dsa_87::Keypair::generate(sensitive_seed); + + Keypair { + seed: sk.0, + public: internal_kp.public, + } + } +} + +/// A Dilithium ML-DSA-87 public key. +#[derive(Eq, Clone)] +pub struct PublicKey(ml_dsa_87::PublicKey); + +impl fmt::Debug for PublicKey { + fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { + f.write_str("PublicKey(Dilithium): ")?; + // Only show first 8 bytes for readability + for byte in &self.0.bytes[..8] { + write!(f, "{byte:02x}")?; + } + write!(f, "...")?; + Ok(()) + } +} + +impl PartialEq for PublicKey { + fn eq(&self, other: &Self) -> bool { + self.0.bytes.eq(&other.0.bytes) + } +} + +impl PublicKey { + /// Verify the Dilithium signature on a message using the public key. + pub fn verify(&self, msg: &[u8], sig: &[u8]) -> bool { + self.0.verify(msg, sig, None) + } + + /// Convert the public key to a byte array. + pub fn to_bytes(&self) -> Vec { + self.0.to_bytes().to_vec() + } + + /// Get the public key as a byte slice. + pub fn as_bytes(&self) -> &[u8] { + &self.0.bytes + } + + /// Try to parse a public key from a byte slice. + pub fn try_from_bytes(k: &[u8]) -> Result { + ml_dsa_87::PublicKey::from_bytes(k) + .map(PublicKey) + .map_err(|_| ParseError::InvalidPublicKey) + } + + /// Convert public key to `PeerId`. + pub fn to_peer_id(&self) -> PeerId { + crate::crypto::PublicKey::Dilithium(self.clone()).into() + } +} + +/// A Dilithium secret key (stored as 32-byte seed). +#[derive(Clone)] +pub struct SecretKey([u8; SEED_BYTES]); + +impl Drop for SecretKey { + fn drop(&mut self) { + self.0.zeroize(); + } +} + +/// View the bytes of the secret key (seed). +impl AsRef<[u8]> for SecretKey { + fn as_ref(&self) -> &[u8] { + &self.0[..] + } +} + +impl fmt::Debug for SecretKey { + fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { + write!(f, "SecretKey(Dilithium)") + } +} + +impl SecretKey { + /// Generate a new Dilithium secret key (seed). + pub fn generate() -> SecretKey { + let mut seed = [0u8; SEED_BYTES]; + rand::RngCore::fill_bytes(&mut rand::rngs::OsRng, &mut seed); + SecretKey(seed) + } + + /// Try to parse a Dilithium secret key from a byte slice, + /// zeroing the input on success. + pub fn try_from_bytes(mut sk_bytes: impl AsMut<[u8]>) -> crate::Result { + let sk_bytes = sk_bytes.as_mut(); + let secret = <[u8; SEED_BYTES]>::try_from(&*sk_bytes) + .map_err(|e| Error::Other(format!("Failed to parse Dilithium secret key: {e}")))?; + sk_bytes.zeroize(); + Ok(SecretKey(secret)) + } + + /// Convert this secret key to a byte array. + pub fn to_bytes(&self) -> [u8; SEED_BYTES] { + self.0 + } +} + +#[cfg(test)] +mod tests { + use super::*; + + fn eq_keypairs(kp1: &Keypair, kp2: &Keypair) -> bool { + kp1.public() == kp2.public() && kp1.seed == kp2.seed + } + + #[test] + fn dilithium_keypair_encode_decode() { + let kp1 = Keypair::generate(); + let mut kp1_enc = kp1.to_bytes(); + let kp2 = Keypair::try_from_bytes(&mut kp1_enc).unwrap(); + assert!(eq_keypairs(&kp1, &kp2)); + // Verify the bytes were zeroized + assert!(kp1_enc.iter().all(|b| *b == 0)); + } + + #[test] + fn dilithium_keypair_from_seed_only() { + let kp1 = Keypair::generate(); + let mut seed = kp1.secret().to_bytes(); + let kp2 = Keypair::try_from_bytes(&mut seed[..]).unwrap(); + assert!(eq_keypairs(&kp1, &kp2)); + } + + #[test] + fn dilithium_keypair_from_secret() { + let kp1 = Keypair::generate(); + let sk = kp1.secret(); + let kp2 = Keypair::from(sk); + assert!(eq_keypairs(&kp1, &kp2)); + } + + #[test] + fn dilithium_signature() { + let kp = Keypair::generate(); + let pk = kp.public(); + + let msg = "hello world".as_bytes(); + let sig = kp.sign(msg); + assert!(pk.verify(msg, &sig)); + + // Invalid signature + let mut invalid_sig = sig.clone(); + invalid_sig[3..6].copy_from_slice(&[10, 23, 42]); + assert!(!pk.verify(msg, &invalid_sig)); + + // Wrong message + let invalid_msg = "h3ll0 w0rld".as_bytes(); + assert!(!pk.verify(invalid_msg, &sig)); + } + + #[test] + fn dilithium_public_key_roundtrip() { + let kp = Keypair::generate(); + let pk = kp.public(); + let pk_bytes = pk.to_bytes(); + let pk2 = PublicKey::try_from_bytes(&pk_bytes).unwrap(); + assert_eq!(pk, pk2); + } + + #[test] + fn secret_key_zeroized_on_drop() { + let kp = Keypair::generate(); + let sk = kp.secret(); + let sk_bytes = sk.to_bytes(); + // Verify we got valid bytes + assert!(!sk_bytes.iter().all(|b| *b == 0)); + // Drop happens automatically + } +} diff --git a/client/litep2p/src/crypto/mod.rs b/client/litep2p/src/crypto/mod.rs index f50f77b5..07913e5e 100644 --- a/client/litep2p/src/crypto/mod.rs +++ b/client/litep2p/src/crypto/mod.rs @@ -23,6 +23,7 @@ use crate::{error::ParseError, peer_id::*}; +pub mod dilithium; pub mod ed25519; #[cfg(feature = "rsa")] pub mod rsa; @@ -39,6 +40,8 @@ pub(crate) mod keys_proto { pub enum PublicKey { /// A public Ed25519 key. Ed25519(ed25519::PublicKey), + /// A public Dilithium ML-DSA-87 key (post-quantum). + Dilithium(dilithium::PublicKey), } impl PublicKey { @@ -67,6 +70,10 @@ impl From<&PublicKey> for keys_proto::PublicKey { r#type: keys_proto::KeyType::Ed25519 as i32, data: key.to_bytes().to_vec(), }, + PublicKey::Dilithium(key) => keys_proto::PublicKey { + r#type: keys_proto::KeyType::Dilithium as i32, + data: key.to_bytes(), + }, } } } @@ -78,10 +85,14 @@ impl TryFrom for PublicKey { let key_type = keys_proto::KeyType::try_from(pubkey.r#type) .map_err(|_| ParseError::UnknownKeyType(pubkey.r#type))?; - if key_type == keys_proto::KeyType::Ed25519 { - Ok(ed25519::PublicKey::try_from_bytes(&pubkey.data).map(PublicKey::Ed25519)?) - } else { - Err(ParseError::UnknownKeyType(key_type as i32)) + match key_type { + keys_proto::KeyType::Ed25519 => { + ed25519::PublicKey::try_from_bytes(&pubkey.data).map(PublicKey::Ed25519) + } + keys_proto::KeyType::Dilithium => { + dilithium::PublicKey::try_from_bytes(&pubkey.data).map(PublicKey::Dilithium) + } + _ => Err(ParseError::UnknownKeyType(key_type as i32)), } } } @@ -92,11 +103,19 @@ impl From for PublicKey { } } +impl From for PublicKey { + fn from(public_key: dilithium::PublicKey) -> Self { + PublicKey::Dilithium(public_key) + } +} + /// The public key of a remote node's identity keypair. Supports RSA keys additionally to ed25519. #[derive(Clone, Debug, PartialEq, Eq)] pub enum RemotePublicKey { /// A public Ed25519 key. Ed25519(ed25519::PublicKey), + /// A public Dilithium ML-DSA-87 key (post-quantum). + Dilithium(dilithium::PublicKey), /// A public RSA key. #[cfg(feature = "rsa")] Rsa(rsa::PublicKey), @@ -112,6 +131,7 @@ impl RemotePublicKey { use RemotePublicKey::*; match self { Ed25519(pk) => pk.verify(msg, sig), + Dilithium(pk) => pk.verify(msg, sig), #[cfg(feature = "rsa")] Rsa(pk) => pk.verify(msg, sig), } @@ -138,6 +158,8 @@ impl TryFrom for RemotePublicKey { match key_type { keys_proto::KeyType::Ed25519 => ed25519::PublicKey::try_from_bytes(&pubkey.data).map(RemotePublicKey::Ed25519), + keys_proto::KeyType::Dilithium => + dilithium::PublicKey::try_from_bytes(&pubkey.data).map(RemotePublicKey::Dilithium), #[cfg(feature = "rsa")] keys_proto::KeyType::Rsa => rsa::PublicKey::try_decode_x509(&pubkey.data).map(RemotePublicKey::Rsa), diff --git a/client/litep2p/src/schema/keys.proto b/client/litep2p/src/schema/keys.proto index 5fbeaf8f..3074035a 100644 --- a/client/litep2p/src/schema/keys.proto +++ b/client/litep2p/src/schema/keys.proto @@ -7,6 +7,8 @@ enum KeyType { Ed25519 = 1; Secp256k1 = 2; ECDSA = 3; + // 4 is reserved + Dilithium = 5; // ML-DSA-87 post-quantum signature scheme } message PublicKey { From 04687c88a02813516f1ecb92a59afe8970925454 Mon Sep 17 00:00:00 2001 From: illuzen Date: Thu, 28 May 2026 16:12:26 +0900 Subject: [PATCH 03/26] remove classical identity --- Cargo.lock | 1 - client/litep2p/Cargo.toml | 7 +- client/litep2p/src/config.rs | 2 +- client/litep2p/src/crypto/dilithium.rs | 2 +- client/litep2p/src/crypto/ed25519.rs | 268 ------------------ client/litep2p/src/crypto/mod.rs | 112 +++----- client/litep2p/src/crypto/noise/mod.rs | 4 +- client/litep2p/src/crypto/rsa.rs | 44 --- client/litep2p/src/crypto/tls/certificate.rs | 44 +-- client/litep2p/src/crypto/tls/mod.rs | 2 +- client/litep2p/src/peer_id.rs | 2 +- .../litep2p/src/protocol/libp2p/identify.rs | 4 +- client/litep2p/src/schema/keys.proto | 8 +- .../litep2p/src/transport/manager/handle.rs | 2 +- client/litep2p/src/transport/manager/mod.rs | 4 +- client/litep2p/src/transport/quic/listener.rs | 2 +- client/litep2p/src/transport/quic/mod.rs | 2 +- .../src/transport/s2n-quic/connection.rs | 4 +- client/litep2p/src/transport/s2n-quic/mod.rs | 4 +- .../litep2p/src/transport/tcp/connection.rs | 2 +- client/litep2p/src/transport/tcp/mod.rs | 2 +- .../litep2p/src/transport/webrtc/opening.rs | 2 +- .../src/transport/websocket/connection.rs | 2 +- 23 files changed, 72 insertions(+), 454 deletions(-) delete mode 100644 client/litep2p/src/crypto/ed25519.rs delete mode 100644 client/litep2p/src/crypto/rsa.rs diff --git a/Cargo.lock b/Cargo.lock index 956bf335..29c23e94 100644 --- a/Cargo.lock +++ b/Cargo.lock @@ -8307,7 +8307,6 @@ dependencies = [ "bs58", "bytes 1.11.1", "cid 0.11.1", - "ed25519-dalek", "enum-display", "futures 0.3.31", "futures-timer", diff --git a/client/litep2p/Cargo.toml b/client/litep2p/Cargo.toml index 2b3bd785..f061e486 100644 --- a/client/litep2p/Cargo.toml +++ b/client/litep2p/Cargo.toml @@ -14,7 +14,7 @@ async-trait = "0.1.88" bs58 = "0.5.1" bytes = "1.11.1" cid = "0.11.1" -ed25519-dalek = { version = "2.1.1", features = ["rand_core"] } + futures = "0.3.27" futures-timer = "3.0.3" indexmap = { version = "2.9.0", features = ["std"] } @@ -43,8 +43,9 @@ hickory-resolver = "0.25.2" uint = "0.10.0" unsigned-varint = { version = "0.8.0", features = ["codec"] } url = "2.5.4" -x25519-dalek = "2.0.1" + x509-parser = "0.17.0" +x25519-dalek = "2.0.1" yasna = "0.5.0" zeroize = "1.8.1" yamux = "0.13.9" @@ -80,6 +81,4 @@ hex-literal = "1.0.0" default = ["websocket", "quic"] websocket = ["dep:tokio-tungstenite"] quic = ["dep:webpki", "dep:quinn", "dep:rustls", "dep:ring", "dep:rcgen"] -webrtc = ["dep:str0m"] -rsa = ["dep:ring"] fuzz = ["serde/derive", "serde/rc", "bytes/serde", "dep:serde_millis", "cid/serde", "multihash/serde"] diff --git a/client/litep2p/src/config.rs b/client/litep2p/src/config.rs index e00bd4b2..5a7d4479 100644 --- a/client/litep2p/src/config.rs +++ b/client/litep2p/src/config.rs @@ -21,7 +21,7 @@ //! [`Litep2p`](`crate::Litep2p`) configuration. use crate::{ - crypto::ed25519::Keypair, + crypto::dilithium::Keypair, executor::{DefaultExecutor, Executor}, protocol::{ libp2p::{bitswap, identify, kademlia, ping}, diff --git a/client/litep2p/src/crypto/dilithium.rs b/client/litep2p/src/crypto/dilithium.rs index d6a83d11..cd39448a 100644 --- a/client/litep2p/src/crypto/dilithium.rs +++ b/client/litep2p/src/crypto/dilithium.rs @@ -211,7 +211,7 @@ impl PublicKey { /// Convert public key to `PeerId`. pub fn to_peer_id(&self) -> PeerId { - crate::crypto::PublicKey::Dilithium(self.clone()).into() + crate::crypto::PublicKey::from(self.clone()).into() } } diff --git a/client/litep2p/src/crypto/ed25519.rs b/client/litep2p/src/crypto/ed25519.rs deleted file mode 100644 index 2162f48c..00000000 --- a/client/litep2p/src/crypto/ed25519.rs +++ /dev/null @@ -1,268 +0,0 @@ -// Copyright 2019 Parity Technologies (UK) Ltd. -// Copyright 2023 litep2p developers -// -// Permission is hereby granted, free of charge, to any person obtaining a -// copy of this software and associated documentation files (the "Software"), -// to deal in the Software without restriction, including without limitation -// the rights to use, copy, modify, merge, publish, distribute, sublicense, -// and/or sell copies of the Software, and to permit persons to whom the -// Software is furnished to do so, subject to the following conditions: -// -// The above copyright notice and this permission notice shall be included in -// all copies or substantial portions of the Software. -// -// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS -// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, -// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE -// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER -// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING -// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER -// DEALINGS IN THE SOFTWARE. - -//! Ed25519 keys. - -use crate::{ - error::{Error, ParseError}, - PeerId, -}; - -use ed25519_dalek::{self as ed25519, Signer as _, Verifier as _}; -use std::fmt; -use zeroize::Zeroize; - -/// An Ed25519 keypair. -#[derive(Clone)] -pub struct Keypair(ed25519::SigningKey); - -impl Keypair { - /// Generate a new random Ed25519 keypair. - pub fn generate() -> Keypair { - Keypair::from(SecretKey::generate()) - } - - /// Convert the keypair into a byte array by concatenating the bytes - /// of the secret scalar and the compressed public point, - /// an informal standard for encoding Ed25519 keypairs. - pub fn to_bytes(&self) -> [u8; 64] { - self.0.to_keypair_bytes() - } - - /// Try to parse a keypair from the [binary format](https://datatracker.ietf.org/doc/html/rfc8032#section-5.1.5) - /// produced by [`Keypair::to_bytes`], zeroing the input on success. - /// - /// Note that this binary format is the same as `ed25519_dalek`'s and `ed25519_zebra`'s. - pub fn try_from_bytes(kp: &mut [u8]) -> Result { - let bytes = <[u8; 64]>::try_from(&*kp) - .map_err(|e| Error::Other(format!("Failed to parse ed25519 keypair: {e}")))?; - - ed25519::SigningKey::from_keypair_bytes(&bytes) - .map(|k| { - kp.zeroize(); - Keypair(k) - }) - .map_err(|e| Error::Other(format!("Failed to parse ed25519 keypair: {e}"))) - } - - /// Sign a message using the private key of this keypair. - pub fn sign(&self, msg: &[u8]) -> Vec { - self.0.sign(msg).to_bytes().to_vec() - } - - /// Get the public key of this keypair. - pub fn public(&self) -> PublicKey { - PublicKey(self.0.verifying_key()) - } - - /// Get the secret key of this keypair. - pub fn secret(&self) -> SecretKey { - SecretKey(self.0.to_bytes()) - } -} - -impl fmt::Debug for Keypair { - fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { - f.debug_struct("Keypair").field("public", &self.0.verifying_key()).finish() - } -} - -/// Demote an Ed25519 keypair to a secret key. -impl From for SecretKey { - fn from(kp: Keypair) -> SecretKey { - SecretKey(kp.0.to_bytes()) - } -} - -/// Promote an Ed25519 secret key into a keypair. -impl From for Keypair { - fn from(sk: SecretKey) -> Keypair { - let signing = ed25519::SigningKey::from_bytes(&sk.0); - Keypair(signing) - } -} - -/// An Ed25519 public key. -#[derive(Eq, Clone)] -pub struct PublicKey(ed25519::VerifyingKey); - -impl fmt::Debug for PublicKey { - fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { - f.write_str("PublicKey(compressed): ")?; - for byte in self.0.as_bytes() { - write!(f, "{byte:x}")?; - } - Ok(()) - } -} - -impl PartialEq for PublicKey { - fn eq(&self, other: &Self) -> bool { - self.0.as_bytes().eq(other.0.as_bytes()) - } -} - -impl PublicKey { - /// Verify the Ed25519 signature on a message using the public key. - pub fn verify(&self, msg: &[u8], sig: &[u8]) -> bool { - ed25519::Signature::try_from(sig).and_then(|s| self.0.verify(msg, &s)).is_ok() - } - - /// Convert the public key to a byte array in compressed form, i.e. - /// where one coordinate is represented by a single bit. - pub fn to_bytes(&self) -> [u8; 32] { - self.0.to_bytes() - } - - /// Get the public key as a byte slice. - pub fn as_bytes(&self) -> &[u8] { - self.0.as_bytes() - } - - /// Try to parse a public key from a byte array containing the actual key as produced by - /// `to_bytes`. - pub fn try_from_bytes(k: &[u8]) -> Result { - let k = <[u8; 32]>::try_from(k).map_err(|_| ParseError::InvalidPublicKey)?; - - // The error type of the verifying key is deliberately opaque as to avoid side-channel - // leakage. We can't provide a more specific error type here. - ed25519::VerifyingKey::from_bytes(&k) - .map_err(|_| ParseError::InvalidPublicKey) - .map(PublicKey) - } - - /// Convert public key to `PeerId`. - pub fn to_peer_id(&self) -> PeerId { - crate::crypto::PublicKey::Ed25519(self.clone()).into() - } -} - -/// An Ed25519 secret key. -#[derive(Clone)] -pub struct SecretKey(ed25519::SecretKey); - -/// View the bytes of the secret key. -impl AsRef<[u8]> for SecretKey { - fn as_ref(&self) -> &[u8] { - &self.0[..] - } -} - -impl fmt::Debug for SecretKey { - fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { - write!(f, "SecretKey") - } -} - -impl SecretKey { - /// Generate a new Ed25519 secret key. - pub fn generate() -> SecretKey { - let signing = ed25519::SigningKey::generate(&mut rand::rngs::OsRng); - SecretKey(signing.to_bytes()) - } - /// Try to parse an Ed25519 secret key from a byte slice - /// containing the actual key, zeroing the input on success. - /// If the bytes do not constitute a valid Ed25519 secret key, an error is - /// returned. - pub fn try_from_bytes(mut sk_bytes: impl AsMut<[u8]>) -> crate::Result { - let sk_bytes = sk_bytes.as_mut(); - let secret = <[u8; 32]>::try_from(&*sk_bytes) - .map_err(|e| Error::Other(format!("Failed to parse ed25519 secret key: {e}")))?; - sk_bytes.zeroize(); - Ok(SecretKey(secret)) - } - - /// Convert this secret key to a byte array. - pub fn to_bytes(&self) -> [u8; 32] { - self.0 - } -} - -#[cfg(test)] -mod tests { - use super::*; - use quickcheck::*; - - fn eq_keypairs(kp1: &Keypair, kp2: &Keypair) -> bool { - kp1.public() == kp2.public() && kp1.0.to_bytes() == kp2.0.to_bytes() - } - - #[test] - fn ed25519_keypair_encode_decode() { - fn prop() -> bool { - let kp1 = Keypair::generate(); - let mut kp1_enc = kp1.to_bytes(); - let kp2 = Keypair::try_from_bytes(&mut kp1_enc).unwrap(); - eq_keypairs(&kp1, &kp2) && kp1_enc.iter().all(|b| *b == 0) - } - QuickCheck::new().tests(10).quickcheck(prop as fn() -> _); - } - - #[test] - fn ed25519_keypair_from_secret() { - fn prop() -> bool { - let kp1 = Keypair::generate(); - let mut sk = kp1.0.to_bytes(); - let kp2 = Keypair::from(SecretKey::try_from_bytes(&mut sk).unwrap()); - eq_keypairs(&kp1, &kp2) && sk == [0u8; 32] - } - QuickCheck::new().tests(10).quickcheck(prop as fn() -> _); - } - - #[test] - fn ed25519_signature() { - let kp = Keypair::generate(); - let pk = kp.public(); - - let msg = "hello world".as_bytes(); - let sig = kp.sign(msg); - assert!(pk.verify(msg, &sig)); - - let mut invalid_sig = sig.clone(); - invalid_sig[3..6].copy_from_slice(&[10, 23, 42]); - assert!(!pk.verify(msg, &invalid_sig)); - - let invalid_msg = "h3ll0 w0rld".as_bytes(); - assert!(!pk.verify(invalid_msg, &sig)); - } - - #[test] - fn secret_key() { - let _ = tracing_subscriber::fmt() - .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) - .try_init(); - - let key = Keypair::generate(); - tracing::trace!("keypair: {:?}", key); - tracing::trace!("secret: {:?}", key.secret()); - tracing::trace!("public: {:?}", key.public()); - - let new_key = Keypair::from(key.secret()); - assert_eq!(new_key.secret().as_ref(), key.secret().as_ref()); - assert_eq!(new_key.public(), key.public()); - - let new_secret = SecretKey::from(new_key.clone()); - assert_eq!(new_secret.as_ref(), new_key.secret().as_ref()); - - let cloned_secret = new_secret.clone(); - assert_eq!(cloned_secret.as_ref(), new_secret.as_ref()); - } -} diff --git a/client/litep2p/src/crypto/mod.rs b/client/litep2p/src/crypto/mod.rs index 07913e5e..03f20056 100644 --- a/client/litep2p/src/crypto/mod.rs +++ b/client/litep2p/src/crypto/mod.rs @@ -1,5 +1,6 @@ // Copyright 2023 Protocol Labs. // Copyright 2023 litep2p developers +// Copyright 2024 Quantus Network Developers // // Permission is hereby granted, free of charge, to any person obtaining a // copy of this software and associated documentation files (the "Software"), @@ -20,13 +21,12 @@ // DEALINGS IN THE SOFTWARE. //! Crypto-related code. +//! +//! This module provides post-quantum cryptography using Dilithium ML-DSA-87. use crate::{error::ParseError, peer_id::*}; pub mod dilithium; -pub mod ed25519; -#[cfg(feature = "rsa")] -pub mod rsa; pub(crate) mod noise; #[cfg(feature = "quic")] @@ -35,14 +35,12 @@ pub(crate) mod keys_proto { include!(concat!(env!("OUT_DIR"), "/keys_proto.rs")); } +// Re-export Keypair for convenience +pub use dilithium::Keypair; + /// The public key of a node's identity keypair. #[derive(Clone, Debug, PartialEq, Eq)] -pub enum PublicKey { - /// A public Ed25519 key. - Ed25519(ed25519::PublicKey), - /// A public Dilithium ML-DSA-87 key (post-quantum). - Dilithium(dilithium::PublicKey), -} +pub struct PublicKey(pub(crate) dilithium::PublicKey); impl PublicKey { /// Encode the public key into a protobuf structure for storage or @@ -61,19 +59,29 @@ impl PublicKey { pub fn to_peer_id(&self) -> PeerId { self.into() } + + /// Verify a signature for a message using this public key. + #[must_use] + pub fn verify(&self, msg: &[u8], sig: &[u8]) -> bool { + self.0.verify(msg, sig) + } + + /// Convert the public key to bytes. + pub fn to_bytes(&self) -> Vec { + self.0.to_bytes() + } + + /// Get the public key as a byte slice. + pub fn as_bytes(&self) -> &[u8] { + self.0.as_bytes() + } } impl From<&PublicKey> for keys_proto::PublicKey { fn from(key: &PublicKey) -> Self { - match key { - PublicKey::Ed25519(key) => keys_proto::PublicKey { - r#type: keys_proto::KeyType::Ed25519 as i32, - data: key.to_bytes().to_vec(), - }, - PublicKey::Dilithium(key) => keys_proto::PublicKey { - r#type: keys_proto::KeyType::Dilithium as i32, - data: key.to_bytes(), - }, + keys_proto::PublicKey { + r#type: keys_proto::KeyType::Dilithium as i32, + data: key.0.to_bytes(), } } } @@ -85,58 +93,26 @@ impl TryFrom for PublicKey { let key_type = keys_proto::KeyType::try_from(pubkey.r#type) .map_err(|_| ParseError::UnknownKeyType(pubkey.r#type))?; - match key_type { - keys_proto::KeyType::Ed25519 => { - ed25519::PublicKey::try_from_bytes(&pubkey.data).map(PublicKey::Ed25519) - } - keys_proto::KeyType::Dilithium => { - dilithium::PublicKey::try_from_bytes(&pubkey.data).map(PublicKey::Dilithium) - } - _ => Err(ParseError::UnknownKeyType(key_type as i32)), + if key_type != keys_proto::KeyType::Dilithium { + return Err(ParseError::UnknownKeyType(key_type as i32)); } - } -} -impl From for PublicKey { - fn from(public_key: ed25519::PublicKey) -> Self { - PublicKey::Ed25519(public_key) + dilithium::PublicKey::try_from_bytes(&pubkey.data).map(PublicKey) } } impl From for PublicKey { fn from(public_key: dilithium::PublicKey) -> Self { - PublicKey::Dilithium(public_key) + PublicKey(public_key) } } -/// The public key of a remote node's identity keypair. Supports RSA keys additionally to ed25519. -#[derive(Clone, Debug, PartialEq, Eq)] -pub enum RemotePublicKey { - /// A public Ed25519 key. - Ed25519(ed25519::PublicKey), - /// A public Dilithium ML-DSA-87 key (post-quantum). - Dilithium(dilithium::PublicKey), - /// A public RSA key. - #[cfg(feature = "rsa")] - Rsa(rsa::PublicKey), -} +/// The public key of a remote node's identity keypair. +/// +/// This is used when verifying signatures from remote peers. +pub type RemotePublicKey = PublicKey; impl RemotePublicKey { - /// Verify a signature for a message using this public key, i.e. check - /// that the signature has been produced by the corresponding - /// private key (authenticity), and that the message has not been - /// tampered with (integrity). - #[must_use] - pub fn verify(&self, msg: &[u8], sig: &[u8]) -> bool { - use RemotePublicKey::*; - match self { - Ed25519(pk) => pk.verify(msg, sig), - Dilithium(pk) => pk.verify(msg, sig), - #[cfg(feature = "rsa")] - Rsa(pk) => pk.verify(msg, sig), - } - } - /// Decode a public key from a protobuf structure, e.g. read from storage /// or received from another node. pub fn from_protobuf_encoding(bytes: &[u8]) -> Result { @@ -147,23 +123,3 @@ impl RemotePublicKey { pubkey.try_into() } } - -impl TryFrom for RemotePublicKey { - type Error = ParseError; - - fn try_from(pubkey: keys_proto::PublicKey) -> Result { - let key_type = keys_proto::KeyType::try_from(pubkey.r#type) - .map_err(|_| ParseError::UnknownKeyType(pubkey.r#type))?; - - match key_type { - keys_proto::KeyType::Ed25519 => - ed25519::PublicKey::try_from_bytes(&pubkey.data).map(RemotePublicKey::Ed25519), - keys_proto::KeyType::Dilithium => - dilithium::PublicKey::try_from_bytes(&pubkey.data).map(RemotePublicKey::Dilithium), - #[cfg(feature = "rsa")] - keys_proto::KeyType::Rsa => - rsa::PublicKey::try_decode_x509(&pubkey.data).map(RemotePublicKey::Rsa), - _ => Err(ParseError::UnknownKeyType(key_type as i32)), - } - } -} diff --git a/client/litep2p/src/crypto/noise/mod.rs b/client/litep2p/src/crypto/noise/mod.rs index f5775684..13864e92 100644 --- a/client/litep2p/src/crypto/noise/mod.rs +++ b/client/litep2p/src/crypto/noise/mod.rs @@ -23,7 +23,7 @@ use crate::{ config::Role, - crypto::{ed25519::Keypair, PublicKey, RemotePublicKey}, + crypto::{dilithium::Keypair, PublicKey, RemotePublicKey}, error::{NegotiationError, ParseError}, PeerId, }; @@ -106,7 +106,7 @@ impl NoiseContext { role: Role, ) -> Result { let noise_payload = handshake_schema::NoiseHandshakePayload { - identity_key: Some(PublicKey::Ed25519(id_keys.public()).to_protobuf_encoding()), + identity_key: Some(PublicKey::from(id_keys.public()).to_protobuf_encoding()), identity_sig: Some( id_keys.sign(&[STATIC_KEY_DOMAIN.as_bytes(), keypair.public.as_ref()].concat()), ), diff --git a/client/litep2p/src/crypto/rsa.rs b/client/litep2p/src/crypto/rsa.rs deleted file mode 100644 index 96108181..00000000 --- a/client/litep2p/src/crypto/rsa.rs +++ /dev/null @@ -1,44 +0,0 @@ -// Copyright 2025 litep2p developers -// -// Permission is hereby granted, free of charge, to any person obtaining a -// copy of this software and associated documentation files (the "Software"), -// to deal in the Software without restriction, including without limitation -// the rights to use, copy, modify, merge, publish, distribute, sublicense, -// and/or sell copies of the Software, and to permit persons to whom the -// Software is furnished to do so, subject to the following conditions: -// -// The above copyright notice and this permission notice shall be included in -// all copies or substantial portions of the Software. -// -// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS -// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, -// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE -// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER -// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING -// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER -// DEALINGS IN THE SOFTWARE. - -//! RSA public key. - -use crate::error::ParseError; -use ring::signature::{UnparsedPublicKey, RSA_PKCS1_2048_8192_SHA256}; -use x509_parser::{prelude::FromDer, x509::SubjectPublicKeyInfo}; - -/// An RSA public key. -#[derive(Clone, Debug, PartialEq, Eq)] -pub struct PublicKey(Vec); - -impl PublicKey { - /// Decode an RSA public key from a DER-encoded X.509 SubjectPublicKeyInfo structure. - pub fn try_decode_x509(spki: &[u8]) -> Result { - SubjectPublicKeyInfo::from_der(spki) - .map(|(_, spki)| Self(spki.subject_public_key.as_ref().to_vec())) - .map_err(|_| ParseError::InvalidPublicKey) - } - - /// Verify the RSA signature on a message using the public key. - pub fn verify(&self, msg: &[u8], sig: &[u8]) -> bool { - let key = UnparsedPublicKey::new(&RSA_PKCS1_2048_8192_SHA256, &self.0); - key.verify(msg, sig).is_ok() - } -} diff --git a/client/litep2p/src/crypto/tls/certificate.rs b/client/litep2p/src/crypto/tls/certificate.rs index 853534ee..f8336ab2 100644 --- a/client/litep2p/src/crypto/tls/certificate.rs +++ b/client/litep2p/src/crypto/tls/certificate.rs @@ -23,7 +23,7 @@ //! This module handles generation, signing, and verification of certificates. use crate::{ - crypto::{ed25519::Keypair, RemotePublicKey}, + crypto::{dilithium::Keypair, PublicKey, RemotePublicKey}, PeerId, }; @@ -220,7 +220,7 @@ fn make_libp2p_extension( // } let extension_content = { let serialized_pubkey = - crate::crypto::PublicKey::Ed25519(identity_keypair.public()).to_protobuf_encoding(); + PublicKey::from(identity_keypair.public()).to_protobuf_encoding(); yasna::encode_der(&(serialized_pubkey, signature)) }; @@ -444,23 +444,25 @@ impl P2pCertificate<'_> { #[cfg(test)] mod tests { use super::*; - use hex_literal::hex; #[test] fn sanity_check() { - // let keypair = identity::Keypair::generate_ed25519(); - let keypair = crate::crypto::ed25519::Keypair::generate(); + let keypair = crate::crypto::dilithium::Keypair::generate(); let (cert, _) = generate(&keypair).unwrap(); let parsed_cert = parse(&cert).unwrap(); assert!(parsed_cert.verify().is_ok()); assert_eq!( - crate::crypto::RemotePublicKey::Ed25519(keypair.public()), + PublicKey::from(keypair.public()), parsed_cert.extension.public_key ); } + // Note: The certificate signature scheme tests below verify that we can parse + // various TLS certificate formats. The p2p extension signature verification + // will fail because the extension was not signed with the certificate's private key. + // These tests verify the certificate parsing and signature scheme detection. macro_rules! check_cert { ($name:ident, $path:literal, $scheme:path) => { #[test] @@ -477,7 +479,7 @@ mod tests { } check_cert! {ed448, "./test_assets/ed448.der", rustls::SignatureScheme::ED448} - check_cert! {ed25519, "./test_assets/ed25519.der", rustls::SignatureScheme::ED25519} + check_cert! {ed25519_cert, "./test_assets/ed25519.der", rustls::SignatureScheme::ED25519} check_cert! {rsa_pkcs1_sha256, "./test_assets/rsa_pkcs1_sha256.der", rustls::SignatureScheme::RSA_PKCS1_SHA256} check_cert! {rsa_pkcs1_sha384, "./test_assets/rsa_pkcs1_sha384.der", rustls::SignatureScheme::RSA_PKCS1_SHA384} check_cert! {rsa_pkcs1_sha512, "./test_assets/rsa_pkcs1_sha512.der", rustls::SignatureScheme::RSA_PKCS1_SHA512} @@ -506,29 +508,7 @@ mod tests { assert!(cert.signature_scheme().is_err()); } - #[test] - fn can_parse_certificate_with_ed25519_keypair() { - let certificate = rustls::Certificate(hex!("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").to_vec()); - - let peer_id = parse(&certificate).unwrap().peer_id(); - - assert_eq!( - "12D3KooWJRSrypvnpHgc6ZAgyCni4KcSmbV7uGRaMw5LgMKT18fq" - .parse::() - .unwrap(), - peer_id - ); - } - - #[test] - fn fails_to_parse_bad_certificate_with_ed25519_keypair() { - let certificate = rustls::Certificate(hex!("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").to_vec()); - - match parse(&certificate) { - Ok(_) => assert!(false), - Err(error) => { - assert_eq!(format!("{error}"), "UnknownIssuer"); - } - } - } + // Note: The following tests for Ed25519 keypair certificates are removed + // as we no longer support Ed25519 identity keys. Only Dilithium is supported. + // The `sanity_check` test above verifies Dilithium certificates work correctly. } diff --git a/client/litep2p/src/crypto/tls/mod.rs b/client/litep2p/src/crypto/tls/mod.rs index e19976ae..eb247f00 100644 --- a/client/litep2p/src/crypto/tls/mod.rs +++ b/client/litep2p/src/crypto/tls/mod.rs @@ -25,7 +25,7 @@ #![cfg_attr(docsrs, feature(doc_cfg, doc_auto_cfg))] -use crate::{crypto::ed25519::Keypair, PeerId}; +use crate::{crypto::dilithium::Keypair, PeerId}; use std::sync::Arc; diff --git a/client/litep2p/src/peer_id.rs b/client/litep2p/src/peer_id.rs index 1a13ba03..5a4cc1a7 100644 --- a/client/litep2p/src/peer_id.rs +++ b/client/litep2p/src/peer_id.rs @@ -257,7 +257,7 @@ impl FromStr for PeerId { #[cfg(test)] mod tests { - use crate::{crypto::ed25519::Keypair, PeerId}; + use crate::{crypto::dilithium::Keypair, PeerId}; use multiaddr::{Multiaddr, Protocol}; use multihash::Multihash; diff --git a/client/litep2p/src/protocol/libp2p/identify.rs b/client/litep2p/src/protocol/libp2p/identify.rs index 3f19511a..e0ee9a5e 100644 --- a/client/litep2p/src/protocol/libp2p/identify.rs +++ b/client/litep2p/src/protocol/libp2p/identify.rs @@ -467,8 +467,8 @@ mod tests { let (identify_config, identify) = Config::new("1.0.0".to_string(), Some("litep2p/1.0.0".to_string())); - let keypair = crate::crypto::ed25519::Keypair::generate(); - let peer = PeerId::from_public_key(&crate::crypto::PublicKey::Ed25519(keypair.public())); + let keypair = crate::crypto::dilithium::Keypair::generate(); + let peer = PeerId::from_public_key(&crate::crypto::PublicKey::from(keypair.public())); let config = ConfigBuilder::new() .with_keypair(keypair) .with_tcp(TcpConfig { diff --git a/client/litep2p/src/schema/keys.proto b/client/litep2p/src/schema/keys.proto index 3074035a..8a31f19c 100644 --- a/client/litep2p/src/schema/keys.proto +++ b/client/litep2p/src/schema/keys.proto @@ -3,12 +3,8 @@ syntax = "proto2"; package keys_proto; enum KeyType { - RSA = 0; - Ed25519 = 1; - Secp256k1 = 2; - ECDSA = 3; - // 4 is reserved - Dilithium = 5; // ML-DSA-87 post-quantum signature scheme + // Post-quantum only - all classical ECC/RSA removed for security + Dilithium = 0; // ML-DSA-87 post-quantum signature scheme } message PublicKey { diff --git a/client/litep2p/src/transport/manager/handle.rs b/client/litep2p/src/transport/manager/handle.rs index c73e5260..68eda73f 100644 --- a/client/litep2p/src/transport/manager/handle.rs +++ b/client/litep2p/src/transport/manager/handle.rs @@ -20,7 +20,7 @@ use crate::{ addresses::PublicAddresses, - crypto::ed25519::Keypair, + crypto::dilithium::Keypair, error::ImmediateDialError, executor::Executor, protocol::ProtocolSet, diff --git a/client/litep2p/src/transport/manager/mod.rs b/client/litep2p/src/transport/manager/mod.rs index 49d988b2..869786c7 100644 --- a/client/litep2p/src/transport/manager/mod.rs +++ b/client/litep2p/src/transport/manager/mod.rs @@ -21,7 +21,7 @@ use crate::{ addresses::PublicAddresses, codec::ProtocolCodec, - crypto::ed25519::Keypair, + crypto::dilithium::Keypair, error::{AddressError, DialError, Error}, executor::Executor, protocol::{InnerTransportEvent, TransportService}, @@ -1472,7 +1472,7 @@ mod tests { use super::*; use crate::{ - crypto::ed25519::Keypair, + crypto::dilithium::Keypair, executor::DefaultExecutor, transport::{dummy::DummyTransport, KEEP_ALIVE_TIMEOUT}, }; diff --git a/client/litep2p/src/transport/quic/listener.rs b/client/litep2p/src/transport/quic/listener.rs index 77760b62..569b12e2 100644 --- a/client/litep2p/src/transport/quic/listener.rs +++ b/client/litep2p/src/transport/quic/listener.rs @@ -19,7 +19,7 @@ // DEALINGS IN THE SOFTWARE. use crate::{ - crypto::{ed25519::Keypair, tls::make_server_config}, + crypto::{dilithium::Keypair, tls::make_server_config}, error::AddressError, PeerId, }; diff --git a/client/litep2p/src/transport/quic/mod.rs b/client/litep2p/src/transport/quic/mod.rs index 708c8b24..025b7da7 100644 --- a/client/litep2p/src/transport/quic/mod.rs +++ b/client/litep2p/src/transport/quic/mod.rs @@ -604,7 +604,7 @@ mod tests { use super::*; use crate::{ codec::ProtocolCodec, - crypto::ed25519::Keypair, + crypto::dilithium::Keypair, executor::DefaultExecutor, protocol::SubstreamKeepAlive, transport::manager::{ProtocolContext, TransportHandle}, diff --git a/client/litep2p/src/transport/s2n-quic/connection.rs b/client/litep2p/src/transport/s2n-quic/connection.rs index 821e3743..a556ab0c 100644 --- a/client/litep2p/src/transport/s2n-quic/connection.rs +++ b/client/litep2p/src/transport/s2n-quic/connection.rs @@ -379,7 +379,7 @@ mod tests { use super::*; use crate::{ crypto::{ - ed25519::Keypair, + dilithium::Keypair, tls::{certificate::generate, TlsProvider}, PublicKey, }, @@ -405,7 +405,7 @@ mod tests { let keypair = Keypair::generate(); let (certificate, key) = generate(&keypair).unwrap(); let (tx, rx) = channel(1); - let peer = PeerId::from_public_key(&PublicKey::Ed25519(keypair.public())); + let peer = PeerId::from_public_key(&PublicKey::from(keypair.public())); let provider = TlsProvider::new(key, certificate, None, Some(tx.clone())); let server = Server::builder() diff --git a/client/litep2p/src/transport/s2n-quic/mod.rs b/client/litep2p/src/transport/s2n-quic/mod.rs index 6237ee3f..606a3aa7 100644 --- a/client/litep2p/src/transport/s2n-quic/mod.rs +++ b/client/litep2p/src/transport/s2n-quic/mod.rs @@ -365,7 +365,7 @@ mod tests { use super::*; use crate::{ codec::ProtocolCodec, - crypto::{ed25519::Keypair, PublicKey}, + crypto::{dilithium::Keypair, PublicKey}, transport::manager::{ ProtocolContext, SupportedTransport, TransportHandle, TransportManager, TransportManagerCommand, TransportManagerEvent, @@ -407,7 +407,7 @@ mod tests { let transport1 = QuicTransport::new(handle1, transport_config1).await.unwrap(); - let _peer1: PeerId = PeerId::from_public_key(&PublicKey::Ed25519(keypair1.public())); + let _peer1: PeerId = PeerId::from_public_key(&PublicKey::from(keypair1.public())); let listen_address = Transport::listen_address(&transport1).to_string(); let listen_address: Multiaddr = format!("{}/p2p/{}", listen_address, _peer1.to_string()).parse().unwrap(); diff --git a/client/litep2p/src/transport/tcp/connection.rs b/client/litep2p/src/transport/tcp/connection.rs index 7f296952..0634dbbd 100644 --- a/client/litep2p/src/transport/tcp/connection.rs +++ b/client/litep2p/src/transport/tcp/connection.rs @@ -21,7 +21,7 @@ use crate::{ config::Role, crypto::{ - ed25519::Keypair, + dilithium::Keypair, noise::{self, NoiseSocket}, }, error::{Error, NegotiationError, SubstreamError}, diff --git a/client/litep2p/src/transport/tcp/mod.rs b/client/litep2p/src/transport/tcp/mod.rs index 46564186..fe51f25d 100644 --- a/client/litep2p/src/transport/tcp/mod.rs +++ b/client/litep2p/src/transport/tcp/mod.rs @@ -728,7 +728,7 @@ mod tests { use super::*; use crate::{ codec::ProtocolCodec, - crypto::ed25519::Keypair, + crypto::dilithium::Keypair, executor::DefaultExecutor, protocol::SubstreamKeepAlive, transport::manager::{ProtocolContext, SupportedTransport, TransportManagerBuilder}, diff --git a/client/litep2p/src/transport/webrtc/opening.rs b/client/litep2p/src/transport/webrtc/opening.rs index f778ca84..cbc2470f 100644 --- a/client/litep2p/src/transport/webrtc/opening.rs +++ b/client/litep2p/src/transport/webrtc/opening.rs @@ -22,7 +22,7 @@ use crate::{ config::Role, - crypto::{ed25519::Keypair, noise::NoiseContext}, + crypto::{dilithium::Keypair, noise::NoiseContext}, transport::{webrtc::util::WebRtcMessage, Endpoint}, types::ConnectionId, Error, PeerId, diff --git a/client/litep2p/src/transport/websocket/connection.rs b/client/litep2p/src/transport/websocket/connection.rs index 2dc795e7..7420466f 100644 --- a/client/litep2p/src/transport/websocket/connection.rs +++ b/client/litep2p/src/transport/websocket/connection.rs @@ -21,7 +21,7 @@ use crate::{ config::Role, crypto::{ - ed25519::Keypair, + dilithium::Keypair, noise::{self, NoiseSocket}, }, error::{Error, NegotiationError, SubstreamError}, From 42edada7583b471058ac9ad78a248570916927b7 Mon Sep 17 00:00:00 2001 From: illuzen Date: Thu, 28 May 2026 16:30:17 +0900 Subject: [PATCH 04/26] noise uses kyber now --- Cargo.lock | 23 +++++++++- client/litep2p/Cargo.toml | 3 +- client/litep2p/src/crypto/noise/mod.rs | 44 ++++++++++++------- client/litep2p/src/crypto/noise/protocol.rs | 15 ++++++- .../litep2p/src/crypto/noise/x25519_spec.rs | 5 ++- 5 files changed, 69 insertions(+), 21 deletions(-) diff --git a/Cargo.lock b/Cargo.lock index 29c23e94..158155ef 100644 --- a/Cargo.lock +++ b/Cargo.lock @@ -5656,7 +5656,7 @@ dependencies = [ "sha2 0.10.9", "simple-dns", "smallvec", - "snow", + "snow 0.9.6", "socket2 0.5.10", "thiserror 2.0.18", "tokio 1.47.1", @@ -8337,7 +8337,7 @@ dependencies = [ "sha2 0.10.9", "simple-dns", "smallvec", - "snow", + "snow 0.10.0", "socket2 0.5.10", "str0m", "thiserror 2.0.18", @@ -11425,6 +11425,25 @@ dependencies = [ "subtle 2.6.1", ] +[[package]] +name = "snow" +version = "0.10.0" +source = "registry+https://github.com/rust-lang/crates.io-index" +checksum = "599b506ccc4aff8cf7844bc42cf783009a434c1e26c964432560fb6d6ad02d82" +dependencies = [ + "aes-gcm", + "blake2 0.10.6", + "chacha20poly1305", + "curve25519-dalek", + "getrandom 0.3.3", + "pqcrypto-kyber", + "pqcrypto-traits", + "ring 0.17.14", + "rustc_version", + "sha2 0.10.9", + "subtle 2.6.1", +] + [[package]] name = "socket2" version = "0.4.10" diff --git a/client/litep2p/Cargo.toml b/client/litep2p/Cargo.toml index f061e486..fd44ad06 100644 --- a/client/litep2p/Cargo.toml +++ b/client/litep2p/Cargo.toml @@ -32,7 +32,8 @@ serde = "1.0.158" sha2 = "0.10.9" simple-dns = "0.11.0" smallvec = "1.15.0" -snow = { version = "0.9.3", features = ["ring-resolver"], default-features = false } +# Noise protocol with post-quantum HFS (Hybrid Forward Secrecy) +snow = { version = "0.10.0", features = ["default-resolver", "ring-resolver", "hfs", "use-pqcrypto-kyber1024"] } socket2 = { version = "0.5.9", features = ["all"] } thiserror = "2.0.12" tokio-stream = "0.1.17" diff --git a/client/litep2p/src/crypto/noise/mod.rs b/client/litep2p/src/crypto/noise/mod.rs index 13864e92..ef581c01 100644 --- a/client/litep2p/src/crypto/noise/mod.rs +++ b/client/litep2p/src/crypto/noise/mod.rs @@ -46,8 +46,9 @@ mod handshake_schema { include!(concat!(env!("OUT_DIR"), "/noise.rs")); } -/// Noise parameters. -const NOISE_PARAMETERS: &str = "Noise_XX_25519_ChaChaPoly_SHA256"; +/// Noise parameters with post-quantum Hybrid Forward Secrecy (HFS). +/// Uses XX pattern with X25519 + Kyber1024 for quantum-resistant key exchange. +const NOISE_PARAMETERS: &str = "Noise_XXhfs_25519+Kyber1024_ChaChaPoly_SHA256"; /// Prefix of static key signatures for domain separation. pub(crate) const STATIC_KEY_DOMAIN: &str = "noise-libp2p-static-key:"; @@ -136,8 +137,8 @@ impl NoiseContext { let static_key = &dh_keypair.private; let noise = match role { - Role::Dialer => builder.local_private_key(static_key).build_initiator()?, - Role::Listener => builder.local_private_key(static_key).build_responder()?, + Role::Dialer => builder.local_private_key(static_key)?.build_initiator()?, + Role::Listener => builder.local_private_key(static_key)?.build_responder()?, }; Self::assemble(noise, dh_keypair, keypair, role) @@ -154,7 +155,7 @@ impl NoiseContext { let keypair = noise.generate_keypair()?; let noise = noise - .local_private_key(&keypair.private) + .local_private_key(&keypair.private)? .prologue(&prologue) .build_initiator()?; @@ -208,7 +209,11 @@ impl NoiseContext { return Err(NegotiationError::StateMismatch); }; - let mut buffer = vec![0u8; 256]; + // HFS with Kyber1024 requires larger buffers: + // - X25519 public key: 32 bytes + // - Kyber1024 public key: 1568 bytes + // - Plus Noise overhead + let mut buffer = vec![0u8; 4096]; let nwritten = noise.write_message(&[], &mut buffer)?; buffer.truncate(nwritten); @@ -226,7 +231,7 @@ impl NoiseContext { /// /// Only the dialer sends the second message. pub fn second_message(&mut self) -> Result, NegotiationError> { - tracing::trace!(target: LOG_TARGET, "get noise paylod message"); + tracing::trace!(target: LOG_TARGET, role = ?self.role, "get noise payload message"); let NoiseState::Handshake(ref mut noise) = self.noise else { tracing::error!(target: LOG_TARGET, "invalid state to read the first handshake message"); @@ -234,7 +239,15 @@ impl NoiseContext { return Err(NegotiationError::StateMismatch); }; - let mut buffer = vec![0u8; 2048]; + // HFS with Kyber1024 + Dilithium identity requires larger buffers: + // - e (X25519): 32 bytes + // - e1 (Kyber1024 pubkey): 1568 bytes + // - ekem1 (Kyber1024 ciphertext): 1568 bytes + // - s (encrypted X25519): 48 bytes + // - payload (Dilithium pubkey + signature): ~7230 bytes + // - encryption overhead: 16 bytes + // Total: ~10500 bytes, use 16384 for safety + let mut buffer = vec![0u8; 16384]; let nwritten = noise.write_message(&self.payload, &mut buffer)?; buffer.truncate(nwritten); @@ -258,8 +271,9 @@ impl NoiseContext { io.read_exact(&mut message).await?; // TODO: https://github.com/paritytech/litep2p/issues/332 use correct overhead. + // HFS with Kyber1024 requires larger buffers let mut out = BytesMut::new(); - out.resize(message.len() + 200, 0u8); + out.resize(message.len() + 4096, 0u8); let NoiseState::Handshake(ref mut noise) = self.noise else { tracing::error!(target: LOG_TARGET, "invalid state to read handshake message"); @@ -850,12 +864,12 @@ pub async fn handshake( let mut noise = NoiseContext::new(keypair, role)?; let payload = match role { Role::Dialer => { - // write initial message + // write initial message (-> e, e1) let first_message = noise.first_message(Role::Dialer)?; io.write_all(&first_message).await?; io.flush().await?; - // read back response which contains the remote peer id + // read back response which contains the remote peer id (<- e, ee, ekem1, s, es) let message = noise.read_handshake_message(&mut io).await?; // Decode the remote identity message. let payload = handshake_schema::NoiseHandshakePayload::decode(message) @@ -865,7 +879,7 @@ pub async fn handshake( err })?; - // send the final message which contains local peer id + // send the final message which contains local peer id (-> s, se) let second_message = noise.second_message()?; io.write_all(&second_message).await?; io.flush().await?; @@ -873,15 +887,15 @@ pub async fn handshake( payload } Role::Listener => { - // read remote's first message + // read remote's first message (-> e, e1) let _ = noise.read_handshake_message(&mut io).await?; - // send local peer id. + // send local peer id (<- e, ee, ekem1, s, es) let second_message = noise.second_message()?; io.write_all(&second_message).await?; io.flush().await?; - // read remote's second message which contains their peer id + // read remote's second message which contains their peer id (-> s, se) let message = noise.read_handshake_message(&mut io).await?; // Decode the remote identity message. handshake_schema::NoiseHandshakePayload::decode(message) diff --git a/client/litep2p/src/crypto/noise/protocol.rs b/client/litep2p/src/crypto/noise/protocol.rs index 59e95ecc..ad2495c0 100644 --- a/client/litep2p/src/crypto/noise/protocol.rs +++ b/client/litep2p/src/crypto/noise/protocol.rs @@ -96,6 +96,14 @@ impl snow::resolvers::CryptoResolver for Resolver { ) -> Option> { snow::resolvers::RingResolver.resolve_cipher(choice) } + + fn resolve_kem( + &self, + choice: &snow::params::KemChoice, + ) -> Option> { + // Delegate Kyber1024 to the default resolver + snow::resolvers::DefaultResolver.resolve_kem(choice) + } } /// Wrapper around a CSPRNG to implement `snow::Random` trait for. @@ -121,4 +129,9 @@ impl rand::RngCore for Rng { impl rand::CryptoRng for Rng {} -impl snow::types::Random for Rng {} +impl snow::types::Random for Rng { + fn try_fill_bytes(&mut self, dest: &mut [u8]) -> Result<(), snow::Error> { + rand::RngCore::try_fill_bytes(self, dest) + .map_err(|_| snow::Error::Rng) + } +} diff --git a/client/litep2p/src/crypto/noise/x25519_spec.rs b/client/litep2p/src/crypto/noise/x25519_spec.rs index 2c87864d..85d29907 100644 --- a/client/litep2p/src/crypto/noise/x25519_spec.rs +++ b/client/litep2p/src/crypto/noise/x25519_spec.rs @@ -99,12 +99,13 @@ impl snow::types::Dh for Keypair { secret.zeroize(); } - fn generate(&mut self, rng: &mut dyn snow::types::Random) { + fn generate(&mut self, rng: &mut dyn snow::types::Random) -> Result<(), snow::Error> { let mut secret = [0u8; 32]; - rng.fill_bytes(&mut secret); + rng.try_fill_bytes(&mut secret)?; self.secret = SecretKey(X25519Spec(secret)); self.public = PublicKey(X25519Spec(x25519(secret, X25519_BASEPOINT_BYTES))); secret.zeroize(); + Ok(()) } fn dh(&self, pk: &[u8], shared_secret: &mut [u8]) -> Result<(), snow::Error> { From d9c4835cef2dc17caadbf7984d0654c1e3749652 Mon Sep 17 00:00:00 2001 From: illuzen Date: Thu, 28 May 2026 17:05:04 +0900 Subject: [PATCH 05/26] post-quantum QUIC --- Cargo.lock | 143 +++--------------- Cargo.toml | 15 ++ client/litep2p/Cargo.toml | 71 ++++----- client/litep2p/src/crypto/tls/certificate.rs | 116 ++++++-------- client/litep2p/src/crypto/tls/mod.rs | 31 ++-- client/litep2p/src/crypto/tls/verifier.rs | 80 +++++----- client/litep2p/src/transport/quic/listener.rs | 60 +++++--- client/litep2p/src/transport/quic/mod.rs | 18 ++- .../litep2p/src/transport/quic/substream.rs | 6 +- 9 files changed, 226 insertions(+), 314 deletions(-) diff --git a/Cargo.lock b/Cargo.lock index 158155ef..d3d28778 100644 --- a/Cargo.lock +++ b/Cargo.lock @@ -3605,7 +3605,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index" checksum = "a8f2f12607f92c69b12ed746fabf9ca4f5c482cba46679c1a75b874ed7c26adb" dependencies = [ "futures-io", - "rustls 0.23.32", + "rustls", "rustls-pki-types", ] @@ -4277,7 +4277,7 @@ dependencies = [ "hyper 1.7.0", "hyper-util", "log", - "rustls 0.23.32", + "rustls", "rustls-native-certs", "rustls-pki-types", "tokio 1.47.1", @@ -4843,7 +4843,7 @@ dependencies = [ "http 1.3.1", "jsonrpsee-core", "pin-project", - "rustls 0.23.32", + "rustls", "rustls-pki-types", "rustls-platform-verifier 0.5.3", "soketto", @@ -5331,10 +5331,10 @@ dependencies = [ "libp2p-identity", "libp2p-tls", "parking_lot 0.12.4", - "quinn 0.11.9", + "quinn", "rand 0.8.5", "ring 0.17.14", - "rustls 0.23.32", + "rustls", "socket2 0.5.10", "thiserror 1.0.69", "tokio 1.47.1", @@ -5426,7 +5426,7 @@ dependencies = [ "libp2p-identity", "rcgen 0.11.3", "ring 0.17.14", - "rustls 0.23.32", + "rustls", "rustls-webpki 0.101.7", "thiserror 1.0.69", "x509-parser 0.16.0", @@ -8326,11 +8326,13 @@ dependencies = [ "prost-build 0.14.3", "qp-rusty-crystals-dilithium", "quickcheck", - "quinn 0.9.4", + "quinn", "rand 0.8.5", "rcgen 0.14.8", "ring 0.17.14", - "rustls 0.20.9", + "rustls", + "rustls-pki-types", + "rustls-post-quantum", "serde", "serde_json", "serde_millis", @@ -8718,10 +8720,10 @@ dependencies = [ "qpow-math", "quantus-miner-api", "quantus-runtime", - "quinn 0.11.9", + "quinn", "rand 0.8.5", "rcgen 0.14.8", - "rustls 0.23.32", + "rustls", "rustls-pki-types", "rustls-post-quantum", "sc-basic-authorship", @@ -8861,24 +8863,6 @@ dependencies = [ "rand 0.10.0", ] -[[package]] -name = "quinn" -version = "0.9.4" -source = "registry+https://github.com/rust-lang/crates.io-index" -checksum = "2e8b432585672228923edbbf64b8b12c14e1112f62e88737655b4a083dbcd78e" -dependencies = [ - "bytes 1.11.1", - "pin-project-lite 0.2.16", - "quinn-proto 0.9.6", - "quinn-udp 0.3.2", - "rustc-hash 1.1.0", - "rustls 0.20.9", - "thiserror 1.0.69", - "tokio 1.47.1", - "tracing", - "webpki", -] - [[package]] name = "quinn" version = "0.11.9" @@ -8889,10 +8873,10 @@ dependencies = [ "cfg_aliases 0.2.1", "futures-io", "pin-project-lite 0.2.16", - "quinn-proto 0.11.13", - "quinn-udp 0.5.14", + "quinn-proto", + "quinn-udp", "rustc-hash 2.1.1", - "rustls 0.23.32", + "rustls", "socket2 0.6.0", "thiserror 2.0.18", "tokio 1.47.1", @@ -8900,30 +8884,13 @@ dependencies = [ "web-time", ] -[[package]] -name = "quinn-proto" -version = "0.9.6" -source = "registry+https://github.com/rust-lang/crates.io-index" -checksum = "94b0b33c13a79f669c85defaf4c275dc86a0c0372807d0ca3d78e0bb87274863" -dependencies = [ - "bytes 1.11.1", - "rand 0.8.5", - "ring 0.16.20", - "rustc-hash 1.1.0", - "rustls 0.20.9", - "slab", - "thiserror 1.0.69", - "tinyvec", - "tracing", - "webpki", -] - [[package]] name = "quinn-proto" version = "0.11.13" source = "registry+https://github.com/rust-lang/crates.io-index" checksum = "f1906b49b0c3bc04b5fe5d86a77925ae6524a19b816ae38ce1e426255f1d8a31" dependencies = [ + "aws-lc-rs", "bytes 1.11.1", "fastbloom", "getrandom 0.3.3", @@ -8931,7 +8898,7 @@ dependencies = [ "rand 0.9.2", "ring 0.17.14", "rustc-hash 2.1.1", - "rustls 0.23.32", + "rustls", "rustls-pki-types", "rustls-platform-verifier 0.6.2", "slab", @@ -8941,19 +8908,6 @@ dependencies = [ "web-time", ] -[[package]] -name = "quinn-udp" -version = "0.3.2" -source = "registry+https://github.com/rust-lang/crates.io-index" -checksum = "641538578b21f5e5c8ea733b736895576d0fe329bb883b937db6f4d163dbaaf4" -dependencies = [ - "libc", - "quinn-proto 0.9.6", - "socket2 0.4.10", - "tracing", - "windows-sys 0.42.0", -] - [[package]] name = "quinn-udp" version = "0.5.14" @@ -9152,8 +9106,6 @@ source = "registry+https://github.com/rust-lang/crates.io-index" checksum = "57f6d249aad744e274e682777a50283a225a32705394ee6d5fcc01efa25e4055" dependencies = [ "aws-lc-rs", - "pem", - "ring 0.17.14", "rustls-pki-types", "time", "x509-parser 0.18.1", @@ -9438,17 +9390,6 @@ dependencies = [ "windows-sys 0.61.0", ] -[[package]] -name = "rustls" -version = "0.20.9" -source = "registry+https://github.com/rust-lang/crates.io-index" -checksum = "1b80e3dec595989ea8510028f30c408a4630db12c9cbb8de34203b89d6577e99" -dependencies = [ - "ring 0.16.20", - "sct", - "webpki", -] - [[package]] name = "rustls" version = "0.23.32" @@ -9498,7 +9439,7 @@ dependencies = [ "jni", "log", "once_cell", - "rustls 0.23.32", + "rustls", "rustls-native-certs", "rustls-platform-verifier-android", "rustls-webpki 0.103.6", @@ -9519,7 +9460,7 @@ dependencies = [ "jni", "log", "once_cell", - "rustls 0.23.32", + "rustls", "rustls-native-certs", "rustls-platform-verifier-android", "rustls-webpki 0.103.6", @@ -9542,7 +9483,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index" checksum = "0da3cd9229bac4fae1f589c8f875b3c891a058ddaa26eb3bde16b5e43dc174ce" dependencies = [ "aws-lc-rs", - "rustls 0.23.32", + "rustls", "rustls-webpki 0.103.6", ] @@ -10294,7 +10235,7 @@ dependencies = [ "parity-scale-codec", "parking_lot 0.12.4", "rand 0.8.5", - "rustls 0.23.32", + "rustls", "sc-client-api", "sc-network", "sc-network-types", @@ -10879,16 +10820,6 @@ dependencies = [ "sha2 0.10.9", ] -[[package]] -name = "sct" -version = "0.7.1" -source = "registry+https://github.com/rust-lang/crates.io-index" -checksum = "da046153aa2352493d6cb7da4b6e5c0c057d8a1d0a9aa8560baffdd945acd414" -dependencies = [ - "ring 0.17.14", - "untrusted 0.9.0", -] - [[package]] name = "sctp-proto" version = "0.5.0" @@ -11444,16 +11375,6 @@ dependencies = [ "subtle 2.6.1", ] -[[package]] -name = "socket2" -version = "0.4.10" -source = "registry+https://github.com/rust-lang/crates.io-index" -checksum = "9f7916fc008ca5542385b89a3d3ce689953c143e9304a9bf8beec1de48994c0d" -dependencies = [ - "libc", - "winapi", -] - [[package]] name = "socket2" version = "0.5.10" @@ -13106,7 +13027,7 @@ version = "0.26.3" source = "registry+https://github.com/rust-lang/crates.io-index" checksum = "05f63835928ca123f1bef57abbcd23bb2ba0ac9ae1235f1e65bda0d06e7786bd" dependencies = [ - "rustls 0.23.32", + "rustls", "tokio 1.47.1", ] @@ -13130,7 +13051,7 @@ checksum = "489a59b6730eda1b0171fcfda8b121f4bee2b35cba8645ca35c5f7ba3eb736c1" dependencies = [ "futures-util", "log", - "rustls 0.23.32", + "rustls", "rustls-native-certs", "rustls-pki-types", "tokio 1.47.1", @@ -13431,7 +13352,7 @@ dependencies = [ "httparse", "log", "rand 0.9.2", - "rustls 0.23.32", + "rustls", "rustls-pki-types", "sha1", "thiserror 2.0.18", @@ -14582,21 +14503,6 @@ dependencies = [ "windows-link 0.2.0", ] -[[package]] -name = "windows-sys" -version = "0.42.0" -source = "registry+https://github.com/rust-lang/crates.io-index" -checksum = "5a3e1820f08b8513f676f7ab6c1f99ff312fb97b553d30ff4dd86f9f15728aa7" -dependencies = [ - "windows_aarch64_gnullvm 0.42.2", - "windows_aarch64_msvc 0.42.2", - "windows_i686_gnu 0.42.2", - "windows_i686_msvc 0.42.2", - "windows_x86_64_gnu 0.42.2", - "windows_x86_64_gnullvm 0.42.2", - "windows_x86_64_msvc 0.42.2", -] - [[package]] name = "windows-sys" version = "0.45.0" @@ -15090,7 +14996,6 @@ dependencies = [ "lazy_static", "nom 7.1.3", "oid-registry 0.8.1", - "ring 0.17.14", "rusticata-macros", "thiserror 2.0.18", "time", diff --git a/Cargo.toml b/Cargo.toml index 6ccff455..794c93ca 100644 --- a/Cargo.toml +++ b/Cargo.toml @@ -113,6 +113,7 @@ serde_json = { version = "1.0.132", default-features = false } sha2 = { version = "0.10", default-features = false } sha3 = { version = "0.10", default-features = false } smallvec = { version = "1.11.0", default-features = false } +snow = { version = "0.10.0" } sp-keystore = { version = "0.45.0", default-features = true } sp-state-machine = { version = "0.49.0", default-features = false } tempfile = { version = "3.8.1" } @@ -130,6 +131,11 @@ unsigned-varint = { version = "0.7.2" } uuid = { version = "1.7.0", features = ["serde", "v4"] } void = { version = "1.0.2" } wasm-timer = { version = "0.2.5" } +webpki = { version = "0.22.4" } +x25519-dalek = { version = "2.0.1" } +x509-parser = { version = "0.17.0" } +yamux = { version = "0.13.9" } +yasna = { version = "0.5.0" } zeroize = { version = "1.7.0", default-features = false } # Own dependencies @@ -175,6 +181,9 @@ frame-system = { version = "45.0.0", default-features = false } frame-system-benchmarking = { version = "45.0.0", default-features = false } frame-system-rpc-runtime-api = { version = "40.0.0", default-features = false } frame-try-runtime = { version = "0.51.0", default-features = false } +hickory-resolver = { version = "0.25.2" } +multiaddr = { version = "0.17.0" } +multihash = { version = "0.17.0", default-features = false } pallet-assets = { version = "48.1.0", default-features = false } pallet-assets-holder = { version = "0.8.0", default-features = false } pallet-conviction-voting = { version = "45.0.0", default-features = false } @@ -189,6 +198,12 @@ pallet-transaction-payment-rpc-runtime-api = { version = "45.0.0", default-featu pallet-treasury = { path = "pallets/treasury", default-features = false } pallet-utility = { version = "45.0.0", default-features = false } prometheus-endpoint = { version = "0.17.7", default-features = false, package = "substrate-prometheus-endpoint" } +quinn = { version = "0.11.9", default-features = false } +rcgen = { version = "0.14.5", default-features = false } +ring = { version = "0.17.14" } +rustls = { version = "0.23.32", default-features = false } +rustls-pki-types = { version = "1.12" } +rustls-post-quantum = { version = "0.2.4" } sc-basic-authorship = { version = "0.53.0", default-features = false } sc-block-builder = { version = "0.48.0", default-features = true } sc-cli = { version = "0.57.0", default-features = false } diff --git a/client/litep2p/Cargo.toml b/client/litep2p/Cargo.toml index fd44ad06..dd48de1c 100644 --- a/client/litep2p/Cargo.toml +++ b/client/litep2p/Cargo.toml @@ -10,60 +10,61 @@ repository = "https://github.com/Quantus-Network/chain" prost-build = "0.14" [dependencies] -async-trait = "0.1.88" +async-trait = { workspace = true } bs58 = "0.5.1" -bytes = "1.11.1" +bytes = { workspace = true } cid = "0.11.1" -futures = "0.3.27" -futures-timer = "3.0.3" +futures = { workspace = true } +futures-timer = { workspace = true } +hickory-resolver = { workspace = true } indexmap = { version = "2.9.0", features = ["std"] } -ip_network = "0.4" +ip_network = { workspace = true } libc = "0.2.158" -mockall = "0.13.1" -multiaddr = "0.17.0" -multihash = { version = "0.17.0", default-features = false, features = ["std", "multihash-impl", "identity", "sha2", "sha3", "blake2b"] } +mockall = { workspace = true } +multiaddr = { workspace = true } +multihash = { workspace = true, features = ["std", "multihash-impl", "identity", "sha2", "sha3", "blake2b"] } network-interface = "2.0.1" -parking_lot = "0.12.3" -pin-project = "1.1.10" +parking_lot = { workspace = true } +pin-project = { workspace = true } prost = "0.13.5" -rand = { version = "0.8.0", features = ["getrandom"] } -serde = "1.0.158" -sha2 = "0.10.9" +rand = { workspace = true, features = ["std", "std_rng", "getrandom"] } +serde = { workspace = true } +sha2 = { workspace = true } simple-dns = "0.11.0" -smallvec = "1.15.0" +smallvec = { workspace = true } # Noise protocol with post-quantum HFS (Hybrid Forward Secrecy) -snow = { version = "0.10.0", features = ["default-resolver", "ring-resolver", "hfs", "use-pqcrypto-kyber1024"] } +snow = { workspace = true, features = ["default-resolver", "ring-resolver", "hfs", "use-pqcrypto-kyber1024"] } socket2 = { version = "0.5.9", features = ["all"] } thiserror = "2.0.12" -tokio-stream = "0.1.17" -tokio-util = { version = "0.7.15", features = ["compat", "io", "codec"] } -tokio = { version = "1.45.0", features = ["rt", "net", "io-util", "time", "macros", "sync", "parking_lot"] } -tracing = { version = "0.1.40", features = ["log"] } -hickory-resolver = "0.25.2" +tokio = { workspace = true, features = ["rt", "net", "io-util", "time", "macros", "sync", "parking_lot"] } +tokio-stream = { workspace = true } +tokio-util = { workspace = true, features = ["compat", "io", "codec"] } +tracing = { workspace = true, features = ["log"] } uint = "0.10.0" unsigned-varint = { version = "0.8.0", features = ["codec"] } url = "2.5.4" - -x509-parser = "0.17.0" -x25519-dalek = "2.0.1" -yasna = "0.5.0" -zeroize = "1.8.1" -yamux = "0.13.9" +x25519-dalek = { workspace = true } +x509-parser = { workspace = true } +yamux = { workspace = true } +yasna = { workspace = true } +zeroize = { workspace = true } enum-display = "0.1.4" # Post-quantum cryptography -qp-rusty-crystals-dilithium = { version = "2.4.0" } +qp-rusty-crystals-dilithium = { workspace = true } # Websocket tokio-tungstenite = { version = "0.27.0", features = ["rustls-tls-native-roots", "url"], optional = true } -# QUIC -quinn = { version = "0.9.3", default-features = false, features = ["tls-rustls", "runtime-tokio"], optional = true } -rustls = { version = "0.20.7", default-features = false, features = ["dangerous_configuration"], optional = true } -ring = { version = "0.17.14", optional = true } -webpki = { version = "0.22.4", optional = true } -rcgen = { version = "0.14.5", optional = true } +# QUIC with post-quantum TLS +quinn = { workspace = true, features = ["rustls-aws-lc-rs", "runtime-tokio"], optional = true } +rcgen = { workspace = true, features = ["aws_lc_rs"], optional = true } +ring = { workspace = true, optional = true } +rustls = { workspace = true, features = ["std", "aws-lc-rs"], optional = true } +rustls-pki-types = { workspace = true, optional = true } +rustls-post-quantum = { workspace = true, optional = true } +webpki = { workspace = true, optional = true } # WebRTC str0m = { version = "0.11.1", optional = true } @@ -73,7 +74,7 @@ serde_millis = { version = "0.1", optional = true } [dev-dependencies] quickcheck = "1.0.3" -serde_json = "1.0.140" +serde_json = { workspace = true, features = ["std"] } tracing-subscriber = { version = "0.3.20", features = ["env-filter"] } futures_ringbuf = "0.4.0" hex-literal = "1.0.0" @@ -81,5 +82,5 @@ hex-literal = "1.0.0" [features] default = ["websocket", "quic"] websocket = ["dep:tokio-tungstenite"] -quic = ["dep:webpki", "dep:quinn", "dep:rustls", "dep:ring", "dep:rcgen"] +quic = ["dep:webpki", "dep:quinn", "dep:rustls", "dep:rustls-pki-types", "dep:rustls-post-quantum", "dep:ring", "dep:rcgen"] fuzz = ["serde/derive", "serde/rc", "bytes/serde", "dep:serde_millis", "cid/serde", "multihash/serde"] diff --git a/client/litep2p/src/crypto/tls/certificate.rs b/client/litep2p/src/crypto/tls/certificate.rs index f8336ab2..f013af20 100644 --- a/client/litep2p/src/crypto/tls/certificate.rs +++ b/client/litep2p/src/crypto/tls/certificate.rs @@ -27,8 +27,7 @@ use crate::{ PeerId, }; -// use libp2p_identity as identity; -// use libp2p_identity::PeerId; +use rustls::pki_types::{CertificateDer, PrivatePkcs8KeyDer}; use x509_parser::{prelude::*, signature_algorithm::SignatureAlgorithm}; /// The libp2p Public Key Extension is a X.509 extension @@ -51,14 +50,14 @@ static P2P_SIGNATURE_ALGORITHM: &rcgen::SignatureAlgorithm = &rcgen::PKCS_ECDSA_ /// certificate extension containing the public key of the given keypair. pub fn generate( identity_keypair: &Keypair, -) -> Result<(rustls::Certificate, rustls::PrivateKey), GenError> { +) -> Result<(CertificateDer<'static>, PrivatePkcs8KeyDer<'static>), GenError> { // Keypair used to sign the certificate. // SHOULD NOT be related to the host's key. // Endpoints MAY generate a new key and certificate // for every connection attempt, or they MAY reuse the same key // and certificate for multiple connections. let certificate_keypair = rcgen::KeyPair::generate_for(P2P_SIGNATURE_ALGORITHM)?; - let rustls_key = rustls::PrivateKey(certificate_keypair.serialize_der()); + let rustls_key = PrivatePkcs8KeyDer::from(certificate_keypair.serialize_der()); let certificate = { let mut params = rcgen::CertificateParams::new(vec![])?; @@ -70,7 +69,7 @@ pub fn generate( params.self_signed(&certificate_keypair)? }; - let rustls_certificate = rustls::Certificate(certificate.der().to_vec()); + let rustls_certificate = CertificateDer::from(certificate.der().to_vec()); Ok((rustls_certificate, rustls_key)) } @@ -79,7 +78,7 @@ pub fn generate( /// /// For this to succeed, the certificate must contain the specified extension and the signature must /// match the embedded public key. -pub fn parse(certificate: &rustls::Certificate) -> Result, ParseError> { +pub fn parse<'a>(certificate: &'a CertificateDer<'a>) -> Result, ParseError> { let certificate = parse_unverified(certificate.as_ref())?; certificate.verify()?; @@ -113,13 +112,39 @@ pub struct P2pExtension { #[error(transparent)] pub struct GenError(#[from] rcgen::Error); -#[derive(Debug, thiserror::Error)] -#[error(transparent)] -pub struct ParseError(#[from] pub(crate) webpki::Error); +#[derive(Debug)] +pub struct ParseError(pub(crate) webpki::Error); -#[derive(Debug, thiserror::Error)] -#[error(transparent)] -pub struct VerificationError(#[from] pub(crate) webpki::Error); +impl std::fmt::Display for ParseError { + fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result { + write!(f, "certificate parse error: {:?}", self.0) + } +} + +impl std::error::Error for ParseError {} + +impl From for ParseError { + fn from(e: webpki::Error) -> Self { + ParseError(e) + } +} + +#[derive(Debug)] +pub struct VerificationError(pub(crate) webpki::Error); + +impl std::fmt::Display for VerificationError { + fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result { + write!(f, "certificate verification error: {:?}", self.0) + } +} + +impl std::error::Error for VerificationError {} + +impl From for VerificationError { + fn from(e: webpki::Error) -> Self { + VerificationError(e) + } +} /// Internal function that only parses but does not verify the certificate. /// @@ -224,9 +249,12 @@ fn make_libp2p_extension( yasna::encode_der(&(serialized_pubkey, signature)) }; - // This extension MAY be marked critical. + // This extension MAY be marked critical according to libp2p spec. + // However, we set it as non-critical to avoid issues with rustls 0.23+ + // which rejects unknown critical extensions during certificate loading. + // Our custom verifier still validates the extension properly. let mut ext = rcgen::CustomExtension::from_oid_content(&P2P_EXT_OID, extension_content); - ext.set_criticality(true); + ext.set_criticality(false); Ok(ext) } @@ -291,7 +319,7 @@ impl P2pCertificate<'_> { // In particular, MD5 and SHA1 MUST NOT be used. RSA_PKCS1_SHA1 => return Err(webpki::Error::UnsupportedSignatureAlgorithm), ECDSA_SHA1_Legacy => return Err(webpki::Error::UnsupportedSignatureAlgorithm), - Unknown(_) => return Err(webpki::Error::UnsupportedSignatureAlgorithm), + _ => return Err(webpki::Error::UnsupportedSignatureAlgorithm), }; let spki = &self.certificate.tbs_certificate.subject_pki; let key = signature::UnparsedPublicKey::new( @@ -323,7 +351,7 @@ impl P2pCertificate<'_> { // In particular, MD5 and SHA1 MUST NOT be used. // Endpoints MUST abort the connection attempt if it is not used. let signature_scheme = self.signature_scheme()?; - // Endpoints MUST abort the connection attempt if the certificate’s + // Endpoints MUST abort the connection attempt if the certificate's // self-signature is not valid. let raw_certificate = self.certificate.tbs_certificate.as_ref(); let signature = self.certificate.signature_value.as_ref(); @@ -459,56 +487,8 @@ mod tests { ); } - // Note: The certificate signature scheme tests below verify that we can parse - // various TLS certificate formats. The p2p extension signature verification - // will fail because the extension was not signed with the certificate's private key. - // These tests verify the certificate parsing and signature scheme detection. - macro_rules! check_cert { - ($name:ident, $path:literal, $scheme:path) => { - #[test] - fn $name() { - let cert: &[u8] = include_bytes!($path); - - let cert = parse_unverified(cert).unwrap(); - assert!(cert.verify().is_err()); // Because p2p extension - // was not signed with the private key - // of the certificate. - assert_eq!(cert.signature_scheme(), Ok($scheme)); - } - }; - } - - check_cert! {ed448, "./test_assets/ed448.der", rustls::SignatureScheme::ED448} - check_cert! {ed25519_cert, "./test_assets/ed25519.der", rustls::SignatureScheme::ED25519} - check_cert! {rsa_pkcs1_sha256, "./test_assets/rsa_pkcs1_sha256.der", rustls::SignatureScheme::RSA_PKCS1_SHA256} - check_cert! {rsa_pkcs1_sha384, "./test_assets/rsa_pkcs1_sha384.der", rustls::SignatureScheme::RSA_PKCS1_SHA384} - check_cert! {rsa_pkcs1_sha512, "./test_assets/rsa_pkcs1_sha512.der", rustls::SignatureScheme::RSA_PKCS1_SHA512} - check_cert! {nistp256_sha256, "./test_assets/nistp256_sha256.der", rustls::SignatureScheme::ECDSA_NISTP256_SHA256} - check_cert! {nistp384_sha384, "./test_assets/nistp384_sha384.der", rustls::SignatureScheme::ECDSA_NISTP384_SHA384} - check_cert! {nistp521_sha512, "./test_assets/nistp521_sha512.der", rustls::SignatureScheme::ECDSA_NISTP521_SHA512} - - #[test] - fn rsa_pss_sha384() { - let cert = rustls::Certificate(include_bytes!("./test_assets/rsa_pss_sha384.der").to_vec()); - - let cert = parse(&cert).unwrap(); - - assert_eq!( - cert.signature_scheme(), - Ok(rustls::SignatureScheme::RSA_PSS_SHA384) - ); - } - - #[test] - fn nistp384_sha256() { - let cert: &[u8] = include_bytes!("./test_assets/nistp384_sha256.der"); - - let cert = parse_unverified(cert).unwrap(); - - assert!(cert.signature_scheme().is_err()); - } - - // Note: The following tests for Ed25519 keypair certificates are removed - // as we no longer support Ed25519 identity keys. Only Dilithium is supported. - // The `sanity_check` test above verifies Dilithium certificates work correctly. + // Note: The certificate signature scheme tests for classical crypto (Ed25519, RSA, ECDSA) + // have been removed because the test certificates contain Ed25519 identity keys in their + // p2p extensions, but we now only support Dilithium for identity. + // The `sanity_check` test above verifies that Dilithium certificates work correctly. } diff --git a/client/litep2p/src/crypto/tls/mod.rs b/client/litep2p/src/crypto/tls/mod.rs index eb247f00..fe9f348c 100644 --- a/client/litep2p/src/crypto/tls/mod.rs +++ b/client/litep2p/src/crypto/tls/mod.rs @@ -22,11 +22,15 @@ //! TLS configuration based on libp2p TLS specs. //! //! See . +//! +//! This implementation uses post-quantum key exchange via ML-KEM (Kyber) hybrid mode +//! when available, providing quantum-resistant forward secrecy. #![cfg_attr(docsrs, feature(doc_cfg, doc_auto_cfg))] use crate::{crypto::dilithium::Keypair, PeerId}; +use rustls::pki_types::{CertificateDer, PrivateKeyDer}; use std::sync::Arc; pub mod certificate; @@ -34,41 +38,44 @@ mod verifier; const P2P_ALPN: [u8; 6] = *b"libp2p"; -/// Create a TLS server configuration for litep2p. +/// Create a TLS server configuration for litep2p with post-quantum key exchange. pub fn make_server_config( keypair: &Keypair, ) -> Result { let (certificate, private_key) = certificate::generate(keypair)?; - let mut crypto = rustls::ServerConfig::builder() - .with_cipher_suites(verifier::CIPHERSUITES) - .with_safe_default_kx_groups() + // Use post-quantum provider with ML-KEM hybrid key exchange + let provider = rustls_post_quantum::provider(); + + let mut crypto = rustls::ServerConfig::builder_with_provider(Arc::new(provider)) .with_protocol_versions(verifier::PROTOCOL_VERSIONS) - .expect("Cipher suites and kx groups are configured; qed") + .expect("Protocol versions are valid; qed") .with_client_cert_verifier(Arc::new(verifier::Libp2pCertificateVerifier::new())) - .with_single_cert(vec![certificate], private_key) + .with_single_cert(vec![certificate], PrivateKeyDer::Pkcs8(private_key)) .expect("Server cert key DER is valid; qed"); crypto.alpn_protocols = vec![P2P_ALPN.to_vec()]; Ok(crypto) } -/// Create a TLS client configuration for libp2p. +/// Create a TLS client configuration for libp2p with post-quantum key exchange. pub fn make_client_config( keypair: &Keypair, remote_peer_id: Option, ) -> Result { let (certificate, private_key) = certificate::generate(keypair)?; - let mut crypto = rustls::ClientConfig::builder() - .with_cipher_suites(verifier::CIPHERSUITES) - .with_safe_default_kx_groups() + // Use post-quantum provider with ML-KEM hybrid key exchange + let provider = rustls_post_quantum::provider(); + + let mut crypto = rustls::ClientConfig::builder_with_provider(Arc::new(provider)) .with_protocol_versions(verifier::PROTOCOL_VERSIONS) - .expect("Cipher suites and kx groups are configured; qed") + .expect("Protocol versions are valid; qed") + .dangerous() .with_custom_certificate_verifier(Arc::new( verifier::Libp2pCertificateVerifier::with_remote_peer_id(remote_peer_id), )) - .with_single_cert(vec![certificate], private_key) + .with_client_auth_cert(vec![certificate], PrivateKeyDer::Pkcs8(private_key)) .expect("Client cert key DER is valid; qed"); crypto.alpn_protocols = vec![P2P_ALPN.to_vec()]; diff --git a/client/litep2p/src/crypto/tls/verifier.rs b/client/litep2p/src/crypto/tls/verifier.rs index 470c43c2..c506f06d 100644 --- a/client/litep2p/src/crypto/tls/verifier.rs +++ b/client/litep2p/src/crypto/tls/verifier.rs @@ -26,14 +26,10 @@ use crate::{crypto::tls::certificate, PeerId}; use rustls::{ - cipher_suite::{ - TLS13_AES_128_GCM_SHA256, TLS13_AES_256_GCM_SHA384, TLS13_CHACHA20_POLY1305_SHA256, - }, - client::{HandshakeSignatureValid, ServerCertVerified, ServerCertVerifier}, - internal::msgs::handshake::DigitallySignedStruct, - server::{ClientCertVerified, ClientCertVerifier}, - Certificate, DistinguishedNames, SignatureScheme, SupportedCipherSuite, - SupportedProtocolVersion, + client::danger::{HandshakeSignatureValid, ServerCertVerified, ServerCertVerifier}, + server::danger::{ClientCertVerified, ClientCertVerifier}, + pki_types::{CertificateDer, ServerName, UnixTime}, + DigitallySignedStruct, DistinguishedName, SignatureScheme, }; /// The protocol versions supported by this verifier. @@ -42,21 +38,12 @@ use rustls::{ /// /// > The libp2p handshake uses TLS 1.3 (and higher). /// > Endpoints MUST NOT negotiate lower TLS versions. -pub static PROTOCOL_VERSIONS: &[&SupportedProtocolVersion] = &[&rustls::version::TLS13]; - -/// A list of the TLS 1.3 cipher suites supported by rustls. -// By default rustls creates client/server configs with both -// TLS 1.3 __and__ 1.2 cipher suites. But we don't need 1.2. -pub static CIPHERSUITES: &[SupportedCipherSuite] = &[ - // TLS1.3 suites - TLS13_CHACHA20_POLY1305_SHA256, - TLS13_AES_256_GCM_SHA384, - TLS13_AES_128_GCM_SHA256, -]; +pub static PROTOCOL_VERSIONS: &[&rustls::SupportedProtocolVersion] = &[&rustls::version::TLS13]; /// Implementation of the `rustls` certificate verification traits for libp2p. /// /// Only TLS 1.3 is supported. TLS 1.2 should be disabled in the configuration of `rustls`. +#[derive(Debug)] pub struct Libp2pCertificateVerifier { /// The peer ID we intend to connect to remote_peer_id: Option, @@ -105,12 +92,11 @@ impl Libp2pCertificateVerifier { impl ServerCertVerifier for Libp2pCertificateVerifier { fn verify_server_cert( &self, - end_entity: &Certificate, - intermediates: &[Certificate], - _server_name: &rustls::ServerName, - _scts: &mut dyn Iterator, + end_entity: &CertificateDer<'_>, + intermediates: &[CertificateDer<'_>], + _server_name: &ServerName<'_>, _ocsp_response: &[u8], - _now: std::time::SystemTime, + _now: UnixTime, ) -> Result { let peer_id = verify_presented_certs(end_entity, intermediates)?; @@ -120,8 +106,8 @@ impl ServerCertVerifier for Libp2pCertificateVerifier { // the certificate matches the peer ID they intended to connect to, // and MUST abort the connection if there is a mismatch. if remote_peer_id != peer_id { - return Err(rustls::Error::PeerMisbehavedError( - "Wrong peer ID in p2p extension".to_string(), + return Err(rustls::Error::PeerMisbehaved( + rustls::PeerMisbehaved::SignedKxWithWrongAlgorithm, )); } } @@ -132,7 +118,7 @@ impl ServerCertVerifier for Libp2pCertificateVerifier { fn verify_tls12_signature( &self, _message: &[u8], - _cert: &Certificate, + _cert: &CertificateDer<'_>, _dss: &DigitallySignedStruct, ) -> Result { unreachable!("`PROTOCOL_VERSIONS` only allows TLS 1.3") @@ -141,7 +127,7 @@ impl ServerCertVerifier for Libp2pCertificateVerifier { fn verify_tls13_signature( &self, message: &[u8], - cert: &Certificate, + cert: &CertificateDer<'_>, dss: &DigitallySignedStruct, ) -> Result { verify_tls13_signature(cert, dss.scheme, message, dss.signature()) @@ -164,15 +150,15 @@ impl ClientCertVerifier for Libp2pCertificateVerifier { true } - fn client_auth_root_subjects(&self) -> Option { - Some(vec![]) + fn root_hint_subjects(&self) -> &[DistinguishedName] { + &[] } fn verify_client_cert( &self, - end_entity: &Certificate, - intermediates: &[Certificate], - _now: std::time::SystemTime, + end_entity: &CertificateDer<'_>, + intermediates: &[CertificateDer<'_>], + _now: UnixTime, ) -> Result { let _: PeerId = verify_presented_certs(end_entity, intermediates)?; @@ -182,7 +168,7 @@ impl ClientCertVerifier for Libp2pCertificateVerifier { fn verify_tls12_signature( &self, _message: &[u8], - _cert: &Certificate, + _cert: &CertificateDer<'_>, _dss: &DigitallySignedStruct, ) -> Result { unreachable!("`PROTOCOL_VERSIONS` only allows TLS 1.3") @@ -191,7 +177,7 @@ impl ClientCertVerifier for Libp2pCertificateVerifier { fn verify_tls13_signature( &self, message: &[u8], - cert: &Certificate, + cert: &CertificateDer<'_>, dss: &DigitallySignedStruct, ) -> Result { verify_tls13_signature(cert, dss.scheme, message, dss.signature()) @@ -207,10 +193,10 @@ impl ClientCertVerifier for Libp2pCertificateVerifier { /// (a) the presented certificate is not yet valid, OR /// (b) if it is expired. /// Endpoints MUST abort the connection attempt if more than one certificate is received, -/// or if the certificate’s self-signature is not valid. +/// or if the certificate's self-signature is not valid. fn verify_presented_certs( - end_entity: &Certificate, - intermediates: &[Certificate], + end_entity: &CertificateDer<'_>, + intermediates: &[CertificateDer<'_>], ) -> Result { if !intermediates.is_empty() { return Err(rustls::Error::General( @@ -224,7 +210,7 @@ fn verify_presented_certs( } fn verify_tls13_signature( - cert: &Certificate, + cert: &CertificateDer<'_>, signature_scheme: SignatureScheme, message: &[u8], signature: &[u8], @@ -238,19 +224,23 @@ impl From for rustls::Error { fn from(certificate::ParseError(e): certificate::ParseError) -> Self { use webpki::Error::*; match e { - BadDer => rustls::Error::InvalidCertificateEncoding, - e => rustls::Error::InvalidCertificateData(format!("invalid peer certificate: {e}")), + BadDer => rustls::Error::InvalidCertificate(rustls::CertificateError::BadEncoding), + e => rustls::Error::General(format!("invalid peer certificate: {e}")), } } } + impl From for rustls::Error { fn from(certificate::VerificationError(e): certificate::VerificationError) -> Self { use webpki::Error::*; match e { - InvalidSignatureForPublicKey => rustls::Error::InvalidCertificateSignature, - UnsupportedSignatureAlgorithm | UnsupportedSignatureAlgorithmForPublicKey => - rustls::Error::InvalidCertificateSignatureType, - e => rustls::Error::InvalidCertificateData(format!("invalid peer certificate: {e}")), + InvalidSignatureForPublicKey => { + rustls::Error::InvalidCertificate(rustls::CertificateError::BadSignature) + } + UnsupportedSignatureAlgorithm | UnsupportedSignatureAlgorithmForPublicKey => { + rustls::Error::General("unsupported signature algorithm".into()) + } + e => rustls::Error::General(format!("invalid peer certificate: {e}")), } } } diff --git a/client/litep2p/src/transport/quic/listener.rs b/client/litep2p/src/transport/quic/listener.rs index 569b12e2..cfb7c874 100644 --- a/client/litep2p/src/transport/quic/listener.rs +++ b/client/litep2p/src/transport/quic/listener.rs @@ -26,7 +26,7 @@ use crate::{ use futures::{future::BoxFuture, stream::FuturesUnordered, FutureExt, Stream, StreamExt}; use multiaddr::{Multiaddr, Protocol}; -use quinn::{Connecting, Endpoint, ServerConfig}; +use quinn::{Connecting, Endpoint, ServerConfig, crypto::rustls::QuicServerConfig}; use std::{ net::{IpAddr, SocketAddr}, @@ -61,14 +61,16 @@ impl QuicListener { for address in addresses.into_iter() { let (listen_address, _) = Self::get_socket_address(&address)?; - let crypto_config = Arc::new(make_server_config(keypair).expect("to succeed")); - let server_config = ServerConfig::with_crypto(crypto_config); + let rustls_config = make_server_config(keypair).expect("to succeed"); + // Convert rustls config to quinn's QuicServerConfig + let quic_server_config = QuicServerConfig::try_from(rustls_config) + .expect("valid rustls config"); + let server_config = ServerConfig::with_crypto(Arc::new(quic_server_config)); let listener = Endpoint::server(server_config, listen_address).unwrap(); let listen_address = listener.local_addr()?; listen_addresses.push(listen_address); listeners.push(listener); - // ); } let listen_multi_addresses = listen_addresses @@ -89,8 +91,14 @@ impl QuicListener { .enumerate() .map(|(i, listener)| { let inner = listener.clone(); - async move { inner.accept().await.map(|connecting| (i, connecting)) } - .boxed() + async move { + // Quinn 0.11: accept() returns Incoming, which we need to + // convert to Connecting by calling accept() + let incoming = inner.accept().await?; + let connecting = incoming.accept().ok()?; + Some((i, connecting)) + } + .boxed() }) .collect(), listeners, @@ -173,8 +181,12 @@ impl Stream for QuicListener { Some(Some((listener, future))) => { let inner = self.listeners[listener].clone(); self.incoming.push( - async move { inner.accept().await.map(|connecting| (listener, connecting)) } - .boxed(), + async move { + let incoming = inner.accept().await?; + let connecting = incoming.accept().ok()?; + Some((listener, connecting)) + } + .boxed(), ); Poll::Ready(Some(future)) @@ -188,7 +200,7 @@ mod tests { use crate::crypto::tls::make_client_config; use super::*; - use quinn::ClientConfig; + use quinn::{ClientConfig, crypto::rustls::QuicClientConfig}; use std::net::{IpAddr, Ipv4Addr, Ipv6Addr, SocketAddr}; #[test] @@ -266,9 +278,9 @@ mod tests { panic!("invalid address"); }; - let crypto_config = - Arc::new(make_client_config(&Keypair::generate(), Some(peer)).expect("to succeed")); - let client_config = ClientConfig::new(crypto_config); + let crypto_config = make_client_config(&Keypair::generate(), Some(peer)).expect("to succeed"); + let quic_client_config = QuicClientConfig::try_from(crypto_config).expect("valid config"); + let client_config = ClientConfig::new(Arc::new(quic_client_config)); let client = Endpoint::client(SocketAddr::new(IpAddr::V6(Ipv6Addr::UNSPECIFIED), 0)).unwrap(); let connection = client @@ -313,9 +325,9 @@ mod tests { panic!("invalid address"); }; - let crypto_config1 = - Arc::new(make_client_config(&Keypair::generate(), Some(peer)).expect("to succeed")); - let client_config1 = ClientConfig::new(crypto_config1); + let crypto_config1 = make_client_config(&Keypair::generate(), Some(peer)).expect("to succeed"); + let quic_client_config1 = QuicClientConfig::try_from(crypto_config1).expect("valid config"); + let client_config1 = ClientConfig::new(Arc::new(quic_client_config1)); let client1 = Endpoint::client(SocketAddr::new(IpAddr::V6(Ipv6Addr::UNSPECIFIED), 0)).unwrap(); let connection1 = client1 @@ -326,9 +338,9 @@ mod tests { ) .unwrap(); - let crypto_config2 = - Arc::new(make_client_config(&Keypair::generate(), Some(peer)).expect("to succeed")); - let client_config2 = ClientConfig::new(crypto_config2); + let crypto_config2 = make_client_config(&Keypair::generate(), Some(peer)).expect("to succeed"); + let quic_client_config2 = QuicClientConfig::try_from(crypto_config2).expect("valid config"); + let client_config2 = ClientConfig::new(Arc::new(quic_client_config2)); let client2 = Endpoint::client(SocketAddr::new(IpAddr::V4(Ipv4Addr::UNSPECIFIED), 0)).unwrap(); let connection2 = client2 @@ -381,9 +393,9 @@ mod tests { panic!("invalid address"); }; - let crypto_config1 = - Arc::new(make_client_config(&Keypair::generate(), Some(peer)).expect("to succeed")); - let client_config1 = ClientConfig::new(crypto_config1); + let crypto_config1 = make_client_config(&Keypair::generate(), Some(peer)).expect("to succeed"); + let quic_client_config1 = QuicClientConfig::try_from(crypto_config1).expect("valid config"); + let client_config1 = ClientConfig::new(Arc::new(quic_client_config1)); let client1 = Endpoint::client(SocketAddr::new(IpAddr::V6(Ipv6Addr::UNSPECIFIED), 0)).unwrap(); let connection1 = client1 @@ -394,9 +406,9 @@ mod tests { ) .unwrap(); - let crypto_config2 = - Arc::new(make_client_config(&Keypair::generate(), Some(peer)).expect("to succeed")); - let client_config2 = ClientConfig::new(crypto_config2); + let crypto_config2 = make_client_config(&Keypair::generate(), Some(peer)).expect("to succeed"); + let quic_client_config2 = QuicClientConfig::try_from(crypto_config2).expect("valid config"); + let client_config2 = ClientConfig::new(Arc::new(quic_client_config2)); let client2 = Endpoint::client(SocketAddr::new(IpAddr::V6(Ipv6Addr::UNSPECIFIED), 0)).unwrap(); let connection2 = client2 diff --git a/client/litep2p/src/transport/quic/mod.rs b/client/litep2p/src/transport/quic/mod.rs index 025b7da7..799fd51d 100644 --- a/client/litep2p/src/transport/quic/mod.rs +++ b/client/litep2p/src/transport/quic/mod.rs @@ -41,7 +41,7 @@ use futures::{ }; use hickory_resolver::TokioResolver; use multiaddr::{Multiaddr, Protocol}; -use quinn::{ClientConfig, Connecting, Connection, Endpoint, IdleTimeout}; +use quinn::{ClientConfig, Connecting, Connection, Endpoint, IdleTimeout, crypto::rustls::QuicClientConfig}; use std::{ collections::HashMap, @@ -131,7 +131,7 @@ pub(crate) struct QuicTransport { impl QuicTransport { /// Attempt to extract `PeerId` from connection certificates. fn extract_peer_id(connection: &Connection) -> Option { - let certificates: Box> = + let certificates: Box>> = connection.peer_identity()?.downcast().ok()?; let p2p_cert = crate::crypto::tls::certificate::parse(certificates.first()?) .expect("the certificate was validated during TLS handshake; qed"); @@ -257,13 +257,14 @@ impl Transport for QuicTransport { return Err(Error::AddressError(AddressError::PeerIdMissing)); }; - let crypto_config = - Arc::new(make_client_config(&self.context.keypair, Some(peer)).expect("to succeed")); + let crypto_config = make_client_config(&self.context.keypair, Some(peer)).expect("to succeed"); + let quic_client_config = QuicClientConfig::try_from(crypto_config) + .map_err(|e| Error::Other(format!("invalid crypto config: {e}")))?; let mut transport_config = quinn::TransportConfig::default(); let timeout = IdleTimeout::try_from(self.config.connection_open_timeout).expect("to succeed"); transport_config.max_idle_timeout(Some(timeout)); - let mut client_config = ClientConfig::new(crypto_config); + let mut client_config = ClientConfig::new(Arc::new(quic_client_config)); client_config.transport_config(Arc::new(transport_config)); let client_listen_address = match address.iter().next() { @@ -393,13 +394,14 @@ impl Transport for QuicTransport { let peer = peer.ok_or_else(|| DialError::AddressError(AddressError::PeerIdMissing))?; - let crypto_config = - Arc::new(make_client_config(&keypair, Some(peer)).expect("to succeed")); + let crypto_config = make_client_config(&keypair, Some(peer)).expect("to succeed"); + let quic_client_config = QuicClientConfig::try_from(crypto_config) + .expect("valid crypto config"); let mut transport_config = quinn::TransportConfig::default(); let timeout = IdleTimeout::try_from(connection_open_timeout).expect("to succeed"); transport_config.max_idle_timeout(Some(timeout)); - let mut client_config = ClientConfig::new(crypto_config); + let mut client_config = ClientConfig::new(Arc::new(quic_client_config)); client_config.transport_config(Arc::new(transport_config)); let client_listen_address = match address.iter().next() { diff --git a/client/litep2p/src/transport/quic/substream.rs b/client/litep2p/src/transport/quic/substream.rs index 8176e6af..294b796a 100644 --- a/client/litep2p/src/transport/quic/substream.rs +++ b/client/litep2p/src/transport/quic/substream.rs @@ -101,7 +101,7 @@ impl TokioAsyncWrite for Substream { buf: &[u8], ) -> Poll> { match futures::ready!(Pin::new(&mut self.send_stream).poll_write(cx, buf)) { - Err(error) => Poll::Ready(Err(error)), + Err(error) => Poll::Ready(Err(error.into())), Ok(nwritten) => { self.bandwidth_sink.increase_outbound(nwritten); Poll::Ready(Ok(nwritten)) @@ -110,14 +110,14 @@ impl TokioAsyncWrite for Substream { } fn poll_flush(mut self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll> { - Pin::new(&mut self.send_stream).poll_flush(cx) + Pin::new(&mut self.send_stream).poll_flush(cx).map_err(Into::into) } fn poll_shutdown( mut self: Pin<&mut Self>, cx: &mut Context<'_>, ) -> Poll> { - Pin::new(&mut self.send_stream).poll_shutdown(cx) + Pin::new(&mut self.send_stream).poll_shutdown(cx).map_err(Into::into) } } From 703fd075d4aa32b6b7884bcabc9281c99a426d6c Mon Sep 17 00:00:00 2001 From: illuzen Date: Fri, 29 May 2026 15:13:03 +0900 Subject: [PATCH 06/26] connect network-types to litep2p --- Cargo.lock | 126 ++---- Cargo.toml | 3 +- client/litep2p/Cargo.toml | 6 +- client/network-types/Cargo.toml | 20 +- client/network-types/src/dilithium.rs | 479 ++++++++++++++++++++++ client/network-types/src/ed25519.rs | 551 -------------------------- client/network-types/src/lib.rs | 5 +- client/network-types/src/peer_id.rs | 60 ++- 8 files changed, 574 insertions(+), 676 deletions(-) create mode 100644 client/network-types/src/dilithium.rs delete mode 100644 client/network-types/src/ed25519.rs diff --git a/Cargo.lock b/Cargo.lock index d3d28778..a7ab4b01 100644 --- a/Cargo.lock +++ b/Cargo.lock @@ -2896,7 +2896,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index" checksum = "39cab71617ae0d63f51a36d69f866391735b51691dbda63cf6f96d042b63efeb" dependencies = [ "libc", - "windows-sys 0.61.0", + "windows-sys 0.60.2", ] [[package]] @@ -5627,20 +5627,20 @@ checksum = "241eaef5fd12c88705a01fc1066c48c4b36e0dd4377dcdc7ec3942cea7a69956" [[package]] name = "litep2p" -version = "0.13.0" -source = "registry+https://github.com/rust-lang/crates.io-index" -checksum = "c68ba359d7f1a80d18821b46575d5ddb9a9a6672fe0669f5fc9e83cab9abd760" +version = "0.13.3" dependencies = [ "async-trait", "bs58", "bytes 1.11.1", "cid 0.11.1", - "ed25519-dalek", "enum-display", "futures 0.3.31", "futures-timer", + "futures_ringbuf", + "hex-literal 1.1.0", "hickory-resolver 0.25.2", "indexmap", + "ip_network", "libc", "mockall", "multiaddr 0.17.1", @@ -5650,23 +5650,35 @@ dependencies = [ "pin-project", "prost 0.13.5", "prost-build 0.14.3", + "qp-rusty-crystals-dilithium", + "quickcheck", + "quinn", "rand 0.8.5", + "rcgen 0.14.8", "ring 0.17.14", + "rustls", + "rustls-pki-types", + "rustls-post-quantum", "serde", + "serde_json", + "serde_millis", "sha2 0.10.9", "simple-dns", "smallvec", - "snow 0.9.6", + "snow", "socket2 0.5.10", + "str0m", "thiserror 2.0.18", "tokio 1.47.1", "tokio-stream", "tokio-tungstenite", "tokio-util", "tracing", + "tracing-subscriber", "uint 0.10.0", "unsigned-varint 0.8.0", "url", + "webpki", "x25519-dalek", "x509-parser 0.17.0", "yamux 0.13.10", @@ -6309,7 +6321,7 @@ version = "0.50.3" source = "registry+https://github.com/rust-lang/crates.io-index" checksum = "7957b9740744892f114936ab4a57b3f487491bbeafaf8083688b16841a4240e5" dependencies = [ - "windows-sys 0.61.0", + "windows-sys 0.60.2", ] [[package]] @@ -8146,8 +8158,8 @@ version = "0.13.5" source = "registry+https://github.com/rust-lang/crates.io-index" checksum = "be769465445e8c1474e9c5dac2018218498557af32d9ed057325ec9a41ae81bf" dependencies = [ - "heck 0.5.0", - "itertools 0.14.0", + "heck 0.4.1", + "itertools 0.10.5", "log", "multimap", "once_cell", @@ -8166,8 +8178,8 @@ version = "0.14.3" source = "registry+https://github.com/rust-lang/crates.io-index" checksum = "343d3bd7056eda839b03204e68deff7d1b13aba7af2b2fd16890697274262ee7" dependencies = [ - "heck 0.5.0", - "itertools 0.14.0", + "heck 0.4.1", + "itertools 0.10.5", "log", "multimap", "petgraph 0.8.3", @@ -8199,7 +8211,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index" checksum = "8a56d757972c98b346a9b766e3f02746cde6dd1cd1d1d563472929fdd74bec4d" dependencies = [ "anyhow", - "itertools 0.14.0", + "itertools 0.10.5", "proc-macro2", "quote", "syn 2.0.106", @@ -8212,7 +8224,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index" checksum = "27c6023962132f4b30eb4c172c91ce92d933da334c59c23cddee82358ddafb0b" dependencies = [ "anyhow", - "itertools 0.14.0", + "itertools 0.10.5", "proc-macro2", "quote", "syn 2.0.106", @@ -8299,67 +8311,6 @@ dependencies = [ name = "qp-high-security" version = "0.1.0" -[[package]] -name = "qp-litep2p" -version = "0.13.2" -dependencies = [ - "async-trait", - "bs58", - "bytes 1.11.1", - "cid 0.11.1", - "enum-display", - "futures 0.3.31", - "futures-timer", - "futures_ringbuf", - "hex-literal 1.1.0", - "hickory-resolver 0.25.2", - "indexmap", - "ip_network", - "libc", - "mockall", - "multiaddr 0.17.1", - "multihash 0.17.0", - "network-interface", - "parking_lot 0.12.4", - "pin-project", - "prost 0.13.5", - "prost-build 0.14.3", - "qp-rusty-crystals-dilithium", - "quickcheck", - "quinn", - "rand 0.8.5", - "rcgen 0.14.8", - "ring 0.17.14", - "rustls", - "rustls-pki-types", - "rustls-post-quantum", - "serde", - "serde_json", - "serde_millis", - "sha2 0.10.9", - "simple-dns", - "smallvec", - "snow 0.10.0", - "socket2 0.5.10", - "str0m", - "thiserror 2.0.18", - "tokio 1.47.1", - "tokio-stream", - "tokio-tungstenite", - "tokio-util", - "tracing", - "tracing-subscriber", - "uint 0.10.0", - "unsigned-varint 0.8.0", - "url", - "webpki", - "x25519-dalek", - "x509-parser 0.17.0", - "yamux 0.13.10", - "yasna 0.5.2", - "zeroize", -] - [[package]] name = "qp-plonky2" version = "1.4.1" @@ -9387,7 +9338,7 @@ dependencies = [ "errno", "libc", "linux-raw-sys", - "windows-sys 0.61.0", + "windows-sys 0.60.2", ] [[package]] @@ -9467,7 +9418,7 @@ dependencies = [ "security-framework", "security-framework-sys", "webpki-root-certs 1.0.2", - "windows-sys 0.61.0", + "windows-sys 0.60.2", ] [[package]] @@ -10196,19 +10147,18 @@ dependencies = [ [[package]] name = "sc-network-types" -version = "0.20.1" -source = "registry+https://github.com/rust-lang/crates.io-index" -checksum = "11103f2e35999989326ed5be87f0a7d335269bef6d6a1c0ddd543a7d9aed7788" +version = "0.20.3" dependencies = [ "bs58", "bytes 1.11.1", - "ed25519-dalek", "libp2p-identity", "libp2p-kad", "litep2p", "log", "multiaddr 0.18.2", "multihash 0.19.3", + "qp-rusty-crystals-dilithium", + "quickcheck", "rand 0.8.5", "serde", "serde_with", @@ -11344,18 +11294,6 @@ version = "1.1.1" source = "registry+https://github.com/rust-lang/crates.io-index" checksum = "1b6b67fb9a61334225b5b790716f609cd58395f895b3fe8b328786812a40bc3b" -[[package]] -name = "snow" -version = "0.9.6" -source = "registry+https://github.com/rust-lang/crates.io-index" -checksum = "850948bee068e713b8ab860fe1adc4d109676ab4c3b621fd8147f06b261f2f85" -dependencies = [ - "rand_core 0.6.4", - "ring 0.17.14", - "rustc_version", - "subtle 2.6.1", -] - [[package]] name = "snow" version = "0.10.0" @@ -12760,7 +12698,7 @@ dependencies = [ "getrandom 0.3.3", "once_cell", "rustix", - "windows-sys 0.61.0", + "windows-sys 0.60.2", ] [[package]] @@ -14287,7 +14225,7 @@ version = "0.1.11" source = "registry+https://github.com/rust-lang/crates.io-index" checksum = "c2a7b1c03c876122aa43f3020e6c3c3ee5c05081c9a00739faf7503aeba10d22" dependencies = [ - "windows-sys 0.61.0", + "windows-sys 0.60.2", ] [[package]] diff --git a/Cargo.toml b/Cargo.toml index 794c93ca..33251a62 100644 --- a/Cargo.toml +++ b/Cargo.toml @@ -139,7 +139,7 @@ yasna = { version = "0.5.0" } zeroize = { version = "1.7.0", default-features = false } # Own dependencies -qp-litep2p = { path = "./client/litep2p", default-features = false } +litep2p = { path = "./client/litep2p", default-features = false } pallet-balances = { version = "46.0.0", default-features = false } pallet-mining-rewards = { path = "./pallets/mining-rewards", default-features = false } pallet-multisig = { path = "./pallets/multisig", default-features = false } @@ -254,6 +254,7 @@ frame-storage-access-test-runtime = { path = "./patches/frame-storage-access-tes frame-system = { path = "./pallets/frame-system" } libp2p-identity = { git = "https://github.com/Quantus-Network/qp-libp2p-identity", tag = "v0.2.11_patch_qp_rusty_crystals_dilithium_2_1" } libp2p-noise = { git = "https://github.com/Quantus-Network/qp-libp2p-noise", tag = "v0.45.10" } +litep2p = { path = "./client/litep2p" } sc-cli = { path = "./client/cli" } sc-network = { path = "client/network" } sc-network-sync = { path = "client/network-sync" } diff --git a/client/litep2p/Cargo.toml b/client/litep2p/Cargo.toml index dd48de1c..73998ae3 100644 --- a/client/litep2p/Cargo.toml +++ b/client/litep2p/Cargo.toml @@ -1,7 +1,7 @@ [package] -name = "qp-litep2p" +name = "litep2p" description = "Post-quantum peer-to-peer networking library for Quantus Network" -version = "0.13.2" +version = "0.13.3" edition = "2021" license = "MIT" repository = "https://github.com/Quantus-Network/chain" @@ -84,3 +84,5 @@ default = ["websocket", "quic"] websocket = ["dep:tokio-tungstenite"] quic = ["dep:webpki", "dep:quinn", "dep:rustls", "dep:rustls-pki-types", "dep:rustls-post-quantum", "dep:ring", "dep:rcgen"] fuzz = ["serde/derive", "serde/rc", "bytes/serde", "dep:serde_millis", "cid/serde", "multihash/serde"] +# Compatibility feature - RSA support removed in favor of post-quantum Dilithium +rsa = [] diff --git a/client/network-types/Cargo.toml b/client/network-types/Cargo.toml index ce728e95..3950e37f 100644 --- a/client/network-types/Cargo.toml +++ b/client/network-types/Cargo.toml @@ -1,13 +1,13 @@ [package] -authors = ["Parity Technologies "] -description = "Substrate network types" -documentation = "https://docs.rs/sc-network-types" -edition = "2021" -homepage = "https://paritytech.github.io/polkadot-sdk/" -license = "GPL-3.0-or-later WITH Classpath-exception-2.0" name = "sc-network-types" -repository = "https://github.com/paritytech/polkadot-sdk.git" version = "0.20.3" +authors = ["Parity Technologies ", "Quantus Network Developers "] +edition = "2021" +description = "Substrate network types with Dilithium support" +homepage = "https://quantus.com/" +documentation = "https://docs.rs/sc-network-types" +license = "GPL-3.0-or-later WITH Classpath-exception-2.0" +repository = "https://github.com/quantus-network/chain" [lib] name = "sc_network_types" @@ -16,13 +16,13 @@ path = "src/lib.rs" [dependencies] bs58 = "0.5.1" bytes = { workspace = true } -ed25519-dalek = "2.1" -libp2p-identity = { workspace = true, features = ["ed25519", "peerid", "rand"] } +libp2p-identity = { workspace = true } libp2p-kad = { version = "0.46.2", default-features = false } -litep2p = { version = "0.13.3", features = ["rsa", "websocket"] } +litep2p = { workspace = true } log = { workspace = true } multiaddr = "0.18.1" multihash = { version = "0.19.1", default-features = false } +qp-rusty-crystals-dilithium = { workspace = true } rand = { workspace = true } serde = { workspace = true } serde_with = { version = "3.12.0", default-features = false, features = ["hex", "macros"] } diff --git a/client/network-types/src/dilithium.rs b/client/network-types/src/dilithium.rs new file mode 100644 index 00000000..bd2c1098 --- /dev/null +++ b/client/network-types/src/dilithium.rs @@ -0,0 +1,479 @@ +// This file is part of Substrate. + +// Copyright (C) Parity Technologies (UK) Ltd. +// Copyright (C) Quantus Network Developers +// SPDX-License-Identifier: GPL-3.0-or-later WITH Classpath-exception-2.0 + +// This program is free software: you can redistribute it and/or modify +// it under the terms of the GNU General Public License as published by +// the Free Software Foundation, either version 3 of the License, or +// (at your option) any later version. + +// This program is distributed in the hope that it will be useful, +// but WITHOUT ANY WARRANTY; without even the implied warranty of +// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +// GNU General Public License for more details. + +// You should have received a copy of the GNU General Public License +// along with this program. If not, see . + +//! Dilithium ML-DSA-87 keys for post-quantum cryptography. +//! +//! This module provides type conversions between: +//! - Substrate's Dilithium types (this module) +//! - litep2p's Dilithium types + +use crate::PeerId; +use core::{cmp, fmt, hash}; +use litep2p::crypto::dilithium as litep2p_dilithium; +use qp_rusty_crystals_dilithium::{ml_dsa_87, SensitiveBytes32}; +use zeroize::Zeroize; + +/// Size of the Dilithium public key in bytes. +pub const PUBLIC_KEY_BYTES: usize = ml_dsa_87::PUBLICKEYBYTES; + +/// Size of the Dilithium signature in bytes. +pub const SIGNATURE_BYTES: usize = ml_dsa_87::SIGNBYTES; + +/// Size of the seed used to generate a keypair (32 bytes). +pub const SEED_BYTES: usize = 32; + +/// A Dilithium ML-DSA-87 keypair. +/// +/// Internally stores the 32-byte seed and the public key. +/// The full secret key is derived on-demand when signing. +#[derive(Clone)] +pub struct Keypair { + /// The seed used to generate the keypair (32 bytes). + seed: [u8; SEED_BYTES], + /// The public key. + public: ml_dsa_87::PublicKey, +} + +impl Keypair { + /// Generate a new random Dilithium keypair. + pub fn generate() -> Keypair { + Keypair::from(SecretKey::generate()) + } + + /// Convert the keypair into a byte array. + /// + /// Returns the 32-byte seed concatenated with the public key bytes. + /// Format: [seed (32 bytes)][public key (2592 bytes)] + pub fn to_bytes(&self) -> Vec { + let mut bytes = Vec::with_capacity(SEED_BYTES + PUBLIC_KEY_BYTES); + bytes.extend_from_slice(&self.seed); + bytes.extend_from_slice(&self.public.to_bytes()); + bytes + } + + /// Try to parse a keypair from bytes, zeroing the input on success. + /// + /// Accepts either: + /// - 32 bytes (seed only) - public key will be regenerated + /// - 32 + 2592 bytes (seed + public key) + pub fn try_from_bytes(kp: &mut [u8]) -> Result { + if kp.len() == SEED_BYTES { + // Seed only - regenerate the keypair + let mut seed = [0u8; SEED_BYTES]; + seed.copy_from_slice(kp); + kp.zeroize(); + + let sensitive_seed = SensitiveBytes32::from(&mut seed.clone()); + let internal_kp = ml_dsa_87::Keypair::generate(sensitive_seed); + + Ok(Keypair { seed, public: internal_kp.public }) + } else if kp.len() == SEED_BYTES + PUBLIC_KEY_BYTES { + // Full keypair + let mut seed = [0u8; SEED_BYTES]; + seed.copy_from_slice(&kp[..SEED_BYTES]); + + let public = ml_dsa_87::PublicKey::from_bytes(&kp[SEED_BYTES..]) + .map_err(|e| DecodingError::KeypairParseError(format!("{e:?}").into()))?; + + kp.zeroize(); + + Ok(Keypair { seed, public }) + } else { + Err(DecodingError::KeypairParseError(Box::new(std::io::Error::new( + std::io::ErrorKind::InvalidData, + format!( + "Invalid Dilithium keypair length: expected {} or {} bytes, got {}", + SEED_BYTES, + SEED_BYTES + PUBLIC_KEY_BYTES, + kp.len() + ), + )))) + } + } + + /// Sign a message using the private key of this keypair. + pub fn sign(&self, msg: &[u8]) -> Vec { + // Regenerate the full keypair from seed for signing + let mut seed_copy = self.seed; + let sensitive_seed = SensitiveBytes32::from(&mut seed_copy); + let internal_kp = ml_dsa_87::Keypair::generate(sensitive_seed); + + // Sign without context, with hedged randomness for side-channel protection + let mut hedge = [0u8; 32]; + rand::RngCore::fill_bytes(&mut rand::rngs::OsRng, &mut hedge); + + internal_kp.sign(msg, None, Some(hedge)).expect("Signing should not fail").to_vec() + } + + /// Get the public key of this keypair. + pub fn public(&self) -> PublicKey { + PublicKey(self.public.clone()) + } + + /// Get the secret key (seed) of this keypair. + pub fn secret(&self) -> SecretKey { + SecretKey(self.seed) + } +} + +impl fmt::Debug for Keypair { + fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { + f.debug_struct("Keypair").field("public", &self.public).finish_non_exhaustive() + } +} + +impl From for Keypair { + fn from(kp: litep2p_dilithium::Keypair) -> Self { + Self::try_from_bytes(&mut kp.to_bytes()) + .expect("litep2p Dilithium keypair to use the same format") + } +} + +impl From for litep2p_dilithium::Keypair { + fn from(kp: Keypair) -> Self { + Self::try_from_bytes(&mut kp.to_bytes()) + .expect("Substrate Dilithium keypair to use the same format") + } +} + +/// Demote a Dilithium keypair to a secret key (seed). +impl From for SecretKey { + fn from(kp: Keypair) -> SecretKey { + SecretKey(kp.seed) + } +} + +/// Promote a Dilithium secret key (seed) into a keypair. +impl From for Keypair { + fn from(sk: SecretKey) -> Keypair { + let mut seed_copy = sk.0; + let sensitive_seed = SensitiveBytes32::from(&mut seed_copy); + let internal_kp = ml_dsa_87::Keypair::generate(sensitive_seed); + + Keypair { seed: sk.0, public: internal_kp.public } + } +} + +/// A Dilithium ML-DSA-87 public key. +#[derive(Eq, Clone)] +pub struct PublicKey(ml_dsa_87::PublicKey); + +impl fmt::Debug for PublicKey { + fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { + f.write_str("PublicKey(Dilithium): ")?; + // Only show first 8 bytes for readability + for byte in &self.0.bytes[..8] { + write!(f, "{byte:02x}")?; + } + write!(f, "...")?; + Ok(()) + } +} + +impl cmp::PartialEq for PublicKey { + fn eq(&self, other: &Self) -> bool { + self.0.bytes.eq(&other.0.bytes) + } +} + +impl hash::Hash for PublicKey { + fn hash(&self, state: &mut H) { + self.0.bytes.hash(state); + } +} + +impl cmp::PartialOrd for PublicKey { + fn partial_cmp(&self, other: &Self) -> Option { + Some(self.cmp(other)) + } +} + +impl cmp::Ord for PublicKey { + fn cmp(&self, other: &Self) -> cmp::Ordering { + self.0.bytes.cmp(&other.0.bytes) + } +} + +impl PublicKey { + /// Verify the Dilithium signature on a message using the public key. + pub fn verify(&self, msg: &[u8], sig: &[u8]) -> bool { + self.0.verify(msg, sig, None) + } + + /// Convert the public key to a byte array. + pub fn to_bytes(&self) -> Vec { + self.0.to_bytes().to_vec() + } + + /// Try to parse a public key from a byte slice. + pub fn try_from_bytes(k: &[u8]) -> Result { + ml_dsa_87::PublicKey::from_bytes(k) + .map(PublicKey) + .map_err(|e| DecodingError::PublicKeyParseError(format!("{e:?}").into())) + } + + /// Convert public key to `PeerId`. + pub fn to_peer_id(&self) -> PeerId { + let litep2p_pk: litep2p_dilithium::PublicKey = self.clone().into(); + let public_key = litep2p::crypto::PublicKey::from(litep2p_pk); + litep2p::PeerId::from_public_key(&public_key).into() + } +} + +impl From for PublicKey { + fn from(k: litep2p_dilithium::PublicKey) -> Self { + Self::try_from_bytes(&k.to_bytes()).expect("litep2p Dilithium public key to parse") + } +} + +impl From for litep2p_dilithium::PublicKey { + fn from(k: PublicKey) -> Self { + Self::try_from_bytes(&k.to_bytes()).expect("Substrate Dilithium public key to parse") + } +} + +/// A Dilithium secret key (stored as 32-byte seed). +#[derive(Clone)] +pub struct SecretKey([u8; SEED_BYTES]); + +/// View the bytes of the secret key (seed). +impl AsRef<[u8]> for SecretKey { + fn as_ref(&self) -> &[u8] { + &self.0[..] + } +} + +impl fmt::Debug for SecretKey { + fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { + write!(f, "SecretKey(Dilithium)") + } +} + +impl SecretKey { + /// Generate a new Dilithium secret key (seed). + pub fn generate() -> SecretKey { + let mut seed = [0u8; SEED_BYTES]; + rand::RngCore::fill_bytes(&mut rand::rngs::OsRng, &mut seed); + SecretKey(seed) + } + + /// Try to parse a Dilithium secret key from a byte slice, + /// zeroing the input on success. + pub fn try_from_bytes(mut sk_bytes: impl AsMut<[u8]>) -> Result { + let sk_bytes = sk_bytes.as_mut(); + let secret = <[u8; SEED_BYTES]>::try_from(&*sk_bytes) + .map_err(|e| DecodingError::SecretKeyParseError(Box::new(e)))?; + sk_bytes.zeroize(); + Ok(SecretKey(secret)) + } + + /// Convert this secret key to a byte array. + pub fn to_bytes(&self) -> [u8; SEED_BYTES] { + self.0 + } +} + +impl Drop for SecretKey { + fn drop(&mut self) { + self.0.zeroize(); + } +} + +impl From for SecretKey { + fn from(sk: litep2p_dilithium::SecretKey) -> Self { + Self::try_from_bytes(&mut sk.to_bytes()).expect("Dilithium seed to be 32 bytes") + } +} + +impl From for litep2p_dilithium::SecretKey { + fn from(sk: SecretKey) -> Self { + Self::try_from_bytes(&mut sk.to_bytes()) + .expect("litep2p `SecretKey` to accept 32 bytes as Dilithium seed") + } +} + +/// Error when decoding Dilithium-related types. +#[derive(Debug, thiserror::Error)] +pub enum DecodingError { + #[error("failed to parse Dilithium keypair: {0}")] + KeypairParseError(Box), + #[error("failed to parse Dilithium secret key: {0}")] + SecretKeyParseError(Box), + #[error("failed to parse Dilithium public key: {0}")] + PublicKeyParseError(Box), +} + +#[cfg(test)] +mod tests { + use super::*; + + fn eq_keypairs(kp1: &Keypair, kp2: &Keypair) -> bool { + kp1.public() == kp2.public() && kp1.seed == kp2.seed + } + + #[test] + fn dilithium_keypair_encode_decode() { + let kp1 = Keypair::generate(); + let mut kp1_enc = kp1.to_bytes(); + let kp2 = Keypair::try_from_bytes(&mut kp1_enc).unwrap(); + assert!(eq_keypairs(&kp1, &kp2)); + // Verify the bytes were zeroized + assert!(kp1_enc.iter().all(|b| *b == 0)); + } + + #[test] + fn dilithium_keypair_from_seed_only() { + let kp1 = Keypair::generate(); + let mut seed = kp1.secret().to_bytes().to_vec(); + let kp2 = Keypair::try_from_bytes(&mut seed[..]).unwrap(); + assert!(eq_keypairs(&kp1, &kp2)); + } + + #[test] + fn dilithium_keypair_from_secret() { + let kp1 = Keypair::generate(); + let sk = kp1.secret(); + let kp2 = Keypair::from(sk); + assert!(eq_keypairs(&kp1, &kp2)); + } + + #[test] + fn dilithium_signature() { + let kp = Keypair::generate(); + let pk = kp.public(); + + let msg = "hello world".as_bytes(); + let sig = kp.sign(msg); + assert!(pk.verify(msg, &sig)); + + let mut invalid_sig = sig.clone(); + invalid_sig[3..6].copy_from_slice(&[10, 23, 42]); + assert!(!pk.verify(msg, &invalid_sig)); + + let invalid_msg = "h3ll0 w0rld".as_bytes(); + assert!(!pk.verify(invalid_msg, &sig)); + } + + #[test] + fn substrate_kp_to_litep2p() { + let kp = Keypair::generate(); + let kp_bytes = kp.to_bytes(); + let kp1: litep2p_dilithium::Keypair = kp.clone().into(); + + assert_eq!(kp_bytes, kp1.to_bytes()); + + let msg = "hello world".as_bytes(); + let sig = kp.sign(msg); + let sig1 = kp1.sign(msg); + + // Note: Dilithium signatures include randomness, so we verify instead of comparing + let pk = kp.public(); + let pk1 = kp1.public(); + + assert!(pk.verify(msg, &sig)); + assert!(pk.verify(msg, &sig1)); + assert!(pk1.verify(msg, &sig)); + assert!(pk1.verify(msg, &sig1)); + } + + #[test] + fn litep2p_kp_to_substrate_kp() { + let kp = litep2p_dilithium::Keypair::generate(); + let kp1: Keypair = kp.clone().into(); + let kp2 = Keypair::try_from_bytes(&mut kp.to_bytes()).unwrap(); + + assert_eq!(kp.to_bytes(), kp1.to_bytes()); + + let msg = "hello world".as_bytes(); + let sig = kp.sign(msg); + + let pk1 = kp1.public(); + let pk2 = kp2.public(); + + assert!(pk1.verify(msg, &sig)); + assert!(pk2.verify(msg, &sig)); + } + + #[test] + fn substrate_pk_to_litep2p() { + let kp = Keypair::generate(); + let pk = kp.public(); + let pk_bytes = pk.to_bytes(); + let pk1: litep2p_dilithium::PublicKey = pk.clone().into(); + + assert_eq!(pk_bytes, pk1.to_bytes()); + + let msg = "hello world".as_bytes(); + let sig = kp.sign(msg); + + assert!(pk.verify(msg, &sig)); + assert!(pk1.verify(msg, &sig)); + } + + #[test] + fn litep2p_pk_to_substrate_pk() { + let kp = litep2p_dilithium::Keypair::generate(); + let pk = kp.public(); + let pk_bytes = pk.clone().to_bytes(); + let pk1: PublicKey = pk.clone().into(); + let pk2 = PublicKey::try_from_bytes(&pk_bytes).unwrap(); + + assert_eq!(pk_bytes, pk1.to_bytes()); + + let msg = "hello world".as_bytes(); + let sig = kp.sign(msg); + + assert!(pk.verify(msg, &sig)); + assert!(pk1.verify(msg, &sig)); + assert!(pk2.verify(msg, &sig)); + } + + #[test] + fn substrate_sk_to_litep2p() { + let sk = SecretKey::generate(); + let sk1: litep2p_dilithium::SecretKey = sk.clone().into(); + + let kp: Keypair = sk.into(); + let kp1: litep2p_dilithium::Keypair = sk1.into(); + + let msg = "hello world".as_bytes(); + let sig = kp.sign(msg); + + // Verify with both keypairs' public keys + assert!(kp.public().verify(msg, &sig)); + assert!(kp1.public().verify(msg, &sig)); + } + + #[test] + fn litep2p_sk_to_substrate_sk() { + let sk = litep2p_dilithium::SecretKey::generate(); + let sk1: SecretKey = sk.clone().into(); + let sk2 = SecretKey::try_from_bytes(&mut sk.to_bytes()).unwrap(); + + let kp: litep2p_dilithium::Keypair = sk.into(); + let kp1: Keypair = sk1.into(); + let kp2: Keypair = sk2.into(); + + let msg = "hello world".as_bytes(); + let sig = kp.sign(msg); + + assert!(kp1.public().verify(msg, &sig)); + assert!(kp2.public().verify(msg, &sig)); + } +} diff --git a/client/network-types/src/ed25519.rs b/client/network-types/src/ed25519.rs deleted file mode 100644 index acaa0175..00000000 --- a/client/network-types/src/ed25519.rs +++ /dev/null @@ -1,551 +0,0 @@ -// This file is part of Substrate. - -// Copyright (C) Parity Technologies (UK) Ltd. -// SPDX-License-Identifier: GPL-3.0-or-later WITH Classpath-exception-2.0 - -// This program is free software: you can redistribute it and/or modify -// it under the terms of the GNU General Public License as published by -// the Free Software Foundation, either version 3 of the License, or -// (at your option) any later version. - -// This program is distributed in the hope that it will be useful, -// but WITHOUT ANY WARRANTY; without even the implied warranty of -// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the -// GNU General Public License for more details. - -// You should have received a copy of the GNU General Public License -// along with this program. If not, see . - -//! Ed25519 keys. - -use crate::PeerId; -use core::{cmp, fmt, hash}; -use ed25519_dalek::{self as ed25519, Signer as _, Verifier as _}; -use libp2p_identity::ed25519 as libp2p_ed25519; -use litep2p::crypto::ed25519 as litep2p_ed25519; -use zeroize::Zeroize; - -/// An Ed25519 keypair. -#[derive(Clone)] -pub struct Keypair(ed25519::SigningKey); - -impl Keypair { - /// Generate a new random Ed25519 keypair. - pub fn generate() -> Keypair { - Keypair::from(SecretKey::generate()) - } - - /// Convert the keypair into a byte array by concatenating the bytes - /// of the secret scalar and the compressed public point, - /// an informal standard for encoding Ed25519 keypairs. - pub fn to_bytes(&self) -> [u8; 64] { - self.0.to_keypair_bytes() - } - - /// Try to parse a keypair from the [binary format](https://datatracker.ietf.org/doc/html/rfc8032#section-5.1.5) - /// produced by [`Keypair::to_bytes`], zeroing the input on success. - /// - /// Note that this binary format is the same as `ed25519_dalek`'s and `ed25519_zebra`'s. - pub fn try_from_bytes(kp: &mut [u8]) -> Result { - let bytes = <[u8; 64]>::try_from(&*kp) - .map_err(|e| DecodingError::KeypairParseError(Box::new(e)))?; - - ed25519::SigningKey::from_keypair_bytes(&bytes) - .map(|k| { - kp.zeroize(); - Keypair(k) - }) - .map_err(|e| DecodingError::KeypairParseError(Box::new(e))) - } - - /// Sign a message using the private key of this keypair. - pub fn sign(&self, msg: &[u8]) -> Vec { - self.0.sign(msg).to_bytes().to_vec() - } - - /// Get the public key of this keypair. - pub fn public(&self) -> PublicKey { - PublicKey(self.0.verifying_key()) - } - - /// Get the secret key of this keypair. - pub fn secret(&self) -> SecretKey { - SecretKey(self.0.to_bytes()) - } -} - -impl fmt::Debug for Keypair { - fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { - f.debug_struct("Keypair").field("public", &self.0.verifying_key()).finish() - } -} - -impl From for Keypair { - fn from(kp: litep2p_ed25519::Keypair) -> Self { - Self::try_from_bytes(&mut kp.to_bytes()) - .expect("ed25519_dalek in substrate & litep2p to use the same format") - } -} - -impl From for litep2p_ed25519::Keypair { - fn from(kp: Keypair) -> Self { - Self::try_from_bytes(&mut kp.to_bytes()) - .expect("ed25519_dalek in substrate & litep2p to use the same format") - } -} - -impl From for Keypair { - fn from(kp: libp2p_ed25519::Keypair) -> Self { - Self::try_from_bytes(&mut kp.to_bytes()) - .expect("ed25519_dalek in substrate & libp2p to use the same format") - } -} - -impl From for libp2p_ed25519::Keypair { - fn from(kp: Keypair) -> Self { - Self::try_from_bytes(&mut kp.to_bytes()) - .expect("ed25519_dalek in substrate & libp2p to use the same format") - } -} - -/// Demote an Ed25519 keypair to a secret key. -impl From for SecretKey { - fn from(kp: Keypair) -> SecretKey { - SecretKey(kp.0.to_bytes()) - } -} - -/// Promote an Ed25519 secret key into a keypair. -impl From for Keypair { - fn from(sk: SecretKey) -> Keypair { - let signing = ed25519::SigningKey::from_bytes(&sk.0); - Keypair(signing) - } -} - -/// An Ed25519 public key. -#[derive(Eq, Clone)] -pub struct PublicKey(ed25519::VerifyingKey); - -impl fmt::Debug for PublicKey { - fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { - f.write_str("PublicKey(compressed): ")?; - for byte in self.0.as_bytes() { - write!(f, "{byte:x}")?; - } - Ok(()) - } -} - -impl cmp::PartialEq for PublicKey { - fn eq(&self, other: &Self) -> bool { - self.0.as_bytes().eq(other.0.as_bytes()) - } -} - -impl hash::Hash for PublicKey { - fn hash(&self, state: &mut H) { - self.0.as_bytes().hash(state); - } -} - -impl cmp::PartialOrd for PublicKey { - fn partial_cmp(&self, other: &Self) -> Option { - Some(self.cmp(other)) - } -} - -impl cmp::Ord for PublicKey { - fn cmp(&self, other: &Self) -> cmp::Ordering { - self.0.as_bytes().cmp(other.0.as_bytes()) - } -} - -impl PublicKey { - /// Verify the Ed25519 signature on a message using the public key. - pub fn verify(&self, msg: &[u8], sig: &[u8]) -> bool { - ed25519::Signature::try_from(sig).and_then(|s| self.0.verify(msg, &s)).is_ok() - } - - /// Convert the public key to a byte array in compressed form, i.e. - /// where one coordinate is represented by a single bit. - pub fn to_bytes(&self) -> [u8; 32] { - self.0.to_bytes() - } - - /// Try to parse a public key from a byte array containing the actual key as produced by - /// `to_bytes`. - pub fn try_from_bytes(k: &[u8]) -> Result { - let k = - <[u8; 32]>::try_from(k).map_err(|e| DecodingError::PublicKeyParseError(Box::new(e)))?; - ed25519::VerifyingKey::from_bytes(&k) - .map_err(|e| DecodingError::PublicKeyParseError(Box::new(e))) - .map(PublicKey) - } - - /// Convert public key to `PeerId`. - pub fn to_peer_id(&self) -> PeerId { - litep2p::PeerId::from(litep2p::crypto::PublicKey::Ed25519(self.clone().into())).into() - } -} - -impl From for PublicKey { - fn from(k: litep2p_ed25519::PublicKey) -> Self { - Self::try_from_bytes(&k.to_bytes()) - .expect("ed25519_dalek in substrate & litep2p to use the same format") - } -} - -impl From for litep2p_ed25519::PublicKey { - fn from(k: PublicKey) -> Self { - Self::try_from_bytes(&k.to_bytes()) - .expect("ed25519_dalek in substrate & litep2p to use the same format") - } -} - -impl From for PublicKey { - fn from(k: libp2p_ed25519::PublicKey) -> Self { - Self::try_from_bytes(&k.to_bytes()) - .expect("ed25519_dalek in substrate & libp2p to use the same format") - } -} - -impl From for libp2p_ed25519::PublicKey { - fn from(k: PublicKey) -> Self { - Self::try_from_bytes(&k.to_bytes()) - .expect("ed25519_dalek in substrate & libp2p to use the same format") - } -} - -/// An Ed25519 secret key. -#[derive(Clone)] -pub struct SecretKey(ed25519::SecretKey); - -/// View the bytes of the secret key. -impl AsRef<[u8]> for SecretKey { - fn as_ref(&self) -> &[u8] { - &self.0[..] - } -} - -impl fmt::Debug for SecretKey { - fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { - write!(f, "SecretKey") - } -} - -impl SecretKey { - /// Generate a new Ed25519 secret key. - pub fn generate() -> SecretKey { - let signing = ed25519::SigningKey::generate(&mut rand::rngs::OsRng); - SecretKey(signing.to_bytes()) - } - - /// Try to parse an Ed25519 secret key from a byte slice - /// containing the actual key, zeroing the input on success. - /// If the bytes do not constitute a valid Ed25519 secret key, an error is - /// returned. - pub fn try_from_bytes(mut sk_bytes: impl AsMut<[u8]>) -> Result { - let sk_bytes = sk_bytes.as_mut(); - let secret = <[u8; 32]>::try_from(&*sk_bytes) - .map_err(|e| DecodingError::SecretKeyParseError(Box::new(e)))?; - sk_bytes.zeroize(); - Ok(SecretKey(secret)) - } - - pub fn to_bytes(&self) -> [u8; 32] { - self.0 - } -} - -impl Drop for SecretKey { - fn drop(&mut self) { - self.0.zeroize(); - } -} - -impl From for SecretKey { - fn from(sk: litep2p_ed25519::SecretKey) -> Self { - Self::try_from_bytes(&mut sk.to_bytes()).expect("Ed25519 key to be 32 bytes length") - } -} - -impl From for litep2p_ed25519::SecretKey { - fn from(sk: SecretKey) -> Self { - Self::try_from_bytes(&mut sk.to_bytes()) - .expect("litep2p `SecretKey` to accept 32 bytes as Ed25519 key") - } -} - -impl From for SecretKey { - fn from(sk: libp2p_ed25519::SecretKey) -> Self { - Self::try_from_bytes(&mut sk.as_ref().to_owned()) - .expect("Ed25519 key to be 32 bytes length") - } -} - -impl From for libp2p_ed25519::SecretKey { - fn from(sk: SecretKey) -> Self { - Self::try_from_bytes(&mut sk.to_bytes()) - .expect("libp2p `SecretKey` to accept 32 bytes as Ed25519 key") - } -} - -/// Error when decoding `ed25519`-related types. -#[derive(Debug, thiserror::Error)] -pub enum DecodingError { - #[error("failed to parse Ed25519 keypair: {0}")] - KeypairParseError(Box), - #[error("failed to parse Ed25519 secret key: {0}")] - SecretKeyParseError(Box), - #[error("failed to parse Ed25519 public key: {0}")] - PublicKeyParseError(Box), -} - -#[cfg(test)] -mod tests { - use super::*; - use quickcheck::*; - - fn eq_keypairs(kp1: &Keypair, kp2: &Keypair) -> bool { - kp1.public() == kp2.public() && kp1.0.to_bytes() == kp2.0.to_bytes() - } - - #[test] - fn ed25519_keypair_encode_decode() { - fn prop() -> bool { - let kp1 = Keypair::generate(); - let mut kp1_enc = kp1.to_bytes(); - let kp2 = Keypair::try_from_bytes(&mut kp1_enc).unwrap(); - eq_keypairs(&kp1, &kp2) && kp1_enc.iter().all(|b| *b == 0) - } - QuickCheck::new().tests(10).quickcheck(prop as fn() -> _); - } - - #[test] - fn ed25519_keypair_from_secret() { - fn prop() -> bool { - let kp1 = Keypair::generate(); - let mut sk = kp1.0.to_bytes(); - let kp2 = Keypair::from(SecretKey::try_from_bytes(&mut sk).unwrap()); - eq_keypairs(&kp1, &kp2) && sk == [0u8; 32] - } - QuickCheck::new().tests(10).quickcheck(prop as fn() -> _); - } - - #[test] - fn ed25519_signature() { - let kp = Keypair::generate(); - let pk = kp.public(); - - let msg = "hello world".as_bytes(); - let sig = kp.sign(msg); - assert!(pk.verify(msg, &sig)); - - let mut invalid_sig = sig.clone(); - invalid_sig[3..6].copy_from_slice(&[10, 23, 42]); - assert!(!pk.verify(msg, &invalid_sig)); - - let invalid_msg = "h3ll0 w0rld".as_bytes(); - assert!(!pk.verify(invalid_msg, &sig)); - } - - #[test] - fn substrate_kp_to_libs() { - let kp = Keypair::generate(); - let kp_bytes = kp.to_bytes(); - let kp1: libp2p_ed25519::Keypair = kp.clone().into(); - let kp2: litep2p_ed25519::Keypair = kp.clone().into(); - let kp3 = libp2p_ed25519::Keypair::try_from_bytes(&mut kp_bytes.clone()).unwrap(); - let kp4 = litep2p_ed25519::Keypair::try_from_bytes(&mut kp_bytes.clone()).unwrap(); - - assert_eq!(kp_bytes, kp1.to_bytes()); - assert_eq!(kp_bytes, kp2.to_bytes()); - - let msg = "hello world".as_bytes(); - let sig = kp.sign(msg); - let sig1 = kp1.sign(msg); - let sig2 = kp2.sign(msg); - let sig3 = kp3.sign(msg); - let sig4 = kp4.sign(msg); - - assert_eq!(sig, sig1); - assert_eq!(sig, sig2); - assert_eq!(sig, sig3); - assert_eq!(sig, sig4); - - let pk1 = kp1.public(); - let pk2 = kp2.public(); - let pk3 = kp3.public(); - let pk4 = kp4.public(); - - assert!(pk1.verify(msg, &sig)); - assert!(pk2.verify(msg, &sig)); - assert!(pk3.verify(msg, &sig)); - assert!(pk4.verify(msg, &sig)); - } - - #[test] - fn litep2p_kp_to_substrate_kp() { - let kp = litep2p_ed25519::Keypair::generate(); - let kp1: Keypair = kp.clone().into(); - let kp2 = Keypair::try_from_bytes(&mut kp.to_bytes()).unwrap(); - - assert_eq!(kp.to_bytes(), kp1.to_bytes()); - - let msg = "hello world".as_bytes(); - let sig = kp.sign(msg); - let sig1 = kp1.sign(msg); - let sig2 = kp2.sign(msg); - - assert_eq!(sig, sig1); - assert_eq!(sig, sig2); - - let pk1 = kp1.public(); - let pk2 = kp2.public(); - - assert!(pk1.verify(msg, &sig)); - assert!(pk2.verify(msg, &sig)); - } - - #[test] - fn libp2p_kp_to_substrate_kp() { - let kp = libp2p_ed25519::Keypair::generate(); - let kp1: Keypair = kp.clone().into(); - let kp2 = Keypair::try_from_bytes(&mut kp.to_bytes()).unwrap(); - - assert_eq!(kp.to_bytes(), kp1.to_bytes()); - - let msg = "hello world".as_bytes(); - let sig = kp.sign(msg); - let sig1 = kp1.sign(msg); - let sig2 = kp2.sign(msg); - - assert_eq!(sig, sig1); - assert_eq!(sig, sig2); - - let pk1 = kp1.public(); - let pk2 = kp2.public(); - - assert!(pk1.verify(msg, &sig)); - assert!(pk2.verify(msg, &sig)); - } - - #[test] - fn substrate_pk_to_libs() { - let kp = Keypair::generate(); - let pk = kp.public(); - let pk_bytes = pk.to_bytes(); - let pk1: libp2p_ed25519::PublicKey = pk.clone().into(); - let pk2: litep2p_ed25519::PublicKey = pk.clone().into(); - let pk3 = libp2p_ed25519::PublicKey::try_from_bytes(&pk_bytes).unwrap(); - let pk4 = litep2p_ed25519::PublicKey::try_from_bytes(&pk_bytes).unwrap(); - - assert_eq!(pk_bytes, pk1.to_bytes()); - assert_eq!(pk_bytes, pk2.to_bytes()); - - let msg = "hello world".as_bytes(); - let sig = kp.sign(msg); - - assert!(pk.verify(msg, &sig)); - assert!(pk1.verify(msg, &sig)); - assert!(pk2.verify(msg, &sig)); - assert!(pk3.verify(msg, &sig)); - assert!(pk4.verify(msg, &sig)); - } - - #[test] - fn litep2p_pk_to_substrate_pk() { - let kp = litep2p_ed25519::Keypair::generate(); - let pk = kp.public(); - let pk_bytes = pk.clone().to_bytes(); - let pk1: PublicKey = pk.clone().into(); - let pk2 = PublicKey::try_from_bytes(&pk_bytes).unwrap(); - - assert_eq!(pk_bytes, pk1.to_bytes()); - - let msg = "hello world".as_bytes(); - let sig = kp.sign(msg); - - assert!(pk.verify(msg, &sig)); - assert!(pk1.verify(msg, &sig)); - assert!(pk2.verify(msg, &sig)); - } - - #[test] - fn libp2p_pk_to_substrate_pk() { - let kp = libp2p_ed25519::Keypair::generate(); - let pk = kp.public(); - let pk_bytes = pk.clone().to_bytes(); - let pk1: PublicKey = pk.clone().into(); - let pk2 = PublicKey::try_from_bytes(&pk_bytes).unwrap(); - - assert_eq!(pk_bytes, pk1.to_bytes()); - - let msg = "hello world".as_bytes(); - let sig = kp.sign(msg); - - assert!(pk.verify(msg, &sig)); - assert!(pk1.verify(msg, &sig)); - assert!(pk2.verify(msg, &sig)); - } - - #[test] - fn substrate_sk_to_libs() { - let sk = SecretKey::generate(); - let sk_bytes = sk.to_bytes(); - let sk1: libp2p_ed25519::SecretKey = sk.clone().into(); - let sk2: litep2p_ed25519::SecretKey = sk.clone().into(); - let sk3 = libp2p_ed25519::SecretKey::try_from_bytes(&mut sk_bytes.clone()).unwrap(); - let sk4 = litep2p_ed25519::SecretKey::try_from_bytes(&mut sk_bytes.clone()).unwrap(); - - let kp: Keypair = sk.into(); - let kp1: libp2p_ed25519::Keypair = sk1.into(); - let kp2: litep2p_ed25519::Keypair = sk2.into(); - let kp3: libp2p_ed25519::Keypair = sk3.into(); - let kp4: litep2p_ed25519::Keypair = sk4.into(); - - let msg = "hello world".as_bytes(); - let sig = kp.sign(msg); - - assert_eq!(sig, kp1.sign(msg)); - assert_eq!(sig, kp2.sign(msg)); - assert_eq!(sig, kp3.sign(msg)); - assert_eq!(sig, kp4.sign(msg)); - } - - #[test] - fn litep2p_sk_to_substrate_sk() { - let sk = litep2p_ed25519::SecretKey::generate(); - let sk1: SecretKey = sk.clone().into(); - let sk2 = SecretKey::try_from_bytes(&mut sk.to_bytes()).unwrap(); - - let kp: litep2p_ed25519::Keypair = sk.into(); - let kp1: Keypair = sk1.into(); - let kp2: Keypair = sk2.into(); - - let msg = "hello world".as_bytes(); - let sig = kp.sign(msg); - - assert_eq!(sig, kp1.sign(msg)); - assert_eq!(sig, kp2.sign(msg)); - } - - #[test] - fn libp2p_sk_to_substrate_sk() { - let sk = libp2p_ed25519::SecretKey::generate(); - let sk_bytes = sk.as_ref().to_owned(); - let sk1: SecretKey = sk.clone().into(); - let sk2 = SecretKey::try_from_bytes(sk_bytes).unwrap(); - - let kp: libp2p_ed25519::Keypair = sk.into(); - let kp1: Keypair = sk1.into(); - let kp2: Keypair = sk2.into(); - - let msg = "hello world".as_bytes(); - let sig = kp.sign(msg); - - assert_eq!(sig, kp1.sign(msg)); - assert_eq!(sig, kp2.sign(msg)); - } -} diff --git a/client/network-types/src/lib.rs b/client/network-types/src/lib.rs index 093d8153..68b79ee0 100644 --- a/client/network-types/src/lib.rs +++ b/client/network-types/src/lib.rs @@ -1,6 +1,7 @@ // This file is part of Substrate. // Copyright (C) Parity Technologies (UK) Ltd. +// Copyright (C) Quantus Network Developers // SPDX-License-Identifier: GPL-3.0-or-later WITH Classpath-exception-2.0 // This program is free software: you can redistribute it and/or modify @@ -16,7 +17,9 @@ // You should have received a copy of the GNU General Public License // along with this program. If not, see . -pub mod ed25519; +//! Substrate network types with post-quantum Dilithium support. + +pub mod dilithium; pub mod kad; pub mod multiaddr; pub mod multihash; diff --git a/client/network-types/src/peer_id.rs b/client/network-types/src/peer_id.rs index 24cf9700..fe4e900f 100644 --- a/client/network-types/src/peer_id.rs +++ b/client/network-types/src/peer_id.rs @@ -1,6 +1,7 @@ // This file is part of Substrate. // Copyright (C) Parity Technologies (UK) Ltd. +// Copyright (C) Quantus Network Developers // SPDX-License-Identifier: GPL-3.0-or-later WITH Classpath-exception-2.0 // This program is free software: you can redistribute it and/or modify @@ -27,6 +28,8 @@ use std::{fmt, hash::Hash, str::FromStr}; /// Public keys with byte-lengths smaller than `MAX_INLINE_KEY_LENGTH` will be /// automatically used as the peer id using an identity multihash. +/// +/// Note: Dilithium public keys are 2592 bytes, so they will always be hashed. const MAX_INLINE_KEY_LENGTH: usize = 42; /// Identifier of a peer of the network. @@ -77,8 +80,9 @@ impl PeerId { pub fn from_multihash(multihash: Multihash) -> Result { match Code::try_from(multihash.code()) { Ok(Code::Sha2_256) => Ok(PeerId { multihash }), - Ok(Code::Identity) if multihash.digest().len() <= MAX_INLINE_KEY_LENGTH => - Ok(PeerId { multihash }), + Ok(Code::Identity) if multihash.digest().len() <= MAX_INLINE_KEY_LENGTH => { + Ok(PeerId { multihash }) + }, _ => Err(multihash), } } @@ -99,24 +103,29 @@ impl PeerId { bs58::encode(self.to_bytes()).into_string() } - /// Convert `PeerId` into ed25519 public key bytes. - pub fn into_ed25519(&self) -> Option<[u8; 32]> { + /// Try to extract the Dilithium public key from this `PeerId`. + /// + /// Returns `None` if the peer ID doesn't contain an identity hash + /// or if the public key is not a Dilithium key. + pub fn into_dilithium(&self) -> Option> { let hash = &self.multihash; // https://www.ietf.org/archive/id/draft-multiformats-multihash-07.html#name-the-multihash-identifier-re if hash.code() != 0 { - // Hash is not identity + // Hash is not identity - for Dilithium keys (2592 bytes), they are always hashed + // so we cannot extract the public key directly return None; } - let public = libp2p_identity::PublicKey::try_decode_protobuf(hash.digest()).ok()?; - public.try_into_ed25519().ok().map(|public| public.to_bytes()) + // Try to decode as protobuf-encoded public key + let public = litep2p::crypto::PublicKey::from_protobuf_encoding(hash.digest()).ok()?; + Some(public.to_bytes()) } - /// Get `PeerId` from ed25519 public key bytes. - pub fn from_ed25519(bytes: &[u8; 32]) -> Option { - let public = libp2p_identity::ed25519::PublicKey::try_from_bytes(bytes).ok()?; - let public: libp2p_identity::PublicKey = public.into(); - let peer_id: libp2p_identity::PeerId = public.into(); + /// Get `PeerId` from Dilithium public key bytes. + pub fn from_dilithium(bytes: &[u8]) -> Option { + let public = litep2p::crypto::dilithium::PublicKey::try_from_bytes(bytes).ok()?; + let public = litep2p::crypto::PublicKey::from(public); + let peer_id = litep2p::PeerId::from_public_key(&public); Some(peer_id.into()) } @@ -238,16 +247,33 @@ mod tests { } #[test] - fn from_ed25519() { - let keypair = litep2p::crypto::ed25519::Keypair::generate(); + fn from_dilithium() { + let keypair = litep2p::crypto::dilithium::Keypair::generate(); let original_peer_id = litep2p::PeerId::from_public_key( - &litep2p::crypto::PublicKey::Ed25519(keypair.public()), + &litep2p::crypto::PublicKey::from(keypair.public()), ); let peer_id: PeerId = original_peer_id.into(); assert_eq!(original_peer_id.to_bytes(), peer_id.to_bytes()); - let key = peer_id.into_ed25519().unwrap(); - assert_eq!(PeerId::from_ed25519(&key).unwrap(), original_peer_id.into()); + // Note: Dilithium keys are too large for identity hash, so into_dilithium + // will return None for hashed peer IDs + // We can verify round-trip through from_dilithium instead + let pk_bytes = keypair.public().to_bytes(); + let reconstructed = PeerId::from_dilithium(&pk_bytes).unwrap(); + assert_eq!(peer_id, reconstructed); + } + + #[test] + fn peer_id_roundtrip() { + let keypair = litep2p::crypto::dilithium::Keypair::generate(); + let litep2p_peer_id = litep2p::PeerId::from_public_key( + &litep2p::crypto::PublicKey::from(keypair.public()), + ); + + // litep2p -> substrate -> litep2p + let substrate_peer_id: PeerId = litep2p_peer_id.into(); + let back_to_litep2p: litep2p::PeerId = substrate_peer_id.into(); + assert_eq!(litep2p_peer_id, back_to_litep2p); } } From b388fe331087ecfc85298ff5a33a07fc2fccb579 Mon Sep 17 00:00:00 2001 From: illuzen Date: Fri, 29 May 2026 15:31:43 +0900 Subject: [PATCH 07/26] stubs to make mixnet compile --- client/network-types/src/peer_id.rs | 18 ++++++++++++++++++ 1 file changed, 18 insertions(+) diff --git a/client/network-types/src/peer_id.rs b/client/network-types/src/peer_id.rs index fe4e900f..758a9f1a 100644 --- a/client/network-types/src/peer_id.rs +++ b/client/network-types/src/peer_id.rs @@ -129,6 +129,24 @@ impl PeerId { Some(peer_id.into()) } + + /// Stub for Ed25519 compatibility - always returns `None`. + /// + /// This network uses Dilithium (post-quantum) instead of Ed25519. + /// This method exists only for API compatibility with crates like `sc-mixnet`. + #[deprecated(note = "This network uses Dilithium, not Ed25519. Use into_dilithium() instead.")] + pub fn into_ed25519(&self) -> Option<[u8; 32]> { + None + } + + /// Stub for Ed25519 compatibility - always returns `None`. + /// + /// This network uses Dilithium (post-quantum) instead of Ed25519. + /// This method exists only for API compatibility with crates like `sc-mixnet`. + #[deprecated(note = "This network uses Dilithium, not Ed25519. Use from_dilithium() instead.")] + pub fn from_ed25519(_bytes: &[u8; 32]) -> Option { + None + } } impl AsRef for PeerId { From ef500c0825f391eb2f64b2673e2664b33c1f417a Mon Sep 17 00:00:00 2001 From: illuzen Date: Fri, 29 May 2026 19:19:41 +0900 Subject: [PATCH 08/26] support litep2p as default --- Cargo.lock | 1 + client/cli/src/arg_enums.rs | 5 +- client/cli/src/params/network_params.rs | 7 +- client/network/Cargo.toml | 1 + client/network/src/config.rs | 33 + client/network/src/error.rs | 3 + client/network/src/lib.rs | 1 + client/network/src/litep2p/discovery.rs | 938 ++++++++++ client/network/src/litep2p/mod.rs | 1222 +++++++++++++ client/network/src/litep2p/peerstore.rs | 481 ++++++ client/network/src/litep2p/service.rs | 583 +++++++ client/network/src/litep2p/shim/bitswap.rs | 113 ++ client/network/src/litep2p/shim/mod.rs | 23 + .../src/litep2p/shim/notification/config.rs | 168 ++ .../src/litep2p/shim/notification/mod.rs | 374 ++++ .../src/litep2p/shim/notification/peerset.rs | 1516 +++++++++++++++++ .../litep2p/shim/notification/tests/fuzz.rs | 384 +++++ .../litep2p/shim/notification/tests/mod.rs | 22 + .../shim/notification/tests/peerset.rs | 1299 ++++++++++++++ .../litep2p/shim/request_response/metrics.rs | 78 + .../src/litep2p/shim/request_response/mod.rs | 568 ++++++ .../litep2p/shim/request_response/tests.rs | 906 ++++++++++ client/network/src/service.rs | 18 +- client/network/src/service/signature.rs | 8 + client/network/src/types.rs | 16 + node/src/command.rs | 56 +- 26 files changed, 8793 insertions(+), 31 deletions(-) create mode 100644 client/network/src/litep2p/discovery.rs create mode 100644 client/network/src/litep2p/mod.rs create mode 100644 client/network/src/litep2p/peerstore.rs create mode 100644 client/network/src/litep2p/service.rs create mode 100644 client/network/src/litep2p/shim/bitswap.rs create mode 100644 client/network/src/litep2p/shim/mod.rs create mode 100644 client/network/src/litep2p/shim/notification/config.rs create mode 100644 client/network/src/litep2p/shim/notification/mod.rs create mode 100644 client/network/src/litep2p/shim/notification/peerset.rs create mode 100644 client/network/src/litep2p/shim/notification/tests/fuzz.rs create mode 100644 client/network/src/litep2p/shim/notification/tests/mod.rs create mode 100644 client/network/src/litep2p/shim/notification/tests/peerset.rs create mode 100644 client/network/src/litep2p/shim/request_response/metrics.rs create mode 100644 client/network/src/litep2p/shim/request_response/mod.rs create mode 100644 client/network/src/litep2p/shim/request_response/tests.rs diff --git a/Cargo.lock b/Cargo.lock index a7ab4b01..39e3882b 100644 --- a/Cargo.lock +++ b/Cargo.lock @@ -10023,6 +10023,7 @@ dependencies = [ "libp2p", "libp2p-identity", "linked_hash_set", + "litep2p", "log", "mockall", "multistream-select", diff --git a/client/cli/src/arg_enums.rs b/client/cli/src/arg_enums.rs index 24a21aea..908f2995 100644 --- a/client/cli/src/arg_enums.rs +++ b/client/cli/src/arg_enums.rs @@ -310,7 +310,9 @@ impl Into for SyncMode { #[derive(Debug, Clone, Copy, ValueEnum, PartialEq)] #[value(rename_all = "lower")] pub enum NetworkBackendType { - /// Use libp2p for P2P networking. + /// Use litep2p for P2P networking (default, with Dilithium). + Litep2p, + /// Use libp2p for P2P networking (stable, with Dilithium). Libp2p, } @@ -318,6 +320,7 @@ impl Into for NetworkBackendType { fn into(self) -> sc_network::config::NetworkBackendType { match self { Self::Libp2p => sc_network::config::NetworkBackendType::Libp2p, + Self::Litep2p => sc_network::config::NetworkBackendType::Litep2p, } } } diff --git a/client/cli/src/params/network_params.rs b/client/cli/src/params/network_params.rs index 950b27b7..95751def 100644 --- a/client/cli/src/params/network_params.rs +++ b/client/cli/src/params/network_params.rs @@ -173,13 +173,14 @@ pub struct NetworkParams { /// Network backend used for P2P networking. /// - /// This build only supports Libp2p (with Dilithium for node identity). Litep2p is not - /// implemented in this fork. + /// Both backends use Dilithium (post-quantum) for node identity. + /// - litep2p: Default, lighter-weight networking stack + /// - libp2p: Battle-tested alternative #[arg( long, value_enum, value_name = "NETWORK_BACKEND", - default_value_t = NetworkBackendType::Libp2p, + default_value_t = NetworkBackendType::Litep2p, ignore_case = true, verbatim_doc_comment )] diff --git a/client/network/Cargo.toml b/client/network/Cargo.toml index 0d6ec3ca..732901da 100644 --- a/client/network/Cargo.toml +++ b/client/network/Cargo.toml @@ -39,6 +39,7 @@ futures-timer = { workspace = true } ip_network = { workspace = true } libp2p = { features = ["dns", "identify", "kad", "macros", "mdns", "noise", "ping", "request-response", "tcp", "tokio", "websocket", "yamux"], workspace = true } libp2p-identity = { workspace = true, features = ["dilithium"] } +litep2p = { path = "../litep2p", features = ["quic", "websocket"] } linked_hash_set = { workspace = true } log = { workspace = true, default-features = true } mockall = { workspace = true } diff --git a/client/network/src/config.rs b/client/network/src/config.rs index c521775a..f7f1c837 100644 --- a/client/network/src/config.rs +++ b/client/network/src/config.rs @@ -375,6 +375,39 @@ impl NodeKeyConfig { NodeKeyConfig::Dilithium(Secret::New) } + /// Evaluate a `NodeKeyConfig` to obtain a litep2p `Keypair`. + /// + /// This is used by the litep2p network backend. + pub fn into_litep2p_keypair(self) -> io::Result { + use NodeKeyConfig::*; + match self { + Dilithium(Secret::New) => Ok(litep2p::crypto::dilithium::Keypair::generate()), + + Dilithium(Secret::Input(mut k)) => { + litep2p::crypto::dilithium::Keypair::try_from_bytes(&mut k) + .map_err(|e| io::Error::new(io::ErrorKind::InvalidData, format!("{e:?}"))) + } + + Dilithium(Secret::File(f)) => get_secret( + f, + |b| { + let mut bytes = if is_hex_data(b) { + array_bytes::hex2bytes(std::str::from_utf8(b).map_err(|_| { + io::Error::new(io::ErrorKind::InvalidData, "Failed to decode hex data") + })?) + .map_err(|_| io::Error::new(io::ErrorKind::InvalidData, "Invalid hex"))? + } else { + b.to_vec() + }; + litep2p::crypto::dilithium::Keypair::try_from_bytes(&mut bytes) + .map_err(|e| io::Error::new(io::ErrorKind::InvalidData, format!("{e:?}"))) + }, + || litep2p::crypto::dilithium::Keypair::generate(), + |kp| kp.to_bytes(), + ), + } + } + /// Evaluate a `NodeKeyConfig` to obtain an identity `Keypair` (libp2p-identity, supports /// Dilithium). pub fn into_keypair(self) -> io::Result { diff --git a/client/network/src/error.rs b/client/network/src/error.rs index 07173483..00f1fb25 100644 --- a/client/network/src/error.rs +++ b/client/network/src/error.rs @@ -77,6 +77,9 @@ pub enum Error { /// Connection closed. #[error("Connection closed")] ConnectionClosed, + /// Litep2p error. + #[error("Litep2p: {0}")] + Litep2p(litep2p::error::Error), } // Make `Debug` use the `Display` implementation. diff --git a/client/network/src/lib.rs b/client/network/src/lib.rs index a85baff2..fb4ef136 100644 --- a/client/network/src/lib.rs +++ b/client/network/src/lib.rs @@ -246,6 +246,7 @@ mod behaviour; mod bitswap; +pub mod litep2p; mod protocol; #[cfg(test)] diff --git a/client/network/src/litep2p/discovery.rs b/client/network/src/litep2p/discovery.rs new file mode 100644 index 00000000..6c5eb945 --- /dev/null +++ b/client/network/src/litep2p/discovery.rs @@ -0,0 +1,938 @@ +// This file is part of Substrate. + +// Copyright (C) Parity Technologies (UK) Ltd. +// SPDX-License-Identifier: GPL-3.0-or-later WITH Classpath-exception-2.0 + +// This program is free software: you can redistribute it and/or modify +// it under the terms of the GNU General Public License as published by +// the Free Software Foundation, either version 3 of the License, or +// (at your option) any later version. + +// This program is distributed in the hope that it will be useful, +// but WITHOUT ANY WARRANTY; without even the implied warranty of +// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +// GNU General Public License for more details. + +// You should have received a copy of the GNU General Public License +// along with this program. If not, see . + +//! libp2p-related discovery code for litep2p backend. + +use crate::{ + config::{NetworkConfiguration, ProtocolId}, + peer_store::PeerStoreProvider, +}; + +use array_bytes::bytes2hex; +use futures::{FutureExt, Stream}; +use futures_timer::Delay; +use ip_network::IpNetwork; +use litep2p::{ + protocol::{ + libp2p::{ + identify::{Config as IdentifyConfig, IdentifyEvent}, + kademlia::{ + Config as KademliaConfig, ConfigBuilder as KademliaConfigBuilder, ContentProvider, + IncomingRecordValidationMode, KademliaEvent, KademliaHandle, PeerRecord, QueryId, + Quorum, Record, RecordKey, + }, + ping::{Config as PingConfig, PingEvent}, + }, + mdns::{Config as MdnsConfig, MdnsEvent}, + }, + types::multiaddr::{Multiaddr, Protocol}, + PeerId, ProtocolName, +}; +use parking_lot::RwLock; +use sc_network_types::kad::Key as KademliaKey; +use schnellru::{ByLength, LruMap}; + +use std::{ + cmp, + collections::{HashMap, HashSet, VecDeque}, + iter, + num::NonZeroUsize, + pin::Pin, + sync::Arc, + task::{Context, Poll}, + time::{Duration, Instant}, +}; + +/// Logging target for the file. +const LOG_TARGET: &str = "sub-libp2p::discovery"; + +/// Kademlia query interval. +const KADEMLIA_QUERY_INTERVAL: Duration = Duration::from_secs(5); + +/// mDNS query interval. +const MDNS_QUERY_INTERVAL: Duration = Duration::from_secs(30); + +/// The minimum number of peers we expect an answer before we terminate the request. +const GET_RECORD_REDUNDANCY_FACTOR: usize = 4; + +/// The minimum number of peers we expect to store the record before we consider the put successful. +const PUT_RECORD_REDUNDANCY_FACTOR: usize = 4; + +/// The maximum number of tracked external addresses we allow. +const MAX_EXTERNAL_ADDRESSES: u32 = 32; + +/// Number of times observed address is received from different peers before it is confirmed as +/// external. +const MIN_ADDRESS_CONFIRMATIONS: usize = 3; + +/// Discovery events. +#[derive(Debug)] +pub enum DiscoveryEvent { + /// Ping RTT measured for peer. + Ping { + /// Remote peer ID. + peer: PeerId, + + /// Ping round-trip time. + rtt: Duration, + }, + + /// Peer identified over `/ipfs/identify/1.0.0` protocol. + Identified { + /// Peer ID. + peer: PeerId, + + /// Listen addresses. + listen_addresses: Vec, + + /// Supported protocols. + supported_protocols: HashSet, + }, + + /// One or more addresses discovered. + /// + /// This event is emitted when a new peer is discovered over mDNS. + Discovered { + /// Discovered addresses. + addresses: Vec, + }, + + /// Routing table has been updated. + RoutingTableUpdate { + /// Peers that were added to routing table. + peers: HashSet, + }, + + /// New external address discovered. + ExternalAddressDiscovered { + /// Discovered address. + address: Multiaddr, + }, + + /// The external address has expired. + /// + /// This happens when the internal buffers exceed the maximum number of external addresses, + /// and this address is the oldest one. + ExternalAddressExpired { + /// Expired address. + address: Multiaddr, + }, + + /// `FIND_NODE` query succeeded. + FindNodeSuccess { + /// Query ID. + query_id: QueryId, + + /// Target. + target: PeerId, + + /// Found peers. + peers: Vec<(PeerId, Vec)>, + }, + + /// `GetRecord` query succeeded. + GetRecordSuccess { + /// Query ID. + query_id: QueryId, + }, + + /// Record was found from the DHT. + GetRecordPartialResult { + /// Query ID. + query_id: QueryId, + + /// Record. + record: PeerRecord, + }, + + /// Record was successfully stored on the DHT. + PutRecordSuccess { + /// Query ID. + query_id: QueryId, + }, + + /// Providers were successfully retrieved. + GetProvidersSuccess { + /// Query ID. + query_id: QueryId, + /// Found providers sorted by distance to provided key. + providers: Vec, + }, + + /// Query failed. + QueryFailed { + /// Query ID. + query_id: QueryId, + }, + + /// Incoming record to store. + IncomingRecord { + /// Record. + record: Record, + }, + + /// Started a random Kademlia query. + RandomKademliaStarted, +} + +/// Discovery. +pub struct Discovery { + /// Local peer ID. + local_peer_id: litep2p::PeerId, + + /// Ping event stream. + ping_event_stream: Box + Send + Unpin>, + + /// Identify event stream. + identify_event_stream: Box + Send + Unpin>, + + /// mDNS event stream, if enabled. + mdns_event_stream: Option + Send + Unpin>>, + + /// Kademlia handle. + kademlia_handle: KademliaHandle, + + /// `Peerstore` handle. + _peerstore_handle: Arc, + + /// Next Kademlia query for a random peer ID. + /// + /// If `None`, there is currently a query pending. + next_kad_query: Option, + + /// Active `FIND_NODE` query if it exists. + random_walk_query_id: Option, + + /// Pending events. + pending_events: VecDeque, + + /// Allow non-global addresses in the DHT. + allow_non_global_addresses: bool, + + /// Protocols supported by the local node. + local_protocols: HashSet, + + /// Public addresses. + public_addresses: HashSet, + + /// Listen addresses. + listen_addresses: Arc>>, + + /// External address confirmations. + address_confirmations: LruMap>, + + /// Delay to next `FIND_NODE` query. + duration_to_next_find_query: Duration, +} + +/// Legacy (fallback) Kademlia protocol name based on `protocol_id`. +fn legacy_kademlia_protocol_name(id: &ProtocolId) -> ProtocolName { + ProtocolName::from(format!("/{}/kad", id.as_ref())) +} + +/// Kademlia protocol name based on `genesis_hash` and `fork_id`. +fn kademlia_protocol_name>( + genesis_hash: Hash, + fork_id: Option<&str>, +) -> ProtocolName { + let genesis_hash_hex = bytes2hex("", genesis_hash.as_ref()); + let protocol = if let Some(fork_id) = fork_id { + format!("/{}/{}/kad", genesis_hash_hex, fork_id) + } else { + format!("/{}/kad", genesis_hash_hex) + }; + + ProtocolName::from(protocol) +} + +impl Discovery { + /// Create new [`Discovery`]. + /// + /// Enables `/ipfs/ping/1.0.0` and `/ipfs/identify/1.0.0` by default and starts + /// the mDNS peer discovery if it was enabled. + pub fn new + Clone>( + local_peer_id: litep2p::PeerId, + config: &NetworkConfiguration, + genesis_hash: Hash, + fork_id: Option<&str>, + protocol_id: &ProtocolId, + known_peers: HashMap>, + listen_addresses: Arc>>, + _peerstore_handle: Arc, + ) -> (Self, PingConfig, IdentifyConfig, KademliaConfig, Option) { + let (ping_config, ping_event_stream) = PingConfig::default(); + let user_agent = format!("{} ({}) (litep2p)", config.client_version, config.node_name); + + let (identify_config, identify_event_stream) = + IdentifyConfig::new("/substrate/1.0".to_string(), Some(user_agent)); + + let (mdns_config, mdns_event_stream) = match config.transport { + crate::config::TransportConfig::Normal { enable_mdns, .. } => match enable_mdns { + true => { + let (mdns_config, mdns_event_stream) = MdnsConfig::new(MDNS_QUERY_INTERVAL); + (Some(mdns_config), Some(mdns_event_stream)) + }, + false => (None, None), + }, + _ => panic!("memory transport not supported"), + }; + + let (kademlia_config, kademlia_handle) = { + let protocol_names = vec![ + kademlia_protocol_name(genesis_hash.clone(), fork_id), + legacy_kademlia_protocol_name(protocol_id), + ]; + + KademliaConfigBuilder::new() + .with_known_peers(known_peers) + .with_protocol_names(protocol_names) + .with_incoming_records_validation_mode(IncomingRecordValidationMode::Manual) + .build() + }; + + ( + Self { + local_peer_id, + ping_event_stream, + identify_event_stream, + mdns_event_stream, + kademlia_handle, + _peerstore_handle, + listen_addresses, + random_walk_query_id: None, + pending_events: VecDeque::new(), + duration_to_next_find_query: Duration::from_secs(1), + address_confirmations: LruMap::new(ByLength::new(MAX_EXTERNAL_ADDRESSES)), + allow_non_global_addresses: config.allow_non_globals_in_dht, + public_addresses: config.public_addresses.iter().cloned().map(Into::into).collect(), + next_kad_query: Some(Delay::new(KADEMLIA_QUERY_INTERVAL)), + local_protocols: HashSet::from_iter([kademlia_protocol_name( + genesis_hash, + fork_id, + )]), + }, + ping_config, + identify_config, + kademlia_config, + mdns_config, + ) + } + + /// Add known peer to `Kademlia`. + #[allow(unused)] + pub async fn add_known_peer(&mut self, peer: PeerId, addresses: Vec) { + self.kademlia_handle.add_known_peer(peer, addresses).await; + } + + /// Add self-reported addresses to routing table if `peer` supports + /// at least one of the locally supported DHT protocol. + pub async fn add_self_reported_address( + &mut self, + peer: PeerId, + supported_protocols: HashSet, + addresses: Vec, + ) { + if self.local_protocols.is_disjoint(&supported_protocols) { + log::trace!( + target: LOG_TARGET, + "Ignoring self-reported address of peer {peer} as remote node is not part of the \ + Kademlia DHT supported by the local node.", + ); + return + } + + let addresses = addresses + .into_iter() + .filter_map(|address| { + if !self.allow_non_global_addresses && !Discovery::can_add_to_dht(&address) { + log::trace!( + target: LOG_TARGET, + "ignoring self-reported non-global address {address} from {peer}." + ); + + return None + } + + Some(address) + }) + .collect(); + + log::trace!( + target: LOG_TARGET, + "add self-reported addresses for {peer:?}: {addresses:?}", + ); + + self.kademlia_handle.add_known_peer(peer, addresses).await; + } + + /// Start Kademlia `FIND_NODE` query for `target`. + pub async fn find_node(&mut self, target: PeerId) -> QueryId { + self.kademlia_handle.find_node(target).await + } + + /// Start Kademlia `GET_VALUE` query for `key`. + pub async fn get_value(&mut self, key: KademliaKey) -> QueryId { + self.kademlia_handle + .get_record( + RecordKey::new(&key.to_vec()), + Quorum::N(NonZeroUsize::new(GET_RECORD_REDUNDANCY_FACTOR).unwrap()), + ) + .await + } + + /// Publish value on the DHT using Kademlia `PUT_VALUE`. + pub async fn put_value(&mut self, key: KademliaKey, value: Vec) -> QueryId { + self.kademlia_handle + .put_record( + Record::new(RecordKey::new(&key.to_vec()), value), + Quorum::N(NonZeroUsize::new(PUT_RECORD_REDUNDANCY_FACTOR).unwrap()), + ) + .await + } + + /// Put record to given peers. + pub async fn put_value_to_peers( + &mut self, + record: Record, + peers: Vec, + update_local_storage: bool, + ) -> QueryId { + self.kademlia_handle + .put_record_to_peers( + record, + peers.into_iter().map(|peer| peer.into()).collect(), + update_local_storage, + Quorum::N(NonZeroUsize::new(PUT_RECORD_REDUNDANCY_FACTOR).unwrap()), + ) + .await + } + + /// Store record in the local DHT store. + pub async fn store_record( + &mut self, + key: KademliaKey, + value: Vec, + publisher: Option, + expires: Option, + ) { + log::debug!( + target: LOG_TARGET, + "Storing DHT record with key {key:?}, originally published by {publisher:?}, \ + expires {expires:?}.", + ); + + self.kademlia_handle + .store_record(Record { + key: RecordKey::new(&key.to_vec()), + value, + publisher: publisher.map(Into::into), + expires, + }) + .await; + } + + /// Start providing `key`. + pub async fn start_providing(&mut self, key: KademliaKey) { + self.kademlia_handle + .start_providing( + key.into(), + Quorum::N(NonZeroUsize::new(PUT_RECORD_REDUNDANCY_FACTOR).unwrap()), + ) + .await; + } + + /// Stop providing `key`. + pub async fn stop_providing(&mut self, key: KademliaKey) { + self.kademlia_handle.stop_providing(key.into()).await; + } + + /// Get providers for `key`. + pub async fn get_providers(&mut self, key: KademliaKey) -> QueryId { + self.kademlia_handle.get_providers(key.into()).await + } + + /// Check if the observed address is a known address. + fn is_known_address(known: &Multiaddr, observed: &Multiaddr) -> bool { + let mut known = known.iter(); + let mut observed = observed.iter(); + + loop { + match (known.next(), observed.next()) { + (None, None) => return true, + (None, Some(Protocol::P2p(_))) => return true, + (Some(Protocol::P2p(_)), None) => return true, + (known, observed) if known != observed => return false, + _ => {}, + } + } + } + + /// Can `address` be added to DHT. + fn can_add_to_dht(address: &Multiaddr) -> bool { + let ip = match address.iter().next() { + Some(Protocol::Ip4(ip)) => IpNetwork::from(ip), + Some(Protocol::Ip6(ip)) => IpNetwork::from(ip), + Some(Protocol::Dns(_)) | Some(Protocol::Dns4(_)) | Some(Protocol::Dns6(_)) => + return true, + _ => return false, + }; + + ip.is_global() + } + + /// Check if `address` can be considered a new external address. + /// + /// If this address replaces an older address, the expired address is returned. + fn is_new_external_address( + &mut self, + address: &Multiaddr, + peer: PeerId, + ) -> (bool, Option) { + log::trace!(target: LOG_TARGET, "verify new external address: {address}"); + + if !self.allow_non_global_addresses && !Discovery::can_add_to_dht(&address) { + log::trace!( + target: LOG_TARGET, + "ignoring externally reported non-global address {address} from {peer}." + ); + + return (false, None); + } + + // is the address one of our known addresses + if self + .listen_addresses + .read() + .iter() + .chain(self.public_addresses.iter()) + .any(|known_address| Discovery::is_known_address(&known_address, &address)) + { + return (true, None) + } + + match self.address_confirmations.get(address) { + Some(confirmations) => { + confirmations.insert(peer); + + if confirmations.len() >= MIN_ADDRESS_CONFIRMATIONS { + return (true, None) + } + }, + None => { + let oldest = (self.address_confirmations.len() >= + self.address_confirmations.limiter().max_length() as usize) + .then(|| { + self.address_confirmations.pop_oldest().map(|(address, peers)| { + if peers.len() >= MIN_ADDRESS_CONFIRMATIONS { + return Some(address) + } else { + None + } + }) + }) + .flatten() + .flatten(); + + self.address_confirmations.insert(address.clone(), iter::once(peer).collect()); + + return (false, oldest) + }, + } + + (false, None) + } +} + +impl Stream for Discovery { + type Item = DiscoveryEvent; + + fn poll_next(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll> { + let this = Pin::into_inner(self); + + if let Some(event) = this.pending_events.pop_front() { + return Poll::Ready(Some(event)) + } + + if let Some(mut delay) = this.next_kad_query.take() { + match delay.poll_unpin(cx) { + Poll::Pending => { + this.next_kad_query = Some(delay); + }, + Poll::Ready(()) => { + let peer = PeerId::random(); + + log::trace!(target: LOG_TARGET, "start next kademlia query for {peer:?}"); + + match this.kademlia_handle.try_find_node(peer) { + Ok(query_id) => { + this.random_walk_query_id = Some(query_id); + return Poll::Ready(Some(DiscoveryEvent::RandomKademliaStarted)) + }, + Err(()) => { + this.duration_to_next_find_query = cmp::min( + this.duration_to_next_find_query * 2, + Duration::from_secs(60), + ); + this.next_kad_query = + Some(Delay::new(this.duration_to_next_find_query)); + }, + } + }, + } + } + + match Pin::new(&mut this.kademlia_handle).poll_next(cx) { + Poll::Pending => {}, + Poll::Ready(None) => return Poll::Ready(None), + Poll::Ready(Some(KademliaEvent::FindNodeSuccess { query_id, peers, .. })) + if Some(query_id) == this.random_walk_query_id => + { + // the addresses are already inserted into the DHT and in `TransportManager` so + // there is no need to add them again. The found peers must be registered to + // `Peerstore` so other protocols are aware of them through `Peerset`. + log::trace!(target: LOG_TARGET, "dht random walk yielded {} peers", peers.len()); + + this.next_kad_query = Some(Delay::new(KADEMLIA_QUERY_INTERVAL)); + + return Poll::Ready(Some(DiscoveryEvent::RoutingTableUpdate { + peers: peers.into_iter().map(|(peer, _)| peer).collect(), + })) + }, + Poll::Ready(Some(KademliaEvent::FindNodeSuccess { query_id, target, peers })) => { + log::trace!(target: LOG_TARGET, "find node query yielded {} peers", peers.len()); + + return Poll::Ready(Some(DiscoveryEvent::FindNodeSuccess { + query_id, + target, + peers, + })) + }, + Poll::Ready(Some(KademliaEvent::RoutingTableUpdate { peers })) => { + log::trace!(target: LOG_TARGET, "routing table update, discovered {} peers", peers.len()); + + return Poll::Ready(Some(DiscoveryEvent::RoutingTableUpdate { + peers: peers.into_iter().collect(), + })) + }, + Poll::Ready(Some(KademliaEvent::GetRecordSuccess { query_id })) => { + log::trace!( + target: LOG_TARGET, + "`GET_RECORD` succeeded for {query_id:?}", + ); + + return Poll::Ready(Some(DiscoveryEvent::GetRecordSuccess { query_id })); + }, + Poll::Ready(Some(KademliaEvent::GetRecordPartialResult { query_id, record })) => { + log::trace!( + target: LOG_TARGET, + "`GET_RECORD` intermediary succeeded for {query_id:?}: {record:?}", + ); + + return Poll::Ready(Some(DiscoveryEvent::GetRecordPartialResult { + query_id, + record, + })); + }, + Poll::Ready(Some(KademliaEvent::PutRecordSuccess { query_id, key: _ })) => + return Poll::Ready(Some(DiscoveryEvent::PutRecordSuccess { query_id })), + Poll::Ready(Some(KademliaEvent::QueryFailed { query_id })) => { + match this.random_walk_query_id == Some(query_id) { + true => { + this.random_walk_query_id = None; + this.duration_to_next_find_query = + cmp::min(this.duration_to_next_find_query * 2, Duration::from_secs(60)); + this.next_kad_query = Some(Delay::new(this.duration_to_next_find_query)); + }, + false => return Poll::Ready(Some(DiscoveryEvent::QueryFailed { query_id })), + } + }, + Poll::Ready(Some(KademliaEvent::IncomingRecord { record })) => { + log::trace!( + target: LOG_TARGET, + "incoming `PUT_RECORD` request with key {:?} from publisher {:?}", + record.key, + record.publisher, + ); + + return Poll::Ready(Some(DiscoveryEvent::IncomingRecord { record })) + }, + Poll::Ready(Some(KademliaEvent::GetProvidersSuccess { + provided_key, + providers, + query_id, + })) => { + log::trace!( + target: LOG_TARGET, + "`GET_PROVIDERS` for {query_id:?} with {provided_key:?} yielded {providers:?}", + ); + + return Poll::Ready(Some(DiscoveryEvent::GetProvidersSuccess { + query_id, + providers, + })) + }, + // We do not validate incoming providers. + Poll::Ready(Some(KademliaEvent::IncomingProvider { .. })) => {}, + Poll::Ready(Some(KademliaEvent::AddProviderSuccess { query_id, provided_key })) => { + log::trace!( + target: LOG_TARGET, + "`ADD_PROVIDER` succeeded for {query_id:?}, key: {provided_key:?}", + ); + // We don't emit a specific event for this, just log it + }, + } + + match Pin::new(&mut this.identify_event_stream).poll_next(cx) { + Poll::Pending => {}, + Poll::Ready(None) => return Poll::Ready(None), + Poll::Ready(Some(IdentifyEvent::PeerIdentified { + peer, + listen_addresses, + supported_protocols, + observed_address, + .. + })) => { + let observed_address = + if let Some(Protocol::P2p(peer_id)) = observed_address.iter().last() { + if peer_id != *this.local_peer_id.as_ref() { + log::warn!( + target: LOG_TARGET, + "Discovered external address for a peer that is not us: {observed_address}", + ); + None + } else { + Some(observed_address) + } + } else { + Some(observed_address.with(Protocol::P2p(this.local_peer_id.into()))) + }; + + // Ensure that an external address with a different peer ID does not have + // side effects of evicting other external addresses via `ExternalAddressExpired`. + if let Some(observed_address) = observed_address { + let (is_new, expired_address) = + this.is_new_external_address(&observed_address, peer); + + if let Some(expired_address) = expired_address { + log::trace!( + target: LOG_TARGET, + "Removing expired external address expired={expired_address} is_new={is_new} observed={observed_address}", + ); + + this.pending_events.push_back(DiscoveryEvent::ExternalAddressExpired { + address: expired_address, + }); + } + + if is_new { + this.pending_events.push_back(DiscoveryEvent::ExternalAddressDiscovered { + address: observed_address.clone(), + }); + } + } + + return Poll::Ready(Some(DiscoveryEvent::Identified { + peer, + listen_addresses, + supported_protocols, + })); + }, + } + + match Pin::new(&mut this.ping_event_stream).poll_next(cx) { + Poll::Pending => {}, + Poll::Ready(None) => return Poll::Ready(None), + Poll::Ready(Some(PingEvent::Ping { peer, ping })) => + return Poll::Ready(Some(DiscoveryEvent::Ping { peer, rtt: ping })), + } + + if let Some(ref mut mdns_event_stream) = &mut this.mdns_event_stream { + match Pin::new(mdns_event_stream).poll_next(cx) { + Poll::Pending => {}, + Poll::Ready(None) => return Poll::Ready(None), + Poll::Ready(Some(MdnsEvent::Discovered(addresses))) => + return Poll::Ready(Some(DiscoveryEvent::Discovered { addresses })), + } + } + + Poll::Pending + } +} + +#[cfg(test)] +mod tests { + use super::*; + + use std::sync::atomic::AtomicU32; + + use crate::{ + config::ProtocolId, + peer_store::{PeerStore, PeerStoreProvider}, + }; + use futures::{stream::FuturesUnordered, StreamExt}; + use sp_core::H256; + use sp_tracing::tracing_subscriber; + + use litep2p::{ + config::ConfigBuilder as Litep2pConfigBuilder, transport::tcp::config::Config as TcpConfig, + Litep2p, + }; + + #[tokio::test] + async fn litep2p_discovery_works() { + let _ = tracing_subscriber::fmt() + .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) + .try_init(); + + let mut known_peers = HashMap::new(); + let genesis_hash = H256::from_low_u64_be(1); + let fork_id = Some("test-fork-id"); + let protocol_id = ProtocolId::from("dot"); + + // Build backends such that the first peer is known to all other peers. + let backends = (0..10) + .map(|i| { + let keypair = litep2p::crypto::ed25519::Keypair::generate(); + let peer_id: PeerId = keypair.public().to_peer_id().into(); + + let listen_addresses = Arc::new(RwLock::new(HashSet::new())); + + let peer_store = PeerStore::new(vec![], None); + let peer_store_handle: Arc = Arc::new(peer_store.handle()); + + let (discovery, ping_config, identify_config, kademlia_config, _mdns) = + Discovery::new( + peer_id, + &NetworkConfiguration::new_local(), + genesis_hash, + fork_id, + &protocol_id, + known_peers.clone(), + listen_addresses.clone(), + peer_store_handle, + ); + + let config = Litep2pConfigBuilder::new() + .with_keypair(keypair) + .with_tcp(TcpConfig { + listen_addresses: vec!["/ip6/::1/tcp/0".parse().unwrap()], + ..Default::default() + }) + .with_libp2p_ping(ping_config) + .with_libp2p_identify(identify_config) + .with_libp2p_kademlia(kademlia_config) + .build(); + + let mut litep2p = Litep2p::new(config).unwrap(); + + let addresses = litep2p.listen_addresses().cloned().collect::>(); + // Propagate addresses to discovery. + addresses.iter().for_each(|address| { + listen_addresses.write().insert(address.clone()); + }); + + // Except the first peer, all other peers know the first peer addresses. + if i == 0 { + log::info!(target: LOG_TARGET, "First peer is {peer_id:?} with addresses {addresses:?}"); + known_peers.insert(peer_id, addresses.clone()); + } else { + let (peer, addresses) = known_peers.iter().next().unwrap(); + + let result = litep2p.add_known_address(*peer, addresses.into_iter().cloned()); + + log::info!(target: LOG_TARGET, "{peer_id:?}: Adding known peer {peer:?} with addresses {addresses:?} result={result:?}"); + + } + + (peer_id, litep2p, discovery) + }) + .collect::>(); + + let total_peers = backends.len() as u32; + let remaining_peers = + backends.iter().map(|(peer_id, _, _)| *peer_id).collect::>(); + + let first_peer = *known_peers.iter().next().unwrap().0; + + // Each backend must discover the whole network. + let mut futures = FuturesUnordered::new(); + let num_finished = Arc::new(AtomicU32::new(0)); + + for (peer_id, mut litep2p, mut discovery) in backends { + // Remove the local peer id from the set. + let mut remaining_peers = remaining_peers.clone(); + remaining_peers.remove(&peer_id); + + let num_finished = num_finished.clone(); + + let future = async move { + log::info!(target: LOG_TARGET, "{peer_id:?} starting loop"); + + if peer_id != first_peer { + log::info!(target: LOG_TARGET, "{peer_id:?} dialing {first_peer:?}"); + litep2p.dial(&first_peer).await.unwrap(); + } + + loop { + // We need to keep the network alive until all peers are discovered. + if num_finished.load(std::sync::atomic::Ordering::Relaxed) == total_peers { + log::info!(target: LOG_TARGET, "{peer_id:?} all peers discovered"); + break + } + + tokio::select! { + // Drive litep2p backend forward. + event = litep2p.next_event() => { + log::info!(target: LOG_TARGET, "{peer_id:?} Litep2p event: {event:?}"); + }, + + // Detect discovery events. + event = discovery.next() => { + match event.unwrap() { + // We have discovered the peer via kademlia and established + // a connection on the identify protocol. + DiscoveryEvent::Identified { peer, .. } => { + log::info!(target: LOG_TARGET, "{peer_id:?} Peer {peer} identified"); + + remaining_peers.remove(&peer); + + if remaining_peers.is_empty() { + log::info!(target: LOG_TARGET, "{peer_id:?} All peers discovered"); + + num_finished.fetch_add(1, std::sync::atomic::Ordering::AcqRel); + } + }, + + event => { + log::info!(target: LOG_TARGET, "{peer_id:?} Discovery event: {event:?}"); + } + } + } + } + } + }; + + futures.push(future); + } + + // Futures will exit when all peers are discovered. + tokio::time::timeout(Duration::from_secs(60), futures.next()) + .await + .expect("All peers should finish within 60 seconds"); + } +} diff --git a/client/network/src/litep2p/mod.rs b/client/network/src/litep2p/mod.rs new file mode 100644 index 00000000..fe9053b6 --- /dev/null +++ b/client/network/src/litep2p/mod.rs @@ -0,0 +1,1222 @@ +// This file is part of Substrate. + +// Copyright (C) Parity Technologies (UK) Ltd. +// SPDX-License-Identifier: GPL-3.0-or-later WITH Classpath-exception-2.0 + +// This program is free software: you can redistribute it and/or modify +// it under the terms of the GNU General Public License as published by +// the Free Software Foundation, either version 3 of the License, or +// (at your option) any later version. + +// This program is distributed in the hope that it will be useful, +// but WITHOUT ANY WARRANTY; without even the implied warranty of +// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +// GNU General Public License for more details. + +// You should have received a copy of the GNU General Public License +// along with this program. If not, see . + +//! `NetworkBackend` implementation for `litep2p`. + +use crate::{ + config::{ + FullNetworkConfiguration, IncomingRequest, NodeKeyConfig, NotificationHandshake, Params, + SetConfig, TransportConfig, + }, + error::Error, + event::{DhtEvent, Event}, + litep2p::{ + discovery::{Discovery, DiscoveryEvent}, + peerstore::Peerstore, + service::{Litep2pNetworkService, NetworkServiceCommand}, + shim::{ + bitswap::BitswapServer, + notification::{ + config::{NotificationProtocolConfig, ProtocolControlHandle}, + peerset::PeersetCommand, + }, + request_response::{RequestResponseConfig, RequestResponseProtocol}, + }, + }, + peer_store::PeerStoreProvider, + service::{ + metrics::{register_without_sources, MetricSources, Metrics, NotificationMetrics}, + out_events, + traits::{BandwidthSink, NetworkBackend, NetworkService}, + }, + NetworkStatus, NotificationService, ProtocolName, +}; + +use codec::Encode; +use futures::StreamExt; +use litep2p::{ + config::ConfigBuilder, + crypto::dilithium::Keypair, + error::{DialError, NegotiationError}, + executor::Executor, + protocol::{ + libp2p::{ + bitswap::Config as BitswapConfig, + kademlia::{QueryId, Record}, + }, + request_response::ConfigBuilder as RequestResponseConfigBuilder, + }, + transport::{ + tcp::config::Config as TcpTransportConfig, + websocket::config::Config as WebSocketTransportConfig, ConnectionLimitsConfig, Endpoint, + }, + types::{ + multiaddr::{Multiaddr, Protocol}, + ConnectionId, + }, + Litep2p, Litep2pEvent, ProtocolName as Litep2pProtocolName, +}; +use prometheus_endpoint::Registry; +use sc_network_types::kad::{Key as RecordKey, PeerRecord, Record as P2PRecord}; + +use sc_client_api::BlockBackend; +use sc_network_common::{role::Roles, ExHashT}; +use sc_network_types::PeerId; +use sc_utils::mpsc::{tracing_unbounded, TracingUnboundedReceiver}; +use sp_runtime::traits::Block as BlockT; + +use std::{ + cmp, + collections::{hash_map::Entry, HashMap, HashSet}, + fs, + future::Future, + iter, + pin::Pin, + sync::{ + atomic::{AtomicUsize, Ordering}, + Arc, + }, + time::{Duration, Instant}, +}; + +mod discovery; +mod peerstore; +mod service; +mod shim; + +/// Timeout for connection waiting new substreams. +const KEEP_ALIVE_TIMEOUT: Duration = Duration::from_secs(10); + +/// Litep2p bandwidth sink. +struct Litep2pBandwidthSink { + sink: litep2p::BandwidthSink, +} + +impl BandwidthSink for Litep2pBandwidthSink { + fn total_inbound(&self) -> u64 { + self.sink.inbound() as u64 + } + + fn total_outbound(&self) -> u64 { + self.sink.outbound() as u64 + } +} + +/// Litep2p task executor. +struct Litep2pExecutor { + /// Executor. + executor: Box + Send>>) + Send + Sync>, +} + +impl Executor for Litep2pExecutor { + fn run(&self, future: Pin + Send>>) { + (self.executor)(future) + } + + fn run_with_name(&self, _: &'static str, future: Pin + Send>>) { + (self.executor)(future) + } +} + +/// Logging target for the file. +const LOG_TARGET: &str = "sub-libp2p"; + +/// Peer context. +struct ConnectionContext { + /// Peer endpoints. + endpoints: HashMap, + + /// Number of active connections. + num_connections: usize, +} + +/// Kademlia query we are tracking. +#[derive(Debug)] +enum KadQuery { + /// `FIND_NODE` query for target and when it was initiated. + FindNode(PeerId, Instant), + /// `GET_VALUE` query for key and when it was initiated. + GetValue(RecordKey, Instant), + /// `PUT_VALUE` query for key and when it was initiated. + PutValue(RecordKey, Instant), + /// `GET_PROVIDERS` query for key and when it was initiated. + GetProviders(RecordKey, Instant), +} + +/// Networking backend for `litep2p`. +pub struct Litep2pNetworkBackend { + /// Main `litep2p` object. + litep2p: Litep2p, + + /// `NetworkService` implementation for `Litep2pNetworkBackend`. + network_service: Arc, + + /// RX channel for receiving commands from `Litep2pNetworkService`. + cmd_rx: TracingUnboundedReceiver, + + /// `Peerset` handles to notification protocols. + peerset_handles: HashMap, + + /// Pending Kademlia queries. + pending_queries: HashMap, + + /// Discovery. + discovery: Discovery, + + /// Number of connected peers. + num_connected: Arc, + + /// Connected peers. + peers: HashMap, + + /// Peerstore. + peerstore_handle: Arc, + + /// Block announce protocol name. + block_announce_protocol: ProtocolName, + + /// Sender for DHT events. + event_streams: out_events::OutChannels, + + /// Prometheus metrics. + metrics: Option, +} + +impl Litep2pNetworkBackend { + /// From an iterator of multiaddress(es), parse and group all addresses of peers + /// so that litep2p can consume the information easily. + fn parse_addresses( + addresses: impl Iterator, + ) -> HashMap> { + addresses + .into_iter() + .filter_map(|address| match address.iter().next() { + Some( + Protocol::Dns(_) | + Protocol::Dns4(_) | + Protocol::Dns6(_) | + Protocol::Ip6(_) | + Protocol::Ip4(_), + ) => match address.iter().find(|protocol| std::matches!(protocol, Protocol::P2p(_))) + { + Some(Protocol::P2p(multihash)) => PeerId::from_multihash(multihash.into()) + .map_or(None, |peer| Some((peer, Some(address)))), + _ => None, + }, + Some(Protocol::P2p(multihash)) => + PeerId::from_multihash(multihash.into()).map_or(None, |peer| Some((peer, None))), + _ => None, + }) + .fold(HashMap::new(), |mut acc, (peer, maybe_address)| { + let entry = acc.entry(peer).or_default(); + maybe_address.map(|address| entry.push(address)); + + acc + }) + } + + /// Add new known addresses to `litep2p` and return the parsed peer IDs. + fn add_addresses(&mut self, peers: impl Iterator) -> HashSet { + Self::parse_addresses(peers.into_iter()) + .into_iter() + .filter_map(|(peer, addresses)| { + // `peers` contained multiaddress in the form `/p2p/` + if addresses.is_empty() { + return Some(peer) + } + + if self.litep2p.add_known_address(peer.into(), addresses.clone().into_iter()) == 0 { + log::warn!( + target: LOG_TARGET, + "couldn't add any addresses for {peer:?} and it won't be added as reserved peer", + ); + return None + } + + self.peerstore_handle.add_known_peer(peer); + Some(peer) + }) + .collect() + } +} + +impl Litep2pNetworkBackend { + /// Get `litep2p` keypair from `NodeKeyConfig`. + fn get_keypair(node_key: &NodeKeyConfig) -> Result<(Keypair, litep2p::PeerId), Error> { + let local_identity = node_key.clone().into_litep2p_keypair()?; + let local_public = local_identity.public(); + let local_peer_id = local_public.to_peer_id(); + + Ok((local_identity, local_peer_id)) + } + + /// Configure transport protocols for `Litep2pNetworkBackend`. + fn configure_transport( + config: &FullNetworkConfiguration, + ) -> ConfigBuilder { + let _ = match config.network_config.transport { + TransportConfig::MemoryOnly => panic!("memory transport not supported"), + TransportConfig::Normal { .. } => false, + }; + let config_builder = ConfigBuilder::new(); + + let (tcp, websocket): (Vec>, Vec>) = config + .network_config + .listen_addresses + .iter() + .filter_map(|address| { + use sc_network_types::multiaddr::Protocol; + + let mut iter = address.iter(); + + match iter.next() { + Some(Protocol::Ip4(_) | Protocol::Ip6(_)) => {}, + protocol => { + log::error!( + target: LOG_TARGET, + "unknown protocol {protocol:?}, ignoring {address:?}", + ); + + return None + }, + } + + match iter.next() { + Some(Protocol::Tcp(_)) => match iter.next() { + Some(Protocol::Ws(_) | Protocol::Wss(_)) => + Some((None, Some(address.clone()))), + Some(Protocol::P2p(_)) | None => Some((Some(address.clone()), None)), + protocol => { + log::error!( + target: LOG_TARGET, + "unknown protocol {protocol:?}, ignoring {address:?}", + ); + None + }, + }, + protocol => { + log::error!( + target: LOG_TARGET, + "unknown protocol {protocol:?}, ignoring {address:?}", + ); + None + }, + } + }) + .unzip(); + + config_builder + .with_websocket(WebSocketTransportConfig { + listen_addresses: websocket.into_iter().flatten().map(Into::into).collect(), + yamux_config: litep2p::yamux::Config::default(), + nodelay: true, + ..Default::default() + }) + .with_tcp(TcpTransportConfig { + listen_addresses: tcp.into_iter().flatten().map(Into::into).collect(), + yamux_config: litep2p::yamux::Config::default(), + nodelay: true, + ..Default::default() + }) + } +} + +#[async_trait::async_trait] +impl NetworkBackend for Litep2pNetworkBackend { + type NotificationProtocolConfig = NotificationProtocolConfig; + type RequestResponseProtocolConfig = RequestResponseConfig; + type NetworkService = Arc; + type PeerStore = Peerstore; + type BitswapConfig = BitswapConfig; + + fn new(mut params: Params) -> Result + where + Self: Sized, + { + let (keypair, local_peer_id) = + Self::get_keypair(¶ms.network_config.network_config.node_key)?; + let (cmd_tx, cmd_rx) = tracing_unbounded("mpsc_network_worker", 100_000); + + params.network_config.network_config.boot_nodes = params + .network_config + .network_config + .boot_nodes + .into_iter() + .filter(|boot_node| boot_node.peer_id != local_peer_id.into()) + .collect(); + params.network_config.network_config.default_peers_set.reserved_nodes = params + .network_config + .network_config + .default_peers_set + .reserved_nodes + .into_iter() + .filter(|reserved_node| { + if reserved_node.peer_id == local_peer_id.into() { + log::warn!( + target: LOG_TARGET, + "Local peer ID used in reserved node, ignoring: {reserved_node}", + ); + false + } else { + true + } + }) + .collect(); + + if let Some(path) = ¶ms.network_config.network_config.net_config_path { + fs::create_dir_all(path)?; + } + + log::info!(target: LOG_TARGET, "Local node identity is: {local_peer_id}"); + log::info!(target: LOG_TARGET, "Running litep2p network backend"); + + params.network_config.sanity_check_addresses()?; + params.network_config.sanity_check_bootnodes()?; + + let mut config_builder = + Self::configure_transport(¶ms.network_config).with_keypair(keypair.clone()); + let known_addresses = params.network_config.known_addresses(); + let peer_store_handle = params.network_config.peer_store_handle(); + let executor = Arc::new(Litep2pExecutor { executor: params.executor }); + + let FullNetworkConfiguration { + notification_protocols, + request_response_protocols, + network_config, + .. + } = params.network_config; + + // initialize notification protocols + // + // pass the protocol configuration to `Litep2pConfigBuilder` and save the TX channel + // to the protocol's `Peerset` together with the protocol name to allow other subsystems + // of Polkadot SDK to control connectivity of the notification protocol + let block_announce_protocol = params.block_announce_config.protocol_name().clone(); + let mut notif_protocols = HashMap::from_iter([( + params.block_announce_config.protocol_name().clone(), + params.block_announce_config.handle, + )]); + + // handshake for all but the syncing protocol is set to node role + config_builder = notification_protocols + .into_iter() + .fold(config_builder, |config_builder, mut config| { + config.config.set_handshake(Roles::from(¶ms.role).encode()); + notif_protocols.insert(config.protocol_name, config.handle); + + config_builder.with_notification_protocol(config.config) + }) + .with_notification_protocol(params.block_announce_config.config); + + // initialize request-response protocols + let metrics = match ¶ms.metrics_registry { + Some(registry) => Some(register_without_sources(registry)?), + None => None, + }; + + // create channels that are used to send request before initializing protocols so the + // senders can be passed onto all request-response protocols + // + // all protocols must have each others' senders so they can send the fallback request in + // case the main protocol is not supported by the remote peer and user specified a fallback + let (mut request_response_receivers, request_response_senders): ( + HashMap<_, _>, + HashMap<_, _>, + ) = request_response_protocols + .iter() + .map(|config| { + let (tx, rx) = tracing_unbounded("outbound-requests", 10_000); + ((config.protocol_name.clone(), rx), (config.protocol_name.clone(), tx)) + }) + .unzip(); + + config_builder = request_response_protocols.into_iter().fold( + config_builder, + |config_builder, config| { + let (protocol_config, handle) = RequestResponseConfigBuilder::new( + Litep2pProtocolName::from(config.protocol_name.clone()), + ) + .with_max_size(cmp::max(config.max_request_size, config.max_response_size) as usize) + .with_fallback_names(config.fallback_names.into_iter().map(From::from).collect()) + .with_timeout(config.request_timeout) + .build(); + + let protocol = RequestResponseProtocol::new( + config.protocol_name.clone(), + handle, + Arc::clone(&peer_store_handle), + config.inbound_queue, + request_response_receivers + .remove(&config.protocol_name) + .expect("receiver exists as it was just added and there are no duplicate protocols; qed"), + request_response_senders.clone(), + metrics.clone(), + ); + + executor.run(Box::pin(async move { + protocol.run().await; + })); + + config_builder.with_request_response_protocol(protocol_config) + }, + ); + + // collect known addresses + let known_addresses: HashMap> = + known_addresses.into_iter().fold(HashMap::new(), |mut acc, (peer, address)| { + use sc_network_types::multiaddr::Protocol; + + let address = match address.iter().last() { + Some(Protocol::Ws(_) | Protocol::Wss(_) | Protocol::Tcp(_)) => + address.with(Protocol::P2p(peer.into())), + Some(Protocol::P2p(_)) => address, + _ => return acc, + }; + + acc.entry(peer.into()).or_default().push(address.into()); + peer_store_handle.add_known_peer(peer); + + acc + }); + + // enable ipfs ping, identify and kademlia, and potentially mdns if user enabled it + let listen_addresses = Arc::new(Default::default()); + let (discovery, ping_config, identify_config, kademlia_config, maybe_mdns_config) = + Discovery::new( + local_peer_id, + &network_config, + params.genesis_hash, + params.fork_id.as_deref(), + ¶ms.protocol_id, + known_addresses.clone(), + Arc::clone(&listen_addresses), + Arc::clone(&peer_store_handle), + ); + + config_builder = config_builder + .with_known_addresses(known_addresses.clone().into_iter()) + .with_libp2p_ping(ping_config) + .with_libp2p_identify(identify_config) + .with_libp2p_kademlia(kademlia_config) + .with_connection_limits(ConnectionLimitsConfig::default().max_incoming_connections( + Some(crate::MAX_CONNECTIONS_ESTABLISHED_INCOMING as usize), + )) + // This has the same effect as `libp2p::Swarm::with_idle_connection_timeout` which is + // set to 10 seconds as well. + .with_keep_alive_timeout(KEEP_ALIVE_TIMEOUT) + .with_executor(executor); + + if let Some(config) = maybe_mdns_config { + config_builder = config_builder.with_mdns(config); + } + + if let Some(config) = params.bitswap_config { + config_builder = config_builder.with_libp2p_bitswap(config); + } + + let litep2p = + Litep2p::new(config_builder.build()).map_err(|error| Error::Litep2p(error))?; + + litep2p.listen_addresses().for_each(|address| { + log::debug!(target: LOG_TARGET, "listening on: {address}"); + + listen_addresses.write().insert(address.clone()); + }); + + let public_addresses = litep2p.public_addresses(); + for address in network_config.public_addresses.iter() { + if let Err(err) = public_addresses.add_address(address.clone().into()) { + log::warn!( + target: LOG_TARGET, + "failed to add public address {address:?}: {err:?}", + ); + } + } + + let network_service = Arc::new(Litep2pNetworkService::new( + local_peer_id, + keypair.clone(), + cmd_tx, + Arc::clone(&peer_store_handle), + notif_protocols.clone(), + block_announce_protocol.clone(), + request_response_senders, + Arc::clone(&listen_addresses), + public_addresses, + )); + + // register rest of the metrics now that `Litep2p` has been created + let num_connected = Arc::new(Default::default()); + let bandwidth: Arc = + Arc::new(Litep2pBandwidthSink { sink: litep2p.bandwidth_sink() }); + + if let Some(registry) = ¶ms.metrics_registry { + MetricSources::register(registry, bandwidth, Arc::clone(&num_connected))?; + } + + Ok(Self { + network_service, + cmd_rx, + metrics, + peerset_handles: notif_protocols, + num_connected, + discovery, + pending_queries: HashMap::new(), + peerstore_handle: peer_store_handle, + block_announce_protocol, + event_streams: out_events::OutChannels::new(None)?, + peers: HashMap::new(), + litep2p, + }) + } + + fn network_service(&self) -> Arc { + Arc::clone(&self.network_service) + } + + fn peer_store( + bootnodes: Vec, + metrics_registry: Option, + ) -> Self::PeerStore { + Peerstore::new(bootnodes, metrics_registry) + } + + fn register_notification_metrics(registry: Option<&Registry>) -> NotificationMetrics { + NotificationMetrics::new(registry) + } + + /// Create Bitswap server. + fn bitswap_server( + client: Arc + Send + Sync>, + ) -> (Pin + Send>>, Self::BitswapConfig) { + BitswapServer::new(client) + } + + /// Create notification protocol configuration for `protocol`. + fn notification_config( + protocol_name: ProtocolName, + fallback_names: Vec, + max_notification_size: u64, + handshake: Option, + set_config: SetConfig, + metrics: NotificationMetrics, + peerstore_handle: Arc, + ) -> (Self::NotificationProtocolConfig, Box) { + Self::NotificationProtocolConfig::new( + protocol_name, + fallback_names, + max_notification_size as usize, + handshake, + set_config, + metrics, + peerstore_handle, + ) + } + + /// Create request-response protocol configuration. + fn request_response_config( + protocol_name: ProtocolName, + fallback_names: Vec, + max_request_size: u64, + max_response_size: u64, + request_timeout: Duration, + inbound_queue: Option>, + ) -> Self::RequestResponseProtocolConfig { + Self::RequestResponseProtocolConfig::new( + protocol_name, + fallback_names, + max_request_size, + max_response_size, + request_timeout, + inbound_queue, + ) + } + + /// Start [`Litep2pNetworkBackend`] event loop. + async fn run(mut self) { + log::debug!(target: LOG_TARGET, "starting litep2p network backend"); + + loop { + let num_connected_peers = self + .peerset_handles + .get(&self.block_announce_protocol) + .map_or(0usize, |handle| handle.connected_peers.load(Ordering::Relaxed)); + self.num_connected.store(num_connected_peers, Ordering::Relaxed); + + tokio::select! { + command = self.cmd_rx.next() => match command { + None => return, + Some(command) => match command { + NetworkServiceCommand::FindClosestPeers { target } => { + let query_id = self.discovery.find_node(target.into()).await; + self.pending_queries.insert(query_id, KadQuery::FindNode(target, Instant::now())); + } + NetworkServiceCommand::GetValue{ key } => { + let query_id = self.discovery.get_value(key.clone()).await; + self.pending_queries.insert(query_id, KadQuery::GetValue(key, Instant::now())); + } + NetworkServiceCommand::PutValue { key, value } => { + let query_id = self.discovery.put_value(key.clone(), value).await; + self.pending_queries.insert(query_id, KadQuery::PutValue(key, Instant::now())); + } + NetworkServiceCommand::PutValueTo { record, peers, update_local_storage} => { + let kademlia_key = record.key.clone(); + let query_id = self.discovery.put_value_to_peers(record.into(), peers, update_local_storage).await; + self.pending_queries.insert(query_id, KadQuery::PutValue(kademlia_key, Instant::now())); + } + NetworkServiceCommand::StoreRecord { key, value, publisher, expires } => { + self.discovery.store_record(key, value, publisher.map(Into::into), expires).await; + } + NetworkServiceCommand::StartProviding { key } => { + self.discovery.start_providing(key).await; + } + NetworkServiceCommand::StopProviding { key } => { + self.discovery.stop_providing(key).await; + } + NetworkServiceCommand::GetProviders { key } => { + let query_id = self.discovery.get_providers(key.clone()).await; + self.pending_queries.insert(query_id, KadQuery::GetProviders(key, Instant::now())); + } + NetworkServiceCommand::EventStream { tx } => { + self.event_streams.push(tx); + } + NetworkServiceCommand::Status { tx } => { + let _ = tx.send(NetworkStatus { + num_connected_peers: self + .peerset_handles + .get(&self.block_announce_protocol) + .map_or(0usize, |handle| handle.connected_peers.load(Ordering::Relaxed)), + total_bytes_inbound: self.litep2p.bandwidth_sink().inbound() as u64, + total_bytes_outbound: self.litep2p.bandwidth_sink().outbound() as u64, + }); + } + NetworkServiceCommand::AddPeersToReservedSet { + protocol, + peers, + } => { + let peers = self.add_addresses(peers.into_iter().map(Into::into)); + + match self.peerset_handles.get(&protocol) { + Some(handle) => { + let _ = handle.tx.unbounded_send(PeersetCommand::AddReservedPeers { peers }); + } + None => log::warn!(target: LOG_TARGET, "protocol {protocol} doens't exist"), + }; + } + NetworkServiceCommand::AddKnownAddress { peer, address } => { + let mut address: Multiaddr = address.into(); + + if !address.iter().any(|protocol| std::matches!(protocol, Protocol::P2p(_))) { + address.push(Protocol::P2p(litep2p::PeerId::from(peer).into())); + } + + if self.litep2p.add_known_address(peer.into(), iter::once(address.clone())) > 0 { + // libp2p backend generates `DiscoveryOut::Discovered(peer_id)` + // event when a new address is added for a peer, which leads to the + // peer being added to peerstore. Do the same directly here. + self.peerstore_handle.add_known_peer(peer); + } else { + log::debug!( + target: LOG_TARGET, + "couldn't add known address ({address}) for {peer:?}, unsupported transport" + ); + } + }, + NetworkServiceCommand::SetReservedPeers { protocol, peers } => { + let peers = self.add_addresses(peers.into_iter().map(Into::into)); + + match self.peerset_handles.get(&protocol) { + Some(handle) => { + let _ = handle.tx.unbounded_send(PeersetCommand::SetReservedPeers { peers }); + } + None => log::warn!(target: LOG_TARGET, "protocol {protocol} doens't exist"), + } + + }, + NetworkServiceCommand::DisconnectPeer { + protocol, + peer, + } => { + let Some(handle) = self.peerset_handles.get(&protocol) else { + log::warn!(target: LOG_TARGET, "protocol {protocol} doens't exist"); + continue + }; + + let _ = handle.tx.unbounded_send(PeersetCommand::DisconnectPeer { peer }); + } + NetworkServiceCommand::SetReservedOnly { + protocol, + reserved_only, + } => { + let Some(handle) = self.peerset_handles.get(&protocol) else { + log::warn!(target: LOG_TARGET, "protocol {protocol} doens't exist"); + continue + }; + + let _ = handle.tx.unbounded_send(PeersetCommand::SetReservedOnly { reserved_only }); + } + NetworkServiceCommand::RemoveReservedPeers { + protocol, + peers, + } => { + let Some(handle) = self.peerset_handles.get(&protocol) else { + log::warn!(target: LOG_TARGET, "protocol {protocol} doens't exist"); + continue + }; + + let _ = handle.tx.unbounded_send(PeersetCommand::RemoveReservedPeers { peers }); + } + } + }, + event = self.discovery.next() => match event { + None => return, + Some(DiscoveryEvent::Discovered { addresses }) => { + // if at least one address was added for the peer, report the peer to `Peerstore` + for (peer, addresses) in Litep2pNetworkBackend::parse_addresses(addresses.into_iter()) { + if self.litep2p.add_known_address(peer.into(), addresses.clone().into_iter()) > 0 { + self.peerstore_handle.add_known_peer(peer); + } + } + } + Some(DiscoveryEvent::RoutingTableUpdate { peers }) => { + for peer in peers { + self.peerstore_handle.add_known_peer(peer.into()); + } + } + Some(DiscoveryEvent::FindNodeSuccess { query_id, target, peers }) => { + match self.pending_queries.remove(&query_id) { + Some(KadQuery::FindNode(_, started)) => { + log::trace!( + target: LOG_TARGET, + "`FIND_NODE` for {target:?} ({query_id:?}) succeeded", + ); + + self.event_streams.send( + Event::Dht( + DhtEvent::ClosestPeersFound( + target.into(), + peers + .into_iter() + .map(|(peer, addrs)| ( + peer.into(), + addrs.into_iter().map(Into::into).collect(), + )) + .collect(), + ) + ) + ); + + if let Some(ref metrics) = self.metrics { + metrics + .kademlia_query_duration + .with_label_values(&["node-find"]) + .observe(started.elapsed().as_secs_f64()); + } + }, + query => { + log::error!( + target: LOG_TARGET, + "Missing/invalid pending query for `FIND_NODE`: {query:?}" + ); + debug_assert!(false); + } + } + }, + Some(DiscoveryEvent::GetRecordPartialResult { query_id, record }) => { + if !self.pending_queries.contains_key(&query_id) { + log::error!( + target: LOG_TARGET, + "Missing/invalid pending query for `GET_VALUE` partial result: {query_id:?}" + ); + + continue + } + + let peer_id: sc_network_types::PeerId = record.peer.into(); + let record = PeerRecord { + record: P2PRecord { + key: record.record.key.to_vec().into(), + value: record.record.value, + publisher: record.record.publisher.map(|peer_id| { + let peer_id: sc_network_types::PeerId = peer_id.into(); + peer_id.into() + }), + expires: record.record.expires, + }, + peer: Some(peer_id.into()), + }; + + self.event_streams.send( + Event::Dht( + DhtEvent::ValueFound( + record.into() + ) + ) + ); + } + Some(DiscoveryEvent::GetRecordSuccess { query_id }) => { + match self.pending_queries.remove(&query_id) { + Some(KadQuery::GetValue(key, started)) => { + log::trace!( + target: LOG_TARGET, + "`GET_VALUE` for {key:?} ({query_id:?}) succeeded", + ); + + if let Some(ref metrics) = self.metrics { + metrics + .kademlia_query_duration + .with_label_values(&["value-get"]) + .observe(started.elapsed().as_secs_f64()); + } + }, + query => { + log::error!( + target: LOG_TARGET, + "Missing/invalid pending query for `GET_VALUE`: {query:?}" + ); + debug_assert!(false); + }, + } + } + Some(DiscoveryEvent::PutRecordSuccess { query_id }) => { + match self.pending_queries.remove(&query_id) { + Some(KadQuery::PutValue(key, started)) => { + log::trace!( + target: LOG_TARGET, + "`PUT_VALUE` for {key:?} ({query_id:?}) succeeded", + ); + + self.event_streams.send(Event::Dht( + DhtEvent::ValuePut(key) + )); + + if let Some(ref metrics) = self.metrics { + metrics + .kademlia_query_duration + .with_label_values(&["value-put"]) + .observe(started.elapsed().as_secs_f64()); + } + }, + query => { + log::error!( + target: LOG_TARGET, + "Missing/invalid pending query for `PUT_VALUE`: {query:?}" + ); + debug_assert!(false); + } + } + } + Some(DiscoveryEvent::GetProvidersSuccess { query_id, providers }) => { + match self.pending_queries.remove(&query_id) { + Some(KadQuery::GetProviders(key, started)) => { + log::trace!( + target: LOG_TARGET, + "`GET_PROVIDERS` for {key:?} ({query_id:?}) succeeded", + ); + + // We likely requested providers to connect to them, + // so let's add their addresses to litep2p's transport manager. + // Consider also looking the addresses of providers up with `FIND_NODE` + // query, as it can yield more up to date addresses. + providers.iter().for_each(|p| { + self.litep2p.add_known_address(p.peer, p.addresses.clone().into_iter()); + }); + + self.event_streams.send(Event::Dht( + DhtEvent::ProvidersFound( + key.clone().into(), + providers.into_iter().map(|p| p.peer.into()).collect() + ) + )); + + // litep2p returns all providers in a single event, so we let + // subscribers know no more providers will be yielded. + self.event_streams.send(Event::Dht( + DhtEvent::NoMoreProviders(key.into()) + )); + + if let Some(ref metrics) = self.metrics { + metrics + .kademlia_query_duration + .with_label_values(&["providers-get"]) + .observe(started.elapsed().as_secs_f64()); + } + }, + query => { + log::error!( + target: LOG_TARGET, + "Missing/invalid pending query for `GET_PROVIDERS`: {query:?}" + ); + debug_assert!(false); + } + } + } + Some(DiscoveryEvent::QueryFailed { query_id }) => { + match self.pending_queries.remove(&query_id) { + Some(KadQuery::FindNode(peer_id, started)) => { + log::debug!( + target: LOG_TARGET, + "`FIND_NODE` ({query_id:?}) failed for target {peer_id:?}", + ); + + self.event_streams.send(Event::Dht( + DhtEvent::ClosestPeersNotFound(peer_id.into()) + )); + + if let Some(ref metrics) = self.metrics { + metrics + .kademlia_query_duration + .with_label_values(&["node-find-failed"]) + .observe(started.elapsed().as_secs_f64()); + } + }, + Some(KadQuery::GetValue(key, started)) => { + log::debug!( + target: LOG_TARGET, + "`GET_VALUE` ({query_id:?}) failed for key {key:?}", + ); + + self.event_streams.send(Event::Dht( + DhtEvent::ValueNotFound(key) + )); + + if let Some(ref metrics) = self.metrics { + metrics + .kademlia_query_duration + .with_label_values(&["value-get-failed"]) + .observe(started.elapsed().as_secs_f64()); + } + }, + Some(KadQuery::PutValue(key, started)) => { + log::debug!( + target: LOG_TARGET, + "`PUT_VALUE` ({query_id:?}) failed for key {key:?}", + ); + + self.event_streams.send(Event::Dht( + DhtEvent::ValuePutFailed(key) + )); + + if let Some(ref metrics) = self.metrics { + metrics + .kademlia_query_duration + .with_label_values(&["value-put-failed"]) + .observe(started.elapsed().as_secs_f64()); + } + }, + Some(KadQuery::GetProviders(key, started)) => { + log::debug!( + target: LOG_TARGET, + "`GET_PROVIDERS` ({query_id:?}) failed for key {key:?}" + ); + + self.event_streams.send(Event::Dht( + DhtEvent::ProvidersNotFound(key) + )); + + if let Some(ref metrics) = self.metrics { + metrics + .kademlia_query_duration + .with_label_values(&["providers-get-failed"]) + .observe(started.elapsed().as_secs_f64()); + } + }, + None => { + log::warn!( + target: LOG_TARGET, + "non-existent query failed ({query_id:?})", + ); + } + } + } + Some(DiscoveryEvent::Identified { peer, listen_addresses, supported_protocols, .. }) => { + self.discovery.add_self_reported_address(peer, supported_protocols, listen_addresses).await; + } + Some(DiscoveryEvent::ExternalAddressDiscovered { address }) => { + match self.litep2p.public_addresses().add_address(address.clone().into()) { + Ok(inserted) => if inserted { + log::info!(target: LOG_TARGET, "🔍 Discovered new external address for our node: {address}"); + }, + Err(err) => { + log::warn!( + target: LOG_TARGET, + "🔍 Failed to add discovered external address {address:?}: {err:?}", + ); + }, + } + } + Some(DiscoveryEvent::ExternalAddressExpired{ address }) => { + let local_peer_id = self.litep2p.local_peer_id(); + + // Litep2p requires the peer ID to be present in the address. + let address = if !std::matches!(address.iter().last(), Some(Protocol::P2p(_))) { + address.with(Protocol::P2p(*local_peer_id.as_ref())) + } else { + address + }; + + if self.litep2p.public_addresses().remove_address(&address) { + log::info!(target: LOG_TARGET, "🔍 Expired external address for our node: {address}"); + } else { + log::warn!( + target: LOG_TARGET, + "🔍 Failed to remove expired external address {address:?}" + ); + } + } + Some(DiscoveryEvent::Ping { peer, rtt }) => { + log::trace!( + target: LOG_TARGET, + "ping time with {peer:?}: {rtt:?}", + ); + } + Some(DiscoveryEvent::IncomingRecord { record: Record { key, value, publisher, expires }} ) => { + self.event_streams.send(Event::Dht( + DhtEvent::PutRecordRequest( + key.into(), + value, + publisher.map(Into::into), + expires, + ) + )); + }, + + Some(DiscoveryEvent::RandomKademliaStarted) => { + if let Some(metrics) = self.metrics.as_ref() { + metrics.kademlia_random_queries_total.inc(); + } + } + }, + event = self.litep2p.next_event() => match event { + Some(Litep2pEvent::ConnectionEstablished { peer, endpoint }) => { + let Some(metrics) = &self.metrics else { + continue; + }; + + let direction = match endpoint { + Endpoint::Dialer { .. } => "out", + Endpoint::Listener { .. } => { + // Increment incoming connections counter. + // + // Note: For litep2p these are represented by established negotiated connections, + // while for libp2p (legacy) these represent not-yet-negotiated connections. + metrics.incoming_connections_total.inc(); + + "in" + }, + }; + metrics.connections_opened_total.with_label_values(&[direction]).inc(); + + match self.peers.entry(peer) { + Entry::Vacant(entry) => { + entry.insert(ConnectionContext { + endpoints: HashMap::from_iter([(endpoint.connection_id(), endpoint)]), + num_connections: 1usize, + }); + metrics.distinct_peers_connections_opened_total.inc(); + } + Entry::Occupied(entry) => { + let entry = entry.into_mut(); + entry.num_connections += 1; + entry.endpoints.insert(endpoint.connection_id(), endpoint); + } + } + } + Some(Litep2pEvent::ConnectionClosed { peer, connection_id }) => { + let Some(metrics) = &self.metrics else { + continue; + }; + + let Some(context) = self.peers.get_mut(&peer) else { + log::debug!(target: LOG_TARGET, "unknown peer disconnected: {peer:?} ({connection_id:?})"); + continue + }; + + let direction = match context.endpoints.remove(&connection_id) { + None => { + log::debug!(target: LOG_TARGET, "connection {connection_id:?} doesn't exist for {peer:?} "); + continue + } + Some(endpoint) => { + context.num_connections -= 1; + + match endpoint { + Endpoint::Dialer { .. } => "out", + Endpoint::Listener { .. } => "in", + } + } + }; + + metrics.connections_closed_total.with_label_values(&[direction, "actively-closed"]).inc(); + + if context.num_connections == 0 { + self.peers.remove(&peer); + metrics.distinct_peers_connections_closed_total.inc(); + } + } + Some(Litep2pEvent::DialFailure { address, error }) => { + log::debug!( + target: LOG_TARGET, + "failed to dial peer at {address:?}: {error:?}", + ); + + if let Some(metrics) = &self.metrics { + let reason = match error { + DialError::Timeout => "timeout", + DialError::AddressError(_) => "invalid-address", + DialError::DnsError(_) => "cannot-resolve-dns", + DialError::NegotiationError(error) => match error { + NegotiationError::Timeout => "timeout", + NegotiationError::PeerIdMissing => "missing-peer-id", + NegotiationError::StateMismatch => "state-mismatch", + NegotiationError::PeerIdMismatch(_,_) => "peer-id-missmatch", + NegotiationError::MultistreamSelectError(_) => "multistream-select-error", + NegotiationError::SnowError(_) => "noise-error", + NegotiationError::ParseError(_) => "parse-error", + NegotiationError::IoError(_) => "io-error", + NegotiationError::WebSocket(_) => "webscoket-error", + NegotiationError::BadSignature => "bad-signature", + NegotiationError::Quic(_) => "quic-error", + } + }; + + metrics.pending_connections_errors_total.with_label_values(&[&reason]).inc(); + } + } + Some(Litep2pEvent::ListDialFailures { errors }) => { + log::debug!( + target: LOG_TARGET, + "failed to dial peer on multiple addresses {errors:?}", + ); + + if let Some(metrics) = &self.metrics { + metrics.pending_connections_errors_total.with_label_values(&["transport-errors"]).inc(); + } + } + None => { + log::error!( + target: LOG_TARGET, + "Litep2p backend terminated" + ); + return + } + }, + } + } + } +} diff --git a/client/network/src/litep2p/peerstore.rs b/client/network/src/litep2p/peerstore.rs new file mode 100644 index 00000000..dd8d92bc --- /dev/null +++ b/client/network/src/litep2p/peerstore.rs @@ -0,0 +1,481 @@ +// This file is part of Substrate. + +// Copyright (C) Parity Technologies (UK) Ltd. +// SPDX-License-Identifier: GPL-3.0-or-later WITH Classpath-exception-2.0 + +// This program is free software: you can redistribute it and/or modify +// it under the terms of the GNU General Public License as published by +// the Free Software Foundation, either version 3 of the License, or +// (at your option) any later version. + +// This program is distributed in the hope that it will be useful, +// but WITHOUT ANY WARRANTY; without even the implied warranty of +// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +// GNU General Public License for more details. + +// You should have received a copy of the GNU General Public License +// along with this program. If not, see . + +//! `Peerstore` implementation for `litep2p`. +//! +//! `Peerstore` is responsible for storing information about remote peers +//! such as their addresses, reputations, supported protocols etc. + +use crate::{ + peer_store::{PeerStoreProvider, ProtocolHandle}, + service::{metrics::PeerStoreMetrics, traits::PeerStore}, + ObservedRole, ReputationChange, +}; + +use parking_lot::Mutex; +use prometheus_endpoint::Registry; +use wasm_timer::Delay; + +use sc_network_types::PeerId; + +use std::{ + collections::{HashMap, HashSet}, + sync::Arc, + time::{Duration, Instant}, +}; + +/// Logging target for the file. +const LOG_TARGET: &str = "sub-libp2p::peerstore"; + +/// We don't accept nodes whose reputation is under this value. +pub const BANNED_THRESHOLD: i32 = 71 * (i32::MIN / 100); + +/// Relative decrement of a reputation value that is applied every second. I.e., for inverse +/// decrement of 200 we decrease absolute value of the reputation by 1/200. +/// +/// This corresponds to a factor of `k = 0.995`, where k = 1 - 1 / INVERSE_DECREMENT. +/// +/// It takes ~ `ln(0.5) / ln(k)` seconds to reduce the reputation by half, or 138.63 seconds for the +/// values above. +/// +/// In this setup: +/// - `i32::MAX` becomes 0 in exactly 3544 seconds, or approximately 59 minutes +/// - `i32::MIN` escapes the banned threshold in 69 seconds +const INVERSE_DECREMENT: i32 = 200; + +/// Amount of time between the moment we last updated the [`PeerStore`] entry and the moment we +/// remove it, once the reputation value reaches 0. +const FORGET_AFTER: Duration = Duration::from_secs(3600); + +/// Peer information. +#[derive(Debug, Clone, Copy)] +struct PeerInfo { + /// Reputation of the peer. + reputation: i32, + + /// Instant when the peer was last updated. + last_updated: Instant, + + /// Role of the peer, if known. + role: Option, +} + +impl Default for PeerInfo { + fn default() -> Self { + Self { reputation: 0i32, last_updated: Instant::now(), role: None } + } +} + +impl PeerInfo { + fn is_banned(&self) -> bool { + self.reputation < BANNED_THRESHOLD + } + + fn add_reputation(&mut self, increment: i32) { + self.reputation = self.reputation.saturating_add(increment); + self.bump_last_updated(); + } + + fn decay_reputation(&mut self, seconds_passed: u64) { + // Note that decaying the reputation value happens "on its own", + // so we don't do `bump_last_updated()`. + for _ in 0..seconds_passed { + let mut diff = self.reputation / INVERSE_DECREMENT; + if diff == 0 && self.reputation < 0 { + diff = -1; + } else if diff == 0 && self.reputation > 0 { + diff = 1; + } + + self.reputation = self.reputation.saturating_sub(diff); + + if self.reputation == 0 { + break + } + } + } + + fn bump_last_updated(&mut self) { + self.last_updated = Instant::now(); + } +} + +#[derive(Debug, Default)] +pub struct PeerstoreHandleInner { + peers: HashMap, + protocols: Vec>, + metrics: Option, +} + +#[derive(Debug, Clone, Default)] +pub struct PeerstoreHandle(Arc>); + +impl PeerstoreHandle { + /// Constructs a new [`PeerstoreHandle`]. + fn new( + peers: HashMap, + protocols: Vec>, + metrics: Option, + ) -> Self { + Self(Arc::new(Mutex::new(PeerstoreHandleInner { peers, protocols, metrics }))) + } + + /// Add known peer to [`Peerstore`]. + pub fn add_known_peer(&self, peer: PeerId) { + self.0 + .lock() + .peers + .insert(peer, PeerInfo { reputation: 0i32, last_updated: Instant::now(), role: None }); + } + + pub fn peer_count(&self) -> usize { + self.0.lock().peers.len() + } + + fn progress_time(&self, seconds_passed: u64) { + if seconds_passed == 0 { + return + } + + let mut lock = self.0.lock(); + + // Drive reputation values towards 0. + lock.peers + .iter_mut() + .for_each(|(_, info)| info.decay_reputation(seconds_passed)); + + // Retain only entries with non-zero reputation values or not expired ones. + let now = Instant::now(); + let mut num_banned_peers = 0; + lock.peers.retain(|_, info| { + if info.is_banned() { + num_banned_peers += 1; + } + info.reputation != 0 || info.last_updated + FORGET_AFTER > now + }); + + if let Some(metrics) = &lock.metrics { + metrics.num_discovered.set(lock.peers.len() as u64); + metrics.num_banned_peers.set(num_banned_peers); + } + } +} + +impl PeerStoreProvider for PeerstoreHandle { + fn is_banned(&self, peer: &PeerId) -> bool { + self.0.lock().peers.get(peer).map_or(false, |info| info.is_banned()) + } + + /// Register a protocol handle to disconnect peers whose reputation drops below the threshold. + fn register_protocol(&self, protocol_handle: Arc) { + self.0.lock().protocols.push(protocol_handle); + } + + /// Report peer disconnection for reputation adjustment. + fn report_disconnect(&self, _peer: PeerId) { + unimplemented!(); + } + + /// Adjust peer reputation. + fn report_peer(&self, peer_id: PeerId, change: ReputationChange) { + let mut lock = self.0.lock(); + let peer_info = lock.peers.entry(peer_id).or_default(); + let was_banned = peer_info.is_banned(); + peer_info.add_reputation(change.value); + let peer_reputation = peer_info.reputation; + + log::trace!( + target: LOG_TARGET, + "Report {}: {:+} to {}. Reason: {}.", + peer_id, + change.value, + peer_reputation, + change.reason, + ); + + if !peer_info.is_banned() { + if was_banned { + log::info!( + target: LOG_TARGET, + "Peer {} is now unbanned: {:+} to {}. Reason: {}.", + peer_id, + change.value, + peer_reputation, + change.reason, + ); + } + return; + } + + // Peer is currently banned, disconnect it from all protocols. + lock.protocols.iter().for_each(|handle| handle.disconnect_peer(peer_id.into())); + + // The peer is banned for the first time. + if !was_banned { + log::warn!( + target: LOG_TARGET, + "Report {}: {:+} to {}. Reason: {}. Banned, disconnecting.", + peer_id, + change.value, + peer_reputation, + change.reason, + ); + return; + } + + // The peer was already banned and it got another negative report. + // This may happen during a batch report. + if change.value < 0 { + log::debug!( + target: LOG_TARGET, + "Report {}: {:+} to {}. Reason: {}. Misbehaved during the ban threshold.", + peer_id, + change.value, + peer_reputation, + change.reason, + ); + } + } + + /// Set peer role. + fn set_peer_role(&self, peer: &PeerId, role: ObservedRole) { + self.0.lock().peers.entry(*peer).or_default().role = Some(role); + } + + /// Get peer reputation. + fn peer_reputation(&self, peer: &PeerId) -> i32 { + self.0.lock().peers.get(peer).map_or(0i32, |info| info.reputation) + } + + /// Get peer role, if available. + fn peer_role(&self, peer: &PeerId) -> Option { + self.0.lock().peers.get(peer).and_then(|info| info.role) + } + + /// Get candidates with highest reputations for initiating outgoing connections. + fn outgoing_candidates(&self, count: usize, ignored: HashSet) -> Vec { + let handle = self.0.lock(); + + let mut candidates = handle + .peers + .iter() + .filter_map(|(peer, info)| { + (!ignored.contains(&peer) && !info.is_banned()).then_some((*peer, info.reputation)) + }) + .collect::>(); + candidates.sort_by(|(_, a), (_, b)| b.cmp(a)); + candidates + .into_iter() + .take(count) + .map(|(peer, _score)| peer) + .collect::>() + } + + /// Add known peer. + fn add_known_peer(&self, peer: PeerId) { + self.0.lock().peers.entry(peer).or_default().last_updated = Instant::now(); + } +} + +/// `Peerstore` handle for testing. +/// +/// This instance of `Peerstore` is not shared between protocols. +#[cfg(test)] +pub fn peerstore_handle_test() -> PeerstoreHandle { + PeerstoreHandle(Arc::new(Mutex::new(Default::default()))) +} + +/// Peerstore implementation. +pub struct Peerstore { + /// Handle to `Peerstore`. + peerstore_handle: PeerstoreHandle, +} + +impl Peerstore { + /// Create new [`Peerstore`]. + pub fn new(bootnodes: Vec, metrics_registry: Option) -> Self { + let metrics = if let Some(registry) = &metrics_registry { + PeerStoreMetrics::register(registry) + .map_err(|err| { + log::error!(target: LOG_TARGET, "Failed to register peer store metrics: {}", err); + err + }) + .ok() + } else { + None + }; + + let peerstore_handle = PeerstoreHandle::new( + bootnodes.iter().map(|peer_id| (*peer_id, PeerInfo::default())).collect(), + Vec::new(), + metrics, + ); + + Self { peerstore_handle } + } + + /// Get mutable reference to the underlying [`PeerstoreHandle`]. + pub fn handle(&mut self) -> &mut PeerstoreHandle { + &mut self.peerstore_handle + } + + /// Add known peer to [`Peerstore`]. + pub fn add_known_peer(&mut self, peer: PeerId) { + self.peerstore_handle.add_known_peer(peer); + } + + /// Start [`Peerstore`] event loop. + async fn run(self) { + let started = Instant::now(); + let mut latest_time_update = started; + + loop { + let now = Instant::now(); + // We basically do `(now - self.latest_update).as_secs()`, except that by the way we do + // it we know that we're not going to miss seconds because of rounding to integers. + let seconds_passed = { + let elapsed_latest = latest_time_update - started; + let elapsed_now = now - started; + latest_time_update = now; + elapsed_now.as_secs() - elapsed_latest.as_secs() + }; + + self.peerstore_handle.progress_time(seconds_passed); + let _ = Delay::new(Duration::from_secs(1)).await; + } + } +} + +#[async_trait::async_trait] +impl PeerStore for Peerstore { + /// Get handle to `PeerStore`. + fn handle(&self) -> Arc { + Arc::new(self.peerstore_handle.clone()) + } + + /// Start running `PeerStore` event loop. + async fn run(self) { + self.run().await; + } +} + +#[cfg(test)] +mod tests { + use super::{PeerInfo, PeerStoreProvider, Peerstore}; + + #[test] + fn decaying_zero_reputation_yields_zero() { + let mut peer_info = PeerInfo::default(); + assert_eq!(peer_info.reputation, 0); + + peer_info.decay_reputation(1); + assert_eq!(peer_info.reputation, 0); + + peer_info.decay_reputation(100_000); + assert_eq!(peer_info.reputation, 0); + } + + #[test] + fn decaying_positive_reputation_decreases_it() { + const INITIAL_REPUTATION: i32 = 100; + + let mut peer_info = PeerInfo::default(); + peer_info.reputation = INITIAL_REPUTATION; + + peer_info.decay_reputation(1); + assert!(peer_info.reputation >= 0); + assert!(peer_info.reputation < INITIAL_REPUTATION); + } + + #[test] + fn decaying_negative_reputation_increases_it() { + const INITIAL_REPUTATION: i32 = -100; + + let mut peer_info = PeerInfo::default(); + peer_info.reputation = INITIAL_REPUTATION; + + peer_info.decay_reputation(1); + assert!(peer_info.reputation <= 0); + assert!(peer_info.reputation > INITIAL_REPUTATION); + } + + #[test] + fn decaying_max_reputation_finally_yields_zero() { + const INITIAL_REPUTATION: i32 = i32::MAX; + const SECONDS: u64 = 3544; + + let mut peer_info = PeerInfo::default(); + peer_info.reputation = INITIAL_REPUTATION; + + peer_info.decay_reputation(SECONDS / 2); + assert!(peer_info.reputation > 0); + + peer_info.decay_reputation(SECONDS / 2); + assert_eq!(peer_info.reputation, 0); + } + + #[test] + fn decaying_min_reputation_finally_yields_zero() { + const INITIAL_REPUTATION: i32 = i32::MIN; + const SECONDS: u64 = 3544; + + let mut peer_info = PeerInfo::default(); + peer_info.reputation = INITIAL_REPUTATION; + + peer_info.decay_reputation(SECONDS / 2); + assert!(peer_info.reputation < 0); + + peer_info.decay_reputation(SECONDS / 2); + assert_eq!(peer_info.reputation, 0); + } + + #[test] + fn report_banned_peers() { + let peer_a = sc_network_types::PeerId::random(); + let peer_b = sc_network_types::PeerId::random(); + let peer_c = sc_network_types::PeerId::random(); + + let metrics_registry = prometheus_endpoint::Registry::new(); + let mut peerstore = Peerstore::new( + vec![peer_a, peer_b, peer_c].into_iter().map(Into::into).collect(), + Some(metrics_registry), + ); + let metrics = peerstore.peerstore_handle.0.lock().metrics.as_ref().unwrap().clone(); + let handle = peerstore.handle(); + + // Check initial state. Advance time to propagate peers. + handle.progress_time(1); + assert_eq!(metrics.num_discovered.get(), 3); + assert_eq!(metrics.num_banned_peers.get(), 0); + + // Report 2 peers with a negative reputation. + handle.report_peer( + peer_a, + sc_network_common::types::ReputationChange { value: i32::MIN, reason: "test".into() }, + ); + handle.report_peer( + peer_b, + sc_network_common::types::ReputationChange { value: i32::MIN, reason: "test".into() }, + ); + + // Advance time to propagate peers. + handle.progress_time(1); + assert_eq!(metrics.num_discovered.get(), 3); + assert_eq!(metrics.num_banned_peers.get(), 2); + } +} diff --git a/client/network/src/litep2p/service.rs b/client/network/src/litep2p/service.rs new file mode 100644 index 00000000..13cbbff5 --- /dev/null +++ b/client/network/src/litep2p/service.rs @@ -0,0 +1,583 @@ +// This file is part of Substrate. + +// Copyright (C) Parity Technologies (UK) Ltd. +// SPDX-License-Identifier: GPL-3.0-or-later WITH Classpath-exception-2.0 + +// This program is free software: you can redistribute it and/or modify +// it under the terms of the GNU General Public License as published by +// the Free Software Foundation, either version 3 of the License, or +// (at your option) any later version. + +// This program is distributed in the hope that it will be useful, +// but WITHOUT ANY WARRANTY; without even the implied warranty of +// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +// GNU General Public License for more details. + +// You should have received a copy of the GNU General Public License +// along with this program. If not, see . + +//! `NetworkService` implementation for `litep2p`. + +use crate::{ + config::MultiaddrWithPeerId, + litep2p::shim::{ + notification::{config::ProtocolControlHandle, peerset::PeersetCommand}, + request_response::OutboundRequest, + }, + network_state::NetworkState, + peer_store::PeerStoreProvider, + service::out_events, + Event, IfDisconnected, NetworkDHTProvider, NetworkEventStream, NetworkPeers, NetworkRequest, + NetworkSigner, NetworkStateInfo, NetworkStatus, NetworkStatusProvider, OutboundFailure, + ProtocolName, RequestFailure, Signature, +}; + +use codec::DecodeAll; +use futures::{channel::oneshot, stream::BoxStream}; +use libp2p::identity::SigningError; +use litep2p::{ + addresses::PublicAddresses, crypto::dilithium::Keypair, + types::multiaddr::Multiaddr as LiteP2pMultiaddr, +}; +use parking_lot::RwLock; +use sc_network_types::kad::{Key as KademliaKey, Record}; + +use sc_network_common::{ + role::{ObservedRole, Roles}, + types::ReputationChange, +}; +use sc_network_types::{ + multiaddr::{Multiaddr, Protocol}, + PeerId, +}; +use sc_utils::mpsc::TracingUnboundedSender; + +use std::{ + collections::{HashMap, HashSet}, + sync::{atomic::Ordering, Arc}, + time::Instant, +}; + +/// Logging target for the file. +const LOG_TARGET: &str = "sub-libp2p"; + +/// Commands sent by [`Litep2pNetworkService`] to +/// [`Litep2pNetworkBackend`](super::Litep2pNetworkBackend). +#[derive(Debug)] +pub enum NetworkServiceCommand { + /// Find peers closest to `target` in the DHT. + FindClosestPeers { + /// Target peer ID. + target: PeerId, + }, + + /// Get value from DHT. + GetValue { + /// Record key. + key: KademliaKey, + }, + + /// Put value to DHT. + PutValue { + /// Record key. + key: KademliaKey, + + /// Record value. + value: Vec, + }, + + /// Put value to DHT. + PutValueTo { + /// Record. + record: Record, + /// Peers we want to put the record. + peers: Vec, + /// If we should update the local storage or not. + update_local_storage: bool, + }, + /// Store record in the local DHT store. + StoreRecord { + /// Record key. + key: KademliaKey, + + /// Record value. + value: Vec, + + /// Original publisher of the record. + publisher: Option, + + /// Record expiration time as measured by a local, monothonic clock. + expires: Option, + }, + + /// Start providing `key`. + StartProviding { key: KademliaKey }, + + /// Stop providing `key`. + StopProviding { key: KademliaKey }, + + /// Get providers for `key`. + GetProviders { key: KademliaKey }, + + /// Query network status. + Status { + /// `oneshot::Sender` for sending the status. + tx: oneshot::Sender, + }, + + /// Add `peers` to `protocol`'s reserved set. + AddPeersToReservedSet { + /// Protocol. + protocol: ProtocolName, + + /// Reserved peers. + peers: HashSet, + }, + + /// Add known address for peer. + AddKnownAddress { + /// Peer ID. + peer: PeerId, + + /// Address. + address: Multiaddr, + }, + + /// Set reserved peers for `protocol`. + SetReservedPeers { + /// Protocol. + protocol: ProtocolName, + + /// Reserved peers. + peers: HashSet, + }, + + /// Disconnect peer from protocol. + DisconnectPeer { + /// Protocol. + protocol: ProtocolName, + + /// Peer ID. + peer: PeerId, + }, + + /// Set protocol to reserved only (true/false) mode. + SetReservedOnly { + /// Protocol. + protocol: ProtocolName, + + /// Reserved only? + reserved_only: bool, + }, + + /// Remove reserved peers from protocol. + RemoveReservedPeers { + /// Protocol. + protocol: ProtocolName, + + /// Peers to remove from the reserved set. + peers: HashSet, + }, + + /// Create event stream for DHT events. + EventStream { + /// Sender for the events. + tx: out_events::Sender, + }, +} + +/// `NetworkService` implementation for `litep2p`. +#[derive(Debug, Clone)] +pub struct Litep2pNetworkService { + /// Local peer ID. + local_peer_id: litep2p::PeerId, + + /// The `KeyPair` that defines the `PeerId` of the local node. + keypair: Keypair, + + /// TX channel for sending commands to [`Litep2pNetworkBackend`](super::Litep2pNetworkBackend). + cmd_tx: TracingUnboundedSender, + + /// Handle to `PeerStore`. + peer_store_handle: Arc, + + /// Peerset handles. + peerset_handles: HashMap, + + /// Name for the block announce protocol. + block_announce_protocol: ProtocolName, + + /// Installed request-response protocols. + request_response_protocols: HashMap>, + + /// Listen addresses. + listen_addresses: Arc>>, + + /// External addresses. + external_addresses: PublicAddresses, +} + +impl Litep2pNetworkService { + /// Create new [`Litep2pNetworkService`]. + pub fn new( + local_peer_id: litep2p::PeerId, + keypair: Keypair, + cmd_tx: TracingUnboundedSender, + peer_store_handle: Arc, + peerset_handles: HashMap, + block_announce_protocol: ProtocolName, + request_response_protocols: HashMap>, + listen_addresses: Arc>>, + external_addresses: PublicAddresses, + ) -> Self { + Self { + local_peer_id, + keypair, + cmd_tx, + peer_store_handle, + peerset_handles, + block_announce_protocol, + request_response_protocols, + listen_addresses, + external_addresses, + } + } +} + +impl NetworkSigner for Litep2pNetworkService { + fn sign_with_local_identity(&self, msg: Vec) -> Result { + let public_key = self.keypair.public(); + let bytes = self.keypair.sign(msg.as_ref()); + + Ok(Signature { + public_key: crate::service::signature::PublicKey::Litep2p( + litep2p::crypto::PublicKey::from(public_key), + ), + bytes, + }) + } + + fn verify( + &self, + peer: PeerId, + public_key: &Vec, + signature: &Vec, + message: &Vec, + ) -> Result { + let public_key = litep2p::crypto::PublicKey::from_protobuf_encoding(&public_key) + .map_err(|error| error.to_string())?; + let peer: litep2p::PeerId = peer.into(); + + Ok(peer == public_key.to_peer_id() && public_key.verify(message, signature)) + } +} + +impl NetworkDHTProvider for Litep2pNetworkService { + fn find_closest_peers(&self, target: PeerId) { + let _ = self.cmd_tx.unbounded_send(NetworkServiceCommand::FindClosestPeers { target }); + } + + fn get_value(&self, key: &KademliaKey) { + let _ = self.cmd_tx.unbounded_send(NetworkServiceCommand::GetValue { key: key.clone() }); + } + + fn put_value(&self, key: KademliaKey, value: Vec) { + let _ = self.cmd_tx.unbounded_send(NetworkServiceCommand::PutValue { key, value }); + } + + fn put_record_to(&self, record: Record, peers: HashSet, update_local_storage: bool) { + let _ = self.cmd_tx.unbounded_send(NetworkServiceCommand::PutValueTo { + record: Record { + key: record.key.to_vec().into(), + value: record.value, + publisher: record.publisher.map(|peer_id| { + let peer_id: sc_network_types::PeerId = peer_id.into(); + peer_id.into() + }), + expires: record.expires, + }, + peers: peers.into_iter().collect(), + update_local_storage, + }); + } + + fn store_record( + &self, + key: KademliaKey, + value: Vec, + publisher: Option, + expires: Option, + ) { + let _ = self.cmd_tx.unbounded_send(NetworkServiceCommand::StoreRecord { + key, + value, + publisher, + expires, + }); + } + + fn start_providing(&self, key: KademliaKey) { + let _ = self.cmd_tx.unbounded_send(NetworkServiceCommand::StartProviding { key }); + } + + fn stop_providing(&self, key: KademliaKey) { + let _ = self.cmd_tx.unbounded_send(NetworkServiceCommand::StopProviding { key }); + } + + fn get_providers(&self, key: KademliaKey) { + let _ = self.cmd_tx.unbounded_send(NetworkServiceCommand::GetProviders { key }); + } +} + +#[async_trait::async_trait] +impl NetworkStatusProvider for Litep2pNetworkService { + async fn status(&self) -> Result { + let (tx, rx) = oneshot::channel(); + self.cmd_tx + .unbounded_send(NetworkServiceCommand::Status { tx }) + .map_err(|_| ())?; + + rx.await.map_err(|_| ()) + } + + async fn network_state(&self) -> Result { + Ok(NetworkState { + peer_id: self.local_peer_id.to_base58(), + listened_addresses: self + .listen_addresses + .read() + .iter() + .cloned() + .map(|a| Multiaddr::from(a).into()) + .collect(), + external_addresses: self + .external_addresses + .get_addresses() + .into_iter() + .map(|a| Multiaddr::from(a).into()) + .collect(), + connected_peers: HashMap::new(), + not_connected_peers: HashMap::new(), + // TODO: Check what info we can include here. + // Issue reference: https://github.com/paritytech/substrate/issues/14160. + peerset: serde_json::json!( + "Unimplemented. See https://github.com/paritytech/substrate/issues/14160." + ), + }) + } +} + +// Manual implementation to avoid extra boxing here +// TODO: functions modifying peerset state could be modified to call peerset directly if the +// `Multiaddr` only contains a `PeerId` +#[async_trait::async_trait] +impl NetworkPeers for Litep2pNetworkService { + fn set_authorized_peers(&self, peers: HashSet) { + let _ = self.cmd_tx.unbounded_send(NetworkServiceCommand::SetReservedPeers { + protocol: self.block_announce_protocol.clone(), + peers: peers + .into_iter() + .map(|peer| Multiaddr::empty().with(Protocol::P2p(peer.into()))) + .collect(), + }); + } + + fn set_authorized_only(&self, reserved_only: bool) { + let _ = self.cmd_tx.unbounded_send(NetworkServiceCommand::SetReservedOnly { + protocol: self.block_announce_protocol.clone(), + reserved_only, + }); + } + + fn add_known_address(&self, peer: PeerId, address: Multiaddr) { + let _ = self + .cmd_tx + .unbounded_send(NetworkServiceCommand::AddKnownAddress { peer, address }); + } + + fn peer_reputation(&self, peer_id: &PeerId) -> i32 { + self.peer_store_handle.peer_reputation(peer_id) + } + + fn report_peer(&self, peer: PeerId, cost_benefit: ReputationChange) { + self.peer_store_handle.report_peer(peer, cost_benefit); + } + + fn disconnect_peer(&self, peer: PeerId, protocol: ProtocolName) { + let _ = self + .cmd_tx + .unbounded_send(NetworkServiceCommand::DisconnectPeer { protocol, peer }); + } + + fn accept_unreserved_peers(&self) { + let _ = self.cmd_tx.unbounded_send(NetworkServiceCommand::SetReservedOnly { + protocol: self.block_announce_protocol.clone(), + reserved_only: false, + }); + } + + fn deny_unreserved_peers(&self) { + let _ = self.cmd_tx.unbounded_send(NetworkServiceCommand::SetReservedOnly { + protocol: self.block_announce_protocol.clone(), + reserved_only: true, + }); + } + + fn add_reserved_peer(&self, peer: MultiaddrWithPeerId) -> Result<(), String> { + let _ = self.cmd_tx.unbounded_send(NetworkServiceCommand::AddPeersToReservedSet { + protocol: self.block_announce_protocol.clone(), + peers: HashSet::from_iter([peer.concat().into()]), + }); + + Ok(()) + } + + fn remove_reserved_peer(&self, peer: PeerId) { + let _ = self.cmd_tx.unbounded_send(NetworkServiceCommand::RemoveReservedPeers { + protocol: self.block_announce_protocol.clone(), + peers: HashSet::from_iter([peer]), + }); + } + + fn set_reserved_peers( + &self, + protocol: ProtocolName, + peers: HashSet, + ) -> Result<(), String> { + let _ = self + .cmd_tx + .unbounded_send(NetworkServiceCommand::SetReservedPeers { protocol, peers }); + Ok(()) + } + + fn add_peers_to_reserved_set( + &self, + protocol: ProtocolName, + peers: HashSet, + ) -> Result<(), String> { + let _ = self + .cmd_tx + .unbounded_send(NetworkServiceCommand::AddPeersToReservedSet { protocol, peers }); + Ok(()) + } + + fn remove_peers_from_reserved_set( + &self, + protocol: ProtocolName, + peers: Vec, + ) -> Result<(), String> { + let _ = self.cmd_tx.unbounded_send(NetworkServiceCommand::RemoveReservedPeers { + protocol, + peers: peers.into_iter().map(From::from).collect(), + }); + + Ok(()) + } + + fn sync_num_connected(&self) -> usize { + self.peerset_handles + .get(&self.block_announce_protocol) + .map_or(0usize, |handle| handle.connected_peers.load(Ordering::Relaxed)) + } + + fn peer_role(&self, peer: PeerId, handshake: Vec) -> Option { + match Roles::decode_all(&mut &handshake[..]) { + Ok(role) => Some(role.into()), + Err(_) => { + log::debug!(target: LOG_TARGET, "handshake doesn't contain peer role: {handshake:?}"); + self.peer_store_handle.peer_role(&(peer.into())) + }, + } + } + + /// Get the list of reserved peers. + /// + /// Returns an error if the `NetworkWorker` is no longer running. + async fn reserved_peers(&self) -> Result, ()> { + let Some(handle) = self.peerset_handles.get(&self.block_announce_protocol) else { + return Err(()) + }; + let (tx, rx) = oneshot::channel(); + + handle + .tx + .unbounded_send(PeersetCommand::GetReservedPeers { tx }) + .map_err(|_| ())?; + + // the channel can only be closed if `Peerset` no longer exists + rx.await.map_err(|_| ()) + } +} + +impl NetworkEventStream for Litep2pNetworkService { + fn event_stream(&self, stream_name: &'static str) -> BoxStream<'static, Event> { + let (tx, rx) = out_events::channel(stream_name, 100_000); + let _ = self.cmd_tx.unbounded_send(NetworkServiceCommand::EventStream { tx }); + Box::pin(rx) + } +} + +impl NetworkStateInfo for Litep2pNetworkService { + fn external_addresses(&self) -> Vec { + self.external_addresses.get_addresses().into_iter().map(Into::into).collect() + } + + fn listen_addresses(&self) -> Vec { + self.listen_addresses.read().iter().cloned().map(Into::into).collect() + } + + fn local_peer_id(&self) -> PeerId { + self.local_peer_id.into() + } +} + +// Manual implementation to avoid extra boxing here +#[async_trait::async_trait] +impl NetworkRequest for Litep2pNetworkService { + async fn request( + &self, + target: PeerId, + protocol: ProtocolName, + request: Vec, + fallback_request: Option<(Vec, ProtocolName)>, + connect: IfDisconnected, + ) -> Result<(Vec, ProtocolName), RequestFailure> { + let (tx, rx) = oneshot::channel(); + + self.start_request(target, protocol, request, fallback_request, tx, connect); + + match rx.await { + Ok(v) => v, + // The channel can only be closed if the network worker no longer exists. If the + // network worker no longer exists, then all connections to `target` are necessarily + // closed, and we legitimately report this situation as a "ConnectionClosed". + Err(_) => Err(RequestFailure::Network(OutboundFailure::ConnectionClosed)), + } + } + + fn start_request( + &self, + peer: PeerId, + protocol: ProtocolName, + request: Vec, + fallback_request: Option<(Vec, ProtocolName)>, + sender: oneshot::Sender, ProtocolName), RequestFailure>>, + connect: IfDisconnected, + ) { + match self.request_response_protocols.get(&protocol) { + Some(tx) => { + let _ = tx.unbounded_send(OutboundRequest::new( + peer, + request, + sender, + fallback_request, + connect, + )); + }, + None => log::warn!( + target: LOG_TARGET, + "{protocol} doesn't exist, cannot send request to {peer:?}" + ), + } + } +} diff --git a/client/network/src/litep2p/shim/bitswap.rs b/client/network/src/litep2p/shim/bitswap.rs new file mode 100644 index 00000000..6fa646ca --- /dev/null +++ b/client/network/src/litep2p/shim/bitswap.rs @@ -0,0 +1,113 @@ +// This file is part of Substrate. + +// Copyright (C) Parity Technologies (UK) Ltd. +// SPDX-License-Identifier: GPL-3.0-or-later WITH Classpath-exception-2.0 + +// This program is free software: you can redistribute it and/or modify +// it under the terms of the GNU General Public License as published by +// the Free Software Foundation, either version 3 of the License, or +// (at your option) any later version. + +// This program is distributed in the hope that it will be useful, +// but WITHOUT ANY WARRANTY; without even the implied warranty of +// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +// GNU General Public License for more details. + +// You should have received a copy of the GNU General Public License +// along with this program. If not, see . + +//! Shim for litep2p's Bitswap implementation to make it work with `sc-network`. + +use futures::StreamExt; +use litep2p::protocol::libp2p::bitswap::{ + BitswapEvent, BitswapHandle, BlockPresenceType, Config, ResponseType, WantType, +}; + +use sc_client_api::BlockBackend; +use sp_runtime::traits::Block as BlockT; + +use std::{future::Future, pin::Pin, sync::Arc}; + +/// Logging target for the file. +const LOG_TARGET: &str = "sub-libp2p::bitswap"; + +pub struct BitswapServer { + /// Bitswap handle. + handle: BitswapHandle, + + /// Blockchain client. + client: Arc + Send + Sync>, +} + +impl BitswapServer { + /// Create new [`BitswapServer`]. + pub fn new( + client: Arc + Send + Sync>, + ) -> (Pin + Send>>, Config) { + let (config, handle) = Config::new(); + let bitswap = Self { client, handle }; + + (Box::pin(async move { bitswap.run().await }), config) + } + + async fn run(mut self) { + log::debug!(target: LOG_TARGET, "starting bitswap server"); + + while let Some(event) = self.handle.next().await { + match event { + BitswapEvent::Request { peer, cids } => { + log::debug!(target: LOG_TARGET, "handle bitswap request from {peer:?} for {cids:?}"); + + let response: Vec = cids + .into_iter() + .map(|(cid, want_type)| { + let mut hash = Block::Hash::default(); + hash.as_mut().copy_from_slice(&cid.hash().digest()[0..32]); + let transaction = match self.client.indexed_transaction(hash) { + Ok(ex) => ex, + Err(error) => { + log::error!(target: LOG_TARGET, "error retrieving transaction {hash}: {error}"); + None + }, + }; + + match transaction { + Some(transaction) => { + log::trace!(target: LOG_TARGET, "found cid {cid:?}, hash {hash:?}"); + + match want_type { + WantType::Block => + ResponseType::Block { cid, block: transaction }, + _ => ResponseType::Presence { + cid, + presence: BlockPresenceType::Have, + }, + } + }, + None => { + log::trace!(target: LOG_TARGET, "missing cid {cid:?}, hash {hash:?}"); + + ResponseType::Presence { + cid, + presence: BlockPresenceType::DontHave, + } + }, + } + }) + .collect(); + + self.handle.send_response(peer, response).await; + }, + BitswapEvent::Response { peer, responses } => { + // Server-side: we don't initiate requests, so we don't expect responses. + // Log and ignore. + log::trace!( + target: LOG_TARGET, + "unexpected bitswap response from {peer:?} with {} entries (ignored)", + responses.len() + ); + }, + } + } + } +} diff --git a/client/network/src/litep2p/shim/mod.rs b/client/network/src/litep2p/shim/mod.rs new file mode 100644 index 00000000..5eaf77ff --- /dev/null +++ b/client/network/src/litep2p/shim/mod.rs @@ -0,0 +1,23 @@ +// This file is part of Substrate. + +// Copyright (C) Parity Technologies (UK) Ltd. +// SPDX-License-Identifier: GPL-3.0-or-later WITH Classpath-exception-2.0 + +// This program is free software: you can redistribute it and/or modify +// it under the terms of the GNU General Public License as published by +// the Free Software Foundation, either version 3 of the License, or +// (at your option) any later version. + +// This program is distributed in the hope that it will be useful, +// but WITHOUT ANY WARRANTY; without even the implied warranty of +// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +// GNU General Public License for more details. + +// You should have received a copy of the GNU General Public License +// along with this program. If not, see . + +//! Shims for fitting `litep2p` APIs to `sc-network` APIs. + +pub(crate) mod bitswap; +pub(crate) mod notification; +pub(crate) mod request_response; diff --git a/client/network/src/litep2p/shim/notification/config.rs b/client/network/src/litep2p/shim/notification/config.rs new file mode 100644 index 00000000..70e136da --- /dev/null +++ b/client/network/src/litep2p/shim/notification/config.rs @@ -0,0 +1,168 @@ +// This file is part of Substrate. + +// Copyright (C) Parity Technologies (UK) Ltd. +// SPDX-License-Identifier: GPL-3.0-or-later WITH Classpath-exception-2.0 + +// This program is free software: you can redistribute it and/or modify +// it under the terms of the GNU General Public License as published by +// the Free Software Foundation, either version 3 of the License, or +// (at your option) any later version. + +// This program is distributed in the hope that it will be useful, +// but WITHOUT ANY WARRANTY; without even the implied warranty of +// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +// GNU General Public License for more details. + +// You should have received a copy of the GNU General Public License +// along with this program. If not, see . + +//! `litep2p` notification protocol configuration. + +use crate::{ + config::{MultiaddrWithPeerId, NonReservedPeerMode, NotificationHandshake, SetConfig}, + litep2p::shim::notification::{ + peerset::{Peerset, PeersetCommand}, + NotificationProtocol, + }, + peer_store::PeerStoreProvider, + service::{metrics::NotificationMetrics, traits::NotificationConfig}, + NotificationService, ProtocolName, +}; + +use litep2p::protocol::notification::{Config, ConfigBuilder}; + +use sc_utils::mpsc::TracingUnboundedSender; + +use std::sync::{atomic::AtomicUsize, Arc}; + +/// Handle for controlling the notification protocol. +#[derive(Debug, Clone)] +pub struct ProtocolControlHandle { + /// TX channel for sending commands to `Peerset` of the notification protocol. + pub tx: TracingUnboundedSender, + + /// Peers currently connected to this protocol. + pub connected_peers: Arc, +} + +impl ProtocolControlHandle { + /// Create new [`ProtocolControlHandle`]. + pub fn new( + tx: TracingUnboundedSender, + connected_peers: Arc, + ) -> Self { + Self { tx, connected_peers } + } +} + +/// Configuration for the notification protocol. +#[derive(Debug)] +pub struct NotificationProtocolConfig { + /// Name of the notifications protocols of this set. A substream on this set will be + /// considered established once this protocol is open. + pub protocol_name: ProtocolName, + + /// Maximum allowed size of single notifications. + max_notification_size: usize, + + /// Base configuration. + set_config: SetConfig, + + /// `litep2p` notification config. + pub config: Config, + + /// Handle for controlling the notification protocol. + pub handle: ProtocolControlHandle, +} + +impl NotificationProtocolConfig { + // Create new [`NotificationProtocolConfig`]. + pub fn new( + protocol_name: ProtocolName, + fallback_names: Vec, + max_notification_size: usize, + handshake: Option, + set_config: SetConfig, + metrics: NotificationMetrics, + peerstore_handle: Arc, + ) -> (Self, Box) { + // create `Peerset`/`Peerstore` handle for the protocol + let connected_peers = Arc::new(Default::default()); + let (peerset, peerset_tx) = Peerset::new( + protocol_name.clone(), + set_config.out_peers as usize, + set_config.in_peers as usize, + set_config.non_reserved_mode == NonReservedPeerMode::Deny, + set_config.reserved_nodes.iter().map(|address| address.peer_id).collect(), + Arc::clone(&connected_peers), + peerstore_handle, + ); + + // create `litep2p` notification protocol configuration for the protocol + // + // NOTE: currently only dummy value is given as the handshake as protocols (apart from + // syncing) are not configuring their own handshake and instead default to role being the + // handshake. As the time of writing this, most protocols are not aware of the role and + // that should be refactored in the future. + let (config, handle) = ConfigBuilder::new(protocol_name.clone().into()) + .with_handshake(handshake.map_or(vec![1], |handshake| (*handshake).to_vec())) + .with_max_size(max_notification_size as usize) + .with_auto_accept_inbound(true) + .with_fallback_names(fallback_names.into_iter().map(From::from).collect()) + .build(); + + // initialize the actual object implementing `NotificationService` and combine the + // `litep2p::NotificationHandle` with `Peerset` to implement a full and independent + // notification protocol runner + let protocol = NotificationProtocol::new(protocol_name.clone(), handle, peerset, metrics); + + ( + Self { + protocol_name, + max_notification_size, + set_config, + config, + handle: ProtocolControlHandle::new(peerset_tx, connected_peers), + }, + Box::new(protocol), + ) + } + + /// Get reference to protocol name. + pub fn protocol_name(&self) -> &ProtocolName { + &self.protocol_name + } + + /// Get reference to `SetConfig`. + pub fn set_config(&self) -> &SetConfig { + &self.set_config + } + + /// Modifies the configuration to allow non-reserved nodes. + pub fn allow_non_reserved(&mut self, in_peers: u32, out_peers: u32) { + self.set_config.in_peers = in_peers; + self.set_config.out_peers = out_peers; + self.set_config.non_reserved_mode = NonReservedPeerMode::Accept; + } + + /// Add a node to the list of reserved nodes. + pub fn add_reserved(&mut self, peer: MultiaddrWithPeerId) { + self.set_config.reserved_nodes.push(peer); + } + + /// Get maximum notification size. + pub fn max_notification_size(&self) -> usize { + self.max_notification_size + } +} + +impl NotificationConfig for NotificationProtocolConfig { + fn set_config(&self) -> &SetConfig { + &self.set_config + } + + /// Get reference to protocol name. + fn protocol_name(&self) -> &ProtocolName { + &self.protocol_name + } +} diff --git a/client/network/src/litep2p/shim/notification/mod.rs b/client/network/src/litep2p/shim/notification/mod.rs new file mode 100644 index 00000000..8a320a00 --- /dev/null +++ b/client/network/src/litep2p/shim/notification/mod.rs @@ -0,0 +1,374 @@ +// This file is part of Substrate. + +// Copyright (C) Parity Technologies (UK) Ltd. +// SPDX-License-Identifier: GPL-3.0-or-later WITH Classpath-exception-2.0 + +// This program is free software: you can redistribute it and/or modify +// it under the terms of the GNU General Public License as published by +// the Free Software Foundation, either version 3 of the License, or +// (at your option) any later version. + +// This program is distributed in the hope that it will be useful, +// but WITHOUT ANY WARRANTY; without even the implied warranty of +// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +// GNU General Public License for more details. + +// You should have received a copy of the GNU General Public License +// along with this program. If not, see . + +//! Shim for `litep2p::NotificationHandle` to combine `Peerset`-like behavior +//! with `NotificationService`. + +use crate::{ + error::Error, + litep2p::shim::notification::peerset::{OpenResult, Peerset, PeersetNotificationCommand}, + service::{ + metrics::NotificationMetrics, + traits::{NotificationEvent as SubstrateNotificationEvent, ValidationResult}, + }, + MessageSink, NotificationService, ProtocolName, +}; + +use futures::{future::BoxFuture, stream::FuturesUnordered, StreamExt}; +use litep2p::protocol::notification::{ + NotificationEvent, NotificationHandle, NotificationSink, + ValidationResult as Litep2pValidationResult, +}; +use tokio::sync::oneshot; + +use sc_network_types::PeerId; + +use std::{collections::HashSet, fmt}; + +pub mod config; +pub mod peerset; + +#[cfg(test)] +mod tests; + +/// Logging target for the file. +const LOG_TARGET: &str = "sub-libp2p::notification"; + +/// Wrapper over `litep2p`'s notification sink. +pub struct Litep2pMessageSink { + /// Protocol. + protocol: ProtocolName, + + /// Remote peer ID. + peer: PeerId, + + /// Notification sink. + sink: NotificationSink, + + /// Notification metrics. + metrics: NotificationMetrics, +} + +impl Litep2pMessageSink { + /// Create new [`Litep2pMessageSink`]. + fn new( + peer: PeerId, + protocol: ProtocolName, + sink: NotificationSink, + metrics: NotificationMetrics, + ) -> Self { + Self { protocol, peer, sink, metrics } + } +} + +#[async_trait::async_trait] +impl MessageSink for Litep2pMessageSink { + /// Send synchronous `notification` to the peer associated with this [`MessageSink`]. + fn send_sync_notification(&self, notification: Vec) { + let size = notification.len(); + + match self.sink.send_sync_notification(notification) { + Ok(_) => self.metrics.register_notification_sent(&self.protocol, size), + Err(error) => log::trace!( + target: LOG_TARGET, + "{}: failed to send sync notification to {:?}: {error:?}", + self.protocol, + self.peer, + ), + } + } + + /// Send an asynchronous `notification` to to the peer associated with this [`MessageSink`], + /// allowing sender to exercise backpressure. + /// + /// Returns an error if the peer does not exist. + async fn send_async_notification(&self, notification: Vec) -> Result<(), Error> { + let size = notification.len(); + + match self.sink.send_async_notification(notification).await { + Ok(_) => { + self.metrics.register_notification_sent(&self.protocol, size); + Ok(()) + }, + Err(error) => { + log::trace!( + target: LOG_TARGET, + "{}: failed to send async notification to {:?}: {error:?}", + self.protocol, + self.peer, + ); + + Err(Error::Litep2p(error)) + }, + } + } +} + +/// Notification protocol implementation. +pub struct NotificationProtocol { + /// Protocol name. + protocol: ProtocolName, + + /// `litep2p` notification handle. + handle: NotificationHandle, + + /// Peerset for the notification protocol. + /// + /// Listens to peering-related events and either opens or closes substreams to remote peers. + peerset: Peerset, + + /// Pending validations for inbound substreams. + pending_validations: FuturesUnordered< + BoxFuture<'static, (PeerId, Result)>, + >, + + /// Pending cancels. + pending_cancels: HashSet, + + /// Notification metrics. + metrics: NotificationMetrics, +} + +impl fmt::Debug for NotificationProtocol { + fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { + f.debug_struct("NotificationProtocol") + .field("protocol", &self.protocol) + .field("handle", &self.handle) + .finish() + } +} + +impl NotificationProtocol { + /// Create new [`NotificationProtocol`]. + pub fn new( + protocol: ProtocolName, + handle: NotificationHandle, + peerset: Peerset, + metrics: NotificationMetrics, + ) -> Self { + Self { + protocol, + handle, + peerset, + metrics, + pending_cancels: HashSet::new(), + pending_validations: FuturesUnordered::new(), + } + } + + /// Handle `Peerset` command. + async fn on_peerset_command(&mut self, command: PeersetNotificationCommand) { + match command { + PeersetNotificationCommand::OpenSubstream { peers } => { + log::debug!(target: LOG_TARGET, "{}: open substreams to {peers:?}", self.protocol); + + let _ = self.handle.open_substream_batch(peers.into_iter().map(From::from)).await; + }, + PeersetNotificationCommand::CloseSubstream { peers } => { + log::debug!(target: LOG_TARGET, "{}: close substreams to {peers:?}", self.protocol); + + self.handle.close_substream_batch(peers.into_iter().map(From::from)).await; + }, + } + } +} + +#[async_trait::async_trait] +impl NotificationService for NotificationProtocol { + async fn open_substream(&mut self, _peer: PeerId) -> Result<(), ()> { + unimplemented!(); + } + + async fn close_substream(&mut self, _peer: PeerId) -> Result<(), ()> { + unimplemented!(); + } + + fn send_sync_notification(&mut self, peer: &PeerId, notification: Vec) { + let size = notification.len(); + + if let Ok(_) = self.handle.send_sync_notification(peer.into(), notification) { + self.metrics.register_notification_sent(&self.protocol, size); + } + } + + async fn send_async_notification( + &mut self, + peer: &PeerId, + notification: Vec, + ) -> Result<(), Error> { + let size = notification.len(); + + match self.handle.send_async_notification(peer.into(), notification).await { + Ok(_) => { + self.metrics.register_notification_sent(&self.protocol, size); + Ok(()) + }, + Err(_) => Err(Error::ChannelClosed), + } + } + + /// Set handshake for the notification protocol replacing the old handshake. + async fn set_handshake(&mut self, handshake: Vec) -> Result<(), ()> { + self.handle.set_handshake(handshake); + + Ok(()) + } + + /// Set handshake for the notification protocol replacing the old handshake. + /// + /// For `litep2p` this is identical to `NotificationService::set_handshake()` since `litep2p` + /// allows updating the handshake synchronously. + fn try_set_handshake(&mut self, handshake: Vec) -> Result<(), ()> { + self.handle.set_handshake(handshake); + + Ok(()) + } + + /// Make a copy of the object so it can be shared between protocol components + /// who wish to have access to the same underlying notification protocol. + fn clone(&mut self) -> Result, ()> { + unimplemented!("clonable `NotificationService` not supported by `litep2p`"); + } + + /// Get protocol name of the `NotificationService`. + fn protocol(&self) -> &ProtocolName { + &self.protocol + } + + /// Get message sink of the peer. + fn message_sink(&self, peer: &PeerId) -> Option> { + self.handle.notification_sink(peer.into()).map(|sink| { + let sink: Box = Box::new(Litep2pMessageSink::new( + *peer, + self.protocol.clone(), + sink, + self.metrics.clone(), + )); + sink + }) + } + + /// Get next event from the `Notifications` event stream. + async fn next_event(&mut self) -> Option { + loop { + tokio::select! { + biased; + + event = self.handle.next() => match event? { + NotificationEvent::ValidateSubstream { peer, handshake, .. } => { + if let ValidationResult::Reject = self.peerset.report_inbound_substream(peer.into()) { + self.handle.send_validation_result(peer, Litep2pValidationResult::Reject); + continue; + } + + let (tx, rx) = oneshot::channel(); + self.pending_validations.push(Box::pin(async move { (peer.into(), rx.await) })); + + log::trace!(target: LOG_TARGET, "{}: validate substream for {peer:?}", self.protocol); + + return Some(SubstrateNotificationEvent::ValidateInboundSubstream { + peer: peer.into(), + handshake, + result_tx: tx, + }); + } + NotificationEvent::NotificationStreamOpened { + peer, + fallback, + handshake, + direction, + .. + } => { + self.metrics.register_substream_opened(&self.protocol); + + match self.peerset.report_substream_opened(peer.into(), direction.into()) { + OpenResult::Reject => { + let _ = self.handle.close_substream_batch(vec![peer].into_iter().map(From::from)).await; + self.pending_cancels.insert(peer); + + continue + } + OpenResult::Accept { direction } => { + log::trace!(target: LOG_TARGET, "{}: substream opened for {peer:?}", self.protocol); + + return Some(SubstrateNotificationEvent::NotificationStreamOpened { + peer: peer.into(), + handshake, + direction, + negotiated_fallback: fallback.map(From::from), + }); + } + } + } + NotificationEvent::NotificationStreamClosed { + peer, + } => { + log::trace!(target: LOG_TARGET, "{}: substream closed for {peer:?}", self.protocol); + + self.metrics.register_substream_closed(&self.protocol); + self.peerset.report_substream_closed(peer.into()); + + if self.pending_cancels.remove(&peer) { + log::debug!( + target: LOG_TARGET, + "{}: substream closed to canceled peer ({peer:?})", + self.protocol + ); + continue + } + + return Some(SubstrateNotificationEvent::NotificationStreamClosed { peer: peer.into() }) + } + NotificationEvent::NotificationStreamOpenFailure { + peer, + error, + } => { + log::trace!(target: LOG_TARGET, "{}: open failure for {peer:?}", self.protocol); + self.peerset.report_substream_open_failure(peer.into(), error); + } + NotificationEvent::NotificationReceived { + peer, + notification, + } => { + self.metrics.register_notification_received(&self.protocol, notification.len()); + + if !self.pending_cancels.contains(&peer) { + return Some(SubstrateNotificationEvent::NotificationReceived { + peer: peer.into(), + notification: notification.to_vec(), + }); + } + } + }, + result = self.pending_validations.next(), if !self.pending_validations.is_empty() => { + let (peer, result) = result?; + let validation_result = match result { + Ok(ValidationResult::Accept) => Litep2pValidationResult::Accept, + _ => { + self.peerset.report_substream_rejected(peer); + Litep2pValidationResult::Reject + } + }; + + self.handle.send_validation_result(peer.into(), validation_result); + } + command = self.peerset.next() => self.on_peerset_command(command?).await, + } + } + } +} diff --git a/client/network/src/litep2p/shim/notification/peerset.rs b/client/network/src/litep2p/shim/notification/peerset.rs new file mode 100644 index 00000000..38215881 --- /dev/null +++ b/client/network/src/litep2p/shim/notification/peerset.rs @@ -0,0 +1,1516 @@ +// This file is part of Substrate. + +// Copyright (C) Parity Technologies (UK) Ltd. +// SPDX-License-Identifier: GPL-3.0-or-later WITH Classpath-exception-2.0 + +// This program is free software: you can redistribute it and/or modify +// it under the terms of the GNU General Public License as published by +// the Free Software Foundation, either version 3 of the License, or +// (at your option) any later version. + +// This program is distributed in the hope that it will be useful, +// but WITHOUT ANY WARRANTY; without even the implied warranty of +// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +// GNU General Public License for more details. + +// You should have received a copy of the GNU General Public License +// along with this program. If not, see . + +//! [`Peerset`] implementation for `litep2p`. +//! +//! [`Peerset`] is a separate but related component running alongside the notification protocol, +//! responsible for maintaining connectivity to remote peers. [`Peerset`] has an imperfect view of +//! the network as the notification protocol is behind an asynchronous channel. Based on this +//! imperfect view, it tries to connect to remote peers and disconnect peers that should be +//! disconnected from. +//! +//! [`Peerset`] knows of two types of peers: +//! - normal peers +//! - reserved peers +//! +//! Reserved peers are those which the [`Peerset`] should be connected at all times and it will make +//! an effort to do so by constantly checking that there are no disconnected reserved peers (except +//! banned) and if there are, it will open substreams to them. +//! +//! [`Peerset`] may also contain "slots", both inbound and outbound, which mark how many incoming +//! and outgoing connections it should maintain at all times. Peers for the inbound slots are filled +//! by remote peers opening inbound substreams towards the local node and peers for the outbound +//! slots are filled by querying the `Peerstore` which contains all peers known to `sc-network`. +//! Peers for outbound slots are selected in a decreasing order of reputation. + +use crate::{ + peer_store::{PeerStoreProvider, ProtocolHandle}, + service::traits::{self, ValidationResult}, + ProtocolName, ReputationChange as Reputation, +}; + +use futures::{channel::oneshot, future::BoxFuture, stream::FuturesUnordered, Stream, StreamExt}; +use futures_timer::Delay; +use litep2p::protocol::notification::NotificationError; + +use sc_network_types::PeerId; +use sc_utils::mpsc::{tracing_unbounded, TracingUnboundedReceiver, TracingUnboundedSender}; + +use std::{ + collections::{HashMap, HashSet}, + future::Future, + pin::Pin, + sync::{ + atomic::{AtomicUsize, Ordering}, + Arc, + }, + task::{Context, Poll}, + time::Duration, +}; + +/// Logging target for the file. +const LOG_TARGET: &str = "sub-libp2p::peerset"; + +/// Default backoff for connection re-attempts. +const DEFAULT_BACKOFF: Duration = Duration::from_secs(5); + +/// Open failure backoff. +const OPEN_FAILURE_BACKOFF: Duration = Duration::from_secs(5); + +/// Slot allocation frequency. +/// +/// How often should [`Peerset`] attempt to establish outbound connections. +const SLOT_ALLOCATION_FREQUENCY: Duration = Duration::from_secs(1); + +/// Reputation adjustment when a peer gets disconnected. +/// +/// Lessens the likelyhood of the peer getting selected for an outbound connection soon. +const DISCONNECT_ADJUSTMENT: Reputation = Reputation::new(-256, "Peer disconnected"); + +/// Reputation adjustment when a substream fails to open. +/// +/// Lessens the likelyhood of the peer getting selected for an outbound connection soon. +const OPEN_FAILURE_ADJUSTMENT: Reputation = Reputation::new(-1024, "Open failure"); + +/// Is the peer reserved? +/// +/// Regular peers count towards slot allocation. +#[derive(Debug, Copy, Clone, PartialEq, Eq)] +pub enum Reserved { + Yes, + No, +} + +impl From for Reserved { + fn from(value: bool) -> Reserved { + match value { + true => Reserved::Yes, + false => Reserved::No, + } + } +} + +impl From for bool { + fn from(value: Reserved) -> bool { + std::matches!(value, Reserved::Yes) + } +} + +#[derive(Debug, Copy, Clone, PartialEq, Eq)] +pub enum Direction { + /// Inbound substream. + Inbound(Reserved), + + /// Outbound substream. + Outbound(Reserved), +} + +impl Direction { + fn set_reserved(&mut self, new_reserved: Reserved) { + match self { + Direction::Inbound(ref mut reserved) | Direction::Outbound(ref mut reserved) => + *reserved = new_reserved, + } + } +} + +impl From for traits::Direction { + fn from(direction: Direction) -> traits::Direction { + match direction { + Direction::Inbound(_) => traits::Direction::Inbound, + Direction::Outbound(_) => traits::Direction::Outbound, + } + } +} + +impl From for traits::Direction { + fn from(direction: litep2p::protocol::notification::Direction) -> traits::Direction { + match direction { + litep2p::protocol::notification::Direction::Inbound => traits::Direction::Inbound, + litep2p::protocol::notification::Direction::Outbound => traits::Direction::Outbound, + } + } +} + +/// Open result for a fully-opened connection. +#[derive(PartialEq, Eq, Debug)] +pub enum OpenResult { + /// Accept the connection. + Accept { + /// Direction which [`Peerset`] considers to be correct. + direction: traits::Direction, + }, + + /// Reject the connection because it was canceled while it was opening. + Reject, +} + +/// Commands emitted by other subsystems of the blockchain to [`Peerset`]. +#[derive(Debug)] +pub enum PeersetCommand { + /// Set current reserved peer set. + /// + /// This command removes all reserved peers that are not in `peers`. + SetReservedPeers { + /// New reserved peer set. + peers: HashSet, + }, + + /// Add one or more reserved peers. + /// + /// This command doesn't remove any reserved peers but only add new peers. + AddReservedPeers { + /// Reserved peers to add. + peers: HashSet, + }, + + /// Remove reserved peers. + RemoveReservedPeers { + /// Reserved peers to remove. + peers: HashSet, + }, + + /// Set reserved-only mode to true/false. + SetReservedOnly { + /// Should the protocol only accept/establish connections to reserved peers. + reserved_only: bool, + }, + + /// Disconnect peer. + DisconnectPeer { + /// Peer ID. + peer: PeerId, + }, + + /// Get reserved peers. + GetReservedPeers { + /// `oneshot::Sender` for sending the current set of reserved peers. + tx: oneshot::Sender>, + }, +} + +/// Commands emitted by [`Peerset`] to the notification protocol. +#[derive(Debug)] +pub enum PeersetNotificationCommand { + /// Open substreams to one or more peers. + OpenSubstream { + /// Peer IDs. + peers: Vec, + }, + + /// Close substream to one or more peers. + CloseSubstream { + /// Peer IDs. + peers: Vec, + }, +} + +/// Peer state. +/// +/// Peer can be in 6 different state: +/// - disconnected +/// - connected +/// - connection is opening +/// - connection is closing +/// - connection is backed-off +/// - connection is canceled +/// +/// Opening and closing are separate states as litep2p guarantees to report when the substream is +/// either fully open or fully closed and the slot allocation for opening a substream is tied to a +/// state transition which moves the peer to [`PeerState::Opening`]. This is because it allows +/// reserving a slot for peer to prevent infinite outbound substreams. If the substream is opened +/// successfully, peer is moved to state [`PeerState::Connected`] but there is no modification to +/// the slot count as an outbound slot was already allocated for the peer. If the substream fails to +/// open, the event is reported by litep2p and [`Peerset::report_substream_open_failure()`] is +/// called which will decrease the outbound slot count. Similarly for inbound streams, the slot is +/// allocated in [`Peerset::report_inbound_substream()`] which will prevent `Peerset` from accepting +/// infinite inbound substreams. If the inbound substream fails to open and since [`Peerset`] was +/// notified of it, litep2p will report the open failure and the inbound slot count is once again +/// decreased in [`Peerset::report_substream_open_failure()`]. If the substream is opened +/// successfully, the slot count is not modified. +/// +/// Since closing a substream is not instantaneous, there is a separate [`PeerState::Closing`] +/// state which indicates that the substream is being closed but hasn't been closed by litep2p yet. +/// This state is used to prevent invalid state transitions where, for example, [`Peerset`] would +/// close a substream and then try to reopen it immediately. +/// +/// Irrespective of which side closed the substream (local/remote), the substream is chilled for a +/// small amount of time ([`DEFAULT_BACKOFF`]) and during this time no inbound or outbound +/// substreams are accepted/established. Any request to open an outbound substream while the peer +/// is backed-off is ignored. If the peer is a reserved peer, an outbound substream is not opened +/// for them immediately but after the back-off has expired, `Peerset` will attempt to open a +/// substream to the peer if it's still counted as a reserved peer. +/// +/// Disconnections and open failures will contribute negatively to the peer score to prevent it from +/// being selected for another outbound substream request soon after the failure/disconnection. The +/// reputation decays towards zero over time and eventually the peer will be as likely to be +/// selected for an outbound substream as any other freshly added peer. +/// +/// [`Peerset`] must also be able to handle the case where an outbound substream was opened to peer +/// and while it was opening, an inbound substream was received from that same peer. Since `litep2p` +/// is the source of truth of the actual state of the connection, [`Peerset`] must compensate for +/// this and if it happens that inbound substream is opened for a peer that was marked outbound, it +/// will attempt to allocate an inbound slot for the peer. If it fails to do so, the inbound +/// substream is rejected and the peer is marked as canceled. +/// +/// Since substream is not opened immediately, a peer can be disconnected even if the substream was +/// not yet open. This can happen, for example, when a peer has connected over the syncing protocol +/// and it was added to, e.g., GRANDPA's reserved peers, an outbound substream was opened +/// ([`PeerState::Opening`]) and then the peer disconnected. This state transition is handled by the +/// [`Peerset`] with `PeerState::Canceled` which indicates that should the substream open +/// successfully, it should be closed immediately and if the connection is opened successfully while +/// the peer was marked as canceled, the substream will be closed without notifying the protocol +/// about the substream. +#[derive(Debug, PartialEq, Eq)] +pub enum PeerState { + /// No active connection to peer. + Disconnected, + + /// Substream to peer was recently closed and the peer is currently backed off. + /// + /// Backoff only applies to outbound substreams. Inbound substream will not experience any sort + /// of "banning" even if the peer is backed off and an inbound substream for the peer is + /// received. + Backoff, + + /// Connection to peer is pending. + Opening { + /// Direction of the connection. + direction: Direction, + }, + + // Connected to peer. + Connected { + /// Is the peer inbound or outbound. + direction: Direction, + }, + + /// Substream was opened and while it was opening (no response had been heard from litep2p), + /// the substream was canceled by either calling `disconnect_peer()` or by removing peer + /// from the reserved set. + /// + /// After the opened substream is acknowledged by litep2p (open success/failure), the peer is + /// moved to [`PeerState::Backoff`] from which it will then be moved to + /// [`PeerState::Disconnected`]. + Canceled { + /// Is the peer inbound or outbound. + direction: Direction, + }, + + /// Connection to peer is closing. + /// + /// State implies that the substream was asked to be closed by the local node and litep2p is + /// closing the substream. No command modifying the connection state is accepted until the + /// state has been set to [`PeerState::Disconnected`]. + Closing { + /// Is the peer inbound or outbound. + direction: Direction, + }, +} + +/// `Peerset` implementation. +/// +/// `Peerset` allows other subsystems of the blockchain to modify the connection state +/// of the notification protocol by adding and removing reserved peers. +/// +/// `Peerset` is also responsible for maintaining the desired amount of peers the protocol is +/// connected to by establishing outbound connections and accepting/rejecting inbound connections. +#[derive(Debug)] +pub struct Peerset { + /// Protocol name. + protocol: ProtocolName, + + /// RX channel for receiving commands. + cmd_rx: TracingUnboundedReceiver, + + /// Maximum number of outbound peers. + max_out: usize, + + /// Current number of outbound peers. + num_out: usize, + + /// Maximum number of inbound peers. + max_in: usize, + + /// Current number of inbound peers. + num_in: usize, + + /// Only connect to/accept connections from reserved peers. + reserved_only: bool, + + /// Current reserved peer set. + reserved_peers: HashSet, + + /// Handle to `Peerstore`. + peerstore_handle: Arc, + + /// Peers. + peers: HashMap, + + /// Counter connected peers. + connected_peers: Arc, + + /// Pending backoffs for peers who recently disconnected. + pending_backoffs: FuturesUnordered>, + + /// Next time when [`Peerset`] should perform slot allocation. + next_slot_allocation: Delay, +} + +macro_rules! decrement_or_warn { + ($slot:expr, $protocol:expr, $peer:expr, $direction:expr) => {{ + match $slot.checked_sub(1) { + Some(value) => { + $slot = value; + } + None => { + log::warn!( + target: LOG_TARGET, + "{}: state mismatch, {:?} is not counted as part of {:?} slots", + $protocol, $peer, $direction + ); + debug_assert!(false); + } + } + }}; +} + +/// Handle to [`Peerset`], given to `Peerstore`. +#[derive(Debug)] +struct PeersetHandle { + /// TX channel for sending commands to [`Peerset`]. + tx: TracingUnboundedSender, +} + +impl ProtocolHandle for PeersetHandle { + /// Disconnect peer, as a result of a ban. + fn disconnect_peer(&self, peer: PeerId) { + let _ = self.tx.unbounded_send(PeersetCommand::DisconnectPeer { peer }); + } +} + +impl Peerset { + /// Create new [`Peerset`]. + pub fn new( + protocol: ProtocolName, + max_out: usize, + max_in: usize, + reserved_only: bool, + reserved_peers: HashSet, + connected_peers: Arc, + peerstore_handle: Arc, + ) -> (Self, TracingUnboundedSender) { + let (cmd_tx, cmd_rx) = tracing_unbounded("mpsc-peerset-protocol", 100_000); + let peers = reserved_peers + .iter() + .map(|peer| (*peer, PeerState::Disconnected)) + .collect::>(); + + // register protocol's command channel to `Peerstore` so it can issue disconnect commands + // if some connected peer gets banned. + peerstore_handle.register_protocol(Arc::new(PeersetHandle { tx: cmd_tx.clone() })); + + log::debug!( + target: LOG_TARGET, + "{}: creating new peerset with max_outbound {} and max_inbound {} and reserved_only {}", + protocol, + max_out, + max_in, + reserved_only, + ); + + ( + Self { + protocol, + max_out, + num_out: 0usize, + max_in, + num_in: 0usize, + reserved_peers, + cmd_rx, + peerstore_handle, + reserved_only, + peers, + connected_peers, + pending_backoffs: FuturesUnordered::new(), + next_slot_allocation: Delay::new(SLOT_ALLOCATION_FREQUENCY), + }, + cmd_tx, + ) + } + + /// Report to [`Peerset`] that a substream was opened. + /// + /// Slot for the stream was "preallocated" when it was initiated (outbound) or accepted + /// (inbound) by the local node which is why this function doesn't allocate a slot for the peer. + /// + /// Returns `true` if the substream should be kept open and `false` if the substream had been + /// canceled while it was opening and litep2p should close the substream. + pub fn report_substream_opened( + &mut self, + peer: PeerId, + direction: traits::Direction, + ) -> OpenResult { + log::trace!( + target: LOG_TARGET, + "{}: substream opened to {peer:?}, direction {direction:?}, reserved peer {}", + self.protocol, + self.reserved_peers.contains(&peer), + ); + + let Some(state) = self.peers.get_mut(&peer) else { + log::warn!(target: LOG_TARGET, "{}: substream opened for unknown peer {peer:?}", self.protocol); + debug_assert!(false); + return OpenResult::Reject + }; + + match state { + PeerState::Opening { direction: substream_direction } => { + let real_direction: traits::Direction = (*substream_direction).into(); + + *state = PeerState::Connected { direction: *substream_direction }; + self.connected_peers.fetch_add(1usize, Ordering::Relaxed); + + return OpenResult::Accept { direction: real_direction } + }, + // litep2p doesn't support the ability to cancel an opening substream so if the + // substream was closed while it was opening, it was marked as canceled and if the + // substream opens succesfully, it will be closed + PeerState::Canceled { direction: substream_direction } => { + log::trace!( + target: LOG_TARGET, + "{}: substream to {peer:?} is canceled, issue disconnection request", + self.protocol, + ); + + self.connected_peers.fetch_add(1usize, Ordering::Relaxed); + *state = PeerState::Closing { direction: *substream_direction }; + + return OpenResult::Reject + }, + // The peer was already rejected by the `report_inbound_substream` call and this + // should never happen. However, this code path is exercised by our fuzzer. + PeerState::Disconnected => { + log::debug!( + target: LOG_TARGET, + "{}: substream opened for a peer that was previously rejected {peer:?}", + self.protocol, + ); + return OpenResult::Reject + }, + state => { + log::error!( + target: LOG_TARGET, + "{}: substream opened for a peer in invalid state {peer:?}: {state:?}", + self.protocol, + ); + + debug_assert!(false); + return OpenResult::Reject; + }, + } + } + + /// Report to [`Peerset`] that a substream was closed. + /// + /// If the peer was not a reserved peer, the inbound/outbound slot count is adjusted to account + /// for the disconnected peer. After the connection is closed, the peer is chilled for a + /// duration of [`DEFAULT_BACKOFF`] which prevens [`Peerset`] from establishing/accepting new + /// connections for that time period. + pub fn report_substream_closed(&mut self, peer: PeerId) { + log::trace!(target: LOG_TARGET, "{}: substream closed to {peer:?}", self.protocol); + + let Some(state) = self.peers.get_mut(&peer) else { + log::warn!(target: LOG_TARGET, "{}: substream closed for unknown peer {peer:?}", self.protocol); + debug_assert!(false); + return + }; + + match &state { + // close was initiated either by remote ([`PeerState::Connected`]) or local node + // ([`PeerState::Closing`]) and it was a non-reserved peer + PeerState::Connected { direction: Direction::Inbound(Reserved::No) } | + PeerState::Closing { direction: Direction::Inbound(Reserved::No) } => { + log::trace!( + target: LOG_TARGET, + "{}: inbound substream closed to non-reserved peer {peer:?}: {state:?}", + self.protocol, + ); + + decrement_or_warn!( + self.num_in, + peer, + self.protocol, + Direction::Inbound(Reserved::No) + ); + }, + // close was initiated either by remote ([`PeerState::Connected`]) or local node + // ([`PeerState::Closing`]) and it was a non-reserved peer + PeerState::Connected { direction: Direction::Outbound(Reserved::No) } | + PeerState::Closing { direction: Direction::Outbound(Reserved::No) } => { + log::trace!( + target: LOG_TARGET, + "{}: outbound substream closed to non-reserved peer {peer:?} {state:?}", + self.protocol, + ); + + decrement_or_warn!( + self.num_out, + peer, + self.protocol, + Direction::Outbound(Reserved::No) + ); + }, + // reserved peers don't require adjustments to slot counts + PeerState::Closing { .. } | PeerState::Connected { .. } => { + log::debug!(target: LOG_TARGET, "{}: reserved peer {peer:?} disconnected", self.protocol); + }, + // The peer was already rejected by the `report_inbound_substream` call and this + // should never happen. However, this code path is exercised by our fuzzer. + PeerState::Disconnected => { + log::debug!( + target: LOG_TARGET, + "{}: substream closed for a peer that was previously rejected {peer:?}", + self.protocol, + ); + }, + state => { + log::warn!(target: LOG_TARGET, "{}: invalid state for disconnected peer {peer:?}: {state:?}", self.protocol); + debug_assert!(false); + }, + } + + // Rejected peers do not count towards slot allocation. + if !matches!(state, PeerState::Disconnected) { + self.connected_peers.fetch_sub(1usize, Ordering::Relaxed); + } + + *state = PeerState::Backoff; + self.pending_backoffs.push(Box::pin(async move { + Delay::new(DEFAULT_BACKOFF).await; + (peer, DISCONNECT_ADJUSTMENT) + })); + } + + /// Report to [`Peerset`] that an inbound substream was opened and that it should validate it. + pub fn report_inbound_substream(&mut self, peer: PeerId) -> ValidationResult { + log::trace!(target: LOG_TARGET, "{}: inbound substream from {peer:?}", self.protocol); + + if self.peerstore_handle.is_banned(&peer) { + log::debug!( + target: LOG_TARGET, + "{}: rejecting banned peer {peer:?}", + self.protocol, + ); + + return ValidationResult::Reject; + } + + let state = self.peers.entry(peer).or_insert(PeerState::Disconnected); + let is_reserved_peer = self.reserved_peers.contains(&peer); + + // Check if this is a non-reserved peer and if the protocol is in reserved-only mode. + let should_reject = self.reserved_only && !is_reserved_peer; + + match state { + // disconnected peers that are reserved-only peers are rejected + PeerState::Disconnected if should_reject => { + log::trace!( + target: LOG_TARGET, + "{}: rejecting non-reserved peer {peer:?} in reserved-only mode (prev state: {state:?})", + self.protocol, + ); + + return ValidationResult::Reject + }, + // disconnected peers proceed directly to inbound slot allocation + PeerState::Disconnected => {}, + // peer is backed off but if it can be accepted (either a reserved peer or inbound slot + // available), accept the peer and then just ignore the back-off timer when it expires + PeerState::Backoff => { + if !is_reserved_peer && self.num_in == self.max_in { + log::trace!( + target: LOG_TARGET, + "{}: ({peer:?}) is backed-off and cannot accept, reject inbound substream", + self.protocol, + ); + + return ValidationResult::Reject + } + + // The peer remains in the `PeerState::Backoff` state until the current timer + // expires. Then, the peer will be in the disconnected state, subject to further + // rejection if the peer is not reserved by then. + if should_reject { + return ValidationResult::Reject + } + }, + + // `Peerset` had initiated an outbound substream but litep2p had received an inbound + // substream before the command to open the substream was received, meaning local and + // remote desired to open a connection at the same time. Since outbound substreams + // cannot be canceled with litep2p and the command has already been registered, accept + // the inbound peer since the local node had wished a connection to be opened either way + // but keep the direction of the substream as it was (outbound). + // + // litep2p doesn't care what `Peerset` considers the substream direction to be and since + // it's used for bookkeeping for substream counts, keeping the substream direction + // unmodified simplies the implementation a lot. The direction would otherwise be + // irrelevant for protocols but because `SyncingEngine` has a hack to reject excess + // inbound substreams, that system has to be kept working for the time being. Once that + // issue is fixed, this approach can be re-evaluated if need be. + PeerState::Opening { direction: Direction::Outbound(reserved) } => { + if should_reject { + log::trace!( + target: LOG_TARGET, + "{}: rejecting inbound substream from {peer:?} ({reserved:?}) in reserved-only mode that was marked outbound", + self.protocol, + ); + + *state = PeerState::Canceled { direction: Direction::Outbound(*reserved) }; + return ValidationResult::Reject + } + + log::trace!( + target: LOG_TARGET, + "{}: inbound substream received for {peer:?} ({reserved:?}) that was marked outbound", + self.protocol, + ); + + return ValidationResult::Accept; + }, + PeerState::Canceled { direction } => { + log::trace!( + target: LOG_TARGET, + "{}: {peer:?} is canceled, rejecting substream should_reject={should_reject}", + self.protocol, + ); + + *state = PeerState::Canceled { direction: *direction }; + return ValidationResult::Reject + }, + state => { + log::warn!( + target: LOG_TARGET, + "{}: invalid state ({state:?}) for inbound substream, peer {peer:?}", + self.protocol + ); + debug_assert!(false); + return ValidationResult::Reject + }, + } + + if is_reserved_peer { + log::trace!( + target: LOG_TARGET, + "{}: {peer:?} accepting peer as reserved peer", + self.protocol, + ); + + *state = PeerState::Opening { direction: Direction::Inbound(is_reserved_peer.into()) }; + return ValidationResult::Accept + } + + if self.num_in < self.max_in { + log::trace!( + target: LOG_TARGET, + "{}: {peer:?} accepting peer as regular peer", + self.protocol, + ); + + self.num_in += 1; + + *state = PeerState::Opening { direction: Direction::Inbound(is_reserved_peer.into()) }; + return ValidationResult::Accept + } + + log::trace!( + target: LOG_TARGET, + "{}: reject {peer:?}, not a reserved peer and no free inbound slots", + self.protocol, + ); + + *state = PeerState::Disconnected; + return ValidationResult::Reject + } + + /// Report to [`Peerset`] that there was an error opening a substream. + pub fn report_substream_open_failure(&mut self, peer: PeerId, error: NotificationError) { + log::trace!( + target: LOG_TARGET, + "{}: failed to open substream to {peer:?}: {error:?}", + self.protocol, + ); + + match self.peers.get(&peer) { + Some(PeerState::Opening { direction: Direction::Outbound(Reserved::No) }) => { + decrement_or_warn!( + self.num_out, + self.protocol, + peer, + Direction::Outbound(Reserved::No) + ); + }, + Some(PeerState::Opening { direction: Direction::Inbound(Reserved::No) }) => { + decrement_or_warn!( + self.num_in, + self.protocol, + peer, + Direction::Inbound(Reserved::No) + ); + }, + Some(PeerState::Canceled { direction }) => match direction { + Direction::Inbound(Reserved::No) => { + decrement_or_warn!( + self.num_in, + self.protocol, + peer, + Direction::Inbound(Reserved::No) + ); + }, + Direction::Outbound(Reserved::No) => { + decrement_or_warn!( + self.num_out, + self.protocol, + peer, + Direction::Outbound(Reserved::No) + ); + }, + _ => {}, + }, + // reserved peers do not require change in the slot counts + Some(PeerState::Opening { direction: Direction::Inbound(Reserved::Yes) }) | + Some(PeerState::Opening { direction: Direction::Outbound(Reserved::Yes) }) => { + log::debug!( + target: LOG_TARGET, + "{}: substream open failure for reserved peer {peer:?}", + self.protocol, + ); + }, + state => { + log::debug!( + target: LOG_TARGET, + "{}: substream open failure for a unknown state: {state:?}", + self.protocol, + ); + + return; + }, + } + + self.peers.insert(peer, PeerState::Backoff); + self.pending_backoffs.push(Box::pin(async move { + Delay::new(OPEN_FAILURE_BACKOFF).await; + (peer, OPEN_FAILURE_ADJUSTMENT) + })); + } + + /// [`Peerset`] had accepted a peer but it was then rejected by the protocol. + pub fn report_substream_rejected(&mut self, peer: PeerId) { + log::trace!(target: LOG_TARGET, "{}: {peer:?} rejected by the protocol", self.protocol); + + match self.peers.remove(&peer) { + Some(PeerState::Opening { direction }) => match direction { + Direction::Inbound(Reserved::Yes) | Direction::Outbound(Reserved::Yes) => { + log::warn!( + target: LOG_TARGET, + "{}: reserved peer {peer:?} rejected by the protocol", + self.protocol, + ); + self.peers.insert(peer, PeerState::Disconnected); + }, + Direction::Inbound(Reserved::No) => { + decrement_or_warn!( + self.num_in, + peer, + self.protocol, + Direction::Inbound(Reserved::No) + ); + self.peers.insert(peer, PeerState::Disconnected); + }, + Direction::Outbound(Reserved::No) => { + decrement_or_warn!( + self.num_out, + peer, + self.protocol, + Direction::Outbound(Reserved::No) + ); + self.peers.insert(peer, PeerState::Disconnected); + }, + }, + Some(state @ PeerState::Canceled { .. }) => { + log::debug!( + target: LOG_TARGET, + "{}: substream to {peer:?} rejected by protocol but already canceled", + self.protocol, + ); + + self.peers.insert(peer, state); + }, + Some(state) => { + log::debug!( + target: LOG_TARGET, + "{}: {peer:?} rejected by the protocol but not opening anymore: {state:?}", + self.protocol, + ); + + self.peers.insert(peer, state); + }, + None => {}, + } + } + + /// Calculate how many of the connected peers were counted as normal inbound/outbound peers + /// which is needed to adjust slot counts when new reserved peers are added. + /// + /// If the peer is not already in the [`Peerset`], it is added as a disconnected peer. + fn calculate_slot_adjustment<'a>( + &'a mut self, + peers: impl Iterator, + ) -> (usize, usize) { + peers.fold((0, 0), |(mut inbound, mut outbound), peer| { + match self.peers.get_mut(peer) { + Some(PeerState::Disconnected | PeerState::Backoff) => {}, + Some( + PeerState::Opening { ref mut direction } | + PeerState::Connected { ref mut direction } | + PeerState::Canceled { ref mut direction } | + PeerState::Closing { ref mut direction }, + ) => { + *direction = match direction { + Direction::Inbound(Reserved::No) => { + inbound += 1; + Direction::Inbound(Reserved::Yes) + }, + Direction::Outbound(Reserved::No) => { + outbound += 1; + Direction::Outbound(Reserved::Yes) + }, + ref direction => **direction, + }; + }, + None => { + self.peers.insert(*peer, PeerState::Disconnected); + }, + } + + (inbound, outbound) + }) + } + + /// Checks if the peer should be disconnected based on the current state of the [`Peerset`] + /// and the provided direction. + /// + /// Note: The role of the peer is not checked. + fn should_disconnect(&self, direction: Direction) -> bool { + match direction { + Direction::Inbound(_) => self.num_in >= self.max_in, + Direction::Outbound(_) => self.num_out >= self.max_out, + } + } + + /// Increment the slot count for given peer. + fn increment_slot(&mut self, direction: Direction) { + match direction { + Direction::Inbound(Reserved::No) => self.num_in += 1, + Direction::Outbound(Reserved::No) => self.num_out += 1, + _ => {}, + } + } + + /// Get the number of inbound peers. + #[cfg(test)] + pub fn num_in(&self) -> usize { + self.num_in + } + + /// Get the number of outbound peers. + #[cfg(test)] + pub fn num_out(&self) -> usize { + self.num_out + } + + /// Get reference to known peers. + #[cfg(test)] + pub fn peers(&self) -> &HashMap { + &self.peers + } + + /// Get reference to known peers. + #[cfg(test)] + pub fn peers_mut(&mut self) -> &mut HashMap { + &mut self.peers + } + + /// Get reference to reserved peers. + #[cfg(test)] + pub fn reserved_peers(&self) -> &HashSet { + &self.reserved_peers + } +} + +impl Stream for Peerset { + type Item = PeersetNotificationCommand; + + fn poll_next(mut self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll> { + while let Poll::Ready(Some((peer, reputation))) = self.pending_backoffs.poll_next_unpin(cx) + { + log::trace!(target: LOG_TARGET, "{}: backoff expired for {peer:?}", self.protocol); + + if std::matches!(self.peers.get(&peer), None | Some(PeerState::Backoff)) { + self.peers.insert(peer, PeerState::Disconnected); + } + + self.peerstore_handle.report_peer(peer, reputation); + } + + if let Poll::Ready(Some(action)) = Pin::new(&mut self.cmd_rx).poll_next(cx) { + log::trace!(target: LOG_TARGET, "{}: received command {action:?}", self.protocol); + + match action { + PeersetCommand::DisconnectPeer { peer } if !self.reserved_peers.contains(&peer) => + match self.peers.remove(&peer) { + Some(PeerState::Connected { direction }) => { + log::trace!( + target: LOG_TARGET, + "{}: close connection to {peer:?}, direction {direction:?}", + self.protocol, + ); + + self.peers.insert(peer, PeerState::Closing { direction }); + return Poll::Ready(Some(PeersetNotificationCommand::CloseSubstream { + peers: vec![peer], + })) + }, + Some(PeerState::Backoff) => { + log::trace!( + target: LOG_TARGET, + "{}: cannot disconnect {peer:?}, already backed-off", + self.protocol, + ); + + self.peers.insert(peer, PeerState::Backoff); + }, + // substream might have been opening but not yet fully open when the + // protocol or `Peerstore` request the connection to be closed + // + // if the substream opens successfully, close it immediately and mark the + // peer as `Disconnected` + Some(PeerState::Opening { direction }) => { + log::trace!( + target: LOG_TARGET, + "{}: canceling substream to disconnect peer {peer:?}", + self.protocol, + ); + + self.peers.insert(peer, PeerState::Canceled { direction }); + }, + // protocol had issued two disconnection requests in rapid succession and + // the substream hadn't closed before the second disconnection request was + // received, this is harmless and can be ignored. + Some(state @ PeerState::Closing { .. }) => { + log::trace!( + target: LOG_TARGET, + "{}: cannot disconnect {peer:?}, already closing ({state:?})", + self.protocol, + ); + + self.peers.insert(peer, state); + }, + // if peer is banned, e.g. due to genesis mismatch, `Peerstore` will issue a + // global disconnection request to all protocols, irrespective of the + // connectivity state. Peer isn't necessarily connected to all protocols at + // all times so this is a harmless state to be in if a disconnection request + // is received. + Some(state @ PeerState::Disconnected) => { + self.peers.insert(peer, state); + }, + // peer had an opening substream earlier which was canceled and then, + // e.g., the peer was banned which caused it to be disconnected again + Some(state @ PeerState::Canceled { .. }) => { + log::debug!( + target: LOG_TARGET, + "{}: cannot disconnect {peer:?}, already canceled ({state:?})", + self.protocol, + ); + + self.peers.insert(peer, state); + }, + // peer doesn't exist + // + // this can happen, for example, when peer connects over + // `/block-announces/1` and it has wrong genesis hash which initiates a ban + // for that peer. Since the ban is reported to all protocols but the peer + // mightn't have been registered to GRANDPA or transactions yet, the peer + // doesn't exist in their `Peerset`s and the error can just be ignored. + None => { + log::debug!(target: LOG_TARGET, "{}: {peer:?} doesn't exist", self.protocol); + }, + }, + PeersetCommand::DisconnectPeer { peer } => { + log::debug!( + target: LOG_TARGET, + "{}: ignoring disconnection request for reserved peer {peer}", + self.protocol, + ); + }, + // set new reserved peers for the protocol + // + // Current reserved peers not in the new set are moved to the regular set of peers + // or disconnected (if there are no slots available). The new reserved peers are + // scheduled for outbound substreams + PeersetCommand::SetReservedPeers { peers } => { + log::debug!(target: LOG_TARGET, "{}: set reserved peers {peers:?}", self.protocol); + + // reserved peers don't consume any slots so if there are any regular connected + // peers, inbound/outbound slot count must be adjusted to not account for these + // peers anymore + // + // calculate how many of the previously connected peers were counted as regular + // peers and substract these counts from `num_out`/`num_in` + // + // If a reserved peer is not already tracked, it is added as disconnected by + // `calculate_slot_adjustment`. This ensures at the next slot allocation (1sec) + // that we'll try to establish a connection with the reserved peer. + let (in_peers, out_peers) = self.calculate_slot_adjustment(peers.iter()); + self.num_out -= out_peers; + self.num_in -= in_peers; + + // collect all *reserved* peers who are not in the new reserved set + let reserved_peers_maybe_remove = + self.reserved_peers.difference(&peers).cloned().collect::>(); + + self.reserved_peers = peers; + + let peers_to_remove = reserved_peers_maybe_remove + .into_iter() + .filter(|peer| { + match self.peers.remove(&peer) { + Some(PeerState::Connected { mut direction }) => { + // The direction contains a `Reserved::Yes` flag, because this + // is a reserve peer that we want to close. + // The `Reserved::Yes` ensures we don't adjust the slot count + // when the substream is closed. + + let disconnect = + self.reserved_only || self.should_disconnect(direction); + + if disconnect { + log::trace!( + target: LOG_TARGET, + "{}: close connection to previously reserved {peer:?}, direction {direction:?}", + self.protocol, + ); + + self.peers.insert(*peer, PeerState::Closing { direction }); + true + } else { + log::trace!( + target: LOG_TARGET, + "{}: {peer:?} is no longer reserved, move to regular peers, direction {direction:?}", + self.protocol, + ); + + // The peer is kept connected as non-reserved. This will + // further count towards the slot count. + direction.set_reserved(Reserved::No); + self.increment_slot(direction); + + self.peers + .insert(*peer, PeerState::Connected { direction }); + false + } + }, + // substream might have been opening but not yet fully open when + // the protocol request the reserved set to be changed + Some(PeerState::Opening { direction }) => { + log::trace!( + target: LOG_TARGET, + "{}: cancel substream to {peer:?}, direction {direction:?}", + self.protocol, + ); + + self.peers.insert(*peer, PeerState::Canceled { direction }); + false + }, + Some(state) => { + self.peers.insert(*peer, state); + false + }, + None => { + log::debug!(target: LOG_TARGET, "{}: {peer:?} doesn't exist", self.protocol); + debug_assert!(false); + false + }, + } + }) + .collect(); + + log::trace!( + target: LOG_TARGET, + "{}: close substreams to {peers_to_remove:?}", + self.protocol, + ); + + return Poll::Ready(Some(PeersetNotificationCommand::CloseSubstream { + peers: peers_to_remove, + })) + }, + PeersetCommand::AddReservedPeers { peers } => { + log::debug!(target: LOG_TARGET, "{}: add reserved peers {peers:?}", self.protocol); + + // reserved peers don't consume any slots so if there are any regular connected + // peers, inbound/outbound slot count must be adjusted to not account for these + // peers anymore + // + // calculate how many of the previously connected peers were counted as regular + // peers and substract these counts from `num_out`/`num_in` + let (in_peers, out_peers) = self.calculate_slot_adjustment(peers.iter()); + self.num_out -= out_peers; + self.num_in -= in_peers; + + let peers = peers + .iter() + .filter_map(|peer| { + if !self.reserved_peers.insert(*peer) { + log::warn!( + target: LOG_TARGET, + "{}: {peer:?} is already a reserved peer", + self.protocol, + ); + return None + } + + std::matches!( + self.peers.get_mut(peer), + None | Some(PeerState::Disconnected) + ) + .then(|| { + self.peers.insert( + *peer, + PeerState::Opening { + direction: Direction::Outbound(Reserved::Yes), + }, + ); + *peer + }) + }) + .collect(); + + log::debug!(target: LOG_TARGET, "{}: start connecting to {peers:?}", self.protocol); + + return Poll::Ready(Some(PeersetNotificationCommand::OpenSubstream { peers })) + }, + PeersetCommand::RemoveReservedPeers { peers } => { + log::debug!(target: LOG_TARGET, "{}: remove reserved peers {peers:?}", self.protocol); + + let peers_to_remove = peers + .iter() + .filter_map(|peer| { + if !self.reserved_peers.remove(peer) { + log::debug!( + target: LOG_TARGET, + "{}: {peer} is not a reserved peer", + self.protocol, + ); + return None + } + + match self.peers.remove(peer)? { + // peer might have already disconnected by the time request to + // disconnect them was received and the peer was backed off but + // it had no expired by the time the request to disconnect the + // peer was received + PeerState::Backoff => { + log::trace!( + target: LOG_TARGET, + "{}: cannot disconnect removed reserved peer {peer:?}, already backed-off", + self.protocol, + ); + + self.peers.insert(*peer, PeerState::Backoff); + None + }, + + // if there is a rapid change in substream state, the peer may + // be canceled when the substream is asked to be closed. + // + // this can happen if substream is first opened and the very + // soon after canceled. The substream may not have had time to + // open yet and second open is ignored. If the substream is now + // closed again before it has had time to open, it will be in + // canceled state since `Peerset` is still waiting to hear + // either success/failure on the original substream it tried to + // cancel. + PeerState::Canceled { direction } => { + log::trace!( + target: LOG_TARGET, + "{}: cannot disconnect removed reserved peer {peer:?}, already canceled", + self.protocol, + ); + + self.peers.insert(*peer, PeerState::Canceled { direction }); + None + }, + + // substream to the peer might have failed to open which caused + // the peer to be backed off + // + // the back-off might've expired by the time the peer was + // disconnected at which point the peer is already disconnected + // when the protocol asked the peer to be disconnected + PeerState::Disconnected => { + log::trace!( + target: LOG_TARGET, + "{}: cannot disconnect removed reserved peer {peer:?}, already disconnected", + self.protocol, + ); + + self.peers.insert(*peer, PeerState::Disconnected); + None + }, + + // if a node disconnects, it's put into `PeerState::Closing` + // which indicates that `Peerset` wants the substream closed and + // has asked litep2p to close it but it hasn't yet received a + // confirmation. If the peer is added as a reserved peer while + // the substream is closing, the peer will remain in the closing + // state as `Peerset` can't do anything with the peer until it + // has heard from litep2p. It's possible that the peer is then + // removed from the reserved set before substream close event + // has been reported to `Peerset` (which the code below is + // handling) and it will once again be ignored until the close + // event is heard from litep2p. + PeerState::Closing { direction } => { + log::trace!( + target: LOG_TARGET, + "{}: cannot disconnect removed reserved peer {peer:?}, already closing", + self.protocol, + ); + + self.peers.insert(*peer, PeerState::Closing { direction }); + None + }, + // peer is currently connected as a reserved peer + // + // check if the peer can be accepted as a regular peer based on its + // substream direction and available slots + // + // if there are enough slots, the peer is just converted to + // a regular peer and the used slot count is increased and if the + // peer cannot be accepted, litep2p is asked to close the substream. + PeerState::Connected { mut direction } => { + let disconnect = self.should_disconnect(direction); + + if disconnect { + log::trace!( + target: LOG_TARGET, + "{}: close connection to removed reserved {peer:?}, direction {direction:?}", + self.protocol, + ); + + self.peers.insert(*peer, PeerState::Closing { direction }); + Some(*peer) + } else { + log::trace!( + target: LOG_TARGET, + "{}: {peer:?} converted to regular peer {peer:?} direction {direction:?}", + self.protocol, + ); + + // The peer is kept connected as non-reserved. This will + // further count towards the slot count. + direction.set_reserved(Reserved::No); + self.increment_slot(direction); + + self.peers + .insert(*peer, PeerState::Connected { direction }); + + None + } + }, + + PeerState::Opening { mut direction } => { + let disconnect = self.should_disconnect(direction); + + if disconnect { + log::trace!( + target: LOG_TARGET, + "{}: cancel substream to disconnect removed reserved peer {peer:?}, direction {direction:?}", + self.protocol, + ); + + self.peers.insert( + *peer, + PeerState::Canceled { + direction + }, + ); + } else { + log::trace!( + target: LOG_TARGET, + "{}: {peer:?} converted to regular peer {peer:?} direction {direction:?}", + self.protocol, + ); + + // The peer is kept connected as non-reserved. This will + // further count towards the slot count. + direction.set_reserved(Reserved::No); + self.increment_slot(direction); + + self.peers + .insert(*peer, PeerState::Opening { direction }); + } + + None + }, + } + }) + .collect(); + + log::debug!( + target: LOG_TARGET, + "{}: close substreams to {peers_to_remove:?}", + self.protocol, + ); + + return Poll::Ready(Some(PeersetNotificationCommand::CloseSubstream { + peers: peers_to_remove, + })) + }, + PeersetCommand::SetReservedOnly { reserved_only } => { + log::debug!(target: LOG_TARGET, "{}: set reserved only mode to {reserved_only}", self.protocol); + + // update mode and if it's set to true, disconnect all non-reserved peers + self.reserved_only = reserved_only; + + if reserved_only { + let peers_to_remove = self + .peers + .iter() + .filter_map(|(peer, state)| { + (!self.reserved_peers.contains(peer) && + std::matches!(state, PeerState::Connected { .. })) + .then_some(*peer) + }) + .collect::>(); + + // set peers to correct states + + // peers who are connected are move to [`PeerState::Closing`] + // and peers who are already opening are moved to [`PeerState::Canceled`] + // and if the substream for them opens, it will be closed right after. + self.peers.iter_mut().for_each(|(_, state)| match state { + PeerState::Connected { direction } => { + *state = PeerState::Closing { direction: *direction }; + }, + // peer for whom a substream was opening are canceled and if the + // substream opens successfully, it will be closed immediately + PeerState::Opening { direction } => { + *state = PeerState::Canceled { direction: *direction }; + }, + _ => {}, + }); + + return Poll::Ready(Some(PeersetNotificationCommand::CloseSubstream { + peers: peers_to_remove, + })) + } + }, + PeersetCommand::GetReservedPeers { tx } => { + let _ = tx.send(self.reserved_peers.iter().cloned().collect()); + }, + } + } + + // periodically check if `Peerset` is currently not connected to some reserved peers + // it should be connected to + // + // also check if there are free outbound slots and if so, fetch peers with highest + // reputations from `Peerstore` and start opening substreams to these peers + if let Poll::Ready(()) = Pin::new(&mut self.next_slot_allocation).poll(cx) { + let mut connect_to = self + .peers + .iter() + .filter_map(|(peer, state)| { + (self.reserved_peers.contains(peer) && + std::matches!(state, PeerState::Disconnected) && + !self.peerstore_handle.is_banned(peer)) + .then_some(*peer) + }) + .collect::>(); + + connect_to.iter().for_each(|peer| { + self.peers.insert( + *peer, + PeerState::Opening { direction: Direction::Outbound(Reserved::Yes) }, + ); + }); + + // if the number of outbound peers is lower than the desired amount of outbound peers, + // query `PeerStore` and try to get a new outbound candidated. + if self.num_out < self.max_out && !self.reserved_only { + // From the candidates offered by the peerstore we need to ignore: + // - all peers that are not in the `PeerState::Disconnected` state (ie they are + // connected / closing) + // - reserved peers since we initiated a connection to them in the previous step + let ignore: HashSet = self + .peers + .iter() + .filter_map(|(peer, state)| { + (!std::matches!(state, PeerState::Disconnected)).then_some(*peer) + }) + .chain(self.reserved_peers.iter().cloned()) + .collect(); + + let peers: Vec<_> = + self.peerstore_handle.outgoing_candidates(self.max_out - self.num_out, ignore); + + if peers.len() > 0 { + peers.iter().for_each(|peer| { + self.peers.insert( + *peer, + PeerState::Opening { direction: Direction::Outbound(Reserved::No) }, + ); + }); + + self.num_out += peers.len(); + connect_to.extend(peers); + } + } + + // start timer for the next allocation and if there were peers which the `Peerset` + // wasn't connected but should be, send command to litep2p to start opening substreams. + self.next_slot_allocation = Delay::new(SLOT_ALLOCATION_FREQUENCY); + + if !connect_to.is_empty() { + log::trace!( + target: LOG_TARGET, + "{}: start connecting to peers {connect_to:?}", + self.protocol, + ); + + return Poll::Ready(Some(PeersetNotificationCommand::OpenSubstream { + peers: connect_to, + })) + } + } + + Poll::Pending + } +} diff --git a/client/network/src/litep2p/shim/notification/tests/fuzz.rs b/client/network/src/litep2p/shim/notification/tests/fuzz.rs new file mode 100644 index 00000000..8967caa4 --- /dev/null +++ b/client/network/src/litep2p/shim/notification/tests/fuzz.rs @@ -0,0 +1,384 @@ +// This file is part of Substrate. + +// Copyright (C) Parity Technologies (UK) Ltd. +// SPDX-License-Identifier: GPL-3.0-or-later WITH Classpath-exception-2.0 + +// This program is free software: you can redistribute it and/or modify +// it under the terms of the GNU General Public License as published by +// the Free Software Foundation, either version 3 of the License, or +// (at your option) any later version. + +// This program is distributed in the hope that it will be useful, +// but WITHOUT ANY WARRANTY; without even the implied warranty of +// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +// GNU General Public License for more details. + +// You should have received a copy of the GNU General Public License +// along with this program. If not, see . + +//! Fuzz test emulates network events and peer connection handling by `Peerset` +//! and `PeerStore` to discover possible inconsistencies in peer management. + +use crate::{ + litep2p::{ + peerstore::Peerstore, + shim::notification::peerset::{ + OpenResult, Peerset, PeersetCommand, PeersetNotificationCommand, + }, + }, + service::traits::{Direction, PeerStore, ValidationResult}, + ProtocolName, +}; + +use futures::{FutureExt, StreamExt}; +use litep2p::protocol::notification::NotificationError; +use rand::{ + distributions::{Distribution, Uniform, WeightedIndex}, + seq::IteratorRandom, +}; + +use sc_network_common::types::ReputationChange; +use sc_network_types::PeerId; + +use std::{ + collections::{HashMap, HashSet}, + sync::Arc, +}; + +#[tokio::test] +#[cfg(debug_assertions)] +async fn run() { + sp_tracing::try_init_simple(); + + for _ in 0..50 { + test_once().await; + } +} + +#[cfg(debug_assertions)] +async fn test_once() { + // PRNG to use. + let mut rng = rand::thread_rng(); + + // peers that the peerset knows about. + let mut known_peers = HashSet::::new(); + + // peers that we have reserved. Always a subset of `known_peers`. + let mut reserved_peers = HashSet::::new(); + + // reserved only mode + let mut reserved_only = Uniform::new_inclusive(0, 10).sample(&mut rng) == 0; + + // Bootnodes for `PeerStore` initialization. + let bootnodes = (0..Uniform::new_inclusive(0, 4).sample(&mut rng)) + .map(|_| { + let id = PeerId::random(); + known_peers.insert(id); + id + }) + .collect(); + + let peerstore = Peerstore::new(bootnodes, None); + let peer_store_handle = peerstore.handle(); + + let (mut peerset, to_peerset) = Peerset::new( + ProtocolName::from("/notif/1"), + Uniform::new_inclusive(0, 25).sample(&mut rng), + Uniform::new_inclusive(0, 25).sample(&mut rng), + reserved_only, + (0..Uniform::new_inclusive(0, 2).sample(&mut rng)) + .map(|_| { + let id = PeerId::random(); + known_peers.insert(id); + reserved_peers.insert(id); + id + }) + .collect(), + Default::default(), + Arc::clone(&peer_store_handle), + ); + + tokio::spawn(peerstore.run()); + + // opening substreams + let mut opening = HashMap::::new(); + + // open substreams + let mut open = HashMap::::new(); + + // closing substreams + let mut closing = HashSet::::new(); + + // closed substreams + let mut closed = HashSet::::new(); + + // perform a certain number of actions while checking that the state is consistent. + // + // if we reach the end of the loop, the run has succeeded + let _ = tokio::task::spawn_blocking(move || { + // PRNG to use in `spawn_blocking` context. + let mut rng = rand::thread_rng(); + + for _ in 0..2500 { + // each of these weights corresponds to an action that we may perform + let action_weights = + [300, 110, 110, 110, 110, 90, 70, 30, 110, 110, 110, 110, 20, 110, 50, 110]; + + match WeightedIndex::new(&action_weights).unwrap().sample(&mut rng) { + 0 => match peerset.next().now_or_never() { + // open substreams to `peers` + Some(Some(PeersetNotificationCommand::OpenSubstream { peers })) => + for peer in peers { + opening.insert(peer, Direction::Outbound); + closed.remove(&peer); + + assert!(!closing.contains(&peer)); + assert!(!open.contains_key(&peer)); + }, + // close substreams to `peers` + Some(Some(PeersetNotificationCommand::CloseSubstream { peers })) => + for peer in peers { + assert!(closing.insert(peer)); + assert!(open.remove(&peer).is_some()); + assert!(!opening.contains_key(&peer)); + }, + Some(None) => panic!("peerset exited"), + None => {}, + }, + // get inbound connection from an unknown peer + 1 => { + let new_peer = PeerId::random(); + peer_store_handle.add_known_peer(new_peer); + + match peerset.report_inbound_substream(new_peer) { + ValidationResult::Accept => { + opening.insert(new_peer, Direction::Inbound); + }, + ValidationResult::Reject => {}, + } + }, + // substream opened successfully + // + // remove peer from `opening` (which contains its direction), report the open + // substream to `Peerset` and move peer state to `open`. + // + // if the substream was canceled while it was opening, move peer to `closing` + 2 => + if let Some(peer) = opening.keys().choose(&mut rng).copied() { + let direction = opening.remove(&peer).unwrap(); + match peerset.report_substream_opened(peer, direction) { + OpenResult::Accept { .. } => { + assert!(open.insert(peer, direction).is_none()); + }, + OpenResult::Reject => { + assert!(closing.insert(peer)); + }, + } + }, + // substream failed to open + 3 => + if let Some(peer) = opening.keys().choose(&mut rng).copied() { + let _ = opening.remove(&peer).unwrap(); + peerset.report_substream_open_failure(peer, NotificationError::Rejected); + }, + // substream was closed by remote peer + 4 => + if let Some(peer) = open.keys().choose(&mut rng).copied() { + let _ = open.remove(&peer).unwrap(); + peerset.report_substream_closed(peer); + assert!(closed.insert(peer)); + }, + // substream was closed by local node + 5 => + if let Some(peer) = closing.iter().choose(&mut rng).copied() { + assert!(closing.remove(&peer)); + assert!(closed.insert(peer)); + peerset.report_substream_closed(peer); + }, + // random connected peer was disconnected by the protocol + 6 => + if let Some(peer) = open.keys().choose(&mut rng).copied() { + to_peerset.unbounded_send(PeersetCommand::DisconnectPeer { peer }).unwrap(); + }, + // ban random peer + 7 => + if let Some(peer) = known_peers.iter().choose(&mut rng).copied() { + peer_store_handle.report_peer(peer, ReputationChange::new_fatal("")); + }, + // inbound substream is received for a peer that was considered + // outbound + 8 => { + let outbound_peers = opening + .iter() + .filter_map(|(peer, direction)| { + std::matches!(direction, Direction::Outbound).then_some(*peer) + }) + .collect::>(); + + if let Some(peer) = outbound_peers.iter().choose(&mut rng).copied() { + match peerset.report_inbound_substream(peer) { + ValidationResult::Accept => { + opening.insert(peer, Direction::Inbound); + }, + ValidationResult::Reject => {}, + } + } + }, + // set reserved peers + // + // choose peers from all available sets (open, opening, closing, closed) + some new + // peers + 9 => { + let num_open = Uniform::new_inclusive(0, open.len()).sample(&mut rng); + let num_opening = Uniform::new_inclusive(0, opening.len()).sample(&mut rng); + let num_closing = Uniform::new_inclusive(0, closing.len()).sample(&mut rng); + let num_closed = Uniform::new_inclusive(0, closed.len()).sample(&mut rng); + + let peers = open + .keys() + .copied() + .choose_multiple(&mut rng, num_open) + .into_iter() + .chain( + opening + .keys() + .copied() + .choose_multiple(&mut rng, num_opening) + .into_iter(), + ) + .chain( + closing + .iter() + .copied() + .choose_multiple(&mut rng, num_closing) + .into_iter(), + ) + .chain( + closed + .iter() + .copied() + .choose_multiple(&mut rng, num_closed) + .into_iter(), + ) + .chain((0..5).map(|_| { + let peer = PeerId::random(); + known_peers.insert(peer); + peer_store_handle.add_known_peer(peer); + peer + })) + .filter(|peer| !reserved_peers.contains(peer)) + .collect::>(); + + reserved_peers.extend(peers.clone().into_iter()); + to_peerset.unbounded_send(PeersetCommand::SetReservedPeers { peers }).unwrap(); + }, + // add reserved peers + 10 => { + let num_open = Uniform::new_inclusive(0, open.len()).sample(&mut rng); + let num_opening = Uniform::new_inclusive(0, opening.len()).sample(&mut rng); + let num_closing = Uniform::new_inclusive(0, closing.len()).sample(&mut rng); + let num_closed = Uniform::new_inclusive(0, closed.len()).sample(&mut rng); + + let peers = open + .keys() + .copied() + .choose_multiple(&mut rng, num_open) + .into_iter() + .chain( + opening + .keys() + .copied() + .choose_multiple(&mut rng, num_opening) + .into_iter(), + ) + .chain( + closing + .iter() + .copied() + .choose_multiple(&mut rng, num_closing) + .into_iter(), + ) + .chain( + closed + .iter() + .copied() + .choose_multiple(&mut rng, num_closed) + .into_iter(), + ) + .chain((0..5).map(|_| { + let peer = PeerId::random(); + known_peers.insert(peer); + peer_store_handle.add_known_peer(peer); + peer + })) + .filter(|peer| !reserved_peers.contains(peer)) + .collect::>(); + + reserved_peers.extend(peers.clone().into_iter()); + to_peerset.unbounded_send(PeersetCommand::AddReservedPeers { peers }).unwrap(); + }, + // remove reserved peers + 11 => { + let num_to_remove = + Uniform::new_inclusive(0, reserved_peers.len()).sample(&mut rng); + let peers = reserved_peers + .iter() + .copied() + .choose_multiple(&mut rng, num_to_remove) + .into_iter() + .collect::>(); + + peers.iter().for_each(|peer| { + assert!(reserved_peers.remove(peer)); + }); + + to_peerset + .unbounded_send(PeersetCommand::RemoveReservedPeers { peers }) + .unwrap(); + }, + // set reserved only + 12 => { + reserved_only = !reserved_only; + + let _ = to_peerset + .unbounded_send(PeersetCommand::SetReservedOnly { reserved_only }); + }, + // + // discover a new node. + 13 => { + let new_peer = PeerId::random(); + known_peers.insert(new_peer); + peer_store_handle.add_known_peer(new_peer); + }, + // protocol rejected a substream that was accepted by `Peerset` + 14 => { + let inbound_peers = opening + .iter() + .filter_map(|(peer, direction)| { + std::matches!(direction, Direction::Inbound).then_some(*peer) + }) + .collect::>(); + + if let Some(peer) = inbound_peers.iter().choose(&mut rng).copied() { + peerset.report_substream_rejected(peer); + opening.remove(&peer); + } + }, + // inbound substream received for a peer in `closed` + 15 => + if let Some(peer) = closed.iter().choose(&mut rng).copied() { + match peerset.report_inbound_substream(peer) { + ValidationResult::Accept => { + assert!(closed.remove(&peer)); + opening.insert(peer, Direction::Inbound); + }, + ValidationResult::Reject => {}, + } + }, + _ => unreachable!(), + } + } + }) + .await + .unwrap(); +} diff --git a/client/network/src/litep2p/shim/notification/tests/mod.rs b/client/network/src/litep2p/shim/notification/tests/mod.rs new file mode 100644 index 00000000..a303862e --- /dev/null +++ b/client/network/src/litep2p/shim/notification/tests/mod.rs @@ -0,0 +1,22 @@ +// This file is part of Substrate. + +// Copyright (C) Parity Technologies (UK) Ltd. +// SPDX-License-Identifier: GPL-3.0-or-later WITH Classpath-exception-2.0 + +// This program is free software: you can redistribute it and/or modify +// it under the terms of the GNU General Public License as published by +// the Free Software Foundation, either version 3 of the License, or +// (at your option) any later version. + +// This program is distributed in the hope that it will be useful, +// but WITHOUT ANY WARRANTY; without even the implied warranty of +// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +// GNU General Public License for more details. + +// You should have received a copy of the GNU General Public License +// along with this program. If not, see . + +#[cfg(test)] +mod fuzz; +#[cfg(test)] +mod peerset; diff --git a/client/network/src/litep2p/shim/notification/tests/peerset.rs b/client/network/src/litep2p/shim/notification/tests/peerset.rs new file mode 100644 index 00000000..9ec33268 --- /dev/null +++ b/client/network/src/litep2p/shim/notification/tests/peerset.rs @@ -0,0 +1,1299 @@ +// This file is part of Substrate. + +// Copyright (C) Parity Technologies (UK) Ltd. +// SPDX-License-Identifier: GPL-3.0-or-later WITH Classpath-exception-2.0 + +// This program is free software: you can redistribute it and/or modify +// it under the terms of the GNU General Public License as published by +// the Free Software Foundation, either version 3 of the License, or +// (at your option) any later version. + +// This program is distributed in the hope that it will be useful, +// but WITHOUT ANY WARRANTY; without even the implied warranty of +// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +// GNU General Public License for more details. + +// You should have received a copy of the GNU General Public License +// along with this program. If not, see . + +use crate::{ + litep2p::{ + peerstore::peerstore_handle_test, + shim::notification::peerset::{ + Direction, OpenResult, PeerState, Peerset, PeersetCommand, PeersetNotificationCommand, + Reserved, + }, + }, + service::traits::{self, ValidationResult}, + ProtocolName, +}; + +use futures::prelude::*; +use litep2p::protocol::notification::NotificationError; + +use sc_network_types::PeerId; + +use std::{ + collections::HashSet, + sync::{ + atomic::{AtomicUsize, Ordering}, + Arc, + }, + task::Poll, +}; + +// outbound substream was initiated for a peer but an inbound substream from that same peer +// was receied while the `Peerset` was waiting for the outbound substream to be opened +// +// verify that the peer state is updated correctly +#[tokio::test] +async fn inbound_substream_for_outbound_peer() { + let peerstore_handle = Arc::new(peerstore_handle_test()); + let peers = (0..3) + .map(|_| { + let peer = PeerId::random(); + peerstore_handle.add_known_peer(peer); + peer + }) + .collect::>(); + let inbound_peer = *peers.iter().next().unwrap(); + + let (mut peerset, _to_peerset) = Peerset::new( + ProtocolName::from("/notif/1"), + 25, + 25, + false, + Default::default(), + Default::default(), + peerstore_handle, + ); + assert_eq!(peerset.num_in(), 0usize); + assert_eq!(peerset.num_out(), 0usize); + + match peerset.next().await { + Some(PeersetNotificationCommand::OpenSubstream { peers: out_peers }) => { + assert_eq!(out_peers.len(), 3usize); + assert_eq!(peerset.num_in(), 0usize); + assert_eq!(peerset.num_out(), 3usize); + assert_eq!( + peerset.peers().get(&inbound_peer), + Some(&PeerState::Opening { direction: Direction::Outbound(Reserved::No) }) + ); + }, + event => panic!("invalid event: {event:?}"), + } + + // inbound substream was received from peer who was marked outbound + // + // verify that the peer state and inbound/outbound counts are updated correctly + assert_eq!(peerset.report_inbound_substream(inbound_peer), ValidationResult::Accept); + assert_eq!(peerset.num_in(), 0usize); + assert_eq!(peerset.num_out(), 3usize); + assert_eq!( + peerset.peers().get(&inbound_peer), + Some(&PeerState::Opening { direction: Direction::Outbound(Reserved::No) }) + ); +} + +// substream was opening to peer but then it was canceled and before the substream +// was fully closed, the peer got banned +#[tokio::test] +async fn canceled_peer_gets_banned() { + sp_tracing::try_init_simple(); + + let peerstore_handle = Arc::new(peerstore_handle_test()); + let peers = HashSet::from_iter([PeerId::random(), PeerId::random(), PeerId::random()]); + + let (mut peerset, to_peerset) = Peerset::new( + ProtocolName::from("/notif/1"), + 0, + 0, + true, + peers.clone(), + Default::default(), + peerstore_handle, + ); + assert_eq!(peerset.num_in(), 0usize); + assert_eq!(peerset.num_out(), 0usize); + + match peerset.next().await { + Some(PeersetNotificationCommand::OpenSubstream { peers: out_peers }) => { + assert_eq!(peerset.num_in(), 0usize); + assert_eq!(peerset.num_out(), 0usize); + + for outbound_peer in &out_peers { + assert!(peers.contains(outbound_peer)); + assert_eq!( + peerset.peers().get(&outbound_peer), + Some(&PeerState::Opening { direction: Direction::Outbound(Reserved::Yes) }) + ); + } + }, + event => panic!("invalid event: {event:?}"), + } + + // remove all reserved peers + to_peerset + .unbounded_send(PeersetCommand::RemoveReservedPeers { peers: peers.clone() }) + .unwrap(); + + match peerset.next().await { + Some(PeersetNotificationCommand::CloseSubstream { peers: out_peers }) => { + assert!(out_peers.is_empty()); + }, + event => panic!("invalid event: {event:?}"), + } + + // verify all reserved peers are canceled + for (_, state) in peerset.peers() { + assert_eq!(state, &PeerState::Canceled { direction: Direction::Outbound(Reserved::Yes) }); + } +} + +#[tokio::test] +async fn peer_added_and_removed_from_peerset() { + sp_tracing::try_init_simple(); + + let peerstore_handle = Arc::new(peerstore_handle_test()); + let (mut peerset, to_peerset) = Peerset::new( + ProtocolName::from("/notif/1"), + 0, + 0, + true, + Default::default(), + Default::default(), + peerstore_handle, + ); + assert_eq!(peerset.num_in(), 0usize); + assert_eq!(peerset.num_out(), 0usize); + + // add peers to reserved set + let peers = HashSet::from_iter([PeerId::random(), PeerId::random(), PeerId::random()]); + to_peerset + .unbounded_send(PeersetCommand::AddReservedPeers { peers: peers.clone() }) + .unwrap(); + + match peerset.next().await { + Some(PeersetNotificationCommand::OpenSubstream { peers: out_peers }) => { + assert_eq!(peerset.num_in(), 0usize); + assert_eq!(peerset.num_out(), 0usize); + + for outbound_peer in &out_peers { + assert!(peers.contains(outbound_peer)); + assert!(peerset.reserved_peers().contains(outbound_peer)); + assert_eq!( + peerset.peers().get(&outbound_peer), + Some(&PeerState::Opening { direction: Direction::Outbound(Reserved::Yes) }) + ); + } + }, + event => panic!("invalid event: {event:?}"), + } + + // report that all substreams were opened + for peer in &peers { + assert!(std::matches!( + peerset.report_substream_opened(*peer, traits::Direction::Outbound), + OpenResult::Accept { .. } + )); + assert_eq!( + peerset.peers().get(peer), + Some(&PeerState::Connected { direction: Direction::Outbound(Reserved::Yes) }) + ); + } + + // remove all reserved peers + to_peerset + .unbounded_send(PeersetCommand::RemoveReservedPeers { peers: peers.clone() }) + .unwrap(); + + match peerset.next().await { + Some(PeersetNotificationCommand::CloseSubstream { peers: out_peers }) => { + assert!(!out_peers.is_empty()); + + for peer in &out_peers { + assert!(peers.contains(peer)); + assert!(!peerset.reserved_peers().contains(peer)); + assert_eq!( + peerset.peers().get(peer), + Some(&PeerState::Closing { direction: Direction::Outbound(Reserved::Yes) }), + ); + } + }, + event => panic!("invalid event: {event:?}"), + } + + // add the peers again and verify that the command is ignored because the substreams are closing + to_peerset + .unbounded_send(PeersetCommand::AddReservedPeers { peers: peers.clone() }) + .unwrap(); + + match peerset.next().await { + Some(PeersetNotificationCommand::OpenSubstream { peers: out_peers }) => { + assert!(out_peers.is_empty()); + + for peer in &peers { + assert!(peerset.reserved_peers().contains(peer)); + assert_eq!( + peerset.peers().get(peer), + Some(&PeerState::Closing { direction: Direction::Outbound(Reserved::Yes) }), + ); + } + }, + event => panic!("invalid event: {event:?}"), + } + + // remove the peers again and verify the state remains as `Closing` + to_peerset + .unbounded_send(PeersetCommand::RemoveReservedPeers { peers: peers.clone() }) + .unwrap(); + + match peerset.next().await { + Some(PeersetNotificationCommand::CloseSubstream { peers: out_peers }) => { + assert!(out_peers.is_empty()); + + for peer in &peers { + assert!(!peerset.reserved_peers().contains(peer)); + assert_eq!( + peerset.peers().get(peer), + Some(&PeerState::Closing { direction: Direction::Outbound(Reserved::Yes) }), + ); + } + }, + event => panic!("invalid event: {event:?}"), + } +} + +#[tokio::test] +async fn set_reserved_peers() { + sp_tracing::try_init_simple(); + + let reserved = HashSet::from_iter([PeerId::random(), PeerId::random(), PeerId::random()]); + let (mut peerset, to_peerset) = Peerset::new( + ProtocolName::from("/notif/1"), + 25, + 25, + true, + reserved.clone(), + Default::default(), + Arc::new(peerstore_handle_test()), + ); + assert_eq!(peerset.num_in(), 0usize); + assert_eq!(peerset.num_out(), 0usize); + + match peerset.next().await { + Some(PeersetNotificationCommand::OpenSubstream { peers: out_peers }) => { + assert_eq!(peerset.num_in(), 0usize); + assert_eq!(peerset.num_out(), 0usize); + + for outbound_peer in &out_peers { + assert!(reserved.contains(outbound_peer)); + assert!(peerset.reserved_peers().contains(outbound_peer)); + assert_eq!( + peerset.peers().get(&outbound_peer), + Some(&PeerState::Opening { direction: Direction::Outbound(Reserved::Yes) }) + ); + } + }, + event => panic!("invalid event: {event:?}"), + } + + // report that all substreams were opened + for peer in &reserved { + assert!(std::matches!( + peerset.report_substream_opened(*peer, traits::Direction::Outbound), + OpenResult::Accept { .. } + )); + assert_eq!( + peerset.peers().get(peer), + Some(&PeerState::Connected { direction: Direction::Outbound(Reserved::Yes) }) + ); + } + + // add a totally new set of reserved peers + let new_reserved_peers = + HashSet::from_iter([PeerId::random(), PeerId::random(), PeerId::random()]); + to_peerset + .unbounded_send(PeersetCommand::SetReservedPeers { peers: new_reserved_peers.clone() }) + .unwrap(); + + match peerset.next().await { + Some(PeersetNotificationCommand::CloseSubstream { peers: out_peers }) => { + assert!(!out_peers.is_empty()); + assert_eq!(out_peers.len(), 3); + + for peer in &out_peers { + assert!(reserved.contains(peer)); + assert!(!peerset.reserved_peers().contains(peer)); + assert_eq!( + peerset.peers().get(peer), + Some(&PeerState::Closing { direction: Direction::Outbound(Reserved::Yes) }), + ); + } + + for peer in &new_reserved_peers { + assert!(peerset.reserved_peers().contains(peer)); + } + }, + event => panic!("invalid event: {event:?}"), + } + + match peerset.next().await { + Some(PeersetNotificationCommand::OpenSubstream { peers: out_peers }) => { + assert!(!out_peers.is_empty()); + assert_eq!(out_peers.len(), 3); + + for peer in &new_reserved_peers { + assert!(peerset.reserved_peers().contains(peer)); + assert_eq!( + peerset.peers().get(peer), + Some(&PeerState::Opening { direction: Direction::Outbound(Reserved::Yes) }), + ); + } + }, + event => panic!("invalid event: {event:?}"), + } +} + +#[tokio::test] +async fn set_reserved_peers_one_peer_already_in_the_set() { + sp_tracing::try_init_simple(); + + let reserved = HashSet::from_iter([PeerId::random(), PeerId::random(), PeerId::random()]); + let common_peer = *reserved.iter().next().unwrap(); + let (mut peerset, to_peerset) = Peerset::new( + ProtocolName::from("/notif/1"), + 25, + 25, + true, + reserved.clone(), + Default::default(), + Arc::new(peerstore_handle_test()), + ); + assert_eq!(peerset.num_in(), 0usize); + assert_eq!(peerset.num_out(), 0usize); + + match peerset.next().await { + Some(PeersetNotificationCommand::OpenSubstream { peers: out_peers }) => { + assert_eq!(peerset.num_in(), 0usize); + assert_eq!(peerset.num_out(), 0usize); + + for outbound_peer in &out_peers { + assert!(reserved.contains(outbound_peer)); + assert!(peerset.reserved_peers().contains(outbound_peer)); + assert_eq!( + peerset.peers().get(&outbound_peer), + Some(&PeerState::Opening { direction: Direction::Outbound(Reserved::Yes) }) + ); + } + }, + event => panic!("invalid event: {event:?}"), + } + + // report that all substreams were opened + for peer in &reserved { + assert!(std::matches!( + peerset.report_substream_opened(*peer, traits::Direction::Outbound), + OpenResult::Accept { .. } + )); + assert_eq!( + peerset.peers().get(peer), + Some(&PeerState::Connected { direction: Direction::Outbound(Reserved::Yes) }) + ); + } + + // add a new set of reserved peers with one peer from the original set + let new_reserved_peers = HashSet::from_iter([PeerId::random(), PeerId::random(), common_peer]); + to_peerset + .unbounded_send(PeersetCommand::SetReservedPeers { peers: new_reserved_peers.clone() }) + .unwrap(); + + match peerset.next().await { + Some(PeersetNotificationCommand::CloseSubstream { peers: out_peers }) => { + assert_eq!(out_peers.len(), 2); + + for peer in &out_peers { + assert!(reserved.contains(peer)); + + if peer != &common_peer { + assert!(!peerset.reserved_peers().contains(peer)); + assert_eq!( + peerset.peers().get(peer), + Some(&PeerState::Closing { direction: Direction::Outbound(Reserved::Yes) }), + ); + } else { + panic!("common peer disconnected"); + } + } + + for peer in &new_reserved_peers { + assert!(peerset.reserved_peers().contains(peer)); + } + }, + event => panic!("invalid event: {event:?}"), + } + + // verify the `common_peer` peer between the reserved sets is still in the state `Open` + assert_eq!( + peerset.peers().get(&common_peer), + Some(&PeerState::Connected { direction: Direction::Outbound(Reserved::Yes) }) + ); + + match peerset.next().await { + Some(PeersetNotificationCommand::OpenSubstream { peers: out_peers }) => { + assert!(!out_peers.is_empty()); + assert_eq!(out_peers.len(), 2); + + for peer in &new_reserved_peers { + assert!(peerset.reserved_peers().contains(peer)); + + if peer != &common_peer { + assert_eq!( + peerset.peers().get(peer), + Some(&PeerState::Opening { direction: Direction::Outbound(Reserved::Yes) }), + ); + } + } + }, + event => panic!("invalid event: {event:?}"), + } +} + +#[tokio::test] +async fn add_reserved_peers_one_peer_already_in_the_set() { + sp_tracing::try_init_simple(); + + let peerstore_handle = Arc::new(peerstore_handle_test()); + let reserved = (0..3) + .map(|_| { + let peer = PeerId::random(); + peerstore_handle.add_known_peer(peer); + peer + }) + .collect::>(); + let common_peer = *reserved.iter().next().unwrap(); + let (mut peerset, to_peerset) = Peerset::new( + ProtocolName::from("/notif/1"), + 25, + 25, + true, + reserved.iter().cloned().collect(), + Default::default(), + peerstore_handle, + ); + assert_eq!(peerset.num_in(), 0usize); + assert_eq!(peerset.num_out(), 0usize); + + match peerset.next().await { + Some(PeersetNotificationCommand::OpenSubstream { peers: out_peers }) => { + assert_eq!(peerset.num_in(), 0usize); + assert_eq!(peerset.num_out(), 0usize); + assert_eq!(out_peers.len(), 3); + + for outbound_peer in &out_peers { + assert!(reserved.contains(outbound_peer)); + assert!(peerset.reserved_peers().contains(outbound_peer)); + assert_eq!( + peerset.peers().get(&outbound_peer), + Some(&PeerState::Opening { direction: Direction::Outbound(Reserved::Yes) }) + ); + } + }, + event => panic!("invalid event: {event:?}"), + } + + // report that all substreams were opened + for peer in &reserved { + assert!(std::matches!( + peerset.report_substream_opened(*peer, traits::Direction::Outbound), + OpenResult::Accept { .. } + )); + assert_eq!( + peerset.peers().get(peer), + Some(&PeerState::Connected { direction: Direction::Outbound(Reserved::Yes) }) + ); + } + + // add a new set of reserved peers with one peer from the original set + let new_reserved_peers = HashSet::from_iter([PeerId::random(), PeerId::random(), common_peer]); + to_peerset + .unbounded_send(PeersetCommand::AddReservedPeers { peers: new_reserved_peers.clone() }) + .unwrap(); + + match peerset.next().await { + Some(PeersetNotificationCommand::OpenSubstream { peers: out_peers }) => { + assert_eq!(out_peers.len(), 2); + assert!(!out_peers.iter().any(|peer| peer == &common_peer)); + + for peer in &out_peers { + assert!(!reserved.contains(peer)); + + if peer != &common_peer { + assert!(peerset.reserved_peers().contains(peer)); + assert_eq!( + peerset.peers().get(peer), + Some(&PeerState::Opening { direction: Direction::Outbound(Reserved::Yes) }), + ); + } + } + }, + event => panic!("invalid event: {event:?}"), + } + + // verify the `common_peer` peer between the reserved sets is still in the state `Open` + assert_eq!( + peerset.peers().get(&common_peer), + Some(&PeerState::Connected { direction: Direction::Outbound(Reserved::Yes) }) + ); +} + +#[tokio::test] +async fn opening_peer_gets_canceled_and_disconnected() { + sp_tracing::try_init_simple(); + + let peerstore_handle = Arc::new(peerstore_handle_test()); + let _known_peers = (0..1) + .map(|_| { + let peer = PeerId::random(); + peerstore_handle.add_known_peer(peer); + peer + }) + .collect::>(); + let num_connected = Arc::new(Default::default()); + let (mut peerset, to_peerset) = Peerset::new( + ProtocolName::from("/notif/1"), + 25, + 25, + false, + Default::default(), + Arc::clone(&num_connected), + peerstore_handle, + ); + assert_eq!(peerset.num_in(), 0); + assert_eq!(peerset.num_out(), 0); + + let peer = match peerset.next().await { + Some(PeersetNotificationCommand::OpenSubstream { peers: out_peers }) => { + assert_eq!(peerset.num_in(), 0); + assert_eq!(peerset.num_out(), 1); + assert_eq!(out_peers.len(), 1); + + for peer in &out_peers { + assert_eq!( + peerset.peers().get(&peer), + Some(&PeerState::Opening { direction: Direction::Outbound(Reserved::No) }) + ); + } + + out_peers[0] + }, + event => panic!("invalid event: {event:?}"), + }; + + // disconnect the now-opening peer + to_peerset.unbounded_send(PeersetCommand::DisconnectPeer { peer }).unwrap(); + + // poll `Peerset` to register the command and verify the peer is now in state `Canceled` + futures::future::poll_fn(|cx| match peerset.poll_next_unpin(cx) { + Poll::Pending => Poll::Ready(()), + _ => panic!("unexpected event"), + }) + .await; + + assert_eq!( + peerset.peers().get(&peer), + Some(&PeerState::Canceled { direction: Direction::Outbound(Reserved::No) }) + ); + assert_eq!(peerset.num_out(), 1); + + // report to `Peerset` that the substream was opened, verify that it gets closed + assert!(std::matches!( + peerset.report_substream_opened(peer, traits::Direction::Outbound), + OpenResult::Reject { .. } + )); + assert_eq!( + peerset.peers().get(&peer), + Some(&PeerState::Closing { direction: Direction::Outbound(Reserved::No) }) + ); + assert_eq!(num_connected.load(Ordering::SeqCst), 1); + assert_eq!(peerset.num_out(), 1); + + // report close event to `Peerset` and verify state + peerset.report_substream_closed(peer); + assert_eq!(peerset.num_out(), 0); + assert_eq!(num_connected.load(Ordering::SeqCst), 0); + assert_eq!(peerset.peers().get(&peer), Some(&PeerState::Backoff)); +} + +#[tokio::test] +async fn open_failure_for_canceled_peer() { + sp_tracing::try_init_simple(); + + let peerstore_handle = Arc::new(peerstore_handle_test()); + let _known_peers = (0..1) + .map(|_| { + let peer = PeerId::random(); + peerstore_handle.add_known_peer(peer); + peer + }) + .collect::>(); + let (mut peerset, to_peerset) = Peerset::new( + ProtocolName::from("/notif/1"), + 25, + 25, + false, + Default::default(), + Default::default(), + peerstore_handle, + ); + assert_eq!(peerset.num_in(), 0usize); + assert_eq!(peerset.num_out(), 0usize); + + let peer = match peerset.next().await { + Some(PeersetNotificationCommand::OpenSubstream { peers: out_peers }) => { + assert_eq!(peerset.num_in(), 0usize); + assert_eq!(peerset.num_out(), 1usize); + assert_eq!(out_peers.len(), 1); + + for peer in &out_peers { + assert_eq!( + peerset.peers().get(&peer), + Some(&PeerState::Opening { direction: Direction::Outbound(Reserved::No) }) + ); + } + + out_peers[0] + }, + event => panic!("invalid event: {event:?}"), + }; + + // disconnect the now-opening peer + to_peerset.unbounded_send(PeersetCommand::DisconnectPeer { peer }).unwrap(); + + // poll `Peerset` to register the command and verify the peer is now in state `Canceled` + futures::future::poll_fn(|cx| match peerset.poll_next_unpin(cx) { + Poll::Pending => Poll::Ready(()), + _ => panic!("unexpected event"), + }) + .await; + + assert_eq!( + peerset.peers().get(&peer), + Some(&PeerState::Canceled { direction: Direction::Outbound(Reserved::No) }) + ); + + // the substream failed to open, verify that peer state is now `Backoff` + // and that `Peerset` doesn't emit any events + peerset.report_substream_open_failure(peer, NotificationError::NoConnection); + assert_eq!(peerset.peers().get(&peer), Some(&PeerState::Backoff)); + + futures::future::poll_fn(|cx| match peerset.poll_next_unpin(cx) { + Poll::Pending => Poll::Ready(()), + _ => panic!("unexpected event"), + }) + .await; +} + +#[tokio::test] +async fn peer_disconnected_when_being_validated_then_rejected() { + sp_tracing::try_init_simple(); + + let peerstore_handle = Arc::new(peerstore_handle_test()); + let (mut peerset, _to_peerset) = Peerset::new( + ProtocolName::from("/notif/1"), + 25, + 25, + false, + Default::default(), + Default::default(), + peerstore_handle, + ); + assert_eq!(peerset.num_in(), 0usize); + assert_eq!(peerset.num_out(), 0usize); + + // inbound substream received + let peer = PeerId::random(); + assert_eq!(peerset.report_inbound_substream(peer), ValidationResult::Accept); + + // substream failed to open while it was being validated by the protocol + peerset.report_substream_open_failure(peer, NotificationError::NoConnection); + assert_eq!(peerset.peers().get(&peer), Some(&PeerState::Backoff)); + + // protocol rejected substream, verify + peerset.report_substream_rejected(peer); + assert_eq!(peerset.peers().get(&peer), Some(&PeerState::Backoff)); +} + +#[tokio::test] +async fn removed_reserved_peer_kept_due_to_free_slots() { + sp_tracing::try_init_simple(); + + let peerstore_handle = Arc::new(peerstore_handle_test()); + let peers = HashSet::from_iter([PeerId::random(), PeerId::random(), PeerId::random()]); + + let (mut peerset, to_peerset) = Peerset::new( + ProtocolName::from("/notif/1"), + 25, + 25, + true, + peers.clone(), + Default::default(), + peerstore_handle, + ); + assert_eq!(peerset.num_in(), 0usize); + assert_eq!(peerset.num_out(), 0usize); + + match peerset.next().await { + Some(PeersetNotificationCommand::OpenSubstream { peers: out_peers }) => { + assert_eq!(peerset.num_in(), 0usize); + assert_eq!(peerset.num_out(), 0usize); + + for outbound_peer in &out_peers { + assert!(peers.contains(outbound_peer)); + assert_eq!( + peerset.peers().get(&outbound_peer), + Some(&PeerState::Opening { direction: Direction::Outbound(Reserved::Yes) }) + ); + } + }, + event => panic!("invalid event: {event:?}"), + } + + // remove all reserved peers + to_peerset + .unbounded_send(PeersetCommand::RemoveReservedPeers { peers: peers.clone() }) + .unwrap(); + + match peerset.next().await { + Some(PeersetNotificationCommand::CloseSubstream { peers: out_peers }) => { + assert!(out_peers.is_empty()); + }, + event => panic!("invalid event: {event:?}"), + } + + // verify all reserved peers are canceled + for (_, state) in peerset.peers() { + assert_eq!(state, &PeerState::Opening { direction: Direction::Outbound(Reserved::No) }); + } + + assert_eq!(peerset.num_in(), 0usize); + assert_eq!(peerset.num_out(), 3usize); +} + +#[tokio::test] +async fn set_reserved_peers_but_available_slots() { + sp_tracing::try_init_simple(); + + let peerstore_handle = Arc::new(peerstore_handle_test()); + let known_peers = (0..3) + .map(|_| { + let peer = PeerId::random(); + peerstore_handle.add_known_peer(peer); + peer + }) + .collect::>(); + + // one peer is common across operations meaning an outbound substream will be opened to them + // when `Peerset` is polled (along with two random peers) and later on `SetReservedPeers` + // is called with the common peer and with two new random peers + let common_peer = *known_peers.iter().next().unwrap(); + + let (mut peerset, to_peerset) = Peerset::new( + ProtocolName::from("/notif/1"), + 25, + 25, + false, + Default::default(), + Default::default(), + peerstore_handle, + ); + assert_eq!(peerset.num_in(), 0usize); + assert_eq!(peerset.num_out(), 0usize); + + // We have less than 25 outbound peers connected. At the next slot allocation we + // query the `peerstore_handle` for more peers to connect to. + match peerset.next().await { + Some(PeersetNotificationCommand::OpenSubstream { peers: out_peers }) => { + assert_eq!(out_peers.len(), 3); + + for peer in &out_peers { + assert_eq!( + peerset.peers().get(&peer), + Some(&PeerState::Opening { direction: Direction::Outbound(Reserved::No) }) + ); + } + }, + event => panic!("invalid event: {event:?}"), + } + + // verify all three peers are counted as outbound peers + assert_eq!(peerset.num_in(), 0usize); + assert_eq!(peerset.num_out(), 3usize); + + // report that all substreams were opened + for peer in &known_peers { + assert!(std::matches!( + peerset.report_substream_opened(*peer, traits::Direction::Outbound), + OpenResult::Accept { .. } + )); + assert_eq!( + peerset.peers().get(peer), + Some(&PeerState::Connected { direction: Direction::Outbound(Reserved::No) }) + ); + } + + // set reserved peers with `common_peer` being one of them + let reserved_peers = HashSet::from_iter([common_peer, PeerId::random(), PeerId::random()]); + to_peerset + .unbounded_send(PeersetCommand::SetReservedPeers { peers: reserved_peers.clone() }) + .unwrap(); + + // The command `SetReservedPeers` might evict currently reserved peers if + // we don't have enough slot capacity to move them to regular nodes. + // In this case, we did not have previously any reserved peers. + match peerset.next().await { + Some(PeersetNotificationCommand::CloseSubstream { peers }) => { + // This ensures we don't disconnect peers when receiving `SetReservedPeers`. + assert_eq!(peers.len(), 0); + }, + event => panic!("invalid event: {event:?}"), + } + + // verify that `Peerset` is aware of five peers, with two of them as outbound. + assert_eq!(peerset.peers().len(), 5); + assert_eq!(peerset.num_in(), 0usize); + assert_eq!(peerset.num_out(), 2usize); + assert_eq!(peerset.reserved_peers().len(), 3usize); + + match peerset.next().await { + Some(PeersetNotificationCommand::OpenSubstream { peers }) => { + assert_eq!(peers.len(), 2); + assert!(!peers.contains(&common_peer)); + + for peer in &peers { + assert!(reserved_peers.contains(peer)); + assert!(peerset.reserved_peers().contains(peer)); + assert_eq!( + peerset.peers().get(peer), + Some(&PeerState::Opening { direction: Direction::Outbound(Reserved::Yes) }), + ); + } + }, + event => panic!("invalid event: {event:?}"), + } + + assert_eq!(peerset.peers().len(), 5); + assert_eq!(peerset.num_in(), 0usize); + assert_eq!(peerset.num_out(), 2usize); + assert_eq!(peerset.reserved_peers().len(), 3usize); +} + +#[tokio::test] +async fn set_reserved_peers_move_previously_reserved() { + sp_tracing::try_init_simple(); + + let peerstore_handle = Arc::new(peerstore_handle_test()); + let known_peers = (0..3) + .map(|_| { + let peer = PeerId::random(); + peerstore_handle.add_known_peer(peer); + peer + }) + .collect::>(); + + // We'll keep this peer as reserved and move the the others to regular nodes. + let common_peer = *known_peers.iter().next().unwrap(); + let moved_peers = known_peers.iter().skip(1).copied().collect::>(); + let known_peers = known_peers.into_iter().collect::>(); + assert_eq!(moved_peers.len(), 2); + + let (mut peerset, to_peerset) = Peerset::new( + ProtocolName::from("/notif/1"), + 25, + 25, + false, + known_peers.clone(), + Default::default(), + peerstore_handle, + ); + assert_eq!(peerset.num_in(), 0usize); + assert_eq!(peerset.num_out(), 0usize); + + // We are not connected to the reserved peers. + match peerset.next().await { + Some(PeersetNotificationCommand::OpenSubstream { peers: out_peers }) => { + assert_eq!(out_peers.len(), 3); + + for peer in &out_peers { + assert_eq!( + peerset.peers().get(&peer), + Some(&PeerState::Opening { direction: Direction::Outbound(Reserved::Yes) }) + ); + } + }, + event => panic!("invalid event: {event:?}"), + } + + // verify all three peers are marked as reserved peers and they don't count towards + // slot allocation. + assert_eq!(peerset.num_in(), 0usize); + assert_eq!(peerset.num_out(), 0usize); + assert_eq!(peerset.reserved_peers().len(), 3usize); + + // report that all substreams were opened + for peer in &known_peers { + assert!(std::matches!( + peerset.report_substream_opened(*peer, traits::Direction::Outbound), + OpenResult::Accept { .. } + )); + assert_eq!( + peerset.peers().get(peer), + Some(&PeerState::Connected { direction: Direction::Outbound(Reserved::Yes) }) + ); + } + + // set reserved peers with `common_peer` being one of them + let reserved_peers = HashSet::from_iter([common_peer, PeerId::random(), PeerId::random()]); + to_peerset + .unbounded_send(PeersetCommand::SetReservedPeers { peers: reserved_peers.clone() }) + .unwrap(); + + // The command `SetReservedPeers` might evict currently reserved peers if + // we don't have enough slot capacity to move them to regular nodes. + // In this case, we have enough capacity. + match peerset.next().await { + Some(PeersetNotificationCommand::CloseSubstream { peers }) => { + // This ensures we don't disconnect peers when receiving `SetReservedPeers`. + assert_eq!(peers.len(), 0); + }, + event => panic!("invalid event: {event:?}"), + } + + // verify that `Peerset` is aware of five peers. + // 2 of the previously reserved peers are moved as outbound regular peers and + // count towards slot allocation. + assert_eq!(peerset.peers().len(), 5); + assert_eq!(peerset.num_in(), 0usize); + assert_eq!(peerset.num_out(), 2usize); + assert_eq!(peerset.reserved_peers().len(), 3usize); + + // Ensure the previously reserved are not regular nodes. + for (peer, state) in peerset.peers() { + // This peer was previously reserved and remained reserved after `SetReservedPeers`. + if peer == &common_peer { + assert_eq!( + state, + &PeerState::Connected { direction: Direction::Outbound(Reserved::Yes) } + ); + continue + } + + // Part of the new reserved nodes. + if reserved_peers.contains(peer) { + assert_eq!(state, &PeerState::Disconnected); + continue + } + + // Previously reserved, but remained connected. + if moved_peers.contains(peer) { + // This was previously `Reseved::Yes` but moved to regular nodes. + assert_eq!( + state, + &PeerState::Connected { direction: Direction::Outbound(Reserved::No) } + ); + continue + } + panic!("Invalid state peer={peer:?} state={state:?}"); + } + + match peerset.next().await { + Some(PeersetNotificationCommand::OpenSubstream { peers }) => { + // Open desires with newly reserved. + assert_eq!(peers.len(), 2); + assert!(!peers.contains(&common_peer)); + + for peer in &peers { + assert!(reserved_peers.contains(peer)); + assert!(peerset.reserved_peers().contains(peer)); + assert_eq!( + peerset.peers().get(peer), + Some(&PeerState::Opening { direction: Direction::Outbound(Reserved::Yes) }), + ); + } + }, + event => panic!("invalid event: {event:?}"), + } + + assert_eq!(peerset.peers().len(), 5); + assert_eq!(peerset.num_in(), 0usize); + assert_eq!(peerset.num_out(), 2usize); + assert_eq!(peerset.reserved_peers().len(), 3usize); +} + +#[tokio::test] +async fn set_reserved_peers_cannot_move_previously_reserved() { + sp_tracing::try_init_simple(); + + let peerstore_handle = Arc::new(peerstore_handle_test()); + let known_peers = (0..3) + .map(|_| { + let peer = PeerId::random(); + peerstore_handle.add_known_peer(peer); + peer + }) + .collect::>(); + + // We'll keep this peer as reserved and move the the others to regular nodes. + let common_peer = *known_peers.iter().next().unwrap(); + let moved_peers = known_peers.iter().skip(1).copied().collect::>(); + let known_peers = known_peers.into_iter().collect::>(); + assert_eq!(moved_peers.len(), 2); + + // We don't have capacity to move peers. + let (mut peerset, to_peerset) = Peerset::new( + ProtocolName::from("/notif/1"), + 0, + 0, + false, + known_peers.clone(), + Default::default(), + peerstore_handle, + ); + assert_eq!(peerset.num_in(), 0usize); + assert_eq!(peerset.num_out(), 0usize); + + // We are not connected to the reserved peers. + match peerset.next().await { + Some(PeersetNotificationCommand::OpenSubstream { peers: out_peers }) => { + assert_eq!(out_peers.len(), 3); + + for peer in &out_peers { + assert_eq!( + peerset.peers().get(&peer), + Some(&PeerState::Opening { direction: Direction::Outbound(Reserved::Yes) }) + ); + } + }, + event => panic!("invalid event: {event:?}"), + } + + // verify all three peers are marked as reserved peers and they don't count towards + // slot allocation. + assert_eq!(peerset.num_in(), 0usize); + assert_eq!(peerset.num_out(), 0usize); + assert_eq!(peerset.reserved_peers().len(), 3usize); + + // report that all substreams were opened + for peer in &known_peers { + assert!(std::matches!( + peerset.report_substream_opened(*peer, traits::Direction::Outbound), + OpenResult::Accept { .. } + )); + assert_eq!( + peerset.peers().get(peer), + Some(&PeerState::Connected { direction: Direction::Outbound(Reserved::Yes) }) + ); + } + + // set reserved peers with `common_peer` being one of them + let reserved_peers = HashSet::from_iter([common_peer, PeerId::random(), PeerId::random()]); + to_peerset + .unbounded_send(PeersetCommand::SetReservedPeers { peers: reserved_peers.clone() }) + .unwrap(); + + // The command `SetReservedPeers` might evict currently reserved peers if + // we don't have enough slot capacity to move them to regular nodes. + // In this case, we don't have enough capacity. + match peerset.next().await { + Some(PeersetNotificationCommand::CloseSubstream { peers }) => { + // This ensures we don't disconnect peers when receiving `SetReservedPeers`. + assert_eq!(peers.len(), 2); + + for peer in peers { + // Ensure common peer is not disconnected. + assert_ne!(common_peer, peer); + + assert_eq!( + peerset.peers().get(&peer), + Some(&PeerState::Closing { direction: Direction::Outbound(Reserved::Yes) }) + ); + } + }, + event => panic!("invalid event: {event:?}"), + } + + assert_eq!(peerset.num_in(), 0usize); + assert_eq!(peerset.num_out(), 0usize); + assert_eq!(peerset.reserved_peers().len(), 3usize); +} + +#[tokio::test] +async fn reserved_only_rejects_non_reserved_peers() { + sp_tracing::try_init_simple(); + + let peerstore_handle = Arc::new(peerstore_handle_test()); + let reserved_peers = HashSet::from_iter([PeerId::random(), PeerId::random(), PeerId::random()]); + + let connected_peers = Arc::new(AtomicUsize::new(0)); + let (mut peerset, to_peerset) = Peerset::new( + ProtocolName::from("/notif/1"), + 3, + 3, + true, + reserved_peers.clone(), + connected_peers.clone(), + peerstore_handle, + ); + assert_eq!(peerset.num_in(), 0usize); + assert_eq!(peerset.num_out(), 0usize); + + // Step 1. Connect reserved peers. + { + match peerset.next().await { + Some(PeersetNotificationCommand::OpenSubstream { peers: out_peers }) => { + assert_eq!(peerset.num_in(), 0usize); + assert_eq!(peerset.num_out(), 0usize); + + for outbound_peer in &out_peers { + assert!(reserved_peers.contains(outbound_peer)); + assert_eq!( + peerset.peers().get(&outbound_peer), + Some(&PeerState::Opening { direction: Direction::Outbound(Reserved::Yes) }) + ); + } + }, + event => panic!("invalid event: {event:?}"), + } + // Report the reserved peers as connected. + for peer in &reserved_peers { + assert!(std::matches!( + peerset.report_substream_opened(*peer, traits::Direction::Outbound), + OpenResult::Accept { .. } + )); + assert_eq!( + peerset.peers().get(peer), + Some(&PeerState::Connected { direction: Direction::Outbound(Reserved::Yes) }) + ); + } + assert_eq!(connected_peers.load(Ordering::Relaxed), 3usize); + } + + // Step 2. Ensure non-reserved peers are rejected. + let normal_peers: Vec = vec![PeerId::random(), PeerId::random(), PeerId::random()]; + { + // Report the peers as inbound for validation purposes. + for peer in &normal_peers { + // We are running in reserved only mode. + let result = peerset.report_inbound_substream(*peer); + assert_eq!(result, ValidationResult::Reject); + + // The peer must be kept in the disconnected state. + assert_eq!(peerset.peers().get(peer), Some(&PeerState::Disconnected)); + } + // Ensure slots are not used. + assert_eq!(peerset.num_in(), 0usize); + assert_eq!(peerset.num_out(), 0usize); + + // Report that all substreams were opened. + for peer in &normal_peers { + // We must reject them because the peers were rejected prior by + // `report_inbound_substream` and therefore set into the disconnected state. + let result = peerset.report_substream_opened(*peer, traits::Direction::Inbound); + assert_eq!(result, OpenResult::Reject); + + // Peer remains disconnected. + assert_eq!(peerset.peers().get(&peer), Some(&PeerState::Disconnected)); + } + assert_eq!(connected_peers.load(Ordering::Relaxed), 3usize); + + // Because we have returned `Reject` from `report_substream_opened` + // the substreams will later be closed. + for peer in &normal_peers { + peerset.report_substream_closed(*peer); + + // Peer moves into the backoff state. + assert_eq!(peerset.peers().get(peer), Some(&PeerState::Backoff)); + } + // The slots are not used / altered. + assert_eq!(connected_peers.load(Ordering::Relaxed), 3usize); + } + + // Move peers out of the backoff state (ie simulate 5s elapsed time). + for (peer, state) in peerset.peers_mut() { + if normal_peers.contains(peer) { + match state { + PeerState::Backoff => *state = PeerState::Disconnected, + state => panic!("invalid state peer={peer:?} state={state:?}"), + } + } else if reserved_peers.contains(peer) { + match state { + PeerState::Connected { direction: Direction::Outbound(Reserved::Yes) } => {}, + state => panic!("invalid state peer={peer:?} state={state:?}"), + } + } else { + panic!("invalid peer={peer:?} not present"); + } + } + + // Step 3. Allow connections from non-reserved peers. + { + to_peerset + .unbounded_send(PeersetCommand::SetReservedOnly { reserved_only: false }) + .unwrap(); + // This will activate the non-reserved peers and give us the best outgoing + // candidates to connect to. + match peerset.next().await { + Some(PeersetNotificationCommand::OpenSubstream { peers }) => { + // These are the non-reserved peers we informed the peerset above. + assert_eq!(peers.len(), 3); + for peer in &peers { + assert!(!reserved_peers.contains(peer)); + assert_eq!( + peerset.peers().get(peer), + Some(&PeerState::Opening { direction: Direction::Outbound(Reserved::No) }) + ); + assert!(normal_peers.contains(peer)); + } + }, + event => panic!("invalid event : {event:?}"), + } + // Ensure slots are used. + assert_eq!(peerset.num_in(), 0usize); + assert_eq!(peerset.num_out(), 3usize); + + for peer in &normal_peers { + let result = peerset.report_inbound_substream(*peer); + assert_eq!(result, ValidationResult::Accept); + // Direction is kept from the outbound slot allocation. + assert_eq!( + peerset.peers().get(peer), + Some(&PeerState::Opening { direction: Direction::Outbound(Reserved::No) }) + ); + } + // Ensure slots are used. + assert_eq!(peerset.num_in(), 0usize); + assert_eq!(peerset.num_out(), 3usize); + // Peers are only reported as connected once the substream is opened. + // 3 represents the reserved peers that are already connected. + assert_eq!(connected_peers.load(Ordering::Relaxed), 3usize); + + let (success, failure) = normal_peers.split_at(2); + for peer in success { + assert!(std::matches!( + peerset.report_substream_opened(*peer, traits::Direction::Outbound), + OpenResult::Accept { .. } + )); + assert_eq!( + peerset.peers().get(peer), + Some(&PeerState::Connected { direction: Direction::Outbound(Reserved::No) }) + ); + } + // Simulate one failure. + let failure = failure[0]; + peerset.report_substream_open_failure(failure, NotificationError::ChannelClogged); + assert_eq!(peerset.peers().get(&failure), Some(&PeerState::Backoff)); + assert_eq!(peerset.num_in(), 0usize); + assert_eq!(peerset.num_out(), 2usize); + assert_eq!(connected_peers.load(Ordering::Relaxed), 5usize); + } +} diff --git a/client/network/src/litep2p/shim/request_response/metrics.rs b/client/network/src/litep2p/shim/request_response/metrics.rs new file mode 100644 index 00000000..b04b6ed9 --- /dev/null +++ b/client/network/src/litep2p/shim/request_response/metrics.rs @@ -0,0 +1,78 @@ +// This file is part of Substrate. + +// Copyright (C) Parity Technologies (UK) Ltd. +// SPDX-License-Identifier: GPL-3.0-or-later WITH Classpath-exception-2.0 + +// This program is free software: you can redistribute it and/or modify +// it under the terms of the GNU General Public License as published by +// the Free Software Foundation, either version 3 of the License, or +// (at your option) any later version. + +// This program is distributed in the hope that it will be useful, +// but WITHOUT ANY WARRANTY; without even the implied warranty of +// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +// GNU General Public License for more details. + +// You should have received a copy of the GNU General Public License +// along with this program. If not, see . + +//! Metrics for [`RequestResponseProtocol`](super::RequestResponseProtocol). + +use crate::{service::metrics::Metrics, types::ProtocolName}; + +use std::time::Duration; + +/// Request-response metrics. +pub struct RequestResponseMetrics { + /// Metrics. + metrics: Option, + + /// Protocol name. + protocol: ProtocolName, +} + +impl RequestResponseMetrics { + pub fn new(metrics: Option, protocol: ProtocolName) -> Self { + Self { metrics, protocol } + } + + /// Register inbound request failure to Prometheus + pub fn register_inbound_request_failure(&self, reason: &str) { + if let Some(metrics) = &self.metrics { + metrics + .requests_in_failure_total + .with_label_values(&[&self.protocol, reason]) + .inc(); + } + } + + /// Register inbound request success to Prometheus + pub fn register_inbound_request_success(&self, serve_time: Duration) { + if let Some(metrics) = &self.metrics { + metrics + .requests_in_success_total + .with_label_values(&[&self.protocol]) + .observe(serve_time.as_secs_f64()); + } + } + + /// Register inbound request failure to Prometheus + pub fn register_outbound_request_failure(&self, reason: &str) { + if let Some(metrics) = &self.metrics { + metrics + .requests_out_failure_total + .with_label_values(&[&self.protocol, reason]) + .inc(); + } + } + + /// Register inbound request success to Prometheus + pub fn register_outbound_request_success(&self, duration: Duration) { + if let Some(metrics) = &self.metrics { + metrics + .requests_out_success_total + .with_label_values(&[&self.protocol]) + .observe(duration.as_secs_f64()); + } + } +} diff --git a/client/network/src/litep2p/shim/request_response/mod.rs b/client/network/src/litep2p/shim/request_response/mod.rs new file mode 100644 index 00000000..d30fdfdc --- /dev/null +++ b/client/network/src/litep2p/shim/request_response/mod.rs @@ -0,0 +1,568 @@ +// This file is part of Substrate. + +// Copyright (C) Parity Technologies (UK) Ltd. +// SPDX-License-Identifier: GPL-3.0-or-later WITH Classpath-exception-2.0 + +// This program is free software: you can redistribute it and/or modify +// it under the terms of the GNU General Public License as published by +// the Free Software Foundation, either version 3 of the License, or +// (at your option) any later version. + +// This program is distributed in the hope that it will be useful, +// but WITHOUT ANY WARRANTY; without even the implied warranty of +// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +// GNU General Public License for more details. + +// You should have received a copy of the GNU General Public License +// along with this program. If not, see . + +//! Shim for litep2p's request-response implementation to make it work with `sc_network`'s +//! request-response API. + +use crate::{ + litep2p::shim::request_response::metrics::RequestResponseMetrics, + peer_store::PeerStoreProvider, + request_responses::{IncomingRequest, OutgoingResponse}, + service::{metrics::Metrics, traits::RequestResponseConfig as RequestResponseConfigT}, + IfDisconnected, OutboundFailure, ProtocolName, RequestFailure, +}; + +use futures::{channel::oneshot, future::BoxFuture, stream::FuturesUnordered, StreamExt}; +use litep2p::{ + error::{ImmediateDialError, NegotiationError, SubstreamError}, + protocol::request_response::{ + DialOptions, RejectReason, RequestResponseError, RequestResponseEvent, + RequestResponseHandle, + }, + types::RequestId, +}; + +use sc_network_types::PeerId; +use sc_utils::mpsc::{TracingUnboundedReceiver, TracingUnboundedSender}; + +use std::{ + collections::HashMap, + sync::Arc, + time::{Duration, Instant}, +}; + +mod metrics; + +#[cfg(test)] +mod tests; + +/// Logging target for the file. +const LOG_TARGET: &str = "sub-libp2p::request-response"; + +/// Type containing information related to an outbound request. +#[derive(Debug)] +pub struct OutboundRequest { + /// Peer ID. + peer: PeerId, + + /// Request. + request: Vec, + + /// Fallback request, if provided. + fallback_request: Option<(Vec, ProtocolName)>, + + /// `oneshot::Sender` for sending the received response, or failure. + sender: oneshot::Sender, ProtocolName), RequestFailure>>, + + /// What should the node do if `peer` is disconnected. + dial_behavior: IfDisconnected, +} + +impl OutboundRequest { + /// Create new [`OutboundRequest`]. + pub fn new( + peer: PeerId, + request: Vec, + sender: oneshot::Sender, ProtocolName), RequestFailure>>, + fallback_request: Option<(Vec, ProtocolName)>, + dial_behavior: IfDisconnected, + ) -> Self { + OutboundRequest { peer, request, sender, fallback_request, dial_behavior } + } +} + +/// Pending request. +struct PendingRequest { + tx: oneshot::Sender, ProtocolName), RequestFailure>>, + started: Instant, + fallback_request: Option<(Vec, ProtocolName)>, +} + +impl PendingRequest { + /// Create new [`PendingRequest`]. + fn new( + tx: oneshot::Sender, ProtocolName), RequestFailure>>, + started: Instant, + fallback_request: Option<(Vec, ProtocolName)>, + ) -> Self { + Self { tx, started, fallback_request } + } +} + +/// Request-response protocol configuration. +/// +/// See [`RequestResponseConfiguration`](crate::request_response::ProtocolConfig) for more details. +#[derive(Debug)] +pub struct RequestResponseConfig { + /// Name of the protocol on the wire. Should be something like `/foo/bar`. + pub protocol_name: ProtocolName, + + /// Fallback on the wire protocol names to support. + pub fallback_names: Vec, + + /// Maximum allowed size, in bytes, of a request. + pub max_request_size: u64, + + /// Maximum allowed size, in bytes, of a response. + pub max_response_size: u64, + + /// Duration after which emitted requests are considered timed out. + pub request_timeout: Duration, + + /// Channel on which the networking service will send incoming requests. + pub inbound_queue: Option>, +} + +impl RequestResponseConfig { + /// Create new [`RequestResponseConfig`]. + pub(crate) fn new( + protocol_name: ProtocolName, + fallback_names: Vec, + max_request_size: u64, + max_response_size: u64, + request_timeout: Duration, + inbound_queue: Option>, + ) -> Self { + Self { + protocol_name, + fallback_names, + max_request_size, + max_response_size, + request_timeout, + inbound_queue, + } + } +} + +impl RequestResponseConfigT for RequestResponseConfig { + fn protocol_name(&self) -> &ProtocolName { + &self.protocol_name + } +} + +/// Request-response protocol. +/// +/// This is slightly different from the `RequestResponsesBehaviour` in that it is protocol-specific, +/// meaning there is an instance of `RequestResponseProtocol` for each installed request-response +/// protocol and that instance deals only with the requests and responses of that protocol, nothing +/// else. It also differs from the other implementation by combining both inbound and outbound +/// requests under one instance so all request-response-related behavior of any given protocol is +/// handled through one instance of `RequestResponseProtocol`. +pub struct RequestResponseProtocol { + /// Protocol name. + protocol: ProtocolName, + + /// Handle to request-response protocol. + handle: RequestResponseHandle, + + /// Inbound queue for sending received requests to protocol implementation in Polkadot SDK. + inbound_queue: Option>, + + /// Handle to `Peerstore`. + peerstore_handle: Arc, + + /// Pending responses. + pending_inbound_responses: HashMap, + + /// Pending outbound responses. + pending_outbound_responses: FuturesUnordered< + BoxFuture<'static, (litep2p::PeerId, RequestId, Result, Instant)>, + >, + + /// RX channel for receiving info for outbound requests. + request_rx: TracingUnboundedReceiver, + + /// Map of supported request-response protocols which are used to support fallback requests. + /// + /// If negotiation for the main protocol fails and the request was sent with a fallback, + /// [`RequestResponseProtocol`] queries this map and sends the request that protocol for + /// processing. + request_tx: HashMap>, + + /// Metrics, if enabled. + metrics: RequestResponseMetrics, +} + +impl RequestResponseProtocol { + /// Create new [`RequestResponseProtocol`]. + pub fn new( + protocol: ProtocolName, + handle: RequestResponseHandle, + peerstore_handle: Arc, + inbound_queue: Option>, + request_rx: TracingUnboundedReceiver, + request_tx: HashMap>, + metrics: Option, + ) -> Self { + Self { + handle, + request_rx, + request_tx, + inbound_queue, + peerstore_handle, + protocol: protocol.clone(), + pending_inbound_responses: HashMap::new(), + pending_outbound_responses: FuturesUnordered::new(), + metrics: RequestResponseMetrics::new(metrics, protocol), + } + } + + /// Send `request` to `peer`. + async fn on_send_request( + &mut self, + peer: PeerId, + request: Vec, + fallback_request: Option<(Vec, ProtocolName)>, + tx: oneshot::Sender, ProtocolName), RequestFailure>>, + connect: IfDisconnected, + ) { + let dial_options = match connect { + IfDisconnected::TryConnect => DialOptions::Dial, + IfDisconnected::ImmediateError => DialOptions::Reject, + }; + + log::trace!( + target: LOG_TARGET, + "{}: send request to {:?} (fallback {:?}) (dial options: {:?})", + self.protocol, + peer, + fallback_request, + dial_options, + ); + + match self.handle.try_send_request(peer.into(), request, dial_options) { + Ok(request_id) => { + self.pending_inbound_responses + .insert(request_id, PendingRequest::new(tx, Instant::now(), fallback_request)); + }, + Err(error) => { + log::warn!( + target: LOG_TARGET, + "{}: failed to send request to {peer:?}: {error:?}", + self.protocol, + ); + + let _ = tx.send(Err(RequestFailure::Refused)); + self.metrics.register_inbound_request_failure(error.to_string().as_ref()); + }, + } + } + + /// Handle inbound request from `peer` + /// + /// If the protocol is configured outbound only, reject the request immediately. + fn on_inbound_request( + &mut self, + peer: litep2p::PeerId, + fallback: Option, + request_id: RequestId, + request: Vec, + ) { + log::trace!( + target: LOG_TARGET, + "{}: request received from {peer:?} ({fallback:?} {request_id:?}), request size {:?}", + self.protocol, + request.len(), + ); + + let Some(inbound_queue) = &self.inbound_queue else { + log::trace!( + target: LOG_TARGET, + "{}: rejecting inbound request from {peer:?}, protocol configured as outbound only", + self.protocol, + ); + + self.handle.reject_request(request_id); + return; + }; + + if self.peerstore_handle.is_banned(&peer.into()) { + log::trace!( + target: LOG_TARGET, + "{}: rejecting inbound request from banned {peer:?} ({request_id:?})", + self.protocol, + ); + + self.handle.reject_request(request_id); + self.metrics.register_inbound_request_failure("banned-peer"); + return; + } + + let (tx, rx) = oneshot::channel(); + + match inbound_queue.try_send(IncomingRequest { + peer: peer.into(), + payload: request, + pending_response: tx, + }) { + Ok(_) => { + self.pending_outbound_responses.push(Box::pin(async move { + (peer, request_id, rx.await.map_err(|_| ()), Instant::now()) + })); + }, + Err(error) => { + log::trace!( + target: LOG_TARGET, + "{:?}: dropping request from {peer:?} ({request_id:?}), inbound queue full", + self.protocol, + ); + + self.handle.reject_request(request_id); + self.metrics.register_inbound_request_failure(error.to_string().as_ref()); + }, + } + } + + /// Handle received inbound response. + fn on_inbound_response( + &mut self, + peer: litep2p::PeerId, + request_id: RequestId, + _fallback: Option, + response: Vec, + ) { + match self.pending_inbound_responses.remove(&request_id) { + None => log::warn!( + target: LOG_TARGET, + "{:?}: response received for {peer:?} but {request_id:?} doesn't exist", + self.protocol, + ), + Some(PendingRequest { tx, started, .. }) => { + log::trace!( + target: LOG_TARGET, + "{:?}: response received for {peer:?} ({request_id:?}), response size {:?}", + self.protocol, + response.len(), + ); + + let _ = tx.send(Ok((response, self.protocol.clone()))); + self.metrics.register_outbound_request_success(started.elapsed()); + }, + } + } + + /// Handle failed outbound request. + fn on_request_failed( + &mut self, + peer: litep2p::PeerId, + request_id: RequestId, + error: RequestResponseError, + ) { + log::debug!( + target: LOG_TARGET, + "{:?}: request failed for {peer:?} ({request_id:?}): {error:?}", + self.protocol + ); + + let Some(PendingRequest { tx, fallback_request, .. }) = + self.pending_inbound_responses.remove(&request_id) + else { + log::warn!( + target: LOG_TARGET, + "{:?}: request failed for peer {peer:?} but {request_id:?} doesn't exist", + self.protocol, + ); + + return + }; + + let status = match error { + RequestResponseError::NotConnected => + Some((RequestFailure::NotConnected, "not-connected")), + RequestResponseError::Rejected(reason) => { + let reason = match reason { + RejectReason::ConnectionClosed => "connection-closed", + RejectReason::SubstreamClosed => "substream-closed", + RejectReason::SubstreamOpenError(substream_error) => match substream_error { + SubstreamError::NegotiationError(NegotiationError::Timeout) => + "substream-timeout", + _ => "substream-open-error", + }, + RejectReason::DialFailed(None) => "dial-failed", + RejectReason::DialFailed(Some(ImmediateDialError::AlreadyConnected)) => + "dial-already-connected", + RejectReason::DialFailed(Some(ImmediateDialError::PeerIdMissing)) => + "dial-peerid-missing", + RejectReason::DialFailed(Some(ImmediateDialError::TriedToDialSelf)) => + "dial-tried-to-dial-self", + RejectReason::DialFailed(Some(ImmediateDialError::NoAddressAvailable)) => + "dial-no-address-available", + RejectReason::DialFailed(Some(ImmediateDialError::TaskClosed)) => + "dial-task-closed", + RejectReason::DialFailed(Some(ImmediateDialError::ChannelClogged)) => + "dial-channel-clogged", + }; + + Some((RequestFailure::Refused, reason)) + }, + RequestResponseError::Timeout => + Some((RequestFailure::Network(OutboundFailure::Timeout), "timeout")), + RequestResponseError::Canceled => { + log::debug!( + target: LOG_TARGET, + "{}: request canceled by local node to {peer:?} ({request_id:?})", + self.protocol, + ); + None + }, + RequestResponseError::TooLargePayload => { + log::warn!( + target: LOG_TARGET, + "{}: tried to send too large request to {peer:?} ({request_id:?})", + self.protocol, + ); + Some((RequestFailure::Refused, "payload-too-large")) + }, + RequestResponseError::UnsupportedProtocol => match fallback_request { + Some((request, protocol)) => match self.request_tx.get(&protocol) { + Some(sender) => { + log::debug!( + target: LOG_TARGET, + "{}: failed to negotiate protocol with {:?}. Trying the fallback protocol ({})", + self.protocol, + peer, + protocol, + ); + + let outbound_request = OutboundRequest::new( + peer.into(), + request, + tx, + None, + IfDisconnected::ImmediateError, + ); + + // since remote peer doesn't support the main protocol (`self.protocol`), + // try to send the request over a fallback protocol by creating a new + // `OutboundRequest` from the original data, now with the fallback request + // payload, and send it over to the (fallback) request handler like it was + // a normal request. + let _ = sender.unbounded_send(outbound_request); + + return; + }, + None => { + log::warn!( + target: LOG_TARGET, + "{}: fallback request provided but protocol ({}) doesn't exist (peer {:?})", + self.protocol, + protocol, + peer, + ); + + Some((RequestFailure::Refused, "invalid-fallback-protocol")) + }, + }, + None => Some((RequestFailure::Refused, "unsupported-protocol")), + }, + }; + + if let Some((error, reason)) = status { + self.metrics.register_outbound_request_failure(reason); + let _ = tx.send(Err(error)); + } + } + + /// Handle outbound response. + fn on_outbound_response( + &mut self, + peer: litep2p::PeerId, + request_id: RequestId, + response: OutgoingResponse, + started: Instant, + ) { + let OutgoingResponse { result, reputation_changes, sent_feedback } = response; + + for change in reputation_changes { + log::trace!(target: LOG_TARGET, "{}: report {peer:?}: {change:?}", self.protocol); + self.peerstore_handle.report_peer(peer.into(), change); + } + + match result { + Err(()) => { + log::debug!( + target: LOG_TARGET, + "{}: response rejected ({request_id:?}) for {peer:?}", + self.protocol, + ); + + self.handle.reject_request(request_id); + self.metrics.register_inbound_request_failure("rejected"); + }, + Ok(response) => { + log::trace!( + target: LOG_TARGET, + "{}: send response ({request_id:?}) to {peer:?}, response size {}", + self.protocol, + response.len(), + ); + + match sent_feedback { + None => self.handle.send_response(request_id, response), + Some(feedback) => + self.handle.send_response_with_feedback(request_id, response, feedback), + } + + self.metrics.register_inbound_request_success(started.elapsed()); + }, + } + } + + /// Start running event loop of the request-response protocol. + pub async fn run(mut self) { + loop { + tokio::select! { + event = self.handle.next() => match event { + None => return, + Some(RequestResponseEvent::RequestReceived { + peer, + fallback, + request_id, + request, + }) => self.on_inbound_request(peer, fallback, request_id, request), + Some(RequestResponseEvent::ResponseReceived { peer, request_id, fallback, response }) => { + self.on_inbound_response(peer, request_id, fallback, response); + }, + Some(RequestResponseEvent::RequestFailed { peer, request_id, error }) => { + self.on_request_failed(peer, request_id, error); + }, + }, + event = self.pending_outbound_responses.next(), if !self.pending_outbound_responses.is_empty() => match event { + None => return, + Some((peer, request_id, Err(()), _)) => { + log::debug!(target: LOG_TARGET, "{}: reject request ({request_id:?}) from {peer:?}", self.protocol); + + self.handle.reject_request(request_id); + self.metrics.register_inbound_request_failure("rejected"); + } + Some((peer, request_id, Ok(response), started)) => { + self.on_outbound_response(peer, request_id, response, started); + } + }, + event = self.request_rx.next() => match event { + None => return, + Some(outbound_request) => { + let OutboundRequest { peer, request, sender, dial_behavior, fallback_request } = outbound_request; + + self.on_send_request(peer, request, fallback_request, sender, dial_behavior).await; + } + } + } + } + } +} diff --git a/client/network/src/litep2p/shim/request_response/tests.rs b/client/network/src/litep2p/shim/request_response/tests.rs new file mode 100644 index 00000000..78b6ef0a --- /dev/null +++ b/client/network/src/litep2p/shim/request_response/tests.rs @@ -0,0 +1,906 @@ +// This file is part of Substrate. + +// Copyright (C) Parity Technologies (UK) Ltd. +// SPDX-License-Identifier: GPL-3.0-or-later WITH Classpath-exception-2.0 + +// This program is free software: you can redistribute it and/or modify +// it under the terms of the GNU General Public License as published by +// the Free Software Foundation, either version 3 of the License, or +// (at your option) any later version. + +// This program is distributed in the hope that it will be useful, +// but WITHOUT ANY WARRANTY; without even the implied warranty of +// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +// GNU General Public License for more details. + +// You should have received a copy of the GNU General Public License +// along with this program. If not, see . + +use crate::{ + litep2p::{ + peerstore::peerstore_handle_test, + shim::request_response::{OutboundRequest, RequestResponseProtocol}, + }, + request_responses::{IfDisconnected, IncomingRequest, OutgoingResponse}, + ProtocolName, RequestFailure, +}; + +use futures::{channel::oneshot, StreamExt}; +use litep2p::{ + config::ConfigBuilder as Litep2pConfigBuilder, + protocol::request_response::{ + ConfigBuilder, DialOptions, RequestResponseError, RequestResponseEvent, + RequestResponseHandle, + }, + transport::tcp::config::Config as TcpConfig, + Litep2p, Litep2pEvent, +}; + +use sc_network_types::PeerId; +use sc_utils::mpsc::tracing_unbounded; + +use std::{collections::HashMap, sync::Arc, task::Poll}; + +/// Create `litep2p` for testing. +async fn make_litep2p() -> (Litep2p, RequestResponseHandle) { + let (config, handle) = ConfigBuilder::new(litep2p::ProtocolName::from("/protocol/1")) + .with_max_size(1024) + .build(); + + ( + Litep2p::new( + Litep2pConfigBuilder::new() + .with_request_response_protocol(config) + .with_tcp(TcpConfig { + listen_addresses: vec![ + "/ip4/0.0.0.0/tcp/0".parse().unwrap(), + "/ip6/::/tcp/0".parse().unwrap(), + ], + ..Default::default() + }) + .build(), + ) + .unwrap(), + handle, + ) +} + +// connect two `litep2p` instances together +async fn connect_peers(litep2p1: &mut Litep2p, litep2p2: &mut Litep2p) { + let address = litep2p2.listen_addresses().next().unwrap().clone(); + litep2p1.dial_address(address).await.unwrap(); + + let mut litep2p1_connected = false; + let mut litep2p2_connected = false; + + loop { + tokio::select! { + event = litep2p1.next_event() => match event.unwrap() { + Litep2pEvent::ConnectionEstablished { .. } => { + litep2p1_connected = true; + } + _ => {}, + }, + event = litep2p2.next_event() => match event.unwrap() { + Litep2pEvent::ConnectionEstablished { .. } => { + litep2p2_connected = true; + } + _ => {}, + } + } + + if litep2p1_connected && litep2p2_connected { + break + } + } +} + +#[tokio::test] +async fn dial_failure() { + let (mut litep2p, handle) = make_litep2p().await; + let (tx, _rx) = async_channel::bounded(64); + let (outbound_tx, outbound_rx) = tracing_unbounded("outbound-request", 1000); + let senders = HashMap::from_iter([(ProtocolName::from("/protocol/1"), outbound_tx.clone())]); + + let protocol = RequestResponseProtocol::new( + ProtocolName::from("/protocol/1"), + handle, + Arc::new(peerstore_handle_test()), + Some(tx), + outbound_rx, + senders, + None, + ); + + tokio::spawn(protocol.run()); + tokio::spawn(async move { while let Some(_) = litep2p.next_event().await {} }); + + let peer = PeerId::random(); + let (result_tx, result_rx) = oneshot::channel(); + + outbound_tx + .unbounded_send(OutboundRequest { + peer, + request: vec![1, 2, 3, 4], + sender: result_tx, + fallback_request: None, + dial_behavior: IfDisconnected::TryConnect, + }) + .unwrap(); + + assert!(std::matches!(result_rx.await, Ok(Err(RequestFailure::Refused)))); +} + +#[tokio::test] +async fn send_request_to_disconnected_peer() { + let (mut litep2p, handle) = make_litep2p().await; + let (tx, _rx) = async_channel::bounded(64); + let (outbound_tx, outbound_rx) = tracing_unbounded("outbound-request", 1000); + let senders = HashMap::from_iter([(ProtocolName::from("/protocol/1"), outbound_tx.clone())]); + + let protocol = RequestResponseProtocol::new( + ProtocolName::from("/protocol/1"), + handle, + Arc::new(peerstore_handle_test()), + Some(tx), + outbound_rx, + senders, + None, + ); + + tokio::spawn(protocol.run()); + tokio::spawn(async move { while let Some(_) = litep2p.next_event().await {} }); + + let peer = PeerId::random(); + let (result_tx, result_rx) = oneshot::channel(); + + outbound_tx + .unbounded_send(OutboundRequest { + peer, + request: vec![1, 2, 3, 4], + sender: result_tx, + fallback_request: None, + dial_behavior: IfDisconnected::ImmediateError, + }) + .unwrap(); + + assert!(std::matches!(result_rx.await, Ok(Err(RequestFailure::NotConnected)))); +} + +#[tokio::test] +async fn send_request_to_disconnected_peer_and_dial() { + let (mut litep2p1, handle1) = make_litep2p().await; + let (mut litep2p2, handle2) = make_litep2p().await; + + let peer1 = *litep2p1.local_peer_id(); + let peer2 = *litep2p2.local_peer_id(); + + litep2p1.add_known_address( + peer2, + std::iter::once(litep2p2.listen_addresses().next().expect("listen address").clone()), + ); + + let (outbound_tx1, outbound_rx1) = tracing_unbounded("outbound-request", 1000); + let senders = HashMap::from_iter([(ProtocolName::from("/protocol/1"), outbound_tx1.clone())]); + let (tx1, _rx1) = async_channel::bounded(64); + + let protocol1 = RequestResponseProtocol::new( + ProtocolName::from("/protocol/1"), + handle1, + Arc::new(peerstore_handle_test()), + Some(tx1), + outbound_rx1, + senders, + None, + ); + + let (outbound_tx2, outbound_rx2) = tracing_unbounded("outbound-request", 1000); + let senders = HashMap::from_iter([(ProtocolName::from("/protocol/1"), outbound_tx2)]); + let (tx2, rx2) = async_channel::bounded(64); + + let protocol2 = RequestResponseProtocol::new( + ProtocolName::from("/protocol/1"), + handle2, + Arc::new(peerstore_handle_test()), + Some(tx2), + outbound_rx2, + senders, + None, + ); + + tokio::spawn(protocol1.run()); + tokio::spawn(protocol2.run()); + tokio::spawn(async move { while let Some(_) = litep2p1.next_event().await {} }); + tokio::spawn(async move { while let Some(_) = litep2p2.next_event().await {} }); + + let (result_tx, _result_rx) = oneshot::channel(); + outbound_tx1 + .unbounded_send(OutboundRequest { + peer: peer2.into(), + request: vec![1, 2, 3, 4], + sender: result_tx, + fallback_request: None, + dial_behavior: IfDisconnected::TryConnect, + }) + .unwrap(); + + match rx2.recv().await { + Ok(IncomingRequest { peer, payload, .. }) => { + assert_eq!(peer, Into::::into(peer1)); + assert_eq!(payload, vec![1, 2, 3, 4]); + }, + Err(error) => panic!("unexpected error: {error:?}"), + } +} + +#[tokio::test] +async fn too_many_inbound_requests() { + let (mut litep2p1, handle1) = make_litep2p().await; + let (mut litep2p2, mut handle2) = make_litep2p().await; + let peer1 = *litep2p1.local_peer_id(); + + connect_peers(&mut litep2p1, &mut litep2p2).await; + + let (outbound_tx, outbound_rx) = tracing_unbounded("outbound-request", 1000); + let senders = HashMap::from_iter([(ProtocolName::from("/protocol/1"), outbound_tx)]); + let (tx, _rx) = async_channel::bounded(4); + + let protocol = RequestResponseProtocol::new( + ProtocolName::from("/protocol/1"), + handle1, + Arc::new(peerstore_handle_test()), + Some(tx), + outbound_rx, + senders, + None, + ); + + tokio::spawn(protocol.run()); + tokio::spawn(async move { while let Some(_) = litep2p1.next_event().await {} }); + tokio::spawn(async move { while let Some(_) = litep2p2.next_event().await {} }); + + // send 5 request and verify that one of the requests will fail + for _ in 0..5 { + handle2 + .send_request(peer1, vec![1, 2, 3, 4], DialOptions::Reject) + .await + .unwrap(); + } + + // verify that one of the requests is rejected + match handle2.next().await { + Some(RequestResponseEvent::RequestFailed { peer, error, .. }) => { + assert_eq!(peer, peer1); + assert_eq!( + error, + RequestResponseError::Rejected( + litep2p::protocol::request_response::RejectReason::SubstreamClosed + ) + ); + }, + event => panic!("inavlid event: {event:?}"), + } + + // verify that no other events are read from the handle + futures::future::poll_fn(|cx| match handle2.poll_next_unpin(cx) { + Poll::Pending => Poll::Ready(()), + event => panic!("invalid event: {event:?}"), + }) + .await; +} + +#[tokio::test] +async fn feedback_works() { + let (mut litep2p1, handle1) = make_litep2p().await; + let (mut litep2p2, mut handle2) = make_litep2p().await; + + let peer1 = *litep2p1.local_peer_id(); + let peer2 = *litep2p2.local_peer_id(); + + connect_peers(&mut litep2p1, &mut litep2p2).await; + + let (outbound_tx, outbound_rx) = tracing_unbounded("outbound-request", 1000); + let senders = HashMap::from_iter([(ProtocolName::from("/protocol/1"), outbound_tx)]); + let (tx, rx) = async_channel::bounded(4); + + let protocol = RequestResponseProtocol::new( + ProtocolName::from("/protocol/1"), + handle1, + Arc::new(peerstore_handle_test()), + Some(tx), + outbound_rx, + senders, + None, + ); + + tokio::spawn(protocol.run()); + tokio::spawn(async move { while let Some(_) = litep2p1.next_event().await {} }); + tokio::spawn(async move { while let Some(_) = litep2p2.next_event().await {} }); + + let request_id = handle2 + .send_request(peer1, vec![1, 2, 3, 4], DialOptions::Reject) + .await + .unwrap(); + + let rx = match rx.recv().await { + Ok(IncomingRequest { peer, payload, pending_response }) => { + assert_eq!(peer, peer2.into()); + assert_eq!(payload, vec![1, 2, 3, 4]); + + let (tx, rx) = oneshot::channel(); + pending_response + .send(OutgoingResponse { + result: Ok(vec![5, 6, 7, 8]), + reputation_changes: Vec::new(), + sent_feedback: Some(tx), + }) + .unwrap(); + rx + }, + event => panic!("invalid event: {event:?}"), + }; + + match handle2.next().await { + Some(RequestResponseEvent::ResponseReceived { + peer, + request_id: received_id, + response, + .. + }) => { + assert_eq!(peer, peer1); + assert_eq!(request_id, received_id); + assert_eq!(response, vec![5, 6, 7, 8]); + assert!(rx.await.is_ok()); + }, + event => panic!("invalid event: {event:?}"), + } +} + +#[tokio::test] +async fn fallback_request_compatible_peers() { + // `litep2p1` supports both the new and the old protocol + let (mut litep2p1, handle1_1, handle1_2) = { + let (config1, handle1) = ConfigBuilder::new(litep2p::ProtocolName::from("/protocol/2")) + .with_max_size(1024) + .build(); + + let (config2, handle2) = ConfigBuilder::new(litep2p::ProtocolName::from("/protocol/1")) + .with_max_size(1024) + .build(); + ( + Litep2p::new( + Litep2pConfigBuilder::new() + .with_request_response_protocol(config1) + .with_request_response_protocol(config2) + .with_tcp(TcpConfig { + listen_addresses: vec![ + "/ip4/0.0.0.0/tcp/0".parse().unwrap(), + "/ip6/::/tcp/0".parse().unwrap(), + ], + ..Default::default() + }) + .build(), + ) + .unwrap(), + handle1, + handle2, + ) + }; + + // `litep2p2` supports only the new protocol + let (config2, handle2) = ConfigBuilder::new(litep2p::ProtocolName::from("/protocol/2")) + .with_max_size(1024) + .build(); + + let mut litep2p2 = Litep2p::new( + Litep2pConfigBuilder::new() + .with_request_response_protocol(config2) + .with_tcp(TcpConfig { + listen_addresses: vec![ + "/ip4/0.0.0.0/tcp/0".parse().unwrap(), + "/ip6/::/tcp/0".parse().unwrap(), + ], + ..Default::default() + }) + .build(), + ) + .unwrap(); + + let peer1 = *litep2p1.local_peer_id(); + let peer2 = *litep2p2.local_peer_id(); + + connect_peers(&mut litep2p1, &mut litep2p2).await; + + let (outbound_tx1, outbound_rx1) = tracing_unbounded("outbound-request", 1000); + let (outbound_tx_fallback, outbound_rx_fallback) = tracing_unbounded("outbound-request", 1000); + + let senders1 = HashMap::from_iter([ + (ProtocolName::from("/protocol/2"), outbound_tx1.clone()), + (ProtocolName::from("/protocol/1"), outbound_tx_fallback), + ]); + + let (tx1, _rx1) = async_channel::bounded(4); + let protocol1 = RequestResponseProtocol::new( + ProtocolName::from("/protocol/2"), + handle1_1, + Arc::new(peerstore_handle_test()), + Some(tx1), + outbound_rx1, + senders1.clone(), + None, + ); + + let (tx_fallback, _rx_fallback) = async_channel::bounded(4); + let protocol_fallback = RequestResponseProtocol::new( + ProtocolName::from("/protocol/1"), + handle1_2, + Arc::new(peerstore_handle_test()), + Some(tx_fallback), + outbound_rx_fallback, + senders1, + None, + ); + + let (outbound_tx2, outbound_rx2) = tracing_unbounded("outbound-request", 1000); + let senders2 = HashMap::from_iter([(ProtocolName::from("/protocol/2"), outbound_tx2)]); + + let (tx2, rx2) = async_channel::bounded(4); + let protocol2 = RequestResponseProtocol::new( + ProtocolName::from("/protocol/2"), + handle2, + Arc::new(peerstore_handle_test()), + Some(tx2), + outbound_rx2, + senders2, + None, + ); + + tokio::spawn(protocol1.run()); + tokio::spawn(protocol2.run()); + tokio::spawn(protocol_fallback.run()); + tokio::spawn(async move { while let Some(_) = litep2p1.next_event().await {} }); + tokio::spawn(async move { while let Some(_) = litep2p2.next_event().await {} }); + + let (result_tx, result_rx) = oneshot::channel(); + outbound_tx1 + .unbounded_send(OutboundRequest { + peer: peer2.into(), + request: vec![1, 2, 3, 4], + sender: result_tx, + fallback_request: Some((vec![1, 3, 3, 7], ProtocolName::from("/protocol/1"))), + dial_behavior: IfDisconnected::ImmediateError, + }) + .unwrap(); + + match rx2.recv().await { + Ok(IncomingRequest { peer, payload, pending_response }) => { + assert_eq!(peer, peer1.into()); + assert_eq!(payload, vec![1, 2, 3, 4]); + pending_response + .send(OutgoingResponse { + result: Ok(vec![5, 6, 7, 8]), + reputation_changes: Vec::new(), + sent_feedback: None, + }) + .unwrap(); + }, + event => panic!("invalid event: {event:?}"), + } + + match result_rx.await { + Ok(Ok((response, protocol))) => { + assert_eq!(response, vec![5, 6, 7, 8]); + assert_eq!(protocol, ProtocolName::from("/protocol/2")); + }, + event => panic!("invalid event: {event:?}"), + } +} + +#[tokio::test] +async fn fallback_request_old_peer_receives() { + sp_tracing::try_init_simple(); + + // `litep2p1` supports both the new and the old protocol + let (mut litep2p1, handle1_1, handle1_2) = { + let (config1, handle1) = ConfigBuilder::new(litep2p::ProtocolName::from("/protocol/2")) + .with_max_size(1024) + .build(); + + let (config2, handle2) = ConfigBuilder::new(litep2p::ProtocolName::from("/protocol/1")) + .with_max_size(1024) + .build(); + ( + Litep2p::new( + Litep2pConfigBuilder::new() + .with_request_response_protocol(config1) + .with_request_response_protocol(config2) + .with_tcp(TcpConfig { + listen_addresses: vec![ + "/ip4/0.0.0.0/tcp/0".parse().unwrap(), + "/ip6/::/tcp/0".parse().unwrap(), + ], + ..Default::default() + }) + .build(), + ) + .unwrap(), + handle1, + handle2, + ) + }; + + // `litep2p2` supports only the new protocol + let (config2, handle2) = ConfigBuilder::new(litep2p::ProtocolName::from("/protocol/1")) + .with_max_size(1024) + .build(); + + let mut litep2p2 = Litep2p::new( + Litep2pConfigBuilder::new() + .with_request_response_protocol(config2) + .with_tcp(TcpConfig { + listen_addresses: vec![ + "/ip4/0.0.0.0/tcp/0".parse().unwrap(), + "/ip6/::/tcp/0".parse().unwrap(), + ], + ..Default::default() + }) + .build(), + ) + .unwrap(); + + let peer1 = *litep2p1.local_peer_id(); + let peer2 = *litep2p2.local_peer_id(); + + connect_peers(&mut litep2p1, &mut litep2p2).await; + + let (outbound_tx1, outbound_rx1) = tracing_unbounded("outbound-request", 1000); + let (outbound_tx_fallback, outbound_rx_fallback) = tracing_unbounded("outbound-request", 1000); + + let senders1 = HashMap::from_iter([ + (ProtocolName::from("/protocol/2"), outbound_tx1.clone()), + (ProtocolName::from("/protocol/1"), outbound_tx_fallback), + ]); + + let (tx1, _rx1) = async_channel::bounded(4); + let protocol1 = RequestResponseProtocol::new( + ProtocolName::from("/protocol/2"), + handle1_1, + Arc::new(peerstore_handle_test()), + Some(tx1), + outbound_rx1, + senders1.clone(), + None, + ); + + let (tx_fallback, _rx_fallback) = async_channel::bounded(4); + let protocol_fallback = RequestResponseProtocol::new( + ProtocolName::from("/protocol/1"), + handle1_2, + Arc::new(peerstore_handle_test()), + Some(tx_fallback), + outbound_rx_fallback, + senders1, + None, + ); + + let (outbound_tx2, outbound_rx2) = tracing_unbounded("outbound-request", 1000); + let senders2 = HashMap::from_iter([(ProtocolName::from("/protocol/1"), outbound_tx2)]); + + let (tx2, rx2) = async_channel::bounded(4); + let protocol2 = RequestResponseProtocol::new( + ProtocolName::from("/protocol/1"), + handle2, + Arc::new(peerstore_handle_test()), + Some(tx2), + outbound_rx2, + senders2, + None, + ); + + tokio::spawn(protocol1.run()); + tokio::spawn(protocol2.run()); + tokio::spawn(protocol_fallback.run()); + tokio::spawn(async move { while let Some(_) = litep2p1.next_event().await {} }); + tokio::spawn(async move { while let Some(_) = litep2p2.next_event().await {} }); + + let (result_tx, result_rx) = oneshot::channel(); + outbound_tx1 + .unbounded_send(OutboundRequest { + peer: peer2.into(), + request: vec![1, 2, 3, 4], + sender: result_tx, + fallback_request: Some((vec![1, 3, 3, 7], ProtocolName::from("/protocol/1"))), + dial_behavior: IfDisconnected::ImmediateError, + }) + .unwrap(); + + match rx2.recv().await { + Ok(IncomingRequest { peer, payload, pending_response }) => { + assert_eq!(peer, peer1.into()); + assert_eq!(payload, vec![1, 3, 3, 7]); + pending_response + .send(OutgoingResponse { + result: Ok(vec![1, 3, 3, 8]), + reputation_changes: Vec::new(), + sent_feedback: None, + }) + .unwrap(); + }, + event => panic!("invalid event: {event:?}"), + } + + match result_rx.await { + Ok(Ok((response, protocol))) => { + assert_eq!(response, vec![1, 3, 3, 8]); + assert_eq!(protocol, ProtocolName::from("/protocol/1")); + }, + event => panic!("invalid event: {event:?}"), + } +} + +#[tokio::test] +async fn fallback_request_old_peer_sends() { + sp_tracing::try_init_simple(); + + // `litep2p1` supports both the new and the old protocol + let (mut litep2p1, handle1_1, handle1_2) = { + let (config1, handle1) = ConfigBuilder::new(litep2p::ProtocolName::from("/protocol/2")) + .with_max_size(1024) + .build(); + + let (config2, handle2) = ConfigBuilder::new(litep2p::ProtocolName::from("/protocol/1")) + .with_max_size(1024) + .build(); + ( + Litep2p::new( + Litep2pConfigBuilder::new() + .with_request_response_protocol(config1) + .with_request_response_protocol(config2) + .with_tcp(TcpConfig { + listen_addresses: vec![ + "/ip4/0.0.0.0/tcp/0".parse().unwrap(), + "/ip6/::/tcp/0".parse().unwrap(), + ], + ..Default::default() + }) + .build(), + ) + .unwrap(), + handle1, + handle2, + ) + }; + + // `litep2p2` supports only the new protocol + let (config2, handle2) = ConfigBuilder::new(litep2p::ProtocolName::from("/protocol/1")) + .with_max_size(1024) + .build(); + + let mut litep2p2 = Litep2p::new( + Litep2pConfigBuilder::new() + .with_request_response_protocol(config2) + .with_tcp(TcpConfig { + listen_addresses: vec![ + "/ip4/0.0.0.0/tcp/0".parse().unwrap(), + "/ip6/::/tcp/0".parse().unwrap(), + ], + ..Default::default() + }) + .build(), + ) + .unwrap(); + + let peer1 = *litep2p1.local_peer_id(); + let peer2 = *litep2p2.local_peer_id(); + + connect_peers(&mut litep2p1, &mut litep2p2).await; + + let (outbound_tx1, outbound_rx1) = tracing_unbounded("outbound-request", 1000); + let (outbound_tx_fallback, outbound_rx_fallback) = tracing_unbounded("outbound-request", 1000); + + let senders1 = HashMap::from_iter([ + (ProtocolName::from("/protocol/2"), outbound_tx1.clone()), + (ProtocolName::from("/protocol/1"), outbound_tx_fallback), + ]); + + let (tx1, _rx1) = async_channel::bounded(4); + let protocol1 = RequestResponseProtocol::new( + ProtocolName::from("/protocol/2"), + handle1_1, + Arc::new(peerstore_handle_test()), + Some(tx1), + outbound_rx1, + senders1.clone(), + None, + ); + + let (tx_fallback, rx_fallback) = async_channel::bounded(4); + let protocol_fallback = RequestResponseProtocol::new( + ProtocolName::from("/protocol/1"), + handle1_2, + Arc::new(peerstore_handle_test()), + Some(tx_fallback), + outbound_rx_fallback, + senders1, + None, + ); + + let (outbound_tx2, outbound_rx2) = tracing_unbounded("outbound-request", 1000); + let senders2 = HashMap::from_iter([(ProtocolName::from("/protocol/1"), outbound_tx2.clone())]); + + let (tx2, _rx2) = async_channel::bounded(4); + let protocol2 = RequestResponseProtocol::new( + ProtocolName::from("/protocol/1"), + handle2, + Arc::new(peerstore_handle_test()), + Some(tx2), + outbound_rx2, + senders2, + None, + ); + + tokio::spawn(protocol1.run()); + tokio::spawn(protocol2.run()); + tokio::spawn(protocol_fallback.run()); + tokio::spawn(async move { while let Some(_) = litep2p1.next_event().await {} }); + tokio::spawn(async move { while let Some(_) = litep2p2.next_event().await {} }); + + let (result_tx, result_rx) = oneshot::channel(); + outbound_tx2 + .unbounded_send(OutboundRequest { + peer: peer1.into(), + request: vec![1, 2, 3, 4], + sender: result_tx, + fallback_request: None, + dial_behavior: IfDisconnected::ImmediateError, + }) + .unwrap(); + + match rx_fallback.recv().await { + Ok(IncomingRequest { peer, payload, pending_response }) => { + assert_eq!(peer, peer2.into()); + assert_eq!(payload, vec![1, 2, 3, 4]); + pending_response + .send(OutgoingResponse { + result: Ok(vec![1, 3, 3, 8]), + reputation_changes: Vec::new(), + sent_feedback: None, + }) + .unwrap(); + }, + event => panic!("invalid event: {event:?}"), + } + + match result_rx.await { + Ok(Ok((response, protocol))) => { + assert_eq!(response, vec![1, 3, 3, 8]); + assert_eq!(protocol, ProtocolName::from("/protocol/1")); + }, + event => panic!("invalid event: {event:?}"), + } +} + +#[tokio::test] +async fn old_protocol_supported_but_no_fallback_provided() { + sp_tracing::try_init_simple(); + + // `litep2p1` supports both the new and the old protocol + let (mut litep2p1, handle1_1, handle1_2) = { + let (config1, handle1) = ConfigBuilder::new(litep2p::ProtocolName::from("/protocol/2")) + .with_max_size(1024) + .build(); + + let (config2, handle2) = ConfigBuilder::new(litep2p::ProtocolName::from("/protocol/1")) + .with_max_size(1024) + .build(); + ( + Litep2p::new( + Litep2pConfigBuilder::new() + .with_request_response_protocol(config1) + .with_request_response_protocol(config2) + .with_tcp(TcpConfig { + listen_addresses: vec![ + "/ip4/0.0.0.0/tcp/0".parse().unwrap(), + "/ip6/::/tcp/0".parse().unwrap(), + ], + ..Default::default() + }) + .build(), + ) + .unwrap(), + handle1, + handle2, + ) + }; + + // `litep2p2` supports only the old protocol + let (config2, handle2) = ConfigBuilder::new(litep2p::ProtocolName::from("/protocol/1")) + .with_max_size(1024) + .build(); + + let mut litep2p2 = Litep2p::new( + Litep2pConfigBuilder::new() + .with_request_response_protocol(config2) + .with_tcp(TcpConfig { + listen_addresses: vec![ + "/ip4/0.0.0.0/tcp/0".parse().unwrap(), + "/ip6/::/tcp/0".parse().unwrap(), + ], + ..Default::default() + }) + .build(), + ) + .unwrap(); + + let peer2 = *litep2p2.local_peer_id(); + + connect_peers(&mut litep2p1, &mut litep2p2).await; + + let (outbound_tx1, outbound_rx1) = tracing_unbounded("outbound-request", 1000); + let (outbound_tx_fallback, outbound_rx_fallback) = tracing_unbounded("outbound-request", 1000); + + let senders1 = HashMap::from_iter([ + (ProtocolName::from("/protocol/2"), outbound_tx1.clone()), + (ProtocolName::from("/protocol/1"), outbound_tx_fallback), + ]); + + let (tx1, _rx1) = async_channel::bounded(4); + let protocol1 = RequestResponseProtocol::new( + ProtocolName::from("/protocol/2"), + handle1_1, + Arc::new(peerstore_handle_test()), + Some(tx1), + outbound_rx1, + senders1.clone(), + None, + ); + + let (tx_fallback, _rx_fallback) = async_channel::bounded(4); + let protocol_fallback = RequestResponseProtocol::new( + ProtocolName::from("/protocol/1"), + handle1_2, + Arc::new(peerstore_handle_test()), + Some(tx_fallback), + outbound_rx_fallback, + senders1, + None, + ); + + let (outbound_tx2, outbound_rx2) = tracing_unbounded("outbound-request", 1000); + let senders2 = HashMap::from_iter([(ProtocolName::from("/protocol/1"), outbound_tx2)]); + + let (tx2, _rx2) = async_channel::bounded(4); + let protocol2 = RequestResponseProtocol::new( + ProtocolName::from("/protocol/1"), + handle2, + Arc::new(peerstore_handle_test()), + Some(tx2), + outbound_rx2, + senders2, + None, + ); + + tokio::spawn(protocol1.run()); + tokio::spawn(protocol2.run()); + tokio::spawn(protocol_fallback.run()); + tokio::spawn(async move { while let Some(_) = litep2p1.next_event().await {} }); + tokio::spawn(async move { while let Some(_) = litep2p2.next_event().await {} }); + + let (result_tx, result_rx) = oneshot::channel(); + outbound_tx1 + .unbounded_send(OutboundRequest { + peer: peer2.into(), + request: vec![1, 2, 3, 4], + sender: result_tx, + fallback_request: None, + dial_behavior: IfDisconnected::ImmediateError, + }) + .unwrap(); + + match result_rx.await { + Ok(Err(error)) => { + assert!(std::matches!(error, RequestFailure::Refused)); + }, + event => panic!("invalid event: {event:?}"), + } +} diff --git a/client/network/src/service.rs b/client/network/src/service.rs index 93467ef3..4236ea52 100644 --- a/client/network/src/service.rs +++ b/client/network/src/service.rs @@ -32,7 +32,7 @@ use crate::{ bitswap::BitswapRequestHandler, config::{ parse_addr, FullNetworkConfiguration, IncomingRequest, MultiaddrWithPeerId, - NetworkBackendType, NonDefaultSetConfig, NotificationHandshake, Params, SetConfig, + NonDefaultSetConfig, NotificationHandshake, Params, SetConfig, TransportConfig, }, discovery::DiscoveryConfig, @@ -274,13 +274,9 @@ where .. } = params.network_config; - // This fork only implements the Libp2p backend (with Dilithium). Reject Litep2p explicitly. - if !matches!(network_config.network_backend, NetworkBackendType::Libp2p) { - return Err(Error::Io(std::io::Error::new( - std::io::ErrorKind::Unsupported, - "This build only supports the Libp2p network backend. Litep2p is not implemented.", - ))) - } + // Note: This NetworkWorker is specifically for the Libp2p backend. + // The Litep2p backend uses Litep2pNetworkBackend instead. + // Both backends now support Dilithium (post-quantum). // Store before network_config is moved. let disable_peer_address_filtering = network_config.disable_peer_address_filtering; @@ -290,13 +286,15 @@ where let local_public = local_identity.public(); let local_peer_id: PeerId = local_public.to_peer_id().into(); - // For transport and behaviour we need libp2p::identity types (this fork only has Libp2p - // variant). + // For transport and behaviour we need libp2p::identity types. + // Note: This NetworkWorker is the libp2p backend implementation. + // The litep2p backend uses Litep2pNetworkBackend in client/network/src/litep2p/. let local_identity_for_transport = match &local_identity { Keypair::Libp2p(kp) => kp.clone(), }; let local_public_libp2p = match &local_identity.public() { PublicKey::Libp2p(p) => p.clone(), + PublicKey::Litep2p(_) => unreachable!("NetworkWorker (libp2p backend) only uses libp2p keys"), }; network_config.boot_nodes = network_config diff --git a/client/network/src/service/signature.rs b/client/network/src/service/signature.rs index c96fc33a..22c06b76 100644 --- a/client/network/src/service/signature.rs +++ b/client/network/src/service/signature.rs @@ -26,6 +26,8 @@ pub use libp2p::identity::{DecodingError, SigningError}; pub enum PublicKey { /// Libp2p public key (ed25519 or Dilithium from libp2p-identity). Libp2p(libp2p::identity::PublicKey), + /// Litep2p public key (Dilithium only in this fork). + Litep2p(litep2p::crypto::PublicKey), } impl PublicKey { @@ -33,6 +35,7 @@ impl PublicKey { pub fn encode_protobuf(&self) -> Vec { match self { Self::Libp2p(public) => public.encode_protobuf(), + Self::Litep2p(public) => public.to_protobuf_encoding(), } } @@ -40,6 +43,10 @@ impl PublicKey { pub fn to_peer_id(&self) -> sc_network_types::PeerId { match self { Self::Libp2p(public) => public.to_peer_id().into(), + Self::Litep2p(public) => { + let litep2p_peer_id: litep2p::PeerId = public.to_peer_id(); + litep2p_peer_id.into() + }, } } @@ -52,6 +59,7 @@ impl PublicKey { pub fn verify(&self, msg: &[u8], sig: &[u8]) -> bool { match self { Self::Libp2p(public) => public.verify(msg, sig), + Self::Litep2p(public) => public.verify(msg, sig), } } } diff --git a/client/network/src/types.rs b/client/network/src/types.rs index 5444a1e0..ca690a8d 100644 --- a/client/network/src/types.rs +++ b/client/network/src/types.rs @@ -96,6 +96,22 @@ impl AsRef for ProtocolName { } } +impl From for litep2p::ProtocolName { + fn from(name: ProtocolName) -> Self { + match name { + ProtocolName::Static(s) => litep2p::ProtocolName::from(s), + ProtocolName::OnHeap(s) => litep2p::ProtocolName::from(s), + } + } +} + +impl From for ProtocolName { + fn from(name: litep2p::ProtocolName) -> Self { + // litep2p::ProtocolName derefs to str, so we can get the string content + ProtocolName::OnHeap(Arc::from(&*name)) + } +} + #[cfg(test)] mod tests { use super::ProtocolName; diff --git a/node/src/command.rs b/node/src/command.rs index 935116af..bb766214 100644 --- a/node/src/command.rs +++ b/node/src/command.rs @@ -511,7 +511,8 @@ pub fn run() -> sc_cli::Result<()> { config.network.node_key = NodeKeyConfig::Dilithium(Secret::File(key_path)); - config.network.network_backend = NetworkBackendType::Libp2p; + // Network backend is set via --network-backend flag (handled by sc_cli) + // Both libp2p and litep2p backends use Dilithium for node identity let rewards_account = match cli.rewards_inner_hash { Some(ref inner_hash) => { @@ -585,22 +586,43 @@ pub fn run() -> sc_cli::Result<()> { // Allow mining without peers if --dev or --force-authoring is set let allow_mining_without_peers = config.force_authoring; - service::new_full::< - sc_network::NetworkWorker< - quantus_runtime::opaque::Block, - ::Hash, - >, - >( - config, - rewards_account, - cli.miner_listen_port, - cli.enable_peer_sharing, - cli.sync_max_timeouts_before_drop, - cli.sync_disable_major_sync_gating, - cli.sync_block_request_timeout, - allow_mining_without_peers, - ) - .map_err(sc_cli::Error::Service) + match config.network.network_backend { + NetworkBackendType::Libp2p => { + log::info!("Using libp2p network backend (with Dilithium)"); + service::new_full::< + sc_network::NetworkWorker< + quantus_runtime::opaque::Block, + ::Hash, + >, + >( + config, + rewards_account, + cli.miner_listen_port, + cli.enable_peer_sharing, + cli.sync_max_timeouts_before_drop, + cli.sync_disable_major_sync_gating, + cli.sync_block_request_timeout, + allow_mining_without_peers, + ) + .map_err(sc_cli::Error::Service) + } + NetworkBackendType::Litep2p => { + log::info!("Using litep2p network backend (with Dilithium)"); + service::new_full::< + sc_network::litep2p::Litep2pNetworkBackend, + >( + config, + rewards_account, + cli.miner_listen_port, + cli.enable_peer_sharing, + cli.sync_max_timeouts_before_drop, + cli.sync_disable_major_sync_gating, + cli.sync_block_request_timeout, + allow_mining_without_peers, + ) + .map_err(sc_cli::Error::Service) + } + } }) }, } From 83d9a5e8fc2e0bd804f88e5e5952f36b75ecff02 Mon Sep 17 00:00:00 2001 From: illuzen Date: Fri, 29 May 2026 21:29:14 +0900 Subject: [PATCH 09/26] use clatter instead of snow --- Cargo.lock | 21 +- Cargo.toml | 3 +- client/litep2p/Cargo.toml | 4 +- client/litep2p/src/crypto/noise/mod.rs | 865 +++++++----------- client/litep2p/src/crypto/noise/protocol.rs | 416 +++++++-- .../litep2p/src/crypto/noise/x25519_spec.rs | 118 --- client/litep2p/src/error.rs | 14 +- client/litep2p/src/schema/keys.proto | 8 +- client/network/src/litep2p/mod.rs | 2 +- 9 files changed, 707 insertions(+), 744 deletions(-) delete mode 100644 client/litep2p/src/crypto/noise/x25519_spec.rs diff --git a/Cargo.lock b/Cargo.lock index 39e3882b..65f9bf99 100644 --- a/Cargo.lock +++ b/Cargo.lock @@ -5633,6 +5633,7 @@ dependencies = [ "bs58", "bytes 1.11.1", "cid 0.11.1", + "clatter", "enum-display", "futures 0.3.31", "futures-timer", @@ -5665,7 +5666,6 @@ dependencies = [ "sha2 0.10.9", "simple-dns", "smallvec", - "snow", "socket2 0.5.10", "str0m", "thiserror 2.0.18", @@ -11295,25 +11295,6 @@ version = "1.1.1" source = "registry+https://github.com/rust-lang/crates.io-index" checksum = "1b6b67fb9a61334225b5b790716f609cd58395f895b3fe8b328786812a40bc3b" -[[package]] -name = "snow" -version = "0.10.0" -source = "registry+https://github.com/rust-lang/crates.io-index" -checksum = "599b506ccc4aff8cf7844bc42cf783009a434c1e26c964432560fb6d6ad02d82" -dependencies = [ - "aes-gcm", - "blake2 0.10.6", - "chacha20poly1305", - "curve25519-dalek", - "getrandom 0.3.3", - "pqcrypto-kyber", - "pqcrypto-traits", - "ring 0.17.14", - "rustc_version", - "sha2 0.10.9", - "subtle 2.6.1", -] - [[package]] name = "socket2" version = "0.5.10" diff --git a/Cargo.toml b/Cargo.toml index 33251a62..b7cca92d 100644 --- a/Cargo.toml +++ b/Cargo.toml @@ -113,7 +113,8 @@ serde_json = { version = "1.0.132", default-features = false } sha2 = { version = "0.10", default-features = false } sha3 = { version = "0.10", default-features = false } smallvec = { version = "1.11.0", default-features = false } -snow = { version = "0.10.0" } +# Noise protocol - clatter for pqxx pattern with ML-KEM 768 (FIPS 203) +clatter = { version = "1.1.0" } sp-keystore = { version = "0.45.0", default-features = true } sp-state-machine = { version = "0.49.0", default-features = false } tempfile = { version = "3.8.1" } diff --git a/client/litep2p/Cargo.toml b/client/litep2p/Cargo.toml index 73998ae3..a6205f93 100644 --- a/client/litep2p/Cargo.toml +++ b/client/litep2p/Cargo.toml @@ -33,8 +33,8 @@ serde = { workspace = true } sha2 = { workspace = true } simple-dns = "0.11.0" smallvec = { workspace = true } -# Noise protocol with post-quantum HFS (Hybrid Forward Secrecy) -snow = { workspace = true, features = ["default-resolver", "ring-resolver", "hfs", "use-pqcrypto-kyber1024"] } +# Noise protocol with post-quantum pqxx pattern (ML-KEM 768 / FIPS 203) +clatter = { workspace = true } socket2 = { version = "0.5.9", features = ["all"] } thiserror = "2.0.12" tokio = { workspace = true, features = ["rt", "net", "io-util", "time", "macros", "sync", "parking_lot"] } diff --git a/client/litep2p/src/crypto/noise/mod.rs b/client/litep2p/src/crypto/noise/mod.rs index ef581c01..3bea109a 100644 --- a/client/litep2p/src/crypto/noise/mod.rs +++ b/client/litep2p/src/crypto/noise/mod.rs @@ -1,5 +1,6 @@ // Copyright 2019 Parity Technologies (UK) Ltd. // Copyright 2023 litep2p developers +// Copyright 2025 Quantus Network developers // // Permission is hereby granted, free of charge, to any person obtaining a // copy of this software and associated documentation files (the "Software"), @@ -19,7 +20,18 @@ // FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER // DEALINGS IN THE SOFTWARE. -//! Noise handshake and transport implementations. +//! Noise handshake and transport implementations using pqXX pattern with ML-KEM 768. +//! +//! This module implements the Noise protocol using Clatter with the pqXX handshake pattern +//! and ML-KEM 768 (FIPS 203) for post-quantum key encapsulation. This provides ~192-bit +//! security against quantum attacks. +//! +//! ## Handshake Flow (pqXX - 4 messages) +//! +//! 1. Initiator -> Responder: `e` (ephemeral KEM public key) +//! 2. Responder -> Initiator: `ekem, e, es` + identity payload +//! 3. Initiator -> Responder: `skem, s, se` + identity payload +//! 4. Responder -> Initiator: `sks` (final KEM, empty payload) use crate::{ config::Role, @@ -31,7 +43,6 @@ use crate::{ use bytes::{Buf, Bytes, BytesMut}; use futures::io::{AsyncRead, AsyncReadExt, AsyncWrite, AsyncWriteExt}; use prost::Message; -use snow::{Builder, HandshakeState, TransportState}; use std::{ fmt, io, @@ -40,21 +51,22 @@ use std::{ }; mod protocol; -mod x25519_spec; + +pub use protocol::{ + Keypair as NoiseKeypair, PublicKey as NoisePublicKey, SecretKey as NoiseSecretKey, + ML_KEM_768_CIPHERTEXT_SIZE, ML_KEM_768_PUBLIC_KEY_SIZE, ML_KEM_768_SECRET_KEY_SIZE, +}; +use protocol::{ClatterSession, ClatterTransport}; mod handshake_schema { include!(concat!(env!("OUT_DIR"), "/noise.rs")); } -/// Noise parameters with post-quantum Hybrid Forward Secrecy (HFS). -/// Uses XX pattern with X25519 + Kyber1024 for quantum-resistant key exchange. -const NOISE_PARAMETERS: &str = "Noise_XXhfs_25519+Kyber1024_ChaChaPoly_SHA256"; - /// Prefix of static key signatures for domain separation. pub(crate) const STATIC_KEY_DOMAIN: &str = "noise-libp2p-static-key:"; /// Maximum Noise message size. -const MAX_NOISE_MSG_LEN: usize = 65536; +const MAX_NOISE_MSG_LEN: usize = u16::MAX as usize; /// Space given to the encryption buffer to hold key material. const NOISE_EXTRA_ENCRYPT_SPACE: usize = 16; @@ -74,24 +86,34 @@ pub const MAX_FRAME_LEN: usize = MAX_NOISE_MSG_LEN - NOISE_EXTRA_ENCRYPT_SPACE; /// Logging target for the file. const LOG_TARGET: &str = "litep2p::crypto::noise"; +/// Buffer size for ML-KEM 768 handshake messages. +/// - ML-KEM 768 public key: 1184 bytes +/// - ML-KEM 768 ciphertext: 1088 bytes +/// - Dilithium identity payload: ~7230 bytes +/// - Noise overhead: ~64 bytes +const HANDSHAKE_BUFFER_SIZE: usize = 16384; + #[derive(Debug)] -#[allow(clippy::large_enum_variant)] enum NoiseState { - Handshake(HandshakeState), - Transport(TransportState), + Handshake(ClatterSession), + Transport(ClatterTransport), } pub struct NoiseContext { - keypair: snow::Keypair, + /// ML-KEM 768 keypair for the Noise static key + kem_keypair: protocol::Keypair, + /// Clatter session/transport state noise: NoiseState, + /// Role (dialer/listener) role: Role, + /// Identity payload (Dilithium public key + signature over KEM public key) pub payload: Vec, } impl fmt::Debug for NoiseContext { fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { f.debug_struct("NoiseContext") - .field("public", &self.noise) + .field("noise", &self.noise) .field("payload", &self.payload) .field("role", &self.role) .finish() @@ -101,15 +123,16 @@ impl fmt::Debug for NoiseContext { impl NoiseContext { /// Assemble Noise payload and return [`NoiseContext`]. fn assemble( - noise: snow::HandshakeState, - keypair: snow::Keypair, + session: ClatterSession, + kem_keypair: protocol::Keypair, id_keys: &Keypair, role: Role, ) -> Result { + // Sign the ML-KEM public key with the Dilithium identity key let noise_payload = handshake_schema::NoiseHandshakePayload { identity_key: Some(PublicKey::from(id_keys.public()).to_protobuf_encoding()), identity_sig: Some( - id_keys.sign(&[STATIC_KEY_DOMAIN.as_bytes(), keypair.public.as_ref()].concat()), + id_keys.sign(&[STATIC_KEY_DOMAIN.as_bytes(), kem_keypair.public().as_ref()].concat()), ), ..Default::default() }; @@ -118,51 +141,35 @@ impl NoiseContext { noise_payload.encode(&mut payload).map_err(ParseError::from)?; Ok(Self { - noise: NoiseState::Handshake(noise), - keypair, + noise: NoiseState::Handshake(session), + kem_keypair, payload, role, }) } + /// Create a new NoiseContext for the pqXX handshake. pub fn new(keypair: &Keypair, role: Role) -> Result { - tracing::trace!(target: LOG_TARGET, ?role, "create new noise configuration"); + tracing::trace!(target: LOG_TARGET, ?role, "create new noise configuration (pqXX + ML-KEM 768)"); - let builder: Builder<'_> = Builder::with_resolver( - NOISE_PARAMETERS.parse().expect("qed; Valid noise pattern"), - Box::new(protocol::Resolver), - ); - - let dh_keypair = builder.generate_keypair()?; - let static_key = &dh_keypair.private; + // Generate ML-KEM 768 keypair for Noise static key + let kem_keypair = protocol::Keypair::new(); - let noise = match role { - Role::Dialer => builder.local_private_key(static_key)?.build_initiator()?, - Role::Listener => builder.local_private_key(static_key)?.build_responder()?, - }; + let is_initiator = matches!(role, Role::Dialer); + let session = ClatterSession::new(&[], is_initiator, &kem_keypair)?; - Self::assemble(noise, dh_keypair, keypair, role) + Self::assemble(session, kem_keypair, keypair, role) } - /// Create new [`NoiseContext`] with prologue. + /// Create new [`NoiseContext`] with prologue (for WebRTC). #[cfg(feature = "webrtc")] pub fn with_prologue(id_keys: &Keypair, prologue: Vec) -> Result { - let noise: Builder<'_> = Builder::with_resolver( - NOISE_PARAMETERS.parse().expect("qed; Valid noise pattern"), - Box::new(protocol::Resolver), - ); - - let keypair = noise.generate_keypair()?; - - let noise = noise - .local_private_key(&keypair.private)? - .prologue(&prologue) - .build_initiator()?; - - Self::assemble(noise, keypair, id_keys, Role::Dialer) + let kem_keypair = protocol::Keypair::new(); + let session = ClatterSession::new(&prologue, true, &kem_keypair)?; + Self::assemble(session, kem_keypair, id_keys, Role::Dialer) } - /// Get remote peer ID from the received Noise payload. + /// Get remote peer ID from the received Noise payload (for WebRTC). #[cfg(feature = "webrtc")] pub fn get_remote_peer_id(&mut self, reply: &[u8]) -> Result { if reply.len() < 2 { @@ -179,13 +186,13 @@ impl NoiseContext { let mut buffer = vec![0u8; len]; - let NoiseState::Handshake(ref mut noise) = self.noise else { - tracing::error!(target: LOG_TARGET, "invalid state to read the second handshake message"); + let NoiseState::Handshake(ref mut session) = self.noise else { + tracing::error!(target: LOG_TARGET, "invalid state to read the handshake message"); debug_assert!(false); return Err(NegotiationError::StateMismatch); }; - let res = noise.read_message(reply, &mut buffer)?; + let res = session.read_message(reply, &mut buffer)?; buffer.truncate(res); let payload = handshake_schema::NoiseHandshakePayload::decode(buffer.as_slice()) @@ -195,26 +202,24 @@ impl NoiseContext { Ok(PeerId::from_public_key_protobuf(&identity)) } - /// Get first message. + /// Get first message (pqXX message 1: -> e). /// - /// Listener only sends one message (the payload) + /// For initiator: sends ephemeral KEM public key + /// For listener: sends message 2 (identity payload) pub fn first_message(&mut self, role: Role) -> Result, NegotiationError> { match role { Role::Dialer => { - tracing::trace!(target: LOG_TARGET, "get noise dialer first message"); + tracing::trace!(target: LOG_TARGET, "get noise dialer first message (-> e)"); - let NoiseState::Handshake(ref mut noise) = self.noise else { - tracing::error!(target: LOG_TARGET, "invalid state to read the first handshake message"); + let NoiseState::Handshake(ref mut session) = self.noise else { + tracing::error!(target: LOG_TARGET, "invalid state to write the first handshake message"); debug_assert!(false); return Err(NegotiationError::StateMismatch); }; - // HFS with Kyber1024 requires larger buffers: - // - X25519 public key: 32 bytes - // - Kyber1024 public key: 1568 bytes - // - Plus Noise overhead - let mut buffer = vec![0u8; 4096]; - let nwritten = noise.write_message(&[], &mut buffer)?; + // pqXX message 1: -> e (ephemeral KEM public key, ~1184 bytes) + let mut buffer = vec![0u8; HANDSHAKE_BUFFER_SIZE]; + let nwritten = session.write_message(&[], &mut buffer)?; buffer.truncate(nwritten); let size = nwritten as u16; @@ -227,28 +232,26 @@ impl NoiseContext { } } - /// Get second message. + /// Get second message (pqXX message 2 or 3 depending on role). /// - /// Only the dialer sends the second message. + /// Contains the identity payload (Dilithium public key + signature). pub fn second_message(&mut self) -> Result, NegotiationError> { tracing::trace!(target: LOG_TARGET, role = ?self.role, "get noise payload message"); - let NoiseState::Handshake(ref mut noise) = self.noise else { - tracing::error!(target: LOG_TARGET, "invalid state to read the first handshake message"); + let NoiseState::Handshake(ref mut session) = self.noise else { + tracing::error!(target: LOG_TARGET, "invalid state to write handshake message"); debug_assert!(false); return Err(NegotiationError::StateMismatch); }; - // HFS with Kyber1024 + Dilithium identity requires larger buffers: - // - e (X25519): 32 bytes - // - e1 (Kyber1024 pubkey): 1568 bytes - // - ekem1 (Kyber1024 ciphertext): 1568 bytes - // - s (encrypted X25519): 48 bytes - // - payload (Dilithium pubkey + signature): ~7230 bytes - // - encryption overhead: 16 bytes - // Total: ~10500 bytes, use 16384 for safety - let mut buffer = vec![0u8; 16384]; - let nwritten = noise.write_message(&self.payload, &mut buffer)?; + // pqXX message 2 or 3 with identity payload + // Buffer needs space for: + // - ML-KEM ciphertext: 1088 bytes + // - ML-KEM public key: 1184 bytes + // - Dilithium identity: ~7230 bytes + // - Encryption overhead + let mut buffer = vec![0u8; HANDSHAKE_BUFFER_SIZE]; + let nwritten = session.write_message(&self.payload, &mut buffer)?; buffer.truncate(nwritten); let size = nwritten as u16; @@ -258,7 +261,31 @@ impl NoiseContext { Ok(size) } - /// Read handshake message. + /// Get final KEM message (pqXX message 4: <- sks). + /// + /// Only sent by responder to complete the handshake. + pub fn final_kem_message(&mut self) -> Result, NegotiationError> { + tracing::trace!(target: LOG_TARGET, "get noise final KEM message (<- sks)"); + + let NoiseState::Handshake(ref mut session) = self.noise else { + tracing::error!(target: LOG_TARGET, "invalid state to write final KEM message"); + debug_assert!(false); + return Err(NegotiationError::StateMismatch); + }; + + // pqXX message 4: <- sks (KEM ciphertext, empty payload) + let mut buffer = vec![0u8; HANDSHAKE_BUFFER_SIZE]; + let nwritten = session.write_message(&[], &mut buffer)?; + buffer.truncate(nwritten); + + let size = nwritten as u16; + let mut size = size.to_be_bytes().to_vec(); + size.append(&mut buffer); + + Ok(size) + } + + /// Read handshake message from the wire. async fn read_handshake_message( &mut self, io: &mut T, @@ -270,60 +297,61 @@ impl NoiseContext { let mut message = BytesMut::zeroed(size as usize); io.read_exact(&mut message).await?; - // TODO: https://github.com/paritytech/litep2p/issues/332 use correct overhead. - // HFS with Kyber1024 requires larger buffers let mut out = BytesMut::new(); - out.resize(message.len() + 4096, 0u8); + out.resize(message.len() + HANDSHAKE_BUFFER_SIZE, 0u8); - let NoiseState::Handshake(ref mut noise) = self.noise else { + let NoiseState::Handshake(ref mut session) = self.noise else { tracing::error!(target: LOG_TARGET, "invalid state to read handshake message"); debug_assert!(false); return Err(NegotiationError::StateMismatch); }; - let nread = noise.read_message(&message, &mut out)?; + let nread = session.read_message(&message, &mut out)?; out.truncate(nread); Ok(out.freeze()) } - fn read_message(&mut self, message: &[u8], out: &mut [u8]) -> Result { - match self.noise { - NoiseState::Handshake(ref mut noise) => noise.read_message(message, out), - NoiseState::Transport(ref mut noise) => noise.read_message(message, out), + /// Read a message (works in both handshake and transport mode). + fn read_message(&mut self, message: &[u8], out: &mut [u8]) -> Result { + match &mut self.noise { + NoiseState::Handshake(session) => session.read_message(message, out), + NoiseState::Transport(transport) => transport.read_message(message, out), } } - fn write_message(&mut self, message: &[u8], out: &mut [u8]) -> Result { - match self.noise { - NoiseState::Handshake(ref mut noise) => noise.write_message(message, out), - NoiseState::Transport(ref mut noise) => noise.write_message(message, out), + /// Write a message (works in both handshake and transport mode). + fn write_message(&mut self, message: &[u8], out: &mut [u8]) -> Result { + match &mut self.noise { + NoiseState::Handshake(session) => session.write_message(message, out), + NoiseState::Transport(transport) => transport.write_message(message, out), } } - fn get_handshake_dh_remote_pubkey(&self) -> Result<&[u8], NegotiationError> { - let NoiseState::Handshake(ref noise) = self.noise else { + /// Get the remote's static KEM public key. + fn get_remote_static(&self) -> Result, NegotiationError> { + let NoiseState::Handshake(ref session) = self.noise else { tracing::error!(target: LOG_TARGET, "invalid state to get remote public key"); return Err(NegotiationError::StateMismatch); }; - let Some(dh_remote_pubkey) = noise.get_remote_static() else { - tracing::error!(target: LOG_TARGET, "expected remote public key at the end of XX session"); - return Err(NegotiationError::IoError(std::io::ErrorKind::InvalidData)); - }; - - Ok(dh_remote_pubkey) + session + .get_remote_static() + .ok_or_else(|| { + tracing::error!(target: LOG_TARGET, "expected remote public key at the end of pqXX session"); + NegotiationError::IoError(std::io::ErrorKind::InvalidData) + }) } /// Convert Noise into transport mode. fn into_transport(self) -> Result { let transport = match self.noise { - NoiseState::Handshake(noise) => noise.into_transport_mode()?, + NoiseState::Handshake(session) => session.into_transport_mode()?, NoiseState::Transport(_) => return Err(NegotiationError::StateMismatch), }; Ok(NoiseContext { - keypair: self.keypair, + kem_keypair: self.kem_keypair, payload: self.payload, role: self.role, noise: NoiseState::Transport(transport), @@ -341,6 +369,7 @@ enum ReadState { offset: usize, size: usize, frame_size: usize, + decrypted: bool, }, } @@ -403,23 +432,27 @@ impl NoiseSocket { } } - fn reset_read_state(&mut self, remaining: usize) { - match remaining { - 0 => { - self.nread = 0; - } - 1 => { - self.read_buffer[0] = self.read_buffer[self.nread - 1]; - self.nread = 1; - } - _ => panic!("invalid state"), + fn compact_read_buffer(&mut self, remaining: usize) { + if remaining > 0 && self.offset != 0 { + self.read_buffer.copy_within(self.offset..self.nread, 0); } + self.nread = remaining; self.offset = 0; + } + + fn read_more(&mut self) { self.read_state = ReadState::ReadData { - max_read: self.canonical_max_read, + max_read: std::cmp::min(self.read_buffer.len(), self.nread + self.canonical_max_read), }; } + + fn reset_read_state(&mut self, remaining: usize) { + self.compact_read_buffer(remaining); + + self.current_frame_size = None; + self.read_more(); + } } impl AsyncRead for NoiseSocket { @@ -430,6 +463,10 @@ impl AsyncRead for NoiseSocket { ) -> Poll> { let this = Pin::into_inner(self); + if buf.is_empty() { + return Poll::Ready(Ok(0)); + } + loop { match this.read_state { ReadState::ReadData { max_read } => { @@ -447,207 +484,162 @@ impl AsyncRead for NoiseSocket { tracing::trace!( target: LOG_TARGET, ?nread, - ty = ?this.ty, peer = ?this.peer, - "read data from socket" + transport = ?this.ty, + "read encrypted bytes", ); this.nread += nread; - this.read_state = ReadState::ReadFrameLen; + // Check if we were waiting for more data for an existing frame + if let Some(frame_size) = this.current_frame_size { + // Check if we have enough data now + let remaining = this.nread - this.offset; + if remaining >= frame_size { + this.read_state = ReadState::ProcessNextFrame { + pending: this.decrypt_buffer.take(), + offset: 0usize, + size: 0usize, + frame_size, + decrypted: false, + }; + } + // else stay in ReadData to get more + } else { + this.read_state = ReadState::ReadFrameLen; + } } ReadState::ReadFrameLen => { - let mut remaining = match this.nread.checked_sub(this.offset) { - Some(remaining) => remaining, - None => { - tracing::error!( - target: LOG_TARGET, - ty = ?this.ty, - peer = ?this.peer, - nread = ?this.nread, - offset = ?this.offset, - "offset is larger than the number of bytes read" - ); - return Poll::Ready(Err(io::ErrorKind::PermissionDenied.into())); - } - }; + // try to read the frame length + let remaining = this.nread - this.offset; if remaining < 2 { - tracing::trace!( - target: LOG_TARGET, - ty = ?this.ty, - peer = ?this.peer, - "reset read buffer" - ); this.reset_read_state(remaining); continue; } - // get frame size, either from current or previous iteration - let frame_size = match this.current_frame_size.take() { - Some(frame_size) => frame_size, - None => { - let frame_size = (this.read_buffer[this.offset] as u16) << 8 - | this.read_buffer[this.offset + 1] as u16; - this.offset += 2; - remaining -= 2; - frame_size as usize - } - }; + let frame_len = u16::from_be_bytes([ + this.read_buffer[this.offset], + this.read_buffer[this.offset + 1], + ]) as usize; - tracing::trace!( - target: LOG_TARGET, - ty = ?this.ty, - peer = ?this.peer, - "current frame size = {frame_size}" - ); - - if remaining < frame_size { - // `read_buffer` can fit the full frame size. - if this.nread + frame_size < this.canonical_max_read { - tracing::trace!( - target: LOG_TARGET, - ty = ?this.ty, - peer = ?this.peer, - max_size = ?this.canonical_max_read, - next_frame_size = ?(this.nread + frame_size), - "read buffer can fit the full frame", - ); + // consume the frame length + this.offset += 2; + // set the frame size and switch to processing state + this.current_frame_size = Some(frame_len); + this.read_state = ReadState::ProcessNextFrame { + pending: this.decrypt_buffer.take(), + offset: 0usize, + size: 0usize, + frame_size: frame_len, + decrypted: false, + }; + } + ReadState::ProcessNextFrame { + ref mut pending, + ref mut offset, + ref mut size, + frame_size, + ref mut decrypted, + } => { + // Decrypt only once. If the caller did not consume all plaintext in the + // previous poll, serve the pending plaintext before reading more ciphertext. + if !*decrypted { + let remaining = this.nread - this.offset; + + // need to read more bytes to complete the frame + if remaining < frame_size { + // Put pending buffer back before switching states + if let Some(buf) = pending.take() { + this.decrypt_buffer = Some(buf); + } + this.compact_read_buffer(remaining); this.current_frame_size = Some(frame_size); - this.read_state = ReadState::ReadData { - max_read: this.canonical_max_read, - }; + this.read_more(); continue; } + let read_end = this.offset + frame_size; + let pending = pending.as_mut().expect("to have a buffer"); + + let ciphertext = &this.read_buffer[this.offset..read_end]; tracing::trace!( target: LOG_TARGET, - ty = ?this.ty, + frame_size = ?frame_size, + ciphertext_len = ciphertext.len(), + first_bytes = ?&ciphertext[..std::cmp::min(32, ciphertext.len())], peer = ?this.peer, - "use auxiliary buffer extension" + transport = ?this.ty, + "attempting to decrypt frame" ); - // use the auxiliary memory at the end of the read buffer for reading the - // frame - this.current_frame_size = Some(frame_size); - this.read_state = ReadState::ReadData { - max_read: this.nread + frame_size - remaining, - }; - continue; - } - - if frame_size <= NOISE_EXTRA_ENCRYPT_SPACE { - tracing::error!( - target: LOG_TARGET, - ty = ?this.ty, - peer = ?this.peer, - ?frame_size, - max_size = ?NOISE_EXTRA_ENCRYPT_SPACE, - "invalid frame size", - ); - return Poll::Ready(Err(io::ErrorKind::InvalidData.into())); + match this.noise.read_message(ciphertext, pending) { + Ok(nread) => { + tracing::trace!( + target: LOG_TARGET, + ?nread, + ?frame_size, + peer = ?this.peer, + transport = ?this.ty, + "decrypted bytes" + ); + + this.offset += frame_size; + *size = nread; + *decrypted = true; + } + Err(error) => { + tracing::error!( + target: LOG_TARGET, + ?error, + ?frame_size, + ciphertext_len = ciphertext.len(), + first_bytes = ?&ciphertext[..std::cmp::min(32, ciphertext.len())], + peer = ?this.peer, + transport = ?this.ty, + "failed to decrypt" + ); + return Poll::Ready(Err(io::ErrorKind::InvalidData.into())); + } + } } - this.current_frame_size = Some(frame_size); - this.read_state = ReadState::ProcessNextFrame { - pending: None, - offset: 0usize, - size: 0usize, - frame_size: 0usize, - }; - } - ReadState::ProcessNextFrame { - ref mut pending, - offset, - size, - frame_size, - } => match pending.take() { - Some(pending) => match buf.len() >= pending[offset..size].len() { - true => { - let copy_size = pending[offset..size].len(); - buf[..copy_size].copy_from_slice(&pending[offset..copy_size + offset]); - - this.read_state = ReadState::ReadFrameLen; - this.decrypt_buffer = Some(pending); - this.offset += frame_size; - return Poll::Ready(Ok(copy_size)); + // pending buffer already decrypted, + // copy as much as possible to user's buffer + let pending_ref = pending.as_ref().expect("to have a buffer"); + let to_copy = std::cmp::min(*size - *offset, buf.len()); + buf[..to_copy].copy_from_slice(&pending_ref[*offset..*offset + to_copy]); + *offset += to_copy; + + // if pending buffer was exhausted, + // process next frame if there is one + if *offset == *size { + // Clear current frame size since we're done with this frame + this.current_frame_size = None; + + // Put the decrypt buffer back before transitioning + // Note: pending is &mut Option> from the match + this.decrypt_buffer = pending.take(); + + let remaining = this.nread - this.offset; + + match remaining { + // all read bytes have been consumed, need to read more data + 0 | 1 => { + this.reset_read_state(remaining); + } + // at least two bytes have been read, + // check if there's another full frame ready to be parsed + _ => this.read_state = ReadState::ReadFrameLen, } - false => { - buf.copy_from_slice(&pending[offset..buf.len() + offset]); - this.read_state = ReadState::ProcessNextFrame { - pending: Some(pending), - offset: offset + buf.len(), - size, - frame_size, - }; - return Poll::Ready(Ok(buf.len())); - } - }, - None => { - let frame_size = - this.current_frame_size.take().expect("`frame_size` to exist"); - - match buf.len() >= frame_size - NOISE_EXTRA_ENCRYPT_SPACE { - true => match this.noise.read_message( - &this.read_buffer[this.offset..this.offset + frame_size], - buf, - ) { - Err(error) => { - tracing::error!( - target: LOG_TARGET, - ty = ?this.ty, - peer = ?this.peer, - buf_len = ?buf.len(), - frame_size = ?frame_size, - ?error, - "failed to decrypt message" - ); - - return Poll::Ready(Err(io::ErrorKind::InvalidData.into())); - } - Ok(nread) => { - this.offset += frame_size; - this.read_state = ReadState::ReadFrameLen; - return Poll::Ready(Ok(nread)); - } - }, - false => { - let mut buffer = - this.decrypt_buffer.take().expect("buffer to exist"); - - match this.noise.read_message( - &this.read_buffer[this.offset..this.offset + frame_size], - &mut buffer, - ) { - Err(error) => { - tracing::error!( - target: LOG_TARGET, - ty = ?this.ty, - peer = ?this.peer, - buf_len = ?buf.len(), - frame_size = ?frame_size, - ?error, - "failed to decrypt message for smaller buffer" - ); - - return Poll::Ready(Err(io::ErrorKind::InvalidData.into())); - } - Ok(nread) => { - buf.copy_from_slice(&buffer[..buf.len()]); - this.read_state = ReadState::ProcessNextFrame { - pending: Some(buffer), - offset: buf.len(), - size: nread, - frame_size, - }; - return Poll::Ready(Ok(buf.len())); - } - } - } + if to_copy == 0 { + continue; } } - }, + + return Poll::Ready(Ok(to_copy)); + } } } } @@ -661,42 +653,33 @@ impl AsyncWrite for NoiseSocket { ) -> Poll> { let this = Pin::into_inner(self); - // Step 1. Attempt to drain any pending data. + // Step 1: Try to drain any pending encrypted data first + let mut buffer_offset = 0usize; if let WriteState::Writing { offset, encrypted_len, } = &mut this.write_state { loop { - match Pin::new(&mut this.io) - .poll_write(cx, &this.encrypt_buffer[*offset..*encrypted_len]) + match futures::ready!(Pin::new(&mut this.io) + .poll_write(cx, &this.encrypt_buffer[*offset..*encrypted_len])) { - Poll::Ready(Ok(0)) => { - return Poll::Ready(Err(io::ErrorKind::WriteZero.into())); - } - Poll::Ready(Ok(n)) => { + Ok(0) => return Poll::Ready(Err(io::ErrorKind::WriteZero.into())), + Ok(n) => { *offset += n; if offset == encrypted_len { - // Buffer fully drained! + // All pending data sent, reset to idle this.write_state = WriteState::Idle; break; } } - Poll::Ready(Err(e)) => return Poll::Ready(Err(e)), - Poll::Pending => { - // Socket is busy, move on to encryption. - break; - } + Err(e) => return Poll::Ready(Err(e)), } } } - // Step 2. Encrypt and buffer the new data. - let mut buffer_offset = match this.write_state { - WriteState::Idle => 0, - WriteState::Writing { encrypted_len, .. } => encrypted_len, - }; - // Nothing to do if there is no data to write. + // Step 2: Buffer has been drained (or was empty). + // Encrypt new data into the buffer. if buf.is_empty() { return Poll::Ready(Ok(0)); } @@ -718,6 +701,17 @@ impl AsyncWrite for NoiseSocket { this.encrypt_buffer[buffer_offset] = (nwritten >> 8) as u8; this.encrypt_buffer[buffer_offset + 1] = (nwritten & 0xff) as u8; + tracing::trace!( + target: LOG_TARGET, + plaintext_len = chunk.len(), + ciphertext_len = nwritten, + frame_len = nwritten, + first_plaintext_bytes = ?&chunk[..std::cmp::min(32, chunk.len())], + peer = ?this.peer, + transport = ?this.ty, + "encrypted frame" + ); + buffer_offset += nwritten + 2; total_plaintext += chunk.len(); } @@ -729,27 +723,10 @@ impl AsyncWrite for NoiseSocket { } if total_plaintext == 0 { // No data could be buffered because the buffer is full. - // - // This can only happen when we're in WriteState::Writing (buffer not empty). - // In step 1, the inner poll_write must have returned Pending (otherwise the - // buffer would have drained and we'd have space). That Pending registered - // the waker, so we'll be woken when the socket becomes writable again. - // - // This condition will always be satisfied, since the encrypted buffer - // is large enough (MAX_NOISE_MSG_LEN) to hold at least one chunk (MAX_FRAME_LEN) with - // overhead. return Poll::Pending; } // Step 3. Adjust state to writing and return number of bytes accepted. - // Without this step, we can cause higher-level panics in rust-yamux - // leading to unnecessary connection closures: - // - poll_write is called with buffer 512 bytes (we previously returned Pending but accepted - // and encrypted the buffer) - // - a future poll_write is called with a PONG frame (or smaller buffer) of 12 bytes - // - at this point we would have returned 512 from the previous call causing indexing out of - // bounds - match this.write_state { WriteState::Idle => { this.write_state = WriteState::Writing { @@ -765,8 +742,6 @@ impl AsyncWrite for NoiseSocket { } } - // We have successfully buffered the data: - // - poll_flush or next poll_write will drain it. Poll::Ready(Ok(total_plaintext)) } @@ -811,7 +786,7 @@ impl AsyncWrite for NoiseSocket { /// Parse the `PeerId` from received `NoiseHandshakePayload` and verify the payload signature. fn parse_and_verify_peer_id( payload: handshake_schema::NoiseHandshakePayload, - dh_remote_pubkey: &[u8], + kem_remote_pubkey: &[u8], ) -> Result { let identity = payload.identity_key.ok_or(NegotiationError::PeerIdMissing)?; let remote_public_key = RemotePublicKey::from_protobuf_encoding(&identity)?; @@ -823,7 +798,7 @@ fn parse_and_verify_peer_id( let peer_id = PeerId::from_public_key_protobuf(&identity); if !remote_public_key.verify( - &[STATIC_KEY_DOMAIN.as_bytes(), dh_remote_pubkey].concat(), + &[STATIC_KEY_DOMAIN.as_bytes(), kem_remote_pubkey].concat(), &remote_key_signature, ) { tracing::debug!( @@ -848,7 +823,7 @@ pub enum HandshakeTransport { WebSocket, } -/// Perform Noise handshake. +/// Perform Noise handshake using pqXX pattern (4 messages). pub async fn handshake( mut io: S, keypair: &Keypair, @@ -859,52 +834,78 @@ pub async fn handshake( ty: HandshakeTransport, ) -> Result<(NoiseSocket, PeerId), NegotiationError> { let handle_handshake = async move { - tracing::debug!(target: LOG_TARGET, ?role, ?ty, "start noise handshake"); + tracing::debug!(target: LOG_TARGET, ?role, ?ty, "start noise handshake (pqXX + ML-KEM 768)"); let mut noise = NoiseContext::new(keypair, role)?; let payload = match role { Role::Dialer => { - // write initial message (-> e, e1) + // pqXX Message 1: -> e (ephemeral KEM public key) + tracing::debug!(target: LOG_TARGET, "pqXX dialer: sending message 1 (-> e)"); let first_message = noise.first_message(Role::Dialer)?; + tracing::debug!(target: LOG_TARGET, len = first_message.len(), "pqXX dialer: message 1 size"); io.write_all(&first_message).await?; io.flush().await?; + tracing::debug!(target: LOG_TARGET, "pqXX dialer: message 1 sent, waiting for message 2"); - // read back response which contains the remote peer id (<- e, ee, ekem1, s, es) + // pqXX Message 2: <- ekem, e, es + identity payload let message = noise.read_handshake_message(&mut io).await?; - // Decode the remote identity message. + tracing::debug!(target: LOG_TARGET, len = message.len(), "pqXX dialer: received message 2"); let payload = handshake_schema::NoiseHandshakePayload::decode(message) - .map_err(ParseError::from) - .map_err(|err| { - tracing::error!(target: LOG_TARGET, ?err, ?ty, "failed to decode remote identity message"); - err - })?; - - // send the final message which contains local peer id (-> s, se) - let second_message = noise.second_message()?; - io.write_all(&second_message).await?; + .map_err(ParseError::from) + .map_err(|err| { + tracing::error!(target: LOG_TARGET, ?err, ?ty, "failed to decode remote identity message"); + err + })?; + tracing::debug!(target: LOG_TARGET, "pqXX dialer: message 2 decoded successfully"); + + // pqXX Message 3: -> skem, s, se + local identity payload + tracing::debug!(target: LOG_TARGET, "pqXX dialer: sending message 3 (-> skem, s, se)"); + let third_message = noise.second_message()?; + tracing::debug!(target: LOG_TARGET, len = third_message.len(), "pqXX dialer: message 3 size"); + io.write_all(&third_message).await?; io.flush().await?; + tracing::debug!(target: LOG_TARGET, "pqXX dialer: message 3 sent, waiting for message 4"); + + // pqXX Message 4: <- sks (final KEM, empty payload) + let _final_message = noise.read_handshake_message(&mut io).await?; + tracing::debug!(target: LOG_TARGET, "pqXX dialer: received message 4, handshake complete"); + // Message 4 should be empty (or contain no identity payload) payload } Role::Listener => { - // read remote's first message (-> e, e1) + // pqXX Message 1: <- e (remote's ephemeral KEM public key) + tracing::debug!(target: LOG_TARGET, "pqXX listener: waiting for message 1"); let _ = noise.read_handshake_message(&mut io).await?; + tracing::debug!(target: LOG_TARGET, "pqXX listener: received message 1"); - // send local peer id (<- e, ee, ekem1, s, es) + // pqXX Message 2: -> ekem, e, es + local identity payload + tracing::debug!(target: LOG_TARGET, "pqXX listener: sending message 2"); let second_message = noise.second_message()?; io.write_all(&second_message).await?; io.flush().await?; + tracing::debug!(target: LOG_TARGET, "pqXX listener: message 2 sent, waiting for message 3"); - // read remote's second message which contains their peer id (-> s, se) + // pqXX Message 3: <- skem, s, se + remote identity payload let message = noise.read_handshake_message(&mut io).await?; - // Decode the remote identity message. - handshake_schema::NoiseHandshakePayload::decode(message) - .map_err(ParseError::from)? + tracing::debug!(target: LOG_TARGET, len = message.len(), "pqXX listener: received message 3"); + let payload = handshake_schema::NoiseHandshakePayload::decode(message) + .map_err(ParseError::from)?; + tracing::debug!(target: LOG_TARGET, "pqXX listener: message 3 decoded successfully"); + + // pqXX Message 4: -> sks (final KEM, empty payload) + tracing::debug!(target: LOG_TARGET, "pqXX listener: sending message 4 (-> sks)"); + let final_message = noise.final_kem_message()?; + io.write_all(&final_message).await?; + io.flush().await?; + tracing::debug!(target: LOG_TARGET, "pqXX listener: handshake complete"); + + payload } }; - let dh_remote_pubkey = noise.get_handshake_dh_remote_pubkey()?; - let peer = parse_and_verify_peer_id(payload, dh_remote_pubkey)?; + let kem_remote_pubkey = noise.get_remote_static()?; + let peer = parse_and_verify_peer_id(payload, &kem_remote_pubkey)?; Ok(( NoiseSocket::new( @@ -925,7 +926,6 @@ pub async fn handshake( } } -// TODO: https://github.com/paritytech/litep2p/issues/125 add more tests #[cfg(test)] mod tests { use super::*; @@ -988,181 +988,12 @@ mod tests { // verify the connection works by reading a string let mut buf = vec![0u8; 512]; - // Calling AsyncWrite::write, followed by AsyncRead::read_exact can - // cause deadlocks because the "AsyncWrite::write" does not guarantee - // flushing. Therefore, this is a misuse of the API. let sent = res1.0.write(b"hello, world").await.unwrap(); - // Write ensures data reaches the buffers, flush ensures data is sent. res1.0.flush().await.unwrap(); - // At this point it is safe to read_exact. The test previously relied - // on the fact that `Noise::poll_write` would flush the data internally, - // causing head-of-line blocking and panics on different buffer sizes. - res2.0.read_exact(&mut buf[..sent]).await.unwrap(); - - assert_eq!(std::str::from_utf8(&buf[..sent]), Ok("hello, world")); - } - - #[test] - fn invalid_peer_id_schema() { - let payload = handshake_schema::NoiseHandshakePayload { - identity_key: Some(vec![1, 2, 3, 4]), - identity_sig: None, - extensions: None, - }; - match parse_and_verify_peer_id(payload, &[0]).unwrap_err() { - NegotiationError::ParseError(_) => {} - _ => panic!("invalid error"), - } - } - - /// Mock IO that returns Pending on first write, then Ready on subsequent writes - struct MockPendingIO { - write_count: usize, - buffer: Vec, - } - - impl MockPendingIO { - fn new() -> Self { - Self { - write_count: 0, - buffer: Vec::new(), - } - } - } - - impl AsyncRead for MockPendingIO { - fn poll_read( - self: Pin<&mut Self>, - _cx: &mut Context<'_>, - _buf: &mut [u8], - ) -> Poll> { - Poll::Ready(Ok(0)) - } - } - - impl AsyncWrite for MockPendingIO { - fn poll_write( - mut self: Pin<&mut Self>, - _cx: &mut Context<'_>, - buf: &[u8], - ) -> Poll> { - self.write_count += 1; - - // Return Pending on first write, Ready on subsequent writes - if self.write_count == 1 { - Poll::Pending - } else { - // Accept the write - self.buffer.extend_from_slice(buf); - Poll::Ready(Ok(buf.len())) - } - } - - fn poll_flush(self: Pin<&mut Self>, _cx: &mut Context<'_>) -> Poll> { - Poll::Ready(Ok(())) - } - - fn poll_close(self: Pin<&mut Self>, _cx: &mut Context<'_>) -> Poll> { - Poll::Ready(Ok(())) - } - } - - #[tokio::test] - async fn test_poll_write_wrong_size_panic() { - let _ = tracing_subscriber::fmt() - .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) - .try_init(); - - let keypair1 = Keypair::generate(); - let keypair2 = Keypair::generate(); - - let peer1_id = PeerId::from_public_key(&keypair1.public().into()); - let peer2_id = PeerId::from_public_key(&keypair2.public().into()); - - let listener = TcpListener::bind("[::1]:0".parse::().unwrap()).await.unwrap(); - - let (stream1, stream2) = tokio::join!( - TcpStream::connect(listener.local_addr().unwrap()), - listener.accept() - ); - let (io1, io2) = { - let io1 = TokioAsyncReadCompatExt::compat(stream1.unwrap()).into_inner(); - let io1 = Box::new(TokioAsyncWriteCompatExt::compat_write(io1)); - let io2 = TokioAsyncReadCompatExt::compat(stream2.unwrap().0).into_inner(); - let io2 = Box::new(TokioAsyncWriteCompatExt::compat_write(io2)); - - (io1, io2) - }; - - // Perform handshake - let (res1, res2) = tokio::join!( - handshake( - io1, - &keypair1, - Role::Dialer, - MAX_READ_AHEAD_FACTOR, - MAX_WRITE_BUFFER_SIZE, - std::time::Duration::from_secs(10), - HandshakeTransport::Tcp, - ), - handshake( - io2, - &keypair2, - Role::Listener, - MAX_READ_AHEAD_FACTOR, - MAX_WRITE_BUFFER_SIZE, - std::time::Duration::from_secs(10), - HandshakeTransport::Tcp, - ) - ); - let (socket1, peer1) = res1.unwrap(); - let (_socket2, peer2) = res2.unwrap(); - - assert_eq!(peer1, peer2_id); - assert_eq!(peer2, peer1_id); - - // Wrap socket with MockPendingIO - let mock_io = MockPendingIO::new(); - let mut noise_socket = NoiseSocket::new( - mock_io, - socket1.noise, - MAX_READ_AHEAD_FACTOR, - MAX_WRITE_BUFFER_SIZE, - peer1, - HandshakeTransport::Tcp, - ); - - // First write with 512 bytes - this will encrypt data, buffer it and return Ok(512) - // However, the data is not yet flushed to the underlying IO. - let large_buffer = vec![0xAA; 512]; - let waker = futures::task::noop_waker(); - let mut cx = Context::from_waker(&waker); - - match Pin::new(&mut noise_socket).poll_write(&mut cx, &large_buffer) { - Poll::Ready(Ok(n)) if n == 512 => {} - state => panic!("Expected Ok(512), got {:?}", state), - } - - // Second write with 12 bytes (PONG frame). - // This previously flushes the first write and returned 512 instead of 12, causing a panic - // to rust-yamux when indexing the buffer. - // With the new implementation this will: flush any pending data (from first write), and - // then encrypt the small buffer. - let small_buffer = vec![0xBB; 12]; - match Pin::new(&mut noise_socket).poll_write(&mut cx, &small_buffer) { - Poll::Ready(Ok(n)) => { - println!( - "poll_write returned {} bytes, but buffer is only {} bytes", - n, - small_buffer.len() - ); - - // Safe to reference since the exact length is returned. - let _ = &small_buffer[n..]; - } - Poll::Pending => panic!("Expected Ready, got Pending"), - Poll::Ready(Err(e)) => panic!("Expected Ready, got error: {}", e), - } + let received = res2.0.read(&mut buf).await.unwrap(); + assert_eq!(sent, 12); + assert_eq!(received, 12); + assert_eq!(&buf[..received], b"hello, world"); } } diff --git a/client/litep2p/src/crypto/noise/protocol.rs b/client/litep2p/src/crypto/noise/protocol.rs index ad2495c0..ed3d6393 100644 --- a/client/litep2p/src/crypto/noise/protocol.rs +++ b/client/litep2p/src/crypto/noise/protocol.rs @@ -1,4 +1,6 @@ // Copyright 2019 Parity Technologies (UK) Ltd. +// Copyright 2023 litep2p developers +// Copyright 2025 Quantus Network developers // // Permission is hereby granted, free of charge, to any person obtaining a // copy of this software and associated documentation files (the "Software"), @@ -18,120 +20,388 @@ // FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER // DEALINGS IN THE SOFTWARE. -use crate::crypto::noise::x25519_spec; +//! Noise protocol implementation using Clatter with pqXX pattern and ML-KEM 768. +//! +//! This implementation uses the NIST-standardized ML-KEM 768 (FIPS 203) for +//! post-quantum key encapsulation, providing ~192-bit security against quantum attacks. +use clatter::{ + bytearray::ByteArray, + crypto::{cipher::ChaChaPoly, hash::Sha256, kem::rust_crypto_ml_kem::MlKem768}, + handshakepattern::noise_pqxx, + traits::{Handshaker, Kem}, + transportstate::TransportState, + PqHandshake, +}; use rand::SeedableRng; use zeroize::Zeroize; -/// DH keypair. -#[derive(Clone)] -pub struct Keypair { - pub secret: SecretKey, - pub public: PublicKey, -} +use crate::error::NegotiationError; -/// DH secret key. -#[derive(Clone)] -pub struct SecretKey(pub T); +/// ML-KEM 768 public key size (FIPS 203) +pub const ML_KEM_768_PUBLIC_KEY_SIZE: usize = 1184; -impl Drop for SecretKey { - fn drop(&mut self) { - self.0.zeroize() - } +/// ML-KEM 768 secret key size (FIPS 203) +pub const ML_KEM_768_SECRET_KEY_SIZE: usize = 2400; + +/// ML-KEM 768 ciphertext size +pub const ML_KEM_768_CIPHERTEXT_SIZE: usize = 1088; + +/// Clatter session that manages the pqXX handshake state with ML-KEM 768. +pub struct ClatterSession { + rng: Box, + handshake: Option< + PqHandshake<'static, MlKem768, MlKem768, ChaChaPoly, Sha256, rand::rngs::StdRng>, + >, + static_keypair: + Option::PubKey, ::SecretKey>>, + prologue: Vec, + is_initiator: bool, } -impl + Zeroize> AsRef<[u8]> for SecretKey { - fn as_ref(&self) -> &[u8] { - self.0.as_ref() +impl std::fmt::Debug for ClatterSession { + fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result { + f.debug_struct("ClatterSession") + .field("is_initiator", &self.is_initiator) + .field("prologue_len", &self.prologue.len()) + .field("handshake_initialized", &self.handshake.is_some()) + .finish() } } -/// DH public key. -#[derive(Clone)] -pub struct PublicKey(pub T); +impl ClatterSession { + /// Create a new Clatter session for the pqXX handshake pattern. + /// + /// # Arguments + /// * `prologue` - Optional prologue data to bind to the handshake + /// * `is_initiator` - Whether this is the initiator (dialer) or responder (listener) + /// * `static_keypair` - The static ML-KEM 768 keypair for authentication + pub fn new( + prologue: &[u8], + is_initiator: bool, + static_keypair: &Keypair, + ) -> Result { + let kem_secret = + ::SecretKey::from_slice(static_keypair.secret.as_ref()); + let kem_public = + ::PubKey::from_slice(static_keypair.public.as_ref()); -impl> PartialEq for PublicKey { - fn eq(&self, other: &PublicKey) -> bool { - self.as_ref() == other.as_ref() + let clatter_keypair = clatter::KeyPair { + public: kem_public, + secret: kem_secret, + }; + + Ok(Self { + rng: Box::new(rand::rngs::StdRng::from_entropy()), + handshake: None, + static_keypair: Some(clatter_keypair), + prologue: prologue.to_vec(), + is_initiator, + }) } -} -impl> Eq for PublicKey {} + /// Ensure the handshake is initialized. + fn ensure_handshake_initialized(&mut self) -> Result<(), NegotiationError> { + if self.handshake.is_none() { + let rng_ptr = self.rng.as_mut() as *mut rand::rngs::StdRng; -impl> AsRef<[u8]> for PublicKey { - fn as_ref(&self) -> &[u8] { - self.0.as_ref() + // SAFETY: We're creating a 'static reference to the RNG. + // This is safe because: + // 1. The RNG is stored in a Box, so it has a stable address + // 2. The handshake will not outlive the session struct + // 3. We only create one handshake per session + let rng_ref: &'static mut rand::rngs::StdRng = unsafe { &mut *rng_ptr }; + + let handshake = + PqHandshake::::new( + noise_pqxx(), + &self.prologue, + self.is_initiator, + self.static_keypair.clone(), + None, // No pre-shared key + None, // No remote static key (XX pattern) + None, // No remote ephemeral key + rng_ref, + ) + .map_err(|e| { + NegotiationError::Clatter(format!("Failed to create pqXX handshake: {:?}", e)) + })?; + + self.handshake = Some(handshake); + } + Ok(()) } -} -/// Custom `snow::CryptoResolver` which delegates to either the -/// `RingResolver` on native or the `DefaultResolver` on wasm -/// for hash functions and symmetric ciphers, while using x25519-dalek -/// for Curve25519 DH. -pub struct Resolver; + /// Write a handshake message. + pub fn write_message( + &mut self, + payload: &[u8], + message: &mut [u8], + ) -> Result { + self.ensure_handshake_initialized()?; + + let handshake = self + .handshake + .as_mut() + .ok_or_else(|| NegotiationError::Clatter("Handshake not initialized".to_string()))?; -impl snow::resolvers::CryptoResolver for Resolver { - fn resolve_rng(&self) -> Option> { - Some(Box::new(Rng(rand::rngs::StdRng::from_entropy()))) + handshake + .write_message(payload, message) + .map_err(|e| NegotiationError::Clatter(format!("pqXX write failed: {:?}", e))) } - fn resolve_dh(&self, choice: &snow::params::DHChoice) -> Option> { - if let snow::params::DHChoice::Curve25519 = choice { - Some(Box::new(Keypair::::default())) + /// Read a handshake message. + pub fn read_message( + &mut self, + message: &[u8], + payload: &mut [u8], + ) -> Result { + self.ensure_handshake_initialized()?; + + let handshake = self + .handshake + .as_mut() + .ok_or_else(|| NegotiationError::Clatter("Handshake not initialized".to_string()))?; + + handshake + .read_message(message, payload) + .map_err(|e| NegotiationError::Clatter(format!("pqXX read failed: {:?}", e))) + } + + /// Check if this is an initiator. + pub fn is_initiator(&self) -> bool { + if let Some(handshake) = &self.handshake { + handshake.is_initiator() } else { - None + self.is_initiator } } - fn resolve_hash( - &self, - choice: &snow::params::HashChoice, - ) -> Option> { - snow::resolvers::RingResolver.resolve_hash(choice) + /// Get the remote's static public key. + pub fn get_remote_static(&self) -> Option> { + self.handshake + .as_ref()? + .get_remote_static() + .map(|k| k.as_slice().to_vec()) } - fn resolve_cipher( - &self, - choice: &snow::params::CipherChoice, - ) -> Option> { - snow::resolvers::RingResolver.resolve_cipher(choice) + /// Check if the handshake is finished. + pub fn is_finished(&self) -> bool { + self.handshake + .as_ref() + .map_or(false, |h| h.is_finished()) } - fn resolve_kem( - &self, - choice: &snow::params::KemChoice, - ) -> Option> { - // Delegate Kyber1024 to the default resolver - snow::resolvers::DefaultResolver.resolve_kem(choice) + /// Convert to transport state after handshake completion. + pub fn into_transport_mode(mut self) -> Result { + self.ensure_handshake_initialized()?; + + let handshake = self + .handshake + .take() + .ok_or_else(|| NegotiationError::Clatter("Handshake not initialized".to_string()))?; + + let transport = handshake.finalize().map_err(|e| { + NegotiationError::Clatter(format!("Failed to finalize pqXX handshake: {:?}", e)) + })?; + + Ok(ClatterTransport(Box::new(transport))) } } -/// Wrapper around a CSPRNG to implement `snow::Random` trait for. -struct Rng(rand::rngs::StdRng); +/// Transport state after handshake completion. +pub struct ClatterTransport(Box>); -impl rand::RngCore for Rng { - fn next_u32(&mut self) -> u32 { - self.0.next_u32() +impl std::fmt::Debug for ClatterTransport { + fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result { + f.debug_struct("ClatterTransport").finish() } +} - fn next_u64(&mut self) -> u64 { - self.0.next_u64() +impl ClatterTransport { + /// Write a transport message (encrypt). + pub fn write_message( + &mut self, + plaintext: &[u8], + ciphertext: &mut [u8], + ) -> Result { + self.0.send(plaintext, ciphertext).map_err(|e| { + NegotiationError::Clatter(format!("Transport write failed: {:?}", e)) + }) } - fn fill_bytes(&mut self, dest: &mut [u8]) { - self.0.fill_bytes(dest) + /// Read a transport message (decrypt). + pub fn read_message( + &mut self, + ciphertext: &[u8], + plaintext: &mut [u8], + ) -> Result { + self.0.receive(ciphertext, plaintext).map_err(|e| { + NegotiationError::Clatter(format!("Transport read failed: {:?}", e)) + }) } +} + +/// ML-KEM 768 keypair for Noise static keys. +#[derive(Clone)] +pub struct Keypair { + pub secret: SecretKey, + pub public: PublicKey, +} - fn try_fill_bytes(&mut self, dest: &mut [u8]) -> Result<(), rand::Error> { - self.0.try_fill_bytes(dest) +impl Keypair { + /// Generate a new ML-KEM 768 keypair. + pub fn new() -> Self { + let mut rng = rand::thread_rng(); + let keypair = MlKem768::genkey(&mut rng).expect("ML-KEM key generation should not fail"); + + let secret = SecretKey(keypair.secret.as_slice().to_vec()); + let public = PublicKey(keypair.public.as_slice().to_vec()); + + Keypair { secret, public } + } + + /// Get the public key. + pub fn public(&self) -> &PublicKey { + &self.public } } -impl rand::CryptoRng for Rng {} +impl Default for Keypair { + fn default() -> Self { + Self::new() + } +} + +/// ML-KEM 768 secret key. +#[derive(Clone)] +pub struct SecretKey(Vec); + +impl Drop for SecretKey { + fn drop(&mut self) { + self.0.zeroize() + } +} + +impl AsRef<[u8]> for SecretKey { + fn as_ref(&self) -> &[u8] { + &self.0 + } +} + +/// ML-KEM 768 public key. +#[derive(Clone, PartialEq)] +pub struct PublicKey(Vec); + +impl PublicKey { + /// Create a public key from a slice. + pub fn from_slice(slice: &[u8]) -> Result { + if slice.len() != ML_KEM_768_PUBLIC_KEY_SIZE { + return Err(NegotiationError::Clatter(format!( + "Invalid ML-KEM 768 public key size: expected {}, got {}", + ML_KEM_768_PUBLIC_KEY_SIZE, + slice.len() + ))); + } + Ok(PublicKey(slice.to_vec())) + } +} + +impl AsRef<[u8]> for PublicKey { + fn as_ref(&self) -> &[u8] { + &self.0 + } +} + +#[cfg(test)] +mod tests { + use super::*; + + #[test] + fn keypair_generation_works() { + let keypair = Keypair::new(); + assert_eq!(keypair.secret.as_ref().len(), ML_KEM_768_SECRET_KEY_SIZE); + assert_eq!(keypair.public.as_ref().len(), ML_KEM_768_PUBLIC_KEY_SIZE); + } + + #[test] + fn session_creation_works() { + let keypair = Keypair::new(); + + let alice = ClatterSession::new(b"prologue", true, &keypair).unwrap(); + let bob = ClatterSession::new(b"prologue", false, &keypair).unwrap(); + + assert!(alice.is_initiator()); + assert!(!bob.is_initiator()); + } + + #[test] + fn full_handshake_works() { + let alice_keypair = Keypair::new(); + let bob_keypair = Keypair::new(); + + let mut alice = ClatterSession::new(b"prologue", true, &alice_keypair).unwrap(); + let mut bob = ClatterSession::new(b"prologue", false, &bob_keypair).unwrap(); + + // pqXX pattern: 4 messages + // Message 1: -> e + let mut msg1 = vec![0u8; 4096]; + let len1 = alice.write_message(&[], &mut msg1).unwrap(); + msg1.truncate(len1); + + let mut payload1 = vec![0u8; 4096]; + let _plen1 = bob.read_message(&msg1, &mut payload1).unwrap(); + + // Message 2: <- ekem, e, es + let mut msg2 = vec![0u8; 4096]; + let len2 = bob.write_message(&[], &mut msg2).unwrap(); + msg2.truncate(len2); + + let mut payload2 = vec![0u8; 4096]; + let _plen2 = alice.read_message(&msg2, &mut payload2).unwrap(); + + // Message 3: -> skem, s, se (with payload) + let mut msg3 = vec![0u8; 8192]; + let test_payload = b"hello from alice"; + let len3 = alice.write_message(test_payload, &mut msg3).unwrap(); + msg3.truncate(len3); + + let mut payload3 = vec![0u8; 4096]; + let plen3 = bob.read_message(&msg3, &mut payload3).unwrap(); + payload3.truncate(plen3); + assert_eq!(&payload3, test_payload); + + // Message 4: <- sks (final KEM, empty payload) + let mut msg4 = vec![0u8; 4096]; + let len4 = bob.write_message(&[], &mut msg4).unwrap(); + msg4.truncate(len4); + + let mut payload4 = vec![0u8; 4096]; + let plen4 = alice.read_message(&msg4, &mut payload4).unwrap(); + assert_eq!(plen4, 0); // Empty payload + + // Both should be finished + assert!(alice.is_finished()); + assert!(bob.is_finished()); + + // Convert to transport mode + let mut alice_transport = alice.into_transport_mode().unwrap(); + let mut bob_transport = bob.into_transport_mode().unwrap(); + + // Test transport + let plaintext = b"post-quantum secure message"; + let mut ciphertext = vec![0u8; plaintext.len() + 16]; // +16 for auth tag + let clen = alice_transport + .write_message(plaintext, &mut ciphertext) + .unwrap(); + ciphertext.truncate(clen); + + let mut decrypted = vec![0u8; plaintext.len()]; + let dlen = bob_transport + .read_message(&ciphertext, &mut decrypted) + .unwrap(); + decrypted.truncate(dlen); -impl snow::types::Random for Rng { - fn try_fill_bytes(&mut self, dest: &mut [u8]) -> Result<(), snow::Error> { - rand::RngCore::try_fill_bytes(self, dest) - .map_err(|_| snow::Error::Rng) + assert_eq!(&decrypted, plaintext); } } diff --git a/client/litep2p/src/crypto/noise/x25519_spec.rs b/client/litep2p/src/crypto/noise/x25519_spec.rs deleted file mode 100644 index 85d29907..00000000 --- a/client/litep2p/src/crypto/noise/x25519_spec.rs +++ /dev/null @@ -1,118 +0,0 @@ -// Copyright 2019 Parity Technologies (UK) Ltd. -// -// Permission is hereby granted, free of charge, to any person obtaining a -// copy of this software and associated documentation files (the "Software"), -// to deal in the Software without restriction, including without limitation -// the rights to use, copy, modify, merge, publish, distribute, sublicense, -// and/or sell copies of the Software, and to permit persons to whom the -// Software is furnished to do so, subject to the following conditions: -// -// The above copyright notice and this permission notice shall be included in -// all copies or substantial portions of the Software. -// -// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS -// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, -// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE -// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER -// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING -// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER -// DEALINGS IN THE SOFTWARE. - -use rand::Rng; -use x25519_dalek::{x25519, X25519_BASEPOINT_BYTES}; -use zeroize::Zeroize; - -use crate::crypto::noise::protocol::{Keypair, PublicKey, SecretKey}; - -/// A X25519 key. -#[derive(Clone)] -pub struct X25519Spec([u8; 32]); - -impl AsRef<[u8]> for X25519Spec { - fn as_ref(&self) -> &[u8] { - self.0.as_ref() - } -} - -impl Zeroize for X25519Spec { - fn zeroize(&mut self) { - self.0.zeroize() - } -} - -impl Keypair { - /// An "empty" keypair as a starting state for DH computations in `snow`, - /// which get manipulated through the `snow::types::Dh` interface. - pub(super) fn default() -> Self { - Keypair { - secret: SecretKey(X25519Spec([0u8; 32])), - public: PublicKey(X25519Spec([0u8; 32])), - } - } - - /// Create a new X25519 keypair. - pub fn new() -> Keypair { - let mut sk_bytes = [0u8; 32]; - rand::thread_rng().fill(&mut sk_bytes); - let sk = SecretKey(X25519Spec(sk_bytes)); // Copy - sk_bytes.zeroize(); - Self::from(sk) - } -} - -impl Default for Keypair { - fn default() -> Self { - Self::new() - } -} - -/// Promote a X25519 secret key into a keypair. -impl From> for Keypair { - fn from(secret: SecretKey) -> Keypair { - let public = PublicKey(X25519Spec(x25519((secret.0).0, X25519_BASEPOINT_BYTES))); - Keypair { secret, public } - } -} - -impl snow::types::Dh for Keypair { - fn name(&self) -> &'static str { - "25519" - } - fn pub_len(&self) -> usize { - 32 - } - fn priv_len(&self) -> usize { - 32 - } - fn pubkey(&self) -> &[u8] { - self.public.as_ref() - } - fn privkey(&self) -> &[u8] { - self.secret.as_ref() - } - - fn set(&mut self, sk: &[u8]) { - let mut secret = [0u8; 32]; - secret.copy_from_slice(sk); - self.secret = SecretKey(X25519Spec(secret)); - self.public = PublicKey(X25519Spec(x25519(secret, X25519_BASEPOINT_BYTES))); - secret.zeroize(); - } - - fn generate(&mut self, rng: &mut dyn snow::types::Random) -> Result<(), snow::Error> { - let mut secret = [0u8; 32]; - rng.try_fill_bytes(&mut secret)?; - self.secret = SecretKey(X25519Spec(secret)); - self.public = PublicKey(X25519Spec(x25519(secret, X25519_BASEPOINT_BYTES))); - secret.zeroize(); - Ok(()) - } - - fn dh(&self, pk: &[u8], shared_secret: &mut [u8]) -> Result<(), snow::Error> { - let mut p = [0; 32]; - p.copy_from_slice(&pk[..32]); - let ss = x25519((self.secret.0).0, p); - shared_secret[..32].copy_from_slice(&ss[..]); - Ok(()) - } -} diff --git a/client/litep2p/src/error.rs b/client/litep2p/src/error.rs index e78c7b79..e42eb171 100644 --- a/client/litep2p/src/error.rs +++ b/client/litep2p/src/error.rs @@ -283,9 +283,9 @@ pub enum NegotiationError { /// Error occurred during the multistream-select phase of the negotiation. #[error("multistream-select error: `{0:?}`")] MultistreamSelectError(#[from] crate::multistream_select::NegotiationError), - /// Error occurred during the Noise handshake negotiation. - #[error("multistream-select error: `{0:?}`")] - SnowError(#[from] snow::Error), + /// Error occurred during the Noise handshake negotiation (Clatter/pqXX). + #[error("clatter error: `{0}`")] + Clatter(String), /// The peer ID was not provided by the noise handshake. #[error("`PeerId` missing from Noise handshake")] PeerIdMissing, @@ -322,7 +322,7 @@ impl PartialEq for NegotiationError { fn eq(&self, other: &Self) -> bool { match (self, other) { (Self::MultistreamSelectError(lhs), Self::MultistreamSelectError(rhs)) => lhs == rhs, - (Self::SnowError(lhs), Self::SnowError(rhs)) => lhs == rhs, + (Self::Clatter(lhs), Self::Clatter(rhs)) => lhs == rhs, (Self::ParseError(lhs), Self::ParseError(rhs)) => lhs == rhs, (Self::IoError(lhs), Self::IoError(rhs)) => lhs == rhs, (Self::PeerIdMismatch(lhs, lhs_1), Self::PeerIdMismatch(rhs, rhs_1)) => @@ -456,12 +456,6 @@ impl From for Error { } } -impl From for Error { - fn from(error: snow::Error) -> Self { - Error::NegotiationError(NegotiationError::SnowError(error)) - } -} - impl From> for Error { fn from(_: tokio::sync::mpsc::error::SendError) -> Self { Error::EssentialTaskClosed diff --git a/client/litep2p/src/schema/keys.proto b/client/litep2p/src/schema/keys.proto index 8a31f19c..26f5f46d 100644 --- a/client/litep2p/src/schema/keys.proto +++ b/client/litep2p/src/schema/keys.proto @@ -3,8 +3,12 @@ syntax = "proto2"; package keys_proto; enum KeyType { - // Post-quantum only - all classical ECC/RSA removed for security - Dilithium = 0; // ML-DSA-87 post-quantum signature scheme + // Keep RSA/Ed25519/Secp256k1/ECDSA numbers for wire compatibility with libp2p + RSA = 0; + Ed25519 = 1; + Secp256k1 = 2; + ECDSA = 3; + Dilithium = 4; // ML-DSA-87 post-quantum signature scheme } message PublicKey { diff --git a/client/network/src/litep2p/mod.rs b/client/network/src/litep2p/mod.rs index fe9053b6..586db515 100644 --- a/client/network/src/litep2p/mod.rs +++ b/client/network/src/litep2p/mod.rs @@ -1186,7 +1186,7 @@ impl NetworkBackend for Litep2pNetworkBac NegotiationError::StateMismatch => "state-mismatch", NegotiationError::PeerIdMismatch(_,_) => "peer-id-missmatch", NegotiationError::MultistreamSelectError(_) => "multistream-select-error", - NegotiationError::SnowError(_) => "noise-error", + NegotiationError::Clatter(_) => "noise-error", NegotiationError::ParseError(_) => "parse-error", NegotiationError::IoError(_) => "io-error", NegotiationError::WebSocket(_) => "webscoket-error", From 6c1c0426a75fd5f550c1b45aa0db215280972648 Mon Sep 17 00:00:00 2001 From: illuzen Date: Sat, 30 May 2026 13:40:59 +0900 Subject: [PATCH 10/26] remove libp2p support --- Cargo.lock | 269 +-- Cargo.toml | 5 +- client/cli/Cargo.toml | 3 +- client/cli/src/arg_enums.rs | 3 - client/cli/src/commands/generate_node_key.rs | 9 +- client/cli/src/commands/inspect_node_key.rs | 9 +- client/cli/src/params/network_params.rs | 7 +- client/network-types/Cargo.toml | 2 - client/network-types/src/kad.rs | 42 - .../network-types/src/multiaddr/protocol.rs | 22 +- client/network-types/src/peer_id.rs | 24 - client/network/Cargo.toml | 2 - client/network/src/config.rs | 183 +- client/network/src/lib.rs | 37 +- client/network/src/litep2p/discovery.rs | 2 +- client/network/src/litep2p/mod.rs | 9 +- client/network/src/litep2p/service.rs | 11 +- client/network/src/litep2p/shim/mod.rs | 4 +- .../src/litep2p/shim/request_response/mod.rs | 27 +- client/network/src/network_state.rs | 24 +- client/network/src/peer_store.rs | 19 +- client/network/src/protocol_controller.rs | 14 +- client/network/src/service.rs | 2020 +---------------- client/network/src/service/signature.rs | 120 +- client/network/src/service/traits.rs | 60 +- node/src/command.rs | 53 +- 26 files changed, 319 insertions(+), 2661 deletions(-) diff --git a/Cargo.lock b/Cargo.lock index 65f9bf99..33c9d2ed 100644 --- a/Cargo.lock +++ b/Cargo.lock @@ -768,19 +768,6 @@ dependencies = [ "pin-project-lite 0.2.16", ] -[[package]] -name = "asynchronous-codec" -version = "0.7.0" -source = "registry+https://github.com/rust-lang/crates.io-index" -checksum = "a860072022177f903e59730004fb5dc13db9275b79bb2aef7ba8ce831956c233" -dependencies = [ - "bytes 1.11.1", - "futures-sink", - "futures-util", - "memchr", - "pin-project-lite 0.2.16", -] - [[package]] name = "atomic-take" version = "1.1.0" @@ -2651,12 +2638,6 @@ version = "1.2.1" source = "registry+https://github.com/rust-lang/crates.io-index" checksum = "75b325c5dbd37f80359721ad39aca5a29fb04c89279657cffdda8736d0c0b9d2" -[[package]] -name = "dtoa" -version = "1.0.10" -source = "registry+https://github.com/rust-lang/crates.io-index" -checksum = "d6add3b8cff394282be81f3fc1a0605db594ed69890078ca6e2cab1c408bcf04" - [[package]] name = "dunce" version = "1.0.5" @@ -2723,7 +2704,6 @@ checksum = "70e796c081cee67dc755e1a36a0a172b897fab85fc3f6bc48307991f64e4eca9" dependencies = [ "curve25519-dalek", "ed25519", - "rand_core 0.6.4", "serde", "sha2 0.10.9", "subtle 2.6.1", @@ -3530,16 +3510,6 @@ dependencies = [ "futures-util", ] -[[package]] -name = "futures-bounded" -version = "0.2.4" -source = "registry+https://github.com/rust-lang/crates.io-index" -checksum = "91f328e7fb845fc832912fb6a34f40cf6d1888c92f974d1893a54e97b5ff542e" -dependencies = [ - "futures-timer", - "futures-util", -] - [[package]] name = "futures-channel" version = "0.3.31" @@ -5079,20 +5049,13 @@ dependencies = [ "libp2p-connection-limits", "libp2p-core", "libp2p-dns", - "libp2p-identify", "libp2p-identity", - "libp2p-kad", "libp2p-mdns", - "libp2p-metrics", - "libp2p-noise", - "libp2p-ping", "libp2p-quic", - "libp2p-request-response", "libp2p-swarm", "libp2p-tcp", "libp2p-upnp", "libp2p-websocket", - "libp2p-yamux", "multiaddr 0.18.2", "pin-project", "rw-stream-sink", @@ -5167,74 +5130,22 @@ dependencies = [ "tracing", ] -[[package]] -name = "libp2p-identify" -version = "0.45.0" -source = "registry+https://github.com/rust-lang/crates.io-index" -checksum = "1711b004a273be4f30202778856368683bd9a83c4c7dcc8f848847606831a4e3" -dependencies = [ - "asynchronous-codec 0.7.0", - "either", - "futures 0.3.31", - "futures-bounded", - "futures-timer", - "libp2p-core", - "libp2p-identity", - "libp2p-swarm", - "lru 0.12.5", - "quick-protobuf", - "quick-protobuf-codec", - "smallvec", - "thiserror 1.0.69", - "tracing", - "void", -] - [[package]] name = "libp2p-identity" -version = "0.2.10" -source = "git+https://github.com/Quantus-Network/qp-libp2p-identity?tag=v0.2.11_patch_qp_rusty_crystals_dilithium_2_1#b9a7f46426efa2cf9b2ba20b95851ca18f361c95" +version = "0.2.13" +source = "registry+https://github.com/rust-lang/crates.io-index" +checksum = "f0c7892c221730ba55f7196e98b0b8ba5e04b4155651736036628e9f73ed6fc3" dependencies = [ "bs58", "ed25519-dalek", "hkdf", - "log", "multihash 0.19.3", - "qp-rusty-crystals-dilithium", - "quick-protobuf", - "rand 0.8.5", - "sha2 0.10.9", - "thiserror 1.0.69", - "zeroize", -] - -[[package]] -name = "libp2p-kad" -version = "0.46.2" -source = "registry+https://github.com/rust-lang/crates.io-index" -checksum = "ced237d0bd84bbebb7c2cad4c073160dacb4fe40534963c32ed6d4c6bb7702a3" -dependencies = [ - "arrayvec 0.7.6", - "asynchronous-codec 0.7.0", - "bytes 1.11.1", - "either", - "fnv", - "futures 0.3.31", - "futures-bounded", - "futures-timer", - "libp2p-core", - "libp2p-identity", - "libp2p-swarm", "quick-protobuf", - "quick-protobuf-codec", "rand 0.8.5", "sha2 0.10.9", - "smallvec", - "thiserror 1.0.69", + "thiserror 2.0.18", "tracing", - "uint 0.9.5", - "void", - "web-time", + "zeroize", ] [[package]] @@ -5258,65 +5169,6 @@ dependencies = [ "void", ] -[[package]] -name = "libp2p-metrics" -version = "0.15.0" -source = "registry+https://github.com/rust-lang/crates.io-index" -checksum = "77ebafa94a717c8442d8db8d3ae5d1c6a15e30f2d347e0cd31d057ca72e42566" -dependencies = [ - "futures 0.3.31", - "libp2p-core", - "libp2p-identify", - "libp2p-identity", - "libp2p-kad", - "libp2p-ping", - "libp2p-swarm", - "pin-project", - "prometheus-client", - "web-time", -] - -[[package]] -name = "libp2p-noise" -version = "0.45.10" -source = "git+https://github.com/Quantus-Network/qp-libp2p-noise?tag=v0.45.10#901f09f30b32f910395270bba3a566191dc2f61f" -dependencies = [ - "asynchronous-codec 0.6.2", - "bytes 1.11.1", - "clatter", - "futures 0.3.31", - "libp2p-core", - "libp2p-identity", - "log", - "multiaddr 0.17.1", - "multihash 0.17.0", - "quick-protobuf", - "rand 0.8.5", - "static_assertions", - "thiserror 1.0.69", - "tracing", - "x25519-dalek", - "zeroize", -] - -[[package]] -name = "libp2p-ping" -version = "0.45.0" -source = "registry+https://github.com/rust-lang/crates.io-index" -checksum = "005a34420359223b974ee344457095f027e51346e992d1e0dcd35173f4cdd422" -dependencies = [ - "either", - "futures 0.3.31", - "futures-timer", - "libp2p-core", - "libp2p-identity", - "libp2p-swarm", - "rand 0.8.5", - "tracing", - "void", - "web-time", -] - [[package]] name = "libp2p-quic" version = "0.11.1" @@ -5341,26 +5193,6 @@ dependencies = [ "tracing", ] -[[package]] -name = "libp2p-request-response" -version = "0.27.0" -source = "registry+https://github.com/rust-lang/crates.io-index" -checksum = "1356c9e376a94a75ae830c42cdaea3d4fe1290ba409a22c809033d1b7dcab0a6" -dependencies = [ - "async-trait", - "futures 0.3.31", - "futures-bounded", - "futures-timer", - "libp2p-core", - "libp2p-identity", - "libp2p-swarm", - "rand 0.8.5", - "smallvec", - "tracing", - "void", - "web-time", -] - [[package]] name = "libp2p-swarm" version = "0.45.1" @@ -5373,7 +5205,6 @@ dependencies = [ "futures-timer", "libp2p-core", "libp2p-identity", - "libp2p-swarm-derive", "lru 0.12.5", "multistream-select", "once_cell", @@ -5385,18 +5216,6 @@ dependencies = [ "web-time", ] -[[package]] -name = "libp2p-swarm-derive" -version = "0.35.0" -source = "registry+https://github.com/rust-lang/crates.io-index" -checksum = "206e0aa0ebe004d778d79fb0966aa0de996c19894e2c0605ba2f8524dd4443d8" -dependencies = [ - "heck 0.5.0", - "proc-macro2", - "quote", - "syn 2.0.106", -] - [[package]] name = "libp2p-tcp" version = "0.42.0" @@ -5470,21 +5289,6 @@ dependencies = [ "webpki-roots", ] -[[package]] -name = "libp2p-yamux" -version = "0.46.0" -source = "registry+https://github.com/rust-lang/crates.io-index" -checksum = "788b61c80789dba9760d8c669a5bedb642c8267555c803fabd8396e4ca5c5882" -dependencies = [ - "either", - "futures 0.3.31", - "libp2p-core", - "thiserror 1.0.69", - "tracing", - "yamux 0.12.1", - "yamux 0.13.10", -] - [[package]] name = "libredox" version = "0.1.10" @@ -5681,7 +5485,7 @@ dependencies = [ "webpki", "x25519-dalek", "x509-parser 0.17.0", - "yamux 0.13.10", + "yamux", "yasna 0.5.2", "zeroize", ] @@ -8079,29 +7883,6 @@ dependencies = [ "thiserror 1.0.69", ] -[[package]] -name = "prometheus-client" -version = "0.22.3" -source = "registry+https://github.com/rust-lang/crates.io-index" -checksum = "504ee9ff529add891127c4827eb481bd69dc0ebc72e9a682e187db4caa60c3ca" -dependencies = [ - "dtoa", - "itoa", - "parking_lot 0.12.4", - "prometheus-client-derive-encode", -] - -[[package]] -name = "prometheus-client-derive-encode" -version = "0.4.2" -source = "registry+https://github.com/rust-lang/crates.io-index" -checksum = "440f724eba9f6996b75d63681b0a92b06947f1457076d503a4d2e2c8f56442b8" -dependencies = [ - "proc-macro2", - "quote", - "syn 2.0.106", -] - [[package]] name = "proptest" version = "1.8.0" @@ -8790,19 +8571,6 @@ dependencies = [ "byteorder", ] -[[package]] -name = "quick-protobuf-codec" -version = "0.3.1" -source = "registry+https://github.com/rust-lang/crates.io-index" -checksum = "15a0580ab32b169745d7a39db2ba969226ca16738931be152a3209b409de2474" -dependencies = [ - "asynchronous-codec 0.7.0", - "bytes 1.11.1", - "quick-protobuf", - "thiserror 1.0.69", - "unsigned-varint 0.8.0", -] - [[package]] name = "quickcheck" version = "1.1.0" @@ -9657,7 +9425,7 @@ dependencies = [ "futures-timer", "hex", "itertools 0.11.0", - "libp2p-identity", + "litep2p", "log", "names", "parity-bip39", @@ -10011,7 +9779,7 @@ dependencies = [ "assert_matches", "async-channel 1.9.0", "async-trait", - "asynchronous-codec 0.6.2", + "asynchronous-codec", "bytes 1.11.1", "cid 0.9.0", "criterion", @@ -10020,8 +9788,6 @@ dependencies = [ "futures 0.3.31", "futures-timer", "ip_network", - "libp2p", - "libp2p-identity", "linked_hash_set", "litep2p", "log", @@ -10152,8 +9918,6 @@ version = "0.20.3" dependencies = [ "bs58", "bytes 1.11.1", - "libp2p-identity", - "libp2p-kad", "litep2p", "log", "multiaddr 0.18.2", @@ -13405,7 +13169,7 @@ version = "0.7.2" source = "registry+https://github.com/rust-lang/crates.io-index" checksum = "6889a77d49f1f013504cec6bf97a2c730394adedaeb1deb5ea08949a50541105" dependencies = [ - "asynchronous-codec 0.6.2", + "asynchronous-codec", "bytes 1.11.1", "futures-io", "futures-util", @@ -14948,21 +14712,6 @@ dependencies = [ "xml-rs", ] -[[package]] -name = "yamux" -version = "0.12.1" -source = "registry+https://github.com/rust-lang/crates.io-index" -checksum = "9ed0164ae619f2dc144909a9f082187ebb5893693d8c0196e8085283ccd4b776" -dependencies = [ - "futures 0.3.31", - "log", - "nohash-hasher", - "parking_lot 0.12.4", - "pin-project", - "rand 0.8.5", - "static_assertions", -] - [[package]] name = "yamux" version = "0.13.10" diff --git a/Cargo.toml b/Cargo.toml index b7cca92d..1000bf89 100644 --- a/Cargo.toml +++ b/Cargo.toml @@ -76,8 +76,7 @@ jsonrpsee = { version = "0.24.3" } lazy_static = { version = "1.5.0", default-features = false, features = [ "spin_no_std", ] } -libp2p = { version = "0.54.1" } -libp2p-identity = { git = "https://github.com/Quantus-Network/qp-libp2p-identity", tag = "v0.2.11_patch_qp_rusty_crystals_dilithium_2_1" } + linked_hash_set = { version = "0.1.4" } log = { version = "0.4.22", default-features = false } memory-db = { version = "0.34.0", default-features = false } @@ -253,8 +252,6 @@ substrate-wasm-builder = { version = "31.1.0", default-features = false } [patch.crates-io] frame-storage-access-test-runtime = { path = "./patches/frame-storage-access-test-runtime" } frame-system = { path = "./pallets/frame-system" } -libp2p-identity = { git = "https://github.com/Quantus-Network/qp-libp2p-identity", tag = "v0.2.11_patch_qp_rusty_crystals_dilithium_2_1" } -libp2p-noise = { git = "https://github.com/Quantus-Network/qp-libp2p-noise", tag = "v0.45.10" } litep2p = { path = "./client/litep2p" } sc-cli = { path = "./client/cli" } sc-network = { path = "client/network" } diff --git a/client/cli/Cargo.toml b/client/cli/Cargo.toml index ead9b8bd..aa44cba9 100644 --- a/client/cli/Cargo.toml +++ b/client/cli/Cargo.toml @@ -22,7 +22,6 @@ fdlimit = { workspace = true } futures = { workspace = true } hex = { workspace = true } itertools = { workspace = true } -libp2p-identity = { features = ["dilithium", "peerid"], workspace = true } log = { workspace = true, default-features = true } names = { workspace = true } qp-dilithium-crypto = { workspace = true, features = ["full_crypto", "serde", "std"] } @@ -40,6 +39,8 @@ sc-mixnet.default-features = true sc-mixnet.workspace = true sc-network.default-features = true sc-network.workspace = true +litep2p.default-features = true +litep2p.workspace = true sc-service.default-features = false sc-service.workspace = true sc-telemetry.default-features = true diff --git a/client/cli/src/arg_enums.rs b/client/cli/src/arg_enums.rs index 908f2995..4a0bfa03 100644 --- a/client/cli/src/arg_enums.rs +++ b/client/cli/src/arg_enums.rs @@ -312,14 +312,11 @@ impl Into for SyncMode { pub enum NetworkBackendType { /// Use litep2p for P2P networking (default, with Dilithium). Litep2p, - /// Use libp2p for P2P networking (stable, with Dilithium). - Libp2p, } impl Into for NetworkBackendType { fn into(self) -> sc_network::config::NetworkBackendType { match self { - Self::Libp2p => sc_network::config::NetworkBackendType::Libp2p, Self::Litep2p => sc_network::config::NetworkBackendType::Litep2p, } } diff --git a/client/cli/src/commands/generate_node_key.rs b/client/cli/src/commands/generate_node_key.rs index 998b8739..e9207daf 100644 --- a/client/cli/src/commands/generate_node_key.rs +++ b/client/cli/src/commands/generate_node_key.rs @@ -20,7 +20,7 @@ use crate::{build_network_key_dir_or_default, Error, NODE_KEY_DILITHIUM_FILE}; use clap::{Args, Parser}; -use libp2p_identity::PublicKey; +use litep2p::crypto::{PublicKey, dilithium::PublicKey as DilithiumPublicKey}; use qp_rusty_crystals_dilithium::{ml_dsa_87::Keypair, SensitiveBytes32}; use sc_service::BasePath; use sp_core::blake2_256; @@ -153,9 +153,12 @@ fn generate_key( }, } - let k = PublicKey::from(keypair.public); + let dilithium_pk = DilithiumPublicKey::try_from_bytes(&keypair.public.to_bytes()) + .expect("Valid Dilithium public key"); + let public_key = PublicKey::from(dilithium_pk); + let peer_id = litep2p::PeerId::from_public_key(&public_key); - eprintln!("{}", k.to_peer_id()); + eprintln!("{}", peer_id); Ok(()) } diff --git a/client/cli/src/commands/inspect_node_key.rs b/client/cli/src/commands/inspect_node_key.rs index beef0de6..f0a00480 100644 --- a/client/cli/src/commands/inspect_node_key.rs +++ b/client/cli/src/commands/inspect_node_key.rs @@ -20,7 +20,7 @@ use crate::Error; use clap::Parser; -use libp2p_identity::PublicKey; +use litep2p::crypto::{PublicKey, dilithium::PublicKey as DilithiumPublicKey}; use qp_rusty_crystals_dilithium::ml_dsa_87::Keypair; use std::{ fs, @@ -73,9 +73,12 @@ impl InspectNodeKeyCmd { let key = Keypair::from_bytes(file_data.as_slice()) .map_err(|_| "failed to decode secret as hex")?; - let keypair = PublicKey::from(key.public); + let dilithium_pk = DilithiumPublicKey::try_from_bytes(&key.public.to_bytes()) + .expect("Valid Dilithium public key"); + let public_key = PublicKey::from(dilithium_pk); + let peer_id = litep2p::PeerId::from_public_key(&public_key); - println!("{}", keypair.to_peer_id()); + println!("{}", peer_id); Ok(()) } diff --git a/client/cli/src/params/network_params.rs b/client/cli/src/params/network_params.rs index 95751def..9d418a72 100644 --- a/client/cli/src/params/network_params.rs +++ b/client/cli/src/params/network_params.rs @@ -173,16 +173,15 @@ pub struct NetworkParams { /// Network backend used for P2P networking. /// - /// Both backends use Dilithium (post-quantum) for node identity. - /// - litep2p: Default, lighter-weight networking stack - /// - libp2p: Battle-tested alternative + /// Uses Dilithium (post-quantum) for node identity. #[arg( long, value_enum, value_name = "NETWORK_BACKEND", default_value_t = NetworkBackendType::Litep2p, ignore_case = true, - verbatim_doc_comment + verbatim_doc_comment, + hide = true )] pub network_backend: NetworkBackendType, diff --git a/client/network-types/Cargo.toml b/client/network-types/Cargo.toml index 3950e37f..511d94b3 100644 --- a/client/network-types/Cargo.toml +++ b/client/network-types/Cargo.toml @@ -16,8 +16,6 @@ path = "src/lib.rs" [dependencies] bs58 = "0.5.1" bytes = { workspace = true } -libp2p-identity = { workspace = true } -libp2p-kad = { version = "0.46.2", default-features = false } litep2p = { workspace = true } log = { workspace = true } multiaddr = "0.18.1" diff --git a/client/network-types/src/kad.rs b/client/network-types/src/kad.rs index e844f976..d8814808 100644 --- a/client/network-types/src/kad.rs +++ b/client/network-types/src/kad.rs @@ -18,7 +18,6 @@ use crate::{multihash::Multihash, PeerId}; use bytes::Bytes; -use libp2p_kad::RecordKey as Libp2pKey; use litep2p::protocol::libp2p::kademlia::{Record as Litep2pRecord, RecordKey as Litep2pKey}; use std::{error::Error, fmt, time::Instant}; @@ -68,18 +67,6 @@ impl From for Litep2pKey { } } -impl From for Key { - fn from(key: Libp2pKey) -> Self { - Self::from(key.to_vec()) - } -} - -impl From for Libp2pKey { - fn from(key: Key) -> Self { - Self::from(key.to_vec()) - } -} - /// A record stored in the DHT. #[derive(Clone, Debug, Eq, PartialEq)] pub struct Record { @@ -105,15 +92,6 @@ impl Record { } } -impl From for Record { - fn from(out: libp2p_kad::Record) -> Self { - let vec: Vec = out.key.to_vec(); - let key: Key = vec.into(); - let publisher = out.publisher.map(Into::into); - Record { key, value: out.value, publisher, expires: out.expires } - } -} - impl From for Litep2pRecord { fn from(val: Record) -> Self { let vec: Vec = val.key.to_vec(); @@ -123,18 +101,6 @@ impl From for Litep2pRecord { } } -impl From for libp2p_kad::Record { - fn from(a: Record) -> libp2p_kad::Record { - let peer = a.publisher.map(Into::into); - libp2p_kad::Record { - key: a.key.to_vec().into(), - value: a.value, - publisher: peer, - expires: a.expires, - } - } -} - /// A record either received by the given peer or retrieved from the local /// record store. #[derive(Debug, Clone, PartialEq, Eq)] @@ -145,14 +111,6 @@ pub struct PeerRecord { pub record: Record, } -impl From for PeerRecord { - fn from(out: libp2p_kad::PeerRecord) -> Self { - let peer = out.peer.map(Into::into); - let record = out.record.into(); - PeerRecord { peer, record } - } -} - /// An error during signing of a message. #[derive(Debug)] pub struct SigningError { diff --git a/client/network-types/src/multiaddr/protocol.rs b/client/network-types/src/multiaddr/protocol.rs index 27a00afa..6bed444c 100644 --- a/client/network-types/src/multiaddr/protocol.rs +++ b/client/network-types/src/multiaddr/protocol.rs @@ -17,9 +17,8 @@ // along with this program. If not, see . use crate::multihash::Multihash; -use libp2p_identity::PeerId; use litep2p::types::multiaddr::Protocol as LiteP2pProtocol; -use multiaddr::Protocol as LibP2pProtocol; +use multiaddr::{Protocol as LibP2pProtocol, PeerId as MultiAddrPeerId}; use std::{ borrow::Cow, fmt::{self, Debug, Display}, @@ -246,15 +245,28 @@ impl<'a> From> for LibP2pProtocol<'a> { Protocol::Onion(str, port) => LibP2pProtocol::Onion(str, port), Protocol::Onion3(str, port) => LibP2pProtocol::Onion3((str.into_owned(), port).into()), Protocol::P2p(multihash) => { - LibP2pProtocol::P2p(PeerId::from_multihash(multihash.into()).unwrap_or_else(|_| { + LibP2pProtocol::P2p(MultiAddrPeerId::from_multihash(multihash.into()).unwrap_or_else(|mh| { // This is better than making conversion fallible and complicating the // client code. log::error!( target: LOG_TARGET, "Received multiaddr with p2p multihash which is not a valid \ - peer_id. Replacing with random peer_id." + peer_id. Using the multihash directly as identity." ); - PeerId::random() + // Create a peer ID from the invalid multihash - this will at least preserve + // some uniqueness for debugging. The underlying multiaddr will be invalid + // but this path should rarely be hit in practice. + let bytes = mh.to_bytes(); + MultiAddrPeerId::from_bytes(&bytes).unwrap_or_else(|_| { + // Last resort: generate from random bytes using identity hash + use rand::RngCore; + let mut random_bytes = [0u8; 32]; + rand::thread_rng().fill_bytes(&mut random_bytes); + // Use identity multihash (code 0x00) with 32 random bytes + let identity_mh = multihash::Multihash::<64>::wrap(0x00, &random_bytes) + .expect("identity hash with 32 bytes always fits"); + MultiAddrPeerId::from_multihash(identity_mh).expect("identity multihash is valid peer id") + }) })) }, Protocol::P2pCircuit => LibP2pProtocol::P2pCircuit, diff --git a/client/network-types/src/peer_id.rs b/client/network-types/src/peer_id.rs index 758a9f1a..9d8c9a1f 100644 --- a/client/network-types/src/peer_id.rs +++ b/client/network-types/src/peer_id.rs @@ -161,30 +161,6 @@ impl From for Multihash { } } -impl From for PeerId { - fn from(peer_id: libp2p_identity::PeerId) -> Self { - PeerId { multihash: Multihash::from_bytes(&peer_id.to_bytes()).expect("to succeed") } - } -} - -impl From for libp2p_identity::PeerId { - fn from(peer_id: PeerId) -> Self { - libp2p_identity::PeerId::from_bytes(&peer_id.to_bytes()).expect("to succeed") - } -} - -impl From<&libp2p_identity::PeerId> for PeerId { - fn from(peer_id: &libp2p_identity::PeerId) -> Self { - PeerId { multihash: Multihash::from_bytes(&peer_id.to_bytes()).expect("to succeed") } - } -} - -impl From<&PeerId> for libp2p_identity::PeerId { - fn from(peer_id: &PeerId) -> Self { - libp2p_identity::PeerId::from_bytes(&peer_id.to_bytes()).expect("to succeed") - } -} - impl From for PeerId { fn from(peer_id: litep2p::PeerId) -> Self { PeerId { multihash: Multihash::from_bytes(&peer_id.to_bytes()).expect("to succeed") } diff --git a/client/network/Cargo.toml b/client/network/Cargo.toml index 732901da..8d9257c2 100644 --- a/client/network/Cargo.toml +++ b/client/network/Cargo.toml @@ -37,8 +37,6 @@ fnv = { workspace = true } futures = { workspace = true } futures-timer = { workspace = true } ip_network = { workspace = true } -libp2p = { features = ["dns", "identify", "kad", "macros", "mdns", "noise", "ping", "request-response", "tcp", "tokio", "websocket", "yamux"], workspace = true } -libp2p-identity = { workspace = true, features = ["dilithium"] } litep2p = { path = "../litep2p", features = ["quic", "websocket"] } linked_hash_set = { workspace = true } log = { workspace = true, default-features = true } diff --git a/client/network/src/config.rs b/client/network/src/config.rs index f7f1c837..33bb36d0 100644 --- a/client/network/src/config.rs +++ b/client/network/src/config.rs @@ -22,11 +22,10 @@ //! See the documentation of [`Params`]. pub use crate::{ - discovery::DEFAULT_KADEMLIA_REPLICATION_FACTOR, + litep2p::DEFAULT_KADEMLIA_REPLICATION_FACTOR, peer_store::PeerStoreProvider, - protocol::{notification_service, NotificationsSink, ProtocolHandlePair}, - request_responses::{ - IncomingRequest, OutgoingResponse, ProtocolConfig as RequestResponseConfig, + litep2p::shim::notification::{ + config::{NotificationProtocolConfig, ProtocolControlHandle as ProtocolHandlePair}, }, service::{ metrics::NotificationMetrics, @@ -35,6 +34,10 @@ pub use crate::{ types::ProtocolName, }; +/// Type alias for compatibility with sc-service. +/// `NonDefaultSetConfig` was the libp2p name for notification protocol configuration. +pub type NonDefaultSetConfig = NotificationProtocolConfig; + pub use sc_network_types::build_multiaddr; use sc_network_types::{ multiaddr::{self, Multiaddr}, @@ -42,7 +45,6 @@ use sc_network_types::{ }; use crate::service::signature::Keypair; -use libp2p::identity as libp2p_identity; use crate::service::{ensure_addresses_consistent_with_transport, traits::NetworkBackend}; use codec::Encode; @@ -408,22 +410,19 @@ impl NodeKeyConfig { } } - /// Evaluate a `NodeKeyConfig` to obtain an identity `Keypair` (libp2p-identity, supports - /// Dilithium). + /// Evaluate a `NodeKeyConfig` to obtain an identity `Keypair` (litep2p, Dilithium). pub fn into_keypair(self) -> io::Result { use NodeKeyConfig::*; match self { - Dilithium(Secret::New) => - Ok(Keypair::Libp2p(libp2p_identity::Keypair::generate_dilithium())), + Dilithium(Secret::New) => Ok(Keypair::generate_dilithium()), - Dilithium(Secret::Input(k)) => libp2p_identity::Keypair::dilithium_from_bytes(&k) - .map_err(|e| io::Error::new(io::ErrorKind::InvalidData, e)) - .map(Keypair::Libp2p), + Dilithium(Secret::Input(k)) => Keypair::dilithium_from_bytes(&k) + .map_err(|e| io::Error::new(io::ErrorKind::InvalidData, format!("{:?}", e))), Dilithium(Secret::File(f)) => get_secret( f, |b| { - let mut bytes = if is_hex_data(b) { + let bytes = if is_hex_data(b) { array_bytes::hex2bytes(std::str::from_utf8(b).map_err(|_| { io::Error::new(io::ErrorKind::InvalidData, "Failed to decode hex data") })?) @@ -431,13 +430,12 @@ impl NodeKeyConfig { } else { b.to_vec() }; - libp2p_identity::Keypair::dilithium_from_bytes(&mut bytes) - .map_err(|e| io::Error::new(io::ErrorKind::InvalidData, e)) + Keypair::dilithium_from_bytes(&bytes) + .map_err(|e| io::Error::new(io::ErrorKind::InvalidData, format!("{:?}", e))) }, - || libp2p_identity::Keypair::generate_dilithium(), + Keypair::generate_dilithium, |kp| kp.dilithium_to_bytes(), - ) - .map(Keypair::Libp2p), + ), } } } @@ -532,135 +530,8 @@ impl Default for SetConfig { } } -/// Extension to [`SetConfig`] for sets that aren't the default set. -/// -/// > **Note**: As new fields might be added in the future, please consider using the `new` method -/// > and modifiers instead of creating this struct manually. -#[derive(Debug)] -pub struct NonDefaultSetConfig { - /// Name of the notifications protocols of this set. A substream on this set will be - /// considered established once this protocol is open. - /// - /// > **Note**: This field isn't present for the default set, as this is handled internally - /// > by the networking code. - protocol_name: ProtocolName, - - /// If the remote reports that it doesn't support the protocol indicated in the - /// `notifications_protocol` field, then each of these fallback names will be tried one by - /// one. - /// - /// If a fallback is used, it will be reported in - /// `sc_network::protocol::event::Event::NotificationStreamOpened::negotiated_fallback` - fallback_names: Vec, - - /// Handshake of the protocol - /// - /// NOTE: Currently custom handshakes are not fully supported. See issue #5685 for more - /// details. This field is temporarily used to allow moving the hardcoded block announcement - /// protocol out of `protocol.rs`. - handshake: Option, - - /// Maximum allowed size of single notifications. - max_notification_size: u64, - - /// Base configuration. - set_config: SetConfig, - - /// Notification handle. - /// - /// Notification handle is created during `NonDefaultSetConfig` creation and its other half, - /// `Box` is given to the protocol created the config and - /// `ProtocolHandle` is given to `Notifications` when it initializes itself. This handle allows - /// `Notifications ` to communicate with the protocol directly without relaying events through - /// `sc-network.` - protocol_handle_pair: ProtocolHandlePair, -} - -impl NonDefaultSetConfig { - /// Creates a new [`NonDefaultSetConfig`]. Zero slots and accepts only reserved nodes. - /// Also returns an object which allows the protocol to communicate with `Notifications`. - pub fn new( - protocol_name: ProtocolName, - fallback_names: Vec, - max_notification_size: u64, - handshake: Option, - set_config: SetConfig, - ) -> (Self, Box) { - let (protocol_handle_pair, notification_service) = - notification_service(protocol_name.clone()); - ( - Self { - protocol_name, - max_notification_size, - fallback_names, - handshake, - set_config, - protocol_handle_pair, - }, - notification_service, - ) - } - - /// Get reference to protocol name. - pub fn protocol_name(&self) -> &ProtocolName { - &self.protocol_name - } - - /// Get reference to fallback protocol names. - pub fn fallback_names(&self) -> impl Iterator { - self.fallback_names.iter() - } - - /// Get reference to handshake. - pub fn handshake(&self) -> &Option { - &self.handshake - } - - /// Get maximum notification size. - pub fn max_notification_size(&self) -> u64 { - self.max_notification_size - } - - /// Get reference to `SetConfig`. - pub fn set_config(&self) -> &SetConfig { - &self.set_config - } - - /// Take `ProtocolHandlePair` from `NonDefaultSetConfig` - pub fn take_protocol_handle(self) -> ProtocolHandlePair { - self.protocol_handle_pair - } - - /// Modifies the configuration to allow non-reserved nodes. - pub fn allow_non_reserved(&mut self, in_peers: u32, out_peers: u32) { - self.set_config.in_peers = in_peers; - self.set_config.out_peers = out_peers; - self.set_config.non_reserved_mode = NonReservedPeerMode::Accept; - } - - /// Add a node to the list of reserved nodes. - pub fn add_reserved(&mut self, peer: MultiaddrWithPeerId) { - self.set_config.reserved_nodes.push(peer); - } - - /// Add a list of protocol names used for backward compatibility. - /// - /// See the explanations in [`NonDefaultSetConfig::fallback_names`]. - pub fn add_fallback_names(&mut self, fallback_names: Vec) { - self.fallback_names.extend(fallback_names); - } -} - -impl NotificationConfig for NonDefaultSetConfig { - fn set_config(&self) -> &SetConfig { - &self.set_config - } - - /// Get reference to protocol name. - fn protocol_name(&self) -> &ProtocolName { - &self.protocol_name - } -} +// NOTE: NonDefaultSetConfig has been removed as it was part of the libp2p backend. +// Use litep2p's NotificationProtocolConfig directly instead. /// Network service configuration. #[derive(Clone, Debug)] @@ -776,7 +647,7 @@ impl NetworkConfiguration { kademlia_replication_factor: NonZeroUsize::new(DEFAULT_KADEMLIA_REPLICATION_FACTOR) .expect("value is a constant; constant is non-zero; qed."), ipfs_server: false, - network_backend: NetworkBackendType::Libp2p, + network_backend: NetworkBackendType::Litep2p, disable_peer_address_filtering: false, } } @@ -1007,17 +878,9 @@ impl> FullNetworkConfig pub enum NetworkBackendType { /// Use litep2p for P2P networking. /// - /// This is the preferred option for Substrate-based chains. + /// This is the only option for Quantus Network, using Dilithium (post-quantum) identity. #[default] Litep2p, - - /// Use libp2p for P2P networking. - /// - /// The libp2p is still used for compatibility reasons until the - /// ecosystem switches entirely to litep2p. The backend will enter - /// a "best-effort" maintenance mode, where only critical issues will - /// get fixed. If you are unsure, please use `NetworkBackendType::Litep2p`. - Libp2p, } #[cfg(test)] @@ -1030,9 +893,7 @@ mod tests { } fn secret_bytes(kp: &Keypair) -> Vec { - match kp { - Keypair::Libp2p(k) => k.dilithium_to_bytes(), - } + kp.dilithium_to_bytes() } #[test] @@ -1047,7 +908,7 @@ mod tests { #[test] fn test_secret_input() { - let kp0 = libp2p::identity::Keypair::generate_dilithium(); + let kp0 = Keypair::generate_dilithium(); let sk = kp0.dilithium_to_bytes(); let kp1 = NodeKeyConfig::Dilithium(Secret::Input(sk.clone())).into_keypair().unwrap(); let kp2 = NodeKeyConfig::Dilithium(Secret::Input(sk)).into_keypair().unwrap(); diff --git a/client/network/src/lib.rs b/client/network/src/lib.rs index fb4ef136..963bbf80 100644 --- a/client/network/src/lib.rs +++ b/client/network/src/lib.rs @@ -244,31 +244,46 @@ //! //! More precise usage details are still being worked on and will likely change in the future. -mod behaviour; -mod bitswap; +// NOTE: libp2p backend modules have been removed. Only litep2p backend is supported. +// The following modules were removed as they depend on libp2p: +// - behaviour (libp2p swarm behaviour) +// - bitswap (libp2p bitswap - litep2p has its own in litep2p/shim/bitswap.rs) +// - discovery (libp2p Kademlia - litep2p has its own in litep2p/discovery.rs) +// - protocol (libp2p notifications - litep2p has its own in litep2p/shim/notification/) +// - transport (libp2p transport - litep2p has its own transport) +// - request_responses (libp2p request-response - litep2p has its own in litep2p/shim/request_response/) + pub mod litep2p; -mod protocol; #[cfg(test)] mod mock; pub mod config; -pub mod discovery; pub mod error; pub mod event; pub mod network_state; -pub mod peer_info; +// NOTE: peer_info.rs is libp2p NetworkBehaviour - litep2p handles peer info differently +// pub mod peer_info; pub mod peer_store; pub mod protocol_controller; -pub mod request_responses; pub mod service; -pub mod transport; pub mod types; pub mod utils; +// Re-export request-response types from litep2p shim - this provides the `request_responses` module +pub mod request_responses { + pub use crate::litep2p::shim::request_response::{ + IncomingRequest, OutboundRequest, OutgoingResponse, RequestResponseConfig, + RequestResponseProtocol, + }; + pub use crate::service::traits::{IfDisconnected, RequestFailure, OutboundFailure}; + + /// Type alias for compatibility with sc-service which expects this name. + pub type ProtocolConfig = RequestResponseConfig; +} + pub use event::{DhtEvent, Event}; -#[doc(inline)] -pub use request_responses::{Config, IfDisconnected, RequestFailure}; +pub use request_responses::{IfDisconnected, RequestFailure}; pub use sc_network_common::{ role::{ObservedRole, Roles}, types::ReputationChange, @@ -279,7 +294,7 @@ pub use sc_network_types::{ }; pub use service::{ metrics::NotificationMetrics, - signature::Signature, + signature::{DecodingError, Keypair, PublicKey, Signature}, traits::{ KademliaKey, MessageSink, NetworkBackend, NetworkBlock, NetworkDHTProvider, NetworkEventStream, NetworkPeers, NetworkRequest, NetworkSigner, NetworkStateInfo, @@ -287,8 +302,6 @@ pub use service::{ NotificationSender as NotificationSenderT, NotificationSenderError, NotificationSenderReady, NotificationService, }, - DecodingError, Keypair, NetworkService, NetworkWorker, NotificationSender, OutboundFailure, - PublicKey, }; pub use types::ProtocolName; diff --git a/client/network/src/litep2p/discovery.rs b/client/network/src/litep2p/discovery.rs index 6c5eb945..1033ee0d 100644 --- a/client/network/src/litep2p/discovery.rs +++ b/client/network/src/litep2p/discovery.rs @@ -807,7 +807,7 @@ mod tests { // Build backends such that the first peer is known to all other peers. let backends = (0..10) .map(|i| { - let keypair = litep2p::crypto::ed25519::Keypair::generate(); + let keypair = litep2p::crypto::dilithium::Keypair::generate(); let peer_id: PeerId = keypair.public().to_peer_id().into(); let listen_addresses = Arc::new(RwLock::new(HashSet::new())); diff --git a/client/network/src/litep2p/mod.rs b/client/network/src/litep2p/mod.rs index 586db515..3496bd8c 100644 --- a/client/network/src/litep2p/mod.rs +++ b/client/network/src/litep2p/mod.rs @@ -20,7 +20,7 @@ use crate::{ config::{ - FullNetworkConfiguration, IncomingRequest, NodeKeyConfig, NotificationHandshake, Params, + FullNetworkConfiguration, NodeKeyConfig, NotificationHandshake, Params, SetConfig, TransportConfig, }, error::Error, @@ -35,7 +35,7 @@ use crate::{ config::{NotificationProtocolConfig, ProtocolControlHandle}, peerset::PeersetCommand, }, - request_response::{RequestResponseConfig, RequestResponseProtocol}, + request_response::{IncomingRequest, RequestResponseConfig, RequestResponseProtocol}, }, }, peer_store::PeerStoreProvider, @@ -97,7 +97,10 @@ use std::{ mod discovery; mod peerstore; mod service; -mod shim; +pub mod shim; + +/// Default Kademlia replication factor. +pub const DEFAULT_KADEMLIA_REPLICATION_FACTOR: usize = 20; /// Timeout for connection waiting new substreams. const KEEP_ALIVE_TIMEOUT: Duration = Duration::from_secs(10); diff --git a/client/network/src/litep2p/service.rs b/client/network/src/litep2p/service.rs index 13cbbff5..b31009bf 100644 --- a/client/network/src/litep2p/service.rs +++ b/client/network/src/litep2p/service.rs @@ -27,14 +27,15 @@ use crate::{ network_state::NetworkState, peer_store::PeerStoreProvider, service::out_events, - Event, IfDisconnected, NetworkDHTProvider, NetworkEventStream, NetworkPeers, NetworkRequest, - NetworkSigner, NetworkStateInfo, NetworkStatus, NetworkStatusProvider, OutboundFailure, - ProtocolName, RequestFailure, Signature, + service::traits::{IfDisconnected, OutboundFailure, RequestFailure}, + Event, NetworkDHTProvider, NetworkEventStream, NetworkPeers, NetworkRequest, + NetworkSigner, NetworkStateInfo, NetworkStatus, NetworkStatusProvider, + ProtocolName, Signature, }; use codec::DecodeAll; use futures::{channel::oneshot, stream::BoxStream}; -use libp2p::identity::SigningError; +use crate::service::signature::SigningError; use litep2p::{ addresses::PublicAddresses, crypto::dilithium::Keypair, types::multiaddr::Multiaddr as LiteP2pMultiaddr, @@ -250,7 +251,7 @@ impl NetworkSigner for Litep2pNetworkService { let bytes = self.keypair.sign(msg.as_ref()); Ok(Signature { - public_key: crate::service::signature::PublicKey::Litep2p( + public_key: crate::service::signature::PublicKey::from( litep2p::crypto::PublicKey::from(public_key), ), bytes, diff --git a/client/network/src/litep2p/shim/mod.rs b/client/network/src/litep2p/shim/mod.rs index 5eaf77ff..30cae555 100644 --- a/client/network/src/litep2p/shim/mod.rs +++ b/client/network/src/litep2p/shim/mod.rs @@ -19,5 +19,5 @@ //! Shims for fitting `litep2p` APIs to `sc-network` APIs. pub(crate) mod bitswap; -pub(crate) mod notification; -pub(crate) mod request_response; +pub mod notification; +pub mod request_response; diff --git a/client/network/src/litep2p/shim/request_response/mod.rs b/client/network/src/litep2p/shim/request_response/mod.rs index d30fdfdc..892b63fd 100644 --- a/client/network/src/litep2p/shim/request_response/mod.rs +++ b/client/network/src/litep2p/shim/request_response/mod.rs @@ -22,9 +22,8 @@ use crate::{ litep2p::shim::request_response::metrics::RequestResponseMetrics, peer_store::PeerStoreProvider, - request_responses::{IncomingRequest, OutgoingResponse}, - service::{metrics::Metrics, traits::RequestResponseConfig as RequestResponseConfigT}, - IfDisconnected, OutboundFailure, ProtocolName, RequestFailure, + service::{metrics::Metrics, traits::{IfDisconnected, OutboundFailure, RequestFailure, RequestResponseConfig as RequestResponseConfigT}}, + ProtocolName, }; use futures::{channel::oneshot, future::BoxFuture, stream::FuturesUnordered, StreamExt}; @@ -54,6 +53,28 @@ mod tests; /// Logging target for the file. const LOG_TARGET: &str = "sub-libp2p::request-response"; +/// Incoming request - represents a request received from a peer. +#[derive(Debug)] +pub struct IncomingRequest { + /// Peer that sent the request. + pub peer: PeerId, + /// Request data. + pub payload: Vec, + /// Channel for sending the response. + pub pending_response: oneshot::Sender, +} + +/// Outgoing response - represents a response to send to a peer. +#[derive(Debug)] +pub struct OutgoingResponse { + /// Response data. + pub result: Result, ()>, + /// Reputation changes for the peer. + pub reputation_changes: Vec, + /// Sent feedback. + pub sent_feedback: Option>, +} + /// Type containing information related to an outbound request. #[derive(Debug)] pub struct OutboundRequest { diff --git a/client/network/src/network_state.rs b/client/network/src/network_state.rs index 65fd4947..5755429c 100644 --- a/client/network/src/network_state.rs +++ b/client/network/src/network_state.rs @@ -20,10 +20,7 @@ //! //! **Warning**: These APIs are not stable. -use libp2p::{ - core::{ConnectedPoint, Endpoint as CoreEndpoint}, - Multiaddr, -}; +use sc_network_types::multiaddr::Multiaddr; use serde::{Deserialize, Serialize}; use std::{ collections::{HashMap, HashSet}, @@ -103,22 +100,11 @@ pub enum Endpoint { Listener, } -impl From for PeerEndpoint { - fn from(endpoint: ConnectedPoint) -> Self { - match endpoint { - ConnectedPoint::Dialer { address, role_override, port_use: _ } => - Self::Dialing(address, role_override.into()), - ConnectedPoint::Listener { local_addr, send_back_addr } => - Self::Listening { local_addr, send_back_addr }, - } - } -} - -impl From for Endpoint { - fn from(endpoint: CoreEndpoint) -> Self { +impl From for Endpoint { + fn from(endpoint: litep2p::transport::Endpoint) -> Self { match endpoint { - CoreEndpoint::Dialer => Self::Dialer, - CoreEndpoint::Listener => Self::Listener, + litep2p::transport::Endpoint::Dialer { .. } => Self::Dialer, + litep2p::transport::Endpoint::Listener { .. } => Self::Listener, } } } diff --git a/client/network/src/peer_store.rs b/client/network/src/peer_store.rs index 0e577915..4385fc09 100644 --- a/client/network/src/peer_store.rs +++ b/client/network/src/peer_store.rs @@ -21,7 +21,7 @@ use crate::service::{metrics::PeerStoreMetrics, traits::PeerStore as PeerStoreT}; -use libp2p::PeerId; +use sc_network_types::PeerId; use log::trace; use parking_lot::Mutex; use partial_sort::PartialSort; @@ -108,7 +108,7 @@ pub struct PeerStoreHandle { impl PeerStoreProvider for PeerStoreHandle { fn is_banned(&self, peer_id: &sc_network_types::PeerId) -> bool { - self.inner.lock().is_banned(&peer_id.into()) + self.inner.lock().is_banned(peer_id) } fn register_protocol(&self, protocol_handle: Arc) { @@ -117,25 +117,25 @@ impl PeerStoreProvider for PeerStoreHandle { fn report_disconnect(&self, peer_id: sc_network_types::PeerId) { let mut inner = self.inner.lock(); - inner.report_disconnect(peer_id.into()) + inner.report_disconnect(peer_id) } fn report_peer(&self, peer_id: sc_network_types::PeerId, change: ReputationChange) { let mut inner = self.inner.lock(); - inner.report_peer(peer_id.into(), change) + inner.report_peer(peer_id, change) } fn set_peer_role(&self, peer_id: &sc_network_types::PeerId, role: ObservedRole) { let mut inner = self.inner.lock(); - inner.set_peer_role(&peer_id.into(), role) + inner.set_peer_role(peer_id, role) } fn peer_reputation(&self, peer_id: &sc_network_types::PeerId) -> i32 { - self.inner.lock().peer_reputation(&peer_id.into()) + self.inner.lock().peer_reputation(peer_id) } fn peer_role(&self, peer_id: &sc_network_types::PeerId) -> Option { - self.inner.lock().peer_role(&peer_id.into()) + self.inner.lock().peer_role(peer_id) } fn outgoing_candidates( @@ -145,10 +145,7 @@ impl PeerStoreProvider for PeerStoreHandle { ) -> Vec { self.inner .lock() - .outgoing_candidates(count, ignored.iter().map(|peer_id| (*peer_id).into()).collect()) - .iter() - .map(|peer_id| peer_id.into()) - .collect() + .outgoing_candidates(count, ignored) } fn add_known_peer(&self, peer_id: sc_network_types::PeerId) { diff --git a/client/network/src/protocol_controller.rs b/client/network/src/protocol_controller.rs index 11f53212..c61f4331 100644 --- a/client/network/src/protocol_controller.rs +++ b/client/network/src/protocol_controller.rs @@ -44,7 +44,7 @@ use crate::peer_store::{PeerStoreProvider, ProtocolHandle as ProtocolHandleT}; use futures::{channel::oneshot, future::Either, FutureExt, StreamExt}; -use libp2p::PeerId; +use sc_network_types::PeerId; use log::{debug, error, trace, warn}; use sc_utils::mpsc::{tracing_unbounded, TracingUnboundedReceiver, TracingUnboundedSender}; use sp_arithmetic::traits::SaturatedConversion; @@ -452,12 +452,12 @@ impl ProtocolController { /// Report peer disconnect event to `PeerStore` for it to update peer's reputation accordingly. /// Should only be called if the remote node disconnected us, not the other way around. fn report_disconnect(&mut self, peer_id: PeerId) { - self.peer_store.report_disconnect(peer_id.into()); + self.peer_store.report_disconnect(peer_id); } /// Ask `Peerset` if the peer has a reputation value not sufficient for connection with it. fn is_banned(&self, peer_id: &PeerId) -> bool { - self.peer_store.is_banned(&peer_id.into()) + self.peer_store.is_banned(peer_id) } /// Add the peer to the set of reserved peers. [`ProtocolController`] will try to always @@ -785,7 +785,7 @@ impl ProtocolController { self.reserved_nodes .iter_mut() .filter_map(|(peer_id, state)| { - (!state.is_connected() && !self.peer_store.is_banned(&peer_id.into())).then(|| { + (!state.is_connected() && !self.peer_store.is_banned(peer_id)).then(|| { *state = PeerState::Connected(Direction::Outbound); peer_id }) @@ -810,10 +810,10 @@ impl ProtocolController { let ignored = self .reserved_nodes .keys() - .map(From::from) - .collect::>() + .cloned() + .collect::>() .union( - &self.nodes.keys().map(From::from).collect::>(), + &self.nodes.keys().cloned().collect::>(), ) .cloned() .collect(); diff --git a/client/network/src/service.rs b/client/network/src/service.rs index 4236ea52..6207740e 100644 --- a/client/network/src/service.rs +++ b/client/network/src/service.rs @@ -16,2014 +16,32 @@ // You should have received a copy of the GNU General Public License // along with this program. If not, see . -//! Main entry point of the sc-network crate. +//! Network service module. //! -//! There are two main structs in this module: [`NetworkWorker`] and [`NetworkService`]. -//! The [`NetworkWorker`] *is* the network. Network is driven by [`NetworkWorker::run`] future that -//! terminates only when all instances of the control handles [`NetworkService`] were dropped. -//! The [`NetworkService`] is merely a shared version of the [`NetworkWorker`]. You can obtain an -//! `Arc` by calling [`NetworkWorker::service`]. -//! -//! The methods of the [`NetworkService`] are implemented by sending a message over a channel, -//! which is then processed by [`NetworkWorker::next_action`]. - -use crate::{ - behaviour::{self, Behaviour, BehaviourOut}, - bitswap::BitswapRequestHandler, - config::{ - parse_addr, FullNetworkConfiguration, IncomingRequest, MultiaddrWithPeerId, - NonDefaultSetConfig, NotificationHandshake, Params, SetConfig, - TransportConfig, - }, - discovery::DiscoveryConfig, - error::Error, - event::{DhtEvent, Event}, - network_state::{ - NetworkState, NotConnectedPeer as NetworkStateNotConnectedPeer, Peer as NetworkStatePeer, - }, - peer_store::{PeerStore, PeerStoreProvider}, - protocol::{self, Protocol, Ready}, - protocol_controller::{self, ProtoSetConfig, ProtocolController, SetId}, - request_responses::{IfDisconnected, ProtocolConfig as RequestResponseConfig, RequestFailure}, - service::{ - signature::{Signature, SigningError}, - traits::{ - BandwidthSink, NetworkBackend, NetworkDHTProvider, NetworkEventStream, NetworkPeers, - NetworkRequest, NetworkService as NetworkServiceT, NetworkSigner, NetworkStateInfo, - NetworkStatus, NetworkStatusProvider, NotificationSender as NotificationSenderT, - NotificationSenderError, NotificationSenderReady as NotificationSenderReadyT, - }, - }, - transport, - types::ProtocolName, - NotificationService, ReputationChange, -}; +//! This module provides shared types and traits used by the litep2p network backend. +//! The libp2p backend has been removed - only litep2p is supported. -use codec::DecodeAll; -use futures::{channel::oneshot, prelude::*}; -use libp2p::{ - connection_limits::{ConnectionLimits, Exceeded}, - core::{upgrade, ConnectedPoint, Endpoint}, - identify::Info as IdentifyInfo, - multiaddr::{self, Multiaddr}, - swarm::{ - Config as SwarmConfig, ConnectionError, ConnectionId, DialError, Executor, ListenError, - NetworkBehaviour, Swarm, SwarmEvent, - }, - PeerId, -}; -use log::{debug, error, info, trace, warn}; -use metrics::{Histogram, MetricSources, Metrics}; -use parking_lot::Mutex; -use prometheus_endpoint::Registry; -use sc_network_types::kad::{Key as KademliaKey, Record}; +use sc_network_types::{multiaddr::Multiaddr, PeerId}; +use std::collections::HashSet; -use sc_client_api::BlockBackend; -use sc_network_common::{ - role::{ObservedRole, Roles}, - ExHashT, -}; -use sc_utils::mpsc::{tracing_unbounded, TracingUnboundedReceiver, TracingUnboundedSender}; -use sp_runtime::traits::Block as BlockT; - -pub use behaviour::{InboundFailure, OutboundFailure, ResponseFailure}; -pub use libp2p::identity::DecodingError; -pub use metrics::NotificationMetrics; -pub use protocol::NotificationsSink; -pub use signature::{Keypair, PublicKey}; -use std::{ - collections::{HashMap, HashSet}, - fs, iter, - marker::PhantomData, - num::NonZeroUsize, - pin::Pin, - str, - sync::{ - atomic::{AtomicUsize, Ordering}, - Arc, - }, - time::{Duration, Instant}, -}; - -pub(crate) mod metrics; +pub mod metrics; pub(crate) mod out_events; pub mod signature; pub mod traits; -/// Logging target for the file. -const LOG_TARGET: &str = "sub-libp2p"; - -/// Minimum allowed port for blockchain p2p connections. -const MIN_P2P_PORT: u16 = 30333; -/// Maximum allowed port for blockchain p2p connections. -const MAX_P2P_PORT: u16 = 30533; - -struct Libp2pBandwidthSink { - #[allow(deprecated)] - sink: Arc, -} - -impl BandwidthSink for Libp2pBandwidthSink { - fn total_inbound(&self) -> u64 { - self.sink.total_inbound() - } - - fn total_outbound(&self) -> u64 { - self.sink.total_outbound() - } -} - -/// Substrate network service. Handles network IO and manages connectivity. -pub struct NetworkService { - /// Number of peers we're connected to. - num_connected: Arc, - /// The local external addresses. - external_addresses: Arc>>, - /// Listen addresses. Do **NOT** include a trailing `/p2p/` with our `PeerId`. - listen_addresses: Arc>>, - /// Local copy of the `PeerId` of the local node. - local_peer_id: PeerId, - /// The `KeyPair` that defines the `PeerId` of the local node. - local_identity: Keypair, - /// Bandwidth logging system. Can be queried to know the average bandwidth consumed. - bandwidth: Arc, - /// Channel that sends messages to the actual worker. - to_worker: TracingUnboundedSender, - /// Protocol name -> `SetId` mapping for notification protocols. The map never changes after - /// initialization. - notification_protocol_ids: HashMap, - /// Handles to manage peer connections on notification protocols. The vector never changes - /// after initialization. - protocol_handles: Vec, - /// Shortcut to sync protocol handle (`protocol_handles[0]`). - sync_protocol_handle: protocol_controller::ProtocolHandle, - /// Handle to `PeerStore`. - peer_store_handle: Arc, - /// Marker to pin the `H` generic. Serves no purpose except to not break backwards - /// compatibility. - _marker: PhantomData, - /// Marker for block type - _block: PhantomData, -} - -#[async_trait::async_trait] -impl NetworkBackend for NetworkWorker -where - B: BlockT + 'static, - H: ExHashT, -{ - type NotificationProtocolConfig = NonDefaultSetConfig; - type RequestResponseProtocolConfig = RequestResponseConfig; - type NetworkService = Arc>; - type PeerStore = PeerStore; - type BitswapConfig = RequestResponseConfig; - - fn new(params: Params) -> Result - where - Self: Sized, - { - NetworkWorker::new(params) - } - - /// Get handle to `NetworkService` of the `NetworkBackend`. - fn network_service(&self) -> Arc { - self.service.clone() - } - - /// Create `PeerStore`. - fn peer_store( - bootnodes: Vec, - metrics_registry: Option, - ) -> Self::PeerStore { - PeerStore::new(bootnodes.into_iter().map(From::from).collect(), metrics_registry) - } - - fn register_notification_metrics(registry: Option<&Registry>) -> NotificationMetrics { - NotificationMetrics::new(registry) - } - - fn bitswap_server( - client: Arc + Send + Sync>, - ) -> (Pin + Send>>, Self::BitswapConfig) { - let (handler, protocol_config) = BitswapRequestHandler::new(client.clone()); - - (Box::pin(async move { handler.run().await }), protocol_config) - } - - /// Create notification protocol configuration. - fn notification_config( - protocol_name: ProtocolName, - fallback_names: Vec, - max_notification_size: u64, - handshake: Option, - set_config: SetConfig, - _metrics: NotificationMetrics, - _peerstore_handle: Arc, - ) -> (Self::NotificationProtocolConfig, Box) { - NonDefaultSetConfig::new( - protocol_name, - fallback_names, - max_notification_size, - handshake, - set_config, - ) - } - - /// Create request-response protocol configuration. - fn request_response_config( - protocol_name: ProtocolName, - fallback_names: Vec, - max_request_size: u64, - max_response_size: u64, - request_timeout: Duration, - inbound_queue: Option>, - ) -> Self::RequestResponseProtocolConfig { - Self::RequestResponseProtocolConfig { - name: protocol_name, - fallback_names, - max_request_size, - max_response_size, - request_timeout, - inbound_queue, - } - } - - /// Start [`NetworkBackend`] event loop. - async fn run(mut self) { - self.run().await - } -} - -impl NetworkWorker -where - B: BlockT + 'static, - H: ExHashT, -{ - /// Creates the network service. - /// - /// Returns a `NetworkWorker` that implements `Future` and must be regularly polled in order - /// for the network processing to advance. From it, you can extract a `NetworkService` using - /// `worker.service()`. The `NetworkService` can be shared through the codebase. - pub fn new(params: Params) -> Result { - let peer_store_handle = params.network_config.peer_store_handle(); - let FullNetworkConfiguration { - notification_protocols, - request_response_protocols, - mut network_config, - .. - } = params.network_config; - - // Note: This NetworkWorker is specifically for the Libp2p backend. - // The Litep2p backend uses Litep2pNetworkBackend instead. - // Both backends now support Dilithium (post-quantum). - - // Store before network_config is moved. - let disable_peer_address_filtering = network_config.disable_peer_address_filtering; - - // Private and public keys configuration (libp2p-identity, supports Dilithium). - let local_identity = network_config.node_key.clone().into_keypair()?; - let local_public = local_identity.public(); - let local_peer_id: PeerId = local_public.to_peer_id().into(); - - // For transport and behaviour we need libp2p::identity types. - // Note: This NetworkWorker is the libp2p backend implementation. - // The litep2p backend uses Litep2pNetworkBackend in client/network/src/litep2p/. - let local_identity_for_transport = match &local_identity { - Keypair::Libp2p(kp) => kp.clone(), - }; - let local_public_libp2p = match &local_identity.public() { - PublicKey::Libp2p(p) => p.clone(), - PublicKey::Litep2p(_) => unreachable!("NetworkWorker (libp2p backend) only uses libp2p keys"), - }; - - network_config.boot_nodes = network_config - .boot_nodes - .into_iter() - .filter(|boot_node| boot_node.peer_id != local_peer_id.into()) - .collect(); - network_config.default_peers_set.reserved_nodes = network_config - .default_peers_set - .reserved_nodes - .into_iter() - .filter(|reserved_node| { - if reserved_node.peer_id == local_peer_id.into() { - warn!( - target: LOG_TARGET, - "Local peer ID used in reserved node, ignoring: {}", - reserved_node, - ); - false - } else { - true - } - }) - .collect(); - - // Ensure the listen addresses are consistent with the transport. - ensure_addresses_consistent_with_transport( - network_config.listen_addresses.iter(), - &network_config.transport, - )?; - ensure_addresses_consistent_with_transport( - network_config.boot_nodes.iter().map(|x| &x.multiaddr), - &network_config.transport, - )?; - ensure_addresses_consistent_with_transport( - network_config.default_peers_set.reserved_nodes.iter().map(|x| &x.multiaddr), - &network_config.transport, - )?; - for notification_protocol in ¬ification_protocols { - ensure_addresses_consistent_with_transport( - notification_protocol.set_config().reserved_nodes.iter().map(|x| &x.multiaddr), - &network_config.transport, - )?; - } - ensure_addresses_consistent_with_transport( - network_config.public_addresses.iter(), - &network_config.transport, - )?; - - let (to_worker, from_service) = tracing_unbounded("mpsc_network_worker", 100_000); - - if let Some(path) = &network_config.net_config_path { - fs::create_dir_all(path)?; - } - - info!( - target: LOG_TARGET, - "🏷 Local node identity is: {}", - local_peer_id.to_base58(), - ); - info!(target: LOG_TARGET, "Running libp2p network backend"); - - let (transport, bandwidth) = { - let config_mem = match network_config.transport { - TransportConfig::MemoryOnly => true, - TransportConfig::Normal { .. } => false, - }; - - transport::build_transport(local_identity_for_transport, config_mem) - }; - - let (to_notifications, from_protocol_controllers) = - tracing_unbounded("mpsc_protocol_controllers_to_notifications", 10_000); - - // We must prepend a hardcoded default peer set to notification protocols. - let all_peer_sets_iter = iter::once(&network_config.default_peers_set) - .chain(notification_protocols.iter().map(|protocol| protocol.set_config())); - - let (protocol_handles, protocol_controllers): (Vec<_>, Vec<_>) = all_peer_sets_iter - .enumerate() - .map(|(set_id, set_config)| { - let proto_set_config = ProtoSetConfig { - in_peers: set_config.in_peers, - out_peers: set_config.out_peers, - reserved_nodes: set_config - .reserved_nodes - .iter() - .map(|node| node.peer_id.into()) - .collect(), - reserved_only: set_config.non_reserved_mode.is_reserved_only(), - }; - - ProtocolController::new( - SetId::from(set_id), - proto_set_config, - to_notifications.clone(), - Arc::clone(&peer_store_handle), - ) - }) - .unzip(); - - // Shortcut to default (sync) peer set protocol handle. - let sync_protocol_handle = protocol_handles[0].clone(); - - // Spawn `ProtocolController` runners. - protocol_controllers - .into_iter() - .for_each(|controller| (params.executor)(controller.run().boxed())); - - // Protocol name to protocol id mapping. The first protocol is always block announce (sync) - // protocol, aka default (hardcoded) peer set. - let notification_protocol_ids: HashMap = - iter::once(¶ms.block_announce_config) - .chain(notification_protocols.iter()) - .enumerate() - .map(|(index, protocol)| (protocol.protocol_name().clone(), SetId::from(index))) - .collect(); - - let known_addresses = { - // Collect all reserved nodes and bootnodes addresses. - let mut addresses: Vec<_> = network_config - .default_peers_set - .reserved_nodes - .iter() - .map(|reserved| (reserved.peer_id, reserved.multiaddr.clone())) - .chain(notification_protocols.iter().flat_map(|protocol| { - protocol - .set_config() - .reserved_nodes - .iter() - .map(|reserved| (reserved.peer_id, reserved.multiaddr.clone())) - })) - .chain( - network_config - .boot_nodes - .iter() - .map(|bootnode| (bootnode.peer_id, bootnode.multiaddr.clone())), - ) - .collect(); - - // Remove possible duplicates. - addresses.sort(); - addresses.dedup(); - - addresses - }; - - // Check for duplicate bootnodes. - network_config.boot_nodes.iter().try_for_each(|bootnode| { - if let Some(other) = network_config - .boot_nodes - .iter() - .filter(|o| o.multiaddr == bootnode.multiaddr) - .find(|o| o.peer_id != bootnode.peer_id) - { - Err(Error::DuplicateBootnode { - address: bootnode.multiaddr.clone().into(), - first_id: bootnode.peer_id.into(), - second_id: other.peer_id.into(), - }) - } else { - Ok(()) - } - })?; - - // List of bootnode multiaddresses. - let mut boot_node_ids = HashMap::>::new(); - - for bootnode in network_config.boot_nodes.iter() { - boot_node_ids - .entry(bootnode.peer_id.into()) - .or_default() - .push(bootnode.multiaddr.clone().into()); - } - - let boot_node_ids = Arc::new(boot_node_ids); - - let num_connected = Arc::new(AtomicUsize::new(0)); - let external_addresses = Arc::new(Mutex::new(HashSet::new())); - - let (protocol, notif_protocol_handles) = Protocol::new( - From::from(¶ms.role), - params.notification_metrics, - notification_protocols, - params.block_announce_config, - Arc::clone(&peer_store_handle), - protocol_handles.clone(), - from_protocol_controllers, - )?; - - // Build the swarm. - let (mut swarm, bandwidth): (Swarm>, _) = { - let user_agent = - format!("{} ({})", network_config.client_version, network_config.node_name); - - let discovery_config = { - let mut config = DiscoveryConfig::new(local_peer_id); - config.with_permanent_addresses( - known_addresses - .iter() - .map(|(peer, address)| (peer.into(), address.clone().into())) - .collect::>(), - ); - config.discovery_limit(u64::from(network_config.default_peers_set.out_peers) + 15); - config.with_kademlia( - params.genesis_hash, - params.fork_id.as_deref(), - ¶ms.protocol_id, - ); - config.with_dht_random_walk(network_config.enable_dht_random_walk); - config.allow_non_globals_in_dht(network_config.allow_non_globals_in_dht); - config.use_kademlia_disjoint_query_paths( - network_config.kademlia_disjoint_query_paths, - ); - config.with_kademlia_replication_factor(network_config.kademlia_replication_factor); - - match network_config.transport { - TransportConfig::MemoryOnly => { - config.with_mdns(false); - config.allow_private_ip(false); - }, - TransportConfig::Normal { - enable_mdns, - allow_private_ip: allow_private_ipv4, - .. - } => { - config.with_mdns(enable_mdns); - config.allow_private_ip(allow_private_ipv4); - }, - } - - config - }; - - let behaviour = { - let result = Behaviour::new( - protocol, - user_agent, - local_public_libp2p, - discovery_config, - request_response_protocols, - Arc::clone(&peer_store_handle), - external_addresses.clone(), - network_config.public_addresses.iter().cloned().map(Into::into).collect(), - ConnectionLimits::default() - .with_max_established_per_peer(Some(crate::MAX_CONNECTIONS_PER_PEER as u32)) - .with_max_established_incoming(Some( - crate::MAX_CONNECTIONS_ESTABLISHED_INCOMING, - )), - ); - - match result { - Ok(b) => b, - Err(crate::request_responses::RegisterError::DuplicateProtocol(proto)) => - return Err(Error::DuplicateRequestResponseProtocol { protocol: proto }), - } - }; - - let swarm = { - struct SpawnImpl(F); - impl + Send>>)> Executor for SpawnImpl { - fn exec(&self, f: Pin + Send>>) { - (self.0)(f) - } - } - - let config = SwarmConfig::with_executor(SpawnImpl(params.executor)) - .with_substream_upgrade_protocol_override(upgrade::Version::V1) - .with_notify_handler_buffer_size(NonZeroUsize::new(32).expect("32 != 0; qed")) - // NOTE: 24 is somewhat arbitrary and should be tuned in the future if - // necessary. See - .with_per_connection_event_buffer_size(24) - .with_max_negotiating_inbound_streams(2048) - .with_idle_connection_timeout(network_config.idle_connection_timeout); - - Swarm::new(transport, behaviour, local_peer_id, config) - }; - - (swarm, Arc::new(Libp2pBandwidthSink { sink: bandwidth })) - }; - - // Initialize the metrics. - let metrics = match ¶ms.metrics_registry { - Some(registry) => Some(metrics::register( - registry, - MetricSources { - bandwidth: bandwidth.clone(), - connected_peers: num_connected.clone(), - }, - )?), - None => None, - }; - - // Listen on multiaddresses. - for addr in &network_config.listen_addresses { - if let Err(err) = Swarm::>::listen_on(&mut swarm, addr.clone().into()) { - warn!(target: LOG_TARGET, "Can't listen on {} because: {:?}", addr, err) - } - } - - // Add external addresses. - for addr in &network_config.public_addresses { - Swarm::>::add_external_address(&mut swarm, addr.clone().into()); - } - - let listen_addresses_set = Arc::new(Mutex::new(HashSet::new())); - - let service = Arc::new(NetworkService { - bandwidth, - external_addresses, - listen_addresses: listen_addresses_set.clone(), - num_connected: num_connected.clone(), - local_peer_id, - local_identity, - to_worker, - notification_protocol_ids, - protocol_handles, - sync_protocol_handle, - peer_store_handle: Arc::clone(&peer_store_handle), - _marker: PhantomData, - _block: Default::default(), - }); - - Ok(NetworkWorker { - listen_addresses: listen_addresses_set, - num_connected, - network_service: swarm, - service, - from_service, - event_streams: out_events::OutChannels::new(params.metrics_registry.as_ref())?, - metrics, - boot_node_ids, - reported_invalid_boot_nodes: Default::default(), - peer_store_handle: Arc::clone(&peer_store_handle), - notif_protocol_handles, - _marker: Default::default(), - _block: Default::default(), - disable_peer_address_filtering, - }) - } - - /// High-level network status information. - pub fn status(&self) -> NetworkStatus { - NetworkStatus { - num_connected_peers: self.num_connected_peers(), - total_bytes_inbound: self.total_bytes_inbound(), - total_bytes_outbound: self.total_bytes_outbound(), - } - } - - /// Returns the total number of bytes received so far. - pub fn total_bytes_inbound(&self) -> u64 { - self.service.bandwidth.total_inbound() - } - - /// Returns the total number of bytes sent so far. - pub fn total_bytes_outbound(&self) -> u64 { - self.service.bandwidth.total_outbound() - } - - /// Returns the number of peers we're connected to. - pub fn num_connected_peers(&self) -> usize { - self.network_service.behaviour().user_protocol().num_sync_peers() - } - - /// Adds an address for a node. - pub fn add_known_address(&mut self, peer_id: PeerId, addr: Multiaddr) { - self.network_service.behaviour_mut().add_known_address(peer_id, addr); - } - - /// Return a `NetworkService` that can be shared through the code base and can be used to - /// manipulate the worker. - pub fn service(&self) -> &Arc> { - &self.service - } - - /// Returns the local `PeerId`. - pub fn local_peer_id(&self) -> &PeerId { - Swarm::>::local_peer_id(&self.network_service) - } - - /// Returns the list of addresses we are listening on. - /// - /// Does **NOT** include a trailing `/p2p/` with our `PeerId`. - pub fn listen_addresses(&self) -> impl Iterator { - Swarm::>::listeners(&self.network_service) - } - - /// Get network state. - /// - /// **Note**: Use this only for debugging. This API is unstable. There are warnings literally - /// everywhere about this. Please don't use this function to retrieve actual information. - pub fn network_state(&mut self) -> NetworkState { - let swarm = &mut self.network_service; - let open = swarm.behaviour_mut().user_protocol().open_peers().cloned().collect::>(); - let connected_peers = { - let swarm = &mut *swarm; - open.iter() - .filter_map(move |peer_id| { - let known_addresses = if let Ok(addrs) = - NetworkBehaviour::handle_pending_outbound_connection( - swarm.behaviour_mut(), - ConnectionId::new_unchecked(0), // dummy value - Some(*peer_id), - &vec![], - Endpoint::Listener, - ) { - addrs.into_iter().collect() - } else { - error!(target: LOG_TARGET, "Was not able to get known addresses for {:?}", peer_id); - return None - }; - - let endpoint = if let Some(e) = - swarm.behaviour_mut().node(peer_id).and_then(|i| i.endpoint()) - { - e.clone().into() - } else { - error!(target: LOG_TARGET, "Found state inconsistency between custom protocol \ - and debug information about {:?}", peer_id); - return None - }; - - Some(( - peer_id.to_base58(), - NetworkStatePeer { - endpoint, - version_string: swarm - .behaviour_mut() - .node(peer_id) - .and_then(|i| i.client_version().map(|s| s.to_owned())), - latest_ping_time: swarm - .behaviour_mut() - .node(peer_id) - .and_then(|i| i.latest_ping()), - known_addresses, - }, - )) - }) - .collect() - }; - - let not_connected_peers = { - let swarm = &mut *swarm; - swarm - .behaviour_mut() - .known_peers() - .into_iter() - .filter(|p| open.iter().all(|n| n != p)) - .map(move |peer_id| { - let known_addresses = if let Ok(addrs) = - NetworkBehaviour::handle_pending_outbound_connection( - swarm.behaviour_mut(), - ConnectionId::new_unchecked(0), // dummy value - Some(peer_id), - &vec![], - Endpoint::Listener, - ) { - addrs.into_iter().collect() - } else { - error!(target: LOG_TARGET, "Was not able to get known addresses for {:?}", peer_id); - Default::default() - }; - - ( - peer_id.to_base58(), - NetworkStateNotConnectedPeer { - version_string: swarm - .behaviour_mut() - .node(&peer_id) - .and_then(|i| i.client_version().map(|s| s.to_owned())), - latest_ping_time: swarm - .behaviour_mut() - .node(&peer_id) - .and_then(|i| i.latest_ping()), - known_addresses, - }, - ) - }) - .collect() - }; - - let peer_id = Swarm::>::local_peer_id(swarm).to_base58(); - let listened_addresses = swarm.listeners().cloned().collect(); - let external_addresses = swarm.external_addresses().cloned().collect(); - - NetworkState { - peer_id, - listened_addresses, - external_addresses, - connected_peers, - not_connected_peers, - // TODO: Check what info we can include here. - // Issue reference: https://github.com/paritytech/substrate/issues/14160. - peerset: serde_json::json!( - "Unimplemented. See https://github.com/paritytech/substrate/issues/14160." - ), - } - } - - /// Removes a `PeerId` from the list of reserved peers. - pub fn remove_reserved_peer(&self, peer: PeerId) { - self.service.remove_reserved_peer(peer.into()); - } - - /// Adds a `PeerId` and its `Multiaddr` as reserved. - pub fn add_reserved_peer(&self, peer: MultiaddrWithPeerId) -> Result<(), String> { - self.service.add_reserved_peer(peer) - } -} - -impl NetworkService { - /// Get network state. - /// - /// **Note**: Use this only for debugging. This API is unstable. There are warnings literally - /// everywhere about this. Please don't use this function to retrieve actual information. - /// - /// Returns an error if the `NetworkWorker` is no longer running. - pub async fn network_state(&self) -> Result { - let (tx, rx) = oneshot::channel(); - - let _ = self - .to_worker - .unbounded_send(ServiceToWorkerMsg::NetworkState { pending_response: tx }); - - match rx.await { - Ok(v) => v.map_err(|_| ()), - // The channel can only be closed if the network worker no longer exists. - Err(_) => Err(()), - } - } - - /// Utility function to extract `PeerId` from each `Multiaddr` for peer set updates. - /// - /// Returns an `Err` if one of the given addresses is invalid or contains an - /// invalid peer ID (which includes the local peer ID). - fn split_multiaddr_and_peer_id( - &self, - peers: HashSet, - ) -> Result, String> { - peers - .into_iter() - .map(|mut addr| { - let peer = match addr.pop() { - Some(multiaddr::Protocol::P2p(peer_id)) => peer_id, - _ => return Err("Missing PeerId from address".to_string()), - }; - - // Make sure the local peer ID is never added to the PSM - // or added as a "known address", even if given. - if peer == self.local_peer_id { - Err("Local peer ID in peer set.".to_string()) - } else { - Ok((peer, addr)) - } - }) - .collect::, String>>() - } -} - -impl NetworkStateInfo for NetworkService -where - B: sp_runtime::traits::Block, - H: ExHashT, -{ - /// Returns the local external addresses. - fn external_addresses(&self) -> Vec { - self.external_addresses.lock().iter().cloned().map(Into::into).collect() - } - - /// Returns the listener addresses (without trailing `/p2p/` with our `PeerId`). - fn listen_addresses(&self) -> Vec { - self.listen_addresses.lock().iter().cloned().map(Into::into).collect() - } - - /// Returns the local Peer ID. - fn local_peer_id(&self) -> sc_network_types::PeerId { - self.local_peer_id.into() - } -} - -impl NetworkSigner for NetworkService -where - B: sp_runtime::traits::Block, - H: ExHashT, -{ - fn sign_with_local_identity(&self, msg: Vec) -> Result { - let public_key = self.local_identity.public(); - let bytes = self.local_identity.sign(msg.as_ref())?; - - Ok(Signature { public_key, bytes }) - } - - fn verify( - &self, - peer_id: sc_network_types::PeerId, - public_key: &Vec, - signature: &Vec, - message: &Vec, - ) -> Result { - let public_key = - PublicKey::try_decode_protobuf(public_key).map_err(|error| error.to_string())?; - let peer_id: PeerId = peer_id.into(); - let remote: libp2p::PeerId = public_key.to_peer_id().into(); - - Ok(peer_id == remote && public_key.verify(message, signature)) - } -} - -impl NetworkDHTProvider for NetworkService -where - B: BlockT + 'static, - H: ExHashT, -{ - /// Start finding closest peerst to the target peer ID in the DHT. - /// - /// This will generate either a `ClosestPeersFound` or a `ClosestPeersNotFound` event and pass - /// it as an item on the [`NetworkWorker`] stream. - fn find_closest_peers(&self, target: sc_network_types::PeerId) { - let _ = self - .to_worker - .unbounded_send(ServiceToWorkerMsg::FindClosestPeers(target.into())); - } - - /// Start getting a value from the DHT. - /// - /// This will generate either a `ValueFound` or a `ValueNotFound` event and pass it as an - /// item on the [`NetworkWorker`] stream. - fn get_value(&self, key: &KademliaKey) { - let _ = self.to_worker.unbounded_send(ServiceToWorkerMsg::GetValue(key.clone())); - } - - /// Start putting a value in the DHT. - /// - /// This will generate either a `ValuePut` or a `ValuePutFailed` event and pass it as an - /// item on the [`NetworkWorker`] stream. - fn put_value(&self, key: KademliaKey, value: Vec) { - let _ = self.to_worker.unbounded_send(ServiceToWorkerMsg::PutValue(key, value)); - } - - fn put_record_to( - &self, - record: Record, - peers: HashSet, - update_local_storage: bool, - ) { - let _ = self.to_worker.unbounded_send(ServiceToWorkerMsg::PutRecordTo { - record, - peers, - update_local_storage, - }); - } - - fn store_record( - &self, - key: KademliaKey, - value: Vec, - publisher: Option, - expires: Option, - ) { - let _ = self.to_worker.unbounded_send(ServiceToWorkerMsg::StoreRecord( - key, - value, - publisher.map(Into::into), - expires, - )); - } - - fn start_providing(&self, key: KademliaKey) { - let _ = self.to_worker.unbounded_send(ServiceToWorkerMsg::StartProviding(key)); - } - - fn stop_providing(&self, key: KademliaKey) { - let _ = self.to_worker.unbounded_send(ServiceToWorkerMsg::StopProviding(key)); - } - - fn get_providers(&self, key: KademliaKey) { - let _ = self.to_worker.unbounded_send(ServiceToWorkerMsg::GetProviders(key)); - } -} - -#[async_trait::async_trait] -impl NetworkStatusProvider for NetworkService -where - B: BlockT + 'static, - H: ExHashT, -{ - async fn status(&self) -> Result { - let (tx, rx) = oneshot::channel(); - - let _ = self - .to_worker - .unbounded_send(ServiceToWorkerMsg::NetworkStatus { pending_response: tx }); - - match rx.await { - Ok(v) => v.map_err(|_| ()), - // The channel can only be closed if the network worker no longer exists. - Err(_) => Err(()), - } - } - - async fn network_state(&self) -> Result { - let (tx, rx) = oneshot::channel(); - - let _ = self - .to_worker - .unbounded_send(ServiceToWorkerMsg::NetworkState { pending_response: tx }); - - match rx.await { - Ok(v) => v.map_err(|_| ()), - // The channel can only be closed if the network worker no longer exists. - Err(_) => Err(()), - } - } -} - -#[async_trait::async_trait] -impl NetworkPeers for NetworkService -where - B: BlockT + 'static, - H: ExHashT, -{ - fn set_authorized_peers(&self, peers: HashSet) { - self.sync_protocol_handle - .set_reserved_peers(peers.iter().map(|peer| (*peer).into()).collect()); - } - - fn set_authorized_only(&self, reserved_only: bool) { - self.sync_protocol_handle.set_reserved_only(reserved_only); - } - - fn add_known_address( - &self, - peer_id: sc_network_types::PeerId, - addr: sc_network_types::multiaddr::Multiaddr, - ) { - let _ = self - .to_worker - .unbounded_send(ServiceToWorkerMsg::AddKnownAddress(peer_id.into(), addr.into())); - } - - fn report_peer(&self, peer_id: sc_network_types::PeerId, cost_benefit: ReputationChange) { - self.peer_store_handle.report_peer(peer_id, cost_benefit); - } - - fn peer_reputation(&self, peer_id: &sc_network_types::PeerId) -> i32 { - self.peer_store_handle.peer_reputation(peer_id) - } - - fn disconnect_peer(&self, peer_id: sc_network_types::PeerId, protocol: ProtocolName) { - let _ = self - .to_worker - .unbounded_send(ServiceToWorkerMsg::DisconnectPeer(peer_id.into(), protocol)); - } - - fn accept_unreserved_peers(&self) { - self.sync_protocol_handle.set_reserved_only(false); - } - - fn deny_unreserved_peers(&self) { - self.sync_protocol_handle.set_reserved_only(true); - } - - fn add_reserved_peer(&self, peer: MultiaddrWithPeerId) -> Result<(), String> { - // Make sure the local peer ID is never added as a reserved peer. - if peer.peer_id == self.local_peer_id.into() { - return Err("Local peer ID cannot be added as a reserved peer.".to_string()) - } - - let _ = self.to_worker.unbounded_send(ServiceToWorkerMsg::AddKnownAddress( - peer.peer_id.into(), - peer.multiaddr.into(), - )); - self.sync_protocol_handle.add_reserved_peer(peer.peer_id.into()); - - Ok(()) - } - - fn remove_reserved_peer(&self, peer_id: sc_network_types::PeerId) { - self.sync_protocol_handle.remove_reserved_peer(peer_id.into()); - } - - fn set_reserved_peers( - &self, - protocol: ProtocolName, - peers: HashSet, - ) -> Result<(), String> { - let Some(set_id) = self.notification_protocol_ids.get(&protocol) else { - return Err(format!("Cannot set reserved peers for unknown protocol: {}", protocol)) - }; - - let peers: HashSet = peers.into_iter().map(Into::into).collect(); - let peers_addrs = self.split_multiaddr_and_peer_id(peers)?; - - let mut peers: HashSet = HashSet::with_capacity(peers_addrs.len()); - - for (peer_id, addr) in peers_addrs.into_iter() { - // Make sure the local peer ID is never added to the PSM. - if peer_id == self.local_peer_id { - return Err("Local peer ID cannot be added as a reserved peer.".to_string()) - } - - peers.insert(peer_id.into()); - - if !addr.is_empty() { - let _ = self - .to_worker - .unbounded_send(ServiceToWorkerMsg::AddKnownAddress(peer_id, addr)); - } - } - - self.protocol_handles[usize::from(*set_id)].set_reserved_peers(peers); - - Ok(()) - } - - fn add_peers_to_reserved_set( - &self, - protocol: ProtocolName, - peers: HashSet, - ) -> Result<(), String> { - let Some(set_id) = self.notification_protocol_ids.get(&protocol) else { - return Err(format!( - "Cannot add peers to reserved set of unknown protocol: {}", - protocol - )) - }; - - let peers: HashSet = peers.into_iter().map(Into::into).collect(); - let peers = self.split_multiaddr_and_peer_id(peers)?; - - for (peer_id, addr) in peers.into_iter() { - // Make sure the local peer ID is never added to the PSM. - if peer_id == self.local_peer_id { - return Err("Local peer ID cannot be added as a reserved peer.".to_string()) - } - - if !addr.is_empty() { - let _ = self - .to_worker - .unbounded_send(ServiceToWorkerMsg::AddKnownAddress(peer_id, addr)); - } - - self.protocol_handles[usize::from(*set_id)].add_reserved_peer(peer_id); - } - - Ok(()) - } - - fn remove_peers_from_reserved_set( - &self, - protocol: ProtocolName, - peers: Vec, - ) -> Result<(), String> { - let Some(set_id) = self.notification_protocol_ids.get(&protocol) else { - return Err(format!( - "Cannot remove peers from reserved set of unknown protocol: {}", - protocol - )) - }; - - for peer_id in peers.into_iter() { - self.protocol_handles[usize::from(*set_id)].remove_reserved_peer(peer_id.into()); - } - - Ok(()) - } - - fn sync_num_connected(&self) -> usize { - self.num_connected.load(Ordering::Relaxed) - } - - fn peer_role( - &self, - peer_id: sc_network_types::PeerId, - handshake: Vec, - ) -> Option { - match Roles::decode_all(&mut &handshake[..]) { - Ok(role) => Some(role.into()), - Err(_) => { - log::debug!(target: LOG_TARGET, "handshake doesn't contain peer role: {handshake:?}"); - self.peer_store_handle.peer_role(&(peer_id.into())) - }, - } - } - - /// Get the list of reserved peers. - /// - /// Returns an error if the `NetworkWorker` is no longer running. - async fn reserved_peers(&self) -> Result, ()> { - let (tx, rx) = oneshot::channel(); - - self.sync_protocol_handle.reserved_peers(tx); - - // The channel can only be closed if `ProtocolController` no longer exists. - rx.await - .map(|peers| peers.into_iter().map(From::from).collect()) - .map_err(|_| ()) - } -} - -impl NetworkEventStream for NetworkService -where - B: BlockT + 'static, - H: ExHashT, -{ - fn event_stream(&self, name: &'static str) -> Pin + Send>> { - let (tx, rx) = out_events::channel(name, 100_000); - let _ = self.to_worker.unbounded_send(ServiceToWorkerMsg::EventStream(tx)); - Box::pin(rx) - } -} - -#[async_trait::async_trait] -impl NetworkRequest for NetworkService -where - B: BlockT + 'static, - H: ExHashT, -{ - async fn request( - &self, - target: sc_network_types::PeerId, - protocol: ProtocolName, - request: Vec, - fallback_request: Option<(Vec, ProtocolName)>, - connect: IfDisconnected, - ) -> Result<(Vec, ProtocolName), RequestFailure> { - let (tx, rx) = oneshot::channel(); - - self.start_request(target.into(), protocol, request, fallback_request, tx, connect); - - match rx.await { - Ok(v) => v, - // The channel can only be closed if the network worker no longer exists. If the - // network worker no longer exists, then all connections to `target` are necessarily - // closed, and we legitimately report this situation as a "ConnectionClosed". - Err(_) => Err(RequestFailure::Network(OutboundFailure::ConnectionClosed)), - } - } - - fn start_request( - &self, - target: sc_network_types::PeerId, - protocol: ProtocolName, - request: Vec, - fallback_request: Option<(Vec, ProtocolName)>, - tx: oneshot::Sender, ProtocolName), RequestFailure>>, - connect: IfDisconnected, - ) { - let _ = self.to_worker.unbounded_send(ServiceToWorkerMsg::Request { - target: target.into(), - protocol: protocol.into(), - request, - fallback_request, - pending_response: tx, - connect, - }); - } -} - -/// A `NotificationSender` allows for sending notifications to a peer with a chosen protocol. -#[must_use] -pub struct NotificationSender { - sink: NotificationsSink, - - /// Name of the protocol on the wire. - protocol_name: ProtocolName, - - /// Field extracted from the [`Metrics`] struct and necessary to report the - /// notifications-related metrics. - notification_size_metric: Option, -} - -#[async_trait::async_trait] -impl NotificationSenderT for NotificationSender { - async fn ready( - &self, - ) -> Result, NotificationSenderError> { - Ok(Box::new(NotificationSenderReady { - ready: match self.sink.reserve_notification().await { - Ok(r) => Some(r), - Err(()) => return Err(NotificationSenderError::Closed), - }, - peer_id: self.sink.peer_id(), - protocol_name: &self.protocol_name, - notification_size_metric: self.notification_size_metric.clone(), - })) - } -} - -/// Reserved slot in the notifications buffer, ready to accept data. -#[must_use] -pub struct NotificationSenderReady<'a> { - ready: Option>, - - /// Target of the notification. - peer_id: &'a PeerId, - - /// Name of the protocol on the wire. - protocol_name: &'a ProtocolName, - - /// Field extracted from the [`Metrics`] struct and necessary to report the - /// notifications-related metrics. - notification_size_metric: Option, -} - -impl<'a> NotificationSenderReadyT for NotificationSenderReady<'a> { - fn send(&mut self, notification: Vec) -> Result<(), NotificationSenderError> { - if let Some(notification_size_metric) = &self.notification_size_metric { - notification_size_metric.observe(notification.len() as f64); - } - - trace!( - target: LOG_TARGET, - "External API => Notification({:?}, {}, {} bytes)", - self.peer_id, self.protocol_name, notification.len(), - ); - trace!(target: LOG_TARGET, "Handler({:?}) <= Async notification", self.peer_id); - - self.ready - .take() - .ok_or(NotificationSenderError::Closed)? - .send(notification) - .map_err(|()| NotificationSenderError::Closed) - } -} - -/// Messages sent from the `NetworkService` to the `NetworkWorker`. -/// -/// Each entry corresponds to a method of `NetworkService`. -enum ServiceToWorkerMsg { - FindClosestPeers(PeerId), - GetValue(KademliaKey), - PutValue(KademliaKey, Vec), - PutRecordTo { - record: Record, - peers: HashSet, - update_local_storage: bool, - }, - StoreRecord(KademliaKey, Vec, Option, Option), - StartProviding(KademliaKey), - StopProviding(KademliaKey), - GetProviders(KademliaKey), - AddKnownAddress(PeerId, Multiaddr), - EventStream(out_events::Sender), - Request { - target: PeerId, - protocol: ProtocolName, - request: Vec, - fallback_request: Option<(Vec, ProtocolName)>, - pending_response: oneshot::Sender, ProtocolName), RequestFailure>>, - connect: IfDisconnected, - }, - NetworkStatus { - pending_response: oneshot::Sender>, - }, - NetworkState { - pending_response: oneshot::Sender>, - }, - DisconnectPeer(PeerId, ProtocolName), -} - -/// Filters peer addresses: only ports 30333-30533, no link-local; two-tier (strict then relaxed). -fn filter_peer_addresses(addrs: Vec, peer_id: &PeerId) -> Vec { - use multiaddr::Protocol; - - let original_count = addrs.len(); - let (strict_filtered, relaxed_filtered): (Vec<_>, Vec<_>) = - addrs - .into_iter() - .fold((Vec::new(), Vec::new()), |(mut strict, mut relaxed), addr| { - let mut has_valid_port = false; - let mut is_link_local = false; - let mut is_public = true; - - for proto in addr.iter() { - match proto { - Protocol::Tcp(port) => { - has_valid_port = port >= MIN_P2P_PORT && port <= MAX_P2P_PORT; - }, - Protocol::Ip6(ip) if ip.segments()[0] == 0xfe80 => { - is_link_local = true; - }, - Protocol::Ip4(ip) if ip.is_loopback() || ip.is_private() => { - is_public = false; - }, - _ => {}, - } - } - - let relaxed_ok = has_valid_port && !is_link_local; - let strict_ok = relaxed_ok && is_public; - - if strict_ok { - strict.push(addr.clone()); - } - if relaxed_ok { - relaxed.push(addr); - } - - (strict, relaxed) - }); - - if !strict_filtered.is_empty() { - return strict_filtered - } - if !relaxed_filtered.is_empty() && relaxed_filtered.len() < original_count { - info!( - target: LOG_TARGET, - "Peer {:?}: filtered {} -> {} addresses (relaxed mode)", - peer_id, original_count, relaxed_filtered.len() - ); - } - relaxed_filtered -} - -/// Main network worker. Must be polled in order for the network to advance. -/// -/// You are encouraged to poll this in a separate background thread or task. -#[must_use = "The NetworkWorker must be polled in order for the network to advance"] -pub struct NetworkWorker -where - B: BlockT + 'static, - H: ExHashT, -{ - /// Updated by the `NetworkWorker` and loaded by the `NetworkService`. - listen_addresses: Arc>>, - /// Updated by the `NetworkWorker` and loaded by the `NetworkService`. - num_connected: Arc, - /// The network service that can be extracted and shared through the codebase. - service: Arc>, - /// The *actual* network. - network_service: Swarm>, - /// Messages from the [`NetworkService`] that must be processed. - from_service: TracingUnboundedReceiver, - /// Senders for events that happen on the network. - event_streams: out_events::OutChannels, - /// Prometheus network metrics. - metrics: Option, - /// The `PeerId`'s of all boot nodes mapped to the registered addresses. - boot_node_ids: Arc>>, - /// Boot nodes that we already have reported as invalid. - reported_invalid_boot_nodes: HashSet, - /// Peer reputation store handle. - peer_store_handle: Arc, - /// Notification protocol handles. - notif_protocol_handles: Vec, - /// Marker to pin the `H` generic. Serves no purpose except to not break backwards - /// compatibility. - _marker: PhantomData, - /// Marker for block type - _block: PhantomData, - /// When false, filter peer addresses (ports 30333-30533, no link-local, strict/relaxed). - disable_peer_address_filtering: bool, -} - -impl NetworkWorker -where - B: BlockT + 'static, - H: ExHashT, -{ - /// Run the network. - pub async fn run(mut self) { - while self.next_action().await {} - } - - /// Perform one action on the network. - /// - /// Returns `false` when the worker should be shutdown. - /// Use in tests only. - pub async fn next_action(&mut self) -> bool { - futures::select! { - // Next message from the service. - msg = self.from_service.next() => { - if let Some(msg) = msg { - self.handle_worker_message(msg); - } else { - return false - } - }, - // Next event from `Swarm` (the stream guaranteed to never terminate). - event = self.network_service.select_next_some() => { - self.handle_swarm_event(event); - }, - }; - - // Update the `num_connected` count shared with the `NetworkService`. - let num_connected_peers = self.network_service.behaviour().user_protocol().num_sync_peers(); - self.num_connected.store(num_connected_peers, Ordering::Relaxed); - - if let Some(metrics) = self.metrics.as_ref() { - if let Some(buckets) = self.network_service.behaviour_mut().num_entries_per_kbucket() { - for (lower_ilog2_bucket_bound, num_entries) in buckets { - metrics - .kbuckets_num_nodes - .with_label_values(&[&lower_ilog2_bucket_bound.to_string()]) - .set(num_entries as u64); - } - } - if let Some(num_entries) = self.network_service.behaviour_mut().num_kademlia_records() { - metrics.kademlia_records_count.set(num_entries as u64); - } - if let Some(num_entries) = - self.network_service.behaviour_mut().kademlia_records_total_size() - { - metrics.kademlia_records_sizes_total.set(num_entries as u64); - } - - metrics.pending_connections.set( - Swarm::network_info(&self.network_service).connection_counters().num_pending() - as u64, - ); - } - - true - } - - /// Process the next message coming from the `NetworkService`. - fn handle_worker_message(&mut self, msg: ServiceToWorkerMsg) { - match msg { - ServiceToWorkerMsg::FindClosestPeers(target) => - self.network_service.behaviour_mut().find_closest_peers(target), - ServiceToWorkerMsg::GetValue(key) => - self.network_service.behaviour_mut().get_value(key.into()), - ServiceToWorkerMsg::PutValue(key, value) => - self.network_service.behaviour_mut().put_value(key.into(), value), - ServiceToWorkerMsg::PutRecordTo { record, peers, update_local_storage } => self - .network_service - .behaviour_mut() - .put_record_to(record.into(), peers, update_local_storage), - ServiceToWorkerMsg::StoreRecord(key, value, publisher, expires) => self - .network_service - .behaviour_mut() - .store_record(key.into(), value, publisher, expires), - ServiceToWorkerMsg::StartProviding(key) => - self.network_service.behaviour_mut().start_providing(key.into()), - ServiceToWorkerMsg::StopProviding(key) => - self.network_service.behaviour_mut().stop_providing(&key.into()), - ServiceToWorkerMsg::GetProviders(key) => - self.network_service.behaviour_mut().get_providers(key.into()), - ServiceToWorkerMsg::AddKnownAddress(peer_id, addr) => - self.network_service.behaviour_mut().add_known_address(peer_id, addr), - ServiceToWorkerMsg::EventStream(sender) => self.event_streams.push(sender), - ServiceToWorkerMsg::Request { - target, - protocol, - request, - fallback_request, - pending_response, - connect, - } => { - self.network_service.behaviour_mut().send_request( - &target, - protocol, - request, - fallback_request, - pending_response, - connect, - ); - }, - ServiceToWorkerMsg::NetworkStatus { pending_response } => { - let _ = pending_response.send(Ok(self.status())); - }, - ServiceToWorkerMsg::NetworkState { pending_response } => { - let _ = pending_response.send(Ok(self.network_state())); - }, - ServiceToWorkerMsg::DisconnectPeer(who, protocol_name) => self - .network_service - .behaviour_mut() - .user_protocol_mut() - .disconnect_peer(&who, protocol_name), - } - } - - /// Process the next event coming from `Swarm`. - fn handle_swarm_event(&mut self, event: SwarmEvent) { - match event { - SwarmEvent::Behaviour(BehaviourOut::InboundRequest { protocol, result, .. }) => { - if let Some(metrics) = self.metrics.as_ref() { - match result { - Ok(serve_time) => { - metrics - .requests_in_success_total - .with_label_values(&[&protocol]) - .observe(serve_time.as_secs_f64()); - }, - Err(err) => { - let reason = match err { - ResponseFailure::Network(InboundFailure::Timeout) => - Some("timeout"), - ResponseFailure::Network(InboundFailure::UnsupportedProtocols) => - // `UnsupportedProtocols` is reported for every single - // inbound request whenever a request with an unsupported - // protocol is received. This is not reported in order to - // avoid confusions. - None, - ResponseFailure::Network(InboundFailure::ResponseOmission) => - Some("busy-omitted"), - ResponseFailure::Network(InboundFailure::ConnectionClosed) => - Some("connection-closed"), - ResponseFailure::Network(InboundFailure::Io(_)) => Some("io"), - }; - - if let Some(reason) = reason { - metrics - .requests_in_failure_total - .with_label_values(&[&protocol, reason]) - .inc(); - } - }, - } - } - }, - SwarmEvent::Behaviour(BehaviourOut::RequestFinished { - protocol, - duration, - result, - .. - }) => - if let Some(metrics) = self.metrics.as_ref() { - match result { - Ok(_) => { - metrics - .requests_out_success_total - .with_label_values(&[&protocol]) - .observe(duration.as_secs_f64()); - }, - Err(err) => { - let reason = match err { - RequestFailure::NotConnected => "not-connected", - RequestFailure::UnknownProtocol => "unknown-protocol", - RequestFailure::Refused => "refused", - RequestFailure::Obsolete => "obsolete", - RequestFailure::Network(OutboundFailure::DialFailure) => - "dial-failure", - RequestFailure::Network(OutboundFailure::Timeout) => "timeout", - RequestFailure::Network(OutboundFailure::ConnectionClosed) => - "connection-closed", - RequestFailure::Network(OutboundFailure::UnsupportedProtocols) => - "unsupported", - RequestFailure::Network(OutboundFailure::Io(_)) => "io", - }; - - metrics - .requests_out_failure_total - .with_label_values(&[&protocol, reason]) - .inc(); - }, - } - }, - SwarmEvent::Behaviour(BehaviourOut::ReputationChanges { peer, changes }) => { - for change in changes { - self.peer_store_handle.report_peer(peer.into(), change); - } - }, - SwarmEvent::Behaviour(BehaviourOut::PeerIdentify { - peer_id, - info: - IdentifyInfo { - protocol_version, agent_version, mut listen_addrs, protocols, .. - }, - }) => { - if !self.disable_peer_address_filtering { - listen_addrs = filter_peer_addresses(listen_addrs, &peer_id); - } - if listen_addrs.len() > 30 { - debug!( - target: LOG_TARGET, - "Node {:?} has reported more than 30 addresses; it is identified by {:?} and {:?}", - peer_id, protocol_version, agent_version - ); - listen_addrs.truncate(30); - } - for addr in listen_addrs { - self.network_service.behaviour_mut().add_self_reported_address_to_dht( - &peer_id, - &protocols, - addr.clone(), - ); - } - self.peer_store_handle.add_known_peer(peer_id.into()); - }, - SwarmEvent::Behaviour(BehaviourOut::Discovered(peer_id)) => { - self.peer_store_handle.add_known_peer(peer_id.into()); - }, - SwarmEvent::Behaviour(BehaviourOut::RandomKademliaStarted) => { - if let Some(metrics) = self.metrics.as_ref() { - metrics.kademlia_random_queries_total.inc(); - } - }, - SwarmEvent::Behaviour(BehaviourOut::NotificationStreamOpened { - remote, - set_id, - direction, - negotiated_fallback, - notifications_sink, - received_handshake, - }) => { - let _ = self.notif_protocol_handles[usize::from(set_id)].report_substream_opened( - remote, - direction, - received_handshake, - negotiated_fallback, - notifications_sink, - ); - }, - SwarmEvent::Behaviour(BehaviourOut::NotificationStreamReplaced { - remote, - set_id, - notifications_sink, - }) => { - let _ = self.notif_protocol_handles[usize::from(set_id)] - .report_notification_sink_replaced(remote, notifications_sink); - - // TODO: Notifications might have been lost as a result of the previous - // connection being dropped, and as a result it would be preferable to notify - // the users of this fact by simulating the substream being closed then - // reopened. - // The code below doesn't compile because `role` is unknown. Propagating the - // handshake of the secondary connections is quite an invasive change and - // would conflict with https://github.com/paritytech/substrate/issues/6403. - // Considering that dropping notifications is generally regarded as - // acceptable, this bug is at the moment intentionally left there and is - // intended to be fixed at the same time as - // https://github.com/paritytech/substrate/issues/6403. - // self.event_streams.send(Event::NotificationStreamClosed { - // remote, - // protocol, - // }); - // self.event_streams.send(Event::NotificationStreamOpened { - // remote, - // protocol, - // role, - // }); - }, - SwarmEvent::Behaviour(BehaviourOut::NotificationStreamClosed { remote, set_id }) => { - let _ = self.notif_protocol_handles[usize::from(set_id)] - .report_substream_closed(remote); - }, - SwarmEvent::Behaviour(BehaviourOut::NotificationsReceived { - remote, - set_id, - notification, - }) => { - let _ = self.notif_protocol_handles[usize::from(set_id)] - .report_notification_received(remote, notification); - }, - SwarmEvent::Behaviour(BehaviourOut::Dht(event, duration)) => { - match (self.metrics.as_ref(), duration) { - (Some(metrics), Some(duration)) => { - let query_type = match event { - DhtEvent::ClosestPeersFound(_, _) => "peers-found", - DhtEvent::ClosestPeersNotFound(_) => "peers-not-found", - DhtEvent::ValueFound(_) => "value-found", - DhtEvent::ValueNotFound(_) => "value-not-found", - DhtEvent::ValuePut(_) => "value-put", - DhtEvent::ValuePutFailed(_) => "value-put-failed", - DhtEvent::PutRecordRequest(_, _, _, _) => "put-record-request", - DhtEvent::StartedProviding(_) => "started-providing", - DhtEvent::StartProvidingFailed(_) => "start-providing-failed", - DhtEvent::ProvidersFound(_, _) => "providers-found", - DhtEvent::NoMoreProviders(_) => "no-more-providers", - DhtEvent::ProvidersNotFound(_) => "providers-not-found", - }; - metrics - .kademlia_query_duration - .with_label_values(&[query_type]) - .observe(duration.as_secs_f64()); - }, - _ => {}, - } - - self.event_streams.send(Event::Dht(event)); - }, - SwarmEvent::Behaviour(BehaviourOut::None) => { - // Ignored event from lower layers. - }, - SwarmEvent::ConnectionEstablished { - peer_id, - endpoint, - num_established, - concurrent_dial_errors, - .. - } => { - if let Some(errors) = concurrent_dial_errors { - debug!(target: LOG_TARGET, "Libp2p => Connected({:?}) with errors: {:?}", peer_id, errors); - } else { - debug!(target: LOG_TARGET, "Libp2p => Connected({:?})", peer_id); - } - - if let Some(metrics) = self.metrics.as_ref() { - let direction = match endpoint { - ConnectedPoint::Dialer { .. } => "out", - ConnectedPoint::Listener { .. } => "in", - }; - metrics.connections_opened_total.with_label_values(&[direction]).inc(); - - if num_established.get() == 1 { - metrics.distinct_peers_connections_opened_total.inc(); - } - } - }, - SwarmEvent::ConnectionClosed { - connection_id, - peer_id, - cause, - endpoint, - num_established, - } => { - debug!(target: LOG_TARGET, "Libp2p => Disconnected({peer_id:?} via {connection_id:?}, {cause:?})"); - if let Some(metrics) = self.metrics.as_ref() { - let direction = match endpoint { - ConnectedPoint::Dialer { .. } => "out", - ConnectedPoint::Listener { .. } => "in", - }; - let reason = match cause { - Some(ConnectionError::IO(_)) => "transport-error", - Some(ConnectionError::KeepAliveTimeout) => "keep-alive-timeout", - None => "actively-closed", - }; - metrics.connections_closed_total.with_label_values(&[direction, reason]).inc(); - - // `num_established` represents the number of *remaining* connections. - if num_established == 0 { - metrics.distinct_peers_connections_closed_total.inc(); - } - } - }, - SwarmEvent::NewListenAddr { address, .. } => { - trace!(target: LOG_TARGET, "Libp2p => NewListenAddr({})", address); - if let Some(metrics) = self.metrics.as_ref() { - metrics.listeners_local_addresses.inc(); - } - self.listen_addresses.lock().insert(address.clone()); - }, - SwarmEvent::ExpiredListenAddr { address, .. } => { - info!(target: LOG_TARGET, "📪 No longer listening on {}", address); - if let Some(metrics) = self.metrics.as_ref() { - metrics.listeners_local_addresses.dec(); - } - self.listen_addresses.lock().remove(&address); - }, - SwarmEvent::OutgoingConnectionError { connection_id, peer_id, error } => { - if let Some(peer_id) = peer_id { - trace!( - target: LOG_TARGET, - "Libp2p => Failed to reach {peer_id:?} via {connection_id:?}: {error}", - ); - - let not_reported = !self.reported_invalid_boot_nodes.contains(&peer_id); - - if let Some(addresses) = - not_reported.then(|| self.boot_node_ids.get(&peer_id)).flatten() - { - if let DialError::WrongPeerId { obtained, endpoint } = &error { - if let ConnectedPoint::Dialer { - address, - role_override: _, - port_use: _, - } = endpoint - { - let address_without_peer_id = parse_addr(address.clone().into()) - .map_or_else(|_| address.clone(), |r| r.1.into()); - - // Only report for address of boot node that was added at startup of - // the node and not for any address that the node learned of the - // boot node. - if addresses.iter().any(|a| address_without_peer_id == *a) { - warn!( - "💔 The bootnode you want to connect to at `{address}` provided a \ - different peer ID `{obtained}` than the one you expect `{peer_id}`.", - ); - - self.reported_invalid_boot_nodes.insert(peer_id); - } - } - } - } - } - - if let Some(metrics) = self.metrics.as_ref() { - let reason = match error { - DialError::Denied { cause } => - if cause.downcast::().is_ok() { - Some("limit-reached") - } else { - None - }, - DialError::LocalPeerId { .. } => Some("local-peer-id"), - DialError::WrongPeerId { .. } => Some("invalid-peer-id"), - DialError::Transport(_) => Some("transport-error"), - DialError::NoAddresses | - DialError::DialPeerConditionFalse(_) | - DialError::Aborted => None, // ignore them - }; - if let Some(reason) = reason { - metrics.pending_connections_errors_total.with_label_values(&[reason]).inc(); - } - } - }, - SwarmEvent::Dialing { connection_id, peer_id } => { - trace!(target: LOG_TARGET, "Libp2p => Dialing({peer_id:?}) via {connection_id:?}") - }, - SwarmEvent::IncomingConnection { connection_id, local_addr, send_back_addr } => { - trace!(target: LOG_TARGET, "Libp2p => IncomingConnection({local_addr},{send_back_addr} via {connection_id:?}))"); - if let Some(metrics) = self.metrics.as_ref() { - metrics.incoming_connections_total.inc(); - } - }, - SwarmEvent::IncomingConnectionError { - connection_id, - local_addr, - send_back_addr, - error, - } => { - debug!( - target: LOG_TARGET, - "Libp2p => IncomingConnectionError({local_addr},{send_back_addr} via {connection_id:?}): {error}" - ); - if let Some(metrics) = self.metrics.as_ref() { - let reason = match error { - ListenError::Denied { cause } => - if cause.downcast::().is_ok() { - Some("limit-reached") - } else { - None - }, - ListenError::WrongPeerId { .. } | ListenError::LocalPeerId { .. } => - Some("invalid-peer-id"), - ListenError::Transport(_) => Some("transport-error"), - ListenError::Aborted => None, // ignore it - }; - - if let Some(reason) = reason { - metrics - .incoming_connections_errors_total - .with_label_values(&[reason]) - .inc(); - } - } - }, - SwarmEvent::ListenerClosed { reason, addresses, .. } => { - if let Some(metrics) = self.metrics.as_ref() { - metrics.listeners_local_addresses.sub(addresses.len() as u64); - } - let mut listen_addresses = self.listen_addresses.lock(); - for addr in &addresses { - listen_addresses.remove(addr); - } - drop(listen_addresses); - - let addrs = - addresses.into_iter().map(|a| a.to_string()).collect::>().join(", "); - match reason { - Ok(()) => error!( - target: LOG_TARGET, - "📪 Libp2p listener ({}) closed gracefully", - addrs - ), - Err(e) => error!( - target: LOG_TARGET, - "📪 Libp2p listener ({}) closed: {}", - addrs, e - ), - } - }, - SwarmEvent::ListenerError { error, .. } => { - debug!(target: LOG_TARGET, "Libp2p => ListenerError: {}", error); - if let Some(metrics) = self.metrics.as_ref() { - metrics.listeners_errors_total.inc(); - } - }, - SwarmEvent::NewExternalAddrCandidate { address } => { - trace!(target: LOG_TARGET, "Libp2p => NewExternalAddrCandidate: {address:?}"); - }, - SwarmEvent::ExternalAddrConfirmed { address } => { - trace!(target: LOG_TARGET, "Libp2p => ExternalAddrConfirmed: {address:?}"); - }, - SwarmEvent::ExternalAddrExpired { address } => { - trace!(target: LOG_TARGET, "Libp2p => ExternalAddrExpired: {address:?}"); - }, - SwarmEvent::NewExternalAddrOfPeer { peer_id, address } => { - trace!(target: LOG_TARGET, "Libp2p => NewExternalAddrOfPeer({peer_id:?}): {address:?}") - }, - event => { - warn!(target: LOG_TARGET, "New unknown SwarmEvent libp2p event: {event:?}"); - }, - } - } -} - -impl Unpin for NetworkWorker -where - B: BlockT + 'static, - H: ExHashT, -{ -} - -pub(crate) fn ensure_addresses_consistent_with_transport<'a>( - addresses: impl Iterator, - transport: &TransportConfig, -) -> Result<(), Error> { - use sc_network_types::multiaddr::Protocol; - - if matches!(transport, TransportConfig::MemoryOnly) { - let addresses: Vec<_> = addresses - .filter(|x| x.iter().any(|y| !matches!(y, Protocol::Memory(_)))) - .cloned() - .collect(); - - if !addresses.is_empty() { - return Err(Error::AddressesForAnotherTransport { - transport: transport.clone(), - addresses, - }) - } - } else { - let addresses: Vec<_> = addresses - .filter(|x| x.iter().any(|y| matches!(y, Protocol::Memory(_)))) - .cloned() - .collect(); - - if !addresses.is_empty() { - return Err(Error::AddressesForAnotherTransport { - transport: transport.clone(), - addresses, - }) - } - } +// Re-export PeerStoreProvider from peer_store +pub use crate::peer_store::PeerStoreProvider; +// Re-export NotificationMetrics +pub use metrics::NotificationMetrics; - Ok(()) +/// Utility function to ensure addresses are consistent with transport configuration. +/// All addresses should be the same "family" (TCP or WebSocket). +pub fn ensure_addresses_consistent_with_transport<'a>( + addresses: impl Iterator, + _transport: &crate::config::TransportConfig, +) -> Result, crate::error::Error> { + // For litep2p, we just collect the addresses without strict libp2p-style validation + // The litep2p backend handles address validation internally + Ok(addresses.cloned().collect()) } diff --git a/client/network/src/service/signature.rs b/client/network/src/service/signature.rs index 22c06b76..75694f73 100644 --- a/client/network/src/service/signature.rs +++ b/client/network/src/service/signature.rs @@ -1,6 +1,7 @@ // This file is part of Substrate. // // Copyright (C) Parity Technologies (UK) Ltd. +// Copyright (C) Quantus Network Developers // SPDX-License-Identifier: GPL-3.0-or-later WITH Classpath-exception-2.0 // // This program is free software: you can redistribute it and/or modify @@ -18,82 +19,122 @@ // // If you read this, you are very thorough, congratulations. -//! Signature-related code +//! Signature-related code for litep2p network backend. -pub use libp2p::identity::{DecodingError, SigningError}; +use litep2p::crypto::{ + PublicKey as Litep2pPublicKey, + dilithium::Keypair as DilithiumKeypair, +}; -/// Public key (libp2p-identity, supports Dilithium via feature). -pub enum PublicKey { - /// Libp2p public key (ed25519 or Dilithium from libp2p-identity). - Libp2p(libp2p::identity::PublicKey), - /// Litep2p public key (Dilithium only in this fork). - Litep2p(litep2p::crypto::PublicKey), +/// Error during signing of a message. +#[derive(Debug, thiserror::Error)] +pub enum SigningError { + #[error("Signing failed")] + SigningFailed, } +/// Error during decoding of key material. +#[derive(Debug, thiserror::Error)] +pub enum DecodingError { + #[error("Invalid key data")] + InvalidKey, + #[error("Unknown key type")] + UnknownKeyType, +} + +/// Public key (litep2p, supports Dilithium). +pub struct PublicKey(Litep2pPublicKey); + impl PublicKey { /// Protobuf-encode [`PublicKey`]. pub fn encode_protobuf(&self) -> Vec { - match self { - Self::Libp2p(public) => public.encode_protobuf(), - Self::Litep2p(public) => public.to_protobuf_encoding(), - } + self.0.to_protobuf_encoding() } /// Get `PeerId` of the [`PublicKey`]. pub fn to_peer_id(&self) -> sc_network_types::PeerId { - match self { - Self::Libp2p(public) => public.to_peer_id().into(), - Self::Litep2p(public) => { - let litep2p_peer_id: litep2p::PeerId = public.to_peer_id(); - litep2p_peer_id.into() - }, - } + let litep2p_peer_id: litep2p::PeerId = self.0.to_peer_id(); + litep2p_peer_id.into() } /// Try to decode public key from protobuf. - pub fn try_decode_protobuf(bytes: &[u8]) -> Result { - libp2p::identity::PublicKey::try_decode_protobuf(bytes).map(PublicKey::Libp2p) + pub fn try_decode_protobuf(bytes: &[u8]) -> Result { + Litep2pPublicKey::from_protobuf_encoding(bytes) + .map(PublicKey) + .map_err(|_| DecodingError::InvalidKey) } /// Verify a signature. pub fn verify(&self, msg: &[u8], sig: &[u8]) -> bool { - match self { - Self::Libp2p(public) => public.verify(msg, sig), - Self::Litep2p(public) => public.verify(msg, sig), - } + self.0.verify(msg, sig) + } +} + +impl From for PublicKey { + fn from(key: Litep2pPublicKey) -> Self { + PublicKey(key) } } -/// Keypair (libp2p-identity, supports Dilithium via feature). +/// Keypair (litep2p, supports Dilithium). pub enum Keypair { - /// Libp2p keypair (ed25519 or Dilithium from libp2p-identity). - Libp2p(libp2p::identity::Keypair), + /// Dilithium keypair (post-quantum). + Dilithium(DilithiumKeypair), } impl Keypair { - /// Generate ed25519 keypair. + /// Generate ed25519 keypair (stub for API compatibility, but we use Dilithium). + #[deprecated(note = "This network uses Dilithium. Use generate_dilithium() instead.")] pub fn generate_ed25519() -> Self { - Keypair::Libp2p(libp2p::identity::Keypair::generate_ed25519()) + // For API compatibility, generate a Dilithium keypair instead + Self::generate_dilithium() + } + + /// Generate Dilithium keypair (post-quantum). + pub fn generate_dilithium() -> Self { + Keypair::Dilithium(DilithiumKeypair::generate()) } /// Get [`Keypair`]'s public key. pub fn public(&self) -> PublicKey { match self { - Keypair::Libp2p(keypair) => PublicKey::Libp2p(keypair.public()), + Keypair::Dilithium(kp) => PublicKey(Litep2pPublicKey::from(kp.public().clone())), } } /// Sign a message. pub fn sign(&self, msg: &[u8]) -> Result, SigningError> { match self { - Keypair::Libp2p(keypair) => keypair.sign(msg), + Keypair::Dilithium(kp) => Ok(kp.sign(msg)), } } - /// Encode the secret key (for comparison in tests / CLI). + /// Get the secret key bytes. pub fn secret(&self) -> Option> { match self { - Keypair::Libp2p(keypair) => keypair.secret(), + Keypair::Dilithium(kp) => Some(kp.to_bytes()), + } + } + + /// Get the Dilithium secret bytes (for serialization). + pub fn dilithium_to_bytes(&self) -> Vec { + match self { + Keypair::Dilithium(kp) => kp.to_bytes(), + } + } + + /// Create a Dilithium keypair from bytes. + pub fn dilithium_from_bytes(bytes: &[u8]) -> Result { + let mut bytes_mut = bytes.to_vec(); + DilithiumKeypair::try_from_bytes(&mut bytes_mut) + .map(Keypair::Dilithium) + .map_err(|_| DecodingError::InvalidKey) + } + + /// Convert to litep2p keypair for the network backend. + pub fn to_litep2p_keypair(&self) -> litep2p::crypto::Keypair { + match self { + Keypair::Dilithium(kp) => litep2p::crypto::Keypair::from(kp.clone()), } } } @@ -120,13 +161,8 @@ impl Signature { message: impl AsRef<[u8]>, keypair: &Keypair, ) -> Result { - match keypair { - Keypair::Libp2p(keypair) => { - let public_key = keypair.public(); - let bytes = keypair.sign(message.as_ref())?; - - Ok(Signature { public_key: PublicKey::Libp2p(public_key), bytes }) - }, - } + let public_key = keypair.public(); + let bytes = keypair.sign(message.as_ref())?; + Ok(Signature { public_key, bytes }) } } diff --git a/client/network/src/service/traits.rs b/client/network/src/service/traits.rs index 0bf378d6..d8d7bc17 100644 --- a/client/network/src/service/traits.rs +++ b/client/network/src/service/traits.rs @@ -21,11 +21,11 @@ //! Traits defined by `sc-network`. use crate::{ - config::{IncomingRequest, MultiaddrWithPeerId, NotificationHandshake, Params, SetConfig}, + config::{MultiaddrWithPeerId, NotificationHandshake, Params, SetConfig}, error::{self, Error}, event::Event, + litep2p::shim::request_response::IncomingRequest, network_state::NetworkState, - request_responses::{IfDisconnected, RequestFailure}, service::{metrics::NotificationMetrics, signature::Signature, PeerStoreProvider}, types::ProtocolName, ReputationChange, @@ -52,7 +52,61 @@ use std::{ time::{Duration, Instant}, }; -pub use libp2p::identity::SigningError; +pub use crate::service::signature::SigningError; + +/// Possible failures occurring in the context of sending an outbound request. +#[derive(Debug, Clone)] +pub enum OutboundFailure { + /// The request could not be sent because a dialing attempt failed. + DialFailure, + /// The request timed out before a response was received. + Timeout, + /// The connection closed before a response was received. + ConnectionClosed, + /// The remote supports none of the requested protocols. + UnsupportedProtocols, + /// An IO failure happened on an outbound stream. + Io(Arc), +} + +impl PartialEq for OutboundFailure { + fn eq(&self, other: &Self) -> bool { + match (self, other) { + (Self::DialFailure, Self::DialFailure) => true, + (Self::Timeout, Self::Timeout) => true, + (Self::ConnectionClosed, Self::ConnectionClosed) => true, + (Self::UnsupportedProtocols, Self::UnsupportedProtocols) => true, + (Self::Io(_), Self::Io(_)) => true, // Compare by variant only for Io + _ => false, + } + } +} + +impl Eq for OutboundFailure {} + +/// Request failure type - represents why a request failed. +#[derive(Debug, Clone, PartialEq, Eq)] +pub enum RequestFailure { + /// The peer is not connected. + NotConnected, + /// The protocol is not registered. + UnknownProtocol, + /// The remote refused the request. + Refused, + /// The response is no longer needed. + Obsolete, + /// Network-level failure. + Network(OutboundFailure), +} + +/// If disconnected - describes what happens when trying to send to a disconnected peer. +#[derive(Debug, Copy, Clone, PartialEq, Eq, Hash)] +pub enum IfDisconnected { + /// Try to connect before sending. + TryConnect, + /// Don't try to connect, just fail immediately. + ImmediateError, +} /// Supertrait defining the services provided by [`NetworkBackend`] service handle. pub trait NetworkService: diff --git a/node/src/command.rs b/node/src/command.rs index bb766214..7e74a9c0 100644 --- a/node/src/command.rs +++ b/node/src/command.rs @@ -18,7 +18,7 @@ use quantus_runtime::Block; use quantus_runtime::EXISTENTIAL_DEPOSIT; use rand::Rng; use sc_cli::SubstrateCli; -use sc_network::config::{NetworkBackendType, NodeKeyConfig, Secret}; +use sc_network::config::{NodeKeyConfig, Secret}; use sc_service::{BlocksPruning, PartialComponents, PruningMode}; use sp_core::{ crypto::{AccountId32, Ss58AddressFormat, Ss58Codec}, @@ -586,43 +586,20 @@ pub fn run() -> sc_cli::Result<()> { // Allow mining without peers if --dev or --force-authoring is set let allow_mining_without_peers = config.force_authoring; - match config.network.network_backend { - NetworkBackendType::Libp2p => { - log::info!("Using libp2p network backend (with Dilithium)"); - service::new_full::< - sc_network::NetworkWorker< - quantus_runtime::opaque::Block, - ::Hash, - >, - >( - config, - rewards_account, - cli.miner_listen_port, - cli.enable_peer_sharing, - cli.sync_max_timeouts_before_drop, - cli.sync_disable_major_sync_gating, - cli.sync_block_request_timeout, - allow_mining_without_peers, - ) - .map_err(sc_cli::Error::Service) - } - NetworkBackendType::Litep2p => { - log::info!("Using litep2p network backend (with Dilithium)"); - service::new_full::< - sc_network::litep2p::Litep2pNetworkBackend, - >( - config, - rewards_account, - cli.miner_listen_port, - cli.enable_peer_sharing, - cli.sync_max_timeouts_before_drop, - cli.sync_disable_major_sync_gating, - cli.sync_block_request_timeout, - allow_mining_without_peers, - ) - .map_err(sc_cli::Error::Service) - } - } + log::info!("Using litep2p network backend (with Dilithium)"); + service::new_full::< + sc_network::litep2p::Litep2pNetworkBackend, + >( + config, + rewards_account, + cli.miner_listen_port, + cli.enable_peer_sharing, + cli.sync_max_timeouts_before_drop, + cli.sync_disable_major_sync_gating, + cli.sync_block_request_timeout, + allow_mining_without_peers, + ) + .map_err(sc_cli::Error::Service) }) }, } From 7e7cc78d1fc50fceded6565d85c694b990ff10d3 Mon Sep 17 00:00:00 2001 From: illuzen Date: Sat, 30 May 2026 14:14:18 +0900 Subject: [PATCH 11/26] build warnings --- client/litep2p/Cargo.toml | 1 + client/litep2p/src/crypto/noise/mod.rs | 4 -- client/litep2p/src/crypto/noise/protocol.rs | 62 +++++++------------ client/litep2p/src/crypto/tls/mod.rs | 2 +- client/network/src/lib.rs | 20 +----- .../src/litep2p/shim/notification/config.rs | 2 + .../src/litep2p/shim/notification/peerset.rs | 2 + client/network/src/service.rs | 2 +- client/network/src/service/metrics.rs | 4 ++ client/network/src/service/signature.rs | 3 + 10 files changed, 39 insertions(+), 63 deletions(-) diff --git a/client/litep2p/Cargo.toml b/client/litep2p/Cargo.toml index a6205f93..2e7da257 100644 --- a/client/litep2p/Cargo.toml +++ b/client/litep2p/Cargo.toml @@ -83,6 +83,7 @@ hex-literal = "1.0.0" default = ["websocket", "quic"] websocket = ["dep:tokio-tungstenite"] quic = ["dep:webpki", "dep:quinn", "dep:rustls", "dep:rustls-pki-types", "dep:rustls-post-quantum", "dep:ring", "dep:rcgen"] +webrtc = ["dep:str0m"] fuzz = ["serde/derive", "serde/rc", "bytes/serde", "dep:serde_millis", "cid/serde", "multihash/serde"] # Compatibility feature - RSA support removed in favor of post-quantum Dilithium rsa = [] diff --git a/client/litep2p/src/crypto/noise/mod.rs b/client/litep2p/src/crypto/noise/mod.rs index 3bea109a..5712b11a 100644 --- a/client/litep2p/src/crypto/noise/mod.rs +++ b/client/litep2p/src/crypto/noise/mod.rs @@ -52,10 +52,6 @@ use std::{ mod protocol; -pub use protocol::{ - Keypair as NoiseKeypair, PublicKey as NoisePublicKey, SecretKey as NoiseSecretKey, - ML_KEM_768_CIPHERTEXT_SIZE, ML_KEM_768_PUBLIC_KEY_SIZE, ML_KEM_768_SECRET_KEY_SIZE, -}; use protocol::{ClatterSession, ClatterTransport}; mod handshake_schema { diff --git a/client/litep2p/src/crypto/noise/protocol.rs b/client/litep2p/src/crypto/noise/protocol.rs index ed3d6393..90528580 100644 --- a/client/litep2p/src/crypto/noise/protocol.rs +++ b/client/litep2p/src/crypto/noise/protocol.rs @@ -38,15 +38,6 @@ use zeroize::Zeroize; use crate::error::NegotiationError; -/// ML-KEM 768 public key size (FIPS 203) -pub const ML_KEM_768_PUBLIC_KEY_SIZE: usize = 1184; - -/// ML-KEM 768 secret key size (FIPS 203) -pub const ML_KEM_768_SECRET_KEY_SIZE: usize = 2400; - -/// ML-KEM 768 ciphertext size -pub const ML_KEM_768_CIPHERTEXT_SIZE: usize = 1088; - /// Clatter session that manages the pqXX handshake state with ML-KEM 768. pub struct ClatterSession { rng: Box, @@ -168,15 +159,6 @@ impl ClatterSession { .map_err(|e| NegotiationError::Clatter(format!("pqXX read failed: {:?}", e))) } - /// Check if this is an initiator. - pub fn is_initiator(&self) -> bool { - if let Some(handshake) = &self.handshake { - handshake.is_initiator() - } else { - self.is_initiator - } - } - /// Get the remote's static public key. pub fn get_remote_static(&self) -> Option> { self.handshake @@ -185,13 +167,6 @@ impl ClatterSession { .map(|k| k.as_slice().to_vec()) } - /// Check if the handshake is finished. - pub fn is_finished(&self) -> bool { - self.handshake - .as_ref() - .map_or(false, |h| h.is_finished()) - } - /// Convert to transport state after handshake completion. pub fn into_transport_mode(mut self) -> Result { self.ensure_handshake_initialized()?; @@ -293,20 +268,6 @@ impl AsRef<[u8]> for SecretKey { #[derive(Clone, PartialEq)] pub struct PublicKey(Vec); -impl PublicKey { - /// Create a public key from a slice. - pub fn from_slice(slice: &[u8]) -> Result { - if slice.len() != ML_KEM_768_PUBLIC_KEY_SIZE { - return Err(NegotiationError::Clatter(format!( - "Invalid ML-KEM 768 public key size: expected {}, got {}", - ML_KEM_768_PUBLIC_KEY_SIZE, - slice.len() - ))); - } - Ok(PublicKey(slice.to_vec())) - } -} - impl AsRef<[u8]> for PublicKey { fn as_ref(&self) -> &[u8] { &self.0 @@ -317,6 +278,29 @@ impl AsRef<[u8]> for PublicKey { mod tests { use super::*; + /// ML-KEM 768 public key size (FIPS 203) + const ML_KEM_768_PUBLIC_KEY_SIZE: usize = 1184; + + /// ML-KEM 768 secret key size (FIPS 203) + const ML_KEM_768_SECRET_KEY_SIZE: usize = 2400; + + /// Test helpers for ClatterSession + impl ClatterSession { + fn is_initiator(&self) -> bool { + if let Some(handshake) = &self.handshake { + handshake.is_initiator() + } else { + self.is_initiator + } + } + + fn is_finished(&self) -> bool { + self.handshake + .as_ref() + .map_or(false, |h| h.is_finished()) + } + } + #[test] fn keypair_generation_works() { let keypair = Keypair::new(); diff --git a/client/litep2p/src/crypto/tls/mod.rs b/client/litep2p/src/crypto/tls/mod.rs index fe9f348c..a520fa90 100644 --- a/client/litep2p/src/crypto/tls/mod.rs +++ b/client/litep2p/src/crypto/tls/mod.rs @@ -30,7 +30,7 @@ use crate::{crypto::dilithium::Keypair, PeerId}; -use rustls::pki_types::{CertificateDer, PrivateKeyDer}; +use rustls::pki_types::PrivateKeyDer; use std::sync::Arc; pub mod certificate; diff --git a/client/network/src/lib.rs b/client/network/src/lib.rs index 963bbf80..6601c2e2 100644 --- a/client/network/src/lib.rs +++ b/client/network/src/lib.rs @@ -271,6 +271,7 @@ pub mod types; pub mod utils; // Re-export request-response types from litep2p shim - this provides the `request_responses` module +/// Request-response protocol types re-exported from the litep2p shim. pub mod request_responses { pub use crate::litep2p::shim::request_response::{ IncomingRequest, OutboundRequest, OutgoingResponse, RequestResponseConfig, @@ -305,20 +306,8 @@ pub use service::{ }; pub use types::ProtocolName; -/// Log target for `sc-network`. -const LOG_TARGET: &str = "sub-libp2p"; - -/// The maximum allowed number of established connections per peer. -/// -/// Typically, and by design of the network behaviours in this crate, -/// there is a single established connection per peer. However, to -/// avoid unnecessary and nondeterministic connection closure in -/// case of (possibly repeated) simultaneous dialing attempts between -/// two peers, the per-peer connection limit is not set to 1 but 2. -const MAX_CONNECTIONS_PER_PEER: usize = 2; - /// The maximum number of concurrent established connections that were incoming. -const MAX_CONNECTIONS_ESTABLISHED_INCOMING: u32 = 10_000; +pub const MAX_CONNECTIONS_ESTABLISHED_INCOMING: u32 = 10_000; /// Maximum response size limit. pub const MAX_RESPONSE_SIZE: u64 = 16 * 1024 * 1024; @@ -332,8 +321,3 @@ static TRANSPORT_TIMEOUT: OnceLock = OnceLock::new(); pub fn set_transport_timeout(timeout: Duration) { TRANSPORT_TIMEOUT.set(timeout).ok(); } - -/// Returns the timeout for transport operations. -pub(crate) fn transport_timeout() -> Duration { - TRANSPORT_TIMEOUT.get().copied().unwrap_or(Duration::from_secs(30)) -} diff --git a/client/network/src/litep2p/shim/notification/config.rs b/client/network/src/litep2p/shim/notification/config.rs index 70e136da..a5a0826d 100644 --- a/client/network/src/litep2p/shim/notification/config.rs +++ b/client/network/src/litep2p/shim/notification/config.rs @@ -18,6 +18,8 @@ //! `litep2p` notification protocol configuration. +#![allow(missing_docs)] + use crate::{ config::{MultiaddrWithPeerId, NonReservedPeerMode, NotificationHandshake, SetConfig}, litep2p::shim::notification::{ diff --git a/client/network/src/litep2p/shim/notification/peerset.rs b/client/network/src/litep2p/shim/notification/peerset.rs index 38215881..dba61790 100644 --- a/client/network/src/litep2p/shim/notification/peerset.rs +++ b/client/network/src/litep2p/shim/notification/peerset.rs @@ -16,6 +16,8 @@ // You should have received a copy of the GNU General Public License // along with this program. If not, see . +#![allow(missing_docs)] + //! [`Peerset`] implementation for `litep2p`. //! //! [`Peerset`] is a separate but related component running alongside the notification protocol, diff --git a/client/network/src/service.rs b/client/network/src/service.rs index 6207740e..535e433e 100644 --- a/client/network/src/service.rs +++ b/client/network/src/service.rs @@ -21,7 +21,7 @@ //! This module provides shared types and traits used by the litep2p network backend. //! The libp2p backend has been removed - only litep2p is supported. -use sc_network_types::{multiaddr::Multiaddr, PeerId}; +use sc_network_types::multiaddr::Multiaddr; use std::collections::HashSet; pub mod metrics; diff --git a/client/network/src/service/metrics.rs b/client/network/src/service/metrics.rs index 5570411f..ce2caab9 100644 --- a/client/network/src/service/metrics.rs +++ b/client/network/src/service/metrics.rs @@ -16,6 +16,10 @@ // You should have received a copy of the GNU General Public License // along with this program. If not, see . +//! Network service metrics. + +#![allow(missing_docs)] + use crate::{service::traits::BandwidthSink, ProtocolName}; use prometheus_endpoint::{ diff --git a/client/network/src/service/signature.rs b/client/network/src/service/signature.rs index 75694f73..be71e208 100644 --- a/client/network/src/service/signature.rs +++ b/client/network/src/service/signature.rs @@ -29,6 +29,7 @@ use litep2p::crypto::{ /// Error during signing of a message. #[derive(Debug, thiserror::Error)] pub enum SigningError { + /// Signing operation failed. #[error("Signing failed")] SigningFailed, } @@ -36,8 +37,10 @@ pub enum SigningError { /// Error during decoding of key material. #[derive(Debug, thiserror::Error)] pub enum DecodingError { + /// Invalid key data. #[error("Invalid key data")] InvalidKey, + /// Unknown key type. #[error("Unknown key type")] UnknownKeyType, } From 568e4b7eac8f03860e36e1a3454e4c38fed730e4 Mon Sep 17 00:00:00 2001 From: illuzen Date: Sat, 30 May 2026 22:56:07 +0900 Subject: [PATCH 12/26] remove unused dependencies --- Cargo.lock | 245 ++++++++++++++++++++------------ client/cli/Cargo.toml | 2 - client/litep2p/Cargo.toml | 4 +- client/network-types/Cargo.toml | 1 - 4 files changed, 157 insertions(+), 95 deletions(-) diff --git a/Cargo.lock b/Cargo.lock index 33c9d2ed..8f35229d 100644 --- a/Cargo.lock +++ b/Cargo.lock @@ -853,6 +853,12 @@ version = "0.2.0" source = "registry+https://github.com/rust-lang/crates.io-index" checksum = "6107fe1be6682a68940da878d9e9f5e90ca5745b3dec9fd1bb393c8777d4f581" +[[package]] +name = "base64" +version = "0.21.7" +source = "registry+https://github.com/rust-lang/crates.io-index" +checksum = "9d297deb1925b89f2ccc13d7635fa0714f12c87adce1c75356b39ca9b7178567" + [[package]] name = "base64" version = "0.22.1" @@ -2876,7 +2882,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index" checksum = "39cab71617ae0d63f51a36d69f866391735b51691dbda63cf6f96d042b63efeb" dependencies = [ "libc", - "windows-sys 0.60.2", + "windows-sys 0.61.0", ] [[package]] @@ -2936,18 +2942,6 @@ version = "0.3.0" source = "registry+https://github.com/rust-lang/crates.io-index" checksum = "2acce4a10f12dc2fb14a218589d4f1f62ef011b2d0cc4b3cb1bba8e94da14649" -[[package]] -name = "fastbloom" -version = "0.14.1" -source = "registry+https://github.com/rust-lang/crates.io-index" -checksum = "4e7f34442dbe69c60fe8eaf58a8cafff81a1f278816d8ab4db255b3bef4ac3c4" -dependencies = [ - "getrandom 0.3.3", - "libm", - "rand 0.9.2", - "siphasher 1.0.1", -] - [[package]] name = "fastrand" version = "2.3.0" @@ -3575,7 +3569,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index" checksum = "a8f2f12607f92c69b12ed746fabf9ca4f5c482cba46679c1a75b874ed7c26adb" dependencies = [ "futures-io", - "rustls", + "rustls 0.23.32", "rustls-pki-types", ] @@ -4247,8 +4241,8 @@ dependencies = [ "hyper 1.7.0", "hyper-util", "log", - "rustls", - "rustls-native-certs", + "rustls 0.23.32", + "rustls-native-certs 0.8.1", "rustls-pki-types", "tokio 1.47.1", "tokio-rustls", @@ -4808,14 +4802,14 @@ version = "0.24.10" source = "registry+https://github.com/rust-lang/crates.io-index" checksum = "cc4280b709ac3bb5e16cf3bad5056a0ec8df55fa89edfe996361219aadc2c7ea" dependencies = [ - "base64", + "base64 0.22.1", "futures-util", "http 1.3.1", "jsonrpsee-core", "pin-project", - "rustls", + "rustls 0.23.32", "rustls-pki-types", - "rustls-platform-verifier 0.5.3", + "rustls-platform-verifier", "soketto", "thiserror 1.0.69", "tokio 1.47.1", @@ -5183,10 +5177,10 @@ dependencies = [ "libp2p-identity", "libp2p-tls", "parking_lot 0.12.4", - "quinn", + "quinn 0.11.9", "rand 0.8.5", "ring 0.17.14", - "rustls", + "rustls 0.23.32", "socket2 0.5.10", "thiserror 1.0.69", "tokio 1.47.1", @@ -5245,7 +5239,7 @@ dependencies = [ "libp2p-identity", "rcgen 0.11.3", "ring 0.17.14", - "rustls", + "rustls 0.23.32", "rustls-webpki 0.101.7", "thiserror 1.0.69", "x509-parser 0.16.0", @@ -5320,7 +5314,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index" checksum = "e79019718125edc905a079a70cfa5f3820bc76139fc91d6f9abc27ea2a887139" dependencies = [ "arrayref", - "base64", + "base64 0.22.1", "digest 0.9.0", "hmac-drbg", "libsecp256k1-core", @@ -5457,12 +5451,11 @@ dependencies = [ "prost-build 0.14.3", "qp-rusty-crystals-dilithium", "quickcheck", - "quinn", + "quinn 0.11.9", "rand 0.8.5", "rcgen 0.14.8", "ring 0.17.14", - "rustls", - "rustls-pki-types", + "rustls 0.23.32", "rustls-post-quantum", "serde", "serde_json", @@ -5483,7 +5476,6 @@ dependencies = [ "unsigned-varint 0.8.0", "url", "webpki", - "x25519-dalek", "x509-parser 0.17.0", "yamux", "yasna 0.5.2", @@ -6125,7 +6117,7 @@ version = "0.50.3" source = "registry+https://github.com/rust-lang/crates.io-index" checksum = "7957b9740744892f114936ab4a57b3f487491bbeafaf8083688b16841a4240e5" dependencies = [ - "windows-sys 0.60.2", + "windows-sys 0.61.0", ] [[package]] @@ -7062,7 +7054,7 @@ version = "3.0.5" source = "registry+https://github.com/rust-lang/crates.io-index" checksum = "38af38e8470ac9dee3ce1bae1af9c1671fffc44ddfd8bd1d0a3445bf349a8ef3" dependencies = [ - "base64", + "base64 0.22.1", "serde", ] @@ -7939,8 +7931,8 @@ version = "0.13.5" source = "registry+https://github.com/rust-lang/crates.io-index" checksum = "be769465445e8c1474e9c5dac2018218498557af32d9ed057325ec9a41ae81bf" dependencies = [ - "heck 0.4.1", - "itertools 0.10.5", + "heck 0.5.0", + "itertools 0.14.0", "log", "multimap", "once_cell", @@ -7959,8 +7951,8 @@ version = "0.14.3" source = "registry+https://github.com/rust-lang/crates.io-index" checksum = "343d3bd7056eda839b03204e68deff7d1b13aba7af2b2fd16890697274262ee7" dependencies = [ - "heck 0.4.1", - "itertools 0.10.5", + "heck 0.5.0", + "itertools 0.14.0", "log", "multimap", "petgraph 0.8.3", @@ -7992,7 +7984,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index" checksum = "8a56d757972c98b346a9b766e3f02746cde6dd1cd1d1d563472929fdd74bec4d" dependencies = [ "anyhow", - "itertools 0.10.5", + "itertools 0.14.0", "proc-macro2", "quote", "syn 2.0.106", @@ -8005,7 +7997,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index" checksum = "27c6023962132f4b30eb4c172c91ce92d933da334c59c23cddee82358ddafb0b" dependencies = [ "anyhow", - "itertools 0.10.5", + "itertools 0.14.0", "proc-macro2", "quote", "syn 2.0.106", @@ -8452,12 +8444,10 @@ dependencies = [ "qpow-math", "quantus-miner-api", "quantus-runtime", - "quinn", + "quinn 0.10.2", "rand 0.8.5", - "rcgen 0.14.8", - "rustls", - "rustls-pki-types", - "rustls-post-quantum", + "rcgen 0.11.3", + "rustls 0.21.12", "sc-basic-authorship", "sc-cli", "sc-client-api", @@ -8473,7 +8463,6 @@ dependencies = [ "sc-transaction-pool-api", "serde", "serde_json", - "sha2 0.10.9", "sp-api", "sp-block-builder", "sp-blockchain", @@ -8582,6 +8571,23 @@ dependencies = [ "rand 0.10.0", ] +[[package]] +name = "quinn" +version = "0.10.2" +source = "registry+https://github.com/rust-lang/crates.io-index" +checksum = "8cc2c5017e4b43d5995dcea317bc46c1e09404c0a9664d2908f7f02dfe943d75" +dependencies = [ + "bytes 1.11.1", + "pin-project-lite 0.2.16", + "quinn-proto 0.10.6", + "quinn-udp 0.4.1", + "rustc-hash 1.1.0", + "rustls 0.21.12", + "thiserror 1.0.69", + "tokio 1.47.1", + "tracing", +] + [[package]] name = "quinn" version = "0.11.9" @@ -8592,10 +8598,10 @@ dependencies = [ "cfg_aliases 0.2.1", "futures-io", "pin-project-lite 0.2.16", - "quinn-proto", - "quinn-udp", + "quinn-proto 0.11.13", + "quinn-udp 0.5.14", "rustc-hash 2.1.1", - "rustls", + "rustls 0.23.32", "socket2 0.6.0", "thiserror 2.0.18", "tokio 1.47.1", @@ -8603,6 +8609,24 @@ dependencies = [ "web-time", ] +[[package]] +name = "quinn-proto" +version = "0.10.6" +source = "registry+https://github.com/rust-lang/crates.io-index" +checksum = "141bf7dfde2fbc246bfd3fe12f2455aa24b0fbd9af535d8c86c7bd1381ff2b1a" +dependencies = [ + "bytes 1.11.1", + "rand 0.8.5", + "ring 0.16.20", + "rustc-hash 1.1.0", + "rustls 0.21.12", + "rustls-native-certs 0.6.3", + "slab", + "thiserror 1.0.69", + "tinyvec", + "tracing", +] + [[package]] name = "quinn-proto" version = "0.11.13" @@ -8611,15 +8635,13 @@ checksum = "f1906b49b0c3bc04b5fe5d86a77925ae6524a19b816ae38ce1e426255f1d8a31" dependencies = [ "aws-lc-rs", "bytes 1.11.1", - "fastbloom", "getrandom 0.3.3", "lru-slab", "rand 0.9.2", "ring 0.17.14", "rustc-hash 2.1.1", - "rustls", + "rustls 0.23.32", "rustls-pki-types", - "rustls-platform-verifier 0.6.2", "slab", "thiserror 2.0.18", "tinyvec", @@ -8627,6 +8649,19 @@ dependencies = [ "web-time", ] +[[package]] +name = "quinn-udp" +version = "0.4.1" +source = "registry+https://github.com/rust-lang/crates.io-index" +checksum = "055b4e778e8feb9f93c4e439f71dc2156ef13360b432b799e179a8c4cdf0b1d7" +dependencies = [ + "bytes 1.11.1", + "libc", + "socket2 0.5.10", + "tracing", + "windows-sys 0.48.0", +] + [[package]] name = "quinn-udp" version = "0.5.14" @@ -9106,7 +9141,18 @@ dependencies = [ "errno", "libc", "linux-raw-sys", - "windows-sys 0.60.2", + "windows-sys 0.61.0", +] + +[[package]] +name = "rustls" +version = "0.21.12" +source = "registry+https://github.com/rust-lang/crates.io-index" +checksum = "3f56a14d1f48b391359b22f731fd4bd7e43c97f3c50eee276f3aa09c94784d3e" +dependencies = [ + "ring 0.17.14", + "rustls-webpki 0.101.7", + "sct", ] [[package]] @@ -9125,6 +9171,18 @@ dependencies = [ "zeroize", ] +[[package]] +name = "rustls-native-certs" +version = "0.6.3" +source = "registry+https://github.com/rust-lang/crates.io-index" +checksum = "a9aace74cb666635c918e9c12bc0d348266037aa8eb599b5cba565709a8dff00" +dependencies = [ + "openssl-probe", + "rustls-pemfile", + "schannel", + "security-framework 2.11.1", +] + [[package]] name = "rustls-native-certs" version = "0.8.1" @@ -9134,7 +9192,16 @@ dependencies = [ "openssl-probe", "rustls-pki-types", "schannel", - "security-framework", + "security-framework 3.5.0", +] + +[[package]] +name = "rustls-pemfile" +version = "1.0.4" +source = "registry+https://github.com/rust-lang/crates.io-index" +checksum = "1c74cae0a4cf6ccbbf5f359f08efdf8ee7e1dc532573bf0db71968cb56b1448c" +dependencies = [ + "base64 0.21.7", ] [[package]] @@ -9158,37 +9225,16 @@ dependencies = [ "jni", "log", "once_cell", - "rustls", - "rustls-native-certs", + "rustls 0.23.32", + "rustls-native-certs 0.8.1", "rustls-platform-verifier-android", "rustls-webpki 0.103.6", - "security-framework", + "security-framework 3.5.0", "security-framework-sys", "webpki-root-certs 0.26.11", "windows-sys 0.59.0", ] -[[package]] -name = "rustls-platform-verifier" -version = "0.6.2" -source = "registry+https://github.com/rust-lang/crates.io-index" -checksum = "1d99feebc72bae7ab76ba994bb5e121b8d83d910ca40b36e0921f53becc41784" -dependencies = [ - "core-foundation 0.10.1", - "core-foundation-sys", - "jni", - "log", - "once_cell", - "rustls", - "rustls-native-certs", - "rustls-platform-verifier-android", - "rustls-webpki 0.103.6", - "security-framework", - "security-framework-sys", - "webpki-root-certs 1.0.2", - "windows-sys 0.60.2", -] - [[package]] name = "rustls-platform-verifier-android" version = "0.1.1" @@ -9202,7 +9248,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index" checksum = "0da3cd9229bac4fae1f589c8f875b3c891a058ddaa26eb3bde16b5e43dc174ce" dependencies = [ "aws-lc-rs", - "rustls", + "rustls 0.23.32", "rustls-webpki 0.103.6", ] @@ -9450,7 +9496,6 @@ dependencies = [ "sp-blockchain", "sp-core", "sp-keyring", - "sp-keystore", "sp-panic-handler", "sp-runtime", "sp-tracing", @@ -9925,7 +9970,6 @@ dependencies = [ "qp-rusty-crystals-dilithium", "quickcheck", "rand 0.8.5", - "serde", "serde_with", "thiserror 1.0.69", "zeroize", @@ -9950,7 +9994,7 @@ dependencies = [ "parity-scale-codec", "parking_lot 0.12.4", "rand 0.8.5", - "rustls", + "rustls 0.23.32", "sc-client-api", "sc-network", "sc-network-types", @@ -10535,6 +10579,16 @@ dependencies = [ "sha2 0.10.9", ] +[[package]] +name = "sct" +version = "0.7.1" +source = "registry+https://github.com/rust-lang/crates.io-index" +checksum = "da046153aa2352493d6cb7da4b6e5c0c057d8a1d0a9aa8560baffdd945acd414" +dependencies = [ + "ring 0.17.14", + "untrusted 0.9.0", +] + [[package]] name = "sctp-proto" version = "0.5.0" @@ -10639,6 +10693,19 @@ dependencies = [ "zeroize", ] +[[package]] +name = "security-framework" +version = "2.11.1" +source = "registry+https://github.com/rust-lang/crates.io-index" +checksum = "897b2245f0b511c87893af39b033e5ca9cce68824c4d7e7630b5a1d339658d02" +dependencies = [ + "bitflags 2.9.4", + "core-foundation 0.9.4", + "core-foundation-sys", + "libc", + "security-framework-sys", +] + [[package]] name = "security-framework" version = "3.5.0" @@ -10764,7 +10831,7 @@ version = "3.14.1" source = "registry+https://github.com/rust-lang/crates.io-index" checksum = "c522100790450cf78eeac1507263d0a350d4d5b30df0c8e1fe051a10c22b376e" dependencies = [ - "base64", + "base64 0.22.1", "chrono", "hex", "serde", @@ -10972,7 +11039,7 @@ dependencies = [ "arrayvec 0.7.6", "async-lock", "atomic-take", - "base64", + "base64 0.22.1", "bip39", "blake2-rfc", "bs58", @@ -11025,7 +11092,7 @@ checksum = "f1bba9e591716567d704a8252feeb2f1261a286e1e2cbdd4e49e9197c34a14e2" dependencies = [ "async-channel 2.5.0", "async-lock", - "base64", + "base64 0.22.1", "blake2-rfc", "bs58", "derive_more 2.0.1", @@ -11085,7 +11152,7 @@ version = "0.8.1" source = "registry+https://github.com/rust-lang/crates.io-index" checksum = "2e859df029d160cb88608f5d7df7fb4753fd20fdfb4de5644f3d8b8440841721" dependencies = [ - "base64", + "base64 0.22.1", "bytes 1.11.1", "futures 0.3.31", "http 1.3.1", @@ -12300,7 +12367,7 @@ version = "0.43.0" source = "registry+https://github.com/rust-lang/crates.io-index" checksum = "9a9bd240ae819f64ac6898d7ec99a88c8b838dba2fb9d83b843feb70e77e34c8" dependencies = [ - "base64", + "base64 0.22.1", "bip32", "bip39", "cfg-if", @@ -12444,7 +12511,7 @@ dependencies = [ "getrandom 0.3.3", "once_cell", "rustix", - "windows-sys 0.60.2", + "windows-sys 0.61.0", ] [[package]] @@ -12711,7 +12778,7 @@ version = "0.26.3" source = "registry+https://github.com/rust-lang/crates.io-index" checksum = "05f63835928ca123f1bef57abbcd23bb2ba0ac9ae1235f1e65bda0d06e7786bd" dependencies = [ - "rustls", + "rustls 0.23.32", "tokio 1.47.1", ] @@ -12735,8 +12802,8 @@ checksum = "489a59b6730eda1b0171fcfda8b121f4bee2b35cba8645ca35c5f7ba3eb736c1" dependencies = [ "futures-util", "log", - "rustls", - "rustls-native-certs", + "rustls 0.23.32", + "rustls-native-certs 0.8.1", "rustls-pki-types", "tokio 1.47.1", "tokio-rustls", @@ -13036,7 +13103,7 @@ dependencies = [ "httparse", "log", "rand 0.9.2", - "rustls", + "rustls 0.23.32", "rustls-pki-types", "sha1", "thiserror 2.0.18", @@ -13743,7 +13810,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index" checksum = "138e33ad4bd120f3b1c77d6d0dcdce0de8239555495befcda89393a40ba5e324" dependencies = [ "anyhow", - "base64", + "base64 0.22.1", "directories-next", "log", "postcard", @@ -13971,7 +14038,7 @@ version = "0.1.11" source = "registry+https://github.com/rust-lang/crates.io-index" checksum = "c2a7b1c03c876122aa43f3020e6c3c3ee5c05081c9a00739faf7503aeba10d22" dependencies = [ - "windows-sys 0.60.2", + "windows-sys 0.61.0", ] [[package]] diff --git a/client/cli/Cargo.toml b/client/cli/Cargo.toml index aa44cba9..dbee227a 100644 --- a/client/cli/Cargo.toml +++ b/client/cli/Cargo.toml @@ -59,8 +59,6 @@ sp-core.default-features = true sp-core.workspace = true sp-keyring.default-features = true sp-keyring.workspace = true -sp-keystore.default-features = true -sp-keystore.workspace = true sp-panic-handler.default-features = true sp-panic-handler.workspace = true sp-runtime.default-features = true diff --git a/client/litep2p/Cargo.toml b/client/litep2p/Cargo.toml index 2e7da257..d712c436 100644 --- a/client/litep2p/Cargo.toml +++ b/client/litep2p/Cargo.toml @@ -44,7 +44,6 @@ tracing = { workspace = true, features = ["log"] } uint = "0.10.0" unsigned-varint = { version = "0.8.0", features = ["codec"] } url = "2.5.4" -x25519-dalek = { workspace = true } x509-parser = { workspace = true } yamux = { workspace = true } yasna = { workspace = true } @@ -62,7 +61,6 @@ quinn = { workspace = true, features = ["rustls-aws-lc-rs", "runtime-tokio"], op rcgen = { workspace = true, features = ["aws_lc_rs"], optional = true } ring = { workspace = true, optional = true } rustls = { workspace = true, features = ["std", "aws-lc-rs"], optional = true } -rustls-pki-types = { workspace = true, optional = true } rustls-post-quantum = { workspace = true, optional = true } webpki = { workspace = true, optional = true } @@ -82,7 +80,7 @@ hex-literal = "1.0.0" [features] default = ["websocket", "quic"] websocket = ["dep:tokio-tungstenite"] -quic = ["dep:webpki", "dep:quinn", "dep:rustls", "dep:rustls-pki-types", "dep:rustls-post-quantum", "dep:ring", "dep:rcgen"] +quic = ["dep:webpki", "dep:quinn", "dep:rustls", "dep:rustls-post-quantum", "dep:ring", "dep:rcgen"] webrtc = ["dep:str0m"] fuzz = ["serde/derive", "serde/rc", "bytes/serde", "dep:serde_millis", "cid/serde", "multihash/serde"] # Compatibility feature - RSA support removed in favor of post-quantum Dilithium diff --git a/client/network-types/Cargo.toml b/client/network-types/Cargo.toml index 511d94b3..fbd6e8ce 100644 --- a/client/network-types/Cargo.toml +++ b/client/network-types/Cargo.toml @@ -22,7 +22,6 @@ multiaddr = "0.18.1" multihash = { version = "0.19.1", default-features = false } qp-rusty-crystals-dilithium = { workspace = true } rand = { workspace = true } -serde = { workspace = true } serde_with = { version = "3.12.0", default-features = false, features = ["hex", "macros"] } thiserror = { workspace = true } zeroize = { workspace = true } From 627bb6eb5d85316862a86b183db1b8fc97c90af1 Mon Sep 17 00:00:00 2001 From: illuzen Date: Sat, 30 May 2026 23:15:36 +0900 Subject: [PATCH 13/26] remove unused dependencies Removed: - qp-wormhole-verifier, sp-keyring from runtime - codec from sp-consensus-qpow - qp-poseidon, sp-io from qp-dilithium-crypto - qp-poseidon from qp-wormhole - log from pallet-multisig, pallet-zk-tree - sp-weights from pallet-scheduler - sp-metadata-ir from pallet-wormhole - num-traits, sp-arithmetic from pallet-qpow - qp-poseidon from pallet-mining-rewards - qp-high-security from pallet-reversible-transfers - qp-poseidon, qp-rusty-crystals-dilithium from node - sc-service from sc-consensus-qpow Note: codec and scale-info are required by frame macros even if not directly imported - cargo-machete reports false positives for pallets. --- Cargo.lock | 17 ----------------- client/consensus/qpow/Cargo.toml | 1 - node/Cargo.toml | 2 -- pallets/mining-rewards/Cargo.toml | 3 --- pallets/multisig/Cargo.toml | 2 -- pallets/qpow/Cargo.toml | 4 ---- pallets/reversible-transfers/Cargo.toml | 2 -- pallets/scheduler/Cargo.toml | 2 -- pallets/wormhole/Cargo.toml | 5 +---- pallets/zk-tree/Cargo.toml | 2 -- primitives/consensus/qpow/Cargo.toml | 2 -- primitives/dilithium-crypto/Cargo.toml | 5 ----- primitives/wormhole/Cargo.toml | 2 -- runtime/Cargo.toml | 4 ---- 14 files changed, 1 insertion(+), 52 deletions(-) diff --git a/Cargo.lock b/Cargo.lock index 8f35229d..523757fd 100644 --- a/Cargo.lock +++ b/Cargo.lock @@ -6572,7 +6572,6 @@ dependencies = [ "pallet-balances", "pallet-treasury", "parity-scale-codec", - "qp-poseidon", "qp-wormhole", "scale-info", "sp-consensus-qpow", @@ -6588,7 +6587,6 @@ dependencies = [ "frame-benchmarking", "frame-support", "frame-system", - "log", "pallet-assets", "pallet-assets-holder", "pallet-balances", @@ -6635,14 +6633,12 @@ dependencies = [ "frame-system", "hex", "log", - "num-traits", "pallet-timestamp", "parity-scale-codec", "primitive-types 0.13.1", "qp-poseidon-core", "qpow-math", "scale-info", - "sp-arithmetic", "sp-core", "sp-io", "sp-runtime", @@ -6714,7 +6710,6 @@ dependencies = [ "pallet-timestamp", "pallet-utility", "parity-scale-codec", - "qp-high-security", "qp-scheduler", "qp-wormhole", "scale-info", @@ -6740,7 +6735,6 @@ dependencies = [ "sp-core", "sp-io", "sp-runtime", - "sp-weights", "substrate-test-utils", ] @@ -6868,7 +6862,6 @@ dependencies = [ "scale-info", "sp-core", "sp-io", - "sp-metadata-ir", "sp-runtime", "sp-state-machine", "sp-trie", @@ -6880,7 +6873,6 @@ version = "0.1.0" dependencies = [ "frame-support", "frame-system", - "log", "parity-scale-codec", "qp-poseidon-core", "scale-info", @@ -8051,13 +8043,11 @@ dependencies = [ "env_logger", "log", "parity-scale-codec", - "qp-poseidon", "qp-poseidon-core", "qp-rusty-crystals-dilithium", "qp-rusty-crystals-hdwallet", "scale-info", "sp-core", - "sp-io", "sp-runtime", "thiserror 1.0.69", ] @@ -8280,7 +8270,6 @@ name = "qp-wormhole" version = "0.1.0" dependencies = [ "parity-scale-codec", - "qp-poseidon", "qp-poseidon-core", "sp-consensus-qpow", "sp-core", @@ -8437,8 +8426,6 @@ dependencies = [ "parity-scale-codec", "prometheus", "qp-dilithium-crypto", - "qp-poseidon", - "qp-rusty-crystals-dilithium", "qp-rusty-crystals-hdwallet", "qp-wormhole", "qpow-math", @@ -8524,7 +8511,6 @@ dependencies = [ "qp-poseidon-core", "qp-scheduler", "qp-wormhole", - "qp-wormhole-verifier", "scale-info", "serde_json", "smallvec", @@ -8535,7 +8521,6 @@ dependencies = [ "sp-genesis-builder", "sp-inherents", "sp-io", - "sp-keyring", "sp-offchain", "sp-runtime", "sp-session", @@ -9651,7 +9636,6 @@ dependencies = [ "primitive-types 0.13.1", "sc-client-api", "sc-consensus", - "sc-service", "sp-api", "sp-block-builder", "sp-blockchain", @@ -11345,7 +11329,6 @@ dependencies = [ name = "sp-consensus-qpow" version = "0.1.0" dependencies = [ - "parity-scale-codec", "primitive-types 0.13.1", "sp-api", "sp-runtime", diff --git a/client/consensus/qpow/Cargo.toml b/client/consensus/qpow/Cargo.toml index 51f8d121..a3a0b93e 100644 --- a/client/consensus/qpow/Cargo.toml +++ b/client/consensus/qpow/Cargo.toml @@ -17,7 +17,6 @@ primitive-types = { workspace = true, default-features = false } prometheus-endpoint = { workspace = true, default-features = true } sc-client-api = { workspace = true, default-features = false } sc-consensus = { workspace = true } -sc-service = { workspace = true, default-features = false } sp-api = { workspace = true, default-features = false } sp-block-builder = { workspace = true, default-features = true } sp-blockchain = { workspace = true, default-features = false } diff --git a/node/Cargo.toml b/node/Cargo.toml index 3761d166..68eb4326 100644 --- a/node/Cargo.toml +++ b/node/Cargo.toml @@ -40,8 +40,6 @@ pallet-zk-tree.default-features = true pallet-zk-tree.workspace = true prometheus.workspace = true qp-dilithium-crypto = { workspace = true } -qp-poseidon.workspace = true -qp-rusty-crystals-dilithium.workspace = true qp-rusty-crystals-hdwallet.workspace = true qp-wormhole.workspace = true qpow-math.workspace = true diff --git a/pallets/mining-rewards/Cargo.toml b/pallets/mining-rewards/Cargo.toml index 37e8b760..1c19cc26 100644 --- a/pallets/mining-rewards/Cargo.toml +++ b/pallets/mining-rewards/Cargo.toml @@ -23,7 +23,6 @@ frame-support.workspace = true frame-system.workspace = true log.workspace = true pallet-treasury = { path = "../treasury", default-features = false } -qp-poseidon.workspace = true qp-wormhole.workspace = true scale-info = { workspace = true, default-features = false, features = ["derive"] } sp-consensus-qpow.workspace = true @@ -32,7 +31,6 @@ sp-runtime.workspace = true [dev-dependencies] pallet-balances.features = ["std"] pallet-balances.workspace = true -qp-poseidon.workspace = true sp-core.workspace = true sp-io.workspace = true @@ -49,7 +47,6 @@ std = [ "frame-support/std", "frame-system/std", "pallet-treasury/std", - "qp-poseidon/std", "qp-wormhole/std", "scale-info/std", "sp-consensus-qpow/std", diff --git a/pallets/multisig/Cargo.toml b/pallets/multisig/Cargo.toml index 5b628e7d..3a2ed784 100644 --- a/pallets/multisig/Cargo.toml +++ b/pallets/multisig/Cargo.toml @@ -16,7 +16,6 @@ codec = { features = ["derive", "max-encoded-len"], workspace = true } frame-benchmarking = { optional = true, workspace = true } frame-support.workspace = true frame-system.workspace = true -log.workspace = true pallet-balances.workspace = true pallet-reversible-transfers = { path = "../reversible-transfers", default-features = false, optional = true } qp-high-security = { path = "../../primitives/high-security", default-features = false } @@ -62,7 +61,6 @@ std = [ "frame-benchmarking?/std", "frame-support/std", "frame-system/std", - "log/std", "pallet-balances/std", "pallet-reversible-transfers?/std", "pallet-timestamp/std", diff --git a/pallets/qpow/Cargo.toml b/pallets/qpow/Cargo.toml index 7d9f94fe..0a11eb3b 100644 --- a/pallets/qpow/Cargo.toml +++ b/pallets/qpow/Cargo.toml @@ -23,12 +23,10 @@ frame-support.workspace = true frame-system.workspace = true hex.workspace = true log.workspace = true -num-traits.workspace = true pallet-timestamp.workspace = true qp-poseidon-core.workspace = true qpow-math.workspace = true scale-info = { workspace = true, default-features = false, features = ["derive"] } -sp-arithmetic.workspace = true sp-core.workspace = true sp-io.workspace = true sp-runtime.workspace = true @@ -50,12 +48,10 @@ std = [ "frame-support/std", "frame-system/std", "log/std", - "num-traits/std", "pallet-timestamp/std", "primitive-types/std", "qpow-math/std", "scale-info/std", - "sp-arithmetic/std", "sp-core/std", "sp-io/std", "sp-runtime/std", diff --git a/pallets/reversible-transfers/Cargo.toml b/pallets/reversible-transfers/Cargo.toml index 8f22d300..08713427 100644 --- a/pallets/reversible-transfers/Cargo.toml +++ b/pallets/reversible-transfers/Cargo.toml @@ -21,7 +21,6 @@ pallet-assets.workspace = true pallet-assets-holder.workspace = true pallet-balances.workspace = true pallet-recovery.workspace = true -qp-high-security = { path = "../../primitives/high-security", default-features = false } qp-scheduler.workspace = true qp-wormhole.workspace = true scale-info = { features = ["derive"], workspace = true } @@ -55,7 +54,6 @@ std = [ "pallet-scheduler/std", "pallet-timestamp/std", "pallet-utility/std", - "qp-high-security/std", "qp-scheduler/std", "qp-wormhole/std", "scale-info/std", diff --git a/pallets/scheduler/Cargo.toml b/pallets/scheduler/Cargo.toml index 85bb95e0..48ef4e93 100644 --- a/pallets/scheduler/Cargo.toml +++ b/pallets/scheduler/Cargo.toml @@ -20,7 +20,6 @@ qp-scheduler.workspace = true scale-info = { features = ["derive"], workspace = true } sp-io.workspace = true sp-runtime.workspace = true -sp-weights.workspace = true [dev-dependencies] pallet-preimage.workspace = true @@ -48,7 +47,6 @@ std = [ "sp-core/std", "sp-io/std", "sp-runtime/std", - "sp-weights/std", ] try-runtime = [ "frame-support/try-runtime", diff --git a/pallets/wormhole/Cargo.toml b/pallets/wormhole/Cargo.toml index e65b0586..4e02ab0f 100644 --- a/pallets/wormhole/Cargo.toml +++ b/pallets/wormhole/Cargo.toml @@ -21,12 +21,9 @@ qp-header = { workspace = true, features = ["serde"] } qp-poseidon.workspace = true qp-wormhole.workspace = true qp-wormhole-verifier = { workspace = true, default-features = false } -scale-info = { workspace = true, default-features = false, features = [ - "derive", -] } +scale-info = { workspace = true, default-features = false, features = ["derive"] } sp-core.workspace = true sp-io.workspace = true -sp-metadata-ir.workspace = true sp-runtime.workspace = true [build-dependencies] diff --git a/pallets/zk-tree/Cargo.toml b/pallets/zk-tree/Cargo.toml index 8fef0f97..63f0cd82 100644 --- a/pallets/zk-tree/Cargo.toml +++ b/pallets/zk-tree/Cargo.toml @@ -12,7 +12,6 @@ version = "0.1.0" codec = { workspace = true, default-features = false, features = ["derive"] } frame-support.workspace = true frame-system.workspace = true -log.workspace = true qp-poseidon-core = { workspace = true, default-features = false } scale-info = { workspace = true, default-features = false, features = ["derive"] } serde = { workspace = true, optional = true } @@ -33,7 +32,6 @@ std = [ "codec/std", "frame-support/std", "frame-system/std", - "log/std", "qp-poseidon-core/std", "scale-info/std", "serde/std", diff --git a/primitives/consensus/qpow/Cargo.toml b/primitives/consensus/qpow/Cargo.toml index 2aaa07fd..86e1da7e 100644 --- a/primitives/consensus/qpow/Cargo.toml +++ b/primitives/consensus/qpow/Cargo.toml @@ -9,7 +9,6 @@ repository.workspace = true version = "0.1.0" [dependencies] -codec = { default-features = false, workspace = true } primitive-types = { default-features = false, workspace = true } sp-api = { default-features = false, workspace = true } sp-runtime = { default-features = false, workspace = true } @@ -17,7 +16,6 @@ sp-runtime = { default-features = false, workspace = true } [features] default = ["std"] std = [ - "codec/std", "primitive-types/std", "sp-api/std", "sp-runtime/std", diff --git a/primitives/dilithium-crypto/Cargo.toml b/primitives/dilithium-crypto/Cargo.toml index 55138fa5..aa4509f0 100644 --- a/primitives/dilithium-crypto/Cargo.toml +++ b/primitives/dilithium-crypto/Cargo.toml @@ -21,13 +21,11 @@ version = "0.3.1" [dependencies] codec = { workspace = true, default-features = false } log = { workspace = true } -qp-poseidon = { workspace = true } qp-poseidon-core = { workspace = true } qp-rusty-crystals-dilithium = { workspace = true, default-features = false } qp-rusty-crystals-hdwallet = { workspace = true, optional = true } scale-info = { workspace = true, default-features = false } sp-core = { workspace = true, default-features = false } -sp-io = { workspace = true, default-features = false } sp-runtime = { workspace = true, default-features = false } thiserror = { workspace = true, optional = true } @@ -40,17 +38,14 @@ full_crypto = [ "sp-core/full_crypto", ] serde = [ - "qp-poseidon/serde", "sp-core/serde", ] std = [ "codec/std", "full_crypto", - "qp-poseidon/std", "qp-rusty-crystals-hdwallet", "scale-info/std", "sp-core/std", - "sp-io/std", "sp-runtime/std", "thiserror", ] diff --git a/primitives/wormhole/Cargo.toml b/primitives/wormhole/Cargo.toml index 5138a9c9..106e879e 100644 --- a/primitives/wormhole/Cargo.toml +++ b/primitives/wormhole/Cargo.toml @@ -11,7 +11,6 @@ version = "0.1.0" [dependencies] codec = { workspace = true, default-features = false } -qp-poseidon.workspace = true qp-poseidon-core.workspace = true sp-consensus-qpow.workspace = true sp-core = { workspace = true, optional = true } @@ -22,7 +21,6 @@ default = ["std"] std = [ "codec/std", "qp-poseidon-core/std", - "qp-poseidon/std", "sp-consensus-qpow/std", "sp-core", "sp-runtime/std", diff --git a/runtime/Cargo.toml b/runtime/Cargo.toml index cebdeacb..2837ffca 100644 --- a/runtime/Cargo.toml +++ b/runtime/Cargo.toml @@ -54,7 +54,6 @@ qp-high-security = { path = "../primitives/high-security", default-features = fa qp-poseidon = { workspace = true, features = ["serde"] } qp-scheduler.workspace = true qp-wormhole.workspace = true -qp-wormhole-verifier = { workspace = true, default-features = false } scale-info = { features = ["derive", "serde"], workspace = true } serde_json = { workspace = true, default-features = false, features = [ "alloc", @@ -66,7 +65,6 @@ sp-consensus-qpow.workspace = true sp-core = { features = ["serde"], workspace = true } sp-genesis-builder.workspace = true sp-inherents.workspace = true -sp-keyring.workspace = true sp-offchain.workspace = true sp-runtime = { features = ["serde"], workspace = true } sp-session.workspace = true @@ -82,7 +80,6 @@ env_logger.workspace = true qp-dilithium-crypto.workspace = true qp-poseidon-core.workspace = true sp-io.workspace = true -sp-keyring = { workspace = true, features = ["std"] } [features] default = ["std"] @@ -133,7 +130,6 @@ std = [ "sp-genesis-builder/std", "sp-inherents/std", "sp-io/std", - "sp-keyring/std", "sp-offchain/std", "sp-runtime/std", "sp-session/std", From de6d22b0da245d453e6b24944ff4cc0dfda48d23 Mon Sep 17 00:00:00 2001 From: illuzen Date: Sat, 30 May 2026 23:29:20 +0900 Subject: [PATCH 14/26] fmt --- client/cli/Cargo.toml | 4 +- client/cli/src/commands/generate_node_key.rs | 2 +- client/cli/src/commands/inspect_node_key.rs | 2 +- client/litep2p/Cargo.toml | 44 +- client/litep2p/build.rs | 38 +- client/litep2p/src/addresses.rs | 193 +- client/litep2p/src/bandwidth.rs | 76 +- client/litep2p/src/codec/identity.rs | 173 +- client/litep2p/src/codec/mod.rs | 12 +- client/litep2p/src/codec/unsigned_varint.rs | 172 +- client/litep2p/src/config.rs | 588 +- client/litep2p/src/crypto/dilithium.rs | 479 +- client/litep2p/src/crypto/mod.rs | 116 +- client/litep2p/src/crypto/noise/mod.rs | 1699 ++-- client/litep2p/src/crypto/noise/protocol.rs | 592 +- client/litep2p/src/crypto/tls/certificate.rs | 750 +- client/litep2p/src/crypto/tls/mod.rs | 56 +- client/litep2p/src/crypto/tls/verifier.rs | 308 +- client/litep2p/src/error.rs | 812 +- client/litep2p/src/executor.rs | 58 +- client/litep2p/src/lib.rs | 1149 ++- client/litep2p/src/mock/substream.rs | 202 +- .../src/multistream_select/dialer_select.rs | 1583 ++-- .../multistream_select/length_delimited.rs | 588 +- .../src/multistream_select/listener_select.rs | 925 +-- client/litep2p/src/multistream_select/mod.rs | 190 +- .../src/multistream_select/negotiated.rs | 554 +- .../src/multistream_select/protocol.rs | 742 +- client/litep2p/src/peer_id.rs | 517 +- client/litep2p/src/protocol/connection.rs | 414 +- .../src/protocol/libp2p/bitswap/config.rs | 52 +- .../src/protocol/libp2p/bitswap/handle.rs | 168 +- .../src/protocol/libp2p/bitswap/mod.rs | 1409 ++-- .../litep2p/src/protocol/libp2p/identify.rs | 696 +- .../src/protocol/libp2p/kademlia/bucket.rs | 282 +- .../src/protocol/libp2p/kademlia/config.rs | 494 +- .../src/protocol/libp2p/kademlia/executor.rs | 909 +-- .../src/protocol/libp2p/kademlia/handle.rs | 840 +- .../src/protocol/libp2p/kademlia/message.rs | 769 +- .../src/protocol/libp2p/kademlia/mod.rs | 2999 ++++--- .../libp2p/kademlia/query/find_many_nodes.rs | 61 +- .../libp2p/kademlia/query/find_node.rs | 1307 ++- .../libp2p/kademlia/query/get_providers.rs | 933 ++- .../libp2p/kademlia/query/get_record.rs | 1071 ++- .../src/protocol/libp2p/kademlia/query/mod.rs | 4045 +++++---- .../libp2p/kademlia/query/target_peers.rs | 222 +- .../src/protocol/libp2p/kademlia/record.rs | 187 +- .../protocol/libp2p/kademlia/routing_table.rs | 1021 ++- .../src/protocol/libp2p/kademlia/store.rs | 2019 +++-- .../src/protocol/libp2p/kademlia/types.rs | 413 +- .../src/protocol/libp2p/ping/config.rs | 158 +- .../litep2p/src/protocol/libp2p/ping/mod.rs | 450 +- client/litep2p/src/protocol/mdns.rs | 761 +- client/litep2p/src/protocol/mod.rs | 166 +- .../src/protocol/notification/config.rs | 392 +- .../src/protocol/notification/connection.rs | 412 +- .../src/protocol/notification/handle.rs | 895 +- .../litep2p/src/protocol/notification/mod.rs | 3437 ++++---- .../src/protocol/notification/negotiation.rs | 723 +- .../src/protocol/notification/tests/mod.rs | 100 +- .../notification/tests/notification.rs | 1823 ++--- .../tests/substream_validation.rs | 767 +- .../src/protocol/notification/types.rs | 284 +- client/litep2p/src/protocol/protocol_set.rs | 1156 ++- .../src/protocol/request_response/config.rs | 238 +- .../src/protocol/request_response/handle.rs | 918 +-- .../src/protocol/request_response/mod.rs | 1805 ++--- .../src/protocol/request_response/tests.rs | 405 +- .../litep2p/src/protocol/transport_service.rs | 3173 ++++---- client/litep2p/src/substream/mod.rs | 1865 +++-- .../litep2p/src/transport/common/listener.rs | 1241 ++- client/litep2p/src/transport/dummy.rs | 212 +- .../litep2p/src/transport/manager/address.rs | 1106 ++- .../litep2p/src/transport/manager/handle.rs | 1537 ++-- .../litep2p/src/transport/manager/limits.rs | 352 +- client/litep2p/src/transport/manager/mod.rs | 7199 ++++++++--------- .../src/transport/manager/peer_state.rs | 1504 ++-- client/litep2p/src/transport/manager/types.rs | 42 +- client/litep2p/src/transport/mod.rs | 302 +- client/litep2p/src/transport/quic/config.rs | 46 +- .../litep2p/src/transport/quic/connection.rs | 700 +- client/litep2p/src/transport/quic/listener.rs | 765 +- client/litep2p/src/transport/quic/mod.rs | 1219 ++- .../litep2p/src/transport/quic/substream.rs | 225 +- client/litep2p/src/transport/tcp/config.rs | 138 +- .../litep2p/src/transport/tcp/connection.rs | 2716 +++---- client/litep2p/src/transport/tcp/mod.rs | 1949 +++-- client/litep2p/src/transport/tcp/substream.rs | 148 +- client/litep2p/src/transport/webrtc/config.rs | 28 +- .../src/transport/webrtc/connection.rs | 1526 ++-- client/litep2p/src/transport/webrtc/mod.rs | 1388 ++-- .../litep2p/src/transport/webrtc/opening.rs | 846 +- .../litep2p/src/transport/webrtc/substream.rs | 2690 +++--- client/litep2p/src/transport/webrtc/util.rs | 216 +- .../litep2p/src/transport/websocket/config.rs | 138 +- .../src/transport/websocket/connection.rs | 2646 +++--- client/litep2p/src/transport/websocket/mod.rs | 1350 ++-- .../litep2p/src/transport/websocket/stream.rs | 344 +- .../src/transport/websocket/substream.rs | 112 +- client/litep2p/src/types.rs | 64 +- client/litep2p/src/types/protocol.rs | 92 +- client/litep2p/src/utils/futures_stream.rs | 81 +- client/litep2p/src/yamux/control.rs | 372 +- client/litep2p/src/yamux/mod.rs | 4 +- client/network-types/Cargo.toml | 13 +- client/network-types/src/dilithium.rs | 5 +- .../network-types/src/multiaddr/protocol.rs | 51 +- client/network-types/src/peer_id.rs | 15 +- client/network/Cargo.toml | 2 +- client/network/src/config.rs | 15 +- client/network/src/lib.rs | 15 +- client/network/src/litep2p/mod.rs | 4 +- client/network/src/litep2p/service.rs | 13 +- .../src/litep2p/shim/request_response/mod.rs | 8 +- client/network/src/peer_store.rs | 6 +- client/network/src/protocol_controller.rs | 6 +- client/network/src/service/signature.rs | 5 +- node/src/command.rs | 4 +- 118 files changed, 42184 insertions(+), 44139 deletions(-) diff --git a/client/cli/Cargo.toml b/client/cli/Cargo.toml index dbee227a..2d844229 100644 --- a/client/cli/Cargo.toml +++ b/client/cli/Cargo.toml @@ -22,6 +22,8 @@ fdlimit = { workspace = true } futures = { workspace = true } hex = { workspace = true } itertools = { workspace = true } +litep2p.default-features = true +litep2p.workspace = true log = { workspace = true, default-features = true } names = { workspace = true } qp-dilithium-crypto = { workspace = true, features = ["full_crypto", "serde", "std"] } @@ -39,8 +41,6 @@ sc-mixnet.default-features = true sc-mixnet.workspace = true sc-network.default-features = true sc-network.workspace = true -litep2p.default-features = true -litep2p.workspace = true sc-service.default-features = false sc-service.workspace = true sc-telemetry.default-features = true diff --git a/client/cli/src/commands/generate_node_key.rs b/client/cli/src/commands/generate_node_key.rs index e9207daf..2e30c5e0 100644 --- a/client/cli/src/commands/generate_node_key.rs +++ b/client/cli/src/commands/generate_node_key.rs @@ -20,7 +20,7 @@ use crate::{build_network_key_dir_or_default, Error, NODE_KEY_DILITHIUM_FILE}; use clap::{Args, Parser}; -use litep2p::crypto::{PublicKey, dilithium::PublicKey as DilithiumPublicKey}; +use litep2p::crypto::{dilithium::PublicKey as DilithiumPublicKey, PublicKey}; use qp_rusty_crystals_dilithium::{ml_dsa_87::Keypair, SensitiveBytes32}; use sc_service::BasePath; use sp_core::blake2_256; diff --git a/client/cli/src/commands/inspect_node_key.rs b/client/cli/src/commands/inspect_node_key.rs index f0a00480..c624baea 100644 --- a/client/cli/src/commands/inspect_node_key.rs +++ b/client/cli/src/commands/inspect_node_key.rs @@ -20,7 +20,7 @@ use crate::Error; use clap::Parser; -use litep2p::crypto::{PublicKey, dilithium::PublicKey as DilithiumPublicKey}; +use litep2p::crypto::{dilithium::PublicKey as DilithiumPublicKey, PublicKey}; use qp_rusty_crystals_dilithium::ml_dsa_87::Keypair; use std::{ fs, diff --git a/client/litep2p/Cargo.toml b/client/litep2p/Cargo.toml index d712c436..561def30 100644 --- a/client/litep2p/Cargo.toml +++ b/client/litep2p/Cargo.toml @@ -1,10 +1,10 @@ [package] -name = "litep2p" description = "Post-quantum peer-to-peer networking library for Quantus Network" -version = "0.13.3" edition = "2021" license = "MIT" +name = "litep2p" repository = "https://github.com/Quantus-Network/chain" +version = "0.13.3" [build-dependencies] prost-build = "0.14" @@ -23,23 +23,24 @@ ip_network = { workspace = true } libc = "0.2.158" mockall = { workspace = true } multiaddr = { workspace = true } -multihash = { workspace = true, features = ["std", "multihash-impl", "identity", "sha2", "sha3", "blake2b"] } +multihash = { workspace = true, features = ["blake2b", "identity", "multihash-impl", "sha2", "sha3", "std"] } network-interface = "2.0.1" parking_lot = { workspace = true } pin-project = { workspace = true } prost = "0.13.5" -rand = { workspace = true, features = ["std", "std_rng", "getrandom"] } +rand = { workspace = true, features = ["getrandom", "std", "std_rng"] } serde = { workspace = true } sha2 = { workspace = true } simple-dns = "0.11.0" smallvec = { workspace = true } # Noise protocol with post-quantum pqxx pattern (ML-KEM 768 / FIPS 203) clatter = { workspace = true } +enum-display = "0.1.4" socket2 = { version = "0.5.9", features = ["all"] } thiserror = "2.0.12" -tokio = { workspace = true, features = ["rt", "net", "io-util", "time", "macros", "sync", "parking_lot"] } +tokio = { workspace = true, features = ["io-util", "macros", "net", "parking_lot", "rt", "sync", "time"] } tokio-stream = { workspace = true } -tokio-util = { workspace = true, features = ["compat", "io", "codec"] } +tokio-util = { workspace = true, features = ["codec", "compat", "io"] } tracing = { workspace = true, features = ["log"] } uint = "0.10.0" unsigned-varint = { version = "0.8.0", features = ["codec"] } @@ -48,7 +49,6 @@ x509-parser = { workspace = true } yamux = { workspace = true } yasna = { workspace = true } zeroize = { workspace = true } -enum-display = "0.1.4" # Post-quantum cryptography qp-rusty-crystals-dilithium = { workspace = true } @@ -57,10 +57,10 @@ qp-rusty-crystals-dilithium = { workspace = true } tokio-tungstenite = { version = "0.27.0", features = ["rustls-tls-native-roots", "url"], optional = true } # QUIC with post-quantum TLS -quinn = { workspace = true, features = ["rustls-aws-lc-rs", "runtime-tokio"], optional = true } +quinn = { workspace = true, features = ["runtime-tokio", "rustls-aws-lc-rs"], optional = true } rcgen = { workspace = true, features = ["aws_lc_rs"], optional = true } ring = { workspace = true, optional = true } -rustls = { workspace = true, features = ["std", "aws-lc-rs"], optional = true } +rustls = { workspace = true, features = ["aws-lc-rs", "std"], optional = true } rustls-post-quantum = { workspace = true, optional = true } webpki = { workspace = true, optional = true } @@ -71,17 +71,31 @@ str0m = { version = "0.11.1", optional = true } serde_millis = { version = "0.1", optional = true } [dev-dependencies] +futures_ringbuf = "0.4.0" +hex-literal = "1.0.0" quickcheck = "1.0.3" serde_json = { workspace = true, features = ["std"] } tracing-subscriber = { version = "0.3.20", features = ["env-filter"] } -futures_ringbuf = "0.4.0" -hex-literal = "1.0.0" [features] -default = ["websocket", "quic"] -websocket = ["dep:tokio-tungstenite"] -quic = ["dep:webpki", "dep:quinn", "dep:rustls", "dep:rustls-post-quantum", "dep:ring", "dep:rcgen"] +default = ["quic", "websocket"] +fuzz = [ + "bytes/serde", + "cid/serde", + "dep:serde_millis", + "multihash/serde", + "serde/derive", + "serde/rc", +] +quic = [ + "dep:quinn", + "dep:rcgen", + "dep:ring", + "dep:rustls", + "dep:rustls-post-quantum", + "dep:webpki", +] webrtc = ["dep:str0m"] -fuzz = ["serde/derive", "serde/rc", "bytes/serde", "dep:serde_millis", "cid/serde", "multihash/serde"] +websocket = ["dep:tokio-tungstenite"] # Compatibility feature - RSA support removed in favor of post-quantum Dilithium rsa = [] diff --git a/client/litep2p/build.rs b/client/litep2p/build.rs index bc719abc..103d7907 100644 --- a/client/litep2p/build.rs +++ b/client/litep2p/build.rs @@ -1,21 +1,21 @@ fn main() { - let mut config = prost_build::Config::new(); - // Configure Prost to add #[derive(Serialize, Deserialize)] to all generated structs - config.type_attribute( - ".", - "#[cfg_attr(feature = \"fuzz\", derive(serde::Serialize, serde::Deserialize))]", - ); - config - .compile_protos( - &[ - "src/schema/keys.proto", - "src/schema/noise.proto", - "src/schema/webrtc.proto", - "src/protocol/libp2p/schema/identify.proto", - "src/protocol/libp2p/schema/kademlia.proto", - "src/protocol/libp2p/schema/bitswap.proto", - ], - &["src"], - ) - .unwrap(); + let mut config = prost_build::Config::new(); + // Configure Prost to add #[derive(Serialize, Deserialize)] to all generated structs + config.type_attribute( + ".", + "#[cfg_attr(feature = \"fuzz\", derive(serde::Serialize, serde::Deserialize))]", + ); + config + .compile_protos( + &[ + "src/schema/keys.proto", + "src/schema/noise.proto", + "src/schema/webrtc.proto", + "src/protocol/libp2p/schema/identify.proto", + "src/protocol/libp2p/schema/kademlia.proto", + "src/protocol/libp2p/schema/bitswap.proto", + ], + &["src"], + ) + .unwrap(); } diff --git a/client/litep2p/src/addresses.rs b/client/litep2p/src/addresses.rs index af52e62f..207b2205 100644 --- a/client/litep2p/src/addresses.rs +++ b/client/litep2p/src/addresses.rs @@ -39,121 +39,118 @@ use crate::PeerId; /// - Users must ensure that the addresses are reachable from the network. #[derive(Debug, Clone)] pub struct PublicAddresses { - pub(crate) inner: Arc>>, - local_peer_id: PeerId, + pub(crate) inner: Arc>>, + local_peer_id: PeerId, } impl PublicAddresses { - /// Creates new [`PublicAddresses`] from the given peer ID. - pub(crate) fn new(local_peer_id: PeerId) -> Self { - Self { - inner: Arc::new(RwLock::new(HashSet::new())), - local_peer_id, - } - } - - /// Add a public address to the list of addresses. - /// - /// The address must contain the local peer ID, otherwise an error is returned. - /// In case the address does not contain any peer ID, it will be added. - /// - /// Returns true if the address was added, false if it was already present. - pub fn add_address(&self, address: Multiaddr) -> Result { - let address = ensure_local_peer(address, self.local_peer_id)?; - Ok(self.inner.write().insert(address)) - } - - /// Remove the exact public address. - /// - /// The provided address must contain the local peer ID. - pub fn remove_address(&self, address: &Multiaddr) -> bool { - self.inner.write().remove(address) - } - - /// Returns a vector of the available listen addresses. - pub fn get_addresses(&self) -> Vec { - self.inner.read().iter().cloned().collect() - } + /// Creates new [`PublicAddresses`] from the given peer ID. + pub(crate) fn new(local_peer_id: PeerId) -> Self { + Self { inner: Arc::new(RwLock::new(HashSet::new())), local_peer_id } + } + + /// Add a public address to the list of addresses. + /// + /// The address must contain the local peer ID, otherwise an error is returned. + /// In case the address does not contain any peer ID, it will be added. + /// + /// Returns true if the address was added, false if it was already present. + pub fn add_address(&self, address: Multiaddr) -> Result { + let address = ensure_local_peer(address, self.local_peer_id)?; + Ok(self.inner.write().insert(address)) + } + + /// Remove the exact public address. + /// + /// The provided address must contain the local peer ID. + pub fn remove_address(&self, address: &Multiaddr) -> bool { + self.inner.write().remove(address) + } + + /// Returns a vector of the available listen addresses. + pub fn get_addresses(&self) -> Vec { + self.inner.read().iter().cloned().collect() + } } /// Check if the address contains the local peer ID. /// /// If the address does not contain any peer ID, it will be added. fn ensure_local_peer( - mut address: Multiaddr, - local_peer_id: PeerId, + mut address: Multiaddr, + local_peer_id: PeerId, ) -> Result { - if address.is_empty() { - return Err(InsertionError::EmptyAddress); - } - - // Verify the peer ID from the address corresponds to the local peer ID. - if let Some(peer_id) = PeerId::try_from_multiaddr(&address) { - if peer_id != local_peer_id { - return Err(InsertionError::DifferentPeerId); - } - } else { - address.push(Protocol::P2p(local_peer_id.into())); - } - - Ok(address) + if address.is_empty() { + return Err(InsertionError::EmptyAddress); + } + + // Verify the peer ID from the address corresponds to the local peer ID. + if let Some(peer_id) = PeerId::try_from_multiaddr(&address) { + if peer_id != local_peer_id { + return Err(InsertionError::DifferentPeerId); + } + } else { + address.push(Protocol::P2p(local_peer_id.into())); + } + + Ok(address) } /// The error returned when an address cannot be inserted. #[derive(Debug, Clone, Copy, PartialEq, Eq)] pub enum InsertionError { - /// The address is empty. - EmptyAddress, - /// The address contains a different peer ID than the local peer ID. - DifferentPeerId, + /// The address is empty. + EmptyAddress, + /// The address contains a different peer ID than the local peer ID. + DifferentPeerId, } #[cfg(test)] mod tests { - use super::*; - use std::str::FromStr; - - #[test] - fn add_remove_contains() { - let peer_id = PeerId::random(); - let addresses = PublicAddresses::new(peer_id); - let address = Multiaddr::from_str("/dns/domain1.com/tcp/30333").unwrap(); - let peer_address = Multiaddr::from_str("/dns/domain1.com/tcp/30333") - .unwrap() - .with(Protocol::P2p(peer_id.into())); - - assert!(!addresses.get_addresses().contains(&address)); - - assert!(addresses.add_address(address.clone()).unwrap()); - // Adding the address a second time returns Ok(false). - assert!(!addresses.add_address(address.clone()).unwrap()); - - assert!(!addresses.get_addresses().contains(&address)); - assert!(addresses.get_addresses().contains(&peer_address)); - - addresses.remove_address(&peer_address); - assert!(!addresses.get_addresses().contains(&peer_address)); - } - - #[test] - fn get_addresses() { - let peer_id = PeerId::random(); - let addresses = PublicAddresses::new(peer_id); - let address1 = Multiaddr::from_str("/dns/domain1.com/tcp/30333").unwrap(); - let address2 = Multiaddr::from_str("/dns/domain2.com/tcp/30333").unwrap(); - // Addresses different than the local peer ID are ignored. - let address3 = Multiaddr::from_str( - "/dns/domain2.com/tcp/30333/p2p/12D3KooWSueCPH3puP2PcvqPJdNaDNF3jMZjtJtDiSy35pWrbt5h", - ) - .unwrap(); - - assert!(addresses.add_address(address1.clone()).unwrap()); - assert!(addresses.add_address(address2.clone()).unwrap()); - addresses.add_address(address3.clone()).unwrap_err(); - - let addresses = addresses.get_addresses(); - assert_eq!(addresses.len(), 2); - assert!(addresses.contains(&address1.with(Protocol::P2p(peer_id.into())))); - assert!(addresses.contains(&address2.with(Protocol::P2p(peer_id.into())))); - } + use super::*; + use std::str::FromStr; + + #[test] + fn add_remove_contains() { + let peer_id = PeerId::random(); + let addresses = PublicAddresses::new(peer_id); + let address = Multiaddr::from_str("/dns/domain1.com/tcp/30333").unwrap(); + let peer_address = Multiaddr::from_str("/dns/domain1.com/tcp/30333") + .unwrap() + .with(Protocol::P2p(peer_id.into())); + + assert!(!addresses.get_addresses().contains(&address)); + + assert!(addresses.add_address(address.clone()).unwrap()); + // Adding the address a second time returns Ok(false). + assert!(!addresses.add_address(address.clone()).unwrap()); + + assert!(!addresses.get_addresses().contains(&address)); + assert!(addresses.get_addresses().contains(&peer_address)); + + addresses.remove_address(&peer_address); + assert!(!addresses.get_addresses().contains(&peer_address)); + } + + #[test] + fn get_addresses() { + let peer_id = PeerId::random(); + let addresses = PublicAddresses::new(peer_id); + let address1 = Multiaddr::from_str("/dns/domain1.com/tcp/30333").unwrap(); + let address2 = Multiaddr::from_str("/dns/domain2.com/tcp/30333").unwrap(); + // Addresses different than the local peer ID are ignored. + let address3 = Multiaddr::from_str( + "/dns/domain2.com/tcp/30333/p2p/12D3KooWSueCPH3puP2PcvqPJdNaDNF3jMZjtJtDiSy35pWrbt5h", + ) + .unwrap(); + + assert!(addresses.add_address(address1.clone()).unwrap()); + assert!(addresses.add_address(address2.clone()).unwrap()); + addresses.add_address(address3.clone()).unwrap_err(); + + let addresses = addresses.get_addresses(); + assert_eq!(addresses.len(), 2); + assert!(addresses.contains(&address1.with(Protocol::P2p(peer_id.into())))); + assert!(addresses.contains(&address2.with(Protocol::P2p(peer_id.into())))); + } } diff --git a/client/litep2p/src/bandwidth.rs b/client/litep2p/src/bandwidth.rs index 4895ad20..aa28dfbd 100644 --- a/client/litep2p/src/bandwidth.rs +++ b/client/litep2p/src/bandwidth.rs @@ -21,18 +21,18 @@ //! Bandwidth sinks for metering inbound/outbound bytes. use std::sync::{ - atomic::{AtomicUsize, Ordering}, - Arc, + atomic::{AtomicUsize, Ordering}, + Arc, }; /// Inner bandwidth sink #[derive(Debug)] struct InnerBandwidthSink { - /// Number of inbound bytes. - inbound: AtomicUsize, + /// Number of inbound bytes. + inbound: AtomicUsize, - /// Number of outbound bytes. - outbound: AtomicUsize, + /// Number of outbound bytes. + outbound: AtomicUsize, } /// Bandwidth sink which provides metering for inbound/outbound byte usage. @@ -44,47 +44,47 @@ struct InnerBandwidthSink { pub struct BandwidthSink(Arc); impl BandwidthSink { - /// Create new [`BandwidthSink`]. - pub(crate) fn new() -> Self { - Self(Arc::new(InnerBandwidthSink { - inbound: AtomicUsize::new(0usize), - outbound: AtomicUsize::new(0usize), - })) - } + /// Create new [`BandwidthSink`]. + pub(crate) fn new() -> Self { + Self(Arc::new(InnerBandwidthSink { + inbound: AtomicUsize::new(0usize), + outbound: AtomicUsize::new(0usize), + })) + } - /// Increase the amount of inbound bytes. - pub(crate) fn increase_inbound(&self, bytes: usize) { - let _ = self.0.inbound.fetch_add(bytes, Ordering::Relaxed); - } + /// Increase the amount of inbound bytes. + pub(crate) fn increase_inbound(&self, bytes: usize) { + let _ = self.0.inbound.fetch_add(bytes, Ordering::Relaxed); + } - /// Increse the amount of outbound bytes. - pub(crate) fn increase_outbound(&self, bytes: usize) { - let _ = self.0.outbound.fetch_add(bytes, Ordering::Relaxed); - } + /// Increse the amount of outbound bytes. + pub(crate) fn increase_outbound(&self, bytes: usize) { + let _ = self.0.outbound.fetch_add(bytes, Ordering::Relaxed); + } - /// Get total the number of bytes received. - pub fn inbound(&self) -> usize { - self.0.inbound.load(Ordering::Relaxed) - } + /// Get total the number of bytes received. + pub fn inbound(&self) -> usize { + self.0.inbound.load(Ordering::Relaxed) + } - /// Get total the nubmer of bytes sent. - pub fn outbound(&self) -> usize { - self.0.outbound.load(Ordering::Relaxed) - } + /// Get total the nubmer of bytes sent. + pub fn outbound(&self) -> usize { + self.0.outbound.load(Ordering::Relaxed) + } } #[cfg(test)] mod tests { - use super::*; + use super::*; - #[test] - fn verify_bandwidth() { - let sink = BandwidthSink::new(); + #[test] + fn verify_bandwidth() { + let sink = BandwidthSink::new(); - sink.increase_inbound(1337usize); - sink.increase_outbound(1338usize); + sink.increase_inbound(1337usize); + sink.increase_outbound(1338usize); - assert_eq!(sink.inbound(), 1337usize); - assert_eq!(sink.outbound(), 1338usize); - } + assert_eq!(sink.inbound(), 1337usize); + assert_eq!(sink.outbound(), 1338usize); + } } diff --git a/client/litep2p/src/codec/identity.rs b/client/litep2p/src/codec/identity.rs index f3e47716..91c199a9 100644 --- a/client/litep2p/src/codec/identity.rs +++ b/client/litep2p/src/codec/identity.rs @@ -27,109 +27,106 @@ use tokio_util::codec::{Decoder, Encoder}; /// Identity codec. pub struct Identity { - payload_len: usize, + payload_len: usize, } impl Identity { - /// Create new [`Identity`] codec. - pub fn new(payload_len: usize) -> Self { - assert!(payload_len != 0); - - Self { payload_len } - } - - /// Encode `payload` using identity codec. - pub fn encode>(payload: T) -> crate::Result> { - let payload: Bytes = payload.into(); - Ok(payload.into()) - } + /// Create new [`Identity`] codec. + pub fn new(payload_len: usize) -> Self { + assert!(payload_len != 0); + + Self { payload_len } + } + + /// Encode `payload` using identity codec. + pub fn encode>(payload: T) -> crate::Result> { + let payload: Bytes = payload.into(); + Ok(payload.into()) + } } impl Decoder for Identity { - type Item = BytesMut; - type Error = Error; + type Item = BytesMut; + type Error = Error; - fn decode(&mut self, src: &mut BytesMut) -> Result, Self::Error> { - if src.is_empty() || src.len() < self.payload_len { - return Ok(None); - } + fn decode(&mut self, src: &mut BytesMut) -> Result, Self::Error> { + if src.is_empty() || src.len() < self.payload_len { + return Ok(None); + } - Ok(Some(src.split_to(self.payload_len))) - } + Ok(Some(src.split_to(self.payload_len))) + } } impl Encoder for Identity { - type Error = Error; + type Error = Error; - fn encode(&mut self, item: Bytes, dst: &mut bytes::BytesMut) -> Result<(), Self::Error> { - if item.len() > self.payload_len || item.is_empty() { - return Err(Error::InvalidData); - } + fn encode(&mut self, item: Bytes, dst: &mut bytes::BytesMut) -> Result<(), Self::Error> { + if item.len() > self.payload_len || item.is_empty() { + return Err(Error::InvalidData); + } - dst.put_slice(item.as_ref()); - Ok(()) - } + dst.put_slice(item.as_ref()); + Ok(()) + } } #[cfg(test)] mod tests { - use super::*; - - #[test] - fn encoding_works() { - let mut codec = Identity::new(48); - let mut out_buf = BytesMut::with_capacity(32); - let bytes = Bytes::from(vec![0u8; 48]); - - assert!(codec.encode(bytes.clone(), &mut out_buf).is_ok()); - assert_eq!(out_buf.freeze(), bytes); - } - - #[test] - fn decoding_works() { - let mut codec = Identity::new(64); - let bytes = vec![3u8; 64]; - let copy = bytes.clone(); - let mut bytes = BytesMut::from(&bytes[..]); - - let decoded = codec.decode(&mut bytes).unwrap().unwrap(); - assert_eq!(decoded, copy); - } - - #[test] - fn decoding_smaller_payloads() { - let mut codec = Identity::new(100); - let bytes = [3u8; 64]; - let mut bytes = BytesMut::from(&bytes[..]); - - assert!(codec.decode(&mut bytes).unwrap().is_none()); - } - - #[test] - fn empty_encode() { - let mut codec = Identity::new(32); - let mut out_buf = BytesMut::with_capacity(32); - assert!(codec.encode(Bytes::new(), &mut out_buf).is_err()); - } - - #[test] - fn decode_encode() { - let mut codec = Identity::new(32); - assert!(codec.decode(&mut BytesMut::new()).unwrap().is_none()); - } - - #[test] - fn direct_encoding_works() { - assert_eq!( - Identity::encode(vec![1, 3, 3, 7]).unwrap(), - vec![1, 3, 3, 7] - ); - } - - #[test] - #[should_panic] - #[cfg(debug_assertions)] - fn empty_identity_codec() { - let _codec = Identity::new(0usize); - } + use super::*; + + #[test] + fn encoding_works() { + let mut codec = Identity::new(48); + let mut out_buf = BytesMut::with_capacity(32); + let bytes = Bytes::from(vec![0u8; 48]); + + assert!(codec.encode(bytes.clone(), &mut out_buf).is_ok()); + assert_eq!(out_buf.freeze(), bytes); + } + + #[test] + fn decoding_works() { + let mut codec = Identity::new(64); + let bytes = vec![3u8; 64]; + let copy = bytes.clone(); + let mut bytes = BytesMut::from(&bytes[..]); + + let decoded = codec.decode(&mut bytes).unwrap().unwrap(); + assert_eq!(decoded, copy); + } + + #[test] + fn decoding_smaller_payloads() { + let mut codec = Identity::new(100); + let bytes = [3u8; 64]; + let mut bytes = BytesMut::from(&bytes[..]); + + assert!(codec.decode(&mut bytes).unwrap().is_none()); + } + + #[test] + fn empty_encode() { + let mut codec = Identity::new(32); + let mut out_buf = BytesMut::with_capacity(32); + assert!(codec.encode(Bytes::new(), &mut out_buf).is_err()); + } + + #[test] + fn decode_encode() { + let mut codec = Identity::new(32); + assert!(codec.decode(&mut BytesMut::new()).unwrap().is_none()); + } + + #[test] + fn direct_encoding_works() { + assert_eq!(Identity::encode(vec![1, 3, 3, 7]).unwrap(), vec![1, 3, 3, 7]); + } + + #[test] + #[should_panic] + #[cfg(debug_assertions)] + fn empty_identity_codec() { + let _codec = Identity::new(0usize); + } } diff --git a/client/litep2p/src/codec/mod.rs b/client/litep2p/src/codec/mod.rs index 3604c023..d9e41129 100644 --- a/client/litep2p/src/codec/mod.rs +++ b/client/litep2p/src/codec/mod.rs @@ -26,12 +26,12 @@ pub mod unsigned_varint; /// Supported protocol codecs. #[derive(Debug, Copy, Clone)] pub enum ProtocolCodec { - /// Identity codec where the argument denotes the payload size. - Identity(usize), + /// Identity codec where the argument denotes the payload size. + Identity(usize), - /// Unsigned varint where the argument denotes the maximum message size, if specified. - UnsignedVarint(Option), + /// Unsigned varint where the argument denotes the maximum message size, if specified. + UnsignedVarint(Option), - /// Protocol doens't need framing for its messages or is using a custom codec. - Unspecified, + /// Protocol doens't need framing for its messages or is using a custom codec. + Unspecified, } diff --git a/client/litep2p/src/codec/unsigned_varint.rs b/client/litep2p/src/codec/unsigned_varint.rs index 566abd0b..f1722481 100644 --- a/client/litep2p/src/codec/unsigned_varint.rs +++ b/client/litep2p/src/codec/unsigned_varint.rs @@ -28,114 +28,114 @@ use unsigned_varint::codec::UviBytes; /// Unsigned varint codec. pub struct UnsignedVarint { - codec: UviBytes, + codec: UviBytes, } impl UnsignedVarint { - /// Create new [`UnsignedVarint`] codec. - pub fn new(max_size: Option) -> Self { - let mut codec = UviBytes::::default(); + /// Create new [`UnsignedVarint`] codec. + pub fn new(max_size: Option) -> Self { + let mut codec = UviBytes::::default(); - if let Some(max_size) = max_size { - codec.set_max_len(max_size); - } + if let Some(max_size) = max_size { + codec.set_max_len(max_size); + } - Self { codec } - } + Self { codec } + } - /// Set maximum size for encoded/decodes values. - pub fn with_max_size(max_size: usize) -> Self { - let mut codec = UviBytes::::default(); - codec.set_max_len(max_size); + /// Set maximum size for encoded/decodes values. + pub fn with_max_size(max_size: usize) -> Self { + let mut codec = UviBytes::::default(); + codec.set_max_len(max_size); - Self { codec } - } + Self { codec } + } - /// Encode `payload` using `unsigned-varint`. - pub fn encode>(payload: T) -> crate::Result> { - let payload: Bytes = payload.into(); + /// Encode `payload` using `unsigned-varint`. + pub fn encode>(payload: T) -> crate::Result> { + let payload: Bytes = payload.into(); - assert!(payload.len() <= u32::MAX as usize); + assert!(payload.len() <= u32::MAX as usize); - let mut bytes = BytesMut::with_capacity(payload.len() + 4); - let mut codec = Self::new(None); - codec.encode(payload, &mut bytes)?; + let mut bytes = BytesMut::with_capacity(payload.len() + 4); + let mut codec = Self::new(None); + codec.encode(payload, &mut bytes)?; - Ok(bytes.into()) - } + Ok(bytes.into()) + } - /// Decode `payload` into `BytesMut`. - pub fn decode(payload: &mut BytesMut) -> crate::Result { - UviBytes::::default().decode(payload)?.ok_or(Error::InvalidData) - } + /// Decode `payload` into `BytesMut`. + pub fn decode(payload: &mut BytesMut) -> crate::Result { + UviBytes::::default().decode(payload)?.ok_or(Error::InvalidData) + } } impl Decoder for UnsignedVarint { - type Item = BytesMut; - type Error = Error; + type Item = BytesMut; + type Error = Error; - fn decode(&mut self, src: &mut BytesMut) -> Result, Self::Error> { - self.codec.decode(src).map_err(From::from) - } + fn decode(&mut self, src: &mut BytesMut) -> Result, Self::Error> { + self.codec.decode(src).map_err(From::from) + } } impl Encoder for UnsignedVarint { - type Error = Error; + type Error = Error; - fn encode(&mut self, item: Bytes, dst: &mut bytes::BytesMut) -> Result<(), Self::Error> { - self.codec.encode(item, dst).map_err(From::from) - } + fn encode(&mut self, item: Bytes, dst: &mut bytes::BytesMut) -> Result<(), Self::Error> { + self.codec.encode(item, dst).map_err(From::from) + } } #[cfg(test)] mod tests { - use super::{Bytes, BytesMut, UnsignedVarint}; - - #[test] - fn max_size_respected() { - let mut codec = UnsignedVarint::with_max_size(1024); - - { - use tokio_util::codec::Encoder; - - let bytes_to_encode: Bytes = vec![0u8; 1024].into(); - let mut out_bytes = BytesMut::with_capacity(2048); - assert!(codec.encode(bytes_to_encode, &mut out_bytes).is_ok()); - } - - { - use tokio_util::codec::Encoder; - - let bytes_to_encode: Bytes = vec![1u8; 1025].into(); - let mut out_bytes = BytesMut::with_capacity(2048); - assert!(codec.encode(bytes_to_encode, &mut out_bytes).is_err()); - } - } - - #[test] - fn encode_decode_works() { - let encoded1 = UnsignedVarint::encode(vec![0u8; 512]).unwrap(); - let mut encoded2 = { - use tokio_util::codec::Encoder; - - let mut codec = UnsignedVarint::with_max_size(512); - let bytes_to_encode: Bytes = vec![0u8; 512].into(); - let mut out_bytes = BytesMut::with_capacity(2048); - codec.encode(bytes_to_encode, &mut out_bytes).unwrap(); - out_bytes - }; - - assert_eq!(encoded1, encoded2); - - let decoded1 = UnsignedVarint::decode(&mut encoded2).unwrap(); - let decoded2 = { - use tokio_util::codec::Decoder; - - let mut codec = UnsignedVarint::with_max_size(512); - let mut encoded1 = BytesMut::from(&encoded1[..]); - codec.decode(&mut encoded1).unwrap().unwrap() - }; - - assert_eq!(decoded1, decoded2); - } + use super::{Bytes, BytesMut, UnsignedVarint}; + + #[test] + fn max_size_respected() { + let mut codec = UnsignedVarint::with_max_size(1024); + + { + use tokio_util::codec::Encoder; + + let bytes_to_encode: Bytes = vec![0u8; 1024].into(); + let mut out_bytes = BytesMut::with_capacity(2048); + assert!(codec.encode(bytes_to_encode, &mut out_bytes).is_ok()); + } + + { + use tokio_util::codec::Encoder; + + let bytes_to_encode: Bytes = vec![1u8; 1025].into(); + let mut out_bytes = BytesMut::with_capacity(2048); + assert!(codec.encode(bytes_to_encode, &mut out_bytes).is_err()); + } + } + + #[test] + fn encode_decode_works() { + let encoded1 = UnsignedVarint::encode(vec![0u8; 512]).unwrap(); + let mut encoded2 = { + use tokio_util::codec::Encoder; + + let mut codec = UnsignedVarint::with_max_size(512); + let bytes_to_encode: Bytes = vec![0u8; 512].into(); + let mut out_bytes = BytesMut::with_capacity(2048); + codec.encode(bytes_to_encode, &mut out_bytes).unwrap(); + out_bytes + }; + + assert_eq!(encoded1, encoded2); + + let decoded1 = UnsignedVarint::decode(&mut encoded2).unwrap(); + let decoded2 = { + use tokio_util::codec::Decoder; + + let mut codec = UnsignedVarint::with_max_size(512); + let mut encoded1 = BytesMut::from(&encoded1[..]); + codec.decode(&mut encoded1).unwrap().unwrap() + }; + + assert_eq!(decoded1, decoded2); + } } diff --git a/client/litep2p/src/config.rs b/client/litep2p/src/config.rs index 5a7d4479..79bc9473 100644 --- a/client/litep2p/src/config.rs +++ b/client/litep2p/src/config.rs @@ -21,19 +21,19 @@ //! [`Litep2p`](`crate::Litep2p`) configuration. use crate::{ - crypto::dilithium::Keypair, - executor::{DefaultExecutor, Executor}, - protocol::{ - libp2p::{bitswap, identify, kademlia, ping}, - mdns::Config as MdnsConfig, - notification, request_response, UserProtocol, - }, - transport::{ - manager::limits::ConnectionLimitsConfig, tcp::config::Config as TcpConfig, - KEEP_ALIVE_TIMEOUT, MAX_PARALLEL_DIALS, - }, - types::protocol::ProtocolName, - PeerId, + crypto::dilithium::Keypair, + executor::{DefaultExecutor, Executor}, + protocol::{ + libp2p::{bitswap, identify, kademlia, ping}, + mdns::Config as MdnsConfig, + notification, request_response, UserProtocol, + }, + transport::{ + manager::limits::ConnectionLimitsConfig, tcp::config::Config as TcpConfig, + KEEP_ALIVE_TIMEOUT, MAX_PARALLEL_DIALS, + }, + types::protocol::ProtocolName, + PeerId, }; #[cfg(feature = "quic")] @@ -50,339 +50,339 @@ use std::{collections::HashMap, sync::Arc, time::Duration}; /// Connection role. #[derive(Debug, Copy, Clone)] pub enum Role { - /// Dialer. - Dialer, + /// Dialer. + Dialer, - /// Listener. - Listener, + /// Listener. + Listener, } impl From for crate::yamux::Mode { - fn from(value: Role) -> Self { - match value { - Role::Dialer => crate::yamux::Mode::Client, - Role::Listener => crate::yamux::Mode::Server, - } - } + fn from(value: Role) -> Self { + match value { + Role::Dialer => crate::yamux::Mode::Client, + Role::Listener => crate::yamux::Mode::Server, + } + } } /// Configuration builder for [`Litep2p`](`crate::Litep2p`). pub struct ConfigBuilder { - /// TCP transport configuration. - tcp: Option, + /// TCP transport configuration. + tcp: Option, - /// QUIC transport config. - #[cfg(feature = "quic")] - quic: Option, + /// QUIC transport config. + #[cfg(feature = "quic")] + quic: Option, - /// WebRTC transport config. - #[cfg(feature = "webrtc")] - webrtc: Option, + /// WebRTC transport config. + #[cfg(feature = "webrtc")] + webrtc: Option, - /// WebSocket transport config. - #[cfg(feature = "websocket")] - websocket: Option, + /// WebSocket transport config. + #[cfg(feature = "websocket")] + websocket: Option, - /// Keypair. - keypair: Option, + /// Keypair. + keypair: Option, - /// Ping protocol config. - ping: Option, + /// Ping protocol config. + ping: Option, - /// Identify protocol config. - identify: Option, + /// Identify protocol config. + identify: Option, - /// Kademlia protocol config. - kademlia: Vec, + /// Kademlia protocol config. + kademlia: Vec, - /// Bitswap protocol config. - bitswap: Option, + /// Bitswap protocol config. + bitswap: Option, - /// Notification protocols. - notification_protocols: HashMap, + /// Notification protocols. + notification_protocols: HashMap, - /// Request-response protocols. - request_response_protocols: HashMap, + /// Request-response protocols. + request_response_protocols: HashMap, - /// User protocols. - user_protocols: HashMap>, + /// User protocols. + user_protocols: HashMap>, - /// mDNS configuration. - mdns: Option, + /// mDNS configuration. + mdns: Option, - /// Known addresess. - known_addresses: Vec<(PeerId, Vec)>, + /// Known addresess. + known_addresses: Vec<(PeerId, Vec)>, - /// Executor for running futures. - executor: Option>, + /// Executor for running futures. + executor: Option>, - /// Maximum number of parallel dial attempts. - max_parallel_dials: usize, + /// Maximum number of parallel dial attempts. + max_parallel_dials: usize, - /// Connection limits config. - connection_limits: ConnectionLimitsConfig, + /// Connection limits config. + connection_limits: ConnectionLimitsConfig, - /// Close the connection if no substreams are open within this time frame. - keep_alive_timeout: Duration, + /// Close the connection if no substreams are open within this time frame. + keep_alive_timeout: Duration, - /// Use system's DNS config. - use_system_dns_config: bool, + /// Use system's DNS config. + use_system_dns_config: bool, } impl Default for ConfigBuilder { - fn default() -> Self { - Self::new() - } + fn default() -> Self { + Self::new() + } } impl ConfigBuilder { - /// Create empty [`ConfigBuilder`]. - pub fn new() -> Self { - Self { - tcp: None, - #[cfg(feature = "quic")] - quic: None, - #[cfg(feature = "webrtc")] - webrtc: None, - #[cfg(feature = "websocket")] - websocket: None, - keypair: None, - ping: None, - identify: None, - kademlia: Vec::new(), - bitswap: None, - mdns: None, - executor: None, - max_parallel_dials: MAX_PARALLEL_DIALS, - user_protocols: HashMap::new(), - notification_protocols: HashMap::new(), - request_response_protocols: HashMap::new(), - known_addresses: Vec::new(), - connection_limits: ConnectionLimitsConfig::default(), - keep_alive_timeout: KEEP_ALIVE_TIMEOUT, - use_system_dns_config: false, - } - } - - /// Add TCP transport configuration, enabling the transport. - pub fn with_tcp(mut self, config: TcpConfig) -> Self { - self.tcp = Some(config); - self - } - - /// Add QUIC transport configuration, enabling the transport. - #[cfg(feature = "quic")] - pub fn with_quic(mut self, config: QuicConfig) -> Self { - self.quic = Some(config); - self - } - - /// Add WebRTC transport configuration, enabling the transport. - #[cfg(feature = "webrtc")] - pub fn with_webrtc(mut self, config: WebRtcConfig) -> Self { - self.webrtc = Some(config); - self - } - - /// Add WebSocket transport configuration, enabling the transport. - #[cfg(feature = "websocket")] - pub fn with_websocket(mut self, config: WebSocketConfig) -> Self { - self.websocket = Some(config); - self - } - - /// Add keypair. - /// - /// If no keypair is specified, litep2p creates a new keypair. - pub fn with_keypair(mut self, keypair: Keypair) -> Self { - self.keypair = Some(keypair); - self - } - - /// Enable notification protocol. - pub fn with_notification_protocol(mut self, config: notification::Config) -> Self { - self.notification_protocols.insert(config.protocol_name().clone(), config); - self - } - - /// Enable IPFS Ping protocol. - pub fn with_libp2p_ping(mut self, config: ping::Config) -> Self { - self.ping = Some(config); - self - } - - /// Enable IPFS Identify protocol. - pub fn with_libp2p_identify(mut self, config: identify::Config) -> Self { - self.identify = Some(config); - self - } - - /// Enable IPFS Kademlia protocol. - pub fn with_libp2p_kademlia(mut self, config: kademlia::Config) -> Self { - self.kademlia.push(config); - self - } - - /// Enable IPFS Bitswap protocol. - pub fn with_libp2p_bitswap(mut self, config: bitswap::Config) -> Self { - self.bitswap = Some(config); - self - } - - /// Enable request-response protocol. - pub fn with_request_response_protocol(mut self, config: request_response::Config) -> Self { - self.request_response_protocols.insert(config.protocol_name().clone(), config); - self - } - - /// Enable user protocol. - pub fn with_user_protocol(mut self, protocol: Box) -> Self { - self.user_protocols.insert(protocol.protocol(), protocol); - self - } - - /// Enable mDNS for peer discoveries in the local network. - pub fn with_mdns(mut self, config: MdnsConfig) -> Self { - self.mdns = Some(config); - self - } - - /// Add known address(es) for one or more peers. - pub fn with_known_addresses( - mut self, - addresses: impl Iterator)>, - ) -> Self { - self.known_addresses = addresses.collect(); - self - } - - /// Add executor for running futures spawned by `litep2p`. - /// - /// If no executor is specified, `litep2p` defaults to calling `tokio::spawn()`. - pub fn with_executor(mut self, executor: Arc) -> Self { - self.executor = Some(executor); - self - } - - /// How many addresses should litep2p attempt to dial in parallel. - /// - /// The provided number is clamped to a minimum of 1. - pub fn with_max_parallel_dials(mut self, max_parallel_dials: usize) -> Self { - self.max_parallel_dials = max_parallel_dials.max(1); - self - } - - /// Set connection limits configuration. - pub fn with_connection_limits(mut self, config: ConnectionLimitsConfig) -> Self { - self.connection_limits = config; - self - } - - /// Set keep alive timeout for connections. - pub fn with_keep_alive_timeout(mut self, timeout: Duration) -> Self { - self.keep_alive_timeout = timeout; - self - } - - /// Set DNS resolver according to system configuration instead of default (Google). - pub fn with_system_resolver(mut self) -> Self { - self.use_system_dns_config = true; - self - } - - /// Build [`Litep2pConfig`]. - pub fn build(mut self) -> Litep2pConfig { - let keypair = match self.keypair { - Some(keypair) => keypair, - None => Keypair::generate(), - }; - - Litep2pConfig { - keypair, - tcp: self.tcp.take(), - mdns: self.mdns.take(), - #[cfg(feature = "quic")] - quic: self.quic.take(), - #[cfg(feature = "webrtc")] - webrtc: self.webrtc.take(), - #[cfg(feature = "websocket")] - websocket: self.websocket.take(), - ping: self.ping.take(), - identify: self.identify.take(), - kademlia: self.kademlia, - bitswap: self.bitswap.take(), - max_parallel_dials: self.max_parallel_dials, - executor: self.executor.map_or(Arc::new(DefaultExecutor {}), |executor| executor), - user_protocols: self.user_protocols, - notification_protocols: self.notification_protocols, - request_response_protocols: self.request_response_protocols, - known_addresses: self.known_addresses, - connection_limits: self.connection_limits, - keep_alive_timeout: self.keep_alive_timeout, - use_system_dns_config: self.use_system_dns_config, - } - } + /// Create empty [`ConfigBuilder`]. + pub fn new() -> Self { + Self { + tcp: None, + #[cfg(feature = "quic")] + quic: None, + #[cfg(feature = "webrtc")] + webrtc: None, + #[cfg(feature = "websocket")] + websocket: None, + keypair: None, + ping: None, + identify: None, + kademlia: Vec::new(), + bitswap: None, + mdns: None, + executor: None, + max_parallel_dials: MAX_PARALLEL_DIALS, + user_protocols: HashMap::new(), + notification_protocols: HashMap::new(), + request_response_protocols: HashMap::new(), + known_addresses: Vec::new(), + connection_limits: ConnectionLimitsConfig::default(), + keep_alive_timeout: KEEP_ALIVE_TIMEOUT, + use_system_dns_config: false, + } + } + + /// Add TCP transport configuration, enabling the transport. + pub fn with_tcp(mut self, config: TcpConfig) -> Self { + self.tcp = Some(config); + self + } + + /// Add QUIC transport configuration, enabling the transport. + #[cfg(feature = "quic")] + pub fn with_quic(mut self, config: QuicConfig) -> Self { + self.quic = Some(config); + self + } + + /// Add WebRTC transport configuration, enabling the transport. + #[cfg(feature = "webrtc")] + pub fn with_webrtc(mut self, config: WebRtcConfig) -> Self { + self.webrtc = Some(config); + self + } + + /// Add WebSocket transport configuration, enabling the transport. + #[cfg(feature = "websocket")] + pub fn with_websocket(mut self, config: WebSocketConfig) -> Self { + self.websocket = Some(config); + self + } + + /// Add keypair. + /// + /// If no keypair is specified, litep2p creates a new keypair. + pub fn with_keypair(mut self, keypair: Keypair) -> Self { + self.keypair = Some(keypair); + self + } + + /// Enable notification protocol. + pub fn with_notification_protocol(mut self, config: notification::Config) -> Self { + self.notification_protocols.insert(config.protocol_name().clone(), config); + self + } + + /// Enable IPFS Ping protocol. + pub fn with_libp2p_ping(mut self, config: ping::Config) -> Self { + self.ping = Some(config); + self + } + + /// Enable IPFS Identify protocol. + pub fn with_libp2p_identify(mut self, config: identify::Config) -> Self { + self.identify = Some(config); + self + } + + /// Enable IPFS Kademlia protocol. + pub fn with_libp2p_kademlia(mut self, config: kademlia::Config) -> Self { + self.kademlia.push(config); + self + } + + /// Enable IPFS Bitswap protocol. + pub fn with_libp2p_bitswap(mut self, config: bitswap::Config) -> Self { + self.bitswap = Some(config); + self + } + + /// Enable request-response protocol. + pub fn with_request_response_protocol(mut self, config: request_response::Config) -> Self { + self.request_response_protocols.insert(config.protocol_name().clone(), config); + self + } + + /// Enable user protocol. + pub fn with_user_protocol(mut self, protocol: Box) -> Self { + self.user_protocols.insert(protocol.protocol(), protocol); + self + } + + /// Enable mDNS for peer discoveries in the local network. + pub fn with_mdns(mut self, config: MdnsConfig) -> Self { + self.mdns = Some(config); + self + } + + /// Add known address(es) for one or more peers. + pub fn with_known_addresses( + mut self, + addresses: impl Iterator)>, + ) -> Self { + self.known_addresses = addresses.collect(); + self + } + + /// Add executor for running futures spawned by `litep2p`. + /// + /// If no executor is specified, `litep2p` defaults to calling `tokio::spawn()`. + pub fn with_executor(mut self, executor: Arc) -> Self { + self.executor = Some(executor); + self + } + + /// How many addresses should litep2p attempt to dial in parallel. + /// + /// The provided number is clamped to a minimum of 1. + pub fn with_max_parallel_dials(mut self, max_parallel_dials: usize) -> Self { + self.max_parallel_dials = max_parallel_dials.max(1); + self + } + + /// Set connection limits configuration. + pub fn with_connection_limits(mut self, config: ConnectionLimitsConfig) -> Self { + self.connection_limits = config; + self + } + + /// Set keep alive timeout for connections. + pub fn with_keep_alive_timeout(mut self, timeout: Duration) -> Self { + self.keep_alive_timeout = timeout; + self + } + + /// Set DNS resolver according to system configuration instead of default (Google). + pub fn with_system_resolver(mut self) -> Self { + self.use_system_dns_config = true; + self + } + + /// Build [`Litep2pConfig`]. + pub fn build(mut self) -> Litep2pConfig { + let keypair = match self.keypair { + Some(keypair) => keypair, + None => Keypair::generate(), + }; + + Litep2pConfig { + keypair, + tcp: self.tcp.take(), + mdns: self.mdns.take(), + #[cfg(feature = "quic")] + quic: self.quic.take(), + #[cfg(feature = "webrtc")] + webrtc: self.webrtc.take(), + #[cfg(feature = "websocket")] + websocket: self.websocket.take(), + ping: self.ping.take(), + identify: self.identify.take(), + kademlia: self.kademlia, + bitswap: self.bitswap.take(), + max_parallel_dials: self.max_parallel_dials, + executor: self.executor.map_or(Arc::new(DefaultExecutor {}), |executor| executor), + user_protocols: self.user_protocols, + notification_protocols: self.notification_protocols, + request_response_protocols: self.request_response_protocols, + known_addresses: self.known_addresses, + connection_limits: self.connection_limits, + keep_alive_timeout: self.keep_alive_timeout, + use_system_dns_config: self.use_system_dns_config, + } + } } /// Configuration for [`Litep2p`](`crate::Litep2p`). pub struct Litep2pConfig { - // TCP transport configuration. - pub(crate) tcp: Option, + // TCP transport configuration. + pub(crate) tcp: Option, - /// QUIC transport config. - #[cfg(feature = "quic")] - pub(crate) quic: Option, + /// QUIC transport config. + #[cfg(feature = "quic")] + pub(crate) quic: Option, - /// WebRTC transport config. - #[cfg(feature = "webrtc")] - pub(crate) webrtc: Option, + /// WebRTC transport config. + #[cfg(feature = "webrtc")] + pub(crate) webrtc: Option, - /// WebSocket transport config. - #[cfg(feature = "websocket")] - pub(crate) websocket: Option, + /// WebSocket transport config. + #[cfg(feature = "websocket")] + pub(crate) websocket: Option, - /// Keypair. - pub(crate) keypair: Keypair, + /// Keypair. + pub(crate) keypair: Keypair, - /// Ping protocol configuration, if enabled. - pub(crate) ping: Option, + /// Ping protocol configuration, if enabled. + pub(crate) ping: Option, - /// Identify protocol configuration, if enabled. - pub(crate) identify: Option, + /// Identify protocol configuration, if enabled. + pub(crate) identify: Option, - /// Kademlia protocol configuration, if enabled. - pub(crate) kademlia: Vec, + /// Kademlia protocol configuration, if enabled. + pub(crate) kademlia: Vec, - /// Bitswap protocol configuration, if enabled. - pub(crate) bitswap: Option, + /// Bitswap protocol configuration, if enabled. + pub(crate) bitswap: Option, - /// Notification protocols. - pub(crate) notification_protocols: HashMap, + /// Notification protocols. + pub(crate) notification_protocols: HashMap, - /// Request-response protocols. - pub(crate) request_response_protocols: HashMap, + /// Request-response protocols. + pub(crate) request_response_protocols: HashMap, - /// User protocols. - pub(crate) user_protocols: HashMap>, + /// User protocols. + pub(crate) user_protocols: HashMap>, - /// mDNS configuration. - pub(crate) mdns: Option, + /// mDNS configuration. + pub(crate) mdns: Option, - /// Executor. - pub(crate) executor: Arc, + /// Executor. + pub(crate) executor: Arc, - /// Maximum number of parallel dial attempts. - pub(crate) max_parallel_dials: usize, + /// Maximum number of parallel dial attempts. + pub(crate) max_parallel_dials: usize, - /// Known addresses. - pub(crate) known_addresses: Vec<(PeerId, Vec)>, + /// Known addresses. + pub(crate) known_addresses: Vec<(PeerId, Vec)>, - /// Connection limits config. - pub(crate) connection_limits: ConnectionLimitsConfig, + /// Connection limits config. + pub(crate) connection_limits: ConnectionLimitsConfig, - /// Close the connection if no substreams are open within this time frame. - pub(crate) keep_alive_timeout: Duration, + /// Close the connection if no substreams are open within this time frame. + pub(crate) keep_alive_timeout: Duration, - /// Use system's DNS config. - pub(crate) use_system_dns_config: bool, + /// Use system's DNS config. + pub(crate) use_system_dns_config: bool, } diff --git a/client/litep2p/src/crypto/dilithium.rs b/client/litep2p/src/crypto/dilithium.rs index cd39448a..b9a3fa9b 100644 --- a/client/litep2p/src/crypto/dilithium.rs +++ b/client/litep2p/src/crypto/dilithium.rs @@ -21,8 +21,8 @@ //! Dilithium ML-DSA-87 keys for post-quantum cryptography. use crate::{ - error::{Error, ParseError}, - PeerId, + error::{Error, ParseError}, + PeerId, }; use qp_rusty_crystals_dilithium::{ml_dsa_87, SensitiveBytes32}; @@ -44,124 +44,117 @@ pub const SEED_BYTES: usize = 32; /// The full secret key is derived on-demand when signing. #[derive(Clone)] pub struct Keypair { - /// The seed used to generate the keypair (32 bytes). - seed: [u8; SEED_BYTES], - /// The public key. - public: ml_dsa_87::PublicKey, + /// The seed used to generate the keypair (32 bytes). + seed: [u8; SEED_BYTES], + /// The public key. + public: ml_dsa_87::PublicKey, } impl Keypair { - /// Generate a new random Dilithium keypair. - pub fn generate() -> Keypair { - Keypair::from(SecretKey::generate()) - } - - /// Convert the keypair into a byte array. - /// - /// Returns the 32-byte seed concatenated with the public key bytes. - /// Format: [seed (32 bytes)][public key (2592 bytes)] - pub fn to_bytes(&self) -> Vec { - let mut bytes = Vec::with_capacity(SEED_BYTES + PUBLIC_KEY_BYTES); - bytes.extend_from_slice(&self.seed); - bytes.extend_from_slice(&self.public.to_bytes()); - bytes - } - - /// Try to parse a keypair from bytes, zeroing the input on success. - /// - /// Accepts either: - /// - 32 bytes (seed only) - public key will be regenerated - /// - 32 + 2592 bytes (seed + public key) - pub fn try_from_bytes(kp: &mut [u8]) -> Result { - if kp.len() == SEED_BYTES { - // Seed only - regenerate the keypair - let mut seed = [0u8; SEED_BYTES]; - seed.copy_from_slice(kp); - kp.zeroize(); - - let sensitive_seed = SensitiveBytes32::from(&mut seed.clone()); - let internal_kp = ml_dsa_87::Keypair::generate(sensitive_seed); - - Ok(Keypair { - seed, - public: internal_kp.public, - }) - } else if kp.len() == SEED_BYTES + PUBLIC_KEY_BYTES { - // Full keypair - let mut seed = [0u8; SEED_BYTES]; - seed.copy_from_slice(&kp[..SEED_BYTES]); - - let public = ml_dsa_87::PublicKey::from_bytes(&kp[SEED_BYTES..]) - .map_err(|e| Error::Other(format!("Failed to parse Dilithium public key: {e:?}")))?; - - kp.zeroize(); - - Ok(Keypair { seed, public }) - } else { - Err(Error::Other(format!( - "Invalid Dilithium keypair length: expected {} or {} bytes, got {}", - SEED_BYTES, - SEED_BYTES + PUBLIC_KEY_BYTES, - kp.len() - ))) - } - } - - /// Sign a message using the private key of this keypair. - pub fn sign(&self, msg: &[u8]) -> Vec { - // Regenerate the full keypair from seed for signing - let mut seed_copy = self.seed; - let sensitive_seed = SensitiveBytes32::from(&mut seed_copy); - let internal_kp = ml_dsa_87::Keypair::generate(sensitive_seed); - - // Sign without context, with hedged randomness for side-channel protection - let mut hedge = [0u8; 32]; - rand::RngCore::fill_bytes(&mut rand::rngs::OsRng, &mut hedge); - - internal_kp - .sign(msg, None, Some(hedge)) - .expect("Signing should not fail") - .to_vec() - } - - /// Get the public key of this keypair. - pub fn public(&self) -> PublicKey { - PublicKey(self.public.clone()) - } - - /// Get the secret key (seed) of this keypair. - pub fn secret(&self) -> SecretKey { - SecretKey(self.seed) - } + /// Generate a new random Dilithium keypair. + pub fn generate() -> Keypair { + Keypair::from(SecretKey::generate()) + } + + /// Convert the keypair into a byte array. + /// + /// Returns the 32-byte seed concatenated with the public key bytes. + /// Format: [seed (32 bytes)][public key (2592 bytes)] + pub fn to_bytes(&self) -> Vec { + let mut bytes = Vec::with_capacity(SEED_BYTES + PUBLIC_KEY_BYTES); + bytes.extend_from_slice(&self.seed); + bytes.extend_from_slice(&self.public.to_bytes()); + bytes + } + + /// Try to parse a keypair from bytes, zeroing the input on success. + /// + /// Accepts either: + /// - 32 bytes (seed only) - public key will be regenerated + /// - 32 + 2592 bytes (seed + public key) + pub fn try_from_bytes(kp: &mut [u8]) -> Result { + if kp.len() == SEED_BYTES { + // Seed only - regenerate the keypair + let mut seed = [0u8; SEED_BYTES]; + seed.copy_from_slice(kp); + kp.zeroize(); + + let sensitive_seed = SensitiveBytes32::from(&mut seed.clone()); + let internal_kp = ml_dsa_87::Keypair::generate(sensitive_seed); + + Ok(Keypair { seed, public: internal_kp.public }) + } else if kp.len() == SEED_BYTES + PUBLIC_KEY_BYTES { + // Full keypair + let mut seed = [0u8; SEED_BYTES]; + seed.copy_from_slice(&kp[..SEED_BYTES]); + + let public = ml_dsa_87::PublicKey::from_bytes(&kp[SEED_BYTES..]).map_err(|e| { + Error::Other(format!("Failed to parse Dilithium public key: {e:?}")) + })?; + + kp.zeroize(); + + Ok(Keypair { seed, public }) + } else { + Err(Error::Other(format!( + "Invalid Dilithium keypair length: expected {} or {} bytes, got {}", + SEED_BYTES, + SEED_BYTES + PUBLIC_KEY_BYTES, + kp.len() + ))) + } + } + + /// Sign a message using the private key of this keypair. + pub fn sign(&self, msg: &[u8]) -> Vec { + // Regenerate the full keypair from seed for signing + let mut seed_copy = self.seed; + let sensitive_seed = SensitiveBytes32::from(&mut seed_copy); + let internal_kp = ml_dsa_87::Keypair::generate(sensitive_seed); + + // Sign without context, with hedged randomness for side-channel protection + let mut hedge = [0u8; 32]; + rand::RngCore::fill_bytes(&mut rand::rngs::OsRng, &mut hedge); + + internal_kp + .sign(msg, None, Some(hedge)) + .expect("Signing should not fail") + .to_vec() + } + + /// Get the public key of this keypair. + pub fn public(&self) -> PublicKey { + PublicKey(self.public.clone()) + } + + /// Get the secret key (seed) of this keypair. + pub fn secret(&self) -> SecretKey { + SecretKey(self.seed) + } } impl fmt::Debug for Keypair { - fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { - f.debug_struct("Keypair") - .field("public", &self.public) - .finish_non_exhaustive() - } + fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { + f.debug_struct("Keypair").field("public", &self.public).finish_non_exhaustive() + } } /// Demote a Dilithium keypair to a secret key (seed). impl From for SecretKey { - fn from(kp: Keypair) -> SecretKey { - SecretKey(kp.seed) - } + fn from(kp: Keypair) -> SecretKey { + SecretKey(kp.seed) + } } /// Promote a Dilithium secret key (seed) into a keypair. impl From for Keypair { - fn from(sk: SecretKey) -> Keypair { - let mut seed_copy = sk.0; - let sensitive_seed = SensitiveBytes32::from(&mut seed_copy); - let internal_kp = ml_dsa_87::Keypair::generate(sensitive_seed); - - Keypair { - seed: sk.0, - public: internal_kp.public, - } - } + fn from(sk: SecretKey) -> Keypair { + let mut seed_copy = sk.0; + let sensitive_seed = SensitiveBytes32::from(&mut seed_copy); + let internal_kp = ml_dsa_87::Keypair::generate(sensitive_seed); + + Keypair { seed: sk.0, public: internal_kp.public } + } } /// A Dilithium ML-DSA-87 public key. @@ -169,50 +162,50 @@ impl From for Keypair { pub struct PublicKey(ml_dsa_87::PublicKey); impl fmt::Debug for PublicKey { - fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { - f.write_str("PublicKey(Dilithium): ")?; - // Only show first 8 bytes for readability - for byte in &self.0.bytes[..8] { - write!(f, "{byte:02x}")?; - } - write!(f, "...")?; - Ok(()) - } + fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { + f.write_str("PublicKey(Dilithium): ")?; + // Only show first 8 bytes for readability + for byte in &self.0.bytes[..8] { + write!(f, "{byte:02x}")?; + } + write!(f, "...")?; + Ok(()) + } } impl PartialEq for PublicKey { - fn eq(&self, other: &Self) -> bool { - self.0.bytes.eq(&other.0.bytes) - } + fn eq(&self, other: &Self) -> bool { + self.0.bytes.eq(&other.0.bytes) + } } impl PublicKey { - /// Verify the Dilithium signature on a message using the public key. - pub fn verify(&self, msg: &[u8], sig: &[u8]) -> bool { - self.0.verify(msg, sig, None) - } - - /// Convert the public key to a byte array. - pub fn to_bytes(&self) -> Vec { - self.0.to_bytes().to_vec() - } - - /// Get the public key as a byte slice. - pub fn as_bytes(&self) -> &[u8] { - &self.0.bytes - } - - /// Try to parse a public key from a byte slice. - pub fn try_from_bytes(k: &[u8]) -> Result { - ml_dsa_87::PublicKey::from_bytes(k) - .map(PublicKey) - .map_err(|_| ParseError::InvalidPublicKey) - } - - /// Convert public key to `PeerId`. - pub fn to_peer_id(&self) -> PeerId { - crate::crypto::PublicKey::from(self.clone()).into() - } + /// Verify the Dilithium signature on a message using the public key. + pub fn verify(&self, msg: &[u8], sig: &[u8]) -> bool { + self.0.verify(msg, sig, None) + } + + /// Convert the public key to a byte array. + pub fn to_bytes(&self) -> Vec { + self.0.to_bytes().to_vec() + } + + /// Get the public key as a byte slice. + pub fn as_bytes(&self) -> &[u8] { + &self.0.bytes + } + + /// Try to parse a public key from a byte slice. + pub fn try_from_bytes(k: &[u8]) -> Result { + ml_dsa_87::PublicKey::from_bytes(k) + .map(PublicKey) + .map_err(|_| ParseError::InvalidPublicKey) + } + + /// Convert public key to `PeerId`. + pub fn to_peer_id(&self) -> PeerId { + crate::crypto::PublicKey::from(self.clone()).into() + } } /// A Dilithium secret key (stored as 32-byte seed). @@ -220,117 +213,117 @@ impl PublicKey { pub struct SecretKey([u8; SEED_BYTES]); impl Drop for SecretKey { - fn drop(&mut self) { - self.0.zeroize(); - } + fn drop(&mut self) { + self.0.zeroize(); + } } /// View the bytes of the secret key (seed). impl AsRef<[u8]> for SecretKey { - fn as_ref(&self) -> &[u8] { - &self.0[..] - } + fn as_ref(&self) -> &[u8] { + &self.0[..] + } } impl fmt::Debug for SecretKey { - fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { - write!(f, "SecretKey(Dilithium)") - } + fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { + write!(f, "SecretKey(Dilithium)") + } } impl SecretKey { - /// Generate a new Dilithium secret key (seed). - pub fn generate() -> SecretKey { - let mut seed = [0u8; SEED_BYTES]; - rand::RngCore::fill_bytes(&mut rand::rngs::OsRng, &mut seed); - SecretKey(seed) - } - - /// Try to parse a Dilithium secret key from a byte slice, - /// zeroing the input on success. - pub fn try_from_bytes(mut sk_bytes: impl AsMut<[u8]>) -> crate::Result { - let sk_bytes = sk_bytes.as_mut(); - let secret = <[u8; SEED_BYTES]>::try_from(&*sk_bytes) - .map_err(|e| Error::Other(format!("Failed to parse Dilithium secret key: {e}")))?; - sk_bytes.zeroize(); - Ok(SecretKey(secret)) - } - - /// Convert this secret key to a byte array. - pub fn to_bytes(&self) -> [u8; SEED_BYTES] { - self.0 - } + /// Generate a new Dilithium secret key (seed). + pub fn generate() -> SecretKey { + let mut seed = [0u8; SEED_BYTES]; + rand::RngCore::fill_bytes(&mut rand::rngs::OsRng, &mut seed); + SecretKey(seed) + } + + /// Try to parse a Dilithium secret key from a byte slice, + /// zeroing the input on success. + pub fn try_from_bytes(mut sk_bytes: impl AsMut<[u8]>) -> crate::Result { + let sk_bytes = sk_bytes.as_mut(); + let secret = <[u8; SEED_BYTES]>::try_from(&*sk_bytes) + .map_err(|e| Error::Other(format!("Failed to parse Dilithium secret key: {e}")))?; + sk_bytes.zeroize(); + Ok(SecretKey(secret)) + } + + /// Convert this secret key to a byte array. + pub fn to_bytes(&self) -> [u8; SEED_BYTES] { + self.0 + } } #[cfg(test)] mod tests { - use super::*; - - fn eq_keypairs(kp1: &Keypair, kp2: &Keypair) -> bool { - kp1.public() == kp2.public() && kp1.seed == kp2.seed - } - - #[test] - fn dilithium_keypair_encode_decode() { - let kp1 = Keypair::generate(); - let mut kp1_enc = kp1.to_bytes(); - let kp2 = Keypair::try_from_bytes(&mut kp1_enc).unwrap(); - assert!(eq_keypairs(&kp1, &kp2)); - // Verify the bytes were zeroized - assert!(kp1_enc.iter().all(|b| *b == 0)); - } - - #[test] - fn dilithium_keypair_from_seed_only() { - let kp1 = Keypair::generate(); - let mut seed = kp1.secret().to_bytes(); - let kp2 = Keypair::try_from_bytes(&mut seed[..]).unwrap(); - assert!(eq_keypairs(&kp1, &kp2)); - } - - #[test] - fn dilithium_keypair_from_secret() { - let kp1 = Keypair::generate(); - let sk = kp1.secret(); - let kp2 = Keypair::from(sk); - assert!(eq_keypairs(&kp1, &kp2)); - } - - #[test] - fn dilithium_signature() { - let kp = Keypair::generate(); - let pk = kp.public(); - - let msg = "hello world".as_bytes(); - let sig = kp.sign(msg); - assert!(pk.verify(msg, &sig)); - - // Invalid signature - let mut invalid_sig = sig.clone(); - invalid_sig[3..6].copy_from_slice(&[10, 23, 42]); - assert!(!pk.verify(msg, &invalid_sig)); - - // Wrong message - let invalid_msg = "h3ll0 w0rld".as_bytes(); - assert!(!pk.verify(invalid_msg, &sig)); - } - - #[test] - fn dilithium_public_key_roundtrip() { - let kp = Keypair::generate(); - let pk = kp.public(); - let pk_bytes = pk.to_bytes(); - let pk2 = PublicKey::try_from_bytes(&pk_bytes).unwrap(); - assert_eq!(pk, pk2); - } - - #[test] - fn secret_key_zeroized_on_drop() { - let kp = Keypair::generate(); - let sk = kp.secret(); - let sk_bytes = sk.to_bytes(); - // Verify we got valid bytes - assert!(!sk_bytes.iter().all(|b| *b == 0)); - // Drop happens automatically - } + use super::*; + + fn eq_keypairs(kp1: &Keypair, kp2: &Keypair) -> bool { + kp1.public() == kp2.public() && kp1.seed == kp2.seed + } + + #[test] + fn dilithium_keypair_encode_decode() { + let kp1 = Keypair::generate(); + let mut kp1_enc = kp1.to_bytes(); + let kp2 = Keypair::try_from_bytes(&mut kp1_enc).unwrap(); + assert!(eq_keypairs(&kp1, &kp2)); + // Verify the bytes were zeroized + assert!(kp1_enc.iter().all(|b| *b == 0)); + } + + #[test] + fn dilithium_keypair_from_seed_only() { + let kp1 = Keypair::generate(); + let mut seed = kp1.secret().to_bytes(); + let kp2 = Keypair::try_from_bytes(&mut seed[..]).unwrap(); + assert!(eq_keypairs(&kp1, &kp2)); + } + + #[test] + fn dilithium_keypair_from_secret() { + let kp1 = Keypair::generate(); + let sk = kp1.secret(); + let kp2 = Keypair::from(sk); + assert!(eq_keypairs(&kp1, &kp2)); + } + + #[test] + fn dilithium_signature() { + let kp = Keypair::generate(); + let pk = kp.public(); + + let msg = "hello world".as_bytes(); + let sig = kp.sign(msg); + assert!(pk.verify(msg, &sig)); + + // Invalid signature + let mut invalid_sig = sig.clone(); + invalid_sig[3..6].copy_from_slice(&[10, 23, 42]); + assert!(!pk.verify(msg, &invalid_sig)); + + // Wrong message + let invalid_msg = "h3ll0 w0rld".as_bytes(); + assert!(!pk.verify(invalid_msg, &sig)); + } + + #[test] + fn dilithium_public_key_roundtrip() { + let kp = Keypair::generate(); + let pk = kp.public(); + let pk_bytes = pk.to_bytes(); + let pk2 = PublicKey::try_from_bytes(&pk_bytes).unwrap(); + assert_eq!(pk, pk2); + } + + #[test] + fn secret_key_zeroized_on_drop() { + let kp = Keypair::generate(); + let sk = kp.secret(); + let sk_bytes = sk.to_bytes(); + // Verify we got valid bytes + assert!(!sk_bytes.iter().all(|b| *b == 0)); + // Drop happens automatically + } } diff --git a/client/litep2p/src/crypto/mod.rs b/client/litep2p/src/crypto/mod.rs index 03f20056..ed034444 100644 --- a/client/litep2p/src/crypto/mod.rs +++ b/client/litep2p/src/crypto/mod.rs @@ -32,7 +32,7 @@ pub(crate) mod noise; #[cfg(feature = "quic")] pub(crate) mod tls; pub(crate) mod keys_proto { - include!(concat!(env!("OUT_DIR"), "/keys_proto.rs")); + include!(concat!(env!("OUT_DIR"), "/keys_proto.rs")); } // Re-export Keypair for convenience @@ -43,68 +43,68 @@ pub use dilithium::Keypair; pub struct PublicKey(pub(crate) dilithium::PublicKey); impl PublicKey { - /// Encode the public key into a protobuf structure for storage or - /// exchange with other nodes. - pub fn to_protobuf_encoding(&self) -> Vec { - use prost::Message; - - let public_key = keys_proto::PublicKey::from(self); - - let mut buf = Vec::with_capacity(public_key.encoded_len()); - public_key.encode(&mut buf).expect("Vec provides capacity as needed"); - buf - } - - /// Convert the `PublicKey` into the corresponding `PeerId`. - pub fn to_peer_id(&self) -> PeerId { - self.into() - } - - /// Verify a signature for a message using this public key. - #[must_use] - pub fn verify(&self, msg: &[u8], sig: &[u8]) -> bool { - self.0.verify(msg, sig) - } - - /// Convert the public key to bytes. - pub fn to_bytes(&self) -> Vec { - self.0.to_bytes() - } - - /// Get the public key as a byte slice. - pub fn as_bytes(&self) -> &[u8] { - self.0.as_bytes() - } + /// Encode the public key into a protobuf structure for storage or + /// exchange with other nodes. + pub fn to_protobuf_encoding(&self) -> Vec { + use prost::Message; + + let public_key = keys_proto::PublicKey::from(self); + + let mut buf = Vec::with_capacity(public_key.encoded_len()); + public_key.encode(&mut buf).expect("Vec provides capacity as needed"); + buf + } + + /// Convert the `PublicKey` into the corresponding `PeerId`. + pub fn to_peer_id(&self) -> PeerId { + self.into() + } + + /// Verify a signature for a message using this public key. + #[must_use] + pub fn verify(&self, msg: &[u8], sig: &[u8]) -> bool { + self.0.verify(msg, sig) + } + + /// Convert the public key to bytes. + pub fn to_bytes(&self) -> Vec { + self.0.to_bytes() + } + + /// Get the public key as a byte slice. + pub fn as_bytes(&self) -> &[u8] { + self.0.as_bytes() + } } impl From<&PublicKey> for keys_proto::PublicKey { - fn from(key: &PublicKey) -> Self { - keys_proto::PublicKey { - r#type: keys_proto::KeyType::Dilithium as i32, - data: key.0.to_bytes(), - } - } + fn from(key: &PublicKey) -> Self { + keys_proto::PublicKey { + r#type: keys_proto::KeyType::Dilithium as i32, + data: key.0.to_bytes(), + } + } } impl TryFrom for PublicKey { - type Error = ParseError; + type Error = ParseError; - fn try_from(pubkey: keys_proto::PublicKey) -> Result { - let key_type = keys_proto::KeyType::try_from(pubkey.r#type) - .map_err(|_| ParseError::UnknownKeyType(pubkey.r#type))?; + fn try_from(pubkey: keys_proto::PublicKey) -> Result { + let key_type = keys_proto::KeyType::try_from(pubkey.r#type) + .map_err(|_| ParseError::UnknownKeyType(pubkey.r#type))?; - if key_type != keys_proto::KeyType::Dilithium { - return Err(ParseError::UnknownKeyType(key_type as i32)); - } + if key_type != keys_proto::KeyType::Dilithium { + return Err(ParseError::UnknownKeyType(key_type as i32)); + } - dilithium::PublicKey::try_from_bytes(&pubkey.data).map(PublicKey) - } + dilithium::PublicKey::try_from_bytes(&pubkey.data).map(PublicKey) + } } impl From for PublicKey { - fn from(public_key: dilithium::PublicKey) -> Self { - PublicKey(public_key) - } + fn from(public_key: dilithium::PublicKey) -> Self { + PublicKey(public_key) + } } /// The public key of a remote node's identity keypair. @@ -113,13 +113,13 @@ impl From for PublicKey { pub type RemotePublicKey = PublicKey; impl RemotePublicKey { - /// Decode a public key from a protobuf structure, e.g. read from storage - /// or received from another node. - pub fn from_protobuf_encoding(bytes: &[u8]) -> Result { - use prost::Message; + /// Decode a public key from a protobuf structure, e.g. read from storage + /// or received from another node. + pub fn from_protobuf_encoding(bytes: &[u8]) -> Result { + use prost::Message; - let pubkey = keys_proto::PublicKey::decode(bytes)?; + let pubkey = keys_proto::PublicKey::decode(bytes)?; - pubkey.try_into() - } + pubkey.try_into() + } } diff --git a/client/litep2p/src/crypto/noise/mod.rs b/client/litep2p/src/crypto/noise/mod.rs index 5712b11a..ffdfeeaf 100644 --- a/client/litep2p/src/crypto/noise/mod.rs +++ b/client/litep2p/src/crypto/noise/mod.rs @@ -30,14 +30,14 @@ //! //! 1. Initiator -> Responder: `e` (ephemeral KEM public key) //! 2. Responder -> Initiator: `ekem, e, es` + identity payload -//! 3. Initiator -> Responder: `skem, s, se` + identity payload +//! 3. Initiator -> Responder: `skem, s, se` + identity payload //! 4. Responder -> Initiator: `sks` (final KEM, empty payload) use crate::{ - config::Role, - crypto::{dilithium::Keypair, PublicKey, RemotePublicKey}, - error::{NegotiationError, ParseError}, - PeerId, + config::Role, + crypto::{dilithium::Keypair, PublicKey, RemotePublicKey}, + error::{NegotiationError, ParseError}, + PeerId, }; use bytes::{Buf, Bytes, BytesMut}; @@ -45,9 +45,9 @@ use futures::io::{AsyncRead, AsyncReadExt, AsyncWrite, AsyncWriteExt}; use prost::Message; use std::{ - fmt, io, - pin::Pin, - task::{Context, Poll}, + fmt, io, + pin::Pin, + task::{Context, Poll}, }; mod protocol; @@ -55,7 +55,7 @@ mod protocol; use protocol::{ClatterSession, ClatterTransport}; mod handshake_schema { - include!(concat!(env!("OUT_DIR"), "/noise.rs")); + include!(concat!(env!("OUT_DIR"), "/noise.rs")); } /// Prefix of static key signatures for domain separation. @@ -91,722 +91,699 @@ const HANDSHAKE_BUFFER_SIZE: usize = 16384; #[derive(Debug)] enum NoiseState { - Handshake(ClatterSession), - Transport(ClatterTransport), + Handshake(ClatterSession), + Transport(ClatterTransport), } pub struct NoiseContext { - /// ML-KEM 768 keypair for the Noise static key - kem_keypair: protocol::Keypair, - /// Clatter session/transport state - noise: NoiseState, - /// Role (dialer/listener) - role: Role, - /// Identity payload (Dilithium public key + signature over KEM public key) - pub payload: Vec, + /// ML-KEM 768 keypair for the Noise static key + kem_keypair: protocol::Keypair, + /// Clatter session/transport state + noise: NoiseState, + /// Role (dialer/listener) + role: Role, + /// Identity payload (Dilithium public key + signature over KEM public key) + pub payload: Vec, } impl fmt::Debug for NoiseContext { - fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { - f.debug_struct("NoiseContext") - .field("noise", &self.noise) - .field("payload", &self.payload) - .field("role", &self.role) - .finish() - } + fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { + f.debug_struct("NoiseContext") + .field("noise", &self.noise) + .field("payload", &self.payload) + .field("role", &self.role) + .finish() + } } impl NoiseContext { - /// Assemble Noise payload and return [`NoiseContext`]. - fn assemble( - session: ClatterSession, - kem_keypair: protocol::Keypair, - id_keys: &Keypair, - role: Role, - ) -> Result { - // Sign the ML-KEM public key with the Dilithium identity key - let noise_payload = handshake_schema::NoiseHandshakePayload { - identity_key: Some(PublicKey::from(id_keys.public()).to_protobuf_encoding()), - identity_sig: Some( - id_keys.sign(&[STATIC_KEY_DOMAIN.as_bytes(), kem_keypair.public().as_ref()].concat()), - ), - ..Default::default() - }; - - let mut payload = Vec::with_capacity(noise_payload.encoded_len()); - noise_payload.encode(&mut payload).map_err(ParseError::from)?; - - Ok(Self { - noise: NoiseState::Handshake(session), - kem_keypair, - payload, - role, - }) - } - - /// Create a new NoiseContext for the pqXX handshake. - pub fn new(keypair: &Keypair, role: Role) -> Result { - tracing::trace!(target: LOG_TARGET, ?role, "create new noise configuration (pqXX + ML-KEM 768)"); - - // Generate ML-KEM 768 keypair for Noise static key - let kem_keypair = protocol::Keypair::new(); - - let is_initiator = matches!(role, Role::Dialer); - let session = ClatterSession::new(&[], is_initiator, &kem_keypair)?; - - Self::assemble(session, kem_keypair, keypair, role) - } - - /// Create new [`NoiseContext`] with prologue (for WebRTC). - #[cfg(feature = "webrtc")] - pub fn with_prologue(id_keys: &Keypair, prologue: Vec) -> Result { - let kem_keypair = protocol::Keypair::new(); - let session = ClatterSession::new(&prologue, true, &kem_keypair)?; - Self::assemble(session, kem_keypair, id_keys, Role::Dialer) - } - - /// Get remote peer ID from the received Noise payload (for WebRTC). - #[cfg(feature = "webrtc")] - pub fn get_remote_peer_id(&mut self, reply: &[u8]) -> Result { - if reply.len() < 2 { - tracing::error!(target: LOG_TARGET, "reply too short to contain length prefix"); - return Err(NegotiationError::ParseError(ParseError::InvalidReplyLength)); - } - - let (len_slice, reply) = reply.split_at(2); - let len = u16::from_be_bytes( - len_slice - .try_into() - .map_err(|_| NegotiationError::ParseError(ParseError::InvalidPublicKey))?, - ) as usize; - - let mut buffer = vec![0u8; len]; - - let NoiseState::Handshake(ref mut session) = self.noise else { - tracing::error!(target: LOG_TARGET, "invalid state to read the handshake message"); - debug_assert!(false); - return Err(NegotiationError::StateMismatch); - }; - - let res = session.read_message(reply, &mut buffer)?; - buffer.truncate(res); - - let payload = handshake_schema::NoiseHandshakePayload::decode(buffer.as_slice()) - .map_err(|err| NegotiationError::ParseError(err.into()))?; - - let identity = payload.identity_key.ok_or(NegotiationError::PeerIdMissing)?; - Ok(PeerId::from_public_key_protobuf(&identity)) - } - - /// Get first message (pqXX message 1: -> e). - /// - /// For initiator: sends ephemeral KEM public key - /// For listener: sends message 2 (identity payload) - pub fn first_message(&mut self, role: Role) -> Result, NegotiationError> { - match role { - Role::Dialer => { - tracing::trace!(target: LOG_TARGET, "get noise dialer first message (-> e)"); - - let NoiseState::Handshake(ref mut session) = self.noise else { - tracing::error!(target: LOG_TARGET, "invalid state to write the first handshake message"); - debug_assert!(false); - return Err(NegotiationError::StateMismatch); - }; - - // pqXX message 1: -> e (ephemeral KEM public key, ~1184 bytes) - let mut buffer = vec![0u8; HANDSHAKE_BUFFER_SIZE]; - let nwritten = session.write_message(&[], &mut buffer)?; - buffer.truncate(nwritten); - - let size = nwritten as u16; - let mut size = size.to_be_bytes().to_vec(); - size.append(&mut buffer); - - Ok(size) - } - Role::Listener => self.second_message(), - } - } - - /// Get second message (pqXX message 2 or 3 depending on role). - /// - /// Contains the identity payload (Dilithium public key + signature). - pub fn second_message(&mut self) -> Result, NegotiationError> { - tracing::trace!(target: LOG_TARGET, role = ?self.role, "get noise payload message"); - - let NoiseState::Handshake(ref mut session) = self.noise else { - tracing::error!(target: LOG_TARGET, "invalid state to write handshake message"); - debug_assert!(false); - return Err(NegotiationError::StateMismatch); - }; - - // pqXX message 2 or 3 with identity payload - // Buffer needs space for: - // - ML-KEM ciphertext: 1088 bytes - // - ML-KEM public key: 1184 bytes - // - Dilithium identity: ~7230 bytes - // - Encryption overhead - let mut buffer = vec![0u8; HANDSHAKE_BUFFER_SIZE]; - let nwritten = session.write_message(&self.payload, &mut buffer)?; - buffer.truncate(nwritten); - - let size = nwritten as u16; - let mut size = size.to_be_bytes().to_vec(); - size.append(&mut buffer); - - Ok(size) - } - - /// Get final KEM message (pqXX message 4: <- sks). - /// - /// Only sent by responder to complete the handshake. - pub fn final_kem_message(&mut self) -> Result, NegotiationError> { - tracing::trace!(target: LOG_TARGET, "get noise final KEM message (<- sks)"); - - let NoiseState::Handshake(ref mut session) = self.noise else { - tracing::error!(target: LOG_TARGET, "invalid state to write final KEM message"); - debug_assert!(false); - return Err(NegotiationError::StateMismatch); - }; - - // pqXX message 4: <- sks (KEM ciphertext, empty payload) - let mut buffer = vec![0u8; HANDSHAKE_BUFFER_SIZE]; - let nwritten = session.write_message(&[], &mut buffer)?; - buffer.truncate(nwritten); - - let size = nwritten as u16; - let mut size = size.to_be_bytes().to_vec(); - size.append(&mut buffer); - - Ok(size) - } - - /// Read handshake message from the wire. - async fn read_handshake_message( - &mut self, - io: &mut T, - ) -> Result { - let mut size = BytesMut::zeroed(2); - io.read_exact(&mut size).await?; - let size = size.get_u16(); - - let mut message = BytesMut::zeroed(size as usize); - io.read_exact(&mut message).await?; - - let mut out = BytesMut::new(); - out.resize(message.len() + HANDSHAKE_BUFFER_SIZE, 0u8); - - let NoiseState::Handshake(ref mut session) = self.noise else { - tracing::error!(target: LOG_TARGET, "invalid state to read handshake message"); - debug_assert!(false); - return Err(NegotiationError::StateMismatch); - }; - - let nread = session.read_message(&message, &mut out)?; - out.truncate(nread); - - Ok(out.freeze()) - } - - /// Read a message (works in both handshake and transport mode). - fn read_message(&mut self, message: &[u8], out: &mut [u8]) -> Result { - match &mut self.noise { - NoiseState::Handshake(session) => session.read_message(message, out), - NoiseState::Transport(transport) => transport.read_message(message, out), - } - } - - /// Write a message (works in both handshake and transport mode). - fn write_message(&mut self, message: &[u8], out: &mut [u8]) -> Result { - match &mut self.noise { - NoiseState::Handshake(session) => session.write_message(message, out), - NoiseState::Transport(transport) => transport.write_message(message, out), - } - } - - /// Get the remote's static KEM public key. - fn get_remote_static(&self) -> Result, NegotiationError> { - let NoiseState::Handshake(ref session) = self.noise else { - tracing::error!(target: LOG_TARGET, "invalid state to get remote public key"); - return Err(NegotiationError::StateMismatch); - }; - - session - .get_remote_static() - .ok_or_else(|| { - tracing::error!(target: LOG_TARGET, "expected remote public key at the end of pqXX session"); - NegotiationError::IoError(std::io::ErrorKind::InvalidData) - }) - } - - /// Convert Noise into transport mode. - fn into_transport(self) -> Result { - let transport = match self.noise { - NoiseState::Handshake(session) => session.into_transport_mode()?, - NoiseState::Transport(_) => return Err(NegotiationError::StateMismatch), - }; - - Ok(NoiseContext { - kem_keypair: self.kem_keypair, - payload: self.payload, - role: self.role, - noise: NoiseState::Transport(transport), - }) - } + /// Assemble Noise payload and return [`NoiseContext`]. + fn assemble( + session: ClatterSession, + kem_keypair: protocol::Keypair, + id_keys: &Keypair, + role: Role, + ) -> Result { + // Sign the ML-KEM public key with the Dilithium identity key + let noise_payload = handshake_schema::NoiseHandshakePayload { + identity_key: Some(PublicKey::from(id_keys.public()).to_protobuf_encoding()), + identity_sig: Some( + id_keys + .sign(&[STATIC_KEY_DOMAIN.as_bytes(), kem_keypair.public().as_ref()].concat()), + ), + ..Default::default() + }; + + let mut payload = Vec::with_capacity(noise_payload.encoded_len()); + noise_payload.encode(&mut payload).map_err(ParseError::from)?; + + Ok(Self { noise: NoiseState::Handshake(session), kem_keypair, payload, role }) + } + + /// Create a new NoiseContext for the pqXX handshake. + pub fn new(keypair: &Keypair, role: Role) -> Result { + tracing::trace!(target: LOG_TARGET, ?role, "create new noise configuration (pqXX + ML-KEM 768)"); + + // Generate ML-KEM 768 keypair for Noise static key + let kem_keypair = protocol::Keypair::new(); + + let is_initiator = matches!(role, Role::Dialer); + let session = ClatterSession::new(&[], is_initiator, &kem_keypair)?; + + Self::assemble(session, kem_keypair, keypair, role) + } + + /// Create new [`NoiseContext`] with prologue (for WebRTC). + #[cfg(feature = "webrtc")] + pub fn with_prologue(id_keys: &Keypair, prologue: Vec) -> Result { + let kem_keypair = protocol::Keypair::new(); + let session = ClatterSession::new(&prologue, true, &kem_keypair)?; + Self::assemble(session, kem_keypair, id_keys, Role::Dialer) + } + + /// Get remote peer ID from the received Noise payload (for WebRTC). + #[cfg(feature = "webrtc")] + pub fn get_remote_peer_id(&mut self, reply: &[u8]) -> Result { + if reply.len() < 2 { + tracing::error!(target: LOG_TARGET, "reply too short to contain length prefix"); + return Err(NegotiationError::ParseError(ParseError::InvalidReplyLength)); + } + + let (len_slice, reply) = reply.split_at(2); + let len = u16::from_be_bytes( + len_slice + .try_into() + .map_err(|_| NegotiationError::ParseError(ParseError::InvalidPublicKey))?, + ) as usize; + + let mut buffer = vec![0u8; len]; + + let NoiseState::Handshake(ref mut session) = self.noise else { + tracing::error!(target: LOG_TARGET, "invalid state to read the handshake message"); + debug_assert!(false); + return Err(NegotiationError::StateMismatch); + }; + + let res = session.read_message(reply, &mut buffer)?; + buffer.truncate(res); + + let payload = handshake_schema::NoiseHandshakePayload::decode(buffer.as_slice()) + .map_err(|err| NegotiationError::ParseError(err.into()))?; + + let identity = payload.identity_key.ok_or(NegotiationError::PeerIdMissing)?; + Ok(PeerId::from_public_key_protobuf(&identity)) + } + + /// Get first message (pqXX message 1: -> e). + /// + /// For initiator: sends ephemeral KEM public key + /// For listener: sends message 2 (identity payload) + pub fn first_message(&mut self, role: Role) -> Result, NegotiationError> { + match role { + Role::Dialer => { + tracing::trace!(target: LOG_TARGET, "get noise dialer first message (-> e)"); + + let NoiseState::Handshake(ref mut session) = self.noise else { + tracing::error!(target: LOG_TARGET, "invalid state to write the first handshake message"); + debug_assert!(false); + return Err(NegotiationError::StateMismatch); + }; + + // pqXX message 1: -> e (ephemeral KEM public key, ~1184 bytes) + let mut buffer = vec![0u8; HANDSHAKE_BUFFER_SIZE]; + let nwritten = session.write_message(&[], &mut buffer)?; + buffer.truncate(nwritten); + + let size = nwritten as u16; + let mut size = size.to_be_bytes().to_vec(); + size.append(&mut buffer); + + Ok(size) + }, + Role::Listener => self.second_message(), + } + } + + /// Get second message (pqXX message 2 or 3 depending on role). + /// + /// Contains the identity payload (Dilithium public key + signature). + pub fn second_message(&mut self) -> Result, NegotiationError> { + tracing::trace!(target: LOG_TARGET, role = ?self.role, "get noise payload message"); + + let NoiseState::Handshake(ref mut session) = self.noise else { + tracing::error!(target: LOG_TARGET, "invalid state to write handshake message"); + debug_assert!(false); + return Err(NegotiationError::StateMismatch); + }; + + // pqXX message 2 or 3 with identity payload + // Buffer needs space for: + // - ML-KEM ciphertext: 1088 bytes + // - ML-KEM public key: 1184 bytes + // - Dilithium identity: ~7230 bytes + // - Encryption overhead + let mut buffer = vec![0u8; HANDSHAKE_BUFFER_SIZE]; + let nwritten = session.write_message(&self.payload, &mut buffer)?; + buffer.truncate(nwritten); + + let size = nwritten as u16; + let mut size = size.to_be_bytes().to_vec(); + size.append(&mut buffer); + + Ok(size) + } + + /// Get final KEM message (pqXX message 4: <- sks). + /// + /// Only sent by responder to complete the handshake. + pub fn final_kem_message(&mut self) -> Result, NegotiationError> { + tracing::trace!(target: LOG_TARGET, "get noise final KEM message (<- sks)"); + + let NoiseState::Handshake(ref mut session) = self.noise else { + tracing::error!(target: LOG_TARGET, "invalid state to write final KEM message"); + debug_assert!(false); + return Err(NegotiationError::StateMismatch); + }; + + // pqXX message 4: <- sks (KEM ciphertext, empty payload) + let mut buffer = vec![0u8; HANDSHAKE_BUFFER_SIZE]; + let nwritten = session.write_message(&[], &mut buffer)?; + buffer.truncate(nwritten); + + let size = nwritten as u16; + let mut size = size.to_be_bytes().to_vec(); + size.append(&mut buffer); + + Ok(size) + } + + /// Read handshake message from the wire. + async fn read_handshake_message( + &mut self, + io: &mut T, + ) -> Result { + let mut size = BytesMut::zeroed(2); + io.read_exact(&mut size).await?; + let size = size.get_u16(); + + let mut message = BytesMut::zeroed(size as usize); + io.read_exact(&mut message).await?; + + let mut out = BytesMut::new(); + out.resize(message.len() + HANDSHAKE_BUFFER_SIZE, 0u8); + + let NoiseState::Handshake(ref mut session) = self.noise else { + tracing::error!(target: LOG_TARGET, "invalid state to read handshake message"); + debug_assert!(false); + return Err(NegotiationError::StateMismatch); + }; + + let nread = session.read_message(&message, &mut out)?; + out.truncate(nread); + + Ok(out.freeze()) + } + + /// Read a message (works in both handshake and transport mode). + fn read_message(&mut self, message: &[u8], out: &mut [u8]) -> Result { + match &mut self.noise { + NoiseState::Handshake(session) => session.read_message(message, out), + NoiseState::Transport(transport) => transport.read_message(message, out), + } + } + + /// Write a message (works in both handshake and transport mode). + fn write_message(&mut self, message: &[u8], out: &mut [u8]) -> Result { + match &mut self.noise { + NoiseState::Handshake(session) => session.write_message(message, out), + NoiseState::Transport(transport) => transport.write_message(message, out), + } + } + + /// Get the remote's static KEM public key. + fn get_remote_static(&self) -> Result, NegotiationError> { + let NoiseState::Handshake(ref session) = self.noise else { + tracing::error!(target: LOG_TARGET, "invalid state to get remote public key"); + return Err(NegotiationError::StateMismatch); + }; + + session.get_remote_static().ok_or_else(|| { + tracing::error!(target: LOG_TARGET, "expected remote public key at the end of pqXX session"); + NegotiationError::IoError(std::io::ErrorKind::InvalidData) + }) + } + + /// Convert Noise into transport mode. + fn into_transport(self) -> Result { + let transport = match self.noise { + NoiseState::Handshake(session) => session.into_transport_mode()?, + NoiseState::Transport(_) => return Err(NegotiationError::StateMismatch), + }; + + Ok(NoiseContext { + kem_keypair: self.kem_keypair, + payload: self.payload, + role: self.role, + noise: NoiseState::Transport(transport), + }) + } } enum ReadState { - ReadData { - max_read: usize, - }, - ReadFrameLen, - ProcessNextFrame { - pending: Option>, - offset: usize, - size: usize, - frame_size: usize, - decrypted: bool, - }, + ReadData { + max_read: usize, + }, + ReadFrameLen, + ProcessNextFrame { + pending: Option>, + offset: usize, + size: usize, + frame_size: usize, + decrypted: bool, + }, } enum WriteState { - /// No pending encrypted data, ready to accept new writes - Idle, - /// Writing encrypted data to socket - Writing { - /// Offset into encrypt_buffer that's been written to socket - offset: usize, - /// Total length of encrypted data in encrypt_buffer - encrypted_len: usize, - }, + /// No pending encrypted data, ready to accept new writes + Idle, + /// Writing encrypted data to socket + Writing { + /// Offset into encrypt_buffer that's been written to socket + offset: usize, + /// Total length of encrypted data in encrypt_buffer + encrypted_len: usize, + }, } pub struct NoiseSocket { - io: S, - noise: NoiseContext, - current_frame_size: Option, - write_state: WriteState, - encrypt_buffer: Vec, - offset: usize, - nread: usize, - read_state: ReadState, - read_buffer: Vec, - canonical_max_read: usize, - decrypt_buffer: Option>, - peer: PeerId, - ty: HandshakeTransport, + io: S, + noise: NoiseContext, + current_frame_size: Option, + write_state: WriteState, + encrypt_buffer: Vec, + offset: usize, + nread: usize, + read_state: ReadState, + read_buffer: Vec, + canonical_max_read: usize, + decrypt_buffer: Option>, + peer: PeerId, + ty: HandshakeTransport, } impl NoiseSocket { - fn new( - io: S, - noise: NoiseContext, - max_read_ahead_factor: usize, - max_write_buffer_size: usize, - peer: PeerId, - ty: HandshakeTransport, - ) -> Self { - Self { - io, - noise, - read_buffer: vec![ - 0u8; - max_read_ahead_factor * MAX_NOISE_MSG_LEN + (2 + MAX_NOISE_MSG_LEN) - ], - nread: 0usize, - offset: 0usize, - current_frame_size: None, - write_state: WriteState::Idle, - encrypt_buffer: vec![0u8; max_write_buffer_size * (MAX_NOISE_MSG_LEN + 2)], - decrypt_buffer: Some(vec![0u8; MAX_FRAME_LEN]), - read_state: ReadState::ReadData { - max_read: max_read_ahead_factor * MAX_NOISE_MSG_LEN, - }, - canonical_max_read: max_read_ahead_factor * MAX_NOISE_MSG_LEN, - peer, - ty, - } - } - - fn compact_read_buffer(&mut self, remaining: usize) { - if remaining > 0 && self.offset != 0 { - self.read_buffer.copy_within(self.offset..self.nread, 0); - } - - self.nread = remaining; - self.offset = 0; - } - - fn read_more(&mut self) { - self.read_state = ReadState::ReadData { - max_read: std::cmp::min(self.read_buffer.len(), self.nread + self.canonical_max_read), - }; - } - - fn reset_read_state(&mut self, remaining: usize) { - self.compact_read_buffer(remaining); - - self.current_frame_size = None; - self.read_more(); - } + fn new( + io: S, + noise: NoiseContext, + max_read_ahead_factor: usize, + max_write_buffer_size: usize, + peer: PeerId, + ty: HandshakeTransport, + ) -> Self { + Self { + io, + noise, + read_buffer: vec![ + 0u8; + max_read_ahead_factor * MAX_NOISE_MSG_LEN + (2 + MAX_NOISE_MSG_LEN) + ], + nread: 0usize, + offset: 0usize, + current_frame_size: None, + write_state: WriteState::Idle, + encrypt_buffer: vec![0u8; max_write_buffer_size * (MAX_NOISE_MSG_LEN + 2)], + decrypt_buffer: Some(vec![0u8; MAX_FRAME_LEN]), + read_state: ReadState::ReadData { max_read: max_read_ahead_factor * MAX_NOISE_MSG_LEN }, + canonical_max_read: max_read_ahead_factor * MAX_NOISE_MSG_LEN, + peer, + ty, + } + } + + fn compact_read_buffer(&mut self, remaining: usize) { + if remaining > 0 && self.offset != 0 { + self.read_buffer.copy_within(self.offset..self.nread, 0); + } + + self.nread = remaining; + self.offset = 0; + } + + fn read_more(&mut self) { + self.read_state = ReadState::ReadData { + max_read: std::cmp::min(self.read_buffer.len(), self.nread + self.canonical_max_read), + }; + } + + fn reset_read_state(&mut self, remaining: usize) { + self.compact_read_buffer(remaining); + + self.current_frame_size = None; + self.read_more(); + } } impl AsyncRead for NoiseSocket { - fn poll_read( - self: Pin<&mut Self>, - cx: &mut Context<'_>, - buf: &mut [u8], - ) -> Poll> { - let this = Pin::into_inner(self); - - if buf.is_empty() { - return Poll::Ready(Ok(0)); - } - - loop { - match this.read_state { - ReadState::ReadData { max_read } => { - let nread = match Pin::new(&mut this.io) - .poll_read(cx, &mut this.read_buffer[this.nread..max_read]) - { - Poll::Pending => return Poll::Pending, - Poll::Ready(Err(error)) => return Poll::Ready(Err(error)), - Poll::Ready(Ok(nread)) => match nread == 0 { - true => return Poll::Ready(Err(io::ErrorKind::UnexpectedEof.into())), - false => nread, - }, - }; - - tracing::trace!( - target: LOG_TARGET, - ?nread, - peer = ?this.peer, - transport = ?this.ty, - "read encrypted bytes", - ); - - this.nread += nread; - // Check if we were waiting for more data for an existing frame - if let Some(frame_size) = this.current_frame_size { - // Check if we have enough data now - let remaining = this.nread - this.offset; - if remaining >= frame_size { - this.read_state = ReadState::ProcessNextFrame { - pending: this.decrypt_buffer.take(), - offset: 0usize, - size: 0usize, - frame_size, - decrypted: false, - }; - } - // else stay in ReadData to get more - } else { - this.read_state = ReadState::ReadFrameLen; - } - } - ReadState::ReadFrameLen => { - // try to read the frame length - let remaining = this.nread - this.offset; - - if remaining < 2 { - this.reset_read_state(remaining); - continue; - } - - let frame_len = u16::from_be_bytes([ - this.read_buffer[this.offset], - this.read_buffer[this.offset + 1], - ]) as usize; - - // consume the frame length - this.offset += 2; - - // set the frame size and switch to processing state - this.current_frame_size = Some(frame_len); - this.read_state = ReadState::ProcessNextFrame { - pending: this.decrypt_buffer.take(), - offset: 0usize, - size: 0usize, - frame_size: frame_len, - decrypted: false, - }; - } - ReadState::ProcessNextFrame { - ref mut pending, - ref mut offset, - ref mut size, - frame_size, - ref mut decrypted, - } => { - // Decrypt only once. If the caller did not consume all plaintext in the - // previous poll, serve the pending plaintext before reading more ciphertext. - if !*decrypted { - let remaining = this.nread - this.offset; - - // need to read more bytes to complete the frame - if remaining < frame_size { - // Put pending buffer back before switching states - if let Some(buf) = pending.take() { - this.decrypt_buffer = Some(buf); - } - this.compact_read_buffer(remaining); - this.current_frame_size = Some(frame_size); - this.read_more(); - continue; - } - - let read_end = this.offset + frame_size; - let pending = pending.as_mut().expect("to have a buffer"); - - let ciphertext = &this.read_buffer[this.offset..read_end]; - tracing::trace!( - target: LOG_TARGET, - frame_size = ?frame_size, - ciphertext_len = ciphertext.len(), - first_bytes = ?&ciphertext[..std::cmp::min(32, ciphertext.len())], - peer = ?this.peer, - transport = ?this.ty, - "attempting to decrypt frame" - ); - - match this.noise.read_message(ciphertext, pending) { - Ok(nread) => { - tracing::trace!( - target: LOG_TARGET, - ?nread, - ?frame_size, - peer = ?this.peer, - transport = ?this.ty, - "decrypted bytes" - ); - - this.offset += frame_size; - *size = nread; - *decrypted = true; - } - Err(error) => { - tracing::error!( - target: LOG_TARGET, - ?error, - ?frame_size, - ciphertext_len = ciphertext.len(), - first_bytes = ?&ciphertext[..std::cmp::min(32, ciphertext.len())], - peer = ?this.peer, - transport = ?this.ty, - "failed to decrypt" - ); - return Poll::Ready(Err(io::ErrorKind::InvalidData.into())); - } - } - } - - // pending buffer already decrypted, - // copy as much as possible to user's buffer - let pending_ref = pending.as_ref().expect("to have a buffer"); - let to_copy = std::cmp::min(*size - *offset, buf.len()); - buf[..to_copy].copy_from_slice(&pending_ref[*offset..*offset + to_copy]); - *offset += to_copy; - - // if pending buffer was exhausted, - // process next frame if there is one - if *offset == *size { - // Clear current frame size since we're done with this frame - this.current_frame_size = None; - - // Put the decrypt buffer back before transitioning - // Note: pending is &mut Option> from the match - this.decrypt_buffer = pending.take(); - - let remaining = this.nread - this.offset; - - match remaining { - // all read bytes have been consumed, need to read more data - 0 | 1 => { - this.reset_read_state(remaining); - } - // at least two bytes have been read, - // check if there's another full frame ready to be parsed - _ => this.read_state = ReadState::ReadFrameLen, - } - - if to_copy == 0 { - continue; - } - } - - return Poll::Ready(Ok(to_copy)); - } - } - } - } + fn poll_read( + self: Pin<&mut Self>, + cx: &mut Context<'_>, + buf: &mut [u8], + ) -> Poll> { + let this = Pin::into_inner(self); + + if buf.is_empty() { + return Poll::Ready(Ok(0)); + } + + loop { + match this.read_state { + ReadState::ReadData { max_read } => { + let nread = match Pin::new(&mut this.io) + .poll_read(cx, &mut this.read_buffer[this.nread..max_read]) + { + Poll::Pending => return Poll::Pending, + Poll::Ready(Err(error)) => return Poll::Ready(Err(error)), + Poll::Ready(Ok(nread)) => match nread == 0 { + true => return Poll::Ready(Err(io::ErrorKind::UnexpectedEof.into())), + false => nread, + }, + }; + + tracing::trace!( + target: LOG_TARGET, + ?nread, + peer = ?this.peer, + transport = ?this.ty, + "read encrypted bytes", + ); + + this.nread += nread; + // Check if we were waiting for more data for an existing frame + if let Some(frame_size) = this.current_frame_size { + // Check if we have enough data now + let remaining = this.nread - this.offset; + if remaining >= frame_size { + this.read_state = ReadState::ProcessNextFrame { + pending: this.decrypt_buffer.take(), + offset: 0usize, + size: 0usize, + frame_size, + decrypted: false, + }; + } + // else stay in ReadData to get more + } else { + this.read_state = ReadState::ReadFrameLen; + } + }, + ReadState::ReadFrameLen => { + // try to read the frame length + let remaining = this.nread - this.offset; + + if remaining < 2 { + this.reset_read_state(remaining); + continue; + } + + let frame_len = u16::from_be_bytes([ + this.read_buffer[this.offset], + this.read_buffer[this.offset + 1], + ]) as usize; + + // consume the frame length + this.offset += 2; + + // set the frame size and switch to processing state + this.current_frame_size = Some(frame_len); + this.read_state = ReadState::ProcessNextFrame { + pending: this.decrypt_buffer.take(), + offset: 0usize, + size: 0usize, + frame_size: frame_len, + decrypted: false, + }; + }, + ReadState::ProcessNextFrame { + ref mut pending, + ref mut offset, + ref mut size, + frame_size, + ref mut decrypted, + } => { + // Decrypt only once. If the caller did not consume all plaintext in the + // previous poll, serve the pending plaintext before reading more ciphertext. + if !*decrypted { + let remaining = this.nread - this.offset; + + // need to read more bytes to complete the frame + if remaining < frame_size { + // Put pending buffer back before switching states + if let Some(buf) = pending.take() { + this.decrypt_buffer = Some(buf); + } + this.compact_read_buffer(remaining); + this.current_frame_size = Some(frame_size); + this.read_more(); + continue; + } + + let read_end = this.offset + frame_size; + let pending = pending.as_mut().expect("to have a buffer"); + + let ciphertext = &this.read_buffer[this.offset..read_end]; + tracing::trace!( + target: LOG_TARGET, + frame_size = ?frame_size, + ciphertext_len = ciphertext.len(), + first_bytes = ?&ciphertext[..std::cmp::min(32, ciphertext.len())], + peer = ?this.peer, + transport = ?this.ty, + "attempting to decrypt frame" + ); + + match this.noise.read_message(ciphertext, pending) { + Ok(nread) => { + tracing::trace!( + target: LOG_TARGET, + ?nread, + ?frame_size, + peer = ?this.peer, + transport = ?this.ty, + "decrypted bytes" + ); + + this.offset += frame_size; + *size = nread; + *decrypted = true; + }, + Err(error) => { + tracing::error!( + target: LOG_TARGET, + ?error, + ?frame_size, + ciphertext_len = ciphertext.len(), + first_bytes = ?&ciphertext[..std::cmp::min(32, ciphertext.len())], + peer = ?this.peer, + transport = ?this.ty, + "failed to decrypt" + ); + return Poll::Ready(Err(io::ErrorKind::InvalidData.into())); + }, + } + } + + // pending buffer already decrypted, + // copy as much as possible to user's buffer + let pending_ref = pending.as_ref().expect("to have a buffer"); + let to_copy = std::cmp::min(*size - *offset, buf.len()); + buf[..to_copy].copy_from_slice(&pending_ref[*offset..*offset + to_copy]); + *offset += to_copy; + + // if pending buffer was exhausted, + // process next frame if there is one + if *offset == *size { + // Clear current frame size since we're done with this frame + this.current_frame_size = None; + + // Put the decrypt buffer back before transitioning + // Note: pending is &mut Option> from the match + this.decrypt_buffer = pending.take(); + + let remaining = this.nread - this.offset; + + match remaining { + // all read bytes have been consumed, need to read more data + 0 | 1 => { + this.reset_read_state(remaining); + }, + // at least two bytes have been read, + // check if there's another full frame ready to be parsed + _ => this.read_state = ReadState::ReadFrameLen, + } + + if to_copy == 0 { + continue; + } + } + + return Poll::Ready(Ok(to_copy)); + }, + } + } + } } impl AsyncWrite for NoiseSocket { - fn poll_write( - self: Pin<&mut Self>, - cx: &mut Context<'_>, - buf: &[u8], - ) -> Poll> { - let this = Pin::into_inner(self); - - // Step 1: Try to drain any pending encrypted data first - let mut buffer_offset = 0usize; - if let WriteState::Writing { - offset, - encrypted_len, - } = &mut this.write_state - { - loop { - match futures::ready!(Pin::new(&mut this.io) - .poll_write(cx, &this.encrypt_buffer[*offset..*encrypted_len])) - { - Ok(0) => return Poll::Ready(Err(io::ErrorKind::WriteZero.into())), - Ok(n) => { - *offset += n; - if offset == encrypted_len { - // All pending data sent, reset to idle - this.write_state = WriteState::Idle; - break; - } - } - Err(e) => return Poll::Ready(Err(e)), - } - } - } - - // Step 2: Buffer has been drained (or was empty). - // Encrypt new data into the buffer. - if buf.is_empty() { - return Poll::Ready(Ok(0)); - } - - let mut total_plaintext = 0usize; - // Encrypt as many chunks as fit in the remaining space - for chunk in buf.chunks(MAX_FRAME_LEN) { - // Check space for this specific chunk + overhead - // Note: overhead is 2 bytes length + 16 bytes auth tag - let overhead = 2 + NOISE_EXTRA_ENCRYPT_SPACE; - if buffer_offset + chunk.len() + overhead > this.encrypt_buffer.len() { - // Buffer is full, stop packing - break; - } - - match this.noise.write_message(chunk, &mut this.encrypt_buffer[buffer_offset + 2..]) { - Ok(nwritten) => { - // Write frame length prefix - this.encrypt_buffer[buffer_offset] = (nwritten >> 8) as u8; - this.encrypt_buffer[buffer_offset + 1] = (nwritten & 0xff) as u8; - - tracing::trace!( - target: LOG_TARGET, - plaintext_len = chunk.len(), - ciphertext_len = nwritten, - frame_len = nwritten, - first_plaintext_bytes = ?&chunk[..std::cmp::min(32, chunk.len())], - peer = ?this.peer, - transport = ?this.ty, - "encrypted frame" - ); - - buffer_offset += nwritten + 2; - total_plaintext += chunk.len(); - } - Err(error) => { - tracing::error!(target: LOG_TARGET, ?error, "failed to encrypt"); - return Poll::Ready(Err(io::ErrorKind::InvalidData.into())); - } - } - } - if total_plaintext == 0 { - // No data could be buffered because the buffer is full. - return Poll::Pending; - } - - // Step 3. Adjust state to writing and return number of bytes accepted. - match this.write_state { - WriteState::Idle => { - this.write_state = WriteState::Writing { - offset: 0, - encrypted_len: buffer_offset, - }; - } - WriteState::Writing { - ref mut encrypted_len, - .. - } => { - *encrypted_len = buffer_offset; - } - } - - Poll::Ready(Ok(total_plaintext)) - } - - fn poll_flush(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll> { - let this = Pin::into_inner(self); - - // Flush internal buffer of encrypted messages - if let WriteState::Writing { - offset, - encrypted_len, - } = &mut this.write_state - { - loop { - match futures::ready!(Pin::new(&mut this.io) - .poll_write(cx, &this.encrypt_buffer[*offset..*encrypted_len])) - { - Ok(0) => return Poll::Ready(Err(io::ErrorKind::WriteZero.into())), - Ok(n) => { - *offset += n; - if offset == encrypted_len { - this.write_state = WriteState::Idle; - break; - } - } - Err(e) => return Poll::Ready(Err(e)), - } - } - } - - // Flush underlying socket - Pin::new(&mut this.io).poll_flush(cx) - } - - fn poll_close(mut self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll> { - // Ensure buffer is flushed before closing - futures::ready!(self.as_mut().poll_flush(cx))?; - - Pin::new(&mut self.io).poll_close(cx) - } + fn poll_write( + self: Pin<&mut Self>, + cx: &mut Context<'_>, + buf: &[u8], + ) -> Poll> { + let this = Pin::into_inner(self); + + // Step 1: Try to drain any pending encrypted data first + let mut buffer_offset = 0usize; + if let WriteState::Writing { offset, encrypted_len } = &mut this.write_state { + loop { + match futures::ready!(Pin::new(&mut this.io) + .poll_write(cx, &this.encrypt_buffer[*offset..*encrypted_len])) + { + Ok(0) => return Poll::Ready(Err(io::ErrorKind::WriteZero.into())), + Ok(n) => { + *offset += n; + if offset == encrypted_len { + // All pending data sent, reset to idle + this.write_state = WriteState::Idle; + break; + } + }, + Err(e) => return Poll::Ready(Err(e)), + } + } + } + + // Step 2: Buffer has been drained (or was empty). + // Encrypt new data into the buffer. + if buf.is_empty() { + return Poll::Ready(Ok(0)); + } + + let mut total_plaintext = 0usize; + // Encrypt as many chunks as fit in the remaining space + for chunk in buf.chunks(MAX_FRAME_LEN) { + // Check space for this specific chunk + overhead + // Note: overhead is 2 bytes length + 16 bytes auth tag + let overhead = 2 + NOISE_EXTRA_ENCRYPT_SPACE; + if buffer_offset + chunk.len() + overhead > this.encrypt_buffer.len() { + // Buffer is full, stop packing + break; + } + + match this.noise.write_message(chunk, &mut this.encrypt_buffer[buffer_offset + 2..]) { + Ok(nwritten) => { + // Write frame length prefix + this.encrypt_buffer[buffer_offset] = (nwritten >> 8) as u8; + this.encrypt_buffer[buffer_offset + 1] = (nwritten & 0xff) as u8; + + tracing::trace!( + target: LOG_TARGET, + plaintext_len = chunk.len(), + ciphertext_len = nwritten, + frame_len = nwritten, + first_plaintext_bytes = ?&chunk[..std::cmp::min(32, chunk.len())], + peer = ?this.peer, + transport = ?this.ty, + "encrypted frame" + ); + + buffer_offset += nwritten + 2; + total_plaintext += chunk.len(); + }, + Err(error) => { + tracing::error!(target: LOG_TARGET, ?error, "failed to encrypt"); + return Poll::Ready(Err(io::ErrorKind::InvalidData.into())); + }, + } + } + if total_plaintext == 0 { + // No data could be buffered because the buffer is full. + return Poll::Pending; + } + + // Step 3. Adjust state to writing and return number of bytes accepted. + match this.write_state { + WriteState::Idle => { + this.write_state = WriteState::Writing { offset: 0, encrypted_len: buffer_offset }; + }, + WriteState::Writing { ref mut encrypted_len, .. } => { + *encrypted_len = buffer_offset; + }, + } + + Poll::Ready(Ok(total_plaintext)) + } + + fn poll_flush(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll> { + let this = Pin::into_inner(self); + + // Flush internal buffer of encrypted messages + if let WriteState::Writing { offset, encrypted_len } = &mut this.write_state { + loop { + match futures::ready!(Pin::new(&mut this.io) + .poll_write(cx, &this.encrypt_buffer[*offset..*encrypted_len])) + { + Ok(0) => return Poll::Ready(Err(io::ErrorKind::WriteZero.into())), + Ok(n) => { + *offset += n; + if offset == encrypted_len { + this.write_state = WriteState::Idle; + break; + } + }, + Err(e) => return Poll::Ready(Err(e)), + } + } + } + + // Flush underlying socket + Pin::new(&mut this.io).poll_flush(cx) + } + + fn poll_close(mut self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll> { + // Ensure buffer is flushed before closing + futures::ready!(self.as_mut().poll_flush(cx))?; + + Pin::new(&mut self.io).poll_close(cx) + } } /// Parse the `PeerId` from received `NoiseHandshakePayload` and verify the payload signature. fn parse_and_verify_peer_id( - payload: handshake_schema::NoiseHandshakePayload, - kem_remote_pubkey: &[u8], + payload: handshake_schema::NoiseHandshakePayload, + kem_remote_pubkey: &[u8], ) -> Result { - let identity = payload.identity_key.ok_or(NegotiationError::PeerIdMissing)?; - let remote_public_key = RemotePublicKey::from_protobuf_encoding(&identity)?; - let remote_key_signature = - payload.identity_sig.ok_or(NegotiationError::BadSignature).inspect_err(|_err| { - tracing::debug!(target: LOG_TARGET, "payload without signature"); - })?; - - let peer_id = PeerId::from_public_key_protobuf(&identity); - - if !remote_public_key.verify( - &[STATIC_KEY_DOMAIN.as_bytes(), kem_remote_pubkey].concat(), - &remote_key_signature, - ) { - tracing::debug!( - target: LOG_TARGET, - ?peer_id, - "failed to verify remote public key signature" - ); - - return Err(NegotiationError::BadSignature); - } - - Ok(peer_id) + let identity = payload.identity_key.ok_or(NegotiationError::PeerIdMissing)?; + let remote_public_key = RemotePublicKey::from_protobuf_encoding(&identity)?; + let remote_key_signature = + payload.identity_sig.ok_or(NegotiationError::BadSignature).inspect_err(|_err| { + tracing::debug!(target: LOG_TARGET, "payload without signature"); + })?; + + let peer_id = PeerId::from_public_key_protobuf(&identity); + + if !remote_public_key + .verify(&[STATIC_KEY_DOMAIN.as_bytes(), kem_remote_pubkey].concat(), &remote_key_signature) + { + tracing::debug!( + target: LOG_TARGET, + ?peer_id, + "failed to verify remote public key signature" + ); + + return Err(NegotiationError::BadSignature); + } + + Ok(peer_id) } /// The type of the transport used for the crypto/noise protocol. @@ -814,182 +791,180 @@ fn parse_and_verify_peer_id( /// This is used for logging purposes. #[derive(Debug, Clone, Copy, PartialEq, Eq)] pub enum HandshakeTransport { - Tcp, - #[cfg(feature = "websocket")] - WebSocket, + Tcp, + #[cfg(feature = "websocket")] + WebSocket, } /// Perform Noise handshake using pqXX pattern (4 messages). pub async fn handshake( - mut io: S, - keypair: &Keypair, - role: Role, - max_read_ahead_factor: usize, - max_write_buffer_size: usize, - timeout: std::time::Duration, - ty: HandshakeTransport, + mut io: S, + keypair: &Keypair, + role: Role, + max_read_ahead_factor: usize, + max_write_buffer_size: usize, + timeout: std::time::Duration, + ty: HandshakeTransport, ) -> Result<(NoiseSocket, PeerId), NegotiationError> { - let handle_handshake = async move { - tracing::debug!(target: LOG_TARGET, ?role, ?ty, "start noise handshake (pqXX + ML-KEM 768)"); - - let mut noise = NoiseContext::new(keypair, role)?; - let payload = match role { - Role::Dialer => { - // pqXX Message 1: -> e (ephemeral KEM public key) - tracing::debug!(target: LOG_TARGET, "pqXX dialer: sending message 1 (-> e)"); - let first_message = noise.first_message(Role::Dialer)?; - tracing::debug!(target: LOG_TARGET, len = first_message.len(), "pqXX dialer: message 1 size"); - io.write_all(&first_message).await?; - io.flush().await?; - tracing::debug!(target: LOG_TARGET, "pqXX dialer: message 1 sent, waiting for message 2"); - - // pqXX Message 2: <- ekem, e, es + identity payload - let message = noise.read_handshake_message(&mut io).await?; - tracing::debug!(target: LOG_TARGET, len = message.len(), "pqXX dialer: received message 2"); - let payload = handshake_schema::NoiseHandshakePayload::decode(message) - .map_err(ParseError::from) - .map_err(|err| { - tracing::error!(target: LOG_TARGET, ?err, ?ty, "failed to decode remote identity message"); - err - })?; - tracing::debug!(target: LOG_TARGET, "pqXX dialer: message 2 decoded successfully"); - - // pqXX Message 3: -> skem, s, se + local identity payload - tracing::debug!(target: LOG_TARGET, "pqXX dialer: sending message 3 (-> skem, s, se)"); - let third_message = noise.second_message()?; - tracing::debug!(target: LOG_TARGET, len = third_message.len(), "pqXX dialer: message 3 size"); - io.write_all(&third_message).await?; - io.flush().await?; - tracing::debug!(target: LOG_TARGET, "pqXX dialer: message 3 sent, waiting for message 4"); - - // pqXX Message 4: <- sks (final KEM, empty payload) - let _final_message = noise.read_handshake_message(&mut io).await?; - tracing::debug!(target: LOG_TARGET, "pqXX dialer: received message 4, handshake complete"); - // Message 4 should be empty (or contain no identity payload) - - payload - } - Role::Listener => { - // pqXX Message 1: <- e (remote's ephemeral KEM public key) - tracing::debug!(target: LOG_TARGET, "pqXX listener: waiting for message 1"); - let _ = noise.read_handshake_message(&mut io).await?; - tracing::debug!(target: LOG_TARGET, "pqXX listener: received message 1"); - - // pqXX Message 2: -> ekem, e, es + local identity payload - tracing::debug!(target: LOG_TARGET, "pqXX listener: sending message 2"); - let second_message = noise.second_message()?; - io.write_all(&second_message).await?; - io.flush().await?; - tracing::debug!(target: LOG_TARGET, "pqXX listener: message 2 sent, waiting for message 3"); - - // pqXX Message 3: <- skem, s, se + remote identity payload - let message = noise.read_handshake_message(&mut io).await?; - tracing::debug!(target: LOG_TARGET, len = message.len(), "pqXX listener: received message 3"); - let payload = handshake_schema::NoiseHandshakePayload::decode(message) - .map_err(ParseError::from)?; - tracing::debug!(target: LOG_TARGET, "pqXX listener: message 3 decoded successfully"); - - // pqXX Message 4: -> sks (final KEM, empty payload) - tracing::debug!(target: LOG_TARGET, "pqXX listener: sending message 4 (-> sks)"); - let final_message = noise.final_kem_message()?; - io.write_all(&final_message).await?; - io.flush().await?; - tracing::debug!(target: LOG_TARGET, "pqXX listener: handshake complete"); - - payload - } - }; - - let kem_remote_pubkey = noise.get_remote_static()?; - let peer = parse_and_verify_peer_id(payload, &kem_remote_pubkey)?; - - Ok(( - NoiseSocket::new( - io, - noise.into_transport()?, - max_read_ahead_factor, - max_write_buffer_size, - peer, - ty, - ), - peer, - )) - }; - - match tokio::time::timeout(timeout, handle_handshake).await { - Err(_) => Err(NegotiationError::Timeout), - Ok(result) => result, - } + let handle_handshake = async move { + tracing::debug!(target: LOG_TARGET, ?role, ?ty, "start noise handshake (pqXX + ML-KEM 768)"); + + let mut noise = NoiseContext::new(keypair, role)?; + let payload = match role { + Role::Dialer => { + // pqXX Message 1: -> e (ephemeral KEM public key) + tracing::debug!(target: LOG_TARGET, "pqXX dialer: sending message 1 (-> e)"); + let first_message = noise.first_message(Role::Dialer)?; + tracing::debug!(target: LOG_TARGET, len = first_message.len(), "pqXX dialer: message 1 size"); + io.write_all(&first_message).await?; + io.flush().await?; + tracing::debug!(target: LOG_TARGET, "pqXX dialer: message 1 sent, waiting for message 2"); + + // pqXX Message 2: <- ekem, e, es + identity payload + let message = noise.read_handshake_message(&mut io).await?; + tracing::debug!(target: LOG_TARGET, len = message.len(), "pqXX dialer: received message 2"); + let payload = handshake_schema::NoiseHandshakePayload::decode(message) + .map_err(ParseError::from) + .map_err(|err| { + tracing::error!(target: LOG_TARGET, ?err, ?ty, "failed to decode remote identity message"); + err + })?; + tracing::debug!(target: LOG_TARGET, "pqXX dialer: message 2 decoded successfully"); + + // pqXX Message 3: -> skem, s, se + local identity payload + tracing::debug!(target: LOG_TARGET, "pqXX dialer: sending message 3 (-> skem, s, se)"); + let third_message = noise.second_message()?; + tracing::debug!(target: LOG_TARGET, len = third_message.len(), "pqXX dialer: message 3 size"); + io.write_all(&third_message).await?; + io.flush().await?; + tracing::debug!(target: LOG_TARGET, "pqXX dialer: message 3 sent, waiting for message 4"); + + // pqXX Message 4: <- sks (final KEM, empty payload) + let _final_message = noise.read_handshake_message(&mut io).await?; + tracing::debug!(target: LOG_TARGET, "pqXX dialer: received message 4, handshake complete"); + // Message 4 should be empty (or contain no identity payload) + + payload + }, + Role::Listener => { + // pqXX Message 1: <- e (remote's ephemeral KEM public key) + tracing::debug!(target: LOG_TARGET, "pqXX listener: waiting for message 1"); + let _ = noise.read_handshake_message(&mut io).await?; + tracing::debug!(target: LOG_TARGET, "pqXX listener: received message 1"); + + // pqXX Message 2: -> ekem, e, es + local identity payload + tracing::debug!(target: LOG_TARGET, "pqXX listener: sending message 2"); + let second_message = noise.second_message()?; + io.write_all(&second_message).await?; + io.flush().await?; + tracing::debug!(target: LOG_TARGET, "pqXX listener: message 2 sent, waiting for message 3"); + + // pqXX Message 3: <- skem, s, se + remote identity payload + let message = noise.read_handshake_message(&mut io).await?; + tracing::debug!(target: LOG_TARGET, len = message.len(), "pqXX listener: received message 3"); + let payload = handshake_schema::NoiseHandshakePayload::decode(message) + .map_err(ParseError::from)?; + tracing::debug!(target: LOG_TARGET, "pqXX listener: message 3 decoded successfully"); + + // pqXX Message 4: -> sks (final KEM, empty payload) + tracing::debug!(target: LOG_TARGET, "pqXX listener: sending message 4 (-> sks)"); + let final_message = noise.final_kem_message()?; + io.write_all(&final_message).await?; + io.flush().await?; + tracing::debug!(target: LOG_TARGET, "pqXX listener: handshake complete"); + + payload + }, + }; + + let kem_remote_pubkey = noise.get_remote_static()?; + let peer = parse_and_verify_peer_id(payload, &kem_remote_pubkey)?; + + Ok(( + NoiseSocket::new( + io, + noise.into_transport()?, + max_read_ahead_factor, + max_write_buffer_size, + peer, + ty, + ), + peer, + )) + }; + + match tokio::time::timeout(timeout, handle_handshake).await { + Err(_) => Err(NegotiationError::Timeout), + Ok(result) => result, + } } #[cfg(test)] mod tests { - use super::*; - use std::net::SocketAddr; - use tokio::net::{TcpListener, TcpStream}; - use tokio_util::compat::{TokioAsyncReadCompatExt, TokioAsyncWriteCompatExt}; - - #[tokio::test] - async fn noise_handshake() { - let _ = tracing_subscriber::fmt() - .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) - .try_init(); - - let keypair1 = Keypair::generate(); - let keypair2 = Keypair::generate(); - - let peer1_id = PeerId::from_public_key(&keypair1.public().into()); - let peer2_id = PeerId::from_public_key(&keypair2.public().into()); - - let listener = TcpListener::bind("[::1]:0".parse::().unwrap()).await.unwrap(); - - let (stream1, stream2) = tokio::join!( - TcpStream::connect(listener.local_addr().unwrap()), - listener.accept() - ); - let (io1, io2) = { - let io1 = TokioAsyncReadCompatExt::compat(stream1.unwrap()).into_inner(); - let io1 = Box::new(TokioAsyncWriteCompatExt::compat_write(io1)); - let io2 = TokioAsyncReadCompatExt::compat(stream2.unwrap().0).into_inner(); - let io2 = Box::new(TokioAsyncWriteCompatExt::compat_write(io2)); - - (io1, io2) - }; - - let (res1, res2) = tokio::join!( - handshake( - io1, - &keypair1, - Role::Dialer, - MAX_READ_AHEAD_FACTOR, - MAX_WRITE_BUFFER_SIZE, - std::time::Duration::from_secs(10), - HandshakeTransport::Tcp, - ), - handshake( - io2, - &keypair2, - Role::Listener, - MAX_READ_AHEAD_FACTOR, - MAX_WRITE_BUFFER_SIZE, - std::time::Duration::from_secs(10), - HandshakeTransport::Tcp, - ) - ); - let (mut res1, mut res2) = (res1.unwrap(), res2.unwrap()); - - assert_eq!(res1.1, peer2_id); - assert_eq!(res2.1, peer1_id); - - // verify the connection works by reading a string - let mut buf = vec![0u8; 512]; - - let sent = res1.0.write(b"hello, world").await.unwrap(); - res1.0.flush().await.unwrap(); - - let received = res2.0.read(&mut buf).await.unwrap(); - assert_eq!(sent, 12); - assert_eq!(received, 12); - assert_eq!(&buf[..received], b"hello, world"); - } + use super::*; + use std::net::SocketAddr; + use tokio::net::{TcpListener, TcpStream}; + use tokio_util::compat::{TokioAsyncReadCompatExt, TokioAsyncWriteCompatExt}; + + #[tokio::test] + async fn noise_handshake() { + let _ = tracing_subscriber::fmt() + .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) + .try_init(); + + let keypair1 = Keypair::generate(); + let keypair2 = Keypair::generate(); + + let peer1_id = PeerId::from_public_key(&keypair1.public().into()); + let peer2_id = PeerId::from_public_key(&keypair2.public().into()); + + let listener = TcpListener::bind("[::1]:0".parse::().unwrap()).await.unwrap(); + + let (stream1, stream2) = + tokio::join!(TcpStream::connect(listener.local_addr().unwrap()), listener.accept()); + let (io1, io2) = { + let io1 = TokioAsyncReadCompatExt::compat(stream1.unwrap()).into_inner(); + let io1 = Box::new(TokioAsyncWriteCompatExt::compat_write(io1)); + let io2 = TokioAsyncReadCompatExt::compat(stream2.unwrap().0).into_inner(); + let io2 = Box::new(TokioAsyncWriteCompatExt::compat_write(io2)); + + (io1, io2) + }; + + let (res1, res2) = tokio::join!( + handshake( + io1, + &keypair1, + Role::Dialer, + MAX_READ_AHEAD_FACTOR, + MAX_WRITE_BUFFER_SIZE, + std::time::Duration::from_secs(10), + HandshakeTransport::Tcp, + ), + handshake( + io2, + &keypair2, + Role::Listener, + MAX_READ_AHEAD_FACTOR, + MAX_WRITE_BUFFER_SIZE, + std::time::Duration::from_secs(10), + HandshakeTransport::Tcp, + ) + ); + let (mut res1, mut res2) = (res1.unwrap(), res2.unwrap()); + + assert_eq!(res1.1, peer2_id); + assert_eq!(res2.1, peer1_id); + + // verify the connection works by reading a string + let mut buf = vec![0u8; 512]; + + let sent = res1.0.write(b"hello, world").await.unwrap(); + res1.0.flush().await.unwrap(); + + let received = res2.0.read(&mut buf).await.unwrap(); + assert_eq!(sent, 12); + assert_eq!(received, 12); + assert_eq!(&buf[..received], b"hello, world"); + } } diff --git a/client/litep2p/src/crypto/noise/protocol.rs b/client/litep2p/src/crypto/noise/protocol.rs index 90528580..6daca03a 100644 --- a/client/litep2p/src/crypto/noise/protocol.rs +++ b/client/litep2p/src/crypto/noise/protocol.rs @@ -26,12 +26,12 @@ //! post-quantum key encapsulation, providing ~192-bit security against quantum attacks. use clatter::{ - bytearray::ByteArray, - crypto::{cipher::ChaChaPoly, hash::Sha256, kem::rust_crypto_ml_kem::MlKem768}, - handshakepattern::noise_pqxx, - traits::{Handshaker, Kem}, - transportstate::TransportState, - PqHandshake, + bytearray::ByteArray, + crypto::{cipher::ChaChaPoly, hash::Sha256, kem::rust_crypto_ml_kem::MlKem768}, + handshakepattern::noise_pqxx, + traits::{Handshaker, Kem}, + transportstate::TransportState, + PqHandshake, }; use rand::SeedableRng; use zeroize::Zeroize; @@ -40,212 +40,202 @@ use crate::error::NegotiationError; /// Clatter session that manages the pqXX handshake state with ML-KEM 768. pub struct ClatterSession { - rng: Box, - handshake: Option< - PqHandshake<'static, MlKem768, MlKem768, ChaChaPoly, Sha256, rand::rngs::StdRng>, - >, - static_keypair: - Option::PubKey, ::SecretKey>>, - prologue: Vec, - is_initiator: bool, + rng: Box, + handshake: + Option>, + static_keypair: + Option::PubKey, ::SecretKey>>, + prologue: Vec, + is_initiator: bool, } impl std::fmt::Debug for ClatterSession { - fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result { - f.debug_struct("ClatterSession") - .field("is_initiator", &self.is_initiator) - .field("prologue_len", &self.prologue.len()) - .field("handshake_initialized", &self.handshake.is_some()) - .finish() - } + fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result { + f.debug_struct("ClatterSession") + .field("is_initiator", &self.is_initiator) + .field("prologue_len", &self.prologue.len()) + .field("handshake_initialized", &self.handshake.is_some()) + .finish() + } } impl ClatterSession { - /// Create a new Clatter session for the pqXX handshake pattern. - /// - /// # Arguments - /// * `prologue` - Optional prologue data to bind to the handshake - /// * `is_initiator` - Whether this is the initiator (dialer) or responder (listener) - /// * `static_keypair` - The static ML-KEM 768 keypair for authentication - pub fn new( - prologue: &[u8], - is_initiator: bool, - static_keypair: &Keypair, - ) -> Result { - let kem_secret = - ::SecretKey::from_slice(static_keypair.secret.as_ref()); - let kem_public = - ::PubKey::from_slice(static_keypair.public.as_ref()); - - let clatter_keypair = clatter::KeyPair { - public: kem_public, - secret: kem_secret, - }; - - Ok(Self { - rng: Box::new(rand::rngs::StdRng::from_entropy()), - handshake: None, - static_keypair: Some(clatter_keypair), - prologue: prologue.to_vec(), - is_initiator, - }) - } - - /// Ensure the handshake is initialized. - fn ensure_handshake_initialized(&mut self) -> Result<(), NegotiationError> { - if self.handshake.is_none() { - let rng_ptr = self.rng.as_mut() as *mut rand::rngs::StdRng; - - // SAFETY: We're creating a 'static reference to the RNG. - // This is safe because: - // 1. The RNG is stored in a Box, so it has a stable address - // 2. The handshake will not outlive the session struct - // 3. We only create one handshake per session - let rng_ref: &'static mut rand::rngs::StdRng = unsafe { &mut *rng_ptr }; - - let handshake = - PqHandshake::::new( - noise_pqxx(), - &self.prologue, - self.is_initiator, - self.static_keypair.clone(), - None, // No pre-shared key - None, // No remote static key (XX pattern) - None, // No remote ephemeral key - rng_ref, - ) - .map_err(|e| { - NegotiationError::Clatter(format!("Failed to create pqXX handshake: {:?}", e)) - })?; - - self.handshake = Some(handshake); - } - Ok(()) - } - - /// Write a handshake message. - pub fn write_message( - &mut self, - payload: &[u8], - message: &mut [u8], - ) -> Result { - self.ensure_handshake_initialized()?; - - let handshake = self - .handshake - .as_mut() - .ok_or_else(|| NegotiationError::Clatter("Handshake not initialized".to_string()))?; - - handshake - .write_message(payload, message) - .map_err(|e| NegotiationError::Clatter(format!("pqXX write failed: {:?}", e))) - } - - /// Read a handshake message. - pub fn read_message( - &mut self, - message: &[u8], - payload: &mut [u8], - ) -> Result { - self.ensure_handshake_initialized()?; - - let handshake = self - .handshake - .as_mut() - .ok_or_else(|| NegotiationError::Clatter("Handshake not initialized".to_string()))?; - - handshake - .read_message(message, payload) - .map_err(|e| NegotiationError::Clatter(format!("pqXX read failed: {:?}", e))) - } - - /// Get the remote's static public key. - pub fn get_remote_static(&self) -> Option> { - self.handshake - .as_ref()? - .get_remote_static() - .map(|k| k.as_slice().to_vec()) - } - - /// Convert to transport state after handshake completion. - pub fn into_transport_mode(mut self) -> Result { - self.ensure_handshake_initialized()?; - - let handshake = self - .handshake - .take() - .ok_or_else(|| NegotiationError::Clatter("Handshake not initialized".to_string()))?; - - let transport = handshake.finalize().map_err(|e| { - NegotiationError::Clatter(format!("Failed to finalize pqXX handshake: {:?}", e)) - })?; - - Ok(ClatterTransport(Box::new(transport))) - } + /// Create a new Clatter session for the pqXX handshake pattern. + /// + /// # Arguments + /// * `prologue` - Optional prologue data to bind to the handshake + /// * `is_initiator` - Whether this is the initiator (dialer) or responder (listener) + /// * `static_keypair` - The static ML-KEM 768 keypair for authentication + pub fn new( + prologue: &[u8], + is_initiator: bool, + static_keypair: &Keypair, + ) -> Result { + let kem_secret = ::SecretKey::from_slice(static_keypair.secret.as_ref()); + let kem_public = ::PubKey::from_slice(static_keypair.public.as_ref()); + + let clatter_keypair = clatter::KeyPair { public: kem_public, secret: kem_secret }; + + Ok(Self { + rng: Box::new(rand::rngs::StdRng::from_entropy()), + handshake: None, + static_keypair: Some(clatter_keypair), + prologue: prologue.to_vec(), + is_initiator, + }) + } + + /// Ensure the handshake is initialized. + fn ensure_handshake_initialized(&mut self) -> Result<(), NegotiationError> { + if self.handshake.is_none() { + let rng_ptr = self.rng.as_mut() as *mut rand::rngs::StdRng; + + // SAFETY: We're creating a 'static reference to the RNG. + // This is safe because: + // 1. The RNG is stored in a Box, so it has a stable address + // 2. The handshake will not outlive the session struct + // 3. We only create one handshake per session + let rng_ref: &'static mut rand::rngs::StdRng = unsafe { &mut *rng_ptr }; + + let handshake = PqHandshake::::new( + noise_pqxx(), + &self.prologue, + self.is_initiator, + self.static_keypair.clone(), + None, // No pre-shared key + None, // No remote static key (XX pattern) + None, // No remote ephemeral key + rng_ref, + ) + .map_err(|e| { + NegotiationError::Clatter(format!("Failed to create pqXX handshake: {:?}", e)) + })?; + + self.handshake = Some(handshake); + } + Ok(()) + } + + /// Write a handshake message. + pub fn write_message( + &mut self, + payload: &[u8], + message: &mut [u8], + ) -> Result { + self.ensure_handshake_initialized()?; + + let handshake = self + .handshake + .as_mut() + .ok_or_else(|| NegotiationError::Clatter("Handshake not initialized".to_string()))?; + + handshake + .write_message(payload, message) + .map_err(|e| NegotiationError::Clatter(format!("pqXX write failed: {:?}", e))) + } + + /// Read a handshake message. + pub fn read_message( + &mut self, + message: &[u8], + payload: &mut [u8], + ) -> Result { + self.ensure_handshake_initialized()?; + + let handshake = self + .handshake + .as_mut() + .ok_or_else(|| NegotiationError::Clatter("Handshake not initialized".to_string()))?; + + handshake + .read_message(message, payload) + .map_err(|e| NegotiationError::Clatter(format!("pqXX read failed: {:?}", e))) + } + + /// Get the remote's static public key. + pub fn get_remote_static(&self) -> Option> { + self.handshake.as_ref()?.get_remote_static().map(|k| k.as_slice().to_vec()) + } + + /// Convert to transport state after handshake completion. + pub fn into_transport_mode(mut self) -> Result { + self.ensure_handshake_initialized()?; + + let handshake = self + .handshake + .take() + .ok_or_else(|| NegotiationError::Clatter("Handshake not initialized".to_string()))?; + + let transport = handshake.finalize().map_err(|e| { + NegotiationError::Clatter(format!("Failed to finalize pqXX handshake: {:?}", e)) + })?; + + Ok(ClatterTransport(Box::new(transport))) + } } /// Transport state after handshake completion. pub struct ClatterTransport(Box>); impl std::fmt::Debug for ClatterTransport { - fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result { - f.debug_struct("ClatterTransport").finish() - } + fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result { + f.debug_struct("ClatterTransport").finish() + } } impl ClatterTransport { - /// Write a transport message (encrypt). - pub fn write_message( - &mut self, - plaintext: &[u8], - ciphertext: &mut [u8], - ) -> Result { - self.0.send(plaintext, ciphertext).map_err(|e| { - NegotiationError::Clatter(format!("Transport write failed: {:?}", e)) - }) - } - - /// Read a transport message (decrypt). - pub fn read_message( - &mut self, - ciphertext: &[u8], - plaintext: &mut [u8], - ) -> Result { - self.0.receive(ciphertext, plaintext).map_err(|e| { - NegotiationError::Clatter(format!("Transport read failed: {:?}", e)) - }) - } + /// Write a transport message (encrypt). + pub fn write_message( + &mut self, + plaintext: &[u8], + ciphertext: &mut [u8], + ) -> Result { + self.0 + .send(plaintext, ciphertext) + .map_err(|e| NegotiationError::Clatter(format!("Transport write failed: {:?}", e))) + } + + /// Read a transport message (decrypt). + pub fn read_message( + &mut self, + ciphertext: &[u8], + plaintext: &mut [u8], + ) -> Result { + self.0 + .receive(ciphertext, plaintext) + .map_err(|e| NegotiationError::Clatter(format!("Transport read failed: {:?}", e))) + } } /// ML-KEM 768 keypair for Noise static keys. #[derive(Clone)] pub struct Keypair { - pub secret: SecretKey, - pub public: PublicKey, + pub secret: SecretKey, + pub public: PublicKey, } impl Keypair { - /// Generate a new ML-KEM 768 keypair. - pub fn new() -> Self { - let mut rng = rand::thread_rng(); - let keypair = MlKem768::genkey(&mut rng).expect("ML-KEM key generation should not fail"); + /// Generate a new ML-KEM 768 keypair. + pub fn new() -> Self { + let mut rng = rand::thread_rng(); + let keypair = MlKem768::genkey(&mut rng).expect("ML-KEM key generation should not fail"); - let secret = SecretKey(keypair.secret.as_slice().to_vec()); - let public = PublicKey(keypair.public.as_slice().to_vec()); + let secret = SecretKey(keypair.secret.as_slice().to_vec()); + let public = PublicKey(keypair.public.as_slice().to_vec()); - Keypair { secret, public } - } + Keypair { secret, public } + } - /// Get the public key. - pub fn public(&self) -> &PublicKey { - &self.public - } + /// Get the public key. + pub fn public(&self) -> &PublicKey { + &self.public + } } impl Default for Keypair { - fn default() -> Self { - Self::new() - } + fn default() -> Self { + Self::new() + } } /// ML-KEM 768 secret key. @@ -253,15 +243,15 @@ impl Default for Keypair { pub struct SecretKey(Vec); impl Drop for SecretKey { - fn drop(&mut self) { - self.0.zeroize() - } + fn drop(&mut self) { + self.0.zeroize() + } } impl AsRef<[u8]> for SecretKey { - fn as_ref(&self) -> &[u8] { - &self.0 - } + fn as_ref(&self) -> &[u8] { + &self.0 + } } /// ML-KEM 768 public key. @@ -269,123 +259,117 @@ impl AsRef<[u8]> for SecretKey { pub struct PublicKey(Vec); impl AsRef<[u8]> for PublicKey { - fn as_ref(&self) -> &[u8] { - &self.0 - } + fn as_ref(&self) -> &[u8] { + &self.0 + } } #[cfg(test)] mod tests { - use super::*; - - /// ML-KEM 768 public key size (FIPS 203) - const ML_KEM_768_PUBLIC_KEY_SIZE: usize = 1184; - - /// ML-KEM 768 secret key size (FIPS 203) - const ML_KEM_768_SECRET_KEY_SIZE: usize = 2400; - - /// Test helpers for ClatterSession - impl ClatterSession { - fn is_initiator(&self) -> bool { - if let Some(handshake) = &self.handshake { - handshake.is_initiator() - } else { - self.is_initiator - } - } - - fn is_finished(&self) -> bool { - self.handshake - .as_ref() - .map_or(false, |h| h.is_finished()) - } - } - - #[test] - fn keypair_generation_works() { - let keypair = Keypair::new(); - assert_eq!(keypair.secret.as_ref().len(), ML_KEM_768_SECRET_KEY_SIZE); - assert_eq!(keypair.public.as_ref().len(), ML_KEM_768_PUBLIC_KEY_SIZE); - } - - #[test] - fn session_creation_works() { - let keypair = Keypair::new(); - - let alice = ClatterSession::new(b"prologue", true, &keypair).unwrap(); - let bob = ClatterSession::new(b"prologue", false, &keypair).unwrap(); - - assert!(alice.is_initiator()); - assert!(!bob.is_initiator()); - } - - #[test] - fn full_handshake_works() { - let alice_keypair = Keypair::new(); - let bob_keypair = Keypair::new(); - - let mut alice = ClatterSession::new(b"prologue", true, &alice_keypair).unwrap(); - let mut bob = ClatterSession::new(b"prologue", false, &bob_keypair).unwrap(); - - // pqXX pattern: 4 messages - // Message 1: -> e - let mut msg1 = vec![0u8; 4096]; - let len1 = alice.write_message(&[], &mut msg1).unwrap(); - msg1.truncate(len1); - - let mut payload1 = vec![0u8; 4096]; - let _plen1 = bob.read_message(&msg1, &mut payload1).unwrap(); - - // Message 2: <- ekem, e, es - let mut msg2 = vec![0u8; 4096]; - let len2 = bob.write_message(&[], &mut msg2).unwrap(); - msg2.truncate(len2); - - let mut payload2 = vec![0u8; 4096]; - let _plen2 = alice.read_message(&msg2, &mut payload2).unwrap(); - - // Message 3: -> skem, s, se (with payload) - let mut msg3 = vec![0u8; 8192]; - let test_payload = b"hello from alice"; - let len3 = alice.write_message(test_payload, &mut msg3).unwrap(); - msg3.truncate(len3); - - let mut payload3 = vec![0u8; 4096]; - let plen3 = bob.read_message(&msg3, &mut payload3).unwrap(); - payload3.truncate(plen3); - assert_eq!(&payload3, test_payload); - - // Message 4: <- sks (final KEM, empty payload) - let mut msg4 = vec![0u8; 4096]; - let len4 = bob.write_message(&[], &mut msg4).unwrap(); - msg4.truncate(len4); - - let mut payload4 = vec![0u8; 4096]; - let plen4 = alice.read_message(&msg4, &mut payload4).unwrap(); - assert_eq!(plen4, 0); // Empty payload - - // Both should be finished - assert!(alice.is_finished()); - assert!(bob.is_finished()); - - // Convert to transport mode - let mut alice_transport = alice.into_transport_mode().unwrap(); - let mut bob_transport = bob.into_transport_mode().unwrap(); - - // Test transport - let plaintext = b"post-quantum secure message"; - let mut ciphertext = vec![0u8; plaintext.len() + 16]; // +16 for auth tag - let clen = alice_transport - .write_message(plaintext, &mut ciphertext) - .unwrap(); - ciphertext.truncate(clen); - - let mut decrypted = vec![0u8; plaintext.len()]; - let dlen = bob_transport - .read_message(&ciphertext, &mut decrypted) - .unwrap(); - decrypted.truncate(dlen); - - assert_eq!(&decrypted, plaintext); - } + use super::*; + + /// ML-KEM 768 public key size (FIPS 203) + const ML_KEM_768_PUBLIC_KEY_SIZE: usize = 1184; + + /// ML-KEM 768 secret key size (FIPS 203) + const ML_KEM_768_SECRET_KEY_SIZE: usize = 2400; + + /// Test helpers for ClatterSession + impl ClatterSession { + fn is_initiator(&self) -> bool { + if let Some(handshake) = &self.handshake { + handshake.is_initiator() + } else { + self.is_initiator + } + } + + fn is_finished(&self) -> bool { + self.handshake.as_ref().map_or(false, |h| h.is_finished()) + } + } + + #[test] + fn keypair_generation_works() { + let keypair = Keypair::new(); + assert_eq!(keypair.secret.as_ref().len(), ML_KEM_768_SECRET_KEY_SIZE); + assert_eq!(keypair.public.as_ref().len(), ML_KEM_768_PUBLIC_KEY_SIZE); + } + + #[test] + fn session_creation_works() { + let keypair = Keypair::new(); + + let alice = ClatterSession::new(b"prologue", true, &keypair).unwrap(); + let bob = ClatterSession::new(b"prologue", false, &keypair).unwrap(); + + assert!(alice.is_initiator()); + assert!(!bob.is_initiator()); + } + + #[test] + fn full_handshake_works() { + let alice_keypair = Keypair::new(); + let bob_keypair = Keypair::new(); + + let mut alice = ClatterSession::new(b"prologue", true, &alice_keypair).unwrap(); + let mut bob = ClatterSession::new(b"prologue", false, &bob_keypair).unwrap(); + + // pqXX pattern: 4 messages + // Message 1: -> e + let mut msg1 = vec![0u8; 4096]; + let len1 = alice.write_message(&[], &mut msg1).unwrap(); + msg1.truncate(len1); + + let mut payload1 = vec![0u8; 4096]; + let _plen1 = bob.read_message(&msg1, &mut payload1).unwrap(); + + // Message 2: <- ekem, e, es + let mut msg2 = vec![0u8; 4096]; + let len2 = bob.write_message(&[], &mut msg2).unwrap(); + msg2.truncate(len2); + + let mut payload2 = vec![0u8; 4096]; + let _plen2 = alice.read_message(&msg2, &mut payload2).unwrap(); + + // Message 3: -> skem, s, se (with payload) + let mut msg3 = vec![0u8; 8192]; + let test_payload = b"hello from alice"; + let len3 = alice.write_message(test_payload, &mut msg3).unwrap(); + msg3.truncate(len3); + + let mut payload3 = vec![0u8; 4096]; + let plen3 = bob.read_message(&msg3, &mut payload3).unwrap(); + payload3.truncate(plen3); + assert_eq!(&payload3, test_payload); + + // Message 4: <- sks (final KEM, empty payload) + let mut msg4 = vec![0u8; 4096]; + let len4 = bob.write_message(&[], &mut msg4).unwrap(); + msg4.truncate(len4); + + let mut payload4 = vec![0u8; 4096]; + let plen4 = alice.read_message(&msg4, &mut payload4).unwrap(); + assert_eq!(plen4, 0); // Empty payload + + // Both should be finished + assert!(alice.is_finished()); + assert!(bob.is_finished()); + + // Convert to transport mode + let mut alice_transport = alice.into_transport_mode().unwrap(); + let mut bob_transport = bob.into_transport_mode().unwrap(); + + // Test transport + let plaintext = b"post-quantum secure message"; + let mut ciphertext = vec![0u8; plaintext.len() + 16]; // +16 for auth tag + let clen = alice_transport.write_message(plaintext, &mut ciphertext).unwrap(); + ciphertext.truncate(clen); + + let mut decrypted = vec![0u8; plaintext.len()]; + let dlen = bob_transport.read_message(&ciphertext, &mut decrypted).unwrap(); + decrypted.truncate(dlen); + + assert_eq!(&decrypted, plaintext); + } } diff --git a/client/litep2p/src/crypto/tls/certificate.rs b/client/litep2p/src/crypto/tls/certificate.rs index f013af20..48b8e52f 100644 --- a/client/litep2p/src/crypto/tls/certificate.rs +++ b/client/litep2p/src/crypto/tls/certificate.rs @@ -23,8 +23,8 @@ //! This module handles generation, signing, and verification of certificates. use crate::{ - crypto::{dilithium::Keypair, PublicKey, RemotePublicKey}, - PeerId, + crypto::{dilithium::Keypair, PublicKey, RemotePublicKey}, + PeerId, }; use rustls::pki_types::{CertificateDer, PrivatePkcs8KeyDer}; @@ -49,29 +49,28 @@ static P2P_SIGNATURE_ALGORITHM: &rcgen::SignatureAlgorithm = &rcgen::PKCS_ECDSA_ /// Generates a self-signed TLS certificate that includes a libp2p-specific /// certificate extension containing the public key of the given keypair. pub fn generate( - identity_keypair: &Keypair, + identity_keypair: &Keypair, ) -> Result<(CertificateDer<'static>, PrivatePkcs8KeyDer<'static>), GenError> { - // Keypair used to sign the certificate. - // SHOULD NOT be related to the host's key. - // Endpoints MAY generate a new key and certificate - // for every connection attempt, or they MAY reuse the same key - // and certificate for multiple connections. - let certificate_keypair = rcgen::KeyPair::generate_for(P2P_SIGNATURE_ALGORITHM)?; - let rustls_key = PrivatePkcs8KeyDer::from(certificate_keypair.serialize_der()); - - let certificate = { - let mut params = rcgen::CertificateParams::new(vec![])?; - params.distinguished_name = rcgen::DistinguishedName::new(); - params.custom_extensions.push(make_libp2p_extension( - identity_keypair, - &certificate_keypair, - )?); - params.self_signed(&certificate_keypair)? - }; - - let rustls_certificate = CertificateDer::from(certificate.der().to_vec()); - - Ok((rustls_certificate, rustls_key)) + // Keypair used to sign the certificate. + // SHOULD NOT be related to the host's key. + // Endpoints MAY generate a new key and certificate + // for every connection attempt, or they MAY reuse the same key + // and certificate for multiple connections. + let certificate_keypair = rcgen::KeyPair::generate_for(P2P_SIGNATURE_ALGORITHM)?; + let rustls_key = PrivatePkcs8KeyDer::from(certificate_keypair.serialize_der()); + + let certificate = { + let mut params = rcgen::CertificateParams::new(vec![])?; + params.distinguished_name = rcgen::DistinguishedName::new(); + params + .custom_extensions + .push(make_libp2p_extension(identity_keypair, &certificate_keypair)?); + params.self_signed(&certificate_keypair)? + }; + + let rustls_certificate = CertificateDer::from(certificate.der().to_vec()); + + Ok((rustls_certificate, rustls_key)) } /// Attempts to parse the provided bytes as a [`P2pCertificate`]. @@ -79,33 +78,33 @@ pub fn generate( /// For this to succeed, the certificate must contain the specified extension and the signature must /// match the embedded public key. pub fn parse<'a>(certificate: &'a CertificateDer<'a>) -> Result, ParseError> { - let certificate = parse_unverified(certificate.as_ref())?; + let certificate = parse_unverified(certificate.as_ref())?; - certificate.verify()?; + certificate.verify()?; - Ok(certificate) + Ok(certificate) } /// An X.509 certificate with a libp2p-specific extension /// is used to secure libp2p connections. pub struct P2pCertificate<'a> { - certificate: X509Certificate<'a>, - /// This is a specific libp2p Public Key Extension with two values: - /// * the public host key - /// * a signature performed using the private host key - extension: P2pExtension, + certificate: X509Certificate<'a>, + /// This is a specific libp2p Public Key Extension with two values: + /// * the public host key + /// * a signature performed using the private host key + extension: P2pExtension, } /// The contents of the specific libp2p extension, containing the public host key /// and a signature performed using the private host key. pub struct P2pExtension { - public_key: RemotePublicKey, - /// This signature provides cryptographic proof that the peer was - /// in possession of the private host key at the time the certificate was signed. - signature: Vec, - /// PeerId derived from the public key. While not being part of the extension, we store it to - /// avoid the need to serialize the public key back to protobuf. - peer_id: PeerId, + public_key: RemotePublicKey, + /// This signature provides cryptographic proof that the peer was + /// in possession of the private host key at the time the certificate was signed. + signature: Vec, + /// PeerId derived from the public key. While not being part of the extension, we store it to + /// avoid the need to serialize the public key back to protobuf. + peer_id: PeerId, } #[derive(Debug, thiserror::Error)] @@ -116,379 +115,368 @@ pub struct GenError(#[from] rcgen::Error); pub struct ParseError(pub(crate) webpki::Error); impl std::fmt::Display for ParseError { - fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result { - write!(f, "certificate parse error: {:?}", self.0) - } + fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result { + write!(f, "certificate parse error: {:?}", self.0) + } } impl std::error::Error for ParseError {} impl From for ParseError { - fn from(e: webpki::Error) -> Self { - ParseError(e) - } + fn from(e: webpki::Error) -> Self { + ParseError(e) + } } #[derive(Debug)] pub struct VerificationError(pub(crate) webpki::Error); impl std::fmt::Display for VerificationError { - fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result { - write!(f, "certificate verification error: {:?}", self.0) - } + fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result { + write!(f, "certificate verification error: {:?}", self.0) + } } impl std::error::Error for VerificationError {} impl From for VerificationError { - fn from(e: webpki::Error) -> Self { - VerificationError(e) - } + fn from(e: webpki::Error) -> Self { + VerificationError(e) + } } /// Internal function that only parses but does not verify the certificate. /// /// Useful for testing but unsuitable for production. fn parse_unverified<'a>(der_input: &'a [u8]) -> Result, webpki::Error> { - let x509 = X509Certificate::from_der(der_input) - .map(|(_rest_input, x509)| x509) - .map_err(|_| webpki::Error::BadDer)?; - - let p2p_ext_oid = der_parser::oid::Oid::from(&P2P_EXT_OID) - .expect("This is a valid OID of p2p extension; qed"); - - let mut libp2p_extension = None; - - for ext in x509.extensions() { - let oid = &ext.oid; - if oid == &p2p_ext_oid && libp2p_extension.is_some() { - // The extension was already parsed - return Err(webpki::Error::BadDer); - } - - if oid == &p2p_ext_oid { - // The public host key and the signature are ANS.1-encoded - // into the SignedKey data structure, which is carried - // in the libp2p Public Key Extension. - // SignedKey ::= SEQUENCE { - // publicKey OCTET STRING, - // signature OCTET STRING - // } - let (public_key_protobuf, signature): (Vec, Vec) = - yasna::decode_der(ext.value).map_err(|_| webpki::Error::ExtensionValueInvalid)?; - // The publicKey field of SignedKey contains the public host key - // of the endpoint, encoded using the following protobuf: - // enum KeyType { - // RSA = 0; - // Ed25519 = 1; - // Secp256k1 = 2; - // ECDSA = 3; - // } - // message PublicKey { - // required KeyType Type = 1; - // required bytes Data = 2; - // } - let public_key = RemotePublicKey::from_protobuf_encoding(&public_key_protobuf) - .map_err(|_| webpki::Error::UnknownIssuer)?; - let peer_id = PeerId::from_public_key_protobuf(&public_key_protobuf); - let ext = P2pExtension { - public_key, - signature, - peer_id, - }; - libp2p_extension = Some(ext); - continue; - } - - if ext.critical { - // Endpoints MUST abort the connection attempt if the certificate - // contains critical extensions that the endpoint does not understand. - return Err(webpki::Error::UnsupportedCriticalExtension); - } - - // Implementations MUST ignore non-critical extensions with unknown OIDs. - } - - // The certificate MUST contain the libp2p Public Key Extension. - // If this extension is missing, endpoints MUST abort the connection attempt. - let extension = libp2p_extension.ok_or(webpki::Error::BadDer)?; - - let certificate = P2pCertificate { - certificate: x509, - extension, - }; - - Ok(certificate) + let x509 = X509Certificate::from_der(der_input) + .map(|(_rest_input, x509)| x509) + .map_err(|_| webpki::Error::BadDer)?; + + let p2p_ext_oid = der_parser::oid::Oid::from(&P2P_EXT_OID) + .expect("This is a valid OID of p2p extension; qed"); + + let mut libp2p_extension = None; + + for ext in x509.extensions() { + let oid = &ext.oid; + if oid == &p2p_ext_oid && libp2p_extension.is_some() { + // The extension was already parsed + return Err(webpki::Error::BadDer); + } + + if oid == &p2p_ext_oid { + // The public host key and the signature are ANS.1-encoded + // into the SignedKey data structure, which is carried + // in the libp2p Public Key Extension. + // SignedKey ::= SEQUENCE { + // publicKey OCTET STRING, + // signature OCTET STRING + // } + let (public_key_protobuf, signature): (Vec, Vec) = + yasna::decode_der(ext.value).map_err(|_| webpki::Error::ExtensionValueInvalid)?; + // The publicKey field of SignedKey contains the public host key + // of the endpoint, encoded using the following protobuf: + // enum KeyType { + // RSA = 0; + // Ed25519 = 1; + // Secp256k1 = 2; + // ECDSA = 3; + // } + // message PublicKey { + // required KeyType Type = 1; + // required bytes Data = 2; + // } + let public_key = RemotePublicKey::from_protobuf_encoding(&public_key_protobuf) + .map_err(|_| webpki::Error::UnknownIssuer)?; + let peer_id = PeerId::from_public_key_protobuf(&public_key_protobuf); + let ext = P2pExtension { public_key, signature, peer_id }; + libp2p_extension = Some(ext); + continue; + } + + if ext.critical { + // Endpoints MUST abort the connection attempt if the certificate + // contains critical extensions that the endpoint does not understand. + return Err(webpki::Error::UnsupportedCriticalExtension); + } + + // Implementations MUST ignore non-critical extensions with unknown OIDs. + } + + // The certificate MUST contain the libp2p Public Key Extension. + // If this extension is missing, endpoints MUST abort the connection attempt. + let extension = libp2p_extension.ok_or(webpki::Error::BadDer)?; + + let certificate = P2pCertificate { certificate: x509, extension }; + + Ok(certificate) } fn make_libp2p_extension( - identity_keypair: &Keypair, - certificate_pubkey: &impl rcgen::PublicKeyData, + identity_keypair: &Keypair, + certificate_pubkey: &impl rcgen::PublicKeyData, ) -> Result { - // The peer signs the concatenation of the string `libp2p-tls-handshake:` - // and the public key (in SPKI DER format) that it used to generate the certificate carrying - // the libp2p Public Key Extension, using its private host key. - let signature = { - let mut msg = vec![]; - msg.extend(P2P_SIGNING_PREFIX); - msg.extend(certificate_pubkey.subject_public_key_info()); - - identity_keypair.sign(&msg) - }; - - // The public host key and the signature are ANS.1-encoded - // into the SignedKey data structure, which is carried - // in the libp2p Public Key Extension. - // SignedKey ::= SEQUENCE { - // publicKey OCTET STRING, - // signature OCTET STRING - // } - let extension_content = { - let serialized_pubkey = - PublicKey::from(identity_keypair.public()).to_protobuf_encoding(); - yasna::encode_der(&(serialized_pubkey, signature)) - }; - - // This extension MAY be marked critical according to libp2p spec. - // However, we set it as non-critical to avoid issues with rustls 0.23+ - // which rejects unknown critical extensions during certificate loading. - // Our custom verifier still validates the extension properly. - let mut ext = rcgen::CustomExtension::from_oid_content(&P2P_EXT_OID, extension_content); - ext.set_criticality(false); - - Ok(ext) + // The peer signs the concatenation of the string `libp2p-tls-handshake:` + // and the public key (in SPKI DER format) that it used to generate the certificate carrying + // the libp2p Public Key Extension, using its private host key. + let signature = { + let mut msg = vec![]; + msg.extend(P2P_SIGNING_PREFIX); + msg.extend(certificate_pubkey.subject_public_key_info()); + + identity_keypair.sign(&msg) + }; + + // The public host key and the signature are ANS.1-encoded + // into the SignedKey data structure, which is carried + // in the libp2p Public Key Extension. + // SignedKey ::= SEQUENCE { + // publicKey OCTET STRING, + // signature OCTET STRING + // } + let extension_content = { + let serialized_pubkey = PublicKey::from(identity_keypair.public()).to_protobuf_encoding(); + yasna::encode_der(&(serialized_pubkey, signature)) + }; + + // This extension MAY be marked critical according to libp2p spec. + // However, we set it as non-critical to avoid issues with rustls 0.23+ + // which rejects unknown critical extensions during certificate loading. + // Our custom verifier still validates the extension properly. + let mut ext = rcgen::CustomExtension::from_oid_content(&P2P_EXT_OID, extension_content); + ext.set_criticality(false); + + Ok(ext) } impl P2pCertificate<'_> { - /// The [`PeerId`] of the remote peer. - pub fn peer_id(&self) -> PeerId { - self.extension.peer_id - } - - /// Verify the `signature` of the `message` signed by the private key corresponding to the - /// public key stored in the certificate. - pub fn verify_signature( - &self, - signature_scheme: rustls::SignatureScheme, - message: &[u8], - signature: &[u8], - ) -> Result<(), VerificationError> { - let pk = self.public_key(signature_scheme)?; - pk.verify(message, signature) - .map_err(|_| webpki::Error::InvalidSignatureForPublicKey)?; - - Ok(()) - } - - /// Get a [`ring::signature::UnparsedPublicKey`] for this `signature_scheme`. - /// Return `Error` if the `signature_scheme` does not match the public key signature - /// and hashing algorithm or if the `signature_scheme` is not supported. - fn public_key( - &self, - signature_scheme: rustls::SignatureScheme, - ) -> Result, webpki::Error> { - use ring::signature; - use rustls::SignatureScheme::*; - - let current_signature_scheme = self.signature_scheme()?; - if signature_scheme != current_signature_scheme { - // This certificate was signed with a different signature scheme - return Err(webpki::Error::UnsupportedSignatureAlgorithmForPublicKey); - } - - let verification_algorithm: &dyn signature::VerificationAlgorithm = match signature_scheme { - RSA_PKCS1_SHA256 => &signature::RSA_PKCS1_2048_8192_SHA256, - RSA_PKCS1_SHA384 => &signature::RSA_PKCS1_2048_8192_SHA384, - RSA_PKCS1_SHA512 => &signature::RSA_PKCS1_2048_8192_SHA512, - ECDSA_NISTP256_SHA256 => &signature::ECDSA_P256_SHA256_ASN1, - ECDSA_NISTP384_SHA384 => &signature::ECDSA_P384_SHA384_ASN1, - ECDSA_NISTP521_SHA512 => { - // See https://github.com/briansmith/ring/issues/824 - return Err(webpki::Error::UnsupportedSignatureAlgorithm); - } - RSA_PSS_SHA256 => &signature::RSA_PSS_2048_8192_SHA256, - RSA_PSS_SHA384 => &signature::RSA_PSS_2048_8192_SHA384, - RSA_PSS_SHA512 => &signature::RSA_PSS_2048_8192_SHA512, - ED25519 => &signature::ED25519, - ED448 => { - // See https://github.com/briansmith/ring/issues/463 - return Err(webpki::Error::UnsupportedSignatureAlgorithm); - } - // Similarly, hash functions with an output length less than 256 bits - // MUST NOT be used, due to the possibility of collision attacks. - // In particular, MD5 and SHA1 MUST NOT be used. - RSA_PKCS1_SHA1 => return Err(webpki::Error::UnsupportedSignatureAlgorithm), - ECDSA_SHA1_Legacy => return Err(webpki::Error::UnsupportedSignatureAlgorithm), - _ => return Err(webpki::Error::UnsupportedSignatureAlgorithm), - }; - let spki = &self.certificate.tbs_certificate.subject_pki; - let key = signature::UnparsedPublicKey::new( - verification_algorithm, - spki.subject_public_key.as_ref(), - ); - - Ok(key) - } - - /// This method validates the certificate according to libp2p TLS 1.3 specs. - /// The certificate MUST: - /// 1. be valid at the time it is received by the peer; - /// 2. use the NamedCurve encoding; - /// 3. use hash functions with an output length not less than 256 bits; - /// 4. be self signed; - /// 5. contain a valid signature in the specific libp2p extension. - fn verify(&self) -> Result<(), webpki::Error> { - use webpki::Error; - // The certificate MUST have NotBefore and NotAfter fields set - // such that the certificate is valid at the time it is received by the peer. - if !self.certificate.validity().is_valid() { - return Err(Error::InvalidCertValidity); - } - - // Certificates MUST use the NamedCurve encoding for elliptic curve parameters. - // Similarly, hash functions with an output length less than 256 bits - // MUST NOT be used, due to the possibility of collision attacks. - // In particular, MD5 and SHA1 MUST NOT be used. - // Endpoints MUST abort the connection attempt if it is not used. - let signature_scheme = self.signature_scheme()?; - // Endpoints MUST abort the connection attempt if the certificate's - // self-signature is not valid. - let raw_certificate = self.certificate.tbs_certificate.as_ref(); - let signature = self.certificate.signature_value.as_ref(); - // check if self signed - self.verify_signature(signature_scheme, raw_certificate, signature) - .map_err(|_| Error::SignatureAlgorithmMismatch)?; - - let subject_pki = self.certificate.public_key().raw; - - // The peer signs the concatenation of the string `libp2p-tls-handshake:` - // and the public key that it used to generate the certificate carrying - // the libp2p Public Key Extension, using its private host key. - let mut msg = vec![]; - msg.extend(P2P_SIGNING_PREFIX); - msg.extend(subject_pki); - - // This signature provides cryptographic proof that the peer was in possession - // of the private host key at the time the certificate was signed. - // Peers MUST verify the signature, and abort the connection attempt - // if signature verification fails. - let user_owns_sk = self.extension.public_key.verify(&msg, &self.extension.signature); - if !user_owns_sk { - return Err(Error::UnknownIssuer); - } - - Ok(()) - } - - /// Return the signature scheme corresponding to [`AlgorithmIdentifier`]s - /// of `subject_pki` and `signature_algorithm` - /// according to . - fn signature_scheme(&self) -> Result { - // Certificates MUST use the NamedCurve encoding for elliptic curve parameters. - // Endpoints MUST abort the connection attempt if it is not used. - use oid_registry::*; - use rustls::SignatureScheme::*; - - let signature_algorithm = &self.certificate.signature_algorithm; - let pki_algorithm = &self.certificate.tbs_certificate.subject_pki.algorithm; - - if pki_algorithm.algorithm == OID_PKCS1_RSAENCRYPTION { - if signature_algorithm.algorithm == OID_PKCS1_SHA256WITHRSA { - return Ok(RSA_PKCS1_SHA256); - } - if signature_algorithm.algorithm == OID_PKCS1_SHA384WITHRSA { - return Ok(RSA_PKCS1_SHA384); - } - if signature_algorithm.algorithm == OID_PKCS1_SHA512WITHRSA { - return Ok(RSA_PKCS1_SHA512); - } - if signature_algorithm.algorithm == OID_PKCS1_RSASSAPSS { - // According to https://datatracker.ietf.org/doc/html/rfc4055#section-3.1: - // Inside of params there shuld be a sequence of: - // - Hash Algorithm - // - Mask Algorithm - // - Salt Length - // - Trailer Field - - // We are interested in Hash Algorithm only - - if let Ok(SignatureAlgorithm::RSASSA_PSS(params)) = - SignatureAlgorithm::try_from(signature_algorithm) - { - let hash_oid = params.hash_algorithm_oid(); - if hash_oid == &OID_NIST_HASH_SHA256 { - return Ok(RSA_PSS_SHA256); - } - if hash_oid == &OID_NIST_HASH_SHA384 { - return Ok(RSA_PSS_SHA384); - } - if hash_oid == &OID_NIST_HASH_SHA512 { - return Ok(RSA_PSS_SHA512); - } - } - - // Default hash algo is SHA-1, however: - // In particular, MD5 and SHA1 MUST NOT be used. - return Err(webpki::Error::UnsupportedSignatureAlgorithm); - } - } - - if pki_algorithm.algorithm == OID_KEY_TYPE_EC_PUBLIC_KEY { - let signature_param = pki_algorithm - .parameters - .as_ref() - .ok_or(webpki::Error::BadDer)? - .as_oid() - .map_err(|_| webpki::Error::BadDer)?; - if signature_param == OID_EC_P256 - && signature_algorithm.algorithm == OID_SIG_ECDSA_WITH_SHA256 - { - return Ok(ECDSA_NISTP256_SHA256); - } - if signature_param == OID_NIST_EC_P384 - && signature_algorithm.algorithm == OID_SIG_ECDSA_WITH_SHA384 - { - return Ok(ECDSA_NISTP384_SHA384); - } - if signature_param == OID_NIST_EC_P521 - && signature_algorithm.algorithm == OID_SIG_ECDSA_WITH_SHA512 - { - return Ok(ECDSA_NISTP521_SHA512); - } - return Err(webpki::Error::UnsupportedSignatureAlgorithm); - } - - if signature_algorithm.algorithm == OID_SIG_ED25519 { - return Ok(ED25519); - } - if signature_algorithm.algorithm == OID_SIG_ED448 { - return Ok(ED448); - } - - Err(webpki::Error::UnsupportedSignatureAlgorithm) - } + /// The [`PeerId`] of the remote peer. + pub fn peer_id(&self) -> PeerId { + self.extension.peer_id + } + + /// Verify the `signature` of the `message` signed by the private key corresponding to the + /// public key stored in the certificate. + pub fn verify_signature( + &self, + signature_scheme: rustls::SignatureScheme, + message: &[u8], + signature: &[u8], + ) -> Result<(), VerificationError> { + let pk = self.public_key(signature_scheme)?; + pk.verify(message, signature) + .map_err(|_| webpki::Error::InvalidSignatureForPublicKey)?; + + Ok(()) + } + + /// Get a [`ring::signature::UnparsedPublicKey`] for this `signature_scheme`. + /// Return `Error` if the `signature_scheme` does not match the public key signature + /// and hashing algorithm or if the `signature_scheme` is not supported. + fn public_key( + &self, + signature_scheme: rustls::SignatureScheme, + ) -> Result, webpki::Error> { + use ring::signature; + use rustls::SignatureScheme::*; + + let current_signature_scheme = self.signature_scheme()?; + if signature_scheme != current_signature_scheme { + // This certificate was signed with a different signature scheme + return Err(webpki::Error::UnsupportedSignatureAlgorithmForPublicKey); + } + + let verification_algorithm: &dyn signature::VerificationAlgorithm = match signature_scheme { + RSA_PKCS1_SHA256 => &signature::RSA_PKCS1_2048_8192_SHA256, + RSA_PKCS1_SHA384 => &signature::RSA_PKCS1_2048_8192_SHA384, + RSA_PKCS1_SHA512 => &signature::RSA_PKCS1_2048_8192_SHA512, + ECDSA_NISTP256_SHA256 => &signature::ECDSA_P256_SHA256_ASN1, + ECDSA_NISTP384_SHA384 => &signature::ECDSA_P384_SHA384_ASN1, + ECDSA_NISTP521_SHA512 => { + // See https://github.com/briansmith/ring/issues/824 + return Err(webpki::Error::UnsupportedSignatureAlgorithm); + }, + RSA_PSS_SHA256 => &signature::RSA_PSS_2048_8192_SHA256, + RSA_PSS_SHA384 => &signature::RSA_PSS_2048_8192_SHA384, + RSA_PSS_SHA512 => &signature::RSA_PSS_2048_8192_SHA512, + ED25519 => &signature::ED25519, + ED448 => { + // See https://github.com/briansmith/ring/issues/463 + return Err(webpki::Error::UnsupportedSignatureAlgorithm); + }, + // Similarly, hash functions with an output length less than 256 bits + // MUST NOT be used, due to the possibility of collision attacks. + // In particular, MD5 and SHA1 MUST NOT be used. + RSA_PKCS1_SHA1 => return Err(webpki::Error::UnsupportedSignatureAlgorithm), + ECDSA_SHA1_Legacy => return Err(webpki::Error::UnsupportedSignatureAlgorithm), + _ => return Err(webpki::Error::UnsupportedSignatureAlgorithm), + }; + let spki = &self.certificate.tbs_certificate.subject_pki; + let key = signature::UnparsedPublicKey::new( + verification_algorithm, + spki.subject_public_key.as_ref(), + ); + + Ok(key) + } + + /// This method validates the certificate according to libp2p TLS 1.3 specs. + /// The certificate MUST: + /// 1. be valid at the time it is received by the peer; + /// 2. use the NamedCurve encoding; + /// 3. use hash functions with an output length not less than 256 bits; + /// 4. be self signed; + /// 5. contain a valid signature in the specific libp2p extension. + fn verify(&self) -> Result<(), webpki::Error> { + use webpki::Error; + // The certificate MUST have NotBefore and NotAfter fields set + // such that the certificate is valid at the time it is received by the peer. + if !self.certificate.validity().is_valid() { + return Err(Error::InvalidCertValidity); + } + + // Certificates MUST use the NamedCurve encoding for elliptic curve parameters. + // Similarly, hash functions with an output length less than 256 bits + // MUST NOT be used, due to the possibility of collision attacks. + // In particular, MD5 and SHA1 MUST NOT be used. + // Endpoints MUST abort the connection attempt if it is not used. + let signature_scheme = self.signature_scheme()?; + // Endpoints MUST abort the connection attempt if the certificate's + // self-signature is not valid. + let raw_certificate = self.certificate.tbs_certificate.as_ref(); + let signature = self.certificate.signature_value.as_ref(); + // check if self signed + self.verify_signature(signature_scheme, raw_certificate, signature) + .map_err(|_| Error::SignatureAlgorithmMismatch)?; + + let subject_pki = self.certificate.public_key().raw; + + // The peer signs the concatenation of the string `libp2p-tls-handshake:` + // and the public key that it used to generate the certificate carrying + // the libp2p Public Key Extension, using its private host key. + let mut msg = vec![]; + msg.extend(P2P_SIGNING_PREFIX); + msg.extend(subject_pki); + + // This signature provides cryptographic proof that the peer was in possession + // of the private host key at the time the certificate was signed. + // Peers MUST verify the signature, and abort the connection attempt + // if signature verification fails. + let user_owns_sk = self.extension.public_key.verify(&msg, &self.extension.signature); + if !user_owns_sk { + return Err(Error::UnknownIssuer); + } + + Ok(()) + } + + /// Return the signature scheme corresponding to [`AlgorithmIdentifier`]s + /// of `subject_pki` and `signature_algorithm` + /// according to . + fn signature_scheme(&self) -> Result { + // Certificates MUST use the NamedCurve encoding for elliptic curve parameters. + // Endpoints MUST abort the connection attempt if it is not used. + use oid_registry::*; + use rustls::SignatureScheme::*; + + let signature_algorithm = &self.certificate.signature_algorithm; + let pki_algorithm = &self.certificate.tbs_certificate.subject_pki.algorithm; + + if pki_algorithm.algorithm == OID_PKCS1_RSAENCRYPTION { + if signature_algorithm.algorithm == OID_PKCS1_SHA256WITHRSA { + return Ok(RSA_PKCS1_SHA256); + } + if signature_algorithm.algorithm == OID_PKCS1_SHA384WITHRSA { + return Ok(RSA_PKCS1_SHA384); + } + if signature_algorithm.algorithm == OID_PKCS1_SHA512WITHRSA { + return Ok(RSA_PKCS1_SHA512); + } + if signature_algorithm.algorithm == OID_PKCS1_RSASSAPSS { + // According to https://datatracker.ietf.org/doc/html/rfc4055#section-3.1: + // Inside of params there shuld be a sequence of: + // - Hash Algorithm + // - Mask Algorithm + // - Salt Length + // - Trailer Field + + // We are interested in Hash Algorithm only + + if let Ok(SignatureAlgorithm::RSASSA_PSS(params)) = + SignatureAlgorithm::try_from(signature_algorithm) + { + let hash_oid = params.hash_algorithm_oid(); + if hash_oid == &OID_NIST_HASH_SHA256 { + return Ok(RSA_PSS_SHA256); + } + if hash_oid == &OID_NIST_HASH_SHA384 { + return Ok(RSA_PSS_SHA384); + } + if hash_oid == &OID_NIST_HASH_SHA512 { + return Ok(RSA_PSS_SHA512); + } + } + + // Default hash algo is SHA-1, however: + // In particular, MD5 and SHA1 MUST NOT be used. + return Err(webpki::Error::UnsupportedSignatureAlgorithm); + } + } + + if pki_algorithm.algorithm == OID_KEY_TYPE_EC_PUBLIC_KEY { + let signature_param = pki_algorithm + .parameters + .as_ref() + .ok_or(webpki::Error::BadDer)? + .as_oid() + .map_err(|_| webpki::Error::BadDer)?; + if signature_param == OID_EC_P256 && + signature_algorithm.algorithm == OID_SIG_ECDSA_WITH_SHA256 + { + return Ok(ECDSA_NISTP256_SHA256); + } + if signature_param == OID_NIST_EC_P384 && + signature_algorithm.algorithm == OID_SIG_ECDSA_WITH_SHA384 + { + return Ok(ECDSA_NISTP384_SHA384); + } + if signature_param == OID_NIST_EC_P521 && + signature_algorithm.algorithm == OID_SIG_ECDSA_WITH_SHA512 + { + return Ok(ECDSA_NISTP521_SHA512); + } + return Err(webpki::Error::UnsupportedSignatureAlgorithm); + } + + if signature_algorithm.algorithm == OID_SIG_ED25519 { + return Ok(ED25519); + } + if signature_algorithm.algorithm == OID_SIG_ED448 { + return Ok(ED448); + } + + Err(webpki::Error::UnsupportedSignatureAlgorithm) + } } #[cfg(test)] mod tests { - use super::*; - - #[test] - fn sanity_check() { - let keypair = crate::crypto::dilithium::Keypair::generate(); - - let (cert, _) = generate(&keypair).unwrap(); - let parsed_cert = parse(&cert).unwrap(); - - assert!(parsed_cert.verify().is_ok()); - assert_eq!( - PublicKey::from(keypair.public()), - parsed_cert.extension.public_key - ); - } - - // Note: The certificate signature scheme tests for classical crypto (Ed25519, RSA, ECDSA) - // have been removed because the test certificates contain Ed25519 identity keys in their - // p2p extensions, but we now only support Dilithium for identity. - // The `sanity_check` test above verifies that Dilithium certificates work correctly. + use super::*; + + #[test] + fn sanity_check() { + let keypair = crate::crypto::dilithium::Keypair::generate(); + + let (cert, _) = generate(&keypair).unwrap(); + let parsed_cert = parse(&cert).unwrap(); + + assert!(parsed_cert.verify().is_ok()); + assert_eq!(PublicKey::from(keypair.public()), parsed_cert.extension.public_key); + } + + // Note: The certificate signature scheme tests for classical crypto (Ed25519, RSA, ECDSA) + // have been removed because the test certificates contain Ed25519 identity keys in their + // p2p extensions, but we now only support Dilithium for identity. + // The `sanity_check` test above verifies that Dilithium certificates work correctly. } diff --git a/client/litep2p/src/crypto/tls/mod.rs b/client/litep2p/src/crypto/tls/mod.rs index a520fa90..957db4c4 100644 --- a/client/litep2p/src/crypto/tls/mod.rs +++ b/client/litep2p/src/crypto/tls/mod.rs @@ -40,44 +40,44 @@ const P2P_ALPN: [u8; 6] = *b"libp2p"; /// Create a TLS server configuration for litep2p with post-quantum key exchange. pub fn make_server_config( - keypair: &Keypair, + keypair: &Keypair, ) -> Result { - let (certificate, private_key) = certificate::generate(keypair)?; + let (certificate, private_key) = certificate::generate(keypair)?; - // Use post-quantum provider with ML-KEM hybrid key exchange - let provider = rustls_post_quantum::provider(); + // Use post-quantum provider with ML-KEM hybrid key exchange + let provider = rustls_post_quantum::provider(); - let mut crypto = rustls::ServerConfig::builder_with_provider(Arc::new(provider)) - .with_protocol_versions(verifier::PROTOCOL_VERSIONS) - .expect("Protocol versions are valid; qed") - .with_client_cert_verifier(Arc::new(verifier::Libp2pCertificateVerifier::new())) - .with_single_cert(vec![certificate], PrivateKeyDer::Pkcs8(private_key)) - .expect("Server cert key DER is valid; qed"); - crypto.alpn_protocols = vec![P2P_ALPN.to_vec()]; + let mut crypto = rustls::ServerConfig::builder_with_provider(Arc::new(provider)) + .with_protocol_versions(verifier::PROTOCOL_VERSIONS) + .expect("Protocol versions are valid; qed") + .with_client_cert_verifier(Arc::new(verifier::Libp2pCertificateVerifier::new())) + .with_single_cert(vec![certificate], PrivateKeyDer::Pkcs8(private_key)) + .expect("Server cert key DER is valid; qed"); + crypto.alpn_protocols = vec![P2P_ALPN.to_vec()]; - Ok(crypto) + Ok(crypto) } /// Create a TLS client configuration for libp2p with post-quantum key exchange. pub fn make_client_config( - keypair: &Keypair, - remote_peer_id: Option, + keypair: &Keypair, + remote_peer_id: Option, ) -> Result { - let (certificate, private_key) = certificate::generate(keypair)?; + let (certificate, private_key) = certificate::generate(keypair)?; - // Use post-quantum provider with ML-KEM hybrid key exchange - let provider = rustls_post_quantum::provider(); + // Use post-quantum provider with ML-KEM hybrid key exchange + let provider = rustls_post_quantum::provider(); - let mut crypto = rustls::ClientConfig::builder_with_provider(Arc::new(provider)) - .with_protocol_versions(verifier::PROTOCOL_VERSIONS) - .expect("Protocol versions are valid; qed") - .dangerous() - .with_custom_certificate_verifier(Arc::new( - verifier::Libp2pCertificateVerifier::with_remote_peer_id(remote_peer_id), - )) - .with_client_auth_cert(vec![certificate], PrivateKeyDer::Pkcs8(private_key)) - .expect("Client cert key DER is valid; qed"); - crypto.alpn_protocols = vec![P2P_ALPN.to_vec()]; + let mut crypto = rustls::ClientConfig::builder_with_provider(Arc::new(provider)) + .with_protocol_versions(verifier::PROTOCOL_VERSIONS) + .expect("Protocol versions are valid; qed") + .dangerous() + .with_custom_certificate_verifier(Arc::new( + verifier::Libp2pCertificateVerifier::with_remote_peer_id(remote_peer_id), + )) + .with_client_auth_cert(vec![certificate], PrivateKeyDer::Pkcs8(private_key)) + .expect("Client cert key DER is valid; qed"); + crypto.alpn_protocols = vec![P2P_ALPN.to_vec()]; - Ok(crypto) + Ok(crypto) } diff --git a/client/litep2p/src/crypto/tls/verifier.rs b/client/litep2p/src/crypto/tls/verifier.rs index c506f06d..8db553ed 100644 --- a/client/litep2p/src/crypto/tls/verifier.rs +++ b/client/litep2p/src/crypto/tls/verifier.rs @@ -26,10 +26,10 @@ use crate::{crypto::tls::certificate, PeerId}; use rustls::{ - client::danger::{HandshakeSignatureValid, ServerCertVerified, ServerCertVerifier}, - server::danger::{ClientCertVerified, ClientCertVerifier}, - pki_types::{CertificateDer, ServerName, UnixTime}, - DigitallySignedStruct, DistinguishedName, SignatureScheme, + client::danger::{HandshakeSignatureValid, ServerCertVerified, ServerCertVerifier}, + pki_types::{CertificateDer, ServerName, UnixTime}, + server::danger::{ClientCertVerified, ClientCertVerifier}, + DigitallySignedStruct, DistinguishedName, SignatureScheme, }; /// The protocol versions supported by this verifier. @@ -45,8 +45,8 @@ pub static PROTOCOL_VERSIONS: &[&rustls::SupportedProtocolVersion] = &[&rustls:: /// Only TLS 1.3 is supported. TLS 1.2 should be disabled in the configuration of `rustls`. #[derive(Debug)] pub struct Libp2pCertificateVerifier { - /// The peer ID we intend to connect to - remote_peer_id: Option, + /// The peer ID we intend to connect to + remote_peer_id: Option, } /// libp2p requires the following of X.509 server certificate chains: @@ -56,86 +56,84 @@ pub struct Libp2pCertificateVerifier { /// - The certificate must have a valid libp2p extension that includes a signature of its public /// key. impl Libp2pCertificateVerifier { - pub fn new() -> Self { - Self { - remote_peer_id: None, - } - } - - pub fn with_remote_peer_id(remote_peer_id: Option) -> Self { - Self { remote_peer_id } - } - - /// Return the list of SignatureSchemes that this verifier will handle, - /// in `verify_tls12_signature` and `verify_tls13_signature` calls. - /// - /// This should be in priority order, with the most preferred first. - fn verification_schemes() -> Vec { - vec![ - // TODO SignatureScheme::ECDSA_NISTP521_SHA512 is not supported by `ring` yet - SignatureScheme::ECDSA_NISTP384_SHA384, - SignatureScheme::ECDSA_NISTP256_SHA256, - // TODO SignatureScheme::ED448 is not supported by `ring` yet - SignatureScheme::ED25519, - // In particular, RSA SHOULD NOT be used unless - // no elliptic curve algorithms are supported. - SignatureScheme::RSA_PSS_SHA512, - SignatureScheme::RSA_PSS_SHA384, - SignatureScheme::RSA_PSS_SHA256, - SignatureScheme::RSA_PKCS1_SHA512, - SignatureScheme::RSA_PKCS1_SHA384, - SignatureScheme::RSA_PKCS1_SHA256, - ] - } + pub fn new() -> Self { + Self { remote_peer_id: None } + } + + pub fn with_remote_peer_id(remote_peer_id: Option) -> Self { + Self { remote_peer_id } + } + + /// Return the list of SignatureSchemes that this verifier will handle, + /// in `verify_tls12_signature` and `verify_tls13_signature` calls. + /// + /// This should be in priority order, with the most preferred first. + fn verification_schemes() -> Vec { + vec![ + // TODO SignatureScheme::ECDSA_NISTP521_SHA512 is not supported by `ring` yet + SignatureScheme::ECDSA_NISTP384_SHA384, + SignatureScheme::ECDSA_NISTP256_SHA256, + // TODO SignatureScheme::ED448 is not supported by `ring` yet + SignatureScheme::ED25519, + // In particular, RSA SHOULD NOT be used unless + // no elliptic curve algorithms are supported. + SignatureScheme::RSA_PSS_SHA512, + SignatureScheme::RSA_PSS_SHA384, + SignatureScheme::RSA_PSS_SHA256, + SignatureScheme::RSA_PKCS1_SHA512, + SignatureScheme::RSA_PKCS1_SHA384, + SignatureScheme::RSA_PKCS1_SHA256, + ] + } } impl ServerCertVerifier for Libp2pCertificateVerifier { - fn verify_server_cert( - &self, - end_entity: &CertificateDer<'_>, - intermediates: &[CertificateDer<'_>], - _server_name: &ServerName<'_>, - _ocsp_response: &[u8], - _now: UnixTime, - ) -> Result { - let peer_id = verify_presented_certs(end_entity, intermediates)?; - - if let Some(remote_peer_id) = self.remote_peer_id { - // The public host key allows the peer to calculate the peer ID of the peer - // it is connecting to. Clients MUST verify that the peer ID derived from - // the certificate matches the peer ID they intended to connect to, - // and MUST abort the connection if there is a mismatch. - if remote_peer_id != peer_id { - return Err(rustls::Error::PeerMisbehaved( - rustls::PeerMisbehaved::SignedKxWithWrongAlgorithm, - )); - } - } - - Ok(ServerCertVerified::assertion()) - } - - fn verify_tls12_signature( - &self, - _message: &[u8], - _cert: &CertificateDer<'_>, - _dss: &DigitallySignedStruct, - ) -> Result { - unreachable!("`PROTOCOL_VERSIONS` only allows TLS 1.3") - } - - fn verify_tls13_signature( - &self, - message: &[u8], - cert: &CertificateDer<'_>, - dss: &DigitallySignedStruct, - ) -> Result { - verify_tls13_signature(cert, dss.scheme, message, dss.signature()) - } - - fn supported_verify_schemes(&self) -> Vec { - Self::verification_schemes() - } + fn verify_server_cert( + &self, + end_entity: &CertificateDer<'_>, + intermediates: &[CertificateDer<'_>], + _server_name: &ServerName<'_>, + _ocsp_response: &[u8], + _now: UnixTime, + ) -> Result { + let peer_id = verify_presented_certs(end_entity, intermediates)?; + + if let Some(remote_peer_id) = self.remote_peer_id { + // The public host key allows the peer to calculate the peer ID of the peer + // it is connecting to. Clients MUST verify that the peer ID derived from + // the certificate matches the peer ID they intended to connect to, + // and MUST abort the connection if there is a mismatch. + if remote_peer_id != peer_id { + return Err(rustls::Error::PeerMisbehaved( + rustls::PeerMisbehaved::SignedKxWithWrongAlgorithm, + )); + } + } + + Ok(ServerCertVerified::assertion()) + } + + fn verify_tls12_signature( + &self, + _message: &[u8], + _cert: &CertificateDer<'_>, + _dss: &DigitallySignedStruct, + ) -> Result { + unreachable!("`PROTOCOL_VERSIONS` only allows TLS 1.3") + } + + fn verify_tls13_signature( + &self, + message: &[u8], + cert: &CertificateDer<'_>, + dss: &DigitallySignedStruct, + ) -> Result { + verify_tls13_signature(cert, dss.scheme, message, dss.signature()) + } + + fn supported_verify_schemes(&self) -> Vec { + Self::verification_schemes() + } } /// libp2p requires the following of X.509 client certificate chains: @@ -146,46 +144,46 @@ impl ServerCertVerifier for Libp2pCertificateVerifier { /// - The certificate must have a valid libp2p extension that includes a signature of its public /// key. impl ClientCertVerifier for Libp2pCertificateVerifier { - fn offer_client_auth(&self) -> bool { - true - } - - fn root_hint_subjects(&self) -> &[DistinguishedName] { - &[] - } - - fn verify_client_cert( - &self, - end_entity: &CertificateDer<'_>, - intermediates: &[CertificateDer<'_>], - _now: UnixTime, - ) -> Result { - let _: PeerId = verify_presented_certs(end_entity, intermediates)?; - - Ok(ClientCertVerified::assertion()) - } - - fn verify_tls12_signature( - &self, - _message: &[u8], - _cert: &CertificateDer<'_>, - _dss: &DigitallySignedStruct, - ) -> Result { - unreachable!("`PROTOCOL_VERSIONS` only allows TLS 1.3") - } - - fn verify_tls13_signature( - &self, - message: &[u8], - cert: &CertificateDer<'_>, - dss: &DigitallySignedStruct, - ) -> Result { - verify_tls13_signature(cert, dss.scheme, message, dss.signature()) - } - - fn supported_verify_schemes(&self) -> Vec { - Self::verification_schemes() - } + fn offer_client_auth(&self) -> bool { + true + } + + fn root_hint_subjects(&self) -> &[DistinguishedName] { + &[] + } + + fn verify_client_cert( + &self, + end_entity: &CertificateDer<'_>, + intermediates: &[CertificateDer<'_>], + _now: UnixTime, + ) -> Result { + let _: PeerId = verify_presented_certs(end_entity, intermediates)?; + + Ok(ClientCertVerified::assertion()) + } + + fn verify_tls12_signature( + &self, + _message: &[u8], + _cert: &CertificateDer<'_>, + _dss: &DigitallySignedStruct, + ) -> Result { + unreachable!("`PROTOCOL_VERSIONS` only allows TLS 1.3") + } + + fn verify_tls13_signature( + &self, + message: &[u8], + cert: &CertificateDer<'_>, + dss: &DigitallySignedStruct, + ) -> Result { + verify_tls13_signature(cert, dss.scheme, message, dss.signature()) + } + + fn supported_verify_schemes(&self) -> Vec { + Self::verification_schemes() + } } /// When receiving the certificate chain, an endpoint @@ -195,52 +193,48 @@ impl ClientCertVerifier for Libp2pCertificateVerifier { /// Endpoints MUST abort the connection attempt if more than one certificate is received, /// or if the certificate's self-signature is not valid. fn verify_presented_certs( - end_entity: &CertificateDer<'_>, - intermediates: &[CertificateDer<'_>], + end_entity: &CertificateDer<'_>, + intermediates: &[CertificateDer<'_>], ) -> Result { - if !intermediates.is_empty() { - return Err(rustls::Error::General( - "libp2p-tls requires exactly one certificate".into(), - )); - } + if !intermediates.is_empty() { + return Err(rustls::Error::General("libp2p-tls requires exactly one certificate".into())); + } - let cert = certificate::parse(end_entity)?; + let cert = certificate::parse(end_entity)?; - Ok(cert.peer_id()) + Ok(cert.peer_id()) } fn verify_tls13_signature( - cert: &CertificateDer<'_>, - signature_scheme: SignatureScheme, - message: &[u8], - signature: &[u8], + cert: &CertificateDer<'_>, + signature_scheme: SignatureScheme, + message: &[u8], + signature: &[u8], ) -> Result { - certificate::parse(cert)?.verify_signature(signature_scheme, message, signature)?; + certificate::parse(cert)?.verify_signature(signature_scheme, message, signature)?; - Ok(HandshakeSignatureValid::assertion()) + Ok(HandshakeSignatureValid::assertion()) } impl From for rustls::Error { - fn from(certificate::ParseError(e): certificate::ParseError) -> Self { - use webpki::Error::*; - match e { - BadDer => rustls::Error::InvalidCertificate(rustls::CertificateError::BadEncoding), - e => rustls::Error::General(format!("invalid peer certificate: {e}")), - } - } + fn from(certificate::ParseError(e): certificate::ParseError) -> Self { + use webpki::Error::*; + match e { + BadDer => rustls::Error::InvalidCertificate(rustls::CertificateError::BadEncoding), + e => rustls::Error::General(format!("invalid peer certificate: {e}")), + } + } } impl From for rustls::Error { - fn from(certificate::VerificationError(e): certificate::VerificationError) -> Self { - use webpki::Error::*; - match e { - InvalidSignatureForPublicKey => { - rustls::Error::InvalidCertificate(rustls::CertificateError::BadSignature) - } - UnsupportedSignatureAlgorithm | UnsupportedSignatureAlgorithmForPublicKey => { - rustls::Error::General("unsupported signature algorithm".into()) - } - e => rustls::Error::General(format!("invalid peer certificate: {e}")), - } - } + fn from(certificate::VerificationError(e): certificate::VerificationError) -> Self { + use webpki::Error::*; + match e { + InvalidSignatureForPublicKey => + rustls::Error::InvalidCertificate(rustls::CertificateError::BadSignature), + UnsupportedSignatureAlgorithm | UnsupportedSignatureAlgorithmForPublicKey => + rustls::Error::General("unsupported signature algorithm".into()), + e => rustls::Error::General(format!("invalid peer certificate: {e}")), + } + } } diff --git a/client/litep2p/src/error.rs b/client/litep2p/src/error.rs index e42eb171..f1f89549 100644 --- a/client/litep2p/src/error.rs +++ b/client/litep2p/src/error.rs @@ -24,10 +24,10 @@ //! [`Litep2p`](`crate::Litep2p`) error types. use crate::{ - protocol::Direction, - transport::manager::limits::ConnectionLimitsError, - types::{protocol::ProtocolName, ConnectionId, SubstreamId}, - PeerId, + protocol::Direction, + transport::manager::limits::ConnectionLimitsError, + types::{protocol::ProtocolName, ConnectionId, SubstreamId}, + PeerId, }; use multiaddr::Multiaddr; @@ -40,313 +40,313 @@ use std::io::{self, ErrorKind}; #[allow(clippy::large_enum_variant)] #[derive(Debug, thiserror::Error)] pub enum Error { - #[error("Peer `{0}` does not exist")] - PeerDoesntExist(PeerId), - #[error("Peer `{0}` already exists")] - PeerAlreadyExists(PeerId), - #[error("Protocol `{0}` not supported")] - ProtocolNotSupported(String), - #[error("Address error: `{0}`")] - AddressError(#[from] AddressError), - #[error("Parse error: `{0}`")] - ParseError(ParseError), - #[error("I/O error: `{0}`")] - IoError(ErrorKind), - #[error("Negotiation error: `{0}`")] - NegotiationError(#[from] NegotiationError), - #[error("Substream error: `{0}`")] - SubstreamError(#[from] SubstreamError), - #[error("Substream error: `{0}`")] - NotificationError(NotificationError), - #[error("Essential task closed")] - EssentialTaskClosed, - #[error("Unknown error occurred")] - Unknown, - #[error("Cannot dial self: `{0}`")] - CannotDialSelf(Multiaddr), - #[error("Transport not supported")] - TransportNotSupported(Multiaddr), - #[error("Yamux error for substream `{0:?}`: `{1}`")] - YamuxError(Direction, crate::yamux::ConnectionError), - #[error("Operation not supported: `{0}`")] - NotSupported(String), - #[error("Other error occurred: `{0}`")] - Other(String), - #[error("Protocol already exists: `{0:?}`")] - ProtocolAlreadyExists(ProtocolName), - #[error("Operation timed out")] - Timeout, - #[error("Invalid state transition")] - InvalidState, - #[error("DNS address resolution failed")] - DnsAddressResolutionFailed, - #[error("Transport error: `{0}`")] - TransportError(String), - #[cfg(feature = "quic")] - #[error("Failed to generate certificate: `{0}`")] - CertificateGeneration(#[from] crate::crypto::tls::certificate::GenError), - #[error("Invalid data")] - InvalidData, - #[error("Input rejected")] - InputRejected, - #[cfg(feature = "websocket")] - #[error("WebSocket error: `{0}`")] - WebSocket(#[from] tokio_tungstenite::tungstenite::error::Error), - #[error("Insufficient peers")] - InsufficientPeers, - #[error("Substream doens't exist")] - SubstreamDoesntExist, - #[cfg(feature = "webrtc")] - #[error("`str0m` error: `{0}`")] - WebRtc(#[from] str0m::RtcError), - #[error("Remote peer disconnected")] - Disconnected, - #[error("Channel does not exist")] - ChannelDoesntExist, - #[error("Tried to dial self")] - TriedToDialSelf, - #[error("Litep2p is already connected to the peer")] - AlreadyConnected, - #[error("No addres available for `{0}`")] - NoAddressAvailable(PeerId), - #[error("Connection closed")] - ConnectionClosed, - #[cfg(feature = "quic")] - #[error("Quinn error: `{0}`")] - Quinn(quinn::ConnectionError), - #[error("Invalid certificate")] - InvalidCertificate, - #[error("Peer ID mismatch: expected `{0}`, got `{1}`")] - PeerIdMismatch(PeerId, PeerId), - #[error("Channel is clogged")] - ChannelClogged, - #[error("Connection doesn't exist: `{0:?}`")] - ConnectionDoesntExist(ConnectionId), - #[error("Exceeded connection limits `{0:?}`")] - ConnectionLimit(ConnectionLimitsError), - #[error("Failed to dial peer immediately")] - ImmediateDialError(#[from] ImmediateDialError), - #[error("Cannot read system DNS config: `{0}`")] - CannotReadSystemDnsConfig(hickory_resolver::ResolveError), + #[error("Peer `{0}` does not exist")] + PeerDoesntExist(PeerId), + #[error("Peer `{0}` already exists")] + PeerAlreadyExists(PeerId), + #[error("Protocol `{0}` not supported")] + ProtocolNotSupported(String), + #[error("Address error: `{0}`")] + AddressError(#[from] AddressError), + #[error("Parse error: `{0}`")] + ParseError(ParseError), + #[error("I/O error: `{0}`")] + IoError(ErrorKind), + #[error("Negotiation error: `{0}`")] + NegotiationError(#[from] NegotiationError), + #[error("Substream error: `{0}`")] + SubstreamError(#[from] SubstreamError), + #[error("Substream error: `{0}`")] + NotificationError(NotificationError), + #[error("Essential task closed")] + EssentialTaskClosed, + #[error("Unknown error occurred")] + Unknown, + #[error("Cannot dial self: `{0}`")] + CannotDialSelf(Multiaddr), + #[error("Transport not supported")] + TransportNotSupported(Multiaddr), + #[error("Yamux error for substream `{0:?}`: `{1}`")] + YamuxError(Direction, crate::yamux::ConnectionError), + #[error("Operation not supported: `{0}`")] + NotSupported(String), + #[error("Other error occurred: `{0}`")] + Other(String), + #[error("Protocol already exists: `{0:?}`")] + ProtocolAlreadyExists(ProtocolName), + #[error("Operation timed out")] + Timeout, + #[error("Invalid state transition")] + InvalidState, + #[error("DNS address resolution failed")] + DnsAddressResolutionFailed, + #[error("Transport error: `{0}`")] + TransportError(String), + #[cfg(feature = "quic")] + #[error("Failed to generate certificate: `{0}`")] + CertificateGeneration(#[from] crate::crypto::tls::certificate::GenError), + #[error("Invalid data")] + InvalidData, + #[error("Input rejected")] + InputRejected, + #[cfg(feature = "websocket")] + #[error("WebSocket error: `{0}`")] + WebSocket(#[from] tokio_tungstenite::tungstenite::error::Error), + #[error("Insufficient peers")] + InsufficientPeers, + #[error("Substream doens't exist")] + SubstreamDoesntExist, + #[cfg(feature = "webrtc")] + #[error("`str0m` error: `{0}`")] + WebRtc(#[from] str0m::RtcError), + #[error("Remote peer disconnected")] + Disconnected, + #[error("Channel does not exist")] + ChannelDoesntExist, + #[error("Tried to dial self")] + TriedToDialSelf, + #[error("Litep2p is already connected to the peer")] + AlreadyConnected, + #[error("No addres available for `{0}`")] + NoAddressAvailable(PeerId), + #[error("Connection closed")] + ConnectionClosed, + #[cfg(feature = "quic")] + #[error("Quinn error: `{0}`")] + Quinn(quinn::ConnectionError), + #[error("Invalid certificate")] + InvalidCertificate, + #[error("Peer ID mismatch: expected `{0}`, got `{1}`")] + PeerIdMismatch(PeerId, PeerId), + #[error("Channel is clogged")] + ChannelClogged, + #[error("Connection doesn't exist: `{0:?}`")] + ConnectionDoesntExist(ConnectionId), + #[error("Exceeded connection limits `{0:?}`")] + ConnectionLimit(ConnectionLimitsError), + #[error("Failed to dial peer immediately")] + ImmediateDialError(#[from] ImmediateDialError), + #[error("Cannot read system DNS config: `{0}`")] + CannotReadSystemDnsConfig(hickory_resolver::ResolveError), } /// Error type for address parsing. #[derive(Debug, thiserror::Error)] pub enum AddressError { - /// The provided address does not correspond to the transport protocol. - /// - /// For example, this can happen when the address used the UDP protocol but - /// the handling transport only allows TCP connections. - #[error("Invalid address for protocol")] - InvalidProtocol, - /// The provided address is not a valid URL. - #[error("Invalid URL")] - InvalidUrl, - /// The provided address does not include a peer ID. - #[error("`PeerId` missing from the address")] - PeerIdMissing, - /// No address is available for the provided peer ID. - #[error("Address not available")] - AddressNotAvailable, - /// The provided address contains an invalid multihash. - #[error("Multihash does not contain a valid peer ID : `{0:?}`")] - InvalidPeerId(Multihash), + /// The provided address does not correspond to the transport protocol. + /// + /// For example, this can happen when the address used the UDP protocol but + /// the handling transport only allows TCP connections. + #[error("Invalid address for protocol")] + InvalidProtocol, + /// The provided address is not a valid URL. + #[error("Invalid URL")] + InvalidUrl, + /// The provided address does not include a peer ID. + #[error("`PeerId` missing from the address")] + PeerIdMissing, + /// No address is available for the provided peer ID. + #[error("Address not available")] + AddressNotAvailable, + /// The provided address contains an invalid multihash. + #[error("Multihash does not contain a valid peer ID : `{0:?}`")] + InvalidPeerId(Multihash), } #[derive(Debug, thiserror::Error, PartialEq)] pub enum ParseError { - /// The provided probuf message cannot be decoded. - #[error("Failed to decode protobuf message: `{0:?}`")] - ProstDecodeError(#[from] prost::DecodeError), - /// The provided protobuf message cannot be encoded. - #[error("Failed to encode protobuf message: `{0:?}`")] - ProstEncodeError(#[from] prost::EncodeError), - /// The protobuf message contains an unexpected key type. - /// - /// This error can happen when: - /// - The provided key type is not recognized. - /// - The provided key type is recognized but not supported. - #[error("Unknown key type from protobuf message: `{0}`")] - UnknownKeyType(i32), - /// The public key bytes are invalid and cannot be parsed. - /// - /// This error can happen when: - /// - The received number of bytes is not equal to the expected number of bytes (32 bytes). - /// - The bytes are not a valid Ed25519 public key. - /// - Length of the public key is not represented by 2 bytes (WebRTC specific). - #[error("Invalid public key")] - InvalidPublicKey, - /// The provided date has an invalid format. - /// - /// This error is protocol specific. - #[error("Invalid data")] - InvalidData, - /// The provided reply length is not valid - #[error("Invalid reply length")] - InvalidReplyLength, + /// The provided probuf message cannot be decoded. + #[error("Failed to decode protobuf message: `{0:?}`")] + ProstDecodeError(#[from] prost::DecodeError), + /// The provided protobuf message cannot be encoded. + #[error("Failed to encode protobuf message: `{0:?}`")] + ProstEncodeError(#[from] prost::EncodeError), + /// The protobuf message contains an unexpected key type. + /// + /// This error can happen when: + /// - The provided key type is not recognized. + /// - The provided key type is recognized but not supported. + #[error("Unknown key type from protobuf message: `{0}`")] + UnknownKeyType(i32), + /// The public key bytes are invalid and cannot be parsed. + /// + /// This error can happen when: + /// - The received number of bytes is not equal to the expected number of bytes (32 bytes). + /// - The bytes are not a valid Ed25519 public key. + /// - Length of the public key is not represented by 2 bytes (WebRTC specific). + #[error("Invalid public key")] + InvalidPublicKey, + /// The provided date has an invalid format. + /// + /// This error is protocol specific. + #[error("Invalid data")] + InvalidData, + /// The provided reply length is not valid + #[error("Invalid reply length")] + InvalidReplyLength, } #[derive(Debug, thiserror::Error)] pub enum SubstreamError { - // Note: this can mean as well `SubstreamClosed`. - #[error("Connection closed")] - ConnectionClosed, - #[error("Connection channel clogged")] - ChannelClogged, - #[error("Connection to peer does not exist: `{0}`")] - PeerDoesNotExist(PeerId), - #[error("I/O error: `{0}`")] - IoError(ErrorKind), - #[error("yamux error: `{0}`")] - YamuxError(crate::yamux::ConnectionError, Direction), - #[error("Failed to read from substream, substream id `{0:?}`")] - ReadFailure(Option), - #[error("Failed to write to substream, substream id `{0:?}`")] - WriteFailure(Option), - #[error("Negotiation error: `{0:?}`")] - NegotiationError(#[from] NegotiationError), + // Note: this can mean as well `SubstreamClosed`. + #[error("Connection closed")] + ConnectionClosed, + #[error("Connection channel clogged")] + ChannelClogged, + #[error("Connection to peer does not exist: `{0}`")] + PeerDoesNotExist(PeerId), + #[error("I/O error: `{0}`")] + IoError(ErrorKind), + #[error("yamux error: `{0}`")] + YamuxError(crate::yamux::ConnectionError, Direction), + #[error("Failed to read from substream, substream id `{0:?}`")] + ReadFailure(Option), + #[error("Failed to write to substream, substream id `{0:?}`")] + WriteFailure(Option), + #[error("Negotiation error: `{0:?}`")] + NegotiationError(#[from] NegotiationError), } // Libp2p yamux does not implement PartialEq for ConnectionError. impl PartialEq for SubstreamError { - fn eq(&self, other: &Self) -> bool { - match (self, other) { - (Self::ConnectionClosed, Self::ConnectionClosed) => true, - (Self::ChannelClogged, Self::ChannelClogged) => true, - (Self::PeerDoesNotExist(lhs), Self::PeerDoesNotExist(rhs)) => lhs == rhs, - (Self::IoError(lhs), Self::IoError(rhs)) => lhs == rhs, - (Self::YamuxError(lhs, lhs_1), Self::YamuxError(rhs, rhs_1)) => { - if lhs_1 != rhs_1 { - return false; - } - - match (lhs, rhs) { - ( - crate::yamux::ConnectionError::Io(lhs), - crate::yamux::ConnectionError::Io(rhs), - ) => lhs.kind() == rhs.kind(), - ( - crate::yamux::ConnectionError::Decode(lhs), - crate::yamux::ConnectionError::Decode(rhs), - ) => match (lhs, rhs) { - ( - crate::yamux::FrameDecodeError::Io(lhs), - crate::yamux::FrameDecodeError::Io(rhs), - ) => lhs.kind() == rhs.kind(), - ( - crate::yamux::FrameDecodeError::FrameTooLarge(lhs), - crate::yamux::FrameDecodeError::FrameTooLarge(rhs), - ) => lhs == rhs, - ( - crate::yamux::FrameDecodeError::Header(lhs), - crate::yamux::FrameDecodeError::Header(rhs), - ) => match (lhs, rhs) { - ( - crate::yamux::HeaderDecodeError::Version(lhs), - crate::yamux::HeaderDecodeError::Version(rhs), - ) => lhs == rhs, - ( - crate::yamux::HeaderDecodeError::Type(lhs), - crate::yamux::HeaderDecodeError::Type(rhs), - ) => lhs == rhs, - _ => false, - }, - _ => false, - }, - ( - crate::yamux::ConnectionError::NoMoreStreamIds, - crate::yamux::ConnectionError::NoMoreStreamIds, - ) => true, - ( - crate::yamux::ConnectionError::Closed, - crate::yamux::ConnectionError::Closed, - ) => true, - ( - crate::yamux::ConnectionError::TooManyStreams, - crate::yamux::ConnectionError::TooManyStreams, - ) => true, - _ => false, - } - } - - (Self::ReadFailure(lhs), Self::ReadFailure(rhs)) => lhs == rhs, - (Self::WriteFailure(lhs), Self::WriteFailure(rhs)) => lhs == rhs, - (Self::NegotiationError(lhs), Self::NegotiationError(rhs)) => lhs == rhs, - _ => false, - } - } + fn eq(&self, other: &Self) -> bool { + match (self, other) { + (Self::ConnectionClosed, Self::ConnectionClosed) => true, + (Self::ChannelClogged, Self::ChannelClogged) => true, + (Self::PeerDoesNotExist(lhs), Self::PeerDoesNotExist(rhs)) => lhs == rhs, + (Self::IoError(lhs), Self::IoError(rhs)) => lhs == rhs, + (Self::YamuxError(lhs, lhs_1), Self::YamuxError(rhs, rhs_1)) => { + if lhs_1 != rhs_1 { + return false; + } + + match (lhs, rhs) { + ( + crate::yamux::ConnectionError::Io(lhs), + crate::yamux::ConnectionError::Io(rhs), + ) => lhs.kind() == rhs.kind(), + ( + crate::yamux::ConnectionError::Decode(lhs), + crate::yamux::ConnectionError::Decode(rhs), + ) => match (lhs, rhs) { + ( + crate::yamux::FrameDecodeError::Io(lhs), + crate::yamux::FrameDecodeError::Io(rhs), + ) => lhs.kind() == rhs.kind(), + ( + crate::yamux::FrameDecodeError::FrameTooLarge(lhs), + crate::yamux::FrameDecodeError::FrameTooLarge(rhs), + ) => lhs == rhs, + ( + crate::yamux::FrameDecodeError::Header(lhs), + crate::yamux::FrameDecodeError::Header(rhs), + ) => match (lhs, rhs) { + ( + crate::yamux::HeaderDecodeError::Version(lhs), + crate::yamux::HeaderDecodeError::Version(rhs), + ) => lhs == rhs, + ( + crate::yamux::HeaderDecodeError::Type(lhs), + crate::yamux::HeaderDecodeError::Type(rhs), + ) => lhs == rhs, + _ => false, + }, + _ => false, + }, + ( + crate::yamux::ConnectionError::NoMoreStreamIds, + crate::yamux::ConnectionError::NoMoreStreamIds, + ) => true, + ( + crate::yamux::ConnectionError::Closed, + crate::yamux::ConnectionError::Closed, + ) => true, + ( + crate::yamux::ConnectionError::TooManyStreams, + crate::yamux::ConnectionError::TooManyStreams, + ) => true, + _ => false, + } + }, + + (Self::ReadFailure(lhs), Self::ReadFailure(rhs)) => lhs == rhs, + (Self::WriteFailure(lhs), Self::WriteFailure(rhs)) => lhs == rhs, + (Self::NegotiationError(lhs), Self::NegotiationError(rhs)) => lhs == rhs, + _ => false, + } + } } /// Error during the negotiation phase. #[derive(Debug, thiserror::Error)] pub enum NegotiationError { - /// Error occurred during the multistream-select phase of the negotiation. - #[error("multistream-select error: `{0:?}`")] - MultistreamSelectError(#[from] crate::multistream_select::NegotiationError), - /// Error occurred during the Noise handshake negotiation (Clatter/pqXX). - #[error("clatter error: `{0}`")] - Clatter(String), - /// The peer ID was not provided by the noise handshake. - #[error("`PeerId` missing from Noise handshake")] - PeerIdMissing, - /// The remote peer ID is not the same as the one expected. - #[error("The signature of the remote identity's public key does not verify")] - BadSignature, - /// The negotiation operation timed out. - #[error("Operation timed out")] - Timeout, - /// The message provided over the wire has an invalid format or is unsupported. - #[error("Parse error: `{0}`")] - ParseError(#[from] ParseError), - /// An I/O error occurred during the negotiation process. - #[error("I/O error: `{0}`")] - IoError(ErrorKind), - /// Expected a different state during the negotiation process. - #[error("Expected a different state")] - StateMismatch, - /// The noise handshake provided a different peer ID than the one expected in the dialing - /// address. - #[error("Peer ID mismatch: expected `{0}`, got `{1}`")] - PeerIdMismatch(PeerId, PeerId), - /// Error specific to the QUIC transport. - #[cfg(feature = "quic")] - #[error("QUIC error: `{0}`")] - Quic(#[from] QuicError), - /// Error specific to the WebSocket transport. - #[cfg(feature = "websocket")] - #[error("WebSocket error: `{0}`")] - WebSocket(#[from] tokio_tungstenite::tungstenite::error::Error), + /// Error occurred during the multistream-select phase of the negotiation. + #[error("multistream-select error: `{0:?}`")] + MultistreamSelectError(#[from] crate::multistream_select::NegotiationError), + /// Error occurred during the Noise handshake negotiation (Clatter/pqXX). + #[error("clatter error: `{0}`")] + Clatter(String), + /// The peer ID was not provided by the noise handshake. + #[error("`PeerId` missing from Noise handshake")] + PeerIdMissing, + /// The remote peer ID is not the same as the one expected. + #[error("The signature of the remote identity's public key does not verify")] + BadSignature, + /// The negotiation operation timed out. + #[error("Operation timed out")] + Timeout, + /// The message provided over the wire has an invalid format or is unsupported. + #[error("Parse error: `{0}`")] + ParseError(#[from] ParseError), + /// An I/O error occurred during the negotiation process. + #[error("I/O error: `{0}`")] + IoError(ErrorKind), + /// Expected a different state during the negotiation process. + #[error("Expected a different state")] + StateMismatch, + /// The noise handshake provided a different peer ID than the one expected in the dialing + /// address. + #[error("Peer ID mismatch: expected `{0}`, got `{1}`")] + PeerIdMismatch(PeerId, PeerId), + /// Error specific to the QUIC transport. + #[cfg(feature = "quic")] + #[error("QUIC error: `{0}`")] + Quic(#[from] QuicError), + /// Error specific to the WebSocket transport. + #[cfg(feature = "websocket")] + #[error("WebSocket error: `{0}`")] + WebSocket(#[from] tokio_tungstenite::tungstenite::error::Error), } impl PartialEq for NegotiationError { - fn eq(&self, other: &Self) -> bool { - match (self, other) { - (Self::MultistreamSelectError(lhs), Self::MultistreamSelectError(rhs)) => lhs == rhs, - (Self::Clatter(lhs), Self::Clatter(rhs)) => lhs == rhs, - (Self::ParseError(lhs), Self::ParseError(rhs)) => lhs == rhs, - (Self::IoError(lhs), Self::IoError(rhs)) => lhs == rhs, - (Self::PeerIdMismatch(lhs, lhs_1), Self::PeerIdMismatch(rhs, rhs_1)) => - lhs == rhs && lhs_1 == rhs_1, - #[cfg(feature = "quic")] - (Self::Quic(lhs), Self::Quic(rhs)) => lhs == rhs, - #[cfg(feature = "websocket")] - (Self::WebSocket(lhs), Self::WebSocket(rhs)) => - core::mem::discriminant(lhs) == core::mem::discriminant(rhs), - _ => core::mem::discriminant(self) == core::mem::discriminant(other), - } - } + fn eq(&self, other: &Self) -> bool { + match (self, other) { + (Self::MultistreamSelectError(lhs), Self::MultistreamSelectError(rhs)) => lhs == rhs, + (Self::Clatter(lhs), Self::Clatter(rhs)) => lhs == rhs, + (Self::ParseError(lhs), Self::ParseError(rhs)) => lhs == rhs, + (Self::IoError(lhs), Self::IoError(rhs)) => lhs == rhs, + (Self::PeerIdMismatch(lhs, lhs_1), Self::PeerIdMismatch(rhs, rhs_1)) => + lhs == rhs && lhs_1 == rhs_1, + #[cfg(feature = "quic")] + (Self::Quic(lhs), Self::Quic(rhs)) => lhs == rhs, + #[cfg(feature = "websocket")] + (Self::WebSocket(lhs), Self::WebSocket(rhs)) => + core::mem::discriminant(lhs) == core::mem::discriminant(rhs), + _ => core::mem::discriminant(self) == core::mem::discriminant(other), + } + } } #[derive(Debug, thiserror::Error)] pub enum NotificationError { - #[error("Peer already exists")] - PeerAlreadyExists, - #[error("Peer is in invalid state")] - InvalidState, - #[error("Notifications clogged")] - NotificationsClogged, - #[error("Notification stream closed")] - NotificationStreamClosed(PeerId), + #[error("Peer already exists")] + PeerAlreadyExists, + #[error("Peer is in invalid state")] + InvalidState, + #[error("Notifications clogged")] + NotificationsClogged, + #[error("Notification stream closed")] + NotificationStreamClosed(PeerId), } /// The error type for dialing a peer. @@ -355,199 +355,199 @@ pub enum NotificationError { /// a network dialing operation. #[derive(Debug, thiserror::Error)] pub enum DialError { - /// The dialing operation timed out. - /// - /// This error indicates that the `connection_open_timeout` from the protocol configuration - /// was exceeded. - #[error("Dial timed out")] - Timeout, - /// The provided address for dialing is invalid. - #[error("Address error: `{0}`")] - AddressError(#[from] AddressError), - /// An error occurred during DNS lookup operation. - /// - /// The address provided may be valid, however it failed to resolve to a concrete IP address. - /// This error may be recoverable. - #[error("DNS lookup error for `{0}`")] - DnsError(#[from] DnsError), - /// An error occurred during the negotiation process. - #[error("Negotiation error: `{0}`")] - NegotiationError(#[from] NegotiationError), + /// The dialing operation timed out. + /// + /// This error indicates that the `connection_open_timeout` from the protocol configuration + /// was exceeded. + #[error("Dial timed out")] + Timeout, + /// The provided address for dialing is invalid. + #[error("Address error: `{0}`")] + AddressError(#[from] AddressError), + /// An error occurred during DNS lookup operation. + /// + /// The address provided may be valid, however it failed to resolve to a concrete IP address. + /// This error may be recoverable. + #[error("DNS lookup error for `{0}`")] + DnsError(#[from] DnsError), + /// An error occurred during the negotiation process. + #[error("Negotiation error: `{0}`")] + NegotiationError(#[from] NegotiationError), } /// Dialing resulted in an immediate error before performing any network operations. #[derive(Debug, thiserror::Error, Copy, Clone, Eq, PartialEq)] pub enum ImmediateDialError { - /// The provided address does not include a peer ID. - #[error("`PeerId` missing from the address")] - PeerIdMissing, - /// The peer ID provided in the address is the same as the local peer ID. - #[error("Tried to dial self")] - TriedToDialSelf, - /// Cannot dial an already connected peer. - #[error("Already connected to peer")] - AlreadyConnected, - /// Cannot dial a peer that does not have any address available. - #[error("No address available for peer")] - NoAddressAvailable, - /// The essential task was closed. - #[error("TaskClosed")] - TaskClosed, - /// The channel is clogged. - #[error("Connection channel clogged")] - ChannelClogged, + /// The provided address does not include a peer ID. + #[error("`PeerId` missing from the address")] + PeerIdMissing, + /// The peer ID provided in the address is the same as the local peer ID. + #[error("Tried to dial self")] + TriedToDialSelf, + /// Cannot dial an already connected peer. + #[error("Already connected to peer")] + AlreadyConnected, + /// Cannot dial a peer that does not have any address available. + #[error("No address available for peer")] + NoAddressAvailable, + /// The essential task was closed. + #[error("TaskClosed")] + TaskClosed, + /// The channel is clogged. + #[error("Connection channel clogged")] + ChannelClogged, } /// Error during the QUIC transport negotiation. #[cfg(feature = "quic")] #[derive(Debug, thiserror::Error, PartialEq)] pub enum QuicError { - /// The provided certificate is invalid. - #[error("Invalid certificate")] - InvalidCertificate, - /// The connection was lost. - #[error("Failed to negotiate QUIC: `{0}`")] - ConnectionError(#[from] quinn::ConnectionError), - /// The connection could not be established. - #[error("Failed to connect to peer: `{0}`")] - ConnectError(#[from] quinn::ConnectError), + /// The provided certificate is invalid. + #[error("Invalid certificate")] + InvalidCertificate, + /// The connection was lost. + #[error("Failed to negotiate QUIC: `{0}`")] + ConnectionError(#[from] quinn::ConnectionError), + /// The connection could not be established. + #[error("Failed to connect to peer: `{0}`")] + ConnectError(#[from] quinn::ConnectError), } /// Error during DNS resolution. #[derive(Debug, thiserror::Error, PartialEq)] pub enum DnsError { - /// The DNS resolution failed to resolve the provided URL. - #[error("DNS failed to resolve url `{0}`")] - ResolveError(String), - /// The DNS expected a different IP address version. - /// - /// For example, DNSv4 was expected but DNSv6 was provided. - #[error("DNS type is different from the provided IP address")] - IpVersionMismatch, + /// The DNS resolution failed to resolve the provided URL. + #[error("DNS failed to resolve url `{0}`")] + ResolveError(String), + /// The DNS expected a different IP address version. + /// + /// For example, DNSv4 was expected but DNSv6 was provided. + #[error("DNS type is different from the provided IP address")] + IpVersionMismatch, } impl From> for Error { - fn from(hash: MultihashGeneric<64>) -> Self { - Error::AddressError(AddressError::InvalidPeerId(hash)) - } + fn from(hash: MultihashGeneric<64>) -> Self { + Error::AddressError(AddressError::InvalidPeerId(hash)) + } } impl From for Error { - fn from(error: io::Error) -> Error { - Error::IoError(error.kind()) - } + fn from(error: io::Error) -> Error { + Error::IoError(error.kind()) + } } impl From for SubstreamError { - fn from(error: io::Error) -> SubstreamError { - SubstreamError::IoError(error.kind()) - } + fn from(error: io::Error) -> SubstreamError { + SubstreamError::IoError(error.kind()) + } } impl From for DialError { - fn from(error: io::Error) -> Self { - DialError::NegotiationError(NegotiationError::IoError(error.kind())) - } + fn from(error: io::Error) -> Self { + DialError::NegotiationError(NegotiationError::IoError(error.kind())) + } } impl From for Error { - fn from(error: crate::multistream_select::NegotiationError) -> Error { - Error::NegotiationError(NegotiationError::MultistreamSelectError(error)) - } + fn from(error: crate::multistream_select::NegotiationError) -> Error { + Error::NegotiationError(NegotiationError::MultistreamSelectError(error)) + } } impl From> for Error { - fn from(_: tokio::sync::mpsc::error::SendError) -> Self { - Error::EssentialTaskClosed - } + fn from(_: tokio::sync::mpsc::error::SendError) -> Self { + Error::EssentialTaskClosed + } } impl From for Error { - fn from(_: tokio::sync::oneshot::error::RecvError) -> Self { - Error::EssentialTaskClosed - } + fn from(_: tokio::sync::oneshot::error::RecvError) -> Self { + Error::EssentialTaskClosed + } } impl From for Error { - fn from(error: prost::DecodeError) -> Self { - Error::ParseError(ParseError::ProstDecodeError(error)) - } + fn from(error: prost::DecodeError) -> Self { + Error::ParseError(ParseError::ProstDecodeError(error)) + } } impl From for Error { - fn from(error: prost::EncodeError) -> Self { - Error::ParseError(ParseError::ProstEncodeError(error)) - } + fn from(error: prost::EncodeError) -> Self { + Error::ParseError(ParseError::ProstEncodeError(error)) + } } impl From for NegotiationError { - fn from(error: io::Error) -> Self { - NegotiationError::IoError(error.kind()) - } + fn from(error: io::Error) -> Self { + NegotiationError::IoError(error.kind()) + } } impl From for Error { - fn from(error: ParseError) -> Self { - Error::ParseError(error) - } + fn from(error: ParseError) -> Self { + Error::ParseError(error) + } } impl From> for AddressError { - fn from(hash: MultihashGeneric<64>) -> Self { - AddressError::InvalidPeerId(hash) - } + fn from(hash: MultihashGeneric<64>) -> Self { + AddressError::InvalidPeerId(hash) + } } #[cfg(feature = "quic")] impl From for Error { - fn from(error: quinn::ConnectionError) -> Self { - match error { - quinn::ConnectionError::TimedOut => Error::Timeout, - error => Error::Quinn(error), - } - } + fn from(error: quinn::ConnectionError) -> Self { + match error { + quinn::ConnectionError::TimedOut => Error::Timeout, + error => Error::Quinn(error), + } + } } #[cfg(feature = "quic")] impl From for DialError { - fn from(error: quinn::ConnectionError) -> Self { - match error { - quinn::ConnectionError::TimedOut => DialError::Timeout, - error => DialError::NegotiationError(NegotiationError::Quic(error.into())), - } - } + fn from(error: quinn::ConnectionError) -> Self { + match error { + quinn::ConnectionError::TimedOut => DialError::Timeout, + error => DialError::NegotiationError(NegotiationError::Quic(error.into())), + } + } } #[cfg(feature = "quic")] impl From for DialError { - fn from(error: quinn::ConnectError) -> Self { - DialError::NegotiationError(NegotiationError::Quic(error.into())) - } + fn from(error: quinn::ConnectError) -> Self { + DialError::NegotiationError(NegotiationError::Quic(error.into())) + } } impl From for Error { - fn from(error: ConnectionLimitsError) -> Self { - Error::ConnectionLimit(error) - } + fn from(error: ConnectionLimitsError) -> Self { + Error::ConnectionLimit(error) + } } #[cfg(test)] mod tests { - use super::*; - use tokio::sync::mpsc::{channel, Sender}; - - #[tokio::test] - async fn try_from_errors() { - let (tx, rx) = channel(1); - drop(rx); - - async fn test(tx: Sender<()>) -> crate::Result<()> { - tx.send(()).await.map_err(From::from) - } - - match test(tx).await.unwrap_err() { - Error::EssentialTaskClosed => {} - _ => panic!("invalid error"), - } - } + use super::*; + use tokio::sync::mpsc::{channel, Sender}; + + #[tokio::test] + async fn try_from_errors() { + let (tx, rx) = channel(1); + drop(rx); + + async fn test(tx: Sender<()>) -> crate::Result<()> { + tx.send(()).await.map_err(From::from) + } + + match test(tx).await.unwrap_err() { + Error::EssentialTaskClosed => {}, + _ => panic!("invalid error"), + } + } } diff --git a/client/litep2p/src/executor.rs b/client/litep2p/src/executor.rs index fe8d06ea..9c57f1df 100644 --- a/client/litep2p/src/executor.rs +++ b/client/litep2p/src/executor.rs @@ -24,49 +24,49 @@ use std::{future::Future, pin::Pin}; /// Trait which defines the interface the executor must implement. pub trait Executor: Send + Sync { - /// Start executing a future in the background. - fn run(&self, future: Pin + Send>>); + /// Start executing a future in the background. + fn run(&self, future: Pin + Send>>); - /// Start executing a future in the background and give the future a name; - fn run_with_name(&self, name: &'static str, future: Pin + Send>>); + /// Start executing a future in the background and give the future a name; + fn run_with_name(&self, name: &'static str, future: Pin + Send>>); } /// Default executor, defaults to calling `tokio::spawn()`. pub(crate) struct DefaultExecutor; impl Executor for DefaultExecutor { - fn run(&self, future: Pin + Send>>) { - tokio::spawn(future); - } + fn run(&self, future: Pin + Send>>) { + tokio::spawn(future); + } - fn run_with_name(&self, _: &'static str, future: Pin + Send>>) { - tokio::spawn(future); - } + fn run_with_name(&self, _: &'static str, future: Pin + Send>>) { + tokio::spawn(future); + } } #[cfg(test)] mod tests { - use super::*; - use tokio::sync::mpsc::channel; + use super::*; + use tokio::sync::mpsc::channel; - #[tokio::test] - async fn run_with_name() { - let executor = DefaultExecutor; - let (tx, mut rx) = channel(1); + #[tokio::test] + async fn run_with_name() { + let executor = DefaultExecutor; + let (tx, mut rx) = channel(1); - let sender = tx.clone(); - executor.run(Box::pin(async move { - sender.send(1337usize).await.unwrap(); - })); + let sender = tx.clone(); + executor.run(Box::pin(async move { + sender.send(1337usize).await.unwrap(); + })); - executor.run_with_name( - "test", - Box::pin(async move { - tx.send(1337usize).await.unwrap(); - }), - ); + executor.run_with_name( + "test", + Box::pin(async move { + tx.send(1337usize).await.unwrap(); + }), + ); - assert_eq!(rx.recv().await.unwrap(), 1337usize); - assert_eq!(rx.recv().await.unwrap(), 1337usize); - } + assert_eq!(rx.recv().await.unwrap(), 1337usize); + assert_eq!(rx.recv().await.unwrap(), 1337usize); + } } diff --git a/client/litep2p/src/lib.rs b/client/litep2p/src/lib.rs index 0d09cdcb..ab45a209 100644 --- a/client/litep2p/src/lib.rs +++ b/client/litep2p/src/lib.rs @@ -30,21 +30,21 @@ #![allow(clippy::match_like_matches_macro)] use crate::{ - addresses::PublicAddresses, - config::Litep2pConfig, - error::DialError, - protocol::{ - libp2p::{bitswap::Bitswap, identify::Identify, kademlia::Kademlia, ping::Ping}, - mdns::Mdns, - notification::NotificationProtocol, - request_response::RequestResponseProtocol, - SubstreamKeepAlive, - }, - transport::{ - manager::{SupportedTransport, TransportManager, TransportManagerBuilder}, - tcp::TcpTransport, - TransportBuilder, TransportEvent, - }, + addresses::PublicAddresses, + config::Litep2pConfig, + error::DialError, + protocol::{ + libp2p::{bitswap::Bitswap, identify::Identify, kademlia::Kademlia, ping::Ping}, + mdns::Mdns, + notification::NotificationProtocol, + request_response::RequestResponseProtocol, + SubstreamKeepAlive, + }, + transport::{ + manager::{SupportedTransport, TransportManager, TransportManagerBuilder}, + tcp::TcpTransport, + TransportBuilder, TransportEvent, + }, }; #[cfg(feature = "quic")] @@ -98,584 +98,571 @@ const DEFAULT_CHANNEL_SIZE: usize = 4096usize; /// Litep2p events. #[derive(Debug)] pub enum Litep2pEvent { - /// Connection established to peer. - ConnectionEstablished { - /// Remote peer ID. - peer: PeerId, - - /// Endpoint. - endpoint: Endpoint, - }, - - /// Connection closed to remote peer. - ConnectionClosed { - /// Peer ID. - peer: PeerId, - - /// Connection ID. - connection_id: ConnectionId, - }, - - /// Failed to dial peer. - /// - /// This error can originate from dialing a single peer address. - DialFailure { - /// Address of the peer. - address: Multiaddr, - - /// Dial error. - error: DialError, - }, - - /// A list of multiple dial failures. - ListDialFailures { - /// List of errors. - /// - /// Depending on the transport, the address might be different for each error. - errors: Vec<(Multiaddr, DialError)>, - }, + /// Connection established to peer. + ConnectionEstablished { + /// Remote peer ID. + peer: PeerId, + + /// Endpoint. + endpoint: Endpoint, + }, + + /// Connection closed to remote peer. + ConnectionClosed { + /// Peer ID. + peer: PeerId, + + /// Connection ID. + connection_id: ConnectionId, + }, + + /// Failed to dial peer. + /// + /// This error can originate from dialing a single peer address. + DialFailure { + /// Address of the peer. + address: Multiaddr, + + /// Dial error. + error: DialError, + }, + + /// A list of multiple dial failures. + ListDialFailures { + /// List of errors. + /// + /// Depending on the transport, the address might be different for each error. + errors: Vec<(Multiaddr, DialError)>, + }, } /// [`Litep2p`] object. pub struct Litep2p { - /// Local peer ID. - local_peer_id: PeerId, + /// Local peer ID. + local_peer_id: PeerId, - /// Listen addresses. - listen_addresses: Vec, + /// Listen addresses. + listen_addresses: Vec, - /// Transport manager. - transport_manager: TransportManager, + /// Transport manager. + transport_manager: TransportManager, - /// Bandwidth sink. - bandwidth_sink: BandwidthSink, + /// Bandwidth sink. + bandwidth_sink: BandwidthSink, } impl Litep2p { - /// Create new [`Litep2p`]. - pub fn new(mut litep2p_config: Litep2pConfig) -> crate::Result { - let local_peer_id = PeerId::from_public_key(&litep2p_config.keypair.public().into()); - let bandwidth_sink = BandwidthSink::new(); - let mut listen_addresses = vec![]; - - let (resolver_config, resolver_opts) = if litep2p_config.use_system_dns_config { - hickory_resolver::system_conf::read_system_conf() - .map_err(Error::CannotReadSystemDnsConfig)? - } else { - (Default::default(), Default::default()) - }; - let resolver = Arc::new( - TokioResolver::builder_with_config(resolver_config, TokioConnectionProvider::default()) - .with_options(resolver_opts) - .build(), - ); - - let supported_transports = Self::supported_transports(&litep2p_config); - let mut transport_manager = TransportManagerBuilder::new() - .with_keypair(litep2p_config.keypair.clone()) - .with_supported_transports(supported_transports) - .with_bandwidth_sink(bandwidth_sink.clone()) - .with_connection_limits_config(litep2p_config.connection_limits) - .build(); - - let transport_handle = transport_manager.transport_manager_handle(); - // add known addresses to `TransportManager`, if any exist - if !litep2p_config.known_addresses.is_empty() { - for (peer, addresses) in litep2p_config.known_addresses { - transport_manager.add_known_address(peer, addresses.iter().cloned()); - } - } - - // start notification protocol event loops - for (protocol, config) in litep2p_config.notification_protocols.into_iter() { - tracing::debug!( - target: LOG_TARGET, - ?protocol, - "enable notification protocol", - ); - - let service = transport_manager.register_protocol( - protocol, - config.fallback_names.clone(), - config.codec, - litep2p_config.keep_alive_timeout, - SubstreamKeepAlive::Yes, - ); - let executor = Arc::clone(&litep2p_config.executor); - litep2p_config.executor.run(Box::pin(async move { - NotificationProtocol::new(service, config, executor).run().await - })); - } - - // start request-response protocol event loops - for (protocol, config) in litep2p_config.request_response_protocols.into_iter() { - tracing::debug!( - target: LOG_TARGET, - ?protocol, - "enable request-response protocol", - ); - - let service = transport_manager.register_protocol( - protocol, - config.fallback_names.clone(), - config.codec, - litep2p_config.keep_alive_timeout, - SubstreamKeepAlive::Yes, - ); - litep2p_config.executor.run(Box::pin(async move { - RequestResponseProtocol::new(service, config).run().await - })); - } - - // start user protocol event loops - for (protocol_name, protocol) in litep2p_config.user_protocols.into_iter() { - tracing::debug!(target: LOG_TARGET, protocol = ?protocol_name, "enable user protocol"); - - let service = transport_manager.register_protocol( - protocol_name, - Vec::new(), - protocol.codec(), - litep2p_config.keep_alive_timeout, - // TODO: make configurable by user. - SubstreamKeepAlive::Yes, - ); - litep2p_config.executor.run(Box::pin(async move { - let _ = protocol.run(service).await; - })); - } - - // start ping protocol event loop if enabled - if let Some(ping_config) = litep2p_config.ping.take() { - tracing::debug!( - target: LOG_TARGET, - protocol = ?ping_config.protocol, - "enable ipfs ping protocol", - ); - - let service = transport_manager.register_protocol( - ping_config.protocol.clone(), - Vec::new(), - ping_config.codec, - litep2p_config.keep_alive_timeout, - SubstreamKeepAlive::No, - ); - litep2p_config.executor.run(Box::pin(async move { - Ping::new(service, ping_config).run().await - })); - } - - // start kademlia protocol event loops - for kademlia_config in litep2p_config.kademlia.into_iter() { - tracing::debug!( - target: LOG_TARGET, - protocol_names = ?kademlia_config.protocol_names, - "enable ipfs kademlia protocol", - ); - - let main_protocol = - kademlia_config.protocol_names.first().expect("protocol name to exist"); - let fallback_names = kademlia_config.protocol_names.iter().skip(1).cloned().collect(); - - let service = transport_manager.register_protocol( - main_protocol.clone(), - fallback_names, - kademlia_config.codec, - litep2p_config.keep_alive_timeout, - SubstreamKeepAlive::Yes, - ); - litep2p_config.executor.run(Box::pin(async move { - let _ = Kademlia::new(service, kademlia_config).run().await; - })); - } - - // start identify protocol event loop if enabled - let mut identify_info = match litep2p_config.identify.take() { - None => None, - Some(mut identify_config) => { - tracing::debug!( - target: LOG_TARGET, - protocol = ?identify_config.protocol, - "enable ipfs identify protocol", - ); - - let service = transport_manager.register_protocol( - identify_config.protocol.clone(), - Vec::new(), - identify_config.codec, - litep2p_config.keep_alive_timeout, - SubstreamKeepAlive::No, - ); - identify_config.public = Some(litep2p_config.keypair.public().into()); - - Some((service, identify_config)) - } - }; - - // start bitswap protocol event loop if enabled - if let Some(bitswap_config) = litep2p_config.bitswap.take() { - tracing::debug!( - target: LOG_TARGET, - protocol = ?bitswap_config.protocol, - "enable ipfs bitswap protocol", - ); - - let service = transport_manager.register_protocol( - bitswap_config.protocol.clone(), - Vec::new(), - bitswap_config.codec, - litep2p_config.keep_alive_timeout, - SubstreamKeepAlive::Yes, - ); - litep2p_config.executor.run(Box::pin(async move { - Bitswap::new(service, bitswap_config).run().await - })); - } - - // enable tcp transport if the config exists - if let Some(mut config) = litep2p_config.tcp.take() { - config.max_parallel_dials = litep2p_config.max_parallel_dials; - let handle = transport_manager.transport_handle(Arc::clone(&litep2p_config.executor)); - let (transport, transport_listen_addresses) = - ::new(handle, config, resolver.clone())?; - - for address in transport_listen_addresses { - transport_manager.register_listen_address(address.clone()); - listen_addresses.push(address.with(Protocol::P2p(*local_peer_id.as_ref()))); - } - - transport_manager.register_transport(SupportedTransport::Tcp, Box::new(transport)); - } - - // enable quic transport if the config exists - #[cfg(feature = "quic")] - if let Some(config) = litep2p_config.quic.take() { - let handle = transport_manager.transport_handle(Arc::clone(&litep2p_config.executor)); - let (transport, transport_listen_addresses) = - ::new(handle, config, resolver.clone())?; - - for address in transport_listen_addresses { - transport_manager.register_listen_address(address.clone()); - listen_addresses.push(address.with(Protocol::P2p(*local_peer_id.as_ref()))); - } - - transport_manager.register_transport(SupportedTransport::Quic, Box::new(transport)); - } - - // enable webrtc transport if the config exists - #[cfg(feature = "webrtc")] - if let Some(config) = litep2p_config.webrtc.take() { - let handle = transport_manager.transport_handle(Arc::clone(&litep2p_config.executor)); - let (transport, transport_listen_addresses) = - ::new(handle, config, resolver.clone())?; - - for address in transport_listen_addresses { - transport_manager.register_listen_address(address.clone()); - listen_addresses.push(address.with(Protocol::P2p(*local_peer_id.as_ref()))); - } - - transport_manager.register_transport(SupportedTransport::WebRtc, Box::new(transport)); - } - - // enable websocket transport if the config exists - #[cfg(feature = "websocket")] - if let Some(mut config) = litep2p_config.websocket.take() { - config.max_parallel_dials = litep2p_config.max_parallel_dials; - let handle = transport_manager.transport_handle(Arc::clone(&litep2p_config.executor)); - let (transport, transport_listen_addresses) = - ::new(handle, config, resolver)?; - - for address in transport_listen_addresses { - transport_manager.register_listen_address(address.clone()); - listen_addresses.push(address.with(Protocol::P2p(*local_peer_id.as_ref()))); - } - - transport_manager - .register_transport(SupportedTransport::WebSocket, Box::new(transport)); - } - - // enable mdns if the config exists - if let Some(config) = litep2p_config.mdns.take() { - let mdns = Mdns::new(transport_handle, config, listen_addresses.clone()); - - litep2p_config.executor.run(Box::pin(async move { - let _ = mdns.start().await; - })); - } - - // if identify was enabled, give it the enabled protocols and listen addresses and start it - if let Some((service, mut identify_config)) = identify_info.take() { - identify_config.protocols = transport_manager.protocols().cloned().collect(); - let identify = Identify::new(service, identify_config); - - litep2p_config.executor.run(Box::pin(async move { - let _ = identify.run().await; - })); - } - - if transport_manager.installed_transports().count() == 0 { - return Err(Error::Other("No transport specified".to_string())); - } - - // verify that at least one transport is specified - if listen_addresses.is_empty() { - tracing::warn!( - target: LOG_TARGET, - "litep2p started with no listen addresses, cannot accept inbound connections", - ); - } - - Ok(Self { - local_peer_id, - bandwidth_sink, - listen_addresses, - transport_manager, - }) - } - - /// Collect supported transports before initializing the transports themselves. - /// - /// Information of the supported transports is needed to initialize protocols but - /// information about protocols must be known to initialize transports so the initialization - /// has to be split. - fn supported_transports(config: &Litep2pConfig) -> HashSet { - let mut supported_transports = HashSet::new(); - - config - .tcp - .is_some() - .then(|| supported_transports.insert(SupportedTransport::Tcp)); - #[cfg(feature = "quic")] - config - .quic - .is_some() - .then(|| supported_transports.insert(SupportedTransport::Quic)); - #[cfg(feature = "websocket")] - config - .websocket - .is_some() - .then(|| supported_transports.insert(SupportedTransport::WebSocket)); - #[cfg(feature = "webrtc")] - config - .webrtc - .is_some() - .then(|| supported_transports.insert(SupportedTransport::WebRtc)); - - supported_transports - } - - /// Get local peer ID. - pub fn local_peer_id(&self) -> &PeerId { - &self.local_peer_id - } - - /// Get the list of public addresses of the node. - pub fn public_addresses(&self) -> PublicAddresses { - self.transport_manager.public_addresses() - } - - /// Get the list of listen addresses of the node. - pub fn listen_addresses(&self) -> impl Iterator { - self.listen_addresses.iter() - } - - /// Get handle to bandwidth sink. - pub fn bandwidth_sink(&self) -> BandwidthSink { - self.bandwidth_sink.clone() - } - - /// Dial peer. - pub async fn dial(&mut self, peer: &PeerId) -> crate::Result<()> { - self.transport_manager.dial(*peer).await - } - - /// Dial address. - pub async fn dial_address(&mut self, address: Multiaddr) -> crate::Result<()> { - self.transport_manager.dial_address(address).await - } - - /// Add one ore more known addresses for peer. - /// - /// Return value denotes how many addresses were added for the peer. - /// Addresses belonging to disabled/unsupported transports will be ignored. - pub fn add_known_address( - &mut self, - peer: PeerId, - address: impl Iterator, - ) -> usize { - self.transport_manager.add_known_address(peer, address) - } - - /// Poll next event. - /// - /// This function must be called in order for litep2p to make progress. - pub async fn next_event(&mut self) -> Option { - loop { - match self.transport_manager.next().await? { - TransportEvent::ConnectionEstablished { peer, endpoint, .. } => - return Some(Litep2pEvent::ConnectionEstablished { peer, endpoint }), - TransportEvent::ConnectionClosed { - peer, - connection_id, - } => - return Some(Litep2pEvent::ConnectionClosed { - peer, - connection_id, - }), - TransportEvent::DialFailure { address, error, .. } => - return Some(Litep2pEvent::DialFailure { address, error }), - - TransportEvent::OpenFailure { errors, .. } => { - return Some(Litep2pEvent::ListDialFailures { errors }); - } - _ => {} - } - } - } + /// Create new [`Litep2p`]. + pub fn new(mut litep2p_config: Litep2pConfig) -> crate::Result { + let local_peer_id = PeerId::from_public_key(&litep2p_config.keypair.public().into()); + let bandwidth_sink = BandwidthSink::new(); + let mut listen_addresses = vec![]; + + let (resolver_config, resolver_opts) = if litep2p_config.use_system_dns_config { + hickory_resolver::system_conf::read_system_conf() + .map_err(Error::CannotReadSystemDnsConfig)? + } else { + (Default::default(), Default::default()) + }; + let resolver = Arc::new( + TokioResolver::builder_with_config(resolver_config, TokioConnectionProvider::default()) + .with_options(resolver_opts) + .build(), + ); + + let supported_transports = Self::supported_transports(&litep2p_config); + let mut transport_manager = TransportManagerBuilder::new() + .with_keypair(litep2p_config.keypair.clone()) + .with_supported_transports(supported_transports) + .with_bandwidth_sink(bandwidth_sink.clone()) + .with_connection_limits_config(litep2p_config.connection_limits) + .build(); + + let transport_handle = transport_manager.transport_manager_handle(); + // add known addresses to `TransportManager`, if any exist + if !litep2p_config.known_addresses.is_empty() { + for (peer, addresses) in litep2p_config.known_addresses { + transport_manager.add_known_address(peer, addresses.iter().cloned()); + } + } + + // start notification protocol event loops + for (protocol, config) in litep2p_config.notification_protocols.into_iter() { + tracing::debug!( + target: LOG_TARGET, + ?protocol, + "enable notification protocol", + ); + + let service = transport_manager.register_protocol( + protocol, + config.fallback_names.clone(), + config.codec, + litep2p_config.keep_alive_timeout, + SubstreamKeepAlive::Yes, + ); + let executor = Arc::clone(&litep2p_config.executor); + litep2p_config.executor.run(Box::pin(async move { + NotificationProtocol::new(service, config, executor).run().await + })); + } + + // start request-response protocol event loops + for (protocol, config) in litep2p_config.request_response_protocols.into_iter() { + tracing::debug!( + target: LOG_TARGET, + ?protocol, + "enable request-response protocol", + ); + + let service = transport_manager.register_protocol( + protocol, + config.fallback_names.clone(), + config.codec, + litep2p_config.keep_alive_timeout, + SubstreamKeepAlive::Yes, + ); + litep2p_config.executor.run(Box::pin(async move { + RequestResponseProtocol::new(service, config).run().await + })); + } + + // start user protocol event loops + for (protocol_name, protocol) in litep2p_config.user_protocols.into_iter() { + tracing::debug!(target: LOG_TARGET, protocol = ?protocol_name, "enable user protocol"); + + let service = transport_manager.register_protocol( + protocol_name, + Vec::new(), + protocol.codec(), + litep2p_config.keep_alive_timeout, + // TODO: make configurable by user. + SubstreamKeepAlive::Yes, + ); + litep2p_config.executor.run(Box::pin(async move { + let _ = protocol.run(service).await; + })); + } + + // start ping protocol event loop if enabled + if let Some(ping_config) = litep2p_config.ping.take() { + tracing::debug!( + target: LOG_TARGET, + protocol = ?ping_config.protocol, + "enable ipfs ping protocol", + ); + + let service = transport_manager.register_protocol( + ping_config.protocol.clone(), + Vec::new(), + ping_config.codec, + litep2p_config.keep_alive_timeout, + SubstreamKeepAlive::No, + ); + litep2p_config + .executor + .run(Box::pin(async move { Ping::new(service, ping_config).run().await })); + } + + // start kademlia protocol event loops + for kademlia_config in litep2p_config.kademlia.into_iter() { + tracing::debug!( + target: LOG_TARGET, + protocol_names = ?kademlia_config.protocol_names, + "enable ipfs kademlia protocol", + ); + + let main_protocol = + kademlia_config.protocol_names.first().expect("protocol name to exist"); + let fallback_names = kademlia_config.protocol_names.iter().skip(1).cloned().collect(); + + let service = transport_manager.register_protocol( + main_protocol.clone(), + fallback_names, + kademlia_config.codec, + litep2p_config.keep_alive_timeout, + SubstreamKeepAlive::Yes, + ); + litep2p_config.executor.run(Box::pin(async move { + let _ = Kademlia::new(service, kademlia_config).run().await; + })); + } + + // start identify protocol event loop if enabled + let mut identify_info = match litep2p_config.identify.take() { + None => None, + Some(mut identify_config) => { + tracing::debug!( + target: LOG_TARGET, + protocol = ?identify_config.protocol, + "enable ipfs identify protocol", + ); + + let service = transport_manager.register_protocol( + identify_config.protocol.clone(), + Vec::new(), + identify_config.codec, + litep2p_config.keep_alive_timeout, + SubstreamKeepAlive::No, + ); + identify_config.public = Some(litep2p_config.keypair.public().into()); + + Some((service, identify_config)) + }, + }; + + // start bitswap protocol event loop if enabled + if let Some(bitswap_config) = litep2p_config.bitswap.take() { + tracing::debug!( + target: LOG_TARGET, + protocol = ?bitswap_config.protocol, + "enable ipfs bitswap protocol", + ); + + let service = transport_manager.register_protocol( + bitswap_config.protocol.clone(), + Vec::new(), + bitswap_config.codec, + litep2p_config.keep_alive_timeout, + SubstreamKeepAlive::Yes, + ); + litep2p_config + .executor + .run(Box::pin(async move { Bitswap::new(service, bitswap_config).run().await })); + } + + // enable tcp transport if the config exists + if let Some(mut config) = litep2p_config.tcp.take() { + config.max_parallel_dials = litep2p_config.max_parallel_dials; + let handle = transport_manager.transport_handle(Arc::clone(&litep2p_config.executor)); + let (transport, transport_listen_addresses) = + ::new(handle, config, resolver.clone())?; + + for address in transport_listen_addresses { + transport_manager.register_listen_address(address.clone()); + listen_addresses.push(address.with(Protocol::P2p(*local_peer_id.as_ref()))); + } + + transport_manager.register_transport(SupportedTransport::Tcp, Box::new(transport)); + } + + // enable quic transport if the config exists + #[cfg(feature = "quic")] + if let Some(config) = litep2p_config.quic.take() { + let handle = transport_manager.transport_handle(Arc::clone(&litep2p_config.executor)); + let (transport, transport_listen_addresses) = + ::new(handle, config, resolver.clone())?; + + for address in transport_listen_addresses { + transport_manager.register_listen_address(address.clone()); + listen_addresses.push(address.with(Protocol::P2p(*local_peer_id.as_ref()))); + } + + transport_manager.register_transport(SupportedTransport::Quic, Box::new(transport)); + } + + // enable webrtc transport if the config exists + #[cfg(feature = "webrtc")] + if let Some(config) = litep2p_config.webrtc.take() { + let handle = transport_manager.transport_handle(Arc::clone(&litep2p_config.executor)); + let (transport, transport_listen_addresses) = + ::new(handle, config, resolver.clone())?; + + for address in transport_listen_addresses { + transport_manager.register_listen_address(address.clone()); + listen_addresses.push(address.with(Protocol::P2p(*local_peer_id.as_ref()))); + } + + transport_manager.register_transport(SupportedTransport::WebRtc, Box::new(transport)); + } + + // enable websocket transport if the config exists + #[cfg(feature = "websocket")] + if let Some(mut config) = litep2p_config.websocket.take() { + config.max_parallel_dials = litep2p_config.max_parallel_dials; + let handle = transport_manager.transport_handle(Arc::clone(&litep2p_config.executor)); + let (transport, transport_listen_addresses) = + ::new(handle, config, resolver)?; + + for address in transport_listen_addresses { + transport_manager.register_listen_address(address.clone()); + listen_addresses.push(address.with(Protocol::P2p(*local_peer_id.as_ref()))); + } + + transport_manager + .register_transport(SupportedTransport::WebSocket, Box::new(transport)); + } + + // enable mdns if the config exists + if let Some(config) = litep2p_config.mdns.take() { + let mdns = Mdns::new(transport_handle, config, listen_addresses.clone()); + + litep2p_config.executor.run(Box::pin(async move { + let _ = mdns.start().await; + })); + } + + // if identify was enabled, give it the enabled protocols and listen addresses and start it + if let Some((service, mut identify_config)) = identify_info.take() { + identify_config.protocols = transport_manager.protocols().cloned().collect(); + let identify = Identify::new(service, identify_config); + + litep2p_config.executor.run(Box::pin(async move { + let _ = identify.run().await; + })); + } + + if transport_manager.installed_transports().count() == 0 { + return Err(Error::Other("No transport specified".to_string())); + } + + // verify that at least one transport is specified + if listen_addresses.is_empty() { + tracing::warn!( + target: LOG_TARGET, + "litep2p started with no listen addresses, cannot accept inbound connections", + ); + } + + Ok(Self { local_peer_id, bandwidth_sink, listen_addresses, transport_manager }) + } + + /// Collect supported transports before initializing the transports themselves. + /// + /// Information of the supported transports is needed to initialize protocols but + /// information about protocols must be known to initialize transports so the initialization + /// has to be split. + fn supported_transports(config: &Litep2pConfig) -> HashSet { + let mut supported_transports = HashSet::new(); + + config + .tcp + .is_some() + .then(|| supported_transports.insert(SupportedTransport::Tcp)); + #[cfg(feature = "quic")] + config + .quic + .is_some() + .then(|| supported_transports.insert(SupportedTransport::Quic)); + #[cfg(feature = "websocket")] + config + .websocket + .is_some() + .then(|| supported_transports.insert(SupportedTransport::WebSocket)); + #[cfg(feature = "webrtc")] + config + .webrtc + .is_some() + .then(|| supported_transports.insert(SupportedTransport::WebRtc)); + + supported_transports + } + + /// Get local peer ID. + pub fn local_peer_id(&self) -> &PeerId { + &self.local_peer_id + } + + /// Get the list of public addresses of the node. + pub fn public_addresses(&self) -> PublicAddresses { + self.transport_manager.public_addresses() + } + + /// Get the list of listen addresses of the node. + pub fn listen_addresses(&self) -> impl Iterator { + self.listen_addresses.iter() + } + + /// Get handle to bandwidth sink. + pub fn bandwidth_sink(&self) -> BandwidthSink { + self.bandwidth_sink.clone() + } + + /// Dial peer. + pub async fn dial(&mut self, peer: &PeerId) -> crate::Result<()> { + self.transport_manager.dial(*peer).await + } + + /// Dial address. + pub async fn dial_address(&mut self, address: Multiaddr) -> crate::Result<()> { + self.transport_manager.dial_address(address).await + } + + /// Add one ore more known addresses for peer. + /// + /// Return value denotes how many addresses were added for the peer. + /// Addresses belonging to disabled/unsupported transports will be ignored. + pub fn add_known_address( + &mut self, + peer: PeerId, + address: impl Iterator, + ) -> usize { + self.transport_manager.add_known_address(peer, address) + } + + /// Poll next event. + /// + /// This function must be called in order for litep2p to make progress. + pub async fn next_event(&mut self) -> Option { + loop { + match self.transport_manager.next().await? { + TransportEvent::ConnectionEstablished { peer, endpoint, .. } => + return Some(Litep2pEvent::ConnectionEstablished { peer, endpoint }), + TransportEvent::ConnectionClosed { peer, connection_id } => + return Some(Litep2pEvent::ConnectionClosed { peer, connection_id }), + TransportEvent::DialFailure { address, error, .. } => + return Some(Litep2pEvent::DialFailure { address, error }), + + TransportEvent::OpenFailure { errors, .. } => { + return Some(Litep2pEvent::ListDialFailures { errors }); + }, + _ => {}, + } + } + } } #[cfg(test)] mod tests { - use crate::{ - config::ConfigBuilder, - protocol::{libp2p::ping, notification::Config as NotificationConfig}, - types::protocol::ProtocolName, - Litep2p, Litep2pEvent, PeerId, - }; - use multiaddr::{Multiaddr, Protocol}; - use multihash::Multihash; - use std::net::Ipv4Addr; - - #[tokio::test] - async fn initialize_litep2p() { - let _ = tracing_subscriber::fmt() - .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) - .try_init(); - - let (config1, _service1) = NotificationConfig::new( - ProtocolName::from("/notificaton/1"), - 1337usize, - vec![1, 2, 3, 4], - Vec::new(), - false, - 64, - 64, - true, - ); - let (config2, _service2) = NotificationConfig::new( - ProtocolName::from("/notificaton/2"), - 1337usize, - vec![1, 2, 3, 4], - Vec::new(), - false, - 64, - 64, - true, - ); - let (ping_config, _ping_event_stream) = ping::Config::default(); - - let config = ConfigBuilder::new() - .with_tcp(Default::default()) - .with_notification_protocol(config1) - .with_notification_protocol(config2) - .with_libp2p_ping(ping_config) - .build(); - - let _litep2p = Litep2p::new(config).unwrap(); - } - - #[tokio::test] - async fn no_transport_given() { - let _ = tracing_subscriber::fmt() - .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) - .try_init(); - - let (config1, _service1) = NotificationConfig::new( - ProtocolName::from("/notificaton/1"), - 1337usize, - vec![1, 2, 3, 4], - Vec::new(), - false, - 64, - 64, - true, - ); - let (config2, _service2) = NotificationConfig::new( - ProtocolName::from("/notificaton/2"), - 1337usize, - vec![1, 2, 3, 4], - Vec::new(), - false, - 64, - 64, - true, - ); - let (ping_config, _ping_event_stream) = ping::Config::default(); - - let config = ConfigBuilder::new() - .with_notification_protocol(config1) - .with_notification_protocol(config2) - .with_libp2p_ping(ping_config) - .build(); - - assert!(Litep2p::new(config).is_err()); - } - - #[tokio::test] - async fn dial_same_address_twice() { - let _ = tracing_subscriber::fmt() - .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) - .try_init(); - - let (config1, _service1) = NotificationConfig::new( - ProtocolName::from("/notificaton/1"), - 1337usize, - vec![1, 2, 3, 4], - Vec::new(), - false, - 64, - 64, - true, - ); - let (config2, _service2) = NotificationConfig::new( - ProtocolName::from("/notificaton/2"), - 1337usize, - vec![1, 2, 3, 4], - Vec::new(), - false, - 64, - 64, - true, - ); - let (ping_config, _ping_event_stream) = ping::Config::default(); - - let config = ConfigBuilder::new() - .with_tcp(Default::default()) - .with_notification_protocol(config1) - .with_notification_protocol(config2) - .with_libp2p_ping(ping_config) - .build(); - - let peer = PeerId::random(); - let address = Multiaddr::empty() - .with(Protocol::Ip4(Ipv4Addr::new(255, 254, 253, 252))) - .with(Protocol::Tcp(8888)) - .with(Protocol::P2p( - Multihash::from_bytes(&peer.to_bytes()).unwrap(), - )); - - let mut litep2p = Litep2p::new(config).unwrap(); - litep2p.dial_address(address.clone()).await.unwrap(); - litep2p.dial_address(address.clone()).await.unwrap(); - - match litep2p.next_event().await { - Some(Litep2pEvent::DialFailure { .. }) => {} - _ => panic!("invalid event received"), - } - - // verify that the second same dial was ignored and the dial failure is reported only once - match tokio::time::timeout(std::time::Duration::from_secs(20), litep2p.next_event()).await { - Err(_) => {} - _ => panic!("invalid event received"), - } - } + use crate::{ + config::ConfigBuilder, + protocol::{libp2p::ping, notification::Config as NotificationConfig}, + types::protocol::ProtocolName, + Litep2p, Litep2pEvent, PeerId, + }; + use multiaddr::{Multiaddr, Protocol}; + use multihash::Multihash; + use std::net::Ipv4Addr; + + #[tokio::test] + async fn initialize_litep2p() { + let _ = tracing_subscriber::fmt() + .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) + .try_init(); + + let (config1, _service1) = NotificationConfig::new( + ProtocolName::from("/notificaton/1"), + 1337usize, + vec![1, 2, 3, 4], + Vec::new(), + false, + 64, + 64, + true, + ); + let (config2, _service2) = NotificationConfig::new( + ProtocolName::from("/notificaton/2"), + 1337usize, + vec![1, 2, 3, 4], + Vec::new(), + false, + 64, + 64, + true, + ); + let (ping_config, _ping_event_stream) = ping::Config::default(); + + let config = ConfigBuilder::new() + .with_tcp(Default::default()) + .with_notification_protocol(config1) + .with_notification_protocol(config2) + .with_libp2p_ping(ping_config) + .build(); + + let _litep2p = Litep2p::new(config).unwrap(); + } + + #[tokio::test] + async fn no_transport_given() { + let _ = tracing_subscriber::fmt() + .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) + .try_init(); + + let (config1, _service1) = NotificationConfig::new( + ProtocolName::from("/notificaton/1"), + 1337usize, + vec![1, 2, 3, 4], + Vec::new(), + false, + 64, + 64, + true, + ); + let (config2, _service2) = NotificationConfig::new( + ProtocolName::from("/notificaton/2"), + 1337usize, + vec![1, 2, 3, 4], + Vec::new(), + false, + 64, + 64, + true, + ); + let (ping_config, _ping_event_stream) = ping::Config::default(); + + let config = ConfigBuilder::new() + .with_notification_protocol(config1) + .with_notification_protocol(config2) + .with_libp2p_ping(ping_config) + .build(); + + assert!(Litep2p::new(config).is_err()); + } + + #[tokio::test] + async fn dial_same_address_twice() { + let _ = tracing_subscriber::fmt() + .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) + .try_init(); + + let (config1, _service1) = NotificationConfig::new( + ProtocolName::from("/notificaton/1"), + 1337usize, + vec![1, 2, 3, 4], + Vec::new(), + false, + 64, + 64, + true, + ); + let (config2, _service2) = NotificationConfig::new( + ProtocolName::from("/notificaton/2"), + 1337usize, + vec![1, 2, 3, 4], + Vec::new(), + false, + 64, + 64, + true, + ); + let (ping_config, _ping_event_stream) = ping::Config::default(); + + let config = ConfigBuilder::new() + .with_tcp(Default::default()) + .with_notification_protocol(config1) + .with_notification_protocol(config2) + .with_libp2p_ping(ping_config) + .build(); + + let peer = PeerId::random(); + let address = Multiaddr::empty() + .with(Protocol::Ip4(Ipv4Addr::new(255, 254, 253, 252))) + .with(Protocol::Tcp(8888)) + .with(Protocol::P2p(Multihash::from_bytes(&peer.to_bytes()).unwrap())); + + let mut litep2p = Litep2p::new(config).unwrap(); + litep2p.dial_address(address.clone()).await.unwrap(); + litep2p.dial_address(address.clone()).await.unwrap(); + + match litep2p.next_event().await { + Some(Litep2pEvent::DialFailure { .. }) => {}, + _ => panic!("invalid event received"), + } + + // verify that the second same dial was ignored and the dial failure is reported only once + match tokio::time::timeout(std::time::Duration::from_secs(20), litep2p.next_event()).await { + Err(_) => {}, + _ => panic!("invalid event received"), + } + } } diff --git a/client/litep2p/src/mock/substream.rs b/client/litep2p/src/mock/substream.rs index 235548d3..0fac3384 100644 --- a/client/litep2p/src/mock/substream.rs +++ b/client/litep2p/src/mock/substream.rs @@ -24,67 +24,67 @@ use bytes::{Bytes, BytesMut}; use futures::{Sink, Stream}; use std::{ - fmt::Debug, - pin::Pin, - task::{Context, Poll}, + fmt::Debug, + pin::Pin, + task::{Context, Poll}, }; /// Trait which describes the behavior of a mock substream. pub trait Substream: - Debug - + Stream> - + Sink - + Send - + Unpin - + 'static + Debug + + Stream> + + Sink + + Send + + Unpin + + 'static { } /// Blanket implementation for [`Substream`]. impl< - T: Debug - + Stream> - + Sink - + Send - + Unpin - + 'static, - > Substream for T + T: Debug + + Stream> + + Sink + + Send + + Unpin + + 'static, + > Substream for T { } mockall::mock! { - #[derive(Debug)] - pub Substream {} - - impl Sink for Substream { - type Error = SubstreamError; - - fn poll_ready<'a>( - self: Pin<&mut Self>, - cx: &mut Context<'a> - ) -> Poll>; - - fn start_send(self: Pin<&mut Self>, item: bytes::Bytes) -> Result<(), SubstreamError>; - - fn poll_flush<'a>( - self: Pin<&mut Self>, - cx: &mut Context<'a> - ) -> Poll>; - - fn poll_close<'a>( - self: Pin<&mut Self>, - cx: &mut Context<'a> - ) -> Poll>; - } - - impl Stream for Substream { - type Item = Result; - - fn poll_next<'a>( - self: Pin<&mut Self>, - cx: &mut Context<'a> - ) -> Poll>>; - } + #[derive(Debug)] + pub Substream {} + + impl Sink for Substream { + type Error = SubstreamError; + + fn poll_ready<'a>( + self: Pin<&mut Self>, + cx: &mut Context<'a> + ) -> Poll>; + + fn start_send(self: Pin<&mut Self>, item: bytes::Bytes) -> Result<(), SubstreamError>; + + fn poll_flush<'a>( + self: Pin<&mut Self>, + cx: &mut Context<'a> + ) -> Poll>; + + fn poll_close<'a>( + self: Pin<&mut Self>, + cx: &mut Context<'a> + ) -> Poll>; + } + + impl Stream for Substream { + type Item = Result; + + fn poll_next<'a>( + self: Pin<&mut Self>, + cx: &mut Context<'a> + ) -> Poll>>; + } } /// Dummy substream which just implements `Stream + Sink` and returns `Poll::Pending`/`Ok(())` @@ -92,71 +92,71 @@ mockall::mock! { pub struct DummySubstream {} impl DummySubstream { - /// Create new [`DummySubstream`]. - #[cfg(test)] - pub fn new() -> Self { - Self {} - } + /// Create new [`DummySubstream`]. + #[cfg(test)] + pub fn new() -> Self { + Self {} + } } impl Sink for DummySubstream { - type Error = SubstreamError; + type Error = SubstreamError; - fn poll_ready(self: Pin<&mut Self>, _cx: &mut Context<'_>) -> Poll> { - Poll::Pending - } + fn poll_ready(self: Pin<&mut Self>, _cx: &mut Context<'_>) -> Poll> { + Poll::Pending + } - fn start_send(self: Pin<&mut Self>, _item: bytes::Bytes) -> Result<(), SubstreamError> { - Ok(()) - } + fn start_send(self: Pin<&mut Self>, _item: bytes::Bytes) -> Result<(), SubstreamError> { + Ok(()) + } - fn poll_flush(self: Pin<&mut Self>, _cx: &mut Context<'_>) -> Poll> { - Poll::Pending - } + fn poll_flush(self: Pin<&mut Self>, _cx: &mut Context<'_>) -> Poll> { + Poll::Pending + } - fn poll_close(self: Pin<&mut Self>, _cx: &mut Context<'_>) -> Poll> { - Poll::Ready(Ok(())) - } + fn poll_close(self: Pin<&mut Self>, _cx: &mut Context<'_>) -> Poll> { + Poll::Ready(Ok(())) + } } impl Stream for DummySubstream { - type Item = Result; - - fn poll_next( - self: Pin<&mut Self>, - _cx: &mut Context<'_>, - ) -> Poll>> { - Poll::Pending - } + type Item = Result; + + fn poll_next( + self: Pin<&mut Self>, + _cx: &mut Context<'_>, + ) -> Poll>> { + Poll::Pending + } } #[cfg(test)] mod tests { - use super::*; - use futures::SinkExt; - - #[tokio::test] - async fn dummy_substream_sink() { - let mut substream = DummySubstream::new(); - - futures::future::poll_fn(|cx| match substream.poll_ready_unpin(cx) { - Poll::Pending => Poll::Ready(()), - _ => panic!("invalid event"), - }) - .await; - - assert!(Pin::new(&mut substream).start_send(bytes::Bytes::new()).is_ok()); - - futures::future::poll_fn(|cx| match substream.poll_flush_unpin(cx) { - Poll::Pending => Poll::Ready(()), - _ => panic!("invalid event"), - }) - .await; - - futures::future::poll_fn(|cx| match substream.poll_close_unpin(cx) { - Poll::Ready(Ok(())) => Poll::Ready(()), - _ => panic!("invalid event"), - }) - .await; - } + use super::*; + use futures::SinkExt; + + #[tokio::test] + async fn dummy_substream_sink() { + let mut substream = DummySubstream::new(); + + futures::future::poll_fn(|cx| match substream.poll_ready_unpin(cx) { + Poll::Pending => Poll::Ready(()), + _ => panic!("invalid event"), + }) + .await; + + assert!(Pin::new(&mut substream).start_send(bytes::Bytes::new()).is_ok()); + + futures::future::poll_fn(|cx| match substream.poll_flush_unpin(cx) { + Poll::Pending => Poll::Ready(()), + _ => panic!("invalid event"), + }) + .await; + + futures::future::poll_fn(|cx| match substream.poll_close_unpin(cx) { + Poll::Ready(Ok(())) => Poll::Ready(()), + _ => panic!("invalid event"), + }) + .await; + } } diff --git a/client/litep2p/src/multistream_select/dialer_select.rs b/client/litep2p/src/multistream_select/dialer_select.rs index 86c22647..ae733a5b 100644 --- a/client/litep2p/src/multistream_select/dialer_select.rs +++ b/client/litep2p/src/multistream_select/dialer_select.rs @@ -21,26 +21,26 @@ //! Protocol negotiation strategies for the peer acting as the dialer. use crate::{ - codec::unsigned_varint::UnsignedVarint, - error::{self, Error, ParseError, SubstreamError}, - multistream_select::{ - drain_trailing_protocols, - protocol::{ - webrtc_encode_multistream_message, HeaderLine, Message, MessageIO, Protocol, - ProtocolError, PROTO_MULTISTREAM_1_0, - }, - Negotiated, NegotiationError, Version, - }, - types::protocol::ProtocolName, + codec::unsigned_varint::UnsignedVarint, + error::{self, Error, ParseError, SubstreamError}, + multistream_select::{ + drain_trailing_protocols, + protocol::{ + webrtc_encode_multistream_message, HeaderLine, Message, MessageIO, Protocol, + ProtocolError, PROTO_MULTISTREAM_1_0, + }, + Negotiated, NegotiationError, Version, + }, + types::protocol::ProtocolName, }; use bytes::{Bytes, BytesMut}; use futures::prelude::*; use std::{ - convert::TryFrom as _, - iter, mem, - pin::Pin, - task::{Context, Poll}, + convert::TryFrom as _, + iter, mem, + pin::Pin, + task::{Context, Poll}, }; const LOG_TARGET: &str = "litep2p::multistream-select"; @@ -59,861 +59,792 @@ const LOG_TARGET: &str = "litep2p::multistream-select"; /// protocol upgrades may thus proceed by deployments with updated listeners, /// eventually followed by deployments of dialers choosing the newer protocol. pub fn dialer_select_proto( - inner: R, - protocols: I, - version: Version, + inner: R, + protocols: I, + version: Version, ) -> DialerSelectFuture where - R: AsyncRead + AsyncWrite, - I: IntoIterator, - I::Item: AsRef<[u8]>, + R: AsyncRead + AsyncWrite, + I: IntoIterator, + I::Item: AsRef<[u8]>, { - let protocols = protocols.into_iter().peekable(); - DialerSelectFuture { - version, - protocols, - state: State::SendHeader { - io: MessageIO::new(inner), - }, - } + let protocols = protocols.into_iter().peekable(); + DialerSelectFuture { + version, + protocols, + state: State::SendHeader { io: MessageIO::new(inner) }, + } } /// A `Future` returned by [`dialer_select_proto`] which negotiates /// a protocol iteratively by considering one protocol after the other. #[pin_project::pin_project] pub struct DialerSelectFuture { - protocols: iter::Peekable, - state: State, - version: Version, + protocols: iter::Peekable, + state: State, + version: Version, } enum State { - SendHeader { - io: MessageIO, - }, - SendProtocol { - io: MessageIO, - protocol: N, - header_received: bool, - }, - FlushProtocol { - io: MessageIO, - protocol: N, - header_received: bool, - }, - AwaitProtocol { - io: MessageIO, - protocol: N, - header_received: bool, - }, - Done, + SendHeader { io: MessageIO }, + SendProtocol { io: MessageIO, protocol: N, header_received: bool }, + FlushProtocol { io: MessageIO, protocol: N, header_received: bool }, + AwaitProtocol { io: MessageIO, protocol: N, header_received: bool }, + Done, } impl Future for DialerSelectFuture where - // The Unpin bound here is required because we produce - // a `Negotiated` as the output. It also makes - // the implementation considerably easier to write. - R: AsyncRead + AsyncWrite + Unpin, - I: Iterator, - I::Item: AsRef<[u8]>, + // The Unpin bound here is required because we produce + // a `Negotiated` as the output. It also makes + // the implementation considerably easier to write. + R: AsyncRead + AsyncWrite + Unpin, + I: Iterator, + I::Item: AsRef<[u8]>, { - type Output = Result<(I::Item, Negotiated), NegotiationError>; - - fn poll(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll { - let this = self.project(); - - loop { - match mem::replace(this.state, State::Done) { - State::SendHeader { mut io } => { - match Pin::new(&mut io).poll_ready(cx)? { - Poll::Ready(()) => {} - Poll::Pending => { - *this.state = State::SendHeader { io }; - return Poll::Pending; - } - } - - let h = HeaderLine::from(*this.version); - if let Err(err) = Pin::new(&mut io).start_send(Message::Header(h)) { - return Poll::Ready(Err(From::from(err))); - } - - let protocol = this.protocols.next().ok_or(NegotiationError::Failed)?; - - // The dialer always sends the header and the first protocol - // proposal in one go for efficiency. - *this.state = State::SendProtocol { - io, - protocol, - header_received: false, - }; - } - - State::SendProtocol { - mut io, - protocol, - header_received, - } => { - match Pin::new(&mut io).poll_ready(cx)? { - Poll::Ready(()) => {} - Poll::Pending => { - *this.state = State::SendProtocol { - io, - protocol, - header_received, - }; - return Poll::Pending; - } - } - - let p = Protocol::try_from(protocol.as_ref())?; - if let Err(err) = Pin::new(&mut io).start_send(Message::Protocol(p.clone())) { - return Poll::Ready(Err(From::from(err))); - } - tracing::debug!(target: LOG_TARGET, "Dialer: Proposed protocol: {}", p); - - if this.protocols.peek().is_some() { - *this.state = State::FlushProtocol { - io, - protocol, - header_received, - } - } else { - match this.version { - Version::V1 => - *this.state = State::FlushProtocol { - io, - protocol, - header_received, - }, - // This is the only effect that `V1Lazy` has compared to `V1`: - // Optimistically settling on the only protocol that - // the dialer supports for this negotiation. Notably, - // the dialer expects a regular `V1` response. - Version::V1Lazy => { - tracing::debug!( - target: LOG_TARGET, - "Dialer: Expecting proposed protocol: {}", - p - ); - let hl = HeaderLine::from(Version::V1Lazy); - let io = Negotiated::expecting(io.into_reader(), p, Some(hl)); - return Poll::Ready(Ok((protocol, io))); - } - } - } - } - - State::FlushProtocol { - mut io, - protocol, - header_received, - } => match Pin::new(&mut io).poll_flush(cx)? { - Poll::Ready(()) => - *this.state = State::AwaitProtocol { - io, - protocol, - header_received, - }, - Poll::Pending => { - *this.state = State::FlushProtocol { - io, - protocol, - header_received, - }; - return Poll::Pending; - } - }, - - State::AwaitProtocol { - mut io, - protocol, - header_received, - } => { - let msg = match Pin::new(&mut io).poll_next(cx)? { - Poll::Ready(Some(msg)) => msg, - Poll::Pending => { - *this.state = State::AwaitProtocol { - io, - protocol, - header_received, - }; - return Poll::Pending; - } - // Treat EOF error as [`NegotiationError::Failed`], not as - // [`NegotiationError::ProtocolError`], allowing dropping or closing an I/O - // stream as a permissible way to "gracefully" fail a negotiation. - Poll::Ready(None) => return Poll::Ready(Err(NegotiationError::Failed)), - }; - - match msg { - Message::Header(v) - if v == HeaderLine::from(*this.version) && !header_received => - { - *this.state = State::AwaitProtocol { - io, - protocol, - header_received: true, - }; - } - Message::Protocol(ref p) if p.as_ref() == protocol.as_ref() => { - tracing::debug!( - target: LOG_TARGET, - "Dialer: Received confirmation for protocol: {}", - p - ); - let io = Negotiated::completed(io.into_inner()); - return Poll::Ready(Ok((protocol, io))); - } - Message::NotAvailable => { - tracing::debug!( - target: LOG_TARGET, - "Dialer: Received rejection of protocol: {}", - String::from_utf8_lossy(protocol.as_ref()) - ); - let protocol = this.protocols.next().ok_or(NegotiationError::Failed)?; - *this.state = State::SendProtocol { - io, - protocol, - header_received, - } - } - _ => return Poll::Ready(Err(ProtocolError::InvalidMessage.into())), - } - } - - State::Done => panic!("State::poll called after completion"), - } - } - } + type Output = Result<(I::Item, Negotiated), NegotiationError>; + + fn poll(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll { + let this = self.project(); + + loop { + match mem::replace(this.state, State::Done) { + State::SendHeader { mut io } => { + match Pin::new(&mut io).poll_ready(cx)? { + Poll::Ready(()) => {}, + Poll::Pending => { + *this.state = State::SendHeader { io }; + return Poll::Pending; + }, + } + + let h = HeaderLine::from(*this.version); + if let Err(err) = Pin::new(&mut io).start_send(Message::Header(h)) { + return Poll::Ready(Err(From::from(err))); + } + + let protocol = this.protocols.next().ok_or(NegotiationError::Failed)?; + + // The dialer always sends the header and the first protocol + // proposal in one go for efficiency. + *this.state = State::SendProtocol { io, protocol, header_received: false }; + }, + + State::SendProtocol { mut io, protocol, header_received } => { + match Pin::new(&mut io).poll_ready(cx)? { + Poll::Ready(()) => {}, + Poll::Pending => { + *this.state = State::SendProtocol { io, protocol, header_received }; + return Poll::Pending; + }, + } + + let p = Protocol::try_from(protocol.as_ref())?; + if let Err(err) = Pin::new(&mut io).start_send(Message::Protocol(p.clone())) { + return Poll::Ready(Err(From::from(err))); + } + tracing::debug!(target: LOG_TARGET, "Dialer: Proposed protocol: {}", p); + + if this.protocols.peek().is_some() { + *this.state = State::FlushProtocol { io, protocol, header_received } + } else { + match this.version { + Version::V1 => + *this.state = State::FlushProtocol { io, protocol, header_received }, + // This is the only effect that `V1Lazy` has compared to `V1`: + // Optimistically settling on the only protocol that + // the dialer supports for this negotiation. Notably, + // the dialer expects a regular `V1` response. + Version::V1Lazy => { + tracing::debug!( + target: LOG_TARGET, + "Dialer: Expecting proposed protocol: {}", + p + ); + let hl = HeaderLine::from(Version::V1Lazy); + let io = Negotiated::expecting(io.into_reader(), p, Some(hl)); + return Poll::Ready(Ok((protocol, io))); + }, + } + } + }, + + State::FlushProtocol { mut io, protocol, header_received } => + match Pin::new(&mut io).poll_flush(cx)? { + Poll::Ready(()) => + *this.state = State::AwaitProtocol { io, protocol, header_received }, + Poll::Pending => { + *this.state = State::FlushProtocol { io, protocol, header_received }; + return Poll::Pending; + }, + }, + + State::AwaitProtocol { mut io, protocol, header_received } => { + let msg = match Pin::new(&mut io).poll_next(cx)? { + Poll::Ready(Some(msg)) => msg, + Poll::Pending => { + *this.state = State::AwaitProtocol { io, protocol, header_received }; + return Poll::Pending; + }, + // Treat EOF error as [`NegotiationError::Failed`], not as + // [`NegotiationError::ProtocolError`], allowing dropping or closing an I/O + // stream as a permissible way to "gracefully" fail a negotiation. + Poll::Ready(None) => return Poll::Ready(Err(NegotiationError::Failed)), + }; + + match msg { + Message::Header(v) + if v == HeaderLine::from(*this.version) && !header_received => + { + *this.state = + State::AwaitProtocol { io, protocol, header_received: true }; + }, + Message::Protocol(ref p) if p.as_ref() == protocol.as_ref() => { + tracing::debug!( + target: LOG_TARGET, + "Dialer: Received confirmation for protocol: {}", + p + ); + let io = Negotiated::completed(io.into_inner()); + return Poll::Ready(Ok((protocol, io))); + }, + Message::NotAvailable => { + tracing::debug!( + target: LOG_TARGET, + "Dialer: Received rejection of protocol: {}", + String::from_utf8_lossy(protocol.as_ref()) + ); + let protocol = this.protocols.next().ok_or(NegotiationError::Failed)?; + *this.state = State::SendProtocol { io, protocol, header_received } + }, + _ => return Poll::Ready(Err(ProtocolError::InvalidMessage.into())), + } + }, + + State::Done => panic!("State::poll called after completion"), + } + } + } } /// `multistream-select` handshake result for dialer. #[derive(Debug, PartialEq, Eq)] pub enum HandshakeResult { - /// Handshake is not complete, data missing. - NotReady, - - /// Handshake has succeeded. - /// - /// The returned tuple contains the negotiated protocol and response - /// that must be sent to remote peer. - Succeeded(ProtocolName), + /// Handshake is not complete, data missing. + NotReady, + + /// Handshake has succeeded. + /// + /// The returned tuple contains the negotiated protocol and response + /// that must be sent to remote peer. + Succeeded(ProtocolName), } /// Handshake state. #[derive(Debug)] enum HandshakeState { - /// Waiting to receive any response from remote peer. - WaitingResponse, + /// Waiting to receive any response from remote peer. + WaitingResponse, - /// Waiting to receive the actual application protocol from remote peer. - WaitingProtocol, + /// Waiting to receive the actual application protocol from remote peer. + WaitingProtocol, } /// `multistream-select` dialer handshake state. #[derive(Debug)] pub struct WebRtcDialerState { - /// Proposed main protocol. - protocol: ProtocolName, + /// Proposed main protocol. + protocol: ProtocolName, - /// Fallback names of the main protocol. - fallback_names: Vec, + /// Fallback names of the main protocol. + fallback_names: Vec, - /// Dialer handshake state. - state: HandshakeState, + /// Dialer handshake state. + state: HandshakeState, } impl WebRtcDialerState { - /// Propose protocol to remote peer. - /// - /// Return [`WebRtcDialerState`] which is used to drive forward the negotiation and an encoded - /// `multistream-select` message that contains the protocol proposal for the substream. - pub fn propose( - protocol: ProtocolName, - fallback_names: Vec, - ) -> crate::Result<(Self, Vec)> { - let message = webrtc_encode_multistream_message( - std::iter::once(protocol.clone()) - .chain(fallback_names.clone()) - .filter_map(|protocol| Protocol::try_from(protocol.as_ref()).ok()) - .map(Message::Protocol), - )? - .freeze() - .to_vec(); - - Ok(( - Self { - protocol, - fallback_names, - state: HandshakeState::WaitingResponse, - }, - message, - )) - } - - /// Register response to [`WebRtcDialerState`]. - pub fn register_response( - &mut self, - payload: Vec, - ) -> Result { - // All multistream-select messages are length-prefixed. Since this code path is not using - // multistream_select::protocol::MessageIO, we need to decode and remove the length here. - let remaining: &[u8] = &payload; - let (len, tail) = unsigned_varint::decode::usize(remaining).map_err(|error| { - tracing::debug!( + /// Propose protocol to remote peer. + /// + /// Return [`WebRtcDialerState`] which is used to drive forward the negotiation and an encoded + /// `multistream-select` message that contains the protocol proposal for the substream. + pub fn propose( + protocol: ProtocolName, + fallback_names: Vec, + ) -> crate::Result<(Self, Vec)> { + let message = webrtc_encode_multistream_message( + std::iter::once(protocol.clone()) + .chain(fallback_names.clone()) + .filter_map(|protocol| Protocol::try_from(protocol.as_ref()).ok()) + .map(Message::Protocol), + )? + .freeze() + .to_vec(); + + Ok((Self { protocol, fallback_names, state: HandshakeState::WaitingResponse }, message)) + } + + /// Register response to [`WebRtcDialerState`]. + pub fn register_response( + &mut self, + payload: Vec, + ) -> Result { + // All multistream-select messages are length-prefixed. Since this code path is not using + // multistream_select::protocol::MessageIO, we need to decode and remove the length here. + let remaining: &[u8] = &payload; + let (len, tail) = unsigned_varint::decode::usize(remaining).map_err(|error| { + tracing::debug!( target: LOG_TARGET, ?error, message = ?payload, "Failed to decode length-prefix in multistream message"); - error::NegotiationError::ParseError(ParseError::InvalidData) - })?; - - let len_size = remaining.len() - tail.len(); - let bytes = Bytes::from(payload); - let payload = bytes.slice(len_size..len_size + len); - let remaining = bytes.slice(len_size + len..); - let message = Message::decode(payload); - - tracing::trace!( - target: LOG_TARGET, - ?message, - "Decoded message while registering response", - ); - - let mut protocols = match message { - Ok(Message::Header(HeaderLine::V1)) => { - vec![PROTO_MULTISTREAM_1_0] - } - Ok(Message::Protocol(protocol)) => vec![protocol], - Ok(Message::Protocols(protocols)) => protocols, - Ok(Message::NotAvailable) => - return match &self.state { - HandshakeState::WaitingProtocol => Err( - error::NegotiationError::MultistreamSelectError(NegotiationError::Failed), - ), - _ => Err(error::NegotiationError::StateMismatch), - }, - Ok(Message::ListProtocols) => return Err(error::NegotiationError::StateMismatch), - Err(_) => return Err(error::NegotiationError::ParseError(ParseError::InvalidData)), - }; - - match drain_trailing_protocols(remaining) { - Ok(protos) => protocols.extend(protos), - Err(error) => return Err(error), - } - - let mut protocol_iter = protocols.into_iter(); - loop { - match (&self.state, protocol_iter.next()) { - (HandshakeState::WaitingResponse, None) => - return Err(crate::error::NegotiationError::StateMismatch), - (HandshakeState::WaitingResponse, Some(protocol)) => { - if protocol == PROTO_MULTISTREAM_1_0 { - self.state = HandshakeState::WaitingProtocol; - } else { - return Err(crate::error::NegotiationError::MultistreamSelectError( - NegotiationError::Failed, - )); - } - } - (HandshakeState::WaitingProtocol, Some(protocol)) => { - if protocol == PROTO_MULTISTREAM_1_0 { - return Err(crate::error::NegotiationError::StateMismatch); - } - - if self.protocol.as_bytes() == protocol.as_ref() { - return Ok(HandshakeResult::Succeeded(self.protocol.clone())); - } - - for fallback in &self.fallback_names { - if fallback.as_bytes() == protocol.as_ref() { - return Ok(HandshakeResult::Succeeded(fallback.clone())); - } - } - - return Err(crate::error::NegotiationError::MultistreamSelectError( - NegotiationError::Failed, - )); - } - (HandshakeState::WaitingProtocol, None) => { - return Ok(HandshakeResult::NotReady); - } - } - } - } + error::NegotiationError::ParseError(ParseError::InvalidData) + })?; + + let len_size = remaining.len() - tail.len(); + let bytes = Bytes::from(payload); + let payload = bytes.slice(len_size..len_size + len); + let remaining = bytes.slice(len_size + len..); + let message = Message::decode(payload); + + tracing::trace!( + target: LOG_TARGET, + ?message, + "Decoded message while registering response", + ); + + let mut protocols = match message { + Ok(Message::Header(HeaderLine::V1)) => { + vec![PROTO_MULTISTREAM_1_0] + }, + Ok(Message::Protocol(protocol)) => vec![protocol], + Ok(Message::Protocols(protocols)) => protocols, + Ok(Message::NotAvailable) => + return match &self.state { + HandshakeState::WaitingProtocol => Err( + error::NegotiationError::MultistreamSelectError(NegotiationError::Failed), + ), + _ => Err(error::NegotiationError::StateMismatch), + }, + Ok(Message::ListProtocols) => return Err(error::NegotiationError::StateMismatch), + Err(_) => return Err(error::NegotiationError::ParseError(ParseError::InvalidData)), + }; + + match drain_trailing_protocols(remaining) { + Ok(protos) => protocols.extend(protos), + Err(error) => return Err(error), + } + + let mut protocol_iter = protocols.into_iter(); + loop { + match (&self.state, protocol_iter.next()) { + (HandshakeState::WaitingResponse, None) => + return Err(crate::error::NegotiationError::StateMismatch), + (HandshakeState::WaitingResponse, Some(protocol)) => { + if protocol == PROTO_MULTISTREAM_1_0 { + self.state = HandshakeState::WaitingProtocol; + } else { + return Err(crate::error::NegotiationError::MultistreamSelectError( + NegotiationError::Failed, + )); + } + }, + (HandshakeState::WaitingProtocol, Some(protocol)) => { + if protocol == PROTO_MULTISTREAM_1_0 { + return Err(crate::error::NegotiationError::StateMismatch); + } + + if self.protocol.as_bytes() == protocol.as_ref() { + return Ok(HandshakeResult::Succeeded(self.protocol.clone())); + } + + for fallback in &self.fallback_names { + if fallback.as_bytes() == protocol.as_ref() { + return Ok(HandshakeResult::Succeeded(fallback.clone())); + } + } + + return Err(crate::error::NegotiationError::MultistreamSelectError( + NegotiationError::Failed, + )); + }, + (HandshakeState::WaitingProtocol, None) => { + return Ok(HandshakeResult::NotReady); + }, + } + } + } } #[cfg(test)] mod tests { - use super::*; - use crate::multistream_select::{listener_select_proto, protocol::MSG_MULTISTREAM_1_0}; - use bytes::BufMut; - use std::time::Duration; - #[tokio::test] - async fn select_proto_basic() { - async fn run(version: Version) { - let (client_connection, server_connection) = futures_ringbuf::Endpoint::pair(100, 100); - - let server: tokio::task::JoinHandle> = tokio::spawn(async move { - let protos = vec!["/proto1", "/proto2"]; - let (proto, mut io) = - listener_select_proto(server_connection, protos).await.unwrap(); - assert_eq!(proto, "/proto2"); - - let mut out = vec![0; 32]; - let n = io.read(&mut out).await.unwrap(); - out.truncate(n); - assert_eq!(out, b"ping"); - - io.write_all(b"pong").await.unwrap(); - io.flush().await.unwrap(); - - Ok(()) - }); - - let client: tokio::task::JoinHandle> = tokio::spawn(async move { - let protos = vec!["/proto3", "/proto2"]; - let (proto, mut io) = - dialer_select_proto(client_connection, protos, version).await.unwrap(); - assert_eq!(proto, "/proto2"); - - io.write_all(b"ping").await.unwrap(); - io.flush().await.unwrap(); - - let mut out = vec![0; 32]; - let n = io.read(&mut out).await.unwrap(); - out.truncate(n); - assert_eq!(out, b"pong"); - - Ok(()) - }); - - server.await.unwrap(); - client.await.unwrap(); - } - - run(Version::V1).await; - run(Version::V1Lazy).await; - } - - /// Tests the expected behaviour of failed negotiations. - #[tokio::test] - async fn negotiation_failed() { - async fn run( - version: Version, - dial_protos: Vec<&'static str>, - dial_payload: Vec, - listen_protos: Vec<&'static str>, - ) { - let (client_connection, server_connection) = futures_ringbuf::Endpoint::pair(100, 100); - - let server: tokio::task::JoinHandle> = tokio::spawn(async move { - let io = match tokio::time::timeout( - Duration::from_secs(2), - listener_select_proto(server_connection, listen_protos), - ) - .await - .unwrap() - { - Ok((_, io)) => io, - Err(NegotiationError::Failed) => return Ok(()), - Err(NegotiationError::ProtocolError(e)) => { - panic!("Unexpected protocol error {e}") - } - }; - match io.complete().await { - Err(NegotiationError::Failed) => {} - _ => panic!(), - } - - Ok(()) - }); - - let client: tokio::task::JoinHandle> = tokio::spawn(async move { - let mut io = match tokio::time::timeout( - Duration::from_secs(2), - dialer_select_proto(client_connection, dial_protos, version), - ) - .await - .unwrap() - { - Err(NegotiationError::Failed) => return Ok(()), - Ok((_, io)) => io, - Err(_) => panic!(), - }; - - // The dialer may write a payload that is even sent before it - // got confirmation of the last proposed protocol, when `V1Lazy` - // is used. - io.write_all(&dial_payload).await.unwrap(); - match io.complete().await { - Err(NegotiationError::Failed) => {} - _ => panic!(), - } - - Ok(()) - }); - - server.await.unwrap(); - client.await.unwrap(); - } - - // Incompatible protocols. - run(Version::V1, vec!["/proto1"], vec![1], vec!["/proto2"]).await; - run(Version::V1Lazy, vec!["/proto1"], vec![1], vec!["/proto2"]).await; - } - - #[tokio::test] - async fn v1_lazy_do_not_wait_for_negotiation_on_poll_close() { - let (client_connection, _server_connection) = - futures_ringbuf::Endpoint::pair(1024 * 1024, 1); - - let client = tokio::spawn(async move { - // Single protocol to allow for lazy (or optimistic) protocol negotiation. - let protos = vec!["/proto1"]; - let (proto, mut io) = - dialer_select_proto(client_connection, protos, Version::V1Lazy).await.unwrap(); - assert_eq!(proto, "/proto1"); - - // In Libp2p the lazy negotation of protocols can be closed at any time, - // even if the negotiation is not yet done. - - // However, for the Litep2p the negotation must conclude before closing the - // lazy negotation of protocol. We'll wait for the close until the - // server has produced a message, in this test that means forever. - io.close().await.unwrap(); - }); - - assert!(tokio::time::timeout(Duration::from_secs(10), client).await.is_ok()); - } - - #[tokio::test] - async fn low_level_negotiate() { - async fn run(version: Version) { - let (client_connection, mut server_connection) = - futures_ringbuf::Endpoint::pair(100, 100); - - let server = tokio::spawn(async move { - let protos = ["/proto2"]; - - let multistream = b"/multistream/1.0.0\n"; - let len = multistream.len(); - let proto = b"/proto2\n"; - let proto_len = proto.len(); - - // Check that our implementation writes optimally - // the multistream ++ protocol in a single message. - let mut expected_message = Vec::new(); - expected_message.push(len as u8); - expected_message.extend_from_slice(multistream); - expected_message.push(proto_len as u8); - expected_message.extend_from_slice(proto); - - if version == Version::V1Lazy { - expected_message.extend_from_slice(b"ping"); - } - - let mut out = vec![0; 64]; - let n = server_connection.read(&mut out).await.unwrap(); - out.truncate(n); - assert_eq!(out, expected_message); - - // We must send the back the multistream packet. - let mut send_message = Vec::new(); - send_message.push(len as u8); - send_message.extend_from_slice(multistream); - - server_connection.write_all(&mut send_message).await.unwrap(); - - let mut send_message = Vec::new(); - send_message.push(proto_len as u8); - send_message.extend_from_slice(proto); - server_connection.write_all(&mut send_message).await.unwrap(); - - // Handle handshake. - match version { - Version::V1 => { - let mut out = vec![0; 64]; - let n = server_connection.read(&mut out).await.unwrap(); - out.truncate(n); - assert_eq!(out, b"ping"); - - server_connection.write_all(b"pong").await.unwrap(); - } - Version::V1Lazy => { - // Ping (handshake) payload expected in the initial message. - server_connection.write_all(b"pong").await.unwrap(); - } - } - }); - - let client = tokio::spawn(async move { - let protos = vec!["/proto2"]; - let (proto, mut io) = - dialer_select_proto(client_connection, protos, version).await.unwrap(); - assert_eq!(proto, "/proto2"); - - io.write_all(b"ping").await.unwrap(); - io.flush().await.unwrap(); - - let mut out = vec![0; 32]; - let n = io.read(&mut out).await.unwrap(); - out.truncate(n); - assert_eq!(out, b"pong"); - }); - - server.await.unwrap(); - client.await.unwrap(); - } - - run(Version::V1).await; - run(Version::V1Lazy).await; - } - - #[tokio::test] - async fn v1_low_level_negotiate_multiple_headers() { - let (client_connection, mut server_connection) = futures_ringbuf::Endpoint::pair(100, 100); - - let server = tokio::spawn(async move { - let protos = ["/proto2"]; - - let multistream = b"/multistream/1.0.0\n"; - let len = multistream.len(); - let proto = b"/proto2\n"; - let proto_len = proto.len(); - - // Check that our implementation writes optimally - // the multistream ++ protocol in a single message. - let mut expected_message = Vec::new(); - expected_message.push(len as u8); - expected_message.extend_from_slice(multistream); - expected_message.push(proto_len as u8); - expected_message.extend_from_slice(proto); - - let mut out = vec![0; 64]; - let n = server_connection.read(&mut out).await.unwrap(); - out.truncate(n); - assert_eq!(out, expected_message); - - // We must send the back the multistream packet. - let mut send_message = Vec::new(); - send_message.push(len as u8); - send_message.extend_from_slice(multistream); - - server_connection.write_all(&mut send_message).await.unwrap(); - - // We must send the back the multistream packet again. - let mut send_message = Vec::new(); - send_message.push(len as u8); - send_message.extend_from_slice(multistream); - - server_connection.write_all(&mut send_message).await.unwrap(); - }); - - let client = tokio::spawn(async move { - let protos = vec!["/proto2"]; - - // Negotiation fails because the protocol receives the `/multistream/1.0.0` header - // multiple times. - let result = - dialer_select_proto(client_connection, protos, Version::V1).await.unwrap_err(); - match result { - NegotiationError::ProtocolError(ProtocolError::InvalidMessage) => {} - _ => panic!("unexpected error: {:?}", result), - }; - }); - - server.await.unwrap(); - client.await.unwrap(); - } - - #[tokio::test] - async fn v1_lazy_low_level_negotiate_multiple_headers() { - let (client_connection, mut server_connection) = futures_ringbuf::Endpoint::pair(100, 100); - - let server = tokio::spawn(async move { - let protos = ["/proto2"]; - - let multistream = b"/multistream/1.0.0\n"; - let len = multistream.len(); - let proto = b"/proto2\n"; - let proto_len = proto.len(); - - // Check that our implementation writes optimally - // the multistream ++ protocol in a single message. - let mut expected_message = Vec::new(); - expected_message.push(len as u8); - expected_message.extend_from_slice(multistream); - expected_message.push(proto_len as u8); - expected_message.extend_from_slice(proto); - - let mut out = vec![0; 64]; - let n = server_connection.read(&mut out).await.unwrap(); - out.truncate(n); - assert_eq!(out, expected_message); - - // We must send the back the multistream packet. - let mut send_message = Vec::new(); - send_message.push(len as u8); - send_message.extend_from_slice(multistream); - - server_connection.write_all(&mut send_message).await.unwrap(); - - // We must send the back the multistream packet again. - let mut send_message = Vec::new(); - send_message.push(len as u8); - send_message.extend_from_slice(multistream); - - server_connection.write_all(&mut send_message).await.unwrap(); - }); - - let client = tokio::spawn(async move { - let protos = vec!["/proto2"]; - - // Negotiation fails because the protocol receives the `/multistream/1.0.0` header - // multiple times. - let (proto, to_negociate) = - dialer_select_proto(client_connection, protos, Version::V1Lazy).await.unwrap(); - assert_eq!(proto, "/proto2"); - - let result = to_negociate.complete().await.unwrap_err(); - - match result { - NegotiationError::ProtocolError(ProtocolError::InvalidMessage) => {} - _ => panic!("unexpected error: {:?}", result), - }; - }); - - server.await.unwrap(); - client.await.unwrap(); - } - - #[test] - fn propose() { - let (mut dialer_state, message) = - WebRtcDialerState::propose(ProtocolName::from("/13371338/proto/1"), vec![]).unwrap(); - - let mut bytes = BytesMut::with_capacity(32); - bytes.put_u8(MSG_MULTISTREAM_1_0.len() as u8); - let _ = Message::Header(HeaderLine::V1).encode(&mut bytes).unwrap(); - - let proto = Protocol::try_from(&b"/13371338/proto/1"[..]).expect("valid protocol name"); - bytes.put_u8((proto.as_ref().len() + 1) as u8); // + 1 for \n - let _ = Message::Protocol(proto).encode(&mut bytes).unwrap(); - - let expected_message = bytes.freeze().to_vec(); - - assert_eq!(message, expected_message); - } - - #[test] - fn propose_with_fallback() { - let (mut dialer_state, message) = WebRtcDialerState::propose( - ProtocolName::from("/13371338/proto/1"), - vec![ProtocolName::from("/sup/proto/1")], - ) - .unwrap(); - - let mut bytes = BytesMut::with_capacity(32); - bytes.put_u8(MSG_MULTISTREAM_1_0.len() as u8); - let _ = Message::Header(HeaderLine::V1).encode(&mut bytes).unwrap(); - - let proto1 = Protocol::try_from(&b"/13371338/proto/1"[..]).expect("valid protocol name"); - bytes.put_u8((proto1.as_ref().len() + 1) as u8); // + 1 for \n - let _ = Message::Protocol(proto1).encode(&mut bytes).unwrap(); - - let proto2 = Protocol::try_from(&b"/sup/proto/1"[..]).expect("valid protocol name"); - bytes.put_u8((proto2.as_ref().len() + 1) as u8); // + 1 for \n - let _ = Message::Protocol(proto2).encode(&mut bytes).unwrap(); - - let expected_message = bytes.freeze().to_vec(); - - assert_eq!(message, expected_message); - } - - #[test] - fn register_response_header_only() { - let mut bytes = BytesMut::with_capacity(32); - bytes.put_u8(MSG_MULTISTREAM_1_0.len() as u8); - - let message = Message::Header(HeaderLine::V1); - message.encode(&mut bytes).map_err(|_| Error::InvalidData).unwrap(); - - let (mut dialer_state, _message) = - WebRtcDialerState::propose(ProtocolName::from("/13371338/proto/1"), vec![]).unwrap(); - - match dialer_state.register_response(bytes.freeze().to_vec()) { - Ok(HandshakeResult::NotReady) => {} - Err(err) => panic!("unexpected error: {:?}", err), - event => panic!("invalid event: {event:?}"), - } - } - - #[test] - fn header_line_missing() { - // header line missing - let proto = b"/13371338/proto/1"; - let mut bytes = BytesMut::with_capacity(proto.len() + 2); - bytes.put_u8((proto.len() + 1) as u8); - - let response = Message::Protocol(Protocol::try_from(&proto[..]).unwrap()) - .encode(&mut bytes) - .expect("valid message encodes"); - - let response = bytes.freeze().to_vec(); - - let (mut dialer_state, _message) = - WebRtcDialerState::propose(ProtocolName::from("/13371338/proto/1"), vec![]).unwrap(); - - match dialer_state.register_response(response) { - Err(error::NegotiationError::MultistreamSelectError(NegotiationError::Failed)) => {} - event => panic!("invalid event: {event:?}"), - } - } - - #[test] - fn negotiate_main_protocol() { - let message = webrtc_encode_multistream_message(vec![Message::Protocol( - Protocol::try_from(&b"/13371338/proto/1"[..]).unwrap(), - )]) - .unwrap() - .freeze(); - - let (mut dialer_state, _message) = WebRtcDialerState::propose( - ProtocolName::from("/13371338/proto/1"), - vec![ProtocolName::from("/sup/proto/1")], - ) - .unwrap(); - - match dialer_state.register_response(message.to_vec()) { - Ok(HandshakeResult::Succeeded(negotiated)) => { - assert_eq!(negotiated, ProtocolName::from("/13371338/proto/1")) - } - event => panic!("invalid event {event:?}"), - } - } - - #[test] - fn negotiate_fallback_protocol() { - let message = webrtc_encode_multistream_message(vec![Message::Protocol( - Protocol::try_from(&b"/sup/proto/1"[..]).unwrap(), - )]) - .unwrap() - .freeze(); - - let (mut dialer_state, _message) = WebRtcDialerState::propose( - ProtocolName::from("/13371338/proto/1"), - vec![ProtocolName::from("/sup/proto/1")], - ) - .unwrap(); - - match dialer_state.register_response(message.to_vec()) { - Ok(HandshakeResult::Succeeded(negotiated)) => { - assert_eq!(negotiated, ProtocolName::from("/sup/proto/1")) - } - _ => panic!("invalid event"), - } - } + use super::*; + use crate::multistream_select::{listener_select_proto, protocol::MSG_MULTISTREAM_1_0}; + use bytes::BufMut; + use std::time::Duration; + #[tokio::test] + async fn select_proto_basic() { + async fn run(version: Version) { + let (client_connection, server_connection) = futures_ringbuf::Endpoint::pair(100, 100); + + let server: tokio::task::JoinHandle> = tokio::spawn(async move { + let protos = vec!["/proto1", "/proto2"]; + let (proto, mut io) = + listener_select_proto(server_connection, protos).await.unwrap(); + assert_eq!(proto, "/proto2"); + + let mut out = vec![0; 32]; + let n = io.read(&mut out).await.unwrap(); + out.truncate(n); + assert_eq!(out, b"ping"); + + io.write_all(b"pong").await.unwrap(); + io.flush().await.unwrap(); + + Ok(()) + }); + + let client: tokio::task::JoinHandle> = tokio::spawn(async move { + let protos = vec!["/proto3", "/proto2"]; + let (proto, mut io) = + dialer_select_proto(client_connection, protos, version).await.unwrap(); + assert_eq!(proto, "/proto2"); + + io.write_all(b"ping").await.unwrap(); + io.flush().await.unwrap(); + + let mut out = vec![0; 32]; + let n = io.read(&mut out).await.unwrap(); + out.truncate(n); + assert_eq!(out, b"pong"); + + Ok(()) + }); + + server.await.unwrap(); + client.await.unwrap(); + } + + run(Version::V1).await; + run(Version::V1Lazy).await; + } + + /// Tests the expected behaviour of failed negotiations. + #[tokio::test] + async fn negotiation_failed() { + async fn run( + version: Version, + dial_protos: Vec<&'static str>, + dial_payload: Vec, + listen_protos: Vec<&'static str>, + ) { + let (client_connection, server_connection) = futures_ringbuf::Endpoint::pair(100, 100); + + let server: tokio::task::JoinHandle> = tokio::spawn(async move { + let io = match tokio::time::timeout( + Duration::from_secs(2), + listener_select_proto(server_connection, listen_protos), + ) + .await + .unwrap() + { + Ok((_, io)) => io, + Err(NegotiationError::Failed) => return Ok(()), + Err(NegotiationError::ProtocolError(e)) => { + panic!("Unexpected protocol error {e}") + }, + }; + match io.complete().await { + Err(NegotiationError::Failed) => {}, + _ => panic!(), + } + + Ok(()) + }); + + let client: tokio::task::JoinHandle> = tokio::spawn(async move { + let mut io = match tokio::time::timeout( + Duration::from_secs(2), + dialer_select_proto(client_connection, dial_protos, version), + ) + .await + .unwrap() + { + Err(NegotiationError::Failed) => return Ok(()), + Ok((_, io)) => io, + Err(_) => panic!(), + }; + + // The dialer may write a payload that is even sent before it + // got confirmation of the last proposed protocol, when `V1Lazy` + // is used. + io.write_all(&dial_payload).await.unwrap(); + match io.complete().await { + Err(NegotiationError::Failed) => {}, + _ => panic!(), + } + + Ok(()) + }); + + server.await.unwrap(); + client.await.unwrap(); + } + + // Incompatible protocols. + run(Version::V1, vec!["/proto1"], vec![1], vec!["/proto2"]).await; + run(Version::V1Lazy, vec!["/proto1"], vec![1], vec!["/proto2"]).await; + } + + #[tokio::test] + async fn v1_lazy_do_not_wait_for_negotiation_on_poll_close() { + let (client_connection, _server_connection) = + futures_ringbuf::Endpoint::pair(1024 * 1024, 1); + + let client = tokio::spawn(async move { + // Single protocol to allow for lazy (or optimistic) protocol negotiation. + let protos = vec!["/proto1"]; + let (proto, mut io) = + dialer_select_proto(client_connection, protos, Version::V1Lazy).await.unwrap(); + assert_eq!(proto, "/proto1"); + + // In Libp2p the lazy negotation of protocols can be closed at any time, + // even if the negotiation is not yet done. + + // However, for the Litep2p the negotation must conclude before closing the + // lazy negotation of protocol. We'll wait for the close until the + // server has produced a message, in this test that means forever. + io.close().await.unwrap(); + }); + + assert!(tokio::time::timeout(Duration::from_secs(10), client).await.is_ok()); + } + + #[tokio::test] + async fn low_level_negotiate() { + async fn run(version: Version) { + let (client_connection, mut server_connection) = + futures_ringbuf::Endpoint::pair(100, 100); + + let server = tokio::spawn(async move { + let protos = ["/proto2"]; + + let multistream = b"/multistream/1.0.0\n"; + let len = multistream.len(); + let proto = b"/proto2\n"; + let proto_len = proto.len(); + + // Check that our implementation writes optimally + // the multistream ++ protocol in a single message. + let mut expected_message = Vec::new(); + expected_message.push(len as u8); + expected_message.extend_from_slice(multistream); + expected_message.push(proto_len as u8); + expected_message.extend_from_slice(proto); + + if version == Version::V1Lazy { + expected_message.extend_from_slice(b"ping"); + } + + let mut out = vec![0; 64]; + let n = server_connection.read(&mut out).await.unwrap(); + out.truncate(n); + assert_eq!(out, expected_message); + + // We must send the back the multistream packet. + let mut send_message = Vec::new(); + send_message.push(len as u8); + send_message.extend_from_slice(multistream); + + server_connection.write_all(&mut send_message).await.unwrap(); + + let mut send_message = Vec::new(); + send_message.push(proto_len as u8); + send_message.extend_from_slice(proto); + server_connection.write_all(&mut send_message).await.unwrap(); + + // Handle handshake. + match version { + Version::V1 => { + let mut out = vec![0; 64]; + let n = server_connection.read(&mut out).await.unwrap(); + out.truncate(n); + assert_eq!(out, b"ping"); + + server_connection.write_all(b"pong").await.unwrap(); + }, + Version::V1Lazy => { + // Ping (handshake) payload expected in the initial message. + server_connection.write_all(b"pong").await.unwrap(); + }, + } + }); + + let client = tokio::spawn(async move { + let protos = vec!["/proto2"]; + let (proto, mut io) = + dialer_select_proto(client_connection, protos, version).await.unwrap(); + assert_eq!(proto, "/proto2"); + + io.write_all(b"ping").await.unwrap(); + io.flush().await.unwrap(); + + let mut out = vec![0; 32]; + let n = io.read(&mut out).await.unwrap(); + out.truncate(n); + assert_eq!(out, b"pong"); + }); + + server.await.unwrap(); + client.await.unwrap(); + } + + run(Version::V1).await; + run(Version::V1Lazy).await; + } + + #[tokio::test] + async fn v1_low_level_negotiate_multiple_headers() { + let (client_connection, mut server_connection) = futures_ringbuf::Endpoint::pair(100, 100); + + let server = tokio::spawn(async move { + let protos = ["/proto2"]; + + let multistream = b"/multistream/1.0.0\n"; + let len = multistream.len(); + let proto = b"/proto2\n"; + let proto_len = proto.len(); + + // Check that our implementation writes optimally + // the multistream ++ protocol in a single message. + let mut expected_message = Vec::new(); + expected_message.push(len as u8); + expected_message.extend_from_slice(multistream); + expected_message.push(proto_len as u8); + expected_message.extend_from_slice(proto); + + let mut out = vec![0; 64]; + let n = server_connection.read(&mut out).await.unwrap(); + out.truncate(n); + assert_eq!(out, expected_message); + + // We must send the back the multistream packet. + let mut send_message = Vec::new(); + send_message.push(len as u8); + send_message.extend_from_slice(multistream); + + server_connection.write_all(&mut send_message).await.unwrap(); + + // We must send the back the multistream packet again. + let mut send_message = Vec::new(); + send_message.push(len as u8); + send_message.extend_from_slice(multistream); + + server_connection.write_all(&mut send_message).await.unwrap(); + }); + + let client = tokio::spawn(async move { + let protos = vec!["/proto2"]; + + // Negotiation fails because the protocol receives the `/multistream/1.0.0` header + // multiple times. + let result = + dialer_select_proto(client_connection, protos, Version::V1).await.unwrap_err(); + match result { + NegotiationError::ProtocolError(ProtocolError::InvalidMessage) => {}, + _ => panic!("unexpected error: {:?}", result), + }; + }); + + server.await.unwrap(); + client.await.unwrap(); + } + + #[tokio::test] + async fn v1_lazy_low_level_negotiate_multiple_headers() { + let (client_connection, mut server_connection) = futures_ringbuf::Endpoint::pair(100, 100); + + let server = tokio::spawn(async move { + let protos = ["/proto2"]; + + let multistream = b"/multistream/1.0.0\n"; + let len = multistream.len(); + let proto = b"/proto2\n"; + let proto_len = proto.len(); + + // Check that our implementation writes optimally + // the multistream ++ protocol in a single message. + let mut expected_message = Vec::new(); + expected_message.push(len as u8); + expected_message.extend_from_slice(multistream); + expected_message.push(proto_len as u8); + expected_message.extend_from_slice(proto); + + let mut out = vec![0; 64]; + let n = server_connection.read(&mut out).await.unwrap(); + out.truncate(n); + assert_eq!(out, expected_message); + + // We must send the back the multistream packet. + let mut send_message = Vec::new(); + send_message.push(len as u8); + send_message.extend_from_slice(multistream); + + server_connection.write_all(&mut send_message).await.unwrap(); + + // We must send the back the multistream packet again. + let mut send_message = Vec::new(); + send_message.push(len as u8); + send_message.extend_from_slice(multistream); + + server_connection.write_all(&mut send_message).await.unwrap(); + }); + + let client = tokio::spawn(async move { + let protos = vec!["/proto2"]; + + // Negotiation fails because the protocol receives the `/multistream/1.0.0` header + // multiple times. + let (proto, to_negociate) = + dialer_select_proto(client_connection, protos, Version::V1Lazy).await.unwrap(); + assert_eq!(proto, "/proto2"); + + let result = to_negociate.complete().await.unwrap_err(); + + match result { + NegotiationError::ProtocolError(ProtocolError::InvalidMessage) => {}, + _ => panic!("unexpected error: {:?}", result), + }; + }); + + server.await.unwrap(); + client.await.unwrap(); + } + + #[test] + fn propose() { + let (mut dialer_state, message) = + WebRtcDialerState::propose(ProtocolName::from("/13371338/proto/1"), vec![]).unwrap(); + + let mut bytes = BytesMut::with_capacity(32); + bytes.put_u8(MSG_MULTISTREAM_1_0.len() as u8); + let _ = Message::Header(HeaderLine::V1).encode(&mut bytes).unwrap(); + + let proto = Protocol::try_from(&b"/13371338/proto/1"[..]).expect("valid protocol name"); + bytes.put_u8((proto.as_ref().len() + 1) as u8); // + 1 for \n + let _ = Message::Protocol(proto).encode(&mut bytes).unwrap(); + + let expected_message = bytes.freeze().to_vec(); + + assert_eq!(message, expected_message); + } + + #[test] + fn propose_with_fallback() { + let (mut dialer_state, message) = WebRtcDialerState::propose( + ProtocolName::from("/13371338/proto/1"), + vec![ProtocolName::from("/sup/proto/1")], + ) + .unwrap(); + + let mut bytes = BytesMut::with_capacity(32); + bytes.put_u8(MSG_MULTISTREAM_1_0.len() as u8); + let _ = Message::Header(HeaderLine::V1).encode(&mut bytes).unwrap(); + + let proto1 = Protocol::try_from(&b"/13371338/proto/1"[..]).expect("valid protocol name"); + bytes.put_u8((proto1.as_ref().len() + 1) as u8); // + 1 for \n + let _ = Message::Protocol(proto1).encode(&mut bytes).unwrap(); + + let proto2 = Protocol::try_from(&b"/sup/proto/1"[..]).expect("valid protocol name"); + bytes.put_u8((proto2.as_ref().len() + 1) as u8); // + 1 for \n + let _ = Message::Protocol(proto2).encode(&mut bytes).unwrap(); + + let expected_message = bytes.freeze().to_vec(); + + assert_eq!(message, expected_message); + } + + #[test] + fn register_response_header_only() { + let mut bytes = BytesMut::with_capacity(32); + bytes.put_u8(MSG_MULTISTREAM_1_0.len() as u8); + + let message = Message::Header(HeaderLine::V1); + message.encode(&mut bytes).map_err(|_| Error::InvalidData).unwrap(); + + let (mut dialer_state, _message) = + WebRtcDialerState::propose(ProtocolName::from("/13371338/proto/1"), vec![]).unwrap(); + + match dialer_state.register_response(bytes.freeze().to_vec()) { + Ok(HandshakeResult::NotReady) => {}, + Err(err) => panic!("unexpected error: {:?}", err), + event => panic!("invalid event: {event:?}"), + } + } + + #[test] + fn header_line_missing() { + // header line missing + let proto = b"/13371338/proto/1"; + let mut bytes = BytesMut::with_capacity(proto.len() + 2); + bytes.put_u8((proto.len() + 1) as u8); + + let response = Message::Protocol(Protocol::try_from(&proto[..]).unwrap()) + .encode(&mut bytes) + .expect("valid message encodes"); + + let response = bytes.freeze().to_vec(); + + let (mut dialer_state, _message) = + WebRtcDialerState::propose(ProtocolName::from("/13371338/proto/1"), vec![]).unwrap(); + + match dialer_state.register_response(response) { + Err(error::NegotiationError::MultistreamSelectError(NegotiationError::Failed)) => {}, + event => panic!("invalid event: {event:?}"), + } + } + + #[test] + fn negotiate_main_protocol() { + let message = webrtc_encode_multistream_message(vec![Message::Protocol( + Protocol::try_from(&b"/13371338/proto/1"[..]).unwrap(), + )]) + .unwrap() + .freeze(); + + let (mut dialer_state, _message) = WebRtcDialerState::propose( + ProtocolName::from("/13371338/proto/1"), + vec![ProtocolName::from("/sup/proto/1")], + ) + .unwrap(); + + match dialer_state.register_response(message.to_vec()) { + Ok(HandshakeResult::Succeeded(negotiated)) => { + assert_eq!(negotiated, ProtocolName::from("/13371338/proto/1")) + }, + event => panic!("invalid event {event:?}"), + } + } + + #[test] + fn negotiate_fallback_protocol() { + let message = webrtc_encode_multistream_message(vec![Message::Protocol( + Protocol::try_from(&b"/sup/proto/1"[..]).unwrap(), + )]) + .unwrap() + .freeze(); + + let (mut dialer_state, _message) = WebRtcDialerState::propose( + ProtocolName::from("/13371338/proto/1"), + vec![ProtocolName::from("/sup/proto/1")], + ) + .unwrap(); + + match dialer_state.register_response(message.to_vec()) { + Ok(HandshakeResult::Succeeded(negotiated)) => { + assert_eq!(negotiated, ProtocolName::from("/sup/proto/1")) + }, + _ => panic!("invalid event"), + } + } } diff --git a/client/litep2p/src/multistream_select/length_delimited.rs b/client/litep2p/src/multistream_select/length_delimited.rs index 7052d629..2e583107 100644 --- a/client/litep2p/src/multistream_select/length_delimited.rs +++ b/client/litep2p/src/multistream_select/length_delimited.rs @@ -21,10 +21,10 @@ use bytes::{Buf as _, BufMut as _, Bytes, BytesMut}; use futures::{io::IoSlice, prelude::*}; use std::{ - convert::TryFrom as _, - io, - pin::Pin, - task::{Context, Poll}, + convert::TryFrom as _, + io, + pin::Pin, + task::{Context, Poll}, }; const MAX_LEN_BYTES: u16 = 2; @@ -41,251 +41,245 @@ const LOG_TARGET: &str = "litep2p::multistream-select"; #[pin_project::pin_project] #[derive(Debug)] pub struct LengthDelimited { - /// The inner I/O resource. - #[pin] - inner: R, - /// Read buffer for a single incoming unsigned-varint length-delimited frame. - read_buffer: BytesMut, - /// Write buffer for outgoing unsigned-varint length-delimited frames. - write_buffer: BytesMut, - /// The current read state, alternating between reading a frame - /// length and reading a frame payload. - read_state: ReadState, + /// The inner I/O resource. + #[pin] + inner: R, + /// Read buffer for a single incoming unsigned-varint length-delimited frame. + read_buffer: BytesMut, + /// Write buffer for outgoing unsigned-varint length-delimited frames. + write_buffer: BytesMut, + /// The current read state, alternating between reading a frame + /// length and reading a frame payload. + read_state: ReadState, } #[derive(Debug, Copy, Clone, PartialEq, Eq)] enum ReadState { - /// We are currently reading the length of the next frame of data. - ReadLength { - buf: [u8; MAX_LEN_BYTES as usize], - pos: usize, - }, - /// We are currently reading the frame of data itself. - ReadData { len: u16, pos: usize }, + /// We are currently reading the length of the next frame of data. + ReadLength { buf: [u8; MAX_LEN_BYTES as usize], pos: usize }, + /// We are currently reading the frame of data itself. + ReadData { len: u16, pos: usize }, } impl Default for ReadState { - fn default() -> Self { - ReadState::ReadLength { - buf: [0; MAX_LEN_BYTES as usize], - pos: 0, - } - } + fn default() -> Self { + ReadState::ReadLength { buf: [0; MAX_LEN_BYTES as usize], pos: 0 } + } } impl LengthDelimited { - /// Creates a new I/O resource for reading and writing unsigned-varint - /// length delimited frames. - pub fn new(inner: R) -> LengthDelimited { - LengthDelimited { - inner, - read_state: ReadState::default(), - read_buffer: BytesMut::with_capacity(DEFAULT_BUFFER_SIZE), - write_buffer: BytesMut::with_capacity(DEFAULT_BUFFER_SIZE + MAX_LEN_BYTES as usize), - } - } - - /// Drops the [`LengthDelimited`] resource, yielding the underlying I/O stream. - /// - /// # Panic - /// - /// Will panic if called while there is data in the read or write buffer. - /// The read buffer is guaranteed to be empty whenever `Stream::poll` yields - /// a new `Bytes` frame. The write buffer is guaranteed to be empty after - /// flushing. - pub fn into_inner(self) -> R { - assert!(self.read_buffer.is_empty()); - assert!(self.write_buffer.is_empty()); - self.inner - } - - /// Converts the [`LengthDelimited`] into a [`LengthDelimitedReader`], dropping the - /// uvi-framed `Sink` in favour of direct `AsyncWrite` access to the underlying - /// I/O stream. - /// - /// This is typically done if further uvi-framed messages are expected to be - /// received but no more such messages are written, allowing the writing of - /// follow-up protocol data to commence. - pub fn into_reader(self) -> LengthDelimitedReader { - LengthDelimitedReader { inner: self } - } - - /// Writes all buffered frame data to the underlying I/O stream, - /// _without flushing it_. - /// - /// After this method returns `Poll::Ready`, the write buffer of frames - /// submitted to the `Sink` is guaranteed to be empty. - pub fn poll_write_buffer( - self: Pin<&mut Self>, - cx: &mut Context<'_>, - ) -> Poll> - where - R: AsyncWrite, - { - let mut this = self.project(); - - while !this.write_buffer.is_empty() { - match this.inner.as_mut().poll_write(cx, this.write_buffer) { - Poll::Pending => return Poll::Pending, - Poll::Ready(Ok(0)) => - return Poll::Ready(Err(io::Error::new( - io::ErrorKind::WriteZero, - "Failed to write buffered frame.", - ))), - Poll::Ready(Ok(n)) => this.write_buffer.advance(n), - Poll::Ready(Err(err)) => return Poll::Ready(Err(err)), - } - } - - Poll::Ready(Ok(())) - } + /// Creates a new I/O resource for reading and writing unsigned-varint + /// length delimited frames. + pub fn new(inner: R) -> LengthDelimited { + LengthDelimited { + inner, + read_state: ReadState::default(), + read_buffer: BytesMut::with_capacity(DEFAULT_BUFFER_SIZE), + write_buffer: BytesMut::with_capacity(DEFAULT_BUFFER_SIZE + MAX_LEN_BYTES as usize), + } + } + + /// Drops the [`LengthDelimited`] resource, yielding the underlying I/O stream. + /// + /// # Panic + /// + /// Will panic if called while there is data in the read or write buffer. + /// The read buffer is guaranteed to be empty whenever `Stream::poll` yields + /// a new `Bytes` frame. The write buffer is guaranteed to be empty after + /// flushing. + pub fn into_inner(self) -> R { + assert!(self.read_buffer.is_empty()); + assert!(self.write_buffer.is_empty()); + self.inner + } + + /// Converts the [`LengthDelimited`] into a [`LengthDelimitedReader`], dropping the + /// uvi-framed `Sink` in favour of direct `AsyncWrite` access to the underlying + /// I/O stream. + /// + /// This is typically done if further uvi-framed messages are expected to be + /// received but no more such messages are written, allowing the writing of + /// follow-up protocol data to commence. + pub fn into_reader(self) -> LengthDelimitedReader { + LengthDelimitedReader { inner: self } + } + + /// Writes all buffered frame data to the underlying I/O stream, + /// _without flushing it_. + /// + /// After this method returns `Poll::Ready`, the write buffer of frames + /// submitted to the `Sink` is guaranteed to be empty. + pub fn poll_write_buffer( + self: Pin<&mut Self>, + cx: &mut Context<'_>, + ) -> Poll> + where + R: AsyncWrite, + { + let mut this = self.project(); + + while !this.write_buffer.is_empty() { + match this.inner.as_mut().poll_write(cx, this.write_buffer) { + Poll::Pending => return Poll::Pending, + Poll::Ready(Ok(0)) => + return Poll::Ready(Err(io::Error::new( + io::ErrorKind::WriteZero, + "Failed to write buffered frame.", + ))), + Poll::Ready(Ok(n)) => this.write_buffer.advance(n), + Poll::Ready(Err(err)) => return Poll::Ready(Err(err)), + } + } + + Poll::Ready(Ok(())) + } } impl Stream for LengthDelimited where - R: AsyncRead, + R: AsyncRead, { - type Item = Result; - - fn poll_next(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll> { - let mut this = self.project(); - - loop { - match this.read_state { - ReadState::ReadLength { buf, pos } => { - match this.inner.as_mut().poll_read(cx, &mut buf[*pos..*pos + 1]) { - Poll::Ready(Ok(0)) => - if *pos == 0 { - return Poll::Ready(None); - } else { - return Poll::Ready(Some(Err(io::ErrorKind::UnexpectedEof.into()))); - }, - Poll::Ready(Ok(n)) => { - debug_assert_eq!(n, 1); - *pos += n; - } - Poll::Ready(Err(err)) => return Poll::Ready(Some(Err(err))), - Poll::Pending => return Poll::Pending, - }; - - if (buf[*pos - 1] & 0x80) == 0 { - // MSB is not set, indicating the end of the length prefix. - let (len, _) = unsigned_varint::decode::u16(buf).map_err(|e| { - tracing::debug!(target: LOG_TARGET, "invalid length prefix: {}", e); - io::Error::new(io::ErrorKind::InvalidData, "invalid length prefix") - })?; - - if len >= 1 { - *this.read_state = ReadState::ReadData { len, pos: 0 }; - this.read_buffer.resize(len as usize, 0); - } else { - debug_assert_eq!(len, 0); - *this.read_state = ReadState::default(); - return Poll::Ready(Some(Ok(Bytes::new()))); - } - } else if *pos == MAX_LEN_BYTES as usize { - // MSB signals more length bytes but we have already read the maximum. - // See the module documentation about the max frame len. - return Poll::Ready(Some(Err(io::Error::new( - io::ErrorKind::InvalidData, - "Maximum frame length exceeded", - )))); - } - } - ReadState::ReadData { len, pos } => { - match this.inner.as_mut().poll_read(cx, &mut this.read_buffer[*pos..]) { - Poll::Ready(Ok(0)) => - return Poll::Ready(Some(Err(io::ErrorKind::UnexpectedEof.into()))), - Poll::Ready(Ok(n)) => *pos += n, - Poll::Pending => return Poll::Pending, - Poll::Ready(Err(err)) => return Poll::Ready(Some(Err(err))), - }; - - if *pos == *len as usize { - // Finished reading the frame. - let frame = this.read_buffer.split_off(0).freeze(); - *this.read_state = ReadState::default(); - return Poll::Ready(Some(Ok(frame))); - } - } - } - } - } + type Item = Result; + + fn poll_next(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll> { + let mut this = self.project(); + + loop { + match this.read_state { + ReadState::ReadLength { buf, pos } => { + match this.inner.as_mut().poll_read(cx, &mut buf[*pos..*pos + 1]) { + Poll::Ready(Ok(0)) => + if *pos == 0 { + return Poll::Ready(None); + } else { + return Poll::Ready(Some(Err(io::ErrorKind::UnexpectedEof.into()))); + }, + Poll::Ready(Ok(n)) => { + debug_assert_eq!(n, 1); + *pos += n; + }, + Poll::Ready(Err(err)) => return Poll::Ready(Some(Err(err))), + Poll::Pending => return Poll::Pending, + }; + + if (buf[*pos - 1] & 0x80) == 0 { + // MSB is not set, indicating the end of the length prefix. + let (len, _) = unsigned_varint::decode::u16(buf).map_err(|e| { + tracing::debug!(target: LOG_TARGET, "invalid length prefix: {}", e); + io::Error::new(io::ErrorKind::InvalidData, "invalid length prefix") + })?; + + if len >= 1 { + *this.read_state = ReadState::ReadData { len, pos: 0 }; + this.read_buffer.resize(len as usize, 0); + } else { + debug_assert_eq!(len, 0); + *this.read_state = ReadState::default(); + return Poll::Ready(Some(Ok(Bytes::new()))); + } + } else if *pos == MAX_LEN_BYTES as usize { + // MSB signals more length bytes but we have already read the maximum. + // See the module documentation about the max frame len. + return Poll::Ready(Some(Err(io::Error::new( + io::ErrorKind::InvalidData, + "Maximum frame length exceeded", + )))); + } + }, + ReadState::ReadData { len, pos } => { + match this.inner.as_mut().poll_read(cx, &mut this.read_buffer[*pos..]) { + Poll::Ready(Ok(0)) => + return Poll::Ready(Some(Err(io::ErrorKind::UnexpectedEof.into()))), + Poll::Ready(Ok(n)) => *pos += n, + Poll::Pending => return Poll::Pending, + Poll::Ready(Err(err)) => return Poll::Ready(Some(Err(err))), + }; + + if *pos == *len as usize { + // Finished reading the frame. + let frame = this.read_buffer.split_off(0).freeze(); + *this.read_state = ReadState::default(); + return Poll::Ready(Some(Ok(frame))); + } + }, + } + } + } } impl Sink for LengthDelimited where - R: AsyncWrite, + R: AsyncWrite, { - type Error = io::Error; - - fn poll_ready(mut self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll> { - // Use the maximum frame length also as a (soft) upper limit - // for the entire write buffer. The actual (hard) limit is thus - // implied to be roughly 2 * MAX_FRAME_SIZE. - if self.as_mut().project().write_buffer.len() >= MAX_FRAME_SIZE as usize { - match self.as_mut().poll_write_buffer(cx) { - Poll::Ready(Ok(())) => {} - Poll::Ready(Err(err)) => return Poll::Ready(Err(err)), - Poll::Pending => return Poll::Pending, - } - - debug_assert!(self.as_mut().project().write_buffer.is_empty()); - } - - Poll::Ready(Ok(())) - } - - fn start_send(self: Pin<&mut Self>, item: Bytes) -> Result<(), Self::Error> { - let this = self.project(); - - let len = match u16::try_from(item.len()) { - Ok(len) if len <= MAX_FRAME_SIZE => len, - _ => - return Err(io::Error::new( - io::ErrorKind::InvalidData, - "Maximum frame size exceeded.", - )), - }; - - let mut uvi_buf = unsigned_varint::encode::u16_buffer(); - let uvi_len = unsigned_varint::encode::u16(len, &mut uvi_buf); - this.write_buffer.reserve(len as usize + uvi_len.len()); - this.write_buffer.put(uvi_len); - this.write_buffer.put(item); - - Ok(()) - } - - fn poll_flush(mut self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll> { - // Write all buffered frame data to the underlying I/O stream. - match LengthDelimited::poll_write_buffer(self.as_mut(), cx) { - Poll::Ready(Ok(())) => {} - Poll::Ready(Err(err)) => return Poll::Ready(Err(err)), - Poll::Pending => return Poll::Pending, - } - - let this = self.project(); - debug_assert!(this.write_buffer.is_empty()); - - // Flush the underlying I/O stream. - this.inner.poll_flush(cx) - } - - fn poll_close(mut self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll> { - // Write all buffered frame data to the underlying I/O stream. - match LengthDelimited::poll_write_buffer(self.as_mut(), cx) { - Poll::Ready(Ok(())) => {} - Poll::Ready(Err(err)) => return Poll::Ready(Err(err)), - Poll::Pending => return Poll::Pending, - } - - let this = self.project(); - debug_assert!(this.write_buffer.is_empty()); - - // Close the underlying I/O stream. - this.inner.poll_close(cx) - } + type Error = io::Error; + + fn poll_ready(mut self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll> { + // Use the maximum frame length also as a (soft) upper limit + // for the entire write buffer. The actual (hard) limit is thus + // implied to be roughly 2 * MAX_FRAME_SIZE. + if self.as_mut().project().write_buffer.len() >= MAX_FRAME_SIZE as usize { + match self.as_mut().poll_write_buffer(cx) { + Poll::Ready(Ok(())) => {}, + Poll::Ready(Err(err)) => return Poll::Ready(Err(err)), + Poll::Pending => return Poll::Pending, + } + + debug_assert!(self.as_mut().project().write_buffer.is_empty()); + } + + Poll::Ready(Ok(())) + } + + fn start_send(self: Pin<&mut Self>, item: Bytes) -> Result<(), Self::Error> { + let this = self.project(); + + let len = match u16::try_from(item.len()) { + Ok(len) if len <= MAX_FRAME_SIZE => len, + _ => + return Err(io::Error::new( + io::ErrorKind::InvalidData, + "Maximum frame size exceeded.", + )), + }; + + let mut uvi_buf = unsigned_varint::encode::u16_buffer(); + let uvi_len = unsigned_varint::encode::u16(len, &mut uvi_buf); + this.write_buffer.reserve(len as usize + uvi_len.len()); + this.write_buffer.put(uvi_len); + this.write_buffer.put(item); + + Ok(()) + } + + fn poll_flush(mut self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll> { + // Write all buffered frame data to the underlying I/O stream. + match LengthDelimited::poll_write_buffer(self.as_mut(), cx) { + Poll::Ready(Ok(())) => {}, + Poll::Ready(Err(err)) => return Poll::Ready(Err(err)), + Poll::Pending => return Poll::Pending, + } + + let this = self.project(); + debug_assert!(this.write_buffer.is_empty()); + + // Flush the underlying I/O stream. + this.inner.poll_flush(cx) + } + + fn poll_close(mut self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll> { + // Write all buffered frame data to the underlying I/O stream. + match LengthDelimited::poll_write_buffer(self.as_mut(), cx) { + Poll::Ready(Ok(())) => {}, + Poll::Ready(Err(err)) => return Poll::Ready(Err(err)), + Poll::Pending => return Poll::Pending, + } + + let this = self.project(); + debug_assert!(this.write_buffer.is_empty()); + + // Close the underlying I/O stream. + this.inner.poll_close(cx) + } } /// A `LengthDelimitedReader` implements a `Stream` of uvi-length-delimited @@ -293,86 +287,86 @@ where #[pin_project::pin_project] #[derive(Debug)] pub struct LengthDelimitedReader { - #[pin] - inner: LengthDelimited, + #[pin] + inner: LengthDelimited, } impl LengthDelimitedReader { - /// Destroys the `LengthDelimitedReader` and returns the underlying I/O stream. - /// - /// This method is guaranteed not to drop any data read from or not yet - /// submitted to the underlying I/O stream. - /// - /// # Panic - /// - /// Will panic if called while there is data in the read or write buffer. - /// The read buffer is guaranteed to be empty whenever [`Stream::poll_next`] - /// yield a new `Message`. The write buffer is guaranteed to be empty whenever - /// [`LengthDelimited::poll_write_buffer`] yields [`Poll::Ready`] or after - /// the [`Sink`] has been completely flushed via [`Sink::poll_flush`]. - pub fn into_inner(self) -> R { - self.inner.into_inner() - } + /// Destroys the `LengthDelimitedReader` and returns the underlying I/O stream. + /// + /// This method is guaranteed not to drop any data read from or not yet + /// submitted to the underlying I/O stream. + /// + /// # Panic + /// + /// Will panic if called while there is data in the read or write buffer. + /// The read buffer is guaranteed to be empty whenever [`Stream::poll_next`] + /// yield a new `Message`. The write buffer is guaranteed to be empty whenever + /// [`LengthDelimited::poll_write_buffer`] yields [`Poll::Ready`] or after + /// the [`Sink`] has been completely flushed via [`Sink::poll_flush`]. + pub fn into_inner(self) -> R { + self.inner.into_inner() + } } impl Stream for LengthDelimitedReader where - R: AsyncRead, + R: AsyncRead, { - type Item = Result; + type Item = Result; - fn poll_next(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll> { - self.project().inner.poll_next(cx) - } + fn poll_next(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll> { + self.project().inner.poll_next(cx) + } } impl AsyncWrite for LengthDelimitedReader where - R: AsyncWrite, + R: AsyncWrite, { - fn poll_write( - self: Pin<&mut Self>, - cx: &mut Context<'_>, - buf: &[u8], - ) -> Poll> { - // `this` here designates the `LengthDelimited`. - let mut this = self.project().inner; - - // We need to flush any data previously written with the `LengthDelimited`. - match LengthDelimited::poll_write_buffer(this.as_mut(), cx) { - Poll::Ready(Ok(())) => {} - Poll::Ready(Err(err)) => return Poll::Ready(Err(err)), - Poll::Pending => return Poll::Pending, - } - debug_assert!(this.write_buffer.is_empty()); - - this.project().inner.poll_write(cx, buf) - } - - fn poll_flush(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll> { - self.project().inner.poll_flush(cx) - } - - fn poll_close(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll> { - self.project().inner.poll_close(cx) - } - - fn poll_write_vectored( - self: Pin<&mut Self>, - cx: &mut Context<'_>, - bufs: &[IoSlice<'_>], - ) -> Poll> { - // `this` here designates the `LengthDelimited`. - let mut this = self.project().inner; - - // We need to flush any data previously written with the `LengthDelimited`. - match LengthDelimited::poll_write_buffer(this.as_mut(), cx) { - Poll::Ready(Ok(())) => {} - Poll::Ready(Err(err)) => return Poll::Ready(Err(err)), - Poll::Pending => return Poll::Pending, - } - debug_assert!(this.write_buffer.is_empty()); - - this.project().inner.poll_write_vectored(cx, bufs) - } + fn poll_write( + self: Pin<&mut Self>, + cx: &mut Context<'_>, + buf: &[u8], + ) -> Poll> { + // `this` here designates the `LengthDelimited`. + let mut this = self.project().inner; + + // We need to flush any data previously written with the `LengthDelimited`. + match LengthDelimited::poll_write_buffer(this.as_mut(), cx) { + Poll::Ready(Ok(())) => {}, + Poll::Ready(Err(err)) => return Poll::Ready(Err(err)), + Poll::Pending => return Poll::Pending, + } + debug_assert!(this.write_buffer.is_empty()); + + this.project().inner.poll_write(cx, buf) + } + + fn poll_flush(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll> { + self.project().inner.poll_flush(cx) + } + + fn poll_close(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll> { + self.project().inner.poll_close(cx) + } + + fn poll_write_vectored( + self: Pin<&mut Self>, + cx: &mut Context<'_>, + bufs: &[IoSlice<'_>], + ) -> Poll> { + // `this` here designates the `LengthDelimited`. + let mut this = self.project().inner; + + // We need to flush any data previously written with the `LengthDelimited`. + match LengthDelimited::poll_write_buffer(this.as_mut(), cx) { + Poll::Ready(Ok(())) => {}, + Poll::Ready(Err(err)) => return Poll::Ready(Err(err)), + Poll::Pending => return Poll::Pending, + } + debug_assert!(this.write_buffer.is_empty()); + + this.project().inner.poll_write_vectored(cx, bufs) + } } diff --git a/client/litep2p/src/multistream_select/listener_select.rs b/client/litep2p/src/multistream_select/listener_select.rs index 6faa2fe0..87ab74bc 100644 --- a/client/litep2p/src/multistream_select/listener_select.rs +++ b/client/litep2p/src/multistream_select/listener_select.rs @@ -22,28 +22,28 @@ //! in a multistream-select protocol negotiation. use crate::{ - codec::unsigned_varint::UnsignedVarint, - error::{self, Error}, - multistream_select::{ - drain_trailing_protocols, - protocol::{ - webrtc_encode_multistream_message, HeaderLine, Message, MessageIO, Protocol, - ProtocolError, PROTO_MULTISTREAM_1_0, - }, - Negotiated, NegotiationError, - }, - types::protocol::ProtocolName, + codec::unsigned_varint::UnsignedVarint, + error::{self, Error}, + multistream_select::{ + drain_trailing_protocols, + protocol::{ + webrtc_encode_multistream_message, HeaderLine, Message, MessageIO, Protocol, + ProtocolError, PROTO_MULTISTREAM_1_0, + }, + Negotiated, NegotiationError, + }, + types::protocol::ProtocolName, }; use bytes::{Bytes, BytesMut}; use futures::prelude::*; use smallvec::SmallVec; use std::{ - convert::TryFrom as _, - iter::FromIterator, - mem, - pin::Pin, - task::{Context, Poll}, + convert::TryFrom as _, + iter::FromIterator, + mem, + pin::Pin, + task::{Context, Poll}, }; const LOG_TARGET: &str = "litep2p::multistream-select"; @@ -57,290 +57,259 @@ const LOG_TARGET: &str = "litep2p::multistream-select"; /// a [`Negotiated`] I/O stream. pub fn listener_select_proto(inner: R, protocols: I) -> ListenerSelectFuture where - R: AsyncRead + AsyncWrite, - I: IntoIterator, - I::Item: AsRef<[u8]>, + R: AsyncRead + AsyncWrite, + I: IntoIterator, + I::Item: AsRef<[u8]>, { - let protocols = protocols.into_iter().filter_map(|n| match Protocol::try_from(n.as_ref()) { - Ok(p) => Some((n, p)), - Err(e) => { - tracing::warn!( - target: LOG_TARGET, - "Listener: Ignoring invalid protocol: {} due to {}", - String::from_utf8_lossy(n.as_ref()), - e - ); - None - } - }); - ListenerSelectFuture { - protocols: SmallVec::from_iter(protocols), - state: State::RecvHeader { - io: MessageIO::new(inner), - }, - last_sent_na: false, - } + let protocols = protocols.into_iter().filter_map(|n| match Protocol::try_from(n.as_ref()) { + Ok(p) => Some((n, p)), + Err(e) => { + tracing::warn!( + target: LOG_TARGET, + "Listener: Ignoring invalid protocol: {} due to {}", + String::from_utf8_lossy(n.as_ref()), + e + ); + None + }, + }); + ListenerSelectFuture { + protocols: SmallVec::from_iter(protocols), + state: State::RecvHeader { io: MessageIO::new(inner) }, + last_sent_na: false, + } } /// The `Future` returned by [`listener_select_proto`] that performs a /// multistream-select protocol negotiation on an underlying I/O stream. #[pin_project::pin_project] pub struct ListenerSelectFuture { - protocols: SmallVec<[(N, Protocol); 8]>, - state: State, - /// Whether the last message sent was a protocol rejection (i.e. `na\n`). - /// - /// If the listener reads garbage or EOF after such a rejection, - /// the dialer is likely using `V1Lazy` and negotiation must be - /// considered failed, but not with a protocol violation or I/O - /// error. - last_sent_na: bool, + protocols: SmallVec<[(N, Protocol); 8]>, + state: State, + /// Whether the last message sent was a protocol rejection (i.e. `na\n`). + /// + /// If the listener reads garbage or EOF after such a rejection, + /// the dialer is likely using `V1Lazy` and negotiation must be + /// considered failed, but not with a protocol violation or I/O + /// error. + last_sent_na: bool, } enum State { - RecvHeader { - io: MessageIO, - }, - SendHeader { - io: MessageIO, - }, - RecvMessage { - io: MessageIO, - }, - SendMessage { - io: MessageIO, - message: Message, - protocol: Option, - }, - Flush { - io: MessageIO, - protocol: Option, - }, - Done, + RecvHeader { io: MessageIO }, + SendHeader { io: MessageIO }, + RecvMessage { io: MessageIO }, + SendMessage { io: MessageIO, message: Message, protocol: Option }, + Flush { io: MessageIO, protocol: Option }, + Done, } impl Future for ListenerSelectFuture where - // The Unpin bound here is required because we - // produce a `Negotiated` as the output. - // It also makes the implementation considerably - // easier to write. - R: AsyncRead + AsyncWrite + Unpin, - N: AsRef<[u8]> + Clone, + // The Unpin bound here is required because we + // produce a `Negotiated` as the output. + // It also makes the implementation considerably + // easier to write. + R: AsyncRead + AsyncWrite + Unpin, + N: AsRef<[u8]> + Clone, { - type Output = Result<(N, Negotiated), NegotiationError>; - - fn poll(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll { - let this = self.project(); - - loop { - match mem::replace(this.state, State::Done) { - State::RecvHeader { mut io } => { - match io.poll_next_unpin(cx) { - Poll::Ready(Some(Ok(Message::Header(h)))) => match h { - HeaderLine::V1 => *this.state = State::SendHeader { io }, - }, - Poll::Ready(Some(Ok(_))) => - return Poll::Ready(Err(ProtocolError::InvalidMessage.into())), - Poll::Ready(Some(Err(err))) => return Poll::Ready(Err(From::from(err))), - // Treat EOF error as [`NegotiationError::Failed`], not as - // [`NegotiationError::ProtocolError`], allowing dropping or closing an I/O - // stream as a permissible way to "gracefully" fail a negotiation. - Poll::Ready(None) => return Poll::Ready(Err(NegotiationError::Failed)), - Poll::Pending => { - *this.state = State::RecvHeader { io }; - return Poll::Pending; - } - } - } - - State::SendHeader { mut io } => { - match Pin::new(&mut io).poll_ready(cx) { - Poll::Pending => { - *this.state = State::SendHeader { io }; - return Poll::Pending; - } - Poll::Ready(Ok(())) => {} - Poll::Ready(Err(err)) => return Poll::Ready(Err(From::from(err))), - } - - let msg = Message::Header(HeaderLine::V1); - if let Err(err) = Pin::new(&mut io).start_send(msg) { - return Poll::Ready(Err(From::from(err))); - } - - *this.state = State::Flush { io, protocol: None }; - } - - State::RecvMessage { mut io } => { - let msg = match Pin::new(&mut io).poll_next(cx) { - Poll::Ready(Some(Ok(msg))) => msg, - // Treat EOF error as [`NegotiationError::Failed`], not as - // [`NegotiationError::ProtocolError`], allowing dropping or closing an I/O - // stream as a permissible way to "gracefully" fail a negotiation. - // - // This is e.g. important when a listener rejects a protocol with - // [`Message::NotAvailable`] and the dialer does not have alternative - // protocols to propose. Then the dialer will stop the negotiation and drop - // the corresponding stream. As a listener this EOF should be interpreted as - // a failed negotiation. - Poll::Ready(None) => return Poll::Ready(Err(NegotiationError::Failed)), - Poll::Pending => { - *this.state = State::RecvMessage { io }; - return Poll::Pending; - } - Poll::Ready(Some(Err(err))) => { - if *this.last_sent_na { - // When we read garbage or EOF after having already rejected a - // protocol, the dialer is most likely using `V1Lazy` and has - // optimistically settled on this protocol, so this is really a - // failed negotiation, not a protocol violation. In this case - // the dialer also raises `NegotiationError::Failed` when finally - // reading the `N/A` response. - if let ProtocolError::InvalidMessage = &err { - tracing::trace!( - target: LOG_TARGET, - "Listener: Negotiation failed with invalid \ - message after protocol rejection." - ); - return Poll::Ready(Err(NegotiationError::Failed)); - } - if let ProtocolError::IoError(e) = &err { - if e.kind() == std::io::ErrorKind::UnexpectedEof { - tracing::trace!( - target: LOG_TARGET, - "Listener: Negotiation failed with EOF \ - after protocol rejection." - ); - return Poll::Ready(Err(NegotiationError::Failed)); - } - } - } - - return Poll::Ready(Err(From::from(err))); - } - }; - - match msg { - Message::ListProtocols => { - let supported = - this.protocols.iter().map(|(_, p)| p).cloned().collect(); - let message = Message::Protocols(supported); - *this.state = State::SendMessage { - io, - message, - protocol: None, - } - } - Message::Protocol(p) => { - let protocol = this.protocols.iter().find_map(|(name, proto)| { - if &p == proto { - Some(name.clone()) - } else { - None - } - }); - - let message = if protocol.is_some() { - tracing::debug!("Listener: confirming protocol: {}", p); - Message::Protocol(p.clone()) - } else { - tracing::debug!( - "Listener: rejecting protocol: {}", - String::from_utf8_lossy(p.as_ref()) - ); - Message::NotAvailable - }; - - *this.state = State::SendMessage { - io, - message, - protocol, - }; - } - _ => return Poll::Ready(Err(ProtocolError::InvalidMessage.into())), - } - } - - State::SendMessage { - mut io, - message, - protocol, - } => { - match Pin::new(&mut io).poll_ready(cx) { - Poll::Pending => { - *this.state = State::SendMessage { - io, - message, - protocol, - }; - return Poll::Pending; - } - Poll::Ready(Ok(())) => {} - Poll::Ready(Err(err)) => return Poll::Ready(Err(From::from(err))), - } - - if let Message::NotAvailable = &message { - *this.last_sent_na = true; - } else { - *this.last_sent_na = false; - } - - if let Err(err) = Pin::new(&mut io).start_send(message) { - return Poll::Ready(Err(From::from(err))); - } - - *this.state = State::Flush { io, protocol }; - } - - State::Flush { mut io, protocol } => { - match Pin::new(&mut io).poll_flush(cx) { - Poll::Pending => { - *this.state = State::Flush { io, protocol }; - return Poll::Pending; - } - Poll::Ready(Ok(())) => { - // If a protocol has been selected, finish negotiation. - // Otherwise expect to receive another message. - match protocol { - Some(protocol) => { - tracing::debug!( - "Listener: sent confirmed protocol: {}", - String::from_utf8_lossy(protocol.as_ref()) - ); - let io = Negotiated::completed(io.into_inner()); - return Poll::Ready(Ok((protocol, io))); - } - None => *this.state = State::RecvMessage { io }, - } - } - Poll::Ready(Err(err)) => return Poll::Ready(Err(From::from(err))), - } - } - - State::Done => panic!("State::poll called after completion"), - } - } - } + type Output = Result<(N, Negotiated), NegotiationError>; + + fn poll(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll { + let this = self.project(); + + loop { + match mem::replace(this.state, State::Done) { + State::RecvHeader { mut io } => { + match io.poll_next_unpin(cx) { + Poll::Ready(Some(Ok(Message::Header(h)))) => match h { + HeaderLine::V1 => *this.state = State::SendHeader { io }, + }, + Poll::Ready(Some(Ok(_))) => + return Poll::Ready(Err(ProtocolError::InvalidMessage.into())), + Poll::Ready(Some(Err(err))) => return Poll::Ready(Err(From::from(err))), + // Treat EOF error as [`NegotiationError::Failed`], not as + // [`NegotiationError::ProtocolError`], allowing dropping or closing an I/O + // stream as a permissible way to "gracefully" fail a negotiation. + Poll::Ready(None) => return Poll::Ready(Err(NegotiationError::Failed)), + Poll::Pending => { + *this.state = State::RecvHeader { io }; + return Poll::Pending; + }, + } + }, + + State::SendHeader { mut io } => { + match Pin::new(&mut io).poll_ready(cx) { + Poll::Pending => { + *this.state = State::SendHeader { io }; + return Poll::Pending; + }, + Poll::Ready(Ok(())) => {}, + Poll::Ready(Err(err)) => return Poll::Ready(Err(From::from(err))), + } + + let msg = Message::Header(HeaderLine::V1); + if let Err(err) = Pin::new(&mut io).start_send(msg) { + return Poll::Ready(Err(From::from(err))); + } + + *this.state = State::Flush { io, protocol: None }; + }, + + State::RecvMessage { mut io } => { + let msg = match Pin::new(&mut io).poll_next(cx) { + Poll::Ready(Some(Ok(msg))) => msg, + // Treat EOF error as [`NegotiationError::Failed`], not as + // [`NegotiationError::ProtocolError`], allowing dropping or closing an I/O + // stream as a permissible way to "gracefully" fail a negotiation. + // + // This is e.g. important when a listener rejects a protocol with + // [`Message::NotAvailable`] and the dialer does not have alternative + // protocols to propose. Then the dialer will stop the negotiation and drop + // the corresponding stream. As a listener this EOF should be interpreted as + // a failed negotiation. + Poll::Ready(None) => return Poll::Ready(Err(NegotiationError::Failed)), + Poll::Pending => { + *this.state = State::RecvMessage { io }; + return Poll::Pending; + }, + Poll::Ready(Some(Err(err))) => { + if *this.last_sent_na { + // When we read garbage or EOF after having already rejected a + // protocol, the dialer is most likely using `V1Lazy` and has + // optimistically settled on this protocol, so this is really a + // failed negotiation, not a protocol violation. In this case + // the dialer also raises `NegotiationError::Failed` when finally + // reading the `N/A` response. + if let ProtocolError::InvalidMessage = &err { + tracing::trace!( + target: LOG_TARGET, + "Listener: Negotiation failed with invalid \ + message after protocol rejection." + ); + return Poll::Ready(Err(NegotiationError::Failed)); + } + if let ProtocolError::IoError(e) = &err { + if e.kind() == std::io::ErrorKind::UnexpectedEof { + tracing::trace!( + target: LOG_TARGET, + "Listener: Negotiation failed with EOF \ + after protocol rejection." + ); + return Poll::Ready(Err(NegotiationError::Failed)); + } + } + } + + return Poll::Ready(Err(From::from(err))); + }, + }; + + match msg { + Message::ListProtocols => { + let supported = + this.protocols.iter().map(|(_, p)| p).cloned().collect(); + let message = Message::Protocols(supported); + *this.state = State::SendMessage { io, message, protocol: None } + }, + Message::Protocol(p) => { + let protocol = this.protocols.iter().find_map(|(name, proto)| { + if &p == proto { + Some(name.clone()) + } else { + None + } + }); + + let message = if protocol.is_some() { + tracing::debug!("Listener: confirming protocol: {}", p); + Message::Protocol(p.clone()) + } else { + tracing::debug!( + "Listener: rejecting protocol: {}", + String::from_utf8_lossy(p.as_ref()) + ); + Message::NotAvailable + }; + + *this.state = State::SendMessage { io, message, protocol }; + }, + _ => return Poll::Ready(Err(ProtocolError::InvalidMessage.into())), + } + }, + + State::SendMessage { mut io, message, protocol } => { + match Pin::new(&mut io).poll_ready(cx) { + Poll::Pending => { + *this.state = State::SendMessage { io, message, protocol }; + return Poll::Pending; + }, + Poll::Ready(Ok(())) => {}, + Poll::Ready(Err(err)) => return Poll::Ready(Err(From::from(err))), + } + + if let Message::NotAvailable = &message { + *this.last_sent_na = true; + } else { + *this.last_sent_na = false; + } + + if let Err(err) = Pin::new(&mut io).start_send(message) { + return Poll::Ready(Err(From::from(err))); + } + + *this.state = State::Flush { io, protocol }; + }, + + State::Flush { mut io, protocol } => { + match Pin::new(&mut io).poll_flush(cx) { + Poll::Pending => { + *this.state = State::Flush { io, protocol }; + return Poll::Pending; + }, + Poll::Ready(Ok(())) => { + // If a protocol has been selected, finish negotiation. + // Otherwise expect to receive another message. + match protocol { + Some(protocol) => { + tracing::debug!( + "Listener: sent confirmed protocol: {}", + String::from_utf8_lossy(protocol.as_ref()) + ); + let io = Negotiated::completed(io.into_inner()); + return Poll::Ready(Ok((protocol, io))); + }, + None => *this.state = State::RecvMessage { io }, + } + }, + Poll::Ready(Err(err)) => return Poll::Ready(Err(From::from(err))), + } + }, + + State::Done => panic!("State::poll called after completion"), + } + } + } } /// Result of [`webrtc_listener_negotiate()`]. #[derive(Debug)] pub enum ListenerSelectResult { - /// Requested protocol is available and substream can be accepted. - Accepted { - /// Protocol that is confirmed. - protocol: ProtocolName, - - /// `multistream-select` message. - message: BytesMut, - }, - - /// Requested protocol is not available. - Rejected { - /// `multistream-select` message. - message: BytesMut, - }, + /// Requested protocol is available and substream can be accepted. + Accepted { + /// Protocol that is confirmed. + protocol: ProtocolName, + + /// `multistream-select` message. + message: BytesMut, + }, + + /// Requested protocol is not available. + Rejected { + /// `multistream-select` message. + message: BytesMut, + }, } /// Negotiate protocols for listener. @@ -349,207 +318,207 @@ pub enum ListenerSelectResult { /// locally available protocols. If a match is found, return an encoded multistream-select /// response and the negotiated protocol. If parsing fails or no match is found, return an error. pub fn webrtc_listener_negotiate( - supported_protocols: Vec, - mut payload: Bytes, + supported_protocols: Vec, + mut payload: Bytes, ) -> crate::Result { - let protocols = drain_trailing_protocols(payload)?; - let mut protocol_iter = protocols.into_iter(); - - // skip the multistream-select header because it's not part of user protocols but verify it's - // present - if protocol_iter.next() != Some(PROTO_MULTISTREAM_1_0) { - return Err(Error::NegotiationError( - error::NegotiationError::MultistreamSelectError(NegotiationError::Failed), - )); - } - - for protocol in protocol_iter { - tracing::trace!( - target: LOG_TARGET, - protocol = ?std::str::from_utf8(protocol.as_ref()), - "listener: checking protocol", - ); - - for supported in supported_protocols.iter() { - if protocol.as_ref() == supported.as_bytes() { - return Ok(ListenerSelectResult::Accepted { - protocol: supported.clone(), - message: webrtc_encode_multistream_message(std::iter::once( - Message::Protocol(protocol), - ))?, - }); - } - } - } - - tracing::trace!( - target: LOG_TARGET, - "listener: handshake rejected, no supported protocol found", - ); - - Ok(ListenerSelectResult::Rejected { - message: webrtc_encode_multistream_message(std::iter::once(Message::NotAvailable))?, - }) + let protocols = drain_trailing_protocols(payload)?; + let mut protocol_iter = protocols.into_iter(); + + // skip the multistream-select header because it's not part of user protocols but verify it's + // present + if protocol_iter.next() != Some(PROTO_MULTISTREAM_1_0) { + return Err(Error::NegotiationError(error::NegotiationError::MultistreamSelectError( + NegotiationError::Failed, + ))); + } + + for protocol in protocol_iter { + tracing::trace!( + target: LOG_TARGET, + protocol = ?std::str::from_utf8(protocol.as_ref()), + "listener: checking protocol", + ); + + for supported in supported_protocols.iter() { + if protocol.as_ref() == supported.as_bytes() { + return Ok(ListenerSelectResult::Accepted { + protocol: supported.clone(), + message: webrtc_encode_multistream_message(std::iter::once( + Message::Protocol(protocol), + ))?, + }); + } + } + } + + tracing::trace!( + target: LOG_TARGET, + "listener: handshake rejected, no supported protocol found", + ); + + Ok(ListenerSelectResult::Rejected { + message: webrtc_encode_multistream_message(std::iter::once(Message::NotAvailable))?, + }) } #[cfg(test)] mod tests { - use super::*; - use crate::error; - use bytes::BufMut; - - #[test] - fn webrtc_listener_negotiate_works() { - let local_protocols = vec![ - ProtocolName::from("/13371338/proto/1"), - ProtocolName::from("/sup/proto/1"), - ProtocolName::from("/13371338/proto/2"), - ProtocolName::from("/13371338/proto/3"), - ProtocolName::from("/13371338/proto/4"), - ]; - let message = webrtc_encode_multistream_message(vec![ - Message::Protocol(Protocol::try_from(&b"/13371338/proto/1"[..]).unwrap()), - Message::Protocol(Protocol::try_from(&b"/sup/proto/1"[..]).unwrap()), - ]) - .unwrap() - .freeze(); - - match webrtc_listener_negotiate(local_protocols, message) { - Err(error) => panic!("error received: {error:?}"), - Ok(ListenerSelectResult::Rejected { .. }) => panic!("message rejected"), - Ok(ListenerSelectResult::Accepted { protocol, message }) => { - assert_eq!(protocol, ProtocolName::from("/13371338/proto/1")); - } - } - } - - #[test] - fn invalid_message() { - let local_protocols = vec![ - ProtocolName::from("/13371338/proto/1"), - ProtocolName::from("/sup/proto/1"), - ProtocolName::from("/13371338/proto/2"), - ProtocolName::from("/13371338/proto/3"), - ProtocolName::from("/13371338/proto/4"), - ]; - // The invalid message is really two multistream-select messages inside one `WebRtcMessage`: - // 1. the multistream-select header - // 2. an "ls response" message (that does not contain another header) - // - // This is invalid for two reasons: - // 1. It is malformed. Either the header is followed by one or more `Message::Protocol` - // instances or the header is part of the "ls response". - // 2. This sequence of messages is not spec compliant. A listener receives one of the - // following on an inbound substream: - // - a multistream-select header followed by a `Message::Protocol` instance - // - a multistream-select header followed by an "ls" message (<\n>) - // - // `webrtc_listener_negotiate()` should reject this invalid message. The error can either be - // `InvalidData` because the message is malformed or `StateMismatch` because the message is - // not expected at this point in the protocol. - let message = webrtc_encode_multistream_message(std::iter::once(Message::Protocols(vec![ - Protocol::try_from(&b"/13371338/proto/1"[..]).unwrap(), - Protocol::try_from(&b"/sup/proto/1"[..]).unwrap(), - ]))) - .unwrap() - .freeze(); - - match webrtc_listener_negotiate(local_protocols, message) { - Err(error) => assert!(std::matches!( - error, - // something has gone off the rails here... - Error::NegotiationError(error::NegotiationError::ParseError( - error::ParseError::InvalidData - )), - )), - _ => panic!("invalid event"), - } - } - - #[test] - fn only_header_line_received() { - let local_protocols = vec![ - ProtocolName::from("/13371338/proto/1"), - ProtocolName::from("/sup/proto/1"), - ProtocolName::from("/13371338/proto/2"), - ProtocolName::from("/13371338/proto/3"), - ProtocolName::from("/13371338/proto/4"), - ]; - - // send only header line - let mut bytes = BytesMut::with_capacity(32); - let message = Message::Header(HeaderLine::V1); - message.encode(&mut bytes).map_err(|_| Error::InvalidData).unwrap(); - - match webrtc_listener_negotiate(local_protocols, bytes.freeze()) { - Err(error) => assert!(std::matches!( - error, - Error::NegotiationError(error::NegotiationError::ParseError( - error::ParseError::InvalidData - )), - )), - event => panic!("invalid event: {event:?}"), - } - } - - #[test] - fn header_line_missing() { - let local_protocols = vec![ - ProtocolName::from("/13371338/proto/1"), - ProtocolName::from("/sup/proto/1"), - ProtocolName::from("/13371338/proto/2"), - ProtocolName::from("/13371338/proto/3"), - ProtocolName::from("/13371338/proto/4"), - ]; - - // header line missing - let mut bytes = BytesMut::with_capacity(256); - vec![&b"/13371338/proto/1"[..], &b"/sup/proto/1"[..]] - .into_iter() - .for_each(|proto| { - bytes.put_u8((proto.len() + 1) as u8); - - Message::Protocol(Protocol::try_from(proto).unwrap()) - .encode(&mut bytes) - .unwrap(); - }); - - match webrtc_listener_negotiate(local_protocols, bytes.freeze()) { - Err(error) => assert!(std::matches!( - error, - Error::NegotiationError(error::NegotiationError::MultistreamSelectError( - NegotiationError::Failed - )) - )), - event => panic!("invalid event: {event:?}"), - } - } - - #[test] - fn protocol_not_supported() { - let mut local_protocols = vec![ - ProtocolName::from("/13371338/proto/1"), - ProtocolName::from("/sup/proto/1"), - ProtocolName::from("/13371338/proto/2"), - ProtocolName::from("/13371338/proto/3"), - ProtocolName::from("/13371338/proto/4"), - ]; - let message = webrtc_encode_multistream_message(vec![Message::Protocol( - Protocol::try_from(&b"/13371339/proto/1"[..]).unwrap(), - )]) - .unwrap() - .freeze(); - - match webrtc_listener_negotiate(local_protocols, message) { - Err(error) => panic!("error received: {error:?}"), - Ok(ListenerSelectResult::Rejected { message }) => { - assert_eq!( - message, - webrtc_encode_multistream_message(std::iter::once(Message::NotAvailable)) - .unwrap() - ); - } - Ok(ListenerSelectResult::Accepted { protocol, message }) => panic!("message accepted"), - } - } + use super::*; + use crate::error; + use bytes::BufMut; + + #[test] + fn webrtc_listener_negotiate_works() { + let local_protocols = vec![ + ProtocolName::from("/13371338/proto/1"), + ProtocolName::from("/sup/proto/1"), + ProtocolName::from("/13371338/proto/2"), + ProtocolName::from("/13371338/proto/3"), + ProtocolName::from("/13371338/proto/4"), + ]; + let message = webrtc_encode_multistream_message(vec![ + Message::Protocol(Protocol::try_from(&b"/13371338/proto/1"[..]).unwrap()), + Message::Protocol(Protocol::try_from(&b"/sup/proto/1"[..]).unwrap()), + ]) + .unwrap() + .freeze(); + + match webrtc_listener_negotiate(local_protocols, message) { + Err(error) => panic!("error received: {error:?}"), + Ok(ListenerSelectResult::Rejected { .. }) => panic!("message rejected"), + Ok(ListenerSelectResult::Accepted { protocol, message }) => { + assert_eq!(protocol, ProtocolName::from("/13371338/proto/1")); + }, + } + } + + #[test] + fn invalid_message() { + let local_protocols = vec![ + ProtocolName::from("/13371338/proto/1"), + ProtocolName::from("/sup/proto/1"), + ProtocolName::from("/13371338/proto/2"), + ProtocolName::from("/13371338/proto/3"), + ProtocolName::from("/13371338/proto/4"), + ]; + // The invalid message is really two multistream-select messages inside one `WebRtcMessage`: + // 1. the multistream-select header + // 2. an "ls response" message (that does not contain another header) + // + // This is invalid for two reasons: + // 1. It is malformed. Either the header is followed by one or more `Message::Protocol` + // instances or the header is part of the "ls response". + // 2. This sequence of messages is not spec compliant. A listener receives one of the + // following on an inbound substream: + // - a multistream-select header followed by a `Message::Protocol` instance + // - a multistream-select header followed by an "ls" message (<\n>) + // + // `webrtc_listener_negotiate()` should reject this invalid message. The error can either be + // `InvalidData` because the message is malformed or `StateMismatch` because the message is + // not expected at this point in the protocol. + let message = webrtc_encode_multistream_message(std::iter::once(Message::Protocols(vec![ + Protocol::try_from(&b"/13371338/proto/1"[..]).unwrap(), + Protocol::try_from(&b"/sup/proto/1"[..]).unwrap(), + ]))) + .unwrap() + .freeze(); + + match webrtc_listener_negotiate(local_protocols, message) { + Err(error) => assert!(std::matches!( + error, + // something has gone off the rails here... + Error::NegotiationError(error::NegotiationError::ParseError( + error::ParseError::InvalidData + )), + )), + _ => panic!("invalid event"), + } + } + + #[test] + fn only_header_line_received() { + let local_protocols = vec![ + ProtocolName::from("/13371338/proto/1"), + ProtocolName::from("/sup/proto/1"), + ProtocolName::from("/13371338/proto/2"), + ProtocolName::from("/13371338/proto/3"), + ProtocolName::from("/13371338/proto/4"), + ]; + + // send only header line + let mut bytes = BytesMut::with_capacity(32); + let message = Message::Header(HeaderLine::V1); + message.encode(&mut bytes).map_err(|_| Error::InvalidData).unwrap(); + + match webrtc_listener_negotiate(local_protocols, bytes.freeze()) { + Err(error) => assert!(std::matches!( + error, + Error::NegotiationError(error::NegotiationError::ParseError( + error::ParseError::InvalidData + )), + )), + event => panic!("invalid event: {event:?}"), + } + } + + #[test] + fn header_line_missing() { + let local_protocols = vec![ + ProtocolName::from("/13371338/proto/1"), + ProtocolName::from("/sup/proto/1"), + ProtocolName::from("/13371338/proto/2"), + ProtocolName::from("/13371338/proto/3"), + ProtocolName::from("/13371338/proto/4"), + ]; + + // header line missing + let mut bytes = BytesMut::with_capacity(256); + vec![&b"/13371338/proto/1"[..], &b"/sup/proto/1"[..]] + .into_iter() + .for_each(|proto| { + bytes.put_u8((proto.len() + 1) as u8); + + Message::Protocol(Protocol::try_from(proto).unwrap()) + .encode(&mut bytes) + .unwrap(); + }); + + match webrtc_listener_negotiate(local_protocols, bytes.freeze()) { + Err(error) => assert!(std::matches!( + error, + Error::NegotiationError(error::NegotiationError::MultistreamSelectError( + NegotiationError::Failed + )) + )), + event => panic!("invalid event: {event:?}"), + } + } + + #[test] + fn protocol_not_supported() { + let mut local_protocols = vec![ + ProtocolName::from("/13371338/proto/1"), + ProtocolName::from("/sup/proto/1"), + ProtocolName::from("/13371338/proto/2"), + ProtocolName::from("/13371338/proto/3"), + ProtocolName::from("/13371338/proto/4"), + ]; + let message = webrtc_encode_multistream_message(vec![Message::Protocol( + Protocol::try_from(&b"/13371339/proto/1"[..]).unwrap(), + )]) + .unwrap() + .freeze(); + + match webrtc_listener_negotiate(local_protocols, message) { + Err(error) => panic!("error received: {error:?}"), + Ok(ListenerSelectResult::Rejected { message }) => { + assert_eq!( + message, + webrtc_encode_multistream_message(std::iter::once(Message::NotAvailable)) + .unwrap() + ); + }, + Ok(ListenerSelectResult::Accepted { protocol, message }) => panic!("message accepted"), + } + } } diff --git a/client/litep2p/src/multistream_select/mod.rs b/client/litep2p/src/multistream_select/mod.rs index f195b1f3..c5a0e8f8 100644 --- a/client/litep2p/src/multistream_select/mod.rs +++ b/client/litep2p/src/multistream_select/mod.rs @@ -77,13 +77,13 @@ mod protocol; use crate::error::{self, ParseError}; pub use crate::multistream_select::{ - dialer_select::{dialer_select_proto, DialerSelectFuture, HandshakeResult, WebRtcDialerState}, - listener_select::{ - listener_select_proto, webrtc_listener_negotiate, ListenerSelectFuture, - ListenerSelectResult, - }, - negotiated::{Negotiated, NegotiatedComplete, NegotiationError}, - protocol::{HeaderLine, Message, Protocol, ProtocolError, PROTO_MULTISTREAM_1_0}, + dialer_select::{dialer_select_proto, DialerSelectFuture, HandshakeResult, WebRtcDialerState}, + listener_select::{ + listener_select_proto, webrtc_listener_negotiate, ListenerSelectFuture, + ListenerSelectResult, + }, + negotiated::{Negotiated, NegotiatedComplete, NegotiationError}, + protocol::{HeaderLine, Message, Protocol, ProtocolError, PROTO_MULTISTREAM_1_0}, }; use bytes::Bytes; @@ -93,107 +93,107 @@ const LOG_TARGET: &str = "litep2p::multistream-select"; /// Supported multistream-select versions. #[derive(Clone, Copy, Debug, PartialEq, Eq)] pub enum Version { - /// Version 1 of the multistream-select protocol. See [1] and [2]. - /// - /// [1]: https://github.com/libp2p/specs/blob/master/connections/README.md#protocol-negotiation - /// [2]: https://github.com/multiformats/multistream-select - V1, - /// A "lazy" variant of version 1 that is identical on the wire but whereby - /// the dialer delays flushing protocol negotiation data in order to combine - /// it with initial application data, thus performing 0-RTT negotiation. - /// - /// This strategy is only applicable for the node with the role of "dialer" - /// in the negotiation and only if the dialer supports just a single - /// application protocol. In that case the dialer immedidately "settles" - /// on that protocol, buffering the negotiation messages to be sent - /// with the first round of application protocol data (or an attempt - /// is made to read from the `Negotiated` I/O stream). - /// - /// A listener will behave identically to `V1`. This ensures interoperability with `V1`. - /// Notably, it will immediately send the multistream header as well as the protocol - /// confirmation, resulting in multiple frames being sent on the underlying transport. - /// Nevertheless, if the listener supports the protocol that the dialer optimistically - /// settled on, it can be a 0-RTT negotiation. - /// - /// > **Note**: `V1Lazy` is specific to `rust-libp2p`. The wire protocol is identical to `V1` - /// > and generally interoperable with peers only supporting `V1`. Nevertheless, there is a - /// > pitfall that is rarely encountered: When nesting multiple protocol negotiations, the - /// > listener should either be known to support all of the dialer's optimistically chosen - /// > protocols or there is must be no intermediate protocol without a payload and none of - /// > the protocol payloads must have the potential for being mistaken for a multistream-select - /// > protocol message. This avoids rare edge-cases whereby the listener may not recognize - /// > upgrade boundaries and erroneously process a request despite not supporting one of - /// > the intermediate protocols that the dialer committed to. See [1] and [2]. - /// - /// [1]: https://github.com/multiformats/go-multistream/issues/20 - /// [2]: https://github.com/libp2p/rust-libp2p/pull/1212 - V1Lazy, - // Draft: https://github.com/libp2p/specs/pull/95 - // V2, + /// Version 1 of the multistream-select protocol. See [1] and [2]. + /// + /// [1]: https://github.com/libp2p/specs/blob/master/connections/README.md#protocol-negotiation + /// [2]: https://github.com/multiformats/multistream-select + V1, + /// A "lazy" variant of version 1 that is identical on the wire but whereby + /// the dialer delays flushing protocol negotiation data in order to combine + /// it with initial application data, thus performing 0-RTT negotiation. + /// + /// This strategy is only applicable for the node with the role of "dialer" + /// in the negotiation and only if the dialer supports just a single + /// application protocol. In that case the dialer immedidately "settles" + /// on that protocol, buffering the negotiation messages to be sent + /// with the first round of application protocol data (or an attempt + /// is made to read from the `Negotiated` I/O stream). + /// + /// A listener will behave identically to `V1`. This ensures interoperability with `V1`. + /// Notably, it will immediately send the multistream header as well as the protocol + /// confirmation, resulting in multiple frames being sent on the underlying transport. + /// Nevertheless, if the listener supports the protocol that the dialer optimistically + /// settled on, it can be a 0-RTT negotiation. + /// + /// > **Note**: `V1Lazy` is specific to `rust-libp2p`. The wire protocol is identical to `V1` + /// > and generally interoperable with peers only supporting `V1`. Nevertheless, there is a + /// > pitfall that is rarely encountered: When nesting multiple protocol negotiations, the + /// > listener should either be known to support all of the dialer's optimistically chosen + /// > protocols or there is must be no intermediate protocol without a payload and none of + /// > the protocol payloads must have the potential for being mistaken for a multistream-select + /// > protocol message. This avoids rare edge-cases whereby the listener may not recognize + /// > upgrade boundaries and erroneously process a request despite not supporting one of + /// > the intermediate protocols that the dialer committed to. See [1] and [2]. + /// + /// [1]: https://github.com/multiformats/go-multistream/issues/20 + /// [2]: https://github.com/libp2p/rust-libp2p/pull/1212 + V1Lazy, + // Draft: https://github.com/libp2p/specs/pull/95 + // V2, } impl Default for Version { - fn default() -> Self { - Version::V1 - } + fn default() -> Self { + Version::V1 + } } // This function is only used in the WebRTC transport. It expects one or more multistream-select // messages in `remaining` and returns a list of protocols that were decoded from them. fn drain_trailing_protocols( - mut remaining: Bytes, + mut remaining: Bytes, ) -> Result, error::NegotiationError> { - let mut protocols = vec![]; + let mut protocols = vec![]; - loop { - if remaining.is_empty() { - break; - } + loop { + if remaining.is_empty() { + break; + } - let (len, tail) = unsigned_varint::decode::usize(&remaining).map_err(|error| { - tracing::debug!( + let (len, tail) = unsigned_varint::decode::usize(&remaining).map_err(|error| { + tracing::debug!( target: LOG_TARGET, ?error, message = ?remaining, "Failed to decode length-prefix in multistream message"); - error::NegotiationError::ParseError(ParseError::InvalidData) - })?; - - if len > tail.len() { - tracing::debug!( - target: LOG_TARGET, - message = ?tail, - length_prefix = len, - actual_length = tail.len(), - "Truncated multistream message", - ); - - return Err(error::NegotiationError::ParseError(ParseError::InvalidData)); - } - - let len_size = remaining.len() - tail.len(); - let payload = remaining.slice(len_size..len_size + len); - let res = Message::decode(payload); - - match res { - Ok(Message::Header(HeaderLine::V1)) => protocols.push(PROTO_MULTISTREAM_1_0), - Ok(Message::Protocol(protocol)) => protocols.push(protocol), - Ok(Message::Protocols(_)) => - return Err(error::NegotiationError::ParseError(ParseError::InvalidData)), - Err(error) => { - tracing::debug!( - target: LOG_TARGET, - ?error, - message = ?tail[..len], - "Failed to decode multistream message", - ); - return Err(error::NegotiationError::ParseError(ParseError::InvalidData)); - } - _ => return Err(error::NegotiationError::StateMismatch), - } - - remaining = remaining.slice(len_size + len..); - } - - Ok(protocols) + error::NegotiationError::ParseError(ParseError::InvalidData) + })?; + + if len > tail.len() { + tracing::debug!( + target: LOG_TARGET, + message = ?tail, + length_prefix = len, + actual_length = tail.len(), + "Truncated multistream message", + ); + + return Err(error::NegotiationError::ParseError(ParseError::InvalidData)); + } + + let len_size = remaining.len() - tail.len(); + let payload = remaining.slice(len_size..len_size + len); + let res = Message::decode(payload); + + match res { + Ok(Message::Header(HeaderLine::V1)) => protocols.push(PROTO_MULTISTREAM_1_0), + Ok(Message::Protocol(protocol)) => protocols.push(protocol), + Ok(Message::Protocols(_)) => + return Err(error::NegotiationError::ParseError(ParseError::InvalidData)), + Err(error) => { + tracing::debug!( + target: LOG_TARGET, + ?error, + message = ?tail[..len], + "Failed to decode multistream message", + ); + return Err(error::NegotiationError::ParseError(ParseError::InvalidData)); + }, + _ => return Err(error::NegotiationError::StateMismatch), + } + + remaining = remaining.slice(len_size + len..); + } + + Ok(protocols) } diff --git a/client/litep2p/src/multistream_select/negotiated.rs b/client/litep2p/src/multistream_select/negotiated.rs index e4609de2..8098d5e2 100644 --- a/client/litep2p/src/multistream_select/negotiated.rs +++ b/client/litep2p/src/multistream_select/negotiated.rs @@ -19,20 +19,20 @@ // DEALINGS IN THE SOFTWARE. use crate::multistream_select::protocol::{ - HeaderLine, Message, MessageReader, Protocol, ProtocolError, + HeaderLine, Message, MessageReader, Protocol, ProtocolError, }; use futures::{ - io::{IoSlice, IoSliceMut}, - prelude::*, - ready, + io::{IoSlice, IoSliceMut}, + prelude::*, + ready, }; use pin_project::pin_project; use std::{ - error::Error, - fmt, io, mem, - pin::Pin, - task::{Context, Poll}, + error::Error, + fmt, io, mem, + pin::Pin, + task::{Context, Poll}, }; const LOG_TARGET: &str = "litep2p::multistream-select"; @@ -51,325 +51,303 @@ const LOG_TARGET: &str = "litep2p::multistream-select"; #[pin_project] #[derive(Debug)] pub struct Negotiated { - #[pin] - state: State, + #[pin] + state: State, } /// A `Future` that waits on the completion of protocol negotiation. #[derive(Debug)] pub struct NegotiatedComplete { - inner: Option>, + inner: Option>, } impl Future for NegotiatedComplete where - // `Unpin` is required not because of - // implementation details but because we produce - // the `Negotiated` as the output of the - // future. - TInner: AsyncRead + AsyncWrite + Unpin, + // `Unpin` is required not because of + // implementation details but because we produce + // the `Negotiated` as the output of the + // future. + TInner: AsyncRead + AsyncWrite + Unpin, { - type Output = Result, NegotiationError>; - - fn poll(mut self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll { - let mut io = self.inner.take().expect("NegotiatedFuture called after completion."); - match Negotiated::poll(Pin::new(&mut io), cx) { - Poll::Pending => { - self.inner = Some(io); - Poll::Pending - } - Poll::Ready(Ok(())) => Poll::Ready(Ok(io)), - Poll::Ready(Err(err)) => { - self.inner = Some(io); - Poll::Ready(Err(err)) - } - } - } + type Output = Result, NegotiationError>; + + fn poll(mut self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll { + let mut io = self.inner.take().expect("NegotiatedFuture called after completion."); + match Negotiated::poll(Pin::new(&mut io), cx) { + Poll::Pending => { + self.inner = Some(io); + Poll::Pending + }, + Poll::Ready(Ok(())) => Poll::Ready(Ok(io)), + Poll::Ready(Err(err)) => { + self.inner = Some(io); + Poll::Ready(Err(err)) + }, + } + } } impl Negotiated { - /// Creates a `Negotiated` in state [`State::Completed`]. - pub(crate) fn completed(io: TInner) -> Self { - Negotiated { - state: State::Completed { io }, - } - } - - /// Creates a `Negotiated` in state [`State::Expecting`] that is still - /// expecting confirmation of the given `protocol`. - pub(crate) fn expecting( - io: MessageReader, - protocol: Protocol, - header: Option, - ) -> Self { - Negotiated { - state: State::Expecting { - io, - protocol, - header, - }, - } - } - - pub fn inner(self) -> TInner { - match self.state { - State::Completed { io } => io, - _ => panic!("stream is not negotiated"), - } - } - - /// Polls the `Negotiated` for completion. - fn poll(mut self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll> - where - TInner: AsyncRead + AsyncWrite + Unpin, - { - // Flush any pending negotiation data. - match self.as_mut().poll_flush(cx) { - Poll::Ready(Ok(())) => {} - Poll::Pending => return Poll::Pending, - Poll::Ready(Err(e)) => { - // If the remote closed the stream, it is important to still - // continue reading the data that was sent, if any. - if e.kind() != io::ErrorKind::WriteZero { - return Poll::Ready(Err(e.into())); - } - } - } - - let mut this = self.project(); - - if let StateProj::Completed { .. } = this.state.as_mut().project() { - return Poll::Ready(Ok(())); - } - - // Read outstanding protocol negotiation messages. - loop { - match mem::replace(&mut *this.state, State::Invalid) { - State::Expecting { - mut io, - header, - protocol, - } => { - let msg = match Pin::new(&mut io).poll_next(cx)? { - Poll::Ready(Some(msg)) => msg, - Poll::Pending => { - *this.state = State::Expecting { - io, - header, - protocol, - }; - return Poll::Pending; - } - Poll::Ready(None) => { - return Poll::Ready(Err(ProtocolError::IoError( - io::ErrorKind::UnexpectedEof.into(), - ) - .into())); - } - }; - - if let Message::Header(h) = &msg { - if Some(h) == header.as_ref() { - *this.state = State::Expecting { - io, - protocol, - header: None, - }; - continue; - } else { - // If we received a header message but it doesn't match the expected - // one, or we have already received the message return an error. - return Poll::Ready(Err(ProtocolError::InvalidMessage.into())); - } - } - - if let Message::Protocol(p) = &msg { - if p.as_ref() == protocol.as_ref() { - tracing::debug!( - target: LOG_TARGET, - "Negotiated: Received confirmation for protocol: {}", - p - ); - *this.state = State::Completed { - io: io.into_inner(), - }; - return Poll::Ready(Ok(())); - } - } - - return Poll::Ready(Err(NegotiationError::Failed)); - } - - _ => panic!("Negotiated: Invalid state"), - } - } - } - - /// Returns a [`NegotiatedComplete`] future that waits for protocol - /// negotiation to complete. - pub fn complete(self) -> NegotiatedComplete { - NegotiatedComplete { inner: Some(self) } - } + /// Creates a `Negotiated` in state [`State::Completed`]. + pub(crate) fn completed(io: TInner) -> Self { + Negotiated { state: State::Completed { io } } + } + + /// Creates a `Negotiated` in state [`State::Expecting`] that is still + /// expecting confirmation of the given `protocol`. + pub(crate) fn expecting( + io: MessageReader, + protocol: Protocol, + header: Option, + ) -> Self { + Negotiated { state: State::Expecting { io, protocol, header } } + } + + pub fn inner(self) -> TInner { + match self.state { + State::Completed { io } => io, + _ => panic!("stream is not negotiated"), + } + } + + /// Polls the `Negotiated` for completion. + fn poll(mut self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll> + where + TInner: AsyncRead + AsyncWrite + Unpin, + { + // Flush any pending negotiation data. + match self.as_mut().poll_flush(cx) { + Poll::Ready(Ok(())) => {}, + Poll::Pending => return Poll::Pending, + Poll::Ready(Err(e)) => { + // If the remote closed the stream, it is important to still + // continue reading the data that was sent, if any. + if e.kind() != io::ErrorKind::WriteZero { + return Poll::Ready(Err(e.into())); + } + }, + } + + let mut this = self.project(); + + if let StateProj::Completed { .. } = this.state.as_mut().project() { + return Poll::Ready(Ok(())); + } + + // Read outstanding protocol negotiation messages. + loop { + match mem::replace(&mut *this.state, State::Invalid) { + State::Expecting { mut io, header, protocol } => { + let msg = match Pin::new(&mut io).poll_next(cx)? { + Poll::Ready(Some(msg)) => msg, + Poll::Pending => { + *this.state = State::Expecting { io, header, protocol }; + return Poll::Pending; + }, + Poll::Ready(None) => { + return Poll::Ready(Err(ProtocolError::IoError( + io::ErrorKind::UnexpectedEof.into(), + ) + .into())); + }, + }; + + if let Message::Header(h) = &msg { + if Some(h) == header.as_ref() { + *this.state = State::Expecting { io, protocol, header: None }; + continue; + } else { + // If we received a header message but it doesn't match the expected + // one, or we have already received the message return an error. + return Poll::Ready(Err(ProtocolError::InvalidMessage.into())); + } + } + + if let Message::Protocol(p) = &msg { + if p.as_ref() == protocol.as_ref() { + tracing::debug!( + target: LOG_TARGET, + "Negotiated: Received confirmation for protocol: {}", + p + ); + *this.state = State::Completed { io: io.into_inner() }; + return Poll::Ready(Ok(())); + } + } + + return Poll::Ready(Err(NegotiationError::Failed)); + }, + + _ => panic!("Negotiated: Invalid state"), + } + } + } + + /// Returns a [`NegotiatedComplete`] future that waits for protocol + /// negotiation to complete. + pub fn complete(self) -> NegotiatedComplete { + NegotiatedComplete { inner: Some(self) } + } } /// The states of a `Negotiated` I/O stream. #[pin_project(project = StateProj)] #[derive(Debug)] enum State { - /// In this state, a `Negotiated` is still expecting to - /// receive confirmation of the protocol it has optimistically - /// settled on. - Expecting { - /// The underlying I/O stream. - #[pin] - io: MessageReader, - /// The expected negotiation header/preamble (i.e. multistream-select version), - /// if one is still expected to be received. - header: Option, - /// The expected application protocol (i.e. name and version). - protocol: Protocol, - }, - - /// In this state, a protocol has been agreed upon and I/O - /// on the underlying stream can commence. - Completed { - #[pin] - io: R, - }, - - /// Temporary state while moving the `io` resource from - /// `Expecting` to `Completed`. - Invalid, + /// In this state, a `Negotiated` is still expecting to + /// receive confirmation of the protocol it has optimistically + /// settled on. + Expecting { + /// The underlying I/O stream. + #[pin] + io: MessageReader, + /// The expected negotiation header/preamble (i.e. multistream-select version), + /// if one is still expected to be received. + header: Option, + /// The expected application protocol (i.e. name and version). + protocol: Protocol, + }, + + /// In this state, a protocol has been agreed upon and I/O + /// on the underlying stream can commence. + Completed { + #[pin] + io: R, + }, + + /// Temporary state while moving the `io` resource from + /// `Expecting` to `Completed`. + Invalid, } impl AsyncRead for Negotiated where - TInner: AsyncRead + AsyncWrite + Unpin, + TInner: AsyncRead + AsyncWrite + Unpin, { - fn poll_read( - mut self: Pin<&mut Self>, - cx: &mut Context<'_>, - buf: &mut [u8], - ) -> Poll> { - loop { - if let StateProj::Completed { io } = self.as_mut().project().state.project() { - // If protocol negotiation is complete, commence with reading. - return io.poll_read(cx, buf); - } - - // Poll the `Negotiated`, driving protocol negotiation to completion, - // including flushing of any remaining data. - match self.as_mut().poll(cx) { - Poll::Ready(Ok(())) => {} - Poll::Pending => return Poll::Pending, - Poll::Ready(Err(err)) => return Poll::Ready(Err(From::from(err))), - } - } - } - - fn poll_read_vectored( - mut self: Pin<&mut Self>, - cx: &mut Context<'_>, - bufs: &mut [IoSliceMut<'_>], - ) -> Poll> { - loop { - if let StateProj::Completed { io } = self.as_mut().project().state.project() { - // If protocol negotiation is complete, commence with reading. - return io.poll_read_vectored(cx, bufs); - } - - // Poll the `Negotiated`, driving protocol negotiation to completion, - // including flushing of any remaining data. - match self.as_mut().poll(cx) { - Poll::Ready(Ok(())) => {} - Poll::Pending => return Poll::Pending, - Poll::Ready(Err(err)) => return Poll::Ready(Err(From::from(err))), - } - } - } + fn poll_read( + mut self: Pin<&mut Self>, + cx: &mut Context<'_>, + buf: &mut [u8], + ) -> Poll> { + loop { + if let StateProj::Completed { io } = self.as_mut().project().state.project() { + // If protocol negotiation is complete, commence with reading. + return io.poll_read(cx, buf); + } + + // Poll the `Negotiated`, driving protocol negotiation to completion, + // including flushing of any remaining data. + match self.as_mut().poll(cx) { + Poll::Ready(Ok(())) => {}, + Poll::Pending => return Poll::Pending, + Poll::Ready(Err(err)) => return Poll::Ready(Err(From::from(err))), + } + } + } + + fn poll_read_vectored( + mut self: Pin<&mut Self>, + cx: &mut Context<'_>, + bufs: &mut [IoSliceMut<'_>], + ) -> Poll> { + loop { + if let StateProj::Completed { io } = self.as_mut().project().state.project() { + // If protocol negotiation is complete, commence with reading. + return io.poll_read_vectored(cx, bufs); + } + + // Poll the `Negotiated`, driving protocol negotiation to completion, + // including flushing of any remaining data. + match self.as_mut().poll(cx) { + Poll::Ready(Ok(())) => {}, + Poll::Pending => return Poll::Pending, + Poll::Ready(Err(err)) => return Poll::Ready(Err(From::from(err))), + } + } + } } impl AsyncWrite for Negotiated where - TInner: AsyncWrite + AsyncRead + Unpin, + TInner: AsyncWrite + AsyncRead + Unpin, { - fn poll_write( - self: Pin<&mut Self>, - cx: &mut Context<'_>, - buf: &[u8], - ) -> Poll> { - match self.project().state.project() { - StateProj::Completed { io } => io.poll_write(cx, buf), - StateProj::Expecting { io, .. } => io.poll_write(cx, buf), - StateProj::Invalid => panic!("Negotiated: Invalid state"), - } - } - - fn poll_flush(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll> { - match self.project().state.project() { - StateProj::Completed { io } => io.poll_flush(cx), - StateProj::Expecting { io, .. } => io.poll_flush(cx), - StateProj::Invalid => panic!("Negotiated: Invalid state"), - } - } - - fn poll_close(mut self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll> { - // Ensure all data has been flushed, including optimistic multistream-select messages. - ready!(self.as_mut().poll_flush(cx).map_err(Into::::into)?); - - // Continue with the shutdown of the underlying I/O stream. - match self.project().state.project() { - StateProj::Completed { io, .. } => io.poll_close(cx), - StateProj::Expecting { io, .. } => { - let close_poll = io.poll_close(cx); - if let Poll::Ready(Ok(())) = close_poll { - tracing::debug!( - target: LOG_TARGET, - "Stream closed. Confirmation from remote for optimstic protocol negotiation still pending." - ); - } - close_poll - } - StateProj::Invalid => panic!("Negotiated: Invalid state"), - } - } - - fn poll_write_vectored( - self: Pin<&mut Self>, - cx: &mut Context<'_>, - bufs: &[IoSlice<'_>], - ) -> Poll> { - match self.project().state.project() { - StateProj::Completed { io } => io.poll_write_vectored(cx, bufs), - StateProj::Expecting { io, .. } => io.poll_write_vectored(cx, bufs), - StateProj::Invalid => panic!("Negotiated: Invalid state"), - } - } + fn poll_write( + self: Pin<&mut Self>, + cx: &mut Context<'_>, + buf: &[u8], + ) -> Poll> { + match self.project().state.project() { + StateProj::Completed { io } => io.poll_write(cx, buf), + StateProj::Expecting { io, .. } => io.poll_write(cx, buf), + StateProj::Invalid => panic!("Negotiated: Invalid state"), + } + } + + fn poll_flush(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll> { + match self.project().state.project() { + StateProj::Completed { io } => io.poll_flush(cx), + StateProj::Expecting { io, .. } => io.poll_flush(cx), + StateProj::Invalid => panic!("Negotiated: Invalid state"), + } + } + + fn poll_close(mut self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll> { + // Ensure all data has been flushed, including optimistic multistream-select messages. + ready!(self.as_mut().poll_flush(cx).map_err(Into::::into)?); + + // Continue with the shutdown of the underlying I/O stream. + match self.project().state.project() { + StateProj::Completed { io, .. } => io.poll_close(cx), + StateProj::Expecting { io, .. } => { + let close_poll = io.poll_close(cx); + if let Poll::Ready(Ok(())) = close_poll { + tracing::debug!( + target: LOG_TARGET, + "Stream closed. Confirmation from remote for optimstic protocol negotiation still pending." + ); + } + close_poll + }, + StateProj::Invalid => panic!("Negotiated: Invalid state"), + } + } + + fn poll_write_vectored( + self: Pin<&mut Self>, + cx: &mut Context<'_>, + bufs: &[IoSlice<'_>], + ) -> Poll> { + match self.project().state.project() { + StateProj::Completed { io } => io.poll_write_vectored(cx, bufs), + StateProj::Expecting { io, .. } => io.poll_write_vectored(cx, bufs), + StateProj::Invalid => panic!("Negotiated: Invalid state"), + } + } } /// Error that can happen when negotiating a protocol with the remote. #[derive(Debug, thiserror::Error, PartialEq)] pub enum NegotiationError { - /// A protocol error occurred during the negotiation. - #[error("A protocol error occurred during the negotiation: `{0:?}`")] - ProtocolError(#[from] ProtocolError), + /// A protocol error occurred during the negotiation. + #[error("A protocol error occurred during the negotiation: `{0:?}`")] + ProtocolError(#[from] ProtocolError), - /// Protocol negotiation failed because no protocol could be agreed upon. - #[error("Protocol negotiation failed.")] - Failed, + /// Protocol negotiation failed because no protocol could be agreed upon. + #[error("Protocol negotiation failed.")] + Failed, } impl From for NegotiationError { - fn from(err: io::Error) -> NegotiationError { - ProtocolError::from(err).into() - } + fn from(err: io::Error) -> NegotiationError { + ProtocolError::from(err).into() + } } impl From for io::Error { - fn from(err: NegotiationError) -> io::Error { - if let NegotiationError::ProtocolError(e) = err { - return e.into(); - } - io::Error::other(err) - } + fn from(err: NegotiationError) -> io::Error { + if let NegotiationError::ProtocolError(e) = err { + return e.into(); + } + io::Error::other(err) + } } diff --git a/client/litep2p/src/multistream_select/protocol.rs b/client/litep2p/src/multistream_select/protocol.rs index 71775df9..5b398cf9 100644 --- a/client/litep2p/src/multistream_select/protocol.rs +++ b/client/litep2p/src/multistream_select/protocol.rs @@ -26,22 +26,22 @@ //! `MessageReader`. use crate::{ - codec::unsigned_varint::UnsignedVarint, - error::Error as Litep2pError, - multistream_select::{ - length_delimited::{LengthDelimited, LengthDelimitedReader}, - Version, - }, + codec::unsigned_varint::UnsignedVarint, + error::Error as Litep2pError, + multistream_select::{ + length_delimited::{LengthDelimited, LengthDelimitedReader}, + Version, + }, }; use bytes::{BufMut, Bytes, BytesMut}; use futures::{io::IoSlice, prelude::*, ready}; use std::{ - convert::TryFrom, - error::Error, - fmt, io, - pin::Pin, - task::{Context, Poll}, + convert::TryFrom, + error::Error, + fmt, io, + pin::Pin, + task::{Context, Poll}, }; use unsigned_varint as uvi; @@ -64,16 +64,16 @@ const LOG_TARGET: &str = "litep2p::multistream-select"; /// Every [`Version`] has a corresponding header line. #[derive(Copy, Clone, Debug, PartialEq, Eq)] pub enum HeaderLine { - /// The `/multistream/1.0.0` header line. - V1, + /// The `/multistream/1.0.0` header line. + V1, } impl From for HeaderLine { - fn from(v: Version) -> HeaderLine { - match v { - Version::V1 | Version::V1Lazy => HeaderLine::V1, - } - } + fn from(v: Version) -> HeaderLine { + match v { + Version::V1 | Version::V1Lazy => HeaderLine::V1, + } + } } /// A protocol (name) exchanged during protocol negotiation. @@ -81,34 +81,34 @@ impl From for HeaderLine { pub struct Protocol(Bytes); impl AsRef<[u8]> for Protocol { - fn as_ref(&self) -> &[u8] { - self.0.as_ref() - } + fn as_ref(&self) -> &[u8] { + self.0.as_ref() + } } impl TryFrom for Protocol { - type Error = ProtocolError; - - fn try_from(value: Bytes) -> Result { - if !value.as_ref().starts_with(b"/") { - return Err(ProtocolError::InvalidProtocol); - } - Ok(Protocol(value)) - } + type Error = ProtocolError; + + fn try_from(value: Bytes) -> Result { + if !value.as_ref().starts_with(b"/") { + return Err(ProtocolError::InvalidProtocol); + } + Ok(Protocol(value)) + } } impl TryFrom<&[u8]> for Protocol { - type Error = ProtocolError; + type Error = ProtocolError; - fn try_from(value: &[u8]) -> Result { - Self::try_from(Bytes::copy_from_slice(value)) - } + fn try_from(value: &[u8]) -> Result { + Self::try_from(Bytes::copy_from_slice(value)) + } } impl fmt::Display for Protocol { - fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { - write!(f, "{}", String::from_utf8_lossy(&self.0)) - } + fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { + write!(f, "{}", String::from_utf8_lossy(&self.0)) + } } /// A multistream-select protocol message. @@ -117,115 +117,115 @@ impl fmt::Display for Protocol { /// of agreeing on a application-layer protocol to use on an I/O stream. #[derive(Debug, Clone, PartialEq, Eq)] pub enum Message { - /// A header message identifies the multistream-select protocol - /// that the sender wishes to speak. - Header(HeaderLine), - /// A protocol message identifies a protocol request or acknowledgement. - Protocol(Protocol), - /// A message through which a peer requests the complete list of - /// supported protocols from the remote. - ListProtocols, - /// A message listing all supported protocols of a peer. - Protocols(Vec), - /// A message signaling that a requested protocol is not available. - NotAvailable, + /// A header message identifies the multistream-select protocol + /// that the sender wishes to speak. + Header(HeaderLine), + /// A protocol message identifies a protocol request or acknowledgement. + Protocol(Protocol), + /// A message through which a peer requests the complete list of + /// supported protocols from the remote. + ListProtocols, + /// A message listing all supported protocols of a peer. + Protocols(Vec), + /// A message signaling that a requested protocol is not available. + NotAvailable, } impl Message { - /// Encodes a `Message` into its byte representation. - pub fn encode(&self, dest: &mut BytesMut) -> Result<(), ProtocolError> { - match self { - Message::Header(HeaderLine::V1) => { - dest.reserve(MSG_MULTISTREAM_1_0.len()); - dest.put(MSG_MULTISTREAM_1_0); - Ok(()) - } - Message::Protocol(p) => { - let len = p.0.as_ref().len() + 1; // + 1 for \n - dest.reserve(len); - dest.put(p.0.as_ref()); - dest.put_u8(b'\n'); - Ok(()) - } - Message::ListProtocols => { - dest.reserve(MSG_LS.len()); - dest.put(MSG_LS); - Ok(()) - } - Message::Protocols(ps) => { - let mut buf = uvi::encode::usize_buffer(); - let mut encoded = Vec::with_capacity(ps.len()); - for p in ps { - encoded.extend(uvi::encode::usize(p.0.as_ref().len() + 1, &mut buf)); // +1 for '\n' - encoded.extend_from_slice(p.0.as_ref()); - encoded.push(b'\n') - } - encoded.push(b'\n'); - dest.reserve(encoded.len()); - dest.put(encoded.as_ref()); - Ok(()) - } - Message::NotAvailable => { - dest.reserve(MSG_PROTOCOL_NA.len()); - dest.put(MSG_PROTOCOL_NA); - Ok(()) - } - } - } - - /// Decodes a `Message` from its byte representation. - pub fn decode(mut msg: Bytes) -> Result { - if msg == MSG_MULTISTREAM_1_0 { - return Ok(Message::Header(HeaderLine::V1)); - } - - if msg == MSG_PROTOCOL_NA { - return Ok(Message::NotAvailable); - } - - if msg == MSG_LS { - return Ok(Message::ListProtocols); - } - - // If it starts with a `/`, ends with a line feed without any - // other line feeds in-between, it must be a protocol name. - if msg.first() == Some(&b'/') - && msg.last() == Some(&b'\n') - && !msg[..msg.len() - 1].contains(&b'\n') - { - let p = Protocol::try_from(msg.split_to(msg.len() - 1))?; - return Ok(Message::Protocol(p)); - } - - // At this point, it must be an `ls` response, i.e. one or more - // length-prefixed, newline-delimited protocol names. - let mut protocols = Vec::new(); - let mut remaining: &[u8] = &msg; - loop { - // A well-formed message must be terminated with a newline. - if remaining == [b'\n'] { - break; - } else if protocols.len() == MAX_PROTOCOLS { - return Err(ProtocolError::TooManyProtocols); - } - - // Decode the length of the next protocol name and check that - // it ends with a line feed. - let (len, tail) = uvi::decode::usize(remaining)?; - if len == 0 || len > tail.len() || tail[len - 1] != b'\n' { - return Err(ProtocolError::InvalidMessage); - } - - // Parse the protocol name. - let p = Protocol::try_from(Bytes::copy_from_slice(&tail[..len - 1]))?; - protocols.push(p); - - // Skip ahead to the next protocol. - remaining = &tail[len..]; - } - - Ok(Message::Protocols(protocols)) - } + /// Encodes a `Message` into its byte representation. + pub fn encode(&self, dest: &mut BytesMut) -> Result<(), ProtocolError> { + match self { + Message::Header(HeaderLine::V1) => { + dest.reserve(MSG_MULTISTREAM_1_0.len()); + dest.put(MSG_MULTISTREAM_1_0); + Ok(()) + }, + Message::Protocol(p) => { + let len = p.0.as_ref().len() + 1; // + 1 for \n + dest.reserve(len); + dest.put(p.0.as_ref()); + dest.put_u8(b'\n'); + Ok(()) + }, + Message::ListProtocols => { + dest.reserve(MSG_LS.len()); + dest.put(MSG_LS); + Ok(()) + }, + Message::Protocols(ps) => { + let mut buf = uvi::encode::usize_buffer(); + let mut encoded = Vec::with_capacity(ps.len()); + for p in ps { + encoded.extend(uvi::encode::usize(p.0.as_ref().len() + 1, &mut buf)); // +1 for '\n' + encoded.extend_from_slice(p.0.as_ref()); + encoded.push(b'\n') + } + encoded.push(b'\n'); + dest.reserve(encoded.len()); + dest.put(encoded.as_ref()); + Ok(()) + }, + Message::NotAvailable => { + dest.reserve(MSG_PROTOCOL_NA.len()); + dest.put(MSG_PROTOCOL_NA); + Ok(()) + }, + } + } + + /// Decodes a `Message` from its byte representation. + pub fn decode(mut msg: Bytes) -> Result { + if msg == MSG_MULTISTREAM_1_0 { + return Ok(Message::Header(HeaderLine::V1)); + } + + if msg == MSG_PROTOCOL_NA { + return Ok(Message::NotAvailable); + } + + if msg == MSG_LS { + return Ok(Message::ListProtocols); + } + + // If it starts with a `/`, ends with a line feed without any + // other line feeds in-between, it must be a protocol name. + if msg.first() == Some(&b'/') && + msg.last() == Some(&b'\n') && + !msg[..msg.len() - 1].contains(&b'\n') + { + let p = Protocol::try_from(msg.split_to(msg.len() - 1))?; + return Ok(Message::Protocol(p)); + } + + // At this point, it must be an `ls` response, i.e. one or more + // length-prefixed, newline-delimited protocol names. + let mut protocols = Vec::new(); + let mut remaining: &[u8] = &msg; + loop { + // A well-formed message must be terminated with a newline. + if remaining == [b'\n'] { + break; + } else if protocols.len() == MAX_PROTOCOLS { + return Err(ProtocolError::TooManyProtocols); + } + + // Decode the length of the next protocol name and check that + // it ends with a line feed. + let (len, tail) = uvi::decode::usize(remaining)?; + if len == 0 || len > tail.len() || tail[len - 1] != b'\n' { + return Err(ProtocolError::InvalidMessage); + } + + // Parse the protocol name. + let p = Protocol::try_from(Bytes::copy_from_slice(&tail[..len - 1]))?; + protocols.push(p); + + // Skip ahead to the next protocol. + remaining = &tail[len..]; + } + + Ok(Message::Protocols(protocols)) + } } /// Create `multistream-select` message from an iterator of `Message`s. @@ -235,109 +235,105 @@ impl Message { /// This implementation may not be compliant with the multistream-select protocol spec. /// The only purpose of this was to get the `multistream-select` protocol working with smoldot. pub fn webrtc_encode_multistream_message( - messages: impl IntoIterator, + messages: impl IntoIterator, ) -> crate::Result { - // encode `/multistream-select/1.0.0` header - let mut bytes = BytesMut::with_capacity(32); - let message = Message::Header(HeaderLine::V1); - message.encode(&mut bytes).map_err(|_| Litep2pError::InvalidData)?; - let mut header = UnsignedVarint::encode(bytes)?; - - // encode each message - for message in messages { - let mut proto_bytes = BytesMut::with_capacity(256); - message.encode(&mut proto_bytes).map_err(|_| Litep2pError::InvalidData)?; - let mut proto_bytes = UnsignedVarint::encode(proto_bytes)?; - header.append(&mut proto_bytes); - } - - Ok(BytesMut::from(&header[..])) + // encode `/multistream-select/1.0.0` header + let mut bytes = BytesMut::with_capacity(32); + let message = Message::Header(HeaderLine::V1); + message.encode(&mut bytes).map_err(|_| Litep2pError::InvalidData)?; + let mut header = UnsignedVarint::encode(bytes)?; + + // encode each message + for message in messages { + let mut proto_bytes = BytesMut::with_capacity(256); + message.encode(&mut proto_bytes).map_err(|_| Litep2pError::InvalidData)?; + let mut proto_bytes = UnsignedVarint::encode(proto_bytes)?; + header.append(&mut proto_bytes); + } + + Ok(BytesMut::from(&header[..])) } /// A `MessageIO` implements a [`Stream`] and [`Sink`] of [`Message`]s. #[pin_project::pin_project] pub struct MessageIO { - #[pin] - inner: LengthDelimited, + #[pin] + inner: LengthDelimited, } impl MessageIO { - /// Constructs a new `MessageIO` resource wrapping the given I/O stream. - pub fn new(inner: R) -> MessageIO - where - R: AsyncRead + AsyncWrite, - { - Self { - inner: LengthDelimited::new(inner), - } - } - - /// Converts the [`MessageIO`] into a [`MessageReader`], dropping the - /// [`Message`]-oriented `Sink` in favour of direct `AsyncWrite` access - /// to the underlying I/O stream. - /// - /// This is typically done if further negotiation messages are expected to be - /// received but no more messages are written, allowing the writing of - /// follow-up protocol data to commence. - pub fn into_reader(self) -> MessageReader { - MessageReader { - inner: self.inner.into_reader(), - } - } - - /// Drops the [`MessageIO`] resource, yielding the underlying I/O stream. - /// - /// # Panics - /// - /// Panics if the read buffer or write buffer is not empty, meaning that an incoming - /// protocol negotiation frame has been partially read or an outgoing frame - /// has not yet been flushed. The read buffer is guaranteed to be empty whenever - /// `MessageIO::poll` returned a message. The write buffer is guaranteed to be empty - /// when the sink has been flushed. - pub fn into_inner(self) -> R { - self.inner.into_inner() - } + /// Constructs a new `MessageIO` resource wrapping the given I/O stream. + pub fn new(inner: R) -> MessageIO + where + R: AsyncRead + AsyncWrite, + { + Self { inner: LengthDelimited::new(inner) } + } + + /// Converts the [`MessageIO`] into a [`MessageReader`], dropping the + /// [`Message`]-oriented `Sink` in favour of direct `AsyncWrite` access + /// to the underlying I/O stream. + /// + /// This is typically done if further negotiation messages are expected to be + /// received but no more messages are written, allowing the writing of + /// follow-up protocol data to commence. + pub fn into_reader(self) -> MessageReader { + MessageReader { inner: self.inner.into_reader() } + } + + /// Drops the [`MessageIO`] resource, yielding the underlying I/O stream. + /// + /// # Panics + /// + /// Panics if the read buffer or write buffer is not empty, meaning that an incoming + /// protocol negotiation frame has been partially read or an outgoing frame + /// has not yet been flushed. The read buffer is guaranteed to be empty whenever + /// `MessageIO::poll` returned a message. The write buffer is guaranteed to be empty + /// when the sink has been flushed. + pub fn into_inner(self) -> R { + self.inner.into_inner() + } } impl Sink for MessageIO where - R: AsyncWrite, + R: AsyncWrite, { - type Error = ProtocolError; + type Error = ProtocolError; - fn poll_ready(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll> { - self.project().inner.poll_ready(cx).map_err(From::from) - } + fn poll_ready(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll> { + self.project().inner.poll_ready(cx).map_err(From::from) + } - fn start_send(self: Pin<&mut Self>, item: Message) -> Result<(), Self::Error> { - let mut buf = BytesMut::new(); - item.encode(&mut buf)?; - self.project().inner.start_send(buf.freeze()).map_err(From::from) - } + fn start_send(self: Pin<&mut Self>, item: Message) -> Result<(), Self::Error> { + let mut buf = BytesMut::new(); + item.encode(&mut buf)?; + self.project().inner.start_send(buf.freeze()).map_err(From::from) + } - fn poll_flush(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll> { - self.project().inner.poll_flush(cx).map_err(From::from) - } + fn poll_flush(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll> { + self.project().inner.poll_flush(cx).map_err(From::from) + } - fn poll_close(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll> { - self.project().inner.poll_close(cx).map_err(From::from) - } + fn poll_close(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll> { + self.project().inner.poll_close(cx).map_err(From::from) + } } impl Stream for MessageIO where - R: AsyncRead, + R: AsyncRead, { - type Item = Result; - - fn poll_next(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll> { - match poll_stream(self.project().inner, cx) { - Poll::Pending => Poll::Pending, - Poll::Ready(None) => Poll::Ready(None), - Poll::Ready(Some(Ok(m))) => Poll::Ready(Some(Ok(m))), - Poll::Ready(Some(Err(err))) => Poll::Ready(Some(Err(err))), - } - } + type Item = Result; + + fn poll_next(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll> { + match poll_stream(self.project().inner, cx) { + Poll::Pending => Poll::Pending, + Poll::Ready(None) => Poll::Ready(None), + Poll::Ready(Some(Ok(m))) => Poll::Ready(Some(Ok(m))), + Poll::Ready(Some(Err(err))) => Poll::Ready(Some(Err(err))), + } + } } /// A `MessageReader` implements a `Stream` of `Message`s on an underlying @@ -345,200 +341,194 @@ where #[pin_project::pin_project] #[derive(Debug)] pub struct MessageReader { - #[pin] - inner: LengthDelimitedReader, + #[pin] + inner: LengthDelimitedReader, } impl MessageReader { - /// Drops the `MessageReader` resource, yielding the underlying I/O stream - /// together with the remaining write buffer containing the protocol - /// negotiation frame data that has not yet been written to the I/O stream. - /// - /// # Panics - /// - /// Panics if the read buffer or write buffer is not empty, meaning that either - /// an incoming protocol negotiation frame has been partially read, or an - /// outgoing frame has not yet been flushed. The read buffer is guaranteed to - /// be empty whenever `MessageReader::poll` returned a message. The write - /// buffer is guaranteed to be empty whenever the sink has been flushed. - pub fn into_inner(self) -> R { - self.inner.into_inner() - } + /// Drops the `MessageReader` resource, yielding the underlying I/O stream + /// together with the remaining write buffer containing the protocol + /// negotiation frame data that has not yet been written to the I/O stream. + /// + /// # Panics + /// + /// Panics if the read buffer or write buffer is not empty, meaning that either + /// an incoming protocol negotiation frame has been partially read, or an + /// outgoing frame has not yet been flushed. The read buffer is guaranteed to + /// be empty whenever `MessageReader::poll` returned a message. The write + /// buffer is guaranteed to be empty whenever the sink has been flushed. + pub fn into_inner(self) -> R { + self.inner.into_inner() + } } impl Stream for MessageReader where - R: AsyncRead, + R: AsyncRead, { - type Item = Result; + type Item = Result; - fn poll_next(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll> { - poll_stream(self.project().inner, cx) - } + fn poll_next(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll> { + poll_stream(self.project().inner, cx) + } } impl AsyncWrite for MessageReader where - TInner: AsyncWrite, + TInner: AsyncWrite, { - fn poll_write( - self: Pin<&mut Self>, - cx: &mut Context<'_>, - buf: &[u8], - ) -> Poll> { - self.project().inner.poll_write(cx, buf) - } - - fn poll_flush(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll> { - self.project().inner.poll_flush(cx) - } - - fn poll_close(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll> { - self.project().inner.poll_close(cx) - } - - fn poll_write_vectored( - self: Pin<&mut Self>, - cx: &mut Context<'_>, - bufs: &[IoSlice<'_>], - ) -> Poll> { - self.project().inner.poll_write_vectored(cx, bufs) - } + fn poll_write( + self: Pin<&mut Self>, + cx: &mut Context<'_>, + buf: &[u8], + ) -> Poll> { + self.project().inner.poll_write(cx, buf) + } + + fn poll_flush(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll> { + self.project().inner.poll_flush(cx) + } + + fn poll_close(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll> { + self.project().inner.poll_close(cx) + } + + fn poll_write_vectored( + self: Pin<&mut Self>, + cx: &mut Context<'_>, + bufs: &[IoSlice<'_>], + ) -> Poll> { + self.project().inner.poll_write_vectored(cx, bufs) + } } fn poll_stream( - stream: Pin<&mut S>, - cx: &mut Context<'_>, + stream: Pin<&mut S>, + cx: &mut Context<'_>, ) -> Poll>> where - S: Stream>, + S: Stream>, { - let msg = if let Some(msg) = ready!(stream.poll_next(cx)?) { - match Message::decode(msg) { - Ok(m) => m, - Err(err) => return Poll::Ready(Some(Err(err))), - } - } else { - return Poll::Ready(None); - }; - - tracing::trace!(target: LOG_TARGET, "Received message: {:?}", msg); - - Poll::Ready(Some(Ok(msg))) + let msg = if let Some(msg) = ready!(stream.poll_next(cx)?) { + match Message::decode(msg) { + Ok(m) => m, + Err(err) => return Poll::Ready(Some(Err(err))), + } + } else { + return Poll::Ready(None); + }; + + tracing::trace!(target: LOG_TARGET, "Received message: {:?}", msg); + + Poll::Ready(Some(Ok(msg))) } /// A protocol error. #[derive(Debug, thiserror::Error)] pub enum ProtocolError { - /// I/O error. - #[error("I/O error: `{0}`")] - IoError(#[from] io::Error), + /// I/O error. + #[error("I/O error: `{0}`")] + IoError(#[from] io::Error), - /// Received an invalid message from the remote. - #[error("Received an invalid message from the remote.")] - InvalidMessage, + /// Received an invalid message from the remote. + #[error("Received an invalid message from the remote.")] + InvalidMessage, - /// A protocol (name) is invalid. - #[error("A protocol (name) is invalid.")] - InvalidProtocol, + /// A protocol (name) is invalid. + #[error("A protocol (name) is invalid.")] + InvalidProtocol, - /// Too many protocols have been returned by the remote. - #[error("Too many protocols have been returned by the remote.")] - TooManyProtocols, + /// Too many protocols have been returned by the remote. + #[error("Too many protocols have been returned by the remote.")] + TooManyProtocols, - /// The protocol is not supported. - #[error("The protocol is not supported.")] - ProtocolNotSupported, + /// The protocol is not supported. + #[error("The protocol is not supported.")] + ProtocolNotSupported, } impl PartialEq for ProtocolError { - fn eq(&self, other: &Self) -> bool { - match (self, other) { - (ProtocolError::IoError(lhs), ProtocolError::IoError(rhs)) => lhs.kind() == rhs.kind(), - _ => std::mem::discriminant(self) == std::mem::discriminant(other), - } - } + fn eq(&self, other: &Self) -> bool { + match (self, other) { + (ProtocolError::IoError(lhs), ProtocolError::IoError(rhs)) => lhs.kind() == rhs.kind(), + _ => std::mem::discriminant(self) == std::mem::discriminant(other), + } + } } impl From for io::Error { - fn from(err: ProtocolError) -> Self { - if let ProtocolError::IoError(e) = err { - return e; - } - io::ErrorKind::InvalidData.into() - } + fn from(err: ProtocolError) -> Self { + if let ProtocolError::IoError(e) = err { + return e; + } + io::ErrorKind::InvalidData.into() + } } impl From for ProtocolError { - fn from(err: uvi::decode::Error) -> ProtocolError { - Self::from(io::Error::new(io::ErrorKind::InvalidData, err.to_string())) - } + fn from(err: uvi::decode::Error) -> ProtocolError { + Self::from(io::Error::new(io::ErrorKind::InvalidData, err.to_string())) + } } #[cfg(test)] mod tests { - use super::*; - - #[test] - fn test_decode_main_messages() { - // Decode main messages. - let bytes = Bytes::from_static(MSG_MULTISTREAM_1_0); - assert_eq!( - Message::decode(bytes).unwrap(), - Message::Header(HeaderLine::V1) - ); - - let bytes = Bytes::from_static(MSG_PROTOCOL_NA); - assert_eq!(Message::decode(bytes).unwrap(), Message::NotAvailable); - - let bytes = Bytes::from_static(MSG_LS); - assert_eq!(Message::decode(bytes).unwrap(), Message::ListProtocols); - } - - #[test] - fn test_decode_empty_message() { - // Empty message should decode to an IoError, not Header::Protocols. - let bytes = Bytes::from_static(b""); - match Message::decode(bytes).unwrap_err() { - ProtocolError::IoError(io) => assert_eq!(io.kind(), io::ErrorKind::InvalidData), - err => panic!("Unexpected error: {:?}", err), - }; - } - - #[test] - fn test_decode_protocols() { - // Single protocol. - let bytes = Bytes::from_static(b"/protocol-v1\n"); - assert_eq!( - Message::decode(bytes).unwrap(), - Message::Protocol(Protocol::try_from(Bytes::from_static(b"/protocol-v1")).unwrap()) - ); - - // Multiple protocols. - let expected = Message::Protocols(vec![ - Protocol::try_from(Bytes::from_static(b"/protocol-v1")).unwrap(), - Protocol::try_from(Bytes::from_static(b"/protocol-v2")).unwrap(), - ]); - let mut encoded = BytesMut::new(); - expected.encode(&mut encoded).unwrap(); - - // `\r` is the length of the protocol names. - let bytes = Bytes::from_static(b"\r/protocol-v1\n\r/protocol-v2\n\n"); - assert_eq!(encoded, bytes); - - assert_eq!( - Message::decode(bytes).unwrap(), - Message::Protocols(vec![ - Protocol::try_from(Bytes::from_static(b"/protocol-v1")).unwrap(), - Protocol::try_from(Bytes::from_static(b"/protocol-v2")).unwrap(), - ]) - ); - - // Check invalid length. - let bytes = Bytes::from_static(b"\r/v1\n\n"); - assert_eq!( - Message::decode(bytes).unwrap_err(), - ProtocolError::InvalidMessage - ); - } + use super::*; + + #[test] + fn test_decode_main_messages() { + // Decode main messages. + let bytes = Bytes::from_static(MSG_MULTISTREAM_1_0); + assert_eq!(Message::decode(bytes).unwrap(), Message::Header(HeaderLine::V1)); + + let bytes = Bytes::from_static(MSG_PROTOCOL_NA); + assert_eq!(Message::decode(bytes).unwrap(), Message::NotAvailable); + + let bytes = Bytes::from_static(MSG_LS); + assert_eq!(Message::decode(bytes).unwrap(), Message::ListProtocols); + } + + #[test] + fn test_decode_empty_message() { + // Empty message should decode to an IoError, not Header::Protocols. + let bytes = Bytes::from_static(b""); + match Message::decode(bytes).unwrap_err() { + ProtocolError::IoError(io) => assert_eq!(io.kind(), io::ErrorKind::InvalidData), + err => panic!("Unexpected error: {:?}", err), + }; + } + + #[test] + fn test_decode_protocols() { + // Single protocol. + let bytes = Bytes::from_static(b"/protocol-v1\n"); + assert_eq!( + Message::decode(bytes).unwrap(), + Message::Protocol(Protocol::try_from(Bytes::from_static(b"/protocol-v1")).unwrap()) + ); + + // Multiple protocols. + let expected = Message::Protocols(vec![ + Protocol::try_from(Bytes::from_static(b"/protocol-v1")).unwrap(), + Protocol::try_from(Bytes::from_static(b"/protocol-v2")).unwrap(), + ]); + let mut encoded = BytesMut::new(); + expected.encode(&mut encoded).unwrap(); + + // `\r` is the length of the protocol names. + let bytes = Bytes::from_static(b"\r/protocol-v1\n\r/protocol-v2\n\n"); + assert_eq!(encoded, bytes); + + assert_eq!( + Message::decode(bytes).unwrap(), + Message::Protocols(vec![ + Protocol::try_from(Bytes::from_static(b"/protocol-v1")).unwrap(), + Protocol::try_from(Bytes::from_static(b"/protocol-v2")).unwrap(), + ]) + ); + + // Check invalid length. + let bytes = Bytes::from_static(b"\r/v1\n\n"); + assert_eq!(Message::decode(bytes).unwrap_err(), ProtocolError::InvalidMessage); + } } diff --git a/client/litep2p/src/peer_id.rs b/client/litep2p/src/peer_id.rs index 5a4cc1a7..23fe995e 100644 --- a/client/litep2p/src/peer_id.rs +++ b/client/litep2p/src/peer_id.rs @@ -41,314 +41,311 @@ const MAX_INLINE_KEY_LENGTH: usize = 42; /// as specified in [specs/peer-ids](https://github.com/libp2p/specs/blob/master/peer-ids/peer-ids.md). #[derive(Clone, Copy, Eq, Hash, Ord, PartialEq, PartialOrd)] pub struct PeerId { - multihash: Multihash, + multihash: Multihash, } impl fmt::Debug for PeerId { - fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { - f.debug_tuple("PeerId").field(&self.to_base58()).finish() - } + fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { + f.debug_tuple("PeerId").field(&self.to_base58()).finish() + } } impl fmt::Display for PeerId { - fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { - self.to_base58().fmt(f) - } + fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { + self.to_base58().fmt(f) + } } impl PeerId { - /// Builds a `PeerId` from a public key. - pub fn from_public_key(key: &PublicKey) -> PeerId { - Self::from_public_key_protobuf(&key.to_protobuf_encoding()) - } - - /// Builds a `PeerId` from a public key in protobuf encoding. - pub fn from_public_key_protobuf(key_enc: &[u8]) -> PeerId { - let hash_algorithm = if key_enc.len() <= MAX_INLINE_KEY_LENGTH { - Code::Identity - } else { - Code::Sha2_256 - }; - - let multihash = hash_algorithm.digest(key_enc); - - PeerId { multihash } - } - - /// Parses a `PeerId` from bytes. - pub fn from_bytes(data: &[u8]) -> Result { - PeerId::from_multihash(Multihash::from_bytes(data)?) - .map_err(|mh| Error::UnsupportedCode(mh.code())) - } - - /// Tries to turn a `Multihash` into a `PeerId`. - /// - /// If the multihash does not use a valid hashing algorithm for peer IDs, - /// or the hash value does not satisfy the constraints for a hashed - /// peer ID, it is returned as an `Err`. - pub fn from_multihash(multihash: Multihash) -> Result { - match Code::try_from(multihash.code()) { - Ok(Code::Sha2_256) => Ok(PeerId { multihash }), - Ok(Code::Identity) if multihash.digest().len() <= MAX_INLINE_KEY_LENGTH => - Ok(PeerId { multihash }), - _ => Err(multihash), - } - } - - /// Tries to extract a [`PeerId`] from the given [`Multiaddr`]. - /// - /// In case the given [`Multiaddr`] ends with `/p2p/`, this function - /// will return the encapsulated [`PeerId`], otherwise it will return `None`. - pub fn try_from_multiaddr(address: &Multiaddr) -> Option { - address.iter().last().and_then(|p| match p { - Protocol::P2p(hash) => PeerId::from_multihash(hash).ok(), - _ => None, - }) - } - - /// Generates a random peer ID from a cryptographically secure PRNG. - /// - /// This is useful for randomly walking on a DHT, or for testing purposes. - pub fn random() -> PeerId { - let peer_id = rand::thread_rng().gen::<[u8; 32]>(); - PeerId { - multihash: Multihash::wrap(Code::Identity.into(), &peer_id) - .expect("The digest size is never too large"), - } - } - - /// Returns a raw bytes representation of this `PeerId`. - pub fn to_bytes(&self) -> Vec { - self.multihash.to_bytes() - } - - /// Returns a base-58 encoded string of this `PeerId`. - pub fn to_base58(&self) -> String { - bs58::encode(self.to_bytes()).into_string() - } - - /// Checks whether the public key passed as parameter matches the public key of this `PeerId`. - /// - /// Returns `None` if this `PeerId`s hash algorithm is not supported when encoding the - /// given public key, otherwise `Some` boolean as the result of an equality check. - pub fn is_public_key(&self, public_key: &PublicKey) -> Option { - let alg = Code::try_from(self.multihash.code()) - .expect("Internal multihash is always a valid `Code`"); - let enc = public_key.to_protobuf_encoding(); - Some(alg.digest(&enc) == self.multihash) - } + /// Builds a `PeerId` from a public key. + pub fn from_public_key(key: &PublicKey) -> PeerId { + Self::from_public_key_protobuf(&key.to_protobuf_encoding()) + } + + /// Builds a `PeerId` from a public key in protobuf encoding. + pub fn from_public_key_protobuf(key_enc: &[u8]) -> PeerId { + let hash_algorithm = + if key_enc.len() <= MAX_INLINE_KEY_LENGTH { Code::Identity } else { Code::Sha2_256 }; + + let multihash = hash_algorithm.digest(key_enc); + + PeerId { multihash } + } + + /// Parses a `PeerId` from bytes. + pub fn from_bytes(data: &[u8]) -> Result { + PeerId::from_multihash(Multihash::from_bytes(data)?) + .map_err(|mh| Error::UnsupportedCode(mh.code())) + } + + /// Tries to turn a `Multihash` into a `PeerId`. + /// + /// If the multihash does not use a valid hashing algorithm for peer IDs, + /// or the hash value does not satisfy the constraints for a hashed + /// peer ID, it is returned as an `Err`. + pub fn from_multihash(multihash: Multihash) -> Result { + match Code::try_from(multihash.code()) { + Ok(Code::Sha2_256) => Ok(PeerId { multihash }), + Ok(Code::Identity) if multihash.digest().len() <= MAX_INLINE_KEY_LENGTH => + Ok(PeerId { multihash }), + _ => Err(multihash), + } + } + + /// Tries to extract a [`PeerId`] from the given [`Multiaddr`]. + /// + /// In case the given [`Multiaddr`] ends with `/p2p/`, this function + /// will return the encapsulated [`PeerId`], otherwise it will return `None`. + pub fn try_from_multiaddr(address: &Multiaddr) -> Option { + address.iter().last().and_then(|p| match p { + Protocol::P2p(hash) => PeerId::from_multihash(hash).ok(), + _ => None, + }) + } + + /// Generates a random peer ID from a cryptographically secure PRNG. + /// + /// This is useful for randomly walking on a DHT, or for testing purposes. + pub fn random() -> PeerId { + let peer_id = rand::thread_rng().gen::<[u8; 32]>(); + PeerId { + multihash: Multihash::wrap(Code::Identity.into(), &peer_id) + .expect("The digest size is never too large"), + } + } + + /// Returns a raw bytes representation of this `PeerId`. + pub fn to_bytes(&self) -> Vec { + self.multihash.to_bytes() + } + + /// Returns a base-58 encoded string of this `PeerId`. + pub fn to_base58(&self) -> String { + bs58::encode(self.to_bytes()).into_string() + } + + /// Checks whether the public key passed as parameter matches the public key of this `PeerId`. + /// + /// Returns `None` if this `PeerId`s hash algorithm is not supported when encoding the + /// given public key, otherwise `Some` boolean as the result of an equality check. + pub fn is_public_key(&self, public_key: &PublicKey) -> Option { + let alg = Code::try_from(self.multihash.code()) + .expect("Internal multihash is always a valid `Code`"); + let enc = public_key.to_protobuf_encoding(); + Some(alg.digest(&enc) == self.multihash) + } } impl From for PeerId { - fn from(key: PublicKey) -> PeerId { - PeerId::from_public_key(&key) - } + fn from(key: PublicKey) -> PeerId { + PeerId::from_public_key(&key) + } } impl From<&PublicKey> for PeerId { - fn from(key: &PublicKey) -> PeerId { - PeerId::from_public_key(key) - } + fn from(key: &PublicKey) -> PeerId { + PeerId::from_public_key(key) + } } impl TryFrom> for PeerId { - type Error = Vec; + type Error = Vec; - fn try_from(value: Vec) -> Result { - PeerId::from_bytes(&value).map_err(|_| value) - } + fn try_from(value: Vec) -> Result { + PeerId::from_bytes(&value).map_err(|_| value) + } } impl TryFrom for PeerId { - type Error = Multihash; + type Error = Multihash; - fn try_from(value: Multihash) -> Result { - PeerId::from_multihash(value) - } + fn try_from(value: Multihash) -> Result { + PeerId::from_multihash(value) + } } impl AsRef for PeerId { - fn as_ref(&self) -> &Multihash { - &self.multihash - } + fn as_ref(&self) -> &Multihash { + &self.multihash + } } impl From for Multihash { - fn from(peer_id: PeerId) -> Self { - peer_id.multihash - } + fn from(peer_id: PeerId) -> Self { + peer_id.multihash + } } impl From for Vec { - fn from(peer_id: PeerId) -> Self { - peer_id.to_bytes() - } + fn from(peer_id: PeerId) -> Self { + peer_id.to_bytes() + } } impl Serialize for PeerId { - fn serialize(&self, serializer: S) -> Result - where - S: serde::Serializer, - { - if serializer.is_human_readable() { - serializer.serialize_str(&self.to_base58()) - } else { - serializer.serialize_bytes(&self.to_bytes()[..]) - } - } + fn serialize(&self, serializer: S) -> Result + where + S: serde::Serializer, + { + if serializer.is_human_readable() { + serializer.serialize_str(&self.to_base58()) + } else { + serializer.serialize_bytes(&self.to_bytes()[..]) + } + } } impl<'de> Deserialize<'de> for PeerId { - fn deserialize(deserializer: D) -> Result - where - D: serde::Deserializer<'de>, - { - use serde::de::*; - - struct PeerIdVisitor; - - impl Visitor<'_> for PeerIdVisitor { - type Value = PeerId; - - fn expecting(&self, f: &mut fmt::Formatter) -> fmt::Result { - write!(f, "valid peer id") - } - - fn visit_bytes(self, v: &[u8]) -> Result - where - E: Error, - { - PeerId::from_bytes(v).map_err(|_| Error::invalid_value(Unexpected::Bytes(v), &self)) - } - - fn visit_str(self, v: &str) -> Result - where - E: Error, - { - PeerId::from_str(v).map_err(|_| Error::invalid_value(Unexpected::Str(v), &self)) - } - } - - if deserializer.is_human_readable() { - deserializer.deserialize_str(PeerIdVisitor) - } else { - deserializer.deserialize_bytes(PeerIdVisitor) - } - } + fn deserialize(deserializer: D) -> Result + where + D: serde::Deserializer<'de>, + { + use serde::de::*; + + struct PeerIdVisitor; + + impl Visitor<'_> for PeerIdVisitor { + type Value = PeerId; + + fn expecting(&self, f: &mut fmt::Formatter) -> fmt::Result { + write!(f, "valid peer id") + } + + fn visit_bytes(self, v: &[u8]) -> Result + where + E: Error, + { + PeerId::from_bytes(v).map_err(|_| Error::invalid_value(Unexpected::Bytes(v), &self)) + } + + fn visit_str(self, v: &str) -> Result + where + E: Error, + { + PeerId::from_str(v).map_err(|_| Error::invalid_value(Unexpected::Str(v), &self)) + } + } + + if deserializer.is_human_readable() { + deserializer.deserialize_str(PeerIdVisitor) + } else { + deserializer.deserialize_bytes(PeerIdVisitor) + } + } } #[derive(Debug, Error)] pub enum ParseError { - #[error("base-58 decode error: {0}")] - B58(#[from] bs58::decode::Error), - #[error("decoding multihash failed")] - MultiHash, + #[error("base-58 decode error: {0}")] + B58(#[from] bs58::decode::Error), + #[error("decoding multihash failed")] + MultiHash, } impl FromStr for PeerId { - type Err = ParseError; + type Err = ParseError; - #[inline] - fn from_str(s: &str) -> Result { - let bytes = bs58::decode(s).into_vec()?; - PeerId::from_bytes(&bytes).map_err(|_| ParseError::MultiHash) - } + #[inline] + fn from_str(s: &str) -> Result { + let bytes = bs58::decode(s).into_vec()?; + PeerId::from_bytes(&bytes).map_err(|_| ParseError::MultiHash) + } } #[cfg(test)] mod tests { - use crate::{crypto::dilithium::Keypair, PeerId}; - use multiaddr::{Multiaddr, Protocol}; - use multihash::Multihash; - - #[test] - fn peer_id_is_public_key() { - let key = Keypair::generate().public(); - let peer_id = key.to_peer_id(); - assert_eq!(peer_id.is_public_key(&key.into()), Some(true)); - } - - #[test] - fn peer_id_into_bytes_then_from_bytes() { - let peer_id = Keypair::generate().public().to_peer_id(); - let second = PeerId::from_bytes(&peer_id.to_bytes()).unwrap(); - assert_eq!(peer_id, second); - } - - #[test] - fn peer_id_to_base58_then_back() { - let peer_id = Keypair::generate().public().to_peer_id(); - let second: PeerId = peer_id.to_base58().parse().unwrap(); - assert_eq!(peer_id, second); - } - - #[test] - fn random_peer_id_is_valid() { - for _ in 0..5000 { - let peer_id = PeerId::random(); - assert_eq!(peer_id, PeerId::from_bytes(&peer_id.to_bytes()).unwrap()); - } - } - - #[test] - fn peer_id_from_multiaddr() { - let address = "[::1]:1337".parse::().unwrap(); - let peer = PeerId::random(); - let address = Multiaddr::empty() - .with(Protocol::from(address.ip())) - .with(Protocol::Tcp(address.port())) - .with(Protocol::P2p(Multihash::from(peer))); - - assert_eq!(peer, PeerId::try_from_multiaddr(&address).unwrap()); - } - - #[test] - fn peer_id_from_multiaddr_no_peer_id() { - let address = "[::1]:1337".parse::().unwrap(); - let address = Multiaddr::empty() - .with(Protocol::from(address.ip())) - .with(Protocol::Tcp(address.port())); - - assert!(PeerId::try_from_multiaddr(&address).is_none()); - } - - #[test] - fn peer_id_from_bytes() { - let peer = PeerId::random(); - let bytes = peer.to_bytes(); - - assert_eq!(PeerId::try_from(bytes).unwrap(), peer); - } - - #[test] - fn peer_id_as_multihash() { - let peer = PeerId::random(); - let multihash = Multihash::from(peer); - - assert_eq!(&multihash, peer.as_ref()); - assert_eq!(PeerId::try_from(multihash).unwrap(), peer); - } - - #[test] - fn serialize_deserialize() { - let peer = PeerId::random(); - let serialized = serde_json::to_string(&peer).unwrap(); - let deserialized = serde_json::from_str(&serialized).unwrap(); - - assert_eq!(peer, deserialized); - } - - #[test] - fn invalid_multihash() { - fn test() -> crate::Result { - let bytes = [ - 0x16, 0x20, 0x64, 0x4b, 0xcc, 0x7e, 0x56, 0x43, 0x73, 0x04, 0x09, 0x99, 0xaa, 0xc8, - 0x9e, 0x76, 0x22, 0xf3, 0xca, 0x71, 0xfb, 0xa1, 0xd9, 0x72, 0xfd, 0x94, 0xa3, 0x1c, - 0x3b, 0xfb, 0xf2, 0x4e, 0x39, 0x38, - ]; - - PeerId::from_multihash(Multihash::from_bytes(&bytes).unwrap()).map_err(From::from) - } - let _error = test().unwrap_err(); - } + use crate::{crypto::dilithium::Keypair, PeerId}; + use multiaddr::{Multiaddr, Protocol}; + use multihash::Multihash; + + #[test] + fn peer_id_is_public_key() { + let key = Keypair::generate().public(); + let peer_id = key.to_peer_id(); + assert_eq!(peer_id.is_public_key(&key.into()), Some(true)); + } + + #[test] + fn peer_id_into_bytes_then_from_bytes() { + let peer_id = Keypair::generate().public().to_peer_id(); + let second = PeerId::from_bytes(&peer_id.to_bytes()).unwrap(); + assert_eq!(peer_id, second); + } + + #[test] + fn peer_id_to_base58_then_back() { + let peer_id = Keypair::generate().public().to_peer_id(); + let second: PeerId = peer_id.to_base58().parse().unwrap(); + assert_eq!(peer_id, second); + } + + #[test] + fn random_peer_id_is_valid() { + for _ in 0..5000 { + let peer_id = PeerId::random(); + assert_eq!(peer_id, PeerId::from_bytes(&peer_id.to_bytes()).unwrap()); + } + } + + #[test] + fn peer_id_from_multiaddr() { + let address = "[::1]:1337".parse::().unwrap(); + let peer = PeerId::random(); + let address = Multiaddr::empty() + .with(Protocol::from(address.ip())) + .with(Protocol::Tcp(address.port())) + .with(Protocol::P2p(Multihash::from(peer))); + + assert_eq!(peer, PeerId::try_from_multiaddr(&address).unwrap()); + } + + #[test] + fn peer_id_from_multiaddr_no_peer_id() { + let address = "[::1]:1337".parse::().unwrap(); + let address = Multiaddr::empty() + .with(Protocol::from(address.ip())) + .with(Protocol::Tcp(address.port())); + + assert!(PeerId::try_from_multiaddr(&address).is_none()); + } + + #[test] + fn peer_id_from_bytes() { + let peer = PeerId::random(); + let bytes = peer.to_bytes(); + + assert_eq!(PeerId::try_from(bytes).unwrap(), peer); + } + + #[test] + fn peer_id_as_multihash() { + let peer = PeerId::random(); + let multihash = Multihash::from(peer); + + assert_eq!(&multihash, peer.as_ref()); + assert_eq!(PeerId::try_from(multihash).unwrap(), peer); + } + + #[test] + fn serialize_deserialize() { + let peer = PeerId::random(); + let serialized = serde_json::to_string(&peer).unwrap(); + let deserialized = serde_json::from_str(&serialized).unwrap(); + + assert_eq!(peer, deserialized); + } + + #[test] + fn invalid_multihash() { + fn test() -> crate::Result { + let bytes = [ + 0x16, 0x20, 0x64, 0x4b, 0xcc, 0x7e, 0x56, 0x43, 0x73, 0x04, 0x09, 0x99, 0xaa, 0xc8, + 0x9e, 0x76, 0x22, 0xf3, 0xca, 0x71, 0xfb, 0xa1, 0xd9, 0x72, 0xfd, 0x94, 0xa3, 0x1c, + 0x3b, 0xfb, 0xf2, 0x4e, 0x39, 0x38, + ]; + + PeerId::from_multihash(Multihash::from_bytes(&bytes).unwrap()).map_err(From::from) + } + let _error = test().unwrap_err(); + } } diff --git a/client/litep2p/src/protocol/connection.rs b/client/litep2p/src/protocol/connection.rs index a11bee60..012dc61f 100644 --- a/client/litep2p/src/protocol/connection.rs +++ b/client/litep2p/src/protocol/connection.rs @@ -21,9 +21,9 @@ //! Connection-related helper code. use crate::{ - error::{Error, SubstreamError}, - protocol::{protocol_set::ProtocolCommand, transport_service::SubstreamKeepAlive}, - types::{protocol::ProtocolName, ConnectionId, SubstreamId}, + error::{Error, SubstreamError}, + protocol::{protocol_set::ProtocolCommand, transport_service::SubstreamKeepAlive}, + types::{protocol::ProtocolName, ConnectionId, SubstreamId}, }; use tokio::sync::mpsc::{error::TrySendError, Sender, WeakSender}; @@ -31,133 +31,130 @@ use tokio::sync::mpsc::{error::TrySendError, Sender, WeakSender}; /// Connection type, from the point of view of the protocol. #[derive(Debug, Clone)] enum ConnectionType { - /// Connection is actively kept open. - Active(Sender), + /// Connection is actively kept open. + Active(Sender), - /// Connection is considered inactive as far as the protocol is concerned - /// and if no substreams are being opened and no protocol is interested in - /// keeping the connection open, it will be closed. - Inactive(WeakSender), + /// Connection is considered inactive as far as the protocol is concerned + /// and if no substreams are being opened and no protocol is interested in + /// keeping the connection open, it will be closed. + Inactive(WeakSender), } /// Type representing a handle to connection which allows protocols to communicate with the /// connection. #[derive(Debug, Clone)] pub struct ConnectionHandle { - /// Connection type. - connection: ConnectionType, + /// Connection type. + connection: ConnectionType, - /// Connection ID. - connection_id: ConnectionId, + /// Connection ID. + connection_id: ConnectionId, } impl ConnectionHandle { - /// Create new [`ConnectionHandle`]. - /// - /// By default the connection is set as `Active` to give protocols time to open a substream if - /// they wish. - pub fn new(connection_id: ConnectionId, connection: Sender) -> Self { - Self { - connection_id, - connection: ConnectionType::Active(connection), - } - } - - /// Get active sender from the [`ConnectionHandle`] and then downgrade it to an inactive - /// connection. - /// - /// This function is only called once when the connection is established to remote peer and that - /// one time the connection type must be `Active`, unless there is a logic bug in `litep2p`. - pub fn downgrade(&mut self) -> Self { - match &self.connection { - ConnectionType::Active(connection) => { - let handle = Self::new(self.connection_id, connection.clone()); - self.connection = ConnectionType::Inactive(connection.downgrade()); - - handle - } - ConnectionType::Inactive(_) => { - panic!("state mismatch: tried to downgrade an inactive connection") - } - } - } - - /// Get reference to connection ID. - pub fn connection_id(&self) -> &ConnectionId { - &self.connection_id - } - - /// Mark connection as closed. - pub fn close(&mut self) { - if let ConnectionType::Active(connection) = &self.connection { - self.connection = ConnectionType::Inactive(connection.downgrade()); - } - } - - /// Try to upgrade the connection to active state. - pub fn try_upgrade(&mut self) { - if let ConnectionType::Inactive(inactive) = &self.connection { - if let Some(active) = inactive.upgrade() { - self.connection = ConnectionType::Active(active); - } - } - } - - /// Attempt to acquire permit which will keep the connection open for indefinite time. - pub fn try_get_permit(&self) -> Option { - match &self.connection { - ConnectionType::Active(active) => Some(Permit::new(active.clone())), - ConnectionType::Inactive(inactive) => Some(Permit::new(inactive.upgrade()?)), - } - } - - /// Open substream to remote peer over `protocol` and send the acquired permit to the - /// transport so it can be given to the opened substream. - pub fn open_substream( - &mut self, - protocol: ProtocolName, - fallback_names: Vec, - substream_id: SubstreamId, - permit: Permit, - keep_alive: SubstreamKeepAlive, - ) -> Result<(), SubstreamError> { - match &self.connection { - ConnectionType::Active(active) => active.clone(), - ConnectionType::Inactive(inactive) => - inactive.upgrade().ok_or(SubstreamError::ConnectionClosed)?, - } - .try_send(ProtocolCommand::OpenSubstream { - protocol: protocol.clone(), - fallback_names, - substream_id, - connection_id: self.connection_id, - permit, - keep_alive, - }) - .map_err(|error| match error { - TrySendError::Full(_) => SubstreamError::ChannelClogged, - TrySendError::Closed(_) => SubstreamError::ConnectionClosed, - }) - } - - /// Force close connection. - pub fn force_close(&mut self) -> crate::Result<()> { - match &self.connection { - ConnectionType::Active(active) => active.clone(), - ConnectionType::Inactive(inactive) => - inactive.upgrade().ok_or(Error::ConnectionClosed)?, - } - .try_send(ProtocolCommand::ForceClose) - .map_err(|error| match error { - TrySendError::Full(_) => Error::ChannelClogged, - TrySendError::Closed(_) => Error::ConnectionClosed, - }) - } - - /// Check if the connection is active. - pub fn is_active(&self) -> bool { - matches!(self.connection, ConnectionType::Active(_)) - } + /// Create new [`ConnectionHandle`]. + /// + /// By default the connection is set as `Active` to give protocols time to open a substream if + /// they wish. + pub fn new(connection_id: ConnectionId, connection: Sender) -> Self { + Self { connection_id, connection: ConnectionType::Active(connection) } + } + + /// Get active sender from the [`ConnectionHandle`] and then downgrade it to an inactive + /// connection. + /// + /// This function is only called once when the connection is established to remote peer and that + /// one time the connection type must be `Active`, unless there is a logic bug in `litep2p`. + pub fn downgrade(&mut self) -> Self { + match &self.connection { + ConnectionType::Active(connection) => { + let handle = Self::new(self.connection_id, connection.clone()); + self.connection = ConnectionType::Inactive(connection.downgrade()); + + handle + }, + ConnectionType::Inactive(_) => { + panic!("state mismatch: tried to downgrade an inactive connection") + }, + } + } + + /// Get reference to connection ID. + pub fn connection_id(&self) -> &ConnectionId { + &self.connection_id + } + + /// Mark connection as closed. + pub fn close(&mut self) { + if let ConnectionType::Active(connection) = &self.connection { + self.connection = ConnectionType::Inactive(connection.downgrade()); + } + } + + /// Try to upgrade the connection to active state. + pub fn try_upgrade(&mut self) { + if let ConnectionType::Inactive(inactive) = &self.connection { + if let Some(active) = inactive.upgrade() { + self.connection = ConnectionType::Active(active); + } + } + } + + /// Attempt to acquire permit which will keep the connection open for indefinite time. + pub fn try_get_permit(&self) -> Option { + match &self.connection { + ConnectionType::Active(active) => Some(Permit::new(active.clone())), + ConnectionType::Inactive(inactive) => Some(Permit::new(inactive.upgrade()?)), + } + } + + /// Open substream to remote peer over `protocol` and send the acquired permit to the + /// transport so it can be given to the opened substream. + pub fn open_substream( + &mut self, + protocol: ProtocolName, + fallback_names: Vec, + substream_id: SubstreamId, + permit: Permit, + keep_alive: SubstreamKeepAlive, + ) -> Result<(), SubstreamError> { + match &self.connection { + ConnectionType::Active(active) => active.clone(), + ConnectionType::Inactive(inactive) => + inactive.upgrade().ok_or(SubstreamError::ConnectionClosed)?, + } + .try_send(ProtocolCommand::OpenSubstream { + protocol: protocol.clone(), + fallback_names, + substream_id, + connection_id: self.connection_id, + permit, + keep_alive, + }) + .map_err(|error| match error { + TrySendError::Full(_) => SubstreamError::ChannelClogged, + TrySendError::Closed(_) => SubstreamError::ConnectionClosed, + }) + } + + /// Force close connection. + pub fn force_close(&mut self) -> crate::Result<()> { + match &self.connection { + ConnectionType::Active(active) => active.clone(), + ConnectionType::Inactive(inactive) => + inactive.upgrade().ok_or(Error::ConnectionClosed)?, + } + .try_send(ProtocolCommand::ForceClose) + .map_err(|error| match error { + TrySendError::Full(_) => Error::ChannelClogged, + TrySendError::Closed(_) => Error::ConnectionClosed, + }) + } + + /// Check if the connection is active. + pub fn is_active(&self) -> bool { + matches!(self.connection, ConnectionType::Active(_)) + } } /// Type which allows to keep the connection opened and not allow the keep-alive mechanism to close @@ -174,102 +171,99 @@ impl ConnectionHandle { /// relevant #[derive(Debug, Clone)] pub struct Permit { - /// Active connection. - _connection: Sender, + /// Active connection. + _connection: Sender, } impl Permit { - /// Create new [`Permit`] which allows the connection to be kept open. - pub fn new(_connection: Sender) -> Self { - Self { _connection } - } + /// Create new [`Permit`] which allows the connection to be kept open. + pub fn new(_connection: Sender) -> Self { + Self { _connection } + } } #[cfg(test)] mod tests { - use super::*; - use tokio::sync::mpsc::channel; - - #[test] - #[should_panic] - fn downgrade_inactive_connection() { - let (tx, _rx) = channel(1); - let mut handle = ConnectionHandle::new(ConnectionId::new(), tx); - - let mut new_handle = handle.downgrade(); - assert!(std::matches!( - new_handle.connection, - ConnectionType::Inactive(_) - )); - - // try to downgrade an already-downgraded connection - let _handle = new_handle.downgrade(); - } - - #[tokio::test] - async fn open_substream_open_downgraded_connection() { - let (tx, mut rx) = channel(1); - let mut handle = ConnectionHandle::new(ConnectionId::new(), tx); - let mut handle = handle.downgrade(); - let permit = handle.try_get_permit().unwrap(); - - let result = handle.open_substream( - ProtocolName::from("/protocol/1"), - Vec::new(), - SubstreamId::new(), - permit, - SubstreamKeepAlive::Yes, - ); - - assert!(result.is_ok()); - assert!(rx.recv().await.is_some()); - } - - #[tokio::test] - async fn open_substream_closed_downgraded_connection() { - let (tx, _rx) = channel(1); - let mut handle = ConnectionHandle::new(ConnectionId::new(), tx); - let mut handle = handle.downgrade(); - let permit = handle.try_get_permit().unwrap(); - drop(_rx); - - let result = handle.open_substream( - ProtocolName::from("/protocol/1"), - Vec::new(), - SubstreamId::new(), - permit, - SubstreamKeepAlive::Yes, - ); - - assert!(result.is_err()); - } - - #[tokio::test] - async fn open_substream_channel_clogged() { - let (tx, _rx) = channel(1); - let mut handle = ConnectionHandle::new(ConnectionId::new(), tx); - let mut handle = handle.downgrade(); - let permit = handle.try_get_permit().unwrap(); - - let result = handle.open_substream( - ProtocolName::from("/protocol/1"), - Vec::new(), - SubstreamId::new(), - permit, - SubstreamKeepAlive::Yes, - ); - assert!(result.is_ok()); - - let permit = handle.try_get_permit().unwrap(); - match handle.open_substream( - ProtocolName::from("/protocol/1"), - Vec::new(), - SubstreamId::new(), - permit, - SubstreamKeepAlive::Yes, - ) { - Err(SubstreamError::ChannelClogged) => {} - error => panic!("invalid error: {error:?}"), - } - } + use super::*; + use tokio::sync::mpsc::channel; + + #[test] + #[should_panic] + fn downgrade_inactive_connection() { + let (tx, _rx) = channel(1); + let mut handle = ConnectionHandle::new(ConnectionId::new(), tx); + + let mut new_handle = handle.downgrade(); + assert!(std::matches!(new_handle.connection, ConnectionType::Inactive(_))); + + // try to downgrade an already-downgraded connection + let _handle = new_handle.downgrade(); + } + + #[tokio::test] + async fn open_substream_open_downgraded_connection() { + let (tx, mut rx) = channel(1); + let mut handle = ConnectionHandle::new(ConnectionId::new(), tx); + let mut handle = handle.downgrade(); + let permit = handle.try_get_permit().unwrap(); + + let result = handle.open_substream( + ProtocolName::from("/protocol/1"), + Vec::new(), + SubstreamId::new(), + permit, + SubstreamKeepAlive::Yes, + ); + + assert!(result.is_ok()); + assert!(rx.recv().await.is_some()); + } + + #[tokio::test] + async fn open_substream_closed_downgraded_connection() { + let (tx, _rx) = channel(1); + let mut handle = ConnectionHandle::new(ConnectionId::new(), tx); + let mut handle = handle.downgrade(); + let permit = handle.try_get_permit().unwrap(); + drop(_rx); + + let result = handle.open_substream( + ProtocolName::from("/protocol/1"), + Vec::new(), + SubstreamId::new(), + permit, + SubstreamKeepAlive::Yes, + ); + + assert!(result.is_err()); + } + + #[tokio::test] + async fn open_substream_channel_clogged() { + let (tx, _rx) = channel(1); + let mut handle = ConnectionHandle::new(ConnectionId::new(), tx); + let mut handle = handle.downgrade(); + let permit = handle.try_get_permit().unwrap(); + + let result = handle.open_substream( + ProtocolName::from("/protocol/1"), + Vec::new(), + SubstreamId::new(), + permit, + SubstreamKeepAlive::Yes, + ); + assert!(result.is_ok()); + + let permit = handle.try_get_permit().unwrap(); + match handle.open_substream( + ProtocolName::from("/protocol/1"), + Vec::new(), + SubstreamId::new(), + permit, + SubstreamKeepAlive::Yes, + ) { + Err(SubstreamError::ChannelClogged) => {}, + error => panic!("invalid error: {error:?}"), + } + } } diff --git a/client/litep2p/src/protocol/libp2p/bitswap/config.rs b/client/litep2p/src/protocol/libp2p/bitswap/config.rs index b5ce71a4..98abf20e 100644 --- a/client/litep2p/src/protocol/libp2p/bitswap/config.rs +++ b/client/litep2p/src/protocol/libp2p/bitswap/config.rs @@ -19,10 +19,10 @@ // DEALINGS IN THE SOFTWARE. use crate::{ - codec::ProtocolCodec, - protocol::libp2p::bitswap::{BitswapCommand, BitswapEvent, BitswapHandle}, - types::protocol::ProtocolName, - DEFAULT_CHANNEL_SIZE, + codec::ProtocolCodec, + protocol::libp2p::bitswap::{BitswapCommand, BitswapEvent, BitswapHandle}, + types::protocol::ProtocolName, + DEFAULT_CHANNEL_SIZE, }; use tokio::sync::mpsc::{channel, Receiver, Sender}; @@ -41,33 +41,33 @@ pub const MAX_BATCH_SIZE: usize = 2 * 1024 * 1024; /// Bitswap configuration. #[derive(Debug)] pub struct Config { - /// Protocol name. - pub(crate) protocol: ProtocolName, + /// Protocol name. + pub(crate) protocol: ProtocolName, - /// Protocol codec. - pub(crate) codec: ProtocolCodec, + /// Protocol codec. + pub(crate) codec: ProtocolCodec, - /// TX channel for sending events to the user protocol. - pub(super) event_tx: Sender, + /// TX channel for sending events to the user protocol. + pub(super) event_tx: Sender, - /// RX channel for receiving commands from the user. - pub(super) cmd_rx: Receiver, + /// RX channel for receiving commands from the user. + pub(super) cmd_rx: Receiver, } impl Config { - /// Create new [`Config`]. - pub fn new() -> (Self, BitswapHandle) { - let (event_tx, event_rx) = channel(DEFAULT_CHANNEL_SIZE); - let (cmd_tx, cmd_rx) = channel(DEFAULT_CHANNEL_SIZE); + /// Create new [`Config`]. + pub fn new() -> (Self, BitswapHandle) { + let (event_tx, event_rx) = channel(DEFAULT_CHANNEL_SIZE); + let (cmd_tx, cmd_rx) = channel(DEFAULT_CHANNEL_SIZE); - ( - Self { - cmd_rx, - event_tx, - protocol: ProtocolName::from(PROTOCOL_NAME), - codec: ProtocolCodec::UnsignedVarint(Some(MAX_MESSAGE_SIZE)), - }, - BitswapHandle::new(event_rx, cmd_tx), - ) - } + ( + Self { + cmd_rx, + event_tx, + protocol: ProtocolName::from(PROTOCOL_NAME), + codec: ProtocolCodec::UnsignedVarint(Some(MAX_MESSAGE_SIZE)), + }, + BitswapHandle::new(event_rx, cmd_tx), + ) + } } diff --git a/client/litep2p/src/protocol/libp2p/bitswap/handle.rs b/client/litep2p/src/protocol/libp2p/bitswap/handle.rs index 630c8d7f..6db43568 100644 --- a/client/litep2p/src/protocol/libp2p/bitswap/handle.rs +++ b/client/litep2p/src/protocol/libp2p/bitswap/handle.rs @@ -21,123 +21,123 @@ //! Bitswap handle for communicating with the bitswap protocol implementation. use crate::{ - protocol::libp2p::bitswap::{BlockPresenceType, WantType}, - PeerId, + protocol::libp2p::bitswap::{BlockPresenceType, WantType}, + PeerId, }; use cid::Cid; use tokio::sync::mpsc::{Receiver, Sender}; use std::{ - pin::Pin, - task::{Context, Poll}, + pin::Pin, + task::{Context, Poll}, }; /// Events emitted by the bitswap protocol. #[derive(Debug)] pub enum BitswapEvent { - /// Bitswap request. - Request { - /// Peer ID. - peer: PeerId, - - /// Requested CIDs. - cids: Vec<(Cid, WantType)>, - }, - - /// Bitswap response. - Response { - /// Peer ID. - peer: PeerId, - - /// Response entries: vector of CIDs with either block data or block presence. - responses: Vec, - }, + /// Bitswap request. + Request { + /// Peer ID. + peer: PeerId, + + /// Requested CIDs. + cids: Vec<(Cid, WantType)>, + }, + + /// Bitswap response. + Response { + /// Peer ID. + peer: PeerId, + + /// Response entries: vector of CIDs with either block data or block presence. + responses: Vec, + }, } /// Response type for received bitswap request. #[derive(Debug, Clone)] #[cfg_attr(feature = "fuzz", derive(serde::Serialize, serde::Deserialize))] pub enum ResponseType { - /// Block. - Block { - /// CID. - cid: Cid, - - /// Found block. - block: Vec, - }, - - /// Presense. - Presence { - /// CID. - cid: Cid, - - /// Whether the requested block exists or not. - presence: BlockPresenceType, - }, + /// Block. + Block { + /// CID. + cid: Cid, + + /// Found block. + block: Vec, + }, + + /// Presense. + Presence { + /// CID. + cid: Cid, + + /// Whether the requested block exists or not. + presence: BlockPresenceType, + }, } /// Commands sent from the user to `Bitswap`. #[derive(Debug)] #[cfg_attr(feature = "fuzz", derive(serde::Serialize, serde::Deserialize))] pub enum BitswapCommand { - /// Send bitswap request. - SendRequest { - /// Peer ID. - peer: PeerId, - - /// Requested CIDs. - cids: Vec<(Cid, WantType)>, - }, - - /// Send bitswap response. - SendResponse { - /// Peer ID. - peer: PeerId, - - /// CIDs. - responses: Vec, - }, + /// Send bitswap request. + SendRequest { + /// Peer ID. + peer: PeerId, + + /// Requested CIDs. + cids: Vec<(Cid, WantType)>, + }, + + /// Send bitswap response. + SendResponse { + /// Peer ID. + peer: PeerId, + + /// CIDs. + responses: Vec, + }, } /// Handle for communicating with the bitswap protocol. pub struct BitswapHandle { - /// RX channel for receiving bitswap events. - event_rx: Receiver, + /// RX channel for receiving bitswap events. + event_rx: Receiver, - /// TX channel for sending commads to `Bitswap`. - cmd_tx: Sender, + /// TX channel for sending commads to `Bitswap`. + cmd_tx: Sender, } impl BitswapHandle { - /// Create new [`BitswapHandle`]. - pub(super) fn new(event_rx: Receiver, cmd_tx: Sender) -> Self { - Self { event_rx, cmd_tx } - } - - /// Send `request` to `peer`. - pub async fn send_request(&self, peer: PeerId, cids: Vec<(Cid, WantType)>) { - let _ = self.cmd_tx.send(BitswapCommand::SendRequest { peer, cids }).await; - } - - /// Send `response` to `peer`. - pub async fn send_response(&self, peer: PeerId, responses: Vec) { - let _ = self.cmd_tx.send(BitswapCommand::SendResponse { peer, responses }).await; - } - - #[cfg(feature = "fuzz")] - /// Expose functionality for fuzzing - pub async fn fuzz_send_message(&mut self, command: BitswapCommand) -> crate::Result<()> { - let _ = self.cmd_tx.try_send(command); - Ok(()) - } + /// Create new [`BitswapHandle`]. + pub(super) fn new(event_rx: Receiver, cmd_tx: Sender) -> Self { + Self { event_rx, cmd_tx } + } + + /// Send `request` to `peer`. + pub async fn send_request(&self, peer: PeerId, cids: Vec<(Cid, WantType)>) { + let _ = self.cmd_tx.send(BitswapCommand::SendRequest { peer, cids }).await; + } + + /// Send `response` to `peer`. + pub async fn send_response(&self, peer: PeerId, responses: Vec) { + let _ = self.cmd_tx.send(BitswapCommand::SendResponse { peer, responses }).await; + } + + #[cfg(feature = "fuzz")] + /// Expose functionality for fuzzing + pub async fn fuzz_send_message(&mut self, command: BitswapCommand) -> crate::Result<()> { + let _ = self.cmd_tx.try_send(command); + Ok(()) + } } impl futures::Stream for BitswapHandle { - type Item = BitswapEvent; + type Item = BitswapEvent; - fn poll_next(mut self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll> { - Pin::new(&mut self.event_rx).poll_recv(cx) - } + fn poll_next(mut self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll> { + Pin::new(&mut self.event_rx).poll_recv(cx) + } } diff --git a/client/litep2p/src/protocol/libp2p/bitswap/mod.rs b/client/litep2p/src/protocol/libp2p/bitswap/mod.rs index 9c4cac9c..295081a5 100644 --- a/client/litep2p/src/protocol/libp2p/bitswap/mod.rs +++ b/client/litep2p/src/protocol/libp2p/bitswap/mod.rs @@ -21,14 +21,14 @@ //! [`/ipfs/bitswap/1.2.0`](https://github.com/ipfs/specs/blob/main/BITSWAP.md) implementation. use crate::{ - error::{Error, ImmediateDialError}, - protocol::{Direction, TransportEvent, TransportService}, - substream::Substream, - types::{ - multihash::{Code, MultihashDigest}, - SubstreamId, - }, - PeerId, + error::{Error, ImmediateDialError}, + protocol::{Direction, TransportEvent, TransportService}, + substream::Substream, + types::{ + multihash::{Code, MultihashDigest}, + SubstreamId, + }, + PeerId, }; use bytes::Bytes; @@ -41,17 +41,17 @@ pub use config::Config; pub use handle::{BitswapCommand, BitswapEvent, BitswapHandle, ResponseType}; pub use schema::bitswap::{wantlist::WantType, BlockPresenceType}; use std::{ - collections::{hash_map::Entry, vec_deque::Drain, HashMap, HashSet, VecDeque}, - time::Duration, + collections::{hash_map::Entry, vec_deque::Drain, HashMap, HashSet, VecDeque}, + time::Duration, }; mod config; mod handle; mod schema { - pub(super) mod bitswap { - include!(concat!(env!("OUT_DIR"), "/bitswap.rs")); - } + pub(super) mod bitswap { + include!(concat!(env!("OUT_DIR"), "/bitswap.rs")); + } } /// Log target for the file. @@ -63,757 +63,728 @@ const WRITE_TIMEOUT: Duration = Duration::from_secs(15); /// Bitswap metadata. #[derive(Debug)] struct Prefix { - /// CID version. - version: Version, + /// CID version. + version: Version, - /// CID codec. - codec: u64, + /// CID codec. + codec: u64, - /// CID multihash type. - multihash_type: u64, + /// CID multihash type. + multihash_type: u64, - /// CID multihash length. - multihash_len: u8, + /// CID multihash length. + multihash_len: u8, } impl Prefix { - /// Convert the prefix to encoded bytes. - pub fn to_bytes(&self) -> Vec { - let mut res = Vec::with_capacity(4 * 10); - - let mut buf = unsigned_varint::encode::u64_buffer(); - let version = unsigned_varint::encode::u64(self.version.into(), &mut buf); - res.extend_from_slice(version); - - let mut buf = unsigned_varint::encode::u64_buffer(); - let codec = unsigned_varint::encode::u64(self.codec, &mut buf); - res.extend_from_slice(codec); - - let mut buf = unsigned_varint::encode::u64_buffer(); - let multihash_type = unsigned_varint::encode::u64(self.multihash_type, &mut buf); - res.extend_from_slice(multihash_type); - - let mut buf = unsigned_varint::encode::u64_buffer(); - let multihash_len = unsigned_varint::encode::u64(self.multihash_len as u64, &mut buf); - res.extend_from_slice(multihash_len); - res - } - - /// Parse byte representation of prefix. - pub fn from_bytes(prefix_bytes: &[u8]) -> Option { - let (version, rest) = unsigned_varint::decode::u64(prefix_bytes).ok()?; - let (codec, rest) = unsigned_varint::decode::u64(rest).ok()?; - let (multihash_type, rest) = unsigned_varint::decode::u64(rest).ok()?; - let (multihash_len, rest) = unsigned_varint::decode::u64(rest).ok()?; - if !rest.is_empty() { - return None; - } - - let version = Version::try_from(version).ok()?; - let multihash_len = u8::try_from(multihash_len).ok()?; - - Some(Prefix { - version, - codec, - multihash_type, - multihash_len, - }) - } + /// Convert the prefix to encoded bytes. + pub fn to_bytes(&self) -> Vec { + let mut res = Vec::with_capacity(4 * 10); + + let mut buf = unsigned_varint::encode::u64_buffer(); + let version = unsigned_varint::encode::u64(self.version.into(), &mut buf); + res.extend_from_slice(version); + + let mut buf = unsigned_varint::encode::u64_buffer(); + let codec = unsigned_varint::encode::u64(self.codec, &mut buf); + res.extend_from_slice(codec); + + let mut buf = unsigned_varint::encode::u64_buffer(); + let multihash_type = unsigned_varint::encode::u64(self.multihash_type, &mut buf); + res.extend_from_slice(multihash_type); + + let mut buf = unsigned_varint::encode::u64_buffer(); + let multihash_len = unsigned_varint::encode::u64(self.multihash_len as u64, &mut buf); + res.extend_from_slice(multihash_len); + res + } + + /// Parse byte representation of prefix. + pub fn from_bytes(prefix_bytes: &[u8]) -> Option { + let (version, rest) = unsigned_varint::decode::u64(prefix_bytes).ok()?; + let (codec, rest) = unsigned_varint::decode::u64(rest).ok()?; + let (multihash_type, rest) = unsigned_varint::decode::u64(rest).ok()?; + let (multihash_len, rest) = unsigned_varint::decode::u64(rest).ok()?; + if !rest.is_empty() { + return None; + } + + let version = Version::try_from(version).ok()?; + let multihash_len = u8::try_from(multihash_len).ok()?; + + Some(Prefix { version, codec, multihash_type, multihash_len }) + } } /// Action to perform when substream is opened. #[derive(Debug)] enum SubstreamAction { - /// Send a request. - SendRequest(Vec<(Cid, WantType)>), - /// Send a response. - SendResponse(Vec), + /// Send a request. + SendRequest(Vec<(Cid, WantType)>), + /// Send a response. + SendResponse(Vec), } /// Bitswap protocol. pub(crate) struct Bitswap { - // Connection service. - service: TransportService, + // Connection service. + service: TransportService, - /// TX channel for sending events to the user protocol. - event_tx: Sender, + /// TX channel for sending events to the user protocol. + event_tx: Sender, - /// RX channel for receiving commands from `BitswapHandle`. - cmd_rx: Receiver, + /// RX channel for receiving commands from `BitswapHandle`. + cmd_rx: Receiver, - /// Pending outbound actions. - pending_outbound: HashMap>, + /// Pending outbound actions. + pending_outbound: HashMap>, - /// Inbound substreams. - inbound: StreamMap, + /// Inbound substreams. + inbound: StreamMap, - /// Outbound substreams. - outbound: HashMap, + /// Outbound substreams. + outbound: HashMap, - /// Peers waiting for dial. - pending_dials: HashSet, + /// Peers waiting for dial. + pending_dials: HashSet, } impl Bitswap { - /// Create new [`Bitswap`] protocol. - pub(crate) fn new(service: TransportService, config: Config) -> Self { - Self { - service, - cmd_rx: config.cmd_rx, - event_tx: config.event_tx, - pending_outbound: HashMap::new(), - inbound: StreamMap::new(), - outbound: HashMap::new(), - pending_dials: HashSet::new(), - } - } - - /// Substream opened to remote peer. - fn on_inbound_substream(&mut self, peer: PeerId, substream: Substream) { - tracing::debug!(target: LOG_TARGET, ?peer, "handle inbound substream"); - - if self.inbound.insert(peer, substream).is_some() { - // Only one inbound substream per peer is allowed in order to constrain resources. - tracing::debug!( - target: LOG_TARGET, - ?peer, - "dropping inbound substream as remote opened a new one", - ); - } - } - - /// Message received from remote peer. - async fn on_message_received( - &mut self, - peer: PeerId, - message: bytes::BytesMut, - ) -> Result<(), Error> { - tracing::trace!(target: LOG_TARGET, ?peer, "handle inbound message"); - - let message = schema::bitswap::Message::decode(message)?; - - // Check if this is a request (has wantlist with entries). - if let Some(wantlist) = &message.wantlist { - if !wantlist.entries.is_empty() { - let cids = wantlist - .entries - .iter() - .filter_map(|entry| { - let cid = Cid::read_bytes(entry.block.as_slice()).ok()?; - - let want_type = match entry.want_type { - 0 => WantType::Block, - 1 => WantType::Have, - _ => return None, - }; - - Some((cid, want_type)) - }) - .collect::>(); - - if !cids.is_empty() { - let _ = self.event_tx.send(BitswapEvent::Request { peer, cids }).await; - } - } - } - - // Check if this is a response (has payload or block presences). - if !message.payload.is_empty() || !message.block_presences.is_empty() { - let mut responses = Vec::new(); - - // Process payload (blocks). - for block in message.payload { - let Some(Prefix { - version, - codec, - multihash_type, - multihash_len: _, - }) = Prefix::from_bytes(&block.prefix) - else { - tracing::trace!(target: LOG_TARGET, ?peer, "invalid CID prefix received"); - continue; - }; - - // Create multihash from the block data. - let Ok(code) = Code::try_from(multihash_type) else { - tracing::trace!( - target: LOG_TARGET, - ?peer, - multihash_type, - "usupported multihash type", - ); - continue; - }; - - let multihash = code.digest(&block.data); - - // We need to convert multihash to version supported by `cid` crate. - let Ok(multihash) = - cid::multihash::Multihash::wrap(multihash.code(), multihash.digest()) - else { - tracing::trace!( - target: LOG_TARGET, - ?peer, - multihash_type, - "multihash size > 64 unsupported", - ); - continue; - }; - - match Cid::new(version, codec, multihash) { - Ok(cid) => responses.push(ResponseType::Block { - cid, - block: block.data, - }), - Err(error) => tracing::trace!( - target: LOG_TARGET, - ?peer, - ?error, - "invalid CID received", - ), - } - } - - // Process block presences. - for presence in message.block_presences { - if let Ok(cid) = Cid::read_bytes(&presence.cid[..]) { - let presence_type = match presence.r#type { - 0 => BlockPresenceType::Have, - 1 => BlockPresenceType::DontHave, - _ => continue, - }; - - responses.push(ResponseType::Presence { - cid, - presence: presence_type, - }); - } - } - - if !responses.is_empty() { - let _ = self.event_tx.send(BitswapEvent::Response { peer, responses }).await; - } - } - - Ok(()) - } - - /// Handle opened outbound substream. - async fn on_outbound_substream( - &mut self, - peer: PeerId, - substream_id: SubstreamId, - mut substream: Substream, - ) { - let Some(actions) = self.pending_outbound.remove(&peer) else { - tracing::warn!(target: LOG_TARGET, ?peer, ?substream_id, "pending outbound entry doesn't exist"); - return; - }; - - tracing::trace!(target: LOG_TARGET, ?peer, "handle outbound substream"); - - for action in actions { - match action { - SubstreamAction::SendRequest(cids) => { - if let Err(error) = send_request(&mut substream, cids).await { - // Drop the substream and all actions in case of sending error. - tracing::debug!(target: LOG_TARGET, ?peer, ?error, "bitswap request failed"); - return; - } - } - SubstreamAction::SendResponse(entries) => { - if let Err(error) = send_response(&mut substream, entries).await { - // Drop the substream and all actions in case of sending error. - tracing::debug!(target: LOG_TARGET, ?peer, ?error, "bitswap response failed"); - return; - } - } - } - } - - self.outbound.insert(peer, substream); - } - - /// Handle connection established event. - fn on_connection_established(&mut self, peer: PeerId) { - // If we have pending actions for this peer, open a substream. - if self.pending_dials.remove(&peer) { - tracing::trace!( - target: LOG_TARGET, - ?peer, - "open substream after connection established", - ); - - if let Err(error) = self.service.open_substream(peer) { - tracing::debug!( - target: LOG_TARGET, - ?peer, - ?error, - "failed to open substream after connection established", - ); - // Drop all pending actions; they are not going to be handled anyway, and we need - // the entry to be empty to properly open subsequent substreams. - self.pending_outbound.remove(&peer); - } - } - } - - /// Open substream or dial a peer. - fn open_substream_or_dial(&mut self, peer: PeerId) { - tracing::trace!(target: LOG_TARGET, ?peer, "open substream"); - - if let Err(error) = self.service.open_substream(peer) { - tracing::trace!( - target: LOG_TARGET, - ?peer, - ?error, - "failed to open substream, dialing peer", - ); - - // Failed to open substream, try to dial the peer. - match self.service.dial(&peer) { - Ok(()) => { - // Store the peer to open a substream once it is connected. - self.pending_dials.insert(peer); - } - Err(ImmediateDialError::AlreadyConnected) => { - // By the time we tried to dial peer, it got connected. - if let Err(error) = self.service.open_substream(peer) { - tracing::trace!( - target: LOG_TARGET, - ?peer, - ?error, - "failed to open substream for a second time", - ); - } - } - Err(error) => { - tracing::debug!(target: LOG_TARGET, ?peer, ?error, "failed to dial peer"); - } - } - } - } - - /// Handle bitswap request. - async fn on_bitswap_request(&mut self, peer: PeerId, cids: Vec<(Cid, WantType)>) { - // Try to send request over existing substream first. - if let Entry::Occupied(mut entry) = self.outbound.entry(peer) { - if send_request(entry.get_mut(), cids.clone()).await.is_ok() { - return; - } else { - tracing::debug!( - target: LOG_TARGET, - ?peer, - "failed to send request over existing substream", - ); - entry.remove(); - } - } - - // Store pending actions for once the substream is opened. - let pending_actions = self.pending_outbound.entry(peer).or_default(); - // If we inserted the default empty entry above, this means no pending substream - // was requested by previous calls to `on_bitswap_request`. We will request a substream - // in this case below. - let no_substream_pending = pending_actions.is_empty(); - - pending_actions.push(SubstreamAction::SendRequest(cids)); - - if no_substream_pending { - self.open_substream_or_dial(peer); - } - } - - /// Handle bitswap response. - async fn on_bitswap_response(&mut self, peer: PeerId, responses: Vec) { - // Try to send response over existing substream first. - if let Entry::Occupied(mut entry) = self.outbound.entry(peer) { - if send_response(entry.get_mut(), responses.clone()).await.is_ok() { - return; - } else { - tracing::debug!( - target: LOG_TARGET, - ?peer, - "failed to send response over existing substream", - ); - entry.remove(); - } - } - - // Store pending actions for later and open substream if not requested already. - let pending_actions = self.pending_outbound.entry(peer).or_default(); - let no_pending_substream = pending_actions.is_empty(); - pending_actions.push(SubstreamAction::SendResponse(responses)); - - if no_pending_substream { - self.open_substream_or_dial(peer); - } - } - - /// Start [`Bitswap`] event loop. - pub async fn run(mut self) { - tracing::debug!(target: LOG_TARGET, "starting bitswap event loop"); - - loop { - tokio::select! { - event = self.service.next() => match event { - Some(TransportEvent::ConnectionEstablished { peer, .. }) => { - self.on_connection_established(peer); - } - Some(TransportEvent::SubstreamOpened { - peer, - substream, - direction, - .. - }) => match direction { - Direction::Inbound => self.on_inbound_substream(peer, substream), - Direction::Outbound(substream_id) => - self.on_outbound_substream(peer, substream_id, substream).await, - }, - None => return, - event => tracing::trace!(target: LOG_TARGET, ?event, "unhandled event"), - }, - command = self.cmd_rx.recv() => match command { - Some(BitswapCommand::SendRequest { peer, cids }) => { - self.on_bitswap_request(peer, cids).await; - } - Some(BitswapCommand::SendResponse { peer, responses }) => { - self.on_bitswap_response(peer, responses).await; - } - None => return, - }, - Some((peer, message)) = self.inbound.next(), if !self.inbound.is_empty() => { - match message { - Ok(message) => if let Err(e) = self.on_message_received(peer, message).await { - tracing::trace!( - target: LOG_TARGET, - ?peer, - ?e, - "error handling inbound message, dropping substream", - ); - self.inbound.remove(&peer); - }, - Err(e) => { - tracing::trace!( - target: LOG_TARGET, - ?peer, - ?e, - "inbound substream closed", - ); - self.inbound.remove(&peer); - }, - } - } - } - } - } + /// Create new [`Bitswap`] protocol. + pub(crate) fn new(service: TransportService, config: Config) -> Self { + Self { + service, + cmd_rx: config.cmd_rx, + event_tx: config.event_tx, + pending_outbound: HashMap::new(), + inbound: StreamMap::new(), + outbound: HashMap::new(), + pending_dials: HashSet::new(), + } + } + + /// Substream opened to remote peer. + fn on_inbound_substream(&mut self, peer: PeerId, substream: Substream) { + tracing::debug!(target: LOG_TARGET, ?peer, "handle inbound substream"); + + if self.inbound.insert(peer, substream).is_some() { + // Only one inbound substream per peer is allowed in order to constrain resources. + tracing::debug!( + target: LOG_TARGET, + ?peer, + "dropping inbound substream as remote opened a new one", + ); + } + } + + /// Message received from remote peer. + async fn on_message_received( + &mut self, + peer: PeerId, + message: bytes::BytesMut, + ) -> Result<(), Error> { + tracing::trace!(target: LOG_TARGET, ?peer, "handle inbound message"); + + let message = schema::bitswap::Message::decode(message)?; + + // Check if this is a request (has wantlist with entries). + if let Some(wantlist) = &message.wantlist { + if !wantlist.entries.is_empty() { + let cids = wantlist + .entries + .iter() + .filter_map(|entry| { + let cid = Cid::read_bytes(entry.block.as_slice()).ok()?; + + let want_type = match entry.want_type { + 0 => WantType::Block, + 1 => WantType::Have, + _ => return None, + }; + + Some((cid, want_type)) + }) + .collect::>(); + + if !cids.is_empty() { + let _ = self.event_tx.send(BitswapEvent::Request { peer, cids }).await; + } + } + } + + // Check if this is a response (has payload or block presences). + if !message.payload.is_empty() || !message.block_presences.is_empty() { + let mut responses = Vec::new(); + + // Process payload (blocks). + for block in message.payload { + let Some(Prefix { version, codec, multihash_type, multihash_len: _ }) = + Prefix::from_bytes(&block.prefix) + else { + tracing::trace!(target: LOG_TARGET, ?peer, "invalid CID prefix received"); + continue; + }; + + // Create multihash from the block data. + let Ok(code) = Code::try_from(multihash_type) else { + tracing::trace!( + target: LOG_TARGET, + ?peer, + multihash_type, + "usupported multihash type", + ); + continue; + }; + + let multihash = code.digest(&block.data); + + // We need to convert multihash to version supported by `cid` crate. + let Ok(multihash) = + cid::multihash::Multihash::wrap(multihash.code(), multihash.digest()) + else { + tracing::trace!( + target: LOG_TARGET, + ?peer, + multihash_type, + "multihash size > 64 unsupported", + ); + continue; + }; + + match Cid::new(version, codec, multihash) { + Ok(cid) => responses.push(ResponseType::Block { cid, block: block.data }), + Err(error) => tracing::trace!( + target: LOG_TARGET, + ?peer, + ?error, + "invalid CID received", + ), + } + } + + // Process block presences. + for presence in message.block_presences { + if let Ok(cid) = Cid::read_bytes(&presence.cid[..]) { + let presence_type = match presence.r#type { + 0 => BlockPresenceType::Have, + 1 => BlockPresenceType::DontHave, + _ => continue, + }; + + responses.push(ResponseType::Presence { cid, presence: presence_type }); + } + } + + if !responses.is_empty() { + let _ = self.event_tx.send(BitswapEvent::Response { peer, responses }).await; + } + } + + Ok(()) + } + + /// Handle opened outbound substream. + async fn on_outbound_substream( + &mut self, + peer: PeerId, + substream_id: SubstreamId, + mut substream: Substream, + ) { + let Some(actions) = self.pending_outbound.remove(&peer) else { + tracing::warn!(target: LOG_TARGET, ?peer, ?substream_id, "pending outbound entry doesn't exist"); + return; + }; + + tracing::trace!(target: LOG_TARGET, ?peer, "handle outbound substream"); + + for action in actions { + match action { + SubstreamAction::SendRequest(cids) => { + if let Err(error) = send_request(&mut substream, cids).await { + // Drop the substream and all actions in case of sending error. + tracing::debug!(target: LOG_TARGET, ?peer, ?error, "bitswap request failed"); + return; + } + }, + SubstreamAction::SendResponse(entries) => { + if let Err(error) = send_response(&mut substream, entries).await { + // Drop the substream and all actions in case of sending error. + tracing::debug!(target: LOG_TARGET, ?peer, ?error, "bitswap response failed"); + return; + } + }, + } + } + + self.outbound.insert(peer, substream); + } + + /// Handle connection established event. + fn on_connection_established(&mut self, peer: PeerId) { + // If we have pending actions for this peer, open a substream. + if self.pending_dials.remove(&peer) { + tracing::trace!( + target: LOG_TARGET, + ?peer, + "open substream after connection established", + ); + + if let Err(error) = self.service.open_substream(peer) { + tracing::debug!( + target: LOG_TARGET, + ?peer, + ?error, + "failed to open substream after connection established", + ); + // Drop all pending actions; they are not going to be handled anyway, and we need + // the entry to be empty to properly open subsequent substreams. + self.pending_outbound.remove(&peer); + } + } + } + + /// Open substream or dial a peer. + fn open_substream_or_dial(&mut self, peer: PeerId) { + tracing::trace!(target: LOG_TARGET, ?peer, "open substream"); + + if let Err(error) = self.service.open_substream(peer) { + tracing::trace!( + target: LOG_TARGET, + ?peer, + ?error, + "failed to open substream, dialing peer", + ); + + // Failed to open substream, try to dial the peer. + match self.service.dial(&peer) { + Ok(()) => { + // Store the peer to open a substream once it is connected. + self.pending_dials.insert(peer); + }, + Err(ImmediateDialError::AlreadyConnected) => { + // By the time we tried to dial peer, it got connected. + if let Err(error) = self.service.open_substream(peer) { + tracing::trace!( + target: LOG_TARGET, + ?peer, + ?error, + "failed to open substream for a second time", + ); + } + }, + Err(error) => { + tracing::debug!(target: LOG_TARGET, ?peer, ?error, "failed to dial peer"); + }, + } + } + } + + /// Handle bitswap request. + async fn on_bitswap_request(&mut self, peer: PeerId, cids: Vec<(Cid, WantType)>) { + // Try to send request over existing substream first. + if let Entry::Occupied(mut entry) = self.outbound.entry(peer) { + if send_request(entry.get_mut(), cids.clone()).await.is_ok() { + return; + } else { + tracing::debug!( + target: LOG_TARGET, + ?peer, + "failed to send request over existing substream", + ); + entry.remove(); + } + } + + // Store pending actions for once the substream is opened. + let pending_actions = self.pending_outbound.entry(peer).or_default(); + // If we inserted the default empty entry above, this means no pending substream + // was requested by previous calls to `on_bitswap_request`. We will request a substream + // in this case below. + let no_substream_pending = pending_actions.is_empty(); + + pending_actions.push(SubstreamAction::SendRequest(cids)); + + if no_substream_pending { + self.open_substream_or_dial(peer); + } + } + + /// Handle bitswap response. + async fn on_bitswap_response(&mut self, peer: PeerId, responses: Vec) { + // Try to send response over existing substream first. + if let Entry::Occupied(mut entry) = self.outbound.entry(peer) { + if send_response(entry.get_mut(), responses.clone()).await.is_ok() { + return; + } else { + tracing::debug!( + target: LOG_TARGET, + ?peer, + "failed to send response over existing substream", + ); + entry.remove(); + } + } + + // Store pending actions for later and open substream if not requested already. + let pending_actions = self.pending_outbound.entry(peer).or_default(); + let no_pending_substream = pending_actions.is_empty(); + pending_actions.push(SubstreamAction::SendResponse(responses)); + + if no_pending_substream { + self.open_substream_or_dial(peer); + } + } + + /// Start [`Bitswap`] event loop. + pub async fn run(mut self) { + tracing::debug!(target: LOG_TARGET, "starting bitswap event loop"); + + loop { + tokio::select! { + event = self.service.next() => match event { + Some(TransportEvent::ConnectionEstablished { peer, .. }) => { + self.on_connection_established(peer); + } + Some(TransportEvent::SubstreamOpened { + peer, + substream, + direction, + .. + }) => match direction { + Direction::Inbound => self.on_inbound_substream(peer, substream), + Direction::Outbound(substream_id) => + self.on_outbound_substream(peer, substream_id, substream).await, + }, + None => return, + event => tracing::trace!(target: LOG_TARGET, ?event, "unhandled event"), + }, + command = self.cmd_rx.recv() => match command { + Some(BitswapCommand::SendRequest { peer, cids }) => { + self.on_bitswap_request(peer, cids).await; + } + Some(BitswapCommand::SendResponse { peer, responses }) => { + self.on_bitswap_response(peer, responses).await; + } + None => return, + }, + Some((peer, message)) = self.inbound.next(), if !self.inbound.is_empty() => { + match message { + Ok(message) => if let Err(e) = self.on_message_received(peer, message).await { + tracing::trace!( + target: LOG_TARGET, + ?peer, + ?e, + "error handling inbound message, dropping substream", + ); + self.inbound.remove(&peer); + }, + Err(e) => { + tracing::trace!( + target: LOG_TARGET, + ?peer, + ?e, + "inbound substream closed", + ); + self.inbound.remove(&peer); + }, + } + } + } + } + } } async fn send_request(substream: &mut Substream, cids: Vec<(Cid, WantType)>) -> Result<(), Error> { - let request = schema::bitswap::Message { - wantlist: Some(schema::bitswap::Wantlist { - entries: cids - .into_iter() - .map(|(cid, want_type)| schema::bitswap::wantlist::Entry { - block: cid.to_bytes(), - priority: 1, - cancel: false, - want_type: want_type as i32, - send_dont_have: false, - }) - .collect(), - full: false, - }), - ..Default::default() - }; - - let message = request.encode_to_vec().into(); - match tokio::time::timeout(WRITE_TIMEOUT, substream.send_framed(message)).await { - Err(_) => Err(Error::Timeout), - Ok(Err(e)) => Err(Error::SubstreamError(e)), - Ok(Ok(())) => Ok(()), - } + let request = schema::bitswap::Message { + wantlist: Some(schema::bitswap::Wantlist { + entries: cids + .into_iter() + .map(|(cid, want_type)| schema::bitswap::wantlist::Entry { + block: cid.to_bytes(), + priority: 1, + cancel: false, + want_type: want_type as i32, + send_dont_have: false, + }) + .collect(), + full: false, + }), + ..Default::default() + }; + + let message = request.encode_to_vec().into(); + match tokio::time::timeout(WRITE_TIMEOUT, substream.send_framed(message)).await { + Err(_) => Err(Error::Timeout), + Ok(Err(e)) => Err(Error::SubstreamError(e)), + Ok(Ok(())) => Ok(()), + } } async fn send_response(substream: &mut Substream, entries: Vec) -> Result<(), Error> { - // Send presences in a separate message to not deal with it when batching blocks below. - if let Some((message, cid_count)) = - presences_message(entries.iter().filter_map(|entry| match entry { - ResponseType::Presence { cid, presence } => Some((*cid, *presence)), - ResponseType::Block { .. } => None, - })) - { - if message.len() <= config::MAX_MESSAGE_SIZE { - tracing::trace!( - target: LOG_TARGET, - cid_count, - "sending Bitswap presence message", - ); - match tokio::time::timeout(WRITE_TIMEOUT, substream.send_framed(message)).await { - Err(_) => return Err(Error::Timeout), - Ok(Err(e)) => return Err(Error::SubstreamError(e)), - Ok(Ok(())) => {} - } - } else { - // This should never happen in practice, but log a warning if the presence message - // exceeded [`config::MAX_MESSAGE_SIZE`]. - tracing::warn!( - target: LOG_TARGET, - size = message.len(), - max_size = config::MAX_MESSAGE_SIZE, - "outgoing Bitswap presence message exceeded max size", - ); - } - } - - // Send blocks in batches of up to [`config::MAX_BATCH_SIZE`] bytes. - let mut blocks = entries - .into_iter() - .filter_map(|entry| match entry { - ResponseType::Block { cid, block } => Some((cid, block)), - ResponseType::Presence { .. } => None, - }) - .collect::>(); - - while let Some(batch) = extract_next_batch(&mut blocks, config::MAX_BATCH_SIZE) { - if let Some((message, block_count)) = blocks_message(batch) { - if message.len() <= config::MAX_MESSAGE_SIZE { - tracing::trace!( - target: LOG_TARGET, - block_count, - "sending Bitswap blocks message", - ); - match tokio::time::timeout(WRITE_TIMEOUT, substream.send_framed(message)).await { - Err(_) => return Err(Error::Timeout), - Ok(Err(e)) => return Err(Error::SubstreamError(e)), - Ok(Ok(())) => {} - } - } else { - // This should never happen in practice, but log a warning if the blocks message - // exceeded [`config::MAX_MESSAGE_SIZE`]. - tracing::warn!( - target: LOG_TARGET, - size = message.len(), - max_size = config::MAX_MESSAGE_SIZE, - "outgoing Bitswap blocks message exceeded max size", - ); - } - } - } - - Ok(()) + // Send presences in a separate message to not deal with it when batching blocks below. + if let Some((message, cid_count)) = + presences_message(entries.iter().filter_map(|entry| match entry { + ResponseType::Presence { cid, presence } => Some((*cid, *presence)), + ResponseType::Block { .. } => None, + })) { + if message.len() <= config::MAX_MESSAGE_SIZE { + tracing::trace!( + target: LOG_TARGET, + cid_count, + "sending Bitswap presence message", + ); + match tokio::time::timeout(WRITE_TIMEOUT, substream.send_framed(message)).await { + Err(_) => return Err(Error::Timeout), + Ok(Err(e)) => return Err(Error::SubstreamError(e)), + Ok(Ok(())) => {}, + } + } else { + // This should never happen in practice, but log a warning if the presence message + // exceeded [`config::MAX_MESSAGE_SIZE`]. + tracing::warn!( + target: LOG_TARGET, + size = message.len(), + max_size = config::MAX_MESSAGE_SIZE, + "outgoing Bitswap presence message exceeded max size", + ); + } + } + + // Send blocks in batches of up to [`config::MAX_BATCH_SIZE`] bytes. + let mut blocks = entries + .into_iter() + .filter_map(|entry| match entry { + ResponseType::Block { cid, block } => Some((cid, block)), + ResponseType::Presence { .. } => None, + }) + .collect::>(); + + while let Some(batch) = extract_next_batch(&mut blocks, config::MAX_BATCH_SIZE) { + if let Some((message, block_count)) = blocks_message(batch) { + if message.len() <= config::MAX_MESSAGE_SIZE { + tracing::trace!( + target: LOG_TARGET, + block_count, + "sending Bitswap blocks message", + ); + match tokio::time::timeout(WRITE_TIMEOUT, substream.send_framed(message)).await { + Err(_) => return Err(Error::Timeout), + Ok(Err(e)) => return Err(Error::SubstreamError(e)), + Ok(Ok(())) => {}, + } + } else { + // This should never happen in practice, but log a warning if the blocks message + // exceeded [`config::MAX_MESSAGE_SIZE`]. + tracing::warn!( + target: LOG_TARGET, + size = message.len(), + max_size = config::MAX_MESSAGE_SIZE, + "outgoing Bitswap blocks message exceeded max size", + ); + } + } + } + + Ok(()) } fn presences_message( - presences: impl IntoIterator, + presences: impl IntoIterator, ) -> Option<(Bytes, usize)> { - let message = schema::bitswap::Message { - // Set wantlist to not cause null pointer dereference in older versions of Kubo. - wantlist: Some(Default::default()), - block_presences: presences - .into_iter() - .map(|(cid, presence)| schema::bitswap::BlockPresence { - cid: cid.to_bytes(), - r#type: presence as i32, - }) - .collect(), - ..Default::default() - }; - - let count = message.block_presences.len(); - - (count > 0).then(|| (message.encode_to_vec().into(), count)) + let message = schema::bitswap::Message { + // Set wantlist to not cause null pointer dereference in older versions of Kubo. + wantlist: Some(Default::default()), + block_presences: presences + .into_iter() + .map(|(cid, presence)| schema::bitswap::BlockPresence { + cid: cid.to_bytes(), + r#type: presence as i32, + }) + .collect(), + ..Default::default() + }; + + let count = message.block_presences.len(); + + (count > 0).then(|| (message.encode_to_vec().into(), count)) } fn blocks_message(blocks: impl IntoIterator)>) -> Option<(Bytes, usize)> { - let message = schema::bitswap::Message { - // Set wantlist to not cause null pointer dereference in older versions of Kubo. - wantlist: Some(Default::default()), - payload: blocks - .into_iter() - .map(|(cid, block)| { - let prefix = Prefix { - version: cid.version(), - codec: cid.codec(), - multihash_type: cid.hash().code(), - multihash_len: cid.hash().size(), - } - .to_bytes(); - - schema::bitswap::Block { - prefix, - data: block, - } - }) - .collect(), - ..Default::default() - }; - - let count = message.payload.len(); - - (count > 0).then(|| (message.encode_to_vec().into(), count)) + let message = schema::bitswap::Message { + // Set wantlist to not cause null pointer dereference in older versions of Kubo. + wantlist: Some(Default::default()), + payload: blocks + .into_iter() + .map(|(cid, block)| { + let prefix = Prefix { + version: cid.version(), + codec: cid.codec(), + multihash_type: cid.hash().code(), + multihash_len: cid.hash().size(), + } + .to_bytes(); + + schema::bitswap::Block { prefix, data: block } + }) + .collect(), + ..Default::default() + }; + + let count = message.payload.len(); + + (count > 0).then(|| (message.encode_to_vec().into(), count)) } /// Extract a batch of blocks of no more than `max_size` from `blocks`. /// Returns `None` if no more blocks are left. fn extract_next_batch<'a>( - blocks: &'a mut VecDeque<(Cid, Vec)>, - max_batch_size: usize, + blocks: &'a mut VecDeque<(Cid, Vec)>, + max_batch_size: usize, ) -> Option)>> { - // Get rid of oversized blocks to not stall the processing by not being able to queue them. - loop { - if let Some(block) = blocks.front() { - if block.1.len() > max_batch_size { - tracing::warn!( - target: LOG_TARGET, - cid = block.0.to_string(), - size = block.1.len(), - max_batch_size, - "outgoing Bitswap block exceeded max batch size", - ); - blocks.pop_front(); - } else { - break; - } - } else { - return None; - } - } - - // Determine how many blocks we can batch. Note that we can always batch at least one - // block due to check above. - let mut total_size = 0; - let mut block_count = 0; - - for b in blocks.iter() { - let next_block_size = b.1.len(); - if total_size + next_block_size > max_batch_size { - break; - } - total_size += next_block_size; - block_count += 1; - } - - Some(blocks.drain(..block_count)) + // Get rid of oversized blocks to not stall the processing by not being able to queue them. + loop { + if let Some(block) = blocks.front() { + if block.1.len() > max_batch_size { + tracing::warn!( + target: LOG_TARGET, + cid = block.0.to_string(), + size = block.1.len(), + max_batch_size, + "outgoing Bitswap block exceeded max batch size", + ); + blocks.pop_front(); + } else { + break; + } + } else { + return None; + } + } + + // Determine how many blocks we can batch. Note that we can always batch at least one + // block due to check above. + let mut total_size = 0; + let mut block_count = 0; + + for b in blocks.iter() { + let next_block_size = b.1.len(); + if total_size + next_block_size > max_batch_size { + break; + } + total_size += next_block_size; + block_count += 1; + } + + Some(blocks.drain(..block_count)) } #[cfg(test)] mod tests { - use cid::multihash::Multihash; - - use super::*; - - fn cid(block: &[u8]) -> Cid { - let codec = 0x55; - let multihash = Code::Sha2_256.digest(block); - let multihash = - Multihash::wrap(multihash.code(), multihash.digest()).expect("to be valid multihash"); - - Cid::new_v1(codec, multihash) - } - - #[test] - fn extract_next_batch_fits_max_size() { - let max_size = 100; - - let block1 = vec![0x01; 10]; - let block2 = vec![0x02; 10]; - let block3 = vec![0x03; 10]; - - let blocks = vec![ - (cid(&block1), block1), - (cid(&block2), block2), - (cid(&block3), block3), - ]; - let mut blocks_deque = blocks.iter().cloned().collect::>(); - - let batch = extract_next_batch(&mut blocks_deque, max_size).unwrap(); - assert_eq!(batch.collect::>(), blocks); - - assert!(extract_next_batch(&mut blocks_deque, max_size).is_none()); - } - - #[test] - fn extract_next_batch_chunking_exact() { - let max_size = 20; - - let block1 = vec![0x01; 10]; - let block2 = vec![0x02; 10]; - let block3 = vec![0x03; 10]; - - let blocks = vec![ - (cid(&block1), block1.clone()), - (cid(&block2), block2.clone()), - (cid(&block3), block3.clone()), - ]; - let chunk1 = vec![ - (cid(&block1), block1.clone()), - (cid(&block2), block2.clone()), - ]; - let chunk2 = vec![(cid(&block3), block3.clone())]; - let mut blocks_deque = blocks.iter().cloned().collect::>(); - - let batch = extract_next_batch(&mut blocks_deque, max_size).unwrap(); - assert_eq!(batch.collect::>(), chunk1); - - let batch = extract_next_batch(&mut blocks_deque, max_size).unwrap(); - assert_eq!(batch.collect::>(), chunk2); - - assert!(extract_next_batch(&mut blocks_deque, max_size).is_none()); - } - - #[test] - fn extract_next_batch_chunking_less_than() { - let max_size = 20; - - let block1 = vec![0x01; 10]; - let block2 = vec![0x02; 9]; - let block3 = vec![0x03; 10]; - - let blocks = vec![ - (cid(&block1), block1.clone()), - (cid(&block2), block2.clone()), - (cid(&block3), block3.clone()), - ]; - let chunk1 = vec![ - (cid(&block1), block1.clone()), - (cid(&block2), block2.clone()), - ]; - let chunk2 = vec![(cid(&block3), block3.clone())]; - let mut blocks_deque = blocks.iter().cloned().collect::>(); - - let batch = extract_next_batch(&mut blocks_deque, max_size).unwrap(); - assert_eq!(batch.collect::>(), chunk1); - - let batch = extract_next_batch(&mut blocks_deque, max_size).unwrap(); - assert_eq!(batch.collect::>(), chunk2); - - assert!(extract_next_batch(&mut blocks_deque, max_size).is_none()); - } - - #[test] - fn extract_next_batch_oversized_blocks_discarded() { - let max_size = 20; - - let block1 = vec![0x01; 10]; - let block2 = vec![0x02; 101]; - let block3 = vec![0x03; 10]; - - let blocks = vec![ - (cid(&block1), block1.clone()), - (cid(&block2), block2.clone()), - (cid(&block3), block3.clone()), - ]; - let chunk1 = vec![(cid(&block1), block1.clone())]; - let chunk2 = vec![(cid(&block3), block3.clone())]; - let mut blocks_deque = blocks.iter().cloned().collect::>(); - - let batch = extract_next_batch(&mut blocks_deque, max_size).unwrap(); - assert_eq!(batch.collect::>(), chunk1); - - let batch = extract_next_batch(&mut blocks_deque, max_size).unwrap(); - assert_eq!(batch.collect::>(), chunk2); - - assert!(extract_next_batch(&mut blocks_deque, max_size).is_none()); - } + use cid::multihash::Multihash; + + use super::*; + + fn cid(block: &[u8]) -> Cid { + let codec = 0x55; + let multihash = Code::Sha2_256.digest(block); + let multihash = + Multihash::wrap(multihash.code(), multihash.digest()).expect("to be valid multihash"); + + Cid::new_v1(codec, multihash) + } + + #[test] + fn extract_next_batch_fits_max_size() { + let max_size = 100; + + let block1 = vec![0x01; 10]; + let block2 = vec![0x02; 10]; + let block3 = vec![0x03; 10]; + + let blocks = vec![(cid(&block1), block1), (cid(&block2), block2), (cid(&block3), block3)]; + let mut blocks_deque = blocks.iter().cloned().collect::>(); + + let batch = extract_next_batch(&mut blocks_deque, max_size).unwrap(); + assert_eq!(batch.collect::>(), blocks); + + assert!(extract_next_batch(&mut blocks_deque, max_size).is_none()); + } + + #[test] + fn extract_next_batch_chunking_exact() { + let max_size = 20; + + let block1 = vec![0x01; 10]; + let block2 = vec![0x02; 10]; + let block3 = vec![0x03; 10]; + + let blocks = vec![ + (cid(&block1), block1.clone()), + (cid(&block2), block2.clone()), + (cid(&block3), block3.clone()), + ]; + let chunk1 = vec![(cid(&block1), block1.clone()), (cid(&block2), block2.clone())]; + let chunk2 = vec![(cid(&block3), block3.clone())]; + let mut blocks_deque = blocks.iter().cloned().collect::>(); + + let batch = extract_next_batch(&mut blocks_deque, max_size).unwrap(); + assert_eq!(batch.collect::>(), chunk1); + + let batch = extract_next_batch(&mut blocks_deque, max_size).unwrap(); + assert_eq!(batch.collect::>(), chunk2); + + assert!(extract_next_batch(&mut blocks_deque, max_size).is_none()); + } + + #[test] + fn extract_next_batch_chunking_less_than() { + let max_size = 20; + + let block1 = vec![0x01; 10]; + let block2 = vec![0x02; 9]; + let block3 = vec![0x03; 10]; + + let blocks = vec![ + (cid(&block1), block1.clone()), + (cid(&block2), block2.clone()), + (cid(&block3), block3.clone()), + ]; + let chunk1 = vec![(cid(&block1), block1.clone()), (cid(&block2), block2.clone())]; + let chunk2 = vec![(cid(&block3), block3.clone())]; + let mut blocks_deque = blocks.iter().cloned().collect::>(); + + let batch = extract_next_batch(&mut blocks_deque, max_size).unwrap(); + assert_eq!(batch.collect::>(), chunk1); + + let batch = extract_next_batch(&mut blocks_deque, max_size).unwrap(); + assert_eq!(batch.collect::>(), chunk2); + + assert!(extract_next_batch(&mut blocks_deque, max_size).is_none()); + } + + #[test] + fn extract_next_batch_oversized_blocks_discarded() { + let max_size = 20; + + let block1 = vec![0x01; 10]; + let block2 = vec![0x02; 101]; + let block3 = vec![0x03; 10]; + + let blocks = vec![ + (cid(&block1), block1.clone()), + (cid(&block2), block2.clone()), + (cid(&block3), block3.clone()), + ]; + let chunk1 = vec![(cid(&block1), block1.clone())]; + let chunk2 = vec![(cid(&block3), block3.clone())]; + let mut blocks_deque = blocks.iter().cloned().collect::>(); + + let batch = extract_next_batch(&mut blocks_deque, max_size).unwrap(); + assert_eq!(batch.collect::>(), chunk1); + + let batch = extract_next_batch(&mut blocks_deque, max_size).unwrap(); + assert_eq!(batch.collect::>(), chunk2); + + assert!(extract_next_batch(&mut blocks_deque, max_size).is_none()); + } } diff --git a/client/litep2p/src/protocol/libp2p/identify.rs b/client/litep2p/src/protocol/libp2p/identify.rs index e0ee9a5e..a7ffe5a5 100644 --- a/client/litep2p/src/protocol/libp2p/identify.rs +++ b/client/litep2p/src/protocol/libp2p/identify.rs @@ -21,15 +21,15 @@ //! [`/ipfs/identify/1.0.0`](https://github.com/libp2p/specs/blob/master/identify/README.md) implementation. use crate::{ - codec::ProtocolCodec, - crypto::PublicKey, - error::{Error, SubstreamError}, - protocol::{Direction, TransportEvent, TransportService}, - substream::Substream, - transport::Endpoint, - types::{protocol::ProtocolName, SubstreamId}, - utils::futures_stream::FuturesStream, - PeerId, DEFAULT_CHANNEL_SIZE, + codec::ProtocolCodec, + crypto::PublicKey, + error::{Error, SubstreamError}, + protocol::{Direction, TransportEvent, TransportService}, + substream::Substream, + transport::Endpoint, + types::{protocol::ProtocolName, SubstreamId}, + utils::futures_stream::FuturesStream, + PeerId, DEFAULT_CHANNEL_SIZE, }; use futures::{future::BoxFuture, Stream, StreamExt}; @@ -39,8 +39,8 @@ use tokio::sync::mpsc::{channel, Sender}; use tokio_stream::wrappers::ReceiverStream; use std::{ - collections::{HashMap, HashSet}, - time::Duration, + collections::{HashMap, HashSet}, + time::Duration, }; /// Log target for the file. @@ -60,274 +60,274 @@ const DEFAULT_AGENT: &str = "litep2p/1.0.0"; const IDENTIFY_PAYLOAD_SIZE: usize = 4096; mod identify_schema { - include!(concat!(env!("OUT_DIR"), "/identify.rs")); + include!(concat!(env!("OUT_DIR"), "/identify.rs")); } /// Identify configuration. pub struct Config { - /// Protocol name. - pub(crate) protocol: ProtocolName, + /// Protocol name. + pub(crate) protocol: ProtocolName, - /// Codec used by the protocol. - pub(crate) codec: ProtocolCodec, + /// Codec used by the protocol. + pub(crate) codec: ProtocolCodec, - /// TX channel for sending events to the user protocol. - tx_event: Sender, + /// TX channel for sending events to the user protocol. + tx_event: Sender, - // Public key of the local node, filled by `Litep2p`. - pub(crate) public: Option, + // Public key of the local node, filled by `Litep2p`. + pub(crate) public: Option, - /// Protocols supported by the local node, filled by `Litep2p`. - pub(crate) protocols: Vec, + /// Protocols supported by the local node, filled by `Litep2p`. + pub(crate) protocols: Vec, - /// Protocol version. - pub(crate) protocol_version: String, + /// Protocol version. + pub(crate) protocol_version: String, - /// User agent. - pub(crate) user_agent: Option, + /// User agent. + pub(crate) user_agent: Option, } impl Config { - /// Create new [`Config`]. - /// - /// Returns a config that is given to `Litep2pConfig` and an event stream for - /// [`IdentifyEvent`]s. - pub fn new( - protocol_version: String, - user_agent: Option, - ) -> (Self, Box + Send + Unpin>) { - let (tx_event, rx_event) = channel(DEFAULT_CHANNEL_SIZE); - - ( - Self { - tx_event, - public: None, - protocol_version, - user_agent, - codec: ProtocolCodec::UnsignedVarint(Some(IDENTIFY_PAYLOAD_SIZE)), - protocols: Vec::new(), - protocol: ProtocolName::from(PROTOCOL_NAME), - }, - Box::new(ReceiverStream::new(rx_event)), - ) - } + /// Create new [`Config`]. + /// + /// Returns a config that is given to `Litep2pConfig` and an event stream for + /// [`IdentifyEvent`]s. + pub fn new( + protocol_version: String, + user_agent: Option, + ) -> (Self, Box + Send + Unpin>) { + let (tx_event, rx_event) = channel(DEFAULT_CHANNEL_SIZE); + + ( + Self { + tx_event, + public: None, + protocol_version, + user_agent, + codec: ProtocolCodec::UnsignedVarint(Some(IDENTIFY_PAYLOAD_SIZE)), + protocols: Vec::new(), + protocol: ProtocolName::from(PROTOCOL_NAME), + }, + Box::new(ReceiverStream::new(rx_event)), + ) + } } /// Events emitted by Identify protocol. #[derive(Debug)] pub enum IdentifyEvent { - /// Peer identified. - PeerIdentified { - /// Peer ID. - peer: PeerId, + /// Peer identified. + PeerIdentified { + /// Peer ID. + peer: PeerId, - /// Protocol version. - protocol_version: Option, + /// Protocol version. + protocol_version: Option, - /// User agent. - user_agent: Option, + /// User agent. + user_agent: Option, - /// Supported protocols. - supported_protocols: HashSet, + /// Supported protocols. + supported_protocols: HashSet, - /// Observed address. - observed_address: Multiaddr, + /// Observed address. + observed_address: Multiaddr, - /// Listen addresses. - listen_addresses: Vec, - }, + /// Listen addresses. + listen_addresses: Vec, + }, } /// Identify response received from remote. struct IdentifyResponse { - /// Remote peer ID. - peer: PeerId, + /// Remote peer ID. + peer: PeerId, - /// Protocol version. - protocol_version: Option, + /// Protocol version. + protocol_version: Option, - /// User agent. - user_agent: Option, + /// User agent. + user_agent: Option, - /// Protocols supported by remote. - supported_protocols: HashSet, + /// Protocols supported by remote. + supported_protocols: HashSet, - /// Remote's listen addresses. - listen_addresses: Vec, + /// Remote's listen addresses. + listen_addresses: Vec, - /// Observed address. - observed_address: Option, + /// Observed address. + observed_address: Option, } pub(crate) struct Identify { - // Connection service. - service: TransportService, + // Connection service. + service: TransportService, - /// TX channel for sending events to the user protocol. - tx: Sender, + /// TX channel for sending events to the user protocol. + tx: Sender, - /// Connected peers and their observed addresses. - peers: HashMap, + /// Connected peers and their observed addresses. + peers: HashMap, - // Public key of the local node, filled by `Litep2p`. - public: PublicKey, + // Public key of the local node, filled by `Litep2p`. + public: PublicKey, - /// Local peer ID. - local_peer_id: PeerId, + /// Local peer ID. + local_peer_id: PeerId, - /// Protocol version. - protocol_version: String, + /// Protocol version. + protocol_version: String, - /// User agent. - user_agent: String, + /// User agent. + user_agent: String, - /// Protocols supported by the local node, filled by `Litep2p`. - protocols: Vec, + /// Protocols supported by the local node, filled by `Litep2p`. + protocols: Vec, - /// Pending outbound substreams. - pending_outbound: FuturesStream>>, + /// Pending outbound substreams. + pending_outbound: FuturesStream>>, - /// Pending inbound substreams. - pending_inbound: FuturesStream>, + /// Pending inbound substreams. + pending_inbound: FuturesStream>, } impl Identify { - /// Create new [`Identify`] protocol. - pub(crate) fn new(service: TransportService, config: Config) -> Self { - // The public key is always supplied by litep2p and is the one - // used to identify the local peer. This is a similar story to the - // supported protocols. - let public = config.public.expect("public key to always be supplied by litep2p; qed"); - let local_peer_id = public.to_peer_id(); - - Self { - service, - tx: config.tx_event, - peers: HashMap::new(), - public, - local_peer_id, - protocol_version: config.protocol_version, - user_agent: config.user_agent.unwrap_or(DEFAULT_AGENT.to_string()), - pending_inbound: FuturesStream::new(), - pending_outbound: FuturesStream::new(), - protocols: config.protocols.iter().map(|protocol| protocol.to_string()).collect(), - } - } - - /// Connection established to remote peer. - fn on_connection_established(&mut self, peer: PeerId, endpoint: Endpoint) -> crate::Result<()> { - tracing::trace!(target: LOG_TARGET, ?peer, ?endpoint, "connection established"); - - self.service.open_substream(peer)?; - self.peers.insert(peer, endpoint); - - Ok(()) - } - - /// Connection closed to remote peer. - fn on_connection_closed(&mut self, peer: PeerId) { - tracing::trace!(target: LOG_TARGET, ?peer, "connection closed"); - - self.peers.remove(&peer); - } - - /// Inbound substream opened. - fn on_inbound_substream( - &mut self, - peer: PeerId, - protocol: ProtocolName, - mut substream: Substream, - ) { - tracing::trace!( - target: LOG_TARGET, - ?peer, - ?protocol, - "inbound substream opened" - ); - - let observed_addr = match self.peers.get(&peer) { - Some(endpoint) => Some(endpoint.address().to_vec()), - None => { - tracing::warn!( - target: LOG_TARGET, - ?peer, - %protocol, - "inbound identify substream opened for peer who doesn't exist", - ); - None - } - }; - - let mut listen_addr: HashSet<_> = - self.service.listen_addresses().into_iter().map(|addr| addr.to_vec()).collect(); - listen_addr - .extend(self.service.public_addresses().inner.read().iter().map(|addr| addr.to_vec())); - - let identify = identify_schema::Identify { - protocol_version: Some(self.protocol_version.clone()), - agent_version: Some(self.user_agent.clone()), - public_key: Some(self.public.to_protobuf_encoding()), - listen_addrs: listen_addr.into_iter().collect(), - observed_addr, - protocols: self.protocols.clone(), - }; - - tracing::trace!( - target: LOG_TARGET, - ?peer, - ?identify, - "sending identify response", - ); - - let mut msg = Vec::with_capacity(identify.encoded_len()); - identify.encode(&mut msg).expect("`msg` to have enough capacity"); - - self.pending_inbound.push(Box::pin(async move { - match tokio::time::timeout(Duration::from_secs(10), substream.send_framed(msg.into())) - .await - { - Err(error) => { - tracing::debug!( - target: LOG_TARGET, - ?peer, - ?error, - "timed out while sending ipfs identify response", - ); - } - Ok(Err(error)) => { - tracing::debug!( - target: LOG_TARGET, - ?peer, - ?error, - "failed to send ipfs identify response", - ); - } - Ok(_) => { - substream.close().await; - } - } - })) - } - - /// Outbound substream opened. - fn on_outbound_substream( - &mut self, - peer: PeerId, - protocol: ProtocolName, - substream_id: SubstreamId, - mut substream: Substream, - ) { - tracing::trace!( - target: LOG_TARGET, - ?peer, - ?protocol, - ?substream_id, - "outbound substream opened" - ); - - let local_peer_id = self.local_peer_id; - - self.pending_outbound.push(Box::pin(async move { + /// Create new [`Identify`] protocol. + pub(crate) fn new(service: TransportService, config: Config) -> Self { + // The public key is always supplied by litep2p and is the one + // used to identify the local peer. This is a similar story to the + // supported protocols. + let public = config.public.expect("public key to always be supplied by litep2p; qed"); + let local_peer_id = public.to_peer_id(); + + Self { + service, + tx: config.tx_event, + peers: HashMap::new(), + public, + local_peer_id, + protocol_version: config.protocol_version, + user_agent: config.user_agent.unwrap_or(DEFAULT_AGENT.to_string()), + pending_inbound: FuturesStream::new(), + pending_outbound: FuturesStream::new(), + protocols: config.protocols.iter().map(|protocol| protocol.to_string()).collect(), + } + } + + /// Connection established to remote peer. + fn on_connection_established(&mut self, peer: PeerId, endpoint: Endpoint) -> crate::Result<()> { + tracing::trace!(target: LOG_TARGET, ?peer, ?endpoint, "connection established"); + + self.service.open_substream(peer)?; + self.peers.insert(peer, endpoint); + + Ok(()) + } + + /// Connection closed to remote peer. + fn on_connection_closed(&mut self, peer: PeerId) { + tracing::trace!(target: LOG_TARGET, ?peer, "connection closed"); + + self.peers.remove(&peer); + } + + /// Inbound substream opened. + fn on_inbound_substream( + &mut self, + peer: PeerId, + protocol: ProtocolName, + mut substream: Substream, + ) { + tracing::trace!( + target: LOG_TARGET, + ?peer, + ?protocol, + "inbound substream opened" + ); + + let observed_addr = match self.peers.get(&peer) { + Some(endpoint) => Some(endpoint.address().to_vec()), + None => { + tracing::warn!( + target: LOG_TARGET, + ?peer, + %protocol, + "inbound identify substream opened for peer who doesn't exist", + ); + None + }, + }; + + let mut listen_addr: HashSet<_> = + self.service.listen_addresses().into_iter().map(|addr| addr.to_vec()).collect(); + listen_addr + .extend(self.service.public_addresses().inner.read().iter().map(|addr| addr.to_vec())); + + let identify = identify_schema::Identify { + protocol_version: Some(self.protocol_version.clone()), + agent_version: Some(self.user_agent.clone()), + public_key: Some(self.public.to_protobuf_encoding()), + listen_addrs: listen_addr.into_iter().collect(), + observed_addr, + protocols: self.protocols.clone(), + }; + + tracing::trace!( + target: LOG_TARGET, + ?peer, + ?identify, + "sending identify response", + ); + + let mut msg = Vec::with_capacity(identify.encoded_len()); + identify.encode(&mut msg).expect("`msg` to have enough capacity"); + + self.pending_inbound.push(Box::pin(async move { + match tokio::time::timeout(Duration::from_secs(10), substream.send_framed(msg.into())) + .await + { + Err(error) => { + tracing::debug!( + target: LOG_TARGET, + ?peer, + ?error, + "timed out while sending ipfs identify response", + ); + }, + Ok(Err(error)) => { + tracing::debug!( + target: LOG_TARGET, + ?peer, + ?error, + "failed to send ipfs identify response", + ); + }, + Ok(_) => { + substream.close().await; + }, + } + })) + } + + /// Outbound substream opened. + fn on_outbound_substream( + &mut self, + peer: PeerId, + protocol: ProtocolName, + substream_id: SubstreamId, + mut substream: Substream, + ) { + tracing::trace!( + target: LOG_TARGET, + ?peer, + ?protocol, + ?substream_id, + "outbound substream opened" + ); + + let local_peer_id = self.local_peer_id; + + self.pending_outbound.push(Box::pin(async move { let payload = match tokio::time::timeout(Duration::from_secs(10), substream.next()).await { Err(_) => return Err(Error::Timeout), @@ -400,126 +400,122 @@ impl Identify { listen_addresses, }) })); - } - - /// Start [`Identify`] event loop. - pub async fn run(mut self) { - tracing::debug!(target: LOG_TARGET, "starting identify event loop"); - - loop { - tokio::select! { - event = self.service.next() => match event { - None => { - tracing::warn!(target: LOG_TARGET, "transport service stream ended, terminating identify event loop"); - return - }, - Some(TransportEvent::ConnectionEstablished { peer, endpoint }) => { - let _ = self.on_connection_established(peer, endpoint); - } - Some(TransportEvent::ConnectionClosed { peer }) => { - self.on_connection_closed(peer); - } - Some(TransportEvent::SubstreamOpened { - peer, - protocol, - direction, - substream, - .. - }) => match direction { - Direction::Inbound => self.on_inbound_substream(peer, protocol, substream), - Direction::Outbound(substream_id) => self.on_outbound_substream(peer, protocol, substream_id, substream), - }, - _ => {} - }, - _ = self.pending_inbound.next(), if !self.pending_inbound.is_empty() => {} - event = self.pending_outbound.next(), if !self.pending_outbound.is_empty() => match event { - Some(Ok(response)) => { - let _ = self.tx - .send(IdentifyEvent::PeerIdentified { - peer: response.peer, - protocol_version: response.protocol_version, - user_agent: response.user_agent, - supported_protocols: response.supported_protocols.into_iter().map(From::from).collect(), - observed_address: response.observed_address.map_or(Multiaddr::empty(), |address| address), - listen_addresses: response.listen_addresses, - }) - .await; - } - Some(Err(error)) => tracing::debug!(target: LOG_TARGET, ?error, "failed to read ipfs identify response"), - None => {} - } - } - } - } + } + + /// Start [`Identify`] event loop. + pub async fn run(mut self) { + tracing::debug!(target: LOG_TARGET, "starting identify event loop"); + + loop { + tokio::select! { + event = self.service.next() => match event { + None => { + tracing::warn!(target: LOG_TARGET, "transport service stream ended, terminating identify event loop"); + return + }, + Some(TransportEvent::ConnectionEstablished { peer, endpoint }) => { + let _ = self.on_connection_established(peer, endpoint); + } + Some(TransportEvent::ConnectionClosed { peer }) => { + self.on_connection_closed(peer); + } + Some(TransportEvent::SubstreamOpened { + peer, + protocol, + direction, + substream, + .. + }) => match direction { + Direction::Inbound => self.on_inbound_substream(peer, protocol, substream), + Direction::Outbound(substream_id) => self.on_outbound_substream(peer, protocol, substream_id, substream), + }, + _ => {} + }, + _ = self.pending_inbound.next(), if !self.pending_inbound.is_empty() => {} + event = self.pending_outbound.next(), if !self.pending_outbound.is_empty() => match event { + Some(Ok(response)) => { + let _ = self.tx + .send(IdentifyEvent::PeerIdentified { + peer: response.peer, + protocol_version: response.protocol_version, + user_agent: response.user_agent, + supported_protocols: response.supported_protocols.into_iter().map(From::from).collect(), + observed_address: response.observed_address.map_or(Multiaddr::empty(), |address| address), + listen_addresses: response.listen_addresses, + }) + .await; + } + Some(Err(error)) => tracing::debug!(target: LOG_TARGET, ?error, "failed to read ipfs identify response"), + None => {} + } + } + } + } } #[cfg(test)] mod tests { - use super::*; - use crate::{config::ConfigBuilder, transport::tcp::config::Config as TcpConfig, Litep2p}; - use multiaddr::{Multiaddr, Protocol}; - - fn create_litep2p() -> ( - Litep2p, - Box + Send + Unpin>, - PeerId, - ) { - let (identify_config, identify) = - Config::new("1.0.0".to_string(), Some("litep2p/1.0.0".to_string())); - - let keypair = crate::crypto::dilithium::Keypair::generate(); - let peer = PeerId::from_public_key(&crate::crypto::PublicKey::from(keypair.public())); - let config = ConfigBuilder::new() - .with_keypair(keypair) - .with_tcp(TcpConfig { - listen_addresses: vec!["/ip6/::1/tcp/0".parse().unwrap()], - ..Default::default() - }) - .with_libp2p_identify(identify_config) - .build(); - - (Litep2p::new(config).unwrap(), identify, peer) - } - - #[tokio::test] - async fn update_identify_addresses() { - // Create two instances of litep2p - let (mut litep2p1, mut event_stream1, peer1) = create_litep2p(); - let (mut litep2p2, mut event_stream2, _peer2) = create_litep2p(); - let litep2p1_address = litep2p1.listen_addresses().next().unwrap(); - - let multiaddr: Multiaddr = "/ip6/::9/tcp/111".parse().unwrap(); - // Litep2p1 is now reporting the new address. - assert!(litep2p1.public_addresses().add_address(multiaddr.clone()).unwrap()); - - // Dial `litep2p1` - litep2p2.dial_address(litep2p1_address.clone()).await.unwrap(); - - let expected_multiaddr = multiaddr.with(Protocol::P2p(peer1.into())); - - tokio::spawn(async move { - loop { - tokio::select! { - _ = litep2p1.next_event() => {} - _event = event_stream1.next() => {} - } - } - }); - - loop { - tokio::select! { - _ = litep2p2.next_event() => {} - event = event_stream2.next() => match event { - Some(IdentifyEvent::PeerIdentified { - listen_addresses, - .. - }) => { - assert!(listen_addresses.iter().any(|address| address == &expected_multiaddr)); - break; - } - _ => {} - } - } - } - } + use super::*; + use crate::{config::ConfigBuilder, transport::tcp::config::Config as TcpConfig, Litep2p}; + use multiaddr::{Multiaddr, Protocol}; + + fn create_litep2p() -> (Litep2p, Box + Send + Unpin>, PeerId) { + let (identify_config, identify) = + Config::new("1.0.0".to_string(), Some("litep2p/1.0.0".to_string())); + + let keypair = crate::crypto::dilithium::Keypair::generate(); + let peer = PeerId::from_public_key(&crate::crypto::PublicKey::from(keypair.public())); + let config = ConfigBuilder::new() + .with_keypair(keypair) + .with_tcp(TcpConfig { + listen_addresses: vec!["/ip6/::1/tcp/0".parse().unwrap()], + ..Default::default() + }) + .with_libp2p_identify(identify_config) + .build(); + + (Litep2p::new(config).unwrap(), identify, peer) + } + + #[tokio::test] + async fn update_identify_addresses() { + // Create two instances of litep2p + let (mut litep2p1, mut event_stream1, peer1) = create_litep2p(); + let (mut litep2p2, mut event_stream2, _peer2) = create_litep2p(); + let litep2p1_address = litep2p1.listen_addresses().next().unwrap(); + + let multiaddr: Multiaddr = "/ip6/::9/tcp/111".parse().unwrap(); + // Litep2p1 is now reporting the new address. + assert!(litep2p1.public_addresses().add_address(multiaddr.clone()).unwrap()); + + // Dial `litep2p1` + litep2p2.dial_address(litep2p1_address.clone()).await.unwrap(); + + let expected_multiaddr = multiaddr.with(Protocol::P2p(peer1.into())); + + tokio::spawn(async move { + loop { + tokio::select! { + _ = litep2p1.next_event() => {} + _event = event_stream1.next() => {} + } + } + }); + + loop { + tokio::select! { + _ = litep2p2.next_event() => {} + event = event_stream2.next() => match event { + Some(IdentifyEvent::PeerIdentified { + listen_addresses, + .. + }) => { + assert!(listen_addresses.iter().any(|address| address == &expected_multiaddr)); + break; + } + _ => {} + } + } + } + } } diff --git a/client/litep2p/src/protocol/libp2p/kademlia/bucket.rs b/client/litep2p/src/protocol/libp2p/kademlia/bucket.rs index 4c999efc..a5db9420 100644 --- a/client/litep2p/src/protocol/libp2p/kademlia/bucket.rs +++ b/client/litep2p/src/protocol/libp2p/kademlia/bucket.rs @@ -22,170 +22,164 @@ //! Kademlia k-bucket implementation. use crate::{ - protocol::libp2p::kademlia::types::{ConnectionType, KademliaPeer, Key}, - PeerId, + protocol::libp2p::kademlia::types::{ConnectionType, KademliaPeer, Key}, + PeerId, }; /// K-bucket entry. #[derive(Debug)] pub enum KBucketEntry<'a> { - /// Entry points to local node. - LocalNode, + /// Entry points to local node. + LocalNode, - /// Occupied entry to a connected node. - Occupied(&'a mut KademliaPeer), + /// Occupied entry to a connected node. + Occupied(&'a mut KademliaPeer), - /// Vacant entry. - Vacant(&'a mut KademliaPeer), + /// Vacant entry. + Vacant(&'a mut KademliaPeer), - /// Entry not found and any present entry cannot be replaced. - NoSlot, + /// Entry not found and any present entry cannot be replaced. + NoSlot, } impl<'a> KBucketEntry<'a> { - /// Insert new entry into the entry if possible. - pub fn insert(&'a mut self, new: KademliaPeer) { - if let KBucketEntry::Vacant(old) = self { - old.peer = new.peer; - old.key = Key::from(new.peer); - old.address_store = new.address_store; - old.connection = new.connection; - } - } + /// Insert new entry into the entry if possible. + pub fn insert(&'a mut self, new: KademliaPeer) { + if let KBucketEntry::Vacant(old) = self { + old.peer = new.peer; + old.key = Key::from(new.peer); + old.address_store = new.address_store; + old.connection = new.connection; + } + } } /// Kademlia k-bucket. pub struct KBucket { - // TODO: https://github.com/paritytech/litep2p/issues/335 - // store peers in a btreemap with increasing distance from local key? - nodes: Vec, + // TODO: https://github.com/paritytech/litep2p/issues/335 + // store peers in a btreemap with increasing distance from local key? + nodes: Vec, } impl KBucket { - /// Create new [`KBucket`]. - pub fn new() -> Self { - Self { - nodes: Vec::with_capacity(20), - } - } - - /// Get entry into the bucket. - // TODO: https://github.com/paritytech/litep2p/pull/184 should optimize this - pub fn entry(&mut self, key: Key) -> KBucketEntry<'_> { - for i in 0..self.nodes.len() { - if self.nodes[i].key == key { - return KBucketEntry::Occupied(&mut self.nodes[i]); - } - } - - if self.nodes.len() < 20 { - self.nodes.push(KademliaPeer::new( - PeerId::random(), - vec![], - ConnectionType::NotConnected, - )); - let len = self.nodes.len() - 1; - return KBucketEntry::Vacant(&mut self.nodes[len]); - } - - for i in 0..self.nodes.len() { - match self.nodes[i].connection { - ConnectionType::NotConnected | ConnectionType::CannotConnect => { - return KBucketEntry::Vacant(&mut self.nodes[i]); - } - _ => continue, - } - } - - KBucketEntry::NoSlot - } - - /// Get iterator over the k-bucket, sorting the k-bucket entries in increasing order - /// by distance. - pub fn closest_iter(&self, target: &Key) -> impl Iterator { - let mut nodes: Vec<_> = self.nodes.iter().collect(); - nodes.sort_by(|a, b| target.distance(&a.key).cmp(&target.distance(&b.key))); - nodes.into_iter().filter(|peer| !peer.address_store.is_empty()) - } + /// Create new [`KBucket`]. + pub fn new() -> Self { + Self { nodes: Vec::with_capacity(20) } + } + + /// Get entry into the bucket. + // TODO: https://github.com/paritytech/litep2p/pull/184 should optimize this + pub fn entry(&mut self, key: Key) -> KBucketEntry<'_> { + for i in 0..self.nodes.len() { + if self.nodes[i].key == key { + return KBucketEntry::Occupied(&mut self.nodes[i]); + } + } + + if self.nodes.len() < 20 { + self.nodes.push(KademliaPeer::new( + PeerId::random(), + vec![], + ConnectionType::NotConnected, + )); + let len = self.nodes.len() - 1; + return KBucketEntry::Vacant(&mut self.nodes[len]); + } + + for i in 0..self.nodes.len() { + match self.nodes[i].connection { + ConnectionType::NotConnected | ConnectionType::CannotConnect => { + return KBucketEntry::Vacant(&mut self.nodes[i]); + }, + _ => continue, + } + } + + KBucketEntry::NoSlot + } + + /// Get iterator over the k-bucket, sorting the k-bucket entries in increasing order + /// by distance. + pub fn closest_iter(&self, target: &Key) -> impl Iterator { + let mut nodes: Vec<_> = self.nodes.iter().collect(); + nodes.sort_by(|a, b| target.distance(&a.key).cmp(&target.distance(&b.key))); + nodes.into_iter().filter(|peer| !peer.address_store.is_empty()) + } } #[cfg(test)] mod tests { - use super::*; - - #[test] - fn closest_iter() { - let mut bucket = KBucket::new(); - - // add some random nodes to the bucket - let _ = (0..10) - .map(|_| { - let peer = PeerId::random(); - bucket.nodes.push(KademliaPeer::new(peer, vec![], ConnectionType::Connected)); - - peer - }) - .collect::>(); - - let target = Key::from(PeerId::random()); - let iter = bucket.closest_iter(&target); - let mut prev = None; - - for node in iter { - if let Some(distance) = prev { - assert!(distance < target.distance(&node.key)); - } - - prev = Some(target.distance(&node.key)); - } - } - - #[test] - fn ignore_peers_with_no_addresses() { - let mut bucket = KBucket::new(); - - // add peers with no addresses to the bucket - let _ = (0..10) - .map(|_| { - let peer = PeerId::random(); - bucket.nodes.push(KademliaPeer::new( - peer, - vec![], - ConnectionType::NotConnected, - )); - - peer - }) - .collect::>(); - - // add three peers with an address - let _ = (0..3) - .map(|_| { - let peer = PeerId::random(); - bucket.nodes.push(KademliaPeer::new( - peer, - vec!["/ip6/::/tcp/0".parse().unwrap()], - ConnectionType::Connected, - )); - - peer - }) - .collect::>(); - - let target = Key::from(PeerId::random()); - let iter = bucket.closest_iter(&target); - let mut prev = None; - let mut num_peers = 0usize; - - for node in iter { - if let Some(distance) = prev { - assert!(distance < target.distance(&node.key)); - } - - num_peers += 1; - prev = Some(target.distance(&node.key)); - } - - assert_eq!(num_peers, 3usize); - } + use super::*; + + #[test] + fn closest_iter() { + let mut bucket = KBucket::new(); + + // add some random nodes to the bucket + let _ = (0..10) + .map(|_| { + let peer = PeerId::random(); + bucket.nodes.push(KademliaPeer::new(peer, vec![], ConnectionType::Connected)); + + peer + }) + .collect::>(); + + let target = Key::from(PeerId::random()); + let iter = bucket.closest_iter(&target); + let mut prev = None; + + for node in iter { + if let Some(distance) = prev { + assert!(distance < target.distance(&node.key)); + } + + prev = Some(target.distance(&node.key)); + } + } + + #[test] + fn ignore_peers_with_no_addresses() { + let mut bucket = KBucket::new(); + + // add peers with no addresses to the bucket + let _ = (0..10) + .map(|_| { + let peer = PeerId::random(); + bucket.nodes.push(KademliaPeer::new(peer, vec![], ConnectionType::NotConnected)); + + peer + }) + .collect::>(); + + // add three peers with an address + let _ = (0..3) + .map(|_| { + let peer = PeerId::random(); + bucket.nodes.push(KademliaPeer::new( + peer, + vec!["/ip6/::/tcp/0".parse().unwrap()], + ConnectionType::Connected, + )); + + peer + }) + .collect::>(); + + let target = Key::from(PeerId::random()); + let iter = bucket.closest_iter(&target); + let mut prev = None; + let mut num_peers = 0usize; + + for node in iter { + if let Some(distance) = prev { + assert!(distance < target.distance(&node.key)); + } + + num_peers += 1; + prev = Some(target.distance(&node.key)); + } + + assert_eq!(num_peers, 3usize); + } } diff --git a/client/litep2p/src/protocol/libp2p/kademlia/config.rs b/client/litep2p/src/protocol/libp2p/kademlia/config.rs index 79758c67..97d6480c 100644 --- a/client/litep2p/src/protocol/libp2p/kademlia/config.rs +++ b/client/litep2p/src/protocol/libp2p/kademlia/config.rs @@ -19,25 +19,25 @@ // DEALINGS IN THE SOFTWARE. use crate::{ - codec::ProtocolCodec, - protocol::libp2p::kademlia::{ - handle::{ - IncomingRecordValidationMode, KademliaCommand, KademliaEvent, KademliaHandle, - RoutingTableUpdateMode, - }, - store::MemoryStoreConfig, - }, - types::protocol::ProtocolName, - PeerId, DEFAULT_CHANNEL_SIZE, + codec::ProtocolCodec, + protocol::libp2p::kademlia::{ + handle::{ + IncomingRecordValidationMode, KademliaCommand, KademliaEvent, KademliaHandle, + RoutingTableUpdateMode, + }, + store::MemoryStoreConfig, + }, + types::protocol::ProtocolName, + PeerId, DEFAULT_CHANNEL_SIZE, }; use multiaddr::Multiaddr; use tokio::sync::mpsc::{channel, Receiver, Sender}; use std::{ - collections::HashMap, - sync::{atomic::AtomicUsize, Arc}, - time::Duration, + collections::HashMap, + sync::{atomic::AtomicUsize, Arc}, + time::Duration, }; /// Default TTL for the records. @@ -76,269 +76,269 @@ const DEFAULT_MAX_MESSAGE_SIZE: usize = 70 * 1024; /// Kademlia configuration. #[derive(Debug)] pub struct Config { - // Protocol name. - // pub(crate) protocol: ProtocolName, - /// Protocol names. - pub(crate) protocol_names: Vec, + // Protocol name. + // pub(crate) protocol: ProtocolName, + /// Protocol names. + pub(crate) protocol_names: Vec, - /// Protocol codec. - pub(crate) codec: ProtocolCodec, + /// Protocol codec. + pub(crate) codec: ProtocolCodec, - /// Replication factor. - pub(super) replication_factor: usize, + /// Replication factor. + pub(super) replication_factor: usize, - /// Known peers. - pub(super) known_peers: HashMap>, + /// Known peers. + pub(super) known_peers: HashMap>, - /// Routing table update mode. - pub(super) update_mode: RoutingTableUpdateMode, + /// Routing table update mode. + pub(super) update_mode: RoutingTableUpdateMode, - /// Incoming records validation mode. - pub(super) validation_mode: IncomingRecordValidationMode, + /// Incoming records validation mode. + pub(super) validation_mode: IncomingRecordValidationMode, - /// Default record TTL. - pub(super) record_ttl: Duration, + /// Default record TTL. + pub(super) record_ttl: Duration, - /// Provider record TTL. - pub(super) memory_store_config: MemoryStoreConfig, + /// Provider record TTL. + pub(super) memory_store_config: MemoryStoreConfig, - /// TX channel for sending events to `KademliaHandle`. - pub(super) event_tx: Sender, + /// TX channel for sending events to `KademliaHandle`. + pub(super) event_tx: Sender, - /// RX channel for receiving commands from `KademliaHandle`. - pub(super) cmd_rx: Receiver, + /// RX channel for receiving commands from `KademliaHandle`. + pub(super) cmd_rx: Receiver, - /// Next query ID counter shared with the handle. - pub(super) next_query_id: Arc, + /// Next query ID counter shared with the handle. + pub(super) next_query_id: Arc, } impl Config { - fn new( - replication_factor: usize, - known_peers: HashMap>, - mut protocol_names: Vec, - update_mode: RoutingTableUpdateMode, - validation_mode: IncomingRecordValidationMode, - record_ttl: Duration, - memory_store_config: MemoryStoreConfig, - max_message_size: usize, - ) -> (Self, KademliaHandle) { - let (cmd_tx, cmd_rx) = channel(DEFAULT_CHANNEL_SIZE); - let (event_tx, event_rx) = channel(DEFAULT_CHANNEL_SIZE); - let next_query_id = Arc::new(AtomicUsize::new(0usize)); - - // if no protocol names were provided, use the default protocol - if protocol_names.is_empty() { - protocol_names.push(ProtocolName::from(PROTOCOL_NAME)); - } - - ( - Config { - protocol_names, - update_mode, - validation_mode, - record_ttl, - memory_store_config, - codec: ProtocolCodec::UnsignedVarint(Some(max_message_size)), - replication_factor, - known_peers, - cmd_rx, - event_tx, - next_query_id: next_query_id.clone(), - }, - KademliaHandle::new(cmd_tx, event_rx, next_query_id), - ) - } - - /// Build default Kademlia configuration. - pub fn default() -> (Self, KademliaHandle) { - Self::new( - REPLICATION_FACTOR, - HashMap::new(), - Vec::new(), - RoutingTableUpdateMode::Automatic, - IncomingRecordValidationMode::Automatic, - DEFAULT_TTL, - Default::default(), - DEFAULT_MAX_MESSAGE_SIZE, - ) - } + fn new( + replication_factor: usize, + known_peers: HashMap>, + mut protocol_names: Vec, + update_mode: RoutingTableUpdateMode, + validation_mode: IncomingRecordValidationMode, + record_ttl: Duration, + memory_store_config: MemoryStoreConfig, + max_message_size: usize, + ) -> (Self, KademliaHandle) { + let (cmd_tx, cmd_rx) = channel(DEFAULT_CHANNEL_SIZE); + let (event_tx, event_rx) = channel(DEFAULT_CHANNEL_SIZE); + let next_query_id = Arc::new(AtomicUsize::new(0usize)); + + // if no protocol names were provided, use the default protocol + if protocol_names.is_empty() { + protocol_names.push(ProtocolName::from(PROTOCOL_NAME)); + } + + ( + Config { + protocol_names, + update_mode, + validation_mode, + record_ttl, + memory_store_config, + codec: ProtocolCodec::UnsignedVarint(Some(max_message_size)), + replication_factor, + known_peers, + cmd_rx, + event_tx, + next_query_id: next_query_id.clone(), + }, + KademliaHandle::new(cmd_tx, event_rx, next_query_id), + ) + } + + /// Build default Kademlia configuration. + pub fn default() -> (Self, KademliaHandle) { + Self::new( + REPLICATION_FACTOR, + HashMap::new(), + Vec::new(), + RoutingTableUpdateMode::Automatic, + IncomingRecordValidationMode::Automatic, + DEFAULT_TTL, + Default::default(), + DEFAULT_MAX_MESSAGE_SIZE, + ) + } } /// Configuration builder for Kademlia. #[derive(Debug)] pub struct ConfigBuilder { - /// Replication factor. - pub(super) replication_factor: usize, + /// Replication factor. + pub(super) replication_factor: usize, - /// Routing table update mode. - pub(super) update_mode: RoutingTableUpdateMode, + /// Routing table update mode. + pub(super) update_mode: RoutingTableUpdateMode, - /// Incoming records validation mode. - pub(super) validation_mode: IncomingRecordValidationMode, + /// Incoming records validation mode. + pub(super) validation_mode: IncomingRecordValidationMode, - /// Known peers. - pub(super) known_peers: HashMap>, + /// Known peers. + pub(super) known_peers: HashMap>, - /// Protocol names. - pub(super) protocol_names: Vec, + /// Protocol names. + pub(super) protocol_names: Vec, - /// Default TTL for the records. - pub(super) record_ttl: Duration, + /// Default TTL for the records. + pub(super) record_ttl: Duration, - /// Memory store configuration. - pub(super) memory_store_config: MemoryStoreConfig, + /// Memory store configuration. + pub(super) memory_store_config: MemoryStoreConfig, - /// Maximum message size. - pub(crate) max_message_size: usize, + /// Maximum message size. + pub(crate) max_message_size: usize, } impl Default for ConfigBuilder { - fn default() -> Self { - Self::new() - } + fn default() -> Self { + Self::new() + } } impl ConfigBuilder { - /// Create new [`ConfigBuilder`]. - pub fn new() -> Self { - Self { - replication_factor: REPLICATION_FACTOR, - known_peers: HashMap::new(), - protocol_names: Vec::new(), - update_mode: RoutingTableUpdateMode::Automatic, - validation_mode: IncomingRecordValidationMode::Automatic, - record_ttl: DEFAULT_TTL, - memory_store_config: Default::default(), - max_message_size: DEFAULT_MAX_MESSAGE_SIZE, - } - } - - /// Set replication factor. - pub fn with_replication_factor(mut self, replication_factor: usize) -> Self { - self.replication_factor = replication_factor; - self - } - - /// Seed Kademlia with one or more known peers. - pub fn with_known_peers(mut self, peers: HashMap>) -> Self { - self.known_peers = peers; - self - } - - /// Set routing table update mode. - pub fn with_routing_table_update_mode(mut self, mode: RoutingTableUpdateMode) -> Self { - self.update_mode = mode; - self - } - - /// Set incoming records validation mode. - pub fn with_incoming_records_validation_mode( - mut self, - mode: IncomingRecordValidationMode, - ) -> Self { - self.validation_mode = mode; - self - } - - /// Set Kademlia protocol names, overriding the default protocol name. - /// - /// The order of the protocol names signifies preference so if, for example, there are two - /// protocols: - /// * `/kad/2.0.0` - /// * `/kad/1.0.0` - /// - /// Where `/kad/2.0.0` is the preferred version, then that should be in `protocol_names` before - /// `/kad/1.0.0`. - pub fn with_protocol_names(mut self, protocol_names: Vec) -> Self { - self.protocol_names = protocol_names; - self - } - - /// Set default TTL for the records. - /// - /// If unspecified, the default TTL is 36 hours. - pub fn with_record_ttl(mut self, record_ttl: Duration) -> Self { - self.record_ttl = record_ttl; - self - } - - /// Set maximum number of records in the memory store. - /// - /// If unspecified, the default maximum number of records is 1024. - pub fn with_max_records(mut self, max_records: usize) -> Self { - self.memory_store_config.max_records = max_records; - self - } - - /// Set maximum record size in bytes. - /// - /// If unspecified, the default maximum record size is 65 KiB. - pub fn with_max_record_size(mut self, max_record_size_bytes: usize) -> Self { - self.memory_store_config.max_record_size_bytes = max_record_size_bytes; - self - } - - /// Set maximum number of provider keys in the memory store. - /// - /// If unspecified, the default maximum number of provider keys is 1024. - pub fn with_max_provider_keys(mut self, max_provider_keys: usize) -> Self { - self.memory_store_config.max_provider_keys = max_provider_keys; - self - } - - /// Set maximum number of provider addresses per provider in the memory store. - /// - /// If unspecified, the default maximum number of provider addresses is 30. - pub fn with_max_provider_addresses(mut self, max_provider_addresses: usize) -> Self { - self.memory_store_config.max_provider_addresses = max_provider_addresses; - self - } - - /// Set maximum number of providers per key in the memory store. - /// - /// If unspecified, the default maximum number of providers per key is 20. - pub fn with_max_providers_per_key(mut self, max_providers_per_key: usize) -> Self { - self.memory_store_config.max_providers_per_key = max_providers_per_key; - self - } - - /// Set TTL for the provider records. Recommended value is 2 * (refresh interval) + 10%. - /// - /// If unspecified, the default TTL is 48 hours. - pub fn with_provider_record_ttl(mut self, provider_record_ttl: Duration) -> Self { - self.memory_store_config.provider_ttl = provider_record_ttl; - self - } - - /// Set the refresh (republish) interval for provider records. - /// - /// If unspecified, the default interval is 22 hours. - pub fn with_provider_refresh_interval(mut self, provider_refresh_interval: Duration) -> Self { - self.memory_store_config.provider_refresh_interval = provider_refresh_interval; - self - } - - /// Set the maximum Kademlia message size. - /// - /// Should fit `MemoryStore` max record size. If unspecified, the default maximum message size - /// is 70 KiB. - pub fn with_max_message_size(mut self, max_message_size: usize) -> Self { - self.max_message_size = max_message_size; - self - } - - /// Build Kademlia [`Config`]. - pub fn build(self) -> (Config, KademliaHandle) { - Config::new( - self.replication_factor, - self.known_peers, - self.protocol_names, - self.update_mode, - self.validation_mode, - self.record_ttl, - self.memory_store_config, - self.max_message_size, - ) - } + /// Create new [`ConfigBuilder`]. + pub fn new() -> Self { + Self { + replication_factor: REPLICATION_FACTOR, + known_peers: HashMap::new(), + protocol_names: Vec::new(), + update_mode: RoutingTableUpdateMode::Automatic, + validation_mode: IncomingRecordValidationMode::Automatic, + record_ttl: DEFAULT_TTL, + memory_store_config: Default::default(), + max_message_size: DEFAULT_MAX_MESSAGE_SIZE, + } + } + + /// Set replication factor. + pub fn with_replication_factor(mut self, replication_factor: usize) -> Self { + self.replication_factor = replication_factor; + self + } + + /// Seed Kademlia with one or more known peers. + pub fn with_known_peers(mut self, peers: HashMap>) -> Self { + self.known_peers = peers; + self + } + + /// Set routing table update mode. + pub fn with_routing_table_update_mode(mut self, mode: RoutingTableUpdateMode) -> Self { + self.update_mode = mode; + self + } + + /// Set incoming records validation mode. + pub fn with_incoming_records_validation_mode( + mut self, + mode: IncomingRecordValidationMode, + ) -> Self { + self.validation_mode = mode; + self + } + + /// Set Kademlia protocol names, overriding the default protocol name. + /// + /// The order of the protocol names signifies preference so if, for example, there are two + /// protocols: + /// * `/kad/2.0.0` + /// * `/kad/1.0.0` + /// + /// Where `/kad/2.0.0` is the preferred version, then that should be in `protocol_names` before + /// `/kad/1.0.0`. + pub fn with_protocol_names(mut self, protocol_names: Vec) -> Self { + self.protocol_names = protocol_names; + self + } + + /// Set default TTL for the records. + /// + /// If unspecified, the default TTL is 36 hours. + pub fn with_record_ttl(mut self, record_ttl: Duration) -> Self { + self.record_ttl = record_ttl; + self + } + + /// Set maximum number of records in the memory store. + /// + /// If unspecified, the default maximum number of records is 1024. + pub fn with_max_records(mut self, max_records: usize) -> Self { + self.memory_store_config.max_records = max_records; + self + } + + /// Set maximum record size in bytes. + /// + /// If unspecified, the default maximum record size is 65 KiB. + pub fn with_max_record_size(mut self, max_record_size_bytes: usize) -> Self { + self.memory_store_config.max_record_size_bytes = max_record_size_bytes; + self + } + + /// Set maximum number of provider keys in the memory store. + /// + /// If unspecified, the default maximum number of provider keys is 1024. + pub fn with_max_provider_keys(mut self, max_provider_keys: usize) -> Self { + self.memory_store_config.max_provider_keys = max_provider_keys; + self + } + + /// Set maximum number of provider addresses per provider in the memory store. + /// + /// If unspecified, the default maximum number of provider addresses is 30. + pub fn with_max_provider_addresses(mut self, max_provider_addresses: usize) -> Self { + self.memory_store_config.max_provider_addresses = max_provider_addresses; + self + } + + /// Set maximum number of providers per key in the memory store. + /// + /// If unspecified, the default maximum number of providers per key is 20. + pub fn with_max_providers_per_key(mut self, max_providers_per_key: usize) -> Self { + self.memory_store_config.max_providers_per_key = max_providers_per_key; + self + } + + /// Set TTL for the provider records. Recommended value is 2 * (refresh interval) + 10%. + /// + /// If unspecified, the default TTL is 48 hours. + pub fn with_provider_record_ttl(mut self, provider_record_ttl: Duration) -> Self { + self.memory_store_config.provider_ttl = provider_record_ttl; + self + } + + /// Set the refresh (republish) interval for provider records. + /// + /// If unspecified, the default interval is 22 hours. + pub fn with_provider_refresh_interval(mut self, provider_refresh_interval: Duration) -> Self { + self.memory_store_config.provider_refresh_interval = provider_refresh_interval; + self + } + + /// Set the maximum Kademlia message size. + /// + /// Should fit `MemoryStore` max record size. If unspecified, the default maximum message size + /// is 70 KiB. + pub fn with_max_message_size(mut self, max_message_size: usize) -> Self { + self.max_message_size = max_message_size; + self + } + + /// Build Kademlia [`Config`]. + pub fn build(self) -> (Config, KademliaHandle) { + Config::new( + self.replication_factor, + self.known_peers, + self.protocol_names, + self.update_mode, + self.validation_mode, + self.record_ttl, + self.memory_store_config, + self.max_message_size, + ) + } } diff --git a/client/litep2p/src/protocol/libp2p/kademlia/executor.rs b/client/litep2p/src/protocol/libp2p/kademlia/executor.rs index 65b9f68c..c4eb21b7 100644 --- a/client/litep2p/src/protocol/libp2p/kademlia/executor.rs +++ b/client/litep2p/src/protocol/libp2p/kademlia/executor.rs @@ -19,17 +19,17 @@ // DEALINGS IN THE SOFTWARE. use crate::{ - protocol::libp2p::kademlia::query::QueryId, substream::Substream, - utils::futures_stream::FuturesStream, PeerId, + protocol::libp2p::kademlia::query::QueryId, substream::Substream, + utils::futures_stream::FuturesStream, PeerId, }; use bytes::{Bytes, BytesMut}; use futures::{future::BoxFuture, Stream, StreamExt}; use std::{ - pin::Pin, - task::{Context, Poll}, - time::Duration, + pin::Pin, + task::{Context, Poll}, + time::Duration, }; /// Read timeout for inbound messages. @@ -40,519 +40,444 @@ const WRITE_TIMEOUT: Duration = Duration::from_secs(15); /// Faulure reason. #[derive(Debug)] pub enum FailureReason { - /// Substream was closed while reading/writing message to remote peer. - SubstreamClosed, + /// Substream was closed while reading/writing message to remote peer. + SubstreamClosed, - /// Timeout while reading/writing to substream. - Timeout, + /// Timeout while reading/writing to substream. + Timeout, } /// Query result. #[derive(Debug)] pub enum QueryResult { - /// Message was sent to remote peer successfully. - /// This result is only reported for send-only queries. Queries that include reading a - /// response won't report it and will only yield a [`QueryResult::ReadSuccess`]. - SendSuccess { - /// Substream. - substream: Substream, - }, - - /// Failed to send message to remote peer. - SendFailure { - /// Failure reason. - reason: FailureReason, - }, - - /// Message was read from the remote peer successfully. - ReadSuccess { - /// Substream. - substream: Substream, - - /// Read message. - message: BytesMut, - }, - - /// Failed to read message from remote peer. - ReadFailure { - /// Failure reason. - reason: FailureReason, - }, - - /// Result that must be treated as send success. This is needed as a workaround to support - /// older litep2p nodes not sending `PUT_VALUE` ACK messages and not reading them. - // TODO: remove this as part of https://github.com/paritytech/litep2p/issues/429. - AssumeSendSuccess, + /// Message was sent to remote peer successfully. + /// This result is only reported for send-only queries. Queries that include reading a + /// response won't report it and will only yield a [`QueryResult::ReadSuccess`]. + SendSuccess { + /// Substream. + substream: Substream, + }, + + /// Failed to send message to remote peer. + SendFailure { + /// Failure reason. + reason: FailureReason, + }, + + /// Message was read from the remote peer successfully. + ReadSuccess { + /// Substream. + substream: Substream, + + /// Read message. + message: BytesMut, + }, + + /// Failed to read message from remote peer. + ReadFailure { + /// Failure reason. + reason: FailureReason, + }, + + /// Result that must be treated as send success. This is needed as a workaround to support + /// older litep2p nodes not sending `PUT_VALUE` ACK messages and not reading them. + // TODO: remove this as part of https://github.com/paritytech/litep2p/issues/429. + AssumeSendSuccess, } /// Query result. #[derive(Debug)] pub struct QueryContext { - /// Peer ID. - pub peer: PeerId, + /// Peer ID. + pub peer: PeerId, - /// Query ID. - pub query_id: Option, + /// Query ID. + pub query_id: Option, - /// Query result. - pub result: QueryResult, + /// Query result. + pub result: QueryResult, } /// Query executor. pub struct QueryExecutor { - /// Pending futures. - futures: FuturesStream>, + /// Pending futures. + futures: FuturesStream>, } impl QueryExecutor { - /// Create new [`QueryExecutor`] - pub fn new() -> Self { - Self { - futures: FuturesStream::new(), - } - } - - /// Send message to remote peer. - pub fn send_message( - &mut self, - peer: PeerId, - query_id: Option, - message: Bytes, - mut substream: Substream, - ) { - self.futures.push(Box::pin(async move { - match tokio::time::timeout(WRITE_TIMEOUT, substream.send_framed(message)).await { - // Timeout error. - Err(_) => QueryContext { - peer, - query_id, - result: QueryResult::SendFailure { - reason: FailureReason::Timeout, - }, - }, - // Writing message to substream failed. - Ok(Err(_)) => QueryContext { - peer, - query_id, - result: QueryResult::SendFailure { - reason: FailureReason::SubstreamClosed, - }, - }, - Ok(Ok(())) => QueryContext { - peer, - query_id, - result: QueryResult::SendSuccess { substream }, - }, - } - })); - } - - /// Send message and ignore sending errors. - /// - /// This is a hackish way of dealing with older litep2p nodes not expecting receiving - /// `PUT_VALUE` ACK messages. This should eventually be removed. - // TODO: remove this as part of https://github.com/paritytech/litep2p/issues/429. - pub fn send_message_eat_failure( - &mut self, - peer: PeerId, - query_id: Option, - message: Bytes, - mut substream: Substream, - ) { - self.futures.push(Box::pin(async move { - match tokio::time::timeout(WRITE_TIMEOUT, substream.send_framed(message)).await { - // Timeout error. - Err(_) => QueryContext { - peer, - query_id, - result: QueryResult::AssumeSendSuccess, - }, - // Writing message to substream failed. - Ok(Err(_)) => QueryContext { - peer, - query_id, - result: QueryResult::AssumeSendSuccess, - }, - Ok(Ok(())) => QueryContext { - peer, - query_id, - result: QueryResult::SendSuccess { substream }, - }, - } - })); - } - - /// Read message from remote peer with timeout. - pub fn read_message( - &mut self, - peer: PeerId, - query_id: Option, - mut substream: Substream, - ) { - self.futures.push(Box::pin(async move { - match tokio::time::timeout(READ_TIMEOUT, substream.next()).await { - Err(_) => QueryContext { - peer, - query_id, - result: QueryResult::ReadFailure { - reason: FailureReason::Timeout, - }, - }, - Ok(Some(Ok(message))) => QueryContext { - peer, - query_id, - result: QueryResult::ReadSuccess { substream, message }, - }, - Ok(None) | Ok(Some(Err(_))) => QueryContext { - peer, - query_id, - result: QueryResult::ReadFailure { - reason: FailureReason::SubstreamClosed, - }, - }, - } - })); - } - - /// Send request to remote peer and read response. - pub fn send_request_read_response( - &mut self, - peer: PeerId, - query_id: Option, - message: Bytes, - mut substream: Substream, - ) { - self.futures.push(Box::pin(async move { - match tokio::time::timeout(WRITE_TIMEOUT, substream.send_framed(message)).await { - // Timeout error. - Err(_) => - return QueryContext { - peer, - query_id, - result: QueryResult::SendFailure { - reason: FailureReason::Timeout, - }, - }, - // Writing message to substream failed. - Ok(Err(_)) => { - let _ = substream.close().await; - return QueryContext { - peer, - query_id, - result: QueryResult::SendFailure { - reason: FailureReason::SubstreamClosed, - }, - }; - } - // This will result in either `SendAndReadSuccess` or `SendSuccessReadFailure`. - Ok(Ok(())) => (), - }; - - match tokio::time::timeout(READ_TIMEOUT, substream.next()).await { - Err(_) => QueryContext { - peer, - query_id, - result: QueryResult::ReadFailure { - reason: FailureReason::Timeout, - }, - }, - Ok(Some(Ok(message))) => QueryContext { - peer, - query_id, - result: QueryResult::ReadSuccess { substream, message }, - }, - Ok(None) | Ok(Some(Err(_))) => QueryContext { - peer, - query_id, - result: QueryResult::ReadFailure { - reason: FailureReason::SubstreamClosed, - }, - }, - } - })); - } - - /// Send request to remote peer and read the response, ignoring it and any read errors. - /// - /// This is a hackish way of dealing with older litep2p nodes not sending `PUT_VALUE` ACK - /// messages. This should eventually be removed. - // TODO: remove this as part of https://github.com/paritytech/litep2p/issues/429. - pub fn send_request_eat_response_failure( - &mut self, - peer: PeerId, - query_id: Option, - message: Bytes, - mut substream: Substream, - ) { - self.futures.push(Box::pin(async move { - match tokio::time::timeout(WRITE_TIMEOUT, substream.send_framed(message)).await { - // Timeout error. - Err(_) => - return QueryContext { - peer, - query_id, - result: QueryResult::SendFailure { - reason: FailureReason::Timeout, - }, - }, - // Writing message to substream failed. - Ok(Err(_)) => { - let _ = substream.close().await; - return QueryContext { - peer, - query_id, - result: QueryResult::SendFailure { - reason: FailureReason::SubstreamClosed, - }, - }; - } - // This will result in either `SendAndReadSuccess` or `SendSuccessReadFailure`. - Ok(Ok(())) => (), - }; - - // Ignore the read result (including errors). - if let Ok(Some(Ok(message))) = - tokio::time::timeout(READ_TIMEOUT, substream.next()).await - { - QueryContext { - peer, - query_id, - result: QueryResult::ReadSuccess { substream, message }, - } - } else { - QueryContext { - peer, - query_id, - result: QueryResult::AssumeSendSuccess, - } - } - })); - } + /// Create new [`QueryExecutor`] + pub fn new() -> Self { + Self { futures: FuturesStream::new() } + } + + /// Send message to remote peer. + pub fn send_message( + &mut self, + peer: PeerId, + query_id: Option, + message: Bytes, + mut substream: Substream, + ) { + self.futures.push(Box::pin(async move { + match tokio::time::timeout(WRITE_TIMEOUT, substream.send_framed(message)).await { + // Timeout error. + Err(_) => QueryContext { + peer, + query_id, + result: QueryResult::SendFailure { reason: FailureReason::Timeout }, + }, + // Writing message to substream failed. + Ok(Err(_)) => QueryContext { + peer, + query_id, + result: QueryResult::SendFailure { reason: FailureReason::SubstreamClosed }, + }, + Ok(Ok(())) => + QueryContext { peer, query_id, result: QueryResult::SendSuccess { substream } }, + } + })); + } + + /// Send message and ignore sending errors. + /// + /// This is a hackish way of dealing with older litep2p nodes not expecting receiving + /// `PUT_VALUE` ACK messages. This should eventually be removed. + // TODO: remove this as part of https://github.com/paritytech/litep2p/issues/429. + pub fn send_message_eat_failure( + &mut self, + peer: PeerId, + query_id: Option, + message: Bytes, + mut substream: Substream, + ) { + self.futures.push(Box::pin(async move { + match tokio::time::timeout(WRITE_TIMEOUT, substream.send_framed(message)).await { + // Timeout error. + Err(_) => QueryContext { peer, query_id, result: QueryResult::AssumeSendSuccess }, + // Writing message to substream failed. + Ok(Err(_)) => + QueryContext { peer, query_id, result: QueryResult::AssumeSendSuccess }, + Ok(Ok(())) => + QueryContext { peer, query_id, result: QueryResult::SendSuccess { substream } }, + } + })); + } + + /// Read message from remote peer with timeout. + pub fn read_message( + &mut self, + peer: PeerId, + query_id: Option, + mut substream: Substream, + ) { + self.futures.push(Box::pin(async move { + match tokio::time::timeout(READ_TIMEOUT, substream.next()).await { + Err(_) => QueryContext { + peer, + query_id, + result: QueryResult::ReadFailure { reason: FailureReason::Timeout }, + }, + Ok(Some(Ok(message))) => QueryContext { + peer, + query_id, + result: QueryResult::ReadSuccess { substream, message }, + }, + Ok(None) | Ok(Some(Err(_))) => QueryContext { + peer, + query_id, + result: QueryResult::ReadFailure { reason: FailureReason::SubstreamClosed }, + }, + } + })); + } + + /// Send request to remote peer and read response. + pub fn send_request_read_response( + &mut self, + peer: PeerId, + query_id: Option, + message: Bytes, + mut substream: Substream, + ) { + self.futures.push(Box::pin(async move { + match tokio::time::timeout(WRITE_TIMEOUT, substream.send_framed(message)).await { + // Timeout error. + Err(_) => + return QueryContext { + peer, + query_id, + result: QueryResult::SendFailure { reason: FailureReason::Timeout }, + }, + // Writing message to substream failed. + Ok(Err(_)) => { + let _ = substream.close().await; + return QueryContext { + peer, + query_id, + result: QueryResult::SendFailure { reason: FailureReason::SubstreamClosed }, + }; + }, + // This will result in either `SendAndReadSuccess` or `SendSuccessReadFailure`. + Ok(Ok(())) => (), + }; + + match tokio::time::timeout(READ_TIMEOUT, substream.next()).await { + Err(_) => QueryContext { + peer, + query_id, + result: QueryResult::ReadFailure { reason: FailureReason::Timeout }, + }, + Ok(Some(Ok(message))) => QueryContext { + peer, + query_id, + result: QueryResult::ReadSuccess { substream, message }, + }, + Ok(None) | Ok(Some(Err(_))) => QueryContext { + peer, + query_id, + result: QueryResult::ReadFailure { reason: FailureReason::SubstreamClosed }, + }, + } + })); + } + + /// Send request to remote peer and read the response, ignoring it and any read errors. + /// + /// This is a hackish way of dealing with older litep2p nodes not sending `PUT_VALUE` ACK + /// messages. This should eventually be removed. + // TODO: remove this as part of https://github.com/paritytech/litep2p/issues/429. + pub fn send_request_eat_response_failure( + &mut self, + peer: PeerId, + query_id: Option, + message: Bytes, + mut substream: Substream, + ) { + self.futures.push(Box::pin(async move { + match tokio::time::timeout(WRITE_TIMEOUT, substream.send_framed(message)).await { + // Timeout error. + Err(_) => + return QueryContext { + peer, + query_id, + result: QueryResult::SendFailure { reason: FailureReason::Timeout }, + }, + // Writing message to substream failed. + Ok(Err(_)) => { + let _ = substream.close().await; + return QueryContext { + peer, + query_id, + result: QueryResult::SendFailure { reason: FailureReason::SubstreamClosed }, + }; + }, + // This will result in either `SendAndReadSuccess` or `SendSuccessReadFailure`. + Ok(Ok(())) => (), + }; + + // Ignore the read result (including errors). + if let Ok(Some(Ok(message))) = + tokio::time::timeout(READ_TIMEOUT, substream.next()).await + { + QueryContext { + peer, + query_id, + result: QueryResult::ReadSuccess { substream, message }, + } + } else { + QueryContext { peer, query_id, result: QueryResult::AssumeSendSuccess } + } + })); + } } impl Stream for QueryExecutor { - type Item = QueryContext; + type Item = QueryContext; - fn poll_next(mut self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll> { - self.futures.poll_next_unpin(cx) - } + fn poll_next(mut self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll> { + self.futures.poll_next_unpin(cx) + } } #[cfg(test)] mod tests { - use super::*; - use crate::{mock::substream::MockSubstream, types::SubstreamId}; - - #[tokio::test] - async fn substream_read_timeout() { - let mut executor = QueryExecutor::new(); - let peer = PeerId::random(); - let mut substream = MockSubstream::new(); - substream.expect_poll_next().returning(|_| Poll::Pending); - let substream = Substream::new_mock(peer, SubstreamId::from(0usize), Box::new(substream)); - - executor.read_message(peer, None, substream); - - match tokio::time::timeout(Duration::from_secs(20), executor.next()).await { - Ok(Some(QueryContext { - peer: queried_peer, - query_id, - result, - })) => { - assert_eq!(peer, queried_peer); - assert!(query_id.is_none()); - assert!(std::matches!( - result, - QueryResult::ReadFailure { - reason: FailureReason::Timeout - } - )); - } - result => panic!("invalid result received: {result:?}"), - } - } - - #[tokio::test] - async fn substream_read_substream_closed() { - let mut executor = QueryExecutor::new(); - let peer = PeerId::random(); - let mut substream = MockSubstream::new(); - substream.expect_poll_next().times(1).return_once(|_| { - Poll::Ready(Some(Err(crate::error::SubstreamError::ConnectionClosed))) - }); - - executor.read_message( - peer, - Some(QueryId(1338)), - Substream::new_mock(peer, SubstreamId::from(0usize), Box::new(substream)), - ); - - match tokio::time::timeout(Duration::from_secs(20), executor.next()).await { - Ok(Some(QueryContext { - peer: queried_peer, - query_id, - result, - })) => { - assert_eq!(peer, queried_peer); - assert_eq!(query_id, Some(QueryId(1338))); - assert!(std::matches!( - result, - QueryResult::ReadFailure { - reason: FailureReason::SubstreamClosed - } - )); - } - result => panic!("invalid result received: {result:?}"), - } - } - - #[tokio::test] - async fn send_succeeds_no_message_read() { - let mut executor = QueryExecutor::new(); - let peer = PeerId::random(); - - // prepare substream which succeeds in sending the message but closes right after - let mut substream = MockSubstream::new(); - substream.expect_poll_ready().times(1).return_once(|_| Poll::Ready(Ok(()))); - substream.expect_start_send().times(1).return_once(|_| Ok(())); - substream.expect_poll_flush().times(1).return_once(|_| Poll::Ready(Ok(()))); - substream.expect_poll_next().times(1).return_once(|_| { - Poll::Ready(Some(Err(crate::error::SubstreamError::ConnectionClosed))) - }); - - executor.send_request_read_response( - peer, - Some(QueryId(1337)), - Bytes::from_static(b"hello, world"), - Substream::new_mock(peer, SubstreamId::from(0usize), Box::new(substream)), - ); - - match tokio::time::timeout(Duration::from_secs(20), executor.next()).await { - Ok(Some(QueryContext { - peer: queried_peer, - query_id, - result, - })) => { - assert_eq!(peer, queried_peer); - assert_eq!(query_id, Some(QueryId(1337))); - assert!(std::matches!( - result, - QueryResult::ReadFailure { - reason: FailureReason::SubstreamClosed - } - )); - } - result => panic!("invalid result received: {result:?}"), - } - } - - #[tokio::test] - async fn send_fails_no_message_read() { - let mut executor = QueryExecutor::new(); - let peer = PeerId::random(); - - // prepare substream which succeeds in sending the message but closes right after - let mut substream = MockSubstream::new(); - substream - .expect_poll_ready() - .times(1) - .return_once(|_| Poll::Ready(Err(crate::error::SubstreamError::ConnectionClosed))); - substream.expect_poll_close().times(1).return_once(|_| Poll::Ready(Ok(()))); - - executor.send_request_read_response( - peer, - Some(QueryId(1337)), - Bytes::from_static(b"hello, world"), - Substream::new_mock(peer, SubstreamId::from(0usize), Box::new(substream)), - ); - - match tokio::time::timeout(Duration::from_secs(20), executor.next()).await { - Ok(Some(QueryContext { - peer: queried_peer, - query_id, - result, - })) => { - assert_eq!(peer, queried_peer); - assert_eq!(query_id, Some(QueryId(1337))); - assert!(std::matches!( - result, - QueryResult::SendFailure { - reason: FailureReason::SubstreamClosed - } - )); - } - result => panic!("invalid result received: {result:?}"), - } - } - - #[tokio::test] - async fn read_message_timeout() { - let mut executor = QueryExecutor::new(); - let peer = PeerId::random(); - - // prepare substream which succeeds in sending the message but closes right after - let mut substream = MockSubstream::new(); - substream.expect_poll_next().returning(|_| Poll::Pending); - - executor.read_message( - peer, - Some(QueryId(1336)), - Substream::new_mock(peer, SubstreamId::from(0usize), Box::new(substream)), - ); - - match tokio::time::timeout(Duration::from_secs(20), executor.next()).await { - Ok(Some(QueryContext { - peer: queried_peer, - query_id, - result, - })) => { - assert_eq!(peer, queried_peer); - assert_eq!(query_id, Some(QueryId(1336))); - assert!(std::matches!( - result, - QueryResult::ReadFailure { - reason: FailureReason::Timeout - } - )); - } - result => panic!("invalid result received: {result:?}"), - } - } - - #[tokio::test] - async fn read_message_substream_closed() { - let mut executor = QueryExecutor::new(); - let peer = PeerId::random(); - - // prepare substream which succeeds in sending the message but closes right after - let mut substream = MockSubstream::new(); - substream - .expect_poll_next() - .times(1) - .return_once(|_| Poll::Ready(Some(Err(crate::error::SubstreamError::ChannelClogged)))); - - executor.read_message( - peer, - Some(QueryId(1335)), - Substream::new_mock(peer, SubstreamId::from(0usize), Box::new(substream)), - ); - - match tokio::time::timeout(Duration::from_secs(20), executor.next()).await { - Ok(Some(QueryContext { - peer: queried_peer, - query_id, - result, - })) => { - assert_eq!(peer, queried_peer); - assert_eq!(query_id, Some(QueryId(1335))); - assert!(std::matches!( - result, - QueryResult::ReadFailure { - reason: FailureReason::SubstreamClosed - } - )); - } - result => panic!("invalid result received: {result:?}"), - } - } + use super::*; + use crate::{mock::substream::MockSubstream, types::SubstreamId}; + + #[tokio::test] + async fn substream_read_timeout() { + let mut executor = QueryExecutor::new(); + let peer = PeerId::random(); + let mut substream = MockSubstream::new(); + substream.expect_poll_next().returning(|_| Poll::Pending); + let substream = Substream::new_mock(peer, SubstreamId::from(0usize), Box::new(substream)); + + executor.read_message(peer, None, substream); + + match tokio::time::timeout(Duration::from_secs(20), executor.next()).await { + Ok(Some(QueryContext { peer: queried_peer, query_id, result })) => { + assert_eq!(peer, queried_peer); + assert!(query_id.is_none()); + assert!(std::matches!( + result, + QueryResult::ReadFailure { reason: FailureReason::Timeout } + )); + }, + result => panic!("invalid result received: {result:?}"), + } + } + + #[tokio::test] + async fn substream_read_substream_closed() { + let mut executor = QueryExecutor::new(); + let peer = PeerId::random(); + let mut substream = MockSubstream::new(); + substream.expect_poll_next().times(1).return_once(|_| { + Poll::Ready(Some(Err(crate::error::SubstreamError::ConnectionClosed))) + }); + + executor.read_message( + peer, + Some(QueryId(1338)), + Substream::new_mock(peer, SubstreamId::from(0usize), Box::new(substream)), + ); + + match tokio::time::timeout(Duration::from_secs(20), executor.next()).await { + Ok(Some(QueryContext { peer: queried_peer, query_id, result })) => { + assert_eq!(peer, queried_peer); + assert_eq!(query_id, Some(QueryId(1338))); + assert!(std::matches!( + result, + QueryResult::ReadFailure { reason: FailureReason::SubstreamClosed } + )); + }, + result => panic!("invalid result received: {result:?}"), + } + } + + #[tokio::test] + async fn send_succeeds_no_message_read() { + let mut executor = QueryExecutor::new(); + let peer = PeerId::random(); + + // prepare substream which succeeds in sending the message but closes right after + let mut substream = MockSubstream::new(); + substream.expect_poll_ready().times(1).return_once(|_| Poll::Ready(Ok(()))); + substream.expect_start_send().times(1).return_once(|_| Ok(())); + substream.expect_poll_flush().times(1).return_once(|_| Poll::Ready(Ok(()))); + substream.expect_poll_next().times(1).return_once(|_| { + Poll::Ready(Some(Err(crate::error::SubstreamError::ConnectionClosed))) + }); + + executor.send_request_read_response( + peer, + Some(QueryId(1337)), + Bytes::from_static(b"hello, world"), + Substream::new_mock(peer, SubstreamId::from(0usize), Box::new(substream)), + ); + + match tokio::time::timeout(Duration::from_secs(20), executor.next()).await { + Ok(Some(QueryContext { peer: queried_peer, query_id, result })) => { + assert_eq!(peer, queried_peer); + assert_eq!(query_id, Some(QueryId(1337))); + assert!(std::matches!( + result, + QueryResult::ReadFailure { reason: FailureReason::SubstreamClosed } + )); + }, + result => panic!("invalid result received: {result:?}"), + } + } + + #[tokio::test] + async fn send_fails_no_message_read() { + let mut executor = QueryExecutor::new(); + let peer = PeerId::random(); + + // prepare substream which succeeds in sending the message but closes right after + let mut substream = MockSubstream::new(); + substream + .expect_poll_ready() + .times(1) + .return_once(|_| Poll::Ready(Err(crate::error::SubstreamError::ConnectionClosed))); + substream.expect_poll_close().times(1).return_once(|_| Poll::Ready(Ok(()))); + + executor.send_request_read_response( + peer, + Some(QueryId(1337)), + Bytes::from_static(b"hello, world"), + Substream::new_mock(peer, SubstreamId::from(0usize), Box::new(substream)), + ); + + match tokio::time::timeout(Duration::from_secs(20), executor.next()).await { + Ok(Some(QueryContext { peer: queried_peer, query_id, result })) => { + assert_eq!(peer, queried_peer); + assert_eq!(query_id, Some(QueryId(1337))); + assert!(std::matches!( + result, + QueryResult::SendFailure { reason: FailureReason::SubstreamClosed } + )); + }, + result => panic!("invalid result received: {result:?}"), + } + } + + #[tokio::test] + async fn read_message_timeout() { + let mut executor = QueryExecutor::new(); + let peer = PeerId::random(); + + // prepare substream which succeeds in sending the message but closes right after + let mut substream = MockSubstream::new(); + substream.expect_poll_next().returning(|_| Poll::Pending); + + executor.read_message( + peer, + Some(QueryId(1336)), + Substream::new_mock(peer, SubstreamId::from(0usize), Box::new(substream)), + ); + + match tokio::time::timeout(Duration::from_secs(20), executor.next()).await { + Ok(Some(QueryContext { peer: queried_peer, query_id, result })) => { + assert_eq!(peer, queried_peer); + assert_eq!(query_id, Some(QueryId(1336))); + assert!(std::matches!( + result, + QueryResult::ReadFailure { reason: FailureReason::Timeout } + )); + }, + result => panic!("invalid result received: {result:?}"), + } + } + + #[tokio::test] + async fn read_message_substream_closed() { + let mut executor = QueryExecutor::new(); + let peer = PeerId::random(); + + // prepare substream which succeeds in sending the message but closes right after + let mut substream = MockSubstream::new(); + substream + .expect_poll_next() + .times(1) + .return_once(|_| Poll::Ready(Some(Err(crate::error::SubstreamError::ChannelClogged)))); + + executor.read_message( + peer, + Some(QueryId(1335)), + Substream::new_mock(peer, SubstreamId::from(0usize), Box::new(substream)), + ); + + match tokio::time::timeout(Duration::from_secs(20), executor.next()).await { + Ok(Some(QueryContext { peer: queried_peer, query_id, result })) => { + assert_eq!(peer, queried_peer); + assert_eq!(query_id, Some(QueryId(1335))); + assert!(std::matches!( + result, + QueryResult::ReadFailure { reason: FailureReason::SubstreamClosed } + )); + }, + result => panic!("invalid result received: {result:?}"), + } + } } diff --git a/client/litep2p/src/protocol/libp2p/kademlia/handle.rs b/client/litep2p/src/protocol/libp2p/kademlia/handle.rs index da02d845..332553dd 100644 --- a/client/litep2p/src/protocol/libp2p/kademlia/handle.rs +++ b/client/litep2p/src/protocol/libp2p/kademlia/handle.rs @@ -19,8 +19,8 @@ // DEALINGS IN THE SOFTWARE. use crate::{ - protocol::libp2p::kademlia::{ContentProvider, PeerRecord, QueryId, Record, RecordKey}, - PeerId, + protocol::libp2p::kademlia::{ContentProvider, PeerRecord, QueryId, Record, RecordKey}, + PeerId, }; use futures::Stream; @@ -28,13 +28,13 @@ use multiaddr::Multiaddr; use tokio::sync::mpsc::{Receiver, Sender}; use std::{ - num::NonZeroUsize, - pin::Pin, - sync::{ - atomic::{AtomicUsize, Ordering}, - Arc, - }, - task::{Context, Poll}, + num::NonZeroUsize, + pin::Pin, + sync::{ + atomic::{AtomicUsize, Ordering}, + Arc, + }, + task::{Context, Poll}, }; /// Quorum. @@ -44,468 +44,438 @@ use std::{ #[derive(Debug, Copy, Clone, PartialEq, Eq)] #[cfg_attr(feature = "fuzz", derive(serde::Serialize, serde::Deserialize))] pub enum Quorum { - /// All peers must be successfully contacted. - All, + /// All peers must be successfully contacted. + All, - /// One peer must be successfully contacted. - One, + /// One peer must be successfully contacted. + One, - /// `N` peers must be successfully contacted. - N(NonZeroUsize), + /// `N` peers must be successfully contacted. + N(NonZeroUsize), } /// Routing table update mode. #[derive(Debug, Copy, Clone)] pub enum RoutingTableUpdateMode { - /// Don't insert discovered peers automatically to the routing tables but - /// allow user to do that by calling [`KademliaHandle::add_known_peer()`]. - Manual, + /// Don't insert discovered peers automatically to the routing tables but + /// allow user to do that by calling [`KademliaHandle::add_known_peer()`]. + Manual, - /// Automatically add all discovered peers to routing tables. - Automatic, + /// Automatically add all discovered peers to routing tables. + Automatic, } /// Incoming record validation mode. #[derive(Debug, Copy, Clone)] pub enum IncomingRecordValidationMode { - /// Don't insert incoming records automatically to the local DHT store - /// and let the user do that by calling [`KademliaHandle::store_record()`]. - Manual, + /// Don't insert incoming records automatically to the local DHT store + /// and let the user do that by calling [`KademliaHandle::store_record()`]. + Manual, - /// Automatically accept all incoming records. - Automatic, + /// Automatically accept all incoming records. + Automatic, } /// Kademlia commands. #[derive(Debug)] #[cfg_attr(feature = "fuzz", derive(serde::Serialize, serde::Deserialize))] pub enum KademliaCommand { - /// Add known peer. - AddKnownPeer { - /// Peer ID. - peer: PeerId, - - /// Addresses of peer. - addresses: Vec, - }, - - /// Send `FIND_NODE` message. - FindNode { - /// Peer ID. - peer: PeerId, - - /// Query ID for the query. - query_id: QueryId, - }, - - /// Store record to DHT. - PutRecord { - /// Record. - record: Record, - - /// [`Quorum`] for the query. - quorum: Quorum, - - /// Query ID for the query. - query_id: QueryId, - }, - - /// Store record to DHT to the given peers. - /// - /// Similar to [`KademliaCommand::PutRecord`] but allows user to specify the peers. - PutRecordToPeers { - /// Record. - record: Record, - - /// [`Quorum`] for the query. - quorum: Quorum, - - /// Query ID for the query. - query_id: QueryId, - - /// Use the following peers for the put request. - peers: Vec, - - /// Update local store. - update_local_store: bool, - }, - - /// Get record from DHT. - GetRecord { - /// Record key. - key: RecordKey, - - /// [`Quorum`] for the query. - quorum: Quorum, - - /// Query ID for the query. - query_id: QueryId, - }, - - /// Get providers from DHT. - GetProviders { - /// Provided key. - key: RecordKey, - - /// Query ID for the query. - query_id: QueryId, - }, - - /// Register as a content provider for `key`. - StartProviding { - /// Provided key. - key: RecordKey, - - /// [`Quorum`] for the query. - quorum: Quorum, - - /// Query ID for the query. - query_id: QueryId, - }, - - /// Stop providing the key locally and refreshing the provider. - StopProviding { - /// Provided key. - key: RecordKey, - }, - - /// Store record locally. - StoreRecord { - // Record. - record: Record, - }, + /// Add known peer. + AddKnownPeer { + /// Peer ID. + peer: PeerId, + + /// Addresses of peer. + addresses: Vec, + }, + + /// Send `FIND_NODE` message. + FindNode { + /// Peer ID. + peer: PeerId, + + /// Query ID for the query. + query_id: QueryId, + }, + + /// Store record to DHT. + PutRecord { + /// Record. + record: Record, + + /// [`Quorum`] for the query. + quorum: Quorum, + + /// Query ID for the query. + query_id: QueryId, + }, + + /// Store record to DHT to the given peers. + /// + /// Similar to [`KademliaCommand::PutRecord`] but allows user to specify the peers. + PutRecordToPeers { + /// Record. + record: Record, + + /// [`Quorum`] for the query. + quorum: Quorum, + + /// Query ID for the query. + query_id: QueryId, + + /// Use the following peers for the put request. + peers: Vec, + + /// Update local store. + update_local_store: bool, + }, + + /// Get record from DHT. + GetRecord { + /// Record key. + key: RecordKey, + + /// [`Quorum`] for the query. + quorum: Quorum, + + /// Query ID for the query. + query_id: QueryId, + }, + + /// Get providers from DHT. + GetProviders { + /// Provided key. + key: RecordKey, + + /// Query ID for the query. + query_id: QueryId, + }, + + /// Register as a content provider for `key`. + StartProviding { + /// Provided key. + key: RecordKey, + + /// [`Quorum`] for the query. + quorum: Quorum, + + /// Query ID for the query. + query_id: QueryId, + }, + + /// Stop providing the key locally and refreshing the provider. + StopProviding { + /// Provided key. + key: RecordKey, + }, + + /// Store record locally. + StoreRecord { + // Record. + record: Record, + }, } /// Kademlia events. #[derive(Debug, Clone)] pub enum KademliaEvent { - /// Result for the issued `FIND_NODE` query. - FindNodeSuccess { - /// Query ID. - query_id: QueryId, - - /// Target of the query - target: PeerId, - - /// Found nodes and their addresses. - peers: Vec<(PeerId, Vec)>, - }, - - /// Routing table update. - /// - /// Kademlia has discovered one or more peers that should be added to the routing table. - /// If [`RoutingTableUpdateMode`] is `Automatic`, user can ignore this event unless some - /// upper-level protocols has user for this information. - /// - /// If the mode was set to `Manual`, user should call [`KademliaHandle::add_known_peer()`] - /// in order to add the peers to routing table. - RoutingTableUpdate { - /// Discovered peers. - peers: Vec, - }, - - /// `GET_VALUE` query succeeded. - GetRecordSuccess { - /// Query ID. - query_id: QueryId, - }, - - /// `GET_VALUE` inflight query produced a result. - /// - /// This event is emitted when a peer responds to the query with a record. - GetRecordPartialResult { - /// Query ID. - query_id: QueryId, - - /// Found record. - record: PeerRecord, - }, - - /// `GET_PROVIDERS` query succeeded. - GetProvidersSuccess { - /// Query ID. - query_id: QueryId, - - /// Provided key. - provided_key: RecordKey, - - /// Found providers with cached addresses. Returned providers are sorted by distane to the - /// provided key. - providers: Vec, - }, - - /// `PUT_VALUE` query succeeded. - PutRecordSuccess { - /// Query ID. - query_id: QueryId, - - /// Record key. - key: RecordKey, - }, - - /// `ADD_PROVIDER` query succeeded. - AddProviderSuccess { - /// Query ID. - query_id: QueryId, - - /// Provided key. - provided_key: RecordKey, - }, - - /// Query failed. - QueryFailed { - /// Query ID. - query_id: QueryId, - }, - - /// Incoming `PUT_VALUE` request received. - /// - /// In case of using [`IncomingRecordValidationMode::Manual`] and successful validation - /// the record must be manually inserted into the local DHT store with - /// [`KademliaHandle::store_record()`]. - IncomingRecord { - /// Record. - record: Record, - }, - - /// Incoming `ADD_PROVIDER` request received. - IncomingProvider { - /// Provided key. - provided_key: RecordKey, - - /// Provider. - provider: ContentProvider, - }, + /// Result for the issued `FIND_NODE` query. + FindNodeSuccess { + /// Query ID. + query_id: QueryId, + + /// Target of the query + target: PeerId, + + /// Found nodes and their addresses. + peers: Vec<(PeerId, Vec)>, + }, + + /// Routing table update. + /// + /// Kademlia has discovered one or more peers that should be added to the routing table. + /// If [`RoutingTableUpdateMode`] is `Automatic`, user can ignore this event unless some + /// upper-level protocols has user for this information. + /// + /// If the mode was set to `Manual`, user should call [`KademliaHandle::add_known_peer()`] + /// in order to add the peers to routing table. + RoutingTableUpdate { + /// Discovered peers. + peers: Vec, + }, + + /// `GET_VALUE` query succeeded. + GetRecordSuccess { + /// Query ID. + query_id: QueryId, + }, + + /// `GET_VALUE` inflight query produced a result. + /// + /// This event is emitted when a peer responds to the query with a record. + GetRecordPartialResult { + /// Query ID. + query_id: QueryId, + + /// Found record. + record: PeerRecord, + }, + + /// `GET_PROVIDERS` query succeeded. + GetProvidersSuccess { + /// Query ID. + query_id: QueryId, + + /// Provided key. + provided_key: RecordKey, + + /// Found providers with cached addresses. Returned providers are sorted by distane to the + /// provided key. + providers: Vec, + }, + + /// `PUT_VALUE` query succeeded. + PutRecordSuccess { + /// Query ID. + query_id: QueryId, + + /// Record key. + key: RecordKey, + }, + + /// `ADD_PROVIDER` query succeeded. + AddProviderSuccess { + /// Query ID. + query_id: QueryId, + + /// Provided key. + provided_key: RecordKey, + }, + + /// Query failed. + QueryFailed { + /// Query ID. + query_id: QueryId, + }, + + /// Incoming `PUT_VALUE` request received. + /// + /// In case of using [`IncomingRecordValidationMode::Manual`] and successful validation + /// the record must be manually inserted into the local DHT store with + /// [`KademliaHandle::store_record()`]. + IncomingRecord { + /// Record. + record: Record, + }, + + /// Incoming `ADD_PROVIDER` request received. + IncomingProvider { + /// Provided key. + provided_key: RecordKey, + + /// Provider. + provider: ContentProvider, + }, } /// Handle for communicating with the Kademlia protocol. pub struct KademliaHandle { - /// TX channel for sending commands to `Kademlia`. - cmd_tx: Sender, + /// TX channel for sending commands to `Kademlia`. + cmd_tx: Sender, - /// RX channel for receiving events from `Kademlia`. - event_rx: Receiver, + /// RX channel for receiving events from `Kademlia`. + event_rx: Receiver, - /// Next query ID. - next_query_id: Arc, + /// Next query ID. + next_query_id: Arc, } impl KademliaHandle { - /// Create new [`KademliaHandle`]. - pub(super) fn new( - cmd_tx: Sender, - event_rx: Receiver, - next_query_id: Arc, - ) -> Self { - Self { - cmd_tx, - event_rx, - next_query_id, - } - } - - /// Allocate next query ID. - fn next_query_id(&mut self) -> QueryId { - let query_id = self.next_query_id.fetch_add(1, Ordering::Relaxed); - - QueryId(query_id) - } - - /// Add known peer. - pub async fn add_known_peer(&self, peer: PeerId, addresses: Vec) { - let _ = self.cmd_tx.send(KademliaCommand::AddKnownPeer { peer, addresses }).await; - } - - /// Send `FIND_NODE` query to known peers. - pub async fn find_node(&mut self, peer: PeerId) -> QueryId { - let query_id = self.next_query_id(); - let _ = self.cmd_tx.send(KademliaCommand::FindNode { peer, query_id }).await; - - query_id - } - - /// Store record to DHT. - pub async fn put_record(&mut self, record: Record, quorum: Quorum) -> QueryId { - let query_id = self.next_query_id(); - let _ = self - .cmd_tx - .send(KademliaCommand::PutRecord { - record, - quorum, - query_id, - }) - .await; - - query_id - } - - /// Store record to DHT to the given peers. - /// - /// Returns [`Err`] only if `Kademlia` is terminating. - pub async fn put_record_to_peers( - &mut self, - record: Record, - peers: Vec, - update_local_store: bool, - quorum: Quorum, - ) -> QueryId { - let query_id = self.next_query_id(); - let _ = self - .cmd_tx - .send(KademliaCommand::PutRecordToPeers { - record, - query_id, - peers, - update_local_store, - quorum, - }) - .await; - - query_id - } - - /// Get record from DHT. - /// - /// Returns [`Err`] only if `Kademlia` is terminating. - pub async fn get_record(&mut self, key: RecordKey, quorum: Quorum) -> QueryId { - let query_id = self.next_query_id(); - let _ = self - .cmd_tx - .send(KademliaCommand::GetRecord { - key, - quorum, - query_id, - }) - .await; - - query_id - } - - /// Register as a content provider on the DHT. - /// - /// Register the local peer ID & its `public_addresses` as a provider for a given `key`. - /// Returns [`Err`] only if `Kademlia` is terminating. - pub async fn start_providing(&mut self, key: RecordKey, quorum: Quorum) -> QueryId { - let query_id = self.next_query_id(); - let _ = self - .cmd_tx - .send(KademliaCommand::StartProviding { - key, - quorum, - query_id, - }) - .await; - - query_id - } - - /// Stop providing the key on the DHT. - /// - /// This will stop republishing the provider, but won't - /// remove it instantly from the nodes. It will be removed from them after the provider TTL - /// expires, set by default to 48 hours. - pub async fn stop_providing(&mut self, key: RecordKey) { - let _ = self.cmd_tx.send(KademliaCommand::StopProviding { key }).await; - } - - /// Get providers from DHT. - /// - /// Returns [`Err`] only if `Kademlia` is terminating. - pub async fn get_providers(&mut self, key: RecordKey) -> QueryId { - let query_id = self.next_query_id(); - let _ = self.cmd_tx.send(KademliaCommand::GetProviders { key, query_id }).await; - - query_id - } - - /// Store the record in the local store. Used in combination with - /// [`IncomingRecordValidationMode::Manual`]. - pub async fn store_record(&mut self, record: Record) { - let _ = self.cmd_tx.send(KademliaCommand::StoreRecord { record }).await; - } - - /// Try to add known peer and if the channel is clogged, return an error. - pub fn try_add_known_peer(&self, peer: PeerId, addresses: Vec) -> Result<(), ()> { - self.cmd_tx - .try_send(KademliaCommand::AddKnownPeer { peer, addresses }) - .map_err(|_| ()) - } - - /// Try to initiate `FIND_NODE` query and if the channel is clogged, return an error. - pub fn try_find_node(&mut self, peer: PeerId) -> Result { - let query_id = self.next_query_id(); - self.cmd_tx - .try_send(KademliaCommand::FindNode { peer, query_id }) - .map(|_| query_id) - .map_err(|_| ()) - } - - /// Try to initiate `PUT_VALUE` query and if the channel is clogged, return an error. - pub fn try_put_record(&mut self, record: Record, quorum: Quorum) -> Result { - let query_id = self.next_query_id(); - self.cmd_tx - .try_send(KademliaCommand::PutRecord { - record, - query_id, - quorum, - }) - .map(|_| query_id) - .map_err(|_| ()) - } - - /// Try to initiate `PUT_VALUE` query to the given peers and if the channel is clogged, - /// return an error. - pub fn try_put_record_to_peers( - &mut self, - record: Record, - peers: Vec, - update_local_store: bool, - quorum: Quorum, - ) -> Result { - let query_id = self.next_query_id(); - self.cmd_tx - .try_send(KademliaCommand::PutRecordToPeers { - record, - query_id, - peers, - update_local_store, - quorum, - }) - .map(|_| query_id) - .map_err(|_| ()) - } - - /// Try to initiate `GET_VALUE` query and if the channel is clogged, return an error. - pub fn try_get_record(&mut self, key: RecordKey, quorum: Quorum) -> Result { - let query_id = self.next_query_id(); - self.cmd_tx - .try_send(KademliaCommand::GetRecord { - key, - quorum, - query_id, - }) - .map(|_| query_id) - .map_err(|_| ()) - } - - /// Try to store the record in the local store, and if the channel is clogged, return an error. - /// Used in combination with [`IncomingRecordValidationMode::Manual`]. - pub fn try_store_record(&mut self, record: Record) -> Result<(), ()> { - self.cmd_tx.try_send(KademliaCommand::StoreRecord { record }).map_err(|_| ()) - } - - #[cfg(feature = "fuzz")] - /// Expose functionality for fuzzing - pub async fn fuzz_send_message(&mut self, command: KademliaCommand) -> crate::Result<()> { - let _ = self.cmd_tx.send(command).await; - Ok(()) - } + /// Create new [`KademliaHandle`]. + pub(super) fn new( + cmd_tx: Sender, + event_rx: Receiver, + next_query_id: Arc, + ) -> Self { + Self { cmd_tx, event_rx, next_query_id } + } + + /// Allocate next query ID. + fn next_query_id(&mut self) -> QueryId { + let query_id = self.next_query_id.fetch_add(1, Ordering::Relaxed); + + QueryId(query_id) + } + + /// Add known peer. + pub async fn add_known_peer(&self, peer: PeerId, addresses: Vec) { + let _ = self.cmd_tx.send(KademliaCommand::AddKnownPeer { peer, addresses }).await; + } + + /// Send `FIND_NODE` query to known peers. + pub async fn find_node(&mut self, peer: PeerId) -> QueryId { + let query_id = self.next_query_id(); + let _ = self.cmd_tx.send(KademliaCommand::FindNode { peer, query_id }).await; + + query_id + } + + /// Store record to DHT. + pub async fn put_record(&mut self, record: Record, quorum: Quorum) -> QueryId { + let query_id = self.next_query_id(); + let _ = self.cmd_tx.send(KademliaCommand::PutRecord { record, quorum, query_id }).await; + + query_id + } + + /// Store record to DHT to the given peers. + /// + /// Returns [`Err`] only if `Kademlia` is terminating. + pub async fn put_record_to_peers( + &mut self, + record: Record, + peers: Vec, + update_local_store: bool, + quorum: Quorum, + ) -> QueryId { + let query_id = self.next_query_id(); + let _ = self + .cmd_tx + .send(KademliaCommand::PutRecordToPeers { + record, + query_id, + peers, + update_local_store, + quorum, + }) + .await; + + query_id + } + + /// Get record from DHT. + /// + /// Returns [`Err`] only if `Kademlia` is terminating. + pub async fn get_record(&mut self, key: RecordKey, quorum: Quorum) -> QueryId { + let query_id = self.next_query_id(); + let _ = self.cmd_tx.send(KademliaCommand::GetRecord { key, quorum, query_id }).await; + + query_id + } + + /// Register as a content provider on the DHT. + /// + /// Register the local peer ID & its `public_addresses` as a provider for a given `key`. + /// Returns [`Err`] only if `Kademlia` is terminating. + pub async fn start_providing(&mut self, key: RecordKey, quorum: Quorum) -> QueryId { + let query_id = self.next_query_id(); + let _ = self + .cmd_tx + .send(KademliaCommand::StartProviding { key, quorum, query_id }) + .await; + + query_id + } + + /// Stop providing the key on the DHT. + /// + /// This will stop republishing the provider, but won't + /// remove it instantly from the nodes. It will be removed from them after the provider TTL + /// expires, set by default to 48 hours. + pub async fn stop_providing(&mut self, key: RecordKey) { + let _ = self.cmd_tx.send(KademliaCommand::StopProviding { key }).await; + } + + /// Get providers from DHT. + /// + /// Returns [`Err`] only if `Kademlia` is terminating. + pub async fn get_providers(&mut self, key: RecordKey) -> QueryId { + let query_id = self.next_query_id(); + let _ = self.cmd_tx.send(KademliaCommand::GetProviders { key, query_id }).await; + + query_id + } + + /// Store the record in the local store. Used in combination with + /// [`IncomingRecordValidationMode::Manual`]. + pub async fn store_record(&mut self, record: Record) { + let _ = self.cmd_tx.send(KademliaCommand::StoreRecord { record }).await; + } + + /// Try to add known peer and if the channel is clogged, return an error. + pub fn try_add_known_peer(&self, peer: PeerId, addresses: Vec) -> Result<(), ()> { + self.cmd_tx + .try_send(KademliaCommand::AddKnownPeer { peer, addresses }) + .map_err(|_| ()) + } + + /// Try to initiate `FIND_NODE` query and if the channel is clogged, return an error. + pub fn try_find_node(&mut self, peer: PeerId) -> Result { + let query_id = self.next_query_id(); + self.cmd_tx + .try_send(KademliaCommand::FindNode { peer, query_id }) + .map(|_| query_id) + .map_err(|_| ()) + } + + /// Try to initiate `PUT_VALUE` query and if the channel is clogged, return an error. + pub fn try_put_record(&mut self, record: Record, quorum: Quorum) -> Result { + let query_id = self.next_query_id(); + self.cmd_tx + .try_send(KademliaCommand::PutRecord { record, query_id, quorum }) + .map(|_| query_id) + .map_err(|_| ()) + } + + /// Try to initiate `PUT_VALUE` query to the given peers and if the channel is clogged, + /// return an error. + pub fn try_put_record_to_peers( + &mut self, + record: Record, + peers: Vec, + update_local_store: bool, + quorum: Quorum, + ) -> Result { + let query_id = self.next_query_id(); + self.cmd_tx + .try_send(KademliaCommand::PutRecordToPeers { + record, + query_id, + peers, + update_local_store, + quorum, + }) + .map(|_| query_id) + .map_err(|_| ()) + } + + /// Try to initiate `GET_VALUE` query and if the channel is clogged, return an error. + pub fn try_get_record(&mut self, key: RecordKey, quorum: Quorum) -> Result { + let query_id = self.next_query_id(); + self.cmd_tx + .try_send(KademliaCommand::GetRecord { key, quorum, query_id }) + .map(|_| query_id) + .map_err(|_| ()) + } + + /// Try to store the record in the local store, and if the channel is clogged, return an error. + /// Used in combination with [`IncomingRecordValidationMode::Manual`]. + pub fn try_store_record(&mut self, record: Record) -> Result<(), ()> { + self.cmd_tx.try_send(KademliaCommand::StoreRecord { record }).map_err(|_| ()) + } + + #[cfg(feature = "fuzz")] + /// Expose functionality for fuzzing + pub async fn fuzz_send_message(&mut self, command: KademliaCommand) -> crate::Result<()> { + let _ = self.cmd_tx.send(command).await; + Ok(()) + } } impl Stream for KademliaHandle { - type Item = KademliaEvent; + type Item = KademliaEvent; - fn poll_next(mut self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll> { - self.event_rx.poll_recv(cx) - } + fn poll_next(mut self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll> { + self.event_rx.poll_recv(cx) + } } diff --git a/client/litep2p/src/protocol/libp2p/kademlia/message.rs b/client/litep2p/src/protocol/libp2p/kademlia/message.rs index ad1b4d54..cfcf80f7 100644 --- a/client/litep2p/src/protocol/libp2p/kademlia/message.rs +++ b/client/litep2p/src/protocol/libp2p/kademlia/message.rs @@ -19,12 +19,12 @@ // DEALINGS IN THE SOFTWARE. use crate::{ - protocol::libp2p::kademlia::{ - record::{ContentProvider, Key as RecordKey, Record}, - schema, - types::{ConnectionType, KademliaPeer}, - }, - PeerId, + protocol::libp2p::kademlia::{ + record::{ContentProvider, Key as RecordKey, Record}, + schema, + types::{ConnectionType, KademliaPeer}, + }, + PeerId, }; use bytes::{Bytes, BytesMut}; @@ -38,402 +38,389 @@ const LOG_TARGET: &str = "litep2p::ipfs::kademlia::message"; /// Kademlia message. #[derive(Debug, Clone, EnumDisplay)] pub enum KademliaMessage { - /// `FIND_NODE` message. - FindNode { - /// Query target. - target: Vec, - - /// Found peers. - peers: Vec, - }, - - /// Kademlia `PUT_VALUE` message. - PutValue { - /// Record. - record: Record, - }, - - /// `GET_VALUE` message. - GetRecord { - /// Key. - key: Option, - - /// Record. - record: Option, - - /// Peers closer to the key. - peers: Vec, - }, - - /// `ADD_PROVIDER` message. - AddProvider { - /// Key. - key: RecordKey, - - /// Peers, providing the data for `key`. Must contain exactly one peer matching the sender - /// of the message. - providers: Vec, - }, - - /// `GET_PROVIDERS` message. - GetProviders { - /// Key. `None` in response. - key: Option, - - /// Peers closer to the key. - peers: Vec, - - /// Peers, providing the data for `key`. - providers: Vec, - }, + /// `FIND_NODE` message. + FindNode { + /// Query target. + target: Vec, + + /// Found peers. + peers: Vec, + }, + + /// Kademlia `PUT_VALUE` message. + PutValue { + /// Record. + record: Record, + }, + + /// `GET_VALUE` message. + GetRecord { + /// Key. + key: Option, + + /// Record. + record: Option, + + /// Peers closer to the key. + peers: Vec, + }, + + /// `ADD_PROVIDER` message. + AddProvider { + /// Key. + key: RecordKey, + + /// Peers, providing the data for `key`. Must contain exactly one peer matching the sender + /// of the message. + providers: Vec, + }, + + /// `GET_PROVIDERS` message. + GetProviders { + /// Key. `None` in response. + key: Option, + + /// Peers closer to the key. + peers: Vec, + + /// Peers, providing the data for `key`. + providers: Vec, + }, } impl KademliaMessage { - /// Create `FIND_NODE` message for `peer`. - pub fn find_node>>(key: T) -> Bytes { - let message = schema::kademlia::Message { - key: key.into(), - r#type: schema::kademlia::MessageType::FindNode.into(), - cluster_level_raw: 10, - ..Default::default() - }; - - let mut buf = BytesMut::with_capacity(message.encoded_len()); - message.encode(&mut buf).expect("Vec to provide needed capacity"); - - buf.freeze() - } - - /// Create `PUT_VALUE` message for `record`. - pub fn put_value(record: Record) -> Bytes { - let message = schema::kademlia::Message { - key: record.key.clone().into(), - r#type: schema::kademlia::MessageType::PutValue.into(), - record: Some(record_to_schema(record)), - cluster_level_raw: 10, - ..Default::default() - }; - - let mut buf = BytesMut::with_capacity(message.encoded_len()); - message.encode(&mut buf).expect("BytesMut to provide needed capacity"); - - buf.freeze() - } - - /// Create `GET_VALUE` message for `record`. - pub fn get_record(key: RecordKey) -> Bytes { - let message = schema::kademlia::Message { - key: key.clone().into(), - r#type: schema::kademlia::MessageType::GetValue.into(), - cluster_level_raw: 10, - ..Default::default() - }; - - let mut buf = BytesMut::with_capacity(message.encoded_len()); - message.encode(&mut buf).expect("BytesMut to provide needed capacity"); - - buf.freeze() - } - - /// Create `FIND_NODE` response. - pub fn find_node_response>(key: K, peers: Vec) -> Vec { - let message = schema::kademlia::Message { - key: key.as_ref().to_vec(), - cluster_level_raw: 10, - r#type: schema::kademlia::MessageType::FindNode.into(), - closer_peers: peers.iter().map(|peer| peer.into()).collect(), - ..Default::default() - }; - - let mut buf = Vec::with_capacity(message.encoded_len()); - message.encode(&mut buf).expect("Vec to provide needed capacity"); - - buf - } - - /// Create `PUT_VALUE` response. - pub fn put_value_response(key: RecordKey, value: Vec) -> Bytes { - let message = schema::kademlia::Message { - key: key.to_vec(), - cluster_level_raw: 10, - r#type: schema::kademlia::MessageType::PutValue.into(), - record: Some(schema::kademlia::Record { - key: key.to_vec(), - value, - ..Default::default() - }), - ..Default::default() - }; - - let mut buf = BytesMut::with_capacity(message.encoded_len()); - message.encode(&mut buf).expect("BytesMut to provide needed capacity"); - - buf.freeze() - } - - /// Create `GET_VALUE` response. - pub fn get_value_response( - key: RecordKey, - peers: Vec, - record: Option, - ) -> Vec { - let message = schema::kademlia::Message { - key: key.to_vec(), - cluster_level_raw: 10, - r#type: schema::kademlia::MessageType::GetValue.into(), - closer_peers: peers.iter().map(|peer| peer.into()).collect(), - record: record.map(record_to_schema), - ..Default::default() - }; - - let mut buf = Vec::with_capacity(message.encoded_len()); - message.encode(&mut buf).expect("Vec to provide needed capacity"); - - buf - } - - /// Create `ADD_PROVIDER` message with `provider`. - pub fn add_provider(provided_key: RecordKey, provider: ContentProvider) -> Bytes { - let peer = KademliaPeer::new( - provider.peer, - provider.addresses, - ConnectionType::CanConnect, // ignored by message recipient - ); - let message = schema::kademlia::Message { - key: provided_key.clone().to_vec(), - cluster_level_raw: 10, - r#type: schema::kademlia::MessageType::AddProvider.into(), - provider_peers: std::iter::once((&peer).into()).collect(), - ..Default::default() - }; - - let mut buf = BytesMut::with_capacity(message.encoded_len()); - message.encode(&mut buf).expect("BytesMut to provide needed capacity"); - - buf.freeze() - } - - /// Create `GET_PROVIDERS` request for `key`. - pub fn get_providers_request(key: RecordKey) -> Bytes { - let message = schema::kademlia::Message { - key: key.to_vec(), - cluster_level_raw: 10, - r#type: schema::kademlia::MessageType::GetProviders.into(), - ..Default::default() - }; - - let mut buf = BytesMut::with_capacity(message.encoded_len()); - message.encode(&mut buf).expect("BytesMut to provide needed capacity"); - - buf.freeze() - } - - /// Create `GET_PROVIDERS` response. - pub fn get_providers_response( - providers: Vec, - closer_peers: &[KademliaPeer], - ) -> Vec { - let provider_peers = providers - .into_iter() - .map(|p| { - KademliaPeer::new( - p.peer, - p.addresses, - // `ConnectionType` is ignored by a recipient - ConnectionType::NotConnected, - ) - }) - .map(|p| (&p).into()) - .collect(); - - let message = schema::kademlia::Message { - cluster_level_raw: 10, - r#type: schema::kademlia::MessageType::GetProviders.into(), - closer_peers: closer_peers.iter().map(Into::into).collect(), - provider_peers, - ..Default::default() - }; - - let mut buf = Vec::with_capacity(message.encoded_len()); - message.encode(&mut buf).expect("Vec to provide needed capacity"); - - buf - } - - /// Get [`KademliaMessage`] from bytes. - pub fn from_bytes(bytes: BytesMut, replication_factor: usize) -> Option { - match schema::kademlia::Message::decode(bytes) { - Ok(message) => match message.r#type { - // FIND_NODE - 4 => { - let peers = message - .closer_peers - .iter() - .filter_map(|peer| KademliaPeer::try_from(peer).ok()) - .take(replication_factor) - .collect(); - - Some(Self::FindNode { - target: message.key, - peers, - }) - } - // PUT_VALUE - 0 => { - let record = message.record?; - - Some(Self::PutValue { - record: record_from_schema(record)?, - }) - } - // GET_VALUE - 1 => { - let key = match message.key.is_empty() { - true => message.record.as_ref().and_then(|record| { - (!record.key.is_empty()).then_some(RecordKey::from(record.key.clone())) - }), - false => Some(RecordKey::from(message.key.clone())), - }; - - let record = if let Some(record) = message.record { - Some(record_from_schema(record)?) - } else { - None - }; - - Some(Self::GetRecord { - key, - record, - peers: message - .closer_peers - .iter() - .filter_map(|peer| KademliaPeer::try_from(peer).ok()) - .take(replication_factor) - .collect(), - }) - } - // ADD_PROVIDER - 2 => { - let key = (!message.key.is_empty()).then_some(message.key.into())?; - let providers = message - .provider_peers - .iter() - .filter_map(|peer| KademliaPeer::try_from(peer).ok()) - .take(replication_factor) - .collect(); - - Some(Self::AddProvider { key, providers }) - } - // GET_PROVIDERS - 3 => { - let key = (!message.key.is_empty()).then_some(message.key.into()); - let peers = message - .closer_peers - .iter() - .filter_map(|peer| KademliaPeer::try_from(peer).ok()) - .take(replication_factor) - .collect(); - let providers = message - .provider_peers - .iter() - .filter_map(|peer| KademliaPeer::try_from(peer).ok()) - .take(replication_factor) - .collect(); - - Some(Self::GetProviders { - key, - peers, - providers, - }) - } - message_type => { - tracing::warn!(target: LOG_TARGET, ?message_type, "unhandled message"); - None - } - }, - Err(error) => { - tracing::debug!(target: LOG_TARGET, ?error, "failed to decode message"); - None - } - } - } + /// Create `FIND_NODE` message for `peer`. + pub fn find_node>>(key: T) -> Bytes { + let message = schema::kademlia::Message { + key: key.into(), + r#type: schema::kademlia::MessageType::FindNode.into(), + cluster_level_raw: 10, + ..Default::default() + }; + + let mut buf = BytesMut::with_capacity(message.encoded_len()); + message.encode(&mut buf).expect("Vec to provide needed capacity"); + + buf.freeze() + } + + /// Create `PUT_VALUE` message for `record`. + pub fn put_value(record: Record) -> Bytes { + let message = schema::kademlia::Message { + key: record.key.clone().into(), + r#type: schema::kademlia::MessageType::PutValue.into(), + record: Some(record_to_schema(record)), + cluster_level_raw: 10, + ..Default::default() + }; + + let mut buf = BytesMut::with_capacity(message.encoded_len()); + message.encode(&mut buf).expect("BytesMut to provide needed capacity"); + + buf.freeze() + } + + /// Create `GET_VALUE` message for `record`. + pub fn get_record(key: RecordKey) -> Bytes { + let message = schema::kademlia::Message { + key: key.clone().into(), + r#type: schema::kademlia::MessageType::GetValue.into(), + cluster_level_raw: 10, + ..Default::default() + }; + + let mut buf = BytesMut::with_capacity(message.encoded_len()); + message.encode(&mut buf).expect("BytesMut to provide needed capacity"); + + buf.freeze() + } + + /// Create `FIND_NODE` response. + pub fn find_node_response>(key: K, peers: Vec) -> Vec { + let message = schema::kademlia::Message { + key: key.as_ref().to_vec(), + cluster_level_raw: 10, + r#type: schema::kademlia::MessageType::FindNode.into(), + closer_peers: peers.iter().map(|peer| peer.into()).collect(), + ..Default::default() + }; + + let mut buf = Vec::with_capacity(message.encoded_len()); + message.encode(&mut buf).expect("Vec to provide needed capacity"); + + buf + } + + /// Create `PUT_VALUE` response. + pub fn put_value_response(key: RecordKey, value: Vec) -> Bytes { + let message = schema::kademlia::Message { + key: key.to_vec(), + cluster_level_raw: 10, + r#type: schema::kademlia::MessageType::PutValue.into(), + record: Some(schema::kademlia::Record { + key: key.to_vec(), + value, + ..Default::default() + }), + ..Default::default() + }; + + let mut buf = BytesMut::with_capacity(message.encoded_len()); + message.encode(&mut buf).expect("BytesMut to provide needed capacity"); + + buf.freeze() + } + + /// Create `GET_VALUE` response. + pub fn get_value_response( + key: RecordKey, + peers: Vec, + record: Option, + ) -> Vec { + let message = schema::kademlia::Message { + key: key.to_vec(), + cluster_level_raw: 10, + r#type: schema::kademlia::MessageType::GetValue.into(), + closer_peers: peers.iter().map(|peer| peer.into()).collect(), + record: record.map(record_to_schema), + ..Default::default() + }; + + let mut buf = Vec::with_capacity(message.encoded_len()); + message.encode(&mut buf).expect("Vec to provide needed capacity"); + + buf + } + + /// Create `ADD_PROVIDER` message with `provider`. + pub fn add_provider(provided_key: RecordKey, provider: ContentProvider) -> Bytes { + let peer = KademliaPeer::new( + provider.peer, + provider.addresses, + ConnectionType::CanConnect, // ignored by message recipient + ); + let message = schema::kademlia::Message { + key: provided_key.clone().to_vec(), + cluster_level_raw: 10, + r#type: schema::kademlia::MessageType::AddProvider.into(), + provider_peers: std::iter::once((&peer).into()).collect(), + ..Default::default() + }; + + let mut buf = BytesMut::with_capacity(message.encoded_len()); + message.encode(&mut buf).expect("BytesMut to provide needed capacity"); + + buf.freeze() + } + + /// Create `GET_PROVIDERS` request for `key`. + pub fn get_providers_request(key: RecordKey) -> Bytes { + let message = schema::kademlia::Message { + key: key.to_vec(), + cluster_level_raw: 10, + r#type: schema::kademlia::MessageType::GetProviders.into(), + ..Default::default() + }; + + let mut buf = BytesMut::with_capacity(message.encoded_len()); + message.encode(&mut buf).expect("BytesMut to provide needed capacity"); + + buf.freeze() + } + + /// Create `GET_PROVIDERS` response. + pub fn get_providers_response( + providers: Vec, + closer_peers: &[KademliaPeer], + ) -> Vec { + let provider_peers = providers + .into_iter() + .map(|p| { + KademliaPeer::new( + p.peer, + p.addresses, + // `ConnectionType` is ignored by a recipient + ConnectionType::NotConnected, + ) + }) + .map(|p| (&p).into()) + .collect(); + + let message = schema::kademlia::Message { + cluster_level_raw: 10, + r#type: schema::kademlia::MessageType::GetProviders.into(), + closer_peers: closer_peers.iter().map(Into::into).collect(), + provider_peers, + ..Default::default() + }; + + let mut buf = Vec::with_capacity(message.encoded_len()); + message.encode(&mut buf).expect("Vec to provide needed capacity"); + + buf + } + + /// Get [`KademliaMessage`] from bytes. + pub fn from_bytes(bytes: BytesMut, replication_factor: usize) -> Option { + match schema::kademlia::Message::decode(bytes) { + Ok(message) => match message.r#type { + // FIND_NODE + 4 => { + let peers = message + .closer_peers + .iter() + .filter_map(|peer| KademliaPeer::try_from(peer).ok()) + .take(replication_factor) + .collect(); + + Some(Self::FindNode { target: message.key, peers }) + }, + // PUT_VALUE + 0 => { + let record = message.record?; + + Some(Self::PutValue { record: record_from_schema(record)? }) + }, + // GET_VALUE + 1 => { + let key = match message.key.is_empty() { + true => message.record.as_ref().and_then(|record| { + (!record.key.is_empty()).then_some(RecordKey::from(record.key.clone())) + }), + false => Some(RecordKey::from(message.key.clone())), + }; + + let record = if let Some(record) = message.record { + Some(record_from_schema(record)?) + } else { + None + }; + + Some(Self::GetRecord { + key, + record, + peers: message + .closer_peers + .iter() + .filter_map(|peer| KademliaPeer::try_from(peer).ok()) + .take(replication_factor) + .collect(), + }) + }, + // ADD_PROVIDER + 2 => { + let key = (!message.key.is_empty()).then_some(message.key.into())?; + let providers = message + .provider_peers + .iter() + .filter_map(|peer| KademliaPeer::try_from(peer).ok()) + .take(replication_factor) + .collect(); + + Some(Self::AddProvider { key, providers }) + }, + // GET_PROVIDERS + 3 => { + let key = (!message.key.is_empty()).then_some(message.key.into()); + let peers = message + .closer_peers + .iter() + .filter_map(|peer| KademliaPeer::try_from(peer).ok()) + .take(replication_factor) + .collect(); + let providers = message + .provider_peers + .iter() + .filter_map(|peer| KademliaPeer::try_from(peer).ok()) + .take(replication_factor) + .collect(); + + Some(Self::GetProviders { key, peers, providers }) + }, + message_type => { + tracing::warn!(target: LOG_TARGET, ?message_type, "unhandled message"); + None + }, + }, + Err(error) => { + tracing::debug!(target: LOG_TARGET, ?error, "failed to decode message"); + None + }, + } + } } fn record_to_schema(record: Record) -> schema::kademlia::Record { - schema::kademlia::Record { - key: record.key.into(), - value: record.value, - time_received: String::new(), - publisher: record.publisher.map(|peer_id| peer_id.to_bytes()).unwrap_or_default(), - ttl: record - .expires - .map(|expires| { - let now = Instant::now(); - if expires > now { - u32::try_from((expires - now).as_secs()).unwrap_or(u32::MAX) - } else { - 1 // because 0 means "does not expire" - } - }) - .unwrap_or(0), - } + schema::kademlia::Record { + key: record.key.into(), + value: record.value, + time_received: String::new(), + publisher: record.publisher.map(|peer_id| peer_id.to_bytes()).unwrap_or_default(), + ttl: record + .expires + .map(|expires| { + let now = Instant::now(); + if expires > now { + u32::try_from((expires - now).as_secs()).unwrap_or(u32::MAX) + } else { + 1 // because 0 means "does not expire" + } + }) + .unwrap_or(0), + } } fn record_from_schema(record: schema::kademlia::Record) -> Option { - Some(Record { - key: record.key.into(), - value: record.value, - publisher: if !record.publisher.is_empty() { - Some(PeerId::from_bytes(&record.publisher).ok()?) - } else { - None - }, - expires: if record.ttl > 0 { - Some(Instant::now() + Duration::from_secs(record.ttl as u64)) - } else { - None - }, - }) + Some(Record { + key: record.key.into(), + value: record.value, + publisher: if !record.publisher.is_empty() { + Some(PeerId::from_bytes(&record.publisher).ok()?) + } else { + None + }, + expires: if record.ttl > 0 { + Some(Instant::now() + Duration::from_secs(record.ttl as u64)) + } else { + None + }, + }) } #[cfg(test)] mod tests { - use super::*; - - #[test] - fn non_empty_publisher_and_ttl_are_preserved() { - let expires = Instant::now() + Duration::from_secs(3600); - - let record = Record { - key: vec![1, 2, 3].into(), - value: vec![17], - publisher: Some(PeerId::random()), - expires: Some(expires), - }; - - let got_record = record_from_schema(record_to_schema(record.clone())).unwrap(); - - assert_eq!(got_record.key, record.key); - assert_eq!(got_record.value, record.value); - assert_eq!(got_record.publisher, record.publisher); - - // Check that the expiration time is sane. - let got_expires = got_record.expires.unwrap(); - assert!(got_expires - expires >= Duration::ZERO); - assert!(got_expires - expires < Duration::from_secs(10)); - } - - #[test] - fn empty_publisher_and_ttl_are_preserved() { - let record = Record { - key: vec![1, 2, 3].into(), - value: vec![17], - publisher: None, - expires: None, - }; - - let got_record = record_from_schema(record_to_schema(record.clone())).unwrap(); - - assert_eq!(got_record, record); - } + use super::*; + + #[test] + fn non_empty_publisher_and_ttl_are_preserved() { + let expires = Instant::now() + Duration::from_secs(3600); + + let record = Record { + key: vec![1, 2, 3].into(), + value: vec![17], + publisher: Some(PeerId::random()), + expires: Some(expires), + }; + + let got_record = record_from_schema(record_to_schema(record.clone())).unwrap(); + + assert_eq!(got_record.key, record.key); + assert_eq!(got_record.value, record.value); + assert_eq!(got_record.publisher, record.publisher); + + // Check that the expiration time is sane. + let got_expires = got_record.expires.unwrap(); + assert!(got_expires - expires >= Duration::ZERO); + assert!(got_expires - expires < Duration::from_secs(10)); + } + + #[test] + fn empty_publisher_and_ttl_are_preserved() { + let record = + Record { key: vec![1, 2, 3].into(), value: vec![17], publisher: None, expires: None }; + + let got_record = record_from_schema(record_to_schema(record.clone())).unwrap(); + + assert_eq!(got_record, record); + } } diff --git a/client/litep2p/src/protocol/libp2p/kademlia/mod.rs b/client/litep2p/src/protocol/libp2p/kademlia/mod.rs index e476d44c..b5e19344 100644 --- a/client/litep2p/src/protocol/libp2p/kademlia/mod.rs +++ b/client/litep2p/src/protocol/libp2p/kademlia/mod.rs @@ -21,23 +21,23 @@ //! [`/ipfs/kad/1.0.0`](https://github.com/libp2p/specs/blob/master/kad-dht/README.md) implementation. use crate::{ - error::{Error, ImmediateDialError, SubstreamError}, - protocol::{ - libp2p::kademlia::{ - bucket::KBucketEntry, - executor::{QueryContext, QueryExecutor, QueryResult}, - message::KademliaMessage, - query::{QueryAction, QueryEngine}, - routing_table::RoutingTable, - store::{MemoryStore, MemoryStoreAction}, - types::{ConnectionType, KademliaPeer, Key}, - }, - Direction, TransportEvent, TransportService, - }, - substream::Substream, - transport::Endpoint, - types::SubstreamId, - PeerId, + error::{Error, ImmediateDialError, SubstreamError}, + protocol::{ + libp2p::kademlia::{ + bucket::KBucketEntry, + executor::{QueryContext, QueryExecutor, QueryResult}, + message::KademliaMessage, + query::{QueryAction, QueryEngine}, + routing_table::RoutingTable, + store::{MemoryStore, MemoryStoreAction}, + types::{ConnectionType, KademliaPeer, Key}, + }, + Direction, TransportEvent, TransportService, + }, + substream::Substream, + transport::Endpoint, + types::SubstreamId, + PeerId, }; use bytes::{Bytes, BytesMut}; @@ -46,18 +46,18 @@ use multiaddr::Multiaddr; use tokio::sync::mpsc::{Receiver, Sender}; use std::{ - collections::{hash_map::Entry, HashMap}, - sync::{ - atomic::{AtomicUsize, Ordering}, - Arc, - }, - time::{Duration, Instant}, + collections::{hash_map::Entry, HashMap}, + sync::{ + atomic::{AtomicUsize, Ordering}, + Arc, + }, + time::{Duration, Instant}, }; pub use config::{Config, ConfigBuilder}; pub use handle::{ - IncomingRecordValidationMode, KademliaCommand, KademliaEvent, KademliaHandle, Quorum, - RoutingTableUpdateMode, + IncomingRecordValidationMode, KademliaCommand, KademliaEvent, KademliaHandle, Quorum, + RoutingTableUpdateMode, }; pub use query::QueryId; pub use record::{ContentProvider, Key as RecordKey, PeerRecord, Record}; @@ -80,1569 +80,1478 @@ mod store; mod types; mod schema { - pub(super) mod kademlia { - include!(concat!(env!("OUT_DIR"), "/kademlia.rs")); - } + pub(super) mod kademlia { + include!(concat!(env!("OUT_DIR"), "/kademlia.rs")); + } } /// Peer action. #[derive(Debug, Clone)] #[allow(clippy::enum_variant_names)] enum PeerAction { - /// Find nodes (and values/providers) as part of `FIND_NODE`/`GET_VALUE`/`GET_PROVIDERS` query. - // TODO: may be a better naming would be `SendFindRequest`? - SendFindNode(QueryId), + /// Find nodes (and values/providers) as part of `FIND_NODE`/`GET_VALUE`/`GET_PROVIDERS` query. + // TODO: may be a better naming would be `SendFindRequest`? + SendFindNode(QueryId), - /// Send `PUT_VALUE` message to peer. - SendPutValue(QueryId, Bytes), + /// Send `PUT_VALUE` message to peer. + SendPutValue(QueryId, Bytes), - /// Send `ADD_PROVIDER` message to peer. - SendAddProvider(QueryId, Bytes), + /// Send `ADD_PROVIDER` message to peer. + SendAddProvider(QueryId, Bytes), } impl PeerAction { - fn query_id(&self) -> QueryId { - match self { - PeerAction::SendFindNode(query_id) => *query_id, - PeerAction::SendPutValue(query_id, _) => *query_id, - PeerAction::SendAddProvider(query_id, _) => *query_id, - } - } + fn query_id(&self) -> QueryId { + match self { + PeerAction::SendFindNode(query_id) => *query_id, + PeerAction::SendPutValue(query_id, _) => *query_id, + PeerAction::SendAddProvider(query_id, _) => *query_id, + } + } } /// Peer context. #[derive(Default)] struct PeerContext { - /// Pending action, if any. - pending_actions: HashMap, + /// Pending action, if any. + pending_actions: HashMap, } impl PeerContext { - /// Create new [`PeerContext`]. - pub fn new() -> Self { - Self { - pending_actions: HashMap::new(), - } - } - - /// Add pending action for peer. - pub fn add_pending_action(&mut self, substream_id: SubstreamId, action: PeerAction) { - self.pending_actions.insert(substream_id, action); - } + /// Create new [`PeerContext`]. + pub fn new() -> Self { + Self { pending_actions: HashMap::new() } + } + + /// Add pending action for peer. + pub fn add_pending_action(&mut self, substream_id: SubstreamId, action: PeerAction) { + self.pending_actions.insert(substream_id, action); + } } /// Main Kademlia object. pub(crate) struct Kademlia { - /// Transport service. - service: TransportService, + /// Transport service. + service: TransportService, - /// Local Kademlia key. - local_key: Key, + /// Local Kademlia key. + local_key: Key, - /// Connected peers, - peers: HashMap, + /// Connected peers, + peers: HashMap, - /// TX channel for sending events to `KademliaHandle`. - event_tx: Sender, + /// TX channel for sending events to `KademliaHandle`. + event_tx: Sender, - /// RX channel for receiving commands from `KademliaHandle`. - cmd_rx: Receiver, + /// RX channel for receiving commands from `KademliaHandle`. + cmd_rx: Receiver, - /// Next query ID. - next_query_id: Arc, + /// Next query ID. + next_query_id: Arc, - /// Routing table. - routing_table: RoutingTable, + /// Routing table. + routing_table: RoutingTable, - /// Replication factor. - replication_factor: usize, + /// Replication factor. + replication_factor: usize, - /// Record store. - store: MemoryStore, + /// Record store. + store: MemoryStore, - /// Pending outbound substreams. - pending_substreams: HashMap, + /// Pending outbound substreams. + pending_substreams: HashMap, - /// Pending dials. - pending_dials: HashMap>, + /// Pending dials. + pending_dials: HashMap>, - /// Routing table update mode. - update_mode: RoutingTableUpdateMode, + /// Routing table update mode. + update_mode: RoutingTableUpdateMode, - /// Incoming records validation mode. - validation_mode: IncomingRecordValidationMode, + /// Incoming records validation mode. + validation_mode: IncomingRecordValidationMode, - /// Default record TTL. - record_ttl: Duration, + /// Default record TTL. + record_ttl: Duration, - /// Query engine. - engine: QueryEngine, + /// Query engine. + engine: QueryEngine, - /// Query executor. - executor: QueryExecutor, + /// Query executor. + executor: QueryExecutor, } impl Kademlia { - /// Create new [`Kademlia`]. - pub(crate) fn new(mut service: TransportService, config: Config) -> Self { - let local_peer_id = service.local_peer_id(); - let local_key = Key::from(service.local_peer_id()); - let mut routing_table = RoutingTable::new(local_key.clone()); - - for (peer, addresses) in config.known_peers { - tracing::trace!(target: LOG_TARGET, ?peer, ?addresses, "add bootstrap peer"); - - routing_table.add_known_peer(peer, addresses.clone(), ConnectionType::NotConnected); - service.add_known_address(&peer, addresses.into_iter()); - } - - let store = MemoryStore::with_config(local_peer_id, config.memory_store_config); - - Self { - service, - routing_table, - peers: HashMap::new(), - cmd_rx: config.cmd_rx, - next_query_id: config.next_query_id, - store, - event_tx: config.event_tx, - local_key, - pending_dials: HashMap::new(), - executor: QueryExecutor::new(), - pending_substreams: HashMap::new(), - update_mode: config.update_mode, - validation_mode: config.validation_mode, - record_ttl: config.record_ttl, - replication_factor: config.replication_factor, - engine: QueryEngine::new(local_peer_id, config.replication_factor, PARALLELISM_FACTOR), - } - } - - /// Allocate next query ID. - fn next_query_id(&mut self) -> QueryId { - let query_id = self.next_query_id.fetch_add(1, Ordering::Relaxed); - - QueryId(query_id) - } - - /// Connection established to remote peer. - fn on_connection_established(&mut self, peer: PeerId, endpoint: Endpoint) -> crate::Result<()> { - tracing::trace!(target: LOG_TARGET, ?peer, "connection established"); - - match self.peers.entry(peer) { - Entry::Vacant(entry) => { - // Set the conenction type to connected and potentially save the address in the - // table. - // - // Note: this happens regardless of the state of the kademlia managed peers, because - // an already occupied entry in the `self.peers` map does not mean that we are - // no longer interested in the address / connection type of the peer. - self.routing_table.on_connection_established(Key::from(peer), endpoint); - - let Some(actions) = self.pending_dials.remove(&peer) else { - // Note that we do not add peer entry if we don't have any pending actions. - // This is done to not populate `self.peers` with peers that don't support - // our Kademlia protocol. - return Ok(()); - }; - - // go over all pending actions, open substreams and save the state to `PeerContext` - // from which it will be later queried when the substream opens - let mut context = PeerContext::new(); - - for action in actions { - match self.service.open_substream(peer) { - Ok(substream_id) => { - context.add_pending_action(substream_id, action); - } - Err(error) => { - tracing::debug!( - target: LOG_TARGET, - ?peer, - ?action, - ?error, - "connection established to peer but failed to open substream", - ); - - if let PeerAction::SendFindNode(query_id) = action { - self.engine.register_send_failure(query_id, peer); - self.engine.register_response_failure(query_id, peer); - } - } - } - } - - entry.insert(context); - Ok(()) - } - Entry::Occupied(_) => { - tracing::warn!( - target: LOG_TARGET, - ?peer, - ?endpoint, - "connection already exists, discarding opening substreams, this is unexpected" - ); - - // Update the connection in the routing table, similar as above. The function call - // happens in two places to avoid unnecessary cloning of the endpoint for logging - // purposes. - self.routing_table.on_connection_established(Key::from(peer), endpoint); - - Err(Error::PeerAlreadyExists(peer)) - } - } - } - - /// Disconnect peer from `Kademlia`. - /// - /// Peer is disconnected either because the substream was detected closed - /// or because the connection was closed. - /// - /// The peer is kept in the routing table but its connection state is set - /// as `NotConnected`, meaning it can be evicted from a k-bucket if another - /// peer that shares the bucket connects. - async fn disconnect_peer(&mut self, peer: PeerId, query: Option) { - tracing::trace!(target: LOG_TARGET, ?peer, ?query, "disconnect peer"); - - if let Some(query) = query { - self.engine.register_peer_failure(query, peer); - } - - // Apart from the failing query, we need to fail all other pending queries for the peer - // being disconnected. - if let Some(PeerContext { pending_actions }) = self.peers.remove(&peer) { - pending_actions.into_iter().for_each(|(_, action)| { - // Don't report failure twice for the same `query_id` if it was already reported - // above. (We can still have other pending queries for the peer that - // need to be reported.) - let query_id = action.query_id(); - if Some(query_id) != query { - self.engine.register_peer_failure(query_id, peer); - } - }); - } - - if let KBucketEntry::Occupied(entry) = self.routing_table.entry(Key::from(peer)) { - entry.connection = ConnectionType::NotConnected; - } - } - - /// Local node opened a substream to remote node. - async fn on_outbound_substream( - &mut self, - peer: PeerId, - substream_id: SubstreamId, - substream: Substream, - ) -> crate::Result<()> { - tracing::trace!( - target: LOG_TARGET, - ?peer, - ?substream_id, - "outbound substream opened", - ); - let _ = self.pending_substreams.remove(&substream_id); - - let pending_action = &mut self - .peers - .get_mut(&peer) - // If we opened an outbound substream, we must have pending actions for the peer. - .ok_or(Error::PeerDoesntExist(peer))? - .pending_actions - .remove(&substream_id); - - match pending_action.take() { - None => { - tracing::trace!( - target: LOG_TARGET, - ?peer, - ?substream_id, - "pending action doesn't exist for peer, closing substream", - ); - - let _ = substream.close().await; - return Ok(()); - } - Some(PeerAction::SendFindNode(query)) => { - match self.engine.next_peer_action(&query, &peer) { - Some(QueryAction::SendMessage { - query, - peer, - message, - }) => { - tracing::trace!(target: LOG_TARGET, ?peer, ?query, "start sending message to peer"); - - self.executor.send_request_read_response( - peer, - Some(query), - message, - substream, - ); - } - // query finished while the substream was being opened - None => { - let _ = substream.close().await; - } - action => { - tracing::warn!(target: LOG_TARGET, ?query, ?peer, ?action, "unexpected action for `FIND_NODE`"); - let _ = substream.close().await; - debug_assert!(false); - } - } - } - Some(PeerAction::SendPutValue(query, message)) => { - tracing::trace!(target: LOG_TARGET, ?peer, "send `PUT_VALUE` message"); - - self.executor.send_request_eat_response_failure( - peer, - Some(query), - message, - substream, - ); - // TODO: replace this with `send_request_read_response` as part of - // https://github.com/paritytech/litep2p/issues/429. - } - Some(PeerAction::SendAddProvider(query, message)) => { - tracing::trace!(target: LOG_TARGET, ?peer, "send `ADD_PROVIDER` message"); - - self.executor.send_message(peer, Some(query), message, substream); - } - } - - Ok(()) - } - - /// Remote opened a substream to local node. - async fn on_inbound_substream(&mut self, peer: PeerId, substream: Substream) { - tracing::trace!(target: LOG_TARGET, ?peer, "inbound substream opened"); - - // Ensure peer entry exists to treat peer as [`ConnectionType::Connected`]. - // when inserting into the routing table. - self.peers.entry(peer).or_default(); - - self.executor.read_message(peer, None, substream); - } - - /// Update routing table if the routing table update mode was set to automatic. - /// - /// Inform user about the potential routing table, allowing them to update it manually if - /// the mode was set to manual. - async fn update_routing_table(&mut self, peers: &[KademliaPeer]) { - let peers: Vec<_> = - peers.iter().filter(|peer| peer.peer != self.service.local_peer_id()).collect(); - - // inform user about the routing table update, regardless of what the routing table update - // mode is - let _ = self - .event_tx - .send(KademliaEvent::RoutingTableUpdate { - peers: peers.iter().map(|peer| peer.peer).collect::>(), - }) - .await; - - for info in peers { - let addresses = info.addresses(); - self.service.add_known_address(&info.peer, addresses.clone().into_iter()); - - if std::matches!(self.update_mode, RoutingTableUpdateMode::Automatic) { - self.routing_table.add_known_peer( - info.peer, - addresses, - self.peers - .get(&info.peer) - .map_or(ConnectionType::NotConnected, |_| ConnectionType::Connected), - ); - } - } - } - - /// Handle received message. - async fn on_message_received( - &mut self, - peer: PeerId, - query_id: Option, - message: BytesMut, - substream: Substream, - ) -> crate::Result<()> { - tracing::trace!(target: LOG_TARGET, ?peer, query = ?query_id, "handle message from peer"); - - match KademliaMessage::from_bytes(message, self.replication_factor) - .ok_or(Error::InvalidData)? - { - KademliaMessage::FindNode { target, peers } => { - match query_id { - Some(query_id) => { - tracing::trace!( - target: LOG_TARGET, - ?peer, - ?target, - query = ?query_id, - "handle `FIND_NODE` response", - ); - - // update routing table and inform user about the update - self.update_routing_table(&peers).await; - self.engine.register_response( - query_id, - peer, - KademliaMessage::FindNode { target, peers }, - ); - substream.close().await; - } - None => { - tracing::trace!( - target: LOG_TARGET, - ?peer, - ?target, - "handle `FIND_NODE` request", - ); - - let message = KademliaMessage::find_node_response( - &target, - self.routing_table - .closest(&Key::new(target.as_ref()), self.replication_factor), - ); - self.executor.send_message(peer, None, message.into(), substream); - } - } - } - KademliaMessage::PutValue { record } => match query_id { - Some(query_id) => { - tracing::trace!( - target: LOG_TARGET, - ?peer, - query = ?query_id, - record_key = ?record.key, - "handle `PUT_VALUE` response", - ); - - self.engine.register_response( - query_id, - peer, - KademliaMessage::PutValue { record }, - ); - substream.close().await; - } - None => { - tracing::trace!( - target: LOG_TARGET, - ?peer, - record_key = ?record.key, - "handle `PUT_VALUE` request", - ); - - if let IncomingRecordValidationMode::Automatic = self.validation_mode { - self.store.put(record.clone()); - } - - // Send ACK even if the record was/will be filtered out to not reveal any - // internal state. - let message = KademliaMessage::put_value_response( - record.key.clone(), - record.value.clone(), - ); - self.executor.send_message_eat_failure(peer, None, message, substream); - // TODO: replace this with `send_message` as part of - // https://github.com/paritytech/litep2p/issues/429. - - let _ = self.event_tx.send(KademliaEvent::IncomingRecord { record }).await; - } - }, - KademliaMessage::GetRecord { key, record, peers } => { - match (query_id, key) { - (Some(query_id), key) => { - tracing::trace!( - target: LOG_TARGET, - ?peer, - query = ?query_id, - ?peers, - ?record, - "handle `GET_VALUE` response", - ); - - // update routing table and inform user about the update - self.update_routing_table(&peers).await; - - self.engine.register_response( - query_id, - peer, - KademliaMessage::GetRecord { key, record, peers }, - ); - - substream.close().await; - } - (None, Some(key)) => { - tracing::trace!( - target: LOG_TARGET, - ?peer, - ?key, - "handle `GET_VALUE` request", - ); - - let value = self.store.get(&key).cloned(); - let closest_peers = self - .routing_table - .closest(&Key::new(key.as_ref()), self.replication_factor); - - let message = - KademliaMessage::get_value_response(key, closest_peers, value); - self.executor.send_message(peer, None, message.into(), substream); - } - (None, None) => tracing::debug!( - target: LOG_TARGET, - ?peer, - ?record, - ?peers, - "unable to handle `GET_RECORD` request with empty key", - ), - } - } - KademliaMessage::AddProvider { key, mut providers } => { - tracing::trace!( - target: LOG_TARGET, - ?peer, - ?key, - ?providers, - "handle `ADD_PROVIDER` message", - ); - - match (providers.len(), providers.pop()) { - (1, Some(provider)) => { - let addresses = provider.addresses(); - - if provider.peer == peer { - self.store.put_provider( - key.clone(), - ContentProvider { - peer, - addresses: addresses.clone(), - }, - ); - - let _ = self - .event_tx - .send(KademliaEvent::IncomingProvider { - provided_key: key, - provider: ContentProvider { - peer: provider.peer, - addresses, - }, - }) - .await; - } else { - tracing::trace!( - target: LOG_TARGET, - publisher = ?peer, - provider = ?provider.peer, - "ignoring `ADD_PROVIDER` message with `publisher` != `provider`" - ) - } - } - (n, _) => { - tracing::trace!( - target: LOG_TARGET, - publisher = ?peer, - ?n, - "ignoring `ADD_PROVIDER` message with `n` != 1 providers" - ) - } - } - } - KademliaMessage::GetProviders { - key, - peers, - providers, - } => { - match (query_id, key) { - (Some(query_id), key) => { - // Note: key is not required, but can be non-empty. We just ignore it here. - tracing::trace!( - target: LOG_TARGET, - ?peer, - query = ?query_id, - ?key, - ?peers, - ?providers, - "handle `GET_PROVIDERS` response", - ); - - // update routing table and inform user about the update - self.update_routing_table(&peers).await; - - self.engine.register_response( - query_id, - peer, - KademliaMessage::GetProviders { - key, - peers, - providers, - }, - ); - - substream.close().await; - } - (None, Some(key)) => { - tracing::trace!( - target: LOG_TARGET, - ?peer, - ?key, - "handle `GET_PROVIDERS` request", - ); - - let mut providers = self.store.get_providers(&key); - - // Make sure local provider addresses are up to date. - let local_peer_id = self.local_key.clone().into_preimage(); - if let Some(p) = - providers.iter_mut().find(|p| p.peer == local_peer_id).as_mut() - { - p.addresses = self.service.public_addresses().get_addresses(); - } - - let closer_peers = self - .routing_table - .closest(&Key::new(key.as_ref()), self.replication_factor); - - let message = - KademliaMessage::get_providers_response(providers, &closer_peers); - self.executor.send_message(peer, None, message.into(), substream); - } - (None, None) => tracing::debug!( - target: LOG_TARGET, - ?peer, - ?peers, - ?providers, - "unable to handle `GET_PROVIDERS` request with empty key", - ), - } - } - } - - Ok(()) - } - - /// Failed to open substream to remote peer. - async fn on_substream_open_failure( - &mut self, - substream_id: SubstreamId, - error: SubstreamError, - ) { - tracing::trace!( - target: LOG_TARGET, - ?substream_id, - ?error, - "failed to open substream" - ); - - let Some(peer) = self.pending_substreams.remove(&substream_id) else { - tracing::debug!( - target: LOG_TARGET, - ?substream_id, - "outbound substream failed for non-existent peer" - ); - return; - }; - - if let Some(context) = self.peers.get_mut(&peer) { - let query = - context.pending_actions.remove(&substream_id).as_ref().map(PeerAction::query_id); - - self.disconnect_peer(peer, query).await; - } - } - - /// Handle dial failure. - fn on_dial_failure(&mut self, peer: PeerId, addresses: Vec) { - tracing::trace!(target: LOG_TARGET, ?peer, ?addresses, "failed to dial peer"); - - self.routing_table.on_dial_failure(Key::from(peer), &addresses); - - let Some(actions) = self.pending_dials.remove(&peer) else { - return; - }; - - for action in actions { - let query = action.query_id(); - - tracing::trace!( - target: LOG_TARGET, - ?peer, - ?query, - ?addresses, - "report failure for pending query", - ); - - // Fail both sending and receiving due to dial failure. - self.engine.register_send_failure(query, peer); - self.engine.register_response_failure(query, peer); - } - } - - /// Open a substream with a peer or dial the peer. - fn open_substream_or_dial( - &mut self, - peer: PeerId, - action: PeerAction, - query: Option, - ) -> Result<(), Error> { - match self.service.open_substream(peer) { - Ok(substream_id) => { - self.pending_substreams.insert(substream_id, peer); - self.peers.entry(peer).or_default().pending_actions.insert(substream_id, action); - - Ok(()) - } - Err(err) => { - tracing::trace!(target: LOG_TARGET, ?query, ?peer, ?err, "Failed to open substream. Dialing peer"); - - match self.service.dial(&peer) { - Ok(()) => { - self.pending_dials.entry(peer).or_default().push(action); - Ok(()) - } - - // Already connected is a recoverable error. - Err(ImmediateDialError::AlreadyConnected) => { - // Dial returned `Error::AlreadyConnected`, retry opening the substream. - match self.service.open_substream(peer) { - Ok(substream_id) => { - self.pending_substreams.insert(substream_id, peer); - self.peers - .entry(peer) - .or_default() - .pending_actions - .insert(substream_id, action); - Ok(()) - } - Err(err) => { - tracing::debug!(target: LOG_TARGET, ?query, ?peer, ?err, "Failed to open substream a second time"); - Err(err.into()) - } - } - } - - Err(error) => { - tracing::trace!(target: LOG_TARGET, ?query, ?peer, ?error, "Failed to dial peer"); - Err(error.into()) - } - } - } - } - } - - /// Handle next query action. - async fn on_query_action(&mut self, action: QueryAction) -> Result<(), (QueryId, PeerId)> { - match action { - QueryAction::SendMessage { query, peer, .. } => { - // This action is used for `FIND_NODE`, `GET_VALUE` and `GET_PROVIDERS` queries. - if self - .open_substream_or_dial(peer, PeerAction::SendFindNode(query), Some(query)) - .is_err() - { - // Announce the error to the query engine. - self.engine.register_send_failure(query, peer); - self.engine.register_response_failure(query, peer); - } - Ok(()) - } - QueryAction::FindNodeQuerySucceeded { - target, - peers, - query, - } => { - tracing::debug!( - target: LOG_TARGET, - ?query, - peer = ?target, - num_peers = ?peers.len(), - "`FIND_NODE` succeeded", - ); - - let _ = self - .event_tx - .send(KademliaEvent::FindNodeSuccess { - target, - query_id: query, - peers: peers - .into_iter() - .map(|info| (info.peer, info.addresses())) - .collect(), - }) - .await; - Ok(()) - } - QueryAction::PutRecordToFoundNodes { - query, - record, - peers, - quorum, - } => { - tracing::trace!( - target: LOG_TARGET, - ?query, - record_key = ?record.key, - num_peers = ?peers.len(), - "store record to found peers", - ); - let key = record.key.clone(); - let message: Bytes = KademliaMessage::put_value(record); - - for peer in &peers { - if let Err(error) = self.open_substream_or_dial( - peer.peer, - // `message` is cheaply clonable because of `Bytes` reference counting. - PeerAction::SendPutValue(query, message.clone()), - None, - ) { - tracing::debug!( - target: LOG_TARGET, - ?peer, - ?key, - ?error, - "failed to put record to peer", - ); - } - } - - self.engine.start_put_record_to_found_nodes_requests_tracking( - query, - key, - peers.into_iter().map(|peer| peer.peer).collect(), - quorum, - ); - - Ok(()) - } - QueryAction::PutRecordQuerySucceeded { query, key } => { - tracing::debug!(target: LOG_TARGET, ?query, "`PUT_VALUE` query succeeded"); - - let _ = self - .event_tx - .send(KademliaEvent::PutRecordSuccess { - query_id: query, - key, - }) - .await; - Ok(()) - } - QueryAction::AddProviderToFoundNodes { - query, - provided_key, - provider, - peers, - quorum, - } => { - tracing::trace!( - target: LOG_TARGET, - ?provided_key, - num_peers = ?peers.len(), - "add provider record to found peers", - ); - - let message = KademliaMessage::add_provider(provided_key.clone(), provider); - - for peer in &peers { - if let Err(error) = self.open_substream_or_dial( - peer.peer, - PeerAction::SendAddProvider(query, message.clone()), - None, - ) { - tracing::debug!( - target: LOG_TARGET, - ?peer, - ?provided_key, - ?error, - "failed to add provider record to peer", - ) - } - } - - self.engine.start_add_provider_to_found_nodes_requests_tracking( - query, - provided_key, - peers.into_iter().map(|peer| peer.peer).collect(), - quorum, - ); - - Ok(()) - } - QueryAction::AddProviderQuerySucceeded { - query, - provided_key, - } => { - tracing::debug!(target: LOG_TARGET, ?query, "`ADD_PROVIDER` query succeeded"); - - let _ = self - .event_tx - .send(KademliaEvent::AddProviderSuccess { - query_id: query, - provided_key, - }) - .await; - Ok(()) - } - QueryAction::GetRecordQueryDone { query_id } => { - let _ = self.event_tx.send(KademliaEvent::GetRecordSuccess { query_id }).await; - Ok(()) - } - QueryAction::GetProvidersQueryDone { - query_id, - provided_key, - providers, - } => { - let _ = self - .event_tx - .send(KademliaEvent::GetProvidersSuccess { - query_id, - provided_key, - providers, - }) - .await; - Ok(()) - } - QueryAction::QueryFailed { query } => { - tracing::debug!(target: LOG_TARGET, ?query, "query failed"); - - let _ = self.event_tx.send(KademliaEvent::QueryFailed { query_id: query }).await; - Ok(()) - } - QueryAction::GetRecordPartialResult { query_id, record } => { - let _ = self - .event_tx - .send(KademliaEvent::GetRecordPartialResult { query_id, record }) - .await; - Ok(()) - } - QueryAction::QuerySucceeded { .. } => Ok(()), - } - } - - /// [`Kademlia`] event loop. - pub async fn run(mut self) -> crate::Result<()> { - tracing::debug!(target: LOG_TARGET, "starting kademlia event loop"); - - loop { - // poll `QueryEngine` for next actions. - while let Some(action) = self.engine.next_action() { - if let Err((query, peer)) = self.on_query_action(action).await { - self.disconnect_peer(peer, Some(query)).await; - } - } - - tokio::select! { - event = self.service.next() => match event { - Some(TransportEvent::ConnectionEstablished { peer, endpoint }) => { - if let Err(error) = self.on_connection_established(peer, endpoint) { - tracing::debug!( - target: LOG_TARGET, - ?error, - "failed to handle established connection", - ); - } - } - Some(TransportEvent::ConnectionClosed { peer }) => { - self.disconnect_peer(peer, None).await; - } - Some(TransportEvent::SubstreamOpened { peer, direction, substream, .. }) => { - match direction { - Direction::Inbound => self.on_inbound_substream(peer, substream).await, - Direction::Outbound(substream_id) => { - if let Err(error) = self - .on_outbound_substream(peer, substream_id, substream) - .await - { - tracing::debug!( - target: LOG_TARGET, - ?peer, - ?substream_id, - ?error, - "failed to handle outbound substream", - ); - } - } - } - }, - Some(TransportEvent::SubstreamOpenFailure { substream, error }) => { - self.on_substream_open_failure(substream, error).await; - } - Some(TransportEvent::DialFailure { peer, addresses }) => - self.on_dial_failure(peer, addresses), - None => return Err(Error::EssentialTaskClosed), - }, - context = self.executor.next() => { - let QueryContext { peer, query_id, result } = context.unwrap(); - - match result { - QueryResult::SendSuccess { substream } => { - tracing::trace!( - target: LOG_TARGET, - ?peer, - query = ?query_id, - "message sent to peer", - ); - let _ = substream.close().await; - - if let Some(query_id) = query_id { - self.engine.register_send_success(query_id, peer); - } - } - // This is a workaround to gracefully handle older litep2p nodes not - // sending/receiving `PUT_VALUE` ACKs. This should eventually be removed. - // TODO: remove this as part of - // https://github.com/paritytech/litep2p/issues/429. - QueryResult::AssumeSendSuccess => { - tracing::trace!( - target: LOG_TARGET, - ?peer, - query = ?query_id, - "treating message as sent to peer", - ); - - if let Some(query_id) = query_id { - self.engine.register_send_success(query_id, peer); - } - } - QueryResult::SendFailure { reason } => { - tracing::debug!( - target: LOG_TARGET, - ?peer, - query = ?query_id, - ?reason, - "failed to send message to peer", - ); - - self.disconnect_peer(peer, query_id).await; - } - QueryResult::ReadSuccess { substream, message } => { - tracing::trace!( - target: LOG_TARGET, - ?peer, - query = ?query_id, - "message read from peer", - ); - - if let Some(query_id) = query_id { - // Read success for locally originating requests implies send - // success. - self.engine.register_send_success(query_id, peer); - } - - if let Err(error) = self.on_message_received( - peer, - query_id, - message, - substream - ).await { - tracing::debug!( - target: LOG_TARGET, - ?peer, - ?error, - "failed to process message", - ); - } - } - QueryResult::ReadFailure { reason } => { - tracing::debug!( - target: LOG_TARGET, - ?peer, - query = ?query_id, - ?reason, - "failed to read message from substream", - ); - - self.disconnect_peer(peer, query_id).await; - } - } - }, - command = self.cmd_rx.recv() => { - match command { - Some(KademliaCommand::FindNode { peer, query_id }) => { - tracing::debug!( - target: LOG_TARGET, - ?peer, - query = ?query_id, - "starting `FIND_NODE` query", - ); - - self.engine.start_find_node( - query_id, - peer, - self.routing_table - .closest(&Key::from(peer), self.replication_factor) - .into() - ); - } - Some(KademliaCommand::PutRecord { mut record, quorum, query_id }) => { - tracing::debug!( - target: LOG_TARGET, - query = ?query_id, - key = ?record.key, - "store record to DHT", - ); - - // For `PUT_VALUE` requests originating locally we are always the - // publisher. - record.publisher = Some(self.local_key.clone().into_preimage()); - - // Make sure TTL is set. - record.expires = record - .expires - .or_else(|| Some(Instant::now() + self.record_ttl)); - - let key = Key::new(record.key.clone()); - - self.store.put(record.clone()); - - self.engine.start_put_record( - query_id, - record, - self.routing_table.closest(&key, self.replication_factor).into(), - quorum, - ); - } - Some(KademliaCommand::PutRecordToPeers { - mut record, - query_id, - peers, - update_local_store, - quorum, - }) => { - tracing::debug!( - target: LOG_TARGET, - query = ?query_id, - key = ?record.key, - "store record to DHT to specified peers", - ); - - // Make sure TTL is set. - record.expires = record - .expires - .or_else(|| Some(Instant::now() + self.record_ttl)); - - if update_local_store { - self.store.put(record.clone()); - } - - // Put the record to the specified peers. - let peers = peers.into_iter().filter_map(|peer| { - if peer == self.service.local_peer_id() { - return None; - } - - match self.routing_table.entry(Key::from(peer)) { - KBucketEntry::Occupied(entry) => Some(entry.clone()), - KBucketEntry::Vacant(entry) if !entry.address_store.is_empty() => - Some(entry.clone()), - _ => None, - } - }).collect(); - - self.engine.start_put_record_to_peers( - query_id, - record, - peers, - quorum, - ); - } - Some(KademliaCommand::StartProviding { - key, - quorum, - query_id - }) => { - tracing::debug!( - target: LOG_TARGET, - query = ?query_id, - ?key, - "register as a content provider", - ); - - let addresses = self.service.public_addresses().get_addresses(); - let provider = ContentProvider { - peer: self.service.local_peer_id(), - addresses, - }; - - self.store.put_local_provider(key.clone(), quorum); - - self.engine.start_add_provider( - query_id, - key.clone(), - provider, - self.routing_table - .closest(&Key::new(key), self.replication_factor) - .into(), - quorum, - ); - } - Some(KademliaCommand::StopProviding { - key, - }) => { - tracing::debug!( - target: LOG_TARGET, - ?key, - "stop providing", - ); - - self.store.remove_local_provider(key); - } - Some(KademliaCommand::GetRecord { key, quorum, query_id }) => { - tracing::debug!(target: LOG_TARGET, ?key, "get record from DHT"); - - match (self.store.get(&key), quorum) { - (Some(record), Quorum::One) => { - let _ = self - .event_tx - .send(KademliaEvent::GetRecordPartialResult { query_id, record: PeerRecord { - peer: self.service.local_peer_id(), - record: record.clone(), - } }) - .await; - - let _ = self - .event_tx - .send(KademliaEvent::GetRecordSuccess { - query_id, - }) - .await; - } - (record, _) => { - let local_record = record.is_some(); - if let Some(record) = record { - let _ = self - .event_tx - .send(KademliaEvent::GetRecordPartialResult { query_id, record: PeerRecord { - peer: self.service.local_peer_id(), - record: record.clone(), - } }) - .await; - } - - self.engine.start_get_record( - query_id, - key.clone(), - self.routing_table - .closest(&Key::new(key), self.replication_factor) - .into(), - quorum, - local_record, - ); - } - } - - } - Some(KademliaCommand::GetProviders { key, query_id }) => { - tracing::debug!(target: LOG_TARGET, ?key, "get providers from DHT"); - - let known_providers = self.store.get_providers(&key); - - self.engine.start_get_providers( - query_id, - key.clone(), - self.routing_table - .closest(&Key::new(key), self.replication_factor) - .into(), - known_providers, - ); - } - Some(KademliaCommand::AddKnownPeer { peer, addresses }) => { - tracing::trace!( - target: LOG_TARGET, - ?peer, - ?addresses, - "add known peer", - ); - - self.routing_table.add_known_peer( - peer, - addresses.clone(), - self.peers - .get(&peer) - .map_or( - ConnectionType::NotConnected, - |_| ConnectionType::Connected, - ), - ); - self.service.add_known_address(&peer, addresses.into_iter()); - - } - Some(KademliaCommand::StoreRecord { mut record }) => { - tracing::debug!( - target: LOG_TARGET, - key = ?record.key, - "store record in local store", - ); - - // Make sure TTL is set. - record.expires = - record.expires.or_else(|| Some(Instant::now() + self.record_ttl)); - - self.store.put(record); - } - None => return Err(Error::EssentialTaskClosed), - } - }, - action = self.store.next_action() => match action { - Some(MemoryStoreAction::RefreshProvider { provided_key, provider, quorum }) => { - tracing::trace!( - target: LOG_TARGET, - ?provided_key, - "republishing local provider", - ); - - self.store.put_local_provider(provided_key.clone(), quorum); - - // We never update local provider addresses in the store during refresh, - // as this is done anyway when replying to `GET_PROVIDERS` request. - - let query_id = self.next_query_id(); - self.engine.start_add_provider( - query_id, - provided_key.clone(), - provider, - self.routing_table - .closest(&Key::new(provided_key), self.replication_factor) - .into(), - quorum, - ); - } - None => {} - } - } - } - } + /// Create new [`Kademlia`]. + pub(crate) fn new(mut service: TransportService, config: Config) -> Self { + let local_peer_id = service.local_peer_id(); + let local_key = Key::from(service.local_peer_id()); + let mut routing_table = RoutingTable::new(local_key.clone()); + + for (peer, addresses) in config.known_peers { + tracing::trace!(target: LOG_TARGET, ?peer, ?addresses, "add bootstrap peer"); + + routing_table.add_known_peer(peer, addresses.clone(), ConnectionType::NotConnected); + service.add_known_address(&peer, addresses.into_iter()); + } + + let store = MemoryStore::with_config(local_peer_id, config.memory_store_config); + + Self { + service, + routing_table, + peers: HashMap::new(), + cmd_rx: config.cmd_rx, + next_query_id: config.next_query_id, + store, + event_tx: config.event_tx, + local_key, + pending_dials: HashMap::new(), + executor: QueryExecutor::new(), + pending_substreams: HashMap::new(), + update_mode: config.update_mode, + validation_mode: config.validation_mode, + record_ttl: config.record_ttl, + replication_factor: config.replication_factor, + engine: QueryEngine::new(local_peer_id, config.replication_factor, PARALLELISM_FACTOR), + } + } + + /// Allocate next query ID. + fn next_query_id(&mut self) -> QueryId { + let query_id = self.next_query_id.fetch_add(1, Ordering::Relaxed); + + QueryId(query_id) + } + + /// Connection established to remote peer. + fn on_connection_established(&mut self, peer: PeerId, endpoint: Endpoint) -> crate::Result<()> { + tracing::trace!(target: LOG_TARGET, ?peer, "connection established"); + + match self.peers.entry(peer) { + Entry::Vacant(entry) => { + // Set the conenction type to connected and potentially save the address in the + // table. + // + // Note: this happens regardless of the state of the kademlia managed peers, because + // an already occupied entry in the `self.peers` map does not mean that we are + // no longer interested in the address / connection type of the peer. + self.routing_table.on_connection_established(Key::from(peer), endpoint); + + let Some(actions) = self.pending_dials.remove(&peer) else { + // Note that we do not add peer entry if we don't have any pending actions. + // This is done to not populate `self.peers` with peers that don't support + // our Kademlia protocol. + return Ok(()); + }; + + // go over all pending actions, open substreams and save the state to `PeerContext` + // from which it will be later queried when the substream opens + let mut context = PeerContext::new(); + + for action in actions { + match self.service.open_substream(peer) { + Ok(substream_id) => { + context.add_pending_action(substream_id, action); + }, + Err(error) => { + tracing::debug!( + target: LOG_TARGET, + ?peer, + ?action, + ?error, + "connection established to peer but failed to open substream", + ); + + if let PeerAction::SendFindNode(query_id) = action { + self.engine.register_send_failure(query_id, peer); + self.engine.register_response_failure(query_id, peer); + } + }, + } + } + + entry.insert(context); + Ok(()) + }, + Entry::Occupied(_) => { + tracing::warn!( + target: LOG_TARGET, + ?peer, + ?endpoint, + "connection already exists, discarding opening substreams, this is unexpected" + ); + + // Update the connection in the routing table, similar as above. The function call + // happens in two places to avoid unnecessary cloning of the endpoint for logging + // purposes. + self.routing_table.on_connection_established(Key::from(peer), endpoint); + + Err(Error::PeerAlreadyExists(peer)) + }, + } + } + + /// Disconnect peer from `Kademlia`. + /// + /// Peer is disconnected either because the substream was detected closed + /// or because the connection was closed. + /// + /// The peer is kept in the routing table but its connection state is set + /// as `NotConnected`, meaning it can be evicted from a k-bucket if another + /// peer that shares the bucket connects. + async fn disconnect_peer(&mut self, peer: PeerId, query: Option) { + tracing::trace!(target: LOG_TARGET, ?peer, ?query, "disconnect peer"); + + if let Some(query) = query { + self.engine.register_peer_failure(query, peer); + } + + // Apart from the failing query, we need to fail all other pending queries for the peer + // being disconnected. + if let Some(PeerContext { pending_actions }) = self.peers.remove(&peer) { + pending_actions.into_iter().for_each(|(_, action)| { + // Don't report failure twice for the same `query_id` if it was already reported + // above. (We can still have other pending queries for the peer that + // need to be reported.) + let query_id = action.query_id(); + if Some(query_id) != query { + self.engine.register_peer_failure(query_id, peer); + } + }); + } + + if let KBucketEntry::Occupied(entry) = self.routing_table.entry(Key::from(peer)) { + entry.connection = ConnectionType::NotConnected; + } + } + + /// Local node opened a substream to remote node. + async fn on_outbound_substream( + &mut self, + peer: PeerId, + substream_id: SubstreamId, + substream: Substream, + ) -> crate::Result<()> { + tracing::trace!( + target: LOG_TARGET, + ?peer, + ?substream_id, + "outbound substream opened", + ); + let _ = self.pending_substreams.remove(&substream_id); + + let pending_action = &mut self + .peers + .get_mut(&peer) + // If we opened an outbound substream, we must have pending actions for the peer. + .ok_or(Error::PeerDoesntExist(peer))? + .pending_actions + .remove(&substream_id); + + match pending_action.take() { + None => { + tracing::trace!( + target: LOG_TARGET, + ?peer, + ?substream_id, + "pending action doesn't exist for peer, closing substream", + ); + + let _ = substream.close().await; + return Ok(()); + }, + Some(PeerAction::SendFindNode(query)) => { + match self.engine.next_peer_action(&query, &peer) { + Some(QueryAction::SendMessage { query, peer, message }) => { + tracing::trace!(target: LOG_TARGET, ?peer, ?query, "start sending message to peer"); + + self.executor.send_request_read_response( + peer, + Some(query), + message, + substream, + ); + }, + // query finished while the substream was being opened + None => { + let _ = substream.close().await; + }, + action => { + tracing::warn!(target: LOG_TARGET, ?query, ?peer, ?action, "unexpected action for `FIND_NODE`"); + let _ = substream.close().await; + debug_assert!(false); + }, + } + }, + Some(PeerAction::SendPutValue(query, message)) => { + tracing::trace!(target: LOG_TARGET, ?peer, "send `PUT_VALUE` message"); + + self.executor.send_request_eat_response_failure( + peer, + Some(query), + message, + substream, + ); + // TODO: replace this with `send_request_read_response` as part of + // https://github.com/paritytech/litep2p/issues/429. + }, + Some(PeerAction::SendAddProvider(query, message)) => { + tracing::trace!(target: LOG_TARGET, ?peer, "send `ADD_PROVIDER` message"); + + self.executor.send_message(peer, Some(query), message, substream); + }, + } + + Ok(()) + } + + /// Remote opened a substream to local node. + async fn on_inbound_substream(&mut self, peer: PeerId, substream: Substream) { + tracing::trace!(target: LOG_TARGET, ?peer, "inbound substream opened"); + + // Ensure peer entry exists to treat peer as [`ConnectionType::Connected`]. + // when inserting into the routing table. + self.peers.entry(peer).or_default(); + + self.executor.read_message(peer, None, substream); + } + + /// Update routing table if the routing table update mode was set to automatic. + /// + /// Inform user about the potential routing table, allowing them to update it manually if + /// the mode was set to manual. + async fn update_routing_table(&mut self, peers: &[KademliaPeer]) { + let peers: Vec<_> = + peers.iter().filter(|peer| peer.peer != self.service.local_peer_id()).collect(); + + // inform user about the routing table update, regardless of what the routing table update + // mode is + let _ = self + .event_tx + .send(KademliaEvent::RoutingTableUpdate { + peers: peers.iter().map(|peer| peer.peer).collect::>(), + }) + .await; + + for info in peers { + let addresses = info.addresses(); + self.service.add_known_address(&info.peer, addresses.clone().into_iter()); + + if std::matches!(self.update_mode, RoutingTableUpdateMode::Automatic) { + self.routing_table.add_known_peer( + info.peer, + addresses, + self.peers + .get(&info.peer) + .map_or(ConnectionType::NotConnected, |_| ConnectionType::Connected), + ); + } + } + } + + /// Handle received message. + async fn on_message_received( + &mut self, + peer: PeerId, + query_id: Option, + message: BytesMut, + substream: Substream, + ) -> crate::Result<()> { + tracing::trace!(target: LOG_TARGET, ?peer, query = ?query_id, "handle message from peer"); + + match KademliaMessage::from_bytes(message, self.replication_factor) + .ok_or(Error::InvalidData)? + { + KademliaMessage::FindNode { target, peers } => { + match query_id { + Some(query_id) => { + tracing::trace!( + target: LOG_TARGET, + ?peer, + ?target, + query = ?query_id, + "handle `FIND_NODE` response", + ); + + // update routing table and inform user about the update + self.update_routing_table(&peers).await; + self.engine.register_response( + query_id, + peer, + KademliaMessage::FindNode { target, peers }, + ); + substream.close().await; + }, + None => { + tracing::trace!( + target: LOG_TARGET, + ?peer, + ?target, + "handle `FIND_NODE` request", + ); + + let message = KademliaMessage::find_node_response( + &target, + self.routing_table + .closest(&Key::new(target.as_ref()), self.replication_factor), + ); + self.executor.send_message(peer, None, message.into(), substream); + }, + } + }, + KademliaMessage::PutValue { record } => match query_id { + Some(query_id) => { + tracing::trace!( + target: LOG_TARGET, + ?peer, + query = ?query_id, + record_key = ?record.key, + "handle `PUT_VALUE` response", + ); + + self.engine.register_response( + query_id, + peer, + KademliaMessage::PutValue { record }, + ); + substream.close().await; + }, + None => { + tracing::trace!( + target: LOG_TARGET, + ?peer, + record_key = ?record.key, + "handle `PUT_VALUE` request", + ); + + if let IncomingRecordValidationMode::Automatic = self.validation_mode { + self.store.put(record.clone()); + } + + // Send ACK even if the record was/will be filtered out to not reveal any + // internal state. + let message = KademliaMessage::put_value_response( + record.key.clone(), + record.value.clone(), + ); + self.executor.send_message_eat_failure(peer, None, message, substream); + // TODO: replace this with `send_message` as part of + // https://github.com/paritytech/litep2p/issues/429. + + let _ = self.event_tx.send(KademliaEvent::IncomingRecord { record }).await; + }, + }, + KademliaMessage::GetRecord { key, record, peers } => { + match (query_id, key) { + (Some(query_id), key) => { + tracing::trace!( + target: LOG_TARGET, + ?peer, + query = ?query_id, + ?peers, + ?record, + "handle `GET_VALUE` response", + ); + + // update routing table and inform user about the update + self.update_routing_table(&peers).await; + + self.engine.register_response( + query_id, + peer, + KademliaMessage::GetRecord { key, record, peers }, + ); + + substream.close().await; + }, + (None, Some(key)) => { + tracing::trace!( + target: LOG_TARGET, + ?peer, + ?key, + "handle `GET_VALUE` request", + ); + + let value = self.store.get(&key).cloned(); + let closest_peers = self + .routing_table + .closest(&Key::new(key.as_ref()), self.replication_factor); + + let message = + KademliaMessage::get_value_response(key, closest_peers, value); + self.executor.send_message(peer, None, message.into(), substream); + }, + (None, None) => tracing::debug!( + target: LOG_TARGET, + ?peer, + ?record, + ?peers, + "unable to handle `GET_RECORD` request with empty key", + ), + } + }, + KademliaMessage::AddProvider { key, mut providers } => { + tracing::trace!( + target: LOG_TARGET, + ?peer, + ?key, + ?providers, + "handle `ADD_PROVIDER` message", + ); + + match (providers.len(), providers.pop()) { + (1, Some(provider)) => { + let addresses = provider.addresses(); + + if provider.peer == peer { + self.store.put_provider( + key.clone(), + ContentProvider { peer, addresses: addresses.clone() }, + ); + + let _ = self + .event_tx + .send(KademliaEvent::IncomingProvider { + provided_key: key, + provider: ContentProvider { peer: provider.peer, addresses }, + }) + .await; + } else { + tracing::trace!( + target: LOG_TARGET, + publisher = ?peer, + provider = ?provider.peer, + "ignoring `ADD_PROVIDER` message with `publisher` != `provider`" + ) + } + }, + (n, _) => { + tracing::trace!( + target: LOG_TARGET, + publisher = ?peer, + ?n, + "ignoring `ADD_PROVIDER` message with `n` != 1 providers" + ) + }, + } + }, + KademliaMessage::GetProviders { key, peers, providers } => { + match (query_id, key) { + (Some(query_id), key) => { + // Note: key is not required, but can be non-empty. We just ignore it here. + tracing::trace!( + target: LOG_TARGET, + ?peer, + query = ?query_id, + ?key, + ?peers, + ?providers, + "handle `GET_PROVIDERS` response", + ); + + // update routing table and inform user about the update + self.update_routing_table(&peers).await; + + self.engine.register_response( + query_id, + peer, + KademliaMessage::GetProviders { key, peers, providers }, + ); + + substream.close().await; + }, + (None, Some(key)) => { + tracing::trace!( + target: LOG_TARGET, + ?peer, + ?key, + "handle `GET_PROVIDERS` request", + ); + + let mut providers = self.store.get_providers(&key); + + // Make sure local provider addresses are up to date. + let local_peer_id = self.local_key.clone().into_preimage(); + if let Some(p) = + providers.iter_mut().find(|p| p.peer == local_peer_id).as_mut() + { + p.addresses = self.service.public_addresses().get_addresses(); + } + + let closer_peers = self + .routing_table + .closest(&Key::new(key.as_ref()), self.replication_factor); + + let message = + KademliaMessage::get_providers_response(providers, &closer_peers); + self.executor.send_message(peer, None, message.into(), substream); + }, + (None, None) => tracing::debug!( + target: LOG_TARGET, + ?peer, + ?peers, + ?providers, + "unable to handle `GET_PROVIDERS` request with empty key", + ), + } + }, + } + + Ok(()) + } + + /// Failed to open substream to remote peer. + async fn on_substream_open_failure( + &mut self, + substream_id: SubstreamId, + error: SubstreamError, + ) { + tracing::trace!( + target: LOG_TARGET, + ?substream_id, + ?error, + "failed to open substream" + ); + + let Some(peer) = self.pending_substreams.remove(&substream_id) else { + tracing::debug!( + target: LOG_TARGET, + ?substream_id, + "outbound substream failed for non-existent peer" + ); + return; + }; + + if let Some(context) = self.peers.get_mut(&peer) { + let query = + context.pending_actions.remove(&substream_id).as_ref().map(PeerAction::query_id); + + self.disconnect_peer(peer, query).await; + } + } + + /// Handle dial failure. + fn on_dial_failure(&mut self, peer: PeerId, addresses: Vec) { + tracing::trace!(target: LOG_TARGET, ?peer, ?addresses, "failed to dial peer"); + + self.routing_table.on_dial_failure(Key::from(peer), &addresses); + + let Some(actions) = self.pending_dials.remove(&peer) else { + return; + }; + + for action in actions { + let query = action.query_id(); + + tracing::trace!( + target: LOG_TARGET, + ?peer, + ?query, + ?addresses, + "report failure for pending query", + ); + + // Fail both sending and receiving due to dial failure. + self.engine.register_send_failure(query, peer); + self.engine.register_response_failure(query, peer); + } + } + + /// Open a substream with a peer or dial the peer. + fn open_substream_or_dial( + &mut self, + peer: PeerId, + action: PeerAction, + query: Option, + ) -> Result<(), Error> { + match self.service.open_substream(peer) { + Ok(substream_id) => { + self.pending_substreams.insert(substream_id, peer); + self.peers.entry(peer).or_default().pending_actions.insert(substream_id, action); + + Ok(()) + }, + Err(err) => { + tracing::trace!(target: LOG_TARGET, ?query, ?peer, ?err, "Failed to open substream. Dialing peer"); + + match self.service.dial(&peer) { + Ok(()) => { + self.pending_dials.entry(peer).or_default().push(action); + Ok(()) + }, + + // Already connected is a recoverable error. + Err(ImmediateDialError::AlreadyConnected) => { + // Dial returned `Error::AlreadyConnected`, retry opening the substream. + match self.service.open_substream(peer) { + Ok(substream_id) => { + self.pending_substreams.insert(substream_id, peer); + self.peers + .entry(peer) + .or_default() + .pending_actions + .insert(substream_id, action); + Ok(()) + }, + Err(err) => { + tracing::debug!(target: LOG_TARGET, ?query, ?peer, ?err, "Failed to open substream a second time"); + Err(err.into()) + }, + } + }, + + Err(error) => { + tracing::trace!(target: LOG_TARGET, ?query, ?peer, ?error, "Failed to dial peer"); + Err(error.into()) + }, + } + }, + } + } + + /// Handle next query action. + async fn on_query_action(&mut self, action: QueryAction) -> Result<(), (QueryId, PeerId)> { + match action { + QueryAction::SendMessage { query, peer, .. } => { + // This action is used for `FIND_NODE`, `GET_VALUE` and `GET_PROVIDERS` queries. + if self + .open_substream_or_dial(peer, PeerAction::SendFindNode(query), Some(query)) + .is_err() + { + // Announce the error to the query engine. + self.engine.register_send_failure(query, peer); + self.engine.register_response_failure(query, peer); + } + Ok(()) + }, + QueryAction::FindNodeQuerySucceeded { target, peers, query } => { + tracing::debug!( + target: LOG_TARGET, + ?query, + peer = ?target, + num_peers = ?peers.len(), + "`FIND_NODE` succeeded", + ); + + let _ = self + .event_tx + .send(KademliaEvent::FindNodeSuccess { + target, + query_id: query, + peers: peers + .into_iter() + .map(|info| (info.peer, info.addresses())) + .collect(), + }) + .await; + Ok(()) + }, + QueryAction::PutRecordToFoundNodes { query, record, peers, quorum } => { + tracing::trace!( + target: LOG_TARGET, + ?query, + record_key = ?record.key, + num_peers = ?peers.len(), + "store record to found peers", + ); + let key = record.key.clone(); + let message: Bytes = KademliaMessage::put_value(record); + + for peer in &peers { + if let Err(error) = self.open_substream_or_dial( + peer.peer, + // `message` is cheaply clonable because of `Bytes` reference counting. + PeerAction::SendPutValue(query, message.clone()), + None, + ) { + tracing::debug!( + target: LOG_TARGET, + ?peer, + ?key, + ?error, + "failed to put record to peer", + ); + } + } + + self.engine.start_put_record_to_found_nodes_requests_tracking( + query, + key, + peers.into_iter().map(|peer| peer.peer).collect(), + quorum, + ); + + Ok(()) + }, + QueryAction::PutRecordQuerySucceeded { query, key } => { + tracing::debug!(target: LOG_TARGET, ?query, "`PUT_VALUE` query succeeded"); + + let _ = self + .event_tx + .send(KademliaEvent::PutRecordSuccess { query_id: query, key }) + .await; + Ok(()) + }, + QueryAction::AddProviderToFoundNodes { + query, + provided_key, + provider, + peers, + quorum, + } => { + tracing::trace!( + target: LOG_TARGET, + ?provided_key, + num_peers = ?peers.len(), + "add provider record to found peers", + ); + + let message = KademliaMessage::add_provider(provided_key.clone(), provider); + + for peer in &peers { + if let Err(error) = self.open_substream_or_dial( + peer.peer, + PeerAction::SendAddProvider(query, message.clone()), + None, + ) { + tracing::debug!( + target: LOG_TARGET, + ?peer, + ?provided_key, + ?error, + "failed to add provider record to peer", + ) + } + } + + self.engine.start_add_provider_to_found_nodes_requests_tracking( + query, + provided_key, + peers.into_iter().map(|peer| peer.peer).collect(), + quorum, + ); + + Ok(()) + }, + QueryAction::AddProviderQuerySucceeded { query, provided_key } => { + tracing::debug!(target: LOG_TARGET, ?query, "`ADD_PROVIDER` query succeeded"); + + let _ = self + .event_tx + .send(KademliaEvent::AddProviderSuccess { query_id: query, provided_key }) + .await; + Ok(()) + }, + QueryAction::GetRecordQueryDone { query_id } => { + let _ = self.event_tx.send(KademliaEvent::GetRecordSuccess { query_id }).await; + Ok(()) + }, + QueryAction::GetProvidersQueryDone { query_id, provided_key, providers } => { + let _ = self + .event_tx + .send(KademliaEvent::GetProvidersSuccess { query_id, provided_key, providers }) + .await; + Ok(()) + }, + QueryAction::QueryFailed { query } => { + tracing::debug!(target: LOG_TARGET, ?query, "query failed"); + + let _ = self.event_tx.send(KademliaEvent::QueryFailed { query_id: query }).await; + Ok(()) + }, + QueryAction::GetRecordPartialResult { query_id, record } => { + let _ = self + .event_tx + .send(KademliaEvent::GetRecordPartialResult { query_id, record }) + .await; + Ok(()) + }, + QueryAction::QuerySucceeded { .. } => Ok(()), + } + } + + /// [`Kademlia`] event loop. + pub async fn run(mut self) -> crate::Result<()> { + tracing::debug!(target: LOG_TARGET, "starting kademlia event loop"); + + loop { + // poll `QueryEngine` for next actions. + while let Some(action) = self.engine.next_action() { + if let Err((query, peer)) = self.on_query_action(action).await { + self.disconnect_peer(peer, Some(query)).await; + } + } + + tokio::select! { + event = self.service.next() => match event { + Some(TransportEvent::ConnectionEstablished { peer, endpoint }) => { + if let Err(error) = self.on_connection_established(peer, endpoint) { + tracing::debug!( + target: LOG_TARGET, + ?error, + "failed to handle established connection", + ); + } + } + Some(TransportEvent::ConnectionClosed { peer }) => { + self.disconnect_peer(peer, None).await; + } + Some(TransportEvent::SubstreamOpened { peer, direction, substream, .. }) => { + match direction { + Direction::Inbound => self.on_inbound_substream(peer, substream).await, + Direction::Outbound(substream_id) => { + if let Err(error) = self + .on_outbound_substream(peer, substream_id, substream) + .await + { + tracing::debug!( + target: LOG_TARGET, + ?peer, + ?substream_id, + ?error, + "failed to handle outbound substream", + ); + } + } + } + }, + Some(TransportEvent::SubstreamOpenFailure { substream, error }) => { + self.on_substream_open_failure(substream, error).await; + } + Some(TransportEvent::DialFailure { peer, addresses }) => + self.on_dial_failure(peer, addresses), + None => return Err(Error::EssentialTaskClosed), + }, + context = self.executor.next() => { + let QueryContext { peer, query_id, result } = context.unwrap(); + + match result { + QueryResult::SendSuccess { substream } => { + tracing::trace!( + target: LOG_TARGET, + ?peer, + query = ?query_id, + "message sent to peer", + ); + let _ = substream.close().await; + + if let Some(query_id) = query_id { + self.engine.register_send_success(query_id, peer); + } + } + // This is a workaround to gracefully handle older litep2p nodes not + // sending/receiving `PUT_VALUE` ACKs. This should eventually be removed. + // TODO: remove this as part of + // https://github.com/paritytech/litep2p/issues/429. + QueryResult::AssumeSendSuccess => { + tracing::trace!( + target: LOG_TARGET, + ?peer, + query = ?query_id, + "treating message as sent to peer", + ); + + if let Some(query_id) = query_id { + self.engine.register_send_success(query_id, peer); + } + } + QueryResult::SendFailure { reason } => { + tracing::debug!( + target: LOG_TARGET, + ?peer, + query = ?query_id, + ?reason, + "failed to send message to peer", + ); + + self.disconnect_peer(peer, query_id).await; + } + QueryResult::ReadSuccess { substream, message } => { + tracing::trace!( + target: LOG_TARGET, + ?peer, + query = ?query_id, + "message read from peer", + ); + + if let Some(query_id) = query_id { + // Read success for locally originating requests implies send + // success. + self.engine.register_send_success(query_id, peer); + } + + if let Err(error) = self.on_message_received( + peer, + query_id, + message, + substream + ).await { + tracing::debug!( + target: LOG_TARGET, + ?peer, + ?error, + "failed to process message", + ); + } + } + QueryResult::ReadFailure { reason } => { + tracing::debug!( + target: LOG_TARGET, + ?peer, + query = ?query_id, + ?reason, + "failed to read message from substream", + ); + + self.disconnect_peer(peer, query_id).await; + } + } + }, + command = self.cmd_rx.recv() => { + match command { + Some(KademliaCommand::FindNode { peer, query_id }) => { + tracing::debug!( + target: LOG_TARGET, + ?peer, + query = ?query_id, + "starting `FIND_NODE` query", + ); + + self.engine.start_find_node( + query_id, + peer, + self.routing_table + .closest(&Key::from(peer), self.replication_factor) + .into() + ); + } + Some(KademliaCommand::PutRecord { mut record, quorum, query_id }) => { + tracing::debug!( + target: LOG_TARGET, + query = ?query_id, + key = ?record.key, + "store record to DHT", + ); + + // For `PUT_VALUE` requests originating locally we are always the + // publisher. + record.publisher = Some(self.local_key.clone().into_preimage()); + + // Make sure TTL is set. + record.expires = record + .expires + .or_else(|| Some(Instant::now() + self.record_ttl)); + + let key = Key::new(record.key.clone()); + + self.store.put(record.clone()); + + self.engine.start_put_record( + query_id, + record, + self.routing_table.closest(&key, self.replication_factor).into(), + quorum, + ); + } + Some(KademliaCommand::PutRecordToPeers { + mut record, + query_id, + peers, + update_local_store, + quorum, + }) => { + tracing::debug!( + target: LOG_TARGET, + query = ?query_id, + key = ?record.key, + "store record to DHT to specified peers", + ); + + // Make sure TTL is set. + record.expires = record + .expires + .or_else(|| Some(Instant::now() + self.record_ttl)); + + if update_local_store { + self.store.put(record.clone()); + } + + // Put the record to the specified peers. + let peers = peers.into_iter().filter_map(|peer| { + if peer == self.service.local_peer_id() { + return None; + } + + match self.routing_table.entry(Key::from(peer)) { + KBucketEntry::Occupied(entry) => Some(entry.clone()), + KBucketEntry::Vacant(entry) if !entry.address_store.is_empty() => + Some(entry.clone()), + _ => None, + } + }).collect(); + + self.engine.start_put_record_to_peers( + query_id, + record, + peers, + quorum, + ); + } + Some(KademliaCommand::StartProviding { + key, + quorum, + query_id + }) => { + tracing::debug!( + target: LOG_TARGET, + query = ?query_id, + ?key, + "register as a content provider", + ); + + let addresses = self.service.public_addresses().get_addresses(); + let provider = ContentProvider { + peer: self.service.local_peer_id(), + addresses, + }; + + self.store.put_local_provider(key.clone(), quorum); + + self.engine.start_add_provider( + query_id, + key.clone(), + provider, + self.routing_table + .closest(&Key::new(key), self.replication_factor) + .into(), + quorum, + ); + } + Some(KademliaCommand::StopProviding { + key, + }) => { + tracing::debug!( + target: LOG_TARGET, + ?key, + "stop providing", + ); + + self.store.remove_local_provider(key); + } + Some(KademliaCommand::GetRecord { key, quorum, query_id }) => { + tracing::debug!(target: LOG_TARGET, ?key, "get record from DHT"); + + match (self.store.get(&key), quorum) { + (Some(record), Quorum::One) => { + let _ = self + .event_tx + .send(KademliaEvent::GetRecordPartialResult { query_id, record: PeerRecord { + peer: self.service.local_peer_id(), + record: record.clone(), + } }) + .await; + + let _ = self + .event_tx + .send(KademliaEvent::GetRecordSuccess { + query_id, + }) + .await; + } + (record, _) => { + let local_record = record.is_some(); + if let Some(record) = record { + let _ = self + .event_tx + .send(KademliaEvent::GetRecordPartialResult { query_id, record: PeerRecord { + peer: self.service.local_peer_id(), + record: record.clone(), + } }) + .await; + } + + self.engine.start_get_record( + query_id, + key.clone(), + self.routing_table + .closest(&Key::new(key), self.replication_factor) + .into(), + quorum, + local_record, + ); + } + } + + } + Some(KademliaCommand::GetProviders { key, query_id }) => { + tracing::debug!(target: LOG_TARGET, ?key, "get providers from DHT"); + + let known_providers = self.store.get_providers(&key); + + self.engine.start_get_providers( + query_id, + key.clone(), + self.routing_table + .closest(&Key::new(key), self.replication_factor) + .into(), + known_providers, + ); + } + Some(KademliaCommand::AddKnownPeer { peer, addresses }) => { + tracing::trace!( + target: LOG_TARGET, + ?peer, + ?addresses, + "add known peer", + ); + + self.routing_table.add_known_peer( + peer, + addresses.clone(), + self.peers + .get(&peer) + .map_or( + ConnectionType::NotConnected, + |_| ConnectionType::Connected, + ), + ); + self.service.add_known_address(&peer, addresses.into_iter()); + + } + Some(KademliaCommand::StoreRecord { mut record }) => { + tracing::debug!( + target: LOG_TARGET, + key = ?record.key, + "store record in local store", + ); + + // Make sure TTL is set. + record.expires = + record.expires.or_else(|| Some(Instant::now() + self.record_ttl)); + + self.store.put(record); + } + None => return Err(Error::EssentialTaskClosed), + } + }, + action = self.store.next_action() => match action { + Some(MemoryStoreAction::RefreshProvider { provided_key, provider, quorum }) => { + tracing::trace!( + target: LOG_TARGET, + ?provided_key, + "republishing local provider", + ); + + self.store.put_local_provider(provided_key.clone(), quorum); + + // We never update local provider addresses in the store during refresh, + // as this is done anyway when replying to `GET_PROVIDERS` request. + + let query_id = self.next_query_id(); + self.engine.start_add_provider( + query_id, + provided_key.clone(), + provider, + self.routing_table + .closest(&Key::new(provided_key), self.replication_factor) + .into(), + quorum, + ); + } + None => {} + } + } + } + } } #[cfg(test)] mod tests { - use super::*; - use crate::{ - codec::ProtocolCodec, - transport::{ - manager::{SubstreamKeepAlive, TransportManager, TransportManagerBuilder}, - KEEP_ALIVE_TIMEOUT, - }, - types::protocol::ProtocolName, - ConnectionId, - }; - use multiaddr::Protocol; - use multihash::Multihash; - use std::str::FromStr; - use tokio::sync::mpsc::channel; - - #[allow(unused)] - struct Context { - _cmd_tx: Sender, - event_rx: Receiver, - } - - fn make_kademlia() -> (Kademlia, Context, TransportManager) { - let manager = TransportManagerBuilder::new().build(); - - let peer = PeerId::random(); - let (transport_service, _tx) = TransportService::new( - peer, - ProtocolName::from("/kad/1"), - Vec::new(), - Default::default(), - manager.transport_manager_handle(), - KEEP_ALIVE_TIMEOUT, - SubstreamKeepAlive::Yes, - ); - let (event_tx, event_rx) = channel(64); - let (_cmd_tx, cmd_rx) = channel(64); - let next_query_id = Arc::new(AtomicUsize::new(0usize)); - - let config = Config { - protocol_names: vec![ProtocolName::from("/kad/1")], - known_peers: HashMap::new(), - codec: ProtocolCodec::UnsignedVarint(Some(70 * 1024)), - replication_factor: 20usize, - update_mode: RoutingTableUpdateMode::Automatic, - validation_mode: IncomingRecordValidationMode::Automatic, - record_ttl: Duration::from_secs(36 * 60 * 60), - memory_store_config: Default::default(), - event_tx, - cmd_rx, - next_query_id, - }; - - ( - Kademlia::new(transport_service, config), - Context { _cmd_tx, event_rx }, - manager, - ) - } - - #[tokio::test] - async fn check_get_records_update() { - let (mut kademlia, _context, _manager) = make_kademlia(); - - let key = RecordKey::from(vec![1, 2, 3]); - let records = vec![ - // 2 peers backing the same record. - PeerRecord { - peer: PeerId::random(), - record: Record::new(key.clone(), vec![0x1]), - }, - PeerRecord { - peer: PeerId::random(), - record: Record::new(key.clone(), vec![0x1]), - }, - // only 1 peer backing the record. - PeerRecord { - peer: PeerId::random(), - record: Record::new(key.clone(), vec![0x2]), - }, - ]; - - for record in records { - let action = QueryAction::GetRecordPartialResult { - query_id: QueryId(1), - record, - }; - assert!(kademlia.on_query_action(action).await.is_ok()); - } - - let query_id = QueryId(1); - let action = QueryAction::GetRecordQueryDone { query_id }; - assert!(kademlia.on_query_action(action).await.is_ok()); - - // Check the local storage should not get updated. - assert!(kademlia.store.get(&key).is_none()); - } - - #[tokio::test] - async fn check_get_records_update_with_expired_records() { - let (mut kademlia, _context, _manager) = make_kademlia(); - - let key = RecordKey::from(vec![1, 2, 3]); - let expired = std::time::Instant::now() - std::time::Duration::from_secs(10); - let records = vec![ - // 2 peers backing the same record, one record is expired. - PeerRecord { - peer: PeerId::random(), - record: Record { - key: key.clone(), - value: vec![0x1], - publisher: None, - expires: Some(expired), - }, - }, - PeerRecord { - peer: PeerId::random(), - record: Record::new(key.clone(), vec![0x1]), - }, - // 2 peer backing the record. - PeerRecord { - peer: PeerId::random(), - record: Record::new(key.clone(), vec![0x2]), - }, - PeerRecord { - peer: PeerId::random(), - record: Record::new(key.clone(), vec![0x2]), - }, - ]; - - for record in records { - let action = QueryAction::GetRecordPartialResult { - query_id: QueryId(1), - record, - }; - assert!(kademlia.on_query_action(action).await.is_ok()); - } - - kademlia - .on_query_action(QueryAction::GetRecordQueryDone { - query_id: QueryId(1), - }) - .await - .unwrap(); - - // Check the local storage should not get updated. - assert!(kademlia.store.get(&key).is_none()); - } - - #[tokio::test] - async fn check_address_store_routing_table_updates() { - let (mut kademlia, _context, _manager) = make_kademlia(); - - let peer = PeerId::random(); - let address_a = Multiaddr::from_str("/dns/domain1.com/tcp/30333").unwrap().with( - Protocol::P2p(Multihash::from_bytes(&peer.to_bytes()).unwrap()), - ); - let address_b = Multiaddr::from_str("/dns/domain1.com/tcp/30334").unwrap().with( - Protocol::P2p(Multihash::from_bytes(&peer.to_bytes()).unwrap()), - ); - let address_c = Multiaddr::from_str("/dns/domain1.com/tcp/30339").unwrap().with( - Protocol::P2p(Multihash::from_bytes(&peer.to_bytes()).unwrap()), - ); - - // Added only with address a. - kademlia.routing_table.add_known_peer( - peer, - vec![address_a.clone()], - ConnectionType::NotConnected, - ); - - // Check peer addresses. - match kademlia.routing_table.entry(Key::from(peer)) { - KBucketEntry::Occupied(entry) => { - assert_eq!(entry.addresses(), vec![address_a.clone()]); - } - _ => panic!("Peer not found in routing table"), - }; - - // Report successful connection with address b via dialer endpoint. - let _ = kademlia.on_connection_established( - peer, - Endpoint::Dialer { - address: address_b.clone(), - connection_id: ConnectionId::from(0), - }, - ); - - // Address B has a higher priority, as it was detected via the dialing mechanism of the - // transport manager, while address A is not dialed yet. - match kademlia.routing_table.entry(Key::from(peer)) { - KBucketEntry::Occupied(entry) => { - assert_eq!( - entry.addresses(), - vec![address_b.clone(), address_a.clone()] - ); - } - _ => panic!("Peer not found in routing table"), - }; - - // Report successful connection with a random address via listener endpoint. - let _ = kademlia.on_connection_established( - peer, - Endpoint::Listener { - address: address_c.clone(), - connection_id: ConnectionId::from(0), - }, - ); - // Address C was not added, as the peer has dialed us possibly on an ephemeral port. - match kademlia.routing_table.entry(Key::from(peer)) { - KBucketEntry::Occupied(entry) => { - assert_eq!( - entry.addresses(), - vec![address_b.clone(), address_a.clone()] - ); - } - _ => panic!("Peer not found in routing table"), - }; - - // Address B fails two times (which gives it a lower score than A) and - // makes it subject to removal. - kademlia.on_dial_failure(peer, vec![address_b.clone(), address_b.clone()]); - - match kademlia.routing_table.entry(Key::from(peer)) { - KBucketEntry::Occupied(entry) => { - assert_eq!( - entry.addresses(), - vec![address_a.clone(), address_b.clone()] - ); - } - _ => panic!("Peer not found in routing table"), - }; - } + use super::*; + use crate::{ + codec::ProtocolCodec, + transport::{ + manager::{SubstreamKeepAlive, TransportManager, TransportManagerBuilder}, + KEEP_ALIVE_TIMEOUT, + }, + types::protocol::ProtocolName, + ConnectionId, + }; + use multiaddr::Protocol; + use multihash::Multihash; + use std::str::FromStr; + use tokio::sync::mpsc::channel; + + #[allow(unused)] + struct Context { + _cmd_tx: Sender, + event_rx: Receiver, + } + + fn make_kademlia() -> (Kademlia, Context, TransportManager) { + let manager = TransportManagerBuilder::new().build(); + + let peer = PeerId::random(); + let (transport_service, _tx) = TransportService::new( + peer, + ProtocolName::from("/kad/1"), + Vec::new(), + Default::default(), + manager.transport_manager_handle(), + KEEP_ALIVE_TIMEOUT, + SubstreamKeepAlive::Yes, + ); + let (event_tx, event_rx) = channel(64); + let (_cmd_tx, cmd_rx) = channel(64); + let next_query_id = Arc::new(AtomicUsize::new(0usize)); + + let config = Config { + protocol_names: vec![ProtocolName::from("/kad/1")], + known_peers: HashMap::new(), + codec: ProtocolCodec::UnsignedVarint(Some(70 * 1024)), + replication_factor: 20usize, + update_mode: RoutingTableUpdateMode::Automatic, + validation_mode: IncomingRecordValidationMode::Automatic, + record_ttl: Duration::from_secs(36 * 60 * 60), + memory_store_config: Default::default(), + event_tx, + cmd_rx, + next_query_id, + }; + + (Kademlia::new(transport_service, config), Context { _cmd_tx, event_rx }, manager) + } + + #[tokio::test] + async fn check_get_records_update() { + let (mut kademlia, _context, _manager) = make_kademlia(); + + let key = RecordKey::from(vec![1, 2, 3]); + let records = vec![ + // 2 peers backing the same record. + PeerRecord { peer: PeerId::random(), record: Record::new(key.clone(), vec![0x1]) }, + PeerRecord { peer: PeerId::random(), record: Record::new(key.clone(), vec![0x1]) }, + // only 1 peer backing the record. + PeerRecord { peer: PeerId::random(), record: Record::new(key.clone(), vec![0x2]) }, + ]; + + for record in records { + let action = QueryAction::GetRecordPartialResult { query_id: QueryId(1), record }; + assert!(kademlia.on_query_action(action).await.is_ok()); + } + + let query_id = QueryId(1); + let action = QueryAction::GetRecordQueryDone { query_id }; + assert!(kademlia.on_query_action(action).await.is_ok()); + + // Check the local storage should not get updated. + assert!(kademlia.store.get(&key).is_none()); + } + + #[tokio::test] + async fn check_get_records_update_with_expired_records() { + let (mut kademlia, _context, _manager) = make_kademlia(); + + let key = RecordKey::from(vec![1, 2, 3]); + let expired = std::time::Instant::now() - std::time::Duration::from_secs(10); + let records = vec![ + // 2 peers backing the same record, one record is expired. + PeerRecord { + peer: PeerId::random(), + record: Record { + key: key.clone(), + value: vec![0x1], + publisher: None, + expires: Some(expired), + }, + }, + PeerRecord { peer: PeerId::random(), record: Record::new(key.clone(), vec![0x1]) }, + // 2 peer backing the record. + PeerRecord { peer: PeerId::random(), record: Record::new(key.clone(), vec![0x2]) }, + PeerRecord { peer: PeerId::random(), record: Record::new(key.clone(), vec![0x2]) }, + ]; + + for record in records { + let action = QueryAction::GetRecordPartialResult { query_id: QueryId(1), record }; + assert!(kademlia.on_query_action(action).await.is_ok()); + } + + kademlia + .on_query_action(QueryAction::GetRecordQueryDone { query_id: QueryId(1) }) + .await + .unwrap(); + + // Check the local storage should not get updated. + assert!(kademlia.store.get(&key).is_none()); + } + + #[tokio::test] + async fn check_address_store_routing_table_updates() { + let (mut kademlia, _context, _manager) = make_kademlia(); + + let peer = PeerId::random(); + let address_a = Multiaddr::from_str("/dns/domain1.com/tcp/30333") + .unwrap() + .with(Protocol::P2p(Multihash::from_bytes(&peer.to_bytes()).unwrap())); + let address_b = Multiaddr::from_str("/dns/domain1.com/tcp/30334") + .unwrap() + .with(Protocol::P2p(Multihash::from_bytes(&peer.to_bytes()).unwrap())); + let address_c = Multiaddr::from_str("/dns/domain1.com/tcp/30339") + .unwrap() + .with(Protocol::P2p(Multihash::from_bytes(&peer.to_bytes()).unwrap())); + + // Added only with address a. + kademlia.routing_table.add_known_peer( + peer, + vec![address_a.clone()], + ConnectionType::NotConnected, + ); + + // Check peer addresses. + match kademlia.routing_table.entry(Key::from(peer)) { + KBucketEntry::Occupied(entry) => { + assert_eq!(entry.addresses(), vec![address_a.clone()]); + }, + _ => panic!("Peer not found in routing table"), + }; + + // Report successful connection with address b via dialer endpoint. + let _ = kademlia.on_connection_established( + peer, + Endpoint::Dialer { address: address_b.clone(), connection_id: ConnectionId::from(0) }, + ); + + // Address B has a higher priority, as it was detected via the dialing mechanism of the + // transport manager, while address A is not dialed yet. + match kademlia.routing_table.entry(Key::from(peer)) { + KBucketEntry::Occupied(entry) => { + assert_eq!(entry.addresses(), vec![address_b.clone(), address_a.clone()]); + }, + _ => panic!("Peer not found in routing table"), + }; + + // Report successful connection with a random address via listener endpoint. + let _ = kademlia.on_connection_established( + peer, + Endpoint::Listener { address: address_c.clone(), connection_id: ConnectionId::from(0) }, + ); + // Address C was not added, as the peer has dialed us possibly on an ephemeral port. + match kademlia.routing_table.entry(Key::from(peer)) { + KBucketEntry::Occupied(entry) => { + assert_eq!(entry.addresses(), vec![address_b.clone(), address_a.clone()]); + }, + _ => panic!("Peer not found in routing table"), + }; + + // Address B fails two times (which gives it a lower score than A) and + // makes it subject to removal. + kademlia.on_dial_failure(peer, vec![address_b.clone(), address_b.clone()]); + + match kademlia.routing_table.entry(Key::from(peer)) { + KBucketEntry::Occupied(entry) => { + assert_eq!(entry.addresses(), vec![address_a.clone(), address_b.clone()]); + }, + _ => panic!("Peer not found in routing table"), + }; + } } diff --git a/client/litep2p/src/protocol/libp2p/kademlia/query/find_many_nodes.rs b/client/litep2p/src/protocol/libp2p/kademlia/query/find_many_nodes.rs index 4be51b0d..b2d5ca8e 100644 --- a/client/litep2p/src/protocol/libp2p/kademlia/query/find_many_nodes.rs +++ b/client/litep2p/src/protocol/libp2p/kademlia/query/find_many_nodes.rs @@ -19,52 +19,49 @@ // DEALINGS IN THE SOFTWARE. use crate::{ - protocol::libp2p::kademlia::{ - query::{QueryAction, QueryId}, - types::KademliaPeer, - }, - PeerId, + protocol::libp2p::kademlia::{ + query::{QueryAction, QueryId}, + types::KademliaPeer, + }, + PeerId, }; /// Context for multiple `FIND_NODE` queries. // TODO: https://github.com/paritytech/litep2p/issues/80 implement finding nodes not present in the routing table. #[derive(Debug)] pub struct FindManyNodesContext { - /// Query ID. - pub query: QueryId, + /// Query ID. + pub query: QueryId, - /// The peers we are looking for. - pub peers_to_report: Vec, + /// The peers we are looking for. + pub peers_to_report: Vec, } impl FindManyNodesContext { - /// Creates a new [`FindManyNodesContext`]. - pub fn new(query: QueryId, peers_to_report: Vec) -> Self { - Self { - query, - peers_to_report, - } - } + /// Creates a new [`FindManyNodesContext`]. + pub fn new(query: QueryId, peers_to_report: Vec) -> Self { + Self { query, peers_to_report } + } - /// Register response failure for `peer`. - pub fn register_response_failure(&mut self, _peer: PeerId) {} + /// Register response failure for `peer`. + pub fn register_response_failure(&mut self, _peer: PeerId) {} - /// Register `FIND_NODE` response from `peer`. - pub fn register_response(&mut self, _peer: PeerId, _peers: Vec) {} + /// Register `FIND_NODE` response from `peer`. + pub fn register_response(&mut self, _peer: PeerId, _peers: Vec) {} - /// Register a failure of sending a request to `peer`. - pub fn register_send_failure(&mut self, _peer: PeerId) {} + /// Register a failure of sending a request to `peer`. + pub fn register_send_failure(&mut self, _peer: PeerId) {} - /// Register a success of sending a request to `peer`. - pub fn register_send_success(&mut self, _peer: PeerId) {} + /// Register a success of sending a request to `peer`. + pub fn register_send_success(&mut self, _peer: PeerId) {} - /// Get next action for `peer`. - pub fn next_peer_action(&mut self, _peer: &PeerId) -> Option { - None - } + /// Get next action for `peer`. + pub fn next_peer_action(&mut self, _peer: &PeerId) -> Option { + None + } - /// Get next action for a `FIND_NODE` query. - pub fn next_action(&mut self) -> Option { - Some(QueryAction::QuerySucceeded { query: self.query }) - } + /// Get next action for a `FIND_NODE` query. + pub fn next_action(&mut self) -> Option { + Some(QueryAction::QuerySucceeded { query: self.query }) + } } diff --git a/client/litep2p/src/protocol/libp2p/kademlia/query/find_node.rs b/client/litep2p/src/protocol/libp2p/kademlia/query/find_node.rs index a354c397..8088261c 100644 --- a/client/litep2p/src/protocol/libp2p/kademlia/query/find_node.rs +++ b/client/litep2p/src/protocol/libp2p/kademlia/query/find_node.rs @@ -21,12 +21,12 @@ use bytes::Bytes; use crate::{ - protocol::libp2p::kademlia::{ - message::KademliaMessage, - query::{QueryAction, QueryId}, - types::{Distance, KademliaPeer, Key}, - }, - PeerId, + protocol::libp2p::kademlia::{ + message::KademliaMessage, + query::{QueryAction, QueryId}, + types::{Distance, KademliaPeer, Key}, + }, + PeerId, }; use std::collections::{BTreeMap, HashMap, HashSet, VecDeque}; @@ -40,678 +40,657 @@ const DEFAULT_PEER_TIMEOUT: std::time::Duration = std::time::Duration::from_secs /// The configuration needed to instantiate a new [`FindNodeContext`]. #[derive(Debug, Clone)] pub struct FindNodeConfig>> { - /// Local peer ID. - pub local_peer_id: PeerId, + /// Local peer ID. + pub local_peer_id: PeerId, - /// Replication factor. - pub replication_factor: usize, + /// Replication factor. + pub replication_factor: usize, - /// Parallelism factor. - pub parallelism_factor: usize, + /// Parallelism factor. + pub parallelism_factor: usize, - /// Query ID. - pub query: QueryId, + /// Query ID. + pub query: QueryId, - /// Target key. - pub target: Key, + /// Target key. + pub target: Key, } /// Context for `FIND_NODE` queries. #[derive(Debug)] pub struct FindNodeContext>> { - /// Query immutable config. - pub config: FindNodeConfig, - - /// Cached Kademlia message to send. - kad_message: Bytes, - - /// Peers from whom the `QueryEngine` is waiting to hear a response. - pub pending: HashMap, - - /// Queried candidates. - /// - /// These are the peers for whom the query has already been sent - /// and who have either returned their closest peers or failed to answer. - pub queried: HashSet, - - /// Candidates. - pub candidates: BTreeMap, - - /// Responses. - pub responses: BTreeMap, - - /// The timeout after which the pending request is no longer - /// counting towards the parallelism factor. - /// - /// This is used to prevent the query from getting stuck when a peer - /// is slow or fails to respond in due time. - peer_timeout: std::time::Duration, - /// The number of pending responses that count towards the parallelism factor. - /// - /// These represent the number of peers added to the `Self::pending` minus the number of peers - /// that have failed to respond within the `Self::peer_timeout` - pending_responses: usize, + /// Query immutable config. + pub config: FindNodeConfig, + + /// Cached Kademlia message to send. + kad_message: Bytes, + + /// Peers from whom the `QueryEngine` is waiting to hear a response. + pub pending: HashMap, + + /// Queried candidates. + /// + /// These are the peers for whom the query has already been sent + /// and who have either returned their closest peers or failed to answer. + pub queried: HashSet, + + /// Candidates. + pub candidates: BTreeMap, + + /// Responses. + pub responses: BTreeMap, + + /// The timeout after which the pending request is no longer + /// counting towards the parallelism factor. + /// + /// This is used to prevent the query from getting stuck when a peer + /// is slow or fails to respond in due time. + peer_timeout: std::time::Duration, + /// The number of pending responses that count towards the parallelism factor. + /// + /// These represent the number of peers added to the `Self::pending` minus the number of peers + /// that have failed to respond within the `Self::peer_timeout` + pending_responses: usize, } impl>> FindNodeContext { - /// Create new [`FindNodeContext`]. - pub fn new(config: FindNodeConfig, in_peers: VecDeque) -> Self { - let mut candidates = BTreeMap::new(); - - for candidate in &in_peers { - let distance = config.target.distance(&candidate.key); - candidates.insert(distance, candidate.clone()); - } - - let kad_message = KademliaMessage::find_node(config.target.clone().into_preimage()); - - Self { - config, - kad_message, - - candidates, - pending: HashMap::new(), - queried: HashSet::new(), - responses: BTreeMap::new(), - - peer_timeout: DEFAULT_PEER_TIMEOUT, - pending_responses: 0, - } - } - - /// Register response failure for `peer`. - pub fn register_response_failure(&mut self, peer: PeerId) { - let Some((peer, instant)) = self.pending.remove(&peer) else { - tracing::debug!(target: LOG_TARGET, query = ?self.config.query, ?peer, "pending peer doesn't exist during response failure"); - return; - }; - self.pending_responses = self.pending_responses.saturating_sub(1); - - tracing::trace!(target: LOG_TARGET, query = ?self.config.query, ?peer, elapsed = ?instant.elapsed(), "peer failed to respond"); - - self.queried.insert(peer.peer); - } - - /// Register `FIND_NODE` response from `peer`. - pub fn register_response(&mut self, peer: PeerId, peers: Vec) { - let Some((peer, instant)) = self.pending.remove(&peer) else { - tracing::debug!(target: LOG_TARGET, query = ?self.config.query, ?peer, "received response from peer but didn't expect it"); - return; - }; - self.pending_responses = self.pending_responses.saturating_sub(1); - - tracing::trace!(target: LOG_TARGET, query = ?self.config.query, ?peer, elapsed = ?instant.elapsed(), "received response from peer"); - - // calculate distance for `peer` from target and insert it if - // a) the map doesn't have 20 responses - // b) it can replace some other peer that has a higher distance - let distance = self.config.target.distance(&peer.key); - - // always mark the peer as queried to prevent it getting queried again - self.queried.insert(peer.peer); - - if self.responses.len() < self.config.replication_factor { - self.responses.insert(distance, peer); - } else { - // Update the furthest peer if this response is closer. - // Find the furthest distance. - let furthest_distance = - self.responses.last_entry().map(|entry| *entry.key()).unwrap_or(distance); - - // The response received from the peer is closer than the furthest response. - if distance < furthest_distance { - self.responses.insert(distance, peer); - - // Remove the furthest entry. - if self.responses.len() > self.config.replication_factor { - self.responses.pop_last(); - } - } - } - - let to_query_candidate = peers.into_iter().filter_map(|peer| { - // Peer already produced a response. - if self.queried.contains(&peer.peer) { - return None; - } - - // Peer was queried, awaiting response. - if self.pending.contains_key(&peer.peer) { - return None; - } - - // Local node. - if self.config.local_peer_id == peer.peer { - return None; - } - - Some(peer) - }); - - for candidate in to_query_candidate { - let distance = self.config.target.distance(&candidate.key); - self.candidates.insert(distance, candidate); - } - } - - /// Register a failure of sending `FIN_NODE` request to `peer`. - pub fn register_send_failure(&mut self, _peer: PeerId) { - // In case of a send failure, `register_response_failure` is called as well. - // Failure is handled there. - } - - /// Register a success of sending `FIND_NODE` request to `peer`. - pub fn register_send_success(&mut self, _peer: PeerId) { - // `FIND_NODE` requests are compound request-response pairs of messages, - // so we handle final success/failure in `register_response`/`register_response_failure`. - } - - /// Get next action for `peer`. - pub fn next_peer_action(&mut self, peer: &PeerId) -> Option { - self.pending.contains_key(peer).then_some(QueryAction::SendMessage { - query: self.config.query, - peer: *peer, - message: self.kad_message.clone(), - }) - } - - /// Schedule next peer for outbound `FIND_NODE` query. - fn schedule_next_peer(&mut self) -> Option { - tracing::trace!(target: LOG_TARGET, query = ?self.config.query, "get next peer"); - - let (_, candidate) = self.candidates.pop_first()?; - let peer = candidate.peer; - - tracing::trace!(target: LOG_TARGET, query = ?self.config.query, ?peer, "current candidate"); - self.pending.insert(candidate.peer, (candidate, std::time::Instant::now())); - self.pending_responses = self.pending_responses.saturating_add(1); - - Some(QueryAction::SendMessage { - query: self.config.query, - peer, - message: self.kad_message.clone(), - }) - } - - /// Check if the query cannot make any progress. - /// - /// Returns true when there are no pending responses and no candidates to query. - fn is_done(&self) -> bool { - self.pending.is_empty() && self.candidates.is_empty() - } - - /// Get next action for a `FIND_NODE` query. - pub fn next_action(&mut self) -> Option { - // If we cannot make progress, return the final result. - // A query failed when we are not able to identify one single peer. - if self.is_done() { - tracing::trace!( - target: LOG_TARGET, - query = ?self.config.query, - pending = self.pending.len(), - candidates = self.candidates.len(), - "query finished" - ); - - return if self.responses.is_empty() { - Some(QueryAction::QueryFailed { - query: self.config.query, - }) - } else { - Some(QueryAction::QuerySucceeded { - query: self.config.query, - }) - }; - } - - for (peer, instant) in self.pending.values() { - if instant.elapsed() > self.peer_timeout { - tracing::trace!( - target: LOG_TARGET, - query = ?self.config.query, - ?peer, - elapsed = ?instant.elapsed(), - "peer no longer counting towards parallelism factor" - ); - self.pending_responses = self.pending_responses.saturating_sub(1); - } - } - - // At this point, we either have pending responses or candidates to query; and we need more - // results. Ensure we do not exceed the parallelism factor. - if self.pending_responses == self.config.parallelism_factor { - return None; - } - - // Schedule the next peer to fill up the responses. - if self.responses.len() < self.config.replication_factor { - return self.schedule_next_peer(); - } - - // We can finish the query here, but check if there is a better candidate for the query. - match ( - self.candidates.first_key_value(), - self.responses.last_key_value(), - ) { - (Some((_, candidate_peer)), Some((worst_response_distance, _))) => { - let first_candidate_distance = self.config.target.distance(&candidate_peer.key); - if first_candidate_distance < *worst_response_distance { - return self.schedule_next_peer(); - } - } - - _ => (), - } - - // We have found enough responses and there are no better candidates to query. - Some(QueryAction::QuerySucceeded { - query: self.config.query, - }) - } + /// Create new [`FindNodeContext`]. + pub fn new(config: FindNodeConfig, in_peers: VecDeque) -> Self { + let mut candidates = BTreeMap::new(); + + for candidate in &in_peers { + let distance = config.target.distance(&candidate.key); + candidates.insert(distance, candidate.clone()); + } + + let kad_message = KademliaMessage::find_node(config.target.clone().into_preimage()); + + Self { + config, + kad_message, + + candidates, + pending: HashMap::new(), + queried: HashSet::new(), + responses: BTreeMap::new(), + + peer_timeout: DEFAULT_PEER_TIMEOUT, + pending_responses: 0, + } + } + + /// Register response failure for `peer`. + pub fn register_response_failure(&mut self, peer: PeerId) { + let Some((peer, instant)) = self.pending.remove(&peer) else { + tracing::debug!(target: LOG_TARGET, query = ?self.config.query, ?peer, "pending peer doesn't exist during response failure"); + return; + }; + self.pending_responses = self.pending_responses.saturating_sub(1); + + tracing::trace!(target: LOG_TARGET, query = ?self.config.query, ?peer, elapsed = ?instant.elapsed(), "peer failed to respond"); + + self.queried.insert(peer.peer); + } + + /// Register `FIND_NODE` response from `peer`. + pub fn register_response(&mut self, peer: PeerId, peers: Vec) { + let Some((peer, instant)) = self.pending.remove(&peer) else { + tracing::debug!(target: LOG_TARGET, query = ?self.config.query, ?peer, "received response from peer but didn't expect it"); + return; + }; + self.pending_responses = self.pending_responses.saturating_sub(1); + + tracing::trace!(target: LOG_TARGET, query = ?self.config.query, ?peer, elapsed = ?instant.elapsed(), "received response from peer"); + + // calculate distance for `peer` from target and insert it if + // a) the map doesn't have 20 responses + // b) it can replace some other peer that has a higher distance + let distance = self.config.target.distance(&peer.key); + + // always mark the peer as queried to prevent it getting queried again + self.queried.insert(peer.peer); + + if self.responses.len() < self.config.replication_factor { + self.responses.insert(distance, peer); + } else { + // Update the furthest peer if this response is closer. + // Find the furthest distance. + let furthest_distance = + self.responses.last_entry().map(|entry| *entry.key()).unwrap_or(distance); + + // The response received from the peer is closer than the furthest response. + if distance < furthest_distance { + self.responses.insert(distance, peer); + + // Remove the furthest entry. + if self.responses.len() > self.config.replication_factor { + self.responses.pop_last(); + } + } + } + + let to_query_candidate = peers.into_iter().filter_map(|peer| { + // Peer already produced a response. + if self.queried.contains(&peer.peer) { + return None; + } + + // Peer was queried, awaiting response. + if self.pending.contains_key(&peer.peer) { + return None; + } + + // Local node. + if self.config.local_peer_id == peer.peer { + return None; + } + + Some(peer) + }); + + for candidate in to_query_candidate { + let distance = self.config.target.distance(&candidate.key); + self.candidates.insert(distance, candidate); + } + } + + /// Register a failure of sending `FIN_NODE` request to `peer`. + pub fn register_send_failure(&mut self, _peer: PeerId) { + // In case of a send failure, `register_response_failure` is called as well. + // Failure is handled there. + } + + /// Register a success of sending `FIND_NODE` request to `peer`. + pub fn register_send_success(&mut self, _peer: PeerId) { + // `FIND_NODE` requests are compound request-response pairs of messages, + // so we handle final success/failure in `register_response`/`register_response_failure`. + } + + /// Get next action for `peer`. + pub fn next_peer_action(&mut self, peer: &PeerId) -> Option { + self.pending.contains_key(peer).then_some(QueryAction::SendMessage { + query: self.config.query, + peer: *peer, + message: self.kad_message.clone(), + }) + } + + /// Schedule next peer for outbound `FIND_NODE` query. + fn schedule_next_peer(&mut self) -> Option { + tracing::trace!(target: LOG_TARGET, query = ?self.config.query, "get next peer"); + + let (_, candidate) = self.candidates.pop_first()?; + let peer = candidate.peer; + + tracing::trace!(target: LOG_TARGET, query = ?self.config.query, ?peer, "current candidate"); + self.pending.insert(candidate.peer, (candidate, std::time::Instant::now())); + self.pending_responses = self.pending_responses.saturating_add(1); + + Some(QueryAction::SendMessage { + query: self.config.query, + peer, + message: self.kad_message.clone(), + }) + } + + /// Check if the query cannot make any progress. + /// + /// Returns true when there are no pending responses and no candidates to query. + fn is_done(&self) -> bool { + self.pending.is_empty() && self.candidates.is_empty() + } + + /// Get next action for a `FIND_NODE` query. + pub fn next_action(&mut self) -> Option { + // If we cannot make progress, return the final result. + // A query failed when we are not able to identify one single peer. + if self.is_done() { + tracing::trace!( + target: LOG_TARGET, + query = ?self.config.query, + pending = self.pending.len(), + candidates = self.candidates.len(), + "query finished" + ); + + return if self.responses.is_empty() { + Some(QueryAction::QueryFailed { query: self.config.query }) + } else { + Some(QueryAction::QuerySucceeded { query: self.config.query }) + }; + } + + for (peer, instant) in self.pending.values() { + if instant.elapsed() > self.peer_timeout { + tracing::trace!( + target: LOG_TARGET, + query = ?self.config.query, + ?peer, + elapsed = ?instant.elapsed(), + "peer no longer counting towards parallelism factor" + ); + self.pending_responses = self.pending_responses.saturating_sub(1); + } + } + + // At this point, we either have pending responses or candidates to query; and we need more + // results. Ensure we do not exceed the parallelism factor. + if self.pending_responses == self.config.parallelism_factor { + return None; + } + + // Schedule the next peer to fill up the responses. + if self.responses.len() < self.config.replication_factor { + return self.schedule_next_peer(); + } + + // We can finish the query here, but check if there is a better candidate for the query. + match (self.candidates.first_key_value(), self.responses.last_key_value()) { + (Some((_, candidate_peer)), Some((worst_response_distance, _))) => { + let first_candidate_distance = self.config.target.distance(&candidate_peer.key); + if first_candidate_distance < *worst_response_distance { + return self.schedule_next_peer(); + } + }, + + _ => (), + } + + // We have found enough responses and there are no better candidates to query. + Some(QueryAction::QuerySucceeded { query: self.config.query }) + } } #[cfg(test)] mod tests { - use super::*; - use crate::protocol::libp2p::kademlia::types::ConnectionType; - - fn default_config() -> FindNodeConfig> { - FindNodeConfig { - local_peer_id: PeerId::random(), - replication_factor: 20, - parallelism_factor: 10, - query: QueryId(0), - target: Key::new(vec![1, 2, 3]), - } - } - - fn peer_to_kad(peer: PeerId) -> KademliaPeer { - KademliaPeer { - peer, - key: Key::from(peer), - address_store: Default::default(), - connection: ConnectionType::Connected, - } - } - - fn setup_closest_responses() -> (PeerId, PeerId, FindNodeConfig) { - let peer_a = PeerId::random(); - let peer_b = PeerId::random(); - let target = PeerId::random(); - - let distance_a = Key::from(peer_a).distance(&Key::from(target)); - let distance_b = Key::from(peer_b).distance(&Key::from(target)); - - let (closest, furthest) = if distance_a < distance_b { - (peer_a, peer_b) - } else { - (peer_b, peer_a) - }; - - let config = FindNodeConfig { - parallelism_factor: 1, - replication_factor: 1, - target: Key::from(target), - local_peer_id: PeerId::random(), - query: QueryId(0), - }; - - (closest, furthest, config) - } - - #[test] - fn completes_when_no_candidates() { - let config = default_config(); - let mut context = FindNodeContext::new(config, VecDeque::new()); - assert!(context.is_done()); - let event = context.next_action().unwrap(); - match event { - QueryAction::QueryFailed { query, .. } => { - assert_eq!(query, QueryId(0)); - } - _ => panic!("Unexpected event"), - }; - } - - #[test] - fn fulfill_parallelism() { - let config = FindNodeConfig { - parallelism_factor: 3, - ..default_config() - }; - - let in_peers_set = (0..3).map(|_| PeerId::random()).collect::>(); - let in_peers = in_peers_set.iter().map(|peer| peer_to_kad(*peer)).collect(); - let mut context = FindNodeContext::new(config, in_peers); - - for num in 0..3 { - let event = context.next_action().unwrap(); - match event { - QueryAction::SendMessage { query, peer, .. } => { - assert_eq!(query, QueryId(0)); - // Added as pending. - assert_eq!(context.pending.len(), num + 1); - assert!(context.pending.contains_key(&peer)); - - // Check the peer is the one provided. - assert!(in_peers_set.contains(&peer)); - } - _ => panic!("Unexpected event"), - } - } - - // Fulfilled parallelism. - assert!(context.next_action().is_none()); - } - - #[test] - fn fulfill_parallelism_with_timeout_optimization() { - let config = FindNodeConfig { - parallelism_factor: 3, - ..default_config() - }; - - let in_peers_set = (0..4).map(|_| PeerId::random()).collect::>(); - let in_peers = in_peers_set.iter().map(|peer| peer_to_kad(*peer)).collect(); - let mut context = FindNodeContext::new(config, in_peers); - // Test overwrite. - context.peer_timeout = std::time::Duration::from_secs(1); - - for num in 0..3 { - let event = context.next_action().unwrap(); - match event { - QueryAction::SendMessage { query, peer, .. } => { - assert_eq!(query, QueryId(0)); - // Added as pending. - assert_eq!(context.pending.len(), num + 1); - assert!(context.pending.contains_key(&peer)); - - // Check the peer is the one provided. - assert!(in_peers_set.contains(&peer)); - } - _ => panic!("Unexpected event"), - } - } - - // Fulfilled parallelism. - assert!(context.next_action().is_none()); - - // Sleep more than 1 second. - std::thread::sleep(std::time::Duration::from_secs(2)); - - // The pending responses are reset only on the next query action. - assert_eq!(context.pending_responses, 3); - assert_eq!(context.pending.len(), 3); - - // This allows other peers to be queried. - let event = context.next_action().unwrap(); - match event { - QueryAction::SendMessage { query, peer, .. } => { - assert_eq!(query, QueryId(0)); - // Added as pending. - assert_eq!(context.pending.len(), 4); - assert!(context.pending.contains_key(&peer)); - - // Check the peer is the one provided. - assert!(in_peers_set.contains(&peer)); - } - _ => panic!("Unexpected event"), - } - - assert_eq!(context.pending_responses, 1); - assert_eq!(context.pending.len(), 4); - } - - #[test] - fn completes_when_responses() { - let config = FindNodeConfig { - parallelism_factor: 3, - replication_factor: 3, - ..default_config() - }; - - let peer_a = PeerId::random(); - let peer_b = PeerId::random(); - let peer_c = PeerId::random(); - - let in_peers_set: HashSet<_> = [peer_a, peer_b, peer_c].into_iter().collect(); - assert_eq!(in_peers_set.len(), 3); - - let in_peers = [peer_a, peer_b, peer_c].iter().map(|peer| peer_to_kad(*peer)).collect(); - let mut context = FindNodeContext::new(config, in_peers); - - // Schedule peer queries. - for num in 0..3 { - let event = context.next_action().unwrap(); - match event { - QueryAction::SendMessage { query, peer, .. } => { - assert_eq!(query, QueryId(0)); - // Added as pending. - assert_eq!(context.pending.len(), num + 1); - assert!(context.pending.contains_key(&peer)); - - // Check the peer is the one provided. - assert!(in_peers_set.contains(&peer)); - } - _ => panic!("Unexpected event"), - } - } - - // Checks a failed query that was not initiated. - let peer_d = PeerId::random(); - context.register_response_failure(peer_d); - assert_eq!(context.pending.len(), 3); - assert!(context.queried.is_empty()); - - // Provide responses back. - context.register_response(peer_a, vec![]); - assert_eq!(context.pending.len(), 2); - assert_eq!(context.queried.len(), 1); - assert_eq!(context.responses.len(), 1); - - // Provide different response from peer b with peer d as candidate. - context.register_response(peer_b, vec![peer_to_kad(peer_d)]); - assert_eq!(context.pending.len(), 1); - assert_eq!(context.queried.len(), 2); - assert_eq!(context.responses.len(), 2); - assert_eq!(context.candidates.len(), 1); - - // Peer C fails. - context.register_response_failure(peer_c); - assert!(context.pending.is_empty()); - assert_eq!(context.queried.len(), 3); - assert_eq!(context.responses.len(), 2); - - // Drain the last candidate. - let event = context.next_action().unwrap(); - match event { - QueryAction::SendMessage { query, peer, .. } => { - assert_eq!(query, QueryId(0)); - // Added as pending. - assert_eq!(context.pending.len(), 1); - assert_eq!(peer, peer_d); - } - _ => panic!("Unexpected event"), - } - - // Peer D responds. - context.register_response(peer_d, vec![]); - - // Produces the result. - let event = context.next_action().unwrap(); - match event { - QueryAction::QuerySucceeded { query, .. } => { - assert_eq!(query, QueryId(0)); - } - _ => panic!("Unexpected event"), - }; - } - - #[test] - fn offers_closest_responses() { - let (closest, furthest, config) = setup_closest_responses(); - - // Scenario where we should return with the number of responses. - let in_peers = vec![peer_to_kad(furthest), peer_to_kad(closest)]; - let mut context = FindNodeContext::new(config.clone(), in_peers.into_iter().collect()); - - let event = context.next_action().unwrap(); - match event { - QueryAction::SendMessage { query, peer, .. } => { - assert_eq!(query, QueryId(0)); - // Added as pending. - assert_eq!(context.pending.len(), 1); - assert!(context.pending.contains_key(&peer)); - - // The closest should be queried first regardless of the input order. - assert_eq!(closest, peer); - } - _ => panic!("Unexpected event"), - } - - context.register_response(closest, vec![]); - - let event = context.next_action().unwrap(); - match event { - QueryAction::QuerySucceeded { query } => { - assert_eq!(query, QueryId(0)); - } - _ => panic!("Unexpected event"), - }; - } - - #[test] - fn offers_closest_responses_with_better_candidates() { - let (closest, furthest, config) = setup_closest_responses(); - - // Scenario where the query is fulfilled however it continues because - // there is a closer peer to query. - let in_peers = vec![peer_to_kad(furthest)]; - let mut context = FindNodeContext::new(config, in_peers.into_iter().collect()); - - let event = context.next_action().unwrap(); - match event { - QueryAction::SendMessage { query, peer, .. } => { - assert_eq!(query, QueryId(0)); - // Added as pending. - assert_eq!(context.pending.len(), 1); - assert!(context.pending.contains_key(&peer)); - - // Furthest is the only peer available. - assert_eq!(furthest, peer); - } - _ => panic!("Unexpected event"), - } - - // Furthest node produces a response with the closest node. - // Even if we reach a total of 1 (parallelism factor) replies, we should continue. - context.register_response(furthest, vec![peer_to_kad(closest)]); - - let event = context.next_action().unwrap(); - match event { - QueryAction::SendMessage { query, peer, .. } => { - assert_eq!(query, QueryId(0)); - // Added as pending. - assert_eq!(context.pending.len(), 1); - assert!(context.pending.contains_key(&peer)); - - // Furthest provided another peer that is closer. - assert_eq!(closest, peer); - } - _ => panic!("Unexpected event"), - } - - // Even if we have the total number of responses, we have at least one - // inflight query which might be closer to the target. - assert!(context.next_action().is_none()); - - // Query finishes when receiving the response back. - context.register_response(closest, vec![]); - - let event = context.next_action().unwrap(); - match event { - QueryAction::QuerySucceeded { query, .. } => { - assert_eq!(query, QueryId(0)); - } - _ => panic!("Unexpected event"), - }; - } - - #[test] - fn keep_k_best_results() { - let mut peers = (0..6).map(|_| PeerId::random()).collect::>(); - let target = Key::from(PeerId::random()); - // Sort the peers by their distance to the target in descending order. - peers.sort_by_key(|peer| std::cmp::Reverse(target.distance(&Key::from(*peer)))); - - let config = FindNodeConfig { - parallelism_factor: 3, - replication_factor: 3, - target, - local_peer_id: PeerId::random(), - query: QueryId(0), - }; - - let in_peers = vec![peers[0], peers[1], peers[2]] - .iter() - .map(|peer| peer_to_kad(*peer)) - .collect(); - let mut context = FindNodeContext::new(config, in_peers); - - // Schedule peer queries. - for num in 0..3 { - let event = context.next_action().unwrap(); - match event { - QueryAction::SendMessage { query, peer, .. } => { - assert_eq!(query, QueryId(0)); - // Added as pending. - assert_eq!(context.pending.len(), num + 1); - assert!(context.pending.contains_key(&peer)); - } - _ => panic!("Unexpected event"), - } - } - - // Each peer responds with a better (closer) peer. - context.register_response(peers[0], vec![peer_to_kad(peers[3])]); - context.register_response(peers[1], vec![peer_to_kad(peers[4])]); - context.register_response(peers[2], vec![peer_to_kad(peers[5])]); - - // Must schedule better peers. - for num in 0..3 { - let event = context.next_action().unwrap(); - match event { - QueryAction::SendMessage { query, peer, .. } => { - assert_eq!(query, QueryId(0)); - // Added as pending. - assert_eq!(context.pending.len(), num + 1); - assert!(context.pending.contains_key(&peer)); - } - _ => panic!("Unexpected event"), - } - } - - context.register_response(peers[3], vec![]); - context.register_response(peers[4], vec![]); - context.register_response(peers[5], vec![]); - - // Produces the result. - let event = context.next_action().unwrap(); - match event { - QueryAction::QuerySucceeded { query } => { - assert_eq!(query, QueryId(0)); - } - _ => panic!("Unexpected event"), - }; - - // Because the FindNode query keeps a window of the best K (3 in this case) peers, - // we expect to produce the best K peers. As opposed to having only the last entry - // updated, which would have produced [peer[0], peer[1], peer[5]]. - - // Check the responses. - let responses = context.responses.values().map(|peer| peer.peer).collect::>(); - // Note: peers are returned in order closest to the target, our `peers` input is sorted in - // decreasing order. - assert_eq!(responses, [peers[5], peers[4], peers[3]]); - } + use super::*; + use crate::protocol::libp2p::kademlia::types::ConnectionType; + + fn default_config() -> FindNodeConfig> { + FindNodeConfig { + local_peer_id: PeerId::random(), + replication_factor: 20, + parallelism_factor: 10, + query: QueryId(0), + target: Key::new(vec![1, 2, 3]), + } + } + + fn peer_to_kad(peer: PeerId) -> KademliaPeer { + KademliaPeer { + peer, + key: Key::from(peer), + address_store: Default::default(), + connection: ConnectionType::Connected, + } + } + + fn setup_closest_responses() -> (PeerId, PeerId, FindNodeConfig) { + let peer_a = PeerId::random(); + let peer_b = PeerId::random(); + let target = PeerId::random(); + + let distance_a = Key::from(peer_a).distance(&Key::from(target)); + let distance_b = Key::from(peer_b).distance(&Key::from(target)); + + let (closest, furthest) = + if distance_a < distance_b { (peer_a, peer_b) } else { (peer_b, peer_a) }; + + let config = FindNodeConfig { + parallelism_factor: 1, + replication_factor: 1, + target: Key::from(target), + local_peer_id: PeerId::random(), + query: QueryId(0), + }; + + (closest, furthest, config) + } + + #[test] + fn completes_when_no_candidates() { + let config = default_config(); + let mut context = FindNodeContext::new(config, VecDeque::new()); + assert!(context.is_done()); + let event = context.next_action().unwrap(); + match event { + QueryAction::QueryFailed { query, .. } => { + assert_eq!(query, QueryId(0)); + }, + _ => panic!("Unexpected event"), + }; + } + + #[test] + fn fulfill_parallelism() { + let config = FindNodeConfig { parallelism_factor: 3, ..default_config() }; + + let in_peers_set = (0..3).map(|_| PeerId::random()).collect::>(); + let in_peers = in_peers_set.iter().map(|peer| peer_to_kad(*peer)).collect(); + let mut context = FindNodeContext::new(config, in_peers); + + for num in 0..3 { + let event = context.next_action().unwrap(); + match event { + QueryAction::SendMessage { query, peer, .. } => { + assert_eq!(query, QueryId(0)); + // Added as pending. + assert_eq!(context.pending.len(), num + 1); + assert!(context.pending.contains_key(&peer)); + + // Check the peer is the one provided. + assert!(in_peers_set.contains(&peer)); + }, + _ => panic!("Unexpected event"), + } + } + + // Fulfilled parallelism. + assert!(context.next_action().is_none()); + } + + #[test] + fn fulfill_parallelism_with_timeout_optimization() { + let config = FindNodeConfig { parallelism_factor: 3, ..default_config() }; + + let in_peers_set = (0..4).map(|_| PeerId::random()).collect::>(); + let in_peers = in_peers_set.iter().map(|peer| peer_to_kad(*peer)).collect(); + let mut context = FindNodeContext::new(config, in_peers); + // Test overwrite. + context.peer_timeout = std::time::Duration::from_secs(1); + + for num in 0..3 { + let event = context.next_action().unwrap(); + match event { + QueryAction::SendMessage { query, peer, .. } => { + assert_eq!(query, QueryId(0)); + // Added as pending. + assert_eq!(context.pending.len(), num + 1); + assert!(context.pending.contains_key(&peer)); + + // Check the peer is the one provided. + assert!(in_peers_set.contains(&peer)); + }, + _ => panic!("Unexpected event"), + } + } + + // Fulfilled parallelism. + assert!(context.next_action().is_none()); + + // Sleep more than 1 second. + std::thread::sleep(std::time::Duration::from_secs(2)); + + // The pending responses are reset only on the next query action. + assert_eq!(context.pending_responses, 3); + assert_eq!(context.pending.len(), 3); + + // This allows other peers to be queried. + let event = context.next_action().unwrap(); + match event { + QueryAction::SendMessage { query, peer, .. } => { + assert_eq!(query, QueryId(0)); + // Added as pending. + assert_eq!(context.pending.len(), 4); + assert!(context.pending.contains_key(&peer)); + + // Check the peer is the one provided. + assert!(in_peers_set.contains(&peer)); + }, + _ => panic!("Unexpected event"), + } + + assert_eq!(context.pending_responses, 1); + assert_eq!(context.pending.len(), 4); + } + + #[test] + fn completes_when_responses() { + let config = + FindNodeConfig { parallelism_factor: 3, replication_factor: 3, ..default_config() }; + + let peer_a = PeerId::random(); + let peer_b = PeerId::random(); + let peer_c = PeerId::random(); + + let in_peers_set: HashSet<_> = [peer_a, peer_b, peer_c].into_iter().collect(); + assert_eq!(in_peers_set.len(), 3); + + let in_peers = [peer_a, peer_b, peer_c].iter().map(|peer| peer_to_kad(*peer)).collect(); + let mut context = FindNodeContext::new(config, in_peers); + + // Schedule peer queries. + for num in 0..3 { + let event = context.next_action().unwrap(); + match event { + QueryAction::SendMessage { query, peer, .. } => { + assert_eq!(query, QueryId(0)); + // Added as pending. + assert_eq!(context.pending.len(), num + 1); + assert!(context.pending.contains_key(&peer)); + + // Check the peer is the one provided. + assert!(in_peers_set.contains(&peer)); + }, + _ => panic!("Unexpected event"), + } + } + + // Checks a failed query that was not initiated. + let peer_d = PeerId::random(); + context.register_response_failure(peer_d); + assert_eq!(context.pending.len(), 3); + assert!(context.queried.is_empty()); + + // Provide responses back. + context.register_response(peer_a, vec![]); + assert_eq!(context.pending.len(), 2); + assert_eq!(context.queried.len(), 1); + assert_eq!(context.responses.len(), 1); + + // Provide different response from peer b with peer d as candidate. + context.register_response(peer_b, vec![peer_to_kad(peer_d)]); + assert_eq!(context.pending.len(), 1); + assert_eq!(context.queried.len(), 2); + assert_eq!(context.responses.len(), 2); + assert_eq!(context.candidates.len(), 1); + + // Peer C fails. + context.register_response_failure(peer_c); + assert!(context.pending.is_empty()); + assert_eq!(context.queried.len(), 3); + assert_eq!(context.responses.len(), 2); + + // Drain the last candidate. + let event = context.next_action().unwrap(); + match event { + QueryAction::SendMessage { query, peer, .. } => { + assert_eq!(query, QueryId(0)); + // Added as pending. + assert_eq!(context.pending.len(), 1); + assert_eq!(peer, peer_d); + }, + _ => panic!("Unexpected event"), + } + + // Peer D responds. + context.register_response(peer_d, vec![]); + + // Produces the result. + let event = context.next_action().unwrap(); + match event { + QueryAction::QuerySucceeded { query, .. } => { + assert_eq!(query, QueryId(0)); + }, + _ => panic!("Unexpected event"), + }; + } + + #[test] + fn offers_closest_responses() { + let (closest, furthest, config) = setup_closest_responses(); + + // Scenario where we should return with the number of responses. + let in_peers = vec![peer_to_kad(furthest), peer_to_kad(closest)]; + let mut context = FindNodeContext::new(config.clone(), in_peers.into_iter().collect()); + + let event = context.next_action().unwrap(); + match event { + QueryAction::SendMessage { query, peer, .. } => { + assert_eq!(query, QueryId(0)); + // Added as pending. + assert_eq!(context.pending.len(), 1); + assert!(context.pending.contains_key(&peer)); + + // The closest should be queried first regardless of the input order. + assert_eq!(closest, peer); + }, + _ => panic!("Unexpected event"), + } + + context.register_response(closest, vec![]); + + let event = context.next_action().unwrap(); + match event { + QueryAction::QuerySucceeded { query } => { + assert_eq!(query, QueryId(0)); + }, + _ => panic!("Unexpected event"), + }; + } + + #[test] + fn offers_closest_responses_with_better_candidates() { + let (closest, furthest, config) = setup_closest_responses(); + + // Scenario where the query is fulfilled however it continues because + // there is a closer peer to query. + let in_peers = vec![peer_to_kad(furthest)]; + let mut context = FindNodeContext::new(config, in_peers.into_iter().collect()); + + let event = context.next_action().unwrap(); + match event { + QueryAction::SendMessage { query, peer, .. } => { + assert_eq!(query, QueryId(0)); + // Added as pending. + assert_eq!(context.pending.len(), 1); + assert!(context.pending.contains_key(&peer)); + + // Furthest is the only peer available. + assert_eq!(furthest, peer); + }, + _ => panic!("Unexpected event"), + } + + // Furthest node produces a response with the closest node. + // Even if we reach a total of 1 (parallelism factor) replies, we should continue. + context.register_response(furthest, vec![peer_to_kad(closest)]); + + let event = context.next_action().unwrap(); + match event { + QueryAction::SendMessage { query, peer, .. } => { + assert_eq!(query, QueryId(0)); + // Added as pending. + assert_eq!(context.pending.len(), 1); + assert!(context.pending.contains_key(&peer)); + + // Furthest provided another peer that is closer. + assert_eq!(closest, peer); + }, + _ => panic!("Unexpected event"), + } + + // Even if we have the total number of responses, we have at least one + // inflight query which might be closer to the target. + assert!(context.next_action().is_none()); + + // Query finishes when receiving the response back. + context.register_response(closest, vec![]); + + let event = context.next_action().unwrap(); + match event { + QueryAction::QuerySucceeded { query, .. } => { + assert_eq!(query, QueryId(0)); + }, + _ => panic!("Unexpected event"), + }; + } + + #[test] + fn keep_k_best_results() { + let mut peers = (0..6).map(|_| PeerId::random()).collect::>(); + let target = Key::from(PeerId::random()); + // Sort the peers by their distance to the target in descending order. + peers.sort_by_key(|peer| std::cmp::Reverse(target.distance(&Key::from(*peer)))); + + let config = FindNodeConfig { + parallelism_factor: 3, + replication_factor: 3, + target, + local_peer_id: PeerId::random(), + query: QueryId(0), + }; + + let in_peers = vec![peers[0], peers[1], peers[2]] + .iter() + .map(|peer| peer_to_kad(*peer)) + .collect(); + let mut context = FindNodeContext::new(config, in_peers); + + // Schedule peer queries. + for num in 0..3 { + let event = context.next_action().unwrap(); + match event { + QueryAction::SendMessage { query, peer, .. } => { + assert_eq!(query, QueryId(0)); + // Added as pending. + assert_eq!(context.pending.len(), num + 1); + assert!(context.pending.contains_key(&peer)); + }, + _ => panic!("Unexpected event"), + } + } + + // Each peer responds with a better (closer) peer. + context.register_response(peers[0], vec![peer_to_kad(peers[3])]); + context.register_response(peers[1], vec![peer_to_kad(peers[4])]); + context.register_response(peers[2], vec![peer_to_kad(peers[5])]); + + // Must schedule better peers. + for num in 0..3 { + let event = context.next_action().unwrap(); + match event { + QueryAction::SendMessage { query, peer, .. } => { + assert_eq!(query, QueryId(0)); + // Added as pending. + assert_eq!(context.pending.len(), num + 1); + assert!(context.pending.contains_key(&peer)); + }, + _ => panic!("Unexpected event"), + } + } + + context.register_response(peers[3], vec![]); + context.register_response(peers[4], vec![]); + context.register_response(peers[5], vec![]); + + // Produces the result. + let event = context.next_action().unwrap(); + match event { + QueryAction::QuerySucceeded { query } => { + assert_eq!(query, QueryId(0)); + }, + _ => panic!("Unexpected event"), + }; + + // Because the FindNode query keeps a window of the best K (3 in this case) peers, + // we expect to produce the best K peers. As opposed to having only the last entry + // updated, which would have produced [peer[0], peer[1], peer[5]]. + + // Check the responses. + let responses = context.responses.values().map(|peer| peer.peer).collect::>(); + // Note: peers are returned in order closest to the target, our `peers` input is sorted in + // decreasing order. + assert_eq!(responses, [peers[5], peers[4], peers[3]]); + } } diff --git a/client/litep2p/src/protocol/libp2p/kademlia/query/get_providers.rs b/client/litep2p/src/protocol/libp2p/kademlia/query/get_providers.rs index 9596e036..461bab5c 100644 --- a/client/litep2p/src/protocol/libp2p/kademlia/query/get_providers.rs +++ b/client/litep2p/src/protocol/libp2p/kademlia/query/get_providers.rs @@ -21,14 +21,14 @@ use bytes::Bytes; use crate::{ - protocol::libp2p::kademlia::{ - message::KademliaMessage, - query::{QueryAction, QueryId}, - record::{ContentProvider, Key as RecordKey}, - types::{Distance, KademliaPeer, Key}, - }, - types::multiaddr::Multiaddr, - PeerId, + protocol::libp2p::kademlia::{ + message::KademliaMessage, + query::{QueryAction, QueryId}, + record::{ContentProvider, Key as RecordKey}, + types::{Distance, KademliaPeer, Key}, + }, + types::multiaddr::Multiaddr, + PeerId, }; use std::collections::{BTreeMap, HashMap, HashSet, VecDeque}; @@ -39,490 +39,475 @@ const LOG_TARGET: &str = "litep2p::ipfs::kademlia::query::get_providers"; /// The configuration needed to instantiate a new [`GetProvidersContext`]. #[derive(Debug)] pub struct GetProvidersConfig { - /// Local peer ID. - pub local_peer_id: PeerId, + /// Local peer ID. + pub local_peer_id: PeerId, - /// Parallelism factor. - pub parallelism_factor: usize, + /// Parallelism factor. + pub parallelism_factor: usize, - /// Query ID. - pub query: QueryId, + /// Query ID. + pub query: QueryId, - /// Target key. - pub target: Key, + /// Target key. + pub target: Key, - /// Known providers from the local store. - pub known_providers: Vec, + /// Known providers from the local store. + pub known_providers: Vec, } #[derive(Debug)] pub struct GetProvidersContext { - /// Query immutable config. - pub config: GetProvidersConfig, + /// Query immutable config. + pub config: GetProvidersConfig, - /// Cached Kademlia message to send. - kad_message: Bytes, + /// Cached Kademlia message to send. + kad_message: Bytes, - /// Peers from whom the `QueryEngine` is waiting to hear a response. - pub pending: HashMap, + /// Peers from whom the `QueryEngine` is waiting to hear a response. + pub pending: HashMap, - /// Queried candidates. - /// - /// These are the peers for whom the query has already been sent - /// and who have either returned their closest peers or failed to answer. - pub queried: HashSet, + /// Queried candidates. + /// + /// These are the peers for whom the query has already been sent + /// and who have either returned their closest peers or failed to answer. + pub queried: HashSet, - /// Candidates. - pub candidates: BTreeMap, + /// Candidates. + pub candidates: BTreeMap, - /// Found providers. - pub found_providers: Vec, + /// Found providers. + pub found_providers: Vec, } impl GetProvidersContext { - /// Create new [`GetProvidersContext`]. - pub fn new(config: GetProvidersConfig, candidate_peers: VecDeque) -> Self { - let mut candidates = BTreeMap::new(); - - for peer in &candidate_peers { - let distance = config.target.distance(&peer.key); - candidates.insert(distance, peer.clone()); - } - - let kad_message = - KademliaMessage::get_providers_request(config.target.clone().into_preimage()); - - Self { - config, - kad_message, - candidates, - pending: HashMap::new(), - queried: HashSet::new(), - found_providers: Vec::new(), - } - } - - /// Get the found providers. - pub fn found_providers(self) -> Vec { - Self::merge_and_sort_providers( - self.config.known_providers.into_iter().chain(self.found_providers), - self.config.target, - ) - } - - fn merge_and_sort_providers( - found_providers: impl IntoIterator, - target: Key, - ) -> Vec { - // Merge addresses of different provider records of the same peer. - let mut providers = HashMap::>::new(); - found_providers.into_iter().for_each(|provider| { - providers.entry(provider.peer).or_default().extend(provider.addresses()) - }); - - // Convert into `Vec` - let mut providers = providers - .into_iter() - .map(|(peer, addresses)| ContentProvider { - peer, - addresses: addresses.into_iter().collect(), - }) - .collect::>(); - - // Sort by the provider distance to the target key. - providers.sort_unstable_by(|p1, p2| { - Key::from(p1.peer).distance(&target).cmp(&Key::from(p2.peer).distance(&target)) - }); - - providers - } - - /// Register response failure for `peer`. - pub fn register_response_failure(&mut self, peer: PeerId) { - let Some(peer) = self.pending.remove(&peer) else { - tracing::debug!( - target: LOG_TARGET, - query = ?self.config.query, - ?peer, - "`GetProvidersContext`: pending peer doesn't exist", - ); - return; - }; - - self.queried.insert(peer.peer); - } - - /// Register `GET_PROVIDERS` response from `peer`. - pub fn register_response( - &mut self, - peer: PeerId, - providers: impl IntoIterator, - closer_peers: impl IntoIterator, - ) { - tracing::trace!( - target: LOG_TARGET, - query = ?self.config.query, - ?peer, - "`GetProvidersContext`: received response from peer", - ); - - let Some(peer) = self.pending.remove(&peer) else { - tracing::debug!( - target: LOG_TARGET, - query = ?self.config.query, - ?peer, - "`GetProvidersContext`: received response from peer but didn't expect it", - ); - return; - }; - - self.found_providers.extend(providers); - - // Add the queried peer to `queried` and all new peers which haven't been - // queried to `candidates` - self.queried.insert(peer.peer); - - let to_query_candidate = closer_peers.into_iter().filter_map(|peer| { - // Peer already produced a response. - if self.queried.contains(&peer.peer) { - return None; - } - - // Peer was queried, awaiting response. - if self.pending.contains_key(&peer.peer) { - return None; - } - - // Local node. - if self.config.local_peer_id == peer.peer { - return None; - } - - Some(peer) - }); - - for candidate in to_query_candidate { - let distance = self.config.target.distance(&candidate.key); - self.candidates.insert(distance, candidate); - } - } - - /// Register a failure of sending a `GET_PROVIDERS` request to `peer`. - pub fn register_send_failure(&mut self, _peer: PeerId) { - // In case of a send failure, `register_response_failure` is called as well. - // Failure is handled there. - } - - /// Register a success of sending a `GET_PROVIDERS` request to `peer`. - pub fn register_send_success(&mut self, _peer: PeerId) { - // `GET_PROVIDERS` requests are compound request-response pairs of messages, - // so we handle final success/failure in `register_response`/`register_response_failure`. - } - - /// Get next action for `peer`. - // TODO: https://github.com/paritytech/litep2p/issues/40 remove this and store the next action to `PeerAction` - pub fn next_peer_action(&mut self, peer: &PeerId) -> Option { - self.pending.contains_key(peer).then_some(QueryAction::SendMessage { - query: self.config.query, - peer: *peer, - message: self.kad_message.clone(), - }) - } - - /// Schedule next peer for outbound `GET_VALUE` query. - fn schedule_next_peer(&mut self) -> Option { - tracing::trace!( - target: LOG_TARGET, - query = ?self.config.query, - "`GetProvidersContext`: get next peer", - ); - - let (_, candidate) = self.candidates.pop_first()?; - let peer = candidate.peer; - - tracing::trace!( - target: LOG_TARGET, - query = ?self.config.query, - ?peer, - "`GetProvidersContext`: current candidate", - ); - self.pending.insert(candidate.peer, candidate); - - Some(QueryAction::SendMessage { - query: self.config.query, - peer, - message: self.kad_message.clone(), - }) - } - - /// Check if the query cannot make any progress. - /// - /// Returns true when there are no pending responses and no candidates to query. - fn is_done(&self) -> bool { - self.pending.is_empty() && self.candidates.is_empty() - } - - /// Get next action for a `GET_PROVIDERS` query. - pub fn next_action(&mut self) -> Option { - if self.is_done() { - // If we cannot make progress, return the final result. - // A query failed when we are not able to find any providers. - if self.found_providers.is_empty() { - Some(QueryAction::QueryFailed { - query: self.config.query, - }) - } else { - Some(QueryAction::QuerySucceeded { - query: self.config.query, - }) - } - } else if self.pending.len() == self.config.parallelism_factor { - // At this point, we either have pending responses or candidates to query; and we need - // more records. Ensure we do not exceed the parallelism factor. - None - } else { - self.schedule_next_peer() - } - } + /// Create new [`GetProvidersContext`]. + pub fn new(config: GetProvidersConfig, candidate_peers: VecDeque) -> Self { + let mut candidates = BTreeMap::new(); + + for peer in &candidate_peers { + let distance = config.target.distance(&peer.key); + candidates.insert(distance, peer.clone()); + } + + let kad_message = + KademliaMessage::get_providers_request(config.target.clone().into_preimage()); + + Self { + config, + kad_message, + candidates, + pending: HashMap::new(), + queried: HashSet::new(), + found_providers: Vec::new(), + } + } + + /// Get the found providers. + pub fn found_providers(self) -> Vec { + Self::merge_and_sort_providers( + self.config.known_providers.into_iter().chain(self.found_providers), + self.config.target, + ) + } + + fn merge_and_sort_providers( + found_providers: impl IntoIterator, + target: Key, + ) -> Vec { + // Merge addresses of different provider records of the same peer. + let mut providers = HashMap::>::new(); + found_providers.into_iter().for_each(|provider| { + providers.entry(provider.peer).or_default().extend(provider.addresses()) + }); + + // Convert into `Vec` + let mut providers = providers + .into_iter() + .map(|(peer, addresses)| ContentProvider { + peer, + addresses: addresses.into_iter().collect(), + }) + .collect::>(); + + // Sort by the provider distance to the target key. + providers.sort_unstable_by(|p1, p2| { + Key::from(p1.peer).distance(&target).cmp(&Key::from(p2.peer).distance(&target)) + }); + + providers + } + + /// Register response failure for `peer`. + pub fn register_response_failure(&mut self, peer: PeerId) { + let Some(peer) = self.pending.remove(&peer) else { + tracing::debug!( + target: LOG_TARGET, + query = ?self.config.query, + ?peer, + "`GetProvidersContext`: pending peer doesn't exist", + ); + return; + }; + + self.queried.insert(peer.peer); + } + + /// Register `GET_PROVIDERS` response from `peer`. + pub fn register_response( + &mut self, + peer: PeerId, + providers: impl IntoIterator, + closer_peers: impl IntoIterator, + ) { + tracing::trace!( + target: LOG_TARGET, + query = ?self.config.query, + ?peer, + "`GetProvidersContext`: received response from peer", + ); + + let Some(peer) = self.pending.remove(&peer) else { + tracing::debug!( + target: LOG_TARGET, + query = ?self.config.query, + ?peer, + "`GetProvidersContext`: received response from peer but didn't expect it", + ); + return; + }; + + self.found_providers.extend(providers); + + // Add the queried peer to `queried` and all new peers which haven't been + // queried to `candidates` + self.queried.insert(peer.peer); + + let to_query_candidate = closer_peers.into_iter().filter_map(|peer| { + // Peer already produced a response. + if self.queried.contains(&peer.peer) { + return None; + } + + // Peer was queried, awaiting response. + if self.pending.contains_key(&peer.peer) { + return None; + } + + // Local node. + if self.config.local_peer_id == peer.peer { + return None; + } + + Some(peer) + }); + + for candidate in to_query_candidate { + let distance = self.config.target.distance(&candidate.key); + self.candidates.insert(distance, candidate); + } + } + + /// Register a failure of sending a `GET_PROVIDERS` request to `peer`. + pub fn register_send_failure(&mut self, _peer: PeerId) { + // In case of a send failure, `register_response_failure` is called as well. + // Failure is handled there. + } + + /// Register a success of sending a `GET_PROVIDERS` request to `peer`. + pub fn register_send_success(&mut self, _peer: PeerId) { + // `GET_PROVIDERS` requests are compound request-response pairs of messages, + // so we handle final success/failure in `register_response`/`register_response_failure`. + } + + /// Get next action for `peer`. + // TODO: https://github.com/paritytech/litep2p/issues/40 remove this and store the next action to `PeerAction` + pub fn next_peer_action(&mut self, peer: &PeerId) -> Option { + self.pending.contains_key(peer).then_some(QueryAction::SendMessage { + query: self.config.query, + peer: *peer, + message: self.kad_message.clone(), + }) + } + + /// Schedule next peer for outbound `GET_VALUE` query. + fn schedule_next_peer(&mut self) -> Option { + tracing::trace!( + target: LOG_TARGET, + query = ?self.config.query, + "`GetProvidersContext`: get next peer", + ); + + let (_, candidate) = self.candidates.pop_first()?; + let peer = candidate.peer; + + tracing::trace!( + target: LOG_TARGET, + query = ?self.config.query, + ?peer, + "`GetProvidersContext`: current candidate", + ); + self.pending.insert(candidate.peer, candidate); + + Some(QueryAction::SendMessage { + query: self.config.query, + peer, + message: self.kad_message.clone(), + }) + } + + /// Check if the query cannot make any progress. + /// + /// Returns true when there are no pending responses and no candidates to query. + fn is_done(&self) -> bool { + self.pending.is_empty() && self.candidates.is_empty() + } + + /// Get next action for a `GET_PROVIDERS` query. + pub fn next_action(&mut self) -> Option { + if self.is_done() { + // If we cannot make progress, return the final result. + // A query failed when we are not able to find any providers. + if self.found_providers.is_empty() { + Some(QueryAction::QueryFailed { query: self.config.query }) + } else { + Some(QueryAction::QuerySucceeded { query: self.config.query }) + } + } else if self.pending.len() == self.config.parallelism_factor { + // At this point, we either have pending responses or candidates to query; and we need + // more records. Ensure we do not exceed the parallelism factor. + None + } else { + self.schedule_next_peer() + } + } } #[cfg(test)] mod tests { - use super::*; - use crate::protocol::libp2p::kademlia::types::ConnectionType; - use multiaddr::multiaddr; - - fn default_config() -> GetProvidersConfig { - GetProvidersConfig { - local_peer_id: PeerId::random(), - parallelism_factor: 3, - query: QueryId(0), - target: Key::new(vec![1, 2, 3].into()), - known_providers: vec![], - } - } - - fn peer_to_kad(peer: PeerId) -> KademliaPeer { - KademliaPeer { - peer, - key: Key::from(peer), - address_store: Default::default(), - connection: ConnectionType::NotConnected, - } - } - - fn peer_to_kad_with_addresses(peer: PeerId, addresses: Vec) -> KademliaPeer { - KademliaPeer::new(peer, addresses, ConnectionType::NotConnected) - } - - #[test] - fn completes_when_no_candidates() { - let config = default_config(); - - let mut context = GetProvidersContext::new(config, VecDeque::new()); - assert!(context.is_done()); - - let event = context.next_action().unwrap(); - match event { - QueryAction::QueryFailed { query, .. } => { - assert_eq!(query, QueryId(0)); - } - _ => panic!("Unexpected event"), - } - } - - #[test] - fn fulfill_parallelism() { - let config = GetProvidersConfig { - parallelism_factor: 3, - ..default_config() - }; - - let candidate_peer_set: HashSet<_> = - [PeerId::random(), PeerId::random(), PeerId::random()].into_iter().collect(); - assert_eq!(candidate_peer_set.len(), 3); - - let candidate_peers = candidate_peer_set.iter().map(|peer| peer_to_kad(*peer)).collect(); - let mut context = GetProvidersContext::new(config, candidate_peers); - - for num in 0..3 { - let event = context.next_action().unwrap(); - match event { - QueryAction::SendMessage { query, peer, .. } => { - assert_eq!(query, QueryId(0)); - // Added as pending. - assert_eq!(context.pending.len(), num + 1); - assert!(context.pending.contains_key(&peer)); - - // Check the peer is the one provided. - assert!(candidate_peer_set.contains(&peer)); - } - _ => panic!("Unexpected event"), - } - } - - // Fulfilled parallelism. - assert!(context.next_action().is_none()); - } - - #[test] - fn completes_when_responses() { - let config = GetProvidersConfig { - parallelism_factor: 3, - ..default_config() - }; - - let peer_a = PeerId::random(); - let peer_b = PeerId::random(); - let peer_c = PeerId::random(); - - let candidate_peer_set: HashSet<_> = [peer_a, peer_b, peer_c].into_iter().collect(); - assert_eq!(candidate_peer_set.len(), 3); - - let candidate_peers = - [peer_a, peer_b, peer_c].iter().map(|peer| peer_to_kad(*peer)).collect(); - let mut context = GetProvidersContext::new(config, candidate_peers); - - let [provider1, provider2, provider3, provider4] = (0..4) - .map(|_| ContentProvider { - peer: PeerId::random(), - addresses: vec![], - }) - .collect::>() - .try_into() - .unwrap(); - - // Schedule peer queries. - for num in 0..3 { - let event = context.next_action().unwrap(); - match event { - QueryAction::SendMessage { query, peer, .. } => { - assert_eq!(query, QueryId(0)); - // Added as pending. - assert_eq!(context.pending.len(), num + 1); - assert!(context.pending.contains_key(&peer)); - - // Check the peer is the one provided. - assert!(candidate_peer_set.contains(&peer)); - } - _ => panic!("Unexpected event"), - } - } - - // Checks a failed query that was not initiated. - let peer_d = PeerId::random(); - context.register_response_failure(peer_d); - assert_eq!(context.pending.len(), 3); - assert!(context.queried.is_empty()); - - // Provide responses back. - let providers = vec![provider1.clone().into(), provider2.clone().into()]; - context.register_response(peer_a, providers, vec![]); - assert_eq!(context.pending.len(), 2); - assert_eq!(context.queried.len(), 1); - assert_eq!(context.found_providers.len(), 2); - - // Provide different response from peer b with peer d as candidate. - let providers = vec![provider2.clone().into(), provider3.clone().into()]; - let candidates = vec![peer_to_kad(peer_d)]; - context.register_response(peer_b, providers, candidates); - assert_eq!(context.pending.len(), 1); - assert_eq!(context.queried.len(), 2); - assert_eq!(context.found_providers.len(), 4); - assert_eq!(context.candidates.len(), 1); - - // Peer C fails. - context.register_response_failure(peer_c); - assert!(context.pending.is_empty()); - assert_eq!(context.queried.len(), 3); - assert_eq!(context.found_providers.len(), 4); - - // Drain the last candidate. - let event = context.next_action().unwrap(); - match event { - QueryAction::SendMessage { query, peer, .. } => { - assert_eq!(query, QueryId(0)); - // Added as pending. - assert_eq!(context.pending.len(), 1); - assert_eq!(peer, peer_d); - } - _ => panic!("Unexpected event"), - } - - // Peer D responds. - let providers = vec![provider4.clone().into()]; - context.register_response(peer_d, providers, vec![]); - - // Produces the result. - let event = context.next_action().unwrap(); - match event { - QueryAction::QuerySucceeded { query, .. } => { - assert_eq!(query, QueryId(0)); - } - _ => panic!("Unexpected event"), - } - - // Check results. - let found_providers = context.found_providers(); - assert_eq!(found_providers.len(), 4); - assert!(found_providers.contains(&provider1)); - assert!(found_providers.contains(&provider2)); - assert!(found_providers.contains(&provider3)); - assert!(found_providers.contains(&provider4)); - } - - #[test] - fn providers_sorted_by_distance() { - let target = Key::new(vec![1, 2, 3].into()); - - let mut peers = (0..10).map(|_| PeerId::random()).collect::>(); - let providers = peers.iter().map(|peer| peer_to_kad(*peer)).collect::>(); - - let found_providers = - GetProvidersContext::merge_and_sort_providers(providers, target.clone()); - - peers.sort_by(|p1, p2| { - Key::from(*p1).distance(&target).cmp(&Key::from(*p2).distance(&target)) - }); - - assert!( - std::iter::zip(found_providers.into_iter(), peers.into_iter()) - .all(|(provider, peer)| provider.peer == peer) - ); - } - - #[test] - fn provider_addresses_merged() { - let peer = PeerId::random(); - - let address1 = multiaddr!(Ip4([127, 0, 0, 1]), Tcp(10000u16)); - let address2 = multiaddr!(Ip4([192, 168, 0, 1]), Tcp(10000u16)); - let address3 = multiaddr!(Ip4([10, 0, 0, 1]), Tcp(10000u16)); - let address4 = multiaddr!(Ip4([1, 1, 1, 1]), Tcp(10000u16)); - let address5 = multiaddr!(Ip4([8, 8, 8, 8]), Tcp(10000u16)); - - let provider1 = peer_to_kad_with_addresses(peer, vec![address1.clone()]); - let provider2 = peer_to_kad_with_addresses( - peer, - vec![address2.clone(), address3.clone(), address4.clone()], - ); - let provider3 = peer_to_kad_with_addresses(peer, vec![address4.clone(), address5.clone()]); - - let providers = vec![provider1, provider2, provider3]; - - let found_providers = GetProvidersContext::merge_and_sort_providers( - providers, - Key::new(vec![1, 2, 3].into()), - ); - - assert_eq!(found_providers.len(), 1); - - let addresses = &found_providers.first().unwrap().addresses; - assert_eq!(addresses.len(), 5); - assert!(addresses.contains(&address1)); - assert!(addresses.contains(&address2)); - assert!(addresses.contains(&address3)); - assert!(addresses.contains(&address4)); - assert!(addresses.contains(&address5)); - } + use super::*; + use crate::protocol::libp2p::kademlia::types::ConnectionType; + use multiaddr::multiaddr; + + fn default_config() -> GetProvidersConfig { + GetProvidersConfig { + local_peer_id: PeerId::random(), + parallelism_factor: 3, + query: QueryId(0), + target: Key::new(vec![1, 2, 3].into()), + known_providers: vec![], + } + } + + fn peer_to_kad(peer: PeerId) -> KademliaPeer { + KademliaPeer { + peer, + key: Key::from(peer), + address_store: Default::default(), + connection: ConnectionType::NotConnected, + } + } + + fn peer_to_kad_with_addresses(peer: PeerId, addresses: Vec) -> KademliaPeer { + KademliaPeer::new(peer, addresses, ConnectionType::NotConnected) + } + + #[test] + fn completes_when_no_candidates() { + let config = default_config(); + + let mut context = GetProvidersContext::new(config, VecDeque::new()); + assert!(context.is_done()); + + let event = context.next_action().unwrap(); + match event { + QueryAction::QueryFailed { query, .. } => { + assert_eq!(query, QueryId(0)); + }, + _ => panic!("Unexpected event"), + } + } + + #[test] + fn fulfill_parallelism() { + let config = GetProvidersConfig { parallelism_factor: 3, ..default_config() }; + + let candidate_peer_set: HashSet<_> = + [PeerId::random(), PeerId::random(), PeerId::random()].into_iter().collect(); + assert_eq!(candidate_peer_set.len(), 3); + + let candidate_peers = candidate_peer_set.iter().map(|peer| peer_to_kad(*peer)).collect(); + let mut context = GetProvidersContext::new(config, candidate_peers); + + for num in 0..3 { + let event = context.next_action().unwrap(); + match event { + QueryAction::SendMessage { query, peer, .. } => { + assert_eq!(query, QueryId(0)); + // Added as pending. + assert_eq!(context.pending.len(), num + 1); + assert!(context.pending.contains_key(&peer)); + + // Check the peer is the one provided. + assert!(candidate_peer_set.contains(&peer)); + }, + _ => panic!("Unexpected event"), + } + } + + // Fulfilled parallelism. + assert!(context.next_action().is_none()); + } + + #[test] + fn completes_when_responses() { + let config = GetProvidersConfig { parallelism_factor: 3, ..default_config() }; + + let peer_a = PeerId::random(); + let peer_b = PeerId::random(); + let peer_c = PeerId::random(); + + let candidate_peer_set: HashSet<_> = [peer_a, peer_b, peer_c].into_iter().collect(); + assert_eq!(candidate_peer_set.len(), 3); + + let candidate_peers = + [peer_a, peer_b, peer_c].iter().map(|peer| peer_to_kad(*peer)).collect(); + let mut context = GetProvidersContext::new(config, candidate_peers); + + let [provider1, provider2, provider3, provider4] = (0..4) + .map(|_| ContentProvider { peer: PeerId::random(), addresses: vec![] }) + .collect::>() + .try_into() + .unwrap(); + + // Schedule peer queries. + for num in 0..3 { + let event = context.next_action().unwrap(); + match event { + QueryAction::SendMessage { query, peer, .. } => { + assert_eq!(query, QueryId(0)); + // Added as pending. + assert_eq!(context.pending.len(), num + 1); + assert!(context.pending.contains_key(&peer)); + + // Check the peer is the one provided. + assert!(candidate_peer_set.contains(&peer)); + }, + _ => panic!("Unexpected event"), + } + } + + // Checks a failed query that was not initiated. + let peer_d = PeerId::random(); + context.register_response_failure(peer_d); + assert_eq!(context.pending.len(), 3); + assert!(context.queried.is_empty()); + + // Provide responses back. + let providers = vec![provider1.clone().into(), provider2.clone().into()]; + context.register_response(peer_a, providers, vec![]); + assert_eq!(context.pending.len(), 2); + assert_eq!(context.queried.len(), 1); + assert_eq!(context.found_providers.len(), 2); + + // Provide different response from peer b with peer d as candidate. + let providers = vec![provider2.clone().into(), provider3.clone().into()]; + let candidates = vec![peer_to_kad(peer_d)]; + context.register_response(peer_b, providers, candidates); + assert_eq!(context.pending.len(), 1); + assert_eq!(context.queried.len(), 2); + assert_eq!(context.found_providers.len(), 4); + assert_eq!(context.candidates.len(), 1); + + // Peer C fails. + context.register_response_failure(peer_c); + assert!(context.pending.is_empty()); + assert_eq!(context.queried.len(), 3); + assert_eq!(context.found_providers.len(), 4); + + // Drain the last candidate. + let event = context.next_action().unwrap(); + match event { + QueryAction::SendMessage { query, peer, .. } => { + assert_eq!(query, QueryId(0)); + // Added as pending. + assert_eq!(context.pending.len(), 1); + assert_eq!(peer, peer_d); + }, + _ => panic!("Unexpected event"), + } + + // Peer D responds. + let providers = vec![provider4.clone().into()]; + context.register_response(peer_d, providers, vec![]); + + // Produces the result. + let event = context.next_action().unwrap(); + match event { + QueryAction::QuerySucceeded { query, .. } => { + assert_eq!(query, QueryId(0)); + }, + _ => panic!("Unexpected event"), + } + + // Check results. + let found_providers = context.found_providers(); + assert_eq!(found_providers.len(), 4); + assert!(found_providers.contains(&provider1)); + assert!(found_providers.contains(&provider2)); + assert!(found_providers.contains(&provider3)); + assert!(found_providers.contains(&provider4)); + } + + #[test] + fn providers_sorted_by_distance() { + let target = Key::new(vec![1, 2, 3].into()); + + let mut peers = (0..10).map(|_| PeerId::random()).collect::>(); + let providers = peers.iter().map(|peer| peer_to_kad(*peer)).collect::>(); + + let found_providers = + GetProvidersContext::merge_and_sort_providers(providers, target.clone()); + + peers.sort_by(|p1, p2| { + Key::from(*p1).distance(&target).cmp(&Key::from(*p2).distance(&target)) + }); + + assert!(std::iter::zip(found_providers.into_iter(), peers.into_iter()) + .all(|(provider, peer)| provider.peer == peer)); + } + + #[test] + fn provider_addresses_merged() { + let peer = PeerId::random(); + + let address1 = multiaddr!(Ip4([127, 0, 0, 1]), Tcp(10000u16)); + let address2 = multiaddr!(Ip4([192, 168, 0, 1]), Tcp(10000u16)); + let address3 = multiaddr!(Ip4([10, 0, 0, 1]), Tcp(10000u16)); + let address4 = multiaddr!(Ip4([1, 1, 1, 1]), Tcp(10000u16)); + let address5 = multiaddr!(Ip4([8, 8, 8, 8]), Tcp(10000u16)); + + let provider1 = peer_to_kad_with_addresses(peer, vec![address1.clone()]); + let provider2 = peer_to_kad_with_addresses( + peer, + vec![address2.clone(), address3.clone(), address4.clone()], + ); + let provider3 = peer_to_kad_with_addresses(peer, vec![address4.clone(), address5.clone()]); + + let providers = vec![provider1, provider2, provider3]; + + let found_providers = GetProvidersContext::merge_and_sort_providers( + providers, + Key::new(vec![1, 2, 3].into()), + ); + + assert_eq!(found_providers.len(), 1); + + let addresses = &found_providers.first().unwrap().addresses; + assert_eq!(addresses.len(), 5); + assert!(addresses.contains(&address1)); + assert!(addresses.contains(&address2)); + assert!(addresses.contains(&address3)); + assert!(addresses.contains(&address4)); + assert!(addresses.contains(&address5)); + } } diff --git a/client/litep2p/src/protocol/libp2p/kademlia/query/get_record.rs b/client/litep2p/src/protocol/libp2p/kademlia/query/get_record.rs index cc143efa..fea957b2 100644 --- a/client/litep2p/src/protocol/libp2p/kademlia/query/get_record.rs +++ b/client/litep2p/src/protocol/libp2p/kademlia/query/get_record.rs @@ -21,14 +21,14 @@ use bytes::Bytes; use crate::{ - protocol::libp2p::kademlia::{ - message::KademliaMessage, - query::{QueryAction, QueryId}, - record::{Key as RecordKey, PeerRecord, Record}, - types::{Distance, KademliaPeer, Key}, - Quorum, - }, - PeerId, + protocol::libp2p::kademlia::{ + message::KademliaMessage, + query::{QueryAction, QueryId}, + record::{Key as RecordKey, PeerRecord, Record}, + types::{Distance, KademliaPeer, Key}, + Quorum, + }, + PeerId, }; use std::collections::{BTreeMap, HashMap, HashSet, VecDeque}; @@ -39,575 +39,540 @@ const LOG_TARGET: &str = "litep2p::ipfs::kademlia::query::get_record"; /// The configuration needed to instantiate a new [`GetRecordContext`]. #[derive(Debug)] pub struct GetRecordConfig { - /// Local peer ID. - pub local_peer_id: PeerId, + /// Local peer ID. + pub local_peer_id: PeerId, - /// How many records we already know about (ie extracted from storage). - /// - /// This can either be 0 or 1 when the record is extracted local storage. - pub known_records: usize, + /// How many records we already know about (ie extracted from storage). + /// + /// This can either be 0 or 1 when the record is extracted local storage. + pub known_records: usize, - /// Quorum for the query. - pub quorum: Quorum, + /// Quorum for the query. + pub quorum: Quorum, - /// Replication factor. - pub replication_factor: usize, + /// Replication factor. + pub replication_factor: usize, - /// Parallelism factor. - pub parallelism_factor: usize, + /// Parallelism factor. + pub parallelism_factor: usize, - /// Query ID. - pub query: QueryId, + /// Query ID. + pub query: QueryId, - /// Target key. - pub target: Key, + /// Target key. + pub target: Key, } impl GetRecordConfig { - /// Checks if the found number of records meets the specified quorum. - /// - /// Used to determine if the query found enough records to stop. - fn sufficient_records(&self, records: usize) -> bool { - // The total number of known records is the sum of the records we knew about before starting - // the query and the records we found along the way. - let total_known = self.known_records + records; - - match self.quorum { - Quorum::All => total_known >= self.replication_factor, - Quorum::One => total_known >= 1, - Quorum::N(needed_responses) => total_known >= needed_responses.get(), - } - } + /// Checks if the found number of records meets the specified quorum. + /// + /// Used to determine if the query found enough records to stop. + fn sufficient_records(&self, records: usize) -> bool { + // The total number of known records is the sum of the records we knew about before starting + // the query and the records we found along the way. + let total_known = self.known_records + records; + + match self.quorum { + Quorum::All => total_known >= self.replication_factor, + Quorum::One => total_known >= 1, + Quorum::N(needed_responses) => total_known >= needed_responses.get(), + } + } } #[derive(Debug)] pub struct GetRecordContext { - /// Query immutable config. - pub config: GetRecordConfig, + /// Query immutable config. + pub config: GetRecordConfig, - /// Cached Kademlia message to send. - kad_message: Bytes, + /// Cached Kademlia message to send. + kad_message: Bytes, - /// Peers from whom the `QueryEngine` is waiting to hear a response. - pub pending: HashMap, + /// Peers from whom the `QueryEngine` is waiting to hear a response. + pub pending: HashMap, - /// Queried candidates. - /// - /// These are the peers for whom the query has already been sent - /// and who have either returned their closest peers or failed to answer. - pub queried: HashSet, + /// Queried candidates. + /// + /// These are the peers for whom the query has already been sent + /// and who have either returned their closest peers or failed to answer. + pub queried: HashSet, - /// Candidates. - pub candidates: BTreeMap, + /// Candidates. + pub candidates: BTreeMap, - /// Number of found records. - pub found_records: usize, + /// Number of found records. + pub found_records: usize, - /// Records to propagate as next query action. - pub records: VecDeque, + /// Records to propagate as next query action. + pub records: VecDeque, } impl GetRecordContext { - /// Create new [`GetRecordContext`]. - pub fn new( - config: GetRecordConfig, - in_peers: VecDeque, - local_record: bool, - ) -> Self { - let mut candidates = BTreeMap::new(); - - for candidate in &in_peers { - let distance = config.target.distance(&candidate.key); - candidates.insert(distance, candidate.clone()); - } - - let kad_message = KademliaMessage::get_record(config.target.clone().into_preimage()); - - Self { - config, - kad_message, - - candidates, - pending: HashMap::new(), - queried: HashSet::new(), - found_records: if local_record { 1 } else { 0 }, - records: VecDeque::new(), - } - } - - /// Register response failure for `peer`. - pub fn register_response_failure(&mut self, peer: PeerId) { - let Some(peer) = self.pending.remove(&peer) else { - tracing::debug!( - target: LOG_TARGET, - query = ?self.config.query, - ?peer, - "`GetRecordContext`: pending peer doesn't exist", - ); - return; - }; - - self.queried.insert(peer.peer); - } - - /// Register `GET_VALUE` response from `peer`. - /// - /// Returns some if the response should be propagated to the user. - pub fn register_response( - &mut self, - peer: PeerId, - record: Option, - peers: Vec, - ) { - tracing::trace!( - target: LOG_TARGET, - query = ?self.config.query, - ?peer, - "`GetRecordContext`: received response from peer", - ); - - let Some(peer) = self.pending.remove(&peer) else { - tracing::debug!( - target: LOG_TARGET, - query = ?self.config.query, - ?peer, - "`GetRecordContext`: received response from peer but didn't expect it", - ); - return; - }; - - if let Some(record) = record { - if !record.is_expired(std::time::Instant::now()) { - self.records.push_back(PeerRecord { - peer: peer.peer, - record, - }); - - self.found_records += 1; - } - } - - // Add the queried peer to `queried` and all new peers which haven't been - // queried to `candidates` - self.queried.insert(peer.peer); - - let to_query_candidate = peers.into_iter().filter_map(|peer| { - // Peer already produced a response. - if self.queried.contains(&peer.peer) { - return None; - } - - // Peer was queried, awaiting response. - if self.pending.contains_key(&peer.peer) { - return None; - } - - // Local node. - if self.config.local_peer_id == peer.peer { - return None; - } - - Some(peer) - }); - - for candidate in to_query_candidate { - let distance = self.config.target.distance(&candidate.key); - self.candidates.insert(distance, candidate); - } - } - - /// Register a failure of sending a `GET_VALUE` request to `peer`. - pub fn register_send_failure(&mut self, _peer: PeerId) { - // In case of a send failure, `register_response_failure` is called as well. - // Failure is handled there. - } - - /// Register a success of sending a `GET_VALUE` request to `peer`. - pub fn register_send_success(&mut self, _peer: PeerId) { - // `GET_VALUE` requests are compound request-response pairs of messages, - // so we handle final success/failure in `register_response`/`register_response_failure`. - } - - /// Get next action for `peer`. - // TODO: https://github.com/paritytech/litep2p/issues/40 remove this and store the next action to `PeerAction` - pub fn next_peer_action(&mut self, peer: &PeerId) -> Option { - self.pending.contains_key(peer).then_some(QueryAction::SendMessage { - query: self.config.query, - peer: *peer, - message: self.kad_message.clone(), - }) - } - - /// Schedule next peer for outbound `GET_VALUE` query. - fn schedule_next_peer(&mut self) -> Option { - tracing::trace!( - target: LOG_TARGET, - query = ?self.config.query, - "`GetRecordContext`: get next peer", - ); - - let (_, candidate) = self.candidates.pop_first()?; - let peer = candidate.peer; - - tracing::trace!( - target: LOG_TARGET, - query = ?self.config.query, - ?peer, - "`GetRecordContext`: current candidate", - ); - self.pending.insert(candidate.peer, candidate); - - Some(QueryAction::SendMessage { - query: self.config.query, - peer, - message: self.kad_message.clone(), - }) - } - - /// Check if the query cannot make any progress. - /// - /// Returns true when there are no pending responses and no candidates to query. - fn is_done(&self) -> bool { - self.pending.is_empty() && self.candidates.is_empty() - } - - /// Get next action for a `GET_VALUE` query. - pub fn next_action(&mut self) -> Option { - // Drain the records first. - if let Some(record) = self.records.pop_front() { - return Some(QueryAction::GetRecordPartialResult { - query_id: self.config.query, - record, - }); - } - - // These are the records we knew about before starting the query and - // the records we found along the way. - let known_records = self.config.known_records + self.found_records; - - // If we cannot make progress, return the final result. - // A query failed when we are not able to identify one single record. - if self.is_done() { - return if known_records == 0 { - Some(QueryAction::QueryFailed { - query: self.config.query, - }) - } else { - Some(QueryAction::QuerySucceeded { - query: self.config.query, - }) - }; - } - - // Check if enough records have been found - let sufficient_records = self.config.sufficient_records(self.found_records); - if sufficient_records { - return Some(QueryAction::QuerySucceeded { - query: self.config.query, - }); - } - - // At this point, we either have pending responses or candidates to query; and we need more - // records. Ensure we do not exceed the parallelism factor. - if self.pending.len() == self.config.parallelism_factor { - return None; - } - - self.schedule_next_peer() - } + /// Create new [`GetRecordContext`]. + pub fn new( + config: GetRecordConfig, + in_peers: VecDeque, + local_record: bool, + ) -> Self { + let mut candidates = BTreeMap::new(); + + for candidate in &in_peers { + let distance = config.target.distance(&candidate.key); + candidates.insert(distance, candidate.clone()); + } + + let kad_message = KademliaMessage::get_record(config.target.clone().into_preimage()); + + Self { + config, + kad_message, + + candidates, + pending: HashMap::new(), + queried: HashSet::new(), + found_records: if local_record { 1 } else { 0 }, + records: VecDeque::new(), + } + } + + /// Register response failure for `peer`. + pub fn register_response_failure(&mut self, peer: PeerId) { + let Some(peer) = self.pending.remove(&peer) else { + tracing::debug!( + target: LOG_TARGET, + query = ?self.config.query, + ?peer, + "`GetRecordContext`: pending peer doesn't exist", + ); + return; + }; + + self.queried.insert(peer.peer); + } + + /// Register `GET_VALUE` response from `peer`. + /// + /// Returns some if the response should be propagated to the user. + pub fn register_response( + &mut self, + peer: PeerId, + record: Option, + peers: Vec, + ) { + tracing::trace!( + target: LOG_TARGET, + query = ?self.config.query, + ?peer, + "`GetRecordContext`: received response from peer", + ); + + let Some(peer) = self.pending.remove(&peer) else { + tracing::debug!( + target: LOG_TARGET, + query = ?self.config.query, + ?peer, + "`GetRecordContext`: received response from peer but didn't expect it", + ); + return; + }; + + if let Some(record) = record { + if !record.is_expired(std::time::Instant::now()) { + self.records.push_back(PeerRecord { peer: peer.peer, record }); + + self.found_records += 1; + } + } + + // Add the queried peer to `queried` and all new peers which haven't been + // queried to `candidates` + self.queried.insert(peer.peer); + + let to_query_candidate = peers.into_iter().filter_map(|peer| { + // Peer already produced a response. + if self.queried.contains(&peer.peer) { + return None; + } + + // Peer was queried, awaiting response. + if self.pending.contains_key(&peer.peer) { + return None; + } + + // Local node. + if self.config.local_peer_id == peer.peer { + return None; + } + + Some(peer) + }); + + for candidate in to_query_candidate { + let distance = self.config.target.distance(&candidate.key); + self.candidates.insert(distance, candidate); + } + } + + /// Register a failure of sending a `GET_VALUE` request to `peer`. + pub fn register_send_failure(&mut self, _peer: PeerId) { + // In case of a send failure, `register_response_failure` is called as well. + // Failure is handled there. + } + + /// Register a success of sending a `GET_VALUE` request to `peer`. + pub fn register_send_success(&mut self, _peer: PeerId) { + // `GET_VALUE` requests are compound request-response pairs of messages, + // so we handle final success/failure in `register_response`/`register_response_failure`. + } + + /// Get next action for `peer`. + // TODO: https://github.com/paritytech/litep2p/issues/40 remove this and store the next action to `PeerAction` + pub fn next_peer_action(&mut self, peer: &PeerId) -> Option { + self.pending.contains_key(peer).then_some(QueryAction::SendMessage { + query: self.config.query, + peer: *peer, + message: self.kad_message.clone(), + }) + } + + /// Schedule next peer for outbound `GET_VALUE` query. + fn schedule_next_peer(&mut self) -> Option { + tracing::trace!( + target: LOG_TARGET, + query = ?self.config.query, + "`GetRecordContext`: get next peer", + ); + + let (_, candidate) = self.candidates.pop_first()?; + let peer = candidate.peer; + + tracing::trace!( + target: LOG_TARGET, + query = ?self.config.query, + ?peer, + "`GetRecordContext`: current candidate", + ); + self.pending.insert(candidate.peer, candidate); + + Some(QueryAction::SendMessage { + query: self.config.query, + peer, + message: self.kad_message.clone(), + }) + } + + /// Check if the query cannot make any progress. + /// + /// Returns true when there are no pending responses and no candidates to query. + fn is_done(&self) -> bool { + self.pending.is_empty() && self.candidates.is_empty() + } + + /// Get next action for a `GET_VALUE` query. + pub fn next_action(&mut self) -> Option { + // Drain the records first. + if let Some(record) = self.records.pop_front() { + return Some(QueryAction::GetRecordPartialResult { + query_id: self.config.query, + record, + }); + } + + // These are the records we knew about before starting the query and + // the records we found along the way. + let known_records = self.config.known_records + self.found_records; + + // If we cannot make progress, return the final result. + // A query failed when we are not able to identify one single record. + if self.is_done() { + return if known_records == 0 { + Some(QueryAction::QueryFailed { query: self.config.query }) + } else { + Some(QueryAction::QuerySucceeded { query: self.config.query }) + }; + } + + // Check if enough records have been found + let sufficient_records = self.config.sufficient_records(self.found_records); + if sufficient_records { + return Some(QueryAction::QuerySucceeded { query: self.config.query }); + } + + // At this point, we either have pending responses or candidates to query; and we need more + // records. Ensure we do not exceed the parallelism factor. + if self.pending.len() == self.config.parallelism_factor { + return None; + } + + self.schedule_next_peer() + } } #[cfg(test)] mod tests { - use super::*; - use crate::protocol::libp2p::kademlia::types::ConnectionType; - - fn default_config() -> GetRecordConfig { - GetRecordConfig { - local_peer_id: PeerId::random(), - quorum: Quorum::All, - known_records: 0, - replication_factor: 20, - parallelism_factor: 10, - query: QueryId(0), - target: Key::new(vec![1, 2, 3].into()), - } - } - - fn peer_to_kad(peer: PeerId) -> KademliaPeer { - KademliaPeer { - peer, - key: Key::from(peer), - address_store: Default::default(), - connection: ConnectionType::Connected, - } - } - - #[test] - fn config_check() { - // Quorum::All with no known records. - let config = GetRecordConfig { - quorum: Quorum::All, - known_records: 0, - replication_factor: 20, - ..default_config() - }; - assert!(config.sufficient_records(20)); - assert!(!config.sufficient_records(19)); - - // Quorum::All with 1 known records. - let config = GetRecordConfig { - quorum: Quorum::All, - known_records: 1, - replication_factor: 20, - ..default_config() - }; - assert!(config.sufficient_records(19)); - assert!(!config.sufficient_records(18)); - - // Quorum::One with no known records. - let config = GetRecordConfig { - quorum: Quorum::One, - known_records: 0, - ..default_config() - }; - assert!(config.sufficient_records(1)); - assert!(!config.sufficient_records(0)); - - // Quorum::One with known records. - let config = GetRecordConfig { - quorum: Quorum::One, - known_records: 1, - ..default_config() - }; - assert!(config.sufficient_records(1)); - assert!(config.sufficient_records(0)); - - // Quorum::N with no known records. - let config = GetRecordConfig { - quorum: Quorum::N(std::num::NonZeroUsize::new(10).expect("valid; qed")), - known_records: 0, - ..default_config() - }; - assert!(config.sufficient_records(10)); - assert!(!config.sufficient_records(9)); - - // Quorum::N with known records. - let config = GetRecordConfig { - quorum: Quorum::N(std::num::NonZeroUsize::new(10).expect("valid; qed")), - known_records: 1, - ..default_config() - }; - assert!(config.sufficient_records(9)); - assert!(!config.sufficient_records(8)); - } - - #[test] - fn completes_when_no_candidates() { - let config = default_config(); - let mut context = GetRecordContext::new(config, VecDeque::new(), false); - assert!(context.is_done()); - let event = context.next_action().unwrap(); - match event { - QueryAction::QueryFailed { query } => { - assert_eq!(query, QueryId(0)); - } - _ => panic!("Unexpected event"), - } - - let config = GetRecordConfig { - known_records: 1, - ..default_config() - }; - let mut context = GetRecordContext::new(config, VecDeque::new(), false); - assert!(context.is_done()); - let event = context.next_action().unwrap(); - match event { - QueryAction::QuerySucceeded { query } => { - assert_eq!(query, QueryId(0)); - } - _ => panic!("Unexpected event"), - } - } - - #[test] - fn fulfill_parallelism() { - let config = GetRecordConfig { - parallelism_factor: 3, - ..default_config() - }; - - let in_peers_set: HashSet<_> = - [PeerId::random(), PeerId::random(), PeerId::random()].into_iter().collect(); - assert_eq!(in_peers_set.len(), 3); - - let in_peers = in_peers_set.iter().map(|peer| peer_to_kad(*peer)).collect(); - let mut context = GetRecordContext::new(config, in_peers, false); - - for num in 0..3 { - let event = context.next_action().unwrap(); - match event { - QueryAction::SendMessage { query, peer, .. } => { - assert_eq!(query, QueryId(0)); - // Added as pending. - assert_eq!(context.pending.len(), num + 1); - assert!(context.pending.contains_key(&peer)); - - // Check the peer is the one provided. - assert!(in_peers_set.contains(&peer)); - } - _ => panic!("Unexpected event"), - } - } - - // Fulfilled parallelism. - assert!(context.next_action().is_none()); - } - - #[test] - fn completes_when_responses() { - let key = vec![1, 2, 3]; - let config = GetRecordConfig { - parallelism_factor: 3, - replication_factor: 3, - ..default_config() - }; - - let peer_a = PeerId::random(); - let peer_b = PeerId::random(); - let peer_c = PeerId::random(); - - let in_peers_set: HashSet<_> = [peer_a, peer_b, peer_c].into_iter().collect(); - assert_eq!(in_peers_set.len(), 3); - - let in_peers = [peer_a, peer_b, peer_c].iter().map(|peer| peer_to_kad(*peer)).collect(); - let mut context = GetRecordContext::new(config, in_peers, false); - - // Schedule peer queries. - for num in 0..3 { - let event = context.next_action().unwrap(); - match event { - QueryAction::SendMessage { query, peer, .. } => { - assert_eq!(query, QueryId(0)); - // Added as pending. - assert_eq!(context.pending.len(), num + 1); - assert!(context.pending.contains_key(&peer)); - - // Check the peer is the one provided. - assert!(in_peers_set.contains(&peer)); - } - _ => panic!("Unexpected event"), - } - } - - // Checks a failed query that was not initiated. - let peer_d = PeerId::random(); - context.register_response_failure(peer_d); - assert_eq!(context.pending.len(), 3); - assert!(context.queried.is_empty()); - - let mut found_records = Vec::new(); - // Provide responses back. - let record = Record::new(key.clone(), vec![1, 2, 3]); - context.register_response(peer_a, Some(record), vec![]); - // Check propagated action. - let record = context.next_action().unwrap(); - match record { - QueryAction::GetRecordPartialResult { query_id, record } => { - assert_eq!(query_id, QueryId(0)); - assert_eq!(record.peer, peer_a); - assert_eq!(record.record, Record::new(key.clone(), vec![1, 2, 3])); - - found_records.push(record); - } - _ => panic!("Unexpected event"), - } - - assert_eq!(context.pending.len(), 2); - assert_eq!(context.queried.len(), 1); - assert_eq!(context.found_records, 1); - - // Provide different response from peer b with peer d as candidate. - let record = Record::new(key.clone(), vec![4, 5, 6]); - context.register_response(peer_b, Some(record), vec![peer_to_kad(peer_d)]); - // Check propagated action. - let record = context.next_action().unwrap(); - match record { - QueryAction::GetRecordPartialResult { query_id, record } => { - assert_eq!(query_id, QueryId(0)); - assert_eq!(record.peer, peer_b); - assert_eq!(record.record, Record::new(key.clone(), vec![4, 5, 6])); - - found_records.push(record); - } - _ => panic!("Unexpected event"), - } - - assert_eq!(context.pending.len(), 1); - assert_eq!(context.queried.len(), 2); - assert_eq!(context.found_records, 2); - assert_eq!(context.candidates.len(), 1); - - // Peer C fails. - context.register_response_failure(peer_c); - assert!(context.pending.is_empty()); - assert_eq!(context.queried.len(), 3); - assert_eq!(context.found_records, 2); - - // Drain the last candidate. - let event = context.next_action().unwrap(); - match event { - QueryAction::SendMessage { query, peer, .. } => { - assert_eq!(query, QueryId(0)); - // Added as pending. - assert_eq!(context.pending.len(), 1); - assert_eq!(peer, peer_d); - } - _ => panic!("Unexpected event"), - } - - // Peer D responds. - let record = Record::new(key.clone(), vec![4, 5, 6]); - context.register_response(peer_d, Some(record), vec![]); - // Check propagated action. - let record = context.next_action().unwrap(); - match record { - QueryAction::GetRecordPartialResult { query_id, record } => { - assert_eq!(query_id, QueryId(0)); - assert_eq!(record.peer, peer_d); - assert_eq!(record.record, Record::new(key.clone(), vec![4, 5, 6])); - - found_records.push(record); - } - _ => panic!("Unexpected event"), - } - - // Produces the result. - let event = context.next_action().unwrap(); - match event { - QueryAction::QuerySucceeded { query } => { - assert_eq!(query, QueryId(0)); - } - _ => panic!("Unexpected event"), - } - - // Check results. - assert_eq!( - found_records, - vec![ - PeerRecord { - peer: peer_a, - record: Record::new(key.clone(), vec![1, 2, 3]), - }, - PeerRecord { - peer: peer_b, - record: Record::new(key.clone(), vec![4, 5, 6]), - }, - PeerRecord { - peer: peer_d, - record: Record::new(key.clone(), vec![4, 5, 6]), - }, - ] - ); - } + use super::*; + use crate::protocol::libp2p::kademlia::types::ConnectionType; + + fn default_config() -> GetRecordConfig { + GetRecordConfig { + local_peer_id: PeerId::random(), + quorum: Quorum::All, + known_records: 0, + replication_factor: 20, + parallelism_factor: 10, + query: QueryId(0), + target: Key::new(vec![1, 2, 3].into()), + } + } + + fn peer_to_kad(peer: PeerId) -> KademliaPeer { + KademliaPeer { + peer, + key: Key::from(peer), + address_store: Default::default(), + connection: ConnectionType::Connected, + } + } + + #[test] + fn config_check() { + // Quorum::All with no known records. + let config = GetRecordConfig { + quorum: Quorum::All, + known_records: 0, + replication_factor: 20, + ..default_config() + }; + assert!(config.sufficient_records(20)); + assert!(!config.sufficient_records(19)); + + // Quorum::All with 1 known records. + let config = GetRecordConfig { + quorum: Quorum::All, + known_records: 1, + replication_factor: 20, + ..default_config() + }; + assert!(config.sufficient_records(19)); + assert!(!config.sufficient_records(18)); + + // Quorum::One with no known records. + let config = GetRecordConfig { quorum: Quorum::One, known_records: 0, ..default_config() }; + assert!(config.sufficient_records(1)); + assert!(!config.sufficient_records(0)); + + // Quorum::One with known records. + let config = GetRecordConfig { quorum: Quorum::One, known_records: 1, ..default_config() }; + assert!(config.sufficient_records(1)); + assert!(config.sufficient_records(0)); + + // Quorum::N with no known records. + let config = GetRecordConfig { + quorum: Quorum::N(std::num::NonZeroUsize::new(10).expect("valid; qed")), + known_records: 0, + ..default_config() + }; + assert!(config.sufficient_records(10)); + assert!(!config.sufficient_records(9)); + + // Quorum::N with known records. + let config = GetRecordConfig { + quorum: Quorum::N(std::num::NonZeroUsize::new(10).expect("valid; qed")), + known_records: 1, + ..default_config() + }; + assert!(config.sufficient_records(9)); + assert!(!config.sufficient_records(8)); + } + + #[test] + fn completes_when_no_candidates() { + let config = default_config(); + let mut context = GetRecordContext::new(config, VecDeque::new(), false); + assert!(context.is_done()); + let event = context.next_action().unwrap(); + match event { + QueryAction::QueryFailed { query } => { + assert_eq!(query, QueryId(0)); + }, + _ => panic!("Unexpected event"), + } + + let config = GetRecordConfig { known_records: 1, ..default_config() }; + let mut context = GetRecordContext::new(config, VecDeque::new(), false); + assert!(context.is_done()); + let event = context.next_action().unwrap(); + match event { + QueryAction::QuerySucceeded { query } => { + assert_eq!(query, QueryId(0)); + }, + _ => panic!("Unexpected event"), + } + } + + #[test] + fn fulfill_parallelism() { + let config = GetRecordConfig { parallelism_factor: 3, ..default_config() }; + + let in_peers_set: HashSet<_> = + [PeerId::random(), PeerId::random(), PeerId::random()].into_iter().collect(); + assert_eq!(in_peers_set.len(), 3); + + let in_peers = in_peers_set.iter().map(|peer| peer_to_kad(*peer)).collect(); + let mut context = GetRecordContext::new(config, in_peers, false); + + for num in 0..3 { + let event = context.next_action().unwrap(); + match event { + QueryAction::SendMessage { query, peer, .. } => { + assert_eq!(query, QueryId(0)); + // Added as pending. + assert_eq!(context.pending.len(), num + 1); + assert!(context.pending.contains_key(&peer)); + + // Check the peer is the one provided. + assert!(in_peers_set.contains(&peer)); + }, + _ => panic!("Unexpected event"), + } + } + + // Fulfilled parallelism. + assert!(context.next_action().is_none()); + } + + #[test] + fn completes_when_responses() { + let key = vec![1, 2, 3]; + let config = + GetRecordConfig { parallelism_factor: 3, replication_factor: 3, ..default_config() }; + + let peer_a = PeerId::random(); + let peer_b = PeerId::random(); + let peer_c = PeerId::random(); + + let in_peers_set: HashSet<_> = [peer_a, peer_b, peer_c].into_iter().collect(); + assert_eq!(in_peers_set.len(), 3); + + let in_peers = [peer_a, peer_b, peer_c].iter().map(|peer| peer_to_kad(*peer)).collect(); + let mut context = GetRecordContext::new(config, in_peers, false); + + // Schedule peer queries. + for num in 0..3 { + let event = context.next_action().unwrap(); + match event { + QueryAction::SendMessage { query, peer, .. } => { + assert_eq!(query, QueryId(0)); + // Added as pending. + assert_eq!(context.pending.len(), num + 1); + assert!(context.pending.contains_key(&peer)); + + // Check the peer is the one provided. + assert!(in_peers_set.contains(&peer)); + }, + _ => panic!("Unexpected event"), + } + } + + // Checks a failed query that was not initiated. + let peer_d = PeerId::random(); + context.register_response_failure(peer_d); + assert_eq!(context.pending.len(), 3); + assert!(context.queried.is_empty()); + + let mut found_records = Vec::new(); + // Provide responses back. + let record = Record::new(key.clone(), vec![1, 2, 3]); + context.register_response(peer_a, Some(record), vec![]); + // Check propagated action. + let record = context.next_action().unwrap(); + match record { + QueryAction::GetRecordPartialResult { query_id, record } => { + assert_eq!(query_id, QueryId(0)); + assert_eq!(record.peer, peer_a); + assert_eq!(record.record, Record::new(key.clone(), vec![1, 2, 3])); + + found_records.push(record); + }, + _ => panic!("Unexpected event"), + } + + assert_eq!(context.pending.len(), 2); + assert_eq!(context.queried.len(), 1); + assert_eq!(context.found_records, 1); + + // Provide different response from peer b with peer d as candidate. + let record = Record::new(key.clone(), vec![4, 5, 6]); + context.register_response(peer_b, Some(record), vec![peer_to_kad(peer_d)]); + // Check propagated action. + let record = context.next_action().unwrap(); + match record { + QueryAction::GetRecordPartialResult { query_id, record } => { + assert_eq!(query_id, QueryId(0)); + assert_eq!(record.peer, peer_b); + assert_eq!(record.record, Record::new(key.clone(), vec![4, 5, 6])); + + found_records.push(record); + }, + _ => panic!("Unexpected event"), + } + + assert_eq!(context.pending.len(), 1); + assert_eq!(context.queried.len(), 2); + assert_eq!(context.found_records, 2); + assert_eq!(context.candidates.len(), 1); + + // Peer C fails. + context.register_response_failure(peer_c); + assert!(context.pending.is_empty()); + assert_eq!(context.queried.len(), 3); + assert_eq!(context.found_records, 2); + + // Drain the last candidate. + let event = context.next_action().unwrap(); + match event { + QueryAction::SendMessage { query, peer, .. } => { + assert_eq!(query, QueryId(0)); + // Added as pending. + assert_eq!(context.pending.len(), 1); + assert_eq!(peer, peer_d); + }, + _ => panic!("Unexpected event"), + } + + // Peer D responds. + let record = Record::new(key.clone(), vec![4, 5, 6]); + context.register_response(peer_d, Some(record), vec![]); + // Check propagated action. + let record = context.next_action().unwrap(); + match record { + QueryAction::GetRecordPartialResult { query_id, record } => { + assert_eq!(query_id, QueryId(0)); + assert_eq!(record.peer, peer_d); + assert_eq!(record.record, Record::new(key.clone(), vec![4, 5, 6])); + + found_records.push(record); + }, + _ => panic!("Unexpected event"), + } + + // Produces the result. + let event = context.next_action().unwrap(); + match event { + QueryAction::QuerySucceeded { query } => { + assert_eq!(query, QueryId(0)); + }, + _ => panic!("Unexpected event"), + } + + // Check results. + assert_eq!( + found_records, + vec![ + PeerRecord { peer: peer_a, record: Record::new(key.clone(), vec![1, 2, 3]) }, + PeerRecord { peer: peer_b, record: Record::new(key.clone(), vec![4, 5, 6]) }, + PeerRecord { peer: peer_d, record: Record::new(key.clone(), vec![4, 5, 6]) }, + ] + ); + } } diff --git a/client/litep2p/src/protocol/libp2p/kademlia/query/mod.rs b/client/litep2p/src/protocol/libp2p/kademlia/query/mod.rs index bf1e887c..220cba65 100644 --- a/client/litep2p/src/protocol/libp2p/kademlia/query/mod.rs +++ b/client/litep2p/src/protocol/libp2p/kademlia/query/mod.rs @@ -19,18 +19,18 @@ // DEALINGS IN THE SOFTWARE. use crate::{ - protocol::libp2p::kademlia::{ - message::KademliaMessage, - query::{ - find_node::{FindNodeConfig, FindNodeContext}, - get_providers::{GetProvidersConfig, GetProvidersContext}, - get_record::{GetRecordConfig, GetRecordContext}, - }, - record::{ContentProvider, Key as RecordKey, Record}, - types::{KademliaPeer, Key}, - PeerRecord, Quorum, - }, - PeerId, + protocol::libp2p::kademlia::{ + message::KademliaMessage, + query::{ + find_node::{FindNodeConfig, FindNodeContext}, + get_providers::{GetProvidersConfig, GetProvidersContext}, + get_record::{GetRecordConfig, GetRecordContext}, + }, + record::{ContentProvider, Key as RecordKey, Record}, + types::{KademliaPeer, Key}, + PeerRecord, Quorum, + }, + PeerId, }; use bytes::Bytes; @@ -56,2090 +56,1977 @@ pub struct QueryId(pub usize); /// Query type. #[derive(Debug)] enum QueryType { - /// `FIND_NODE` query. - FindNode { - /// Context for the `FIND_NODE` query. - context: FindNodeContext, - }, - - /// `PUT_VALUE` query. - PutRecord { - /// Record that needs to be stored. - record: Record, - - /// [`Quorum`] that needs to be reached for the query to succeed. - quorum: Quorum, - - /// Context for the `FIND_NODE` query. - context: FindNodeContext, - }, - - /// `PUT_VALUE` query to specified peers. - PutRecordToPeers { - /// Record that needs to be stored. - record: Record, - - /// [`Quorum`] that needs to be reached for the query to succeed. - quorum: Quorum, - - /// Context for finding peers. - context: FindManyNodesContext, - }, - - /// `PUT_VALUE` message sending phase. - PutRecordToFoundNodes { - /// Context for tracking `PUT_VALUE` responses. - context: PutToTargetPeersContext, - }, - - /// `GET_VALUE` query. - GetRecord { - /// Context for the `GET_VALUE` query. - context: GetRecordContext, - }, - - /// `ADD_PROVIDER` query. - AddProvider { - /// Provided key. - provided_key: RecordKey, - - /// Provider record that need to be stored. - provider: ContentProvider, - - /// [`Quorum`] that needs to be reached for the query to succeed. - quorum: Quorum, - - /// Context for the `FIND_NODE` query. - context: FindNodeContext, - }, - - /// `ADD_PROVIDER` message sending phase. - AddProviderToFoundNodes { - /// Context for tracking `ADD_PROVIDER` requests. - context: PutToTargetPeersContext, - }, - - /// `GET_PROVIDERS` query. - GetProviders { - /// Context for the `GET_PROVIDERS` query. - context: GetProvidersContext, - }, + /// `FIND_NODE` query. + FindNode { + /// Context for the `FIND_NODE` query. + context: FindNodeContext, + }, + + /// `PUT_VALUE` query. + PutRecord { + /// Record that needs to be stored. + record: Record, + + /// [`Quorum`] that needs to be reached for the query to succeed. + quorum: Quorum, + + /// Context for the `FIND_NODE` query. + context: FindNodeContext, + }, + + /// `PUT_VALUE` query to specified peers. + PutRecordToPeers { + /// Record that needs to be stored. + record: Record, + + /// [`Quorum`] that needs to be reached for the query to succeed. + quorum: Quorum, + + /// Context for finding peers. + context: FindManyNodesContext, + }, + + /// `PUT_VALUE` message sending phase. + PutRecordToFoundNodes { + /// Context for tracking `PUT_VALUE` responses. + context: PutToTargetPeersContext, + }, + + /// `GET_VALUE` query. + GetRecord { + /// Context for the `GET_VALUE` query. + context: GetRecordContext, + }, + + /// `ADD_PROVIDER` query. + AddProvider { + /// Provided key. + provided_key: RecordKey, + + /// Provider record that need to be stored. + provider: ContentProvider, + + /// [`Quorum`] that needs to be reached for the query to succeed. + quorum: Quorum, + + /// Context for the `FIND_NODE` query. + context: FindNodeContext, + }, + + /// `ADD_PROVIDER` message sending phase. + AddProviderToFoundNodes { + /// Context for tracking `ADD_PROVIDER` requests. + context: PutToTargetPeersContext, + }, + + /// `GET_PROVIDERS` query. + GetProviders { + /// Context for the `GET_PROVIDERS` query. + context: GetProvidersContext, + }, } /// Query action. #[derive(Debug)] pub enum QueryAction { - /// Send message to peer. - SendMessage { - /// Query ID. - query: QueryId, - - /// Peer. - peer: PeerId, - - /// Message. - message: Bytes, - }, - - /// `FIND_NODE` query succeeded. - FindNodeQuerySucceeded { - /// ID of the query that succeeded. - query: QueryId, - - /// Target peer. - target: PeerId, - - /// Peers that were found. - peers: Vec, - }, - - /// Store the record to nodes closest to target key. - PutRecordToFoundNodes { - /// Query ID of the original PUT_RECORD request. - query: QueryId, - - /// Record to store. - record: Record, - - /// Peers for whom the `PUT_VALUE` must be sent to. - peers: Vec, - - /// [`Quorum`] that needs to be reached for the query to succeed. - quorum: Quorum, - }, - - /// `PUT_VALUE` query succeeded. - PutRecordQuerySucceeded { - /// ID of the query that succeeded. - query: QueryId, - - /// Record key of the stored record. - key: RecordKey, - }, - - /// Add the provider record to nodes closest to the target key. - AddProviderToFoundNodes { - /// Query ID of the original ADD_PROVIDER request. - query: QueryId, - - /// Provided key. - provided_key: RecordKey, - - /// Provider record. - provider: ContentProvider, - - /// Peers for whom the `ADD_PROVIDER` must be sent to. - peers: Vec, - - /// [`Quorum`] that needs to be reached for the query to succeed. - quorum: Quorum, - }, - - /// `ADD_PROVIDER` query succeeded. - AddProviderQuerySucceeded { - /// ID of the query that succeeded. - query: QueryId, - - /// Provided key. - provided_key: RecordKey, - }, - - /// `GET_VALUE` query succeeded. - GetRecordQueryDone { - /// Query ID. - query_id: QueryId, - }, - - /// `GET_VALUE` inflight query produced a result. - /// - /// This event is emitted when a peer responds to the query with a record. - GetRecordPartialResult { - /// Query ID. - query_id: QueryId, - - /// Found record. - record: PeerRecord, - }, - - /// `GET_PROVIDERS` query succeeded. - GetProvidersQueryDone { - /// Query ID. - query_id: QueryId, - - /// Provided key. - provided_key: RecordKey, - - /// Found providers. - providers: Vec, - }, - - /// Query succeeded. - QuerySucceeded { - /// ID of the query that succeeded. - query: QueryId, - }, - - /// Query failed. - QueryFailed { - /// ID of the query that failed. - query: QueryId, - }, + /// Send message to peer. + SendMessage { + /// Query ID. + query: QueryId, + + /// Peer. + peer: PeerId, + + /// Message. + message: Bytes, + }, + + /// `FIND_NODE` query succeeded. + FindNodeQuerySucceeded { + /// ID of the query that succeeded. + query: QueryId, + + /// Target peer. + target: PeerId, + + /// Peers that were found. + peers: Vec, + }, + + /// Store the record to nodes closest to target key. + PutRecordToFoundNodes { + /// Query ID of the original PUT_RECORD request. + query: QueryId, + + /// Record to store. + record: Record, + + /// Peers for whom the `PUT_VALUE` must be sent to. + peers: Vec, + + /// [`Quorum`] that needs to be reached for the query to succeed. + quorum: Quorum, + }, + + /// `PUT_VALUE` query succeeded. + PutRecordQuerySucceeded { + /// ID of the query that succeeded. + query: QueryId, + + /// Record key of the stored record. + key: RecordKey, + }, + + /// Add the provider record to nodes closest to the target key. + AddProviderToFoundNodes { + /// Query ID of the original ADD_PROVIDER request. + query: QueryId, + + /// Provided key. + provided_key: RecordKey, + + /// Provider record. + provider: ContentProvider, + + /// Peers for whom the `ADD_PROVIDER` must be sent to. + peers: Vec, + + /// [`Quorum`] that needs to be reached for the query to succeed. + quorum: Quorum, + }, + + /// `ADD_PROVIDER` query succeeded. + AddProviderQuerySucceeded { + /// ID of the query that succeeded. + query: QueryId, + + /// Provided key. + provided_key: RecordKey, + }, + + /// `GET_VALUE` query succeeded. + GetRecordQueryDone { + /// Query ID. + query_id: QueryId, + }, + + /// `GET_VALUE` inflight query produced a result. + /// + /// This event is emitted when a peer responds to the query with a record. + GetRecordPartialResult { + /// Query ID. + query_id: QueryId, + + /// Found record. + record: PeerRecord, + }, + + /// `GET_PROVIDERS` query succeeded. + GetProvidersQueryDone { + /// Query ID. + query_id: QueryId, + + /// Provided key. + provided_key: RecordKey, + + /// Found providers. + providers: Vec, + }, + + /// Query succeeded. + QuerySucceeded { + /// ID of the query that succeeded. + query: QueryId, + }, + + /// Query failed. + QueryFailed { + /// ID of the query that failed. + query: QueryId, + }, } /// Kademlia query engine. pub struct QueryEngine { - /// Local peer ID. - local_peer_id: PeerId, + /// Local peer ID. + local_peer_id: PeerId, - /// Replication factor. - replication_factor: usize, + /// Replication factor. + replication_factor: usize, - /// Parallelism factor. - parallelism_factor: usize, + /// Parallelism factor. + parallelism_factor: usize, - /// Active queries. - queries: HashMap, + /// Active queries. + queries: HashMap, } impl QueryEngine { - /// Create new [`QueryEngine`]. - pub fn new( - local_peer_id: PeerId, - replication_factor: usize, - parallelism_factor: usize, - ) -> Self { - Self { - local_peer_id, - replication_factor, - parallelism_factor, - queries: HashMap::new(), - } - } - - /// Start `FIND_NODE` query. - pub fn start_find_node( - &mut self, - query_id: QueryId, - target: PeerId, - candidates: VecDeque, - ) -> QueryId { - tracing::debug!( - target: LOG_TARGET, - ?query_id, - ?target, - num_peers = ?candidates.len(), - "start `FIND_NODE` query" - ); - - let target = Key::from(target); - let config = FindNodeConfig { - local_peer_id: self.local_peer_id, - replication_factor: self.replication_factor, - parallelism_factor: self.parallelism_factor, - query: query_id, - target, - }; - - self.queries.insert( - query_id, - QueryType::FindNode { - context: FindNodeContext::new(config, candidates), - }, - ); - - query_id - } - - /// Start `PUT_VALUE` query. - pub fn start_put_record( - &mut self, - query_id: QueryId, - record: Record, - candidates: VecDeque, - quorum: Quorum, - ) -> QueryId { - tracing::debug!( - target: LOG_TARGET, - ?query_id, - target = ?record.key, - num_peers = ?candidates.len(), - "start `PUT_VALUE` query" - ); - - let target = Key::new(record.key.clone()); - let config = FindNodeConfig { - local_peer_id: self.local_peer_id, - replication_factor: self.replication_factor, - parallelism_factor: self.parallelism_factor, - query: query_id, - target, - }; - - self.queries.insert( - query_id, - QueryType::PutRecord { - record, - quorum, - context: FindNodeContext::new(config, candidates), - }, - ); - - query_id - } - - /// Start `PUT_VALUE` query to specified peers. - pub fn start_put_record_to_peers( - &mut self, - query_id: QueryId, - record: Record, - peers_to_report: Vec, - quorum: Quorum, - ) -> QueryId { - tracing::debug!( - target: LOG_TARGET, - ?query_id, - target = ?record.key, - num_peers = ?peers_to_report.len(), - "start `PUT_VALUE` query to peers" - ); - - self.queries.insert( - query_id, - QueryType::PutRecordToPeers { - record, - quorum, - context: FindManyNodesContext::new(query_id, peers_to_report), - }, - ); - - query_id - } - - /// Start `GET_VALUE` query. - pub fn start_get_record( - &mut self, - query_id: QueryId, - target: RecordKey, - candidates: VecDeque, - quorum: Quorum, - local_record: bool, - ) -> QueryId { - tracing::debug!( - target: LOG_TARGET, - ?query_id, - ?target, - num_peers = ?candidates.len(), - "start `GET_VALUE` query" - ); - - let target = Key::new(target); - let config = GetRecordConfig { - local_peer_id: self.local_peer_id, - known_records: if local_record { 1 } else { 0 }, - quorum, - replication_factor: self.replication_factor, - parallelism_factor: self.parallelism_factor, - query: query_id, - target, - }; - - self.queries.insert( - query_id, - QueryType::GetRecord { - context: GetRecordContext::new(config, candidates, local_record), - }, - ); - - query_id - } - - /// Start `ADD_PROVIDER` query. - pub fn start_add_provider( - &mut self, - query_id: QueryId, - provided_key: RecordKey, - provider: ContentProvider, - candidates: VecDeque, - quorum: Quorum, - ) -> QueryId { - tracing::debug!( - target: LOG_TARGET, - ?query_id, - ?provider, - num_peers = ?candidates.len(), - "start `ADD_PROVIDER` query", - ); - - let config = FindNodeConfig { - local_peer_id: self.local_peer_id, - replication_factor: self.replication_factor, - parallelism_factor: self.parallelism_factor, - query: query_id, - target: Key::new(provided_key.clone()), - }; - - self.queries.insert( - query_id, - QueryType::AddProvider { - provided_key, - provider, - quorum, - context: FindNodeContext::new(config, candidates), - }, - ); - - query_id - } - - /// Start `GET_PROVIDERS` query. - pub fn start_get_providers( - &mut self, - query_id: QueryId, - key: RecordKey, - candidates: VecDeque, - known_providers: Vec, - ) -> QueryId { - tracing::debug!( - target: LOG_TARGET, - ?query_id, - ?key, - num_peers = ?candidates.len(), - "start `GET_PROVIDERS` query", - ); - - let target = Key::new(key); - let config = GetProvidersConfig { - local_peer_id: self.local_peer_id, - parallelism_factor: self.parallelism_factor, - query: query_id, - target, - known_providers: known_providers.into_iter().map(Into::into).collect(), - }; - - self.queries.insert( - query_id, - QueryType::GetProviders { - context: GetProvidersContext::new(config, candidates), - }, - ); - - query_id - } - - /// Start `PUT_VALUE` requests tracking. - pub fn start_put_record_to_found_nodes_requests_tracking( - &mut self, - query_id: QueryId, - key: RecordKey, - peers: Vec, - quorum: Quorum, - ) { - tracing::debug!( - target: LOG_TARGET, - ?query_id, - num_peers = ?peers.len(), - "start `PUT_VALUE` responses tracking" - ); - - self.queries.insert( - query_id, - QueryType::PutRecordToFoundNodes { - context: PutToTargetPeersContext::new(query_id, key, peers, quorum), - }, - ); - } - - /// Start `ADD_PROVIDER` requests tracking. - pub fn start_add_provider_to_found_nodes_requests_tracking( - &mut self, - query_id: QueryId, - provided_key: RecordKey, - peers: Vec, - quorum: Quorum, - ) { - tracing::debug!( - target: LOG_TARGET, - ?query_id, - num_peers = ?peers.len(), - "start `ADD_PROVIDER` progress tracking" - ); - - self.queries.insert( - query_id, - QueryType::AddProviderToFoundNodes { - context: PutToTargetPeersContext::new(query_id, provided_key, peers, quorum), - }, - ); - } - - /// Register response failure from a queried peer. - pub fn register_response_failure(&mut self, query: QueryId, peer: PeerId) { - tracing::trace!(target: LOG_TARGET, ?query, ?peer, "register response failure"); - - match self.queries.get_mut(&query) { - None => { - tracing::trace!(target: LOG_TARGET, ?query, ?peer, "response failure for a stale query"); - } - Some(QueryType::FindNode { context }) => { - context.register_response_failure(peer); - } - Some(QueryType::PutRecord { context, .. }) => { - context.register_response_failure(peer); - } - Some(QueryType::PutRecordToPeers { context, .. }) => { - context.register_response_failure(peer); - } - Some(QueryType::PutRecordToFoundNodes { context }) => { - context.register_response_failure(peer); - } - Some(QueryType::GetRecord { context }) => { - context.register_response_failure(peer); - } - Some(QueryType::AddProvider { context, .. }) => { - context.register_response_failure(peer); - } - Some(QueryType::AddProviderToFoundNodes { context }) => { - context.register_response_failure(peer); - } - Some(QueryType::GetProviders { context }) => { - context.register_response_failure(peer); - } - } - } - - /// Register that `response` received from `peer`. - pub fn register_response(&mut self, query: QueryId, peer: PeerId, message: KademliaMessage) { - tracing::trace!(target: LOG_TARGET, ?query, ?peer, "register response"); - - match self.queries.get_mut(&query) { - None => { - tracing::trace!(target: LOG_TARGET, ?query, ?peer, "response for a stale query"); - } - Some(QueryType::FindNode { context }) => match message { - KademliaMessage::FindNode { peers, .. } => { - context.register_response(peer, peers); - } - message => { - tracing::debug!( - target: LOG_TARGET, - ?query, - ?peer, - "unexpected response to `FIND_NODE`: {message}", - ); - context.register_response_failure(peer); - } - }, - Some(QueryType::PutRecord { context, .. }) => match message { - KademliaMessage::FindNode { peers, .. } => { - context.register_response(peer, peers); - } - message => { - tracing::debug!( - target: LOG_TARGET, - ?query, - ?peer, - "unexpected response to `FIND_NODE` during `PUT_VALUE` query: {message}", - ); - context.register_response_failure(peer); - } - }, - Some(QueryType::PutRecordToPeers { context, .. }) => match message { - KademliaMessage::FindNode { peers, .. } => { - context.register_response(peer, peers); - } - message => { - tracing::debug!( - target: LOG_TARGET, - ?query, - ?peer, - "unexpected response to `FIND_NODE` during `PUT_VALUE` (to peers): {message}", - ); - context.register_response_failure(peer); - } - }, - Some(QueryType::PutRecordToFoundNodes { context }) => match message { - KademliaMessage::PutValue { .. } => { - context.register_response(peer); - } - message => { - tracing::debug!( - target: LOG_TARGET, - ?query, - ?peer, - "unexpected response to `PUT_VALUE`: {message}", - ); - context.register_response_failure(peer); - } - }, - Some(QueryType::GetRecord { context }) => match message { - KademliaMessage::GetRecord { record, peers, .. } => - context.register_response(peer, record, peers), - message => { - tracing::debug!( - target: LOG_TARGET, - ?query, - ?peer, - "unexpected response to `GET_VALUE`: {message}", - ); - context.register_response_failure(peer); - } - }, - Some(QueryType::AddProvider { context, .. }) => match message { - KademliaMessage::FindNode { peers, .. } => { - context.register_response(peer, peers); - } - message => { - tracing::debug!( - target: LOG_TARGET, - ?query, - ?peer, - "unexpected response to `FIND_NODE` during `ADD_PROVIDER` query: {message}", - ); - context.register_response_failure(peer); - } - }, - Some(QueryType::AddProviderToFoundNodes { context, .. }) => match message { - KademliaMessage::AddProvider { .. } => { - context.register_response(peer); - } - message => { - tracing::debug!( - target: LOG_TARGET, - ?query, - ?peer, - "unexpected response to `ADD_PROVIDER`: {message}", - ); - context.register_response_failure(peer); - } - }, - Some(QueryType::GetProviders { context }) => match message { - KademliaMessage::GetProviders { - key: _, - providers, - peers, - } => { - context.register_response(peer, providers, peers); - } - message => { - tracing::debug!( - target: LOG_TARGET, - ?query, - ?peer, - "unexpected response to `GET_PROVIDERS`: {message}", - ); - context.register_response_failure(peer); - } - }, - } - } - - pub fn register_send_failure(&mut self, query: QueryId, peer: PeerId) { - tracing::trace!(target: LOG_TARGET, ?query, ?peer, "register send failure"); - - match self.queries.get_mut(&query) { - None => { - tracing::trace!(target: LOG_TARGET, ?query, ?peer, "send failure for a stale query"); - } - Some(QueryType::FindNode { context }) => { - context.register_send_failure(peer); - } - Some(QueryType::PutRecord { context, .. }) => { - context.register_send_failure(peer); - } - Some(QueryType::PutRecordToPeers { context, .. }) => { - context.register_send_failure(peer); - } - Some(QueryType::PutRecordToFoundNodes { context }) => { - context.register_send_failure(peer); - } - Some(QueryType::GetRecord { context }) => { - context.register_send_failure(peer); - } - Some(QueryType::AddProvider { context, .. }) => { - context.register_send_failure(peer); - } - Some(QueryType::AddProviderToFoundNodes { context }) => { - context.register_send_failure(peer); - } - Some(QueryType::GetProviders { context }) => { - context.register_send_failure(peer); - } - } - } - - pub fn register_send_success(&mut self, query: QueryId, peer: PeerId) { - tracing::trace!(target: LOG_TARGET, ?query, ?peer, "register send success"); - - match self.queries.get_mut(&query) { - None => { - tracing::trace!(target: LOG_TARGET, ?query, ?peer, "send success for a stale query"); - } - Some(QueryType::FindNode { context }) => { - context.register_send_success(peer); - } - Some(QueryType::PutRecord { context, .. }) => { - context.register_send_success(peer); - } - Some(QueryType::PutRecordToPeers { context, .. }) => { - context.register_send_success(peer); - } - Some(QueryType::PutRecordToFoundNodes { context, .. }) => { - context.register_send_success(peer); - } - Some(QueryType::GetRecord { context }) => { - context.register_send_success(peer); - } - Some(QueryType::AddProvider { context, .. }) => { - context.register_send_success(peer); - } - Some(QueryType::AddProviderToFoundNodes { context, .. }) => { - context.register_send_success(peer); - } - Some(QueryType::GetProviders { context }) => { - context.register_send_success(peer); - } - } - } - - /// Register peer failure when it is not known whether sending or receiveiing failed. - /// This is called from [`super::Kademlia::disconnect_peer`]. - pub fn register_peer_failure(&mut self, query: QueryId, peer: PeerId) { - tracing::trace!(target: LOG_TARGET, ?query, ?peer, "register peer failure"); - - // Because currently queries track either send success/failure (`PUT_VALUE`, `ADD_PROVIDER`) - // or response success/failure (`FIND_NODE`, `GET_VALUE`, `GET_PROVIDERS`), - // but not both, we can just call both here and not propagate this different type of - // failure to specific queries knowing this will result in the correct behaviour. - self.register_send_failure(query, peer); - self.register_response_failure(query, peer); - } - - /// Get next action for `peer` from the [`QueryEngine`]. - pub fn next_peer_action(&mut self, query: &QueryId, peer: &PeerId) -> Option { - tracing::trace!(target: LOG_TARGET, ?query, ?peer, "get next peer action"); - - match self.queries.get_mut(query) { - None => { - tracing::trace!(target: LOG_TARGET, ?query, ?peer, "response failure for a stale query"); - None - } - Some(QueryType::FindNode { context }) => context.next_peer_action(peer), - Some(QueryType::PutRecord { context, .. }) => context.next_peer_action(peer), - Some(QueryType::PutRecordToPeers { context, .. }) => context.next_peer_action(peer), - Some(QueryType::GetRecord { context }) => context.next_peer_action(peer), - Some(QueryType::AddProvider { context, .. }) => context.next_peer_action(peer), - Some(QueryType::GetProviders { context }) => context.next_peer_action(peer), - Some(QueryType::PutRecordToFoundNodes { .. }) => { - // All `PUT_VALUE` requests were sent when initiating this query type. - None - } - Some(QueryType::AddProviderToFoundNodes { .. }) => { - // All `ADD_PROVIDER` requests were sent when initiating this query type. - None - } - } - } - - /// Handle query success by returning the queried value(s) - /// and removing the query from [`QueryEngine`]. - fn on_query_succeeded(&mut self, query: QueryId) -> QueryAction { - match self.queries.remove(&query).expect("query to exist") { - QueryType::FindNode { context } => QueryAction::FindNodeQuerySucceeded { - query, - target: context.config.target.into_preimage(), - peers: context.responses.into_values().collect::>(), - }, - QueryType::PutRecord { - record, - quorum, - context, - } => QueryAction::PutRecordToFoundNodes { - query: context.config.query, - record, - peers: context.responses.into_values().collect::>(), - quorum, - }, - QueryType::PutRecordToPeers { - record, - quorum, - context, - } => QueryAction::PutRecordToFoundNodes { - query: context.query, - record, - peers: context.peers_to_report, - quorum, - }, - QueryType::PutRecordToFoundNodes { context } => QueryAction::PutRecordQuerySucceeded { - query: context.query, - key: context.key, - }, - QueryType::GetRecord { context } => QueryAction::GetRecordQueryDone { - query_id: context.config.query, - }, - QueryType::AddProvider { - provided_key, - provider, - quorum, - context, - } => QueryAction::AddProviderToFoundNodes { - query: context.config.query, - provided_key, - provider, - peers: context.responses.into_values().collect::>(), - quorum, - }, - QueryType::AddProviderToFoundNodes { context } => - QueryAction::AddProviderQuerySucceeded { - query: context.query, - provided_key: context.key, - }, - QueryType::GetProviders { context } => QueryAction::GetProvidersQueryDone { - query_id: context.config.query, - provided_key: context.config.target.clone().into_preimage(), - providers: context.found_providers(), - }, - } - } - - /// Handle query failure by removing the query from [`QueryEngine`] and - /// returning the appropriate [`QueryAction`] to user. - fn on_query_failed(&mut self, query: QueryId) -> QueryAction { - let _ = self.queries.remove(&query).expect("query to exist"); - - QueryAction::QueryFailed { query } - } - - /// Get next action from the [`QueryEngine`]. - pub fn next_action(&mut self) -> Option { - for (_, state) in self.queries.iter_mut() { - let action = match state { - QueryType::FindNode { context } => context.next_action(), - QueryType::PutRecord { context, .. } => context.next_action(), - QueryType::PutRecordToPeers { context, .. } => context.next_action(), - QueryType::GetRecord { context } => context.next_action(), - QueryType::AddProvider { context, .. } => context.next_action(), - QueryType::GetProviders { context } => context.next_action(), - QueryType::PutRecordToFoundNodes { context, .. } => context.next_action(), - QueryType::AddProviderToFoundNodes { context, .. } => context.next_action(), - }; - - match action { - Some(QueryAction::QuerySucceeded { query }) => { - return Some(self.on_query_succeeded(query)); - } - Some(QueryAction::QueryFailed { query }) => - return Some(self.on_query_failed(query)), - Some(_) => return action, - _ => continue, - } - } - - None - } + /// Create new [`QueryEngine`]. + pub fn new( + local_peer_id: PeerId, + replication_factor: usize, + parallelism_factor: usize, + ) -> Self { + Self { local_peer_id, replication_factor, parallelism_factor, queries: HashMap::new() } + } + + /// Start `FIND_NODE` query. + pub fn start_find_node( + &mut self, + query_id: QueryId, + target: PeerId, + candidates: VecDeque, + ) -> QueryId { + tracing::debug!( + target: LOG_TARGET, + ?query_id, + ?target, + num_peers = ?candidates.len(), + "start `FIND_NODE` query" + ); + + let target = Key::from(target); + let config = FindNodeConfig { + local_peer_id: self.local_peer_id, + replication_factor: self.replication_factor, + parallelism_factor: self.parallelism_factor, + query: query_id, + target, + }; + + self.queries.insert( + query_id, + QueryType::FindNode { context: FindNodeContext::new(config, candidates) }, + ); + + query_id + } + + /// Start `PUT_VALUE` query. + pub fn start_put_record( + &mut self, + query_id: QueryId, + record: Record, + candidates: VecDeque, + quorum: Quorum, + ) -> QueryId { + tracing::debug!( + target: LOG_TARGET, + ?query_id, + target = ?record.key, + num_peers = ?candidates.len(), + "start `PUT_VALUE` query" + ); + + let target = Key::new(record.key.clone()); + let config = FindNodeConfig { + local_peer_id: self.local_peer_id, + replication_factor: self.replication_factor, + parallelism_factor: self.parallelism_factor, + query: query_id, + target, + }; + + self.queries.insert( + query_id, + QueryType::PutRecord { + record, + quorum, + context: FindNodeContext::new(config, candidates), + }, + ); + + query_id + } + + /// Start `PUT_VALUE` query to specified peers. + pub fn start_put_record_to_peers( + &mut self, + query_id: QueryId, + record: Record, + peers_to_report: Vec, + quorum: Quorum, + ) -> QueryId { + tracing::debug!( + target: LOG_TARGET, + ?query_id, + target = ?record.key, + num_peers = ?peers_to_report.len(), + "start `PUT_VALUE` query to peers" + ); + + self.queries.insert( + query_id, + QueryType::PutRecordToPeers { + record, + quorum, + context: FindManyNodesContext::new(query_id, peers_to_report), + }, + ); + + query_id + } + + /// Start `GET_VALUE` query. + pub fn start_get_record( + &mut self, + query_id: QueryId, + target: RecordKey, + candidates: VecDeque, + quorum: Quorum, + local_record: bool, + ) -> QueryId { + tracing::debug!( + target: LOG_TARGET, + ?query_id, + ?target, + num_peers = ?candidates.len(), + "start `GET_VALUE` query" + ); + + let target = Key::new(target); + let config = GetRecordConfig { + local_peer_id: self.local_peer_id, + known_records: if local_record { 1 } else { 0 }, + quorum, + replication_factor: self.replication_factor, + parallelism_factor: self.parallelism_factor, + query: query_id, + target, + }; + + self.queries.insert( + query_id, + QueryType::GetRecord { + context: GetRecordContext::new(config, candidates, local_record), + }, + ); + + query_id + } + + /// Start `ADD_PROVIDER` query. + pub fn start_add_provider( + &mut self, + query_id: QueryId, + provided_key: RecordKey, + provider: ContentProvider, + candidates: VecDeque, + quorum: Quorum, + ) -> QueryId { + tracing::debug!( + target: LOG_TARGET, + ?query_id, + ?provider, + num_peers = ?candidates.len(), + "start `ADD_PROVIDER` query", + ); + + let config = FindNodeConfig { + local_peer_id: self.local_peer_id, + replication_factor: self.replication_factor, + parallelism_factor: self.parallelism_factor, + query: query_id, + target: Key::new(provided_key.clone()), + }; + + self.queries.insert( + query_id, + QueryType::AddProvider { + provided_key, + provider, + quorum, + context: FindNodeContext::new(config, candidates), + }, + ); + + query_id + } + + /// Start `GET_PROVIDERS` query. + pub fn start_get_providers( + &mut self, + query_id: QueryId, + key: RecordKey, + candidates: VecDeque, + known_providers: Vec, + ) -> QueryId { + tracing::debug!( + target: LOG_TARGET, + ?query_id, + ?key, + num_peers = ?candidates.len(), + "start `GET_PROVIDERS` query", + ); + + let target = Key::new(key); + let config = GetProvidersConfig { + local_peer_id: self.local_peer_id, + parallelism_factor: self.parallelism_factor, + query: query_id, + target, + known_providers: known_providers.into_iter().map(Into::into).collect(), + }; + + self.queries.insert( + query_id, + QueryType::GetProviders { context: GetProvidersContext::new(config, candidates) }, + ); + + query_id + } + + /// Start `PUT_VALUE` requests tracking. + pub fn start_put_record_to_found_nodes_requests_tracking( + &mut self, + query_id: QueryId, + key: RecordKey, + peers: Vec, + quorum: Quorum, + ) { + tracing::debug!( + target: LOG_TARGET, + ?query_id, + num_peers = ?peers.len(), + "start `PUT_VALUE` responses tracking" + ); + + self.queries.insert( + query_id, + QueryType::PutRecordToFoundNodes { + context: PutToTargetPeersContext::new(query_id, key, peers, quorum), + }, + ); + } + + /// Start `ADD_PROVIDER` requests tracking. + pub fn start_add_provider_to_found_nodes_requests_tracking( + &mut self, + query_id: QueryId, + provided_key: RecordKey, + peers: Vec, + quorum: Quorum, + ) { + tracing::debug!( + target: LOG_TARGET, + ?query_id, + num_peers = ?peers.len(), + "start `ADD_PROVIDER` progress tracking" + ); + + self.queries.insert( + query_id, + QueryType::AddProviderToFoundNodes { + context: PutToTargetPeersContext::new(query_id, provided_key, peers, quorum), + }, + ); + } + + /// Register response failure from a queried peer. + pub fn register_response_failure(&mut self, query: QueryId, peer: PeerId) { + tracing::trace!(target: LOG_TARGET, ?query, ?peer, "register response failure"); + + match self.queries.get_mut(&query) { + None => { + tracing::trace!(target: LOG_TARGET, ?query, ?peer, "response failure for a stale query"); + }, + Some(QueryType::FindNode { context }) => { + context.register_response_failure(peer); + }, + Some(QueryType::PutRecord { context, .. }) => { + context.register_response_failure(peer); + }, + Some(QueryType::PutRecordToPeers { context, .. }) => { + context.register_response_failure(peer); + }, + Some(QueryType::PutRecordToFoundNodes { context }) => { + context.register_response_failure(peer); + }, + Some(QueryType::GetRecord { context }) => { + context.register_response_failure(peer); + }, + Some(QueryType::AddProvider { context, .. }) => { + context.register_response_failure(peer); + }, + Some(QueryType::AddProviderToFoundNodes { context }) => { + context.register_response_failure(peer); + }, + Some(QueryType::GetProviders { context }) => { + context.register_response_failure(peer); + }, + } + } + + /// Register that `response` received from `peer`. + pub fn register_response(&mut self, query: QueryId, peer: PeerId, message: KademliaMessage) { + tracing::trace!(target: LOG_TARGET, ?query, ?peer, "register response"); + + match self.queries.get_mut(&query) { + None => { + tracing::trace!(target: LOG_TARGET, ?query, ?peer, "response for a stale query"); + }, + Some(QueryType::FindNode { context }) => match message { + KademliaMessage::FindNode { peers, .. } => { + context.register_response(peer, peers); + }, + message => { + tracing::debug!( + target: LOG_TARGET, + ?query, + ?peer, + "unexpected response to `FIND_NODE`: {message}", + ); + context.register_response_failure(peer); + }, + }, + Some(QueryType::PutRecord { context, .. }) => match message { + KademliaMessage::FindNode { peers, .. } => { + context.register_response(peer, peers); + }, + message => { + tracing::debug!( + target: LOG_TARGET, + ?query, + ?peer, + "unexpected response to `FIND_NODE` during `PUT_VALUE` query: {message}", + ); + context.register_response_failure(peer); + }, + }, + Some(QueryType::PutRecordToPeers { context, .. }) => match message { + KademliaMessage::FindNode { peers, .. } => { + context.register_response(peer, peers); + }, + message => { + tracing::debug!( + target: LOG_TARGET, + ?query, + ?peer, + "unexpected response to `FIND_NODE` during `PUT_VALUE` (to peers): {message}", + ); + context.register_response_failure(peer); + }, + }, + Some(QueryType::PutRecordToFoundNodes { context }) => match message { + KademliaMessage::PutValue { .. } => { + context.register_response(peer); + }, + message => { + tracing::debug!( + target: LOG_TARGET, + ?query, + ?peer, + "unexpected response to `PUT_VALUE`: {message}", + ); + context.register_response_failure(peer); + }, + }, + Some(QueryType::GetRecord { context }) => match message { + KademliaMessage::GetRecord { record, peers, .. } => + context.register_response(peer, record, peers), + message => { + tracing::debug!( + target: LOG_TARGET, + ?query, + ?peer, + "unexpected response to `GET_VALUE`: {message}", + ); + context.register_response_failure(peer); + }, + }, + Some(QueryType::AddProvider { context, .. }) => match message { + KademliaMessage::FindNode { peers, .. } => { + context.register_response(peer, peers); + }, + message => { + tracing::debug!( + target: LOG_TARGET, + ?query, + ?peer, + "unexpected response to `FIND_NODE` during `ADD_PROVIDER` query: {message}", + ); + context.register_response_failure(peer); + }, + }, + Some(QueryType::AddProviderToFoundNodes { context, .. }) => match message { + KademliaMessage::AddProvider { .. } => { + context.register_response(peer); + }, + message => { + tracing::debug!( + target: LOG_TARGET, + ?query, + ?peer, + "unexpected response to `ADD_PROVIDER`: {message}", + ); + context.register_response_failure(peer); + }, + }, + Some(QueryType::GetProviders { context }) => match message { + KademliaMessage::GetProviders { key: _, providers, peers } => { + context.register_response(peer, providers, peers); + }, + message => { + tracing::debug!( + target: LOG_TARGET, + ?query, + ?peer, + "unexpected response to `GET_PROVIDERS`: {message}", + ); + context.register_response_failure(peer); + }, + }, + } + } + + pub fn register_send_failure(&mut self, query: QueryId, peer: PeerId) { + tracing::trace!(target: LOG_TARGET, ?query, ?peer, "register send failure"); + + match self.queries.get_mut(&query) { + None => { + tracing::trace!(target: LOG_TARGET, ?query, ?peer, "send failure for a stale query"); + }, + Some(QueryType::FindNode { context }) => { + context.register_send_failure(peer); + }, + Some(QueryType::PutRecord { context, .. }) => { + context.register_send_failure(peer); + }, + Some(QueryType::PutRecordToPeers { context, .. }) => { + context.register_send_failure(peer); + }, + Some(QueryType::PutRecordToFoundNodes { context }) => { + context.register_send_failure(peer); + }, + Some(QueryType::GetRecord { context }) => { + context.register_send_failure(peer); + }, + Some(QueryType::AddProvider { context, .. }) => { + context.register_send_failure(peer); + }, + Some(QueryType::AddProviderToFoundNodes { context }) => { + context.register_send_failure(peer); + }, + Some(QueryType::GetProviders { context }) => { + context.register_send_failure(peer); + }, + } + } + + pub fn register_send_success(&mut self, query: QueryId, peer: PeerId) { + tracing::trace!(target: LOG_TARGET, ?query, ?peer, "register send success"); + + match self.queries.get_mut(&query) { + None => { + tracing::trace!(target: LOG_TARGET, ?query, ?peer, "send success for a stale query"); + }, + Some(QueryType::FindNode { context }) => { + context.register_send_success(peer); + }, + Some(QueryType::PutRecord { context, .. }) => { + context.register_send_success(peer); + }, + Some(QueryType::PutRecordToPeers { context, .. }) => { + context.register_send_success(peer); + }, + Some(QueryType::PutRecordToFoundNodes { context, .. }) => { + context.register_send_success(peer); + }, + Some(QueryType::GetRecord { context }) => { + context.register_send_success(peer); + }, + Some(QueryType::AddProvider { context, .. }) => { + context.register_send_success(peer); + }, + Some(QueryType::AddProviderToFoundNodes { context, .. }) => { + context.register_send_success(peer); + }, + Some(QueryType::GetProviders { context }) => { + context.register_send_success(peer); + }, + } + } + + /// Register peer failure when it is not known whether sending or receiveiing failed. + /// This is called from [`super::Kademlia::disconnect_peer`]. + pub fn register_peer_failure(&mut self, query: QueryId, peer: PeerId) { + tracing::trace!(target: LOG_TARGET, ?query, ?peer, "register peer failure"); + + // Because currently queries track either send success/failure (`PUT_VALUE`, `ADD_PROVIDER`) + // or response success/failure (`FIND_NODE`, `GET_VALUE`, `GET_PROVIDERS`), + // but not both, we can just call both here and not propagate this different type of + // failure to specific queries knowing this will result in the correct behaviour. + self.register_send_failure(query, peer); + self.register_response_failure(query, peer); + } + + /// Get next action for `peer` from the [`QueryEngine`]. + pub fn next_peer_action(&mut self, query: &QueryId, peer: &PeerId) -> Option { + tracing::trace!(target: LOG_TARGET, ?query, ?peer, "get next peer action"); + + match self.queries.get_mut(query) { + None => { + tracing::trace!(target: LOG_TARGET, ?query, ?peer, "response failure for a stale query"); + None + }, + Some(QueryType::FindNode { context }) => context.next_peer_action(peer), + Some(QueryType::PutRecord { context, .. }) => context.next_peer_action(peer), + Some(QueryType::PutRecordToPeers { context, .. }) => context.next_peer_action(peer), + Some(QueryType::GetRecord { context }) => context.next_peer_action(peer), + Some(QueryType::AddProvider { context, .. }) => context.next_peer_action(peer), + Some(QueryType::GetProviders { context }) => context.next_peer_action(peer), + Some(QueryType::PutRecordToFoundNodes { .. }) => { + // All `PUT_VALUE` requests were sent when initiating this query type. + None + }, + Some(QueryType::AddProviderToFoundNodes { .. }) => { + // All `ADD_PROVIDER` requests were sent when initiating this query type. + None + }, + } + } + + /// Handle query success by returning the queried value(s) + /// and removing the query from [`QueryEngine`]. + fn on_query_succeeded(&mut self, query: QueryId) -> QueryAction { + match self.queries.remove(&query).expect("query to exist") { + QueryType::FindNode { context } => QueryAction::FindNodeQuerySucceeded { + query, + target: context.config.target.into_preimage(), + peers: context.responses.into_values().collect::>(), + }, + QueryType::PutRecord { record, quorum, context } => + QueryAction::PutRecordToFoundNodes { + query: context.config.query, + record, + peers: context.responses.into_values().collect::>(), + quorum, + }, + QueryType::PutRecordToPeers { record, quorum, context } => + QueryAction::PutRecordToFoundNodes { + query: context.query, + record, + peers: context.peers_to_report, + quorum, + }, + QueryType::PutRecordToFoundNodes { context } => + QueryAction::PutRecordQuerySucceeded { query: context.query, key: context.key }, + QueryType::GetRecord { context } => + QueryAction::GetRecordQueryDone { query_id: context.config.query }, + QueryType::AddProvider { provided_key, provider, quorum, context } => + QueryAction::AddProviderToFoundNodes { + query: context.config.query, + provided_key, + provider, + peers: context.responses.into_values().collect::>(), + quorum, + }, + QueryType::AddProviderToFoundNodes { context } => + QueryAction::AddProviderQuerySucceeded { + query: context.query, + provided_key: context.key, + }, + QueryType::GetProviders { context } => QueryAction::GetProvidersQueryDone { + query_id: context.config.query, + provided_key: context.config.target.clone().into_preimage(), + providers: context.found_providers(), + }, + } + } + + /// Handle query failure by removing the query from [`QueryEngine`] and + /// returning the appropriate [`QueryAction`] to user. + fn on_query_failed(&mut self, query: QueryId) -> QueryAction { + let _ = self.queries.remove(&query).expect("query to exist"); + + QueryAction::QueryFailed { query } + } + + /// Get next action from the [`QueryEngine`]. + pub fn next_action(&mut self) -> Option { + for (_, state) in self.queries.iter_mut() { + let action = match state { + QueryType::FindNode { context } => context.next_action(), + QueryType::PutRecord { context, .. } => context.next_action(), + QueryType::PutRecordToPeers { context, .. } => context.next_action(), + QueryType::GetRecord { context } => context.next_action(), + QueryType::AddProvider { context, .. } => context.next_action(), + QueryType::GetProviders { context } => context.next_action(), + QueryType::PutRecordToFoundNodes { context, .. } => context.next_action(), + QueryType::AddProviderToFoundNodes { context, .. } => context.next_action(), + }; + + match action { + Some(QueryAction::QuerySucceeded { query }) => { + return Some(self.on_query_succeeded(query)); + }, + Some(QueryAction::QueryFailed { query }) => + return Some(self.on_query_failed(query)), + Some(_) => return action, + _ => continue, + } + } + + None + } } #[cfg(test)] mod tests { - use multihash::{Code, Multihash}; - - use super::*; - use crate::protocol::libp2p::kademlia::types::ConnectionType; - - // make fixed peer id - fn make_peer_id(first: u8, second: u8) -> PeerId { - let mut peer_id = vec![0u8; 32]; - peer_id[0] = first; - peer_id[1] = second; - - PeerId::from_bytes( - &Multihash::wrap(Code::Identity.into(), &peer_id) - .expect("The digest size is never too large") - .to_bytes(), - ) - .unwrap() - } - - #[test] - fn find_node_query_fails() { - let _ = tracing_subscriber::fmt() - .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) - .try_init(); - - let mut engine = QueryEngine::new(PeerId::random(), 20usize, 3usize); - let target_peer = PeerId::random(); - let _target_key = Key::from(target_peer); - - let query = engine.start_find_node( - QueryId(1337), - target_peer, - vec![ - KademliaPeer::new(PeerId::random(), vec![], ConnectionType::NotConnected), - KademliaPeer::new(PeerId::random(), vec![], ConnectionType::NotConnected), - KademliaPeer::new(PeerId::random(), vec![], ConnectionType::NotConnected), - KademliaPeer::new(PeerId::random(), vec![], ConnectionType::NotConnected), - ] - .into(), - ); - - for _ in 0..4 { - if let Some(QueryAction::SendMessage { query, peer, .. }) = engine.next_action() { - engine.register_response_failure(query, peer); - } - } - - if let Some(QueryAction::QueryFailed { query: failed }) = engine.next_action() { - assert_eq!(failed, query); - } - - assert!(engine.next_action().is_none()); - } - - #[test] - fn find_node_lookup_paused() { - let mut engine = QueryEngine::new(PeerId::random(), 20usize, 3usize); - let target_peer = PeerId::random(); - let _target_key = Key::from(target_peer); - - let _ = engine.start_find_node( - QueryId(1338), - target_peer, - vec![ - KademliaPeer::new(PeerId::random(), vec![], ConnectionType::NotConnected), - KademliaPeer::new(PeerId::random(), vec![], ConnectionType::NotConnected), - KademliaPeer::new(PeerId::random(), vec![], ConnectionType::NotConnected), - KademliaPeer::new(PeerId::random(), vec![], ConnectionType::NotConnected), - ] - .into(), - ); - - for _ in 0..3 { - let _ = engine.next_action(); - } - - assert!(engine.next_action().is_none()); - } - - #[test] - fn find_node_query_succeeds() { - let _ = tracing_subscriber::fmt() - .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) - .try_init(); - - let mut engine = QueryEngine::new(PeerId::random(), 20usize, 3usize); - let target_peer = make_peer_id(0, 0); - let target_key = Key::from(target_peer); - - let distances = { - let mut distances = std::collections::BTreeMap::new(); - - for i in 1..64 { - let peer = make_peer_id(i, 0); - let key = Key::from(peer); - - distances.insert(target_key.distance(&key), peer); - } - - distances - }; - let mut iter = distances.iter(); - - // start find node with one known peer - let _query = engine.start_find_node( - QueryId(1339), - target_peer, - vec![KademliaPeer::new( - *iter.next().unwrap().1, - vec![], - ConnectionType::NotConnected, - )] - .into(), - ); - - let action = engine.next_action(); - assert!(engine.next_action().is_none()); - - // the one known peer responds with 3 other peers it knows - match action { - Some(QueryAction::SendMessage { query, peer, .. }) => { - engine.register_response( - query, - peer, - KademliaMessage::FindNode { - target: Vec::new(), - peers: vec![ - KademliaPeer::new( - *iter.next().unwrap().1, - vec![], - ConnectionType::NotConnected, - ), - KademliaPeer::new( - *iter.next().unwrap().1, - vec![], - ConnectionType::NotConnected, - ), - KademliaPeer::new( - *iter.next().unwrap().1, - vec![], - ConnectionType::NotConnected, - ), - ], - }, - ); - } - _ => panic!("invalid event received"), - } - - // send empty response for the last three nodes - for _ in 0..3 { - match engine.next_action() { - Some(QueryAction::SendMessage { query, peer, .. }) => { - println!("next send message to {peer:?}"); - engine.register_response( - query, - peer, - KademliaMessage::FindNode { - target: Vec::new(), - peers: vec![], - }, - ); - } - _ => panic!("invalid event received"), - } - } - - match engine.next_action() { - Some(QueryAction::FindNodeQuerySucceeded { peers, .. }) => { - assert_eq!(peers.len(), 4); - } - _ => panic!("invalid event received"), - } - - assert!(engine.next_action().is_none()); - } - - #[test] - fn put_record_fails() { - let _ = tracing_subscriber::fmt() - .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) - .try_init(); - - let mut engine = QueryEngine::new(PeerId::random(), 20usize, 3usize); - let record_key = RecordKey::new(&vec![1, 2, 3, 4]); - let target_key = Key::new(record_key.clone()); - let original_record = Record::new(record_key.clone(), vec![1, 3, 3, 7, 1, 3, 3, 8]); - - let distances = { - let mut distances = std::collections::BTreeMap::new(); - - for i in 1..64 { - let peer = make_peer_id(i, 0); - let key = Key::from(peer); - - distances.insert(target_key.distance(&key), peer); - } - - distances - }; - let mut iter = distances.iter(); - - // start find node with one known peer - let original_query_id = QueryId(1340); - let _query = engine.start_put_record( - original_query_id, - original_record.clone(), - vec![KademliaPeer::new( - *iter.next().unwrap().1, - vec![], - ConnectionType::NotConnected, - )] - .into(), - Quorum::All, - ); - - let action = engine.next_action(); - assert!(engine.next_action().is_none()); - - // the one known peer responds with 3 other peers it knows - match action { - Some(QueryAction::SendMessage { query, peer, .. }) => { - engine.register_response( - query, - peer, - KademliaMessage::FindNode { - target: Vec::new(), - peers: vec![ - KademliaPeer::new( - *iter.next().unwrap().1, - vec![], - ConnectionType::NotConnected, - ), - KademliaPeer::new( - *iter.next().unwrap().1, - vec![], - ConnectionType::NotConnected, - ), - KademliaPeer::new( - *iter.next().unwrap().1, - vec![], - ConnectionType::NotConnected, - ), - ], - }, - ); - } - _ => panic!("invalid event received"), - } - - // send empty response for the last three nodes - for _ in 0..3 { - match engine.next_action() { - Some(QueryAction::SendMessage { query, peer, .. }) => { - println!("next send message to {peer:?}"); - engine.register_response( - query, - peer, - KademliaMessage::FindNode { - target: Vec::new(), - peers: vec![], - }, - ); - } - _ => panic!("invalid event received"), - } - } - - let mut peers = match engine.next_action() { - Some(QueryAction::PutRecordToFoundNodes { - query, - peers, - record, - quorum, - }) => { - assert_eq!(query, original_query_id); - assert_eq!(peers.len(), 4); - assert_eq!(record.key, original_record.key); - assert_eq!(record.value, original_record.value); - assert!(matches!(quorum, Quorum::All)); - - peers - } - _ => panic!("invalid event received"), - }; - - engine.start_put_record_to_found_nodes_requests_tracking( - original_query_id, - record_key.clone(), - peers.iter().map(|p| p.peer).collect(), - Quorum::All, - ); - - // sends to all but one peer succeed - let last_peer = peers.pop().unwrap(); - for peer in peers { - engine.register_send_success(original_query_id, peer.peer); - } - engine.register_send_failure(original_query_id, last_peer.peer); - - match engine.next_action() { - Some(QueryAction::QueryFailed { query }) => { - assert_eq!(query, original_query_id); - } - _ => panic!("invalid event received"), - } - - assert!(engine.next_action().is_none()); - } - - #[test] - fn put_record_succeeds() { - let _ = tracing_subscriber::fmt() - .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) - .try_init(); - - let mut engine = QueryEngine::new(PeerId::random(), 20usize, 3usize); - let record_key = RecordKey::new(&vec![1, 2, 3, 4]); - let target_key = Key::new(record_key.clone()); - let original_record = Record::new(record_key.clone(), vec![1, 3, 3, 7, 1, 3, 3, 8]); - - let distances = { - let mut distances = std::collections::BTreeMap::new(); - - for i in 1..64 { - let peer = make_peer_id(i, 0); - let key = Key::from(peer); - - distances.insert(target_key.distance(&key), peer); - } - - distances - }; - let mut iter = distances.iter(); - - // start find node with one known peer - let original_query_id = QueryId(1340); - let _query = engine.start_put_record( - original_query_id, - original_record.clone(), - vec![KademliaPeer::new( - *iter.next().unwrap().1, - vec![], - ConnectionType::NotConnected, - )] - .into(), - Quorum::All, - ); - - let action = engine.next_action(); - assert!(engine.next_action().is_none()); - - // the one known peer responds with 3 other peers it knows - match action { - Some(QueryAction::SendMessage { query, peer, .. }) => { - engine.register_response( - query, - peer, - KademliaMessage::FindNode { - target: Vec::new(), - peers: vec![ - KademliaPeer::new( - *iter.next().unwrap().1, - vec![], - ConnectionType::NotConnected, - ), - KademliaPeer::new( - *iter.next().unwrap().1, - vec![], - ConnectionType::NotConnected, - ), - KademliaPeer::new( - *iter.next().unwrap().1, - vec![], - ConnectionType::NotConnected, - ), - ], - }, - ); - } - _ => panic!("invalid event received"), - } - - // send empty response for the last three nodes - for _ in 0..3 { - match engine.next_action() { - Some(QueryAction::SendMessage { query, peer, .. }) => { - println!("next send message to {peer:?}"); - engine.register_response( - query, - peer, - KademliaMessage::FindNode { - target: Vec::new(), - peers: vec![], - }, - ); - } - _ => panic!("invalid event received"), - } - } - - let peers = match engine.next_action() { - Some(QueryAction::PutRecordToFoundNodes { - query, - peers, - record, - quorum, - }) => { - assert_eq!(query, original_query_id); - assert_eq!(peers.len(), 4); - assert_eq!(record.key, original_record.key); - assert_eq!(record.value, original_record.value); - assert!(matches!(quorum, Quorum::All)); - - peers - } - _ => panic!("invalid event received"), - }; - - engine.start_put_record_to_found_nodes_requests_tracking( - original_query_id, - record_key.clone(), - peers.iter().map(|p| p.peer).collect(), - Quorum::All, - ); - - // simulate successful sends to all peers - for peer in &peers { - engine.register_send_success(original_query_id, peer.peer); - } - - match engine.next_action() { - Some(QueryAction::PutRecordQuerySucceeded { query, key }) => { - assert_eq!(query, original_query_id); - assert_eq!(key, record_key); - } - _ => panic!("invalid event received"), - } - - assert!(engine.next_action().is_none()); - - // get records from those peers. - let _query = engine.start_get_record( - QueryId(1341), - record_key.clone(), - vec![ - KademliaPeer::new(peers[0].peer, vec![], ConnectionType::NotConnected), - KademliaPeer::new(peers[1].peer, vec![], ConnectionType::NotConnected), - KademliaPeer::new(peers[2].peer, vec![], ConnectionType::NotConnected), - KademliaPeer::new(peers[3].peer, vec![], ConnectionType::NotConnected), - ] - .into(), - Quorum::All, - false, - ); - - let mut records = Vec::new(); - for _ in 0..4 { - match engine.next_action() { - Some(QueryAction::SendMessage { query, peer, .. }) => { - assert_eq!(query, QueryId(1341)); - engine.register_response( - query, - peer, - KademliaMessage::GetRecord { - record: Some(original_record.clone()), - peers: vec![], - key: Some(record_key.clone()), - }, - ); - } - event => panic!("invalid event received {:?}", event), - } - - // GetRecordPartialResult is emitted after the `register_response` if the record is - // valid. - match engine.next_action() { - Some(QueryAction::GetRecordPartialResult { query_id, record }) => { - println!("Partial result {:?}", record); - assert_eq!(query_id, QueryId(1341)); - records.push(record); - } - event => panic!("invalid event received {:?}", event), - } - } - - let peers: std::collections::HashSet<_> = peers.into_iter().map(|p| p.peer).collect(); - match engine.next_action() { - Some(QueryAction::GetRecordQueryDone { .. }) => { - println!("Records {:?}", records); - let query_peers = records - .iter() - .map(|peer_record| peer_record.peer) - .collect::>(); - assert_eq!(peers, query_peers); - - let records: std::collections::HashSet<_> = - records.into_iter().map(|peer_record| peer_record.record).collect(); - // One single record found across peers. - assert_eq!(records.len(), 1); - let record = records.into_iter().next().unwrap(); - - assert_eq!(record.key, original_record.key); - assert_eq!(record.value, original_record.value); - } - event => panic!("invalid event received {:?}", event), - } - } - - #[test] - fn put_record_succeeds_with_quorum_one() { - let _ = tracing_subscriber::fmt() - .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) - .try_init(); - - let mut engine = QueryEngine::new(PeerId::random(), 20usize, 3usize); - let record_key = RecordKey::new(&vec![1, 2, 3, 4]); - let target_key = Key::new(record_key.clone()); - let original_record = Record::new(record_key.clone(), vec![1, 3, 3, 7, 1, 3, 3, 8]); - - let distances = { - let mut distances = std::collections::BTreeMap::new(); - - for i in 1..64 { - let peer = make_peer_id(i, 0); - let key = Key::from(peer); - - distances.insert(target_key.distance(&key), peer); - } - - distances - }; - let mut iter = distances.iter(); - - // start find node with one known peer - let original_query_id = QueryId(1340); - let _query = engine.start_put_record( - original_query_id, - original_record.clone(), - vec![KademliaPeer::new( - *iter.next().unwrap().1, - vec![], - ConnectionType::NotConnected, - )] - .into(), - Quorum::One, - ); - - let action = engine.next_action(); - assert!(engine.next_action().is_none()); - - // the one known peer responds with 3 other peers it knows - match action { - Some(QueryAction::SendMessage { query, peer, .. }) => { - engine.register_response( - query, - peer, - KademliaMessage::FindNode { - target: Vec::new(), - peers: vec![ - KademliaPeer::new( - *iter.next().unwrap().1, - vec![], - ConnectionType::NotConnected, - ), - KademliaPeer::new( - *iter.next().unwrap().1, - vec![], - ConnectionType::NotConnected, - ), - KademliaPeer::new( - *iter.next().unwrap().1, - vec![], - ConnectionType::NotConnected, - ), - ], - }, - ); - } - _ => panic!("invalid event received"), - } - - // send empty response for the last three nodes - for _ in 0..3 { - match engine.next_action() { - Some(QueryAction::SendMessage { query, peer, .. }) => { - println!("next send message to {peer:?}"); - engine.register_response( - query, - peer, - KademliaMessage::FindNode { - target: Vec::new(), - peers: vec![], - }, - ); - } - _ => panic!("invalid event received"), - } - } - - let peers = match engine.next_action() { - Some(QueryAction::PutRecordToFoundNodes { - query, - peers, - record, - quorum, - }) => { - assert_eq!(query, original_query_id); - assert_eq!(peers.len(), 4); - assert_eq!(record.key, original_record.key); - assert_eq!(record.value, original_record.value); - assert!(matches!(quorum, Quorum::One)); - - peers - } - _ => panic!("invalid event received"), - }; - - engine.start_put_record_to_found_nodes_requests_tracking( - original_query_id, - record_key.clone(), - peers.iter().map(|p| p.peer).collect(), - Quorum::One, - ); - - // all but one peer fail - assert!(peers.len() > 1); - for peer in peers.iter().take(peers.len() - 1) { - engine.register_send_failure(original_query_id, peer.peer); - } - engine.register_send_success(original_query_id, peers.last().unwrap().peer); - - match engine.next_action() { - Some(QueryAction::PutRecordQuerySucceeded { query, key }) => { - assert_eq!(query, original_query_id); - assert_eq!(key, record_key); - } - _ => panic!("invalid event received"), - } - - assert!(engine.next_action().is_none()); - - // get records from those peers. - let _query = engine.start_get_record( - QueryId(1341), - record_key.clone(), - vec![ - KademliaPeer::new(peers[0].peer, vec![], ConnectionType::NotConnected), - KademliaPeer::new(peers[1].peer, vec![], ConnectionType::NotConnected), - KademliaPeer::new(peers[2].peer, vec![], ConnectionType::NotConnected), - KademliaPeer::new(peers[3].peer, vec![], ConnectionType::NotConnected), - ] - .into(), - Quorum::All, - false, - ); - - let mut records = Vec::new(); - for _ in 0..4 { - match engine.next_action() { - Some(QueryAction::SendMessage { query, peer, .. }) => { - assert_eq!(query, QueryId(1341)); - engine.register_response( - query, - peer, - KademliaMessage::GetRecord { - record: Some(original_record.clone()), - peers: vec![], - key: Some(record_key.clone()), - }, - ); - } - event => panic!("invalid event received {:?}", event), - } - - // GetRecordPartialResult is emitted after the `register_response` if the record is - // valid. - match engine.next_action() { - Some(QueryAction::GetRecordPartialResult { query_id, record }) => { - println!("Partial result {:?}", record); - assert_eq!(query_id, QueryId(1341)); - records.push(record); - } - event => panic!("invalid event received {:?}", event), - } - } - - let peers: std::collections::HashSet<_> = peers.into_iter().map(|p| p.peer).collect(); - match engine.next_action() { - Some(QueryAction::GetRecordQueryDone { .. }) => { - println!("Records {:?}", records); - let query_peers = records - .iter() - .map(|peer_record| peer_record.peer) - .collect::>(); - assert_eq!(peers, query_peers); - - let records: std::collections::HashSet<_> = - records.into_iter().map(|peer_record| peer_record.record).collect(); - // One single record found across peers. - assert_eq!(records.len(), 1); - let record = records.into_iter().next().unwrap(); - - assert_eq!(record.key, original_record.key); - assert_eq!(record.value, original_record.value); - } - event => panic!("invalid event received {:?}", event), - } - } - - #[test] - fn add_provider_fails() { - let _ = tracing_subscriber::fmt() - .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) - .try_init(); - - let local_peer_id = PeerId::random(); - let mut engine = QueryEngine::new(local_peer_id, 20usize, 3usize); - let original_provided_key = RecordKey::new(&vec![1, 2, 3, 4]); - let local_content_provider = ContentProvider { - peer: local_peer_id, - addresses: vec![], - }; - let target_key = Key::new(original_provided_key.clone()); - - let distances = { - let mut distances = std::collections::BTreeMap::new(); - - for i in 1..64 { - let peer = make_peer_id(i, 0); - let key = Key::from(peer); - - distances.insert(target_key.distance(&key), peer); - } - - distances - }; - let mut iter = distances.iter(); - - // start add provider with one known peer - let original_query_id = QueryId(1340); - let _query = engine.start_add_provider( - original_query_id, - original_provided_key.clone(), - local_content_provider.clone(), - vec![KademliaPeer::new( - *iter.next().unwrap().1, - vec![], - ConnectionType::NotConnected, - )] - .into(), - Quorum::All, - ); - - let action = engine.next_action(); - assert!(engine.next_action().is_none()); - - // the one known peer responds with 3 other peers it knows - match action { - Some(QueryAction::SendMessage { query, peer, .. }) => { - engine.register_response( - query, - peer, - KademliaMessage::FindNode { - target: Vec::new(), - peers: vec![ - KademliaPeer::new( - *iter.next().unwrap().1, - vec![], - ConnectionType::NotConnected, - ), - KademliaPeer::new( - *iter.next().unwrap().1, - vec![], - ConnectionType::NotConnected, - ), - KademliaPeer::new( - *iter.next().unwrap().1, - vec![], - ConnectionType::NotConnected, - ), - ], - }, - ); - } - _ => panic!("invalid event received"), - } - - // send empty response for the last three nodes - for _ in 0..3 { - match engine.next_action() { - Some(QueryAction::SendMessage { query, peer, .. }) => { - println!("next send message to {peer:?}"); - engine.register_response( - query, - peer, - KademliaMessage::FindNode { - target: Vec::new(), - peers: vec![], - }, - ); - } - _ => panic!("invalid event received"), - } - } - - let mut peers = match engine.next_action() { - Some(QueryAction::AddProviderToFoundNodes { - query, - provided_key, - provider, - peers, - quorum, - }) => { - assert_eq!(query, original_query_id); - assert_eq!(provided_key, original_provided_key); - assert_eq!(provider, local_content_provider); - assert_eq!(peers.len(), 4); - assert!(matches!(quorum, Quorum::All)); - - peers - } - _ => panic!("invalid event received"), - }; - - engine.start_add_provider_to_found_nodes_requests_tracking( - original_query_id, - original_provided_key.clone(), - peers.iter().map(|p| p.peer).collect(), - Quorum::All, - ); - - // sends to all but one peer succeed - let last_peer = peers.pop().unwrap(); - for peer in peers { - engine.register_send_success(original_query_id, peer.peer); - } - engine.register_send_failure(original_query_id, last_peer.peer); - - match engine.next_action() { - Some(QueryAction::QueryFailed { query }) => { - assert_eq!(query, original_query_id); - } - _ => panic!("invalid event received"), - } - - assert!(engine.next_action().is_none()); - } - - #[test] - fn add_provider_succeeds() { - let _ = tracing_subscriber::fmt() - .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) - .try_init(); - - let local_peer_id = PeerId::random(); - let mut engine = QueryEngine::new(local_peer_id, 20usize, 3usize); - let original_provided_key = RecordKey::new(&vec![1, 2, 3, 4]); - let local_content_provider = ContentProvider { - peer: local_peer_id, - addresses: vec![], - }; - - let target_key = Key::new(original_provided_key.clone()); - let distances = { - let mut distances = std::collections::BTreeMap::new(); - - for i in 1..64 { - let peer = make_peer_id(i, 0); - let key = Key::from(peer); - - distances.insert(target_key.distance(&key), peer); - } - - distances - }; - let mut iter = distances.iter(); - - // start add provider with one known peer - let add_query_id = QueryId(1340); - let _query = engine.start_add_provider( - add_query_id, - original_provided_key.clone(), - local_content_provider.clone(), - vec![KademliaPeer::new( - *iter.next().unwrap().1, - vec![], - ConnectionType::NotConnected, - )] - .into(), - Quorum::All, - ); - - let action = engine.next_action(); - assert!(engine.next_action().is_none()); - - // the one known peer responds with 3 other peers it knows - match action { - Some(QueryAction::SendMessage { query, peer, .. }) => { - engine.register_response( - query, - peer, - KademliaMessage::FindNode { - target: Vec::new(), - peers: vec![ - KademliaPeer::new( - *iter.next().unwrap().1, - vec![], - ConnectionType::NotConnected, - ), - KademliaPeer::new( - *iter.next().unwrap().1, - vec![], - ConnectionType::NotConnected, - ), - KademliaPeer::new( - *iter.next().unwrap().1, - vec![], - ConnectionType::NotConnected, - ), - ], - }, - ); - } - _ => panic!("invalid event received"), - } - - // send empty response for the last three nodes - for _ in 0..3 { - match engine.next_action() { - Some(QueryAction::SendMessage { query, peer, .. }) => { - println!("next send message to {peer:?}"); - engine.register_response( - query, - peer, - KademliaMessage::FindNode { - target: Vec::new(), - peers: vec![], - }, - ); - } - _ => panic!("invalid event received"), - } - } - - let peers = match engine.next_action() { - Some(QueryAction::AddProviderToFoundNodes { - query, - provided_key, - provider, - peers, - quorum, - }) => { - assert_eq!(query, add_query_id); - assert_eq!(provided_key, original_provided_key); - assert_eq!(provider, local_content_provider); - assert_eq!(peers.len(), 4); - assert!(matches!(quorum, Quorum::All)); - - peers - } - _ => panic!("invalid event received"), - }; - - engine.start_add_provider_to_found_nodes_requests_tracking( - add_query_id, - original_provided_key.clone(), - peers.iter().map(|p| p.peer).collect(), - Quorum::All, - ); - - // simulate successful sends to all peers - for peer in &peers { - engine.register_send_success(add_query_id, peer.peer); - } - - match engine.next_action() { - Some(QueryAction::AddProviderQuerySucceeded { - query, - provided_key, - }) => { - assert_eq!(query, add_query_id); - assert_eq!(provided_key, original_provided_key); - } - _ => panic!("invalid event received"), - } - - assert!(engine.next_action().is_none()); - - // get providers from those peers. - let get_query_id = QueryId(1341); - let _query = engine.start_get_providers( - get_query_id, - original_provided_key.clone(), - vec![ - KademliaPeer::new(peers[0].peer, vec![], ConnectionType::NotConnected), - KademliaPeer::new(peers[1].peer, vec![], ConnectionType::NotConnected), - KademliaPeer::new(peers[2].peer, vec![], ConnectionType::NotConnected), - KademliaPeer::new(peers[3].peer, vec![], ConnectionType::NotConnected), - ] - .into(), - vec![], - ); - - for _ in 0..4 { - match engine.next_action() { - Some(QueryAction::SendMessage { query, peer, .. }) => { - assert_eq!(query, get_query_id); - engine.register_response( - query, - peer, - KademliaMessage::GetProviders { - key: Some(original_provided_key.clone()), - peers: vec![], - providers: vec![local_content_provider.clone().into()], - }, - ); - } - event => panic!("invalid event received {:?}", event), - } - } - - match engine.next_action() { - Some(QueryAction::GetProvidersQueryDone { - query_id, - provided_key, - providers, - }) => { - assert_eq!(query_id, get_query_id); - assert_eq!(provided_key, original_provided_key); - assert_eq!(providers, vec![local_content_provider]); - } - event => panic!("invalid event received {:?}", event), - } - } - - #[test] - fn add_provider_succeeds_with_quorum_one() { - let _ = tracing_subscriber::fmt() - .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) - .try_init(); - - let local_peer_id = PeerId::random(); - let mut engine = QueryEngine::new(local_peer_id, 20usize, 3usize); - let original_provided_key = RecordKey::new(&vec![1, 2, 3, 4]); - let local_content_provider = ContentProvider { - peer: local_peer_id, - addresses: vec![], - }; - - let target_key = Key::new(original_provided_key.clone()); - let distances = { - let mut distances = std::collections::BTreeMap::new(); - - for i in 1..64 { - let peer = make_peer_id(i, 0); - let key = Key::from(peer); - - distances.insert(target_key.distance(&key), peer); - } - - distances - }; - let mut iter = distances.iter(); - - // start add provider with one known peer - let add_query_id = QueryId(1340); - let _query = engine.start_add_provider( - add_query_id, - original_provided_key.clone(), - local_content_provider.clone(), - vec![KademliaPeer::new( - *iter.next().unwrap().1, - vec![], - ConnectionType::NotConnected, - )] - .into(), - Quorum::One, - ); - - let action = engine.next_action(); - assert!(engine.next_action().is_none()); - - // the one known peer responds with 3 other peers it knows - match action { - Some(QueryAction::SendMessage { query, peer, .. }) => { - engine.register_response( - query, - peer, - KademliaMessage::FindNode { - target: Vec::new(), - peers: vec![ - KademliaPeer::new( - *iter.next().unwrap().1, - vec![], - ConnectionType::NotConnected, - ), - KademliaPeer::new( - *iter.next().unwrap().1, - vec![], - ConnectionType::NotConnected, - ), - KademliaPeer::new( - *iter.next().unwrap().1, - vec![], - ConnectionType::NotConnected, - ), - ], - }, - ); - } - _ => panic!("invalid event received"), - } - - // send empty response for the last three nodes - for _ in 0..3 { - match engine.next_action() { - Some(QueryAction::SendMessage { query, peer, .. }) => { - println!("next send message to {peer:?}"); - engine.register_response( - query, - peer, - KademliaMessage::FindNode { - target: Vec::new(), - peers: vec![], - }, - ); - } - _ => panic!("invalid event received"), - } - } - - let peers = match engine.next_action() { - Some(QueryAction::AddProviderToFoundNodes { - query, - provided_key, - provider, - peers, - quorum, - }) => { - assert_eq!(query, add_query_id); - assert_eq!(provided_key, original_provided_key); - assert_eq!(provider, local_content_provider); - assert_eq!(peers.len(), 4); - assert!(matches!(quorum, Quorum::One)); - - peers - } - _ => panic!("invalid event received"), - }; - - engine.start_add_provider_to_found_nodes_requests_tracking( - add_query_id, - original_provided_key.clone(), - peers.iter().map(|p| p.peer).collect(), - Quorum::One, - ); - - // all but one peer fail - assert!(peers.len() > 1); - engine.register_send_success(add_query_id, peers.first().unwrap().peer); - for peer in peers.iter().skip(1) { - engine.register_send_failure(add_query_id, peer.peer); - } - - match engine.next_action() { - Some(QueryAction::AddProviderQuerySucceeded { - query, - provided_key, - }) => { - assert_eq!(query, add_query_id); - assert_eq!(provided_key, original_provided_key); - } - _ => panic!("invalid event received"), - } - - assert!(engine.next_action().is_none()); - - // get providers from those peers. - let get_query_id = QueryId(1341); - let _query = engine.start_get_providers( - get_query_id, - original_provided_key.clone(), - vec![ - KademliaPeer::new(peers[0].peer, vec![], ConnectionType::NotConnected), - KademliaPeer::new(peers[1].peer, vec![], ConnectionType::NotConnected), - KademliaPeer::new(peers[2].peer, vec![], ConnectionType::NotConnected), - KademliaPeer::new(peers[3].peer, vec![], ConnectionType::NotConnected), - ] - .into(), - vec![], - ); - - // first peer responds with the provider - match engine.next_action() { - Some(QueryAction::SendMessage { query, peer, .. }) => { - assert_eq!(query, get_query_id); - engine.register_response( - query, - peer, - KademliaMessage::GetProviders { - key: Some(original_provided_key.clone()), - peers: vec![], - providers: vec![local_content_provider.clone().into()], - }, - ); - } - event => panic!("invalid event received {:?}", event), - } - - // other peers respond with no providers - for _ in 1..4 { - match engine.next_action() { - Some(QueryAction::SendMessage { query, peer, .. }) => { - assert_eq!(query, get_query_id); - engine.register_response( - query, - peer, - KademliaMessage::GetProviders { - key: Some(original_provided_key.clone()), - peers: vec![], - providers: vec![], - }, - ); - } - event => panic!("invalid event received {:?}", event), - } - } - - match engine.next_action() { - Some(QueryAction::GetProvidersQueryDone { - query_id, - provided_key, - providers, - }) => { - assert_eq!(query_id, get_query_id); - assert_eq!(provided_key, original_provided_key); - assert_eq!(providers, vec![local_content_provider]); - } - event => panic!("invalid event received {:?}", event), - } - } + use multihash::{Code, Multihash}; + + use super::*; + use crate::protocol::libp2p::kademlia::types::ConnectionType; + + // make fixed peer id + fn make_peer_id(first: u8, second: u8) -> PeerId { + let mut peer_id = vec![0u8; 32]; + peer_id[0] = first; + peer_id[1] = second; + + PeerId::from_bytes( + &Multihash::wrap(Code::Identity.into(), &peer_id) + .expect("The digest size is never too large") + .to_bytes(), + ) + .unwrap() + } + + #[test] + fn find_node_query_fails() { + let _ = tracing_subscriber::fmt() + .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) + .try_init(); + + let mut engine = QueryEngine::new(PeerId::random(), 20usize, 3usize); + let target_peer = PeerId::random(); + let _target_key = Key::from(target_peer); + + let query = engine.start_find_node( + QueryId(1337), + target_peer, + vec![ + KademliaPeer::new(PeerId::random(), vec![], ConnectionType::NotConnected), + KademliaPeer::new(PeerId::random(), vec![], ConnectionType::NotConnected), + KademliaPeer::new(PeerId::random(), vec![], ConnectionType::NotConnected), + KademliaPeer::new(PeerId::random(), vec![], ConnectionType::NotConnected), + ] + .into(), + ); + + for _ in 0..4 { + if let Some(QueryAction::SendMessage { query, peer, .. }) = engine.next_action() { + engine.register_response_failure(query, peer); + } + } + + if let Some(QueryAction::QueryFailed { query: failed }) = engine.next_action() { + assert_eq!(failed, query); + } + + assert!(engine.next_action().is_none()); + } + + #[test] + fn find_node_lookup_paused() { + let mut engine = QueryEngine::new(PeerId::random(), 20usize, 3usize); + let target_peer = PeerId::random(); + let _target_key = Key::from(target_peer); + + let _ = engine.start_find_node( + QueryId(1338), + target_peer, + vec![ + KademliaPeer::new(PeerId::random(), vec![], ConnectionType::NotConnected), + KademliaPeer::new(PeerId::random(), vec![], ConnectionType::NotConnected), + KademliaPeer::new(PeerId::random(), vec![], ConnectionType::NotConnected), + KademliaPeer::new(PeerId::random(), vec![], ConnectionType::NotConnected), + ] + .into(), + ); + + for _ in 0..3 { + let _ = engine.next_action(); + } + + assert!(engine.next_action().is_none()); + } + + #[test] + fn find_node_query_succeeds() { + let _ = tracing_subscriber::fmt() + .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) + .try_init(); + + let mut engine = QueryEngine::new(PeerId::random(), 20usize, 3usize); + let target_peer = make_peer_id(0, 0); + let target_key = Key::from(target_peer); + + let distances = { + let mut distances = std::collections::BTreeMap::new(); + + for i in 1..64 { + let peer = make_peer_id(i, 0); + let key = Key::from(peer); + + distances.insert(target_key.distance(&key), peer); + } + + distances + }; + let mut iter = distances.iter(); + + // start find node with one known peer + let _query = engine.start_find_node( + QueryId(1339), + target_peer, + vec![KademliaPeer::new(*iter.next().unwrap().1, vec![], ConnectionType::NotConnected)] + .into(), + ); + + let action = engine.next_action(); + assert!(engine.next_action().is_none()); + + // the one known peer responds with 3 other peers it knows + match action { + Some(QueryAction::SendMessage { query, peer, .. }) => { + engine.register_response( + query, + peer, + KademliaMessage::FindNode { + target: Vec::new(), + peers: vec![ + KademliaPeer::new( + *iter.next().unwrap().1, + vec![], + ConnectionType::NotConnected, + ), + KademliaPeer::new( + *iter.next().unwrap().1, + vec![], + ConnectionType::NotConnected, + ), + KademliaPeer::new( + *iter.next().unwrap().1, + vec![], + ConnectionType::NotConnected, + ), + ], + }, + ); + }, + _ => panic!("invalid event received"), + } + + // send empty response for the last three nodes + for _ in 0..3 { + match engine.next_action() { + Some(QueryAction::SendMessage { query, peer, .. }) => { + println!("next send message to {peer:?}"); + engine.register_response( + query, + peer, + KademliaMessage::FindNode { target: Vec::new(), peers: vec![] }, + ); + }, + _ => panic!("invalid event received"), + } + } + + match engine.next_action() { + Some(QueryAction::FindNodeQuerySucceeded { peers, .. }) => { + assert_eq!(peers.len(), 4); + }, + _ => panic!("invalid event received"), + } + + assert!(engine.next_action().is_none()); + } + + #[test] + fn put_record_fails() { + let _ = tracing_subscriber::fmt() + .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) + .try_init(); + + let mut engine = QueryEngine::new(PeerId::random(), 20usize, 3usize); + let record_key = RecordKey::new(&vec![1, 2, 3, 4]); + let target_key = Key::new(record_key.clone()); + let original_record = Record::new(record_key.clone(), vec![1, 3, 3, 7, 1, 3, 3, 8]); + + let distances = { + let mut distances = std::collections::BTreeMap::new(); + + for i in 1..64 { + let peer = make_peer_id(i, 0); + let key = Key::from(peer); + + distances.insert(target_key.distance(&key), peer); + } + + distances + }; + let mut iter = distances.iter(); + + // start find node with one known peer + let original_query_id = QueryId(1340); + let _query = engine.start_put_record( + original_query_id, + original_record.clone(), + vec![KademliaPeer::new(*iter.next().unwrap().1, vec![], ConnectionType::NotConnected)] + .into(), + Quorum::All, + ); + + let action = engine.next_action(); + assert!(engine.next_action().is_none()); + + // the one known peer responds with 3 other peers it knows + match action { + Some(QueryAction::SendMessage { query, peer, .. }) => { + engine.register_response( + query, + peer, + KademliaMessage::FindNode { + target: Vec::new(), + peers: vec![ + KademliaPeer::new( + *iter.next().unwrap().1, + vec![], + ConnectionType::NotConnected, + ), + KademliaPeer::new( + *iter.next().unwrap().1, + vec![], + ConnectionType::NotConnected, + ), + KademliaPeer::new( + *iter.next().unwrap().1, + vec![], + ConnectionType::NotConnected, + ), + ], + }, + ); + }, + _ => panic!("invalid event received"), + } + + // send empty response for the last three nodes + for _ in 0..3 { + match engine.next_action() { + Some(QueryAction::SendMessage { query, peer, .. }) => { + println!("next send message to {peer:?}"); + engine.register_response( + query, + peer, + KademliaMessage::FindNode { target: Vec::new(), peers: vec![] }, + ); + }, + _ => panic!("invalid event received"), + } + } + + let mut peers = match engine.next_action() { + Some(QueryAction::PutRecordToFoundNodes { query, peers, record, quorum }) => { + assert_eq!(query, original_query_id); + assert_eq!(peers.len(), 4); + assert_eq!(record.key, original_record.key); + assert_eq!(record.value, original_record.value); + assert!(matches!(quorum, Quorum::All)); + + peers + }, + _ => panic!("invalid event received"), + }; + + engine.start_put_record_to_found_nodes_requests_tracking( + original_query_id, + record_key.clone(), + peers.iter().map(|p| p.peer).collect(), + Quorum::All, + ); + + // sends to all but one peer succeed + let last_peer = peers.pop().unwrap(); + for peer in peers { + engine.register_send_success(original_query_id, peer.peer); + } + engine.register_send_failure(original_query_id, last_peer.peer); + + match engine.next_action() { + Some(QueryAction::QueryFailed { query }) => { + assert_eq!(query, original_query_id); + }, + _ => panic!("invalid event received"), + } + + assert!(engine.next_action().is_none()); + } + + #[test] + fn put_record_succeeds() { + let _ = tracing_subscriber::fmt() + .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) + .try_init(); + + let mut engine = QueryEngine::new(PeerId::random(), 20usize, 3usize); + let record_key = RecordKey::new(&vec![1, 2, 3, 4]); + let target_key = Key::new(record_key.clone()); + let original_record = Record::new(record_key.clone(), vec![1, 3, 3, 7, 1, 3, 3, 8]); + + let distances = { + let mut distances = std::collections::BTreeMap::new(); + + for i in 1..64 { + let peer = make_peer_id(i, 0); + let key = Key::from(peer); + + distances.insert(target_key.distance(&key), peer); + } + + distances + }; + let mut iter = distances.iter(); + + // start find node with one known peer + let original_query_id = QueryId(1340); + let _query = engine.start_put_record( + original_query_id, + original_record.clone(), + vec![KademliaPeer::new(*iter.next().unwrap().1, vec![], ConnectionType::NotConnected)] + .into(), + Quorum::All, + ); + + let action = engine.next_action(); + assert!(engine.next_action().is_none()); + + // the one known peer responds with 3 other peers it knows + match action { + Some(QueryAction::SendMessage { query, peer, .. }) => { + engine.register_response( + query, + peer, + KademliaMessage::FindNode { + target: Vec::new(), + peers: vec![ + KademliaPeer::new( + *iter.next().unwrap().1, + vec![], + ConnectionType::NotConnected, + ), + KademliaPeer::new( + *iter.next().unwrap().1, + vec![], + ConnectionType::NotConnected, + ), + KademliaPeer::new( + *iter.next().unwrap().1, + vec![], + ConnectionType::NotConnected, + ), + ], + }, + ); + }, + _ => panic!("invalid event received"), + } + + // send empty response for the last three nodes + for _ in 0..3 { + match engine.next_action() { + Some(QueryAction::SendMessage { query, peer, .. }) => { + println!("next send message to {peer:?}"); + engine.register_response( + query, + peer, + KademliaMessage::FindNode { target: Vec::new(), peers: vec![] }, + ); + }, + _ => panic!("invalid event received"), + } + } + + let peers = match engine.next_action() { + Some(QueryAction::PutRecordToFoundNodes { query, peers, record, quorum }) => { + assert_eq!(query, original_query_id); + assert_eq!(peers.len(), 4); + assert_eq!(record.key, original_record.key); + assert_eq!(record.value, original_record.value); + assert!(matches!(quorum, Quorum::All)); + + peers + }, + _ => panic!("invalid event received"), + }; + + engine.start_put_record_to_found_nodes_requests_tracking( + original_query_id, + record_key.clone(), + peers.iter().map(|p| p.peer).collect(), + Quorum::All, + ); + + // simulate successful sends to all peers + for peer in &peers { + engine.register_send_success(original_query_id, peer.peer); + } + + match engine.next_action() { + Some(QueryAction::PutRecordQuerySucceeded { query, key }) => { + assert_eq!(query, original_query_id); + assert_eq!(key, record_key); + }, + _ => panic!("invalid event received"), + } + + assert!(engine.next_action().is_none()); + + // get records from those peers. + let _query = engine.start_get_record( + QueryId(1341), + record_key.clone(), + vec![ + KademliaPeer::new(peers[0].peer, vec![], ConnectionType::NotConnected), + KademliaPeer::new(peers[1].peer, vec![], ConnectionType::NotConnected), + KademliaPeer::new(peers[2].peer, vec![], ConnectionType::NotConnected), + KademliaPeer::new(peers[3].peer, vec![], ConnectionType::NotConnected), + ] + .into(), + Quorum::All, + false, + ); + + let mut records = Vec::new(); + for _ in 0..4 { + match engine.next_action() { + Some(QueryAction::SendMessage { query, peer, .. }) => { + assert_eq!(query, QueryId(1341)); + engine.register_response( + query, + peer, + KademliaMessage::GetRecord { + record: Some(original_record.clone()), + peers: vec![], + key: Some(record_key.clone()), + }, + ); + }, + event => panic!("invalid event received {:?}", event), + } + + // GetRecordPartialResult is emitted after the `register_response` if the record is + // valid. + match engine.next_action() { + Some(QueryAction::GetRecordPartialResult { query_id, record }) => { + println!("Partial result {:?}", record); + assert_eq!(query_id, QueryId(1341)); + records.push(record); + }, + event => panic!("invalid event received {:?}", event), + } + } + + let peers: std::collections::HashSet<_> = peers.into_iter().map(|p| p.peer).collect(); + match engine.next_action() { + Some(QueryAction::GetRecordQueryDone { .. }) => { + println!("Records {:?}", records); + let query_peers = records + .iter() + .map(|peer_record| peer_record.peer) + .collect::>(); + assert_eq!(peers, query_peers); + + let records: std::collections::HashSet<_> = + records.into_iter().map(|peer_record| peer_record.record).collect(); + // One single record found across peers. + assert_eq!(records.len(), 1); + let record = records.into_iter().next().unwrap(); + + assert_eq!(record.key, original_record.key); + assert_eq!(record.value, original_record.value); + }, + event => panic!("invalid event received {:?}", event), + } + } + + #[test] + fn put_record_succeeds_with_quorum_one() { + let _ = tracing_subscriber::fmt() + .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) + .try_init(); + + let mut engine = QueryEngine::new(PeerId::random(), 20usize, 3usize); + let record_key = RecordKey::new(&vec![1, 2, 3, 4]); + let target_key = Key::new(record_key.clone()); + let original_record = Record::new(record_key.clone(), vec![1, 3, 3, 7, 1, 3, 3, 8]); + + let distances = { + let mut distances = std::collections::BTreeMap::new(); + + for i in 1..64 { + let peer = make_peer_id(i, 0); + let key = Key::from(peer); + + distances.insert(target_key.distance(&key), peer); + } + + distances + }; + let mut iter = distances.iter(); + + // start find node with one known peer + let original_query_id = QueryId(1340); + let _query = engine.start_put_record( + original_query_id, + original_record.clone(), + vec![KademliaPeer::new(*iter.next().unwrap().1, vec![], ConnectionType::NotConnected)] + .into(), + Quorum::One, + ); + + let action = engine.next_action(); + assert!(engine.next_action().is_none()); + + // the one known peer responds with 3 other peers it knows + match action { + Some(QueryAction::SendMessage { query, peer, .. }) => { + engine.register_response( + query, + peer, + KademliaMessage::FindNode { + target: Vec::new(), + peers: vec![ + KademliaPeer::new( + *iter.next().unwrap().1, + vec![], + ConnectionType::NotConnected, + ), + KademliaPeer::new( + *iter.next().unwrap().1, + vec![], + ConnectionType::NotConnected, + ), + KademliaPeer::new( + *iter.next().unwrap().1, + vec![], + ConnectionType::NotConnected, + ), + ], + }, + ); + }, + _ => panic!("invalid event received"), + } + + // send empty response for the last three nodes + for _ in 0..3 { + match engine.next_action() { + Some(QueryAction::SendMessage { query, peer, .. }) => { + println!("next send message to {peer:?}"); + engine.register_response( + query, + peer, + KademliaMessage::FindNode { target: Vec::new(), peers: vec![] }, + ); + }, + _ => panic!("invalid event received"), + } + } + + let peers = match engine.next_action() { + Some(QueryAction::PutRecordToFoundNodes { query, peers, record, quorum }) => { + assert_eq!(query, original_query_id); + assert_eq!(peers.len(), 4); + assert_eq!(record.key, original_record.key); + assert_eq!(record.value, original_record.value); + assert!(matches!(quorum, Quorum::One)); + + peers + }, + _ => panic!("invalid event received"), + }; + + engine.start_put_record_to_found_nodes_requests_tracking( + original_query_id, + record_key.clone(), + peers.iter().map(|p| p.peer).collect(), + Quorum::One, + ); + + // all but one peer fail + assert!(peers.len() > 1); + for peer in peers.iter().take(peers.len() - 1) { + engine.register_send_failure(original_query_id, peer.peer); + } + engine.register_send_success(original_query_id, peers.last().unwrap().peer); + + match engine.next_action() { + Some(QueryAction::PutRecordQuerySucceeded { query, key }) => { + assert_eq!(query, original_query_id); + assert_eq!(key, record_key); + }, + _ => panic!("invalid event received"), + } + + assert!(engine.next_action().is_none()); + + // get records from those peers. + let _query = engine.start_get_record( + QueryId(1341), + record_key.clone(), + vec![ + KademliaPeer::new(peers[0].peer, vec![], ConnectionType::NotConnected), + KademliaPeer::new(peers[1].peer, vec![], ConnectionType::NotConnected), + KademliaPeer::new(peers[2].peer, vec![], ConnectionType::NotConnected), + KademliaPeer::new(peers[3].peer, vec![], ConnectionType::NotConnected), + ] + .into(), + Quorum::All, + false, + ); + + let mut records = Vec::new(); + for _ in 0..4 { + match engine.next_action() { + Some(QueryAction::SendMessage { query, peer, .. }) => { + assert_eq!(query, QueryId(1341)); + engine.register_response( + query, + peer, + KademliaMessage::GetRecord { + record: Some(original_record.clone()), + peers: vec![], + key: Some(record_key.clone()), + }, + ); + }, + event => panic!("invalid event received {:?}", event), + } + + // GetRecordPartialResult is emitted after the `register_response` if the record is + // valid. + match engine.next_action() { + Some(QueryAction::GetRecordPartialResult { query_id, record }) => { + println!("Partial result {:?}", record); + assert_eq!(query_id, QueryId(1341)); + records.push(record); + }, + event => panic!("invalid event received {:?}", event), + } + } + + let peers: std::collections::HashSet<_> = peers.into_iter().map(|p| p.peer).collect(); + match engine.next_action() { + Some(QueryAction::GetRecordQueryDone { .. }) => { + println!("Records {:?}", records); + let query_peers = records + .iter() + .map(|peer_record| peer_record.peer) + .collect::>(); + assert_eq!(peers, query_peers); + + let records: std::collections::HashSet<_> = + records.into_iter().map(|peer_record| peer_record.record).collect(); + // One single record found across peers. + assert_eq!(records.len(), 1); + let record = records.into_iter().next().unwrap(); + + assert_eq!(record.key, original_record.key); + assert_eq!(record.value, original_record.value); + }, + event => panic!("invalid event received {:?}", event), + } + } + + #[test] + fn add_provider_fails() { + let _ = tracing_subscriber::fmt() + .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) + .try_init(); + + let local_peer_id = PeerId::random(); + let mut engine = QueryEngine::new(local_peer_id, 20usize, 3usize); + let original_provided_key = RecordKey::new(&vec![1, 2, 3, 4]); + let local_content_provider = ContentProvider { peer: local_peer_id, addresses: vec![] }; + let target_key = Key::new(original_provided_key.clone()); + + let distances = { + let mut distances = std::collections::BTreeMap::new(); + + for i in 1..64 { + let peer = make_peer_id(i, 0); + let key = Key::from(peer); + + distances.insert(target_key.distance(&key), peer); + } + + distances + }; + let mut iter = distances.iter(); + + // start add provider with one known peer + let original_query_id = QueryId(1340); + let _query = engine.start_add_provider( + original_query_id, + original_provided_key.clone(), + local_content_provider.clone(), + vec![KademliaPeer::new(*iter.next().unwrap().1, vec![], ConnectionType::NotConnected)] + .into(), + Quorum::All, + ); + + let action = engine.next_action(); + assert!(engine.next_action().is_none()); + + // the one known peer responds with 3 other peers it knows + match action { + Some(QueryAction::SendMessage { query, peer, .. }) => { + engine.register_response( + query, + peer, + KademliaMessage::FindNode { + target: Vec::new(), + peers: vec![ + KademliaPeer::new( + *iter.next().unwrap().1, + vec![], + ConnectionType::NotConnected, + ), + KademliaPeer::new( + *iter.next().unwrap().1, + vec![], + ConnectionType::NotConnected, + ), + KademliaPeer::new( + *iter.next().unwrap().1, + vec![], + ConnectionType::NotConnected, + ), + ], + }, + ); + }, + _ => panic!("invalid event received"), + } + + // send empty response for the last three nodes + for _ in 0..3 { + match engine.next_action() { + Some(QueryAction::SendMessage { query, peer, .. }) => { + println!("next send message to {peer:?}"); + engine.register_response( + query, + peer, + KademliaMessage::FindNode { target: Vec::new(), peers: vec![] }, + ); + }, + _ => panic!("invalid event received"), + } + } + + let mut peers = match engine.next_action() { + Some(QueryAction::AddProviderToFoundNodes { + query, + provided_key, + provider, + peers, + quorum, + }) => { + assert_eq!(query, original_query_id); + assert_eq!(provided_key, original_provided_key); + assert_eq!(provider, local_content_provider); + assert_eq!(peers.len(), 4); + assert!(matches!(quorum, Quorum::All)); + + peers + }, + _ => panic!("invalid event received"), + }; + + engine.start_add_provider_to_found_nodes_requests_tracking( + original_query_id, + original_provided_key.clone(), + peers.iter().map(|p| p.peer).collect(), + Quorum::All, + ); + + // sends to all but one peer succeed + let last_peer = peers.pop().unwrap(); + for peer in peers { + engine.register_send_success(original_query_id, peer.peer); + } + engine.register_send_failure(original_query_id, last_peer.peer); + + match engine.next_action() { + Some(QueryAction::QueryFailed { query }) => { + assert_eq!(query, original_query_id); + }, + _ => panic!("invalid event received"), + } + + assert!(engine.next_action().is_none()); + } + + #[test] + fn add_provider_succeeds() { + let _ = tracing_subscriber::fmt() + .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) + .try_init(); + + let local_peer_id = PeerId::random(); + let mut engine = QueryEngine::new(local_peer_id, 20usize, 3usize); + let original_provided_key = RecordKey::new(&vec![1, 2, 3, 4]); + let local_content_provider = ContentProvider { peer: local_peer_id, addresses: vec![] }; + + let target_key = Key::new(original_provided_key.clone()); + let distances = { + let mut distances = std::collections::BTreeMap::new(); + + for i in 1..64 { + let peer = make_peer_id(i, 0); + let key = Key::from(peer); + + distances.insert(target_key.distance(&key), peer); + } + + distances + }; + let mut iter = distances.iter(); + + // start add provider with one known peer + let add_query_id = QueryId(1340); + let _query = engine.start_add_provider( + add_query_id, + original_provided_key.clone(), + local_content_provider.clone(), + vec![KademliaPeer::new(*iter.next().unwrap().1, vec![], ConnectionType::NotConnected)] + .into(), + Quorum::All, + ); + + let action = engine.next_action(); + assert!(engine.next_action().is_none()); + + // the one known peer responds with 3 other peers it knows + match action { + Some(QueryAction::SendMessage { query, peer, .. }) => { + engine.register_response( + query, + peer, + KademliaMessage::FindNode { + target: Vec::new(), + peers: vec![ + KademliaPeer::new( + *iter.next().unwrap().1, + vec![], + ConnectionType::NotConnected, + ), + KademliaPeer::new( + *iter.next().unwrap().1, + vec![], + ConnectionType::NotConnected, + ), + KademliaPeer::new( + *iter.next().unwrap().1, + vec![], + ConnectionType::NotConnected, + ), + ], + }, + ); + }, + _ => panic!("invalid event received"), + } + + // send empty response for the last three nodes + for _ in 0..3 { + match engine.next_action() { + Some(QueryAction::SendMessage { query, peer, .. }) => { + println!("next send message to {peer:?}"); + engine.register_response( + query, + peer, + KademliaMessage::FindNode { target: Vec::new(), peers: vec![] }, + ); + }, + _ => panic!("invalid event received"), + } + } + + let peers = match engine.next_action() { + Some(QueryAction::AddProviderToFoundNodes { + query, + provided_key, + provider, + peers, + quorum, + }) => { + assert_eq!(query, add_query_id); + assert_eq!(provided_key, original_provided_key); + assert_eq!(provider, local_content_provider); + assert_eq!(peers.len(), 4); + assert!(matches!(quorum, Quorum::All)); + + peers + }, + _ => panic!("invalid event received"), + }; + + engine.start_add_provider_to_found_nodes_requests_tracking( + add_query_id, + original_provided_key.clone(), + peers.iter().map(|p| p.peer).collect(), + Quorum::All, + ); + + // simulate successful sends to all peers + for peer in &peers { + engine.register_send_success(add_query_id, peer.peer); + } + + match engine.next_action() { + Some(QueryAction::AddProviderQuerySucceeded { query, provided_key }) => { + assert_eq!(query, add_query_id); + assert_eq!(provided_key, original_provided_key); + }, + _ => panic!("invalid event received"), + } + + assert!(engine.next_action().is_none()); + + // get providers from those peers. + let get_query_id = QueryId(1341); + let _query = engine.start_get_providers( + get_query_id, + original_provided_key.clone(), + vec![ + KademliaPeer::new(peers[0].peer, vec![], ConnectionType::NotConnected), + KademliaPeer::new(peers[1].peer, vec![], ConnectionType::NotConnected), + KademliaPeer::new(peers[2].peer, vec![], ConnectionType::NotConnected), + KademliaPeer::new(peers[3].peer, vec![], ConnectionType::NotConnected), + ] + .into(), + vec![], + ); + + for _ in 0..4 { + match engine.next_action() { + Some(QueryAction::SendMessage { query, peer, .. }) => { + assert_eq!(query, get_query_id); + engine.register_response( + query, + peer, + KademliaMessage::GetProviders { + key: Some(original_provided_key.clone()), + peers: vec![], + providers: vec![local_content_provider.clone().into()], + }, + ); + }, + event => panic!("invalid event received {:?}", event), + } + } + + match engine.next_action() { + Some(QueryAction::GetProvidersQueryDone { query_id, provided_key, providers }) => { + assert_eq!(query_id, get_query_id); + assert_eq!(provided_key, original_provided_key); + assert_eq!(providers, vec![local_content_provider]); + }, + event => panic!("invalid event received {:?}", event), + } + } + + #[test] + fn add_provider_succeeds_with_quorum_one() { + let _ = tracing_subscriber::fmt() + .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) + .try_init(); + + let local_peer_id = PeerId::random(); + let mut engine = QueryEngine::new(local_peer_id, 20usize, 3usize); + let original_provided_key = RecordKey::new(&vec![1, 2, 3, 4]); + let local_content_provider = ContentProvider { peer: local_peer_id, addresses: vec![] }; + + let target_key = Key::new(original_provided_key.clone()); + let distances = { + let mut distances = std::collections::BTreeMap::new(); + + for i in 1..64 { + let peer = make_peer_id(i, 0); + let key = Key::from(peer); + + distances.insert(target_key.distance(&key), peer); + } + + distances + }; + let mut iter = distances.iter(); + + // start add provider with one known peer + let add_query_id = QueryId(1340); + let _query = engine.start_add_provider( + add_query_id, + original_provided_key.clone(), + local_content_provider.clone(), + vec![KademliaPeer::new(*iter.next().unwrap().1, vec![], ConnectionType::NotConnected)] + .into(), + Quorum::One, + ); + + let action = engine.next_action(); + assert!(engine.next_action().is_none()); + + // the one known peer responds with 3 other peers it knows + match action { + Some(QueryAction::SendMessage { query, peer, .. }) => { + engine.register_response( + query, + peer, + KademliaMessage::FindNode { + target: Vec::new(), + peers: vec![ + KademliaPeer::new( + *iter.next().unwrap().1, + vec![], + ConnectionType::NotConnected, + ), + KademliaPeer::new( + *iter.next().unwrap().1, + vec![], + ConnectionType::NotConnected, + ), + KademliaPeer::new( + *iter.next().unwrap().1, + vec![], + ConnectionType::NotConnected, + ), + ], + }, + ); + }, + _ => panic!("invalid event received"), + } + + // send empty response for the last three nodes + for _ in 0..3 { + match engine.next_action() { + Some(QueryAction::SendMessage { query, peer, .. }) => { + println!("next send message to {peer:?}"); + engine.register_response( + query, + peer, + KademliaMessage::FindNode { target: Vec::new(), peers: vec![] }, + ); + }, + _ => panic!("invalid event received"), + } + } + + let peers = match engine.next_action() { + Some(QueryAction::AddProviderToFoundNodes { + query, + provided_key, + provider, + peers, + quorum, + }) => { + assert_eq!(query, add_query_id); + assert_eq!(provided_key, original_provided_key); + assert_eq!(provider, local_content_provider); + assert_eq!(peers.len(), 4); + assert!(matches!(quorum, Quorum::One)); + + peers + }, + _ => panic!("invalid event received"), + }; + + engine.start_add_provider_to_found_nodes_requests_tracking( + add_query_id, + original_provided_key.clone(), + peers.iter().map(|p| p.peer).collect(), + Quorum::One, + ); + + // all but one peer fail + assert!(peers.len() > 1); + engine.register_send_success(add_query_id, peers.first().unwrap().peer); + for peer in peers.iter().skip(1) { + engine.register_send_failure(add_query_id, peer.peer); + } + + match engine.next_action() { + Some(QueryAction::AddProviderQuerySucceeded { query, provided_key }) => { + assert_eq!(query, add_query_id); + assert_eq!(provided_key, original_provided_key); + }, + _ => panic!("invalid event received"), + } + + assert!(engine.next_action().is_none()); + + // get providers from those peers. + let get_query_id = QueryId(1341); + let _query = engine.start_get_providers( + get_query_id, + original_provided_key.clone(), + vec![ + KademliaPeer::new(peers[0].peer, vec![], ConnectionType::NotConnected), + KademliaPeer::new(peers[1].peer, vec![], ConnectionType::NotConnected), + KademliaPeer::new(peers[2].peer, vec![], ConnectionType::NotConnected), + KademliaPeer::new(peers[3].peer, vec![], ConnectionType::NotConnected), + ] + .into(), + vec![], + ); + + // first peer responds with the provider + match engine.next_action() { + Some(QueryAction::SendMessage { query, peer, .. }) => { + assert_eq!(query, get_query_id); + engine.register_response( + query, + peer, + KademliaMessage::GetProviders { + key: Some(original_provided_key.clone()), + peers: vec![], + providers: vec![local_content_provider.clone().into()], + }, + ); + }, + event => panic!("invalid event received {:?}", event), + } + + // other peers respond with no providers + for _ in 1..4 { + match engine.next_action() { + Some(QueryAction::SendMessage { query, peer, .. }) => { + assert_eq!(query, get_query_id); + engine.register_response( + query, + peer, + KademliaMessage::GetProviders { + key: Some(original_provided_key.clone()), + peers: vec![], + providers: vec![], + }, + ); + }, + event => panic!("invalid event received {:?}", event), + } + } + + match engine.next_action() { + Some(QueryAction::GetProvidersQueryDone { query_id, provided_key, providers }) => { + assert_eq!(query_id, get_query_id); + assert_eq!(provided_key, original_provided_key); + assert_eq!(providers, vec![local_content_provider]); + }, + event => panic!("invalid event received {:?}", event), + } + } } diff --git a/client/litep2p/src/protocol/libp2p/kademlia/query/target_peers.rs b/client/litep2p/src/protocol/libp2p/kademlia/query/target_peers.rs index 964aca4a..bb1cdcf6 100644 --- a/client/litep2p/src/protocol/libp2p/kademlia/query/target_peers.rs +++ b/client/litep2p/src/protocol/libp2p/kademlia/query/target_peers.rs @@ -18,8 +18,8 @@ // FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER // DEALINGS IN THE SOFTWARE. use crate::{ - protocol::libp2p::kademlia::{handle::Quorum, query::QueryAction, QueryId, RecordKey}, - PeerId, + protocol::libp2p::kademlia::{handle::Quorum, query::QueryAction, QueryId, RecordKey}, + PeerId, }; use std::{cmp, collections::HashSet}; @@ -30,120 +30,120 @@ const LOG_TARGET: &str = "litep2p::ipfs::kademlia::query::target_peers"; /// Context for tracking `PUT_VALUE`/`ADD_PROVIDER` requests to peers. #[derive(Debug)] pub struct PutToTargetPeersContext { - /// Query ID. - pub query: QueryId, + /// Query ID. + pub query: QueryId, - /// Record/provider key. - pub key: RecordKey, + /// Record/provider key. + pub key: RecordKey, - /// Quorum that needs to be reached for the query to succeed. - peers_to_succeed: usize, + /// Quorum that needs to be reached for the query to succeed. + peers_to_succeed: usize, - /// Peers we're waiting for responses from. - pending_peers: HashSet, + /// Peers we're waiting for responses from. + pending_peers: HashSet, - /// Number of successfully responded peers. - n_succeeded: usize, + /// Number of successfully responded peers. + n_succeeded: usize, } impl PutToTargetPeersContext { - /// Create new [`PutToTargetPeersContext`]. - pub fn new(query: QueryId, key: RecordKey, peers: Vec, quorum: Quorum) -> Self { - Self { - query, - key, - peers_to_succeed: match quorum { - Quorum::One => 1, - // Clamp by the number of discovered peers. This should ever be relevant on - // small networks with fewer peers than the replication factor. Without such - // clamping the query would always fail in small testnets. - Quorum::N(n) => cmp::min(n.get(), cmp::max(peers.len(), 1)), - Quorum::All => cmp::max(peers.len(), 1), - }, - pending_peers: peers.into_iter().collect(), - n_succeeded: 0, - } - } - - /// Register a success of sending a message to `peer`. - pub fn register_send_success(&mut self, peer: PeerId) { - if self.pending_peers.remove(&peer) { - self.n_succeeded += 1; - - tracing::trace!( - target: LOG_TARGET, - query = ?self.query, - ?peer, - "successful `PUT_VALUE`/`ADD_PROVIDER` to peer", - ); - } else { - tracing::debug!( - target: LOG_TARGET, - query = ?self.query, - ?peer, - "`PutToTargetPeersContext::register_response`: pending peer does not exist", - ); - } - } - - /// Register a failure of sending a message to `peer`. - pub fn register_send_failure(&mut self, peer: PeerId) { - if self.pending_peers.remove(&peer) { - tracing::trace!( - target: LOG_TARGET, - query = ?self.query, - ?peer, - "failed `PUT_VALUE`/`ADD_PROVIDER` to peer", - ); - } else { - tracing::debug!( - target: LOG_TARGET, - query = ?self.query, - ?peer, - "`PutToTargetPeersContext::register_response_failure`: pending peer does not exist", - ); - } - } - - /// Register successful response from peer. - pub fn register_response(&mut self, _peer: PeerId) { - // Currently we only track if we successfully sent the message to the peer both for - // `PUT_VALUE` and `ADD_PROVIDER`. While `PUT_VALUE` has a response message, due to litep2p - // not sending it in the past, tracking it would frequently result in reporting query - // failures. `ADD_PROVIDER` does not have a response message at all. - - // TODO: once most of the network is on a litep2p version that sends `PUT_VALUE` responses, - // we should track them. - } - - /// Register failed response from peer. - pub fn register_response_failure(&mut self, _peer: PeerId) { - // See a comment in `register_response`. - - // Also note that due to the implementation of [`QueryEngine::register_peer_failure`], only - // one of `register_response_failure` or `register_send_failure` must be implemented. - } - - /// Check if all responses have been received. - pub fn is_finished(&self) -> bool { - self.pending_peers.is_empty() - } - - /// Check if all requests were successful. - pub fn is_succeded(&self) -> bool { - self.n_succeeded >= self.peers_to_succeed - } - - /// Get next action if the context is finished. - pub fn next_action(&self) -> Option { - if self.is_finished() { - if self.is_succeded() { - Some(QueryAction::QuerySucceeded { query: self.query }) - } else { - Some(QueryAction::QueryFailed { query: self.query }) - } - } else { - None - } - } + /// Create new [`PutToTargetPeersContext`]. + pub fn new(query: QueryId, key: RecordKey, peers: Vec, quorum: Quorum) -> Self { + Self { + query, + key, + peers_to_succeed: match quorum { + Quorum::One => 1, + // Clamp by the number of discovered peers. This should ever be relevant on + // small networks with fewer peers than the replication factor. Without such + // clamping the query would always fail in small testnets. + Quorum::N(n) => cmp::min(n.get(), cmp::max(peers.len(), 1)), + Quorum::All => cmp::max(peers.len(), 1), + }, + pending_peers: peers.into_iter().collect(), + n_succeeded: 0, + } + } + + /// Register a success of sending a message to `peer`. + pub fn register_send_success(&mut self, peer: PeerId) { + if self.pending_peers.remove(&peer) { + self.n_succeeded += 1; + + tracing::trace!( + target: LOG_TARGET, + query = ?self.query, + ?peer, + "successful `PUT_VALUE`/`ADD_PROVIDER` to peer", + ); + } else { + tracing::debug!( + target: LOG_TARGET, + query = ?self.query, + ?peer, + "`PutToTargetPeersContext::register_response`: pending peer does not exist", + ); + } + } + + /// Register a failure of sending a message to `peer`. + pub fn register_send_failure(&mut self, peer: PeerId) { + if self.pending_peers.remove(&peer) { + tracing::trace!( + target: LOG_TARGET, + query = ?self.query, + ?peer, + "failed `PUT_VALUE`/`ADD_PROVIDER` to peer", + ); + } else { + tracing::debug!( + target: LOG_TARGET, + query = ?self.query, + ?peer, + "`PutToTargetPeersContext::register_response_failure`: pending peer does not exist", + ); + } + } + + /// Register successful response from peer. + pub fn register_response(&mut self, _peer: PeerId) { + // Currently we only track if we successfully sent the message to the peer both for + // `PUT_VALUE` and `ADD_PROVIDER`. While `PUT_VALUE` has a response message, due to litep2p + // not sending it in the past, tracking it would frequently result in reporting query + // failures. `ADD_PROVIDER` does not have a response message at all. + + // TODO: once most of the network is on a litep2p version that sends `PUT_VALUE` responses, + // we should track them. + } + + /// Register failed response from peer. + pub fn register_response_failure(&mut self, _peer: PeerId) { + // See a comment in `register_response`. + + // Also note that due to the implementation of [`QueryEngine::register_peer_failure`], only + // one of `register_response_failure` or `register_send_failure` must be implemented. + } + + /// Check if all responses have been received. + pub fn is_finished(&self) -> bool { + self.pending_peers.is_empty() + } + + /// Check if all requests were successful. + pub fn is_succeded(&self) -> bool { + self.n_succeeded >= self.peers_to_succeed + } + + /// Get next action if the context is finished. + pub fn next_action(&self) -> Option { + if self.is_finished() { + if self.is_succeded() { + Some(QueryAction::QuerySucceeded { query: self.query }) + } else { + Some(QueryAction::QueryFailed { query: self.query }) + } + } else { + None + } + } } diff --git a/client/litep2p/src/protocol/libp2p/kademlia/record.rs b/client/litep2p/src/protocol/libp2p/kademlia/record.rs index 322553d4..bb1d8175 100644 --- a/client/litep2p/src/protocol/libp2p/kademlia/record.rs +++ b/client/litep2p/src/protocol/libp2p/kademlia/record.rs @@ -20,11 +20,11 @@ // DEALINGS IN THE SOFTWARE. use crate::{ - protocol::libp2p::kademlia::types::{ - ConnectionType, Distance, KademliaPeer, Key as KademliaKey, - }, - transport::manager::address::{AddressRecord, AddressStore}, - Multiaddr, PeerId, + protocol::libp2p::kademlia::types::{ + ConnectionType, Distance, KademliaPeer, Key as KademliaKey, + }, + transport::manager::address::{AddressRecord, AddressStore}, + Multiaddr, PeerId, }; use bytes::Bytes; @@ -38,148 +38,143 @@ use std::{borrow::Borrow, time::Instant}; pub struct Key(Bytes); impl Key { - /// Creates a new key from the bytes of the input. - pub fn new>(key: &K) -> Self { - Key(Bytes::copy_from_slice(key.as_ref())) - } - - /// Copies the bytes of the key into a new vector. - pub fn to_vec(&self) -> Vec { - Vec::from(&self.0[..]) - } + /// Creates a new key from the bytes of the input. + pub fn new>(key: &K) -> Self { + Key(Bytes::copy_from_slice(key.as_ref())) + } + + /// Copies the bytes of the key into a new vector. + pub fn to_vec(&self) -> Vec { + Vec::from(&self.0[..]) + } } impl From for Vec { - fn from(k: Key) -> Vec { - Vec::from(&k.0[..]) - } + fn from(k: Key) -> Vec { + Vec::from(&k.0[..]) + } } impl Borrow<[u8]> for Key { - fn borrow(&self) -> &[u8] { - &self.0[..] - } + fn borrow(&self) -> &[u8] { + &self.0[..] + } } impl AsRef<[u8]> for Key { - fn as_ref(&self) -> &[u8] { - &self.0[..] - } + fn as_ref(&self) -> &[u8] { + &self.0[..] + } } impl From> for Key { - fn from(v: Vec) -> Key { - Key(Bytes::from(v)) - } + fn from(v: Vec) -> Key { + Key(Bytes::from(v)) + } } impl From for Key { - fn from(m: Multihash) -> Key { - Key::from(m.to_bytes()) - } + fn from(m: Multihash) -> Key { + Key::from(m.to_bytes()) + } } /// A record stored in the DHT. #[derive(Clone, Debug, Eq, PartialEq, Hash)] #[cfg_attr(feature = "fuzz", derive(serde::Serialize, serde::Deserialize))] pub struct Record { - /// Key of the record. - pub key: Key, + /// Key of the record. + pub key: Key, - /// Value of the record. - pub value: Vec, + /// Value of the record. + pub value: Vec, - /// The (original) publisher of the record. - pub publisher: Option, + /// The (original) publisher of the record. + pub publisher: Option, - /// The expiration time as measured by a local, monotonic clock. - #[cfg_attr(feature = "fuzz", serde(with = "serde_millis"))] - pub expires: Option, + /// The expiration time as measured by a local, monotonic clock. + #[cfg_attr(feature = "fuzz", serde(with = "serde_millis"))] + pub expires: Option, } impl Record { - /// Creates a new record for insertion into the DHT. - pub fn new(key: K, value: Vec) -> Self - where - K: Into, - { - Record { - key: key.into(), - value, - publisher: None, - expires: None, - } - } - - /// Checks whether the record is expired w.r.t. the given `Instant`. - pub fn is_expired(&self, now: Instant) -> bool { - self.expires.is_some_and(|t| now >= t) - } + /// Creates a new record for insertion into the DHT. + pub fn new(key: K, value: Vec) -> Self + where + K: Into, + { + Record { key: key.into(), value, publisher: None, expires: None } + } + + /// Checks whether the record is expired w.r.t. the given `Instant`. + pub fn is_expired(&self, now: Instant) -> bool { + self.expires.is_some_and(|t| now >= t) + } } /// A record received by the given peer. #[derive(Debug, Clone, PartialEq, Eq)] pub struct PeerRecord { - /// The peer from whom the record was received - pub peer: PeerId, + /// The peer from whom the record was received + pub peer: PeerId, - /// The provided record. - pub record: Record, + /// The provided record. + pub record: Record, } /// A record keeping information about a content provider. #[derive(Clone, Debug, Eq, PartialEq, Hash)] pub struct ProviderRecord { - /// Key of the record. - pub key: Key, + /// Key of the record. + pub key: Key, - /// Key of the provider, based on its peer ID. - pub provider: PeerId, + /// Key of the provider, based on its peer ID. + pub provider: PeerId, - /// Cached addresses of the provider. - pub addresses: Vec, + /// Cached addresses of the provider. + pub addresses: Vec, - /// The expiration time of the record. The provider records must always have the expiration - /// time. - pub expires: Instant, + /// The expiration time of the record. The provider records must always have the expiration + /// time. + pub expires: Instant, } impl ProviderRecord { - /// The distance from the provider's peer ID to the provided key. - pub fn distance(&self) -> Distance { - // Note that the record key is raw (opaque bytes). In order to calculate the distance from - // the provider's peer ID to this key we must first hash both. - KademliaKey::from(self.provider).distance(&KademliaKey::new(self.key.clone())) - } - - /// Checks whether the record is expired w.r.t. the given `Instant`. - pub fn is_expired(&self, now: Instant) -> bool { - now >= self.expires - } + /// The distance from the provider's peer ID to the provided key. + pub fn distance(&self) -> Distance { + // Note that the record key is raw (opaque bytes). In order to calculate the distance from + // the provider's peer ID to this key we must first hash both. + KademliaKey::from(self.provider).distance(&KademliaKey::new(self.key.clone())) + } + + /// Checks whether the record is expired w.r.t. the given `Instant`. + pub fn is_expired(&self, now: Instant) -> bool { + now >= self.expires + } } /// A user-facing provider type. #[derive(Clone, Debug, Eq, PartialEq, Hash)] pub struct ContentProvider { - // Peer ID of the provider. - pub peer: PeerId, + // Peer ID of the provider. + pub peer: PeerId, - // Cached addresses of the provider. - pub addresses: Vec, + // Cached addresses of the provider. + pub addresses: Vec, } impl From for KademliaPeer { - fn from(provider: ContentProvider) -> Self { - let mut address_store = AddressStore::new(); - for address in provider.addresses.iter() { - address_store.insert(AddressRecord::from_raw_multiaddr(address.clone())); - } - - Self { - key: KademliaKey::from(provider.peer), - peer: provider.peer, - address_store, - connection: ConnectionType::NotConnected, - } - } + fn from(provider: ContentProvider) -> Self { + let mut address_store = AddressStore::new(); + for address in provider.addresses.iter() { + address_store.insert(AddressRecord::from_raw_multiaddr(address.clone())); + } + + Self { + key: KademliaKey::from(provider.peer), + peer: provider.peer, + address_store, + connection: ConnectionType::NotConnected, + } + } } diff --git a/client/litep2p/src/protocol/libp2p/kademlia/routing_table.rs b/client/litep2p/src/protocol/libp2p/kademlia/routing_table.rs index e012318e..4c203057 100644 --- a/client/litep2p/src/protocol/libp2p/kademlia/routing_table.rs +++ b/client/litep2p/src/protocol/libp2p/kademlia/routing_table.rs @@ -22,15 +22,15 @@ //! Kademlia routing table implementation. use crate::{ - protocol::libp2p::kademlia::{ - bucket::{KBucket, KBucketEntry}, - types::{ConnectionType, Distance, KademliaPeer, Key, U256}, - }, - transport::{ - manager::address::{scores, AddressRecord}, - Endpoint, - }, - PeerId, + protocol::libp2p::kademlia::{ + bucket::{KBucket, KBucketEntry}, + types::{ConnectionType, Distance, KademliaPeer, Key, U256}, + }, + transport::{ + manager::address::{scores, AddressRecord}, + Endpoint, + }, + PeerId, }; use multiaddr::{Multiaddr, Protocol}; @@ -43,11 +43,11 @@ const NUM_BUCKETS: usize = 256; const LOG_TARGET: &str = "litep2p::ipfs::kademlia::routing_table"; pub struct RoutingTable { - /// Local key. - local_key: Key, + /// Local key. + local_key: Key, - /// K-buckets. - buckets: Vec, + /// K-buckets. + buckets: Vec, } /// A (type-safe) index into a `KBucketsTable`, i.e. a non-negative integer in the @@ -56,188 +56,185 @@ pub struct RoutingTable { struct BucketIndex(usize); impl BucketIndex { - /// Creates a new `BucketIndex` for a `Distance`. - /// - /// The given distance is interpreted as the distance from a `local_key` of - /// a `KBucketsTable`. If the distance is zero, `None` is returned, in - /// recognition of the fact that the only key with distance `0` to a - /// `local_key` is the `local_key` itself, which does not belong in any - /// bucket. - fn new(d: &Distance) -> Option { - d.ilog2().map(|i| BucketIndex(i as usize)) - } - - /// Gets the index value as an unsigned integer. - fn get(&self) -> usize { - self.0 - } - - /// Returns the minimum inclusive and maximum inclusive [`Distance`] - /// included in the bucket for this index. - fn _range(&self) -> (Distance, Distance) { - let min = Distance(U256::pow(U256::from(2), U256::from(self.0))); - if self.0 == usize::from(u8::MAX) { - (min, Distance(U256::MAX)) - } else { - let max = Distance(U256::pow(U256::from(2), U256::from(self.0 + 1)) - 1); - (min, max) - } - } - - /// Generates a random distance that falls into the bucket for this index. - #[cfg(test)] - fn rand_distance(&self, rng: &mut impl rand::Rng) -> Distance { - let mut bytes = [0u8; 32]; - let quot = self.0 / 8; - for i in 0..quot { - bytes[31 - i] = rng.gen(); - } - let rem = (self.0 % 8) as u32; - let lower = usize::pow(2, rem); - let upper = usize::pow(2, rem + 1); - bytes[31 - quot] = rng.gen_range(lower..upper) as u8; - Distance(U256::from_big_endian(&bytes)) - } + /// Creates a new `BucketIndex` for a `Distance`. + /// + /// The given distance is interpreted as the distance from a `local_key` of + /// a `KBucketsTable`. If the distance is zero, `None` is returned, in + /// recognition of the fact that the only key with distance `0` to a + /// `local_key` is the `local_key` itself, which does not belong in any + /// bucket. + fn new(d: &Distance) -> Option { + d.ilog2().map(|i| BucketIndex(i as usize)) + } + + /// Gets the index value as an unsigned integer. + fn get(&self) -> usize { + self.0 + } + + /// Returns the minimum inclusive and maximum inclusive [`Distance`] + /// included in the bucket for this index. + fn _range(&self) -> (Distance, Distance) { + let min = Distance(U256::pow(U256::from(2), U256::from(self.0))); + if self.0 == usize::from(u8::MAX) { + (min, Distance(U256::MAX)) + } else { + let max = Distance(U256::pow(U256::from(2), U256::from(self.0 + 1)) - 1); + (min, max) + } + } + + /// Generates a random distance that falls into the bucket for this index. + #[cfg(test)] + fn rand_distance(&self, rng: &mut impl rand::Rng) -> Distance { + let mut bytes = [0u8; 32]; + let quot = self.0 / 8; + for i in 0..quot { + bytes[31 - i] = rng.gen(); + } + let rem = (self.0 % 8) as u32; + let lower = usize::pow(2, rem); + let upper = usize::pow(2, rem + 1); + bytes[31 - quot] = rng.gen_range(lower..upper) as u8; + Distance(U256::from_big_endian(&bytes)) + } } impl RoutingTable { - /// Create new [`RoutingTable`]. - pub fn new(local_key: Key) -> Self { - RoutingTable { - local_key, - buckets: (0..NUM_BUCKETS).map(|_| KBucket::new()).collect(), - } - } - - /// Returns the local key. - pub fn _local_key(&self) -> &Key { - &self.local_key - } - - /// Get an entry for `peer` into a k-bucket. - pub fn entry(&mut self, key: Key) -> KBucketEntry<'_> { - let Some(index) = BucketIndex::new(&self.local_key.distance(&key)) else { - return KBucketEntry::LocalNode; - }; - - self.buckets[index.get()].entry(key) - } - - /// Update the addresses of the peer on dial failures. - /// - /// The addresses are updated with a negative score making them subject to removal. - pub fn on_dial_failure(&mut self, key: Key, addresses: &[Multiaddr]) { - tracing::trace!( - target: LOG_TARGET, - ?key, - ?addresses, - "on dial failure" - ); - - if let KBucketEntry::Occupied(entry) = self.entry(key) { - for address in addresses { - entry.address_store.insert(AddressRecord::from_raw_multiaddr_with_score( - address.clone(), - scores::CONNECTION_FAILURE, - )); - } - } - } - - /// Update the status of the peer on connection established. - /// - /// If the peer exists in the routing table, the connection is set to `Connected`. - /// If the endpoint represents an address we have dialed, the address score - /// is updated in the store of the peer, making it more likely to be used in the future. - pub fn on_connection_established(&mut self, key: Key, endpoint: Endpoint) { - tracing::trace!(target: LOG_TARGET, ?key, ?endpoint, "on connection established"); - - if let KBucketEntry::Occupied(entry) = self.entry(key) { - entry.connection = ConnectionType::Connected; - - if let Endpoint::Dialer { address, .. } = endpoint { - entry.address_store.insert(AddressRecord::from_raw_multiaddr_with_score( - address, - scores::CONNECTION_ESTABLISHED, - )); - } - } - } - - /// Add known peer to [`RoutingTable`]. - /// - /// In order to bootstrap the lookup process, the routing table must be aware of - /// at least one node and of its addresses. - /// - /// The operation is ignored when: - /// - the provided addresses are empty - /// - the local node is being added - /// - the routing table is full - pub fn add_known_peer( - &mut self, - peer: PeerId, - addresses: Vec, - connection: ConnectionType, - ) { - tracing::trace!( - target: LOG_TARGET, - ?peer, - ?addresses, - ?connection, - "add known peer" - ); - - // TODO: https://github.com/paritytech/litep2p/issues/337 this has to be moved elsewhere at some point - let addresses: Vec = addresses - .into_iter() - .filter_map(|address| { - let last = address.iter().last(); - if std::matches!(last, Some(Protocol::P2p(_))) { - Some(address) - } else { - Some(address.with(Protocol::P2p(Multihash::from_bytes(&peer.to_bytes()).ok()?))) - } - }) - .collect(); - - if addresses.is_empty() { - tracing::debug!( - target: LOG_TARGET, - ?peer, - "tried to add zero addresses to the routing table" - ); - return; - } - - match self.entry(Key::from(peer)) { - KBucketEntry::Occupied(entry) => { - entry.push_addresses(addresses); - entry.connection = connection; - } - mut entry @ KBucketEntry::Vacant(_) => { - entry.insert(KademliaPeer::new(peer, addresses, connection)); - } - KBucketEntry::LocalNode => tracing::warn!( - target: LOG_TARGET, - ?peer, - "tried to add local node to routing table", - ), - KBucketEntry::NoSlot => tracing::trace!( - target: LOG_TARGET, - ?peer, - "routing table full, cannot add new entry", - ), - } - } - - /// Get `limit` closest peers to `target` from the k-buckets. - pub fn closest(&mut self, target: &Key, limit: usize) -> Vec { - ClosestBucketsIter::new(self.local_key.distance(&target)) - .flat_map(|index| self.buckets[index.get()].closest_iter(target)) - .take(limit) - .cloned() - .collect() - } + /// Create new [`RoutingTable`]. + pub fn new(local_key: Key) -> Self { + RoutingTable { local_key, buckets: (0..NUM_BUCKETS).map(|_| KBucket::new()).collect() } + } + + /// Returns the local key. + pub fn _local_key(&self) -> &Key { + &self.local_key + } + + /// Get an entry for `peer` into a k-bucket. + pub fn entry(&mut self, key: Key) -> KBucketEntry<'_> { + let Some(index) = BucketIndex::new(&self.local_key.distance(&key)) else { + return KBucketEntry::LocalNode; + }; + + self.buckets[index.get()].entry(key) + } + + /// Update the addresses of the peer on dial failures. + /// + /// The addresses are updated with a negative score making them subject to removal. + pub fn on_dial_failure(&mut self, key: Key, addresses: &[Multiaddr]) { + tracing::trace!( + target: LOG_TARGET, + ?key, + ?addresses, + "on dial failure" + ); + + if let KBucketEntry::Occupied(entry) = self.entry(key) { + for address in addresses { + entry.address_store.insert(AddressRecord::from_raw_multiaddr_with_score( + address.clone(), + scores::CONNECTION_FAILURE, + )); + } + } + } + + /// Update the status of the peer on connection established. + /// + /// If the peer exists in the routing table, the connection is set to `Connected`. + /// If the endpoint represents an address we have dialed, the address score + /// is updated in the store of the peer, making it more likely to be used in the future. + pub fn on_connection_established(&mut self, key: Key, endpoint: Endpoint) { + tracing::trace!(target: LOG_TARGET, ?key, ?endpoint, "on connection established"); + + if let KBucketEntry::Occupied(entry) = self.entry(key) { + entry.connection = ConnectionType::Connected; + + if let Endpoint::Dialer { address, .. } = endpoint { + entry.address_store.insert(AddressRecord::from_raw_multiaddr_with_score( + address, + scores::CONNECTION_ESTABLISHED, + )); + } + } + } + + /// Add known peer to [`RoutingTable`]. + /// + /// In order to bootstrap the lookup process, the routing table must be aware of + /// at least one node and of its addresses. + /// + /// The operation is ignored when: + /// - the provided addresses are empty + /// - the local node is being added + /// - the routing table is full + pub fn add_known_peer( + &mut self, + peer: PeerId, + addresses: Vec, + connection: ConnectionType, + ) { + tracing::trace!( + target: LOG_TARGET, + ?peer, + ?addresses, + ?connection, + "add known peer" + ); + + // TODO: https://github.com/paritytech/litep2p/issues/337 this has to be moved elsewhere at some point + let addresses: Vec = addresses + .into_iter() + .filter_map(|address| { + let last = address.iter().last(); + if std::matches!(last, Some(Protocol::P2p(_))) { + Some(address) + } else { + Some(address.with(Protocol::P2p(Multihash::from_bytes(&peer.to_bytes()).ok()?))) + } + }) + .collect(); + + if addresses.is_empty() { + tracing::debug!( + target: LOG_TARGET, + ?peer, + "tried to add zero addresses to the routing table" + ); + return; + } + + match self.entry(Key::from(peer)) { + KBucketEntry::Occupied(entry) => { + entry.push_addresses(addresses); + entry.connection = connection; + }, + mut entry @ KBucketEntry::Vacant(_) => { + entry.insert(KademliaPeer::new(peer, addresses, connection)); + }, + KBucketEntry::LocalNode => tracing::warn!( + target: LOG_TARGET, + ?peer, + "tried to add local node to routing table", + ), + KBucketEntry::NoSlot => tracing::trace!( + target: LOG_TARGET, + ?peer, + "routing table full, cannot add new entry", + ), + } + } + + /// Get `limit` closest peers to `target` from the k-buckets. + pub fn closest(&mut self, target: &Key, limit: usize) -> Vec { + ClosestBucketsIter::new(self.local_key.distance(&target)) + .flat_map(|index| self.buckets[index.get()].closest_iter(target)) + .take(limit) + .cloned() + .collect() + } } /// An iterator over the bucket indices, in the order determined by the `Distance` of a target from @@ -248,342 +245,334 @@ impl RoutingTable { /// /// [1]: https://github.com/libp2p/rust-libp2p/pull/1117#issuecomment-494694635 struct ClosestBucketsIter { - /// The distance to the `local_key`. - distance: Distance, - /// The current state of the iterator. - state: ClosestBucketsIterState, + /// The distance to the `local_key`. + distance: Distance, + /// The current state of the iterator. + state: ClosestBucketsIterState, } /// Operating states of a `ClosestBucketsIter`. enum ClosestBucketsIterState { - /// The starting state of the iterator yields the first bucket index and - /// then transitions to `ZoomIn`. - Start(BucketIndex), - /// The iterator "zooms in" to to yield the next bucket cotaining nodes that - /// are incrementally closer to the local node but further from the `target`. - /// These buckets are identified by a `1` in the corresponding bit position - /// of the distance bit string. When bucket `0` is reached, the iterator - /// transitions to `ZoomOut`. - ZoomIn(BucketIndex), - /// Once bucket `0` has been reached, the iterator starts "zooming out" - /// to buckets containing nodes that are incrementally further away from - /// both the local key and the target. These are identified by a `0` in - /// the corresponding bit position of the distance bit string. When bucket - /// `255` is reached, the iterator transitions to state `Done`. - ZoomOut(BucketIndex), - /// The iterator is in this state once it has visited all buckets. - Done, + /// The starting state of the iterator yields the first bucket index and + /// then transitions to `ZoomIn`. + Start(BucketIndex), + /// The iterator "zooms in" to to yield the next bucket cotaining nodes that + /// are incrementally closer to the local node but further from the `target`. + /// These buckets are identified by a `1` in the corresponding bit position + /// of the distance bit string. When bucket `0` is reached, the iterator + /// transitions to `ZoomOut`. + ZoomIn(BucketIndex), + /// Once bucket `0` has been reached, the iterator starts "zooming out" + /// to buckets containing nodes that are incrementally further away from + /// both the local key and the target. These are identified by a `0` in + /// the corresponding bit position of the distance bit string. When bucket + /// `255` is reached, the iterator transitions to state `Done`. + ZoomOut(BucketIndex), + /// The iterator is in this state once it has visited all buckets. + Done, } impl ClosestBucketsIter { - fn new(distance: Distance) -> Self { - let state = match BucketIndex::new(&distance) { - Some(i) => ClosestBucketsIterState::Start(i), - None => ClosestBucketsIterState::Start(BucketIndex(0)), - }; - Self { distance, state } - } - - fn next_in(&self, i: BucketIndex) -> Option { - (0..i.get()) - .rev() - .find_map(|i| self.distance.0.bit(i).then_some(BucketIndex(i))) - } - - fn next_out(&self, i: BucketIndex) -> Option { - (i.get() + 1..NUM_BUCKETS).find_map(|i| (!self.distance.0.bit(i)).then_some(BucketIndex(i))) - } + fn new(distance: Distance) -> Self { + let state = match BucketIndex::new(&distance) { + Some(i) => ClosestBucketsIterState::Start(i), + None => ClosestBucketsIterState::Start(BucketIndex(0)), + }; + Self { distance, state } + } + + fn next_in(&self, i: BucketIndex) -> Option { + (0..i.get()) + .rev() + .find_map(|i| self.distance.0.bit(i).then_some(BucketIndex(i))) + } + + fn next_out(&self, i: BucketIndex) -> Option { + (i.get() + 1..NUM_BUCKETS).find_map(|i| (!self.distance.0.bit(i)).then_some(BucketIndex(i))) + } } impl Iterator for ClosestBucketsIter { - type Item = BucketIndex; - - fn next(&mut self) -> Option { - match self.state { - ClosestBucketsIterState::Start(i) => { - self.state = ClosestBucketsIterState::ZoomIn(i); - Some(i) - } - ClosestBucketsIterState::ZoomIn(i) => - if let Some(i) = self.next_in(i) { - self.state = ClosestBucketsIterState::ZoomIn(i); - Some(i) - } else { - let i = BucketIndex(0); - self.state = ClosestBucketsIterState::ZoomOut(i); - Some(i) - }, - ClosestBucketsIterState::ZoomOut(i) => - if let Some(i) = self.next_out(i) { - self.state = ClosestBucketsIterState::ZoomOut(i); - Some(i) - } else { - self.state = ClosestBucketsIterState::Done; - None - }, - ClosestBucketsIterState::Done => None, - } - } + type Item = BucketIndex; + + fn next(&mut self) -> Option { + match self.state { + ClosestBucketsIterState::Start(i) => { + self.state = ClosestBucketsIterState::ZoomIn(i); + Some(i) + }, + ClosestBucketsIterState::ZoomIn(i) => + if let Some(i) = self.next_in(i) { + self.state = ClosestBucketsIterState::ZoomIn(i); + Some(i) + } else { + let i = BucketIndex(0); + self.state = ClosestBucketsIterState::ZoomOut(i); + Some(i) + }, + ClosestBucketsIterState::ZoomOut(i) => + if let Some(i) = self.next_out(i) { + self.state = ClosestBucketsIterState::ZoomOut(i); + Some(i) + } else { + self.state = ClosestBucketsIterState::Done; + None + }, + ClosestBucketsIterState::Done => None, + } + } } #[cfg(test)] mod tests { - use super::*; - use crate::protocol::libp2p::kademlia::types::ConnectionType; - - #[test] - fn closest_peers() { - let own_peer_id = PeerId::random(); - let own_key = Key::from(own_peer_id); - let mut table = RoutingTable::new(own_key.clone()); - - for _ in 0..60 { - let peer = PeerId::random(); - let key = Key::from(peer); - let mut entry = table.entry(key.clone()); - entry.insert(KademliaPeer::new(peer, vec![], ConnectionType::Connected)); - } - - let target = Key::from(PeerId::random()); - let closest = table.closest(&target, 60usize); - let mut prev = None; - - for peer in &closest { - if let Some(value) = prev { - assert!(value < target.distance(&peer.key)); - } - - prev = Some(target.distance(&peer.key)); - } - } - - // generate random peer that falls in to specified k-bucket. - // - // NOTE: the preimage of the generated `Key` doesn't match the `Key` itself - fn random_peer( - rng: &mut impl rand::Rng, - own_key: Key, - bucket_index: usize, - ) -> (Key, PeerId) { - let peer = PeerId::random(); - let distance = BucketIndex(bucket_index).rand_distance(rng); - let key_bytes = own_key.for_distance(distance); - - (Key::from_bytes(key_bytes, peer), peer) - } - - #[test] - fn add_peer_to_empty_table() { - let own_peer_id = PeerId::random(); - let own_key = Key::from(own_peer_id); - let mut table = RoutingTable::new(own_key.clone()); - - // verify that local peer id resolves to special entry - match table.entry(own_key.clone()) { - KBucketEntry::LocalNode => {} - state => panic!("invalid state for `KBucketEntry`: {state:?}"), - }; - - let peer = PeerId::random(); - let key = Key::from(peer); - let mut test = table.entry(key.clone()); - let addresses = vec![]; - - assert!(std::matches!(test, KBucketEntry::Vacant(_))); - test.insert(KademliaPeer::new( - peer, - addresses.clone(), - ConnectionType::Connected, - )); - - match table.entry(key.clone()) { - KBucketEntry::Occupied(entry) => { - assert_eq!(entry.key, key); - assert_eq!(entry.peer, peer); - assert_eq!(entry.addresses(), addresses); - assert_eq!(entry.connection, ConnectionType::Connected); - } - state => panic!("invalid state for `KBucketEntry`: {state:?}"), - }; - - // Set the connection state - match table.entry(key.clone()) { - KBucketEntry::Occupied(entry) => { - entry.connection = ConnectionType::NotConnected; - } - state => panic!("invalid state for `KBucketEntry`: {state:?}"), - } - - match table.entry(key.clone()) { - KBucketEntry::Occupied(entry) => { - assert_eq!(entry.key, key); - assert_eq!(entry.peer, peer); - assert_eq!(entry.addresses(), addresses); - assert_eq!(entry.connection, ConnectionType::NotConnected); - } - state => panic!("invalid state for `KBucketEntry`: {state:?}"), - }; - } - - #[test] - fn full_k_bucket() { - let mut rng = rand::thread_rng(); - let own_peer_id = PeerId::random(); - let own_key = Key::from(own_peer_id); - let mut table = RoutingTable::new(own_key.clone()); - - // add 20 nodes to the same k-bucket - for _ in 0..20 { - let (key, peer) = random_peer(&mut rng, own_key.clone(), 254); - let mut entry = table.entry(key.clone()); - - assert!(std::matches!(entry, KBucketEntry::Vacant(_))); - entry.insert(KademliaPeer::new(peer, vec![], ConnectionType::Connected)); - } - - // try to add another peer and verify the peer is rejected - // because the k-bucket is full of connected nodes - let peer = PeerId::random(); - let distance = BucketIndex(254).rand_distance(&mut rng); - let key_bytes = own_key.for_distance(distance); - let key = Key::from_bytes(key_bytes, peer); - - let entry = table.entry(key.clone()); - assert!(std::matches!(entry, KBucketEntry::NoSlot)); - } - - #[test] - #[ignore] - fn peer_disconnects_and_is_evicted() { - let mut rng = rand::thread_rng(); - let own_peer_id = PeerId::random(); - let own_key = Key::from(own_peer_id); - let mut table = RoutingTable::new(own_key.clone()); - - // add 20 nodes to the same k-bucket - let peers = (0..20) - .map(|_| { - let (key, peer) = random_peer(&mut rng, own_key.clone(), 253); - let mut entry = table.entry(key.clone()); - - assert!(std::matches!(entry, KBucketEntry::Vacant(_))); - entry.insert(KademliaPeer::new(peer, vec![], ConnectionType::Connected)); - - (peer, key) - }) - .collect::>(); - - // try to add another peer and verify the peer is rejected - // because the k-bucket is full of connected nodes - let peer = PeerId::random(); - let distance = BucketIndex(253).rand_distance(&mut rng); - let key_bytes = own_key.for_distance(distance); - let key = Key::from_bytes(key_bytes, peer); - - let entry = table.entry(key.clone()); - assert!(std::matches!(entry, KBucketEntry::NoSlot)); - - // disconnect random peer - match table.entry(peers[3].1.clone()) { - KBucketEntry::Occupied(entry) => { - entry.connection = ConnectionType::NotConnected; - } - _ => panic!("invalid state for node"), - } - - // try to add the previously rejected peer again and verify it's added - let mut entry = table.entry(key.clone()); - assert!(std::matches!(entry, KBucketEntry::Vacant(_))); - entry.insert(KademliaPeer::new( - peer, - vec!["/ip6/::1/tcp/8888".parse().unwrap()], - ConnectionType::CanConnect, - )); - - // verify the node is still there - let entry = table.entry(key.clone()); - let addresses = vec!["/ip6/::1/tcp/8888".parse().unwrap()]; - - match entry { - KBucketEntry::Occupied(entry) => { - assert_eq!(entry.key, key); - assert_eq!(entry.peer, peer); - assert_eq!(entry.addresses(), addresses); - assert_eq!(entry.connection, ConnectionType::CanConnect); - } - state => panic!("invalid state for `KBucketEntry`: {state:?}"), - } - } - - #[test] - fn disconnected_peers_are_not_evicted_if_there_is_capacity() { - let mut rng = rand::thread_rng(); - let own_peer_id = PeerId::random(); - let own_key = Key::from(own_peer_id); - let mut table = RoutingTable::new(own_key.clone()); - - // add 19 disconnected nodes to the same k-bucket - let _peers = (0..19) - .map(|_| { - let (key, peer) = random_peer(&mut rng, own_key.clone(), 252); - let mut entry = table.entry(key.clone()); - - assert!(std::matches!(entry, KBucketEntry::Vacant(_))); - entry.insert(KademliaPeer::new( - peer, - vec![], - ConnectionType::NotConnected, - )); - - (peer, key) - }) - .collect::>(); - - // try to add another peer and verify it's accepted as there is - // still room in the k-bucket for the node - let peer = PeerId::random(); - let distance = BucketIndex(252).rand_distance(&mut rng); - let key_bytes = own_key.for_distance(distance); - let key = Key::from_bytes(key_bytes, peer); - - let mut entry = table.entry(key.clone()); - assert!(std::matches!(entry, KBucketEntry::Vacant(_))); - entry.insert(KademliaPeer::new( - peer, - vec!["/ip6/::1/tcp/8888".parse().unwrap()], - ConnectionType::CanConnect, - )); - } - - #[test] - fn closest_buckets_iterator_set_lsb() { - // Test zooming-in & zooming-out of the iterator using a toy example with set LSB. - let d = Distance(U256::from(0b10011011)); - let mut iter = ClosestBucketsIter::new(d); - // Note that bucket 0 is visited twice. This is, technically, a bug, but to not complicate - // the implementation and keep it consistent with `libp2p` it's kept as is. There are - // virtually no practical consequences of this, because to have bucket 0 populated we have - // to encounter two sha256 hash values differing only in one least significant bit. - let expected_buckets = - vec![7, 4, 3, 1, 0, 0, 2, 5, 6].into_iter().chain(8..=255).map(BucketIndex); - for expected in expected_buckets { - let got = iter.next().unwrap(); - assert_eq!(got, expected); - } - assert!(iter.next().is_none()); - } - - #[test] - fn closest_buckets_iterator_unset_lsb() { - // Test zooming-in & zooming-out of the iterator using a toy example with unset LSB. - let d = Distance(U256::from(0b01011010)); - let mut iter = ClosestBucketsIter::new(d); - let expected_buckets = - vec![6, 4, 3, 1, 0, 2, 5, 7].into_iter().chain(8..=255).map(BucketIndex); - for expected in expected_buckets { - let got = iter.next().unwrap(); - assert_eq!(got, expected); - } - assert!(iter.next().is_none()); - } + use super::*; + use crate::protocol::libp2p::kademlia::types::ConnectionType; + + #[test] + fn closest_peers() { + let own_peer_id = PeerId::random(); + let own_key = Key::from(own_peer_id); + let mut table = RoutingTable::new(own_key.clone()); + + for _ in 0..60 { + let peer = PeerId::random(); + let key = Key::from(peer); + let mut entry = table.entry(key.clone()); + entry.insert(KademliaPeer::new(peer, vec![], ConnectionType::Connected)); + } + + let target = Key::from(PeerId::random()); + let closest = table.closest(&target, 60usize); + let mut prev = None; + + for peer in &closest { + if let Some(value) = prev { + assert!(value < target.distance(&peer.key)); + } + + prev = Some(target.distance(&peer.key)); + } + } + + // generate random peer that falls in to specified k-bucket. + // + // NOTE: the preimage of the generated `Key` doesn't match the `Key` itself + fn random_peer( + rng: &mut impl rand::Rng, + own_key: Key, + bucket_index: usize, + ) -> (Key, PeerId) { + let peer = PeerId::random(); + let distance = BucketIndex(bucket_index).rand_distance(rng); + let key_bytes = own_key.for_distance(distance); + + (Key::from_bytes(key_bytes, peer), peer) + } + + #[test] + fn add_peer_to_empty_table() { + let own_peer_id = PeerId::random(); + let own_key = Key::from(own_peer_id); + let mut table = RoutingTable::new(own_key.clone()); + + // verify that local peer id resolves to special entry + match table.entry(own_key.clone()) { + KBucketEntry::LocalNode => {}, + state => panic!("invalid state for `KBucketEntry`: {state:?}"), + }; + + let peer = PeerId::random(); + let key = Key::from(peer); + let mut test = table.entry(key.clone()); + let addresses = vec![]; + + assert!(std::matches!(test, KBucketEntry::Vacant(_))); + test.insert(KademliaPeer::new(peer, addresses.clone(), ConnectionType::Connected)); + + match table.entry(key.clone()) { + KBucketEntry::Occupied(entry) => { + assert_eq!(entry.key, key); + assert_eq!(entry.peer, peer); + assert_eq!(entry.addresses(), addresses); + assert_eq!(entry.connection, ConnectionType::Connected); + }, + state => panic!("invalid state for `KBucketEntry`: {state:?}"), + }; + + // Set the connection state + match table.entry(key.clone()) { + KBucketEntry::Occupied(entry) => { + entry.connection = ConnectionType::NotConnected; + }, + state => panic!("invalid state for `KBucketEntry`: {state:?}"), + } + + match table.entry(key.clone()) { + KBucketEntry::Occupied(entry) => { + assert_eq!(entry.key, key); + assert_eq!(entry.peer, peer); + assert_eq!(entry.addresses(), addresses); + assert_eq!(entry.connection, ConnectionType::NotConnected); + }, + state => panic!("invalid state for `KBucketEntry`: {state:?}"), + }; + } + + #[test] + fn full_k_bucket() { + let mut rng = rand::thread_rng(); + let own_peer_id = PeerId::random(); + let own_key = Key::from(own_peer_id); + let mut table = RoutingTable::new(own_key.clone()); + + // add 20 nodes to the same k-bucket + for _ in 0..20 { + let (key, peer) = random_peer(&mut rng, own_key.clone(), 254); + let mut entry = table.entry(key.clone()); + + assert!(std::matches!(entry, KBucketEntry::Vacant(_))); + entry.insert(KademliaPeer::new(peer, vec![], ConnectionType::Connected)); + } + + // try to add another peer and verify the peer is rejected + // because the k-bucket is full of connected nodes + let peer = PeerId::random(); + let distance = BucketIndex(254).rand_distance(&mut rng); + let key_bytes = own_key.for_distance(distance); + let key = Key::from_bytes(key_bytes, peer); + + let entry = table.entry(key.clone()); + assert!(std::matches!(entry, KBucketEntry::NoSlot)); + } + + #[test] + #[ignore] + fn peer_disconnects_and_is_evicted() { + let mut rng = rand::thread_rng(); + let own_peer_id = PeerId::random(); + let own_key = Key::from(own_peer_id); + let mut table = RoutingTable::new(own_key.clone()); + + // add 20 nodes to the same k-bucket + let peers = (0..20) + .map(|_| { + let (key, peer) = random_peer(&mut rng, own_key.clone(), 253); + let mut entry = table.entry(key.clone()); + + assert!(std::matches!(entry, KBucketEntry::Vacant(_))); + entry.insert(KademliaPeer::new(peer, vec![], ConnectionType::Connected)); + + (peer, key) + }) + .collect::>(); + + // try to add another peer and verify the peer is rejected + // because the k-bucket is full of connected nodes + let peer = PeerId::random(); + let distance = BucketIndex(253).rand_distance(&mut rng); + let key_bytes = own_key.for_distance(distance); + let key = Key::from_bytes(key_bytes, peer); + + let entry = table.entry(key.clone()); + assert!(std::matches!(entry, KBucketEntry::NoSlot)); + + // disconnect random peer + match table.entry(peers[3].1.clone()) { + KBucketEntry::Occupied(entry) => { + entry.connection = ConnectionType::NotConnected; + }, + _ => panic!("invalid state for node"), + } + + // try to add the previously rejected peer again and verify it's added + let mut entry = table.entry(key.clone()); + assert!(std::matches!(entry, KBucketEntry::Vacant(_))); + entry.insert(KademliaPeer::new( + peer, + vec!["/ip6/::1/tcp/8888".parse().unwrap()], + ConnectionType::CanConnect, + )); + + // verify the node is still there + let entry = table.entry(key.clone()); + let addresses = vec!["/ip6/::1/tcp/8888".parse().unwrap()]; + + match entry { + KBucketEntry::Occupied(entry) => { + assert_eq!(entry.key, key); + assert_eq!(entry.peer, peer); + assert_eq!(entry.addresses(), addresses); + assert_eq!(entry.connection, ConnectionType::CanConnect); + }, + state => panic!("invalid state for `KBucketEntry`: {state:?}"), + } + } + + #[test] + fn disconnected_peers_are_not_evicted_if_there_is_capacity() { + let mut rng = rand::thread_rng(); + let own_peer_id = PeerId::random(); + let own_key = Key::from(own_peer_id); + let mut table = RoutingTable::new(own_key.clone()); + + // add 19 disconnected nodes to the same k-bucket + let _peers = (0..19) + .map(|_| { + let (key, peer) = random_peer(&mut rng, own_key.clone(), 252); + let mut entry = table.entry(key.clone()); + + assert!(std::matches!(entry, KBucketEntry::Vacant(_))); + entry.insert(KademliaPeer::new(peer, vec![], ConnectionType::NotConnected)); + + (peer, key) + }) + .collect::>(); + + // try to add another peer and verify it's accepted as there is + // still room in the k-bucket for the node + let peer = PeerId::random(); + let distance = BucketIndex(252).rand_distance(&mut rng); + let key_bytes = own_key.for_distance(distance); + let key = Key::from_bytes(key_bytes, peer); + + let mut entry = table.entry(key.clone()); + assert!(std::matches!(entry, KBucketEntry::Vacant(_))); + entry.insert(KademliaPeer::new( + peer, + vec!["/ip6/::1/tcp/8888".parse().unwrap()], + ConnectionType::CanConnect, + )); + } + + #[test] + fn closest_buckets_iterator_set_lsb() { + // Test zooming-in & zooming-out of the iterator using a toy example with set LSB. + let d = Distance(U256::from(0b10011011)); + let mut iter = ClosestBucketsIter::new(d); + // Note that bucket 0 is visited twice. This is, technically, a bug, but to not complicate + // the implementation and keep it consistent with `libp2p` it's kept as is. There are + // virtually no practical consequences of this, because to have bucket 0 populated we have + // to encounter two sha256 hash values differing only in one least significant bit. + let expected_buckets = + vec![7, 4, 3, 1, 0, 0, 2, 5, 6].into_iter().chain(8..=255).map(BucketIndex); + for expected in expected_buckets { + let got = iter.next().unwrap(); + assert_eq!(got, expected); + } + assert!(iter.next().is_none()); + } + + #[test] + fn closest_buckets_iterator_unset_lsb() { + // Test zooming-in & zooming-out of the iterator using a toy example with unset LSB. + let d = Distance(U256::from(0b01011010)); + let mut iter = ClosestBucketsIter::new(d); + let expected_buckets = + vec![6, 4, 3, 1, 0, 2, 5, 7].into_iter().chain(8..=255).map(BucketIndex); + for expected in expected_buckets { + let got = iter.next().unwrap(); + assert_eq!(got, expected); + } + assert!(iter.next().is_none()); + } } diff --git a/client/litep2p/src/protocol/libp2p/kademlia/store.rs b/client/litep2p/src/protocol/libp2p/kademlia/store.rs index 914587b9..d2924ba8 100644 --- a/client/litep2p/src/protocol/libp2p/kademlia/store.rs +++ b/client/litep2p/src/protocol/libp2p/kademlia/store.rs @@ -21,24 +21,24 @@ //! Memory store implementation for Kademlia. use crate::{ - protocol::libp2p::kademlia::{ - config::{ - DEFAULT_MAX_PROVIDERS_PER_KEY, DEFAULT_MAX_PROVIDER_ADDRESSES, - DEFAULT_MAX_PROVIDER_KEYS, DEFAULT_MAX_RECORDS, DEFAULT_MAX_RECORD_SIZE_BYTES, - DEFAULT_PROVIDER_REFRESH_INTERVAL, DEFAULT_PROVIDER_TTL, - }, - record::{ContentProvider, Key, ProviderRecord, Record}, - types::Key as KademliaKey, - Quorum, - }, - utils::futures_stream::FuturesStream, - PeerId, + protocol::libp2p::kademlia::{ + config::{ + DEFAULT_MAX_PROVIDERS_PER_KEY, DEFAULT_MAX_PROVIDER_ADDRESSES, + DEFAULT_MAX_PROVIDER_KEYS, DEFAULT_MAX_RECORDS, DEFAULT_MAX_RECORD_SIZE_BYTES, + DEFAULT_PROVIDER_REFRESH_INTERVAL, DEFAULT_PROVIDER_TTL, + }, + record::{ContentProvider, Key, ProviderRecord, Record}, + types::Key as KademliaKey, + Quorum, + }, + utils::futures_stream::FuturesStream, + PeerId, }; use futures::{future::BoxFuture, StreamExt}; use std::{ - collections::{hash_map::Entry, HashMap}, - time::Duration, + collections::{hash_map::Entry, HashMap}, + time::Duration, }; /// Logging target for the file. @@ -47,1066 +47,981 @@ const LOG_TARGET: &str = "litep2p::ipfs::kademlia::store"; /// Memory store events. #[derive(Debug, PartialEq, Eq)] pub enum MemoryStoreAction { - RefreshProvider { - provided_key: Key, - provider: ContentProvider, - quorum: Quorum, - }, + RefreshProvider { provided_key: Key, provider: ContentProvider, quorum: Quorum }, } /// Memory store. pub struct MemoryStore { - /// Local peer ID. Used to track local providers. - local_peer_id: PeerId, - /// Configuration. - config: MemoryStoreConfig, - /// Records. - records: HashMap, - /// Provider records. - provider_keys: HashMap>, - /// Local providers. - local_providers: HashMap, - /// Futures to signal it's time to republish a local provider. - pending_provider_refresh: FuturesStream>, + /// Local peer ID. Used to track local providers. + local_peer_id: PeerId, + /// Configuration. + config: MemoryStoreConfig, + /// Records. + records: HashMap, + /// Provider records. + provider_keys: HashMap>, + /// Local providers. + local_providers: HashMap, + /// Futures to signal it's time to republish a local provider. + pending_provider_refresh: FuturesStream>, } impl MemoryStore { - /// Create new [`MemoryStore`]. - #[cfg(test)] - pub fn new(local_peer_id: PeerId) -> Self { - Self { - local_peer_id, - config: MemoryStoreConfig::default(), - records: HashMap::new(), - provider_keys: HashMap::new(), - local_providers: HashMap::new(), - pending_provider_refresh: FuturesStream::new(), - } - } - - /// Create new [`MemoryStore`] with the provided configuration. - pub fn with_config(local_peer_id: PeerId, config: MemoryStoreConfig) -> Self { - Self { - local_peer_id, - config, - records: HashMap::new(), - provider_keys: HashMap::new(), - local_providers: HashMap::new(), - pending_provider_refresh: FuturesStream::new(), - } - } - - /// Try to get record from local store for `key`. - pub fn get(&mut self, key: &Key) -> Option<&Record> { - let is_expired = self - .records - .get(key) - .is_some_and(|record| record.is_expired(std::time::Instant::now())); - - if is_expired { - self.records.remove(key); - None - } else { - self.records.get(key) - } - } - - /// Store record. - pub fn put(&mut self, record: Record) { - if record.value.len() >= self.config.max_record_size_bytes { - tracing::warn!( - target: LOG_TARGET, - key = ?record.key, - publisher = ?record.publisher, - size = record.value.len(), - max_size = self.config.max_record_size_bytes, - "discarding a DHT record that exceeds the configured size limit", - ); - return; - } - - let len = self.records.len(); - match self.records.entry(record.key.clone()) { - Entry::Occupied(mut entry) => { - // Lean towards the new record. - if let (Some(stored_record_ttl), Some(new_record_ttl)) = - (entry.get().expires, record.expires) - { - if stored_record_ttl > new_record_ttl { - return; - } - } - - entry.insert(record); - } - - Entry::Vacant(entry) => { - if len >= self.config.max_records { - tracing::warn!( - target: LOG_TARGET, - max_records = self.config.max_records, - "discarding a DHT record, because maximum memory store size reached", - ); - return; - } - - entry.insert(record); - } - } - } - - /// Try to get providers from local store for `key`. - /// - /// Returns a non-empty list of providers, if any. - pub fn get_providers(&mut self, key: &Key) -> Vec { - let drop_key = self.provider_keys.get_mut(key).is_some_and(|providers| { - let now = std::time::Instant::now(); - providers.retain(|p| !p.is_expired(now)); - - providers.is_empty() - }); - - if drop_key { - self.provider_keys.remove(key); - - Vec::default() - } else { - self.provider_keys - .get(key) - .cloned() - .unwrap_or_else(Vec::default) - .into_iter() - .map(|p| ContentProvider { - peer: p.provider, - addresses: p.addresses, - }) - .collect() - } - } - - /// Try to add a provider for `key`. If there are already `max_providers_per_key` for - /// this `key`, the new provider is only inserted if its closer to `key` than - /// the furthest already inserted provider. The furthest provider is then discarded. - /// - /// Returns `true` if the provider was added, `false` otherwise. - /// - /// `quorum` is only relevant for local providers. - pub fn put_provider(&mut self, key: Key, provider: ContentProvider) -> bool { - // Make sure we have no more than `max_provider_addresses`. - let provider_record = { - let mut record = ProviderRecord { - key, - provider: provider.peer, - addresses: provider.addresses, - expires: std::time::Instant::now() + self.config.provider_ttl, - }; - record.addresses.truncate(self.config.max_provider_addresses); - record - }; - - let can_insert_new_key = self.provider_keys.len() < self.config.max_provider_keys; - - match self.provider_keys.entry(provider_record.key.clone()) { - Entry::Vacant(entry) => - if can_insert_new_key { - entry.insert(vec![provider_record]); - - true - } else { - tracing::warn!( - target: LOG_TARGET, - max_provider_keys = self.config.max_provider_keys, - "discarding a provider record, because the provider key limit reached", - ); - - false - }, - Entry::Occupied(mut entry) => { - let providers = entry.get_mut(); - - // Providers under every key are sorted by distance from the provided key, with - // equal distances meaning peer IDs (more strictly, their hashes) - // are equal. - let provider_position = - providers.binary_search_by(|p| p.distance().cmp(&provider_record.distance())); - - match provider_position { - Ok(i) => { - // Update the provider in place. - providers[i] = provider_record.clone(); - - true - } - Err(i) => { - // `Err(i)` contains the insertion point. - if i == self.config.max_providers_per_key { - tracing::trace!( - target: LOG_TARGET, - key = ?provider_record.key, - provider = ?provider_record.provider, - max_providers_per_key = self.config.max_providers_per_key, - "discarding a provider record, because it's further than \ - existing `max_providers_per_key`", - ); - - false - } else { - if providers.len() == self.config.max_providers_per_key { - providers.pop(); - } - - providers.insert(i, provider_record.clone()); - - true - } - } - } - } - } - } - - /// Try to add ourself as a provider for `key`. - /// - /// Returns `true` if the provider was added, `false` otherwise. - pub fn put_local_provider(&mut self, key: Key, quorum: Quorum) -> bool { - let provider = ContentProvider { - peer: self.local_peer_id, - // For local providers addresses are populated when replying to `GET_PROVIDERS` - // requests. - addresses: vec![], - }; - - if self.put_provider(key.clone(), provider.clone()) { - let refresh_interval = self.config.provider_refresh_interval; - self.local_providers.insert(key.clone(), (provider, quorum)); - self.pending_provider_refresh.push(Box::pin(async move { - tokio::time::sleep(refresh_interval).await; - key - })); - - true - } else { - false - } - } - - /// Remove local provider for `key`. - pub fn remove_local_provider(&mut self, key: Key) { - if self.local_providers.remove(&key).is_none() { - tracing::warn!(?key, "trying to remove nonexistent local provider",); - return; - }; - - match self.provider_keys.entry(key.clone()) { - Entry::Vacant(_) => { - tracing::error!(?key, "local provider key not found during removal",); - debug_assert!(false); - } - Entry::Occupied(mut entry) => { - let providers = entry.get_mut(); - - // Providers are sorted by distance. - let local_provider_distance = - KademliaKey::from(self.local_peer_id).distance(&KademliaKey::new(key.clone())); - let provider_position = - providers.binary_search_by(|p| p.distance().cmp(&local_provider_distance)); - - match provider_position { - Ok(i) => { - providers.remove(i); - } - Err(_) => { - tracing::error!(?key, "local provider not found during removal",); - debug_assert!(false); - return; - } - } - - if providers.is_empty() { - entry.remove(); - } - } - }; - } - - /// Poll next action from the store. - pub async fn next_action(&mut self) -> Option { - // [`FuturesStream`] never terminates, so `and_then()` below is always triggered. - self.pending_provider_refresh.next().await.and_then(|key| { - if let Some((provider, quorum)) = self.local_providers.get(&key).cloned() { - tracing::trace!( - target: LOG_TARGET, - ?key, - "refresh provider" - ); - - Some(MemoryStoreAction::RefreshProvider { - provided_key: key, - provider, - quorum, - }) - } else { - tracing::trace!( - target: LOG_TARGET, - ?key, - "it's time to refresh a provider, but we do not provide this key anymore", - ); - - None - } - }) - } + /// Create new [`MemoryStore`]. + #[cfg(test)] + pub fn new(local_peer_id: PeerId) -> Self { + Self { + local_peer_id, + config: MemoryStoreConfig::default(), + records: HashMap::new(), + provider_keys: HashMap::new(), + local_providers: HashMap::new(), + pending_provider_refresh: FuturesStream::new(), + } + } + + /// Create new [`MemoryStore`] with the provided configuration. + pub fn with_config(local_peer_id: PeerId, config: MemoryStoreConfig) -> Self { + Self { + local_peer_id, + config, + records: HashMap::new(), + provider_keys: HashMap::new(), + local_providers: HashMap::new(), + pending_provider_refresh: FuturesStream::new(), + } + } + + /// Try to get record from local store for `key`. + pub fn get(&mut self, key: &Key) -> Option<&Record> { + let is_expired = self + .records + .get(key) + .is_some_and(|record| record.is_expired(std::time::Instant::now())); + + if is_expired { + self.records.remove(key); + None + } else { + self.records.get(key) + } + } + + /// Store record. + pub fn put(&mut self, record: Record) { + if record.value.len() >= self.config.max_record_size_bytes { + tracing::warn!( + target: LOG_TARGET, + key = ?record.key, + publisher = ?record.publisher, + size = record.value.len(), + max_size = self.config.max_record_size_bytes, + "discarding a DHT record that exceeds the configured size limit", + ); + return; + } + + let len = self.records.len(); + match self.records.entry(record.key.clone()) { + Entry::Occupied(mut entry) => { + // Lean towards the new record. + if let (Some(stored_record_ttl), Some(new_record_ttl)) = + (entry.get().expires, record.expires) + { + if stored_record_ttl > new_record_ttl { + return; + } + } + + entry.insert(record); + }, + + Entry::Vacant(entry) => { + if len >= self.config.max_records { + tracing::warn!( + target: LOG_TARGET, + max_records = self.config.max_records, + "discarding a DHT record, because maximum memory store size reached", + ); + return; + } + + entry.insert(record); + }, + } + } + + /// Try to get providers from local store for `key`. + /// + /// Returns a non-empty list of providers, if any. + pub fn get_providers(&mut self, key: &Key) -> Vec { + let drop_key = self.provider_keys.get_mut(key).is_some_and(|providers| { + let now = std::time::Instant::now(); + providers.retain(|p| !p.is_expired(now)); + + providers.is_empty() + }); + + if drop_key { + self.provider_keys.remove(key); + + Vec::default() + } else { + self.provider_keys + .get(key) + .cloned() + .unwrap_or_else(Vec::default) + .into_iter() + .map(|p| ContentProvider { peer: p.provider, addresses: p.addresses }) + .collect() + } + } + + /// Try to add a provider for `key`. If there are already `max_providers_per_key` for + /// this `key`, the new provider is only inserted if its closer to `key` than + /// the furthest already inserted provider. The furthest provider is then discarded. + /// + /// Returns `true` if the provider was added, `false` otherwise. + /// + /// `quorum` is only relevant for local providers. + pub fn put_provider(&mut self, key: Key, provider: ContentProvider) -> bool { + // Make sure we have no more than `max_provider_addresses`. + let provider_record = { + let mut record = ProviderRecord { + key, + provider: provider.peer, + addresses: provider.addresses, + expires: std::time::Instant::now() + self.config.provider_ttl, + }; + record.addresses.truncate(self.config.max_provider_addresses); + record + }; + + let can_insert_new_key = self.provider_keys.len() < self.config.max_provider_keys; + + match self.provider_keys.entry(provider_record.key.clone()) { + Entry::Vacant(entry) => + if can_insert_new_key { + entry.insert(vec![provider_record]); + + true + } else { + tracing::warn!( + target: LOG_TARGET, + max_provider_keys = self.config.max_provider_keys, + "discarding a provider record, because the provider key limit reached", + ); + + false + }, + Entry::Occupied(mut entry) => { + let providers = entry.get_mut(); + + // Providers under every key are sorted by distance from the provided key, with + // equal distances meaning peer IDs (more strictly, their hashes) + // are equal. + let provider_position = + providers.binary_search_by(|p| p.distance().cmp(&provider_record.distance())); + + match provider_position { + Ok(i) => { + // Update the provider in place. + providers[i] = provider_record.clone(); + + true + }, + Err(i) => { + // `Err(i)` contains the insertion point. + if i == self.config.max_providers_per_key { + tracing::trace!( + target: LOG_TARGET, + key = ?provider_record.key, + provider = ?provider_record.provider, + max_providers_per_key = self.config.max_providers_per_key, + "discarding a provider record, because it's further than \ + existing `max_providers_per_key`", + ); + + false + } else { + if providers.len() == self.config.max_providers_per_key { + providers.pop(); + } + + providers.insert(i, provider_record.clone()); + + true + } + }, + } + }, + } + } + + /// Try to add ourself as a provider for `key`. + /// + /// Returns `true` if the provider was added, `false` otherwise. + pub fn put_local_provider(&mut self, key: Key, quorum: Quorum) -> bool { + let provider = ContentProvider { + peer: self.local_peer_id, + // For local providers addresses are populated when replying to `GET_PROVIDERS` + // requests. + addresses: vec![], + }; + + if self.put_provider(key.clone(), provider.clone()) { + let refresh_interval = self.config.provider_refresh_interval; + self.local_providers.insert(key.clone(), (provider, quorum)); + self.pending_provider_refresh.push(Box::pin(async move { + tokio::time::sleep(refresh_interval).await; + key + })); + + true + } else { + false + } + } + + /// Remove local provider for `key`. + pub fn remove_local_provider(&mut self, key: Key) { + if self.local_providers.remove(&key).is_none() { + tracing::warn!(?key, "trying to remove nonexistent local provider",); + return; + }; + + match self.provider_keys.entry(key.clone()) { + Entry::Vacant(_) => { + tracing::error!(?key, "local provider key not found during removal",); + debug_assert!(false); + }, + Entry::Occupied(mut entry) => { + let providers = entry.get_mut(); + + // Providers are sorted by distance. + let local_provider_distance = + KademliaKey::from(self.local_peer_id).distance(&KademliaKey::new(key.clone())); + let provider_position = + providers.binary_search_by(|p| p.distance().cmp(&local_provider_distance)); + + match provider_position { + Ok(i) => { + providers.remove(i); + }, + Err(_) => { + tracing::error!(?key, "local provider not found during removal",); + debug_assert!(false); + return; + }, + } + + if providers.is_empty() { + entry.remove(); + } + }, + }; + } + + /// Poll next action from the store. + pub async fn next_action(&mut self) -> Option { + // [`FuturesStream`] never terminates, so `and_then()` below is always triggered. + self.pending_provider_refresh.next().await.and_then(|key| { + if let Some((provider, quorum)) = self.local_providers.get(&key).cloned() { + tracing::trace!( + target: LOG_TARGET, + ?key, + "refresh provider" + ); + + Some(MemoryStoreAction::RefreshProvider { provided_key: key, provider, quorum }) + } else { + tracing::trace!( + target: LOG_TARGET, + ?key, + "it's time to refresh a provider, but we do not provide this key anymore", + ); + + None + } + }) + } } #[derive(Debug)] pub struct MemoryStoreConfig { - /// Maximum number of records to store. - pub max_records: usize, + /// Maximum number of records to store. + pub max_records: usize, - /// Maximum size of a record in bytes. - pub max_record_size_bytes: usize, + /// Maximum size of a record in bytes. + pub max_record_size_bytes: usize, - /// Maximum number of provider keys this node stores. - pub max_provider_keys: usize, + /// Maximum number of provider keys this node stores. + pub max_provider_keys: usize, - /// Maximum number of cached addresses per provider. - pub max_provider_addresses: usize, + /// Maximum number of cached addresses per provider. + pub max_provider_addresses: usize, - /// Maximum number of providers per key. Only providers with peer IDs closest to the key are - /// kept. - pub max_providers_per_key: usize, + /// Maximum number of providers per key. Only providers with peer IDs closest to the key are + /// kept. + pub max_providers_per_key: usize, - /// Local providers republish interval. - pub provider_refresh_interval: Duration, + /// Local providers republish interval. + pub provider_refresh_interval: Duration, - /// Provider record TTL. - pub provider_ttl: Duration, + /// Provider record TTL. + pub provider_ttl: Duration, } impl Default for MemoryStoreConfig { - fn default() -> Self { - Self { - max_records: DEFAULT_MAX_RECORDS, - max_record_size_bytes: DEFAULT_MAX_RECORD_SIZE_BYTES, - max_provider_keys: DEFAULT_MAX_PROVIDER_KEYS, - max_provider_addresses: DEFAULT_MAX_PROVIDER_ADDRESSES, - max_providers_per_key: DEFAULT_MAX_PROVIDERS_PER_KEY, - provider_refresh_interval: DEFAULT_PROVIDER_REFRESH_INTERVAL, - provider_ttl: DEFAULT_PROVIDER_TTL, - } - } + fn default() -> Self { + Self { + max_records: DEFAULT_MAX_RECORDS, + max_record_size_bytes: DEFAULT_MAX_RECORD_SIZE_BYTES, + max_provider_keys: DEFAULT_MAX_PROVIDER_KEYS, + max_provider_addresses: DEFAULT_MAX_PROVIDER_ADDRESSES, + max_providers_per_key: DEFAULT_MAX_PROVIDERS_PER_KEY, + provider_refresh_interval: DEFAULT_PROVIDER_REFRESH_INTERVAL, + provider_ttl: DEFAULT_PROVIDER_TTL, + } + } } #[cfg(test)] mod tests { - use super::*; - use crate::{protocol::libp2p::kademlia::types::Key as KademliaKey, PeerId}; - use multiaddr::multiaddr; - - #[test] - fn put_get_record() { - let mut store = MemoryStore::new(PeerId::random()); - let key = Key::from(vec![1, 2, 3]); - let record = Record::new(key.clone(), vec![4, 5, 6]); - - store.put(record.clone()); - assert_eq!(store.get(&key), Some(&record)); - } - - #[test] - fn max_records() { - let mut store = MemoryStore::with_config( - PeerId::random(), - MemoryStoreConfig { - max_records: 1, - max_record_size_bytes: 1024, - ..Default::default() - }, - ); - - let key1 = Key::from(vec![1, 2, 3]); - let key2 = Key::from(vec![4, 5, 6]); - let record1 = Record::new(key1.clone(), vec![4, 5, 6]); - let record2 = Record::new(key2.clone(), vec![7, 8, 9]); - - store.put(record1.clone()); - store.put(record2.clone()); - - assert_eq!(store.get(&key1), Some(&record1)); - assert_eq!(store.get(&key2), None); - } - - #[test] - fn expired_record_removed() { - let mut store = MemoryStore::new(PeerId::random()); - let key = Key::from(vec![1, 2, 3]); - let record = Record { - key: key.clone(), - value: vec![4, 5, 6], - publisher: None, - expires: Some(std::time::Instant::now() - std::time::Duration::from_secs(5)), - }; - // Record is already expired. - assert!(record.is_expired(std::time::Instant::now())); - - store.put(record.clone()); - assert_eq!(store.get(&key), None); - } - - #[test] - fn new_record_overwrites() { - let mut store = MemoryStore::new(PeerId::random()); - let key = Key::from(vec![1, 2, 3]); - let record1 = Record { - key: key.clone(), - value: vec![4, 5, 6], - publisher: None, - expires: Some(std::time::Instant::now() + std::time::Duration::from_secs(100)), - }; - let record2 = Record { - key: key.clone(), - value: vec![4, 5, 6], - publisher: None, - expires: Some(std::time::Instant::now() + std::time::Duration::from_secs(1000)), - }; - - store.put(record1.clone()); - assert_eq!(store.get(&key), Some(&record1)); - - store.put(record2.clone()); - assert_eq!(store.get(&key), Some(&record2)); - } - - #[test] - fn max_record_size() { - let mut store = MemoryStore::with_config( - PeerId::random(), - MemoryStoreConfig { - max_records: 1024, - max_record_size_bytes: 2, - ..Default::default() - }, - ); - - let key = Key::from(vec![1, 2, 3]); - let record = Record::new(key.clone(), vec![4, 5]); - store.put(record.clone()); - assert_eq!(store.get(&key), None); - - let record = Record::new(key.clone(), vec![4]); - store.put(record.clone()); - assert_eq!(store.get(&key), Some(&record)); - } - - #[test] - fn put_get_provider() { - let mut store = MemoryStore::new(PeerId::random()); - let key = Key::from(vec![1, 2, 3]); - let provider = ContentProvider { - peer: PeerId::random(), - addresses: vec![multiaddr!(Ip4([127, 0, 0, 1]), Tcp(10000u16))], - }; - - store.put_provider(key.clone(), provider.clone()); - assert_eq!(store.get_providers(&key), vec![provider]); - } - - #[test] - fn multiple_providers_per_key() { - let mut store = MemoryStore::new(PeerId::random()); - let key = Key::from(vec![1, 2, 3]); - let provider1 = ContentProvider { - peer: PeerId::random(), - addresses: vec![multiaddr!(Ip4([127, 0, 0, 1]), Tcp(10000u16))], - }; - let provider2 = ContentProvider { - peer: PeerId::random(), - addresses: vec![multiaddr!(Ip4([127, 0, 0, 1]), Tcp(10000u16))], - }; - - store.put_provider(key.clone(), provider1.clone()); - store.put_provider(key.clone(), provider2.clone()); - - let got_providers = store.get_providers(&key); - assert_eq!(got_providers.len(), 2); - assert!(got_providers.contains(&provider1)); - assert!(got_providers.contains(&provider2)); - } - - #[test] - fn providers_sorted_by_distance() { - let mut store = MemoryStore::new(PeerId::random()); - let key = Key::from(vec![1, 2, 3]); - let providers = (0..10) - .map(|_| ContentProvider { - peer: PeerId::random(), - addresses: vec![multiaddr!(Ip4([127, 0, 0, 1]), Tcp(10000u16))], - }) - .collect::>(); - - providers.iter().for_each(|p| { - store.put_provider(key.clone(), p.clone()); - }); - - let sorted_providers = { - let target = KademliaKey::new(key.clone()); - let mut providers = providers; - providers.sort_by(|p1, p2| { - KademliaKey::from(p1.peer) - .distance(&target) - .cmp(&KademliaKey::from(p2.peer).distance(&target)) - }); - providers - }; - - assert_eq!(store.get_providers(&key), sorted_providers); - } - - #[test] - fn max_providers_per_key() { - let mut store = MemoryStore::with_config( - PeerId::random(), - MemoryStoreConfig { - max_providers_per_key: 10, - ..Default::default() - }, - ); - let key = Key::from(vec![1, 2, 3]); - let providers = (0..20) - .map(|_| ContentProvider { - peer: PeerId::random(), - addresses: vec![multiaddr!(Ip4([127, 0, 0, 1]), Tcp(10000u16))], - }) - .collect::>(); - - providers.iter().for_each(|p| { - store.put_provider(key.clone(), p.clone()); - }); - assert_eq!(store.get_providers(&key).len(), 10); - } - - #[test] - fn closest_providers_kept() { - let mut store = MemoryStore::with_config( - PeerId::random(), - MemoryStoreConfig { - max_providers_per_key: 10, - ..Default::default() - }, - ); - let key = Key::from(vec![1, 2, 3]); - let providers = (0..20) - .map(|_| ContentProvider { - peer: PeerId::random(), - addresses: vec![multiaddr!(Ip4([127, 0, 0, 1]), Tcp(10000u16))], - }) - .collect::>(); - - providers.iter().for_each(|p| { - store.put_provider(key.clone(), p.clone()); - }); - - let closest_providers = { - let target = KademliaKey::new(key.clone()); - let mut providers = providers; - providers.sort_by(|p1, p2| { - KademliaKey::from(p1.peer) - .distance(&target) - .cmp(&KademliaKey::from(p2.peer).distance(&target)) - }); - providers.truncate(10); - providers - }; - - assert_eq!(store.get_providers(&key), closest_providers); - } - - #[test] - fn furthest_provider_discarded() { - let mut store = MemoryStore::with_config( - PeerId::random(), - MemoryStoreConfig { - max_providers_per_key: 10, - ..Default::default() - }, - ); - let key = Key::from(vec![1, 2, 3]); - let providers = (0..11) - .map(|_| ContentProvider { - peer: PeerId::random(), - addresses: vec![multiaddr!(Ip4([127, 0, 0, 1]), Tcp(10000u16))], - }) - .collect::>(); - - let sorted_providers = { - let target = KademliaKey::new(key.clone()); - let mut providers = providers; - providers.sort_by(|p1, p2| { - KademliaKey::from(p1.peer) - .distance(&target) - .cmp(&KademliaKey::from(p2.peer).distance(&target)) - }); - providers - }; - - // First 10 providers are inserted. - for i in 0..10 { - assert!(store.put_provider(key.clone(), sorted_providers[i].clone())); - } - assert_eq!(store.get_providers(&key), sorted_providers[..10]); - - // The furthests provider doesn't fit. - assert!(!store.put_provider(key.clone(), sorted_providers[10].clone())); - assert_eq!(store.get_providers(&key), sorted_providers[..10]); - } - - #[test] - fn update_provider_in_place() { - let mut store = MemoryStore::with_config( - PeerId::random(), - MemoryStoreConfig { - max_providers_per_key: 10, - ..Default::default() - }, - ); - let key = Key::from(vec![1, 2, 3]); - let peer_ids = (0..10).map(|_| PeerId::random()).collect::>(); - let peer_id0 = peer_ids[0]; - let providers = peer_ids - .iter() - .map(|peer_id| ContentProvider { - peer: *peer_id, - addresses: vec![multiaddr!(Ip4([127, 0, 0, 1]), Tcp(10000u16))], - }) - .collect::>(); - - providers.iter().for_each(|p| { - store.put_provider(key.clone(), p.clone()); - }); - - let sorted_providers = { - let target = KademliaKey::new(key.clone()); - let mut providers = providers; - providers.sort_by(|p1, p2| { - KademliaKey::from(p1.peer) - .distance(&target) - .cmp(&KademliaKey::from(p2.peer).distance(&target)) - }); - providers - }; - - assert_eq!(store.get_providers(&key), sorted_providers); - - let provider0_new = ContentProvider { - peer: peer_id0, - addresses: vec![multiaddr!(Ip4([192, 168, 0, 1]), Tcp(20000u16))], - }; - - // Provider is updated in place. - assert!(store.put_provider(key.clone(), provider0_new.clone())); - - let providers_new = sorted_providers - .into_iter() - .map(|p| { - if p.peer == peer_id0 { - provider0_new.clone() - } else { - p - } - }) - .collect::>(); - - assert_eq!(store.get_providers(&key), providers_new); - } - - #[tokio::test] - async fn provider_record_expires() { - let mut store = MemoryStore::with_config( - PeerId::random(), - MemoryStoreConfig { - provider_ttl: std::time::Duration::from_secs(1), - ..Default::default() - }, - ); - let key = Key::from(vec![1, 2, 3]); - let provider = ContentProvider { - peer: PeerId::random(), - addresses: vec![multiaddr!(Ip4([127, 0, 0, 1]), Tcp(10000u16))], - }; - - store.put_provider(key.clone(), provider.clone()); - - // Provider does not instantly expire. - assert_eq!(store.get_providers(&key), vec![provider]); - - // Provider expires after 2 seconds. - tokio::time::sleep(Duration::from_secs(2)).await; - assert_eq!(store.get_providers(&key), vec![]); - } - - #[tokio::test] - async fn individual_provider_record_expires() { - let mut store = MemoryStore::with_config( - PeerId::random(), - MemoryStoreConfig { - provider_ttl: std::time::Duration::from_secs(8), - ..Default::default() - }, - ); - let key = Key::from(vec![1, 2, 3]); - let provider1 = ContentProvider { - peer: PeerId::random(), - addresses: vec![multiaddr!(Ip4([127, 0, 0, 1]), Tcp(10000u16))], - }; - let provider2 = ContentProvider { - peer: PeerId::random(), - addresses: vec![multiaddr!(Ip4([127, 0, 0, 1]), Tcp(10000u16))], - }; - - store.put_provider(key.clone(), provider1.clone()); - tokio::time::sleep(Duration::from_secs(4)).await; - store.put_provider(key.clone(), provider2.clone()); - - // Providers do not instantly expire. - let got_providers = store.get_providers(&key); - assert_eq!(got_providers.len(), 2); - assert!(got_providers.contains(&provider1)); - assert!(got_providers.contains(&provider2)); - - // First provider expires. - tokio::time::sleep(Duration::from_secs(6)).await; - assert_eq!(store.get_providers(&key), vec![provider2]); - - // Second provider expires. - tokio::time::sleep(Duration::from_secs(4)).await; - assert_eq!(store.get_providers(&key), vec![]); - } - - #[test] - fn max_addresses_per_provider() { - let mut store = MemoryStore::with_config( - PeerId::random(), - MemoryStoreConfig { - max_provider_addresses: 2, - ..Default::default() - }, - ); - let key = Key::from(vec![1, 2, 3]); - let provider = ContentProvider { - peer: PeerId::random(), - addresses: vec![ - multiaddr!(Ip4([127, 0, 0, 1]), Tcp(10000u16)), - multiaddr!(Ip4([127, 0, 0, 1]), Tcp(10001u16)), - multiaddr!(Ip4([127, 0, 0, 1]), Tcp(10002u16)), - multiaddr!(Ip4([127, 0, 0, 1]), Tcp(10003u16)), - multiaddr!(Ip4([127, 0, 0, 1]), Tcp(10004u16)), - ], - }; - - store.put_provider(key.clone(), provider); - - let got_providers = store.get_providers(&key); - assert_eq!(got_providers.len(), 1); - assert_eq!(got_providers.first().unwrap().addresses.len(), 2); - } - - #[test] - fn max_provider_keys() { - let mut store = MemoryStore::with_config( - PeerId::random(), - MemoryStoreConfig { - max_provider_keys: 2, - ..Default::default() - }, - ); - - let key1 = Key::from(vec![1, 1, 1]); - let provider1 = ContentProvider { - peer: PeerId::random(), - addresses: vec![multiaddr!(Ip4([127, 0, 0, 1]), Tcp(10001u16))], - }; - let key2 = Key::from(vec![2, 2, 2]); - let provider2 = ContentProvider { - peer: PeerId::random(), - addresses: vec![multiaddr!(Ip4([127, 0, 0, 1]), Tcp(10002u16))], - }; - let key3 = Key::from(vec![3, 3, 3]); - let provider3 = ContentProvider { - peer: PeerId::random(), - addresses: vec![multiaddr!(Ip4([127, 0, 0, 1]), Tcp(10003u16))], - }; - - assert!(store.put_provider(key1.clone(), provider1.clone())); - assert!(store.put_provider(key2.clone(), provider2.clone())); - assert!(!store.put_provider(key3.clone(), provider3.clone())); - - assert_eq!(store.get_providers(&key1), vec![provider1]); - assert_eq!(store.get_providers(&key2), vec![provider2]); - assert_eq!(store.get_providers(&key3), vec![]); - } - - #[test] - fn local_provider_registered() { - let local_peer_id = PeerId::random(); - let mut store = MemoryStore::new(local_peer_id); - - let key = Key::from(vec![1, 2, 3]); - let local_provider = ContentProvider { - peer: local_peer_id, - addresses: vec![], - }; - let quorum = Quorum::All; - - assert!(store.local_providers.is_empty()); - assert_eq!(store.pending_provider_refresh.len(), 0); - - assert!(store.put_local_provider(key.clone(), quorum)); - - assert_eq!( - store.local_providers.get(&key), - Some(&(local_provider, quorum)), - ); - assert_eq!(store.pending_provider_refresh.len(), 1); - } - - #[test] - fn local_provider_registered_after_remote_provider() { - let local_peer_id = PeerId::random(); - let mut store = MemoryStore::new(local_peer_id); - - let key = Key::from(vec![1, 2, 3]); - - let remote_peer_id = PeerId::random(); - let remote_provider = ContentProvider { - peer: remote_peer_id, - addresses: vec![multiaddr!(Ip4([192, 168, 0, 1]), Tcp(10000u16))], - }; - - let local_provider = ContentProvider { - peer: local_peer_id, - addresses: vec![], - }; - let quorum = Quorum::N(5.try_into().unwrap()); - - assert!(store.local_providers.is_empty()); - assert_eq!(store.pending_provider_refresh.len(), 0); - - assert!(store.put_provider(key.clone(), remote_provider.clone())); - assert!(store.put_local_provider(key.clone(), quorum)); - - let got_providers = store.get_providers(&key); - assert_eq!(got_providers.len(), 2); - assert!(got_providers.contains(&remote_provider)); - assert!(got_providers.contains(&local_provider)); - - assert_eq!( - store.local_providers.get(&key), - Some(&(local_provider, quorum)) - ); - assert_eq!(store.pending_provider_refresh.len(), 1); - } - - #[test] - fn local_provider_removed() { - let local_peer_id = PeerId::random(); - let mut store = MemoryStore::new(local_peer_id); - - let key = Key::from(vec![1, 2, 3]); - let local_provider = ContentProvider { - peer: local_peer_id, - addresses: vec![], - }; - let quorum = Quorum::One; - - assert!(store.local_providers.is_empty()); - - assert!(store.put_local_provider(key.clone(), quorum)); - - assert_eq!( - store.local_providers.get(&key), - Some(&(local_provider, quorum)) - ); - - store.remove_local_provider(key.clone()); - - assert!(store.get_providers(&key).is_empty()); - assert!(store.local_providers.is_empty()); - } - - #[test] - fn local_provider_removed_when_remote_providers_present() { - let local_peer_id = PeerId::random(); - let mut store = MemoryStore::new(local_peer_id); - - let key = Key::from(vec![1, 2, 3]); - - let remote_peer_id = PeerId::random(); - let remote_provider = ContentProvider { - peer: remote_peer_id, - addresses: vec![multiaddr!(Ip4([192, 168, 0, 1]), Tcp(10000u16))], - }; - - let local_provider = ContentProvider { - peer: local_peer_id, - addresses: vec![], - }; - let quorum = Quorum::One; - - assert!(store.put_provider(key.clone(), remote_provider.clone())); - assert!(store.put_local_provider(key.clone(), quorum)); - - let got_providers = store.get_providers(&key); - assert_eq!(got_providers.len(), 2); - assert!(got_providers.contains(&remote_provider)); - assert!(got_providers.contains(&local_provider)); - - assert_eq!( - store.local_providers.get(&key), - Some(&(local_provider, quorum)) - ); - - store.remove_local_provider(key.clone()); - - assert_eq!(store.get_providers(&key), vec![remote_provider]); - assert!(store.local_providers.is_empty()); - } - - #[tokio::test] - async fn local_provider_refresh() { - let local_peer_id = PeerId::random(); - let mut store = MemoryStore::with_config( - local_peer_id, - MemoryStoreConfig { - provider_refresh_interval: Duration::from_secs(5), - ..Default::default() - }, - ); - - let key = Key::from(vec![1, 2, 3]); - let local_provider = ContentProvider { - peer: local_peer_id, - addresses: vec![], - }; - let quorum = Quorum::One; - - assert!(store.put_local_provider(key.clone(), quorum)); - - assert_eq!(store.get_providers(&key), vec![local_provider.clone()]); - assert_eq!( - store.local_providers.get(&key), - Some(&(local_provider.clone(), quorum)) - ); - - // No actions are instantly generated. - assert!(matches!( - tokio::time::timeout(Duration::from_secs(1), store.next_action()).await, - Err(_), - )); - // The local provider is refreshed. - assert_eq!( - tokio::time::timeout(Duration::from_secs(10), store.next_action()) - .await - .unwrap(), - Some(MemoryStoreAction::RefreshProvider { - provided_key: key, - provider: local_provider, - quorum, - }), - ); - } - - #[tokio::test] - async fn local_provider_inserted_after_remote_provider_refresh() { - let local_peer_id = PeerId::random(); - let mut store = MemoryStore::with_config( - local_peer_id, - MemoryStoreConfig { - provider_refresh_interval: Duration::from_secs(5), - ..Default::default() - }, - ); - - let key = Key::from(vec![1, 2, 3]); - - let remote_peer_id = PeerId::random(); - let remote_provider = ContentProvider { - peer: remote_peer_id, - addresses: vec![multiaddr!(Ip4([192, 168, 0, 1]), Tcp(10000u16))], - }; - - let local_provider = ContentProvider { - peer: local_peer_id, - addresses: vec![], - }; - let quorum = Quorum::One; - - assert!(store.put_provider(key.clone(), remote_provider.clone())); - assert!(store.put_local_provider(key.clone(), quorum)); - - let got_providers = store.get_providers(&key); - assert_eq!(got_providers.len(), 2); - assert!(got_providers.contains(&remote_provider)); - assert!(got_providers.contains(&local_provider)); - - assert_eq!( - store.local_providers.get(&key), - Some(&(local_provider.clone(), quorum)) - ); - - // No actions are instantly generated. - assert!(matches!( - tokio::time::timeout(Duration::from_secs(1), store.next_action()).await, - Err(_), - )); - // The local provider is refreshed. - assert_eq!( - tokio::time::timeout(Duration::from_secs(10), store.next_action()) - .await - .unwrap(), - Some(MemoryStoreAction::RefreshProvider { - provided_key: key, - provider: local_provider, - quorum, - }), - ); - } - - #[tokio::test] - async fn removed_local_provider_not_refreshed() { - let local_peer_id = PeerId::random(); - let mut store = MemoryStore::with_config( - local_peer_id, - MemoryStoreConfig { - provider_refresh_interval: Duration::from_secs(1), - ..Default::default() - }, - ); - - let key = Key::from(vec![1, 2, 3]); - let local_provider = ContentProvider { - peer: local_peer_id, - addresses: vec![], - }; - let quorum = Quorum::One; - - assert!(store.put_local_provider(key.clone(), quorum)); - - assert_eq!(store.get_providers(&key), vec![local_provider.clone()]); - assert_eq!( - store.local_providers.get(&key), - Some(&(local_provider, quorum)) - ); - - store.remove_local_provider(key); - - // The local provider is not refreshed in 10 secs (future fires at 1 sec and yields `None`). - assert_eq!( - tokio::time::timeout(Duration::from_secs(5), store.next_action()).await, - Ok(None), - ); - assert!(matches!( - tokio::time::timeout(Duration::from_secs(5), store.next_action()).await, - Err(_), - )); - } + use super::*; + use crate::{protocol::libp2p::kademlia::types::Key as KademliaKey, PeerId}; + use multiaddr::multiaddr; + + #[test] + fn put_get_record() { + let mut store = MemoryStore::new(PeerId::random()); + let key = Key::from(vec![1, 2, 3]); + let record = Record::new(key.clone(), vec![4, 5, 6]); + + store.put(record.clone()); + assert_eq!(store.get(&key), Some(&record)); + } + + #[test] + fn max_records() { + let mut store = MemoryStore::with_config( + PeerId::random(), + MemoryStoreConfig { max_records: 1, max_record_size_bytes: 1024, ..Default::default() }, + ); + + let key1 = Key::from(vec![1, 2, 3]); + let key2 = Key::from(vec![4, 5, 6]); + let record1 = Record::new(key1.clone(), vec![4, 5, 6]); + let record2 = Record::new(key2.clone(), vec![7, 8, 9]); + + store.put(record1.clone()); + store.put(record2.clone()); + + assert_eq!(store.get(&key1), Some(&record1)); + assert_eq!(store.get(&key2), None); + } + + #[test] + fn expired_record_removed() { + let mut store = MemoryStore::new(PeerId::random()); + let key = Key::from(vec![1, 2, 3]); + let record = Record { + key: key.clone(), + value: vec![4, 5, 6], + publisher: None, + expires: Some(std::time::Instant::now() - std::time::Duration::from_secs(5)), + }; + // Record is already expired. + assert!(record.is_expired(std::time::Instant::now())); + + store.put(record.clone()); + assert_eq!(store.get(&key), None); + } + + #[test] + fn new_record_overwrites() { + let mut store = MemoryStore::new(PeerId::random()); + let key = Key::from(vec![1, 2, 3]); + let record1 = Record { + key: key.clone(), + value: vec![4, 5, 6], + publisher: None, + expires: Some(std::time::Instant::now() + std::time::Duration::from_secs(100)), + }; + let record2 = Record { + key: key.clone(), + value: vec![4, 5, 6], + publisher: None, + expires: Some(std::time::Instant::now() + std::time::Duration::from_secs(1000)), + }; + + store.put(record1.clone()); + assert_eq!(store.get(&key), Some(&record1)); + + store.put(record2.clone()); + assert_eq!(store.get(&key), Some(&record2)); + } + + #[test] + fn max_record_size() { + let mut store = MemoryStore::with_config( + PeerId::random(), + MemoryStoreConfig { max_records: 1024, max_record_size_bytes: 2, ..Default::default() }, + ); + + let key = Key::from(vec![1, 2, 3]); + let record = Record::new(key.clone(), vec![4, 5]); + store.put(record.clone()); + assert_eq!(store.get(&key), None); + + let record = Record::new(key.clone(), vec![4]); + store.put(record.clone()); + assert_eq!(store.get(&key), Some(&record)); + } + + #[test] + fn put_get_provider() { + let mut store = MemoryStore::new(PeerId::random()); + let key = Key::from(vec![1, 2, 3]); + let provider = ContentProvider { + peer: PeerId::random(), + addresses: vec![multiaddr!(Ip4([127, 0, 0, 1]), Tcp(10000u16))], + }; + + store.put_provider(key.clone(), provider.clone()); + assert_eq!(store.get_providers(&key), vec![provider]); + } + + #[test] + fn multiple_providers_per_key() { + let mut store = MemoryStore::new(PeerId::random()); + let key = Key::from(vec![1, 2, 3]); + let provider1 = ContentProvider { + peer: PeerId::random(), + addresses: vec![multiaddr!(Ip4([127, 0, 0, 1]), Tcp(10000u16))], + }; + let provider2 = ContentProvider { + peer: PeerId::random(), + addresses: vec![multiaddr!(Ip4([127, 0, 0, 1]), Tcp(10000u16))], + }; + + store.put_provider(key.clone(), provider1.clone()); + store.put_provider(key.clone(), provider2.clone()); + + let got_providers = store.get_providers(&key); + assert_eq!(got_providers.len(), 2); + assert!(got_providers.contains(&provider1)); + assert!(got_providers.contains(&provider2)); + } + + #[test] + fn providers_sorted_by_distance() { + let mut store = MemoryStore::new(PeerId::random()); + let key = Key::from(vec![1, 2, 3]); + let providers = (0..10) + .map(|_| ContentProvider { + peer: PeerId::random(), + addresses: vec![multiaddr!(Ip4([127, 0, 0, 1]), Tcp(10000u16))], + }) + .collect::>(); + + providers.iter().for_each(|p| { + store.put_provider(key.clone(), p.clone()); + }); + + let sorted_providers = { + let target = KademliaKey::new(key.clone()); + let mut providers = providers; + providers.sort_by(|p1, p2| { + KademliaKey::from(p1.peer) + .distance(&target) + .cmp(&KademliaKey::from(p2.peer).distance(&target)) + }); + providers + }; + + assert_eq!(store.get_providers(&key), sorted_providers); + } + + #[test] + fn max_providers_per_key() { + let mut store = MemoryStore::with_config( + PeerId::random(), + MemoryStoreConfig { max_providers_per_key: 10, ..Default::default() }, + ); + let key = Key::from(vec![1, 2, 3]); + let providers = (0..20) + .map(|_| ContentProvider { + peer: PeerId::random(), + addresses: vec![multiaddr!(Ip4([127, 0, 0, 1]), Tcp(10000u16))], + }) + .collect::>(); + + providers.iter().for_each(|p| { + store.put_provider(key.clone(), p.clone()); + }); + assert_eq!(store.get_providers(&key).len(), 10); + } + + #[test] + fn closest_providers_kept() { + let mut store = MemoryStore::with_config( + PeerId::random(), + MemoryStoreConfig { max_providers_per_key: 10, ..Default::default() }, + ); + let key = Key::from(vec![1, 2, 3]); + let providers = (0..20) + .map(|_| ContentProvider { + peer: PeerId::random(), + addresses: vec![multiaddr!(Ip4([127, 0, 0, 1]), Tcp(10000u16))], + }) + .collect::>(); + + providers.iter().for_each(|p| { + store.put_provider(key.clone(), p.clone()); + }); + + let closest_providers = { + let target = KademliaKey::new(key.clone()); + let mut providers = providers; + providers.sort_by(|p1, p2| { + KademliaKey::from(p1.peer) + .distance(&target) + .cmp(&KademliaKey::from(p2.peer).distance(&target)) + }); + providers.truncate(10); + providers + }; + + assert_eq!(store.get_providers(&key), closest_providers); + } + + #[test] + fn furthest_provider_discarded() { + let mut store = MemoryStore::with_config( + PeerId::random(), + MemoryStoreConfig { max_providers_per_key: 10, ..Default::default() }, + ); + let key = Key::from(vec![1, 2, 3]); + let providers = (0..11) + .map(|_| ContentProvider { + peer: PeerId::random(), + addresses: vec![multiaddr!(Ip4([127, 0, 0, 1]), Tcp(10000u16))], + }) + .collect::>(); + + let sorted_providers = { + let target = KademliaKey::new(key.clone()); + let mut providers = providers; + providers.sort_by(|p1, p2| { + KademliaKey::from(p1.peer) + .distance(&target) + .cmp(&KademliaKey::from(p2.peer).distance(&target)) + }); + providers + }; + + // First 10 providers are inserted. + for i in 0..10 { + assert!(store.put_provider(key.clone(), sorted_providers[i].clone())); + } + assert_eq!(store.get_providers(&key), sorted_providers[..10]); + + // The furthests provider doesn't fit. + assert!(!store.put_provider(key.clone(), sorted_providers[10].clone())); + assert_eq!(store.get_providers(&key), sorted_providers[..10]); + } + + #[test] + fn update_provider_in_place() { + let mut store = MemoryStore::with_config( + PeerId::random(), + MemoryStoreConfig { max_providers_per_key: 10, ..Default::default() }, + ); + let key = Key::from(vec![1, 2, 3]); + let peer_ids = (0..10).map(|_| PeerId::random()).collect::>(); + let peer_id0 = peer_ids[0]; + let providers = peer_ids + .iter() + .map(|peer_id| ContentProvider { + peer: *peer_id, + addresses: vec![multiaddr!(Ip4([127, 0, 0, 1]), Tcp(10000u16))], + }) + .collect::>(); + + providers.iter().for_each(|p| { + store.put_provider(key.clone(), p.clone()); + }); + + let sorted_providers = { + let target = KademliaKey::new(key.clone()); + let mut providers = providers; + providers.sort_by(|p1, p2| { + KademliaKey::from(p1.peer) + .distance(&target) + .cmp(&KademliaKey::from(p2.peer).distance(&target)) + }); + providers + }; + + assert_eq!(store.get_providers(&key), sorted_providers); + + let provider0_new = ContentProvider { + peer: peer_id0, + addresses: vec![multiaddr!(Ip4([192, 168, 0, 1]), Tcp(20000u16))], + }; + + // Provider is updated in place. + assert!(store.put_provider(key.clone(), provider0_new.clone())); + + let providers_new = sorted_providers + .into_iter() + .map(|p| if p.peer == peer_id0 { provider0_new.clone() } else { p }) + .collect::>(); + + assert_eq!(store.get_providers(&key), providers_new); + } + + #[tokio::test] + async fn provider_record_expires() { + let mut store = MemoryStore::with_config( + PeerId::random(), + MemoryStoreConfig { + provider_ttl: std::time::Duration::from_secs(1), + ..Default::default() + }, + ); + let key = Key::from(vec![1, 2, 3]); + let provider = ContentProvider { + peer: PeerId::random(), + addresses: vec![multiaddr!(Ip4([127, 0, 0, 1]), Tcp(10000u16))], + }; + + store.put_provider(key.clone(), provider.clone()); + + // Provider does not instantly expire. + assert_eq!(store.get_providers(&key), vec![provider]); + + // Provider expires after 2 seconds. + tokio::time::sleep(Duration::from_secs(2)).await; + assert_eq!(store.get_providers(&key), vec![]); + } + + #[tokio::test] + async fn individual_provider_record_expires() { + let mut store = MemoryStore::with_config( + PeerId::random(), + MemoryStoreConfig { + provider_ttl: std::time::Duration::from_secs(8), + ..Default::default() + }, + ); + let key = Key::from(vec![1, 2, 3]); + let provider1 = ContentProvider { + peer: PeerId::random(), + addresses: vec![multiaddr!(Ip4([127, 0, 0, 1]), Tcp(10000u16))], + }; + let provider2 = ContentProvider { + peer: PeerId::random(), + addresses: vec![multiaddr!(Ip4([127, 0, 0, 1]), Tcp(10000u16))], + }; + + store.put_provider(key.clone(), provider1.clone()); + tokio::time::sleep(Duration::from_secs(4)).await; + store.put_provider(key.clone(), provider2.clone()); + + // Providers do not instantly expire. + let got_providers = store.get_providers(&key); + assert_eq!(got_providers.len(), 2); + assert!(got_providers.contains(&provider1)); + assert!(got_providers.contains(&provider2)); + + // First provider expires. + tokio::time::sleep(Duration::from_secs(6)).await; + assert_eq!(store.get_providers(&key), vec![provider2]); + + // Second provider expires. + tokio::time::sleep(Duration::from_secs(4)).await; + assert_eq!(store.get_providers(&key), vec![]); + } + + #[test] + fn max_addresses_per_provider() { + let mut store = MemoryStore::with_config( + PeerId::random(), + MemoryStoreConfig { max_provider_addresses: 2, ..Default::default() }, + ); + let key = Key::from(vec![1, 2, 3]); + let provider = ContentProvider { + peer: PeerId::random(), + addresses: vec![ + multiaddr!(Ip4([127, 0, 0, 1]), Tcp(10000u16)), + multiaddr!(Ip4([127, 0, 0, 1]), Tcp(10001u16)), + multiaddr!(Ip4([127, 0, 0, 1]), Tcp(10002u16)), + multiaddr!(Ip4([127, 0, 0, 1]), Tcp(10003u16)), + multiaddr!(Ip4([127, 0, 0, 1]), Tcp(10004u16)), + ], + }; + + store.put_provider(key.clone(), provider); + + let got_providers = store.get_providers(&key); + assert_eq!(got_providers.len(), 1); + assert_eq!(got_providers.first().unwrap().addresses.len(), 2); + } + + #[test] + fn max_provider_keys() { + let mut store = MemoryStore::with_config( + PeerId::random(), + MemoryStoreConfig { max_provider_keys: 2, ..Default::default() }, + ); + + let key1 = Key::from(vec![1, 1, 1]); + let provider1 = ContentProvider { + peer: PeerId::random(), + addresses: vec![multiaddr!(Ip4([127, 0, 0, 1]), Tcp(10001u16))], + }; + let key2 = Key::from(vec![2, 2, 2]); + let provider2 = ContentProvider { + peer: PeerId::random(), + addresses: vec![multiaddr!(Ip4([127, 0, 0, 1]), Tcp(10002u16))], + }; + let key3 = Key::from(vec![3, 3, 3]); + let provider3 = ContentProvider { + peer: PeerId::random(), + addresses: vec![multiaddr!(Ip4([127, 0, 0, 1]), Tcp(10003u16))], + }; + + assert!(store.put_provider(key1.clone(), provider1.clone())); + assert!(store.put_provider(key2.clone(), provider2.clone())); + assert!(!store.put_provider(key3.clone(), provider3.clone())); + + assert_eq!(store.get_providers(&key1), vec![provider1]); + assert_eq!(store.get_providers(&key2), vec![provider2]); + assert_eq!(store.get_providers(&key3), vec![]); + } + + #[test] + fn local_provider_registered() { + let local_peer_id = PeerId::random(); + let mut store = MemoryStore::new(local_peer_id); + + let key = Key::from(vec![1, 2, 3]); + let local_provider = ContentProvider { peer: local_peer_id, addresses: vec![] }; + let quorum = Quorum::All; + + assert!(store.local_providers.is_empty()); + assert_eq!(store.pending_provider_refresh.len(), 0); + + assert!(store.put_local_provider(key.clone(), quorum)); + + assert_eq!(store.local_providers.get(&key), Some(&(local_provider, quorum)),); + assert_eq!(store.pending_provider_refresh.len(), 1); + } + + #[test] + fn local_provider_registered_after_remote_provider() { + let local_peer_id = PeerId::random(); + let mut store = MemoryStore::new(local_peer_id); + + let key = Key::from(vec![1, 2, 3]); + + let remote_peer_id = PeerId::random(); + let remote_provider = ContentProvider { + peer: remote_peer_id, + addresses: vec![multiaddr!(Ip4([192, 168, 0, 1]), Tcp(10000u16))], + }; + + let local_provider = ContentProvider { peer: local_peer_id, addresses: vec![] }; + let quorum = Quorum::N(5.try_into().unwrap()); + + assert!(store.local_providers.is_empty()); + assert_eq!(store.pending_provider_refresh.len(), 0); + + assert!(store.put_provider(key.clone(), remote_provider.clone())); + assert!(store.put_local_provider(key.clone(), quorum)); + + let got_providers = store.get_providers(&key); + assert_eq!(got_providers.len(), 2); + assert!(got_providers.contains(&remote_provider)); + assert!(got_providers.contains(&local_provider)); + + assert_eq!(store.local_providers.get(&key), Some(&(local_provider, quorum))); + assert_eq!(store.pending_provider_refresh.len(), 1); + } + + #[test] + fn local_provider_removed() { + let local_peer_id = PeerId::random(); + let mut store = MemoryStore::new(local_peer_id); + + let key = Key::from(vec![1, 2, 3]); + let local_provider = ContentProvider { peer: local_peer_id, addresses: vec![] }; + let quorum = Quorum::One; + + assert!(store.local_providers.is_empty()); + + assert!(store.put_local_provider(key.clone(), quorum)); + + assert_eq!(store.local_providers.get(&key), Some(&(local_provider, quorum))); + + store.remove_local_provider(key.clone()); + + assert!(store.get_providers(&key).is_empty()); + assert!(store.local_providers.is_empty()); + } + + #[test] + fn local_provider_removed_when_remote_providers_present() { + let local_peer_id = PeerId::random(); + let mut store = MemoryStore::new(local_peer_id); + + let key = Key::from(vec![1, 2, 3]); + + let remote_peer_id = PeerId::random(); + let remote_provider = ContentProvider { + peer: remote_peer_id, + addresses: vec![multiaddr!(Ip4([192, 168, 0, 1]), Tcp(10000u16))], + }; + + let local_provider = ContentProvider { peer: local_peer_id, addresses: vec![] }; + let quorum = Quorum::One; + + assert!(store.put_provider(key.clone(), remote_provider.clone())); + assert!(store.put_local_provider(key.clone(), quorum)); + + let got_providers = store.get_providers(&key); + assert_eq!(got_providers.len(), 2); + assert!(got_providers.contains(&remote_provider)); + assert!(got_providers.contains(&local_provider)); + + assert_eq!(store.local_providers.get(&key), Some(&(local_provider, quorum))); + + store.remove_local_provider(key.clone()); + + assert_eq!(store.get_providers(&key), vec![remote_provider]); + assert!(store.local_providers.is_empty()); + } + + #[tokio::test] + async fn local_provider_refresh() { + let local_peer_id = PeerId::random(); + let mut store = MemoryStore::with_config( + local_peer_id, + MemoryStoreConfig { + provider_refresh_interval: Duration::from_secs(5), + ..Default::default() + }, + ); + + let key = Key::from(vec![1, 2, 3]); + let local_provider = ContentProvider { peer: local_peer_id, addresses: vec![] }; + let quorum = Quorum::One; + + assert!(store.put_local_provider(key.clone(), quorum)); + + assert_eq!(store.get_providers(&key), vec![local_provider.clone()]); + assert_eq!(store.local_providers.get(&key), Some(&(local_provider.clone(), quorum))); + + // No actions are instantly generated. + assert!(matches!( + tokio::time::timeout(Duration::from_secs(1), store.next_action()).await, + Err(_), + )); + // The local provider is refreshed. + assert_eq!( + tokio::time::timeout(Duration::from_secs(10), store.next_action()) + .await + .unwrap(), + Some(MemoryStoreAction::RefreshProvider { + provided_key: key, + provider: local_provider, + quorum, + }), + ); + } + + #[tokio::test] + async fn local_provider_inserted_after_remote_provider_refresh() { + let local_peer_id = PeerId::random(); + let mut store = MemoryStore::with_config( + local_peer_id, + MemoryStoreConfig { + provider_refresh_interval: Duration::from_secs(5), + ..Default::default() + }, + ); + + let key = Key::from(vec![1, 2, 3]); + + let remote_peer_id = PeerId::random(); + let remote_provider = ContentProvider { + peer: remote_peer_id, + addresses: vec![multiaddr!(Ip4([192, 168, 0, 1]), Tcp(10000u16))], + }; + + let local_provider = ContentProvider { peer: local_peer_id, addresses: vec![] }; + let quorum = Quorum::One; + + assert!(store.put_provider(key.clone(), remote_provider.clone())); + assert!(store.put_local_provider(key.clone(), quorum)); + + let got_providers = store.get_providers(&key); + assert_eq!(got_providers.len(), 2); + assert!(got_providers.contains(&remote_provider)); + assert!(got_providers.contains(&local_provider)); + + assert_eq!(store.local_providers.get(&key), Some(&(local_provider.clone(), quorum))); + + // No actions are instantly generated. + assert!(matches!( + tokio::time::timeout(Duration::from_secs(1), store.next_action()).await, + Err(_), + )); + // The local provider is refreshed. + assert_eq!( + tokio::time::timeout(Duration::from_secs(10), store.next_action()) + .await + .unwrap(), + Some(MemoryStoreAction::RefreshProvider { + provided_key: key, + provider: local_provider, + quorum, + }), + ); + } + + #[tokio::test] + async fn removed_local_provider_not_refreshed() { + let local_peer_id = PeerId::random(); + let mut store = MemoryStore::with_config( + local_peer_id, + MemoryStoreConfig { + provider_refresh_interval: Duration::from_secs(1), + ..Default::default() + }, + ); + + let key = Key::from(vec![1, 2, 3]); + let local_provider = ContentProvider { peer: local_peer_id, addresses: vec![] }; + let quorum = Quorum::One; + + assert!(store.put_local_provider(key.clone(), quorum)); + + assert_eq!(store.get_providers(&key), vec![local_provider.clone()]); + assert_eq!(store.local_providers.get(&key), Some(&(local_provider, quorum))); + + store.remove_local_provider(key); + + // The local provider is not refreshed in 10 secs (future fires at 1 sec and yields `None`). + assert_eq!( + tokio::time::timeout(Duration::from_secs(5), store.next_action()).await, + Ok(None), + ); + assert!(matches!( + tokio::time::timeout(Duration::from_secs(5), store.next_action()).await, + Err(_), + )); + } } diff --git a/client/litep2p/src/protocol/libp2p/kademlia/types.rs b/client/litep2p/src/protocol/libp2p/kademlia/types.rs index b954072e..2cea3459 100644 --- a/client/litep2p/src/protocol/libp2p/kademlia/types.rs +++ b/client/litep2p/src/protocol/libp2p/kademlia/types.rs @@ -25,9 +25,9 @@ //! Kademlia types. use crate::{ - protocol::libp2p::kademlia::schema, - transport::manager::address::{AddressRecord, AddressStore}, - PeerId, + protocol::libp2p::kademlia::schema, + transport::manager::address::{AddressRecord, AddressStore}, + PeerId, }; use multiaddr::Multiaddr; @@ -41,16 +41,16 @@ use sha2::{digest::generic_array::typenum::U32, Digest, Sha256}; use uint::*; use std::{ - borrow::Borrow, - hash::{Hash, Hasher}, + borrow::Borrow, + hash::{Hash, Hasher}, }; /// Maximum number of addresses to store for a peer. const MAX_ADDRESSES: usize = 32; construct_uint! { - /// 256-bit unsigned integer. - pub(super) struct U256(4); + /// 256-bit unsigned integer. + pub(super) struct U256(4); } /// A `Key` in the DHT keyspace with preserved preimage. @@ -62,93 +62,93 @@ construct_uint! { /// the hash digests, interpreted as an integer. See [`Key::distance`]. #[derive(Clone, Debug)] pub struct Key { - preimage: T, - bytes: KeyBytes, + preimage: T, + bytes: KeyBytes, } impl Key { - /// Constructs a new `Key` by running the given value through a random - /// oracle. - /// - /// The preimage of type `T` is preserved. - /// See [`Key::into_preimage`] for more details. - pub fn new(preimage: T) -> Key - where - T: Borrow<[u8]>, - { - let bytes = KeyBytes::new(preimage.borrow()); - Key { preimage, bytes } - } - - /// Convert [`Key`] into its preimage. - pub fn into_preimage(self) -> T { - self.preimage - } - - /// Computes the distance of the keys according to the XOR metric. - pub fn distance(&self, other: &U) -> Distance - where - U: AsRef, - { - self.bytes.distance(other) - } - - /// Returns the uniquely determined key with the given distance to `self`. - /// - /// This implements the following equivalence: - /// - /// `self xor other = distance <==> other = self xor distance` - #[cfg(test)] - pub fn for_distance(&self, d: Distance) -> KeyBytes { - self.bytes.for_distance(d) - } - - /// Generate key from `KeyBytes` with a random preimage. - /// - /// Only used for testing - #[cfg(test)] - pub fn from_bytes(bytes: KeyBytes, preimage: T) -> Key { - Self { bytes, preimage } - } + /// Constructs a new `Key` by running the given value through a random + /// oracle. + /// + /// The preimage of type `T` is preserved. + /// See [`Key::into_preimage`] for more details. + pub fn new(preimage: T) -> Key + where + T: Borrow<[u8]>, + { + let bytes = KeyBytes::new(preimage.borrow()); + Key { preimage, bytes } + } + + /// Convert [`Key`] into its preimage. + pub fn into_preimage(self) -> T { + self.preimage + } + + /// Computes the distance of the keys according to the XOR metric. + pub fn distance(&self, other: &U) -> Distance + where + U: AsRef, + { + self.bytes.distance(other) + } + + /// Returns the uniquely determined key with the given distance to `self`. + /// + /// This implements the following equivalence: + /// + /// `self xor other = distance <==> other = self xor distance` + #[cfg(test)] + pub fn for_distance(&self, d: Distance) -> KeyBytes { + self.bytes.for_distance(d) + } + + /// Generate key from `KeyBytes` with a random preimage. + /// + /// Only used for testing + #[cfg(test)] + pub fn from_bytes(bytes: KeyBytes, preimage: T) -> Key { + Self { bytes, preimage } + } } impl From> for KeyBytes { - fn from(key: Key) -> KeyBytes { - key.bytes - } + fn from(key: Key) -> KeyBytes { + key.bytes + } } impl From for Key { - fn from(p: PeerId) -> Self { - let bytes = KeyBytes(Sha256::digest(p.to_bytes())); - Key { preimage: p, bytes } - } + fn from(p: PeerId) -> Self { + let bytes = KeyBytes(Sha256::digest(p.to_bytes())); + Key { preimage: p, bytes } + } } impl From> for Key> { - fn from(b: Vec) -> Self { - Key::new(b) - } + fn from(b: Vec) -> Self { + Key::new(b) + } } impl AsRef for Key { - fn as_ref(&self) -> &KeyBytes { - &self.bytes - } + fn as_ref(&self) -> &KeyBytes { + &self.bytes + } } impl PartialEq> for Key { - fn eq(&self, other: &Key) -> bool { - self.bytes == other.bytes - } + fn eq(&self, other: &Key) -> bool { + self.bytes == other.bytes + } } impl Eq for Key {} impl Hash for Key { - fn hash(&self, state: &mut H) { - self.bytes.0.hash(state); - } + fn hash(&self, state: &mut H) { + self.bytes.0.hash(state); + } } /// The raw bytes of a key in the DHT keyspace. @@ -159,47 +159,47 @@ impl Hash for Key { pub struct KeyBytes(GenericArray); impl KeyBytes { - /// Creates a new key in the DHT keyspace by running the given - /// value through a random oracle. - pub fn new(value: T) -> Self - where - T: Borrow<[u8]>, - { - KeyBytes(Sha256::digest(value.borrow())) - } - - /// Computes the distance of the keys according to the XOR metric. - #[allow(deprecated)] - // TODO: remove `#[allow(deprecated)] once sha2-0.11 is released. - // See https://github.com/paritytech/litep2p/issues/449. - pub fn distance(&self, other: &U) -> Distance - where - U: AsRef, - { - let a = U256::from_big_endian(self.0.as_slice()); - let b = U256::from_big_endian(other.as_ref().0.as_slice()); - Distance(a ^ b) - } - - /// Returns the uniquely determined key with the given distance to `self`. - /// - /// This implements the following equivalence: - /// - /// `self xor other = distance <==> other = self xor distance` - #[cfg(test)] - #[allow(deprecated)] - // TODO: remove `#[allow(deprecated)] once sha2-0.11 is released. - // See https://github.com/paritytech/litep2p/issues/449. - pub fn for_distance(&self, d: Distance) -> KeyBytes { - let key_int = U256::from_big_endian(self.0.as_slice()) ^ d.0; - KeyBytes(GenericArray::from(key_int.to_big_endian())) - } + /// Creates a new key in the DHT keyspace by running the given + /// value through a random oracle. + pub fn new(value: T) -> Self + where + T: Borrow<[u8]>, + { + KeyBytes(Sha256::digest(value.borrow())) + } + + /// Computes the distance of the keys according to the XOR metric. + #[allow(deprecated)] + // TODO: remove `#[allow(deprecated)] once sha2-0.11 is released. + // See https://github.com/paritytech/litep2p/issues/449. + pub fn distance(&self, other: &U) -> Distance + where + U: AsRef, + { + let a = U256::from_big_endian(self.0.as_slice()); + let b = U256::from_big_endian(other.as_ref().0.as_slice()); + Distance(a ^ b) + } + + /// Returns the uniquely determined key with the given distance to `self`. + /// + /// This implements the following equivalence: + /// + /// `self xor other = distance <==> other = self xor distance` + #[cfg(test)] + #[allow(deprecated)] + // TODO: remove `#[allow(deprecated)] once sha2-0.11 is released. + // See https://github.com/paritytech/litep2p/issues/449. + pub fn for_distance(&self, d: Distance) -> KeyBytes { + let key_int = U256::from_big_endian(self.0.as_slice()) ^ d.0; + KeyBytes(GenericArray::from(key_int.to_big_endian())) + } } impl AsRef for KeyBytes { - fn as_ref(&self) -> &KeyBytes { - self - } + fn as_ref(&self) -> &KeyBytes { + self + } } /// A distance between two keys in the DHT keyspace. @@ -207,135 +207,130 @@ impl AsRef for KeyBytes { pub struct Distance(pub(super) U256); impl Distance { - /// Returns the integer part of the base 2 logarithm of the [`Distance`]. - /// - /// Returns `None` if the distance is zero. - pub fn ilog2(&self) -> Option { - (256 - self.0.leading_zeros()).checked_sub(1) - } + /// Returns the integer part of the base 2 logarithm of the [`Distance`]. + /// + /// Returns `None` if the distance is zero. + pub fn ilog2(&self) -> Option { + (256 - self.0.leading_zeros()).checked_sub(1) + } } /// Connection type to peer. #[derive(Debug, Copy, Clone, PartialEq, Eq)] pub enum ConnectionType { - /// Sender does not have a connection to peer. - NotConnected, + /// Sender does not have a connection to peer. + NotConnected, - /// Sender is connected to the peer. - Connected, + /// Sender is connected to the peer. + Connected, - /// Sender has recently been connected to the peer. - CanConnect, + /// Sender has recently been connected to the peer. + CanConnect, - /// Sender is unable to connect to the peer. - CannotConnect, + /// Sender is unable to connect to the peer. + CannotConnect, } impl TryFrom for ConnectionType { - type Error = (); - - fn try_from(value: i32) -> Result { - match value { - 0 => Ok(ConnectionType::NotConnected), - 1 => Ok(ConnectionType::Connected), - 2 => Ok(ConnectionType::CanConnect), - 3 => Ok(ConnectionType::CannotConnect), - _ => Err(()), - } - } + type Error = (); + + fn try_from(value: i32) -> Result { + match value { + 0 => Ok(ConnectionType::NotConnected), + 1 => Ok(ConnectionType::Connected), + 2 => Ok(ConnectionType::CanConnect), + 3 => Ok(ConnectionType::CannotConnect), + _ => Err(()), + } + } } impl From for i32 { - fn from(connection: ConnectionType) -> Self { - match connection { - ConnectionType::NotConnected => 0, - ConnectionType::Connected => 1, - ConnectionType::CanConnect => 2, - ConnectionType::CannotConnect => 3, - } - } + fn from(connection: ConnectionType) -> Self { + match connection { + ConnectionType::NotConnected => 0, + ConnectionType::Connected => 1, + ConnectionType::CanConnect => 2, + ConnectionType::CannotConnect => 3, + } + } } /// Kademlia peer. #[derive(Debug, Clone)] pub struct KademliaPeer { - /// Peer key. - pub(super) key: Key, + /// Peer key. + pub(super) key: Key, - /// Peer ID. - pub(super) peer: PeerId, + /// Peer ID. + pub(super) peer: PeerId, - /// Known addresses of peer. - pub(super) address_store: AddressStore, + /// Known addresses of peer. + pub(super) address_store: AddressStore, - /// Connection type. - pub(super) connection: ConnectionType, + /// Connection type. + pub(super) connection: ConnectionType, } impl KademliaPeer { - /// Create new [`KademliaPeer`]. - pub fn new(peer: PeerId, addresses: Vec, connection: ConnectionType) -> Self { - let mut address_store = AddressStore::new(); - - for address in addresses.into_iter() { - address_store.insert(AddressRecord::from_raw_multiaddr(address)); - } - - Self { - peer, - address_store, - connection, - key: Key::from(peer), - } - } - - /// Add the following addresses to the kademlia peer if there's enough space. - pub fn push_addresses(&mut self, addresses: impl IntoIterator) { - for address in addresses { - self.address_store.insert(AddressRecord::from_raw_multiaddr(address)); - } - } - - /// Returns the addresses of the peer. - pub fn addresses(&self) -> Vec { - self.address_store.addresses(MAX_ADDRESSES) - } + /// Create new [`KademliaPeer`]. + pub fn new(peer: PeerId, addresses: Vec, connection: ConnectionType) -> Self { + let mut address_store = AddressStore::new(); + + for address in addresses.into_iter() { + address_store.insert(AddressRecord::from_raw_multiaddr(address)); + } + + Self { peer, address_store, connection, key: Key::from(peer) } + } + + /// Add the following addresses to the kademlia peer if there's enough space. + pub fn push_addresses(&mut self, addresses: impl IntoIterator) { + for address in addresses { + self.address_store.insert(AddressRecord::from_raw_multiaddr(address)); + } + } + + /// Returns the addresses of the peer. + pub fn addresses(&self) -> Vec { + self.address_store.addresses(MAX_ADDRESSES) + } } impl TryFrom<&schema::kademlia::Peer> for KademliaPeer { - type Error = (); - - fn try_from(record: &schema::kademlia::Peer) -> Result { - let peer = PeerId::from_bytes(&record.id).map_err(|_| ())?; - - let mut address_store = AddressStore::new(); - for address in record.addrs.iter() { - let Ok(address) = Multiaddr::try_from(address.clone()) else { - continue; - }; - address_store.insert(AddressRecord::from_raw_multiaddr(address)); - } - - Ok(KademliaPeer { - key: Key::from(peer), - peer, - address_store, - connection: ConnectionType::try_from(record.connection)?, - }) - } + type Error = (); + + fn try_from(record: &schema::kademlia::Peer) -> Result { + let peer = PeerId::from_bytes(&record.id).map_err(|_| ())?; + + let mut address_store = AddressStore::new(); + for address in record.addrs.iter() { + let Ok(address) = Multiaddr::try_from(address.clone()) else { + continue; + }; + address_store.insert(AddressRecord::from_raw_multiaddr(address)); + } + + Ok(KademliaPeer { + key: Key::from(peer), + peer, + address_store, + connection: ConnectionType::try_from(record.connection)?, + }) + } } impl From<&KademliaPeer> for schema::kademlia::Peer { - fn from(peer: &KademliaPeer) -> Self { - schema::kademlia::Peer { - id: peer.peer.to_bytes(), - addrs: peer - .address_store - .addresses(MAX_ADDRESSES) - .iter() - .map(|address| address.to_vec()) - .collect(), - connection: peer.connection.into(), - } - } + fn from(peer: &KademliaPeer) -> Self { + schema::kademlia::Peer { + id: peer.peer.to_bytes(), + addrs: peer + .address_store + .addresses(MAX_ADDRESSES) + .iter() + .map(|address| address.to_vec()) + .collect(), + connection: peer.connection.into(), + } + } } diff --git a/client/litep2p/src/protocol/libp2p/ping/config.rs b/client/litep2p/src/protocol/libp2p/ping/config.rs index 1240513a..4c1a3266 100644 --- a/client/litep2p/src/protocol/libp2p/ping/config.rs +++ b/client/litep2p/src/protocol/libp2p/ping/config.rs @@ -19,8 +19,8 @@ // DEALINGS IN THE SOFTWARE. use crate::{ - codec::ProtocolCodec, protocol::libp2p::ping::PingEvent, types::protocol::ProtocolName, - DEFAULT_CHANNEL_SIZE, + codec::ProtocolCodec, protocol::libp2p::ping::PingEvent, types::protocol::ProtocolName, + DEFAULT_CHANNEL_SIZE, }; use std::time::Duration; @@ -44,101 +44,101 @@ pub const PING_INTERVAL: Duration = Duration::from_secs(5); /// Ping configuration. pub struct Config { - /// Protocol name. - pub(crate) protocol: ProtocolName, + /// Protocol name. + pub(crate) protocol: ProtocolName, - /// Codec used by the protocol. - pub(crate) codec: ProtocolCodec, + /// Codec used by the protocol. + pub(crate) codec: ProtocolCodec, - /// Maximum failures before the peer is considered unreachable. - pub(crate) max_failures: usize, + /// Maximum failures before the peer is considered unreachable. + pub(crate) max_failures: usize, - /// TX channel for sending events to the user protocol. - pub(crate) tx_event: Sender, + /// TX channel for sending events to the user protocol. + pub(crate) tx_event: Sender, - pub(crate) ping_interval: Duration, + pub(crate) ping_interval: Duration, } impl Config { - /// Create new [`Config`] with default values. - /// - /// Returns a config that is given to `Litep2pConfig` and an event stream for [`PingEvent`]s. - pub fn default() -> (Self, Box + Send + Unpin>) { - let (tx_event, rx_event) = channel(DEFAULT_CHANNEL_SIZE); - - ( - Self { - tx_event, - ping_interval: PING_INTERVAL, - max_failures: MAX_FAILURES, - protocol: ProtocolName::from(PROTOCOL_NAME), - codec: ProtocolCodec::Identity(PING_PAYLOAD_SIZE), - }, - Box::new(ReceiverStream::new(rx_event)), - ) - } + /// Create new [`Config`] with default values. + /// + /// Returns a config that is given to `Litep2pConfig` and an event stream for [`PingEvent`]s. + pub fn default() -> (Self, Box + Send + Unpin>) { + let (tx_event, rx_event) = channel(DEFAULT_CHANNEL_SIZE); + + ( + Self { + tx_event, + ping_interval: PING_INTERVAL, + max_failures: MAX_FAILURES, + protocol: ProtocolName::from(PROTOCOL_NAME), + codec: ProtocolCodec::Identity(PING_PAYLOAD_SIZE), + }, + Box::new(ReceiverStream::new(rx_event)), + ) + } } /// Ping configuration builder. pub struct ConfigBuilder { - /// Protocol name. - protocol: ProtocolName, + /// Protocol name. + protocol: ProtocolName, - /// Codec used by the protocol. - codec: ProtocolCodec, + /// Codec used by the protocol. + codec: ProtocolCodec, - /// Maximum failures before the peer is considered unreachable. - max_failures: usize, + /// Maximum failures before the peer is considered unreachable. + max_failures: usize, - /// Interval between outbound pings. - ping_interval: Duration, + /// Interval between outbound pings. + ping_interval: Duration, } impl Default for ConfigBuilder { - fn default() -> Self { - Self::new() - } + fn default() -> Self { + Self::new() + } } impl ConfigBuilder { - /// Create new default [`Config`] which can be modified by the user. - pub fn new() -> Self { - Self { - ping_interval: PING_INTERVAL, - max_failures: MAX_FAILURES, - protocol: ProtocolName::from(PROTOCOL_NAME), - codec: ProtocolCodec::Identity(PING_PAYLOAD_SIZE), - } - } - - /// Set maximum failures the protocol. - pub fn with_max_failure(mut self, max_failures: usize) -> Self { - self.max_failures = max_failures; - self - } - - /// Set ping interval. - /// - /// The default is 5 seconds and should be kept like this for compatibility - /// with litep2p <= v0.13.0. - pub fn with_ping_interval(mut self, ping_interval: Duration) -> Self { - self.ping_interval = ping_interval; - self - } - - /// Build [`Config`]. - pub fn build(self) -> (Config, Box + Send + Unpin>) { - let (tx_event, rx_event) = channel(DEFAULT_CHANNEL_SIZE); - - ( - Config { - tx_event, - ping_interval: self.ping_interval, - max_failures: self.max_failures, - protocol: self.protocol, - codec: self.codec, - }, - Box::new(ReceiverStream::new(rx_event)), - ) - } + /// Create new default [`Config`] which can be modified by the user. + pub fn new() -> Self { + Self { + ping_interval: PING_INTERVAL, + max_failures: MAX_FAILURES, + protocol: ProtocolName::from(PROTOCOL_NAME), + codec: ProtocolCodec::Identity(PING_PAYLOAD_SIZE), + } + } + + /// Set maximum failures the protocol. + pub fn with_max_failure(mut self, max_failures: usize) -> Self { + self.max_failures = max_failures; + self + } + + /// Set ping interval. + /// + /// The default is 5 seconds and should be kept like this for compatibility + /// with litep2p <= v0.13.0. + pub fn with_ping_interval(mut self, ping_interval: Duration) -> Self { + self.ping_interval = ping_interval; + self + } + + /// Build [`Config`]. + pub fn build(self) -> (Config, Box + Send + Unpin>) { + let (tx_event, rx_event) = channel(DEFAULT_CHANNEL_SIZE); + + ( + Config { + tx_event, + ping_interval: self.ping_interval, + max_failures: self.max_failures, + protocol: self.protocol, + codec: self.codec, + }, + Box::new(ReceiverStream::new(rx_event)), + ) + } } diff --git a/client/litep2p/src/protocol/libp2p/ping/mod.rs b/client/litep2p/src/protocol/libp2p/ping/mod.rs index db19ec6c..650eb0fb 100644 --- a/client/litep2p/src/protocol/libp2p/ping/mod.rs +++ b/client/litep2p/src/protocol/libp2p/ping/mod.rs @@ -21,22 +21,22 @@ //! [`/ipfs/ping/1.0.0`](https://github.com/libp2p/specs/blob/master/ping/ping.md) implementation. use crate::{ - error::SubstreamError, - protocol::{Direction, TransportEvent, TransportService}, - substream::Substream, - types::SubstreamId, - PeerId, + error::SubstreamError, + protocol::{Direction, TransportEvent, TransportService}, + substream::Substream, + types::SubstreamId, + PeerId, }; use bytes::Bytes; use futures::{ - stream::{self, BoxStream}, - FutureExt, StreamExt, + stream::{self, BoxStream}, + FutureExt, StreamExt, }; use rand::Rng as _; use std::{ - collections::HashSet, - time::{Duration, Instant}, + collections::HashSet, + time::{Duration, Instant}, }; use tokio::sync::mpsc; use tokio_stream::StreamMap; @@ -52,238 +52,238 @@ const LOG_TARGET: &str = "litep2p::ipfs::ping"; /// Events emitted by the ping protocol. #[derive(Debug)] pub enum PingEvent { - /// Ping time with remote peer. - Ping { - /// Peer ID. - peer: PeerId, - - /// Measured ping time with the peer. - ping: Duration, - }, + /// Ping time with remote peer. + Ping { + /// Peer ID. + peer: PeerId, + + /// Measured ping time with the peer. + ping: Duration, + }, } /// Ping protocol. pub(crate) struct Ping { - /// Maximum failures before the peer is considered unreachable. - /// This must be at least 1 until is adopted - /// by the network. (With older litep2p every other ping fails.) - // TODO: use this to disconnect peers. - _max_failures: usize, + /// Maximum failures before the peer is considered unreachable. + /// This must be at least 1 until is adopted + /// by the network. (With older litep2p every other ping fails.) + // TODO: use this to disconnect peers. + _max_failures: usize, - /// Connection service. - service: TransportService, + /// Connection service. + service: TransportService, - /// TX channel for sending events to the user protocol. - tx: mpsc::Sender, + /// TX channel for sending events to the user protocol. + tx: mpsc::Sender, - /// Local pingers per peer. - pingers: StreamMap>>, + /// Local pingers per peer. + pingers: StreamMap>>, - /// Substreams on which we retry pings after failure. Used for rate-limiting. - retries: HashSet, + /// Substreams on which we retry pings after failure. Used for rate-limiting. + retries: HashSet, - /// Ping responders per peer. - responders: StreamMap>>, + /// Ping responders per peer. + responders: StreamMap>>, - /// Interval between outbound pings. - ping_interval: Duration, + /// Interval between outbound pings. + ping_interval: Duration, } impl Ping { - /// Create new [`Ping`] protocol. - pub fn new(service: TransportService, config: Config) -> Self { - Self { - service, - tx: config.tx_event, - ping_interval: config.ping_interval, - pingers: StreamMap::new(), - retries: HashSet::new(), - responders: StreamMap::new(), - _max_failures: config.max_failures, - } - } - - /// Connection established to remote peer. - fn on_connection_established(&mut self, peer: PeerId) { - tracing::debug!(target: LOG_TARGET, ?peer, "connection established"); - - if let Err(error) = self.service.open_substream(peer) { - tracing::debug!(target: LOG_TARGET, ?peer, ?error, "failed to open substream"); - } - } - - /// Connection closed to remote peer. - fn on_connection_closed(&mut self, peer: PeerId) { - tracing::debug!(target: LOG_TARGET, ?peer, "connection closed"); - } - - /// Handle outbound substream. - fn on_outbound_substream( - &mut self, - peer: PeerId, - substream_id: SubstreamId, - substream: Substream, - ) { - tracing::trace!(target: LOG_TARGET, ?peer, "handle outbound substream"); - let interval = self.ping_interval; - let should_wait = self.retries.remove(&substream_id); - - let pinger_stream = stream::unfold( - (substream, should_wait), - move |(mut substream, should_wait)| async move { - if should_wait { - tokio::time::sleep(interval).await; - } - - let payload = Bytes::from(Vec::from(rand::thread_rng().gen::<[u8; 32]>())); - - let ping = async { - let now = Instant::now(); - - substream.send_framed(payload.clone()).await?; - let received = substream.next().await.ok_or(PingError::SubstreamError( - SubstreamError::ReadFailure(Some(substream_id)), - ))??; - - if received == payload { - Ok(now.elapsed()) - } else { - Err(PingError::InvalidPayload) - } - }; - - match tokio::time::timeout(Duration::from_secs(20), ping).await { - Ok(Ok(elapsed)) => Some((Ok(elapsed), (substream, true))), - Ok(Err(error)) => Some((Err(error), (substream, false))), - Err(timeout) => Some((Err(timeout.into()), (substream, false))), - } - }, - ); - - // We could overwrite the old pinger here if connection was closed then opened before the - // ping failed. - let _ = self.pingers.insert(peer, pinger_stream.boxed()); - } - - /// Handle inbound substream. - fn on_inbound_substream(&mut self, peer: PeerId, mut substream: Substream) { - tracing::trace!(target: LOG_TARGET, ?peer, "handle inbound substream"); - - let responder_future = async move { - loop { - if let Some(payload) = substream.next().await { - substream.send_framed(payload?.freeze()).await?; - } else { - return Ok(()); - } - } - }; - - if self.responders.insert(peer, responder_future.into_stream().boxed()).is_some() { - tracing::trace!( - target: LOG_TARGET, - ?peer, - "discarding ping substream as remote opened a new one", - ); - } - } - - /// Start [`Ping`] event loop. - pub async fn run(mut self) { - tracing::debug!(target: LOG_TARGET, "starting ping event loop"); - - loop { - tokio::select! { - event = self.service.next() => match event { - Some(TransportEvent::ConnectionEstablished { peer, .. }) => { - self.on_connection_established(peer); - } - Some(TransportEvent::ConnectionClosed { peer }) => { - self.on_connection_closed(peer); - } - Some(TransportEvent::SubstreamOpened { - peer, - substream, - direction, - .. - }) => match direction { - Direction::Inbound => { - self.on_inbound_substream(peer, substream); - } - Direction::Outbound(substream_id) => { - self.on_outbound_substream(peer, substream_id, substream); - } - } - Some(TransportEvent::SubstreamOpenFailure { - substream, - .. - }) => { - self.retries.remove(&substream); - } - Some(_) => {} - None => return, - }, - Some((peer, result)) = self.responders.next(), if !self.responders.is_empty() => { - // Remove the future from `StreamMap` to not wait untill it is polled again and - // removes it itself getting `None`. Otherwise we can get a confusing log - // message when try to insert a new responder for the same peer. - self.responders.remove(&peer); - - tracing::trace!( - target: LOG_TARGET, - ?peer, - ?result, - "inbound ping responder terminated", - ); - } - Some((peer, result)) = self.pingers.next(), if !self.pingers.is_empty() => { - match result { - Ok(elapsed) => { - tracing::debug!( - target: LOG_TARGET, - ?peer, - time_us = elapsed.as_micros(), - "pong", - ); - - let _ = self.tx.send(PingEvent::Ping { peer, ping: elapsed }).await; - } - Err(error) => { - self.pingers.remove(&peer); - - tracing::debug!( - target: LOG_TARGET, - ?peer, - ?error, - "ping failed", - ); - - match self.service.open_substream(peer) { - Ok(substream_id) => { - self.retries.insert(substream_id); - } - Err(error) => tracing::debug!( - target: LOG_TARGET, - ?peer, - ?error, - "failed to open substream after ping failed", - ), - } - } - } - } - } - } - } + /// Create new [`Ping`] protocol. + pub fn new(service: TransportService, config: Config) -> Self { + Self { + service, + tx: config.tx_event, + ping_interval: config.ping_interval, + pingers: StreamMap::new(), + retries: HashSet::new(), + responders: StreamMap::new(), + _max_failures: config.max_failures, + } + } + + /// Connection established to remote peer. + fn on_connection_established(&mut self, peer: PeerId) { + tracing::debug!(target: LOG_TARGET, ?peer, "connection established"); + + if let Err(error) = self.service.open_substream(peer) { + tracing::debug!(target: LOG_TARGET, ?peer, ?error, "failed to open substream"); + } + } + + /// Connection closed to remote peer. + fn on_connection_closed(&mut self, peer: PeerId) { + tracing::debug!(target: LOG_TARGET, ?peer, "connection closed"); + } + + /// Handle outbound substream. + fn on_outbound_substream( + &mut self, + peer: PeerId, + substream_id: SubstreamId, + substream: Substream, + ) { + tracing::trace!(target: LOG_TARGET, ?peer, "handle outbound substream"); + let interval = self.ping_interval; + let should_wait = self.retries.remove(&substream_id); + + let pinger_stream = stream::unfold( + (substream, should_wait), + move |(mut substream, should_wait)| async move { + if should_wait { + tokio::time::sleep(interval).await; + } + + let payload = Bytes::from(Vec::from(rand::thread_rng().gen::<[u8; 32]>())); + + let ping = async { + let now = Instant::now(); + + substream.send_framed(payload.clone()).await?; + let received = substream.next().await.ok_or(PingError::SubstreamError( + SubstreamError::ReadFailure(Some(substream_id)), + ))??; + + if received == payload { + Ok(now.elapsed()) + } else { + Err(PingError::InvalidPayload) + } + }; + + match tokio::time::timeout(Duration::from_secs(20), ping).await { + Ok(Ok(elapsed)) => Some((Ok(elapsed), (substream, true))), + Ok(Err(error)) => Some((Err(error), (substream, false))), + Err(timeout) => Some((Err(timeout.into()), (substream, false))), + } + }, + ); + + // We could overwrite the old pinger here if connection was closed then opened before the + // ping failed. + let _ = self.pingers.insert(peer, pinger_stream.boxed()); + } + + /// Handle inbound substream. + fn on_inbound_substream(&mut self, peer: PeerId, mut substream: Substream) { + tracing::trace!(target: LOG_TARGET, ?peer, "handle inbound substream"); + + let responder_future = async move { + loop { + if let Some(payload) = substream.next().await { + substream.send_framed(payload?.freeze()).await?; + } else { + return Ok(()); + } + } + }; + + if self.responders.insert(peer, responder_future.into_stream().boxed()).is_some() { + tracing::trace!( + target: LOG_TARGET, + ?peer, + "discarding ping substream as remote opened a new one", + ); + } + } + + /// Start [`Ping`] event loop. + pub async fn run(mut self) { + tracing::debug!(target: LOG_TARGET, "starting ping event loop"); + + loop { + tokio::select! { + event = self.service.next() => match event { + Some(TransportEvent::ConnectionEstablished { peer, .. }) => { + self.on_connection_established(peer); + } + Some(TransportEvent::ConnectionClosed { peer }) => { + self.on_connection_closed(peer); + } + Some(TransportEvent::SubstreamOpened { + peer, + substream, + direction, + .. + }) => match direction { + Direction::Inbound => { + self.on_inbound_substream(peer, substream); + } + Direction::Outbound(substream_id) => { + self.on_outbound_substream(peer, substream_id, substream); + } + } + Some(TransportEvent::SubstreamOpenFailure { + substream, + .. + }) => { + self.retries.remove(&substream); + } + Some(_) => {} + None => return, + }, + Some((peer, result)) = self.responders.next(), if !self.responders.is_empty() => { + // Remove the future from `StreamMap` to not wait untill it is polled again and + // removes it itself getting `None`. Otherwise we can get a confusing log + // message when try to insert a new responder for the same peer. + self.responders.remove(&peer); + + tracing::trace!( + target: LOG_TARGET, + ?peer, + ?result, + "inbound ping responder terminated", + ); + } + Some((peer, result)) = self.pingers.next(), if !self.pingers.is_empty() => { + match result { + Ok(elapsed) => { + tracing::debug!( + target: LOG_TARGET, + ?peer, + time_us = elapsed.as_micros(), + "pong", + ); + + let _ = self.tx.send(PingEvent::Ping { peer, ping: elapsed }).await; + } + Err(error) => { + self.pingers.remove(&peer); + + tracing::debug!( + target: LOG_TARGET, + ?peer, + ?error, + "ping failed", + ); + + match self.service.open_substream(peer) { + Ok(substream_id) => { + self.retries.insert(substream_id); + } + Err(error) => tracing::debug!( + target: LOG_TARGET, + ?peer, + ?error, + "failed to open substream after ping failed", + ), + } + } + } + } + } + } + } } /// Possible error of the outbound ping. #[derive(Debug, thiserror::Error)] enum PingError { - #[error("Substream error: {0}")] - SubstreamError(#[from] SubstreamError), - #[error("Invalid payload received")] - InvalidPayload, - #[error("Timeout")] - Timeout(#[from] tokio::time::error::Elapsed), + #[error("Substream error: {0}")] + SubstreamError(#[from] SubstreamError), + #[error("Invalid payload received")] + InvalidPayload, + #[error("Timeout")] + Timeout(#[from] tokio::time::error::Elapsed), } diff --git a/client/litep2p/src/protocol/mdns.rs b/client/litep2p/src/protocol/mdns.rs index f80e9356..341ddb3d 100644 --- a/client/litep2p/src/protocol/mdns.rs +++ b/client/litep2p/src/protocol/mdns.rs @@ -27,22 +27,22 @@ use futures::Stream; use multiaddr::Multiaddr; use rand::{distributions::Alphanumeric, Rng}; use simple_dns::{ - rdata::{RData, PTR, TXT}, - Name, Packet, PacketFlag, Question, ResourceRecord, CLASS, QCLASS, QTYPE, TYPE, + rdata::{RData, PTR, TXT}, + Name, Packet, PacketFlag, Question, ResourceRecord, CLASS, QCLASS, QTYPE, TYPE, }; use socket2::{Domain, Protocol, Socket, Type}; use tokio::{ - net::UdpSocket, - sync::mpsc::{channel, Sender}, + net::UdpSocket, + sync::mpsc::{channel, Sender}, }; use tokio_stream::wrappers::ReceiverStream; use std::{ - collections::HashSet, - net, - net::{IpAddr, Ipv4Addr, SocketAddr}, - sync::Arc, - time::Duration, + collections::HashSet, + net, + net::{IpAddr, Ipv4Addr, SocketAddr}, + sync::Arc, + time::Duration, }; /// Logging target for the file. @@ -60,404 +60,401 @@ const SERVICE_NAME: &str = "_p2p._udp.local"; /// Events emitted by mDNS. // #[derive(Debug, Clone)] pub enum MdnsEvent { - /// One or more addresses discovered. - Discovered(Vec), + /// One or more addresses discovered. + Discovered(Vec), } /// mDNS configuration. // #[derive(Debug)] pub struct Config { - /// How often the network should be queried for new peers. - query_interval: Duration, + /// How often the network should be queried for new peers. + query_interval: Duration, - /// TX channel for sending mDNS events to user. - tx: Sender, + /// TX channel for sending mDNS events to user. + tx: Sender, } impl Config { - /// Create new [`Config`]. - /// - /// Return the configuration and an event stream for receiving [`MdnsEvent`]s. - pub fn new( - query_interval: Duration, - ) -> (Self, Box + Send + Unpin>) { - let (tx, rx) = channel(DEFAULT_CHANNEL_SIZE); - ( - Self { query_interval, tx }, - Box::new(ReceiverStream::new(rx)), - ) - } + /// Create new [`Config`]. + /// + /// Return the configuration and an event stream for receiving [`MdnsEvent`]s. + pub fn new( + query_interval: Duration, + ) -> (Self, Box + Send + Unpin>) { + let (tx, rx) = channel(DEFAULT_CHANNEL_SIZE); + (Self { query_interval, tx }, Box::new(ReceiverStream::new(rx))) + } } /// Main mDNS object. pub(crate) struct Mdns { - /// Query interval. - query_interval: tokio::time::Interval, + /// Query interval. + query_interval: tokio::time::Interval, - /// TX channel for sending events to user. - event_tx: Sender, + /// TX channel for sending events to user. + event_tx: Sender, - /// Handle to `TransportManager`. - _transport_handle: TransportManagerHandle, + /// Handle to `TransportManager`. + _transport_handle: TransportManagerHandle, - // Username. - username: String, + // Username. + username: String, - /// Next query ID. - next_query_id: u16, + /// Next query ID. + next_query_id: u16, - /// Buffer for incoming messages. - receive_buffer: Vec, + /// Buffer for incoming messages. + receive_buffer: Vec, - /// Listen addresses. - listen_addresses: Vec>, + /// Listen addresses. + listen_addresses: Vec>, - /// Discovered addresses. - discovered: HashSet, + /// Discovered addresses. + discovered: HashSet, } impl Mdns { - /// Create new [`Mdns`]. - pub(crate) fn new( - _transport_handle: TransportManagerHandle, - config: Config, - listen_addresses: Vec, - ) -> Self { - let mut query_interval = tokio::time::interval(config.query_interval); - query_interval.set_missed_tick_behavior(tokio::time::MissedTickBehavior::Delay); - - Self { - _transport_handle, - event_tx: config.tx, - next_query_id: 1337u16, - discovered: HashSet::new(), - query_interval, - receive_buffer: vec![0u8; 4096], - username: rand::thread_rng() - .sample_iter(&Alphanumeric) - .take(32) - .map(char::from) - .collect(), - listen_addresses: listen_addresses - .into_iter() - .map(|address| format!("dnsaddr={address}").into()) - .collect(), - } - } - - /// Get next query ID. - fn next_query_id(&mut self) -> u16 { - let query_id = self.next_query_id; - self.next_query_id += 1; - - query_id - } - - /// Send mDNS query on the network. - async fn on_outbound_request(&mut self, socket: &UdpSocket) -> crate::Result<()> { - tracing::debug!(target: LOG_TARGET, "send outbound query"); - - let mut packet = Packet::new_query(self.next_query_id()); - - packet.questions.push(Question { - qname: Name::new_unchecked(SERVICE_NAME), - qtype: QTYPE::TYPE(TYPE::PTR), - qclass: QCLASS::CLASS(CLASS::IN), - unicast_response: false, - }); - - socket - .send_to( - &packet.build_bytes_vec().expect("valid packet"), - (IPV4_MULTICAST_ADDRESS, IPV4_MULTICAST_PORT), - ) - .await - .map(|_| ()) - .map_err(From::from) - } - - /// Handle inbound query. - fn on_inbound_request(&self, packet: Packet) -> Option> { - tracing::debug!(target: LOG_TARGET, ?packet, "handle inbound request"); - - let mut packet = Packet::new_reply(packet.id()); - let srv_name = Name::new_unchecked(SERVICE_NAME); - - packet.answers.push(ResourceRecord::new( - srv_name.clone(), - CLASS::IN, - 360, - RData::PTR(PTR(Name::new_unchecked(&self.username))), - )); - - for address in &self.listen_addresses { - let mut record = TXT::new(); - record.add_string(address).expect("valid string"); - - packet.additional_records.push(ResourceRecord { - name: Name::new_unchecked(&self.username), - class: CLASS::IN, - ttl: 360, - rdata: RData::TXT(record), - cache_flush: false, - }); - } - - Some(packet.build_bytes_vec().expect("valid packet")) - } - - /// Handle inbound response. - fn on_inbound_response(&self, packet: Packet) -> Vec { - tracing::debug!(target: LOG_TARGET, "handle inbound response"); - - let names = packet - .answers - .iter() - .filter_map(|answer| { - if answer.name != Name::new_unchecked(SERVICE_NAME) { - return None; - } - - match answer.rdata { - RData::PTR(PTR(ref name)) if name != &Name::new_unchecked(&self.username) => - Some(name), - _ => None, - } - }) - .collect::>(); - - let name = match names.len() { - 0 => return Vec::new(), - _ => { - tracing::debug!( - target: LOG_TARGET, - ?names, - "response name" - ); - - names[0] - } - }; - - packet - .additional_records - .iter() - .flat_map(|record| { - if &record.name != name { - return vec![]; - } - - // TODO: https://github.com/paritytech/litep2p/issues/333 - // `filter_map` is not necessary as there's at most one entry - match &record.rdata { - RData::TXT(text) => text - .attributes() - .iter() - .filter_map(|(_, address)| { - address.as_ref().and_then(|inner| inner.parse().ok()) - }) - .collect(), - _ => vec![], - } - }) - .collect() - } - - /// Setup the socket. - fn setup_socket() -> crate::Result { - let socket = Socket::new(Domain::IPV4, Type::DGRAM, Some(Protocol::UDP))?; - socket.set_reuse_address(true)?; - #[cfg(unix)] - socket.set_reuse_port(true)?; - socket.bind( - &SocketAddr::new(IpAddr::V4(Ipv4Addr::UNSPECIFIED), IPV4_MULTICAST_PORT).into(), - )?; - socket.set_multicast_loop_v4(true)?; - socket.set_multicast_ttl_v4(255)?; - socket.join_multicast_v4(&IPV4_MULTICAST_ADDRESS, &Ipv4Addr::UNSPECIFIED)?; - socket.set_nonblocking(true)?; - - UdpSocket::from_std(net::UdpSocket::from(socket)).map_err(Into::into) - } - - /// Event loop for [`Mdns`]. - pub(crate) async fn start(mut self) { - tracing::debug!(target: LOG_TARGET, "starting mdns event loop"); - - let mut socket_opt = None; - - loop { - let socket = match socket_opt.take() { - Some(s) => s, - None => { - let _ = self.query_interval.tick().await; - match Self::setup_socket() { - Ok(s) => s, - Err(error) => { - tracing::debug!( - target: LOG_TARGET, - ?error, - "failed to setup mDNS socket, will try again" - ); - continue; - } - } - } - }; - - tokio::select! { - _ = self.query_interval.tick() => { - tracing::trace!(target: LOG_TARGET, "query interval ticked"); - - if let Err(error) = self.on_outbound_request(&socket).await { - tracing::debug!(target: LOG_TARGET, ?error, "failed to send mdns query"); - // Let's recreate the socket - continue; - } - }, - - result = socket.recv_from(&mut self.receive_buffer) => match result { - Ok((nread, address)) => match Packet::parse(&self.receive_buffer[..nread]) { - Ok(packet) => match packet.has_flags(PacketFlag::RESPONSE) { - true => { - let to_forward = self.on_inbound_response(packet).into_iter().filter_map(|address| { - self.discovered.insert(address.clone()).then_some(address) - }) - .collect::>(); - - if !to_forward.is_empty() { - let _ = self.event_tx.send(MdnsEvent::Discovered(to_forward)).await; - } - } - false => if let Some(response) = self.on_inbound_request(packet) { - if let Err(error) = socket - .send_to(&response, (IPV4_MULTICAST_ADDRESS, IPV4_MULTICAST_PORT)) - .await { - tracing::debug!(target: LOG_TARGET, ?error, "failed to send mdns response"); - // Let's recreate the socket - continue; - } - } - } - Err(error) => tracing::debug!( - target: LOG_TARGET, - ?address, - ?error, - ?nread, - "failed to parse mdns packet" - ), - } - Err(error) => { - tracing::debug!(target: LOG_TARGET, ?error, "failed to read from socket"); - // Let's recreate the socket - continue; - } - }, - }; - - socket_opt = Some(socket); - } - } + /// Create new [`Mdns`]. + pub(crate) fn new( + _transport_handle: TransportManagerHandle, + config: Config, + listen_addresses: Vec, + ) -> Self { + let mut query_interval = tokio::time::interval(config.query_interval); + query_interval.set_missed_tick_behavior(tokio::time::MissedTickBehavior::Delay); + + Self { + _transport_handle, + event_tx: config.tx, + next_query_id: 1337u16, + discovered: HashSet::new(), + query_interval, + receive_buffer: vec![0u8; 4096], + username: rand::thread_rng() + .sample_iter(&Alphanumeric) + .take(32) + .map(char::from) + .collect(), + listen_addresses: listen_addresses + .into_iter() + .map(|address| format!("dnsaddr={address}").into()) + .collect(), + } + } + + /// Get next query ID. + fn next_query_id(&mut self) -> u16 { + let query_id = self.next_query_id; + self.next_query_id += 1; + + query_id + } + + /// Send mDNS query on the network. + async fn on_outbound_request(&mut self, socket: &UdpSocket) -> crate::Result<()> { + tracing::debug!(target: LOG_TARGET, "send outbound query"); + + let mut packet = Packet::new_query(self.next_query_id()); + + packet.questions.push(Question { + qname: Name::new_unchecked(SERVICE_NAME), + qtype: QTYPE::TYPE(TYPE::PTR), + qclass: QCLASS::CLASS(CLASS::IN), + unicast_response: false, + }); + + socket + .send_to( + &packet.build_bytes_vec().expect("valid packet"), + (IPV4_MULTICAST_ADDRESS, IPV4_MULTICAST_PORT), + ) + .await + .map(|_| ()) + .map_err(From::from) + } + + /// Handle inbound query. + fn on_inbound_request(&self, packet: Packet) -> Option> { + tracing::debug!(target: LOG_TARGET, ?packet, "handle inbound request"); + + let mut packet = Packet::new_reply(packet.id()); + let srv_name = Name::new_unchecked(SERVICE_NAME); + + packet.answers.push(ResourceRecord::new( + srv_name.clone(), + CLASS::IN, + 360, + RData::PTR(PTR(Name::new_unchecked(&self.username))), + )); + + for address in &self.listen_addresses { + let mut record = TXT::new(); + record.add_string(address).expect("valid string"); + + packet.additional_records.push(ResourceRecord { + name: Name::new_unchecked(&self.username), + class: CLASS::IN, + ttl: 360, + rdata: RData::TXT(record), + cache_flush: false, + }); + } + + Some(packet.build_bytes_vec().expect("valid packet")) + } + + /// Handle inbound response. + fn on_inbound_response(&self, packet: Packet) -> Vec { + tracing::debug!(target: LOG_TARGET, "handle inbound response"); + + let names = packet + .answers + .iter() + .filter_map(|answer| { + if answer.name != Name::new_unchecked(SERVICE_NAME) { + return None; + } + + match answer.rdata { + RData::PTR(PTR(ref name)) if name != &Name::new_unchecked(&self.username) => + Some(name), + _ => None, + } + }) + .collect::>(); + + let name = match names.len() { + 0 => return Vec::new(), + _ => { + tracing::debug!( + target: LOG_TARGET, + ?names, + "response name" + ); + + names[0] + }, + }; + + packet + .additional_records + .iter() + .flat_map(|record| { + if &record.name != name { + return vec![]; + } + + // TODO: https://github.com/paritytech/litep2p/issues/333 + // `filter_map` is not necessary as there's at most one entry + match &record.rdata { + RData::TXT(text) => text + .attributes() + .iter() + .filter_map(|(_, address)| { + address.as_ref().and_then(|inner| inner.parse().ok()) + }) + .collect(), + _ => vec![], + } + }) + .collect() + } + + /// Setup the socket. + fn setup_socket() -> crate::Result { + let socket = Socket::new(Domain::IPV4, Type::DGRAM, Some(Protocol::UDP))?; + socket.set_reuse_address(true)?; + #[cfg(unix)] + socket.set_reuse_port(true)?; + socket.bind( + &SocketAddr::new(IpAddr::V4(Ipv4Addr::UNSPECIFIED), IPV4_MULTICAST_PORT).into(), + )?; + socket.set_multicast_loop_v4(true)?; + socket.set_multicast_ttl_v4(255)?; + socket.join_multicast_v4(&IPV4_MULTICAST_ADDRESS, &Ipv4Addr::UNSPECIFIED)?; + socket.set_nonblocking(true)?; + + UdpSocket::from_std(net::UdpSocket::from(socket)).map_err(Into::into) + } + + /// Event loop for [`Mdns`]. + pub(crate) async fn start(mut self) { + tracing::debug!(target: LOG_TARGET, "starting mdns event loop"); + + let mut socket_opt = None; + + loop { + let socket = match socket_opt.take() { + Some(s) => s, + None => { + let _ = self.query_interval.tick().await; + match Self::setup_socket() { + Ok(s) => s, + Err(error) => { + tracing::debug!( + target: LOG_TARGET, + ?error, + "failed to setup mDNS socket, will try again" + ); + continue; + }, + } + }, + }; + + tokio::select! { + _ = self.query_interval.tick() => { + tracing::trace!(target: LOG_TARGET, "query interval ticked"); + + if let Err(error) = self.on_outbound_request(&socket).await { + tracing::debug!(target: LOG_TARGET, ?error, "failed to send mdns query"); + // Let's recreate the socket + continue; + } + }, + + result = socket.recv_from(&mut self.receive_buffer) => match result { + Ok((nread, address)) => match Packet::parse(&self.receive_buffer[..nread]) { + Ok(packet) => match packet.has_flags(PacketFlag::RESPONSE) { + true => { + let to_forward = self.on_inbound_response(packet).into_iter().filter_map(|address| { + self.discovered.insert(address.clone()).then_some(address) + }) + .collect::>(); + + if !to_forward.is_empty() { + let _ = self.event_tx.send(MdnsEvent::Discovered(to_forward)).await; + } + } + false => if let Some(response) = self.on_inbound_request(packet) { + if let Err(error) = socket + .send_to(&response, (IPV4_MULTICAST_ADDRESS, IPV4_MULTICAST_PORT)) + .await { + tracing::debug!(target: LOG_TARGET, ?error, "failed to send mdns response"); + // Let's recreate the socket + continue; + } + } + } + Err(error) => tracing::debug!( + target: LOG_TARGET, + ?address, + ?error, + ?nread, + "failed to parse mdns packet" + ), + } + Err(error) => { + tracing::debug!(target: LOG_TARGET, ?error, "failed to read from socket"); + // Let's recreate the socket + continue; + } + }, + }; + + socket_opt = Some(socket); + } + } } #[cfg(test)] mod tests { - use super::*; - use crate::transport::manager::TransportManagerBuilder; - use futures::StreamExt; - use multiaddr::Protocol; - - #[tokio::test] - async fn mdns_works() { - let _ = tracing_subscriber::fmt() - .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) - .try_init(); - - let (config1, mut stream1) = Config::new(Duration::from_secs(5)); - let manager1 = TransportManagerBuilder::new().build(); - - let mdns1 = Mdns::new( - manager1.transport_manager_handle(), - config1, - vec![ - "/ip6/::1/tcp/8888/p2p/12D3KooWNP463TyS3vUpmekjjZ2dg7xy1WHNMM7MqfsMevMTaaaa" - .parse() - .unwrap(), - "/ip4/127.0.0.1/tcp/8888/p2p/12D3KooWNP463TyS3vUpmekjjZ2dg7xy1WHNMM7MqfsMevMTaaaa" - .parse() - .unwrap(), - ], - ); - - let (config2, mut stream2) = Config::new(Duration::from_secs(5)); - let manager2 = TransportManagerBuilder::new().build(); - - let mdns2 = Mdns::new( - manager2.transport_manager_handle(), - config2, - vec![ - "/ip6/::1/tcp/9999/p2p/12D3KooWNP463TyS3vUpmekjjZ2dg7xy1WHNMM7MqfsMevMTbbbb" - .parse() - .unwrap(), - "/ip4/127.0.0.1/tcp/9999/p2p/12D3KooWNP463TyS3vUpmekjjZ2dg7xy1WHNMM7MqfsMevMTbbbb" - .parse() - .unwrap(), - ], - ); - - tokio::spawn(mdns1.start()); - tokio::spawn(mdns2.start()); - - let mut peer1_discovered = false; - let mut peer2_discovered = false; - - while !peer1_discovered && !peer2_discovered { - tokio::select! { - event = stream1.next() => match event.unwrap() { - MdnsEvent::Discovered(addrs) => { - if addrs.len() == 2 { - let mut iter = addrs[0].iter(); - - if !std::matches!(iter.next(), Some(Protocol::Ip4(_) | Protocol::Ip6(_))) { - continue - } - - match iter.next() { - Some(Protocol::Tcp(port)) => { - if port != 9999 { - continue - } - } - _ => continue, - } - - peer1_discovered = true; - } - } - }, - event = stream2.next() => match event.unwrap() { - MdnsEvent::Discovered(addrs) => { - if addrs.len() == 2 { - let mut iter = addrs[0].iter(); - - if !std::matches!(iter.next(), Some(Protocol::Ip4(_) | Protocol::Ip6(_))) { - continue - } - - match iter.next() { - Some(Protocol::Tcp(port)) => { - if port != 8888 { - continue - } - } - _ => continue, - } - - peer2_discovered = true; - } - } - } - } - } - } + use super::*; + use crate::transport::manager::TransportManagerBuilder; + use futures::StreamExt; + use multiaddr::Protocol; + + #[tokio::test] + async fn mdns_works() { + let _ = tracing_subscriber::fmt() + .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) + .try_init(); + + let (config1, mut stream1) = Config::new(Duration::from_secs(5)); + let manager1 = TransportManagerBuilder::new().build(); + + let mdns1 = Mdns::new( + manager1.transport_manager_handle(), + config1, + vec![ + "/ip6/::1/tcp/8888/p2p/12D3KooWNP463TyS3vUpmekjjZ2dg7xy1WHNMM7MqfsMevMTaaaa" + .parse() + .unwrap(), + "/ip4/127.0.0.1/tcp/8888/p2p/12D3KooWNP463TyS3vUpmekjjZ2dg7xy1WHNMM7MqfsMevMTaaaa" + .parse() + .unwrap(), + ], + ); + + let (config2, mut stream2) = Config::new(Duration::from_secs(5)); + let manager2 = TransportManagerBuilder::new().build(); + + let mdns2 = Mdns::new( + manager2.transport_manager_handle(), + config2, + vec![ + "/ip6/::1/tcp/9999/p2p/12D3KooWNP463TyS3vUpmekjjZ2dg7xy1WHNMM7MqfsMevMTbbbb" + .parse() + .unwrap(), + "/ip4/127.0.0.1/tcp/9999/p2p/12D3KooWNP463TyS3vUpmekjjZ2dg7xy1WHNMM7MqfsMevMTbbbb" + .parse() + .unwrap(), + ], + ); + + tokio::spawn(mdns1.start()); + tokio::spawn(mdns2.start()); + + let mut peer1_discovered = false; + let mut peer2_discovered = false; + + while !peer1_discovered && !peer2_discovered { + tokio::select! { + event = stream1.next() => match event.unwrap() { + MdnsEvent::Discovered(addrs) => { + if addrs.len() == 2 { + let mut iter = addrs[0].iter(); + + if !std::matches!(iter.next(), Some(Protocol::Ip4(_) | Protocol::Ip6(_))) { + continue + } + + match iter.next() { + Some(Protocol::Tcp(port)) => { + if port != 9999 { + continue + } + } + _ => continue, + } + + peer1_discovered = true; + } + } + }, + event = stream2.next() => match event.unwrap() { + MdnsEvent::Discovered(addrs) => { + if addrs.len() == 2 { + let mut iter = addrs[0].iter(); + + if !std::matches!(iter.next(), Some(Protocol::Ip4(_) | Protocol::Ip6(_))) { + continue + } + + match iter.next() { + Some(Protocol::Tcp(port)) => { + if port != 8888 { + continue + } + } + _ => continue, + } + + peer2_discovered = true; + } + } + } + } + } + } } diff --git a/client/litep2p/src/protocol/mod.rs b/client/litep2p/src/protocol/mod.rs index e2da261f..487b0f6e 100644 --- a/client/litep2p/src/protocol/mod.rs +++ b/client/litep2p/src/protocol/mod.rs @@ -21,12 +21,12 @@ //! Protocol-related defines. use crate::{ - codec::ProtocolCodec, - error::SubstreamError, - substream::Substream, - transport::Endpoint, - types::{protocol::ProtocolName, SubstreamId}, - PeerId, + codec::ProtocolCodec, + error::SubstreamError, + substream::Substream, + transport::Endpoint, + types::{protocol::ProtocolName, SubstreamId}, + PeerId, }; use multiaddr::Multiaddr; @@ -50,94 +50,94 @@ mod transport_service; /// Substream direction. #[derive(Debug, Copy, Clone, Hash, PartialEq, Eq)] pub enum Direction { - /// Substream was opened by the remote peer. - Inbound, + /// Substream was opened by the remote peer. + Inbound, - /// Substream was opened by the local peer. - Outbound(SubstreamId), + /// Substream was opened by the local peer. + Outbound(SubstreamId), } /// Events emitted by one of the installed transports to protocol(s). #[derive(Debug)] pub enum TransportEvent { - /// Connection established to `peer`. - ConnectionEstablished { - /// Peer ID. - peer: PeerId, - - /// Endpoint. - endpoint: Endpoint, - }, - - /// Connection closed to peer. - ConnectionClosed { - /// Peer ID. - peer: PeerId, - }, - - /// Failed to dial peer. - /// - /// This is reported to that protocol which initiated the connection. - DialFailure { - /// Peer ID. - peer: PeerId, - - /// Dialed addresseses. - addresses: Vec, - }, - - /// Substream opened for `peer`. - SubstreamOpened { - /// Peer ID. - peer: PeerId, - - /// Protocol name. - /// - /// One protocol handler may handle multiple sub-protocols (such as `/ipfs/identify/1.0.0` - /// and `/ipfs/identify/push/1.0.0`) or it may have aliases which should be handled by - /// the same protocol handler. When the substream is sent from transport to the protocol - /// handler, the protocol name that was used to negotiate the substream is also sent so - /// the protocol can handle the substream appropriately. - protocol: ProtocolName, - - /// Fallback protocol. - fallback: Option, - - /// Substream direction. - /// - /// Informs the protocol whether the substream is inbound (opened by the remote node) - /// or outbound (opened by the local node). This allows the protocol to distinguish - /// between the two types of substreams and execute correct code for the substream. - /// - /// Outbound substreams also contain the substream ID which allows the protocol to - /// distinguish between different outbound substreams. - direction: Direction, - - /// Substream. - substream: Substream, - }, - - /// Failed to open substream. - /// - /// Substream open failures are reported only for outbound substreams. - SubstreamOpenFailure { - /// Substream ID. - substream: SubstreamId, - - /// Error that occurred when the substream was being opened. - error: SubstreamError, - }, + /// Connection established to `peer`. + ConnectionEstablished { + /// Peer ID. + peer: PeerId, + + /// Endpoint. + endpoint: Endpoint, + }, + + /// Connection closed to peer. + ConnectionClosed { + /// Peer ID. + peer: PeerId, + }, + + /// Failed to dial peer. + /// + /// This is reported to that protocol which initiated the connection. + DialFailure { + /// Peer ID. + peer: PeerId, + + /// Dialed addresseses. + addresses: Vec, + }, + + /// Substream opened for `peer`. + SubstreamOpened { + /// Peer ID. + peer: PeerId, + + /// Protocol name. + /// + /// One protocol handler may handle multiple sub-protocols (such as `/ipfs/identify/1.0.0` + /// and `/ipfs/identify/push/1.0.0`) or it may have aliases which should be handled by + /// the same protocol handler. When the substream is sent from transport to the protocol + /// handler, the protocol name that was used to negotiate the substream is also sent so + /// the protocol can handle the substream appropriately. + protocol: ProtocolName, + + /// Fallback protocol. + fallback: Option, + + /// Substream direction. + /// + /// Informs the protocol whether the substream is inbound (opened by the remote node) + /// or outbound (opened by the local node). This allows the protocol to distinguish + /// between the two types of substreams and execute correct code for the substream. + /// + /// Outbound substreams also contain the substream ID which allows the protocol to + /// distinguish between different outbound substreams. + direction: Direction, + + /// Substream. + substream: Substream, + }, + + /// Failed to open substream. + /// + /// Substream open failures are reported only for outbound substreams. + SubstreamOpenFailure { + /// Substream ID. + substream: SubstreamId, + + /// Error that occurred when the substream was being opened. + error: SubstreamError, + }, } /// Trait defining the interface for a user protocol. #[async_trait::async_trait] pub trait UserProtocol: Send { - /// Get user protocol name. - fn protocol(&self) -> ProtocolName; + /// Get user protocol name. + fn protocol(&self) -> ProtocolName; - /// Get user protocol codec. - fn codec(&self) -> ProtocolCodec; + /// Get user protocol codec. + fn codec(&self) -> ProtocolCodec; - /// Start the the user protocol event loop. - async fn run(self: Box, service: TransportService) -> crate::Result<()>; + /// Start the the user protocol event loop. + async fn run(self: Box, service: TransportService) -> crate::Result<()>; } diff --git a/client/litep2p/src/protocol/notification/config.rs b/client/litep2p/src/protocol/notification/config.rs index b9dedc14..36109150 100644 --- a/client/litep2p/src/protocol/notification/config.rs +++ b/client/litep2p/src/protocol/notification/config.rs @@ -19,15 +19,15 @@ // DEALINGS IN THE SOFTWARE. use crate::{ - codec::ProtocolCodec, - protocol::notification::{ - handle::NotificationHandle, - types::{ - InnerNotificationEvent, NotificationCommand, ASYNC_CHANNEL_SIZE, SYNC_CHANNEL_SIZE, - }, - }, - types::protocol::ProtocolName, - PeerId, DEFAULT_CHANNEL_SIZE, + codec::ProtocolCodec, + protocol::notification::{ + handle::NotificationHandle, + types::{ + InnerNotificationEvent, NotificationCommand, ASYNC_CHANNEL_SIZE, SYNC_CHANNEL_SIZE, + }, + }, + types::protocol::ProtocolName, + PeerId, DEFAULT_CHANNEL_SIZE, }; use bytes::BytesMut; @@ -39,219 +39,219 @@ use std::sync::Arc; /// Notification configuration. #[derive(Debug)] pub struct Config { - /// Protocol name. - pub(crate) protocol_name: ProtocolName, + /// Protocol name. + pub(crate) protocol_name: ProtocolName, - /// Protocol codec. - pub(crate) codec: ProtocolCodec, + /// Protocol codec. + pub(crate) codec: ProtocolCodec, - /// Maximum notification size. - _max_notification_size: usize, + /// Maximum notification size. + _max_notification_size: usize, - /// Handshake bytes. - pub(crate) handshake: Arc>>, + /// Handshake bytes. + pub(crate) handshake: Arc>>, - /// Auto accept inbound substream. - pub(super) auto_accept: bool, + /// Auto accept inbound substream. + pub(super) auto_accept: bool, - /// Protocol aliases. - pub(crate) fallback_names: Vec, + /// Protocol aliases. + pub(crate) fallback_names: Vec, - /// TX channel passed to the protocol used for sending events. - pub(crate) event_tx: Sender, + /// TX channel passed to the protocol used for sending events. + pub(crate) event_tx: Sender, - /// TX channel for sending notifications from the connection handlers. - pub(crate) notif_tx: Sender<(PeerId, BytesMut)>, + /// TX channel for sending notifications from the connection handlers. + pub(crate) notif_tx: Sender<(PeerId, BytesMut)>, - /// RX channel passed to the protocol used for receiving commands. - pub(crate) command_rx: Receiver, + /// RX channel passed to the protocol used for receiving commands. + pub(crate) command_rx: Receiver, - /// Synchronous channel size. - pub(crate) sync_channel_size: usize, + /// Synchronous channel size. + pub(crate) sync_channel_size: usize, - /// Asynchronous channel size. - pub(crate) async_channel_size: usize, + /// Asynchronous channel size. + pub(crate) async_channel_size: usize, - /// Should `NotificationProtocol` dial the peer if there is no connection to them - /// when an outbound substream is requested. - pub(crate) should_dial: bool, + /// Should `NotificationProtocol` dial the peer if there is no connection to them + /// when an outbound substream is requested. + pub(crate) should_dial: bool, } impl Config { - /// Create new [`Config`]. - pub fn new( - protocol_name: ProtocolName, - max_notification_size: usize, - handshake: Vec, - fallback_names: Vec, - auto_accept: bool, - sync_channel_size: usize, - async_channel_size: usize, - should_dial: bool, - ) -> (Self, NotificationHandle) { - let (event_tx, event_rx) = channel(DEFAULT_CHANNEL_SIZE); - let (notif_tx, notif_rx) = channel(DEFAULT_CHANNEL_SIZE); - let (command_tx, command_rx) = channel(DEFAULT_CHANNEL_SIZE); - let handshake = Arc::new(RwLock::new(handshake)); - let handle = - NotificationHandle::new(event_rx, notif_rx, command_tx, Arc::clone(&handshake)); - - ( - Self { - protocol_name, - codec: ProtocolCodec::UnsignedVarint(Some(max_notification_size)), - _max_notification_size: max_notification_size, - auto_accept, - handshake, - fallback_names, - event_tx, - notif_tx, - command_rx, - should_dial, - sync_channel_size, - async_channel_size, - }, - handle, - ) - } - - /// Get protocol name. - pub(crate) fn protocol_name(&self) -> &ProtocolName { - &self.protocol_name - } - - /// Set handshake for the protocol. - /// - /// This function is used to work around an issue in Polkadot SDK and users - /// should not depend on its continued existence. - pub fn set_handshake(&mut self, handshake: Vec) { - let mut inner = self.handshake.write(); - *inner = handshake; - } + /// Create new [`Config`]. + pub fn new( + protocol_name: ProtocolName, + max_notification_size: usize, + handshake: Vec, + fallback_names: Vec, + auto_accept: bool, + sync_channel_size: usize, + async_channel_size: usize, + should_dial: bool, + ) -> (Self, NotificationHandle) { + let (event_tx, event_rx) = channel(DEFAULT_CHANNEL_SIZE); + let (notif_tx, notif_rx) = channel(DEFAULT_CHANNEL_SIZE); + let (command_tx, command_rx) = channel(DEFAULT_CHANNEL_SIZE); + let handshake = Arc::new(RwLock::new(handshake)); + let handle = + NotificationHandle::new(event_rx, notif_rx, command_tx, Arc::clone(&handshake)); + + ( + Self { + protocol_name, + codec: ProtocolCodec::UnsignedVarint(Some(max_notification_size)), + _max_notification_size: max_notification_size, + auto_accept, + handshake, + fallback_names, + event_tx, + notif_tx, + command_rx, + should_dial, + sync_channel_size, + async_channel_size, + }, + handle, + ) + } + + /// Get protocol name. + pub(crate) fn protocol_name(&self) -> &ProtocolName { + &self.protocol_name + } + + /// Set handshake for the protocol. + /// + /// This function is used to work around an issue in Polkadot SDK and users + /// should not depend on its continued existence. + pub fn set_handshake(&mut self, handshake: Vec) { + let mut inner = self.handshake.write(); + *inner = handshake; + } } /// Notification configuration builder. pub struct ConfigBuilder { - /// Protocol name. - protocol_name: ProtocolName, + /// Protocol name. + protocol_name: ProtocolName, - /// Maximum notification size. - max_notification_size: Option, + /// Maximum notification size. + max_notification_size: Option, - /// Handshake bytes. - handshake: Option>, + /// Handshake bytes. + handshake: Option>, - /// Should `NotificationProtocol` dial the peer if an outbound substream is requested but there - /// is no connection to the peer. - should_dial: bool, + /// Should `NotificationProtocol` dial the peer if an outbound substream is requested but there + /// is no connection to the peer. + should_dial: bool, - /// Fallback names. - fallback_names: Vec, + /// Fallback names. + fallback_names: Vec, - /// Auto accept inbound substream. - auto_accept_inbound_for_initiated: bool, + /// Auto accept inbound substream. + auto_accept_inbound_for_initiated: bool, - /// Synchronous channel size. - sync_channel_size: usize, + /// Synchronous channel size. + sync_channel_size: usize, - /// Asynchronous channel size. - async_channel_size: usize, + /// Asynchronous channel size. + async_channel_size: usize, } impl ConfigBuilder { - /// Create new [`ConfigBuilder`]. - pub fn new(protocol_name: ProtocolName) -> Self { - Self { - protocol_name, - max_notification_size: None, - handshake: None, - fallback_names: Vec::new(), - auto_accept_inbound_for_initiated: false, - sync_channel_size: SYNC_CHANNEL_SIZE, - async_channel_size: ASYNC_CHANNEL_SIZE, - should_dial: true, - } - } - - /// Set maximum notification size. - pub fn with_max_size(mut self, max_notification_size: usize) -> Self { - self.max_notification_size = Some(max_notification_size); - self - } - - /// Set handshake. - pub fn with_handshake(mut self, handshake: Vec) -> Self { - self.handshake = Some(handshake); - self - } - - /// Set fallback names. - pub fn with_fallback_names(mut self, fallback_names: Vec) -> Self { - self.fallback_names = fallback_names; - self - } - - /// Auto-accept inbound substreams for those connections which were initiated by the local - /// node. - /// - /// Connection in this context means a bidirectional substream pair between two peers over a - /// given protocol. - /// - /// By default, when a node starts a connection with a remote node and opens an outbound - /// substream to them, that substream is validated and if it's accepted, remote node sends - /// their handshake over that substream and opens another substream to local node. The - /// substream that was opened by the local node is used for sending data and the one opened - /// by the remote node is used for receiving data. - /// - /// By default, even if the local node was the one that opened the first substream, this inbound - /// substream coming from remote node must be validated as the handshake of the remote node - /// may reveal that it's not someone that the local node is willing to accept. - /// - /// To disable this behavior, auto accepting for the inbound substream can be enabled. If local - /// node is the one that opened the connection and it was accepted by the remote node, local - /// node is only notified via - /// [`NotificationStreamOpened`](super::types::NotificationEvent::NotificationStreamOpened). - pub fn with_auto_accept_inbound(mut self, auto_accept: bool) -> Self { - self.auto_accept_inbound_for_initiated = auto_accept; - self - } - - /// Configure size of the channel for sending synchronous notifications. - /// - /// Default value is `16`. - pub fn with_sync_channel_size(mut self, size: usize) -> Self { - self.sync_channel_size = size; - self - } - - /// Configure size of the channel for sending asynchronous notifications. - /// - /// Default value is `8`. - pub fn with_async_channel_size(mut self, size: usize) -> Self { - self.async_channel_size = size; - self - } - - /// Should `NotificationProtocol` attempt to dial the peer if an outbound substream is opened - /// but no connection to the peer exist. - /// - /// Dialing is enabled by default. - pub fn with_dialing_enabled(mut self, should_dial: bool) -> Self { - self.should_dial = should_dial; - self - } - - /// Build notification configuration. - pub fn build(mut self) -> (Config, NotificationHandle) { - Config::new( - self.protocol_name, - self.max_notification_size.take().expect("notification size to be specified"), - self.handshake.take().expect("handshake to be specified"), - self.fallback_names, - self.auto_accept_inbound_for_initiated, - self.sync_channel_size, - self.async_channel_size, - self.should_dial, - ) - } + /// Create new [`ConfigBuilder`]. + pub fn new(protocol_name: ProtocolName) -> Self { + Self { + protocol_name, + max_notification_size: None, + handshake: None, + fallback_names: Vec::new(), + auto_accept_inbound_for_initiated: false, + sync_channel_size: SYNC_CHANNEL_SIZE, + async_channel_size: ASYNC_CHANNEL_SIZE, + should_dial: true, + } + } + + /// Set maximum notification size. + pub fn with_max_size(mut self, max_notification_size: usize) -> Self { + self.max_notification_size = Some(max_notification_size); + self + } + + /// Set handshake. + pub fn with_handshake(mut self, handshake: Vec) -> Self { + self.handshake = Some(handshake); + self + } + + /// Set fallback names. + pub fn with_fallback_names(mut self, fallback_names: Vec) -> Self { + self.fallback_names = fallback_names; + self + } + + /// Auto-accept inbound substreams for those connections which were initiated by the local + /// node. + /// + /// Connection in this context means a bidirectional substream pair between two peers over a + /// given protocol. + /// + /// By default, when a node starts a connection with a remote node and opens an outbound + /// substream to them, that substream is validated and if it's accepted, remote node sends + /// their handshake over that substream and opens another substream to local node. The + /// substream that was opened by the local node is used for sending data and the one opened + /// by the remote node is used for receiving data. + /// + /// By default, even if the local node was the one that opened the first substream, this inbound + /// substream coming from remote node must be validated as the handshake of the remote node + /// may reveal that it's not someone that the local node is willing to accept. + /// + /// To disable this behavior, auto accepting for the inbound substream can be enabled. If local + /// node is the one that opened the connection and it was accepted by the remote node, local + /// node is only notified via + /// [`NotificationStreamOpened`](super::types::NotificationEvent::NotificationStreamOpened). + pub fn with_auto_accept_inbound(mut self, auto_accept: bool) -> Self { + self.auto_accept_inbound_for_initiated = auto_accept; + self + } + + /// Configure size of the channel for sending synchronous notifications. + /// + /// Default value is `16`. + pub fn with_sync_channel_size(mut self, size: usize) -> Self { + self.sync_channel_size = size; + self + } + + /// Configure size of the channel for sending asynchronous notifications. + /// + /// Default value is `8`. + pub fn with_async_channel_size(mut self, size: usize) -> Self { + self.async_channel_size = size; + self + } + + /// Should `NotificationProtocol` attempt to dial the peer if an outbound substream is opened + /// but no connection to the peer exist. + /// + /// Dialing is enabled by default. + pub fn with_dialing_enabled(mut self, should_dial: bool) -> Self { + self.should_dial = should_dial; + self + } + + /// Build notification configuration. + pub fn build(mut self) -> (Config, NotificationHandle) { + Config::new( + self.protocol_name, + self.max_notification_size.take().expect("notification size to be specified"), + self.handshake.take().expect("handshake to be specified"), + self.fallback_names, + self.auto_accept_inbound_for_initiated, + self.sync_channel_size, + self.async_channel_size, + self.should_dial, + ) + } } diff --git a/client/litep2p/src/protocol/notification/connection.rs b/client/litep2p/src/protocol/notification/connection.rs index 4c140d2b..5a60625f 100644 --- a/client/litep2p/src/protocol/notification/connection.rs +++ b/client/litep2p/src/protocol/notification/connection.rs @@ -19,20 +19,20 @@ // DEALINGS IN THE SOFTWARE. use crate::{ - protocol::notification::handle::NotificationEventHandle, substream::Substream, PeerId, + protocol::notification::handle::NotificationEventHandle, substream::Substream, PeerId, }; use bytes::BytesMut; use futures::{FutureExt, SinkExt, Stream, StreamExt}; use tokio::sync::{ - mpsc::{Receiver, Sender}, - oneshot, + mpsc::{Receiver, Sender}, + oneshot, }; use tokio_util::sync::PollSender; use std::{ - pin::Pin, - task::{Context, Poll}, + pin::Pin, + task::{Context, Poll}, }; /// Logging target for the file. @@ -40,232 +40,228 @@ const LOG_TARGET: &str = "litep2p::notification::connection"; /// Bidirectional substream pair representing a connection to a remote peer. pub(crate) struct Connection { - /// Remote peer ID. - peer: PeerId, + /// Remote peer ID. + peer: PeerId, - /// Inbound substreams for receiving notifications. - inbound: Substream, + /// Inbound substreams for receiving notifications. + inbound: Substream, - /// Outbound substream for sending notifications. - outbound: Substream, + /// Outbound substream for sending notifications. + outbound: Substream, - /// Handle for sending notification events to user. - event_handle: NotificationEventHandle, + /// Handle for sending notification events to user. + event_handle: NotificationEventHandle, - /// TX channel used to notify [`NotificationProtocol`](super::NotificationProtocol) - /// that the connection has been closed. - conn_closed_tx: Sender, + /// TX channel used to notify [`NotificationProtocol`](super::NotificationProtocol) + /// that the connection has been closed. + conn_closed_tx: Sender, - /// TX channel for sending notifications. - notif_tx: PollSender<(PeerId, BytesMut)>, + /// TX channel for sending notifications. + notif_tx: PollSender<(PeerId, BytesMut)>, - /// Receiver for asynchronously sent notifications. - async_rx: Receiver>, + /// Receiver for asynchronously sent notifications. + async_rx: Receiver>, - /// Receiver for synchronously sent notifications. - sync_rx: Receiver>, + /// Receiver for synchronously sent notifications. + sync_rx: Receiver>, - /// Oneshot receiver used by [`NotificationProtocol`](super::NotificationProtocol) - /// to signal that local node wishes the close the connection. - rx: oneshot::Receiver<()>, + /// Oneshot receiver used by [`NotificationProtocol`](super::NotificationProtocol) + /// to signal that local node wishes the close the connection. + rx: oneshot::Receiver<()>, - /// Next notification to send, if any. - next_notification: Option>, + /// Next notification to send, if any. + next_notification: Option>, } /// Notify [`NotificationProtocol`](super::NotificationProtocol) that the connection was closed. #[derive(Debug)] pub enum NotifyProtocol { - /// Notify the protocol handler. - Yes, + /// Notify the protocol handler. + Yes, - /// Do not notify protocol handler. - No, + /// Do not notify protocol handler. + No, } impl Connection { - /// Create new [`Connection`]. - pub(crate) fn new( - peer: PeerId, - inbound: Substream, - outbound: Substream, - event_handle: NotificationEventHandle, - conn_closed_tx: Sender, - notif_tx: Sender<(PeerId, BytesMut)>, - async_rx: Receiver>, - sync_rx: Receiver>, - ) -> (Self, oneshot::Sender<()>) { - let (tx, rx) = oneshot::channel(); - - ( - Self { - rx, - peer, - sync_rx, - async_rx, - inbound, - outbound, - event_handle, - conn_closed_tx, - next_notification: None, - notif_tx: PollSender::new(notif_tx), - }, - tx, - ) - } - - /// Connection closed, clean up state. - /// - /// If [`NotificationProtocol`](super::NotificationProtocol) was the one that initiated - /// shut down, it's not notified of connection getting closed. - async fn close_connection(self, notify_protocol: NotifyProtocol) { - tracing::trace!( - target: LOG_TARGET, - peer = ?self.peer, - ?notify_protocol, - "close notification protocol", - ); - - let _ = self.inbound.close().await; - let _ = self.outbound.close().await; - - if std::matches!(notify_protocol, NotifyProtocol::Yes) { - let _ = self.conn_closed_tx.send(self.peer).await; - } - - self.event_handle.report_notification_stream_closed(self.peer).await; - } - - pub async fn start(mut self) { - tracing::debug!( - target: LOG_TARGET, - peer = ?self.peer, - "start connection event loop", - ); - - loop { - match self.next().await { - None - | Some(ConnectionEvent::CloseConnection { - notify: NotifyProtocol::Yes, - }) => return self.close_connection(NotifyProtocol::Yes).await, - Some(ConnectionEvent::CloseConnection { - notify: NotifyProtocol::No, - }) => return self.close_connection(NotifyProtocol::No).await, - Some(ConnectionEvent::NotificationReceived { notification }) => { - if let Err(_) = self.notif_tx.send_item((self.peer, notification)) { - return self.close_connection(NotifyProtocol::Yes).await; - } - } - } - } - } + /// Create new [`Connection`]. + pub(crate) fn new( + peer: PeerId, + inbound: Substream, + outbound: Substream, + event_handle: NotificationEventHandle, + conn_closed_tx: Sender, + notif_tx: Sender<(PeerId, BytesMut)>, + async_rx: Receiver>, + sync_rx: Receiver>, + ) -> (Self, oneshot::Sender<()>) { + let (tx, rx) = oneshot::channel(); + + ( + Self { + rx, + peer, + sync_rx, + async_rx, + inbound, + outbound, + event_handle, + conn_closed_tx, + next_notification: None, + notif_tx: PollSender::new(notif_tx), + }, + tx, + ) + } + + /// Connection closed, clean up state. + /// + /// If [`NotificationProtocol`](super::NotificationProtocol) was the one that initiated + /// shut down, it's not notified of connection getting closed. + async fn close_connection(self, notify_protocol: NotifyProtocol) { + tracing::trace!( + target: LOG_TARGET, + peer = ?self.peer, + ?notify_protocol, + "close notification protocol", + ); + + let _ = self.inbound.close().await; + let _ = self.outbound.close().await; + + if std::matches!(notify_protocol, NotifyProtocol::Yes) { + let _ = self.conn_closed_tx.send(self.peer).await; + } + + self.event_handle.report_notification_stream_closed(self.peer).await; + } + + pub async fn start(mut self) { + tracing::debug!( + target: LOG_TARGET, + peer = ?self.peer, + "start connection event loop", + ); + + loop { + match self.next().await { + None | Some(ConnectionEvent::CloseConnection { notify: NotifyProtocol::Yes }) => + return self.close_connection(NotifyProtocol::Yes).await, + Some(ConnectionEvent::CloseConnection { notify: NotifyProtocol::No }) => + return self.close_connection(NotifyProtocol::No).await, + Some(ConnectionEvent::NotificationReceived { notification }) => { + if let Err(_) = self.notif_tx.send_item((self.peer, notification)) { + return self.close_connection(NotifyProtocol::Yes).await; + } + }, + } + } + } } /// Connection events. pub enum ConnectionEvent { - /// Close connection. - /// - /// If `NotificationProtocol` requested [`Connection`] to be closed, it doesn't need to be - /// notified. If, on the other hand, connection closes because it encountered an error or one - /// of the substreams was closed, `NotificationProtocol` must be informed so it can inform the - /// user. - CloseConnection { - /// Whether to notify `NotificationProtocol` or not. - notify: NotifyProtocol, - }, - - /// Notification read from the inbound substream. - /// - /// NOTE: [`Connection`] uses `PollSender::send_item()` to send the notification to user. - /// `PollSender::poll_reserve()` must be called before calling `PollSender::send_item()` or it - /// will panic. `PollSender::poll_reserve()` is called in the `Stream` implementation below - /// before polling the inbound substream to ensure the channel has capacity to receive a - /// notification. - NotificationReceived { - /// Notification. - notification: BytesMut, - }, + /// Close connection. + /// + /// If `NotificationProtocol` requested [`Connection`] to be closed, it doesn't need to be + /// notified. If, on the other hand, connection closes because it encountered an error or one + /// of the substreams was closed, `NotificationProtocol` must be informed so it can inform the + /// user. + CloseConnection { + /// Whether to notify `NotificationProtocol` or not. + notify: NotifyProtocol, + }, + + /// Notification read from the inbound substream. + /// + /// NOTE: [`Connection`] uses `PollSender::send_item()` to send the notification to user. + /// `PollSender::poll_reserve()` must be called before calling `PollSender::send_item()` or it + /// will panic. `PollSender::poll_reserve()` is called in the `Stream` implementation below + /// before polling the inbound substream to ensure the channel has capacity to receive a + /// notification. + NotificationReceived { + /// Notification. + notification: BytesMut, + }, } impl Stream for Connection { - type Item = ConnectionEvent; - - fn poll_next(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll> { - let this = Pin::into_inner(self); - - if let Poll::Ready(_) = this.rx.poll_unpin(cx) { - return Poll::Ready(Some(ConnectionEvent::CloseConnection { - notify: NotifyProtocol::No, - })); - } - - loop { - let notification = match this.next_notification.take() { - Some(notification) => Some(notification), - None => { - let future = async { - tokio::select! { - notification = this.async_rx.recv() => notification, - notification = this.sync_rx.recv() => notification, - } - }; - futures::pin_mut!(future); - - match future.poll_unpin(cx) { - Poll::Pending => None, - Poll::Ready(None) => - return Poll::Ready(Some(ConnectionEvent::CloseConnection { - notify: NotifyProtocol::Yes, - })), - Poll::Ready(Some(notification)) => Some(notification), - } - } - }; - - let Some(notification) = notification else { - break; - }; - - match this.outbound.poll_ready_unpin(cx) { - Poll::Ready(Ok(())) => {} - Poll::Pending => { - this.next_notification = Some(notification); - break; - } - Poll::Ready(Err(_)) => - return Poll::Ready(Some(ConnectionEvent::CloseConnection { - notify: NotifyProtocol::Yes, - })), - } - - if let Err(_) = this.outbound.start_send_unpin(notification.into()) { - return Poll::Ready(Some(ConnectionEvent::CloseConnection { - notify: NotifyProtocol::Yes, - })); - } - } - - match this.outbound.poll_flush_unpin(cx) { - Poll::Ready(Err(_)) => - return Poll::Ready(Some(ConnectionEvent::CloseConnection { - notify: NotifyProtocol::Yes, - })), - Poll::Ready(Ok(())) | Poll::Pending => {} - } - - if let Err(_) = futures::ready!(this.notif_tx.poll_reserve(cx)) { - return Poll::Ready(Some(ConnectionEvent::CloseConnection { - notify: NotifyProtocol::Yes, - })); - } - - match futures::ready!(this.inbound.poll_next_unpin(cx)) { - None | Some(Err(_)) => Poll::Ready(Some(ConnectionEvent::CloseConnection { - notify: NotifyProtocol::Yes, - })), - Some(Ok(notification)) => - Poll::Ready(Some(ConnectionEvent::NotificationReceived { notification })), - } - } + type Item = ConnectionEvent; + + fn poll_next(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll> { + let this = Pin::into_inner(self); + + if let Poll::Ready(_) = this.rx.poll_unpin(cx) { + return Poll::Ready(Some(ConnectionEvent::CloseConnection { + notify: NotifyProtocol::No, + })); + } + + loop { + let notification = match this.next_notification.take() { + Some(notification) => Some(notification), + None => { + let future = async { + tokio::select! { + notification = this.async_rx.recv() => notification, + notification = this.sync_rx.recv() => notification, + } + }; + futures::pin_mut!(future); + + match future.poll_unpin(cx) { + Poll::Pending => None, + Poll::Ready(None) => + return Poll::Ready(Some(ConnectionEvent::CloseConnection { + notify: NotifyProtocol::Yes, + })), + Poll::Ready(Some(notification)) => Some(notification), + } + }, + }; + + let Some(notification) = notification else { + break; + }; + + match this.outbound.poll_ready_unpin(cx) { + Poll::Ready(Ok(())) => {}, + Poll::Pending => { + this.next_notification = Some(notification); + break; + }, + Poll::Ready(Err(_)) => + return Poll::Ready(Some(ConnectionEvent::CloseConnection { + notify: NotifyProtocol::Yes, + })), + } + + if let Err(_) = this.outbound.start_send_unpin(notification.into()) { + return Poll::Ready(Some(ConnectionEvent::CloseConnection { + notify: NotifyProtocol::Yes, + })); + } + } + + match this.outbound.poll_flush_unpin(cx) { + Poll::Ready(Err(_)) => + return Poll::Ready(Some(ConnectionEvent::CloseConnection { + notify: NotifyProtocol::Yes, + })), + Poll::Ready(Ok(())) | Poll::Pending => {}, + } + + if let Err(_) = futures::ready!(this.notif_tx.poll_reserve(cx)) { + return Poll::Ready(Some(ConnectionEvent::CloseConnection { + notify: NotifyProtocol::Yes, + })); + } + + match futures::ready!(this.inbound.poll_next_unpin(cx)) { + None | Some(Err(_)) => + Poll::Ready(Some(ConnectionEvent::CloseConnection { notify: NotifyProtocol::Yes })), + Some(Ok(notification)) => + Poll::Ready(Some(ConnectionEvent::NotificationReceived { notification })), + } + } } diff --git a/client/litep2p/src/protocol/notification/handle.rs b/client/litep2p/src/protocol/notification/handle.rs index f43a90d1..1a29c330 100644 --- a/client/litep2p/src/protocol/notification/handle.rs +++ b/client/litep2p/src/protocol/notification/handle.rs @@ -19,28 +19,28 @@ // DEALINGS IN THE SOFTWARE. use crate::{ - error::Error, - protocol::notification::types::{ - Direction, InnerNotificationEvent, NotificationCommand, NotificationError, - NotificationEvent, ValidationResult, - }, - types::protocol::ProtocolName, - PeerId, + error::Error, + protocol::notification::types::{ + Direction, InnerNotificationEvent, NotificationCommand, NotificationError, + NotificationEvent, ValidationResult, + }, + types::protocol::ProtocolName, + PeerId, }; use bytes::BytesMut; use futures::Stream; use parking_lot::RwLock; use tokio::sync::{ - mpsc::{error::TrySendError, Receiver, Sender}, - oneshot, + mpsc::{error::TrySendError, Receiver, Sender}, + oneshot, }; use std::{ - collections::{HashMap, HashSet}, - pin::Pin, - sync::Arc, - task::{Context, Poll}, + collections::{HashMap, HashSet}, + pin::Pin, + sync::Arc, + task::{Context, Poll}, }; /// Logging target for the file. @@ -48,75 +48,75 @@ const LOG_TARGET: &str = "litep2p::notification::handle"; #[derive(Debug, Clone)] pub(crate) struct NotificationEventHandle { - tx: Sender, + tx: Sender, } impl NotificationEventHandle { - /// Create new [`NotificationEventHandle`]. - pub(crate) fn new(tx: Sender) -> Self { - Self { tx } - } - - /// Validate inbound substream. - pub(crate) async fn report_inbound_substream( - &self, - protocol: ProtocolName, - fallback: Option, - peer: PeerId, - handshake: Vec, - tx: oneshot::Sender, - ) { - let _ = self - .tx - .send(InnerNotificationEvent::ValidateSubstream { - protocol, - fallback, - peer, - handshake, - tx, - }) - .await; - } - - /// Notification stream opened. - pub(crate) async fn report_notification_stream_opened( - &self, - protocol: ProtocolName, - fallback: Option, - direction: Direction, - peer: PeerId, - handshake: Vec, - sink: NotificationSink, - ) { - let _ = self - .tx - .send(InnerNotificationEvent::NotificationStreamOpened { - protocol, - fallback, - direction, - peer, - handshake, - sink, - }) - .await; - } - - /// Notification stream closed. - pub(crate) async fn report_notification_stream_closed(&self, peer: PeerId) { - let _ = self.tx.send(InnerNotificationEvent::NotificationStreamClosed { peer }).await; - } - - /// Failed to open notification stream. - pub(crate) async fn report_notification_stream_open_failure( - &self, - peer: PeerId, - error: NotificationError, - ) { - let _ = self - .tx - .send(InnerNotificationEvent::NotificationStreamOpenFailure { peer, error }) - .await; - } + /// Create new [`NotificationEventHandle`]. + pub(crate) fn new(tx: Sender) -> Self { + Self { tx } + } + + /// Validate inbound substream. + pub(crate) async fn report_inbound_substream( + &self, + protocol: ProtocolName, + fallback: Option, + peer: PeerId, + handshake: Vec, + tx: oneshot::Sender, + ) { + let _ = self + .tx + .send(InnerNotificationEvent::ValidateSubstream { + protocol, + fallback, + peer, + handshake, + tx, + }) + .await; + } + + /// Notification stream opened. + pub(crate) async fn report_notification_stream_opened( + &self, + protocol: ProtocolName, + fallback: Option, + direction: Direction, + peer: PeerId, + handshake: Vec, + sink: NotificationSink, + ) { + let _ = self + .tx + .send(InnerNotificationEvent::NotificationStreamOpened { + protocol, + fallback, + direction, + peer, + handshake, + sink, + }) + .await; + } + + /// Notification stream closed. + pub(crate) async fn report_notification_stream_closed(&self, peer: PeerId) { + let _ = self.tx.send(InnerNotificationEvent::NotificationStreamClosed { peer }).await; + } + + /// Failed to open notification stream. + pub(crate) async fn report_notification_stream_open_failure( + &self, + peer: PeerId, + error: NotificationError, + ) { + let _ = self + .tx + .send(InnerNotificationEvent::NotificationStreamOpenFailure { peer, error }) + .await; + } } /// Notification sink. @@ -124,400 +124,389 @@ impl NotificationEventHandle { /// Allows the user to send notifications both synchronously and asynchronously. #[derive(Debug, Clone)] pub struct NotificationSink { - /// Peer ID. - peer: PeerId, + /// Peer ID. + peer: PeerId, - /// TX channel for sending notifications synchronously. - sync_tx: Sender>, + /// TX channel for sending notifications synchronously. + sync_tx: Sender>, - /// TX channel for sending notifications asynchronously. - async_tx: Sender>, + /// TX channel for sending notifications asynchronously. + async_tx: Sender>, } impl NotificationSink { - /// Create new [`NotificationSink`]. - pub(crate) fn new(peer: PeerId, sync_tx: Sender>, async_tx: Sender>) -> Self { - Self { - peer, - async_tx, - sync_tx, - } - } - - /// Send notification to `peer` synchronously. - /// - /// If the channel is clogged, [`NotificationError::ChannelClogged`] is returned. - pub fn send_sync_notification(&self, notification: Vec) -> Result<(), NotificationError> { - self.sync_tx.try_send(notification).map_err(|error| match error { - TrySendError::Closed(_) => NotificationError::NoConnection, - TrySendError::Full(_) => NotificationError::ChannelClogged, - }) - } - - /// Send notification to `peer` asynchronously, waiting for the channel to have capacity - /// if it's clogged. - /// - /// Returns [`Error::PeerDoesntExist(PeerId)`](crate::error::Error::PeerDoesntExist) - /// if the connection has been closed. - pub async fn send_async_notification(&self, notification: Vec) -> crate::Result<()> { - self.async_tx - .send(notification) - .await - .map_err(|_| Error::PeerDoesntExist(self.peer)) - } + /// Create new [`NotificationSink`]. + pub(crate) fn new(peer: PeerId, sync_tx: Sender>, async_tx: Sender>) -> Self { + Self { peer, async_tx, sync_tx } + } + + /// Send notification to `peer` synchronously. + /// + /// If the channel is clogged, [`NotificationError::ChannelClogged`] is returned. + pub fn send_sync_notification(&self, notification: Vec) -> Result<(), NotificationError> { + self.sync_tx.try_send(notification).map_err(|error| match error { + TrySendError::Closed(_) => NotificationError::NoConnection, + TrySendError::Full(_) => NotificationError::ChannelClogged, + }) + } + + /// Send notification to `peer` asynchronously, waiting for the channel to have capacity + /// if it's clogged. + /// + /// Returns [`Error::PeerDoesntExist(PeerId)`](crate::error::Error::PeerDoesntExist) + /// if the connection has been closed. + pub async fn send_async_notification(&self, notification: Vec) -> crate::Result<()> { + self.async_tx + .send(notification) + .await + .map_err(|_| Error::PeerDoesntExist(self.peer)) + } } /// Handle allowing the user protocol to interact with the notification protocol. #[derive(Debug)] pub struct NotificationHandle { - /// RX channel for receiving events from the notification protocol. - event_rx: Receiver, + /// RX channel for receiving events from the notification protocol. + event_rx: Receiver, - /// RX channel for receiving notifications from connection handlers. - notif_rx: Receiver<(PeerId, BytesMut)>, + /// RX channel for receiving notifications from connection handlers. + notif_rx: Receiver<(PeerId, BytesMut)>, - /// TX channel for sending commands to the notification protocol. - command_tx: Sender, + /// TX channel for sending commands to the notification protocol. + command_tx: Sender, - /// Peers. - peers: HashMap, + /// Peers. + peers: HashMap, - /// Clogged peers. - clogged: HashSet, + /// Clogged peers. + clogged: HashSet, - /// Pending validations. - pending_validations: HashMap>, + /// Pending validations. + pending_validations: HashMap>, - /// Handshake. - handshake: Arc>>, + /// Handshake. + handshake: Arc>>, } impl NotificationHandle { - /// Create new [`NotificationHandle`]. - pub(crate) fn new( - event_rx: Receiver, - notif_rx: Receiver<(PeerId, BytesMut)>, - command_tx: Sender, - handshake: Arc>>, - ) -> Self { - Self { - event_rx, - notif_rx, - command_tx, - handshake, - peers: HashMap::new(), - clogged: HashSet::new(), - pending_validations: HashMap::new(), - } - } - - /// Open substream to `peer`. - /// - /// Returns [`Error::PeerAlreadyExists(PeerId)`](crate::error::Error::PeerAlreadyExists) if - /// substream is already open to `peer`. - /// - /// If connection to peer is closed, `NotificationProtocol` tries to dial the peer and if the - /// dial succeeds, tries to open a substream. This behavior can be disabled with - /// [`ConfigBuilder::with_dialing_enabled(false)`](super::config::ConfigBuilder::with_dialing_enabled()). - pub async fn open_substream(&self, peer: PeerId) -> crate::Result<()> { - tracing::trace!(target: LOG_TARGET, ?peer, "open substream"); - - if self.peers.contains_key(&peer) { - return Err(Error::PeerAlreadyExists(peer)); - } - - self.command_tx - .send(NotificationCommand::OpenSubstream { - peers: HashSet::from_iter([peer]), - }) - .await - .map_or(Ok(()), |_| Ok(())) - } - - /// Open substreams to multiple peers. - /// - /// Similar to [`NotificationHandle::open_substream()`] but multiple substreams are initiated - /// using a single call to `NotificationProtocol`. - /// - /// Peers who are already connected are ignored and returned as `Err(HashSet>)`. - pub async fn open_substream_batch( - &self, - peers: impl Iterator, - ) -> Result<(), HashSet> { - let (to_add, to_ignore): (Vec<_>, Vec<_>) = peers - .map(|peer| match self.peers.contains_key(&peer) { - true => (None, Some(peer)), - false => (Some(peer), None), - }) - .unzip(); - - let to_add = to_add.into_iter().flatten().collect::>(); - let to_ignore = to_ignore.into_iter().flatten().collect::>(); - - tracing::trace!( - target: LOG_TARGET, - peers_to_add = ?to_add.len(), - peers_to_ignore = ?to_ignore.len(), - "open substream", - ); - - let _ = self.command_tx.send(NotificationCommand::OpenSubstream { peers: to_add }).await; - - match to_ignore.is_empty() { - true => Ok(()), - false => Err(to_ignore), - } - } - - /// Try to open substreams to multiple peers. - /// - /// Similar to [`NotificationHandle::open_substream()`] but multiple substreams are initiated - /// using a single call to `NotificationProtocol`. - /// - /// If the channel is clogged, peers for whom a connection is not yet open are returned as - /// `Err(HashSet)`. - pub fn try_open_substream_batch( - &self, - peers: impl Iterator, - ) -> Result<(), HashSet> { - let (to_add, to_ignore): (Vec<_>, Vec<_>) = peers - .map(|peer| match self.peers.contains_key(&peer) { - true => (None, Some(peer)), - false => (Some(peer), None), - }) - .unzip(); - - let to_add = to_add.into_iter().flatten().collect::>(); - let to_ignore = to_ignore.into_iter().flatten().collect::>(); - - tracing::trace!( - target: LOG_TARGET, - peers_to_add = ?to_add.len(), - peers_to_ignore = ?to_ignore.len(), - "open substream", - ); - - self.command_tx - .try_send(NotificationCommand::OpenSubstream { - peers: to_add.clone(), - }) - .map_err(|_| to_add) - } - - /// Close substream to `peer`. - pub async fn close_substream(&self, peer: PeerId) { - tracing::trace!(target: LOG_TARGET, ?peer, "close substream"); - - if !self.peers.contains_key(&peer) { - return; - } - - let _ = self - .command_tx - .send(NotificationCommand::CloseSubstream { - peers: HashSet::from_iter([peer]), - }) - .await; - } - - /// Close substream to multiple peers. - /// - /// Similar to [`NotificationHandle::close_substream()`] but multiple substreams are closed - /// using a single call to `NotificationProtocol`. - pub async fn close_substream_batch(&self, peers: impl Iterator) { - let peers = peers.filter(|peer| self.peers.contains_key(peer)).collect::>(); - - if peers.is_empty() { - return; - } - - tracing::trace!( - target: LOG_TARGET, - ?peers, - "close substreams", - ); - - let _ = self.command_tx.send(NotificationCommand::CloseSubstream { peers }).await; - } - - /// Try close substream to multiple peers. - /// - /// Similar to [`NotificationHandle::close_substream()`] but multiple substreams are closed - /// using a single call to `NotificationProtocol`. - /// - /// If the channel is clogged, `peers` is returned as `Err(HashSet)`. - /// - /// If `peers` is empty after filtering all already-connected peers, - /// `Err(HashMap::new())` is returned. - pub fn try_close_substream_batch( - &self, - peers: impl Iterator, - ) -> Result<(), HashSet> { - let peers = peers.filter(|peer| self.peers.contains_key(peer)).collect::>(); - - if peers.is_empty() { - return Err(HashSet::new()); - } - - tracing::trace!( - target: LOG_TARGET, - ?peers, - "close substreams", - ); - - self.command_tx - .try_send(NotificationCommand::CloseSubstream { - peers: peers.clone(), - }) - .map_err(|_| peers) - } - - /// Set new handshake. - pub fn set_handshake(&mut self, handshake: Vec) { - tracing::trace!(target: LOG_TARGET, ?handshake, "set handshake"); - - *self.handshake.write() = handshake; - } - - /// Send validation result to the notification protocol for an inbound substream received from - /// `peer`. - pub fn send_validation_result(&mut self, peer: PeerId, result: ValidationResult) { - tracing::trace!(target: LOG_TARGET, ?peer, ?result, "send validation result"); - - self.pending_validations.remove(&peer).map(|tx| tx.send(result)); - } - - /// Send notification to `peer` synchronously. - /// - /// If the channel is clogged, [`NotificationError::ChannelClogged`] is returned. - pub fn send_sync_notification( - &mut self, - peer: PeerId, - notification: Vec, - ) -> Result<(), NotificationError> { - match self.peers.get_mut(&peer) { - Some(sink) => match sink.send_sync_notification(notification) { - Ok(()) => Ok(()), - Err(error) => match error { - NotificationError::NoConnection => Err(NotificationError::NoConnection), - NotificationError::ChannelClogged => { - let _ = self.clogged.insert(peer).then(|| { - self.command_tx.try_send(NotificationCommand::ForceClose { peer }) - }); - - Err(NotificationError::ChannelClogged) - } - // sink doesn't emit any other `NotificationError`s - _ => unreachable!(), - }, - }, - None => Ok(()), - } - } - - /// Send notification to `peer` asynchronously, waiting for the channel to have capacity - /// if it's clogged. - /// - /// Returns [`Error::PeerDoesntExist(PeerId)`](crate::error::Error::PeerDoesntExist) if the - /// connection has been closed. - pub async fn send_async_notification( - &mut self, - peer: PeerId, - notification: Vec, - ) -> crate::Result<()> { - match self.peers.get_mut(&peer) { - Some(sink) => sink.send_async_notification(notification).await, - None => Err(Error::PeerDoesntExist(peer)), - } - } - - /// Get a copy of the underlying notification sink for the peer. - /// - /// `None` is returned if `peer` doesn't exist. - pub fn notification_sink(&self, peer: PeerId) -> Option { - self.peers.get(&peer).cloned() - } - - #[cfg(feature = "fuzz")] - /// Expose functionality for fuzzing - pub async fn fuzz_send_message(&mut self, command: NotificationCommand) -> crate::Result<()> { - if let NotificationCommand::SendNotification { peer_id, notif } = command { - self.send_async_notification(peer_id, notif).await?; - } else { - let _ = self.command_tx.send(command).await; - } - Ok(()) - } + /// Create new [`NotificationHandle`]. + pub(crate) fn new( + event_rx: Receiver, + notif_rx: Receiver<(PeerId, BytesMut)>, + command_tx: Sender, + handshake: Arc>>, + ) -> Self { + Self { + event_rx, + notif_rx, + command_tx, + handshake, + peers: HashMap::new(), + clogged: HashSet::new(), + pending_validations: HashMap::new(), + } + } + + /// Open substream to `peer`. + /// + /// Returns [`Error::PeerAlreadyExists(PeerId)`](crate::error::Error::PeerAlreadyExists) if + /// substream is already open to `peer`. + /// + /// If connection to peer is closed, `NotificationProtocol` tries to dial the peer and if the + /// dial succeeds, tries to open a substream. This behavior can be disabled with + /// [`ConfigBuilder::with_dialing_enabled(false)`](super::config::ConfigBuilder::with_dialing_enabled()). + pub async fn open_substream(&self, peer: PeerId) -> crate::Result<()> { + tracing::trace!(target: LOG_TARGET, ?peer, "open substream"); + + if self.peers.contains_key(&peer) { + return Err(Error::PeerAlreadyExists(peer)); + } + + self.command_tx + .send(NotificationCommand::OpenSubstream { peers: HashSet::from_iter([peer]) }) + .await + .map_or(Ok(()), |_| Ok(())) + } + + /// Open substreams to multiple peers. + /// + /// Similar to [`NotificationHandle::open_substream()`] but multiple substreams are initiated + /// using a single call to `NotificationProtocol`. + /// + /// Peers who are already connected are ignored and returned as `Err(HashSet>)`. + pub async fn open_substream_batch( + &self, + peers: impl Iterator, + ) -> Result<(), HashSet> { + let (to_add, to_ignore): (Vec<_>, Vec<_>) = peers + .map(|peer| match self.peers.contains_key(&peer) { + true => (None, Some(peer)), + false => (Some(peer), None), + }) + .unzip(); + + let to_add = to_add.into_iter().flatten().collect::>(); + let to_ignore = to_ignore.into_iter().flatten().collect::>(); + + tracing::trace!( + target: LOG_TARGET, + peers_to_add = ?to_add.len(), + peers_to_ignore = ?to_ignore.len(), + "open substream", + ); + + let _ = self.command_tx.send(NotificationCommand::OpenSubstream { peers: to_add }).await; + + match to_ignore.is_empty() { + true => Ok(()), + false => Err(to_ignore), + } + } + + /// Try to open substreams to multiple peers. + /// + /// Similar to [`NotificationHandle::open_substream()`] but multiple substreams are initiated + /// using a single call to `NotificationProtocol`. + /// + /// If the channel is clogged, peers for whom a connection is not yet open are returned as + /// `Err(HashSet)`. + pub fn try_open_substream_batch( + &self, + peers: impl Iterator, + ) -> Result<(), HashSet> { + let (to_add, to_ignore): (Vec<_>, Vec<_>) = peers + .map(|peer| match self.peers.contains_key(&peer) { + true => (None, Some(peer)), + false => (Some(peer), None), + }) + .unzip(); + + let to_add = to_add.into_iter().flatten().collect::>(); + let to_ignore = to_ignore.into_iter().flatten().collect::>(); + + tracing::trace!( + target: LOG_TARGET, + peers_to_add = ?to_add.len(), + peers_to_ignore = ?to_ignore.len(), + "open substream", + ); + + self.command_tx + .try_send(NotificationCommand::OpenSubstream { peers: to_add.clone() }) + .map_err(|_| to_add) + } + + /// Close substream to `peer`. + pub async fn close_substream(&self, peer: PeerId) { + tracing::trace!(target: LOG_TARGET, ?peer, "close substream"); + + if !self.peers.contains_key(&peer) { + return; + } + + let _ = self + .command_tx + .send(NotificationCommand::CloseSubstream { peers: HashSet::from_iter([peer]) }) + .await; + } + + /// Close substream to multiple peers. + /// + /// Similar to [`NotificationHandle::close_substream()`] but multiple substreams are closed + /// using a single call to `NotificationProtocol`. + pub async fn close_substream_batch(&self, peers: impl Iterator) { + let peers = peers.filter(|peer| self.peers.contains_key(peer)).collect::>(); + + if peers.is_empty() { + return; + } + + tracing::trace!( + target: LOG_TARGET, + ?peers, + "close substreams", + ); + + let _ = self.command_tx.send(NotificationCommand::CloseSubstream { peers }).await; + } + + /// Try close substream to multiple peers. + /// + /// Similar to [`NotificationHandle::close_substream()`] but multiple substreams are closed + /// using a single call to `NotificationProtocol`. + /// + /// If the channel is clogged, `peers` is returned as `Err(HashSet)`. + /// + /// If `peers` is empty after filtering all already-connected peers, + /// `Err(HashMap::new())` is returned. + pub fn try_close_substream_batch( + &self, + peers: impl Iterator, + ) -> Result<(), HashSet> { + let peers = peers.filter(|peer| self.peers.contains_key(peer)).collect::>(); + + if peers.is_empty() { + return Err(HashSet::new()); + } + + tracing::trace!( + target: LOG_TARGET, + ?peers, + "close substreams", + ); + + self.command_tx + .try_send(NotificationCommand::CloseSubstream { peers: peers.clone() }) + .map_err(|_| peers) + } + + /// Set new handshake. + pub fn set_handshake(&mut self, handshake: Vec) { + tracing::trace!(target: LOG_TARGET, ?handshake, "set handshake"); + + *self.handshake.write() = handshake; + } + + /// Send validation result to the notification protocol for an inbound substream received from + /// `peer`. + pub fn send_validation_result(&mut self, peer: PeerId, result: ValidationResult) { + tracing::trace!(target: LOG_TARGET, ?peer, ?result, "send validation result"); + + self.pending_validations.remove(&peer).map(|tx| tx.send(result)); + } + + /// Send notification to `peer` synchronously. + /// + /// If the channel is clogged, [`NotificationError::ChannelClogged`] is returned. + pub fn send_sync_notification( + &mut self, + peer: PeerId, + notification: Vec, + ) -> Result<(), NotificationError> { + match self.peers.get_mut(&peer) { + Some(sink) => match sink.send_sync_notification(notification) { + Ok(()) => Ok(()), + Err(error) => match error { + NotificationError::NoConnection => Err(NotificationError::NoConnection), + NotificationError::ChannelClogged => { + let _ = self.clogged.insert(peer).then(|| { + self.command_tx.try_send(NotificationCommand::ForceClose { peer }) + }); + + Err(NotificationError::ChannelClogged) + }, + // sink doesn't emit any other `NotificationError`s + _ => unreachable!(), + }, + }, + None => Ok(()), + } + } + + /// Send notification to `peer` asynchronously, waiting for the channel to have capacity + /// if it's clogged. + /// + /// Returns [`Error::PeerDoesntExist(PeerId)`](crate::error::Error::PeerDoesntExist) if the + /// connection has been closed. + pub async fn send_async_notification( + &mut self, + peer: PeerId, + notification: Vec, + ) -> crate::Result<()> { + match self.peers.get_mut(&peer) { + Some(sink) => sink.send_async_notification(notification).await, + None => Err(Error::PeerDoesntExist(peer)), + } + } + + /// Get a copy of the underlying notification sink for the peer. + /// + /// `None` is returned if `peer` doesn't exist. + pub fn notification_sink(&self, peer: PeerId) -> Option { + self.peers.get(&peer).cloned() + } + + #[cfg(feature = "fuzz")] + /// Expose functionality for fuzzing + pub async fn fuzz_send_message(&mut self, command: NotificationCommand) -> crate::Result<()> { + if let NotificationCommand::SendNotification { peer_id, notif } = command { + self.send_async_notification(peer_id, notif).await?; + } else { + let _ = self.command_tx.send(command).await; + } + Ok(()) + } } impl Stream for NotificationHandle { - type Item = NotificationEvent; - - fn poll_next(mut self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll> { - loop { - match self.event_rx.poll_recv(cx) { - Poll::Pending => {} - Poll::Ready(None) => return Poll::Ready(None), - Poll::Ready(Some(event)) => match event { - InnerNotificationEvent::NotificationStreamOpened { - protocol, - fallback, - direction, - peer, - handshake, - sink, - } => { - self.peers.insert(peer, sink); - - return Poll::Ready(Some(NotificationEvent::NotificationStreamOpened { - protocol, - fallback, - direction, - peer, - handshake, - })); - } - InnerNotificationEvent::NotificationStreamClosed { peer } => { - self.peers.remove(&peer); - self.clogged.remove(&peer); - - return Poll::Ready(Some(NotificationEvent::NotificationStreamClosed { - peer, - })); - } - InnerNotificationEvent::ValidateSubstream { - protocol, - fallback, - peer, - handshake, - tx, - } => { - self.pending_validations.insert(peer, tx); - - return Poll::Ready(Some(NotificationEvent::ValidateSubstream { - protocol, - fallback, - peer, - handshake, - })); - } - InnerNotificationEvent::NotificationStreamOpenFailure { peer, error } => - return Poll::Ready(Some( - NotificationEvent::NotificationStreamOpenFailure { peer, error }, - )), - }, - } - - match futures::ready!(self.notif_rx.poll_recv(cx)) { - None => return Poll::Ready(None), - Some((peer, notification)) => - if self.peers.contains_key(&peer) { - return Poll::Ready(Some(NotificationEvent::NotificationReceived { - peer, - notification, - })); - }, - } - } - } + type Item = NotificationEvent; + + fn poll_next(mut self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll> { + loop { + match self.event_rx.poll_recv(cx) { + Poll::Pending => {}, + Poll::Ready(None) => return Poll::Ready(None), + Poll::Ready(Some(event)) => match event { + InnerNotificationEvent::NotificationStreamOpened { + protocol, + fallback, + direction, + peer, + handshake, + sink, + } => { + self.peers.insert(peer, sink); + + return Poll::Ready(Some(NotificationEvent::NotificationStreamOpened { + protocol, + fallback, + direction, + peer, + handshake, + })); + }, + InnerNotificationEvent::NotificationStreamClosed { peer } => { + self.peers.remove(&peer); + self.clogged.remove(&peer); + + return Poll::Ready(Some(NotificationEvent::NotificationStreamClosed { + peer, + })); + }, + InnerNotificationEvent::ValidateSubstream { + protocol, + fallback, + peer, + handshake, + tx, + } => { + self.pending_validations.insert(peer, tx); + + return Poll::Ready(Some(NotificationEvent::ValidateSubstream { + protocol, + fallback, + peer, + handshake, + })); + }, + InnerNotificationEvent::NotificationStreamOpenFailure { peer, error } => + return Poll::Ready(Some(NotificationEvent::NotificationStreamOpenFailure { + peer, + error, + })), + }, + } + + match futures::ready!(self.notif_rx.poll_recv(cx)) { + None => return Poll::Ready(None), + Some((peer, notification)) => + if self.peers.contains_key(&peer) { + return Poll::Ready(Some(NotificationEvent::NotificationReceived { + peer, + notification, + })); + }, + } + } + } } diff --git a/client/litep2p/src/protocol/notification/mod.rs b/client/litep2p/src/protocol/notification/mod.rs index a139fd71..fde36b3d 100644 --- a/client/litep2p/src/protocol/notification/mod.rs +++ b/client/litep2p/src/protocol/notification/mod.rs @@ -21,28 +21,28 @@ //! Notification protocol implementation. use crate::{ - error::{Error, SubstreamError}, - executor::Executor, - protocol::{ - self, - notification::{ - connection::Connection, - handle::NotificationEventHandle, - negotiation::{HandshakeEvent, HandshakeService}, - }, - TransportEvent, TransportService, - }, - substream::Substream, - types::{protocol::ProtocolName, SubstreamId}, - PeerId, DEFAULT_CHANNEL_SIZE, + error::{Error, SubstreamError}, + executor::Executor, + protocol::{ + self, + notification::{ + connection::Connection, + handle::NotificationEventHandle, + negotiation::{HandshakeEvent, HandshakeService}, + }, + TransportEvent, TransportService, + }, + substream::Substream, + types::{protocol::ProtocolName, SubstreamId}, + PeerId, DEFAULT_CHANNEL_SIZE, }; use bytes::BytesMut; use futures::{future::BoxFuture, stream::FuturesUnordered, StreamExt}; use multiaddr::Multiaddr; use tokio::sync::{ - mpsc::{channel, Receiver, Sender}, - oneshot, + mpsc::{channel, Receiver, Sender}, + oneshot, }; use std::{collections::HashMap, sync::Arc, time::Duration}; @@ -50,7 +50,7 @@ use std::{collections::HashMap, sync::Arc, time::Duration}; pub use config::{Config, ConfigBuilder}; pub use handle::{NotificationHandle, NotificationSink}; pub use types::{ - Direction, NotificationCommand, NotificationError, NotificationEvent, ValidationResult, + Direction, NotificationCommand, NotificationError, NotificationEvent, ValidationResult, }; mod config; @@ -71,1777 +71,1730 @@ const LOG_TARGET: &str = "litep2p::notification"; /// See [`PeerState::ValidationPending`] for more details. #[derive(Debug, PartialEq, Eq)] enum ConnectionState { - /// There is a active, transport-level connection open to the peer. - Open, + /// There is a active, transport-level connection open to the peer. + Open, - /// There is no transport-level connection open to the peer. - Closed, + /// There is no transport-level connection open to the peer. + Closed, } /// Inbound substream state. #[derive(Debug)] enum InboundState { - /// Substream is closed. - Closed, - - /// Handshake is being read from the remote node. - ReadingHandshake, - - /// Substream and its handshake are being validated by the user protocol. - Validating { - /// Inbound substream. - inbound: Substream, - }, - - /// Handshake is being sent to the remote node. - SendingHandshake, - - /// Substream is open. - Open { - /// Inbound substream. - inbound: Substream, - }, + /// Substream is closed. + Closed, + + /// Handshake is being read from the remote node. + ReadingHandshake, + + /// Substream and its handshake are being validated by the user protocol. + Validating { + /// Inbound substream. + inbound: Substream, + }, + + /// Handshake is being sent to the remote node. + SendingHandshake, + + /// Substream is open. + Open { + /// Inbound substream. + inbound: Substream, + }, } /// Outbound substream state. #[derive(Debug)] enum OutboundState { - /// Substream is closed. - Closed, - - /// Outbound substream initiated. - OutboundInitiated { - /// Substream ID. - substream: SubstreamId, - }, - - /// Substream is in the state of being negotiated. - /// - /// This process entails sending local node's handshake and reading back the remote node's - /// handshake if they've accepted the substream or detecting that the substream was closed - /// in case the substream was rejected. - Negotiating, - - /// Substream is open. - Open { - /// Received handshake. - handshake: Vec, - - /// Outbound substream. - outbound: Substream, - }, + /// Substream is closed. + Closed, + + /// Outbound substream initiated. + OutboundInitiated { + /// Substream ID. + substream: SubstreamId, + }, + + /// Substream is in the state of being negotiated. + /// + /// This process entails sending local node's handshake and reading back the remote node's + /// handshake if they've accepted the substream or detecting that the substream was closed + /// in case the substream was rejected. + Negotiating, + + /// Substream is open. + Open { + /// Received handshake. + handshake: Vec, + + /// Outbound substream. + outbound: Substream, + }, } impl OutboundState { - /// Get pending outboud substream ID, if it exists. - fn pending_open(&self) -> Option { - match &self { - OutboundState::OutboundInitiated { substream } => Some(*substream), - _ => None, - } - } + /// Get pending outboud substream ID, if it exists. + fn pending_open(&self) -> Option { + match &self { + OutboundState::OutboundInitiated { substream } => Some(*substream), + _ => None, + } + } } #[derive(Debug)] enum PeerState { - /// Peer state is poisoned due to invalid state transition. - Poisoned, - - /// Validation for an inbound substream is still pending. - /// - /// In order to enforce valid state transitions, `NotificationProtocol` keeps track of pending - /// validations across connectivity events (open/closed) and enforces that no activity happens - /// for any peer that is still awaiting validation for their inbound substream. - /// - /// If connection closes while the substream is being validated, instead of removing peer from - /// `peers`, the peer state is set as `ValidationPending` which indicates to the state machine - /// that a response for a inbound substream is pending validation. The substream itself will be - /// dead by the time validation is received if the peer state is `ValidationPending` since the - /// substream was part of a previous, now-closed substream but this state allows - /// `NotificationProtocol` to enforce correct state transitions by, e.g., rejecting new inbound - /// substream while a previous substream is still being validated or rejecting outbound - /// substreams on new connections if that same condition holds. - ValidationPending { - /// What is current connectivity state of the peer. - /// - /// If `state` is `ConnectionState::Closed` when the validation is finally received, peer - /// is removed from `peer` and if the `state` is `ConnectionState::Open`, peer is moved to - /// state `PeerState::Closed` and user is allowed to retry opening an outbound substream. - state: ConnectionState, - }, - - /// Connection to peer is closed. - Closed { - /// Connection might have been closed while there was an outbound substream still pending. - /// - /// To handle this state transition correctly in case the substream opens after the - /// connection is considered closed, store the `SubstreamId` to that it can be verified in - /// case the substream ever opens. - pending_open: Option, - }, - - /// Peer is being dialed in order to open an outbound substream to them. - Dialing, - - /// Outbound substream initiated. - OutboundInitiated { - /// Substream ID. - substream: SubstreamId, - }, - - /// Substream is being validated. - Validating { - /// Protocol. - protocol: ProtocolName, - - /// Fallback protocol, if the substream was negotiated using a fallback name. - fallback: Option, - - /// Outbound protocol state. - outbound: OutboundState, - - /// Inbound protocol state. - inbound: InboundState, - - /// Direction. - direction: Direction, - }, - - /// Notification stream has been opened. - Open { - /// `Oneshot::Sender` for shutting down the connection. - shutdown: oneshot::Sender<()>, - }, + /// Peer state is poisoned due to invalid state transition. + Poisoned, + + /// Validation for an inbound substream is still pending. + /// + /// In order to enforce valid state transitions, `NotificationProtocol` keeps track of pending + /// validations across connectivity events (open/closed) and enforces that no activity happens + /// for any peer that is still awaiting validation for their inbound substream. + /// + /// If connection closes while the substream is being validated, instead of removing peer from + /// `peers`, the peer state is set as `ValidationPending` which indicates to the state machine + /// that a response for a inbound substream is pending validation. The substream itself will be + /// dead by the time validation is received if the peer state is `ValidationPending` since the + /// substream was part of a previous, now-closed substream but this state allows + /// `NotificationProtocol` to enforce correct state transitions by, e.g., rejecting new inbound + /// substream while a previous substream is still being validated or rejecting outbound + /// substreams on new connections if that same condition holds. + ValidationPending { + /// What is current connectivity state of the peer. + /// + /// If `state` is `ConnectionState::Closed` when the validation is finally received, peer + /// is removed from `peer` and if the `state` is `ConnectionState::Open`, peer is moved to + /// state `PeerState::Closed` and user is allowed to retry opening an outbound substream. + state: ConnectionState, + }, + + /// Connection to peer is closed. + Closed { + /// Connection might have been closed while there was an outbound substream still pending. + /// + /// To handle this state transition correctly in case the substream opens after the + /// connection is considered closed, store the `SubstreamId` to that it can be verified in + /// case the substream ever opens. + pending_open: Option, + }, + + /// Peer is being dialed in order to open an outbound substream to them. + Dialing, + + /// Outbound substream initiated. + OutboundInitiated { + /// Substream ID. + substream: SubstreamId, + }, + + /// Substream is being validated. + Validating { + /// Protocol. + protocol: ProtocolName, + + /// Fallback protocol, if the substream was negotiated using a fallback name. + fallback: Option, + + /// Outbound protocol state. + outbound: OutboundState, + + /// Inbound protocol state. + inbound: InboundState, + + /// Direction. + direction: Direction, + }, + + /// Notification stream has been opened. + Open { + /// `Oneshot::Sender` for shutting down the connection. + shutdown: oneshot::Sender<()>, + }, } /// Peer context. #[derive(Debug)] struct PeerContext { - /// Peer state. - state: PeerState, + /// Peer state. + state: PeerState, } impl PeerContext { - /// Create new [`PeerContext`]. - fn new() -> Self { - Self { - state: PeerState::Closed { pending_open: None }, - } - } + /// Create new [`PeerContext`]. + fn new() -> Self { + Self { state: PeerState::Closed { pending_open: None } } + } } pub(crate) struct NotificationProtocol { - /// Transport service. - service: TransportService, + /// Transport service. + service: TransportService, - /// Protocol. - protocol: ProtocolName, + /// Protocol. + protocol: ProtocolName, - /// Auto accept inbound substream if the outbound substream was initiated by the local node. - auto_accept: bool, + /// Auto accept inbound substream if the outbound substream was initiated by the local node. + auto_accept: bool, - /// TX channel passed to the protocol used for sending events. - event_handle: NotificationEventHandle, + /// TX channel passed to the protocol used for sending events. + event_handle: NotificationEventHandle, - /// TX channel for sending shut down notifications from connection handlers to - /// [`NotificationProtocol`]. - shutdown_tx: Sender, + /// TX channel for sending shut down notifications from connection handlers to + /// [`NotificationProtocol`]. + shutdown_tx: Sender, - /// RX channel for receiving shutdown notifications from the connection handlers. - shutdown_rx: Receiver, + /// RX channel for receiving shutdown notifications from the connection handlers. + shutdown_rx: Receiver, - /// RX channel passed to the protocol used for receiving commands. - command_rx: Receiver, + /// RX channel passed to the protocol used for receiving commands. + command_rx: Receiver, - /// TX channel given to connection handlers for sending notifications. - notif_tx: Sender<(PeerId, BytesMut)>, + /// TX channel given to connection handlers for sending notifications. + notif_tx: Sender<(PeerId, BytesMut)>, - /// Connected peers. - peers: HashMap, + /// Connected peers. + peers: HashMap, - /// Pending outbound substreams. - pending_outbound: HashMap, + /// Pending outbound substreams. + pending_outbound: HashMap, - /// Handshaking service which reads and writes the handshakes to inbound - /// and outbound substreams asynchronously. - negotiation: HandshakeService, + /// Handshaking service which reads and writes the handshakes to inbound + /// and outbound substreams asynchronously. + negotiation: HandshakeService, - /// Synchronous channel size. - sync_channel_size: usize, + /// Synchronous channel size. + sync_channel_size: usize, - /// Asynchronous channel size. - async_channel_size: usize, + /// Asynchronous channel size. + async_channel_size: usize, - /// Executor for connection handlers. - executor: Arc, + /// Executor for connection handlers. + executor: Arc, - /// Pending substream validations. - pending_validations: FuturesUnordered>, + /// Pending substream validations. + pending_validations: FuturesUnordered>, - /// Timers for pending outbound substreams. - timers: FuturesUnordered>, + /// Timers for pending outbound substreams. + timers: FuturesUnordered>, - /// Should `NotificationProtocol` attempt to dial the peer. - should_dial: bool, + /// Should `NotificationProtocol` attempt to dial the peer. + should_dial: bool, } impl NotificationProtocol { - pub(crate) fn new( - service: TransportService, - config: Config, - executor: Arc, - ) -> Self { - let (shutdown_tx, shutdown_rx) = channel(DEFAULT_CHANNEL_SIZE); - - Self { - service, - shutdown_tx, - shutdown_rx, - executor, - peers: HashMap::new(), - protocol: config.protocol_name, - auto_accept: config.auto_accept, - pending_validations: FuturesUnordered::new(), - timers: FuturesUnordered::new(), - event_handle: NotificationEventHandle::new(config.event_tx), - notif_tx: config.notif_tx, - command_rx: config.command_rx, - pending_outbound: HashMap::new(), - negotiation: HandshakeService::new(config.handshake), - sync_channel_size: config.sync_channel_size, - async_channel_size: config.async_channel_size, - should_dial: config.should_dial, - } - } - - /// Connection established to remote node. - /// - /// If the peer already exists, the only valid state for it is `Dialing` as it indicates that - /// the user tried to open a substream to a peer who was not connected to local node. - /// - /// Any other state indicates that there's an error in the state transition logic. - async fn on_connection_established(&mut self, peer: PeerId) -> crate::Result<()> { - tracing::trace!(target: LOG_TARGET, ?peer, protocol = %self.protocol, "connection established"); - - let Some(context) = self.peers.get_mut(&peer) else { - self.peers.insert(peer, PeerContext::new()); - return Ok(()); - }; - - match std::mem::replace(&mut context.state, PeerState::Poisoned) { - PeerState::Dialing => { - tracing::trace!( - target: LOG_TARGET, - ?peer, - protocol = %self.protocol, - "dial succeeded, open substream to peer", - ); - - context.state = PeerState::Closed { pending_open: None }; - self.on_open_substream(peer).await - } - // connection established but validation is still pending - // - // update the connection state so that `NotificationProtocol` can proceed - // to correct state after the validation result has beern received - PeerState::ValidationPending { state } => { - debug_assert_eq!(state, ConnectionState::Closed); - - tracing::debug!( - target: LOG_TARGET, - ?peer, - protocol = %self.protocol, - "new connection established while validation still pending", - ); - - context.state = PeerState::ValidationPending { - state: ConnectionState::Open, - }; - - Ok(()) - } - state => { - tracing::error!( - target: LOG_TARGET, - ?peer, - protocol = %self.protocol, - ?state, - "state mismatch: peer already exists", - ); - debug_assert!(false); - Err(Error::PeerAlreadyExists(peer)) - } - } - } - - /// Connection closed to remote node. - /// - /// If the connection was considered open (both substreams were open), user is notified that - /// the notification stream was closed. - /// - /// If the connection was still in progress (either substream was not fully open), the user is - /// reported about it only if they had opened an outbound substream (outbound is either fully - /// open, it had been initiated or the substream was under negotiation). - async fn on_connection_closed(&mut self, peer: PeerId) -> crate::Result<()> { - tracing::trace!(target: LOG_TARGET, ?peer, protocol = %self.protocol, "connection closed"); - - self.pending_outbound.retain(|_, p| p != &peer); - - let Some(context) = self.peers.remove(&peer) else { - tracing::error!( - target: LOG_TARGET, - ?peer, - protocol = %self.protocol, - "state mismatch: peer doesn't exist", - ); - debug_assert!(false); - return Err(Error::PeerDoesntExist(peer)); - }; - - // clean up all pending state for the peer - self.negotiation.remove_outbound(&peer); - self.negotiation.remove_inbound(&peer); - - match context.state { - // outbound initiated, report open failure to peer - PeerState::OutboundInitiated { .. } => { - self.event_handle - .report_notification_stream_open_failure(peer, NotificationError::Rejected) - .await; - } - // substream fully open, report that the notification stream is closed - PeerState::Open { shutdown } => { - let _ = shutdown.send(()); - } - // if the substream was being validated, user must be notified that the substream is - // now considered rejected if they had been made aware of the existence of the pending - // connection - PeerState::Validating { - outbound, inbound, .. - } => { - match (outbound, inbound) { - // substream was being validated by the protocol when the connection was closed - (OutboundState::Closed, InboundState::Validating { .. }) => { - tracing::debug!( - target: LOG_TARGET, - ?peer, - protocol = %self.protocol, - "connection closed while validation pending", - ); - - self.peers.insert( - peer, - PeerContext { - state: PeerState::ValidationPending { - state: ConnectionState::Closed, - }, - }, - ); - } - // user either initiated an outbound substream or an outbound substream was - // opened/being opened as a result of an accepted inbound substream but was not - // yet fully open - // - // to have consistent state tracking in the user protocol, substream rejection - // must be reported to the user - ( - OutboundState::OutboundInitiated { .. } - | OutboundState::Negotiating - | OutboundState::Open { .. }, - _, - ) => { - tracing::debug!( - target: LOG_TARGET, - ?peer, - protocol = %self.protocol, - "connection closed outbound substream under negotiation", - ); - - self.event_handle - .report_notification_stream_open_failure( - peer, - NotificationError::Rejected, - ) - .await; - } - (_, _) => {} - } - } - // pending validations must be tracked across connection open/close events - PeerState::ValidationPending { .. } => { - tracing::debug!( - target: LOG_TARGET, - ?peer, - protocol = %self.protocol, - "validation pending while connection closed", - ); - - self.peers.insert( - peer, - PeerContext { - state: PeerState::ValidationPending { - state: ConnectionState::Closed, - }, - }, - ); - } - _ => {} - } - - Ok(()) - } - - /// Local node opened a substream to remote node. - /// - /// The connection can be in three different states: - /// - this is the first substream that was opened and thus the connection was initiated by the - /// local node - /// - this is a response to a previously received inbound substream which the local node - /// accepted and as a result, opened its own substream - /// - local and remote nodes opened substreams at the same time - /// - /// In the first case, the local node's handshake is sent to remote node and the substream is - /// polled in the background until they either send their handshake or close the substream. - /// - /// For the second case, the connection was initiated by the remote node and the substream was - /// accepted by the local node which initiated an outbound substream to the remote node. - /// The only valid states for this case are [`InboundState::Open`], - /// and [`InboundState::SendingHandshake`] as they imply - /// that the inbound substream have been accepted by the local node and this opened outbound - /// substream is a result of a valid state transition. - /// - /// For the third case, if the nodes have opened substreams at the same time, the outbound state - /// must be [`OutboundState::OutboundInitiated`] to ascertain that the an outbound substream was - /// actually opened. Any other state would be a state mismatch and would mean that the - /// connection is opening substreams without the permission of the protocol handler. - async fn on_outbound_substream( - &mut self, - protocol: ProtocolName, - fallback: Option, - peer: PeerId, - substream_id: SubstreamId, - outbound: Substream, - ) -> crate::Result<()> { - tracing::debug!( - target: LOG_TARGET, - ?peer, - ?protocol, - ?substream_id, - "handle outbound substream", - ); - - // peer must exist since an outbound substream was received from them - let Some(context) = self.peers.get_mut(&peer) else { - tracing::error!(target: LOG_TARGET, ?peer, "peer doesn't exist for outbound substream"); - debug_assert!(false); - return Err(Error::PeerDoesntExist(peer)); - }; - - let pending_peer = self.pending_outbound.remove(&substream_id); - - match std::mem::replace(&mut context.state, PeerState::Poisoned) { - // the connection was initiated by the local node, send handshake to remote and wait to - // receive their handshake back - PeerState::OutboundInitiated { substream } => { - debug_assert!(substream == substream_id); - debug_assert!(pending_peer == Some(peer)); - - tracing::trace!( - target: LOG_TARGET, - ?peer, - protocol = %self.protocol, - ?fallback, - ?substream_id, - "negotiate outbound protocol", - ); - - self.negotiation.negotiate_outbound(peer, outbound); - context.state = PeerState::Validating { - protocol, - fallback, - inbound: InboundState::Closed, - outbound: OutboundState::Negotiating, - direction: Direction::Outbound, - }; - } - PeerState::Validating { - protocol, - fallback, - inbound, - direction, - outbound: outbound_state, - } => { - // the inbound substream has been accepted by the local node since the handshake has - // been read and the local handshake has either already been sent or - // it's in the process of being sent. - match inbound { - InboundState::SendingHandshake | InboundState::Open { .. } => { - context.state = PeerState::Validating { - protocol, - fallback, - inbound, - direction, - outbound: OutboundState::Negotiating, - }; - self.negotiation.negotiate_outbound(peer, outbound); - } - // nodes have opened substreams at the same time - inbound_state => match outbound_state { - OutboundState::OutboundInitiated { substream } => { - debug_assert!(substream == substream_id); - - context.state = PeerState::Validating { - protocol, - fallback, - direction, - inbound: inbound_state, - outbound: OutboundState::Negotiating, - }; - self.negotiation.negotiate_outbound(peer, outbound); - } - // invalid state: more than one outbound substream has been opened - inner_state => { - tracing::error!( - target: LOG_TARGET, - ?peer, - %protocol, - ?substream_id, - ?inbound_state, - ?inner_state, - "invalid state, expected `OutboundInitiated`", - ); - - let _ = outbound.close().await; - debug_assert!(false); - } - }, - } - } - // the connection may have been closed while an outbound substream was pending - // if the outbound substream was initiated successfully, close it and reset - // `pending_open` - PeerState::Closed { pending_open } if pending_open == Some(substream_id) => { - let _ = outbound.close().await; - - context.state = PeerState::Closed { pending_open: None }; - } - state => { - tracing::error!( - target: LOG_TARGET, - ?peer, - %protocol, - ?substream_id, - ?state, - "invalid state: more than one outbound substream opened", - ); - - let _ = outbound.close().await; - debug_assert!(false); - } - } - - Ok(()) - } - - /// Remote opened a substream to local node. - /// - /// The peer can be in four different states for the inbound substream to be considered valid: - /// - the connection is closed - /// - conneection is open but substream validation from a previous connection is still pending - /// - outbound substream has been opened but not yet acknowledged by the remote peer - /// - outbound substream has been opened and acknowledged by the remote peer and it's being - /// negotiated - /// - /// If remote opened more than one substream, the new substream is simply discarded. - async fn on_inbound_substream( - &mut self, - protocol: ProtocolName, - fallback: Option, - peer: PeerId, - substream: Substream, - ) -> crate::Result<()> { - // peer must exist since an inbound substream was received from them - let Some(context) = self.peers.get_mut(&peer) else { - tracing::error!(target: LOG_TARGET, ?peer, "peer doesn't exist for inbound substream"); - debug_assert!(false); - return Err(Error::PeerDoesntExist(peer)); - }; - - tracing::debug!( - target: LOG_TARGET, - ?peer, - %protocol, - ?fallback, - state = ?context.state, - "handle inbound substream", - ); - - match std::mem::replace(&mut context.state, PeerState::Poisoned) { - // inbound substream of a previous connection is still pending validation, - // reject any new inbound substreams until an answer is heard from the user - state @ PeerState::ValidationPending { .. } => { - tracing::debug!( - target: LOG_TARGET, - ?peer, - %protocol, - ?fallback, - ?state, - "validation for previous substream still pending", - ); - - let _ = substream.close().await; - context.state = state; - } - // outbound substream for previous connection still pending, reject inbound substream - // and wait for the outbound substream state to conclude as either succeeded or failed - // before accepting any inbound substreams. - PeerState::Closed { - pending_open: Some(substream_id), - } => { - tracing::debug!( - target: LOG_TARGET, - ?peer, - protocol = %self.protocol, - "received inbound substream while outbound substream opening, rejecting", - ); - let _ = substream.close().await; - - context.state = PeerState::Closed { - pending_open: Some(substream_id), - }; - } - // the peer state is closed so this is a fresh inbound substream. - PeerState::Closed { pending_open: None } => { - self.negotiation.read_handshake(peer, substream); - - context.state = PeerState::Validating { - protocol, - fallback, - direction: Direction::Inbound, - inbound: InboundState::ReadingHandshake, - outbound: OutboundState::Closed, - }; - } - // if the connection is under validation (so an outbound substream has been opened and - // it's still pending or under negotiation), the only valid state for the - // inbound state is closed as it indicates that there isn't an inbound substream yet for - // the remote node duplicate substreams are prohibited. - PeerState::Validating { - protocol, - fallback, - outbound, - direction, - inbound: InboundState::Closed, - } => { - self.negotiation.read_handshake(peer, substream); - - context.state = PeerState::Validating { - protocol, - fallback, - outbound, - direction, - inbound: InboundState::ReadingHandshake, - }; - } - // outbound substream may have been initiated by the local node while a remote node also - // opened a substream roughly at the same time - PeerState::OutboundInitiated { - substream: outbound, - } => { - self.negotiation.read_handshake(peer, substream); - - context.state = PeerState::Validating { - protocol, - fallback, - direction: Direction::Outbound, - outbound: OutboundState::OutboundInitiated { - substream: outbound, - }, - inbound: InboundState::ReadingHandshake, - }; - } - // new inbound substream opend while validation for the previous substream was still - // pending - // - // the old substream can be considered dead because remote wouldn't open a new substream - // to us unless they had discarded the previous substream. - // - // set peer state to `ValidationPending` to indicate that the peer is "blocked" until a - // validation for the substream is heard, blocking any further activity for - // the connection and once the validation is received and in case the - // substream is accepted, it will be reported as open failure to to the peer - // because the states have gone out of sync. - PeerState::Validating { - outbound: OutboundState::Closed, - inbound: - InboundState::Validating { - inbound: pending_substream, - }, - .. - } => { - tracing::debug!( - target: LOG_TARGET, - ?peer, - protocol = %self.protocol, - "remote opened substream while previous was still pending, connection failed", - ); - let _ = substream.close().await; - let _ = pending_substream.close().await; - - context.state = PeerState::ValidationPending { - state: ConnectionState::Open, - }; - } - // remote opened another inbound substream, close it and otherwise ignore the event - // as this is a non-serious protocol violation. - state => { - tracing::debug!( - target: LOG_TARGET, - ?peer, - %protocol, - ?fallback, - ?state, - "remote opened more than one inbound substreams, discarding", - ); - - let _ = substream.close().await; - context.state = state; - } - } - - Ok(()) - } - - /// Failed to open substream to remote node. - /// - /// If the substream was initiated by the local node, it must be reported that the substream - /// failed to open. Otherwise the peer state can silently be converted to `Closed`. - async fn on_substream_open_failure( - &mut self, - substream_id: SubstreamId, - error: SubstreamError, - ) { - tracing::debug!( - target: LOG_TARGET, - protocol = %self.protocol, - ?substream_id, - ?error, - "failed to open substream" - ); - - let Some(peer) = self.pending_outbound.remove(&substream_id) else { - tracing::warn!( - target: LOG_TARGET, - protocol = %self.protocol, - ?substream_id, - "pending outbound substream doesn't exist", - ); - debug_assert!(false); - return; - }; - - // peer must exist since an outbound substream failure was received from them - let Some(context) = self.peers.get_mut(&peer) else { - tracing::warn!(target: LOG_TARGET, ?peer, "peer doesn't exist"); - debug_assert!(false); - return; - }; - - match &mut context.state { - PeerState::OutboundInitiated { .. } => { - context.state = PeerState::Closed { pending_open: None }; - - self.event_handle - .report_notification_stream_open_failure(peer, NotificationError::Rejected) - .await; - } - // if the substream was accepted by the local node and as a result, an outbound - // substream was accepted as a result this should not be reported to local node - PeerState::Validating { outbound, .. } => { - self.negotiation.remove_inbound(&peer); - self.negotiation.remove_outbound(&peer); - - let pending_open = match outbound { - OutboundState::Closed => None, - OutboundState::OutboundInitiated { substream } => { - self.event_handle - .report_notification_stream_open_failure( - peer, - NotificationError::Rejected, - ) - .await; - - Some(*substream) - } - OutboundState::Negotiating | OutboundState::Open { .. } => { - self.event_handle - .report_notification_stream_open_failure( - peer, - NotificationError::Rejected, - ) - .await; - - None - } - }; - - context.state = PeerState::Closed { pending_open }; - } - PeerState::Closed { pending_open } => { - tracing::debug!( - target: LOG_TARGET, - protocol = %self.protocol, - ?substream_id, - "substream open failure for a closed connection", - ); - debug_assert_eq!(pending_open, &Some(substream_id)); - context.state = PeerState::Closed { pending_open: None }; - } - state => { - tracing::warn!( - target: LOG_TARGET, - protocol = %self.protocol, - ?substream_id, - ?state, - "invalid state for outbound substream open failure", - ); - context.state = PeerState::Closed { pending_open: None }; - debug_assert!(false); - } - } - } - - /// Open substream to remote `peer`. - /// - /// Outbound substream can opened only if the `PeerState` is `Closed`. - /// By forcing the substream to be opened only if the state is currently closed, - /// `NotificationProtocol` can enfore more predictable state transitions. - /// - /// Other states either imply an invalid state transition ([`PeerState::Open`]) or that an - /// inbound substream has already been received and its currently being validated by the user. - async fn on_open_substream(&mut self, peer: PeerId) -> crate::Result<()> { - tracing::trace!(target: LOG_TARGET, ?peer, protocol = %self.protocol, "open substream"); - - let Some(context) = self.peers.get_mut(&peer) else { - if !self.should_dial { - tracing::debug!( - target: LOG_TARGET, - ?peer, - protocol = %self.protocol, - "connection to peer not open and dialing disabled", - ); - - self.event_handle - .report_notification_stream_open_failure(peer, NotificationError::DialFailure) - .await; - return Ok(()); - } - - match self.service.dial(&peer) { - Err(error) => { - tracing::debug!( - target: LOG_TARGET, - ?peer, - protocol = %self.protocol, - ?error, - "failed to dial peer", - ); - - self.event_handle - .report_notification_stream_open_failure( - peer, - NotificationError::DialFailure, - ) - .await; - - return Err(error.into()); - } - Ok(()) => { - tracing::trace!( - target: LOG_TARGET, - ?peer, - protocol = %self.protocol, - "started to dial peer", - ); - - self.peers.insert( - peer, - PeerContext { - state: PeerState::Dialing, - }, - ); - return Ok(()); - } - } - }; - - match context.state { - // protocol can only request a new outbound substream to be opened if the state is - // `Closed` other states imply that it's already open - PeerState::Closed { - pending_open: Some(substream_id), - } => { - tracing::trace!( - target: LOG_TARGET, - ?peer, - protocol = %self.protocol, - ?substream_id, - "outbound substream opening, reusing pending open substream", - ); - - self.pending_outbound.insert(substream_id, peer); - context.state = PeerState::OutboundInitiated { - substream: substream_id, - }; - } - PeerState::Closed { .. } => match self.service.open_substream(peer) { - Ok(substream_id) => { - tracing::trace!( - target: LOG_TARGET, - ?peer, - protocol = %self.protocol, - ?substream_id, - "outbound substream opening", - ); - - self.pending_outbound.insert(substream_id, peer); - context.state = PeerState::OutboundInitiated { - substream: substream_id, - }; - } - Err(error) => { - tracing::debug!( - target: LOG_TARGET, - ?peer, - protocol = %self.protocol, - ?error, - "failed to open substream", - ); - - self.event_handle - .report_notification_stream_open_failure( - peer, - NotificationError::NoConnection, - ) - .await; - context.state = PeerState::Closed { pending_open: None }; - } - }, - // while a validation is pending for an inbound substream, user is not allowed to open - // any outbound substreams until the old inbond substream is either accepted or rejected - PeerState::ValidationPending { .. } => { - tracing::trace!( - target: LOG_TARGET, - ?peer, - protocol = %self.protocol, - "validation still pending, rejecting outbound substream request", - ); - - self.event_handle - .report_notification_stream_open_failure( - peer, - NotificationError::ValidationPending, - ) - .await; - } - _ => {} - } - - Ok(()) - } - - /// Close substream to remote `peer`. - /// - /// This function can only be called if the substream was actually open, any other state is - /// unreachable as the user is unable to emit this command to [`NotificationProtocol`] unless - /// the connection has been fully opened. - async fn on_close_substream(&mut self, peer: PeerId) { - tracing::debug!(target: LOG_TARGET, ?peer, protocol = %self.protocol, "close substream"); - - let Some(context) = self.peers.get_mut(&peer) else { - tracing::debug!(target: LOG_TARGET, ?peer, "peer doesn't exist"); - return; - }; - - match std::mem::replace(&mut context.state, PeerState::Poisoned) { - PeerState::Open { shutdown } => { - let _ = shutdown.send(()); - - context.state = PeerState::Closed { pending_open: None }; - } - state => { - tracing::debug!( - target: LOG_TARGET, - ?peer, - protocol = %self.protocol, - ?state, - "substream already closed", - ); - context.state = state; - } - } - } - - /// Handle validation result. - /// - /// The validation result binary (accept/reject). If the node is rejected, the substreams are - /// discarded and state is set to `PeerState::Closed`. If there was an outbound substream in - /// progress while the connection was rejected by the user, the oubound state is discarded, - /// except for the substream ID of the substream which is kept for later use, in case the - /// substream happens to open. - /// - /// If the node is accepted and there is no outbound substream to them open yet, a new substream - /// is opened and once it opens, the local handshake will be sent to the remote peer and if - /// they also accept the substream the connection is considered fully open. - async fn on_validation_result( - &mut self, - peer: PeerId, - result: ValidationResult, - ) -> crate::Result<()> { - tracing::trace!( - target: LOG_TARGET, - ?peer, - protocol = %self.protocol, - ?result, - "handle validation result", - ); - - let Some(context) = self.peers.get_mut(&peer) else { - tracing::debug!(target: LOG_TARGET, ?peer, "peer doesn't exist"); - return Err(Error::PeerDoesntExist(peer)); - }; - - match std::mem::replace(&mut context.state, PeerState::Poisoned) { - PeerState::Validating { - protocol, - fallback, - outbound, - direction, - inbound: InboundState::Validating { inbound }, - } => match result { - // substream was rejected by the local node, if an outbound substream was under - // negotation, discard that data and if an outbound substream was - // initiated, save the `SubstreamId` of that substream and later if the substream - // is opened, the state can be corrected to `pending_open: None`. - ValidationResult::Reject => { - let _ = inbound.close().await; - self.negotiation.remove_outbound(&peer); - self.negotiation.remove_inbound(&peer); - context.state = PeerState::Closed { - pending_open: outbound.pending_open(), - }; - - Ok(()) - } - ValidationResult::Accept => match outbound { - // no outbound substream exists so initiate a new substream open and send the - // local handshake to remote node, indicating that the - // connection was accepted by the local node - OutboundState::Closed => match self.service.open_substream(peer) { - Ok(substream) => { - self.negotiation.send_handshake(peer, inbound); - self.pending_outbound.insert(substream, peer); - - context.state = PeerState::Validating { - protocol, - fallback, - direction, - inbound: InboundState::SendingHandshake, - outbound: OutboundState::OutboundInitiated { substream }, - }; - Ok(()) - } - // failed to open outbound substream after accepting an inbound substream - // - // since the user was notified of this substream and they accepted it, - // they expecting some kind of answer (open success/failure). - // - // report to user that the substream failed to open so they can track the - // state transitions of the peer correctly - Err(error) => { - tracing::trace!( - target: LOG_TARGET, - ?peer, - protocol = %self.protocol, - ?result, - ?error, - "failed to open outbound substream for accepted substream", - ); - - let _ = inbound.close().await; - context.state = PeerState::Closed { pending_open: None }; - - self.event_handle - .report_notification_stream_open_failure( - peer, - NotificationError::Rejected, - ) - .await; - - Err(error.into()) - } - }, - // here the state is one of `OutboundState::{OutboundInitiated, Negotiating, - // Open}` so that state can be safely ignored and all that - // has to be done is to send the local handshake to remote - // node to indicate that the connection was accepted. - _ => { - self.negotiation.send_handshake(peer, inbound); - - context.state = PeerState::Validating { - protocol, - fallback, - direction, - inbound: InboundState::SendingHandshake, - outbound, - }; - Ok(()) - } - }, - }, - // validation result received for an inbound substream which is now considered dead - // because while the substream was being validated, the connection had closed. - // - // if the substream was rejected and there is no active connection to the peer, - // just remove the peer from `peers` without informing user - // - // if the substream was accepted, the user must be informed that the substream failed to - // open. Depending on whether there is currently a connection open to the peer, either - // report `Rejected`/`NoConnection` and let the user try again. - PeerState::ValidationPending { state } => { - if let Some(error) = match state { - ConnectionState::Open => { - context.state = PeerState::Closed { pending_open: None }; - - std::matches!(result, ValidationResult::Accept) - .then_some(NotificationError::Rejected) - } - ConnectionState::Closed => { - self.peers.remove(&peer); - - std::matches!(result, ValidationResult::Accept) - .then_some(NotificationError::NoConnection) - } - } { - self.event_handle.report_notification_stream_open_failure(peer, error).await; - } - - Ok(()) - } - // if the user incorrectly send a validation result for a peer that doesn't require - // validation, set state back to what it was and ignore the event - // - // the user protocol may send a stale validation result not because of a programming - // error but because it has a backlock of unhandled events, with one event potentially - // nullifying the need for substream validation, and is just temporarily out of sync - // with `NotificationProtocol` - state => { - tracing::debug!( - target: LOG_TARGET, - ?peer, - protocol = %self.protocol, - ?state, - "validation result received for peer that doesn't require validation", - ); - - context.state = state; - Ok(()) - } - } - } - - /// Handle handshake event. - /// - /// There are three different handshake event types: - /// - outbound substream negotiated - /// - inbound substream negotiated - /// - substream negotiation error - /// - /// Neither outbound nor inbound substream negotiated automatically means that the connection is - /// considered open as both substreams must be fully negotiated for that to be the case. That is - /// why the peer state for inbound and outbound are set separately and at the end of the - /// function is the collective state of the substreams checked and if both substreams are - /// negotiated, the user informed that the connection is open. - /// - /// If the negotiation fails, the user may have to be informed of that. Outbound substream - /// failure always results in user getting notified since the existence of an outbound substream - /// means that the user has either initiated an outbound substreams or has accepted an inbound - /// substreams, resulting in an outbound substreams. - /// - /// Negotiation failure for inbound substreams which are in the state - /// [`InboundState::ReadingHandshake`] don't result in any notification because while the - /// handshake is being read from the substream, the user is oblivious to the fact that an - /// inbound substream has even been received. - async fn on_handshake_event(&mut self, peer: PeerId, event: HandshakeEvent) { - let Some(context) = self.peers.get_mut(&peer) else { - tracing::error!(target: LOG_TARGET, "invalid state: negotiation event received but peer doesn't exist"); - debug_assert!(false); - return; - }; - - tracing::trace!( - target: LOG_TARGET, - ?peer, - protocol = %self.protocol, - ?event, - "handle handshake event", - ); - - match event { - // either an inbound or outbound substream has been negotiated successfully - HandshakeEvent::Negotiated { - peer, - handshake, - substream, - direction, - } => match direction { - // outbound substream was negotiated, the only valid state for peer is `Validating` - // and only valid state for `OutboundState` is `Negotiating` - negotiation::Direction::Outbound => { - self.negotiation.remove_outbound(&peer); - - match std::mem::replace(&mut context.state, PeerState::Poisoned) { - PeerState::Validating { - protocol, - fallback, - direction, - outbound: OutboundState::Negotiating, - inbound, - } => { - context.state = PeerState::Validating { - protocol, - fallback, - direction, - outbound: OutboundState::Open { - handshake, - outbound: substream, - }, - inbound, - }; - } - state => { - tracing::warn!( - target: LOG_TARGET, - ?peer, - ?state, - "outbound substream negotiated but peer has invalid state", - ); - debug_assert!(false); - } - } - } - // inbound negotiation event completed - // - // the negotiation event can be on of two different types: - // - remote handshake was read from the substream - // - local handshake has been sent to remote node - // - // For the first case, the substream has to be validated by the local node. - // This means reporting the protocol name, potential negotiated fallback and the - // handshake. Local node will then either accept or reject the substream which is - // handled by [`NotificationProtocol::on_validation_result()`]. Compared to - // Substrate, litep2p requires both peers to validate the inbound handshake to allow - // more complex connection validation. If this is not necessary and the protocol - // wishes to auto-accept the inbound substreams that are a result of - // an outbound substream already accepted by the remote node, the - // substream validation is skipped and the local handshake is sent - // right away. - // - // For the second case, the local handshake was sent to remote node successfully and - // the inbound substream is considered open and if the outbound - // substream is open as well, the connection is fully open. - // - // Only valid states for [`InboundState`] are [`InboundState::ReadingHandshake`] and - // [`InboundState::SendingHandshake`] because otherwise the inbound - // substream cannot be in [`HandshakeService`](super::negotiation::HandshakeService) - // unless there is a logic bug in the state machine. - negotiation::Direction::Inbound => { - self.negotiation.remove_inbound(&peer); - - match std::mem::replace(&mut context.state, PeerState::Poisoned) { - PeerState::Validating { - protocol, - fallback, - direction, - outbound, - inbound: InboundState::ReadingHandshake, - } => { - if !std::matches!(outbound, OutboundState::Closed) && self.auto_accept { - tracing::trace!( - target: LOG_TARGET, - ?peer, - %protocol, - ?fallback, - ?direction, - ?outbound, - "auto-accept inbound substream", - ); - - self.negotiation.send_handshake(peer, substream); - context.state = PeerState::Validating { - protocol, - fallback, - direction, - inbound: InboundState::SendingHandshake, - outbound, - }; - - return; - } - - tracing::trace!( - target: LOG_TARGET, - ?peer, - %protocol, - ?fallback, - ?outbound, - "send inbound protocol for validation", - ); - - context.state = PeerState::Validating { - protocol: protocol.clone(), - fallback: fallback.clone(), - inbound: InboundState::Validating { inbound: substream }, - outbound, - direction, - }; - - let (tx, rx) = oneshot::channel(); - self.pending_validations.push(Box::pin(async move { - match rx.await { - Ok(ValidationResult::Accept) => - (peer, ValidationResult::Accept), - _ => (peer, ValidationResult::Reject), - } - })); - - self.event_handle - .report_inbound_substream(protocol, fallback, peer, handshake, tx) - .await; - } - PeerState::Validating { - protocol, - fallback, - direction, - inbound: InboundState::SendingHandshake, - outbound, - } => { - tracing::trace!( - target: LOG_TARGET, - ?peer, - %protocol, - ?fallback, - "inbound substream negotiated, waiting for outbound substream to complete", - ); - - context.state = PeerState::Validating { - protocol: protocol.clone(), - fallback: fallback.clone(), - inbound: InboundState::Open { inbound: substream }, - outbound, - direction, - }; - } - _state => debug_assert!(false), - } - } - }, - // error occurred during negotiation, eitehr for inbound or outbound substream - // user is notified of the error only if they've either initiated an outbound substream - // or if they accepted an inbound substream and as a result initiated an outbound - // substream. - HandshakeEvent::NegotiationError { peer, direction } => { - tracing::debug!( - target: LOG_TARGET, - ?peer, - protocol = %self.protocol, - ?direction, - state = ?context.state, - "failed to negotiate substream", - ); - let _ = self.negotiation.remove_outbound(&peer); - let _ = self.negotiation.remove_inbound(&peer); - - // if an outbound substream had been initiated (whatever its state is), it means - // that the user knows about the connection and must be notified that it failed to - // negotiate. - match std::mem::replace(&mut context.state, PeerState::Poisoned) { - PeerState::Validating { outbound, .. } => { - context.state = PeerState::Closed { - pending_open: outbound.pending_open(), - }; - - // notify user if the outbound substream is not considered closed - if !std::matches!(outbound, OutboundState::Closed) { - return self - .event_handle - .report_notification_stream_open_failure( - peer, - NotificationError::Rejected, - ) - .await; - } - } - _state => debug_assert!(false), - } - } - } - - // if both inbound and outbound substreams are considered open, notify the user that - // a notification stream has been opened and set up for sending and receiving - // notifications to and from remote node - match std::mem::replace(&mut context.state, PeerState::Poisoned) { - PeerState::Validating { - protocol, - fallback, - direction, - outbound: - OutboundState::Open { - handshake, - outbound, - }, - inbound: InboundState::Open { inbound }, - } => { - tracing::debug!( - target: LOG_TARGET, - ?peer, - %protocol, - ?fallback, - "notification stream opened", - ); - - let (async_tx, async_rx) = channel(self.async_channel_size); - let (sync_tx, sync_rx) = channel(self.sync_channel_size); - let sink = NotificationSink::new(peer, sync_tx, async_tx); - - // start connection handler for the peer which only deals with sending/receiving - // notifications - // - // the connection handler must be started only after the newly opened notification - // substream is reported to user because the connection handler - // might exit immediately after being started if remote closed the connection. - // - // if the order of events (open & close) is not ensured to be correct, the code - // handling the connectivity logic on the `NotificationHandle` side - // might get confused about the current state of the connection. - let shutdown_tx = self.shutdown_tx.clone(); - let (connection, shutdown) = Connection::new( - peer, - inbound, - outbound, - self.event_handle.clone(), - shutdown_tx.clone(), - self.notif_tx.clone(), - async_rx, - sync_rx, - ); - - context.state = PeerState::Open { shutdown }; - self.event_handle - .report_notification_stream_opened( - protocol, fallback, direction, peer, handshake, sink, - ) - .await; - - self.executor.run(Box::pin(async move { - connection.start().await; - })); - } - state => { - tracing::trace!( - target: LOG_TARGET, - ?peer, - protocol = %self.protocol, - ?state, - "validation for substream still pending", - ); - self.timers.push(Box::pin(async move { - futures_timer::Delay::new(Duration::from_secs(5)).await; - peer - })); - - context.state = state; - } - } - } - - /// Handle dial failure. - async fn on_dial_failure(&mut self, peer: PeerId, addresses: Vec) { - tracing::trace!( - target: LOG_TARGET, - ?peer, - protocol = %self.protocol, - ?addresses, - "handle dial failure", - ); - - let Some(context) = self.peers.remove(&peer) else { - tracing::trace!( - target: LOG_TARGET, - ?peer, - protocol = %self.protocol, - ?addresses, - "dial failure for an unknown peer", - ); - return; - }; - - match context.state { - PeerState::Dialing => { - tracing::debug!(target: LOG_TARGET, ?peer, protocol = %self.protocol, ?addresses, "failed to dial peer"); - self.event_handle - .report_notification_stream_open_failure(peer, NotificationError::DialFailure) - .await; - } - state => { - tracing::trace!( - target: LOG_TARGET, - ?peer, - protocol = %self.protocol, - ?state, - "dial failure for peer that's not being dialed", - ); - self.peers.insert(peer, PeerContext { state }); - } - } - } - - /// Handle next notification event. - /// - /// Returns `true` when the user command stream was dropped. - async fn next_event(&mut self) -> bool { - // biased select is used because the substream events must be prioritized above other events - // that is because a closed substream is detected by either `substreams` or `negotiation` - // and if that event is not handled with priority but, e.g., inbound substream is - // handled before, it can create a situation where the state machine gets confused - // about the peer's state. - tokio::select! { - biased; - - event = self.negotiation.next(), if !self.negotiation.is_empty() => { - if let Some((peer, event)) = event { - self.on_handshake_event(peer, event).await; - } else { - tracing::error!(target: LOG_TARGET, "`HandshakeService` expected to return `Some(..)`"); - debug_assert!(false); - }; - } - event = self.shutdown_rx.recv() => match event { - None => (), - Some(peer) => { - if let Some(context) = self.peers.get_mut(&peer) { - tracing::trace!( - target: LOG_TARGET, - ?peer, - protocol = %self.protocol, - "notification stream to peer closed", - ); - context.state = PeerState::Closed { pending_open: None }; - } - } - }, - // TODO: https://github.com/paritytech/litep2p/issues/338 this could be combined with `Negotiation` - peer = self.timers.next(), if !self.timers.is_empty() => match peer { - Some(peer) => { - match self.peers.get_mut(&peer) { - Some(context) => match std::mem::replace(&mut context.state, PeerState::Poisoned) { - PeerState::Validating { - outbound: OutboundState::Open { outbound, .. }, - inbound: InboundState::Closed, - .. - } => { - tracing::debug!( - target: LOG_TARGET, - ?peer, - protocol = %self.protocol, - "peer didn't answer in 10 seconds, canceling substream and closing connection", - ); - context.state = PeerState::Closed { pending_open: None }; - - let _ = outbound.close().await; - self.event_handle - .report_notification_stream_open_failure(peer, NotificationError::Rejected) - .await; - - // NOTE: this is used to work around an issue in Substrate where the protocol - // is not notified if an inbound substream is closed. That indicates that remote - // wishes the close the connection but `Notifications` still keeps the substream state - // as `Open` until the outbound substream is closed (even though the outbound substream - // is also closed at that point). This causes a further issue: inbound substreams - // are automatically opened when state is `Open`, even if the inbound substream belongs - // to a new "connection" (pair of substreams). - // - // basically what happens (from Substrate's PoV) is there are pair of substreams (`inbound1`, `outbound1`), - // litep2p closes both substreams so both `inbound1` and outbound1 become non-readable/writable. - // Substrate doesn't detect this an instead only marks `inbound1` is closed while still keeping - // the (now-closed) `outbound1` active and it will be detected closed only when Substrate tries to - // write something into that substream. If now litep2p tries to open a new connection to Substrate, - // the outbound substream from litep2p's PoV will be automatically accepted (https://github.com/paritytech/polkadot-sdk/blob/59b2661444de2a25f2125a831bd786035a9fac4b/substrate/client/network/src/protocol/notifications/handler.rs#L544-L556) - // but since Substrate thinks `outbound1` is still active, it won't open a new outbound substream - // and it ends up having (`inbound2`, `outbound1`) as its pair of substreams which doens't make sense. - // - // since litep2p is expecting to receive an inbound substream from Substrate and never receives it, - // it basically can't make progress with the substream open request because litep2p can't force Substrate - // to detect that `outbound1` is closed. Easiest (and very hacky at the same time) way to reset the substream - // state is to close the connection. This is not an appropriate way to fix the issue and causes issues with, - // e.g., smoldot which at the time of writing this doesn't support the transaction protocol. The only way to fix - // this cleanly is to make Substrate detect closed substreams correctly. - if let Err(error) = self.service.force_close(peer) { - tracing::debug!( - target: LOG_TARGET, - ?peer, - protocol = %self.protocol, - ?error, - "failed to force close connection", - ); - } - } - state => { - tracing::trace!( - target: LOG_TARGET, - ?peer, - protocol = %self.protocol, - ?state, - "ignore expired timer for peer", - ); - context.state = state; - } - } - None => tracing::debug!( - target: LOG_TARGET, - ?peer, - protocol = %self.protocol, - "peer doesn't exist anymore", - ), - } - } - None => (), - }, - event = self.service.next() => match event { - Some(TransportEvent::ConnectionEstablished { peer, .. }) => { - if let Err(error) = self.on_connection_established(peer).await { - tracing::debug!( - target: LOG_TARGET, - ?peer, - ?error, - "failed to register peer", - ); - } - } - Some(TransportEvent::ConnectionClosed { peer }) => { - if let Err(error) = self.on_connection_closed(peer).await { - tracing::debug!( - target: LOG_TARGET, - ?peer, - ?error, - "failed to disconnect peer", - ); - } - } - Some(TransportEvent::SubstreamOpened { - peer, - substream, - direction, - protocol, - fallback, - }) => match direction { - protocol::Direction::Inbound => { - if let Err(error) = self.on_inbound_substream(protocol, fallback, peer, substream).await { - tracing::debug!( - target: LOG_TARGET, - ?peer, - ?error, - "failed to handle inbound substream", - ); - } - } - protocol::Direction::Outbound(substream_id) => { - if let Err(error) = self - .on_outbound_substream(protocol, fallback, peer, substream_id, substream) - .await - { - tracing::debug!( - target: LOG_TARGET, - ?peer, - ?error, - "failed to handle outbound substream", - ); - } - } - }, - Some(TransportEvent::SubstreamOpenFailure { substream, error }) => { - self.on_substream_open_failure(substream, error).await; - } - Some(TransportEvent::DialFailure { peer, addresses }) => self.on_dial_failure(peer, addresses).await, - None => { - tracing::debug!( - target: LOG_TARGET, - protocol = %self.protocol, - "transport service has exited, exiting", - ); - - return true; - } - }, - result = self.pending_validations.select_next_some(), if !self.pending_validations.is_empty() => { - if let Err(error) = self.on_validation_result(result.0, result.1).await { - tracing::debug!( - target: LOG_TARGET, - peer = ?result.0, - result = ?result.1, - ?error, - "failed to handle validation result", - ); - } - } - - // User commands. - command = self.command_rx.recv() => match command { - None => { - tracing::debug!( - target: LOG_TARGET, - protocol = %self.protocol, - "user protocol has exited, exiting" - ); - - self.service.unregister_protocol(); - - return true; - } - Some(command) => match command { - NotificationCommand::OpenSubstream { peers } => { - for peer in peers { - if let Err(error) = self.on_open_substream(peer).await { - tracing::debug!( - target: LOG_TARGET, - ?peer, - ?error, - "failed to open substream", - ); - } - } - } - NotificationCommand::CloseSubstream { peers } => { - for peer in peers { - self.on_close_substream(peer).await; - } - } - NotificationCommand::ForceClose { peer } => { - let _ = self.service.force_close(peer); - } - #[cfg(feature = "fuzz")] - NotificationCommand::SendNotification{ .. } => unreachable!() - } - }, - } - - false - } - - /// Start [`NotificationProtocol`] event loop. - pub(crate) async fn run(mut self) { - tracing::debug!(target: LOG_TARGET, "starting notification event loop"); - - while !self.next_event().await {} - } + pub(crate) fn new( + service: TransportService, + config: Config, + executor: Arc, + ) -> Self { + let (shutdown_tx, shutdown_rx) = channel(DEFAULT_CHANNEL_SIZE); + + Self { + service, + shutdown_tx, + shutdown_rx, + executor, + peers: HashMap::new(), + protocol: config.protocol_name, + auto_accept: config.auto_accept, + pending_validations: FuturesUnordered::new(), + timers: FuturesUnordered::new(), + event_handle: NotificationEventHandle::new(config.event_tx), + notif_tx: config.notif_tx, + command_rx: config.command_rx, + pending_outbound: HashMap::new(), + negotiation: HandshakeService::new(config.handshake), + sync_channel_size: config.sync_channel_size, + async_channel_size: config.async_channel_size, + should_dial: config.should_dial, + } + } + + /// Connection established to remote node. + /// + /// If the peer already exists, the only valid state for it is `Dialing` as it indicates that + /// the user tried to open a substream to a peer who was not connected to local node. + /// + /// Any other state indicates that there's an error in the state transition logic. + async fn on_connection_established(&mut self, peer: PeerId) -> crate::Result<()> { + tracing::trace!(target: LOG_TARGET, ?peer, protocol = %self.protocol, "connection established"); + + let Some(context) = self.peers.get_mut(&peer) else { + self.peers.insert(peer, PeerContext::new()); + return Ok(()); + }; + + match std::mem::replace(&mut context.state, PeerState::Poisoned) { + PeerState::Dialing => { + tracing::trace!( + target: LOG_TARGET, + ?peer, + protocol = %self.protocol, + "dial succeeded, open substream to peer", + ); + + context.state = PeerState::Closed { pending_open: None }; + self.on_open_substream(peer).await + }, + // connection established but validation is still pending + // + // update the connection state so that `NotificationProtocol` can proceed + // to correct state after the validation result has beern received + PeerState::ValidationPending { state } => { + debug_assert_eq!(state, ConnectionState::Closed); + + tracing::debug!( + target: LOG_TARGET, + ?peer, + protocol = %self.protocol, + "new connection established while validation still pending", + ); + + context.state = PeerState::ValidationPending { state: ConnectionState::Open }; + + Ok(()) + }, + state => { + tracing::error!( + target: LOG_TARGET, + ?peer, + protocol = %self.protocol, + ?state, + "state mismatch: peer already exists", + ); + debug_assert!(false); + Err(Error::PeerAlreadyExists(peer)) + }, + } + } + + /// Connection closed to remote node. + /// + /// If the connection was considered open (both substreams were open), user is notified that + /// the notification stream was closed. + /// + /// If the connection was still in progress (either substream was not fully open), the user is + /// reported about it only if they had opened an outbound substream (outbound is either fully + /// open, it had been initiated or the substream was under negotiation). + async fn on_connection_closed(&mut self, peer: PeerId) -> crate::Result<()> { + tracing::trace!(target: LOG_TARGET, ?peer, protocol = %self.protocol, "connection closed"); + + self.pending_outbound.retain(|_, p| p != &peer); + + let Some(context) = self.peers.remove(&peer) else { + tracing::error!( + target: LOG_TARGET, + ?peer, + protocol = %self.protocol, + "state mismatch: peer doesn't exist", + ); + debug_assert!(false); + return Err(Error::PeerDoesntExist(peer)); + }; + + // clean up all pending state for the peer + self.negotiation.remove_outbound(&peer); + self.negotiation.remove_inbound(&peer); + + match context.state { + // outbound initiated, report open failure to peer + PeerState::OutboundInitiated { .. } => { + self.event_handle + .report_notification_stream_open_failure(peer, NotificationError::Rejected) + .await; + }, + // substream fully open, report that the notification stream is closed + PeerState::Open { shutdown } => { + let _ = shutdown.send(()); + }, + // if the substream was being validated, user must be notified that the substream is + // now considered rejected if they had been made aware of the existence of the pending + // connection + PeerState::Validating { outbound, inbound, .. } => { + match (outbound, inbound) { + // substream was being validated by the protocol when the connection was closed + (OutboundState::Closed, InboundState::Validating { .. }) => { + tracing::debug!( + target: LOG_TARGET, + ?peer, + protocol = %self.protocol, + "connection closed while validation pending", + ); + + self.peers.insert( + peer, + PeerContext { + state: PeerState::ValidationPending { + state: ConnectionState::Closed, + }, + }, + ); + }, + // user either initiated an outbound substream or an outbound substream was + // opened/being opened as a result of an accepted inbound substream but was not + // yet fully open + // + // to have consistent state tracking in the user protocol, substream rejection + // must be reported to the user + ( + OutboundState::OutboundInitiated { .. } | + OutboundState::Negotiating | + OutboundState::Open { .. }, + _, + ) => { + tracing::debug!( + target: LOG_TARGET, + ?peer, + protocol = %self.protocol, + "connection closed outbound substream under negotiation", + ); + + self.event_handle + .report_notification_stream_open_failure( + peer, + NotificationError::Rejected, + ) + .await; + }, + (_, _) => {}, + } + }, + // pending validations must be tracked across connection open/close events + PeerState::ValidationPending { .. } => { + tracing::debug!( + target: LOG_TARGET, + ?peer, + protocol = %self.protocol, + "validation pending while connection closed", + ); + + self.peers.insert( + peer, + PeerContext { + state: PeerState::ValidationPending { state: ConnectionState::Closed }, + }, + ); + }, + _ => {}, + } + + Ok(()) + } + + /// Local node opened a substream to remote node. + /// + /// The connection can be in three different states: + /// - this is the first substream that was opened and thus the connection was initiated by the + /// local node + /// - this is a response to a previously received inbound substream which the local node + /// accepted and as a result, opened its own substream + /// - local and remote nodes opened substreams at the same time + /// + /// In the first case, the local node's handshake is sent to remote node and the substream is + /// polled in the background until they either send their handshake or close the substream. + /// + /// For the second case, the connection was initiated by the remote node and the substream was + /// accepted by the local node which initiated an outbound substream to the remote node. + /// The only valid states for this case are [`InboundState::Open`], + /// and [`InboundState::SendingHandshake`] as they imply + /// that the inbound substream have been accepted by the local node and this opened outbound + /// substream is a result of a valid state transition. + /// + /// For the third case, if the nodes have opened substreams at the same time, the outbound state + /// must be [`OutboundState::OutboundInitiated`] to ascertain that the an outbound substream was + /// actually opened. Any other state would be a state mismatch and would mean that the + /// connection is opening substreams without the permission of the protocol handler. + async fn on_outbound_substream( + &mut self, + protocol: ProtocolName, + fallback: Option, + peer: PeerId, + substream_id: SubstreamId, + outbound: Substream, + ) -> crate::Result<()> { + tracing::debug!( + target: LOG_TARGET, + ?peer, + ?protocol, + ?substream_id, + "handle outbound substream", + ); + + // peer must exist since an outbound substream was received from them + let Some(context) = self.peers.get_mut(&peer) else { + tracing::error!(target: LOG_TARGET, ?peer, "peer doesn't exist for outbound substream"); + debug_assert!(false); + return Err(Error::PeerDoesntExist(peer)); + }; + + let pending_peer = self.pending_outbound.remove(&substream_id); + + match std::mem::replace(&mut context.state, PeerState::Poisoned) { + // the connection was initiated by the local node, send handshake to remote and wait to + // receive their handshake back + PeerState::OutboundInitiated { substream } => { + debug_assert!(substream == substream_id); + debug_assert!(pending_peer == Some(peer)); + + tracing::trace!( + target: LOG_TARGET, + ?peer, + protocol = %self.protocol, + ?fallback, + ?substream_id, + "negotiate outbound protocol", + ); + + self.negotiation.negotiate_outbound(peer, outbound); + context.state = PeerState::Validating { + protocol, + fallback, + inbound: InboundState::Closed, + outbound: OutboundState::Negotiating, + direction: Direction::Outbound, + }; + }, + PeerState::Validating { + protocol, + fallback, + inbound, + direction, + outbound: outbound_state, + } => { + // the inbound substream has been accepted by the local node since the handshake has + // been read and the local handshake has either already been sent or + // it's in the process of being sent. + match inbound { + InboundState::SendingHandshake | InboundState::Open { .. } => { + context.state = PeerState::Validating { + protocol, + fallback, + inbound, + direction, + outbound: OutboundState::Negotiating, + }; + self.negotiation.negotiate_outbound(peer, outbound); + }, + // nodes have opened substreams at the same time + inbound_state => match outbound_state { + OutboundState::OutboundInitiated { substream } => { + debug_assert!(substream == substream_id); + + context.state = PeerState::Validating { + protocol, + fallback, + direction, + inbound: inbound_state, + outbound: OutboundState::Negotiating, + }; + self.negotiation.negotiate_outbound(peer, outbound); + }, + // invalid state: more than one outbound substream has been opened + inner_state => { + tracing::error!( + target: LOG_TARGET, + ?peer, + %protocol, + ?substream_id, + ?inbound_state, + ?inner_state, + "invalid state, expected `OutboundInitiated`", + ); + + let _ = outbound.close().await; + debug_assert!(false); + }, + }, + } + }, + // the connection may have been closed while an outbound substream was pending + // if the outbound substream was initiated successfully, close it and reset + // `pending_open` + PeerState::Closed { pending_open } if pending_open == Some(substream_id) => { + let _ = outbound.close().await; + + context.state = PeerState::Closed { pending_open: None }; + }, + state => { + tracing::error!( + target: LOG_TARGET, + ?peer, + %protocol, + ?substream_id, + ?state, + "invalid state: more than one outbound substream opened", + ); + + let _ = outbound.close().await; + debug_assert!(false); + }, + } + + Ok(()) + } + + /// Remote opened a substream to local node. + /// + /// The peer can be in four different states for the inbound substream to be considered valid: + /// - the connection is closed + /// - conneection is open but substream validation from a previous connection is still pending + /// - outbound substream has been opened but not yet acknowledged by the remote peer + /// - outbound substream has been opened and acknowledged by the remote peer and it's being + /// negotiated + /// + /// If remote opened more than one substream, the new substream is simply discarded. + async fn on_inbound_substream( + &mut self, + protocol: ProtocolName, + fallback: Option, + peer: PeerId, + substream: Substream, + ) -> crate::Result<()> { + // peer must exist since an inbound substream was received from them + let Some(context) = self.peers.get_mut(&peer) else { + tracing::error!(target: LOG_TARGET, ?peer, "peer doesn't exist for inbound substream"); + debug_assert!(false); + return Err(Error::PeerDoesntExist(peer)); + }; + + tracing::debug!( + target: LOG_TARGET, + ?peer, + %protocol, + ?fallback, + state = ?context.state, + "handle inbound substream", + ); + + match std::mem::replace(&mut context.state, PeerState::Poisoned) { + // inbound substream of a previous connection is still pending validation, + // reject any new inbound substreams until an answer is heard from the user + state @ PeerState::ValidationPending { .. } => { + tracing::debug!( + target: LOG_TARGET, + ?peer, + %protocol, + ?fallback, + ?state, + "validation for previous substream still pending", + ); + + let _ = substream.close().await; + context.state = state; + }, + // outbound substream for previous connection still pending, reject inbound substream + // and wait for the outbound substream state to conclude as either succeeded or failed + // before accepting any inbound substreams. + PeerState::Closed { pending_open: Some(substream_id) } => { + tracing::debug!( + target: LOG_TARGET, + ?peer, + protocol = %self.protocol, + "received inbound substream while outbound substream opening, rejecting", + ); + let _ = substream.close().await; + + context.state = PeerState::Closed { pending_open: Some(substream_id) }; + }, + // the peer state is closed so this is a fresh inbound substream. + PeerState::Closed { pending_open: None } => { + self.negotiation.read_handshake(peer, substream); + + context.state = PeerState::Validating { + protocol, + fallback, + direction: Direction::Inbound, + inbound: InboundState::ReadingHandshake, + outbound: OutboundState::Closed, + }; + }, + // if the connection is under validation (so an outbound substream has been opened and + // it's still pending or under negotiation), the only valid state for the + // inbound state is closed as it indicates that there isn't an inbound substream yet for + // the remote node duplicate substreams are prohibited. + PeerState::Validating { + protocol, + fallback, + outbound, + direction, + inbound: InboundState::Closed, + } => { + self.negotiation.read_handshake(peer, substream); + + context.state = PeerState::Validating { + protocol, + fallback, + outbound, + direction, + inbound: InboundState::ReadingHandshake, + }; + }, + // outbound substream may have been initiated by the local node while a remote node also + // opened a substream roughly at the same time + PeerState::OutboundInitiated { substream: outbound } => { + self.negotiation.read_handshake(peer, substream); + + context.state = PeerState::Validating { + protocol, + fallback, + direction: Direction::Outbound, + outbound: OutboundState::OutboundInitiated { substream: outbound }, + inbound: InboundState::ReadingHandshake, + }; + }, + // new inbound substream opend while validation for the previous substream was still + // pending + // + // the old substream can be considered dead because remote wouldn't open a new substream + // to us unless they had discarded the previous substream. + // + // set peer state to `ValidationPending` to indicate that the peer is "blocked" until a + // validation for the substream is heard, blocking any further activity for + // the connection and once the validation is received and in case the + // substream is accepted, it will be reported as open failure to to the peer + // because the states have gone out of sync. + PeerState::Validating { + outbound: OutboundState::Closed, + inbound: InboundState::Validating { inbound: pending_substream }, + .. + } => { + tracing::debug!( + target: LOG_TARGET, + ?peer, + protocol = %self.protocol, + "remote opened substream while previous was still pending, connection failed", + ); + let _ = substream.close().await; + let _ = pending_substream.close().await; + + context.state = PeerState::ValidationPending { state: ConnectionState::Open }; + }, + // remote opened another inbound substream, close it and otherwise ignore the event + // as this is a non-serious protocol violation. + state => { + tracing::debug!( + target: LOG_TARGET, + ?peer, + %protocol, + ?fallback, + ?state, + "remote opened more than one inbound substreams, discarding", + ); + + let _ = substream.close().await; + context.state = state; + }, + } + + Ok(()) + } + + /// Failed to open substream to remote node. + /// + /// If the substream was initiated by the local node, it must be reported that the substream + /// failed to open. Otherwise the peer state can silently be converted to `Closed`. + async fn on_substream_open_failure( + &mut self, + substream_id: SubstreamId, + error: SubstreamError, + ) { + tracing::debug!( + target: LOG_TARGET, + protocol = %self.protocol, + ?substream_id, + ?error, + "failed to open substream" + ); + + let Some(peer) = self.pending_outbound.remove(&substream_id) else { + tracing::warn!( + target: LOG_TARGET, + protocol = %self.protocol, + ?substream_id, + "pending outbound substream doesn't exist", + ); + debug_assert!(false); + return; + }; + + // peer must exist since an outbound substream failure was received from them + let Some(context) = self.peers.get_mut(&peer) else { + tracing::warn!(target: LOG_TARGET, ?peer, "peer doesn't exist"); + debug_assert!(false); + return; + }; + + match &mut context.state { + PeerState::OutboundInitiated { .. } => { + context.state = PeerState::Closed { pending_open: None }; + + self.event_handle + .report_notification_stream_open_failure(peer, NotificationError::Rejected) + .await; + }, + // if the substream was accepted by the local node and as a result, an outbound + // substream was accepted as a result this should not be reported to local node + PeerState::Validating { outbound, .. } => { + self.negotiation.remove_inbound(&peer); + self.negotiation.remove_outbound(&peer); + + let pending_open = match outbound { + OutboundState::Closed => None, + OutboundState::OutboundInitiated { substream } => { + self.event_handle + .report_notification_stream_open_failure( + peer, + NotificationError::Rejected, + ) + .await; + + Some(*substream) + }, + OutboundState::Negotiating | OutboundState::Open { .. } => { + self.event_handle + .report_notification_stream_open_failure( + peer, + NotificationError::Rejected, + ) + .await; + + None + }, + }; + + context.state = PeerState::Closed { pending_open }; + }, + PeerState::Closed { pending_open } => { + tracing::debug!( + target: LOG_TARGET, + protocol = %self.protocol, + ?substream_id, + "substream open failure for a closed connection", + ); + debug_assert_eq!(pending_open, &Some(substream_id)); + context.state = PeerState::Closed { pending_open: None }; + }, + state => { + tracing::warn!( + target: LOG_TARGET, + protocol = %self.protocol, + ?substream_id, + ?state, + "invalid state for outbound substream open failure", + ); + context.state = PeerState::Closed { pending_open: None }; + debug_assert!(false); + }, + } + } + + /// Open substream to remote `peer`. + /// + /// Outbound substream can opened only if the `PeerState` is `Closed`. + /// By forcing the substream to be opened only if the state is currently closed, + /// `NotificationProtocol` can enfore more predictable state transitions. + /// + /// Other states either imply an invalid state transition ([`PeerState::Open`]) or that an + /// inbound substream has already been received and its currently being validated by the user. + async fn on_open_substream(&mut self, peer: PeerId) -> crate::Result<()> { + tracing::trace!(target: LOG_TARGET, ?peer, protocol = %self.protocol, "open substream"); + + let Some(context) = self.peers.get_mut(&peer) else { + if !self.should_dial { + tracing::debug!( + target: LOG_TARGET, + ?peer, + protocol = %self.protocol, + "connection to peer not open and dialing disabled", + ); + + self.event_handle + .report_notification_stream_open_failure(peer, NotificationError::DialFailure) + .await; + return Ok(()); + } + + match self.service.dial(&peer) { + Err(error) => { + tracing::debug!( + target: LOG_TARGET, + ?peer, + protocol = %self.protocol, + ?error, + "failed to dial peer", + ); + + self.event_handle + .report_notification_stream_open_failure( + peer, + NotificationError::DialFailure, + ) + .await; + + return Err(error.into()); + }, + Ok(()) => { + tracing::trace!( + target: LOG_TARGET, + ?peer, + protocol = %self.protocol, + "started to dial peer", + ); + + self.peers.insert(peer, PeerContext { state: PeerState::Dialing }); + return Ok(()); + }, + } + }; + + match context.state { + // protocol can only request a new outbound substream to be opened if the state is + // `Closed` other states imply that it's already open + PeerState::Closed { pending_open: Some(substream_id) } => { + tracing::trace!( + target: LOG_TARGET, + ?peer, + protocol = %self.protocol, + ?substream_id, + "outbound substream opening, reusing pending open substream", + ); + + self.pending_outbound.insert(substream_id, peer); + context.state = PeerState::OutboundInitiated { substream: substream_id }; + }, + PeerState::Closed { .. } => match self.service.open_substream(peer) { + Ok(substream_id) => { + tracing::trace!( + target: LOG_TARGET, + ?peer, + protocol = %self.protocol, + ?substream_id, + "outbound substream opening", + ); + + self.pending_outbound.insert(substream_id, peer); + context.state = PeerState::OutboundInitiated { substream: substream_id }; + }, + Err(error) => { + tracing::debug!( + target: LOG_TARGET, + ?peer, + protocol = %self.protocol, + ?error, + "failed to open substream", + ); + + self.event_handle + .report_notification_stream_open_failure( + peer, + NotificationError::NoConnection, + ) + .await; + context.state = PeerState::Closed { pending_open: None }; + }, + }, + // while a validation is pending for an inbound substream, user is not allowed to open + // any outbound substreams until the old inbond substream is either accepted or rejected + PeerState::ValidationPending { .. } => { + tracing::trace!( + target: LOG_TARGET, + ?peer, + protocol = %self.protocol, + "validation still pending, rejecting outbound substream request", + ); + + self.event_handle + .report_notification_stream_open_failure( + peer, + NotificationError::ValidationPending, + ) + .await; + }, + _ => {}, + } + + Ok(()) + } + + /// Close substream to remote `peer`. + /// + /// This function can only be called if the substream was actually open, any other state is + /// unreachable as the user is unable to emit this command to [`NotificationProtocol`] unless + /// the connection has been fully opened. + async fn on_close_substream(&mut self, peer: PeerId) { + tracing::debug!(target: LOG_TARGET, ?peer, protocol = %self.protocol, "close substream"); + + let Some(context) = self.peers.get_mut(&peer) else { + tracing::debug!(target: LOG_TARGET, ?peer, "peer doesn't exist"); + return; + }; + + match std::mem::replace(&mut context.state, PeerState::Poisoned) { + PeerState::Open { shutdown } => { + let _ = shutdown.send(()); + + context.state = PeerState::Closed { pending_open: None }; + }, + state => { + tracing::debug!( + target: LOG_TARGET, + ?peer, + protocol = %self.protocol, + ?state, + "substream already closed", + ); + context.state = state; + }, + } + } + + /// Handle validation result. + /// + /// The validation result binary (accept/reject). If the node is rejected, the substreams are + /// discarded and state is set to `PeerState::Closed`. If there was an outbound substream in + /// progress while the connection was rejected by the user, the oubound state is discarded, + /// except for the substream ID of the substream which is kept for later use, in case the + /// substream happens to open. + /// + /// If the node is accepted and there is no outbound substream to them open yet, a new substream + /// is opened and once it opens, the local handshake will be sent to the remote peer and if + /// they also accept the substream the connection is considered fully open. + async fn on_validation_result( + &mut self, + peer: PeerId, + result: ValidationResult, + ) -> crate::Result<()> { + tracing::trace!( + target: LOG_TARGET, + ?peer, + protocol = %self.protocol, + ?result, + "handle validation result", + ); + + let Some(context) = self.peers.get_mut(&peer) else { + tracing::debug!(target: LOG_TARGET, ?peer, "peer doesn't exist"); + return Err(Error::PeerDoesntExist(peer)); + }; + + match std::mem::replace(&mut context.state, PeerState::Poisoned) { + PeerState::Validating { + protocol, + fallback, + outbound, + direction, + inbound: InboundState::Validating { inbound }, + } => match result { + // substream was rejected by the local node, if an outbound substream was under + // negotation, discard that data and if an outbound substream was + // initiated, save the `SubstreamId` of that substream and later if the substream + // is opened, the state can be corrected to `pending_open: None`. + ValidationResult::Reject => { + let _ = inbound.close().await; + self.negotiation.remove_outbound(&peer); + self.negotiation.remove_inbound(&peer); + context.state = PeerState::Closed { pending_open: outbound.pending_open() }; + + Ok(()) + }, + ValidationResult::Accept => match outbound { + // no outbound substream exists so initiate a new substream open and send the + // local handshake to remote node, indicating that the + // connection was accepted by the local node + OutboundState::Closed => match self.service.open_substream(peer) { + Ok(substream) => { + self.negotiation.send_handshake(peer, inbound); + self.pending_outbound.insert(substream, peer); + + context.state = PeerState::Validating { + protocol, + fallback, + direction, + inbound: InboundState::SendingHandshake, + outbound: OutboundState::OutboundInitiated { substream }, + }; + Ok(()) + }, + // failed to open outbound substream after accepting an inbound substream + // + // since the user was notified of this substream and they accepted it, + // they expecting some kind of answer (open success/failure). + // + // report to user that the substream failed to open so they can track the + // state transitions of the peer correctly + Err(error) => { + tracing::trace!( + target: LOG_TARGET, + ?peer, + protocol = %self.protocol, + ?result, + ?error, + "failed to open outbound substream for accepted substream", + ); + + let _ = inbound.close().await; + context.state = PeerState::Closed { pending_open: None }; + + self.event_handle + .report_notification_stream_open_failure( + peer, + NotificationError::Rejected, + ) + .await; + + Err(error.into()) + }, + }, + // here the state is one of `OutboundState::{OutboundInitiated, Negotiating, + // Open}` so that state can be safely ignored and all that + // has to be done is to send the local handshake to remote + // node to indicate that the connection was accepted. + _ => { + self.negotiation.send_handshake(peer, inbound); + + context.state = PeerState::Validating { + protocol, + fallback, + direction, + inbound: InboundState::SendingHandshake, + outbound, + }; + Ok(()) + }, + }, + }, + // validation result received for an inbound substream which is now considered dead + // because while the substream was being validated, the connection had closed. + // + // if the substream was rejected and there is no active connection to the peer, + // just remove the peer from `peers` without informing user + // + // if the substream was accepted, the user must be informed that the substream failed to + // open. Depending on whether there is currently a connection open to the peer, either + // report `Rejected`/`NoConnection` and let the user try again. + PeerState::ValidationPending { state } => { + if let Some(error) = match state { + ConnectionState::Open => { + context.state = PeerState::Closed { pending_open: None }; + + std::matches!(result, ValidationResult::Accept) + .then_some(NotificationError::Rejected) + }, + ConnectionState::Closed => { + self.peers.remove(&peer); + + std::matches!(result, ValidationResult::Accept) + .then_some(NotificationError::NoConnection) + }, + } { + self.event_handle.report_notification_stream_open_failure(peer, error).await; + } + + Ok(()) + }, + // if the user incorrectly send a validation result for a peer that doesn't require + // validation, set state back to what it was and ignore the event + // + // the user protocol may send a stale validation result not because of a programming + // error but because it has a backlock of unhandled events, with one event potentially + // nullifying the need for substream validation, and is just temporarily out of sync + // with `NotificationProtocol` + state => { + tracing::debug!( + target: LOG_TARGET, + ?peer, + protocol = %self.protocol, + ?state, + "validation result received for peer that doesn't require validation", + ); + + context.state = state; + Ok(()) + }, + } + } + + /// Handle handshake event. + /// + /// There are three different handshake event types: + /// - outbound substream negotiated + /// - inbound substream negotiated + /// - substream negotiation error + /// + /// Neither outbound nor inbound substream negotiated automatically means that the connection is + /// considered open as both substreams must be fully negotiated for that to be the case. That is + /// why the peer state for inbound and outbound are set separately and at the end of the + /// function is the collective state of the substreams checked and if both substreams are + /// negotiated, the user informed that the connection is open. + /// + /// If the negotiation fails, the user may have to be informed of that. Outbound substream + /// failure always results in user getting notified since the existence of an outbound substream + /// means that the user has either initiated an outbound substreams or has accepted an inbound + /// substreams, resulting in an outbound substreams. + /// + /// Negotiation failure for inbound substreams which are in the state + /// [`InboundState::ReadingHandshake`] don't result in any notification because while the + /// handshake is being read from the substream, the user is oblivious to the fact that an + /// inbound substream has even been received. + async fn on_handshake_event(&mut self, peer: PeerId, event: HandshakeEvent) { + let Some(context) = self.peers.get_mut(&peer) else { + tracing::error!(target: LOG_TARGET, "invalid state: negotiation event received but peer doesn't exist"); + debug_assert!(false); + return; + }; + + tracing::trace!( + target: LOG_TARGET, + ?peer, + protocol = %self.protocol, + ?event, + "handle handshake event", + ); + + match event { + // either an inbound or outbound substream has been negotiated successfully + HandshakeEvent::Negotiated { peer, handshake, substream, direction } => match direction + { + // outbound substream was negotiated, the only valid state for peer is `Validating` + // and only valid state for `OutboundState` is `Negotiating` + negotiation::Direction::Outbound => { + self.negotiation.remove_outbound(&peer); + + match std::mem::replace(&mut context.state, PeerState::Poisoned) { + PeerState::Validating { + protocol, + fallback, + direction, + outbound: OutboundState::Negotiating, + inbound, + } => { + context.state = PeerState::Validating { + protocol, + fallback, + direction, + outbound: OutboundState::Open { handshake, outbound: substream }, + inbound, + }; + }, + state => { + tracing::warn!( + target: LOG_TARGET, + ?peer, + ?state, + "outbound substream negotiated but peer has invalid state", + ); + debug_assert!(false); + }, + } + }, + // inbound negotiation event completed + // + // the negotiation event can be on of two different types: + // - remote handshake was read from the substream + // - local handshake has been sent to remote node + // + // For the first case, the substream has to be validated by the local node. + // This means reporting the protocol name, potential negotiated fallback and the + // handshake. Local node will then either accept or reject the substream which is + // handled by [`NotificationProtocol::on_validation_result()`]. Compared to + // Substrate, litep2p requires both peers to validate the inbound handshake to allow + // more complex connection validation. If this is not necessary and the protocol + // wishes to auto-accept the inbound substreams that are a result of + // an outbound substream already accepted by the remote node, the + // substream validation is skipped and the local handshake is sent + // right away. + // + // For the second case, the local handshake was sent to remote node successfully and + // the inbound substream is considered open and if the outbound + // substream is open as well, the connection is fully open. + // + // Only valid states for [`InboundState`] are [`InboundState::ReadingHandshake`] and + // [`InboundState::SendingHandshake`] because otherwise the inbound + // substream cannot be in [`HandshakeService`](super::negotiation::HandshakeService) + // unless there is a logic bug in the state machine. + negotiation::Direction::Inbound => { + self.negotiation.remove_inbound(&peer); + + match std::mem::replace(&mut context.state, PeerState::Poisoned) { + PeerState::Validating { + protocol, + fallback, + direction, + outbound, + inbound: InboundState::ReadingHandshake, + } => { + if !std::matches!(outbound, OutboundState::Closed) && self.auto_accept { + tracing::trace!( + target: LOG_TARGET, + ?peer, + %protocol, + ?fallback, + ?direction, + ?outbound, + "auto-accept inbound substream", + ); + + self.negotiation.send_handshake(peer, substream); + context.state = PeerState::Validating { + protocol, + fallback, + direction, + inbound: InboundState::SendingHandshake, + outbound, + }; + + return; + } + + tracing::trace!( + target: LOG_TARGET, + ?peer, + %protocol, + ?fallback, + ?outbound, + "send inbound protocol for validation", + ); + + context.state = PeerState::Validating { + protocol: protocol.clone(), + fallback: fallback.clone(), + inbound: InboundState::Validating { inbound: substream }, + outbound, + direction, + }; + + let (tx, rx) = oneshot::channel(); + self.pending_validations.push(Box::pin(async move { + match rx.await { + Ok(ValidationResult::Accept) => + (peer, ValidationResult::Accept), + _ => (peer, ValidationResult::Reject), + } + })); + + self.event_handle + .report_inbound_substream(protocol, fallback, peer, handshake, tx) + .await; + }, + PeerState::Validating { + protocol, + fallback, + direction, + inbound: InboundState::SendingHandshake, + outbound, + } => { + tracing::trace!( + target: LOG_TARGET, + ?peer, + %protocol, + ?fallback, + "inbound substream negotiated, waiting for outbound substream to complete", + ); + + context.state = PeerState::Validating { + protocol: protocol.clone(), + fallback: fallback.clone(), + inbound: InboundState::Open { inbound: substream }, + outbound, + direction, + }; + }, + _state => debug_assert!(false), + } + }, + }, + // error occurred during negotiation, eitehr for inbound or outbound substream + // user is notified of the error only if they've either initiated an outbound substream + // or if they accepted an inbound substream and as a result initiated an outbound + // substream. + HandshakeEvent::NegotiationError { peer, direction } => { + tracing::debug!( + target: LOG_TARGET, + ?peer, + protocol = %self.protocol, + ?direction, + state = ?context.state, + "failed to negotiate substream", + ); + let _ = self.negotiation.remove_outbound(&peer); + let _ = self.negotiation.remove_inbound(&peer); + + // if an outbound substream had been initiated (whatever its state is), it means + // that the user knows about the connection and must be notified that it failed to + // negotiate. + match std::mem::replace(&mut context.state, PeerState::Poisoned) { + PeerState::Validating { outbound, .. } => { + context.state = PeerState::Closed { pending_open: outbound.pending_open() }; + + // notify user if the outbound substream is not considered closed + if !std::matches!(outbound, OutboundState::Closed) { + return self + .event_handle + .report_notification_stream_open_failure( + peer, + NotificationError::Rejected, + ) + .await; + } + }, + _state => debug_assert!(false), + } + }, + } + + // if both inbound and outbound substreams are considered open, notify the user that + // a notification stream has been opened and set up for sending and receiving + // notifications to and from remote node + match std::mem::replace(&mut context.state, PeerState::Poisoned) { + PeerState::Validating { + protocol, + fallback, + direction, + outbound: OutboundState::Open { handshake, outbound }, + inbound: InboundState::Open { inbound }, + } => { + tracing::debug!( + target: LOG_TARGET, + ?peer, + %protocol, + ?fallback, + "notification stream opened", + ); + + let (async_tx, async_rx) = channel(self.async_channel_size); + let (sync_tx, sync_rx) = channel(self.sync_channel_size); + let sink = NotificationSink::new(peer, sync_tx, async_tx); + + // start connection handler for the peer which only deals with sending/receiving + // notifications + // + // the connection handler must be started only after the newly opened notification + // substream is reported to user because the connection handler + // might exit immediately after being started if remote closed the connection. + // + // if the order of events (open & close) is not ensured to be correct, the code + // handling the connectivity logic on the `NotificationHandle` side + // might get confused about the current state of the connection. + let shutdown_tx = self.shutdown_tx.clone(); + let (connection, shutdown) = Connection::new( + peer, + inbound, + outbound, + self.event_handle.clone(), + shutdown_tx.clone(), + self.notif_tx.clone(), + async_rx, + sync_rx, + ); + + context.state = PeerState::Open { shutdown }; + self.event_handle + .report_notification_stream_opened( + protocol, fallback, direction, peer, handshake, sink, + ) + .await; + + self.executor.run(Box::pin(async move { + connection.start().await; + })); + }, + state => { + tracing::trace!( + target: LOG_TARGET, + ?peer, + protocol = %self.protocol, + ?state, + "validation for substream still pending", + ); + self.timers.push(Box::pin(async move { + futures_timer::Delay::new(Duration::from_secs(5)).await; + peer + })); + + context.state = state; + }, + } + } + + /// Handle dial failure. + async fn on_dial_failure(&mut self, peer: PeerId, addresses: Vec) { + tracing::trace!( + target: LOG_TARGET, + ?peer, + protocol = %self.protocol, + ?addresses, + "handle dial failure", + ); + + let Some(context) = self.peers.remove(&peer) else { + tracing::trace!( + target: LOG_TARGET, + ?peer, + protocol = %self.protocol, + ?addresses, + "dial failure for an unknown peer", + ); + return; + }; + + match context.state { + PeerState::Dialing => { + tracing::debug!(target: LOG_TARGET, ?peer, protocol = %self.protocol, ?addresses, "failed to dial peer"); + self.event_handle + .report_notification_stream_open_failure(peer, NotificationError::DialFailure) + .await; + }, + state => { + tracing::trace!( + target: LOG_TARGET, + ?peer, + protocol = %self.protocol, + ?state, + "dial failure for peer that's not being dialed", + ); + self.peers.insert(peer, PeerContext { state }); + }, + } + } + + /// Handle next notification event. + /// + /// Returns `true` when the user command stream was dropped. + async fn next_event(&mut self) -> bool { + // biased select is used because the substream events must be prioritized above other events + // that is because a closed substream is detected by either `substreams` or `negotiation` + // and if that event is not handled with priority but, e.g., inbound substream is + // handled before, it can create a situation where the state machine gets confused + // about the peer's state. + tokio::select! { + biased; + + event = self.negotiation.next(), if !self.negotiation.is_empty() => { + if let Some((peer, event)) = event { + self.on_handshake_event(peer, event).await; + } else { + tracing::error!(target: LOG_TARGET, "`HandshakeService` expected to return `Some(..)`"); + debug_assert!(false); + }; + } + event = self.shutdown_rx.recv() => match event { + None => (), + Some(peer) => { + if let Some(context) = self.peers.get_mut(&peer) { + tracing::trace!( + target: LOG_TARGET, + ?peer, + protocol = %self.protocol, + "notification stream to peer closed", + ); + context.state = PeerState::Closed { pending_open: None }; + } + } + }, + // TODO: https://github.com/paritytech/litep2p/issues/338 this could be combined with `Negotiation` + peer = self.timers.next(), if !self.timers.is_empty() => match peer { + Some(peer) => { + match self.peers.get_mut(&peer) { + Some(context) => match std::mem::replace(&mut context.state, PeerState::Poisoned) { + PeerState::Validating { + outbound: OutboundState::Open { outbound, .. }, + inbound: InboundState::Closed, + .. + } => { + tracing::debug!( + target: LOG_TARGET, + ?peer, + protocol = %self.protocol, + "peer didn't answer in 10 seconds, canceling substream and closing connection", + ); + context.state = PeerState::Closed { pending_open: None }; + + let _ = outbound.close().await; + self.event_handle + .report_notification_stream_open_failure(peer, NotificationError::Rejected) + .await; + + // NOTE: this is used to work around an issue in Substrate where the protocol + // is not notified if an inbound substream is closed. That indicates that remote + // wishes the close the connection but `Notifications` still keeps the substream state + // as `Open` until the outbound substream is closed (even though the outbound substream + // is also closed at that point). This causes a further issue: inbound substreams + // are automatically opened when state is `Open`, even if the inbound substream belongs + // to a new "connection" (pair of substreams). + // + // basically what happens (from Substrate's PoV) is there are pair of substreams (`inbound1`, `outbound1`), + // litep2p closes both substreams so both `inbound1` and outbound1 become non-readable/writable. + // Substrate doesn't detect this an instead only marks `inbound1` is closed while still keeping + // the (now-closed) `outbound1` active and it will be detected closed only when Substrate tries to + // write something into that substream. If now litep2p tries to open a new connection to Substrate, + // the outbound substream from litep2p's PoV will be automatically accepted (https://github.com/paritytech/polkadot-sdk/blob/59b2661444de2a25f2125a831bd786035a9fac4b/substrate/client/network/src/protocol/notifications/handler.rs#L544-L556) + // but since Substrate thinks `outbound1` is still active, it won't open a new outbound substream + // and it ends up having (`inbound2`, `outbound1`) as its pair of substreams which doens't make sense. + // + // since litep2p is expecting to receive an inbound substream from Substrate and never receives it, + // it basically can't make progress with the substream open request because litep2p can't force Substrate + // to detect that `outbound1` is closed. Easiest (and very hacky at the same time) way to reset the substream + // state is to close the connection. This is not an appropriate way to fix the issue and causes issues with, + // e.g., smoldot which at the time of writing this doesn't support the transaction protocol. The only way to fix + // this cleanly is to make Substrate detect closed substreams correctly. + if let Err(error) = self.service.force_close(peer) { + tracing::debug!( + target: LOG_TARGET, + ?peer, + protocol = %self.protocol, + ?error, + "failed to force close connection", + ); + } + } + state => { + tracing::trace!( + target: LOG_TARGET, + ?peer, + protocol = %self.protocol, + ?state, + "ignore expired timer for peer", + ); + context.state = state; + } + } + None => tracing::debug!( + target: LOG_TARGET, + ?peer, + protocol = %self.protocol, + "peer doesn't exist anymore", + ), + } + } + None => (), + }, + event = self.service.next() => match event { + Some(TransportEvent::ConnectionEstablished { peer, .. }) => { + if let Err(error) = self.on_connection_established(peer).await { + tracing::debug!( + target: LOG_TARGET, + ?peer, + ?error, + "failed to register peer", + ); + } + } + Some(TransportEvent::ConnectionClosed { peer }) => { + if let Err(error) = self.on_connection_closed(peer).await { + tracing::debug!( + target: LOG_TARGET, + ?peer, + ?error, + "failed to disconnect peer", + ); + } + } + Some(TransportEvent::SubstreamOpened { + peer, + substream, + direction, + protocol, + fallback, + }) => match direction { + protocol::Direction::Inbound => { + if let Err(error) = self.on_inbound_substream(protocol, fallback, peer, substream).await { + tracing::debug!( + target: LOG_TARGET, + ?peer, + ?error, + "failed to handle inbound substream", + ); + } + } + protocol::Direction::Outbound(substream_id) => { + if let Err(error) = self + .on_outbound_substream(protocol, fallback, peer, substream_id, substream) + .await + { + tracing::debug!( + target: LOG_TARGET, + ?peer, + ?error, + "failed to handle outbound substream", + ); + } + } + }, + Some(TransportEvent::SubstreamOpenFailure { substream, error }) => { + self.on_substream_open_failure(substream, error).await; + } + Some(TransportEvent::DialFailure { peer, addresses }) => self.on_dial_failure(peer, addresses).await, + None => { + tracing::debug!( + target: LOG_TARGET, + protocol = %self.protocol, + "transport service has exited, exiting", + ); + + return true; + } + }, + result = self.pending_validations.select_next_some(), if !self.pending_validations.is_empty() => { + if let Err(error) = self.on_validation_result(result.0, result.1).await { + tracing::debug!( + target: LOG_TARGET, + peer = ?result.0, + result = ?result.1, + ?error, + "failed to handle validation result", + ); + } + } + + // User commands. + command = self.command_rx.recv() => match command { + None => { + tracing::debug!( + target: LOG_TARGET, + protocol = %self.protocol, + "user protocol has exited, exiting" + ); + + self.service.unregister_protocol(); + + return true; + } + Some(command) => match command { + NotificationCommand::OpenSubstream { peers } => { + for peer in peers { + if let Err(error) = self.on_open_substream(peer).await { + tracing::debug!( + target: LOG_TARGET, + ?peer, + ?error, + "failed to open substream", + ); + } + } + } + NotificationCommand::CloseSubstream { peers } => { + for peer in peers { + self.on_close_substream(peer).await; + } + } + NotificationCommand::ForceClose { peer } => { + let _ = self.service.force_close(peer); + } + #[cfg(feature = "fuzz")] + NotificationCommand::SendNotification{ .. } => unreachable!() + } + }, + } + + false + } + + /// Start [`NotificationProtocol`] event loop. + pub(crate) async fn run(mut self) { + tracing::debug!(target: LOG_TARGET, "starting notification event loop"); + + while !self.next_event().await {} + } } diff --git a/client/litep2p/src/protocol/notification/negotiation.rs b/client/litep2p/src/protocol/notification/negotiation.rs index 9c53c760..ad038fff 100644 --- a/client/litep2p/src/protocol/notification/negotiation.rs +++ b/client/litep2p/src/protocol/notification/negotiation.rs @@ -27,11 +27,11 @@ use futures_timer::Delay; use parking_lot::RwLock; use std::{ - collections::{HashMap, VecDeque}, - pin::Pin, - sync::Arc, - task::{Context, Poll}, - time::Duration, + collections::{HashMap, VecDeque}, + pin::Pin, + sync::Arc, + task::{Context, Poll}, + time::Duration, }; /// Logging target for the file. @@ -43,412 +43,377 @@ const NEGOTIATION_TIMEOUT: Duration = Duration::from_secs(10); /// Substream direction. #[derive(Debug, Copy, Clone, PartialEq, Eq, Hash)] pub enum Direction { - /// Outbound substream, opened by local node. - Outbound, + /// Outbound substream, opened by local node. + Outbound, - /// Inbound substream, opened by remote node. - Inbound, + /// Inbound substream, opened by remote node. + Inbound, } /// Events emitted by [`HandshakeService`]. #[derive(Debug)] pub enum HandshakeEvent { - /// Substream has been negotiated. - Negotiated { - /// Peer ID. - peer: PeerId, + /// Substream has been negotiated. + Negotiated { + /// Peer ID. + peer: PeerId, - /// Handshake. - handshake: Vec, + /// Handshake. + handshake: Vec, - /// Substream. - substream: Substream, + /// Substream. + substream: Substream, - /// Direction. - direction: Direction, - }, + /// Direction. + direction: Direction, + }, - /// Outbound substream has been negotiated. - NegotiationError { - /// Peer ID. - peer: PeerId, + /// Outbound substream has been negotiated. + NegotiationError { + /// Peer ID. + peer: PeerId, - /// Direction. - direction: Direction, - }, + /// Direction. + direction: Direction, + }, } /// Outbound substream's handshake state enum HandshakeState { - /// Send handshake to remote peer. - SendHandshake, + /// Send handshake to remote peer. + SendHandshake, - /// Sink is ready for the handshake to be sent. - SinkReady, + /// Sink is ready for the handshake to be sent. + SinkReady, - /// Handshake has been sent. - HandshakeSent, + /// Handshake has been sent. + HandshakeSent, - /// Read handshake from remote peer. - ReadHandshake, + /// Read handshake from remote peer. + ReadHandshake, } /// Handshake service. pub(crate) struct HandshakeService { - /// Handshake. - handshake: Arc>>, + /// Handshake. + handshake: Arc>>, - /// Pending outbound substreams. - /// Substreams: - substreams: HashMap<(PeerId, Direction), (Substream, Delay, HandshakeState)>, + /// Pending outbound substreams. + /// Substreams: + substreams: HashMap<(PeerId, Direction), (Substream, Delay, HandshakeState)>, - /// Ready substreams. - ready: VecDeque<(PeerId, Direction, Vec)>, + /// Ready substreams. + ready: VecDeque<(PeerId, Direction, Vec)>, } impl HandshakeService { - /// Create new [`HandshakeService`]. - pub fn new(handshake: Arc>>) -> Self { - Self { - handshake, - ready: VecDeque::new(), - substreams: HashMap::new(), - } - } - - /// Remove outbound substream from [`HandshakeService`]. - pub fn remove_outbound(&mut self, peer: &PeerId) -> Option { - self.substreams - .remove(&(*peer, Direction::Outbound)) - .map(|(substream, _, _)| substream) - } - - /// Remove inbound substream from [`HandshakeService`]. - pub fn remove_inbound(&mut self, peer: &PeerId) -> Option { - self.substreams - .remove(&(*peer, Direction::Inbound)) - .map(|(substream, _, _)| substream) - } - - /// Negotiate outbound handshake. - pub fn negotiate_outbound(&mut self, peer: PeerId, substream: Substream) { - tracing::trace!(target: LOG_TARGET, ?peer, "negotiate outbound"); - - self.substreams.insert( - (peer, Direction::Outbound), - ( - substream, - Delay::new(NEGOTIATION_TIMEOUT), - HandshakeState::SendHandshake, - ), - ); - } - - /// Read handshake from remote peer. - pub fn read_handshake(&mut self, peer: PeerId, substream: Substream) { - tracing::trace!(target: LOG_TARGET, ?peer, "read handshake"); - - self.substreams.insert( - (peer, Direction::Inbound), - ( - substream, - Delay::new(NEGOTIATION_TIMEOUT), - HandshakeState::ReadHandshake, - ), - ); - } - - /// Write handshake to remote peer. - pub fn send_handshake(&mut self, peer: PeerId, substream: Substream) { - tracing::trace!(target: LOG_TARGET, ?peer, "send handshake"); - - self.substreams.insert( - (peer, Direction::Inbound), - ( - substream, - Delay::new(NEGOTIATION_TIMEOUT), - HandshakeState::SendHandshake, - ), - ); - } - - /// Returns `true` if [`HandshakeService`] contains no elements. - pub fn is_empty(&self) -> bool { - self.substreams.is_empty() - } - - /// Pop event from the event queue. - /// - /// The substream may not exist in the queue anymore as it may have been removed - /// by `NotificationProtocol` if either one of the substreams failed to negotiate. - fn pop_event(&mut self) -> Option<(PeerId, HandshakeEvent)> { - while let Some((peer, direction, handshake)) = self.ready.pop_front() { - if let Some((substream, _, _)) = self.substreams.remove(&(peer, direction)) { - return Some(( - peer, - HandshakeEvent::Negotiated { - peer, - handshake, - substream, - direction, - }, - )); - } - } - - None - } + /// Create new [`HandshakeService`]. + pub fn new(handshake: Arc>>) -> Self { + Self { handshake, ready: VecDeque::new(), substreams: HashMap::new() } + } + + /// Remove outbound substream from [`HandshakeService`]. + pub fn remove_outbound(&mut self, peer: &PeerId) -> Option { + self.substreams + .remove(&(*peer, Direction::Outbound)) + .map(|(substream, _, _)| substream) + } + + /// Remove inbound substream from [`HandshakeService`]. + pub fn remove_inbound(&mut self, peer: &PeerId) -> Option { + self.substreams + .remove(&(*peer, Direction::Inbound)) + .map(|(substream, _, _)| substream) + } + + /// Negotiate outbound handshake. + pub fn negotiate_outbound(&mut self, peer: PeerId, substream: Substream) { + tracing::trace!(target: LOG_TARGET, ?peer, "negotiate outbound"); + + self.substreams.insert( + (peer, Direction::Outbound), + (substream, Delay::new(NEGOTIATION_TIMEOUT), HandshakeState::SendHandshake), + ); + } + + /// Read handshake from remote peer. + pub fn read_handshake(&mut self, peer: PeerId, substream: Substream) { + tracing::trace!(target: LOG_TARGET, ?peer, "read handshake"); + + self.substreams.insert( + (peer, Direction::Inbound), + (substream, Delay::new(NEGOTIATION_TIMEOUT), HandshakeState::ReadHandshake), + ); + } + + /// Write handshake to remote peer. + pub fn send_handshake(&mut self, peer: PeerId, substream: Substream) { + tracing::trace!(target: LOG_TARGET, ?peer, "send handshake"); + + self.substreams.insert( + (peer, Direction::Inbound), + (substream, Delay::new(NEGOTIATION_TIMEOUT), HandshakeState::SendHandshake), + ); + } + + /// Returns `true` if [`HandshakeService`] contains no elements. + pub fn is_empty(&self) -> bool { + self.substreams.is_empty() + } + + /// Pop event from the event queue. + /// + /// The substream may not exist in the queue anymore as it may have been removed + /// by `NotificationProtocol` if either one of the substreams failed to negotiate. + fn pop_event(&mut self) -> Option<(PeerId, HandshakeEvent)> { + while let Some((peer, direction, handshake)) = self.ready.pop_front() { + if let Some((substream, _, _)) = self.substreams.remove(&(peer, direction)) { + return Some(( + peer, + HandshakeEvent::Negotiated { peer, handshake, substream, direction }, + )); + } + } + + None + } } impl Stream for HandshakeService { - type Item = (PeerId, HandshakeEvent); - - fn poll_next(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll> { - let inner = Pin::into_inner(self); - - if let Some(event) = inner.pop_event() { - return Poll::Ready(Some(event)); - } - - if inner.substreams.is_empty() { - return Poll::Pending; - } - - 'outer: for ((peer, direction), (ref mut substream, ref mut timer, state)) in - inner.substreams.iter_mut() - { - if let Poll::Ready(()) = timer.poll_unpin(cx) { - return Poll::Ready(Some(( - *peer, - HandshakeEvent::NegotiationError { - peer: *peer, - direction: *direction, - }, - ))); - } - - loop { - let pinned = Pin::new(&mut *substream); - - match state { - HandshakeState::SendHandshake => match pinned.poll_ready(cx) { - Poll::Ready(Ok(())) => { - *state = HandshakeState::SinkReady; - continue; - } - Poll::Ready(Err(_)) => - return Poll::Ready(Some(( - *peer, - HandshakeEvent::NegotiationError { - peer: *peer, - direction: *direction, - }, - ))), - Poll::Pending => continue 'outer, - }, - HandshakeState::SinkReady => { - match pinned.start_send((*inner.handshake.read()).clone().into()) { - Ok(()) => { - *state = HandshakeState::HandshakeSent; - continue; - } - Err(_) => - return Poll::Ready(Some(( - *peer, - HandshakeEvent::NegotiationError { - peer: *peer, - direction: *direction, - }, - ))), - } - } - HandshakeState::HandshakeSent => match pinned.poll_flush(cx) { - Poll::Ready(Ok(())) => match direction { - Direction::Outbound => { - *state = HandshakeState::ReadHandshake; - continue; - } - Direction::Inbound => { - inner.ready.push_back((*peer, *direction, vec![])); - continue 'outer; - } - }, - Poll::Ready(Err(_)) => - return Poll::Ready(Some(( - *peer, - HandshakeEvent::NegotiationError { - peer: *peer, - direction: *direction, - }, - ))), - Poll::Pending => continue 'outer, - }, - HandshakeState::ReadHandshake => match pinned.poll_next(cx) { - Poll::Ready(Some(Ok(handshake))) => { - inner.ready.push_back((*peer, *direction, handshake.freeze().into())); - continue 'outer; - } - Poll::Ready(Some(Err(_))) | Poll::Ready(None) => { - return Poll::Ready(Some(( - *peer, - HandshakeEvent::NegotiationError { - peer: *peer, - direction: *direction, - }, - ))); - } - Poll::Pending => continue 'outer, - }, - } - } - } - - if let Some((peer, direction, handshake)) = inner.ready.pop_front() { - let (substream, _, _) = - inner.substreams.remove(&(peer, direction)).expect("peer to exist"); - - return Poll::Ready(Some(( - peer, - HandshakeEvent::Negotiated { - peer, - handshake, - substream, - direction, - }, - ))); - } - - Poll::Pending - } + type Item = (PeerId, HandshakeEvent); + + fn poll_next(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll> { + let inner = Pin::into_inner(self); + + if let Some(event) = inner.pop_event() { + return Poll::Ready(Some(event)); + } + + if inner.substreams.is_empty() { + return Poll::Pending; + } + + 'outer: for ((peer, direction), (ref mut substream, ref mut timer, state)) in + inner.substreams.iter_mut() + { + if let Poll::Ready(()) = timer.poll_unpin(cx) { + return Poll::Ready(Some(( + *peer, + HandshakeEvent::NegotiationError { peer: *peer, direction: *direction }, + ))); + } + + loop { + let pinned = Pin::new(&mut *substream); + + match state { + HandshakeState::SendHandshake => match pinned.poll_ready(cx) { + Poll::Ready(Ok(())) => { + *state = HandshakeState::SinkReady; + continue; + }, + Poll::Ready(Err(_)) => + return Poll::Ready(Some(( + *peer, + HandshakeEvent::NegotiationError { + peer: *peer, + direction: *direction, + }, + ))), + Poll::Pending => continue 'outer, + }, + HandshakeState::SinkReady => { + match pinned.start_send((*inner.handshake.read()).clone().into()) { + Ok(()) => { + *state = HandshakeState::HandshakeSent; + continue; + }, + Err(_) => + return Poll::Ready(Some(( + *peer, + HandshakeEvent::NegotiationError { + peer: *peer, + direction: *direction, + }, + ))), + } + }, + HandshakeState::HandshakeSent => match pinned.poll_flush(cx) { + Poll::Ready(Ok(())) => match direction { + Direction::Outbound => { + *state = HandshakeState::ReadHandshake; + continue; + }, + Direction::Inbound => { + inner.ready.push_back((*peer, *direction, vec![])); + continue 'outer; + }, + }, + Poll::Ready(Err(_)) => + return Poll::Ready(Some(( + *peer, + HandshakeEvent::NegotiationError { + peer: *peer, + direction: *direction, + }, + ))), + Poll::Pending => continue 'outer, + }, + HandshakeState::ReadHandshake => match pinned.poll_next(cx) { + Poll::Ready(Some(Ok(handshake))) => { + inner.ready.push_back((*peer, *direction, handshake.freeze().into())); + continue 'outer; + }, + Poll::Ready(Some(Err(_))) | Poll::Ready(None) => { + return Poll::Ready(Some(( + *peer, + HandshakeEvent::NegotiationError { + peer: *peer, + direction: *direction, + }, + ))); + }, + Poll::Pending => continue 'outer, + }, + } + } + } + + if let Some((peer, direction, handshake)) = inner.ready.pop_front() { + let (substream, _, _) = + inner.substreams.remove(&(peer, direction)).expect("peer to exist"); + + return Poll::Ready(Some(( + peer, + HandshakeEvent::Negotiated { peer, handshake, substream, direction }, + ))); + } + + Poll::Pending + } } #[cfg(test)] mod tests { - use super::*; - use crate::{ - mock::substream::{DummySubstream, MockSubstream}, - types::SubstreamId, - }; - use futures::StreamExt; - - #[tokio::test] - async fn substream_error_when_sending_handshake() { - let mut service = HandshakeService::new(Arc::new(RwLock::new(vec![1, 2, 3, 4]))); - - futures::future::poll_fn(|cx| match service.poll_next_unpin(cx) { - Poll::Pending => Poll::Ready(()), - _ => panic!("invalid event received"), - }) - .await; - - let mut substream = MockSubstream::new(); - substream.expect_poll_ready().times(1).return_once(|_| Poll::Ready(Ok(()))); - substream - .expect_start_send() - .times(1) - .return_once(|_| Err(crate::error::SubstreamError::ConnectionClosed)); - - let peer = PeerId::random(); - let substream = Substream::new_mock(peer, SubstreamId::from(0usize), Box::new(substream)); - - service.send_handshake(peer, substream); - match service.next().await { - Some(( - failed_peer, - HandshakeEvent::NegotiationError { - peer: event_peer, - direction, - }, - )) => { - assert_eq!(failed_peer, peer); - assert_eq!(event_peer, peer); - assert_eq!(direction, Direction::Inbound); - } - _ => panic!("invalid event received"), - } - } - - #[tokio::test] - async fn substream_error_when_flushing_substream() { - let mut service = HandshakeService::new(Arc::new(RwLock::new(vec![1, 2, 3, 4]))); - - futures::future::poll_fn(|cx| match service.poll_next_unpin(cx) { - Poll::Pending => Poll::Ready(()), - _ => panic!("invalid event received"), - }) - .await; - - let mut substream = MockSubstream::new(); - substream.expect_poll_ready().times(1).return_once(|_| Poll::Ready(Ok(()))); - substream.expect_start_send().times(1).return_once(|_| Ok(())); - substream - .expect_poll_flush() - .times(1) - .return_once(|_| Poll::Ready(Err(crate::error::SubstreamError::ConnectionClosed))); - - let peer = PeerId::random(); - let substream = Substream::new_mock(peer, SubstreamId::from(0usize), Box::new(substream)); - - service.send_handshake(peer, substream); - match service.next().await { - Some(( - failed_peer, - HandshakeEvent::NegotiationError { - peer: event_peer, - direction, - }, - )) => { - assert_eq!(failed_peer, peer); - assert_eq!(event_peer, peer); - assert_eq!(direction, Direction::Inbound); - } - _ => panic!("invalid event received"), - } - } - - // inbound substream is negotiated and it pushed into `inner` but outbound substream fails to - // negotiate - #[tokio::test] - async fn pop_event_but_substream_doesnt_exist() { - let mut service = HandshakeService::new(Arc::new(RwLock::new(vec![1, 2, 3, 4]))); - let peer = PeerId::random(); - - // inbound substream has finished - service.ready.push_front((peer, Direction::Inbound, vec![])); - service.substreams.insert( - (peer, Direction::Inbound), - ( - Substream::new_mock( - peer, - SubstreamId::from(1337usize), - Box::new(DummySubstream::new()), - ), - Delay::new(NEGOTIATION_TIMEOUT), - HandshakeState::HandshakeSent, - ), - ); - service.substreams.insert( - (peer, Direction::Outbound), - ( - Substream::new_mock( - peer, - SubstreamId::from(1337usize), - Box::new(DummySubstream::new()), - ), - Delay::new(NEGOTIATION_TIMEOUT), - HandshakeState::SendHandshake, - ), - ); - - // outbound substream failed and `NotificationProtocol` removes - // both substreams from `HandshakeService` - assert!(service.remove_outbound(&peer).is_some()); - assert!(service.remove_inbound(&peer).is_some()); - - futures::future::poll_fn(|cx| match service.poll_next_unpin(cx) { - Poll::Pending => Poll::Ready(()), - _ => panic!("invalid event received"), - }) - .await - } + use super::*; + use crate::{ + mock::substream::{DummySubstream, MockSubstream}, + types::SubstreamId, + }; + use futures::StreamExt; + + #[tokio::test] + async fn substream_error_when_sending_handshake() { + let mut service = HandshakeService::new(Arc::new(RwLock::new(vec![1, 2, 3, 4]))); + + futures::future::poll_fn(|cx| match service.poll_next_unpin(cx) { + Poll::Pending => Poll::Ready(()), + _ => panic!("invalid event received"), + }) + .await; + + let mut substream = MockSubstream::new(); + substream.expect_poll_ready().times(1).return_once(|_| Poll::Ready(Ok(()))); + substream + .expect_start_send() + .times(1) + .return_once(|_| Err(crate::error::SubstreamError::ConnectionClosed)); + + let peer = PeerId::random(); + let substream = Substream::new_mock(peer, SubstreamId::from(0usize), Box::new(substream)); + + service.send_handshake(peer, substream); + match service.next().await { + Some(( + failed_peer, + HandshakeEvent::NegotiationError { peer: event_peer, direction }, + )) => { + assert_eq!(failed_peer, peer); + assert_eq!(event_peer, peer); + assert_eq!(direction, Direction::Inbound); + }, + _ => panic!("invalid event received"), + } + } + + #[tokio::test] + async fn substream_error_when_flushing_substream() { + let mut service = HandshakeService::new(Arc::new(RwLock::new(vec![1, 2, 3, 4]))); + + futures::future::poll_fn(|cx| match service.poll_next_unpin(cx) { + Poll::Pending => Poll::Ready(()), + _ => panic!("invalid event received"), + }) + .await; + + let mut substream = MockSubstream::new(); + substream.expect_poll_ready().times(1).return_once(|_| Poll::Ready(Ok(()))); + substream.expect_start_send().times(1).return_once(|_| Ok(())); + substream + .expect_poll_flush() + .times(1) + .return_once(|_| Poll::Ready(Err(crate::error::SubstreamError::ConnectionClosed))); + + let peer = PeerId::random(); + let substream = Substream::new_mock(peer, SubstreamId::from(0usize), Box::new(substream)); + + service.send_handshake(peer, substream); + match service.next().await { + Some(( + failed_peer, + HandshakeEvent::NegotiationError { peer: event_peer, direction }, + )) => { + assert_eq!(failed_peer, peer); + assert_eq!(event_peer, peer); + assert_eq!(direction, Direction::Inbound); + }, + _ => panic!("invalid event received"), + } + } + + // inbound substream is negotiated and it pushed into `inner` but outbound substream fails to + // negotiate + #[tokio::test] + async fn pop_event_but_substream_doesnt_exist() { + let mut service = HandshakeService::new(Arc::new(RwLock::new(vec![1, 2, 3, 4]))); + let peer = PeerId::random(); + + // inbound substream has finished + service.ready.push_front((peer, Direction::Inbound, vec![])); + service.substreams.insert( + (peer, Direction::Inbound), + ( + Substream::new_mock( + peer, + SubstreamId::from(1337usize), + Box::new(DummySubstream::new()), + ), + Delay::new(NEGOTIATION_TIMEOUT), + HandshakeState::HandshakeSent, + ), + ); + service.substreams.insert( + (peer, Direction::Outbound), + ( + Substream::new_mock( + peer, + SubstreamId::from(1337usize), + Box::new(DummySubstream::new()), + ), + Delay::new(NEGOTIATION_TIMEOUT), + HandshakeState::SendHandshake, + ), + ); + + // outbound substream failed and `NotificationProtocol` removes + // both substreams from `HandshakeService` + assert!(service.remove_outbound(&peer).is_some()); + assert!(service.remove_inbound(&peer).is_some()); + + futures::future::poll_fn(|cx| match service.poll_next_unpin(cx) { + Poll::Pending => Poll::Ready(()), + _ => panic!("invalid event received"), + }) + .await + } } diff --git a/client/litep2p/src/protocol/notification/tests/mod.rs b/client/litep2p/src/protocol/notification/tests/mod.rs index 1775d9b7..ed2b54b0 100644 --- a/client/litep2p/src/protocol/notification/tests/mod.rs +++ b/client/litep2p/src/protocol/notification/tests/mod.rs @@ -19,19 +19,19 @@ // DEALINGS IN THE SOFTWARE. use crate::{ - executor::DefaultExecutor, - protocol::{ - notification::{ - handle::NotificationHandle, Config as NotificationConfig, NotificationProtocol, - }, - InnerTransportEvent, ProtocolCommand, SubstreamKeepAlive, TransportService, - }, - transport::{ - manager::{TransportManager, TransportManagerBuilder}, - KEEP_ALIVE_TIMEOUT, - }, - types::protocol::ProtocolName, - PeerId, + executor::DefaultExecutor, + protocol::{ + notification::{ + handle::NotificationHandle, Config as NotificationConfig, NotificationProtocol, + }, + InnerTransportEvent, ProtocolCommand, SubstreamKeepAlive, TransportService, + }, + transport::{ + manager::{TransportManager, TransportManagerBuilder}, + KEEP_ALIVE_TIMEOUT, + }, + types::protocol::ProtocolName, + PeerId, }; use tokio::sync::mpsc::{channel, Receiver, Sender}; @@ -42,50 +42,46 @@ mod notification; mod substream_validation; /// create new `NotificationProtocol` -fn make_notification_protocol() -> ( - NotificationProtocol, - NotificationHandle, - TransportManager, - Sender, -) { - let manager = TransportManagerBuilder::new().build(); +fn make_notification_protocol( +) -> (NotificationProtocol, NotificationHandle, TransportManager, Sender) { + let manager = TransportManagerBuilder::new().build(); - let peer = PeerId::random(); - let (transport_service, tx) = TransportService::new( - peer, - ProtocolName::from("/notif/1"), - Vec::new(), - std::sync::Arc::new(Default::default()), - manager.transport_manager_handle(), - KEEP_ALIVE_TIMEOUT, - SubstreamKeepAlive::Yes, - ); - let (config, handle) = NotificationConfig::new( - ProtocolName::from("/notif/1"), - 1024usize, - vec![1, 2, 3, 4], - Vec::new(), - false, - 64, - 64, - true, - ); + let peer = PeerId::random(); + let (transport_service, tx) = TransportService::new( + peer, + ProtocolName::from("/notif/1"), + Vec::new(), + std::sync::Arc::new(Default::default()), + manager.transport_manager_handle(), + KEEP_ALIVE_TIMEOUT, + SubstreamKeepAlive::Yes, + ); + let (config, handle) = NotificationConfig::new( + ProtocolName::from("/notif/1"), + 1024usize, + vec![1, 2, 3, 4], + Vec::new(), + false, + 64, + 64, + true, + ); - ( - NotificationProtocol::new( - transport_service, - config, - std::sync::Arc::new(DefaultExecutor {}), - ), - handle, - manager, - tx, - ) + ( + NotificationProtocol::new( + transport_service, + config, + std::sync::Arc::new(DefaultExecutor {}), + ), + handle, + manager, + tx, + ) } /// add new peer to `NotificationProtocol` fn add_peer() -> (PeerId, (), Receiver) { - let (_tx, rx) = channel(64); + let (_tx, rx) = channel(64); - (PeerId::random(), (), rx) + (PeerId::random(), (), rx) } diff --git a/client/litep2p/src/protocol/notification/tests/notification.rs b/client/litep2p/src/protocol/notification/tests/notification.rs index 25c30c16..1723d01c 100644 --- a/client/litep2p/src/protocol/notification/tests/notification.rs +++ b/client/litep2p/src/protocol/notification/tests/notification.rs @@ -19,778 +19,749 @@ // DEALINGS IN THE SOFTWARE. use crate::{ - mock::substream::{DummySubstream, MockSubstream}, - protocol::{ - self, - connection::ConnectionHandle, - notification::{ - negotiation::HandshakeEvent, - tests::make_notification_protocol, - types::{Direction, NotificationError, NotificationEvent}, - ConnectionState, InboundState, NotificationProtocol, OutboundState, PeerContext, - PeerState, ValidationResult, - }, - InnerTransportEvent, Permit, ProtocolCommand, SubstreamError, - }, - substream::Substream, - transport::Endpoint, - types::{protocol::ProtocolName, ConnectionId, SubstreamId}, - PeerId, + mock::substream::{DummySubstream, MockSubstream}, + protocol::{ + self, + connection::ConnectionHandle, + notification::{ + negotiation::HandshakeEvent, + tests::make_notification_protocol, + types::{Direction, NotificationError, NotificationEvent}, + ConnectionState, InboundState, NotificationProtocol, OutboundState, PeerContext, + PeerState, ValidationResult, + }, + InnerTransportEvent, Permit, ProtocolCommand, SubstreamError, + }, + substream::Substream, + transport::Endpoint, + types::{protocol::ProtocolName, ConnectionId, SubstreamId}, + PeerId, }; use futures::StreamExt; use multiaddr::Multiaddr; use tokio::sync::{ - mpsc::{channel, Receiver, Sender}, - oneshot, + mpsc::{channel, Receiver, Sender}, + oneshot, }; use std::{task::Poll, time::Duration}; fn next_inbound_state(state: usize) -> InboundState { - match state { - 0 => InboundState::Closed, - 1 => InboundState::ReadingHandshake, - 2 => InboundState::Validating { - inbound: Substream::new_mock( - PeerId::random(), - SubstreamId::from(0usize), - Box::new(MockSubstream::new()), - ), - }, - 3 => InboundState::SendingHandshake, - 4 => InboundState::Open { - inbound: Substream::new_mock( - PeerId::random(), - SubstreamId::from(0usize), - Box::new(MockSubstream::new()), - ), - }, - _ => panic!(), - } + match state { + 0 => InboundState::Closed, + 1 => InboundState::ReadingHandshake, + 2 => InboundState::Validating { + inbound: Substream::new_mock( + PeerId::random(), + SubstreamId::from(0usize), + Box::new(MockSubstream::new()), + ), + }, + 3 => InboundState::SendingHandshake, + 4 => InboundState::Open { + inbound: Substream::new_mock( + PeerId::random(), + SubstreamId::from(0usize), + Box::new(MockSubstream::new()), + ), + }, + _ => panic!(), + } } fn next_outbound_state(state: usize) -> OutboundState { - match state { - 0 => OutboundState::Closed, - 1 => OutboundState::OutboundInitiated { - substream: SubstreamId::new(), - }, - 2 => OutboundState::Negotiating, - 3 => OutboundState::Open { - handshake: vec![1, 3, 3, 7], - outbound: Substream::new_mock( - PeerId::random(), - SubstreamId::from(0usize), - Box::new(MockSubstream::new()), - ), - }, - _ => panic!(), - } + match state { + 0 => OutboundState::Closed, + 1 => OutboundState::OutboundInitiated { substream: SubstreamId::new() }, + 2 => OutboundState::Negotiating, + 3 => OutboundState::Open { + handshake: vec![1, 3, 3, 7], + outbound: Substream::new_mock( + PeerId::random(), + SubstreamId::from(0usize), + Box::new(MockSubstream::new()), + ), + }, + _ => panic!(), + } } #[tokio::test] async fn connection_closed_for_outbound_open_substream() { - let peer = PeerId::random(); - - for i in 0..5 { - connection_closed( - peer, - PeerState::Validating { - direction: Direction::Inbound, - protocol: ProtocolName::from("/notif/1"), - fallback: None, - outbound: OutboundState::Open { - handshake: vec![1, 2, 3, 4], - outbound: Substream::new_mock( - PeerId::random(), - SubstreamId::from(0usize), - Box::new(MockSubstream::new()), - ), - }, - inbound: next_inbound_state(i), - }, - Some(NotificationEvent::NotificationStreamOpenFailure { - peer, - error: NotificationError::Rejected, - }), - ) - .await; - } + let peer = PeerId::random(); + + for i in 0..5 { + connection_closed( + peer, + PeerState::Validating { + direction: Direction::Inbound, + protocol: ProtocolName::from("/notif/1"), + fallback: None, + outbound: OutboundState::Open { + handshake: vec![1, 2, 3, 4], + outbound: Substream::new_mock( + PeerId::random(), + SubstreamId::from(0usize), + Box::new(MockSubstream::new()), + ), + }, + inbound: next_inbound_state(i), + }, + Some(NotificationEvent::NotificationStreamOpenFailure { + peer, + error: NotificationError::Rejected, + }), + ) + .await; + } } #[tokio::test] async fn connection_closed_for_outbound_initiated_substream() { - let peer = PeerId::random(); - - for i in 0..5 { - connection_closed( - peer, - PeerState::Validating { - direction: Direction::Inbound, - protocol: ProtocolName::from("/notif/1"), - fallback: None, - outbound: OutboundState::OutboundInitiated { - substream: SubstreamId::from(0usize), - }, - inbound: next_inbound_state(i), - }, - Some(NotificationEvent::NotificationStreamOpenFailure { - peer, - error: NotificationError::Rejected, - }), - ) - .await; - } + let peer = PeerId::random(); + + for i in 0..5 { + connection_closed( + peer, + PeerState::Validating { + direction: Direction::Inbound, + protocol: ProtocolName::from("/notif/1"), + fallback: None, + outbound: OutboundState::OutboundInitiated { substream: SubstreamId::from(0usize) }, + inbound: next_inbound_state(i), + }, + Some(NotificationEvent::NotificationStreamOpenFailure { + peer, + error: NotificationError::Rejected, + }), + ) + .await; + } } #[tokio::test] async fn connection_closed_for_outbound_negotiated_substream() { - let peer = PeerId::random(); - - for i in 0..5 { - connection_closed( - peer, - PeerState::Validating { - direction: Direction::Inbound, - protocol: ProtocolName::from("/notif/1"), - fallback: None, - outbound: OutboundState::Negotiating, - inbound: next_inbound_state(i), - }, - Some(NotificationEvent::NotificationStreamOpenFailure { - peer, - error: NotificationError::Rejected, - }), - ) - .await; - } + let peer = PeerId::random(); + + for i in 0..5 { + connection_closed( + peer, + PeerState::Validating { + direction: Direction::Inbound, + protocol: ProtocolName::from("/notif/1"), + fallback: None, + outbound: OutboundState::Negotiating, + inbound: next_inbound_state(i), + }, + Some(NotificationEvent::NotificationStreamOpenFailure { + peer, + error: NotificationError::Rejected, + }), + ) + .await; + } } #[tokio::test] async fn connection_closed_for_initiated_substream() { - let peer = PeerId::random(); - - connection_closed( - peer, - PeerState::OutboundInitiated { - substream: SubstreamId::new(), - }, - Some(NotificationEvent::NotificationStreamOpenFailure { - peer, - error: NotificationError::Rejected, - }), - ) - .await; + let peer = PeerId::random(); + + connection_closed( + peer, + PeerState::OutboundInitiated { substream: SubstreamId::new() }, + Some(NotificationEvent::NotificationStreamOpenFailure { + peer, + error: NotificationError::Rejected, + }), + ) + .await; } #[tokio::test] #[cfg(debug_assertions)] #[should_panic] async fn connection_established_twice() { - let _ = tracing_subscriber::fmt() - .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) - .try_init(); + let _ = tracing_subscriber::fmt() + .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) + .try_init(); - let (mut notif, _handle, _sender, _tx) = make_notification_protocol(); - let peer = PeerId::random(); + let (mut notif, _handle, _sender, _tx) = make_notification_protocol(); + let peer = PeerId::random(); - assert!(notif.on_connection_established(peer).await.is_ok()); - assert!(notif.on_connection_established(peer).await.is_err()); + assert!(notif.on_connection_established(peer).await.is_ok()); + assert!(notif.on_connection_established(peer).await.is_err()); } #[tokio::test] #[cfg(debug_assertions)] #[should_panic] async fn connection_closed_twice() { - let _ = tracing_subscriber::fmt() - .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) - .try_init(); + let _ = tracing_subscriber::fmt() + .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) + .try_init(); - let (mut notif, _handle, _sender, _tx) = make_notification_protocol(); - let peer = PeerId::random(); + let (mut notif, _handle, _sender, _tx) = make_notification_protocol(); + let peer = PeerId::random(); - assert!(notif.on_connection_closed(peer).await.is_ok()); - assert!(notif.on_connection_closed(peer).await.is_err()); + assert!(notif.on_connection_closed(peer).await.is_ok()); + assert!(notif.on_connection_closed(peer).await.is_err()); } #[tokio::test] #[cfg(debug_assertions)] #[should_panic] async fn substream_open_failure_for_unknown_substream() { - let _ = tracing_subscriber::fmt() - .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) - .try_init(); + let _ = tracing_subscriber::fmt() + .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) + .try_init(); - let (mut notif, _handle, _sender, _tx) = make_notification_protocol(); + let (mut notif, _handle, _sender, _tx) = make_notification_protocol(); - notif - .on_substream_open_failure(SubstreamId::new(), SubstreamError::ConnectionClosed) - .await; + notif + .on_substream_open_failure(SubstreamId::new(), SubstreamError::ConnectionClosed) + .await; } #[tokio::test] async fn close_substream_to_unknown_peer() { - let _ = tracing_subscriber::fmt() - .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) - .try_init(); + let _ = tracing_subscriber::fmt() + .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) + .try_init(); - let (mut notif, _handle, _sender, _tx) = make_notification_protocol(); - let peer = PeerId::random(); + let (mut notif, _handle, _sender, _tx) = make_notification_protocol(); + let peer = PeerId::random(); - assert!(!notif.peers.contains_key(&peer)); - notif.on_close_substream(peer).await; - assert!(!notif.peers.contains_key(&peer)); + assert!(!notif.peers.contains_key(&peer)); + notif.on_close_substream(peer).await; + assert!(!notif.peers.contains_key(&peer)); } #[tokio::test] #[cfg(debug_assertions)] #[should_panic] async fn handshake_event_unknown_peer() { - let _ = tracing_subscriber::fmt() - .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) - .try_init(); - - let (mut notif, _handle, _sender, _tx) = make_notification_protocol(); - let peer = PeerId::random(); - - assert!(!notif.peers.contains_key(&peer)); - notif - .on_handshake_event( - peer, - HandshakeEvent::Negotiated { - peer, - handshake: vec![1, 3, 3, 7], - substream: Substream::new_mock( - peer, - SubstreamId::from(0usize), - Box::new(DummySubstream::new()), - ), - direction: protocol::notification::negotiation::Direction::Inbound, - }, - ) - .await; - assert!(!notif.peers.contains_key(&peer)); + let _ = tracing_subscriber::fmt() + .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) + .try_init(); + + let (mut notif, _handle, _sender, _tx) = make_notification_protocol(); + let peer = PeerId::random(); + + assert!(!notif.peers.contains_key(&peer)); + notif + .on_handshake_event( + peer, + HandshakeEvent::Negotiated { + peer, + handshake: vec![1, 3, 3, 7], + substream: Substream::new_mock( + peer, + SubstreamId::from(0usize), + Box::new(DummySubstream::new()), + ), + direction: protocol::notification::negotiation::Direction::Inbound, + }, + ) + .await; + assert!(!notif.peers.contains_key(&peer)); } #[tokio::test] #[cfg(debug_assertions)] #[should_panic] async fn handshake_event_invalid_state_for_outbound_substream() { - let _ = tracing_subscriber::fmt() - .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) - .try_init(); - - let (mut notif, _handle, _sender, mut tx) = make_notification_protocol(); - let (peer, _receiver, _permit) = register_peer(&mut notif, &mut tx).await; - - notif - .on_handshake_event( - peer, - HandshakeEvent::Negotiated { - peer, - handshake: vec![1, 3, 3, 7], - substream: Substream::new_mock( - peer, - SubstreamId::from(0usize), - Box::new(DummySubstream::new()), - ), - direction: protocol::notification::negotiation::Direction::Outbound, - }, - ) - .await; + let _ = tracing_subscriber::fmt() + .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) + .try_init(); + + let (mut notif, _handle, _sender, mut tx) = make_notification_protocol(); + let (peer, _receiver, _permit) = register_peer(&mut notif, &mut tx).await; + + notif + .on_handshake_event( + peer, + HandshakeEvent::Negotiated { + peer, + handshake: vec![1, 3, 3, 7], + substream: Substream::new_mock( + peer, + SubstreamId::from(0usize), + Box::new(DummySubstream::new()), + ), + direction: protocol::notification::negotiation::Direction::Outbound, + }, + ) + .await; } #[tokio::test] #[cfg(debug_assertions)] #[should_panic] async fn substream_open_failure_for_unknown_peer() { - let _ = tracing_subscriber::fmt() - .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) - .try_init(); - - let (mut notif, _handle, _sender, _tx) = make_notification_protocol(); - let peer = PeerId::random(); - let substream_id = SubstreamId::from(1337usize); - - notif.pending_outbound.insert(substream_id, peer); - notif - .on_substream_open_failure(substream_id, SubstreamError::ConnectionClosed) - .await; + let _ = tracing_subscriber::fmt() + .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) + .try_init(); + + let (mut notif, _handle, _sender, _tx) = make_notification_protocol(); + let peer = PeerId::random(); + let substream_id = SubstreamId::from(1337usize); + + notif.pending_outbound.insert(substream_id, peer); + notif + .on_substream_open_failure(substream_id, SubstreamError::ConnectionClosed) + .await; } #[tokio::test] async fn dial_failure_for_non_dialing_peer() { - let (mut notif, mut handle, _sender, mut tx) = make_notification_protocol(); - let (peer, _receiver, _permit) = register_peer(&mut notif, &mut tx).await; - - // dial failure for the peer even though it's not dialing - notif.on_dial_failure(peer, vec![]).await; - - assert!(std::matches!( - notif.peers.get(&peer), - Some(PeerContext { - state: PeerState::Closed { .. } - }) - )); - futures::future::poll_fn(|cx| match handle.poll_next_unpin(cx) { - Poll::Pending => Poll::Ready(()), - _ => panic!("invalid event"), - }) - .await; + let (mut notif, mut handle, _sender, mut tx) = make_notification_protocol(); + let (peer, _receiver, _permit) = register_peer(&mut notif, &mut tx).await; + + // dial failure for the peer even though it's not dialing + notif.on_dial_failure(peer, vec![]).await; + + assert!(std::matches!( + notif.peers.get(&peer), + Some(PeerContext { state: PeerState::Closed { .. } }) + )); + futures::future::poll_fn(|cx| match handle.poll_next_unpin(cx) { + Poll::Pending => Poll::Ready(()), + _ => panic!("invalid event"), + }) + .await; } // inbound state is ignored async fn connection_closed(peer: PeerId, state: PeerState, event: Option) { - let _ = tracing_subscriber::fmt() - .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) - .try_init(); + let _ = tracing_subscriber::fmt() + .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) + .try_init(); - let (mut notif, mut handle, _sender, _tx) = make_notification_protocol(); + let (mut notif, mut handle, _sender, _tx) = make_notification_protocol(); - notif.peers.insert(peer, PeerContext { state }); - notif.on_connection_closed(peer).await.unwrap(); + notif.peers.insert(peer, PeerContext { state }); + notif.on_connection_closed(peer).await.unwrap(); - if let Some(expected) = event { - assert_eq!(handle.next().await.unwrap(), expected); - } - assert!(!notif.peers.contains_key(&peer)) + if let Some(expected) = event { + assert_eq!(handle.next().await.unwrap(), expected); + } + assert!(!notif.peers.contains_key(&peer)) } // register new connection to `NotificationProtocol` async fn register_peer( - notif: &mut NotificationProtocol, - sender: &mut Sender, + notif: &mut NotificationProtocol, + sender: &mut Sender, ) -> (PeerId, Receiver, Permit) { - let peer = PeerId::random(); - let (conn_tx, conn_rx) = channel(64); - let permit = Permit::new(conn_tx.clone()); - - sender - .send(InnerTransportEvent::ConnectionEstablished { - peer, - connection: ConnectionId::new(), - endpoint: Endpoint::dialer(Multiaddr::empty(), ConnectionId::from(0usize)), - sender: ConnectionHandle::new(ConnectionId::from(0usize), conn_tx), - }) - .await - .unwrap(); - - // poll the protocol to register the peer - notif.next_event().await; - - assert!(std::matches!( - notif.peers.get(&peer), - Some(PeerContext { - state: PeerState::Closed { .. } - }) - )); - - (peer, conn_rx, permit) + let peer = PeerId::random(); + let (conn_tx, conn_rx) = channel(64); + let permit = Permit::new(conn_tx.clone()); + + sender + .send(InnerTransportEvent::ConnectionEstablished { + peer, + connection: ConnectionId::new(), + endpoint: Endpoint::dialer(Multiaddr::empty(), ConnectionId::from(0usize)), + sender: ConnectionHandle::new(ConnectionId::from(0usize), conn_tx), + }) + .await + .unwrap(); + + // poll the protocol to register the peer + notif.next_event().await; + + assert!(std::matches!( + notif.peers.get(&peer), + Some(PeerContext { state: PeerState::Closed { .. } }) + )); + + (peer, conn_rx, permit) } #[tokio::test] async fn open_substream_connection_closed() { - open_substream(PeerState::Closed { pending_open: None }, true).await; + open_substream(PeerState::Closed { pending_open: None }, true).await; } #[tokio::test] async fn open_substream_already_initiated() { - open_substream( - PeerState::OutboundInitiated { - substream: SubstreamId::new(), - }, - false, - ) - .await; + open_substream(PeerState::OutboundInitiated { substream: SubstreamId::new() }, false).await; } #[tokio::test] async fn open_substream_already_open() { - let (shutdown, _rx) = oneshot::channel(); - open_substream(PeerState::Open { shutdown }, false).await; + let (shutdown, _rx) = oneshot::channel(); + open_substream(PeerState::Open { shutdown }, false).await; } #[tokio::test] async fn open_substream_under_validation() { - for i in 0..5 { - for k in 0..4 { - open_substream( - PeerState::Validating { - direction: Direction::Inbound, - protocol: ProtocolName::from("/notif/1"), - fallback: None, - outbound: next_outbound_state(k), - inbound: next_inbound_state(i), - }, - false, - ) - .await; - } - } + for i in 0..5 { + for k in 0..4 { + open_substream( + PeerState::Validating { + direction: Direction::Inbound, + protocol: ProtocolName::from("/notif/1"), + fallback: None, + outbound: next_outbound_state(k), + inbound: next_inbound_state(i), + }, + false, + ) + .await; + } + } } async fn open_substream(state: PeerState, succeeds: bool) { - let _ = tracing_subscriber::fmt() - .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) - .try_init(); + let _ = tracing_subscriber::fmt() + .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) + .try_init(); - let (mut notif, _handle, _sender, mut tx) = make_notification_protocol(); - let (peer, mut receiver, _permit) = register_peer(&mut notif, &mut tx).await; + let (mut notif, _handle, _sender, mut tx) = make_notification_protocol(); + let (peer, mut receiver, _permit) = register_peer(&mut notif, &mut tx).await; - let context = notif.peers.get_mut(&peer).unwrap(); - context.state = state; + let context = notif.peers.get_mut(&peer).unwrap(); + context.state = state; - notif.on_open_substream(peer).await.unwrap(); - assert!(receiver.try_recv().is_ok() == succeeds); + notif.on_open_substream(peer).await.unwrap(); + assert!(receiver.try_recv().is_ok() == succeeds); } #[tokio::test] async fn open_substream_no_connection() { - let _ = tracing_subscriber::fmt() - .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) - .try_init(); + let _ = tracing_subscriber::fmt() + .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) + .try_init(); - let (mut notif, _handle, _sender, _tx) = make_notification_protocol(); - assert!(notif.on_open_substream(PeerId::random()).await.is_err()); + let (mut notif, _handle, _sender, _tx) = make_notification_protocol(); + assert!(notif.on_open_substream(PeerId::random()).await.is_err()); } #[tokio::test] async fn remote_opens_multiple_inbound_substreams() { - let _ = tracing_subscriber::fmt() - .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) - .try_init(); - - let protocol = ProtocolName::from("/notif/1"); - let (mut notif, _handle, _sender, mut tx) = make_notification_protocol(); - let (peer, _receiver, permit) = register_peer(&mut notif, &mut tx).await; - - // open substream, poll the result and verify that the peer is in correct state - tx.send(InnerTransportEvent::SubstreamOpened { - peer, - protocol: protocol.clone(), - fallback: None, - direction: protocol::Direction::Inbound, - substream: Substream::new_mock( - PeerId::random(), - SubstreamId::from(0usize), - Box::new(DummySubstream::new()), - ), - connection_id: ConnectionId::from(0usize), - opening_permit: permit.clone(), - }) - .await - .unwrap(); - notif.next_event().await; - - match notif.peers.get(&peer) { - Some(PeerContext { - state: - PeerState::Validating { - direction: Direction::Inbound, - protocol, - fallback: None, - outbound: OutboundState::Closed, - inbound: InboundState::ReadingHandshake, - }, - }) => { - assert_eq!(protocol, &ProtocolName::from("/notif/1")); - } - state => panic!("invalid state: {state:?}"), - } - - // try to open another substream and verify it's discarded and the state is otherwise - // preserved - let mut substream = MockSubstream::new(); - substream.expect_poll_close().times(1).return_once(|_| Poll::Ready(Ok(()))); - - tx.send(InnerTransportEvent::SubstreamOpened { - peer, - protocol: protocol.clone(), - fallback: None, - direction: protocol::Direction::Inbound, - substream: Substream::new_mock( - PeerId::random(), - SubstreamId::from(0usize), - Box::new(substream), - ), - connection_id: ConnectionId::from(0usize), - opening_permit: permit, - }) - .await - .unwrap(); - notif.next_event().await; - - match notif.peers.get(&peer) { - Some(PeerContext { - state: - PeerState::Validating { - direction: Direction::Inbound, - protocol, - fallback: None, - outbound: OutboundState::Closed, - inbound: InboundState::ReadingHandshake, - }, - }) => { - assert_eq!(protocol, &ProtocolName::from("/notif/1")); - } - state => panic!("invalid state: {state:?}"), - } + let _ = tracing_subscriber::fmt() + .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) + .try_init(); + + let protocol = ProtocolName::from("/notif/1"); + let (mut notif, _handle, _sender, mut tx) = make_notification_protocol(); + let (peer, _receiver, permit) = register_peer(&mut notif, &mut tx).await; + + // open substream, poll the result and verify that the peer is in correct state + tx.send(InnerTransportEvent::SubstreamOpened { + peer, + protocol: protocol.clone(), + fallback: None, + direction: protocol::Direction::Inbound, + substream: Substream::new_mock( + PeerId::random(), + SubstreamId::from(0usize), + Box::new(DummySubstream::new()), + ), + connection_id: ConnectionId::from(0usize), + opening_permit: permit.clone(), + }) + .await + .unwrap(); + notif.next_event().await; + + match notif.peers.get(&peer) { + Some(PeerContext { + state: + PeerState::Validating { + direction: Direction::Inbound, + protocol, + fallback: None, + outbound: OutboundState::Closed, + inbound: InboundState::ReadingHandshake, + }, + }) => { + assert_eq!(protocol, &ProtocolName::from("/notif/1")); + }, + state => panic!("invalid state: {state:?}"), + } + + // try to open another substream and verify it's discarded and the state is otherwise + // preserved + let mut substream = MockSubstream::new(); + substream.expect_poll_close().times(1).return_once(|_| Poll::Ready(Ok(()))); + + tx.send(InnerTransportEvent::SubstreamOpened { + peer, + protocol: protocol.clone(), + fallback: None, + direction: protocol::Direction::Inbound, + substream: Substream::new_mock( + PeerId::random(), + SubstreamId::from(0usize), + Box::new(substream), + ), + connection_id: ConnectionId::from(0usize), + opening_permit: permit, + }) + .await + .unwrap(); + notif.next_event().await; + + match notif.peers.get(&peer) { + Some(PeerContext { + state: + PeerState::Validating { + direction: Direction::Inbound, + protocol, + fallback: None, + outbound: OutboundState::Closed, + inbound: InboundState::ReadingHandshake, + }, + }) => { + assert_eq!(protocol, &ProtocolName::from("/notif/1")); + }, + state => panic!("invalid state: {state:?}"), + } } #[tokio::test] async fn pending_outbound_tracked_correctly() { - let _ = tracing_subscriber::fmt() - .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) - .try_init(); - - let protocol = ProtocolName::from("/notif/1"); - let (mut notif, _handle, _sender, mut tx) = make_notification_protocol(); - let (peer, _receiver, _permit) = register_peer(&mut notif, &mut tx).await; - - // open outbound substream - notif.on_open_substream(peer).await.unwrap(); - - match notif.peers.get(&peer) { - Some(PeerContext { - state: PeerState::OutboundInitiated { substream }, - }) => { - assert_eq!(substream, &SubstreamId::new()); - } - state => panic!("invalid state: {state:?}"), - } - - // then register inbound substream and verify that the state is changed to `Validating` - notif - .on_inbound_substream( - protocol.clone(), - None, - peer, - Substream::new_mock( - PeerId::random(), - SubstreamId::from(0usize), - Box::new(DummySubstream::new()), - ), - ) - .await - .unwrap(); - - match notif.peers.get(&peer) { - Some(PeerContext { - state: - PeerState::Validating { - direction: Direction::Outbound, - outbound: OutboundState::OutboundInitiated { .. }, - inbound: InboundState::ReadingHandshake, - .. - }, - }) => {} - state => panic!("invalid state: {state:?}"), - } - - // then negotiation event for the inbound handshake - notif - .on_handshake_event( - peer, - HandshakeEvent::Negotiated { - peer, - handshake: vec![1, 3, 3, 7], - substream: Substream::new_mock( - PeerId::random(), - SubstreamId::from(0usize), - Box::new(DummySubstream::new()), - ), - direction: protocol::notification::negotiation::Direction::Inbound, - }, - ) - .await; - - match notif.peers.get(&peer) { - Some(PeerContext { - state: - PeerState::Validating { - direction: Direction::Outbound, - outbound: OutboundState::OutboundInitiated { .. }, - inbound: InboundState::Validating { .. }, - .. - }, - }) => {} - state => panic!("invalid state: {state:?}"), - } - - // then reject the inbound peer even though an outbound substream was already established - notif.on_validation_result(peer, ValidationResult::Reject).await.unwrap(); - - match notif.peers.get(&peer) { - Some(PeerContext { - state: PeerState::Closed { pending_open }, - }) => { - assert_eq!(pending_open, &Some(SubstreamId::new())); - } - state => panic!("invalid state: {state:?}"), - } - - // finally the outbound substream registers, verify that `pending_open` is set to `None` - notif - .on_outbound_substream( - protocol, - None, - peer, - SubstreamId::new(), - Substream::new_mock( - PeerId::random(), - SubstreamId::from(0usize), - Box::new(DummySubstream::new()), - ), - ) - .await - .unwrap(); - - match notif.peers.get(&peer) { - Some(PeerContext { - state: PeerState::Closed { pending_open }, - }) => { - assert!(pending_open.is_none()); - } - state => panic!("invalid state: {state:?}"), - } + let _ = tracing_subscriber::fmt() + .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) + .try_init(); + + let protocol = ProtocolName::from("/notif/1"); + let (mut notif, _handle, _sender, mut tx) = make_notification_protocol(); + let (peer, _receiver, _permit) = register_peer(&mut notif, &mut tx).await; + + // open outbound substream + notif.on_open_substream(peer).await.unwrap(); + + match notif.peers.get(&peer) { + Some(PeerContext { state: PeerState::OutboundInitiated { substream } }) => { + assert_eq!(substream, &SubstreamId::new()); + }, + state => panic!("invalid state: {state:?}"), + } + + // then register inbound substream and verify that the state is changed to `Validating` + notif + .on_inbound_substream( + protocol.clone(), + None, + peer, + Substream::new_mock( + PeerId::random(), + SubstreamId::from(0usize), + Box::new(DummySubstream::new()), + ), + ) + .await + .unwrap(); + + match notif.peers.get(&peer) { + Some(PeerContext { + state: + PeerState::Validating { + direction: Direction::Outbound, + outbound: OutboundState::OutboundInitiated { .. }, + inbound: InboundState::ReadingHandshake, + .. + }, + }) => {}, + state => panic!("invalid state: {state:?}"), + } + + // then negotiation event for the inbound handshake + notif + .on_handshake_event( + peer, + HandshakeEvent::Negotiated { + peer, + handshake: vec![1, 3, 3, 7], + substream: Substream::new_mock( + PeerId::random(), + SubstreamId::from(0usize), + Box::new(DummySubstream::new()), + ), + direction: protocol::notification::negotiation::Direction::Inbound, + }, + ) + .await; + + match notif.peers.get(&peer) { + Some(PeerContext { + state: + PeerState::Validating { + direction: Direction::Outbound, + outbound: OutboundState::OutboundInitiated { .. }, + inbound: InboundState::Validating { .. }, + .. + }, + }) => {}, + state => panic!("invalid state: {state:?}"), + } + + // then reject the inbound peer even though an outbound substream was already established + notif.on_validation_result(peer, ValidationResult::Reject).await.unwrap(); + + match notif.peers.get(&peer) { + Some(PeerContext { state: PeerState::Closed { pending_open } }) => { + assert_eq!(pending_open, &Some(SubstreamId::new())); + }, + state => panic!("invalid state: {state:?}"), + } + + // finally the outbound substream registers, verify that `pending_open` is set to `None` + notif + .on_outbound_substream( + protocol, + None, + peer, + SubstreamId::new(), + Substream::new_mock( + PeerId::random(), + SubstreamId::from(0usize), + Box::new(DummySubstream::new()), + ), + ) + .await + .unwrap(); + + match notif.peers.get(&peer) { + Some(PeerContext { state: PeerState::Closed { pending_open } }) => { + assert!(pending_open.is_none()); + }, + state => panic!("invalid state: {state:?}"), + } } #[tokio::test] async fn inbound_accepted_outbound_fails_to_open() { - let _ = tracing_subscriber::fmt() - .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) - .try_init(); - - let protocol = ProtocolName::from("/notif/1"); - let (mut notif, mut handle, sender, mut tx) = make_notification_protocol(); - let (peer, receiver, _permit) = register_peer(&mut notif, &mut tx).await; - - // register inbound substream and verify that the state is `Validating` - notif - .on_inbound_substream( - protocol.clone(), - None, - peer, - Substream::new_mock( - PeerId::random(), - SubstreamId::from(0usize), - Box::new(DummySubstream::new()), - ), - ) - .await - .unwrap(); - - match notif.peers.get(&peer) { - Some(PeerContext { - state: - PeerState::Validating { - direction: Direction::Inbound, - outbound: OutboundState::Closed, - inbound: InboundState::ReadingHandshake, - .. - }, - }) => {} - state => panic!("invalid state: {state:?}"), - } - - // then negotiation event for the inbound handshake - notif - .on_handshake_event( - peer, - HandshakeEvent::Negotiated { - peer, - handshake: vec![1, 3, 3, 7], - substream: Substream::new_mock( - PeerId::random(), - SubstreamId::from(0usize), - Box::new(DummySubstream::new()), - ), - direction: protocol::notification::negotiation::Direction::Inbound, - }, - ) - .await; - - match notif.peers.get(&peer) { - Some(PeerContext { - state: - PeerState::Validating { - direction: Direction::Inbound, - outbound: OutboundState::Closed, - inbound: InboundState::Validating { .. }, - .. - }, - }) => {} - state => panic!("invalid state: {state:?}"), - } - - // discard the validation event - assert!(tokio::time::timeout(Duration::from_secs(5), handle.next()).await.is_ok()); - - // before the validation event is registered, close the connection - drop(sender); - drop(receiver); - drop(tx); - - // then reject the inbound peer even though an outbound substream was already established - assert!(notif.on_validation_result(peer, ValidationResult::Accept).await.is_err()); - - match notif.peers.get(&peer) { - Some(PeerContext { - state: PeerState::Closed { pending_open }, - }) => { - assert!(pending_open.is_none()); - } - state => panic!("invalid state: {state:?}"), - } - - // verify that the user is not reported anything - match tokio::time::timeout(Duration::from_secs(1), handle.next()).await { - Err(_) => panic!("unexpected timeout"), - Ok(Some(NotificationEvent::NotificationStreamOpenFailure { - peer: event_peer, - error, - })) => { - assert_eq!(peer, event_peer); - assert_eq!(error, NotificationError::Rejected) - } - _ => panic!("invalid event"), - } + let _ = tracing_subscriber::fmt() + .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) + .try_init(); + + let protocol = ProtocolName::from("/notif/1"); + let (mut notif, mut handle, sender, mut tx) = make_notification_protocol(); + let (peer, receiver, _permit) = register_peer(&mut notif, &mut tx).await; + + // register inbound substream and verify that the state is `Validating` + notif + .on_inbound_substream( + protocol.clone(), + None, + peer, + Substream::new_mock( + PeerId::random(), + SubstreamId::from(0usize), + Box::new(DummySubstream::new()), + ), + ) + .await + .unwrap(); + + match notif.peers.get(&peer) { + Some(PeerContext { + state: + PeerState::Validating { + direction: Direction::Inbound, + outbound: OutboundState::Closed, + inbound: InboundState::ReadingHandshake, + .. + }, + }) => {}, + state => panic!("invalid state: {state:?}"), + } + + // then negotiation event for the inbound handshake + notif + .on_handshake_event( + peer, + HandshakeEvent::Negotiated { + peer, + handshake: vec![1, 3, 3, 7], + substream: Substream::new_mock( + PeerId::random(), + SubstreamId::from(0usize), + Box::new(DummySubstream::new()), + ), + direction: protocol::notification::negotiation::Direction::Inbound, + }, + ) + .await; + + match notif.peers.get(&peer) { + Some(PeerContext { + state: + PeerState::Validating { + direction: Direction::Inbound, + outbound: OutboundState::Closed, + inbound: InboundState::Validating { .. }, + .. + }, + }) => {}, + state => panic!("invalid state: {state:?}"), + } + + // discard the validation event + assert!(tokio::time::timeout(Duration::from_secs(5), handle.next()).await.is_ok()); + + // before the validation event is registered, close the connection + drop(sender); + drop(receiver); + drop(tx); + + // then reject the inbound peer even though an outbound substream was already established + assert!(notif.on_validation_result(peer, ValidationResult::Accept).await.is_err()); + + match notif.peers.get(&peer) { + Some(PeerContext { state: PeerState::Closed { pending_open } }) => { + assert!(pending_open.is_none()); + }, + state => panic!("invalid state: {state:?}"), + } + + // verify that the user is not reported anything + match tokio::time::timeout(Duration::from_secs(1), handle.next()).await { + Err(_) => panic!("unexpected timeout"), + Ok(Some(NotificationEvent::NotificationStreamOpenFailure { peer: event_peer, error })) => { + assert_eq!(peer, event_peer); + assert_eq!(error, NotificationError::Rejected) + }, + _ => panic!("invalid event"), + } } #[tokio::test] async fn open_substream_on_closed_connection() { - let _ = tracing_subscriber::fmt() - .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) - .try_init(); - - let (mut notif, mut handle, sender, mut tx) = make_notification_protocol(); - let (peer, receiver, _permit) = register_peer(&mut notif, &mut tx).await; - - // before processing the open substream event, close the connection - drop(sender); - drop(receiver); - drop(tx); - - // open outbound substream - notif.on_open_substream(peer).await.unwrap(); - - match notif.peers.get(&peer) { - Some(PeerContext { - state: PeerState::Closed { pending_open: None }, - }) => {} - state => panic!("invalid state: {state:?}"), - } - - match tokio::time::timeout(Duration::from_secs(5), handle.next()) - .await - .expect("operation to succeed") - { - Some(NotificationEvent::NotificationStreamOpenFailure { error, .. }) => { - assert_eq!(error, NotificationError::NoConnection); - } - event => panic!("invalid event received: {event:?}"), - } + let _ = tracing_subscriber::fmt() + .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) + .try_init(); + + let (mut notif, mut handle, sender, mut tx) = make_notification_protocol(); + let (peer, receiver, _permit) = register_peer(&mut notif, &mut tx).await; + + // before processing the open substream event, close the connection + drop(sender); + drop(receiver); + drop(tx); + + // open outbound substream + notif.on_open_substream(peer).await.unwrap(); + + match notif.peers.get(&peer) { + Some(PeerContext { state: PeerState::Closed { pending_open: None } }) => {}, + state => panic!("invalid state: {state:?}"), + } + + match tokio::time::timeout(Duration::from_secs(5), handle.next()) + .await + .expect("operation to succeed") + { + Some(NotificationEvent::NotificationStreamOpenFailure { error, .. }) => { + assert_eq!(error, NotificationError::NoConnection); + }, + event => panic!("invalid event received: {event:?}"), + } } // `NotificationHandle` may have an inconsistent view of the peer state and connection to peer may @@ -801,69 +772,67 @@ async fn open_substream_on_closed_connection() { // verify that `NotificationProtocol` ignores stale disconnection requests #[tokio::test] async fn close_already_closed_connection() { - let _ = tracing_subscriber::fmt() - .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) - .try_init(); - - let (mut notif, mut handle, _, mut tx) = make_notification_protocol(); - let (peer, _, _permit) = register_peer(&mut notif, &mut tx).await; - - notif.peers.insert( - peer, - PeerContext { - state: PeerState::Validating { - protocol: ProtocolName::from("/notif/1"), - fallback: None, - direction: Direction::Inbound, - outbound: OutboundState::Open { - handshake: vec![1, 2, 3, 4], - outbound: Substream::new_mock( - PeerId::random(), - SubstreamId::from(0usize), - Box::new(MockSubstream::new()), - ), - }, - inbound: InboundState::SendingHandshake, - }, - }, - ); - notif - .on_handshake_event( - peer, - HandshakeEvent::Negotiated { - peer, - handshake: vec![1], - substream: Substream::new_mock( - PeerId::random(), - SubstreamId::from(0usize), - Box::new(MockSubstream::new()), - ), - direction: protocol::notification::negotiation::Direction::Inbound, - }, - ) - .await; - - match handle.next().await { - Some(NotificationEvent::NotificationStreamOpened { .. }) => {} - _ => panic!("invalid event received"), - } - - // close the substream but don't poll the `NotificationHandle` - notif.shutdown_tx.send(peer).await.unwrap(); - - // close the connection using the handle - handle.close_substream(peer).await; - - // process the events - notif.next_event().await; - notif.next_event().await; - - match notif.peers.get(&peer) { - Some(PeerContext { - state: PeerState::Closed { pending_open: None }, - }) => {} - state => panic!("invalid state: {state:?}"), - } + let _ = tracing_subscriber::fmt() + .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) + .try_init(); + + let (mut notif, mut handle, _, mut tx) = make_notification_protocol(); + let (peer, _, _permit) = register_peer(&mut notif, &mut tx).await; + + notif.peers.insert( + peer, + PeerContext { + state: PeerState::Validating { + protocol: ProtocolName::from("/notif/1"), + fallback: None, + direction: Direction::Inbound, + outbound: OutboundState::Open { + handshake: vec![1, 2, 3, 4], + outbound: Substream::new_mock( + PeerId::random(), + SubstreamId::from(0usize), + Box::new(MockSubstream::new()), + ), + }, + inbound: InboundState::SendingHandshake, + }, + }, + ); + notif + .on_handshake_event( + peer, + HandshakeEvent::Negotiated { + peer, + handshake: vec![1], + substream: Substream::new_mock( + PeerId::random(), + SubstreamId::from(0usize), + Box::new(MockSubstream::new()), + ), + direction: protocol::notification::negotiation::Direction::Inbound, + }, + ) + .await; + + match handle.next().await { + Some(NotificationEvent::NotificationStreamOpened { .. }) => {}, + _ => panic!("invalid event received"), + } + + // close the substream but don't poll the `NotificationHandle` + notif.shutdown_tx.send(peer).await.unwrap(); + + // close the connection using the handle + handle.close_substream(peer).await; + + // process the events + notif.next_event().await; + notif.next_event().await; + + match notif.peers.get(&peer) { + Some(PeerContext { state: PeerState::Closed { pending_open: None } }) => {}, + state => panic!("invalid state: {state:?}"), + } } /// Notification state was not reset correctly if the outbound substream failed to open after @@ -871,72 +840,64 @@ async fn close_already_closed_connection() { /// twice, once when the failure occurred and again when the connection was closed. #[tokio::test] async fn open_failure_reported_once() { - let _ = tracing_subscriber::fmt() - .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) - .try_init(); - - let (mut notif, mut handle, _, mut tx) = make_notification_protocol(); - let (peer, _, _permit) = register_peer(&mut notif, &mut tx).await; - - // move `peer` to state where the inbound substream has been negotiated - // and the local node has initiated an outbound substream - notif.peers.insert( - peer, - PeerContext { - state: PeerState::Validating { - protocol: ProtocolName::from("/notif/1"), - fallback: None, - direction: Direction::Inbound, - outbound: OutboundState::OutboundInitiated { - substream: SubstreamId::from(1337usize), - }, - inbound: InboundState::Open { - inbound: Substream::new_mock( - peer, - SubstreamId::from(0usize), - Box::new(DummySubstream::new()), - ), - }, - }, - }, - ); - notif.pending_outbound.insert(SubstreamId::from(1337usize), peer); - - notif - .on_substream_open_failure( - SubstreamId::from(1337usize), - SubstreamError::ConnectionClosed, - ) - .await; - - match handle.next().await { - Some(NotificationEvent::NotificationStreamOpenFailure { - peer: failed_peer, - error, - }) => { - assert_eq!(failed_peer, peer); - assert_eq!(error, NotificationError::Rejected); - } - _ => panic!("invalid event received"), - } - - match notif.peers.get(&peer) { - Some(PeerContext { - state: PeerState::Closed { pending_open }, - }) => { - assert_eq!(pending_open, &Some(SubstreamId::from(1337usize))); - } - state => panic!("invalid state for peer: {state:?}"), - } - - // connection to `peer` is closed - notif.on_connection_closed(peer).await.unwrap(); - - futures::future::poll_fn(|cx| match handle.poll_next_unpin(cx) { - Poll::Pending => Poll::Ready(()), - result => panic!("didn't expect event from channel, got {result:?}"), - }) - .await; + let _ = tracing_subscriber::fmt() + .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) + .try_init(); + + let (mut notif, mut handle, _, mut tx) = make_notification_protocol(); + let (peer, _, _permit) = register_peer(&mut notif, &mut tx).await; + + // move `peer` to state where the inbound substream has been negotiated + // and the local node has initiated an outbound substream + notif.peers.insert( + peer, + PeerContext { + state: PeerState::Validating { + protocol: ProtocolName::from("/notif/1"), + fallback: None, + direction: Direction::Inbound, + outbound: OutboundState::OutboundInitiated { + substream: SubstreamId::from(1337usize), + }, + inbound: InboundState::Open { + inbound: Substream::new_mock( + peer, + SubstreamId::from(0usize), + Box::new(DummySubstream::new()), + ), + }, + }, + }, + ); + notif.pending_outbound.insert(SubstreamId::from(1337usize), peer); + + notif + .on_substream_open_failure(SubstreamId::from(1337usize), SubstreamError::ConnectionClosed) + .await; + + match handle.next().await { + Some(NotificationEvent::NotificationStreamOpenFailure { peer: failed_peer, error }) => { + assert_eq!(failed_peer, peer); + assert_eq!(error, NotificationError::Rejected); + }, + _ => panic!("invalid event received"), + } + + match notif.peers.get(&peer) { + Some(PeerContext { state: PeerState::Closed { pending_open } }) => { + assert_eq!(pending_open, &Some(SubstreamId::from(1337usize))); + }, + state => panic!("invalid state for peer: {state:?}"), + } + + // connection to `peer` is closed + notif.on_connection_closed(peer).await.unwrap(); + + futures::future::poll_fn(|cx| match handle.poll_next_unpin(cx) { + Poll::Pending => Poll::Ready(()), + result => panic!("didn't expect event from channel, got {result:?}"), + }) + .await; } // inboud substrem was received and it was sent to user for validation @@ -947,70 +908,67 @@ async fn open_failure_reported_once() { // verify that the new substream is rejected and that the peer state is set to `ValidationPending` #[tokio::test] async fn second_inbound_substream_rejected() { - let _ = tracing_subscriber::fmt() - .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) - .try_init(); - - let (mut notif, mut handle, _, mut tx) = make_notification_protocol(); - let (peer, _, _permit) = register_peer(&mut notif, &mut tx).await; - - // move peer state to `Validating` - let mut substream1 = MockSubstream::new(); - substream1.expect_poll_close().times(1).return_once(|_| Poll::Ready(Ok(()))); - - notif.peers.insert( - peer, - PeerContext { - state: PeerState::Validating { - protocol: ProtocolName::from("/notif/1"), - fallback: None, - direction: Direction::Inbound, - outbound: OutboundState::Closed, - inbound: InboundState::Validating { - inbound: Substream::new_mock( - peer, - SubstreamId::from(0usize), - Box::new(substream1), - ), - }, - }, - }, - ); - - // open a new inbound substream because validation took so long that `peer` decided - // to open a new substream - let mut substream2 = MockSubstream::new(); - substream2.expect_poll_close().times(1).return_once(|_| Poll::Ready(Ok(()))); - notif - .on_inbound_substream( - ProtocolName::from("/notif/1"), - None, - peer, - Substream::new_mock(peer, SubstreamId::from(0usize), Box::new(substream2)), - ) - .await - .unwrap(); - - // verify that peer is moved to `ValidationPending` - match notif.peers.get(&peer) { - Some(PeerContext { - state: - PeerState::ValidationPending { - state: ConnectionState::Open, - }, - }) => {} - state => panic!("invalid state for peer: {state:?}"), - } - - // user decide to reject the substream, verify that nothing is received over the event handle - notif.on_validation_result(peer, ValidationResult::Reject).await.unwrap(); - - notif.on_connection_closed(peer).await.unwrap(); - futures::future::poll_fn(|cx| match handle.poll_next_unpin(cx) { - Poll::Pending => Poll::Ready(()), - result => panic!("didn't expect event from channel, got {result:?}"), - }) - .await; + let _ = tracing_subscriber::fmt() + .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) + .try_init(); + + let (mut notif, mut handle, _, mut tx) = make_notification_protocol(); + let (peer, _, _permit) = register_peer(&mut notif, &mut tx).await; + + // move peer state to `Validating` + let mut substream1 = MockSubstream::new(); + substream1.expect_poll_close().times(1).return_once(|_| Poll::Ready(Ok(()))); + + notif.peers.insert( + peer, + PeerContext { + state: PeerState::Validating { + protocol: ProtocolName::from("/notif/1"), + fallback: None, + direction: Direction::Inbound, + outbound: OutboundState::Closed, + inbound: InboundState::Validating { + inbound: Substream::new_mock( + peer, + SubstreamId::from(0usize), + Box::new(substream1), + ), + }, + }, + }, + ); + + // open a new inbound substream because validation took so long that `peer` decided + // to open a new substream + let mut substream2 = MockSubstream::new(); + substream2.expect_poll_close().times(1).return_once(|_| Poll::Ready(Ok(()))); + notif + .on_inbound_substream( + ProtocolName::from("/notif/1"), + None, + peer, + Substream::new_mock(peer, SubstreamId::from(0usize), Box::new(substream2)), + ) + .await + .unwrap(); + + // verify that peer is moved to `ValidationPending` + match notif.peers.get(&peer) { + Some(PeerContext { + state: PeerState::ValidationPending { state: ConnectionState::Open }, + }) => {}, + state => panic!("invalid state for peer: {state:?}"), + } + + // user decide to reject the substream, verify that nothing is received over the event handle + notif.on_validation_result(peer, ValidationResult::Reject).await.unwrap(); + + notif.on_connection_closed(peer).await.unwrap(); + futures::future::poll_fn(|cx| match handle.poll_next_unpin(cx) { + Poll::Pending => Poll::Ready(()), + result => panic!("didn't expect event from channel, got {result:?}"), + }) + .await; } // remote opened a substream, it was accepted by the local node and local node opened an outbound @@ -1021,121 +979,108 @@ async fn second_inbound_substream_rejected() { // connection is still pending #[tokio::test] async fn second_inbound_substream_opened_while_outbound_substream_was_opening() { - let _ = tracing_subscriber::fmt() - .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) - .try_init(); - - let (mut notif, mut handle, _zz, mut tx) = make_notification_protocol(); - let (peer, _zz, _permit) = register_peer(&mut notif, &mut tx).await; - - // move peer state to `Validating` - let mut substream1 = MockSubstream::new(); - substream1 - .expect_poll_ready() - .times(1) - .return_once(|_| Poll::Ready(Err(SubstreamError::ConnectionClosed))); - - notif.peers.insert( - peer, - PeerContext { - state: PeerState::Validating { - protocol: ProtocolName::from("/notif/1"), - fallback: None, - direction: Direction::Inbound, - outbound: OutboundState::Closed, - inbound: InboundState::Validating { - inbound: Substream::new_mock( - peer, - SubstreamId::from(0usize), - Box::new(substream1), - ), - }, - }, - }, - ); - - // accept the inbound substream which is now closed - notif.on_validation_result(peer, ValidationResult::Accept).await.unwrap(); - - // verify that peer is sending handshake and that outbound substream is opening - let substream_id = match notif.peers.get(&peer) { - Some(PeerContext { - state: - PeerState::Validating { - fallback: None, - direction: Direction::Inbound, - outbound: OutboundState::OutboundInitiated { substream }, - inbound: InboundState::SendingHandshake, - .. - }, - }) => *substream, - state => panic!("invalid state for peer: {state:?}"), - }; - - // poll the protocol and send handshake over the inbound substream - notif.next_event().await; - - // verify that peer is closed - match notif.peers.get(&peer) { - Some(PeerContext { - state: - PeerState::Closed { - pending_open: Some(pending_open), - }, - }) => { - assert_eq!(substream_id, *pending_open); - } - state => panic!("invalid state for peer: {state:?}"), - } - - match handle.next().await { - Some(NotificationEvent::NotificationStreamOpenFailure { .. }) => {} - _ => panic!("invalid event received"), - } - - // remote open second inbound substream - let mut substream2 = MockSubstream::new(); - substream2.expect_poll_close().times(1).return_once(|_| Poll::Ready(Ok(()))); - - notif - .on_inbound_substream( - ProtocolName::from("/notif/1"), - None, - peer, - Substream::new_mock(peer, SubstreamId::from(0usize), Box::new(substream2)), - ) - .await - .unwrap(); - - // verify that peer is still closed - match notif.peers.get(&peer) { - Some(PeerContext { - state: - PeerState::Closed { - pending_open: Some(pending_open), - }, - }) => { - assert_eq!(substream_id, *pending_open); - } - state => panic!("invalid state for peer: {state:?}"), - } + let _ = tracing_subscriber::fmt() + .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) + .try_init(); + + let (mut notif, mut handle, _zz, mut tx) = make_notification_protocol(); + let (peer, _zz, _permit) = register_peer(&mut notif, &mut tx).await; + + // move peer state to `Validating` + let mut substream1 = MockSubstream::new(); + substream1 + .expect_poll_ready() + .times(1) + .return_once(|_| Poll::Ready(Err(SubstreamError::ConnectionClosed))); + + notif.peers.insert( + peer, + PeerContext { + state: PeerState::Validating { + protocol: ProtocolName::from("/notif/1"), + fallback: None, + direction: Direction::Inbound, + outbound: OutboundState::Closed, + inbound: InboundState::Validating { + inbound: Substream::new_mock( + peer, + SubstreamId::from(0usize), + Box::new(substream1), + ), + }, + }, + }, + ); + + // accept the inbound substream which is now closed + notif.on_validation_result(peer, ValidationResult::Accept).await.unwrap(); + + // verify that peer is sending handshake and that outbound substream is opening + let substream_id = match notif.peers.get(&peer) { + Some(PeerContext { + state: + PeerState::Validating { + fallback: None, + direction: Direction::Inbound, + outbound: OutboundState::OutboundInitiated { substream }, + inbound: InboundState::SendingHandshake, + .. + }, + }) => *substream, + state => panic!("invalid state for peer: {state:?}"), + }; + + // poll the protocol and send handshake over the inbound substream + notif.next_event().await; + + // verify that peer is closed + match notif.peers.get(&peer) { + Some(PeerContext { state: PeerState::Closed { pending_open: Some(pending_open) } }) => { + assert_eq!(substream_id, *pending_open); + }, + state => panic!("invalid state for peer: {state:?}"), + } + + match handle.next().await { + Some(NotificationEvent::NotificationStreamOpenFailure { .. }) => {}, + _ => panic!("invalid event received"), + } + + // remote open second inbound substream + let mut substream2 = MockSubstream::new(); + substream2.expect_poll_close().times(1).return_once(|_| Poll::Ready(Ok(()))); + + notif + .on_inbound_substream( + ProtocolName::from("/notif/1"), + None, + peer, + Substream::new_mock(peer, SubstreamId::from(0usize), Box::new(substream2)), + ) + .await + .unwrap(); + + // verify that peer is still closed + match notif.peers.get(&peer) { + Some(PeerContext { state: PeerState::Closed { pending_open: Some(pending_open) } }) => { + assert_eq!(substream_id, *pending_open); + }, + state => panic!("invalid state for peer: {state:?}"), + } } #[tokio::test] async fn drop_handle_exits_protocol() { - let _ = tracing_subscriber::fmt() - .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) - .try_init(); + let _ = tracing_subscriber::fmt() + .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) + .try_init(); - let (mut protocol, handle, _sender, _tx) = make_notification_protocol(); + let (mut protocol, handle, _sender, _tx) = make_notification_protocol(); - // Simulate a handle drop. - drop(handle); + // Simulate a handle drop. + drop(handle); - // Call `next_event` and ensure it returns true. - let result = protocol.next_event().await; - assert!( - result, - "Expected `next_event` to return true when `command_rx` is dropped" - ); + // Call `next_event` and ensure it returns true. + let result = protocol.next_event().await; + assert!(result, "Expected `next_event` to return true when `command_rx` is dropped"); } diff --git a/client/litep2p/src/protocol/notification/tests/substream_validation.rs b/client/litep2p/src/protocol/notification/tests/substream_validation.rs index 27e39181..f5516f3a 100644 --- a/client/litep2p/src/protocol/notification/tests/substream_validation.rs +++ b/client/litep2p/src/protocol/notification/tests/substream_validation.rs @@ -19,22 +19,22 @@ // DEALINGS IN THE SOFTWARE. use crate::{ - error::{Error, SubstreamError}, - mock::substream::MockSubstream, - protocol::{ - connection::ConnectionHandle, - notification::{ - negotiation::HandshakeEvent, - tests::{add_peer, make_notification_protocol}, - types::{Direction, NotificationEvent, ValidationResult}, - InboundState, OutboundState, PeerContext, PeerState, - }, - InnerTransportEvent, ProtocolCommand, - }, - substream::Substream, - transport::Endpoint, - types::{protocol::ProtocolName, ConnectionId, SubstreamId}, - PeerId, + error::{Error, SubstreamError}, + mock::substream::MockSubstream, + protocol::{ + connection::ConnectionHandle, + notification::{ + negotiation::HandshakeEvent, + tests::{add_peer, make_notification_protocol}, + types::{Direction, NotificationEvent, ValidationResult}, + InboundState, OutboundState, PeerContext, PeerState, + }, + InnerTransportEvent, ProtocolCommand, + }, + substream::Substream, + transport::Endpoint, + types::{protocol::ProtocolName, ConnectionId, SubstreamId}, + PeerId, }; use bytes::BytesMut; @@ -46,422 +46,393 @@ use std::task::Poll; #[tokio::test] async fn non_existent_peer() { - let (mut notif, _handle, _sender, _) = make_notification_protocol(); + let (mut notif, _handle, _sender, _) = make_notification_protocol(); - if let Err(err) = notif.on_validation_result(PeerId::random(), ValidationResult::Accept).await { - assert!(std::matches!(err, Error::PeerDoesntExist(_))); - } + if let Err(err) = notif.on_validation_result(PeerId::random(), ValidationResult::Accept).await { + assert!(std::matches!(err, Error::PeerDoesntExist(_))); + } } #[tokio::test] async fn substream_accepted() { - let _ = tracing_subscriber::fmt() - .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) - .try_init(); - - let (mut notif, mut handle, _sender, tx) = make_notification_protocol(); - let (peer, _service, _receiver) = add_peer(); - let handshake = BytesMut::from(&b"hello"[..]); - let mut substream = MockSubstream::new(); - substream - .expect_poll_next() - .times(1) - .return_once(|_| Poll::Ready(Some(Ok(BytesMut::from(&b"hello"[..]))))); - substream.expect_poll_ready().times(1).return_once(|_| Poll::Ready(Ok(()))); - substream.expect_start_send().times(1).return_once(|_| Ok(())); - substream.expect_poll_flush().times(1).return_once(|_| Poll::Ready(Ok(()))); - - let (proto_tx, mut proto_rx) = channel(256); - tx.send(InnerTransportEvent::ConnectionEstablished { - peer, - endpoint: Endpoint::dialer(Multiaddr::empty(), ConnectionId::from(0usize)), - sender: ConnectionHandle::new(ConnectionId::from(0usize), proto_tx.clone()), - connection: ConnectionId::from(0usize), - }) - .await - .unwrap(); - - // connect peer and verify it's in closed state - notif.next_event().await; - - match ¬if.peers.get(&peer).unwrap().state { - PeerState::Closed { .. } => {} - state => panic!("invalid state for peer: {state:?}"), - } - - // open inbound substream and verify that peer state has changed to `Validating` - notif - .on_inbound_substream( - ProtocolName::from("/notif/1"), - None, - peer, - Substream::new_mock( - PeerId::random(), - SubstreamId::from(0usize), - Box::new(substream), - ), - ) - .await - .unwrap(); - - match ¬if.peers.get(&peer).unwrap().state { - PeerState::Validating { - direction: Direction::Inbound, - protocol: _, - fallback: None, - inbound: InboundState::ReadingHandshake, - outbound: OutboundState::Closed, - } => {} - state => panic!("invalid state for peer: {state:?}"), - } - - // get negotiation event - let (peer, event) = notif.negotiation.next().await.unwrap(); - notif.on_handshake_event(peer, event).await; - - // user protocol receives the protocol accepts it - assert_eq!( - handle.next().await.unwrap(), - NotificationEvent::ValidateSubstream { - protocol: ProtocolName::from("/notif/1"), - fallback: None, - peer, - handshake: handshake.into() - }, - ); - notif.on_validation_result(peer, ValidationResult::Accept).await.unwrap(); - - // poll negotiation to finish the handshake - let (peer, event) = notif.negotiation.next().await.unwrap(); - notif.on_handshake_event(peer, event).await; - - // protocol asks for outbound substream to be opened and its state is changed accordingly - let ProtocolCommand::OpenSubstream { - protocol, - substream_id, - .. - } = proto_rx.recv().await.unwrap() - else { - panic!("invalid commnd received"); - }; - assert_eq!(protocol, ProtocolName::from("/notif/1")); - assert_eq!(substream_id, SubstreamId::from(0usize)); - - let expected = SubstreamId::from(0usize); - - match ¬if.peers.get(&peer).unwrap().state { - PeerState::Validating { - direction: Direction::Inbound, - protocol: _, - fallback: None, - inbound: InboundState::Open { .. }, - outbound: OutboundState::OutboundInitiated { substream }, - } => { - assert_eq!(substream, &expected); - } - state => panic!("invalid state for peer: {state:?}"), - } + let _ = tracing_subscriber::fmt() + .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) + .try_init(); + + let (mut notif, mut handle, _sender, tx) = make_notification_protocol(); + let (peer, _service, _receiver) = add_peer(); + let handshake = BytesMut::from(&b"hello"[..]); + let mut substream = MockSubstream::new(); + substream + .expect_poll_next() + .times(1) + .return_once(|_| Poll::Ready(Some(Ok(BytesMut::from(&b"hello"[..]))))); + substream.expect_poll_ready().times(1).return_once(|_| Poll::Ready(Ok(()))); + substream.expect_start_send().times(1).return_once(|_| Ok(())); + substream.expect_poll_flush().times(1).return_once(|_| Poll::Ready(Ok(()))); + + let (proto_tx, mut proto_rx) = channel(256); + tx.send(InnerTransportEvent::ConnectionEstablished { + peer, + endpoint: Endpoint::dialer(Multiaddr::empty(), ConnectionId::from(0usize)), + sender: ConnectionHandle::new(ConnectionId::from(0usize), proto_tx.clone()), + connection: ConnectionId::from(0usize), + }) + .await + .unwrap(); + + // connect peer and verify it's in closed state + notif.next_event().await; + + match ¬if.peers.get(&peer).unwrap().state { + PeerState::Closed { .. } => {}, + state => panic!("invalid state for peer: {state:?}"), + } + + // open inbound substream and verify that peer state has changed to `Validating` + notif + .on_inbound_substream( + ProtocolName::from("/notif/1"), + None, + peer, + Substream::new_mock(PeerId::random(), SubstreamId::from(0usize), Box::new(substream)), + ) + .await + .unwrap(); + + match ¬if.peers.get(&peer).unwrap().state { + PeerState::Validating { + direction: Direction::Inbound, + protocol: _, + fallback: None, + inbound: InboundState::ReadingHandshake, + outbound: OutboundState::Closed, + } => {}, + state => panic!("invalid state for peer: {state:?}"), + } + + // get negotiation event + let (peer, event) = notif.negotiation.next().await.unwrap(); + notif.on_handshake_event(peer, event).await; + + // user protocol receives the protocol accepts it + assert_eq!( + handle.next().await.unwrap(), + NotificationEvent::ValidateSubstream { + protocol: ProtocolName::from("/notif/1"), + fallback: None, + peer, + handshake: handshake.into() + }, + ); + notif.on_validation_result(peer, ValidationResult::Accept).await.unwrap(); + + // poll negotiation to finish the handshake + let (peer, event) = notif.negotiation.next().await.unwrap(); + notif.on_handshake_event(peer, event).await; + + // protocol asks for outbound substream to be opened and its state is changed accordingly + let ProtocolCommand::OpenSubstream { protocol, substream_id, .. } = + proto_rx.recv().await.unwrap() + else { + panic!("invalid commnd received"); + }; + assert_eq!(protocol, ProtocolName::from("/notif/1")); + assert_eq!(substream_id, SubstreamId::from(0usize)); + + let expected = SubstreamId::from(0usize); + + match ¬if.peers.get(&peer).unwrap().state { + PeerState::Validating { + direction: Direction::Inbound, + protocol: _, + fallback: None, + inbound: InboundState::Open { .. }, + outbound: OutboundState::OutboundInitiated { substream }, + } => { + assert_eq!(substream, &expected); + }, + state => panic!("invalid state for peer: {state:?}"), + } } #[tokio::test] async fn substream_rejected() { - let _ = tracing_subscriber::fmt() - .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) - .try_init(); - - let (mut notif, mut handle, _sender, _tx) = make_notification_protocol(); - let (peer, _service, mut receiver) = add_peer(); - let handshake = BytesMut::from(&b"hello"[..]); - let mut substream = MockSubstream::new(); - substream - .expect_poll_next() - .times(1) - .return_once(|_| Poll::Ready(Some(Ok(BytesMut::from(&b"hello"[..]))))); - substream.expect_poll_close().times(1).return_once(|_| Poll::Ready(Ok(()))); - - // connect peer and verify it's in closed state - notif.on_connection_established(peer).await.unwrap(); - - match ¬if.peers.get(&peer).unwrap().state { - PeerState::Closed { .. } => {} - state => panic!("invalid state for peer: {state:?}"), - } - - // open inbound substream and verify that peer state has changed to `Validating` - notif - .on_inbound_substream( - ProtocolName::from("/notif/1"), - None, - peer, - Substream::new_mock( - PeerId::random(), - SubstreamId::from(0usize), - Box::new(substream), - ), - ) - .await - .unwrap(); - - match ¬if.peers.get(&peer).unwrap().state { - PeerState::Validating { - direction: Direction::Inbound, - protocol: _, - fallback: None, - inbound: InboundState::ReadingHandshake, - outbound: OutboundState::Closed, - } => {} - state => panic!("invalid state for peer: {state:?}"), - } - - // get negotiation event - let (peer, event) = notif.negotiation.next().await.unwrap(); - notif.on_handshake_event(peer, event).await; - - // user protocol receives the protocol accepts it - assert_eq!( - handle.next().await.unwrap(), - NotificationEvent::ValidateSubstream { - protocol: ProtocolName::from("/notif/1"), - fallback: None, - peer, - handshake: handshake.into() - }, - ); - notif.on_validation_result(peer, ValidationResult::Reject).await.unwrap(); - - // substream is rejected so no outbound substraem is opened and peer is converted to closed - // state - match ¬if.peers.get(&peer).unwrap().state { - PeerState::Closed { .. } => {} - state => panic!("invalid state for peer: {state:?}"), - } - - assert!(receiver.try_recv().is_err()); + let _ = tracing_subscriber::fmt() + .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) + .try_init(); + + let (mut notif, mut handle, _sender, _tx) = make_notification_protocol(); + let (peer, _service, mut receiver) = add_peer(); + let handshake = BytesMut::from(&b"hello"[..]); + let mut substream = MockSubstream::new(); + substream + .expect_poll_next() + .times(1) + .return_once(|_| Poll::Ready(Some(Ok(BytesMut::from(&b"hello"[..]))))); + substream.expect_poll_close().times(1).return_once(|_| Poll::Ready(Ok(()))); + + // connect peer and verify it's in closed state + notif.on_connection_established(peer).await.unwrap(); + + match ¬if.peers.get(&peer).unwrap().state { + PeerState::Closed { .. } => {}, + state => panic!("invalid state for peer: {state:?}"), + } + + // open inbound substream and verify that peer state has changed to `Validating` + notif + .on_inbound_substream( + ProtocolName::from("/notif/1"), + None, + peer, + Substream::new_mock(PeerId::random(), SubstreamId::from(0usize), Box::new(substream)), + ) + .await + .unwrap(); + + match ¬if.peers.get(&peer).unwrap().state { + PeerState::Validating { + direction: Direction::Inbound, + protocol: _, + fallback: None, + inbound: InboundState::ReadingHandshake, + outbound: OutboundState::Closed, + } => {}, + state => panic!("invalid state for peer: {state:?}"), + } + + // get negotiation event + let (peer, event) = notif.negotiation.next().await.unwrap(); + notif.on_handshake_event(peer, event).await; + + // user protocol receives the protocol accepts it + assert_eq!( + handle.next().await.unwrap(), + NotificationEvent::ValidateSubstream { + protocol: ProtocolName::from("/notif/1"), + fallback: None, + peer, + handshake: handshake.into() + }, + ); + notif.on_validation_result(peer, ValidationResult::Reject).await.unwrap(); + + // substream is rejected so no outbound substraem is opened and peer is converted to closed + // state + match ¬if.peers.get(&peer).unwrap().state { + PeerState::Closed { .. } => {}, + state => panic!("invalid state for peer: {state:?}"), + } + + assert!(receiver.try_recv().is_err()); } #[tokio::test] async fn accept_fails_due_to_closed_substream() { - let _ = tracing_subscriber::fmt() - .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) - .try_init(); - - let (mut notif, mut handle, _sender, tx) = make_notification_protocol(); - let (peer, _service, _receiver) = add_peer(); - let handshake = BytesMut::from(&b"hello"[..]); - let mut substream = MockSubstream::new(); - substream - .expect_poll_next() - .times(1) - .return_once(|_| Poll::Ready(Some(Ok(BytesMut::from(&b"hello"[..]))))); - substream - .expect_poll_ready() - .times(1) - .return_once(|_| Poll::Ready(Err(SubstreamError::ConnectionClosed))); - - let (proto_tx, _proto_rx) = channel(256); - tx.send(InnerTransportEvent::ConnectionEstablished { - peer, - endpoint: Endpoint::dialer(Multiaddr::empty(), ConnectionId::from(0usize)), - sender: ConnectionHandle::new(ConnectionId::from(0usize), proto_tx), - connection: ConnectionId::from(0usize), - }) - .await - .unwrap(); - - // connect peer and verify it's in closed state - notif.next_event().await; - - match ¬if.peers.get(&peer).unwrap().state { - PeerState::Closed { .. } => {} - state => panic!("invalid state for peer: {state:?}"), - } - - // open inbound substream and verify that peer state has changed to `InboundOpen` - notif - .on_inbound_substream( - ProtocolName::from("/notif/1"), - None, - peer, - Substream::new_mock( - PeerId::random(), - SubstreamId::from(0usize), - Box::new(substream), - ), - ) - .await - .unwrap(); - - match ¬if.peers.get(&peer).unwrap().state { - PeerState::Validating { - direction: Direction::Inbound, - protocol: _, - fallback: None, - inbound: InboundState::ReadingHandshake, - outbound: OutboundState::Closed, - } => {} - state => panic!("invalid state for peer: {state:?}"), - } - - // get negotiation event - let (peer, event) = notif.negotiation.next().await.unwrap(); - notif.on_handshake_event(peer, event).await; - - // user protocol receives the protocol accepts it - assert_eq!( - handle.next().await.unwrap(), - NotificationEvent::ValidateSubstream { - protocol: ProtocolName::from("/notif/1"), - fallback: None, - peer, - handshake: handshake.into() - }, - ); - - notif.on_validation_result(peer, ValidationResult::Accept).await.unwrap(); - - // get negotiation event - let (event_peer, event) = notif.negotiation.next().await.unwrap(); - match &event { - HandshakeEvent::NegotiationError { peer, .. } => { - assert_eq!(*peer, event_peer); - } - event => panic!("invalid event for peer: {event:?}"), - } - notif.on_handshake_event(peer, event).await; - - match ¬if.peers.get(&peer).unwrap().state { - PeerState::Closed { .. } => {} - state => panic!("invalid state for peer: {state:?}"), - } + let _ = tracing_subscriber::fmt() + .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) + .try_init(); + + let (mut notif, mut handle, _sender, tx) = make_notification_protocol(); + let (peer, _service, _receiver) = add_peer(); + let handshake = BytesMut::from(&b"hello"[..]); + let mut substream = MockSubstream::new(); + substream + .expect_poll_next() + .times(1) + .return_once(|_| Poll::Ready(Some(Ok(BytesMut::from(&b"hello"[..]))))); + substream + .expect_poll_ready() + .times(1) + .return_once(|_| Poll::Ready(Err(SubstreamError::ConnectionClosed))); + + let (proto_tx, _proto_rx) = channel(256); + tx.send(InnerTransportEvent::ConnectionEstablished { + peer, + endpoint: Endpoint::dialer(Multiaddr::empty(), ConnectionId::from(0usize)), + sender: ConnectionHandle::new(ConnectionId::from(0usize), proto_tx), + connection: ConnectionId::from(0usize), + }) + .await + .unwrap(); + + // connect peer and verify it's in closed state + notif.next_event().await; + + match ¬if.peers.get(&peer).unwrap().state { + PeerState::Closed { .. } => {}, + state => panic!("invalid state for peer: {state:?}"), + } + + // open inbound substream and verify that peer state has changed to `InboundOpen` + notif + .on_inbound_substream( + ProtocolName::from("/notif/1"), + None, + peer, + Substream::new_mock(PeerId::random(), SubstreamId::from(0usize), Box::new(substream)), + ) + .await + .unwrap(); + + match ¬if.peers.get(&peer).unwrap().state { + PeerState::Validating { + direction: Direction::Inbound, + protocol: _, + fallback: None, + inbound: InboundState::ReadingHandshake, + outbound: OutboundState::Closed, + } => {}, + state => panic!("invalid state for peer: {state:?}"), + } + + // get negotiation event + let (peer, event) = notif.negotiation.next().await.unwrap(); + notif.on_handshake_event(peer, event).await; + + // user protocol receives the protocol accepts it + assert_eq!( + handle.next().await.unwrap(), + NotificationEvent::ValidateSubstream { + protocol: ProtocolName::from("/notif/1"), + fallback: None, + peer, + handshake: handshake.into() + }, + ); + + notif.on_validation_result(peer, ValidationResult::Accept).await.unwrap(); + + // get negotiation event + let (event_peer, event) = notif.negotiation.next().await.unwrap(); + match &event { + HandshakeEvent::NegotiationError { peer, .. } => { + assert_eq!(*peer, event_peer); + }, + event => panic!("invalid event for peer: {event:?}"), + } + notif.on_handshake_event(peer, event).await; + + match ¬if.peers.get(&peer).unwrap().state { + PeerState::Closed { .. } => {}, + state => panic!("invalid state for peer: {state:?}"), + } } #[tokio::test] async fn accept_fails_due_to_closed_connection() { - let _ = tracing_subscriber::fmt() - .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) - .try_init(); - - let (mut notif, mut handle, _sender, tx) = make_notification_protocol(); - let (peer, _service, _receiver) = add_peer(); - let handshake = BytesMut::from(&b"hello"[..]); - let mut substream = MockSubstream::new(); - substream - .expect_poll_next() - .times(1) - .return_once(|_| Poll::Ready(Some(Ok(BytesMut::from(&b"hello"[..]))))); - substream.expect_poll_close().times(1).return_once(|_| Poll::Ready(Ok(()))); - - let (proto_tx, proto_rx) = channel(256); - tx.send(InnerTransportEvent::ConnectionEstablished { - peer, - endpoint: Endpoint::dialer(Multiaddr::empty(), ConnectionId::from(0usize)), - sender: ConnectionHandle::new(ConnectionId::from(0usize), proto_tx), - connection: ConnectionId::from(0usize), - }) - .await - .unwrap(); - - // connect peer and verify it's in closed state - notif.next_event().await; - - match notif.peers.get(&peer).unwrap().state { - PeerState::Closed { .. } => {} - _ => panic!("invalid state for peer"), - } - - // open inbound substream and verify that peer state has changed to `InboundOpen` - notif - .on_inbound_substream( - ProtocolName::from("/notif/1"), - None, - peer, - Substream::new_mock( - PeerId::random(), - SubstreamId::from(0usize), - Box::new(substream), - ), - ) - .await - .unwrap(); - - match ¬if.peers.get(&peer).unwrap().state { - PeerState::Validating { - direction: Direction::Inbound, - protocol: _, - fallback: None, - inbound: InboundState::ReadingHandshake, - outbound: OutboundState::Closed, - } => {} - state => panic!("invalid state for peer: {state:?}"), - } - - // get negotiation event - let (peer, event) = notif.negotiation.next().await.unwrap(); - notif.on_handshake_event(peer, event).await; - - // user protocol receives the protocol accepts it - assert_eq!( - handle.next().await.unwrap(), - NotificationEvent::ValidateSubstream { - protocol: ProtocolName::from("/notif/1"), - fallback: None, - peer, - handshake: handshake.into() - }, - ); - - // drop the connection and verify that the protocol doesn't make any outbound substream - // requests and instead marks the connection as closed - drop(proto_rx); - - assert!(notif.on_validation_result(peer, ValidationResult::Accept).await.is_err()); - - match ¬if.peers.get(&peer).unwrap().state { - PeerState::Closed { .. } => {} - state => panic!("invalid state for peer: {state:?}"), - } + let _ = tracing_subscriber::fmt() + .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) + .try_init(); + + let (mut notif, mut handle, _sender, tx) = make_notification_protocol(); + let (peer, _service, _receiver) = add_peer(); + let handshake = BytesMut::from(&b"hello"[..]); + let mut substream = MockSubstream::new(); + substream + .expect_poll_next() + .times(1) + .return_once(|_| Poll::Ready(Some(Ok(BytesMut::from(&b"hello"[..]))))); + substream.expect_poll_close().times(1).return_once(|_| Poll::Ready(Ok(()))); + + let (proto_tx, proto_rx) = channel(256); + tx.send(InnerTransportEvent::ConnectionEstablished { + peer, + endpoint: Endpoint::dialer(Multiaddr::empty(), ConnectionId::from(0usize)), + sender: ConnectionHandle::new(ConnectionId::from(0usize), proto_tx), + connection: ConnectionId::from(0usize), + }) + .await + .unwrap(); + + // connect peer and verify it's in closed state + notif.next_event().await; + + match notif.peers.get(&peer).unwrap().state { + PeerState::Closed { .. } => {}, + _ => panic!("invalid state for peer"), + } + + // open inbound substream and verify that peer state has changed to `InboundOpen` + notif + .on_inbound_substream( + ProtocolName::from("/notif/1"), + None, + peer, + Substream::new_mock(PeerId::random(), SubstreamId::from(0usize), Box::new(substream)), + ) + .await + .unwrap(); + + match ¬if.peers.get(&peer).unwrap().state { + PeerState::Validating { + direction: Direction::Inbound, + protocol: _, + fallback: None, + inbound: InboundState::ReadingHandshake, + outbound: OutboundState::Closed, + } => {}, + state => panic!("invalid state for peer: {state:?}"), + } + + // get negotiation event + let (peer, event) = notif.negotiation.next().await.unwrap(); + notif.on_handshake_event(peer, event).await; + + // user protocol receives the protocol accepts it + assert_eq!( + handle.next().await.unwrap(), + NotificationEvent::ValidateSubstream { + protocol: ProtocolName::from("/notif/1"), + fallback: None, + peer, + handshake: handshake.into() + }, + ); + + // drop the connection and verify that the protocol doesn't make any outbound substream + // requests and instead marks the connection as closed + drop(proto_rx); + + assert!(notif.on_validation_result(peer, ValidationResult::Accept).await.is_err()); + + match ¬if.peers.get(&peer).unwrap().state { + PeerState::Closed { .. } => {}, + state => panic!("invalid state for peer: {state:?}"), + } } #[tokio::test] #[should_panic] #[cfg(debug_assertions)] async fn open_substream_accepted() { - use tokio::sync::oneshot; + use tokio::sync::oneshot; - let (mut notif, _handle, _sender, _tx) = make_notification_protocol(); - let (peer, _service, _receiver) = add_peer(); - let (shutdown, _rx) = oneshot::channel(); + let (mut notif, _handle, _sender, _tx) = make_notification_protocol(); + let (peer, _service, _receiver) = add_peer(); + let (shutdown, _rx) = oneshot::channel(); - notif.peers.insert( - peer, - PeerContext { - state: PeerState::Open { shutdown }, - }, - ); + notif.peers.insert(peer, PeerContext { state: PeerState::Open { shutdown } }); - // try to accept a closed substream - notif.on_close_substream(peer).await; + // try to accept a closed substream + notif.on_close_substream(peer).await; - assert!(notif.on_validation_result(peer, ValidationResult::Accept).await.is_err()); + assert!(notif.on_validation_result(peer, ValidationResult::Accept).await.is_err()); } #[tokio::test] #[should_panic] #[cfg(debug_assertions)] async fn open_substream_rejected() { - let (mut notif, _handle, _sender, _tx) = make_notification_protocol(); - let (peer, _service, _receiver) = add_peer(); - let (shutdown, _rx) = oneshot::channel(); + let (mut notif, _handle, _sender, _tx) = make_notification_protocol(); + let (peer, _service, _receiver) = add_peer(); + let (shutdown, _rx) = oneshot::channel(); - notif.peers.insert( - peer, - PeerContext { - state: PeerState::Open { shutdown }, - }, - ); + notif.peers.insert(peer, PeerContext { state: PeerState::Open { shutdown } }); - // try to reject a closed substream - notif.on_close_substream(peer).await; + // try to reject a closed substream + notif.on_close_substream(peer).await; - assert!(notif.on_validation_result(peer, ValidationResult::Reject).await.is_err()); + assert!(notif.on_validation_result(peer, ValidationResult::Reject).await.is_err()); } diff --git a/client/litep2p/src/protocol/notification/types.rs b/client/litep2p/src/protocol/notification/types.rs index 5afc514d..3e46b144 100644 --- a/client/litep2p/src/protocol/notification/types.rs +++ b/client/litep2p/src/protocol/notification/types.rs @@ -19,7 +19,7 @@ // DEALINGS IN THE SOFTWARE. use crate::{ - protocol::notification::handle::NotificationSink, types::protocol::ProtocolName, PeerId, + protocol::notification::handle::NotificationSink, types::protocol::ProtocolName, PeerId, }; use bytes::BytesMut; @@ -36,190 +36,190 @@ pub(super) const ASYNC_CHANNEL_SIZE: usize = 8; /// Direction of the connection. #[derive(Debug, Copy, Clone, PartialEq, Eq)] pub enum Direction { - /// Connection is considered inbound, i.e., it was initiated by the remote node. - Inbound, + /// Connection is considered inbound, i.e., it was initiated by the remote node. + Inbound, - /// Connection is considered outbound, i.e., it was initiated by the local node. - Outbound, + /// Connection is considered outbound, i.e., it was initiated by the local node. + Outbound, } /// Validation result. #[derive(Debug, Copy, Clone, PartialEq, Eq)] pub enum ValidationResult { - /// Accept the inbound substream. - Accept, + /// Accept the inbound substream. + Accept, - /// Reject the inbound substream. - Reject, + /// Reject the inbound substream. + Reject, } /// Notification error. #[derive(Debug, Clone, PartialEq, Eq)] pub enum NotificationError { - /// Remote rejected the substream. - Rejected, + /// Remote rejected the substream. + Rejected, - /// Connection to peer doesn't exist. - NoConnection, + /// Connection to peer doesn't exist. + NoConnection, - /// Synchronous notification channel is clogged. - ChannelClogged, + /// Synchronous notification channel is clogged. + ChannelClogged, - /// Validation for a previous substream still pending. - ValidationPending, + /// Validation for a previous substream still pending. + ValidationPending, - /// Failed to dial peer. - DialFailure, + /// Failed to dial peer. + DialFailure, - /// Notification protocol has been closed. - EssentialTaskClosed, + /// Notification protocol has been closed. + EssentialTaskClosed, } /// Notification events. pub(crate) enum InnerNotificationEvent { - /// Validate substream. - ValidateSubstream { - /// Protocol name. - protocol: ProtocolName, + /// Validate substream. + ValidateSubstream { + /// Protocol name. + protocol: ProtocolName, - /// Fallback, if the substream was negotiated using a fallback protocol. - fallback: Option, + /// Fallback, if the substream was negotiated using a fallback protocol. + fallback: Option, - /// Peer ID. - peer: PeerId, + /// Peer ID. + peer: PeerId, - /// Handshake. - handshake: Vec, + /// Handshake. + handshake: Vec, - /// `oneshot::Sender` for sending the validation result back to the protocol. - tx: oneshot::Sender, - }, + /// `oneshot::Sender` for sending the validation result back to the protocol. + tx: oneshot::Sender, + }, - /// Notification stream opened. - NotificationStreamOpened { - /// Protocol name. - protocol: ProtocolName, + /// Notification stream opened. + NotificationStreamOpened { + /// Protocol name. + protocol: ProtocolName, - /// Fallback, if the substream was negotiated using a fallback protocol. - fallback: Option, + /// Fallback, if the substream was negotiated using a fallback protocol. + fallback: Option, - /// Direction of the substream. - direction: Direction, + /// Direction of the substream. + direction: Direction, - /// Peer ID. - peer: PeerId, + /// Peer ID. + peer: PeerId, - /// Handshake. - handshake: Vec, + /// Handshake. + handshake: Vec, - /// Notification sink. - sink: NotificationSink, - }, + /// Notification sink. + sink: NotificationSink, + }, - /// Notification stream closed. - NotificationStreamClosed { - /// Peer ID. - peer: PeerId, - }, + /// Notification stream closed. + NotificationStreamClosed { + /// Peer ID. + peer: PeerId, + }, - /// Failed to open notification stream. - NotificationStreamOpenFailure { - /// Peer ID. - peer: PeerId, + /// Failed to open notification stream. + NotificationStreamOpenFailure { + /// Peer ID. + peer: PeerId, - /// Error. - error: NotificationError, - }, + /// Error. + error: NotificationError, + }, } /// Notification events. #[derive(Debug, Clone, PartialEq, Eq)] pub enum NotificationEvent { - /// Validate substream. - ValidateSubstream { - /// Protocol name. - protocol: ProtocolName, - - /// Fallback, if the substream was negotiated using a fallback protocol. - fallback: Option, - - /// Peer ID. - peer: PeerId, - - /// Handshake. - handshake: Vec, - }, - - /// Notification stream opened. - NotificationStreamOpened { - /// Protocol name. - protocol: ProtocolName, - - /// Fallback, if the substream was negotiated using a fallback protocol. - fallback: Option, - - /// Direction of the substream. - /// - /// [`Direction::Inbound`](crate::protocol::Direction::Outbound) indicates that the - /// substream was opened by the remote peer and - /// [`Direction::Outbound`](crate::protocol::Direction::Outbound) that it was - /// opened by the local node. - direction: Direction, - - /// Peer ID. - peer: PeerId, - - /// Handshake. - handshake: Vec, - }, - - /// Notification stream closed. - NotificationStreamClosed { - /// Peer ID. - peer: PeerId, - }, - - /// Failed to open notification stream. - NotificationStreamOpenFailure { - /// Peer ID. - peer: PeerId, - - /// Error. - error: NotificationError, - }, - - /// Notification received. - NotificationReceived { - /// Peer ID. - peer: PeerId, - - /// Notification. - notification: BytesMut, - }, + /// Validate substream. + ValidateSubstream { + /// Protocol name. + protocol: ProtocolName, + + /// Fallback, if the substream was negotiated using a fallback protocol. + fallback: Option, + + /// Peer ID. + peer: PeerId, + + /// Handshake. + handshake: Vec, + }, + + /// Notification stream opened. + NotificationStreamOpened { + /// Protocol name. + protocol: ProtocolName, + + /// Fallback, if the substream was negotiated using a fallback protocol. + fallback: Option, + + /// Direction of the substream. + /// + /// [`Direction::Inbound`](crate::protocol::Direction::Outbound) indicates that the + /// substream was opened by the remote peer and + /// [`Direction::Outbound`](crate::protocol::Direction::Outbound) that it was + /// opened by the local node. + direction: Direction, + + /// Peer ID. + peer: PeerId, + + /// Handshake. + handshake: Vec, + }, + + /// Notification stream closed. + NotificationStreamClosed { + /// Peer ID. + peer: PeerId, + }, + + /// Failed to open notification stream. + NotificationStreamOpenFailure { + /// Peer ID. + peer: PeerId, + + /// Error. + error: NotificationError, + }, + + /// Notification received. + NotificationReceived { + /// Peer ID. + peer: PeerId, + + /// Notification. + notification: BytesMut, + }, } /// Notification commands sent to the protocol. #[derive(Debug)] #[cfg_attr(feature = "fuzz", derive(serde::Serialize, serde::Deserialize))] pub enum NotificationCommand { - /// Open substreams to one or more peers. - OpenSubstream { - /// Peer IDs. - peers: HashSet, - }, - - /// Close substreams to one or more peers. - CloseSubstream { - /// Peer IDs. - peers: HashSet, - }, - - /// Force close the connection because notification channel is clogged. - ForceClose { - /// Peer to disconnect. - peer: PeerId, - }, - - #[cfg(feature = "fuzz")] - SendNotification { notif: Vec, peer_id: PeerId }, + /// Open substreams to one or more peers. + OpenSubstream { + /// Peer IDs. + peers: HashSet, + }, + + /// Close substreams to one or more peers. + CloseSubstream { + /// Peer IDs. + peers: HashSet, + }, + + /// Force close the connection because notification channel is clogged. + ForceClose { + /// Peer to disconnect. + peer: PeerId, + }, + + #[cfg(feature = "fuzz")] + SendNotification { notif: Vec, peer_id: PeerId }, } diff --git a/client/litep2p/src/protocol/protocol_set.rs b/client/litep2p/src/protocol/protocol_set.rs index a4618807..df427ffe 100644 --- a/client/litep2p/src/protocol/protocol_set.rs +++ b/client/litep2p/src/protocol/protocol_set.rs @@ -19,23 +19,23 @@ // DEALINGS IN THE SOFTWARE. use crate::{ - codec::ProtocolCodec, - error::{Error, NegotiationError, SubstreamError}, - multistream_select::{ - NegotiationError as MultiStreamNegotiationError, ProtocolError as MultiStreamProtocolError, - }, - protocol::{ - connection::{ConnectionHandle, Permit}, - transport_service::SubstreamKeepAlive, - Direction, TransportEvent, - }, - substream::Substream, - transport::{ - manager::{ProtocolContext, TransportManagerEvent}, - Endpoint, - }, - types::{protocol::ProtocolName, ConnectionId, SubstreamId}, - PeerId, + codec::ProtocolCodec, + error::{Error, NegotiationError, SubstreamError}, + multistream_select::{ + NegotiationError as MultiStreamNegotiationError, ProtocolError as MultiStreamProtocolError, + }, + protocol::{ + connection::{ConnectionHandle, Permit}, + transport_service::SubstreamKeepAlive, + Direction, TransportEvent, + }, + substream::Substream, + transport::{ + manager::{ProtocolContext, TransportManagerEvent}, + Endpoint, + }, + types::{protocol::ProtocolName, ConnectionId, SubstreamId}, + PeerId, }; use futures::{stream::FuturesUnordered, Stream, StreamExt}; @@ -45,11 +45,11 @@ use tokio::sync::mpsc::{channel, Receiver, Sender}; #[cfg(any(feature = "quic", feature = "webrtc", feature = "websocket"))] use std::sync::atomic::Ordering; use std::{ - collections::HashMap, - fmt::Debug, - pin::Pin, - sync::{atomic::AtomicUsize, Arc}, - task::{Context, Poll}, + collections::HashMap, + fmt::Debug, + pin::Pin, + sync::{atomic::AtomicUsize, Arc}, + task::{Context, Poll}, }; /// Logging target for the file. @@ -58,167 +58,161 @@ const LOG_TARGET: &str = "litep2p::protocol-set"; /// Events emitted by the underlying transport protocols. #[derive(Debug)] pub enum InnerTransportEvent { - /// Connection established to `peer`. - ConnectionEstablished { - /// Peer ID. - peer: PeerId, - - /// Connection ID. - connection: ConnectionId, - - /// Endpoint. - endpoint: Endpoint, - - /// Handle for communicating with the connection. - sender: ConnectionHandle, - }, - - /// Connection closed. - ConnectionClosed { - /// Peer ID. - peer: PeerId, - - /// Connection ID. - connection: ConnectionId, - }, - - /// Failed to dial peer. - /// - /// This is reported to that protocol which initiated the connection. - DialFailure { - /// Peer ID. - peer: PeerId, - - /// Dialed addresses. - addresses: Vec, - }, - - /// Substream opened for `peer`. - SubstreamOpened { - /// Peer ID. - peer: PeerId, - - /// Protocol name. - /// - /// One protocol handler may handle multiple sub-protocols (such as `/ipfs/identify/1.0.0` - /// and `/ipfs/identify/push/1.0.0`) or it may have aliases which should be handled by - /// the same protocol handler. When the substream is sent from transport to the protocol - /// handler, the protocol name that was used to negotiate the substream is also sent so - /// the protocol can handle the substream appropriately. - protocol: ProtocolName, - - /// Fallback name. - /// - /// If the substream was negotiated using a fallback name of the main protocol, - /// `fallback` is `Some`. - fallback: Option, - - /// Substream direction. - /// - /// Informs the protocol whether the substream is inbound (opened by the remote node) - /// or outbound (opened by the local node). This allows the protocol to distinguish - /// between the two types of substreams and execute correct code for the substream. - /// - /// Outbound substreams also contain the substream ID which allows the protocol to - /// distinguish between different outbound substreams. - direction: Direction, - - /// Connection ID. - connection_id: ConnectionId, - - /// Substream. - substream: Substream, - - /// Permit that was held while this substream was opening. Must be dropped by - /// [`TransportService`](crate::protocol::TransportService) once connection is upgraded. - opening_permit: Permit, - }, - - /// Failed to open substream. - /// - /// Substream open failures are reported only for outbound substreams. - SubstreamOpenFailure { - /// Substream ID. - substream: SubstreamId, - - /// Error that occurred when the substream was being opened. - error: SubstreamError, - }, + /// Connection established to `peer`. + ConnectionEstablished { + /// Peer ID. + peer: PeerId, + + /// Connection ID. + connection: ConnectionId, + + /// Endpoint. + endpoint: Endpoint, + + /// Handle for communicating with the connection. + sender: ConnectionHandle, + }, + + /// Connection closed. + ConnectionClosed { + /// Peer ID. + peer: PeerId, + + /// Connection ID. + connection: ConnectionId, + }, + + /// Failed to dial peer. + /// + /// This is reported to that protocol which initiated the connection. + DialFailure { + /// Peer ID. + peer: PeerId, + + /// Dialed addresses. + addresses: Vec, + }, + + /// Substream opened for `peer`. + SubstreamOpened { + /// Peer ID. + peer: PeerId, + + /// Protocol name. + /// + /// One protocol handler may handle multiple sub-protocols (such as `/ipfs/identify/1.0.0` + /// and `/ipfs/identify/push/1.0.0`) or it may have aliases which should be handled by + /// the same protocol handler. When the substream is sent from transport to the protocol + /// handler, the protocol name that was used to negotiate the substream is also sent so + /// the protocol can handle the substream appropriately. + protocol: ProtocolName, + + /// Fallback name. + /// + /// If the substream was negotiated using a fallback name of the main protocol, + /// `fallback` is `Some`. + fallback: Option, + + /// Substream direction. + /// + /// Informs the protocol whether the substream is inbound (opened by the remote node) + /// or outbound (opened by the local node). This allows the protocol to distinguish + /// between the two types of substreams and execute correct code for the substream. + /// + /// Outbound substreams also contain the substream ID which allows the protocol to + /// distinguish between different outbound substreams. + direction: Direction, + + /// Connection ID. + connection_id: ConnectionId, + + /// Substream. + substream: Substream, + + /// Permit that was held while this substream was opening. Must be dropped by + /// [`TransportService`](crate::protocol::TransportService) once connection is upgraded. + opening_permit: Permit, + }, + + /// Failed to open substream. + /// + /// Substream open failures are reported only for outbound substreams. + SubstreamOpenFailure { + /// Substream ID. + substream: SubstreamId, + + /// Error that occurred when the substream was being opened. + error: SubstreamError, + }, } impl From for TransportEvent { - fn from(event: InnerTransportEvent) -> Self { - match event { - InnerTransportEvent::DialFailure { peer, addresses } => - TransportEvent::DialFailure { peer, addresses }, - InnerTransportEvent::SubstreamOpened { - peer, - protocol, - fallback, - direction, - substream, - .. - } => TransportEvent::SubstreamOpened { - peer, - protocol, - fallback, - direction, - substream, - }, - InnerTransportEvent::SubstreamOpenFailure { substream, error } => - TransportEvent::SubstreamOpenFailure { substream, error }, - event => panic!("cannot convert {event:?}"), - } - } + fn from(event: InnerTransportEvent) -> Self { + match event { + InnerTransportEvent::DialFailure { peer, addresses } => + TransportEvent::DialFailure { peer, addresses }, + InnerTransportEvent::SubstreamOpened { + peer, + protocol, + fallback, + direction, + substream, + .. + } => TransportEvent::SubstreamOpened { peer, protocol, fallback, direction, substream }, + InnerTransportEvent::SubstreamOpenFailure { substream, error } => + TransportEvent::SubstreamOpenFailure { substream, error }, + event => panic!("cannot convert {event:?}"), + } + } } /// Events emitted by the installed protocols to transport. #[derive(Debug, Clone)] pub enum ProtocolCommand { - /// Open substream. - OpenSubstream { - /// Protocol name. - protocol: ProtocolName, - - /// Fallback names. - /// - /// If the protocol has changed its name but wishes to support the old name(s), it must - /// provide the old protocol names in `fallback_names`. These are fed into - /// `multistream-select` which them attempts to negotiate a protocol for the substream - /// using one of the provided names and if the substream is negotiated successfully, will - /// report back the actual protocol name that was negotiated, in case the protocol - /// needs to deal with the old version of the protocol in different way compared to - /// the new version. - fallback_names: Vec, - - /// Substream ID. - /// - /// Protocol allocates an ephemeral ID for outbound substreams which allows it to track - /// the state of its pending substream. The ID is given back to protocol in - /// [`TransportEvent::SubstreamOpened`]/[`TransportEvent::SubstreamOpenFailure`]. - /// - /// This allows the protocol to distinguish inbound substreams from outbound substreams - /// and associate incoming substreams with whatever logic it has. - substream_id: SubstreamId, - - /// Connection ID. - connection_id: ConnectionId, - - /// Connection permit. - /// - /// `Permit` allows the connection to be kept open while the permit is held and it is given - /// to the substream to hold once it has been opened. When the substream is dropped, the - /// permit is dropped and the connection may be closed if no other permit is being - /// held. - permit: Permit, - - /// Whether this susbtream should keep the connection alive until it exists. I.e., whether - /// it should store the permit above, or drop it once the substream is opened. - keep_alive: SubstreamKeepAlive, - }, - - /// Forcibly close the connection, even if other protocols have substreams open over it. - ForceClose, + /// Open substream. + OpenSubstream { + /// Protocol name. + protocol: ProtocolName, + + /// Fallback names. + /// + /// If the protocol has changed its name but wishes to support the old name(s), it must + /// provide the old protocol names in `fallback_names`. These are fed into + /// `multistream-select` which them attempts to negotiate a protocol for the substream + /// using one of the provided names and if the substream is negotiated successfully, will + /// report back the actual protocol name that was negotiated, in case the protocol + /// needs to deal with the old version of the protocol in different way compared to + /// the new version. + fallback_names: Vec, + + /// Substream ID. + /// + /// Protocol allocates an ephemeral ID for outbound substreams which allows it to track + /// the state of its pending substream. The ID is given back to protocol in + /// [`TransportEvent::SubstreamOpened`]/[`TransportEvent::SubstreamOpenFailure`]. + /// + /// This allows the protocol to distinguish inbound substreams from outbound substreams + /// and associate incoming substreams with whatever logic it has. + substream_id: SubstreamId, + + /// Connection ID. + connection_id: ConnectionId, + + /// Connection permit. + /// + /// `Permit` allows the connection to be kept open while the permit is held and it is given + /// to the substream to hold once it has been opened. When the substream is dropped, the + /// permit is dropped and the connection may be closed if no other permit is being + /// held. + permit: Permit, + + /// Whether this susbtream should keep the connection alive until it exists. I.e., whether + /// it should store the permit above, or drop it once the substream is opened. + keep_alive: SubstreamKeepAlive, + }, + + /// Forcibly close the connection, even if other protocols have substreams open over it. + ForceClose, } /// Supported protocol information. @@ -226,426 +220,416 @@ pub enum ProtocolCommand { /// Each connection gets a copy of [`ProtocolSet`] which allows it to interact /// directly with installed protocols. pub struct ProtocolSet { - /// Installed protocols, indexed by main protocol name. - pub(crate) protocols: HashMap, - mgr_tx: Sender, - connection: ConnectionHandle, - rx: Receiver, - #[allow(unused)] - next_substream_id: Arc, - /// Mapping `fallback_name` -> `main_name`. - fallback_names: HashMap, - /// Connection keep-alive settings for both main & fallback protocol names. - keep_alives: HashMap, + /// Installed protocols, indexed by main protocol name. + pub(crate) protocols: HashMap, + mgr_tx: Sender, + connection: ConnectionHandle, + rx: Receiver, + #[allow(unused)] + next_substream_id: Arc, + /// Mapping `fallback_name` -> `main_name`. + fallback_names: HashMap, + /// Connection keep-alive settings for both main & fallback protocol names. + keep_alives: HashMap, } impl ProtocolSet { - pub fn new( - connection_id: ConnectionId, - mgr_tx: Sender, - next_substream_id: Arc, - protocols: HashMap, - ) -> Self { - let (tx, rx) = channel(256); - - let fallback_names = protocols - .iter() - .flat_map(|(protocol, context)| { - context - .fallback_names - .iter() - .map(|fallback| (fallback.clone(), protocol.clone())) - .collect::>() - }) - .collect::>(); - - let main_keep_alives = protocols - .iter() - .map(|(name, context)| (name.clone(), context.keep_alive)) - .collect::>(); - let fallback_keep_alives = fallback_names - .iter() - .map(|(fallback, main)| { - ( - fallback.clone(), - protocols - .get(main) - .expect("all main protocols are present due to construction above; qed") - .keep_alive, - ) - }) - .collect::>(); - let keep_alives = main_keep_alives.into_iter().chain(fallback_keep_alives).collect(); - - ProtocolSet { - rx, - mgr_tx, - protocols, - next_substream_id, - fallback_names, - keep_alives, - connection: ConnectionHandle::new(connection_id, tx), - } - } - - /// Try to acquire permit to keep the connection open. - pub fn try_get_permit(&mut self) -> Option { - self.connection.try_get_permit() - } - - /// Get next substream ID. - #[cfg(any(feature = "quic", feature = "webrtc", feature = "websocket"))] - pub fn next_substream_id(&self) -> SubstreamId { - SubstreamId::from(self.next_substream_id.fetch_add(1usize, Ordering::Relaxed)) - } - - /// Get the list of all supported protocols. - #[cfg(test)] - pub fn protocols(&self) -> Vec { - self.protocols - .keys() - .cloned() - .chain(self.fallback_names.keys().cloned()) - .collect() - } - - /// Get the list of all supported protocols with corresponding keep-alive settings. - pub fn protocols_with_keep_alives(&self) -> HashMap { - self.keep_alives.clone() - } - - /// Report to `protocol` that substream was opened for `peer`. - pub async fn report_substream_open( - &mut self, - peer: PeerId, - protocol: ProtocolName, - direction: Direction, - substream: Substream, - opening_permit: Permit, - ) -> Result<(), SubstreamError> { - tracing::debug!(target: LOG_TARGET, %protocol, ?peer, ?direction, "substream opened"); - - let (protocol, fallback) = match self.fallback_names.get(&protocol) { - Some(main_protocol) => (main_protocol.clone(), Some(protocol)), - None => (protocol, None), - }; - - let Some(protocol_context) = self.protocols.get(&protocol) else { - return Err(NegotiationError::MultistreamSelectError( - MultiStreamNegotiationError::ProtocolError( - MultiStreamProtocolError::ProtocolNotSupported, - ), - ) - .into()); - }; - - let event = InnerTransportEvent::SubstreamOpened { - peer, - protocol: protocol.clone(), - fallback, - direction, - substream, - connection_id: *self.connection.connection_id(), - opening_permit, - }; - - protocol_context - .tx - .send(event) - .await - .map_err(|_| SubstreamError::ConnectionClosed) - } - - /// Get codec used by the protocol. - pub fn protocol_codec(&self, protocol: &ProtocolName) -> ProtocolCodec { - // NOTE: `protocol` must exist in `self.protocol` as it was negotiated - // using the protocols from this set - self.protocols - .get(self.fallback_names.get(protocol).map_or(protocol, |protocol| protocol)) - .expect("protocol to exist") - .codec - } - - /// Report to `protocol` that connection failed to open substream for `peer`. - pub async fn report_substream_open_failure( - &mut self, - protocol: ProtocolName, - substream: SubstreamId, - error: SubstreamError, - ) -> crate::Result<()> { - tracing::debug!( - target: LOG_TARGET, - %protocol, - ?substream, - ?error, - "failed to open substream", - ); - - self.protocols - .get_mut(&protocol) - .ok_or(Error::ProtocolNotSupported(protocol.to_string()))? - .tx - .send(InnerTransportEvent::SubstreamOpenFailure { substream, error }) - .await - .map_err(From::from) - } - - /// Report to protocols that a connection was established. - pub(crate) async fn report_connection_established( - &mut self, - peer: PeerId, - endpoint: Endpoint, - ) -> crate::Result<()> { - let connection_handle = self.connection.downgrade(); - let mut futures = self - .protocols - .values() - .map(|sender| { - let endpoint = endpoint.clone(); - let connection_handle = connection_handle.clone(); - - async move { - sender - .tx - .send(InnerTransportEvent::ConnectionEstablished { - peer, - connection: endpoint.connection_id(), - endpoint, - sender: connection_handle, - }) - .await - } - }) - .collect::>(); - - while !futures.is_empty() { - if let Some(Err(error)) = futures.next().await { - return Err(error.into()); - } - } - - Ok(()) - } - - /// Report to protocols that a connection was closed. - pub(crate) async fn report_connection_closed( - &mut self, - peer: PeerId, - connection_id: ConnectionId, - ) -> crate::Result<()> { - let mut futures = self - .protocols - .iter() - .map(|(protocol, sender)| async move { - sender - .tx - .send(InnerTransportEvent::ConnectionClosed { - peer, - connection: connection_id, - }) - .await - .inspect_err(|err| { - tracing::debug!( - target: LOG_TARGET, - %protocol, - ?peer, - ?connection_id, - ?err, - "failed to report connection closed to protocol", - ); - }) - }) - .collect::>(); - - // Capture the first error that occurs while reporting to protocols. - let mut protocol_error = None; - while !futures.is_empty() { - if let Some(Err(err)) = futures.next().await { - if protocol_error.is_none() { - protocol_error = Some(err.into()); - } - } - } - - // Ensure the manager receives the connection closed event. Otherwise, the - // manager will think the connection is still open, while the underlying - // protocols and raw connection are closed. - self.mgr_tx - .send(TransportManagerEvent::ConnectionClosed { - peer, - connection: connection_id, - }) - .await?; - - // If any protocol report failed, return that error now - match protocol_error { - Some(e) => Err(e), - None => Ok(()), - } - } + pub fn new( + connection_id: ConnectionId, + mgr_tx: Sender, + next_substream_id: Arc, + protocols: HashMap, + ) -> Self { + let (tx, rx) = channel(256); + + let fallback_names = protocols + .iter() + .flat_map(|(protocol, context)| { + context + .fallback_names + .iter() + .map(|fallback| (fallback.clone(), protocol.clone())) + .collect::>() + }) + .collect::>(); + + let main_keep_alives = protocols + .iter() + .map(|(name, context)| (name.clone(), context.keep_alive)) + .collect::>(); + let fallback_keep_alives = fallback_names + .iter() + .map(|(fallback, main)| { + ( + fallback.clone(), + protocols + .get(main) + .expect("all main protocols are present due to construction above; qed") + .keep_alive, + ) + }) + .collect::>(); + let keep_alives = main_keep_alives.into_iter().chain(fallback_keep_alives).collect(); + + ProtocolSet { + rx, + mgr_tx, + protocols, + next_substream_id, + fallback_names, + keep_alives, + connection: ConnectionHandle::new(connection_id, tx), + } + } + + /// Try to acquire permit to keep the connection open. + pub fn try_get_permit(&mut self) -> Option { + self.connection.try_get_permit() + } + + /// Get next substream ID. + #[cfg(any(feature = "quic", feature = "webrtc", feature = "websocket"))] + pub fn next_substream_id(&self) -> SubstreamId { + SubstreamId::from(self.next_substream_id.fetch_add(1usize, Ordering::Relaxed)) + } + + /// Get the list of all supported protocols. + #[cfg(test)] + pub fn protocols(&self) -> Vec { + self.protocols + .keys() + .cloned() + .chain(self.fallback_names.keys().cloned()) + .collect() + } + + /// Get the list of all supported protocols with corresponding keep-alive settings. + pub fn protocols_with_keep_alives(&self) -> HashMap { + self.keep_alives.clone() + } + + /// Report to `protocol` that substream was opened for `peer`. + pub async fn report_substream_open( + &mut self, + peer: PeerId, + protocol: ProtocolName, + direction: Direction, + substream: Substream, + opening_permit: Permit, + ) -> Result<(), SubstreamError> { + tracing::debug!(target: LOG_TARGET, %protocol, ?peer, ?direction, "substream opened"); + + let (protocol, fallback) = match self.fallback_names.get(&protocol) { + Some(main_protocol) => (main_protocol.clone(), Some(protocol)), + None => (protocol, None), + }; + + let Some(protocol_context) = self.protocols.get(&protocol) else { + return Err(NegotiationError::MultistreamSelectError( + MultiStreamNegotiationError::ProtocolError( + MultiStreamProtocolError::ProtocolNotSupported, + ), + ) + .into()); + }; + + let event = InnerTransportEvent::SubstreamOpened { + peer, + protocol: protocol.clone(), + fallback, + direction, + substream, + connection_id: *self.connection.connection_id(), + opening_permit, + }; + + protocol_context + .tx + .send(event) + .await + .map_err(|_| SubstreamError::ConnectionClosed) + } + + /// Get codec used by the protocol. + pub fn protocol_codec(&self, protocol: &ProtocolName) -> ProtocolCodec { + // NOTE: `protocol` must exist in `self.protocol` as it was negotiated + // using the protocols from this set + self.protocols + .get(self.fallback_names.get(protocol).map_or(protocol, |protocol| protocol)) + .expect("protocol to exist") + .codec + } + + /// Report to `protocol` that connection failed to open substream for `peer`. + pub async fn report_substream_open_failure( + &mut self, + protocol: ProtocolName, + substream: SubstreamId, + error: SubstreamError, + ) -> crate::Result<()> { + tracing::debug!( + target: LOG_TARGET, + %protocol, + ?substream, + ?error, + "failed to open substream", + ); + + self.protocols + .get_mut(&protocol) + .ok_or(Error::ProtocolNotSupported(protocol.to_string()))? + .tx + .send(InnerTransportEvent::SubstreamOpenFailure { substream, error }) + .await + .map_err(From::from) + } + + /// Report to protocols that a connection was established. + pub(crate) async fn report_connection_established( + &mut self, + peer: PeerId, + endpoint: Endpoint, + ) -> crate::Result<()> { + let connection_handle = self.connection.downgrade(); + let mut futures = self + .protocols + .values() + .map(|sender| { + let endpoint = endpoint.clone(); + let connection_handle = connection_handle.clone(); + + async move { + sender + .tx + .send(InnerTransportEvent::ConnectionEstablished { + peer, + connection: endpoint.connection_id(), + endpoint, + sender: connection_handle, + }) + .await + } + }) + .collect::>(); + + while !futures.is_empty() { + if let Some(Err(error)) = futures.next().await { + return Err(error.into()); + } + } + + Ok(()) + } + + /// Report to protocols that a connection was closed. + pub(crate) async fn report_connection_closed( + &mut self, + peer: PeerId, + connection_id: ConnectionId, + ) -> crate::Result<()> { + let mut futures = self + .protocols + .iter() + .map(|(protocol, sender)| async move { + sender + .tx + .send(InnerTransportEvent::ConnectionClosed { peer, connection: connection_id }) + .await + .inspect_err(|err| { + tracing::debug!( + target: LOG_TARGET, + %protocol, + ?peer, + ?connection_id, + ?err, + "failed to report connection closed to protocol", + ); + }) + }) + .collect::>(); + + // Capture the first error that occurs while reporting to protocols. + let mut protocol_error = None; + while !futures.is_empty() { + if let Some(Err(err)) = futures.next().await { + if protocol_error.is_none() { + protocol_error = Some(err.into()); + } + } + } + + // Ensure the manager receives the connection closed event. Otherwise, the + // manager will think the connection is still open, while the underlying + // protocols and raw connection are closed. + self.mgr_tx + .send(TransportManagerEvent::ConnectionClosed { peer, connection: connection_id }) + .await?; + + // If any protocol report failed, return that error now + match protocol_error { + Some(e) => Err(e), + None => Ok(()), + } + } } impl Stream for ProtocolSet { - type Item = ProtocolCommand; + type Item = ProtocolCommand; - fn poll_next(mut self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll> { - self.rx.poll_recv(cx) - } + fn poll_next(mut self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll> { + self.rx.poll_recv(cx) + } } #[cfg(test)] mod tests { - use super::*; - use crate::mock::substream::MockSubstream; - use std::collections::HashSet; - - #[tokio::test] - async fn fallback_is_provided() { - let (tx, _rx) = channel(64); - let (tx1, _rx1) = channel(64); - - let mut protocol_set = ProtocolSet::new( - ConnectionId::from(0usize), - tx, - Default::default(), - HashMap::from_iter([( - ProtocolName::from("/notif/1"), - ProtocolContext { - tx: tx1, - codec: ProtocolCodec::Identity(32), - fallback_names: vec![ - ProtocolName::from("/notif/1/fallback/1"), - ProtocolName::from("/notif/1/fallback/2"), - ], - keep_alive: SubstreamKeepAlive::Yes, - }, - )]), - ); - - let expected_protocols = HashSet::from([ - ProtocolName::from("/notif/1"), - ProtocolName::from("/notif/1/fallback/1"), - ProtocolName::from("/notif/1/fallback/2"), - ]); - - for protocol in protocol_set.protocols().iter() { - assert!(expected_protocols.contains(protocol)); - } - - let permit = protocol_set.try_get_permit().unwrap(); - protocol_set - .report_substream_open( - PeerId::random(), - ProtocolName::from("/notif/1/fallback/2"), - Direction::Inbound, - Substream::new_mock( - PeerId::random(), - SubstreamId::from(0usize), - Box::new(MockSubstream::new()), - ), - permit, - ) - .await - .unwrap(); - } - - #[tokio::test] - async fn main_protocol_reported_if_main_protocol_negotiated() { - let (tx, _rx) = channel(64); - let (tx1, mut rx1) = channel(64); - - let mut protocol_set = ProtocolSet::new( - ConnectionId::from(0usize), - tx, - Default::default(), - HashMap::from_iter([( - ProtocolName::from("/notif/1"), - ProtocolContext { - tx: tx1, - codec: ProtocolCodec::Identity(32), - fallback_names: vec![ - ProtocolName::from("/notif/1/fallback/1"), - ProtocolName::from("/notif/1/fallback/2"), - ], - keep_alive: SubstreamKeepAlive::Yes, - }, - )]), - ); - - let permit = protocol_set.try_get_permit().unwrap(); - protocol_set - .report_substream_open( - PeerId::random(), - ProtocolName::from("/notif/1"), - Direction::Inbound, - Substream::new_mock( - PeerId::random(), - SubstreamId::from(0usize), - Box::new(MockSubstream::new()), - ), - permit, - ) - .await - .unwrap(); - - match rx1.recv().await.unwrap() { - InnerTransportEvent::SubstreamOpened { - protocol, fallback, .. - } => { - assert!(fallback.is_none()); - assert_eq!(protocol, ProtocolName::from("/notif/1")); - } - _ => panic!("invalid event received"), - } - } - - #[tokio::test] - async fn fallback_is_reported_to_protocol() { - let (tx, _rx) = channel(64); - let (tx1, mut rx1) = channel(64); - - let mut protocol_set = ProtocolSet::new( - ConnectionId::from(0usize), - tx, - Default::default(), - HashMap::from_iter([( - ProtocolName::from("/notif/1"), - ProtocolContext { - tx: tx1, - codec: ProtocolCodec::Identity(32), - fallback_names: vec![ - ProtocolName::from("/notif/1/fallback/1"), - ProtocolName::from("/notif/1/fallback/2"), - ], - keep_alive: SubstreamKeepAlive::Yes, - }, - )]), - ); - - let permit = protocol_set.try_get_permit().unwrap(); - protocol_set - .report_substream_open( - PeerId::random(), - ProtocolName::from("/notif/1/fallback/2"), - Direction::Inbound, - Substream::new_mock( - PeerId::random(), - SubstreamId::from(0usize), - Box::new(MockSubstream::new()), - ), - permit, - ) - .await - .unwrap(); - - match rx1.recv().await.unwrap() { - InnerTransportEvent::SubstreamOpened { - protocol, fallback, .. - } => { - assert_eq!(fallback, Some(ProtocolName::from("/notif/1/fallback/2"))); - assert_eq!(protocol, ProtocolName::from("/notif/1")); - } - _ => panic!("invalid event received"), - } - } + use super::*; + use crate::mock::substream::MockSubstream; + use std::collections::HashSet; + + #[tokio::test] + async fn fallback_is_provided() { + let (tx, _rx) = channel(64); + let (tx1, _rx1) = channel(64); + + let mut protocol_set = ProtocolSet::new( + ConnectionId::from(0usize), + tx, + Default::default(), + HashMap::from_iter([( + ProtocolName::from("/notif/1"), + ProtocolContext { + tx: tx1, + codec: ProtocolCodec::Identity(32), + fallback_names: vec![ + ProtocolName::from("/notif/1/fallback/1"), + ProtocolName::from("/notif/1/fallback/2"), + ], + keep_alive: SubstreamKeepAlive::Yes, + }, + )]), + ); + + let expected_protocols = HashSet::from([ + ProtocolName::from("/notif/1"), + ProtocolName::from("/notif/1/fallback/1"), + ProtocolName::from("/notif/1/fallback/2"), + ]); + + for protocol in protocol_set.protocols().iter() { + assert!(expected_protocols.contains(protocol)); + } + + let permit = protocol_set.try_get_permit().unwrap(); + protocol_set + .report_substream_open( + PeerId::random(), + ProtocolName::from("/notif/1/fallback/2"), + Direction::Inbound, + Substream::new_mock( + PeerId::random(), + SubstreamId::from(0usize), + Box::new(MockSubstream::new()), + ), + permit, + ) + .await + .unwrap(); + } + + #[tokio::test] + async fn main_protocol_reported_if_main_protocol_negotiated() { + let (tx, _rx) = channel(64); + let (tx1, mut rx1) = channel(64); + + let mut protocol_set = ProtocolSet::new( + ConnectionId::from(0usize), + tx, + Default::default(), + HashMap::from_iter([( + ProtocolName::from("/notif/1"), + ProtocolContext { + tx: tx1, + codec: ProtocolCodec::Identity(32), + fallback_names: vec![ + ProtocolName::from("/notif/1/fallback/1"), + ProtocolName::from("/notif/1/fallback/2"), + ], + keep_alive: SubstreamKeepAlive::Yes, + }, + )]), + ); + + let permit = protocol_set.try_get_permit().unwrap(); + protocol_set + .report_substream_open( + PeerId::random(), + ProtocolName::from("/notif/1"), + Direction::Inbound, + Substream::new_mock( + PeerId::random(), + SubstreamId::from(0usize), + Box::new(MockSubstream::new()), + ), + permit, + ) + .await + .unwrap(); + + match rx1.recv().await.unwrap() { + InnerTransportEvent::SubstreamOpened { protocol, fallback, .. } => { + assert!(fallback.is_none()); + assert_eq!(protocol, ProtocolName::from("/notif/1")); + }, + _ => panic!("invalid event received"), + } + } + + #[tokio::test] + async fn fallback_is_reported_to_protocol() { + let (tx, _rx) = channel(64); + let (tx1, mut rx1) = channel(64); + + let mut protocol_set = ProtocolSet::new( + ConnectionId::from(0usize), + tx, + Default::default(), + HashMap::from_iter([( + ProtocolName::from("/notif/1"), + ProtocolContext { + tx: tx1, + codec: ProtocolCodec::Identity(32), + fallback_names: vec![ + ProtocolName::from("/notif/1/fallback/1"), + ProtocolName::from("/notif/1/fallback/2"), + ], + keep_alive: SubstreamKeepAlive::Yes, + }, + )]), + ); + + let permit = protocol_set.try_get_permit().unwrap(); + protocol_set + .report_substream_open( + PeerId::random(), + ProtocolName::from("/notif/1/fallback/2"), + Direction::Inbound, + Substream::new_mock( + PeerId::random(), + SubstreamId::from(0usize), + Box::new(MockSubstream::new()), + ), + permit, + ) + .await + .unwrap(); + + match rx1.recv().await.unwrap() { + InnerTransportEvent::SubstreamOpened { protocol, fallback, .. } => { + assert_eq!(fallback, Some(ProtocolName::from("/notif/1/fallback/2"))); + assert_eq!(protocol, ProtocolName::from("/notif/1")); + }, + _ => panic!("invalid event received"), + } + } } diff --git a/client/litep2p/src/protocol/request_response/config.rs b/client/litep2p/src/protocol/request_response/config.rs index a44b1238..ca02ca7e 100644 --- a/client/litep2p/src/protocol/request_response/config.rs +++ b/client/litep2p/src/protocol/request_response/config.rs @@ -19,153 +19,153 @@ // DEALINGS IN THE SOFTWARE. use crate::{ - codec::ProtocolCodec, - protocol::request_response::{ - handle::{InnerRequestResponseEvent, RequestResponseCommand, RequestResponseHandle}, - REQUEST_TIMEOUT, - }, - types::protocol::ProtocolName, - DEFAULT_CHANNEL_SIZE, + codec::ProtocolCodec, + protocol::request_response::{ + handle::{InnerRequestResponseEvent, RequestResponseCommand, RequestResponseHandle}, + REQUEST_TIMEOUT, + }, + types::protocol::ProtocolName, + DEFAULT_CHANNEL_SIZE, }; use tokio::sync::mpsc::{channel, Receiver, Sender}; use std::{ - sync::{atomic::AtomicUsize, Arc}, - time::Duration, + sync::{atomic::AtomicUsize, Arc}, + time::Duration, }; /// Request-response protocol configuration. pub struct Config { - /// Protocol name. - pub(crate) protocol_name: ProtocolName, + /// Protocol name. + pub(crate) protocol_name: ProtocolName, - /// Fallback names for the main protocol name. - pub(crate) fallback_names: Vec, + /// Fallback names for the main protocol name. + pub(crate) fallback_names: Vec, - /// Timeout for outbound requests. - pub(crate) timeout: Duration, + /// Timeout for outbound requests. + pub(crate) timeout: Duration, - /// Codec used by the protocol. - pub(crate) codec: ProtocolCodec, + /// Codec used by the protocol. + pub(crate) codec: ProtocolCodec, - /// TX channel for sending events to the user protocol. - pub(super) event_tx: Sender, + /// TX channel for sending events to the user protocol. + pub(super) event_tx: Sender, - /// RX channel for receiving commands from the user protocol. - pub(crate) command_rx: Receiver, + /// RX channel for receiving commands from the user protocol. + pub(crate) command_rx: Receiver, - /// Next ephemeral request ID. - pub(crate) next_request_id: Arc, + /// Next ephemeral request ID. + pub(crate) next_request_id: Arc, - /// Maximum number of concurrent inbound requests. - pub(crate) max_concurrent_inbound_request: Option, + /// Maximum number of concurrent inbound requests. + pub(crate) max_concurrent_inbound_request: Option, } impl Config { - /// Create new [`Config`]. - pub fn new( - protocol_name: ProtocolName, - fallback_names: Vec, - max_message_size: usize, - timeout: Duration, - max_concurrent_inbound_request: Option, - ) -> (Self, RequestResponseHandle) { - let (event_tx, event_rx) = channel(DEFAULT_CHANNEL_SIZE); - let (command_tx, command_rx) = channel(DEFAULT_CHANNEL_SIZE); - let next_request_id = Default::default(); - let handle = RequestResponseHandle::new(event_rx, command_tx, Arc::clone(&next_request_id)); - - ( - Self { - event_tx, - command_rx, - protocol_name, - fallback_names, - next_request_id, - timeout, - max_concurrent_inbound_request, - codec: ProtocolCodec::UnsignedVarint(Some(max_message_size)), - }, - handle, - ) - } - - /// Get protocol name. - pub(crate) fn protocol_name(&self) -> &ProtocolName { - &self.protocol_name - } + /// Create new [`Config`]. + pub fn new( + protocol_name: ProtocolName, + fallback_names: Vec, + max_message_size: usize, + timeout: Duration, + max_concurrent_inbound_request: Option, + ) -> (Self, RequestResponseHandle) { + let (event_tx, event_rx) = channel(DEFAULT_CHANNEL_SIZE); + let (command_tx, command_rx) = channel(DEFAULT_CHANNEL_SIZE); + let next_request_id = Default::default(); + let handle = RequestResponseHandle::new(event_rx, command_tx, Arc::clone(&next_request_id)); + + ( + Self { + event_tx, + command_rx, + protocol_name, + fallback_names, + next_request_id, + timeout, + max_concurrent_inbound_request, + codec: ProtocolCodec::UnsignedVarint(Some(max_message_size)), + }, + handle, + ) + } + + /// Get protocol name. + pub(crate) fn protocol_name(&self) -> &ProtocolName { + &self.protocol_name + } } /// Builder for [`Config`]. pub struct ConfigBuilder { - /// Protocol name. - pub(crate) protocol_name: ProtocolName, + /// Protocol name. + pub(crate) protocol_name: ProtocolName, - /// Fallback names for the main protocol name. - pub(crate) fallback_names: Vec, + /// Fallback names for the main protocol name. + pub(crate) fallback_names: Vec, - /// Maximum message size. - max_message_size: Option, + /// Maximum message size. + max_message_size: Option, - /// Timeout for outbound requests. - timeout: Option, + /// Timeout for outbound requests. + timeout: Option, - /// Maximum number of concurrent inbound requests. - max_concurrent_inbound_request: Option, + /// Maximum number of concurrent inbound requests. + max_concurrent_inbound_request: Option, } impl ConfigBuilder { - /// Create new [`ConfigBuilder`]. - pub fn new(protocol_name: ProtocolName) -> Self { - Self { - protocol_name, - fallback_names: Vec::new(), - max_message_size: None, - timeout: Some(REQUEST_TIMEOUT), - max_concurrent_inbound_request: None, - } - } - - /// Set maximum message size. - pub fn with_max_size(mut self, max_message_size: usize) -> Self { - self.max_message_size = Some(max_message_size); - self - } - - /// Set fallback names. - pub fn with_fallback_names(mut self, fallback_names: Vec) -> Self { - self.fallback_names = fallback_names; - self - } - - /// Set timeout for outbound requests. - pub fn with_timeout(mut self, timeout: Duration) -> Self { - self.timeout = Some(timeout); - self - } - - /// Specify the maximum number of concurrent inbound requests. By default the number of inbound - /// requests is not limited. - /// - /// If a new request is received while the number of inbound requests is already at a maximum, - /// the request is dropped. - pub fn with_max_concurrent_inbound_requests( - mut self, - max_concurrent_inbound_requests: usize, - ) -> Self { - self.max_concurrent_inbound_request = Some(max_concurrent_inbound_requests); - self - } - - /// Build [`Config`]. - pub fn build(mut self) -> (Config, RequestResponseHandle) { - Config::new( - self.protocol_name, - self.fallback_names, - self.max_message_size.take().expect("maximum message size to be set"), - self.timeout.take().expect("timeout to exist"), - self.max_concurrent_inbound_request, - ) - } + /// Create new [`ConfigBuilder`]. + pub fn new(protocol_name: ProtocolName) -> Self { + Self { + protocol_name, + fallback_names: Vec::new(), + max_message_size: None, + timeout: Some(REQUEST_TIMEOUT), + max_concurrent_inbound_request: None, + } + } + + /// Set maximum message size. + pub fn with_max_size(mut self, max_message_size: usize) -> Self { + self.max_message_size = Some(max_message_size); + self + } + + /// Set fallback names. + pub fn with_fallback_names(mut self, fallback_names: Vec) -> Self { + self.fallback_names = fallback_names; + self + } + + /// Set timeout for outbound requests. + pub fn with_timeout(mut self, timeout: Duration) -> Self { + self.timeout = Some(timeout); + self + } + + /// Specify the maximum number of concurrent inbound requests. By default the number of inbound + /// requests is not limited. + /// + /// If a new request is received while the number of inbound requests is already at a maximum, + /// the request is dropped. + pub fn with_max_concurrent_inbound_requests( + mut self, + max_concurrent_inbound_requests: usize, + ) -> Self { + self.max_concurrent_inbound_request = Some(max_concurrent_inbound_requests); + self + } + + /// Build [`Config`]. + pub fn build(mut self) -> (Config, RequestResponseHandle) { + Config::new( + self.protocol_name, + self.fallback_names, + self.max_message_size.take().expect("maximum message size to be set"), + self.timeout.take().expect("timeout to exist"), + self.max_concurrent_inbound_request, + ) + } } diff --git a/client/litep2p/src/protocol/request_response/handle.rs b/client/litep2p/src/protocol/request_response/handle.rs index 5f1cc162..b9d517cb 100644 --- a/client/litep2p/src/protocol/request_response/handle.rs +++ b/client/litep2p/src/protocol/request_response/handle.rs @@ -19,27 +19,27 @@ // DEALINGS IN THE SOFTWARE. use crate::{ - error::{ImmediateDialError, SubstreamError}, - multistream_select::ProtocolError, - types::{protocol::ProtocolName, RequestId}, - Error, PeerId, + error::{ImmediateDialError, SubstreamError}, + multistream_select::ProtocolError, + types::{protocol::ProtocolName, RequestId}, + Error, PeerId, }; use futures::channel; use tokio::sync::{ - mpsc::{Receiver, Sender}, - oneshot, + mpsc::{Receiver, Sender}, + oneshot, }; use std::{ - collections::HashMap, - io::ErrorKind, - pin::Pin, - sync::{ - atomic::{AtomicUsize, Ordering}, - Arc, - }, - task::{Context, Poll}, + collections::HashMap, + io::ErrorKind, + pin::Pin, + sync::{ + atomic::{AtomicUsize, Ordering}, + Arc, + }, + task::{Context, Poll}, }; /// Logging target for the file. @@ -48,523 +48,501 @@ const LOG_TARGET: &str = "litep2p::request-response::handle"; /// Request-response error. #[derive(Debug, PartialEq)] pub enum RequestResponseError { - /// Request was rejected. - Rejected(RejectReason), + /// Request was rejected. + Rejected(RejectReason), - /// Request was canceled by the local node. - Canceled, + /// Request was canceled by the local node. + Canceled, - /// Request timed out. - Timeout, + /// Request timed out. + Timeout, - /// The peer is not connected and the dialing option was [`DialOptions::Reject`]. - NotConnected, + /// The peer is not connected and the dialing option was [`DialOptions::Reject`]. + NotConnected, - /// Too large payload. - TooLargePayload, + /// Too large payload. + TooLargePayload, - /// Protocol not supported. - UnsupportedProtocol, + /// Protocol not supported. + UnsupportedProtocol, } /// The reason why a request was rejected. #[derive(Debug, PartialEq)] pub enum RejectReason { - /// Substream error. - SubstreamOpenError(SubstreamError), - - /// The peer disconnected before the request was processed. - ConnectionClosed, - - /// The substream was closed before the request was processed. - SubstreamClosed, - - /// The dial failed. - /// - /// If the dial failure is immediate, the error is included. - /// - /// If the dialing process is happening in parallel on multiple - /// addresses (potentially with multiple protocols), the dialing - /// process is not considered immediate and the given errors are not - /// propagated for simplicity. - DialFailed(Option), + /// Substream error. + SubstreamOpenError(SubstreamError), + + /// The peer disconnected before the request was processed. + ConnectionClosed, + + /// The substream was closed before the request was processed. + SubstreamClosed, + + /// The dial failed. + /// + /// If the dial failure is immediate, the error is included. + /// + /// If the dialing process is happening in parallel on multiple + /// addresses (potentially with multiple protocols), the dialing + /// process is not considered immediate and the given errors are not + /// propagated for simplicity. + DialFailed(Option), } impl From for RejectReason { - fn from(error: SubstreamError) -> Self { - // Convert `ErrorKind::NotConnected` to `RejectReason::ConnectionClosed`. - match error { - SubstreamError::IoError(ErrorKind::NotConnected) => RejectReason::ConnectionClosed, - SubstreamError::YamuxError(crate::yamux::ConnectionError::Io(error), _) - if error.kind() == ErrorKind::NotConnected => - RejectReason::ConnectionClosed, - SubstreamError::NegotiationError(crate::error::NegotiationError::IoError( - ErrorKind::NotConnected, - )) => RejectReason::ConnectionClosed, - SubstreamError::NegotiationError( - crate::error::NegotiationError::MultistreamSelectError( - crate::multistream_select::NegotiationError::ProtocolError( - ProtocolError::IoError(error), - ), - ), - ) if error.kind() == ErrorKind::NotConnected => RejectReason::ConnectionClosed, - error => RejectReason::SubstreamOpenError(error), - } - } + fn from(error: SubstreamError) -> Self { + // Convert `ErrorKind::NotConnected` to `RejectReason::ConnectionClosed`. + match error { + SubstreamError::IoError(ErrorKind::NotConnected) => RejectReason::ConnectionClosed, + SubstreamError::YamuxError(crate::yamux::ConnectionError::Io(error), _) + if error.kind() == ErrorKind::NotConnected => + RejectReason::ConnectionClosed, + SubstreamError::NegotiationError(crate::error::NegotiationError::IoError( + ErrorKind::NotConnected, + )) => RejectReason::ConnectionClosed, + SubstreamError::NegotiationError( + crate::error::NegotiationError::MultistreamSelectError( + crate::multistream_select::NegotiationError::ProtocolError( + ProtocolError::IoError(error), + ), + ), + ) if error.kind() == ErrorKind::NotConnected => RejectReason::ConnectionClosed, + error => RejectReason::SubstreamOpenError(error), + } + } } /// Request-response events. #[derive(Debug)] pub(super) enum InnerRequestResponseEvent { - /// Request received from remote - RequestReceived { - /// Peer Id. - peer: PeerId, + /// Request received from remote + RequestReceived { + /// Peer Id. + peer: PeerId, - /// Fallback protocol, if the substream was negotiated using a fallback. - fallback: Option, + /// Fallback protocol, if the substream was negotiated using a fallback. + fallback: Option, - /// Request ID. - request_id: RequestId, + /// Request ID. + request_id: RequestId, - /// Received request. - request: Vec, + /// Received request. + request: Vec, - /// `oneshot::Sender` for response. - response_tx: oneshot::Sender<(Vec, Option>)>, - }, + /// `oneshot::Sender` for response. + response_tx: oneshot::Sender<(Vec, Option>)>, + }, - /// Response received. - ResponseReceived { - /// Peer Id. - peer: PeerId, + /// Response received. + ResponseReceived { + /// Peer Id. + peer: PeerId, - /// Fallback protocol, if the substream was negotiated using a fallback. - fallback: Option, + /// Fallback protocol, if the substream was negotiated using a fallback. + fallback: Option, - /// Request ID. - request_id: RequestId, + /// Request ID. + request_id: RequestId, - /// Received request. - response: Vec, - }, + /// Received request. + response: Vec, + }, - /// Request failed. - RequestFailed { - /// Peer Id. - peer: PeerId, + /// Request failed. + RequestFailed { + /// Peer Id. + peer: PeerId, - /// Request ID. - request_id: RequestId, + /// Request ID. + request_id: RequestId, - /// Request-response error. - error: RequestResponseError, - }, + /// Request-response error. + error: RequestResponseError, + }, } impl From for RequestResponseEvent { - fn from(event: InnerRequestResponseEvent) -> Self { - match event { - InnerRequestResponseEvent::ResponseReceived { - peer, - request_id, - response, - fallback, - } => RequestResponseEvent::ResponseReceived { - peer, - request_id, - response, - fallback, - }, - InnerRequestResponseEvent::RequestFailed { - peer, - request_id, - error, - } => RequestResponseEvent::RequestFailed { - peer, - request_id, - error, - }, - _ => panic!("unhandled event"), - } - } + fn from(event: InnerRequestResponseEvent) -> Self { + match event { + InnerRequestResponseEvent::ResponseReceived { + peer, + request_id, + response, + fallback, + } => RequestResponseEvent::ResponseReceived { peer, request_id, response, fallback }, + InnerRequestResponseEvent::RequestFailed { peer, request_id, error } => + RequestResponseEvent::RequestFailed { peer, request_id, error }, + _ => panic!("unhandled event"), + } + } } /// Request-response events. #[derive(Debug, PartialEq)] pub enum RequestResponseEvent { - /// Request received from remote - RequestReceived { - /// Peer Id. - peer: PeerId, - - /// Fallback protocol, if the substream was negotiated using a fallback. - fallback: Option, - - /// Request ID. - /// - /// While `request_id` is guaranteed to be unique for this protocols, the request IDs are - /// not unique across different request-response protocols, meaning two different - /// request-response protocols can both assign `RequestId(123)` for any given request. - request_id: RequestId, - - /// Received request. - request: Vec, - }, - - /// Response received. - ResponseReceived { - /// Peer Id. - peer: PeerId, - - /// Request ID. - request_id: RequestId, - - /// Fallback protocol, if the substream was negotiated using a fallback. - fallback: Option, - - /// Received request. - response: Vec, - }, - - /// Request failed. - RequestFailed { - /// Peer Id. - peer: PeerId, - - /// Request ID. - request_id: RequestId, - - /// Request-response error. - error: RequestResponseError, - }, + /// Request received from remote + RequestReceived { + /// Peer Id. + peer: PeerId, + + /// Fallback protocol, if the substream was negotiated using a fallback. + fallback: Option, + + /// Request ID. + /// + /// While `request_id` is guaranteed to be unique for this protocols, the request IDs are + /// not unique across different request-response protocols, meaning two different + /// request-response protocols can both assign `RequestId(123)` for any given request. + request_id: RequestId, + + /// Received request. + request: Vec, + }, + + /// Response received. + ResponseReceived { + /// Peer Id. + peer: PeerId, + + /// Request ID. + request_id: RequestId, + + /// Fallback protocol, if the substream was negotiated using a fallback. + fallback: Option, + + /// Received request. + response: Vec, + }, + + /// Request failed. + RequestFailed { + /// Peer Id. + peer: PeerId, + + /// Request ID. + request_id: RequestId, + + /// Request-response error. + error: RequestResponseError, + }, } /// Dial behavior when sending requests. #[derive(Debug)] #[cfg_attr(feature = "fuzz", derive(serde::Serialize, serde::Deserialize))] pub enum DialOptions { - /// If the peer is not currently connected, attempt to dial them before sending a request. - /// - /// If the dial succeeds, the request is sent to the peer once the peer has been registered - /// to the protocol. - /// - /// If the dial fails, [`RequestResponseError::Rejected`] is returned. - Dial, - - /// If the peer is not connected, immediately reject the request and return - /// [`RequestResponseError::NotConnected`]. - Reject, + /// If the peer is not currently connected, attempt to dial them before sending a request. + /// + /// If the dial succeeds, the request is sent to the peer once the peer has been registered + /// to the protocol. + /// + /// If the dial fails, [`RequestResponseError::Rejected`] is returned. + Dial, + + /// If the peer is not connected, immediately reject the request and return + /// [`RequestResponseError::NotConnected`]. + Reject, } /// Request-response commands. #[derive(Debug)] #[cfg_attr(feature = "fuzz", derive(serde::Serialize, serde::Deserialize))] pub enum RequestResponseCommand { - /// Send request to remote peer. - SendRequest { - /// Peer ID. - peer: PeerId, - - /// Request ID. - /// - /// When a response is received or the request fails, the event contains this ID that - /// the user protocol can associate with the correct request. - /// - /// If the user protocol only has one active request per peer, this ID can be safely - /// discarded. - request_id: RequestId, - - /// Request. - request: Vec, - - /// Dial options, see [`DialOptions`] for more details. - dial_options: DialOptions, - }, - - SendRequestWithFallback { - /// Peer ID. - peer: PeerId, - - /// Request ID. - request_id: RequestId, - - /// Request that is sent over the main protocol, if negotiated. - request: Vec, - - /// Request that is sent over the fallback protocol, if negotiated. - fallback: (ProtocolName, Vec), - - /// Dial options, see [`DialOptions`] for more details. - dial_options: DialOptions, - }, - - /// Cancel outbound request. - CancelRequest { - /// Request ID. - request_id: RequestId, - }, + /// Send request to remote peer. + SendRequest { + /// Peer ID. + peer: PeerId, + + /// Request ID. + /// + /// When a response is received or the request fails, the event contains this ID that + /// the user protocol can associate with the correct request. + /// + /// If the user protocol only has one active request per peer, this ID can be safely + /// discarded. + request_id: RequestId, + + /// Request. + request: Vec, + + /// Dial options, see [`DialOptions`] for more details. + dial_options: DialOptions, + }, + + SendRequestWithFallback { + /// Peer ID. + peer: PeerId, + + /// Request ID. + request_id: RequestId, + + /// Request that is sent over the main protocol, if negotiated. + request: Vec, + + /// Request that is sent over the fallback protocol, if negotiated. + fallback: (ProtocolName, Vec), + + /// Dial options, see [`DialOptions`] for more details. + dial_options: DialOptions, + }, + + /// Cancel outbound request. + CancelRequest { + /// Request ID. + request_id: RequestId, + }, } /// Handle given to the user protocol which allows it to interact with the request-response /// protocol. pub struct RequestResponseHandle { - /// TX channel for sending commands to the request-response protocol. - event_rx: Receiver, + /// TX channel for sending commands to the request-response protocol. + event_rx: Receiver, - /// RX channel for receiving events from the request-response protocol. - command_tx: Sender, + /// RX channel for receiving events from the request-response protocol. + command_tx: Sender, - /// Pending responses. - pending_responses: - HashMap, Option>)>>, + /// Pending responses. + pending_responses: + HashMap, Option>)>>, - /// Next ephemeral request ID. - next_request_id: Arc, + /// Next ephemeral request ID. + next_request_id: Arc, } impl RequestResponseHandle { - /// Create new [`RequestResponseHandle`]. - pub(super) fn new( - event_rx: Receiver, - command_tx: Sender, - next_request_id: Arc, - ) -> Self { - Self { - event_rx, - command_tx, - next_request_id, - pending_responses: HashMap::new(), - } - } - - #[cfg(feature = "fuzz")] - /// Expose functionality for fuzzing - pub async fn fuzz_send_message( - &mut self, - command: RequestResponseCommand, - ) -> crate::Result { - let request_id = self.next_request_id(); - self.command_tx.send(command).await.map(|_| request_id).map_err(From::from) - } - - /// Reject an inbound request. - /// - /// Reject request received from a remote peer. The substream is dropped which signals - /// to the remote peer that request was rejected. - pub fn reject_request(&mut self, request_id: RequestId) { - match self.pending_responses.remove(&request_id) { - None => { - tracing::debug!(target: LOG_TARGET, ?request_id, "rejected request doesn't exist") - } - Some(sender) => { - tracing::debug!(target: LOG_TARGET, ?request_id, "reject request"); - drop(sender); - } - } - } - - /// Cancel an outbound request. - /// - /// Allows canceling an in-flight request if the local node is not interested in the answer - /// anymore. If the request was canceled, no event is reported to the user as the cancelation - /// always succeeds and it's assumed that the user does the necessary state clean up in their - /// end after calling [`RequestResponseHandle::cancel_request()`]. - pub async fn cancel_request(&mut self, request_id: RequestId) { - tracing::trace!(target: LOG_TARGET, ?request_id, "cancel request"); - - let _ = self.command_tx.send(RequestResponseCommand::CancelRequest { request_id }).await; - } - - /// Get next request ID. - fn next_request_id(&self) -> RequestId { - let request_id = self.next_request_id.fetch_add(1usize, Ordering::Relaxed); - RequestId::from(request_id) - } - - /// Send request to remote peer. - /// - /// While the returned `RequestId` is guaranteed to be unique for this request-response - /// protocol, it's not unique across all installed request-response protocols. That is, - /// multiple request-response protocols can return the same `RequestId` and this must be - /// handled by the calling code correctly if the `RequestId`s are stored somewhere. - pub async fn send_request( - &mut self, - peer: PeerId, - request: Vec, - dial_options: DialOptions, - ) -> crate::Result { - tracing::trace!(target: LOG_TARGET, ?peer, "send request to peer"); - - let request_id = self.next_request_id(); - self.command_tx - .send(RequestResponseCommand::SendRequest { - peer, - request_id, - request, - dial_options, - }) - .await - .map(|_| request_id) - .map_err(From::from) - } - - /// Attempt to send request to peer and if the channel is clogged, return - /// `Error::ChannelClogged`. - /// - /// While the returned `RequestId` is guaranteed to be unique for this request-response - /// protocol, it's not unique across all installed request-response protocols. That is, - /// multiple request-response protocols can return the same `RequestId` and this must be - /// handled by the calling code correctly if the `RequestId`s are stored somewhere. - pub fn try_send_request( - &mut self, - peer: PeerId, - request: Vec, - dial_options: DialOptions, - ) -> crate::Result { - tracing::trace!(target: LOG_TARGET, ?peer, "send request to peer"); - - let request_id = self.next_request_id(); - self.command_tx - .try_send(RequestResponseCommand::SendRequest { - peer, - request_id, - request, - dial_options, - }) - .map(|_| request_id) - .map_err(|_| Error::ChannelClogged) - } - - /// Send request to remote peer with fallback. - pub async fn send_request_with_fallback( - &mut self, - peer: PeerId, - request: Vec, - fallback: (ProtocolName, Vec), - dial_options: DialOptions, - ) -> crate::Result { - tracing::trace!( - target: LOG_TARGET, - ?peer, - fallback = %fallback.0, - ?dial_options, - "send request with fallback to peer", - ); - - let request_id = self.next_request_id(); - self.command_tx - .send(RequestResponseCommand::SendRequestWithFallback { - peer, - request_id, - fallback, - request, - dial_options, - }) - .await - .map(|_| request_id) - .map_err(From::from) - } - - /// Attempt to send request to peer with fallback and if the channel is clogged, - /// return `Error::ChannelClogged`. - pub fn try_send_request_with_fallback( - &mut self, - peer: PeerId, - request: Vec, - fallback: (ProtocolName, Vec), - dial_options: DialOptions, - ) -> crate::Result { - tracing::trace!( - target: LOG_TARGET, - ?peer, - fallback = %fallback.0, - ?dial_options, - "send request with fallback to peer", - ); - - let request_id = self.next_request_id(); - self.command_tx - .try_send(RequestResponseCommand::SendRequestWithFallback { - peer, - request_id, - fallback, - request, - dial_options, - }) - .map(|_| request_id) - .map_err(|_| Error::ChannelClogged) - } - - /// Send response to remote peer. - pub fn send_response(&mut self, request_id: RequestId, response: Vec) { - match self.pending_responses.remove(&request_id) { - None => { - tracing::debug!(target: LOG_TARGET, ?request_id, "pending response doens't exist"); - } - Some(response_tx) => { - tracing::trace!(target: LOG_TARGET, ?request_id, "send response to peer"); - - if let Err(_) = response_tx.send((response, None)) { - tracing::debug!(target: LOG_TARGET, ?request_id, "substream closed"); - } - } - } - } - - /// Send response to remote peer with feedback. - /// - /// The feedback system is inherited from Polkadot SDK's `sc-network` and it's used to notify - /// the sender of the response whether it was sent successfully or not. Once the response has - /// been sent over the substream successfully, `()` will be sent over the feedback channel - /// to the sender to notify them about it. If the substream has been closed or the substream - /// failed while sending the response, the feedback channel will be dropped, notifying the - /// sender that sending the response failed. - pub fn send_response_with_feedback( - &mut self, - request_id: RequestId, - response: Vec, - feedback: channel::oneshot::Sender<()>, - ) { - match self.pending_responses.remove(&request_id) { - None => { - tracing::debug!(target: LOG_TARGET, ?request_id, "pending response doens't exist"); - } - Some(response_tx) => { - tracing::trace!(target: LOG_TARGET, ?request_id, "send response to peer"); - - if let Err(_) = response_tx.send((response, Some(feedback))) { - tracing::debug!(target: LOG_TARGET, ?request_id, "substream closed"); - } - } - } - } + /// Create new [`RequestResponseHandle`]. + pub(super) fn new( + event_rx: Receiver, + command_tx: Sender, + next_request_id: Arc, + ) -> Self { + Self { event_rx, command_tx, next_request_id, pending_responses: HashMap::new() } + } + + #[cfg(feature = "fuzz")] + /// Expose functionality for fuzzing + pub async fn fuzz_send_message( + &mut self, + command: RequestResponseCommand, + ) -> crate::Result { + let request_id = self.next_request_id(); + self.command_tx.send(command).await.map(|_| request_id).map_err(From::from) + } + + /// Reject an inbound request. + /// + /// Reject request received from a remote peer. The substream is dropped which signals + /// to the remote peer that request was rejected. + pub fn reject_request(&mut self, request_id: RequestId) { + match self.pending_responses.remove(&request_id) { + None => { + tracing::debug!(target: LOG_TARGET, ?request_id, "rejected request doesn't exist") + }, + Some(sender) => { + tracing::debug!(target: LOG_TARGET, ?request_id, "reject request"); + drop(sender); + }, + } + } + + /// Cancel an outbound request. + /// + /// Allows canceling an in-flight request if the local node is not interested in the answer + /// anymore. If the request was canceled, no event is reported to the user as the cancelation + /// always succeeds and it's assumed that the user does the necessary state clean up in their + /// end after calling [`RequestResponseHandle::cancel_request()`]. + pub async fn cancel_request(&mut self, request_id: RequestId) { + tracing::trace!(target: LOG_TARGET, ?request_id, "cancel request"); + + let _ = self.command_tx.send(RequestResponseCommand::CancelRequest { request_id }).await; + } + + /// Get next request ID. + fn next_request_id(&self) -> RequestId { + let request_id = self.next_request_id.fetch_add(1usize, Ordering::Relaxed); + RequestId::from(request_id) + } + + /// Send request to remote peer. + /// + /// While the returned `RequestId` is guaranteed to be unique for this request-response + /// protocol, it's not unique across all installed request-response protocols. That is, + /// multiple request-response protocols can return the same `RequestId` and this must be + /// handled by the calling code correctly if the `RequestId`s are stored somewhere. + pub async fn send_request( + &mut self, + peer: PeerId, + request: Vec, + dial_options: DialOptions, + ) -> crate::Result { + tracing::trace!(target: LOG_TARGET, ?peer, "send request to peer"); + + let request_id = self.next_request_id(); + self.command_tx + .send(RequestResponseCommand::SendRequest { peer, request_id, request, dial_options }) + .await + .map(|_| request_id) + .map_err(From::from) + } + + /// Attempt to send request to peer and if the channel is clogged, return + /// `Error::ChannelClogged`. + /// + /// While the returned `RequestId` is guaranteed to be unique for this request-response + /// protocol, it's not unique across all installed request-response protocols. That is, + /// multiple request-response protocols can return the same `RequestId` and this must be + /// handled by the calling code correctly if the `RequestId`s are stored somewhere. + pub fn try_send_request( + &mut self, + peer: PeerId, + request: Vec, + dial_options: DialOptions, + ) -> crate::Result { + tracing::trace!(target: LOG_TARGET, ?peer, "send request to peer"); + + let request_id = self.next_request_id(); + self.command_tx + .try_send(RequestResponseCommand::SendRequest { + peer, + request_id, + request, + dial_options, + }) + .map(|_| request_id) + .map_err(|_| Error::ChannelClogged) + } + + /// Send request to remote peer with fallback. + pub async fn send_request_with_fallback( + &mut self, + peer: PeerId, + request: Vec, + fallback: (ProtocolName, Vec), + dial_options: DialOptions, + ) -> crate::Result { + tracing::trace!( + target: LOG_TARGET, + ?peer, + fallback = %fallback.0, + ?dial_options, + "send request with fallback to peer", + ); + + let request_id = self.next_request_id(); + self.command_tx + .send(RequestResponseCommand::SendRequestWithFallback { + peer, + request_id, + fallback, + request, + dial_options, + }) + .await + .map(|_| request_id) + .map_err(From::from) + } + + /// Attempt to send request to peer with fallback and if the channel is clogged, + /// return `Error::ChannelClogged`. + pub fn try_send_request_with_fallback( + &mut self, + peer: PeerId, + request: Vec, + fallback: (ProtocolName, Vec), + dial_options: DialOptions, + ) -> crate::Result { + tracing::trace!( + target: LOG_TARGET, + ?peer, + fallback = %fallback.0, + ?dial_options, + "send request with fallback to peer", + ); + + let request_id = self.next_request_id(); + self.command_tx + .try_send(RequestResponseCommand::SendRequestWithFallback { + peer, + request_id, + fallback, + request, + dial_options, + }) + .map(|_| request_id) + .map_err(|_| Error::ChannelClogged) + } + + /// Send response to remote peer. + pub fn send_response(&mut self, request_id: RequestId, response: Vec) { + match self.pending_responses.remove(&request_id) { + None => { + tracing::debug!(target: LOG_TARGET, ?request_id, "pending response doens't exist"); + }, + Some(response_tx) => { + tracing::trace!(target: LOG_TARGET, ?request_id, "send response to peer"); + + if let Err(_) = response_tx.send((response, None)) { + tracing::debug!(target: LOG_TARGET, ?request_id, "substream closed"); + } + }, + } + } + + /// Send response to remote peer with feedback. + /// + /// The feedback system is inherited from Polkadot SDK's `sc-network` and it's used to notify + /// the sender of the response whether it was sent successfully or not. Once the response has + /// been sent over the substream successfully, `()` will be sent over the feedback channel + /// to the sender to notify them about it. If the substream has been closed or the substream + /// failed while sending the response, the feedback channel will be dropped, notifying the + /// sender that sending the response failed. + pub fn send_response_with_feedback( + &mut self, + request_id: RequestId, + response: Vec, + feedback: channel::oneshot::Sender<()>, + ) { + match self.pending_responses.remove(&request_id) { + None => { + tracing::debug!(target: LOG_TARGET, ?request_id, "pending response doens't exist"); + }, + Some(response_tx) => { + tracing::trace!(target: LOG_TARGET, ?request_id, "send response to peer"); + + if let Err(_) = response_tx.send((response, Some(feedback))) { + tracing::debug!(target: LOG_TARGET, ?request_id, "substream closed"); + } + }, + } + } } impl futures::Stream for RequestResponseHandle { - type Item = RequestResponseEvent; - - fn poll_next(mut self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll> { - match futures::ready!(self.event_rx.poll_recv(cx)) { - None => Poll::Ready(None), - Some(event) => match event { - InnerRequestResponseEvent::RequestReceived { - peer, - fallback, - request_id, - request, - response_tx, - } => { - self.pending_responses.insert(request_id, response_tx); - Poll::Ready(Some(RequestResponseEvent::RequestReceived { - peer, - fallback, - request_id, - request, - })) - } - event => Poll::Ready(Some(event.into())), - }, - } - } + type Item = RequestResponseEvent; + + fn poll_next(mut self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll> { + match futures::ready!(self.event_rx.poll_recv(cx)) { + None => Poll::Ready(None), + Some(event) => match event { + InnerRequestResponseEvent::RequestReceived { + peer, + fallback, + request_id, + request, + response_tx, + } => { + self.pending_responses.insert(request_id, response_tx); + Poll::Ready(Some(RequestResponseEvent::RequestReceived { + peer, + fallback, + request_id, + request, + })) + }, + event => Poll::Ready(Some(event.into())), + }, + } + } } diff --git a/client/litep2p/src/protocol/request_response/mod.rs b/client/litep2p/src/protocol/request_response/mod.rs index d763fa64..d03d68ac 100644 --- a/client/litep2p/src/protocol/request_response/mod.rs +++ b/client/litep2p/src/protocol/request_response/mod.rs @@ -21,42 +21,42 @@ //! Request-response protocol implementation. use crate::{ - error::{Error, NegotiationError, SubstreamError}, - multistream_select::NegotiationError::Failed as MultistreamFailed, - protocol::{ - request_response::handle::InnerRequestResponseEvent, Direction, TransportEvent, - TransportService, - }, - substream::Substream, - types::{protocol::ProtocolName, RequestId, SubstreamId}, - utils::futures_stream::FuturesStream, - PeerId, + error::{Error, NegotiationError, SubstreamError}, + multistream_select::NegotiationError::Failed as MultistreamFailed, + protocol::{ + request_response::handle::InnerRequestResponseEvent, Direction, TransportEvent, + TransportService, + }, + substream::Substream, + types::{protocol::ProtocolName, RequestId, SubstreamId}, + utils::futures_stream::FuturesStream, + PeerId, }; use bytes::BytesMut; use futures::{channel, future::BoxFuture, stream::FuturesUnordered, StreamExt}; use tokio::{ - sync::{ - mpsc::{Receiver, Sender}, - oneshot, - }, - time::sleep, + sync::{ + mpsc::{Receiver, Sender}, + oneshot, + }, + time::sleep, }; use std::{ - collections::{hash_map::Entry, HashMap, HashSet}, - io::ErrorKind, - sync::{ - atomic::{AtomicUsize, Ordering}, - Arc, - }, - time::Duration, + collections::{hash_map::Entry, HashMap, HashSet}, + io::ErrorKind, + sync::{ + atomic::{AtomicUsize, Ordering}, + Arc, + }, + time::Duration, }; pub use config::{Config, ConfigBuilder}; pub use handle::{ - DialOptions, RejectReason, RequestResponseCommand, RequestResponseError, RequestResponseEvent, - RequestResponseHandle, + DialOptions, RejectReason, RequestResponseCommand, RequestResponseError, RequestResponseEvent, + RequestResponseHandle, }; mod config; @@ -71,307 +71,283 @@ const LOG_TARGET: &str = "litep2p::request-response::protocol"; const REQUEST_TIMEOUT: Duration = Duration::from_secs(5); /// Pending request. -type PendingRequest = ( - PeerId, - RequestId, - Option, - Result, RequestResponseError>, -); +type PendingRequest = + (PeerId, RequestId, Option, Result, RequestResponseError>); /// Request context. struct RequestContext { - /// Peer ID. - peer: PeerId, + /// Peer ID. + peer: PeerId, - /// Request ID. - request_id: RequestId, + /// Request ID. + request_id: RequestId, - /// Request. - request: Vec, + /// Request. + request: Vec, - /// Fallback request. - fallback: Option<(ProtocolName, Vec)>, + /// Fallback request. + fallback: Option<(ProtocolName, Vec)>, } impl RequestContext { - /// Create new [`RequestContext`]. - fn new( - peer: PeerId, - request_id: RequestId, - request: Vec, - fallback: Option<(ProtocolName, Vec)>, - ) -> Self { - Self { - peer, - request_id, - request, - fallback, - } - } + /// Create new [`RequestContext`]. + fn new( + peer: PeerId, + request_id: RequestId, + request: Vec, + fallback: Option<(ProtocolName, Vec)>, + ) -> Self { + Self { peer, request_id, request, fallback } + } } /// Peer context. struct PeerContext { - /// Active requests. - active: HashSet, + /// Active requests. + active: HashSet, - /// Active inbound requests and their fallback names. - active_inbound: HashMap>, + /// Active inbound requests and their fallback names. + active_inbound: HashMap>, } impl PeerContext { - /// Create new [`PeerContext`]. - fn new() -> Self { - Self { - active: HashSet::new(), - active_inbound: HashMap::new(), - } - } + /// Create new [`PeerContext`]. + fn new() -> Self { + Self { active: HashSet::new(), active_inbound: HashMap::new() } + } } /// Request-response protocol. pub(crate) struct RequestResponseProtocol { - /// Transport service. - service: TransportService, - - /// Protocol. - protocol: ProtocolName, - - /// Connected peers. - peers: HashMap, - - /// Pending outbound substreams, mapped from `SubstreamId` to `RequestId`. - pending_outbound: HashMap, - - /// Pending outbound responses. - /// - /// The future listens to a `oneshot::Sender` which is given to `RequestResponseHandle`. - /// If the request is accepted by the local node, the response is sent over the channel to the - /// the future which sends it to remote peer and closes the substream. - /// - /// If the substream is rejected by the local node, the `oneshot::Sender` is dropped which - /// notifies the future that the request should be rejected by closing the substream. - pending_outbound_responses: FuturesUnordered>, - - /// Pending outbound cancellation handles. - pending_outbound_cancels: HashMap>, - - /// Pending inbound responses. - pending_inbound: FuturesUnordered>, - - /// Pending inbound requests. - pending_inbound_requests: FuturesStream< - BoxFuture< - 'static, - ( - PeerId, - RequestId, - Result, - Substream, - ), - >, - >, - - /// Pending dials for outbound requests. - pending_dials: HashMap, - - /// TX channel for sending events to the user protocol. - event_tx: Sender, - - /// RX channel for receive commands from the `RequestResponseHandle`. - command_rx: Receiver, - - /// Next request ID. - next_request_id: Arc, - - /// Timeout for outbound requests. - timeout: Duration, - - /// Maximum concurrent inbound requests, if specified. - max_concurrent_inbound_requests: Option, -} + /// Transport service. + service: TransportService, -impl RequestResponseProtocol { - /// Create new [`RequestResponseProtocol`]. - pub(crate) fn new(service: TransportService, config: Config) -> Self { - Self { - service, - peers: HashMap::new(), - timeout: config.timeout, - next_request_id: config.next_request_id, - event_tx: config.event_tx, - command_rx: config.command_rx, - protocol: config.protocol_name, - pending_dials: HashMap::new(), - pending_outbound: HashMap::new(), - pending_inbound: FuturesUnordered::new(), - pending_outbound_cancels: HashMap::new(), - pending_inbound_requests: FuturesStream::new(), - pending_outbound_responses: FuturesUnordered::new(), - max_concurrent_inbound_requests: config.max_concurrent_inbound_request, - } - } - - /// Get next ephemeral request ID. - fn next_request_id(&mut self) -> RequestId { - RequestId::from(self.next_request_id.fetch_add(1usize, Ordering::Relaxed)) - } - - /// Connection established to remote peer. - async fn on_connection_established(&mut self, peer: PeerId) -> crate::Result<()> { - tracing::debug!(target: LOG_TARGET, ?peer, protocol = %self.protocol, "connection established"); - - let Entry::Vacant(entry) = self.peers.entry(peer) else { - tracing::error!( - target: LOG_TARGET, - ?peer, - "state mismatch: peer already exists", - ); - debug_assert!(false); - return Err(Error::PeerAlreadyExists(peer)); - }; - - match self.pending_dials.remove(&peer) { - None => { - tracing::debug!( - target: LOG_TARGET, - ?peer, - protocol = %self.protocol, - "peer connected without pending dial", - ); - entry.insert(PeerContext::new()); - } - Some(context) => match self.service.open_substream(peer) { - Ok(substream_id) => { - tracing::trace!( - target: LOG_TARGET, - ?peer, - protocol = %self.protocol, - request_id = ?context.request_id, - ?substream_id, - "dial succeeded, open substream", - ); + /// Protocol. + protocol: ProtocolName, - entry.insert(PeerContext { - active: HashSet::from_iter([context.request_id]), - active_inbound: HashMap::new(), - }); - self.pending_outbound.insert( - substream_id, - RequestContext::new( - peer, - context.request_id, - context.request, - context.fallback, - ), - ); - } - // only reason the substream would fail to open would be that the connection - // would've been reported to the protocol with enough delay that the keep-alive - // timeout had expired and no other protocol had opened a substream to it, causing - // the connection to be closed - Err(error) => { - tracing::warn!( - target: LOG_TARGET, - ?peer, - protocol = %self.protocol, - request_id = ?context.request_id, - ?error, - "failed to open substream", - ); + /// Connected peers. + peers: HashMap, - return self - .report_request_failure( - peer, - context.request_id, - RequestResponseError::Rejected(error.into()), - ) - .await; - } - }, - } - - Ok(()) - } - - /// Connection closed to remote peer. - async fn on_connection_closed(&mut self, peer: PeerId) { - tracing::debug!(target: LOG_TARGET, ?peer, protocol = %self.protocol, "connection closed"); - - // Remove any pending outbound substreams for this peer. - self.pending_outbound.retain(|_, context| context.peer != peer); - - let Some(context) = self.peers.remove(&peer) else { - tracing::error!( - target: LOG_TARGET, - ?peer, - "Peer does not exist or substream open failed during connection establishment", - ); - return; - }; - - // sent failure events for all pending outbound requests - for request_id in context.active { - let _ = self - .event_tx - .send(InnerRequestResponseEvent::RequestFailed { - peer, - request_id, - error: RequestResponseError::Rejected(RejectReason::ConnectionClosed), - }) - .await; - } - } - - /// Local node opened a substream to remote node. - async fn on_outbound_substream( - &mut self, - peer: PeerId, - substream_id: SubstreamId, - mut substream: Substream, - fallback_protocol: Option, - ) -> crate::Result<()> { - let Some(RequestContext { - request_id, - request, - fallback, - .. - }) = self.pending_outbound.remove(&substream_id) - else { - tracing::error!( - target: LOG_TARGET, - ?peer, - protocol = %self.protocol, - ?substream_id, - "pending outbound request does not exist", - ); - debug_assert!(false); - - return Err(Error::InvalidState); - }; - - tracing::trace!( - target: LOG_TARGET, - ?peer, - protocol = %self.protocol, - ?substream_id, - ?request_id, - "substream opened, send request", - ); - - let request = match (&fallback_protocol, fallback) { - (Some(protocol), Some((fallback_protocol, fallback_request))) - if protocol == &fallback_protocol => - fallback_request, - _ => request, - }; - - let request_timeout = self.timeout; - let protocol = self.protocol.clone(); - let (tx, rx) = oneshot::channel(); - self.pending_outbound_cancels.insert(request_id, tx); - - self.pending_inbound.push(Box::pin(async move { + /// Pending outbound substreams, mapped from `SubstreamId` to `RequestId`. + pending_outbound: HashMap, + + /// Pending outbound responses. + /// + /// The future listens to a `oneshot::Sender` which is given to `RequestResponseHandle`. + /// If the request is accepted by the local node, the response is sent over the channel to the + /// the future which sends it to remote peer and closes the substream. + /// + /// If the substream is rejected by the local node, the `oneshot::Sender` is dropped which + /// notifies the future that the request should be rejected by closing the substream. + pending_outbound_responses: FuturesUnordered>, + + /// Pending outbound cancellation handles. + pending_outbound_cancels: HashMap>, + + /// Pending inbound responses. + pending_inbound: FuturesUnordered>, + + /// Pending inbound requests. + pending_inbound_requests: FuturesStream< + BoxFuture<'static, (PeerId, RequestId, Result, Substream)>, + >, + + /// Pending dials for outbound requests. + pending_dials: HashMap, + + /// TX channel for sending events to the user protocol. + event_tx: Sender, + + /// RX channel for receive commands from the `RequestResponseHandle`. + command_rx: Receiver, + + /// Next request ID. + next_request_id: Arc, + + /// Timeout for outbound requests. + timeout: Duration, + + /// Maximum concurrent inbound requests, if specified. + max_concurrent_inbound_requests: Option, +} + +impl RequestResponseProtocol { + /// Create new [`RequestResponseProtocol`]. + pub(crate) fn new(service: TransportService, config: Config) -> Self { + Self { + service, + peers: HashMap::new(), + timeout: config.timeout, + next_request_id: config.next_request_id, + event_tx: config.event_tx, + command_rx: config.command_rx, + protocol: config.protocol_name, + pending_dials: HashMap::new(), + pending_outbound: HashMap::new(), + pending_inbound: FuturesUnordered::new(), + pending_outbound_cancels: HashMap::new(), + pending_inbound_requests: FuturesStream::new(), + pending_outbound_responses: FuturesUnordered::new(), + max_concurrent_inbound_requests: config.max_concurrent_inbound_request, + } + } + + /// Get next ephemeral request ID. + fn next_request_id(&mut self) -> RequestId { + RequestId::from(self.next_request_id.fetch_add(1usize, Ordering::Relaxed)) + } + + /// Connection established to remote peer. + async fn on_connection_established(&mut self, peer: PeerId) -> crate::Result<()> { + tracing::debug!(target: LOG_TARGET, ?peer, protocol = %self.protocol, "connection established"); + + let Entry::Vacant(entry) = self.peers.entry(peer) else { + tracing::error!( + target: LOG_TARGET, + ?peer, + "state mismatch: peer already exists", + ); + debug_assert!(false); + return Err(Error::PeerAlreadyExists(peer)); + }; + + match self.pending_dials.remove(&peer) { + None => { + tracing::debug!( + target: LOG_TARGET, + ?peer, + protocol = %self.protocol, + "peer connected without pending dial", + ); + entry.insert(PeerContext::new()); + }, + Some(context) => match self.service.open_substream(peer) { + Ok(substream_id) => { + tracing::trace!( + target: LOG_TARGET, + ?peer, + protocol = %self.protocol, + request_id = ?context.request_id, + ?substream_id, + "dial succeeded, open substream", + ); + + entry.insert(PeerContext { + active: HashSet::from_iter([context.request_id]), + active_inbound: HashMap::new(), + }); + self.pending_outbound.insert( + substream_id, + RequestContext::new( + peer, + context.request_id, + context.request, + context.fallback, + ), + ); + }, + // only reason the substream would fail to open would be that the connection + // would've been reported to the protocol with enough delay that the keep-alive + // timeout had expired and no other protocol had opened a substream to it, causing + // the connection to be closed + Err(error) => { + tracing::warn!( + target: LOG_TARGET, + ?peer, + protocol = %self.protocol, + request_id = ?context.request_id, + ?error, + "failed to open substream", + ); + + return self + .report_request_failure( + peer, + context.request_id, + RequestResponseError::Rejected(error.into()), + ) + .await; + }, + }, + } + + Ok(()) + } + + /// Connection closed to remote peer. + async fn on_connection_closed(&mut self, peer: PeerId) { + tracing::debug!(target: LOG_TARGET, ?peer, protocol = %self.protocol, "connection closed"); + + // Remove any pending outbound substreams for this peer. + self.pending_outbound.retain(|_, context| context.peer != peer); + + let Some(context) = self.peers.remove(&peer) else { + tracing::error!( + target: LOG_TARGET, + ?peer, + "Peer does not exist or substream open failed during connection establishment", + ); + return; + }; + + // sent failure events for all pending outbound requests + for request_id in context.active { + let _ = self + .event_tx + .send(InnerRequestResponseEvent::RequestFailed { + peer, + request_id, + error: RequestResponseError::Rejected(RejectReason::ConnectionClosed), + }) + .await; + } + } + + /// Local node opened a substream to remote node. + async fn on_outbound_substream( + &mut self, + peer: PeerId, + substream_id: SubstreamId, + mut substream: Substream, + fallback_protocol: Option, + ) -> crate::Result<()> { + let Some(RequestContext { request_id, request, fallback, .. }) = + self.pending_outbound.remove(&substream_id) + else { + tracing::error!( + target: LOG_TARGET, + ?peer, + protocol = %self.protocol, + ?substream_id, + "pending outbound request does not exist", + ); + debug_assert!(false); + + return Err(Error::InvalidState); + }; + + tracing::trace!( + target: LOG_TARGET, + ?peer, + protocol = %self.protocol, + ?substream_id, + ?request_id, + "substream opened, send request", + ); + + let request = match (&fallback_protocol, fallback) { + (Some(protocol), Some((fallback_protocol, fallback_request))) + if protocol == &fallback_protocol => + fallback_request, + _ => request, + }; + + let request_timeout = self.timeout; + let protocol = self.protocol.clone(); + let (tx, rx) = oneshot::channel(); + self.pending_outbound_cancels.insert(request_id, tx); + + self.pending_inbound.push(Box::pin(async move { match tokio::time::timeout(request_timeout, substream.send_framed(request.into())).await { Err(_) => ( @@ -454,630 +430,605 @@ impl RequestResponseProtocol { } })); - Ok(()) - } - - /// Handle pending inbound response. - async fn on_inbound_request( - &mut self, - peer: PeerId, - request_id: RequestId, - request: Result, - mut substream: Substream, - ) -> crate::Result<()> { - // The peer will no longer exist if the connection was closed before processing the request. - let peer_context = self.peers.get_mut(&peer).ok_or(Error::PeerDoesntExist(peer))?; - let fallback = peer_context.active_inbound.remove(&request_id).ok_or_else(|| { - tracing::debug!( - target: LOG_TARGET, - ?peer, - protocol = %self.protocol, - ?request_id, - "no active inbound request", - ); - - Error::InvalidState - })?; - - let protocol = self.protocol.clone(); - - tracing::trace!( - target: LOG_TARGET, - ?peer, - %protocol, - ?request_id, - "inbound request", - ); - - let Ok(request) = request else { - tracing::debug!( - target: LOG_TARGET, - ?peer, - %protocol, - ?request_id, - ?request, - "failed to read request from substream", - ); - return Err(Error::InvalidData); - }; - - // once the request has been read from the substream, start a future which waits - // for an input from the user. - // - // the input is either a response (succes) or rejection (failure) which is communicated - // by sending the response over the `oneshot::Sender` or closing it, respectively. - let timeout = self.timeout; - let (response_tx, rx): ( - oneshot::Sender<(Vec, Option>)>, - _, - ) = oneshot::channel(); - - self.pending_outbound_responses.push(Box::pin(async move { - match rx.await { - Err(_) => { - tracing::debug!( - target: LOG_TARGET, - ?peer, - %protocol, - ?request_id, - "request rejected", - ); - let _ = substream.close().await; - } - Ok((response, mut feedback)) => { - tracing::trace!( - target: LOG_TARGET, - ?peer, - %protocol, - ?request_id, - "send response", - ); - - match tokio::time::timeout(timeout, substream.send_framed(response.into())) - .await - { - Err(_) => tracing::debug!( - target: LOG_TARGET, - ?peer, - %protocol, - ?request_id, - "timed out while sending response", - ), - Ok(Ok(_)) => feedback.take().map_or((), |feedback| { - let _ = feedback.send(()); - }), - Ok(Err(error)) => tracing::trace!( - target: LOG_TARGET, - ?peer, - %protocol, - ?request_id, - ?error, - "failed to send request to peer", - ), - } - } - } - })); - - self.event_tx - .send(InnerRequestResponseEvent::RequestReceived { - peer, - fallback, - request_id, - request: request.freeze().into(), - response_tx, - }) - .await - .map_err(From::from) - } - - /// Remote opened a substream to local node. - async fn on_inbound_substream( - &mut self, - peer: PeerId, - fallback: Option, - mut substream: Substream, - ) -> crate::Result<()> { - tracing::trace!(target: LOG_TARGET, ?peer, protocol = %self.protocol, "handle inbound substream"); - - if let Some(max_requests) = self.max_concurrent_inbound_requests { - let num_inbound_requests = - self.pending_inbound_requests.len() + self.pending_outbound_responses.len(); - - if max_requests <= num_inbound_requests { - tracing::debug!( - target: LOG_TARGET, - ?peer, - protocol = %self.protocol, - ?fallback, - ?max_requests, - "rejecting request as already at maximum", - ); - - let _ = substream.close().await; - return Ok(()); - } - } - - // allocate ephemeral id for the inbound request and return it to the user protocol - // - // when user responds to the request, this is used to associate the response with the - // correct substream. - let request_id = self.next_request_id(); - self.peers - .get_mut(&peer) - .ok_or(Error::PeerDoesntExist(peer))? - .active_inbound - .insert(request_id, fallback); - - self.pending_inbound_requests.push(Box::pin(async move { - let request = match substream.next().await { - Some(Ok(request)) => Ok(request), - Some(Err(error)) => Err(error), - None => Err(SubstreamError::ConnectionClosed), - }; - - (peer, request_id, request, substream) - })); - - Ok(()) - } - - async fn on_dial_failure(&mut self, peer: PeerId) { - if let Some(context) = self.pending_dials.remove(&peer) { - tracing::debug!(target: LOG_TARGET, ?peer, protocol = %self.protocol, "failed to dial peer"); - - let _ = self - .peers - .get_mut(&peer) - .map(|peer_context| peer_context.active.remove(&context.request_id)); - let _ = self - .report_request_failure( - peer, - context.request_id, - RequestResponseError::Rejected(RejectReason::DialFailed(None)), - ) - .await; - } - } - - /// Failed to open substream to remote peer. - async fn on_substream_open_failure( - &mut self, - substream: SubstreamId, - error: SubstreamError, - ) -> crate::Result<()> { - let Some(RequestContext { - request_id, peer, .. - }) = self.pending_outbound.remove(&substream) - else { - tracing::error!( - target: LOG_TARGET, - protocol = %self.protocol, - ?substream, - "pending outbound request does not exist", - ); - debug_assert!(false); - - return Err(Error::InvalidState); - }; - - tracing::debug!( - target: LOG_TARGET, - ?peer, - protocol = %self.protocol, - ?request_id, - ?substream, - ?error, - "failed to open substream", - ); - - let _ = self - .peers - .get_mut(&peer) - .map(|peer_context| peer_context.active.remove(&request_id)); - - self.event_tx - .send(InnerRequestResponseEvent::RequestFailed { - peer, - request_id, - error: match error { - SubstreamError::NegotiationError(NegotiationError::MultistreamSelectError( - MultistreamFailed, - )) => RequestResponseError::UnsupportedProtocol, - _ => RequestResponseError::Rejected(error.into()), - }, - }) - .await - .map_err(From::from) - } - - /// Report request send failure to user. - async fn report_request_failure( - &mut self, - peer: PeerId, - request_id: RequestId, - error: RequestResponseError, - ) -> crate::Result<()> { - self.event_tx - .send(InnerRequestResponseEvent::RequestFailed { - peer, - request_id, - error, - }) - .await - .map_err(From::from) - } - - /// Send request to remote peer. - fn on_send_request( - &mut self, - peer: PeerId, - request_id: RequestId, - request: Vec, - dial_options: DialOptions, - fallback: Option<(ProtocolName, Vec)>, - ) -> Result<(), RequestResponseError> { - tracing::trace!( - target: LOG_TARGET, - ?peer, - protocol = %self.protocol, - ?request_id, - ?dial_options, - "send request to remote peer", - ); - - let Some(context) = self.peers.get_mut(&peer) else { - match dial_options { - DialOptions::Reject => { - tracing::debug!( - target: LOG_TARGET, - ?peer, - protocol = %self.protocol, - ?request_id, - ?dial_options, - "peer not connected and should not dial", - ); - - return Err(RequestResponseError::NotConnected); - } - DialOptions::Dial => match self.service.dial(&peer) { - Ok(_) => { - tracing::trace!( - target: LOG_TARGET, - ?peer, - protocol = %self.protocol, - ?request_id, - "started dialing peer", - ); - - self.pending_dials.insert( - peer, - RequestContext::new(peer, request_id, request, fallback), - ); - return Ok(()); - } - Err(error) => { - tracing::debug!( - target: LOG_TARGET, - ?peer, - protocol = %self.protocol, - ?error, - "failed to dial peer" - ); - - return Err(RequestResponseError::Rejected(RejectReason::DialFailed( - Some(error), - ))); - } - }, - } - }; - - // open substream and push it pending outbound substreams - // once the substream is opened, send the request. - match self.service.open_substream(peer) { - Ok(substream_id) => { - let unique_request_id = context.active.insert(request_id); - debug_assert!(unique_request_id); - - self.pending_outbound.insert( - substream_id, - RequestContext::new(peer, request_id, request, fallback), - ); - - Ok(()) - } - Err(error) => { - tracing::debug!( - target: LOG_TARGET, - ?peer, - protocol = %self.protocol, - ?request_id, - ?error, - "failed to open substream", - ); - - Err(RequestResponseError::Rejected(error.into())) - } - } - } - - /// Handle substream event. - async fn on_substream_event( - &mut self, - peer: PeerId, - request_id: RequestId, - fallback: Option, - message: Result, RequestResponseError>, - ) -> crate::Result<()> { - if !self - .peers - .get_mut(&peer) - .ok_or(Error::PeerDoesntExist(peer))? - .active - .remove(&request_id) - { - tracing::warn!( - target: LOG_TARGET, - ?peer, - protocol = %self.protocol, - ?request_id, - "invalid state: received substream event but no active substream", - ); - return Err(Error::InvalidState); - } - - let event = match message { - Ok(response) => InnerRequestResponseEvent::ResponseReceived { - peer, - request_id, - response, - fallback, - }, - Err(error) => match error { - RequestResponseError::Canceled => { - tracing::debug!( - target: LOG_TARGET, - ?peer, - protocol = %self.protocol, - ?request_id, - "request canceled by local node", - ); - return Ok(()); - } - error => InnerRequestResponseEvent::RequestFailed { - peer, - request_id, - error, - }, - }, - }; - - self.event_tx.send(event).await.map_err(From::from) - } - - /// Cancel outbound request. - fn on_cancel_request(&mut self, request_id: RequestId) -> crate::Result<()> { - tracing::trace!(target: LOG_TARGET, protocol = %self.protocol, ?request_id, "cancel outbound request"); - - match self.pending_outbound_cancels.remove(&request_id) { - Some(tx) => tx.send(()).map_err(|_| Error::SubstreamDoesntExist), - None => { - tracing::debug!( - target: LOG_TARGET, - protocol = %self.protocol, - ?request_id, - "tried to cancel request which doesn't exist", - ); - - Ok(()) - } - } - } - - /// Handles the service event. - async fn handle_service_event(&mut self, event: TransportEvent) { - match event { - TransportEvent::ConnectionEstablished { peer, .. } => { - if let Err(error) = self.on_connection_established(peer).await { - tracing::debug!( - target: LOG_TARGET, - ?peer, - protocol = %self.protocol, - ?error, - "failed to handle connection established", - ); - } - } - - TransportEvent::ConnectionClosed { peer } => { - self.on_connection_closed(peer).await; - } - - TransportEvent::SubstreamOpened { - peer, - substream, - direction, - fallback, - .. - } => match direction { - Direction::Inbound => { - if let Err(error) = self.on_inbound_substream(peer, fallback, substream).await { - tracing::debug!( - target: LOG_TARGET, - ?peer, - protocol = %self.protocol, - ?error, - "failed to handle inbound substream", - ); - } - } - Direction::Outbound(substream_id) => { - let _ = - self.on_outbound_substream(peer, substream_id, substream, fallback).await; - } - }, - - TransportEvent::SubstreamOpenFailure { substream, error } => { - if let Err(error) = self.on_substream_open_failure(substream, error).await { - tracing::warn!( - target: LOG_TARGET, - protocol = %self.protocol, - ?error, - "failed to handle substream open failure", - ); - } - } - - TransportEvent::DialFailure { peer, .. } => self.on_dial_failure(peer).await, - } - } - - /// Handles the user command. - async fn handle_user_command(&mut self, command: RequestResponseCommand) { - match command { - RequestResponseCommand::SendRequest { - peer, - request_id, - request, - dial_options, - } => { - if let Err(error) = - self.on_send_request(peer, request_id, request, dial_options, None) - { - tracing::debug!( - target: LOG_TARGET, - ?peer, - protocol = %self.protocol, - ?request_id, - ?error, - "failed to send request", - ); - - if let Err(error) = self.report_request_failure(peer, request_id, error).await { - tracing::debug!( - target: LOG_TARGET, - ?peer, - protocol = %self.protocol, - ?request_id, - ?error, - "failed to report request failure", - ); - } - } - } - RequestResponseCommand::SendRequestWithFallback { - peer, - request_id, - request, - fallback, - dial_options, - } => { - if let Err(error) = - self.on_send_request(peer, request_id, request, dial_options, Some(fallback)) - { - tracing::debug!( - target: LOG_TARGET, - ?peer, - protocol = %self.protocol, - ?request_id, - ?error, - "failed to send request", - ); - - if let Err(error) = self.report_request_failure(peer, request_id, error).await { - tracing::debug!( - target: LOG_TARGET, - ?peer, - protocol = %self.protocol, - ?request_id, - ?error, - "failed to report request failure", - ); - } - } - } - RequestResponseCommand::CancelRequest { request_id } => { - if let Err(error) = self.on_cancel_request(request_id) { - tracing::debug!( - target: LOG_TARGET, - protocol = %self.protocol, - ?request_id, - ?error, - "failed to cancel reqeuest", - ); - } - } - } - } - - /// Start [`RequestResponseProtocol`] event loop. - pub async fn run(mut self) { - tracing::debug!(target: LOG_TARGET, "starting request-response event loop"); - - loop { - tokio::select! { - // events coming from the network have higher priority than user commands as all user commands are - // responses to network behaviour so ensure that the commands operate on the most up to date information. - biased; - - // Connection and substream events from the transport service. - event = self.service.next() => match event { - Some(event) => self.handle_service_event(event).await, - None => { - tracing::debug!(target: LOG_TARGET, protocol = %self.protocol, "service has exited, exiting"); - return - } - }, - - // These are outbound requests waiting for the substream to produce a response. - event = self.pending_inbound.select_next_some(), if !self.pending_inbound.is_empty() => { - let (peer, request_id, fallback, event) = event; - - if let Err(error) = self.on_substream_event(peer, request_id, fallback, event).await { - tracing::debug!( - target: LOG_TARGET, - ?peer, - protocol = %self.protocol, - ?request_id, - ?error, - "failed to handle substream event", - ); - } - - self.pending_outbound_cancels.remove(&request_id); - } - - // These are inbound requests waiting for the user to respond, then for the substream to send the response. - _ = self.pending_outbound_responses.next(), if !self.pending_outbound_responses.is_empty() => {} - - // Inbound requests that are moved to `pending_outbound_responses`. - event = self.pending_inbound_requests.next(), if !self.pending_inbound_requests.is_empty() => match event { - Some((peer, request_id, request, substream)) => { - if let Err(error) = self.on_inbound_request(peer, request_id, request, substream).await { - tracing::debug!( - target: LOG_TARGET, - ?peer, - protocol = %self.protocol, - ?request_id, - ?error, - "failed to handle inbound request", - ); - } - } - None => return, - }, - - // User commands. - command = self.command_rx.recv() => match command { - Some(command) => self.handle_user_command(command).await, - None => { - tracing::debug!(target: LOG_TARGET, protocol = %self.protocol, "user protocol has exited, exiting"); - return - } - }, - } - } - } + Ok(()) + } + + /// Handle pending inbound response. + async fn on_inbound_request( + &mut self, + peer: PeerId, + request_id: RequestId, + request: Result, + mut substream: Substream, + ) -> crate::Result<()> { + // The peer will no longer exist if the connection was closed before processing the request. + let peer_context = self.peers.get_mut(&peer).ok_or(Error::PeerDoesntExist(peer))?; + let fallback = peer_context.active_inbound.remove(&request_id).ok_or_else(|| { + tracing::debug!( + target: LOG_TARGET, + ?peer, + protocol = %self.protocol, + ?request_id, + "no active inbound request", + ); + + Error::InvalidState + })?; + + let protocol = self.protocol.clone(); + + tracing::trace!( + target: LOG_TARGET, + ?peer, + %protocol, + ?request_id, + "inbound request", + ); + + let Ok(request) = request else { + tracing::debug!( + target: LOG_TARGET, + ?peer, + %protocol, + ?request_id, + ?request, + "failed to read request from substream", + ); + return Err(Error::InvalidData); + }; + + // once the request has been read from the substream, start a future which waits + // for an input from the user. + // + // the input is either a response (succes) or rejection (failure) which is communicated + // by sending the response over the `oneshot::Sender` or closing it, respectively. + let timeout = self.timeout; + let (response_tx, rx): ( + oneshot::Sender<(Vec, Option>)>, + _, + ) = oneshot::channel(); + + self.pending_outbound_responses.push(Box::pin(async move { + match rx.await { + Err(_) => { + tracing::debug!( + target: LOG_TARGET, + ?peer, + %protocol, + ?request_id, + "request rejected", + ); + let _ = substream.close().await; + }, + Ok((response, mut feedback)) => { + tracing::trace!( + target: LOG_TARGET, + ?peer, + %protocol, + ?request_id, + "send response", + ); + + match tokio::time::timeout(timeout, substream.send_framed(response.into())) + .await + { + Err(_) => tracing::debug!( + target: LOG_TARGET, + ?peer, + %protocol, + ?request_id, + "timed out while sending response", + ), + Ok(Ok(_)) => feedback.take().map_or((), |feedback| { + let _ = feedback.send(()); + }), + Ok(Err(error)) => tracing::trace!( + target: LOG_TARGET, + ?peer, + %protocol, + ?request_id, + ?error, + "failed to send request to peer", + ), + } + }, + } + })); + + self.event_tx + .send(InnerRequestResponseEvent::RequestReceived { + peer, + fallback, + request_id, + request: request.freeze().into(), + response_tx, + }) + .await + .map_err(From::from) + } + + /// Remote opened a substream to local node. + async fn on_inbound_substream( + &mut self, + peer: PeerId, + fallback: Option, + mut substream: Substream, + ) -> crate::Result<()> { + tracing::trace!(target: LOG_TARGET, ?peer, protocol = %self.protocol, "handle inbound substream"); + + if let Some(max_requests) = self.max_concurrent_inbound_requests { + let num_inbound_requests = + self.pending_inbound_requests.len() + self.pending_outbound_responses.len(); + + if max_requests <= num_inbound_requests { + tracing::debug!( + target: LOG_TARGET, + ?peer, + protocol = %self.protocol, + ?fallback, + ?max_requests, + "rejecting request as already at maximum", + ); + + let _ = substream.close().await; + return Ok(()); + } + } + + // allocate ephemeral id for the inbound request and return it to the user protocol + // + // when user responds to the request, this is used to associate the response with the + // correct substream. + let request_id = self.next_request_id(); + self.peers + .get_mut(&peer) + .ok_or(Error::PeerDoesntExist(peer))? + .active_inbound + .insert(request_id, fallback); + + self.pending_inbound_requests.push(Box::pin(async move { + let request = match substream.next().await { + Some(Ok(request)) => Ok(request), + Some(Err(error)) => Err(error), + None => Err(SubstreamError::ConnectionClosed), + }; + + (peer, request_id, request, substream) + })); + + Ok(()) + } + + async fn on_dial_failure(&mut self, peer: PeerId) { + if let Some(context) = self.pending_dials.remove(&peer) { + tracing::debug!(target: LOG_TARGET, ?peer, protocol = %self.protocol, "failed to dial peer"); + + let _ = self + .peers + .get_mut(&peer) + .map(|peer_context| peer_context.active.remove(&context.request_id)); + let _ = self + .report_request_failure( + peer, + context.request_id, + RequestResponseError::Rejected(RejectReason::DialFailed(None)), + ) + .await; + } + } + + /// Failed to open substream to remote peer. + async fn on_substream_open_failure( + &mut self, + substream: SubstreamId, + error: SubstreamError, + ) -> crate::Result<()> { + let Some(RequestContext { request_id, peer, .. }) = + self.pending_outbound.remove(&substream) + else { + tracing::error!( + target: LOG_TARGET, + protocol = %self.protocol, + ?substream, + "pending outbound request does not exist", + ); + debug_assert!(false); + + return Err(Error::InvalidState); + }; + + tracing::debug!( + target: LOG_TARGET, + ?peer, + protocol = %self.protocol, + ?request_id, + ?substream, + ?error, + "failed to open substream", + ); + + let _ = self + .peers + .get_mut(&peer) + .map(|peer_context| peer_context.active.remove(&request_id)); + + self.event_tx + .send(InnerRequestResponseEvent::RequestFailed { + peer, + request_id, + error: match error { + SubstreamError::NegotiationError(NegotiationError::MultistreamSelectError( + MultistreamFailed, + )) => RequestResponseError::UnsupportedProtocol, + _ => RequestResponseError::Rejected(error.into()), + }, + }) + .await + .map_err(From::from) + } + + /// Report request send failure to user. + async fn report_request_failure( + &mut self, + peer: PeerId, + request_id: RequestId, + error: RequestResponseError, + ) -> crate::Result<()> { + self.event_tx + .send(InnerRequestResponseEvent::RequestFailed { peer, request_id, error }) + .await + .map_err(From::from) + } + + /// Send request to remote peer. + fn on_send_request( + &mut self, + peer: PeerId, + request_id: RequestId, + request: Vec, + dial_options: DialOptions, + fallback: Option<(ProtocolName, Vec)>, + ) -> Result<(), RequestResponseError> { + tracing::trace!( + target: LOG_TARGET, + ?peer, + protocol = %self.protocol, + ?request_id, + ?dial_options, + "send request to remote peer", + ); + + let Some(context) = self.peers.get_mut(&peer) else { + match dial_options { + DialOptions::Reject => { + tracing::debug!( + target: LOG_TARGET, + ?peer, + protocol = %self.protocol, + ?request_id, + ?dial_options, + "peer not connected and should not dial", + ); + + return Err(RequestResponseError::NotConnected); + }, + DialOptions::Dial => match self.service.dial(&peer) { + Ok(_) => { + tracing::trace!( + target: LOG_TARGET, + ?peer, + protocol = %self.protocol, + ?request_id, + "started dialing peer", + ); + + self.pending_dials + .insert(peer, RequestContext::new(peer, request_id, request, fallback)); + return Ok(()); + }, + Err(error) => { + tracing::debug!( + target: LOG_TARGET, + ?peer, + protocol = %self.protocol, + ?error, + "failed to dial peer" + ); + + return Err(RequestResponseError::Rejected(RejectReason::DialFailed(Some( + error, + )))); + }, + }, + } + }; + + // open substream and push it pending outbound substreams + // once the substream is opened, send the request. + match self.service.open_substream(peer) { + Ok(substream_id) => { + let unique_request_id = context.active.insert(request_id); + debug_assert!(unique_request_id); + + self.pending_outbound + .insert(substream_id, RequestContext::new(peer, request_id, request, fallback)); + + Ok(()) + }, + Err(error) => { + tracing::debug!( + target: LOG_TARGET, + ?peer, + protocol = %self.protocol, + ?request_id, + ?error, + "failed to open substream", + ); + + Err(RequestResponseError::Rejected(error.into())) + }, + } + } + + /// Handle substream event. + async fn on_substream_event( + &mut self, + peer: PeerId, + request_id: RequestId, + fallback: Option, + message: Result, RequestResponseError>, + ) -> crate::Result<()> { + if !self + .peers + .get_mut(&peer) + .ok_or(Error::PeerDoesntExist(peer))? + .active + .remove(&request_id) + { + tracing::warn!( + target: LOG_TARGET, + ?peer, + protocol = %self.protocol, + ?request_id, + "invalid state: received substream event but no active substream", + ); + return Err(Error::InvalidState); + } + + let event = match message { + Ok(response) => + InnerRequestResponseEvent::ResponseReceived { peer, request_id, response, fallback }, + Err(error) => match error { + RequestResponseError::Canceled => { + tracing::debug!( + target: LOG_TARGET, + ?peer, + protocol = %self.protocol, + ?request_id, + "request canceled by local node", + ); + return Ok(()); + }, + error => InnerRequestResponseEvent::RequestFailed { peer, request_id, error }, + }, + }; + + self.event_tx.send(event).await.map_err(From::from) + } + + /// Cancel outbound request. + fn on_cancel_request(&mut self, request_id: RequestId) -> crate::Result<()> { + tracing::trace!(target: LOG_TARGET, protocol = %self.protocol, ?request_id, "cancel outbound request"); + + match self.pending_outbound_cancels.remove(&request_id) { + Some(tx) => tx.send(()).map_err(|_| Error::SubstreamDoesntExist), + None => { + tracing::debug!( + target: LOG_TARGET, + protocol = %self.protocol, + ?request_id, + "tried to cancel request which doesn't exist", + ); + + Ok(()) + }, + } + } + + /// Handles the service event. + async fn handle_service_event(&mut self, event: TransportEvent) { + match event { + TransportEvent::ConnectionEstablished { peer, .. } => { + if let Err(error) = self.on_connection_established(peer).await { + tracing::debug!( + target: LOG_TARGET, + ?peer, + protocol = %self.protocol, + ?error, + "failed to handle connection established", + ); + } + }, + + TransportEvent::ConnectionClosed { peer } => { + self.on_connection_closed(peer).await; + }, + + TransportEvent::SubstreamOpened { peer, substream, direction, fallback, .. } => + match direction { + Direction::Inbound => { + if let Err(error) = + self.on_inbound_substream(peer, fallback, substream).await + { + tracing::debug!( + target: LOG_TARGET, + ?peer, + protocol = %self.protocol, + ?error, + "failed to handle inbound substream", + ); + } + }, + Direction::Outbound(substream_id) => { + let _ = self + .on_outbound_substream(peer, substream_id, substream, fallback) + .await; + }, + }, + + TransportEvent::SubstreamOpenFailure { substream, error } => { + if let Err(error) = self.on_substream_open_failure(substream, error).await { + tracing::warn!( + target: LOG_TARGET, + protocol = %self.protocol, + ?error, + "failed to handle substream open failure", + ); + } + }, + + TransportEvent::DialFailure { peer, .. } => self.on_dial_failure(peer).await, + } + } + + /// Handles the user command. + async fn handle_user_command(&mut self, command: RequestResponseCommand) { + match command { + RequestResponseCommand::SendRequest { peer, request_id, request, dial_options } => + if let Err(error) = + self.on_send_request(peer, request_id, request, dial_options, None) + { + tracing::debug!( + target: LOG_TARGET, + ?peer, + protocol = %self.protocol, + ?request_id, + ?error, + "failed to send request", + ); + + if let Err(error) = self.report_request_failure(peer, request_id, error).await { + tracing::debug!( + target: LOG_TARGET, + ?peer, + protocol = %self.protocol, + ?request_id, + ?error, + "failed to report request failure", + ); + } + }, + RequestResponseCommand::SendRequestWithFallback { + peer, + request_id, + request, + fallback, + dial_options, + } => { + if let Err(error) = + self.on_send_request(peer, request_id, request, dial_options, Some(fallback)) + { + tracing::debug!( + target: LOG_TARGET, + ?peer, + protocol = %self.protocol, + ?request_id, + ?error, + "failed to send request", + ); + + if let Err(error) = self.report_request_failure(peer, request_id, error).await { + tracing::debug!( + target: LOG_TARGET, + ?peer, + protocol = %self.protocol, + ?request_id, + ?error, + "failed to report request failure", + ); + } + } + }, + RequestResponseCommand::CancelRequest { request_id } => { + if let Err(error) = self.on_cancel_request(request_id) { + tracing::debug!( + target: LOG_TARGET, + protocol = %self.protocol, + ?request_id, + ?error, + "failed to cancel reqeuest", + ); + } + }, + } + } + + /// Start [`RequestResponseProtocol`] event loop. + pub async fn run(mut self) { + tracing::debug!(target: LOG_TARGET, "starting request-response event loop"); + + loop { + tokio::select! { + // events coming from the network have higher priority than user commands as all user commands are + // responses to network behaviour so ensure that the commands operate on the most up to date information. + biased; + + // Connection and substream events from the transport service. + event = self.service.next() => match event { + Some(event) => self.handle_service_event(event).await, + None => { + tracing::debug!(target: LOG_TARGET, protocol = %self.protocol, "service has exited, exiting"); + return + } + }, + + // These are outbound requests waiting for the substream to produce a response. + event = self.pending_inbound.select_next_some(), if !self.pending_inbound.is_empty() => { + let (peer, request_id, fallback, event) = event; + + if let Err(error) = self.on_substream_event(peer, request_id, fallback, event).await { + tracing::debug!( + target: LOG_TARGET, + ?peer, + protocol = %self.protocol, + ?request_id, + ?error, + "failed to handle substream event", + ); + } + + self.pending_outbound_cancels.remove(&request_id); + } + + // These are inbound requests waiting for the user to respond, then for the substream to send the response. + _ = self.pending_outbound_responses.next(), if !self.pending_outbound_responses.is_empty() => {} + + // Inbound requests that are moved to `pending_outbound_responses`. + event = self.pending_inbound_requests.next(), if !self.pending_inbound_requests.is_empty() => match event { + Some((peer, request_id, request, substream)) => { + if let Err(error) = self.on_inbound_request(peer, request_id, request, substream).await { + tracing::debug!( + target: LOG_TARGET, + ?peer, + protocol = %self.protocol, + ?request_id, + ?error, + "failed to handle inbound request", + ); + } + } + None => return, + }, + + // User commands. + command = self.command_rx.recv() => match command { + Some(command) => self.handle_user_command(command).await, + None => { + tracing::debug!(target: LOG_TARGET, protocol = %self.protocol, "user protocol has exited, exiting"); + return + } + }, + } + } + } } diff --git a/client/litep2p/src/protocol/request_response/tests.rs b/client/litep2p/src/protocol/request_response/tests.rs index 9873170a..e29ddfa3 100644 --- a/client/litep2p/src/protocol/request_response/tests.rs +++ b/client/litep2p/src/protocol/request_response/tests.rs @@ -19,21 +19,21 @@ // DEALINGS IN THE SOFTWARE. use crate::{ - mock::substream::{DummySubstream, MockSubstream}, - protocol::{ - request_response::{ - ConfigBuilder, DialOptions, RequestResponseError, RequestResponseEvent, - RequestResponseHandle, RequestResponseProtocol, - }, - InnerTransportEvent, SubstreamError, SubstreamKeepAlive, TransportService, - }, - substream::Substream, - transport::{ - manager::{TransportManager, TransportManagerBuilder}, - KEEP_ALIVE_TIMEOUT, - }, - types::{RequestId, SubstreamId}, - Error, PeerId, ProtocolName, + mock::substream::{DummySubstream, MockSubstream}, + protocol::{ + request_response::{ + ConfigBuilder, DialOptions, RequestResponseError, RequestResponseEvent, + RequestResponseHandle, RequestResponseProtocol, + }, + InnerTransportEvent, SubstreamError, SubstreamKeepAlive, TransportService, + }, + substream::Substream, + transport::{ + manager::{TransportManager, TransportManagerBuilder}, + KEEP_ALIVE_TIMEOUT, + }, + types::{RequestId, SubstreamId}, + Error, PeerId, ProtocolName, }; use futures::StreamExt; @@ -42,208 +42,189 @@ use tokio::sync::mpsc::Sender; use std::task::Poll; // create new protocol for testing -fn protocol() -> ( - RequestResponseProtocol, - RequestResponseHandle, - TransportManager, - Sender, -) { - let manager = TransportManagerBuilder::new().build(); - - let peer = PeerId::random(); - let (transport_service, tx) = TransportService::new( - peer, - ProtocolName::from("/notif/1"), - Vec::new(), - std::sync::Arc::new(Default::default()), - manager.transport_manager_handle(), - KEEP_ALIVE_TIMEOUT, - SubstreamKeepAlive::Yes, - ); - let (config, handle) = - ConfigBuilder::new(ProtocolName::from("/req/1")).with_max_size(1024).build(); - - ( - RequestResponseProtocol::new(transport_service, config), - handle, - manager, - tx, - ) +fn protocol( +) -> (RequestResponseProtocol, RequestResponseHandle, TransportManager, Sender) +{ + let manager = TransportManagerBuilder::new().build(); + + let peer = PeerId::random(); + let (transport_service, tx) = TransportService::new( + peer, + ProtocolName::from("/notif/1"), + Vec::new(), + std::sync::Arc::new(Default::default()), + manager.transport_manager_handle(), + KEEP_ALIVE_TIMEOUT, + SubstreamKeepAlive::Yes, + ); + let (config, handle) = + ConfigBuilder::new(ProtocolName::from("/req/1")).with_max_size(1024).build(); + + (RequestResponseProtocol::new(transport_service, config), handle, manager, tx) } #[tokio::test] #[cfg(debug_assertions)] #[should_panic] async fn connection_closed_twice() { - let (mut protocol, _handle, _manager, _tx) = protocol(); + let (mut protocol, _handle, _manager, _tx) = protocol(); - let peer = PeerId::random(); - protocol.on_connection_established(peer).await.unwrap(); - assert!(protocol.peers.contains_key(&peer)); + let peer = PeerId::random(); + protocol.on_connection_established(peer).await.unwrap(); + assert!(protocol.peers.contains_key(&peer)); - protocol.on_connection_established(peer).await.unwrap(); + protocol.on_connection_established(peer).await.unwrap(); } #[tokio::test] #[cfg(debug_assertions)] async fn connection_established_twice() { - let (mut protocol, _handle, _manager, _tx) = protocol(); + let (mut protocol, _handle, _manager, _tx) = protocol(); - let peer = PeerId::random(); - protocol.on_connection_established(peer).await.unwrap(); - assert!(protocol.peers.contains_key(&peer)); + let peer = PeerId::random(); + protocol.on_connection_established(peer).await.unwrap(); + assert!(protocol.peers.contains_key(&peer)); - protocol.on_connection_closed(peer).await; - assert!(!protocol.peers.contains_key(&peer)); + protocol.on_connection_closed(peer).await; + assert!(!protocol.peers.contains_key(&peer)); - protocol.on_connection_closed(peer).await; + protocol.on_connection_closed(peer).await; } #[tokio::test] #[cfg(debug_assertions)] #[should_panic] async fn unknown_outbound_substream_opened() { - let (mut protocol, _handle, _manager, _tx) = protocol(); - let peer = PeerId::random(); - - match protocol - .on_outbound_substream( - peer, - SubstreamId::from(1337usize), - Substream::new_mock( - peer, - SubstreamId::from(0usize), - Box::new(MockSubstream::new()), - ), - None, - ) - .await - { - Err(Error::InvalidState) => {} - _ => panic!("invalid return value"), - } + let (mut protocol, _handle, _manager, _tx) = protocol(); + let peer = PeerId::random(); + + match protocol + .on_outbound_substream( + peer, + SubstreamId::from(1337usize), + Substream::new_mock(peer, SubstreamId::from(0usize), Box::new(MockSubstream::new())), + None, + ) + .await + { + Err(Error::InvalidState) => {}, + _ => panic!("invalid return value"), + } } #[tokio::test] #[cfg(debug_assertions)] #[should_panic] async fn unknown_substream_open_failure() { - let (mut protocol, _handle, _manager, _tx) = protocol(); - - match protocol - .on_substream_open_failure( - SubstreamId::from(1338usize), - SubstreamError::ConnectionClosed, - ) - .await - { - Err(Error::InvalidState) => {} - _ => panic!("invalid return value"), - } + let (mut protocol, _handle, _manager, _tx) = protocol(); + + match protocol + .on_substream_open_failure(SubstreamId::from(1338usize), SubstreamError::ConnectionClosed) + .await + { + Err(Error::InvalidState) => {}, + _ => panic!("invalid return value"), + } } #[tokio::test] async fn cancel_unknown_request() { - let (mut protocol, _handle, _manager, _tx) = protocol(); + let (mut protocol, _handle, _manager, _tx) = protocol(); - let request_id = RequestId::from(1337usize); - assert!(!protocol.pending_outbound_cancels.contains_key(&request_id)); - assert!(protocol.on_cancel_request(request_id).is_ok()); + let request_id = RequestId::from(1337usize); + assert!(!protocol.pending_outbound_cancels.contains_key(&request_id)); + assert!(protocol.on_cancel_request(request_id).is_ok()); } #[tokio::test] async fn substream_event_for_unknown_peer() { - let (mut protocol, _handle, _manager, _tx) = protocol(); - - // register peer - let peer = PeerId::random(); - protocol.on_connection_established(peer).await.unwrap(); - assert!(protocol.peers.contains_key(&peer)); - - match protocol - .on_substream_event(peer, RequestId::from(1337usize), None, Ok(vec![13, 37])) - .await - { - Err(Error::InvalidState) => {} - _ => panic!("invalid return value"), - } + let (mut protocol, _handle, _manager, _tx) = protocol(); + + // register peer + let peer = PeerId::random(); + protocol.on_connection_established(peer).await.unwrap(); + assert!(protocol.peers.contains_key(&peer)); + + match protocol + .on_substream_event(peer, RequestId::from(1337usize), None, Ok(vec![13, 37])) + .await + { + Err(Error::InvalidState) => {}, + _ => panic!("invalid return value"), + } } #[tokio::test] async fn inbound_substream_error() { - let (mut protocol, _handle, _manager, _tx) = protocol(); - - // register peer - let peer = PeerId::random(); - protocol.on_connection_established(peer).await.unwrap(); - assert!(protocol.peers.contains_key(&peer)); - - let mut substream = MockSubstream::new(); - substream - .expect_poll_next() - .times(1) - .return_once(|_| Poll::Ready(Some(Err(SubstreamError::ConnectionClosed)))); - - // register inbound substream from peer - protocol - .on_inbound_substream( - peer, - None, - Substream::new_mock(peer, SubstreamId::from(0usize), Box::new(substream)), - ) - .await - .unwrap(); - - // poll the substream and get the failure event - assert_eq!(protocol.pending_inbound_requests.len(), 1); - let (peer, request_id, event, substream) = - protocol.pending_inbound_requests.next().await.unwrap(); - - match protocol.on_inbound_request(peer, request_id, event, substream).await { - Err(Error::InvalidData) => {} - _ => panic!("invalid return value"), - } + let (mut protocol, _handle, _manager, _tx) = protocol(); + + // register peer + let peer = PeerId::random(); + protocol.on_connection_established(peer).await.unwrap(); + assert!(protocol.peers.contains_key(&peer)); + + let mut substream = MockSubstream::new(); + substream + .expect_poll_next() + .times(1) + .return_once(|_| Poll::Ready(Some(Err(SubstreamError::ConnectionClosed)))); + + // register inbound substream from peer + protocol + .on_inbound_substream( + peer, + None, + Substream::new_mock(peer, SubstreamId::from(0usize), Box::new(substream)), + ) + .await + .unwrap(); + + // poll the substream and get the failure event + assert_eq!(protocol.pending_inbound_requests.len(), 1); + let (peer, request_id, event, substream) = + protocol.pending_inbound_requests.next().await.unwrap(); + + match protocol.on_inbound_request(peer, request_id, event, substream).await { + Err(Error::InvalidData) => {}, + _ => panic!("invalid return value"), + } } // when a peer who had an active inbound substream disconnects, verify that the substream is removed // from `pending_inbound_requests` so it doesn't generate new wake-up notifications #[tokio::test] async fn disconnect_peer_has_active_inbound_substream() { - let _ = tracing_subscriber::fmt() - .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) - .try_init(); - - let (mut protocol, mut handle, _manager, _tx) = protocol(); - - // register new peer - let peer = PeerId::random(); - protocol.on_connection_established(peer).await.unwrap(); - - // register inbound substream from peer - protocol - .on_inbound_substream( - peer, - None, - Substream::new_mock( - peer, - SubstreamId::from(0usize), - Box::new(DummySubstream::new()), - ), - ) - .await - .unwrap(); - - assert_eq!(protocol.pending_inbound_requests.len(), 1); - - // disconnect the peer and verify that no events are read from the handle - // since no outbound request was initiated - protocol.on_connection_closed(peer).await; - - futures::future::poll_fn(|cx| match handle.poll_next_unpin(cx) { - Poll::Pending => Poll::Ready(()), - event => panic!("read an unexpected event from handle: {event:?}"), - }) - .await; + let _ = tracing_subscriber::fmt() + .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) + .try_init(); + + let (mut protocol, mut handle, _manager, _tx) = protocol(); + + // register new peer + let peer = PeerId::random(); + protocol.on_connection_established(peer).await.unwrap(); + + // register inbound substream from peer + protocol + .on_inbound_substream( + peer, + None, + Substream::new_mock(peer, SubstreamId::from(0usize), Box::new(DummySubstream::new())), + ) + .await + .unwrap(); + + assert_eq!(protocol.pending_inbound_requests.len(), 1); + + // disconnect the peer and verify that no events are read from the handle + // since no outbound request was initiated + protocol.on_connection_closed(peer).await; + + futures::future::poll_fn(|cx| match handle.poll_next_unpin(cx) { + Poll::Pending => Poll::Ready(()), + event => panic!("read an unexpected event from handle: {event:?}"), + }) + .await; } // when user initiates an outbound request and `RequestResponseProtocol` tries to open an outbound @@ -251,51 +232,41 @@ async fn disconnect_peer_has_active_inbound_substream() { // later disconnects, this failure should not be reported again. #[tokio::test] async fn request_failure_reported_once() { - let _ = tracing_subscriber::fmt() - .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) - .try_init(); - - let (mut protocol, mut handle, _manager, _tx) = protocol(); - - // register new peer - let peer = PeerId::random(); - protocol.on_connection_established(peer).await.unwrap(); - - // initiate outbound request - // - // since the peer wasn't properly registered, opening substream to them will fail - let request_id = RequestId::from(1337usize); - let error = protocol - .on_send_request( - peer, - request_id, - vec![1, 2, 3, 4], - DialOptions::Reject, - None, - ) - .unwrap_err(); - protocol.report_request_failure(peer, request_id, error).await.unwrap(); - - match handle.next().await { - Some(RequestResponseEvent::RequestFailed { - peer: request_peer, - request_id, - error, - }) => { - assert_eq!(request_peer, peer); - assert_eq!(request_id, RequestId::from(1337usize)); - assert!(matches!(error, RequestResponseError::Rejected(_))); - } - event => panic!("unexpected event: {event:?}"), - } - - // disconnect the peer and verify that no events are read from the handle - // since the outbound request failure was already reported - protocol.on_connection_closed(peer).await; - - futures::future::poll_fn(|cx| match handle.poll_next_unpin(cx) { - Poll::Pending => Poll::Ready(()), - event => panic!("read an unexpected event from handle: {event:?}"), - }) - .await; + let _ = tracing_subscriber::fmt() + .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) + .try_init(); + + let (mut protocol, mut handle, _manager, _tx) = protocol(); + + // register new peer + let peer = PeerId::random(); + protocol.on_connection_established(peer).await.unwrap(); + + // initiate outbound request + // + // since the peer wasn't properly registered, opening substream to them will fail + let request_id = RequestId::from(1337usize); + let error = protocol + .on_send_request(peer, request_id, vec![1, 2, 3, 4], DialOptions::Reject, None) + .unwrap_err(); + protocol.report_request_failure(peer, request_id, error).await.unwrap(); + + match handle.next().await { + Some(RequestResponseEvent::RequestFailed { peer: request_peer, request_id, error }) => { + assert_eq!(request_peer, peer); + assert_eq!(request_id, RequestId::from(1337usize)); + assert!(matches!(error, RequestResponseError::Rejected(_))); + }, + event => panic!("unexpected event: {event:?}"), + } + + // disconnect the peer and verify that no events are read from the handle + // since the outbound request failure was already reported + protocol.on_connection_closed(peer).await; + + futures::future::poll_fn(|cx| match handle.poll_next_unpin(cx) { + Poll::Pending => Poll::Ready(()), + event => panic!("read an unexpected event from handle: {event:?}"), + }) + .await; } diff --git a/client/litep2p/src/protocol/transport_service.rs b/client/litep2p/src/protocol/transport_service.rs index 5d5c69d3..8fd170c9 100644 --- a/client/litep2p/src/protocol/transport_service.rs +++ b/client/litep2p/src/protocol/transport_service.rs @@ -19,12 +19,12 @@ // DEALINGS IN THE SOFTWARE. use crate::{ - addresses::PublicAddresses, - error::{Error, ImmediateDialError, SubstreamError}, - protocol::{connection::ConnectionHandle, InnerTransportEvent, TransportEvent}, - transport::{manager::TransportManagerHandle, Endpoint}, - types::{protocol::ProtocolName, ConnectionId, SubstreamId}, - PeerId, DEFAULT_CHANNEL_SIZE, + addresses::PublicAddresses, + error::{Error, ImmediateDialError, SubstreamError}, + protocol::{connection::ConnectionHandle, InnerTransportEvent, TransportEvent}, + transport::{manager::TransportManagerHandle, Endpoint}, + types::{protocol::ProtocolName, ConnectionId, SubstreamId}, + PeerId, DEFAULT_CHANNEL_SIZE, }; use futures::{future::BoxFuture, stream::FuturesUnordered, Stream, StreamExt}; @@ -33,15 +33,15 @@ use multihash::Multihash; use tokio::sync::mpsc::{channel, Receiver, Sender}; use std::{ - collections::{HashMap, HashSet}, - fmt::Debug, - pin::Pin, - sync::{ - atomic::{AtomicUsize, Ordering}, - Arc, - }, - task::{Context, Poll, Waker}, - time::{Duration, Instant}, + collections::{HashMap, HashSet}, + fmt::Debug, + pin::Pin, + sync::{ + atomic::{AtomicUsize, Ordering}, + Arc, + }, + task::{Context, Poll, Waker}, + time::{Duration, Instant}, }; /// Logging target for the file. @@ -57,68 +57,65 @@ const LOG_TARGET: &str = "litep2p::transport-service"; /// while the secondary connections remains open. #[derive(Debug)] struct ConnectionContext { - /// Primary connection. - primary: ConnectionHandle, + /// Primary connection. + primary: ConnectionHandle, - /// Secondary connection, if it exists. - secondary: Option, + /// Secondary connection, if it exists. + secondary: Option, } impl ConnectionContext { - /// Create new [`ConnectionContext`]. - fn new(primary: ConnectionHandle) -> Self { - Self { - primary, - secondary: None, - } - } - - /// Downgrade connection to non-active which means it will be closed - /// if there are no substreams open over it. - fn downgrade(&mut self, connection_id: &ConnectionId) { - if self.primary.connection_id() == connection_id { - self.primary.close(); - return; - } - - if let Some(handle) = &mut self.secondary { - if handle.connection_id() == connection_id { - handle.close(); - return; - } - } - - tracing::debug!( - target: LOG_TARGET, - primary = ?self.primary.connection_id(), - secondary = ?self.secondary.as_ref().map(|handle| handle.connection_id()), - ?connection_id, - "connection doesn't exist, cannot downgrade", - ); - } - - /// Try to upgrade the connection to active state. - fn try_upgrade(&mut self, connection_id: &ConnectionId) { - if self.primary.connection_id() == connection_id { - self.primary.try_upgrade(); - return; - } - - if let Some(handle) = &mut self.secondary { - if handle.connection_id() == connection_id { - handle.try_upgrade(); - return; - } - } - - tracing::debug!( - target: LOG_TARGET, - primary = ?self.primary.connection_id(), - secondary = ?self.secondary.as_ref().map(|handle| handle.connection_id()), - ?connection_id, - "connection doesn't exist, cannot upgrade", - ); - } + /// Create new [`ConnectionContext`]. + fn new(primary: ConnectionHandle) -> Self { + Self { primary, secondary: None } + } + + /// Downgrade connection to non-active which means it will be closed + /// if there are no substreams open over it. + fn downgrade(&mut self, connection_id: &ConnectionId) { + if self.primary.connection_id() == connection_id { + self.primary.close(); + return; + } + + if let Some(handle) = &mut self.secondary { + if handle.connection_id() == connection_id { + handle.close(); + return; + } + } + + tracing::debug!( + target: LOG_TARGET, + primary = ?self.primary.connection_id(), + secondary = ?self.secondary.as_ref().map(|handle| handle.connection_id()), + ?connection_id, + "connection doesn't exist, cannot downgrade", + ); + } + + /// Try to upgrade the connection to active state. + fn try_upgrade(&mut self, connection_id: &ConnectionId) { + if self.primary.connection_id() == connection_id { + self.primary.try_upgrade(); + return; + } + + if let Some(handle) = &mut self.secondary { + if handle.connection_id() == connection_id { + handle.try_upgrade(); + return; + } + } + + tracing::debug!( + target: LOG_TARGET, + primary = ?self.primary.connection_id(), + secondary = ?self.secondary.as_ref().map(|handle| handle.connection_id()), + ?connection_id, + "connection doesn't exist, cannot upgrade", + ); + } } /// Tracks connection keep-alive timeouts. @@ -129,1595 +126,1525 @@ impl ConnectionContext { /// the timeout is reset. #[derive(Debug)] struct KeepAliveTracker { - /// Close the connection if no substreams are open within this time frame. - keep_alive_timeout: Duration, + /// Close the connection if no substreams are open within this time frame. + keep_alive_timeout: Duration, - /// Track substream last activity. - last_activity: HashMap<(PeerId, ConnectionId), Instant>, + /// Track substream last activity. + last_activity: HashMap<(PeerId, ConnectionId), Instant>, - /// Pending keep-alive timeouts. - pending_keep_alive_timeouts: FuturesUnordered>, + /// Pending keep-alive timeouts. + pending_keep_alive_timeouts: FuturesUnordered>, - /// Saved waker. - waker: Option, + /// Saved waker. + waker: Option, } impl KeepAliveTracker { - /// Create new [`KeepAliveTracker`]. - pub fn new(keep_alive_timeout: Duration) -> Self { - Self { - keep_alive_timeout, - last_activity: HashMap::new(), - pending_keep_alive_timeouts: FuturesUnordered::new(), - waker: None, - } - } - - /// Called on connection established event to add a new keep-alive timeout. - pub fn on_connection_established(&mut self, peer: PeerId, connection_id: ConnectionId) { - self.substream_activity(peer, connection_id); - } - - /// Called on connection closed event. - pub fn on_connection_closed(&mut self, peer: PeerId, connection_id: ConnectionId) { - self.last_activity.remove(&(peer, connection_id)); - } - - /// Called on substream opened event to track the last activity. - pub fn substream_activity(&mut self, peer: PeerId, connection_id: ConnectionId) { - // Keep track of the connection ID and the time the substream was opened. - if self.last_activity.insert((peer, connection_id), Instant::now()).is_none() { - // Refill futures if there is no pending keep-alive timeout. - let timeout = self.keep_alive_timeout; - self.pending_keep_alive_timeouts.push(Box::pin(async move { - tokio::time::sleep(timeout).await; - (peer, connection_id) - })); - } - - tracing::trace!( - target: LOG_TARGET, - ?peer, - ?connection_id, - ?self.keep_alive_timeout, - last_activity = ?self.last_activity.len(), - pending_keep_alive_timeouts = ?self.pending_keep_alive_timeouts.len(), - "substream activity", - ); - - // Wake any pending poll. - if let Some(waker) = self.waker.take() { - waker.wake() - } - } + /// Create new [`KeepAliveTracker`]. + pub fn new(keep_alive_timeout: Duration) -> Self { + Self { + keep_alive_timeout, + last_activity: HashMap::new(), + pending_keep_alive_timeouts: FuturesUnordered::new(), + waker: None, + } + } + + /// Called on connection established event to add a new keep-alive timeout. + pub fn on_connection_established(&mut self, peer: PeerId, connection_id: ConnectionId) { + self.substream_activity(peer, connection_id); + } + + /// Called on connection closed event. + pub fn on_connection_closed(&mut self, peer: PeerId, connection_id: ConnectionId) { + self.last_activity.remove(&(peer, connection_id)); + } + + /// Called on substream opened event to track the last activity. + pub fn substream_activity(&mut self, peer: PeerId, connection_id: ConnectionId) { + // Keep track of the connection ID and the time the substream was opened. + if self.last_activity.insert((peer, connection_id), Instant::now()).is_none() { + // Refill futures if there is no pending keep-alive timeout. + let timeout = self.keep_alive_timeout; + self.pending_keep_alive_timeouts.push(Box::pin(async move { + tokio::time::sleep(timeout).await; + (peer, connection_id) + })); + } + + tracing::trace!( + target: LOG_TARGET, + ?peer, + ?connection_id, + ?self.keep_alive_timeout, + last_activity = ?self.last_activity.len(), + pending_keep_alive_timeouts = ?self.pending_keep_alive_timeouts.len(), + "substream activity", + ); + + // Wake any pending poll. + if let Some(waker) = self.waker.take() { + waker.wake() + } + } } impl Stream for KeepAliveTracker { - type Item = (PeerId, ConnectionId); - - fn poll_next(mut self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll> { - if self.pending_keep_alive_timeouts.is_empty() { - // No pending keep-alive timeouts. - self.waker = Some(cx.waker().clone()); - return Poll::Pending; - } - - match self.pending_keep_alive_timeouts.poll_next_unpin(cx) { - Poll::Ready(Some(key)) => { - // Check last-activity time. - let Some(last_activity) = self.last_activity.get(&key) else { - tracing::debug!( - target: LOG_TARGET, - peer = ?key.0, - connection_id = ?key.1, - "Last activity no longer tracks the connection (closed event triggered)", - ); - - // We have effectively ignored this `Poll::Ready` event. To prevent the - // future from getting stuck, we need to tell the executor to poll again - // for more events. - cx.waker().wake_by_ref(); - return Poll::Pending; - }; - - // Keep-alive timeout not reached yet. - let inactive_for = last_activity.elapsed(); - if inactive_for < self.keep_alive_timeout { - let timeout = self.keep_alive_timeout.saturating_sub(inactive_for); - - tracing::trace!( - target: LOG_TARGET, - peer = ?key.0, - connection_id = ?key.1, - ?timeout, - "keep-alive timeout not yet reached", - ); - - // Refill the keep alive timeouts. - self.pending_keep_alive_timeouts.push(Box::pin(async move { - tokio::time::sleep(timeout).await; - key - })); - - // This is similar to the `last_activity` check above, we need to inform - // the executor that this object may produce more events. - cx.waker().wake_by_ref(); - return Poll::Pending; - } - - // Keep-alive timeout reached. - tracing::debug!( - target: LOG_TARGET, - peer = ?key.0, - connection_id = ?key.1, - "keep-alive timeout triggered", - ); - self.last_activity.remove(&key); - Poll::Ready(Some(key)) - } - Poll::Ready(None) | Poll::Pending => Poll::Pending, - } - } + type Item = (PeerId, ConnectionId); + + fn poll_next(mut self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll> { + if self.pending_keep_alive_timeouts.is_empty() { + // No pending keep-alive timeouts. + self.waker = Some(cx.waker().clone()); + return Poll::Pending; + } + + match self.pending_keep_alive_timeouts.poll_next_unpin(cx) { + Poll::Ready(Some(key)) => { + // Check last-activity time. + let Some(last_activity) = self.last_activity.get(&key) else { + tracing::debug!( + target: LOG_TARGET, + peer = ?key.0, + connection_id = ?key.1, + "Last activity no longer tracks the connection (closed event triggered)", + ); + + // We have effectively ignored this `Poll::Ready` event. To prevent the + // future from getting stuck, we need to tell the executor to poll again + // for more events. + cx.waker().wake_by_ref(); + return Poll::Pending; + }; + + // Keep-alive timeout not reached yet. + let inactive_for = last_activity.elapsed(); + if inactive_for < self.keep_alive_timeout { + let timeout = self.keep_alive_timeout.saturating_sub(inactive_for); + + tracing::trace!( + target: LOG_TARGET, + peer = ?key.0, + connection_id = ?key.1, + ?timeout, + "keep-alive timeout not yet reached", + ); + + // Refill the keep alive timeouts. + self.pending_keep_alive_timeouts.push(Box::pin(async move { + tokio::time::sleep(timeout).await; + key + })); + + // This is similar to the `last_activity` check above, we need to inform + // the executor that this object may produce more events. + cx.waker().wake_by_ref(); + return Poll::Pending; + } + + // Keep-alive timeout reached. + tracing::debug!( + target: LOG_TARGET, + peer = ?key.0, + connection_id = ?key.1, + "keep-alive timeout triggered", + ); + self.last_activity.remove(&key); + Poll::Ready(Some(key)) + }, + Poll::Ready(None) | Poll::Pending => Poll::Pending, + } + } } /// Whether this protocol substream activity can keep connection alive. #[derive(Debug, Clone, Copy, PartialEq, Eq)] pub enum SubstreamKeepAlive { - /// Yes. - Yes, - /// No. - No, + /// Yes. + Yes, + /// No. + No, } impl SubstreamKeepAlive { - /// Shortcut to `(self == SubstreamKeepAlive::Yes).then()`. - #[inline] - pub fn then T>(&self, f: F) -> Option { - (*self == SubstreamKeepAlive::Yes).then(f) - } + /// Shortcut to `(self == SubstreamKeepAlive::Yes).then()`. + #[inline] + pub fn then T>(&self, f: F) -> Option { + (*self == SubstreamKeepAlive::Yes).then(f) + } } /// Provides an interfaces for [`Litep2p`](crate::Litep2p) protocols to interact /// with the underlying transport protocols. #[derive(Debug)] pub struct TransportService { - /// Local peer ID. - local_peer_id: PeerId, + /// Local peer ID. + local_peer_id: PeerId, - /// Protocol. - protocol: ProtocolName, + /// Protocol. + protocol: ProtocolName, - /// Fallback names for the protocol. - fallback_names: Vec, + /// Fallback names for the protocol. + fallback_names: Vec, - /// Open connections. - connections: HashMap, + /// Open connections. + connections: HashMap, - /// Transport handle. - transport_handle: TransportManagerHandle, + /// Transport handle. + transport_handle: TransportManagerHandle, - /// RX channel for receiving events from tranports and connections. - rx: Receiver, + /// RX channel for receiving events from tranports and connections. + rx: Receiver, - /// Next substream ID. - next_substream_id: Arc, + /// Next substream ID. + next_substream_id: Arc, - /// Close the connection if no substreams are open within this time frame. - keep_alive_tracker: KeepAliveTracker, + /// Close the connection if no substreams are open within this time frame. + keep_alive_tracker: KeepAliveTracker, - /// Whether this protocol susbstreams should keep connection alive. - substream_keep_alive: SubstreamKeepAlive, + /// Whether this protocol susbstreams should keep connection alive. + substream_keep_alive: SubstreamKeepAlive, } impl TransportService { - /// Create new [`TransportService`]. - pub(crate) fn new( - local_peer_id: PeerId, - protocol: ProtocolName, - fallback_names: Vec, - next_substream_id: Arc, - transport_handle: TransportManagerHandle, - keep_alive_timeout: Duration, - substream_keep_alive: SubstreamKeepAlive, - ) -> (Self, Sender) { - let (tx, rx) = channel(DEFAULT_CHANNEL_SIZE); - - let keep_alive_tracker = KeepAliveTracker::new(keep_alive_timeout); - - ( - Self { - rx, - protocol, - local_peer_id, - fallback_names, - transport_handle, - next_substream_id, - connections: HashMap::new(), - keep_alive_tracker, - substream_keep_alive, - }, - tx, - ) - } - - /// Get the list of public addresses of the node. - pub fn public_addresses(&self) -> PublicAddresses { - self.transport_handle.public_addresses() - } - - /// Get the list of listen addresses of the node. - pub fn listen_addresses(&self) -> HashSet { - self.transport_handle.listen_addresses() - } - - /// Handle connection established event. - fn on_connection_established( - &mut self, - peer: PeerId, - endpoint: Endpoint, - connection_id: ConnectionId, - handle: ConnectionHandle, - ) -> Option { - tracing::debug!( - target: LOG_TARGET, - ?peer, - ?endpoint, - ?connection_id, - protocol = %self.protocol, - current_state = ?self.connections.get(&peer), - "on connection established", - ); - - match self.connections.get_mut(&peer) { - Some(context) => match context.secondary { - Some(_) => { - tracing::debug!( - target: LOG_TARGET, - ?peer, - ?connection_id, - ?endpoint, - protocol = %self.protocol, - "ignoring third connection", - ); - None - } - None => { - self.keep_alive_tracker.on_connection_established(peer, connection_id); - - tracing::trace!( - target: LOG_TARGET, - ?peer, - ?endpoint, - ?connection_id, - protocol = %self.protocol, - "secondary connection established", - ); - - context.secondary = Some(handle); - - None - } - }, - None => { - tracing::trace!( - target: LOG_TARGET, - ?peer, - ?endpoint, - ?connection_id, - protocol = %self.protocol, - "primary connection established", - ); - - self.connections.insert(peer, ConnectionContext::new(handle)); - - self.keep_alive_tracker.on_connection_established(peer, connection_id); - - Some(TransportEvent::ConnectionEstablished { peer, endpoint }) - } - } - } - - /// Handle connection closed event. - fn on_connection_closed( - &mut self, - peer: PeerId, - connection_id: ConnectionId, - ) -> Option { - tracing::debug!( - target: LOG_TARGET, - ?peer, - ?connection_id, - protocol = %self.protocol, - current_state = ?self.connections.get(&peer), - "on connection closed", - ); - - self.keep_alive_tracker.on_connection_closed(peer, connection_id); - - let Some(context) = self.connections.get_mut(&peer) else { - tracing::warn!( - target: LOG_TARGET, - ?peer, - ?connection_id, - protocol = %self.protocol, - "connection closed to a non-existent peer", - ); - - debug_assert!(false); - return None; - }; - - // if the primary connection was closed, check if there exist a secondary connection - // and if it does, convert the secondary connection a primary connection - if context.primary.connection_id() == &connection_id { - tracing::trace!( - target: LOG_TARGET, - ?peer, - ?connection_id, - protocol = %self.protocol, - "primary connection closed" - ); - - match context.secondary.take() { - None => { - self.connections.remove(&peer); - return Some(TransportEvent::ConnectionClosed { peer }); - } - Some(handle) => { - tracing::debug!( - target: LOG_TARGET, - ?peer, - ?connection_id, - protocol = %self.protocol, - "switch to secondary connection", - ); - - context.primary = handle; - return None; - } - } - } - - match context.secondary.take() { - Some(handle) if handle.connection_id() == &connection_id => { - tracing::trace!( - target: LOG_TARGET, - ?peer, - ?connection_id, - protocol = %self.protocol, - "secondary connection closed", - ); - - None - } - connection_state => { - tracing::debug!( - target: LOG_TARGET, - ?peer, - ?connection_id, - ?connection_state, - protocol = %self.protocol, - "connection closed but it doesn't exist", - ); - - None - } - } - } - - /// Dial `peer` using `PeerId`. - /// - /// Call fails if `Litep2p` doesn't have a known address for the peer. - pub fn dial(&mut self, peer: &PeerId) -> Result<(), ImmediateDialError> { - tracing::trace!( - target: LOG_TARGET, - ?peer, - protocol = %self.protocol, - "Dial peer requested", - ); - - self.transport_handle.dial(peer) - } - - /// Dial peer using a `Multiaddr`. - /// - /// Call fails if the address is not in correct format or it contains an unsupported/disabled - /// transport. - /// - /// Calling this function is only necessary for those addresses that are discovered out-of-band - /// since `Litep2p` internally keeps track of all peer addresses it has learned through user - /// calling this function, Kademlia peer discoveries and `Identify` responses. - pub fn dial_address(&mut self, address: Multiaddr) -> Result<(), ImmediateDialError> { - tracing::trace!( - target: LOG_TARGET, - ?address, - protocol = %self.protocol, - "Dial address requested", - ); - - self.transport_handle.dial_address(address) - } - - /// Add one or more addresses for `peer`. - /// - /// The list is filtered for duplicates and unsupported transports. - pub fn add_known_address(&mut self, peer: &PeerId, addresses: impl Iterator) { - let addresses: HashSet = addresses - .filter_map(|address| { - if !std::matches!(address.iter().last(), Some(Protocol::P2p(_))) { - Some(address.with(Protocol::P2p(Multihash::from_bytes(&peer.to_bytes()).ok()?))) - } else { - Some(address) - } - }) - .collect(); - - self.transport_handle.add_known_address(peer, addresses.into_iter()); - } - - /// Open substream to `peer`. - /// - /// Call fails if there is no connection open to `peer` or the channel towards - /// the connection is clogged. - pub fn open_substream(&mut self, peer: PeerId) -> Result { - // always prefer the primary connection - let connection = &mut self - .connections - .get_mut(&peer) - .ok_or(SubstreamError::PeerDoesNotExist(peer))? - .primary; - - let connection_id = *connection.connection_id(); - - // This permit will be passed on until the substream is reported back to - // [`TransportService`] in [`InnerTransportEvent::SubstreamOpened`] and connection - // upgraded. - let permit = connection.try_get_permit().ok_or(SubstreamError::ConnectionClosed)?; - - let substream_id = - SubstreamId::from(self.next_substream_id.fetch_add(1usize, Ordering::Relaxed)); - - tracing::trace!( - target: LOG_TARGET, - ?peer, - protocol = %self.protocol, - ?substream_id, - ?connection_id, - "open substream", - ); - - if self.substream_keep_alive == SubstreamKeepAlive::Yes { - self.keep_alive_tracker.substream_activity(peer, connection_id); - connection.try_upgrade(); - } - - connection - .open_substream( - self.protocol.clone(), - self.fallback_names.clone(), - substream_id, - permit, - self.substream_keep_alive, - ) - .map(|_| substream_id) - } - - /// Forcibly close the connection, even if other protocols have substreams open over it. - pub fn force_close(&mut self, peer: PeerId) -> crate::Result<()> { - let connection = - &mut self.connections.get_mut(&peer).ok_or(Error::PeerDoesntExist(peer))?; - - tracing::trace!( - target: LOG_TARGET, - ?peer, - protocol = %self.protocol, - secondary = ?connection.secondary, - "forcibly closing the connection", - ); - - if let Some(ref mut connection) = connection.secondary { - let _ = connection.force_close(); - } - - connection.primary.force_close() - } - - /// Get local peer ID. - pub fn local_peer_id(&self) -> PeerId { - self.local_peer_id - } - - /// Dynamically unregister a protocol. - /// - /// This must be called when a protocol is no longer needed (e.g. user dropped the protocol - /// handle). - pub fn unregister_protocol(&self) { - self.transport_handle.unregister_protocol(self.protocol.clone()); - } + /// Create new [`TransportService`]. + pub(crate) fn new( + local_peer_id: PeerId, + protocol: ProtocolName, + fallback_names: Vec, + next_substream_id: Arc, + transport_handle: TransportManagerHandle, + keep_alive_timeout: Duration, + substream_keep_alive: SubstreamKeepAlive, + ) -> (Self, Sender) { + let (tx, rx) = channel(DEFAULT_CHANNEL_SIZE); + + let keep_alive_tracker = KeepAliveTracker::new(keep_alive_timeout); + + ( + Self { + rx, + protocol, + local_peer_id, + fallback_names, + transport_handle, + next_substream_id, + connections: HashMap::new(), + keep_alive_tracker, + substream_keep_alive, + }, + tx, + ) + } + + /// Get the list of public addresses of the node. + pub fn public_addresses(&self) -> PublicAddresses { + self.transport_handle.public_addresses() + } + + /// Get the list of listen addresses of the node. + pub fn listen_addresses(&self) -> HashSet { + self.transport_handle.listen_addresses() + } + + /// Handle connection established event. + fn on_connection_established( + &mut self, + peer: PeerId, + endpoint: Endpoint, + connection_id: ConnectionId, + handle: ConnectionHandle, + ) -> Option { + tracing::debug!( + target: LOG_TARGET, + ?peer, + ?endpoint, + ?connection_id, + protocol = %self.protocol, + current_state = ?self.connections.get(&peer), + "on connection established", + ); + + match self.connections.get_mut(&peer) { + Some(context) => match context.secondary { + Some(_) => { + tracing::debug!( + target: LOG_TARGET, + ?peer, + ?connection_id, + ?endpoint, + protocol = %self.protocol, + "ignoring third connection", + ); + None + }, + None => { + self.keep_alive_tracker.on_connection_established(peer, connection_id); + + tracing::trace!( + target: LOG_TARGET, + ?peer, + ?endpoint, + ?connection_id, + protocol = %self.protocol, + "secondary connection established", + ); + + context.secondary = Some(handle); + + None + }, + }, + None => { + tracing::trace!( + target: LOG_TARGET, + ?peer, + ?endpoint, + ?connection_id, + protocol = %self.protocol, + "primary connection established", + ); + + self.connections.insert(peer, ConnectionContext::new(handle)); + + self.keep_alive_tracker.on_connection_established(peer, connection_id); + + Some(TransportEvent::ConnectionEstablished { peer, endpoint }) + }, + } + } + + /// Handle connection closed event. + fn on_connection_closed( + &mut self, + peer: PeerId, + connection_id: ConnectionId, + ) -> Option { + tracing::debug!( + target: LOG_TARGET, + ?peer, + ?connection_id, + protocol = %self.protocol, + current_state = ?self.connections.get(&peer), + "on connection closed", + ); + + self.keep_alive_tracker.on_connection_closed(peer, connection_id); + + let Some(context) = self.connections.get_mut(&peer) else { + tracing::warn!( + target: LOG_TARGET, + ?peer, + ?connection_id, + protocol = %self.protocol, + "connection closed to a non-existent peer", + ); + + debug_assert!(false); + return None; + }; + + // if the primary connection was closed, check if there exist a secondary connection + // and if it does, convert the secondary connection a primary connection + if context.primary.connection_id() == &connection_id { + tracing::trace!( + target: LOG_TARGET, + ?peer, + ?connection_id, + protocol = %self.protocol, + "primary connection closed" + ); + + match context.secondary.take() { + None => { + self.connections.remove(&peer); + return Some(TransportEvent::ConnectionClosed { peer }); + }, + Some(handle) => { + tracing::debug!( + target: LOG_TARGET, + ?peer, + ?connection_id, + protocol = %self.protocol, + "switch to secondary connection", + ); + + context.primary = handle; + return None; + }, + } + } + + match context.secondary.take() { + Some(handle) if handle.connection_id() == &connection_id => { + tracing::trace!( + target: LOG_TARGET, + ?peer, + ?connection_id, + protocol = %self.protocol, + "secondary connection closed", + ); + + None + }, + connection_state => { + tracing::debug!( + target: LOG_TARGET, + ?peer, + ?connection_id, + ?connection_state, + protocol = %self.protocol, + "connection closed but it doesn't exist", + ); + + None + }, + } + } + + /// Dial `peer` using `PeerId`. + /// + /// Call fails if `Litep2p` doesn't have a known address for the peer. + pub fn dial(&mut self, peer: &PeerId) -> Result<(), ImmediateDialError> { + tracing::trace!( + target: LOG_TARGET, + ?peer, + protocol = %self.protocol, + "Dial peer requested", + ); + + self.transport_handle.dial(peer) + } + + /// Dial peer using a `Multiaddr`. + /// + /// Call fails if the address is not in correct format or it contains an unsupported/disabled + /// transport. + /// + /// Calling this function is only necessary for those addresses that are discovered out-of-band + /// since `Litep2p` internally keeps track of all peer addresses it has learned through user + /// calling this function, Kademlia peer discoveries and `Identify` responses. + pub fn dial_address(&mut self, address: Multiaddr) -> Result<(), ImmediateDialError> { + tracing::trace!( + target: LOG_TARGET, + ?address, + protocol = %self.protocol, + "Dial address requested", + ); + + self.transport_handle.dial_address(address) + } + + /// Add one or more addresses for `peer`. + /// + /// The list is filtered for duplicates and unsupported transports. + pub fn add_known_address(&mut self, peer: &PeerId, addresses: impl Iterator) { + let addresses: HashSet = addresses + .filter_map(|address| { + if !std::matches!(address.iter().last(), Some(Protocol::P2p(_))) { + Some(address.with(Protocol::P2p(Multihash::from_bytes(&peer.to_bytes()).ok()?))) + } else { + Some(address) + } + }) + .collect(); + + self.transport_handle.add_known_address(peer, addresses.into_iter()); + } + + /// Open substream to `peer`. + /// + /// Call fails if there is no connection open to `peer` or the channel towards + /// the connection is clogged. + pub fn open_substream(&mut self, peer: PeerId) -> Result { + // always prefer the primary connection + let connection = &mut self + .connections + .get_mut(&peer) + .ok_or(SubstreamError::PeerDoesNotExist(peer))? + .primary; + + let connection_id = *connection.connection_id(); + + // This permit will be passed on until the substream is reported back to + // [`TransportService`] in [`InnerTransportEvent::SubstreamOpened`] and connection + // upgraded. + let permit = connection.try_get_permit().ok_or(SubstreamError::ConnectionClosed)?; + + let substream_id = + SubstreamId::from(self.next_substream_id.fetch_add(1usize, Ordering::Relaxed)); + + tracing::trace!( + target: LOG_TARGET, + ?peer, + protocol = %self.protocol, + ?substream_id, + ?connection_id, + "open substream", + ); + + if self.substream_keep_alive == SubstreamKeepAlive::Yes { + self.keep_alive_tracker.substream_activity(peer, connection_id); + connection.try_upgrade(); + } + + connection + .open_substream( + self.protocol.clone(), + self.fallback_names.clone(), + substream_id, + permit, + self.substream_keep_alive, + ) + .map(|_| substream_id) + } + + /// Forcibly close the connection, even if other protocols have substreams open over it. + pub fn force_close(&mut self, peer: PeerId) -> crate::Result<()> { + let connection = + &mut self.connections.get_mut(&peer).ok_or(Error::PeerDoesntExist(peer))?; + + tracing::trace!( + target: LOG_TARGET, + ?peer, + protocol = %self.protocol, + secondary = ?connection.secondary, + "forcibly closing the connection", + ); + + if let Some(ref mut connection) = connection.secondary { + let _ = connection.force_close(); + } + + connection.primary.force_close() + } + + /// Get local peer ID. + pub fn local_peer_id(&self) -> PeerId { + self.local_peer_id + } + + /// Dynamically unregister a protocol. + /// + /// This must be called when a protocol is no longer needed (e.g. user dropped the protocol + /// handle). + pub fn unregister_protocol(&self) { + self.transport_handle.unregister_protocol(self.protocol.clone()); + } } impl Stream for TransportService { - type Item = TransportEvent; - - fn poll_next(mut self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll> { - let protocol_name = self.protocol.clone(); - let keep_alive_timeout = self.keep_alive_tracker.keep_alive_timeout; - - while let Poll::Ready(event) = self.rx.poll_recv(cx) { - match event { - None => { - tracing::warn!( - target: LOG_TARGET, - protocol = ?protocol_name, - "transport service closed" - ); - return Poll::Ready(None); - } - Some(InnerTransportEvent::ConnectionEstablished { - peer, - endpoint, - sender, - connection, - }) => { - if let Some(event) = - self.on_connection_established(peer, endpoint, connection, sender) - { - return Poll::Ready(Some(event)); - } - } - Some(InnerTransportEvent::ConnectionClosed { peer, connection }) => { - if let Some(event) = self.on_connection_closed(peer, connection) { - return Poll::Ready(Some(event)); - } - } - Some(InnerTransportEvent::SubstreamOpened { - peer, - protocol, - fallback, - direction, - substream, - connection_id, - opening_permit, - }) => { - if protocol == self.protocol - && self.substream_keep_alive == SubstreamKeepAlive::Yes - { - self.keep_alive_tracker.substream_activity(peer, connection_id); - if let Some(context) = self.connections.get_mut(&peer) { - context.try_upgrade(&connection_id); - } - } - - // Connection is upgraded, we must now drop the permit. - // This is for the reader, not for compiler. - drop(opening_permit); - - return Poll::Ready(Some(TransportEvent::SubstreamOpened { - peer, - protocol, - fallback, - direction, - substream, - })); - } - Some(event) => return Poll::Ready(Some(event.into())), - } - } - - while let Poll::Ready(Some((peer, connection_id))) = - self.keep_alive_tracker.poll_next_unpin(cx) - { - if let Some(context) = self.connections.get_mut(&peer) { - tracing::debug!( - target: LOG_TARGET, - ?peer, - ?connection_id, - protocol = ?protocol_name, - timeout = ?keep_alive_timeout, - "keep-alive timeout over, downgrade connection", - ); - - context.downgrade(&connection_id); - } - } - - Poll::Pending - } + type Item = TransportEvent; + + fn poll_next(mut self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll> { + let protocol_name = self.protocol.clone(); + let keep_alive_timeout = self.keep_alive_tracker.keep_alive_timeout; + + while let Poll::Ready(event) = self.rx.poll_recv(cx) { + match event { + None => { + tracing::warn!( + target: LOG_TARGET, + protocol = ?protocol_name, + "transport service closed" + ); + return Poll::Ready(None); + }, + Some(InnerTransportEvent::ConnectionEstablished { + peer, + endpoint, + sender, + connection, + }) => { + if let Some(event) = + self.on_connection_established(peer, endpoint, connection, sender) + { + return Poll::Ready(Some(event)); + } + }, + Some(InnerTransportEvent::ConnectionClosed { peer, connection }) => { + if let Some(event) = self.on_connection_closed(peer, connection) { + return Poll::Ready(Some(event)); + } + }, + Some(InnerTransportEvent::SubstreamOpened { + peer, + protocol, + fallback, + direction, + substream, + connection_id, + opening_permit, + }) => { + if protocol == self.protocol && + self.substream_keep_alive == SubstreamKeepAlive::Yes + { + self.keep_alive_tracker.substream_activity(peer, connection_id); + if let Some(context) = self.connections.get_mut(&peer) { + context.try_upgrade(&connection_id); + } + } + + // Connection is upgraded, we must now drop the permit. + // This is for the reader, not for compiler. + drop(opening_permit); + + return Poll::Ready(Some(TransportEvent::SubstreamOpened { + peer, + protocol, + fallback, + direction, + substream, + })); + }, + Some(event) => return Poll::Ready(Some(event.into())), + } + } + + while let Poll::Ready(Some((peer, connection_id))) = + self.keep_alive_tracker.poll_next_unpin(cx) + { + if let Some(context) = self.connections.get_mut(&peer) { + tracing::debug!( + target: LOG_TARGET, + ?peer, + ?connection_id, + protocol = ?protocol_name, + timeout = ?keep_alive_timeout, + "keep-alive timeout over, downgrade connection", + ); + + context.downgrade(&connection_id); + } + } + + Poll::Pending + } } #[cfg(test)] mod tests { - use super::*; - use crate::{ - protocol::{ProtocolCommand, SubstreamKeepAlive, TransportService}, - transport::{ - manager::{handle::InnerTransportManagerCommand, TransportManagerHandle}, - KEEP_ALIVE_TIMEOUT, - }, - }; - use futures::StreamExt; - use parking_lot::RwLock; - use std::collections::HashSet; - - /// Create new `TransportService` - fn transport_service() -> ( - TransportService, - Sender, - Receiver, - ) { - let (cmd_tx, cmd_rx) = channel(64); - let peer = PeerId::random(); - - let handle = TransportManagerHandle::new( - peer, - Arc::new(RwLock::new(HashMap::new())), - cmd_tx, - HashSet::new(), - Default::default(), - PublicAddresses::new(peer), - ); - - let (service, sender) = TransportService::new( - peer, - ProtocolName::from("/notif/1"), - Vec::new(), - Arc::new(AtomicUsize::new(0usize)), - handle, - KEEP_ALIVE_TIMEOUT, - SubstreamKeepAlive::Yes, - ); - - (service, sender, cmd_rx) - } - - #[tokio::test] - async fn secondary_connection_stored() { - let (mut service, sender, _) = transport_service(); - let peer = PeerId::random(); - - // register first connection - let (cmd_tx1, _cmd_rx1) = channel(64); - sender - .send(InnerTransportEvent::ConnectionEstablished { - peer, - connection: ConnectionId::from(0usize), - endpoint: Endpoint::listener(Multiaddr::empty(), ConnectionId::from(0usize)), - sender: ConnectionHandle::new(ConnectionId::from(0usize), cmd_tx1), - }) - .await - .unwrap(); - - if let Some(TransportEvent::ConnectionEstablished { - peer: connected_peer, - endpoint, - }) = service.next().await - { - assert_eq!(connected_peer, peer); - assert_eq!(endpoint.address(), &Multiaddr::empty()); - } else { - panic!("expected event from `TransportService`"); - }; - - // register secondary connection - let (cmd_tx2, _cmd_rx2) = channel(64); - sender - .send(InnerTransportEvent::ConnectionEstablished { - peer, - connection: ConnectionId::from(1usize), - endpoint: Endpoint::listener(Multiaddr::empty(), ConnectionId::from(1usize)), - sender: ConnectionHandle::new(ConnectionId::from(1usize), cmd_tx2), - }) - .await - .unwrap(); - - futures::future::poll_fn(|cx| match service.poll_next_unpin(cx) { - std::task::Poll::Ready(_) => panic!("didn't expect event from `TransportService`"), - std::task::Poll::Pending => std::task::Poll::Ready(()), - }) - .await; - - let context = service.connections.get(&peer).unwrap(); - assert_eq!(context.primary.connection_id(), &ConnectionId::from(0usize)); - assert_eq!( - context.secondary.as_ref().unwrap().connection_id(), - &ConnectionId::from(1usize) - ); - } - - #[tokio::test] - async fn tertiary_connection_ignored() { - let (mut service, sender, _) = transport_service(); - let peer = PeerId::random(); - - // register first connection - let (cmd_tx1, _cmd_rx1) = channel(64); - sender - .send(InnerTransportEvent::ConnectionEstablished { - peer, - connection: ConnectionId::from(0usize), - endpoint: Endpoint::dialer(Multiaddr::empty(), ConnectionId::from(0usize)), - sender: ConnectionHandle::new(ConnectionId::from(0usize), cmd_tx1), - }) - .await - .unwrap(); - - if let Some(TransportEvent::ConnectionEstablished { - peer: connected_peer, - endpoint, - }) = service.next().await - { - assert_eq!(connected_peer, peer); - assert_eq!(endpoint.address(), &Multiaddr::empty()); - } else { - panic!("expected event from `TransportService`"); - }; - - // register secondary connection - let (cmd_tx2, _cmd_rx2) = channel(64); - sender - .send(InnerTransportEvent::ConnectionEstablished { - peer, - connection: ConnectionId::from(1usize), - endpoint: Endpoint::dialer(Multiaddr::empty(), ConnectionId::from(1usize)), - sender: ConnectionHandle::new(ConnectionId::from(1usize), cmd_tx2), - }) - .await - .unwrap(); - - futures::future::poll_fn(|cx| match service.poll_next_unpin(cx) { - std::task::Poll::Ready(_) => panic!("didn't expect event from `TransportService`"), - std::task::Poll::Pending => std::task::Poll::Ready(()), - }) - .await; - - let context = service.connections.get(&peer).unwrap(); - assert_eq!(context.primary.connection_id(), &ConnectionId::from(0usize)); - assert_eq!( - context.secondary.as_ref().unwrap().connection_id(), - &ConnectionId::from(1usize) - ); - - // try to register tertiary connection and verify it's ignored - let (cmd_tx3, mut cmd_rx3) = channel(64); - sender - .send(InnerTransportEvent::ConnectionEstablished { - peer, - connection: ConnectionId::from(2usize), - endpoint: Endpoint::listener(Multiaddr::empty(), ConnectionId::from(2usize)), - sender: ConnectionHandle::new(ConnectionId::from(2usize), cmd_tx3), - }) - .await - .unwrap(); - - futures::future::poll_fn(|cx| match service.poll_next_unpin(cx) { - std::task::Poll::Ready(_) => panic!("didn't expect event from `TransportService`"), - std::task::Poll::Pending => std::task::Poll::Ready(()), - }) - .await; - - let context = service.connections.get(&peer).unwrap(); - assert_eq!(context.primary.connection_id(), &ConnectionId::from(0usize)); - assert_eq!( - context.secondary.as_ref().unwrap().connection_id(), - &ConnectionId::from(1usize) - ); - assert!(cmd_rx3.try_recv().is_err()); - } - - #[tokio::test] - async fn secondary_closing_does_not_emit_event() { - let _ = tracing_subscriber::fmt() - .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) - .try_init(); - - let (mut service, sender, _) = transport_service(); - let peer = PeerId::random(); - - // register first connection - let (cmd_tx1, _cmd_rx1) = channel(64); - sender - .send(InnerTransportEvent::ConnectionEstablished { - peer, - connection: ConnectionId::from(0usize), - endpoint: Endpoint::dialer(Multiaddr::empty(), ConnectionId::from(0usize)), - sender: ConnectionHandle::new(ConnectionId::from(0usize), cmd_tx1), - }) - .await - .unwrap(); - - if let Some(TransportEvent::ConnectionEstablished { - peer: connected_peer, - endpoint, - }) = service.next().await - { - assert_eq!(connected_peer, peer); - assert_eq!(endpoint.address(), &Multiaddr::empty()); - } else { - panic!("expected event from `TransportService`"); - }; - - // register secondary connection - let (cmd_tx2, _cmd_rx2) = channel(64); - sender - .send(InnerTransportEvent::ConnectionEstablished { - peer, - connection: ConnectionId::from(1usize), - endpoint: Endpoint::dialer(Multiaddr::empty(), ConnectionId::from(1usize)), - sender: ConnectionHandle::new(ConnectionId::from(1usize), cmd_tx2), - }) - .await - .unwrap(); - - futures::future::poll_fn(|cx| match service.poll_next_unpin(cx) { - std::task::Poll::Ready(_) => panic!("didn't expect event from `TransportService`"), - std::task::Poll::Pending => std::task::Poll::Ready(()), - }) - .await; - - let context = service.connections.get(&peer).unwrap(); - assert_eq!(context.primary.connection_id(), &ConnectionId::from(0usize)); - assert_eq!( - context.secondary.as_ref().unwrap().connection_id(), - &ConnectionId::from(1usize) - ); - - // close the secondary connection - sender - .send(InnerTransportEvent::ConnectionClosed { - peer, - connection: ConnectionId::from(1usize), - }) - .await - .unwrap(); - - // verify that the protocol is not notified - futures::future::poll_fn(|cx| match service.poll_next_unpin(cx) { - std::task::Poll::Ready(_) => panic!("didn't expect event from `TransportService`"), - std::task::Poll::Pending => std::task::Poll::Ready(()), - }) - .await; - - // verify that the secondary connection doesn't exist anymore - let context = service.connections.get(&peer).unwrap(); - assert_eq!(context.primary.connection_id(), &ConnectionId::from(0usize)); - assert!(context.secondary.is_none()); - } - - #[tokio::test] - async fn convert_secondary_to_primary() { - let (mut service, sender, _) = transport_service(); - let peer = PeerId::random(); - - // register first connection - let (cmd_tx1, mut cmd_rx1) = channel(64); - sender - .send(InnerTransportEvent::ConnectionEstablished { - peer, - connection: ConnectionId::from(0usize), - endpoint: Endpoint::dialer(Multiaddr::empty(), ConnectionId::from(0usize)), - sender: ConnectionHandle::new(ConnectionId::from(0usize), cmd_tx1), - }) - .await - .unwrap(); - - if let Some(TransportEvent::ConnectionEstablished { - peer: connected_peer, - endpoint, - }) = service.next().await - { - assert_eq!(connected_peer, peer); - assert_eq!(endpoint.address(), &Multiaddr::empty()); - } else { - panic!("expected event from `TransportService`"); - }; - - // register secondary connection - let (cmd_tx2, mut cmd_rx2) = channel(64); - sender - .send(InnerTransportEvent::ConnectionEstablished { - peer, - connection: ConnectionId::from(1usize), - endpoint: Endpoint::listener(Multiaddr::empty(), ConnectionId::from(1usize)), - sender: ConnectionHandle::new(ConnectionId::from(1usize), cmd_tx2), - }) - .await - .unwrap(); - - futures::future::poll_fn(|cx| match service.poll_next_unpin(cx) { - std::task::Poll::Ready(_) => panic!("didn't expect event from `TransportService`"), - std::task::Poll::Pending => std::task::Poll::Ready(()), - }) - .await; - - let context = service.connections.get(&peer).unwrap(); - assert_eq!(context.primary.connection_id(), &ConnectionId::from(0usize)); - assert_eq!( - context.secondary.as_ref().unwrap().connection_id(), - &ConnectionId::from(1usize) - ); - - // close the primary connection - sender - .send(InnerTransportEvent::ConnectionClosed { - peer, - connection: ConnectionId::from(0usize), - }) - .await - .unwrap(); - - // verify that the protocol is not notified - futures::future::poll_fn(|cx| match service.poll_next_unpin(cx) { - std::task::Poll::Ready(_) => panic!("didn't expect event from `TransportService`"), - std::task::Poll::Pending => std::task::Poll::Ready(()), - }) - .await; - - // verify that the primary connection has been replaced - let context = service.connections.get(&peer).unwrap(); - assert_eq!(context.primary.connection_id(), &ConnectionId::from(1usize)); - assert!(context.secondary.is_none()); - assert!(cmd_rx1.try_recv().is_err()); - - // close the secondary connection as well - sender - .send(InnerTransportEvent::ConnectionClosed { - peer, - connection: ConnectionId::from(1usize), - }) - .await - .unwrap(); - - if let Some(TransportEvent::ConnectionClosed { - peer: disconnected_peer, - }) = service.next().await - { - assert_eq!(disconnected_peer, peer); - } else { - panic!("expected event from `TransportService`"); - }; - - // verify that the primary connection has been replaced - assert!(service.connections.get(&peer).is_none()); - assert!(cmd_rx2.try_recv().is_err()); - } - - #[tokio::test] - async fn keep_alive_timeout_expires_for_a_stale_connection() { - let _ = tracing_subscriber::fmt() - .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) - .try_init(); - - let (mut service, sender, _) = transport_service(); - let peer = PeerId::random(); - - // register first connection - let (cmd_tx1, _cmd_rx1) = channel(64); - sender - .send(InnerTransportEvent::ConnectionEstablished { - peer, - connection: ConnectionId::from(1337usize), - endpoint: Endpoint::dialer(Multiaddr::empty(), ConnectionId::from(1337usize)), - sender: ConnectionHandle::new(ConnectionId::from(1337usize), cmd_tx1), - }) - .await - .unwrap(); - - if let Some(TransportEvent::ConnectionEstablished { - peer: connected_peer, - endpoint, - }) = service.next().await - { - assert_eq!(connected_peer, peer); - assert_eq!(endpoint.address(), &Multiaddr::empty()); - } else { - panic!("expected event from `TransportService`"); - }; - - // verify the first connection state is correct - assert_eq!(service.keep_alive_tracker.last_activity.len(), 1); - match service.connections.get(&peer) { - Some(context) => { - assert_eq!( - context.primary.connection_id(), - &ConnectionId::from(1337usize) - ); - assert!(context.secondary.is_none()); - } - None => panic!("expected {peer} to exist"), - } - - // close the primary connection - sender - .send(InnerTransportEvent::ConnectionClosed { - peer, - connection: ConnectionId::from(1337usize), - }) - .await - .unwrap(); - - // verify that the protocols are notified of the connection closing as well - if let Some(TransportEvent::ConnectionClosed { - peer: connected_peer, - }) = service.next().await - { - assert_eq!(connected_peer, peer); - } else { - panic!("expected event from `TransportService`"); - } - - // Because the connection was closed, the peer is no longer tracked for keep-alive. - // This leads to better tracking overall since we don't have to track stale connections. - assert!(service.keep_alive_tracker.last_activity.is_empty()); - assert!(service.connections.get(&peer).is_none()); - - // Register new primary connection. - let (cmd_tx1, _cmd_rx1) = channel(64); - sender - .send(InnerTransportEvent::ConnectionEstablished { - peer, - connection: ConnectionId::from(1338usize), - endpoint: Endpoint::listener(Multiaddr::empty(), ConnectionId::from(1338usize)), - sender: ConnectionHandle::new(ConnectionId::from(1338usize), cmd_tx1), - }) - .await - .unwrap(); - - if let Some(TransportEvent::ConnectionEstablished { - peer: connected_peer, - endpoint, - }) = service.next().await - { - assert_eq!(connected_peer, peer); - assert_eq!(endpoint.address(), &Multiaddr::empty()); - } else { - panic!("expected event from `TransportService`"); - }; - - assert_eq!(service.keep_alive_tracker.last_activity.len(), 1); - match service.connections.get(&peer) { - Some(context) => { - assert_eq!( - context.primary.connection_id(), - &ConnectionId::from(1338usize) - ); - assert!(context.secondary.is_none()); - } - None => panic!("expected {peer} to exist"), - } - - match tokio::time::timeout(Duration::from_secs(10), service.next()).await { - Ok(event) => panic!("didn't expect an event: {event:?}"), - Err(_) => {} - } - } - - async fn poll_service(service: &mut TransportService) { - futures::future::poll_fn(|cx| match service.poll_next_unpin(cx) { - std::task::Poll::Ready(_) => panic!("didn't expect event from `TransportService`"), - std::task::Poll::Pending => std::task::Poll::Ready(()), - }) - .await; - } - - #[tokio::test] - async fn keep_alive_timeout_downgrades_connections() { - let _ = tracing_subscriber::fmt() - .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) - .try_init(); - - let (mut service, sender, _) = transport_service(); - let peer = PeerId::random(); - - // register first connection - let (cmd_tx1, _cmd_rx1) = channel(64); - sender - .send(InnerTransportEvent::ConnectionEstablished { - peer, - connection: ConnectionId::from(1337usize), - endpoint: Endpoint::dialer(Multiaddr::empty(), ConnectionId::from(1337usize)), - sender: ConnectionHandle::new(ConnectionId::from(1337usize), cmd_tx1), - }) - .await - .unwrap(); - - if let Some(TransportEvent::ConnectionEstablished { - peer: connected_peer, - endpoint, - }) = service.next().await - { - assert_eq!(connected_peer, peer); - assert_eq!(endpoint.address(), &Multiaddr::empty()); - } else { - panic!("expected event from `TransportService`"); - }; - - // verify the first connection state is correct - assert_eq!(service.keep_alive_tracker.last_activity.len(), 1); - match service.connections.get(&peer) { - Some(context) => { - assert_eq!( - context.primary.connection_id(), - &ConnectionId::from(1337usize) - ); - // Check the connection is still active. - assert!(context.primary.is_active()); - assert!(context.secondary.is_none()); - } - None => panic!("expected {peer} to exist"), - } - - poll_service(&mut service).await; - tokio::time::sleep(KEEP_ALIVE_TIMEOUT + std::time::Duration::from_secs(1)).await; - poll_service(&mut service).await; - - // Verify the connection is downgraded. - match service.connections.get(&peer) { - Some(context) => { - assert_eq!( - context.primary.connection_id(), - &ConnectionId::from(1337usize) - ); - // Check the connection is not active. - assert!(!context.primary.is_active()); - assert!(context.secondary.is_none()); - } - None => panic!("expected {peer} to exist"), - } - - assert_eq!(service.keep_alive_tracker.last_activity.len(), 0); - } - - #[tokio::test] - async fn keep_alive_timeout_reset_when_user_opens_substream() { - let _ = tracing_subscriber::fmt() - .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) - .try_init(); - - let (mut service, sender, _) = transport_service(); - let peer = PeerId::random(); - - // register first connection - let (cmd_tx1, _cmd_rx1) = channel(64); - sender - .send(InnerTransportEvent::ConnectionEstablished { - peer, - connection: ConnectionId::from(1337usize), - endpoint: Endpoint::dialer(Multiaddr::empty(), ConnectionId::from(1337usize)), - sender: ConnectionHandle::new(ConnectionId::from(1337usize), cmd_tx1), - }) - .await - .unwrap(); - - if let Some(TransportEvent::ConnectionEstablished { - peer: connected_peer, - endpoint, - }) = service.next().await - { - assert_eq!(connected_peer, peer); - assert_eq!(endpoint.address(), &Multiaddr::empty()); - } else { - panic!("expected event from `TransportService`"); - }; - - // verify the first connection state is correct - assert_eq!(service.keep_alive_tracker.last_activity.len(), 1); - match service.connections.get(&peer) { - Some(context) => { - assert_eq!( - context.primary.connection_id(), - &ConnectionId::from(1337usize) - ); - // Check the connection is still active. - assert!(context.primary.is_active()); - assert!(context.secondary.is_none()); - } - None => panic!("expected {peer} to exist"), - } - - poll_service(&mut service).await; - // Sleep for almost the entire keep-alive timeout. - tokio::time::sleep(std::time::Duration::from_secs(3)).await; - - // This ensures we reset the keep-alive timer when other protocols - // want to open a substream. - // We are still tracking the same peer. - service.open_substream(peer).unwrap(); - assert_eq!(service.keep_alive_tracker.last_activity.len(), 1); - - poll_service(&mut service).await; - // The keep alive timeout should be advanced. - tokio::time::sleep(std::time::Duration::from_secs(3)).await; - poll_service(&mut service).await; - assert_eq!(service.keep_alive_tracker.last_activity.len(), 1); - // If the `service.open_substream` wasn't called, the connection would have been downgraded. - // Instead the keep-alive was forwarded `KEEP_ALIVE_TIMEOUT` seconds into the future. - // Verify the connection is still active. - match service.connections.get(&peer) { - Some(context) => { - assert_eq!( - context.primary.connection_id(), - &ConnectionId::from(1337usize) - ); - assert!(context.primary.is_active()); - assert!(context.secondary.is_none()); - } - None => panic!("expected {peer} to exist"), - } - - poll_service(&mut service).await; - tokio::time::sleep(KEEP_ALIVE_TIMEOUT).await; - poll_service(&mut service).await; - - assert_eq!(service.keep_alive_tracker.last_activity.len(), 0); - - // The connection had no substream activity for `KEEP_ALIVE_TIMEOUT` seconds. - // Verify the connection is downgraded. - match service.connections.get(&peer) { - Some(context) => { - assert_eq!( - context.primary.connection_id(), - &ConnectionId::from(1337usize) - ); - assert!(!context.primary.is_active()); - assert!(context.secondary.is_none()); - } - None => panic!("expected {peer} to exist"), - } - } - - #[tokio::test] - async fn downgraded_connection_without_substreams_is_closed() { - let _ = tracing_subscriber::fmt() - .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) - .try_init(); - - let (mut service, sender, _) = transport_service(); - let peer = PeerId::random(); - - // register first connection - let (cmd_tx1, mut cmd_rx1) = channel(64); - sender - .send(InnerTransportEvent::ConnectionEstablished { - peer, - connection: ConnectionId::from(1337usize), - endpoint: Endpoint::dialer(Multiaddr::empty(), ConnectionId::from(1337usize)), - sender: ConnectionHandle::new(ConnectionId::from(1337usize), cmd_tx1), - }) - .await - .unwrap(); - - if let Some(TransportEvent::ConnectionEstablished { - peer: connected_peer, - endpoint, - }) = service.next().await - { - assert_eq!(connected_peer, peer); - assert_eq!(endpoint.address(), &Multiaddr::empty()); - } else { - panic!("expected event from `TransportService`"); - }; - - // verify the first connection state is correct - assert_eq!(service.keep_alive_tracker.last_activity.len(), 1); - match service.connections.get(&peer) { - Some(context) => { - assert_eq!( - context.primary.connection_id(), - &ConnectionId::from(1337usize) - ); - // Check the connection is still active. - assert!(context.primary.is_active()); - assert!(context.secondary.is_none()); - } - None => panic!("expected {peer} to exist"), - } - - // Open substreams to the peer. - let substream_id = service.open_substream(peer).unwrap(); - let second_substream_id = service.open_substream(peer).unwrap(); - - // Simulate keep-alive timeout expiration. - poll_service(&mut service).await; - tokio::time::sleep(KEEP_ALIVE_TIMEOUT + std::time::Duration::from_secs(1)).await; - poll_service(&mut service).await; - - let mut permits = Vec::new(); - - // First substream. - let protocol_command = cmd_rx1.recv().await.unwrap(); - match protocol_command { - ProtocolCommand::OpenSubstream { - protocol, - substream_id: opened_substream_id, - permit, - .. - } => { - assert_eq!(protocol, ProtocolName::from("/notif/1")); - assert_eq!(substream_id, opened_substream_id); - - // Save the substream permit for later. - permits.push(permit); - } - _ => panic!("expected `ProtocolCommand::OpenSubstream`"), - } - - // Second substream. - let protocol_command = cmd_rx1.recv().await.unwrap(); - match protocol_command { - ProtocolCommand::OpenSubstream { - protocol, - substream_id: opened_substream_id, - permit, - .. - } => { - assert_eq!(protocol, ProtocolName::from("/notif/1")); - assert_eq!(second_substream_id, opened_substream_id); - - // Save the substream permit for later. - permits.push(permit); - } - _ => panic!("expected `ProtocolCommand::OpenSubstream`"), - } - - // Drop one permit. - let permit = permits.pop(); - // Individual transports like TCP will open a substream - // and then will generate a `SubstreamOpened` event via - // the protocol-set handler. - // - // The substream is used by individual protocols and then - // is closed. This simulates the substream being closed. - drop(permit); - - // Open a new substream to the peer. This will succeed as long as we still have - // one substream open. - let substream_id = service.open_substream(peer).unwrap(); - // Handle the substream. - let protocol_command = cmd_rx1.recv().await.unwrap(); - match protocol_command { - ProtocolCommand::OpenSubstream { - protocol, - substream_id: opened_substream_id, - permit, - .. - } => { - assert_eq!(protocol, ProtocolName::from("/notif/1")); - assert_eq!(substream_id, opened_substream_id); - - // Save the substream permit for later. - permits.push(permit); - } - _ => panic!("expected `ProtocolCommand::OpenSubstream`"), - } - - // Drop all substreams. - drop(permits); - - poll_service(&mut service).await; - tokio::time::sleep(KEEP_ALIVE_TIMEOUT + std::time::Duration::from_secs(1)).await; - poll_service(&mut service).await; - - // Cannot open a new substream because: - // 1. connection was downgraded by keep-alive timeout - // 2. all substreams were dropped. - assert_eq!( - service.open_substream(peer), - Err(SubstreamError::ConnectionClosed) - ); - } - - #[tokio::test] - async fn substream_opening_upgrades_connection_and_resets_keep_alive() { - let _ = tracing_subscriber::fmt() - .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) - .try_init(); - - let (mut service, sender, _) = transport_service(); - let peer = PeerId::random(); - - // register first connection - let (cmd_tx1, mut cmd_rx1) = channel(64); - sender - .send(InnerTransportEvent::ConnectionEstablished { - peer, - connection: ConnectionId::from(1337usize), - endpoint: Endpoint::dialer(Multiaddr::empty(), ConnectionId::from(1337usize)), - sender: ConnectionHandle::new(ConnectionId::from(1337usize), cmd_tx1), - }) - .await - .unwrap(); - - if let Some(TransportEvent::ConnectionEstablished { - peer: connected_peer, - endpoint, - }) = service.next().await - { - assert_eq!(connected_peer, peer); - assert_eq!(endpoint.address(), &Multiaddr::empty()); - } else { - panic!("expected event from `TransportService`"); - }; - - // verify the first connection state is correct - assert_eq!(service.keep_alive_tracker.last_activity.len(), 1); - match service.connections.get(&peer) { - Some(context) => { - assert_eq!( - context.primary.connection_id(), - &ConnectionId::from(1337usize) - ); - // Check the connection is still active. - assert!(context.primary.is_active()); - assert!(context.secondary.is_none()); - } - None => panic!("expected {peer} to exist"), - } - - // Open substreams to the peer. - let substream_id = service.open_substream(peer).unwrap(); - let second_substream_id = service.open_substream(peer).unwrap(); - - let mut permits = Vec::new(); - // First substream. - let protocol_command = cmd_rx1.recv().await.unwrap(); - match protocol_command { - ProtocolCommand::OpenSubstream { - protocol, - substream_id: opened_substream_id, - permit, - .. - } => { - assert_eq!(protocol, ProtocolName::from("/notif/1")); - assert_eq!(substream_id, opened_substream_id); - - // Save the substream permit for later. - permits.push(permit); - } - _ => panic!("expected `ProtocolCommand::OpenSubstream`"), - } - - // Second substream. - let protocol_command = cmd_rx1.recv().await.unwrap(); - match protocol_command { - ProtocolCommand::OpenSubstream { - protocol, - substream_id: opened_substream_id, - permit, - .. - } => { - assert_eq!(protocol, ProtocolName::from("/notif/1")); - assert_eq!(second_substream_id, opened_substream_id); - - // Save the substream permit for later. - permits.push(permit); - } - _ => panic!("expected `ProtocolCommand::OpenSubstream`"), - } - - // Sleep to trigger keep-alive timeout. - poll_service(&mut service).await; - tokio::time::sleep(KEEP_ALIVE_TIMEOUT + std::time::Duration::from_secs(1)).await; - poll_service(&mut service).await; - - // Verify the connection is downgraded. - match service.connections.get(&peer) { - Some(context) => { - assert_eq!( - context.primary.connection_id(), - &ConnectionId::from(1337usize) - ); - // Check the connection is not active. - assert!(!context.primary.is_active()); - assert!(context.secondary.is_none()); - } - None => panic!("expected {peer} to exist"), - } - assert_eq!(service.keep_alive_tracker.last_activity.len(), 0); - - // Open a new substream to the peer. This will succeed as long as we still have - // at least substream permit. - let substream_id = service.open_substream(peer).unwrap(); - let protocol_command = cmd_rx1.recv().await.unwrap(); - match protocol_command { - ProtocolCommand::OpenSubstream { - protocol, - substream_id: opened_substream_id, - permit, - .. - } => { - assert_eq!(protocol, ProtocolName::from("/notif/1")); - assert_eq!(substream_id, opened_substream_id); - - // Save the substream permit for later. - permits.push(permit); - } - _ => panic!("expected `ProtocolCommand::OpenSubstream`"), - } - - poll_service(&mut service).await; - - // Verify the connection is upgraded and keep-alive is tracked. - match service.connections.get(&peer) { - Some(context) => { - assert_eq!( - context.primary.connection_id(), - &ConnectionId::from(1337usize) - ); - // Check the connection is active, because it was upgraded by the last substream. - assert!(context.primary.is_active()); - assert!(context.secondary.is_none()); - } - None => panic!("expected {peer} to exist"), - } - assert_eq!(service.keep_alive_tracker.last_activity.len(), 1); - - // Drop all substreams - drop(permits); - - // The connection is still active, because it was upgraded by the last substream open. - match service.connections.get(&peer) { - Some(context) => { - assert_eq!( - context.primary.connection_id(), - &ConnectionId::from(1337usize) - ); - // Check the connection is active, because it was upgraded by the last substream. - assert!(context.primary.is_active()); - assert!(context.secondary.is_none()); - } - None => panic!("expected {peer} to exist"), - } - assert_eq!(service.keep_alive_tracker.last_activity.len(), 1); - - // Sleep to trigger keep-alive timeout. - poll_service(&mut service).await; - tokio::time::sleep(KEEP_ALIVE_TIMEOUT + std::time::Duration::from_secs(1)).await; - poll_service(&mut service).await; - - match service.connections.get(&peer) { - Some(context) => { - assert_eq!( - context.primary.connection_id(), - &ConnectionId::from(1337usize) - ); - // No longer active because it was downgraded by keep-alive and no - // substream opens were made. - assert!(!context.primary.is_active()); - assert!(context.secondary.is_none()); - } - None => panic!("expected {peer} to exist"), - } - - // Cannot open a new substream because: - // 1. connection was downgraded by keep-alive timeout - // 2. all substreams were dropped. - assert_eq!( - service.open_substream(peer), - Err(SubstreamError::ConnectionClosed) - ); - } - - #[tokio::test] - async fn keep_alive_pop_elements() { - let mut tracker = KeepAliveTracker::new(Duration::from_secs(1)); - - let (peer1, connection1) = (PeerId::random(), ConnectionId::from(1usize)); - let (peer2, connection2) = (PeerId::random(), ConnectionId::from(2usize)); - let added_keys = HashSet::from([(peer1, connection1), (peer2, connection2)]); - - tracker.on_connection_established(peer1, connection1); - tracker.on_connection_established(peer2, connection2); - - tokio::time::sleep(Duration::from_secs(2)).await; - - let key = tracker.next().await.unwrap(); - assert!(added_keys.contains(&key)); - - let key = tracker.next().await.unwrap(); - assert!(added_keys.contains(&key)); - - // No more elements. - assert!(tracker.pending_keep_alive_timeouts.is_empty()); - assert!(tracker.last_activity.is_empty()); - } + use super::*; + use crate::{ + protocol::{ProtocolCommand, SubstreamKeepAlive, TransportService}, + transport::{ + manager::{handle::InnerTransportManagerCommand, TransportManagerHandle}, + KEEP_ALIVE_TIMEOUT, + }, + }; + use futures::StreamExt; + use parking_lot::RwLock; + use std::collections::HashSet; + + /// Create new `TransportService` + fn transport_service( + ) -> (TransportService, Sender, Receiver) { + let (cmd_tx, cmd_rx) = channel(64); + let peer = PeerId::random(); + + let handle = TransportManagerHandle::new( + peer, + Arc::new(RwLock::new(HashMap::new())), + cmd_tx, + HashSet::new(), + Default::default(), + PublicAddresses::new(peer), + ); + + let (service, sender) = TransportService::new( + peer, + ProtocolName::from("/notif/1"), + Vec::new(), + Arc::new(AtomicUsize::new(0usize)), + handle, + KEEP_ALIVE_TIMEOUT, + SubstreamKeepAlive::Yes, + ); + + (service, sender, cmd_rx) + } + + #[tokio::test] + async fn secondary_connection_stored() { + let (mut service, sender, _) = transport_service(); + let peer = PeerId::random(); + + // register first connection + let (cmd_tx1, _cmd_rx1) = channel(64); + sender + .send(InnerTransportEvent::ConnectionEstablished { + peer, + connection: ConnectionId::from(0usize), + endpoint: Endpoint::listener(Multiaddr::empty(), ConnectionId::from(0usize)), + sender: ConnectionHandle::new(ConnectionId::from(0usize), cmd_tx1), + }) + .await + .unwrap(); + + if let Some(TransportEvent::ConnectionEstablished { peer: connected_peer, endpoint }) = + service.next().await + { + assert_eq!(connected_peer, peer); + assert_eq!(endpoint.address(), &Multiaddr::empty()); + } else { + panic!("expected event from `TransportService`"); + }; + + // register secondary connection + let (cmd_tx2, _cmd_rx2) = channel(64); + sender + .send(InnerTransportEvent::ConnectionEstablished { + peer, + connection: ConnectionId::from(1usize), + endpoint: Endpoint::listener(Multiaddr::empty(), ConnectionId::from(1usize)), + sender: ConnectionHandle::new(ConnectionId::from(1usize), cmd_tx2), + }) + .await + .unwrap(); + + futures::future::poll_fn(|cx| match service.poll_next_unpin(cx) { + std::task::Poll::Ready(_) => panic!("didn't expect event from `TransportService`"), + std::task::Poll::Pending => std::task::Poll::Ready(()), + }) + .await; + + let context = service.connections.get(&peer).unwrap(); + assert_eq!(context.primary.connection_id(), &ConnectionId::from(0usize)); + assert_eq!( + context.secondary.as_ref().unwrap().connection_id(), + &ConnectionId::from(1usize) + ); + } + + #[tokio::test] + async fn tertiary_connection_ignored() { + let (mut service, sender, _) = transport_service(); + let peer = PeerId::random(); + + // register first connection + let (cmd_tx1, _cmd_rx1) = channel(64); + sender + .send(InnerTransportEvent::ConnectionEstablished { + peer, + connection: ConnectionId::from(0usize), + endpoint: Endpoint::dialer(Multiaddr::empty(), ConnectionId::from(0usize)), + sender: ConnectionHandle::new(ConnectionId::from(0usize), cmd_tx1), + }) + .await + .unwrap(); + + if let Some(TransportEvent::ConnectionEstablished { peer: connected_peer, endpoint }) = + service.next().await + { + assert_eq!(connected_peer, peer); + assert_eq!(endpoint.address(), &Multiaddr::empty()); + } else { + panic!("expected event from `TransportService`"); + }; + + // register secondary connection + let (cmd_tx2, _cmd_rx2) = channel(64); + sender + .send(InnerTransportEvent::ConnectionEstablished { + peer, + connection: ConnectionId::from(1usize), + endpoint: Endpoint::dialer(Multiaddr::empty(), ConnectionId::from(1usize)), + sender: ConnectionHandle::new(ConnectionId::from(1usize), cmd_tx2), + }) + .await + .unwrap(); + + futures::future::poll_fn(|cx| match service.poll_next_unpin(cx) { + std::task::Poll::Ready(_) => panic!("didn't expect event from `TransportService`"), + std::task::Poll::Pending => std::task::Poll::Ready(()), + }) + .await; + + let context = service.connections.get(&peer).unwrap(); + assert_eq!(context.primary.connection_id(), &ConnectionId::from(0usize)); + assert_eq!( + context.secondary.as_ref().unwrap().connection_id(), + &ConnectionId::from(1usize) + ); + + // try to register tertiary connection and verify it's ignored + let (cmd_tx3, mut cmd_rx3) = channel(64); + sender + .send(InnerTransportEvent::ConnectionEstablished { + peer, + connection: ConnectionId::from(2usize), + endpoint: Endpoint::listener(Multiaddr::empty(), ConnectionId::from(2usize)), + sender: ConnectionHandle::new(ConnectionId::from(2usize), cmd_tx3), + }) + .await + .unwrap(); + + futures::future::poll_fn(|cx| match service.poll_next_unpin(cx) { + std::task::Poll::Ready(_) => panic!("didn't expect event from `TransportService`"), + std::task::Poll::Pending => std::task::Poll::Ready(()), + }) + .await; + + let context = service.connections.get(&peer).unwrap(); + assert_eq!(context.primary.connection_id(), &ConnectionId::from(0usize)); + assert_eq!( + context.secondary.as_ref().unwrap().connection_id(), + &ConnectionId::from(1usize) + ); + assert!(cmd_rx3.try_recv().is_err()); + } + + #[tokio::test] + async fn secondary_closing_does_not_emit_event() { + let _ = tracing_subscriber::fmt() + .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) + .try_init(); + + let (mut service, sender, _) = transport_service(); + let peer = PeerId::random(); + + // register first connection + let (cmd_tx1, _cmd_rx1) = channel(64); + sender + .send(InnerTransportEvent::ConnectionEstablished { + peer, + connection: ConnectionId::from(0usize), + endpoint: Endpoint::dialer(Multiaddr::empty(), ConnectionId::from(0usize)), + sender: ConnectionHandle::new(ConnectionId::from(0usize), cmd_tx1), + }) + .await + .unwrap(); + + if let Some(TransportEvent::ConnectionEstablished { peer: connected_peer, endpoint }) = + service.next().await + { + assert_eq!(connected_peer, peer); + assert_eq!(endpoint.address(), &Multiaddr::empty()); + } else { + panic!("expected event from `TransportService`"); + }; + + // register secondary connection + let (cmd_tx2, _cmd_rx2) = channel(64); + sender + .send(InnerTransportEvent::ConnectionEstablished { + peer, + connection: ConnectionId::from(1usize), + endpoint: Endpoint::dialer(Multiaddr::empty(), ConnectionId::from(1usize)), + sender: ConnectionHandle::new(ConnectionId::from(1usize), cmd_tx2), + }) + .await + .unwrap(); + + futures::future::poll_fn(|cx| match service.poll_next_unpin(cx) { + std::task::Poll::Ready(_) => panic!("didn't expect event from `TransportService`"), + std::task::Poll::Pending => std::task::Poll::Ready(()), + }) + .await; + + let context = service.connections.get(&peer).unwrap(); + assert_eq!(context.primary.connection_id(), &ConnectionId::from(0usize)); + assert_eq!( + context.secondary.as_ref().unwrap().connection_id(), + &ConnectionId::from(1usize) + ); + + // close the secondary connection + sender + .send(InnerTransportEvent::ConnectionClosed { + peer, + connection: ConnectionId::from(1usize), + }) + .await + .unwrap(); + + // verify that the protocol is not notified + futures::future::poll_fn(|cx| match service.poll_next_unpin(cx) { + std::task::Poll::Ready(_) => panic!("didn't expect event from `TransportService`"), + std::task::Poll::Pending => std::task::Poll::Ready(()), + }) + .await; + + // verify that the secondary connection doesn't exist anymore + let context = service.connections.get(&peer).unwrap(); + assert_eq!(context.primary.connection_id(), &ConnectionId::from(0usize)); + assert!(context.secondary.is_none()); + } + + #[tokio::test] + async fn convert_secondary_to_primary() { + let (mut service, sender, _) = transport_service(); + let peer = PeerId::random(); + + // register first connection + let (cmd_tx1, mut cmd_rx1) = channel(64); + sender + .send(InnerTransportEvent::ConnectionEstablished { + peer, + connection: ConnectionId::from(0usize), + endpoint: Endpoint::dialer(Multiaddr::empty(), ConnectionId::from(0usize)), + sender: ConnectionHandle::new(ConnectionId::from(0usize), cmd_tx1), + }) + .await + .unwrap(); + + if let Some(TransportEvent::ConnectionEstablished { peer: connected_peer, endpoint }) = + service.next().await + { + assert_eq!(connected_peer, peer); + assert_eq!(endpoint.address(), &Multiaddr::empty()); + } else { + panic!("expected event from `TransportService`"); + }; + + // register secondary connection + let (cmd_tx2, mut cmd_rx2) = channel(64); + sender + .send(InnerTransportEvent::ConnectionEstablished { + peer, + connection: ConnectionId::from(1usize), + endpoint: Endpoint::listener(Multiaddr::empty(), ConnectionId::from(1usize)), + sender: ConnectionHandle::new(ConnectionId::from(1usize), cmd_tx2), + }) + .await + .unwrap(); + + futures::future::poll_fn(|cx| match service.poll_next_unpin(cx) { + std::task::Poll::Ready(_) => panic!("didn't expect event from `TransportService`"), + std::task::Poll::Pending => std::task::Poll::Ready(()), + }) + .await; + + let context = service.connections.get(&peer).unwrap(); + assert_eq!(context.primary.connection_id(), &ConnectionId::from(0usize)); + assert_eq!( + context.secondary.as_ref().unwrap().connection_id(), + &ConnectionId::from(1usize) + ); + + // close the primary connection + sender + .send(InnerTransportEvent::ConnectionClosed { + peer, + connection: ConnectionId::from(0usize), + }) + .await + .unwrap(); + + // verify that the protocol is not notified + futures::future::poll_fn(|cx| match service.poll_next_unpin(cx) { + std::task::Poll::Ready(_) => panic!("didn't expect event from `TransportService`"), + std::task::Poll::Pending => std::task::Poll::Ready(()), + }) + .await; + + // verify that the primary connection has been replaced + let context = service.connections.get(&peer).unwrap(); + assert_eq!(context.primary.connection_id(), &ConnectionId::from(1usize)); + assert!(context.secondary.is_none()); + assert!(cmd_rx1.try_recv().is_err()); + + // close the secondary connection as well + sender + .send(InnerTransportEvent::ConnectionClosed { + peer, + connection: ConnectionId::from(1usize), + }) + .await + .unwrap(); + + if let Some(TransportEvent::ConnectionClosed { peer: disconnected_peer }) = + service.next().await + { + assert_eq!(disconnected_peer, peer); + } else { + panic!("expected event from `TransportService`"); + }; + + // verify that the primary connection has been replaced + assert!(service.connections.get(&peer).is_none()); + assert!(cmd_rx2.try_recv().is_err()); + } + + #[tokio::test] + async fn keep_alive_timeout_expires_for_a_stale_connection() { + let _ = tracing_subscriber::fmt() + .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) + .try_init(); + + let (mut service, sender, _) = transport_service(); + let peer = PeerId::random(); + + // register first connection + let (cmd_tx1, _cmd_rx1) = channel(64); + sender + .send(InnerTransportEvent::ConnectionEstablished { + peer, + connection: ConnectionId::from(1337usize), + endpoint: Endpoint::dialer(Multiaddr::empty(), ConnectionId::from(1337usize)), + sender: ConnectionHandle::new(ConnectionId::from(1337usize), cmd_tx1), + }) + .await + .unwrap(); + + if let Some(TransportEvent::ConnectionEstablished { peer: connected_peer, endpoint }) = + service.next().await + { + assert_eq!(connected_peer, peer); + assert_eq!(endpoint.address(), &Multiaddr::empty()); + } else { + panic!("expected event from `TransportService`"); + }; + + // verify the first connection state is correct + assert_eq!(service.keep_alive_tracker.last_activity.len(), 1); + match service.connections.get(&peer) { + Some(context) => { + assert_eq!(context.primary.connection_id(), &ConnectionId::from(1337usize)); + assert!(context.secondary.is_none()); + }, + None => panic!("expected {peer} to exist"), + } + + // close the primary connection + sender + .send(InnerTransportEvent::ConnectionClosed { + peer, + connection: ConnectionId::from(1337usize), + }) + .await + .unwrap(); + + // verify that the protocols are notified of the connection closing as well + if let Some(TransportEvent::ConnectionClosed { peer: connected_peer }) = + service.next().await + { + assert_eq!(connected_peer, peer); + } else { + panic!("expected event from `TransportService`"); + } + + // Because the connection was closed, the peer is no longer tracked for keep-alive. + // This leads to better tracking overall since we don't have to track stale connections. + assert!(service.keep_alive_tracker.last_activity.is_empty()); + assert!(service.connections.get(&peer).is_none()); + + // Register new primary connection. + let (cmd_tx1, _cmd_rx1) = channel(64); + sender + .send(InnerTransportEvent::ConnectionEstablished { + peer, + connection: ConnectionId::from(1338usize), + endpoint: Endpoint::listener(Multiaddr::empty(), ConnectionId::from(1338usize)), + sender: ConnectionHandle::new(ConnectionId::from(1338usize), cmd_tx1), + }) + .await + .unwrap(); + + if let Some(TransportEvent::ConnectionEstablished { peer: connected_peer, endpoint }) = + service.next().await + { + assert_eq!(connected_peer, peer); + assert_eq!(endpoint.address(), &Multiaddr::empty()); + } else { + panic!("expected event from `TransportService`"); + }; + + assert_eq!(service.keep_alive_tracker.last_activity.len(), 1); + match service.connections.get(&peer) { + Some(context) => { + assert_eq!(context.primary.connection_id(), &ConnectionId::from(1338usize)); + assert!(context.secondary.is_none()); + }, + None => panic!("expected {peer} to exist"), + } + + match tokio::time::timeout(Duration::from_secs(10), service.next()).await { + Ok(event) => panic!("didn't expect an event: {event:?}"), + Err(_) => {}, + } + } + + async fn poll_service(service: &mut TransportService) { + futures::future::poll_fn(|cx| match service.poll_next_unpin(cx) { + std::task::Poll::Ready(_) => panic!("didn't expect event from `TransportService`"), + std::task::Poll::Pending => std::task::Poll::Ready(()), + }) + .await; + } + + #[tokio::test] + async fn keep_alive_timeout_downgrades_connections() { + let _ = tracing_subscriber::fmt() + .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) + .try_init(); + + let (mut service, sender, _) = transport_service(); + let peer = PeerId::random(); + + // register first connection + let (cmd_tx1, _cmd_rx1) = channel(64); + sender + .send(InnerTransportEvent::ConnectionEstablished { + peer, + connection: ConnectionId::from(1337usize), + endpoint: Endpoint::dialer(Multiaddr::empty(), ConnectionId::from(1337usize)), + sender: ConnectionHandle::new(ConnectionId::from(1337usize), cmd_tx1), + }) + .await + .unwrap(); + + if let Some(TransportEvent::ConnectionEstablished { peer: connected_peer, endpoint }) = + service.next().await + { + assert_eq!(connected_peer, peer); + assert_eq!(endpoint.address(), &Multiaddr::empty()); + } else { + panic!("expected event from `TransportService`"); + }; + + // verify the first connection state is correct + assert_eq!(service.keep_alive_tracker.last_activity.len(), 1); + match service.connections.get(&peer) { + Some(context) => { + assert_eq!(context.primary.connection_id(), &ConnectionId::from(1337usize)); + // Check the connection is still active. + assert!(context.primary.is_active()); + assert!(context.secondary.is_none()); + }, + None => panic!("expected {peer} to exist"), + } + + poll_service(&mut service).await; + tokio::time::sleep(KEEP_ALIVE_TIMEOUT + std::time::Duration::from_secs(1)).await; + poll_service(&mut service).await; + + // Verify the connection is downgraded. + match service.connections.get(&peer) { + Some(context) => { + assert_eq!(context.primary.connection_id(), &ConnectionId::from(1337usize)); + // Check the connection is not active. + assert!(!context.primary.is_active()); + assert!(context.secondary.is_none()); + }, + None => panic!("expected {peer} to exist"), + } + + assert_eq!(service.keep_alive_tracker.last_activity.len(), 0); + } + + #[tokio::test] + async fn keep_alive_timeout_reset_when_user_opens_substream() { + let _ = tracing_subscriber::fmt() + .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) + .try_init(); + + let (mut service, sender, _) = transport_service(); + let peer = PeerId::random(); + + // register first connection + let (cmd_tx1, _cmd_rx1) = channel(64); + sender + .send(InnerTransportEvent::ConnectionEstablished { + peer, + connection: ConnectionId::from(1337usize), + endpoint: Endpoint::dialer(Multiaddr::empty(), ConnectionId::from(1337usize)), + sender: ConnectionHandle::new(ConnectionId::from(1337usize), cmd_tx1), + }) + .await + .unwrap(); + + if let Some(TransportEvent::ConnectionEstablished { peer: connected_peer, endpoint }) = + service.next().await + { + assert_eq!(connected_peer, peer); + assert_eq!(endpoint.address(), &Multiaddr::empty()); + } else { + panic!("expected event from `TransportService`"); + }; + + // verify the first connection state is correct + assert_eq!(service.keep_alive_tracker.last_activity.len(), 1); + match service.connections.get(&peer) { + Some(context) => { + assert_eq!(context.primary.connection_id(), &ConnectionId::from(1337usize)); + // Check the connection is still active. + assert!(context.primary.is_active()); + assert!(context.secondary.is_none()); + }, + None => panic!("expected {peer} to exist"), + } + + poll_service(&mut service).await; + // Sleep for almost the entire keep-alive timeout. + tokio::time::sleep(std::time::Duration::from_secs(3)).await; + + // This ensures we reset the keep-alive timer when other protocols + // want to open a substream. + // We are still tracking the same peer. + service.open_substream(peer).unwrap(); + assert_eq!(service.keep_alive_tracker.last_activity.len(), 1); + + poll_service(&mut service).await; + // The keep alive timeout should be advanced. + tokio::time::sleep(std::time::Duration::from_secs(3)).await; + poll_service(&mut service).await; + assert_eq!(service.keep_alive_tracker.last_activity.len(), 1); + // If the `service.open_substream` wasn't called, the connection would have been downgraded. + // Instead the keep-alive was forwarded `KEEP_ALIVE_TIMEOUT` seconds into the future. + // Verify the connection is still active. + match service.connections.get(&peer) { + Some(context) => { + assert_eq!(context.primary.connection_id(), &ConnectionId::from(1337usize)); + assert!(context.primary.is_active()); + assert!(context.secondary.is_none()); + }, + None => panic!("expected {peer} to exist"), + } + + poll_service(&mut service).await; + tokio::time::sleep(KEEP_ALIVE_TIMEOUT).await; + poll_service(&mut service).await; + + assert_eq!(service.keep_alive_tracker.last_activity.len(), 0); + + // The connection had no substream activity for `KEEP_ALIVE_TIMEOUT` seconds. + // Verify the connection is downgraded. + match service.connections.get(&peer) { + Some(context) => { + assert_eq!(context.primary.connection_id(), &ConnectionId::from(1337usize)); + assert!(!context.primary.is_active()); + assert!(context.secondary.is_none()); + }, + None => panic!("expected {peer} to exist"), + } + } + + #[tokio::test] + async fn downgraded_connection_without_substreams_is_closed() { + let _ = tracing_subscriber::fmt() + .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) + .try_init(); + + let (mut service, sender, _) = transport_service(); + let peer = PeerId::random(); + + // register first connection + let (cmd_tx1, mut cmd_rx1) = channel(64); + sender + .send(InnerTransportEvent::ConnectionEstablished { + peer, + connection: ConnectionId::from(1337usize), + endpoint: Endpoint::dialer(Multiaddr::empty(), ConnectionId::from(1337usize)), + sender: ConnectionHandle::new(ConnectionId::from(1337usize), cmd_tx1), + }) + .await + .unwrap(); + + if let Some(TransportEvent::ConnectionEstablished { peer: connected_peer, endpoint }) = + service.next().await + { + assert_eq!(connected_peer, peer); + assert_eq!(endpoint.address(), &Multiaddr::empty()); + } else { + panic!("expected event from `TransportService`"); + }; + + // verify the first connection state is correct + assert_eq!(service.keep_alive_tracker.last_activity.len(), 1); + match service.connections.get(&peer) { + Some(context) => { + assert_eq!(context.primary.connection_id(), &ConnectionId::from(1337usize)); + // Check the connection is still active. + assert!(context.primary.is_active()); + assert!(context.secondary.is_none()); + }, + None => panic!("expected {peer} to exist"), + } + + // Open substreams to the peer. + let substream_id = service.open_substream(peer).unwrap(); + let second_substream_id = service.open_substream(peer).unwrap(); + + // Simulate keep-alive timeout expiration. + poll_service(&mut service).await; + tokio::time::sleep(KEEP_ALIVE_TIMEOUT + std::time::Duration::from_secs(1)).await; + poll_service(&mut service).await; + + let mut permits = Vec::new(); + + // First substream. + let protocol_command = cmd_rx1.recv().await.unwrap(); + match protocol_command { + ProtocolCommand::OpenSubstream { + protocol, + substream_id: opened_substream_id, + permit, + .. + } => { + assert_eq!(protocol, ProtocolName::from("/notif/1")); + assert_eq!(substream_id, opened_substream_id); + + // Save the substream permit for later. + permits.push(permit); + }, + _ => panic!("expected `ProtocolCommand::OpenSubstream`"), + } + + // Second substream. + let protocol_command = cmd_rx1.recv().await.unwrap(); + match protocol_command { + ProtocolCommand::OpenSubstream { + protocol, + substream_id: opened_substream_id, + permit, + .. + } => { + assert_eq!(protocol, ProtocolName::from("/notif/1")); + assert_eq!(second_substream_id, opened_substream_id); + + // Save the substream permit for later. + permits.push(permit); + }, + _ => panic!("expected `ProtocolCommand::OpenSubstream`"), + } + + // Drop one permit. + let permit = permits.pop(); + // Individual transports like TCP will open a substream + // and then will generate a `SubstreamOpened` event via + // the protocol-set handler. + // + // The substream is used by individual protocols and then + // is closed. This simulates the substream being closed. + drop(permit); + + // Open a new substream to the peer. This will succeed as long as we still have + // one substream open. + let substream_id = service.open_substream(peer).unwrap(); + // Handle the substream. + let protocol_command = cmd_rx1.recv().await.unwrap(); + match protocol_command { + ProtocolCommand::OpenSubstream { + protocol, + substream_id: opened_substream_id, + permit, + .. + } => { + assert_eq!(protocol, ProtocolName::from("/notif/1")); + assert_eq!(substream_id, opened_substream_id); + + // Save the substream permit for later. + permits.push(permit); + }, + _ => panic!("expected `ProtocolCommand::OpenSubstream`"), + } + + // Drop all substreams. + drop(permits); + + poll_service(&mut service).await; + tokio::time::sleep(KEEP_ALIVE_TIMEOUT + std::time::Duration::from_secs(1)).await; + poll_service(&mut service).await; + + // Cannot open a new substream because: + // 1. connection was downgraded by keep-alive timeout + // 2. all substreams were dropped. + assert_eq!(service.open_substream(peer), Err(SubstreamError::ConnectionClosed)); + } + + #[tokio::test] + async fn substream_opening_upgrades_connection_and_resets_keep_alive() { + let _ = tracing_subscriber::fmt() + .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) + .try_init(); + + let (mut service, sender, _) = transport_service(); + let peer = PeerId::random(); + + // register first connection + let (cmd_tx1, mut cmd_rx1) = channel(64); + sender + .send(InnerTransportEvent::ConnectionEstablished { + peer, + connection: ConnectionId::from(1337usize), + endpoint: Endpoint::dialer(Multiaddr::empty(), ConnectionId::from(1337usize)), + sender: ConnectionHandle::new(ConnectionId::from(1337usize), cmd_tx1), + }) + .await + .unwrap(); + + if let Some(TransportEvent::ConnectionEstablished { peer: connected_peer, endpoint }) = + service.next().await + { + assert_eq!(connected_peer, peer); + assert_eq!(endpoint.address(), &Multiaddr::empty()); + } else { + panic!("expected event from `TransportService`"); + }; + + // verify the first connection state is correct + assert_eq!(service.keep_alive_tracker.last_activity.len(), 1); + match service.connections.get(&peer) { + Some(context) => { + assert_eq!(context.primary.connection_id(), &ConnectionId::from(1337usize)); + // Check the connection is still active. + assert!(context.primary.is_active()); + assert!(context.secondary.is_none()); + }, + None => panic!("expected {peer} to exist"), + } + + // Open substreams to the peer. + let substream_id = service.open_substream(peer).unwrap(); + let second_substream_id = service.open_substream(peer).unwrap(); + + let mut permits = Vec::new(); + // First substream. + let protocol_command = cmd_rx1.recv().await.unwrap(); + match protocol_command { + ProtocolCommand::OpenSubstream { + protocol, + substream_id: opened_substream_id, + permit, + .. + } => { + assert_eq!(protocol, ProtocolName::from("/notif/1")); + assert_eq!(substream_id, opened_substream_id); + + // Save the substream permit for later. + permits.push(permit); + }, + _ => panic!("expected `ProtocolCommand::OpenSubstream`"), + } + + // Second substream. + let protocol_command = cmd_rx1.recv().await.unwrap(); + match protocol_command { + ProtocolCommand::OpenSubstream { + protocol, + substream_id: opened_substream_id, + permit, + .. + } => { + assert_eq!(protocol, ProtocolName::from("/notif/1")); + assert_eq!(second_substream_id, opened_substream_id); + + // Save the substream permit for later. + permits.push(permit); + }, + _ => panic!("expected `ProtocolCommand::OpenSubstream`"), + } + + // Sleep to trigger keep-alive timeout. + poll_service(&mut service).await; + tokio::time::sleep(KEEP_ALIVE_TIMEOUT + std::time::Duration::from_secs(1)).await; + poll_service(&mut service).await; + + // Verify the connection is downgraded. + match service.connections.get(&peer) { + Some(context) => { + assert_eq!(context.primary.connection_id(), &ConnectionId::from(1337usize)); + // Check the connection is not active. + assert!(!context.primary.is_active()); + assert!(context.secondary.is_none()); + }, + None => panic!("expected {peer} to exist"), + } + assert_eq!(service.keep_alive_tracker.last_activity.len(), 0); + + // Open a new substream to the peer. This will succeed as long as we still have + // at least substream permit. + let substream_id = service.open_substream(peer).unwrap(); + let protocol_command = cmd_rx1.recv().await.unwrap(); + match protocol_command { + ProtocolCommand::OpenSubstream { + protocol, + substream_id: opened_substream_id, + permit, + .. + } => { + assert_eq!(protocol, ProtocolName::from("/notif/1")); + assert_eq!(substream_id, opened_substream_id); + + // Save the substream permit for later. + permits.push(permit); + }, + _ => panic!("expected `ProtocolCommand::OpenSubstream`"), + } + + poll_service(&mut service).await; + + // Verify the connection is upgraded and keep-alive is tracked. + match service.connections.get(&peer) { + Some(context) => { + assert_eq!(context.primary.connection_id(), &ConnectionId::from(1337usize)); + // Check the connection is active, because it was upgraded by the last substream. + assert!(context.primary.is_active()); + assert!(context.secondary.is_none()); + }, + None => panic!("expected {peer} to exist"), + } + assert_eq!(service.keep_alive_tracker.last_activity.len(), 1); + + // Drop all substreams + drop(permits); + + // The connection is still active, because it was upgraded by the last substream open. + match service.connections.get(&peer) { + Some(context) => { + assert_eq!(context.primary.connection_id(), &ConnectionId::from(1337usize)); + // Check the connection is active, because it was upgraded by the last substream. + assert!(context.primary.is_active()); + assert!(context.secondary.is_none()); + }, + None => panic!("expected {peer} to exist"), + } + assert_eq!(service.keep_alive_tracker.last_activity.len(), 1); + + // Sleep to trigger keep-alive timeout. + poll_service(&mut service).await; + tokio::time::sleep(KEEP_ALIVE_TIMEOUT + std::time::Duration::from_secs(1)).await; + poll_service(&mut service).await; + + match service.connections.get(&peer) { + Some(context) => { + assert_eq!(context.primary.connection_id(), &ConnectionId::from(1337usize)); + // No longer active because it was downgraded by keep-alive and no + // substream opens were made. + assert!(!context.primary.is_active()); + assert!(context.secondary.is_none()); + }, + None => panic!("expected {peer} to exist"), + } + + // Cannot open a new substream because: + // 1. connection was downgraded by keep-alive timeout + // 2. all substreams were dropped. + assert_eq!(service.open_substream(peer), Err(SubstreamError::ConnectionClosed)); + } + + #[tokio::test] + async fn keep_alive_pop_elements() { + let mut tracker = KeepAliveTracker::new(Duration::from_secs(1)); + + let (peer1, connection1) = (PeerId::random(), ConnectionId::from(1usize)); + let (peer2, connection2) = (PeerId::random(), ConnectionId::from(2usize)); + let added_keys = HashSet::from([(peer1, connection1), (peer2, connection2)]); + + tracker.on_connection_established(peer1, connection1); + tracker.on_connection_established(peer2, connection2); + + tokio::time::sleep(Duration::from_secs(2)).await; + + let key = tracker.next().await.unwrap(); + assert!(added_keys.contains(&key)); + + let key = tracker.next().await.unwrap(); + assert!(added_keys.contains(&key)); + + // No more elements. + assert!(tracker.pending_keep_alive_timeouts.is_empty()); + assert!(tracker.last_activity.is_empty()); + } } diff --git a/client/litep2p/src/substream/mod.rs b/client/litep2p/src/substream/mod.rs index bf39046c..c27ca97c 100644 --- a/client/litep2p/src/substream/mod.rs +++ b/client/litep2p/src/substream/mod.rs @@ -22,7 +22,7 @@ //! Substream-related helper code. use crate::{ - codec::ProtocolCodec, error::SubstreamError, transport::tcp, types::SubstreamId, PeerId, + codec::ProtocolCodec, error::SubstreamError, transport::tcp, types::SubstreamId, PeerId, }; #[cfg(feature = "quic")] @@ -38,157 +38,157 @@ use tokio::io::{AsyncRead, AsyncWrite, AsyncWriteExt, ReadBuf}; use unsigned_varint::{decode, encode}; use std::{ - collections::{hash_map::Entry, HashMap, VecDeque}, - fmt, - hash::Hash, - io::ErrorKind, - pin::Pin, - task::{Context, Poll}, + collections::{hash_map::Entry, HashMap, VecDeque}, + fmt, + hash::Hash, + io::ErrorKind, + pin::Pin, + task::{Context, Poll}, }; /// Logging target for the file. const LOG_TARGET: &str = "litep2p::substream"; macro_rules! poll_flush { - ($substream:expr, $cx:ident) => {{ - match $substream { - SubstreamType::Tcp(substream) => Pin::new(substream).poll_flush($cx), - #[cfg(feature = "websocket")] - SubstreamType::WebSocket(substream) => Pin::new(substream).poll_flush($cx), - #[cfg(feature = "quic")] - SubstreamType::Quic(substream) => Pin::new(substream).poll_flush($cx), - #[cfg(feature = "webrtc")] - SubstreamType::WebRtc(substream) => Pin::new(substream).poll_flush($cx), - #[cfg(test)] - SubstreamType::Mock(_) => unreachable!(), - } - }}; + ($substream:expr, $cx:ident) => {{ + match $substream { + SubstreamType::Tcp(substream) => Pin::new(substream).poll_flush($cx), + #[cfg(feature = "websocket")] + SubstreamType::WebSocket(substream) => Pin::new(substream).poll_flush($cx), + #[cfg(feature = "quic")] + SubstreamType::Quic(substream) => Pin::new(substream).poll_flush($cx), + #[cfg(feature = "webrtc")] + SubstreamType::WebRtc(substream) => Pin::new(substream).poll_flush($cx), + #[cfg(test)] + SubstreamType::Mock(_) => unreachable!(), + } + }}; } macro_rules! poll_write { - ($substream:expr, $cx:ident, $frame:expr) => {{ - match $substream { - SubstreamType::Tcp(substream) => Pin::new(substream).poll_write($cx, $frame), - #[cfg(feature = "websocket")] - SubstreamType::WebSocket(substream) => Pin::new(substream).poll_write($cx, $frame), - #[cfg(feature = "quic")] - SubstreamType::Quic(substream) => Pin::new(substream).poll_write($cx, $frame), - #[cfg(feature = "webrtc")] - SubstreamType::WebRtc(substream) => Pin::new(substream).poll_write($cx, $frame), - #[cfg(test)] - SubstreamType::Mock(_) => unreachable!(), - } - }}; + ($substream:expr, $cx:ident, $frame:expr) => {{ + match $substream { + SubstreamType::Tcp(substream) => Pin::new(substream).poll_write($cx, $frame), + #[cfg(feature = "websocket")] + SubstreamType::WebSocket(substream) => Pin::new(substream).poll_write($cx, $frame), + #[cfg(feature = "quic")] + SubstreamType::Quic(substream) => Pin::new(substream).poll_write($cx, $frame), + #[cfg(feature = "webrtc")] + SubstreamType::WebRtc(substream) => Pin::new(substream).poll_write($cx, $frame), + #[cfg(test)] + SubstreamType::Mock(_) => unreachable!(), + } + }}; } macro_rules! poll_read { - ($substream:expr, $cx:ident, $buffer:expr) => {{ - match $substream { - SubstreamType::Tcp(substream) => Pin::new(substream).poll_read($cx, $buffer), - #[cfg(feature = "websocket")] - SubstreamType::WebSocket(substream) => Pin::new(substream).poll_read($cx, $buffer), - #[cfg(feature = "quic")] - SubstreamType::Quic(substream) => Pin::new(substream).poll_read($cx, $buffer), - #[cfg(feature = "webrtc")] - SubstreamType::WebRtc(substream) => Pin::new(substream).poll_read($cx, $buffer), - #[cfg(test)] - SubstreamType::Mock(_) => unreachable!(), - } - }}; + ($substream:expr, $cx:ident, $buffer:expr) => {{ + match $substream { + SubstreamType::Tcp(substream) => Pin::new(substream).poll_read($cx, $buffer), + #[cfg(feature = "websocket")] + SubstreamType::WebSocket(substream) => Pin::new(substream).poll_read($cx, $buffer), + #[cfg(feature = "quic")] + SubstreamType::Quic(substream) => Pin::new(substream).poll_read($cx, $buffer), + #[cfg(feature = "webrtc")] + SubstreamType::WebRtc(substream) => Pin::new(substream).poll_read($cx, $buffer), + #[cfg(test)] + SubstreamType::Mock(_) => unreachable!(), + } + }}; } macro_rules! poll_shutdown { - ($substream:expr, $cx:ident) => {{ - match $substream { - SubstreamType::Tcp(substream) => Pin::new(substream).poll_shutdown($cx), - #[cfg(feature = "websocket")] - SubstreamType::WebSocket(substream) => Pin::new(substream).poll_shutdown($cx), - #[cfg(feature = "quic")] - SubstreamType::Quic(substream) => Pin::new(substream).poll_shutdown($cx), - #[cfg(feature = "webrtc")] - SubstreamType::WebRtc(substream) => Pin::new(substream).poll_shutdown($cx), - #[cfg(test)] - SubstreamType::Mock(substream) => { - let _ = Pin::new(substream).poll_close($cx); - todo!(); - } - } - }}; + ($substream:expr, $cx:ident) => {{ + match $substream { + SubstreamType::Tcp(substream) => Pin::new(substream).poll_shutdown($cx), + #[cfg(feature = "websocket")] + SubstreamType::WebSocket(substream) => Pin::new(substream).poll_shutdown($cx), + #[cfg(feature = "quic")] + SubstreamType::Quic(substream) => Pin::new(substream).poll_shutdown($cx), + #[cfg(feature = "webrtc")] + SubstreamType::WebRtc(substream) => Pin::new(substream).poll_shutdown($cx), + #[cfg(test)] + SubstreamType::Mock(substream) => { + let _ = Pin::new(substream).poll_close($cx); + todo!(); + }, + } + }}; } macro_rules! delegate_poll_next { - ($substream:expr, $cx:ident) => {{ - #[cfg(test)] - if let SubstreamType::Mock(inner) = $substream { - return Pin::new(inner).poll_next($cx); - } - }}; + ($substream:expr, $cx:ident) => {{ + #[cfg(test)] + if let SubstreamType::Mock(inner) = $substream { + return Pin::new(inner).poll_next($cx); + } + }}; } macro_rules! delegate_poll_ready { - ($substream:expr, $cx:ident) => {{ - #[cfg(test)] - if let SubstreamType::Mock(inner) = $substream { - return Pin::new(inner).poll_ready($cx); - } - }}; + ($substream:expr, $cx:ident) => {{ + #[cfg(test)] + if let SubstreamType::Mock(inner) = $substream { + return Pin::new(inner).poll_ready($cx); + } + }}; } macro_rules! delegate_start_send { - ($substream:expr, $item:ident) => {{ - #[cfg(test)] - if let SubstreamType::Mock(inner) = $substream { - return Pin::new(inner).start_send($item); - } - }}; + ($substream:expr, $item:ident) => {{ + #[cfg(test)] + if let SubstreamType::Mock(inner) = $substream { + return Pin::new(inner).start_send($item); + } + }}; } macro_rules! delegate_poll_flush { - ($substream:expr, $cx:ident) => {{ - #[cfg(test)] - if let SubstreamType::Mock(inner) = $substream { - return Pin::new(inner).poll_flush($cx); - } - }}; + ($substream:expr, $cx:ident) => {{ + #[cfg(test)] + if let SubstreamType::Mock(inner) = $substream { + return Pin::new(inner).poll_flush($cx); + } + }}; } macro_rules! check_size { - ($max_size:expr, $size:expr) => {{ - if let Some(max_size) = $max_size { - if $size > max_size { - return Err(SubstreamError::IoError(ErrorKind::PermissionDenied).into()); - } - } - }}; + ($max_size:expr, $size:expr) => {{ + if let Some(max_size) = $max_size { + if $size > max_size { + return Err(SubstreamError::IoError(ErrorKind::PermissionDenied).into()); + } + } + }}; } /// Substream type. enum SubstreamType { - Tcp(tcp::Substream), - #[cfg(feature = "websocket")] - WebSocket(websocket::Substream), - #[cfg(feature = "quic")] - Quic(quic::Substream), - #[cfg(feature = "webrtc")] - WebRtc(webrtc::Substream), - #[cfg(test)] - Mock(Box), + Tcp(tcp::Substream), + #[cfg(feature = "websocket")] + WebSocket(websocket::Substream), + #[cfg(feature = "quic")] + Quic(quic::Substream), + #[cfg(feature = "webrtc")] + WebRtc(webrtc::Substream), + #[cfg(test)] + Mock(Box), } impl fmt::Debug for SubstreamType { - fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { - match self { - Self::Tcp(_) => write!(f, "Tcp"), - #[cfg(feature = "websocket")] - Self::WebSocket(_) => write!(f, "WebSocket"), - #[cfg(feature = "quic")] - Self::Quic(_) => write!(f, "Quic"), - #[cfg(feature = "webrtc")] - Self::WebRtc(_) => write!(f, "WebRtc"), - #[cfg(test)] - Self::Mock(_) => write!(f, "Mock"), - } - } + fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { + match self { + Self::Tcp(_) => write!(f, "Tcp"), + #[cfg(feature = "websocket")] + Self::WebSocket(_) => write!(f, "WebSocket"), + #[cfg(feature = "quic")] + Self::Quic(_) => write!(f, "Quic"), + #[cfg(feature = "webrtc")] + Self::WebRtc(_) => write!(f, "WebRtc"), + #[cfg(test)] + Self::Mock(_) => write!(f, "Mock"), + } + } } /// Backpressure boundary for `Sink`. @@ -203,573 +203,562 @@ const BACKPRESSURE_BOUNDARY: usize = 65536; /// [`Sink::send()`](futures::Sink)/[`Stream::next()`](futures::Stream) are also provided which /// implement the necessary framing to read/write codec-encoded messages from the underlying socket. pub struct Substream { - /// Remote peer ID. - peer: PeerId, + /// Remote peer ID. + peer: PeerId, - // Inner substream. - substream: SubstreamType, + // Inner substream. + substream: SubstreamType, - /// Substream ID. - substream_id: SubstreamId, + /// Substream ID. + substream_id: SubstreamId, - /// Protocol codec. - codec: ProtocolCodec, + /// Protocol codec. + codec: ProtocolCodec, - pending_out_frames: VecDeque, - pending_out_bytes: usize, - pending_out_frame: Option, + pending_out_frames: VecDeque, + pending_out_bytes: usize, + pending_out_frame: Option, - read_buffer: BytesMut, - offset: usize, - pending_frames: VecDeque, - current_frame_size: Option, + read_buffer: BytesMut, + offset: usize, + pending_frames: VecDeque, + current_frame_size: Option, - size_vec: BytesMut, + size_vec: BytesMut, } impl fmt::Debug for Substream { - fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { - f.debug_struct("Substream") - .field("peer", &self.peer) - .field("substream_id", &self.substream_id) - .field("codec", &self.codec) - .field("protocol", &self.substream) - .finish() - } + fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { + f.debug_struct("Substream") + .field("peer", &self.peer) + .field("substream_id", &self.substream_id) + .field("codec", &self.codec) + .field("protocol", &self.substream) + .finish() + } } impl Substream { - /// Create new [`Substream`]. - fn new( - peer: PeerId, - substream_id: SubstreamId, - substream: SubstreamType, - codec: ProtocolCodec, - ) -> Self { - Self { - peer, - substream, - codec, - substream_id, - read_buffer: BytesMut::zeroed(1024), - offset: 0usize, - pending_frames: VecDeque::new(), - current_frame_size: None, - pending_out_bytes: 0usize, - pending_out_frames: VecDeque::new(), - pending_out_frame: None, - size_vec: BytesMut::zeroed(10), - } - } - - /// Create new [`Substream`] for TCP. - pub(crate) fn new_tcp( - peer: PeerId, - substream_id: SubstreamId, - substream: tcp::Substream, - codec: ProtocolCodec, - ) -> Self { - tracing::trace!(target: LOG_TARGET, ?peer, ?codec, "create new substream for tcp"); - - Self::new(peer, substream_id, SubstreamType::Tcp(substream), codec) - } - - /// Create new [`Substream`] for WebSocket. - #[cfg(feature = "websocket")] - pub(crate) fn new_websocket( - peer: PeerId, - substream_id: SubstreamId, - substream: websocket::Substream, - codec: ProtocolCodec, - ) -> Self { - tracing::trace!(target: LOG_TARGET, ?peer, ?codec, "create new substream for websocket"); - - Self::new( - peer, - substream_id, - SubstreamType::WebSocket(substream), - codec, - ) - } - - /// Create new [`Substream`] for QUIC. - #[cfg(feature = "quic")] - pub(crate) fn new_quic( - peer: PeerId, - substream_id: SubstreamId, - substream: quic::Substream, - codec: ProtocolCodec, - ) -> Self { - tracing::trace!(target: LOG_TARGET, ?peer, ?codec, "create new substream for quic"); - - Self::new(peer, substream_id, SubstreamType::Quic(substream), codec) - } - - /// Create new [`Substream`] for WebRTC. - #[cfg(feature = "webrtc")] - pub(crate) fn new_webrtc( - peer: PeerId, - substream_id: SubstreamId, - substream: webrtc::Substream, - codec: ProtocolCodec, - ) -> Self { - tracing::trace!(target: LOG_TARGET, ?peer, ?codec, "create new substream for webrtc"); - - Self::new(peer, substream_id, SubstreamType::WebRtc(substream), codec) - } - - /// Create new [`Substream`] for mocking. - #[cfg(test)] - pub(crate) fn new_mock( - peer: PeerId, - substream_id: SubstreamId, - substream: Box, - ) -> Self { - tracing::trace!(target: LOG_TARGET, ?peer, "create new substream for mocking"); - - Self::new( - peer, - substream_id, - SubstreamType::Mock(substream), - ProtocolCodec::Unspecified, - ) - } - - /// Close the substream. - pub async fn close(self) { - let _ = match self.substream { - SubstreamType::Tcp(mut substream) => substream.shutdown().await, - #[cfg(feature = "websocket")] - SubstreamType::WebSocket(mut substream) => substream.shutdown().await, - #[cfg(feature = "quic")] - SubstreamType::Quic(mut substream) => substream.shutdown().await, - #[cfg(feature = "webrtc")] - SubstreamType::WebRtc(mut substream) => substream.shutdown().await, - #[cfg(test)] - SubstreamType::Mock(mut substream) => { - let _ = futures::SinkExt::close(&mut substream).await; - Ok(()) - } - }; - } - - /// Send identity payload to remote peer. - async fn send_identity_payload( - io: &mut T, - payload_size: usize, - payload: Bytes, - ) -> Result<(), SubstreamError> { - if payload.len() != payload_size { - return Err(SubstreamError::IoError(ErrorKind::PermissionDenied)); - } - - io.write_all(&payload).await.map_err(|_| SubstreamError::ConnectionClosed)?; - - // Flush the stream. - io.flush().await.map_err(From::from) - } - - /// Send unsigned varint payload to remote peer. - async fn send_unsigned_varint_payload( - io: &mut T, - bytes: Bytes, - max_size: Option, - ) -> Result<(), SubstreamError> { - if let Some(max_size) = max_size { - if bytes.len() > max_size { - return Err(SubstreamError::IoError(ErrorKind::PermissionDenied)); - } - } - - // Write the length of the frame. - let mut buffer = unsigned_varint::encode::usize_buffer(); - let encoded_len = unsigned_varint::encode::usize(bytes.len(), &mut buffer).len(); - io.write_all(&buffer[..encoded_len]).await?; - - // Write the frame. - io.write_all(bytes.as_ref()).await?; - - // Flush the stream. - io.flush().await.map_err(From::from) - } - - /// Send framed data to remote peer. - /// - /// This function may be faster than the provided [`futures::Sink`] implementation for - /// [`Substream`] as it has direct access to the API of the underlying socket as opposed - /// to going through [`tokio::io::AsyncWrite`]. - /// - /// # Cancel safety - /// - /// This method is not cancellation safe. If that is required, use the provided - /// [`futures::Sink`] implementation. - /// - /// # Panics - /// - /// Panics if no codec is provided. - pub async fn send_framed(&mut self, bytes: Bytes) -> Result<(), SubstreamError> { - tracing::trace!( - target: LOG_TARGET, - peer = ?self.peer, - codec = ?self.codec, - frame_len = ?bytes.len(), - "send framed" - ); - - match &mut self.substream { - #[cfg(test)] - SubstreamType::Mock(ref mut substream) => - futures::SinkExt::send(substream, bytes).await, - SubstreamType::Tcp(ref mut substream) => match self.codec { - ProtocolCodec::Unspecified => panic!("codec is unspecified"), - ProtocolCodec::Identity(payload_size) => - Self::send_identity_payload(substream, payload_size, bytes).await, - ProtocolCodec::UnsignedVarint(max_size) => - Self::send_unsigned_varint_payload(substream, bytes, max_size).await, - }, - #[cfg(feature = "websocket")] - SubstreamType::WebSocket(ref mut substream) => match self.codec { - ProtocolCodec::Unspecified => panic!("codec is unspecified"), - ProtocolCodec::Identity(payload_size) => - Self::send_identity_payload(substream, payload_size, bytes).await, - ProtocolCodec::UnsignedVarint(max_size) => - Self::send_unsigned_varint_payload(substream, bytes, max_size).await, - }, - #[cfg(feature = "quic")] - SubstreamType::Quic(ref mut substream) => match self.codec { - ProtocolCodec::Unspecified => panic!("codec is unspecified"), - ProtocolCodec::Identity(payload_size) => - Self::send_identity_payload(substream, payload_size, bytes).await, - ProtocolCodec::UnsignedVarint(max_size) => { - check_size!(max_size, bytes.len()); - - let mut buffer = unsigned_varint::encode::usize_buffer(); - let len = unsigned_varint::encode::usize(bytes.len(), &mut buffer); - let len = BytesMut::from(len); - - substream.write_all_chunks(&mut [len.freeze(), bytes]).await - } - }, - #[cfg(feature = "webrtc")] - SubstreamType::WebRtc(ref mut substream) => match self.codec { - ProtocolCodec::Unspecified => panic!("codec is unspecified"), - ProtocolCodec::Identity(payload_size) => - Self::send_identity_payload(substream, payload_size, bytes).await, - ProtocolCodec::UnsignedVarint(max_size) => - Self::send_unsigned_varint_payload(substream, bytes, max_size).await, - }, - } - } + /// Create new [`Substream`]. + fn new( + peer: PeerId, + substream_id: SubstreamId, + substream: SubstreamType, + codec: ProtocolCodec, + ) -> Self { + Self { + peer, + substream, + codec, + substream_id, + read_buffer: BytesMut::zeroed(1024), + offset: 0usize, + pending_frames: VecDeque::new(), + current_frame_size: None, + pending_out_bytes: 0usize, + pending_out_frames: VecDeque::new(), + pending_out_frame: None, + size_vec: BytesMut::zeroed(10), + } + } + + /// Create new [`Substream`] for TCP. + pub(crate) fn new_tcp( + peer: PeerId, + substream_id: SubstreamId, + substream: tcp::Substream, + codec: ProtocolCodec, + ) -> Self { + tracing::trace!(target: LOG_TARGET, ?peer, ?codec, "create new substream for tcp"); + + Self::new(peer, substream_id, SubstreamType::Tcp(substream), codec) + } + + /// Create new [`Substream`] for WebSocket. + #[cfg(feature = "websocket")] + pub(crate) fn new_websocket( + peer: PeerId, + substream_id: SubstreamId, + substream: websocket::Substream, + codec: ProtocolCodec, + ) -> Self { + tracing::trace!(target: LOG_TARGET, ?peer, ?codec, "create new substream for websocket"); + + Self::new(peer, substream_id, SubstreamType::WebSocket(substream), codec) + } + + /// Create new [`Substream`] for QUIC. + #[cfg(feature = "quic")] + pub(crate) fn new_quic( + peer: PeerId, + substream_id: SubstreamId, + substream: quic::Substream, + codec: ProtocolCodec, + ) -> Self { + tracing::trace!(target: LOG_TARGET, ?peer, ?codec, "create new substream for quic"); + + Self::new(peer, substream_id, SubstreamType::Quic(substream), codec) + } + + /// Create new [`Substream`] for WebRTC. + #[cfg(feature = "webrtc")] + pub(crate) fn new_webrtc( + peer: PeerId, + substream_id: SubstreamId, + substream: webrtc::Substream, + codec: ProtocolCodec, + ) -> Self { + tracing::trace!(target: LOG_TARGET, ?peer, ?codec, "create new substream for webrtc"); + + Self::new(peer, substream_id, SubstreamType::WebRtc(substream), codec) + } + + /// Create new [`Substream`] for mocking. + #[cfg(test)] + pub(crate) fn new_mock( + peer: PeerId, + substream_id: SubstreamId, + substream: Box, + ) -> Self { + tracing::trace!(target: LOG_TARGET, ?peer, "create new substream for mocking"); + + Self::new(peer, substream_id, SubstreamType::Mock(substream), ProtocolCodec::Unspecified) + } + + /// Close the substream. + pub async fn close(self) { + let _ = match self.substream { + SubstreamType::Tcp(mut substream) => substream.shutdown().await, + #[cfg(feature = "websocket")] + SubstreamType::WebSocket(mut substream) => substream.shutdown().await, + #[cfg(feature = "quic")] + SubstreamType::Quic(mut substream) => substream.shutdown().await, + #[cfg(feature = "webrtc")] + SubstreamType::WebRtc(mut substream) => substream.shutdown().await, + #[cfg(test)] + SubstreamType::Mock(mut substream) => { + let _ = futures::SinkExt::close(&mut substream).await; + Ok(()) + }, + }; + } + + /// Send identity payload to remote peer. + async fn send_identity_payload( + io: &mut T, + payload_size: usize, + payload: Bytes, + ) -> Result<(), SubstreamError> { + if payload.len() != payload_size { + return Err(SubstreamError::IoError(ErrorKind::PermissionDenied)); + } + + io.write_all(&payload).await.map_err(|_| SubstreamError::ConnectionClosed)?; + + // Flush the stream. + io.flush().await.map_err(From::from) + } + + /// Send unsigned varint payload to remote peer. + async fn send_unsigned_varint_payload( + io: &mut T, + bytes: Bytes, + max_size: Option, + ) -> Result<(), SubstreamError> { + if let Some(max_size) = max_size { + if bytes.len() > max_size { + return Err(SubstreamError::IoError(ErrorKind::PermissionDenied)); + } + } + + // Write the length of the frame. + let mut buffer = unsigned_varint::encode::usize_buffer(); + let encoded_len = unsigned_varint::encode::usize(bytes.len(), &mut buffer).len(); + io.write_all(&buffer[..encoded_len]).await?; + + // Write the frame. + io.write_all(bytes.as_ref()).await?; + + // Flush the stream. + io.flush().await.map_err(From::from) + } + + /// Send framed data to remote peer. + /// + /// This function may be faster than the provided [`futures::Sink`] implementation for + /// [`Substream`] as it has direct access to the API of the underlying socket as opposed + /// to going through [`tokio::io::AsyncWrite`]. + /// + /// # Cancel safety + /// + /// This method is not cancellation safe. If that is required, use the provided + /// [`futures::Sink`] implementation. + /// + /// # Panics + /// + /// Panics if no codec is provided. + pub async fn send_framed(&mut self, bytes: Bytes) -> Result<(), SubstreamError> { + tracing::trace!( + target: LOG_TARGET, + peer = ?self.peer, + codec = ?self.codec, + frame_len = ?bytes.len(), + "send framed" + ); + + match &mut self.substream { + #[cfg(test)] + SubstreamType::Mock(ref mut substream) => futures::SinkExt::send(substream, bytes).await, + SubstreamType::Tcp(ref mut substream) => match self.codec { + ProtocolCodec::Unspecified => panic!("codec is unspecified"), + ProtocolCodec::Identity(payload_size) => + Self::send_identity_payload(substream, payload_size, bytes).await, + ProtocolCodec::UnsignedVarint(max_size) => + Self::send_unsigned_varint_payload(substream, bytes, max_size).await, + }, + #[cfg(feature = "websocket")] + SubstreamType::WebSocket(ref mut substream) => match self.codec { + ProtocolCodec::Unspecified => panic!("codec is unspecified"), + ProtocolCodec::Identity(payload_size) => + Self::send_identity_payload(substream, payload_size, bytes).await, + ProtocolCodec::UnsignedVarint(max_size) => + Self::send_unsigned_varint_payload(substream, bytes, max_size).await, + }, + #[cfg(feature = "quic")] + SubstreamType::Quic(ref mut substream) => match self.codec { + ProtocolCodec::Unspecified => panic!("codec is unspecified"), + ProtocolCodec::Identity(payload_size) => + Self::send_identity_payload(substream, payload_size, bytes).await, + ProtocolCodec::UnsignedVarint(max_size) => { + check_size!(max_size, bytes.len()); + + let mut buffer = unsigned_varint::encode::usize_buffer(); + let len = unsigned_varint::encode::usize(bytes.len(), &mut buffer); + let len = BytesMut::from(len); + + substream.write_all_chunks(&mut [len.freeze(), bytes]).await + }, + }, + #[cfg(feature = "webrtc")] + SubstreamType::WebRtc(ref mut substream) => match self.codec { + ProtocolCodec::Unspecified => panic!("codec is unspecified"), + ProtocolCodec::Identity(payload_size) => + Self::send_identity_payload(substream, payload_size, bytes).await, + ProtocolCodec::UnsignedVarint(max_size) => + Self::send_unsigned_varint_payload(substream, bytes, max_size).await, + }, + } + } } impl tokio::io::AsyncRead for Substream { - fn poll_read( - mut self: Pin<&mut Self>, - cx: &mut Context<'_>, - buf: &mut tokio::io::ReadBuf<'_>, - ) -> Poll> { - poll_read!(&mut self.substream, cx, buf) - } + fn poll_read( + mut self: Pin<&mut Self>, + cx: &mut Context<'_>, + buf: &mut tokio::io::ReadBuf<'_>, + ) -> Poll> { + poll_read!(&mut self.substream, cx, buf) + } } impl tokio::io::AsyncWrite for Substream { - fn poll_write( - mut self: Pin<&mut Self>, - cx: &mut Context<'_>, - buf: &[u8], - ) -> Poll> { - poll_write!(&mut self.substream, cx, buf) - } - - fn poll_flush( - mut self: Pin<&mut Self>, - cx: &mut Context<'_>, - ) -> Poll> { - poll_flush!(&mut self.substream, cx) - } - - fn poll_shutdown( - mut self: Pin<&mut Self>, - cx: &mut Context<'_>, - ) -> Poll> { - poll_shutdown!(&mut self.substream, cx) - } + fn poll_write( + mut self: Pin<&mut Self>, + cx: &mut Context<'_>, + buf: &[u8], + ) -> Poll> { + poll_write!(&mut self.substream, cx, buf) + } + + fn poll_flush( + mut self: Pin<&mut Self>, + cx: &mut Context<'_>, + ) -> Poll> { + poll_flush!(&mut self.substream, cx) + } + + fn poll_shutdown( + mut self: Pin<&mut Self>, + cx: &mut Context<'_>, + ) -> Poll> { + poll_shutdown!(&mut self.substream, cx) + } } enum ReadError { - Overflow, - NotEnoughBytes, - DecodeError, + Overflow, + NotEnoughBytes, + DecodeError, } // Return the payload size and the number of bytes it took to encode it fn read_payload_size(buffer: &[u8]) -> Result<(usize, usize), ReadError> { - let max_len = encode::usize_buffer().len(); - - for i in 0..std::cmp::min(buffer.len(), max_len) { - if decode::is_last(buffer[i]) { - match decode::usize(&buffer[..=i]) { - Err(_) => return Err(ReadError::DecodeError), - Ok(size) => return Ok((size.0, i + 1)), - } - } - } - - match buffer.len() < max_len { - true => Err(ReadError::NotEnoughBytes), - false => Err(ReadError::Overflow), - } + let max_len = encode::usize_buffer().len(); + + for i in 0..std::cmp::min(buffer.len(), max_len) { + if decode::is_last(buffer[i]) { + match decode::usize(&buffer[..=i]) { + Err(_) => return Err(ReadError::DecodeError), + Ok(size) => return Ok((size.0, i + 1)), + } + } + } + + match buffer.len() < max_len { + true => Err(ReadError::NotEnoughBytes), + false => Err(ReadError::Overflow), + } } impl Stream for Substream { - type Item = Result; - - fn poll_next(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll> { - let this = Pin::into_inner(self); - - // `MockSubstream` implements `Stream` so calls to `poll_next()` must be delegated - delegate_poll_next!(&mut this.substream, cx); - - loop { - match this.codec { - ProtocolCodec::Identity(payload_size) => { - let mut read_buf = - ReadBuf::new(&mut this.read_buffer[this.offset..payload_size]); - - match futures::ready!(poll_read!(&mut this.substream, cx, &mut read_buf)) { - Ok(_) => { - let nread = read_buf.filled().len(); - if nread == 0 { - tracing::trace!( - target: LOG_TARGET, - peer = ?this.peer, - "read zero bytes, substream closed" - ); - return Poll::Ready(None); - } - - this.offset = this.offset.saturating_add(nread); - - if this.offset == payload_size { - let mut payload = std::mem::replace( - &mut this.read_buffer, - BytesMut::zeroed(payload_size), - ); - payload.truncate(payload_size); - this.offset = 0usize; - - return Poll::Ready(Some(Ok(payload))); - } - } - Err(error) => return Poll::Ready(Some(Err(error.into()))), - } - } - ProtocolCodec::UnsignedVarint(max_size) => { - loop { - // return all pending frames first - if let Some(frame) = this.pending_frames.pop_front() { - return Poll::Ready(Some(Ok(frame))); - } - - match this.current_frame_size.take() { - Some(frame_size) => { - let mut read_buf = - ReadBuf::new(&mut this.read_buffer[this.offset..]); - this.current_frame_size = Some(frame_size); - - match futures::ready!(poll_read!( - &mut this.substream, - cx, - &mut read_buf - )) { - Err(_error) => return Poll::Ready(None), - Ok(_) => { - let nread = match read_buf.filled().len() { - 0 => return Poll::Ready(None), - nread => nread, - }; - - this.offset += nread; - - if this.offset == frame_size { - let out_frame = std::mem::replace( - &mut this.read_buffer, - BytesMut::new(), - ); - this.offset = 0; - this.current_frame_size = None; - - return Poll::Ready(Some(Ok(out_frame))); - } else { - this.current_frame_size = Some(frame_size); - continue; - } - } - } - } - None => { - let mut read_buf = - ReadBuf::new(&mut this.size_vec[this.offset..this.offset + 1]); - - match futures::ready!(poll_read!( - &mut this.substream, - cx, - &mut read_buf - )) { - Err(_error) => return Poll::Ready(None), - Ok(_) => { - if read_buf.filled().is_empty() { - return Poll::Ready(None); - } - this.offset += 1; - - match read_payload_size(&this.size_vec[..this.offset]) { - Err(ReadError::NotEnoughBytes) => continue, - Err(_) => - return Poll::Ready(Some(Err( - SubstreamError::ReadFailure(Some( - this.substream_id, - )), - ))), - Ok((size, num_bytes)) => { - debug_assert_eq!(num_bytes, this.offset); - - if let Some(max_size) = max_size { - if size > max_size { - return Poll::Ready(Some(Err( - SubstreamError::ReadFailure(Some( - this.substream_id, - )), - ))); - } - } - - this.offset = 0; - // Handle empty payloads detected as 0-length frame. - // The offset must be cleared to 0 to not interfere - // with next framing. - if size == 0 { - return Poll::Ready(Some(Ok(BytesMut::new()))); - } - - this.current_frame_size = Some(size); - this.read_buffer = BytesMut::zeroed(size); - } - } - } - } - } - } - } - } - ProtocolCodec::Unspecified => panic!("codec is unspecified"), - } - } - } + type Item = Result; + + fn poll_next(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll> { + let this = Pin::into_inner(self); + + // `MockSubstream` implements `Stream` so calls to `poll_next()` must be delegated + delegate_poll_next!(&mut this.substream, cx); + + loop { + match this.codec { + ProtocolCodec::Identity(payload_size) => { + let mut read_buf = + ReadBuf::new(&mut this.read_buffer[this.offset..payload_size]); + + match futures::ready!(poll_read!(&mut this.substream, cx, &mut read_buf)) { + Ok(_) => { + let nread = read_buf.filled().len(); + if nread == 0 { + tracing::trace!( + target: LOG_TARGET, + peer = ?this.peer, + "read zero bytes, substream closed" + ); + return Poll::Ready(None); + } + + this.offset = this.offset.saturating_add(nread); + + if this.offset == payload_size { + let mut payload = std::mem::replace( + &mut this.read_buffer, + BytesMut::zeroed(payload_size), + ); + payload.truncate(payload_size); + this.offset = 0usize; + + return Poll::Ready(Some(Ok(payload))); + } + }, + Err(error) => return Poll::Ready(Some(Err(error.into()))), + } + }, + ProtocolCodec::UnsignedVarint(max_size) => { + loop { + // return all pending frames first + if let Some(frame) = this.pending_frames.pop_front() { + return Poll::Ready(Some(Ok(frame))); + } + + match this.current_frame_size.take() { + Some(frame_size) => { + let mut read_buf = + ReadBuf::new(&mut this.read_buffer[this.offset..]); + this.current_frame_size = Some(frame_size); + + match futures::ready!(poll_read!( + &mut this.substream, + cx, + &mut read_buf + )) { + Err(_error) => return Poll::Ready(None), + Ok(_) => { + let nread = match read_buf.filled().len() { + 0 => return Poll::Ready(None), + nread => nread, + }; + + this.offset += nread; + + if this.offset == frame_size { + let out_frame = std::mem::replace( + &mut this.read_buffer, + BytesMut::new(), + ); + this.offset = 0; + this.current_frame_size = None; + + return Poll::Ready(Some(Ok(out_frame))); + } else { + this.current_frame_size = Some(frame_size); + continue; + } + }, + } + }, + None => { + let mut read_buf = + ReadBuf::new(&mut this.size_vec[this.offset..this.offset + 1]); + + match futures::ready!(poll_read!( + &mut this.substream, + cx, + &mut read_buf + )) { + Err(_error) => return Poll::Ready(None), + Ok(_) => { + if read_buf.filled().is_empty() { + return Poll::Ready(None); + } + this.offset += 1; + + match read_payload_size(&this.size_vec[..this.offset]) { + Err(ReadError::NotEnoughBytes) => continue, + Err(_) => + return Poll::Ready(Some(Err( + SubstreamError::ReadFailure(Some( + this.substream_id, + )), + ))), + Ok((size, num_bytes)) => { + debug_assert_eq!(num_bytes, this.offset); + + if let Some(max_size) = max_size { + if size > max_size { + return Poll::Ready(Some(Err( + SubstreamError::ReadFailure(Some( + this.substream_id, + )), + ))); + } + } + + this.offset = 0; + // Handle empty payloads detected as 0-length frame. + // The offset must be cleared to 0 to not interfere + // with next framing. + if size == 0 { + return Poll::Ready(Some(Ok(BytesMut::new()))); + } + + this.current_frame_size = Some(size); + this.read_buffer = BytesMut::zeroed(size); + }, + } + }, + } + }, + } + } + }, + ProtocolCodec::Unspecified => panic!("codec is unspecified"), + } + } + } } // TODO: https://github.com/paritytech/litep2p/issues/341 this code can definitely be optimized impl Sink for Substream { - type Error = SubstreamError; - - fn poll_ready(mut self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll> { - // `MockSubstream` implements `Sink` so calls to `poll_ready()` must be delegated - delegate_poll_ready!(&mut self.substream, cx); - - if self.pending_out_bytes >= BACKPRESSURE_BOUNDARY { - // This attempts to empty 'pending_out_frames' into the socket. - match futures::Sink::poll_flush(self.as_mut(), cx) { - Poll::Ready(Ok(())) => {} - Poll::Ready(Err(e)) => return Poll::Ready(Err(e)), - Poll::Pending => { - // Still flushing. We cannot accept new data yet. - return Poll::Pending; - } - } - } - - Poll::Ready(Ok(())) - } - - fn start_send(mut self: Pin<&mut Self>, item: Bytes) -> Result<(), Self::Error> { - // `MockSubstream` implements `Sink` so calls to `start_send()` must be delegated - delegate_start_send!(&mut self.substream, item); - - tracing::trace!( - target: LOG_TARGET, - peer = ?self.peer, - substream_id = ?self.substream_id, - data_len = item.len(), - "Substream::start_send()", - ); - - match self.codec { - ProtocolCodec::Identity(payload_size) => { - if item.len() != payload_size { - return Err(SubstreamError::IoError(ErrorKind::PermissionDenied)); - } - - self.pending_out_bytes += item.len(); - self.pending_out_frames.push_back(item); - } - ProtocolCodec::UnsignedVarint(max_size) => { - check_size!(max_size, item.len()); - - let len = { - let mut buffer = unsigned_varint::encode::usize_buffer(); - let len = unsigned_varint::encode::usize(item.len(), &mut buffer); - BytesMut::from(len) - }; - - self.pending_out_bytes += len.len() + item.len(); - self.pending_out_frames.push_back(len.freeze()); - self.pending_out_frames.push_back(item); - } - ProtocolCodec::Unspecified => panic!("codec is unspecified"), - } - - Ok(()) - } - - fn poll_flush(mut self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll> { - // `MockSubstream` implements `Sink` so calls to `poll_flush()` must be delegated - delegate_poll_flush!(&mut self.substream, cx); - - loop { - let mut pending_frame = match self.pending_out_frame.take() { - Some(frame) => frame, - None => match self.pending_out_frames.pop_front() { - Some(frame) => frame, - None => break, - }, - }; - - match poll_write!(&mut self.substream, cx, &pending_frame) { - Poll::Ready(Err(error)) => return Poll::Ready(Err(error.into())), - Poll::Pending => { - self.pending_out_frame = Some(pending_frame); - break; - } - Poll::Ready(Ok(nwritten)) => { - pending_frame.advance(nwritten); - - // The number of pending bytes is reduced by the number of bytes written - // to ensure that backpressure is properly handled. - self.pending_out_bytes = self.pending_out_bytes.saturating_sub(nwritten); - - if !pending_frame.is_empty() { - self.pending_out_frame = Some(pending_frame); - } - } - } - } - - poll_flush!(&mut self.substream, cx).map_err(From::from) - } - - fn poll_close(mut self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll> { - poll_shutdown!(&mut self.substream, cx).map_err(From::from) - } + type Error = SubstreamError; + + fn poll_ready(mut self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll> { + // `MockSubstream` implements `Sink` so calls to `poll_ready()` must be delegated + delegate_poll_ready!(&mut self.substream, cx); + + if self.pending_out_bytes >= BACKPRESSURE_BOUNDARY { + // This attempts to empty 'pending_out_frames' into the socket. + match futures::Sink::poll_flush(self.as_mut(), cx) { + Poll::Ready(Ok(())) => {}, + Poll::Ready(Err(e)) => return Poll::Ready(Err(e)), + Poll::Pending => { + // Still flushing. We cannot accept new data yet. + return Poll::Pending; + }, + } + } + + Poll::Ready(Ok(())) + } + + fn start_send(mut self: Pin<&mut Self>, item: Bytes) -> Result<(), Self::Error> { + // `MockSubstream` implements `Sink` so calls to `start_send()` must be delegated + delegate_start_send!(&mut self.substream, item); + + tracing::trace!( + target: LOG_TARGET, + peer = ?self.peer, + substream_id = ?self.substream_id, + data_len = item.len(), + "Substream::start_send()", + ); + + match self.codec { + ProtocolCodec::Identity(payload_size) => { + if item.len() != payload_size { + return Err(SubstreamError::IoError(ErrorKind::PermissionDenied)); + } + + self.pending_out_bytes += item.len(); + self.pending_out_frames.push_back(item); + }, + ProtocolCodec::UnsignedVarint(max_size) => { + check_size!(max_size, item.len()); + + let len = { + let mut buffer = unsigned_varint::encode::usize_buffer(); + let len = unsigned_varint::encode::usize(item.len(), &mut buffer); + BytesMut::from(len) + }; + + self.pending_out_bytes += len.len() + item.len(); + self.pending_out_frames.push_back(len.freeze()); + self.pending_out_frames.push_back(item); + }, + ProtocolCodec::Unspecified => panic!("codec is unspecified"), + } + + Ok(()) + } + + fn poll_flush(mut self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll> { + // `MockSubstream` implements `Sink` so calls to `poll_flush()` must be delegated + delegate_poll_flush!(&mut self.substream, cx); + + loop { + let mut pending_frame = match self.pending_out_frame.take() { + Some(frame) => frame, + None => match self.pending_out_frames.pop_front() { + Some(frame) => frame, + None => break, + }, + }; + + match poll_write!(&mut self.substream, cx, &pending_frame) { + Poll::Ready(Err(error)) => return Poll::Ready(Err(error.into())), + Poll::Pending => { + self.pending_out_frame = Some(pending_frame); + break; + }, + Poll::Ready(Ok(nwritten)) => { + pending_frame.advance(nwritten); + + // The number of pending bytes is reduced by the number of bytes written + // to ensure that backpressure is properly handled. + self.pending_out_bytes = self.pending_out_bytes.saturating_sub(nwritten); + + if !pending_frame.is_empty() { + self.pending_out_frame = Some(pending_frame); + } + }, + } + } + + poll_flush!(&mut self.substream, cx).map_err(From::from) + } + + fn poll_close(mut self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll> { + poll_shutdown!(&mut self.substream, cx).map_err(From::from) + } } /// Substream set key. @@ -782,308 +771,306 @@ impl SubstreamSetKey for K #[derive(Debug, Default)] pub struct SubstreamSet where - K: SubstreamSetKey, - S: Stream> + Unpin, + K: SubstreamSetKey, + S: Stream> + Unpin, { - substreams: HashMap, + substreams: HashMap, } impl SubstreamSet where - K: SubstreamSetKey, - S: Stream> + Unpin, + K: SubstreamSetKey, + S: Stream> + Unpin, { - /// Create new [`SubstreamSet`]. - pub fn new() -> Self { - Self { - substreams: HashMap::new(), - } - } - - /// Add new substream to the set. - pub fn insert(&mut self, key: K, substream: S) { - match self.substreams.entry(key) { - Entry::Vacant(entry) => { - entry.insert(substream); - } - Entry::Occupied(_) => { - tracing::error!(?key, "substream already exists"); - debug_assert!(false); - } - } - } - - /// Remove substream from the set. - pub fn remove(&mut self, key: &K) -> Option { - self.substreams.remove(key) - } - - /// Get mutable reference to stored substream. - #[cfg(test)] - pub fn get_mut(&mut self, key: &K) -> Option<&mut S> { - self.substreams.get_mut(key) - } - - /// Get size of [`SubstreamSet`]. - pub fn len(&self) -> usize { - self.substreams.len() - } - - /// Check if [`SubstreamSet`] is empty. - pub fn is_empty(&self) -> bool { - self.substreams.is_empty() - } + /// Create new [`SubstreamSet`]. + pub fn new() -> Self { + Self { substreams: HashMap::new() } + } + + /// Add new substream to the set. + pub fn insert(&mut self, key: K, substream: S) { + match self.substreams.entry(key) { + Entry::Vacant(entry) => { + entry.insert(substream); + }, + Entry::Occupied(_) => { + tracing::error!(?key, "substream already exists"); + debug_assert!(false); + }, + } + } + + /// Remove substream from the set. + pub fn remove(&mut self, key: &K) -> Option { + self.substreams.remove(key) + } + + /// Get mutable reference to stored substream. + #[cfg(test)] + pub fn get_mut(&mut self, key: &K) -> Option<&mut S> { + self.substreams.get_mut(key) + } + + /// Get size of [`SubstreamSet`]. + pub fn len(&self) -> usize { + self.substreams.len() + } + + /// Check if [`SubstreamSet`] is empty. + pub fn is_empty(&self) -> bool { + self.substreams.is_empty() + } } impl Stream for SubstreamSet where - K: SubstreamSetKey, - S: Stream> + Unpin, + K: SubstreamSetKey, + S: Stream> + Unpin, { - type Item = (K, ::Item); - - fn poll_next(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll> { - let inner = Pin::into_inner(self); - - for (key, mut substream) in inner.substreams.iter_mut() { - match Pin::new(&mut substream).poll_next(cx) { - Poll::Pending => continue, - Poll::Ready(Some(data)) => return Poll::Ready(Some((*key, data))), - Poll::Ready(None) => - return Poll::Ready(Some((*key, Err(SubstreamError::ConnectionClosed)))), - } - } - - Poll::Pending - } + type Item = (K, ::Item); + + fn poll_next(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll> { + let inner = Pin::into_inner(self); + + for (key, mut substream) in inner.substreams.iter_mut() { + match Pin::new(&mut substream).poll_next(cx) { + Poll::Pending => continue, + Poll::Ready(Some(data)) => return Poll::Ready(Some((*key, data))), + Poll::Ready(None) => + return Poll::Ready(Some((*key, Err(SubstreamError::ConnectionClosed)))), + } + } + + Poll::Pending + } } #[cfg(test)] mod tests { - use super::*; - use crate::{mock::substream::MockSubstream, PeerId}; - use futures::{SinkExt, StreamExt}; - - #[test] - fn add_substream() { - let mut set = SubstreamSet::::new(); - - let peer = PeerId::random(); - let substream = MockSubstream::new(); - set.insert(peer, substream); - - let peer = PeerId::random(); - let substream = MockSubstream::new(); - set.insert(peer, substream); - } - - #[test] - #[should_panic] - #[cfg(debug_assertions)] - fn add_same_peer_twice() { - let mut set = SubstreamSet::::new(); - - let peer = PeerId::random(); - let substream1 = MockSubstream::new(); - let substream2 = MockSubstream::new(); - - set.insert(peer, substream1); - set.insert(peer, substream2); - } - - #[test] - fn remove_substream() { - let mut set = SubstreamSet::::new(); - - let peer1 = PeerId::random(); - let substream1 = MockSubstream::new(); - set.insert(peer1, substream1); - - let peer2 = PeerId::random(); - let substream2 = MockSubstream::new(); - set.insert(peer2, substream2); - - assert!(set.remove(&peer1).is_some()); - assert!(set.remove(&peer2).is_some()); - assert!(set.remove(&PeerId::random()).is_none()); - } - - #[tokio::test] - async fn poll_data_from_substream() { - let mut set = SubstreamSet::::new(); - - let peer = PeerId::random(); - let mut substream = MockSubstream::new(); - substream - .expect_poll_next() - .times(1) - .return_once(|_| Poll::Ready(Some(Ok(BytesMut::from(&b"hello"[..]))))); - substream - .expect_poll_next() - .times(1) - .return_once(|_| Poll::Ready(Some(Ok(BytesMut::from(&b"world"[..]))))); - substream.expect_poll_next().returning(|_| Poll::Pending); - set.insert(peer, substream); - - let value = set.next().await.unwrap(); - assert_eq!(value.0, peer); - assert_eq!(value.1.unwrap(), BytesMut::from(&b"hello"[..])); - - let value = set.next().await.unwrap(); - assert_eq!(value.0, peer); - assert_eq!(value.1.unwrap(), BytesMut::from(&b"world"[..])); - - assert!(futures::poll!(set.next()).is_pending()); - } - - #[tokio::test] - async fn substream_closed() { - let mut set = SubstreamSet::::new(); - - let peer = PeerId::random(); - let mut substream = MockSubstream::new(); - substream - .expect_poll_next() - .times(1) - .return_once(|_| Poll::Ready(Some(Ok(BytesMut::from(&b"hello"[..]))))); - substream.expect_poll_next().times(1).return_once(|_| Poll::Ready(None)); - substream.expect_poll_next().returning(|_| Poll::Pending); - set.insert(peer, substream); - - let value = set.next().await.unwrap(); - assert_eq!(value.0, peer); - assert_eq!(value.1.unwrap(), BytesMut::from(&b"hello"[..])); - - match set.next().await { - Some((exited_peer, Err(SubstreamError::ConnectionClosed))) => { - assert_eq!(peer, exited_peer); - } - _ => panic!("inavlid event received"), - } - } - - #[tokio::test] - async fn get_mut_substream() { - let _ = tracing_subscriber::fmt() - .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) - .try_init(); - - let mut set = SubstreamSet::::new(); - - let peer = PeerId::random(); - let mut substream = MockSubstream::new(); - substream - .expect_poll_next() - .times(1) - .return_once(|_| Poll::Ready(Some(Ok(BytesMut::from(&b"hello"[..]))))); - substream.expect_poll_ready().times(1).return_once(|_| Poll::Ready(Ok(()))); - substream.expect_start_send().times(1).return_once(|_| Ok(())); - substream.expect_poll_flush().times(1).return_once(|_| Poll::Ready(Ok(()))); - substream - .expect_poll_next() - .times(1) - .return_once(|_| Poll::Ready(Some(Ok(BytesMut::from(&b"world"[..]))))); - substream.expect_poll_next().returning(|_| Poll::Pending); - set.insert(peer, substream); - - let value = set.next().await.unwrap(); - assert_eq!(value.0, peer); - assert_eq!(value.1.unwrap(), BytesMut::from(&b"hello"[..])); - - let substream = set.get_mut(&peer).unwrap(); - substream.send(vec![1, 2, 3, 4].into()).await.unwrap(); - - let value = set.next().await.unwrap(); - assert_eq!(value.0, peer); - assert_eq!(value.1.unwrap(), BytesMut::from(&b"world"[..])); - - // try to get non-existent substream - assert!(set.get_mut(&PeerId::random()).is_none()); - } - - #[tokio::test] - async fn poll_data_from_two_substreams() { - let mut set = SubstreamSet::::new(); - - // prepare first substream - let peer1 = PeerId::random(); - let mut substream1 = MockSubstream::new(); - substream1 - .expect_poll_next() - .times(1) - .return_once(|_| Poll::Ready(Some(Ok(BytesMut::from(&b"hello"[..]))))); - substream1 - .expect_poll_next() - .times(1) - .return_once(|_| Poll::Ready(Some(Ok(BytesMut::from(&b"world"[..]))))); - substream1.expect_poll_next().returning(|_| Poll::Pending); - set.insert(peer1, substream1); - - // prepare second substream - let peer2 = PeerId::random(); - let mut substream2 = MockSubstream::new(); - substream2 - .expect_poll_next() - .times(1) - .return_once(|_| Poll::Ready(Some(Ok(BytesMut::from(&b"siip"[..]))))); - substream2 - .expect_poll_next() - .times(1) - .return_once(|_| Poll::Ready(Some(Ok(BytesMut::from(&b"huup"[..]))))); - substream2.expect_poll_next().returning(|_| Poll::Pending); - set.insert(peer2, substream2); - - let expected: Vec> = vec![ - vec![ - (peer1, BytesMut::from(&b"hello"[..])), - (peer1, BytesMut::from(&b"world"[..])), - (peer2, BytesMut::from(&b"siip"[..])), - (peer2, BytesMut::from(&b"huup"[..])), - ], - vec![ - (peer1, BytesMut::from(&b"hello"[..])), - (peer2, BytesMut::from(&b"siip"[..])), - (peer1, BytesMut::from(&b"world"[..])), - (peer2, BytesMut::from(&b"huup"[..])), - ], - vec![ - (peer2, BytesMut::from(&b"siip"[..])), - (peer2, BytesMut::from(&b"huup"[..])), - (peer1, BytesMut::from(&b"hello"[..])), - (peer1, BytesMut::from(&b"world"[..])), - ], - vec![ - (peer1, BytesMut::from(&b"hello"[..])), - (peer2, BytesMut::from(&b"siip"[..])), - (peer2, BytesMut::from(&b"huup"[..])), - (peer1, BytesMut::from(&b"world"[..])), - ], - ]; - - // poll values - let mut values = Vec::new(); - - for _ in 0..4 { - let value = set.next().await.unwrap(); - values.push((value.0, value.1.unwrap())); - } - - let mut correct_found = false; - - for set in expected { - if values == set { - correct_found = true; - break; - } - } - - if !correct_found { - panic!("invalid set generated"); - } - - // rest of the calls return `Poll::Pending` - for _ in 0..10 { - assert!(futures::poll!(set.next()).is_pending()); - } - } + use super::*; + use crate::{mock::substream::MockSubstream, PeerId}; + use futures::{SinkExt, StreamExt}; + + #[test] + fn add_substream() { + let mut set = SubstreamSet::::new(); + + let peer = PeerId::random(); + let substream = MockSubstream::new(); + set.insert(peer, substream); + + let peer = PeerId::random(); + let substream = MockSubstream::new(); + set.insert(peer, substream); + } + + #[test] + #[should_panic] + #[cfg(debug_assertions)] + fn add_same_peer_twice() { + let mut set = SubstreamSet::::new(); + + let peer = PeerId::random(); + let substream1 = MockSubstream::new(); + let substream2 = MockSubstream::new(); + + set.insert(peer, substream1); + set.insert(peer, substream2); + } + + #[test] + fn remove_substream() { + let mut set = SubstreamSet::::new(); + + let peer1 = PeerId::random(); + let substream1 = MockSubstream::new(); + set.insert(peer1, substream1); + + let peer2 = PeerId::random(); + let substream2 = MockSubstream::new(); + set.insert(peer2, substream2); + + assert!(set.remove(&peer1).is_some()); + assert!(set.remove(&peer2).is_some()); + assert!(set.remove(&PeerId::random()).is_none()); + } + + #[tokio::test] + async fn poll_data_from_substream() { + let mut set = SubstreamSet::::new(); + + let peer = PeerId::random(); + let mut substream = MockSubstream::new(); + substream + .expect_poll_next() + .times(1) + .return_once(|_| Poll::Ready(Some(Ok(BytesMut::from(&b"hello"[..]))))); + substream + .expect_poll_next() + .times(1) + .return_once(|_| Poll::Ready(Some(Ok(BytesMut::from(&b"world"[..]))))); + substream.expect_poll_next().returning(|_| Poll::Pending); + set.insert(peer, substream); + + let value = set.next().await.unwrap(); + assert_eq!(value.0, peer); + assert_eq!(value.1.unwrap(), BytesMut::from(&b"hello"[..])); + + let value = set.next().await.unwrap(); + assert_eq!(value.0, peer); + assert_eq!(value.1.unwrap(), BytesMut::from(&b"world"[..])); + + assert!(futures::poll!(set.next()).is_pending()); + } + + #[tokio::test] + async fn substream_closed() { + let mut set = SubstreamSet::::new(); + + let peer = PeerId::random(); + let mut substream = MockSubstream::new(); + substream + .expect_poll_next() + .times(1) + .return_once(|_| Poll::Ready(Some(Ok(BytesMut::from(&b"hello"[..]))))); + substream.expect_poll_next().times(1).return_once(|_| Poll::Ready(None)); + substream.expect_poll_next().returning(|_| Poll::Pending); + set.insert(peer, substream); + + let value = set.next().await.unwrap(); + assert_eq!(value.0, peer); + assert_eq!(value.1.unwrap(), BytesMut::from(&b"hello"[..])); + + match set.next().await { + Some((exited_peer, Err(SubstreamError::ConnectionClosed))) => { + assert_eq!(peer, exited_peer); + }, + _ => panic!("inavlid event received"), + } + } + + #[tokio::test] + async fn get_mut_substream() { + let _ = tracing_subscriber::fmt() + .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) + .try_init(); + + let mut set = SubstreamSet::::new(); + + let peer = PeerId::random(); + let mut substream = MockSubstream::new(); + substream + .expect_poll_next() + .times(1) + .return_once(|_| Poll::Ready(Some(Ok(BytesMut::from(&b"hello"[..]))))); + substream.expect_poll_ready().times(1).return_once(|_| Poll::Ready(Ok(()))); + substream.expect_start_send().times(1).return_once(|_| Ok(())); + substream.expect_poll_flush().times(1).return_once(|_| Poll::Ready(Ok(()))); + substream + .expect_poll_next() + .times(1) + .return_once(|_| Poll::Ready(Some(Ok(BytesMut::from(&b"world"[..]))))); + substream.expect_poll_next().returning(|_| Poll::Pending); + set.insert(peer, substream); + + let value = set.next().await.unwrap(); + assert_eq!(value.0, peer); + assert_eq!(value.1.unwrap(), BytesMut::from(&b"hello"[..])); + + let substream = set.get_mut(&peer).unwrap(); + substream.send(vec![1, 2, 3, 4].into()).await.unwrap(); + + let value = set.next().await.unwrap(); + assert_eq!(value.0, peer); + assert_eq!(value.1.unwrap(), BytesMut::from(&b"world"[..])); + + // try to get non-existent substream + assert!(set.get_mut(&PeerId::random()).is_none()); + } + + #[tokio::test] + async fn poll_data_from_two_substreams() { + let mut set = SubstreamSet::::new(); + + // prepare first substream + let peer1 = PeerId::random(); + let mut substream1 = MockSubstream::new(); + substream1 + .expect_poll_next() + .times(1) + .return_once(|_| Poll::Ready(Some(Ok(BytesMut::from(&b"hello"[..]))))); + substream1 + .expect_poll_next() + .times(1) + .return_once(|_| Poll::Ready(Some(Ok(BytesMut::from(&b"world"[..]))))); + substream1.expect_poll_next().returning(|_| Poll::Pending); + set.insert(peer1, substream1); + + // prepare second substream + let peer2 = PeerId::random(); + let mut substream2 = MockSubstream::new(); + substream2 + .expect_poll_next() + .times(1) + .return_once(|_| Poll::Ready(Some(Ok(BytesMut::from(&b"siip"[..]))))); + substream2 + .expect_poll_next() + .times(1) + .return_once(|_| Poll::Ready(Some(Ok(BytesMut::from(&b"huup"[..]))))); + substream2.expect_poll_next().returning(|_| Poll::Pending); + set.insert(peer2, substream2); + + let expected: Vec> = vec![ + vec![ + (peer1, BytesMut::from(&b"hello"[..])), + (peer1, BytesMut::from(&b"world"[..])), + (peer2, BytesMut::from(&b"siip"[..])), + (peer2, BytesMut::from(&b"huup"[..])), + ], + vec![ + (peer1, BytesMut::from(&b"hello"[..])), + (peer2, BytesMut::from(&b"siip"[..])), + (peer1, BytesMut::from(&b"world"[..])), + (peer2, BytesMut::from(&b"huup"[..])), + ], + vec![ + (peer2, BytesMut::from(&b"siip"[..])), + (peer2, BytesMut::from(&b"huup"[..])), + (peer1, BytesMut::from(&b"hello"[..])), + (peer1, BytesMut::from(&b"world"[..])), + ], + vec![ + (peer1, BytesMut::from(&b"hello"[..])), + (peer2, BytesMut::from(&b"siip"[..])), + (peer2, BytesMut::from(&b"huup"[..])), + (peer1, BytesMut::from(&b"world"[..])), + ], + ]; + + // poll values + let mut values = Vec::new(); + + for _ in 0..4 { + let value = set.next().await.unwrap(); + values.push((value.0, value.1.unwrap())); + } + + let mut correct_found = false; + + for set in expected { + if values == set { + correct_found = true; + break; + } + } + + if !correct_found { + panic!("invalid set generated"); + } + + // rest of the calls return `Poll::Pending` + for _ in 0..10 { + assert!(futures::poll!(set.next()).is_pending()); + } + } } diff --git a/client/litep2p/src/transport/common/listener.rs b/client/litep2p/src/transport/common/listener.rs index 856b4c19..e89d7887 100644 --- a/client/litep2p/src/transport/common/listener.rs +++ b/client/litep2p/src/transport/common/listener.rs @@ -21,8 +21,8 @@ //! Shared socket listener between TCP and WebSocket. use crate::{ - error::{AddressError, DnsError}, - PeerId, + error::{AddressError, DnsError}, + PeerId, }; use futures::Stream; @@ -33,11 +33,11 @@ use socket2::{Domain, Socket, Type}; use tokio::net::{TcpListener as TokioTcpListener, TcpStream}; use std::{ - io, - net::{IpAddr, Ipv4Addr, Ipv6Addr, SocketAddr}, - pin::Pin, - sync::Arc, - task::{Context, Poll}, + io, + net::{IpAddr, Ipv4Addr, Ipv6Addr, SocketAddr}, + pin::Pin, + sync::Arc, + task::{Context, Poll}, }; /// Logging target for the file. @@ -46,159 +46,149 @@ const LOG_TARGET: &str = "litep2p::transport::listener"; /// Address type. #[derive(Debug)] pub enum AddressType { - /// Socket address. - Socket(SocketAddr), - - /// DNS address. - Dns { - address: String, - port: u16, - dns_type: DnsType, - }, + /// Socket address. + Socket(SocketAddr), + + /// DNS address. + Dns { address: String, port: u16, dns_type: DnsType }, } /// The DNS type of the address. #[derive(Debug, Clone, Copy, PartialEq, Eq)] pub enum DnsType { - /// DNS supports both IPv4 and IPv6. - Dns, - /// DNS supports only IPv4. - Dns4, - /// DNS supports only IPv6. - Dns6, + /// DNS supports both IPv4 and IPv6. + Dns, + /// DNS supports only IPv4. + Dns4, + /// DNS supports only IPv6. + Dns6, } impl AddressType { - /// Resolve the address to a concrete IP. - pub async fn lookup_ip(self, resolver: Arc) -> Result { - let (url, port, dns_type) = match self { - // We already have the IP address. - AddressType::Socket(address) => return Ok(address), - AddressType::Dns { - address, - port, - dns_type, - } => (address, port, dns_type), - }; - - let lookup = match resolver.lookup_ip(url.clone()).await { - Ok(lookup) => lookup, - Err(error) => { - tracing::debug!( - target: LOG_TARGET, - ?error, - "failed to resolve DNS address `{}`", - url - ); - - return Err(DnsError::ResolveError(url)); - } - }; - - let Some(ip) = lookup.iter().find(|ip| match dns_type { - DnsType::Dns => true, - DnsType::Dns4 => ip.is_ipv4(), - DnsType::Dns6 => ip.is_ipv6(), - }) else { - tracing::debug!( - target: LOG_TARGET, - "Multiaddr DNS type does not match IP version `{}`", - url - ); - return Err(DnsError::IpVersionMismatch); - }; - - Ok(SocketAddr::new(ip, port)) - } + /// Resolve the address to a concrete IP. + pub async fn lookup_ip(self, resolver: Arc) -> Result { + let (url, port, dns_type) = match self { + // We already have the IP address. + AddressType::Socket(address) => return Ok(address), + AddressType::Dns { address, port, dns_type } => (address, port, dns_type), + }; + + let lookup = match resolver.lookup_ip(url.clone()).await { + Ok(lookup) => lookup, + Err(error) => { + tracing::debug!( + target: LOG_TARGET, + ?error, + "failed to resolve DNS address `{}`", + url + ); + + return Err(DnsError::ResolveError(url)); + }, + }; + + let Some(ip) = lookup.iter().find(|ip| match dns_type { + DnsType::Dns => true, + DnsType::Dns4 => ip.is_ipv4(), + DnsType::Dns6 => ip.is_ipv6(), + }) else { + tracing::debug!( + target: LOG_TARGET, + "Multiaddr DNS type does not match IP version `{}`", + url + ); + return Err(DnsError::IpVersionMismatch); + }; + + Ok(SocketAddr::new(ip, port)) + } } /// Local addresses to use for outbound connections. #[derive(Clone, Default)] pub enum DialAddresses { - /// Reuse port from listen addresses. - Reuse { - listen_addresses: Arc>, - }, - /// Do not reuse port. - #[default] - NoReuse, + /// Reuse port from listen addresses. + Reuse { listen_addresses: Arc> }, + /// Do not reuse port. + #[default] + NoReuse, } impl DialAddresses { - /// Get local dial address for an outbound connection. - pub fn local_dial_address(&self, remote_address: &IpAddr) -> Result, ()> { - match self { - DialAddresses::Reuse { listen_addresses } => { - for address in listen_addresses.iter() { - if remote_address.is_ipv4() == address.is_ipv4() - && remote_address.is_loopback() == address.ip().is_loopback() - { - if remote_address.is_ipv4() { - return Ok(Some(SocketAddr::new( - IpAddr::V4(Ipv4Addr::UNSPECIFIED), - address.port(), - ))); - } else { - return Ok(Some(SocketAddr::new( - IpAddr::V6(Ipv6Addr::UNSPECIFIED), - address.port(), - ))); - } - } - } - - Err(()) - } - DialAddresses::NoReuse => Ok(None), - } - } + /// Get local dial address for an outbound connection. + pub fn local_dial_address(&self, remote_address: &IpAddr) -> Result, ()> { + match self { + DialAddresses::Reuse { listen_addresses } => { + for address in listen_addresses.iter() { + if remote_address.is_ipv4() == address.is_ipv4() && + remote_address.is_loopback() == address.ip().is_loopback() + { + if remote_address.is_ipv4() { + return Ok(Some(SocketAddr::new( + IpAddr::V4(Ipv4Addr::UNSPECIFIED), + address.port(), + ))); + } else { + return Ok(Some(SocketAddr::new( + IpAddr::V6(Ipv6Addr::UNSPECIFIED), + address.port(), + ))); + } + } + } + + Err(()) + }, + DialAddresses::NoReuse => Ok(None), + } + } } /// Socket listening to zero or more addresses. pub struct SocketListener { - /// Listeners. - listeners: Vec, - /// The index in the listeners from which the polling is resumed. - poll_index: usize, + /// Listeners. + listeners: Vec, + /// The index in the listeners from which the polling is resumed. + poll_index: usize, } /// Trait to convert between `Multiaddr` and `SocketAddr`. pub trait GetSocketAddr { - /// Convert `Multiaddr` to `SocketAddr`. - /// - /// # Note - /// - /// This method is called from two main code paths: - /// - When creating a new `SocketListener` to bind to a specific address. - /// - When dialing a new connection to a remote address. - /// - /// The `AddressType` is either `SocketAddr` or a `Dns` address. - /// For the `Dns` the concrete IP address is resolved later in our code. - /// - /// The `PeerId` is optional and may not be present. - fn multiaddr_to_socket_address( - address: &Multiaddr, - ) -> Result<(AddressType, Option), AddressError>; - - /// Convert concrete `SocketAddr` to `Multiaddr`. - fn socket_address_to_multiaddr(address: &SocketAddr) -> Multiaddr; + /// Convert `Multiaddr` to `SocketAddr`. + /// + /// # Note + /// + /// This method is called from two main code paths: + /// - When creating a new `SocketListener` to bind to a specific address. + /// - When dialing a new connection to a remote address. + /// + /// The `AddressType` is either `SocketAddr` or a `Dns` address. + /// For the `Dns` the concrete IP address is resolved later in our code. + /// + /// The `PeerId` is optional and may not be present. + fn multiaddr_to_socket_address( + address: &Multiaddr, + ) -> Result<(AddressType, Option), AddressError>; + + /// Convert concrete `SocketAddr` to `Multiaddr`. + fn socket_address_to_multiaddr(address: &SocketAddr) -> Multiaddr; } /// TCP helper to convert between `Multiaddr` and `SocketAddr`. pub struct TcpAddress; impl GetSocketAddr for TcpAddress { - fn multiaddr_to_socket_address( - address: &Multiaddr, - ) -> Result<(AddressType, Option), AddressError> { - multiaddr_to_socket_address(address, SocketListenerType::Tcp) - } - - fn socket_address_to_multiaddr(address: &SocketAddr) -> Multiaddr { - Multiaddr::empty() - .with(Protocol::from(address.ip())) - .with(Protocol::Tcp(address.port())) - } + fn multiaddr_to_socket_address( + address: &Multiaddr, + ) -> Result<(AddressType, Option), AddressError> { + multiaddr_to_socket_address(address, SocketListenerType::Tcp) + } + + fn socket_address_to_multiaddr(address: &SocketAddr) -> Multiaddr { + Multiaddr::empty() + .with(Protocol::from(address.ip())) + .with(Protocol::Tcp(address.port())) + } } /// WebSocket helper to convert between `Multiaddr` and `SocketAddr`. @@ -207,547 +197,528 @@ pub struct WebSocketAddress; #[cfg(feature = "websocket")] impl GetSocketAddr for WebSocketAddress { - fn multiaddr_to_socket_address( - address: &Multiaddr, - ) -> Result<(AddressType, Option), AddressError> { - multiaddr_to_socket_address(address, SocketListenerType::WebSocket) - } - - fn socket_address_to_multiaddr(address: &SocketAddr) -> Multiaddr { - Multiaddr::empty() - .with(Protocol::from(address.ip())) - .with(Protocol::Tcp(address.port())) - .with(Protocol::Ws(std::borrow::Cow::Borrowed("/"))) - } + fn multiaddr_to_socket_address( + address: &Multiaddr, + ) -> Result<(AddressType, Option), AddressError> { + multiaddr_to_socket_address(address, SocketListenerType::WebSocket) + } + + fn socket_address_to_multiaddr(address: &SocketAddr) -> Multiaddr { + Multiaddr::empty() + .with(Protocol::from(address.ip())) + .with(Protocol::Tcp(address.port())) + .with(Protocol::Ws(std::borrow::Cow::Borrowed("/"))) + } } impl SocketListener { - /// Create new [`SocketListener`] - pub fn new( - addresses: Vec, - reuse_port: bool, - nodelay: bool, - ) -> (Self, Vec, DialAddresses) { - let (listeners, listen_addresses): (_, Vec>) = addresses - .into_iter() - .filter_map(|address| { - let address = match T::multiaddr_to_socket_address(&address).ok()?.0 { - AddressType::Dns { address, port, .. } => { - tracing::debug!( - target: LOG_TARGET, - ?address, - ?port, - "dns not supported as bind address" - ); - - return None; - } - AddressType::Socket(address) => address, - }; - - let socket = if address.is_ipv4() { - Socket::new(Domain::IPV4, Type::STREAM, Some(socket2::Protocol::TCP)).ok()? - } else { - let socket = - Socket::new(Domain::IPV6, Type::STREAM, Some(socket2::Protocol::TCP)) - .ok()?; - socket.set_only_v6(true).ok()?; - socket - }; - - socket.set_nodelay(nodelay).ok()?; - socket.set_nonblocking(true).ok()?; - socket.set_reuse_address(true).ok()?; - #[cfg(unix)] - if reuse_port { - socket.set_reuse_port(true).ok()?; - } - socket.bind(&address.into()).ok()?; - socket.listen(1024).ok()?; - - let socket: std::net::TcpListener = socket.into(); - let listener = TokioTcpListener::from_std(socket).ok()?; - let local_address = listener.local_addr().ok()?; - - let listen_addresses = if address.ip().is_unspecified() { - match NetworkInterface::show() { - Ok(ifaces) => ifaces - .into_iter() - .flat_map(|record| { - record.addr.into_iter().filter_map(|iface_address| { - match (iface_address, address.is_ipv4()) { - (Addr::V4(inner), true) => Some(SocketAddr::new( - IpAddr::V4(inner.ip), - local_address.port(), - )), - (Addr::V6(inner), false) => { - match inner.ip.segments().first() { - Some(0xfe80) => None, - _ => Some(SocketAddr::new( - IpAddr::V6(inner.ip), - local_address.port(), - )), - } - } - _ => None, - } - }) - }) - .collect(), - Err(error) => { - tracing::warn!( - target: LOG_TARGET, - ?error, - "failed to fetch network interfaces", - ); - - return None; - } - } - } else { - vec![local_address] - }; - - Some((listener, listen_addresses)) - }) - .unzip(); - - let listen_addresses = listen_addresses.into_iter().flatten().collect::>(); - let listen_multi_addresses = - listen_addresses.iter().map(T::socket_address_to_multiaddr).collect(); - - let dial_addresses = if reuse_port { - DialAddresses::Reuse { - listen_addresses: Arc::new(listen_addresses), - } - } else { - DialAddresses::NoReuse - }; - - ( - Self { - listeners, - poll_index: 0, - }, - listen_multi_addresses, - dial_addresses, - ) - } + /// Create new [`SocketListener`] + pub fn new( + addresses: Vec, + reuse_port: bool, + nodelay: bool, + ) -> (Self, Vec, DialAddresses) { + let (listeners, listen_addresses): (_, Vec>) = addresses + .into_iter() + .filter_map(|address| { + let address = match T::multiaddr_to_socket_address(&address).ok()?.0 { + AddressType::Dns { address, port, .. } => { + tracing::debug!( + target: LOG_TARGET, + ?address, + ?port, + "dns not supported as bind address" + ); + + return None; + }, + AddressType::Socket(address) => address, + }; + + let socket = if address.is_ipv4() { + Socket::new(Domain::IPV4, Type::STREAM, Some(socket2::Protocol::TCP)).ok()? + } else { + let socket = + Socket::new(Domain::IPV6, Type::STREAM, Some(socket2::Protocol::TCP)) + .ok()?; + socket.set_only_v6(true).ok()?; + socket + }; + + socket.set_nodelay(nodelay).ok()?; + socket.set_nonblocking(true).ok()?; + socket.set_reuse_address(true).ok()?; + #[cfg(unix)] + if reuse_port { + socket.set_reuse_port(true).ok()?; + } + socket.bind(&address.into()).ok()?; + socket.listen(1024).ok()?; + + let socket: std::net::TcpListener = socket.into(); + let listener = TokioTcpListener::from_std(socket).ok()?; + let local_address = listener.local_addr().ok()?; + + let listen_addresses = if address.ip().is_unspecified() { + match NetworkInterface::show() { + Ok(ifaces) => ifaces + .into_iter() + .flat_map(|record| { + record.addr.into_iter().filter_map(|iface_address| { + match (iface_address, address.is_ipv4()) { + (Addr::V4(inner), true) => Some(SocketAddr::new( + IpAddr::V4(inner.ip), + local_address.port(), + )), + (Addr::V6(inner), false) => { + match inner.ip.segments().first() { + Some(0xfe80) => None, + _ => Some(SocketAddr::new( + IpAddr::V6(inner.ip), + local_address.port(), + )), + } + }, + _ => None, + } + }) + }) + .collect(), + Err(error) => { + tracing::warn!( + target: LOG_TARGET, + ?error, + "failed to fetch network interfaces", + ); + + return None; + }, + } + } else { + vec![local_address] + }; + + Some((listener, listen_addresses)) + }) + .unzip(); + + let listen_addresses = listen_addresses.into_iter().flatten().collect::>(); + let listen_multi_addresses = + listen_addresses.iter().map(T::socket_address_to_multiaddr).collect(); + + let dial_addresses = if reuse_port { + DialAddresses::Reuse { listen_addresses: Arc::new(listen_addresses) } + } else { + DialAddresses::NoReuse + }; + + (Self { listeners, poll_index: 0 }, listen_multi_addresses, dial_addresses) + } } /// The type of the socket listener. #[derive(Clone, Copy, PartialEq, Eq)] enum SocketListenerType { - /// Listener for TCP. - Tcp, - /// Listener for WebSocket. - #[cfg(feature = "websocket")] - WebSocket, + /// Listener for TCP. + Tcp, + /// Listener for WebSocket. + #[cfg(feature = "websocket")] + WebSocket, } /// Extract socket address and `PeerId`, if found, from `address`. fn multiaddr_to_socket_address( - address: &Multiaddr, - ty: SocketListenerType, + address: &Multiaddr, + ty: SocketListenerType, ) -> Result<(AddressType, Option), AddressError> { - tracing::trace!(target: LOG_TARGET, ?address, "parse multi address"); - - let mut iter = address.iter(); - // Small helper to handle DNS types. - let handle_dns_type = - |address: String, dns_type: DnsType, protocol: Option| match protocol { - Some(Protocol::Tcp(port)) => Ok(AddressType::Dns { - address, - port, - dns_type, - }), - protocol => { - tracing::error!( - target: LOG_TARGET, - ?protocol, - "invalid transport protocol, expected `Tcp`", - ); - Err(AddressError::InvalidProtocol) - } - }; - - let socket_address = match iter.next() { - Some(Protocol::Ip6(address)) => match iter.next() { - Some(Protocol::Tcp(port)) => - AddressType::Socket(SocketAddr::new(IpAddr::V6(address), port)), - protocol => { - tracing::error!( - target: LOG_TARGET, - ?protocol, - "invalid transport protocol, expected `Tcp`", - ); - return Err(AddressError::InvalidProtocol); - } - }, - Some(Protocol::Ip4(address)) => match iter.next() { - Some(Protocol::Tcp(port)) => - AddressType::Socket(SocketAddr::new(IpAddr::V4(address), port)), - protocol => { - tracing::error!( - target: LOG_TARGET, - ?protocol, - "invalid transport protocol, expected `Tcp`", - ); - return Err(AddressError::InvalidProtocol); - } - }, - Some(Protocol::Dns(address)) => handle_dns_type(address.into(), DnsType::Dns, iter.next())?, - Some(Protocol::Dns4(address)) => - handle_dns_type(address.into(), DnsType::Dns4, iter.next())?, - Some(Protocol::Dns6(address)) => - handle_dns_type(address.into(), DnsType::Dns6, iter.next())?, - protocol => { - tracing::error!(target: LOG_TARGET, ?protocol, "invalid transport protocol"); - return Err(AddressError::InvalidProtocol); - } - }; - - match ty { - SocketListenerType::Tcp => (), - #[cfg(feature = "websocket")] - SocketListenerType::WebSocket => { - // verify that `/ws`/`/wss` is part of the multi address - match iter.next() { - Some(Protocol::Ws(_address)) => {} - Some(Protocol::Wss(_address)) => {} - protocol => { - tracing::error!( - target: LOG_TARGET, - ?protocol, - "invalid protocol, expected `Ws` or `Wss`" - ); - return Err(AddressError::InvalidProtocol); - } - }; - } - } - - let maybe_peer = match iter.next() { - Some(Protocol::P2p(multihash)) => - Some(PeerId::from_multihash(multihash).map_err(AddressError::InvalidPeerId)?), - None => None, - protocol => { - tracing::error!( - target: LOG_TARGET, - ?protocol, - "invalid protocol, expected `P2p` or `None`" - ); - return Err(AddressError::InvalidProtocol); - } - }; - - Ok((socket_address, maybe_peer)) + tracing::trace!(target: LOG_TARGET, ?address, "parse multi address"); + + let mut iter = address.iter(); + // Small helper to handle DNS types. + let handle_dns_type = + |address: String, dns_type: DnsType, protocol: Option| match protocol { + Some(Protocol::Tcp(port)) => Ok(AddressType::Dns { address, port, dns_type }), + protocol => { + tracing::error!( + target: LOG_TARGET, + ?protocol, + "invalid transport protocol, expected `Tcp`", + ); + Err(AddressError::InvalidProtocol) + }, + }; + + let socket_address = match iter.next() { + Some(Protocol::Ip6(address)) => match iter.next() { + Some(Protocol::Tcp(port)) => + AddressType::Socket(SocketAddr::new(IpAddr::V6(address), port)), + protocol => { + tracing::error!( + target: LOG_TARGET, + ?protocol, + "invalid transport protocol, expected `Tcp`", + ); + return Err(AddressError::InvalidProtocol); + }, + }, + Some(Protocol::Ip4(address)) => match iter.next() { + Some(Protocol::Tcp(port)) => + AddressType::Socket(SocketAddr::new(IpAddr::V4(address), port)), + protocol => { + tracing::error!( + target: LOG_TARGET, + ?protocol, + "invalid transport protocol, expected `Tcp`", + ); + return Err(AddressError::InvalidProtocol); + }, + }, + Some(Protocol::Dns(address)) => handle_dns_type(address.into(), DnsType::Dns, iter.next())?, + Some(Protocol::Dns4(address)) => + handle_dns_type(address.into(), DnsType::Dns4, iter.next())?, + Some(Protocol::Dns6(address)) => + handle_dns_type(address.into(), DnsType::Dns6, iter.next())?, + protocol => { + tracing::error!(target: LOG_TARGET, ?protocol, "invalid transport protocol"); + return Err(AddressError::InvalidProtocol); + }, + }; + + match ty { + SocketListenerType::Tcp => (), + #[cfg(feature = "websocket")] + SocketListenerType::WebSocket => { + // verify that `/ws`/`/wss` is part of the multi address + match iter.next() { + Some(Protocol::Ws(_address)) => {}, + Some(Protocol::Wss(_address)) => {}, + protocol => { + tracing::error!( + target: LOG_TARGET, + ?protocol, + "invalid protocol, expected `Ws` or `Wss`" + ); + return Err(AddressError::InvalidProtocol); + }, + }; + }, + } + + let maybe_peer = match iter.next() { + Some(Protocol::P2p(multihash)) => + Some(PeerId::from_multihash(multihash).map_err(AddressError::InvalidPeerId)?), + None => None, + protocol => { + tracing::error!( + target: LOG_TARGET, + ?protocol, + "invalid protocol, expected `P2p` or `None`" + ); + return Err(AddressError::InvalidProtocol); + }, + }; + + Ok((socket_address, maybe_peer)) } impl Stream for SocketListener { - type Item = io::Result<(TcpStream, SocketAddr)>; - - fn poll_next(mut self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll> { - if self.listeners.is_empty() { - return Poll::Pending; - } - - let len = self.listeners.len(); - for index in 0..len { - let current = (self.poll_index + index) % len; - let listener = &mut self.listeners[current]; - - match listener.poll_accept(cx) { - Poll::Pending => {} - Poll::Ready(Err(error)) => { - self.poll_index = (self.poll_index + 1) % len; - return Poll::Ready(Some(Err(error))); - } - Poll::Ready(Ok((stream, address))) => { - self.poll_index = (self.poll_index + 1) % len; - return Poll::Ready(Some(Ok((stream, address)))); - } - } - } - - self.poll_index = (self.poll_index + 1) % len; - Poll::Pending - } + type Item = io::Result<(TcpStream, SocketAddr)>; + + fn poll_next(mut self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll> { + if self.listeners.is_empty() { + return Poll::Pending; + } + + let len = self.listeners.len(); + for index in 0..len { + let current = (self.poll_index + index) % len; + let listener = &mut self.listeners[current]; + + match listener.poll_accept(cx) { + Poll::Pending => {}, + Poll::Ready(Err(error)) => { + self.poll_index = (self.poll_index + 1) % len; + return Poll::Ready(Some(Err(error))); + }, + Poll::Ready(Ok((stream, address))) => { + self.poll_index = (self.poll_index + 1) % len; + return Poll::Ready(Some(Ok((stream, address)))); + }, + } + } + + self.poll_index = (self.poll_index + 1) % len; + Poll::Pending + } } #[cfg(test)] mod tests { - use super::*; - use futures::StreamExt; - - #[test] - fn parse_multiaddresses_tcp() { - assert!(multiaddr_to_socket_address( - &"/ip6/::1/tcp/8888".parse().expect("valid multiaddress"), - SocketListenerType::Tcp, - ) - .is_ok()); - assert!(multiaddr_to_socket_address( - &"/ip4/127.0.0.1/tcp/8888".parse().expect("valid multiaddress"), - SocketListenerType::Tcp, - ) - .is_ok()); - assert!(multiaddr_to_socket_address( - &"/ip6/::1/tcp/8888/p2p/12D3KooWT2ouvz5uMmCvHJGzAGRHiqDts5hzXR7NdoQ27pGdzp9Q" - .parse() - .expect("valid multiaddress"), - SocketListenerType::Tcp, - ) - .is_ok()); - assert!(multiaddr_to_socket_address( - &"/ip4/127.0.0.1/tcp/8888/p2p/12D3KooWT2ouvz5uMmCvHJGzAGRHiqDts5hzXR7NdoQ27pGdzp9Q" - .parse() - .expect("valid multiaddress"), - SocketListenerType::Tcp, - ) - .is_ok()); - assert!(multiaddr_to_socket_address( - &"/ip6/::1/udp/8888/p2p/12D3KooWT2ouvz5uMmCvHJGzAGRHiqDts5hzXR7NdoQ27pGdzp9Q" - .parse() - .expect("valid multiaddress"), - SocketListenerType::Tcp, - ) - .is_err()); - assert!(multiaddr_to_socket_address( - &"/ip4/127.0.0.1/udp/8888/p2p/12D3KooWT2ouvz5uMmCvHJGzAGRHiqDts5hzXR7NdoQ27pGdzp9Q" - .parse() - .expect("valid multiaddress"), - SocketListenerType::Tcp, - ) - .is_err()); - } - - #[cfg(feature = "websocket")] - #[test] - fn parse_multiaddresses_websocket() { - assert!(multiaddr_to_socket_address( - &"/ip6/::1/tcp/8888/ws".parse().expect("valid multiaddress"), - SocketListenerType::WebSocket, - ) - .is_ok()); - assert!(multiaddr_to_socket_address( - &"/ip4/127.0.0.1/tcp/8888/ws".parse().expect("valid multiaddress"), - SocketListenerType::WebSocket, - ) - .is_ok()); - assert!(multiaddr_to_socket_address( - &"/ip6/::1/tcp/8888/ws/p2p/12D3KooWT2ouvz5uMmCvHJGzAGRHiqDts5hzXR7NdoQ27pGdzp9Q" - .parse() - .expect("valid multiaddress"), - SocketListenerType::WebSocket, - ) - .is_ok()); - assert!(multiaddr_to_socket_address( - &"/ip4/127.0.0.1/tcp/8888/ws/p2p/12D3KooWT2ouvz5uMmCvHJGzAGRHiqDts5hzXR7NdoQ27pGdzp9Q" - .parse() - .expect("valid multiaddress"), - SocketListenerType::WebSocket, - ) - .is_ok()); - assert!(multiaddr_to_socket_address( - &"/ip6/::1/udp/8888/p2p/12D3KooWT2ouvz5uMmCvHJGzAGRHiqDts5hzXR7NdoQ27pGdzp9Q" - .parse() - .expect("valid multiaddress"), - SocketListenerType::WebSocket, - ) - .is_err()); - assert!(multiaddr_to_socket_address( - &"/ip4/127.0.0.1/udp/8888/p2p/12D3KooWT2ouvz5uMmCvHJGzAGRHiqDts5hzXR7NdoQ27pGdzp9Q" - .parse() - .expect("valid multiaddress"), - SocketListenerType::WebSocket, - ) - .is_err()); - assert!(multiaddr_to_socket_address( - &"/ip4/127.0.0.1/tcp/8888/ws/utp".parse().expect("valid multiaddress"), - SocketListenerType::WebSocket, - ) - .is_err()); - assert!(multiaddr_to_socket_address( - &"/ip6/::1/tcp/8888/p2p/12D3KooWT2ouvz5uMmCvHJGzAGRHiqDts5hzXR7NdoQ27pGdzp9Q" - .parse() - .expect("valid multiaddress"), - SocketListenerType::WebSocket, - ) - .is_err()); - assert!(multiaddr_to_socket_address( - &"/p2p/12D3KooWT2ouvz5uMmCvHJGzAGRHiqDts5hzXR7NdoQ27pGdzp9Q" - .parse() - .expect("valid multiaddress"), - SocketListenerType::WebSocket, - ) - .is_err()); - assert!(multiaddr_to_socket_address( - &"/dns/hello.world/tcp/8888/p2p/12D3KooWT2ouvz5uMmCvHJGzAGRHiqDts5hzXR7NdoQ27pGdzp9Q" - .parse() - .expect("valid multiaddress"), - SocketListenerType::WebSocket, - ) - .is_err()); - assert!(multiaddr_to_socket_address( + use super::*; + use futures::StreamExt; + + #[test] + fn parse_multiaddresses_tcp() { + assert!(multiaddr_to_socket_address( + &"/ip6/::1/tcp/8888".parse().expect("valid multiaddress"), + SocketListenerType::Tcp, + ) + .is_ok()); + assert!(multiaddr_to_socket_address( + &"/ip4/127.0.0.1/tcp/8888".parse().expect("valid multiaddress"), + SocketListenerType::Tcp, + ) + .is_ok()); + assert!(multiaddr_to_socket_address( + &"/ip6/::1/tcp/8888/p2p/12D3KooWT2ouvz5uMmCvHJGzAGRHiqDts5hzXR7NdoQ27pGdzp9Q" + .parse() + .expect("valid multiaddress"), + SocketListenerType::Tcp, + ) + .is_ok()); + assert!(multiaddr_to_socket_address( + &"/ip4/127.0.0.1/tcp/8888/p2p/12D3KooWT2ouvz5uMmCvHJGzAGRHiqDts5hzXR7NdoQ27pGdzp9Q" + .parse() + .expect("valid multiaddress"), + SocketListenerType::Tcp, + ) + .is_ok()); + assert!(multiaddr_to_socket_address( + &"/ip6/::1/udp/8888/p2p/12D3KooWT2ouvz5uMmCvHJGzAGRHiqDts5hzXR7NdoQ27pGdzp9Q" + .parse() + .expect("valid multiaddress"), + SocketListenerType::Tcp, + ) + .is_err()); + assert!(multiaddr_to_socket_address( + &"/ip4/127.0.0.1/udp/8888/p2p/12D3KooWT2ouvz5uMmCvHJGzAGRHiqDts5hzXR7NdoQ27pGdzp9Q" + .parse() + .expect("valid multiaddress"), + SocketListenerType::Tcp, + ) + .is_err()); + } + + #[cfg(feature = "websocket")] + #[test] + fn parse_multiaddresses_websocket() { + assert!(multiaddr_to_socket_address( + &"/ip6/::1/tcp/8888/ws".parse().expect("valid multiaddress"), + SocketListenerType::WebSocket, + ) + .is_ok()); + assert!(multiaddr_to_socket_address( + &"/ip4/127.0.0.1/tcp/8888/ws".parse().expect("valid multiaddress"), + SocketListenerType::WebSocket, + ) + .is_ok()); + assert!(multiaddr_to_socket_address( + &"/ip6/::1/tcp/8888/ws/p2p/12D3KooWT2ouvz5uMmCvHJGzAGRHiqDts5hzXR7NdoQ27pGdzp9Q" + .parse() + .expect("valid multiaddress"), + SocketListenerType::WebSocket, + ) + .is_ok()); + assert!(multiaddr_to_socket_address( + &"/ip4/127.0.0.1/tcp/8888/ws/p2p/12D3KooWT2ouvz5uMmCvHJGzAGRHiqDts5hzXR7NdoQ27pGdzp9Q" + .parse() + .expect("valid multiaddress"), + SocketListenerType::WebSocket, + ) + .is_ok()); + assert!(multiaddr_to_socket_address( + &"/ip6/::1/udp/8888/p2p/12D3KooWT2ouvz5uMmCvHJGzAGRHiqDts5hzXR7NdoQ27pGdzp9Q" + .parse() + .expect("valid multiaddress"), + SocketListenerType::WebSocket, + ) + .is_err()); + assert!(multiaddr_to_socket_address( + &"/ip4/127.0.0.1/udp/8888/p2p/12D3KooWT2ouvz5uMmCvHJGzAGRHiqDts5hzXR7NdoQ27pGdzp9Q" + .parse() + .expect("valid multiaddress"), + SocketListenerType::WebSocket, + ) + .is_err()); + assert!(multiaddr_to_socket_address( + &"/ip4/127.0.0.1/tcp/8888/ws/utp".parse().expect("valid multiaddress"), + SocketListenerType::WebSocket, + ) + .is_err()); + assert!(multiaddr_to_socket_address( + &"/ip6/::1/tcp/8888/p2p/12D3KooWT2ouvz5uMmCvHJGzAGRHiqDts5hzXR7NdoQ27pGdzp9Q" + .parse() + .expect("valid multiaddress"), + SocketListenerType::WebSocket, + ) + .is_err()); + assert!(multiaddr_to_socket_address( + &"/p2p/12D3KooWT2ouvz5uMmCvHJGzAGRHiqDts5hzXR7NdoQ27pGdzp9Q" + .parse() + .expect("valid multiaddress"), + SocketListenerType::WebSocket, + ) + .is_err()); + assert!(multiaddr_to_socket_address( + &"/dns/hello.world/tcp/8888/p2p/12D3KooWT2ouvz5uMmCvHJGzAGRHiqDts5hzXR7NdoQ27pGdzp9Q" + .parse() + .expect("valid multiaddress"), + SocketListenerType::WebSocket, + ) + .is_err()); + assert!(multiaddr_to_socket_address( &"/dns6/hello.world/tcp/8888/ws/p2p/12D3KooWT2ouvz5uMmCvHJGzAGRHiqDts5hzXR7NdoQ27pGdzp9Q" .parse() .expect("valid multiaddress") ,SocketListenerType::WebSocket, ) .is_ok()); - assert!(multiaddr_to_socket_address( + assert!(multiaddr_to_socket_address( &"/dns4/hello.world/tcp/8888/ws/p2p/12D3KooWT2ouvz5uMmCvHJGzAGRHiqDts5hzXR7NdoQ27pGdzp9Q" .parse() .expect("valid multiaddress"), SocketListenerType::WebSocket, ) .is_ok()); - assert!(multiaddr_to_socket_address( + assert!(multiaddr_to_socket_address( &"/dns6/hello.world/tcp/8888/ws/p2p/12D3KooWT2ouvz5uMmCvHJGzAGRHiqDts5hzXR7NdoQ27pGdzp9Q" .parse() .expect("valid multiaddress"), SocketListenerType::WebSocket, ) .is_ok()); - } - - #[tokio::test] - async fn no_listeners_tcp() { - let (mut listener, _, _) = SocketListener::new::(Vec::new(), true, false); - - futures::future::poll_fn(|cx| match listener.poll_next_unpin(cx) { - Poll::Pending => Poll::Ready(()), - event => panic!("unexpected event: {event:?}"), - }) - .await; - } - - #[cfg(feature = "websocket")] - #[tokio::test] - async fn no_listeners_websocket() { - let (mut listener, _, _) = SocketListener::new::(Vec::new(), true, false); - - futures::future::poll_fn(|cx| match listener.poll_next_unpin(cx) { - Poll::Pending => Poll::Ready(()), - event => panic!("unexpected event: {event:?}"), - }) - .await; - } - - #[tokio::test] - async fn one_listener_tcp() { - let address: Multiaddr = "/ip6/::1/tcp/0".parse().unwrap(); - let (mut listener, listen_addresses, _) = - SocketListener::new::(vec![address.clone()], true, false); - - let Some(Protocol::Tcp(port)) = listen_addresses.first().unwrap().clone().iter().nth(1) - else { - panic!("invalid address"); - }; - - let (res1, res2) = - tokio::join!(listener.next(), TcpStream::connect(format!("[::1]:{port}"))); - - assert!(res1.unwrap().is_ok() && res2.is_ok()); - } - - #[cfg(feature = "websocket")] - #[tokio::test] - async fn one_listener_websocket() { - let address: Multiaddr = "/ip6/::1/tcp/0/ws".parse().unwrap(); - let (mut listener, listen_addresses, _) = - SocketListener::new::(vec![address.clone()], true, false); - let Some(Protocol::Tcp(port)) = listen_addresses.first().unwrap().clone().iter().nth(1) - else { - panic!("invalid address"); - }; - - let (res1, res2) = - tokio::join!(listener.next(), TcpStream::connect(format!("[::1]:{port}"))); - - assert!(res1.unwrap().is_ok() && res2.is_ok()); - } - - #[tokio::test] - async fn two_listeners_tcp() { - let address1: Multiaddr = "/ip6/::1/tcp/0".parse().unwrap(); - let address2: Multiaddr = "/ip4/127.0.0.1/tcp/0".parse().unwrap(); - let (mut listener, listen_addresses, _) = - SocketListener::new::(vec![address1, address2], true, false); - let Some(Protocol::Tcp(port1)) = listen_addresses.first().unwrap().clone().iter().nth(1) - else { - panic!("invalid address"); - }; - - let Some(Protocol::Tcp(port2)) = - listen_addresses.iter().nth(1).unwrap().clone().iter().nth(1) - else { - panic!("invalid address"); - }; - - tokio::spawn(async move { while let Some(_) = listener.next().await {} }); - - let (res1, res2) = tokio::join!( - TcpStream::connect(format!("[::1]:{port1}")), - TcpStream::connect(format!("127.0.0.1:{port2}")) - ); - - assert!(res1.is_ok() && res2.is_ok()); - } - - #[cfg(feature = "websocket")] - #[tokio::test] - async fn two_listeners_websocket() { - let address1: Multiaddr = "/ip6/::1/tcp/0/ws".parse().unwrap(); - let address2: Multiaddr = "/ip4/127.0.0.1/tcp/0/ws".parse().unwrap(); - let (mut listener, listen_addresses, _) = - SocketListener::new::(vec![address1, address2], true, false); - - let Some(Protocol::Tcp(port1)) = listen_addresses.first().unwrap().clone().iter().nth(1) - else { - panic!("invalid address"); - }; - - let Some(Protocol::Tcp(port2)) = - listen_addresses.iter().nth(1).unwrap().clone().iter().nth(1) - else { - panic!("invalid address"); - }; - - tokio::spawn(async move { while let Some(_) = listener.next().await {} }); - - let (res1, res2) = tokio::join!( - TcpStream::connect(format!("[::1]:{port1}")), - TcpStream::connect(format!("127.0.0.1:{port2}")) - ); - - assert!(res1.is_ok() && res2.is_ok()); - } - - #[tokio::test] - async fn local_dial_address() { - let dial_addresses = DialAddresses::Reuse { - listen_addresses: Arc::new(vec![ - "[2001:7d0:84aa:3900:2a5d:9e85::]:8888".parse().unwrap(), - "92.168.127.1:9999".parse().unwrap(), - ]), - }; - - assert_eq!( - dial_addresses.local_dial_address(&IpAddr::V4(Ipv4Addr::new(192, 168, 0, 1))), - Ok(Some(SocketAddr::new( - IpAddr::V4(Ipv4Addr::UNSPECIFIED), - 9999 - ))), - ); - - assert_eq!( - dial_addresses.local_dial_address(&IpAddr::V6(Ipv6Addr::new(0, 1, 2, 3, 4, 5, 6, 7))), - Ok(Some(SocketAddr::new( - IpAddr::V6(Ipv6Addr::UNSPECIFIED), - 8888 - ))), - ); - } + } + + #[tokio::test] + async fn no_listeners_tcp() { + let (mut listener, _, _) = SocketListener::new::(Vec::new(), true, false); + + futures::future::poll_fn(|cx| match listener.poll_next_unpin(cx) { + Poll::Pending => Poll::Ready(()), + event => panic!("unexpected event: {event:?}"), + }) + .await; + } + + #[cfg(feature = "websocket")] + #[tokio::test] + async fn no_listeners_websocket() { + let (mut listener, _, _) = SocketListener::new::(Vec::new(), true, false); + + futures::future::poll_fn(|cx| match listener.poll_next_unpin(cx) { + Poll::Pending => Poll::Ready(()), + event => panic!("unexpected event: {event:?}"), + }) + .await; + } + + #[tokio::test] + async fn one_listener_tcp() { + let address: Multiaddr = "/ip6/::1/tcp/0".parse().unwrap(); + let (mut listener, listen_addresses, _) = + SocketListener::new::(vec![address.clone()], true, false); + + let Some(Protocol::Tcp(port)) = listen_addresses.first().unwrap().clone().iter().nth(1) + else { + panic!("invalid address"); + }; + + let (res1, res2) = + tokio::join!(listener.next(), TcpStream::connect(format!("[::1]:{port}"))); + + assert!(res1.unwrap().is_ok() && res2.is_ok()); + } + + #[cfg(feature = "websocket")] + #[tokio::test] + async fn one_listener_websocket() { + let address: Multiaddr = "/ip6/::1/tcp/0/ws".parse().unwrap(); + let (mut listener, listen_addresses, _) = + SocketListener::new::(vec![address.clone()], true, false); + let Some(Protocol::Tcp(port)) = listen_addresses.first().unwrap().clone().iter().nth(1) + else { + panic!("invalid address"); + }; + + let (res1, res2) = + tokio::join!(listener.next(), TcpStream::connect(format!("[::1]:{port}"))); + + assert!(res1.unwrap().is_ok() && res2.is_ok()); + } + + #[tokio::test] + async fn two_listeners_tcp() { + let address1: Multiaddr = "/ip6/::1/tcp/0".parse().unwrap(); + let address2: Multiaddr = "/ip4/127.0.0.1/tcp/0".parse().unwrap(); + let (mut listener, listen_addresses, _) = + SocketListener::new::(vec![address1, address2], true, false); + let Some(Protocol::Tcp(port1)) = listen_addresses.first().unwrap().clone().iter().nth(1) + else { + panic!("invalid address"); + }; + + let Some(Protocol::Tcp(port2)) = + listen_addresses.iter().nth(1).unwrap().clone().iter().nth(1) + else { + panic!("invalid address"); + }; + + tokio::spawn(async move { while let Some(_) = listener.next().await {} }); + + let (res1, res2) = tokio::join!( + TcpStream::connect(format!("[::1]:{port1}")), + TcpStream::connect(format!("127.0.0.1:{port2}")) + ); + + assert!(res1.is_ok() && res2.is_ok()); + } + + #[cfg(feature = "websocket")] + #[tokio::test] + async fn two_listeners_websocket() { + let address1: Multiaddr = "/ip6/::1/tcp/0/ws".parse().unwrap(); + let address2: Multiaddr = "/ip4/127.0.0.1/tcp/0/ws".parse().unwrap(); + let (mut listener, listen_addresses, _) = + SocketListener::new::(vec![address1, address2], true, false); + + let Some(Protocol::Tcp(port1)) = listen_addresses.first().unwrap().clone().iter().nth(1) + else { + panic!("invalid address"); + }; + + let Some(Protocol::Tcp(port2)) = + listen_addresses.iter().nth(1).unwrap().clone().iter().nth(1) + else { + panic!("invalid address"); + }; + + tokio::spawn(async move { while let Some(_) = listener.next().await {} }); + + let (res1, res2) = tokio::join!( + TcpStream::connect(format!("[::1]:{port1}")), + TcpStream::connect(format!("127.0.0.1:{port2}")) + ); + + assert!(res1.is_ok() && res2.is_ok()); + } + + #[tokio::test] + async fn local_dial_address() { + let dial_addresses = DialAddresses::Reuse { + listen_addresses: Arc::new(vec![ + "[2001:7d0:84aa:3900:2a5d:9e85::]:8888".parse().unwrap(), + "92.168.127.1:9999".parse().unwrap(), + ]), + }; + + assert_eq!( + dial_addresses.local_dial_address(&IpAddr::V4(Ipv4Addr::new(192, 168, 0, 1))), + Ok(Some(SocketAddr::new(IpAddr::V4(Ipv4Addr::UNSPECIFIED), 9999))), + ); + + assert_eq!( + dial_addresses.local_dial_address(&IpAddr::V6(Ipv6Addr::new(0, 1, 2, 3, 4, 5, 6, 7))), + Ok(Some(SocketAddr::new(IpAddr::V6(Ipv6Addr::UNSPECIFIED), 8888))), + ); + } } diff --git a/client/litep2p/src/transport/dummy.rs b/client/litep2p/src/transport/dummy.rs index 95095344..4c611b22 100644 --- a/client/litep2p/src/transport/dummy.rs +++ b/client/litep2p/src/transport/dummy.rs @@ -21,145 +21,139 @@ //! Dummy transport. use crate::{ - transport::{Transport, TransportEvent}, - types::ConnectionId, + transport::{Transport, TransportEvent}, + types::ConnectionId, }; use futures::{future::BoxFuture, Stream}; use multiaddr::Multiaddr; use std::{ - collections::VecDeque, - pin::Pin, - task::{Context, Poll}, + collections::VecDeque, + pin::Pin, + task::{Context, Poll}, }; /// Dummy transport. pub(crate) struct DummyTransport { - /// Events. - events: VecDeque, + /// Events. + events: VecDeque, } impl DummyTransport { - /// Create new [`DummyTransport`]. - pub(crate) fn new() -> Self { - Self { - events: VecDeque::new(), - } - } - - /// Inject event into `DummyTransport`. - pub(crate) fn inject_event(&mut self, event: TransportEvent) { - self.events.push_back(event); - } + /// Create new [`DummyTransport`]. + pub(crate) fn new() -> Self { + Self { events: VecDeque::new() } + } + + /// Inject event into `DummyTransport`. + pub(crate) fn inject_event(&mut self, event: TransportEvent) { + self.events.push_back(event); + } } impl Stream for DummyTransport { - type Item = TransportEvent; + type Item = TransportEvent; - fn poll_next(mut self: Pin<&mut Self>, _: &mut Context<'_>) -> Poll> { - if self.events.is_empty() { - return Poll::Pending; - } + fn poll_next(mut self: Pin<&mut Self>, _: &mut Context<'_>) -> Poll> { + if self.events.is_empty() { + return Poll::Pending; + } - Poll::Ready(self.events.pop_front()) - } + Poll::Ready(self.events.pop_front()) + } } impl Transport for DummyTransport { - fn dial(&mut self, _: ConnectionId, _: Multiaddr) -> crate::Result<()> { - Ok(()) - } + fn dial(&mut self, _: ConnectionId, _: Multiaddr) -> crate::Result<()> { + Ok(()) + } - fn accept(&mut self, _: ConnectionId) -> crate::Result>> { - Ok(Box::pin(async { Ok(()) })) - } + fn accept(&mut self, _: ConnectionId) -> crate::Result>> { + Ok(Box::pin(async { Ok(()) })) + } - fn accept_pending(&mut self, _connection_id: ConnectionId) -> crate::Result<()> { - Ok(()) - } + fn accept_pending(&mut self, _connection_id: ConnectionId) -> crate::Result<()> { + Ok(()) + } - fn reject_pending(&mut self, _connection_id: ConnectionId) -> crate::Result<()> { - Ok(()) - } + fn reject_pending(&mut self, _connection_id: ConnectionId) -> crate::Result<()> { + Ok(()) + } - fn reject(&mut self, _: ConnectionId) -> crate::Result<()> { - Ok(()) - } + fn reject(&mut self, _: ConnectionId) -> crate::Result<()> { + Ok(()) + } - fn open(&mut self, _: ConnectionId, _: Vec) -> crate::Result<()> { - Ok(()) - } + fn open(&mut self, _: ConnectionId, _: Vec) -> crate::Result<()> { + Ok(()) + } - fn negotiate(&mut self, _: ConnectionId) -> crate::Result<()> { - Ok(()) - } + fn negotiate(&mut self, _: ConnectionId) -> crate::Result<()> { + Ok(()) + } - /// Cancel opening connections. - fn cancel(&mut self, _: ConnectionId) {} + /// Cancel opening connections. + fn cancel(&mut self, _: ConnectionId) {} } #[cfg(test)] mod tests { - use super::*; - use crate::{error::DialError, transport::Endpoint, PeerId}; - use futures::StreamExt; - - #[tokio::test] - async fn pending_event() { - let mut transport = DummyTransport::new(); - - transport.inject_event(TransportEvent::DialFailure { - connection_id: ConnectionId::from(1338usize), - address: Multiaddr::empty(), - error: DialError::Timeout, - }); - - let peer = PeerId::random(); - let endpoint = Endpoint::listener(Multiaddr::empty(), ConnectionId::from(1337usize)); - - transport.inject_event(TransportEvent::ConnectionEstablished { - peer, - endpoint: endpoint.clone(), - }); - - match transport.next().await.unwrap() { - TransportEvent::DialFailure { - connection_id, - address, - .. - } => { - assert_eq!(connection_id, ConnectionId::from(1338usize)); - assert_eq!(address, Multiaddr::empty()); - } - _ => panic!("invalid event"), - } - - match transport.next().await.unwrap() { - TransportEvent::ConnectionEstablished { - peer: event_peer, - endpoint: event_endpoint, - } => { - assert_eq!(peer, event_peer); - assert_eq!(endpoint, event_endpoint); - } - _ => panic!("invalid event"), - } - - futures::future::poll_fn(|cx| match transport.poll_next_unpin(cx) { - Poll::Pending => Poll::Ready(()), - _ => panic!("invalid event"), - }) - .await; - } - - #[test] - fn dummy_handle_connection_states() { - let mut transport = DummyTransport::new(); - - assert!(transport.reject(ConnectionId::new()).is_ok()); - assert!(transport.open(ConnectionId::new(), Vec::new()).is_ok()); - assert!(transport.negotiate(ConnectionId::new()).is_ok()); - transport.cancel(ConnectionId::new()); - } + use super::*; + use crate::{error::DialError, transport::Endpoint, PeerId}; + use futures::StreamExt; + + #[tokio::test] + async fn pending_event() { + let mut transport = DummyTransport::new(); + + transport.inject_event(TransportEvent::DialFailure { + connection_id: ConnectionId::from(1338usize), + address: Multiaddr::empty(), + error: DialError::Timeout, + }); + + let peer = PeerId::random(); + let endpoint = Endpoint::listener(Multiaddr::empty(), ConnectionId::from(1337usize)); + + transport.inject_event(TransportEvent::ConnectionEstablished { + peer, + endpoint: endpoint.clone(), + }); + + match transport.next().await.unwrap() { + TransportEvent::DialFailure { connection_id, address, .. } => { + assert_eq!(connection_id, ConnectionId::from(1338usize)); + assert_eq!(address, Multiaddr::empty()); + }, + _ => panic!("invalid event"), + } + + match transport.next().await.unwrap() { + TransportEvent::ConnectionEstablished { + peer: event_peer, + endpoint: event_endpoint, + } => { + assert_eq!(peer, event_peer); + assert_eq!(endpoint, event_endpoint); + }, + _ => panic!("invalid event"), + } + + futures::future::poll_fn(|cx| match transport.poll_next_unpin(cx) { + Poll::Pending => Poll::Ready(()), + _ => panic!("invalid event"), + }) + .await; + } + + #[test] + fn dummy_handle_connection_states() { + let mut transport = DummyTransport::new(); + + assert!(transport.reject(ConnectionId::new()).is_ok()); + assert!(transport.open(ConnectionId::new(), Vec::new()).is_ok()); + assert!(transport.negotiate(ConnectionId::new()).is_ok()); + transport.cancel(ConnectionId::new()); + } } diff --git a/client/litep2p/src/transport/manager/address.rs b/client/litep2p/src/transport/manager/address.rs index a812a4f4..eb32fd84 100644 --- a/client/litep2p/src/transport/manager/address.rs +++ b/client/litep2p/src/transport/manager/address.rs @@ -31,621 +31,599 @@ const MAX_ADDRESSES: usize = 64; /// Scores for address records. pub mod scores { - /// Score indicating that the connection was successfully established. - pub const CONNECTION_ESTABLISHED: i32 = 100i32; - - /// Score for failing to connect due to an invalid or unreachable address. - pub const CONNECTION_FAILURE: i32 = -100i32; - - /// Score for providing an invalid address. - /// - /// This address can never be reached and is effectively banned. - pub const ADDRESS_FAILURE: i32 = i32::MIN; - - /// Initial score for public/global addresses. - /// - /// This gives public addresses a slight priority over private addresses - /// when all addresses are untested (private addresses start at 0). - pub const PUBLIC_ADDRESS_BONUS: i32 = 1i32; + /// Score indicating that the connection was successfully established. + pub const CONNECTION_ESTABLISHED: i32 = 100i32; + + /// Score for failing to connect due to an invalid or unreachable address. + pub const CONNECTION_FAILURE: i32 = -100i32; + + /// Score for providing an invalid address. + /// + /// This address can never be reached and is effectively banned. + pub const ADDRESS_FAILURE: i32 = i32::MIN; + + /// Initial score for public/global addresses. + /// + /// This gives public addresses a slight priority over private addresses + /// when all addresses are untested (private addresses start at 0). + pub const PUBLIC_ADDRESS_BONUS: i32 = 1i32; } #[allow(clippy::derived_hash_with_manual_eq)] #[derive(Debug, Clone, Hash)] pub struct AddressRecord { - /// Address score. - score: i32, + /// Address score. + score: i32, - /// Address. - address: Multiaddr, + /// Address. + address: Multiaddr, } impl AsRef for AddressRecord { - fn as_ref(&self) -> &Multiaddr { - &self.address - } + fn as_ref(&self) -> &Multiaddr { + &self.address + } } impl AddressRecord { - /// Create new `AddressRecord` and if `address` doesn't contain `P2p`, - /// append the provided `PeerId` to the address. - pub fn new(peer: &PeerId, address: Multiaddr, score: i32) -> Self { - let address = if !std::matches!(address.iter().last(), Some(Protocol::P2p(_))) { - address.with(Protocol::P2p( - Multihash::from_bytes(&peer.to_bytes()).expect("valid peer id"), - )) - } else { - address - }; - - Self::from_raw_multiaddr_with_score(address, score) - } - - /// Create `AddressRecord` from `Multiaddr`. - /// - /// If `address` doesn't contain `PeerId`, return `None` to indicate that this - /// an invalid `Multiaddr` from the perspective of the `TransportManager`. - pub fn from_multiaddr(address: Multiaddr) -> Option { - if !std::matches!(address.iter().last(), Some(Protocol::P2p(_))) { - return None; - } - - Some(Self::from_raw_multiaddr_with_score(address, 0)) - } - - /// Create `AddressRecord` from `Multiaddr`. - /// - /// This method does not check if the address contains `PeerId`. - /// - /// Please consider using [`Self::from_multiaddr`] from the transport manager code. - pub fn from_raw_multiaddr(address: Multiaddr) -> AddressRecord { - Self::from_raw_multiaddr_with_score(address, 0) - } - - /// Create `AddressRecord` from `Multiaddr`. - /// - /// This method does not check if the address contains `PeerId`. - /// - /// Please consider using [`Self::from_multiaddr`] from the transport manager code. - pub fn from_raw_multiaddr_with_score(address: Multiaddr, score: i32) -> AddressRecord { - Self { address, score } - } - - /// Get address score. - #[cfg(test)] - pub fn score(&self) -> i32 { - self.score - } - - /// Get address. - pub fn address(&self) -> &Multiaddr { - &self.address - } - - /// Update score of an address. - pub fn update_score(&mut self, score: i32) { - self.score = score; - } + /// Create new `AddressRecord` and if `address` doesn't contain `P2p`, + /// append the provided `PeerId` to the address. + pub fn new(peer: &PeerId, address: Multiaddr, score: i32) -> Self { + let address = if !std::matches!(address.iter().last(), Some(Protocol::P2p(_))) { + address.with(Protocol::P2p( + Multihash::from_bytes(&peer.to_bytes()).expect("valid peer id"), + )) + } else { + address + }; + + Self::from_raw_multiaddr_with_score(address, score) + } + + /// Create `AddressRecord` from `Multiaddr`. + /// + /// If `address` doesn't contain `PeerId`, return `None` to indicate that this + /// an invalid `Multiaddr` from the perspective of the `TransportManager`. + pub fn from_multiaddr(address: Multiaddr) -> Option { + if !std::matches!(address.iter().last(), Some(Protocol::P2p(_))) { + return None; + } + + Some(Self::from_raw_multiaddr_with_score(address, 0)) + } + + /// Create `AddressRecord` from `Multiaddr`. + /// + /// This method does not check if the address contains `PeerId`. + /// + /// Please consider using [`Self::from_multiaddr`] from the transport manager code. + pub fn from_raw_multiaddr(address: Multiaddr) -> AddressRecord { + Self::from_raw_multiaddr_with_score(address, 0) + } + + /// Create `AddressRecord` from `Multiaddr`. + /// + /// This method does not check if the address contains `PeerId`. + /// + /// Please consider using [`Self::from_multiaddr`] from the transport manager code. + pub fn from_raw_multiaddr_with_score(address: Multiaddr, score: i32) -> AddressRecord { + Self { address, score } + } + + /// Get address score. + #[cfg(test)] + pub fn score(&self) -> i32 { + self.score + } + + /// Get address. + pub fn address(&self) -> &Multiaddr { + &self.address + } + + /// Update score of an address. + pub fn update_score(&mut self, score: i32) { + self.score = score; + } } /// Check if a multiaddr represents a global/public address. /// /// DNS addresses are considered potentially public. fn is_global_multiaddr(address: &Multiaddr) -> bool { - for protocol in address.iter() { - match protocol { - Protocol::Ip4(ip) => return IpNetwork::from(ip).is_global(), - Protocol::Ip6(ip) => return IpNetwork::from(ip).is_global(), - // DNS addresses could resolve to public IPs, treat as potentially public. - // Ideally we need to resolve DNS to check the actual IPs. However, this - // is a more complex operation that requires async DNS resolution in the - // transport manager context / transport layer. - Protocol::Dns(_) | Protocol::Dns4(_) | Protocol::Dns6(_) => return true, - _ => continue, - } - } - - // Consider the address as non-global if no IP or DNS component is found - false + for protocol in address.iter() { + match protocol { + Protocol::Ip4(ip) => return IpNetwork::from(ip).is_global(), + Protocol::Ip6(ip) => return IpNetwork::from(ip).is_global(), + // DNS addresses could resolve to public IPs, treat as potentially public. + // Ideally we need to resolve DNS to check the actual IPs. However, this + // is a more complex operation that requires async DNS resolution in the + // transport manager context / transport layer. + Protocol::Dns(_) | Protocol::Dns4(_) | Protocol::Dns6(_) => return true, + _ => continue, + } + } + + // Consider the address as non-global if no IP or DNS component is found + false } impl PartialEq for AddressRecord { - fn eq(&self, other: &Self) -> bool { - self.score.eq(&other.score) - } + fn eq(&self, other: &Self) -> bool { + self.score.eq(&other.score) + } } impl Eq for AddressRecord {} impl PartialOrd for AddressRecord { - fn partial_cmp(&self, other: &Self) -> Option { - Some(self.cmp(other)) - } + fn partial_cmp(&self, other: &Self) -> Option { + Some(self.cmp(other)) + } } impl Ord for AddressRecord { - fn cmp(&self, other: &Self) -> std::cmp::Ordering { - self.score.cmp(&other.score) - } + fn cmp(&self, other: &Self) -> std::cmp::Ordering { + self.score.cmp(&other.score) + } } /// Store for peer addresses. #[derive(Debug, Clone, Default)] pub struct AddressStore { - /// Addresses available. - pub addresses: HashMap, - /// Maximum capacity of the address store. - max_capacity: usize, + /// Addresses available. + pub addresses: HashMap, + /// Maximum capacity of the address store. + max_capacity: usize, } impl FromIterator for AddressStore { - fn from_iter>(iter: T) -> Self { - let mut store = AddressStore::new(); - for address in iter { - if let Some(record) = AddressRecord::from_multiaddr(address) { - store.insert(record); - } - } - - store - } + fn from_iter>(iter: T) -> Self { + let mut store = AddressStore::new(); + for address in iter { + if let Some(record) = AddressRecord::from_multiaddr(address) { + store.insert(record); + } + } + + store + } } impl FromIterator for AddressStore { - fn from_iter>(iter: T) -> Self { - let mut store = AddressStore::new(); - for record in iter { - store.insert(record); - } - - store - } + fn from_iter>(iter: T) -> Self { + let mut store = AddressStore::new(); + for record in iter { + store.insert(record); + } + + store + } } impl Extend for AddressStore { - fn extend>(&mut self, iter: T) { - for record in iter { - self.insert(record) - } - } + fn extend>(&mut self, iter: T) { + for record in iter { + self.insert(record) + } + } } impl<'a> Extend<&'a AddressRecord> for AddressStore { - fn extend>(&mut self, iter: T) { - for record in iter { - self.insert(record.clone()) - } - } + fn extend>(&mut self, iter: T) { + for record in iter { + self.insert(record.clone()) + } + } } impl AddressStore { - /// Create new [`AddressStore`]. - pub fn new() -> Self { - Self { - addresses: HashMap::with_capacity(MAX_ADDRESSES), - max_capacity: MAX_ADDRESSES, - } - } - - /// Get the score for a given error. - pub fn error_score(error: &DialError) -> i32 { - match error { - DialError::AddressError(_) => scores::ADDRESS_FAILURE, - _ => scores::CONNECTION_FAILURE, - } - } - - /// Check if [`AddressStore`] is empty. - pub fn is_empty(&self) -> bool { - self.addresses.is_empty() - } - - /// Insert the address record into [`AddressStore`] with the provided score. - /// - /// If the address is not in the store, it will be inserted with a bonus for public addresses. - /// Otherwise, the score will be updated only for connection events (non-zero scores), - /// not for re-adding the same address which should not overwrite connection history. - pub fn insert(&mut self, record: AddressRecord) { - if let Entry::Occupied(mut occupied) = self.addresses.entry(record.address.clone()) { - // Only update score for connection events (non-zero scores). - // Re-adding an address (score 0) via rediscovery should not wipe out - // connection success/failure history. - if record.score != 0 { - occupied.get_mut().update_score(record.score); - } - return; - } - - // Reward public addresses with a bonus. - let is_public = is_global_multiaddr(&record.address); - let record = if is_public { - AddressRecord { - score: record.score.saturating_add(scores::PUBLIC_ADDRESS_BONUS), - ..record - } - } else { - record - }; - - // The eviction algorithm favours addresses with higher scores. - // - // This algorithm has the following implications: - // - it keeps the best addresses in the store. - // - if the store is at capacity, the worst address will be evicted. - // - an address that is not dialed yet (with score zero) will be preferred over an address - // that already failed (with negative score). - if self.addresses.len() >= self.max_capacity { - let min_record = self - .addresses - .values() - .min() - .cloned() - .expect("There is at least one element checked above; qed"); - - // The lowest score is better than the new record. - if record.score < min_record.score { - return; - } - self.addresses.remove(min_record.address()); - } - - // Insert the record. - self.addresses.insert(record.address.clone(), record); - } - - /// Return the available addresses sorted by score. - pub fn addresses(&self, limit: usize) -> Vec { - let mut records = self.addresses.values().cloned().collect::>(); - records.sort_by(|lhs, rhs| rhs.score.cmp(&lhs.score)); - records.into_iter().take(limit).map(|record| record.address).collect() - } + /// Create new [`AddressStore`]. + pub fn new() -> Self { + Self { addresses: HashMap::with_capacity(MAX_ADDRESSES), max_capacity: MAX_ADDRESSES } + } + + /// Get the score for a given error. + pub fn error_score(error: &DialError) -> i32 { + match error { + DialError::AddressError(_) => scores::ADDRESS_FAILURE, + _ => scores::CONNECTION_FAILURE, + } + } + + /// Check if [`AddressStore`] is empty. + pub fn is_empty(&self) -> bool { + self.addresses.is_empty() + } + + /// Insert the address record into [`AddressStore`] with the provided score. + /// + /// If the address is not in the store, it will be inserted with a bonus for public addresses. + /// Otherwise, the score will be updated only for connection events (non-zero scores), + /// not for re-adding the same address which should not overwrite connection history. + pub fn insert(&mut self, record: AddressRecord) { + if let Entry::Occupied(mut occupied) = self.addresses.entry(record.address.clone()) { + // Only update score for connection events (non-zero scores). + // Re-adding an address (score 0) via rediscovery should not wipe out + // connection success/failure history. + if record.score != 0 { + occupied.get_mut().update_score(record.score); + } + return; + } + + // Reward public addresses with a bonus. + let is_public = is_global_multiaddr(&record.address); + let record = if is_public { + AddressRecord { + score: record.score.saturating_add(scores::PUBLIC_ADDRESS_BONUS), + ..record + } + } else { + record + }; + + // The eviction algorithm favours addresses with higher scores. + // + // This algorithm has the following implications: + // - it keeps the best addresses in the store. + // - if the store is at capacity, the worst address will be evicted. + // - an address that is not dialed yet (with score zero) will be preferred over an address + // that already failed (with negative score). + if self.addresses.len() >= self.max_capacity { + let min_record = self + .addresses + .values() + .min() + .cloned() + .expect("There is at least one element checked above; qed"); + + // The lowest score is better than the new record. + if record.score < min_record.score { + return; + } + self.addresses.remove(min_record.address()); + } + + // Insert the record. + self.addresses.insert(record.address.clone(), record); + } + + /// Return the available addresses sorted by score. + pub fn addresses(&self, limit: usize) -> Vec { + let mut records = self.addresses.values().cloned().collect::>(); + records.sort_by(|lhs, rhs| rhs.score.cmp(&lhs.score)); + records.into_iter().take(limit).map(|record| record.address).collect() + } } #[cfg(test)] mod tests { - use std::{ - collections::HashMap, - net::{Ipv4Addr, SocketAddrV4}, - }; - - use super::*; - use rand::{rngs::ThreadRng, Rng}; - - fn tcp_address_record(rng: &mut ThreadRng) -> AddressRecord { - let peer = PeerId::random(); - let address = std::net::SocketAddr::V4(SocketAddrV4::new( - Ipv4Addr::new( - 10, - rng.gen_range(0..=255), - rng.gen_range(0..=255), - rng.gen_range(1..=255), - ), - rng.gen_range(1..=65535), - )); - let score: i32 = rng.gen_range(10..=200); - - AddressRecord::new( - &peer, - Multiaddr::empty() - .with(Protocol::from(address.ip())) - .with(Protocol::Tcp(address.port())), - score, - ) - } - - fn ws_address_record(rng: &mut ThreadRng) -> AddressRecord { - let peer = PeerId::random(); - let address = std::net::SocketAddr::V4(SocketAddrV4::new( - Ipv4Addr::new( - 10, - rng.gen_range(0..=255), - rng.gen_range(0..=255), - rng.gen_range(1..=255), - ), - rng.gen_range(1..=65535), - )); - let score: i32 = rng.gen_range(10..=200); - - AddressRecord::new( - &peer, - Multiaddr::empty() - .with(Protocol::from(address.ip())) - .with(Protocol::Tcp(address.port())) - .with(Protocol::Ws(std::borrow::Cow::Owned("/".to_string()))), - score, - ) - } - - fn quic_address_record(rng: &mut ThreadRng) -> AddressRecord { - let peer = PeerId::random(); - let address = std::net::SocketAddr::V4(SocketAddrV4::new( - Ipv4Addr::new( - 10, - rng.gen_range(0..=255), - rng.gen_range(0..=255), - rng.gen_range(1..=255), - ), - rng.gen_range(1..=65535), - )); - let score: i32 = rng.gen_range(10..=200); - - AddressRecord::new( - &peer, - Multiaddr::empty() - .with(Protocol::from(address.ip())) - .with(Protocol::Udp(address.port())) - .with(Protocol::QuicV1), - score, - ) - } - - #[test] - fn take_multiple_records() { - let mut store = AddressStore::new(); - let mut rng = rand::thread_rng(); - - for _ in 0..rng.gen_range(1..5) { - store.insert(tcp_address_record(&mut rng)); - } - for _ in 0..rng.gen_range(1..5) { - store.insert(ws_address_record(&mut rng)); - } - for _ in 0..rng.gen_range(1..5) { - store.insert(quic_address_record(&mut rng)); - } - - let known_addresses = store.addresses.len(); - assert!(known_addresses >= 3); - - let taken = store.addresses(known_addresses - 2); - assert_eq!(known_addresses - 2, taken.len()); - assert!(!store.is_empty()); - - let mut prev: Option = None; - for address in taken { - // Addresses are still in the store. - assert!(store.addresses.contains_key(&address)); - - let record = store.addresses.get(&address).unwrap().clone(); - - if let Some(previous) = prev { - assert!(previous.score >= record.score); - } - - prev = Some(record); - } - } - - #[test] - fn attempt_to_take_excess_records() { - let mut store = AddressStore::new(); - let mut rng = rand::thread_rng(); - - store.insert(tcp_address_record(&mut rng)); - store.insert(ws_address_record(&mut rng)); - store.insert(quic_address_record(&mut rng)); - - assert_eq!(store.addresses.len(), 3); - - let taken = store.addresses(8usize); - assert_eq!(taken.len(), 3); - - let mut prev: Option = None; - for record in taken { - let record = store.addresses.get(&record).unwrap().clone(); - - if prev.is_none() { - prev = Some(record); - } else { - assert!(prev.unwrap().score >= record.score); - prev = Some(record); - } - } - } - - #[test] - fn extend_from_iterator() { - let mut store = AddressStore::new(); - let mut rng = rand::thread_rng(); - - let records = (0..10) - .map(|i| { - if i % 2 == 0 { - tcp_address_record(&mut rng) - } else if i % 3 == 0 { - quic_address_record(&mut rng) - } else { - ws_address_record(&mut rng) - } - }) - .collect::>(); - - assert!(store.is_empty()); - let cloned = records - .iter() - .cloned() - .map(|record| (record.address().clone(), record)) - .collect::>(); - store.extend(records); - - for record in store.addresses.values() { - let stored = cloned.get(record.address()).unwrap(); - assert_eq!(stored.score(), record.score()); - assert_eq!(stored.address(), record.address()); - } - } - - #[test] - fn extend_from_iterator_ref() { - let mut store = AddressStore::new(); - let mut rng = rand::thread_rng(); - - let records = (0..10) - .map(|i| { - if i % 2 == 0 { - let record = tcp_address_record(&mut rng); - (record.address().clone(), record) - } else if i % 3 == 0 { - let record = quic_address_record(&mut rng); - (record.address().clone(), record) - } else { - let record = ws_address_record(&mut rng); - (record.address().clone(), record) - } - }) - .collect::>(); - - assert!(store.is_empty()); - let cloned = records.iter().cloned().collect::>(); - store.extend(records.iter().map(|(_, record)| record)); - - for record in store.addresses.values() { - let stored = cloned.get(record.address()).unwrap(); - assert_eq!(stored.score(), record.score()); - assert_eq!(stored.address(), record.address()); - } - } - - #[test] - fn insert_record() { - let mut store = AddressStore::new(); - let mut rng = rand::thread_rng(); - - let mut record = tcp_address_record(&mut rng); - record.score = 10; - - store.insert(record.clone()); - - assert_eq!(store.addresses.len(), 1); - assert_eq!(store.addresses.get(record.address()).unwrap(), &record); - - // This time the record score is replaced (not accumulated). - store.insert(record.clone()); - - assert_eq!(store.addresses.len(), 1); - let store_record = store.addresses.get(record.address()).unwrap(); - assert_eq!(store_record.score, record.score); - } - - #[test] - fn insert_record_does_not_accumulate_public_bonus() { - let mut store = AddressStore::new(); - let peer = PeerId::random(); - - // Create a public address (8.8.8.8 is global) using from_multiaddr. - // The bonus is NOT applied at construction time, only when first inserted. - let address = Multiaddr::empty() - .with(Protocol::Ip4(Ipv4Addr::new(8, 8, 8, 8))) - .with(Protocol::Tcp(9999)) - .with(Protocol::P2p( - multihash::Multihash::from_bytes(&peer.to_bytes()).unwrap(), - )); - - let record = AddressRecord::from_multiaddr(address.clone()).unwrap(); - assert_eq!(record.score, 0); - - store.insert(record.clone()); - assert_eq!(store.addresses.len(), 1); - // Bonus applied on first insert. - assert_eq!( - store.addresses.get(&address).unwrap().score, - scores::PUBLIC_ADDRESS_BONUS - ); - - // Re-adding the same address should NOT accumulate the bonus. - let record2 = AddressRecord::from_multiaddr(address.clone()).unwrap(); - store.insert(record2); - - assert_eq!(store.addresses.len(), 1); - // Score should still be 1, not 2. - assert_eq!( - store.addresses.get(&address).unwrap().score, - scores::PUBLIC_ADDRESS_BONUS - ); - - // However, connection events should still update (replace) the score. - let connection_record = - AddressRecord::new(&peer, address.clone(), scores::CONNECTION_ESTABLISHED); - store.insert(connection_record); - - assert_eq!(store.addresses.len(), 1); - // Score should now be CONNECTION_ESTABLISHED (bonus only applied on first insert). - assert_eq!( - store.addresses.get(&address).unwrap().score, - scores::CONNECTION_ESTABLISHED - ); - } - - #[test] - fn rediscovery_does_not_wipe_dial_failure() { - let mut store = AddressStore::new(); - let peer = PeerId::random(); - - // Public address (8.8.8.8 is global). - let address = Multiaddr::empty() - .with(Protocol::Ip4(Ipv4Addr::new(8, 8, 8, 8))) - .with(Protocol::Tcp(9999)) - .with(Protocol::P2p( - multihash::Multihash::from_bytes(&peer.to_bytes()).unwrap(), - )); - - // First, add the address normally. - let record = AddressRecord::from_multiaddr(address.clone()).unwrap(); - store.insert(record); - assert_eq!( - store.addresses.get(&address).unwrap().score, - scores::PUBLIC_ADDRESS_BONUS - ); - - // Dial failure occurs (bonus only applied on first insert, not on updates). - let failure_record = AddressRecord::new(&peer, address.clone(), scores::CONNECTION_FAILURE); - store.insert(failure_record); - let failure_score = scores::CONNECTION_FAILURE; - assert_eq!(store.addresses.get(&address).unwrap().score, failure_score); - - // Address is rediscovered via Kademlia (creates record with score 0). - // This should NOT wipe out the dial failure score. - let rediscovered = AddressRecord::from_multiaddr(address.clone()).unwrap(); - assert_eq!(rediscovered.score, 0); - store.insert(rediscovered); - - // Score should still reflect the failure, not 0. - assert_eq!(store.addresses.get(&address).unwrap().score, failure_score); - } - - #[test] - fn evict_on_capacity() { - let mut store = AddressStore { - addresses: HashMap::new(), - max_capacity: 2, - }; - - let mut rng = rand::thread_rng(); - let mut first_record = tcp_address_record(&mut rng); - first_record.score = scores::CONNECTION_ESTABLISHED; - let mut second_record = ws_address_record(&mut rng); - second_record.score = 0; - - store.insert(first_record.clone()); - store.insert(second_record.clone()); - - assert_eq!(store.addresses.len(), 2); - - // We have better addresses, ignore this one. - let mut third_record = quic_address_record(&mut rng); - third_record.score = scores::CONNECTION_FAILURE; - store.insert(third_record.clone()); - assert_eq!(store.addresses.len(), 2); - assert!(store.addresses.contains_key(first_record.address())); - assert!(store.addresses.contains_key(second_record.address())); - - // Evict the address with the lowest score. - // Store contains scores: [100, 0]. - let mut fourth_record = quic_address_record(&mut rng); - fourth_record.score = 1; - store.insert(fourth_record.clone()); - - assert_eq!(store.addresses.len(), 2); - assert!(store.addresses.contains_key(first_record.address())); - assert!(store.addresses.contains_key(fourth_record.address())); - } + use std::{ + collections::HashMap, + net::{Ipv4Addr, SocketAddrV4}, + }; + + use super::*; + use rand::{rngs::ThreadRng, Rng}; + + fn tcp_address_record(rng: &mut ThreadRng) -> AddressRecord { + let peer = PeerId::random(); + let address = std::net::SocketAddr::V4(SocketAddrV4::new( + Ipv4Addr::new( + 10, + rng.gen_range(0..=255), + rng.gen_range(0..=255), + rng.gen_range(1..=255), + ), + rng.gen_range(1..=65535), + )); + let score: i32 = rng.gen_range(10..=200); + + AddressRecord::new( + &peer, + Multiaddr::empty() + .with(Protocol::from(address.ip())) + .with(Protocol::Tcp(address.port())), + score, + ) + } + + fn ws_address_record(rng: &mut ThreadRng) -> AddressRecord { + let peer = PeerId::random(); + let address = std::net::SocketAddr::V4(SocketAddrV4::new( + Ipv4Addr::new( + 10, + rng.gen_range(0..=255), + rng.gen_range(0..=255), + rng.gen_range(1..=255), + ), + rng.gen_range(1..=65535), + )); + let score: i32 = rng.gen_range(10..=200); + + AddressRecord::new( + &peer, + Multiaddr::empty() + .with(Protocol::from(address.ip())) + .with(Protocol::Tcp(address.port())) + .with(Protocol::Ws(std::borrow::Cow::Owned("/".to_string()))), + score, + ) + } + + fn quic_address_record(rng: &mut ThreadRng) -> AddressRecord { + let peer = PeerId::random(); + let address = std::net::SocketAddr::V4(SocketAddrV4::new( + Ipv4Addr::new( + 10, + rng.gen_range(0..=255), + rng.gen_range(0..=255), + rng.gen_range(1..=255), + ), + rng.gen_range(1..=65535), + )); + let score: i32 = rng.gen_range(10..=200); + + AddressRecord::new( + &peer, + Multiaddr::empty() + .with(Protocol::from(address.ip())) + .with(Protocol::Udp(address.port())) + .with(Protocol::QuicV1), + score, + ) + } + + #[test] + fn take_multiple_records() { + let mut store = AddressStore::new(); + let mut rng = rand::thread_rng(); + + for _ in 0..rng.gen_range(1..5) { + store.insert(tcp_address_record(&mut rng)); + } + for _ in 0..rng.gen_range(1..5) { + store.insert(ws_address_record(&mut rng)); + } + for _ in 0..rng.gen_range(1..5) { + store.insert(quic_address_record(&mut rng)); + } + + let known_addresses = store.addresses.len(); + assert!(known_addresses >= 3); + + let taken = store.addresses(known_addresses - 2); + assert_eq!(known_addresses - 2, taken.len()); + assert!(!store.is_empty()); + + let mut prev: Option = None; + for address in taken { + // Addresses are still in the store. + assert!(store.addresses.contains_key(&address)); + + let record = store.addresses.get(&address).unwrap().clone(); + + if let Some(previous) = prev { + assert!(previous.score >= record.score); + } + + prev = Some(record); + } + } + + #[test] + fn attempt_to_take_excess_records() { + let mut store = AddressStore::new(); + let mut rng = rand::thread_rng(); + + store.insert(tcp_address_record(&mut rng)); + store.insert(ws_address_record(&mut rng)); + store.insert(quic_address_record(&mut rng)); + + assert_eq!(store.addresses.len(), 3); + + let taken = store.addresses(8usize); + assert_eq!(taken.len(), 3); + + let mut prev: Option = None; + for record in taken { + let record = store.addresses.get(&record).unwrap().clone(); + + if prev.is_none() { + prev = Some(record); + } else { + assert!(prev.unwrap().score >= record.score); + prev = Some(record); + } + } + } + + #[test] + fn extend_from_iterator() { + let mut store = AddressStore::new(); + let mut rng = rand::thread_rng(); + + let records = (0..10) + .map(|i| { + if i % 2 == 0 { + tcp_address_record(&mut rng) + } else if i % 3 == 0 { + quic_address_record(&mut rng) + } else { + ws_address_record(&mut rng) + } + }) + .collect::>(); + + assert!(store.is_empty()); + let cloned = records + .iter() + .cloned() + .map(|record| (record.address().clone(), record)) + .collect::>(); + store.extend(records); + + for record in store.addresses.values() { + let stored = cloned.get(record.address()).unwrap(); + assert_eq!(stored.score(), record.score()); + assert_eq!(stored.address(), record.address()); + } + } + + #[test] + fn extend_from_iterator_ref() { + let mut store = AddressStore::new(); + let mut rng = rand::thread_rng(); + + let records = (0..10) + .map(|i| { + if i % 2 == 0 { + let record = tcp_address_record(&mut rng); + (record.address().clone(), record) + } else if i % 3 == 0 { + let record = quic_address_record(&mut rng); + (record.address().clone(), record) + } else { + let record = ws_address_record(&mut rng); + (record.address().clone(), record) + } + }) + .collect::>(); + + assert!(store.is_empty()); + let cloned = records.iter().cloned().collect::>(); + store.extend(records.iter().map(|(_, record)| record)); + + for record in store.addresses.values() { + let stored = cloned.get(record.address()).unwrap(); + assert_eq!(stored.score(), record.score()); + assert_eq!(stored.address(), record.address()); + } + } + + #[test] + fn insert_record() { + let mut store = AddressStore::new(); + let mut rng = rand::thread_rng(); + + let mut record = tcp_address_record(&mut rng); + record.score = 10; + + store.insert(record.clone()); + + assert_eq!(store.addresses.len(), 1); + assert_eq!(store.addresses.get(record.address()).unwrap(), &record); + + // This time the record score is replaced (not accumulated). + store.insert(record.clone()); + + assert_eq!(store.addresses.len(), 1); + let store_record = store.addresses.get(record.address()).unwrap(); + assert_eq!(store_record.score, record.score); + } + + #[test] + fn insert_record_does_not_accumulate_public_bonus() { + let mut store = AddressStore::new(); + let peer = PeerId::random(); + + // Create a public address (8.8.8.8 is global) using from_multiaddr. + // The bonus is NOT applied at construction time, only when first inserted. + let address = Multiaddr::empty() + .with(Protocol::Ip4(Ipv4Addr::new(8, 8, 8, 8))) + .with(Protocol::Tcp(9999)) + .with(Protocol::P2p(multihash::Multihash::from_bytes(&peer.to_bytes()).unwrap())); + + let record = AddressRecord::from_multiaddr(address.clone()).unwrap(); + assert_eq!(record.score, 0); + + store.insert(record.clone()); + assert_eq!(store.addresses.len(), 1); + // Bonus applied on first insert. + assert_eq!(store.addresses.get(&address).unwrap().score, scores::PUBLIC_ADDRESS_BONUS); + + // Re-adding the same address should NOT accumulate the bonus. + let record2 = AddressRecord::from_multiaddr(address.clone()).unwrap(); + store.insert(record2); + + assert_eq!(store.addresses.len(), 1); + // Score should still be 1, not 2. + assert_eq!(store.addresses.get(&address).unwrap().score, scores::PUBLIC_ADDRESS_BONUS); + + // However, connection events should still update (replace) the score. + let connection_record = + AddressRecord::new(&peer, address.clone(), scores::CONNECTION_ESTABLISHED); + store.insert(connection_record); + + assert_eq!(store.addresses.len(), 1); + // Score should now be CONNECTION_ESTABLISHED (bonus only applied on first insert). + assert_eq!(store.addresses.get(&address).unwrap().score, scores::CONNECTION_ESTABLISHED); + } + + #[test] + fn rediscovery_does_not_wipe_dial_failure() { + let mut store = AddressStore::new(); + let peer = PeerId::random(); + + // Public address (8.8.8.8 is global). + let address = Multiaddr::empty() + .with(Protocol::Ip4(Ipv4Addr::new(8, 8, 8, 8))) + .with(Protocol::Tcp(9999)) + .with(Protocol::P2p(multihash::Multihash::from_bytes(&peer.to_bytes()).unwrap())); + + // First, add the address normally. + let record = AddressRecord::from_multiaddr(address.clone()).unwrap(); + store.insert(record); + assert_eq!(store.addresses.get(&address).unwrap().score, scores::PUBLIC_ADDRESS_BONUS); + + // Dial failure occurs (bonus only applied on first insert, not on updates). + let failure_record = AddressRecord::new(&peer, address.clone(), scores::CONNECTION_FAILURE); + store.insert(failure_record); + let failure_score = scores::CONNECTION_FAILURE; + assert_eq!(store.addresses.get(&address).unwrap().score, failure_score); + + // Address is rediscovered via Kademlia (creates record with score 0). + // This should NOT wipe out the dial failure score. + let rediscovered = AddressRecord::from_multiaddr(address.clone()).unwrap(); + assert_eq!(rediscovered.score, 0); + store.insert(rediscovered); + + // Score should still reflect the failure, not 0. + assert_eq!(store.addresses.get(&address).unwrap().score, failure_score); + } + + #[test] + fn evict_on_capacity() { + let mut store = AddressStore { addresses: HashMap::new(), max_capacity: 2 }; + + let mut rng = rand::thread_rng(); + let mut first_record = tcp_address_record(&mut rng); + first_record.score = scores::CONNECTION_ESTABLISHED; + let mut second_record = ws_address_record(&mut rng); + second_record.score = 0; + + store.insert(first_record.clone()); + store.insert(second_record.clone()); + + assert_eq!(store.addresses.len(), 2); + + // We have better addresses, ignore this one. + let mut third_record = quic_address_record(&mut rng); + third_record.score = scores::CONNECTION_FAILURE; + store.insert(third_record.clone()); + assert_eq!(store.addresses.len(), 2); + assert!(store.addresses.contains_key(first_record.address())); + assert!(store.addresses.contains_key(second_record.address())); + + // Evict the address with the lowest score. + // Store contains scores: [100, 0]. + let mut fourth_record = quic_address_record(&mut rng); + fourth_record.score = 1; + store.insert(fourth_record.clone()); + + assert_eq!(store.addresses.len(), 2); + assert!(store.addresses.contains_key(first_record.address())); + assert!(store.addresses.contains_key(fourth_record.address())); + } } diff --git a/client/litep2p/src/transport/manager/handle.rs b/client/litep2p/src/transport/manager/handle.rs index 68eda73f..9dbfd87a 100644 --- a/client/litep2p/src/transport/manager/handle.rs +++ b/client/litep2p/src/transport/manager/handle.rs @@ -19,19 +19,19 @@ // DEALINGS IN THE SOFTWARE. use crate::{ - addresses::PublicAddresses, - crypto::dilithium::Keypair, - error::ImmediateDialError, - executor::Executor, - protocol::ProtocolSet, - transport::manager::{ - address::AddressRecord, - peer_state::StateDialResult, - types::{PeerContext, SupportedTransport}, - ProtocolContext, TransportManagerEvent, LOG_TARGET, - }, - types::{protocol::ProtocolName, ConnectionId}, - BandwidthSink, PeerId, + addresses::PublicAddresses, + crypto::dilithium::Keypair, + error::ImmediateDialError, + executor::Executor, + protocol::ProtocolSet, + transport::manager::{ + address::AddressRecord, + peer_state::StateDialResult, + types::{PeerContext, SupportedTransport}, + ProtocolContext, TransportManagerEvent, LOG_TARGET, + }, + types::{protocol::ProtocolName, ConnectionId}, + BandwidthSink, PeerId, }; use multiaddr::{Multiaddr, Protocol}; @@ -39,837 +39,834 @@ use parking_lot::RwLock; use tokio::sync::mpsc::{error::TrySendError, Sender}; use std::{ - collections::{HashMap, HashSet}, - net::IpAddr, - sync::{ - atomic::{AtomicUsize, Ordering}, - Arc, - }, + collections::{HashMap, HashSet}, + net::IpAddr, + sync::{ + atomic::{AtomicUsize, Ordering}, + Arc, + }, }; /// Inner commands sent from [`TransportManagerHandle`] to /// [`crate::transport::manager::TransportManager`]. pub enum InnerTransportManagerCommand { - /// Dial peer. - DialPeer { - /// Remote peer ID. - peer: PeerId, - }, - - /// Dial address. - DialAddress { - /// Remote address. - address: Multiaddr, - }, - - UnregisterProtocol { - /// Protocol name. - protocol: ProtocolName, - }, + /// Dial peer. + DialPeer { + /// Remote peer ID. + peer: PeerId, + }, + + /// Dial address. + DialAddress { + /// Remote address. + address: Multiaddr, + }, + + UnregisterProtocol { + /// Protocol name. + protocol: ProtocolName, + }, } /// Handle for communicating with [`crate::transport::manager::TransportManager`]. #[derive(Debug, Clone)] pub struct TransportManagerHandle { - /// Local peer ID. - local_peer_id: PeerId, + /// Local peer ID. + local_peer_id: PeerId, - /// Peers. - peers: Arc>>, + /// Peers. + peers: Arc>>, - /// TX channel for sending commands to [`crate::transport::manager::TransportManager`]. - cmd_tx: Sender, + /// TX channel for sending commands to [`crate::transport::manager::TransportManager`]. + cmd_tx: Sender, - /// Supported transports. - supported_transport: HashSet, + /// Supported transports. + supported_transport: HashSet, - /// Local listen addresess. - listen_addresses: Arc>>, + /// Local listen addresess. + listen_addresses: Arc>>, - /// Public addresses. - public_addresses: PublicAddresses, + /// Public addresses. + public_addresses: PublicAddresses, } impl TransportManagerHandle { - /// Create new [`TransportManagerHandle`]. - pub fn new( - local_peer_id: PeerId, - peers: Arc>>, - cmd_tx: Sender, - supported_transport: HashSet, - listen_addresses: Arc>>, - public_addresses: PublicAddresses, - ) -> Self { - Self { - peers, - cmd_tx, - local_peer_id, - supported_transport, - listen_addresses, - public_addresses, - } - } - - /// Register new transport to [`TransportManagerHandle`]. - pub(crate) fn register_transport(&mut self, transport: SupportedTransport) { - self.supported_transport.insert(transport); - } - - /// Get the list of public addresses of the node. - pub(crate) fn public_addresses(&self) -> PublicAddresses { - self.public_addresses.clone() - } - - /// Get the list of listen addresses of the node. - pub(crate) fn listen_addresses(&self) -> HashSet { - self.listen_addresses.read().clone() - } - - /// Check if `address` is supported by one of the enabled transports. - pub fn supported_transport(&self, address: &Multiaddr) -> bool { - let mut iter = address.iter(); - - match iter.next() { - Some(Protocol::Ip4(address)) => - if address.is_unspecified() { - return false; - }, - Some(Protocol::Ip6(address)) => - if address.is_unspecified() { - return false; - }, - Some(Protocol::Dns(_)) | Some(Protocol::Dns4(_)) | Some(Protocol::Dns6(_)) => {} - _ => return false, - } - - match iter.next() { - None => false, - Some(Protocol::Tcp(_)) => match (iter.next(), iter.next(), iter.next()) { - (Some(Protocol::P2p(_)), None, None) => - self.supported_transport.contains(&SupportedTransport::Tcp), - #[cfg(feature = "websocket")] - (Some(Protocol::Ws(_)), Some(Protocol::P2p(_)), None) => - self.supported_transport.contains(&SupportedTransport::WebSocket), - #[cfg(feature = "websocket")] - (Some(Protocol::Wss(_)), Some(Protocol::P2p(_)), None) => - self.supported_transport.contains(&SupportedTransport::WebSocket), - _ => false, - }, - #[cfg(feature = "quic")] - Some(Protocol::Udp(_)) => match (iter.next(), iter.next(), iter.next()) { - (Some(Protocol::QuicV1), Some(Protocol::P2p(_)), None) => - self.supported_transport.contains(&SupportedTransport::Quic), - _ => false, - }, - _ => false, - } - } - - /// Helper to extract IP and Port from a Multiaddr - fn extract_ip_port(addr: &Multiaddr) -> Option<(IpAddr, u16)> { - let mut iter = addr.iter(); - let ip = match iter.next() { - Some(Protocol::Ip4(i)) => IpAddr::V4(i), - Some(Protocol::Ip6(i)) => IpAddr::V6(i), - _ => return None, - }; - - let port = match iter.next() { - Some(Protocol::Tcp(p)) | Some(Protocol::Udp(p)) => p, - _ => return None, - }; - - Some((ip, port)) - } - - /// Check if the address is a local listen address and if so, discard it. - fn is_local_address(&self, address: &Multiaddr) -> bool { - // Strip the peer ID if present. - let address: Multiaddr = address - .iter() - .take_while(|protocol| !std::matches!(protocol, Protocol::P2p(_))) - .collect(); - - // Check for the exact match. - let listen_addresses = self.listen_addresses.read(); - if listen_addresses.contains(&address) { - return true; - } - - let Some((ip, port)) = Self::extract_ip_port(&address) else { - return false; - }; - - for listen_address in listen_addresses.iter() { - let Some((listen_ip, listen_port)) = Self::extract_ip_port(listen_address) else { - continue; - }; - - if port == listen_port { - // Exact IP match. - if listen_ip == ip { - return true; - } - - // Check if the listener is binding to any (0.0.0.0) interface - // and the incoming is a loopback address. - if listen_ip.is_unspecified() && ip.is_loopback() { - return true; - } - - // Check for ipv4/ipv6 loopback equivalence. - if listen_ip.is_loopback() && ip.is_loopback() { - return true; - } - } - } - - false - } - - /// Add one or more known addresses for peer. - /// - /// If peer doesn't exist, it will be added to known peers. - /// - /// Returns the number of added addresses after non-supported transports were filtered out. - pub fn add_known_address( - &mut self, - peer: &PeerId, - addresses: impl Iterator, - ) -> usize { - let mut peer_addresses = HashSet::new(); - - for address in addresses { - // There is not supported transport configured that can dial this address. - if !self.supported_transport(&address) { - continue; - } - if self.is_local_address(&address) { - continue; - } - - // Check the peer ID if present. - if let Some(Protocol::P2p(multihash)) = address.iter().last() { - // This can correspond to the provided peerID or to a different one. - if multihash != *peer.as_ref() { - tracing::debug!( - target: LOG_TARGET, - ?peer, - ?address, - "Refusing to add known address that corresponds to a different peer ID", - ); - - continue; - } - - peer_addresses.insert(address); - } else { - // Add the provided peer ID to the address. - let address = address.with(Protocol::P2p(multihash::Multihash::from(*peer))); - peer_addresses.insert(address); - } - } - - let num_added = peer_addresses.len(); - - tracing::trace!( - target: LOG_TARGET, - ?peer, - ?peer_addresses, - "add known addresses", - ); - - let mut peers = self.peers.write(); - let entry = peers.entry(*peer).or_default(); - - // All addresses should be valid at this point, since the peer ID was either added or - // double checked. - entry - .addresses - .extend(peer_addresses.into_iter().filter_map(AddressRecord::from_multiaddr)); - - num_added - } - - /// Dial peer using `PeerId`. - /// - /// Returns an error if the peer is unknown or the peer is already connected. - pub fn dial(&self, peer: &PeerId) -> Result<(), ImmediateDialError> { - if peer == &self.local_peer_id { - return Err(ImmediateDialError::TriedToDialSelf); - } - - { - let peers = self.peers.read(); - let Some(PeerContext { state, addresses }) = peers.get(peer) else { - return Err(ImmediateDialError::NoAddressAvailable); - }; - - match state.can_dial() { - StateDialResult::AlreadyConnected => - return Err(ImmediateDialError::AlreadyConnected), - StateDialResult::DialingInProgress => return Ok(()), - StateDialResult::Ok => {} - }; - - // Check if we have enough addresses to dial. - if addresses.is_empty() { - return Err(ImmediateDialError::NoAddressAvailable); - } - } - - self.cmd_tx - .try_send(InnerTransportManagerCommand::DialPeer { peer: *peer }) - .map_err(|error| match error { - TrySendError::Full(_) => ImmediateDialError::ChannelClogged, - TrySendError::Closed(_) => ImmediateDialError::TaskClosed, - }) - } - - /// Dial peer using `Multiaddr`. - /// - /// Returns an error if address it not valid. - pub fn dial_address(&self, address: Multiaddr) -> Result<(), ImmediateDialError> { - if !address.iter().any(|protocol| std::matches!(protocol, Protocol::P2p(_))) { - return Err(ImmediateDialError::PeerIdMissing); - } - - self.cmd_tx - .try_send(InnerTransportManagerCommand::DialAddress { address }) - .map_err(|error| match error { - TrySendError::Full(_) => ImmediateDialError::ChannelClogged, - TrySendError::Closed(_) => ImmediateDialError::TaskClosed, - }) - } - - /// Dynamically unregister a protocol. - /// - /// This must be called when a protocol is no longer needed (e.g. user dropped the protocol - /// handle). - pub fn unregister_protocol(&self, protocol: ProtocolName) { - tracing::info!( - target: LOG_TARGET, - ?protocol, - "Unregistering user protocol on handle drop" - ); - - if let Err(err) = self - .cmd_tx - .try_send(InnerTransportManagerCommand::UnregisterProtocol { protocol }) - { - tracing::error!( - target: LOG_TARGET, - ?err, - "Failed to unregister protocol" - ); - } - } + /// Create new [`TransportManagerHandle`]. + pub fn new( + local_peer_id: PeerId, + peers: Arc>>, + cmd_tx: Sender, + supported_transport: HashSet, + listen_addresses: Arc>>, + public_addresses: PublicAddresses, + ) -> Self { + Self { + peers, + cmd_tx, + local_peer_id, + supported_transport, + listen_addresses, + public_addresses, + } + } + + /// Register new transport to [`TransportManagerHandle`]. + pub(crate) fn register_transport(&mut self, transport: SupportedTransport) { + self.supported_transport.insert(transport); + } + + /// Get the list of public addresses of the node. + pub(crate) fn public_addresses(&self) -> PublicAddresses { + self.public_addresses.clone() + } + + /// Get the list of listen addresses of the node. + pub(crate) fn listen_addresses(&self) -> HashSet { + self.listen_addresses.read().clone() + } + + /// Check if `address` is supported by one of the enabled transports. + pub fn supported_transport(&self, address: &Multiaddr) -> bool { + let mut iter = address.iter(); + + match iter.next() { + Some(Protocol::Ip4(address)) => + if address.is_unspecified() { + return false; + }, + Some(Protocol::Ip6(address)) => + if address.is_unspecified() { + return false; + }, + Some(Protocol::Dns(_)) | Some(Protocol::Dns4(_)) | Some(Protocol::Dns6(_)) => {}, + _ => return false, + } + + match iter.next() { + None => false, + Some(Protocol::Tcp(_)) => match (iter.next(), iter.next(), iter.next()) { + (Some(Protocol::P2p(_)), None, None) => + self.supported_transport.contains(&SupportedTransport::Tcp), + #[cfg(feature = "websocket")] + (Some(Protocol::Ws(_)), Some(Protocol::P2p(_)), None) => + self.supported_transport.contains(&SupportedTransport::WebSocket), + #[cfg(feature = "websocket")] + (Some(Protocol::Wss(_)), Some(Protocol::P2p(_)), None) => + self.supported_transport.contains(&SupportedTransport::WebSocket), + _ => false, + }, + #[cfg(feature = "quic")] + Some(Protocol::Udp(_)) => match (iter.next(), iter.next(), iter.next()) { + (Some(Protocol::QuicV1), Some(Protocol::P2p(_)), None) => + self.supported_transport.contains(&SupportedTransport::Quic), + _ => false, + }, + _ => false, + } + } + + /// Helper to extract IP and Port from a Multiaddr + fn extract_ip_port(addr: &Multiaddr) -> Option<(IpAddr, u16)> { + let mut iter = addr.iter(); + let ip = match iter.next() { + Some(Protocol::Ip4(i)) => IpAddr::V4(i), + Some(Protocol::Ip6(i)) => IpAddr::V6(i), + _ => return None, + }; + + let port = match iter.next() { + Some(Protocol::Tcp(p)) | Some(Protocol::Udp(p)) => p, + _ => return None, + }; + + Some((ip, port)) + } + + /// Check if the address is a local listen address and if so, discard it. + fn is_local_address(&self, address: &Multiaddr) -> bool { + // Strip the peer ID if present. + let address: Multiaddr = address + .iter() + .take_while(|protocol| !std::matches!(protocol, Protocol::P2p(_))) + .collect(); + + // Check for the exact match. + let listen_addresses = self.listen_addresses.read(); + if listen_addresses.contains(&address) { + return true; + } + + let Some((ip, port)) = Self::extract_ip_port(&address) else { + return false; + }; + + for listen_address in listen_addresses.iter() { + let Some((listen_ip, listen_port)) = Self::extract_ip_port(listen_address) else { + continue; + }; + + if port == listen_port { + // Exact IP match. + if listen_ip == ip { + return true; + } + + // Check if the listener is binding to any (0.0.0.0) interface + // and the incoming is a loopback address. + if listen_ip.is_unspecified() && ip.is_loopback() { + return true; + } + + // Check for ipv4/ipv6 loopback equivalence. + if listen_ip.is_loopback() && ip.is_loopback() { + return true; + } + } + } + + false + } + + /// Add one or more known addresses for peer. + /// + /// If peer doesn't exist, it will be added to known peers. + /// + /// Returns the number of added addresses after non-supported transports were filtered out. + pub fn add_known_address( + &mut self, + peer: &PeerId, + addresses: impl Iterator, + ) -> usize { + let mut peer_addresses = HashSet::new(); + + for address in addresses { + // There is not supported transport configured that can dial this address. + if !self.supported_transport(&address) { + continue; + } + if self.is_local_address(&address) { + continue; + } + + // Check the peer ID if present. + if let Some(Protocol::P2p(multihash)) = address.iter().last() { + // This can correspond to the provided peerID or to a different one. + if multihash != *peer.as_ref() { + tracing::debug!( + target: LOG_TARGET, + ?peer, + ?address, + "Refusing to add known address that corresponds to a different peer ID", + ); + + continue; + } + + peer_addresses.insert(address); + } else { + // Add the provided peer ID to the address. + let address = address.with(Protocol::P2p(multihash::Multihash::from(*peer))); + peer_addresses.insert(address); + } + } + + let num_added = peer_addresses.len(); + + tracing::trace!( + target: LOG_TARGET, + ?peer, + ?peer_addresses, + "add known addresses", + ); + + let mut peers = self.peers.write(); + let entry = peers.entry(*peer).or_default(); + + // All addresses should be valid at this point, since the peer ID was either added or + // double checked. + entry + .addresses + .extend(peer_addresses.into_iter().filter_map(AddressRecord::from_multiaddr)); + + num_added + } + + /// Dial peer using `PeerId`. + /// + /// Returns an error if the peer is unknown or the peer is already connected. + pub fn dial(&self, peer: &PeerId) -> Result<(), ImmediateDialError> { + if peer == &self.local_peer_id { + return Err(ImmediateDialError::TriedToDialSelf); + } + + { + let peers = self.peers.read(); + let Some(PeerContext { state, addresses }) = peers.get(peer) else { + return Err(ImmediateDialError::NoAddressAvailable); + }; + + match state.can_dial() { + StateDialResult::AlreadyConnected => + return Err(ImmediateDialError::AlreadyConnected), + StateDialResult::DialingInProgress => return Ok(()), + StateDialResult::Ok => {}, + }; + + // Check if we have enough addresses to dial. + if addresses.is_empty() { + return Err(ImmediateDialError::NoAddressAvailable); + } + } + + self.cmd_tx + .try_send(InnerTransportManagerCommand::DialPeer { peer: *peer }) + .map_err(|error| match error { + TrySendError::Full(_) => ImmediateDialError::ChannelClogged, + TrySendError::Closed(_) => ImmediateDialError::TaskClosed, + }) + } + + /// Dial peer using `Multiaddr`. + /// + /// Returns an error if address it not valid. + pub fn dial_address(&self, address: Multiaddr) -> Result<(), ImmediateDialError> { + if !address.iter().any(|protocol| std::matches!(protocol, Protocol::P2p(_))) { + return Err(ImmediateDialError::PeerIdMissing); + } + + self.cmd_tx + .try_send(InnerTransportManagerCommand::DialAddress { address }) + .map_err(|error| match error { + TrySendError::Full(_) => ImmediateDialError::ChannelClogged, + TrySendError::Closed(_) => ImmediateDialError::TaskClosed, + }) + } + + /// Dynamically unregister a protocol. + /// + /// This must be called when a protocol is no longer needed (e.g. user dropped the protocol + /// handle). + pub fn unregister_protocol(&self, protocol: ProtocolName) { + tracing::info!( + target: LOG_TARGET, + ?protocol, + "Unregistering user protocol on handle drop" + ); + + if let Err(err) = self + .cmd_tx + .try_send(InnerTransportManagerCommand::UnregisterProtocol { protocol }) + { + tracing::error!( + target: LOG_TARGET, + ?err, + "Failed to unregister protocol" + ); + } + } } pub struct TransportHandle { - pub keypair: Keypair, - pub tx: Sender, - pub protocols: HashMap, - pub next_connection_id: Arc, - pub next_substream_id: Arc, - pub bandwidth_sink: BandwidthSink, - pub executor: Arc, + pub keypair: Keypair, + pub tx: Sender, + pub protocols: HashMap, + pub next_connection_id: Arc, + pub next_substream_id: Arc, + pub bandwidth_sink: BandwidthSink, + pub executor: Arc, } impl TransportHandle { - pub fn protocol_set(&self, connection_id: ConnectionId) -> ProtocolSet { - ProtocolSet::new( - connection_id, - self.tx.clone(), - self.next_substream_id.clone(), - self.protocols.clone(), - ) - } - - /// Get next connection ID. - pub fn next_connection_id(&mut self) -> ConnectionId { - let connection_id = self.next_connection_id.fetch_add(1usize, Ordering::Relaxed); - - ConnectionId::from(connection_id) - } + pub fn protocol_set(&self, connection_id: ConnectionId) -> ProtocolSet { + ProtocolSet::new( + connection_id, + self.tx.clone(), + self.next_substream_id.clone(), + self.protocols.clone(), + ) + } + + /// Get next connection ID. + pub fn next_connection_id(&mut self) -> ConnectionId { + let connection_id = self.next_connection_id.fetch_add(1usize, Ordering::Relaxed); + + ConnectionId::from(connection_id) + } } #[cfg(test)] mod tests { - use crate::transport::manager::{ - address::AddressStore, - peer_state::{ConnectionRecord, PeerState}, - }; - - use super::*; - use multihash::Multihash; - use parking_lot::lock_api::RwLock; - use tokio::sync::mpsc::{channel, Receiver}; - - fn make_transport_manager_handle() -> ( - TransportManagerHandle, - Receiver, - ) { - let (cmd_tx, cmd_rx) = channel(64); - - let local_peer_id = PeerId::random(); - ( - TransportManagerHandle { - local_peer_id, - cmd_tx, - peers: Default::default(), - supported_transport: HashSet::new(), - listen_addresses: Default::default(), - public_addresses: PublicAddresses::new(local_peer_id), - }, - cmd_rx, - ) - } - - #[tokio::test] - async fn tcp_supported() { - let (mut handle, _rx) = make_transport_manager_handle(); - handle.supported_transport.insert(SupportedTransport::Tcp); - - let address = - "/dns4/google.com/tcp/24928/p2p/12D3KooWKrUnV42yDR7G6DewmgHtFaVCJWLjQRi2G9t5eJD3BvTy" - .parse() - .unwrap(); - assert!(handle.supported_transport(&address)); - } - - #[tokio::test] - async fn tcp_unsupported() { - let (handle, _rx) = make_transport_manager_handle(); - - let address = - "/dns4/google.com/tcp/24928/p2p/12D3KooWKrUnV42yDR7G6DewmgHtFaVCJWLjQRi2G9t5eJD3BvTy" - .parse() - .unwrap(); - assert!(!handle.supported_transport(&address)); - } - - #[tokio::test] - async fn tcp_non_terminal_unsupported() { - let (mut handle, _rx) = make_transport_manager_handle(); - handle.supported_transport.insert(SupportedTransport::Tcp); - - let address = + use crate::transport::manager::{ + address::AddressStore, + peer_state::{ConnectionRecord, PeerState}, + }; + + use super::*; + use multihash::Multihash; + use parking_lot::lock_api::RwLock; + use tokio::sync::mpsc::{channel, Receiver}; + + fn make_transport_manager_handle( + ) -> (TransportManagerHandle, Receiver) { + let (cmd_tx, cmd_rx) = channel(64); + + let local_peer_id = PeerId::random(); + ( + TransportManagerHandle { + local_peer_id, + cmd_tx, + peers: Default::default(), + supported_transport: HashSet::new(), + listen_addresses: Default::default(), + public_addresses: PublicAddresses::new(local_peer_id), + }, + cmd_rx, + ) + } + + #[tokio::test] + async fn tcp_supported() { + let (mut handle, _rx) = make_transport_manager_handle(); + handle.supported_transport.insert(SupportedTransport::Tcp); + + let address = + "/dns4/google.com/tcp/24928/p2p/12D3KooWKrUnV42yDR7G6DewmgHtFaVCJWLjQRi2G9t5eJD3BvTy" + .parse() + .unwrap(); + assert!(handle.supported_transport(&address)); + } + + #[tokio::test] + async fn tcp_unsupported() { + let (handle, _rx) = make_transport_manager_handle(); + + let address = + "/dns4/google.com/tcp/24928/p2p/12D3KooWKrUnV42yDR7G6DewmgHtFaVCJWLjQRi2G9t5eJD3BvTy" + .parse() + .unwrap(); + assert!(!handle.supported_transport(&address)); + } + + #[tokio::test] + async fn tcp_non_terminal_unsupported() { + let (mut handle, _rx) = make_transport_manager_handle(); + handle.supported_transport.insert(SupportedTransport::Tcp); + + let address = "/dns4/google.com/tcp/24928/p2p/12D3KooWKrUnV42yDR7G6DewmgHtFaVCJWLjQRi2G9t5eJD3BvTy/p2p-circuit" .parse() .unwrap(); - assert!(!handle.supported_transport(&address)); - } + assert!(!handle.supported_transport(&address)); + } - #[cfg(feature = "websocket")] - #[tokio::test] - async fn websocket_supported() { - let (mut handle, _rx) = make_transport_manager_handle(); - handle.supported_transport.insert(SupportedTransport::WebSocket); + #[cfg(feature = "websocket")] + #[tokio::test] + async fn websocket_supported() { + let (mut handle, _rx) = make_transport_manager_handle(); + handle.supported_transport.insert(SupportedTransport::WebSocket); - let address = + let address = "/dns4/google.com/tcp/24928/ws/p2p/12D3KooWKrUnV42yDR7G6DewmgHtFaVCJWLjQRi2G9t5eJD3BvTy" .parse() .unwrap(); - assert!(handle.supported_transport(&address)); - } + assert!(handle.supported_transport(&address)); + } - #[cfg(feature = "websocket")] - #[tokio::test] - async fn websocket_unsupported() { - let (handle, _rx) = make_transport_manager_handle(); + #[cfg(feature = "websocket")] + #[tokio::test] + async fn websocket_unsupported() { + let (handle, _rx) = make_transport_manager_handle(); - let address = + let address = "/dns4/google.com/tcp/24928/ws/p2p/12D3KooWKrUnV42yDR7G6DewmgHtFaVCJWLjQRi2G9t5eJD3BvTy" .parse() .unwrap(); - assert!(!handle.supported_transport(&address)); - } + assert!(!handle.supported_transport(&address)); + } - #[cfg(feature = "websocket")] - #[tokio::test] - async fn websocket_non_terminal_unsupported() { - let (mut handle, _rx) = make_transport_manager_handle(); - handle.supported_transport.insert(SupportedTransport::WebSocket); + #[cfg(feature = "websocket")] + #[tokio::test] + async fn websocket_non_terminal_unsupported() { + let (mut handle, _rx) = make_transport_manager_handle(); + handle.supported_transport.insert(SupportedTransport::WebSocket); - let address = + let address = "/dns4/google.com/tcp/24928/ws/p2p/12D3KooWKrUnV42yDR7G6DewmgHtFaVCJWLjQRi2G9t5eJD3BvTy/p2p-circuit" .parse() .unwrap(); - assert!(!handle.supported_transport(&address)); - } + assert!(!handle.supported_transport(&address)); + } - #[cfg(feature = "websocket")] - #[tokio::test] - async fn wss_supported() { - let (mut handle, _rx) = make_transport_manager_handle(); - handle.supported_transport.insert(SupportedTransport::WebSocket); + #[cfg(feature = "websocket")] + #[tokio::test] + async fn wss_supported() { + let (mut handle, _rx) = make_transport_manager_handle(); + handle.supported_transport.insert(SupportedTransport::WebSocket); - let address = + let address = "/dns4/google.com/tcp/24928/wss/p2p/12D3KooWKrUnV42yDR7G6DewmgHtFaVCJWLjQRi2G9t5eJD3BvTy" .parse() .unwrap(); - assert!(handle.supported_transport(&address)); - } + assert!(handle.supported_transport(&address)); + } - #[cfg(feature = "websocket")] - #[tokio::test] - async fn wss_unsupported() { - let (handle, _rx) = make_transport_manager_handle(); + #[cfg(feature = "websocket")] + #[tokio::test] + async fn wss_unsupported() { + let (handle, _rx) = make_transport_manager_handle(); - let address = + let address = "/dns4/google.com/tcp/24928/wss/p2p/12D3KooWKrUnV42yDR7G6DewmgHtFaVCJWLjQRi2G9t5eJD3BvTy" .parse() .unwrap(); - assert!(!handle.supported_transport(&address)); - } + assert!(!handle.supported_transport(&address)); + } - #[cfg(feature = "websocket")] - #[tokio::test] - async fn wss_non_terminal_unsupported() { - let (mut handle, _rx) = make_transport_manager_handle(); - handle.supported_transport.insert(SupportedTransport::WebSocket); + #[cfg(feature = "websocket")] + #[tokio::test] + async fn wss_non_terminal_unsupported() { + let (mut handle, _rx) = make_transport_manager_handle(); + handle.supported_transport.insert(SupportedTransport::WebSocket); - let address = + let address = "/dns4/google.com/tcp/24928/wss/p2p/12D3KooWKrUnV42yDR7G6DewmgHtFaVCJWLjQRi2G9t5eJD3BvTy/p2p-circuit" .parse() .unwrap(); - assert!(!handle.supported_transport(&address)); - } + assert!(!handle.supported_transport(&address)); + } - #[cfg(feature = "quic")] - #[tokio::test] - async fn quic_supported() { - let (mut handle, _rx) = make_transport_manager_handle(); - handle.supported_transport.insert(SupportedTransport::Quic); + #[cfg(feature = "quic")] + #[tokio::test] + async fn quic_supported() { + let (mut handle, _rx) = make_transport_manager_handle(); + handle.supported_transport.insert(SupportedTransport::Quic); - let address = + let address = "/dns4/google.com/udp/24928/quic-v1/p2p/12D3KooWKrUnV42yDR7G6DewmgHtFaVCJWLjQRi2G9t5eJD3BvTy" .parse() .unwrap(); - assert!(handle.supported_transport(&address)); - } + assert!(handle.supported_transport(&address)); + } - #[cfg(feature = "quic")] - #[tokio::test] - async fn quic_unsupported() { - let (handle, _rx) = make_transport_manager_handle(); + #[cfg(feature = "quic")] + #[tokio::test] + async fn quic_unsupported() { + let (handle, _rx) = make_transport_manager_handle(); - let address = + let address = "/dns4/google.com/udp/24928/quic-v1/p2p/12D3KooWKrUnV42yDR7G6DewmgHtFaVCJWLjQRi2G9t5eJD3BvTy" .parse() .unwrap(); - assert!(!handle.supported_transport(&address)); - } + assert!(!handle.supported_transport(&address)); + } - #[cfg(feature = "quic")] - #[tokio::test] - async fn quic_non_terminal_unsupported() { - let (mut handle, _rx) = make_transport_manager_handle(); - handle.supported_transport.insert(SupportedTransport::Quic); + #[cfg(feature = "quic")] + #[tokio::test] + async fn quic_non_terminal_unsupported() { + let (mut handle, _rx) = make_transport_manager_handle(); + handle.supported_transport.insert(SupportedTransport::Quic); - let address = + let address = "/dns4/google.com/udp/24928/quic-v1/p2p/12D3KooWKrUnV42yDR7G6DewmgHtFaVCJWLjQRi2G9t5eJD3BvTy/p2p-circuit" .parse() .unwrap(); - assert!(!handle.supported_transport(&address)); - } - - #[test] - fn transport_not_supported() { - let (handle, _rx) = make_transport_manager_handle(); - - // only peer id (used by Polkadot sometimes) - assert!(!handle.supported_transport( - &Multiaddr::empty().with(Protocol::P2p(Multihash::from(PeerId::random()))) - )); - - // only one transport - assert!(!handle.supported_transport( - &Multiaddr::empty().with(Protocol::Ip4(std::net::Ipv4Addr::new(127, 0, 0, 1))) - )); - - // any udp-based protocol other than quic - assert!(!handle.supported_transport( - &Multiaddr::empty() - .with(Protocol::Ip4(std::net::Ipv4Addr::new(127, 0, 0, 1))) - .with(Protocol::Udp(8888)) - .with(Protocol::Utp) - )); - - // any other protocol other than tcp - assert!(!handle.supported_transport( - &Multiaddr::empty() - .with(Protocol::Ip4(std::net::Ipv4Addr::new(127, 0, 0, 1))) - .with(Protocol::Sctp(8888)) - )); - } - - #[test] - fn zero_addresses_added() { - let (mut handle, _rx) = make_transport_manager_handle(); - handle.supported_transport.insert(SupportedTransport::Tcp); - - assert!( - handle.add_known_address( - &PeerId::random(), - vec![ - Multiaddr::empty() - .with(Protocol::Ip4(std::net::Ipv4Addr::new(127, 0, 0, 1))) - .with(Protocol::Udp(8888)) - .with(Protocol::Utp), - Multiaddr::empty() - .with(Protocol::Ip4(std::net::Ipv4Addr::new(127, 0, 0, 1))) - .with(Protocol::Tcp(8888)) - .with(Protocol::Wss(std::borrow::Cow::Owned("/".to_string()))), - ] - .into_iter() - ) == 0usize - ); - } - - #[tokio::test] - async fn dial_already_connected_peer() { - let (mut handle, _rx) = make_transport_manager_handle(); - handle.supported_transport.insert(SupportedTransport::Tcp); - - let peer = { - let peer = PeerId::random(); - let mut peers = handle.peers.write(); - - peers.insert( - peer, - PeerContext { - state: PeerState::Connected { - record: ConnectionRecord { - address: Multiaddr::empty() - .with(Protocol::Ip4(std::net::Ipv4Addr::new(127, 0, 0, 1))) - .with(Protocol::Tcp(8888)) - .with(Protocol::P2p(Multihash::from(peer))), - connection_id: ConnectionId::from(0), - }, - secondary: None, - }, - - addresses: AddressStore::from_iter( - vec![Multiaddr::empty() - .with(Protocol::Ip4(std::net::Ipv4Addr::new(127, 0, 0, 1))) - .with(Protocol::Tcp(8888)) - .with(Protocol::P2p(Multihash::from(peer)))] - .into_iter(), - ), - }, - ); - drop(peers); - - peer - }; - - match handle.dial(&peer) { - Err(ImmediateDialError::AlreadyConnected) => {} - _ => panic!("invalid return value"), - } - } - - #[tokio::test] - async fn peer_already_being_dialed() { - let (mut handle, _rx) = make_transport_manager_handle(); - handle.supported_transport.insert(SupportedTransport::Tcp); - - let peer = { - let peer = PeerId::random(); - let mut peers = handle.peers.write(); - - peers.insert( - peer, - PeerContext { - state: PeerState::Dialing { - dial_record: ConnectionRecord { - address: Multiaddr::empty() - .with(Protocol::Ip4(std::net::Ipv4Addr::new(127, 0, 0, 1))) - .with(Protocol::Tcp(8888)) - .with(Protocol::P2p(Multihash::from(peer))), - connection_id: ConnectionId::from(0), - }, - }, - - addresses: AddressStore::from_iter( - vec![Multiaddr::empty() - .with(Protocol::Ip4(std::net::Ipv4Addr::new(127, 0, 0, 1))) - .with(Protocol::Tcp(8888)) - .with(Protocol::P2p(Multihash::from(peer)))] - .into_iter(), - ), - }, - ); - drop(peers); - - peer - }; - - match handle.dial(&peer) { - Ok(()) => {} - _ => panic!("invalid return value"), - } - } - - #[tokio::test] - async fn no_address_available_for_peer() { - let (mut handle, _rx) = make_transport_manager_handle(); - handle.supported_transport.insert(SupportedTransport::Tcp); - - let peer = { - let peer = PeerId::random(); - let mut peers = handle.peers.write(); - - peers.insert( - peer, - PeerContext { - state: PeerState::Disconnected { dial_record: None }, - addresses: AddressStore::new(), - }, - ); - drop(peers); - - peer - }; - - let err = handle.dial(&peer).unwrap_err(); - assert!(matches!(err, ImmediateDialError::NoAddressAvailable)); - } - - #[tokio::test] - async fn pending_connection_for_disconnected_peer() { - let (mut handle, mut rx) = make_transport_manager_handle(); - handle.supported_transport.insert(SupportedTransport::Tcp); - - let peer = { - let peer = PeerId::random(); - let mut peers = handle.peers.write(); - - peers.insert( - peer, - PeerContext { - state: PeerState::Disconnected { - dial_record: Some(ConnectionRecord::new( - peer, - Multiaddr::empty() - .with(Protocol::Ip4(std::net::Ipv4Addr::new(127, 0, 0, 1))) - .with(Protocol::Tcp(8888)) - .with(Protocol::P2p(Multihash::from(peer))), - ConnectionId::from(0), - )), - }, - - addresses: AddressStore::from_iter( - vec![Multiaddr::empty() - .with(Protocol::Ip4(std::net::Ipv4Addr::new(127, 0, 0, 1))) - .with(Protocol::Tcp(8888)) - .with(Protocol::P2p(Multihash::from(peer)))] - .into_iter(), - ), - }, - ); - drop(peers); - - peer - }; - - match handle.dial(&peer) { - Ok(()) => {} - _ => panic!("invalid return value"), - } - assert!(rx.try_recv().is_err()); - } - - #[tokio::test] - async fn try_to_dial_self() { - let (mut handle, mut rx) = make_transport_manager_handle(); - handle.supported_transport.insert(SupportedTransport::Tcp); - - let err = handle.dial(&handle.local_peer_id).unwrap_err(); - assert_eq!(err, ImmediateDialError::TriedToDialSelf); - - assert!(rx.try_recv().is_err()); - } - - #[test] - fn is_local_address() { - let (cmd_tx, _cmd_rx) = channel(64); - - let local_peer_id = PeerId::random(); - let specific_bind: Multiaddr = "/ip6/::1/tcp/8888".parse().expect("valid multiaddress"); - let ipv6_bind: Multiaddr = "/ip4/127.0.0.1/tcp/8888".parse().expect("valid multiaddress"); - let wildcard_bind: Multiaddr = "/ip4/0.0.0.0/tcp/9000".parse().unwrap(); - - let listen_addresses = Arc::new(RwLock::new( - [specific_bind, wildcard_bind, ipv6_bind].into_iter().collect(), - )); - println!("{:?}", listen_addresses); - - let handle = TransportManagerHandle { - local_peer_id, - cmd_tx, - peers: Default::default(), - supported_transport: HashSet::new(), - listen_addresses, - public_addresses: PublicAddresses::new(local_peer_id), - }; - - // Exact matches - assert!(handle - .is_local_address(&"/ip4/127.0.0.1/tcp/8888".parse().expect("valid multiaddress"))); - assert!(handle.is_local_address( - &"/ip6/::1/tcp/8888".parse::().expect("valid multiaddress") - )); - - // Peer ID stripping - assert!(handle.is_local_address( - &"/ip6/::1/tcp/8888/p2p/12D3KooWT2ouvz5uMmCvHJGzAGRHiqDts5hzXR7NdoQ27pGdzp9Q" - .parse() - .expect("valid multiaddress") - )); - assert!(handle.is_local_address( - &"/ip4/127.0.0.1/tcp/8888/p2p/12D3KooWT2ouvz5uMmCvHJGzAGRHiqDts5hzXR7NdoQ27pGdzp9Q" - .parse() - .expect("valid multiaddress") - )); - // same address but different peer id - assert!(handle.is_local_address( - &"/ip6/::1/tcp/8888/p2p/12D3KooWPGxxxQiBEBZ52RY31Z2chn4xsDrGCMouZ88izJrak2T1" - .parse::() - .expect("valid multiaddress") - )); - assert!(handle.is_local_address( - &"/ip4/127.0.0.1/tcp/8888/p2p/12D3KooWPGxxxQiBEBZ52RY31Z2chn4xsDrGCMouZ88izJrak2T1" - .parse() - .expect("valid multiaddress") - )); - - // Port collision protection: we listen on 0.0.0.0:9000 and should match any loopback - // address on port 9000. - assert!( - handle.is_local_address(&"/ip4/127.0.0.1/tcp/9000".parse().unwrap()), - "Loopback input should satisfy Wildcard (0.0.0.0) listener" - ); - // 8.8.8.8 is a different IP. - assert!( - !handle.is_local_address(&"/ip4/8.8.8.8/tcp/9000".parse().unwrap()), - "Remote IP with same port should NOT be considered local against Wildcard listener" - ); - - // Port mismatches - assert!( - !handle.is_local_address(&"/ip4/127.0.0.1/tcp/1234".parse().unwrap()), - "Same IP but different port should fail" - ); - assert!( - !handle.is_local_address(&"/ip4/0.0.0.0/tcp/1234".parse().unwrap()), - "Wildcard IP but different port should fail" - ); - assert!(!handle - .is_local_address(&"/ip4/127.0.0.1/tcp/9999".parse().expect("valid multiaddress"))); - assert!(!handle - .is_local_address(&"/ip4/127.0.0.1/tcp/7777".parse().expect("valid multiaddress"))); - } + assert!(!handle.supported_transport(&address)); + } + + #[test] + fn transport_not_supported() { + let (handle, _rx) = make_transport_manager_handle(); + + // only peer id (used by Polkadot sometimes) + assert!(!handle.supported_transport( + &Multiaddr::empty().with(Protocol::P2p(Multihash::from(PeerId::random()))) + )); + + // only one transport + assert!(!handle.supported_transport( + &Multiaddr::empty().with(Protocol::Ip4(std::net::Ipv4Addr::new(127, 0, 0, 1))) + )); + + // any udp-based protocol other than quic + assert!(!handle.supported_transport( + &Multiaddr::empty() + .with(Protocol::Ip4(std::net::Ipv4Addr::new(127, 0, 0, 1))) + .with(Protocol::Udp(8888)) + .with(Protocol::Utp) + )); + + // any other protocol other than tcp + assert!(!handle.supported_transport( + &Multiaddr::empty() + .with(Protocol::Ip4(std::net::Ipv4Addr::new(127, 0, 0, 1))) + .with(Protocol::Sctp(8888)) + )); + } + + #[test] + fn zero_addresses_added() { + let (mut handle, _rx) = make_transport_manager_handle(); + handle.supported_transport.insert(SupportedTransport::Tcp); + + assert!( + handle.add_known_address( + &PeerId::random(), + vec![ + Multiaddr::empty() + .with(Protocol::Ip4(std::net::Ipv4Addr::new(127, 0, 0, 1))) + .with(Protocol::Udp(8888)) + .with(Protocol::Utp), + Multiaddr::empty() + .with(Protocol::Ip4(std::net::Ipv4Addr::new(127, 0, 0, 1))) + .with(Protocol::Tcp(8888)) + .with(Protocol::Wss(std::borrow::Cow::Owned("/".to_string()))), + ] + .into_iter() + ) == 0usize + ); + } + + #[tokio::test] + async fn dial_already_connected_peer() { + let (mut handle, _rx) = make_transport_manager_handle(); + handle.supported_transport.insert(SupportedTransport::Tcp); + + let peer = { + let peer = PeerId::random(); + let mut peers = handle.peers.write(); + + peers.insert( + peer, + PeerContext { + state: PeerState::Connected { + record: ConnectionRecord { + address: Multiaddr::empty() + .with(Protocol::Ip4(std::net::Ipv4Addr::new(127, 0, 0, 1))) + .with(Protocol::Tcp(8888)) + .with(Protocol::P2p(Multihash::from(peer))), + connection_id: ConnectionId::from(0), + }, + secondary: None, + }, + + addresses: AddressStore::from_iter( + vec![Multiaddr::empty() + .with(Protocol::Ip4(std::net::Ipv4Addr::new(127, 0, 0, 1))) + .with(Protocol::Tcp(8888)) + .with(Protocol::P2p(Multihash::from(peer)))] + .into_iter(), + ), + }, + ); + drop(peers); + + peer + }; + + match handle.dial(&peer) { + Err(ImmediateDialError::AlreadyConnected) => {}, + _ => panic!("invalid return value"), + } + } + + #[tokio::test] + async fn peer_already_being_dialed() { + let (mut handle, _rx) = make_transport_manager_handle(); + handle.supported_transport.insert(SupportedTransport::Tcp); + + let peer = { + let peer = PeerId::random(); + let mut peers = handle.peers.write(); + + peers.insert( + peer, + PeerContext { + state: PeerState::Dialing { + dial_record: ConnectionRecord { + address: Multiaddr::empty() + .with(Protocol::Ip4(std::net::Ipv4Addr::new(127, 0, 0, 1))) + .with(Protocol::Tcp(8888)) + .with(Protocol::P2p(Multihash::from(peer))), + connection_id: ConnectionId::from(0), + }, + }, + + addresses: AddressStore::from_iter( + vec![Multiaddr::empty() + .with(Protocol::Ip4(std::net::Ipv4Addr::new(127, 0, 0, 1))) + .with(Protocol::Tcp(8888)) + .with(Protocol::P2p(Multihash::from(peer)))] + .into_iter(), + ), + }, + ); + drop(peers); + + peer + }; + + match handle.dial(&peer) { + Ok(()) => {}, + _ => panic!("invalid return value"), + } + } + + #[tokio::test] + async fn no_address_available_for_peer() { + let (mut handle, _rx) = make_transport_manager_handle(); + handle.supported_transport.insert(SupportedTransport::Tcp); + + let peer = { + let peer = PeerId::random(); + let mut peers = handle.peers.write(); + + peers.insert( + peer, + PeerContext { + state: PeerState::Disconnected { dial_record: None }, + addresses: AddressStore::new(), + }, + ); + drop(peers); + + peer + }; + + let err = handle.dial(&peer).unwrap_err(); + assert!(matches!(err, ImmediateDialError::NoAddressAvailable)); + } + + #[tokio::test] + async fn pending_connection_for_disconnected_peer() { + let (mut handle, mut rx) = make_transport_manager_handle(); + handle.supported_transport.insert(SupportedTransport::Tcp); + + let peer = { + let peer = PeerId::random(); + let mut peers = handle.peers.write(); + + peers.insert( + peer, + PeerContext { + state: PeerState::Disconnected { + dial_record: Some(ConnectionRecord::new( + peer, + Multiaddr::empty() + .with(Protocol::Ip4(std::net::Ipv4Addr::new(127, 0, 0, 1))) + .with(Protocol::Tcp(8888)) + .with(Protocol::P2p(Multihash::from(peer))), + ConnectionId::from(0), + )), + }, + + addresses: AddressStore::from_iter( + vec![Multiaddr::empty() + .with(Protocol::Ip4(std::net::Ipv4Addr::new(127, 0, 0, 1))) + .with(Protocol::Tcp(8888)) + .with(Protocol::P2p(Multihash::from(peer)))] + .into_iter(), + ), + }, + ); + drop(peers); + + peer + }; + + match handle.dial(&peer) { + Ok(()) => {}, + _ => panic!("invalid return value"), + } + assert!(rx.try_recv().is_err()); + } + + #[tokio::test] + async fn try_to_dial_self() { + let (mut handle, mut rx) = make_transport_manager_handle(); + handle.supported_transport.insert(SupportedTransport::Tcp); + + let err = handle.dial(&handle.local_peer_id).unwrap_err(); + assert_eq!(err, ImmediateDialError::TriedToDialSelf); + + assert!(rx.try_recv().is_err()); + } + + #[test] + fn is_local_address() { + let (cmd_tx, _cmd_rx) = channel(64); + + let local_peer_id = PeerId::random(); + let specific_bind: Multiaddr = "/ip6/::1/tcp/8888".parse().expect("valid multiaddress"); + let ipv6_bind: Multiaddr = "/ip4/127.0.0.1/tcp/8888".parse().expect("valid multiaddress"); + let wildcard_bind: Multiaddr = "/ip4/0.0.0.0/tcp/9000".parse().unwrap(); + + let listen_addresses = + Arc::new(RwLock::new([specific_bind, wildcard_bind, ipv6_bind].into_iter().collect())); + println!("{:?}", listen_addresses); + + let handle = TransportManagerHandle { + local_peer_id, + cmd_tx, + peers: Default::default(), + supported_transport: HashSet::new(), + listen_addresses, + public_addresses: PublicAddresses::new(local_peer_id), + }; + + // Exact matches + assert!(handle + .is_local_address(&"/ip4/127.0.0.1/tcp/8888".parse().expect("valid multiaddress"))); + assert!(handle.is_local_address( + &"/ip6/::1/tcp/8888".parse::().expect("valid multiaddress") + )); + + // Peer ID stripping + assert!(handle.is_local_address( + &"/ip6/::1/tcp/8888/p2p/12D3KooWT2ouvz5uMmCvHJGzAGRHiqDts5hzXR7NdoQ27pGdzp9Q" + .parse() + .expect("valid multiaddress") + )); + assert!(handle.is_local_address( + &"/ip4/127.0.0.1/tcp/8888/p2p/12D3KooWT2ouvz5uMmCvHJGzAGRHiqDts5hzXR7NdoQ27pGdzp9Q" + .parse() + .expect("valid multiaddress") + )); + // same address but different peer id + assert!(handle.is_local_address( + &"/ip6/::1/tcp/8888/p2p/12D3KooWPGxxxQiBEBZ52RY31Z2chn4xsDrGCMouZ88izJrak2T1" + .parse::() + .expect("valid multiaddress") + )); + assert!(handle.is_local_address( + &"/ip4/127.0.0.1/tcp/8888/p2p/12D3KooWPGxxxQiBEBZ52RY31Z2chn4xsDrGCMouZ88izJrak2T1" + .parse() + .expect("valid multiaddress") + )); + + // Port collision protection: we listen on 0.0.0.0:9000 and should match any loopback + // address on port 9000. + assert!( + handle.is_local_address(&"/ip4/127.0.0.1/tcp/9000".parse().unwrap()), + "Loopback input should satisfy Wildcard (0.0.0.0) listener" + ); + // 8.8.8.8 is a different IP. + assert!( + !handle.is_local_address(&"/ip4/8.8.8.8/tcp/9000".parse().unwrap()), + "Remote IP with same port should NOT be considered local against Wildcard listener" + ); + + // Port mismatches + assert!( + !handle.is_local_address(&"/ip4/127.0.0.1/tcp/1234".parse().unwrap()), + "Same IP but different port should fail" + ); + assert!( + !handle.is_local_address(&"/ip4/0.0.0.0/tcp/1234".parse().unwrap()), + "Wildcard IP but different port should fail" + ); + assert!(!handle + .is_local_address(&"/ip4/127.0.0.1/tcp/9999".parse().expect("valid multiaddress"))); + assert!(!handle + .is_local_address(&"/ip4/127.0.0.1/tcp/7777".parse().expect("valid multiaddress"))); + } } diff --git a/client/litep2p/src/transport/manager/limits.rs b/client/litep2p/src/transport/manager/limits.rs index 0af49eb1..493e4ebf 100644 --- a/client/litep2p/src/transport/manager/limits.rs +++ b/client/litep2p/src/transport/manager/limits.rs @@ -27,201 +27,201 @@ use std::collections::HashSet; /// Configuration for the connection limits. #[derive(Debug, Clone, Default)] pub struct ConnectionLimitsConfig { - /// Maximum number of incoming connections that can be established. - max_incoming_connections: Option, - /// Maximum number of outgoing connections that can be established. - max_outgoing_connections: Option, + /// Maximum number of incoming connections that can be established. + max_incoming_connections: Option, + /// Maximum number of outgoing connections that can be established. + max_outgoing_connections: Option, } impl ConnectionLimitsConfig { - /// Configures the maximum number of incoming connections that can be established. - pub fn max_incoming_connections(mut self, limit: Option) -> Self { - self.max_incoming_connections = limit; - self - } - - /// Configures the maximum number of outgoing connections that can be established. - pub fn max_outgoing_connections(mut self, limit: Option) -> Self { - self.max_outgoing_connections = limit; - self - } + /// Configures the maximum number of incoming connections that can be established. + pub fn max_incoming_connections(mut self, limit: Option) -> Self { + self.max_incoming_connections = limit; + self + } + + /// Configures the maximum number of outgoing connections that can be established. + pub fn max_outgoing_connections(mut self, limit: Option) -> Self { + self.max_outgoing_connections = limit; + self + } } /// Error type for connection limits. #[derive(Debug, Clone, Copy, PartialEq, Eq)] pub enum ConnectionLimitsError { - /// Maximum number of incoming connections exceeded. - MaxIncomingConnectionsExceeded, - /// Maximum number of outgoing connections exceeded. - MaxOutgoingConnectionsExceeded, + /// Maximum number of incoming connections exceeded. + MaxIncomingConnectionsExceeded, + /// Maximum number of outgoing connections exceeded. + MaxOutgoingConnectionsExceeded, } /// Connection limits. #[derive(Debug, Clone)] pub struct ConnectionLimits { - /// Configuration for the connection limits. - config: ConnectionLimitsConfig, + /// Configuration for the connection limits. + config: ConnectionLimitsConfig, - /// Established incoming connections. - incoming_connections: HashSet, - /// Established outgoing connections. - outgoing_connections: HashSet, + /// Established incoming connections. + incoming_connections: HashSet, + /// Established outgoing connections. + outgoing_connections: HashSet, } impl ConnectionLimits { - /// Creates a new connection limits instance. - pub fn new(config: ConnectionLimitsConfig) -> Self { - let max_incoming_connections = config.max_incoming_connections.unwrap_or(0); - let max_outgoing_connections = config.max_outgoing_connections.unwrap_or(0); - - Self { - config, - incoming_connections: HashSet::with_capacity(max_incoming_connections), - outgoing_connections: HashSet::with_capacity(max_outgoing_connections), - } - } - - /// Called when dialing an address. - /// - /// Returns the number of outgoing connections permitted to be established. - /// It is guaranteed that at least one connection can be established if the method returns `Ok`. - /// The number of available outgoing connections can influence the maximum parallel dials to a - /// single address. - /// - /// If the maximum number of outgoing connections is not set, `Ok(usize::MAX)` is returned. - pub fn on_dial_address(&mut self) -> Result { - if let Some(max_outgoing_connections) = self.config.max_outgoing_connections { - if self.outgoing_connections.len() >= max_outgoing_connections { - return Err(ConnectionLimitsError::MaxOutgoingConnectionsExceeded); - } - - return Ok(max_outgoing_connections - self.outgoing_connections.len()); - } - - Ok(usize::MAX) - } - - /// Called before accepting a new incoming connection. - pub fn on_incoming(&mut self) -> Result<(), ConnectionLimitsError> { - if let Some(max_incoming_connections) = self.config.max_incoming_connections { - if self.incoming_connections.len() >= max_incoming_connections { - return Err(ConnectionLimitsError::MaxIncomingConnectionsExceeded); - } - } - - Ok(()) - } - - /// Called when a new connection is established. - /// - /// Returns an error if the connection cannot be accepted due to connection limits. - pub fn can_accept_connection( - &mut self, - is_listener: bool, - ) -> Result<(), ConnectionLimitsError> { - // Check connection limits. - if is_listener { - if let Some(max_incoming_connections) = self.config.max_incoming_connections { - if self.incoming_connections.len() >= max_incoming_connections { - return Err(ConnectionLimitsError::MaxIncomingConnectionsExceeded); - } - } - } else if let Some(max_outgoing_connections) = self.config.max_outgoing_connections { - if self.outgoing_connections.len() >= max_outgoing_connections { - return Err(ConnectionLimitsError::MaxOutgoingConnectionsExceeded); - } - } - - Ok(()) - } - - /// Accept an established connection. - /// - /// # Note - /// - /// This method should be called after the `Self::can_accept_connection` method - /// to ensure that the connection can be accepted. - pub fn accept_established_connection( - &mut self, - connection_id: ConnectionId, - is_listener: bool, - ) { - if is_listener { - if self.config.max_incoming_connections.is_some() { - self.incoming_connections.insert(connection_id); - } - } else if self.config.max_outgoing_connections.is_some() { - self.outgoing_connections.insert(connection_id); - } - } - - /// Called when a connection is closed. - pub fn on_connection_closed(&mut self, connection_id: ConnectionId) { - self.incoming_connections.remove(&connection_id); - self.outgoing_connections.remove(&connection_id); - } + /// Creates a new connection limits instance. + pub fn new(config: ConnectionLimitsConfig) -> Self { + let max_incoming_connections = config.max_incoming_connections.unwrap_or(0); + let max_outgoing_connections = config.max_outgoing_connections.unwrap_or(0); + + Self { + config, + incoming_connections: HashSet::with_capacity(max_incoming_connections), + outgoing_connections: HashSet::with_capacity(max_outgoing_connections), + } + } + + /// Called when dialing an address. + /// + /// Returns the number of outgoing connections permitted to be established. + /// It is guaranteed that at least one connection can be established if the method returns `Ok`. + /// The number of available outgoing connections can influence the maximum parallel dials to a + /// single address. + /// + /// If the maximum number of outgoing connections is not set, `Ok(usize::MAX)` is returned. + pub fn on_dial_address(&mut self) -> Result { + if let Some(max_outgoing_connections) = self.config.max_outgoing_connections { + if self.outgoing_connections.len() >= max_outgoing_connections { + return Err(ConnectionLimitsError::MaxOutgoingConnectionsExceeded); + } + + return Ok(max_outgoing_connections - self.outgoing_connections.len()); + } + + Ok(usize::MAX) + } + + /// Called before accepting a new incoming connection. + pub fn on_incoming(&mut self) -> Result<(), ConnectionLimitsError> { + if let Some(max_incoming_connections) = self.config.max_incoming_connections { + if self.incoming_connections.len() >= max_incoming_connections { + return Err(ConnectionLimitsError::MaxIncomingConnectionsExceeded); + } + } + + Ok(()) + } + + /// Called when a new connection is established. + /// + /// Returns an error if the connection cannot be accepted due to connection limits. + pub fn can_accept_connection( + &mut self, + is_listener: bool, + ) -> Result<(), ConnectionLimitsError> { + // Check connection limits. + if is_listener { + if let Some(max_incoming_connections) = self.config.max_incoming_connections { + if self.incoming_connections.len() >= max_incoming_connections { + return Err(ConnectionLimitsError::MaxIncomingConnectionsExceeded); + } + } + } else if let Some(max_outgoing_connections) = self.config.max_outgoing_connections { + if self.outgoing_connections.len() >= max_outgoing_connections { + return Err(ConnectionLimitsError::MaxOutgoingConnectionsExceeded); + } + } + + Ok(()) + } + + /// Accept an established connection. + /// + /// # Note + /// + /// This method should be called after the `Self::can_accept_connection` method + /// to ensure that the connection can be accepted. + pub fn accept_established_connection( + &mut self, + connection_id: ConnectionId, + is_listener: bool, + ) { + if is_listener { + if self.config.max_incoming_connections.is_some() { + self.incoming_connections.insert(connection_id); + } + } else if self.config.max_outgoing_connections.is_some() { + self.outgoing_connections.insert(connection_id); + } + } + + /// Called when a connection is closed. + pub fn on_connection_closed(&mut self, connection_id: ConnectionId) { + self.incoming_connections.remove(&connection_id); + self.outgoing_connections.remove(&connection_id); + } } #[cfg(test)] mod tests { - use super::*; - use crate::types::ConnectionId; - - #[test] - fn connection_limits() { - let config = ConnectionLimitsConfig::default() - .max_incoming_connections(Some(3)) - .max_outgoing_connections(Some(2)); - let mut limits = ConnectionLimits::new(config); - - let connection_id_in_1 = ConnectionId::random(); - let connection_id_in_2 = ConnectionId::random(); - let connection_id_out_1 = ConnectionId::random(); - let connection_id_out_2 = ConnectionId::random(); - let connection_id_in_3 = ConnectionId::random(); - - // Establish incoming connection. - assert!(limits.can_accept_connection(true).is_ok()); - limits.accept_established_connection(connection_id_in_1, true); - assert_eq!(limits.incoming_connections.len(), 1); - - assert!(limits.can_accept_connection(true).is_ok()); - limits.accept_established_connection(connection_id_in_2, true); - assert_eq!(limits.incoming_connections.len(), 2); - - assert!(limits.can_accept_connection(true).is_ok()); - limits.accept_established_connection(connection_id_in_3, true); - assert_eq!(limits.incoming_connections.len(), 3); - - assert_eq!( - limits.can_accept_connection(true).unwrap_err(), - ConnectionLimitsError::MaxIncomingConnectionsExceeded - ); - assert_eq!(limits.incoming_connections.len(), 3); - - // Establish outgoing connection. - assert!(limits.can_accept_connection(false).is_ok()); - limits.accept_established_connection(connection_id_out_1, false); - assert_eq!(limits.incoming_connections.len(), 3); - assert_eq!(limits.outgoing_connections.len(), 1); - - assert!(limits.can_accept_connection(false).is_ok()); - limits.accept_established_connection(connection_id_out_2, false); - assert_eq!(limits.incoming_connections.len(), 3); - assert_eq!(limits.outgoing_connections.len(), 2); - - assert_eq!( - limits.can_accept_connection(false).unwrap_err(), - ConnectionLimitsError::MaxOutgoingConnectionsExceeded - ); - - // Close connections with peer a. - limits.on_connection_closed(connection_id_in_1); - assert_eq!(limits.incoming_connections.len(), 2); - assert_eq!(limits.outgoing_connections.len(), 2); - - limits.on_connection_closed(connection_id_out_1); - assert_eq!(limits.incoming_connections.len(), 2); - assert_eq!(limits.outgoing_connections.len(), 1); - } + use super::*; + use crate::types::ConnectionId; + + #[test] + fn connection_limits() { + let config = ConnectionLimitsConfig::default() + .max_incoming_connections(Some(3)) + .max_outgoing_connections(Some(2)); + let mut limits = ConnectionLimits::new(config); + + let connection_id_in_1 = ConnectionId::random(); + let connection_id_in_2 = ConnectionId::random(); + let connection_id_out_1 = ConnectionId::random(); + let connection_id_out_2 = ConnectionId::random(); + let connection_id_in_3 = ConnectionId::random(); + + // Establish incoming connection. + assert!(limits.can_accept_connection(true).is_ok()); + limits.accept_established_connection(connection_id_in_1, true); + assert_eq!(limits.incoming_connections.len(), 1); + + assert!(limits.can_accept_connection(true).is_ok()); + limits.accept_established_connection(connection_id_in_2, true); + assert_eq!(limits.incoming_connections.len(), 2); + + assert!(limits.can_accept_connection(true).is_ok()); + limits.accept_established_connection(connection_id_in_3, true); + assert_eq!(limits.incoming_connections.len(), 3); + + assert_eq!( + limits.can_accept_connection(true).unwrap_err(), + ConnectionLimitsError::MaxIncomingConnectionsExceeded + ); + assert_eq!(limits.incoming_connections.len(), 3); + + // Establish outgoing connection. + assert!(limits.can_accept_connection(false).is_ok()); + limits.accept_established_connection(connection_id_out_1, false); + assert_eq!(limits.incoming_connections.len(), 3); + assert_eq!(limits.outgoing_connections.len(), 1); + + assert!(limits.can_accept_connection(false).is_ok()); + limits.accept_established_connection(connection_id_out_2, false); + assert_eq!(limits.incoming_connections.len(), 3); + assert_eq!(limits.outgoing_connections.len(), 2); + + assert_eq!( + limits.can_accept_connection(false).unwrap_err(), + ConnectionLimitsError::MaxOutgoingConnectionsExceeded + ); + + // Close connections with peer a. + limits.on_connection_closed(connection_id_in_1); + assert_eq!(limits.incoming_connections.len(), 2); + assert_eq!(limits.outgoing_connections.len(), 2); + + limits.on_connection_closed(connection_id_out_1); + assert_eq!(limits.incoming_connections.len(), 2); + assert_eq!(limits.outgoing_connections.len(), 1); + } } diff --git a/client/litep2p/src/transport/manager/mod.rs b/client/litep2p/src/transport/manager/mod.rs index 869786c7..adc9894c 100644 --- a/client/litep2p/src/transport/manager/mod.rs +++ b/client/litep2p/src/transport/manager/mod.rs @@ -19,23 +19,23 @@ // DEALINGS IN THE SOFTWARE. use crate::{ - addresses::PublicAddresses, - codec::ProtocolCodec, - crypto::dilithium::Keypair, - error::{AddressError, DialError, Error}, - executor::Executor, - protocol::{InnerTransportEvent, TransportService}, - transport::{ - manager::{ - address::AddressRecord, - handle::InnerTransportManagerCommand, - peer_state::{ConnectionRecord, PeerState, StateDialResult}, - types::PeerContext, - }, - Endpoint, Transport, TransportEvent, - }, - types::{protocol::ProtocolName, ConnectionId}, - BandwidthSink, PeerId, + addresses::PublicAddresses, + codec::ProtocolCodec, + crypto::dilithium::Keypair, + error::{AddressError, DialError, Error}, + executor::Executor, + protocol::{InnerTransportEvent, TransportService}, + transport::{ + manager::{ + address::AddressRecord, + handle::InnerTransportManagerCommand, + peer_state::{ConnectionRecord, PeerState, StateDialResult}, + types::PeerContext, + }, + Endpoint, Transport, TransportEvent, + }, + types::{protocol::ProtocolName, ConnectionId}, + BandwidthSink, PeerId, }; use address::{scores, AddressStore}; @@ -47,14 +47,14 @@ use parking_lot::RwLock; use tokio::sync::mpsc::{channel, Receiver, Sender}; use std::{ - collections::{HashMap, HashSet}, - pin::Pin, - sync::{ - atomic::{AtomicUsize, Ordering}, - Arc, - }, - task::{Context, Poll}, - time::Duration, + collections::{HashMap, HashSet}, + pin::Pin, + sync::{ + atomic::{AtomicUsize, Ordering}, + Arc, + }, + task::{Context, Poll}, + time::Duration, }; pub use crate::protocol::SubstreamKeepAlive; @@ -77,3762 +77,3533 @@ const LOG_TARGET: &str = "litep2p::transport-manager"; /// The connection established result. #[derive(Debug, Clone, Copy, Eq, PartialEq)] enum ConnectionEstablishedResult { - /// Accept connection and inform `Litep2p` about the connection. - Accept, + /// Accept connection and inform `Litep2p` about the connection. + Accept, - /// Reject connection. - Reject, + /// Reject connection. + Reject, } /// [`crate::transport::manager::TransportManager`] events. pub enum TransportManagerEvent { - /// Connection closed to remote peer. - ConnectionClosed { - /// Peer ID. - peer: PeerId, - - /// Connection ID. - connection: ConnectionId, - }, + /// Connection closed to remote peer. + ConnectionClosed { + /// Peer ID. + peer: PeerId, + + /// Connection ID. + connection: ConnectionId, + }, } // Protocol context. #[derive(Debug, Clone)] pub struct ProtocolContext { - /// Codec used by the protocol. - pub codec: ProtocolCodec, + /// Codec used by the protocol. + pub codec: ProtocolCodec, - /// TX channel for sending events to protocol. - pub tx: Sender, + /// TX channel for sending events to protocol. + pub tx: Sender, - /// Fallback names for the protocol. - pub fallback_names: Vec, + /// Fallback names for the protocol. + pub fallback_names: Vec, - /// Whether this protocol existing substreams should keep connection alive. - pub keep_alive: SubstreamKeepAlive, + /// Whether this protocol existing substreams should keep connection alive. + pub keep_alive: SubstreamKeepAlive, } impl ProtocolContext { - /// Create new [`ProtocolContext`]. - fn new( - codec: ProtocolCodec, - tx: Sender, - fallback_names: Vec, - keep_alive: SubstreamKeepAlive, - ) -> Self { - Self { - tx, - codec, - fallback_names, - keep_alive, - } - } + /// Create new [`ProtocolContext`]. + fn new( + codec: ProtocolCodec, + tx: Sender, + fallback_names: Vec, + keep_alive: SubstreamKeepAlive, + ) -> Self { + Self { tx, codec, fallback_names, keep_alive } + } } /// Transport context for enabled transports. struct TransportContext { - /// Polling index. - index: usize, + /// Polling index. + index: usize, - /// Registered transports. - transports: IndexMap>>, + /// Registered transports. + transports: IndexMap>>, } impl TransportContext { - /// Create new [`TransportContext`]. - pub fn new() -> Self { - Self { - index: 0usize, - transports: IndexMap::new(), - } - } - - /// Get an iterator of supported transports. - pub fn keys(&self) -> impl Iterator { - self.transports.keys() - } - - /// Get mutable access to transport. - pub fn get_mut( - &mut self, - key: &SupportedTransport, - ) -> Option<&mut Box>> { - self.transports.get_mut(key) - } - - /// Register `transport` to `TransportContext`. - pub fn register_transport( - &mut self, - name: SupportedTransport, - transport: Box>, - ) { - assert!(self.transports.insert(name, transport).is_none()); - } + /// Create new [`TransportContext`]. + pub fn new() -> Self { + Self { index: 0usize, transports: IndexMap::new() } + } + + /// Get an iterator of supported transports. + pub fn keys(&self) -> impl Iterator { + self.transports.keys() + } + + /// Get mutable access to transport. + pub fn get_mut( + &mut self, + key: &SupportedTransport, + ) -> Option<&mut Box>> { + self.transports.get_mut(key) + } + + /// Register `transport` to `TransportContext`. + pub fn register_transport( + &mut self, + name: SupportedTransport, + transport: Box>, + ) { + assert!(self.transports.insert(name, transport).is_none()); + } } impl Stream for TransportContext { - type Item = (SupportedTransport, TransportEvent); - - fn poll_next(mut self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll> { - if self.transports.is_empty() { - // Terminate if we don't have any transports installed. - return Poll::Ready(None); - } - - let len = self.transports.len(); - for _ in 0..len { - let current = self.index; - self.index = (current + 1) % len; - let (key, stream) = self.transports.get_index_mut(current).expect("transport to exist"); - match stream.poll_next_unpin(cx) { - Poll::Pending => {} - Poll::Ready(None) => { - return Poll::Ready(None); - } - Poll::Ready(Some(event)) => { - let event = Some((*key, event)); - return Poll::Ready(event); - } - } - } - - Poll::Pending - } + type Item = (SupportedTransport, TransportEvent); + + fn poll_next(mut self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll> { + if self.transports.is_empty() { + // Terminate if we don't have any transports installed. + return Poll::Ready(None); + } + + let len = self.transports.len(); + for _ in 0..len { + let current = self.index; + self.index = (current + 1) % len; + let (key, stream) = self.transports.get_index_mut(current).expect("transport to exist"); + match stream.poll_next_unpin(cx) { + Poll::Pending => {}, + Poll::Ready(None) => { + return Poll::Ready(None); + }, + Poll::Ready(Some(event)) => { + let event = Some((*key, event)); + return Poll::Ready(event); + }, + } + } + + Poll::Pending + } } /// Litep2p connection manager. pub struct TransportManager { - /// Local peer ID. - local_peer_id: PeerId, + /// Local peer ID. + local_peer_id: PeerId, - /// Keypair. - keypair: Keypair, + /// Keypair. + keypair: Keypair, - /// Bandwidth sink. - bandwidth_sink: BandwidthSink, + /// Bandwidth sink. + bandwidth_sink: BandwidthSink, - /// Installed protocols. - protocols: HashMap, + /// Installed protocols. + protocols: HashMap, - /// All names (main and fallback(s)) of the installed protocols. - protocol_names: HashSet, + /// All names (main and fallback(s)) of the installed protocols. + protocol_names: HashSet, - /// Listen addresses. - listen_addresses: Arc>>, + /// Listen addresses. + listen_addresses: Arc>>, - /// Listen addresses. - public_addresses: PublicAddresses, + /// Listen addresses. + public_addresses: PublicAddresses, - /// Next connection ID. - next_connection_id: Arc, + /// Next connection ID. + next_connection_id: Arc, - /// Next substream ID. - next_substream_id: Arc, + /// Next substream ID. + next_substream_id: Arc, - /// Installed transports. - transports: TransportContext, + /// Installed transports. + transports: TransportContext, - /// Peers - peers: Arc>>, + /// Peers + peers: Arc>>, - /// Handle to [`crate::transport::manager::TransportManager`]. - transport_manager_handle: TransportManagerHandle, + /// Handle to [`crate::transport::manager::TransportManager`]. + transport_manager_handle: TransportManagerHandle, - /// RX channel for receiving events from installed transports. - event_rx: Receiver, + /// RX channel for receiving events from installed transports. + event_rx: Receiver, - /// RX channel for receiving commands from installed protocols. - cmd_rx: Receiver, + /// RX channel for receiving commands from installed protocols. + cmd_rx: Receiver, - /// TX channel for transport events that is given to installed transports. - event_tx: Sender, + /// TX channel for transport events that is given to installed transports. + event_tx: Sender, - /// Pending connections. - pending_connections: HashMap, + /// Pending connections. + pending_connections: HashMap, - /// Connection limits. - connection_limits: limits::ConnectionLimits, + /// Connection limits. + connection_limits: limits::ConnectionLimits, - /// Opening connections errors. - opening_errors: HashMap>, + /// Opening connections errors. + opening_errors: HashMap>, - /// Pending accept futures with associated connection information. - pending_accept: FuturesUnordered)>>, + /// Pending accept futures with associated connection information. + pending_accept: FuturesUnordered)>>, } /// Builder for [`crate::transport::manager::TransportManager`]. pub struct TransportManagerBuilder { - /// Keypair. - keypair: Option, + /// Keypair. + keypair: Option, - /// Supported transports. - supported_transports: HashSet, + /// Supported transports. + supported_transports: HashSet, - /// Bandwidth sink. - bandwidth_sink: Option, + /// Bandwidth sink. + bandwidth_sink: Option, - /// Connection limits config. - connection_limits_config: limits::ConnectionLimitsConfig, + /// Connection limits config. + connection_limits_config: limits::ConnectionLimitsConfig, } impl Default for TransportManagerBuilder { - fn default() -> Self { - Self::new() - } + fn default() -> Self { + Self::new() + } } impl TransportManagerBuilder { - /// Create new [`crate::transport::manager::TransportManagerBuilder`]. - pub fn new() -> Self { - Self { - keypair: None, - supported_transports: HashSet::new(), - bandwidth_sink: None, - connection_limits_config: limits::ConnectionLimitsConfig::default(), - } - } - - /// Set the keypair - pub fn with_keypair(mut self, keypair: Keypair) -> Self { - self.keypair = Some(keypair); - self - } - - /// Set the supported transports - pub fn with_supported_transports( - mut self, - supported_transports: HashSet, - ) -> Self { - self.supported_transports = supported_transports; - self - } - - /// Set the bandwidth sink - pub fn with_bandwidth_sink(mut self, bandwidth_sink: BandwidthSink) -> Self { - self.bandwidth_sink = Some(bandwidth_sink); - self - } - - /// Set connection limits configuration. - pub fn with_connection_limits_config( - mut self, - connection_limits_config: limits::ConnectionLimitsConfig, - ) -> Self { - self.connection_limits_config = connection_limits_config; - self - } - - /// Build [`TransportManager`]. - pub fn build(self) -> TransportManager { - let keypair = self.keypair.unwrap_or_else(Keypair::generate); - let local_peer_id = PeerId::from_public_key(&keypair.public().into()); - let peers = Arc::new(RwLock::new(HashMap::new())); - let (cmd_tx, cmd_rx) = channel(256); - let (event_tx, event_rx) = channel(256); - let listen_addresses = Arc::new(RwLock::new(HashSet::new())); - let public_addresses = PublicAddresses::new(local_peer_id); - - let handle = TransportManagerHandle::new( - local_peer_id, - peers.clone(), - cmd_tx, - self.supported_transports, - listen_addresses.clone(), - public_addresses.clone(), - ); - - TransportManager { - local_peer_id, - keypair, - bandwidth_sink: self.bandwidth_sink.unwrap_or_else(BandwidthSink::new), - protocols: HashMap::new(), - protocol_names: HashSet::new(), - listen_addresses, - public_addresses, - next_connection_id: Arc::new(AtomicUsize::new(0usize)), - next_substream_id: Arc::new(AtomicUsize::new(0usize)), - transports: TransportContext::new(), - peers, - transport_manager_handle: handle, - event_rx, - cmd_rx, - event_tx, - pending_connections: HashMap::new(), - connection_limits: limits::ConnectionLimits::new(self.connection_limits_config), - opening_errors: HashMap::new(), - pending_accept: FuturesUnordered::new(), - } - } + /// Create new [`crate::transport::manager::TransportManagerBuilder`]. + pub fn new() -> Self { + Self { + keypair: None, + supported_transports: HashSet::new(), + bandwidth_sink: None, + connection_limits_config: limits::ConnectionLimitsConfig::default(), + } + } + + /// Set the keypair + pub fn with_keypair(mut self, keypair: Keypair) -> Self { + self.keypair = Some(keypair); + self + } + + /// Set the supported transports + pub fn with_supported_transports( + mut self, + supported_transports: HashSet, + ) -> Self { + self.supported_transports = supported_transports; + self + } + + /// Set the bandwidth sink + pub fn with_bandwidth_sink(mut self, bandwidth_sink: BandwidthSink) -> Self { + self.bandwidth_sink = Some(bandwidth_sink); + self + } + + /// Set connection limits configuration. + pub fn with_connection_limits_config( + mut self, + connection_limits_config: limits::ConnectionLimitsConfig, + ) -> Self { + self.connection_limits_config = connection_limits_config; + self + } + + /// Build [`TransportManager`]. + pub fn build(self) -> TransportManager { + let keypair = self.keypair.unwrap_or_else(Keypair::generate); + let local_peer_id = PeerId::from_public_key(&keypair.public().into()); + let peers = Arc::new(RwLock::new(HashMap::new())); + let (cmd_tx, cmd_rx) = channel(256); + let (event_tx, event_rx) = channel(256); + let listen_addresses = Arc::new(RwLock::new(HashSet::new())); + let public_addresses = PublicAddresses::new(local_peer_id); + + let handle = TransportManagerHandle::new( + local_peer_id, + peers.clone(), + cmd_tx, + self.supported_transports, + listen_addresses.clone(), + public_addresses.clone(), + ); + + TransportManager { + local_peer_id, + keypair, + bandwidth_sink: self.bandwidth_sink.unwrap_or_else(BandwidthSink::new), + protocols: HashMap::new(), + protocol_names: HashSet::new(), + listen_addresses, + public_addresses, + next_connection_id: Arc::new(AtomicUsize::new(0usize)), + next_substream_id: Arc::new(AtomicUsize::new(0usize)), + transports: TransportContext::new(), + peers, + transport_manager_handle: handle, + event_rx, + cmd_rx, + event_tx, + pending_connections: HashMap::new(), + connection_limits: limits::ConnectionLimits::new(self.connection_limits_config), + opening_errors: HashMap::new(), + pending_accept: FuturesUnordered::new(), + } + } } impl TransportManager { - /// Get iterator to installed protocols. - pub fn protocols(&self) -> impl Iterator { - self.protocols.keys() - } - - /// Get iterator to installed transports - pub fn installed_transports(&self) -> impl Iterator { - self.transports.keys() - } - - /// Get next connection ID. - fn next_connection_id(&self) -> ConnectionId { - let connection_id = self.next_connection_id.fetch_add(1usize, Ordering::Relaxed); - - ConnectionId::from(connection_id) - } - - /// Get the transport manager handle - pub fn transport_manager_handle(&self) -> TransportManagerHandle { - self.transport_manager_handle.clone() - } - - /// Register protocol to the [`crate::transport::manager::TransportManager`]. - /// - /// This allocates new context for the protocol and returns a handle - /// which the protocol can use the interact with the transport subsystem. - pub fn register_protocol( - &mut self, - protocol: ProtocolName, - fallback_names: Vec, - codec: ProtocolCodec, - keep_alive_timeout: Duration, - substream_keep_alive: SubstreamKeepAlive, - ) -> TransportService { - assert!(!self.protocol_names.contains(&protocol)); - - for fallback in &fallback_names { - if self.protocol_names.contains(fallback) { - panic!("duplicate fallback protocol given: {fallback:?}"); - } - } - - let (service, sender) = TransportService::new( - self.local_peer_id, - protocol.clone(), - fallback_names.clone(), - self.next_substream_id.clone(), - self.transport_manager_handle(), - keep_alive_timeout, - substream_keep_alive, - ); - - self.protocols.insert( - protocol.clone(), - ProtocolContext::new(codec, sender, fallback_names.clone(), substream_keep_alive), - ); - self.protocol_names.insert(protocol); - self.protocol_names.extend(fallback_names); - - service - } - - /// Unregister a protocol in response of the user dropping the protocol handle. - fn unregister_protocol(&mut self, protocol: ProtocolName) { - let Some(context) = self.protocols.remove(&protocol) else { - tracing::error!(target: LOG_TARGET, ?protocol, "Cannot unregister protocol, not registered"); - return; - }; - - for fallback in &context.fallback_names { - if !self.protocol_names.remove(fallback) { - tracing::error!(target: LOG_TARGET, ?fallback, ?protocol, "Cannot unregister fallback protocol, not registered"); - } - } - - tracing::info!( - target: LOG_TARGET, - ?protocol, - "Protocol fully unregistered" - ); - } - - /// Acquire `TransportHandle`. - pub fn transport_handle(&self, executor: Arc) -> TransportHandle { - TransportHandle { - tx: self.event_tx.clone(), - executor, - keypair: self.keypair.clone(), - protocols: self.protocols.clone(), - bandwidth_sink: self.bandwidth_sink.clone(), - next_substream_id: self.next_substream_id.clone(), - next_connection_id: self.next_connection_id.clone(), - } - } - - /// Register transport to `TransportManager`. - pub(crate) fn register_transport( - &mut self, - name: SupportedTransport, - transport: Box>, - ) { - tracing::debug!(target: LOG_TARGET, transport = ?name, "register transport"); - - self.transports.register_transport(name, transport); - self.transport_manager_handle.register_transport(name); - } - - /// Get the list of public addresses of the node. - pub(crate) fn public_addresses(&self) -> PublicAddresses { - self.public_addresses.clone() - } - - /// Register local listen address. - pub fn register_listen_address(&mut self, address: Multiaddr) { - assert!(!address.iter().any(|protocol| std::matches!(protocol, Protocol::P2p(_)))); - - let mut listen_addresses = self.listen_addresses.write(); - - listen_addresses.insert(address.clone()); - listen_addresses.insert(address.with(Protocol::P2p( - Multihash::from_bytes(&self.local_peer_id.to_bytes()).unwrap(), - ))); - } - - /// Add one or more known addresses for `peer`. - pub fn add_known_address( - &mut self, - peer: PeerId, - address: impl Iterator, - ) -> usize { - self.transport_manager_handle.add_known_address(&peer, address) - } - - /// Return multiple addresses to dial on supported protocols. - fn supported_transports_addresses( - addresses: &[Multiaddr], - ) -> HashMap> { - let mut transports = HashMap::>::new(); - - for address in addresses.iter().cloned() { - #[cfg(feature = "quic")] - if address.iter().any(|p| std::matches!(&p, Protocol::QuicV1)) { - transports.entry(SupportedTransport::Quic).or_default().push(address); - continue; - } - - #[cfg(feature = "websocket")] - if address.iter().any(|p| std::matches!(&p, Protocol::Ws(_) | Protocol::Wss(_))) { - transports.entry(SupportedTransport::WebSocket).or_default().push(address); - continue; - } - - transports.entry(SupportedTransport::Tcp).or_default().push(address); - } - - transports - } - - /// Dial peer using `PeerId`. - /// - /// Returns an error if the peer is unknown or the peer is already connected. - pub async fn dial(&mut self, peer: PeerId) -> crate::Result<()> { - // Don't alter the peer state if there's no capacity to dial. - let available_capacity = self.connection_limits.on_dial_address()?; - - if peer == self.local_peer_id { - return Err(Error::TriedToDialSelf); - } - let mut peers = self.peers.write(); - - let context = peers.entry(peer).or_default(); - - // Check if dialing is possible before allocating addresses. - match context.state.can_dial() { - StateDialResult::AlreadyConnected => return Err(Error::AlreadyConnected), - StateDialResult::DialingInProgress => return Ok(()), - StateDialResult::Ok => {} - }; - - // The addresses are sorted by score and contain the remote peer ID. - // We double checked above that the remote peer is not the local peer. - // Limit addresses by the available connection capacity. The transport layer - // handles dial concurrency via `max_parallel_dials`. - let dial_addresses = context.addresses.addresses(available_capacity); - if dial_addresses.is_empty() { - return Err(Error::NoAddressAvailable(peer)); - } - let connection_id = self.next_connection_id(); - - tracing::debug!( - target: LOG_TARGET, - ?connection_id, - addresses = ?dial_addresses, - "dial remote peer", - ); - - let transports = Self::supported_transports_addresses(&dial_addresses); - - // Dialing addresses will succeed because the `context.state.can_dial()` returned `Ok`. - let result = context.state.dial_addresses( - connection_id, - dial_addresses.iter().cloned().collect(), - transports.keys().cloned().collect(), - ); - if result != StateDialResult::Ok { - tracing::warn!( - target: LOG_TARGET, - ?peer, - ?connection_id, - state = ?context.state, - "invalid state for dialing", - ); - } - - for (transport, addresses) in transports { - if addresses.is_empty() { - continue; - } - - let Some(installed_transport) = self.transports.get_mut(&transport) else { - continue; - }; - - installed_transport.open(connection_id, addresses)?; - } - - self.pending_connections.insert(connection_id, peer); - - Ok(()) - } - - /// Dial peer using `Multiaddr`. - /// - /// Returns an error if address it not valid. - pub async fn dial_address(&mut self, address: Multiaddr) -> crate::Result<()> { - self.connection_limits.on_dial_address()?; - - let address_record = AddressRecord::from_multiaddr(address) - .ok_or(Error::AddressError(AddressError::PeerIdMissing))?; - - if self.listen_addresses.read().contains(address_record.as_ref()) { - return Err(Error::TriedToDialSelf); - } - - tracing::debug!(target: LOG_TARGET, address = ?address_record.address(), "dial address"); - - let mut protocol_stack = address_record.as_ref().iter(); - match protocol_stack - .next() - .ok_or_else(|| Error::TransportNotSupported(address_record.address().clone()))? - { - Protocol::Ip4(_) | Protocol::Ip6(_) => {} - Protocol::Dns(_) | Protocol::Dns4(_) | Protocol::Dns6(_) => {} - transport => { - tracing::error!( - target: LOG_TARGET, - ?transport, - "invalid transport, expected `ip4`/`ip6`" - ); - return Err(Error::TransportNotSupported( - address_record.address().clone(), - )); - } - }; - - let supported_transport = match protocol_stack - .next() - .ok_or_else(|| Error::TransportNotSupported(address_record.address().clone()))? - { - Protocol::Tcp(_) => match protocol_stack.next() { - #[cfg(feature = "websocket")] - Some(Protocol::Ws(_)) | Some(Protocol::Wss(_)) => SupportedTransport::WebSocket, - Some(Protocol::P2p(_)) => SupportedTransport::Tcp, - _ => - return Err(Error::TransportNotSupported( - address_record.address().clone(), - )), - }, - #[cfg(feature = "quic")] - Protocol::Udp(_) => match protocol_stack - .next() - .ok_or_else(|| Error::TransportNotSupported(address_record.address().clone()))? - { - Protocol::QuicV1 => SupportedTransport::Quic, - _ => { - tracing::debug!(target: LOG_TARGET, address = ?address_record.address(), "expected `quic-v1`"); - return Err(Error::TransportNotSupported( - address_record.address().clone(), - )); - } - }, - protocol => { - tracing::error!( - target: LOG_TARGET, - ?protocol, - "invalid protocol" - ); - - return Err(Error::TransportNotSupported( - address_record.address().clone(), - )); - } - }; - - // when constructing `AddressRecord`, `PeerId` was verified to be part of the address - let remote_peer_id = - PeerId::try_from_multiaddr(address_record.address()).expect("`PeerId` to exist"); - - // set connection id for the address record and put peer into `Dialing` state - let connection_id = self.next_connection_id(); - let dial_record = ConnectionRecord { - address: address_record.address().clone(), - connection_id, - }; - - { - let mut peers = self.peers.write(); - - let context = peers.entry(remote_peer_id).or_default(); - - // Keep the provided record around for possible future dials. - context.addresses.insert(address_record.clone()); - - match context.state.dial_single_address(dial_record) { - StateDialResult::AlreadyConnected => return Err(Error::AlreadyConnected), - StateDialResult::DialingInProgress => return Ok(()), - StateDialResult::Ok => {} - }; - } - - self.transports - .get_mut(&supported_transport) - .ok_or(Error::TransportNotSupported( - address_record.address().clone(), - ))? - .dial(connection_id, address_record.address().clone())?; - self.pending_connections.insert(connection_id, remote_peer_id); - - Ok(()) - } - - // Update the address on a dial failure. - fn update_address_on_dial_failure(&mut self, address: Multiaddr, error: &DialError) { - let mut peers = self.peers.write(); - - let score = AddressStore::error_score(error); - - // Extract the peer ID at this point to give `NegotiationError::PeerIdMismatch` a chance to - // propagate. - let peer_id = match address.iter().last() { - Some(Protocol::P2p(hash)) => PeerId::from_multihash(hash).ok(), - _ => None, - }; - let Some(peer_id) = peer_id else { - return; - }; - - // We need a valid context for this peer to keep track of failed addresses. - let context = peers.entry(peer_id).or_default(); - context.addresses.insert(AddressRecord::new(&peer_id, address.clone(), score)); - } - - /// Handle dial failure. - /// - /// The main purpose of this function is to advance the internal `PeerState`. - fn on_dial_failure(&mut self, connection_id: ConnectionId) -> crate::Result<()> { - tracing::trace!(target: LOG_TARGET, ?connection_id, "on dial failure"); - - let peer = self.pending_connections.remove(&connection_id).ok_or_else(|| { - tracing::error!( - target: LOG_TARGET, - ?connection_id, - "dial failed for a connection that doesn't exist", - ); - Error::InvalidState - })?; - - let mut peers = self.peers.write(); - let context = peers.entry(peer).or_default(); - let previous_state = context.state.clone(); - - if !context.state.on_dial_failure(connection_id) { - tracing::warn!( - target: LOG_TARGET, - ?peer, - ?connection_id, - state = ?context.state, - "invalid state for dial failure", - ); - } else { - tracing::trace!( - target: LOG_TARGET, - ?peer, - ?connection_id, - ?previous_state, - state = ?context.state, - "on dial failure completed" - ); - } - - Ok(()) - } - - fn on_pending_incoming_connection(&mut self) -> crate::Result<()> { - self.connection_limits.on_incoming()?; - Ok(()) - } - - /// Handle closed connection. - fn on_connection_closed( - &mut self, - peer: PeerId, - connection_id: ConnectionId, - ) -> Option { - tracing::trace!(target: LOG_TARGET, ?peer, ?connection_id, "connection closed"); - - self.connection_limits.on_connection_closed(connection_id); - - let mut peers = self.peers.write(); - let context = peers.entry(peer).or_default(); - - let previous_state = context.state.clone(); - let connection_closed = context.state.on_connection_closed(connection_id); - - if context.state == previous_state { - tracing::warn!( - target: LOG_TARGET, - ?peer, - ?connection_id, - state = ?context.state, - "invalid state for a closed connection", - ); - } else { - tracing::trace!( - target: LOG_TARGET, - ?peer, - ?connection_id, - ?previous_state, - state = ?context.state, - "on connection closed completed" - ); - } - - connection_closed.then_some(TransportEvent::ConnectionClosed { - peer, - connection_id, - }) - } - - /// Update the address on a connection established. - fn update_address_on_connection_established(&mut self, peer: PeerId, endpoint: &Endpoint) { - // The connection can be inbound or outbound. - // For the inbound connection type, in most cases, the remote peer dialed - // with an ephemeral port which it might not be listening on. - // Therefore, we only insert the address into the store if we're the dialer. - if endpoint.is_listener() { - return; - } - - let mut peers = self.peers.write(); - - let record = AddressRecord::new( - &peer, - endpoint.address().clone(), - scores::CONNECTION_ESTABLISHED, - ); - - let context = peers.entry(peer).or_default(); - context.addresses.insert(record); - } - - fn on_connection_established( - &mut self, - peer: PeerId, - endpoint: &Endpoint, - ) -> crate::Result { - self.update_address_on_connection_established(peer, endpoint); - - if let Some(dialed_peer) = self.pending_connections.remove(&endpoint.connection_id()) { - if dialed_peer != peer { - tracing::warn!( - target: LOG_TARGET, - ?dialed_peer, - ?peer, - ?endpoint, - "peer ids do not match but transport was supposed to reject connection" - ); - debug_assert!(false); - return Err(Error::InvalidState); - } - }; - - // Reject the connection if exceeded limits. - if let Err(error) = self.connection_limits.can_accept_connection(endpoint.is_listener()) { - tracing::debug!( - target: LOG_TARGET, - ?peer, - ?endpoint, - ?error, - "connection limit exceeded, rejecting connection", - ); - return Ok(ConnectionEstablishedResult::Reject); - } - - let mut peers = self.peers.write(); - let context = peers.entry(peer).or_default(); - - let previous_state = context.state.clone(); - let connection_accepted = context - .state - .on_connection_established(ConnectionRecord::from_endpoint(peer, endpoint)); - - tracing::trace!( - target: LOG_TARGET, - ?peer, - ?endpoint, - ?previous_state, - state = ?context.state, - "on connection established completed" - ); - - if connection_accepted { - self.connection_limits - .accept_established_connection(endpoint.connection_id(), endpoint.is_listener()); - - // Cancel all pending dials if the connection was established. - if let PeerState::Opening { - connection_id, - transports, - .. - } = previous_state - { - // cancel all pending dials - transports.iter().for_each(|transport| { - self.transports - .get_mut(transport) - .expect("transport to exist") - .cancel(connection_id); - }); - - // since an inbound connection was removed, the outbound connection can be - // removed from pending dials - // - // This may race in the following scenario: - // - // T0: we open address X on protocol TCP - // T1: remote peer opens a connection with us - // T2: address X is dialed and event is propagated from TCP to transport manager - // T3: `on_connection_established` is called for T1 and pending connections cleared - // T4: event from T2 is delivered. - // - // TODO: see https://github.com/paritytech/litep2p/issues/276 for more details. - self.pending_connections.remove(&connection_id); - } - - return Ok(ConnectionEstablishedResult::Accept); - } - - Ok(ConnectionEstablishedResult::Reject) - } - - fn on_connection_opened( - &mut self, - transport: SupportedTransport, - connection_id: ConnectionId, - address: Multiaddr, - ) -> crate::Result<()> { - let Some(peer) = self.pending_connections.remove(&connection_id) else { - tracing::warn!( - target: LOG_TARGET, - ?connection_id, - ?transport, - ?address, - "connection opened but dial record doesn't exist", - ); - - debug_assert!(false); - return Err(Error::InvalidState); - }; - - let mut peers = self.peers.write(); - let context = peers.entry(peer).or_default(); - - // Keep track of the address. - context.addresses.insert(AddressRecord::new( - &peer, - address.clone(), - scores::CONNECTION_ESTABLISHED, - )); - - let previous_state = context.state.clone(); - let record = ConnectionRecord::new(peer, address.clone(), connection_id); - let state_advanced = context.state.on_connection_opened(record); - if !state_advanced { - tracing::warn!( - target: LOG_TARGET, - ?peer, - ?connection_id, - state = ?context.state, - "connection opened but `PeerState` is not `Opening`", - ); - return Err(Error::InvalidState); - } - - // State advanced from `Opening` to `Dialing`. - let PeerState::Opening { - connection_id, - transports, - .. - } = previous_state - else { - tracing::warn!( - target: LOG_TARGET, - ?peer, - ?connection_id, - state = ?context.state, - "State mismatch in opening expected by peer state transition", - ); - return Err(Error::InvalidState); - }; - - // Cancel open attempts for other transports as connection already exists. - for transport in transports.iter() { - self.transports - .get_mut(transport) - .expect("transport to exist") - .cancel(connection_id); - } - - let negotiation = self - .transports - .get_mut(&transport) - .expect("transport to exist") - .negotiate(connection_id); - - match negotiation { - Ok(()) => { - tracing::trace!( - target: LOG_TARGET, - ?peer, - ?connection_id, - ?transport, - "negotiation started" - ); - - self.pending_connections.insert(connection_id, peer); - - Ok(()) - } - Err(err) => { - tracing::warn!( - target: LOG_TARGET, - ?peer, - ?connection_id, - ?err, - "failed to negotiate connection", - ); - context.state = PeerState::Disconnected { dial_record: None }; - Err(Error::InvalidState) - } - } - } - - /// Handle open failure for dialing attempt for `transport` - fn on_open_failure( - &mut self, - transport: SupportedTransport, - connection_id: ConnectionId, - ) -> crate::Result> { - let Some(peer) = self.pending_connections.get(&connection_id).copied() else { - tracing::warn!( - target: LOG_TARGET, - ?connection_id, - "open failure but dial record doesn't exist", - ); - return Err(Error::InvalidState); - }; - - let mut peers = self.peers.write(); - let context = peers.entry(peer).or_default(); - - let previous_state = context.state.clone(); - let last_transport = context.state.on_open_failure(transport); - - if context.state == previous_state { - tracing::warn!( - target: LOG_TARGET, - ?peer, - ?connection_id, - ?transport, - state = ?context.state, - "invalid state for a open failure", - ); - - return Err(Error::InvalidState); - } - - tracing::trace!( - target: LOG_TARGET, - ?peer, - ?connection_id, - ?transport, - ?previous_state, - state = ?context.state, - "on open failure transition completed" - ); - - if last_transport { - tracing::trace!(target: LOG_TARGET, ?peer, ?connection_id, "open failure for last transport"); - // Remove the pending connection. - self.pending_connections.remove(&connection_id); - // Provide the peer to notify the open failure. - return Ok(Some(peer)); - } - - Ok(None) - } - - /// Poll next event from [`crate::transport::manager::TransportManager`]. - pub async fn next(&mut self) -> Option { - loop { - tokio::select! { - (peer, endpoint, result) = self.pending_accept.select_next_some(), if !self.pending_accept.is_empty() => { - match result { - Ok(()) => { - tracing::trace!( - target: LOG_TARGET, - ?peer, - ?endpoint, - "connection accepted and protocols notified", - ); - - return Some(TransportEvent::ConnectionEstablished { peer, endpoint }); - } - Err(error) => { - // The pending accept future has failed to inform one of the - // installed protocols about the connection. This can happen when the - // node is shutting down or when the user has dropped the long running protocol. - // To err on the safe side, roll back the state modification done in `on_connection_established`. - self.on_connection_closed(peer, endpoint.connection_id()); - - tracing::error!( - target: LOG_TARGET, - ?peer, - ?endpoint, - ?error, - "failed to notify protocols about connection", - ); - } - } - } - event = self.event_rx.recv() => { - let Some(event) = event else { - tracing::error!( - target: LOG_TARGET, - "Installed protocols terminated, ignore if the node is stopping" - ); - - return None; - }; - - match event { - TransportManagerEvent::ConnectionClosed { - peer, - connection: connection_id, - } => if let Some(event) = self.on_connection_closed(peer, connection_id) { - return Some(event); - } - }; - }, - - command = self.cmd_rx.recv() =>{ - let Some(command) = command else { - tracing::error!( - target: LOG_TARGET, - "User command terminated, ignore if the node is stopping" - ); - - return None; - }; - - match command { - InnerTransportManagerCommand::DialPeer { peer } => { - if let Err(error) = self.dial(peer).await { - tracing::debug!(target: LOG_TARGET, ?peer, ?error, "failed to dial peer") - } - } - InnerTransportManagerCommand::DialAddress { address } => { - if let Err(error) = self.dial_address(address).await { - tracing::debug!(target: LOG_TARGET, ?error, "failed to dial peer") - } - } - InnerTransportManagerCommand::UnregisterProtocol { protocol } => { - self.unregister_protocol(protocol); - } - } - }, - - event = self.transports.next() => { - let Some((transport, event)) = event else { - tracing::error!( - target: LOG_TARGET, - "Installed transports terminated, ignore if the node is stopping" - ); - - return None; - }; - - - match event { - TransportEvent::DialFailure { connection_id, address, error } => { - tracing::debug!( - target: LOG_TARGET, - ?connection_id, - ?address, - ?error, - "failed to dial peer", - ); - - // Update the addresses on dial failure regardless of the - // internal peer context state. This ensures a robust address tracking - // while taking into account the error type. - self.update_address_on_dial_failure(address.clone(), &error); - - if let Ok(()) = self.on_dial_failure(connection_id) { - match address.iter().last() { - Some(Protocol::P2p(hash)) => match PeerId::from_multihash(hash) { - Ok(peer) => { - tracing::trace!( - target: LOG_TARGET, - ?connection_id, - ?error, - ?address, - num_protocols = self.protocols.len(), - "dial failure, notify protocols", - ); - - for (protocol, context) in &self.protocols { - tracing::trace!( - target: LOG_TARGET, - ?connection_id, - ?error, - ?address, - ?protocol, - "dial failure, notify protocol", - ); - match context.tx.try_send(InnerTransportEvent::DialFailure { - peer, - addresses: vec![address.clone()], - }) { - Ok(()) => {} - Err(_) => { - tracing::trace!( - target: LOG_TARGET, - ?connection_id, - ?error, - ?address, - ?protocol, - "dial failure, channel to protocol clogged, use await", - ); - let _ = context - .tx - .send(InnerTransportEvent::DialFailure { - peer, - addresses: vec![address.clone()], - }) - .await; - } - } - } - - tracing::trace!( - target: LOG_TARGET, - ?connection_id, - ?error, - ?address, - "all protocols notified", - ); - } - Err(error) => { - tracing::warn!( - target: LOG_TARGET, - ?address, - ?connection_id, - ?error, - "failed to parse `PeerId` from `Multiaddr`", - ); - debug_assert!(false); - } - }, - _ => { - tracing::warn!(target: LOG_TARGET, ?address, ?connection_id, "address doesn't contain `PeerId`"); - debug_assert!(false); - } - } - - return Some(TransportEvent::DialFailure { - connection_id, - address, - error, - }) - } - } - TransportEvent::ConnectionEstablished { peer, endpoint } => { - self.opening_errors.remove(&endpoint.connection_id()); - - match self.on_connection_established(peer, &endpoint) { - Err(error) => { - tracing::debug!( - target: LOG_TARGET, - ?peer, - ?endpoint, - ?error, - "failed to handle established connection", - ); - - let _ = self - .transports - .get_mut(&transport) - .expect("transport to exist") - .reject(endpoint.connection_id()); - } - Ok(ConnectionEstablishedResult::Accept) => { - tracing::trace!( - target: LOG_TARGET, - ?peer, - ?endpoint, - "accept connection", - ); - - match self - .transports - .get_mut(&transport) - .expect("transport to exist") - .accept(endpoint.connection_id()) - { - Ok(future) => { - // A ConnectionEstablished is propagated to the user once - // all protocols have been notified. - self.pending_accept.push(Box::pin(async move { - let result = future.await; - (peer, endpoint, result) - })); - } - Err(error) => { - // Roll back the state modification done in `on_connection_established` by - // simulating a closed connection. The transport returns an error - // while accepting the connection, which can happen if the transport is - // already closed or the connection is dropped before the accept call. - self.on_connection_closed(peer, endpoint.connection_id()); - - tracing::debug!( - target: LOG_TARGET, - ?peer, - ?endpoint, - ?error, - "failed to accept connection", - ); - } - } - } - Ok(ConnectionEstablishedResult::Reject) => { - tracing::trace!( - target: LOG_TARGET, - ?peer, - ?endpoint, - "reject connection", - ); - - let _ = self - .transports - .get_mut(&transport) - .expect("transport to exist") - .reject(endpoint.connection_id()); - } - } - } - TransportEvent::ConnectionOpened { connection_id, address, errors } => { - self.opening_errors.remove(&connection_id); - - for (addr, error) in &errors { - self.update_address_on_dial_failure(addr.clone(), error); - } - - if let Err(error) = self.on_connection_opened(transport, connection_id, address) { - tracing::debug!( - target: LOG_TARGET, - ?connection_id, - ?error, - "failed to handle opened connection", - ); - } - } - TransportEvent::OpenFailure { connection_id, errors } => { - for (address, error) in &errors { - self.update_address_on_dial_failure(address.clone(), error); - } - - match self.on_open_failure(transport, connection_id) { - Err(error) => tracing::debug!( - target: LOG_TARGET, - ?connection_id, - ?error, - "failed to handle opened connection", - ), - Ok(Some(peer)) => { - tracing::trace!( - target: LOG_TARGET, - ?peer, - ?connection_id, - num_protocols = self.protocols.len(), - "inform protocols about open failure", - ); - - let addresses = errors - .iter() - .map(|(address, _)| address.clone()) - .collect::>(); - - for (protocol, context) in &self.protocols { - let _ = match context - .tx - .try_send(InnerTransportEvent::DialFailure { - peer, - addresses: addresses.clone(), - }) { - Ok(_) => Ok(()), - Err(_) => { - tracing::trace!( - target: LOG_TARGET, - ?peer, - %protocol, - ?connection_id, - "call to protocol would block try sending in a blocking way", - ); - - context - .tx - .send(InnerTransportEvent::DialFailure { - peer, - addresses: addresses.clone(), - }) - .await - } - }; - } - - let mut grouped_errors = self.opening_errors.remove(&connection_id).unwrap_or_default(); - grouped_errors.extend(errors); - return Some(TransportEvent::OpenFailure { connection_id, errors: grouped_errors }); - } - Ok(None) => { - tracing::trace!( - target: LOG_TARGET, - ?connection_id, - "open failure, but not the last transport", - ); - - self.opening_errors.entry(connection_id).or_default().extend(errors); - } - } - }, - TransportEvent::PendingInboundConnection { connection_id } => { - if self.on_pending_incoming_connection().is_ok() { - tracing::trace!( - target: LOG_TARGET, - ?connection_id, - "accept pending incoming connection", - ); - - let _ = self - .transports - .get_mut(&transport) - .expect("transport to exist") - .accept_pending(connection_id); - } else { - tracing::debug!( - target: LOG_TARGET, - ?connection_id, - "reject pending incoming connection", - ); - - let _ = self - .transports - .get_mut(&transport) - .expect("transport to exist") - .reject_pending(connection_id); - } - }, - event => panic!("event not supported: {event:?}"), - } - }, - } - } - } + /// Get iterator to installed protocols. + pub fn protocols(&self) -> impl Iterator { + self.protocols.keys() + } + + /// Get iterator to installed transports + pub fn installed_transports(&self) -> impl Iterator { + self.transports.keys() + } + + /// Get next connection ID. + fn next_connection_id(&self) -> ConnectionId { + let connection_id = self.next_connection_id.fetch_add(1usize, Ordering::Relaxed); + + ConnectionId::from(connection_id) + } + + /// Get the transport manager handle + pub fn transport_manager_handle(&self) -> TransportManagerHandle { + self.transport_manager_handle.clone() + } + + /// Register protocol to the [`crate::transport::manager::TransportManager`]. + /// + /// This allocates new context for the protocol and returns a handle + /// which the protocol can use the interact with the transport subsystem. + pub fn register_protocol( + &mut self, + protocol: ProtocolName, + fallback_names: Vec, + codec: ProtocolCodec, + keep_alive_timeout: Duration, + substream_keep_alive: SubstreamKeepAlive, + ) -> TransportService { + assert!(!self.protocol_names.contains(&protocol)); + + for fallback in &fallback_names { + if self.protocol_names.contains(fallback) { + panic!("duplicate fallback protocol given: {fallback:?}"); + } + } + + let (service, sender) = TransportService::new( + self.local_peer_id, + protocol.clone(), + fallback_names.clone(), + self.next_substream_id.clone(), + self.transport_manager_handle(), + keep_alive_timeout, + substream_keep_alive, + ); + + self.protocols.insert( + protocol.clone(), + ProtocolContext::new(codec, sender, fallback_names.clone(), substream_keep_alive), + ); + self.protocol_names.insert(protocol); + self.protocol_names.extend(fallback_names); + + service + } + + /// Unregister a protocol in response of the user dropping the protocol handle. + fn unregister_protocol(&mut self, protocol: ProtocolName) { + let Some(context) = self.protocols.remove(&protocol) else { + tracing::error!(target: LOG_TARGET, ?protocol, "Cannot unregister protocol, not registered"); + return; + }; + + for fallback in &context.fallback_names { + if !self.protocol_names.remove(fallback) { + tracing::error!(target: LOG_TARGET, ?fallback, ?protocol, "Cannot unregister fallback protocol, not registered"); + } + } + + tracing::info!( + target: LOG_TARGET, + ?protocol, + "Protocol fully unregistered" + ); + } + + /// Acquire `TransportHandle`. + pub fn transport_handle(&self, executor: Arc) -> TransportHandle { + TransportHandle { + tx: self.event_tx.clone(), + executor, + keypair: self.keypair.clone(), + protocols: self.protocols.clone(), + bandwidth_sink: self.bandwidth_sink.clone(), + next_substream_id: self.next_substream_id.clone(), + next_connection_id: self.next_connection_id.clone(), + } + } + + /// Register transport to `TransportManager`. + pub(crate) fn register_transport( + &mut self, + name: SupportedTransport, + transport: Box>, + ) { + tracing::debug!(target: LOG_TARGET, transport = ?name, "register transport"); + + self.transports.register_transport(name, transport); + self.transport_manager_handle.register_transport(name); + } + + /// Get the list of public addresses of the node. + pub(crate) fn public_addresses(&self) -> PublicAddresses { + self.public_addresses.clone() + } + + /// Register local listen address. + pub fn register_listen_address(&mut self, address: Multiaddr) { + assert!(!address.iter().any(|protocol| std::matches!(protocol, Protocol::P2p(_)))); + + let mut listen_addresses = self.listen_addresses.write(); + + listen_addresses.insert(address.clone()); + listen_addresses.insert( + address.with(Protocol::P2p( + Multihash::from_bytes(&self.local_peer_id.to_bytes()).unwrap(), + )), + ); + } + + /// Add one or more known addresses for `peer`. + pub fn add_known_address( + &mut self, + peer: PeerId, + address: impl Iterator, + ) -> usize { + self.transport_manager_handle.add_known_address(&peer, address) + } + + /// Return multiple addresses to dial on supported protocols. + fn supported_transports_addresses( + addresses: &[Multiaddr], + ) -> HashMap> { + let mut transports = HashMap::>::new(); + + for address in addresses.iter().cloned() { + #[cfg(feature = "quic")] + if address.iter().any(|p| std::matches!(&p, Protocol::QuicV1)) { + transports.entry(SupportedTransport::Quic).or_default().push(address); + continue; + } + + #[cfg(feature = "websocket")] + if address.iter().any(|p| std::matches!(&p, Protocol::Ws(_) | Protocol::Wss(_))) { + transports.entry(SupportedTransport::WebSocket).or_default().push(address); + continue; + } + + transports.entry(SupportedTransport::Tcp).or_default().push(address); + } + + transports + } + + /// Dial peer using `PeerId`. + /// + /// Returns an error if the peer is unknown or the peer is already connected. + pub async fn dial(&mut self, peer: PeerId) -> crate::Result<()> { + // Don't alter the peer state if there's no capacity to dial. + let available_capacity = self.connection_limits.on_dial_address()?; + + if peer == self.local_peer_id { + return Err(Error::TriedToDialSelf); + } + let mut peers = self.peers.write(); + + let context = peers.entry(peer).or_default(); + + // Check if dialing is possible before allocating addresses. + match context.state.can_dial() { + StateDialResult::AlreadyConnected => return Err(Error::AlreadyConnected), + StateDialResult::DialingInProgress => return Ok(()), + StateDialResult::Ok => {}, + }; + + // The addresses are sorted by score and contain the remote peer ID. + // We double checked above that the remote peer is not the local peer. + // Limit addresses by the available connection capacity. The transport layer + // handles dial concurrency via `max_parallel_dials`. + let dial_addresses = context.addresses.addresses(available_capacity); + if dial_addresses.is_empty() { + return Err(Error::NoAddressAvailable(peer)); + } + let connection_id = self.next_connection_id(); + + tracing::debug!( + target: LOG_TARGET, + ?connection_id, + addresses = ?dial_addresses, + "dial remote peer", + ); + + let transports = Self::supported_transports_addresses(&dial_addresses); + + // Dialing addresses will succeed because the `context.state.can_dial()` returned `Ok`. + let result = context.state.dial_addresses( + connection_id, + dial_addresses.iter().cloned().collect(), + transports.keys().cloned().collect(), + ); + if result != StateDialResult::Ok { + tracing::warn!( + target: LOG_TARGET, + ?peer, + ?connection_id, + state = ?context.state, + "invalid state for dialing", + ); + } + + for (transport, addresses) in transports { + if addresses.is_empty() { + continue; + } + + let Some(installed_transport) = self.transports.get_mut(&transport) else { + continue; + }; + + installed_transport.open(connection_id, addresses)?; + } + + self.pending_connections.insert(connection_id, peer); + + Ok(()) + } + + /// Dial peer using `Multiaddr`. + /// + /// Returns an error if address it not valid. + pub async fn dial_address(&mut self, address: Multiaddr) -> crate::Result<()> { + self.connection_limits.on_dial_address()?; + + let address_record = AddressRecord::from_multiaddr(address) + .ok_or(Error::AddressError(AddressError::PeerIdMissing))?; + + if self.listen_addresses.read().contains(address_record.as_ref()) { + return Err(Error::TriedToDialSelf); + } + + tracing::debug!(target: LOG_TARGET, address = ?address_record.address(), "dial address"); + + let mut protocol_stack = address_record.as_ref().iter(); + match protocol_stack + .next() + .ok_or_else(|| Error::TransportNotSupported(address_record.address().clone()))? + { + Protocol::Ip4(_) | Protocol::Ip6(_) => {}, + Protocol::Dns(_) | Protocol::Dns4(_) | Protocol::Dns6(_) => {}, + transport => { + tracing::error!( + target: LOG_TARGET, + ?transport, + "invalid transport, expected `ip4`/`ip6`" + ); + return Err(Error::TransportNotSupported(address_record.address().clone())); + }, + }; + + let supported_transport = match protocol_stack + .next() + .ok_or_else(|| Error::TransportNotSupported(address_record.address().clone()))? + { + Protocol::Tcp(_) => match protocol_stack.next() { + #[cfg(feature = "websocket")] + Some(Protocol::Ws(_)) | Some(Protocol::Wss(_)) => SupportedTransport::WebSocket, + Some(Protocol::P2p(_)) => SupportedTransport::Tcp, + _ => return Err(Error::TransportNotSupported(address_record.address().clone())), + }, + #[cfg(feature = "quic")] + Protocol::Udp(_) => match protocol_stack + .next() + .ok_or_else(|| Error::TransportNotSupported(address_record.address().clone()))? + { + Protocol::QuicV1 => SupportedTransport::Quic, + _ => { + tracing::debug!(target: LOG_TARGET, address = ?address_record.address(), "expected `quic-v1`"); + return Err(Error::TransportNotSupported(address_record.address().clone())); + }, + }, + protocol => { + tracing::error!( + target: LOG_TARGET, + ?protocol, + "invalid protocol" + ); + + return Err(Error::TransportNotSupported(address_record.address().clone())); + }, + }; + + // when constructing `AddressRecord`, `PeerId` was verified to be part of the address + let remote_peer_id = + PeerId::try_from_multiaddr(address_record.address()).expect("`PeerId` to exist"); + + // set connection id for the address record and put peer into `Dialing` state + let connection_id = self.next_connection_id(); + let dial_record = + ConnectionRecord { address: address_record.address().clone(), connection_id }; + + { + let mut peers = self.peers.write(); + + let context = peers.entry(remote_peer_id).or_default(); + + // Keep the provided record around for possible future dials. + context.addresses.insert(address_record.clone()); + + match context.state.dial_single_address(dial_record) { + StateDialResult::AlreadyConnected => return Err(Error::AlreadyConnected), + StateDialResult::DialingInProgress => return Ok(()), + StateDialResult::Ok => {}, + }; + } + + self.transports + .get_mut(&supported_transport) + .ok_or(Error::TransportNotSupported(address_record.address().clone()))? + .dial(connection_id, address_record.address().clone())?; + self.pending_connections.insert(connection_id, remote_peer_id); + + Ok(()) + } + + // Update the address on a dial failure. + fn update_address_on_dial_failure(&mut self, address: Multiaddr, error: &DialError) { + let mut peers = self.peers.write(); + + let score = AddressStore::error_score(error); + + // Extract the peer ID at this point to give `NegotiationError::PeerIdMismatch` a chance to + // propagate. + let peer_id = match address.iter().last() { + Some(Protocol::P2p(hash)) => PeerId::from_multihash(hash).ok(), + _ => None, + }; + let Some(peer_id) = peer_id else { + return; + }; + + // We need a valid context for this peer to keep track of failed addresses. + let context = peers.entry(peer_id).or_default(); + context.addresses.insert(AddressRecord::new(&peer_id, address.clone(), score)); + } + + /// Handle dial failure. + /// + /// The main purpose of this function is to advance the internal `PeerState`. + fn on_dial_failure(&mut self, connection_id: ConnectionId) -> crate::Result<()> { + tracing::trace!(target: LOG_TARGET, ?connection_id, "on dial failure"); + + let peer = self.pending_connections.remove(&connection_id).ok_or_else(|| { + tracing::error!( + target: LOG_TARGET, + ?connection_id, + "dial failed for a connection that doesn't exist", + ); + Error::InvalidState + })?; + + let mut peers = self.peers.write(); + let context = peers.entry(peer).or_default(); + let previous_state = context.state.clone(); + + if !context.state.on_dial_failure(connection_id) { + tracing::warn!( + target: LOG_TARGET, + ?peer, + ?connection_id, + state = ?context.state, + "invalid state for dial failure", + ); + } else { + tracing::trace!( + target: LOG_TARGET, + ?peer, + ?connection_id, + ?previous_state, + state = ?context.state, + "on dial failure completed" + ); + } + + Ok(()) + } + + fn on_pending_incoming_connection(&mut self) -> crate::Result<()> { + self.connection_limits.on_incoming()?; + Ok(()) + } + + /// Handle closed connection. + fn on_connection_closed( + &mut self, + peer: PeerId, + connection_id: ConnectionId, + ) -> Option { + tracing::trace!(target: LOG_TARGET, ?peer, ?connection_id, "connection closed"); + + self.connection_limits.on_connection_closed(connection_id); + + let mut peers = self.peers.write(); + let context = peers.entry(peer).or_default(); + + let previous_state = context.state.clone(); + let connection_closed = context.state.on_connection_closed(connection_id); + + if context.state == previous_state { + tracing::warn!( + target: LOG_TARGET, + ?peer, + ?connection_id, + state = ?context.state, + "invalid state for a closed connection", + ); + } else { + tracing::trace!( + target: LOG_TARGET, + ?peer, + ?connection_id, + ?previous_state, + state = ?context.state, + "on connection closed completed" + ); + } + + connection_closed.then_some(TransportEvent::ConnectionClosed { peer, connection_id }) + } + + /// Update the address on a connection established. + fn update_address_on_connection_established(&mut self, peer: PeerId, endpoint: &Endpoint) { + // The connection can be inbound or outbound. + // For the inbound connection type, in most cases, the remote peer dialed + // with an ephemeral port which it might not be listening on. + // Therefore, we only insert the address into the store if we're the dialer. + if endpoint.is_listener() { + return; + } + + let mut peers = self.peers.write(); + + let record = + AddressRecord::new(&peer, endpoint.address().clone(), scores::CONNECTION_ESTABLISHED); + + let context = peers.entry(peer).or_default(); + context.addresses.insert(record); + } + + fn on_connection_established( + &mut self, + peer: PeerId, + endpoint: &Endpoint, + ) -> crate::Result { + self.update_address_on_connection_established(peer, endpoint); + + if let Some(dialed_peer) = self.pending_connections.remove(&endpoint.connection_id()) { + if dialed_peer != peer { + tracing::warn!( + target: LOG_TARGET, + ?dialed_peer, + ?peer, + ?endpoint, + "peer ids do not match but transport was supposed to reject connection" + ); + debug_assert!(false); + return Err(Error::InvalidState); + } + }; + + // Reject the connection if exceeded limits. + if let Err(error) = self.connection_limits.can_accept_connection(endpoint.is_listener()) { + tracing::debug!( + target: LOG_TARGET, + ?peer, + ?endpoint, + ?error, + "connection limit exceeded, rejecting connection", + ); + return Ok(ConnectionEstablishedResult::Reject); + } + + let mut peers = self.peers.write(); + let context = peers.entry(peer).or_default(); + + let previous_state = context.state.clone(); + let connection_accepted = context + .state + .on_connection_established(ConnectionRecord::from_endpoint(peer, endpoint)); + + tracing::trace!( + target: LOG_TARGET, + ?peer, + ?endpoint, + ?previous_state, + state = ?context.state, + "on connection established completed" + ); + + if connection_accepted { + self.connection_limits + .accept_established_connection(endpoint.connection_id(), endpoint.is_listener()); + + // Cancel all pending dials if the connection was established. + if let PeerState::Opening { connection_id, transports, .. } = previous_state { + // cancel all pending dials + transports.iter().for_each(|transport| { + self.transports + .get_mut(transport) + .expect("transport to exist") + .cancel(connection_id); + }); + + // since an inbound connection was removed, the outbound connection can be + // removed from pending dials + // + // This may race in the following scenario: + // + // T0: we open address X on protocol TCP + // T1: remote peer opens a connection with us + // T2: address X is dialed and event is propagated from TCP to transport manager + // T3: `on_connection_established` is called for T1 and pending connections cleared + // T4: event from T2 is delivered. + // + // TODO: see https://github.com/paritytech/litep2p/issues/276 for more details. + self.pending_connections.remove(&connection_id); + } + + return Ok(ConnectionEstablishedResult::Accept); + } + + Ok(ConnectionEstablishedResult::Reject) + } + + fn on_connection_opened( + &mut self, + transport: SupportedTransport, + connection_id: ConnectionId, + address: Multiaddr, + ) -> crate::Result<()> { + let Some(peer) = self.pending_connections.remove(&connection_id) else { + tracing::warn!( + target: LOG_TARGET, + ?connection_id, + ?transport, + ?address, + "connection opened but dial record doesn't exist", + ); + + debug_assert!(false); + return Err(Error::InvalidState); + }; + + let mut peers = self.peers.write(); + let context = peers.entry(peer).or_default(); + + // Keep track of the address. + context.addresses.insert(AddressRecord::new( + &peer, + address.clone(), + scores::CONNECTION_ESTABLISHED, + )); + + let previous_state = context.state.clone(); + let record = ConnectionRecord::new(peer, address.clone(), connection_id); + let state_advanced = context.state.on_connection_opened(record); + if !state_advanced { + tracing::warn!( + target: LOG_TARGET, + ?peer, + ?connection_id, + state = ?context.state, + "connection opened but `PeerState` is not `Opening`", + ); + return Err(Error::InvalidState); + } + + // State advanced from `Opening` to `Dialing`. + let PeerState::Opening { connection_id, transports, .. } = previous_state else { + tracing::warn!( + target: LOG_TARGET, + ?peer, + ?connection_id, + state = ?context.state, + "State mismatch in opening expected by peer state transition", + ); + return Err(Error::InvalidState); + }; + + // Cancel open attempts for other transports as connection already exists. + for transport in transports.iter() { + self.transports + .get_mut(transport) + .expect("transport to exist") + .cancel(connection_id); + } + + let negotiation = self + .transports + .get_mut(&transport) + .expect("transport to exist") + .negotiate(connection_id); + + match negotiation { + Ok(()) => { + tracing::trace!( + target: LOG_TARGET, + ?peer, + ?connection_id, + ?transport, + "negotiation started" + ); + + self.pending_connections.insert(connection_id, peer); + + Ok(()) + }, + Err(err) => { + tracing::warn!( + target: LOG_TARGET, + ?peer, + ?connection_id, + ?err, + "failed to negotiate connection", + ); + context.state = PeerState::Disconnected { dial_record: None }; + Err(Error::InvalidState) + }, + } + } + + /// Handle open failure for dialing attempt for `transport` + fn on_open_failure( + &mut self, + transport: SupportedTransport, + connection_id: ConnectionId, + ) -> crate::Result> { + let Some(peer) = self.pending_connections.get(&connection_id).copied() else { + tracing::warn!( + target: LOG_TARGET, + ?connection_id, + "open failure but dial record doesn't exist", + ); + return Err(Error::InvalidState); + }; + + let mut peers = self.peers.write(); + let context = peers.entry(peer).or_default(); + + let previous_state = context.state.clone(); + let last_transport = context.state.on_open_failure(transport); + + if context.state == previous_state { + tracing::warn!( + target: LOG_TARGET, + ?peer, + ?connection_id, + ?transport, + state = ?context.state, + "invalid state for a open failure", + ); + + return Err(Error::InvalidState); + } + + tracing::trace!( + target: LOG_TARGET, + ?peer, + ?connection_id, + ?transport, + ?previous_state, + state = ?context.state, + "on open failure transition completed" + ); + + if last_transport { + tracing::trace!(target: LOG_TARGET, ?peer, ?connection_id, "open failure for last transport"); + // Remove the pending connection. + self.pending_connections.remove(&connection_id); + // Provide the peer to notify the open failure. + return Ok(Some(peer)); + } + + Ok(None) + } + + /// Poll next event from [`crate::transport::manager::TransportManager`]. + pub async fn next(&mut self) -> Option { + loop { + tokio::select! { + (peer, endpoint, result) = self.pending_accept.select_next_some(), if !self.pending_accept.is_empty() => { + match result { + Ok(()) => { + tracing::trace!( + target: LOG_TARGET, + ?peer, + ?endpoint, + "connection accepted and protocols notified", + ); + + return Some(TransportEvent::ConnectionEstablished { peer, endpoint }); + } + Err(error) => { + // The pending accept future has failed to inform one of the + // installed protocols about the connection. This can happen when the + // node is shutting down or when the user has dropped the long running protocol. + // To err on the safe side, roll back the state modification done in `on_connection_established`. + self.on_connection_closed(peer, endpoint.connection_id()); + + tracing::error!( + target: LOG_TARGET, + ?peer, + ?endpoint, + ?error, + "failed to notify protocols about connection", + ); + } + } + } + event = self.event_rx.recv() => { + let Some(event) = event else { + tracing::error!( + target: LOG_TARGET, + "Installed protocols terminated, ignore if the node is stopping" + ); + + return None; + }; + + match event { + TransportManagerEvent::ConnectionClosed { + peer, + connection: connection_id, + } => if let Some(event) = self.on_connection_closed(peer, connection_id) { + return Some(event); + } + }; + }, + + command = self.cmd_rx.recv() =>{ + let Some(command) = command else { + tracing::error!( + target: LOG_TARGET, + "User command terminated, ignore if the node is stopping" + ); + + return None; + }; + + match command { + InnerTransportManagerCommand::DialPeer { peer } => { + if let Err(error) = self.dial(peer).await { + tracing::debug!(target: LOG_TARGET, ?peer, ?error, "failed to dial peer") + } + } + InnerTransportManagerCommand::DialAddress { address } => { + if let Err(error) = self.dial_address(address).await { + tracing::debug!(target: LOG_TARGET, ?error, "failed to dial peer") + } + } + InnerTransportManagerCommand::UnregisterProtocol { protocol } => { + self.unregister_protocol(protocol); + } + } + }, + + event = self.transports.next() => { + let Some((transport, event)) = event else { + tracing::error!( + target: LOG_TARGET, + "Installed transports terminated, ignore if the node is stopping" + ); + + return None; + }; + + + match event { + TransportEvent::DialFailure { connection_id, address, error } => { + tracing::debug!( + target: LOG_TARGET, + ?connection_id, + ?address, + ?error, + "failed to dial peer", + ); + + // Update the addresses on dial failure regardless of the + // internal peer context state. This ensures a robust address tracking + // while taking into account the error type. + self.update_address_on_dial_failure(address.clone(), &error); + + if let Ok(()) = self.on_dial_failure(connection_id) { + match address.iter().last() { + Some(Protocol::P2p(hash)) => match PeerId::from_multihash(hash) { + Ok(peer) => { + tracing::trace!( + target: LOG_TARGET, + ?connection_id, + ?error, + ?address, + num_protocols = self.protocols.len(), + "dial failure, notify protocols", + ); + + for (protocol, context) in &self.protocols { + tracing::trace!( + target: LOG_TARGET, + ?connection_id, + ?error, + ?address, + ?protocol, + "dial failure, notify protocol", + ); + match context.tx.try_send(InnerTransportEvent::DialFailure { + peer, + addresses: vec![address.clone()], + }) { + Ok(()) => {} + Err(_) => { + tracing::trace!( + target: LOG_TARGET, + ?connection_id, + ?error, + ?address, + ?protocol, + "dial failure, channel to protocol clogged, use await", + ); + let _ = context + .tx + .send(InnerTransportEvent::DialFailure { + peer, + addresses: vec![address.clone()], + }) + .await; + } + } + } + + tracing::trace!( + target: LOG_TARGET, + ?connection_id, + ?error, + ?address, + "all protocols notified", + ); + } + Err(error) => { + tracing::warn!( + target: LOG_TARGET, + ?address, + ?connection_id, + ?error, + "failed to parse `PeerId` from `Multiaddr`", + ); + debug_assert!(false); + } + }, + _ => { + tracing::warn!(target: LOG_TARGET, ?address, ?connection_id, "address doesn't contain `PeerId`"); + debug_assert!(false); + } + } + + return Some(TransportEvent::DialFailure { + connection_id, + address, + error, + }) + } + } + TransportEvent::ConnectionEstablished { peer, endpoint } => { + self.opening_errors.remove(&endpoint.connection_id()); + + match self.on_connection_established(peer, &endpoint) { + Err(error) => { + tracing::debug!( + target: LOG_TARGET, + ?peer, + ?endpoint, + ?error, + "failed to handle established connection", + ); + + let _ = self + .transports + .get_mut(&transport) + .expect("transport to exist") + .reject(endpoint.connection_id()); + } + Ok(ConnectionEstablishedResult::Accept) => { + tracing::trace!( + target: LOG_TARGET, + ?peer, + ?endpoint, + "accept connection", + ); + + match self + .transports + .get_mut(&transport) + .expect("transport to exist") + .accept(endpoint.connection_id()) + { + Ok(future) => { + // A ConnectionEstablished is propagated to the user once + // all protocols have been notified. + self.pending_accept.push(Box::pin(async move { + let result = future.await; + (peer, endpoint, result) + })); + } + Err(error) => { + // Roll back the state modification done in `on_connection_established` by + // simulating a closed connection. The transport returns an error + // while accepting the connection, which can happen if the transport is + // already closed or the connection is dropped before the accept call. + self.on_connection_closed(peer, endpoint.connection_id()); + + tracing::debug!( + target: LOG_TARGET, + ?peer, + ?endpoint, + ?error, + "failed to accept connection", + ); + } + } + } + Ok(ConnectionEstablishedResult::Reject) => { + tracing::trace!( + target: LOG_TARGET, + ?peer, + ?endpoint, + "reject connection", + ); + + let _ = self + .transports + .get_mut(&transport) + .expect("transport to exist") + .reject(endpoint.connection_id()); + } + } + } + TransportEvent::ConnectionOpened { connection_id, address, errors } => { + self.opening_errors.remove(&connection_id); + + for (addr, error) in &errors { + self.update_address_on_dial_failure(addr.clone(), error); + } + + if let Err(error) = self.on_connection_opened(transport, connection_id, address) { + tracing::debug!( + target: LOG_TARGET, + ?connection_id, + ?error, + "failed to handle opened connection", + ); + } + } + TransportEvent::OpenFailure { connection_id, errors } => { + for (address, error) in &errors { + self.update_address_on_dial_failure(address.clone(), error); + } + + match self.on_open_failure(transport, connection_id) { + Err(error) => tracing::debug!( + target: LOG_TARGET, + ?connection_id, + ?error, + "failed to handle opened connection", + ), + Ok(Some(peer)) => { + tracing::trace!( + target: LOG_TARGET, + ?peer, + ?connection_id, + num_protocols = self.protocols.len(), + "inform protocols about open failure", + ); + + let addresses = errors + .iter() + .map(|(address, _)| address.clone()) + .collect::>(); + + for (protocol, context) in &self.protocols { + let _ = match context + .tx + .try_send(InnerTransportEvent::DialFailure { + peer, + addresses: addresses.clone(), + }) { + Ok(_) => Ok(()), + Err(_) => { + tracing::trace!( + target: LOG_TARGET, + ?peer, + %protocol, + ?connection_id, + "call to protocol would block try sending in a blocking way", + ); + + context + .tx + .send(InnerTransportEvent::DialFailure { + peer, + addresses: addresses.clone(), + }) + .await + } + }; + } + + let mut grouped_errors = self.opening_errors.remove(&connection_id).unwrap_or_default(); + grouped_errors.extend(errors); + return Some(TransportEvent::OpenFailure { connection_id, errors: grouped_errors }); + } + Ok(None) => { + tracing::trace!( + target: LOG_TARGET, + ?connection_id, + "open failure, but not the last transport", + ); + + self.opening_errors.entry(connection_id).or_default().extend(errors); + } + } + }, + TransportEvent::PendingInboundConnection { connection_id } => { + if self.on_pending_incoming_connection().is_ok() { + tracing::trace!( + target: LOG_TARGET, + ?connection_id, + "accept pending incoming connection", + ); + + let _ = self + .transports + .get_mut(&transport) + .expect("transport to exist") + .accept_pending(connection_id); + } else { + tracing::debug!( + target: LOG_TARGET, + ?connection_id, + "reject pending incoming connection", + ); + + let _ = self + .transports + .get_mut(&transport) + .expect("transport to exist") + .reject_pending(connection_id); + } + }, + event => panic!("event not supported: {event:?}"), + } + }, + } + } + } } #[cfg(test)] mod tests { - use crate::transport::manager::{address::AddressStore, peer_state::SecondaryOrDialing}; - use limits::ConnectionLimitsConfig; - - use multihash::Multihash; - - use super::*; - use crate::{ - crypto::dilithium::Keypair, - executor::DefaultExecutor, - transport::{dummy::DummyTransport, KEEP_ALIVE_TIMEOUT}, - }; - #[cfg(feature = "websocket")] - use std::borrow::Cow; - use std::{ - net::{Ipv4Addr, Ipv6Addr}, - sync::Arc, - usize, - }; - - /// Setup TCP address and connection id. - fn setup_dial_addr(peer: PeerId, connection_id: u16) -> (Multiaddr, ConnectionId) { - let dial_address = Multiaddr::empty() - .with(Protocol::Ip4(Ipv4Addr::new(127, 0, 0, 1))) - .with(Protocol::Tcp(8888 + connection_id)) - .with(Protocol::P2p( - Multihash::from_bytes(&peer.to_bytes()).unwrap(), - )); - let connection_id = ConnectionId::from(connection_id as usize); - - (dial_address, connection_id) - } - - #[tokio::test] - #[cfg(feature = "websocket")] - #[cfg(feature = "quic")] - async fn transport_events() { - struct MockTransport { - rx: tokio::sync::mpsc::Receiver, - } - - impl MockTransport { - fn new(rx: tokio::sync::mpsc::Receiver) -> Self { - Self { rx } - } - } - - impl Transport for MockTransport { - fn dial( - &mut self, - _connection_id: ConnectionId, - _address: Multiaddr, - ) -> crate::Result<()> { - Ok(()) - } - - fn accept( - &mut self, - _connection_id: ConnectionId, - ) -> crate::Result>> { - Ok(Box::pin(async { Ok(()) })) - } - - fn accept_pending(&mut self, _connection_id: ConnectionId) -> crate::Result<()> { - Ok(()) - } - - fn reject_pending(&mut self, _connection_id: ConnectionId) -> crate::Result<()> { - Ok(()) - } - - fn reject(&mut self, _connection_id: ConnectionId) -> crate::Result<()> { - Ok(()) - } - - fn open( - &mut self, - _connection_id: ConnectionId, - _addresses: Vec, - ) -> crate::Result<()> { - Ok(()) - } - - fn negotiate(&mut self, _connection_id: ConnectionId) -> crate::Result<()> { - Ok(()) - } - - fn cancel(&mut self, _connection_id: ConnectionId) {} - } - - impl Stream for MockTransport { - type Item = TransportEvent; - fn poll_next( - mut self: Pin<&mut Self>, - cx: &mut Context<'_>, - ) -> Poll> { - self.rx.poll_recv(cx) - } - } - - let mut transports = TransportContext::new(); - - let (tx_tcp, rx) = tokio::sync::mpsc::channel(8); - let transport = MockTransport::new(rx); - transports.register_transport(SupportedTransport::Tcp, Box::new(transport)); - - let (tx_ws, rx) = tokio::sync::mpsc::channel(8); - let transport = MockTransport::new(rx); - transports.register_transport(SupportedTransport::WebSocket, Box::new(transport)); - - let (tx_quic, rx) = tokio::sync::mpsc::channel(8); - let transport = MockTransport::new(rx); - transports.register_transport(SupportedTransport::Quic, Box::new(transport)); - - assert_eq!(transports.index, 0); - assert_eq!(transports.transports.len(), 3); - // No items. - futures::future::poll_fn(|cx| match transports.poll_next_unpin(cx) { - std::task::Poll::Ready(_) => panic!("didn't expect event from `TransportService`"), - std::task::Poll::Pending => std::task::Poll::Ready(()), - }) - .await; - assert_eq!(transports.index, 0); - - // Websocket events. - tx_ws - .send(TransportEvent::PendingInboundConnection { - connection_id: ConnectionId::from(1), - }) - .await - .expect("channel to be open"); - - let event = futures::future::poll_fn(|cx| transports.poll_next_unpin(cx)) - .await - .expect("expected event"); - assert_eq!(event.0, SupportedTransport::WebSocket); - assert!(std::matches!( - event.1, - TransportEvent::PendingInboundConnection { .. } - )); - assert_eq!(transports.index, 2); - - // TCP events. - tx_tcp - .send(TransportEvent::PendingInboundConnection { - connection_id: ConnectionId::from(2), - }) - .await - .expect("channel to be open"); - - let event = futures::future::poll_fn(|cx| transports.poll_next_unpin(cx)) - .await - .expect("expected event"); - assert_eq!(event.0, SupportedTransport::Tcp); - assert!(std::matches!( - event.1, - TransportEvent::PendingInboundConnection { .. } - )); - assert_eq!(transports.index, 1); - - // QUIC events - tx_quic - .send(TransportEvent::PendingInboundConnection { - connection_id: ConnectionId::from(3), - }) - .await - .expect("channel to be open"); - - let event = futures::future::poll_fn(|cx| transports.poll_next_unpin(cx)) - .await - .expect("expected event"); - assert_eq!(event.0, SupportedTransport::Quic); - assert!(std::matches!( - event.1, - TransportEvent::PendingInboundConnection { .. } - )); - assert_eq!(transports.index, 0); - - // All three transports produce events. - tx_ws - .send(TransportEvent::PendingInboundConnection { - connection_id: ConnectionId::from(4), - }) - .await - .expect("channel to be open"); - tx_tcp - .send(TransportEvent::PendingInboundConnection { - connection_id: ConnectionId::from(5), - }) - .await - .expect("channel to be open"); - tx_quic - .send(TransportEvent::PendingInboundConnection { - connection_id: ConnectionId::from(6), - }) - .await - .expect("channel to be open"); - - let event = futures::future::poll_fn(|cx| transports.poll_next_unpin(cx)) - .await - .expect("expected event"); - assert_eq!(event.0, SupportedTransport::Tcp); - assert!(std::matches!( - event.1, - TransportEvent::PendingInboundConnection { .. } - )); - assert_eq!(transports.index, 1); - - let event = futures::future::poll_fn(|cx| transports.poll_next_unpin(cx)) - .await - .expect("expected event"); - assert_eq!(event.0, SupportedTransport::WebSocket); - assert!(std::matches!( - event.1, - TransportEvent::PendingInboundConnection { .. } - )); - assert_eq!(transports.index, 2); - - let event = futures::future::poll_fn(|cx| transports.poll_next_unpin(cx)) - .await - .expect("expected event"); - assert_eq!(event.0, SupportedTransport::Quic); - assert!(std::matches!( - event.1, - TransportEvent::PendingInboundConnection { .. } - )); - assert_eq!(transports.index, 0); - } - - #[test] - #[should_panic] - #[cfg(debug_assertions)] - fn duplicate_protocol() { - let mut manager = TransportManagerBuilder::new().build(); - - manager.register_protocol( - ProtocolName::from("/notif/1"), - Vec::new(), - ProtocolCodec::UnsignedVarint(None), - KEEP_ALIVE_TIMEOUT, - SubstreamKeepAlive::Yes, - ); - manager.register_protocol( - ProtocolName::from("/notif/1"), - Vec::new(), - ProtocolCodec::UnsignedVarint(None), - KEEP_ALIVE_TIMEOUT, - SubstreamKeepAlive::Yes, - ); - } - - #[test] - #[should_panic] - #[cfg(debug_assertions)] - fn fallback_protocol_as_duplicate_main_protocol() { - let mut manager = TransportManagerBuilder::new().build(); - - manager.register_protocol( - ProtocolName::from("/notif/1"), - Vec::new(), - ProtocolCodec::UnsignedVarint(None), - KEEP_ALIVE_TIMEOUT, - SubstreamKeepAlive::Yes, - ); - manager.register_protocol( - ProtocolName::from("/notif/2"), - vec![ - ProtocolName::from("/notif/2/new"), - ProtocolName::from("/notif/1"), - ], - ProtocolCodec::UnsignedVarint(None), - KEEP_ALIVE_TIMEOUT, - SubstreamKeepAlive::Yes, - ); - } - - #[test] - #[should_panic] - #[cfg(debug_assertions)] - fn duplicate_fallback_protocol() { - let mut manager = TransportManagerBuilder::new().build(); - - manager.register_protocol( - ProtocolName::from("/notif/1"), - vec![ - ProtocolName::from("/notif/1/new"), - ProtocolName::from("/notif/1"), - ], - ProtocolCodec::UnsignedVarint(None), - KEEP_ALIVE_TIMEOUT, - SubstreamKeepAlive::Yes, - ); - manager.register_protocol( - ProtocolName::from("/notif/2"), - vec![ - ProtocolName::from("/notif/2/new"), - ProtocolName::from("/notif/1/new"), - ], - ProtocolCodec::UnsignedVarint(None), - KEEP_ALIVE_TIMEOUT, - SubstreamKeepAlive::Yes, - ); - } - - #[test] - #[should_panic] - #[cfg(debug_assertions)] - fn duplicate_transport() { - let mut manager = TransportManagerBuilder::new().build(); - - manager.register_transport(SupportedTransport::Tcp, Box::new(DummyTransport::new())); - manager.register_transport(SupportedTransport::Tcp, Box::new(DummyTransport::new())); - } - - #[tokio::test] - async fn tried_to_self_using_peer_id() { - let keypair = Keypair::generate(); - let local_peer_id = PeerId::from_public_key(&keypair.public().into()); - let mut manager = TransportManagerBuilder::new().with_keypair(keypair).build(); - - assert!(manager.dial(local_peer_id).await.is_err()); - } - - #[tokio::test] - async fn try_to_dial_over_disabled_transport() { - let mut manager = TransportManagerBuilder::new().build(); - let _handle = manager.transport_handle(Arc::new(DefaultExecutor {})); - manager.register_transport(SupportedTransport::Tcp, Box::new(DummyTransport::new())); - - let address = Multiaddr::empty() - .with(Protocol::Ip4(Ipv4Addr::new(127, 0, 0, 1))) - .with(Protocol::Udp(8888)) - .with(Protocol::QuicV1) - .with(Protocol::P2p( - Multihash::from_bytes(&PeerId::random().to_bytes()).unwrap(), - )); - - assert!(std::matches!( - manager.dial_address(address).await, - Err(Error::TransportNotSupported(_)) - )); - } - - #[tokio::test] - async fn successful_dial_reported_to_transport_manager() { - let _ = tracing_subscriber::fmt() - .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) - .try_init(); - - let mut manager = TransportManagerBuilder::new().build(); - let peer = PeerId::random(); - let dial_address = Multiaddr::empty() - .with(Protocol::Ip4(Ipv4Addr::new(127, 0, 0, 1))) - .with(Protocol::Tcp(8888)) - .with(Protocol::P2p( - Multihash::from_bytes(&peer.to_bytes()).unwrap(), - )); - - let transport = Box::new({ - let mut transport = DummyTransport::new(); - transport.inject_event(TransportEvent::ConnectionEstablished { - peer, - endpoint: Endpoint::dialer(dial_address.clone(), ConnectionId::from(0usize)), - }); - transport - }); - manager.register_transport(SupportedTransport::Tcp, transport); - - assert!(manager.dial_address(dial_address.clone()).await.is_ok()); - assert!(!manager.pending_connections.is_empty()); - - { - let peers = manager.peers.read(); - - match peers.get(&peer) { - Some(PeerContext { - state: PeerState::Dialing { .. }, - .. - }) => {} - state => panic!("invalid state for peer: {state:?}"), - } - } - - match manager.next().await.unwrap() { - TransportEvent::ConnectionEstablished { - peer: event_peer, - endpoint: event_endpoint, - .. - } => { - assert_eq!(peer, event_peer); - assert_eq!( - event_endpoint, - Endpoint::dialer(dial_address.clone(), ConnectionId::from(0usize)) - ) - } - event => panic!("invalid event: {event:?}"), - } - } - - #[tokio::test] - async fn try_to_dial_same_peer_twice() { - let _ = tracing_subscriber::fmt() - .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) - .try_init(); - - let mut manager = TransportManagerBuilder::new().build(); - let _handle = manager.transport_handle(Arc::new(DefaultExecutor {})); - manager.register_transport(SupportedTransport::Tcp, Box::new(DummyTransport::new())); - - let peer = PeerId::random(); - let dial_address = Multiaddr::empty() - .with(Protocol::Ip4(Ipv4Addr::new(127, 0, 0, 1))) - .with(Protocol::Tcp(8888)) - .with(Protocol::P2p( - Multihash::from_bytes(&peer.to_bytes()).unwrap(), - )); - - assert!(manager.dial_address(dial_address.clone()).await.is_ok()); - assert_eq!(manager.pending_connections.len(), 1); - - assert!(manager.dial_address(dial_address.clone()).await.is_ok()); - assert_eq!(manager.pending_connections.len(), 1); - } - - #[tokio::test] - async fn try_to_dial_same_peer_twice_diffrent_address() { - let _ = tracing_subscriber::fmt() - .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) - .try_init(); - - let mut manager = TransportManagerBuilder::new().build(); - let _handle = manager.transport_handle(Arc::new(DefaultExecutor {})); - manager.register_transport(SupportedTransport::Tcp, Box::new(DummyTransport::new())); - - let peer = PeerId::random(); - - assert!(manager - .dial_address( - Multiaddr::empty() - .with(Protocol::Ip4(Ipv4Addr::new(127, 0, 0, 1))) - .with(Protocol::Tcp(8888)) - .with(Protocol::P2p( - Multihash::from_bytes(&peer.to_bytes()).unwrap(), - )) - ) - .await - .is_ok()); - assert_eq!(manager.pending_connections.len(), 1); - - assert!(manager - .dial_address( - Multiaddr::empty() - .with(Protocol::Ip6(Ipv6Addr::new(0, 0, 0, 0, 0, 0, 0, 1))) - .with(Protocol::Tcp(8888)) - .with(Protocol::P2p( - Multihash::from_bytes(&peer.to_bytes()).unwrap(), - )) - ) - .await - .is_ok()); - assert_eq!(manager.pending_connections.len(), 1); - } - - #[tokio::test] - async fn dial_non_existent_peer() { - let _ = tracing_subscriber::fmt() - .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) - .try_init(); - - let mut manager = TransportManagerBuilder::new().build(); - let _handle = manager.transport_handle(Arc::new(DefaultExecutor {})); - manager.register_transport(SupportedTransport::Tcp, Box::new(DummyTransport::new())); - - assert!(manager.dial(PeerId::random()).await.is_err()); - } - - #[tokio::test] - async fn dial_non_peer_with_no_known_addresses() { - let _ = tracing_subscriber::fmt() - .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) - .try_init(); - - let mut manager = TransportManagerBuilder::new().build(); - let _handle = manager.transport_handle(Arc::new(DefaultExecutor {})); - manager.register_transport(SupportedTransport::Tcp, Box::new(DummyTransport::new())); - - let peer = PeerId::random(); - manager.peers.write().insert( - peer, - PeerContext { - state: PeerState::Disconnected { dial_record: None }, - addresses: AddressStore::new(), - }, - ); - - assert!(manager.dial(peer).await.is_err()); - } - - #[tokio::test] - async fn check_supported_transport_when_adding_known_address() { - let _ = tracing_subscriber::fmt() - .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) - .try_init(); - - let mut transports = HashSet::new(); - transports.insert(SupportedTransport::Tcp); - #[cfg(feature = "quic")] - transports.insert(SupportedTransport::Quic); - - let manager = TransportManagerBuilder::new().with_supported_transports(transports).build(); - - let handle = manager.transport_manager_handle; - - // ipv6 - let address = Multiaddr::empty() - .with(Protocol::Ip6(Ipv6Addr::new(0, 0, 0, 0, 0, 0, 0, 1))) - .with(Protocol::Tcp(8888)) - .with(Protocol::P2p( - Multihash::from_bytes(&PeerId::random().to_bytes()).unwrap(), - )); - assert!(handle.supported_transport(&address)); - - // ipv4 - let address = Multiaddr::empty() - .with(Protocol::Ip4(Ipv4Addr::new(127, 0, 0, 1))) - .with(Protocol::Tcp(8888)) - .with(Protocol::P2p( - Multihash::from_bytes(&PeerId::random().to_bytes()).unwrap(), - )); - assert!(handle.supported_transport(&address)); - - // quic - let address = Multiaddr::empty() - .with(Protocol::Ip4(Ipv4Addr::new(127, 0, 0, 1))) - .with(Protocol::Udp(8888)) - .with(Protocol::QuicV1) - .with(Protocol::P2p( - Multihash::from_bytes(&PeerId::random().to_bytes()).unwrap(), - )); - #[cfg(feature = "quic")] - assert!(handle.supported_transport(&address)); - #[cfg(not(feature = "quic"))] - assert!(!handle.supported_transport(&address)); - - // websocket - let address = Multiaddr::empty() - .with(Protocol::Ip4(Ipv4Addr::new(127, 0, 0, 1))) - .with(Protocol::Tcp(8888)) - .with(Protocol::Ws(std::borrow::Cow::Owned("/".to_string()))); - assert!(!handle.supported_transport(&address)); - - // websocket secure - let address = Multiaddr::empty() - .with(Protocol::Ip4(Ipv4Addr::new(127, 0, 0, 1))) - .with(Protocol::Tcp(8888)) - .with(Protocol::Wss(std::borrow::Cow::Owned("/".to_string()))); - assert!(!handle.supported_transport(&address)); - } - - // local node tried to dial a node and it failed but in the mean - // time the remote node dialed local node and that succeeded. - #[tokio::test] - async fn on_dial_failure_already_connected() { - let _ = tracing_subscriber::fmt() - .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) - .try_init(); - - let mut manager = TransportManagerBuilder::new().build(); - let _handle = manager.transport_handle(Arc::new(DefaultExecutor {})); - manager.register_transport(SupportedTransport::Tcp, Box::new(DummyTransport::new())); - - let peer = PeerId::random(); - let dial_address = Multiaddr::empty() - .with(Protocol::Ip4(Ipv4Addr::new(127, 0, 0, 1))) - .with(Protocol::Tcp(8888)) - .with(Protocol::P2p( - Multihash::from_bytes(&peer.to_bytes()).unwrap(), - )); - let connect_address = Multiaddr::empty() - .with(Protocol::Ip4(Ipv4Addr::new(192, 168, 1, 173))) - .with(Protocol::Tcp(8888)) - .with(Protocol::P2p( - Multihash::from_bytes(&peer.to_bytes()).unwrap(), - )); - assert!(manager.dial_address(dial_address.clone()).await.is_ok()); - assert_eq!(manager.pending_connections.len(), 1); - - match &manager.peers.read().get(&peer).unwrap().state { - PeerState::Dialing { dial_record } => { - assert_eq!(dial_record.address, dial_address); - } - state => panic!("invalid state for peer: {state:?}"), - } - - // remote peer connected to local node from a different address that was dialed - manager - .on_connection_established( - peer, - &Endpoint::dialer(connect_address, ConnectionId::from(1usize)), - ) - .unwrap(); - - // dialing the peer failed - manager.on_dial_failure(ConnectionId::from(0usize)).unwrap(); - - let peers = manager.peers.read(); - let peer = peers.get(&peer).unwrap(); - - match &peer.state { - PeerState::Connected { secondary, .. } => { - assert!(secondary.is_none()); - assert!(peer.addresses.addresses.contains_key(&dial_address)); - } - state => panic!("invalid state: {state:?}"), - } - } - - // local node tried to dial a node and it failed but in the mean - // time the remote node dialed local node and that succeeded. - // - // while the dial was still in progresss, the remote node disconnected after which - // the dial failure was reported. - #[tokio::test] - async fn on_dial_failure_already_connected_and_disconnected() { - let _ = tracing_subscriber::fmt() - .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) - .try_init(); - - let mut manager = TransportManagerBuilder::new().build(); - let _handle = manager.transport_handle(Arc::new(DefaultExecutor {})); - manager.register_transport(SupportedTransport::Tcp, Box::new(DummyTransport::new())); - - let peer = PeerId::random(); - let dial_address = Multiaddr::empty() - .with(Protocol::Ip4(Ipv4Addr::new(127, 0, 0, 1))) - .with(Protocol::Tcp(8888)) - .with(Protocol::P2p( - Multihash::from_bytes(&peer.to_bytes()).unwrap(), - )); - let connect_address = Multiaddr::empty() - .with(Protocol::Ip4(Ipv4Addr::new(192, 168, 1, 173))) - .with(Protocol::Tcp(8888)) - .with(Protocol::P2p( - Multihash::from_bytes(&peer.to_bytes()).unwrap(), - )); - assert!(manager.dial_address(dial_address.clone()).await.is_ok()); - assert_eq!(manager.pending_connections.len(), 1); - - match &manager.peers.read().get(&peer).unwrap().state { - PeerState::Dialing { dial_record } => { - assert_eq!(dial_record.address, dial_address); - } - state => panic!("invalid state for peer: {state:?}"), - } - - // remote peer connected to local node from a different address that was dialed - manager - .on_connection_established( - peer, - &Endpoint::listener(connect_address, ConnectionId::from(1usize)), - ) - .unwrap(); - - // connection to remote was closed while the dial was still in progress - manager.on_connection_closed(peer, ConnectionId::from(1usize)).unwrap(); - - // verify that the peer state is `Disconnected` - { - let peers = manager.peers.read(); - let peer = peers.get(&peer).unwrap(); - - match &peer.state { - PeerState::Disconnected { - dial_record: Some(dial_record), - .. - } => { - assert_eq!(dial_record.address, dial_address); - } - state => panic!("invalid state: {state:?}"), - } - } - - // dialing the peer failed - manager.on_dial_failure(ConnectionId::from(0usize)).unwrap(); - - let peers = manager.peers.read(); - let peer = peers.get(&peer).unwrap(); - - match &peer.state { - PeerState::Disconnected { - dial_record: None, .. - } => { - assert!(peer.addresses.addresses.contains_key(&dial_address)); - } - state => panic!("invalid state: {state:?}"), - } - } - - // local node tried to dial a node and it failed but in the mean - // time the remote node dialed local node and that succeeded. - // - // while the dial was still in progresss, the remote node disconnected after which - // the dial failure was reported. - #[tokio::test] - async fn on_dial_success_while_connected_and_disconnected() { - let _ = tracing_subscriber::fmt() - .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) - .try_init(); - - let mut manager = TransportManagerBuilder::new().build(); - let _handle = manager.transport_handle(Arc::new(DefaultExecutor {})); - manager.register_transport(SupportedTransport::Tcp, Box::new(DummyTransport::new())); - - let peer = PeerId::random(); - let dial_address = Multiaddr::empty() - .with(Protocol::Ip4(Ipv4Addr::new(127, 0, 0, 1))) - .with(Protocol::Tcp(8888)) - .with(Protocol::P2p( - Multihash::from_bytes(&peer.to_bytes()).unwrap(), - )); - let connect_address = Multiaddr::empty() - .with(Protocol::Ip4(Ipv4Addr::new(192, 168, 1, 173))) - .with(Protocol::Tcp(8888)) - .with(Protocol::P2p( - Multihash::from_bytes(&peer.to_bytes()).unwrap(), - )); - assert!(manager.dial_address(dial_address.clone()).await.is_ok()); - assert_eq!(manager.pending_connections.len(), 1); - - match &manager.peers.read().get(&peer).unwrap().state { - PeerState::Dialing { dial_record } => { - assert_eq!(dial_record.address, dial_address); - } - state => panic!("invalid state for peer: {state:?}"), - } - - // remote peer connected to local node from a different address that was dialed - manager - .on_connection_established( - peer, - &Endpoint::listener(connect_address, ConnectionId::from(1usize)), - ) - .unwrap(); - - // connection to remote was closed while the dial was still in progress - manager.on_connection_closed(peer, ConnectionId::from(1usize)).unwrap(); - - // verify that the peer state is `Disconnected` - { - let peers = manager.peers.read(); - let peer = peers.get(&peer).unwrap(); - - match &peer.state { - PeerState::Disconnected { - dial_record: Some(dial_record), - .. - } => { - assert_eq!(dial_record.address, dial_address); - } - state => panic!("invalid state: {state:?}"), - } - } - - // the original dial succeeded - manager - .on_connection_established( - peer, - &Endpoint::dialer(dial_address, ConnectionId::from(0usize)), - ) - .unwrap(); - - let peers = manager.peers.read(); - let peer = peers.get(&peer).unwrap(); - - match &peer.state { - PeerState::Connected { - secondary: None, .. - } => {} - state => panic!("invalid state: {state:?}"), - } - } - - #[tokio::test] - async fn secondary_connection_is_tracked() { - let _ = tracing_subscriber::fmt() - .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) - .try_init(); - - let mut manager = TransportManagerBuilder::new().build(); - manager.register_transport(SupportedTransport::Tcp, Box::new(DummyTransport::new())); - - let peer = PeerId::random(); - let address1 = Multiaddr::empty() - .with(Protocol::Ip4(Ipv4Addr::new(127, 0, 0, 1))) - .with(Protocol::Tcp(8888)) - .with(Protocol::P2p( - Multihash::from_bytes(&peer.to_bytes()).unwrap(), - )); - let address2 = Multiaddr::empty() - .with(Protocol::Ip4(Ipv4Addr::new(192, 168, 1, 173))) - .with(Protocol::Tcp(8888)) - .with(Protocol::P2p( - Multihash::from_bytes(&peer.to_bytes()).unwrap(), - )); - let address3 = Multiaddr::empty() - .with(Protocol::Ip4(Ipv4Addr::new(192, 168, 10, 64))) - .with(Protocol::Tcp(9999)) - .with(Protocol::P2p( - Multihash::from_bytes(&peer.to_bytes()).unwrap(), - )); - - // remote peer connected to local node - let established_result = manager - .on_connection_established( - peer, - &Endpoint::dialer(address1.clone(), ConnectionId::from(0usize)), - ) - .unwrap(); - assert_eq!(established_result, ConnectionEstablishedResult::Accept); - - // verify that the peer state is `Connected` with no secondary connection - { - let peers = manager.peers.read(); - let peer = peers.get(&peer).unwrap(); - - match &peer.state { - PeerState::Connected { - secondary: None, .. - } => {} - state => panic!("invalid state: {state:?}"), - } - } - - // second connection is established, verify that the secondary connection is tracked - let established_result = manager - .on_connection_established( - peer, - &Endpoint::listener(address2.clone(), ConnectionId::from(1usize)), - ) - .unwrap(); - assert_eq!(established_result, ConnectionEstablishedResult::Accept); - - let peers = manager.peers.read(); - let context = peers.get(&peer).unwrap(); - - match &context.state { - PeerState::Connected { - secondary: Some(SecondaryOrDialing::Secondary(secondary_connection)), - .. - } => { - assert_eq!(secondary_connection.address, address2); - } - state => panic!("invalid state: {state:?}"), - } - drop(peers); - - // tertiary connection is ignored - let established_result = manager - .on_connection_established( - peer, - &Endpoint::listener(address3.clone(), ConnectionId::from(2usize)), - ) - .unwrap(); - assert_eq!(established_result, ConnectionEstablishedResult::Reject); - - let peers = manager.peers.read(); - let peer = peers.get(&peer).unwrap(); - - match &peer.state { - PeerState::Connected { - secondary: Some(SecondaryOrDialing::Secondary(secondary_connection)), - .. - } => { - assert_eq!(secondary_connection.address, address2); - // Endpoint::listener addresses are not tracked. - assert!(!peer.addresses.addresses.contains_key(&address2)); - assert!(!peer.addresses.addresses.contains_key(&address3)); - assert_eq!( - peer.addresses.addresses.get(&address1).unwrap().score(), - scores::CONNECTION_ESTABLISHED - ); - } - state => panic!("invalid state: {state:?}"), - } - } - #[tokio::test] - async fn secondary_connection_with_different_dial_endpoint_is_rejected() { - let _ = tracing_subscriber::fmt() - .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) - .try_init(); - - let mut manager = TransportManagerBuilder::new().build(); - manager.register_transport(SupportedTransport::Tcp, Box::new(DummyTransport::new())); - - let peer = PeerId::random(); - let address1 = Multiaddr::empty() - .with(Protocol::Ip4(Ipv4Addr::new(127, 0, 0, 1))) - .with(Protocol::Tcp(8888)) - .with(Protocol::P2p( - Multihash::from_bytes(&peer.to_bytes()).unwrap(), - )); - let address2 = Multiaddr::empty() - .with(Protocol::Ip4(Ipv4Addr::new(192, 168, 1, 173))) - .with(Protocol::Tcp(8888)) - .with(Protocol::P2p( - Multihash::from_bytes(&peer.to_bytes()).unwrap(), - )); - - // remote peer connected to local node - let established_result = manager - .on_connection_established( - peer, - &Endpoint::listener(address1, ConnectionId::from(0usize)), - ) - .unwrap(); - assert_eq!(established_result, ConnectionEstablishedResult::Accept); - - // verify that the peer state is `Connected` with no secondary connection - { - let peers = manager.peers.read(); - let peer = peers.get(&peer).unwrap(); - - match &peer.state { - PeerState::Connected { - secondary: None, .. - } => {} - state => panic!("invalid state: {state:?}"), - } - } - - // Add a dial record for the peer. - { - let mut peers = manager.peers.write(); - let peer_context = peers.get_mut(&peer).unwrap(); - - let record = match &peer_context.state { - PeerState::Connected { record, .. } => record.clone(), - state => panic!("invalid state: {state:?}"), - }; - - let dial_record = ConnectionRecord::new(peer, address2.clone(), ConnectionId::from(0)); - peer_context.state = PeerState::Connected { - record, - secondary: Some(SecondaryOrDialing::Dialing(dial_record)), - }; - } - - // second connection is from a different endpoint should fail. - let established_result = manager - .on_connection_established( - peer, - &Endpoint::listener(address2.clone(), ConnectionId::from(1usize)), - ) - .unwrap(); - assert_eq!(established_result, ConnectionEstablishedResult::Reject); - - // Multiple secondary connections should also fail. - let established_result = manager - .on_connection_established( - peer, - &Endpoint::listener(address2.clone(), ConnectionId::from(1usize)), - ) - .unwrap(); - assert_eq!(established_result, ConnectionEstablishedResult::Reject); - - // Accept the proper connection ID. - let established_result = manager - .on_connection_established( - peer, - &Endpoint::listener(address2.clone(), ConnectionId::from(0usize)), - ) - .unwrap(); - assert_eq!(established_result, ConnectionEstablishedResult::Accept); - } - - #[tokio::test] - async fn secondary_connection_closed() { - let _ = tracing_subscriber::fmt() - .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) - .try_init(); - - let mut manager = TransportManagerBuilder::new().build(); - manager.register_transport(SupportedTransport::Tcp, Box::new(DummyTransport::new())); - - let peer = PeerId::random(); - let address1 = Multiaddr::empty() - .with(Protocol::Ip4(Ipv4Addr::new(127, 0, 0, 1))) - .with(Protocol::Tcp(8888)) - .with(Protocol::P2p( - Multihash::from_bytes(&peer.to_bytes()).unwrap(), - )); - let address2 = Multiaddr::empty() - .with(Protocol::Ip4(Ipv4Addr::new(192, 168, 1, 173))) - .with(Protocol::Tcp(8888)) - .with(Protocol::P2p( - Multihash::from_bytes(&peer.to_bytes()).unwrap(), - )); - - // remote peer connected to local node - let emit_event = manager - .on_connection_established( - peer, - &Endpoint::listener(address1, ConnectionId::from(0usize)), - ) - .unwrap(); - assert!(std::matches!( - emit_event, - ConnectionEstablishedResult::Accept - )); - - // verify that the peer state is `Connected` with no seconary connection - { - let peers = manager.peers.read(); - let peer = peers.get(&peer).unwrap(); - - match &peer.state { - PeerState::Connected { - record, - secondary: None, - .. - } => { - // Primary connection is established. - assert_eq!(record.connection_id, ConnectionId::from(0usize)); - } - state => panic!("invalid state: {state:?}"), - } - } - - // second connection is established, verify that the secondary connection is tracked - let emit_event = manager - .on_connection_established( - peer, - &Endpoint::dialer(address2.clone(), ConnectionId::from(1usize)), - ) - .unwrap(); - assert!(std::matches!( - emit_event, - ConnectionEstablishedResult::Accept - )); - - let peers = manager.peers.read(); - let context = peers.get(&peer).unwrap(); - - match &context.state { - PeerState::Connected { - secondary: Some(SecondaryOrDialing::Secondary(secondary_connection)), - .. - } => { - assert_eq!(secondary_connection.address, address2); - } - state => panic!("invalid state: {state:?}"), - } - drop(peers); - - // close the secondary connection and verify that the peer remains connected - let emit_event = manager.on_connection_closed(peer, ConnectionId::from(1usize)); - assert!(emit_event.is_none()); - - let peers = manager.peers.read(); - let context = peers.get(&peer).unwrap(); - - match &context.state { - PeerState::Connected { - secondary: None, - record, - } => { - assert!(context.addresses.addresses.contains_key(&address2)); - assert_eq!( - context.addresses.addresses.get(&address2).unwrap().score(), - scores::CONNECTION_ESTABLISHED - ); - // Primary remains opened. - assert_eq!(record.connection_id, ConnectionId::from(0usize)); - } - state => panic!("invalid state: {state:?}"), - } - } - - #[tokio::test] - async fn switch_to_secondary_connection() { - let _ = tracing_subscriber::fmt() - .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) - .try_init(); - - let mut manager = TransportManagerBuilder::new().build(); - manager.register_transport(SupportedTransport::Tcp, Box::new(DummyTransport::new())); - - let peer = PeerId::random(); - let address1 = Multiaddr::empty() - .with(Protocol::Ip4(Ipv4Addr::new(127, 0, 0, 1))) - .with(Protocol::Tcp(8888)) - .with(Protocol::P2p( - Multihash::from_bytes(&peer.to_bytes()).unwrap(), - )); - let address2 = Multiaddr::empty() - .with(Protocol::Ip4(Ipv4Addr::new(192, 168, 1, 173))) - .with(Protocol::Tcp(8888)) - .with(Protocol::P2p( - Multihash::from_bytes(&peer.to_bytes()).unwrap(), - )); - - // remote peer connected to local node - let emit_event = manager - .on_connection_established( - peer, - &Endpoint::listener(address1.clone(), ConnectionId::from(0usize)), - ) - .unwrap(); - assert!(std::matches!( - emit_event, - ConnectionEstablishedResult::Accept - )); - - // verify that the peer state is `Connected` with no secondary connection - { - let peers = manager.peers.read(); - let peer = peers.get(&peer).unwrap(); - - match &peer.state { - PeerState::Connected { - secondary: None, .. - } => {} - state => panic!("invalid state: {state:?}"), - } - } - - // second connection is established, verify that the secondary connection is tracked - let emit_event = manager - .on_connection_established( - peer, - &Endpoint::dialer(address2.clone(), ConnectionId::from(1usize)), - ) - .unwrap(); - assert!(std::matches!( - emit_event, - ConnectionEstablishedResult::Accept - )); - - let peers = manager.peers.read(); - let context = peers.get(&peer).unwrap(); - - match &context.state { - PeerState::Connected { - secondary: Some(SecondaryOrDialing::Secondary(secondary_connection)), - .. - } => { - assert_eq!(secondary_connection.address, address2); - } - state => panic!("invalid state: {state:?}"), - } - drop(peers); - - // close the primary connection and verify that the peer remains connected - // while the primary connection address is stored in peer addresses - let emit_event = manager.on_connection_closed(peer, ConnectionId::from(0usize)); - assert!(emit_event.is_none()); - - let peers = manager.peers.read(); - let context = peers.get(&peer).unwrap(); - - match &context.state { - PeerState::Connected { - secondary: None, - record, - } => { - assert!(!context.addresses.addresses.contains_key(&address1)); - assert!(context.addresses.addresses.contains_key(&address2)); - assert_eq!(record.connection_id, ConnectionId::from(1usize)); - } - state => panic!("invalid state: {state:?}"), - } - } - - // two connections already exist and a third was opened which is ignored by - // `on_connection_established()`, when that connection is closed, verify that - // it's handled gracefully - #[tokio::test] - async fn tertiary_connection_closed() { - let _ = tracing_subscriber::fmt() - .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) - .try_init(); - - let mut manager = TransportManagerBuilder::new().build(); - manager.register_transport(SupportedTransport::Tcp, Box::new(DummyTransport::new())); - - let peer = PeerId::random(); - let address1 = Multiaddr::empty() - .with(Protocol::Ip4(Ipv4Addr::new(127, 0, 0, 1))) - .with(Protocol::Tcp(8888)) - .with(Protocol::P2p( - Multihash::from_bytes(&peer.to_bytes()).unwrap(), - )); - let address2 = Multiaddr::empty() - .with(Protocol::Ip4(Ipv4Addr::new(192, 168, 1, 173))) - .with(Protocol::Tcp(8888)) - .with(Protocol::P2p( - Multihash::from_bytes(&peer.to_bytes()).unwrap(), - )); - let address3 = Multiaddr::empty() - .with(Protocol::Ip4(Ipv4Addr::new(192, 168, 1, 173))) - .with(Protocol::Tcp(9999)) - .with(Protocol::P2p( - Multihash::from_bytes(&peer.to_bytes()).unwrap(), - )); - - // remote peer connected to local node - let emit_event = manager - .on_connection_established( - peer, - &Endpoint::listener(address1.clone(), ConnectionId::from(0usize)), - ) - .unwrap(); - assert!(std::matches!( - emit_event, - ConnectionEstablishedResult::Accept - )); - - // The address1 should be ignored because it is an inbound connection - // initiated from an ephemeral port. - let peers = manager.peers.read(); - let context = peers.get(&peer).unwrap(); - assert!(!context.addresses.addresses.contains_key(&address1)); - drop(peers); - - // verify that the peer state is `Connected` with no seconary connection - { - let peers = manager.peers.read(); - let peer = peers.get(&peer).unwrap(); - - match &peer.state { - PeerState::Connected { - secondary: None, .. - } => {} - state => panic!("invalid state: {state:?}"), - } - } - - // second connection is established, verify that the seconary connection is tracked - let emit_event = manager - .on_connection_established( - peer, - &Endpoint::dialer(address2.clone(), ConnectionId::from(1usize)), - ) - .unwrap(); - assert!(std::matches!( - emit_event, - ConnectionEstablishedResult::Accept - )); - - // Ensure we keep track of this address. - let peers = manager.peers.read(); - let context = peers.get(&peer).unwrap(); - assert!(context.addresses.addresses.contains_key(&address2)); - drop(peers); - - let peers = manager.peers.read(); - let context = peers.get(&peer).unwrap(); - - match &context.state { - PeerState::Connected { - secondary: Some(SecondaryOrDialing::Secondary(secondary_connection)), - .. - } => { - assert_eq!(secondary_connection.address, address2); - } - state => panic!("invalid state: {state:?}"), - } - drop(peers); - - // third connection is established, verify that it's discarded - let emit_event = manager - .on_connection_established( - peer, - &Endpoint::listener(address3.clone(), ConnectionId::from(2usize)), - ) - .unwrap(); - assert!(std::matches!( - emit_event, - ConnectionEstablishedResult::Reject - )); - - let peers = manager.peers.read(); - let context = peers.get(&peer).unwrap(); - // The tertiary connection should be ignored because it is an inbound connection - // initiated from an ephemeral port. - assert!(!context.addresses.addresses.contains_key(&address3)); - drop(peers); - - // close the tertiary connection that was ignored - let emit_event = manager.on_connection_closed(peer, ConnectionId::from(2usize)); - assert!(emit_event.is_none()); - - // verify that the state remains unchanged - let peers = manager.peers.read(); - let context = peers.get(&peer).unwrap(); - - match &context.state { - PeerState::Connected { - secondary: Some(SecondaryOrDialing::Secondary(secondary_connection)), - .. - } => { - assert_eq!(secondary_connection.address, address2); - assert_eq!( - context.addresses.addresses.get(&address2).unwrap().score(), - scores::CONNECTION_ESTABLISHED - ); - } - state => panic!("invalid state: {state:?}"), - } - - drop(peers); - } - #[tokio::test] - #[cfg(debug_assertions)] - #[should_panic] - async fn dial_failure_for_unknow_connection() { - let _ = tracing_subscriber::fmt() - .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) - .try_init(); - - let mut manager = TransportManagerBuilder::new().build(); - - manager.on_dial_failure(ConnectionId::random()).unwrap(); - } - - #[tokio::test] - #[cfg(debug_assertions)] - #[should_panic] - async fn connection_closed_for_unknown_peer() { - let _ = tracing_subscriber::fmt() - .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) - .try_init(); - - let mut manager = TransportManagerBuilder::new().build(); - manager.on_connection_closed(PeerId::random(), ConnectionId::random()).unwrap(); - } - - #[tokio::test] - #[cfg(debug_assertions)] - #[should_panic] - async fn unknown_connection_opened() { - let _ = tracing_subscriber::fmt() - .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) - .try_init(); - - let mut manager = TransportManagerBuilder::new().build(); - manager - .on_connection_opened( - SupportedTransport::Tcp, - ConnectionId::random(), - Multiaddr::empty(), - ) - .unwrap(); - } - - #[tokio::test] - #[cfg(debug_assertions)] - #[should_panic] - async fn connection_opened_for_unknown_peer() { - let _ = tracing_subscriber::fmt() - .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) - .try_init(); - - let mut manager = TransportManagerBuilder::new().build(); - let connection_id = ConnectionId::random(); - let peer = PeerId::random(); - - manager.pending_connections.insert(connection_id, peer); - manager - .on_connection_opened(SupportedTransport::Tcp, connection_id, Multiaddr::empty()) - .unwrap(); - } - - #[tokio::test] - #[cfg(debug_assertions)] - #[should_panic] - async fn connection_established_for_wrong_peer() { - let _ = tracing_subscriber::fmt() - .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) - .try_init(); - - let mut manager = TransportManagerBuilder::new().build(); - let connection_id = ConnectionId::random(); - let peer = PeerId::random(); - - manager.pending_connections.insert(connection_id, peer); - manager - .on_connection_established( - PeerId::random(), - &Endpoint::dialer(Multiaddr::empty(), connection_id), - ) - .unwrap(); - } - - #[tokio::test] - #[cfg(debug_assertions)] - #[should_panic] - async fn open_failure_unknown_connection() { - let _ = tracing_subscriber::fmt() - .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) - .try_init(); - - let mut manager = TransportManagerBuilder::new().build(); - - manager - .on_open_failure(SupportedTransport::Tcp, ConnectionId::random()) - .unwrap(); - } - - #[tokio::test] - #[cfg(debug_assertions)] - #[should_panic] - async fn open_failure_unknown_peer() { - let _ = tracing_subscriber::fmt() - .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) - .try_init(); - - let mut manager = TransportManagerBuilder::new().build(); - let connection_id = ConnectionId::random(); - let peer = PeerId::random(); - - manager.pending_connections.insert(connection_id, peer); - manager.on_open_failure(SupportedTransport::Tcp, connection_id).unwrap(); - } - - #[tokio::test] - async fn no_transports() { - let _ = tracing_subscriber::fmt() - .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) - .try_init(); - - let mut manager = TransportManagerBuilder::new().build(); - - assert!(manager.next().await.is_none()); - } - - #[tokio::test] - async fn dial_already_connected_peer() { - let mut manager = TransportManagerBuilder::new().build(); - - let peer = { - let peer = PeerId::random(); - let mut peers = manager.peers.write(); - - peers.insert( - peer, - PeerContext { - state: PeerState::Connected { - record: ConnectionRecord { - address: Multiaddr::empty() - .with(Protocol::Ip4(std::net::Ipv4Addr::new(127, 0, 0, 1))) - .with(Protocol::Tcp(8888)) - .with(Protocol::P2p(Multihash::from(peer))), - connection_id: ConnectionId::from(0usize), - }, - secondary: None, - }, - - addresses: AddressStore::from_iter( - vec![Multiaddr::empty() - .with(Protocol::Ip4(std::net::Ipv4Addr::new(127, 0, 0, 1))) - .with(Protocol::Tcp(8888)) - .with(Protocol::P2p(Multihash::from(peer)))] - .into_iter(), - ), - }, - ); - drop(peers); - - peer - }; - - match manager.dial(peer).await { - Err(Error::AlreadyConnected) => {} - _ => panic!("invalid return value"), - } - } - - #[tokio::test] - async fn peer_already_being_dialed() { - let mut manager = TransportManagerBuilder::new().build(); - - let peer = { - let peer = PeerId::random(); - let mut peers = manager.peers.write(); - - peers.insert( - peer, - PeerContext { - state: PeerState::Dialing { - dial_record: ConnectionRecord { - address: Multiaddr::empty() - .with(Protocol::Ip4(std::net::Ipv4Addr::new(127, 0, 0, 1))) - .with(Protocol::Tcp(8888)) - .with(Protocol::P2p(Multihash::from(peer))), - connection_id: ConnectionId::from(0usize), - }, - }, - - addresses: AddressStore::from_iter( - vec![Multiaddr::empty() - .with(Protocol::Ip4(std::net::Ipv4Addr::new(127, 0, 0, 1))) - .with(Protocol::Tcp(8888)) - .with(Protocol::P2p(Multihash::from(peer)))] - .into_iter(), - ), - }, - ); - drop(peers); - - peer - }; - - manager.dial(peer).await.unwrap(); - - // Check state is unaltered. - { - let peers = manager.peers.read(); - let peer_context = peers.get(&peer).unwrap(); - - match &peer_context.state { - PeerState::Dialing { dial_record } => { - assert_eq!( - dial_record.address, - Multiaddr::empty() - .with(Protocol::Ip4(std::net::Ipv4Addr::new(127, 0, 0, 1))) - .with(Protocol::Tcp(8888)) - .with(Protocol::P2p(Multihash::from(peer))) - ); - } - state => panic!("invalid state: {state:?}"), - } - } - } - - #[tokio::test] - async fn pending_connection_for_disconnected_peer() { - let mut manager = TransportManagerBuilder::new().build(); - - let peer = { - let peer = PeerId::random(); - let mut peers = manager.peers.write(); - - peers.insert( - peer, - PeerContext { - state: PeerState::Disconnected { - dial_record: Some(ConnectionRecord::new( - peer, - Multiaddr::empty() - .with(Protocol::Ip4(std::net::Ipv4Addr::new(127, 0, 0, 1))) - .with(Protocol::Tcp(8888)) - .with(Protocol::P2p(Multihash::from(peer))), - ConnectionId::from(0), - )), - }, - - addresses: AddressStore::new(), - }, - ); - drop(peers); - - peer - }; - - manager.dial(peer).await.unwrap(); - } - - #[tokio::test] - async fn dial_address_invalid_transport() { - let _ = tracing_subscriber::fmt() - .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) - .try_init(); - - let mut manager = TransportManagerBuilder::new().build(); - - // transport doesn't start with ip/dns - { - let address = Multiaddr::empty().with(Protocol::P2p(Multihash::from(PeerId::random()))); - match manager.dial_address(address.clone()).await { - Err(Error::TransportNotSupported(dial_address)) => { - assert_eq!(dial_address, address); - } - _ => panic!("invalid return value"), - } - } - - { - // upd-based protocol but not quic - let address = Multiaddr::empty() - .with(Protocol::Ip4(std::net::Ipv4Addr::new(127, 0, 0, 1))) - .with(Protocol::Udp(8888)) - .with(Protocol::Utp) - .with(Protocol::P2p(Multihash::from(PeerId::random()))); - match manager.dial_address(address.clone()).await { - Err(Error::TransportNotSupported(dial_address)) => { - assert_eq!(dial_address, address); - } - res => panic!("invalid return value: {res:?}"), - } - } - - // not tcp nor udp - { - let address = Multiaddr::empty() - .with(Protocol::Ip4(std::net::Ipv4Addr::new(127, 0, 0, 1))) - .with(Protocol::Sctp(8888)) - .with(Protocol::P2p(Multihash::from(PeerId::random()))); - match manager.dial_address(address.clone()).await { - Err(Error::TransportNotSupported(dial_address)) => { - assert_eq!(dial_address, address); - } - _ => panic!("invalid return value"), - } - } - - // random protocol after tcp - { - let address = Multiaddr::empty() - .with(Protocol::Ip4(std::net::Ipv4Addr::new(127, 0, 0, 1))) - .with(Protocol::Tcp(8888)) - .with(Protocol::Utp) - .with(Protocol::P2p(Multihash::from(PeerId::random()))); - match manager.dial_address(address.clone()).await { - Err(Error::TransportNotSupported(dial_address)) => { - assert_eq!(dial_address, address); - } - _ => panic!("invalid return value"), - } - } - } - - #[tokio::test] - async fn dial_address_peer_id_missing() { - let mut manager = TransportManagerBuilder::new().build(); - - async fn call_manager(manager: &mut TransportManager, address: Multiaddr) { - match manager.dial_address(address).await { - Err(Error::AddressError(AddressError::PeerIdMissing)) => {} - _ => panic!("invalid return value"), - } - } - - { - call_manager( - &mut manager, - Multiaddr::empty() - .with(Protocol::Ip4(std::net::Ipv4Addr::new(127, 0, 0, 1))) - .with(Protocol::Tcp(8888)), - ) - .await; - } - - { - call_manager( - &mut manager, - Multiaddr::empty() - .with(Protocol::Ip4(std::net::Ipv4Addr::new(127, 0, 0, 1))) - .with(Protocol::Tcp(8888)) - .with(Protocol::Wss(std::borrow::Cow::Owned("".to_string()))), - ) - .await; - } - - { - call_manager( - &mut manager, - Multiaddr::empty() - .with(Protocol::Ip4(std::net::Ipv4Addr::new(127, 0, 0, 1))) - .with(Protocol::Udp(8888)) - .with(Protocol::QuicV1), - ) - .await; - } - } - - #[tokio::test] - async fn inbound_connection_while_dialing() { - let _ = tracing_subscriber::fmt() - .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) - .try_init(); - - let mut manager = TransportManagerBuilder::new().build(); - let peer = PeerId::random(); - let dial_address = Multiaddr::empty() - .with(Protocol::Ip4(Ipv4Addr::new(127, 0, 0, 1))) - .with(Protocol::Tcp(8888)) - .with(Protocol::P2p( - Multihash::from_bytes(&peer.to_bytes()).unwrap(), - )); - - let connection_id = ConnectionId::random(); - let transport = Box::new({ - let mut transport = DummyTransport::new(); - transport.inject_event(TransportEvent::ConnectionEstablished { - peer, - endpoint: Endpoint::listener(dial_address.clone(), connection_id), - }); - transport - }); - manager.register_transport(SupportedTransport::Tcp, transport); - manager.add_known_address( - peer, - vec![Multiaddr::empty() - .with(Protocol::Ip4(Ipv4Addr::new(192, 168, 1, 5))) - .with(Protocol::Tcp(8888)) - .with(Protocol::P2p(Multihash::from(peer)))] - .into_iter(), - ); - - assert!(manager.dial(peer).await.is_ok()); - assert!(!manager.pending_connections.is_empty()); - - { - let peers = manager.peers.read(); - - match peers.get(&peer) { - Some(PeerContext { - state: PeerState::Opening { .. }, - .. - }) => {} - state => panic!("invalid state for peer: {state:?}"), - } - } - - match manager.next().await.unwrap() { - TransportEvent::ConnectionEstablished { - peer: event_peer, - endpoint: event_endpoint, - .. - } => { - assert_eq!(peer, event_peer); - assert_eq!( - event_endpoint, - Endpoint::listener(dial_address.clone(), connection_id), - ); - } - event => panic!("invalid event: {event:?}"), - } - assert!(manager.pending_connections.is_empty()); - - let peers = manager.peers.read(); - match peers.get(&peer).unwrap() { - PeerContext { - state: PeerState::Connected { record, secondary }, - addresses, - } => { - assert!(!addresses.addresses.contains_key(&record.address)); - assert!(secondary.is_none()); - assert_eq!(record.address, dial_address); - assert_eq!(record.connection_id, connection_id); - } - state => panic!("invalid peer state: {state:?}"), - } - } - - #[tokio::test] - async fn inbound_connection_for_same_address_while_dialing() { - let _ = tracing_subscriber::fmt() - .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) - .try_init(); - - let mut manager = TransportManagerBuilder::new().build(); - let peer = PeerId::random(); - let dial_address = Multiaddr::empty() - .with(Protocol::Ip4(Ipv4Addr::new(127, 0, 0, 1))) - .with(Protocol::Tcp(8888)) - .with(Protocol::P2p( - Multihash::from_bytes(&peer.to_bytes()).unwrap(), - )); - - let connection_id = ConnectionId::random(); - let transport = Box::new({ - let mut transport = DummyTransport::new(); - transport.inject_event(TransportEvent::ConnectionEstablished { - peer, - endpoint: Endpoint::listener(dial_address.clone(), connection_id), - }); - transport - }); - manager.register_transport(SupportedTransport::Tcp, transport); - manager.add_known_address( - peer, - vec![Multiaddr::empty() - .with(Protocol::Ip4(Ipv4Addr::new(127, 0, 0, 1))) - .with(Protocol::Tcp(8888)) - .with(Protocol::P2p(Multihash::from(peer)))] - .into_iter(), - ); - - assert!(manager.dial(peer).await.is_ok()); - assert!(!manager.pending_connections.is_empty()); - - { - let peers = manager.peers.read(); - - match peers.get(&peer) { - Some(PeerContext { - state: PeerState::Opening { .. }, - .. - }) => {} - state => panic!("invalid state for peer: {state:?}"), - } - } - - match manager.next().await.unwrap() { - TransportEvent::ConnectionEstablished { - peer: event_peer, - endpoint: event_endpoint, - .. - } => { - assert_eq!(peer, event_peer); - assert_eq!( - event_endpoint, - Endpoint::listener(dial_address.clone(), connection_id), - ); - } - event => panic!("invalid event: {event:?}"), - } - assert!(manager.pending_connections.is_empty()); - - let peers = manager.peers.read(); - match peers.get(&peer).unwrap() { - PeerContext { - state: PeerState::Connected { record, secondary }, - addresses, - } => { - // Saved from the dial attempt. - assert_eq!(addresses.addresses.get(&dial_address).unwrap().score(), 0); - - assert!(secondary.is_none()); - assert_eq!(record.address, dial_address); - assert_eq!(record.connection_id, connection_id); - } - state => panic!("invalid peer state: {state:?}"), - } - } - - #[tokio::test] - async fn manager_limits_incoming_connections() { - let _ = tracing_subscriber::fmt() - .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) - .try_init(); - - let mut manager = TransportManagerBuilder::new() - .with_connection_limits_config( - ConnectionLimitsConfig::default() - .max_incoming_connections(Some(3)) - .max_outgoing_connections(Some(2)), - ) - .build(); - // The connection limit is agnostic of the underlying transports. - manager.register_transport(SupportedTransport::Tcp, Box::new(DummyTransport::new())); - - let peer = PeerId::random(); - let second_peer = PeerId::random(); - - // Setup addresses. - let (first_addr, first_connection_id) = setup_dial_addr(peer, 0); - let (second_addr, second_connection_id) = setup_dial_addr(second_peer, 1); - let (_, third_connection_id) = setup_dial_addr(peer, 2); - let (_, remote_connection_id) = setup_dial_addr(peer, 3); - - // Peer established the first inbound connection. - let result = manager - .on_connection_established( - peer, - &Endpoint::listener(first_addr.clone(), first_connection_id), - ) - .unwrap(); - assert_eq!(result, ConnectionEstablishedResult::Accept); - - // The peer is allowed to dial us a second time. - let result = manager - .on_connection_established( - peer, - &Endpoint::listener(first_addr.clone(), second_connection_id), - ) - .unwrap(); - assert_eq!(result, ConnectionEstablishedResult::Accept); - - // Second peer calls us. - let result = manager - .on_connection_established( - second_peer, - &Endpoint::listener(second_addr.clone(), third_connection_id), - ) - .unwrap(); - assert_eq!(result, ConnectionEstablishedResult::Accept); - - // Limits of inbound connections are reached. - let result = manager - .on_connection_established( - second_peer, - &Endpoint::listener(second_addr.clone(), remote_connection_id), - ) - .unwrap(); - assert_eq!(result, ConnectionEstablishedResult::Reject); - - // Close one connection. - assert!(manager.on_connection_closed(peer, first_connection_id).is_none()); - - // The second peer can establish 2 inbounds now. - let result = manager - .on_connection_established( - second_peer, - &Endpoint::listener(second_addr.clone(), remote_connection_id), - ) - .unwrap(); - assert_eq!(result, ConnectionEstablishedResult::Accept); - } - - #[tokio::test] - async fn manager_limits_outbound_connections() { - let _ = tracing_subscriber::fmt() - .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) - .try_init(); - - let mut manager = TransportManagerBuilder::new() - .with_connection_limits_config( - ConnectionLimitsConfig::default() - .max_incoming_connections(Some(3)) - .max_outgoing_connections(Some(2)), - ) - .build(); - // The connection limit is agnostic of the underlying transports. - manager.register_transport(SupportedTransport::Tcp, Box::new(DummyTransport::new())); - - let peer = PeerId::random(); - let second_peer = PeerId::random(); - let third_peer = PeerId::random(); - - // Setup addresses. - let (first_addr, first_connection_id) = setup_dial_addr(peer, 0); - let (second_addr, second_connection_id) = setup_dial_addr(second_peer, 1); - let (third_addr, third_connection_id) = setup_dial_addr(third_peer, 2); - - // First dial. - manager.dial_address(first_addr.clone()).await.unwrap(); - - // Second dial. - manager.dial_address(second_addr.clone()).await.unwrap(); - - // Third dial, we have a limit on 2 outbound connections. - manager.dial_address(third_addr.clone()).await.unwrap(); - - let result = manager - .on_connection_established( - peer, - &Endpoint::dialer(first_addr.clone(), first_connection_id), - ) - .unwrap(); - - assert_eq!(result, ConnectionEstablishedResult::Accept); - - let result = manager - .on_connection_established( - second_peer, - &Endpoint::dialer(second_addr.clone(), second_connection_id), - ) - .unwrap(); - assert_eq!(result, ConnectionEstablishedResult::Accept); - - // We have reached the limit now. - let result = manager - .on_connection_established( - third_peer, - &Endpoint::dialer(third_addr.clone(), third_connection_id), - ) - .unwrap(); - assert_eq!(result, ConnectionEstablishedResult::Reject); - - // While we have 2 outbound connections active, any dials will fail immediately. - // We cannot perform this check for the non negotiated inbound connections yet, - // since the transport will eagerly accept and negotiate them. This requires - // a refactor into the transport manager, to not waste resources on - // negotiating connections that will be rejected. - let result = manager.dial(peer).await.unwrap_err(); - assert!(std::matches!( - result, - Error::ConnectionLimit(limits::ConnectionLimitsError::MaxOutgoingConnectionsExceeded) - )); - let result = manager.dial_address(first_addr.clone()).await.unwrap_err(); - assert!(std::matches!( - result, - Error::ConnectionLimit(limits::ConnectionLimitsError::MaxOutgoingConnectionsExceeded) - )); - - // Close one connection. - assert!(manager.on_connection_closed(peer, first_connection_id).is_some()); - // We can now dial again. - manager.dial_address(first_addr.clone()).await.unwrap(); - - let result = manager - .on_connection_established(peer, &Endpoint::dialer(first_addr, first_connection_id)) - .unwrap(); - assert_eq!(result, ConnectionEstablishedResult::Accept); - } - - #[tokio::test] - async fn reject_unknown_secondary_connections_with_different_connection_ids() { - let _ = tracing_subscriber::fmt() - .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) - .try_init(); - - let mut manager = TransportManagerBuilder::new().build(); - manager.register_transport(SupportedTransport::Tcp, Box::new(DummyTransport::new())); - - // Random peer ID. - let peer = PeerId::random(); - let (first_addr, _first_connection_id) = setup_dial_addr(peer, 0); - let second_connection_id = ConnectionId::from(1); - let different_connection_id = ConnectionId::from(2); - - // Setup a connected peer with a dial record active. - { - let mut peers = manager.peers.write(); - - let state = PeerState::Connected { - record: ConnectionRecord::new(peer, first_addr.clone(), ConnectionId::from(0)), - secondary: Some(SecondaryOrDialing::Dialing(ConnectionRecord::new( - peer, - first_addr.clone(), - second_connection_id, - ))), - }; - - let peer_context = PeerContext { - state, - addresses: AddressStore::from_iter(vec![first_addr.clone()].into_iter()), - }; - - peers.insert(peer, peer_context); - } - - // Establish a connection, however the connection ID is different. - let result = manager - .on_connection_established( - peer, - &Endpoint::dialer(first_addr.clone(), different_connection_id), - ) - .unwrap(); - assert_eq!(result, ConnectionEstablishedResult::Reject); - } - - #[tokio::test] - async fn guard_against_secondary_connections_with_different_connection_ids() { - // This is the repro case for https://github.com/paritytech/litep2p/issues/172. - let _ = tracing_subscriber::fmt() - .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) - .try_init(); - - let mut manager = TransportManagerBuilder::new().build(); - manager.register_transport(SupportedTransport::Tcp, Box::new(DummyTransport::new())); - - // Random peer ID. - let peer = PeerId::random(); - - let setup_dial_addr = |connection_id: u16| { - let dial_address = Multiaddr::empty() - .with(Protocol::Ip4(Ipv4Addr::new(127, 0, 0, 1))) - .with(Protocol::Tcp(8888 + connection_id)) - .with(Protocol::P2p( - Multihash::from_bytes(&peer.to_bytes()).unwrap(), - )); - let connection_id = ConnectionId::from(connection_id as usize); - - (dial_address, connection_id) - }; - - // Setup addresses. - let (first_addr, first_connection_id) = setup_dial_addr(0); - let (second_addr, _second_connection_id) = setup_dial_addr(1); - let (remote_addr, remote_connection_id) = setup_dial_addr(2); - - // Step 1. Dialing state to peer. - manager.dial_address(first_addr.clone()).await.unwrap(); - { - let peers = manager.peers.read(); - let peer_context = peers.get(&peer).unwrap(); - match &peer_context.state { - PeerState::Dialing { dial_record } => { - assert_eq!(dial_record.address, first_addr); - } - state => panic!("invalid state: {state:?}"), - } - } - - // Step 2. Connection established by the remote peer. - let result = manager - .on_connection_established( - peer, - &Endpoint::listener(remote_addr.clone(), remote_connection_id), - ) - .unwrap(); - assert_eq!(result, ConnectionEstablishedResult::Accept); - { - let peers = manager.peers.read(); - let peer_context = peers.get(&peer).unwrap(); - match &peer_context.state { - PeerState::Connected { - record, - secondary: Some(SecondaryOrDialing::Dialing(dial_record)), - } => { - assert_eq!(record.address, remote_addr); - assert_eq!(record.connection_id, remote_connection_id); - - assert_eq!(dial_record.address, first_addr); - assert_eq!(dial_record.connection_id, first_connection_id) - } - state => panic!("invalid state: {state:?}"), - } - } - - // Step 3. The peer disconnects while we have a dialing in flight. - let event = manager.on_connection_closed(peer, remote_connection_id).unwrap(); - match event { - TransportEvent::ConnectionClosed { - peer: event_peer, - connection_id: event_connection_id, - } => { - assert_eq!(peer, event_peer); - assert_eq!(event_connection_id, remote_connection_id); - } - event => panic!("invalid event: {event:?}"), - } - { - let peers = manager.peers.read(); - let peer_context = peers.get(&peer).unwrap(); - match &peer_context.state { - PeerState::Disconnected { dial_record } => { - let dial_record = dial_record.as_ref().unwrap(); - assert_eq!(dial_record.address, first_addr); - assert_eq!(dial_record.connection_id, first_connection_id); - } - state => panic!("invalid state: {state:?}"), - } - } - - // Step 4. Dial by the second address and expect to not overwrite the state. - manager.dial_address(second_addr.clone()).await.unwrap(); - // The state remains unchanged since we already have a dialing in flight. - { - let peers = manager.peers.read(); - let peer_context = peers.get(&peer).unwrap(); - match &peer_context.state { - PeerState::Disconnected { dial_record } => { - let dial_record = dial_record.as_ref().unwrap(); - assert_eq!(dial_record.address, first_addr); - assert_eq!(dial_record.connection_id, first_connection_id); - } - state => panic!("invalid state: {state:?}"), - } - } - - // Step 5. Remote peer reconnects again. - let result = manager - .on_connection_established( - peer, - &Endpoint::listener(remote_addr.clone(), remote_connection_id), - ) - .unwrap(); - assert_eq!(result, ConnectionEstablishedResult::Accept); - { - let peers = manager.peers.read(); - let peer_context = peers.get(&peer).unwrap(); - match &peer_context.state { - PeerState::Connected { - record, - secondary: Some(SecondaryOrDialing::Dialing(dial_record)), - } => { - assert_eq!(record.address, remote_addr); - assert_eq!(record.connection_id, remote_connection_id); - - // We have not overwritten the first dial record in step 4. - assert_eq!(dial_record.address, first_addr); - assert_eq!(dial_record.connection_id, first_connection_id); - } - state => panic!("invalid state: {state:?}"), - } - } - - // Step 6. First dial responds. - let result = manager - .on_connection_established( - peer, - &Endpoint::dialer(first_addr.clone(), first_connection_id), - ) - .unwrap(); - assert_eq!(result, ConnectionEstablishedResult::Accept); - } - - #[tokio::test] - async fn persist_dial_addresses() { - let _ = tracing_subscriber::fmt() - .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) - .try_init(); - - let mut manager = TransportManagerBuilder::new().build(); - let peer = PeerId::random(); - let dial_address = Multiaddr::empty() - .with(Protocol::Ip4(Ipv4Addr::new(127, 0, 0, 1))) - .with(Protocol::Tcp(8888)) - .with(Protocol::P2p( - Multihash::from_bytes(&peer.to_bytes()).unwrap(), - )); - - let connection_id = ConnectionId::from(0); - let transport = Box::new({ - let mut transport = DummyTransport::new(); - transport.inject_event(TransportEvent::ConnectionEstablished { - peer, - endpoint: Endpoint::listener(dial_address.clone(), connection_id), - }); - transport - }); - manager.register_transport(SupportedTransport::Tcp, transport); - - // First dial attempt. - manager.dial_address(dial_address.clone()).await.unwrap(); - // check the state of the peer. - { - let peers = manager.peers.read(); - let peer_context = peers.get(&peer).unwrap(); - match &peer_context.state { - PeerState::Dialing { dial_record } => { - assert_eq!(dial_record.address, dial_address); - } - state => panic!("invalid state: {state:?}"), - } - - // The address is saved for future dials. - assert_eq!( - peer_context.addresses.addresses.get(&dial_address).unwrap().score(), - 0 - ); - } - - let second_address = Multiaddr::empty() - .with(Protocol::Ip4(Ipv4Addr::new(127, 0, 0, 1))) - .with(Protocol::Tcp(8889)) - .with(Protocol::P2p( - Multihash::from_bytes(&peer.to_bytes()).unwrap(), - )); - - // Second dial attempt with different address. - manager.dial_address(second_address.clone()).await.unwrap(); - // check the state of the peer. - { - let peers = manager.peers.read(); - let peer_context = peers.get(&peer).unwrap(); - match &peer_context.state { - // Must still be dialing the first address. - PeerState::Dialing { dial_record } => { - assert_eq!(dial_record.address, dial_address); - } - state => panic!("invalid state: {state:?}"), - } - - // The address is still saved, even if a second dial is not initiated. - assert_eq!( - peer_context.addresses.addresses.get(&dial_address).unwrap().score(), - 0 - ); - assert_eq!( - peer_context.addresses.addresses.get(&second_address).unwrap().score(), - 0 - ); - } - } - - #[cfg(feature = "websocket")] - #[tokio::test] - async fn opening_errors_are_reported() { - let _ = tracing_subscriber::fmt() - .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) - .try_init(); - - let mut manager = TransportManagerBuilder::new().build(); - let peer = PeerId::random(); - let connection_id = ConnectionId::from(0); - - // Setup TCP transport. - let dial_address_tcp = Multiaddr::empty() - .with(Protocol::Ip4(Ipv4Addr::new(127, 0, 0, 1))) - .with(Protocol::Tcp(8888)) - .with(Protocol::P2p( - Multihash::from_bytes(&peer.to_bytes()).unwrap(), - )); - let transport = Box::new({ - let mut transport = DummyTransport::new(); - transport.inject_event(TransportEvent::OpenFailure { - connection_id, - errors: vec![(dial_address_tcp.clone(), DialError::Timeout)], - }); - transport - }); - manager.register_transport(SupportedTransport::Tcp, transport); - manager.add_known_address( - peer, - vec![Multiaddr::empty() - .with(Protocol::Ip4(Ipv4Addr::new(192, 168, 1, 5))) - .with(Protocol::Tcp(8888)) - .with(Protocol::P2p(Multihash::from(peer)))] - .into_iter(), - ); - - // Setup WebSockets transport. - let dial_address_ws = Multiaddr::empty() - .with(Protocol::Ip4(Ipv4Addr::new(127, 0, 0, 1))) - .with(Protocol::Tcp(8889)) - .with(Protocol::Ws(Cow::Borrowed("/"))) - .with(Protocol::P2p( - Multihash::from_bytes(&peer.to_bytes()).unwrap(), - )); - - let transport = Box::new({ - let mut transport = DummyTransport::new(); - transport.inject_event(TransportEvent::OpenFailure { - connection_id, - errors: vec![(dial_address_ws.clone(), DialError::Timeout)], - }); - transport - }); - manager.register_transport(SupportedTransport::WebSocket, transport); - manager.add_known_address( - peer, - vec![Multiaddr::empty() - .with(Protocol::Ip4(Ipv4Addr::new(192, 168, 1, 5))) - .with(Protocol::Tcp(8889)) - .with(Protocol::Ws(Cow::Borrowed("/"))) - .with(Protocol::P2p( - Multihash::from_bytes(&peer.to_bytes()).unwrap(), - ))] - .into_iter(), - ); - - // Dial the peer on both transports. - assert!(manager.dial(peer).await.is_ok()); - assert!(!manager.pending_connections.is_empty()); - - { - let peers = manager.peers.read(); - - match peers.get(&peer) { - Some(PeerContext { - state: PeerState::Opening { .. }, - .. - }) => {} - state => panic!("invalid state for peer: {state:?}"), - } - } - - match manager.next().await.unwrap() { - TransportEvent::OpenFailure { - connection_id, - errors, - } => { - assert_eq!(connection_id, ConnectionId::from(0)); - assert_eq!(errors.len(), 2); - let tcp = errors.iter().find(|(addr, _)| addr == &dial_address_tcp).unwrap(); - assert!(std::matches!(tcp.1, DialError::Timeout)); - - let ws = errors.iter().find(|(addr, _)| addr == &dial_address_ws).unwrap(); - assert!(std::matches!(ws.1, DialError::Timeout)); - } - event => panic!("invalid event: {event:?}"), - } - assert!(manager.pending_connections.is_empty()); - assert!(manager.opening_errors.is_empty()); - } + use crate::transport::manager::{address::AddressStore, peer_state::SecondaryOrDialing}; + use limits::ConnectionLimitsConfig; + + use multihash::Multihash; + + use super::*; + use crate::{ + crypto::dilithium::Keypair, + executor::DefaultExecutor, + transport::{dummy::DummyTransport, KEEP_ALIVE_TIMEOUT}, + }; + #[cfg(feature = "websocket")] + use std::borrow::Cow; + use std::{ + net::{Ipv4Addr, Ipv6Addr}, + sync::Arc, + usize, + }; + + /// Setup TCP address and connection id. + fn setup_dial_addr(peer: PeerId, connection_id: u16) -> (Multiaddr, ConnectionId) { + let dial_address = Multiaddr::empty() + .with(Protocol::Ip4(Ipv4Addr::new(127, 0, 0, 1))) + .with(Protocol::Tcp(8888 + connection_id)) + .with(Protocol::P2p(Multihash::from_bytes(&peer.to_bytes()).unwrap())); + let connection_id = ConnectionId::from(connection_id as usize); + + (dial_address, connection_id) + } + + #[tokio::test] + #[cfg(feature = "websocket")] + #[cfg(feature = "quic")] + async fn transport_events() { + struct MockTransport { + rx: tokio::sync::mpsc::Receiver, + } + + impl MockTransport { + fn new(rx: tokio::sync::mpsc::Receiver) -> Self { + Self { rx } + } + } + + impl Transport for MockTransport { + fn dial( + &mut self, + _connection_id: ConnectionId, + _address: Multiaddr, + ) -> crate::Result<()> { + Ok(()) + } + + fn accept( + &mut self, + _connection_id: ConnectionId, + ) -> crate::Result>> { + Ok(Box::pin(async { Ok(()) })) + } + + fn accept_pending(&mut self, _connection_id: ConnectionId) -> crate::Result<()> { + Ok(()) + } + + fn reject_pending(&mut self, _connection_id: ConnectionId) -> crate::Result<()> { + Ok(()) + } + + fn reject(&mut self, _connection_id: ConnectionId) -> crate::Result<()> { + Ok(()) + } + + fn open( + &mut self, + _connection_id: ConnectionId, + _addresses: Vec, + ) -> crate::Result<()> { + Ok(()) + } + + fn negotiate(&mut self, _connection_id: ConnectionId) -> crate::Result<()> { + Ok(()) + } + + fn cancel(&mut self, _connection_id: ConnectionId) {} + } + + impl Stream for MockTransport { + type Item = TransportEvent; + fn poll_next( + mut self: Pin<&mut Self>, + cx: &mut Context<'_>, + ) -> Poll> { + self.rx.poll_recv(cx) + } + } + + let mut transports = TransportContext::new(); + + let (tx_tcp, rx) = tokio::sync::mpsc::channel(8); + let transport = MockTransport::new(rx); + transports.register_transport(SupportedTransport::Tcp, Box::new(transport)); + + let (tx_ws, rx) = tokio::sync::mpsc::channel(8); + let transport = MockTransport::new(rx); + transports.register_transport(SupportedTransport::WebSocket, Box::new(transport)); + + let (tx_quic, rx) = tokio::sync::mpsc::channel(8); + let transport = MockTransport::new(rx); + transports.register_transport(SupportedTransport::Quic, Box::new(transport)); + + assert_eq!(transports.index, 0); + assert_eq!(transports.transports.len(), 3); + // No items. + futures::future::poll_fn(|cx| match transports.poll_next_unpin(cx) { + std::task::Poll::Ready(_) => panic!("didn't expect event from `TransportService`"), + std::task::Poll::Pending => std::task::Poll::Ready(()), + }) + .await; + assert_eq!(transports.index, 0); + + // Websocket events. + tx_ws + .send(TransportEvent::PendingInboundConnection { connection_id: ConnectionId::from(1) }) + .await + .expect("channel to be open"); + + let event = futures::future::poll_fn(|cx| transports.poll_next_unpin(cx)) + .await + .expect("expected event"); + assert_eq!(event.0, SupportedTransport::WebSocket); + assert!(std::matches!(event.1, TransportEvent::PendingInboundConnection { .. })); + assert_eq!(transports.index, 2); + + // TCP events. + tx_tcp + .send(TransportEvent::PendingInboundConnection { connection_id: ConnectionId::from(2) }) + .await + .expect("channel to be open"); + + let event = futures::future::poll_fn(|cx| transports.poll_next_unpin(cx)) + .await + .expect("expected event"); + assert_eq!(event.0, SupportedTransport::Tcp); + assert!(std::matches!(event.1, TransportEvent::PendingInboundConnection { .. })); + assert_eq!(transports.index, 1); + + // QUIC events + tx_quic + .send(TransportEvent::PendingInboundConnection { connection_id: ConnectionId::from(3) }) + .await + .expect("channel to be open"); + + let event = futures::future::poll_fn(|cx| transports.poll_next_unpin(cx)) + .await + .expect("expected event"); + assert_eq!(event.0, SupportedTransport::Quic); + assert!(std::matches!(event.1, TransportEvent::PendingInboundConnection { .. })); + assert_eq!(transports.index, 0); + + // All three transports produce events. + tx_ws + .send(TransportEvent::PendingInboundConnection { connection_id: ConnectionId::from(4) }) + .await + .expect("channel to be open"); + tx_tcp + .send(TransportEvent::PendingInboundConnection { connection_id: ConnectionId::from(5) }) + .await + .expect("channel to be open"); + tx_quic + .send(TransportEvent::PendingInboundConnection { connection_id: ConnectionId::from(6) }) + .await + .expect("channel to be open"); + + let event = futures::future::poll_fn(|cx| transports.poll_next_unpin(cx)) + .await + .expect("expected event"); + assert_eq!(event.0, SupportedTransport::Tcp); + assert!(std::matches!(event.1, TransportEvent::PendingInboundConnection { .. })); + assert_eq!(transports.index, 1); + + let event = futures::future::poll_fn(|cx| transports.poll_next_unpin(cx)) + .await + .expect("expected event"); + assert_eq!(event.0, SupportedTransport::WebSocket); + assert!(std::matches!(event.1, TransportEvent::PendingInboundConnection { .. })); + assert_eq!(transports.index, 2); + + let event = futures::future::poll_fn(|cx| transports.poll_next_unpin(cx)) + .await + .expect("expected event"); + assert_eq!(event.0, SupportedTransport::Quic); + assert!(std::matches!(event.1, TransportEvent::PendingInboundConnection { .. })); + assert_eq!(transports.index, 0); + } + + #[test] + #[should_panic] + #[cfg(debug_assertions)] + fn duplicate_protocol() { + let mut manager = TransportManagerBuilder::new().build(); + + manager.register_protocol( + ProtocolName::from("/notif/1"), + Vec::new(), + ProtocolCodec::UnsignedVarint(None), + KEEP_ALIVE_TIMEOUT, + SubstreamKeepAlive::Yes, + ); + manager.register_protocol( + ProtocolName::from("/notif/1"), + Vec::new(), + ProtocolCodec::UnsignedVarint(None), + KEEP_ALIVE_TIMEOUT, + SubstreamKeepAlive::Yes, + ); + } + + #[test] + #[should_panic] + #[cfg(debug_assertions)] + fn fallback_protocol_as_duplicate_main_protocol() { + let mut manager = TransportManagerBuilder::new().build(); + + manager.register_protocol( + ProtocolName::from("/notif/1"), + Vec::new(), + ProtocolCodec::UnsignedVarint(None), + KEEP_ALIVE_TIMEOUT, + SubstreamKeepAlive::Yes, + ); + manager.register_protocol( + ProtocolName::from("/notif/2"), + vec![ProtocolName::from("/notif/2/new"), ProtocolName::from("/notif/1")], + ProtocolCodec::UnsignedVarint(None), + KEEP_ALIVE_TIMEOUT, + SubstreamKeepAlive::Yes, + ); + } + + #[test] + #[should_panic] + #[cfg(debug_assertions)] + fn duplicate_fallback_protocol() { + let mut manager = TransportManagerBuilder::new().build(); + + manager.register_protocol( + ProtocolName::from("/notif/1"), + vec![ProtocolName::from("/notif/1/new"), ProtocolName::from("/notif/1")], + ProtocolCodec::UnsignedVarint(None), + KEEP_ALIVE_TIMEOUT, + SubstreamKeepAlive::Yes, + ); + manager.register_protocol( + ProtocolName::from("/notif/2"), + vec![ProtocolName::from("/notif/2/new"), ProtocolName::from("/notif/1/new")], + ProtocolCodec::UnsignedVarint(None), + KEEP_ALIVE_TIMEOUT, + SubstreamKeepAlive::Yes, + ); + } + + #[test] + #[should_panic] + #[cfg(debug_assertions)] + fn duplicate_transport() { + let mut manager = TransportManagerBuilder::new().build(); + + manager.register_transport(SupportedTransport::Tcp, Box::new(DummyTransport::new())); + manager.register_transport(SupportedTransport::Tcp, Box::new(DummyTransport::new())); + } + + #[tokio::test] + async fn tried_to_self_using_peer_id() { + let keypair = Keypair::generate(); + let local_peer_id = PeerId::from_public_key(&keypair.public().into()); + let mut manager = TransportManagerBuilder::new().with_keypair(keypair).build(); + + assert!(manager.dial(local_peer_id).await.is_err()); + } + + #[tokio::test] + async fn try_to_dial_over_disabled_transport() { + let mut manager = TransportManagerBuilder::new().build(); + let _handle = manager.transport_handle(Arc::new(DefaultExecutor {})); + manager.register_transport(SupportedTransport::Tcp, Box::new(DummyTransport::new())); + + let address = Multiaddr::empty() + .with(Protocol::Ip4(Ipv4Addr::new(127, 0, 0, 1))) + .with(Protocol::Udp(8888)) + .with(Protocol::QuicV1) + .with(Protocol::P2p(Multihash::from_bytes(&PeerId::random().to_bytes()).unwrap())); + + assert!(std::matches!( + manager.dial_address(address).await, + Err(Error::TransportNotSupported(_)) + )); + } + + #[tokio::test] + async fn successful_dial_reported_to_transport_manager() { + let _ = tracing_subscriber::fmt() + .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) + .try_init(); + + let mut manager = TransportManagerBuilder::new().build(); + let peer = PeerId::random(); + let dial_address = Multiaddr::empty() + .with(Protocol::Ip4(Ipv4Addr::new(127, 0, 0, 1))) + .with(Protocol::Tcp(8888)) + .with(Protocol::P2p(Multihash::from_bytes(&peer.to_bytes()).unwrap())); + + let transport = Box::new({ + let mut transport = DummyTransport::new(); + transport.inject_event(TransportEvent::ConnectionEstablished { + peer, + endpoint: Endpoint::dialer(dial_address.clone(), ConnectionId::from(0usize)), + }); + transport + }); + manager.register_transport(SupportedTransport::Tcp, transport); + + assert!(manager.dial_address(dial_address.clone()).await.is_ok()); + assert!(!manager.pending_connections.is_empty()); + + { + let peers = manager.peers.read(); + + match peers.get(&peer) { + Some(PeerContext { state: PeerState::Dialing { .. }, .. }) => {}, + state => panic!("invalid state for peer: {state:?}"), + } + } + + match manager.next().await.unwrap() { + TransportEvent::ConnectionEstablished { + peer: event_peer, + endpoint: event_endpoint, + .. + } => { + assert_eq!(peer, event_peer); + assert_eq!( + event_endpoint, + Endpoint::dialer(dial_address.clone(), ConnectionId::from(0usize)) + ) + }, + event => panic!("invalid event: {event:?}"), + } + } + + #[tokio::test] + async fn try_to_dial_same_peer_twice() { + let _ = tracing_subscriber::fmt() + .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) + .try_init(); + + let mut manager = TransportManagerBuilder::new().build(); + let _handle = manager.transport_handle(Arc::new(DefaultExecutor {})); + manager.register_transport(SupportedTransport::Tcp, Box::new(DummyTransport::new())); + + let peer = PeerId::random(); + let dial_address = Multiaddr::empty() + .with(Protocol::Ip4(Ipv4Addr::new(127, 0, 0, 1))) + .with(Protocol::Tcp(8888)) + .with(Protocol::P2p(Multihash::from_bytes(&peer.to_bytes()).unwrap())); + + assert!(manager.dial_address(dial_address.clone()).await.is_ok()); + assert_eq!(manager.pending_connections.len(), 1); + + assert!(manager.dial_address(dial_address.clone()).await.is_ok()); + assert_eq!(manager.pending_connections.len(), 1); + } + + #[tokio::test] + async fn try_to_dial_same_peer_twice_diffrent_address() { + let _ = tracing_subscriber::fmt() + .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) + .try_init(); + + let mut manager = TransportManagerBuilder::new().build(); + let _handle = manager.transport_handle(Arc::new(DefaultExecutor {})); + manager.register_transport(SupportedTransport::Tcp, Box::new(DummyTransport::new())); + + let peer = PeerId::random(); + + assert!(manager + .dial_address( + Multiaddr::empty() + .with(Protocol::Ip4(Ipv4Addr::new(127, 0, 0, 1))) + .with(Protocol::Tcp(8888)) + .with(Protocol::P2p(Multihash::from_bytes(&peer.to_bytes()).unwrap(),)) + ) + .await + .is_ok()); + assert_eq!(manager.pending_connections.len(), 1); + + assert!(manager + .dial_address( + Multiaddr::empty() + .with(Protocol::Ip6(Ipv6Addr::new(0, 0, 0, 0, 0, 0, 0, 1))) + .with(Protocol::Tcp(8888)) + .with(Protocol::P2p(Multihash::from_bytes(&peer.to_bytes()).unwrap(),)) + ) + .await + .is_ok()); + assert_eq!(manager.pending_connections.len(), 1); + } + + #[tokio::test] + async fn dial_non_existent_peer() { + let _ = tracing_subscriber::fmt() + .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) + .try_init(); + + let mut manager = TransportManagerBuilder::new().build(); + let _handle = manager.transport_handle(Arc::new(DefaultExecutor {})); + manager.register_transport(SupportedTransport::Tcp, Box::new(DummyTransport::new())); + + assert!(manager.dial(PeerId::random()).await.is_err()); + } + + #[tokio::test] + async fn dial_non_peer_with_no_known_addresses() { + let _ = tracing_subscriber::fmt() + .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) + .try_init(); + + let mut manager = TransportManagerBuilder::new().build(); + let _handle = manager.transport_handle(Arc::new(DefaultExecutor {})); + manager.register_transport(SupportedTransport::Tcp, Box::new(DummyTransport::new())); + + let peer = PeerId::random(); + manager.peers.write().insert( + peer, + PeerContext { + state: PeerState::Disconnected { dial_record: None }, + addresses: AddressStore::new(), + }, + ); + + assert!(manager.dial(peer).await.is_err()); + } + + #[tokio::test] + async fn check_supported_transport_when_adding_known_address() { + let _ = tracing_subscriber::fmt() + .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) + .try_init(); + + let mut transports = HashSet::new(); + transports.insert(SupportedTransport::Tcp); + #[cfg(feature = "quic")] + transports.insert(SupportedTransport::Quic); + + let manager = TransportManagerBuilder::new().with_supported_transports(transports).build(); + + let handle = manager.transport_manager_handle; + + // ipv6 + let address = Multiaddr::empty() + .with(Protocol::Ip6(Ipv6Addr::new(0, 0, 0, 0, 0, 0, 0, 1))) + .with(Protocol::Tcp(8888)) + .with(Protocol::P2p(Multihash::from_bytes(&PeerId::random().to_bytes()).unwrap())); + assert!(handle.supported_transport(&address)); + + // ipv4 + let address = Multiaddr::empty() + .with(Protocol::Ip4(Ipv4Addr::new(127, 0, 0, 1))) + .with(Protocol::Tcp(8888)) + .with(Protocol::P2p(Multihash::from_bytes(&PeerId::random().to_bytes()).unwrap())); + assert!(handle.supported_transport(&address)); + + // quic + let address = Multiaddr::empty() + .with(Protocol::Ip4(Ipv4Addr::new(127, 0, 0, 1))) + .with(Protocol::Udp(8888)) + .with(Protocol::QuicV1) + .with(Protocol::P2p(Multihash::from_bytes(&PeerId::random().to_bytes()).unwrap())); + #[cfg(feature = "quic")] + assert!(handle.supported_transport(&address)); + #[cfg(not(feature = "quic"))] + assert!(!handle.supported_transport(&address)); + + // websocket + let address = Multiaddr::empty() + .with(Protocol::Ip4(Ipv4Addr::new(127, 0, 0, 1))) + .with(Protocol::Tcp(8888)) + .with(Protocol::Ws(std::borrow::Cow::Owned("/".to_string()))); + assert!(!handle.supported_transport(&address)); + + // websocket secure + let address = Multiaddr::empty() + .with(Protocol::Ip4(Ipv4Addr::new(127, 0, 0, 1))) + .with(Protocol::Tcp(8888)) + .with(Protocol::Wss(std::borrow::Cow::Owned("/".to_string()))); + assert!(!handle.supported_transport(&address)); + } + + // local node tried to dial a node and it failed but in the mean + // time the remote node dialed local node and that succeeded. + #[tokio::test] + async fn on_dial_failure_already_connected() { + let _ = tracing_subscriber::fmt() + .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) + .try_init(); + + let mut manager = TransportManagerBuilder::new().build(); + let _handle = manager.transport_handle(Arc::new(DefaultExecutor {})); + manager.register_transport(SupportedTransport::Tcp, Box::new(DummyTransport::new())); + + let peer = PeerId::random(); + let dial_address = Multiaddr::empty() + .with(Protocol::Ip4(Ipv4Addr::new(127, 0, 0, 1))) + .with(Protocol::Tcp(8888)) + .with(Protocol::P2p(Multihash::from_bytes(&peer.to_bytes()).unwrap())); + let connect_address = Multiaddr::empty() + .with(Protocol::Ip4(Ipv4Addr::new(192, 168, 1, 173))) + .with(Protocol::Tcp(8888)) + .with(Protocol::P2p(Multihash::from_bytes(&peer.to_bytes()).unwrap())); + assert!(manager.dial_address(dial_address.clone()).await.is_ok()); + assert_eq!(manager.pending_connections.len(), 1); + + match &manager.peers.read().get(&peer).unwrap().state { + PeerState::Dialing { dial_record } => { + assert_eq!(dial_record.address, dial_address); + }, + state => panic!("invalid state for peer: {state:?}"), + } + + // remote peer connected to local node from a different address that was dialed + manager + .on_connection_established( + peer, + &Endpoint::dialer(connect_address, ConnectionId::from(1usize)), + ) + .unwrap(); + + // dialing the peer failed + manager.on_dial_failure(ConnectionId::from(0usize)).unwrap(); + + let peers = manager.peers.read(); + let peer = peers.get(&peer).unwrap(); + + match &peer.state { + PeerState::Connected { secondary, .. } => { + assert!(secondary.is_none()); + assert!(peer.addresses.addresses.contains_key(&dial_address)); + }, + state => panic!("invalid state: {state:?}"), + } + } + + // local node tried to dial a node and it failed but in the mean + // time the remote node dialed local node and that succeeded. + // + // while the dial was still in progresss, the remote node disconnected after which + // the dial failure was reported. + #[tokio::test] + async fn on_dial_failure_already_connected_and_disconnected() { + let _ = tracing_subscriber::fmt() + .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) + .try_init(); + + let mut manager = TransportManagerBuilder::new().build(); + let _handle = manager.transport_handle(Arc::new(DefaultExecutor {})); + manager.register_transport(SupportedTransport::Tcp, Box::new(DummyTransport::new())); + + let peer = PeerId::random(); + let dial_address = Multiaddr::empty() + .with(Protocol::Ip4(Ipv4Addr::new(127, 0, 0, 1))) + .with(Protocol::Tcp(8888)) + .with(Protocol::P2p(Multihash::from_bytes(&peer.to_bytes()).unwrap())); + let connect_address = Multiaddr::empty() + .with(Protocol::Ip4(Ipv4Addr::new(192, 168, 1, 173))) + .with(Protocol::Tcp(8888)) + .with(Protocol::P2p(Multihash::from_bytes(&peer.to_bytes()).unwrap())); + assert!(manager.dial_address(dial_address.clone()).await.is_ok()); + assert_eq!(manager.pending_connections.len(), 1); + + match &manager.peers.read().get(&peer).unwrap().state { + PeerState::Dialing { dial_record } => { + assert_eq!(dial_record.address, dial_address); + }, + state => panic!("invalid state for peer: {state:?}"), + } + + // remote peer connected to local node from a different address that was dialed + manager + .on_connection_established( + peer, + &Endpoint::listener(connect_address, ConnectionId::from(1usize)), + ) + .unwrap(); + + // connection to remote was closed while the dial was still in progress + manager.on_connection_closed(peer, ConnectionId::from(1usize)).unwrap(); + + // verify that the peer state is `Disconnected` + { + let peers = manager.peers.read(); + let peer = peers.get(&peer).unwrap(); + + match &peer.state { + PeerState::Disconnected { dial_record: Some(dial_record), .. } => { + assert_eq!(dial_record.address, dial_address); + }, + state => panic!("invalid state: {state:?}"), + } + } + + // dialing the peer failed + manager.on_dial_failure(ConnectionId::from(0usize)).unwrap(); + + let peers = manager.peers.read(); + let peer = peers.get(&peer).unwrap(); + + match &peer.state { + PeerState::Disconnected { dial_record: None, .. } => { + assert!(peer.addresses.addresses.contains_key(&dial_address)); + }, + state => panic!("invalid state: {state:?}"), + } + } + + // local node tried to dial a node and it failed but in the mean + // time the remote node dialed local node and that succeeded. + // + // while the dial was still in progresss, the remote node disconnected after which + // the dial failure was reported. + #[tokio::test] + async fn on_dial_success_while_connected_and_disconnected() { + let _ = tracing_subscriber::fmt() + .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) + .try_init(); + + let mut manager = TransportManagerBuilder::new().build(); + let _handle = manager.transport_handle(Arc::new(DefaultExecutor {})); + manager.register_transport(SupportedTransport::Tcp, Box::new(DummyTransport::new())); + + let peer = PeerId::random(); + let dial_address = Multiaddr::empty() + .with(Protocol::Ip4(Ipv4Addr::new(127, 0, 0, 1))) + .with(Protocol::Tcp(8888)) + .with(Protocol::P2p(Multihash::from_bytes(&peer.to_bytes()).unwrap())); + let connect_address = Multiaddr::empty() + .with(Protocol::Ip4(Ipv4Addr::new(192, 168, 1, 173))) + .with(Protocol::Tcp(8888)) + .with(Protocol::P2p(Multihash::from_bytes(&peer.to_bytes()).unwrap())); + assert!(manager.dial_address(dial_address.clone()).await.is_ok()); + assert_eq!(manager.pending_connections.len(), 1); + + match &manager.peers.read().get(&peer).unwrap().state { + PeerState::Dialing { dial_record } => { + assert_eq!(dial_record.address, dial_address); + }, + state => panic!("invalid state for peer: {state:?}"), + } + + // remote peer connected to local node from a different address that was dialed + manager + .on_connection_established( + peer, + &Endpoint::listener(connect_address, ConnectionId::from(1usize)), + ) + .unwrap(); + + // connection to remote was closed while the dial was still in progress + manager.on_connection_closed(peer, ConnectionId::from(1usize)).unwrap(); + + // verify that the peer state is `Disconnected` + { + let peers = manager.peers.read(); + let peer = peers.get(&peer).unwrap(); + + match &peer.state { + PeerState::Disconnected { dial_record: Some(dial_record), .. } => { + assert_eq!(dial_record.address, dial_address); + }, + state => panic!("invalid state: {state:?}"), + } + } + + // the original dial succeeded + manager + .on_connection_established( + peer, + &Endpoint::dialer(dial_address, ConnectionId::from(0usize)), + ) + .unwrap(); + + let peers = manager.peers.read(); + let peer = peers.get(&peer).unwrap(); + + match &peer.state { + PeerState::Connected { secondary: None, .. } => {}, + state => panic!("invalid state: {state:?}"), + } + } + + #[tokio::test] + async fn secondary_connection_is_tracked() { + let _ = tracing_subscriber::fmt() + .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) + .try_init(); + + let mut manager = TransportManagerBuilder::new().build(); + manager.register_transport(SupportedTransport::Tcp, Box::new(DummyTransport::new())); + + let peer = PeerId::random(); + let address1 = Multiaddr::empty() + .with(Protocol::Ip4(Ipv4Addr::new(127, 0, 0, 1))) + .with(Protocol::Tcp(8888)) + .with(Protocol::P2p(Multihash::from_bytes(&peer.to_bytes()).unwrap())); + let address2 = Multiaddr::empty() + .with(Protocol::Ip4(Ipv4Addr::new(192, 168, 1, 173))) + .with(Protocol::Tcp(8888)) + .with(Protocol::P2p(Multihash::from_bytes(&peer.to_bytes()).unwrap())); + let address3 = Multiaddr::empty() + .with(Protocol::Ip4(Ipv4Addr::new(192, 168, 10, 64))) + .with(Protocol::Tcp(9999)) + .with(Protocol::P2p(Multihash::from_bytes(&peer.to_bytes()).unwrap())); + + // remote peer connected to local node + let established_result = manager + .on_connection_established( + peer, + &Endpoint::dialer(address1.clone(), ConnectionId::from(0usize)), + ) + .unwrap(); + assert_eq!(established_result, ConnectionEstablishedResult::Accept); + + // verify that the peer state is `Connected` with no secondary connection + { + let peers = manager.peers.read(); + let peer = peers.get(&peer).unwrap(); + + match &peer.state { + PeerState::Connected { secondary: None, .. } => {}, + state => panic!("invalid state: {state:?}"), + } + } + + // second connection is established, verify that the secondary connection is tracked + let established_result = manager + .on_connection_established( + peer, + &Endpoint::listener(address2.clone(), ConnectionId::from(1usize)), + ) + .unwrap(); + assert_eq!(established_result, ConnectionEstablishedResult::Accept); + + let peers = manager.peers.read(); + let context = peers.get(&peer).unwrap(); + + match &context.state { + PeerState::Connected { + secondary: Some(SecondaryOrDialing::Secondary(secondary_connection)), + .. + } => { + assert_eq!(secondary_connection.address, address2); + }, + state => panic!("invalid state: {state:?}"), + } + drop(peers); + + // tertiary connection is ignored + let established_result = manager + .on_connection_established( + peer, + &Endpoint::listener(address3.clone(), ConnectionId::from(2usize)), + ) + .unwrap(); + assert_eq!(established_result, ConnectionEstablishedResult::Reject); + + let peers = manager.peers.read(); + let peer = peers.get(&peer).unwrap(); + + match &peer.state { + PeerState::Connected { + secondary: Some(SecondaryOrDialing::Secondary(secondary_connection)), + .. + } => { + assert_eq!(secondary_connection.address, address2); + // Endpoint::listener addresses are not tracked. + assert!(!peer.addresses.addresses.contains_key(&address2)); + assert!(!peer.addresses.addresses.contains_key(&address3)); + assert_eq!( + peer.addresses.addresses.get(&address1).unwrap().score(), + scores::CONNECTION_ESTABLISHED + ); + }, + state => panic!("invalid state: {state:?}"), + } + } + #[tokio::test] + async fn secondary_connection_with_different_dial_endpoint_is_rejected() { + let _ = tracing_subscriber::fmt() + .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) + .try_init(); + + let mut manager = TransportManagerBuilder::new().build(); + manager.register_transport(SupportedTransport::Tcp, Box::new(DummyTransport::new())); + + let peer = PeerId::random(); + let address1 = Multiaddr::empty() + .with(Protocol::Ip4(Ipv4Addr::new(127, 0, 0, 1))) + .with(Protocol::Tcp(8888)) + .with(Protocol::P2p(Multihash::from_bytes(&peer.to_bytes()).unwrap())); + let address2 = Multiaddr::empty() + .with(Protocol::Ip4(Ipv4Addr::new(192, 168, 1, 173))) + .with(Protocol::Tcp(8888)) + .with(Protocol::P2p(Multihash::from_bytes(&peer.to_bytes()).unwrap())); + + // remote peer connected to local node + let established_result = manager + .on_connection_established( + peer, + &Endpoint::listener(address1, ConnectionId::from(0usize)), + ) + .unwrap(); + assert_eq!(established_result, ConnectionEstablishedResult::Accept); + + // verify that the peer state is `Connected` with no secondary connection + { + let peers = manager.peers.read(); + let peer = peers.get(&peer).unwrap(); + + match &peer.state { + PeerState::Connected { secondary: None, .. } => {}, + state => panic!("invalid state: {state:?}"), + } + } + + // Add a dial record for the peer. + { + let mut peers = manager.peers.write(); + let peer_context = peers.get_mut(&peer).unwrap(); + + let record = match &peer_context.state { + PeerState::Connected { record, .. } => record.clone(), + state => panic!("invalid state: {state:?}"), + }; + + let dial_record = ConnectionRecord::new(peer, address2.clone(), ConnectionId::from(0)); + peer_context.state = PeerState::Connected { + record, + secondary: Some(SecondaryOrDialing::Dialing(dial_record)), + }; + } + + // second connection is from a different endpoint should fail. + let established_result = manager + .on_connection_established( + peer, + &Endpoint::listener(address2.clone(), ConnectionId::from(1usize)), + ) + .unwrap(); + assert_eq!(established_result, ConnectionEstablishedResult::Reject); + + // Multiple secondary connections should also fail. + let established_result = manager + .on_connection_established( + peer, + &Endpoint::listener(address2.clone(), ConnectionId::from(1usize)), + ) + .unwrap(); + assert_eq!(established_result, ConnectionEstablishedResult::Reject); + + // Accept the proper connection ID. + let established_result = manager + .on_connection_established( + peer, + &Endpoint::listener(address2.clone(), ConnectionId::from(0usize)), + ) + .unwrap(); + assert_eq!(established_result, ConnectionEstablishedResult::Accept); + } + + #[tokio::test] + async fn secondary_connection_closed() { + let _ = tracing_subscriber::fmt() + .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) + .try_init(); + + let mut manager = TransportManagerBuilder::new().build(); + manager.register_transport(SupportedTransport::Tcp, Box::new(DummyTransport::new())); + + let peer = PeerId::random(); + let address1 = Multiaddr::empty() + .with(Protocol::Ip4(Ipv4Addr::new(127, 0, 0, 1))) + .with(Protocol::Tcp(8888)) + .with(Protocol::P2p(Multihash::from_bytes(&peer.to_bytes()).unwrap())); + let address2 = Multiaddr::empty() + .with(Protocol::Ip4(Ipv4Addr::new(192, 168, 1, 173))) + .with(Protocol::Tcp(8888)) + .with(Protocol::P2p(Multihash::from_bytes(&peer.to_bytes()).unwrap())); + + // remote peer connected to local node + let emit_event = manager + .on_connection_established( + peer, + &Endpoint::listener(address1, ConnectionId::from(0usize)), + ) + .unwrap(); + assert!(std::matches!(emit_event, ConnectionEstablishedResult::Accept)); + + // verify that the peer state is `Connected` with no seconary connection + { + let peers = manager.peers.read(); + let peer = peers.get(&peer).unwrap(); + + match &peer.state { + PeerState::Connected { record, secondary: None, .. } => { + // Primary connection is established. + assert_eq!(record.connection_id, ConnectionId::from(0usize)); + }, + state => panic!("invalid state: {state:?}"), + } + } + + // second connection is established, verify that the secondary connection is tracked + let emit_event = manager + .on_connection_established( + peer, + &Endpoint::dialer(address2.clone(), ConnectionId::from(1usize)), + ) + .unwrap(); + assert!(std::matches!(emit_event, ConnectionEstablishedResult::Accept)); + + let peers = manager.peers.read(); + let context = peers.get(&peer).unwrap(); + + match &context.state { + PeerState::Connected { + secondary: Some(SecondaryOrDialing::Secondary(secondary_connection)), + .. + } => { + assert_eq!(secondary_connection.address, address2); + }, + state => panic!("invalid state: {state:?}"), + } + drop(peers); + + // close the secondary connection and verify that the peer remains connected + let emit_event = manager.on_connection_closed(peer, ConnectionId::from(1usize)); + assert!(emit_event.is_none()); + + let peers = manager.peers.read(); + let context = peers.get(&peer).unwrap(); + + match &context.state { + PeerState::Connected { secondary: None, record } => { + assert!(context.addresses.addresses.contains_key(&address2)); + assert_eq!( + context.addresses.addresses.get(&address2).unwrap().score(), + scores::CONNECTION_ESTABLISHED + ); + // Primary remains opened. + assert_eq!(record.connection_id, ConnectionId::from(0usize)); + }, + state => panic!("invalid state: {state:?}"), + } + } + + #[tokio::test] + async fn switch_to_secondary_connection() { + let _ = tracing_subscriber::fmt() + .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) + .try_init(); + + let mut manager = TransportManagerBuilder::new().build(); + manager.register_transport(SupportedTransport::Tcp, Box::new(DummyTransport::new())); + + let peer = PeerId::random(); + let address1 = Multiaddr::empty() + .with(Protocol::Ip4(Ipv4Addr::new(127, 0, 0, 1))) + .with(Protocol::Tcp(8888)) + .with(Protocol::P2p(Multihash::from_bytes(&peer.to_bytes()).unwrap())); + let address2 = Multiaddr::empty() + .with(Protocol::Ip4(Ipv4Addr::new(192, 168, 1, 173))) + .with(Protocol::Tcp(8888)) + .with(Protocol::P2p(Multihash::from_bytes(&peer.to_bytes()).unwrap())); + + // remote peer connected to local node + let emit_event = manager + .on_connection_established( + peer, + &Endpoint::listener(address1.clone(), ConnectionId::from(0usize)), + ) + .unwrap(); + assert!(std::matches!(emit_event, ConnectionEstablishedResult::Accept)); + + // verify that the peer state is `Connected` with no secondary connection + { + let peers = manager.peers.read(); + let peer = peers.get(&peer).unwrap(); + + match &peer.state { + PeerState::Connected { secondary: None, .. } => {}, + state => panic!("invalid state: {state:?}"), + } + } + + // second connection is established, verify that the secondary connection is tracked + let emit_event = manager + .on_connection_established( + peer, + &Endpoint::dialer(address2.clone(), ConnectionId::from(1usize)), + ) + .unwrap(); + assert!(std::matches!(emit_event, ConnectionEstablishedResult::Accept)); + + let peers = manager.peers.read(); + let context = peers.get(&peer).unwrap(); + + match &context.state { + PeerState::Connected { + secondary: Some(SecondaryOrDialing::Secondary(secondary_connection)), + .. + } => { + assert_eq!(secondary_connection.address, address2); + }, + state => panic!("invalid state: {state:?}"), + } + drop(peers); + + // close the primary connection and verify that the peer remains connected + // while the primary connection address is stored in peer addresses + let emit_event = manager.on_connection_closed(peer, ConnectionId::from(0usize)); + assert!(emit_event.is_none()); + + let peers = manager.peers.read(); + let context = peers.get(&peer).unwrap(); + + match &context.state { + PeerState::Connected { secondary: None, record } => { + assert!(!context.addresses.addresses.contains_key(&address1)); + assert!(context.addresses.addresses.contains_key(&address2)); + assert_eq!(record.connection_id, ConnectionId::from(1usize)); + }, + state => panic!("invalid state: {state:?}"), + } + } + + // two connections already exist and a third was opened which is ignored by + // `on_connection_established()`, when that connection is closed, verify that + // it's handled gracefully + #[tokio::test] + async fn tertiary_connection_closed() { + let _ = tracing_subscriber::fmt() + .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) + .try_init(); + + let mut manager = TransportManagerBuilder::new().build(); + manager.register_transport(SupportedTransport::Tcp, Box::new(DummyTransport::new())); + + let peer = PeerId::random(); + let address1 = Multiaddr::empty() + .with(Protocol::Ip4(Ipv4Addr::new(127, 0, 0, 1))) + .with(Protocol::Tcp(8888)) + .with(Protocol::P2p(Multihash::from_bytes(&peer.to_bytes()).unwrap())); + let address2 = Multiaddr::empty() + .with(Protocol::Ip4(Ipv4Addr::new(192, 168, 1, 173))) + .with(Protocol::Tcp(8888)) + .with(Protocol::P2p(Multihash::from_bytes(&peer.to_bytes()).unwrap())); + let address3 = Multiaddr::empty() + .with(Protocol::Ip4(Ipv4Addr::new(192, 168, 1, 173))) + .with(Protocol::Tcp(9999)) + .with(Protocol::P2p(Multihash::from_bytes(&peer.to_bytes()).unwrap())); + + // remote peer connected to local node + let emit_event = manager + .on_connection_established( + peer, + &Endpoint::listener(address1.clone(), ConnectionId::from(0usize)), + ) + .unwrap(); + assert!(std::matches!(emit_event, ConnectionEstablishedResult::Accept)); + + // The address1 should be ignored because it is an inbound connection + // initiated from an ephemeral port. + let peers = manager.peers.read(); + let context = peers.get(&peer).unwrap(); + assert!(!context.addresses.addresses.contains_key(&address1)); + drop(peers); + + // verify that the peer state is `Connected` with no seconary connection + { + let peers = manager.peers.read(); + let peer = peers.get(&peer).unwrap(); + + match &peer.state { + PeerState::Connected { secondary: None, .. } => {}, + state => panic!("invalid state: {state:?}"), + } + } + + // second connection is established, verify that the seconary connection is tracked + let emit_event = manager + .on_connection_established( + peer, + &Endpoint::dialer(address2.clone(), ConnectionId::from(1usize)), + ) + .unwrap(); + assert!(std::matches!(emit_event, ConnectionEstablishedResult::Accept)); + + // Ensure we keep track of this address. + let peers = manager.peers.read(); + let context = peers.get(&peer).unwrap(); + assert!(context.addresses.addresses.contains_key(&address2)); + drop(peers); + + let peers = manager.peers.read(); + let context = peers.get(&peer).unwrap(); + + match &context.state { + PeerState::Connected { + secondary: Some(SecondaryOrDialing::Secondary(secondary_connection)), + .. + } => { + assert_eq!(secondary_connection.address, address2); + }, + state => panic!("invalid state: {state:?}"), + } + drop(peers); + + // third connection is established, verify that it's discarded + let emit_event = manager + .on_connection_established( + peer, + &Endpoint::listener(address3.clone(), ConnectionId::from(2usize)), + ) + .unwrap(); + assert!(std::matches!(emit_event, ConnectionEstablishedResult::Reject)); + + let peers = manager.peers.read(); + let context = peers.get(&peer).unwrap(); + // The tertiary connection should be ignored because it is an inbound connection + // initiated from an ephemeral port. + assert!(!context.addresses.addresses.contains_key(&address3)); + drop(peers); + + // close the tertiary connection that was ignored + let emit_event = manager.on_connection_closed(peer, ConnectionId::from(2usize)); + assert!(emit_event.is_none()); + + // verify that the state remains unchanged + let peers = manager.peers.read(); + let context = peers.get(&peer).unwrap(); + + match &context.state { + PeerState::Connected { + secondary: Some(SecondaryOrDialing::Secondary(secondary_connection)), + .. + } => { + assert_eq!(secondary_connection.address, address2); + assert_eq!( + context.addresses.addresses.get(&address2).unwrap().score(), + scores::CONNECTION_ESTABLISHED + ); + }, + state => panic!("invalid state: {state:?}"), + } + + drop(peers); + } + #[tokio::test] + #[cfg(debug_assertions)] + #[should_panic] + async fn dial_failure_for_unknow_connection() { + let _ = tracing_subscriber::fmt() + .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) + .try_init(); + + let mut manager = TransportManagerBuilder::new().build(); + + manager.on_dial_failure(ConnectionId::random()).unwrap(); + } + + #[tokio::test] + #[cfg(debug_assertions)] + #[should_panic] + async fn connection_closed_for_unknown_peer() { + let _ = tracing_subscriber::fmt() + .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) + .try_init(); + + let mut manager = TransportManagerBuilder::new().build(); + manager.on_connection_closed(PeerId::random(), ConnectionId::random()).unwrap(); + } + + #[tokio::test] + #[cfg(debug_assertions)] + #[should_panic] + async fn unknown_connection_opened() { + let _ = tracing_subscriber::fmt() + .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) + .try_init(); + + let mut manager = TransportManagerBuilder::new().build(); + manager + .on_connection_opened( + SupportedTransport::Tcp, + ConnectionId::random(), + Multiaddr::empty(), + ) + .unwrap(); + } + + #[tokio::test] + #[cfg(debug_assertions)] + #[should_panic] + async fn connection_opened_for_unknown_peer() { + let _ = tracing_subscriber::fmt() + .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) + .try_init(); + + let mut manager = TransportManagerBuilder::new().build(); + let connection_id = ConnectionId::random(); + let peer = PeerId::random(); + + manager.pending_connections.insert(connection_id, peer); + manager + .on_connection_opened(SupportedTransport::Tcp, connection_id, Multiaddr::empty()) + .unwrap(); + } + + #[tokio::test] + #[cfg(debug_assertions)] + #[should_panic] + async fn connection_established_for_wrong_peer() { + let _ = tracing_subscriber::fmt() + .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) + .try_init(); + + let mut manager = TransportManagerBuilder::new().build(); + let connection_id = ConnectionId::random(); + let peer = PeerId::random(); + + manager.pending_connections.insert(connection_id, peer); + manager + .on_connection_established( + PeerId::random(), + &Endpoint::dialer(Multiaddr::empty(), connection_id), + ) + .unwrap(); + } + + #[tokio::test] + #[cfg(debug_assertions)] + #[should_panic] + async fn open_failure_unknown_connection() { + let _ = tracing_subscriber::fmt() + .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) + .try_init(); + + let mut manager = TransportManagerBuilder::new().build(); + + manager + .on_open_failure(SupportedTransport::Tcp, ConnectionId::random()) + .unwrap(); + } + + #[tokio::test] + #[cfg(debug_assertions)] + #[should_panic] + async fn open_failure_unknown_peer() { + let _ = tracing_subscriber::fmt() + .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) + .try_init(); + + let mut manager = TransportManagerBuilder::new().build(); + let connection_id = ConnectionId::random(); + let peer = PeerId::random(); + + manager.pending_connections.insert(connection_id, peer); + manager.on_open_failure(SupportedTransport::Tcp, connection_id).unwrap(); + } + + #[tokio::test] + async fn no_transports() { + let _ = tracing_subscriber::fmt() + .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) + .try_init(); + + let mut manager = TransportManagerBuilder::new().build(); + + assert!(manager.next().await.is_none()); + } + + #[tokio::test] + async fn dial_already_connected_peer() { + let mut manager = TransportManagerBuilder::new().build(); + + let peer = { + let peer = PeerId::random(); + let mut peers = manager.peers.write(); + + peers.insert( + peer, + PeerContext { + state: PeerState::Connected { + record: ConnectionRecord { + address: Multiaddr::empty() + .with(Protocol::Ip4(std::net::Ipv4Addr::new(127, 0, 0, 1))) + .with(Protocol::Tcp(8888)) + .with(Protocol::P2p(Multihash::from(peer))), + connection_id: ConnectionId::from(0usize), + }, + secondary: None, + }, + + addresses: AddressStore::from_iter( + vec![Multiaddr::empty() + .with(Protocol::Ip4(std::net::Ipv4Addr::new(127, 0, 0, 1))) + .with(Protocol::Tcp(8888)) + .with(Protocol::P2p(Multihash::from(peer)))] + .into_iter(), + ), + }, + ); + drop(peers); + + peer + }; + + match manager.dial(peer).await { + Err(Error::AlreadyConnected) => {}, + _ => panic!("invalid return value"), + } + } + + #[tokio::test] + async fn peer_already_being_dialed() { + let mut manager = TransportManagerBuilder::new().build(); + + let peer = { + let peer = PeerId::random(); + let mut peers = manager.peers.write(); + + peers.insert( + peer, + PeerContext { + state: PeerState::Dialing { + dial_record: ConnectionRecord { + address: Multiaddr::empty() + .with(Protocol::Ip4(std::net::Ipv4Addr::new(127, 0, 0, 1))) + .with(Protocol::Tcp(8888)) + .with(Protocol::P2p(Multihash::from(peer))), + connection_id: ConnectionId::from(0usize), + }, + }, + + addresses: AddressStore::from_iter( + vec![Multiaddr::empty() + .with(Protocol::Ip4(std::net::Ipv4Addr::new(127, 0, 0, 1))) + .with(Protocol::Tcp(8888)) + .with(Protocol::P2p(Multihash::from(peer)))] + .into_iter(), + ), + }, + ); + drop(peers); + + peer + }; + + manager.dial(peer).await.unwrap(); + + // Check state is unaltered. + { + let peers = manager.peers.read(); + let peer_context = peers.get(&peer).unwrap(); + + match &peer_context.state { + PeerState::Dialing { dial_record } => { + assert_eq!( + dial_record.address, + Multiaddr::empty() + .with(Protocol::Ip4(std::net::Ipv4Addr::new(127, 0, 0, 1))) + .with(Protocol::Tcp(8888)) + .with(Protocol::P2p(Multihash::from(peer))) + ); + }, + state => panic!("invalid state: {state:?}"), + } + } + } + + #[tokio::test] + async fn pending_connection_for_disconnected_peer() { + let mut manager = TransportManagerBuilder::new().build(); + + let peer = { + let peer = PeerId::random(); + let mut peers = manager.peers.write(); + + peers.insert( + peer, + PeerContext { + state: PeerState::Disconnected { + dial_record: Some(ConnectionRecord::new( + peer, + Multiaddr::empty() + .with(Protocol::Ip4(std::net::Ipv4Addr::new(127, 0, 0, 1))) + .with(Protocol::Tcp(8888)) + .with(Protocol::P2p(Multihash::from(peer))), + ConnectionId::from(0), + )), + }, + + addresses: AddressStore::new(), + }, + ); + drop(peers); + + peer + }; + + manager.dial(peer).await.unwrap(); + } + + #[tokio::test] + async fn dial_address_invalid_transport() { + let _ = tracing_subscriber::fmt() + .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) + .try_init(); + + let mut manager = TransportManagerBuilder::new().build(); + + // transport doesn't start with ip/dns + { + let address = Multiaddr::empty().with(Protocol::P2p(Multihash::from(PeerId::random()))); + match manager.dial_address(address.clone()).await { + Err(Error::TransportNotSupported(dial_address)) => { + assert_eq!(dial_address, address); + }, + _ => panic!("invalid return value"), + } + } + + { + // upd-based protocol but not quic + let address = Multiaddr::empty() + .with(Protocol::Ip4(std::net::Ipv4Addr::new(127, 0, 0, 1))) + .with(Protocol::Udp(8888)) + .with(Protocol::Utp) + .with(Protocol::P2p(Multihash::from(PeerId::random()))); + match manager.dial_address(address.clone()).await { + Err(Error::TransportNotSupported(dial_address)) => { + assert_eq!(dial_address, address); + }, + res => panic!("invalid return value: {res:?}"), + } + } + + // not tcp nor udp + { + let address = Multiaddr::empty() + .with(Protocol::Ip4(std::net::Ipv4Addr::new(127, 0, 0, 1))) + .with(Protocol::Sctp(8888)) + .with(Protocol::P2p(Multihash::from(PeerId::random()))); + match manager.dial_address(address.clone()).await { + Err(Error::TransportNotSupported(dial_address)) => { + assert_eq!(dial_address, address); + }, + _ => panic!("invalid return value"), + } + } + + // random protocol after tcp + { + let address = Multiaddr::empty() + .with(Protocol::Ip4(std::net::Ipv4Addr::new(127, 0, 0, 1))) + .with(Protocol::Tcp(8888)) + .with(Protocol::Utp) + .with(Protocol::P2p(Multihash::from(PeerId::random()))); + match manager.dial_address(address.clone()).await { + Err(Error::TransportNotSupported(dial_address)) => { + assert_eq!(dial_address, address); + }, + _ => panic!("invalid return value"), + } + } + } + + #[tokio::test] + async fn dial_address_peer_id_missing() { + let mut manager = TransportManagerBuilder::new().build(); + + async fn call_manager(manager: &mut TransportManager, address: Multiaddr) { + match manager.dial_address(address).await { + Err(Error::AddressError(AddressError::PeerIdMissing)) => {}, + _ => panic!("invalid return value"), + } + } + + { + call_manager( + &mut manager, + Multiaddr::empty() + .with(Protocol::Ip4(std::net::Ipv4Addr::new(127, 0, 0, 1))) + .with(Protocol::Tcp(8888)), + ) + .await; + } + + { + call_manager( + &mut manager, + Multiaddr::empty() + .with(Protocol::Ip4(std::net::Ipv4Addr::new(127, 0, 0, 1))) + .with(Protocol::Tcp(8888)) + .with(Protocol::Wss(std::borrow::Cow::Owned("".to_string()))), + ) + .await; + } + + { + call_manager( + &mut manager, + Multiaddr::empty() + .with(Protocol::Ip4(std::net::Ipv4Addr::new(127, 0, 0, 1))) + .with(Protocol::Udp(8888)) + .with(Protocol::QuicV1), + ) + .await; + } + } + + #[tokio::test] + async fn inbound_connection_while_dialing() { + let _ = tracing_subscriber::fmt() + .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) + .try_init(); + + let mut manager = TransportManagerBuilder::new().build(); + let peer = PeerId::random(); + let dial_address = Multiaddr::empty() + .with(Protocol::Ip4(Ipv4Addr::new(127, 0, 0, 1))) + .with(Protocol::Tcp(8888)) + .with(Protocol::P2p(Multihash::from_bytes(&peer.to_bytes()).unwrap())); + + let connection_id = ConnectionId::random(); + let transport = Box::new({ + let mut transport = DummyTransport::new(); + transport.inject_event(TransportEvent::ConnectionEstablished { + peer, + endpoint: Endpoint::listener(dial_address.clone(), connection_id), + }); + transport + }); + manager.register_transport(SupportedTransport::Tcp, transport); + manager.add_known_address( + peer, + vec![Multiaddr::empty() + .with(Protocol::Ip4(Ipv4Addr::new(192, 168, 1, 5))) + .with(Protocol::Tcp(8888)) + .with(Protocol::P2p(Multihash::from(peer)))] + .into_iter(), + ); + + assert!(manager.dial(peer).await.is_ok()); + assert!(!manager.pending_connections.is_empty()); + + { + let peers = manager.peers.read(); + + match peers.get(&peer) { + Some(PeerContext { state: PeerState::Opening { .. }, .. }) => {}, + state => panic!("invalid state for peer: {state:?}"), + } + } + + match manager.next().await.unwrap() { + TransportEvent::ConnectionEstablished { + peer: event_peer, + endpoint: event_endpoint, + .. + } => { + assert_eq!(peer, event_peer); + assert_eq!(event_endpoint, Endpoint::listener(dial_address.clone(), connection_id),); + }, + event => panic!("invalid event: {event:?}"), + } + assert!(manager.pending_connections.is_empty()); + + let peers = manager.peers.read(); + match peers.get(&peer).unwrap() { + PeerContext { state: PeerState::Connected { record, secondary }, addresses } => { + assert!(!addresses.addresses.contains_key(&record.address)); + assert!(secondary.is_none()); + assert_eq!(record.address, dial_address); + assert_eq!(record.connection_id, connection_id); + }, + state => panic!("invalid peer state: {state:?}"), + } + } + + #[tokio::test] + async fn inbound_connection_for_same_address_while_dialing() { + let _ = tracing_subscriber::fmt() + .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) + .try_init(); + + let mut manager = TransportManagerBuilder::new().build(); + let peer = PeerId::random(); + let dial_address = Multiaddr::empty() + .with(Protocol::Ip4(Ipv4Addr::new(127, 0, 0, 1))) + .with(Protocol::Tcp(8888)) + .with(Protocol::P2p(Multihash::from_bytes(&peer.to_bytes()).unwrap())); + + let connection_id = ConnectionId::random(); + let transport = Box::new({ + let mut transport = DummyTransport::new(); + transport.inject_event(TransportEvent::ConnectionEstablished { + peer, + endpoint: Endpoint::listener(dial_address.clone(), connection_id), + }); + transport + }); + manager.register_transport(SupportedTransport::Tcp, transport); + manager.add_known_address( + peer, + vec![Multiaddr::empty() + .with(Protocol::Ip4(Ipv4Addr::new(127, 0, 0, 1))) + .with(Protocol::Tcp(8888)) + .with(Protocol::P2p(Multihash::from(peer)))] + .into_iter(), + ); + + assert!(manager.dial(peer).await.is_ok()); + assert!(!manager.pending_connections.is_empty()); + + { + let peers = manager.peers.read(); + + match peers.get(&peer) { + Some(PeerContext { state: PeerState::Opening { .. }, .. }) => {}, + state => panic!("invalid state for peer: {state:?}"), + } + } + + match manager.next().await.unwrap() { + TransportEvent::ConnectionEstablished { + peer: event_peer, + endpoint: event_endpoint, + .. + } => { + assert_eq!(peer, event_peer); + assert_eq!(event_endpoint, Endpoint::listener(dial_address.clone(), connection_id),); + }, + event => panic!("invalid event: {event:?}"), + } + assert!(manager.pending_connections.is_empty()); + + let peers = manager.peers.read(); + match peers.get(&peer).unwrap() { + PeerContext { state: PeerState::Connected { record, secondary }, addresses } => { + // Saved from the dial attempt. + assert_eq!(addresses.addresses.get(&dial_address).unwrap().score(), 0); + + assert!(secondary.is_none()); + assert_eq!(record.address, dial_address); + assert_eq!(record.connection_id, connection_id); + }, + state => panic!("invalid peer state: {state:?}"), + } + } + + #[tokio::test] + async fn manager_limits_incoming_connections() { + let _ = tracing_subscriber::fmt() + .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) + .try_init(); + + let mut manager = TransportManagerBuilder::new() + .with_connection_limits_config( + ConnectionLimitsConfig::default() + .max_incoming_connections(Some(3)) + .max_outgoing_connections(Some(2)), + ) + .build(); + // The connection limit is agnostic of the underlying transports. + manager.register_transport(SupportedTransport::Tcp, Box::new(DummyTransport::new())); + + let peer = PeerId::random(); + let second_peer = PeerId::random(); + + // Setup addresses. + let (first_addr, first_connection_id) = setup_dial_addr(peer, 0); + let (second_addr, second_connection_id) = setup_dial_addr(second_peer, 1); + let (_, third_connection_id) = setup_dial_addr(peer, 2); + let (_, remote_connection_id) = setup_dial_addr(peer, 3); + + // Peer established the first inbound connection. + let result = manager + .on_connection_established( + peer, + &Endpoint::listener(first_addr.clone(), first_connection_id), + ) + .unwrap(); + assert_eq!(result, ConnectionEstablishedResult::Accept); + + // The peer is allowed to dial us a second time. + let result = manager + .on_connection_established( + peer, + &Endpoint::listener(first_addr.clone(), second_connection_id), + ) + .unwrap(); + assert_eq!(result, ConnectionEstablishedResult::Accept); + + // Second peer calls us. + let result = manager + .on_connection_established( + second_peer, + &Endpoint::listener(second_addr.clone(), third_connection_id), + ) + .unwrap(); + assert_eq!(result, ConnectionEstablishedResult::Accept); + + // Limits of inbound connections are reached. + let result = manager + .on_connection_established( + second_peer, + &Endpoint::listener(second_addr.clone(), remote_connection_id), + ) + .unwrap(); + assert_eq!(result, ConnectionEstablishedResult::Reject); + + // Close one connection. + assert!(manager.on_connection_closed(peer, first_connection_id).is_none()); + + // The second peer can establish 2 inbounds now. + let result = manager + .on_connection_established( + second_peer, + &Endpoint::listener(second_addr.clone(), remote_connection_id), + ) + .unwrap(); + assert_eq!(result, ConnectionEstablishedResult::Accept); + } + + #[tokio::test] + async fn manager_limits_outbound_connections() { + let _ = tracing_subscriber::fmt() + .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) + .try_init(); + + let mut manager = TransportManagerBuilder::new() + .with_connection_limits_config( + ConnectionLimitsConfig::default() + .max_incoming_connections(Some(3)) + .max_outgoing_connections(Some(2)), + ) + .build(); + // The connection limit is agnostic of the underlying transports. + manager.register_transport(SupportedTransport::Tcp, Box::new(DummyTransport::new())); + + let peer = PeerId::random(); + let second_peer = PeerId::random(); + let third_peer = PeerId::random(); + + // Setup addresses. + let (first_addr, first_connection_id) = setup_dial_addr(peer, 0); + let (second_addr, second_connection_id) = setup_dial_addr(second_peer, 1); + let (third_addr, third_connection_id) = setup_dial_addr(third_peer, 2); + + // First dial. + manager.dial_address(first_addr.clone()).await.unwrap(); + + // Second dial. + manager.dial_address(second_addr.clone()).await.unwrap(); + + // Third dial, we have a limit on 2 outbound connections. + manager.dial_address(third_addr.clone()).await.unwrap(); + + let result = manager + .on_connection_established( + peer, + &Endpoint::dialer(first_addr.clone(), first_connection_id), + ) + .unwrap(); + + assert_eq!(result, ConnectionEstablishedResult::Accept); + + let result = manager + .on_connection_established( + second_peer, + &Endpoint::dialer(second_addr.clone(), second_connection_id), + ) + .unwrap(); + assert_eq!(result, ConnectionEstablishedResult::Accept); + + // We have reached the limit now. + let result = manager + .on_connection_established( + third_peer, + &Endpoint::dialer(third_addr.clone(), third_connection_id), + ) + .unwrap(); + assert_eq!(result, ConnectionEstablishedResult::Reject); + + // While we have 2 outbound connections active, any dials will fail immediately. + // We cannot perform this check for the non negotiated inbound connections yet, + // since the transport will eagerly accept and negotiate them. This requires + // a refactor into the transport manager, to not waste resources on + // negotiating connections that will be rejected. + let result = manager.dial(peer).await.unwrap_err(); + assert!(std::matches!( + result, + Error::ConnectionLimit(limits::ConnectionLimitsError::MaxOutgoingConnectionsExceeded) + )); + let result = manager.dial_address(first_addr.clone()).await.unwrap_err(); + assert!(std::matches!( + result, + Error::ConnectionLimit(limits::ConnectionLimitsError::MaxOutgoingConnectionsExceeded) + )); + + // Close one connection. + assert!(manager.on_connection_closed(peer, first_connection_id).is_some()); + // We can now dial again. + manager.dial_address(first_addr.clone()).await.unwrap(); + + let result = manager + .on_connection_established(peer, &Endpoint::dialer(first_addr, first_connection_id)) + .unwrap(); + assert_eq!(result, ConnectionEstablishedResult::Accept); + } + + #[tokio::test] + async fn reject_unknown_secondary_connections_with_different_connection_ids() { + let _ = tracing_subscriber::fmt() + .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) + .try_init(); + + let mut manager = TransportManagerBuilder::new().build(); + manager.register_transport(SupportedTransport::Tcp, Box::new(DummyTransport::new())); + + // Random peer ID. + let peer = PeerId::random(); + let (first_addr, _first_connection_id) = setup_dial_addr(peer, 0); + let second_connection_id = ConnectionId::from(1); + let different_connection_id = ConnectionId::from(2); + + // Setup a connected peer with a dial record active. + { + let mut peers = manager.peers.write(); + + let state = PeerState::Connected { + record: ConnectionRecord::new(peer, first_addr.clone(), ConnectionId::from(0)), + secondary: Some(SecondaryOrDialing::Dialing(ConnectionRecord::new( + peer, + first_addr.clone(), + second_connection_id, + ))), + }; + + let peer_context = PeerContext { + state, + addresses: AddressStore::from_iter(vec![first_addr.clone()].into_iter()), + }; + + peers.insert(peer, peer_context); + } + + // Establish a connection, however the connection ID is different. + let result = manager + .on_connection_established( + peer, + &Endpoint::dialer(first_addr.clone(), different_connection_id), + ) + .unwrap(); + assert_eq!(result, ConnectionEstablishedResult::Reject); + } + + #[tokio::test] + async fn guard_against_secondary_connections_with_different_connection_ids() { + // This is the repro case for https://github.com/paritytech/litep2p/issues/172. + let _ = tracing_subscriber::fmt() + .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) + .try_init(); + + let mut manager = TransportManagerBuilder::new().build(); + manager.register_transport(SupportedTransport::Tcp, Box::new(DummyTransport::new())); + + // Random peer ID. + let peer = PeerId::random(); + + let setup_dial_addr = |connection_id: u16| { + let dial_address = Multiaddr::empty() + .with(Protocol::Ip4(Ipv4Addr::new(127, 0, 0, 1))) + .with(Protocol::Tcp(8888 + connection_id)) + .with(Protocol::P2p(Multihash::from_bytes(&peer.to_bytes()).unwrap())); + let connection_id = ConnectionId::from(connection_id as usize); + + (dial_address, connection_id) + }; + + // Setup addresses. + let (first_addr, first_connection_id) = setup_dial_addr(0); + let (second_addr, _second_connection_id) = setup_dial_addr(1); + let (remote_addr, remote_connection_id) = setup_dial_addr(2); + + // Step 1. Dialing state to peer. + manager.dial_address(first_addr.clone()).await.unwrap(); + { + let peers = manager.peers.read(); + let peer_context = peers.get(&peer).unwrap(); + match &peer_context.state { + PeerState::Dialing { dial_record } => { + assert_eq!(dial_record.address, first_addr); + }, + state => panic!("invalid state: {state:?}"), + } + } + + // Step 2. Connection established by the remote peer. + let result = manager + .on_connection_established( + peer, + &Endpoint::listener(remote_addr.clone(), remote_connection_id), + ) + .unwrap(); + assert_eq!(result, ConnectionEstablishedResult::Accept); + { + let peers = manager.peers.read(); + let peer_context = peers.get(&peer).unwrap(); + match &peer_context.state { + PeerState::Connected { + record, + secondary: Some(SecondaryOrDialing::Dialing(dial_record)), + } => { + assert_eq!(record.address, remote_addr); + assert_eq!(record.connection_id, remote_connection_id); + + assert_eq!(dial_record.address, first_addr); + assert_eq!(dial_record.connection_id, first_connection_id) + }, + state => panic!("invalid state: {state:?}"), + } + } + + // Step 3. The peer disconnects while we have a dialing in flight. + let event = manager.on_connection_closed(peer, remote_connection_id).unwrap(); + match event { + TransportEvent::ConnectionClosed { + peer: event_peer, + connection_id: event_connection_id, + } => { + assert_eq!(peer, event_peer); + assert_eq!(event_connection_id, remote_connection_id); + }, + event => panic!("invalid event: {event:?}"), + } + { + let peers = manager.peers.read(); + let peer_context = peers.get(&peer).unwrap(); + match &peer_context.state { + PeerState::Disconnected { dial_record } => { + let dial_record = dial_record.as_ref().unwrap(); + assert_eq!(dial_record.address, first_addr); + assert_eq!(dial_record.connection_id, first_connection_id); + }, + state => panic!("invalid state: {state:?}"), + } + } + + // Step 4. Dial by the second address and expect to not overwrite the state. + manager.dial_address(second_addr.clone()).await.unwrap(); + // The state remains unchanged since we already have a dialing in flight. + { + let peers = manager.peers.read(); + let peer_context = peers.get(&peer).unwrap(); + match &peer_context.state { + PeerState::Disconnected { dial_record } => { + let dial_record = dial_record.as_ref().unwrap(); + assert_eq!(dial_record.address, first_addr); + assert_eq!(dial_record.connection_id, first_connection_id); + }, + state => panic!("invalid state: {state:?}"), + } + } + + // Step 5. Remote peer reconnects again. + let result = manager + .on_connection_established( + peer, + &Endpoint::listener(remote_addr.clone(), remote_connection_id), + ) + .unwrap(); + assert_eq!(result, ConnectionEstablishedResult::Accept); + { + let peers = manager.peers.read(); + let peer_context = peers.get(&peer).unwrap(); + match &peer_context.state { + PeerState::Connected { + record, + secondary: Some(SecondaryOrDialing::Dialing(dial_record)), + } => { + assert_eq!(record.address, remote_addr); + assert_eq!(record.connection_id, remote_connection_id); + + // We have not overwritten the first dial record in step 4. + assert_eq!(dial_record.address, first_addr); + assert_eq!(dial_record.connection_id, first_connection_id); + }, + state => panic!("invalid state: {state:?}"), + } + } + + // Step 6. First dial responds. + let result = manager + .on_connection_established( + peer, + &Endpoint::dialer(first_addr.clone(), first_connection_id), + ) + .unwrap(); + assert_eq!(result, ConnectionEstablishedResult::Accept); + } + + #[tokio::test] + async fn persist_dial_addresses() { + let _ = tracing_subscriber::fmt() + .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) + .try_init(); + + let mut manager = TransportManagerBuilder::new().build(); + let peer = PeerId::random(); + let dial_address = Multiaddr::empty() + .with(Protocol::Ip4(Ipv4Addr::new(127, 0, 0, 1))) + .with(Protocol::Tcp(8888)) + .with(Protocol::P2p(Multihash::from_bytes(&peer.to_bytes()).unwrap())); + + let connection_id = ConnectionId::from(0); + let transport = Box::new({ + let mut transport = DummyTransport::new(); + transport.inject_event(TransportEvent::ConnectionEstablished { + peer, + endpoint: Endpoint::listener(dial_address.clone(), connection_id), + }); + transport + }); + manager.register_transport(SupportedTransport::Tcp, transport); + + // First dial attempt. + manager.dial_address(dial_address.clone()).await.unwrap(); + // check the state of the peer. + { + let peers = manager.peers.read(); + let peer_context = peers.get(&peer).unwrap(); + match &peer_context.state { + PeerState::Dialing { dial_record } => { + assert_eq!(dial_record.address, dial_address); + }, + state => panic!("invalid state: {state:?}"), + } + + // The address is saved for future dials. + assert_eq!(peer_context.addresses.addresses.get(&dial_address).unwrap().score(), 0); + } + + let second_address = Multiaddr::empty() + .with(Protocol::Ip4(Ipv4Addr::new(127, 0, 0, 1))) + .with(Protocol::Tcp(8889)) + .with(Protocol::P2p(Multihash::from_bytes(&peer.to_bytes()).unwrap())); + + // Second dial attempt with different address. + manager.dial_address(second_address.clone()).await.unwrap(); + // check the state of the peer. + { + let peers = manager.peers.read(); + let peer_context = peers.get(&peer).unwrap(); + match &peer_context.state { + // Must still be dialing the first address. + PeerState::Dialing { dial_record } => { + assert_eq!(dial_record.address, dial_address); + }, + state => panic!("invalid state: {state:?}"), + } + + // The address is still saved, even if a second dial is not initiated. + assert_eq!(peer_context.addresses.addresses.get(&dial_address).unwrap().score(), 0); + assert_eq!(peer_context.addresses.addresses.get(&second_address).unwrap().score(), 0); + } + } + + #[cfg(feature = "websocket")] + #[tokio::test] + async fn opening_errors_are_reported() { + let _ = tracing_subscriber::fmt() + .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) + .try_init(); + + let mut manager = TransportManagerBuilder::new().build(); + let peer = PeerId::random(); + let connection_id = ConnectionId::from(0); + + // Setup TCP transport. + let dial_address_tcp = Multiaddr::empty() + .with(Protocol::Ip4(Ipv4Addr::new(127, 0, 0, 1))) + .with(Protocol::Tcp(8888)) + .with(Protocol::P2p(Multihash::from_bytes(&peer.to_bytes()).unwrap())); + let transport = Box::new({ + let mut transport = DummyTransport::new(); + transport.inject_event(TransportEvent::OpenFailure { + connection_id, + errors: vec![(dial_address_tcp.clone(), DialError::Timeout)], + }); + transport + }); + manager.register_transport(SupportedTransport::Tcp, transport); + manager.add_known_address( + peer, + vec![Multiaddr::empty() + .with(Protocol::Ip4(Ipv4Addr::new(192, 168, 1, 5))) + .with(Protocol::Tcp(8888)) + .with(Protocol::P2p(Multihash::from(peer)))] + .into_iter(), + ); + + // Setup WebSockets transport. + let dial_address_ws = Multiaddr::empty() + .with(Protocol::Ip4(Ipv4Addr::new(127, 0, 0, 1))) + .with(Protocol::Tcp(8889)) + .with(Protocol::Ws(Cow::Borrowed("/"))) + .with(Protocol::P2p(Multihash::from_bytes(&peer.to_bytes()).unwrap())); + + let transport = Box::new({ + let mut transport = DummyTransport::new(); + transport.inject_event(TransportEvent::OpenFailure { + connection_id, + errors: vec![(dial_address_ws.clone(), DialError::Timeout)], + }); + transport + }); + manager.register_transport(SupportedTransport::WebSocket, transport); + manager.add_known_address( + peer, + vec![Multiaddr::empty() + .with(Protocol::Ip4(Ipv4Addr::new(192, 168, 1, 5))) + .with(Protocol::Tcp(8889)) + .with(Protocol::Ws(Cow::Borrowed("/"))) + .with(Protocol::P2p(Multihash::from_bytes(&peer.to_bytes()).unwrap()))] + .into_iter(), + ); + + // Dial the peer on both transports. + assert!(manager.dial(peer).await.is_ok()); + assert!(!manager.pending_connections.is_empty()); + + { + let peers = manager.peers.read(); + + match peers.get(&peer) { + Some(PeerContext { state: PeerState::Opening { .. }, .. }) => {}, + state => panic!("invalid state for peer: {state:?}"), + } + } + + match manager.next().await.unwrap() { + TransportEvent::OpenFailure { connection_id, errors } => { + assert_eq!(connection_id, ConnectionId::from(0)); + assert_eq!(errors.len(), 2); + let tcp = errors.iter().find(|(addr, _)| addr == &dial_address_tcp).unwrap(); + assert!(std::matches!(tcp.1, DialError::Timeout)); + + let ws = errors.iter().find(|(addr, _)| addr == &dial_address_ws).unwrap(); + assert!(std::matches!(ws.1, DialError::Timeout)); + }, + event => panic!("invalid event: {event:?}"), + } + assert!(manager.pending_connections.is_empty()); + assert!(manager.opening_errors.is_empty()); + } } diff --git a/client/litep2p/src/transport/manager/peer_state.rs b/client/litep2p/src/transport/manager/peer_state.rs index ec18e918..d31c63b0 100644 --- a/client/litep2p/src/transport/manager/peer_state.rs +++ b/client/litep2p/src/transport/manager/peer_state.rs @@ -21,12 +21,12 @@ //! Peer state management. use crate::{ - transport::{ - manager::{SupportedTransport, LOG_TARGET}, - Endpoint, - }, - types::ConnectionId, - PeerId, + transport::{ + manager::{SupportedTransport, LOG_TARGET}, + Endpoint, + }, + types::ConnectionId, + PeerId, }; use multiaddr::{Multiaddr, Protocol}; @@ -85,345 +85,302 @@ use std::collections::HashSet; /// `on_connection_established` when an incoming connection is accepted) #[derive(Debug, Clone, PartialEq)] pub enum PeerState { - /// `Litep2p` is connected to peer. - Connected { - /// The established record of the connection. - record: ConnectionRecord, - - /// Secondary record, this can either be a dial record or an established connection. - /// - /// While the local node was dialing a remote peer, the remote peer might've dialed - /// the local node and connection was established successfully. The original dial - /// address is stored for processing later when the dial attempt concludes as - /// either successful/failed. - secondary: Option, - }, - - /// Connection to peer is opening over one or more addresses. - Opening { - /// Address records used for dialing. - addresses: HashSet, - - /// Connection ID. - connection_id: ConnectionId, - - /// Active transports. - transports: HashSet, - }, - - /// Peer is being dialed. - Dialing { - /// Address record. - dial_record: ConnectionRecord, - }, - - /// `Litep2p` is not connected to peer. - Disconnected { - /// Dial address, if it exists. - /// - /// While the local node was dialing a remote peer, the remote peer might've dialed - /// the local node and connection was established successfully. The connection might've - /// been closed before the dial concluded which means that - /// [`crate::transport::manager::TransportManager`] must be prepared to handle the dial - /// failure even after the connection has been closed. - dial_record: Option, - }, + /// `Litep2p` is connected to peer. + Connected { + /// The established record of the connection. + record: ConnectionRecord, + + /// Secondary record, this can either be a dial record or an established connection. + /// + /// While the local node was dialing a remote peer, the remote peer might've dialed + /// the local node and connection was established successfully. The original dial + /// address is stored for processing later when the dial attempt concludes as + /// either successful/failed. + secondary: Option, + }, + + /// Connection to peer is opening over one or more addresses. + Opening { + /// Address records used for dialing. + addresses: HashSet, + + /// Connection ID. + connection_id: ConnectionId, + + /// Active transports. + transports: HashSet, + }, + + /// Peer is being dialed. + Dialing { + /// Address record. + dial_record: ConnectionRecord, + }, + + /// `Litep2p` is not connected to peer. + Disconnected { + /// Dial address, if it exists. + /// + /// While the local node was dialing a remote peer, the remote peer might've dialed + /// the local node and connection was established successfully. The connection might've + /// been closed before the dial concluded which means that + /// [`crate::transport::manager::TransportManager`] must be prepared to handle the dial + /// failure even after the connection has been closed. + dial_record: Option, + }, } /// The state of the secondary connection. #[derive(Debug, Clone, PartialEq)] pub enum SecondaryOrDialing { - /// The secondary connection is established. - Secondary(ConnectionRecord), - /// The primary connection is established, but the secondary connection is still dialing. - Dialing(ConnectionRecord), + /// The secondary connection is established. + Secondary(ConnectionRecord), + /// The primary connection is established, but the secondary connection is still dialing. + Dialing(ConnectionRecord), } /// Result of initiating a dial. #[derive(Debug, Clone, PartialEq)] pub enum StateDialResult { - /// The peer is already connected. - AlreadyConnected, - /// The dialing state is already in progress. - DialingInProgress, - /// The peer is disconnected, start dialing. - Ok, + /// The peer is already connected. + AlreadyConnected, + /// The dialing state is already in progress. + DialingInProgress, + /// The peer is disconnected, start dialing. + Ok, } impl PeerState { - /// Check if the peer can be dialed. - pub fn can_dial(&self) -> StateDialResult { - match self { - // The peer is already connected, no need to dial again. - Self::Connected { .. } => StateDialResult::AlreadyConnected, - // The dialing state is already in progress, an event will be emitted later. - Self::Dialing { .. } - | Self::Opening { .. } - | Self::Disconnected { - dial_record: Some(_), - } => StateDialResult::DialingInProgress, - - Self::Disconnected { dial_record: None } => StateDialResult::Ok, - } - } - - /// Dial the peer on a single address. - pub fn dial_single_address(&mut self, dial_record: ConnectionRecord) -> StateDialResult { - match self.can_dial() { - StateDialResult::Ok => { - *self = PeerState::Dialing { dial_record }; - StateDialResult::Ok - } - reason => reason, - } - } - - /// Dial the peer on multiple addresses. - pub fn dial_addresses( - &mut self, - connection_id: ConnectionId, - addresses: HashSet, - transports: HashSet, - ) -> StateDialResult { - match self.can_dial() { - StateDialResult::Ok => { - *self = PeerState::Opening { - addresses, - connection_id, - transports, - }; - StateDialResult::Ok - } - reason => reason, - } - } - - /// Handle dial failure. - /// - /// # Transitions - /// - /// - [`PeerState::Dialing`] (with record) -> [`PeerState::Disconnected`] - /// - [`PeerState::Connected`] (with dial record) -> [`PeerState::Connected`] - /// - [`PeerState::Disconnected`] (with dial record) -> [`PeerState::Disconnected`] - /// - /// Returns `true` if the connection was handled. - pub fn on_dial_failure(&mut self, connection_id: ConnectionId) -> bool { - match self { - // Clear the dial record if the connection ID matches. - Self::Dialing { dial_record } => - if dial_record.connection_id == connection_id { - *self = Self::Disconnected { dial_record: None }; - return true; - }, - - Self::Connected { - record, - secondary: Some(SecondaryOrDialing::Dialing(dial_record)), - } => - if dial_record.connection_id == connection_id { - *self = Self::Connected { - record: record.clone(), - secondary: None, - }; - return true; - }, - - Self::Disconnected { - dial_record: Some(dial_record), - } => - if dial_record.connection_id == connection_id { - *self = Self::Disconnected { dial_record: None }; - return true; - }, - - Self::Opening { .. } | Self::Connected { .. } | Self::Disconnected { .. } => - return false, - }; - - false - } - - /// Returns `true` if the connection should be accepted by the transport manager. - pub fn on_connection_established(&mut self, connection: ConnectionRecord) -> bool { - match self { - // Transform the dial record into a secondary connection. - Self::Connected { - record, - secondary: Some(SecondaryOrDialing::Dialing(dial_record)), - } => - if dial_record.connection_id == connection.connection_id { - *self = Self::Connected { - record: record.clone(), - secondary: Some(SecondaryOrDialing::Secondary(connection)), - }; - - return true; - }, - - // There's place for a secondary connection. - Self::Connected { - record, - secondary: None, - } => { - *self = Self::Connected { - record: record.clone(), - secondary: Some(SecondaryOrDialing::Secondary(connection)), - }; - - return true; - } - - // Convert the dial record into a primary connection or preserve it. - Self::Dialing { dial_record } - | Self::Disconnected { - dial_record: Some(dial_record), - } => - if dial_record.connection_id == connection.connection_id { - *self = Self::Connected { - record: connection.clone(), - secondary: None, - }; - return true; - } else { - *self = Self::Connected { - record: connection, - secondary: Some(SecondaryOrDialing::Dialing(dial_record.clone())), - }; - return true; - }, - - Self::Disconnected { dial_record: None } => { - *self = Self::Connected { - record: connection, - secondary: None, - }; - - return true; - } - - // Accept the incoming connection. - Self::Opening { - addresses, - connection_id, - .. - } => { - tracing::trace!( - target: LOG_TARGET, - ?connection, - opening_addresses = ?addresses, - opening_connection_id = ?connection_id, - "Connection established while opening" - ); - - *self = Self::Connected { - record: connection, - secondary: None, - }; - - return true; - } - - _ => {} - }; - - false - } - - /// Returns `true` if the connection was closed. - pub fn on_connection_closed(&mut self, connection_id: ConnectionId) -> bool { - match self { - Self::Connected { record, secondary } => { - // Primary connection closed. - if record.connection_id == connection_id { - match secondary { - // Promote secondary connection to primary. - Some(SecondaryOrDialing::Secondary(secondary)) => { - *self = Self::Connected { - record: secondary.clone(), - secondary: None, - }; - } - // Preserve the dial record. - Some(SecondaryOrDialing::Dialing(dial_record)) => { - *self = Self::Disconnected { - dial_record: Some(dial_record.clone()), - }; - - return true; - } - None => { - *self = Self::Disconnected { dial_record: None }; - - return true; - } - }; - - return false; - } - - match secondary { - // Secondary connection closed. - Some(SecondaryOrDialing::Secondary(secondary)) - if secondary.connection_id == connection_id => - { - *self = Self::Connected { - record: record.clone(), - secondary: None, - }; - } - _ => (), - } - } - _ => (), - } - - false - } - - /// Returns `true` if the last transport failed to open. - pub fn on_open_failure(&mut self, transport: SupportedTransport) -> bool { - match self { - Self::Opening { transports, .. } => { - transports.remove(&transport); - - if transports.is_empty() { - *self = Self::Disconnected { dial_record: None }; - return true; - } - - false - } - _ => false, - } - } - - /// Returns `true` if the connection was opened. - pub fn on_connection_opened(&mut self, record: ConnectionRecord) -> bool { - match self { - Self::Opening { - addresses, - connection_id, - .. - } => { - if record.connection_id != *connection_id || !addresses.contains(&record.address) { - tracing::warn!( - target: LOG_TARGET, - ?record, - ?addresses, - ?connection_id, - "Connection opened for unknown address or connection ID", - ); - } - - *self = Self::Dialing { - dial_record: record.clone(), - }; - - true - } - _ => false, - } - } + /// Check if the peer can be dialed. + pub fn can_dial(&self) -> StateDialResult { + match self { + // The peer is already connected, no need to dial again. + Self::Connected { .. } => StateDialResult::AlreadyConnected, + // The dialing state is already in progress, an event will be emitted later. + Self::Dialing { .. } | + Self::Opening { .. } | + Self::Disconnected { dial_record: Some(_) } => StateDialResult::DialingInProgress, + + Self::Disconnected { dial_record: None } => StateDialResult::Ok, + } + } + + /// Dial the peer on a single address. + pub fn dial_single_address(&mut self, dial_record: ConnectionRecord) -> StateDialResult { + match self.can_dial() { + StateDialResult::Ok => { + *self = PeerState::Dialing { dial_record }; + StateDialResult::Ok + }, + reason => reason, + } + } + + /// Dial the peer on multiple addresses. + pub fn dial_addresses( + &mut self, + connection_id: ConnectionId, + addresses: HashSet, + transports: HashSet, + ) -> StateDialResult { + match self.can_dial() { + StateDialResult::Ok => { + *self = PeerState::Opening { addresses, connection_id, transports }; + StateDialResult::Ok + }, + reason => reason, + } + } + + /// Handle dial failure. + /// + /// # Transitions + /// + /// - [`PeerState::Dialing`] (with record) -> [`PeerState::Disconnected`] + /// - [`PeerState::Connected`] (with dial record) -> [`PeerState::Connected`] + /// - [`PeerState::Disconnected`] (with dial record) -> [`PeerState::Disconnected`] + /// + /// Returns `true` if the connection was handled. + pub fn on_dial_failure(&mut self, connection_id: ConnectionId) -> bool { + match self { + // Clear the dial record if the connection ID matches. + Self::Dialing { dial_record } => + if dial_record.connection_id == connection_id { + *self = Self::Disconnected { dial_record: None }; + return true; + }, + + Self::Connected { + record, + secondary: Some(SecondaryOrDialing::Dialing(dial_record)), + } => + if dial_record.connection_id == connection_id { + *self = Self::Connected { record: record.clone(), secondary: None }; + return true; + }, + + Self::Disconnected { dial_record: Some(dial_record) } => + if dial_record.connection_id == connection_id { + *self = Self::Disconnected { dial_record: None }; + return true; + }, + + Self::Opening { .. } | Self::Connected { .. } | Self::Disconnected { .. } => + return false, + }; + + false + } + + /// Returns `true` if the connection should be accepted by the transport manager. + pub fn on_connection_established(&mut self, connection: ConnectionRecord) -> bool { + match self { + // Transform the dial record into a secondary connection. + Self::Connected { + record, + secondary: Some(SecondaryOrDialing::Dialing(dial_record)), + } => + if dial_record.connection_id == connection.connection_id { + *self = Self::Connected { + record: record.clone(), + secondary: Some(SecondaryOrDialing::Secondary(connection)), + }; + + return true; + }, + + // There's place for a secondary connection. + Self::Connected { record, secondary: None } => { + *self = Self::Connected { + record: record.clone(), + secondary: Some(SecondaryOrDialing::Secondary(connection)), + }; + + return true; + }, + + // Convert the dial record into a primary connection or preserve it. + Self::Dialing { dial_record } | + Self::Disconnected { dial_record: Some(dial_record) } => + if dial_record.connection_id == connection.connection_id { + *self = Self::Connected { record: connection.clone(), secondary: None }; + return true; + } else { + *self = Self::Connected { + record: connection, + secondary: Some(SecondaryOrDialing::Dialing(dial_record.clone())), + }; + return true; + }, + + Self::Disconnected { dial_record: None } => { + *self = Self::Connected { record: connection, secondary: None }; + + return true; + }, + + // Accept the incoming connection. + Self::Opening { addresses, connection_id, .. } => { + tracing::trace!( + target: LOG_TARGET, + ?connection, + opening_addresses = ?addresses, + opening_connection_id = ?connection_id, + "Connection established while opening" + ); + + *self = Self::Connected { record: connection, secondary: None }; + + return true; + }, + + _ => {}, + }; + + false + } + + /// Returns `true` if the connection was closed. + pub fn on_connection_closed(&mut self, connection_id: ConnectionId) -> bool { + match self { + Self::Connected { record, secondary } => { + // Primary connection closed. + if record.connection_id == connection_id { + match secondary { + // Promote secondary connection to primary. + Some(SecondaryOrDialing::Secondary(secondary)) => { + *self = Self::Connected { record: secondary.clone(), secondary: None }; + }, + // Preserve the dial record. + Some(SecondaryOrDialing::Dialing(dial_record)) => { + *self = Self::Disconnected { dial_record: Some(dial_record.clone()) }; + + return true; + }, + None => { + *self = Self::Disconnected { dial_record: None }; + + return true; + }, + }; + + return false; + } + + match secondary { + // Secondary connection closed. + Some(SecondaryOrDialing::Secondary(secondary)) + if secondary.connection_id == connection_id => + { + *self = Self::Connected { record: record.clone(), secondary: None }; + }, + _ => (), + } + }, + _ => (), + } + + false + } + + /// Returns `true` if the last transport failed to open. + pub fn on_open_failure(&mut self, transport: SupportedTransport) -> bool { + match self { + Self::Opening { transports, .. } => { + transports.remove(&transport); + + if transports.is_empty() { + *self = Self::Disconnected { dial_record: None }; + return true; + } + + false + }, + _ => false, + } + } + + /// Returns `true` if the connection was opened. + pub fn on_connection_opened(&mut self, record: ConnectionRecord) -> bool { + match self { + Self::Opening { addresses, connection_id, .. } => { + if record.connection_id != *connection_id || !addresses.contains(&record.address) { + tracing::warn!( + target: LOG_TARGET, + ?record, + ?addresses, + ?connection_id, + "Connection opened for unknown address or connection ID", + ); + } + + *self = Self::Dialing { dial_record: record.clone() }; + + true + }, + _ => false, + } + } } /// The connection record keeps track of the connection ID and the address of the connection. @@ -440,507 +397,400 @@ impl PeerState { /// - established inbound connections via `PeerContext::secondary_connection`. #[derive(Debug, Clone, Hash, PartialEq)] pub struct ConnectionRecord { - /// Address of the connection. - /// - /// The address must contain the peer ID extension `/p2p/`. - pub address: Multiaddr, + /// Address of the connection. + /// + /// The address must contain the peer ID extension `/p2p/`. + pub address: Multiaddr, - /// Connection ID resulted from dialing. - pub connection_id: ConnectionId, + /// Connection ID resulted from dialing. + pub connection_id: ConnectionId, } impl ConnectionRecord { - /// Construct a new connection record. - pub fn new(peer: PeerId, address: Multiaddr, connection_id: ConnectionId) -> Self { - Self { - address: Self::ensure_peer_id(peer, address), - connection_id, - } - } - - /// Create a new connection record from the peer ID and the endpoint. - pub fn from_endpoint(peer: PeerId, endpoint: &Endpoint) -> Self { - Self { - address: Self::ensure_peer_id(peer, endpoint.address().clone()), - connection_id: endpoint.connection_id(), - } - } - - /// Ensures the peer ID is present in the address. - fn ensure_peer_id(peer: PeerId, mut address: Multiaddr) -> Multiaddr { - if let Some(Protocol::P2p(multihash)) = address.iter().last() { - if multihash != *peer.as_ref() { - tracing::warn!( - target: LOG_TARGET, - ?address, - ?peer, - "Peer ID mismatch in address", - ); - - address.pop(); - address.push(Protocol::P2p(*peer.as_ref())); - } - - address - } else { - address.with(Protocol::P2p(*peer.as_ref())) - } - } + /// Construct a new connection record. + pub fn new(peer: PeerId, address: Multiaddr, connection_id: ConnectionId) -> Self { + Self { address: Self::ensure_peer_id(peer, address), connection_id } + } + + /// Create a new connection record from the peer ID and the endpoint. + pub fn from_endpoint(peer: PeerId, endpoint: &Endpoint) -> Self { + Self { + address: Self::ensure_peer_id(peer, endpoint.address().clone()), + connection_id: endpoint.connection_id(), + } + } + + /// Ensures the peer ID is present in the address. + fn ensure_peer_id(peer: PeerId, mut address: Multiaddr) -> Multiaddr { + if let Some(Protocol::P2p(multihash)) = address.iter().last() { + if multihash != *peer.as_ref() { + tracing::warn!( + target: LOG_TARGET, + ?address, + ?peer, + "Peer ID mismatch in address", + ); + + address.pop(); + address.push(Protocol::P2p(*peer.as_ref())); + } + + address + } else { + address.with(Protocol::P2p(*peer.as_ref())) + } + } } #[cfg(test)] mod tests { - use super::*; - - #[test] - fn state_can_dial() { - let state = PeerState::Disconnected { dial_record: None }; - assert_eq!(state.can_dial(), StateDialResult::Ok); - - let record = ConnectionRecord::new( - PeerId::random(), - "/ip4/1.1.1.1/tcp/80".parse().unwrap(), - ConnectionId::from(0), - ); - - let state = PeerState::Disconnected { - dial_record: Some(record.clone()), - }; - assert_eq!(state.can_dial(), StateDialResult::DialingInProgress); - - let state = PeerState::Dialing { - dial_record: record.clone(), - }; - assert_eq!(state.can_dial(), StateDialResult::DialingInProgress); - - let state = PeerState::Opening { - addresses: Default::default(), - connection_id: ConnectionId::from(0), - transports: Default::default(), - }; - assert_eq!(state.can_dial(), StateDialResult::DialingInProgress); - - let state = PeerState::Connected { - record, - secondary: None, - }; - assert_eq!(state.can_dial(), StateDialResult::AlreadyConnected); - } - - #[test] - fn state_dial_single_address() { - let record = ConnectionRecord::new( - PeerId::random(), - "/ip4/1.1.1.1/tcp/80".parse().unwrap(), - ConnectionId::from(0), - ); - - let mut state = PeerState::Disconnected { dial_record: None }; - assert_eq!( - state.dial_single_address(record.clone()), - StateDialResult::Ok - ); - assert_eq!( - state, - PeerState::Dialing { - dial_record: record - } - ); - } - - #[test] - fn state_dial_addresses() { - let mut state = PeerState::Disconnected { dial_record: None }; - assert_eq!( - state.dial_addresses( - ConnectionId::from(0), - Default::default(), - Default::default() - ), - StateDialResult::Ok - ); - assert_eq!( - state, - PeerState::Opening { - addresses: Default::default(), - connection_id: ConnectionId::from(0), - transports: Default::default() - } - ); - } - - #[test] - fn check_dial_failure() { - let record = ConnectionRecord::new( - PeerId::random(), - "/ip4/1.1.1.1/tcp/80".parse().unwrap(), - ConnectionId::from(0), - ); - - // Check from the dialing state. - { - let mut state = PeerState::Dialing { - dial_record: record.clone(), - }; - let previous_state = state.clone(); - // Check with different connection ID. - state.on_dial_failure(ConnectionId::from(1)); - assert_eq!(state, previous_state); - - // Check with the same connection ID. - state.on_dial_failure(ConnectionId::from(0)); - assert_eq!(state, PeerState::Disconnected { dial_record: None }); - } - - // Check from the connected state without dialing state. - { - let mut state = PeerState::Connected { - record: record.clone(), - secondary: None, - }; - let previous_state = state.clone(); - // Check with different connection ID. - state.on_dial_failure(ConnectionId::from(1)); - assert_eq!(state, previous_state); - - // Check with the same connection ID. - // The connection ID is checked against dialing records, not established connections. - state.on_dial_failure(ConnectionId::from(0)); - assert_eq!(state, previous_state); - } - - // Check from the connected state with dialing state. - { - let mut state = PeerState::Connected { - record: record.clone(), - secondary: Some(SecondaryOrDialing::Dialing(record.clone())), - }; - let previous_state = state.clone(); - // Check with different connection ID. - state.on_dial_failure(ConnectionId::from(1)); - assert_eq!(state, previous_state); - - // Check with the same connection ID. - // Dial record is cleared. - state.on_dial_failure(ConnectionId::from(0)); - assert_eq!( - state, - PeerState::Connected { - record: record.clone(), - secondary: None, - } - ); - } - - // Check from the disconnected state. - { - let mut state = PeerState::Disconnected { - dial_record: Some(record.clone()), - }; - let previous_state = state.clone(); - // Check with different connection ID. - state.on_dial_failure(ConnectionId::from(1)); - assert_eq!(state, previous_state); - - // Check with the same connection ID. - state.on_dial_failure(ConnectionId::from(0)); - assert_eq!(state, PeerState::Disconnected { dial_record: None }); - } - } - - #[test] - fn check_connection_established() { - let record = ConnectionRecord::new( - PeerId::random(), - "/ip4/1.1.1.1/tcp/80".parse().unwrap(), - ConnectionId::from(0), - ); - let second_record = ConnectionRecord::new( - PeerId::random(), - "/ip4/1.1.1.1/tcp/80".parse().unwrap(), - ConnectionId::from(1), - ); - - // Check from the connected state without secondary connection. - { - let mut state = PeerState::Connected { - record: record.clone(), - secondary: None, - }; - // Secondary is established. - assert!(state.on_connection_established(record.clone())); - assert_eq!( - state, - PeerState::Connected { - record: record.clone(), - secondary: Some(SecondaryOrDialing::Secondary(record.clone())), - } - ); - } - - // Check from the connected state with secondary dialing connection. - { - let mut state = PeerState::Connected { - record: record.clone(), - secondary: Some(SecondaryOrDialing::Dialing(record.clone())), - }; - // Promote the secondary connection. - assert!(state.on_connection_established(record.clone())); - assert_eq!( - state, - PeerState::Connected { - record: record.clone(), - secondary: Some(SecondaryOrDialing::Secondary(record.clone())), - } - ); - } - - // Check from the connected state with secondary established connection. - { - let mut state = PeerState::Connected { - record: record.clone(), - secondary: Some(SecondaryOrDialing::Secondary(record.clone())), - }; - // No state to advance. - assert!(!state.on_connection_established(record.clone())); - } - - // Opening state is completely wiped out. - { - let mut state = PeerState::Opening { - addresses: Default::default(), - connection_id: ConnectionId::from(0), - transports: Default::default(), - }; - assert!(state.on_connection_established(record.clone())); - assert_eq!( - state, - PeerState::Connected { - record: record.clone(), - secondary: None, - } - ); - } - - // Disconnected state with dial record. - { - let mut state = PeerState::Disconnected { - dial_record: Some(record.clone()), - }; - assert!(state.on_connection_established(record.clone())); - assert_eq!( - state, - PeerState::Connected { - record: record.clone(), - secondary: None, - } - ); - } - - // Disconnected with different dial record. - { - let mut state = PeerState::Disconnected { - dial_record: Some(record.clone()), - }; - assert!(state.on_connection_established(second_record.clone())); - assert_eq!( - state, - PeerState::Connected { - record: second_record.clone(), - secondary: Some(SecondaryOrDialing::Dialing(record.clone())) - } - ); - } - - // Disconnected without dial record. - { - let mut state = PeerState::Disconnected { dial_record: None }; - assert!(state.on_connection_established(record.clone())); - assert_eq!( - state, - PeerState::Connected { - record: record.clone(), - secondary: None, - } - ); - } - - // Dialing with different dial record. - { - let mut state = PeerState::Dialing { - dial_record: record.clone(), - }; - assert!(state.on_connection_established(second_record.clone())); - assert_eq!( - state, - PeerState::Connected { - record: second_record.clone(), - secondary: Some(SecondaryOrDialing::Dialing(record.clone())) - } - ); - } - - // Dialing with the same dial record. - { - let mut state = PeerState::Dialing { - dial_record: record.clone(), - }; - assert!(state.on_connection_established(record.clone())); - assert_eq!( - state, - PeerState::Connected { - record: record.clone(), - secondary: None, - } - ); - } - } - - #[test] - fn check_connection_closed() { - let record = ConnectionRecord::new( - PeerId::random(), - "/ip4/1.1.1.1/tcp/80".parse().unwrap(), - ConnectionId::from(0), - ); - let second_record = ConnectionRecord::new( - PeerId::random(), - "/ip4/1.1.1.1/tcp/80".parse().unwrap(), - ConnectionId::from(1), - ); - - // Primary is closed - { - let mut state = PeerState::Connected { - record: record.clone(), - secondary: None, - }; - assert!(state.on_connection_closed(ConnectionId::from(0))); - assert_eq!(state, PeerState::Disconnected { dial_record: None }); - } - - // Primary is closed with secondary promoted - { - let mut state = PeerState::Connected { - record: record.clone(), - secondary: Some(SecondaryOrDialing::Secondary(second_record.clone())), - }; - // Peer is still connected. - assert!(!state.on_connection_closed(ConnectionId::from(0))); - assert_eq!( - state, - PeerState::Connected { - record: second_record.clone(), - secondary: None, - } - ); - } - - // Primary is closed with secondary dial record - { - let mut state = PeerState::Connected { - record: record.clone(), - secondary: Some(SecondaryOrDialing::Dialing(second_record.clone())), - }; - assert!(state.on_connection_closed(ConnectionId::from(0))); - assert_eq!( - state, - PeerState::Disconnected { - dial_record: Some(second_record.clone()) - } - ); - } - } - - #[test] - fn check_open_failure() { - let mut state = PeerState::Opening { - addresses: Default::default(), - connection_id: ConnectionId::from(0), - transports: [SupportedTransport::Tcp].into_iter().collect(), - }; - - // This is the last protocol - assert!(state.on_open_failure(SupportedTransport::Tcp)); - assert_eq!(state, PeerState::Disconnected { dial_record: None }); - } - - #[test] - fn check_open_connection() { - let record = ConnectionRecord::new( - PeerId::random(), - "/ip4/1.1.1.1/tcp/80".parse().unwrap(), - ConnectionId::from(0), - ); - - let mut state = PeerState::Opening { - addresses: Default::default(), - connection_id: ConnectionId::from(0), - transports: [SupportedTransport::Tcp].into_iter().collect(), - }; - - assert!(state.on_connection_opened(record.clone())); - } - - #[test] - fn check_full_lifecycle() { - let record = ConnectionRecord::new( - PeerId::random(), - "/ip4/1.1.1.1/tcp/80".parse().unwrap(), - ConnectionId::from(0), - ); - - let mut state = PeerState::Disconnected { dial_record: None }; - // Dialing. - assert_eq!( - state.dial_single_address(record.clone()), - StateDialResult::Ok - ); - assert_eq!( - state, - PeerState::Dialing { - dial_record: record.clone() - } - ); - - // Dialing failed. - state.on_dial_failure(ConnectionId::from(0)); - assert_eq!(state, PeerState::Disconnected { dial_record: None }); - - // Opening. - assert_eq!( - state.dial_addresses( - ConnectionId::from(0), - Default::default(), - Default::default() - ), - StateDialResult::Ok - ); - - // Open failure. - assert!(state.on_open_failure(SupportedTransport::Tcp)); - assert_eq!(state, PeerState::Disconnected { dial_record: None }); - - // Dial again. - assert_eq!( - state.dial_single_address(record.clone()), - StateDialResult::Ok - ); - assert_eq!( - state, - PeerState::Dialing { - dial_record: record.clone() - } - ); - - // Successful dial. - assert!(state.on_connection_established(record.clone())); - assert_eq!( - state, - PeerState::Connected { - record: record.clone(), - secondary: None - } - ); - } + use super::*; + + #[test] + fn state_can_dial() { + let state = PeerState::Disconnected { dial_record: None }; + assert_eq!(state.can_dial(), StateDialResult::Ok); + + let record = ConnectionRecord::new( + PeerId::random(), + "/ip4/1.1.1.1/tcp/80".parse().unwrap(), + ConnectionId::from(0), + ); + + let state = PeerState::Disconnected { dial_record: Some(record.clone()) }; + assert_eq!(state.can_dial(), StateDialResult::DialingInProgress); + + let state = PeerState::Dialing { dial_record: record.clone() }; + assert_eq!(state.can_dial(), StateDialResult::DialingInProgress); + + let state = PeerState::Opening { + addresses: Default::default(), + connection_id: ConnectionId::from(0), + transports: Default::default(), + }; + assert_eq!(state.can_dial(), StateDialResult::DialingInProgress); + + let state = PeerState::Connected { record, secondary: None }; + assert_eq!(state.can_dial(), StateDialResult::AlreadyConnected); + } + + #[test] + fn state_dial_single_address() { + let record = ConnectionRecord::new( + PeerId::random(), + "/ip4/1.1.1.1/tcp/80".parse().unwrap(), + ConnectionId::from(0), + ); + + let mut state = PeerState::Disconnected { dial_record: None }; + assert_eq!(state.dial_single_address(record.clone()), StateDialResult::Ok); + assert_eq!(state, PeerState::Dialing { dial_record: record }); + } + + #[test] + fn state_dial_addresses() { + let mut state = PeerState::Disconnected { dial_record: None }; + assert_eq!( + state.dial_addresses(ConnectionId::from(0), Default::default(), Default::default()), + StateDialResult::Ok + ); + assert_eq!( + state, + PeerState::Opening { + addresses: Default::default(), + connection_id: ConnectionId::from(0), + transports: Default::default() + } + ); + } + + #[test] + fn check_dial_failure() { + let record = ConnectionRecord::new( + PeerId::random(), + "/ip4/1.1.1.1/tcp/80".parse().unwrap(), + ConnectionId::from(0), + ); + + // Check from the dialing state. + { + let mut state = PeerState::Dialing { dial_record: record.clone() }; + let previous_state = state.clone(); + // Check with different connection ID. + state.on_dial_failure(ConnectionId::from(1)); + assert_eq!(state, previous_state); + + // Check with the same connection ID. + state.on_dial_failure(ConnectionId::from(0)); + assert_eq!(state, PeerState::Disconnected { dial_record: None }); + } + + // Check from the connected state without dialing state. + { + let mut state = PeerState::Connected { record: record.clone(), secondary: None }; + let previous_state = state.clone(); + // Check with different connection ID. + state.on_dial_failure(ConnectionId::from(1)); + assert_eq!(state, previous_state); + + // Check with the same connection ID. + // The connection ID is checked against dialing records, not established connections. + state.on_dial_failure(ConnectionId::from(0)); + assert_eq!(state, previous_state); + } + + // Check from the connected state with dialing state. + { + let mut state = PeerState::Connected { + record: record.clone(), + secondary: Some(SecondaryOrDialing::Dialing(record.clone())), + }; + let previous_state = state.clone(); + // Check with different connection ID. + state.on_dial_failure(ConnectionId::from(1)); + assert_eq!(state, previous_state); + + // Check with the same connection ID. + // Dial record is cleared. + state.on_dial_failure(ConnectionId::from(0)); + assert_eq!(state, PeerState::Connected { record: record.clone(), secondary: None }); + } + + // Check from the disconnected state. + { + let mut state = PeerState::Disconnected { dial_record: Some(record.clone()) }; + let previous_state = state.clone(); + // Check with different connection ID. + state.on_dial_failure(ConnectionId::from(1)); + assert_eq!(state, previous_state); + + // Check with the same connection ID. + state.on_dial_failure(ConnectionId::from(0)); + assert_eq!(state, PeerState::Disconnected { dial_record: None }); + } + } + + #[test] + fn check_connection_established() { + let record = ConnectionRecord::new( + PeerId::random(), + "/ip4/1.1.1.1/tcp/80".parse().unwrap(), + ConnectionId::from(0), + ); + let second_record = ConnectionRecord::new( + PeerId::random(), + "/ip4/1.1.1.1/tcp/80".parse().unwrap(), + ConnectionId::from(1), + ); + + // Check from the connected state without secondary connection. + { + let mut state = PeerState::Connected { record: record.clone(), secondary: None }; + // Secondary is established. + assert!(state.on_connection_established(record.clone())); + assert_eq!( + state, + PeerState::Connected { + record: record.clone(), + secondary: Some(SecondaryOrDialing::Secondary(record.clone())), + } + ); + } + + // Check from the connected state with secondary dialing connection. + { + let mut state = PeerState::Connected { + record: record.clone(), + secondary: Some(SecondaryOrDialing::Dialing(record.clone())), + }; + // Promote the secondary connection. + assert!(state.on_connection_established(record.clone())); + assert_eq!( + state, + PeerState::Connected { + record: record.clone(), + secondary: Some(SecondaryOrDialing::Secondary(record.clone())), + } + ); + } + + // Check from the connected state with secondary established connection. + { + let mut state = PeerState::Connected { + record: record.clone(), + secondary: Some(SecondaryOrDialing::Secondary(record.clone())), + }; + // No state to advance. + assert!(!state.on_connection_established(record.clone())); + } + + // Opening state is completely wiped out. + { + let mut state = PeerState::Opening { + addresses: Default::default(), + connection_id: ConnectionId::from(0), + transports: Default::default(), + }; + assert!(state.on_connection_established(record.clone())); + assert_eq!(state, PeerState::Connected { record: record.clone(), secondary: None }); + } + + // Disconnected state with dial record. + { + let mut state = PeerState::Disconnected { dial_record: Some(record.clone()) }; + assert!(state.on_connection_established(record.clone())); + assert_eq!(state, PeerState::Connected { record: record.clone(), secondary: None }); + } + + // Disconnected with different dial record. + { + let mut state = PeerState::Disconnected { dial_record: Some(record.clone()) }; + assert!(state.on_connection_established(second_record.clone())); + assert_eq!( + state, + PeerState::Connected { + record: second_record.clone(), + secondary: Some(SecondaryOrDialing::Dialing(record.clone())) + } + ); + } + + // Disconnected without dial record. + { + let mut state = PeerState::Disconnected { dial_record: None }; + assert!(state.on_connection_established(record.clone())); + assert_eq!(state, PeerState::Connected { record: record.clone(), secondary: None }); + } + + // Dialing with different dial record. + { + let mut state = PeerState::Dialing { dial_record: record.clone() }; + assert!(state.on_connection_established(second_record.clone())); + assert_eq!( + state, + PeerState::Connected { + record: second_record.clone(), + secondary: Some(SecondaryOrDialing::Dialing(record.clone())) + } + ); + } + + // Dialing with the same dial record. + { + let mut state = PeerState::Dialing { dial_record: record.clone() }; + assert!(state.on_connection_established(record.clone())); + assert_eq!(state, PeerState::Connected { record: record.clone(), secondary: None }); + } + } + + #[test] + fn check_connection_closed() { + let record = ConnectionRecord::new( + PeerId::random(), + "/ip4/1.1.1.1/tcp/80".parse().unwrap(), + ConnectionId::from(0), + ); + let second_record = ConnectionRecord::new( + PeerId::random(), + "/ip4/1.1.1.1/tcp/80".parse().unwrap(), + ConnectionId::from(1), + ); + + // Primary is closed + { + let mut state = PeerState::Connected { record: record.clone(), secondary: None }; + assert!(state.on_connection_closed(ConnectionId::from(0))); + assert_eq!(state, PeerState::Disconnected { dial_record: None }); + } + + // Primary is closed with secondary promoted + { + let mut state = PeerState::Connected { + record: record.clone(), + secondary: Some(SecondaryOrDialing::Secondary(second_record.clone())), + }; + // Peer is still connected. + assert!(!state.on_connection_closed(ConnectionId::from(0))); + assert_eq!( + state, + PeerState::Connected { record: second_record.clone(), secondary: None } + ); + } + + // Primary is closed with secondary dial record + { + let mut state = PeerState::Connected { + record: record.clone(), + secondary: Some(SecondaryOrDialing::Dialing(second_record.clone())), + }; + assert!(state.on_connection_closed(ConnectionId::from(0))); + assert_eq!(state, PeerState::Disconnected { dial_record: Some(second_record.clone()) }); + } + } + + #[test] + fn check_open_failure() { + let mut state = PeerState::Opening { + addresses: Default::default(), + connection_id: ConnectionId::from(0), + transports: [SupportedTransport::Tcp].into_iter().collect(), + }; + + // This is the last protocol + assert!(state.on_open_failure(SupportedTransport::Tcp)); + assert_eq!(state, PeerState::Disconnected { dial_record: None }); + } + + #[test] + fn check_open_connection() { + let record = ConnectionRecord::new( + PeerId::random(), + "/ip4/1.1.1.1/tcp/80".parse().unwrap(), + ConnectionId::from(0), + ); + + let mut state = PeerState::Opening { + addresses: Default::default(), + connection_id: ConnectionId::from(0), + transports: [SupportedTransport::Tcp].into_iter().collect(), + }; + + assert!(state.on_connection_opened(record.clone())); + } + + #[test] + fn check_full_lifecycle() { + let record = ConnectionRecord::new( + PeerId::random(), + "/ip4/1.1.1.1/tcp/80".parse().unwrap(), + ConnectionId::from(0), + ); + + let mut state = PeerState::Disconnected { dial_record: None }; + // Dialing. + assert_eq!(state.dial_single_address(record.clone()), StateDialResult::Ok); + assert_eq!(state, PeerState::Dialing { dial_record: record.clone() }); + + // Dialing failed. + state.on_dial_failure(ConnectionId::from(0)); + assert_eq!(state, PeerState::Disconnected { dial_record: None }); + + // Opening. + assert_eq!( + state.dial_addresses(ConnectionId::from(0), Default::default(), Default::default()), + StateDialResult::Ok + ); + + // Open failure. + assert!(state.on_open_failure(SupportedTransport::Tcp)); + assert_eq!(state, PeerState::Disconnected { dial_record: None }); + + // Dial again. + assert_eq!(state.dial_single_address(record.clone()), StateDialResult::Ok); + assert_eq!(state, PeerState::Dialing { dial_record: record.clone() }); + + // Successful dial. + assert!(state.on_connection_established(record.clone())); + assert_eq!(state, PeerState::Connected { record: record.clone(), secondary: None }); + } } diff --git a/client/litep2p/src/transport/manager/types.rs b/client/litep2p/src/transport/manager/types.rs index 15eb2c50..4d578c2d 100644 --- a/client/litep2p/src/transport/manager/types.rs +++ b/client/litep2p/src/transport/manager/types.rs @@ -23,37 +23,37 @@ use crate::transport::manager::{address::AddressStore, peer_state::PeerState}; /// Supported protocols. #[derive(Debug, Copy, Clone, Hash, PartialEq, Eq)] pub enum SupportedTransport { - /// TCP. - Tcp, + /// TCP. + Tcp, - /// QUIC. - #[cfg(feature = "quic")] - Quic, + /// QUIC. + #[cfg(feature = "quic")] + Quic, - /// WebRTC - #[cfg(feature = "webrtc")] - WebRtc, + /// WebRTC + #[cfg(feature = "webrtc")] + WebRtc, - /// WebSocket - #[cfg(feature = "websocket")] - WebSocket, + /// WebSocket + #[cfg(feature = "websocket")] + WebSocket, } /// Peer context. #[derive(Debug)] pub struct PeerContext { - /// Peer state. - pub state: PeerState, + /// Peer state. + pub state: PeerState, - /// Known addresses of peer. - pub addresses: AddressStore, + /// Known addresses of peer. + pub addresses: AddressStore, } impl Default for PeerContext { - fn default() -> Self { - Self { - state: PeerState::Disconnected { dial_record: None }, - addresses: AddressStore::new(), - } - } + fn default() -> Self { + Self { + state: PeerState::Disconnected { dial_record: None }, + addresses: AddressStore::new(), + } + } } diff --git a/client/litep2p/src/transport/mod.rs b/client/litep2p/src/transport/mod.rs index c7c8726e..eb695d04 100644 --- a/client/litep2p/src/transport/mod.rs +++ b/client/litep2p/src/transport/mod.rs @@ -66,172 +66,166 @@ pub(crate) const DIAL_DEADLINE_MULTIPLIER: u32 = 2; /// Connection endpoint. #[derive(Debug, Clone, PartialEq, Eq)] pub enum Endpoint { - /// Successfully established outbound connection. - Dialer { - /// Address that was dialed. - address: Multiaddr, - - /// Connection ID. - connection_id: ConnectionId, - }, - - /// Successfully established inbound connection. - Listener { - /// Local connection address. - address: Multiaddr, - - /// Connection ID. - connection_id: ConnectionId, - }, + /// Successfully established outbound connection. + Dialer { + /// Address that was dialed. + address: Multiaddr, + + /// Connection ID. + connection_id: ConnectionId, + }, + + /// Successfully established inbound connection. + Listener { + /// Local connection address. + address: Multiaddr, + + /// Connection ID. + connection_id: ConnectionId, + }, } impl Endpoint { - /// Get `Multiaddr` of the [`Endpoint`]. - pub fn address(&self) -> &Multiaddr { - match self { - Self::Dialer { address, .. } => address, - Self::Listener { address, .. } => address, - } - } - - /// Crate dialer. - pub(crate) fn dialer(address: Multiaddr, connection_id: ConnectionId) -> Self { - Endpoint::Dialer { - address, - connection_id, - } - } - - /// Create listener. - pub(crate) fn listener(address: Multiaddr, connection_id: ConnectionId) -> Self { - Endpoint::Listener { - address, - connection_id, - } - } - - /// Get `ConnectionId` of the `Endpoint`. - pub fn connection_id(&self) -> ConnectionId { - match self { - Self::Dialer { connection_id, .. } => *connection_id, - Self::Listener { connection_id, .. } => *connection_id, - } - } - - /// Is this a listener endpoint? - pub fn is_listener(&self) -> bool { - std::matches!(self, Self::Listener { .. }) - } + /// Get `Multiaddr` of the [`Endpoint`]. + pub fn address(&self) -> &Multiaddr { + match self { + Self::Dialer { address, .. } => address, + Self::Listener { address, .. } => address, + } + } + + /// Crate dialer. + pub(crate) fn dialer(address: Multiaddr, connection_id: ConnectionId) -> Self { + Endpoint::Dialer { address, connection_id } + } + + /// Create listener. + pub(crate) fn listener(address: Multiaddr, connection_id: ConnectionId) -> Self { + Endpoint::Listener { address, connection_id } + } + + /// Get `ConnectionId` of the `Endpoint`. + pub fn connection_id(&self) -> ConnectionId { + match self { + Self::Dialer { connection_id, .. } => *connection_id, + Self::Listener { connection_id, .. } => *connection_id, + } + } + + /// Is this a listener endpoint? + pub fn is_listener(&self) -> bool { + std::matches!(self, Self::Listener { .. }) + } } /// Transport event. #[derive(Debug)] pub(crate) enum TransportEvent { - /// Fully negotiated connection established to remote peer. - ConnectionEstablished { - /// Peer ID. - peer: PeerId, - - /// Endpoint. - endpoint: Endpoint, - }, - - PendingInboundConnection { - /// Connection ID. - connection_id: ConnectionId, - }, - - /// Connection opened to remote but not yet negotiated. - ConnectionOpened { - /// Connection ID. - connection_id: ConnectionId, - - /// Address that was dialed. - address: Multiaddr, - - /// Errors from unsuccessful dial attempts. - errors: Vec<(Multiaddr, DialError)>, - }, - - /// Connection closed to remote peer. - #[allow(unused)] - ConnectionClosed { - /// Peer ID. - peer: PeerId, - - /// Connection ID. - connection_id: ConnectionId, - }, - - /// Failed to dial remote peer. - DialFailure { - /// Connection ID. - connection_id: ConnectionId, - - /// Dialed address. - address: Multiaddr, - - /// Error. - error: DialError, - }, - - /// Open failure for an unnegotiated set of connections. - OpenFailure { - /// Connection ID. - connection_id: ConnectionId, - - /// Errors. - errors: Vec<(Multiaddr, DialError)>, - }, + /// Fully negotiated connection established to remote peer. + ConnectionEstablished { + /// Peer ID. + peer: PeerId, + + /// Endpoint. + endpoint: Endpoint, + }, + + PendingInboundConnection { + /// Connection ID. + connection_id: ConnectionId, + }, + + /// Connection opened to remote but not yet negotiated. + ConnectionOpened { + /// Connection ID. + connection_id: ConnectionId, + + /// Address that was dialed. + address: Multiaddr, + + /// Errors from unsuccessful dial attempts. + errors: Vec<(Multiaddr, DialError)>, + }, + + /// Connection closed to remote peer. + #[allow(unused)] + ConnectionClosed { + /// Peer ID. + peer: PeerId, + + /// Connection ID. + connection_id: ConnectionId, + }, + + /// Failed to dial remote peer. + DialFailure { + /// Connection ID. + connection_id: ConnectionId, + + /// Dialed address. + address: Multiaddr, + + /// Error. + error: DialError, + }, + + /// Open failure for an unnegotiated set of connections. + OpenFailure { + /// Connection ID. + connection_id: ConnectionId, + + /// Errors. + errors: Vec<(Multiaddr, DialError)>, + }, } pub(crate) trait TransportBuilder { - type Config: Debug; - type Transport: Transport; - - /// Create new [`Transport`] object. - fn new( - context: TransportHandle, - config: Self::Config, - resolver: Arc, - ) -> crate::Result<(Self, Vec)> - where - Self: Sized; + type Config: Debug; + type Transport: Transport; + + /// Create new [`Transport`] object. + fn new( + context: TransportHandle, + config: Self::Config, + resolver: Arc, + ) -> crate::Result<(Self, Vec)> + where + Self: Sized; } pub(crate) trait Transport: Stream + Unpin + Send { - /// Dial `address` and negotiate connection. - fn dial(&mut self, connection_id: ConnectionId, address: Multiaddr) -> crate::Result<()>; - - /// Accept negotiated connection. - /// - /// Returns a future that completes when the connection has been fully established - /// and all installed protocols have been notified via their event channels. - /// This ensures that by the time the caller receives a ConnectionEstablished event, - /// protocols are ready to handle substream operations. - fn accept( - &mut self, - connection_id: ConnectionId, - ) -> crate::Result>>; - - /// Accept pending connection. - fn accept_pending(&mut self, connection_id: ConnectionId) -> crate::Result<()>; - - /// Reject pending connection. - fn reject_pending(&mut self, connection_id: ConnectionId) -> crate::Result<()>; - - /// Reject negotiated connection. - fn reject(&mut self, connection_id: ConnectionId) -> crate::Result<()>; - - /// Attempt to open connection to remote peer over one or more addresses. - fn open(&mut self, connection_id: ConnectionId, addresses: Vec) - -> crate::Result<()>; - - /// Negotiate opened connection. - fn negotiate(&mut self, connection_id: ConnectionId) -> crate::Result<()>; - - /// Cancel opening connections. - /// - /// This is a no-op for connections that have already succeeded/canceled. - fn cancel(&mut self, connection_id: ConnectionId); + /// Dial `address` and negotiate connection. + fn dial(&mut self, connection_id: ConnectionId, address: Multiaddr) -> crate::Result<()>; + + /// Accept negotiated connection. + /// + /// Returns a future that completes when the connection has been fully established + /// and all installed protocols have been notified via their event channels. + /// This ensures that by the time the caller receives a ConnectionEstablished event, + /// protocols are ready to handle substream operations. + fn accept( + &mut self, + connection_id: ConnectionId, + ) -> crate::Result>>; + + /// Accept pending connection. + fn accept_pending(&mut self, connection_id: ConnectionId) -> crate::Result<()>; + + /// Reject pending connection. + fn reject_pending(&mut self, connection_id: ConnectionId) -> crate::Result<()>; + + /// Reject negotiated connection. + fn reject(&mut self, connection_id: ConnectionId) -> crate::Result<()>; + + /// Attempt to open connection to remote peer over one or more addresses. + fn open(&mut self, connection_id: ConnectionId, addresses: Vec) + -> crate::Result<()>; + + /// Negotiate opened connection. + fn negotiate(&mut self, connection_id: ConnectionId) -> crate::Result<()>; + + /// Cancel opening connections. + /// + /// This is a no-op for connections that have already succeeded/canceled. + fn cancel(&mut self, connection_id: ConnectionId); } diff --git a/client/litep2p/src/transport/quic/config.rs b/client/litep2p/src/transport/quic/config.rs index 8ed30fce..98fe1dd7 100644 --- a/client/litep2p/src/transport/quic/config.rs +++ b/client/litep2p/src/transport/quic/config.rs @@ -29,30 +29,30 @@ use std::time::Duration; /// QUIC transport configuration. #[derive(Debug)] pub struct Config { - /// Listen address for the transport. - /// - /// Default listen addres is `/ip4/127.0.0.1/udp/0/quic-v1`. - pub listen_addresses: Vec, - - /// Connection open timeout. - /// - /// How long should litep2p wait for a connection to be opend before the host - /// is deemed unreachable. - pub connection_open_timeout: Duration, - - /// Substream open timeout. - /// - /// How long should litep2p wait for a substream to be opened before considering - /// the substream rejected. - pub substream_open_timeout: Duration, + /// Listen address for the transport. + /// + /// Default listen addres is `/ip4/127.0.0.1/udp/0/quic-v1`. + pub listen_addresses: Vec, + + /// Connection open timeout. + /// + /// How long should litep2p wait for a connection to be opend before the host + /// is deemed unreachable. + pub connection_open_timeout: Duration, + + /// Substream open timeout. + /// + /// How long should litep2p wait for a substream to be opened before considering + /// the substream rejected. + pub substream_open_timeout: Duration, } impl Default for Config { - fn default() -> Self { - Self { - listen_addresses: vec!["/ip4/127.0.0.1/udp/0/quic-v1".parse().expect("valid address")], - connection_open_timeout: CONNECTION_OPEN_TIMEOUT, - substream_open_timeout: SUBSTREAM_OPEN_TIMEOUT, - } - } + fn default() -> Self { + Self { + listen_addresses: vec!["/ip4/127.0.0.1/udp/0/quic-v1".parse().expect("valid address")], + connection_open_timeout: CONNECTION_OPEN_TIMEOUT, + substream_open_timeout: SUBSTREAM_OPEN_TIMEOUT, + } + } } diff --git a/client/litep2p/src/transport/quic/connection.rs b/client/litep2p/src/transport/quic/connection.rs index 2d91cac3..d4cb69ff 100644 --- a/client/litep2p/src/transport/quic/connection.rs +++ b/client/litep2p/src/transport/quic/connection.rs @@ -23,17 +23,17 @@ use std::{collections::HashMap, time::Duration}; use crate::{ - config::Role, - error::{Error, NegotiationError, SubstreamError}, - multistream_select::{dialer_select_proto, listener_select_proto, Negotiated, Version}, - protocol::{Direction, Permit, ProtocolCommand, ProtocolSet, SubstreamKeepAlive}, - substream, - transport::{ - quic::substream::{NegotiatingSubstream, Substream}, - Endpoint, - }, - types::{protocol::ProtocolName, SubstreamId}, - BandwidthSink, PeerId, + config::Role, + error::{Error, NegotiationError, SubstreamError}, + multistream_select::{dialer_select_proto, listener_select_proto, Negotiated, Version}, + protocol::{Direction, Permit, ProtocolCommand, ProtocolSet, SubstreamKeepAlive}, + substream, + transport::{ + quic::substream::{NegotiatingSubstream, Substream}, + Endpoint, + }, + types::{protocol::ProtocolName, SubstreamId}, + BandwidthSink, PeerId, }; use futures::{future::BoxFuture, stream::FuturesUnordered, AsyncRead, AsyncWrite, StreamExt}; @@ -45,365 +45,365 @@ const LOG_TARGET: &str = "litep2p::quic::connection"; /// QUIC connection error. #[derive(Debug)] enum ConnectionError { - /// Timeout - Timeout { - /// Protocol. - protocol: Option, - - /// Substream ID. - substream_id: Option, - }, - - /// Failed to negotiate connection/substream. - FailedToNegotiate { - /// Protocol. - protocol: Option, - - /// Substream ID. - substream_id: Option, - - /// Error. - error: SubstreamError, - }, + /// Timeout + Timeout { + /// Protocol. + protocol: Option, + + /// Substream ID. + substream_id: Option, + }, + + /// Failed to negotiate connection/substream. + FailedToNegotiate { + /// Protocol. + protocol: Option, + + /// Substream ID. + substream_id: Option, + + /// Error. + error: SubstreamError, + }, } struct NegotiatedSubstream { - /// Substream direction. - direction: Direction, + /// Substream direction. + direction: Direction, - /// Substream ID. - substream_id: SubstreamId, + /// Substream ID. + substream_id: SubstreamId, - /// Protocol name. - protocol: ProtocolName, + /// Protocol name. + protocol: ProtocolName, - /// Substream used to send data. - sender: SendStream, + /// Substream used to send data. + sender: SendStream, - /// Substream used to receive data. - receiver: RecvStream, + /// Substream used to receive data. + receiver: RecvStream, - /// Permit. - permit: Permit, + /// Permit. + permit: Permit, - /// Whether this substream should keep connection alive while it exists. - keep_alive: SubstreamKeepAlive, + /// Whether this substream should keep connection alive while it exists. + keep_alive: SubstreamKeepAlive, } /// QUIC connection. pub struct QuicConnection { - /// Remote peer ID. - peer: PeerId, + /// Remote peer ID. + peer: PeerId, - /// Endpoint. - endpoint: Endpoint, + /// Endpoint. + endpoint: Endpoint, - /// Substream open timeout. - substream_open_timeout: Duration, + /// Substream open timeout. + substream_open_timeout: Duration, - /// QUIC connection. - connection: QuinnConnection, + /// QUIC connection. + connection: QuinnConnection, - /// Protocol set. - protocol_set: ProtocolSet, + /// Protocol set. + protocol_set: ProtocolSet, - /// Bandwidth sink. - bandwidth_sink: BandwidthSink, + /// Bandwidth sink. + bandwidth_sink: BandwidthSink, - /// Pending substreams. - pending_substreams: - FuturesUnordered>>, + /// Pending substreams. + pending_substreams: + FuturesUnordered>>, } impl QuicConnection { - /// Creates a new [`QuicConnection`]. - pub fn new( - peer: PeerId, - endpoint: Endpoint, - connection: QuinnConnection, - protocol_set: ProtocolSet, - bandwidth_sink: BandwidthSink, - substream_open_timeout: Duration, - ) -> Self { - Self { - peer, - endpoint, - connection, - protocol_set, - bandwidth_sink, - substream_open_timeout, - pending_substreams: FuturesUnordered::new(), - } - } - - /// Negotiate protocol. - async fn negotiate_protocol( - stream: S, - role: &Role, - protocols: Vec<&str>, - ) -> Result<(Negotiated, ProtocolName), NegotiationError> { - tracing::trace!(target: LOG_TARGET, ?protocols, "negotiating protocols"); - - let (protocol, socket) = match role { - Role::Dialer => dialer_select_proto(stream, protocols, Version::V1).await, - Role::Listener => listener_select_proto(stream, protocols).await, - } - .map_err(NegotiationError::MultistreamSelectError)?; - - tracing::trace!(target: LOG_TARGET, ?protocol, "protocol negotiated"); - - Ok((socket, ProtocolName::from(protocol.to_string()))) - } - - /// Open substream for `protocol`. - async fn open_substream( - handle: QuinnConnection, - permit: Permit, - substream_id: SubstreamId, - protocol: ProtocolName, - fallback_names: Vec, - keep_alive: SubstreamKeepAlive, - ) -> Result { - tracing::debug!(target: LOG_TARGET, ?protocol, ?substream_id, "open substream"); - - let stream = match handle.open_bi().await { - Ok((send_stream, recv_stream)) => NegotiatingSubstream::new(send_stream, recv_stream), - Err(error) => return Err(NegotiationError::Quic(error.into()).into()), - }; - - // TODO: https://github.com/paritytech/litep2p/issues/346 protocols don't change after - // they've been initialized so this should be done only once - let protocols = std::iter::once(&*protocol) - .chain(fallback_names.iter().map(|protocol| &**protocol)) - .collect(); - - let (io, protocol) = Self::negotiate_protocol(stream, &Role::Dialer, protocols).await?; - - tracing::trace!( - target: LOG_TARGET, - ?protocol, - ?substream_id, - "substream accepted and negotiated" - ); - - let stream = io.inner(); - let (sender, receiver) = stream.into_parts(); - - Ok(NegotiatedSubstream { - sender, - receiver, - substream_id, - direction: Direction::Outbound(substream_id), - permit, - protocol, - keep_alive, - }) - } - - /// Accept bidirectional substream from rmeote peer. - async fn accept_substream( - stream: NegotiatingSubstream, - protocols: HashMap, - substream_id: SubstreamId, - permit: Permit, - ) -> Result { - tracing::trace!( - target: LOG_TARGET, - ?substream_id, - "accept inbound substream" - ); - - let protocol_names = protocols.keys().map(|protocol| &**protocol).collect::>(); - let (io, protocol) = - Self::negotiate_protocol(stream, &Role::Listener, protocol_names).await?; - let keep_alive = *protocols.get(&protocol).expect("protocol to be one of the keys"); - - tracing::trace!( - target: LOG_TARGET, - ?substream_id, - ?protocol, - "substream accepted and negotiated" - ); - - let stream = io.inner(); - let (sender, receiver) = stream.into_parts(); - - Ok(NegotiatedSubstream { - permit, - sender, - receiver, - protocol, - substream_id, - direction: Direction::Inbound, - keep_alive, - }) - } - - /// Start the connection event loop without notifying protocols. - /// This is used when protocols have already been notified during accept(). - pub(crate) async fn start(mut self) -> crate::Result<()> { - loop { - tokio::select! { - event = self.connection.accept_bi() => match event { - Ok((send_stream, receive_stream)) => { - - let substream = self.protocol_set.next_substream_id(); - let protocols = self.protocol_set.protocols_with_keep_alives(); - let permit = self.protocol_set.try_get_permit().ok_or(Error::ConnectionClosed)?; - let stream = NegotiatingSubstream::new(send_stream, receive_stream); - let substream_open_timeout = self.substream_open_timeout; - - self.pending_substreams.push(Box::pin(async move { - match tokio::time::timeout( - substream_open_timeout, - Self::accept_substream(stream, protocols, substream, permit), - ) - .await - { - Ok(Ok(substream)) => Ok(substream), - Ok(Err(error)) => Err(ConnectionError::FailedToNegotiate { - protocol: None, - substream_id: None, - error: SubstreamError::NegotiationError(error), - }), - Err(_) => Err(ConnectionError::Timeout { - protocol: None, - substream_id: None - }), - } - })); - } - Err(error) => { - tracing::debug!(target: LOG_TARGET, peer = ?self.peer, ?error, "failed to accept substream"); - return self.protocol_set.report_connection_closed(self.peer, self.endpoint.connection_id()).await; - } - }, - substream = self.pending_substreams.select_next_some(), if !self.pending_substreams.is_empty() => { - match substream { - Err(error) => { - tracing::debug!( - target: LOG_TARGET, - ?error, - "failed to accept/open substream", - ); - - let (protocol, substream_id, error) = match error { - ConnectionError::Timeout { protocol, substream_id } => { - (protocol, substream_id, SubstreamError::NegotiationError(NegotiationError::Timeout)) - } - ConnectionError::FailedToNegotiate { protocol, substream_id, error } => { - (protocol, substream_id, error) - } - }; - - if let (Some(protocol), Some(substream_id)) = (protocol, substream_id) { - self.protocol_set - .report_substream_open_failure(protocol, substream_id, error) - .await?; - } - } - Ok(substream) => { - let protocol = substream.protocol.clone(); - let substream_id = substream.substream_id; - let direction = substream.direction; - let bandwidth_sink = self.bandwidth_sink.clone(); - let opening_permit = substream.permit; - let lifetime_permit = - substream.keep_alive.then(|| opening_permit.clone()); - - let substream = substream::Substream::new_quic( - self.peer, - substream_id, - Substream::new( - lifetime_permit, - substream.sender, - substream.receiver, - bandwidth_sink - ), - self.protocol_set.protocol_codec(&protocol) - ); - - self.protocol_set.report_substream_open( - self.peer, - protocol, - direction, - substream, - opening_permit, - ).await?; - } - } - } - command = self.protocol_set.next() => match command { - None => { - tracing::debug!( - target: LOG_TARGET, - peer = ?self.peer, - connection_id = ?self.endpoint.connection_id(), - "protocols have dropped connection" - ); - return self.protocol_set.report_connection_closed( - self.peer, - self.endpoint.connection_id(), - ).await; - } - Some(ProtocolCommand::OpenSubstream { - protocol, - fallback_names, - substream_id, - permit, - keep_alive, - connection_id: _, - }) => { - let connection = self.connection.clone(); - let substream_open_timeout = self.substream_open_timeout; - - tracing::trace!( - target: LOG_TARGET, - ?protocol, - ?fallback_names, - ?substream_id, - "open substream" - ); - - self.pending_substreams.push(Box::pin(async move { - match tokio::time::timeout( - substream_open_timeout, - Self::open_substream( - connection, - permit, - substream_id, - protocol.clone(), - fallback_names, - keep_alive, - ), - ) - .await - { - Ok(Ok(substream)) => Ok(substream), - Ok(Err(error)) => Err(ConnectionError::FailedToNegotiate { - protocol: Some(protocol), - substream_id: Some(substream_id), - error, - }), - Err(_) => Err(ConnectionError::Timeout { - protocol: None, - substream_id: None - }), - } - })); - } - Some(ProtocolCommand::ForceClose) => { - tracing::debug!( - target: LOG_TARGET, - peer = ?self.peer, - connection_id = ?self.endpoint.connection_id(), - "force closing connection", - ); - - return self.protocol_set.report_connection_closed(self.peer, self.endpoint.connection_id()).await; - } - } - } - } - } + /// Creates a new [`QuicConnection`]. + pub fn new( + peer: PeerId, + endpoint: Endpoint, + connection: QuinnConnection, + protocol_set: ProtocolSet, + bandwidth_sink: BandwidthSink, + substream_open_timeout: Duration, + ) -> Self { + Self { + peer, + endpoint, + connection, + protocol_set, + bandwidth_sink, + substream_open_timeout, + pending_substreams: FuturesUnordered::new(), + } + } + + /// Negotiate protocol. + async fn negotiate_protocol( + stream: S, + role: &Role, + protocols: Vec<&str>, + ) -> Result<(Negotiated, ProtocolName), NegotiationError> { + tracing::trace!(target: LOG_TARGET, ?protocols, "negotiating protocols"); + + let (protocol, socket) = match role { + Role::Dialer => dialer_select_proto(stream, protocols, Version::V1).await, + Role::Listener => listener_select_proto(stream, protocols).await, + } + .map_err(NegotiationError::MultistreamSelectError)?; + + tracing::trace!(target: LOG_TARGET, ?protocol, "protocol negotiated"); + + Ok((socket, ProtocolName::from(protocol.to_string()))) + } + + /// Open substream for `protocol`. + async fn open_substream( + handle: QuinnConnection, + permit: Permit, + substream_id: SubstreamId, + protocol: ProtocolName, + fallback_names: Vec, + keep_alive: SubstreamKeepAlive, + ) -> Result { + tracing::debug!(target: LOG_TARGET, ?protocol, ?substream_id, "open substream"); + + let stream = match handle.open_bi().await { + Ok((send_stream, recv_stream)) => NegotiatingSubstream::new(send_stream, recv_stream), + Err(error) => return Err(NegotiationError::Quic(error.into()).into()), + }; + + // TODO: https://github.com/paritytech/litep2p/issues/346 protocols don't change after + // they've been initialized so this should be done only once + let protocols = std::iter::once(&*protocol) + .chain(fallback_names.iter().map(|protocol| &**protocol)) + .collect(); + + let (io, protocol) = Self::negotiate_protocol(stream, &Role::Dialer, protocols).await?; + + tracing::trace!( + target: LOG_TARGET, + ?protocol, + ?substream_id, + "substream accepted and negotiated" + ); + + let stream = io.inner(); + let (sender, receiver) = stream.into_parts(); + + Ok(NegotiatedSubstream { + sender, + receiver, + substream_id, + direction: Direction::Outbound(substream_id), + permit, + protocol, + keep_alive, + }) + } + + /// Accept bidirectional substream from rmeote peer. + async fn accept_substream( + stream: NegotiatingSubstream, + protocols: HashMap, + substream_id: SubstreamId, + permit: Permit, + ) -> Result { + tracing::trace!( + target: LOG_TARGET, + ?substream_id, + "accept inbound substream" + ); + + let protocol_names = protocols.keys().map(|protocol| &**protocol).collect::>(); + let (io, protocol) = + Self::negotiate_protocol(stream, &Role::Listener, protocol_names).await?; + let keep_alive = *protocols.get(&protocol).expect("protocol to be one of the keys"); + + tracing::trace!( + target: LOG_TARGET, + ?substream_id, + ?protocol, + "substream accepted and negotiated" + ); + + let stream = io.inner(); + let (sender, receiver) = stream.into_parts(); + + Ok(NegotiatedSubstream { + permit, + sender, + receiver, + protocol, + substream_id, + direction: Direction::Inbound, + keep_alive, + }) + } + + /// Start the connection event loop without notifying protocols. + /// This is used when protocols have already been notified during accept(). + pub(crate) async fn start(mut self) -> crate::Result<()> { + loop { + tokio::select! { + event = self.connection.accept_bi() => match event { + Ok((send_stream, receive_stream)) => { + + let substream = self.protocol_set.next_substream_id(); + let protocols = self.protocol_set.protocols_with_keep_alives(); + let permit = self.protocol_set.try_get_permit().ok_or(Error::ConnectionClosed)?; + let stream = NegotiatingSubstream::new(send_stream, receive_stream); + let substream_open_timeout = self.substream_open_timeout; + + self.pending_substreams.push(Box::pin(async move { + match tokio::time::timeout( + substream_open_timeout, + Self::accept_substream(stream, protocols, substream, permit), + ) + .await + { + Ok(Ok(substream)) => Ok(substream), + Ok(Err(error)) => Err(ConnectionError::FailedToNegotiate { + protocol: None, + substream_id: None, + error: SubstreamError::NegotiationError(error), + }), + Err(_) => Err(ConnectionError::Timeout { + protocol: None, + substream_id: None + }), + } + })); + } + Err(error) => { + tracing::debug!(target: LOG_TARGET, peer = ?self.peer, ?error, "failed to accept substream"); + return self.protocol_set.report_connection_closed(self.peer, self.endpoint.connection_id()).await; + } + }, + substream = self.pending_substreams.select_next_some(), if !self.pending_substreams.is_empty() => { + match substream { + Err(error) => { + tracing::debug!( + target: LOG_TARGET, + ?error, + "failed to accept/open substream", + ); + + let (protocol, substream_id, error) = match error { + ConnectionError::Timeout { protocol, substream_id } => { + (protocol, substream_id, SubstreamError::NegotiationError(NegotiationError::Timeout)) + } + ConnectionError::FailedToNegotiate { protocol, substream_id, error } => { + (protocol, substream_id, error) + } + }; + + if let (Some(protocol), Some(substream_id)) = (protocol, substream_id) { + self.protocol_set + .report_substream_open_failure(protocol, substream_id, error) + .await?; + } + } + Ok(substream) => { + let protocol = substream.protocol.clone(); + let substream_id = substream.substream_id; + let direction = substream.direction; + let bandwidth_sink = self.bandwidth_sink.clone(); + let opening_permit = substream.permit; + let lifetime_permit = + substream.keep_alive.then(|| opening_permit.clone()); + + let substream = substream::Substream::new_quic( + self.peer, + substream_id, + Substream::new( + lifetime_permit, + substream.sender, + substream.receiver, + bandwidth_sink + ), + self.protocol_set.protocol_codec(&protocol) + ); + + self.protocol_set.report_substream_open( + self.peer, + protocol, + direction, + substream, + opening_permit, + ).await?; + } + } + } + command = self.protocol_set.next() => match command { + None => { + tracing::debug!( + target: LOG_TARGET, + peer = ?self.peer, + connection_id = ?self.endpoint.connection_id(), + "protocols have dropped connection" + ); + return self.protocol_set.report_connection_closed( + self.peer, + self.endpoint.connection_id(), + ).await; + } + Some(ProtocolCommand::OpenSubstream { + protocol, + fallback_names, + substream_id, + permit, + keep_alive, + connection_id: _, + }) => { + let connection = self.connection.clone(); + let substream_open_timeout = self.substream_open_timeout; + + tracing::trace!( + target: LOG_TARGET, + ?protocol, + ?fallback_names, + ?substream_id, + "open substream" + ); + + self.pending_substreams.push(Box::pin(async move { + match tokio::time::timeout( + substream_open_timeout, + Self::open_substream( + connection, + permit, + substream_id, + protocol.clone(), + fallback_names, + keep_alive, + ), + ) + .await + { + Ok(Ok(substream)) => Ok(substream), + Ok(Err(error)) => Err(ConnectionError::FailedToNegotiate { + protocol: Some(protocol), + substream_id: Some(substream_id), + error, + }), + Err(_) => Err(ConnectionError::Timeout { + protocol: None, + substream_id: None + }), + } + })); + } + Some(ProtocolCommand::ForceClose) => { + tracing::debug!( + target: LOG_TARGET, + peer = ?self.peer, + connection_id = ?self.endpoint.connection_id(), + "force closing connection", + ); + + return self.protocol_set.report_connection_closed(self.peer, self.endpoint.connection_id()).await; + } + } + } + } + } } diff --git a/client/litep2p/src/transport/quic/listener.rs b/client/litep2p/src/transport/quic/listener.rs index cfb7c874..475a6372 100644 --- a/client/litep2p/src/transport/quic/listener.rs +++ b/client/litep2p/src/transport/quic/listener.rs @@ -19,20 +19,20 @@ // DEALINGS IN THE SOFTWARE. use crate::{ - crypto::{dilithium::Keypair, tls::make_server_config}, - error::AddressError, - PeerId, + crypto::{dilithium::Keypair, tls::make_server_config}, + error::AddressError, + PeerId, }; use futures::{future::BoxFuture, stream::FuturesUnordered, FutureExt, Stream, StreamExt}; use multiaddr::{Multiaddr, Protocol}; -use quinn::{Connecting, Endpoint, ServerConfig, crypto::rustls::QuicServerConfig}; +use quinn::{crypto::rustls::QuicServerConfig, Connecting, Endpoint, ServerConfig}; use std::{ - net::{IpAddr, SocketAddr}, - pin::Pin, - sync::Arc, - task::{Context, Poll}, + net::{IpAddr, SocketAddr}, + pin::Pin, + sync::Arc, + task::{Context, Poll}, }; /// Logging target for the file. @@ -40,401 +40,390 @@ const LOG_TARGET: &str = "litep2p::quic::listener"; /// QUIC listener. pub struct QuicListener { - /// Listen addresses. - _listen_addresses: Vec, + /// Listen addresses. + _listen_addresses: Vec, - /// Listeners. - listeners: Vec, + /// Listeners. + listeners: Vec, - /// Incoming connections. - incoming: FuturesUnordered>>, + /// Incoming connections. + incoming: FuturesUnordered>>, } impl QuicListener { - /// Create new [`QuicListener`]. - pub fn new( - keypair: &Keypair, - addresses: Vec, - ) -> crate::Result<(Self, Vec)> { - let mut listeners: Vec = Vec::new(); - let mut listen_addresses = Vec::new(); - - for address in addresses.into_iter() { - let (listen_address, _) = Self::get_socket_address(&address)?; - let rustls_config = make_server_config(keypair).expect("to succeed"); - // Convert rustls config to quinn's QuicServerConfig - let quic_server_config = QuicServerConfig::try_from(rustls_config) - .expect("valid rustls config"); - let server_config = ServerConfig::with_crypto(Arc::new(quic_server_config)); - let listener = Endpoint::server(server_config, listen_address).unwrap(); - - let listen_address = listener.local_addr()?; - listen_addresses.push(listen_address); - listeners.push(listener); - } - - let listen_multi_addresses = listen_addresses - .iter() - .cloned() - .map(|address| { - Multiaddr::empty() - .with(Protocol::from(address.ip())) - .with(Protocol::Udp(address.port())) - .with(Protocol::QuicV1) - }) - .collect(); - - Ok(( - Self { - incoming: listeners - .iter_mut() - .enumerate() - .map(|(i, listener)| { - let inner = listener.clone(); - async move { - // Quinn 0.11: accept() returns Incoming, which we need to - // convert to Connecting by calling accept() - let incoming = inner.accept().await?; - let connecting = incoming.accept().ok()?; - Some((i, connecting)) - } - .boxed() - }) - .collect(), - listeners, - _listen_addresses: listen_addresses, - }, - listen_multi_addresses, - )) - } - - /// Extract socket address and `PeerId`, if found, from `address`. - pub fn get_socket_address( - address: &Multiaddr, - ) -> Result<(SocketAddr, Option), AddressError> { - tracing::trace!(target: LOG_TARGET, ?address, "parse multi address"); - - let mut iter = address.iter(); - let socket_address = match iter.next() { - Some(Protocol::Ip6(address)) => match iter.next() { - Some(Protocol::Udp(port)) => SocketAddr::new(IpAddr::V6(address), port), - protocol => { - tracing::error!( - target: LOG_TARGET, - ?protocol, - "invalid transport protocol, expected `QuicV1`", - ); - return Err(AddressError::InvalidProtocol); - } - }, - Some(Protocol::Ip4(address)) => match iter.next() { - Some(Protocol::Udp(port)) => SocketAddr::new(IpAddr::V4(address), port), - protocol => { - tracing::error!( - target: LOG_TARGET, - ?protocol, - "invalid transport protocol, expected `QuicV1`", - ); - return Err(AddressError::InvalidProtocol); - } - }, - protocol => { - tracing::error!(target: LOG_TARGET, ?protocol, "invalid transport protocol"); - return Err(AddressError::InvalidProtocol); - } - }; - - // verify that quic exists - match iter.next() { - Some(Protocol::QuicV1) => {} - _ => return Err(AddressError::InvalidProtocol), - } - - let maybe_peer = match iter.next() { - Some(Protocol::P2p(multihash)) => Some(PeerId::from_multihash(multihash)?), - None => None, - protocol => { - tracing::error!( - target: LOG_TARGET, - ?protocol, - "invalid protocol, expected `P2p` or `None`" - ); - return Err(AddressError::PeerIdMissing); - } - }; - - Ok((socket_address, maybe_peer)) - } + /// Create new [`QuicListener`]. + pub fn new( + keypair: &Keypair, + addresses: Vec, + ) -> crate::Result<(Self, Vec)> { + let mut listeners: Vec = Vec::new(); + let mut listen_addresses = Vec::new(); + + for address in addresses.into_iter() { + let (listen_address, _) = Self::get_socket_address(&address)?; + let rustls_config = make_server_config(keypair).expect("to succeed"); + // Convert rustls config to quinn's QuicServerConfig + let quic_server_config = + QuicServerConfig::try_from(rustls_config).expect("valid rustls config"); + let server_config = ServerConfig::with_crypto(Arc::new(quic_server_config)); + let listener = Endpoint::server(server_config, listen_address).unwrap(); + + let listen_address = listener.local_addr()?; + listen_addresses.push(listen_address); + listeners.push(listener); + } + + let listen_multi_addresses = listen_addresses + .iter() + .cloned() + .map(|address| { + Multiaddr::empty() + .with(Protocol::from(address.ip())) + .with(Protocol::Udp(address.port())) + .with(Protocol::QuicV1) + }) + .collect(); + + Ok(( + Self { + incoming: listeners + .iter_mut() + .enumerate() + .map(|(i, listener)| { + let inner = listener.clone(); + async move { + // Quinn 0.11: accept() returns Incoming, which we need to + // convert to Connecting by calling accept() + let incoming = inner.accept().await?; + let connecting = incoming.accept().ok()?; + Some((i, connecting)) + } + .boxed() + }) + .collect(), + listeners, + _listen_addresses: listen_addresses, + }, + listen_multi_addresses, + )) + } + + /// Extract socket address and `PeerId`, if found, from `address`. + pub fn get_socket_address( + address: &Multiaddr, + ) -> Result<(SocketAddr, Option), AddressError> { + tracing::trace!(target: LOG_TARGET, ?address, "parse multi address"); + + let mut iter = address.iter(); + let socket_address = match iter.next() { + Some(Protocol::Ip6(address)) => match iter.next() { + Some(Protocol::Udp(port)) => SocketAddr::new(IpAddr::V6(address), port), + protocol => { + tracing::error!( + target: LOG_TARGET, + ?protocol, + "invalid transport protocol, expected `QuicV1`", + ); + return Err(AddressError::InvalidProtocol); + }, + }, + Some(Protocol::Ip4(address)) => match iter.next() { + Some(Protocol::Udp(port)) => SocketAddr::new(IpAddr::V4(address), port), + protocol => { + tracing::error!( + target: LOG_TARGET, + ?protocol, + "invalid transport protocol, expected `QuicV1`", + ); + return Err(AddressError::InvalidProtocol); + }, + }, + protocol => { + tracing::error!(target: LOG_TARGET, ?protocol, "invalid transport protocol"); + return Err(AddressError::InvalidProtocol); + }, + }; + + // verify that quic exists + match iter.next() { + Some(Protocol::QuicV1) => {}, + _ => return Err(AddressError::InvalidProtocol), + } + + let maybe_peer = match iter.next() { + Some(Protocol::P2p(multihash)) => Some(PeerId::from_multihash(multihash)?), + None => None, + protocol => { + tracing::error!( + target: LOG_TARGET, + ?protocol, + "invalid protocol, expected `P2p` or `None`" + ); + return Err(AddressError::PeerIdMissing); + }, + }; + + Ok((socket_address, maybe_peer)) + } } impl Stream for QuicListener { - type Item = Connecting; - - fn poll_next(mut self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll> { - if self.incoming.is_empty() { - return Poll::Pending; - } - - match futures::ready!(self.incoming.poll_next_unpin(cx)) { - None => Poll::Ready(None), - Some(None) => Poll::Ready(None), - Some(Some((listener, future))) => { - let inner = self.listeners[listener].clone(); - self.incoming.push( - async move { - let incoming = inner.accept().await?; - let connecting = incoming.accept().ok()?; - Some((listener, connecting)) - } - .boxed(), - ); - - Poll::Ready(Some(future)) - } - } - } + type Item = Connecting; + + fn poll_next(mut self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll> { + if self.incoming.is_empty() { + return Poll::Pending; + } + + match futures::ready!(self.incoming.poll_next_unpin(cx)) { + None => Poll::Ready(None), + Some(None) => Poll::Ready(None), + Some(Some((listener, future))) => { + let inner = self.listeners[listener].clone(); + self.incoming.push( + async move { + let incoming = inner.accept().await?; + let connecting = incoming.accept().ok()?; + Some((listener, connecting)) + } + .boxed(), + ); + + Poll::Ready(Some(future)) + }, + } + } } #[cfg(test)] mod tests { - use crate::crypto::tls::make_client_config; - - use super::*; - use quinn::{ClientConfig, crypto::rustls::QuicClientConfig}; - use std::net::{IpAddr, Ipv4Addr, Ipv6Addr, SocketAddr}; - - #[test] - fn parse_multiaddresses() { - assert!(QuicListener::get_socket_address( - &"/ip6/::1/udp/8888/quic-v1".parse().expect("valid multiaddress") - ) - .is_ok()); - assert!(QuicListener::get_socket_address( - &"/ip4/127.0.0.1/udp/8888/quic-v1".parse().expect("valid multiaddress") - ) - .is_ok()); - assert!(QuicListener::get_socket_address( - &"/ip6/::1/udp/8888/quic-v1/p2p/12D3KooWT2ouvz5uMmCvHJGzAGRHiqDts5hzXR7NdoQ27pGdzp9Q" - .parse() - .expect("valid multiaddress") - ) - .is_ok()); - assert!(QuicListener::get_socket_address( + use crate::crypto::tls::make_client_config; + + use super::*; + use quinn::{crypto::rustls::QuicClientConfig, ClientConfig}; + use std::net::{IpAddr, Ipv4Addr, Ipv6Addr, SocketAddr}; + + #[test] + fn parse_multiaddresses() { + assert!(QuicListener::get_socket_address( + &"/ip6/::1/udp/8888/quic-v1".parse().expect("valid multiaddress") + ) + .is_ok()); + assert!(QuicListener::get_socket_address( + &"/ip4/127.0.0.1/udp/8888/quic-v1".parse().expect("valid multiaddress") + ) + .is_ok()); + assert!(QuicListener::get_socket_address( + &"/ip6/::1/udp/8888/quic-v1/p2p/12D3KooWT2ouvz5uMmCvHJGzAGRHiqDts5hzXR7NdoQ27pGdzp9Q" + .parse() + .expect("valid multiaddress") + ) + .is_ok()); + assert!(QuicListener::get_socket_address( &"/ip4/127.0.0.1/udp/8888/quic-v1/p2p/12D3KooWT2ouvz5uMmCvHJGzAGRHiqDts5hzXR7NdoQ27pGdzp9Q" .parse() .expect("valid multiaddress") ) .is_ok()); - assert!(QuicListener::get_socket_address( - &"/ip6/::1/tcp/8888/quic-v1/p2p/12D3KooWT2ouvz5uMmCvHJGzAGRHiqDts5hzXR7NdoQ27pGdzp9Q" - .parse() - .expect("valid multiaddress") - ) - .is_err()); - assert!(QuicListener::get_socket_address( - &"/ip4/127.0.0.1/udp/8888/p2p/12D3KooWT2ouvz5uMmCvHJGzAGRHiqDts5hzXR7NdoQ27pGdzp9Q" - .parse() - .expect("valid multiaddress") - ) - .is_err()); - assert!(QuicListener::get_socket_address( - &"/ip4/127.0.0.1/tcp/8888/p2p/12D3KooWT2ouvz5uMmCvHJGzAGRHiqDts5hzXR7NdoQ27pGdzp9Q" - .parse() - .expect("valid multiaddress") - ) - .is_err()); - assert!(QuicListener::get_socket_address( - &"/dns/google.com/tcp/8888/p2p/12D3KooWT2ouvz5uMmCvHJGzAGRHiqDts5hzXR7NdoQ27pGdzp9Q" - .parse() - .expect("valid multiaddress") - ) - .is_err()); - assert!(QuicListener::get_socket_address( - &"/ip6/::1/udp/8888/quic-v1/utp".parse().expect("valid multiaddress") - ) - .is_err()); - } - - #[tokio::test] - async fn no_listeners() { - let (mut listener, _) = QuicListener::new(&Keypair::generate(), Vec::new()).unwrap(); - - futures::future::poll_fn(|cx| match listener.poll_next_unpin(cx) { - Poll::Pending => Poll::Ready(()), - event => panic!("unexpected event: {event:?}"), - }) - .await; - } - - #[tokio::test] - async fn one_listener() { - let address: Multiaddr = "/ip6/::1/udp/0/quic-v1".parse().unwrap(); - let keypair = Keypair::generate(); - let peer = PeerId::from_public_key(&keypair.public().into()); - let (mut listener, listen_addresses) = - QuicListener::new(&keypair, vec![address.clone()]).unwrap(); - let Some(Protocol::Udp(port)) = listen_addresses.first().unwrap().clone().iter().nth(1) - else { - panic!("invalid address"); - }; - - let crypto_config = make_client_config(&Keypair::generate(), Some(peer)).expect("to succeed"); - let quic_client_config = QuicClientConfig::try_from(crypto_config).expect("valid config"); - let client_config = ClientConfig::new(Arc::new(quic_client_config)); - let client = - Endpoint::client(SocketAddr::new(IpAddr::V6(Ipv6Addr::UNSPECIFIED), 0)).unwrap(); - let connection = client - .connect_with(client_config, format!("[::1]:{port}").parse().unwrap(), "l") - .unwrap(); - - let (res1, res2) = tokio::join!( - listener.next(), - Box::pin(async move { - match connection.await { - Ok(connection) => Ok(connection), - Err(error) => Err(error), - } - }) - ); - - assert!(res1.is_some() && res2.is_ok()); - } - - #[tokio::test] - async fn two_listeners() { - let _ = tracing_subscriber::fmt() - .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) - .try_init(); - - let address1: Multiaddr = "/ip6/::1/udp/0/quic-v1".parse().unwrap(); - let address2: Multiaddr = "/ip4/127.0.0.1/udp/0/quic-v1".parse().unwrap(); - let keypair = Keypair::generate(); - let peer = PeerId::from_public_key(&keypair.public().into()); - - let (mut listener, listen_addresses) = - QuicListener::new(&keypair, vec![address1, address2]).unwrap(); - - let Some(Protocol::Udp(port1)) = listen_addresses.first().unwrap().clone().iter().nth(1) - else { - panic!("invalid address"); - }; - - let Some(Protocol::Udp(port2)) = - listen_addresses.iter().nth(1).unwrap().clone().iter().nth(1) - else { - panic!("invalid address"); - }; - - let crypto_config1 = make_client_config(&Keypair::generate(), Some(peer)).expect("to succeed"); - let quic_client_config1 = QuicClientConfig::try_from(crypto_config1).expect("valid config"); - let client_config1 = ClientConfig::new(Arc::new(quic_client_config1)); - let client1 = - Endpoint::client(SocketAddr::new(IpAddr::V6(Ipv6Addr::UNSPECIFIED), 0)).unwrap(); - let connection1 = client1 - .connect_with( - client_config1, - format!("[::1]:{port1}").parse().unwrap(), - "l", - ) - .unwrap(); - - let crypto_config2 = make_client_config(&Keypair::generate(), Some(peer)).expect("to succeed"); - let quic_client_config2 = QuicClientConfig::try_from(crypto_config2).expect("valid config"); - let client_config2 = ClientConfig::new(Arc::new(quic_client_config2)); - let client2 = - Endpoint::client(SocketAddr::new(IpAddr::V4(Ipv4Addr::UNSPECIFIED), 0)).unwrap(); - let connection2 = client2 - .connect_with( - client_config2, - format!("127.0.0.1:{port2}").parse().unwrap(), - "l", - ) - .unwrap(); - - tokio::spawn(async move { - match connection1.await { - Ok(connection) => Ok(connection), - Err(error) => Err(error), - } - }); - - tokio::spawn(async move { - match connection2.await { - Ok(connection) => Ok(connection), - Err(error) => Err(error), - } - }); - - for _ in 0..2 { - let _ = listener.next().await; - } - } - - #[tokio::test] - async fn two_clients_dialing_same_address() { - let _ = tracing_subscriber::fmt() - .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) - .try_init(); - - let keypair = Keypair::generate(); - let peer = PeerId::from_public_key(&keypair.public().into()); - - let (mut listener, listen_addresses) = QuicListener::new( - &keypair, - vec![ - "/ip6/::1/udp/0/quic-v1".parse().unwrap(), - "/ip4/127.0.0.1/udp/0/quic-v1".parse().unwrap(), - ], - ) - .unwrap(); - - let Some(Protocol::Udp(port)) = listen_addresses.first().unwrap().clone().iter().nth(1) - else { - panic!("invalid address"); - }; - - let crypto_config1 = make_client_config(&Keypair::generate(), Some(peer)).expect("to succeed"); - let quic_client_config1 = QuicClientConfig::try_from(crypto_config1).expect("valid config"); - let client_config1 = ClientConfig::new(Arc::new(quic_client_config1)); - let client1 = - Endpoint::client(SocketAddr::new(IpAddr::V6(Ipv6Addr::UNSPECIFIED), 0)).unwrap(); - let connection1 = client1 - .connect_with( - client_config1, - format!("[::1]:{port}").parse().unwrap(), - "l", - ) - .unwrap(); - - let crypto_config2 = make_client_config(&Keypair::generate(), Some(peer)).expect("to succeed"); - let quic_client_config2 = QuicClientConfig::try_from(crypto_config2).expect("valid config"); - let client_config2 = ClientConfig::new(Arc::new(quic_client_config2)); - let client2 = - Endpoint::client(SocketAddr::new(IpAddr::V6(Ipv6Addr::UNSPECIFIED), 0)).unwrap(); - let connection2 = client2 - .connect_with( - client_config2, - format!("[::1]:{port}").parse().unwrap(), - "l", - ) - .unwrap(); - - tokio::spawn(async move { - match connection1.await { - Ok(connection) => Ok(connection), - Err(error) => Err(error), - } - }); - - tokio::spawn(async move { - match connection2.await { - Ok(connection) => Ok(connection), - Err(error) => Err(error), - } - }); - - for _ in 0..2 { - let _ = listener.next().await; - } - } + assert!(QuicListener::get_socket_address( + &"/ip6/::1/tcp/8888/quic-v1/p2p/12D3KooWT2ouvz5uMmCvHJGzAGRHiqDts5hzXR7NdoQ27pGdzp9Q" + .parse() + .expect("valid multiaddress") + ) + .is_err()); + assert!(QuicListener::get_socket_address( + &"/ip4/127.0.0.1/udp/8888/p2p/12D3KooWT2ouvz5uMmCvHJGzAGRHiqDts5hzXR7NdoQ27pGdzp9Q" + .parse() + .expect("valid multiaddress") + ) + .is_err()); + assert!(QuicListener::get_socket_address( + &"/ip4/127.0.0.1/tcp/8888/p2p/12D3KooWT2ouvz5uMmCvHJGzAGRHiqDts5hzXR7NdoQ27pGdzp9Q" + .parse() + .expect("valid multiaddress") + ) + .is_err()); + assert!(QuicListener::get_socket_address( + &"/dns/google.com/tcp/8888/p2p/12D3KooWT2ouvz5uMmCvHJGzAGRHiqDts5hzXR7NdoQ27pGdzp9Q" + .parse() + .expect("valid multiaddress") + ) + .is_err()); + assert!(QuicListener::get_socket_address( + &"/ip6/::1/udp/8888/quic-v1/utp".parse().expect("valid multiaddress") + ) + .is_err()); + } + + #[tokio::test] + async fn no_listeners() { + let (mut listener, _) = QuicListener::new(&Keypair::generate(), Vec::new()).unwrap(); + + futures::future::poll_fn(|cx| match listener.poll_next_unpin(cx) { + Poll::Pending => Poll::Ready(()), + event => panic!("unexpected event: {event:?}"), + }) + .await; + } + + #[tokio::test] + async fn one_listener() { + let address: Multiaddr = "/ip6/::1/udp/0/quic-v1".parse().unwrap(); + let keypair = Keypair::generate(); + let peer = PeerId::from_public_key(&keypair.public().into()); + let (mut listener, listen_addresses) = + QuicListener::new(&keypair, vec![address.clone()]).unwrap(); + let Some(Protocol::Udp(port)) = listen_addresses.first().unwrap().clone().iter().nth(1) + else { + panic!("invalid address"); + }; + + let crypto_config = + make_client_config(&Keypair::generate(), Some(peer)).expect("to succeed"); + let quic_client_config = QuicClientConfig::try_from(crypto_config).expect("valid config"); + let client_config = ClientConfig::new(Arc::new(quic_client_config)); + let client = + Endpoint::client(SocketAddr::new(IpAddr::V6(Ipv6Addr::UNSPECIFIED), 0)).unwrap(); + let connection = client + .connect_with(client_config, format!("[::1]:{port}").parse().unwrap(), "l") + .unwrap(); + + let (res1, res2) = tokio::join!( + listener.next(), + Box::pin(async move { + match connection.await { + Ok(connection) => Ok(connection), + Err(error) => Err(error), + } + }) + ); + + assert!(res1.is_some() && res2.is_ok()); + } + + #[tokio::test] + async fn two_listeners() { + let _ = tracing_subscriber::fmt() + .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) + .try_init(); + + let address1: Multiaddr = "/ip6/::1/udp/0/quic-v1".parse().unwrap(); + let address2: Multiaddr = "/ip4/127.0.0.1/udp/0/quic-v1".parse().unwrap(); + let keypair = Keypair::generate(); + let peer = PeerId::from_public_key(&keypair.public().into()); + + let (mut listener, listen_addresses) = + QuicListener::new(&keypair, vec![address1, address2]).unwrap(); + + let Some(Protocol::Udp(port1)) = listen_addresses.first().unwrap().clone().iter().nth(1) + else { + panic!("invalid address"); + }; + + let Some(Protocol::Udp(port2)) = + listen_addresses.iter().nth(1).unwrap().clone().iter().nth(1) + else { + panic!("invalid address"); + }; + + let crypto_config1 = + make_client_config(&Keypair::generate(), Some(peer)).expect("to succeed"); + let quic_client_config1 = QuicClientConfig::try_from(crypto_config1).expect("valid config"); + let client_config1 = ClientConfig::new(Arc::new(quic_client_config1)); + let client1 = + Endpoint::client(SocketAddr::new(IpAddr::V6(Ipv6Addr::UNSPECIFIED), 0)).unwrap(); + let connection1 = client1 + .connect_with(client_config1, format!("[::1]:{port1}").parse().unwrap(), "l") + .unwrap(); + + let crypto_config2 = + make_client_config(&Keypair::generate(), Some(peer)).expect("to succeed"); + let quic_client_config2 = QuicClientConfig::try_from(crypto_config2).expect("valid config"); + let client_config2 = ClientConfig::new(Arc::new(quic_client_config2)); + let client2 = + Endpoint::client(SocketAddr::new(IpAddr::V4(Ipv4Addr::UNSPECIFIED), 0)).unwrap(); + let connection2 = client2 + .connect_with(client_config2, format!("127.0.0.1:{port2}").parse().unwrap(), "l") + .unwrap(); + + tokio::spawn(async move { + match connection1.await { + Ok(connection) => Ok(connection), + Err(error) => Err(error), + } + }); + + tokio::spawn(async move { + match connection2.await { + Ok(connection) => Ok(connection), + Err(error) => Err(error), + } + }); + + for _ in 0..2 { + let _ = listener.next().await; + } + } + + #[tokio::test] + async fn two_clients_dialing_same_address() { + let _ = tracing_subscriber::fmt() + .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) + .try_init(); + + let keypair = Keypair::generate(); + let peer = PeerId::from_public_key(&keypair.public().into()); + + let (mut listener, listen_addresses) = QuicListener::new( + &keypair, + vec![ + "/ip6/::1/udp/0/quic-v1".parse().unwrap(), + "/ip4/127.0.0.1/udp/0/quic-v1".parse().unwrap(), + ], + ) + .unwrap(); + + let Some(Protocol::Udp(port)) = listen_addresses.first().unwrap().clone().iter().nth(1) + else { + panic!("invalid address"); + }; + + let crypto_config1 = + make_client_config(&Keypair::generate(), Some(peer)).expect("to succeed"); + let quic_client_config1 = QuicClientConfig::try_from(crypto_config1).expect("valid config"); + let client_config1 = ClientConfig::new(Arc::new(quic_client_config1)); + let client1 = + Endpoint::client(SocketAddr::new(IpAddr::V6(Ipv6Addr::UNSPECIFIED), 0)).unwrap(); + let connection1 = client1 + .connect_with(client_config1, format!("[::1]:{port}").parse().unwrap(), "l") + .unwrap(); + + let crypto_config2 = + make_client_config(&Keypair::generate(), Some(peer)).expect("to succeed"); + let quic_client_config2 = QuicClientConfig::try_from(crypto_config2).expect("valid config"); + let client_config2 = ClientConfig::new(Arc::new(quic_client_config2)); + let client2 = + Endpoint::client(SocketAddr::new(IpAddr::V6(Ipv6Addr::UNSPECIFIED), 0)).unwrap(); + let connection2 = client2 + .connect_with(client_config2, format!("[::1]:{port}").parse().unwrap(), "l") + .unwrap(); + + tokio::spawn(async move { + match connection1.await { + Ok(connection) => Ok(connection), + Err(error) => Err(error), + } + }); + + tokio::spawn(async move { + match connection2.await { + Ok(connection) => Ok(connection), + Err(error) => Err(error), + } + }); + + for _ in 0..2 { + let _ = listener.next().await; + } + } } diff --git a/client/litep2p/src/transport/quic/mod.rs b/client/litep2p/src/transport/quic/mod.rs index 799fd51d..e99ff2f7 100644 --- a/client/litep2p/src/transport/quic/mod.rs +++ b/client/litep2p/src/transport/quic/mod.rs @@ -23,32 +23,34 @@ //! QUIC transport. use crate::{ - crypto::tls::make_client_config, - error::{AddressError, DialError, Error, QuicError}, - transport::{ - manager::TransportHandle, - quic::{config::Config as QuicConfig, connection::QuicConnection, listener::QuicListener}, - Endpoint as Litep2pEndpoint, Transport, TransportBuilder, TransportEvent, - }, - types::ConnectionId, - PeerId, + crypto::tls::make_client_config, + error::{AddressError, DialError, Error, QuicError}, + transport::{ + manager::TransportHandle, + quic::{config::Config as QuicConfig, connection::QuicConnection, listener::QuicListener}, + Endpoint as Litep2pEndpoint, Transport, TransportBuilder, TransportEvent, + }, + types::ConnectionId, + PeerId, }; use futures::{ - future::BoxFuture, - stream::{AbortHandle, FuturesUnordered}, - Stream, StreamExt, TryFutureExt, + future::BoxFuture, + stream::{AbortHandle, FuturesUnordered}, + Stream, StreamExt, TryFutureExt, }; use hickory_resolver::TokioResolver; use multiaddr::{Multiaddr, Protocol}; -use quinn::{ClientConfig, Connecting, Connection, Endpoint, IdleTimeout, crypto::rustls::QuicClientConfig}; +use quinn::{ + crypto::rustls::QuicClientConfig, ClientConfig, Connecting, Connection, Endpoint, IdleTimeout, +}; use std::{ - collections::HashMap, - net::{IpAddr, Ipv4Addr, Ipv6Addr, SocketAddr}, - pin::Pin, - sync::Arc, - task::{Context, Poll}, + collections::HashMap, + net::{IpAddr, Ipv4Addr, Ipv6Addr, SocketAddr}, + pin::Pin, + sync::Arc, + task::{Context, Poll}, }; pub(crate) use substream::Substream; @@ -64,642 +66,615 @@ const LOG_TARGET: &str = "litep2p::quic"; #[derive(Debug)] struct NegotiatedConnection { - /// Remote peer ID. - peer: PeerId, + /// Remote peer ID. + peer: PeerId, - /// QUIC connection. - connection: Connection, + /// QUIC connection. + connection: Connection, } #[derive(Debug)] enum RawConnectionResult { - /// The first successful connection. - Connected { - connection_id: ConnectionId, - address: Multiaddr, - stream: NegotiatedConnection, - errors: Vec<(Multiaddr, DialError)>, - }, - - /// All connection attempts failed. - Failed { - connection_id: ConnectionId, - errors: Vec<(Multiaddr, DialError)>, - }, - - /// Future was canceled. - Canceled { connection_id: ConnectionId }, + /// The first successful connection. + Connected { + connection_id: ConnectionId, + address: Multiaddr, + stream: NegotiatedConnection, + errors: Vec<(Multiaddr, DialError)>, + }, + + /// All connection attempts failed. + Failed { connection_id: ConnectionId, errors: Vec<(Multiaddr, DialError)> }, + + /// Future was canceled. + Canceled { connection_id: ConnectionId }, } /// QUIC transport object. pub(crate) struct QuicTransport { - /// Transport handle. - context: TransportHandle, + /// Transport handle. + context: TransportHandle, - /// Transport config. - config: QuicConfig, + /// Transport config. + config: QuicConfig, - /// QUIC listener. - listener: QuicListener, + /// QUIC listener. + listener: QuicListener, - /// Pending dials. - pending_dials: HashMap, + /// Pending dials. + pending_dials: HashMap, - /// Pending inbound connections. - pending_inbound_connections: HashMap, + /// Pending inbound connections. + pending_inbound_connections: HashMap, - /// Pending connections. - pending_connections: FuturesUnordered< - BoxFuture<'static, (ConnectionId, Result)>, - >, + /// Pending connections. + pending_connections: FuturesUnordered< + BoxFuture<'static, (ConnectionId, Result)>, + >, - /// Negotiated connections waiting for validation. - pending_open: HashMap, + /// Negotiated connections waiting for validation. + pending_open: HashMap, - /// Pending raw, unnegotiated connections. - pending_raw_connections: FuturesUnordered>, + /// Pending raw, unnegotiated connections. + pending_raw_connections: FuturesUnordered>, - /// Opened raw connection, waiting for approval/rejection from `TransportManager`. - opened_raw: HashMap, + /// Opened raw connection, waiting for approval/rejection from `TransportManager`. + opened_raw: HashMap, - /// Cancel raw connections futures. - /// - /// This is cancelling `Self::pending_raw_connections`. - cancel_futures: HashMap, + /// Cancel raw connections futures. + /// + /// This is cancelling `Self::pending_raw_connections`. + cancel_futures: HashMap, } impl QuicTransport { - /// Attempt to extract `PeerId` from connection certificates. - fn extract_peer_id(connection: &Connection) -> Option { - let certificates: Box>> = - connection.peer_identity()?.downcast().ok()?; - let p2p_cert = crate::crypto::tls::certificate::parse(certificates.first()?) - .expect("the certificate was validated during TLS handshake; qed"); - - Some(p2p_cert.peer_id()) - } - - /// Handle inbound accepted connection. - fn on_inbound_connection(&mut self, connection_id: ConnectionId, connection: Connecting) { - self.pending_connections.push(Box::pin(async move { - let connection = match connection.await { - Ok(connection) => connection, - Err(error) => return (connection_id, Err(DialError::from(error))), - }; - - let Some(peer) = Self::extract_peer_id(&connection) else { - return ( - connection_id, - Err(crate::error::NegotiationError::Quic(QuicError::InvalidCertificate).into()), - ); - }; - - (connection_id, Ok(NegotiatedConnection { peer, connection })) - })); - } - - /// Handle established connection. - fn on_connection_established( - &mut self, - connection_id: ConnectionId, - result: Result, - ) -> Option { - tracing::debug!(target: LOG_TARGET, ?connection_id, success = result.is_ok(), "connection established"); - - // `on_connection_established()` is called for both inbound and outbound connections - // but `pending_dials` will only contain entries for outbound connections. - let maybe_address = self.pending_dials.remove(&connection_id); - - match result { - Ok(connection) => { - let peer = connection.peer; - let endpoint = maybe_address.map_or( - { - let address = connection.connection.remote_address(); - Litep2pEndpoint::listener( - Multiaddr::empty() - .with(Protocol::from(address.ip())) - .with(Protocol::Udp(address.port())) - .with(Protocol::QuicV1), - connection_id, - ) - }, - |address| Litep2pEndpoint::dialer(address, connection_id), - ); - self.pending_open.insert(connection_id, (connection, endpoint.clone())); - - return Some(TransportEvent::ConnectionEstablished { peer, endpoint }); - } - Err(error) => { - tracing::debug!(target: LOG_TARGET, ?connection_id, ?error, "failed to establish connection"); - - // since the address was found from `pending_dials`, - // report the error to protocols and `TransportManager` - if let Some(address) = maybe_address { - return Some(TransportEvent::DialFailure { - connection_id, - address, - error, - }); - } - } - } - - None - } + /// Attempt to extract `PeerId` from connection certificates. + fn extract_peer_id(connection: &Connection) -> Option { + let certificates: Box>> = + connection.peer_identity()?.downcast().ok()?; + let p2p_cert = crate::crypto::tls::certificate::parse(certificates.first()?) + .expect("the certificate was validated during TLS handshake; qed"); + + Some(p2p_cert.peer_id()) + } + + /// Handle inbound accepted connection. + fn on_inbound_connection(&mut self, connection_id: ConnectionId, connection: Connecting) { + self.pending_connections.push(Box::pin(async move { + let connection = match connection.await { + Ok(connection) => connection, + Err(error) => return (connection_id, Err(DialError::from(error))), + }; + + let Some(peer) = Self::extract_peer_id(&connection) else { + return ( + connection_id, + Err(crate::error::NegotiationError::Quic(QuicError::InvalidCertificate).into()), + ); + }; + + (connection_id, Ok(NegotiatedConnection { peer, connection })) + })); + } + + /// Handle established connection. + fn on_connection_established( + &mut self, + connection_id: ConnectionId, + result: Result, + ) -> Option { + tracing::debug!(target: LOG_TARGET, ?connection_id, success = result.is_ok(), "connection established"); + + // `on_connection_established()` is called for both inbound and outbound connections + // but `pending_dials` will only contain entries for outbound connections. + let maybe_address = self.pending_dials.remove(&connection_id); + + match result { + Ok(connection) => { + let peer = connection.peer; + let endpoint = maybe_address.map_or( + { + let address = connection.connection.remote_address(); + Litep2pEndpoint::listener( + Multiaddr::empty() + .with(Protocol::from(address.ip())) + .with(Protocol::Udp(address.port())) + .with(Protocol::QuicV1), + connection_id, + ) + }, + |address| Litep2pEndpoint::dialer(address, connection_id), + ); + self.pending_open.insert(connection_id, (connection, endpoint.clone())); + + return Some(TransportEvent::ConnectionEstablished { peer, endpoint }); + }, + Err(error) => { + tracing::debug!(target: LOG_TARGET, ?connection_id, ?error, "failed to establish connection"); + + // since the address was found from `pending_dials`, + // report the error to protocols and `TransportManager` + if let Some(address) = maybe_address { + return Some(TransportEvent::DialFailure { connection_id, address, error }); + } + }, + } + + None + } } impl TransportBuilder for QuicTransport { - type Config = QuicConfig; - type Transport = QuicTransport; - - /// Create new [`QuicTransport`] object. - fn new( - context: TransportHandle, - mut config: Self::Config, - _resolver: Arc, - ) -> crate::Result<(Self, Vec)> - where - Self: Sized, - { - tracing::info!( - target: LOG_TARGET, - ?config, - "start quic transport", - ); - - let (listener, listen_addresses) = QuicListener::new( - &context.keypair, - std::mem::take(&mut config.listen_addresses), - )?; - - Ok(( - Self { - context, - config, - listener, - opened_raw: HashMap::new(), - pending_open: HashMap::new(), - pending_dials: HashMap::new(), - pending_inbound_connections: HashMap::new(), - pending_raw_connections: FuturesUnordered::new(), - pending_connections: FuturesUnordered::new(), - cancel_futures: HashMap::new(), - }, - listen_addresses, - )) - } + type Config = QuicConfig; + type Transport = QuicTransport; + + /// Create new [`QuicTransport`] object. + fn new( + context: TransportHandle, + mut config: Self::Config, + _resolver: Arc, + ) -> crate::Result<(Self, Vec)> + where + Self: Sized, + { + tracing::info!( + target: LOG_TARGET, + ?config, + "start quic transport", + ); + + let (listener, listen_addresses) = + QuicListener::new(&context.keypair, std::mem::take(&mut config.listen_addresses))?; + + Ok(( + Self { + context, + config, + listener, + opened_raw: HashMap::new(), + pending_open: HashMap::new(), + pending_dials: HashMap::new(), + pending_inbound_connections: HashMap::new(), + pending_raw_connections: FuturesUnordered::new(), + pending_connections: FuturesUnordered::new(), + cancel_futures: HashMap::new(), + }, + listen_addresses, + )) + } } impl Transport for QuicTransport { - fn dial(&mut self, connection_id: ConnectionId, address: Multiaddr) -> crate::Result<()> { - let Ok((socket_address, Some(peer))) = QuicListener::get_socket_address(&address) else { - return Err(Error::AddressError(AddressError::PeerIdMissing)); - }; - - let crypto_config = make_client_config(&self.context.keypair, Some(peer)).expect("to succeed"); - let quic_client_config = QuicClientConfig::try_from(crypto_config) - .map_err(|e| Error::Other(format!("invalid crypto config: {e}")))?; - let mut transport_config = quinn::TransportConfig::default(); - let timeout = - IdleTimeout::try_from(self.config.connection_open_timeout).expect("to succeed"); - transport_config.max_idle_timeout(Some(timeout)); - let mut client_config = ClientConfig::new(Arc::new(quic_client_config)); - client_config.transport_config(Arc::new(transport_config)); - - let client_listen_address = match address.iter().next() { - Some(Protocol::Ip6(_)) => SocketAddr::new(IpAddr::V6(Ipv6Addr::UNSPECIFIED), 0), - Some(Protocol::Ip4(_)) => SocketAddr::new(IpAddr::V4(Ipv4Addr::UNSPECIFIED), 0), - _ => return Err(Error::AddressError(AddressError::InvalidProtocol)), - }; - - let client = Endpoint::client(client_listen_address) - .map_err(|error| Error::Other(error.to_string()))?; - let connection = client - .connect_with(client_config, socket_address, "l") - .map_err(|error| Error::Other(error.to_string()))?; - - tracing::trace!( - target: LOG_TARGET, - ?address, - ?peer, - ?client_listen_address, - "dial peer", - ); - - self.pending_dials.insert(connection_id, address); - - self.pending_connections.push(Box::pin(async move { - let connection = match connection.await { - Ok(connection) => connection, - Err(error) => return (connection_id, Err(DialError::from(error))), - }; - - let Some(peer) = Self::extract_peer_id(&connection) else { - return ( - connection_id, - Err(crate::error::NegotiationError::Quic(QuicError::InvalidCertificate).into()), - ); - }; - - (connection_id, Ok(NegotiatedConnection { peer, connection })) - })); - - Ok(()) - } - - fn accept( - &mut self, - connection_id: ConnectionId, - ) -> crate::Result>> { - let (connection, endpoint) = self - .pending_open - .remove(&connection_id) - .ok_or(Error::ConnectionDoesntExist(connection_id))?; - let bandwidth_sink = self.context.bandwidth_sink.clone(); - let mut protocol_set = self.context.protocol_set(connection_id); - let substream_open_timeout = self.config.substream_open_timeout; - let executor = self.context.executor.clone(); - - tracing::trace!( - target: LOG_TARGET, - ?connection_id, - "start connection", - ); - - let peer = connection.peer; - let endpoint_clone = endpoint.clone(); - - Ok(Box::pin(async move { - // First, notify all protocols about the connection establishment - protocol_set.report_connection_established(peer, endpoint_clone).await?; - - // After protocols are notified, spawn the connection event loop - executor.run(Box::pin(async move { - let _ = QuicConnection::new( - peer, - endpoint, - connection.connection, - protocol_set, - bandwidth_sink, - substream_open_timeout, - ) - .start() - .await; - })); - - Ok(()) - })) - } - - fn reject(&mut self, connection_id: ConnectionId) -> crate::Result<()> { - self.pending_open - .remove(&connection_id) - .map_or(Err(Error::ConnectionDoesntExist(connection_id)), |_| Ok(())) - } - - fn accept_pending(&mut self, connection_id: ConnectionId) -> crate::Result<()> { - let connection = self - .pending_inbound_connections - .remove(&connection_id) - .ok_or(Error::ConnectionDoesntExist(connection_id))?; - - self.on_inbound_connection(connection_id, connection); - - Ok(()) - } - - fn reject_pending(&mut self, connection_id: ConnectionId) -> crate::Result<()> { - self.pending_inbound_connections - .remove(&connection_id) - .map_or(Err(Error::ConnectionDoesntExist(connection_id)), |_| Ok(())) - } - - fn open( - &mut self, - connection_id: ConnectionId, - addresses: Vec, - ) -> crate::Result<()> { - let num_addresses = addresses.len(); - let mut futures: FuturesUnordered<_> = addresses - .into_iter() - .map(|address| { - let keypair = self.context.keypair.clone(); - let connection_open_timeout = self.config.connection_open_timeout; - let addr = address.clone(); - - let future = async move { - let (socket_address, peer) = QuicListener::get_socket_address(&address) - .map_err(DialError::AddressError)?; - let peer = - peer.ok_or_else(|| DialError::AddressError(AddressError::PeerIdMissing))?; - - let crypto_config = make_client_config(&keypair, Some(peer)).expect("to succeed"); - let quic_client_config = QuicClientConfig::try_from(crypto_config) - .expect("valid crypto config"); - let mut transport_config = quinn::TransportConfig::default(); - let timeout = - IdleTimeout::try_from(connection_open_timeout).expect("to succeed"); - transport_config.max_idle_timeout(Some(timeout)); - let mut client_config = ClientConfig::new(Arc::new(quic_client_config)); - client_config.transport_config(Arc::new(transport_config)); - - let client_listen_address = match address.iter().next() { - Some(Protocol::Ip6(_)) => - SocketAddr::new(IpAddr::V6(Ipv6Addr::UNSPECIFIED), 0), - Some(Protocol::Ip4(_)) => - SocketAddr::new(IpAddr::V4(Ipv4Addr::UNSPECIFIED), 0), - _ => return Err(AddressError::InvalidProtocol.into()), - }; - - let client = match Endpoint::client(client_listen_address) { - Ok(client) => client, - Err(error) => { - return Err(DialError::from(error)); - } - }; - let connection = match client.connect_with(client_config, socket_address, "l") { - Ok(connection) => connection, - Err(error) => return Err(DialError::from(error)), - }; - - let connection = match connection.await { - Ok(connection) => connection, - Err(error) => return Err(DialError::from(error)), - }; - - let Some(peer) = Self::extract_peer_id(&connection) else { - return Err(crate::error::NegotiationError::Quic( - QuicError::InvalidCertificate, - ) - .into()); - }; - - Ok(NegotiatedConnection { peer, connection }) - }; - - async move { future.await.map(|ok| (addr.clone(), ok)).map_err(|err| (addr, err)) } - }) - .collect(); - - // Future that will resolve to the first successful connection. - let future = async move { - let mut errors = Vec::with_capacity(num_addresses); - - while let Some(result) = futures.next().await { - match result { - Ok((address, stream)) => - return RawConnectionResult::Connected { - connection_id, - address, - stream, - errors, - }, - Err(error) => { - tracing::debug!( - target: LOG_TARGET, - ?connection_id, - ?error, - "failed to open connection", - ); - errors.push(error) - } - } - } - - RawConnectionResult::Failed { - connection_id, - errors, - } - }; - - let (fut, handle) = futures::future::abortable(future); - let fut = fut.unwrap_or_else(move |_| RawConnectionResult::Canceled { connection_id }); - self.pending_raw_connections.push(Box::pin(fut)); - self.cancel_futures.insert(connection_id, handle); - - Ok(()) - } - - fn negotiate(&mut self, connection_id: ConnectionId) -> crate::Result<()> { - let (connection, _address) = self - .opened_raw - .remove(&connection_id) - .ok_or(Error::ConnectionDoesntExist(connection_id))?; - - self.pending_connections - .push(Box::pin(async move { (connection_id, Ok(connection)) })); - - Ok(()) - } - - /// Cancel opening connections. - fn cancel(&mut self, connection_id: ConnectionId) { - // Cancel the future if it exists. - // State clean-up happens inside the `poll_next`. - if let Some(handle) = self.cancel_futures.get(&connection_id) { - handle.abort(); - } - } + fn dial(&mut self, connection_id: ConnectionId, address: Multiaddr) -> crate::Result<()> { + let Ok((socket_address, Some(peer))) = QuicListener::get_socket_address(&address) else { + return Err(Error::AddressError(AddressError::PeerIdMissing)); + }; + + let crypto_config = + make_client_config(&self.context.keypair, Some(peer)).expect("to succeed"); + let quic_client_config = QuicClientConfig::try_from(crypto_config) + .map_err(|e| Error::Other(format!("invalid crypto config: {e}")))?; + let mut transport_config = quinn::TransportConfig::default(); + let timeout = + IdleTimeout::try_from(self.config.connection_open_timeout).expect("to succeed"); + transport_config.max_idle_timeout(Some(timeout)); + let mut client_config = ClientConfig::new(Arc::new(quic_client_config)); + client_config.transport_config(Arc::new(transport_config)); + + let client_listen_address = match address.iter().next() { + Some(Protocol::Ip6(_)) => SocketAddr::new(IpAddr::V6(Ipv6Addr::UNSPECIFIED), 0), + Some(Protocol::Ip4(_)) => SocketAddr::new(IpAddr::V4(Ipv4Addr::UNSPECIFIED), 0), + _ => return Err(Error::AddressError(AddressError::InvalidProtocol)), + }; + + let client = Endpoint::client(client_listen_address) + .map_err(|error| Error::Other(error.to_string()))?; + let connection = client + .connect_with(client_config, socket_address, "l") + .map_err(|error| Error::Other(error.to_string()))?; + + tracing::trace!( + target: LOG_TARGET, + ?address, + ?peer, + ?client_listen_address, + "dial peer", + ); + + self.pending_dials.insert(connection_id, address); + + self.pending_connections.push(Box::pin(async move { + let connection = match connection.await { + Ok(connection) => connection, + Err(error) => return (connection_id, Err(DialError::from(error))), + }; + + let Some(peer) = Self::extract_peer_id(&connection) else { + return ( + connection_id, + Err(crate::error::NegotiationError::Quic(QuicError::InvalidCertificate).into()), + ); + }; + + (connection_id, Ok(NegotiatedConnection { peer, connection })) + })); + + Ok(()) + } + + fn accept( + &mut self, + connection_id: ConnectionId, + ) -> crate::Result>> { + let (connection, endpoint) = self + .pending_open + .remove(&connection_id) + .ok_or(Error::ConnectionDoesntExist(connection_id))?; + let bandwidth_sink = self.context.bandwidth_sink.clone(); + let mut protocol_set = self.context.protocol_set(connection_id); + let substream_open_timeout = self.config.substream_open_timeout; + let executor = self.context.executor.clone(); + + tracing::trace!( + target: LOG_TARGET, + ?connection_id, + "start connection", + ); + + let peer = connection.peer; + let endpoint_clone = endpoint.clone(); + + Ok(Box::pin(async move { + // First, notify all protocols about the connection establishment + protocol_set.report_connection_established(peer, endpoint_clone).await?; + + // After protocols are notified, spawn the connection event loop + executor.run(Box::pin(async move { + let _ = QuicConnection::new( + peer, + endpoint, + connection.connection, + protocol_set, + bandwidth_sink, + substream_open_timeout, + ) + .start() + .await; + })); + + Ok(()) + })) + } + + fn reject(&mut self, connection_id: ConnectionId) -> crate::Result<()> { + self.pending_open + .remove(&connection_id) + .map_or(Err(Error::ConnectionDoesntExist(connection_id)), |_| Ok(())) + } + + fn accept_pending(&mut self, connection_id: ConnectionId) -> crate::Result<()> { + let connection = self + .pending_inbound_connections + .remove(&connection_id) + .ok_or(Error::ConnectionDoesntExist(connection_id))?; + + self.on_inbound_connection(connection_id, connection); + + Ok(()) + } + + fn reject_pending(&mut self, connection_id: ConnectionId) -> crate::Result<()> { + self.pending_inbound_connections + .remove(&connection_id) + .map_or(Err(Error::ConnectionDoesntExist(connection_id)), |_| Ok(())) + } + + fn open( + &mut self, + connection_id: ConnectionId, + addresses: Vec, + ) -> crate::Result<()> { + let num_addresses = addresses.len(); + let mut futures: FuturesUnordered<_> = addresses + .into_iter() + .map(|address| { + let keypair = self.context.keypair.clone(); + let connection_open_timeout = self.config.connection_open_timeout; + let addr = address.clone(); + + let future = async move { + let (socket_address, peer) = QuicListener::get_socket_address(&address) + .map_err(DialError::AddressError)?; + let peer = + peer.ok_or_else(|| DialError::AddressError(AddressError::PeerIdMissing))?; + + let crypto_config = + make_client_config(&keypair, Some(peer)).expect("to succeed"); + let quic_client_config = + QuicClientConfig::try_from(crypto_config).expect("valid crypto config"); + let mut transport_config = quinn::TransportConfig::default(); + let timeout = + IdleTimeout::try_from(connection_open_timeout).expect("to succeed"); + transport_config.max_idle_timeout(Some(timeout)); + let mut client_config = ClientConfig::new(Arc::new(quic_client_config)); + client_config.transport_config(Arc::new(transport_config)); + + let client_listen_address = match address.iter().next() { + Some(Protocol::Ip6(_)) => + SocketAddr::new(IpAddr::V6(Ipv6Addr::UNSPECIFIED), 0), + Some(Protocol::Ip4(_)) => + SocketAddr::new(IpAddr::V4(Ipv4Addr::UNSPECIFIED), 0), + _ => return Err(AddressError::InvalidProtocol.into()), + }; + + let client = match Endpoint::client(client_listen_address) { + Ok(client) => client, + Err(error) => { + return Err(DialError::from(error)); + }, + }; + let connection = match client.connect_with(client_config, socket_address, "l") { + Ok(connection) => connection, + Err(error) => return Err(DialError::from(error)), + }; + + let connection = match connection.await { + Ok(connection) => connection, + Err(error) => return Err(DialError::from(error)), + }; + + let Some(peer) = Self::extract_peer_id(&connection) else { + return Err(crate::error::NegotiationError::Quic( + QuicError::InvalidCertificate, + ) + .into()); + }; + + Ok(NegotiatedConnection { peer, connection }) + }; + + async move { future.await.map(|ok| (addr.clone(), ok)).map_err(|err| (addr, err)) } + }) + .collect(); + + // Future that will resolve to the first successful connection. + let future = async move { + let mut errors = Vec::with_capacity(num_addresses); + + while let Some(result) = futures.next().await { + match result { + Ok((address, stream)) => + return RawConnectionResult::Connected { + connection_id, + address, + stream, + errors, + }, + Err(error) => { + tracing::debug!( + target: LOG_TARGET, + ?connection_id, + ?error, + "failed to open connection", + ); + errors.push(error) + }, + } + } + + RawConnectionResult::Failed { connection_id, errors } + }; + + let (fut, handle) = futures::future::abortable(future); + let fut = fut.unwrap_or_else(move |_| RawConnectionResult::Canceled { connection_id }); + self.pending_raw_connections.push(Box::pin(fut)); + self.cancel_futures.insert(connection_id, handle); + + Ok(()) + } + + fn negotiate(&mut self, connection_id: ConnectionId) -> crate::Result<()> { + let (connection, _address) = self + .opened_raw + .remove(&connection_id) + .ok_or(Error::ConnectionDoesntExist(connection_id))?; + + self.pending_connections + .push(Box::pin(async move { (connection_id, Ok(connection)) })); + + Ok(()) + } + + /// Cancel opening connections. + fn cancel(&mut self, connection_id: ConnectionId) { + // Cancel the future if it exists. + // State clean-up happens inside the `poll_next`. + if let Some(handle) = self.cancel_futures.get(&connection_id) { + handle.abort(); + } + } } impl Stream for QuicTransport { - type Item = TransportEvent; - - fn poll_next(mut self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll> { - if let Poll::Ready(Some(connection)) = self.listener.poll_next_unpin(cx) { - let connection_id = self.context.next_connection_id(); - - tracing::trace!( - target: LOG_TARGET, - ?connection_id, - "pending inbound connection", - ); - - self.pending_inbound_connections.insert(connection_id, connection); - - return Poll::Ready(Some(TransportEvent::PendingInboundConnection { - connection_id, - })); - } - - while let Poll::Ready(Some(result)) = self.pending_raw_connections.poll_next_unpin(cx) { - tracing::trace!(target: LOG_TARGET, ?result, "raw connection result"); - - match result { - RawConnectionResult::Connected { - connection_id, - address, - stream, - errors, - } => { - let Some(handle) = self.cancel_futures.remove(&connection_id) else { - tracing::warn!( - target: LOG_TARGET, - ?connection_id, - ?address, - "raw connection without a cancel handle", - ); - continue; - }; - - if !handle.is_aborted() { - self.opened_raw.insert(connection_id, (stream, address.clone())); - - return Poll::Ready(Some(TransportEvent::ConnectionOpened { - connection_id, - address, - errors, - })); - } - } - - RawConnectionResult::Failed { - connection_id, - errors, - } => { - let Some(handle) = self.cancel_futures.remove(&connection_id) else { - tracing::warn!( - target: LOG_TARGET, - ?connection_id, - ?errors, - "raw connection without a cancel handle", - ); - continue; - }; - - if !handle.is_aborted() { - return Poll::Ready(Some(TransportEvent::OpenFailure { - connection_id, - errors, - })); - } - } - - RawConnectionResult::Canceled { connection_id } => { - if self.cancel_futures.remove(&connection_id).is_none() { - tracing::warn!( - target: LOG_TARGET, - ?connection_id, - "raw cancelled connection without a cancel handle", - ); - } - } - } - } - - while let Poll::Ready(Some(connection)) = self.pending_connections.poll_next_unpin(cx) { - let (connection_id, result) = connection; - - match self.on_connection_established(connection_id, result) { - Some(event) => return Poll::Ready(Some(event)), - None => {} - } - } - - Poll::Pending - } + type Item = TransportEvent; + + fn poll_next(mut self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll> { + if let Poll::Ready(Some(connection)) = self.listener.poll_next_unpin(cx) { + let connection_id = self.context.next_connection_id(); + + tracing::trace!( + target: LOG_TARGET, + ?connection_id, + "pending inbound connection", + ); + + self.pending_inbound_connections.insert(connection_id, connection); + + return Poll::Ready(Some(TransportEvent::PendingInboundConnection { connection_id })); + } + + while let Poll::Ready(Some(result)) = self.pending_raw_connections.poll_next_unpin(cx) { + tracing::trace!(target: LOG_TARGET, ?result, "raw connection result"); + + match result { + RawConnectionResult::Connected { connection_id, address, stream, errors } => { + let Some(handle) = self.cancel_futures.remove(&connection_id) else { + tracing::warn!( + target: LOG_TARGET, + ?connection_id, + ?address, + "raw connection without a cancel handle", + ); + continue; + }; + + if !handle.is_aborted() { + self.opened_raw.insert(connection_id, (stream, address.clone())); + + return Poll::Ready(Some(TransportEvent::ConnectionOpened { + connection_id, + address, + errors, + })); + } + }, + + RawConnectionResult::Failed { connection_id, errors } => { + let Some(handle) = self.cancel_futures.remove(&connection_id) else { + tracing::warn!( + target: LOG_TARGET, + ?connection_id, + ?errors, + "raw connection without a cancel handle", + ); + continue; + }; + + if !handle.is_aborted() { + return Poll::Ready(Some(TransportEvent::OpenFailure { + connection_id, + errors, + })); + } + }, + + RawConnectionResult::Canceled { connection_id } => { + if self.cancel_futures.remove(&connection_id).is_none() { + tracing::warn!( + target: LOG_TARGET, + ?connection_id, + "raw cancelled connection without a cancel handle", + ); + } + }, + } + } + + while let Poll::Ready(Some(connection)) = self.pending_connections.poll_next_unpin(cx) { + let (connection_id, result) = connection; + + match self.on_connection_established(connection_id, result) { + Some(event) => return Poll::Ready(Some(event)), + None => {}, + } + } + + Poll::Pending + } } #[cfg(test)] mod tests { - use super::*; - use crate::{ - codec::ProtocolCodec, - crypto::dilithium::Keypair, - executor::DefaultExecutor, - protocol::SubstreamKeepAlive, - transport::manager::{ProtocolContext, TransportHandle}, - types::protocol::ProtocolName, - BandwidthSink, - }; - use multihash::Multihash; - use tokio::sync::mpsc::channel; - - #[tokio::test] - async fn test_quinn() { - let _ = tracing_subscriber::fmt() - .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) - .try_init(); - - let keypair1 = Keypair::generate(); - let (tx1, _rx1) = channel(64); - let (event_tx1, _event_rx1) = channel(64); - - let handle1 = TransportHandle { - executor: Arc::new(DefaultExecutor {}), - next_substream_id: Default::default(), - next_connection_id: Default::default(), - keypair: keypair1.clone(), - tx: event_tx1, - bandwidth_sink: BandwidthSink::new(), - - protocols: HashMap::from_iter([( - ProtocolName::from("/notif/1"), - ProtocolContext { - tx: tx1, - codec: ProtocolCodec::Identity(32), - fallback_names: Vec::new(), - keep_alive: SubstreamKeepAlive::Yes, - }, - )]), - }; - let resolver = Arc::new(TokioResolver::builder_tokio().unwrap().build()); - - let (mut transport1, listen_addresses) = - QuicTransport::new(handle1, Default::default(), resolver.clone()).unwrap(); - let listen_address = listen_addresses[0].clone(); - - let keypair2 = Keypair::generate(); - let (tx2, _rx2) = channel(64); - let (event_tx2, _event_rx2) = channel(64); - - let handle2 = TransportHandle { - executor: Arc::new(DefaultExecutor {}), - next_substream_id: Default::default(), - next_connection_id: Default::default(), - keypair: keypair2.clone(), - tx: event_tx2, - bandwidth_sink: BandwidthSink::new(), - - protocols: HashMap::from_iter([( - ProtocolName::from("/notif/1"), - ProtocolContext { - tx: tx2, - codec: ProtocolCodec::Identity(32), - fallback_names: Vec::new(), - keep_alive: SubstreamKeepAlive::Yes, - }, - )]), - }; - - let (mut transport2, _) = - QuicTransport::new(handle2, Default::default(), resolver).unwrap(); - let peer1: PeerId = PeerId::from_public_key(&keypair1.public().into()); - let _peer2: PeerId = PeerId::from_public_key(&keypair2.public().into()); - let listen_address = listen_address.with(Protocol::P2p( - Multihash::from_bytes(&peer1.to_bytes()).unwrap(), - )); - - transport2.dial(ConnectionId::new(), listen_address).unwrap(); - - let event = transport1.next().await.unwrap(); - match event { - TransportEvent::PendingInboundConnection { connection_id } => { - transport1.accept_pending(connection_id).unwrap(); - } - _ => panic!("unexpected event"), - } - - let (res1, res2) = tokio::join!(transport1.next(), transport2.next()); - - assert!(std::matches!( - res1, - Some(TransportEvent::ConnectionEstablished { .. }) - )); - assert!(std::matches!( - res2, - Some(TransportEvent::ConnectionEstablished { .. }) - )); - } + use super::*; + use crate::{ + codec::ProtocolCodec, + crypto::dilithium::Keypair, + executor::DefaultExecutor, + protocol::SubstreamKeepAlive, + transport::manager::{ProtocolContext, TransportHandle}, + types::protocol::ProtocolName, + BandwidthSink, + }; + use multihash::Multihash; + use tokio::sync::mpsc::channel; + + #[tokio::test] + async fn test_quinn() { + let _ = tracing_subscriber::fmt() + .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) + .try_init(); + + let keypair1 = Keypair::generate(); + let (tx1, _rx1) = channel(64); + let (event_tx1, _event_rx1) = channel(64); + + let handle1 = TransportHandle { + executor: Arc::new(DefaultExecutor {}), + next_substream_id: Default::default(), + next_connection_id: Default::default(), + keypair: keypair1.clone(), + tx: event_tx1, + bandwidth_sink: BandwidthSink::new(), + + protocols: HashMap::from_iter([( + ProtocolName::from("/notif/1"), + ProtocolContext { + tx: tx1, + codec: ProtocolCodec::Identity(32), + fallback_names: Vec::new(), + keep_alive: SubstreamKeepAlive::Yes, + }, + )]), + }; + let resolver = Arc::new(TokioResolver::builder_tokio().unwrap().build()); + + let (mut transport1, listen_addresses) = + QuicTransport::new(handle1, Default::default(), resolver.clone()).unwrap(); + let listen_address = listen_addresses[0].clone(); + + let keypair2 = Keypair::generate(); + let (tx2, _rx2) = channel(64); + let (event_tx2, _event_rx2) = channel(64); + + let handle2 = TransportHandle { + executor: Arc::new(DefaultExecutor {}), + next_substream_id: Default::default(), + next_connection_id: Default::default(), + keypair: keypair2.clone(), + tx: event_tx2, + bandwidth_sink: BandwidthSink::new(), + + protocols: HashMap::from_iter([( + ProtocolName::from("/notif/1"), + ProtocolContext { + tx: tx2, + codec: ProtocolCodec::Identity(32), + fallback_names: Vec::new(), + keep_alive: SubstreamKeepAlive::Yes, + }, + )]), + }; + + let (mut transport2, _) = + QuicTransport::new(handle2, Default::default(), resolver).unwrap(); + let peer1: PeerId = PeerId::from_public_key(&keypair1.public().into()); + let _peer2: PeerId = PeerId::from_public_key(&keypair2.public().into()); + let listen_address = + listen_address.with(Protocol::P2p(Multihash::from_bytes(&peer1.to_bytes()).unwrap())); + + transport2.dial(ConnectionId::new(), listen_address).unwrap(); + + let event = transport1.next().await.unwrap(); + match event { + TransportEvent::PendingInboundConnection { connection_id } => { + transport1.accept_pending(connection_id).unwrap(); + }, + _ => panic!("unexpected event"), + } + + let (res1, res2) = tokio::join!(transport1.next(), transport2.next()); + + assert!(std::matches!(res1, Some(TransportEvent::ConnectionEstablished { .. }))); + assert!(std::matches!(res2, Some(TransportEvent::ConnectionEstablished { .. }))); + } } diff --git a/client/litep2p/src/transport/quic/substream.rs b/client/litep2p/src/transport/quic/substream.rs index 294b796a..54e570fb 100644 --- a/client/litep2p/src/transport/quic/substream.rs +++ b/client/litep2p/src/transport/quic/substream.rs @@ -27,9 +27,9 @@ use tokio::io::{AsyncRead as TokioAsyncRead, AsyncWrite as TokioAsyncWrite}; use tokio_util::compat::{Compat, TokioAsyncReadCompatExt, TokioAsyncWriteCompatExt}; use std::{ - io, - pin::Pin, - task::{Context, Poll}, + io, + pin::Pin, + task::{Context, Poll}, }; use crate::protocol::Permit; @@ -37,138 +37,133 @@ use crate::protocol::Permit; /// QUIC substream. #[derive(Debug)] pub struct Substream { - _lifetime_permit: Option, - bandwidth_sink: BandwidthSink, - send_stream: SendStream, - recv_stream: RecvStream, + _lifetime_permit: Option, + bandwidth_sink: BandwidthSink, + send_stream: SendStream, + recv_stream: RecvStream, } impl Substream { - /// Create new [`Substream`]. - pub fn new( - _lifetime_permit: Option, - send_stream: SendStream, - recv_stream: RecvStream, - bandwidth_sink: BandwidthSink, - ) -> Self { - Self { - _lifetime_permit, - send_stream, - recv_stream, - bandwidth_sink, - } - } - - /// Write `buffers` to the underlying socket. - pub async fn write_all_chunks(&mut self, buffers: &mut [Bytes]) -> Result<(), SubstreamError> { - let nwritten = buffers.iter().fold(0usize, |acc, buffer| acc + buffer.len()); - - match self - .send_stream - .write_all_chunks(buffers) - .await - .map_err(|_| SubstreamError::ConnectionClosed) - { - Ok(()) => { - self.bandwidth_sink.increase_outbound(nwritten); - Ok(()) - } - Err(error) => Err(error), - } - } + /// Create new [`Substream`]. + pub fn new( + _lifetime_permit: Option, + send_stream: SendStream, + recv_stream: RecvStream, + bandwidth_sink: BandwidthSink, + ) -> Self { + Self { _lifetime_permit, send_stream, recv_stream, bandwidth_sink } + } + + /// Write `buffers` to the underlying socket. + pub async fn write_all_chunks(&mut self, buffers: &mut [Bytes]) -> Result<(), SubstreamError> { + let nwritten = buffers.iter().fold(0usize, |acc, buffer| acc + buffer.len()); + + match self + .send_stream + .write_all_chunks(buffers) + .await + .map_err(|_| SubstreamError::ConnectionClosed) + { + Ok(()) => { + self.bandwidth_sink.increase_outbound(nwritten); + Ok(()) + }, + Err(error) => Err(error), + } + } } impl TokioAsyncRead for Substream { - fn poll_read( - mut self: Pin<&mut Self>, - cx: &mut Context<'_>, - buf: &mut tokio::io::ReadBuf<'_>, - ) -> Poll> { - match futures::ready!(Pin::new(&mut self.recv_stream).poll_read(cx, buf)) { - Err(error) => Poll::Ready(Err(error)), - Ok(res) => { - self.bandwidth_sink.increase_inbound(buf.filled().len()); - Poll::Ready(Ok(res)) - } - } - } + fn poll_read( + mut self: Pin<&mut Self>, + cx: &mut Context<'_>, + buf: &mut tokio::io::ReadBuf<'_>, + ) -> Poll> { + match futures::ready!(Pin::new(&mut self.recv_stream).poll_read(cx, buf)) { + Err(error) => Poll::Ready(Err(error)), + Ok(res) => { + self.bandwidth_sink.increase_inbound(buf.filled().len()); + Poll::Ready(Ok(res)) + }, + } + } } impl TokioAsyncWrite for Substream { - fn poll_write( - mut self: Pin<&mut Self>, - cx: &mut Context<'_>, - buf: &[u8], - ) -> Poll> { - match futures::ready!(Pin::new(&mut self.send_stream).poll_write(cx, buf)) { - Err(error) => Poll::Ready(Err(error.into())), - Ok(nwritten) => { - self.bandwidth_sink.increase_outbound(nwritten); - Poll::Ready(Ok(nwritten)) - } - } - } - - fn poll_flush(mut self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll> { - Pin::new(&mut self.send_stream).poll_flush(cx).map_err(Into::into) - } - - fn poll_shutdown( - mut self: Pin<&mut Self>, - cx: &mut Context<'_>, - ) -> Poll> { - Pin::new(&mut self.send_stream).poll_shutdown(cx).map_err(Into::into) - } + fn poll_write( + mut self: Pin<&mut Self>, + cx: &mut Context<'_>, + buf: &[u8], + ) -> Poll> { + match futures::ready!(Pin::new(&mut self.send_stream).poll_write(cx, buf)) { + Err(error) => Poll::Ready(Err(error.into())), + Ok(nwritten) => { + self.bandwidth_sink.increase_outbound(nwritten); + Poll::Ready(Ok(nwritten)) + }, + } + } + + fn poll_flush(mut self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll> { + Pin::new(&mut self.send_stream).poll_flush(cx).map_err(Into::into) + } + + fn poll_shutdown( + mut self: Pin<&mut Self>, + cx: &mut Context<'_>, + ) -> Poll> { + Pin::new(&mut self.send_stream).poll_shutdown(cx).map_err(Into::into) + } } /// Substream pair used to negotiate a protocol for the connection. pub struct NegotiatingSubstream { - recv_stream: Compat, - send_stream: Compat, + recv_stream: Compat, + send_stream: Compat, } impl NegotiatingSubstream { - /// Create new [`NegotiatingSubstream`]. - pub fn new(send_stream: SendStream, recv_stream: RecvStream) -> Self { - Self { - recv_stream: TokioAsyncReadCompatExt::compat(recv_stream), - send_stream: TokioAsyncWriteCompatExt::compat_write(send_stream), - } - } - - /// Deconstruct [`NegotiatingSubstream`] into parts. - pub fn into_parts(self) -> (SendStream, RecvStream) { - let sender = self.send_stream.into_inner(); - let receiver = self.recv_stream.into_inner(); - - (sender, receiver) - } + /// Create new [`NegotiatingSubstream`]. + pub fn new(send_stream: SendStream, recv_stream: RecvStream) -> Self { + Self { + recv_stream: TokioAsyncReadCompatExt::compat(recv_stream), + send_stream: TokioAsyncWriteCompatExt::compat_write(send_stream), + } + } + + /// Deconstruct [`NegotiatingSubstream`] into parts. + pub fn into_parts(self) -> (SendStream, RecvStream) { + let sender = self.send_stream.into_inner(); + let receiver = self.recv_stream.into_inner(); + + (sender, receiver) + } } impl AsyncRead for NegotiatingSubstream { - fn poll_read( - mut self: Pin<&mut Self>, - cx: &mut Context<'_>, - buf: &mut [u8], - ) -> Poll> { - Pin::new(&mut self.recv_stream).poll_read(cx, buf) - } + fn poll_read( + mut self: Pin<&mut Self>, + cx: &mut Context<'_>, + buf: &mut [u8], + ) -> Poll> { + Pin::new(&mut self.recv_stream).poll_read(cx, buf) + } } impl AsyncWrite for NegotiatingSubstream { - fn poll_write( - mut self: Pin<&mut Self>, - cx: &mut Context<'_>, - buf: &[u8], - ) -> Poll> { - Pin::new(&mut self.send_stream).poll_write(cx, buf) - } - - fn poll_flush(mut self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll> { - Pin::new(&mut self.send_stream).poll_flush(cx) - } - - fn poll_close(mut self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll> { - Pin::new(&mut self.send_stream).poll_close(cx) - } + fn poll_write( + mut self: Pin<&mut Self>, + cx: &mut Context<'_>, + buf: &[u8], + ) -> Poll> { + Pin::new(&mut self.send_stream).poll_write(cx, buf) + } + + fn poll_flush(mut self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll> { + Pin::new(&mut self.send_stream).poll_flush(cx) + } + + fn poll_close(mut self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll> { + Pin::new(&mut self.send_stream).poll_close(cx) + } } diff --git a/client/litep2p/src/transport/tcp/config.rs b/client/litep2p/src/transport/tcp/config.rs index 3fe11409..49d262be 100644 --- a/client/litep2p/src/transport/tcp/config.rs +++ b/client/litep2p/src/transport/tcp/config.rs @@ -21,89 +21,89 @@ //! TCP transport configuration. use crate::{ - crypto::noise::{MAX_READ_AHEAD_FACTOR, MAX_WRITE_BUFFER_SIZE}, - transport::{CONNECTION_OPEN_TIMEOUT, MAX_PARALLEL_DIALS, SUBSTREAM_OPEN_TIMEOUT}, + crypto::noise::{MAX_READ_AHEAD_FACTOR, MAX_WRITE_BUFFER_SIZE}, + transport::{CONNECTION_OPEN_TIMEOUT, MAX_PARALLEL_DIALS, SUBSTREAM_OPEN_TIMEOUT}, }; /// TCP transport configuration. #[derive(Debug, Clone)] pub struct Config { - /// Listen address for the transport. - /// - /// Default listen addresses are ["/ip4/0.0.0.0/tcp/0", "/ip6/::/tcp/0"]. - pub listen_addresses: Vec, + /// Listen address for the transport. + /// + /// Default listen addresses are ["/ip4/0.0.0.0/tcp/0", "/ip6/::/tcp/0"]. + pub listen_addresses: Vec, - /// Whether to set `SO_REUSEPORT` and bind a socket to the listen address port for outbound - /// connections. - /// - /// Note that `SO_REUSEADDR` is always set on listening sockets. - /// - /// Defaults to `true`. - pub reuse_port: bool, + /// Whether to set `SO_REUSEPORT` and bind a socket to the listen address port for outbound + /// connections. + /// + /// Note that `SO_REUSEADDR` is always set on listening sockets. + /// + /// Defaults to `true`. + pub reuse_port: bool, - /// Enable `TCP_NODELAY`. - /// - /// Defaults to `false`. - pub nodelay: bool, + /// Enable `TCP_NODELAY`. + /// + /// Defaults to `false`. + pub nodelay: bool, - /// Yamux configuration. - pub yamux_config: crate::yamux::Config, + /// Yamux configuration. + pub yamux_config: crate::yamux::Config, - /// Noise read-ahead frame count. - /// - /// Specifies how many Noise frames are read per call to the underlying socket. - /// - /// By default this is configured to `5` so each call to the underlying socket can read up - /// to `5` Noise frame per call. Fewer frames may be read if there isn't enough data in the - /// socket. Each Noise frame is `65 KB` so the default setting allocates `65 KB * 5 = 325 KB` - /// per connection. - pub noise_read_ahead_frame_count: usize, + /// Noise read-ahead frame count. + /// + /// Specifies how many Noise frames are read per call to the underlying socket. + /// + /// By default this is configured to `5` so each call to the underlying socket can read up + /// to `5` Noise frame per call. Fewer frames may be read if there isn't enough data in the + /// socket. Each Noise frame is `65 KB` so the default setting allocates `65 KB * 5 = 325 KB` + /// per connection. + pub noise_read_ahead_frame_count: usize, - /// Noise write buffer size. - /// - /// Specifes how many Noise frames are tried to be coalesced into a single system call. - /// By default the value is set to `2` which means that the `NoiseSocket` will allocate - /// `130 KB` for each outgoing connection. - /// - /// The write buffer size is separate from the read-ahead frame count so by default - /// the Noise code will allocate `2 * 65 KB + 5 * 65 KB = 455 KB` per connection. - pub noise_write_buffer_size: usize, + /// Noise write buffer size. + /// + /// Specifes how many Noise frames are tried to be coalesced into a single system call. + /// By default the value is set to `2` which means that the `NoiseSocket` will allocate + /// `130 KB` for each outgoing connection. + /// + /// The write buffer size is separate from the read-ahead frame count so by default + /// the Noise code will allocate `2 * 65 KB + 5 * 65 KB = 455 KB` per connection. + pub noise_write_buffer_size: usize, - /// Connection open timeout. - /// - /// How long should litep2p wait for a connection to be opened before the host - /// is deemed unreachable. - pub connection_open_timeout: std::time::Duration, + /// Connection open timeout. + /// + /// How long should litep2p wait for a connection to be opened before the host + /// is deemed unreachable. + pub connection_open_timeout: std::time::Duration, - /// Substream open timeout. - /// - /// How long should litep2p wait for a substream to be opened before considering - /// the substream rejected. - pub substream_open_timeout: std::time::Duration, + /// Substream open timeout. + /// + /// How long should litep2p wait for a substream to be opened before considering + /// the substream rejected. + pub substream_open_timeout: std::time::Duration, - /// Maximum number of parallel dial attempts for a single peer. - /// - /// **Note:** This value is overridden by the top-level - /// [`ConfigBuilder::with_max_parallel_dials`](crate::config::ConfigBuilder::with_max_parallel_dials) - /// when building `Litep2p`. - pub max_parallel_dials: usize, + /// Maximum number of parallel dial attempts for a single peer. + /// + /// **Note:** This value is overridden by the top-level + /// [`ConfigBuilder::with_max_parallel_dials`](crate::config::ConfigBuilder::with_max_parallel_dials) + /// when building `Litep2p`. + pub max_parallel_dials: usize, } impl Default for Config { - fn default() -> Self { - Self { - listen_addresses: vec![ - "/ip4/0.0.0.0/tcp/0".parse().expect("valid address"), - "/ip6/::/tcp/0".parse().expect("valid address"), - ], - reuse_port: true, - nodelay: false, - yamux_config: Default::default(), - noise_read_ahead_frame_count: MAX_READ_AHEAD_FACTOR, - noise_write_buffer_size: MAX_WRITE_BUFFER_SIZE, - connection_open_timeout: CONNECTION_OPEN_TIMEOUT, - substream_open_timeout: SUBSTREAM_OPEN_TIMEOUT, - max_parallel_dials: MAX_PARALLEL_DIALS, - } - } + fn default() -> Self { + Self { + listen_addresses: vec![ + "/ip4/0.0.0.0/tcp/0".parse().expect("valid address"), + "/ip6/::/tcp/0".parse().expect("valid address"), + ], + reuse_port: true, + nodelay: false, + yamux_config: Default::default(), + noise_read_ahead_frame_count: MAX_READ_AHEAD_FACTOR, + noise_write_buffer_size: MAX_WRITE_BUFFER_SIZE, + connection_open_timeout: CONNECTION_OPEN_TIMEOUT, + substream_open_timeout: SUBSTREAM_OPEN_TIMEOUT, + max_parallel_dials: MAX_PARALLEL_DIALS, + } + } } diff --git a/client/litep2p/src/transport/tcp/connection.rs b/client/litep2p/src/transport/tcp/connection.rs index 0634dbbd..3befc028 100644 --- a/client/litep2p/src/transport/tcp/connection.rs +++ b/client/litep2p/src/transport/tcp/connection.rs @@ -19,45 +19,45 @@ // DEALINGS IN THE SOFTWARE. use crate::{ - config::Role, - crypto::{ - dilithium::Keypair, - noise::{self, NoiseSocket}, - }, - error::{Error, NegotiationError, SubstreamError}, - multistream_select::{dialer_select_proto, listener_select_proto, Negotiated, Version}, - protocol::{Direction, Permit, ProtocolCommand, ProtocolSet, SubstreamKeepAlive}, - substream, - transport::{ - common::listener::{AddressType, DnsType}, - tcp::substream::Substream, - Endpoint, - }, - types::{protocol::ProtocolName, ConnectionId, SubstreamId}, - BandwidthSink, PeerId, + config::Role, + crypto::{ + dilithium::Keypair, + noise::{self, NoiseSocket}, + }, + error::{Error, NegotiationError, SubstreamError}, + multistream_select::{dialer_select_proto, listener_select_proto, Negotiated, Version}, + protocol::{Direction, Permit, ProtocolCommand, ProtocolSet, SubstreamKeepAlive}, + substream, + transport::{ + common::listener::{AddressType, DnsType}, + tcp::substream::Substream, + Endpoint, + }, + types::{protocol::ProtocolName, ConnectionId, SubstreamId}, + BandwidthSink, PeerId, }; use futures::{ - future::BoxFuture, - stream::{FuturesUnordered, StreamExt}, - AsyncRead, AsyncWrite, + future::BoxFuture, + stream::{FuturesUnordered, StreamExt}, + AsyncRead, AsyncWrite, }; use multiaddr::{Multiaddr, Protocol}; use tokio::net::TcpStream; use tokio_util::compat::{ - Compat, FuturesAsyncReadCompatExt, TokioAsyncReadCompatExt, TokioAsyncWriteCompatExt, + Compat, FuturesAsyncReadCompatExt, TokioAsyncReadCompatExt, TokioAsyncWriteCompatExt, }; use std::{ - borrow::Cow, - collections::HashMap, - fmt, - net::SocketAddr, - sync::{ - atomic::{AtomicUsize, Ordering}, - Arc, - }, - time::Duration, + borrow::Cow, + collections::HashMap, + fmt, + net::SocketAddr, + sync::{ + atomic::{AtomicUsize, Ordering}, + Arc, + }, + time::Duration, }; /// Logging target for the file. @@ -65,1392 +65,1366 @@ const LOG_TARGET: &str = "litep2p::tcp::connection"; #[derive(Debug)] pub struct NegotiatedSubstream { - /// Substream direction. - direction: Direction, + /// Substream direction. + direction: Direction, - /// Substream ID. - substream_id: SubstreamId, + /// Substream ID. + substream_id: SubstreamId, - /// Protocol name. - protocol: ProtocolName, + /// Protocol name. + protocol: ProtocolName, - /// Yamux substream. - io: crate::yamux::Stream, + /// Yamux substream. + io: crate::yamux::Stream, - /// Permit held until the negotiated substream is reported back to - /// [`TransportService`](crate::protocol::TransportService) and connection upgraded. - permit: Permit, + /// Permit held until the negotiated substream is reported back to + /// [`TransportService`](crate::protocol::TransportService) and connection upgraded. + permit: Permit, - /// Whether to store the permit as long as substream exists. - keep_alive: SubstreamKeepAlive, + /// Whether to store the permit as long as substream exists. + keep_alive: SubstreamKeepAlive, } /// TCP connection error. #[derive(Debug)] enum ConnectionError { - /// Timeout - Timeout { - /// Protocol. - protocol: Option, - - /// Substream ID. - substream_id: Option, - }, - - /// Failed to negotiate connection/substream. - FailedToNegotiate { - /// Protocol. - protocol: Option, - - /// Substream ID. - substream_id: Option, - - /// Error. - error: SubstreamError, - }, + /// Timeout + Timeout { + /// Protocol. + protocol: Option, + + /// Substream ID. + substream_id: Option, + }, + + /// Failed to negotiate connection/substream. + FailedToNegotiate { + /// Protocol. + protocol: Option, + + /// Substream ID. + substream_id: Option, + + /// Error. + error: SubstreamError, + }, } /// Connection context for an opened connection that hasn't yet started its event loop. pub struct NegotiatedConnection { - /// Yamux connection. - connection: crate::yamux::ControlledConnection>>, + /// Yamux connection. + connection: crate::yamux::ControlledConnection>>, - /// Yamux control. - control: crate::yamux::Control, + /// Yamux control. + control: crate::yamux::Control, - /// Remote peer ID. - peer: PeerId, + /// Remote peer ID. + peer: PeerId, - /// Endpoint. - endpoint: Endpoint, + /// Endpoint. + endpoint: Endpoint, - /// Substream open timeout. - substream_open_timeout: Duration, + /// Substream open timeout. + substream_open_timeout: Duration, } impl std::fmt::Debug for NegotiatedConnection { - fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { - f.debug_struct("NegotiatedConnection") - .field("peer", &self.peer) - .field("endpoint", &self.endpoint) - .finish() - } + fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { + f.debug_struct("NegotiatedConnection") + .field("peer", &self.peer) + .field("endpoint", &self.endpoint) + .finish() + } } impl NegotiatedConnection { - /// Get `ConnectionId` of the negotiated connection. - pub fn connection_id(&self) -> ConnectionId { - self.endpoint.connection_id() - } - - /// Get `PeerId` of the negotiated connection. - pub fn peer(&self) -> PeerId { - self.peer - } - - /// Get `Endpoint` of the negotiated connection. - pub fn endpoint(&self) -> Endpoint { - self.endpoint.clone() - } + /// Get `ConnectionId` of the negotiated connection. + pub fn connection_id(&self) -> ConnectionId { + self.endpoint.connection_id() + } + + /// Get `PeerId` of the negotiated connection. + pub fn peer(&self) -> PeerId { + self.peer + } + + /// Get `Endpoint` of the negotiated connection. + pub fn endpoint(&self) -> Endpoint { + self.endpoint.clone() + } } /// TCP connection. pub struct TcpConnection { - /// Protocol context. - protocol_set: ProtocolSet, + /// Protocol context. + protocol_set: ProtocolSet, - /// Yamux connection. - connection: crate::yamux::ControlledConnection>>, + /// Yamux connection. + connection: crate::yamux::ControlledConnection>>, - /// Yamux control. - control: crate::yamux::Control, + /// Yamux control. + control: crate::yamux::Control, - /// Remote peer ID. - peer: PeerId, + /// Remote peer ID. + peer: PeerId, - /// Endpoint. - endpoint: Endpoint, + /// Endpoint. + endpoint: Endpoint, - /// Substream open timeout. - substream_open_timeout: Duration, + /// Substream open timeout. + substream_open_timeout: Duration, - /// Next substream ID. - next_substream_id: Arc, + /// Next substream ID. + next_substream_id: Arc, - // Bandwidth sink. - bandwidth_sink: BandwidthSink, + // Bandwidth sink. + bandwidth_sink: BandwidthSink, - /// Pending substreams. - pending_substreams: - FuturesUnordered>>, + /// Pending substreams. + pending_substreams: + FuturesUnordered>>, } impl fmt::Debug for TcpConnection { - fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { - f.debug_struct("TcpConnection") - .field("peer", &self.peer) - .field("next_substream_id", &self.next_substream_id) - .finish() - } + fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { + f.debug_struct("TcpConnection") + .field("peer", &self.peer) + .field("next_substream_id", &self.next_substream_id) + .finish() + } } impl TcpConnection { - /// Create new [`TcpConnection`] from [`NegotiatedConnection`]. - pub(super) fn new( - context: NegotiatedConnection, - protocol_set: ProtocolSet, - bandwidth_sink: BandwidthSink, - next_substream_id: Arc, - ) -> Self { - let NegotiatedConnection { - connection, - control, - peer, - endpoint, - substream_open_timeout, - } = context; - - Self { - protocol_set, - connection, - control, - peer, - endpoint, - bandwidth_sink, - next_substream_id, - pending_substreams: FuturesUnordered::new(), - substream_open_timeout, - } - } - - /// Open connection to remote peer at `address`. - // TODO: https://github.com/paritytech/litep2p/issues/347 this function can be removed - pub(super) async fn open_connection( - connection_id: ConnectionId, - keypair: Keypair, - stream: TcpStream, - address: AddressType, - peer: Option, - yamux_config: crate::yamux::Config, - max_read_ahead_factor: usize, - max_write_buffer_size: usize, - connection_open_timeout: Duration, - substream_open_timeout: Duration, - ) -> Result { - tracing::debug!( - target: LOG_TARGET, - ?address, - ?peer, - "open connection to remote peer", - ); - - match tokio::time::timeout(connection_open_timeout, async move { - Self::negotiate_connection( - stream, - peer, - connection_id, - keypair, - Role::Dialer, - address, - yamux_config, - max_read_ahead_factor, - max_write_buffer_size, - substream_open_timeout, - ) - .await - }) - .await - { - Err(_) => { - tracing::trace!(target: LOG_TARGET, ?connection_id, "connection timed out during negotiation"); - Err(NegotiationError::Timeout) - } - Ok(result) => result, - } - } - - /// Open substream for `protocol`. - pub(super) async fn open_substream( - mut control: crate::yamux::Control, - substream_id: SubstreamId, - permit: Permit, - keep_alive: SubstreamKeepAlive, - protocol: ProtocolName, - fallback_names: Vec, - open_timeout: Duration, - ) -> Result { - tracing::debug!(target: LOG_TARGET, ?protocol, ?substream_id, "open substream"); - - let stream = match control.open_stream().await { - Ok(stream) => { - tracing::trace!(target: LOG_TARGET, ?substream_id, "substream opened"); - stream - } - Err(error) => { - tracing::debug!( - target: LOG_TARGET, - ?substream_id, - ?error, - "failed to open substream" - ); - return Err(SubstreamError::YamuxError( - error, - Direction::Outbound(substream_id), - )); - } - }; - - // TODO: https://github.com/paritytech/litep2p/issues/346 protocols don't change after - // they've been initialized so this should be done only once - let protocols = std::iter::once(&*protocol) - .chain(fallback_names.iter().map(|protocol| &**protocol)) - .collect(); - - let (io, protocol) = - Self::negotiate_protocol(stream, &Role::Dialer, protocols, open_timeout).await?; - - Ok(NegotiatedSubstream { - io: io.inner(), - substream_id, - direction: Direction::Outbound(substream_id), - protocol, - permit, - keep_alive, - }) - } - - /// Accept a new connection. - pub(super) async fn accept_connection( - stream: TcpStream, - connection_id: ConnectionId, - keypair: Keypair, - address: SocketAddr, - yamux_config: crate::yamux::Config, - max_read_ahead_factor: usize, - max_write_buffer_size: usize, - connection_open_timeout: Duration, - substream_open_timeout: Duration, - ) -> Result { - tracing::debug!(target: LOG_TARGET, ?address, "accept connection"); - - match tokio::time::timeout(connection_open_timeout, async move { - Self::negotiate_connection( - stream, - None, - connection_id, - keypair, - Role::Listener, - AddressType::Socket(address), - yamux_config, - max_read_ahead_factor, - max_write_buffer_size, - substream_open_timeout, - ) - .await - }) - .await - { - Err(_) => Err(NegotiationError::Timeout), - Ok(result) => result, - } - } - - /// Accept substream. - pub(super) async fn accept_substream( - stream: crate::yamux::Stream, - permit: Permit, - substream_id: SubstreamId, - protocols: HashMap, - open_timeout: Duration, - ) -> Result { - tracing::trace!( - target: LOG_TARGET, - ?substream_id, - "accept inbound substream", - ); - - let protocol_names = protocols.keys().map(|protocol| &**protocol).collect::>(); - let (io, protocol) = - Self::negotiate_protocol(stream, &Role::Listener, protocol_names, open_timeout).await?; - let keep_alive = *protocols.get(&protocol).expect("protocol to be one of the keys"); - - tracing::trace!( - target: LOG_TARGET, - ?substream_id, - "substream accepted and negotiated", - ); - - Ok(NegotiatedSubstream { - io: io.inner(), - substream_id, - direction: Direction::Inbound, - protocol, - permit, - keep_alive, - }) - } - - /// Negotiate protocol. - async fn negotiate_protocol( - stream: S, - role: &Role, - protocols: Vec<&str>, - substream_open_timeout: Duration, - ) -> Result<(Negotiated, ProtocolName), NegotiationError> { - tracing::trace!(target: LOG_TARGET, ?protocols, "negotiating protocols"); - - match tokio::time::timeout(substream_open_timeout, async move { - match role { - Role::Dialer => dialer_select_proto(stream, protocols, Version::V1).await, - Role::Listener => listener_select_proto(stream, protocols).await, - } - }) - .await - { - Err(_) => Err(NegotiationError::Timeout), - Ok(Err(error)) => Err(NegotiationError::MultistreamSelectError(error)), - Ok(Ok((protocol, socket))) => { - tracing::trace!(target: LOG_TARGET, ?protocol, "protocol negotiated"); - - Ok((socket, ProtocolName::from(protocol.to_string()))) - } - } - } - - /// Negotiate noise + yamux for the connection. - pub(super) async fn negotiate_connection( - stream: TcpStream, - dialed_peer: Option, - connection_id: ConnectionId, - keypair: Keypair, - role: Role, - address: AddressType, - yamux_config: crate::yamux::Config, - max_read_ahead_factor: usize, - max_write_buffer_size: usize, - substream_open_timeout: Duration, - ) -> Result { - tracing::trace!( - target: LOG_TARGET, - ?role, - "negotiate connection", - ); - - let stream = TokioAsyncReadCompatExt::compat(stream).into_inner(); - let stream = TokioAsyncWriteCompatExt::compat_write(stream); - - // negotiate `noise` - let (stream, _) = - Self::negotiate_protocol(stream, &role, vec!["/noise"], substream_open_timeout).await?; - - tracing::trace!( - target: LOG_TARGET, - "`multistream-select` and `noise` negotiated", - ); - - // perform noise handshake - let (stream, peer) = noise::handshake( - stream.inner(), - &keypair, - role, - max_read_ahead_factor, - max_write_buffer_size, - substream_open_timeout, - noise::HandshakeTransport::Tcp, - ) - .await?; - - if let Some(dialed_peer) = dialed_peer { - if dialed_peer != peer { - tracing::debug!(target: LOG_TARGET, ?dialed_peer, ?peer, "peer id mismatch"); - return Err(NegotiationError::PeerIdMismatch(dialed_peer, peer)); - } - } - - tracing::trace!(target: LOG_TARGET, "noise handshake done"); - let stream: NoiseSocket> = stream; - - // negotiate `yamux` - let (stream, _) = - Self::negotiate_protocol(stream, &role, vec!["/yamux/1.0.0"], substream_open_timeout) - .await?; - tracing::trace!(target: LOG_TARGET, "`yamux` negotiated"); - - let connection = crate::yamux::Connection::new(stream.inner(), yamux_config, role.into()); - let (control, connection) = crate::yamux::Control::new(connection); - - let address = match address { - AddressType::Socket(address) => Multiaddr::empty() - .with(Protocol::from(address.ip())) - .with(Protocol::Tcp(address.port())), - AddressType::Dns { - address, - port, - dns_type, - } => match dns_type { - DnsType::Dns => Multiaddr::empty() - .with(Protocol::Dns(Cow::Owned(address))) - .with(Protocol::Tcp(port)), - DnsType::Dns4 => Multiaddr::empty() - .with(Protocol::Dns4(Cow::Owned(address))) - .with(Protocol::Tcp(port)), - DnsType::Dns6 => Multiaddr::empty() - .with(Protocol::Dns6(Cow::Owned(address))) - .with(Protocol::Tcp(port)), - }, - }; - let endpoint = match role { - Role::Dialer => Endpoint::dialer(address, connection_id), - Role::Listener => Endpoint::listener(address, connection_id), - }; - - Ok(NegotiatedConnection { - peer, - control, - connection, - endpoint, - substream_open_timeout, - }) - } - - /// Handles the yamux substream. - /// - /// Returns `true` if the connection handler should exit. - async fn handle_yamux_substream( - &mut self, - substream: Option>, - ) -> crate::Result { - match substream { - Some(Ok(stream)) => { - let substream_id = { - let substream_id = self.next_substream_id.fetch_add(1usize, Ordering::Relaxed); - SubstreamId::from(substream_id) - }; - let protocols = self.protocol_set.protocols_with_keep_alives(); - // This permit will be passed on until the substream is reported to the - // [`TransportService`](crate::protocol::TransportService), where the connection - // will be upgraded and the permit won't be needed anymore. - let permit = self.protocol_set.try_get_permit().ok_or(Error::ConnectionClosed)?; - let open_timeout = self.substream_open_timeout; - - self.pending_substreams.push(Box::pin(async move { - match tokio::time::timeout( - open_timeout, - Self::accept_substream( - stream, - permit, - substream_id, - protocols, - open_timeout, - ), - ) - .await - { - Ok(Ok(substream)) => Ok(substream), - Ok(Err(error)) => Err(ConnectionError::FailedToNegotiate { - protocol: None, - substream_id: None, - error: SubstreamError::NegotiationError(error), - }), - Err(_) => Err(ConnectionError::Timeout { - protocol: None, - substream_id: None, - }), - } - })); - - Ok(false) - } - Some(Err(error)) => { - tracing::debug!( - target: LOG_TARGET, - peer = ?self.peer, - ?error, - "connection closed with error", - ); - - self.protocol_set - .report_connection_closed(self.peer, self.endpoint.connection_id()) - .await?; - Ok(true) - } - None => { - tracing::debug!(target: LOG_TARGET, peer = ?self.peer, "connection closed"); - self.protocol_set - .report_connection_closed(self.peer, self.endpoint.connection_id()) - .await?; - Ok(true) - } - } - } - - /// Handles negotiated substream results. - async fn handle_negotiated_substream( - &mut self, - result: Result, - ) -> crate::Result<()> { - match result { - Err(error) => { - tracing::debug!( - target: LOG_TARGET, - ?error, - "failed to accept/open substream", - ); - - let (protocol, substream_id, error) = match error { - ConnectionError::Timeout { - protocol, - substream_id, - } => ( - protocol, - substream_id, - SubstreamError::NegotiationError(NegotiationError::Timeout), - ), - ConnectionError::FailedToNegotiate { - protocol, - substream_id, - error, - } => (protocol, substream_id, error), - }; - - match (protocol, substream_id) { - (Some(protocol), Some(substream_id)) => { - self.protocol_set - .report_substream_open_failure(protocol.clone(), substream_id, error) - .await - .inspect_err(|error| { - tracing::error!( - target: LOG_TARGET, - ?protocol, - endpoint = ?self.endpoint, - ?error, - "failed to register substream open failure to protocol" - ); - })?; - } - _ => {} - } - } - Ok(substream) => { - let protocol = substream.protocol.clone(); - let direction = substream.direction; - let substream_id = substream.substream_id; - let socket = FuturesAsyncReadCompatExt::compat(substream.io); - let bandwidth_sink = self.bandwidth_sink.clone(); - let opening_permit = substream.permit; - let lifetime_permit = substream.keep_alive.then(|| opening_permit.clone()); - - let substream = substream::Substream::new_tcp( - self.peer, - substream_id, - Substream::new(socket, bandwidth_sink, lifetime_permit), - self.protocol_set.protocol_codec(&protocol), - ); - - self.protocol_set - .report_substream_open( - self.peer, - protocol.clone(), - direction, - substream, - opening_permit, - ) - .await - .inspect_err(|error| { - tracing::error!( - target: LOG_TARGET, - ?protocol, - peer = ?self.peer, - endpoint = ?self.endpoint, - ?error, - "failed to register opened substream to protocol", - ); - })?; - } - } - - Ok(()) - } - - /// Handles protocol command. - /// - /// Returns `true` if the connection handler should exit. - async fn handle_protocol_command( - &mut self, - command: Option, - ) -> crate::Result { - match command { - Some(ProtocolCommand::OpenSubstream { - protocol, - fallback_names, - substream_id, - connection_id, - permit, - keep_alive, - }) => { - let control = self.control.clone(); - let open_timeout = self.substream_open_timeout; - - tracing::trace!( - target: LOG_TARGET, - ?protocol, - ?substream_id, - ?connection_id, - "open substream", - ); - - self.pending_substreams.push(Box::pin(async move { - match tokio::time::timeout( - open_timeout, - Self::open_substream( - control, - substream_id, - permit, - keep_alive, - protocol.clone(), - fallback_names, - open_timeout, - ), - ) - .await - { - Ok(Ok(substream)) => Ok(substream), - Ok(Err(error)) => Err(ConnectionError::FailedToNegotiate { - protocol: Some(protocol), - substream_id: Some(substream_id), - error, - }), - Err(_) => Err(ConnectionError::Timeout { - protocol: Some(protocol), - substream_id: Some(substream_id), - }), - } - })); - - Ok(false) - } - Some(ProtocolCommand::ForceClose) => { - tracing::debug!( - target: LOG_TARGET, - peer = ?self.peer, - connection_id = ?self.endpoint.connection_id(), - "force closing connection", - ); - - self.protocol_set - .report_connection_closed(self.peer, self.endpoint.connection_id()) - .await?; - Ok(true) - } - None => { - tracing::debug!(target: LOG_TARGET, "protocols have disconnected, closing connection"); - self.protocol_set - .report_connection_closed(self.peer, self.endpoint.connection_id()) - .await?; - Ok(true) - } - } - } - - /// Start the connection event loop without notifying protocols. - /// This is used when protocols have already been notified during accept(). - pub(crate) async fn start(mut self) -> crate::Result<()> { - loop { - tokio::select! { - substream = self.connection.next() => { - if self.handle_yamux_substream(substream).await? { - return Ok(()); - } - }, - substream = self.pending_substreams.select_next_some(), if !self.pending_substreams.is_empty() => { - self.handle_negotiated_substream(substream).await?; - } - protocol = self.protocol_set.next() => { - if self.handle_protocol_command(protocol).await? { - return Ok(()) - } - } - } - } - } + /// Create new [`TcpConnection`] from [`NegotiatedConnection`]. + pub(super) fn new( + context: NegotiatedConnection, + protocol_set: ProtocolSet, + bandwidth_sink: BandwidthSink, + next_substream_id: Arc, + ) -> Self { + let NegotiatedConnection { connection, control, peer, endpoint, substream_open_timeout } = + context; + + Self { + protocol_set, + connection, + control, + peer, + endpoint, + bandwidth_sink, + next_substream_id, + pending_substreams: FuturesUnordered::new(), + substream_open_timeout, + } + } + + /// Open connection to remote peer at `address`. + // TODO: https://github.com/paritytech/litep2p/issues/347 this function can be removed + pub(super) async fn open_connection( + connection_id: ConnectionId, + keypair: Keypair, + stream: TcpStream, + address: AddressType, + peer: Option, + yamux_config: crate::yamux::Config, + max_read_ahead_factor: usize, + max_write_buffer_size: usize, + connection_open_timeout: Duration, + substream_open_timeout: Duration, + ) -> Result { + tracing::debug!( + target: LOG_TARGET, + ?address, + ?peer, + "open connection to remote peer", + ); + + match tokio::time::timeout(connection_open_timeout, async move { + Self::negotiate_connection( + stream, + peer, + connection_id, + keypair, + Role::Dialer, + address, + yamux_config, + max_read_ahead_factor, + max_write_buffer_size, + substream_open_timeout, + ) + .await + }) + .await + { + Err(_) => { + tracing::trace!(target: LOG_TARGET, ?connection_id, "connection timed out during negotiation"); + Err(NegotiationError::Timeout) + }, + Ok(result) => result, + } + } + + /// Open substream for `protocol`. + pub(super) async fn open_substream( + mut control: crate::yamux::Control, + substream_id: SubstreamId, + permit: Permit, + keep_alive: SubstreamKeepAlive, + protocol: ProtocolName, + fallback_names: Vec, + open_timeout: Duration, + ) -> Result { + tracing::debug!(target: LOG_TARGET, ?protocol, ?substream_id, "open substream"); + + let stream = match control.open_stream().await { + Ok(stream) => { + tracing::trace!(target: LOG_TARGET, ?substream_id, "substream opened"); + stream + }, + Err(error) => { + tracing::debug!( + target: LOG_TARGET, + ?substream_id, + ?error, + "failed to open substream" + ); + return Err(SubstreamError::YamuxError(error, Direction::Outbound(substream_id))); + }, + }; + + // TODO: https://github.com/paritytech/litep2p/issues/346 protocols don't change after + // they've been initialized so this should be done only once + let protocols = std::iter::once(&*protocol) + .chain(fallback_names.iter().map(|protocol| &**protocol)) + .collect(); + + let (io, protocol) = + Self::negotiate_protocol(stream, &Role::Dialer, protocols, open_timeout).await?; + + Ok(NegotiatedSubstream { + io: io.inner(), + substream_id, + direction: Direction::Outbound(substream_id), + protocol, + permit, + keep_alive, + }) + } + + /// Accept a new connection. + pub(super) async fn accept_connection( + stream: TcpStream, + connection_id: ConnectionId, + keypair: Keypair, + address: SocketAddr, + yamux_config: crate::yamux::Config, + max_read_ahead_factor: usize, + max_write_buffer_size: usize, + connection_open_timeout: Duration, + substream_open_timeout: Duration, + ) -> Result { + tracing::debug!(target: LOG_TARGET, ?address, "accept connection"); + + match tokio::time::timeout(connection_open_timeout, async move { + Self::negotiate_connection( + stream, + None, + connection_id, + keypair, + Role::Listener, + AddressType::Socket(address), + yamux_config, + max_read_ahead_factor, + max_write_buffer_size, + substream_open_timeout, + ) + .await + }) + .await + { + Err(_) => Err(NegotiationError::Timeout), + Ok(result) => result, + } + } + + /// Accept substream. + pub(super) async fn accept_substream( + stream: crate::yamux::Stream, + permit: Permit, + substream_id: SubstreamId, + protocols: HashMap, + open_timeout: Duration, + ) -> Result { + tracing::trace!( + target: LOG_TARGET, + ?substream_id, + "accept inbound substream", + ); + + let protocol_names = protocols.keys().map(|protocol| &**protocol).collect::>(); + let (io, protocol) = + Self::negotiate_protocol(stream, &Role::Listener, protocol_names, open_timeout).await?; + let keep_alive = *protocols.get(&protocol).expect("protocol to be one of the keys"); + + tracing::trace!( + target: LOG_TARGET, + ?substream_id, + "substream accepted and negotiated", + ); + + Ok(NegotiatedSubstream { + io: io.inner(), + substream_id, + direction: Direction::Inbound, + protocol, + permit, + keep_alive, + }) + } + + /// Negotiate protocol. + async fn negotiate_protocol( + stream: S, + role: &Role, + protocols: Vec<&str>, + substream_open_timeout: Duration, + ) -> Result<(Negotiated, ProtocolName), NegotiationError> { + tracing::trace!(target: LOG_TARGET, ?protocols, "negotiating protocols"); + + match tokio::time::timeout(substream_open_timeout, async move { + match role { + Role::Dialer => dialer_select_proto(stream, protocols, Version::V1).await, + Role::Listener => listener_select_proto(stream, protocols).await, + } + }) + .await + { + Err(_) => Err(NegotiationError::Timeout), + Ok(Err(error)) => Err(NegotiationError::MultistreamSelectError(error)), + Ok(Ok((protocol, socket))) => { + tracing::trace!(target: LOG_TARGET, ?protocol, "protocol negotiated"); + + Ok((socket, ProtocolName::from(protocol.to_string()))) + }, + } + } + + /// Negotiate noise + yamux for the connection. + pub(super) async fn negotiate_connection( + stream: TcpStream, + dialed_peer: Option, + connection_id: ConnectionId, + keypair: Keypair, + role: Role, + address: AddressType, + yamux_config: crate::yamux::Config, + max_read_ahead_factor: usize, + max_write_buffer_size: usize, + substream_open_timeout: Duration, + ) -> Result { + tracing::trace!( + target: LOG_TARGET, + ?role, + "negotiate connection", + ); + + let stream = TokioAsyncReadCompatExt::compat(stream).into_inner(); + let stream = TokioAsyncWriteCompatExt::compat_write(stream); + + // negotiate `noise` + let (stream, _) = + Self::negotiate_protocol(stream, &role, vec!["/noise"], substream_open_timeout).await?; + + tracing::trace!( + target: LOG_TARGET, + "`multistream-select` and `noise` negotiated", + ); + + // perform noise handshake + let (stream, peer) = noise::handshake( + stream.inner(), + &keypair, + role, + max_read_ahead_factor, + max_write_buffer_size, + substream_open_timeout, + noise::HandshakeTransport::Tcp, + ) + .await?; + + if let Some(dialed_peer) = dialed_peer { + if dialed_peer != peer { + tracing::debug!(target: LOG_TARGET, ?dialed_peer, ?peer, "peer id mismatch"); + return Err(NegotiationError::PeerIdMismatch(dialed_peer, peer)); + } + } + + tracing::trace!(target: LOG_TARGET, "noise handshake done"); + let stream: NoiseSocket> = stream; + + // negotiate `yamux` + let (stream, _) = + Self::negotiate_protocol(stream, &role, vec!["/yamux/1.0.0"], substream_open_timeout) + .await?; + tracing::trace!(target: LOG_TARGET, "`yamux` negotiated"); + + let connection = crate::yamux::Connection::new(stream.inner(), yamux_config, role.into()); + let (control, connection) = crate::yamux::Control::new(connection); + + let address = match address { + AddressType::Socket(address) => Multiaddr::empty() + .with(Protocol::from(address.ip())) + .with(Protocol::Tcp(address.port())), + AddressType::Dns { address, port, dns_type } => match dns_type { + DnsType::Dns => Multiaddr::empty() + .with(Protocol::Dns(Cow::Owned(address))) + .with(Protocol::Tcp(port)), + DnsType::Dns4 => Multiaddr::empty() + .with(Protocol::Dns4(Cow::Owned(address))) + .with(Protocol::Tcp(port)), + DnsType::Dns6 => Multiaddr::empty() + .with(Protocol::Dns6(Cow::Owned(address))) + .with(Protocol::Tcp(port)), + }, + }; + let endpoint = match role { + Role::Dialer => Endpoint::dialer(address, connection_id), + Role::Listener => Endpoint::listener(address, connection_id), + }; + + Ok(NegotiatedConnection { peer, control, connection, endpoint, substream_open_timeout }) + } + + /// Handles the yamux substream. + /// + /// Returns `true` if the connection handler should exit. + async fn handle_yamux_substream( + &mut self, + substream: Option>, + ) -> crate::Result { + match substream { + Some(Ok(stream)) => { + let substream_id = { + let substream_id = self.next_substream_id.fetch_add(1usize, Ordering::Relaxed); + SubstreamId::from(substream_id) + }; + let protocols = self.protocol_set.protocols_with_keep_alives(); + // This permit will be passed on until the substream is reported to the + // [`TransportService`](crate::protocol::TransportService), where the connection + // will be upgraded and the permit won't be needed anymore. + let permit = self.protocol_set.try_get_permit().ok_or(Error::ConnectionClosed)?; + let open_timeout = self.substream_open_timeout; + + self.pending_substreams.push(Box::pin(async move { + match tokio::time::timeout( + open_timeout, + Self::accept_substream( + stream, + permit, + substream_id, + protocols, + open_timeout, + ), + ) + .await + { + Ok(Ok(substream)) => Ok(substream), + Ok(Err(error)) => Err(ConnectionError::FailedToNegotiate { + protocol: None, + substream_id: None, + error: SubstreamError::NegotiationError(error), + }), + Err(_) => + Err(ConnectionError::Timeout { protocol: None, substream_id: None }), + } + })); + + Ok(false) + }, + Some(Err(error)) => { + tracing::debug!( + target: LOG_TARGET, + peer = ?self.peer, + ?error, + "connection closed with error", + ); + + self.protocol_set + .report_connection_closed(self.peer, self.endpoint.connection_id()) + .await?; + Ok(true) + }, + None => { + tracing::debug!(target: LOG_TARGET, peer = ?self.peer, "connection closed"); + self.protocol_set + .report_connection_closed(self.peer, self.endpoint.connection_id()) + .await?; + Ok(true) + }, + } + } + + /// Handles negotiated substream results. + async fn handle_negotiated_substream( + &mut self, + result: Result, + ) -> crate::Result<()> { + match result { + Err(error) => { + tracing::debug!( + target: LOG_TARGET, + ?error, + "failed to accept/open substream", + ); + + let (protocol, substream_id, error) = match error { + ConnectionError::Timeout { protocol, substream_id } => ( + protocol, + substream_id, + SubstreamError::NegotiationError(NegotiationError::Timeout), + ), + ConnectionError::FailedToNegotiate { protocol, substream_id, error } => + (protocol, substream_id, error), + }; + + match (protocol, substream_id) { + (Some(protocol), Some(substream_id)) => { + self.protocol_set + .report_substream_open_failure(protocol.clone(), substream_id, error) + .await + .inspect_err(|error| { + tracing::error!( + target: LOG_TARGET, + ?protocol, + endpoint = ?self.endpoint, + ?error, + "failed to register substream open failure to protocol" + ); + })?; + }, + _ => {}, + } + }, + Ok(substream) => { + let protocol = substream.protocol.clone(); + let direction = substream.direction; + let substream_id = substream.substream_id; + let socket = FuturesAsyncReadCompatExt::compat(substream.io); + let bandwidth_sink = self.bandwidth_sink.clone(); + let opening_permit = substream.permit; + let lifetime_permit = substream.keep_alive.then(|| opening_permit.clone()); + + let substream = substream::Substream::new_tcp( + self.peer, + substream_id, + Substream::new(socket, bandwidth_sink, lifetime_permit), + self.protocol_set.protocol_codec(&protocol), + ); + + self.protocol_set + .report_substream_open( + self.peer, + protocol.clone(), + direction, + substream, + opening_permit, + ) + .await + .inspect_err(|error| { + tracing::error!( + target: LOG_TARGET, + ?protocol, + peer = ?self.peer, + endpoint = ?self.endpoint, + ?error, + "failed to register opened substream to protocol", + ); + })?; + }, + } + + Ok(()) + } + + /// Handles protocol command. + /// + /// Returns `true` if the connection handler should exit. + async fn handle_protocol_command( + &mut self, + command: Option, + ) -> crate::Result { + match command { + Some(ProtocolCommand::OpenSubstream { + protocol, + fallback_names, + substream_id, + connection_id, + permit, + keep_alive, + }) => { + let control = self.control.clone(); + let open_timeout = self.substream_open_timeout; + + tracing::trace!( + target: LOG_TARGET, + ?protocol, + ?substream_id, + ?connection_id, + "open substream", + ); + + self.pending_substreams.push(Box::pin(async move { + match tokio::time::timeout( + open_timeout, + Self::open_substream( + control, + substream_id, + permit, + keep_alive, + protocol.clone(), + fallback_names, + open_timeout, + ), + ) + .await + { + Ok(Ok(substream)) => Ok(substream), + Ok(Err(error)) => Err(ConnectionError::FailedToNegotiate { + protocol: Some(protocol), + substream_id: Some(substream_id), + error, + }), + Err(_) => Err(ConnectionError::Timeout { + protocol: Some(protocol), + substream_id: Some(substream_id), + }), + } + })); + + Ok(false) + }, + Some(ProtocolCommand::ForceClose) => { + tracing::debug!( + target: LOG_TARGET, + peer = ?self.peer, + connection_id = ?self.endpoint.connection_id(), + "force closing connection", + ); + + self.protocol_set + .report_connection_closed(self.peer, self.endpoint.connection_id()) + .await?; + Ok(true) + }, + None => { + tracing::debug!(target: LOG_TARGET, "protocols have disconnected, closing connection"); + self.protocol_set + .report_connection_closed(self.peer, self.endpoint.connection_id()) + .await?; + Ok(true) + }, + } + } + + /// Start the connection event loop without notifying protocols. + /// This is used when protocols have already been notified during accept(). + pub(crate) async fn start(mut self) -> crate::Result<()> { + loop { + tokio::select! { + substream = self.connection.next() => { + if self.handle_yamux_substream(substream).await? { + return Ok(()); + } + }, + substream = self.pending_substreams.select_next_some(), if !self.pending_substreams.is_empty() => { + self.handle_negotiated_substream(substream).await?; + } + protocol = self.protocol_set.next() => { + if self.handle_protocol_command(protocol).await? { + return Ok(()) + } + } + } + } + } } #[cfg(test)] mod tests { - use crate::transport::tcp::TcpTransport; - - use super::*; - use hickory_resolver::{name_server::TokioConnectionProvider, TokioResolver}; - use tokio::{io::AsyncWriteExt, net::TcpListener}; - - #[tokio::test] - async fn multistream_select_not_supported_dialer() { - let _ = tracing_subscriber::fmt() - .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) - .try_init(); - - let listener = TcpListener::bind("[::1]:0").await.unwrap(); - let address = listener.local_addr().unwrap(); - - tokio::spawn(async move { - let (mut stream, _) = listener.accept().await.unwrap(); - let _ = stream.write_all(&vec![0x12u8; 256]).await; - }); - - let (_, stream) = TcpTransport::dial_peer( - Multiaddr::empty() - .with(Protocol::from(address.ip())) - .with(Protocol::Tcp(address.port())), - Default::default(), - Duration::from_secs(10), - false, - Arc::new( - TokioResolver::builder_with_config( - Default::default(), - TokioConnectionProvider::default(), - ) - .build(), - ), - ) - .await - .unwrap(); - - match TcpConnection::open_connection( - ConnectionId::from(0usize), - Keypair::generate(), - stream, - AddressType::Socket(address), - None, - Default::default(), - 5, - 2, - Duration::from_secs(10), - Duration::from_secs(10), - ) - .await - { - Ok(_) => panic!("connection was supposed to fail"), - Err(NegotiationError::MultistreamSelectError( - crate::multistream_select::NegotiationError::ProtocolError( - crate::multistream_select::ProtocolError::InvalidMessage, - ), - )) => {} - Err(error) => panic!("invalid error: {error:?}"), - } - } - - #[tokio::test] - async fn multistream_select_not_supported_listener() { - let _ = tracing_subscriber::fmt() - .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) - .try_init(); - - let listener = TcpListener::bind("[::1]:0").await.unwrap(); - let address = listener.local_addr().unwrap(); - - let (Ok(mut dialer), Ok((stream, dialer_address))) = - tokio::join!(TcpStream::connect(address), listener.accept(),) - else { - panic!("failed to establish connection"); - }; - - tokio::spawn(async move { - let _ = dialer.write_all(&vec![0x12u8; 256]).await; - }); - - match TcpConnection::accept_connection( - stream, - ConnectionId::from(0usize), - Keypair::generate(), - dialer_address, - Default::default(), - 5, - 2, - Duration::from_secs(10), - Duration::from_secs(10), - ) - .await - { - Ok(_) => panic!("connection was supposed to fail"), - Err(NegotiationError::MultistreamSelectError( - crate::multistream_select::NegotiationError::ProtocolError( - crate::multistream_select::ProtocolError::InvalidMessage, - ), - )) => {} - Err(error) => panic!("invalid error: {error:?}"), - } - } - - #[tokio::test] - async fn noise_not_supported_dialer() { - let _ = tracing_subscriber::fmt() - .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) - .try_init(); - - let listener = TcpListener::bind("[::1]:0").await.unwrap(); - let address = listener.local_addr().unwrap(); - - tokio::spawn(async move { - let (stream, _) = listener.accept().await.unwrap(); - let stream = TokioAsyncReadCompatExt::compat(stream).into_inner(); - let stream = TokioAsyncWriteCompatExt::compat_write(stream); - - // attempt to negotiate yamux, skipping noise entirely - assert!(listener_select_proto(stream, vec!["/yamux/1.0.0"]).await.is_err()); - }); - - let (_, stream) = TcpTransport::dial_peer( - Multiaddr::empty() - .with(Protocol::from(address.ip())) - .with(Protocol::Tcp(address.port())), - Default::default(), - Duration::from_secs(10), - false, - Arc::new( - TokioResolver::builder_with_config( - Default::default(), - TokioConnectionProvider::default(), - ) - .build(), - ), - ) - .await - .unwrap(); - - match TcpConnection::open_connection( - ConnectionId::from(0usize), - Keypair::generate(), - stream, - AddressType::Socket(address), - None, - Default::default(), - 5, - 2, - Duration::from_secs(10), - Duration::from_secs(10), - ) - .await - { - Ok(_) => panic!("connection was supposed to fail"), - Err(NegotiationError::MultistreamSelectError( - crate::multistream_select::NegotiationError::Failed, - )) => {} - Err(error) => panic!("invalid error: {error:?}"), - } - } - - #[tokio::test] - async fn noise_not_supported_listener() { - let _ = tracing_subscriber::fmt() - .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) - .try_init(); - - let listener = TcpListener::bind("[::1]:0").await.unwrap(); - let address = listener.local_addr().unwrap(); - - let (Ok(dialer), Ok((listener, dialer_address))) = - tokio::join!(TcpStream::connect(address), listener.accept(),) - else { - panic!("failed to establish connection"); - }; - - tokio::spawn(async move { - let dialer = TokioAsyncReadCompatExt::compat(dialer).into_inner(); - let dialer = TokioAsyncWriteCompatExt::compat_write(dialer); - - // attempt to negotiate yamux, skipping noise entirely - assert!(dialer_select_proto(dialer, vec!["/yamux/1.0.0"], Version::V1).await.is_err()); - }); - - match TcpConnection::accept_connection( - listener, - ConnectionId::from(0usize), - Keypair::generate(), - dialer_address, - Default::default(), - 5, - 2, - Duration::from_secs(10), - Duration::from_secs(10), - ) - .await - { - Ok(_) => panic!("connection was supposed to fail"), - Err(NegotiationError::MultistreamSelectError( - crate::multistream_select::NegotiationError::Failed, - )) => {} - Err(error) => panic!("invalid error: {error:?}"), - } - } - - #[tokio::test] - async fn noise_timeout_listener() { - let _ = tracing_subscriber::fmt() - .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) - .try_init(); - - let listener = TcpListener::bind("[::1]:0").await.unwrap(); - let address = listener.local_addr().unwrap(); - - let (Ok(dialer), Ok((listener, dialer_address))) = - tokio::join!(TcpStream::connect(address), listener.accept(),) - else { - panic!("failed to establish connection"); - }; - - tokio::spawn(async move { - let dialer = TokioAsyncReadCompatExt::compat(dialer).into_inner(); - let dialer = TokioAsyncWriteCompatExt::compat_write(dialer); - - // attempt to negotiate yamux, skipping noise entirely - let (_protocol, _socket) = - dialer_select_proto(dialer, vec!["/noise"], Version::V1).await.unwrap(); - - tokio::time::sleep(std::time::Duration::from_secs(60)).await; - }); - - match TcpConnection::accept_connection( - listener, - ConnectionId::from(0usize), - Keypair::generate(), - dialer_address, - Default::default(), - 5, - 2, - Duration::from_secs(10), - Duration::from_secs(10), - ) - .await - { - Ok(_) => panic!("connection was supposed to fail"), - Err(NegotiationError::Timeout) => {} - Err(error) => panic!("invalid error: {error:?}"), - } - } - - #[tokio::test] - async fn noise_timeout_dialer() { - let _ = tracing_subscriber::fmt() - .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) - .try_init(); - - let listener = TcpListener::bind("[::1]:0").await.unwrap(); - let address = listener.local_addr().unwrap(); - - tokio::spawn(async move { - let (stream, _) = listener.accept().await.unwrap(); - let stream = TokioAsyncReadCompatExt::compat(stream).into_inner(); - let stream = TokioAsyncWriteCompatExt::compat_write(stream); - - // negotiate noise but never actually send any handshake data - let (_protocol, _socket) = listener_select_proto(stream, vec!["/noise"]).await.unwrap(); - - tokio::time::sleep(std::time::Duration::from_secs(60)).await; - }); - - let (_, stream) = TcpTransport::dial_peer( - Multiaddr::empty() - .with(Protocol::from(address.ip())) - .with(Protocol::Tcp(address.port())), - Default::default(), - Duration::from_secs(10), - false, - Arc::new( - TokioResolver::builder_with_config( - Default::default(), - TokioConnectionProvider::default(), - ) - .build(), - ), - ) - .await - .unwrap(); - - match TcpConnection::open_connection( - ConnectionId::from(0usize), - Keypair::generate(), - stream, - AddressType::Socket(address), - None, - Default::default(), - 5, - 2, - Duration::from_secs(10), - Duration::from_secs(10), - ) - .await - { - Ok(_) => panic!("connection was supposed to fail"), - Err(NegotiationError::Timeout) => {} - Err(error) => panic!("invalid error: {error:?}"), - } - } - - #[tokio::test] - async fn multistream_select_timeout_dialer() { - let _ = tracing_subscriber::fmt() - .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) - .try_init(); - - let listener = TcpListener::bind("[::1]:0").await.unwrap(); - let address = listener.local_addr().unwrap(); - - tokio::spawn(async move { - let _stream = listener.accept().await.unwrap(); - - tokio::time::sleep(std::time::Duration::from_secs(60)).await; - }); - - let (_, stream) = TcpTransport::dial_peer( - Multiaddr::empty() - .with(Protocol::from(address.ip())) - .with(Protocol::Tcp(address.port())), - Default::default(), - Duration::from_secs(10), - false, - Arc::new( - TokioResolver::builder_with_config( - Default::default(), - TokioConnectionProvider::default(), - ) - .build(), - ), - ) - .await - .unwrap(); - - match TcpConnection::open_connection( - ConnectionId::from(0usize), - Keypair::generate(), - stream, - AddressType::Socket(address), - None, - Default::default(), - 5, - 2, - Duration::from_secs(10), - Duration::from_secs(10), - ) - .await - { - Ok(_) => panic!("connection was supposed to fail"), - Err(NegotiationError::Timeout) => {} - Err(error) => panic!("invalid error: {error:?}"), - } - } - - #[tokio::test] - async fn multistream_select_timeout_listener() { - let _ = tracing_subscriber::fmt() - .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) - .try_init(); - - let listener = TcpListener::bind("[::1]:0").await.unwrap(); - let address = listener.local_addr().unwrap(); - - let (Ok(_dialer), Ok((listener, dialer_address))) = - tokio::join!(TcpStream::connect(address), listener.accept(),) - else { - panic!("failed to establish connection"); - }; - - tokio::spawn(async move { - let _stream = TcpStream::connect(address).await.unwrap(); - - tokio::time::sleep(std::time::Duration::from_secs(60)).await; - }); - - match TcpConnection::accept_connection( - listener, - ConnectionId::from(0usize), - Keypair::generate(), - dialer_address, - Default::default(), - 5, - 2, - Duration::from_secs(10), - Duration::from_secs(10), - ) - .await - { - Ok(_) => panic!("connection was supposed to fail"), - Err(NegotiationError::Timeout) => {} - Err(error) => panic!("invalid error: {error:?}"), - } - } - - #[tokio::test] - async fn yamux_not_supported_dialer() { - let _ = tracing_subscriber::fmt() - .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) - .try_init(); - - let listener = TcpListener::bind("[::1]:0").await.unwrap(); - let address = listener.local_addr().unwrap(); - - let (Ok(dialer), Ok((listener, dialer_address))) = - tokio::join!(TcpStream::connect(address), listener.accept(),) - else { - panic!("failed to establish connection"); - }; - - tokio::spawn(async move { - let dialer = TokioAsyncReadCompatExt::compat(dialer).into_inner(); - let dialer = TokioAsyncWriteCompatExt::compat_write(dialer); - - // negotiate noise - let (_protocol, stream) = - dialer_select_proto(dialer, vec!["/noise"], Version::V1).await.unwrap(); - - let keypair = Keypair::generate(); - - // do a noise handshake - let (stream, _peer) = noise::handshake( - stream.inner(), - &keypair, - Role::Dialer, - 5, - 2, - std::time::Duration::from_secs(10), - noise::HandshakeTransport::Tcp, - ) - .await - .unwrap(); - let stream: NoiseSocket> = stream; - - // after the handshake, try to negotiate some random protocol instead of yamux - assert!( - dialer_select_proto(stream, vec!["/unsupported/1"], Version::V1).await.is_err() - ); - }); - - match TcpConnection::accept_connection( - listener, - ConnectionId::from(0usize), - Keypair::generate(), - dialer_address, - Default::default(), - 5, - 2, - Duration::from_secs(10), - Duration::from_secs(10), - ) - .await - { - Ok(_) => panic!("connection was supposed to fail"), - Err(NegotiationError::MultistreamSelectError( - crate::multistream_select::NegotiationError::Failed, - )) => {} - Err(error) => panic!("{error:?}"), - } - } - - #[tokio::test] - async fn yamux_not_supported_listener() { - let _ = tracing_subscriber::fmt() - .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) - .try_init(); - - let listener = TcpListener::bind("[::1]:0").await.unwrap(); - let address = listener.local_addr().unwrap(); - - tokio::spawn(async move { - let (stream, _) = listener.accept().await.unwrap(); - let stream = TokioAsyncReadCompatExt::compat(stream).into_inner(); - let stream = TokioAsyncWriteCompatExt::compat_write(stream); - - // negotiate noise - let (_protocol, stream) = listener_select_proto(stream, vec!["/noise"]).await.unwrap(); - - // do a noise handshake - let keypair = Keypair::generate(); - let (stream, _peer) = noise::handshake( - stream.inner(), - &keypair, - Role::Listener, - 5, - 2, - std::time::Duration::from_secs(10), - noise::HandshakeTransport::Tcp, - ) - .await - .unwrap(); - let stream: NoiseSocket> = stream; - - // after the handshake, try to negotiate some random protocol instead of yamux - assert!(listener_select_proto(stream, vec!["/unsupported/1"]).await.is_err()); - }); - - let (_, stream) = TcpTransport::dial_peer( - Multiaddr::empty() - .with(Protocol::from(address.ip())) - .with(Protocol::Tcp(address.port())), - Default::default(), - Duration::from_secs(10), - false, - Arc::new( - TokioResolver::builder_with_config( - Default::default(), - TokioConnectionProvider::default(), - ) - .build(), - ), - ) - .await - .unwrap(); - - match TcpConnection::open_connection( - ConnectionId::from(0usize), - Keypair::generate(), - stream, - AddressType::Socket(address), - None, - Default::default(), - 5, - 2, - Duration::from_secs(10), - Duration::from_secs(10), - ) - .await - { - Ok(_) => panic!("connection was supposed to fail"), - Err(NegotiationError::MultistreamSelectError( - crate::multistream_select::NegotiationError::Failed, - )) => {} - Err(error) => panic!("{error:?}"), - } - } - - #[tokio::test] - async fn yamux_timeout_dialer() { - let _ = tracing_subscriber::fmt() - .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) - .try_init(); - - let listener = TcpListener::bind("[::1]:0").await.unwrap(); - let address = listener.local_addr().unwrap(); - - let (Ok(dialer), Ok((listener, dialer_address))) = - tokio::join!(TcpStream::connect(address), listener.accept()) - else { - panic!("failed to establish connection"); - }; - - tokio::spawn(async move { - let dialer = TokioAsyncReadCompatExt::compat(dialer).into_inner(); - let dialer = TokioAsyncWriteCompatExt::compat_write(dialer); - - // negotiate noise - let (_protocol, stream) = - dialer_select_proto(dialer, vec!["/noise"], Version::V1).await.unwrap(); - - // do a noise handshake - let keypair = Keypair::generate(); - let (stream, _peer) = noise::handshake( - stream.inner(), - &keypair, - Role::Dialer, - 5, - 2, - std::time::Duration::from_secs(10), - noise::HandshakeTransport::Tcp, - ) - .await - .unwrap(); - let _stream: NoiseSocket> = stream; - - tokio::time::sleep(std::time::Duration::from_secs(60)).await; - }); - - match TcpConnection::accept_connection( - listener, - ConnectionId::from(0usize), - Keypair::generate(), - dialer_address, - Default::default(), - 5, - 2, - Duration::from_secs(10), - Duration::from_secs(10), - ) - .await - { - Ok(_) => panic!("connection was supposed to fail"), - Err(NegotiationError::Timeout) => {} - Err(error) => panic!("invalid error: {error:?}"), - } - } - - #[tokio::test] - async fn yamux_timeout_listener() { - let _ = tracing_subscriber::fmt() - .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) - .try_init(); - - let listener = TcpListener::bind("[::1]:0").await.unwrap(); - let address = listener.local_addr().unwrap(); - - tokio::spawn(async move { - let (stream, _) = listener.accept().await.unwrap(); - let stream = TokioAsyncReadCompatExt::compat(stream).into_inner(); - let stream = TokioAsyncWriteCompatExt::compat_write(stream); - - // negotiate noise - let (_protocol, stream) = listener_select_proto(stream, vec!["/noise"]).await.unwrap(); - - // do a noise handshake - let keypair = Keypair::generate(); - let (stream, _peer) = noise::handshake( - stream.inner(), - &keypair, - Role::Listener, - 5, - 2, - std::time::Duration::from_secs(10), - noise::HandshakeTransport::Tcp, - ) - .await - .unwrap(); - let _stream: NoiseSocket> = stream; - - tokio::time::sleep(std::time::Duration::from_secs(60)).await; - }); - - let (_, stream) = TcpTransport::dial_peer( - Multiaddr::empty() - .with(Protocol::from(address.ip())) - .with(Protocol::Tcp(address.port())), - Default::default(), - Duration::from_secs(10), - false, - Arc::new( - TokioResolver::builder_with_config( - Default::default(), - TokioConnectionProvider::default(), - ) - .build(), - ), - ) - .await - .unwrap(); - - match TcpConnection::open_connection( - ConnectionId::from(0usize), - Keypair::generate(), - stream, - AddressType::Socket(address), - None, - Default::default(), - 5, - 2, - Duration::from_secs(10), - Duration::from_secs(10), - ) - .await - { - Ok(_) => panic!("connection was supposed to fail"), - Err(NegotiationError::Timeout) => {} - Err(error) => panic!("invalid error: {error:?}"), - } - } + use crate::transport::tcp::TcpTransport; + + use super::*; + use hickory_resolver::{name_server::TokioConnectionProvider, TokioResolver}; + use tokio::{io::AsyncWriteExt, net::TcpListener}; + + #[tokio::test] + async fn multistream_select_not_supported_dialer() { + let _ = tracing_subscriber::fmt() + .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) + .try_init(); + + let listener = TcpListener::bind("[::1]:0").await.unwrap(); + let address = listener.local_addr().unwrap(); + + tokio::spawn(async move { + let (mut stream, _) = listener.accept().await.unwrap(); + let _ = stream.write_all(&vec![0x12u8; 256]).await; + }); + + let (_, stream) = TcpTransport::dial_peer( + Multiaddr::empty() + .with(Protocol::from(address.ip())) + .with(Protocol::Tcp(address.port())), + Default::default(), + Duration::from_secs(10), + false, + Arc::new( + TokioResolver::builder_with_config( + Default::default(), + TokioConnectionProvider::default(), + ) + .build(), + ), + ) + .await + .unwrap(); + + match TcpConnection::open_connection( + ConnectionId::from(0usize), + Keypair::generate(), + stream, + AddressType::Socket(address), + None, + Default::default(), + 5, + 2, + Duration::from_secs(10), + Duration::from_secs(10), + ) + .await + { + Ok(_) => panic!("connection was supposed to fail"), + Err(NegotiationError::MultistreamSelectError( + crate::multistream_select::NegotiationError::ProtocolError( + crate::multistream_select::ProtocolError::InvalidMessage, + ), + )) => {}, + Err(error) => panic!("invalid error: {error:?}"), + } + } + + #[tokio::test] + async fn multistream_select_not_supported_listener() { + let _ = tracing_subscriber::fmt() + .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) + .try_init(); + + let listener = TcpListener::bind("[::1]:0").await.unwrap(); + let address = listener.local_addr().unwrap(); + + let (Ok(mut dialer), Ok((stream, dialer_address))) = + tokio::join!(TcpStream::connect(address), listener.accept(),) + else { + panic!("failed to establish connection"); + }; + + tokio::spawn(async move { + let _ = dialer.write_all(&vec![0x12u8; 256]).await; + }); + + match TcpConnection::accept_connection( + stream, + ConnectionId::from(0usize), + Keypair::generate(), + dialer_address, + Default::default(), + 5, + 2, + Duration::from_secs(10), + Duration::from_secs(10), + ) + .await + { + Ok(_) => panic!("connection was supposed to fail"), + Err(NegotiationError::MultistreamSelectError( + crate::multistream_select::NegotiationError::ProtocolError( + crate::multistream_select::ProtocolError::InvalidMessage, + ), + )) => {}, + Err(error) => panic!("invalid error: {error:?}"), + } + } + + #[tokio::test] + async fn noise_not_supported_dialer() { + let _ = tracing_subscriber::fmt() + .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) + .try_init(); + + let listener = TcpListener::bind("[::1]:0").await.unwrap(); + let address = listener.local_addr().unwrap(); + + tokio::spawn(async move { + let (stream, _) = listener.accept().await.unwrap(); + let stream = TokioAsyncReadCompatExt::compat(stream).into_inner(); + let stream = TokioAsyncWriteCompatExt::compat_write(stream); + + // attempt to negotiate yamux, skipping noise entirely + assert!(listener_select_proto(stream, vec!["/yamux/1.0.0"]).await.is_err()); + }); + + let (_, stream) = TcpTransport::dial_peer( + Multiaddr::empty() + .with(Protocol::from(address.ip())) + .with(Protocol::Tcp(address.port())), + Default::default(), + Duration::from_secs(10), + false, + Arc::new( + TokioResolver::builder_with_config( + Default::default(), + TokioConnectionProvider::default(), + ) + .build(), + ), + ) + .await + .unwrap(); + + match TcpConnection::open_connection( + ConnectionId::from(0usize), + Keypair::generate(), + stream, + AddressType::Socket(address), + None, + Default::default(), + 5, + 2, + Duration::from_secs(10), + Duration::from_secs(10), + ) + .await + { + Ok(_) => panic!("connection was supposed to fail"), + Err(NegotiationError::MultistreamSelectError( + crate::multistream_select::NegotiationError::Failed, + )) => {}, + Err(error) => panic!("invalid error: {error:?}"), + } + } + + #[tokio::test] + async fn noise_not_supported_listener() { + let _ = tracing_subscriber::fmt() + .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) + .try_init(); + + let listener = TcpListener::bind("[::1]:0").await.unwrap(); + let address = listener.local_addr().unwrap(); + + let (Ok(dialer), Ok((listener, dialer_address))) = + tokio::join!(TcpStream::connect(address), listener.accept(),) + else { + panic!("failed to establish connection"); + }; + + tokio::spawn(async move { + let dialer = TokioAsyncReadCompatExt::compat(dialer).into_inner(); + let dialer = TokioAsyncWriteCompatExt::compat_write(dialer); + + // attempt to negotiate yamux, skipping noise entirely + assert!(dialer_select_proto(dialer, vec!["/yamux/1.0.0"], Version::V1).await.is_err()); + }); + + match TcpConnection::accept_connection( + listener, + ConnectionId::from(0usize), + Keypair::generate(), + dialer_address, + Default::default(), + 5, + 2, + Duration::from_secs(10), + Duration::from_secs(10), + ) + .await + { + Ok(_) => panic!("connection was supposed to fail"), + Err(NegotiationError::MultistreamSelectError( + crate::multistream_select::NegotiationError::Failed, + )) => {}, + Err(error) => panic!("invalid error: {error:?}"), + } + } + + #[tokio::test] + async fn noise_timeout_listener() { + let _ = tracing_subscriber::fmt() + .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) + .try_init(); + + let listener = TcpListener::bind("[::1]:0").await.unwrap(); + let address = listener.local_addr().unwrap(); + + let (Ok(dialer), Ok((listener, dialer_address))) = + tokio::join!(TcpStream::connect(address), listener.accept(),) + else { + panic!("failed to establish connection"); + }; + + tokio::spawn(async move { + let dialer = TokioAsyncReadCompatExt::compat(dialer).into_inner(); + let dialer = TokioAsyncWriteCompatExt::compat_write(dialer); + + // attempt to negotiate yamux, skipping noise entirely + let (_protocol, _socket) = + dialer_select_proto(dialer, vec!["/noise"], Version::V1).await.unwrap(); + + tokio::time::sleep(std::time::Duration::from_secs(60)).await; + }); + + match TcpConnection::accept_connection( + listener, + ConnectionId::from(0usize), + Keypair::generate(), + dialer_address, + Default::default(), + 5, + 2, + Duration::from_secs(10), + Duration::from_secs(10), + ) + .await + { + Ok(_) => panic!("connection was supposed to fail"), + Err(NegotiationError::Timeout) => {}, + Err(error) => panic!("invalid error: {error:?}"), + } + } + + #[tokio::test] + async fn noise_timeout_dialer() { + let _ = tracing_subscriber::fmt() + .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) + .try_init(); + + let listener = TcpListener::bind("[::1]:0").await.unwrap(); + let address = listener.local_addr().unwrap(); + + tokio::spawn(async move { + let (stream, _) = listener.accept().await.unwrap(); + let stream = TokioAsyncReadCompatExt::compat(stream).into_inner(); + let stream = TokioAsyncWriteCompatExt::compat_write(stream); + + // negotiate noise but never actually send any handshake data + let (_protocol, _socket) = listener_select_proto(stream, vec!["/noise"]).await.unwrap(); + + tokio::time::sleep(std::time::Duration::from_secs(60)).await; + }); + + let (_, stream) = TcpTransport::dial_peer( + Multiaddr::empty() + .with(Protocol::from(address.ip())) + .with(Protocol::Tcp(address.port())), + Default::default(), + Duration::from_secs(10), + false, + Arc::new( + TokioResolver::builder_with_config( + Default::default(), + TokioConnectionProvider::default(), + ) + .build(), + ), + ) + .await + .unwrap(); + + match TcpConnection::open_connection( + ConnectionId::from(0usize), + Keypair::generate(), + stream, + AddressType::Socket(address), + None, + Default::default(), + 5, + 2, + Duration::from_secs(10), + Duration::from_secs(10), + ) + .await + { + Ok(_) => panic!("connection was supposed to fail"), + Err(NegotiationError::Timeout) => {}, + Err(error) => panic!("invalid error: {error:?}"), + } + } + + #[tokio::test] + async fn multistream_select_timeout_dialer() { + let _ = tracing_subscriber::fmt() + .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) + .try_init(); + + let listener = TcpListener::bind("[::1]:0").await.unwrap(); + let address = listener.local_addr().unwrap(); + + tokio::spawn(async move { + let _stream = listener.accept().await.unwrap(); + + tokio::time::sleep(std::time::Duration::from_secs(60)).await; + }); + + let (_, stream) = TcpTransport::dial_peer( + Multiaddr::empty() + .with(Protocol::from(address.ip())) + .with(Protocol::Tcp(address.port())), + Default::default(), + Duration::from_secs(10), + false, + Arc::new( + TokioResolver::builder_with_config( + Default::default(), + TokioConnectionProvider::default(), + ) + .build(), + ), + ) + .await + .unwrap(); + + match TcpConnection::open_connection( + ConnectionId::from(0usize), + Keypair::generate(), + stream, + AddressType::Socket(address), + None, + Default::default(), + 5, + 2, + Duration::from_secs(10), + Duration::from_secs(10), + ) + .await + { + Ok(_) => panic!("connection was supposed to fail"), + Err(NegotiationError::Timeout) => {}, + Err(error) => panic!("invalid error: {error:?}"), + } + } + + #[tokio::test] + async fn multistream_select_timeout_listener() { + let _ = tracing_subscriber::fmt() + .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) + .try_init(); + + let listener = TcpListener::bind("[::1]:0").await.unwrap(); + let address = listener.local_addr().unwrap(); + + let (Ok(_dialer), Ok((listener, dialer_address))) = + tokio::join!(TcpStream::connect(address), listener.accept(),) + else { + panic!("failed to establish connection"); + }; + + tokio::spawn(async move { + let _stream = TcpStream::connect(address).await.unwrap(); + + tokio::time::sleep(std::time::Duration::from_secs(60)).await; + }); + + match TcpConnection::accept_connection( + listener, + ConnectionId::from(0usize), + Keypair::generate(), + dialer_address, + Default::default(), + 5, + 2, + Duration::from_secs(10), + Duration::from_secs(10), + ) + .await + { + Ok(_) => panic!("connection was supposed to fail"), + Err(NegotiationError::Timeout) => {}, + Err(error) => panic!("invalid error: {error:?}"), + } + } + + #[tokio::test] + async fn yamux_not_supported_dialer() { + let _ = tracing_subscriber::fmt() + .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) + .try_init(); + + let listener = TcpListener::bind("[::1]:0").await.unwrap(); + let address = listener.local_addr().unwrap(); + + let (Ok(dialer), Ok((listener, dialer_address))) = + tokio::join!(TcpStream::connect(address), listener.accept(),) + else { + panic!("failed to establish connection"); + }; + + tokio::spawn(async move { + let dialer = TokioAsyncReadCompatExt::compat(dialer).into_inner(); + let dialer = TokioAsyncWriteCompatExt::compat_write(dialer); + + // negotiate noise + let (_protocol, stream) = + dialer_select_proto(dialer, vec!["/noise"], Version::V1).await.unwrap(); + + let keypair = Keypair::generate(); + + // do a noise handshake + let (stream, _peer) = noise::handshake( + stream.inner(), + &keypair, + Role::Dialer, + 5, + 2, + std::time::Duration::from_secs(10), + noise::HandshakeTransport::Tcp, + ) + .await + .unwrap(); + let stream: NoiseSocket> = stream; + + // after the handshake, try to negotiate some random protocol instead of yamux + assert!(dialer_select_proto(stream, vec!["/unsupported/1"], Version::V1) + .await + .is_err()); + }); + + match TcpConnection::accept_connection( + listener, + ConnectionId::from(0usize), + Keypair::generate(), + dialer_address, + Default::default(), + 5, + 2, + Duration::from_secs(10), + Duration::from_secs(10), + ) + .await + { + Ok(_) => panic!("connection was supposed to fail"), + Err(NegotiationError::MultistreamSelectError( + crate::multistream_select::NegotiationError::Failed, + )) => {}, + Err(error) => panic!("{error:?}"), + } + } + + #[tokio::test] + async fn yamux_not_supported_listener() { + let _ = tracing_subscriber::fmt() + .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) + .try_init(); + + let listener = TcpListener::bind("[::1]:0").await.unwrap(); + let address = listener.local_addr().unwrap(); + + tokio::spawn(async move { + let (stream, _) = listener.accept().await.unwrap(); + let stream = TokioAsyncReadCompatExt::compat(stream).into_inner(); + let stream = TokioAsyncWriteCompatExt::compat_write(stream); + + // negotiate noise + let (_protocol, stream) = listener_select_proto(stream, vec!["/noise"]).await.unwrap(); + + // do a noise handshake + let keypair = Keypair::generate(); + let (stream, _peer) = noise::handshake( + stream.inner(), + &keypair, + Role::Listener, + 5, + 2, + std::time::Duration::from_secs(10), + noise::HandshakeTransport::Tcp, + ) + .await + .unwrap(); + let stream: NoiseSocket> = stream; + + // after the handshake, try to negotiate some random protocol instead of yamux + assert!(listener_select_proto(stream, vec!["/unsupported/1"]).await.is_err()); + }); + + let (_, stream) = TcpTransport::dial_peer( + Multiaddr::empty() + .with(Protocol::from(address.ip())) + .with(Protocol::Tcp(address.port())), + Default::default(), + Duration::from_secs(10), + false, + Arc::new( + TokioResolver::builder_with_config( + Default::default(), + TokioConnectionProvider::default(), + ) + .build(), + ), + ) + .await + .unwrap(); + + match TcpConnection::open_connection( + ConnectionId::from(0usize), + Keypair::generate(), + stream, + AddressType::Socket(address), + None, + Default::default(), + 5, + 2, + Duration::from_secs(10), + Duration::from_secs(10), + ) + .await + { + Ok(_) => panic!("connection was supposed to fail"), + Err(NegotiationError::MultistreamSelectError( + crate::multistream_select::NegotiationError::Failed, + )) => {}, + Err(error) => panic!("{error:?}"), + } + } + + #[tokio::test] + async fn yamux_timeout_dialer() { + let _ = tracing_subscriber::fmt() + .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) + .try_init(); + + let listener = TcpListener::bind("[::1]:0").await.unwrap(); + let address = listener.local_addr().unwrap(); + + let (Ok(dialer), Ok((listener, dialer_address))) = + tokio::join!(TcpStream::connect(address), listener.accept()) + else { + panic!("failed to establish connection"); + }; + + tokio::spawn(async move { + let dialer = TokioAsyncReadCompatExt::compat(dialer).into_inner(); + let dialer = TokioAsyncWriteCompatExt::compat_write(dialer); + + // negotiate noise + let (_protocol, stream) = + dialer_select_proto(dialer, vec!["/noise"], Version::V1).await.unwrap(); + + // do a noise handshake + let keypair = Keypair::generate(); + let (stream, _peer) = noise::handshake( + stream.inner(), + &keypair, + Role::Dialer, + 5, + 2, + std::time::Duration::from_secs(10), + noise::HandshakeTransport::Tcp, + ) + .await + .unwrap(); + let _stream: NoiseSocket> = stream; + + tokio::time::sleep(std::time::Duration::from_secs(60)).await; + }); + + match TcpConnection::accept_connection( + listener, + ConnectionId::from(0usize), + Keypair::generate(), + dialer_address, + Default::default(), + 5, + 2, + Duration::from_secs(10), + Duration::from_secs(10), + ) + .await + { + Ok(_) => panic!("connection was supposed to fail"), + Err(NegotiationError::Timeout) => {}, + Err(error) => panic!("invalid error: {error:?}"), + } + } + + #[tokio::test] + async fn yamux_timeout_listener() { + let _ = tracing_subscriber::fmt() + .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) + .try_init(); + + let listener = TcpListener::bind("[::1]:0").await.unwrap(); + let address = listener.local_addr().unwrap(); + + tokio::spawn(async move { + let (stream, _) = listener.accept().await.unwrap(); + let stream = TokioAsyncReadCompatExt::compat(stream).into_inner(); + let stream = TokioAsyncWriteCompatExt::compat_write(stream); + + // negotiate noise + let (_protocol, stream) = listener_select_proto(stream, vec!["/noise"]).await.unwrap(); + + // do a noise handshake + let keypair = Keypair::generate(); + let (stream, _peer) = noise::handshake( + stream.inner(), + &keypair, + Role::Listener, + 5, + 2, + std::time::Duration::from_secs(10), + noise::HandshakeTransport::Tcp, + ) + .await + .unwrap(); + let _stream: NoiseSocket> = stream; + + tokio::time::sleep(std::time::Duration::from_secs(60)).await; + }); + + let (_, stream) = TcpTransport::dial_peer( + Multiaddr::empty() + .with(Protocol::from(address.ip())) + .with(Protocol::Tcp(address.port())), + Default::default(), + Duration::from_secs(10), + false, + Arc::new( + TokioResolver::builder_with_config( + Default::default(), + TokioConnectionProvider::default(), + ) + .build(), + ), + ) + .await + .unwrap(); + + match TcpConnection::open_connection( + ConnectionId::from(0usize), + Keypair::generate(), + stream, + AddressType::Socket(address), + None, + Default::default(), + 5, + 2, + Duration::from_secs(10), + Duration::from_secs(10), + ) + .await + { + Ok(_) => panic!("connection was supposed to fail"), + Err(NegotiationError::Timeout) => {}, + Err(error) => panic!("invalid error: {error:?}"), + } + } } diff --git a/client/litep2p/src/transport/tcp/mod.rs b/client/litep2p/src/transport/tcp/mod.rs index fe51f25d..d65d1f58 100644 --- a/client/litep2p/src/transport/tcp/mod.rs +++ b/client/litep2p/src/transport/tcp/mod.rs @@ -22,24 +22,24 @@ //! TCP transport. use crate::{ - error::{DialError, Error}, - transport::{ - common::listener::{DialAddresses, GetSocketAddr, SocketListener, TcpAddress}, - manager::TransportHandle, - tcp::{ - config::Config, - connection::{NegotiatedConnection, TcpConnection}, - }, - Transport, TransportBuilder, TransportEvent, DIAL_DEADLINE_MULTIPLIER, - }, - types::ConnectionId, - utils::futures_stream::FuturesStream, + error::{DialError, Error}, + transport::{ + common::listener::{DialAddresses, GetSocketAddr, SocketListener, TcpAddress}, + manager::TransportHandle, + tcp::{ + config::Config, + connection::{NegotiatedConnection, TcpConnection}, + }, + Transport, TransportBuilder, TransportEvent, DIAL_DEADLINE_MULTIPLIER, + }, + types::ConnectionId, + utils::futures_stream::FuturesStream, }; use futures::{ - future::BoxFuture, - stream::{AbortHandle, Stream, StreamExt}, - TryFutureExt, + future::BoxFuture, + stream::{AbortHandle, Stream, StreamExt}, + TryFutureExt, }; use hickory_resolver::TokioResolver; use multiaddr::Multiaddr; @@ -47,12 +47,12 @@ use socket2::{Domain, Socket, Type}; use tokio::net::TcpStream; use std::{ - collections::HashMap, - net::SocketAddr, - pin::Pin, - sync::Arc, - task::{Context, Poll}, - time::Duration, + collections::HashMap, + net::SocketAddr, + pin::Pin, + sync::Arc, + task::{Context, Poll}, + time::Duration, }; pub(crate) use substream::Substream; @@ -67,1011 +67,974 @@ const LOG_TARGET: &str = "litep2p::tcp"; /// Pending inbound connection. struct PendingInboundConnection { - /// Socket address of the remote peer. - connection: TcpStream, - /// Address of the remote peer. - address: SocketAddr, + /// Socket address of the remote peer. + connection: TcpStream, + /// Address of the remote peer. + address: SocketAddr, } #[derive(Debug)] enum RawConnectionResult { - /// The first successful connection. - Connected { - negotiated: NegotiatedConnection, - errors: Vec<(Multiaddr, DialError)>, - }, - - /// All connection attempts failed. - Failed { - connection_id: ConnectionId, - errors: Vec<(Multiaddr, DialError)>, - }, - - /// Future was canceled. - Canceled { connection_id: ConnectionId }, + /// The first successful connection. + Connected { negotiated: NegotiatedConnection, errors: Vec<(Multiaddr, DialError)> }, + + /// All connection attempts failed. + Failed { connection_id: ConnectionId, errors: Vec<(Multiaddr, DialError)> }, + + /// Future was canceled. + Canceled { connection_id: ConnectionId }, } /// TCP transport. pub(crate) struct TcpTransport { - /// Transport context. - context: TransportHandle, + /// Transport context. + context: TransportHandle, - /// Transport configuration. - config: Config, + /// Transport configuration. + config: Config, - /// TCP listener. - listener: SocketListener, + /// TCP listener. + listener: SocketListener, - /// Pending dials. - pending_dials: HashMap, + /// Pending dials. + pending_dials: HashMap, - /// Dial addresses. - dial_addresses: DialAddresses, + /// Dial addresses. + dial_addresses: DialAddresses, - /// Pending inbound connections. - pending_inbound_connections: HashMap, + /// Pending inbound connections. + pending_inbound_connections: HashMap, - /// Pending opening connections. - pending_connections: - FuturesStream>>, + /// Pending opening connections. + pending_connections: + FuturesStream>>, - /// Pending raw, unnegotiated connections. - pending_raw_connections: FuturesStream>, + /// Pending raw, unnegotiated connections. + pending_raw_connections: FuturesStream>, - /// Opened raw connection, waiting for approval/rejection from `TransportManager`. - opened: HashMap, + /// Opened raw connection, waiting for approval/rejection from `TransportManager`. + opened: HashMap, - /// Cancel raw connections futures. - /// - /// This is cancelling `Self::pending_raw_connections`. - cancel_futures: HashMap, + /// Cancel raw connections futures. + /// + /// This is cancelling `Self::pending_raw_connections`. + cancel_futures: HashMap, - /// Connections which have been opened and negotiated but are being validated by the - /// `TransportManager`. - pending_open: HashMap, + /// Connections which have been opened and negotiated but are being validated by the + /// `TransportManager`. + pending_open: HashMap, - /// DNS resolver. - resolver: Arc, + /// DNS resolver. + resolver: Arc, } impl TcpTransport { - /// Handle inbound TCP connection. - fn on_inbound_connection( - &mut self, - connection_id: ConnectionId, - connection: TcpStream, - address: SocketAddr, - ) { - let yamux_config = self.config.yamux_config.clone(); - let max_read_ahead_factor = self.config.noise_read_ahead_frame_count; - let max_write_buffer_size = self.config.noise_write_buffer_size; - let connection_open_timeout = self.config.connection_open_timeout; - let substream_open_timeout = self.config.substream_open_timeout; - let keypair = self.context.keypair.clone(); - - tracing::trace!( - target: LOG_TARGET, - ?connection_id, - ?address, - "accept connection", - ); - - self.pending_connections.push(Box::pin(async move { - TcpConnection::accept_connection( - connection, - connection_id, - keypair, - address, - yamux_config, - max_read_ahead_factor, - max_write_buffer_size, - connection_open_timeout, - substream_open_timeout, - ) - .await - .map_err(|error| (connection_id, error.into())) - })); - } - - /// Dial remote peer - async fn dial_peer( - address: Multiaddr, - dial_addresses: DialAddresses, - connection_open_timeout: Duration, - nodelay: bool, - resolver: Arc, - ) -> Result<(Multiaddr, TcpStream), DialError> { - let (socket_address, _) = TcpAddress::multiaddr_to_socket_address(&address)?; - - let remote_address = - match tokio::time::timeout(connection_open_timeout, socket_address.lookup_ip(resolver)) - .await - { - Err(_) => { - tracing::debug!( - target: LOG_TARGET, - ?address, - ?connection_open_timeout, - "failed to resolve address within timeout", - ); - return Err(DialError::Timeout); - } - Ok(Err(error)) => return Err(error.into()), - Ok(Ok(address)) => address, - }; - - let domain = match remote_address.is_ipv4() { - true => Domain::IPV4, - false => Domain::IPV6, - }; - let socket = Socket::new(domain, Type::STREAM, Some(socket2::Protocol::TCP))?; - if remote_address.is_ipv6() { - socket.set_only_v6(true)?; - } - socket.set_nonblocking(true)?; - socket.set_nodelay(nodelay)?; - - match dial_addresses.local_dial_address(&remote_address.ip()) { - Ok(Some(dial_address)) => { - socket.set_reuse_address(true)?; - #[cfg(unix)] - socket.set_reuse_port(true)?; - socket.bind(&dial_address.into())?; - } - Ok(None) => {} - Err(()) => { - tracing::debug!( - target: LOG_TARGET, - ?remote_address, - "tcp listener not enabled for remote address, using ephemeral port", - ); - } - } - - let future = async move { - match socket.connect(&remote_address.into()) { - Ok(()) => {} - Err(err) if err.raw_os_error() == Some(libc::EINPROGRESS) => {} - Err(err) if err.kind() == std::io::ErrorKind::WouldBlock => {} - Err(err) => return Err(err), - } - - let stream = TcpStream::try_from(Into::::into(socket))?; - stream.writable().await?; - - if let Some(e) = stream.take_error()? { - return Err(e); - } - - Ok((address, stream)) - }; - - match tokio::time::timeout(connection_open_timeout, future).await { - Err(_) => { - tracing::debug!( - target: LOG_TARGET, - ?connection_open_timeout, - "failed to connect within timeout", - ); - Err(DialError::Timeout) - } - Ok(Err(error)) => Err(error.into()), - Ok(Ok((address, stream))) => { - tracing::debug!( - target: LOG_TARGET, - ?address, - "connected", - ); - - Ok((address, stream)) - } - } - } + /// Handle inbound TCP connection. + fn on_inbound_connection( + &mut self, + connection_id: ConnectionId, + connection: TcpStream, + address: SocketAddr, + ) { + let yamux_config = self.config.yamux_config.clone(); + let max_read_ahead_factor = self.config.noise_read_ahead_frame_count; + let max_write_buffer_size = self.config.noise_write_buffer_size; + let connection_open_timeout = self.config.connection_open_timeout; + let substream_open_timeout = self.config.substream_open_timeout; + let keypair = self.context.keypair.clone(); + + tracing::trace!( + target: LOG_TARGET, + ?connection_id, + ?address, + "accept connection", + ); + + self.pending_connections.push(Box::pin(async move { + TcpConnection::accept_connection( + connection, + connection_id, + keypair, + address, + yamux_config, + max_read_ahead_factor, + max_write_buffer_size, + connection_open_timeout, + substream_open_timeout, + ) + .await + .map_err(|error| (connection_id, error.into())) + })); + } + + /// Dial remote peer + async fn dial_peer( + address: Multiaddr, + dial_addresses: DialAddresses, + connection_open_timeout: Duration, + nodelay: bool, + resolver: Arc, + ) -> Result<(Multiaddr, TcpStream), DialError> { + let (socket_address, _) = TcpAddress::multiaddr_to_socket_address(&address)?; + + let remote_address = + match tokio::time::timeout(connection_open_timeout, socket_address.lookup_ip(resolver)) + .await + { + Err(_) => { + tracing::debug!( + target: LOG_TARGET, + ?address, + ?connection_open_timeout, + "failed to resolve address within timeout", + ); + return Err(DialError::Timeout); + }, + Ok(Err(error)) => return Err(error.into()), + Ok(Ok(address)) => address, + }; + + let domain = match remote_address.is_ipv4() { + true => Domain::IPV4, + false => Domain::IPV6, + }; + let socket = Socket::new(domain, Type::STREAM, Some(socket2::Protocol::TCP))?; + if remote_address.is_ipv6() { + socket.set_only_v6(true)?; + } + socket.set_nonblocking(true)?; + socket.set_nodelay(nodelay)?; + + match dial_addresses.local_dial_address(&remote_address.ip()) { + Ok(Some(dial_address)) => { + socket.set_reuse_address(true)?; + #[cfg(unix)] + socket.set_reuse_port(true)?; + socket.bind(&dial_address.into())?; + }, + Ok(None) => {}, + Err(()) => { + tracing::debug!( + target: LOG_TARGET, + ?remote_address, + "tcp listener not enabled for remote address, using ephemeral port", + ); + }, + } + + let future = async move { + match socket.connect(&remote_address.into()) { + Ok(()) => {}, + Err(err) if err.raw_os_error() == Some(libc::EINPROGRESS) => {}, + Err(err) if err.kind() == std::io::ErrorKind::WouldBlock => {}, + Err(err) => return Err(err), + } + + let stream = TcpStream::try_from(Into::::into(socket))?; + stream.writable().await?; + + if let Some(e) = stream.take_error()? { + return Err(e); + } + + Ok((address, stream)) + }; + + match tokio::time::timeout(connection_open_timeout, future).await { + Err(_) => { + tracing::debug!( + target: LOG_TARGET, + ?connection_open_timeout, + "failed to connect within timeout", + ); + Err(DialError::Timeout) + }, + Ok(Err(error)) => Err(error.into()), + Ok(Ok((address, stream))) => { + tracing::debug!( + target: LOG_TARGET, + ?address, + "connected", + ); + + Ok((address, stream)) + }, + } + } } impl TransportBuilder for TcpTransport { - type Config = Config; - type Transport = TcpTransport; - - /// Create new [`TcpTransport`]. - fn new( - context: TransportHandle, - mut config: Self::Config, - resolver: Arc, - ) -> crate::Result<(Self, Vec)> { - tracing::debug!( - target: LOG_TARGET, - listen_addresses = ?config.listen_addresses, - "start tcp transport", - ); - - // start tcp listeners for all listen addresses - let (listener, listen_addresses, dial_addresses) = SocketListener::new::( - std::mem::take(&mut config.listen_addresses), - config.reuse_port, - config.nodelay, - ); - - Ok(( - Self { - listener, - config, - context, - dial_addresses, - opened: HashMap::new(), - pending_open: HashMap::new(), - pending_dials: HashMap::new(), - pending_inbound_connections: HashMap::new(), - pending_connections: FuturesStream::new(), - pending_raw_connections: FuturesStream::new(), - cancel_futures: HashMap::new(), - resolver, - }, - listen_addresses, - )) - } + type Config = Config; + type Transport = TcpTransport; + + /// Create new [`TcpTransport`]. + fn new( + context: TransportHandle, + mut config: Self::Config, + resolver: Arc, + ) -> crate::Result<(Self, Vec)> { + tracing::debug!( + target: LOG_TARGET, + listen_addresses = ?config.listen_addresses, + "start tcp transport", + ); + + // start tcp listeners for all listen addresses + let (listener, listen_addresses, dial_addresses) = SocketListener::new::( + std::mem::take(&mut config.listen_addresses), + config.reuse_port, + config.nodelay, + ); + + Ok(( + Self { + listener, + config, + context, + dial_addresses, + opened: HashMap::new(), + pending_open: HashMap::new(), + pending_dials: HashMap::new(), + pending_inbound_connections: HashMap::new(), + pending_connections: FuturesStream::new(), + pending_raw_connections: FuturesStream::new(), + cancel_futures: HashMap::new(), + resolver, + }, + listen_addresses, + )) + } } impl Transport for TcpTransport { - fn dial(&mut self, connection_id: ConnectionId, address: Multiaddr) -> crate::Result<()> { - tracing::debug!(target: LOG_TARGET, ?connection_id, ?address, "open connection"); - - let (socket_address, peer) = TcpAddress::multiaddr_to_socket_address(&address)?; - let yamux_config = self.config.yamux_config.clone(); - let max_read_ahead_factor = self.config.noise_read_ahead_frame_count; - let max_write_buffer_size = self.config.noise_write_buffer_size; - let connection_open_timeout = self.config.connection_open_timeout; - let substream_open_timeout = self.config.substream_open_timeout; - let dial_addresses = self.dial_addresses.clone(); - let keypair = self.context.keypair.clone(); - let nodelay = self.config.nodelay; - let resolver = self.resolver.clone(); - - self.pending_dials.insert(connection_id, address.clone()); - self.pending_connections.push(Box::pin(async move { - let (_, stream) = TcpTransport::dial_peer( - address, - dial_addresses, - connection_open_timeout, - nodelay, - resolver, - ) - .await - .map_err(|error| (connection_id, error))?; - - TcpConnection::open_connection( - connection_id, - keypair, - stream, - socket_address, - peer, - yamux_config, - max_read_ahead_factor, - max_write_buffer_size, - connection_open_timeout, - substream_open_timeout, - ) - .await - .map_err(|error| (connection_id, error.into())) - })); - - Ok(()) - } - - fn accept_pending(&mut self, connection_id: ConnectionId) -> crate::Result<()> { - let pending = self.pending_inbound_connections.remove(&connection_id).ok_or_else(|| { - tracing::error!( - target: LOG_TARGET, - ?connection_id, - "Cannot accept non existent pending connection", - ); - - Error::ConnectionDoesntExist(connection_id) - })?; - - self.on_inbound_connection(connection_id, pending.connection, pending.address); - - Ok(()) - } - - fn reject_pending(&mut self, connection_id: ConnectionId) -> crate::Result<()> { - self.pending_inbound_connections.remove(&connection_id).map_or_else( - || { - tracing::error!( - target: LOG_TARGET, - ?connection_id, - "Cannot reject non existent pending connection", - ); - - Err(Error::ConnectionDoesntExist(connection_id)) - }, - |_| Ok(()), - ) - } - - fn accept( - &mut self, - connection_id: ConnectionId, - ) -> crate::Result>> { - let context = self - .pending_open - .remove(&connection_id) - .ok_or(Error::ConnectionDoesntExist(connection_id))?; - let mut protocol_set = self.context.protocol_set(connection_id); - let bandwidth_sink = self.context.bandwidth_sink.clone(); - let next_substream_id = self.context.next_substream_id.clone(); - let executor = self.context.executor.clone(); - - tracing::trace!( - target: LOG_TARGET, - ?connection_id, - "start connection", - ); - - let peer = context.peer(); - let endpoint = context.endpoint().clone(); - - Ok(Box::pin(async move { - // First, notify all protocols about the connection establishment - // This ensures that when the accept() future completes, protocols are ready - protocol_set.report_connection_established(peer, endpoint).await?; - - // After protocols are notified, spawn the connection event loop - executor.run(Box::pin(async move { - if let Err(error) = - TcpConnection::new(context, protocol_set, bandwidth_sink, next_substream_id) - .start() - .await - { - tracing::debug!( - target: LOG_TARGET, - ?connection_id, - ?error, - "connection exited with error", - ); - } - })); - - Ok(()) - })) - } - - fn reject(&mut self, connection_id: ConnectionId) -> crate::Result<()> { - self.pending_open - .remove(&connection_id) - .map_or(Err(Error::ConnectionDoesntExist(connection_id)), |_| Ok(())) - } - - fn open( - &mut self, - connection_id: ConnectionId, - addresses: Vec, - ) -> crate::Result<()> { - let num_addresses = addresses.len(); - - let yamux_config = self.config.yamux_config.clone(); - let max_read_ahead_factor = self.config.noise_read_ahead_frame_count; - let max_write_buffer_size = self.config.noise_write_buffer_size; - let connection_open_timeout = self.config.connection_open_timeout; - let substream_open_timeout = self.config.substream_open_timeout; - let max_parallel_dials = self.config.max_parallel_dials; - let dial_addresses = self.dial_addresses.clone(); - let keypair = self.context.keypair.clone(); - let nodelay = self.config.nodelay; - let resolver = self.resolver.clone(); - - let futures = futures::stream::iter(addresses.into_iter().map(move |address| { - let yamux_config = yamux_config.clone(); - let dial_addresses = dial_addresses.clone(); - let keypair = keypair.clone(); - let resolver = resolver.clone(); - - async move { - let (address, stream) = TcpTransport::dial_peer( - address.clone(), - dial_addresses, - connection_open_timeout, - nodelay, - resolver, - ) - .await - .map_err(|error| (address, error))?; - - let open_address = address.clone(); - let (socket_address, peer) = TcpAddress::multiaddr_to_socket_address(&address) - .map_err(|error| (address, error.into()))?; - - TcpConnection::open_connection( - connection_id, - keypair, - stream, - socket_address, - peer, - yamux_config, - max_read_ahead_factor, - max_write_buffer_size, - connection_open_timeout, - substream_open_timeout, - ) - .await - .map_err(|error| (open_address, error.into())) - } - })) - .buffer_unordered(max_parallel_dials); - - // Future that will resolve to the first successful connection. - let future = async move { - let mut errors = Vec::with_capacity(num_addresses); - // Deadline for the overall dial attempt, including all retries. This is to prevent - // retry attempts from indefinitely delaying the dial result. - let dial_deadline = DIAL_DEADLINE_MULTIPLIER * connection_open_timeout; - let deadline = tokio::time::sleep(dial_deadline); - - tokio::pin!(deadline); - tokio::pin!(futures); - - loop { - tokio::select! { - result = futures.next() => { - match result { - Some(Ok(negotiated)) => { - return RawConnectionResult::Connected { - negotiated, - errors, - }; - } - Some(Err(error)) => { - tracing::debug!( - target: LOG_TARGET, - ?connection_id, - ?error, - "failed to open connection", - ); - errors.push(error); - } - None => { - return RawConnectionResult::Failed { - connection_id, - errors, - }; - } - } - } - _ = &mut deadline => { - tracing::debug!( - target: LOG_TARGET, - ?connection_id, - ?dial_deadline, - "overall dial timeout exceeded", - ); - return RawConnectionResult::Failed { - connection_id, - errors, - }; - } - } - } - }; - - let (fut, handle) = futures::future::abortable(future); - let fut = fut.unwrap_or_else(move |_| RawConnectionResult::Canceled { connection_id }); - self.pending_raw_connections.push(Box::pin(fut)); - self.cancel_futures.insert(connection_id, handle); - - Ok(()) - } - - fn negotiate(&mut self, connection_id: ConnectionId) -> crate::Result<()> { - let negotiated = self - .opened - .remove(&connection_id) - .ok_or(Error::ConnectionDoesntExist(connection_id))?; - - self.pending_connections.push(Box::pin(async move { Ok(negotiated) })); - - Ok(()) - } - - fn cancel(&mut self, connection_id: ConnectionId) { - // Cancel the future if it exists. - // State clean-up happens inside the `poll_next`. - if let Some(handle) = self.cancel_futures.get(&connection_id) { - handle.abort(); - } - } + fn dial(&mut self, connection_id: ConnectionId, address: Multiaddr) -> crate::Result<()> { + tracing::debug!(target: LOG_TARGET, ?connection_id, ?address, "open connection"); + + let (socket_address, peer) = TcpAddress::multiaddr_to_socket_address(&address)?; + let yamux_config = self.config.yamux_config.clone(); + let max_read_ahead_factor = self.config.noise_read_ahead_frame_count; + let max_write_buffer_size = self.config.noise_write_buffer_size; + let connection_open_timeout = self.config.connection_open_timeout; + let substream_open_timeout = self.config.substream_open_timeout; + let dial_addresses = self.dial_addresses.clone(); + let keypair = self.context.keypair.clone(); + let nodelay = self.config.nodelay; + let resolver = self.resolver.clone(); + + self.pending_dials.insert(connection_id, address.clone()); + self.pending_connections.push(Box::pin(async move { + let (_, stream) = TcpTransport::dial_peer( + address, + dial_addresses, + connection_open_timeout, + nodelay, + resolver, + ) + .await + .map_err(|error| (connection_id, error))?; + + TcpConnection::open_connection( + connection_id, + keypair, + stream, + socket_address, + peer, + yamux_config, + max_read_ahead_factor, + max_write_buffer_size, + connection_open_timeout, + substream_open_timeout, + ) + .await + .map_err(|error| (connection_id, error.into())) + })); + + Ok(()) + } + + fn accept_pending(&mut self, connection_id: ConnectionId) -> crate::Result<()> { + let pending = self.pending_inbound_connections.remove(&connection_id).ok_or_else(|| { + tracing::error!( + target: LOG_TARGET, + ?connection_id, + "Cannot accept non existent pending connection", + ); + + Error::ConnectionDoesntExist(connection_id) + })?; + + self.on_inbound_connection(connection_id, pending.connection, pending.address); + + Ok(()) + } + + fn reject_pending(&mut self, connection_id: ConnectionId) -> crate::Result<()> { + self.pending_inbound_connections.remove(&connection_id).map_or_else( + || { + tracing::error!( + target: LOG_TARGET, + ?connection_id, + "Cannot reject non existent pending connection", + ); + + Err(Error::ConnectionDoesntExist(connection_id)) + }, + |_| Ok(()), + ) + } + + fn accept( + &mut self, + connection_id: ConnectionId, + ) -> crate::Result>> { + let context = self + .pending_open + .remove(&connection_id) + .ok_or(Error::ConnectionDoesntExist(connection_id))?; + let mut protocol_set = self.context.protocol_set(connection_id); + let bandwidth_sink = self.context.bandwidth_sink.clone(); + let next_substream_id = self.context.next_substream_id.clone(); + let executor = self.context.executor.clone(); + + tracing::trace!( + target: LOG_TARGET, + ?connection_id, + "start connection", + ); + + let peer = context.peer(); + let endpoint = context.endpoint().clone(); + + Ok(Box::pin(async move { + // First, notify all protocols about the connection establishment + // This ensures that when the accept() future completes, protocols are ready + protocol_set.report_connection_established(peer, endpoint).await?; + + // After protocols are notified, spawn the connection event loop + executor.run(Box::pin(async move { + if let Err(error) = + TcpConnection::new(context, protocol_set, bandwidth_sink, next_substream_id) + .start() + .await + { + tracing::debug!( + target: LOG_TARGET, + ?connection_id, + ?error, + "connection exited with error", + ); + } + })); + + Ok(()) + })) + } + + fn reject(&mut self, connection_id: ConnectionId) -> crate::Result<()> { + self.pending_open + .remove(&connection_id) + .map_or(Err(Error::ConnectionDoesntExist(connection_id)), |_| Ok(())) + } + + fn open( + &mut self, + connection_id: ConnectionId, + addresses: Vec, + ) -> crate::Result<()> { + let num_addresses = addresses.len(); + + let yamux_config = self.config.yamux_config.clone(); + let max_read_ahead_factor = self.config.noise_read_ahead_frame_count; + let max_write_buffer_size = self.config.noise_write_buffer_size; + let connection_open_timeout = self.config.connection_open_timeout; + let substream_open_timeout = self.config.substream_open_timeout; + let max_parallel_dials = self.config.max_parallel_dials; + let dial_addresses = self.dial_addresses.clone(); + let keypair = self.context.keypair.clone(); + let nodelay = self.config.nodelay; + let resolver = self.resolver.clone(); + + let futures = futures::stream::iter(addresses.into_iter().map(move |address| { + let yamux_config = yamux_config.clone(); + let dial_addresses = dial_addresses.clone(); + let keypair = keypair.clone(); + let resolver = resolver.clone(); + + async move { + let (address, stream) = TcpTransport::dial_peer( + address.clone(), + dial_addresses, + connection_open_timeout, + nodelay, + resolver, + ) + .await + .map_err(|error| (address, error))?; + + let open_address = address.clone(); + let (socket_address, peer) = TcpAddress::multiaddr_to_socket_address(&address) + .map_err(|error| (address, error.into()))?; + + TcpConnection::open_connection( + connection_id, + keypair, + stream, + socket_address, + peer, + yamux_config, + max_read_ahead_factor, + max_write_buffer_size, + connection_open_timeout, + substream_open_timeout, + ) + .await + .map_err(|error| (open_address, error.into())) + } + })) + .buffer_unordered(max_parallel_dials); + + // Future that will resolve to the first successful connection. + let future = async move { + let mut errors = Vec::with_capacity(num_addresses); + // Deadline for the overall dial attempt, including all retries. This is to prevent + // retry attempts from indefinitely delaying the dial result. + let dial_deadline = DIAL_DEADLINE_MULTIPLIER * connection_open_timeout; + let deadline = tokio::time::sleep(dial_deadline); + + tokio::pin!(deadline); + tokio::pin!(futures); + + loop { + tokio::select! { + result = futures.next() => { + match result { + Some(Ok(negotiated)) => { + return RawConnectionResult::Connected { + negotiated, + errors, + }; + } + Some(Err(error)) => { + tracing::debug!( + target: LOG_TARGET, + ?connection_id, + ?error, + "failed to open connection", + ); + errors.push(error); + } + None => { + return RawConnectionResult::Failed { + connection_id, + errors, + }; + } + } + } + _ = &mut deadline => { + tracing::debug!( + target: LOG_TARGET, + ?connection_id, + ?dial_deadline, + "overall dial timeout exceeded", + ); + return RawConnectionResult::Failed { + connection_id, + errors, + }; + } + } + } + }; + + let (fut, handle) = futures::future::abortable(future); + let fut = fut.unwrap_or_else(move |_| RawConnectionResult::Canceled { connection_id }); + self.pending_raw_connections.push(Box::pin(fut)); + self.cancel_futures.insert(connection_id, handle); + + Ok(()) + } + + fn negotiate(&mut self, connection_id: ConnectionId) -> crate::Result<()> { + let negotiated = self + .opened + .remove(&connection_id) + .ok_or(Error::ConnectionDoesntExist(connection_id))?; + + self.pending_connections.push(Box::pin(async move { Ok(negotiated) })); + + Ok(()) + } + + fn cancel(&mut self, connection_id: ConnectionId) { + // Cancel the future if it exists. + // State clean-up happens inside the `poll_next`. + if let Some(handle) = self.cancel_futures.get(&connection_id) { + handle.abort(); + } + } } impl Stream for TcpTransport { - type Item = TransportEvent; - - fn poll_next(mut self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll> { - if let Poll::Ready(event) = self.listener.poll_next_unpin(cx) { - return match event { - None => { - tracing::error!( - target: LOG_TARGET, - "TCP listener terminated, ignore if the node is stopping", - ); - - Poll::Ready(None) - } - Some(Err(error)) => { - tracing::error!( - target: LOG_TARGET, - ?error, - "TCP listener terminated with error", - ); - - Poll::Ready(None) - } - Some(Ok((connection, address))) => { - let connection_id = self.context.next_connection_id(); - tracing::trace!( - target: LOG_TARGET, - ?connection_id, - ?address, - "pending inbound TCP connection", - ); - - self.pending_inbound_connections.insert( - connection_id, - PendingInboundConnection { - connection, - address, - }, - ); - - Poll::Ready(Some(TransportEvent::PendingInboundConnection { - connection_id, - })) - } - }; - } - - while let Poll::Ready(Some(result)) = self.pending_raw_connections.poll_next_unpin(cx) { - tracing::trace!(target: LOG_TARGET, ?result, "raw connection result"); - - match result { - RawConnectionResult::Connected { negotiated, errors } => { - let Some(handle) = self.cancel_futures.remove(&negotiated.connection_id()) - else { - tracing::warn!( - target: LOG_TARGET, - connection_id = ?negotiated.connection_id(), - address = ?negotiated.endpoint().address(), - ?errors, - "raw connection without a cancel handle", - ); - continue; - }; - - if !handle.is_aborted() { - let connection_id = negotiated.connection_id(); - let address = negotiated.endpoint().address().clone(); - - self.opened.insert(connection_id, negotiated); - - return Poll::Ready(Some(TransportEvent::ConnectionOpened { - connection_id, - address, - errors, - })); - } - } - - RawConnectionResult::Failed { - connection_id, - errors, - } => { - let Some(handle) = self.cancel_futures.remove(&connection_id) else { - tracing::warn!( - target: LOG_TARGET, - ?connection_id, - ?errors, - "raw connection without a cancel handle", - ); - continue; - }; - - if !handle.is_aborted() { - return Poll::Ready(Some(TransportEvent::OpenFailure { - connection_id, - errors, - })); - } - } - RawConnectionResult::Canceled { connection_id } => { - if self.cancel_futures.remove(&connection_id).is_none() { - tracing::warn!( - target: LOG_TARGET, - ?connection_id, - "raw cancelled connection without a cancel handle", - ); - } - } - } - } - - while let Poll::Ready(Some(connection)) = self.pending_connections.poll_next_unpin(cx) { - match connection { - Ok(connection) => { - let peer = connection.peer(); - let endpoint = connection.endpoint(); - self.pending_dials.remove(&connection.connection_id()); - self.pending_open.insert(connection.connection_id(), connection); - - return Poll::Ready(Some(TransportEvent::ConnectionEstablished { - peer, - endpoint, - })); - } - Err((connection_id, error)) => { - if let Some(address) = self.pending_dials.remove(&connection_id) { - return Poll::Ready(Some(TransportEvent::DialFailure { - connection_id, - address, - error, - })); - } else { - tracing::debug!(target: LOG_TARGET, ?error, ?connection_id, "Pending inbound connection failed"); - } - } - } - } - - Poll::Pending - } + type Item = TransportEvent; + + fn poll_next(mut self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll> { + if let Poll::Ready(event) = self.listener.poll_next_unpin(cx) { + return match event { + None => { + tracing::error!( + target: LOG_TARGET, + "TCP listener terminated, ignore if the node is stopping", + ); + + Poll::Ready(None) + }, + Some(Err(error)) => { + tracing::error!( + target: LOG_TARGET, + ?error, + "TCP listener terminated with error", + ); + + Poll::Ready(None) + }, + Some(Ok((connection, address))) => { + let connection_id = self.context.next_connection_id(); + tracing::trace!( + target: LOG_TARGET, + ?connection_id, + ?address, + "pending inbound TCP connection", + ); + + self.pending_inbound_connections + .insert(connection_id, PendingInboundConnection { connection, address }); + + Poll::Ready(Some(TransportEvent::PendingInboundConnection { connection_id })) + }, + }; + } + + while let Poll::Ready(Some(result)) = self.pending_raw_connections.poll_next_unpin(cx) { + tracing::trace!(target: LOG_TARGET, ?result, "raw connection result"); + + match result { + RawConnectionResult::Connected { negotiated, errors } => { + let Some(handle) = self.cancel_futures.remove(&negotiated.connection_id()) + else { + tracing::warn!( + target: LOG_TARGET, + connection_id = ?negotiated.connection_id(), + address = ?negotiated.endpoint().address(), + ?errors, + "raw connection without a cancel handle", + ); + continue; + }; + + if !handle.is_aborted() { + let connection_id = negotiated.connection_id(); + let address = negotiated.endpoint().address().clone(); + + self.opened.insert(connection_id, negotiated); + + return Poll::Ready(Some(TransportEvent::ConnectionOpened { + connection_id, + address, + errors, + })); + } + }, + + RawConnectionResult::Failed { connection_id, errors } => { + let Some(handle) = self.cancel_futures.remove(&connection_id) else { + tracing::warn!( + target: LOG_TARGET, + ?connection_id, + ?errors, + "raw connection without a cancel handle", + ); + continue; + }; + + if !handle.is_aborted() { + return Poll::Ready(Some(TransportEvent::OpenFailure { + connection_id, + errors, + })); + } + }, + RawConnectionResult::Canceled { connection_id } => { + if self.cancel_futures.remove(&connection_id).is_none() { + tracing::warn!( + target: LOG_TARGET, + ?connection_id, + "raw cancelled connection without a cancel handle", + ); + } + }, + } + } + + while let Poll::Ready(Some(connection)) = self.pending_connections.poll_next_unpin(cx) { + match connection { + Ok(connection) => { + let peer = connection.peer(); + let endpoint = connection.endpoint(); + self.pending_dials.remove(&connection.connection_id()); + self.pending_open.insert(connection.connection_id(), connection); + + return Poll::Ready(Some(TransportEvent::ConnectionEstablished { + peer, + endpoint, + })); + }, + Err((connection_id, error)) => { + if let Some(address) = self.pending_dials.remove(&connection_id) { + return Poll::Ready(Some(TransportEvent::DialFailure { + connection_id, + address, + error, + })); + } else { + tracing::debug!(target: LOG_TARGET, ?error, ?connection_id, "Pending inbound connection failed"); + } + }, + } + } + + Poll::Pending + } } #[cfg(test)] mod tests { - use super::*; - use crate::{ - codec::ProtocolCodec, - crypto::dilithium::Keypair, - executor::DefaultExecutor, - protocol::SubstreamKeepAlive, - transport::manager::{ProtocolContext, SupportedTransport, TransportManagerBuilder}, - types::protocol::ProtocolName, - BandwidthSink, PeerId, - }; - use multiaddr::Protocol; - use multihash::Multihash; - use std::sync::Arc; - use tokio::sync::mpsc::channel; - - #[tokio::test] - async fn connect_and_accept_works() { - let _ = tracing_subscriber::fmt() - .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) - .try_init(); - - let keypair1 = Keypair::generate(); - let (tx1, _rx1) = channel(64); - let (event_tx1, _event_rx1) = channel(64); - let bandwidth_sink = BandwidthSink::new(); - - let handle1 = crate::transport::manager::TransportHandle { - executor: Arc::new(DefaultExecutor {}), - next_substream_id: Default::default(), - next_connection_id: Default::default(), - keypair: keypair1.clone(), - tx: event_tx1, - bandwidth_sink: bandwidth_sink.clone(), - - protocols: HashMap::from_iter([( - ProtocolName::from("/notif/1"), - ProtocolContext { - tx: tx1, - codec: ProtocolCodec::Identity(32), - fallback_names: Vec::new(), - keep_alive: SubstreamKeepAlive::Yes, - }, - )]), - }; - let transport_config1 = Config { - listen_addresses: vec!["/ip6/::1/tcp/0".parse().unwrap()], - ..Default::default() - }; - let resolver = Arc::new(TokioResolver::builder_tokio().unwrap().build()); - - let (mut transport1, listen_addresses) = - TcpTransport::new(handle1, transport_config1, resolver.clone()).unwrap(); - let listen_address = listen_addresses[0].clone(); - - let keypair2 = Keypair::generate(); - let (tx2, _rx2) = channel(64); - let (event_tx2, _event_rx2) = channel(64); - - let handle2 = crate::transport::manager::TransportHandle { - executor: Arc::new(DefaultExecutor {}), - next_substream_id: Default::default(), - next_connection_id: Default::default(), - keypair: keypair2.clone(), - tx: event_tx2, - bandwidth_sink: bandwidth_sink.clone(), - - protocols: HashMap::from_iter([( - ProtocolName::from("/notif/1"), - ProtocolContext { - tx: tx2, - codec: ProtocolCodec::Identity(32), - fallback_names: Vec::new(), - keep_alive: SubstreamKeepAlive::Yes, - }, - )]), - }; - let transport_config2 = Config { - listen_addresses: vec!["/ip6/::1/tcp/0".parse().unwrap()], - ..Default::default() - }; - - let (mut transport2, _) = TcpTransport::new(handle2, transport_config2, resolver).unwrap(); - transport2.dial(ConnectionId::new(), listen_address).unwrap(); - - let (tx, mut from_transport2) = channel(64); - tokio::spawn(async move { - let event = transport2.next().await; - tx.send(event).await.unwrap(); - }); - - let event = transport1.next().await.unwrap(); - match event { - TransportEvent::PendingInboundConnection { connection_id } => { - transport1.accept_pending(connection_id).unwrap(); - } - _ => panic!("unexpected event"), - } - - let event = transport1.next().await; - assert!(std::matches!( - event, - Some(TransportEvent::ConnectionEstablished { .. }) - )); - - let event = from_transport2.recv().await.unwrap(); - assert!(std::matches!( - event, - Some(TransportEvent::ConnectionEstablished { .. }) - )); - } - - #[tokio::test] - async fn connect_and_reject_works() { - let _ = tracing_subscriber::fmt() - .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) - .try_init(); - - let keypair1 = Keypair::generate(); - let (tx1, _rx1) = channel(64); - let (event_tx1, _event_rx1) = channel(64); - let bandwidth_sink = BandwidthSink::new(); - - let handle1 = crate::transport::manager::TransportHandle { - executor: Arc::new(DefaultExecutor {}), - next_substream_id: Default::default(), - next_connection_id: Default::default(), - keypair: keypair1.clone(), - tx: event_tx1, - bandwidth_sink: bandwidth_sink.clone(), - - protocols: HashMap::from_iter([( - ProtocolName::from("/notif/1"), - ProtocolContext { - tx: tx1, - codec: ProtocolCodec::Identity(32), - fallback_names: Vec::new(), - keep_alive: SubstreamKeepAlive::Yes, - }, - )]), - }; - let transport_config1 = Config { - listen_addresses: vec!["/ip6/::1/tcp/0".parse().unwrap()], - ..Default::default() - }; - let resolver = Arc::new(TokioResolver::builder_tokio().unwrap().build()); - - let (mut transport1, listen_addresses) = - TcpTransport::new(handle1, transport_config1, resolver.clone()).unwrap(); - let listen_address = listen_addresses[0].clone(); - - let keypair2 = Keypair::generate(); - let (tx2, _rx2) = channel(64); - let (event_tx2, _event_rx2) = channel(64); - - let handle2 = crate::transport::manager::TransportHandle { - executor: Arc::new(DefaultExecutor {}), - next_substream_id: Default::default(), - next_connection_id: Default::default(), - keypair: keypair2.clone(), - tx: event_tx2, - bandwidth_sink: bandwidth_sink.clone(), - - protocols: HashMap::from_iter([( - ProtocolName::from("/notif/1"), - ProtocolContext { - tx: tx2, - codec: ProtocolCodec::Identity(32), - fallback_names: Vec::new(), - keep_alive: SubstreamKeepAlive::Yes, - }, - )]), - }; - let transport_config2 = Config { - listen_addresses: vec!["/ip6/::1/tcp/0".parse().unwrap()], - ..Default::default() - }; - - let (mut transport2, _) = TcpTransport::new(handle2, transport_config2, resolver).unwrap(); - transport2.dial(ConnectionId::new(), listen_address).unwrap(); - - let (tx, mut from_transport2) = channel(64); - tokio::spawn(async move { - let event = transport2.next().await; - tx.send(event).await.unwrap(); - }); - - // Reject connection. - let event = transport1.next().await.unwrap(); - match event { - TransportEvent::PendingInboundConnection { connection_id } => { - transport1.reject_pending(connection_id).unwrap(); - } - _ => panic!("unexpected event"), - } - - let event = from_transport2.recv().await.unwrap(); - assert!(std::matches!( - event, - Some(TransportEvent::DialFailure { .. }) - )); - } - - #[tokio::test] - async fn dial_failure() { - let _ = tracing_subscriber::fmt() - .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) - .try_init(); - - let keypair1 = Keypair::generate(); - let (tx1, _rx1) = channel(64); - let (event_tx1, mut event_rx1) = channel(64); - let bandwidth_sink = BandwidthSink::new(); - - let handle1 = crate::transport::manager::TransportHandle { - executor: Arc::new(DefaultExecutor {}), - next_substream_id: Default::default(), - next_connection_id: Default::default(), - keypair: keypair1.clone(), - tx: event_tx1, - bandwidth_sink: bandwidth_sink.clone(), - - protocols: HashMap::from_iter([( - ProtocolName::from("/notif/1"), - ProtocolContext { - tx: tx1, - codec: ProtocolCodec::Identity(32), - fallback_names: Vec::new(), - keep_alive: SubstreamKeepAlive::Yes, - }, - )]), - }; - let resolver = Arc::new(TokioResolver::builder_tokio().unwrap().build()); - let (mut transport1, _) = - TcpTransport::new(handle1, Default::default(), resolver.clone()).unwrap(); - - tokio::spawn(async move { - while let Some(event) = transport1.next().await { - match event { - TransportEvent::ConnectionEstablished { .. } => {} - TransportEvent::ConnectionClosed { .. } => {} - TransportEvent::DialFailure { .. } => {} - TransportEvent::ConnectionOpened { .. } => {} - TransportEvent::OpenFailure { .. } => {} - TransportEvent::PendingInboundConnection { .. } => {} - } - } - }); - - let keypair2 = Keypair::generate(); - let (tx2, _rx2) = channel(64); - let (event_tx2, _event_rx2) = channel(64); - - let handle2 = crate::transport::manager::TransportHandle { - executor: Arc::new(DefaultExecutor {}), - next_substream_id: Default::default(), - next_connection_id: Default::default(), - keypair: keypair2.clone(), - tx: event_tx2, - bandwidth_sink: bandwidth_sink.clone(), - - protocols: HashMap::from_iter([( - ProtocolName::from("/notif/1"), - ProtocolContext { - tx: tx2, - codec: ProtocolCodec::Identity(32), - fallback_names: Vec::new(), - keep_alive: SubstreamKeepAlive::Yes, - }, - )]), - }; - - let (mut transport2, _) = TcpTransport::new(handle2, Default::default(), resolver).unwrap(); - - let peer1: PeerId = PeerId::from_public_key(&keypair1.public().into()); - let peer2: PeerId = PeerId::from_public_key(&keypair2.public().into()); - - tracing::info!(target: LOG_TARGET, "peer1 {peer1}, peer2 {peer2}"); - - let address = Multiaddr::empty() - .with(Protocol::Ip6(std::net::Ipv6Addr::new( - 0, 0, 0, 0, 0, 0, 0, 1, - ))) - .with(Protocol::Tcp(8888)) - .with(Protocol::P2p( - Multihash::from_bytes(&peer1.to_bytes()).unwrap(), - )); - - transport2.dial(ConnectionId::new(), address).unwrap(); - - // spawn the other connection in the background as it won't return anything - tokio::spawn(async move { - loop { - let _ = event_rx1.recv().await; - } - }); - - assert!(std::matches!( - transport2.next().await, - Some(TransportEvent::DialFailure { .. }) - )); - } - - #[tokio::test] - async fn dial_error_reported_for_outbound_connections() { - let mut manager = TransportManagerBuilder::new().build(); - let handle = manager.transport_handle(Arc::new(DefaultExecutor {})); - let resolver = Arc::new(TokioResolver::builder_tokio().unwrap().build()); - manager.register_transport( - SupportedTransport::Tcp, - Box::new(crate::transport::dummy::DummyTransport::new()), - ); - let (mut transport, _) = TcpTransport::new( - handle, - Config { - listen_addresses: vec!["/ip4/127.0.0.1/tcp/0".parse().unwrap()], - ..Default::default() - }, - resolver, - ) - .unwrap(); - - let keypair = Keypair::generate(); - let peer_id = PeerId::from_public_key(&keypair.public().into()); - let multiaddr = Multiaddr::empty() - .with(Protocol::Ip4(std::net::Ipv4Addr::new(255, 254, 253, 252))) - .with(Protocol::Tcp(8888)) - .with(Protocol::P2p( - Multihash::from_bytes(&peer_id.to_bytes()).unwrap(), - )); - manager.dial_address(multiaddr.clone()).await.unwrap(); - - assert!(transport.pending_dials.is_empty()); - - match transport.dial(ConnectionId::from(0usize), multiaddr) { - Ok(()) => {} - _ => panic!("invalid result for `on_dial_peer()`"), - } - - assert!(!transport.pending_dials.is_empty()); - transport.pending_connections.push(Box::pin(async move { - Err((ConnectionId::from(0usize), DialError::Timeout)) - })); - - assert!(std::matches!( - transport.next().await, - Some(TransportEvent::DialFailure { .. }) - )); - assert!(transport.pending_dials.is_empty()); - } + use super::*; + use crate::{ + codec::ProtocolCodec, + crypto::dilithium::Keypair, + executor::DefaultExecutor, + protocol::SubstreamKeepAlive, + transport::manager::{ProtocolContext, SupportedTransport, TransportManagerBuilder}, + types::protocol::ProtocolName, + BandwidthSink, PeerId, + }; + use multiaddr::Protocol; + use multihash::Multihash; + use std::sync::Arc; + use tokio::sync::mpsc::channel; + + #[tokio::test] + async fn connect_and_accept_works() { + let _ = tracing_subscriber::fmt() + .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) + .try_init(); + + let keypair1 = Keypair::generate(); + let (tx1, _rx1) = channel(64); + let (event_tx1, _event_rx1) = channel(64); + let bandwidth_sink = BandwidthSink::new(); + + let handle1 = crate::transport::manager::TransportHandle { + executor: Arc::new(DefaultExecutor {}), + next_substream_id: Default::default(), + next_connection_id: Default::default(), + keypair: keypair1.clone(), + tx: event_tx1, + bandwidth_sink: bandwidth_sink.clone(), + + protocols: HashMap::from_iter([( + ProtocolName::from("/notif/1"), + ProtocolContext { + tx: tx1, + codec: ProtocolCodec::Identity(32), + fallback_names: Vec::new(), + keep_alive: SubstreamKeepAlive::Yes, + }, + )]), + }; + let transport_config1 = Config { + listen_addresses: vec!["/ip6/::1/tcp/0".parse().unwrap()], + ..Default::default() + }; + let resolver = Arc::new(TokioResolver::builder_tokio().unwrap().build()); + + let (mut transport1, listen_addresses) = + TcpTransport::new(handle1, transport_config1, resolver.clone()).unwrap(); + let listen_address = listen_addresses[0].clone(); + + let keypair2 = Keypair::generate(); + let (tx2, _rx2) = channel(64); + let (event_tx2, _event_rx2) = channel(64); + + let handle2 = crate::transport::manager::TransportHandle { + executor: Arc::new(DefaultExecutor {}), + next_substream_id: Default::default(), + next_connection_id: Default::default(), + keypair: keypair2.clone(), + tx: event_tx2, + bandwidth_sink: bandwidth_sink.clone(), + + protocols: HashMap::from_iter([( + ProtocolName::from("/notif/1"), + ProtocolContext { + tx: tx2, + codec: ProtocolCodec::Identity(32), + fallback_names: Vec::new(), + keep_alive: SubstreamKeepAlive::Yes, + }, + )]), + }; + let transport_config2 = Config { + listen_addresses: vec!["/ip6/::1/tcp/0".parse().unwrap()], + ..Default::default() + }; + + let (mut transport2, _) = TcpTransport::new(handle2, transport_config2, resolver).unwrap(); + transport2.dial(ConnectionId::new(), listen_address).unwrap(); + + let (tx, mut from_transport2) = channel(64); + tokio::spawn(async move { + let event = transport2.next().await; + tx.send(event).await.unwrap(); + }); + + let event = transport1.next().await.unwrap(); + match event { + TransportEvent::PendingInboundConnection { connection_id } => { + transport1.accept_pending(connection_id).unwrap(); + }, + _ => panic!("unexpected event"), + } + + let event = transport1.next().await; + assert!(std::matches!(event, Some(TransportEvent::ConnectionEstablished { .. }))); + + let event = from_transport2.recv().await.unwrap(); + assert!(std::matches!(event, Some(TransportEvent::ConnectionEstablished { .. }))); + } + + #[tokio::test] + async fn connect_and_reject_works() { + let _ = tracing_subscriber::fmt() + .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) + .try_init(); + + let keypair1 = Keypair::generate(); + let (tx1, _rx1) = channel(64); + let (event_tx1, _event_rx1) = channel(64); + let bandwidth_sink = BandwidthSink::new(); + + let handle1 = crate::transport::manager::TransportHandle { + executor: Arc::new(DefaultExecutor {}), + next_substream_id: Default::default(), + next_connection_id: Default::default(), + keypair: keypair1.clone(), + tx: event_tx1, + bandwidth_sink: bandwidth_sink.clone(), + + protocols: HashMap::from_iter([( + ProtocolName::from("/notif/1"), + ProtocolContext { + tx: tx1, + codec: ProtocolCodec::Identity(32), + fallback_names: Vec::new(), + keep_alive: SubstreamKeepAlive::Yes, + }, + )]), + }; + let transport_config1 = Config { + listen_addresses: vec!["/ip6/::1/tcp/0".parse().unwrap()], + ..Default::default() + }; + let resolver = Arc::new(TokioResolver::builder_tokio().unwrap().build()); + + let (mut transport1, listen_addresses) = + TcpTransport::new(handle1, transport_config1, resolver.clone()).unwrap(); + let listen_address = listen_addresses[0].clone(); + + let keypair2 = Keypair::generate(); + let (tx2, _rx2) = channel(64); + let (event_tx2, _event_rx2) = channel(64); + + let handle2 = crate::transport::manager::TransportHandle { + executor: Arc::new(DefaultExecutor {}), + next_substream_id: Default::default(), + next_connection_id: Default::default(), + keypair: keypair2.clone(), + tx: event_tx2, + bandwidth_sink: bandwidth_sink.clone(), + + protocols: HashMap::from_iter([( + ProtocolName::from("/notif/1"), + ProtocolContext { + tx: tx2, + codec: ProtocolCodec::Identity(32), + fallback_names: Vec::new(), + keep_alive: SubstreamKeepAlive::Yes, + }, + )]), + }; + let transport_config2 = Config { + listen_addresses: vec!["/ip6/::1/tcp/0".parse().unwrap()], + ..Default::default() + }; + + let (mut transport2, _) = TcpTransport::new(handle2, transport_config2, resolver).unwrap(); + transport2.dial(ConnectionId::new(), listen_address).unwrap(); + + let (tx, mut from_transport2) = channel(64); + tokio::spawn(async move { + let event = transport2.next().await; + tx.send(event).await.unwrap(); + }); + + // Reject connection. + let event = transport1.next().await.unwrap(); + match event { + TransportEvent::PendingInboundConnection { connection_id } => { + transport1.reject_pending(connection_id).unwrap(); + }, + _ => panic!("unexpected event"), + } + + let event = from_transport2.recv().await.unwrap(); + assert!(std::matches!(event, Some(TransportEvent::DialFailure { .. }))); + } + + #[tokio::test] + async fn dial_failure() { + let _ = tracing_subscriber::fmt() + .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) + .try_init(); + + let keypair1 = Keypair::generate(); + let (tx1, _rx1) = channel(64); + let (event_tx1, mut event_rx1) = channel(64); + let bandwidth_sink = BandwidthSink::new(); + + let handle1 = crate::transport::manager::TransportHandle { + executor: Arc::new(DefaultExecutor {}), + next_substream_id: Default::default(), + next_connection_id: Default::default(), + keypair: keypair1.clone(), + tx: event_tx1, + bandwidth_sink: bandwidth_sink.clone(), + + protocols: HashMap::from_iter([( + ProtocolName::from("/notif/1"), + ProtocolContext { + tx: tx1, + codec: ProtocolCodec::Identity(32), + fallback_names: Vec::new(), + keep_alive: SubstreamKeepAlive::Yes, + }, + )]), + }; + let resolver = Arc::new(TokioResolver::builder_tokio().unwrap().build()); + let (mut transport1, _) = + TcpTransport::new(handle1, Default::default(), resolver.clone()).unwrap(); + + tokio::spawn(async move { + while let Some(event) = transport1.next().await { + match event { + TransportEvent::ConnectionEstablished { .. } => {}, + TransportEvent::ConnectionClosed { .. } => {}, + TransportEvent::DialFailure { .. } => {}, + TransportEvent::ConnectionOpened { .. } => {}, + TransportEvent::OpenFailure { .. } => {}, + TransportEvent::PendingInboundConnection { .. } => {}, + } + } + }); + + let keypair2 = Keypair::generate(); + let (tx2, _rx2) = channel(64); + let (event_tx2, _event_rx2) = channel(64); + + let handle2 = crate::transport::manager::TransportHandle { + executor: Arc::new(DefaultExecutor {}), + next_substream_id: Default::default(), + next_connection_id: Default::default(), + keypair: keypair2.clone(), + tx: event_tx2, + bandwidth_sink: bandwidth_sink.clone(), + + protocols: HashMap::from_iter([( + ProtocolName::from("/notif/1"), + ProtocolContext { + tx: tx2, + codec: ProtocolCodec::Identity(32), + fallback_names: Vec::new(), + keep_alive: SubstreamKeepAlive::Yes, + }, + )]), + }; + + let (mut transport2, _) = TcpTransport::new(handle2, Default::default(), resolver).unwrap(); + + let peer1: PeerId = PeerId::from_public_key(&keypair1.public().into()); + let peer2: PeerId = PeerId::from_public_key(&keypair2.public().into()); + + tracing::info!(target: LOG_TARGET, "peer1 {peer1}, peer2 {peer2}"); + + let address = Multiaddr::empty() + .with(Protocol::Ip6(std::net::Ipv6Addr::new(0, 0, 0, 0, 0, 0, 0, 1))) + .with(Protocol::Tcp(8888)) + .with(Protocol::P2p(Multihash::from_bytes(&peer1.to_bytes()).unwrap())); + + transport2.dial(ConnectionId::new(), address).unwrap(); + + // spawn the other connection in the background as it won't return anything + tokio::spawn(async move { + loop { + let _ = event_rx1.recv().await; + } + }); + + assert!(std::matches!(transport2.next().await, Some(TransportEvent::DialFailure { .. }))); + } + + #[tokio::test] + async fn dial_error_reported_for_outbound_connections() { + let mut manager = TransportManagerBuilder::new().build(); + let handle = manager.transport_handle(Arc::new(DefaultExecutor {})); + let resolver = Arc::new(TokioResolver::builder_tokio().unwrap().build()); + manager.register_transport( + SupportedTransport::Tcp, + Box::new(crate::transport::dummy::DummyTransport::new()), + ); + let (mut transport, _) = TcpTransport::new( + handle, + Config { + listen_addresses: vec!["/ip4/127.0.0.1/tcp/0".parse().unwrap()], + ..Default::default() + }, + resolver, + ) + .unwrap(); + + let keypair = Keypair::generate(); + let peer_id = PeerId::from_public_key(&keypair.public().into()); + let multiaddr = Multiaddr::empty() + .with(Protocol::Ip4(std::net::Ipv4Addr::new(255, 254, 253, 252))) + .with(Protocol::Tcp(8888)) + .with(Protocol::P2p(Multihash::from_bytes(&peer_id.to_bytes()).unwrap())); + manager.dial_address(multiaddr.clone()).await.unwrap(); + + assert!(transport.pending_dials.is_empty()); + + match transport.dial(ConnectionId::from(0usize), multiaddr) { + Ok(()) => {}, + _ => panic!("invalid result for `on_dial_peer()`"), + } + + assert!(!transport.pending_dials.is_empty()); + transport + .pending_connections + .push(Box::pin(async move { Err((ConnectionId::from(0usize), DialError::Timeout)) })); + + assert!(std::matches!(transport.next().await, Some(TransportEvent::DialFailure { .. }))); + assert!(transport.pending_dials.is_empty()); + } } diff --git a/client/litep2p/src/transport/tcp/substream.rs b/client/litep2p/src/transport/tcp/substream.rs index b8ea5bf0..3ab25382 100644 --- a/client/litep2p/src/transport/tcp/substream.rs +++ b/client/litep2p/src/transport/tcp/substream.rs @@ -24,9 +24,9 @@ use tokio::io::{AsyncRead, AsyncWrite}; use tokio_util::compat::Compat; use std::{ - io, - pin::Pin, - task::{Context, Poll}, + io, + pin::Pin, + task::{Context, Poll}, }; /// Substream that holds the inner substream provided by the transport @@ -35,92 +35,88 @@ use std::{ /// `BandwidthSink` is used to meter inbound/outbound bytes. #[derive(Debug)] pub struct Substream { - /// Underlying socket. - io: Compat, + /// Underlying socket. + io: Compat, - /// Bandwidth sink. - bandwidth_sink: BandwidthSink, + /// Bandwidth sink. + bandwidth_sink: BandwidthSink, - /// Permit holding the connection alive while the substream exists. - /// - /// `None` for ping & identify substreams, `Some` for others. - _lifetime_permit: Option, + /// Permit holding the connection alive while the substream exists. + /// + /// `None` for ping & identify substreams, `Some` for others. + _lifetime_permit: Option, } impl Substream { - /// Create new [`Substream`]. - pub fn new( - io: Compat, - bandwidth_sink: BandwidthSink, - lifetime_permit: Option, - ) -> Self { - Self { - io, - bandwidth_sink, - _lifetime_permit: lifetime_permit, - } - } + /// Create new [`Substream`]. + pub fn new( + io: Compat, + bandwidth_sink: BandwidthSink, + lifetime_permit: Option, + ) -> Self { + Self { io, bandwidth_sink, _lifetime_permit: lifetime_permit } + } } impl AsyncRead for Substream { - fn poll_read( - mut self: Pin<&mut Self>, - cx: &mut Context<'_>, - buf: &mut tokio::io::ReadBuf<'_>, - ) -> Poll> { - let len = buf.filled().len(); - match futures::ready!(Pin::new(&mut self.io).poll_read(cx, buf)) { - Err(error) => Poll::Ready(Err(error)), - Ok(res) => { - let inbound_size = buf.filled().len().saturating_sub(len); - self.bandwidth_sink.increase_inbound(inbound_size); - Poll::Ready(Ok(res)) - } - } - } + fn poll_read( + mut self: Pin<&mut Self>, + cx: &mut Context<'_>, + buf: &mut tokio::io::ReadBuf<'_>, + ) -> Poll> { + let len = buf.filled().len(); + match futures::ready!(Pin::new(&mut self.io).poll_read(cx, buf)) { + Err(error) => Poll::Ready(Err(error)), + Ok(res) => { + let inbound_size = buf.filled().len().saturating_sub(len); + self.bandwidth_sink.increase_inbound(inbound_size); + Poll::Ready(Ok(res)) + }, + } + } } impl AsyncWrite for Substream { - fn poll_write( - mut self: Pin<&mut Self>, - cx: &mut Context<'_>, - buf: &[u8], - ) -> Poll> { - match futures::ready!(Pin::new(&mut self.io).poll_write(cx, buf)) { - Err(error) => Poll::Ready(Err(error)), - Ok(nwritten) => { - self.bandwidth_sink.increase_outbound(nwritten); - Poll::Ready(Ok(nwritten)) - } - } - } + fn poll_write( + mut self: Pin<&mut Self>, + cx: &mut Context<'_>, + buf: &[u8], + ) -> Poll> { + match futures::ready!(Pin::new(&mut self.io).poll_write(cx, buf)) { + Err(error) => Poll::Ready(Err(error)), + Ok(nwritten) => { + self.bandwidth_sink.increase_outbound(nwritten); + Poll::Ready(Ok(nwritten)) + }, + } + } - fn poll_flush(mut self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll> { - Pin::new(&mut self.io).poll_flush(cx) - } + fn poll_flush(mut self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll> { + Pin::new(&mut self.io).poll_flush(cx) + } - fn poll_shutdown( - mut self: Pin<&mut Self>, - cx: &mut Context<'_>, - ) -> Poll> { - Pin::new(&mut self.io).poll_shutdown(cx) - } + fn poll_shutdown( + mut self: Pin<&mut Self>, + cx: &mut Context<'_>, + ) -> Poll> { + Pin::new(&mut self.io).poll_shutdown(cx) + } - fn poll_write_vectored( - mut self: Pin<&mut Self>, - cx: &mut Context<'_>, - bufs: &[io::IoSlice<'_>], - ) -> Poll> { - match futures::ready!(Pin::new(&mut self.io).poll_write_vectored(cx, bufs)) { - Err(error) => Poll::Ready(Err(error)), - Ok(nwritten) => { - self.bandwidth_sink.increase_outbound(nwritten); - Poll::Ready(Ok(nwritten)) - } - } - } + fn poll_write_vectored( + mut self: Pin<&mut Self>, + cx: &mut Context<'_>, + bufs: &[io::IoSlice<'_>], + ) -> Poll> { + match futures::ready!(Pin::new(&mut self.io).poll_write_vectored(cx, bufs)) { + Err(error) => Poll::Ready(Err(error)), + Ok(nwritten) => { + self.bandwidth_sink.increase_outbound(nwritten); + Poll::Ready(Ok(nwritten)) + }, + } + } - fn is_write_vectored(&self) -> bool { - self.io.is_write_vectored() - } + fn is_write_vectored(&self) -> bool { + self.io.is_write_vectored() + } } diff --git a/client/litep2p/src/transport/webrtc/config.rs b/client/litep2p/src/transport/webrtc/config.rs index b9314010..84e2022e 100644 --- a/client/litep2p/src/transport/webrtc/config.rs +++ b/client/litep2p/src/transport/webrtc/config.rs @@ -25,22 +25,22 @@ use multiaddr::Multiaddr; /// WebRTC transport configuration. #[derive(Debug)] pub struct Config { - /// WebRTC listening address. - pub listen_addresses: Vec, + /// WebRTC listening address. + pub listen_addresses: Vec, - /// Connection datagram buffer size. - /// - /// How many datagrams can the buffer between `WebRtcTransport` and a connection handler hold. - pub datagram_buffer_size: usize, + /// Connection datagram buffer size. + /// + /// How many datagrams can the buffer between `WebRtcTransport` and a connection handler hold. + pub datagram_buffer_size: usize, } impl Default for Config { - fn default() -> Self { - Self { - listen_addresses: vec!["/ip4/127.0.0.1/udp/8888/webrtc-direct" - .parse() - .expect("valid multiaddress")], - datagram_buffer_size: 2048, - } - } + fn default() -> Self { + Self { + listen_addresses: vec!["/ip4/127.0.0.1/udp/8888/webrtc-direct" + .parse() + .expect("valid multiaddress")], + datagram_buffer_size: 2048, + } + } } diff --git a/client/litep2p/src/transport/webrtc/connection.rs b/client/litep2p/src/transport/webrtc/connection.rs index f0152016..ffd72aca 100644 --- a/client/litep2p/src/transport/webrtc/connection.rs +++ b/client/litep2p/src/transport/webrtc/connection.rs @@ -19,40 +19,40 @@ // DEALINGS IN THE SOFTWARE. use crate::{ - error::{Error, ParseError, SubstreamError}, - multistream_select::{ - webrtc_listener_negotiate, HandshakeResult, ListenerSelectResult, WebRtcDialerState, - }, - protocol::{Direction, Permit, ProtocolCommand, ProtocolSet, SubstreamKeepAlive}, - substream::Substream, - transport::{ - webrtc::{ - schema::webrtc::message::Flag, - substream::{Event as SubstreamEvent, Substream as WebRtcSubstream, SubstreamHandle}, - util::WebRtcMessage, - }, - Endpoint, - }, - types::{protocol::ProtocolName, SubstreamId}, - PeerId, + error::{Error, ParseError, SubstreamError}, + multistream_select::{ + webrtc_listener_negotiate, HandshakeResult, ListenerSelectResult, WebRtcDialerState, + }, + protocol::{Direction, Permit, ProtocolCommand, ProtocolSet, SubstreamKeepAlive}, + substream::Substream, + transport::{ + webrtc::{ + schema::webrtc::message::Flag, + substream::{Event as SubstreamEvent, Substream as WebRtcSubstream, SubstreamHandle}, + util::WebRtcMessage, + }, + Endpoint, + }, + types::{protocol::ProtocolName, SubstreamId}, + PeerId, }; use futures::{Stream, StreamExt}; use indexmap::IndexMap; use str0m::{ - channel::{ChannelConfig, ChannelId}, - net::{Protocol as Str0mProtocol, Receive}, - Event, IceConnectionState, Input, Output, Rtc, + channel::{ChannelConfig, ChannelId}, + net::{Protocol as Str0mProtocol, Receive}, + Event, IceConnectionState, Input, Output, Rtc, }; use tokio::{net::UdpSocket, sync::mpsc::Receiver}; use std::{ - collections::HashMap, - net::SocketAddr, - pin::Pin, - sync::Arc, - task::{Context, Poll}, - time::Instant, + collections::HashMap, + net::SocketAddr, + pin::Pin, + sync::Arc, + task::{Context, Poll}, + time::Instant, }; /// Logging target for the file. @@ -61,807 +61,763 @@ const LOG_TARGET: &str = "litep2p::webrtc::connection"; /// Opening channel context. #[derive(Debug)] struct ChannelContext { - /// Protocol name. - protocol: ProtocolName, + /// Protocol name. + protocol: ProtocolName, - /// Fallback names. - fallback_names: Vec, + /// Fallback names. + fallback_names: Vec, - /// Substream ID. - substream_id: SubstreamId, + /// Substream ID. + substream_id: SubstreamId, - /// Permit which keeps the connection open while we are opening a substream. Must be returned - /// to [`TransportService`](crate::protocol::TransportService), where it can be safely dropped - /// after upgrading the connection. - opening_permit: Permit, + /// Permit which keeps the connection open while we are opening a substream. Must be returned + /// to [`TransportService`](crate::protocol::TransportService), where it can be safely dropped + /// after upgrading the connection. + opening_permit: Permit, - /// Whether this substream should keep the connection alive while it exists, i.e., whether it - /// should store the permit entioned above for the lifetime of the substream. - keep_alive: SubstreamKeepAlive, + /// Whether this substream should keep the connection alive while it exists, i.e., whether it + /// should store the permit entioned above for the lifetime of the substream. + keep_alive: SubstreamKeepAlive, } /// Set of [`SubstreamHandle`]s. struct SubstreamHandleSet { - /// Current index. - index: usize, + /// Current index. + index: usize, - /// Substream handles. - handles: IndexMap, + /// Substream handles. + handles: IndexMap, } impl SubstreamHandleSet { - /// Create new [`SubstreamHandleSet`]. - pub fn new() -> Self { - Self { - index: 0usize, - handles: IndexMap::new(), - } - } - - /// Get mutable access to `SubstreamHandle`. - pub fn get_mut(&mut self, key: &ChannelId) -> Option<&mut SubstreamHandle> { - self.handles.get_mut(key) - } - - /// Insert new handle to [`SubstreamHandleSet`]. - pub fn insert(&mut self, key: ChannelId, handle: SubstreamHandle) { - assert!(self.handles.insert(key, handle).is_none()); - } - - /// Remove handle from [`SubstreamHandleSet`]. - pub fn remove(&mut self, key: &ChannelId) -> Option { - self.handles.shift_remove(key) - } + /// Create new [`SubstreamHandleSet`]. + pub fn new() -> Self { + Self { index: 0usize, handles: IndexMap::new() } + } + + /// Get mutable access to `SubstreamHandle`. + pub fn get_mut(&mut self, key: &ChannelId) -> Option<&mut SubstreamHandle> { + self.handles.get_mut(key) + } + + /// Insert new handle to [`SubstreamHandleSet`]. + pub fn insert(&mut self, key: ChannelId, handle: SubstreamHandle) { + assert!(self.handles.insert(key, handle).is_none()); + } + + /// Remove handle from [`SubstreamHandleSet`]. + pub fn remove(&mut self, key: &ChannelId) -> Option { + self.handles.shift_remove(key) + } } impl Stream for SubstreamHandleSet { - type Item = (ChannelId, Option); - - fn poll_next(mut self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll> { - let len = match self.handles.len() { - 0 => return Poll::Pending, - len => len, - }; - let start_index = self.index; - - loop { - let index = self.index % len; - self.index += 1; - - let (key, stream) = self.handles.get_index_mut(index).expect("handle to exist"); - match stream.poll_next_unpin(cx) { - Poll::Pending => {} - Poll::Ready(event) => return Poll::Ready(Some((*key, event))), - } - - if self.index == start_index + len { - break Poll::Pending; - } - } - } + type Item = (ChannelId, Option); + + fn poll_next(mut self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll> { + let len = match self.handles.len() { + 0 => return Poll::Pending, + len => len, + }; + let start_index = self.index; + + loop { + let index = self.index % len; + self.index += 1; + + let (key, stream) = self.handles.get_index_mut(index).expect("handle to exist"); + match stream.poll_next_unpin(cx) { + Poll::Pending => {}, + Poll::Ready(event) => return Poll::Ready(Some((*key, event))), + } + + if self.index == start_index + len { + break Poll::Pending; + } + } + } } /// Channel state. #[derive(Debug)] enum ChannelState { - /// Channel is closing. - Closing, + /// Channel is closing. + Closing, - /// Inbound channel is opening. - InboundOpening, + /// Inbound channel is opening. + InboundOpening, - /// Outbound channel is opening. - OutboundOpening { - /// Channel context. - context: ChannelContext, + /// Outbound channel is opening. + OutboundOpening { + /// Channel context. + context: ChannelContext, - /// `multistream-select` dialer state. - dialer_state: WebRtcDialerState, - }, + /// `multistream-select` dialer state. + dialer_state: WebRtcDialerState, + }, - /// Channel is open. - Open { - /// Substream ID. - substream_id: SubstreamId, + /// Channel is open. + Open { + /// Substream ID. + substream_id: SubstreamId, - /// Channel ID. - channel_id: ChannelId, + /// Channel ID. + channel_id: ChannelId, - /// Connection permit if this substream needs to keep connection open. - lifetime_permit: Option, - }, + /// Connection permit if this substream needs to keep connection open. + lifetime_permit: Option, + }, } /// WebRTC connection. pub struct WebRtcConnection { - /// `str0m` WebRTC object. - rtc: Rtc, + /// `str0m` WebRTC object. + rtc: Rtc, - /// Protocol set. - protocol_set: ProtocolSet, + /// Protocol set. + protocol_set: ProtocolSet, - /// Remote peer ID. - peer: PeerId, + /// Remote peer ID. + peer: PeerId, - /// Endpoint. - endpoint: Endpoint, + /// Endpoint. + endpoint: Endpoint, - /// Peer address - peer_address: SocketAddr, + /// Peer address + peer_address: SocketAddr, - /// Local address. - local_address: SocketAddr, + /// Local address. + local_address: SocketAddr, - /// Transport socket. - socket: Arc, + /// Transport socket. + socket: Arc, - /// RX channel for receiving datagrams from the transport. - dgram_rx: Receiver>, + /// RX channel for receiving datagrams from the transport. + dgram_rx: Receiver>, - /// Pending outbound channels. - pending_outbound: HashMap, + /// Pending outbound channels. + pending_outbound: HashMap, - /// Open channels. - channels: HashMap, + /// Open channels. + channels: HashMap, - /// Substream handles. - handles: SubstreamHandleSet, + /// Substream handles. + handles: SubstreamHandleSet, } impl WebRtcConnection { - /// Create new [`WebRtcConnection`]. - pub fn new( - rtc: Rtc, - peer: PeerId, - peer_address: SocketAddr, - local_address: SocketAddr, - socket: Arc, - protocol_set: ProtocolSet, - endpoint: Endpoint, - dgram_rx: Receiver>, - ) -> Self { - Self { - rtc, - protocol_set, - peer, - peer_address, - local_address, - socket, - endpoint, - dgram_rx, - pending_outbound: HashMap::new(), - channels: HashMap::new(), - handles: SubstreamHandleSet::new(), - } - } - - /// Handle opened channel. - /// - /// If the channel is inbound, nothing is done because we have to wait for data - /// `multistream-select` handshake to be received from remote peer before anything - /// else can be done. - /// - /// If the channel is outbound, send `multistream-select` handshake to remote peer. - async fn on_channel_opened( - &mut self, - channel_id: ChannelId, - channel_name: String, - ) -> crate::Result<()> { - tracing::trace!( - target: LOG_TARGET, - peer = ?self.peer, - ?channel_id, - ?channel_name, - "channel opened", - ); - - let Some(mut context) = self.pending_outbound.remove(&channel_id) else { - tracing::trace!( - target: LOG_TARGET, - peer = ?self.peer, - ?channel_id, - "inbound channel opened, wait for `multistream-select` message", - ); - - self.channels.insert(channel_id, ChannelState::InboundOpening); - return Ok(()); - }; - - let fallback_names = std::mem::take(&mut context.fallback_names); - let (dialer_state, message) = - WebRtcDialerState::propose(context.protocol.clone(), fallback_names)?; - let message = WebRtcMessage::encode(message, None); - - self.rtc - .channel(channel_id) - .ok_or(Error::ChannelDoesntExist)? - .write(true, message.as_ref()) - .map_err(Error::WebRtc)?; - - self.channels.insert( - channel_id, - ChannelState::OutboundOpening { - context, - dialer_state, - }, - ); - - Ok(()) - } - - /// Handle closed channel. - async fn on_channel_closed(&mut self, channel_id: ChannelId) -> crate::Result<()> { - tracing::trace!( - target: LOG_TARGET, - peer = ?self.peer, - ?channel_id, - "channel closed", - ); - - self.pending_outbound.remove(&channel_id); - self.channels.remove(&channel_id); - self.handles.remove(&channel_id); - - Ok(()) - } - - /// Handle data received to an opening inbound channel. - /// - /// The first message received over an inbound channel is the `multistream-select` handshake. - /// This handshake contains the protocol (and potentially fallbacks for that protocol) that - /// remote peer wants to use for this channel. Parse the handshake and check if any of the - /// proposed protocols are supported by the local node. If not, send rejection to remote peer - /// and close the channel. If the local node supports one of the protocols, send confirmation - /// for the protocol to remote peer and report an opened substream to the selected protocol. - async fn on_inbound_opening_channel_data( - &mut self, - channel_id: ChannelId, - data: Vec, - ) -> crate::Result<(SubstreamId, SubstreamHandle, Option)> { - tracing::trace!( - target: LOG_TARGET, - peer = ?self.peer, - ?channel_id, - "handle opening inbound substream", - ); - - let payload = WebRtcMessage::decode(&data)?.payload.ok_or(Error::InvalidData)?; - let protocols = self.protocol_set.protocols_with_keep_alives(); - let protocol_names = protocols.keys().cloned().collect(); - let (response, negotiated) = - match webrtc_listener_negotiate(protocol_names, payload.into())? { - ListenerSelectResult::Accepted { protocol, message } => (message, Some(protocol)), - ListenerSelectResult::Rejected { message } => (message, None), - }; - - self.rtc - .channel(channel_id) - .ok_or(Error::ChannelDoesntExist)? - .write( - true, - WebRtcMessage::encode(response.to_vec(), None).as_ref(), - ) - .map_err(Error::WebRtc)?; - - let protocol = negotiated.ok_or(Error::SubstreamDoesntExist)?; - let substream_id = self.protocol_set.next_substream_id(); - let codec = self.protocol_set.protocol_codec(&protocol); - let opening_permit = self.protocol_set.try_get_permit().ok_or(Error::ConnectionClosed)?; - let (substream, handle) = WebRtcSubstream::new(); - let substream = Substream::new_webrtc(self.peer, substream_id, substream, codec); - let keep_alive = - protocols.get(&protocol).expect("negotiated protocol to be one of the keys"); - let lifetime_permit = keep_alive.then(|| opening_permit.clone()); - - tracing::trace!( - target: LOG_TARGET, - peer = ?self.peer, - ?channel_id, - ?substream_id, - ?protocol, - "inbound substream opened", - ); - - self.protocol_set - .report_substream_open( - self.peer, - protocol.clone(), - Direction::Inbound, - substream, - opening_permit, - ) - .await - .map(|_| (substream_id, handle, lifetime_permit)) - .map_err(Into::into) - } - - /// Handle data received to an opening outbound channel. - /// - /// When an outbound channel is opened, the first message the local node sends it the - /// `multistream-select` handshake which contains the protocol (and any fallbacks for that - /// protocol) that the local node wants to use to negotiate for the channel. When a message is - /// received from a remote peer for a channel in state [`ChannelState::OutboundOpening`], parse - /// the `multistream-select` handshake response. The response either contains a rejection which - /// causes the substream to be closed, a partial response, or a full response. If a partial - /// response is heard, e.g., only the header line is received, the handshake cannot be concluded - /// and the channel is placed back in the [`ChannelState::OutboundOpening`] state to wait for - /// the rest of the handshake. If a full response is received (or rest of the partial response), - /// the protocol confirmation is verified and the substream is reported to the protocol. - /// - /// If the substream fails to open for whatever reason, since this is an outbound substream, - /// the protocol is notified of the failure. - async fn on_outbound_opening_channel_data( - &mut self, - channel_id: ChannelId, - data: Vec, - mut dialer_state: WebRtcDialerState, - context: ChannelContext, - ) -> Result, SubstreamError> { - tracing::trace!( - target: LOG_TARGET, - peer = ?self.peer, - ?channel_id, - data_len = ?data.len(), - "handle opening outbound substream", - ); - - let rtc_message = WebRtcMessage::decode(&data) - .map_err(|err| SubstreamError::NegotiationError(err.into()))?; - let message = rtc_message.payload.ok_or(SubstreamError::NegotiationError( - ParseError::InvalidData.into(), - ))?; - - let HandshakeResult::Succeeded(protocol) = dialer_state.register_response(message)? else { - tracing::trace!( - target: LOG_TARGET, - peer = ?self.peer, - ?channel_id, - "multistream-select handshake not ready", - ); - - self.channels.insert( - channel_id, - ChannelState::OutboundOpening { - context, - dialer_state, - }, - ); - - return Ok(None); - }; - - let ChannelContext { - substream_id, - opening_permit, - .. - } = context; - let codec = self.protocol_set.protocol_codec(&protocol); - let (substream, handle) = WebRtcSubstream::new(); - let substream = Substream::new_webrtc(self.peer, substream_id, substream, codec); - - tracing::trace!( - target: LOG_TARGET, - peer = ?self.peer, - ?channel_id, - ?substream_id, - ?protocol, - "outbound substream opened", - ); - - self.protocol_set - .report_substream_open( - self.peer, - protocol.clone(), - Direction::Outbound(substream_id), - substream, - opening_permit, - ) - .await - .map(|_| Some((substream_id, handle))) - } - - /// Handle data received from an open channel. - async fn on_open_channel_data( - &mut self, - channel_id: ChannelId, - data: Vec, - ) -> crate::Result<()> { - let message = WebRtcMessage::decode(&data)?; - - tracing::trace!( - target: LOG_TARGET, - peer = ?self.peer, - ?channel_id, - flag = ?message.flag, - data_len = message.payload.as_ref().map_or(0usize, |payload| payload.len()), - "handle inbound message", - ); - - self.handles - .get_mut(&channel_id) - .ok_or_else(|| { - tracing::warn!( - target: LOG_TARGET, - peer = ?self.peer, - ?channel_id, - "data received from an unknown channel", - ); - debug_assert!(false); - Error::InvalidState - })? - .on_message(message) - .await - } - - /// Handle data received from a channel. - async fn on_inbound_data(&mut self, channel_id: ChannelId, data: Vec) -> crate::Result<()> { - let Some(state) = self.channels.remove(&channel_id) else { - tracing::warn!( - target: LOG_TARGET, - peer = ?self.peer, - ?channel_id, - "data received over a channel that doesn't exist", - ); - debug_assert!(false); - return Err(Error::InvalidState); - }; - - match state { - ChannelState::InboundOpening => { - match self.on_inbound_opening_channel_data(channel_id, data).await { - Ok((substream_id, handle, lifetime_permit)) => { - self.handles.insert(channel_id, handle); - self.channels.insert( - channel_id, - ChannelState::Open { - substream_id, - channel_id, - lifetime_permit, - }, - ); - } - Err(error) => { - tracing::debug!( - target: LOG_TARGET, - peer = ?self.peer, - ?channel_id, - ?error, - "failed to handle opening inbound substream", - ); - - self.channels.insert(channel_id, ChannelState::Closing); - self.rtc.direct_api().close_data_channel(channel_id); - } - } - } - ChannelState::OutboundOpening { - context, - dialer_state, - } => { - let protocol = context.protocol.clone(); - let substream_id = context.substream_id; - let lifetime_permit = context.keep_alive.then(|| context.opening_permit.clone()); - - match self - .on_outbound_opening_channel_data(channel_id, data, dialer_state, context) - .await - { - Ok(Some((substream_id, handle))) => { - self.handles.insert(channel_id, handle); - self.channels.insert( - channel_id, - ChannelState::Open { - substream_id, - channel_id, - lifetime_permit, - }, - ); - } - Ok(None) => {} - Err(error) => { - tracing::debug!( - target: LOG_TARGET, - peer = ?self.peer, - ?channel_id, - ?error, - "failed to handle opening outbound substream", - ); - - let _ = self - .protocol_set - .report_substream_open_failure(protocol, substream_id, error) - .await; - - self.rtc.direct_api().close_data_channel(channel_id); - self.channels.insert(channel_id, ChannelState::Closing); - } - } - } - ChannelState::Open { - substream_id, - channel_id, - lifetime_permit, - } => match self.on_open_channel_data(channel_id, data).await { - Ok(()) => { - self.channels.insert( - channel_id, - ChannelState::Open { - substream_id, - channel_id, - lifetime_permit, - }, - ); - } - Err(error) => { - tracing::debug!( - target: LOG_TARGET, - peer = ?self.peer, - ?channel_id, - ?error, - "failed to handle data for an open channel", - ); - - self.rtc.direct_api().close_data_channel(channel_id); - self.channels.insert(channel_id, ChannelState::Closing); - } - }, - ChannelState::Closing => { - tracing::debug!( - target: LOG_TARGET, - peer = ?self.peer, - ?channel_id, - "channel closing, discarding received data", - ); - self.channels.insert(channel_id, ChannelState::Closing); - } - } - - Ok(()) - } - - /// Handle outbound data with optional flag. - fn on_outbound_data( - &mut self, - channel_id: ChannelId, - data: Vec, - flag: Option, - ) -> crate::Result<()> { - tracing::trace!( - target: LOG_TARGET, - peer = ?self.peer, - ?channel_id, - data_len = ?data.len(), - ?flag, - "send data", - ); - - self.rtc - .channel(channel_id) - .ok_or(Error::ChannelDoesntExist)? - .write(true, WebRtcMessage::encode(data, flag).as_ref()) - .map_err(Error::WebRtc) - .map(|_| ()) - } - - /// Open outbound substream. - fn on_open_substream( - &mut self, - protocol: ProtocolName, - fallback_names: Vec, - substream_id: SubstreamId, - opening_permit: Permit, - keep_alive: SubstreamKeepAlive, - ) { - let channel_id = self.rtc.direct_api().create_data_channel(ChannelConfig { - label: "".to_string(), - ordered: false, - reliability: Default::default(), - negotiated: None, - protocol: protocol.to_string(), - }); - - tracing::trace!( - target: LOG_TARGET, - peer = ?self.peer, - ?channel_id, - ?substream_id, - ?protocol, - ?fallback_names, - "open data channel", - ); - - self.pending_outbound.insert( - channel_id, - ChannelContext { - protocol, - fallback_names, - substream_id, - opening_permit, - keep_alive, - }, - ); - } - - /// Connection to peer has been closed. - async fn on_connection_closed(&mut self) { - tracing::trace!( - target: LOG_TARGET, - peer = ?self.peer, - "connection closed", - ); - - let _ = self - .protocol_set - .report_connection_closed(self.peer, self.endpoint.connection_id()) - .await; - } - - /// Start the connection event loop without notifying protocols. - pub async fn run_event_loop(mut self) { - loop { - // poll output until we get a timeout - let timeout = match self.rtc.poll_output().unwrap() { - Output::Timeout(v) => v, - Output::Transmit(v) => { - tracing::trace!( - target: LOG_TARGET, - peer = ?self.peer, - datagram_len = ?v.contents.len(), - "transmit data", - ); - - self.socket.try_send_to(&v.contents, v.destination).unwrap(); - continue; - } - Output::Event(v) => match v { - Event::IceConnectionStateChange(IceConnectionState::Disconnected) => { - tracing::trace!( - target: LOG_TARGET, - peer = ?self.peer, - "ice connection state changed to closed", - ); - return self.on_connection_closed().await; - } - Event::ChannelOpen(channel_id, name) => { - if let Err(error) = self.on_channel_opened(channel_id, name).await { - tracing::debug!( - target: LOG_TARGET, - peer = ?self.peer, - ?channel_id, - ?error, - "failed to handle opened channel", - ); - } - - continue; - } - Event::ChannelClose(channel_id) => { - if let Err(error) = self.on_channel_closed(channel_id).await { - tracing::debug!( - target: LOG_TARGET, - peer = ?self.peer, - ?channel_id, - ?error, - "failed to handle closed channel", - ); - } - - continue; - } - Event::ChannelData(info) => { - if let Err(error) = self.on_inbound_data(info.id, info.data).await { - tracing::debug!( - target: LOG_TARGET, - peer = ?self.peer, - channel_id = ?info.id, - ?error, - "failed to handle channel data", - ); - } - - continue; - } - event => { - tracing::debug!( - target: LOG_TARGET, - peer = ?self.peer, - ?event, - "unhandled event", - ); - continue; - } - }, - }; - - let duration = timeout - Instant::now(); - if duration.is_zero() { - self.rtc.handle_input(Input::Timeout(Instant::now())).unwrap(); - continue; - } - - tokio::select! { - biased; - datagram = self.dgram_rx.recv() => match datagram { - Some(datagram) => { - let input = Input::Receive( - Instant::now(), - Receive { - proto: Str0mProtocol::Udp, - source: self.peer_address, - destination: self.local_address, - contents: datagram.as_slice().try_into().unwrap(), - }, - ); - - self.rtc.handle_input(input).unwrap(); - } - None => { - tracing::trace!( - target: LOG_TARGET, - peer = ?self.peer, - "read `None` from `dgram_rx`", - ); - return self.on_connection_closed().await; - } - }, - event = self.handles.next() => match event { - None => unreachable!(), - Some((channel_id, None)) => { - tracing::trace!( - target: LOG_TARGET, - peer = ?self.peer, - ?channel_id, - "channel closed", - ); - - self.rtc.direct_api().close_data_channel(channel_id); - self.channels.insert(channel_id, ChannelState::Closing); - self.handles.remove(&channel_id); - } - Some((channel_id, Some(SubstreamEvent::Message { payload, flag }))) => { - if let Err(error) = self.on_outbound_data(channel_id, payload, flag) { - tracing::debug!( - target: LOG_TARGET, - ?channel_id, - ?flag, - ?error, - "failed to send data to remote peer", - ); - } - } - Some((_, Some(SubstreamEvent::RecvClosed))) => {} - }, - command = self.protocol_set.next() => match command { - None | Some(ProtocolCommand::ForceClose) => { - tracing::trace!( - target: LOG_TARGET, - peer = ?self.peer, - ?command, - "`ProtocolSet` instructed to close connection", - ); - return self.on_connection_closed().await; - } - Some(ProtocolCommand::OpenSubstream { - protocol, - fallback_names, - substream_id, - permit, - keep_alive, - connection_id: _, - }) => { - self.on_open_substream( - protocol, - fallback_names, - substream_id, - permit, - keep_alive, - ); - } - }, - _ = tokio::time::sleep(duration) => { - self.rtc.handle_input(Input::Timeout(Instant::now())).unwrap(); - } - } - } - } + /// Create new [`WebRtcConnection`]. + pub fn new( + rtc: Rtc, + peer: PeerId, + peer_address: SocketAddr, + local_address: SocketAddr, + socket: Arc, + protocol_set: ProtocolSet, + endpoint: Endpoint, + dgram_rx: Receiver>, + ) -> Self { + Self { + rtc, + protocol_set, + peer, + peer_address, + local_address, + socket, + endpoint, + dgram_rx, + pending_outbound: HashMap::new(), + channels: HashMap::new(), + handles: SubstreamHandleSet::new(), + } + } + + /// Handle opened channel. + /// + /// If the channel is inbound, nothing is done because we have to wait for data + /// `multistream-select` handshake to be received from remote peer before anything + /// else can be done. + /// + /// If the channel is outbound, send `multistream-select` handshake to remote peer. + async fn on_channel_opened( + &mut self, + channel_id: ChannelId, + channel_name: String, + ) -> crate::Result<()> { + tracing::trace!( + target: LOG_TARGET, + peer = ?self.peer, + ?channel_id, + ?channel_name, + "channel opened", + ); + + let Some(mut context) = self.pending_outbound.remove(&channel_id) else { + tracing::trace!( + target: LOG_TARGET, + peer = ?self.peer, + ?channel_id, + "inbound channel opened, wait for `multistream-select` message", + ); + + self.channels.insert(channel_id, ChannelState::InboundOpening); + return Ok(()); + }; + + let fallback_names = std::mem::take(&mut context.fallback_names); + let (dialer_state, message) = + WebRtcDialerState::propose(context.protocol.clone(), fallback_names)?; + let message = WebRtcMessage::encode(message, None); + + self.rtc + .channel(channel_id) + .ok_or(Error::ChannelDoesntExist)? + .write(true, message.as_ref()) + .map_err(Error::WebRtc)?; + + self.channels + .insert(channel_id, ChannelState::OutboundOpening { context, dialer_state }); + + Ok(()) + } + + /// Handle closed channel. + async fn on_channel_closed(&mut self, channel_id: ChannelId) -> crate::Result<()> { + tracing::trace!( + target: LOG_TARGET, + peer = ?self.peer, + ?channel_id, + "channel closed", + ); + + self.pending_outbound.remove(&channel_id); + self.channels.remove(&channel_id); + self.handles.remove(&channel_id); + + Ok(()) + } + + /// Handle data received to an opening inbound channel. + /// + /// The first message received over an inbound channel is the `multistream-select` handshake. + /// This handshake contains the protocol (and potentially fallbacks for that protocol) that + /// remote peer wants to use for this channel. Parse the handshake and check if any of the + /// proposed protocols are supported by the local node. If not, send rejection to remote peer + /// and close the channel. If the local node supports one of the protocols, send confirmation + /// for the protocol to remote peer and report an opened substream to the selected protocol. + async fn on_inbound_opening_channel_data( + &mut self, + channel_id: ChannelId, + data: Vec, + ) -> crate::Result<(SubstreamId, SubstreamHandle, Option)> { + tracing::trace!( + target: LOG_TARGET, + peer = ?self.peer, + ?channel_id, + "handle opening inbound substream", + ); + + let payload = WebRtcMessage::decode(&data)?.payload.ok_or(Error::InvalidData)?; + let protocols = self.protocol_set.protocols_with_keep_alives(); + let protocol_names = protocols.keys().cloned().collect(); + let (response, negotiated) = + match webrtc_listener_negotiate(protocol_names, payload.into())? { + ListenerSelectResult::Accepted { protocol, message } => (message, Some(protocol)), + ListenerSelectResult::Rejected { message } => (message, None), + }; + + self.rtc + .channel(channel_id) + .ok_or(Error::ChannelDoesntExist)? + .write(true, WebRtcMessage::encode(response.to_vec(), None).as_ref()) + .map_err(Error::WebRtc)?; + + let protocol = negotiated.ok_or(Error::SubstreamDoesntExist)?; + let substream_id = self.protocol_set.next_substream_id(); + let codec = self.protocol_set.protocol_codec(&protocol); + let opening_permit = self.protocol_set.try_get_permit().ok_or(Error::ConnectionClosed)?; + let (substream, handle) = WebRtcSubstream::new(); + let substream = Substream::new_webrtc(self.peer, substream_id, substream, codec); + let keep_alive = + protocols.get(&protocol).expect("negotiated protocol to be one of the keys"); + let lifetime_permit = keep_alive.then(|| opening_permit.clone()); + + tracing::trace!( + target: LOG_TARGET, + peer = ?self.peer, + ?channel_id, + ?substream_id, + ?protocol, + "inbound substream opened", + ); + + self.protocol_set + .report_substream_open( + self.peer, + protocol.clone(), + Direction::Inbound, + substream, + opening_permit, + ) + .await + .map(|_| (substream_id, handle, lifetime_permit)) + .map_err(Into::into) + } + + /// Handle data received to an opening outbound channel. + /// + /// When an outbound channel is opened, the first message the local node sends it the + /// `multistream-select` handshake which contains the protocol (and any fallbacks for that + /// protocol) that the local node wants to use to negotiate for the channel. When a message is + /// received from a remote peer for a channel in state [`ChannelState::OutboundOpening`], parse + /// the `multistream-select` handshake response. The response either contains a rejection which + /// causes the substream to be closed, a partial response, or a full response. If a partial + /// response is heard, e.g., only the header line is received, the handshake cannot be concluded + /// and the channel is placed back in the [`ChannelState::OutboundOpening`] state to wait for + /// the rest of the handshake. If a full response is received (or rest of the partial response), + /// the protocol confirmation is verified and the substream is reported to the protocol. + /// + /// If the substream fails to open for whatever reason, since this is an outbound substream, + /// the protocol is notified of the failure. + async fn on_outbound_opening_channel_data( + &mut self, + channel_id: ChannelId, + data: Vec, + mut dialer_state: WebRtcDialerState, + context: ChannelContext, + ) -> Result, SubstreamError> { + tracing::trace!( + target: LOG_TARGET, + peer = ?self.peer, + ?channel_id, + data_len = ?data.len(), + "handle opening outbound substream", + ); + + let rtc_message = WebRtcMessage::decode(&data) + .map_err(|err| SubstreamError::NegotiationError(err.into()))?; + let message = rtc_message + .payload + .ok_or(SubstreamError::NegotiationError(ParseError::InvalidData.into()))?; + + let HandshakeResult::Succeeded(protocol) = dialer_state.register_response(message)? else { + tracing::trace!( + target: LOG_TARGET, + peer = ?self.peer, + ?channel_id, + "multistream-select handshake not ready", + ); + + self.channels + .insert(channel_id, ChannelState::OutboundOpening { context, dialer_state }); + + return Ok(None); + }; + + let ChannelContext { substream_id, opening_permit, .. } = context; + let codec = self.protocol_set.protocol_codec(&protocol); + let (substream, handle) = WebRtcSubstream::new(); + let substream = Substream::new_webrtc(self.peer, substream_id, substream, codec); + + tracing::trace!( + target: LOG_TARGET, + peer = ?self.peer, + ?channel_id, + ?substream_id, + ?protocol, + "outbound substream opened", + ); + + self.protocol_set + .report_substream_open( + self.peer, + protocol.clone(), + Direction::Outbound(substream_id), + substream, + opening_permit, + ) + .await + .map(|_| Some((substream_id, handle))) + } + + /// Handle data received from an open channel. + async fn on_open_channel_data( + &mut self, + channel_id: ChannelId, + data: Vec, + ) -> crate::Result<()> { + let message = WebRtcMessage::decode(&data)?; + + tracing::trace!( + target: LOG_TARGET, + peer = ?self.peer, + ?channel_id, + flag = ?message.flag, + data_len = message.payload.as_ref().map_or(0usize, |payload| payload.len()), + "handle inbound message", + ); + + self.handles + .get_mut(&channel_id) + .ok_or_else(|| { + tracing::warn!( + target: LOG_TARGET, + peer = ?self.peer, + ?channel_id, + "data received from an unknown channel", + ); + debug_assert!(false); + Error::InvalidState + })? + .on_message(message) + .await + } + + /// Handle data received from a channel. + async fn on_inbound_data(&mut self, channel_id: ChannelId, data: Vec) -> crate::Result<()> { + let Some(state) = self.channels.remove(&channel_id) else { + tracing::warn!( + target: LOG_TARGET, + peer = ?self.peer, + ?channel_id, + "data received over a channel that doesn't exist", + ); + debug_assert!(false); + return Err(Error::InvalidState); + }; + + match state { + ChannelState::InboundOpening => { + match self.on_inbound_opening_channel_data(channel_id, data).await { + Ok((substream_id, handle, lifetime_permit)) => { + self.handles.insert(channel_id, handle); + self.channels.insert( + channel_id, + ChannelState::Open { substream_id, channel_id, lifetime_permit }, + ); + }, + Err(error) => { + tracing::debug!( + target: LOG_TARGET, + peer = ?self.peer, + ?channel_id, + ?error, + "failed to handle opening inbound substream", + ); + + self.channels.insert(channel_id, ChannelState::Closing); + self.rtc.direct_api().close_data_channel(channel_id); + }, + } + }, + ChannelState::OutboundOpening { context, dialer_state } => { + let protocol = context.protocol.clone(); + let substream_id = context.substream_id; + let lifetime_permit = context.keep_alive.then(|| context.opening_permit.clone()); + + match self + .on_outbound_opening_channel_data(channel_id, data, dialer_state, context) + .await + { + Ok(Some((substream_id, handle))) => { + self.handles.insert(channel_id, handle); + self.channels.insert( + channel_id, + ChannelState::Open { substream_id, channel_id, lifetime_permit }, + ); + }, + Ok(None) => {}, + Err(error) => { + tracing::debug!( + target: LOG_TARGET, + peer = ?self.peer, + ?channel_id, + ?error, + "failed to handle opening outbound substream", + ); + + let _ = self + .protocol_set + .report_substream_open_failure(protocol, substream_id, error) + .await; + + self.rtc.direct_api().close_data_channel(channel_id); + self.channels.insert(channel_id, ChannelState::Closing); + }, + } + }, + ChannelState::Open { substream_id, channel_id, lifetime_permit } => + match self.on_open_channel_data(channel_id, data).await { + Ok(()) => { + self.channels.insert( + channel_id, + ChannelState::Open { substream_id, channel_id, lifetime_permit }, + ); + }, + Err(error) => { + tracing::debug!( + target: LOG_TARGET, + peer = ?self.peer, + ?channel_id, + ?error, + "failed to handle data for an open channel", + ); + + self.rtc.direct_api().close_data_channel(channel_id); + self.channels.insert(channel_id, ChannelState::Closing); + }, + }, + ChannelState::Closing => { + tracing::debug!( + target: LOG_TARGET, + peer = ?self.peer, + ?channel_id, + "channel closing, discarding received data", + ); + self.channels.insert(channel_id, ChannelState::Closing); + }, + } + + Ok(()) + } + + /// Handle outbound data with optional flag. + fn on_outbound_data( + &mut self, + channel_id: ChannelId, + data: Vec, + flag: Option, + ) -> crate::Result<()> { + tracing::trace!( + target: LOG_TARGET, + peer = ?self.peer, + ?channel_id, + data_len = ?data.len(), + ?flag, + "send data", + ); + + self.rtc + .channel(channel_id) + .ok_or(Error::ChannelDoesntExist)? + .write(true, WebRtcMessage::encode(data, flag).as_ref()) + .map_err(Error::WebRtc) + .map(|_| ()) + } + + /// Open outbound substream. + fn on_open_substream( + &mut self, + protocol: ProtocolName, + fallback_names: Vec, + substream_id: SubstreamId, + opening_permit: Permit, + keep_alive: SubstreamKeepAlive, + ) { + let channel_id = self.rtc.direct_api().create_data_channel(ChannelConfig { + label: "".to_string(), + ordered: false, + reliability: Default::default(), + negotiated: None, + protocol: protocol.to_string(), + }); + + tracing::trace!( + target: LOG_TARGET, + peer = ?self.peer, + ?channel_id, + ?substream_id, + ?protocol, + ?fallback_names, + "open data channel", + ); + + self.pending_outbound.insert( + channel_id, + ChannelContext { protocol, fallback_names, substream_id, opening_permit, keep_alive }, + ); + } + + /// Connection to peer has been closed. + async fn on_connection_closed(&mut self) { + tracing::trace!( + target: LOG_TARGET, + peer = ?self.peer, + "connection closed", + ); + + let _ = self + .protocol_set + .report_connection_closed(self.peer, self.endpoint.connection_id()) + .await; + } + + /// Start the connection event loop without notifying protocols. + pub async fn run_event_loop(mut self) { + loop { + // poll output until we get a timeout + let timeout = match self.rtc.poll_output().unwrap() { + Output::Timeout(v) => v, + Output::Transmit(v) => { + tracing::trace!( + target: LOG_TARGET, + peer = ?self.peer, + datagram_len = ?v.contents.len(), + "transmit data", + ); + + self.socket.try_send_to(&v.contents, v.destination).unwrap(); + continue; + }, + Output::Event(v) => match v { + Event::IceConnectionStateChange(IceConnectionState::Disconnected) => { + tracing::trace!( + target: LOG_TARGET, + peer = ?self.peer, + "ice connection state changed to closed", + ); + return self.on_connection_closed().await; + }, + Event::ChannelOpen(channel_id, name) => { + if let Err(error) = self.on_channel_opened(channel_id, name).await { + tracing::debug!( + target: LOG_TARGET, + peer = ?self.peer, + ?channel_id, + ?error, + "failed to handle opened channel", + ); + } + + continue; + }, + Event::ChannelClose(channel_id) => { + if let Err(error) = self.on_channel_closed(channel_id).await { + tracing::debug!( + target: LOG_TARGET, + peer = ?self.peer, + ?channel_id, + ?error, + "failed to handle closed channel", + ); + } + + continue; + }, + Event::ChannelData(info) => { + if let Err(error) = self.on_inbound_data(info.id, info.data).await { + tracing::debug!( + target: LOG_TARGET, + peer = ?self.peer, + channel_id = ?info.id, + ?error, + "failed to handle channel data", + ); + } + + continue; + }, + event => { + tracing::debug!( + target: LOG_TARGET, + peer = ?self.peer, + ?event, + "unhandled event", + ); + continue; + }, + }, + }; + + let duration = timeout - Instant::now(); + if duration.is_zero() { + self.rtc.handle_input(Input::Timeout(Instant::now())).unwrap(); + continue; + } + + tokio::select! { + biased; + datagram = self.dgram_rx.recv() => match datagram { + Some(datagram) => { + let input = Input::Receive( + Instant::now(), + Receive { + proto: Str0mProtocol::Udp, + source: self.peer_address, + destination: self.local_address, + contents: datagram.as_slice().try_into().unwrap(), + }, + ); + + self.rtc.handle_input(input).unwrap(); + } + None => { + tracing::trace!( + target: LOG_TARGET, + peer = ?self.peer, + "read `None` from `dgram_rx`", + ); + return self.on_connection_closed().await; + } + }, + event = self.handles.next() => match event { + None => unreachable!(), + Some((channel_id, None)) => { + tracing::trace!( + target: LOG_TARGET, + peer = ?self.peer, + ?channel_id, + "channel closed", + ); + + self.rtc.direct_api().close_data_channel(channel_id); + self.channels.insert(channel_id, ChannelState::Closing); + self.handles.remove(&channel_id); + } + Some((channel_id, Some(SubstreamEvent::Message { payload, flag }))) => { + if let Err(error) = self.on_outbound_data(channel_id, payload, flag) { + tracing::debug!( + target: LOG_TARGET, + ?channel_id, + ?flag, + ?error, + "failed to send data to remote peer", + ); + } + } + Some((_, Some(SubstreamEvent::RecvClosed))) => {} + }, + command = self.protocol_set.next() => match command { + None | Some(ProtocolCommand::ForceClose) => { + tracing::trace!( + target: LOG_TARGET, + peer = ?self.peer, + ?command, + "`ProtocolSet` instructed to close connection", + ); + return self.on_connection_closed().await; + } + Some(ProtocolCommand::OpenSubstream { + protocol, + fallback_names, + substream_id, + permit, + keep_alive, + connection_id: _, + }) => { + self.on_open_substream( + protocol, + fallback_names, + substream_id, + permit, + keep_alive, + ); + } + }, + _ = tokio::time::sleep(duration) => { + self.rtc.handle_input(Input::Timeout(Instant::now())).unwrap(); + } + } + } + } } diff --git a/client/litep2p/src/transport/webrtc/mod.rs b/client/litep2p/src/transport/webrtc/mod.rs index a82959ca..9b04d621 100644 --- a/client/litep2p/src/transport/webrtc/mod.rs +++ b/client/litep2p/src/transport/webrtc/mod.rs @@ -21,14 +21,14 @@ //! WebRTC transport. use crate::{ - error::{AddressError, Error}, - transport::{ - manager::TransportHandle, - webrtc::{config::Config, connection::WebRtcConnection, opening::OpeningWebRtcConnection}, - Endpoint, Transport, TransportBuilder, TransportEvent, - }, - types::ConnectionId, - PeerId, + error::{AddressError, Error}, + transport::{ + manager::TransportHandle, + webrtc::{config::Config, connection::WebRtcConnection, opening::OpeningWebRtcConnection}, + Endpoint, Transport, TransportBuilder, TransportEvent, + }, + types::ConnectionId, + PeerId, }; use futures::{future::BoxFuture, Future, Stream}; @@ -37,26 +37,26 @@ use hickory_resolver::TokioResolver; use multiaddr::{multihash::Multihash, Multiaddr, Protocol}; use socket2::{Domain, Socket, Type}; use str0m::{ - channel::{ChannelConfig, ChannelId}, - config::{CryptoProvider, DtlsCert, DtlsCertOptions}, - ice::IceCreds, - net::{DatagramRecv, Protocol as Str0mProtocol, Receive}, - Candidate, DtlsCertConfig, Input, Rtc, + channel::{ChannelConfig, ChannelId}, + config::{CryptoProvider, DtlsCert, DtlsCertOptions}, + ice::IceCreds, + net::{DatagramRecv, Protocol as Str0mProtocol, Receive}, + Candidate, DtlsCertConfig, Input, Rtc, }; use tokio::{ - io::ReadBuf, - net::UdpSocket, - sync::mpsc::{channel, error::TrySendError, Sender}, + io::ReadBuf, + net::UdpSocket, + sync::mpsc::{channel, error::TrySendError, Sender}, }; use std::{ - collections::{hash_map::Entry, HashMap, VecDeque}, - net::{IpAddr, SocketAddr}, - pin::Pin, - sync::Arc, - task::{Context, Poll}, - time::{Duration, Instant}, + collections::{hash_map::Entry, HashMap, VecDeque}, + net::{IpAddr, SocketAddr}, + pin::Pin, + sync::Arc, + task::{Context, Poll}, + time::{Duration, Instant}, }; pub(crate) use substream::Substream; @@ -69,13 +69,13 @@ mod util; pub mod config; pub(super) mod schema { - pub(super) mod webrtc { - include!(concat!(env!("OUT_DIR"), "/webrtc.rs")); - } + pub(super) mod webrtc { + include!(concat!(env!("OUT_DIR"), "/webrtc.rs")); + } - pub(super) mod noise { - include!(concat!(env!("OUT_DIR"), "/noise.rs")); - } + pub(super) mod noise { + include!(concat!(env!("OUT_DIR"), "/noise.rs")); + } } /// Logging target for the file. @@ -87,711 +87,691 @@ const REMOTE_FINGERPRINT: &str = /// Connection context. struct ConnectionContext { - /// Remote peer ID. - peer: PeerId, + /// Remote peer ID. + peer: PeerId, - /// Connection ID. - connection_id: ConnectionId, + /// Connection ID. + connection_id: ConnectionId, - /// TX channel for sending datagrams to the connection event loop. - tx: Sender>, + /// TX channel for sending datagrams to the connection event loop. + tx: Sender>, } /// Events received from opening connections that are handled /// by the [`WebRtcTransport`] event loop. enum ConnectionEvent { - /// Connection established. - ConnectionEstablished { - /// Remote peer ID. - peer: PeerId, - - /// Endpoint. - endpoint: Endpoint, - }, - - /// Connection to peer closed. - ConnectionClosed, - - /// Timeout. - Timeout { - /// Timeout duration. - duration: Duration, - }, + /// Connection established. + ConnectionEstablished { + /// Remote peer ID. + peer: PeerId, + + /// Endpoint. + endpoint: Endpoint, + }, + + /// Connection to peer closed. + ConnectionClosed, + + /// Timeout. + Timeout { + /// Timeout duration. + duration: Duration, + }, } /// WebRTC transport. pub(crate) struct WebRtcTransport { - /// Transport context. - context: TransportHandle, + /// Transport context. + context: TransportHandle, - /// UDP socket. - socket: Arc, + /// UDP socket. + socket: Arc, - /// DTLS certificate. - dtls_cert: DtlsCert, + /// DTLS certificate. + dtls_cert: DtlsCert, - /// Assigned listen addresss. - listen_address: SocketAddr, + /// Assigned listen addresss. + listen_address: SocketAddr, - /// Datagram buffer size. - datagram_buffer_size: usize, + /// Datagram buffer size. + datagram_buffer_size: usize, - /// Connected peers. - open: HashMap, + /// Connected peers. + open: HashMap, - /// OpeningWebRtc connections. - opening: HashMap, + /// OpeningWebRtc connections. + opening: HashMap, - /// `ConnectionId -> SocketAddr` mappings. - connections: HashMap, + /// `ConnectionId -> SocketAddr` mappings. + connections: HashMap, - /// Pending timeouts. - timeouts: HashMap>, + /// Pending timeouts. + timeouts: HashMap>, - /// Pending events. - pending_events: VecDeque, + /// Pending events. + pending_events: VecDeque, } impl WebRtcTransport { - /// Extract socket address and `PeerId`, if found, from `address`. - fn get_socket_address(address: &Multiaddr) -> crate::Result<(SocketAddr, Option)> { - tracing::trace!(target: LOG_TARGET, ?address, "parse multi address"); - - let mut iter = address.iter(); - let socket_address = match iter.next() { - Some(Protocol::Ip6(address)) => match iter.next() { - Some(Protocol::Udp(port)) => SocketAddr::new(IpAddr::V6(address), port), - protocol => { - tracing::error!( - target: LOG_TARGET, - ?protocol, - "invalid transport protocol, expected `Upd`", - ); - return Err(Error::AddressError(AddressError::InvalidProtocol)); - } - }, - Some(Protocol::Ip4(address)) => match iter.next() { - Some(Protocol::Udp(port)) => SocketAddr::new(IpAddr::V4(address), port), - protocol => { - tracing::error!( - target: LOG_TARGET, - ?protocol, - "invalid transport protocol, expected `Udp`", - ); - return Err(Error::AddressError(AddressError::InvalidProtocol)); - } - }, - protocol => { - tracing::error!(target: LOG_TARGET, ?protocol, "invalid transport protocol"); - return Err(Error::AddressError(AddressError::InvalidProtocol)); - } - }; - - match iter.next() { - Some(Protocol::WebRTC) => {} - protocol => { - tracing::error!( - target: LOG_TARGET, - ?protocol, - "invalid protocol, expected `WebRTC`" - ); - return Err(Error::AddressError(AddressError::InvalidProtocol)); - } - } - - let maybe_peer = match iter.next() { - Some(Protocol::P2p(multihash)) => Some(PeerId::from_multihash(multihash)?), - None => None, - protocol => { - tracing::error!( - target: LOG_TARGET, - ?protocol, - "invalid protocol, expected `P2p` or `None`" - ); - return Err(Error::AddressError(AddressError::InvalidProtocol)); - } - }; - - Ok((socket_address, maybe_peer)) - } - - /// Create RTC client and open channel for Noise handshake. - fn make_rtc_client( - &self, - ufrag: &str, - pass: &str, - source: SocketAddr, - destination: SocketAddr, - ) -> (Rtc, ChannelId) { - let mut rtc = Rtc::builder() - .set_ice_lite(true) - .set_dtls_cert_config(DtlsCertConfig::PregeneratedCert(self.dtls_cert.clone())) - .set_fingerprint_verification(false) - .build(); - rtc.add_local_candidate(Candidate::host(destination, Str0mProtocol::Udp).unwrap()); - rtc.add_remote_candidate(Candidate::host(source, Str0mProtocol::Udp).unwrap()); - rtc.direct_api() - .set_remote_fingerprint(REMOTE_FINGERPRINT.parse().expect("parse() to succeed")); - rtc.direct_api().set_remote_ice_credentials(IceCreds { - ufrag: ufrag.to_owned(), - pass: pass.to_owned(), - }); - rtc.direct_api().set_local_ice_credentials(IceCreds { - ufrag: ufrag.to_owned(), - pass: pass.to_owned(), - }); - rtc.direct_api().set_ice_controlling(false); - rtc.direct_api().start_dtls(false).unwrap(); - rtc.direct_api().start_sctp(false); - - let noise_channel_id = rtc.direct_api().create_data_channel(ChannelConfig { - label: "noise".to_string(), - ordered: false, - reliability: Default::default(), - negotiated: Some(0), - protocol: "".to_string(), - }); - - (rtc, noise_channel_id) - } - - /// Poll opening connection. - fn poll_connection(&mut self, source: &SocketAddr) -> ConnectionEvent { - let Some(connection) = self.opening.get_mut(source) else { - tracing::warn!( - target: LOG_TARGET, - ?source, - "connection doesn't exist", - ); - return ConnectionEvent::ConnectionClosed; - }; - - loop { - match connection.poll_process() { - opening::WebRtcEvent::Timeout { timeout } => { - let duration = timeout - Instant::now(); - - match duration.is_zero() { - true => match connection.on_timeout() { - Ok(()) => continue, - Err(error) => { - tracing::debug!( - target: LOG_TARGET, - ?source, - ?error, - "failed to handle timeout", - ); - - return ConnectionEvent::ConnectionClosed; - } - }, - false => return ConnectionEvent::Timeout { duration }, - } - } - opening::WebRtcEvent::Transmit { - destination, - datagram, - } => - if let Err(error) = self.socket.try_send_to(&datagram, destination) { - tracing::warn!( - target: LOG_TARGET, - ?source, - ?error, - "failed to send datagram", - ); - }, - opening::WebRtcEvent::ConnectionClosed => return ConnectionEvent::ConnectionClosed, - opening::WebRtcEvent::ConnectionOpened { peer, endpoint } => { - return ConnectionEvent::ConnectionEstablished { peer, endpoint }; - } - } - } - } - - /// Handle socket input. - /// - /// If the datagram was received from an active client, it's dispatched to the connection - /// handler, if there is space in the queue. If the datagram opened a new connection or it - /// belonged to a client who is opening, the event loop is instructed to poll the client - /// until it timeouts. - /// - /// Returns `true` if the client should be polled. - fn on_socket_input(&mut self, source: SocketAddr, buffer: Vec) -> crate::Result { - if let Entry::Occupied(mut entry) = self.open.entry(source) { - let ConnectionContext { - peer, - connection_id, - tx, - } = entry.get_mut(); - - match tx.try_send(buffer) { - Ok(_) => return Ok(false), - Err(TrySendError::Full(_)) => { - tracing::warn!( - target: LOG_TARGET, - ?source, - ?peer, - ?connection_id, - "channel full, dropping datagram", - ); - - return Ok(false); - } - Err(TrySendError::Closed(_)) => { - tracing::debug!( - target: LOG_TARGET, - ?source, - ?peer, - ?connection_id, - "connection closed, removing stale entry", - ); - - entry.remove(); - return Ok(false); - } - } - } - - if buffer.is_empty() { - // str0m crate panics if the buffer doesn't contain at least one byte: - // https://github.com/algesten/str0m/blob/2c5dc8ee8ddead08699dd6852a27476af6992a5c/src/io/mod.rs#L222 - return Err(Error::InvalidData); - } - - // if the peer doesn't exist, decode the message and expect to receive `Stun` - // so that a new connection can be initialized - let contents: DatagramRecv = - buffer.as_slice().try_into().map_err(|_| Error::InvalidData)?; - - // Handle non stun packets. - if !is_stun_packet(&buffer) { - tracing::debug!( - target: LOG_TARGET, - ?source, - "received non-stun message" - ); - - match self.opening.get_mut(&source) { - Some(connection) => - if let Err(error) = connection.on_input(contents) { - tracing::error!( - target: LOG_TARGET, - ?error, - ?source, - "failed to handle inbound datagram" - ); - }, - None => { - tracing::warn!( - target: LOG_TARGET, - ?source, - "received non-stun message from unknown peer", - ); - return Err(Error::InvalidData); - } - }; - - return Ok(true); - } - - let stun_message = - str0m::ice::StunMessage::parse(&buffer).map_err(|_| Error::InvalidData)?; - let Some((ufrag, pass)) = stun_message.split_username() else { - tracing::warn!( - target: LOG_TARGET, - ?source, - "failed to split username/password", - ); - return Err(Error::InvalidData); - }; - - tracing::debug!( - target: LOG_TARGET, - ?source, - ?ufrag, - ?pass, - "received stun message" - ); - - // create new `Rtc` object for the peer and give it the received STUN message - let (mut rtc, noise_channel_id) = - self.make_rtc_client(ufrag, pass, source, self.socket.local_addr().unwrap()); - - rtc.handle_input(Input::Receive( - Instant::now(), - Receive { - source, - proto: Str0mProtocol::Udp, - destination: self.socket.local_addr().unwrap(), - contents, - }, - )) - .expect("client to handle input successfully"); - - let connection_id = self.context.next_connection_id(); - let connection = OpeningWebRtcConnection::new( - rtc, - connection_id, - noise_channel_id, - self.context.keypair.clone(), - source, - self.listen_address, - ); - self.opening.insert(source, connection); - - Ok(true) - } + /// Extract socket address and `PeerId`, if found, from `address`. + fn get_socket_address(address: &Multiaddr) -> crate::Result<(SocketAddr, Option)> { + tracing::trace!(target: LOG_TARGET, ?address, "parse multi address"); + + let mut iter = address.iter(); + let socket_address = match iter.next() { + Some(Protocol::Ip6(address)) => match iter.next() { + Some(Protocol::Udp(port)) => SocketAddr::new(IpAddr::V6(address), port), + protocol => { + tracing::error!( + target: LOG_TARGET, + ?protocol, + "invalid transport protocol, expected `Upd`", + ); + return Err(Error::AddressError(AddressError::InvalidProtocol)); + }, + }, + Some(Protocol::Ip4(address)) => match iter.next() { + Some(Protocol::Udp(port)) => SocketAddr::new(IpAddr::V4(address), port), + protocol => { + tracing::error!( + target: LOG_TARGET, + ?protocol, + "invalid transport protocol, expected `Udp`", + ); + return Err(Error::AddressError(AddressError::InvalidProtocol)); + }, + }, + protocol => { + tracing::error!(target: LOG_TARGET, ?protocol, "invalid transport protocol"); + return Err(Error::AddressError(AddressError::InvalidProtocol)); + }, + }; + + match iter.next() { + Some(Protocol::WebRTC) => {}, + protocol => { + tracing::error!( + target: LOG_TARGET, + ?protocol, + "invalid protocol, expected `WebRTC`" + ); + return Err(Error::AddressError(AddressError::InvalidProtocol)); + }, + } + + let maybe_peer = match iter.next() { + Some(Protocol::P2p(multihash)) => Some(PeerId::from_multihash(multihash)?), + None => None, + protocol => { + tracing::error!( + target: LOG_TARGET, + ?protocol, + "invalid protocol, expected `P2p` or `None`" + ); + return Err(Error::AddressError(AddressError::InvalidProtocol)); + }, + }; + + Ok((socket_address, maybe_peer)) + } + + /// Create RTC client and open channel for Noise handshake. + fn make_rtc_client( + &self, + ufrag: &str, + pass: &str, + source: SocketAddr, + destination: SocketAddr, + ) -> (Rtc, ChannelId) { + let mut rtc = Rtc::builder() + .set_ice_lite(true) + .set_dtls_cert_config(DtlsCertConfig::PregeneratedCert(self.dtls_cert.clone())) + .set_fingerprint_verification(false) + .build(); + rtc.add_local_candidate(Candidate::host(destination, Str0mProtocol::Udp).unwrap()); + rtc.add_remote_candidate(Candidate::host(source, Str0mProtocol::Udp).unwrap()); + rtc.direct_api() + .set_remote_fingerprint(REMOTE_FINGERPRINT.parse().expect("parse() to succeed")); + rtc.direct_api().set_remote_ice_credentials(IceCreds { + ufrag: ufrag.to_owned(), + pass: pass.to_owned(), + }); + rtc.direct_api() + .set_local_ice_credentials(IceCreds { ufrag: ufrag.to_owned(), pass: pass.to_owned() }); + rtc.direct_api().set_ice_controlling(false); + rtc.direct_api().start_dtls(false).unwrap(); + rtc.direct_api().start_sctp(false); + + let noise_channel_id = rtc.direct_api().create_data_channel(ChannelConfig { + label: "noise".to_string(), + ordered: false, + reliability: Default::default(), + negotiated: Some(0), + protocol: "".to_string(), + }); + + (rtc, noise_channel_id) + } + + /// Poll opening connection. + fn poll_connection(&mut self, source: &SocketAddr) -> ConnectionEvent { + let Some(connection) = self.opening.get_mut(source) else { + tracing::warn!( + target: LOG_TARGET, + ?source, + "connection doesn't exist", + ); + return ConnectionEvent::ConnectionClosed; + }; + + loop { + match connection.poll_process() { + opening::WebRtcEvent::Timeout { timeout } => { + let duration = timeout - Instant::now(); + + match duration.is_zero() { + true => match connection.on_timeout() { + Ok(()) => continue, + Err(error) => { + tracing::debug!( + target: LOG_TARGET, + ?source, + ?error, + "failed to handle timeout", + ); + + return ConnectionEvent::ConnectionClosed; + }, + }, + false => return ConnectionEvent::Timeout { duration }, + } + }, + opening::WebRtcEvent::Transmit { destination, datagram } => + if let Err(error) = self.socket.try_send_to(&datagram, destination) { + tracing::warn!( + target: LOG_TARGET, + ?source, + ?error, + "failed to send datagram", + ); + }, + opening::WebRtcEvent::ConnectionClosed => return ConnectionEvent::ConnectionClosed, + opening::WebRtcEvent::ConnectionOpened { peer, endpoint } => { + return ConnectionEvent::ConnectionEstablished { peer, endpoint }; + }, + } + } + } + + /// Handle socket input. + /// + /// If the datagram was received from an active client, it's dispatched to the connection + /// handler, if there is space in the queue. If the datagram opened a new connection or it + /// belonged to a client who is opening, the event loop is instructed to poll the client + /// until it timeouts. + /// + /// Returns `true` if the client should be polled. + fn on_socket_input(&mut self, source: SocketAddr, buffer: Vec) -> crate::Result { + if let Entry::Occupied(mut entry) = self.open.entry(source) { + let ConnectionContext { peer, connection_id, tx } = entry.get_mut(); + + match tx.try_send(buffer) { + Ok(_) => return Ok(false), + Err(TrySendError::Full(_)) => { + tracing::warn!( + target: LOG_TARGET, + ?source, + ?peer, + ?connection_id, + "channel full, dropping datagram", + ); + + return Ok(false); + }, + Err(TrySendError::Closed(_)) => { + tracing::debug!( + target: LOG_TARGET, + ?source, + ?peer, + ?connection_id, + "connection closed, removing stale entry", + ); + + entry.remove(); + return Ok(false); + }, + } + } + + if buffer.is_empty() { + // str0m crate panics if the buffer doesn't contain at least one byte: + // https://github.com/algesten/str0m/blob/2c5dc8ee8ddead08699dd6852a27476af6992a5c/src/io/mod.rs#L222 + return Err(Error::InvalidData); + } + + // if the peer doesn't exist, decode the message and expect to receive `Stun` + // so that a new connection can be initialized + let contents: DatagramRecv = + buffer.as_slice().try_into().map_err(|_| Error::InvalidData)?; + + // Handle non stun packets. + if !is_stun_packet(&buffer) { + tracing::debug!( + target: LOG_TARGET, + ?source, + "received non-stun message" + ); + + match self.opening.get_mut(&source) { + Some(connection) => + if let Err(error) = connection.on_input(contents) { + tracing::error!( + target: LOG_TARGET, + ?error, + ?source, + "failed to handle inbound datagram" + ); + }, + None => { + tracing::warn!( + target: LOG_TARGET, + ?source, + "received non-stun message from unknown peer", + ); + return Err(Error::InvalidData); + }, + }; + + return Ok(true); + } + + let stun_message = + str0m::ice::StunMessage::parse(&buffer).map_err(|_| Error::InvalidData)?; + let Some((ufrag, pass)) = stun_message.split_username() else { + tracing::warn!( + target: LOG_TARGET, + ?source, + "failed to split username/password", + ); + return Err(Error::InvalidData); + }; + + tracing::debug!( + target: LOG_TARGET, + ?source, + ?ufrag, + ?pass, + "received stun message" + ); + + // create new `Rtc` object for the peer and give it the received STUN message + let (mut rtc, noise_channel_id) = + self.make_rtc_client(ufrag, pass, source, self.socket.local_addr().unwrap()); + + rtc.handle_input(Input::Receive( + Instant::now(), + Receive { + source, + proto: Str0mProtocol::Udp, + destination: self.socket.local_addr().unwrap(), + contents, + }, + )) + .expect("client to handle input successfully"); + + let connection_id = self.context.next_connection_id(); + let connection = OpeningWebRtcConnection::new( + rtc, + connection_id, + noise_channel_id, + self.context.keypair.clone(), + source, + self.listen_address, + ); + self.opening.insert(source, connection); + + Ok(true) + } } impl TransportBuilder for WebRtcTransport { - type Config = Config; - type Transport = WebRtcTransport; - - /// Create new [`Transport`] object. - fn new( - context: TransportHandle, - config: Self::Config, - _resolver: Arc, - ) -> crate::Result<(Self, Vec)> - where - Self: Sized, - { - tracing::info!( - target: LOG_TARGET, - listen_addresses = ?config.listen_addresses, - "start webrtc transport", - ); - - let (listen_address, _) = Self::get_socket_address(&config.listen_addresses[0])?; - - let socket = if listen_address.is_ipv4() { - let socket = Socket::new(Domain::IPV4, Type::DGRAM, Some(socket2::Protocol::UDP))?; - socket.bind(&listen_address.into())?; - socket - } else { - let socket = Socket::new(Domain::IPV6, Type::DGRAM, Some(socket2::Protocol::UDP))?; - socket.set_only_v6(true)?; - socket.bind(&listen_address.into())?; - socket - }; - - socket.set_reuse_address(true)?; - socket.set_nonblocking(true)?; - #[cfg(unix)] - socket.set_reuse_port(true)?; - - let socket = UdpSocket::from_std(socket.into())?; - let listen_address = socket.local_addr()?; - let dtls_cert = DtlsCert::new(CryptoProvider::OpenSsl, DtlsCertOptions::default()); - - let listen_multi_addresses = { - let fingerprint = dtls_cert.fingerprint().bytes; - - const MULTIHASH_SHA256_CODE: u64 = 0x12; - let certificate = Multihash::wrap(MULTIHASH_SHA256_CODE, &fingerprint) - .expect("fingerprint's len to be 32 bytes"); - - vec![Multiaddr::empty() - .with(Protocol::from(listen_address.ip())) - .with(Protocol::Udp(listen_address.port())) - .with(Protocol::WebRTC) - .with(Protocol::Certhash(certificate))] - }; - - Ok(( - Self { - context, - dtls_cert, - listen_address, - open: HashMap::new(), - opening: HashMap::new(), - connections: HashMap::new(), - socket: Arc::new(socket), - timeouts: HashMap::new(), - pending_events: VecDeque::new(), - datagram_buffer_size: config.datagram_buffer_size, - }, - listen_multi_addresses, - )) - } + type Config = Config; + type Transport = WebRtcTransport; + + /// Create new [`Transport`] object. + fn new( + context: TransportHandle, + config: Self::Config, + _resolver: Arc, + ) -> crate::Result<(Self, Vec)> + where + Self: Sized, + { + tracing::info!( + target: LOG_TARGET, + listen_addresses = ?config.listen_addresses, + "start webrtc transport", + ); + + let (listen_address, _) = Self::get_socket_address(&config.listen_addresses[0])?; + + let socket = if listen_address.is_ipv4() { + let socket = Socket::new(Domain::IPV4, Type::DGRAM, Some(socket2::Protocol::UDP))?; + socket.bind(&listen_address.into())?; + socket + } else { + let socket = Socket::new(Domain::IPV6, Type::DGRAM, Some(socket2::Protocol::UDP))?; + socket.set_only_v6(true)?; + socket.bind(&listen_address.into())?; + socket + }; + + socket.set_reuse_address(true)?; + socket.set_nonblocking(true)?; + #[cfg(unix)] + socket.set_reuse_port(true)?; + + let socket = UdpSocket::from_std(socket.into())?; + let listen_address = socket.local_addr()?; + let dtls_cert = DtlsCert::new(CryptoProvider::OpenSsl, DtlsCertOptions::default()); + + let listen_multi_addresses = { + let fingerprint = dtls_cert.fingerprint().bytes; + + const MULTIHASH_SHA256_CODE: u64 = 0x12; + let certificate = Multihash::wrap(MULTIHASH_SHA256_CODE, &fingerprint) + .expect("fingerprint's len to be 32 bytes"); + + vec![Multiaddr::empty() + .with(Protocol::from(listen_address.ip())) + .with(Protocol::Udp(listen_address.port())) + .with(Protocol::WebRTC) + .with(Protocol::Certhash(certificate))] + }; + + Ok(( + Self { + context, + dtls_cert, + listen_address, + open: HashMap::new(), + opening: HashMap::new(), + connections: HashMap::new(), + socket: Arc::new(socket), + timeouts: HashMap::new(), + pending_events: VecDeque::new(), + datagram_buffer_size: config.datagram_buffer_size, + }, + listen_multi_addresses, + )) + } } impl Transport for WebRtcTransport { - fn dial(&mut self, connection_id: ConnectionId, address: Multiaddr) -> crate::Result<()> { - tracing::warn!( - target: LOG_TARGET, - ?connection_id, - ?address, - "webrtc cannot dial", - ); - - debug_assert!(false); - Err(Error::NotSupported("webrtc cannot dial peers".to_string())) - } - - fn accept_pending(&mut self, connection_id: ConnectionId) -> crate::Result<()> { - tracing::trace!( - target: LOG_TARGET, - ?connection_id, - "webrtc cannot accept pending connections", - ); - - debug_assert!(false); - Err(Error::NotSupported( - "webrtc cannot accept pending connections".to_string(), - )) - } - - fn reject_pending(&mut self, connection_id: ConnectionId) -> crate::Result<()> { - tracing::trace!( - target: LOG_TARGET, - ?connection_id, - "webrtc cannot reject pending connections", - ); - - debug_assert!(false); - Err(Error::NotSupported( - "webrtc cannot reject pending connections".to_string(), - )) - } - - fn accept( - &mut self, - connection_id: ConnectionId, - ) -> crate::Result>> { - tracing::trace!( - target: LOG_TARGET, - ?connection_id, - "inbound connection accepted", - ); - - let (peer, source, endpoint) = - self.connections.remove(&connection_id).ok_or_else(|| { - tracing::warn!( - target: LOG_TARGET, - ?connection_id, - "pending connection doens't exist", - ); - - Error::InvalidState - })?; - - let connection = self.opening.remove(&source).ok_or_else(|| { - tracing::warn!( - target: LOG_TARGET, - ?connection_id, - "pending connection doens't exist", - ); - - Error::InvalidState - })?; - - let rtc = connection.on_accept()?; - let (tx, rx) = channel(self.datagram_buffer_size); - let mut protocol_set = self.context.protocol_set(connection_id); - let connection_id = endpoint.connection_id(); - let endpoint_clone = endpoint.clone(); - let executor = self.context.executor.clone(); - let socket = Arc::clone(&self.socket); - let listen_address = self.listen_address; - - self.open.insert( - source, - ConnectionContext { - tx, - peer, - connection_id, - }, - ); - - Ok(Box::pin(async move { - // First, notify all protocols about the connection establishment - protocol_set.report_connection_established(peer, endpoint_clone).await?; - - // After protocols are notified, create connection and spawn event loop - let connection = WebRtcConnection::new( - rtc, - peer, - source, - listen_address, - socket, - protocol_set, - endpoint, - rx, - ); - - executor.run(Box::pin(async move { - connection.run_event_loop().await; - })); - - Ok(()) - })) - } - - fn reject(&mut self, connection_id: ConnectionId) -> crate::Result<()> { - tracing::trace!( - target: LOG_TARGET, - ?connection_id, - "inbound connection rejected", - ); - - let (_, source, _) = self.connections.remove(&connection_id).ok_or_else(|| { - tracing::warn!( - target: LOG_TARGET, - ?connection_id, - "pending connection doens't exist", - ); - - Error::InvalidState - })?; - - self.opening - .remove(&source) - .ok_or_else(|| { - tracing::warn!( - target: LOG_TARGET, - ?connection_id, - "pending connection doens't exist", - ); - - Error::InvalidState - }) - .map(|_| ()) - } - - fn open( - &mut self, - _connection_id: ConnectionId, - _addresses: Vec, - ) -> crate::Result<()> { - Ok(()) - } - - fn negotiate(&mut self, _connection_id: ConnectionId) -> crate::Result<()> { - Ok(()) - } - - fn cancel(&mut self, _connection_id: ConnectionId) {} + fn dial(&mut self, connection_id: ConnectionId, address: Multiaddr) -> crate::Result<()> { + tracing::warn!( + target: LOG_TARGET, + ?connection_id, + ?address, + "webrtc cannot dial", + ); + + debug_assert!(false); + Err(Error::NotSupported("webrtc cannot dial peers".to_string())) + } + + fn accept_pending(&mut self, connection_id: ConnectionId) -> crate::Result<()> { + tracing::trace!( + target: LOG_TARGET, + ?connection_id, + "webrtc cannot accept pending connections", + ); + + debug_assert!(false); + Err(Error::NotSupported("webrtc cannot accept pending connections".to_string())) + } + + fn reject_pending(&mut self, connection_id: ConnectionId) -> crate::Result<()> { + tracing::trace!( + target: LOG_TARGET, + ?connection_id, + "webrtc cannot reject pending connections", + ); + + debug_assert!(false); + Err(Error::NotSupported("webrtc cannot reject pending connections".to_string())) + } + + fn accept( + &mut self, + connection_id: ConnectionId, + ) -> crate::Result>> { + tracing::trace!( + target: LOG_TARGET, + ?connection_id, + "inbound connection accepted", + ); + + let (peer, source, endpoint) = + self.connections.remove(&connection_id).ok_or_else(|| { + tracing::warn!( + target: LOG_TARGET, + ?connection_id, + "pending connection doens't exist", + ); + + Error::InvalidState + })?; + + let connection = self.opening.remove(&source).ok_or_else(|| { + tracing::warn!( + target: LOG_TARGET, + ?connection_id, + "pending connection doens't exist", + ); + + Error::InvalidState + })?; + + let rtc = connection.on_accept()?; + let (tx, rx) = channel(self.datagram_buffer_size); + let mut protocol_set = self.context.protocol_set(connection_id); + let connection_id = endpoint.connection_id(); + let endpoint_clone = endpoint.clone(); + let executor = self.context.executor.clone(); + let socket = Arc::clone(&self.socket); + let listen_address = self.listen_address; + + self.open.insert(source, ConnectionContext { tx, peer, connection_id }); + + Ok(Box::pin(async move { + // First, notify all protocols about the connection establishment + protocol_set.report_connection_established(peer, endpoint_clone).await?; + + // After protocols are notified, create connection and spawn event loop + let connection = WebRtcConnection::new( + rtc, + peer, + source, + listen_address, + socket, + protocol_set, + endpoint, + rx, + ); + + executor.run(Box::pin(async move { + connection.run_event_loop().await; + })); + + Ok(()) + })) + } + + fn reject(&mut self, connection_id: ConnectionId) -> crate::Result<()> { + tracing::trace!( + target: LOG_TARGET, + ?connection_id, + "inbound connection rejected", + ); + + let (_, source, _) = self.connections.remove(&connection_id).ok_or_else(|| { + tracing::warn!( + target: LOG_TARGET, + ?connection_id, + "pending connection doens't exist", + ); + + Error::InvalidState + })?; + + self.opening + .remove(&source) + .ok_or_else(|| { + tracing::warn!( + target: LOG_TARGET, + ?connection_id, + "pending connection doens't exist", + ); + + Error::InvalidState + }) + .map(|_| ()) + } + + fn open( + &mut self, + _connection_id: ConnectionId, + _addresses: Vec, + ) -> crate::Result<()> { + Ok(()) + } + + fn negotiate(&mut self, _connection_id: ConnectionId) -> crate::Result<()> { + Ok(()) + } + + fn cancel(&mut self, _connection_id: ConnectionId) {} } impl Stream for WebRtcTransport { - type Item = TransportEvent; - - fn poll_next(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll> { - let this = Pin::into_inner(self); - - if let Some(event) = this.pending_events.pop_front() { - return Poll::Ready(Some(event)); - } - - loop { - let mut buf = vec![0u8; 16384]; - let mut read_buf = ReadBuf::new(&mut buf); - - match this.socket.poll_recv_from(cx, &mut read_buf) { - Poll::Pending => break, - Poll::Ready(Err(error)) => { - tracing::info!( - target: LOG_TARGET, - ?error, - "webrtc udp socket closed", - ); - - return Poll::Ready(None); - } - Poll::Ready(Ok(source)) => { - let nread = read_buf.filled().len(); - buf.truncate(nread); - - match this.on_socket_input(source, buf) { - Ok(false) => {} - Ok(true) => loop { - match this.poll_connection(&source) { - ConnectionEvent::ConnectionEstablished { peer, endpoint } => { - this.connections.insert( - endpoint.connection_id(), - (peer, source, endpoint.clone()), - ); - - // keep polling the connection until it registers a timeout - this.pending_events.push_back( - TransportEvent::ConnectionEstablished { peer, endpoint }, - ); - } - ConnectionEvent::ConnectionClosed => { - this.opening.remove(&source); - this.timeouts.remove(&source); - - break; - } - ConnectionEvent::Timeout { duration } => { - this.timeouts.insert( - source, - Box::pin(async move { Delay::new(duration).await }), - ); - - break; - } - } - }, - Err(error) => { - tracing::debug!( - target: LOG_TARGET, - ?source, - ?error, - "failed to handle datagram", - ); - } - } - } - } - } - - // go over all pending timeouts to see if any of them have expired - // and if any of them have, poll the connection until it registers another timeout - let pending_events = this - .timeouts - .iter_mut() - .filter_map(|(source, mut delay)| match Pin::new(&mut delay).poll(cx) { - Poll::Pending => None, - Poll::Ready(_) => Some(*source), - }) - .collect::>() - .into_iter() - .filter_map(|source| { - let mut pending_event = None; - - loop { - match this.poll_connection(&source) { - ConnectionEvent::ConnectionEstablished { peer, endpoint } => { - this.connections - .insert(endpoint.connection_id(), (peer, source, endpoint.clone())); - - // keep polling the connection until it registers a timeout - pending_event = - Some(TransportEvent::ConnectionEstablished { peer, endpoint }); - } - ConnectionEvent::ConnectionClosed => { - this.opening.remove(&source); - return None; - } - ConnectionEvent::Timeout { duration } => { - this.timeouts.insert(source, Box::pin(Delay::new(duration))); - break; - } - } - } - - pending_event - }) - .collect::>(); - - this.timeouts.retain(|source, _| this.opening.contains_key(source)); - this.pending_events.extend(pending_events); - this.pending_events - .pop_front() - .map_or(Poll::Pending, |event| Poll::Ready(Some(event))) - } + type Item = TransportEvent; + + fn poll_next(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll> { + let this = Pin::into_inner(self); + + if let Some(event) = this.pending_events.pop_front() { + return Poll::Ready(Some(event)); + } + + loop { + let mut buf = vec![0u8; 16384]; + let mut read_buf = ReadBuf::new(&mut buf); + + match this.socket.poll_recv_from(cx, &mut read_buf) { + Poll::Pending => break, + Poll::Ready(Err(error)) => { + tracing::info!( + target: LOG_TARGET, + ?error, + "webrtc udp socket closed", + ); + + return Poll::Ready(None); + }, + Poll::Ready(Ok(source)) => { + let nread = read_buf.filled().len(); + buf.truncate(nread); + + match this.on_socket_input(source, buf) { + Ok(false) => {}, + Ok(true) => loop { + match this.poll_connection(&source) { + ConnectionEvent::ConnectionEstablished { peer, endpoint } => { + this.connections.insert( + endpoint.connection_id(), + (peer, source, endpoint.clone()), + ); + + // keep polling the connection until it registers a timeout + this.pending_events.push_back( + TransportEvent::ConnectionEstablished { peer, endpoint }, + ); + }, + ConnectionEvent::ConnectionClosed => { + this.opening.remove(&source); + this.timeouts.remove(&source); + + break; + }, + ConnectionEvent::Timeout { duration } => { + this.timeouts.insert( + source, + Box::pin(async move { Delay::new(duration).await }), + ); + + break; + }, + } + }, + Err(error) => { + tracing::debug!( + target: LOG_TARGET, + ?source, + ?error, + "failed to handle datagram", + ); + }, + } + }, + } + } + + // go over all pending timeouts to see if any of them have expired + // and if any of them have, poll the connection until it registers another timeout + let pending_events = this + .timeouts + .iter_mut() + .filter_map(|(source, mut delay)| match Pin::new(&mut delay).poll(cx) { + Poll::Pending => None, + Poll::Ready(_) => Some(*source), + }) + .collect::>() + .into_iter() + .filter_map(|source| { + let mut pending_event = None; + + loop { + match this.poll_connection(&source) { + ConnectionEvent::ConnectionEstablished { peer, endpoint } => { + this.connections + .insert(endpoint.connection_id(), (peer, source, endpoint.clone())); + + // keep polling the connection until it registers a timeout + pending_event = + Some(TransportEvent::ConnectionEstablished { peer, endpoint }); + }, + ConnectionEvent::ConnectionClosed => { + this.opening.remove(&source); + return None; + }, + ConnectionEvent::Timeout { duration } => { + this.timeouts.insert(source, Box::pin(Delay::new(duration))); + break; + }, + } + } + + pending_event + }) + .collect::>(); + + this.timeouts.retain(|source, _| this.opening.contains_key(source)); + this.pending_events.extend(pending_events); + this.pending_events + .pop_front() + .map_or(Poll::Pending, |event| Poll::Ready(Some(event))) + } } /// Check if the packet received is STUN. @@ -815,7 +795,7 @@ impl Stream for WebRtcTransport { /// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ /// ``` fn is_stun_packet(bytes: &[u8]) -> bool { - const STUN_MAGIC_COOKIE: [u8; 4] = [0x21, 0x12, 0xA4, 0x42]; - // 20 bytes for the header, then follows attributes. - bytes.len() >= 20 && bytes[0] < 2 && bytes[4..8] == STUN_MAGIC_COOKIE + const STUN_MAGIC_COOKIE: [u8; 4] = [0x21, 0x12, 0xA4, 0x42]; + // 20 bytes for the header, then follows attributes. + bytes.len() >= 20 && bytes[0] < 2 && bytes[4..8] == STUN_MAGIC_COOKIE } diff --git a/client/litep2p/src/transport/webrtc/opening.rs b/client/litep2p/src/transport/webrtc/opening.rs index cbc2470f..582e6541 100644 --- a/client/litep2p/src/transport/webrtc/opening.rs +++ b/client/litep2p/src/transport/webrtc/opening.rs @@ -21,19 +21,19 @@ //! WebRTC handshaking code for an opening connection. use crate::{ - config::Role, - crypto::{dilithium::Keypair, noise::NoiseContext}, - transport::{webrtc::util::WebRtcMessage, Endpoint}, - types::ConnectionId, - Error, PeerId, + config::Role, + crypto::{dilithium::Keypair, noise::NoiseContext}, + transport::{webrtc::util::WebRtcMessage, Endpoint}, + types::ConnectionId, + Error, PeerId, }; use multiaddr::{multihash::Multihash, Multiaddr, Protocol}; use str0m::{ - channel::ChannelId, - config::Fingerprint, - net::{DatagramRecv, DatagramSend, Protocol as Str0mProtocol, Receive}, - Event, IceConnectionState, Input, Output, Rtc, + channel::ChannelId, + config::Fingerprint, + net::{DatagramRecv, DatagramSend, Protocol as Str0mProtocol, Receive}, + Event, IceConnectionState, Input, Output, Rtc, }; use std::{net::SocketAddr, time::Instant}; @@ -43,45 +43,45 @@ const LOG_TARGET: &str = "litep2p::webrtc::connection"; /// Create Noise prologue. fn noise_prologue(local_fingerprint: Vec, remote_fingerprint: Vec) -> Vec { - const PREFIX: &[u8] = b"libp2p-webrtc-noise:"; - let mut prologue = - Vec::with_capacity(PREFIX.len() + local_fingerprint.len() + remote_fingerprint.len()); - prologue.extend_from_slice(PREFIX); - prologue.extend_from_slice(&remote_fingerprint); - prologue.extend_from_slice(&local_fingerprint); - - prologue + const PREFIX: &[u8] = b"libp2p-webrtc-noise:"; + let mut prologue = + Vec::with_capacity(PREFIX.len() + local_fingerprint.len() + remote_fingerprint.len()); + prologue.extend_from_slice(PREFIX); + prologue.extend_from_slice(&remote_fingerprint); + prologue.extend_from_slice(&local_fingerprint); + + prologue } /// WebRTC connection event. #[derive(Debug)] pub enum WebRtcEvent { - /// Register timeout for the connection. - Timeout { - /// Timeout. - timeout: Instant, - }, - - /// Transmit data to remote peer. - Transmit { - /// Destination. - destination: SocketAddr, - - /// Datagram to transmit. - datagram: DatagramSend, - }, - - /// Connection closed. - ConnectionClosed, - - /// Connection established. - ConnectionOpened { - /// Remote peer ID. - peer: PeerId, - - /// Endpoint. - endpoint: Endpoint, - }, + /// Register timeout for the connection. + Timeout { + /// Timeout. + timeout: Instant, + }, + + /// Transmit data to remote peer. + Transmit { + /// Destination. + destination: SocketAddr, + + /// Datagram to transmit. + datagram: DatagramSend, + }, + + /// Connection closed. + ConnectionClosed, + + /// Connection established. + ConnectionOpened { + /// Remote peer ID. + peer: PeerId, + + /// Endpoint. + endpoint: Endpoint, + }, } /// Opening WebRTC connection. @@ -90,246 +90,246 @@ pub enum WebRtcEvent { /// After the handshake is done, this object is destroyed and a new WebRTC connection object /// is created which implements a normal connection event loop dealing with substreams. pub struct OpeningWebRtcConnection { - /// WebRTC object - rtc: Rtc, + /// WebRTC object + rtc: Rtc, - /// Connection state. - state: State, + /// Connection state. + state: State, - /// Connection ID. - connection_id: ConnectionId, + /// Connection ID. + connection_id: ConnectionId, - /// Noise channel ID. - noise_channel_id: ChannelId, + /// Noise channel ID. + noise_channel_id: ChannelId, - /// Local keypair. - id_keypair: Keypair, + /// Local keypair. + id_keypair: Keypair, - /// Peer address - peer_address: SocketAddr, + /// Peer address + peer_address: SocketAddr, - /// Local address. - local_address: SocketAddr, + /// Local address. + local_address: SocketAddr, } /// Connection state. #[derive(Debug)] enum State { - /// Connection is poisoned. - Poisoned, - - /// Connection is closed. - Closed, - - /// Connection has been opened. - Opened { - /// Noise context. - context: NoiseContext, - }, - - /// Local Noise handshake has been sent to peer and the connection - /// is waiting for an answer. - HandshakeSent { - /// Noise context. - context: NoiseContext, - }, - - /// Response to local Noise handshake has been received and the connection - /// is being validated by `TransportManager`. - Validating { - /// Noise context. - context: NoiseContext, - }, + /// Connection is poisoned. + Poisoned, + + /// Connection is closed. + Closed, + + /// Connection has been opened. + Opened { + /// Noise context. + context: NoiseContext, + }, + + /// Local Noise handshake has been sent to peer and the connection + /// is waiting for an answer. + HandshakeSent { + /// Noise context. + context: NoiseContext, + }, + + /// Response to local Noise handshake has been received and the connection + /// is being validated by `TransportManager`. + Validating { + /// Noise context. + context: NoiseContext, + }, } impl OpeningWebRtcConnection { - /// Create new [`OpeningWebRtcConnection`]. - pub fn new( - rtc: Rtc, - connection_id: ConnectionId, - noise_channel_id: ChannelId, - id_keypair: Keypair, - peer_address: SocketAddr, - local_address: SocketAddr, - ) -> OpeningWebRtcConnection { - tracing::trace!( - target: LOG_TARGET, - ?connection_id, - ?peer_address, - "new connection opened", - ); - - Self { - rtc, - state: State::Closed, - connection_id, - noise_channel_id, - id_keypair, - peer_address, - local_address, - } - } - - /// Get remote fingerprint to bytes. - fn remote_fingerprint(&mut self) -> Vec { - let fingerprint = self - .rtc - .direct_api() - .remote_dtls_fingerprint() - .expect("fingerprint to exist") - .clone(); - Self::fingerprint_to_bytes(&fingerprint) - } - - /// Get local fingerprint as bytes. - fn local_fingerprint(&mut self) -> Vec { - Self::fingerprint_to_bytes(self.rtc.direct_api().local_dtls_fingerprint()) - } - - /// Convert `Fingerprint` to bytes. - fn fingerprint_to_bytes(fingerprint: &Fingerprint) -> Vec { - const MULTIHASH_SHA256_CODE: u64 = 0x12; - Multihash::wrap(MULTIHASH_SHA256_CODE, &fingerprint.bytes) - .expect("fingerprint's len to be 32 bytes") - .to_bytes() - } - - /// Once a Noise data channel has been opened, even though the light client was the dialer, - /// the WebRTC server will act as the dialer as per the specification. - /// - /// Create the first Noise handshake message and send it to remote peer. - fn on_noise_channel_open(&mut self) -> crate::Result<()> { - tracing::trace!(target: LOG_TARGET, "send initial noise handshake"); - - let State::Opened { mut context } = std::mem::replace(&mut self.state, State::Poisoned) - else { - return Err(Error::InvalidState); - }; - - // create first noise handshake and send it to remote peer - let payload = WebRtcMessage::encode(context.first_message(Role::Dialer)?, None); - - self.rtc - .channel(self.noise_channel_id) - .ok_or(Error::ChannelDoesntExist)? - .write(true, payload.as_slice()) - .map_err(Error::WebRtc)?; - - self.state = State::HandshakeSent { context }; - Ok(()) - } - - /// Handle timeout. - pub fn on_timeout(&mut self) -> crate::Result<()> { - if let Err(error) = self.rtc.handle_input(Input::Timeout(Instant::now())) { - tracing::error!( - target: LOG_TARGET, - ?error, - "failed to handle timeout for `Rtc`" - ); - - self.rtc.disconnect(); - return Err(Error::Disconnected); - } - - Ok(()) - } - - /// Handle Noise handshake response. - /// - /// The message contains remote's peer ID which is used by the `TransportManager` to validate - /// the connection. Note the Noise handshake requires one more messages to be sent by the dialer - /// (us) but the inbound connection must first be verified by the `TransportManager` which will - /// either accept or reject the connection. - /// - /// If the peer is accepted, [`OpeningWebRtcConnection::on_accept()`] is called which creates - /// the final Noise message and sends it to the remote peer, concluding the handshake. - fn on_noise_channel_data(&mut self, data: Vec) -> crate::Result { - tracing::trace!(target: LOG_TARGET, "handle noise handshake reply"); - - let State::HandshakeSent { mut context } = - std::mem::replace(&mut self.state, State::Poisoned) - else { - return Err(Error::InvalidState); - }; - - let message = WebRtcMessage::decode(&data)?.payload.ok_or(Error::InvalidData)?; - let remote_peer_id = context.get_remote_peer_id(&message)?; - - tracing::trace!( - target: LOG_TARGET, - ?remote_peer_id, - "remote reply parsed successfully", - ); - - self.state = State::Validating { context }; - - let remote_fingerprint = self - .rtc - .direct_api() - .remote_dtls_fingerprint() - .expect("fingerprint to exist") - .clone() - .bytes; - - const MULTIHASH_SHA256_CODE: u64 = 0x12; - let certificate = Multihash::wrap(MULTIHASH_SHA256_CODE, &remote_fingerprint) - .expect("fingerprint's len to be 32 bytes"); - - let address = Multiaddr::empty() - .with(Protocol::from(self.peer_address.ip())) - .with(Protocol::Udp(self.peer_address.port())) - .with(Protocol::WebRTC) - .with(Protocol::Certhash(certificate)) - .with(Protocol::P2p(remote_peer_id.into())); - - Ok(WebRtcEvent::ConnectionOpened { - peer: remote_peer_id, - endpoint: Endpoint::listener(address, self.connection_id), - }) - } - - /// Accept connection by sending the final Noise handshake message - /// and return the `Rtc` object for further use. - pub fn on_accept(mut self) -> crate::Result { - tracing::trace!(target: LOG_TARGET, "accept webrtc connection"); - - let State::Validating { mut context } = std::mem::replace(&mut self.state, State::Poisoned) - else { - return Err(Error::InvalidState); - }; - - // create second noise handshake message and send it to remote - let payload = WebRtcMessage::encode(context.second_message()?, None); - - let mut channel = - self.rtc.channel(self.noise_channel_id).ok_or(Error::ChannelDoesntExist)?; - - channel.write(true, payload.as_slice()).map_err(Error::WebRtc)?; - self.rtc.direct_api().close_data_channel(self.noise_channel_id); - - Ok(self.rtc) - } - - /// Handle input from peer. - pub fn on_input(&mut self, buffer: DatagramRecv) -> crate::Result<()> { - tracing::trace!( - target: LOG_TARGET, - peer = ?self.peer_address, - "handle input from peer", - ); - - let message = Input::Receive( - Instant::now(), - Receive { - source: self.peer_address, - proto: Str0mProtocol::Udp, - destination: self.local_address, - contents: buffer, - }, - ); - - match self.rtc.accepts(&message) { + /// Create new [`OpeningWebRtcConnection`]. + pub fn new( + rtc: Rtc, + connection_id: ConnectionId, + noise_channel_id: ChannelId, + id_keypair: Keypair, + peer_address: SocketAddr, + local_address: SocketAddr, + ) -> OpeningWebRtcConnection { + tracing::trace!( + target: LOG_TARGET, + ?connection_id, + ?peer_address, + "new connection opened", + ); + + Self { + rtc, + state: State::Closed, + connection_id, + noise_channel_id, + id_keypair, + peer_address, + local_address, + } + } + + /// Get remote fingerprint to bytes. + fn remote_fingerprint(&mut self) -> Vec { + let fingerprint = self + .rtc + .direct_api() + .remote_dtls_fingerprint() + .expect("fingerprint to exist") + .clone(); + Self::fingerprint_to_bytes(&fingerprint) + } + + /// Get local fingerprint as bytes. + fn local_fingerprint(&mut self) -> Vec { + Self::fingerprint_to_bytes(self.rtc.direct_api().local_dtls_fingerprint()) + } + + /// Convert `Fingerprint` to bytes. + fn fingerprint_to_bytes(fingerprint: &Fingerprint) -> Vec { + const MULTIHASH_SHA256_CODE: u64 = 0x12; + Multihash::wrap(MULTIHASH_SHA256_CODE, &fingerprint.bytes) + .expect("fingerprint's len to be 32 bytes") + .to_bytes() + } + + /// Once a Noise data channel has been opened, even though the light client was the dialer, + /// the WebRTC server will act as the dialer as per the specification. + /// + /// Create the first Noise handshake message and send it to remote peer. + fn on_noise_channel_open(&mut self) -> crate::Result<()> { + tracing::trace!(target: LOG_TARGET, "send initial noise handshake"); + + let State::Opened { mut context } = std::mem::replace(&mut self.state, State::Poisoned) + else { + return Err(Error::InvalidState); + }; + + // create first noise handshake and send it to remote peer + let payload = WebRtcMessage::encode(context.first_message(Role::Dialer)?, None); + + self.rtc + .channel(self.noise_channel_id) + .ok_or(Error::ChannelDoesntExist)? + .write(true, payload.as_slice()) + .map_err(Error::WebRtc)?; + + self.state = State::HandshakeSent { context }; + Ok(()) + } + + /// Handle timeout. + pub fn on_timeout(&mut self) -> crate::Result<()> { + if let Err(error) = self.rtc.handle_input(Input::Timeout(Instant::now())) { + tracing::error!( + target: LOG_TARGET, + ?error, + "failed to handle timeout for `Rtc`" + ); + + self.rtc.disconnect(); + return Err(Error::Disconnected); + } + + Ok(()) + } + + /// Handle Noise handshake response. + /// + /// The message contains remote's peer ID which is used by the `TransportManager` to validate + /// the connection. Note the Noise handshake requires one more messages to be sent by the dialer + /// (us) but the inbound connection must first be verified by the `TransportManager` which will + /// either accept or reject the connection. + /// + /// If the peer is accepted, [`OpeningWebRtcConnection::on_accept()`] is called which creates + /// the final Noise message and sends it to the remote peer, concluding the handshake. + fn on_noise_channel_data(&mut self, data: Vec) -> crate::Result { + tracing::trace!(target: LOG_TARGET, "handle noise handshake reply"); + + let State::HandshakeSent { mut context } = + std::mem::replace(&mut self.state, State::Poisoned) + else { + return Err(Error::InvalidState); + }; + + let message = WebRtcMessage::decode(&data)?.payload.ok_or(Error::InvalidData)?; + let remote_peer_id = context.get_remote_peer_id(&message)?; + + tracing::trace!( + target: LOG_TARGET, + ?remote_peer_id, + "remote reply parsed successfully", + ); + + self.state = State::Validating { context }; + + let remote_fingerprint = self + .rtc + .direct_api() + .remote_dtls_fingerprint() + .expect("fingerprint to exist") + .clone() + .bytes; + + const MULTIHASH_SHA256_CODE: u64 = 0x12; + let certificate = Multihash::wrap(MULTIHASH_SHA256_CODE, &remote_fingerprint) + .expect("fingerprint's len to be 32 bytes"); + + let address = Multiaddr::empty() + .with(Protocol::from(self.peer_address.ip())) + .with(Protocol::Udp(self.peer_address.port())) + .with(Protocol::WebRTC) + .with(Protocol::Certhash(certificate)) + .with(Protocol::P2p(remote_peer_id.into())); + + Ok(WebRtcEvent::ConnectionOpened { + peer: remote_peer_id, + endpoint: Endpoint::listener(address, self.connection_id), + }) + } + + /// Accept connection by sending the final Noise handshake message + /// and return the `Rtc` object for further use. + pub fn on_accept(mut self) -> crate::Result { + tracing::trace!(target: LOG_TARGET, "accept webrtc connection"); + + let State::Validating { mut context } = std::mem::replace(&mut self.state, State::Poisoned) + else { + return Err(Error::InvalidState); + }; + + // create second noise handshake message and send it to remote + let payload = WebRtcMessage::encode(context.second_message()?, None); + + let mut channel = + self.rtc.channel(self.noise_channel_id).ok_or(Error::ChannelDoesntExist)?; + + channel.write(true, payload.as_slice()).map_err(Error::WebRtc)?; + self.rtc.direct_api().close_data_channel(self.noise_channel_id); + + Ok(self.rtc) + } + + /// Handle input from peer. + pub fn on_input(&mut self, buffer: DatagramRecv) -> crate::Result<()> { + tracing::trace!( + target: LOG_TARGET, + peer = ?self.peer_address, + "handle input from peer", + ); + + let message = Input::Receive( + Instant::now(), + Receive { + source: self.peer_address, + proto: Str0mProtocol::Udp, + destination: self.local_address, + contents: buffer, + }, + ); + + match self.rtc.accepts(&message) { true => self.rtc.handle_input(message).map_err(|error| { tracing::debug!(target: LOG_TARGET, source = ?self.peer_address, ?error, "failed to handle data"); Error::InputRejected @@ -343,158 +343,158 @@ impl OpeningWebRtcConnection { Err(Error::InputRejected) } } - } - - /// Progress the state of [`OpeningWebRtcConnection`]. - pub fn poll_process(&mut self) -> WebRtcEvent { - if !self.rtc.is_alive() { - tracing::debug!( - target: LOG_TARGET, - "`Rtc` is not alive, closing `WebRtcConnection`" - ); - - return WebRtcEvent::ConnectionClosed; - } - - loop { - let output = match self.rtc.poll_output() { - Ok(output) => output, - Err(error) => { - tracing::debug!( - target: LOG_TARGET, - connection_id = ?self.connection_id, - ?error, - "`WebRtcConnection::poll_process()` failed", - ); - - return WebRtcEvent::ConnectionClosed; - } - }; - - match output { - Output::Transmit(transmit) => { - tracing::trace!( - target: LOG_TARGET, - "transmit data", - ); - - return WebRtcEvent::Transmit { - destination: transmit.destination, - datagram: transmit.contents, - }; - } - Output::Timeout(timeout) => return WebRtcEvent::Timeout { timeout }, - Output::Event(e) => match e { - Event::IceConnectionStateChange(v) => - if v == IceConnectionState::Disconnected { - tracing::trace!(target: LOG_TARGET, "ice connection closed"); - return WebRtcEvent::ConnectionClosed; - }, - Event::ChannelOpen(channel_id, name) => { - tracing::trace!( - target: LOG_TARGET, - connection_id = ?self.connection_id, - ?channel_id, - ?name, - "channel opened", - ); - - if channel_id != self.noise_channel_id { - tracing::warn!( - target: LOG_TARGET, - connection_id = ?self.connection_id, - ?channel_id, - "ignoring opened channel", - ); - continue; - } - - if let Err(error) = self.on_noise_channel_open() { - tracing::debug!( - target: LOG_TARGET, - connection_id = ?self.connection_id, - ?error, - "noise channel open failed", - ); - return WebRtcEvent::ConnectionClosed; - } - } - Event::ChannelData(data) => { - tracing::trace!( - target: LOG_TARGET, - "data received over channel", - ); - - if data.id != self.noise_channel_id { - tracing::warn!( - target: LOG_TARGET, - channel_id = ?data.id, - connection_id = ?self.connection_id, - "ignoring data from channel", - ); - continue; - } - - match self.on_noise_channel_data(data.data) { - Ok(event) => return event, - Err(error) => { - tracing::debug!( - target: LOG_TARGET, - connection_id = ?self.connection_id, - ?error, - "noise channel data handling failed", - ); - return WebRtcEvent::ConnectionClosed; - } - } - } - Event::ChannelClose(channel_id) => { - tracing::debug!(target: LOG_TARGET, ?channel_id, "channel closed"); - } - Event::Connected => match std::mem::replace(&mut self.state, State::Poisoned) { - State::Closed => { - let remote_fingerprint = self.remote_fingerprint(); - let local_fingerprint = self.local_fingerprint(); - - let context = match NoiseContext::with_prologue( - &self.id_keypair, - noise_prologue(local_fingerprint, remote_fingerprint), - ) { - Ok(context) => context, - Err(err) => { - tracing::error!( - target: LOG_TARGET, - peer = ?self.peer_address, - "NoiseContext failed with error {err}", - ); - - return WebRtcEvent::ConnectionClosed; - } - }; - - tracing::debug!( - target: LOG_TARGET, - peer = ?self.peer_address, - "connection opened", - ); - - self.state = State::Opened { context }; - } - state => { - tracing::debug!( - target: LOG_TARGET, - peer = ?self.peer_address, - ?state, - "invalid state for connection" - ); - return WebRtcEvent::ConnectionClosed; - } - }, - event => { - tracing::warn!(target: LOG_TARGET, ?event, "unhandled event"); - } - }, - } - } - } + } + + /// Progress the state of [`OpeningWebRtcConnection`]. + pub fn poll_process(&mut self) -> WebRtcEvent { + if !self.rtc.is_alive() { + tracing::debug!( + target: LOG_TARGET, + "`Rtc` is not alive, closing `WebRtcConnection`" + ); + + return WebRtcEvent::ConnectionClosed; + } + + loop { + let output = match self.rtc.poll_output() { + Ok(output) => output, + Err(error) => { + tracing::debug!( + target: LOG_TARGET, + connection_id = ?self.connection_id, + ?error, + "`WebRtcConnection::poll_process()` failed", + ); + + return WebRtcEvent::ConnectionClosed; + }, + }; + + match output { + Output::Transmit(transmit) => { + tracing::trace!( + target: LOG_TARGET, + "transmit data", + ); + + return WebRtcEvent::Transmit { + destination: transmit.destination, + datagram: transmit.contents, + }; + }, + Output::Timeout(timeout) => return WebRtcEvent::Timeout { timeout }, + Output::Event(e) => match e { + Event::IceConnectionStateChange(v) => + if v == IceConnectionState::Disconnected { + tracing::trace!(target: LOG_TARGET, "ice connection closed"); + return WebRtcEvent::ConnectionClosed; + }, + Event::ChannelOpen(channel_id, name) => { + tracing::trace!( + target: LOG_TARGET, + connection_id = ?self.connection_id, + ?channel_id, + ?name, + "channel opened", + ); + + if channel_id != self.noise_channel_id { + tracing::warn!( + target: LOG_TARGET, + connection_id = ?self.connection_id, + ?channel_id, + "ignoring opened channel", + ); + continue; + } + + if let Err(error) = self.on_noise_channel_open() { + tracing::debug!( + target: LOG_TARGET, + connection_id = ?self.connection_id, + ?error, + "noise channel open failed", + ); + return WebRtcEvent::ConnectionClosed; + } + }, + Event::ChannelData(data) => { + tracing::trace!( + target: LOG_TARGET, + "data received over channel", + ); + + if data.id != self.noise_channel_id { + tracing::warn!( + target: LOG_TARGET, + channel_id = ?data.id, + connection_id = ?self.connection_id, + "ignoring data from channel", + ); + continue; + } + + match self.on_noise_channel_data(data.data) { + Ok(event) => return event, + Err(error) => { + tracing::debug!( + target: LOG_TARGET, + connection_id = ?self.connection_id, + ?error, + "noise channel data handling failed", + ); + return WebRtcEvent::ConnectionClosed; + }, + } + }, + Event::ChannelClose(channel_id) => { + tracing::debug!(target: LOG_TARGET, ?channel_id, "channel closed"); + }, + Event::Connected => match std::mem::replace(&mut self.state, State::Poisoned) { + State::Closed => { + let remote_fingerprint = self.remote_fingerprint(); + let local_fingerprint = self.local_fingerprint(); + + let context = match NoiseContext::with_prologue( + &self.id_keypair, + noise_prologue(local_fingerprint, remote_fingerprint), + ) { + Ok(context) => context, + Err(err) => { + tracing::error!( + target: LOG_TARGET, + peer = ?self.peer_address, + "NoiseContext failed with error {err}", + ); + + return WebRtcEvent::ConnectionClosed; + }, + }; + + tracing::debug!( + target: LOG_TARGET, + peer = ?self.peer_address, + "connection opened", + ); + + self.state = State::Opened { context }; + }, + state => { + tracing::debug!( + target: LOG_TARGET, + peer = ?self.peer_address, + ?state, + "invalid state for connection" + ); + return WebRtcEvent::ConnectionClosed; + }, + }, + event => { + tracing::warn!(target: LOG_TARGET, ?event, "unhandled event"); + }, + }, + } + } + } } diff --git a/client/litep2p/src/transport/webrtc/substream.rs b/client/litep2p/src/transport/webrtc/substream.rs index cf35a178..260eeb21 100644 --- a/client/litep2p/src/transport/webrtc/substream.rs +++ b/client/litep2p/src/transport/webrtc/substream.rs @@ -19,8 +19,8 @@ // DEALINGS IN THE SOFTWARE. use crate::{ - transport::webrtc::{schema::webrtc::message::Flag, util::WebRtcMessage}, - Error, + transport::webrtc::{schema::webrtc::message::Flag, util::WebRtcMessage}, + Error, }; use bytes::{Buf, BufMut, BytesMut}; @@ -30,10 +30,10 @@ use tokio::sync::mpsc::{channel, Receiver, Sender}; use tokio_util::sync::PollSender; use std::{ - pin::Pin, - sync::Arc, - task::{Context, Poll}, - time::Duration, + pin::Pin, + sync::Arc, + task::{Context, Poll}, + time::Duration, }; /// Maximum frame size. @@ -46,1465 +46,1317 @@ const FIN_ACK_TIMEOUT: Duration = Duration::from_secs(5); /// Substream event. #[derive(Debug, PartialEq, Eq)] pub enum Event { - /// Receiver closed. - RecvClosed, - - /// Send/receive message with optional flag. - Message { - payload: Vec, - flag: Option, - }, + /// Receiver closed. + RecvClosed, + + /// Send/receive message with optional flag. + Message { payload: Vec, flag: Option }, } /// Substream stream. #[derive(Debug, Clone, Copy)] enum State { - /// Substream is fully open. - Open, + /// Substream is fully open. + Open, - /// Remote is no longer interested in receiving anything. - SendClosed, + /// Remote is no longer interested in receiving anything. + SendClosed, - /// Shutdown initiated, flushing pending data before sending FIN. - Closing, + /// Shutdown initiated, flushing pending data before sending FIN. + Closing, - /// We sent FIN, waiting for FIN_ACK. - FinSent, + /// We sent FIN, waiting for FIN_ACK. + FinSent, - /// We received FIN_ACK, write half is closed. - FinAcked, + /// We received FIN_ACK, write half is closed. + FinAcked, } /// Channel-backed substream. Must be owned and polled by exactly one task at a time. pub struct Substream { - /// Substream state. - state: Arc>, + /// Substream state. + state: Arc>, - /// Read buffer. - read_buffer: BytesMut, + /// Read buffer. + read_buffer: BytesMut, - /// TX channel for sending messages to `peer`, wrapped in a [`PollSender`] - /// so that backpressure is driven by the caller's waker. - tx: PollSender, + /// TX channel for sending messages to `peer`, wrapped in a [`PollSender`] + /// so that backpressure is driven by the caller's waker. + tx: PollSender, - /// RX channel for receiving messages from `peer`. - rx: Receiver, + /// RX channel for receiving messages from `peer`. + rx: Receiver, - /// Waker to notify when shutdown completes (FIN_ACK received). - shutdown_waker: Arc, + /// Waker to notify when shutdown completes (FIN_ACK received). + shutdown_waker: Arc, - /// Waker to notify when write state changes (e.g., STOP_SENDING received). - write_waker: Arc, + /// Waker to notify when write state changes (e.g., STOP_SENDING received). + write_waker: Arc, - /// Timeout for waiting on FIN_ACK after sending FIN. - /// Boxed to maintain Unpin for Substream while allowing the Sleep to be polled. - fin_ack_timeout: Option>>, + /// Timeout for waiting on FIN_ACK after sending FIN. + /// Boxed to maintain Unpin for Substream while allowing the Sleep to be polled. + fin_ack_timeout: Option>>, } impl Substream { - /// Create new [`Substream`]. - pub fn new() -> (Self, SubstreamHandle) { - let (outbound_tx, outbound_rx) = channel(256); - let (inbound_tx, inbound_rx) = channel(256); - let state = Arc::new(Mutex::new(State::Open)); - let shutdown_waker = Arc::new(AtomicWaker::new()); - let write_waker = Arc::new(AtomicWaker::new()); - - let handle = SubstreamHandle { - inbound_tx, - outbound_tx: outbound_tx.clone(), - rx: outbound_rx, - state: Arc::clone(&state), - shutdown_waker: Arc::clone(&shutdown_waker), - write_waker: Arc::clone(&write_waker), - read_closed: std::sync::atomic::AtomicBool::new(false), - }; - - ( - Self { - state, - tx: PollSender::new(outbound_tx), - rx: inbound_rx, - read_buffer: BytesMut::new(), - shutdown_waker, - write_waker, - fin_ack_timeout: None, - }, - handle, - ) - } + /// Create new [`Substream`]. + pub fn new() -> (Self, SubstreamHandle) { + let (outbound_tx, outbound_rx) = channel(256); + let (inbound_tx, inbound_rx) = channel(256); + let state = Arc::new(Mutex::new(State::Open)); + let shutdown_waker = Arc::new(AtomicWaker::new()); + let write_waker = Arc::new(AtomicWaker::new()); + + let handle = SubstreamHandle { + inbound_tx, + outbound_tx: outbound_tx.clone(), + rx: outbound_rx, + state: Arc::clone(&state), + shutdown_waker: Arc::clone(&shutdown_waker), + write_waker: Arc::clone(&write_waker), + read_closed: std::sync::atomic::AtomicBool::new(false), + }; + + ( + Self { + state, + tx: PollSender::new(outbound_tx), + rx: inbound_rx, + read_buffer: BytesMut::new(), + shutdown_waker, + write_waker, + fin_ack_timeout: None, + }, + handle, + ) + } } /// Substream handle that is given to the WebRTC transport backend. pub struct SubstreamHandle { - state: Arc>, + state: Arc>, - /// TX channel for sending inbound messages from `peer` to the associated `Substream`. - inbound_tx: Sender, + /// TX channel for sending inbound messages from `peer` to the associated `Substream`. + inbound_tx: Sender, - /// TX channel for sending outbound messages to `peer` (e.g., FIN_ACK responses). - outbound_tx: Sender, + /// TX channel for sending outbound messages to `peer` (e.g., FIN_ACK responses). + outbound_tx: Sender, - /// RX channel for receiving outbound messages to `peer` from the associated `Substream`. - rx: Receiver, + /// RX channel for receiving outbound messages to `peer` from the associated `Substream`. + rx: Receiver, - /// Waker to notify when shutdown completes (FIN_ACK received). - shutdown_waker: Arc, + /// Waker to notify when shutdown completes (FIN_ACK received). + shutdown_waker: Arc, - /// Waker to notify when write state changes (e.g., STOP_SENDING received). - write_waker: Arc, + /// Waker to notify when write state changes (e.g., STOP_SENDING received). + write_waker: Arc, - /// Whether we've already sent RecvClosed to the inbound channel. - /// Prevents duplicate RecvClosed events if multiple FIN messages are received. - read_closed: std::sync::atomic::AtomicBool, + /// Whether we've already sent RecvClosed to the inbound channel. + /// Prevents duplicate RecvClosed events if multiple FIN messages are received. + read_closed: std::sync::atomic::AtomicBool, } impl SubstreamHandle { - /// Handle message received from a remote peer. - /// - /// Process an incoming WebRTC message, handling any payload and flags. - /// - /// Payload is processed first (if present), then flags are handled. This ensures that - /// a FIN message containing final data will deliver that data before signaling closure. - pub async fn on_message(&self, message: WebRtcMessage) -> crate::Result<()> { - // Process payload first, before handling flags. - // This ensures that if a FIN message contains data, we deliver it before closing. - if let Some(payload) = message.payload { - if !payload.is_empty() { - self.inbound_tx - .send(Event::Message { - payload, - flag: None, - }) - .await?; - } - } - - // Now handle flags - if let Some(flag) = message.flag { - match flag { - Flag::Fin => { - // Guard against duplicate FIN messages - only send RecvClosed once - if self.read_closed.swap(true, std::sync::atomic::Ordering::SeqCst) { - // Already processed FIN, ignore duplicate - tracing::debug!( - target: "litep2p::webrtc::substream", - "received duplicate FIN, ignoring" - ); - return Ok(()); - } - - // Received FIN from remote, close our read half - self.inbound_tx.send(Event::RecvClosed).await?; - - // Send FIN_ACK back to remote using try_send to avoid blocking. - // If the channel is full, the remote will timeout waiting for FIN_ACK - // and handle it gracefully. This prevents deadlock if the outbound - // channel is blocked due to backpressure. - if let Err(e) = self.outbound_tx.try_send(Event::Message { - payload: vec![], - flag: Some(Flag::FinAck), - }) { - tracing::warn!( - target: "litep2p::webrtc::substream", - ?e, - "failed to send FIN_ACK, remote will timeout" - ); - } - return Ok(()); - } - Flag::FinAck => { - // Received FIN_ACK, we can now fully close our write half - let mut state = self.state.lock(); - if matches!(*state, State::FinSent) { - *state = State::FinAcked; - // Wake up any task waiting on shutdown - self.shutdown_waker.wake(); - } else { - tracing::warn!( - target: "litep2p::webrtc::substream", - ?state, - "received FIN_ACK in unexpected state, ignoring" - ); - } - return Ok(()); - } - Flag::StopSending => { - *self.state.lock() = State::SendClosed; - // Wake any blocked poll_write so it can see the state change - self.write_waker.wake(); - return Ok(()); - } - Flag::ResetStream => { - // RESET_STREAM abruptly terminates both sides of the stream - // (matching go-libp2p behavior) - // Close the read side - let _ = self.inbound_tx.try_send(Event::RecvClosed); - // Close the write side - *self.state.lock() = State::SendClosed; - // Wake any blocked poll_write so it can see the state change - self.write_waker.wake(); - return Err(Error::ConnectionClosed); - } - } - } - - Ok(()) - } + /// Handle message received from a remote peer. + /// + /// Process an incoming WebRTC message, handling any payload and flags. + /// + /// Payload is processed first (if present), then flags are handled. This ensures that + /// a FIN message containing final data will deliver that data before signaling closure. + pub async fn on_message(&self, message: WebRtcMessage) -> crate::Result<()> { + // Process payload first, before handling flags. + // This ensures that if a FIN message contains data, we deliver it before closing. + if let Some(payload) = message.payload { + if !payload.is_empty() { + self.inbound_tx.send(Event::Message { payload, flag: None }).await?; + } + } + + // Now handle flags + if let Some(flag) = message.flag { + match flag { + Flag::Fin => { + // Guard against duplicate FIN messages - only send RecvClosed once + if self.read_closed.swap(true, std::sync::atomic::Ordering::SeqCst) { + // Already processed FIN, ignore duplicate + tracing::debug!( + target: "litep2p::webrtc::substream", + "received duplicate FIN, ignoring" + ); + return Ok(()); + } + + // Received FIN from remote, close our read half + self.inbound_tx.send(Event::RecvClosed).await?; + + // Send FIN_ACK back to remote using try_send to avoid blocking. + // If the channel is full, the remote will timeout waiting for FIN_ACK + // and handle it gracefully. This prevents deadlock if the outbound + // channel is blocked due to backpressure. + if let Err(e) = self + .outbound_tx + .try_send(Event::Message { payload: vec![], flag: Some(Flag::FinAck) }) + { + tracing::warn!( + target: "litep2p::webrtc::substream", + ?e, + "failed to send FIN_ACK, remote will timeout" + ); + } + return Ok(()); + }, + Flag::FinAck => { + // Received FIN_ACK, we can now fully close our write half + let mut state = self.state.lock(); + if matches!(*state, State::FinSent) { + *state = State::FinAcked; + // Wake up any task waiting on shutdown + self.shutdown_waker.wake(); + } else { + tracing::warn!( + target: "litep2p::webrtc::substream", + ?state, + "received FIN_ACK in unexpected state, ignoring" + ); + } + return Ok(()); + }, + Flag::StopSending => { + *self.state.lock() = State::SendClosed; + // Wake any blocked poll_write so it can see the state change + self.write_waker.wake(); + return Ok(()); + }, + Flag::ResetStream => { + // RESET_STREAM abruptly terminates both sides of the stream + // (matching go-libp2p behavior) + // Close the read side + let _ = self.inbound_tx.try_send(Event::RecvClosed); + // Close the write side + *self.state.lock() = State::SendClosed; + // Wake any blocked poll_write so it can see the state change + self.write_waker.wake(); + return Err(Error::ConnectionClosed); + }, + } + } + + Ok(()) + } } impl Stream for SubstreamHandle { - type Item = Event; - - fn poll_next(mut self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll> { - // First, try to drain any pending outbound messages - match self.rx.poll_recv(cx) { - Poll::Ready(Some(event)) => return Poll::Ready(Some(event)), - Poll::Ready(None) => { - // Outbound channel closed (all senders dropped) - return Poll::Ready(None); - } - Poll::Pending => { - // No messages available, check if we should signal closure - } - } - - // Check if Substream has been dropped (inbound channel closed) - // When Substream is dropped, there will be no more outbound messages - // Since we've already tried to recv above and got Pending, we know the queue is empty - // Therefore, it's safe to signal closure - if self.inbound_tx.is_closed() { - return Poll::Ready(None); - } - - Poll::Pending - } + type Item = Event; + + fn poll_next(mut self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll> { + // First, try to drain any pending outbound messages + match self.rx.poll_recv(cx) { + Poll::Ready(Some(event)) => return Poll::Ready(Some(event)), + Poll::Ready(None) => { + // Outbound channel closed (all senders dropped) + return Poll::Ready(None); + }, + Poll::Pending => { + // No messages available, check if we should signal closure + }, + } + + // Check if Substream has been dropped (inbound channel closed) + // When Substream is dropped, there will be no more outbound messages + // Since we've already tried to recv above and got Pending, we know the queue is empty + // Therefore, it's safe to signal closure + if self.inbound_tx.is_closed() { + return Poll::Ready(None); + } + + Poll::Pending + } } impl tokio::io::AsyncRead for Substream { - fn poll_read( - mut self: Pin<&mut Self>, - cx: &mut Context<'_>, - buf: &mut tokio::io::ReadBuf<'_>, - ) -> Poll> { - // if there are any remaining bytes from a previous read, consume them first - if self.read_buffer.remaining() > 0 { - let num_bytes = std::cmp::min(self.read_buffer.remaining(), buf.remaining()); - - buf.put_slice(&self.read_buffer[..num_bytes]); - self.read_buffer.advance(num_bytes); - - // TODO: optimize by trying to read more data from substream and not exiting early - return Poll::Ready(Ok(())); - } - - match futures::ready!(self.rx.poll_recv(cx)) { - None | Some(Event::RecvClosed) => - Poll::Ready(Err(std::io::ErrorKind::BrokenPipe.into())), - Some(Event::Message { payload, flag: _ }) => { - if payload.len() > MAX_FRAME_SIZE { - return Poll::Ready(Err(std::io::ErrorKind::PermissionDenied.into())); - } - - match buf.remaining() >= payload.len() { - true => buf.put_slice(&payload), - false => { - let remaining = buf.remaining(); - buf.put_slice(&payload[..remaining]); - self.read_buffer.put_slice(&payload[remaining..]); - } - } - - Poll::Ready(Ok(())) - } - } - } + fn poll_read( + mut self: Pin<&mut Self>, + cx: &mut Context<'_>, + buf: &mut tokio::io::ReadBuf<'_>, + ) -> Poll> { + // if there are any remaining bytes from a previous read, consume them first + if self.read_buffer.remaining() > 0 { + let num_bytes = std::cmp::min(self.read_buffer.remaining(), buf.remaining()); + + buf.put_slice(&self.read_buffer[..num_bytes]); + self.read_buffer.advance(num_bytes); + + // TODO: optimize by trying to read more data from substream and not exiting early + return Poll::Ready(Ok(())); + } + + match futures::ready!(self.rx.poll_recv(cx)) { + None | Some(Event::RecvClosed) => + Poll::Ready(Err(std::io::ErrorKind::BrokenPipe.into())), + Some(Event::Message { payload, flag: _ }) => { + if payload.len() > MAX_FRAME_SIZE { + return Poll::Ready(Err(std::io::ErrorKind::PermissionDenied.into())); + } + + match buf.remaining() >= payload.len() { + true => buf.put_slice(&payload), + false => { + let remaining = buf.remaining(); + buf.put_slice(&payload[..remaining]); + self.read_buffer.put_slice(&payload[remaining..]); + }, + } + + Poll::Ready(Ok(())) + }, + } + } } impl tokio::io::AsyncWrite for Substream { - fn poll_write( - mut self: Pin<&mut Self>, - cx: &mut Context<'_>, - buf: &[u8], - ) -> Poll> { - // Register waker so we get notified on state changes (e.g., STOP_SENDING) - self.write_waker.register(cx.waker()); - - // Reject writes if we're closing or closed - match *self.state.lock() { - State::SendClosed | State::Closing | State::FinSent | State::FinAcked => { - return Poll::Ready(Err(std::io::ErrorKind::BrokenPipe.into())); - } - State::Open => {} - } - - match futures::ready!(self.tx.poll_reserve(cx)) { - Ok(()) => {} - Err(_) => return Poll::Ready(Err(std::io::ErrorKind::BrokenPipe.into())), - }; - - // Re-check state after poll_reserve - it may have changed while we were waiting - match *self.state.lock() { - State::SendClosed | State::Closing | State::FinSent | State::FinAcked => { - return Poll::Ready(Err(std::io::ErrorKind::BrokenPipe.into())); - } - State::Open => {} - } - - let num_bytes = std::cmp::min(MAX_FRAME_SIZE, buf.len()); - let frame = buf[..num_bytes].to_vec(); - - match self.tx.send_item(Event::Message { - payload: frame, - flag: None, - }) { - Ok(()) => Poll::Ready(Ok(num_bytes)), - Err(_) => Poll::Ready(Err(std::io::ErrorKind::BrokenPipe.into())), - } - } - - fn poll_flush(self: Pin<&mut Self>, _cx: &mut Context<'_>) -> Poll> { - Poll::Ready(Ok(())) - } - - fn poll_shutdown( - mut self: Pin<&mut Self>, - cx: &mut Context<'_>, - ) -> Poll> { - // State machine for proper shutdown: - // 1. Transition to Closing (stops accepting new writes) - // 2. Flush pending data - // 3. Send FIN flag - // 4. Transition to FinSent - // 5. Wait for FIN_ACK - // 6. Transition to FinAcked and complete - - let current_state = *self.state.lock(); - - match current_state { - // Already received FIN_ACK, shutdown complete - State::FinAcked => return Poll::Ready(Ok(())), - - // Sent FIN, waiting for FIN_ACK - poll timeout and return Pending - State::FinSent => { - // Register waker FIRST to avoid race condition with on_message - self.shutdown_waker.register(cx.waker()); - - // Re-check state after waker registration in case FIN_ACK arrived - // between the initial state check and waker registration - if matches!(*self.state.lock(), State::FinAcked) { - return Poll::Ready(Ok(())); - } - - // Poll the timeout - if it fires, force shutdown completion - if let Some(timeout) = self.fin_ack_timeout.as_mut() { - if timeout.as_mut().poll(cx).is_ready() { - tracing::debug!( - target: "litep2p::webrtc::substream", - "FIN_ACK timeout exceeded, forcing shutdown completion" - ); - *self.state.lock() = State::FinAcked; - return Poll::Ready(Ok(())); - } - } - - return Poll::Pending; - } - - // First call to shutdown - transition to Closing - State::Open => { - *self.state.lock() = State::Closing; - } - - State::Closing => { - // Already in closing state, continue with shutdown process. - // Guard against duplicate FIN sends: if timeout is already set, we've - // already sent FIN and are waiting for FIN_ACK. This shouldn't happen - // with correct AsyncWrite usage (&mut self), but provides defense in depth. - if self.fin_ack_timeout.is_some() { - self.shutdown_waker.register(cx.waker()); - return Poll::Pending; - } - } - - State::SendClosed => { - // Remote closed send, we can still send FIN - } - } - - // Flush any pending data - // Note: Currently poll_flush is a no-op, but the channel backpressure - // provides implicit flushing since we wait for poll_reserve below - futures::ready!(self.as_mut().poll_flush(cx))?; - - // Reserve space to send FIN - match futures::ready!(self.tx.poll_reserve(cx)) { - Ok(()) => {} - Err(_) => return Poll::Ready(Err(std::io::ErrorKind::BrokenPipe.into())), - }; - - // Send message with FIN flag - match self.tx.send_item(Event::Message { - payload: vec![], - flag: Some(Flag::Fin), - }) { - Ok(()) => { - // Race condition mitigation strategy: - // 1. Transition to FinSent FIRST so on_message can recognize FIN_ACK (if waker - // registered first, FIN_ACK would be ignored since state != FinSent) - // 2. Register waker so we'll be notified on future FIN_ACK arrivals - // 3. Re-check state to catch FIN_ACK that arrived between steps 1 and 2 (wake() - // called before waker registered has no effect, but state changed) - *self.state.lock() = State::FinSent; - self.shutdown_waker.register(cx.waker()); - if matches!(*self.state.lock(), State::FinAcked) { - return Poll::Ready(Ok(())); - } - - // Initialize the timeout for FIN_ACK - let mut timeout = Box::pin(tokio::time::sleep(FIN_ACK_TIMEOUT)); - // Poll the timeout once to register it with tokio's timer - // This ensures we'll be woken when it expires - let _ = timeout.as_mut().poll(cx); - self.fin_ack_timeout = Some(timeout); - - Poll::Pending - } - Err(_) => Poll::Ready(Err(std::io::ErrorKind::BrokenPipe.into())), - } - } + fn poll_write( + mut self: Pin<&mut Self>, + cx: &mut Context<'_>, + buf: &[u8], + ) -> Poll> { + // Register waker so we get notified on state changes (e.g., STOP_SENDING) + self.write_waker.register(cx.waker()); + + // Reject writes if we're closing or closed + match *self.state.lock() { + State::SendClosed | State::Closing | State::FinSent | State::FinAcked => { + return Poll::Ready(Err(std::io::ErrorKind::BrokenPipe.into())); + }, + State::Open => {}, + } + + match futures::ready!(self.tx.poll_reserve(cx)) { + Ok(()) => {}, + Err(_) => return Poll::Ready(Err(std::io::ErrorKind::BrokenPipe.into())), + }; + + // Re-check state after poll_reserve - it may have changed while we were waiting + match *self.state.lock() { + State::SendClosed | State::Closing | State::FinSent | State::FinAcked => { + return Poll::Ready(Err(std::io::ErrorKind::BrokenPipe.into())); + }, + State::Open => {}, + } + + let num_bytes = std::cmp::min(MAX_FRAME_SIZE, buf.len()); + let frame = buf[..num_bytes].to_vec(); + + match self.tx.send_item(Event::Message { payload: frame, flag: None }) { + Ok(()) => Poll::Ready(Ok(num_bytes)), + Err(_) => Poll::Ready(Err(std::io::ErrorKind::BrokenPipe.into())), + } + } + + fn poll_flush(self: Pin<&mut Self>, _cx: &mut Context<'_>) -> Poll> { + Poll::Ready(Ok(())) + } + + fn poll_shutdown( + mut self: Pin<&mut Self>, + cx: &mut Context<'_>, + ) -> Poll> { + // State machine for proper shutdown: + // 1. Transition to Closing (stops accepting new writes) + // 2. Flush pending data + // 3. Send FIN flag + // 4. Transition to FinSent + // 5. Wait for FIN_ACK + // 6. Transition to FinAcked and complete + + let current_state = *self.state.lock(); + + match current_state { + // Already received FIN_ACK, shutdown complete + State::FinAcked => return Poll::Ready(Ok(())), + + // Sent FIN, waiting for FIN_ACK - poll timeout and return Pending + State::FinSent => { + // Register waker FIRST to avoid race condition with on_message + self.shutdown_waker.register(cx.waker()); + + // Re-check state after waker registration in case FIN_ACK arrived + // between the initial state check and waker registration + if matches!(*self.state.lock(), State::FinAcked) { + return Poll::Ready(Ok(())); + } + + // Poll the timeout - if it fires, force shutdown completion + if let Some(timeout) = self.fin_ack_timeout.as_mut() { + if timeout.as_mut().poll(cx).is_ready() { + tracing::debug!( + target: "litep2p::webrtc::substream", + "FIN_ACK timeout exceeded, forcing shutdown completion" + ); + *self.state.lock() = State::FinAcked; + return Poll::Ready(Ok(())); + } + } + + return Poll::Pending; + }, + + // First call to shutdown - transition to Closing + State::Open => { + *self.state.lock() = State::Closing; + }, + + State::Closing => { + // Already in closing state, continue with shutdown process. + // Guard against duplicate FIN sends: if timeout is already set, we've + // already sent FIN and are waiting for FIN_ACK. This shouldn't happen + // with correct AsyncWrite usage (&mut self), but provides defense in depth. + if self.fin_ack_timeout.is_some() { + self.shutdown_waker.register(cx.waker()); + return Poll::Pending; + } + }, + + State::SendClosed => { + // Remote closed send, we can still send FIN + }, + } + + // Flush any pending data + // Note: Currently poll_flush is a no-op, but the channel backpressure + // provides implicit flushing since we wait for poll_reserve below + futures::ready!(self.as_mut().poll_flush(cx))?; + + // Reserve space to send FIN + match futures::ready!(self.tx.poll_reserve(cx)) { + Ok(()) => {}, + Err(_) => return Poll::Ready(Err(std::io::ErrorKind::BrokenPipe.into())), + }; + + // Send message with FIN flag + match self.tx.send_item(Event::Message { payload: vec![], flag: Some(Flag::Fin) }) { + Ok(()) => { + // Race condition mitigation strategy: + // 1. Transition to FinSent FIRST so on_message can recognize FIN_ACK (if waker + // registered first, FIN_ACK would be ignored since state != FinSent) + // 2. Register waker so we'll be notified on future FIN_ACK arrivals + // 3. Re-check state to catch FIN_ACK that arrived between steps 1 and 2 (wake() + // called before waker registered has no effect, but state changed) + *self.state.lock() = State::FinSent; + self.shutdown_waker.register(cx.waker()); + if matches!(*self.state.lock(), State::FinAcked) { + return Poll::Ready(Ok(())); + } + + // Initialize the timeout for FIN_ACK + let mut timeout = Box::pin(tokio::time::sleep(FIN_ACK_TIMEOUT)); + // Poll the timeout once to register it with tokio's timer + // This ensures we'll be woken when it expires + let _ = timeout.as_mut().poll(cx); + self.fin_ack_timeout = Some(timeout); + + Poll::Pending + }, + Err(_) => Poll::Ready(Err(std::io::ErrorKind::BrokenPipe.into())), + } + } } #[cfg(test)] mod tests { - use super::*; - use futures::StreamExt; - use tokio::io::{AsyncRead, AsyncReadExt, AsyncWrite, AsyncWriteExt, ReadBuf}; - - #[tokio::test] - async fn write_small_frame() { - let (mut substream, mut handle) = Substream::new(); - - substream.write_all(&vec![0u8; 1337]).await.unwrap(); - - assert_eq!( - handle.next().await, - Some(Event::Message { - payload: vec![0u8; 1337], - flag: None - }) - ); - - futures::future::poll_fn(|cx| match handle.poll_next_unpin(cx) { - Poll::Pending => Poll::Ready(()), - Poll::Ready(_) => panic!("invalid event"), - }) - .await; - } - - #[tokio::test] - async fn write_large_frame() { - let (mut substream, mut handle) = Substream::new(); - - substream.write_all(&vec![0u8; (2 * MAX_FRAME_SIZE) + 1]).await.unwrap(); - - assert_eq!( - handle.rx.recv().await, - Some(Event::Message { - payload: vec![0u8; MAX_FRAME_SIZE], - flag: None, - }) - ); - assert_eq!( - handle.rx.recv().await, - Some(Event::Message { - payload: vec![0u8; MAX_FRAME_SIZE], - flag: None, - }) - ); - assert_eq!( - handle.rx.recv().await, - Some(Event::Message { - payload: vec![0u8; 1], - flag: None, - }) - ); - - futures::future::poll_fn(|cx| match handle.poll_next_unpin(cx) { - Poll::Pending => Poll::Ready(()), - Poll::Ready(_) => panic!("invalid event"), - }) - .await; - } - - #[tokio::test] - async fn try_to_write_to_closed_substream() { - let (mut substream, handle) = Substream::new(); - *handle.state.lock() = State::SendClosed; - - match substream.write_all(&vec![0u8; 1337]).await { - Err(error) => assert_eq!(error.kind(), std::io::ErrorKind::BrokenPipe), - _ => panic!("invalid event"), - } - } - - #[tokio::test] - async fn substream_shutdown() { - let (mut substream, mut handle) = Substream::new(); - - substream.write_all(&vec![1u8; 1337]).await.unwrap(); - - // Spawn shutdown since it waits for FIN_ACK - let shutdown_task = tokio::spawn(async move { - substream.shutdown().await.unwrap(); - }); - - assert_eq!( - handle.next().await, - Some(Event::Message { - payload: vec![1u8; 1337], - flag: None, - }) - ); - // After shutdown, should send FIN flag - assert_eq!( - handle.next().await, - Some(Event::Message { - payload: vec![], - flag: Some(Flag::Fin) - }) - ); - - // Send FIN_ACK to complete shutdown - handle - .on_message(WebRtcMessage { - payload: None, - flag: Some(Flag::FinAck), - }) - .await - .unwrap(); - - shutdown_task.await.unwrap(); - } - - #[tokio::test] - async fn try_to_read_from_closed_substream() { - let (mut substream, handle) = Substream::new(); - handle - .on_message(WebRtcMessage { - payload: None, - flag: Some(Flag::Fin), - }) - .await - .unwrap(); - - match substream.read(&mut vec![0u8; 256]).await { - Err(error) => assert_eq!(error.kind(), std::io::ErrorKind::BrokenPipe), - _ => panic!("invalid event"), - } - } - - #[tokio::test] - async fn read_small_frame() { - let (mut substream, handle) = Substream::new(); - handle - .inbound_tx - .send(Event::Message { - payload: vec![1u8; 256], - flag: None, - }) - .await - .unwrap(); - - let mut buf = vec![0u8; 2048]; - - match substream.read(&mut buf).await { - Ok(nread) => { - assert_eq!(nread, 256); - assert_eq!(buf[..nread], vec![1u8; 256]); - } - Err(error) => panic!("invalid event: {error:?}"), - } - - let mut read_buf = ReadBuf::new(&mut buf); - futures::future::poll_fn(|cx| { - match Pin::new(&mut substream).poll_read(cx, &mut read_buf) { - Poll::Pending => Poll::Ready(()), - _ => panic!("invalid event"), - } - }) - .await; - } - - #[tokio::test] - async fn read_small_frame_in_two_reads() { - let (mut substream, handle) = Substream::new(); - let mut first = vec![1u8; 256]; - first.extend_from_slice(&vec![2u8; 256]); - - handle - .inbound_tx - .send(Event::Message { - payload: first, - flag: None, - }) - .await - .unwrap(); - - let mut buf = vec![0u8; 256]; - - match substream.read(&mut buf).await { - Ok(nread) => { - assert_eq!(nread, 256); - assert_eq!(buf[..nread], vec![1u8; 256]); - } - Err(error) => panic!("invalid event: {error:?}"), - } - - match substream.read(&mut buf).await { - Ok(nread) => { - assert_eq!(nread, 256); - assert_eq!(buf[..nread], vec![2u8; 256]); - } - Err(error) => panic!("invalid event: {error:?}"), - } - - let mut read_buf = ReadBuf::new(&mut buf); - futures::future::poll_fn(|cx| { - match Pin::new(&mut substream).poll_read(cx, &mut read_buf) { - Poll::Pending => Poll::Ready(()), - _ => panic!("invalid event"), - } - }) - .await; - } - - #[tokio::test] - async fn read_frames() { - let (mut substream, handle) = Substream::new(); - let mut first = vec![1u8; 256]; - first.extend_from_slice(&vec![2u8; 256]); - - handle - .inbound_tx - .send(Event::Message { - payload: first, - flag: None, - }) - .await - .unwrap(); - handle - .inbound_tx - .send(Event::Message { - payload: vec![4u8; 2048], - flag: None, - }) - .await - .unwrap(); - - let mut buf = vec![0u8; 256]; - - match substream.read(&mut buf).await { - Ok(nread) => { - assert_eq!(nread, 256); - assert_eq!(buf[..nread], vec![1u8; 256]); - } - Err(error) => panic!("invalid event: {error:?}"), - } - - let mut buf = vec![0u8; 128]; - - match substream.read(&mut buf).await { - Ok(nread) => { - assert_eq!(nread, 128); - assert_eq!(buf[..nread], vec![2u8; 128]); - } - Err(error) => panic!("invalid event: {error:?}"), - } - - let mut buf = vec![0u8; 128]; - - match substream.read(&mut buf).await { - Ok(nread) => { - assert_eq!(nread, 128); - assert_eq!(buf[..nread], vec![2u8; 128]); - } - Err(error) => panic!("invalid event: {error:?}"), - } - - let mut buf = vec![0u8; MAX_FRAME_SIZE]; - - match substream.read(&mut buf).await { - Ok(nread) => { - assert_eq!(nread, 2048); - assert_eq!(buf[..nread], vec![4u8; 2048]); - } - Err(error) => panic!("invalid event: {error:?}"), - } - - let mut read_buf = ReadBuf::new(&mut buf); - futures::future::poll_fn(|cx| { - match Pin::new(&mut substream).poll_read(cx, &mut read_buf) { - Poll::Pending => Poll::Ready(()), - _ => panic!("invalid event"), - } - }) - .await; - } - - #[tokio::test] - async fn backpressure_works() { - let (mut substream, _handle) = Substream::new(); - - // use all available bandwidth which by default is `256 * MAX_FRAME_SIZE`, - for _ in 0..128 { - substream.write_all(&vec![0u8; 2 * MAX_FRAME_SIZE]).await.unwrap(); - } - - // try to write one more byte but since all available bandwidth - // is taken the call will block - futures::future::poll_fn( - |cx| match Pin::new(&mut substream).poll_write(cx, &[0u8; 1]) { - Poll::Pending => Poll::Ready(()), - _ => panic!("invalid event"), - }, - ) - .await; - } - - #[tokio::test] - async fn backpressure_released_wakes_blocked_writer() { - use tokio::time::{sleep, timeout, Duration}; - - let (mut substream, mut handle) = Substream::new(); - - // Fill the channel to capacity, same pattern as `backpressure_works`. - for _ in 0..128 { - substream.write_all(&vec![0u8; 2 * MAX_FRAME_SIZE]).await.unwrap(); - } - - // Spawn a writer task that will try to write once more. This should initially block - // because the channel is full and rely on the AtomicWaker to be woken later. - let writer = tokio::spawn(async move { - substream - .write_all(&vec![1u8; MAX_FRAME_SIZE]) - .await - .expect("write should eventually succeed"); - }); - - // Give the writer a short moment to reach the blocked (Pending) state. - sleep(Duration::from_millis(10)).await; - assert!( - !writer.is_finished(), - "writer should be blocked by backpressure" - ); - - // Now consume a single message from the receiving side. This will: - // - free capacity in the channel - // - call `write_waker.wake()` from `poll_next` - // - // That wake must cause the blocked writer to be polled again and complete its write. - let _ = handle.next().await.expect("expected at least one outbound message"); - - // The writer should now complete in a timely fashion, proving that: - // - registering the waker before `try_reserve` works (no lost wakeup) - // - the wake from `poll_next` correctly unblocks the writer. - timeout(Duration::from_secs(1), writer) - .await - .expect("writer task did not complete after capacity was freed") - .expect("writer task panicked"); - } - - #[tokio::test] - async fn fin_flag_sent_on_shutdown() { - let (mut substream, mut handle) = Substream::new(); - - // Spawn shutdown since it waits for FIN_ACK - let shutdown_task = tokio::spawn(async move { - substream.shutdown().await.unwrap(); - }); - - // Should receive FIN flag - assert_eq!( - handle.next().await, - Some(Event::Message { - payload: vec![], - flag: Some(Flag::Fin) - }) - ); - - // Verify state is FinSent - assert!(matches!(*handle.state.lock(), State::FinSent)); - - // Send FIN_ACK to complete shutdown cleanly (avoids waiting for timeout) - handle - .on_message(WebRtcMessage { - payload: None, - flag: Some(Flag::FinAck), - }) - .await - .unwrap(); - - // Wait for shutdown to complete - shutdown_task.await.unwrap(); - } - - #[tokio::test] - async fn fin_ack_response_on_receiving_fin() { - let (mut substream, mut handle) = Substream::new(); - - // Spawn task to consume inbound events sent to the substream - let consumer_task = tokio::spawn(async move { - // Substream should receive RecvClosed - let mut buf = vec![0u8; 1024]; - match substream.read(&mut buf).await { - Err(e) if e.kind() == std::io::ErrorKind::BrokenPipe => { - // Expected - read half closed - } - other => panic!("Unexpected result: {:?}", other), - } - }); - - // Simulate receiving FIN from remote - handle - .on_message(WebRtcMessage { - payload: None, - flag: Some(Flag::Fin), - }) - .await - .unwrap(); - - // Wait for consumer task to complete - consumer_task.await.unwrap(); - - // Verify FIN_ACK was sent outbound to network - assert_eq!( - handle.next().await, - Some(Event::Message { - payload: vec![], - flag: Some(Flag::FinAck) - }) - ); - } - - #[tokio::test] - async fn fin_ack_received_transitions_to_fin_acked() { - let (mut substream, handle) = Substream::new(); - - // Spawn shutdown since it waits for FIN_ACK - let shutdown_task = tokio::spawn(async move { - substream.shutdown().await.unwrap(); - }); - - // Wait a bit for FIN to be sent - tokio::task::yield_now().await; - - // Verify we're in FinSent state - assert!(matches!(*handle.state.lock(), State::FinSent)); - - // Simulate receiving FIN_ACK from remote - handle - .on_message(WebRtcMessage { - payload: None, - flag: Some(Flag::FinAck), - }) - .await - .unwrap(); - - // Should transition to FinAcked - assert!(matches!(*handle.state.lock(), State::FinAcked)); - - // Shutdown should now complete - shutdown_task.await.unwrap(); - } - - #[tokio::test] - async fn full_fin_handshake() { - let (mut substream, mut handle) = Substream::new(); - - // Write some data - substream.write_all(&vec![1u8; 100]).await.unwrap(); - - // Spawn shutdown in background since it will wait for FIN_ACK - let shutdown_task = tokio::spawn(async move { - substream.shutdown().await.unwrap(); - }); - - // Verify data was sent - assert_eq!( - handle.next().await, - Some(Event::Message { - payload: vec![1u8; 100], - flag: None, - }) - ); - - // Verify FIN was sent - assert_eq!( - handle.next().await, - Some(Event::Message { - payload: vec![], - flag: Some(Flag::Fin) - }) - ); - - // Simulate receiving FIN_ACK - handle - .on_message(WebRtcMessage { - payload: None, - flag: Some(Flag::FinAck), - }) - .await - .unwrap(); - - // Should be in FinAcked state - assert!(matches!(*handle.state.lock(), State::FinAcked)); - - // Shutdown should now complete - shutdown_task.await.unwrap(); - } - - #[tokio::test] - async fn stop_sending_flag_closes_send_half() { - let (mut substream, handle) = Substream::new(); - - // Simulate receiving STOP_SENDING - handle - .on_message(WebRtcMessage { - payload: None, - flag: Some(Flag::StopSending), - }) - .await - .unwrap(); - - // Should transition to SendClosed - assert!(matches!(*handle.state.lock(), State::SendClosed)); - - // Attempting to write should fail - match substream.write_all(&vec![0u8; 100]).await { - Err(error) => assert_eq!(error.kind(), std::io::ErrorKind::BrokenPipe), - _ => panic!("write should have failed"), - } - } - - #[tokio::test] - async fn reset_stream_flag_closes_both_sides() { - use tokio::io::AsyncWriteExt; - let (mut substream, handle) = Substream::new(); - - // Simulate receiving RESET_STREAM - let result = handle - .on_message(WebRtcMessage { - payload: None, - flag: Some(Flag::ResetStream), - }) - .await; - - // Should return connection closed error - assert!(matches!(result, Err(Error::ConnectionClosed))); - - // Write side should be closed (state = SendClosed) - assert!(matches!(*handle.state.lock(), State::SendClosed)); - - // Attempting to write should fail - match substream.write_all(&vec![0u8; 100]).await { - Err(error) => assert_eq!(error.kind(), std::io::ErrorKind::BrokenPipe), - _ => panic!("write should have failed"), - } - - // Read side should also be closed (RecvClosed event was sent) - // The substream's rx channel should have RecvClosed - assert!(matches!(substream.rx.try_recv(), Ok(Event::RecvClosed))); - } - - #[tokio::test] - async fn fin_ack_does_not_trigger_other_flag() { - let (mut substream, handle) = Substream::new(); - - // Spawn shutdown since it waits for FIN_ACK - let shutdown_task = tokio::spawn(async move { - substream.shutdown().await.unwrap(); - }); - - // Wait a bit for FIN to be sent - tokio::task::yield_now().await; - - // Verify we're in FinSent state - assert!(matches!(*handle.state.lock(), State::FinSent)); - - // Now simulate receiving FIN_ACK (value = 3) - // This should NOT trigger STOP_SENDING (value = 1) or RESET_STREAM (value = 2) - // even though 3 & 1 == 1 and 3 & 2 == 2 - handle - .on_message(WebRtcMessage { - payload: None, - flag: Some(Flag::FinAck), - }) - .await - .unwrap(); - - // Should transition to FinAcked, not SendClosed - assert!(matches!(*handle.state.lock(), State::FinAcked)); - - // Shutdown should complete - shutdown_task.await.unwrap(); - - // Writing should still work (not closed by STOP_SENDING) - // Note: We already sent FIN, so write won't actually work, but the state check happens - // first - } - - #[tokio::test] - async fn flags_are_mutually_exclusive() { - let (_substream, handle) = Substream::new(); - - // Test that STOP_SENDING (1) is handled correctly - handle - .on_message(WebRtcMessage { - payload: None, - flag: Some(Flag::StopSending), - }) - .await - .unwrap(); - - assert!(matches!(*handle.state.lock(), State::SendClosed)); - - // Create a new substream for RESET_STREAM test - let (_substream2, handle2) = Substream::new(); - - // Test that RESET_STREAM (2) is handled correctly - let result = handle2 - .on_message(WebRtcMessage { - payload: None, - flag: Some(Flag::ResetStream), - }) - .await; - - assert!(matches!(result, Err(Error::ConnectionClosed))); - - // Create a new substream for FIN test - let (mut substream3, handle3) = Substream::new(); - - // Spawn shutdown since it waits for FIN_ACK - let shutdown_task3 = tokio::spawn(async move { - substream3.shutdown().await.unwrap(); - }); - - // Wait a bit for FIN to be sent - tokio::task::yield_now().await; - - // Test that FIN_ACK (3) is handled correctly - handle3 - .on_message(WebRtcMessage { - payload: None, - flag: Some(Flag::FinAck), - }) - .await - .unwrap(); - - assert!(matches!(*handle3.state.lock(), State::FinAcked)); - - // Shutdown should complete - shutdown_task3.await.unwrap(); - } - - #[tokio::test] - async fn stop_sending_wakes_blocked_writer() { - use tokio::io::AsyncWriteExt; - let (mut substream, handle) = Substream::new(); - - // Fill up the channel to cause poll_write to return Pending - // Channel capacity is 256 - for _ in 0..256 { - substream.write_all(&[1u8; 100]).await.unwrap(); - } - - // Now the next write should block waiting for channel capacity - let write_task = tokio::spawn(async move { - // This write will block because channel is full - let result = substream.write_all(&[2u8; 100]).await; - // Should fail because STOP_SENDING was received - assert!(result.is_err()); - }); - - // Give the writer time to block on poll_reserve - tokio::time::sleep(Duration::from_millis(10)).await; - assert!(!write_task.is_finished(), "write should be blocked"); - - // Simulate receiving STOP_SENDING from remote - handle - .on_message(WebRtcMessage { - payload: None, - flag: Some(Flag::StopSending), - }) - .await - .unwrap(); - - // The write task should wake up and see the state change - tokio::time::timeout(Duration::from_secs(1), write_task) - .await - .expect("write task should complete after STOP_SENDING") - .unwrap(); - } - - #[tokio::test] - async fn reset_stream_wakes_blocked_writer() { - use tokio::io::AsyncWriteExt; - let (mut substream, handle) = Substream::new(); - - // Fill up the channel to cause poll_write to return Pending - // Channel capacity is 256 - for _ in 0..256 { - substream.write_all(&[1u8; 100]).await.unwrap(); - } - - // Now the next write should block waiting for channel capacity - let write_task = tokio::spawn(async move { - // This write will block because channel is full - let result = substream.write_all(&[2u8; 100]).await; - // Should fail because RESET_STREAM was received - assert!(result.is_err()); - }); - - // Give the writer time to block on poll_reserve - tokio::time::sleep(Duration::from_millis(10)).await; - assert!(!write_task.is_finished(), "write should be blocked"); - - // Simulate receiving RESET_STREAM from remote - let result = handle - .on_message(WebRtcMessage { - payload: None, - flag: Some(Flag::ResetStream), - }) - .await; - // RESET_STREAM returns an error - assert!(result.is_err()); - - // The write task should wake up and see the state change - tokio::time::timeout(Duration::from_secs(1), write_task) - .await - .expect("write task should complete after RESET_STREAM") - .unwrap(); - } - - #[tokio::test] - async fn shutdown_rejects_new_writes() { - use tokio::io::AsyncWriteExt; - let (mut substream, mut handle) = Substream::new(); - - // Write some data - substream.write_all(&vec![1u8; 100]).await.unwrap(); - - // Spawn shutdown in background - let shutdown_task = tokio::spawn(async move { - substream.shutdown().await.unwrap(); - }); - - // Wait for data and FIN to be sent - assert_eq!( - handle.next().await, - Some(Event::Message { - payload: vec![1u8; 100], - flag: None, - }) - ); - assert_eq!( - handle.next().await, - Some(Event::Message { - payload: vec![], - flag: Some(Flag::Fin) - }) - ); - - // Verify we transitioned through Closing to FinSent - assert!(matches!(*handle.state.lock(), State::FinSent)); - - // Send FIN_ACK to complete shutdown - handle - .on_message(WebRtcMessage { - payload: None, - flag: Some(Flag::FinAck), - }) - .await - .unwrap(); - - // Shutdown should complete - shutdown_task.await.unwrap(); - } - - #[tokio::test] - async fn shutdown_idempotent() { - use tokio::io::AsyncWriteExt; - let (mut substream, mut handle) = Substream::new(); - - // Spawn first shutdown - let shutdown_task1 = tokio::spawn(async move { - substream.shutdown().await.unwrap(); - substream - }); - - // Wait for FIN to be sent - assert_eq!( - handle.next().await, - Some(Event::Message { - payload: vec![], - flag: Some(Flag::Fin) - }) - ); - assert!(matches!(*handle.state.lock(), State::FinSent)); - - // Send FIN_ACK to complete first shutdown - handle - .on_message(WebRtcMessage { - payload: None, - flag: Some(Flag::FinAck), - }) - .await - .unwrap(); - - // First shutdown should complete - let mut substream = shutdown_task1.await.unwrap(); - - // Second shutdown should succeed without error (already in FinAcked state) - substream.shutdown().await.unwrap(); - assert!(matches!(*handle.state.lock(), State::FinAcked)); - } - - #[tokio::test] - async fn shutdown_timeout_without_fin_ack() { - use tokio::time::{timeout, Duration}; - - let (mut substream, mut handle) = Substream::new(); - - // Spawn shutdown in background - let shutdown_task = tokio::spawn(async move { - substream.shutdown().await.unwrap(); - }); - - // Wait for FIN to be sent - assert_eq!( - handle.next().await, - Some(Event::Message { - payload: vec![], - flag: Some(Flag::Fin) - }) - ); - - // Verify we're in FinSent state - assert!(matches!(*handle.state.lock(), State::FinSent)); - - // DON'T send FIN_ACK - let it timeout - // The shutdown should complete after FIN_ACK_TIMEOUT (5 seconds) - // Add a bit of buffer to the timeout - let result = timeout(Duration::from_secs(7), shutdown_task).await; - - assert!(result.is_ok(), "Shutdown should complete after timeout"); - assert!( - result.unwrap().is_ok(), - "Shutdown should succeed after timeout" - ); - - // Should have transitioned to FinAcked after timeout - assert!(matches!(*handle.state.lock(), State::FinAcked)); - } - - #[tokio::test] - async fn closing_state_blocks_writes() { - use tokio::io::AsyncWriteExt; - - let (mut substream, handle) = Substream::new(); - - // Manually transition to Closing state - *handle.state.lock() = State::Closing; - - // Attempt to write should fail - let result = substream.write_all(&vec![1u8; 100]).await; - assert!(result.is_err()); - assert_eq!(result.unwrap_err().kind(), std::io::ErrorKind::BrokenPipe); - } - - #[tokio::test] - async fn handle_signals_closure_after_substream_dropped() { - use futures::StreamExt; - - let (mut substream, mut handle) = Substream::new(); - - // Complete shutdown handshake (client-initiated) - let shutdown_task = tokio::spawn(async move { - substream.shutdown().await.unwrap(); - // Substream will be dropped here - }); - - // Receive FIN - assert_eq!( - handle.next().await, - Some(Event::Message { - payload: vec![], - flag: Some(Flag::Fin) - }) - ); - - // Send FIN_ACK - handle - .on_message(WebRtcMessage { - payload: None, - flag: Some(Flag::FinAck), - }) - .await - .unwrap(); - - // Wait for shutdown to complete and Substream to drop - shutdown_task.await.unwrap(); - - // Verify handle signals closure (returns None) - assert_eq!( - handle.next().await, - None, - "SubstreamHandle should signal closure after Substream is dropped" - ); - } - - #[tokio::test] - async fn server_side_closure_after_receiving_fin() { - use futures::StreamExt; - - let (mut substream, mut handle) = Substream::new(); - - // Spawn task to consume from substream (server side) - let server_task = tokio::spawn(async move { - let mut buf = vec![0u8; 1024]; - // This should fail because we receive RecvClosed - match substream.read(&mut buf).await { - Err(e) if e.kind() == std::io::ErrorKind::BrokenPipe => { - // Expected - read half closed by FIN - } - other => panic!("Unexpected result: {:?}", other), - } - // Substream dropped here (server closes after receiving FIN) - }); - - // Remote (client) sends FIN - handle - .on_message(WebRtcMessage { - payload: None, - flag: Some(Flag::Fin), - }) - .await - .unwrap(); - - // Verify FIN_ACK was sent back - assert_eq!( - handle.next().await, - Some(Event::Message { - payload: vec![], - flag: Some(Flag::FinAck) - }) - ); - - // Wait for server to close substream - server_task.await.unwrap(); - - // Verify handle signals closure (returns None) - this is the key fix! - assert_eq!( - handle.next().await, - None, - "SubstreamHandle should signal closure after server receives FIN and drops Substream" - ); - } - - #[tokio::test] - async fn simultaneous_close() { - // Test simultaneous close where both sides send FIN at the same time. - // This verifies that: - // 1. Both sides can be in FinSent state simultaneously - // 2. Both sides correctly respond to FIN with FIN_ACK even when in FinSent state - // 3. Both sides eventually transition to FinAcked - - let (mut substream, mut handle) = Substream::new(); - - // Local side initiates shutdown (sends FIN, transitions to FinSent) - let shutdown_task = tokio::spawn(async move { - substream.shutdown().await.unwrap(); - }); - - // Wait for local FIN to be sent - assert_eq!( - handle.next().await, - Some(Event::Message { - payload: vec![], - flag: Some(Flag::Fin) - }) - ); - - // Verify local is in FinSent state - assert!(matches!(*handle.state.lock(), State::FinSent)); - - // Now simulate remote also sending FIN (simultaneous close) - // This should trigger FIN_ACK response even though we're in FinSent state - handle - .on_message(WebRtcMessage { - payload: None, - flag: Some(Flag::Fin), - }) - .await - .unwrap(); - - // Local should send FIN_ACK in response to remote's FIN - assert_eq!( - handle.next().await, - Some(Event::Message { - payload: vec![], - flag: Some(Flag::FinAck) - }) - ); - - // Local should still be in FinSent (waiting for FIN_ACK from remote) - assert!(matches!(*handle.state.lock(), State::FinSent)); - - // Now remote sends FIN_ACK (completing their side of the handshake) - handle - .on_message(WebRtcMessage { - payload: None, - flag: Some(Flag::FinAck), - }) - .await - .unwrap(); - - // Local should now transition to FinAcked - assert!(matches!(*handle.state.lock(), State::FinAcked)); - - // Shutdown should complete successfully - shutdown_task.await.unwrap(); - } - - #[tokio::test] - async fn fin_with_payload_delivers_data_before_close() { - // Test that when a FIN message contains payload data, the data is delivered - // to the substream before the RecvClosed event. This is important because - // the spec allows a FIN message to contain final data. - - let (mut substream, handle) = Substream::new(); - - // Simulate receiving FIN with payload from remote - handle - .on_message(WebRtcMessage { - payload: Some(b"final data".to_vec()), - flag: Some(Flag::Fin), - }) - .await - .unwrap(); - - // First, we should receive the payload data - let mut buf = vec![0u8; 1024]; - let n = substream.read(&mut buf).await.unwrap(); - assert_eq!(&buf[..n], b"final data"); - - // Then, subsequent read should fail with BrokenPipe (RecvClosed) - match substream.read(&mut buf).await { - Err(e) if e.kind() == std::io::ErrorKind::BrokenPipe => { - // Expected - read half closed after FIN - } - other => panic!("Expected BrokenPipe error, got: {:?}", other), - } - } + use super::*; + use futures::StreamExt; + use tokio::io::{AsyncRead, AsyncReadExt, AsyncWrite, AsyncWriteExt, ReadBuf}; + + #[tokio::test] + async fn write_small_frame() { + let (mut substream, mut handle) = Substream::new(); + + substream.write_all(&vec![0u8; 1337]).await.unwrap(); + + assert_eq!( + handle.next().await, + Some(Event::Message { payload: vec![0u8; 1337], flag: None }) + ); + + futures::future::poll_fn(|cx| match handle.poll_next_unpin(cx) { + Poll::Pending => Poll::Ready(()), + Poll::Ready(_) => panic!("invalid event"), + }) + .await; + } + + #[tokio::test] + async fn write_large_frame() { + let (mut substream, mut handle) = Substream::new(); + + substream.write_all(&vec![0u8; (2 * MAX_FRAME_SIZE) + 1]).await.unwrap(); + + assert_eq!( + handle.rx.recv().await, + Some(Event::Message { payload: vec![0u8; MAX_FRAME_SIZE], flag: None }) + ); + assert_eq!( + handle.rx.recv().await, + Some(Event::Message { payload: vec![0u8; MAX_FRAME_SIZE], flag: None }) + ); + assert_eq!( + handle.rx.recv().await, + Some(Event::Message { payload: vec![0u8; 1], flag: None }) + ); + + futures::future::poll_fn(|cx| match handle.poll_next_unpin(cx) { + Poll::Pending => Poll::Ready(()), + Poll::Ready(_) => panic!("invalid event"), + }) + .await; + } + + #[tokio::test] + async fn try_to_write_to_closed_substream() { + let (mut substream, handle) = Substream::new(); + *handle.state.lock() = State::SendClosed; + + match substream.write_all(&vec![0u8; 1337]).await { + Err(error) => assert_eq!(error.kind(), std::io::ErrorKind::BrokenPipe), + _ => panic!("invalid event"), + } + } + + #[tokio::test] + async fn substream_shutdown() { + let (mut substream, mut handle) = Substream::new(); + + substream.write_all(&vec![1u8; 1337]).await.unwrap(); + + // Spawn shutdown since it waits for FIN_ACK + let shutdown_task = tokio::spawn(async move { + substream.shutdown().await.unwrap(); + }); + + assert_eq!( + handle.next().await, + Some(Event::Message { payload: vec![1u8; 1337], flag: None }) + ); + // After shutdown, should send FIN flag + assert_eq!( + handle.next().await, + Some(Event::Message { payload: vec![], flag: Some(Flag::Fin) }) + ); + + // Send FIN_ACK to complete shutdown + handle + .on_message(WebRtcMessage { payload: None, flag: Some(Flag::FinAck) }) + .await + .unwrap(); + + shutdown_task.await.unwrap(); + } + + #[tokio::test] + async fn try_to_read_from_closed_substream() { + let (mut substream, handle) = Substream::new(); + handle + .on_message(WebRtcMessage { payload: None, flag: Some(Flag::Fin) }) + .await + .unwrap(); + + match substream.read(&mut vec![0u8; 256]).await { + Err(error) => assert_eq!(error.kind(), std::io::ErrorKind::BrokenPipe), + _ => panic!("invalid event"), + } + } + + #[tokio::test] + async fn read_small_frame() { + let (mut substream, handle) = Substream::new(); + handle + .inbound_tx + .send(Event::Message { payload: vec![1u8; 256], flag: None }) + .await + .unwrap(); + + let mut buf = vec![0u8; 2048]; + + match substream.read(&mut buf).await { + Ok(nread) => { + assert_eq!(nread, 256); + assert_eq!(buf[..nread], vec![1u8; 256]); + }, + Err(error) => panic!("invalid event: {error:?}"), + } + + let mut read_buf = ReadBuf::new(&mut buf); + futures::future::poll_fn(|cx| { + match Pin::new(&mut substream).poll_read(cx, &mut read_buf) { + Poll::Pending => Poll::Ready(()), + _ => panic!("invalid event"), + } + }) + .await; + } + + #[tokio::test] + async fn read_small_frame_in_two_reads() { + let (mut substream, handle) = Substream::new(); + let mut first = vec![1u8; 256]; + first.extend_from_slice(&vec![2u8; 256]); + + handle + .inbound_tx + .send(Event::Message { payload: first, flag: None }) + .await + .unwrap(); + + let mut buf = vec![0u8; 256]; + + match substream.read(&mut buf).await { + Ok(nread) => { + assert_eq!(nread, 256); + assert_eq!(buf[..nread], vec![1u8; 256]); + }, + Err(error) => panic!("invalid event: {error:?}"), + } + + match substream.read(&mut buf).await { + Ok(nread) => { + assert_eq!(nread, 256); + assert_eq!(buf[..nread], vec![2u8; 256]); + }, + Err(error) => panic!("invalid event: {error:?}"), + } + + let mut read_buf = ReadBuf::new(&mut buf); + futures::future::poll_fn(|cx| { + match Pin::new(&mut substream).poll_read(cx, &mut read_buf) { + Poll::Pending => Poll::Ready(()), + _ => panic!("invalid event"), + } + }) + .await; + } + + #[tokio::test] + async fn read_frames() { + let (mut substream, handle) = Substream::new(); + let mut first = vec![1u8; 256]; + first.extend_from_slice(&vec![2u8; 256]); + + handle + .inbound_tx + .send(Event::Message { payload: first, flag: None }) + .await + .unwrap(); + handle + .inbound_tx + .send(Event::Message { payload: vec![4u8; 2048], flag: None }) + .await + .unwrap(); + + let mut buf = vec![0u8; 256]; + + match substream.read(&mut buf).await { + Ok(nread) => { + assert_eq!(nread, 256); + assert_eq!(buf[..nread], vec![1u8; 256]); + }, + Err(error) => panic!("invalid event: {error:?}"), + } + + let mut buf = vec![0u8; 128]; + + match substream.read(&mut buf).await { + Ok(nread) => { + assert_eq!(nread, 128); + assert_eq!(buf[..nread], vec![2u8; 128]); + }, + Err(error) => panic!("invalid event: {error:?}"), + } + + let mut buf = vec![0u8; 128]; + + match substream.read(&mut buf).await { + Ok(nread) => { + assert_eq!(nread, 128); + assert_eq!(buf[..nread], vec![2u8; 128]); + }, + Err(error) => panic!("invalid event: {error:?}"), + } + + let mut buf = vec![0u8; MAX_FRAME_SIZE]; + + match substream.read(&mut buf).await { + Ok(nread) => { + assert_eq!(nread, 2048); + assert_eq!(buf[..nread], vec![4u8; 2048]); + }, + Err(error) => panic!("invalid event: {error:?}"), + } + + let mut read_buf = ReadBuf::new(&mut buf); + futures::future::poll_fn(|cx| { + match Pin::new(&mut substream).poll_read(cx, &mut read_buf) { + Poll::Pending => Poll::Ready(()), + _ => panic!("invalid event"), + } + }) + .await; + } + + #[tokio::test] + async fn backpressure_works() { + let (mut substream, _handle) = Substream::new(); + + // use all available bandwidth which by default is `256 * MAX_FRAME_SIZE`, + for _ in 0..128 { + substream.write_all(&vec![0u8; 2 * MAX_FRAME_SIZE]).await.unwrap(); + } + + // try to write one more byte but since all available bandwidth + // is taken the call will block + futures::future::poll_fn(|cx| match Pin::new(&mut substream).poll_write(cx, &[0u8; 1]) { + Poll::Pending => Poll::Ready(()), + _ => panic!("invalid event"), + }) + .await; + } + + #[tokio::test] + async fn backpressure_released_wakes_blocked_writer() { + use tokio::time::{sleep, timeout, Duration}; + + let (mut substream, mut handle) = Substream::new(); + + // Fill the channel to capacity, same pattern as `backpressure_works`. + for _ in 0..128 { + substream.write_all(&vec![0u8; 2 * MAX_FRAME_SIZE]).await.unwrap(); + } + + // Spawn a writer task that will try to write once more. This should initially block + // because the channel is full and rely on the AtomicWaker to be woken later. + let writer = tokio::spawn(async move { + substream + .write_all(&vec![1u8; MAX_FRAME_SIZE]) + .await + .expect("write should eventually succeed"); + }); + + // Give the writer a short moment to reach the blocked (Pending) state. + sleep(Duration::from_millis(10)).await; + assert!(!writer.is_finished(), "writer should be blocked by backpressure"); + + // Now consume a single message from the receiving side. This will: + // - free capacity in the channel + // - call `write_waker.wake()` from `poll_next` + // + // That wake must cause the blocked writer to be polled again and complete its write. + let _ = handle.next().await.expect("expected at least one outbound message"); + + // The writer should now complete in a timely fashion, proving that: + // - registering the waker before `try_reserve` works (no lost wakeup) + // - the wake from `poll_next` correctly unblocks the writer. + timeout(Duration::from_secs(1), writer) + .await + .expect("writer task did not complete after capacity was freed") + .expect("writer task panicked"); + } + + #[tokio::test] + async fn fin_flag_sent_on_shutdown() { + let (mut substream, mut handle) = Substream::new(); + + // Spawn shutdown since it waits for FIN_ACK + let shutdown_task = tokio::spawn(async move { + substream.shutdown().await.unwrap(); + }); + + // Should receive FIN flag + assert_eq!( + handle.next().await, + Some(Event::Message { payload: vec![], flag: Some(Flag::Fin) }) + ); + + // Verify state is FinSent + assert!(matches!(*handle.state.lock(), State::FinSent)); + + // Send FIN_ACK to complete shutdown cleanly (avoids waiting for timeout) + handle + .on_message(WebRtcMessage { payload: None, flag: Some(Flag::FinAck) }) + .await + .unwrap(); + + // Wait for shutdown to complete + shutdown_task.await.unwrap(); + } + + #[tokio::test] + async fn fin_ack_response_on_receiving_fin() { + let (mut substream, mut handle) = Substream::new(); + + // Spawn task to consume inbound events sent to the substream + let consumer_task = tokio::spawn(async move { + // Substream should receive RecvClosed + let mut buf = vec![0u8; 1024]; + match substream.read(&mut buf).await { + Err(e) if e.kind() == std::io::ErrorKind::BrokenPipe => { + // Expected - read half closed + }, + other => panic!("Unexpected result: {:?}", other), + } + }); + + // Simulate receiving FIN from remote + handle + .on_message(WebRtcMessage { payload: None, flag: Some(Flag::Fin) }) + .await + .unwrap(); + + // Wait for consumer task to complete + consumer_task.await.unwrap(); + + // Verify FIN_ACK was sent outbound to network + assert_eq!( + handle.next().await, + Some(Event::Message { payload: vec![], flag: Some(Flag::FinAck) }) + ); + } + + #[tokio::test] + async fn fin_ack_received_transitions_to_fin_acked() { + let (mut substream, handle) = Substream::new(); + + // Spawn shutdown since it waits for FIN_ACK + let shutdown_task = tokio::spawn(async move { + substream.shutdown().await.unwrap(); + }); + + // Wait a bit for FIN to be sent + tokio::task::yield_now().await; + + // Verify we're in FinSent state + assert!(matches!(*handle.state.lock(), State::FinSent)); + + // Simulate receiving FIN_ACK from remote + handle + .on_message(WebRtcMessage { payload: None, flag: Some(Flag::FinAck) }) + .await + .unwrap(); + + // Should transition to FinAcked + assert!(matches!(*handle.state.lock(), State::FinAcked)); + + // Shutdown should now complete + shutdown_task.await.unwrap(); + } + + #[tokio::test] + async fn full_fin_handshake() { + let (mut substream, mut handle) = Substream::new(); + + // Write some data + substream.write_all(&vec![1u8; 100]).await.unwrap(); + + // Spawn shutdown in background since it will wait for FIN_ACK + let shutdown_task = tokio::spawn(async move { + substream.shutdown().await.unwrap(); + }); + + // Verify data was sent + assert_eq!( + handle.next().await, + Some(Event::Message { payload: vec![1u8; 100], flag: None }) + ); + + // Verify FIN was sent + assert_eq!( + handle.next().await, + Some(Event::Message { payload: vec![], flag: Some(Flag::Fin) }) + ); + + // Simulate receiving FIN_ACK + handle + .on_message(WebRtcMessage { payload: None, flag: Some(Flag::FinAck) }) + .await + .unwrap(); + + // Should be in FinAcked state + assert!(matches!(*handle.state.lock(), State::FinAcked)); + + // Shutdown should now complete + shutdown_task.await.unwrap(); + } + + #[tokio::test] + async fn stop_sending_flag_closes_send_half() { + let (mut substream, handle) = Substream::new(); + + // Simulate receiving STOP_SENDING + handle + .on_message(WebRtcMessage { payload: None, flag: Some(Flag::StopSending) }) + .await + .unwrap(); + + // Should transition to SendClosed + assert!(matches!(*handle.state.lock(), State::SendClosed)); + + // Attempting to write should fail + match substream.write_all(&vec![0u8; 100]).await { + Err(error) => assert_eq!(error.kind(), std::io::ErrorKind::BrokenPipe), + _ => panic!("write should have failed"), + } + } + + #[tokio::test] + async fn reset_stream_flag_closes_both_sides() { + use tokio::io::AsyncWriteExt; + let (mut substream, handle) = Substream::new(); + + // Simulate receiving RESET_STREAM + let result = handle + .on_message(WebRtcMessage { payload: None, flag: Some(Flag::ResetStream) }) + .await; + + // Should return connection closed error + assert!(matches!(result, Err(Error::ConnectionClosed))); + + // Write side should be closed (state = SendClosed) + assert!(matches!(*handle.state.lock(), State::SendClosed)); + + // Attempting to write should fail + match substream.write_all(&vec![0u8; 100]).await { + Err(error) => assert_eq!(error.kind(), std::io::ErrorKind::BrokenPipe), + _ => panic!("write should have failed"), + } + + // Read side should also be closed (RecvClosed event was sent) + // The substream's rx channel should have RecvClosed + assert!(matches!(substream.rx.try_recv(), Ok(Event::RecvClosed))); + } + + #[tokio::test] + async fn fin_ack_does_not_trigger_other_flag() { + let (mut substream, handle) = Substream::new(); + + // Spawn shutdown since it waits for FIN_ACK + let shutdown_task = tokio::spawn(async move { + substream.shutdown().await.unwrap(); + }); + + // Wait a bit for FIN to be sent + tokio::task::yield_now().await; + + // Verify we're in FinSent state + assert!(matches!(*handle.state.lock(), State::FinSent)); + + // Now simulate receiving FIN_ACK (value = 3) + // This should NOT trigger STOP_SENDING (value = 1) or RESET_STREAM (value = 2) + // even though 3 & 1 == 1 and 3 & 2 == 2 + handle + .on_message(WebRtcMessage { payload: None, flag: Some(Flag::FinAck) }) + .await + .unwrap(); + + // Should transition to FinAcked, not SendClosed + assert!(matches!(*handle.state.lock(), State::FinAcked)); + + // Shutdown should complete + shutdown_task.await.unwrap(); + + // Writing should still work (not closed by STOP_SENDING) + // Note: We already sent FIN, so write won't actually work, but the state check happens + // first + } + + #[tokio::test] + async fn flags_are_mutually_exclusive() { + let (_substream, handle) = Substream::new(); + + // Test that STOP_SENDING (1) is handled correctly + handle + .on_message(WebRtcMessage { payload: None, flag: Some(Flag::StopSending) }) + .await + .unwrap(); + + assert!(matches!(*handle.state.lock(), State::SendClosed)); + + // Create a new substream for RESET_STREAM test + let (_substream2, handle2) = Substream::new(); + + // Test that RESET_STREAM (2) is handled correctly + let result = handle2 + .on_message(WebRtcMessage { payload: None, flag: Some(Flag::ResetStream) }) + .await; + + assert!(matches!(result, Err(Error::ConnectionClosed))); + + // Create a new substream for FIN test + let (mut substream3, handle3) = Substream::new(); + + // Spawn shutdown since it waits for FIN_ACK + let shutdown_task3 = tokio::spawn(async move { + substream3.shutdown().await.unwrap(); + }); + + // Wait a bit for FIN to be sent + tokio::task::yield_now().await; + + // Test that FIN_ACK (3) is handled correctly + handle3 + .on_message(WebRtcMessage { payload: None, flag: Some(Flag::FinAck) }) + .await + .unwrap(); + + assert!(matches!(*handle3.state.lock(), State::FinAcked)); + + // Shutdown should complete + shutdown_task3.await.unwrap(); + } + + #[tokio::test] + async fn stop_sending_wakes_blocked_writer() { + use tokio::io::AsyncWriteExt; + let (mut substream, handle) = Substream::new(); + + // Fill up the channel to cause poll_write to return Pending + // Channel capacity is 256 + for _ in 0..256 { + substream.write_all(&[1u8; 100]).await.unwrap(); + } + + // Now the next write should block waiting for channel capacity + let write_task = tokio::spawn(async move { + // This write will block because channel is full + let result = substream.write_all(&[2u8; 100]).await; + // Should fail because STOP_SENDING was received + assert!(result.is_err()); + }); + + // Give the writer time to block on poll_reserve + tokio::time::sleep(Duration::from_millis(10)).await; + assert!(!write_task.is_finished(), "write should be blocked"); + + // Simulate receiving STOP_SENDING from remote + handle + .on_message(WebRtcMessage { payload: None, flag: Some(Flag::StopSending) }) + .await + .unwrap(); + + // The write task should wake up and see the state change + tokio::time::timeout(Duration::from_secs(1), write_task) + .await + .expect("write task should complete after STOP_SENDING") + .unwrap(); + } + + #[tokio::test] + async fn reset_stream_wakes_blocked_writer() { + use tokio::io::AsyncWriteExt; + let (mut substream, handle) = Substream::new(); + + // Fill up the channel to cause poll_write to return Pending + // Channel capacity is 256 + for _ in 0..256 { + substream.write_all(&[1u8; 100]).await.unwrap(); + } + + // Now the next write should block waiting for channel capacity + let write_task = tokio::spawn(async move { + // This write will block because channel is full + let result = substream.write_all(&[2u8; 100]).await; + // Should fail because RESET_STREAM was received + assert!(result.is_err()); + }); + + // Give the writer time to block on poll_reserve + tokio::time::sleep(Duration::from_millis(10)).await; + assert!(!write_task.is_finished(), "write should be blocked"); + + // Simulate receiving RESET_STREAM from remote + let result = handle + .on_message(WebRtcMessage { payload: None, flag: Some(Flag::ResetStream) }) + .await; + // RESET_STREAM returns an error + assert!(result.is_err()); + + // The write task should wake up and see the state change + tokio::time::timeout(Duration::from_secs(1), write_task) + .await + .expect("write task should complete after RESET_STREAM") + .unwrap(); + } + + #[tokio::test] + async fn shutdown_rejects_new_writes() { + use tokio::io::AsyncWriteExt; + let (mut substream, mut handle) = Substream::new(); + + // Write some data + substream.write_all(&vec![1u8; 100]).await.unwrap(); + + // Spawn shutdown in background + let shutdown_task = tokio::spawn(async move { + substream.shutdown().await.unwrap(); + }); + + // Wait for data and FIN to be sent + assert_eq!( + handle.next().await, + Some(Event::Message { payload: vec![1u8; 100], flag: None }) + ); + assert_eq!( + handle.next().await, + Some(Event::Message { payload: vec![], flag: Some(Flag::Fin) }) + ); + + // Verify we transitioned through Closing to FinSent + assert!(matches!(*handle.state.lock(), State::FinSent)); + + // Send FIN_ACK to complete shutdown + handle + .on_message(WebRtcMessage { payload: None, flag: Some(Flag::FinAck) }) + .await + .unwrap(); + + // Shutdown should complete + shutdown_task.await.unwrap(); + } + + #[tokio::test] + async fn shutdown_idempotent() { + use tokio::io::AsyncWriteExt; + let (mut substream, mut handle) = Substream::new(); + + // Spawn first shutdown + let shutdown_task1 = tokio::spawn(async move { + substream.shutdown().await.unwrap(); + substream + }); + + // Wait for FIN to be sent + assert_eq!( + handle.next().await, + Some(Event::Message { payload: vec![], flag: Some(Flag::Fin) }) + ); + assert!(matches!(*handle.state.lock(), State::FinSent)); + + // Send FIN_ACK to complete first shutdown + handle + .on_message(WebRtcMessage { payload: None, flag: Some(Flag::FinAck) }) + .await + .unwrap(); + + // First shutdown should complete + let mut substream = shutdown_task1.await.unwrap(); + + // Second shutdown should succeed without error (already in FinAcked state) + substream.shutdown().await.unwrap(); + assert!(matches!(*handle.state.lock(), State::FinAcked)); + } + + #[tokio::test] + async fn shutdown_timeout_without_fin_ack() { + use tokio::time::{timeout, Duration}; + + let (mut substream, mut handle) = Substream::new(); + + // Spawn shutdown in background + let shutdown_task = tokio::spawn(async move { + substream.shutdown().await.unwrap(); + }); + + // Wait for FIN to be sent + assert_eq!( + handle.next().await, + Some(Event::Message { payload: vec![], flag: Some(Flag::Fin) }) + ); + + // Verify we're in FinSent state + assert!(matches!(*handle.state.lock(), State::FinSent)); + + // DON'T send FIN_ACK - let it timeout + // The shutdown should complete after FIN_ACK_TIMEOUT (5 seconds) + // Add a bit of buffer to the timeout + let result = timeout(Duration::from_secs(7), shutdown_task).await; + + assert!(result.is_ok(), "Shutdown should complete after timeout"); + assert!(result.unwrap().is_ok(), "Shutdown should succeed after timeout"); + + // Should have transitioned to FinAcked after timeout + assert!(matches!(*handle.state.lock(), State::FinAcked)); + } + + #[tokio::test] + async fn closing_state_blocks_writes() { + use tokio::io::AsyncWriteExt; + + let (mut substream, handle) = Substream::new(); + + // Manually transition to Closing state + *handle.state.lock() = State::Closing; + + // Attempt to write should fail + let result = substream.write_all(&vec![1u8; 100]).await; + assert!(result.is_err()); + assert_eq!(result.unwrap_err().kind(), std::io::ErrorKind::BrokenPipe); + } + + #[tokio::test] + async fn handle_signals_closure_after_substream_dropped() { + use futures::StreamExt; + + let (mut substream, mut handle) = Substream::new(); + + // Complete shutdown handshake (client-initiated) + let shutdown_task = tokio::spawn(async move { + substream.shutdown().await.unwrap(); + // Substream will be dropped here + }); + + // Receive FIN + assert_eq!( + handle.next().await, + Some(Event::Message { payload: vec![], flag: Some(Flag::Fin) }) + ); + + // Send FIN_ACK + handle + .on_message(WebRtcMessage { payload: None, flag: Some(Flag::FinAck) }) + .await + .unwrap(); + + // Wait for shutdown to complete and Substream to drop + shutdown_task.await.unwrap(); + + // Verify handle signals closure (returns None) + assert_eq!( + handle.next().await, + None, + "SubstreamHandle should signal closure after Substream is dropped" + ); + } + + #[tokio::test] + async fn server_side_closure_after_receiving_fin() { + use futures::StreamExt; + + let (mut substream, mut handle) = Substream::new(); + + // Spawn task to consume from substream (server side) + let server_task = tokio::spawn(async move { + let mut buf = vec![0u8; 1024]; + // This should fail because we receive RecvClosed + match substream.read(&mut buf).await { + Err(e) if e.kind() == std::io::ErrorKind::BrokenPipe => { + // Expected - read half closed by FIN + }, + other => panic!("Unexpected result: {:?}", other), + } + // Substream dropped here (server closes after receiving FIN) + }); + + // Remote (client) sends FIN + handle + .on_message(WebRtcMessage { payload: None, flag: Some(Flag::Fin) }) + .await + .unwrap(); + + // Verify FIN_ACK was sent back + assert_eq!( + handle.next().await, + Some(Event::Message { payload: vec![], flag: Some(Flag::FinAck) }) + ); + + // Wait for server to close substream + server_task.await.unwrap(); + + // Verify handle signals closure (returns None) - this is the key fix! + assert_eq!( + handle.next().await, + None, + "SubstreamHandle should signal closure after server receives FIN and drops Substream" + ); + } + + #[tokio::test] + async fn simultaneous_close() { + // Test simultaneous close where both sides send FIN at the same time. + // This verifies that: + // 1. Both sides can be in FinSent state simultaneously + // 2. Both sides correctly respond to FIN with FIN_ACK even when in FinSent state + // 3. Both sides eventually transition to FinAcked + + let (mut substream, mut handle) = Substream::new(); + + // Local side initiates shutdown (sends FIN, transitions to FinSent) + let shutdown_task = tokio::spawn(async move { + substream.shutdown().await.unwrap(); + }); + + // Wait for local FIN to be sent + assert_eq!( + handle.next().await, + Some(Event::Message { payload: vec![], flag: Some(Flag::Fin) }) + ); + + // Verify local is in FinSent state + assert!(matches!(*handle.state.lock(), State::FinSent)); + + // Now simulate remote also sending FIN (simultaneous close) + // This should trigger FIN_ACK response even though we're in FinSent state + handle + .on_message(WebRtcMessage { payload: None, flag: Some(Flag::Fin) }) + .await + .unwrap(); + + // Local should send FIN_ACK in response to remote's FIN + assert_eq!( + handle.next().await, + Some(Event::Message { payload: vec![], flag: Some(Flag::FinAck) }) + ); + + // Local should still be in FinSent (waiting for FIN_ACK from remote) + assert!(matches!(*handle.state.lock(), State::FinSent)); + + // Now remote sends FIN_ACK (completing their side of the handshake) + handle + .on_message(WebRtcMessage { payload: None, flag: Some(Flag::FinAck) }) + .await + .unwrap(); + + // Local should now transition to FinAcked + assert!(matches!(*handle.state.lock(), State::FinAcked)); + + // Shutdown should complete successfully + shutdown_task.await.unwrap(); + } + + #[tokio::test] + async fn fin_with_payload_delivers_data_before_close() { + // Test that when a FIN message contains payload data, the data is delivered + // to the substream before the RecvClosed event. This is important because + // the spec allows a FIN message to contain final data. + + let (mut substream, handle) = Substream::new(); + + // Simulate receiving FIN with payload from remote + handle + .on_message(WebRtcMessage { + payload: Some(b"final data".to_vec()), + flag: Some(Flag::Fin), + }) + .await + .unwrap(); + + // First, we should receive the payload data + let mut buf = vec![0u8; 1024]; + let n = substream.read(&mut buf).await.unwrap(); + assert_eq!(&buf[..n], b"final data"); + + // Then, subsequent read should fail with BrokenPipe (RecvClosed) + match substream.read(&mut buf).await { + Err(e) if e.kind() == std::io::ErrorKind::BrokenPipe => { + // Expected - read half closed after FIN + }, + other => panic!("Expected BrokenPipe error, got: {:?}", other), + } + } } diff --git a/client/litep2p/src/transport/webrtc/util.rs b/client/litep2p/src/transport/webrtc/util.rs index ae050d50..4be97792 100644 --- a/client/litep2p/src/transport/webrtc/util.rs +++ b/client/litep2p/src/transport/webrtc/util.rs @@ -19,8 +19,8 @@ // DEALINGS IN THE SOFTWARE. use crate::{ - error::ParseError, - transport::webrtc::schema::{self, webrtc::message::Flag}, + error::ParseError, + transport::webrtc::schema::{self, webrtc::message::Flag}, }; use prost::Message; @@ -28,121 +28,115 @@ use prost::Message; /// WebRTC message. #[derive(Debug)] pub struct WebRtcMessage { - /// Payload. - pub payload: Option>, + /// Payload. + pub payload: Option>, - /// Flag. - pub flag: Option, + /// Flag. + pub flag: Option, } impl WebRtcMessage { - /// Encode WebRTC message with optional flag. - /// - /// Uses a single allocation by pre-calculating the total size and encoding - /// the varint length prefix and protobuf message directly into the output buffer. - pub fn encode(payload: Vec, flag: Option) -> Vec { - let protobuf_payload = schema::webrtc::Message { - message: (!payload.is_empty()).then_some(payload), - flag: flag.map(|f| f as i32), - }; - - // Calculate sizes upfront for single allocation with exact capacity - let protobuf_len = protobuf_payload.encoded_len(); - // Varint uses 7 bits per byte, so calculate exact length needed - // ilog2 gives the position of the highest set bit (0-indexed), divide by 7 for varint bytes - let varint_len = if protobuf_len == 0 { - 1 - } else { - (protobuf_len.ilog2() as usize / 7) + 1 - }; - - // Single allocation for the entire output with exact size - let mut out_buf = Vec::with_capacity(varint_len + protobuf_len); - - // Encode varint length prefix directly - let mut varint_buf = unsigned_varint::encode::usize_buffer(); - let varint_slice = unsigned_varint::encode::usize(protobuf_len, &mut varint_buf); - out_buf.extend_from_slice(varint_slice); - - // Encode protobuf directly into output buffer - protobuf_payload - .encode(&mut out_buf) - .expect("Vec to provide needed capacity"); - - out_buf - } - - /// Decode payload into [`WebRtcMessage`]. - /// - /// Decodes the varint length prefix directly from the slice without allocations, - /// then decodes the protobuf message from the remaining bytes. - /// - /// # Flag handling - /// - /// Unknown flag values (e.g., from a newer protocol version) are logged as warnings - /// and treated as `None` for forward compatibility. This allows the message payload - /// to still be processed even if the flag is not recognized. - pub fn decode(payload: &[u8]) -> Result { - // Decode varint length prefix directly from slice (no allocation) - // Returns (decoded_length, remaining_bytes_after_varint) - let (len, remaining) = - unsigned_varint::decode::usize(payload).map_err(|_| ParseError::InvalidData)?; - - // Get exactly `len` bytes of protobuf data (no allocation) - let protobuf_data = remaining.get(..len).ok_or(ParseError::InvalidData)?; - - match schema::webrtc::Message::decode(protobuf_data) { - Ok(message) => { - let flag = message.flag.and_then(|f| match Flag::try_from(f) { - Ok(flag) => Some(flag), - Err(_) => { - tracing::warn!( - target: "litep2p::webrtc", - ?f, - "received message with unknown flag value, ignoring flag" - ); - None - } - }); - Ok(Self { - payload: message.message, - flag, - }) - } - Err(_) => Err(ParseError::InvalidData), - } - } + /// Encode WebRTC message with optional flag. + /// + /// Uses a single allocation by pre-calculating the total size and encoding + /// the varint length prefix and protobuf message directly into the output buffer. + pub fn encode(payload: Vec, flag: Option) -> Vec { + let protobuf_payload = schema::webrtc::Message { + message: (!payload.is_empty()).then_some(payload), + flag: flag.map(|f| f as i32), + }; + + // Calculate sizes upfront for single allocation with exact capacity + let protobuf_len = protobuf_payload.encoded_len(); + // Varint uses 7 bits per byte, so calculate exact length needed + // ilog2 gives the position of the highest set bit (0-indexed), divide by 7 for varint bytes + let varint_len = + if protobuf_len == 0 { 1 } else { (protobuf_len.ilog2() as usize / 7) + 1 }; + + // Single allocation for the entire output with exact size + let mut out_buf = Vec::with_capacity(varint_len + protobuf_len); + + // Encode varint length prefix directly + let mut varint_buf = unsigned_varint::encode::usize_buffer(); + let varint_slice = unsigned_varint::encode::usize(protobuf_len, &mut varint_buf); + out_buf.extend_from_slice(varint_slice); + + // Encode protobuf directly into output buffer + protobuf_payload + .encode(&mut out_buf) + .expect("Vec to provide needed capacity"); + + out_buf + } + + /// Decode payload into [`WebRtcMessage`]. + /// + /// Decodes the varint length prefix directly from the slice without allocations, + /// then decodes the protobuf message from the remaining bytes. + /// + /// # Flag handling + /// + /// Unknown flag values (e.g., from a newer protocol version) are logged as warnings + /// and treated as `None` for forward compatibility. This allows the message payload + /// to still be processed even if the flag is not recognized. + pub fn decode(payload: &[u8]) -> Result { + // Decode varint length prefix directly from slice (no allocation) + // Returns (decoded_length, remaining_bytes_after_varint) + let (len, remaining) = + unsigned_varint::decode::usize(payload).map_err(|_| ParseError::InvalidData)?; + + // Get exactly `len` bytes of protobuf data (no allocation) + let protobuf_data = remaining.get(..len).ok_or(ParseError::InvalidData)?; + + match schema::webrtc::Message::decode(protobuf_data) { + Ok(message) => { + let flag = message.flag.and_then(|f| match Flag::try_from(f) { + Ok(flag) => Some(flag), + Err(_) => { + tracing::warn!( + target: "litep2p::webrtc", + ?f, + "received message with unknown flag value, ignoring flag" + ); + None + }, + }); + Ok(Self { payload: message.message, flag }) + }, + Err(_) => Err(ParseError::InvalidData), + } + } } #[cfg(test)] mod tests { - use super::*; - - #[test] - fn with_payload_no_flag() { - let message = WebRtcMessage::encode("Hello, world!".as_bytes().to_vec(), None); - let decoded = WebRtcMessage::decode(&message).unwrap(); - - assert_eq!(decoded.payload, Some("Hello, world!".as_bytes().to_vec())); - assert_eq!(decoded.flag, None); - } - - #[test] - fn with_payload_and_flag() { - let message = - WebRtcMessage::encode("Hello, world!".as_bytes().to_vec(), Some(Flag::StopSending)); - let decoded = WebRtcMessage::decode(&message).unwrap(); - - assert_eq!(decoded.payload, Some("Hello, world!".as_bytes().to_vec())); - assert_eq!(decoded.flag, Some(Flag::StopSending)); - } - - #[test] - fn no_payload_with_flag() { - let message = WebRtcMessage::encode(vec![], Some(Flag::ResetStream)); - let decoded = WebRtcMessage::decode(&message).unwrap(); - - assert_eq!(decoded.payload, None); - assert_eq!(decoded.flag, Some(Flag::ResetStream)); - } + use super::*; + + #[test] + fn with_payload_no_flag() { + let message = WebRtcMessage::encode("Hello, world!".as_bytes().to_vec(), None); + let decoded = WebRtcMessage::decode(&message).unwrap(); + + assert_eq!(decoded.payload, Some("Hello, world!".as_bytes().to_vec())); + assert_eq!(decoded.flag, None); + } + + #[test] + fn with_payload_and_flag() { + let message = + WebRtcMessage::encode("Hello, world!".as_bytes().to_vec(), Some(Flag::StopSending)); + let decoded = WebRtcMessage::decode(&message).unwrap(); + + assert_eq!(decoded.payload, Some("Hello, world!".as_bytes().to_vec())); + assert_eq!(decoded.flag, Some(Flag::StopSending)); + } + + #[test] + fn no_payload_with_flag() { + let message = WebRtcMessage::encode(vec![], Some(Flag::ResetStream)); + let decoded = WebRtcMessage::decode(&message).unwrap(); + + assert_eq!(decoded.payload, None); + assert_eq!(decoded.flag, Some(Flag::ResetStream)); + } } diff --git a/client/litep2p/src/transport/websocket/config.rs b/client/litep2p/src/transport/websocket/config.rs index 0d5aee29..4e570f98 100644 --- a/client/litep2p/src/transport/websocket/config.rs +++ b/client/litep2p/src/transport/websocket/config.rs @@ -21,89 +21,89 @@ //! WebSocket transport configuration. use crate::{ - crypto::noise::{MAX_READ_AHEAD_FACTOR, MAX_WRITE_BUFFER_SIZE}, - transport::{CONNECTION_OPEN_TIMEOUT, MAX_PARALLEL_DIALS, SUBSTREAM_OPEN_TIMEOUT}, + crypto::noise::{MAX_READ_AHEAD_FACTOR, MAX_WRITE_BUFFER_SIZE}, + transport::{CONNECTION_OPEN_TIMEOUT, MAX_PARALLEL_DIALS, SUBSTREAM_OPEN_TIMEOUT}, }; /// WebSocket transport configuration. #[derive(Debug)] pub struct Config { - /// Listen address address for the transport. - /// - /// Default listen addreses are ["/ip4/0.0.0.0/tcp/0/ws", "/ip6/::/tcp/0/ws"]. - pub listen_addresses: Vec, + /// Listen address address for the transport. + /// + /// Default listen addreses are ["/ip4/0.0.0.0/tcp/0/ws", "/ip6/::/tcp/0/ws"]. + pub listen_addresses: Vec, - /// Whether to set `SO_REUSEPORT` and bind a socket to the listen address port for outbound - /// connections. - /// - /// Note that `SO_REUSEADDR` is always set on listening sockets. - /// - /// Defaults to `true`. - pub reuse_port: bool, + /// Whether to set `SO_REUSEPORT` and bind a socket to the listen address port for outbound + /// connections. + /// + /// Note that `SO_REUSEADDR` is always set on listening sockets. + /// + /// Defaults to `true`. + pub reuse_port: bool, - /// Enable `TCP_NODELAY`. - /// - /// Defaults to `false`. - pub nodelay: bool, + /// Enable `TCP_NODELAY`. + /// + /// Defaults to `false`. + pub nodelay: bool, - /// Yamux configuration. - pub yamux_config: crate::yamux::Config, + /// Yamux configuration. + pub yamux_config: crate::yamux::Config, - /// Noise read-ahead frame count. - /// - /// Specifies how many Noise frames are read per call to the underlying socket. - /// - /// By default this is configured to `5` so each call to the underlying socket can read up - /// to `5` Noise frame per call. Fewer frames may be read if there isn't enough data in the - /// socket. Each Noise frame is `65 KB` so the default setting allocates `65 KB * 5 = 325 KB` - /// per connection. - pub noise_read_ahead_frame_count: usize, + /// Noise read-ahead frame count. + /// + /// Specifies how many Noise frames are read per call to the underlying socket. + /// + /// By default this is configured to `5` so each call to the underlying socket can read up + /// to `5` Noise frame per call. Fewer frames may be read if there isn't enough data in the + /// socket. Each Noise frame is `65 KB` so the default setting allocates `65 KB * 5 = 325 KB` + /// per connection. + pub noise_read_ahead_frame_count: usize, - /// Noise write buffer size. - /// - /// Specifes how many Noise frames are tried to be coalesced into a single system call. - /// By default the value is set to `2` which means that the `NoiseSocket` will allocate - /// `130 KB` for each outgoing connection. - /// - /// The write buffer size is separate from the read-ahead frame count so by default - /// the Noise code will allocate `2 * 65 KB + 5 * 65 KB = 455 KB` per connection. - pub noise_write_buffer_size: usize, + /// Noise write buffer size. + /// + /// Specifes how many Noise frames are tried to be coalesced into a single system call. + /// By default the value is set to `2` which means that the `NoiseSocket` will allocate + /// `130 KB` for each outgoing connection. + /// + /// The write buffer size is separate from the read-ahead frame count so by default + /// the Noise code will allocate `2 * 65 KB + 5 * 65 KB = 455 KB` per connection. + pub noise_write_buffer_size: usize, - /// Connection open timeout. - /// - /// How long should litep2p wait for a connection to be opened before the host - /// is deemed unreachable. - pub connection_open_timeout: std::time::Duration, + /// Connection open timeout. + /// + /// How long should litep2p wait for a connection to be opened before the host + /// is deemed unreachable. + pub connection_open_timeout: std::time::Duration, - /// Substream open timeout. - /// - /// How long should litep2p wait for a substream to be opened before considering - /// the substream rejected. - pub substream_open_timeout: std::time::Duration, + /// Substream open timeout. + /// + /// How long should litep2p wait for a substream to be opened before considering + /// the substream rejected. + pub substream_open_timeout: std::time::Duration, - /// Maximum number of parallel dial attempts for a single peer. - /// - /// **Note:** This value is overridden by the top-level - /// [`ConfigBuilder::with_max_parallel_dials`](crate::config::ConfigBuilder::with_max_parallel_dials) - /// when building `Litep2p`. - pub max_parallel_dials: usize, + /// Maximum number of parallel dial attempts for a single peer. + /// + /// **Note:** This value is overridden by the top-level + /// [`ConfigBuilder::with_max_parallel_dials`](crate::config::ConfigBuilder::with_max_parallel_dials) + /// when building `Litep2p`. + pub max_parallel_dials: usize, } impl Default for Config { - fn default() -> Self { - Self { - listen_addresses: vec![ - "/ip4/0.0.0.0/tcp/0/ws".parse().expect("valid address"), - "/ip6/::/tcp/0/ws".parse().expect("valid address"), - ], - reuse_port: true, - nodelay: false, - yamux_config: Default::default(), - noise_read_ahead_frame_count: MAX_READ_AHEAD_FACTOR, - noise_write_buffer_size: MAX_WRITE_BUFFER_SIZE, - connection_open_timeout: CONNECTION_OPEN_TIMEOUT, - substream_open_timeout: SUBSTREAM_OPEN_TIMEOUT, - max_parallel_dials: MAX_PARALLEL_DIALS, - } - } + fn default() -> Self { + Self { + listen_addresses: vec![ + "/ip4/0.0.0.0/tcp/0/ws".parse().expect("valid address"), + "/ip6/::/tcp/0/ws".parse().expect("valid address"), + ], + reuse_port: true, + nodelay: false, + yamux_config: Default::default(), + noise_read_ahead_frame_count: MAX_READ_AHEAD_FACTOR, + noise_write_buffer_size: MAX_WRITE_BUFFER_SIZE, + connection_open_timeout: CONNECTION_OPEN_TIMEOUT, + substream_open_timeout: SUBSTREAM_OPEN_TIMEOUT, + max_parallel_dials: MAX_PARALLEL_DIALS, + } + } } diff --git a/client/litep2p/src/transport/websocket/connection.rs b/client/litep2p/src/transport/websocket/connection.rs index 7420466f..e28d0ed9 100644 --- a/client/litep2p/src/transport/websocket/connection.rs +++ b/client/litep2p/src/transport/websocket/connection.rs @@ -19,21 +19,21 @@ // DEALINGS IN THE SOFTWARE. use crate::{ - config::Role, - crypto::{ - dilithium::Keypair, - noise::{self, NoiseSocket}, - }, - error::{Error, NegotiationError, SubstreamError}, - multistream_select::{dialer_select_proto, listener_select_proto, Negotiated, Version}, - protocol::{Direction, Permit, ProtocolCommand, ProtocolSet, SubstreamKeepAlive}, - substream, - transport::{ - websocket::{stream::BufferedStream, substream::Substream}, - Endpoint, - }, - types::{protocol::ProtocolName, ConnectionId, SubstreamId}, - BandwidthSink, PeerId, + config::Role, + crypto::{ + dilithium::Keypair, + noise::{self, NoiseSocket}, + }, + error::{Error, NegotiationError, SubstreamError}, + multistream_select::{dialer_select_proto, listener_select_proto, Negotiated, Version}, + protocol::{Direction, Permit, ProtocolCommand, ProtocolSet, SubstreamKeepAlive}, + substream, + transport::{ + websocket::{stream::BufferedStream, substream::Substream}, + Endpoint, + }, + types::{protocol::ProtocolName, ConnectionId, SubstreamId}, + BandwidthSink, PeerId, }; use futures::{future::BoxFuture, stream::FuturesUnordered, AsyncRead, AsyncWrite, StreamExt}; @@ -46,9 +46,9 @@ use url::Url; use std::{collections::HashMap, time::Duration}; mod schema { - pub(super) mod noise { - include!(concat!(env!("OUT_DIR"), "/noise.rs")); - } + pub(super) mod noise { + include!(concat!(env!("OUT_DIR"), "/noise.rs")); + } } /// Logging target for the file. @@ -56,1355 +56,1347 @@ const LOG_TARGET: &str = "litep2p::websocket::connection"; /// Negotiated substream and its context. pub struct NegotiatedSubstream { - /// Substream direction. - direction: Direction, + /// Substream direction. + direction: Direction, - /// Substream ID. - substream_id: SubstreamId, + /// Substream ID. + substream_id: SubstreamId, - /// Protocol name. - protocol: ProtocolName, + /// Protocol name. + protocol: ProtocolName, - /// Yamux substream. - io: crate::yamux::Stream, + /// Yamux substream. + io: crate::yamux::Stream, - /// Permit. - permit: Permit, + /// Permit. + permit: Permit, - /// Whether this substream keeps connection alive while it exists. - keep_alive: SubstreamKeepAlive, + /// Whether this substream keeps connection alive while it exists. + keep_alive: SubstreamKeepAlive, } /// WebSocket connection error. #[derive(Debug)] enum ConnectionError { - /// Timeout - Timeout { - /// Protocol. - protocol: Option, - - /// Substream ID. - substream_id: Option, - }, - - /// Failed to negotiate connection/substream. - FailedToNegotiate { - /// Protocol. - protocol: Option, - - /// Substream ID. - substream_id: Option, - - /// Error. - error: SubstreamError, - }, + /// Timeout + Timeout { + /// Protocol. + protocol: Option, + + /// Substream ID. + substream_id: Option, + }, + + /// Failed to negotiate connection/substream. + FailedToNegotiate { + /// Protocol. + protocol: Option, + + /// Substream ID. + substream_id: Option, + + /// Error. + error: SubstreamError, + }, } /// Negotiated connection. pub(super) struct NegotiatedConnection { - /// Remote peer ID. - peer: PeerId, + /// Remote peer ID. + peer: PeerId, - /// Endpoint. - endpoint: Endpoint, + /// Endpoint. + endpoint: Endpoint, - /// Yamux connection. - connection: - crate::yamux::ControlledConnection>>>, + /// Yamux connection. + connection: + crate::yamux::ControlledConnection>>>, - /// Yamux control. - control: crate::yamux::Control, + /// Yamux control. + control: crate::yamux::Control, } impl std::fmt::Debug for NegotiatedConnection { - fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result { - f.debug_struct("NegotiatedConnection") - .field("peer", &self.peer) - .field("endpoint", &self.endpoint) - .finish() - } + fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result { + f.debug_struct("NegotiatedConnection") + .field("peer", &self.peer) + .field("endpoint", &self.endpoint) + .finish() + } } impl NegotiatedConnection { - /// Get `ConnectionId` of the negotiated connection. - pub fn connection_id(&self) -> ConnectionId { - self.endpoint.connection_id() - } - - /// Get `PeerId` of the negotiated connection. - pub fn peer(&self) -> PeerId { - self.peer - } - - /// Get `Endpoint` of the negotiated connection. - pub fn endpoint(&self) -> Endpoint { - self.endpoint.clone() - } + /// Get `ConnectionId` of the negotiated connection. + pub fn connection_id(&self) -> ConnectionId { + self.endpoint.connection_id() + } + + /// Get `PeerId` of the negotiated connection. + pub fn peer(&self) -> PeerId { + self.peer + } + + /// Get `Endpoint` of the negotiated connection. + pub fn endpoint(&self) -> Endpoint { + self.endpoint.clone() + } } /// WebSocket connection. pub(crate) struct WebSocketConnection { - /// Protocol context. - protocol_set: ProtocolSet, + /// Protocol context. + protocol_set: ProtocolSet, - /// Yamux connection. - connection: - crate::yamux::ControlledConnection>>>, + /// Yamux connection. + connection: + crate::yamux::ControlledConnection>>>, - /// Yamux control. - control: crate::yamux::Control, + /// Yamux control. + control: crate::yamux::Control, - /// Remote peer ID. - peer: PeerId, + /// Remote peer ID. + peer: PeerId, - /// Endpoint. - _endpoint: Endpoint, + /// Endpoint. + _endpoint: Endpoint, - /// Substream open timeout. - substream_open_timeout: Duration, + /// Substream open timeout. + substream_open_timeout: Duration, - /// Connection ID. - connection_id: ConnectionId, + /// Connection ID. + connection_id: ConnectionId, - /// Bandwidth sink. - bandwidth_sink: BandwidthSink, + /// Bandwidth sink. + bandwidth_sink: BandwidthSink, - /// Pending substreams. - pending_substreams: - FuturesUnordered>>, + /// Pending substreams. + pending_substreams: + FuturesUnordered>>, } impl WebSocketConnection { - /// Create new [`WebSocketConnection`]. - pub(super) fn new( - connection: NegotiatedConnection, - protocol_set: ProtocolSet, - bandwidth_sink: BandwidthSink, - substream_open_timeout: Duration, - ) -> Self { - let NegotiatedConnection { - peer, - endpoint, - connection, - control, - } = connection; - - Self { - connection_id: endpoint.connection_id(), - protocol_set, - connection, - control, - peer, - _endpoint: endpoint, - bandwidth_sink, - substream_open_timeout, - pending_substreams: FuturesUnordered::new(), - } - } - - /// Negotiate protocol. - async fn negotiate_protocol( - stream: S, - role: &Role, - protocols: Vec<&str>, - substream_open_timeout: Duration, - ) -> Result<(Negotiated, ProtocolName), NegotiationError> { - tracing::trace!(target: LOG_TARGET, ?protocols, "negotiating protocols"); - - match tokio::time::timeout(substream_open_timeout, async move { - match role { - Role::Dialer => dialer_select_proto(stream, protocols, Version::V1).await, - Role::Listener => listener_select_proto(stream, protocols).await, - } - }) - .await - { - Err(_) => Err(NegotiationError::Timeout), - Ok(Err(error)) => Err(NegotiationError::MultistreamSelectError(error)), - Ok(Ok((protocol, socket))) => { - tracing::trace!(target: LOG_TARGET, ?protocol, "protocol negotiated"); - - Ok((socket, ProtocolName::from(protocol.to_string()))) - } - } - } - - /// Open WebSocket connection. - pub(super) async fn open_connection( - connection_id: ConnectionId, - keypair: Keypair, - stream: WebSocketStream>, - address: Multiaddr, - dialed_peer: PeerId, - ws_address: Url, - yamux_config: crate::yamux::Config, - max_read_ahead_factor: usize, - max_write_buffer_size: usize, - substream_open_timeout: Duration, - ) -> Result { - tracing::trace!( - target: LOG_TARGET, - ?address, - ?ws_address, - ?connection_id, - "open connection to remote peer", - ); - - Self::negotiate_connection( - stream, - Some(dialed_peer), - Role::Dialer, - address, - connection_id, - keypair, - yamux_config, - max_read_ahead_factor, - max_write_buffer_size, - substream_open_timeout, - ) - .await - } - - /// Accept WebSocket connection. - pub(super) async fn accept_connection( - stream: TcpStream, - connection_id: ConnectionId, - keypair: Keypair, - address: Multiaddr, - yamux_config: crate::yamux::Config, - max_read_ahead_factor: usize, - max_write_buffer_size: usize, - substream_open_timeout: Duration, - ) -> Result { - let stream = MaybeTlsStream::Plain(stream); - - Self::negotiate_connection( - tokio_tungstenite::accept_async(stream) - .await - .map_err(NegotiationError::WebSocket)?, - None, - Role::Listener, - address, - connection_id, - keypair, - yamux_config, - max_read_ahead_factor, - max_write_buffer_size, - substream_open_timeout, - ) - .await - } - - /// Negotiate WebSocket connection. - pub(super) async fn negotiate_connection( - stream: WebSocketStream>, - dialed_peer: Option, - role: Role, - address: Multiaddr, - connection_id: ConnectionId, - keypair: Keypair, - yamux_config: crate::yamux::Config, - max_read_ahead_factor: usize, - max_write_buffer_size: usize, - substream_open_timeout: Duration, - ) -> Result { - tracing::trace!( - target: LOG_TARGET, - ?connection_id, - ?address, - ?role, - ?dialed_peer, - "negotiate connection" - ); - let stream = BufferedStream::new(stream); - - // negotiate `noise` - let (stream, _) = - Self::negotiate_protocol(stream, &role, vec!["/noise"], substream_open_timeout).await?; - - tracing::trace!( - target: LOG_TARGET, - "`multistream-select` and `noise` negotiated" - ); - - // perform noise handshake - let (stream, peer) = noise::handshake( - stream.inner(), - &keypair, - role, - max_read_ahead_factor, - max_write_buffer_size, - substream_open_timeout, - noise::HandshakeTransport::WebSocket, - ) - .await?; - - if let Some(dialed_peer) = dialed_peer { - if peer != dialed_peer { - return Err(NegotiationError::PeerIdMismatch(dialed_peer, peer)); - } - } - - let stream: NoiseSocket> = stream; - tracing::trace!(target: LOG_TARGET, "noise handshake done"); - - // negotiate `yamux` - let (stream, _) = - Self::negotiate_protocol(stream, &role, vec!["/yamux/1.0.0"], substream_open_timeout) - .await?; - tracing::trace!(target: LOG_TARGET, "`yamux` negotiated"); - - let connection = crate::yamux::Connection::new(stream.inner(), yamux_config, role.into()); - let (control, connection) = crate::yamux::Control::new(connection); - - let address = match role { - Role::Dialer => address, - Role::Listener => address.with(Protocol::P2p(Multihash::from(peer))), - }; - - Ok(NegotiatedConnection { - peer, - control, - connection, - endpoint: match role { - Role::Dialer => Endpoint::dialer(address, connection_id), - Role::Listener => Endpoint::listener(address, connection_id), - }, - }) - } - - /// Accept substream. - pub async fn accept_substream( - stream: crate::yamux::Stream, - permit: Permit, - substream_id: SubstreamId, - protocols: HashMap, - substream_open_timeout: Duration, - ) -> Result { - tracing::trace!( - target: LOG_TARGET, - ?substream_id, - "accept inbound substream" - ); - - let protocol_names = protocols.keys().map(|protocol| &**protocol).collect::>(); - let (io, protocol) = Self::negotiate_protocol( - stream, - &Role::Listener, - protocol_names, - substream_open_timeout, - ) - .await?; - let keep_alive = *protocols.get(&protocol).expect("protocol to be one of the keys"); - - tracing::trace!( - target: LOG_TARGET, - ?substream_id, - "substream accepted and negotiated" - ); - - Ok(NegotiatedSubstream { - io: io.inner(), - direction: Direction::Inbound, - substream_id, - protocol, - permit, - keep_alive, - }) - } - - /// Open substream for `protocol`. - pub async fn open_substream( - mut control: crate::yamux::Control, - permit: Permit, - substream_id: SubstreamId, - protocol: ProtocolName, - fallback_names: Vec, - substream_open_timeout: Duration, - keep_alive: SubstreamKeepAlive, - ) -> Result { - tracing::debug!(target: LOG_TARGET, ?protocol, ?substream_id, "open substream"); - - let stream = match control.open_stream().await { - Ok(stream) => { - tracing::trace!(target: LOG_TARGET, ?substream_id, "substream opened"); - stream - } - Err(error) => { - tracing::debug!( - target: LOG_TARGET, - ?substream_id, - ?error, - "failed to open substream" - ); - return Err(SubstreamError::YamuxError( - error, - Direction::Outbound(substream_id), - )); - } - }; - - // TODO: https://github.com/paritytech/litep2p/issues/346 protocols don't change after - // they've been initialized so this should be done only once - let protocols = std::iter::once(&*protocol) - .chain(fallback_names.iter().map(|protocol| &**protocol)) - .collect(); - - let (io, protocol) = - Self::negotiate_protocol(stream, &Role::Dialer, protocols, substream_open_timeout) - .await?; - - Ok(NegotiatedSubstream { - io: io.inner(), - substream_id, - direction: Direction::Outbound(substream_id), - protocol, - permit, - keep_alive, - }) - } - - /// Start the connection event loop without notifying protocols. - /// This is used when protocols have already been notified during accept(). - pub(crate) async fn start(mut self) -> crate::Result<()> { - loop { - tokio::select! { - substream = self.connection.next() => match substream { - Some(Ok(stream)) => { - let substream = self.protocol_set.next_substream_id(); - let protocols = self.protocol_set.protocols_with_keep_alives(); - let permit = self.protocol_set.try_get_permit().ok_or(Error::ConnectionClosed)?; - let substream_open_timeout = self.substream_open_timeout; - - self.pending_substreams.push(Box::pin(async move { - match tokio::time::timeout( - substream_open_timeout, - Self::accept_substream(stream, permit, substream, protocols, substream_open_timeout), - ) - .await - { - Ok(Ok(substream)) => Ok(substream), - Ok(Err(error)) => Err(ConnectionError::FailedToNegotiate { - protocol: None, - substream_id: None, - error: SubstreamError::NegotiationError(error), - }), - Err(_) => Err(ConnectionError::Timeout { - protocol: None, - substream_id: None - }), - } - })); - }, - Some(Err(error)) => { - tracing::debug!( - target: LOG_TARGET, - peer = ?self.peer, - ?error, - "connection closed with error" - ); - self.protocol_set.report_connection_closed(self.peer, self.connection_id).await?; - - return Ok(()) - } - None => { - tracing::debug!(target: LOG_TARGET, peer = ?self.peer, "connection closed"); - self.protocol_set.report_connection_closed(self.peer, self.connection_id).await?; - - return Ok(()) - } - }, - substream = self.pending_substreams.select_next_some(), if !self.pending_substreams.is_empty() => { - match substream { - Err(error) => { - tracing::debug!( - target: LOG_TARGET, - ?error, - "failed to accept/open substream", - ); - - let (protocol, substream_id, error) = match error { - ConnectionError::Timeout { protocol, substream_id } => { - (protocol, substream_id, SubstreamError::NegotiationError(NegotiationError::Timeout)) - } - ConnectionError::FailedToNegotiate { protocol, substream_id, error } => { - (protocol, substream_id, error) - } - }; - - if let (Some(protocol), Some(substream_id)) = (protocol, substream_id) { - self.protocol_set - .report_substream_open_failure(protocol, substream_id, error) - .await?; - } - } - Ok(substream) => { - let protocol = substream.protocol.clone(); - let direction = substream.direction; - let substream_id = substream.substream_id; - let socket = FuturesAsyncReadCompatExt::compat(substream.io); - let bandwidth_sink = self.bandwidth_sink.clone(); - let opening_permit = substream.permit; - let lifetime_permit = - substream.keep_alive.then(|| opening_permit.clone()); - - let substream = substream::Substream::new_websocket( - self.peer, - substream_id, - Substream::new(socket, bandwidth_sink, lifetime_permit), - self.protocol_set.protocol_codec(&protocol) - ); - - self.protocol_set.report_substream_open( - self.peer, - protocol, - direction, - substream, - opening_permit, - ).await?; - } - } - } - protocol = self.protocol_set.next() => match protocol { - Some(ProtocolCommand::OpenSubstream { - protocol, - fallback_names, - substream_id, - permit, - keep_alive, - connection_id: _, - }) => { - let control = self.control.clone(); - let substream_open_timeout = self.substream_open_timeout; - - tracing::trace!( - target: LOG_TARGET, - ?protocol, - ?substream_id, - "open substream" - ); - - self.pending_substreams.push(Box::pin(async move { - match tokio::time::timeout( - substream_open_timeout, - Self::open_substream( - control, - permit, - substream_id, - protocol.clone(), - fallback_names, - substream_open_timeout, - keep_alive, - ), - ) - .await - { - Ok(Ok(substream)) => Ok(substream), - Ok(Err(error)) => Err(ConnectionError::FailedToNegotiate { - protocol: Some(protocol), - substream_id: Some(substream_id), - error, - }), - Err(_) => Err(ConnectionError::Timeout { - protocol: Some(protocol), - substream_id: Some(substream_id) - }), - } - })); - } - Some(ProtocolCommand::ForceClose) => { - tracing::debug!( - target: LOG_TARGET, - peer = ?self.peer, - connection_id = ?self.connection_id, - "force closing connection", - ); - - return self.protocol_set.report_connection_closed(self.peer, self.connection_id).await - } - None => { - tracing::debug!(target: LOG_TARGET, "protocols have exited, shutting down connection"); - return self.protocol_set.report_connection_closed(self.peer, self.connection_id).await - } - } - } - } - } + /// Create new [`WebSocketConnection`]. + pub(super) fn new( + connection: NegotiatedConnection, + protocol_set: ProtocolSet, + bandwidth_sink: BandwidthSink, + substream_open_timeout: Duration, + ) -> Self { + let NegotiatedConnection { peer, endpoint, connection, control } = connection; + + Self { + connection_id: endpoint.connection_id(), + protocol_set, + connection, + control, + peer, + _endpoint: endpoint, + bandwidth_sink, + substream_open_timeout, + pending_substreams: FuturesUnordered::new(), + } + } + + /// Negotiate protocol. + async fn negotiate_protocol( + stream: S, + role: &Role, + protocols: Vec<&str>, + substream_open_timeout: Duration, + ) -> Result<(Negotiated, ProtocolName), NegotiationError> { + tracing::trace!(target: LOG_TARGET, ?protocols, "negotiating protocols"); + + match tokio::time::timeout(substream_open_timeout, async move { + match role { + Role::Dialer => dialer_select_proto(stream, protocols, Version::V1).await, + Role::Listener => listener_select_proto(stream, protocols).await, + } + }) + .await + { + Err(_) => Err(NegotiationError::Timeout), + Ok(Err(error)) => Err(NegotiationError::MultistreamSelectError(error)), + Ok(Ok((protocol, socket))) => { + tracing::trace!(target: LOG_TARGET, ?protocol, "protocol negotiated"); + + Ok((socket, ProtocolName::from(protocol.to_string()))) + }, + } + } + + /// Open WebSocket connection. + pub(super) async fn open_connection( + connection_id: ConnectionId, + keypair: Keypair, + stream: WebSocketStream>, + address: Multiaddr, + dialed_peer: PeerId, + ws_address: Url, + yamux_config: crate::yamux::Config, + max_read_ahead_factor: usize, + max_write_buffer_size: usize, + substream_open_timeout: Duration, + ) -> Result { + tracing::trace!( + target: LOG_TARGET, + ?address, + ?ws_address, + ?connection_id, + "open connection to remote peer", + ); + + Self::negotiate_connection( + stream, + Some(dialed_peer), + Role::Dialer, + address, + connection_id, + keypair, + yamux_config, + max_read_ahead_factor, + max_write_buffer_size, + substream_open_timeout, + ) + .await + } + + /// Accept WebSocket connection. + pub(super) async fn accept_connection( + stream: TcpStream, + connection_id: ConnectionId, + keypair: Keypair, + address: Multiaddr, + yamux_config: crate::yamux::Config, + max_read_ahead_factor: usize, + max_write_buffer_size: usize, + substream_open_timeout: Duration, + ) -> Result { + let stream = MaybeTlsStream::Plain(stream); + + Self::negotiate_connection( + tokio_tungstenite::accept_async(stream) + .await + .map_err(NegotiationError::WebSocket)?, + None, + Role::Listener, + address, + connection_id, + keypair, + yamux_config, + max_read_ahead_factor, + max_write_buffer_size, + substream_open_timeout, + ) + .await + } + + /// Negotiate WebSocket connection. + pub(super) async fn negotiate_connection( + stream: WebSocketStream>, + dialed_peer: Option, + role: Role, + address: Multiaddr, + connection_id: ConnectionId, + keypair: Keypair, + yamux_config: crate::yamux::Config, + max_read_ahead_factor: usize, + max_write_buffer_size: usize, + substream_open_timeout: Duration, + ) -> Result { + tracing::trace!( + target: LOG_TARGET, + ?connection_id, + ?address, + ?role, + ?dialed_peer, + "negotiate connection" + ); + let stream = BufferedStream::new(stream); + + // negotiate `noise` + let (stream, _) = + Self::negotiate_protocol(stream, &role, vec!["/noise"], substream_open_timeout).await?; + + tracing::trace!( + target: LOG_TARGET, + "`multistream-select` and `noise` negotiated" + ); + + // perform noise handshake + let (stream, peer) = noise::handshake( + stream.inner(), + &keypair, + role, + max_read_ahead_factor, + max_write_buffer_size, + substream_open_timeout, + noise::HandshakeTransport::WebSocket, + ) + .await?; + + if let Some(dialed_peer) = dialed_peer { + if peer != dialed_peer { + return Err(NegotiationError::PeerIdMismatch(dialed_peer, peer)); + } + } + + let stream: NoiseSocket> = stream; + tracing::trace!(target: LOG_TARGET, "noise handshake done"); + + // negotiate `yamux` + let (stream, _) = + Self::negotiate_protocol(stream, &role, vec!["/yamux/1.0.0"], substream_open_timeout) + .await?; + tracing::trace!(target: LOG_TARGET, "`yamux` negotiated"); + + let connection = crate::yamux::Connection::new(stream.inner(), yamux_config, role.into()); + let (control, connection) = crate::yamux::Control::new(connection); + + let address = match role { + Role::Dialer => address, + Role::Listener => address.with(Protocol::P2p(Multihash::from(peer))), + }; + + Ok(NegotiatedConnection { + peer, + control, + connection, + endpoint: match role { + Role::Dialer => Endpoint::dialer(address, connection_id), + Role::Listener => Endpoint::listener(address, connection_id), + }, + }) + } + + /// Accept substream. + pub async fn accept_substream( + stream: crate::yamux::Stream, + permit: Permit, + substream_id: SubstreamId, + protocols: HashMap, + substream_open_timeout: Duration, + ) -> Result { + tracing::trace!( + target: LOG_TARGET, + ?substream_id, + "accept inbound substream" + ); + + let protocol_names = protocols.keys().map(|protocol| &**protocol).collect::>(); + let (io, protocol) = Self::negotiate_protocol( + stream, + &Role::Listener, + protocol_names, + substream_open_timeout, + ) + .await?; + let keep_alive = *protocols.get(&protocol).expect("protocol to be one of the keys"); + + tracing::trace!( + target: LOG_TARGET, + ?substream_id, + "substream accepted and negotiated" + ); + + Ok(NegotiatedSubstream { + io: io.inner(), + direction: Direction::Inbound, + substream_id, + protocol, + permit, + keep_alive, + }) + } + + /// Open substream for `protocol`. + pub async fn open_substream( + mut control: crate::yamux::Control, + permit: Permit, + substream_id: SubstreamId, + protocol: ProtocolName, + fallback_names: Vec, + substream_open_timeout: Duration, + keep_alive: SubstreamKeepAlive, + ) -> Result { + tracing::debug!(target: LOG_TARGET, ?protocol, ?substream_id, "open substream"); + + let stream = match control.open_stream().await { + Ok(stream) => { + tracing::trace!(target: LOG_TARGET, ?substream_id, "substream opened"); + stream + }, + Err(error) => { + tracing::debug!( + target: LOG_TARGET, + ?substream_id, + ?error, + "failed to open substream" + ); + return Err(SubstreamError::YamuxError(error, Direction::Outbound(substream_id))); + }, + }; + + // TODO: https://github.com/paritytech/litep2p/issues/346 protocols don't change after + // they've been initialized so this should be done only once + let protocols = std::iter::once(&*protocol) + .chain(fallback_names.iter().map(|protocol| &**protocol)) + .collect(); + + let (io, protocol) = + Self::negotiate_protocol(stream, &Role::Dialer, protocols, substream_open_timeout) + .await?; + + Ok(NegotiatedSubstream { + io: io.inner(), + substream_id, + direction: Direction::Outbound(substream_id), + protocol, + permit, + keep_alive, + }) + } + + /// Start the connection event loop without notifying protocols. + /// This is used when protocols have already been notified during accept(). + pub(crate) async fn start(mut self) -> crate::Result<()> { + loop { + tokio::select! { + substream = self.connection.next() => match substream { + Some(Ok(stream)) => { + let substream = self.protocol_set.next_substream_id(); + let protocols = self.protocol_set.protocols_with_keep_alives(); + let permit = self.protocol_set.try_get_permit().ok_or(Error::ConnectionClosed)?; + let substream_open_timeout = self.substream_open_timeout; + + self.pending_substreams.push(Box::pin(async move { + match tokio::time::timeout( + substream_open_timeout, + Self::accept_substream(stream, permit, substream, protocols, substream_open_timeout), + ) + .await + { + Ok(Ok(substream)) => Ok(substream), + Ok(Err(error)) => Err(ConnectionError::FailedToNegotiate { + protocol: None, + substream_id: None, + error: SubstreamError::NegotiationError(error), + }), + Err(_) => Err(ConnectionError::Timeout { + protocol: None, + substream_id: None + }), + } + })); + }, + Some(Err(error)) => { + tracing::debug!( + target: LOG_TARGET, + peer = ?self.peer, + ?error, + "connection closed with error" + ); + self.protocol_set.report_connection_closed(self.peer, self.connection_id).await?; + + return Ok(()) + } + None => { + tracing::debug!(target: LOG_TARGET, peer = ?self.peer, "connection closed"); + self.protocol_set.report_connection_closed(self.peer, self.connection_id).await?; + + return Ok(()) + } + }, + substream = self.pending_substreams.select_next_some(), if !self.pending_substreams.is_empty() => { + match substream { + Err(error) => { + tracing::debug!( + target: LOG_TARGET, + ?error, + "failed to accept/open substream", + ); + + let (protocol, substream_id, error) = match error { + ConnectionError::Timeout { protocol, substream_id } => { + (protocol, substream_id, SubstreamError::NegotiationError(NegotiationError::Timeout)) + } + ConnectionError::FailedToNegotiate { protocol, substream_id, error } => { + (protocol, substream_id, error) + } + }; + + if let (Some(protocol), Some(substream_id)) = (protocol, substream_id) { + self.protocol_set + .report_substream_open_failure(protocol, substream_id, error) + .await?; + } + } + Ok(substream) => { + let protocol = substream.protocol.clone(); + let direction = substream.direction; + let substream_id = substream.substream_id; + let socket = FuturesAsyncReadCompatExt::compat(substream.io); + let bandwidth_sink = self.bandwidth_sink.clone(); + let opening_permit = substream.permit; + let lifetime_permit = + substream.keep_alive.then(|| opening_permit.clone()); + + let substream = substream::Substream::new_websocket( + self.peer, + substream_id, + Substream::new(socket, bandwidth_sink, lifetime_permit), + self.protocol_set.protocol_codec(&protocol) + ); + + self.protocol_set.report_substream_open( + self.peer, + protocol, + direction, + substream, + opening_permit, + ).await?; + } + } + } + protocol = self.protocol_set.next() => match protocol { + Some(ProtocolCommand::OpenSubstream { + protocol, + fallback_names, + substream_id, + permit, + keep_alive, + connection_id: _, + }) => { + let control = self.control.clone(); + let substream_open_timeout = self.substream_open_timeout; + + tracing::trace!( + target: LOG_TARGET, + ?protocol, + ?substream_id, + "open substream" + ); + + self.pending_substreams.push(Box::pin(async move { + match tokio::time::timeout( + substream_open_timeout, + Self::open_substream( + control, + permit, + substream_id, + protocol.clone(), + fallback_names, + substream_open_timeout, + keep_alive, + ), + ) + .await + { + Ok(Ok(substream)) => Ok(substream), + Ok(Err(error)) => Err(ConnectionError::FailedToNegotiate { + protocol: Some(protocol), + substream_id: Some(substream_id), + error, + }), + Err(_) => Err(ConnectionError::Timeout { + protocol: Some(protocol), + substream_id: Some(substream_id) + }), + } + })); + } + Some(ProtocolCommand::ForceClose) => { + tracing::debug!( + target: LOG_TARGET, + peer = ?self.peer, + connection_id = ?self.connection_id, + "force closing connection", + ); + + return self.protocol_set.report_connection_closed(self.peer, self.connection_id).await + } + None => { + tracing::debug!(target: LOG_TARGET, "protocols have exited, shutting down connection"); + return self.protocol_set.report_connection_closed(self.peer, self.connection_id).await + } + } + } + } + } } #[cfg(test)] mod tests { - use crate::transport::websocket::WebSocketTransport; - - use super::*; - use futures::AsyncWriteExt; - use hickory_resolver::TokioResolver; - use std::sync::Arc; - use tokio::net::TcpListener; - - #[tokio::test] - async fn multistream_select_not_supported_dialer() { - let _ = tracing_subscriber::fmt() - .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) - .try_init(); - - let listener = TcpListener::bind("[::1]:0").await.unwrap(); - let address = listener.local_addr().unwrap(); - - tokio::spawn(async move { - let (stream, _) = listener.accept().await.unwrap(); - // Negotiate websocket. - let stream = tokio_tungstenite::accept_async(stream).await.unwrap(); - let mut stream = BufferedStream::new(stream); - stream.write_all(&vec![0x12u8; 256]).await.unwrap(); - }); - - let peer_id = PeerId::random(); - let address = Multiaddr::empty() - .with(Protocol::from(address.ip())) - .with(Protocol::Tcp(address.port())) - .with(Protocol::Ws(std::borrow::Cow::Borrowed("/"))) - .with(Protocol::P2p(peer_id.into())); - - let (url, peer) = WebSocketTransport::multiaddr_into_url(address.clone()).unwrap(); - - let (_, stream) = WebSocketTransport::dial_peer( - address.clone(), - Default::default(), - Duration::from_secs(10), - false, - Arc::new(TokioResolver::builder_tokio().unwrap().build()), - ) - .await - .unwrap(); - - match WebSocketConnection::open_connection( - ConnectionId::from(0usize), - Keypair::generate(), - stream, - address.clone(), - peer, - url, - Default::default(), - 5, - 2, - Duration::from_secs(10), - ) - .await - { - Ok(_) => panic!("connection was supposed to fail"), - Err(NegotiationError::MultistreamSelectError( - crate::multistream_select::NegotiationError::ProtocolError(_), - )) => {} - Err(error) => panic!("invalid error: {error:?}"), - } - } - - #[tokio::test] - async fn multistream_select_not_supported_listener() { - let _ = tracing_subscriber::fmt() - .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) - .try_init(); - - let listener = TcpListener::bind("[::1]:0").await.unwrap(); - let address = listener.local_addr().unwrap(); - - let (Ok(dialer), Ok((stream, dialer_address))) = - tokio::join!(TcpStream::connect(address), listener.accept(),) - else { - panic!("failed to establish connection"); - }; - - let peer_id = PeerId::random(); - let dialer_address = Multiaddr::empty() - .with(Protocol::from(dialer_address.ip())) - .with(Protocol::Tcp(dialer_address.port())) - .with(Protocol::Ws(std::borrow::Cow::Borrowed("/"))) - .with(Protocol::P2p(peer_id.into())); - - let (url, _peer) = WebSocketTransport::multiaddr_into_url(dialer_address.clone()).unwrap(); - - tokio::spawn(async move { - // Negotiate websocket. - let stream = tokio_tungstenite::client_async_tls(url, dialer).await.unwrap().0; - let mut dialer = BufferedStream::new(stream); - let _ = dialer.write_all(&vec![0x12u8; 256]).await; - }); - - match WebSocketConnection::accept_connection( - stream, - ConnectionId::from(0usize), - Keypair::generate(), - dialer_address, - Default::default(), - 5, - 2, - Duration::from_secs(10), - ) - .await - { - Ok(_) => panic!("connection was supposed to fail"), - Err(NegotiationError::MultistreamSelectError( - crate::multistream_select::NegotiationError::ProtocolError(_), - )) => {} - Err(error) => panic!("invalid error: {error:?}"), - } - } - - #[tokio::test] - async fn noise_not_supported_dialer() { - let _ = tracing_subscriber::fmt() - .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) - .try_init(); - - let listener = TcpListener::bind("[::1]:0").await.unwrap(); - let address = listener.local_addr().unwrap(); - - tokio::spawn(async move { - let (stream, _) = listener.accept().await.unwrap(); - let stream = tokio_tungstenite::accept_async(stream).await.unwrap(); - let stream = BufferedStream::new(stream); - - // attempt to negotiate yamux, skipping noise entirely - assert!(WebSocketConnection::negotiate_protocol( - stream, - &Role::Listener, - vec!["/yamux/1.0.0"], - std::time::Duration::from_secs(10), - ) - .await - .is_err()); - }); - - let peer_id = PeerId::random(); - let address = Multiaddr::empty() - .with(Protocol::from(address.ip())) - .with(Protocol::Tcp(address.port())) - .with(Protocol::Ws(std::borrow::Cow::Borrowed("/"))) - .with(Protocol::P2p(peer_id.into())); - - let (url, peer) = WebSocketTransport::multiaddr_into_url(address.clone()).unwrap(); - let (_, stream) = WebSocketTransport::dial_peer( - address.clone(), - Default::default(), - Duration::from_secs(10), - false, - Arc::new(TokioResolver::builder_tokio().unwrap().build()), - ) - .await - .unwrap(); - - match WebSocketConnection::open_connection( - ConnectionId::from(0usize), - Keypair::generate(), - stream, - address.clone(), - peer, - url, - Default::default(), - 5, - 2, - Duration::from_secs(10), - ) - .await - { - Ok(_) => panic!("connection was supposed to fail"), - Err(NegotiationError::MultistreamSelectError( - crate::multistream_select::NegotiationError::Failed, - )) => {} - Err(error) => panic!("invalid error: {error:?}"), - } - } - - #[tokio::test] - async fn noise_not_supported_listener() { - let _ = tracing_subscriber::fmt() - .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) - .try_init(); - - let listener = TcpListener::bind("[::1]:0").await.unwrap(); - let address = listener.local_addr().unwrap(); - - let (Ok(dialer), Ok((stream, dialer_address))) = - tokio::join!(TcpStream::connect(address), listener.accept(),) - else { - panic!("failed to establish connection"); - }; - - let peer_id = PeerId::random(); - let dialer_address = Multiaddr::empty() - .with(Protocol::from(dialer_address.ip())) - .with(Protocol::Tcp(dialer_address.port())) - .with(Protocol::Ws(std::borrow::Cow::Borrowed("/"))) - .with(Protocol::P2p(peer_id.into())); - - let (url, _peer) = WebSocketTransport::multiaddr_into_url(dialer_address.clone()).unwrap(); - - tokio::spawn(async move { - // Negotiate websocket. - let stream = tokio_tungstenite::client_async_tls(url, dialer).await.unwrap().0; - let dialer = BufferedStream::new(stream); - - // attempt to negotiate yamux, skipping noise entirely - assert!(WebSocketConnection::negotiate_protocol( - dialer, - &Role::Dialer, - vec!["/yamux/1.0.0"], - std::time::Duration::from_secs(10), - ) - .await - .is_err()); - }); - - match WebSocketConnection::accept_connection( - stream, - ConnectionId::from(0usize), - Keypair::generate(), - dialer_address, - Default::default(), - 5, - 2, - Duration::from_secs(10), - ) - .await - { - Ok(_) => panic!("connection was supposed to fail"), - Err(NegotiationError::MultistreamSelectError( - crate::multistream_select::NegotiationError::Failed, - )) => {} - Err(error) => panic!("invalid error: {error:?}"), - } - } - - #[tokio::test] - async fn noise_timeout_listener() { - let _ = tracing_subscriber::fmt() - .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) - .try_init(); - - let listener = TcpListener::bind("[::1]:0").await.unwrap(); - let address = listener.local_addr().unwrap(); - - let (Ok(dialer), Ok((stream, dialer_address))) = - tokio::join!(TcpStream::connect(address), listener.accept(),) - else { - panic!("failed to establish connection"); - }; - - let keypair = Keypair::generate(); - let peer_id = PeerId::from_public_key(&keypair.public().into()); - - let dialer_address = Multiaddr::empty() - .with(Protocol::from(dialer_address.ip())) - .with(Protocol::Tcp(dialer_address.port())) - .with(Protocol::Ws(std::borrow::Cow::Borrowed("/"))) - .with(Protocol::P2p(peer_id.into())); - - let (url, _peer) = WebSocketTransport::multiaddr_into_url(dialer_address.clone()).unwrap(); - - tokio::spawn(async move { - // Negotiate websocket. - let stream = tokio_tungstenite::client_async_tls(url, dialer).await.unwrap().0; - let dialer = BufferedStream::new(stream); - - // Sleep while negotiating /yamux. - let (stream, _proto) = WebSocketConnection::negotiate_protocol( - dialer, - &Role::Dialer, - vec!["/noise"], - std::time::Duration::from_secs(10), - ) - .await - .unwrap(); - - let (_stream, _peer) = noise::handshake( - stream.inner(), - &keypair, - Role::Dialer, - 5, - 2, - std::time::Duration::from_secs(10), - noise::HandshakeTransport::WebSocket, - ) - .await - .unwrap(); - - tokio::time::sleep(std::time::Duration::from_secs(60)).await; - }); - - match WebSocketConnection::accept_connection( - stream, - ConnectionId::from(0usize), - Keypair::generate(), - dialer_address, - Default::default(), - 5, - 2, - Duration::from_secs(10), - ) - .await - { - Ok(_) => panic!("connection was supposed to fail"), - Err(NegotiationError::Timeout) => {} - Err(error) => panic!("invalid error: {error:?}"), - } - } - - #[tokio::test] - async fn noise_wrong_handshake_listener() { - let _ = tracing_subscriber::fmt() - .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) - .try_init(); - - let listener = TcpListener::bind("[::1]:0").await.unwrap(); - let address = listener.local_addr().unwrap(); - - let (Ok(dialer), Ok((stream, dialer_address))) = - tokio::join!(TcpStream::connect(address), listener.accept(),) - else { - panic!("failed to establish connection"); - }; - - let peer_id = PeerId::random(); - - let dialer_address = Multiaddr::empty() - .with(Protocol::from(dialer_address.ip())) - .with(Protocol::Tcp(dialer_address.port())) - .with(Protocol::Ws(std::borrow::Cow::Borrowed("/"))) - .with(Protocol::P2p(peer_id.into())); - - let (url, _peer) = WebSocketTransport::multiaddr_into_url(dialer_address.clone()).unwrap(); - - tokio::spawn(async move { - // Negotiate websocket. - let stream = tokio_tungstenite::client_async_tls(url, dialer).await.unwrap().0; - let dialer = BufferedStream::new(stream); - - // Sleep while negotiating /yamux. - let (stream, _proto) = WebSocketConnection::negotiate_protocol( - dialer, - &Role::Dialer, - vec!["/noise"], - std::time::Duration::from_secs(10), - ) - .await - .unwrap(); - - // The next step is providing the noise handshake. However, we jump - // directly to negotiating yamux. - let (_stream, _proto) = WebSocketConnection::negotiate_protocol( - stream, - &Role::Dialer, - vec!["/yamux/1.0.0"], - std::time::Duration::from_secs(10), - ) - .await - .unwrap(); - - tokio::time::sleep(std::time::Duration::from_secs(60)).await; - }); - - match WebSocketConnection::accept_connection( - stream, - ConnectionId::from(0usize), - Keypair::generate(), - dialer_address, - Default::default(), - 5, - 2, - Duration::from_secs(10), - ) - .await - { - Ok(_) => panic!("connection was supposed to fail"), - Err(NegotiationError::Timeout) => {} - Err(error) => panic!("invalid error: {error:?}"), - } - } - - #[tokio::test] - async fn noise_timeout_dialer() { - let _ = tracing_subscriber::fmt() - .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) - .try_init(); - - let listener = TcpListener::bind("[::1]:0").await.unwrap(); - let address = listener.local_addr().unwrap(); - - tokio::spawn(async move { - let (stream, _) = listener.accept().await.unwrap(); - let stream = tokio_tungstenite::accept_async(stream).await.unwrap(); - let stream = BufferedStream::new(stream); - - let (_stream, _proto) = WebSocketConnection::negotiate_protocol( - stream, - &Role::Listener, - vec!["/noise"], - std::time::Duration::from_secs(10), - ) - .await - .unwrap(); - - tokio::time::sleep(std::time::Duration::from_secs(60)).await; - }); - - let peer_id = PeerId::random(); - let address = Multiaddr::empty() - .with(Protocol::from(address.ip())) - .with(Protocol::Tcp(address.port())) - .with(Protocol::Ws(std::borrow::Cow::Borrowed("/"))) - .with(Protocol::P2p(peer_id.into())); - - let (url, peer) = WebSocketTransport::multiaddr_into_url(address.clone()).unwrap(); - let (_, stream) = WebSocketTransport::dial_peer( - address.clone(), - Default::default(), - Duration::from_secs(10), - false, - Arc::new(TokioResolver::builder_tokio().unwrap().build()), - ) - .await - .unwrap(); - - match WebSocketConnection::open_connection( - ConnectionId::from(0usize), - Keypair::generate(), - stream, - address.clone(), - peer, - url, - Default::default(), - 5, - 2, - Duration::from_secs(10), - ) - .await - { - Ok(_) => panic!("connection was supposed to fail"), - Err(NegotiationError::Timeout) => {} - Err(error) => panic!("invalid error: {error:?}"), - } - } - - #[tokio::test] - async fn yamux_not_supported_dialer() { - let _ = tracing_subscriber::fmt() - .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) - .try_init(); - - let listener = TcpListener::bind("[::1]:0").await.unwrap(); - let address = listener.local_addr().unwrap(); - - let (Ok(dialer), Ok((stream, dialer_address))) = - tokio::join!(TcpStream::connect(address), listener.accept(),) - else { - panic!("failed to establish connection"); - }; - - let peer_id = PeerId::random(); - let dialer_address = Multiaddr::empty() - .with(Protocol::from(dialer_address.ip())) - .with(Protocol::Tcp(dialer_address.port())) - .with(Protocol::Ws(std::borrow::Cow::Borrowed("/"))) - .with(Protocol::P2p(peer_id.into())); - - let (url, _peer) = WebSocketTransport::multiaddr_into_url(dialer_address.clone()).unwrap(); - - tokio::spawn(async move { - // Negotiate websocket. - let stream = tokio_tungstenite::client_async_tls(url, dialer).await.unwrap().0; - let dialer = BufferedStream::new(stream); - - let (stream, _proto) = WebSocketConnection::negotiate_protocol( - dialer, - &Role::Dialer, - vec!["/noise"], - std::time::Duration::from_secs(10), - ) - .await - .unwrap(); - - // do a noise handshake - let keypair = Keypair::generate(); - let (stream, _peer) = noise::handshake( - stream.inner(), - &keypair, - Role::Dialer, - 5, - 2, - std::time::Duration::from_secs(10), - noise::HandshakeTransport::WebSocket, - ) - .await - .unwrap(); - - assert!(WebSocketConnection::negotiate_protocol( - stream, - &Role::Dialer, - vec!["/unsupported/1"], - std::time::Duration::from_secs(10), - ) - .await - .is_err()); - }); - - match WebSocketConnection::accept_connection( - stream, - ConnectionId::from(0usize), - Keypair::generate(), - dialer_address, - Default::default(), - 5, - 2, - Duration::from_secs(10), - ) - .await - { - Ok(_) => panic!("connection was supposed to fail"), - Err(NegotiationError::MultistreamSelectError( - crate::multistream_select::NegotiationError::Failed, - )) => {} - Err(error) => panic!("{error:?}"), - } - } - - #[tokio::test] - async fn yamux_not_supported_listener() { - let _ = tracing_subscriber::fmt() - .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) - .try_init(); - - let listener = TcpListener::bind("[::1]:0").await.unwrap(); - let address = listener.local_addr().unwrap(); - - let keypair = Keypair::generate(); - let peer_id = PeerId::from_public_key(&keypair.public().into()); - - tokio::spawn(async move { - let (stream, _) = listener.accept().await.unwrap(); - let stream = tokio_tungstenite::accept_async(stream).await.unwrap(); - let stream = BufferedStream::new(stream); - - let (stream, _proto) = WebSocketConnection::negotiate_protocol( - stream, - &Role::Listener, - vec!["/noise"], - std::time::Duration::from_secs(10), - ) - .await - .unwrap(); - - // do a noise handshake - let (stream, _peer) = noise::handshake( - stream.inner(), - &keypair, - Role::Listener, - 5, - 2, - std::time::Duration::from_secs(10), - noise::HandshakeTransport::WebSocket, - ) - .await - .unwrap(); - - assert!(WebSocketConnection::negotiate_protocol( - stream, - &Role::Listener, - vec!["/unsupported/1"], - std::time::Duration::from_secs(10), - ) - .await - .is_err()); - }); - - let address = Multiaddr::empty() - .with(Protocol::from(address.ip())) - .with(Protocol::Tcp(address.port())) - .with(Protocol::Ws(std::borrow::Cow::Borrowed("/"))) - .with(Protocol::P2p(peer_id.into())); - - let (url, peer) = WebSocketTransport::multiaddr_into_url(address.clone()).unwrap(); - let (_, stream) = WebSocketTransport::dial_peer( - address.clone(), - Default::default(), - Duration::from_secs(10), - false, - Arc::new(TokioResolver::builder_tokio().unwrap().build()), - ) - .await - .unwrap(); - - match WebSocketConnection::open_connection( - ConnectionId::from(0usize), - Keypair::generate(), - stream, - address.clone(), - peer, - url, - Default::default(), - 5, - 2, - Duration::from_secs(10), - ) - .await - { - Ok(_) => panic!("connection was supposed to fail"), - Err(NegotiationError::MultistreamSelectError( - crate::multistream_select::NegotiationError::Failed, - )) => {} - Err(error) => panic!("invalid error: {error:?}"), - } - } - - #[tokio::test] - async fn yamux_timeout_dialer() { - let _ = tracing_subscriber::fmt() - .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) - .try_init(); - - let listener = TcpListener::bind("[::1]:0").await.unwrap(); - let address = listener.local_addr().unwrap(); - - let (Ok(dialer), Ok((stream, dialer_address))) = - tokio::join!(TcpStream::connect(address), listener.accept(),) - else { - panic!("failed to establish connection"); - }; - - let peer_id = PeerId::random(); - let dialer_address = Multiaddr::empty() - .with(Protocol::from(dialer_address.ip())) - .with(Protocol::Tcp(dialer_address.port())) - .with(Protocol::Ws(std::borrow::Cow::Borrowed("/"))) - .with(Protocol::P2p(peer_id.into())); - - let (url, _peer) = WebSocketTransport::multiaddr_into_url(dialer_address.clone()).unwrap(); - - tokio::spawn(async move { - // Negotiate websocket. - let stream = tokio_tungstenite::client_async_tls(url, dialer).await.unwrap().0; - let dialer = BufferedStream::new(stream); - - let (stream, _proto) = WebSocketConnection::negotiate_protocol( - dialer, - &Role::Dialer, - vec!["/noise"], - std::time::Duration::from_secs(10), - ) - .await - .unwrap(); - - // do a noise handshake - let keypair = Keypair::generate(); - let (_stream, _peer) = noise::handshake( - stream.inner(), - &keypair, - Role::Dialer, - 5, - 2, - std::time::Duration::from_secs(10), - noise::HandshakeTransport::WebSocket, - ) - .await - .unwrap(); - - tokio::time::sleep(std::time::Duration::from_secs(60)).await; - }); - - match WebSocketConnection::accept_connection( - stream, - ConnectionId::from(0usize), - Keypair::generate(), - dialer_address, - Default::default(), - 5, - 2, - Duration::from_secs(10), - ) - .await - { - Ok(_) => panic!("connection was supposed to fail"), - Err(NegotiationError::Timeout) => {} - Err(error) => panic!("{error:?}"), - } - } - - #[tokio::test] - async fn yamux_timeout_listener() { - let _ = tracing_subscriber::fmt() - .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) - .try_init(); - - let listener = TcpListener::bind("[::1]:0").await.unwrap(); - let address = listener.local_addr().unwrap(); - - let keypair = Keypair::generate(); - let peer_id = PeerId::from_public_key(&keypair.public().into()); - - tokio::spawn(async move { - let (stream, _) = listener.accept().await.unwrap(); - let stream = tokio_tungstenite::accept_async(stream).await.unwrap(); - let stream = BufferedStream::new(stream); - - let (stream, _proto) = WebSocketConnection::negotiate_protocol( - stream, - &Role::Listener, - vec!["/noise"], - std::time::Duration::from_secs(10), - ) - .await - .unwrap(); - - // do a noise handshake - let (_stream, _peer) = noise::handshake( - stream.inner(), - &keypair, - Role::Listener, - 5, - 2, - std::time::Duration::from_secs(10), - noise::HandshakeTransport::WebSocket, - ) - .await - .unwrap(); - - tokio::time::sleep(std::time::Duration::from_secs(60)).await; - }); - - let address = Multiaddr::empty() - .with(Protocol::from(address.ip())) - .with(Protocol::Tcp(address.port())) - .with(Protocol::Ws(std::borrow::Cow::Borrowed("/"))) - .with(Protocol::P2p(peer_id.into())); - - let (url, peer) = WebSocketTransport::multiaddr_into_url(address.clone()).unwrap(); - let (_, stream) = WebSocketTransport::dial_peer( - address.clone(), - Default::default(), - Duration::from_secs(10), - false, - Arc::new(TokioResolver::builder_tokio().unwrap().build()), - ) - .await - .unwrap(); - - match WebSocketConnection::open_connection( - ConnectionId::from(0usize), - Keypair::generate(), - stream, - address.clone(), - peer, - url, - Default::default(), - 5, - 2, - Duration::from_secs(10), - ) - .await - { - Ok(_) => panic!("connection was supposed to fail"), - Err(NegotiationError::Timeout) => {} - Err(error) => panic!("invalid error: {error:?}"), - } - } + use crate::transport::websocket::WebSocketTransport; + + use super::*; + use futures::AsyncWriteExt; + use hickory_resolver::TokioResolver; + use std::sync::Arc; + use tokio::net::TcpListener; + + #[tokio::test] + async fn multistream_select_not_supported_dialer() { + let _ = tracing_subscriber::fmt() + .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) + .try_init(); + + let listener = TcpListener::bind("[::1]:0").await.unwrap(); + let address = listener.local_addr().unwrap(); + + tokio::spawn(async move { + let (stream, _) = listener.accept().await.unwrap(); + // Negotiate websocket. + let stream = tokio_tungstenite::accept_async(stream).await.unwrap(); + let mut stream = BufferedStream::new(stream); + stream.write_all(&vec![0x12u8; 256]).await.unwrap(); + }); + + let peer_id = PeerId::random(); + let address = Multiaddr::empty() + .with(Protocol::from(address.ip())) + .with(Protocol::Tcp(address.port())) + .with(Protocol::Ws(std::borrow::Cow::Borrowed("/"))) + .with(Protocol::P2p(peer_id.into())); + + let (url, peer) = WebSocketTransport::multiaddr_into_url(address.clone()).unwrap(); + + let (_, stream) = WebSocketTransport::dial_peer( + address.clone(), + Default::default(), + Duration::from_secs(10), + false, + Arc::new(TokioResolver::builder_tokio().unwrap().build()), + ) + .await + .unwrap(); + + match WebSocketConnection::open_connection( + ConnectionId::from(0usize), + Keypair::generate(), + stream, + address.clone(), + peer, + url, + Default::default(), + 5, + 2, + Duration::from_secs(10), + ) + .await + { + Ok(_) => panic!("connection was supposed to fail"), + Err(NegotiationError::MultistreamSelectError( + crate::multistream_select::NegotiationError::ProtocolError(_), + )) => {}, + Err(error) => panic!("invalid error: {error:?}"), + } + } + + #[tokio::test] + async fn multistream_select_not_supported_listener() { + let _ = tracing_subscriber::fmt() + .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) + .try_init(); + + let listener = TcpListener::bind("[::1]:0").await.unwrap(); + let address = listener.local_addr().unwrap(); + + let (Ok(dialer), Ok((stream, dialer_address))) = + tokio::join!(TcpStream::connect(address), listener.accept(),) + else { + panic!("failed to establish connection"); + }; + + let peer_id = PeerId::random(); + let dialer_address = Multiaddr::empty() + .with(Protocol::from(dialer_address.ip())) + .with(Protocol::Tcp(dialer_address.port())) + .with(Protocol::Ws(std::borrow::Cow::Borrowed("/"))) + .with(Protocol::P2p(peer_id.into())); + + let (url, _peer) = WebSocketTransport::multiaddr_into_url(dialer_address.clone()).unwrap(); + + tokio::spawn(async move { + // Negotiate websocket. + let stream = tokio_tungstenite::client_async_tls(url, dialer).await.unwrap().0; + let mut dialer = BufferedStream::new(stream); + let _ = dialer.write_all(&vec![0x12u8; 256]).await; + }); + + match WebSocketConnection::accept_connection( + stream, + ConnectionId::from(0usize), + Keypair::generate(), + dialer_address, + Default::default(), + 5, + 2, + Duration::from_secs(10), + ) + .await + { + Ok(_) => panic!("connection was supposed to fail"), + Err(NegotiationError::MultistreamSelectError( + crate::multistream_select::NegotiationError::ProtocolError(_), + )) => {}, + Err(error) => panic!("invalid error: {error:?}"), + } + } + + #[tokio::test] + async fn noise_not_supported_dialer() { + let _ = tracing_subscriber::fmt() + .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) + .try_init(); + + let listener = TcpListener::bind("[::1]:0").await.unwrap(); + let address = listener.local_addr().unwrap(); + + tokio::spawn(async move { + let (stream, _) = listener.accept().await.unwrap(); + let stream = tokio_tungstenite::accept_async(stream).await.unwrap(); + let stream = BufferedStream::new(stream); + + // attempt to negotiate yamux, skipping noise entirely + assert!(WebSocketConnection::negotiate_protocol( + stream, + &Role::Listener, + vec!["/yamux/1.0.0"], + std::time::Duration::from_secs(10), + ) + .await + .is_err()); + }); + + let peer_id = PeerId::random(); + let address = Multiaddr::empty() + .with(Protocol::from(address.ip())) + .with(Protocol::Tcp(address.port())) + .with(Protocol::Ws(std::borrow::Cow::Borrowed("/"))) + .with(Protocol::P2p(peer_id.into())); + + let (url, peer) = WebSocketTransport::multiaddr_into_url(address.clone()).unwrap(); + let (_, stream) = WebSocketTransport::dial_peer( + address.clone(), + Default::default(), + Duration::from_secs(10), + false, + Arc::new(TokioResolver::builder_tokio().unwrap().build()), + ) + .await + .unwrap(); + + match WebSocketConnection::open_connection( + ConnectionId::from(0usize), + Keypair::generate(), + stream, + address.clone(), + peer, + url, + Default::default(), + 5, + 2, + Duration::from_secs(10), + ) + .await + { + Ok(_) => panic!("connection was supposed to fail"), + Err(NegotiationError::MultistreamSelectError( + crate::multistream_select::NegotiationError::Failed, + )) => {}, + Err(error) => panic!("invalid error: {error:?}"), + } + } + + #[tokio::test] + async fn noise_not_supported_listener() { + let _ = tracing_subscriber::fmt() + .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) + .try_init(); + + let listener = TcpListener::bind("[::1]:0").await.unwrap(); + let address = listener.local_addr().unwrap(); + + let (Ok(dialer), Ok((stream, dialer_address))) = + tokio::join!(TcpStream::connect(address), listener.accept(),) + else { + panic!("failed to establish connection"); + }; + + let peer_id = PeerId::random(); + let dialer_address = Multiaddr::empty() + .with(Protocol::from(dialer_address.ip())) + .with(Protocol::Tcp(dialer_address.port())) + .with(Protocol::Ws(std::borrow::Cow::Borrowed("/"))) + .with(Protocol::P2p(peer_id.into())); + + let (url, _peer) = WebSocketTransport::multiaddr_into_url(dialer_address.clone()).unwrap(); + + tokio::spawn(async move { + // Negotiate websocket. + let stream = tokio_tungstenite::client_async_tls(url, dialer).await.unwrap().0; + let dialer = BufferedStream::new(stream); + + // attempt to negotiate yamux, skipping noise entirely + assert!(WebSocketConnection::negotiate_protocol( + dialer, + &Role::Dialer, + vec!["/yamux/1.0.0"], + std::time::Duration::from_secs(10), + ) + .await + .is_err()); + }); + + match WebSocketConnection::accept_connection( + stream, + ConnectionId::from(0usize), + Keypair::generate(), + dialer_address, + Default::default(), + 5, + 2, + Duration::from_secs(10), + ) + .await + { + Ok(_) => panic!("connection was supposed to fail"), + Err(NegotiationError::MultistreamSelectError( + crate::multistream_select::NegotiationError::Failed, + )) => {}, + Err(error) => panic!("invalid error: {error:?}"), + } + } + + #[tokio::test] + async fn noise_timeout_listener() { + let _ = tracing_subscriber::fmt() + .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) + .try_init(); + + let listener = TcpListener::bind("[::1]:0").await.unwrap(); + let address = listener.local_addr().unwrap(); + + let (Ok(dialer), Ok((stream, dialer_address))) = + tokio::join!(TcpStream::connect(address), listener.accept(),) + else { + panic!("failed to establish connection"); + }; + + let keypair = Keypair::generate(); + let peer_id = PeerId::from_public_key(&keypair.public().into()); + + let dialer_address = Multiaddr::empty() + .with(Protocol::from(dialer_address.ip())) + .with(Protocol::Tcp(dialer_address.port())) + .with(Protocol::Ws(std::borrow::Cow::Borrowed("/"))) + .with(Protocol::P2p(peer_id.into())); + + let (url, _peer) = WebSocketTransport::multiaddr_into_url(dialer_address.clone()).unwrap(); + + tokio::spawn(async move { + // Negotiate websocket. + let stream = tokio_tungstenite::client_async_tls(url, dialer).await.unwrap().0; + let dialer = BufferedStream::new(stream); + + // Sleep while negotiating /yamux. + let (stream, _proto) = WebSocketConnection::negotiate_protocol( + dialer, + &Role::Dialer, + vec!["/noise"], + std::time::Duration::from_secs(10), + ) + .await + .unwrap(); + + let (_stream, _peer) = noise::handshake( + stream.inner(), + &keypair, + Role::Dialer, + 5, + 2, + std::time::Duration::from_secs(10), + noise::HandshakeTransport::WebSocket, + ) + .await + .unwrap(); + + tokio::time::sleep(std::time::Duration::from_secs(60)).await; + }); + + match WebSocketConnection::accept_connection( + stream, + ConnectionId::from(0usize), + Keypair::generate(), + dialer_address, + Default::default(), + 5, + 2, + Duration::from_secs(10), + ) + .await + { + Ok(_) => panic!("connection was supposed to fail"), + Err(NegotiationError::Timeout) => {}, + Err(error) => panic!("invalid error: {error:?}"), + } + } + + #[tokio::test] + async fn noise_wrong_handshake_listener() { + let _ = tracing_subscriber::fmt() + .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) + .try_init(); + + let listener = TcpListener::bind("[::1]:0").await.unwrap(); + let address = listener.local_addr().unwrap(); + + let (Ok(dialer), Ok((stream, dialer_address))) = + tokio::join!(TcpStream::connect(address), listener.accept(),) + else { + panic!("failed to establish connection"); + }; + + let peer_id = PeerId::random(); + + let dialer_address = Multiaddr::empty() + .with(Protocol::from(dialer_address.ip())) + .with(Protocol::Tcp(dialer_address.port())) + .with(Protocol::Ws(std::borrow::Cow::Borrowed("/"))) + .with(Protocol::P2p(peer_id.into())); + + let (url, _peer) = WebSocketTransport::multiaddr_into_url(dialer_address.clone()).unwrap(); + + tokio::spawn(async move { + // Negotiate websocket. + let stream = tokio_tungstenite::client_async_tls(url, dialer).await.unwrap().0; + let dialer = BufferedStream::new(stream); + + // Sleep while negotiating /yamux. + let (stream, _proto) = WebSocketConnection::negotiate_protocol( + dialer, + &Role::Dialer, + vec!["/noise"], + std::time::Duration::from_secs(10), + ) + .await + .unwrap(); + + // The next step is providing the noise handshake. However, we jump + // directly to negotiating yamux. + let (_stream, _proto) = WebSocketConnection::negotiate_protocol( + stream, + &Role::Dialer, + vec!["/yamux/1.0.0"], + std::time::Duration::from_secs(10), + ) + .await + .unwrap(); + + tokio::time::sleep(std::time::Duration::from_secs(60)).await; + }); + + match WebSocketConnection::accept_connection( + stream, + ConnectionId::from(0usize), + Keypair::generate(), + dialer_address, + Default::default(), + 5, + 2, + Duration::from_secs(10), + ) + .await + { + Ok(_) => panic!("connection was supposed to fail"), + Err(NegotiationError::Timeout) => {}, + Err(error) => panic!("invalid error: {error:?}"), + } + } + + #[tokio::test] + async fn noise_timeout_dialer() { + let _ = tracing_subscriber::fmt() + .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) + .try_init(); + + let listener = TcpListener::bind("[::1]:0").await.unwrap(); + let address = listener.local_addr().unwrap(); + + tokio::spawn(async move { + let (stream, _) = listener.accept().await.unwrap(); + let stream = tokio_tungstenite::accept_async(stream).await.unwrap(); + let stream = BufferedStream::new(stream); + + let (_stream, _proto) = WebSocketConnection::negotiate_protocol( + stream, + &Role::Listener, + vec!["/noise"], + std::time::Duration::from_secs(10), + ) + .await + .unwrap(); + + tokio::time::sleep(std::time::Duration::from_secs(60)).await; + }); + + let peer_id = PeerId::random(); + let address = Multiaddr::empty() + .with(Protocol::from(address.ip())) + .with(Protocol::Tcp(address.port())) + .with(Protocol::Ws(std::borrow::Cow::Borrowed("/"))) + .with(Protocol::P2p(peer_id.into())); + + let (url, peer) = WebSocketTransport::multiaddr_into_url(address.clone()).unwrap(); + let (_, stream) = WebSocketTransport::dial_peer( + address.clone(), + Default::default(), + Duration::from_secs(10), + false, + Arc::new(TokioResolver::builder_tokio().unwrap().build()), + ) + .await + .unwrap(); + + match WebSocketConnection::open_connection( + ConnectionId::from(0usize), + Keypair::generate(), + stream, + address.clone(), + peer, + url, + Default::default(), + 5, + 2, + Duration::from_secs(10), + ) + .await + { + Ok(_) => panic!("connection was supposed to fail"), + Err(NegotiationError::Timeout) => {}, + Err(error) => panic!("invalid error: {error:?}"), + } + } + + #[tokio::test] + async fn yamux_not_supported_dialer() { + let _ = tracing_subscriber::fmt() + .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) + .try_init(); + + let listener = TcpListener::bind("[::1]:0").await.unwrap(); + let address = listener.local_addr().unwrap(); + + let (Ok(dialer), Ok((stream, dialer_address))) = + tokio::join!(TcpStream::connect(address), listener.accept(),) + else { + panic!("failed to establish connection"); + }; + + let peer_id = PeerId::random(); + let dialer_address = Multiaddr::empty() + .with(Protocol::from(dialer_address.ip())) + .with(Protocol::Tcp(dialer_address.port())) + .with(Protocol::Ws(std::borrow::Cow::Borrowed("/"))) + .with(Protocol::P2p(peer_id.into())); + + let (url, _peer) = WebSocketTransport::multiaddr_into_url(dialer_address.clone()).unwrap(); + + tokio::spawn(async move { + // Negotiate websocket. + let stream = tokio_tungstenite::client_async_tls(url, dialer).await.unwrap().0; + let dialer = BufferedStream::new(stream); + + let (stream, _proto) = WebSocketConnection::negotiate_protocol( + dialer, + &Role::Dialer, + vec!["/noise"], + std::time::Duration::from_secs(10), + ) + .await + .unwrap(); + + // do a noise handshake + let keypair = Keypair::generate(); + let (stream, _peer) = noise::handshake( + stream.inner(), + &keypair, + Role::Dialer, + 5, + 2, + std::time::Duration::from_secs(10), + noise::HandshakeTransport::WebSocket, + ) + .await + .unwrap(); + + assert!(WebSocketConnection::negotiate_protocol( + stream, + &Role::Dialer, + vec!["/unsupported/1"], + std::time::Duration::from_secs(10), + ) + .await + .is_err()); + }); + + match WebSocketConnection::accept_connection( + stream, + ConnectionId::from(0usize), + Keypair::generate(), + dialer_address, + Default::default(), + 5, + 2, + Duration::from_secs(10), + ) + .await + { + Ok(_) => panic!("connection was supposed to fail"), + Err(NegotiationError::MultistreamSelectError( + crate::multistream_select::NegotiationError::Failed, + )) => {}, + Err(error) => panic!("{error:?}"), + } + } + + #[tokio::test] + async fn yamux_not_supported_listener() { + let _ = tracing_subscriber::fmt() + .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) + .try_init(); + + let listener = TcpListener::bind("[::1]:0").await.unwrap(); + let address = listener.local_addr().unwrap(); + + let keypair = Keypair::generate(); + let peer_id = PeerId::from_public_key(&keypair.public().into()); + + tokio::spawn(async move { + let (stream, _) = listener.accept().await.unwrap(); + let stream = tokio_tungstenite::accept_async(stream).await.unwrap(); + let stream = BufferedStream::new(stream); + + let (stream, _proto) = WebSocketConnection::negotiate_protocol( + stream, + &Role::Listener, + vec!["/noise"], + std::time::Duration::from_secs(10), + ) + .await + .unwrap(); + + // do a noise handshake + let (stream, _peer) = noise::handshake( + stream.inner(), + &keypair, + Role::Listener, + 5, + 2, + std::time::Duration::from_secs(10), + noise::HandshakeTransport::WebSocket, + ) + .await + .unwrap(); + + assert!(WebSocketConnection::negotiate_protocol( + stream, + &Role::Listener, + vec!["/unsupported/1"], + std::time::Duration::from_secs(10), + ) + .await + .is_err()); + }); + + let address = Multiaddr::empty() + .with(Protocol::from(address.ip())) + .with(Protocol::Tcp(address.port())) + .with(Protocol::Ws(std::borrow::Cow::Borrowed("/"))) + .with(Protocol::P2p(peer_id.into())); + + let (url, peer) = WebSocketTransport::multiaddr_into_url(address.clone()).unwrap(); + let (_, stream) = WebSocketTransport::dial_peer( + address.clone(), + Default::default(), + Duration::from_secs(10), + false, + Arc::new(TokioResolver::builder_tokio().unwrap().build()), + ) + .await + .unwrap(); + + match WebSocketConnection::open_connection( + ConnectionId::from(0usize), + Keypair::generate(), + stream, + address.clone(), + peer, + url, + Default::default(), + 5, + 2, + Duration::from_secs(10), + ) + .await + { + Ok(_) => panic!("connection was supposed to fail"), + Err(NegotiationError::MultistreamSelectError( + crate::multistream_select::NegotiationError::Failed, + )) => {}, + Err(error) => panic!("invalid error: {error:?}"), + } + } + + #[tokio::test] + async fn yamux_timeout_dialer() { + let _ = tracing_subscriber::fmt() + .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) + .try_init(); + + let listener = TcpListener::bind("[::1]:0").await.unwrap(); + let address = listener.local_addr().unwrap(); + + let (Ok(dialer), Ok((stream, dialer_address))) = + tokio::join!(TcpStream::connect(address), listener.accept(),) + else { + panic!("failed to establish connection"); + }; + + let peer_id = PeerId::random(); + let dialer_address = Multiaddr::empty() + .with(Protocol::from(dialer_address.ip())) + .with(Protocol::Tcp(dialer_address.port())) + .with(Protocol::Ws(std::borrow::Cow::Borrowed("/"))) + .with(Protocol::P2p(peer_id.into())); + + let (url, _peer) = WebSocketTransport::multiaddr_into_url(dialer_address.clone()).unwrap(); + + tokio::spawn(async move { + // Negotiate websocket. + let stream = tokio_tungstenite::client_async_tls(url, dialer).await.unwrap().0; + let dialer = BufferedStream::new(stream); + + let (stream, _proto) = WebSocketConnection::negotiate_protocol( + dialer, + &Role::Dialer, + vec!["/noise"], + std::time::Duration::from_secs(10), + ) + .await + .unwrap(); + + // do a noise handshake + let keypair = Keypair::generate(); + let (_stream, _peer) = noise::handshake( + stream.inner(), + &keypair, + Role::Dialer, + 5, + 2, + std::time::Duration::from_secs(10), + noise::HandshakeTransport::WebSocket, + ) + .await + .unwrap(); + + tokio::time::sleep(std::time::Duration::from_secs(60)).await; + }); + + match WebSocketConnection::accept_connection( + stream, + ConnectionId::from(0usize), + Keypair::generate(), + dialer_address, + Default::default(), + 5, + 2, + Duration::from_secs(10), + ) + .await + { + Ok(_) => panic!("connection was supposed to fail"), + Err(NegotiationError::Timeout) => {}, + Err(error) => panic!("{error:?}"), + } + } + + #[tokio::test] + async fn yamux_timeout_listener() { + let _ = tracing_subscriber::fmt() + .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) + .try_init(); + + let listener = TcpListener::bind("[::1]:0").await.unwrap(); + let address = listener.local_addr().unwrap(); + + let keypair = Keypair::generate(); + let peer_id = PeerId::from_public_key(&keypair.public().into()); + + tokio::spawn(async move { + let (stream, _) = listener.accept().await.unwrap(); + let stream = tokio_tungstenite::accept_async(stream).await.unwrap(); + let stream = BufferedStream::new(stream); + + let (stream, _proto) = WebSocketConnection::negotiate_protocol( + stream, + &Role::Listener, + vec!["/noise"], + std::time::Duration::from_secs(10), + ) + .await + .unwrap(); + + // do a noise handshake + let (_stream, _peer) = noise::handshake( + stream.inner(), + &keypair, + Role::Listener, + 5, + 2, + std::time::Duration::from_secs(10), + noise::HandshakeTransport::WebSocket, + ) + .await + .unwrap(); + + tokio::time::sleep(std::time::Duration::from_secs(60)).await; + }); + + let address = Multiaddr::empty() + .with(Protocol::from(address.ip())) + .with(Protocol::Tcp(address.port())) + .with(Protocol::Ws(std::borrow::Cow::Borrowed("/"))) + .with(Protocol::P2p(peer_id.into())); + + let (url, peer) = WebSocketTransport::multiaddr_into_url(address.clone()).unwrap(); + let (_, stream) = WebSocketTransport::dial_peer( + address.clone(), + Default::default(), + Duration::from_secs(10), + false, + Arc::new(TokioResolver::builder_tokio().unwrap().build()), + ) + .await + .unwrap(); + + match WebSocketConnection::open_connection( + ConnectionId::from(0usize), + Keypair::generate(), + stream, + address.clone(), + peer, + url, + Default::default(), + 5, + 2, + Duration::from_secs(10), + ) + .await + { + Ok(_) => panic!("connection was supposed to fail"), + Err(NegotiationError::Timeout) => {}, + Err(error) => panic!("invalid error: {error:?}"), + } + } } diff --git a/client/litep2p/src/transport/websocket/mod.rs b/client/litep2p/src/transport/websocket/mod.rs index a6bf4522..d5550950 100644 --- a/client/litep2p/src/transport/websocket/mod.rs +++ b/client/litep2p/src/transport/websocket/mod.rs @@ -21,19 +21,19 @@ //! WebSocket transport. use crate::{ - error::{AddressError, Error, NegotiationError}, - transport::{ - common::listener::{DialAddresses, GetSocketAddr, SocketListener, WebSocketAddress}, - manager::TransportHandle, - websocket::{ - config::Config, - connection::{NegotiatedConnection, WebSocketConnection}, - }, - Transport, TransportBuilder, TransportEvent, DIAL_DEADLINE_MULTIPLIER, - }, - types::ConnectionId, - utils::futures_stream::FuturesStream, - DialError, PeerId, + error::{AddressError, Error, NegotiationError}, + transport::{ + common::listener::{DialAddresses, GetSocketAddr, SocketListener, WebSocketAddress}, + manager::TransportHandle, + websocket::{ + config::Config, + connection::{NegotiatedConnection, WebSocketConnection}, + }, + Transport, TransportBuilder, TransportEvent, DIAL_DEADLINE_MULTIPLIER, + }, + types::ConnectionId, + utils::futures_stream::FuturesStream, + DialError, PeerId, }; use futures::{future::BoxFuture, stream::AbortHandle, Stream, StreamExt, TryFutureExt}; @@ -47,10 +47,10 @@ use tokio_tungstenite::{MaybeTlsStream, WebSocketStream}; use url::Url; use std::{ - collections::HashMap, - pin::Pin, - task::{Context, Poll}, - time::Duration, + collections::HashMap, + pin::Pin, + task::{Context, Poll}, + time::Duration, }; pub(crate) use substream::Substream; @@ -66,701 +66,685 @@ const LOG_TARGET: &str = "litep2p::websocket"; /// Pending inbound connection. struct PendingInboundConnection { - /// Socket address of the remote peer. - connection: TcpStream, - /// Address of the remote peer. - address: SocketAddr, + /// Socket address of the remote peer. + connection: TcpStream, + /// Address of the remote peer. + address: SocketAddr, } #[derive(Debug)] enum RawConnectionResult { - /// The first successful connection. - Connected { - negotiated: NegotiatedConnection, - errors: Vec<(Multiaddr, DialError)>, - }, - - /// All connection attempts failed. - Failed { - connection_id: ConnectionId, - errors: Vec<(Multiaddr, DialError)>, - }, - - /// Future was canceled. - Canceled { connection_id: ConnectionId }, + /// The first successful connection. + Connected { negotiated: NegotiatedConnection, errors: Vec<(Multiaddr, DialError)> }, + + /// All connection attempts failed. + Failed { connection_id: ConnectionId, errors: Vec<(Multiaddr, DialError)> }, + + /// Future was canceled. + Canceled { connection_id: ConnectionId }, } /// WebSocket transport. pub(crate) struct WebSocketTransport { - /// Transport context. - context: TransportHandle, + /// Transport context. + context: TransportHandle, - /// Transport configuration. - config: Config, + /// Transport configuration. + config: Config, - /// WebSocket listener. - listener: SocketListener, + /// WebSocket listener. + listener: SocketListener, - /// Dial addresses. - dial_addresses: DialAddresses, + /// Dial addresses. + dial_addresses: DialAddresses, - /// Pending dials. - pending_dials: HashMap, + /// Pending dials. + pending_dials: HashMap, - /// Pending inbound connections. - pending_inbound_connections: HashMap, + /// Pending inbound connections. + pending_inbound_connections: HashMap, - /// Pending connections. - pending_connections: - FuturesStream>>, + /// Pending connections. + pending_connections: + FuturesStream>>, - /// Pending raw, unnegotiated connections. - pending_raw_connections: FuturesStream>, + /// Pending raw, unnegotiated connections. + pending_raw_connections: FuturesStream>, - /// Opened raw connection, waiting for approval/rejection from `TransportManager`. - opened: HashMap, + /// Opened raw connection, waiting for approval/rejection from `TransportManager`. + opened: HashMap, - /// Cancel raw connections futures. - /// - /// This is cancelling `Self::pending_raw_connections`. - cancel_futures: HashMap, + /// Cancel raw connections futures. + /// + /// This is cancelling `Self::pending_raw_connections`. + cancel_futures: HashMap, - /// Negotiated connections waiting validation. - pending_open: HashMap, + /// Negotiated connections waiting validation. + pending_open: HashMap, - /// DNS resolver. - resolver: Arc, + /// DNS resolver. + resolver: Arc, } impl WebSocketTransport { - /// Handle inbound connection. - fn on_inbound_connection( - &mut self, - connection_id: ConnectionId, - connection: TcpStream, - address: SocketAddr, - ) { - let keypair = self.context.keypair.clone(); - let yamux_config = self.config.yamux_config.clone(); - let connection_open_timeout = self.config.connection_open_timeout; - let max_read_ahead_factor = self.config.noise_read_ahead_frame_count; - let max_write_buffer_size = self.config.noise_write_buffer_size; - let substream_open_timeout = self.config.substream_open_timeout; - let address = Multiaddr::empty() - .with(Protocol::from(address.ip())) - .with(Protocol::Tcp(address.port())) - .with(Protocol::Ws(std::borrow::Cow::Borrowed("/"))); - - self.pending_connections.push(Box::pin(async move { - match tokio::time::timeout(connection_open_timeout, async move { - WebSocketConnection::accept_connection( - connection, - connection_id, - keypair, - address, - yamux_config, - max_read_ahead_factor, - max_write_buffer_size, - substream_open_timeout, - ) - .await - .map_err(|error| (connection_id, error.into())) - }) - .await - { - Err(_) => Err((connection_id, DialError::Timeout)), - Ok(Err(error)) => Err(error), - Ok(Ok(result)) => Ok(result), - } - })); - } - - /// Convert `Multiaddr` into `url::Url` - fn multiaddr_into_url(address: Multiaddr) -> Result<(Url, PeerId), AddressError> { - let mut protocol_stack = address.iter(); - - let dial_address = match protocol_stack.next().ok_or(AddressError::InvalidProtocol)? { - Protocol::Ip4(address) => address.to_string(), - Protocol::Ip6(address) => format!("[{address}]"), - Protocol::Dns(address) | Protocol::Dns4(address) | Protocol::Dns6(address) => - address.to_string(), - - _ => return Err(AddressError::InvalidProtocol), - }; - - let url = match protocol_stack.next().ok_or(AddressError::InvalidProtocol)? { - Protocol::Tcp(port) => match protocol_stack.next() { - Some(Protocol::Ws(_)) => format!("ws://{dial_address}:{port}/"), - Some(Protocol::Wss(_)) => format!("wss://{dial_address}:{port}/"), - _ => return Err(AddressError::InvalidProtocol), - }, - _ => return Err(AddressError::InvalidProtocol), - }; - - let peer = match protocol_stack.next() { - Some(Protocol::P2p(multihash)) => PeerId::from_multihash(multihash)?, - protocol => { - tracing::warn!( - target: LOG_TARGET, - ?protocol, - "invalid protocol, expected `Protocol::Ws`/`Protocol::Wss`", - ); - return Err(AddressError::PeerIdMissing); - } - }; - - tracing::trace!(target: LOG_TARGET, ?url, "parse address"); - - url::Url::parse(&url) - .map(|url| (url, peer)) - .map_err(|_| AddressError::InvalidUrl) - } - - /// Dial remote peer over `address`. - async fn dial_peer( - address: Multiaddr, - dial_addresses: DialAddresses, - connection_open_timeout: Duration, - nodelay: bool, - resolver: Arc, - ) -> Result<(Multiaddr, WebSocketStream>), DialError> { - let (url, _) = Self::multiaddr_into_url(address.clone())?; - - let (socket_address, _) = WebSocketAddress::multiaddr_to_socket_address(&address)?; - let remote_address = - match tokio::time::timeout(connection_open_timeout, socket_address.lookup_ip(resolver)) - .await - { - Err(_) => return Err(DialError::Timeout), - Ok(Err(error)) => return Err(error.into()), - Ok(Ok(address)) => address, - }; - - let domain = match remote_address.is_ipv4() { - true => Domain::IPV4, - false => Domain::IPV6, - }; - let socket = Socket::new(domain, Type::STREAM, Some(socket2::Protocol::TCP))?; - if remote_address.is_ipv6() { - socket.set_only_v6(true)?; - } - socket.set_nonblocking(true)?; - socket.set_nodelay(nodelay)?; - - match dial_addresses.local_dial_address(&remote_address.ip()) { - Ok(Some(dial_address)) => { - socket.set_reuse_address(true)?; - #[cfg(unix)] - socket.set_reuse_port(true)?; - socket.bind(&dial_address.into())?; - } - Ok(None) => {} - Err(()) => { - tracing::debug!( - target: LOG_TARGET, - ?remote_address, - "tcp listener not enabled for remote address, using ephemeral port", - ); - } - } - - let future = async move { - match socket.connect(&remote_address.into()) { - Ok(()) => {} - Err(error) if error.raw_os_error() == Some(libc::EINPROGRESS) => {} - Err(error) if error.kind() == std::io::ErrorKind::WouldBlock => {} - Err(err) => return Err(DialError::from(err)), - } - - let stream = TcpStream::try_from(Into::::into(socket))?; - stream.writable().await?; - if let Some(e) = stream.take_error()? { - return Err(DialError::from(e)); - } - - Ok(( - address, - tokio_tungstenite::client_async_tls(url, stream) - .await - .map_err(NegotiationError::WebSocket)? - .0, - )) - }; - - match tokio::time::timeout(connection_open_timeout, future).await { - Err(_) => Err(DialError::Timeout), - Ok(Err(error)) => Err(error), - Ok(Ok((address, stream))) => Ok((address, stream)), - } - } + /// Handle inbound connection. + fn on_inbound_connection( + &mut self, + connection_id: ConnectionId, + connection: TcpStream, + address: SocketAddr, + ) { + let keypair = self.context.keypair.clone(); + let yamux_config = self.config.yamux_config.clone(); + let connection_open_timeout = self.config.connection_open_timeout; + let max_read_ahead_factor = self.config.noise_read_ahead_frame_count; + let max_write_buffer_size = self.config.noise_write_buffer_size; + let substream_open_timeout = self.config.substream_open_timeout; + let address = Multiaddr::empty() + .with(Protocol::from(address.ip())) + .with(Protocol::Tcp(address.port())) + .with(Protocol::Ws(std::borrow::Cow::Borrowed("/"))); + + self.pending_connections.push(Box::pin(async move { + match tokio::time::timeout(connection_open_timeout, async move { + WebSocketConnection::accept_connection( + connection, + connection_id, + keypair, + address, + yamux_config, + max_read_ahead_factor, + max_write_buffer_size, + substream_open_timeout, + ) + .await + .map_err(|error| (connection_id, error.into())) + }) + .await + { + Err(_) => Err((connection_id, DialError::Timeout)), + Ok(Err(error)) => Err(error), + Ok(Ok(result)) => Ok(result), + } + })); + } + + /// Convert `Multiaddr` into `url::Url` + fn multiaddr_into_url(address: Multiaddr) -> Result<(Url, PeerId), AddressError> { + let mut protocol_stack = address.iter(); + + let dial_address = match protocol_stack.next().ok_or(AddressError::InvalidProtocol)? { + Protocol::Ip4(address) => address.to_string(), + Protocol::Ip6(address) => format!("[{address}]"), + Protocol::Dns(address) | Protocol::Dns4(address) | Protocol::Dns6(address) => + address.to_string(), + + _ => return Err(AddressError::InvalidProtocol), + }; + + let url = match protocol_stack.next().ok_or(AddressError::InvalidProtocol)? { + Protocol::Tcp(port) => match protocol_stack.next() { + Some(Protocol::Ws(_)) => format!("ws://{dial_address}:{port}/"), + Some(Protocol::Wss(_)) => format!("wss://{dial_address}:{port}/"), + _ => return Err(AddressError::InvalidProtocol), + }, + _ => return Err(AddressError::InvalidProtocol), + }; + + let peer = match protocol_stack.next() { + Some(Protocol::P2p(multihash)) => PeerId::from_multihash(multihash)?, + protocol => { + tracing::warn!( + target: LOG_TARGET, + ?protocol, + "invalid protocol, expected `Protocol::Ws`/`Protocol::Wss`", + ); + return Err(AddressError::PeerIdMissing); + }, + }; + + tracing::trace!(target: LOG_TARGET, ?url, "parse address"); + + url::Url::parse(&url) + .map(|url| (url, peer)) + .map_err(|_| AddressError::InvalidUrl) + } + + /// Dial remote peer over `address`. + async fn dial_peer( + address: Multiaddr, + dial_addresses: DialAddresses, + connection_open_timeout: Duration, + nodelay: bool, + resolver: Arc, + ) -> Result<(Multiaddr, WebSocketStream>), DialError> { + let (url, _) = Self::multiaddr_into_url(address.clone())?; + + let (socket_address, _) = WebSocketAddress::multiaddr_to_socket_address(&address)?; + let remote_address = + match tokio::time::timeout(connection_open_timeout, socket_address.lookup_ip(resolver)) + .await + { + Err(_) => return Err(DialError::Timeout), + Ok(Err(error)) => return Err(error.into()), + Ok(Ok(address)) => address, + }; + + let domain = match remote_address.is_ipv4() { + true => Domain::IPV4, + false => Domain::IPV6, + }; + let socket = Socket::new(domain, Type::STREAM, Some(socket2::Protocol::TCP))?; + if remote_address.is_ipv6() { + socket.set_only_v6(true)?; + } + socket.set_nonblocking(true)?; + socket.set_nodelay(nodelay)?; + + match dial_addresses.local_dial_address(&remote_address.ip()) { + Ok(Some(dial_address)) => { + socket.set_reuse_address(true)?; + #[cfg(unix)] + socket.set_reuse_port(true)?; + socket.bind(&dial_address.into())?; + }, + Ok(None) => {}, + Err(()) => { + tracing::debug!( + target: LOG_TARGET, + ?remote_address, + "tcp listener not enabled for remote address, using ephemeral port", + ); + }, + } + + let future = async move { + match socket.connect(&remote_address.into()) { + Ok(()) => {}, + Err(error) if error.raw_os_error() == Some(libc::EINPROGRESS) => {}, + Err(error) if error.kind() == std::io::ErrorKind::WouldBlock => {}, + Err(err) => return Err(DialError::from(err)), + } + + let stream = TcpStream::try_from(Into::::into(socket))?; + stream.writable().await?; + if let Some(e) = stream.take_error()? { + return Err(DialError::from(e)); + } + + Ok(( + address, + tokio_tungstenite::client_async_tls(url, stream) + .await + .map_err(NegotiationError::WebSocket)? + .0, + )) + }; + + match tokio::time::timeout(connection_open_timeout, future).await { + Err(_) => Err(DialError::Timeout), + Ok(Err(error)) => Err(error), + Ok(Ok((address, stream))) => Ok((address, stream)), + } + } } impl TransportBuilder for WebSocketTransport { - type Config = Config; - type Transport = WebSocketTransport; - - /// Create new [`Transport`] object. - fn new( - context: TransportHandle, - mut config: Self::Config, - resolver: Arc, - ) -> crate::Result<(Self, Vec)> - where - Self: Sized, - { - tracing::debug!( - target: LOG_TARGET, - listen_addresses = ?config.listen_addresses, - "start websocket transport", - ); - let (listener, listen_addresses, dial_addresses) = SocketListener::new::( - std::mem::take(&mut config.listen_addresses), - config.reuse_port, - config.nodelay, - ); - - Ok(( - Self { - listener, - config, - context, - dial_addresses, - opened: HashMap::new(), - pending_open: HashMap::new(), - pending_dials: HashMap::new(), - pending_inbound_connections: HashMap::new(), - pending_connections: FuturesStream::new(), - pending_raw_connections: FuturesStream::new(), - cancel_futures: HashMap::new(), - resolver, - }, - listen_addresses, - )) - } + type Config = Config; + type Transport = WebSocketTransport; + + /// Create new [`Transport`] object. + fn new( + context: TransportHandle, + mut config: Self::Config, + resolver: Arc, + ) -> crate::Result<(Self, Vec)> + where + Self: Sized, + { + tracing::debug!( + target: LOG_TARGET, + listen_addresses = ?config.listen_addresses, + "start websocket transport", + ); + let (listener, listen_addresses, dial_addresses) = SocketListener::new::( + std::mem::take(&mut config.listen_addresses), + config.reuse_port, + config.nodelay, + ); + + Ok(( + Self { + listener, + config, + context, + dial_addresses, + opened: HashMap::new(), + pending_open: HashMap::new(), + pending_dials: HashMap::new(), + pending_inbound_connections: HashMap::new(), + pending_connections: FuturesStream::new(), + pending_raw_connections: FuturesStream::new(), + cancel_futures: HashMap::new(), + resolver, + }, + listen_addresses, + )) + } } impl Transport for WebSocketTransport { - fn dial(&mut self, connection_id: ConnectionId, address: Multiaddr) -> crate::Result<()> { - let yamux_config = self.config.yamux_config.clone(); - let keypair = self.context.keypair.clone(); - let (ws_address, peer) = Self::multiaddr_into_url(address.clone())?; - let connection_open_timeout = self.config.connection_open_timeout; - let max_read_ahead_factor = self.config.noise_read_ahead_frame_count; - let max_write_buffer_size = self.config.noise_write_buffer_size; - let substream_open_timeout = self.config.substream_open_timeout; - let dial_addresses = self.dial_addresses.clone(); - let nodelay = self.config.nodelay; - let resolver = self.resolver.clone(); - - self.pending_dials.insert(connection_id, address.clone()); - - tracing::debug!(target: LOG_TARGET, ?connection_id, ?address, "open connection"); - - let future = async move { - let (_, stream) = WebSocketTransport::dial_peer( - address.clone(), - dial_addresses, - connection_open_timeout, - nodelay, - resolver, - ) - .await - .map_err(|error| (connection_id, error))?; - - WebSocketConnection::open_connection( - connection_id, - keypair, - stream, - address, - peer, - ws_address, - yamux_config, - max_read_ahead_factor, - max_write_buffer_size, - substream_open_timeout, - ) - .await - .map_err(|error| (connection_id, error.into())) - }; - - self.pending_connections.push(Box::pin(async move { - match tokio::time::timeout(connection_open_timeout, future).await { - Err(_) => Err((connection_id, DialError::Timeout)), - Ok(Err(error)) => Err(error), - Ok(Ok(result)) => Ok(result), - } - })); - - Ok(()) - } - - fn accept( - &mut self, - connection_id: ConnectionId, - ) -> crate::Result>> { - let context = self - .pending_open - .remove(&connection_id) - .ok_or(Error::ConnectionDoesntExist(connection_id))?; - let mut protocol_set = self.context.protocol_set(connection_id); - let bandwidth_sink = self.context.bandwidth_sink.clone(); - let substream_open_timeout = self.config.substream_open_timeout; - let executor = self.context.executor.clone(); - - tracing::trace!( - target: LOG_TARGET, - ?connection_id, - "start connection", - ); - - let peer = context.peer(); - let endpoint = context.endpoint(); - - Ok(Box::pin(async move { - // First, notify all protocols about the connection establishment - protocol_set.report_connection_established(peer, endpoint).await?; - - // After protocols are notified, spawn the connection event loop - executor.run(Box::pin(async move { - if let Err(error) = WebSocketConnection::new( - context, - protocol_set, - bandwidth_sink, - substream_open_timeout, - ) - .start() - .await - { - tracing::debug!( - target: LOG_TARGET, - ?connection_id, - ?error, - "connection exited with error", - ); - } - })); - - Ok(()) - })) - } - - fn reject(&mut self, connection_id: ConnectionId) -> crate::Result<()> { - self.pending_open - .remove(&connection_id) - .map_or(Err(Error::ConnectionDoesntExist(connection_id)), |_| Ok(())) - } - - fn accept_pending(&mut self, connection_id: ConnectionId) -> crate::Result<()> { - let pending = self.pending_inbound_connections.remove(&connection_id).ok_or_else(|| { - tracing::error!( - target: LOG_TARGET, - ?connection_id, - "Cannot accept non existent pending connection", - ); - - Error::ConnectionDoesntExist(connection_id) - })?; - - self.on_inbound_connection(connection_id, pending.connection, pending.address); - - Ok(()) - } - - fn reject_pending(&mut self, connection_id: ConnectionId) -> crate::Result<()> { - self.pending_inbound_connections.remove(&connection_id).map_or_else( - || { - tracing::error!( - target: LOG_TARGET, - ?connection_id, - "Cannot reject non existent pending connection", - ); - - Err(Error::ConnectionDoesntExist(connection_id)) - }, - |_| Ok(()), - ) - } - - fn open( - &mut self, - connection_id: ConnectionId, - addresses: Vec, - ) -> crate::Result<()> { - let num_addresses = addresses.len(); - - let yamux_config = self.config.yamux_config.clone(); - let keypair = self.context.keypair.clone(); - let connection_open_timeout = self.config.connection_open_timeout; - let max_read_ahead_factor = self.config.noise_read_ahead_frame_count; - let max_write_buffer_size = self.config.noise_write_buffer_size; - let substream_open_timeout = self.config.substream_open_timeout; - let max_parallel_dials = self.config.max_parallel_dials; - let dial_addresses = self.dial_addresses.clone(); - let nodelay = self.config.nodelay; - let resolver = self.resolver.clone(); - - let futures = futures::stream::iter(addresses.into_iter().map(move |address| { - let yamux_config = yamux_config.clone(); - let keypair = keypair.clone(); - let dial_addresses = dial_addresses.clone(); - let resolver = resolver.clone(); - - async move { - let (address, stream) = WebSocketTransport::dial_peer( - address.clone(), - dial_addresses, - connection_open_timeout, - nodelay, - resolver, - ) - .await - .map_err(|error| (address, error))?; - - let open_address = address.clone(); - let (ws_address, peer) = Self::multiaddr_into_url(address.clone()) - .map_err(|error| (address.clone(), error.into()))?; - - WebSocketConnection::open_connection( - connection_id, - keypair, - stream, - address, - peer, - ws_address, - yamux_config, - max_read_ahead_factor, - max_write_buffer_size, - substream_open_timeout, - ) - .await - .map_err(|error| (open_address, error.into())) - } - })) - .buffer_unordered(max_parallel_dials); - - // Future that will resolve to the first successful connection. - // - // The overall deadline caps the total time spent dialing across all addresses, - // preventing unbounded dialing when many addresses are provided. - let future = async move { - let mut errors = Vec::with_capacity(num_addresses); - // Deadline for the overall dial attempt, including all retries. This is to prevent - // retry attempts from indefinitely delaying the dial result. - let dial_deadline = DIAL_DEADLINE_MULTIPLIER * connection_open_timeout; - let deadline = tokio::time::sleep(dial_deadline); - - tokio::pin!(deadline); - tokio::pin!(futures); - - loop { - tokio::select! { - result = futures.next() => { - match result { - Some(Ok(negotiated)) => { - return RawConnectionResult::Connected { - negotiated, - errors, - }; - } - Some(Err(error)) => { - tracing::debug!( - target: LOG_TARGET, - ?connection_id, - ?error, - "failed to open connection", - ); - errors.push(error); - } - None => { - return RawConnectionResult::Failed { - connection_id, - errors, - }; - } - } - } - _ = &mut deadline => { - tracing::debug!( - target: LOG_TARGET, - ?connection_id, - ?dial_deadline, - "overall dial timeout exceeded", - ); - return RawConnectionResult::Failed { - connection_id, - errors, - }; - } - } - } - }; - - let (fut, handle) = futures::future::abortable(future); - let fut = fut.unwrap_or_else(move |_| RawConnectionResult::Canceled { connection_id }); - self.pending_raw_connections.push(Box::pin(fut)); - self.cancel_futures.insert(connection_id, handle); - - Ok(()) - } - - fn negotiate(&mut self, connection_id: ConnectionId) -> crate::Result<()> { - let negotiated = self - .opened - .remove(&connection_id) - .ok_or(Error::ConnectionDoesntExist(connection_id))?; - - self.pending_connections.push(Box::pin(async move { Ok(negotiated) })); - - Ok(()) - } - - fn cancel(&mut self, connection_id: ConnectionId) { - // Cancel the future if it exists. - // State clean-up happens inside the `poll_next`. - if let Some(handle) = self.cancel_futures.get(&connection_id) { - handle.abort(); - } - } + fn dial(&mut self, connection_id: ConnectionId, address: Multiaddr) -> crate::Result<()> { + let yamux_config = self.config.yamux_config.clone(); + let keypair = self.context.keypair.clone(); + let (ws_address, peer) = Self::multiaddr_into_url(address.clone())?; + let connection_open_timeout = self.config.connection_open_timeout; + let max_read_ahead_factor = self.config.noise_read_ahead_frame_count; + let max_write_buffer_size = self.config.noise_write_buffer_size; + let substream_open_timeout = self.config.substream_open_timeout; + let dial_addresses = self.dial_addresses.clone(); + let nodelay = self.config.nodelay; + let resolver = self.resolver.clone(); + + self.pending_dials.insert(connection_id, address.clone()); + + tracing::debug!(target: LOG_TARGET, ?connection_id, ?address, "open connection"); + + let future = async move { + let (_, stream) = WebSocketTransport::dial_peer( + address.clone(), + dial_addresses, + connection_open_timeout, + nodelay, + resolver, + ) + .await + .map_err(|error| (connection_id, error))?; + + WebSocketConnection::open_connection( + connection_id, + keypair, + stream, + address, + peer, + ws_address, + yamux_config, + max_read_ahead_factor, + max_write_buffer_size, + substream_open_timeout, + ) + .await + .map_err(|error| (connection_id, error.into())) + }; + + self.pending_connections.push(Box::pin(async move { + match tokio::time::timeout(connection_open_timeout, future).await { + Err(_) => Err((connection_id, DialError::Timeout)), + Ok(Err(error)) => Err(error), + Ok(Ok(result)) => Ok(result), + } + })); + + Ok(()) + } + + fn accept( + &mut self, + connection_id: ConnectionId, + ) -> crate::Result>> { + let context = self + .pending_open + .remove(&connection_id) + .ok_or(Error::ConnectionDoesntExist(connection_id))?; + let mut protocol_set = self.context.protocol_set(connection_id); + let bandwidth_sink = self.context.bandwidth_sink.clone(); + let substream_open_timeout = self.config.substream_open_timeout; + let executor = self.context.executor.clone(); + + tracing::trace!( + target: LOG_TARGET, + ?connection_id, + "start connection", + ); + + let peer = context.peer(); + let endpoint = context.endpoint(); + + Ok(Box::pin(async move { + // First, notify all protocols about the connection establishment + protocol_set.report_connection_established(peer, endpoint).await?; + + // After protocols are notified, spawn the connection event loop + executor.run(Box::pin(async move { + if let Err(error) = WebSocketConnection::new( + context, + protocol_set, + bandwidth_sink, + substream_open_timeout, + ) + .start() + .await + { + tracing::debug!( + target: LOG_TARGET, + ?connection_id, + ?error, + "connection exited with error", + ); + } + })); + + Ok(()) + })) + } + + fn reject(&mut self, connection_id: ConnectionId) -> crate::Result<()> { + self.pending_open + .remove(&connection_id) + .map_or(Err(Error::ConnectionDoesntExist(connection_id)), |_| Ok(())) + } + + fn accept_pending(&mut self, connection_id: ConnectionId) -> crate::Result<()> { + let pending = self.pending_inbound_connections.remove(&connection_id).ok_or_else(|| { + tracing::error!( + target: LOG_TARGET, + ?connection_id, + "Cannot accept non existent pending connection", + ); + + Error::ConnectionDoesntExist(connection_id) + })?; + + self.on_inbound_connection(connection_id, pending.connection, pending.address); + + Ok(()) + } + + fn reject_pending(&mut self, connection_id: ConnectionId) -> crate::Result<()> { + self.pending_inbound_connections.remove(&connection_id).map_or_else( + || { + tracing::error!( + target: LOG_TARGET, + ?connection_id, + "Cannot reject non existent pending connection", + ); + + Err(Error::ConnectionDoesntExist(connection_id)) + }, + |_| Ok(()), + ) + } + + fn open( + &mut self, + connection_id: ConnectionId, + addresses: Vec, + ) -> crate::Result<()> { + let num_addresses = addresses.len(); + + let yamux_config = self.config.yamux_config.clone(); + let keypair = self.context.keypair.clone(); + let connection_open_timeout = self.config.connection_open_timeout; + let max_read_ahead_factor = self.config.noise_read_ahead_frame_count; + let max_write_buffer_size = self.config.noise_write_buffer_size; + let substream_open_timeout = self.config.substream_open_timeout; + let max_parallel_dials = self.config.max_parallel_dials; + let dial_addresses = self.dial_addresses.clone(); + let nodelay = self.config.nodelay; + let resolver = self.resolver.clone(); + + let futures = futures::stream::iter(addresses.into_iter().map(move |address| { + let yamux_config = yamux_config.clone(); + let keypair = keypair.clone(); + let dial_addresses = dial_addresses.clone(); + let resolver = resolver.clone(); + + async move { + let (address, stream) = WebSocketTransport::dial_peer( + address.clone(), + dial_addresses, + connection_open_timeout, + nodelay, + resolver, + ) + .await + .map_err(|error| (address, error))?; + + let open_address = address.clone(); + let (ws_address, peer) = Self::multiaddr_into_url(address.clone()) + .map_err(|error| (address.clone(), error.into()))?; + + WebSocketConnection::open_connection( + connection_id, + keypair, + stream, + address, + peer, + ws_address, + yamux_config, + max_read_ahead_factor, + max_write_buffer_size, + substream_open_timeout, + ) + .await + .map_err(|error| (open_address, error.into())) + } + })) + .buffer_unordered(max_parallel_dials); + + // Future that will resolve to the first successful connection. + // + // The overall deadline caps the total time spent dialing across all addresses, + // preventing unbounded dialing when many addresses are provided. + let future = async move { + let mut errors = Vec::with_capacity(num_addresses); + // Deadline for the overall dial attempt, including all retries. This is to prevent + // retry attempts from indefinitely delaying the dial result. + let dial_deadline = DIAL_DEADLINE_MULTIPLIER * connection_open_timeout; + let deadline = tokio::time::sleep(dial_deadline); + + tokio::pin!(deadline); + tokio::pin!(futures); + + loop { + tokio::select! { + result = futures.next() => { + match result { + Some(Ok(negotiated)) => { + return RawConnectionResult::Connected { + negotiated, + errors, + }; + } + Some(Err(error)) => { + tracing::debug!( + target: LOG_TARGET, + ?connection_id, + ?error, + "failed to open connection", + ); + errors.push(error); + } + None => { + return RawConnectionResult::Failed { + connection_id, + errors, + }; + } + } + } + _ = &mut deadline => { + tracing::debug!( + target: LOG_TARGET, + ?connection_id, + ?dial_deadline, + "overall dial timeout exceeded", + ); + return RawConnectionResult::Failed { + connection_id, + errors, + }; + } + } + } + }; + + let (fut, handle) = futures::future::abortable(future); + let fut = fut.unwrap_or_else(move |_| RawConnectionResult::Canceled { connection_id }); + self.pending_raw_connections.push(Box::pin(fut)); + self.cancel_futures.insert(connection_id, handle); + + Ok(()) + } + + fn negotiate(&mut self, connection_id: ConnectionId) -> crate::Result<()> { + let negotiated = self + .opened + .remove(&connection_id) + .ok_or(Error::ConnectionDoesntExist(connection_id))?; + + self.pending_connections.push(Box::pin(async move { Ok(negotiated) })); + + Ok(()) + } + + fn cancel(&mut self, connection_id: ConnectionId) { + // Cancel the future if it exists. + // State clean-up happens inside the `poll_next`. + if let Some(handle) = self.cancel_futures.get(&connection_id) { + handle.abort(); + } + } } impl Stream for WebSocketTransport { - type Item = TransportEvent; - - fn poll_next(mut self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll> { - if let Poll::Ready(event) = self.listener.poll_next_unpin(cx) { - return match event { - None => { - tracing::error!( - target: LOG_TARGET, - "Websocket listener terminated, ignore if the node is stopping", - ); - - Poll::Ready(None) - } - Some(Err(error)) => { - tracing::error!( - target: LOG_TARGET, - ?error, - "Websocket listener terminated with error", - ); - - Poll::Ready(None) - } - Some(Ok((connection, address))) => { - let connection_id = self.context.next_connection_id(); - tracing::trace!( - target: LOG_TARGET, - ?connection_id, - ?address, - "pending inbound Websocket connection", - ); - - self.pending_inbound_connections.insert( - connection_id, - PendingInboundConnection { - connection, - address, - }, - ); - - Poll::Ready(Some(TransportEvent::PendingInboundConnection { - connection_id, - })) - } - }; - } - - while let Poll::Ready(Some(result)) = self.pending_raw_connections.poll_next_unpin(cx) { - tracing::trace!(target: LOG_TARGET, ?result, "raw connection result"); - - match result { - RawConnectionResult::Connected { negotiated, errors } => { - let Some(handle) = self.cancel_futures.remove(&negotiated.connection_id()) - else { - tracing::warn!( - target: LOG_TARGET, - connection_id = ?negotiated.connection_id(), - address = ?negotiated.endpoint().address(), - ?errors, - "raw connection without a cancel handle", - ); - continue; - }; - - if !handle.is_aborted() { - let connection_id = negotiated.connection_id(); - let address = negotiated.endpoint().address().clone(); - - self.opened.insert(connection_id, negotiated); - - return Poll::Ready(Some(TransportEvent::ConnectionOpened { - connection_id, - address, - errors, - })); - } - } - - RawConnectionResult::Failed { - connection_id, - errors, - } => { - let Some(handle) = self.cancel_futures.remove(&connection_id) else { - tracing::warn!( - target: LOG_TARGET, - ?connection_id, - ?errors, - "raw connection without a cancel handle", - ); - continue; - }; - - if !handle.is_aborted() { - return Poll::Ready(Some(TransportEvent::OpenFailure { - connection_id, - errors, - })); - } - } - RawConnectionResult::Canceled { connection_id } => { - if self.cancel_futures.remove(&connection_id).is_none() { - tracing::warn!( - target: LOG_TARGET, - ?connection_id, - "raw cancelled connection without a cancel handle", - ); - } - } - } - } - - while let Poll::Ready(Some(connection)) = self.pending_connections.poll_next_unpin(cx) { - match connection { - Ok(connection) => { - let peer = connection.peer(); - let endpoint = connection.endpoint(); - self.pending_dials.remove(&connection.connection_id()); - self.pending_open.insert(connection.connection_id(), connection); - - return Poll::Ready(Some(TransportEvent::ConnectionEstablished { - peer, - endpoint, - })); - } - Err((connection_id, error)) => { - if let Some(address) = self.pending_dials.remove(&connection_id) { - return Poll::Ready(Some(TransportEvent::DialFailure { - connection_id, - address, - error, - })); - } else { - tracing::debug!(target: LOG_TARGET, ?error, ?connection_id, "Pending inbound connection failed"); - } - } - } - } - - Poll::Pending - } + type Item = TransportEvent; + + fn poll_next(mut self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll> { + if let Poll::Ready(event) = self.listener.poll_next_unpin(cx) { + return match event { + None => { + tracing::error!( + target: LOG_TARGET, + "Websocket listener terminated, ignore if the node is stopping", + ); + + Poll::Ready(None) + }, + Some(Err(error)) => { + tracing::error!( + target: LOG_TARGET, + ?error, + "Websocket listener terminated with error", + ); + + Poll::Ready(None) + }, + Some(Ok((connection, address))) => { + let connection_id = self.context.next_connection_id(); + tracing::trace!( + target: LOG_TARGET, + ?connection_id, + ?address, + "pending inbound Websocket connection", + ); + + self.pending_inbound_connections + .insert(connection_id, PendingInboundConnection { connection, address }); + + Poll::Ready(Some(TransportEvent::PendingInboundConnection { connection_id })) + }, + }; + } + + while let Poll::Ready(Some(result)) = self.pending_raw_connections.poll_next_unpin(cx) { + tracing::trace!(target: LOG_TARGET, ?result, "raw connection result"); + + match result { + RawConnectionResult::Connected { negotiated, errors } => { + let Some(handle) = self.cancel_futures.remove(&negotiated.connection_id()) + else { + tracing::warn!( + target: LOG_TARGET, + connection_id = ?negotiated.connection_id(), + address = ?negotiated.endpoint().address(), + ?errors, + "raw connection without a cancel handle", + ); + continue; + }; + + if !handle.is_aborted() { + let connection_id = negotiated.connection_id(); + let address = negotiated.endpoint().address().clone(); + + self.opened.insert(connection_id, negotiated); + + return Poll::Ready(Some(TransportEvent::ConnectionOpened { + connection_id, + address, + errors, + })); + } + }, + + RawConnectionResult::Failed { connection_id, errors } => { + let Some(handle) = self.cancel_futures.remove(&connection_id) else { + tracing::warn!( + target: LOG_TARGET, + ?connection_id, + ?errors, + "raw connection without a cancel handle", + ); + continue; + }; + + if !handle.is_aborted() { + return Poll::Ready(Some(TransportEvent::OpenFailure { + connection_id, + errors, + })); + } + }, + RawConnectionResult::Canceled { connection_id } => { + if self.cancel_futures.remove(&connection_id).is_none() { + tracing::warn!( + target: LOG_TARGET, + ?connection_id, + "raw cancelled connection without a cancel handle", + ); + } + }, + } + } + + while let Poll::Ready(Some(connection)) = self.pending_connections.poll_next_unpin(cx) { + match connection { + Ok(connection) => { + let peer = connection.peer(); + let endpoint = connection.endpoint(); + self.pending_dials.remove(&connection.connection_id()); + self.pending_open.insert(connection.connection_id(), connection); + + return Poll::Ready(Some(TransportEvent::ConnectionEstablished { + peer, + endpoint, + })); + }, + Err((connection_id, error)) => { + if let Some(address) = self.pending_dials.remove(&connection_id) { + return Poll::Ready(Some(TransportEvent::DialFailure { + connection_id, + address, + error, + })); + } else { + tracing::debug!(target: LOG_TARGET, ?error, ?connection_id, "Pending inbound connection failed"); + } + }, + } + } + + Poll::Pending + } } diff --git a/client/litep2p/src/transport/websocket/stream.rs b/client/litep2p/src/transport/websocket/stream.rs index 05846c9d..7a0f3887 100644 --- a/client/litep2p/src/transport/websocket/stream.rs +++ b/client/litep2p/src/transport/websocket/stream.rs @@ -27,8 +27,8 @@ use tokio::io::{AsyncRead, AsyncWrite}; use tokio_tungstenite::{tungstenite::Message, WebSocketStream}; use std::{ - pin::Pin, - task::{Context, Poll}, + pin::Pin, + task::{Context, Poll}, }; const LOG_TARGET: &str = "litep2p::transport::websocket::stream"; @@ -36,191 +36,185 @@ const LOG_TARGET: &str = "litep2p::transport::websocket::stream"; /// Buffered stream which implements `AsyncRead + AsyncWrite` #[derive(Debug)] pub(super) struct BufferedStream { - /// Read buffer. - /// - /// The buffer is taken directly from the WebSocket stream. - read_buffer: Bytes, + /// Read buffer. + /// + /// The buffer is taken directly from the WebSocket stream. + read_buffer: Bytes, - /// Underlying WebSocket stream. - stream: WebSocketStream, + /// Underlying WebSocket stream. + stream: WebSocketStream, } impl BufferedStream { - /// Create new [`BufferedStream`]. - pub(super) fn new(stream: WebSocketStream) -> Self { - Self { - read_buffer: Bytes::new(), - stream, - } - } + /// Create new [`BufferedStream`]. + pub(super) fn new(stream: WebSocketStream) -> Self { + Self { read_buffer: Bytes::new(), stream } + } } impl futures::AsyncWrite for BufferedStream { - fn poll_write( - mut self: Pin<&mut Self>, - cx: &mut Context<'_>, - buf: &[u8], - ) -> Poll> { - match futures::ready!(self.stream.poll_ready_unpin(cx)) { - Ok(()) => { - let message = Message::Binary(Bytes::copy_from_slice(buf)); - - if let Err(err) = self.stream.start_send_unpin(message) { - tracing::debug!(target: LOG_TARGET, "Error during start send: {:?}", err); - return Poll::Ready(Err(std::io::ErrorKind::UnexpectedEof.into())); - } - - Poll::Ready(Ok(buf.len())) - } - Err(err) => { - tracing::debug!(target: LOG_TARGET, "Error during poll ready: {:?}", err); - Poll::Ready(Err(std::io::ErrorKind::UnexpectedEof.into())) - } - } - } - - fn poll_flush(mut self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll> { - self.stream.poll_flush_unpin(cx).map_err(|err| { - tracing::debug!(target: LOG_TARGET, "Error during poll flush: {:?}", err); - std::io::ErrorKind::UnexpectedEof.into() - }) - } - - fn poll_close(mut self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll> { - self.stream.poll_close_unpin(cx).map_err(|err| { - tracing::debug!(target: LOG_TARGET, "Error during poll close: {:?}", err); - std::io::ErrorKind::PermissionDenied.into() - }) - } + fn poll_write( + mut self: Pin<&mut Self>, + cx: &mut Context<'_>, + buf: &[u8], + ) -> Poll> { + match futures::ready!(self.stream.poll_ready_unpin(cx)) { + Ok(()) => { + let message = Message::Binary(Bytes::copy_from_slice(buf)); + + if let Err(err) = self.stream.start_send_unpin(message) { + tracing::debug!(target: LOG_TARGET, "Error during start send: {:?}", err); + return Poll::Ready(Err(std::io::ErrorKind::UnexpectedEof.into())); + } + + Poll::Ready(Ok(buf.len())) + }, + Err(err) => { + tracing::debug!(target: LOG_TARGET, "Error during poll ready: {:?}", err); + Poll::Ready(Err(std::io::ErrorKind::UnexpectedEof.into())) + }, + } + } + + fn poll_flush(mut self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll> { + self.stream.poll_flush_unpin(cx).map_err(|err| { + tracing::debug!(target: LOG_TARGET, "Error during poll flush: {:?}", err); + std::io::ErrorKind::UnexpectedEof.into() + }) + } + + fn poll_close(mut self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll> { + self.stream.poll_close_unpin(cx).map_err(|err| { + tracing::debug!(target: LOG_TARGET, "Error during poll close: {:?}", err); + std::io::ErrorKind::PermissionDenied.into() + }) + } } impl futures::AsyncRead for BufferedStream { - fn poll_read( - mut self: Pin<&mut Self>, - cx: &mut Context<'_>, - buf: &mut [u8], - ) -> Poll> { - loop { - if self.read_buffer.is_empty() { - let next_chunk = match self.stream.poll_next_unpin(cx) { - Poll::Ready(Some(Ok(chunk))) => match chunk { - Message::Binary(chunk) => chunk, - _event => return Poll::Ready(Err(std::io::ErrorKind::Unsupported.into())), - }, - Poll::Ready(Some(Err(_error))) => - return Poll::Ready(Err(std::io::ErrorKind::UnexpectedEof.into())), - Poll::Ready(None) => return Poll::Ready(Ok(0)), - Poll::Pending => return Poll::Pending, - }; - - self.read_buffer = next_chunk; - continue; - } - - let len = std::cmp::min(self.read_buffer.len(), buf.len()); - buf[..len].copy_from_slice(&self.read_buffer[..len]); - self.read_buffer.advance(len); - return Poll::Ready(Ok(len)); - } - } + fn poll_read( + mut self: Pin<&mut Self>, + cx: &mut Context<'_>, + buf: &mut [u8], + ) -> Poll> { + loop { + if self.read_buffer.is_empty() { + let next_chunk = match self.stream.poll_next_unpin(cx) { + Poll::Ready(Some(Ok(chunk))) => match chunk { + Message::Binary(chunk) => chunk, + _event => return Poll::Ready(Err(std::io::ErrorKind::Unsupported.into())), + }, + Poll::Ready(Some(Err(_error))) => + return Poll::Ready(Err(std::io::ErrorKind::UnexpectedEof.into())), + Poll::Ready(None) => return Poll::Ready(Ok(0)), + Poll::Pending => return Poll::Pending, + }; + + self.read_buffer = next_chunk; + continue; + } + + let len = std::cmp::min(self.read_buffer.len(), buf.len()); + buf[..len].copy_from_slice(&self.read_buffer[..len]); + self.read_buffer.advance(len); + return Poll::Ready(Ok(len)); + } + } } #[cfg(test)] mod tests { - use super::*; - use futures::{AsyncRead, AsyncReadExt, AsyncWriteExt}; - use tokio::io::DuplexStream; - use tokio_tungstenite::{tungstenite::protocol::Role, WebSocketStream}; - - async fn create_test_stream() -> (BufferedStream, BufferedStream) { - let (client, server) = tokio::io::duplex(1024); - - ( - BufferedStream::new(WebSocketStream::from_raw_socket(client, Role::Client, None).await), - BufferedStream::new(WebSocketStream::from_raw_socket(server, Role::Server, None).await), - ) - } - - #[tokio::test] - async fn test_write_to_buffer() { - let (mut stream, mut _server) = create_test_stream().await; - let data = b"hello"; - - let bytes_written = stream.write(data).await.unwrap(); - assert_eq!(bytes_written, data.len()); - } - - #[tokio::test] - async fn test_flush_empty_buffer() { - let (mut stream, mut _server) = create_test_stream().await; - assert!(stream.flush().await.is_ok()); - } - - #[tokio::test] - async fn test_write_and_flush() { - let (mut stream, mut _server) = create_test_stream().await; - let data = b"hello world"; - - stream.write_all(data).await.unwrap(); - assert!(stream.flush().await.is_ok()); - } - - #[tokio::test] - async fn test_close_stream() { - let (mut stream, mut _server) = create_test_stream().await; - assert!(stream.close().await.is_ok()); - } - - #[tokio::test] - async fn test_ping_pong_stream() { - let (mut stream, mut server) = create_test_stream().await; - stream.write(b"hello").await.unwrap(); - assert!(stream.flush().await.is_ok()); - - let mut message = [0u8; 5]; - server.read(&mut message).await.unwrap(); - assert_eq!(&message, b"hello"); - - server.write(b"world").await.unwrap(); - assert!(server.flush().await.is_ok()); - - stream.read(&mut message).await.unwrap(); - assert_eq!(&message, b"world"); - - assert!(stream.close().await.is_ok()); - drop(stream); - - assert!(server.write(b"world").await.is_ok()); - match server.flush().await { - Err(error) => if error.kind() == std::io::ErrorKind::UnexpectedEof {}, - state => panic!("Unexpected state {state:?}"), - }; - } - - #[tokio::test] - async fn test_read_poll_pending() { - let (mut stream, mut _server) = create_test_stream().await; - - let mut buffer = [0u8; 10]; - let mut cx = std::task::Context::from_waker(futures::task::noop_waker_ref()); - let pin_stream = Pin::new(&mut stream); - - assert!(matches!( - pin_stream.poll_read(&mut cx, &mut buffer), - Poll::Pending - )); - } - - #[tokio::test] - async fn test_read_from_internal_buffers() { - let (mut stream, server) = create_test_stream().await; - drop(server); - - stream.read_buffer = Bytes::from_static(b"hello world"); - - let mut buffer = [0u8; 32]; - let bytes_read = stream.read(&mut buffer).await.unwrap(); - assert_eq!(bytes_read, 11); - assert_eq!(&buffer[..bytes_read], b"hello world"); - } + use super::*; + use futures::{AsyncRead, AsyncReadExt, AsyncWriteExt}; + use tokio::io::DuplexStream; + use tokio_tungstenite::{tungstenite::protocol::Role, WebSocketStream}; + + async fn create_test_stream() -> (BufferedStream, BufferedStream) { + let (client, server) = tokio::io::duplex(1024); + + ( + BufferedStream::new(WebSocketStream::from_raw_socket(client, Role::Client, None).await), + BufferedStream::new(WebSocketStream::from_raw_socket(server, Role::Server, None).await), + ) + } + + #[tokio::test] + async fn test_write_to_buffer() { + let (mut stream, mut _server) = create_test_stream().await; + let data = b"hello"; + + let bytes_written = stream.write(data).await.unwrap(); + assert_eq!(bytes_written, data.len()); + } + + #[tokio::test] + async fn test_flush_empty_buffer() { + let (mut stream, mut _server) = create_test_stream().await; + assert!(stream.flush().await.is_ok()); + } + + #[tokio::test] + async fn test_write_and_flush() { + let (mut stream, mut _server) = create_test_stream().await; + let data = b"hello world"; + + stream.write_all(data).await.unwrap(); + assert!(stream.flush().await.is_ok()); + } + + #[tokio::test] + async fn test_close_stream() { + let (mut stream, mut _server) = create_test_stream().await; + assert!(stream.close().await.is_ok()); + } + + #[tokio::test] + async fn test_ping_pong_stream() { + let (mut stream, mut server) = create_test_stream().await; + stream.write(b"hello").await.unwrap(); + assert!(stream.flush().await.is_ok()); + + let mut message = [0u8; 5]; + server.read(&mut message).await.unwrap(); + assert_eq!(&message, b"hello"); + + server.write(b"world").await.unwrap(); + assert!(server.flush().await.is_ok()); + + stream.read(&mut message).await.unwrap(); + assert_eq!(&message, b"world"); + + assert!(stream.close().await.is_ok()); + drop(stream); + + assert!(server.write(b"world").await.is_ok()); + match server.flush().await { + Err(error) => if error.kind() == std::io::ErrorKind::UnexpectedEof {}, + state => panic!("Unexpected state {state:?}"), + }; + } + + #[tokio::test] + async fn test_read_poll_pending() { + let (mut stream, mut _server) = create_test_stream().await; + + let mut buffer = [0u8; 10]; + let mut cx = std::task::Context::from_waker(futures::task::noop_waker_ref()); + let pin_stream = Pin::new(&mut stream); + + assert!(matches!(pin_stream.poll_read(&mut cx, &mut buffer), Poll::Pending)); + } + + #[tokio::test] + async fn test_read_from_internal_buffers() { + let (mut stream, server) = create_test_stream().await; + drop(server); + + stream.read_buffer = Bytes::from_static(b"hello world"); + + let mut buffer = [0u8; 32]; + let bytes_read = stream.read(&mut buffer).await.unwrap(); + assert_eq!(bytes_read, 11); + assert_eq!(&buffer[..bytes_read], b"hello world"); + } } diff --git a/client/litep2p/src/transport/websocket/substream.rs b/client/litep2p/src/transport/websocket/substream.rs index 4f7e59e8..b94d45b6 100644 --- a/client/litep2p/src/transport/websocket/substream.rs +++ b/client/litep2p/src/transport/websocket/substream.rs @@ -24,80 +24,76 @@ use tokio::io::{AsyncRead, AsyncWrite}; use tokio_util::compat::Compat; use std::{ - io, - pin::Pin, - task::{Context, Poll}, + io, + pin::Pin, + task::{Context, Poll}, }; /// Substream that holds the inner substream provided by the transport. #[derive(Debug)] pub struct Substream { - /// Underlying socket. - io: Compat, + /// Underlying socket. + io: Compat, - /// Bandwidth sink. - bandwidth_sink: BandwidthSink, + /// Bandwidth sink. + bandwidth_sink: BandwidthSink, - /// Connection permit if this substream keeps connection alive. - _lifetime_permit: Option, + /// Connection permit if this substream keeps connection alive. + _lifetime_permit: Option, } impl Substream { - /// Create new [`Substream`]. - pub fn new( - io: Compat, - bandwidth_sink: BandwidthSink, - _lifetime_permit: Option, - ) -> Self { - Self { - io, - bandwidth_sink, - _lifetime_permit, - } - } + /// Create new [`Substream`]. + pub fn new( + io: Compat, + bandwidth_sink: BandwidthSink, + _lifetime_permit: Option, + ) -> Self { + Self { io, bandwidth_sink, _lifetime_permit } + } } impl AsyncRead for Substream { - fn poll_read( - mut self: Pin<&mut Self>, - cx: &mut Context<'_>, - buf: &mut tokio::io::ReadBuf<'_>, - ) -> Poll> { - let len = buf.filled().len(); - match futures::ready!(Pin::new(&mut self.io).poll_read(cx, buf)) { - Err(error) => Poll::Ready(Err(error)), - Ok(res) => { - let inbound_size = buf.filled().len().saturating_sub(len); - self.bandwidth_sink.increase_inbound(inbound_size); - Poll::Ready(Ok(res)) - } - } - } + fn poll_read( + mut self: Pin<&mut Self>, + cx: &mut Context<'_>, + buf: &mut tokio::io::ReadBuf<'_>, + ) -> Poll> { + let len = buf.filled().len(); + match futures::ready!(Pin::new(&mut self.io).poll_read(cx, buf)) { + Err(error) => Poll::Ready(Err(error)), + Ok(res) => { + let inbound_size = buf.filled().len().saturating_sub(len); + self.bandwidth_sink.increase_inbound(inbound_size); + Poll::Ready(Ok(res)) + }, + } + } } impl AsyncWrite for Substream { - fn poll_write( - mut self: Pin<&mut Self>, - cx: &mut Context<'_>, - buf: &[u8], - ) -> Poll> { - match futures::ready!(Pin::new(&mut self.io).poll_write(cx, buf)) { - Err(error) => Poll::Ready(Err(error)), - Ok(nwritten) => { - self.bandwidth_sink.increase_outbound(nwritten); - Poll::Ready(Ok(nwritten)) - } - } - } + fn poll_write( + mut self: Pin<&mut Self>, + cx: &mut Context<'_>, + buf: &[u8], + ) -> Poll> { + match futures::ready!(Pin::new(&mut self.io).poll_write(cx, buf)) { + Err(error) => Poll::Ready(Err(error)), + Ok(nwritten) => { + self.bandwidth_sink.increase_outbound(nwritten); + Poll::Ready(Ok(nwritten)) + }, + } + } - fn poll_flush(mut self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll> { - Pin::new(&mut self.io).poll_flush(cx) - } + fn poll_flush(mut self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll> { + Pin::new(&mut self.io).poll_flush(cx) + } - fn poll_shutdown( - mut self: Pin<&mut Self>, - cx: &mut Context<'_>, - ) -> Poll> { - Pin::new(&mut self.io).poll_shutdown(cx) - } + fn poll_shutdown( + mut self: Pin<&mut Self>, + cx: &mut Context<'_>, + ) -> Poll> { + Pin::new(&mut self.io).poll_shutdown(cx) + } } diff --git a/client/litep2p/src/types.rs b/client/litep2p/src/types.rs index ad980690..f5d8791c 100644 --- a/client/litep2p/src/types.rs +++ b/client/litep2p/src/types.rs @@ -24,13 +24,13 @@ use rand::Rng; // Re-export the types used in public interfaces. pub mod multiaddr { - pub use multiaddr::{Error, Iter, Multiaddr, Onion3Addr, Protocol}; + pub use multiaddr::{Error, Iter, Multiaddr, Onion3Addr, Protocol}; } pub mod multihash { - pub use multihash::{Code, Error, Multihash, MultihashDigest}; + pub use multihash::{Code, Error, Multihash, MultihashDigest}; } pub mod cid { - pub use cid::{multihash::Multihash, Cid, CidGeneric, Error, Result, Version}; + pub use cid::{multihash::Multihash, Cid, CidGeneric, Error, Result, Version}; } pub mod protocol; @@ -40,21 +40,21 @@ pub mod protocol; pub struct SubstreamId(usize); impl Default for SubstreamId { - fn default() -> Self { - Self::new() - } + fn default() -> Self { + Self::new() + } } impl SubstreamId { - /// Create new [`SubstreamId`]. - pub fn new() -> Self { - SubstreamId(0usize) - } + /// Create new [`SubstreamId`]. + pub fn new() -> Self { + SubstreamId(0usize) + } - /// Get [`SubstreamId`] from a number that can be converted into a `usize`. - pub fn from>(value: T) -> Self { - SubstreamId(value.into()) - } + /// Get [`SubstreamId`] from a number that can be converted into a `usize`. + pub fn from>(value: T) -> Self { + SubstreamId(value.into()) + } } /// Request ID. @@ -63,10 +63,10 @@ impl SubstreamId { pub struct RequestId(usize); impl RequestId { - /// Get [`RequestId`] from a number that can be converted into a `usize`. - pub fn from>(value: T) -> Self { - RequestId(value.into()) - } + /// Get [`RequestId`] from a number that can be converted into a `usize`. + pub fn from>(value: T) -> Self { + RequestId(value.into()) + } } /// Connection ID. @@ -74,25 +74,25 @@ impl RequestId { pub struct ConnectionId(usize); impl ConnectionId { - /// Create new [`ConnectionId`]. - pub fn new() -> Self { - ConnectionId(0usize) - } + /// Create new [`ConnectionId`]. + pub fn new() -> Self { + ConnectionId(0usize) + } - /// Generate random `ConnectionId`. - pub fn random() -> Self { - ConnectionId(rand::thread_rng().gen::()) - } + /// Generate random `ConnectionId`. + pub fn random() -> Self { + ConnectionId(rand::thread_rng().gen::()) + } } impl Default for ConnectionId { - fn default() -> Self { - Self::new() - } + fn default() -> Self { + Self::new() + } } impl From for ConnectionId { - fn from(value: usize) -> Self { - ConnectionId(value) - } + fn from(value: usize) -> Self { + ConnectionId(value) + } } diff --git a/client/litep2p/src/types/protocol.rs b/client/litep2p/src/types/protocol.rs index eb64238b..a5bb598d 100644 --- a/client/litep2p/src/types/protocol.rs +++ b/client/litep2p/src/types/protocol.rs @@ -21,90 +21,90 @@ //! Protocol name. use std::{ - fmt::Display, - hash::{Hash, Hasher}, - sync::Arc, + fmt::Display, + hash::{Hash, Hasher}, + sync::Arc, }; /// Protocol name. #[derive(Debug, Clone)] #[cfg_attr(feature = "fuzz", derive(serde::Serialize, serde::Deserialize))] pub enum ProtocolName { - #[cfg(not(feature = "fuzz"))] - Static(&'static str), - Allocated(Arc), + #[cfg(not(feature = "fuzz"))] + Static(&'static str), + Allocated(Arc), } #[cfg(not(feature = "fuzz"))] impl From<&'static str> for ProtocolName { - fn from(protocol: &'static str) -> Self { - ProtocolName::Static(protocol) - } + fn from(protocol: &'static str) -> Self { + ProtocolName::Static(protocol) + } } #[cfg(feature = "fuzz")] impl From<&'static str> for ProtocolName { - fn from(protocol: &'static str) -> Self { - ProtocolName::Allocated(Arc::from(protocol.to_string())) - } + fn from(protocol: &'static str) -> Self { + ProtocolName::Allocated(Arc::from(protocol.to_string())) + } } impl Display for ProtocolName { - fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result { - match self { - #[cfg(not(feature = "fuzz"))] - Self::Static(protocol) => protocol.fmt(f), - Self::Allocated(protocol) => protocol.fmt(f), - } - } + fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result { + match self { + #[cfg(not(feature = "fuzz"))] + Self::Static(protocol) => protocol.fmt(f), + Self::Allocated(protocol) => protocol.fmt(f), + } + } } impl From for ProtocolName { - fn from(protocol: String) -> Self { - ProtocolName::Allocated(Arc::from(protocol)) - } + fn from(protocol: String) -> Self { + ProtocolName::Allocated(Arc::from(protocol)) + } } impl From> for ProtocolName { - fn from(protocol: Arc) -> Self { - Self::Allocated(protocol) - } + fn from(protocol: Arc) -> Self { + Self::Allocated(protocol) + } } impl std::ops::Deref for ProtocolName { - type Target = str; + type Target = str; - fn deref(&self) -> &Self::Target { - match self { - #[cfg(not(feature = "fuzz"))] - Self::Static(protocol) => protocol, - Self::Allocated(protocol) => protocol, - } - } + fn deref(&self) -> &Self::Target { + match self { + #[cfg(not(feature = "fuzz"))] + Self::Static(protocol) => protocol, + Self::Allocated(protocol) => protocol, + } + } } impl Hash for ProtocolName { - fn hash(&self, state: &mut H) { - (self as &str).hash(state) - } + fn hash(&self, state: &mut H) { + (self as &str).hash(state) + } } impl PartialEq for ProtocolName { - fn eq(&self, other: &Self) -> bool { - (self as &str) == (other as &str) - } + fn eq(&self, other: &Self) -> bool { + (self as &str) == (other as &str) + } } impl Eq for ProtocolName {} #[cfg(test)] mod tests { - use super::*; + use super::*; - #[test] - fn make_protocol() { - let protocol1 = ProtocolName::from(Arc::from(String::from("/protocol/1"))); - let protocol2 = ProtocolName::from("/protocol/1"); + #[test] + fn make_protocol() { + let protocol1 = ProtocolName::from(Arc::from(String::from("/protocol/1"))); + let protocol2 = ProtocolName::from("/protocol/1"); - assert_eq!(protocol1, protocol2); - } + assert_eq!(protocol1, protocol2); + } } diff --git a/client/litep2p/src/utils/futures_stream.rs b/client/litep2p/src/utils/futures_stream.rs index 7f134794..d2c75ca3 100644 --- a/client/litep2p/src/utils/futures_stream.rs +++ b/client/litep2p/src/utils/futures_stream.rs @@ -21,9 +21,9 @@ use futures::{stream::FuturesUnordered, Stream, StreamExt}; use std::{ - future::Future, - pin::Pin, - task::{Context, Poll, Waker}, + future::Future, + pin::Pin, + task::{Context, Poll, Waker}, }; /// Wrapper around [`FuturesUnordered`] that wakes a task up automatically. @@ -31,56 +31,53 @@ use std::{ /// polled when contains no futures. #[derive(Default)] pub struct FuturesStream { - futures: FuturesUnordered, - waker: Option, + futures: FuturesUnordered, + waker: Option, } impl FuturesStream { - /// Create new [`FuturesStream`]. - pub fn new() -> Self { - Self { - futures: FuturesUnordered::new(), - waker: None, - } - } + /// Create new [`FuturesStream`]. + pub fn new() -> Self { + Self { futures: FuturesUnordered::new(), waker: None } + } - /// Number of futures in the stream. - pub fn len(&self) -> usize { - self.futures.len() - } + /// Number of futures in the stream. + pub fn len(&self) -> usize { + self.futures.len() + } - /// Check if the stream is empty. - pub fn is_empty(&self) -> bool { - self.futures.is_empty() - } + /// Check if the stream is empty. + pub fn is_empty(&self) -> bool { + self.futures.is_empty() + } - /// Push a future for processing. - pub fn push(&mut self, future: F) { - self.futures.push(future); + /// Push a future for processing. + pub fn push(&mut self, future: F) { + self.futures.push(future); - if let Some(waker) = self.waker.take() { - waker.wake(); - } - } + if let Some(waker) = self.waker.take() { + waker.wake(); + } + } } impl Stream for FuturesStream { - type Item = ::Output; + type Item = ::Output; - fn poll_next(mut self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll> { - let Poll::Ready(Some(result)) = self.futures.poll_next_unpin(cx) else { - // We must save the current waker to wake up the task when new futures are inserted. - // - // Otherwise, simply returning `Poll::Pending` here would cause the task to never be - // woken up again. - // - // We were previously relying on some other task from the `loop tokio::select!` to - // finish. - self.waker = Some(cx.waker().clone()); + fn poll_next(mut self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll> { + let Poll::Ready(Some(result)) = self.futures.poll_next_unpin(cx) else { + // We must save the current waker to wake up the task when new futures are inserted. + // + // Otherwise, simply returning `Poll::Pending` here would cause the task to never be + // woken up again. + // + // We were previously relying on some other task from the `loop tokio::select!` to + // finish. + self.waker = Some(cx.waker().clone()); - return Poll::Pending; - }; + return Poll::Pending; + }; - Poll::Ready(Some(result)) - } + Poll::Ready(Some(result)) + } } diff --git a/client/litep2p/src/yamux/control.rs b/client/litep2p/src/yamux/control.rs index 2eda5ca1..c438afcf 100644 --- a/client/litep2p/src/yamux/control.rs +++ b/client/litep2p/src/yamux/control.rs @@ -11,12 +11,12 @@ use crate::yamux::{Connection, ConnectionError, Result, Stream, MAX_ACK_BACKLOG}; use futures::{ - channel::{mpsc, oneshot}, - prelude::*, + channel::{mpsc, oneshot}, + prelude::*, }; use std::{ - pin::Pin, - task::{Context, Poll}, + pin::Pin, + task::{Context, Poll}, }; const LOG_TARGET: &str = "litep2p::yamux::control"; @@ -29,216 +29,210 @@ const LOG_TARGET: &str = "litep2p::yamux::control"; /// a [`Control`] to be cloned and shared between tasks and threads. #[derive(Clone, Debug)] pub struct Control { - /// Command channel to [`ControlledConnection`]. - sender: mpsc::Sender, + /// Command channel to [`ControlledConnection`]. + sender: mpsc::Sender, } impl Control { - pub fn new(connection: Connection) -> (Self, ControlledConnection) { - let (sender, receiver) = mpsc::channel(MAX_ACK_BACKLOG); + pub fn new(connection: Connection) -> (Self, ControlledConnection) { + let (sender, receiver) = mpsc::channel(MAX_ACK_BACKLOG); - let control = Control { sender }; - let connection = ControlledConnection { - state: State::Idle(connection), - commands: receiver, - }; + let control = Control { sender }; + let connection = + ControlledConnection { state: State::Idle(connection), commands: receiver }; - (control, connection) - } + (control, connection) + } - /// Open a new stream to the remote. - pub async fn open_stream(&mut self) -> Result { - let (tx, rx) = oneshot::channel(); - self.sender.send(ControlCommand::OpenStream(tx)).await?; - rx.await? - } + /// Open a new stream to the remote. + pub async fn open_stream(&mut self) -> Result { + let (tx, rx) = oneshot::channel(); + self.sender.send(ControlCommand::OpenStream(tx)).await?; + rx.await? + } - /// Close the connection. - pub async fn close(&mut self) -> Result<()> { - let (tx, rx) = oneshot::channel(); - if self.sender.send(ControlCommand::CloseConnection(tx)).await.is_err() { - // The receiver is closed which means the connection is already closed. - return Ok(()); - } - // A dropped `oneshot::Sender` means the `Connection` is gone, - // so we do not treat receive errors differently here. - let _ = rx.await; - Ok(()) - } + /// Close the connection. + pub async fn close(&mut self) -> Result<()> { + let (tx, rx) = oneshot::channel(); + if self.sender.send(ControlCommand::CloseConnection(tx)).await.is_err() { + // The receiver is closed which means the connection is already closed. + return Ok(()); + } + // A dropped `oneshot::Sender` means the `Connection` is gone, + // so we do not treat receive errors differently here. + let _ = rx.await; + Ok(()) + } } /// Wraps a [`Connection`] which can be controlled with a [`Control`]. pub struct ControlledConnection { - state: State, - commands: mpsc::Receiver, + state: State, + commands: mpsc::Receiver, } impl ControlledConnection where - T: AsyncRead + AsyncWrite + Unpin + Send + 'static, + T: AsyncRead + AsyncWrite + Unpin + Send + 'static, { - fn poll_next(&mut self, cx: &mut Context<'_>) -> Poll>> { - loop { - match std::mem::replace(&mut self.state, State::Poisoned) { - State::Idle(mut connection) => { - match connection.poll_next_inbound(cx) { - Poll::Ready(maybe_stream) => { - // Transport layers will close the connection on the first - // substream error. The `connection.poll_next_inbound` should - // not be called again after returning an error. Instead, we - // must close the connection gracefully. - match maybe_stream.as_ref() { - Some(Err(error)) => { - tracing::debug!(target: LOG_TARGET, ?error, "Inbound stream error, closing connection"); + fn poll_next(&mut self, cx: &mut Context<'_>) -> Poll>> { + loop { + match std::mem::replace(&mut self.state, State::Poisoned) { + State::Idle(mut connection) => { + match connection.poll_next_inbound(cx) { + Poll::Ready(maybe_stream) => { + // Transport layers will close the connection on the first + // substream error. The `connection.poll_next_inbound` should + // not be called again after returning an error. Instead, we + // must close the connection gracefully. + match maybe_stream.as_ref() { + Some(Err(error)) => { + tracing::debug!(target: LOG_TARGET, ?error, "Inbound stream error, closing connection"); - self.state = State::Closing { - reply: None, - inner: Closing::DrainingControlCommands { connection }, - }; - } - other => { - tracing::debug!(target: LOG_TARGET, ?other, "Inbound stream reset state to idle"); - self.state = State::Idle(connection) - } - } + self.state = State::Closing { + reply: None, + inner: Closing::DrainingControlCommands { connection }, + }; + }, + other => { + tracing::debug!(target: LOG_TARGET, ?other, "Inbound stream reset state to idle"); + self.state = State::Idle(connection) + }, + } - return Poll::Ready(maybe_stream); - } - Poll::Pending => {} - } + return Poll::Ready(maybe_stream); + }, + Poll::Pending => {}, + } - match self.commands.poll_next_unpin(cx) { - Poll::Ready(Some(ControlCommand::OpenStream(reply))) => { - self.state = State::OpeningNewStream { reply, connection }; - continue; - } - Poll::Ready(Some(ControlCommand::CloseConnection(reply))) => { - self.commands.close(); + match self.commands.poll_next_unpin(cx) { + Poll::Ready(Some(ControlCommand::OpenStream(reply))) => { + self.state = State::OpeningNewStream { reply, connection }; + continue; + }, + Poll::Ready(Some(ControlCommand::CloseConnection(reply))) => { + self.commands.close(); - self.state = State::Closing { - reply: Some(reply), - inner: Closing::DrainingControlCommands { connection }, - }; - continue; - } - Poll::Ready(None) => { - // Last `Control` sender was dropped, close te connection. - self.state = State::Closing { - reply: None, - inner: Closing::ClosingConnection { connection }, - }; - continue; - } - Poll::Pending => {} - } + self.state = State::Closing { + reply: Some(reply), + inner: Closing::DrainingControlCommands { connection }, + }; + continue; + }, + Poll::Ready(None) => { + // Last `Control` sender was dropped, close te connection. + self.state = State::Closing { + reply: None, + inner: Closing::ClosingConnection { connection }, + }; + continue; + }, + Poll::Pending => {}, + } - self.state = State::Idle(connection); - return Poll::Pending; - } - State::OpeningNewStream { - reply, - mut connection, - } => match connection.poll_new_outbound(cx) { - Poll::Ready(stream) => { - let _ = reply.send(stream); + self.state = State::Idle(connection); + return Poll::Pending; + }, + State::OpeningNewStream { reply, mut connection } => + match connection.poll_new_outbound(cx) { + Poll::Ready(stream) => { + let _ = reply.send(stream); - self.state = State::Idle(connection); - continue; - } - Poll::Pending => { - self.state = State::OpeningNewStream { reply, connection }; - return Poll::Pending; - } - }, - State::Closing { - reply, - inner: Closing::DrainingControlCommands { connection }, - } => match self.commands.poll_next_unpin(cx) { - Poll::Ready(Some(ControlCommand::OpenStream(new_reply))) => { - let _ = new_reply.send(Err(ConnectionError::Closed)); + self.state = State::Idle(connection); + continue; + }, + Poll::Pending => { + self.state = State::OpeningNewStream { reply, connection }; + return Poll::Pending; + }, + }, + State::Closing { + reply, + inner: Closing::DrainingControlCommands { connection }, + } => match self.commands.poll_next_unpin(cx) { + Poll::Ready(Some(ControlCommand::OpenStream(new_reply))) => { + let _ = new_reply.send(Err(ConnectionError::Closed)); - self.state = State::Closing { - reply, - inner: Closing::DrainingControlCommands { connection }, - }; - continue; - } - Poll::Ready(Some(ControlCommand::CloseConnection(new_reply))) => { - let _ = new_reply.send(()); + self.state = State::Closing { + reply, + inner: Closing::DrainingControlCommands { connection }, + }; + continue; + }, + Poll::Ready(Some(ControlCommand::CloseConnection(new_reply))) => { + let _ = new_reply.send(()); - self.state = State::Closing { - reply, - inner: Closing::DrainingControlCommands { connection }, - }; - continue; - } - Poll::Ready(None) => { - self.state = State::Closing { - reply, - inner: Closing::ClosingConnection { connection }, - }; - continue; - } - Poll::Pending => { - self.state = State::Closing { - reply, - inner: Closing::DrainingControlCommands { connection }, - }; - return Poll::Pending; - } - }, - State::Closing { - reply, - inner: Closing::ClosingConnection { mut connection }, - } => match connection.poll_close(cx) { - Poll::Ready(Ok(())) | Poll::Ready(Err(ConnectionError::Closed)) => { - if let Some(reply) = reply { - let _ = reply.send(()); - } - return Poll::Ready(None); - } - Poll::Ready(Err(other)) => { - if let Some(reply) = reply { - let _ = reply.send(()); - } - return Poll::Ready(Some(Err(other))); - } - Poll::Pending => { - self.state = State::Closing { - reply, - inner: Closing::ClosingConnection { connection }, - }; - return Poll::Pending; - } - }, - State::Poisoned => return Poll::Pending, - } - } - } + self.state = State::Closing { + reply, + inner: Closing::DrainingControlCommands { connection }, + }; + continue; + }, + Poll::Ready(None) => { + self.state = State::Closing { + reply, + inner: Closing::ClosingConnection { connection }, + }; + continue; + }, + Poll::Pending => { + self.state = State::Closing { + reply, + inner: Closing::DrainingControlCommands { connection }, + }; + return Poll::Pending; + }, + }, + State::Closing { reply, inner: Closing::ClosingConnection { mut connection } } => + match connection.poll_close(cx) { + Poll::Ready(Ok(())) | Poll::Ready(Err(ConnectionError::Closed)) => { + if let Some(reply) = reply { + let _ = reply.send(()); + } + return Poll::Ready(None); + }, + Poll::Ready(Err(other)) => { + if let Some(reply) = reply { + let _ = reply.send(()); + } + return Poll::Ready(Some(Err(other))); + }, + Poll::Pending => { + self.state = State::Closing { + reply, + inner: Closing::ClosingConnection { connection }, + }; + return Poll::Pending; + }, + }, + State::Poisoned => return Poll::Pending, + } + } + } } #[derive(Debug)] enum ControlCommand { - /// Open a new stream to the remote end. - OpenStream(oneshot::Sender>), - /// Close the whole connection. - CloseConnection(oneshot::Sender<()>), + /// Open a new stream to the remote end. + OpenStream(oneshot::Sender>), + /// Close the whole connection. + CloseConnection(oneshot::Sender<()>), } /// The state of a [`ControlledConnection`]. enum State { - Idle(Connection), - OpeningNewStream { - reply: oneshot::Sender>, - connection: Connection, - }, - Closing { - /// A channel to the [`Control`] in case the close was requested. `None` if we are closing - /// because the last [`Control`] was dropped. - reply: Option>, - inner: Closing, - }, - Poisoned, + Idle(Connection), + OpeningNewStream { + reply: oneshot::Sender>, + connection: Connection, + }, + Closing { + /// A channel to the [`Control`] in case the close was requested. `None` if we are closing + /// because the last [`Control`] was dropped. + reply: Option>, + inner: Closing, + }, + Poisoned, } /// A sub-state of our larger state machine for a [`ControlledConnection`]. @@ -248,17 +242,17 @@ enum State { /// 1. Draining and answered all remaining [`Closing::DrainingControlCommands`]. /// 1. Closing the underlying [`Connection`]. enum Closing { - DrainingControlCommands { connection: Connection }, - ClosingConnection { connection: Connection }, + DrainingControlCommands { connection: Connection }, + ClosingConnection { connection: Connection }, } impl futures::Stream for ControlledConnection where - T: AsyncRead + AsyncWrite + Unpin + Send + 'static, + T: AsyncRead + AsyncWrite + Unpin + Send + 'static, { - type Item = Result; + type Item = Result; - fn poll_next(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll> { - self.get_mut().poll_next(cx) - } + fn poll_next(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll> { + self.get_mut().poll_next(cx) + } } diff --git a/client/litep2p/src/yamux/mod.rs b/client/litep2p/src/yamux/mod.rs index f2635193..e2414e36 100644 --- a/client/litep2p/src/yamux/mod.rs +++ b/client/litep2p/src/yamux/mod.rs @@ -26,8 +26,8 @@ mod control; pub use yamux::{ - Config, Connection, ConnectionError, FrameDecodeError, HeaderDecodeError, Mode, Packet, Result, - Stream, StreamId, + Config, Connection, ConnectionError, FrameDecodeError, HeaderDecodeError, Mode, Packet, Result, + Stream, StreamId, }; // Switching to the "poll" based yamux API is a massive breaking change for litep2p. diff --git a/client/network-types/Cargo.toml b/client/network-types/Cargo.toml index fbd6e8ce..4ce752a7 100644 --- a/client/network-types/Cargo.toml +++ b/client/network-types/Cargo.toml @@ -1,13 +1,16 @@ [package] -name = "sc-network-types" -version = "0.20.3" -authors = ["Parity Technologies ", "Quantus Network Developers "] -edition = "2021" +authors = [ + "Parity Technologies ", + "Quantus Network Developers ", +] description = "Substrate network types with Dilithium support" -homepage = "https://quantus.com/" documentation = "https://docs.rs/sc-network-types" +edition = "2021" +homepage = "https://quantus.com/" license = "GPL-3.0-or-later WITH Classpath-exception-2.0" +name = "sc-network-types" repository = "https://github.com/quantus-network/chain" +version = "0.20.3" [lib] name = "sc_network_types" diff --git a/client/network-types/src/dilithium.rs b/client/network-types/src/dilithium.rs index bd2c1098..2431705a 100644 --- a/client/network-types/src/dilithium.rs +++ b/client/network-types/src/dilithium.rs @@ -118,7 +118,10 @@ impl Keypair { let mut hedge = [0u8; 32]; rand::RngCore::fill_bytes(&mut rand::rngs::OsRng, &mut hedge); - internal_kp.sign(msg, None, Some(hedge)).expect("Signing should not fail").to_vec() + internal_kp + .sign(msg, None, Some(hedge)) + .expect("Signing should not fail") + .to_vec() } /// Get the public key of this keypair. diff --git a/client/network-types/src/multiaddr/protocol.rs b/client/network-types/src/multiaddr/protocol.rs index 6bed444c..549e4482 100644 --- a/client/network-types/src/multiaddr/protocol.rs +++ b/client/network-types/src/multiaddr/protocol.rs @@ -18,7 +18,7 @@ use crate::multihash::Multihash; use litep2p::types::multiaddr::Protocol as LiteP2pProtocol; -use multiaddr::{Protocol as LibP2pProtocol, PeerId as MultiAddrPeerId}; +use multiaddr::{PeerId as MultiAddrPeerId, Protocol as LibP2pProtocol}; use std::{ borrow::Cow, fmt::{self, Debug, Display}, @@ -245,29 +245,32 @@ impl<'a> From> for LibP2pProtocol<'a> { Protocol::Onion(str, port) => LibP2pProtocol::Onion(str, port), Protocol::Onion3(str, port) => LibP2pProtocol::Onion3((str.into_owned(), port).into()), Protocol::P2p(multihash) => { - LibP2pProtocol::P2p(MultiAddrPeerId::from_multihash(multihash.into()).unwrap_or_else(|mh| { - // This is better than making conversion fallible and complicating the - // client code. - log::error!( - target: LOG_TARGET, - "Received multiaddr with p2p multihash which is not a valid \ - peer_id. Using the multihash directly as identity." - ); - // Create a peer ID from the invalid multihash - this will at least preserve - // some uniqueness for debugging. The underlying multiaddr will be invalid - // but this path should rarely be hit in practice. - let bytes = mh.to_bytes(); - MultiAddrPeerId::from_bytes(&bytes).unwrap_or_else(|_| { - // Last resort: generate from random bytes using identity hash - use rand::RngCore; - let mut random_bytes = [0u8; 32]; - rand::thread_rng().fill_bytes(&mut random_bytes); - // Use identity multihash (code 0x00) with 32 random bytes - let identity_mh = multihash::Multihash::<64>::wrap(0x00, &random_bytes) - .expect("identity hash with 32 bytes always fits"); - MultiAddrPeerId::from_multihash(identity_mh).expect("identity multihash is valid peer id") - }) - })) + LibP2pProtocol::P2p( + MultiAddrPeerId::from_multihash(multihash.into()).unwrap_or_else(|mh| { + // This is better than making conversion fallible and complicating the + // client code. + log::error!( + target: LOG_TARGET, + "Received multiaddr with p2p multihash which is not a valid \ + peer_id. Using the multihash directly as identity." + ); + // Create a peer ID from the invalid multihash - this will at least preserve + // some uniqueness for debugging. The underlying multiaddr will be invalid + // but this path should rarely be hit in practice. + let bytes = mh.to_bytes(); + MultiAddrPeerId::from_bytes(&bytes).unwrap_or_else(|_| { + // Last resort: generate from random bytes using identity hash + use rand::RngCore; + let mut random_bytes = [0u8; 32]; + rand::thread_rng().fill_bytes(&mut random_bytes); + // Use identity multihash (code 0x00) with 32 random bytes + let identity_mh = multihash::Multihash::<64>::wrap(0x00, &random_bytes) + .expect("identity hash with 32 bytes always fits"); + MultiAddrPeerId::from_multihash(identity_mh) + .expect("identity multihash is valid peer id") + }) + }), + ) }, Protocol::P2pCircuit => LibP2pProtocol::P2pCircuit, Protocol::Quic => LibP2pProtocol::Quic, diff --git a/client/network-types/src/peer_id.rs b/client/network-types/src/peer_id.rs index 9d8c9a1f..26a64bc0 100644 --- a/client/network-types/src/peer_id.rs +++ b/client/network-types/src/peer_id.rs @@ -80,9 +80,8 @@ impl PeerId { pub fn from_multihash(multihash: Multihash) -> Result { match Code::try_from(multihash.code()) { Ok(Code::Sha2_256) => Ok(PeerId { multihash }), - Ok(Code::Identity) if multihash.digest().len() <= MAX_INLINE_KEY_LENGTH => { - Ok(PeerId { multihash }) - }, + Ok(Code::Identity) if multihash.digest().len() <= MAX_INLINE_KEY_LENGTH => + Ok(PeerId { multihash }), _ => Err(multihash), } } @@ -243,9 +242,8 @@ mod tests { #[test] fn from_dilithium() { let keypair = litep2p::crypto::dilithium::Keypair::generate(); - let original_peer_id = litep2p::PeerId::from_public_key( - &litep2p::crypto::PublicKey::from(keypair.public()), - ); + let original_peer_id = + litep2p::PeerId::from_public_key(&litep2p::crypto::PublicKey::from(keypair.public())); let peer_id: PeerId = original_peer_id.into(); assert_eq!(original_peer_id.to_bytes(), peer_id.to_bytes()); @@ -261,9 +259,8 @@ mod tests { #[test] fn peer_id_roundtrip() { let keypair = litep2p::crypto::dilithium::Keypair::generate(); - let litep2p_peer_id = litep2p::PeerId::from_public_key( - &litep2p::crypto::PublicKey::from(keypair.public()), - ); + let litep2p_peer_id = + litep2p::PeerId::from_public_key(&litep2p::crypto::PublicKey::from(keypair.public())); // litep2p -> substrate -> litep2p let substrate_peer_id: PeerId = litep2p_peer_id.into(); diff --git a/client/network/Cargo.toml b/client/network/Cargo.toml index 8d9257c2..381db5d8 100644 --- a/client/network/Cargo.toml +++ b/client/network/Cargo.toml @@ -37,8 +37,8 @@ fnv = { workspace = true } futures = { workspace = true } futures-timer = { workspace = true } ip_network = { workspace = true } -litep2p = { path = "../litep2p", features = ["quic", "websocket"] } linked_hash_set = { workspace = true } +litep2p = { path = "../litep2p", features = ["quic", "websocket"] } log = { workspace = true, default-features = true } mockall = { workspace = true } parking_lot = { workspace = true, default-features = true } diff --git a/client/network/src/config.rs b/client/network/src/config.rs index 33bb36d0..108f8b06 100644 --- a/client/network/src/config.rs +++ b/client/network/src/config.rs @@ -22,11 +22,13 @@ //! See the documentation of [`Params`]. pub use crate::{ - litep2p::DEFAULT_KADEMLIA_REPLICATION_FACTOR, - peer_store::PeerStoreProvider, - litep2p::shim::notification::{ - config::{NotificationProtocolConfig, ProtocolControlHandle as ProtocolHandlePair}, + litep2p::{ + shim::notification::config::{ + NotificationProtocolConfig, ProtocolControlHandle as ProtocolHandlePair, + }, + DEFAULT_KADEMLIA_REPLICATION_FACTOR, }, + peer_store::PeerStoreProvider, service::{ metrics::NotificationMetrics, traits::{NotificationConfig, NotificationService, PeerStore}, @@ -385,10 +387,9 @@ impl NodeKeyConfig { match self { Dilithium(Secret::New) => Ok(litep2p::crypto::dilithium::Keypair::generate()), - Dilithium(Secret::Input(mut k)) => { + Dilithium(Secret::Input(mut k)) => litep2p::crypto::dilithium::Keypair::try_from_bytes(&mut k) - .map_err(|e| io::Error::new(io::ErrorKind::InvalidData, format!("{e:?}"))) - } + .map_err(|e| io::Error::new(io::ErrorKind::InvalidData, format!("{e:?}"))), Dilithium(Secret::File(f)) => get_secret( f, diff --git a/client/network/src/lib.rs b/client/network/src/lib.rs index 6601c2e2..682dfb21 100644 --- a/client/network/src/lib.rs +++ b/client/network/src/lib.rs @@ -251,7 +251,8 @@ // - discovery (libp2p Kademlia - litep2p has its own in litep2p/discovery.rs) // - protocol (libp2p notifications - litep2p has its own in litep2p/shim/notification/) // - transport (libp2p transport - litep2p has its own transport) -// - request_responses (libp2p request-response - litep2p has its own in litep2p/shim/request_response/) +// - request_responses (libp2p request-response - litep2p has its own in +// litep2p/shim/request_response/) pub mod litep2p; @@ -273,12 +274,14 @@ pub mod utils; // Re-export request-response types from litep2p shim - this provides the `request_responses` module /// Request-response protocol types re-exported from the litep2p shim. pub mod request_responses { - pub use crate::litep2p::shim::request_response::{ - IncomingRequest, OutboundRequest, OutgoingResponse, RequestResponseConfig, - RequestResponseProtocol, + pub use crate::{ + litep2p::shim::request_response::{ + IncomingRequest, OutboundRequest, OutgoingResponse, RequestResponseConfig, + RequestResponseProtocol, + }, + service::traits::{IfDisconnected, OutboundFailure, RequestFailure}, }; - pub use crate::service::traits::{IfDisconnected, RequestFailure, OutboundFailure}; - + /// Type alias for compatibility with sc-service which expects this name. pub type ProtocolConfig = RequestResponseConfig; } diff --git a/client/network/src/litep2p/mod.rs b/client/network/src/litep2p/mod.rs index 3496bd8c..eb0362ea 100644 --- a/client/network/src/litep2p/mod.rs +++ b/client/network/src/litep2p/mod.rs @@ -20,8 +20,8 @@ use crate::{ config::{ - FullNetworkConfiguration, NodeKeyConfig, NotificationHandshake, Params, - SetConfig, TransportConfig, + FullNetworkConfiguration, NodeKeyConfig, NotificationHandshake, Params, SetConfig, + TransportConfig, }, error::Error, event::{DhtEvent, Event}, diff --git a/client/network/src/litep2p/service.rs b/client/network/src/litep2p/service.rs index b31009bf..181c0a05 100644 --- a/client/network/src/litep2p/service.rs +++ b/client/network/src/litep2p/service.rs @@ -26,16 +26,17 @@ use crate::{ }, network_state::NetworkState, peer_store::PeerStoreProvider, - service::out_events, - service::traits::{IfDisconnected, OutboundFailure, RequestFailure}, - Event, NetworkDHTProvider, NetworkEventStream, NetworkPeers, NetworkRequest, - NetworkSigner, NetworkStateInfo, NetworkStatus, NetworkStatusProvider, - ProtocolName, Signature, + service::{ + out_events, + traits::{IfDisconnected, OutboundFailure, RequestFailure}, + }, + Event, NetworkDHTProvider, NetworkEventStream, NetworkPeers, NetworkRequest, NetworkSigner, + NetworkStateInfo, NetworkStatus, NetworkStatusProvider, ProtocolName, Signature, }; +use crate::service::signature::SigningError; use codec::DecodeAll; use futures::{channel::oneshot, stream::BoxStream}; -use crate::service::signature::SigningError; use litep2p::{ addresses::PublicAddresses, crypto::dilithium::Keypair, types::multiaddr::Multiaddr as LiteP2pMultiaddr, diff --git a/client/network/src/litep2p/shim/request_response/mod.rs b/client/network/src/litep2p/shim/request_response/mod.rs index 892b63fd..e891a075 100644 --- a/client/network/src/litep2p/shim/request_response/mod.rs +++ b/client/network/src/litep2p/shim/request_response/mod.rs @@ -22,7 +22,13 @@ use crate::{ litep2p::shim::request_response::metrics::RequestResponseMetrics, peer_store::PeerStoreProvider, - service::{metrics::Metrics, traits::{IfDisconnected, OutboundFailure, RequestFailure, RequestResponseConfig as RequestResponseConfigT}}, + service::{ + metrics::Metrics, + traits::{ + IfDisconnected, OutboundFailure, RequestFailure, + RequestResponseConfig as RequestResponseConfigT, + }, + }, ProtocolName, }; diff --git a/client/network/src/peer_store.rs b/client/network/src/peer_store.rs index 4385fc09..d5442015 100644 --- a/client/network/src/peer_store.rs +++ b/client/network/src/peer_store.rs @@ -21,12 +21,12 @@ use crate::service::{metrics::PeerStoreMetrics, traits::PeerStore as PeerStoreT}; -use sc_network_types::PeerId; use log::trace; use parking_lot::Mutex; use partial_sort::PartialSort; use prometheus_endpoint::Registry; use sc_network_common::{role::ObservedRole, types::ReputationChange}; +use sc_network_types::PeerId; use std::{ cmp::{Ord, Ordering, PartialOrd}, collections::{hash_map::Entry, HashMap, HashSet}, @@ -143,9 +143,7 @@ impl PeerStoreProvider for PeerStoreHandle { count: usize, ignored: HashSet, ) -> Vec { - self.inner - .lock() - .outgoing_candidates(count, ignored) + self.inner.lock().outgoing_candidates(count, ignored) } fn add_known_peer(&self, peer_id: sc_network_types::PeerId) { diff --git a/client/network/src/protocol_controller.rs b/client/network/src/protocol_controller.rs index c61f4331..340cc809 100644 --- a/client/network/src/protocol_controller.rs +++ b/client/network/src/protocol_controller.rs @@ -44,8 +44,8 @@ use crate::peer_store::{PeerStoreProvider, ProtocolHandle as ProtocolHandleT}; use futures::{channel::oneshot, future::Either, FutureExt, StreamExt}; -use sc_network_types::PeerId; use log::{debug, error, trace, warn}; +use sc_network_types::PeerId; use sc_utils::mpsc::{tracing_unbounded, TracingUnboundedReceiver, TracingUnboundedSender}; use sp_arithmetic::traits::SaturatedConversion; use std::{ @@ -812,9 +812,7 @@ impl ProtocolController { .keys() .cloned() .collect::>() - .union( - &self.nodes.keys().cloned().collect::>(), - ) + .union(&self.nodes.keys().cloned().collect::>()) .cloned() .collect(); diff --git a/client/network/src/service/signature.rs b/client/network/src/service/signature.rs index be71e208..3d3e22d0 100644 --- a/client/network/src/service/signature.rs +++ b/client/network/src/service/signature.rs @@ -21,10 +21,7 @@ //! Signature-related code for litep2p network backend. -use litep2p::crypto::{ - PublicKey as Litep2pPublicKey, - dilithium::Keypair as DilithiumKeypair, -}; +use litep2p::crypto::{dilithium::Keypair as DilithiumKeypair, PublicKey as Litep2pPublicKey}; /// Error during signing of a message. #[derive(Debug, thiserror::Error)] diff --git a/node/src/command.rs b/node/src/command.rs index 7e74a9c0..e4c3b7f5 100644 --- a/node/src/command.rs +++ b/node/src/command.rs @@ -587,9 +587,7 @@ pub fn run() -> sc_cli::Result<()> { let allow_mining_without_peers = config.force_authoring; log::info!("Using litep2p network backend (with Dilithium)"); - service::new_full::< - sc_network::litep2p::Litep2pNetworkBackend, - >( + service::new_full::( config, rewards_account, cli.miner_listen_port, From bc0f44a6ad075412d2ebaaeb9237f53cdffc69db Mon Sep 17 00:00:00 2001 From: illuzen Date: Sat, 30 May 2026 23:30:59 +0900 Subject: [PATCH 15/26] remove unused workspace deps: x25519-dalek, rustls-pki-types --- Cargo.toml | 2 -- 1 file changed, 2 deletions(-) diff --git a/Cargo.toml b/Cargo.toml index 1000bf89..f8308438 100644 --- a/Cargo.toml +++ b/Cargo.toml @@ -132,7 +132,6 @@ uuid = { version = "1.7.0", features = ["serde", "v4"] } void = { version = "1.0.2" } wasm-timer = { version = "0.2.5" } webpki = { version = "0.22.4" } -x25519-dalek = { version = "2.0.1" } x509-parser = { version = "0.17.0" } yamux = { version = "0.13.9" } yasna = { version = "0.5.0" } @@ -202,7 +201,6 @@ quinn = { version = "0.11.9", default-features = false } rcgen = { version = "0.14.5", default-features = false } ring = { version = "0.17.14" } rustls = { version = "0.23.32", default-features = false } -rustls-pki-types = { version = "1.12" } rustls-post-quantum = { version = "0.2.4" } sc-basic-authorship = { version = "0.53.0", default-features = false } sc-block-builder = { version = "0.48.0", default-features = true } From c17d198ac2c32c48d917a720dac101a55db073bc Mon Sep 17 00:00:00 2001 From: illuzen Date: Mon, 1 Jun 2026 11:28:17 +0800 Subject: [PATCH 16/26] fix: store only seed in Dilithium keypair, derive public key on demand Addresses audit finding: 'Stored public key unchecked' Previously, Keypair stored both seed and public key bytes. When loading from file, a corrupted public key could cause the advertised PeerId to differ from the key actually used for signatures and Noise handshakes. Now Keypair stores only the 32-byte seed. The public key is derived deterministically on demand via derive_internal(). This eliminates the possibility of inconsistency between stored and derived public keys. For backwards compatibility, try_from_bytes() still accepts the old format (seed + public key) but ignores the public key bytes and regenerates from seed. to_bytes() now returns only the 32-byte seed, reducing stored key size from 2624 bytes to 32 bytes. --- client/litep2p/src/crypto/dilithium.rs | 81 +++++++++++++------------- client/network-types/src/dilithium.rs | 68 ++++++++------------- 2 files changed, 65 insertions(+), 84 deletions(-) diff --git a/client/litep2p/src/crypto/dilithium.rs b/client/litep2p/src/crypto/dilithium.rs index b9a3fa9b..5af02c7e 100644 --- a/client/litep2p/src/crypto/dilithium.rs +++ b/client/litep2p/src/crypto/dilithium.rs @@ -40,14 +40,12 @@ pub const SEED_BYTES: usize = 32; /// A Dilithium ML-DSA-87 keypair. /// -/// Internally stores the 32-byte seed and the public key. -/// The full secret key is derived on-demand when signing. +/// Internally stores only the 32-byte seed. +/// The public key and secret key are derived on-demand. #[derive(Clone)] pub struct Keypair { /// The seed used to generate the keypair (32 bytes). seed: [u8; SEED_BYTES], - /// The public key. - public: ml_dsa_87::PublicKey, } impl Keypair { @@ -56,45 +54,34 @@ impl Keypair { Keypair::from(SecretKey::generate()) } + /// Derive the internal keypair from the seed. + fn derive_internal(&self) -> ml_dsa_87::Keypair { + let mut seed_copy = self.seed; + let sensitive_seed = SensitiveBytes32::from(&mut seed_copy); + ml_dsa_87::Keypair::generate(sensitive_seed) + } + /// Convert the keypair into a byte array. /// - /// Returns the 32-byte seed concatenated with the public key bytes. - /// Format: [seed (32 bytes)][public key (2592 bytes)] + /// Returns the 32-byte seed only. The public key is deterministically + /// derived from the seed, so storing it separately is unnecessary. pub fn to_bytes(&self) -> Vec { - let mut bytes = Vec::with_capacity(SEED_BYTES + PUBLIC_KEY_BYTES); - bytes.extend_from_slice(&self.seed); - bytes.extend_from_slice(&self.public.to_bytes()); - bytes + self.seed.to_vec() } /// Try to parse a keypair from bytes, zeroing the input on success. /// /// Accepts either: - /// - 32 bytes (seed only) - public key will be regenerated - /// - 32 + 2592 bytes (seed + public key) + /// - 32 bytes (seed only) + /// - 32 + 2592 bytes (seed + public key) - public key bytes are ignored, + /// the key is regenerated from seed for consistency pub fn try_from_bytes(kp: &mut [u8]) -> Result { - if kp.len() == SEED_BYTES { - // Seed only - regenerate the keypair - let mut seed = [0u8; SEED_BYTES]; - seed.copy_from_slice(kp); - kp.zeroize(); - - let sensitive_seed = SensitiveBytes32::from(&mut seed.clone()); - let internal_kp = ml_dsa_87::Keypair::generate(sensitive_seed); - - Ok(Keypair { seed, public: internal_kp.public }) - } else if kp.len() == SEED_BYTES + PUBLIC_KEY_BYTES { - // Full keypair + if kp.len() == SEED_BYTES || kp.len() == SEED_BYTES + PUBLIC_KEY_BYTES { let mut seed = [0u8; SEED_BYTES]; seed.copy_from_slice(&kp[..SEED_BYTES]); - - let public = ml_dsa_87::PublicKey::from_bytes(&kp[SEED_BYTES..]).map_err(|e| { - Error::Other(format!("Failed to parse Dilithium public key: {e:?}")) - })?; - kp.zeroize(); - Ok(Keypair { seed, public }) + Ok(Keypair { seed }) } else { Err(Error::Other(format!( "Invalid Dilithium keypair length: expected {} or {} bytes, got {}", @@ -107,10 +94,7 @@ impl Keypair { /// Sign a message using the private key of this keypair. pub fn sign(&self, msg: &[u8]) -> Vec { - // Regenerate the full keypair from seed for signing - let mut seed_copy = self.seed; - let sensitive_seed = SensitiveBytes32::from(&mut seed_copy); - let internal_kp = ml_dsa_87::Keypair::generate(sensitive_seed); + let internal_kp = self.derive_internal(); // Sign without context, with hedged randomness for side-channel protection let mut hedge = [0u8; 32]; @@ -124,7 +108,7 @@ impl Keypair { /// Get the public key of this keypair. pub fn public(&self) -> PublicKey { - PublicKey(self.public.clone()) + PublicKey(self.derive_internal().public) } /// Get the secret key (seed) of this keypair. @@ -135,7 +119,7 @@ impl Keypair { impl fmt::Debug for Keypair { fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { - f.debug_struct("Keypair").field("public", &self.public).finish_non_exhaustive() + f.debug_struct("Keypair").field("public", &self.public()).finish_non_exhaustive() } } @@ -149,11 +133,7 @@ impl From for SecretKey { /// Promote a Dilithium secret key (seed) into a keypair. impl From for Keypair { fn from(sk: SecretKey) -> Keypair { - let mut seed_copy = sk.0; - let sensitive_seed = SensitiveBytes32::from(&mut seed_copy); - let internal_kp = ml_dsa_87::Keypair::generate(sensitive_seed); - - Keypair { seed: sk.0, public: internal_kp.public } + Keypair { seed: sk.0 } } } @@ -326,4 +306,23 @@ mod tests { assert!(!sk_bytes.iter().all(|b| *b == 0)); // Drop happens automatically } + + #[test] + fn dilithium_keypair_ignores_corrupted_public_key() { + // Create a keypair and get its seed + let kp1 = Keypair::generate(); + let seed = kp1.seed; + + // Create corrupted "old format" data: seed + garbage public key + let mut corrupted = Vec::with_capacity(SEED_BYTES + PUBLIC_KEY_BYTES); + corrupted.extend_from_slice(&seed); + // Fill with garbage instead of real public key + corrupted.extend_from_slice(&[0xAB; PUBLIC_KEY_BYTES]); + + // Parse should succeed and derive correct public key from seed + let kp2 = Keypair::try_from_bytes(&mut corrupted).unwrap(); + + // Public keys should match (derived from seed, not from corrupted bytes) + assert_eq!(kp1.public(), kp2.public()); + } } diff --git a/client/network-types/src/dilithium.rs b/client/network-types/src/dilithium.rs index 2431705a..23bfd0a9 100644 --- a/client/network-types/src/dilithium.rs +++ b/client/network-types/src/dilithium.rs @@ -40,14 +40,12 @@ pub const SEED_BYTES: usize = 32; /// A Dilithium ML-DSA-87 keypair. /// -/// Internally stores the 32-byte seed and the public key. -/// The full secret key is derived on-demand when signing. +/// Internally stores only the 32-byte seed. +/// The public key and secret key are derived on-demand. #[derive(Clone)] pub struct Keypair { /// The seed used to generate the keypair (32 bytes). seed: [u8; SEED_BYTES], - /// The public key. - public: ml_dsa_87::PublicKey, } impl Keypair { @@ -56,44 +54,34 @@ impl Keypair { Keypair::from(SecretKey::generate()) } + /// Derive the internal keypair from the seed. + fn derive_internal(&self) -> ml_dsa_87::Keypair { + let mut seed_copy = self.seed; + let sensitive_seed = SensitiveBytes32::from(&mut seed_copy); + ml_dsa_87::Keypair::generate(sensitive_seed) + } + /// Convert the keypair into a byte array. /// - /// Returns the 32-byte seed concatenated with the public key bytes. - /// Format: [seed (32 bytes)][public key (2592 bytes)] + /// Returns the 32-byte seed only. The public key is deterministically + /// derived from the seed, so storing it separately is unnecessary. pub fn to_bytes(&self) -> Vec { - let mut bytes = Vec::with_capacity(SEED_BYTES + PUBLIC_KEY_BYTES); - bytes.extend_from_slice(&self.seed); - bytes.extend_from_slice(&self.public.to_bytes()); - bytes + self.seed.to_vec() } /// Try to parse a keypair from bytes, zeroing the input on success. /// /// Accepts either: - /// - 32 bytes (seed only) - public key will be regenerated - /// - 32 + 2592 bytes (seed + public key) + /// - 32 bytes (seed only) + /// - 32 + 2592 bytes (seed + public key) - public key bytes are ignored, + /// the key is regenerated from seed for consistency pub fn try_from_bytes(kp: &mut [u8]) -> Result { - if kp.len() == SEED_BYTES { - // Seed only - regenerate the keypair - let mut seed = [0u8; SEED_BYTES]; - seed.copy_from_slice(kp); - kp.zeroize(); - - let sensitive_seed = SensitiveBytes32::from(&mut seed.clone()); - let internal_kp = ml_dsa_87::Keypair::generate(sensitive_seed); - - Ok(Keypair { seed, public: internal_kp.public }) - } else if kp.len() == SEED_BYTES + PUBLIC_KEY_BYTES { - // Full keypair + if kp.len() == SEED_BYTES || kp.len() == SEED_BYTES + PUBLIC_KEY_BYTES { let mut seed = [0u8; SEED_BYTES]; seed.copy_from_slice(&kp[..SEED_BYTES]); - - let public = ml_dsa_87::PublicKey::from_bytes(&kp[SEED_BYTES..]) - .map_err(|e| DecodingError::KeypairParseError(format!("{e:?}").into()))?; - kp.zeroize(); - Ok(Keypair { seed, public }) + Ok(Keypair { seed }) } else { Err(DecodingError::KeypairParseError(Box::new(std::io::Error::new( std::io::ErrorKind::InvalidData, @@ -109,10 +97,7 @@ impl Keypair { /// Sign a message using the private key of this keypair. pub fn sign(&self, msg: &[u8]) -> Vec { - // Regenerate the full keypair from seed for signing - let mut seed_copy = self.seed; - let sensitive_seed = SensitiveBytes32::from(&mut seed_copy); - let internal_kp = ml_dsa_87::Keypair::generate(sensitive_seed); + let internal_kp = self.derive_internal(); // Sign without context, with hedged randomness for side-channel protection let mut hedge = [0u8; 32]; @@ -126,7 +111,7 @@ impl Keypair { /// Get the public key of this keypair. pub fn public(&self) -> PublicKey { - PublicKey(self.public.clone()) + PublicKey(self.derive_internal().public) } /// Get the secret key (seed) of this keypair. @@ -137,7 +122,7 @@ impl Keypair { impl fmt::Debug for Keypair { fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { - f.debug_struct("Keypair").field("public", &self.public).finish_non_exhaustive() + f.debug_struct("Keypair").field("public", &self.public()).finish_non_exhaustive() } } @@ -165,11 +150,7 @@ impl From for SecretKey { /// Promote a Dilithium secret key (seed) into a keypair. impl From for Keypair { fn from(sk: SecretKey) -> Keypair { - let mut seed_copy = sk.0; - let sensitive_seed = SensitiveBytes32::from(&mut seed_copy); - let internal_kp = ml_dsa_87::Keypair::generate(sensitive_seed); - - Keypair { seed: sk.0, public: internal_kp.public } + Keypair { seed: sk.0 } } } @@ -376,10 +357,10 @@ mod tests { #[test] fn substrate_kp_to_litep2p() { let kp = Keypair::generate(); - let kp_bytes = kp.to_bytes(); let kp1: litep2p_dilithium::Keypair = kp.clone().into(); - assert_eq!(kp_bytes, kp1.to_bytes()); + // Public keys should match (both derived from same seed) + assert_eq!(kp.public().to_bytes(), kp1.public().to_bytes()); let msg = "hello world".as_bytes(); let sig = kp.sign(msg); @@ -401,7 +382,8 @@ mod tests { let kp1: Keypair = kp.clone().into(); let kp2 = Keypair::try_from_bytes(&mut kp.to_bytes()).unwrap(); - assert_eq!(kp.to_bytes(), kp1.to_bytes()); + // Public keys should match (both derived from same seed) + assert_eq!(kp.public().to_bytes(), kp1.public().to_bytes()); let msg = "hello world".as_bytes(); let sig = kp.sign(msg); From b9bdcfa0ad1c041a0c7181a839859be6488c7794 Mon Sep 17 00:00:00 2001 From: illuzen Date: Mon, 1 Jun 2026 11:35:02 +0800 Subject: [PATCH 17/26] cleanup key serialization --- Cargo.lock | 2 - client/litep2p/src/crypto/dilithium.rs | 50 +-- client/network-types/Cargo.toml | 2 - client/network-types/src/dilithium.rs | 464 ------------------------- client/network-types/src/lib.rs | 1 - 5 files changed, 15 insertions(+), 504 deletions(-) delete mode 100644 client/network-types/src/dilithium.rs diff --git a/Cargo.lock b/Cargo.lock index 523757fd..79839ac3 100644 --- a/Cargo.lock +++ b/Cargo.lock @@ -9951,12 +9951,10 @@ dependencies = [ "log", "multiaddr 0.18.2", "multihash 0.19.3", - "qp-rusty-crystals-dilithium", "quickcheck", "rand 0.8.5", "serde_with", "thiserror 1.0.69", - "zeroize", ] [[package]] diff --git a/client/litep2p/src/crypto/dilithium.rs b/client/litep2p/src/crypto/dilithium.rs index 5af02c7e..7e432094 100644 --- a/client/litep2p/src/crypto/dilithium.rs +++ b/client/litep2p/src/crypto/dilithium.rs @@ -69,27 +69,26 @@ impl Keypair { self.seed.to_vec() } + /// Create a keypair from a 32-byte seed, zeroing the input. + pub fn from_seed(mut seed: [u8; SEED_BYTES]) -> Keypair { + let kp = Keypair { seed }; + seed.zeroize(); + kp + } + /// Try to parse a keypair from bytes, zeroing the input on success. /// - /// Accepts either: - /// - 32 bytes (seed only) - /// - 32 + 2592 bytes (seed + public key) - public key bytes are ignored, - /// the key is regenerated from seed for consistency + /// Expects exactly 32 bytes (seed). pub fn try_from_bytes(kp: &mut [u8]) -> Result { - if kp.len() == SEED_BYTES || kp.len() == SEED_BYTES + PUBLIC_KEY_BYTES { - let mut seed = [0u8; SEED_BYTES]; - seed.copy_from_slice(&kp[..SEED_BYTES]); - kp.zeroize(); - - Ok(Keypair { seed }) - } else { - Err(Error::Other(format!( - "Invalid Dilithium keypair length: expected {} or {} bytes, got {}", + let seed: [u8; SEED_BYTES] = kp.try_into().map_err(|_| { + Error::Other(format!( + "Invalid Dilithium seed length: expected {} bytes, got {}", SEED_BYTES, - SEED_BYTES + PUBLIC_KEY_BYTES, kp.len() - ))) - } + )) + })?; + kp.zeroize(); + Ok(Keypair { seed }) } /// Sign a message using the private key of this keypair. @@ -306,23 +305,4 @@ mod tests { assert!(!sk_bytes.iter().all(|b| *b == 0)); // Drop happens automatically } - - #[test] - fn dilithium_keypair_ignores_corrupted_public_key() { - // Create a keypair and get its seed - let kp1 = Keypair::generate(); - let seed = kp1.seed; - - // Create corrupted "old format" data: seed + garbage public key - let mut corrupted = Vec::with_capacity(SEED_BYTES + PUBLIC_KEY_BYTES); - corrupted.extend_from_slice(&seed); - // Fill with garbage instead of real public key - corrupted.extend_from_slice(&[0xAB; PUBLIC_KEY_BYTES]); - - // Parse should succeed and derive correct public key from seed - let kp2 = Keypair::try_from_bytes(&mut corrupted).unwrap(); - - // Public keys should match (derived from seed, not from corrupted bytes) - assert_eq!(kp1.public(), kp2.public()); - } } diff --git a/client/network-types/Cargo.toml b/client/network-types/Cargo.toml index 4ce752a7..130d75df 100644 --- a/client/network-types/Cargo.toml +++ b/client/network-types/Cargo.toml @@ -23,11 +23,9 @@ litep2p = { workspace = true } log = { workspace = true } multiaddr = "0.18.1" multihash = { version = "0.19.1", default-features = false } -qp-rusty-crystals-dilithium = { workspace = true } rand = { workspace = true } serde_with = { version = "3.12.0", default-features = false, features = ["hex", "macros"] } thiserror = { workspace = true } -zeroize = { workspace = true } [dev-dependencies] quickcheck = "1.0.3" diff --git a/client/network-types/src/dilithium.rs b/client/network-types/src/dilithium.rs deleted file mode 100644 index 23bfd0a9..00000000 --- a/client/network-types/src/dilithium.rs +++ /dev/null @@ -1,464 +0,0 @@ -// This file is part of Substrate. - -// Copyright (C) Parity Technologies (UK) Ltd. -// Copyright (C) Quantus Network Developers -// SPDX-License-Identifier: GPL-3.0-or-later WITH Classpath-exception-2.0 - -// This program is free software: you can redistribute it and/or modify -// it under the terms of the GNU General Public License as published by -// the Free Software Foundation, either version 3 of the License, or -// (at your option) any later version. - -// This program is distributed in the hope that it will be useful, -// but WITHOUT ANY WARRANTY; without even the implied warranty of -// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the -// GNU General Public License for more details. - -// You should have received a copy of the GNU General Public License -// along with this program. If not, see . - -//! Dilithium ML-DSA-87 keys for post-quantum cryptography. -//! -//! This module provides type conversions between: -//! - Substrate's Dilithium types (this module) -//! - litep2p's Dilithium types - -use crate::PeerId; -use core::{cmp, fmt, hash}; -use litep2p::crypto::dilithium as litep2p_dilithium; -use qp_rusty_crystals_dilithium::{ml_dsa_87, SensitiveBytes32}; -use zeroize::Zeroize; - -/// Size of the Dilithium public key in bytes. -pub const PUBLIC_KEY_BYTES: usize = ml_dsa_87::PUBLICKEYBYTES; - -/// Size of the Dilithium signature in bytes. -pub const SIGNATURE_BYTES: usize = ml_dsa_87::SIGNBYTES; - -/// Size of the seed used to generate a keypair (32 bytes). -pub const SEED_BYTES: usize = 32; - -/// A Dilithium ML-DSA-87 keypair. -/// -/// Internally stores only the 32-byte seed. -/// The public key and secret key are derived on-demand. -#[derive(Clone)] -pub struct Keypair { - /// The seed used to generate the keypair (32 bytes). - seed: [u8; SEED_BYTES], -} - -impl Keypair { - /// Generate a new random Dilithium keypair. - pub fn generate() -> Keypair { - Keypair::from(SecretKey::generate()) - } - - /// Derive the internal keypair from the seed. - fn derive_internal(&self) -> ml_dsa_87::Keypair { - let mut seed_copy = self.seed; - let sensitive_seed = SensitiveBytes32::from(&mut seed_copy); - ml_dsa_87::Keypair::generate(sensitive_seed) - } - - /// Convert the keypair into a byte array. - /// - /// Returns the 32-byte seed only. The public key is deterministically - /// derived from the seed, so storing it separately is unnecessary. - pub fn to_bytes(&self) -> Vec { - self.seed.to_vec() - } - - /// Try to parse a keypair from bytes, zeroing the input on success. - /// - /// Accepts either: - /// - 32 bytes (seed only) - /// - 32 + 2592 bytes (seed + public key) - public key bytes are ignored, - /// the key is regenerated from seed for consistency - pub fn try_from_bytes(kp: &mut [u8]) -> Result { - if kp.len() == SEED_BYTES || kp.len() == SEED_BYTES + PUBLIC_KEY_BYTES { - let mut seed = [0u8; SEED_BYTES]; - seed.copy_from_slice(&kp[..SEED_BYTES]); - kp.zeroize(); - - Ok(Keypair { seed }) - } else { - Err(DecodingError::KeypairParseError(Box::new(std::io::Error::new( - std::io::ErrorKind::InvalidData, - format!( - "Invalid Dilithium keypair length: expected {} or {} bytes, got {}", - SEED_BYTES, - SEED_BYTES + PUBLIC_KEY_BYTES, - kp.len() - ), - )))) - } - } - - /// Sign a message using the private key of this keypair. - pub fn sign(&self, msg: &[u8]) -> Vec { - let internal_kp = self.derive_internal(); - - // Sign without context, with hedged randomness for side-channel protection - let mut hedge = [0u8; 32]; - rand::RngCore::fill_bytes(&mut rand::rngs::OsRng, &mut hedge); - - internal_kp - .sign(msg, None, Some(hedge)) - .expect("Signing should not fail") - .to_vec() - } - - /// Get the public key of this keypair. - pub fn public(&self) -> PublicKey { - PublicKey(self.derive_internal().public) - } - - /// Get the secret key (seed) of this keypair. - pub fn secret(&self) -> SecretKey { - SecretKey(self.seed) - } -} - -impl fmt::Debug for Keypair { - fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { - f.debug_struct("Keypair").field("public", &self.public()).finish_non_exhaustive() - } -} - -impl From for Keypair { - fn from(kp: litep2p_dilithium::Keypair) -> Self { - Self::try_from_bytes(&mut kp.to_bytes()) - .expect("litep2p Dilithium keypair to use the same format") - } -} - -impl From for litep2p_dilithium::Keypair { - fn from(kp: Keypair) -> Self { - Self::try_from_bytes(&mut kp.to_bytes()) - .expect("Substrate Dilithium keypair to use the same format") - } -} - -/// Demote a Dilithium keypair to a secret key (seed). -impl From for SecretKey { - fn from(kp: Keypair) -> SecretKey { - SecretKey(kp.seed) - } -} - -/// Promote a Dilithium secret key (seed) into a keypair. -impl From for Keypair { - fn from(sk: SecretKey) -> Keypair { - Keypair { seed: sk.0 } - } -} - -/// A Dilithium ML-DSA-87 public key. -#[derive(Eq, Clone)] -pub struct PublicKey(ml_dsa_87::PublicKey); - -impl fmt::Debug for PublicKey { - fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { - f.write_str("PublicKey(Dilithium): ")?; - // Only show first 8 bytes for readability - for byte in &self.0.bytes[..8] { - write!(f, "{byte:02x}")?; - } - write!(f, "...")?; - Ok(()) - } -} - -impl cmp::PartialEq for PublicKey { - fn eq(&self, other: &Self) -> bool { - self.0.bytes.eq(&other.0.bytes) - } -} - -impl hash::Hash for PublicKey { - fn hash(&self, state: &mut H) { - self.0.bytes.hash(state); - } -} - -impl cmp::PartialOrd for PublicKey { - fn partial_cmp(&self, other: &Self) -> Option { - Some(self.cmp(other)) - } -} - -impl cmp::Ord for PublicKey { - fn cmp(&self, other: &Self) -> cmp::Ordering { - self.0.bytes.cmp(&other.0.bytes) - } -} - -impl PublicKey { - /// Verify the Dilithium signature on a message using the public key. - pub fn verify(&self, msg: &[u8], sig: &[u8]) -> bool { - self.0.verify(msg, sig, None) - } - - /// Convert the public key to a byte array. - pub fn to_bytes(&self) -> Vec { - self.0.to_bytes().to_vec() - } - - /// Try to parse a public key from a byte slice. - pub fn try_from_bytes(k: &[u8]) -> Result { - ml_dsa_87::PublicKey::from_bytes(k) - .map(PublicKey) - .map_err(|e| DecodingError::PublicKeyParseError(format!("{e:?}").into())) - } - - /// Convert public key to `PeerId`. - pub fn to_peer_id(&self) -> PeerId { - let litep2p_pk: litep2p_dilithium::PublicKey = self.clone().into(); - let public_key = litep2p::crypto::PublicKey::from(litep2p_pk); - litep2p::PeerId::from_public_key(&public_key).into() - } -} - -impl From for PublicKey { - fn from(k: litep2p_dilithium::PublicKey) -> Self { - Self::try_from_bytes(&k.to_bytes()).expect("litep2p Dilithium public key to parse") - } -} - -impl From for litep2p_dilithium::PublicKey { - fn from(k: PublicKey) -> Self { - Self::try_from_bytes(&k.to_bytes()).expect("Substrate Dilithium public key to parse") - } -} - -/// A Dilithium secret key (stored as 32-byte seed). -#[derive(Clone)] -pub struct SecretKey([u8; SEED_BYTES]); - -/// View the bytes of the secret key (seed). -impl AsRef<[u8]> for SecretKey { - fn as_ref(&self) -> &[u8] { - &self.0[..] - } -} - -impl fmt::Debug for SecretKey { - fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { - write!(f, "SecretKey(Dilithium)") - } -} - -impl SecretKey { - /// Generate a new Dilithium secret key (seed). - pub fn generate() -> SecretKey { - let mut seed = [0u8; SEED_BYTES]; - rand::RngCore::fill_bytes(&mut rand::rngs::OsRng, &mut seed); - SecretKey(seed) - } - - /// Try to parse a Dilithium secret key from a byte slice, - /// zeroing the input on success. - pub fn try_from_bytes(mut sk_bytes: impl AsMut<[u8]>) -> Result { - let sk_bytes = sk_bytes.as_mut(); - let secret = <[u8; SEED_BYTES]>::try_from(&*sk_bytes) - .map_err(|e| DecodingError::SecretKeyParseError(Box::new(e)))?; - sk_bytes.zeroize(); - Ok(SecretKey(secret)) - } - - /// Convert this secret key to a byte array. - pub fn to_bytes(&self) -> [u8; SEED_BYTES] { - self.0 - } -} - -impl Drop for SecretKey { - fn drop(&mut self) { - self.0.zeroize(); - } -} - -impl From for SecretKey { - fn from(sk: litep2p_dilithium::SecretKey) -> Self { - Self::try_from_bytes(&mut sk.to_bytes()).expect("Dilithium seed to be 32 bytes") - } -} - -impl From for litep2p_dilithium::SecretKey { - fn from(sk: SecretKey) -> Self { - Self::try_from_bytes(&mut sk.to_bytes()) - .expect("litep2p `SecretKey` to accept 32 bytes as Dilithium seed") - } -} - -/// Error when decoding Dilithium-related types. -#[derive(Debug, thiserror::Error)] -pub enum DecodingError { - #[error("failed to parse Dilithium keypair: {0}")] - KeypairParseError(Box), - #[error("failed to parse Dilithium secret key: {0}")] - SecretKeyParseError(Box), - #[error("failed to parse Dilithium public key: {0}")] - PublicKeyParseError(Box), -} - -#[cfg(test)] -mod tests { - use super::*; - - fn eq_keypairs(kp1: &Keypair, kp2: &Keypair) -> bool { - kp1.public() == kp2.public() && kp1.seed == kp2.seed - } - - #[test] - fn dilithium_keypair_encode_decode() { - let kp1 = Keypair::generate(); - let mut kp1_enc = kp1.to_bytes(); - let kp2 = Keypair::try_from_bytes(&mut kp1_enc).unwrap(); - assert!(eq_keypairs(&kp1, &kp2)); - // Verify the bytes were zeroized - assert!(kp1_enc.iter().all(|b| *b == 0)); - } - - #[test] - fn dilithium_keypair_from_seed_only() { - let kp1 = Keypair::generate(); - let mut seed = kp1.secret().to_bytes().to_vec(); - let kp2 = Keypair::try_from_bytes(&mut seed[..]).unwrap(); - assert!(eq_keypairs(&kp1, &kp2)); - } - - #[test] - fn dilithium_keypair_from_secret() { - let kp1 = Keypair::generate(); - let sk = kp1.secret(); - let kp2 = Keypair::from(sk); - assert!(eq_keypairs(&kp1, &kp2)); - } - - #[test] - fn dilithium_signature() { - let kp = Keypair::generate(); - let pk = kp.public(); - - let msg = "hello world".as_bytes(); - let sig = kp.sign(msg); - assert!(pk.verify(msg, &sig)); - - let mut invalid_sig = sig.clone(); - invalid_sig[3..6].copy_from_slice(&[10, 23, 42]); - assert!(!pk.verify(msg, &invalid_sig)); - - let invalid_msg = "h3ll0 w0rld".as_bytes(); - assert!(!pk.verify(invalid_msg, &sig)); - } - - #[test] - fn substrate_kp_to_litep2p() { - let kp = Keypair::generate(); - let kp1: litep2p_dilithium::Keypair = kp.clone().into(); - - // Public keys should match (both derived from same seed) - assert_eq!(kp.public().to_bytes(), kp1.public().to_bytes()); - - let msg = "hello world".as_bytes(); - let sig = kp.sign(msg); - let sig1 = kp1.sign(msg); - - // Note: Dilithium signatures include randomness, so we verify instead of comparing - let pk = kp.public(); - let pk1 = kp1.public(); - - assert!(pk.verify(msg, &sig)); - assert!(pk.verify(msg, &sig1)); - assert!(pk1.verify(msg, &sig)); - assert!(pk1.verify(msg, &sig1)); - } - - #[test] - fn litep2p_kp_to_substrate_kp() { - let kp = litep2p_dilithium::Keypair::generate(); - let kp1: Keypair = kp.clone().into(); - let kp2 = Keypair::try_from_bytes(&mut kp.to_bytes()).unwrap(); - - // Public keys should match (both derived from same seed) - assert_eq!(kp.public().to_bytes(), kp1.public().to_bytes()); - - let msg = "hello world".as_bytes(); - let sig = kp.sign(msg); - - let pk1 = kp1.public(); - let pk2 = kp2.public(); - - assert!(pk1.verify(msg, &sig)); - assert!(pk2.verify(msg, &sig)); - } - - #[test] - fn substrate_pk_to_litep2p() { - let kp = Keypair::generate(); - let pk = kp.public(); - let pk_bytes = pk.to_bytes(); - let pk1: litep2p_dilithium::PublicKey = pk.clone().into(); - - assert_eq!(pk_bytes, pk1.to_bytes()); - - let msg = "hello world".as_bytes(); - let sig = kp.sign(msg); - - assert!(pk.verify(msg, &sig)); - assert!(pk1.verify(msg, &sig)); - } - - #[test] - fn litep2p_pk_to_substrate_pk() { - let kp = litep2p_dilithium::Keypair::generate(); - let pk = kp.public(); - let pk_bytes = pk.clone().to_bytes(); - let pk1: PublicKey = pk.clone().into(); - let pk2 = PublicKey::try_from_bytes(&pk_bytes).unwrap(); - - assert_eq!(pk_bytes, pk1.to_bytes()); - - let msg = "hello world".as_bytes(); - let sig = kp.sign(msg); - - assert!(pk.verify(msg, &sig)); - assert!(pk1.verify(msg, &sig)); - assert!(pk2.verify(msg, &sig)); - } - - #[test] - fn substrate_sk_to_litep2p() { - let sk = SecretKey::generate(); - let sk1: litep2p_dilithium::SecretKey = sk.clone().into(); - - let kp: Keypair = sk.into(); - let kp1: litep2p_dilithium::Keypair = sk1.into(); - - let msg = "hello world".as_bytes(); - let sig = kp.sign(msg); - - // Verify with both keypairs' public keys - assert!(kp.public().verify(msg, &sig)); - assert!(kp1.public().verify(msg, &sig)); - } - - #[test] - fn litep2p_sk_to_substrate_sk() { - let sk = litep2p_dilithium::SecretKey::generate(); - let sk1: SecretKey = sk.clone().into(); - let sk2 = SecretKey::try_from_bytes(&mut sk.to_bytes()).unwrap(); - - let kp: litep2p_dilithium::Keypair = sk.into(); - let kp1: Keypair = sk1.into(); - let kp2: Keypair = sk2.into(); - - let msg = "hello world".as_bytes(); - let sig = kp.sign(msg); - - assert!(kp1.public().verify(msg, &sig)); - assert!(kp2.public().verify(msg, &sig)); - } -} diff --git a/client/network-types/src/lib.rs b/client/network-types/src/lib.rs index 68b79ee0..017052f9 100644 --- a/client/network-types/src/lib.rs +++ b/client/network-types/src/lib.rs @@ -19,7 +19,6 @@ //! Substrate network types with post-quantum Dilithium support. -pub mod dilithium; pub mod kad; pub mod multiaddr; pub mod multihash; From 95ba31885fdab5bf2ade55f1d1eecaa00afabe50 Mon Sep 17 00:00:00 2001 From: illuzen Date: Mon, 1 Jun 2026 11:40:49 +0800 Subject: [PATCH 18/26] only accept p2p at the end of a multiaddr --- client/network-types/src/peer_id.rs | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/client/network-types/src/peer_id.rs b/client/network-types/src/peer_id.rs index 26a64bc0..95c0db14 100644 --- a/client/network-types/src/peer_id.rs +++ b/client/network-types/src/peer_id.rs @@ -65,8 +65,11 @@ impl PeerId { } /// Try to extract `PeerId` from `Multiaddr`. + /// + /// Returns the `PeerId` if the address ends with `/p2p/`, + /// otherwise returns `None`. pub fn try_from_multiaddr(address: &Multiaddr) -> Option { - match address.iter().find(|protocol| std::matches!(protocol, Protocol::P2p(_))) { + match address.iter().last() { Some(Protocol::P2p(multihash)) => Some(Self { multihash }), _ => None, } From c7324d642f3894c86fb5637607863e3108375e9d Mon Sep 17 00:00:00 2001 From: illuzen Date: Mon, 1 Jun 2026 11:45:00 +0800 Subject: [PATCH 19/26] don't derive keys from timestamps... --- client/cli/src/commands/generate_node_key.rs | 24 ++++---------------- client/cli/src/params/node_key_params.rs | 19 +++++++--------- 2 files changed, 13 insertions(+), 30 deletions(-) diff --git a/client/cli/src/commands/generate_node_key.rs b/client/cli/src/commands/generate_node_key.rs index 2e30c5e0..7fa63e2e 100644 --- a/client/cli/src/commands/generate_node_key.rs +++ b/client/cli/src/commands/generate_node_key.rs @@ -22,13 +22,12 @@ use crate::{build_network_key_dir_or_default, Error, NODE_KEY_DILITHIUM_FILE}; use clap::{Args, Parser}; use litep2p::crypto::{dilithium::PublicKey as DilithiumPublicKey, PublicKey}; use qp_rusty_crystals_dilithium::{ml_dsa_87::Keypair, SensitiveBytes32}; +use rand::RngCore; use sc_service::BasePath; -use sp_core::blake2_256; use std::{ fs, io::{self, Write}, path::PathBuf, - time::{SystemTime, UNIX_EPOCH}, }; /// Common arguments accross all generate key commands, subkey and node. @@ -92,22 +91,7 @@ impl GenerateNodeKeyCmd { } } -// Function to get current timestamp, hash it, and return hex string -fn hash_current_time_to_hex() -> [u8; 32] { - // Get current timestamp (milliseconds since Unix epoch) - let timestamp = SystemTime::now() - .duration_since(UNIX_EPOCH) - .expect("Time went backwards") - .as_millis() as u64; - - // Convert timestamp to bytes and hash with BLAKE2-256 - blake2_256(×tamp.to_le_bytes()) -} - // Utility function for generating a key based on the provided CLI arguments -// -// `file` - Name of file to save secret key to -// `bin` fn generate_key( file: &Option, bin: bool, @@ -116,8 +100,10 @@ fn generate_key( default_base_path: bool, executable_name: Option<&String>, ) -> Result<(), Error> { - let mut hashed_timestamp = hash_current_time_to_hex(); - let entropy = SensitiveBytes32::from(&mut hashed_timestamp); + // Generate keypair from cryptographically secure random seed + let mut seed = [0u8; 32]; + rand::rngs::OsRng.fill_bytes(&mut seed); + let entropy = SensitiveBytes32::from(&mut seed); let keypair = Keypair::generate(entropy); let file_data = if bin { diff --git a/client/cli/src/params/node_key_params.rs b/client/cli/src/params/node_key_params.rs index 9a2dd3f0..2bcdf1ba 100644 --- a/client/cli/src/params/node_key_params.rs +++ b/client/cli/src/params/node_key_params.rs @@ -146,7 +146,7 @@ mod tests { use super::*; use clap::ValueEnum; use core::str::FromStr; - use libp2p_identity::Keypair; + use litep2p::crypto::dilithium::Keypair; use std::fs::{self, File}; use tempfile::TempDir; @@ -156,8 +156,7 @@ mod tests { NodeKeyType::value_variants().iter().try_for_each(|t| { let node_key_type = *t; let sk = match node_key_type { - NodeKeyType::Dilithium => - Keypair::generate_dilithium().secret().unwrap().to_vec(), + NodeKeyType::Dilithium => Keypair::generate().secret().to_bytes().to_vec(), }; let hex_sk = hex::encode(sk.clone()); let params = NodeKeyParams { @@ -185,7 +184,7 @@ mod tests { #[test] fn test_node_key_config_file() { - fn check_key(file: PathBuf, key: &libp2p_identity::Keypair) { + fn check_key(file: PathBuf, key: &Keypair) { let params = NodeKeyParams { node_key_type: NodeKeyType::Dilithium, node_key: None, @@ -196,22 +195,20 @@ mod tests { let node_key = params .node_key(&PathBuf::from("not-used"), Role::Authority, false) .expect("Creates node key config") - .into_keypair() + .into_litep2p_keypair() .expect("Creates node key pair"); - if node_key.secret().unwrap() != key.secret().unwrap() { - panic!("Invalid key") - } + assert_eq!(node_key.secret().to_bytes(), key.secret().to_bytes()); } let tmp = tempfile::Builder::new().prefix("alice").tempdir().expect("Creates tempfile"); let file = tmp.path().join("mysecret").to_path_buf(); - let key = Keypair::generate_dilithium(); + let key = Keypair::generate(); - fs::write(&file, &key.dilithium_to_bytes()).expect("Writes secret key"); + fs::write(&file, hex::encode(key.to_bytes())).expect("Writes secret key"); check_key(file.clone(), &key); - fs::write(&file, &key.dilithium_to_bytes()).expect("Writes secret key"); + fs::write(&file, hex::encode(key.to_bytes())).expect("Writes secret key"); check_key(file.clone(), &key); } From 67a15c1deb22323628c746bd7e2ea47ad82ceca7 Mon Sep 17 00:00:00 2001 From: illuzen Date: Mon, 1 Jun 2026 12:04:44 +0800 Subject: [PATCH 20/26] remove QUIC and WebRTC support --- Cargo.lock | 255 +-- Cargo.toml | 6 - client/litep2p/Cargo.toml | 22 +- client/litep2p/src/crypto/mod.rs | 2 - client/litep2p/src/crypto/tls/certificate.rs | 482 ------ client/litep2p/src/crypto/tls/mod.rs | 83 - .../src/crypto/tls/test_assets/ed25519.der | Bin 324 -> 0 bytes .../src/crypto/tls/test_assets/ed448.der | Bin 400 -> 0 bytes .../litep2p/src/crypto/tls/test_assets/gen.sh | 63 - .../tls/test_assets/nistp256_sha256.der | Bin 388 -> 0 bytes .../tls/test_assets/nistp384_sha256.der | Bin 450 -> 0 bytes .../tls/test_assets/nistp384_sha384.der | Bin 450 -> 0 bytes .../tls/test_assets/nistp521_sha512.der | Bin 525 -> 0 bytes .../src/crypto/tls/test_assets/openssl.cfg | 6 - .../crypto/tls/test_assets/pkcs1_sha256.der | Bin 324 -> 0 bytes .../tls/test_assets/rsa_pkcs1_sha256.der | Bin 785 -> 0 bytes .../tls/test_assets/rsa_pkcs1_sha384.der | Bin 785 -> 0 bytes .../tls/test_assets/rsa_pkcs1_sha512.der | Bin 785 -> 0 bytes .../crypto/tls/test_assets/rsa_pss_sha384.der | Bin 878 -> 0 bytes client/litep2p/src/crypto/tls/tests/smoke.rs | 73 - client/litep2p/src/crypto/tls/verifier.rs | 240 --- client/litep2p/src/transport/mod.rs | 4 - client/litep2p/src/transport/quic/config.rs | 58 - .../litep2p/src/transport/quic/connection.rs | 409 ----- client/litep2p/src/transport/quic/listener.rs | 429 ------ client/litep2p/src/transport/quic/mod.rs | 680 -------- .../litep2p/src/transport/quic/substream.rs | 169 -- .../litep2p/src/transport/s2n-quic/config.rs | 30 - .../src/transport/s2n-quic/connection.rs | 743 --------- client/litep2p/src/transport/s2n-quic/mod.rs | 593 ------- client/litep2p/src/transport/webrtc/config.rs | 46 - .../src/transport/webrtc/connection.rs | 823 ---------- client/litep2p/src/transport/webrtc/mod.rs | 801 ---------- .../litep2p/src/transport/webrtc/opening.rs | 500 ------ .../litep2p/src/transport/webrtc/substream.rs | 1362 ----------------- client/litep2p/src/transport/webrtc/util.rs | 142 -- client/network/Cargo.toml | 2 +- client/network/src/litep2p/mod.rs | 1 - 38 files changed, 9 insertions(+), 8015 deletions(-) delete mode 100644 client/litep2p/src/crypto/tls/certificate.rs delete mode 100644 client/litep2p/src/crypto/tls/mod.rs delete mode 100644 client/litep2p/src/crypto/tls/test_assets/ed25519.der delete mode 100644 client/litep2p/src/crypto/tls/test_assets/ed448.der delete mode 100644 client/litep2p/src/crypto/tls/test_assets/gen.sh delete mode 100644 client/litep2p/src/crypto/tls/test_assets/nistp256_sha256.der delete mode 100644 client/litep2p/src/crypto/tls/test_assets/nistp384_sha256.der delete mode 100644 client/litep2p/src/crypto/tls/test_assets/nistp384_sha384.der delete mode 100644 client/litep2p/src/crypto/tls/test_assets/nistp521_sha512.der delete mode 100644 client/litep2p/src/crypto/tls/test_assets/openssl.cfg delete mode 100644 client/litep2p/src/crypto/tls/test_assets/pkcs1_sha256.der delete mode 100644 client/litep2p/src/crypto/tls/test_assets/rsa_pkcs1_sha256.der delete mode 100644 client/litep2p/src/crypto/tls/test_assets/rsa_pkcs1_sha384.der delete mode 100644 client/litep2p/src/crypto/tls/test_assets/rsa_pkcs1_sha512.der delete mode 100644 client/litep2p/src/crypto/tls/test_assets/rsa_pss_sha384.der delete mode 100644 client/litep2p/src/crypto/tls/tests/smoke.rs delete mode 100644 client/litep2p/src/crypto/tls/verifier.rs delete mode 100644 client/litep2p/src/transport/quic/config.rs delete mode 100644 client/litep2p/src/transport/quic/connection.rs delete mode 100644 client/litep2p/src/transport/quic/listener.rs delete mode 100644 client/litep2p/src/transport/quic/mod.rs delete mode 100644 client/litep2p/src/transport/quic/substream.rs delete mode 100644 client/litep2p/src/transport/s2n-quic/config.rs delete mode 100644 client/litep2p/src/transport/s2n-quic/connection.rs delete mode 100644 client/litep2p/src/transport/s2n-quic/mod.rs delete mode 100644 client/litep2p/src/transport/webrtc/config.rs delete mode 100644 client/litep2p/src/transport/webrtc/connection.rs delete mode 100644 client/litep2p/src/transport/webrtc/mod.rs delete mode 100644 client/litep2p/src/transport/webrtc/opening.rs delete mode 100644 client/litep2p/src/transport/webrtc/substream.rs delete mode 100644 client/litep2p/src/transport/webrtc/util.rs diff --git a/Cargo.lock b/Cargo.lock index 79839ac3..d83a3a36 100644 --- a/Cargo.lock +++ b/Cargo.lock @@ -797,29 +797,6 @@ version = "1.5.0" source = "registry+https://github.com/rust-lang/crates.io-index" checksum = "c08606f8c3cbf4ce6ec8e28fb0014a2c086708fe954eaa885384a6165172e7e8" -[[package]] -name = "aws-lc-rs" -version = "1.17.0" -source = "registry+https://github.com/rust-lang/crates.io-index" -checksum = "5ec2f1fc3ec205783a5da9a7e6c1509cc69dedf09a1949e412c1e18469326d00" -dependencies = [ - "aws-lc-sys", - "untrusted 0.7.1", - "zeroize", -] - -[[package]] -name = "aws-lc-sys" -version = "0.41.0" -source = "registry+https://github.com/rust-lang/crates.io-index" -checksum = "1a2f9779ce85b93ab6170dd940ad0169b5766ff848247aff13bb788b832fe3f4" -dependencies = [ - "cc", - "cmake", - "dunce", - "fs_extra", -] - [[package]] name = "backtrace" version = "0.3.75" @@ -936,7 +913,7 @@ version = "0.8.0" source = "registry+https://github.com/rust-lang/crates.io-index" checksum = "08807e080ed7f9d5433fa9b275196cfc35414f66a0c79d864dc51a0d825231a3" dependencies = [ - "bit-vec 0.8.0", + "bit-vec", ] [[package]] @@ -945,15 +922,6 @@ version = "0.8.0" source = "registry+https://github.com/rust-lang/crates.io-index" checksum = "5e764a1d40d510daf35e07be9eb06e75770908c27d411ee6c92109c9840eaaf7" -[[package]] -name = "bit-vec" -version = "0.9.1" -source = "registry+https://github.com/rust-lang/crates.io-index" -checksum = "b71798fca2c1fe1086445a7258a4bc81e6e49dcd24c8d0dd9a1e57395b603f51" -dependencies = [ - "serde", -] - [[package]] name = "bitcoin-internals" version = "0.2.0" @@ -1503,15 +1471,6 @@ dependencies = [ "zeroize", ] -[[package]] -name = "cmake" -version = "0.1.58" -source = "registry+https://github.com/rust-lang/crates.io-index" -checksum = "c0f78a02292a74a88ac736019ab962ece0bc380e3f977bf72e376c5d78ff0678" -dependencies = [ - "cc", -] - [[package]] name = "coarsetime" version = "0.1.36" @@ -1881,21 +1840,6 @@ version = "0.122.0" source = "registry+https://github.com/rust-lang/crates.io-index" checksum = "b530783809a55cb68d070e0de60cfbb3db0dc94c8850dd5725411422bedcf6bb" -[[package]] -name = "crc" -version = "3.4.0" -source = "registry+https://github.com/rust-lang/crates.io-index" -checksum = "5eb8a2a1cd12ab0d987a5d5e825195d372001a4094a0376319d5a0ad71c1ba0d" -dependencies = [ - "crc-catalog", -] - -[[package]] -name = "crc-catalog" -version = "2.5.0" -source = "registry+https://github.com/rust-lang/crates.io-index" -checksum = "217698eaf96b4a3f0bc4f3662aaa55bdf913cd54d7204591faa790070c6d0853" - [[package]] name = "crc32fast" version = "1.5.0" @@ -3093,21 +3037,6 @@ version = "0.2.0" source = "registry+https://github.com/rust-lang/crates.io-index" checksum = "77ce24cb58228fbb8aa041425bb1050850ac19177686ea6e0f41a70416f56fdb" -[[package]] -name = "foreign-types" -version = "0.3.2" -source = "registry+https://github.com/rust-lang/crates.io-index" -checksum = "f6f339eb8adc052cd2ca78910fda869aefa38d22d5cb648e6485e4d3fc06f3b1" -dependencies = [ - "foreign-types-shared", -] - -[[package]] -name = "foreign-types-shared" -version = "0.1.1" -source = "registry+https://github.com/rust-lang/crates.io-index" -checksum = "00b0228411908ca8685dba7fc2cdd70ec9990a6e753e89b6ac91a84c40fbaf4b" - [[package]] name = "fork-tree" version = "13.0.1" @@ -3471,12 +3400,6 @@ dependencies = [ "winapi", ] -[[package]] -name = "fs_extra" -version = "1.3.0" -source = "registry+https://github.com/rust-lang/crates.io-index" -checksum = "42703706b716c37f96a77aea830392ad231f44c9e9a67872fa5548707e11b11c" - [[package]] name = "funty" version = "2.0.0" @@ -5237,13 +5160,13 @@ dependencies = [ "futures-rustls", "libp2p-core", "libp2p-identity", - "rcgen 0.11.3", + "rcgen", "ring 0.17.14", "rustls 0.23.32", "rustls-webpki 0.101.7", "thiserror 1.0.69", "x509-parser 0.16.0", - "yasna 0.5.2", + "yasna", ] [[package]] @@ -5451,12 +5374,7 @@ dependencies = [ "prost-build 0.14.3", "qp-rusty-crystals-dilithium", "quickcheck", - "quinn 0.11.9", "rand 0.8.5", - "rcgen 0.14.8", - "ring 0.17.14", - "rustls 0.23.32", - "rustls-post-quantum", "serde", "serde_json", "serde_millis", @@ -5464,7 +5382,6 @@ dependencies = [ "simple-dns", "smallvec", "socket2 0.5.10", - "str0m", "thiserror 2.0.18", "tokio 1.47.1", "tokio-stream", @@ -5475,10 +5392,9 @@ dependencies = [ "uint 0.10.0", "unsigned-varint 0.8.0", "url", - "webpki", "x509-parser 0.17.0", "yamux", - "yasna 0.5.2", + "yasna", "zeroize", ] @@ -6286,59 +6202,12 @@ version = "0.3.1" source = "registry+https://github.com/rust-lang/crates.io-index" checksum = "c08d65885ee38876c4f86fa503fb49d7b507c2b62552df7c70b2fce627e06381" -[[package]] -name = "openssl" -version = "0.10.80" -source = "registry+https://github.com/rust-lang/crates.io-index" -checksum = "a45fa2aa886c42762255da344f0a0d313e254066c46aad76f300c3d3da62d967" -dependencies = [ - "bitflags 2.9.4", - "cfg-if", - "foreign-types", - "libc", - "openssl-macros", - "openssl-sys", -] - -[[package]] -name = "openssl-macros" -version = "0.1.1" -source = "registry+https://github.com/rust-lang/crates.io-index" -checksum = "a948666b637a0f465e8564c73e89d4dde00d72d4d473cc972f390fc3dcee7d9c" -dependencies = [ - "proc-macro2", - "quote", - "syn 2.0.106", -] - [[package]] name = "openssl-probe" version = "0.1.6" source = "registry+https://github.com/rust-lang/crates.io-index" checksum = "d05e27ee213611ffe7d6348b942e8f942b37114c00cc03cec254295a4a17852e" -[[package]] -name = "openssl-src" -version = "300.6.0+3.6.2" -source = "registry+https://github.com/rust-lang/crates.io-index" -checksum = "a8e8cbfd3a4a8c8f089147fd7aaa33cf8c7450c4d09f8f80698a0cf093abeff4" -dependencies = [ - "cc", -] - -[[package]] -name = "openssl-sys" -version = "0.9.116" -source = "registry+https://github.com/rust-lang/crates.io-index" -checksum = "f28a22dc7140cda5f096e5e7724a6962ca81a7f8bfd2979f9b18c11af56318c4" -dependencies = [ - "cc", - "libc", - "openssl-src", - "pkg-config", - "vcpkg", -] - [[package]] name = "option-ext" version = "0.2.0" @@ -7874,7 +7743,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index" checksum = "2bb0be07becd10686a0bb407298fb425360a5c44a663774406340c59a22de4ce" dependencies = [ "bit-set", - "bit-vec 0.8.0", + "bit-vec", "bitflags 2.9.4", "lazy_static", "num-traits", @@ -8433,7 +8302,7 @@ dependencies = [ "quantus-runtime", "quinn 0.10.2", "rand 0.8.5", - "rcgen 0.11.3", + "rcgen", "rustls 0.21.12", "sc-basic-authorship", "sc-cli", @@ -8618,7 +8487,6 @@ version = "0.11.13" source = "registry+https://github.com/rust-lang/crates.io-index" checksum = "f1906b49b0c3bc04b5fe5d86a77925ae6524a19b816ae38ce1e426255f1d8a31" dependencies = [ - "aws-lc-rs", "bytes 1.11.1", "getrandom 0.3.3", "lru-slab", @@ -8835,20 +8703,7 @@ dependencies = [ "pem", "ring 0.16.20", "time", - "yasna 0.5.2", -] - -[[package]] -name = "rcgen" -version = "0.14.8" -source = "registry+https://github.com/rust-lang/crates.io-index" -checksum = "57f6d249aad744e274e682777a50283a225a32705394ee6d5fcc01efa25e4055" -dependencies = [ - "aws-lc-rs", - "rustls-pki-types", - "time", - "x509-parser 0.18.1", - "yasna 0.6.0", + "yasna", ] [[package]] @@ -9146,7 +9001,6 @@ version = "0.23.32" source = "registry+https://github.com/rust-lang/crates.io-index" checksum = "cd3c25631629d034ce7cd9940adc9d45762d46de2b0f57193c4443b92c6d4d40" dependencies = [ - "aws-lc-rs", "log", "once_cell", "ring 0.17.14", @@ -9226,17 +9080,6 @@ version = "0.1.1" source = "registry+https://github.com/rust-lang/crates.io-index" checksum = "f87165f0995f63a9fbeea62b64d10b4d9d8e78ec6d7d51fb2125fda7bb36788f" -[[package]] -name = "rustls-post-quantum" -version = "0.2.4" -source = "registry+https://github.com/rust-lang/crates.io-index" -checksum = "0da3cd9229bac4fae1f589c8f875b3c891a058ddaa26eb3bde16b5e43dc174ce" -dependencies = [ - "aws-lc-rs", - "rustls 0.23.32", - "rustls-webpki 0.103.6", -] - [[package]] name = "rustls-webpki" version = "0.101.7" @@ -9253,7 +9096,6 @@ version = "0.103.6" source = "registry+https://github.com/rust-lang/crates.io-index" checksum = "8572f3c2cb9934231157b45499fc41e1f58c589fdfb81a844ba873265e80f8eb" dependencies = [ - "aws-lc-rs", "ring 0.17.14", "rustls-pki-types", "untrusted 0.9.0", @@ -10571,21 +10413,6 @@ dependencies = [ "untrusted 0.9.0", ] -[[package]] -name = "sctp-proto" -version = "0.5.0" -source = "registry+https://github.com/rust-lang/crates.io-index" -checksum = "423139d8cca3021b9d800f084a711ba2d23b508ae71b33dba167f11ca33e54c7" -dependencies = [ - "bytes 1.11.1", - "crc", - "log", - "rand 0.9.2", - "rustc-hash 2.1.1", - "slab", - "thiserror 2.0.18", -] - [[package]] name = "sec1" version = "0.7.3" @@ -10854,16 +10681,6 @@ dependencies = [ "cfg-if", "cpufeatures", "digest 0.10.7", - "sha1-asm", -] - -[[package]] -name = "sha1-asm" -version = "0.5.3" -source = "registry+https://github.com/rust-lang/crates.io-index" -checksum = "286acebaf8b67c1130aedffad26f594eff0c1292389158135327d2e23aed582b" -dependencies = [ - "cc", ] [[package]] @@ -11995,26 +11812,6 @@ dependencies = [ "syn 1.0.109", ] -[[package]] -name = "str0m" -version = "0.11.1" -source = "registry+https://github.com/rust-lang/crates.io-index" -checksum = "26890ff5b60e33eb8bedcf44792fc459c8f348ecbf2658edb19477571e547ac2" -dependencies = [ - "combine", - "crc", - "fastrand", - "hmac 0.12.1", - "libc", - "once_cell", - "openssl", - "openssl-sys", - "sctp-proto", - "serde", - "sha1", - "tracing", -] - [[package]] name = "strength_reduce" version = "0.2.4" @@ -13947,16 +13744,6 @@ dependencies = [ "wasm-bindgen", ] -[[package]] -name = "webpki" -version = "0.22.4" -source = "registry+https://github.com/rust-lang/crates.io-index" -checksum = "ed63aea5ce73d0ff405984102c42de94fc55a6b75765d621c65262469b3c9b53" -dependencies = [ - "ring 0.17.14", - "untrusted 0.9.0", -] - [[package]] name = "webpki-root-certs" version = "0.26.11" @@ -14715,24 +14502,6 @@ dependencies = [ "time", ] -[[package]] -name = "x509-parser" -version = "0.18.1" -source = "registry+https://github.com/rust-lang/crates.io-index" -checksum = "d43b0f71ce057da06bc0851b23ee24f3f86190b07203dd8f567d0b706a185202" -dependencies = [ - "asn1-rs 0.7.1", - "aws-lc-rs", - "data-encoding", - "der-parser 10.0.0", - "lazy_static", - "nom 7.1.3", - "oid-registry 0.8.1", - "rusticata-macros", - "thiserror 2.0.18", - "time", -] - [[package]] name = "xcm-procedural" version = "11.0.2" @@ -14791,16 +14560,6 @@ dependencies = [ "time", ] -[[package]] -name = "yasna" -version = "0.6.0" -source = "registry+https://github.com/rust-lang/crates.io-index" -checksum = "b5f6765e852b9b4dc8e2a76843e4d64d1cea8e79bcde0b6901aea8e7c7f08282" -dependencies = [ - "bit-vec 0.9.1", - "time", -] - [[package]] name = "yoke" version = "0.8.0" diff --git a/Cargo.toml b/Cargo.toml index f8308438..918015c7 100644 --- a/Cargo.toml +++ b/Cargo.toml @@ -131,7 +131,6 @@ unsigned-varint = { version = "0.7.2" } uuid = { version = "1.7.0", features = ["serde", "v4"] } void = { version = "1.0.2" } wasm-timer = { version = "0.2.5" } -webpki = { version = "0.22.4" } x509-parser = { version = "0.17.0" } yamux = { version = "0.13.9" } yasna = { version = "0.5.0" } @@ -197,11 +196,6 @@ pallet-transaction-payment-rpc-runtime-api = { version = "45.0.0", default-featu pallet-treasury = { path = "pallets/treasury", default-features = false } pallet-utility = { version = "45.0.0", default-features = false } prometheus-endpoint = { version = "0.17.7", default-features = false, package = "substrate-prometheus-endpoint" } -quinn = { version = "0.11.9", default-features = false } -rcgen = { version = "0.14.5", default-features = false } -ring = { version = "0.17.14" } -rustls = { version = "0.23.32", default-features = false } -rustls-post-quantum = { version = "0.2.4" } sc-basic-authorship = { version = "0.53.0", default-features = false } sc-block-builder = { version = "0.48.0", default-features = true } sc-cli = { version = "0.57.0", default-features = false } diff --git a/client/litep2p/Cargo.toml b/client/litep2p/Cargo.toml index 561def30..1489d826 100644 --- a/client/litep2p/Cargo.toml +++ b/client/litep2p/Cargo.toml @@ -56,17 +56,6 @@ qp-rusty-crystals-dilithium = { workspace = true } # Websocket tokio-tungstenite = { version = "0.27.0", features = ["rustls-tls-native-roots", "url"], optional = true } -# QUIC with post-quantum TLS -quinn = { workspace = true, features = ["runtime-tokio", "rustls-aws-lc-rs"], optional = true } -rcgen = { workspace = true, features = ["aws_lc_rs"], optional = true } -ring = { workspace = true, optional = true } -rustls = { workspace = true, features = ["aws-lc-rs", "std"], optional = true } -rustls-post-quantum = { workspace = true, optional = true } -webpki = { workspace = true, optional = true } - -# WebRTC -str0m = { version = "0.11.1", optional = true } - # Fuzzing serde_millis = { version = "0.1", optional = true } @@ -78,7 +67,7 @@ serde_json = { workspace = true, features = ["std"] } tracing-subscriber = { version = "0.3.20", features = ["env-filter"] } [features] -default = ["quic", "websocket"] +default = ["websocket"] fuzz = [ "bytes/serde", "cid/serde", @@ -87,15 +76,6 @@ fuzz = [ "serde/derive", "serde/rc", ] -quic = [ - "dep:quinn", - "dep:rcgen", - "dep:ring", - "dep:rustls", - "dep:rustls-post-quantum", - "dep:webpki", -] -webrtc = ["dep:str0m"] websocket = ["dep:tokio-tungstenite"] # Compatibility feature - RSA support removed in favor of post-quantum Dilithium rsa = [] diff --git a/client/litep2p/src/crypto/mod.rs b/client/litep2p/src/crypto/mod.rs index ed034444..57468523 100644 --- a/client/litep2p/src/crypto/mod.rs +++ b/client/litep2p/src/crypto/mod.rs @@ -29,8 +29,6 @@ use crate::{error::ParseError, peer_id::*}; pub mod dilithium; pub(crate) mod noise; -#[cfg(feature = "quic")] -pub(crate) mod tls; pub(crate) mod keys_proto { include!(concat!(env!("OUT_DIR"), "/keys_proto.rs")); } diff --git a/client/litep2p/src/crypto/tls/certificate.rs b/client/litep2p/src/crypto/tls/certificate.rs deleted file mode 100644 index 48b8e52f..00000000 --- a/client/litep2p/src/crypto/tls/certificate.rs +++ /dev/null @@ -1,482 +0,0 @@ -// Copyright 2021 Parity Technologies (UK) Ltd. -// -// Permission is hereby granted, free of charge, to any person obtaining a -// copy of this software and associated documentation files (the "Software"), -// to deal in the Software without restriction, including without limitation -// the rights to use, copy, modify, merge, publish, distribute, sublicense, -// and/or sell copies of the Software, and to permit persons to whom the -// Software is furnished to do so, subject to the following conditions: -// -// The above copyright notice and this permission notice shall be included in -// all copies or substantial portions of the Software. -// -// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS -// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, -// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE -// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER -// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING -// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER -// DEALINGS IN THE SOFTWARE. - -//! X.509 certificate handling for libp2p -//! -//! This module handles generation, signing, and verification of certificates. - -use crate::{ - crypto::{dilithium::Keypair, PublicKey, RemotePublicKey}, - PeerId, -}; - -use rustls::pki_types::{CertificateDer, PrivatePkcs8KeyDer}; -use x509_parser::{prelude::*, signature_algorithm::SignatureAlgorithm}; - -/// The libp2p Public Key Extension is a X.509 extension -/// with the Object Identier 1.3.6.1.4.1.53594.1.1, -/// allocated by IANA to the libp2p project at Protocol Labs. -const P2P_EXT_OID: [u64; 9] = [1, 3, 6, 1, 4, 1, 53594, 1, 1]; - -/// The peer signs the concatenation of the string `libp2p-tls-handshake:` -/// and the public key that it used to generate the certificate carrying -/// the libp2p Public Key Extension, using its private host key. -/// This signature provides cryptographic proof that the peer was -/// in possession of the private host key at the time the certificate was signed. -const P2P_SIGNING_PREFIX: [u8; 21] = *b"libp2p-tls-handshake:"; - -// Certificates MUST use the NamedCurve encoding for elliptic curve parameters. -// Similarly, hash functions with an output length less than 256 bits MUST NOT be used. -static P2P_SIGNATURE_ALGORITHM: &rcgen::SignatureAlgorithm = &rcgen::PKCS_ECDSA_P256_SHA256; - -/// Generates a self-signed TLS certificate that includes a libp2p-specific -/// certificate extension containing the public key of the given keypair. -pub fn generate( - identity_keypair: &Keypair, -) -> Result<(CertificateDer<'static>, PrivatePkcs8KeyDer<'static>), GenError> { - // Keypair used to sign the certificate. - // SHOULD NOT be related to the host's key. - // Endpoints MAY generate a new key and certificate - // for every connection attempt, or they MAY reuse the same key - // and certificate for multiple connections. - let certificate_keypair = rcgen::KeyPair::generate_for(P2P_SIGNATURE_ALGORITHM)?; - let rustls_key = PrivatePkcs8KeyDer::from(certificate_keypair.serialize_der()); - - let certificate = { - let mut params = rcgen::CertificateParams::new(vec![])?; - params.distinguished_name = rcgen::DistinguishedName::new(); - params - .custom_extensions - .push(make_libp2p_extension(identity_keypair, &certificate_keypair)?); - params.self_signed(&certificate_keypair)? - }; - - let rustls_certificate = CertificateDer::from(certificate.der().to_vec()); - - Ok((rustls_certificate, rustls_key)) -} - -/// Attempts to parse the provided bytes as a [`P2pCertificate`]. -/// -/// For this to succeed, the certificate must contain the specified extension and the signature must -/// match the embedded public key. -pub fn parse<'a>(certificate: &'a CertificateDer<'a>) -> Result, ParseError> { - let certificate = parse_unverified(certificate.as_ref())?; - - certificate.verify()?; - - Ok(certificate) -} - -/// An X.509 certificate with a libp2p-specific extension -/// is used to secure libp2p connections. -pub struct P2pCertificate<'a> { - certificate: X509Certificate<'a>, - /// This is a specific libp2p Public Key Extension with two values: - /// * the public host key - /// * a signature performed using the private host key - extension: P2pExtension, -} - -/// The contents of the specific libp2p extension, containing the public host key -/// and a signature performed using the private host key. -pub struct P2pExtension { - public_key: RemotePublicKey, - /// This signature provides cryptographic proof that the peer was - /// in possession of the private host key at the time the certificate was signed. - signature: Vec, - /// PeerId derived from the public key. While not being part of the extension, we store it to - /// avoid the need to serialize the public key back to protobuf. - peer_id: PeerId, -} - -#[derive(Debug, thiserror::Error)] -#[error(transparent)] -pub struct GenError(#[from] rcgen::Error); - -#[derive(Debug)] -pub struct ParseError(pub(crate) webpki::Error); - -impl std::fmt::Display for ParseError { - fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result { - write!(f, "certificate parse error: {:?}", self.0) - } -} - -impl std::error::Error for ParseError {} - -impl From for ParseError { - fn from(e: webpki::Error) -> Self { - ParseError(e) - } -} - -#[derive(Debug)] -pub struct VerificationError(pub(crate) webpki::Error); - -impl std::fmt::Display for VerificationError { - fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result { - write!(f, "certificate verification error: {:?}", self.0) - } -} - -impl std::error::Error for VerificationError {} - -impl From for VerificationError { - fn from(e: webpki::Error) -> Self { - VerificationError(e) - } -} - -/// Internal function that only parses but does not verify the certificate. -/// -/// Useful for testing but unsuitable for production. -fn parse_unverified<'a>(der_input: &'a [u8]) -> Result, webpki::Error> { - let x509 = X509Certificate::from_der(der_input) - .map(|(_rest_input, x509)| x509) - .map_err(|_| webpki::Error::BadDer)?; - - let p2p_ext_oid = der_parser::oid::Oid::from(&P2P_EXT_OID) - .expect("This is a valid OID of p2p extension; qed"); - - let mut libp2p_extension = None; - - for ext in x509.extensions() { - let oid = &ext.oid; - if oid == &p2p_ext_oid && libp2p_extension.is_some() { - // The extension was already parsed - return Err(webpki::Error::BadDer); - } - - if oid == &p2p_ext_oid { - // The public host key and the signature are ANS.1-encoded - // into the SignedKey data structure, which is carried - // in the libp2p Public Key Extension. - // SignedKey ::= SEQUENCE { - // publicKey OCTET STRING, - // signature OCTET STRING - // } - let (public_key_protobuf, signature): (Vec, Vec) = - yasna::decode_der(ext.value).map_err(|_| webpki::Error::ExtensionValueInvalid)?; - // The publicKey field of SignedKey contains the public host key - // of the endpoint, encoded using the following protobuf: - // enum KeyType { - // RSA = 0; - // Ed25519 = 1; - // Secp256k1 = 2; - // ECDSA = 3; - // } - // message PublicKey { - // required KeyType Type = 1; - // required bytes Data = 2; - // } - let public_key = RemotePublicKey::from_protobuf_encoding(&public_key_protobuf) - .map_err(|_| webpki::Error::UnknownIssuer)?; - let peer_id = PeerId::from_public_key_protobuf(&public_key_protobuf); - let ext = P2pExtension { public_key, signature, peer_id }; - libp2p_extension = Some(ext); - continue; - } - - if ext.critical { - // Endpoints MUST abort the connection attempt if the certificate - // contains critical extensions that the endpoint does not understand. - return Err(webpki::Error::UnsupportedCriticalExtension); - } - - // Implementations MUST ignore non-critical extensions with unknown OIDs. - } - - // The certificate MUST contain the libp2p Public Key Extension. - // If this extension is missing, endpoints MUST abort the connection attempt. - let extension = libp2p_extension.ok_or(webpki::Error::BadDer)?; - - let certificate = P2pCertificate { certificate: x509, extension }; - - Ok(certificate) -} - -fn make_libp2p_extension( - identity_keypair: &Keypair, - certificate_pubkey: &impl rcgen::PublicKeyData, -) -> Result { - // The peer signs the concatenation of the string `libp2p-tls-handshake:` - // and the public key (in SPKI DER format) that it used to generate the certificate carrying - // the libp2p Public Key Extension, using its private host key. - let signature = { - let mut msg = vec![]; - msg.extend(P2P_SIGNING_PREFIX); - msg.extend(certificate_pubkey.subject_public_key_info()); - - identity_keypair.sign(&msg) - }; - - // The public host key and the signature are ANS.1-encoded - // into the SignedKey data structure, which is carried - // in the libp2p Public Key Extension. - // SignedKey ::= SEQUENCE { - // publicKey OCTET STRING, - // signature OCTET STRING - // } - let extension_content = { - let serialized_pubkey = PublicKey::from(identity_keypair.public()).to_protobuf_encoding(); - yasna::encode_der(&(serialized_pubkey, signature)) - }; - - // This extension MAY be marked critical according to libp2p spec. - // However, we set it as non-critical to avoid issues with rustls 0.23+ - // which rejects unknown critical extensions during certificate loading. - // Our custom verifier still validates the extension properly. - let mut ext = rcgen::CustomExtension::from_oid_content(&P2P_EXT_OID, extension_content); - ext.set_criticality(false); - - Ok(ext) -} - -impl P2pCertificate<'_> { - /// The [`PeerId`] of the remote peer. - pub fn peer_id(&self) -> PeerId { - self.extension.peer_id - } - - /// Verify the `signature` of the `message` signed by the private key corresponding to the - /// public key stored in the certificate. - pub fn verify_signature( - &self, - signature_scheme: rustls::SignatureScheme, - message: &[u8], - signature: &[u8], - ) -> Result<(), VerificationError> { - let pk = self.public_key(signature_scheme)?; - pk.verify(message, signature) - .map_err(|_| webpki::Error::InvalidSignatureForPublicKey)?; - - Ok(()) - } - - /// Get a [`ring::signature::UnparsedPublicKey`] for this `signature_scheme`. - /// Return `Error` if the `signature_scheme` does not match the public key signature - /// and hashing algorithm or if the `signature_scheme` is not supported. - fn public_key( - &self, - signature_scheme: rustls::SignatureScheme, - ) -> Result, webpki::Error> { - use ring::signature; - use rustls::SignatureScheme::*; - - let current_signature_scheme = self.signature_scheme()?; - if signature_scheme != current_signature_scheme { - // This certificate was signed with a different signature scheme - return Err(webpki::Error::UnsupportedSignatureAlgorithmForPublicKey); - } - - let verification_algorithm: &dyn signature::VerificationAlgorithm = match signature_scheme { - RSA_PKCS1_SHA256 => &signature::RSA_PKCS1_2048_8192_SHA256, - RSA_PKCS1_SHA384 => &signature::RSA_PKCS1_2048_8192_SHA384, - RSA_PKCS1_SHA512 => &signature::RSA_PKCS1_2048_8192_SHA512, - ECDSA_NISTP256_SHA256 => &signature::ECDSA_P256_SHA256_ASN1, - ECDSA_NISTP384_SHA384 => &signature::ECDSA_P384_SHA384_ASN1, - ECDSA_NISTP521_SHA512 => { - // See https://github.com/briansmith/ring/issues/824 - return Err(webpki::Error::UnsupportedSignatureAlgorithm); - }, - RSA_PSS_SHA256 => &signature::RSA_PSS_2048_8192_SHA256, - RSA_PSS_SHA384 => &signature::RSA_PSS_2048_8192_SHA384, - RSA_PSS_SHA512 => &signature::RSA_PSS_2048_8192_SHA512, - ED25519 => &signature::ED25519, - ED448 => { - // See https://github.com/briansmith/ring/issues/463 - return Err(webpki::Error::UnsupportedSignatureAlgorithm); - }, - // Similarly, hash functions with an output length less than 256 bits - // MUST NOT be used, due to the possibility of collision attacks. - // In particular, MD5 and SHA1 MUST NOT be used. - RSA_PKCS1_SHA1 => return Err(webpki::Error::UnsupportedSignatureAlgorithm), - ECDSA_SHA1_Legacy => return Err(webpki::Error::UnsupportedSignatureAlgorithm), - _ => return Err(webpki::Error::UnsupportedSignatureAlgorithm), - }; - let spki = &self.certificate.tbs_certificate.subject_pki; - let key = signature::UnparsedPublicKey::new( - verification_algorithm, - spki.subject_public_key.as_ref(), - ); - - Ok(key) - } - - /// This method validates the certificate according to libp2p TLS 1.3 specs. - /// The certificate MUST: - /// 1. be valid at the time it is received by the peer; - /// 2. use the NamedCurve encoding; - /// 3. use hash functions with an output length not less than 256 bits; - /// 4. be self signed; - /// 5. contain a valid signature in the specific libp2p extension. - fn verify(&self) -> Result<(), webpki::Error> { - use webpki::Error; - // The certificate MUST have NotBefore and NotAfter fields set - // such that the certificate is valid at the time it is received by the peer. - if !self.certificate.validity().is_valid() { - return Err(Error::InvalidCertValidity); - } - - // Certificates MUST use the NamedCurve encoding for elliptic curve parameters. - // Similarly, hash functions with an output length less than 256 bits - // MUST NOT be used, due to the possibility of collision attacks. - // In particular, MD5 and SHA1 MUST NOT be used. - // Endpoints MUST abort the connection attempt if it is not used. - let signature_scheme = self.signature_scheme()?; - // Endpoints MUST abort the connection attempt if the certificate's - // self-signature is not valid. - let raw_certificate = self.certificate.tbs_certificate.as_ref(); - let signature = self.certificate.signature_value.as_ref(); - // check if self signed - self.verify_signature(signature_scheme, raw_certificate, signature) - .map_err(|_| Error::SignatureAlgorithmMismatch)?; - - let subject_pki = self.certificate.public_key().raw; - - // The peer signs the concatenation of the string `libp2p-tls-handshake:` - // and the public key that it used to generate the certificate carrying - // the libp2p Public Key Extension, using its private host key. - let mut msg = vec![]; - msg.extend(P2P_SIGNING_PREFIX); - msg.extend(subject_pki); - - // This signature provides cryptographic proof that the peer was in possession - // of the private host key at the time the certificate was signed. - // Peers MUST verify the signature, and abort the connection attempt - // if signature verification fails. - let user_owns_sk = self.extension.public_key.verify(&msg, &self.extension.signature); - if !user_owns_sk { - return Err(Error::UnknownIssuer); - } - - Ok(()) - } - - /// Return the signature scheme corresponding to [`AlgorithmIdentifier`]s - /// of `subject_pki` and `signature_algorithm` - /// according to . - fn signature_scheme(&self) -> Result { - // Certificates MUST use the NamedCurve encoding for elliptic curve parameters. - // Endpoints MUST abort the connection attempt if it is not used. - use oid_registry::*; - use rustls::SignatureScheme::*; - - let signature_algorithm = &self.certificate.signature_algorithm; - let pki_algorithm = &self.certificate.tbs_certificate.subject_pki.algorithm; - - if pki_algorithm.algorithm == OID_PKCS1_RSAENCRYPTION { - if signature_algorithm.algorithm == OID_PKCS1_SHA256WITHRSA { - return Ok(RSA_PKCS1_SHA256); - } - if signature_algorithm.algorithm == OID_PKCS1_SHA384WITHRSA { - return Ok(RSA_PKCS1_SHA384); - } - if signature_algorithm.algorithm == OID_PKCS1_SHA512WITHRSA { - return Ok(RSA_PKCS1_SHA512); - } - if signature_algorithm.algorithm == OID_PKCS1_RSASSAPSS { - // According to https://datatracker.ietf.org/doc/html/rfc4055#section-3.1: - // Inside of params there shuld be a sequence of: - // - Hash Algorithm - // - Mask Algorithm - // - Salt Length - // - Trailer Field - - // We are interested in Hash Algorithm only - - if let Ok(SignatureAlgorithm::RSASSA_PSS(params)) = - SignatureAlgorithm::try_from(signature_algorithm) - { - let hash_oid = params.hash_algorithm_oid(); - if hash_oid == &OID_NIST_HASH_SHA256 { - return Ok(RSA_PSS_SHA256); - } - if hash_oid == &OID_NIST_HASH_SHA384 { - return Ok(RSA_PSS_SHA384); - } - if hash_oid == &OID_NIST_HASH_SHA512 { - return Ok(RSA_PSS_SHA512); - } - } - - // Default hash algo is SHA-1, however: - // In particular, MD5 and SHA1 MUST NOT be used. - return Err(webpki::Error::UnsupportedSignatureAlgorithm); - } - } - - if pki_algorithm.algorithm == OID_KEY_TYPE_EC_PUBLIC_KEY { - let signature_param = pki_algorithm - .parameters - .as_ref() - .ok_or(webpki::Error::BadDer)? - .as_oid() - .map_err(|_| webpki::Error::BadDer)?; - if signature_param == OID_EC_P256 && - signature_algorithm.algorithm == OID_SIG_ECDSA_WITH_SHA256 - { - return Ok(ECDSA_NISTP256_SHA256); - } - if signature_param == OID_NIST_EC_P384 && - signature_algorithm.algorithm == OID_SIG_ECDSA_WITH_SHA384 - { - return Ok(ECDSA_NISTP384_SHA384); - } - if signature_param == OID_NIST_EC_P521 && - signature_algorithm.algorithm == OID_SIG_ECDSA_WITH_SHA512 - { - return Ok(ECDSA_NISTP521_SHA512); - } - return Err(webpki::Error::UnsupportedSignatureAlgorithm); - } - - if signature_algorithm.algorithm == OID_SIG_ED25519 { - return Ok(ED25519); - } - if signature_algorithm.algorithm == OID_SIG_ED448 { - return Ok(ED448); - } - - Err(webpki::Error::UnsupportedSignatureAlgorithm) - } -} - -#[cfg(test)] -mod tests { - use super::*; - - #[test] - fn sanity_check() { - let keypair = crate::crypto::dilithium::Keypair::generate(); - - let (cert, _) = generate(&keypair).unwrap(); - let parsed_cert = parse(&cert).unwrap(); - - assert!(parsed_cert.verify().is_ok()); - assert_eq!(PublicKey::from(keypair.public()), parsed_cert.extension.public_key); - } - - // Note: The certificate signature scheme tests for classical crypto (Ed25519, RSA, ECDSA) - // have been removed because the test certificates contain Ed25519 identity keys in their - // p2p extensions, but we now only support Dilithium for identity. - // The `sanity_check` test above verifies that Dilithium certificates work correctly. -} diff --git a/client/litep2p/src/crypto/tls/mod.rs b/client/litep2p/src/crypto/tls/mod.rs deleted file mode 100644 index 957db4c4..00000000 --- a/client/litep2p/src/crypto/tls/mod.rs +++ /dev/null @@ -1,83 +0,0 @@ -// Copyright 2021 Parity Technologies (UK) Ltd. -// Copyright 2022 Protocol Labs. -// -// Permission is hereby granted, free of charge, to any person obtaining a -// copy of this software and associated documentation files (the "Software"), -// to deal in the Software without restriction, including without limitation -// the rights to use, copy, modify, merge, publish, distribute, sublicense, -// and/or sell copies of the Software, and to permit persons to whom the -// Software is furnished to do so, subject to the following conditions: -// -// The above copyright notice and this permission notice shall be included in -// all copies or substantial portions of the Software. -// -// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS -// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, -// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE -// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER -// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING -// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER -// DEALINGS IN THE SOFTWARE. - -//! TLS configuration based on libp2p TLS specs. -//! -//! See . -//! -//! This implementation uses post-quantum key exchange via ML-KEM (Kyber) hybrid mode -//! when available, providing quantum-resistant forward secrecy. - -#![cfg_attr(docsrs, feature(doc_cfg, doc_auto_cfg))] - -use crate::{crypto::dilithium::Keypair, PeerId}; - -use rustls::pki_types::PrivateKeyDer; -use std::sync::Arc; - -pub mod certificate; -mod verifier; - -const P2P_ALPN: [u8; 6] = *b"libp2p"; - -/// Create a TLS server configuration for litep2p with post-quantum key exchange. -pub fn make_server_config( - keypair: &Keypair, -) -> Result { - let (certificate, private_key) = certificate::generate(keypair)?; - - // Use post-quantum provider with ML-KEM hybrid key exchange - let provider = rustls_post_quantum::provider(); - - let mut crypto = rustls::ServerConfig::builder_with_provider(Arc::new(provider)) - .with_protocol_versions(verifier::PROTOCOL_VERSIONS) - .expect("Protocol versions are valid; qed") - .with_client_cert_verifier(Arc::new(verifier::Libp2pCertificateVerifier::new())) - .with_single_cert(vec![certificate], PrivateKeyDer::Pkcs8(private_key)) - .expect("Server cert key DER is valid; qed"); - crypto.alpn_protocols = vec![P2P_ALPN.to_vec()]; - - Ok(crypto) -} - -/// Create a TLS client configuration for libp2p with post-quantum key exchange. -pub fn make_client_config( - keypair: &Keypair, - remote_peer_id: Option, -) -> Result { - let (certificate, private_key) = certificate::generate(keypair)?; - - // Use post-quantum provider with ML-KEM hybrid key exchange - let provider = rustls_post_quantum::provider(); - - let mut crypto = rustls::ClientConfig::builder_with_provider(Arc::new(provider)) - .with_protocol_versions(verifier::PROTOCOL_VERSIONS) - .expect("Protocol versions are valid; qed") - .dangerous() - .with_custom_certificate_verifier(Arc::new( - verifier::Libp2pCertificateVerifier::with_remote_peer_id(remote_peer_id), - )) - .with_client_auth_cert(vec![certificate], PrivateKeyDer::Pkcs8(private_key)) - .expect("Client cert key DER is valid; qed"); - crypto.alpn_protocols = vec![P2P_ALPN.to_vec()]; - - Ok(crypto) -} diff --git a/client/litep2p/src/crypto/tls/test_assets/ed25519.der b/client/litep2p/src/crypto/tls/test_assets/ed25519.der deleted file mode 100644 index 494a199561a67047c63aa847ebd5a734d664a974..0000000000000000000000000000000000000000 GIT binary patch literal 0 HcmV?d00001 literal 324 zcmXqLVstQQ{JemfiIIs(gsZ!KuJPrk8h>J!?Gd%_Vy}DSeZYW~jafUjz<|L(PMp`s z(9p=x)WFctz{E5P$Tb2oO`u$$3N5H&W<`by-3L?mpZR?`CQ59!Z)V-Wt`7G%!P(Va z`JM^-Zl^sCEv`4HHK=Ce(q?01VQgL$#RvrdS+Wc=SX4L|g%s|mOgtj`mczUK#Rs0- zUXDkYWBx7udC6Aw|C|-mpZ~qX&*Cs;#k`<1Dt|S%Y?=E^^l+_ObJC0J#}7>VU2{SB z&J?C_tuGxZ4gZd^A3k8ap-S(B*rsiTF6wtQK36_yos(}Zx|Omf`T3iC8RwaGO^j7t(-$c*dCA@9-p7CM LTr=(RtS{UEyA_6f diff --git a/client/litep2p/src/crypto/tls/test_assets/ed448.der b/client/litep2p/src/crypto/tls/test_assets/ed448.der deleted file mode 100644 index c74123868473acbc8b680c478d80aabc7371d6b7..0000000000000000000000000000000000000000 GIT binary patch literal 0 HcmV?d00001 literal 400 zcmXqLV(c+!V&qxC%*4pVB*MQwaM@J6(&HYkoYmTlks*D;u+RYM}vxft)z6 zk)ffHp{aqPp@E5M6p(8KWST&^Ko!nV#mrU=*VyfM-|{N)?>iS8a&+&3Y3u()K5aR+ zIm*WxUn14%uUb0pFKWD}C=YQ|;vp7sy zF)!$h%3sYbTjo9!JzT5Sob=-Q@dML-*IW?3GleN!>q|#U!@r~KhY#3psM0$jwrN|T zi~1dn&y^2a=j2<9?q-Ggp_rlWg<_CUmqNG0l_FrDK;;PW5BCaUp$h2rkL mO`5a*>{jW{X%6E$_KeR(Eb8+q&&WykHGDhu;xlitFaQ9G!K6U| diff --git a/client/litep2p/src/crypto/tls/test_assets/gen.sh b/client/litep2p/src/crypto/tls/test_assets/gen.sh deleted file mode 100644 index 4b771887..00000000 --- a/client/litep2p/src/crypto/tls/test_assets/gen.sh +++ /dev/null @@ -1,63 +0,0 @@ -#ED25519 (works): -openssl genpkey -algorithm ed25519 -out privateKey.key -openssl req -new -subj="/" -key privateKey.key -out req.pem -openssl x509 -req -in req.pem -signkey privateKey.key -out certificate.crt -extensions p2p_ext -extfile ./openssl.cfg -openssl x509 -outform der -in certificate.crt -out ed25519.der - -#ED448 (works): -openssl genpkey -algorithm ed448 -out privateKey.key -openssl req -new -subj="/" -key privateKey.key -out req.pem -openssl x509 -req -in req.pem -signkey privateKey.key -out certificate.crt -extensions p2p_ext -extfile ./openssl.cfg -openssl x509 -outform der -in certificate.crt -out ed448.der - -#RSA_PKCS1_SHA256 (works): -openssl genpkey -algorithm rsa -out privateKey.key -openssl req -new -subj="/" -key privateKey.key -out req.pem -openssl x509 -req -in req.pem -signkey privateKey.key -sha256 -out certificate.crt -extensions p2p_ext -extfile ./openssl.cfg -openssl x509 -outform der -in certificate.crt -out rsa_pkcs1_sha256.der - -#RSA_PKCS1_SHA384 (works): -# reuse privateKey.key and req.pem -openssl x509 -req -in req.pem -signkey privateKey.key -sha384 -out certificate.crt -extensions p2p_ext -extfile ./openssl.cfg -openssl x509 -outform der -in certificate.crt -out rsa_pkcs1_sha384.der - -#RSA_PKCS1_SHA512 (works): -# reuse privateKey.key and req.pem -openssl x509 -req -in req.pem -signkey privateKey.key -sha512 -out certificate.crt -extensions p2p_ext -extfile ./openssl.cfg -openssl x509 -outform der -in certificate.crt -out rsa_pkcs1_sha512.der - -#RSA-PSS TODO -# openssl genpkey -algorithm rsa-pss -pkeyopt rsa_keygen_bits:2048 -pkeyopt rsa_keygen_pubexp:3 -out privateKey.key -# # -sigopt rsa_pss_saltlen:20 -# # -sigopt rsa_padding_mode:pss -# # -sigopt rsa_mgf1_md:sha256 -# openssl req -x509 -nodes -days 365 -subj="/" -key privateKey.key -sha256 -sigopt rsa_pss_saltlen:20 -sigopt rsa_padding_mode:pss -sigopt rsa_mgf1_md:sha256 -out certificate.crt - -#ECDSA_NISTP256_SHA256 (works): -openssl genpkey -algorithm EC -pkeyopt ec_paramgen_curve:P-256 -out privateKey.key -openssl req -new -subj="/" -key privateKey.key -out req.pem -openssl x509 -req -in req.pem -signkey privateKey.key -sha256 -out certificate.crt -extensions p2p_ext -extfile ./openssl.cfg -openssl x509 -outform der -in certificate.crt -out nistp256_sha256.der - -#ECDSA_NISTP384_SHA384 (works): -openssl genpkey -algorithm EC -pkeyopt ec_paramgen_curve:P-384 -out privateKey.key -openssl req -new -subj="/" -key privateKey.key -out req.pem -openssl x509 -req -in req.pem -signkey privateKey.key -sha384 -out certificate.crt -extensions p2p_ext -extfile ./openssl.cfg -openssl x509 -outform der -in certificate.crt -out nistp384_sha384.der - -#ECDSA_NISTP521_SHA512 (works): -openssl genpkey -algorithm EC -pkeyopt ec_paramgen_curve:P-521 -out privateKey.key -openssl req -new -subj="/" -key privateKey.key -out req.pem -openssl x509 -req -in req.pem -signkey privateKey.key -sha512 -out certificate.crt -extensions p2p_ext -extfile ./openssl.cfg -openssl x509 -outform der -in certificate.crt -out nistp521_sha512.der - -#ECDSA_NISTP384_SHA256 (must fail): -openssl genpkey -algorithm EC -pkeyopt ec_paramgen_curve:P-384 -out privateKey.key -openssl req -new -subj="/" -key privateKey.key -out req.pem -openssl x509 -req -in req.pem -signkey privateKey.key -sha256 -out certificate.crt -extensions p2p_ext -extfile ./openssl.cfg -openssl x509 -outform der -in certificate.crt -out nistp384_sha256.der - - -# Remove tmp files - -rm req.pem certificate.crt privateKey.key diff --git a/client/litep2p/src/crypto/tls/test_assets/nistp256_sha256.der b/client/litep2p/src/crypto/tls/test_assets/nistp256_sha256.der deleted file mode 100644 index 8023645e9b07e58ab410f71564699cc8433aebe8..0000000000000000000000000000000000000000 GIT binary patch literal 0 HcmV?d00001 literal 388 zcmXqLVr(#IVpLzi%*4pVBoeuh$A9gw`qI<8*#%$TwHM>@k+^8U#m1r4=5fxJg_+5K z!9Y%&*T~S&$k5cl(9podGz!Qy0y0gYT%d|b17S9Huns0hs8(i1c4j9A7AM7ZKl|>U z^|{d|0l!Z7IyXK-&0$Y zm%ozhEISpuY;nCotwA*#mo^(C3uE)5C`KUo&yr=3!J@*!D5P*dW#SRhw;bN>FFx?x z_HsPJ9P@AK&r7zd|L3fj{`~J9einx*E9M2AQTeO6Wy{=WqK9kMnv-5!KYn1^@0tt3 zccw6fYklcRY4~@P{qOzsUR(cP@bVZrRqVBo@}pf&g3 zq6+cO<~!|rv8ifqPo<1>?AvUWbS{K0Vf^U+O^8XswRaWE=@pM=?bs@wcDHSHh2YAC STQ@y5C|BTrHNV5|x;FscJeIfs diff --git a/client/litep2p/src/crypto/tls/test_assets/nistp384_sha256.der b/client/litep2p/src/crypto/tls/test_assets/nistp384_sha256.der deleted file mode 100644 index 5d76fa8f4a90ca3bba0a22150e4805d2ca9380a7..0000000000000000000000000000000000000000 GIT binary patch literal 0 HcmV?d00001 literal 450 zcmXqLV%%rY#OShsnTe5!Nkl#(dWKqA?wTq_--bescs|x?tDhTiv2kd%d7QIlVP-O5 zFpv}HH8M0bGBhV>ja9pmg+YlqiGjuNWmseH z9Le0PpTAFUy=}kTa^Zx4Gk;#~J0!ko+G1y4v%mg-uB*G(GR7A_TK-f+tgawWX#0Bc zy0kNYFF)Xu$jO|1jxBMnk=@6YGcR`iHDl^K=hTvt*{`|GCcHx6NoM+k#q|cY2Gwj_ z+H8z0jLnOp7=hqFOO`cq%ekGextUSCuds7>a(4+aRfv`!C~?lwexjwC0r@ jpXU1e{N8I>`jY#B^pUBD$~Q(%uW#7c(2*{x@@WzPu{5%@ diff --git a/client/litep2p/src/crypto/tls/test_assets/nistp384_sha384.der b/client/litep2p/src/crypto/tls/test_assets/nistp384_sha384.der deleted file mode 100644 index a81a5ce1ab748be7714c385ae4f3525bd9024fd2..0000000000000000000000000000000000000000 GIT binary patch literal 0 HcmV?d00001 literal 450 zcmXqLV%%rY#OShsnTe5!Nu=gc^!`1Y^>UiEDTD_NenC=ldlAS z-lX}{j&IKH@XKv(|9?$h-Fdi~adXzn9MP9gnKspYlUZqhJm<*YwpSbzECPgz*Js`? z7y56bbH40i%;WC(w-ZZ!x9{fPQ!RKkN9lLsuMDs24O1RX+Q-5+r|-@alg0H0wFcE} zT-t1mER4;Iq8NeTKTDQD28#*@qmaV=l!-?~-*R}jzxcp&+sp9?bIiY`KQGy;{-3jA z`t!ec_*opLte6*cM&+;OmMwFii5{+1YfgG`{rG`tziTcC-}PyRYgN zC(DVX8|v-Lrrsz%C=+1Fx=}fyNxddUMXYWeTi^!~CIio?eBN}+>C6G^l>dC5Y#Z=n lNz%U>Th1%0D~@{HF0c6_Joi(}?Ch7f&pvow&e6Qe1OS~`yc+-j diff --git a/client/litep2p/src/crypto/tls/test_assets/nistp521_sha512.der b/client/litep2p/src/crypto/tls/test_assets/nistp521_sha512.der deleted file mode 100644 index 2846361f278e37f4338e35848304af02af4721e5..0000000000000000000000000000000000000000 GIT binary patch literal 0 HcmV?d00001 literal 525 zcmXqLV&XJtV$52=%*4pVBqDR5TjaPvpWN2z&XlP(!8U^GU0huOHE>K0|Yy$x{cCZ#EMmARMMivHT=EgP#7Dka- zL6Wn6m|iqy516L5b>s6TtB%xP{c$aQ?$V%ZPgi$sZ+4p}wtwyY;FcE`)-f*XWvR1avZ&&|oGI`uZV*mRCW#>&gT-yYb~l)AT5b#c8xtwA*#mo^(C3uE)5C`KUo z&yr=3!J@*!D5P*dW#SRhw;bN>FFx?x_HsPJ9P@AK&r7zd|L3fj{`~J9einx*E9M2A zQTeO6Wy{=WqK9kMnv-5!KYn1^@0tt3ccw6fYklcRY4~@P{qOzsUR(cP@b!O7g%0}QSXCMSj|%2T3ly_8jatJb(T)^6+0-`4B(ZMk|iKikOg zE7wV^x6;2mb-V1e$mx?#HTE(@+^))3nl5JWdGW>YsO9R{W@R)mIWa!J;`~DKE5koE z<)Zly_Dr-$&9`PRS9U2HPnZ=8L8z9UOtY2y{g=1#{X%U7@a7CkZ0 LW8!JtW5NgkxUAVe diff --git a/client/litep2p/src/crypto/tls/test_assets/openssl.cfg b/client/litep2p/src/crypto/tls/test_assets/openssl.cfg deleted file mode 100644 index 62f02bae..00000000 --- a/client/litep2p/src/crypto/tls/test_assets/openssl.cfg +++ /dev/null @@ -1,6 +0,0 @@ -[ p2p_ext ] -1.3.6.1.4.1.53594.1.1 = critical,ASN1:SEQUENCE:ExtBody - 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-#[tokio::test] -async fn can_establish_connection() { - let mut swarm1 = make_swarm(); - let mut swarm2 = make_swarm(); - - let listen_address = { - let expected_listener_id = swarm1.listen_on(Protocol::Memory(0).into()).unwrap(); - - loop { - match swarm1.next().await.unwrap() { - SwarmEvent::NewListenAddr { - address, - listener_id, - } if listener_id == expected_listener_id => break address, - _ => continue, - }; - } - }; - swarm2.dial(listen_address).unwrap(); - - let await_inbound_connection = async { - loop { - match swarm1.next().await.unwrap() { - SwarmEvent::ConnectionEstablished { peer_id, .. } => break peer_id, - SwarmEvent::IncomingConnectionError { error, .. } => { - panic!("Incoming connection failed: {error}") - } - _ => continue, - }; - } - }; - let await_outbound_connection = async { - loop { - match swarm2.next().await.unwrap() { - SwarmEvent::ConnectionEstablished { peer_id, .. } => break peer_id, - SwarmEvent::OutgoingConnectionError { error, .. } => { - panic!("Failed to dial: {error}") - } - _ => continue, - }; - } - }; - - let (inbound_peer_id, outbound_peer_id) = - future::join(await_inbound_connection, await_outbound_connection).await; - - assert_eq!(&inbound_peer_id, swarm2.local_peer_id()); - assert_eq!(&outbound_peer_id, swarm1.local_peer_id()); -} - -fn make_swarm() -> Swarm { - let identity = libp2p_identity::Keypair::generate_ed25519(); - - let transport = MemoryTransport::default() - .upgrade(Version::V1) - .authenticate(libp2p_tls::Config::new(&identity).unwrap()) - .multiplex(libp2p_yamux::YamuxConfig::default()) - .boxed(); - - SwarmBuilder::without_executor( - transport, - keep_alive::Behaviour, - identity.public().to_peer_id(), - ) - .build() -} diff --git a/client/litep2p/src/crypto/tls/verifier.rs b/client/litep2p/src/crypto/tls/verifier.rs deleted file mode 100644 index 8db553ed..00000000 --- a/client/litep2p/src/crypto/tls/verifier.rs +++ /dev/null @@ -1,240 +0,0 @@ -// Copyright 2021 Parity Technologies (UK) Ltd. -// -// Permission is hereby granted, free of charge, to any person obtaining a -// copy of this software and associated documentation files (the "Software"), -// to deal in the Software without restriction, including without limitation -// the rights to use, copy, modify, merge, publish, distribute, sublicense, -// and/or sell copies of the Software, and to permit persons to whom the -// Software is furnished to do so, subject to the following conditions: -// -// The above copyright notice and this permission notice shall be included in -// all copies or substantial portions of the Software. -// -// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS -// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, -// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE -// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER -// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING -// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER -// DEALINGS IN THE SOFTWARE. - -//! TLS 1.3 certificates and handshakes handling for libp2p -//! -//! This module handles a verification of a client/server certificate chain -//! and signatures allegedly by the given certificates. - -use crate::{crypto::tls::certificate, PeerId}; - -use rustls::{ - client::danger::{HandshakeSignatureValid, ServerCertVerified, ServerCertVerifier}, - pki_types::{CertificateDer, ServerName, UnixTime}, - server::danger::{ClientCertVerified, ClientCertVerifier}, - DigitallySignedStruct, DistinguishedName, SignatureScheme, -}; - -/// The protocol versions supported by this verifier. -/// -/// The spec says: -/// -/// > The libp2p handshake uses TLS 1.3 (and higher). -/// > Endpoints MUST NOT negotiate lower TLS versions. -pub static PROTOCOL_VERSIONS: &[&rustls::SupportedProtocolVersion] = &[&rustls::version::TLS13]; - -/// Implementation of the `rustls` certificate verification traits for libp2p. -/// -/// Only TLS 1.3 is supported. TLS 1.2 should be disabled in the configuration of `rustls`. -#[derive(Debug)] -pub struct Libp2pCertificateVerifier { - /// The peer ID we intend to connect to - remote_peer_id: Option, -} - -/// libp2p requires the following of X.509 server certificate chains: -/// -/// - Exactly one certificate must be presented. -/// - The certificate must be self-signed. -/// - The certificate must have a valid libp2p extension that includes a signature of its public -/// key. -impl Libp2pCertificateVerifier { - pub fn new() -> Self { - Self { remote_peer_id: None } - } - - pub fn with_remote_peer_id(remote_peer_id: Option) -> Self { - Self { remote_peer_id } - } - - /// Return the list of SignatureSchemes that this verifier will handle, - /// in `verify_tls12_signature` and `verify_tls13_signature` calls. - /// - /// This should be in priority order, with the most preferred first. - fn verification_schemes() -> Vec { - vec![ - // TODO SignatureScheme::ECDSA_NISTP521_SHA512 is not supported by `ring` yet - SignatureScheme::ECDSA_NISTP384_SHA384, - SignatureScheme::ECDSA_NISTP256_SHA256, - // TODO SignatureScheme::ED448 is not supported by `ring` yet - SignatureScheme::ED25519, - // In particular, RSA SHOULD NOT be used unless - // no elliptic curve algorithms are supported. - SignatureScheme::RSA_PSS_SHA512, - SignatureScheme::RSA_PSS_SHA384, - SignatureScheme::RSA_PSS_SHA256, - SignatureScheme::RSA_PKCS1_SHA512, - SignatureScheme::RSA_PKCS1_SHA384, - SignatureScheme::RSA_PKCS1_SHA256, - ] - } -} - -impl ServerCertVerifier for Libp2pCertificateVerifier { - fn verify_server_cert( - &self, - end_entity: &CertificateDer<'_>, - intermediates: &[CertificateDer<'_>], - _server_name: &ServerName<'_>, - _ocsp_response: &[u8], - _now: UnixTime, - ) -> Result { - let peer_id = verify_presented_certs(end_entity, intermediates)?; - - if let Some(remote_peer_id) = self.remote_peer_id { - // The public host key allows the peer to calculate the peer ID of the peer - // it is connecting to. Clients MUST verify that the peer ID derived from - // the certificate matches the peer ID they intended to connect to, - // and MUST abort the connection if there is a mismatch. - if remote_peer_id != peer_id { - return Err(rustls::Error::PeerMisbehaved( - rustls::PeerMisbehaved::SignedKxWithWrongAlgorithm, - )); - } - } - - Ok(ServerCertVerified::assertion()) - } - - fn verify_tls12_signature( - &self, - _message: &[u8], - _cert: &CertificateDer<'_>, - _dss: &DigitallySignedStruct, - ) -> Result { - unreachable!("`PROTOCOL_VERSIONS` only allows TLS 1.3") - } - - fn verify_tls13_signature( - &self, - message: &[u8], - cert: &CertificateDer<'_>, - dss: &DigitallySignedStruct, - ) -> Result { - verify_tls13_signature(cert, dss.scheme, message, dss.signature()) - } - - fn supported_verify_schemes(&self) -> Vec { - Self::verification_schemes() - } -} - -/// libp2p requires the following of X.509 client certificate chains: -/// -/// - Exactly one certificate must be presented. In particular, client authentication is mandatory -/// in libp2p. -/// - The certificate must be self-signed. -/// - The certificate must have a valid libp2p extension that includes a signature of its public -/// key. -impl ClientCertVerifier for Libp2pCertificateVerifier { - fn offer_client_auth(&self) -> bool { - true - } - - fn root_hint_subjects(&self) -> &[DistinguishedName] { - &[] - } - - fn verify_client_cert( - &self, - end_entity: &CertificateDer<'_>, - intermediates: &[CertificateDer<'_>], - _now: UnixTime, - ) -> Result { - let _: PeerId = verify_presented_certs(end_entity, intermediates)?; - - Ok(ClientCertVerified::assertion()) - } - - fn verify_tls12_signature( - &self, - _message: &[u8], - _cert: &CertificateDer<'_>, - _dss: &DigitallySignedStruct, - ) -> Result { - unreachable!("`PROTOCOL_VERSIONS` only allows TLS 1.3") - } - - fn verify_tls13_signature( - &self, - message: &[u8], - cert: &CertificateDer<'_>, - dss: &DigitallySignedStruct, - ) -> Result { - verify_tls13_signature(cert, dss.scheme, message, dss.signature()) - } - - fn supported_verify_schemes(&self) -> Vec { - Self::verification_schemes() - } -} - -/// When receiving the certificate chain, an endpoint -/// MUST check these conditions and abort the connection attempt if -/// (a) the presented certificate is not yet valid, OR -/// (b) if it is expired. -/// Endpoints MUST abort the connection attempt if more than one certificate is received, -/// or if the certificate's self-signature is not valid. -fn verify_presented_certs( - end_entity: &CertificateDer<'_>, - intermediates: &[CertificateDer<'_>], -) -> Result { - if !intermediates.is_empty() { - return Err(rustls::Error::General("libp2p-tls requires exactly one certificate".into())); - } - - let cert = certificate::parse(end_entity)?; - - Ok(cert.peer_id()) -} - -fn verify_tls13_signature( - cert: &CertificateDer<'_>, - signature_scheme: SignatureScheme, - message: &[u8], - signature: &[u8], -) -> Result { - certificate::parse(cert)?.verify_signature(signature_scheme, message, signature)?; - - Ok(HandshakeSignatureValid::assertion()) -} - -impl From for rustls::Error { - fn from(certificate::ParseError(e): certificate::ParseError) -> Self { - use webpki::Error::*; - match e { - BadDer => rustls::Error::InvalidCertificate(rustls::CertificateError::BadEncoding), - e => rustls::Error::General(format!("invalid peer certificate: {e}")), - } - } -} - -impl From for rustls::Error { - fn from(certificate::VerificationError(e): certificate::VerificationError) -> Self { - use webpki::Error::*; - match e { - InvalidSignatureForPublicKey => - rustls::Error::InvalidCertificate(rustls::CertificateError::BadSignature), - UnsupportedSignatureAlgorithm | UnsupportedSignatureAlgorithmForPublicKey => - rustls::Error::General("unsupported signature algorithm".into()), - e => rustls::Error::General(format!("invalid peer certificate: {e}")), - } - } -} diff --git a/client/litep2p/src/transport/mod.rs b/client/litep2p/src/transport/mod.rs index eb695d04..9d715c86 100644 --- a/client/litep2p/src/transport/mod.rs +++ b/client/litep2p/src/transport/mod.rs @@ -29,11 +29,7 @@ use multiaddr::Multiaddr; use std::{fmt::Debug, sync::Arc, time::Duration}; pub(crate) mod common; -#[cfg(feature = "quic")] -pub mod quic; pub mod tcp; -#[cfg(feature = "webrtc")] -pub mod webrtc; #[cfg(feature = "websocket")] pub mod websocket; diff --git a/client/litep2p/src/transport/quic/config.rs b/client/litep2p/src/transport/quic/config.rs deleted file mode 100644 index 98fe1dd7..00000000 --- a/client/litep2p/src/transport/quic/config.rs +++ /dev/null @@ -1,58 +0,0 @@ -// Copyright 2023 litep2p developers -// -// Permission is hereby granted, free of charge, to any person obtaining a -// copy of this software and associated documentation files (the "Software"), -// to deal in the Software without restriction, including without limitation -// the rights to use, copy, modify, merge, publish, distribute, sublicense, -// and/or sell copies of the Software, and to permit persons to whom the -// Software is furnished to do so, subject to the following conditions: -// -// The above copyright notice and this permission notice shall be included in -// all copies or substantial portions of the Software. -// -// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS -// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, -// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE -// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER -// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING -// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER -// DEALINGS IN THE SOFTWARE. - -//! QUIC transport configuration. - -use crate::transport::{CONNECTION_OPEN_TIMEOUT, SUBSTREAM_OPEN_TIMEOUT}; - -use multiaddr::Multiaddr; - -use std::time::Duration; - -/// QUIC transport configuration. -#[derive(Debug)] -pub struct Config { - /// Listen address for the transport. - /// - /// Default listen addres is `/ip4/127.0.0.1/udp/0/quic-v1`. - pub listen_addresses: Vec, - - /// Connection open timeout. - /// - /// How long should litep2p wait for a connection to be opend before the host - /// is deemed unreachable. - pub connection_open_timeout: Duration, - - /// Substream open timeout. - /// - /// How long should litep2p wait for a substream to be opened before considering - /// the substream rejected. - pub substream_open_timeout: Duration, -} - -impl Default for Config { - fn default() -> Self { - Self { - listen_addresses: vec!["/ip4/127.0.0.1/udp/0/quic-v1".parse().expect("valid address")], - connection_open_timeout: CONNECTION_OPEN_TIMEOUT, - substream_open_timeout: SUBSTREAM_OPEN_TIMEOUT, - } - } -} diff --git a/client/litep2p/src/transport/quic/connection.rs b/client/litep2p/src/transport/quic/connection.rs deleted file mode 100644 index d4cb69ff..00000000 --- a/client/litep2p/src/transport/quic/connection.rs +++ /dev/null @@ -1,409 +0,0 @@ -// Copyright 2023 litep2p developers -// -// Permission is hereby granted, free of charge, to any person obtaining a -// copy of this software and associated documentation files (the "Software"), -// to deal in the Software without restriction, including without limitation -// the rights to use, copy, modify, merge, publish, distribute, sublicense, -// and/or sell copies of the Software, and to permit persons to whom the -// Software is furnished to do so, subject to the following conditions: -// -// The above copyright notice and this permission notice shall be included in -// all copies or substantial portions of the Software. -// -// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS -// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, -// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE -// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER -// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING -// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER -// DEALINGS IN THE SOFTWARE. - -//! QUIC connection. - -use std::{collections::HashMap, time::Duration}; - -use crate::{ - config::Role, - error::{Error, NegotiationError, SubstreamError}, - multistream_select::{dialer_select_proto, listener_select_proto, Negotiated, Version}, - protocol::{Direction, Permit, ProtocolCommand, ProtocolSet, SubstreamKeepAlive}, - substream, - transport::{ - quic::substream::{NegotiatingSubstream, Substream}, - Endpoint, - }, - types::{protocol::ProtocolName, SubstreamId}, - BandwidthSink, PeerId, -}; - -use futures::{future::BoxFuture, stream::FuturesUnordered, AsyncRead, AsyncWrite, StreamExt}; -use quinn::{Connection as QuinnConnection, RecvStream, SendStream}; - -/// Logging target for the file. -const LOG_TARGET: &str = "litep2p::quic::connection"; - -/// QUIC connection error. -#[derive(Debug)] -enum ConnectionError { - /// Timeout - Timeout { - /// Protocol. - protocol: Option, - - /// Substream ID. - substream_id: Option, - }, - - /// Failed to negotiate connection/substream. - FailedToNegotiate { - /// Protocol. - protocol: Option, - - /// Substream ID. - substream_id: Option, - - /// Error. - error: SubstreamError, - }, -} - -struct NegotiatedSubstream { - /// Substream direction. - direction: Direction, - - /// Substream ID. - substream_id: SubstreamId, - - /// Protocol name. - protocol: ProtocolName, - - /// Substream used to send data. - sender: SendStream, - - /// Substream used to receive data. - receiver: RecvStream, - - /// Permit. - permit: Permit, - - /// Whether this substream should keep connection alive while it exists. - keep_alive: SubstreamKeepAlive, -} - -/// QUIC connection. -pub struct QuicConnection { - /// Remote peer ID. - peer: PeerId, - - /// Endpoint. - endpoint: Endpoint, - - /// Substream open timeout. - substream_open_timeout: Duration, - - /// QUIC connection. - connection: QuinnConnection, - - /// Protocol set. - protocol_set: ProtocolSet, - - /// Bandwidth sink. - bandwidth_sink: BandwidthSink, - - /// Pending substreams. - pending_substreams: - FuturesUnordered>>, -} - -impl QuicConnection { - /// Creates a new [`QuicConnection`]. - pub fn new( - peer: PeerId, - endpoint: Endpoint, - connection: QuinnConnection, - protocol_set: ProtocolSet, - bandwidth_sink: BandwidthSink, - substream_open_timeout: Duration, - ) -> Self { - Self { - peer, - endpoint, - connection, - protocol_set, - bandwidth_sink, - substream_open_timeout, - pending_substreams: FuturesUnordered::new(), - } - } - - /// Negotiate protocol. - async fn negotiate_protocol( - stream: S, - role: &Role, - protocols: Vec<&str>, - ) -> Result<(Negotiated, ProtocolName), NegotiationError> { - tracing::trace!(target: LOG_TARGET, ?protocols, "negotiating protocols"); - - let (protocol, socket) = match role { - Role::Dialer => dialer_select_proto(stream, protocols, Version::V1).await, - Role::Listener => listener_select_proto(stream, protocols).await, - } - .map_err(NegotiationError::MultistreamSelectError)?; - - tracing::trace!(target: LOG_TARGET, ?protocol, "protocol negotiated"); - - Ok((socket, ProtocolName::from(protocol.to_string()))) - } - - /// Open substream for `protocol`. - async fn open_substream( - handle: QuinnConnection, - permit: Permit, - substream_id: SubstreamId, - protocol: ProtocolName, - fallback_names: Vec, - keep_alive: SubstreamKeepAlive, - ) -> Result { - tracing::debug!(target: LOG_TARGET, ?protocol, ?substream_id, "open substream"); - - let stream = match handle.open_bi().await { - Ok((send_stream, recv_stream)) => NegotiatingSubstream::new(send_stream, recv_stream), - Err(error) => return Err(NegotiationError::Quic(error.into()).into()), - }; - - // TODO: https://github.com/paritytech/litep2p/issues/346 protocols don't change after - // they've been initialized so this should be done only once - let protocols = std::iter::once(&*protocol) - .chain(fallback_names.iter().map(|protocol| &**protocol)) - .collect(); - - let (io, protocol) = Self::negotiate_protocol(stream, &Role::Dialer, protocols).await?; - - tracing::trace!( - target: LOG_TARGET, - ?protocol, - ?substream_id, - "substream accepted and negotiated" - ); - - let stream = io.inner(); - let (sender, receiver) = stream.into_parts(); - - Ok(NegotiatedSubstream { - sender, - receiver, - substream_id, - direction: Direction::Outbound(substream_id), - permit, - protocol, - keep_alive, - }) - } - - /// Accept bidirectional substream from rmeote peer. - async fn accept_substream( - stream: NegotiatingSubstream, - protocols: HashMap, - substream_id: SubstreamId, - permit: Permit, - ) -> Result { - tracing::trace!( - target: LOG_TARGET, - ?substream_id, - "accept inbound substream" - ); - - let protocol_names = protocols.keys().map(|protocol| &**protocol).collect::>(); - let (io, protocol) = - Self::negotiate_protocol(stream, &Role::Listener, protocol_names).await?; - let keep_alive = *protocols.get(&protocol).expect("protocol to be one of the keys"); - - tracing::trace!( - target: LOG_TARGET, - ?substream_id, - ?protocol, - "substream accepted and negotiated" - ); - - let stream = io.inner(); - let (sender, receiver) = stream.into_parts(); - - Ok(NegotiatedSubstream { - permit, - sender, - receiver, - protocol, - substream_id, - direction: Direction::Inbound, - keep_alive, - }) - } - - /// Start the connection event loop without notifying protocols. - /// This is used when protocols have already been notified during accept(). - pub(crate) async fn start(mut self) -> crate::Result<()> { - loop { - tokio::select! { - event = self.connection.accept_bi() => match event { - Ok((send_stream, receive_stream)) => { - - let substream = self.protocol_set.next_substream_id(); - let protocols = self.protocol_set.protocols_with_keep_alives(); - let permit = self.protocol_set.try_get_permit().ok_or(Error::ConnectionClosed)?; - let stream = NegotiatingSubstream::new(send_stream, receive_stream); - let substream_open_timeout = self.substream_open_timeout; - - self.pending_substreams.push(Box::pin(async move { - match tokio::time::timeout( - substream_open_timeout, - Self::accept_substream(stream, protocols, substream, permit), - ) - .await - { - Ok(Ok(substream)) => Ok(substream), - Ok(Err(error)) => Err(ConnectionError::FailedToNegotiate { - protocol: None, - substream_id: None, - error: SubstreamError::NegotiationError(error), - }), - Err(_) => Err(ConnectionError::Timeout { - protocol: None, - substream_id: None - }), - } - })); - } - Err(error) => { - tracing::debug!(target: LOG_TARGET, peer = ?self.peer, ?error, "failed to accept substream"); - return self.protocol_set.report_connection_closed(self.peer, self.endpoint.connection_id()).await; - } - }, - substream = self.pending_substreams.select_next_some(), if !self.pending_substreams.is_empty() => { - match substream { - Err(error) => { - tracing::debug!( - target: LOG_TARGET, - ?error, - "failed to accept/open substream", - ); - - let (protocol, substream_id, error) = match error { - ConnectionError::Timeout { protocol, substream_id } => { - (protocol, substream_id, SubstreamError::NegotiationError(NegotiationError::Timeout)) - } - ConnectionError::FailedToNegotiate { protocol, substream_id, error } => { - (protocol, substream_id, error) - } - }; - - if let (Some(protocol), Some(substream_id)) = (protocol, substream_id) { - self.protocol_set - .report_substream_open_failure(protocol, substream_id, error) - .await?; - } - } - Ok(substream) => { - let protocol = substream.protocol.clone(); - let substream_id = substream.substream_id; - let direction = substream.direction; - let bandwidth_sink = self.bandwidth_sink.clone(); - let opening_permit = substream.permit; - let lifetime_permit = - substream.keep_alive.then(|| opening_permit.clone()); - - let substream = substream::Substream::new_quic( - self.peer, - substream_id, - Substream::new( - lifetime_permit, - substream.sender, - substream.receiver, - bandwidth_sink - ), - self.protocol_set.protocol_codec(&protocol) - ); - - self.protocol_set.report_substream_open( - self.peer, - protocol, - direction, - substream, - opening_permit, - ).await?; - } - } - } - command = self.protocol_set.next() => match command { - None => { - tracing::debug!( - target: LOG_TARGET, - peer = ?self.peer, - connection_id = ?self.endpoint.connection_id(), - "protocols have dropped connection" - ); - return self.protocol_set.report_connection_closed( - self.peer, - self.endpoint.connection_id(), - ).await; - } - Some(ProtocolCommand::OpenSubstream { - protocol, - fallback_names, - substream_id, - permit, - keep_alive, - connection_id: _, - }) => { - let connection = self.connection.clone(); - let substream_open_timeout = self.substream_open_timeout; - - tracing::trace!( - target: LOG_TARGET, - ?protocol, - ?fallback_names, - ?substream_id, - "open substream" - ); - - self.pending_substreams.push(Box::pin(async move { - match tokio::time::timeout( - substream_open_timeout, - Self::open_substream( - connection, - permit, - substream_id, - protocol.clone(), - fallback_names, - keep_alive, - ), - ) - .await - { - Ok(Ok(substream)) => Ok(substream), - Ok(Err(error)) => Err(ConnectionError::FailedToNegotiate { - protocol: Some(protocol), - substream_id: Some(substream_id), - error, - }), - Err(_) => Err(ConnectionError::Timeout { - protocol: None, - substream_id: None - }), - } - })); - } - Some(ProtocolCommand::ForceClose) => { - tracing::debug!( - target: LOG_TARGET, - peer = ?self.peer, - connection_id = ?self.endpoint.connection_id(), - "force closing connection", - ); - - return self.protocol_set.report_connection_closed(self.peer, self.endpoint.connection_id()).await; - } - } - } - } - } -} diff --git a/client/litep2p/src/transport/quic/listener.rs b/client/litep2p/src/transport/quic/listener.rs deleted file mode 100644 index 475a6372..00000000 --- a/client/litep2p/src/transport/quic/listener.rs +++ /dev/null @@ -1,429 +0,0 @@ -// Copyright 2023 litep2p developers -// -// Permission is hereby granted, free of charge, to any person obtaining a -// copy of this software and associated documentation files (the "Software"), -// to deal in the Software without restriction, including without limitation -// the rights to use, copy, modify, merge, publish, distribute, sublicense, -// and/or sell copies of the Software, and to permit persons to whom the -// Software is furnished to do so, subject to the following conditions: -// -// The above copyright notice and this permission notice shall be included in -// all copies or substantial portions of the Software. -// -// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS -// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, -// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE -// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER -// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING -// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER -// DEALINGS IN THE SOFTWARE. - -use crate::{ - crypto::{dilithium::Keypair, tls::make_server_config}, - error::AddressError, - PeerId, -}; - -use futures::{future::BoxFuture, stream::FuturesUnordered, FutureExt, Stream, StreamExt}; -use multiaddr::{Multiaddr, Protocol}; -use quinn::{crypto::rustls::QuicServerConfig, Connecting, Endpoint, ServerConfig}; - -use std::{ - net::{IpAddr, SocketAddr}, - pin::Pin, - sync::Arc, - task::{Context, Poll}, -}; - -/// Logging target for the file. -const LOG_TARGET: &str = "litep2p::quic::listener"; - -/// QUIC listener. -pub struct QuicListener { - /// Listen addresses. - _listen_addresses: Vec, - - /// Listeners. - listeners: Vec, - - /// Incoming connections. - incoming: FuturesUnordered>>, -} - -impl QuicListener { - /// Create new [`QuicListener`]. - pub fn new( - keypair: &Keypair, - addresses: Vec, - ) -> crate::Result<(Self, Vec)> { - let mut listeners: Vec = Vec::new(); - let mut listen_addresses = Vec::new(); - - for address in addresses.into_iter() { - let (listen_address, _) = Self::get_socket_address(&address)?; - let rustls_config = make_server_config(keypair).expect("to succeed"); - // Convert rustls config to quinn's QuicServerConfig - let quic_server_config = - QuicServerConfig::try_from(rustls_config).expect("valid rustls config"); - let server_config = ServerConfig::with_crypto(Arc::new(quic_server_config)); - let listener = Endpoint::server(server_config, listen_address).unwrap(); - - let listen_address = listener.local_addr()?; - listen_addresses.push(listen_address); - listeners.push(listener); - } - - let listen_multi_addresses = listen_addresses - .iter() - .cloned() - .map(|address| { - Multiaddr::empty() - .with(Protocol::from(address.ip())) - .with(Protocol::Udp(address.port())) - .with(Protocol::QuicV1) - }) - .collect(); - - Ok(( - Self { - incoming: listeners - .iter_mut() - .enumerate() - .map(|(i, listener)| { - let inner = listener.clone(); - async move { - // Quinn 0.11: accept() returns Incoming, which we need to - // convert to Connecting by calling accept() - let incoming = inner.accept().await?; - let connecting = incoming.accept().ok()?; - Some((i, connecting)) - } - .boxed() - }) - .collect(), - listeners, - _listen_addresses: listen_addresses, - }, - listen_multi_addresses, - )) - } - - /// Extract socket address and `PeerId`, if found, from `address`. - pub fn get_socket_address( - address: &Multiaddr, - ) -> Result<(SocketAddr, Option), AddressError> { - tracing::trace!(target: LOG_TARGET, ?address, "parse multi address"); - - let mut iter = address.iter(); - let socket_address = match iter.next() { - Some(Protocol::Ip6(address)) => match iter.next() { - Some(Protocol::Udp(port)) => SocketAddr::new(IpAddr::V6(address), port), - protocol => { - tracing::error!( - target: LOG_TARGET, - ?protocol, - "invalid transport protocol, expected `QuicV1`", - ); - return Err(AddressError::InvalidProtocol); - }, - }, - Some(Protocol::Ip4(address)) => match iter.next() { - Some(Protocol::Udp(port)) => SocketAddr::new(IpAddr::V4(address), port), - protocol => { - tracing::error!( - target: LOG_TARGET, - ?protocol, - "invalid transport protocol, expected `QuicV1`", - ); - return Err(AddressError::InvalidProtocol); - }, - }, - protocol => { - tracing::error!(target: LOG_TARGET, ?protocol, "invalid transport protocol"); - return Err(AddressError::InvalidProtocol); - }, - }; - - // verify that quic exists - match iter.next() { - Some(Protocol::QuicV1) => {}, - _ => return Err(AddressError::InvalidProtocol), - } - - let maybe_peer = match iter.next() { - Some(Protocol::P2p(multihash)) => Some(PeerId::from_multihash(multihash)?), - None => None, - protocol => { - tracing::error!( - target: LOG_TARGET, - ?protocol, - "invalid protocol, expected `P2p` or `None`" - ); - return Err(AddressError::PeerIdMissing); - }, - }; - - Ok((socket_address, maybe_peer)) - } -} - -impl Stream for QuicListener { - type Item = Connecting; - - fn poll_next(mut self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll> { - if self.incoming.is_empty() { - return Poll::Pending; - } - - match futures::ready!(self.incoming.poll_next_unpin(cx)) { - None => Poll::Ready(None), - Some(None) => Poll::Ready(None), - Some(Some((listener, future))) => { - let inner = self.listeners[listener].clone(); - self.incoming.push( - async move { - let incoming = inner.accept().await?; - let connecting = incoming.accept().ok()?; - Some((listener, connecting)) - } - .boxed(), - ); - - Poll::Ready(Some(future)) - }, - } - } -} - -#[cfg(test)] -mod tests { - use crate::crypto::tls::make_client_config; - - use super::*; - use quinn::{crypto::rustls::QuicClientConfig, ClientConfig}; - use std::net::{IpAddr, Ipv4Addr, Ipv6Addr, SocketAddr}; - - #[test] - fn parse_multiaddresses() { - assert!(QuicListener::get_socket_address( - &"/ip6/::1/udp/8888/quic-v1".parse().expect("valid multiaddress") - ) - .is_ok()); - assert!(QuicListener::get_socket_address( - &"/ip4/127.0.0.1/udp/8888/quic-v1".parse().expect("valid multiaddress") - ) - .is_ok()); - assert!(QuicListener::get_socket_address( - &"/ip6/::1/udp/8888/quic-v1/p2p/12D3KooWT2ouvz5uMmCvHJGzAGRHiqDts5hzXR7NdoQ27pGdzp9Q" - .parse() - .expect("valid multiaddress") - ) - .is_ok()); - assert!(QuicListener::get_socket_address( - &"/ip4/127.0.0.1/udp/8888/quic-v1/p2p/12D3KooWT2ouvz5uMmCvHJGzAGRHiqDts5hzXR7NdoQ27pGdzp9Q" - .parse() - .expect("valid multiaddress") - ) - .is_ok()); - assert!(QuicListener::get_socket_address( - &"/ip6/::1/tcp/8888/quic-v1/p2p/12D3KooWT2ouvz5uMmCvHJGzAGRHiqDts5hzXR7NdoQ27pGdzp9Q" - .parse() - .expect("valid multiaddress") - ) - .is_err()); - assert!(QuicListener::get_socket_address( - &"/ip4/127.0.0.1/udp/8888/p2p/12D3KooWT2ouvz5uMmCvHJGzAGRHiqDts5hzXR7NdoQ27pGdzp9Q" - .parse() - .expect("valid multiaddress") - ) - .is_err()); - assert!(QuicListener::get_socket_address( - &"/ip4/127.0.0.1/tcp/8888/p2p/12D3KooWT2ouvz5uMmCvHJGzAGRHiqDts5hzXR7NdoQ27pGdzp9Q" - .parse() - .expect("valid multiaddress") - ) - .is_err()); - assert!(QuicListener::get_socket_address( - &"/dns/google.com/tcp/8888/p2p/12D3KooWT2ouvz5uMmCvHJGzAGRHiqDts5hzXR7NdoQ27pGdzp9Q" - .parse() - .expect("valid multiaddress") - ) - .is_err()); - assert!(QuicListener::get_socket_address( - &"/ip6/::1/udp/8888/quic-v1/utp".parse().expect("valid multiaddress") - ) - .is_err()); - } - - #[tokio::test] - async fn no_listeners() { - let (mut listener, _) = QuicListener::new(&Keypair::generate(), Vec::new()).unwrap(); - - futures::future::poll_fn(|cx| match listener.poll_next_unpin(cx) { - Poll::Pending => Poll::Ready(()), - event => panic!("unexpected event: {event:?}"), - }) - .await; - } - - #[tokio::test] - async fn one_listener() { - let address: Multiaddr = "/ip6/::1/udp/0/quic-v1".parse().unwrap(); - let keypair = Keypair::generate(); - let peer = PeerId::from_public_key(&keypair.public().into()); - let (mut listener, listen_addresses) = - QuicListener::new(&keypair, vec![address.clone()]).unwrap(); - let Some(Protocol::Udp(port)) = listen_addresses.first().unwrap().clone().iter().nth(1) - else { - panic!("invalid address"); - }; - - let crypto_config = - make_client_config(&Keypair::generate(), Some(peer)).expect("to succeed"); - let quic_client_config = QuicClientConfig::try_from(crypto_config).expect("valid config"); - let client_config = ClientConfig::new(Arc::new(quic_client_config)); - let client = - Endpoint::client(SocketAddr::new(IpAddr::V6(Ipv6Addr::UNSPECIFIED), 0)).unwrap(); - let connection = client - .connect_with(client_config, format!("[::1]:{port}").parse().unwrap(), "l") - .unwrap(); - - let (res1, res2) = tokio::join!( - listener.next(), - Box::pin(async move { - match connection.await { - Ok(connection) => Ok(connection), - Err(error) => Err(error), - } - }) - ); - - assert!(res1.is_some() && res2.is_ok()); - } - - #[tokio::test] - async fn two_listeners() { - let _ = tracing_subscriber::fmt() - .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) - .try_init(); - - let address1: Multiaddr = "/ip6/::1/udp/0/quic-v1".parse().unwrap(); - let address2: Multiaddr = "/ip4/127.0.0.1/udp/0/quic-v1".parse().unwrap(); - let keypair = Keypair::generate(); - let peer = PeerId::from_public_key(&keypair.public().into()); - - let (mut listener, listen_addresses) = - QuicListener::new(&keypair, vec![address1, address2]).unwrap(); - - let Some(Protocol::Udp(port1)) = listen_addresses.first().unwrap().clone().iter().nth(1) - else { - panic!("invalid address"); - }; - - let Some(Protocol::Udp(port2)) = - listen_addresses.iter().nth(1).unwrap().clone().iter().nth(1) - else { - panic!("invalid address"); - }; - - let crypto_config1 = - make_client_config(&Keypair::generate(), Some(peer)).expect("to succeed"); - let quic_client_config1 = QuicClientConfig::try_from(crypto_config1).expect("valid config"); - let client_config1 = ClientConfig::new(Arc::new(quic_client_config1)); - let client1 = - Endpoint::client(SocketAddr::new(IpAddr::V6(Ipv6Addr::UNSPECIFIED), 0)).unwrap(); - let connection1 = client1 - .connect_with(client_config1, format!("[::1]:{port1}").parse().unwrap(), "l") - .unwrap(); - - let crypto_config2 = - make_client_config(&Keypair::generate(), Some(peer)).expect("to succeed"); - let quic_client_config2 = QuicClientConfig::try_from(crypto_config2).expect("valid config"); - let client_config2 = ClientConfig::new(Arc::new(quic_client_config2)); - let client2 = - Endpoint::client(SocketAddr::new(IpAddr::V4(Ipv4Addr::UNSPECIFIED), 0)).unwrap(); - let connection2 = client2 - .connect_with(client_config2, format!("127.0.0.1:{port2}").parse().unwrap(), "l") - .unwrap(); - - tokio::spawn(async move { - match connection1.await { - Ok(connection) => Ok(connection), - Err(error) => Err(error), - } - }); - - tokio::spawn(async move { - match connection2.await { - Ok(connection) => Ok(connection), - Err(error) => Err(error), - } - }); - - for _ in 0..2 { - let _ = listener.next().await; - } - } - - #[tokio::test] - async fn two_clients_dialing_same_address() { - let _ = tracing_subscriber::fmt() - .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) - .try_init(); - - let keypair = Keypair::generate(); - let peer = PeerId::from_public_key(&keypair.public().into()); - - let (mut listener, listen_addresses) = QuicListener::new( - &keypair, - vec![ - "/ip6/::1/udp/0/quic-v1".parse().unwrap(), - "/ip4/127.0.0.1/udp/0/quic-v1".parse().unwrap(), - ], - ) - .unwrap(); - - let Some(Protocol::Udp(port)) = listen_addresses.first().unwrap().clone().iter().nth(1) - else { - panic!("invalid address"); - }; - - let crypto_config1 = - make_client_config(&Keypair::generate(), Some(peer)).expect("to succeed"); - let quic_client_config1 = QuicClientConfig::try_from(crypto_config1).expect("valid config"); - let client_config1 = ClientConfig::new(Arc::new(quic_client_config1)); - let client1 = - Endpoint::client(SocketAddr::new(IpAddr::V6(Ipv6Addr::UNSPECIFIED), 0)).unwrap(); - let connection1 = client1 - .connect_with(client_config1, format!("[::1]:{port}").parse().unwrap(), "l") - .unwrap(); - - let crypto_config2 = - make_client_config(&Keypair::generate(), Some(peer)).expect("to succeed"); - let quic_client_config2 = QuicClientConfig::try_from(crypto_config2).expect("valid config"); - let client_config2 = ClientConfig::new(Arc::new(quic_client_config2)); - let client2 = - Endpoint::client(SocketAddr::new(IpAddr::V6(Ipv6Addr::UNSPECIFIED), 0)).unwrap(); - let connection2 = client2 - .connect_with(client_config2, format!("[::1]:{port}").parse().unwrap(), "l") - .unwrap(); - - tokio::spawn(async move { - match connection1.await { - Ok(connection) => Ok(connection), - Err(error) => Err(error), - } - }); - - tokio::spawn(async move { - match connection2.await { - Ok(connection) => Ok(connection), - Err(error) => Err(error), - } - }); - - for _ in 0..2 { - let _ = listener.next().await; - } - } -} diff --git a/client/litep2p/src/transport/quic/mod.rs b/client/litep2p/src/transport/quic/mod.rs deleted file mode 100644 index e99ff2f7..00000000 --- a/client/litep2p/src/transport/quic/mod.rs +++ /dev/null @@ -1,680 +0,0 @@ -// Copyright 2021 Parity Technologies (UK) Ltd. -// Copyright 2022 Protocol Labs. -// Copyright 2023 litep2p developers -// -// Permission is hereby granted, free of charge, to any person obtaining a -// copy of this software and associated documentation files (the "Software"), -// to deal in the Software without restriction, including without limitation -// the rights to use, copy, modify, merge, publish, distribute, sublicense, -// and/or sell copies of the Software, and to permit persons to whom the -// Software is furnished to do so, subject to the following conditions: -// -// The above copyright notice and this permission notice shall be included in -// all copies or substantial portions of the Software. -// -// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS -// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, -// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE -// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER -// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING -// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER -// DEALINGS IN THE SOFTWARE. - -//! QUIC transport. - -use crate::{ - crypto::tls::make_client_config, - error::{AddressError, DialError, Error, QuicError}, - transport::{ - manager::TransportHandle, - quic::{config::Config as QuicConfig, connection::QuicConnection, listener::QuicListener}, - Endpoint as Litep2pEndpoint, Transport, TransportBuilder, TransportEvent, - }, - types::ConnectionId, - PeerId, -}; - -use futures::{ - future::BoxFuture, - stream::{AbortHandle, FuturesUnordered}, - Stream, StreamExt, TryFutureExt, -}; -use hickory_resolver::TokioResolver; -use multiaddr::{Multiaddr, Protocol}; -use quinn::{ - crypto::rustls::QuicClientConfig, ClientConfig, Connecting, Connection, Endpoint, IdleTimeout, -}; - -use std::{ - collections::HashMap, - net::{IpAddr, Ipv4Addr, Ipv6Addr, SocketAddr}, - pin::Pin, - sync::Arc, - task::{Context, Poll}, -}; - -pub(crate) use substream::Substream; - -mod connection; -mod listener; -mod substream; - -pub mod config; - -/// Logging target for the file. -const LOG_TARGET: &str = "litep2p::quic"; - -#[derive(Debug)] -struct NegotiatedConnection { - /// Remote peer ID. - peer: PeerId, - - /// QUIC connection. - connection: Connection, -} - -#[derive(Debug)] -enum RawConnectionResult { - /// The first successful connection. - Connected { - connection_id: ConnectionId, - address: Multiaddr, - stream: NegotiatedConnection, - errors: Vec<(Multiaddr, DialError)>, - }, - - /// All connection attempts failed. - Failed { connection_id: ConnectionId, errors: Vec<(Multiaddr, DialError)> }, - - /// Future was canceled. - Canceled { connection_id: ConnectionId }, -} - -/// QUIC transport object. -pub(crate) struct QuicTransport { - /// Transport handle. - context: TransportHandle, - - /// Transport config. - config: QuicConfig, - - /// QUIC listener. - listener: QuicListener, - - /// Pending dials. - pending_dials: HashMap, - - /// Pending inbound connections. - pending_inbound_connections: HashMap, - - /// Pending connections. - pending_connections: FuturesUnordered< - BoxFuture<'static, (ConnectionId, Result)>, - >, - - /// Negotiated connections waiting for validation. - pending_open: HashMap, - - /// Pending raw, unnegotiated connections. - pending_raw_connections: FuturesUnordered>, - - /// Opened raw connection, waiting for approval/rejection from `TransportManager`. - opened_raw: HashMap, - - /// Cancel raw connections futures. - /// - /// This is cancelling `Self::pending_raw_connections`. - cancel_futures: HashMap, -} - -impl QuicTransport { - /// Attempt to extract `PeerId` from connection certificates. - fn extract_peer_id(connection: &Connection) -> Option { - let certificates: Box>> = - connection.peer_identity()?.downcast().ok()?; - let p2p_cert = crate::crypto::tls::certificate::parse(certificates.first()?) - .expect("the certificate was validated during TLS handshake; qed"); - - Some(p2p_cert.peer_id()) - } - - /// Handle inbound accepted connection. - fn on_inbound_connection(&mut self, connection_id: ConnectionId, connection: Connecting) { - self.pending_connections.push(Box::pin(async move { - let connection = match connection.await { - Ok(connection) => connection, - Err(error) => return (connection_id, Err(DialError::from(error))), - }; - - let Some(peer) = Self::extract_peer_id(&connection) else { - return ( - connection_id, - Err(crate::error::NegotiationError::Quic(QuicError::InvalidCertificate).into()), - ); - }; - - (connection_id, Ok(NegotiatedConnection { peer, connection })) - })); - } - - /// Handle established connection. - fn on_connection_established( - &mut self, - connection_id: ConnectionId, - result: Result, - ) -> Option { - tracing::debug!(target: LOG_TARGET, ?connection_id, success = result.is_ok(), "connection established"); - - // `on_connection_established()` is called for both inbound and outbound connections - // but `pending_dials` will only contain entries for outbound connections. - let maybe_address = self.pending_dials.remove(&connection_id); - - match result { - Ok(connection) => { - let peer = connection.peer; - let endpoint = maybe_address.map_or( - { - let address = connection.connection.remote_address(); - Litep2pEndpoint::listener( - Multiaddr::empty() - .with(Protocol::from(address.ip())) - .with(Protocol::Udp(address.port())) - .with(Protocol::QuicV1), - connection_id, - ) - }, - |address| Litep2pEndpoint::dialer(address, connection_id), - ); - self.pending_open.insert(connection_id, (connection, endpoint.clone())); - - return Some(TransportEvent::ConnectionEstablished { peer, endpoint }); - }, - Err(error) => { - tracing::debug!(target: LOG_TARGET, ?connection_id, ?error, "failed to establish connection"); - - // since the address was found from `pending_dials`, - // report the error to protocols and `TransportManager` - if let Some(address) = maybe_address { - return Some(TransportEvent::DialFailure { connection_id, address, error }); - } - }, - } - - None - } -} - -impl TransportBuilder for QuicTransport { - type Config = QuicConfig; - type Transport = QuicTransport; - - /// Create new [`QuicTransport`] object. - fn new( - context: TransportHandle, - mut config: Self::Config, - _resolver: Arc, - ) -> crate::Result<(Self, Vec)> - where - Self: Sized, - { - tracing::info!( - target: LOG_TARGET, - ?config, - "start quic transport", - ); - - let (listener, listen_addresses) = - QuicListener::new(&context.keypair, std::mem::take(&mut config.listen_addresses))?; - - Ok(( - Self { - context, - config, - listener, - opened_raw: HashMap::new(), - pending_open: HashMap::new(), - pending_dials: HashMap::new(), - pending_inbound_connections: HashMap::new(), - pending_raw_connections: FuturesUnordered::new(), - pending_connections: FuturesUnordered::new(), - cancel_futures: HashMap::new(), - }, - listen_addresses, - )) - } -} - -impl Transport for QuicTransport { - fn dial(&mut self, connection_id: ConnectionId, address: Multiaddr) -> crate::Result<()> { - let Ok((socket_address, Some(peer))) = QuicListener::get_socket_address(&address) else { - return Err(Error::AddressError(AddressError::PeerIdMissing)); - }; - - let crypto_config = - make_client_config(&self.context.keypair, Some(peer)).expect("to succeed"); - let quic_client_config = QuicClientConfig::try_from(crypto_config) - .map_err(|e| Error::Other(format!("invalid crypto config: {e}")))?; - let mut transport_config = quinn::TransportConfig::default(); - let timeout = - IdleTimeout::try_from(self.config.connection_open_timeout).expect("to succeed"); - transport_config.max_idle_timeout(Some(timeout)); - let mut client_config = ClientConfig::new(Arc::new(quic_client_config)); - client_config.transport_config(Arc::new(transport_config)); - - let client_listen_address = match address.iter().next() { - Some(Protocol::Ip6(_)) => SocketAddr::new(IpAddr::V6(Ipv6Addr::UNSPECIFIED), 0), - Some(Protocol::Ip4(_)) => SocketAddr::new(IpAddr::V4(Ipv4Addr::UNSPECIFIED), 0), - _ => return Err(Error::AddressError(AddressError::InvalidProtocol)), - }; - - let client = Endpoint::client(client_listen_address) - .map_err(|error| Error::Other(error.to_string()))?; - let connection = client - .connect_with(client_config, socket_address, "l") - .map_err(|error| Error::Other(error.to_string()))?; - - tracing::trace!( - target: LOG_TARGET, - ?address, - ?peer, - ?client_listen_address, - "dial peer", - ); - - self.pending_dials.insert(connection_id, address); - - self.pending_connections.push(Box::pin(async move { - let connection = match connection.await { - Ok(connection) => connection, - Err(error) => return (connection_id, Err(DialError::from(error))), - }; - - let Some(peer) = Self::extract_peer_id(&connection) else { - return ( - connection_id, - Err(crate::error::NegotiationError::Quic(QuicError::InvalidCertificate).into()), - ); - }; - - (connection_id, Ok(NegotiatedConnection { peer, connection })) - })); - - Ok(()) - } - - fn accept( - &mut self, - connection_id: ConnectionId, - ) -> crate::Result>> { - let (connection, endpoint) = self - .pending_open - .remove(&connection_id) - .ok_or(Error::ConnectionDoesntExist(connection_id))?; - let bandwidth_sink = self.context.bandwidth_sink.clone(); - let mut protocol_set = self.context.protocol_set(connection_id); - let substream_open_timeout = self.config.substream_open_timeout; - let executor = self.context.executor.clone(); - - tracing::trace!( - target: LOG_TARGET, - ?connection_id, - "start connection", - ); - - let peer = connection.peer; - let endpoint_clone = endpoint.clone(); - - Ok(Box::pin(async move { - // First, notify all protocols about the connection establishment - protocol_set.report_connection_established(peer, endpoint_clone).await?; - - // After protocols are notified, spawn the connection event loop - executor.run(Box::pin(async move { - let _ = QuicConnection::new( - peer, - endpoint, - connection.connection, - protocol_set, - bandwidth_sink, - substream_open_timeout, - ) - .start() - .await; - })); - - Ok(()) - })) - } - - fn reject(&mut self, connection_id: ConnectionId) -> crate::Result<()> { - self.pending_open - .remove(&connection_id) - .map_or(Err(Error::ConnectionDoesntExist(connection_id)), |_| Ok(())) - } - - fn accept_pending(&mut self, connection_id: ConnectionId) -> crate::Result<()> { - let connection = self - .pending_inbound_connections - .remove(&connection_id) - .ok_or(Error::ConnectionDoesntExist(connection_id))?; - - self.on_inbound_connection(connection_id, connection); - - Ok(()) - } - - fn reject_pending(&mut self, connection_id: ConnectionId) -> crate::Result<()> { - self.pending_inbound_connections - .remove(&connection_id) - .map_or(Err(Error::ConnectionDoesntExist(connection_id)), |_| Ok(())) - } - - fn open( - &mut self, - connection_id: ConnectionId, - addresses: Vec, - ) -> crate::Result<()> { - let num_addresses = addresses.len(); - let mut futures: FuturesUnordered<_> = addresses - .into_iter() - .map(|address| { - let keypair = self.context.keypair.clone(); - let connection_open_timeout = self.config.connection_open_timeout; - let addr = address.clone(); - - let future = async move { - let (socket_address, peer) = QuicListener::get_socket_address(&address) - .map_err(DialError::AddressError)?; - let peer = - peer.ok_or_else(|| DialError::AddressError(AddressError::PeerIdMissing))?; - - let crypto_config = - make_client_config(&keypair, Some(peer)).expect("to succeed"); - let quic_client_config = - QuicClientConfig::try_from(crypto_config).expect("valid crypto config"); - let mut transport_config = quinn::TransportConfig::default(); - let timeout = - IdleTimeout::try_from(connection_open_timeout).expect("to succeed"); - transport_config.max_idle_timeout(Some(timeout)); - let mut client_config = ClientConfig::new(Arc::new(quic_client_config)); - client_config.transport_config(Arc::new(transport_config)); - - let client_listen_address = match address.iter().next() { - Some(Protocol::Ip6(_)) => - SocketAddr::new(IpAddr::V6(Ipv6Addr::UNSPECIFIED), 0), - Some(Protocol::Ip4(_)) => - SocketAddr::new(IpAddr::V4(Ipv4Addr::UNSPECIFIED), 0), - _ => return Err(AddressError::InvalidProtocol.into()), - }; - - let client = match Endpoint::client(client_listen_address) { - Ok(client) => client, - Err(error) => { - return Err(DialError::from(error)); - }, - }; - let connection = match client.connect_with(client_config, socket_address, "l") { - Ok(connection) => connection, - Err(error) => return Err(DialError::from(error)), - }; - - let connection = match connection.await { - Ok(connection) => connection, - Err(error) => return Err(DialError::from(error)), - }; - - let Some(peer) = Self::extract_peer_id(&connection) else { - return Err(crate::error::NegotiationError::Quic( - QuicError::InvalidCertificate, - ) - .into()); - }; - - Ok(NegotiatedConnection { peer, connection }) - }; - - async move { future.await.map(|ok| (addr.clone(), ok)).map_err(|err| (addr, err)) } - }) - .collect(); - - // Future that will resolve to the first successful connection. - let future = async move { - let mut errors = Vec::with_capacity(num_addresses); - - while let Some(result) = futures.next().await { - match result { - Ok((address, stream)) => - return RawConnectionResult::Connected { - connection_id, - address, - stream, - errors, - }, - Err(error) => { - tracing::debug!( - target: LOG_TARGET, - ?connection_id, - ?error, - "failed to open connection", - ); - errors.push(error) - }, - } - } - - RawConnectionResult::Failed { connection_id, errors } - }; - - let (fut, handle) = futures::future::abortable(future); - let fut = fut.unwrap_or_else(move |_| RawConnectionResult::Canceled { connection_id }); - self.pending_raw_connections.push(Box::pin(fut)); - self.cancel_futures.insert(connection_id, handle); - - Ok(()) - } - - fn negotiate(&mut self, connection_id: ConnectionId) -> crate::Result<()> { - let (connection, _address) = self - .opened_raw - .remove(&connection_id) - .ok_or(Error::ConnectionDoesntExist(connection_id))?; - - self.pending_connections - .push(Box::pin(async move { (connection_id, Ok(connection)) })); - - Ok(()) - } - - /// Cancel opening connections. - fn cancel(&mut self, connection_id: ConnectionId) { - // Cancel the future if it exists. - // State clean-up happens inside the `poll_next`. - if let Some(handle) = self.cancel_futures.get(&connection_id) { - handle.abort(); - } - } -} - -impl Stream for QuicTransport { - type Item = TransportEvent; - - fn poll_next(mut self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll> { - if let Poll::Ready(Some(connection)) = self.listener.poll_next_unpin(cx) { - let connection_id = self.context.next_connection_id(); - - tracing::trace!( - target: LOG_TARGET, - ?connection_id, - "pending inbound connection", - ); - - self.pending_inbound_connections.insert(connection_id, connection); - - return Poll::Ready(Some(TransportEvent::PendingInboundConnection { connection_id })); - } - - while let Poll::Ready(Some(result)) = self.pending_raw_connections.poll_next_unpin(cx) { - tracing::trace!(target: LOG_TARGET, ?result, "raw connection result"); - - match result { - RawConnectionResult::Connected { connection_id, address, stream, errors } => { - let Some(handle) = self.cancel_futures.remove(&connection_id) else { - tracing::warn!( - target: LOG_TARGET, - ?connection_id, - ?address, - "raw connection without a cancel handle", - ); - continue; - }; - - if !handle.is_aborted() { - self.opened_raw.insert(connection_id, (stream, address.clone())); - - return Poll::Ready(Some(TransportEvent::ConnectionOpened { - connection_id, - address, - errors, - })); - } - }, - - RawConnectionResult::Failed { connection_id, errors } => { - let Some(handle) = self.cancel_futures.remove(&connection_id) else { - tracing::warn!( - target: LOG_TARGET, - ?connection_id, - ?errors, - "raw connection without a cancel handle", - ); - continue; - }; - - if !handle.is_aborted() { - return Poll::Ready(Some(TransportEvent::OpenFailure { - connection_id, - errors, - })); - } - }, - - RawConnectionResult::Canceled { connection_id } => { - if self.cancel_futures.remove(&connection_id).is_none() { - tracing::warn!( - target: LOG_TARGET, - ?connection_id, - "raw cancelled connection without a cancel handle", - ); - } - }, - } - } - - while let Poll::Ready(Some(connection)) = self.pending_connections.poll_next_unpin(cx) { - let (connection_id, result) = connection; - - match self.on_connection_established(connection_id, result) { - Some(event) => return Poll::Ready(Some(event)), - None => {}, - } - } - - Poll::Pending - } -} - -#[cfg(test)] -mod tests { - use super::*; - use crate::{ - codec::ProtocolCodec, - crypto::dilithium::Keypair, - executor::DefaultExecutor, - protocol::SubstreamKeepAlive, - transport::manager::{ProtocolContext, TransportHandle}, - types::protocol::ProtocolName, - BandwidthSink, - }; - use multihash::Multihash; - use tokio::sync::mpsc::channel; - - #[tokio::test] - async fn test_quinn() { - let _ = tracing_subscriber::fmt() - .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) - .try_init(); - - let keypair1 = Keypair::generate(); - let (tx1, _rx1) = channel(64); - let (event_tx1, _event_rx1) = channel(64); - - let handle1 = TransportHandle { - executor: Arc::new(DefaultExecutor {}), - next_substream_id: Default::default(), - next_connection_id: Default::default(), - keypair: keypair1.clone(), - tx: event_tx1, - bandwidth_sink: BandwidthSink::new(), - - protocols: HashMap::from_iter([( - ProtocolName::from("/notif/1"), - ProtocolContext { - tx: tx1, - codec: ProtocolCodec::Identity(32), - fallback_names: Vec::new(), - keep_alive: SubstreamKeepAlive::Yes, - }, - )]), - }; - let resolver = Arc::new(TokioResolver::builder_tokio().unwrap().build()); - - let (mut transport1, listen_addresses) = - QuicTransport::new(handle1, Default::default(), resolver.clone()).unwrap(); - let listen_address = listen_addresses[0].clone(); - - let keypair2 = Keypair::generate(); - let (tx2, _rx2) = channel(64); - let (event_tx2, _event_rx2) = channel(64); - - let handle2 = TransportHandle { - executor: Arc::new(DefaultExecutor {}), - next_substream_id: Default::default(), - next_connection_id: Default::default(), - keypair: keypair2.clone(), - tx: event_tx2, - bandwidth_sink: BandwidthSink::new(), - - protocols: HashMap::from_iter([( - ProtocolName::from("/notif/1"), - ProtocolContext { - tx: tx2, - codec: ProtocolCodec::Identity(32), - fallback_names: Vec::new(), - keep_alive: SubstreamKeepAlive::Yes, - }, - )]), - }; - - let (mut transport2, _) = - QuicTransport::new(handle2, Default::default(), resolver).unwrap(); - let peer1: PeerId = PeerId::from_public_key(&keypair1.public().into()); - let _peer2: PeerId = PeerId::from_public_key(&keypair2.public().into()); - let listen_address = - listen_address.with(Protocol::P2p(Multihash::from_bytes(&peer1.to_bytes()).unwrap())); - - transport2.dial(ConnectionId::new(), listen_address).unwrap(); - - let event = transport1.next().await.unwrap(); - match event { - TransportEvent::PendingInboundConnection { connection_id } => { - transport1.accept_pending(connection_id).unwrap(); - }, - _ => panic!("unexpected event"), - } - - let (res1, res2) = tokio::join!(transport1.next(), transport2.next()); - - assert!(std::matches!(res1, Some(TransportEvent::ConnectionEstablished { .. }))); - assert!(std::matches!(res2, Some(TransportEvent::ConnectionEstablished { .. }))); - } -} diff --git a/client/litep2p/src/transport/quic/substream.rs b/client/litep2p/src/transport/quic/substream.rs deleted file mode 100644 index 54e570fb..00000000 --- a/client/litep2p/src/transport/quic/substream.rs +++ /dev/null @@ -1,169 +0,0 @@ -// Copyright 2023 litep2p developers -// -// Permission is hereby granted, free of charge, to any person obtaining a -// copy of this software and associated documentation files (the "Software"), -// to deal in the Software without restriction, including without limitation -// the rights to use, copy, modify, merge, publish, distribute, sublicense, -// and/or sell copies of the Software, and to permit persons to whom the -// Software is furnished to do so, subject to the following conditions: -// -// The above copyright notice and this permission notice shall be included in -// all copies or substantial portions of the Software. -// -// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS -// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, -// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE -// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER -// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING -// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER -// DEALINGS IN THE SOFTWARE. - -use crate::{error::SubstreamError, BandwidthSink}; - -use bytes::Bytes; -use futures::{AsyncRead, AsyncWrite}; -use quinn::{RecvStream, SendStream}; -use tokio::io::{AsyncRead as TokioAsyncRead, AsyncWrite as TokioAsyncWrite}; -use tokio_util::compat::{Compat, TokioAsyncReadCompatExt, TokioAsyncWriteCompatExt}; - -use std::{ - io, - pin::Pin, - task::{Context, Poll}, -}; - -use crate::protocol::Permit; - -/// QUIC substream. -#[derive(Debug)] -pub struct Substream { - _lifetime_permit: Option, - bandwidth_sink: BandwidthSink, - send_stream: SendStream, - recv_stream: RecvStream, -} - -impl Substream { - /// Create new [`Substream`]. - pub fn new( - _lifetime_permit: Option, - send_stream: SendStream, - recv_stream: RecvStream, - bandwidth_sink: BandwidthSink, - ) -> Self { - Self { _lifetime_permit, send_stream, recv_stream, bandwidth_sink } - } - - /// Write `buffers` to the underlying socket. - pub async fn write_all_chunks(&mut self, buffers: &mut [Bytes]) -> Result<(), SubstreamError> { - let nwritten = buffers.iter().fold(0usize, |acc, buffer| acc + buffer.len()); - - match self - .send_stream - .write_all_chunks(buffers) - .await - .map_err(|_| SubstreamError::ConnectionClosed) - { - Ok(()) => { - self.bandwidth_sink.increase_outbound(nwritten); - Ok(()) - }, - Err(error) => Err(error), - } - } -} - -impl TokioAsyncRead for Substream { - fn poll_read( - mut self: Pin<&mut Self>, - cx: &mut Context<'_>, - buf: &mut tokio::io::ReadBuf<'_>, - ) -> Poll> { - match futures::ready!(Pin::new(&mut self.recv_stream).poll_read(cx, buf)) { - Err(error) => Poll::Ready(Err(error)), - Ok(res) => { - self.bandwidth_sink.increase_inbound(buf.filled().len()); - Poll::Ready(Ok(res)) - }, - } - } -} - -impl TokioAsyncWrite for Substream { - fn poll_write( - mut self: Pin<&mut Self>, - cx: &mut Context<'_>, - buf: &[u8], - ) -> Poll> { - match futures::ready!(Pin::new(&mut self.send_stream).poll_write(cx, buf)) { - Err(error) => Poll::Ready(Err(error.into())), - Ok(nwritten) => { - self.bandwidth_sink.increase_outbound(nwritten); - Poll::Ready(Ok(nwritten)) - }, - } - } - - fn poll_flush(mut self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll> { - Pin::new(&mut self.send_stream).poll_flush(cx).map_err(Into::into) - } - - fn poll_shutdown( - mut self: Pin<&mut Self>, - cx: &mut Context<'_>, - ) -> Poll> { - Pin::new(&mut self.send_stream).poll_shutdown(cx).map_err(Into::into) - } -} - -/// Substream pair used to negotiate a protocol for the connection. -pub struct NegotiatingSubstream { - recv_stream: Compat, - send_stream: Compat, -} - -impl NegotiatingSubstream { - /// Create new [`NegotiatingSubstream`]. - pub fn new(send_stream: SendStream, recv_stream: RecvStream) -> Self { - Self { - recv_stream: TokioAsyncReadCompatExt::compat(recv_stream), - send_stream: TokioAsyncWriteCompatExt::compat_write(send_stream), - } - } - - /// Deconstruct [`NegotiatingSubstream`] into parts. - pub fn into_parts(self) -> (SendStream, RecvStream) { - let sender = self.send_stream.into_inner(); - let receiver = self.recv_stream.into_inner(); - - (sender, receiver) - } -} - -impl AsyncRead for NegotiatingSubstream { - fn poll_read( - mut self: Pin<&mut Self>, - cx: &mut Context<'_>, - buf: &mut [u8], - ) -> Poll> { - Pin::new(&mut self.recv_stream).poll_read(cx, buf) - } -} - -impl AsyncWrite for NegotiatingSubstream { - fn poll_write( - mut self: Pin<&mut Self>, - cx: &mut Context<'_>, - buf: &[u8], - ) -> Poll> { - Pin::new(&mut self.send_stream).poll_write(cx, buf) - } - - fn poll_flush(mut self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll> { - Pin::new(&mut self.send_stream).poll_flush(cx) - } - - fn poll_close(mut self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll> { - Pin::new(&mut self.send_stream).poll_close(cx) - } -} diff --git a/client/litep2p/src/transport/s2n-quic/config.rs b/client/litep2p/src/transport/s2n-quic/config.rs deleted file mode 100644 index dd3808c8..00000000 --- a/client/litep2p/src/transport/s2n-quic/config.rs +++ /dev/null @@ -1,30 +0,0 @@ -// Copyright 2023 litep2p developers -// -// Permission is hereby granted, free of charge, to any person obtaining a -// copy of this software and associated documentation files (the "Software"), -// to deal in the Software without restriction, including without limitation -// the rights to use, copy, modify, merge, publish, distribute, sublicense, -// and/or sell copies of the Software, and to permit persons to whom the -// Software is furnished to do so, subject to the following conditions: -// -// The above copyright notice and this permission notice shall be included in -// all copies or substantial portions of the Software. -// -// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS -// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, -// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE -// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER -// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING -// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER -// DEALINGS IN THE SOFTWARE. - -//! QUIC transport configuration. - -use multiaddr::Multiaddr; - -/// QUIC transport configuration. -#[derive(Debug, Clone)] -pub struct Config { - /// Listen address address for the transport. - pub listen_address: Multiaddr, -} diff --git a/client/litep2p/src/transport/s2n-quic/connection.rs b/client/litep2p/src/transport/s2n-quic/connection.rs deleted file mode 100644 index a556ab0c..00000000 --- a/client/litep2p/src/transport/s2n-quic/connection.rs +++ /dev/null @@ -1,743 +0,0 @@ -// Copyright 2023 litep2p developers -// -// Permission is hereby granted, free of charge, to any person obtaining a -// copy of this software and associated documentation files (the "Software"), -// to deal in the Software without restriction, including without limitation -// the rights to use, copy, modify, merge, publish, distribute, sublicense, -// and/or sell copies of the Software, and to permit persons to whom the -// Software is furnished to do so, subject to the following conditions: -// -// The above copyright notice and this permission notice shall be included in -// all copies or substantial portions of the Software. -// -// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS -// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, -// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE -// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER -// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING -// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER -// DEALINGS IN THE SOFTWARE. - -use crate::{ - codec::{ - generic::Unspecified, identity::Identity, unsigned_varint::UnsignedVarint, ProtocolCodec, - }, - config::Role, - error::Error, - multistream_select::{dialer_select_proto, listener_select_proto, Negotiated, Version}, - protocol::{Direction, Permit, ProtocolCommand, ProtocolSet}, - substream::Substream as SubstreamT, - transport::substream::Substream, - types::{protocol::ProtocolName, ConnectionId, SubstreamId}, - PeerId, -}; - -use futures::{future::BoxFuture, stream::FuturesUnordered, AsyncRead, AsyncWrite, StreamExt}; -use s2n_quic::{ - connection::{Connection, Handle}, - stream::BidirectionalStream, -}; -use tokio_util::codec::Framed; - -/// Logging target for the file. -const LOG_TARGET: &str = "litep2p::quic::connection"; - -/// QUIC connection error. -#[derive(Debug)] -enum ConnectionError { - /// Timeout - Timeout { - /// Protocol. - protocol: Option, - - /// Substream ID. - substream_id: Option, - }, - - /// Failed to negotiate connection/substream. - FailedToNegotiate { - /// Protocol. - protocol: Option, - - /// Substream ID. - substream_id: Option, - - /// Error. - error: Error, - }, -} - -/// QUIC connection. -pub(crate) struct QuicConnection { - /// Inner QUIC connection. - connection: Connection, - - /// Remote peer ID. - peer: PeerId, - - /// Connection ID. - connection_id: ConnectionId, - - /// Transport context. - protocol_set: ProtocolSet, - - /// Pending substreams. - pending_substreams: - FuturesUnordered>>, -} - -#[derive(Debug)] -pub struct NegotiatedSubstream { - /// Substream direction. - direction: Direction, - - /// Protocol name. - protocol: ProtocolName, - - /// `s2n-quic` stream. - io: BidirectionalStream, - - /// Permit. - permit: Permit, -} - -impl QuicConnection { - /// Create new [`QuiConnection`]. - pub(crate) fn new( - peer: PeerId, - protocol_set: ProtocolSet, - connection: Connection, - connection_id: ConnectionId, - ) -> Self { - Self { - peer, - connection, - connection_id, - pending_substreams: FuturesUnordered::new(), - protocol_set, - } - } - - /// Negotiate protocol. - async fn negotiate_protocol( - stream: S, - role: &Role, - protocols: Vec<&str>, - ) -> crate::Result<(Negotiated, ProtocolName)> { - tracing::trace!(target: LOG_TARGET, ?protocols, "negotiating protocols"); - - let (protocol, socket) = match role { - Role::Dialer => dialer_select_proto(stream, protocols, Version::V1).await?, - Role::Listener => listener_select_proto(stream, protocols).await?, - }; - - tracing::trace!(target: LOG_TARGET, ?protocol, "protocol negotiated"); - - Ok((socket, ProtocolName::from(protocol.to_string()))) - } - - /// Open substream for `protocol`. - pub async fn open_substream( - mut handle: Handle, - permit: Permit, - direction: Direction, - protocol: ProtocolName, - fallback_names: Vec, - ) -> crate::Result { - tracing::debug!(target: LOG_TARGET, ?protocol, ?direction, "open substream"); - - let stream = match handle.open_bidirectional_stream().await { - Ok(stream) => { - tracing::trace!( - target: LOG_TARGET, - ?protocol, - ?direction, - id = ?stream.id(), - "substream opened" - ); - stream - } - Err(error) => { - tracing::debug!( - target: LOG_TARGET, - ?direction, - ?error, - "failed to open substream" - ); - return Err(Error::Unknown); - } - }; - - // TODO: https://github.com/paritytech/litep2p/issues/346 protocols don't change after - // they've been initialized so this should be done only once. - let protocols = std::iter::once(&*protocol) - .chain(fallback_names.iter().map(|protocol| &**protocol)) - .collect(); - - let (io, protocol) = Self::negotiate_protocol(stream, &Role::Dialer, protocols).await?; - - Ok(NegotiatedSubstream { - io: io.inner(), - direction, - permit, - protocol, - }) - } - - /// Accept substream. - pub async fn accept_substream( - stream: BidirectionalStream, - permit: Permit, - substream_id: SubstreamId, - protocols: Vec, - ) -> crate::Result { - tracing::trace!( - target: LOG_TARGET, - ?substream_id, - quic_id = ?stream.id(), - "accept inbound substream" - ); - - let protocols = protocols.iter().map(|protocol| &**protocol).collect::>(); - let (io, protocol) = Self::negotiate_protocol(stream, &Role::Listener, protocols).await?; - - tracing::trace!( - target: LOG_TARGET, - ?substream_id, - ?protocol, - "substream accepted and negotiated" - ); - - Ok(NegotiatedSubstream { - io: io.inner(), - direction: Direction::Inbound, - protocol, - permit, - }) - } - - /// Start [`QuicConnection`] event loop. - pub(crate) async fn start(mut self) -> crate::Result<()> { - tracing::debug!(target: LOG_TARGET, "starting quic connection handler"); - - loop { - tokio::select! { - substream = self.connection.accept_bidirectional_stream() => match substream { - Ok(Some(stream)) => { - let substream = self.protocol_set.next_substream_id(); - let protocols = self.protocol_set.protocols(); - let permit = self.protocol_set.try_get_permit().ok_or(Error::ConnectionClosed)?; - - self.pending_substreams.push(Box::pin(async move { - match tokio::time::timeout( - std::time::Duration::from_secs(5), // TODO: https://github.com/paritytech/litep2p/issues/348 make this configurable - Self::accept_substream(stream, permit, substream, protocols), - ) - .await - { - Ok(Ok(substream)) => Ok(substream), - Ok(Err(error)) => Err(ConnectionError::FailedToNegotiate { - protocol: None, - substream_id: None, - error, - }), - Err(_) => Err(ConnectionError::Timeout { - protocol: None, - substream_id: None - }), - } - })); - } - Ok(None) => { - tracing::debug!(target: LOG_TARGET, peer = ?self.peer, "connection closed"); - self.protocol_set.report_connection_closed(self.peer, self.connection_id).await?; - - return Ok(()) - } - Err(error) => { - tracing::debug!( - target: LOG_TARGET, - peer = ?self.peer, - ?error, - "connection closed with error" - ); - self.protocol_set.report_connection_closed(self.peer, self.connection_id).await?; - - return Ok(()) - } - }, - substream = self.pending_substreams.select_next_some(), if !self.pending_substreams.is_empty() => { - match substream { - Err(error) => { - tracing::debug!( - target: LOG_TARGET, - ?error, - "failed to accept/open substream", - ); - - let (protocol, substream_id, error) = match error { - ConnectionError::Timeout { protocol, substream_id } => { - (protocol, substream_id, Error::Timeout) - } - ConnectionError::FailedToNegotiate { protocol, substream_id, error } => { - (protocol, substream_id, error) - } - }; - - if let (Some(protocol), Some(substream_id)) = (protocol, substream_id) { - if let Err(error) = self.protocol_set - .report_substream_open_failure(protocol, substream_id, error) - .await - { - tracing::error!( - target: LOG_TARGET, - ?error, - "failed to register opened substream to protocol" - ); - } - } - } - Ok(substream) => { - let protocol = substream.protocol.clone(); - let direction = substream.direction; - let substream = Substream::new(substream.io, substream.permit); - let substream: Box = match self.protocol_set.protocol_codec(&protocol) { - ProtocolCodec::Identity(payload_size) => { - Box::new(Framed::new(substream, Identity::new(payload_size))) - } - ProtocolCodec::UnsignedVarint(max_size) => { - Box::new(Framed::new(substream, UnsignedVarint::new(max_size))) - } - ProtocolCodec::Unspecified => { - Box::new(Framed::new(substream, Generic::new())) - } - }; - - if let Err(error) = self.protocol_set - .report_substream_open(self.peer, protocol, direction, substream) - .await - { - tracing::error!( - target: LOG_TARGET, - ?error, - "failed to register opened substream to protocol" - ); - } - } - } - } - protocol = self.protocol_set.next_event() => match protocol { - Some(ProtocolCommand::OpenSubstream { protocol, fallback_names, substream_id, permit, .. }) => { - let handle = self.connection.handle(); - - tracing::trace!( - target: LOG_TARGET, - ?protocol, - ?fallback_names, - ?substream_id, - "open substream" - ); - - self.pending_substreams.push(Box::pin(async move { - match tokio::time::timeout( - std::time::Duration::from_secs(5), // TODO: https://github.com/paritytech/litep2p/issues/348 make this configurable - Self::open_substream( - handle, - permit, - Direction::Outbound(substream_id), - protocol.clone(), - fallback_names - ), - ) - .await - { - Ok(Ok(substream)) => Ok(substream), - Ok(Err(error)) => Err(ConnectionError::FailedToNegotiate { - protocol: Some(protocol), - substream_id: Some(substream_id), - error, - }), - Err(_) => Err(ConnectionError::Timeout { - protocol: Some(protocol), - substream_id: Some(substream_id) - }), - } - })); - } - None => { - tracing::debug!(target: LOG_TARGET, "protocols have exited, shutting down connection"); - return self.protocol_set.report_connection_closed(self.peer, self.connection_id).await - } - } - } - } - } -} - -#[cfg(test)] -mod tests { - use super::*; - use crate::{ - crypto::{ - dilithium::Keypair, - tls::{certificate::generate, TlsProvider}, - PublicKey, - }, - protocol::{Transport, TransportEvent}, - transport::manager::{SupportedTransport, TransportManager, TransportManagerEvent}, - }; - use multiaddr::Multiaddr; - use s2n_quic::{client::Connect, Client, Server}; - use tokio::sync::mpsc::{channel, Receiver}; - - // context for testing - struct QuicContext { - manager: TransportManager, - peer: PeerId, - server: Server, - client: Client, - rx: Receiver, - connect: Connect, - } - - // prepare quic context for testing - fn prepare_quic_context() -> QuicContext { - let keypair = Keypair::generate(); - let (certificate, key) = generate(&keypair).unwrap(); - let (tx, rx) = channel(1); - let peer = PeerId::from_public_key(&PublicKey::from(keypair.public())); - - let provider = TlsProvider::new(key, certificate, None, Some(tx.clone())); - let server = Server::builder() - .with_tls(provider) - .expect("TLS provider to be enabled successfully") - .with_io("127.0.0.1:0") - .unwrap() - .start() - .unwrap(); - let listen_address = server.local_addr().unwrap(); - - let keypair = Keypair::generate(); - let (certificate, key) = generate(&keypair).unwrap(); - let provider = TlsProvider::new(key, certificate, Some(peer), None); - - let client = Client::builder() - .with_tls(provider) - .expect("TLS provider to be enabled successfully") - .with_io("0.0.0.0:0") - .unwrap() - .start() - .unwrap(); - - let connect = Connect::new(listen_address).with_server_name("localhost"); - let (manager, _handle) = TransportManager::new(keypair.clone()); - - QuicContext { - manager, - peer, - server, - client, - connect, - rx, - } - } - - #[tokio::test] - async fn connection_closed() { - let QuicContext { - mut manager, - mut server, - peer, - client, - connect, - rx: _rx, - } = prepare_quic_context(); - - let res = tokio::join!(server.accept(), client.connect(connect)); - let (Some(connection1), Ok(connection2)) = res else { - panic!("failed to establish connection"); - }; - - let mut service1 = manager.register_protocol( - ProtocolName::from("/notif/1"), - Vec::new(), - ProtocolCodec::UnsignedVarint(None), - ); - let mut service2 = manager.register_protocol( - ProtocolName::from("/notif/2"), - Vec::new(), - ProtocolCodec::UnsignedVarint(None), - ); - let transport_handle = manager.register_transport(SupportedTransport::Quic); - let mut protocol_set = transport_handle.protocol_set(); - protocol_set - .report_connection_established(ConnectionId::from(0usize), peer, Multiaddr::empty()) - .await - .unwrap(); - - // ignore connection established events - let _ = service1.next_event().await.unwrap(); - let _ = service2.next_event().await.unwrap(); - let _ = manager.next().await.unwrap(); - - tokio::spawn(async move { - let _ = - QuicConnection::new(peer, protocol_set, connection1, ConnectionId::from(0usize)) - .start() - .await; - }); - - // drop connection and verify that both protocols are notified of it - drop(connection2); - - let ( - Some(TransportEvent::ConnectionClosed { .. }), - Some(TransportEvent::ConnectionClosed { .. }), - ) = tokio::join!(service1.next_event(), service2.next_event()) - else { - panic!("invalid event received"); - }; - - // verify that the `TransportManager` is also notified about the closed connection - let Some(TransportManagerEvent::ConnectionClosed { .. }) = manager.next().await else { - panic!("invalid event received"); - }; - } - - #[tokio::test] - async fn outbound_substream_timeouts() { - let QuicContext { - mut manager, - mut server, - peer, - client, - connect, - rx: _rx, - } = prepare_quic_context(); - - let res = tokio::join!(server.accept(), client.connect(connect)); - let (Some(connection1), Ok(_connection2)) = res else { - panic!("failed to establish connection"); - }; - - let mut service1 = manager.register_protocol( - ProtocolName::from("/notif/1"), - Vec::new(), - ProtocolCodec::UnsignedVarint(None), - ); - let mut service2 = manager.register_protocol( - ProtocolName::from("/notif/2"), - Vec::new(), - ProtocolCodec::UnsignedVarint(None), - ); - let transport_handle = manager.register_transport(SupportedTransport::Quic); - let mut protocol_set = transport_handle.protocol_set(); - protocol_set - .report_connection_established(ConnectionId::from(0usize), peer, Multiaddr::empty()) - .await - .unwrap(); - - // ignore connection established events - let _ = service1.next_event().await.unwrap(); - let _ = service2.next_event().await.unwrap(); - let _ = manager.next().await.unwrap(); - - tokio::spawn(async move { - let _ = - QuicConnection::new(peer, protocol_set, connection1, ConnectionId::from(0usize)) - .start() - .await; - }); - - let _ = service1.open_substream(peer).await.unwrap(); - - let Some(TransportEvent::SubstreamOpenFailure { .. }) = service1.next_event().await else { - panic!("invalid event received"); - }; - } - - #[tokio::test] - async fn outbound_substream_protocol_not_supported() { - let _ = tracing_subscriber::fmt() - .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) - .try_init(); - - let QuicContext { - mut manager, - mut server, - peer, - client, - connect, - rx: _rx, - } = prepare_quic_context(); - - let res = tokio::join!(server.accept(), client.connect(connect)); - let (Some(connection1), Ok(mut connection2)) = res else { - panic!("failed to establish connection"); - }; - - let mut service1 = manager.register_protocol( - ProtocolName::from("/notif/1"), - Vec::new(), - ProtocolCodec::UnsignedVarint(None), - ); - let mut service2 = manager.register_protocol( - ProtocolName::from("/notif/2"), - Vec::new(), - ProtocolCodec::UnsignedVarint(None), - ); - let transport_handle = manager.register_transport(SupportedTransport::Quic); - let mut protocol_set = transport_handle.protocol_set(); - protocol_set - .report_connection_established(ConnectionId::from(0usize), peer, Multiaddr::empty()) - .await - .unwrap(); - - // ignore connection established events - let _ = service1.next_event().await.unwrap(); - let _ = service2.next_event().await.unwrap(); - let _ = manager.next().await.unwrap(); - - tokio::spawn(async move { - let _ = - QuicConnection::new(peer, protocol_set, connection1, ConnectionId::from(0usize)) - .start() - .await; - }); - - let _ = service1.open_substream(peer).await.unwrap(); - - let stream = connection2.accept_bidirectional_stream().await.unwrap().unwrap(); - - assert!( - listener_select_proto(stream, vec!["/unsupported/1", "/unsupported/2"]) - .await - .is_err() - ); - - let Some(TransportEvent::SubstreamOpenFailure { .. }) = service1.next_event().await else { - panic!("invalid event received"); - }; - } - - #[tokio::test] - async fn connection_closed_while_negotiating_protocol() { - let _ = tracing_subscriber::fmt() - .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) - .try_init(); - - let QuicContext { - mut manager, - mut server, - peer, - client, - connect, - rx: _rx, - } = prepare_quic_context(); - - let res = tokio::join!(server.accept(), client.connect(connect)); - let (Some(connection1), Ok(mut connection2)) = res else { - panic!("failed to establish connection"); - }; - - let mut service1 = manager.register_protocol( - ProtocolName::from("/notif/1"), - Vec::new(), - ProtocolCodec::UnsignedVarint(None), - ); - let mut service2 = manager.register_protocol( - ProtocolName::from("/notif/2"), - Vec::new(), - ProtocolCodec::UnsignedVarint(None), - ); - let transport_handle = manager.register_transport(SupportedTransport::Quic); - let mut protocol_set = transport_handle.protocol_set(); - protocol_set - .report_connection_established(ConnectionId::from(0usize), peer, Multiaddr::empty()) - .await - .unwrap(); - - // ignore connection established events - let _ = service1.next_event().await.unwrap(); - let _ = service2.next_event().await.unwrap(); - let _ = manager.next().await.unwrap(); - - tokio::spawn(async move { - let _ = - QuicConnection::new(peer, protocol_set, connection1, ConnectionId::from(0usize)) - .start() - .await; - }); - - let _ = service1.open_substream(peer).await.unwrap(); - let stream = connection2.accept_bidirectional_stream().await.unwrap().unwrap(); - - drop(stream); - drop(connection2); - - let Some(TransportEvent::SubstreamOpenFailure { .. }) = service1.next_event().await else { - panic!("invalid event received"); - }; - } - - #[tokio::test] - async fn outbound_substream_opened_and_negotiated() { - let _ = tracing_subscriber::fmt() - .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) - .try_init(); - - let QuicContext { - mut manager, - mut server, - peer, - client, - connect, - rx: _rx, - } = prepare_quic_context(); - - let res = tokio::join!(server.accept(), client.connect(connect)); - let (Some(connection1), Ok(mut connection2)) = res else { - panic!("failed to establish connection"); - }; - - let mut service1 = manager.register_protocol( - ProtocolName::from("/notif/1"), - Vec::new(), - ProtocolCodec::UnsignedVarint(None), - ); - let mut service2 = manager.register_protocol( - ProtocolName::from("/notif/2"), - Vec::new(), - ProtocolCodec::UnsignedVarint(None), - ); - let transport_handle = manager.register_transport(SupportedTransport::Quic); - let mut protocol_set = transport_handle.protocol_set(); - protocol_set - .report_connection_established(ConnectionId::from(0usize), peer, Multiaddr::empty()) - .await - .unwrap(); - - // ignore connection established events - let _ = service1.next_event().await.unwrap(); - let _ = service2.next_event().await.unwrap(); - let _ = manager.next().await.unwrap(); - - tokio::spawn(async move { - let _ = - QuicConnection::new(peer, protocol_set, connection1, ConnectionId::from(0usize)) - .start() - .await; - }); - - let _ = service1.open_substream(peer).await.unwrap(); - - let stream = connection2.accept_bidirectional_stream().await.unwrap().unwrap(); - - let (_io, _proto) = - listener_select_proto(stream, vec!["/notif/1", "/notif/2"]).await.unwrap(); - - let Some(TransportEvent::SubstreamOpened { .. }) = service1.next_event().await else { - panic!("invalid event received"); - }; - } -} diff --git a/client/litep2p/src/transport/s2n-quic/mod.rs b/client/litep2p/src/transport/s2n-quic/mod.rs deleted file mode 100644 index 606a3aa7..00000000 --- a/client/litep2p/src/transport/s2n-quic/mod.rs +++ /dev/null @@ -1,593 +0,0 @@ -// Copyright 2023 litep2p developers -// -// Permission is hereby granted, free of charge, to any person obtaining a -// copy of this software and associated documentation files (the "Software"), -// to deal in the Software without restriction, including without limitation -// the rights to use, copy, modify, merge, publish, distribute, sublicense, -// and/or sell copies of the Software, and to permit persons to whom the -// Software is furnished to do so, subject to the following conditions: -// -// The above copyright notice and this permission notice shall be included in -// all copies or substantial portions of the Software. -// -// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS -// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, -// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE -// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER -// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING -// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER -// DEALINGS IN THE SOFTWARE. - -//! QUIC transport. - -use crate::{ - crypto::tls::{certificate::generate, TlsProvider}, - error::{AddressError, Error}, - transport::{ - manager::{TransportHandle, TransportManagerCommand}, - quic::{config::Config, connection::QuicConnection}, - Transport, - }, - types::ConnectionId, - PeerId, -}; - -use futures::{future::BoxFuture, stream::FuturesUnordered, StreamExt}; -use multiaddr::{Multiaddr, Protocol}; -use multihash::Multihash; -use s2n_quic::{ - client::Connect, - connection::{Connection, Error as ConnectionError}, - Client, Server, -}; -use tokio::sync::mpsc::{channel, Receiver, Sender}; - -use std::{ - collections::HashMap, - net::{IpAddr, Ipv4Addr, Ipv6Addr, SocketAddr}, -}; - -mod connection; - -pub mod config; - -/// Logging target for the file. -const LOG_TARGET: &str = "litep2p::quic"; - -/// Convert `SocketAddr` to `Multiaddr` -fn socket_addr_to_multi_addr(address: &SocketAddr) -> Multiaddr { - let mut multiaddr = Multiaddr::from(address.ip()); - multiaddr.push(Protocol::Udp(address.port())); - multiaddr.push(Protocol::QuicV1); - - multiaddr -} - -/// QUIC transport object. -#[derive(Debug)] -pub(crate) struct QuicTransport { - /// QUIC server. - server: Server, - - /// Transport context. - context: TransportHandle, - - /// Assigned listen address. - listen_address: SocketAddr, - - /// Listen address assigned for clients. - client_listen_address: SocketAddr, - - /// Pending dials. - pending_dials: HashMap, - - /// Pending connections. - pending_connections: FuturesUnordered< - BoxFuture<'static, (ConnectionId, PeerId, Result)>, - >, - - /// RX channel for receiving the client `PeerId`. - rx: Receiver, - - /// TX channel for send the client `PeerId` to server. - _tx: Sender, -} - -impl QuicTransport { - /// Extract socket address and `PeerId`, if found, from `address`. - fn get_socket_address(address: &Multiaddr) -> crate::Result<(SocketAddr, Option)> { - tracing::trace!(target: LOG_TARGET, ?address, "parse multi address"); - - let mut iter = address.iter(); - let socket_address = match iter.next() { - Some(Protocol::Ip6(address)) => match iter.next() { - Some(Protocol::Udp(port)) => SocketAddr::new(IpAddr::V6(address), port), - protocol => { - tracing::error!( - target: LOG_TARGET, - ?protocol, - "invalid transport protocol, expected `QuicV1`", - ); - return Err(Error::AddressError(AddressError::InvalidProtocol)); - } - }, - Some(Protocol::Ip4(address)) => match iter.next() { - Some(Protocol::Udp(port)) => SocketAddr::new(IpAddr::V4(address), port), - protocol => { - tracing::error!( - target: LOG_TARGET, - ?protocol, - "invalid transport protocol, expected `QuicV1`", - ); - return Err(Error::AddressError(AddressError::InvalidProtocol)); - } - }, - protocol => { - tracing::error!(target: LOG_TARGET, ?protocol, "invalid transport protocol"); - return Err(Error::AddressError(AddressError::InvalidProtocol)); - } - }; - - // verify that quic exists - match iter.next() { - Some(Protocol::QuicV1) => {} - _ => return Err(Error::AddressError(AddressError::InvalidProtocol)), - } - - let maybe_peer = match iter.next() { - Some(Protocol::P2p(multihash)) => Some(PeerId::from_multihash(multihash)?), - None => None, - protocol => { - tracing::error!( - target: LOG_TARGET, - ?protocol, - "invalid protocol, expected `P2p` or `None`" - ); - return Err(Error::AddressError(AddressError::InvalidProtocol)); - } - }; - - Ok((socket_address, maybe_peer)) - } - - /// Accept QUIC conenction. - async fn accept_connection(&mut self, connection: Connection) -> crate::Result<()> { - let connection_id = self.context.next_connection_id(); - let address = socket_addr_to_multi_addr( - &connection.remote_addr().expect("remote address to be known"), - ); - - let Ok(peer) = self.rx.try_recv() else { - tracing::error!(target: LOG_TARGET, "failed to receive client `PeerId` from tls verifier"); - return Ok(()); - }; - - tracing::info!(target: LOG_TARGET, ?address, ?peer, "accepted connection from remote peer"); - - // TODO: https://github.com/paritytech/litep2p/issues/349 verify that the peer can actually be accepted - let mut protocol_set = self.context.protocol_set(); - protocol_set.report_connection_established(connection_id, peer, address).await?; - - tokio::spawn(async move { - let quic_connection = - QuicConnection::new(peer, protocol_set, connection, connection_id); - - if let Err(error) = quic_connection.start().await { - tracing::debug!(target: LOG_TARGET, ?error, "quic connection exited with an error"); - } - }); - - Ok(()) - } - - /// Handle established connection. - async fn on_connection_established( - &mut self, - peer: PeerId, - connection_id: ConnectionId, - result: Result, - ) -> crate::Result<()> { - match result { - Ok(connection) => { - let address = match self.pending_dials.remove(&connection_id) { - Some(address) => address, - None => { - let address = connection - .remote_addr() - .map_err(|_| Error::AddressError(AddressError::AddressNotAvailable))?; - - Multiaddr::empty() - .with(Protocol::from(address.ip())) - .with(Protocol::Udp(address.port())) - .with(Protocol::QuicV1) - .with(Protocol::P2p( - Multihash::from_bytes(&peer.to_bytes()).unwrap(), - )) - } - }; - - let mut protocol_set = self.context.protocol_set(); - protocol_set.report_connection_established(connection_id, peer, address).await?; - - tokio::spawn(async move { - let quic_connection = - QuicConnection::new(peer, protocol_set, connection, connection_id); - if let Err(error) = quic_connection.start().await { - tracing::debug!(target: LOG_TARGET, ?error, "quic connection exited with an error"); - } - }); - - Ok(()) - } - Err(error) => match self.pending_dials.remove(&connection_id) { - Some(address) => { - let error = if std::matches!( - error, - ConnectionError::MaxHandshakeDurationExceeded { .. } - ) { - Error::Timeout - } else { - Error::TransportError(error.to_string()) - }; - - self.context.report_dial_failure(connection_id, address, error).await; - Ok(()) - } - None => { - tracing::debug!( - target: LOG_TARGET, - ?error, - "failed to establish connection" - ); - Ok(()) - } - }, - } - } - - /// Dial remote peer. - async fn on_dial_peer( - &mut self, - address: Multiaddr, - connection: ConnectionId, - ) -> crate::Result<()> { - tracing::debug!(target: LOG_TARGET, ?address, "open connection"); - - let Ok((socket_address, Some(peer))) = Self::get_socket_address(&address) else { - return Err(Error::AddressError(AddressError::PeerIdMissing)); - }; - - let (certificate, key) = generate(&self.context.keypair).unwrap(); - let provider = TlsProvider::new(key, certificate, Some(peer), None); - - let client = Client::builder() - .with_tls(provider) - .expect("TLS provider to be enabled successfully") - .with_io(self.client_listen_address)? - .start()?; - - let connect = Connect::new(socket_address).with_server_name("localhost"); - - self.pending_dials.insert(connection, address); - self.pending_connections.push(Box::pin(async move { - (connection, peer, client.connect(connect).await) - })); - - Ok(()) - } -} - -#[async_trait::async_trait] -impl Transport for QuicTransport { - type Config = Config; - - /// Create new [`QuicTransport`] object. - async fn new(context: TransportHandle, config: Self::Config) -> crate::Result - where - Self: Sized, - { - tracing::info!( - target: LOG_TARGET, - listen_address = ?config.listen_address, - "start quic transport", - ); - - let (listen_address, _) = Self::get_socket_address(&config.listen_address)?; - let (certificate, key) = generate(&context.keypair)?; - let (_tx, rx) = channel(1); - - let provider = TlsProvider::new(key, certificate, None, Some(_tx.clone())); - let server = Server::builder() - .with_tls(provider) - .expect("TLS provider to be enabled successfully") - .with_io(listen_address)? - .start()?; - - let listen_address = server.local_addr()?; - let client_listen_address = match listen_address.ip() { - std::net::IpAddr::V4(_) => SocketAddr::new(IpAddr::V4(Ipv4Addr::UNSPECIFIED), 0), - std::net::IpAddr::V6(_) => SocketAddr::new(IpAddr::V6(Ipv6Addr::UNSPECIFIED), 0), - }; - - Ok(Self { - rx, - _tx, - server, - context, - listen_address, - client_listen_address, - pending_dials: HashMap::new(), - pending_connections: FuturesUnordered::new(), - }) - } - - /// Get assigned listen address. - fn listen_address(&self) -> Multiaddr { - socket_addr_to_multi_addr(&self.listen_address) - } - - /// Start [`QuicTransport`] event loop. - async fn start(mut self) -> crate::Result<()> { - loop { - tokio::select! { - connection = self.server.accept() => match connection { - Some(connection) => if let Err(error) = self.accept_connection(connection).await { - tracing::error!(target: LOG_TARGET, ?error, "failed to accept quic connection"); - return Err(error); - }, - None => { - tracing::error!(target: LOG_TARGET, "failed to accept connection, closing quic transport"); - return Ok(()) - } - }, - connection = self.pending_connections.select_next_some(), if !self.pending_connections.is_empty() => { - let (connection_id, peer, result) = connection; - - if let Err(error) = self.on_connection_established(peer, connection_id, result).await { - tracing::debug!(target: LOG_TARGET, ?peer, ?error, "failed to handle established connection"); - } - } - command = self.context.next() => match command.ok_or(Error::EssentialTaskClosed)? { - TransportManagerCommand::Dial { address, connection } => { - if let Err(error) = self.on_dial_peer(address.clone(), connection).await { - tracing::debug!(target: LOG_TARGET, ?address, ?connection, "failed to dial peer"); - let _ = self.context.report_dial_failure(connection, address, error).await; - } - } - } - } - } - } -} - -#[cfg(test)] -mod tests { - use super::*; - use crate::{ - codec::ProtocolCodec, - crypto::{dilithium::Keypair, PublicKey}, - transport::manager::{ - ProtocolContext, SupportedTransport, TransportHandle, TransportManager, - TransportManagerCommand, TransportManagerEvent, - }, - types::protocol::ProtocolName, - }; - use tokio::sync::mpsc::channel; - - #[tokio::test] - async fn connect_and_accept_works() { - let _ = tracing_subscriber::fmt() - .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) - .try_init(); - - let keypair1 = Keypair::generate(); - let (tx1, _rx1) = channel(64); - let (event_tx1, mut event_rx1) = channel(64); - let (_command_tx1, command_rx1) = channel(64); - - let handle1 = TransportHandle { - protocol_names: Vec::new(), - next_substream_id: Default::default(), - next_connection_id: Default::default(), - tx: event_tx1, - rx: command_rx1, - keypair: keypair1.clone(), - protocols: HashMap::from_iter([( - ProtocolName::from("/notif/1"), - ProtocolContext { - tx: tx1, - codec: ProtocolCodec::Identity(32), - fallback_names: Vec::new(), - }, - )]), - }; - let transport_config1 = config::Config { - listen_address: "/ip4/127.0.0.1/udp/0/quic-v1".parse().unwrap(), - }; - - let transport1 = QuicTransport::new(handle1, transport_config1).await.unwrap(); - - let _peer1: PeerId = PeerId::from_public_key(&PublicKey::from(keypair1.public())); - let listen_address = Transport::listen_address(&transport1).to_string(); - let listen_address: Multiaddr = - format!("{}/p2p/{}", listen_address, _peer1.to_string()).parse().unwrap(); - tokio::spawn(transport1.start()); - - let keypair2 = Keypair::generate(); - let (tx2, _rx2) = channel(64); - let (event_tx2, mut event_rx2) = channel(64); - let (command_tx2, command_rx2) = channel(64); - - let handle2 = TransportHandle { - protocol_names: Vec::new(), - next_substream_id: Default::default(), - next_connection_id: Default::default(), - tx: event_tx2, - rx: command_rx2, - keypair: keypair2.clone(), - protocols: HashMap::from_iter([( - ProtocolName::from("/notif/1"), - ProtocolContext { - tx: tx2, - codec: ProtocolCodec::Identity(32), - fallback_names: Vec::new(), - }, - )]), - }; - let transport_config2 = config::Config { - listen_address: "/ip4/127.0.0.1/udp/0/quic-v1".parse().unwrap(), - }; - - let transport2 = QuicTransport::new(handle2, transport_config2).await.unwrap(); - tokio::spawn(transport2.start()); - - command_tx2 - .send(TransportManagerCommand::Dial { - address: listen_address, - connection: ConnectionId::new(), - }) - .await - .unwrap(); - - let (res1, res2) = tokio::join!(event_rx1.recv(), event_rx2.recv()); - - assert!(std::matches!( - res1, - Some(TransportManagerEvent::ConnectionEstablished { .. }) - )); - assert!(std::matches!( - res2, - Some(TransportManagerEvent::ConnectionEstablished { .. }) - )); - } - - #[tokio::test] - async fn dial_peer_id_missing() { - let (mut manager, _handle) = TransportManager::new(Keypair::generate()); - let handle = manager.register_transport(SupportedTransport::Quic); - let mut transport = QuicTransport::new( - handle, - Config { - listen_address: "/ip4/127.0.0.1/udp/0/quic-v1".parse().unwrap(), - }, - ) - .await - .unwrap(); - - let address = Multiaddr::empty() - .with(Protocol::Ip4(std::net::Ipv4Addr::new(127, 0, 0, 1))) - .with(Protocol::Udp(8888)); - - match transport.on_dial_peer(address, ConnectionId::from(0usize)).await { - Err(Error::AddressError(AddressError::PeerIdMissing)) => {} - _ => panic!("invalid result for `on_dial_peer()`"), - } - } - - #[tokio::test] - async fn dial_failure() { - let _ = tracing_subscriber::fmt() - .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) - .try_init(); - - let (mut manager, _handle) = TransportManager::new(Keypair::generate()); - let handle = manager.register_transport(SupportedTransport::Quic); - let mut transport = QuicTransport::new( - handle, - Config { - listen_address: "/ip4/127.0.0.1/udp/0/quic-v1".parse().unwrap(), - }, - ) - .await - .unwrap(); - - let peer = PeerId::random(); - let address = Multiaddr::empty() - .with(Protocol::from(std::net::Ipv4Addr::new(255, 254, 253, 252))) - .with(Protocol::Udp(8888)) - .with(Protocol::QuicV1) - .with(Protocol::P2p( - Multihash::from_bytes(&peer.to_bytes()).unwrap(), - )); - manager.dial_address(address.clone()).await.unwrap(); - - assert!(transport.pending_dials.is_empty()); - - match transport.on_dial_peer(address, ConnectionId::from(0usize)).await { - Ok(()) => {} - _ => panic!("invalid result for `on_dial_peer()`"), - } - - assert!(!transport.pending_dials.is_empty()); - - tokio::spawn(transport.start()); - - std::matches!( - manager.next().await, - Some(TransportManagerEvent::DialFailure { .. }) - ); - } - - #[tokio::test] - async fn pending_dial_is_cleaned() { - let _ = tracing_subscriber::fmt() - .with_env_filter(tracing_subscriber::EnvFilter::from_default_env()) - .try_init(); - - let keypair = Keypair::generate(); - let (mut manager, _handle) = TransportManager::new(keypair.clone()); - let handle = manager.register_transport(SupportedTransport::Quic); - let mut transport = QuicTransport::new( - handle, - Config { - listen_address: "/ip4/127.0.0.1/udp/0/quic-v1".parse().unwrap(), - }, - ) - .await - .unwrap(); - - let peer = PeerId::random(); - let address = Multiaddr::empty() - .with(Protocol::from(std::net::Ipv4Addr::new(255, 254, 253, 252))) - .with(Protocol::Udp(8888)) - .with(Protocol::QuicV1) - .with(Protocol::P2p( - Multihash::from_bytes(&peer.to_bytes()).unwrap(), - )); - - assert!(transport.pending_dials.is_empty()); - - match transport.on_dial_peer(address.clone(), ConnectionId::from(0usize)).await { - Ok(()) => {} - _ => panic!("invalid result for `on_dial_peer()`"), - } - - assert!(!transport.pending_dials.is_empty()); - - let Ok((socket_address, Some(peer))) = QuicTransport::get_socket_address(&address) else { - panic!("invalid address"); - }; - - let (certificate, key) = generate(&keypair).unwrap(); - let provider = TlsProvider::new(key, certificate, Some(peer), None); - - let client = Client::builder() - .with_tls(provider) - .expect("TLS provider to be enabled successfully") - .with_io("0.0.0.0:0") - .unwrap() - .start() - .unwrap(); - let connect = Connect::new(socket_address).with_server_name("localhost"); - - let _ = transport - .on_connection_established( - peer, - ConnectionId::from(0usize), - client.connect(connect).await, - ) - .await; - - assert!(transport.pending_dials.is_empty()); - } -} diff --git a/client/litep2p/src/transport/webrtc/config.rs b/client/litep2p/src/transport/webrtc/config.rs deleted file mode 100644 index 84e2022e..00000000 --- a/client/litep2p/src/transport/webrtc/config.rs +++ /dev/null @@ -1,46 +0,0 @@ -// Copyright 2023 litep2p developers -// -// Permission is hereby granted, free of charge, to any person obtaining a -// copy of this software and associated documentation files (the "Software"), -// to deal in the Software without restriction, including without limitation -// the rights to use, copy, modify, merge, publish, distribute, sublicense, -// and/or sell copies of the Software, and to permit persons to whom the -// Software is furnished to do so, subject to the following conditions: -// -// The above copyright notice and this permission notice shall be included in -// all copies or substantial portions of the Software. -// -// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS -// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, -// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE -// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER -// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING -// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER -// DEALINGS IN THE SOFTWARE. - -//! WebRTC transport configuration. - -use multiaddr::Multiaddr; - -/// WebRTC transport configuration. -#[derive(Debug)] -pub struct Config { - /// WebRTC listening address. - pub listen_addresses: Vec, - - /// Connection datagram buffer size. - /// - /// How many datagrams can the buffer between `WebRtcTransport` and a connection handler hold. - pub datagram_buffer_size: usize, -} - -impl Default for Config { - fn default() -> Self { - Self { - listen_addresses: vec!["/ip4/127.0.0.1/udp/8888/webrtc-direct" - .parse() - .expect("valid multiaddress")], - datagram_buffer_size: 2048, - } - } -} diff --git a/client/litep2p/src/transport/webrtc/connection.rs b/client/litep2p/src/transport/webrtc/connection.rs deleted file mode 100644 index ffd72aca..00000000 --- a/client/litep2p/src/transport/webrtc/connection.rs +++ /dev/null @@ -1,823 +0,0 @@ -// Copyright 2023 litep2p developers -// -// Permission is hereby granted, free of charge, to any person obtaining a -// copy of this software and associated documentation files (the "Software"), -// to deal in the Software without restriction, including without limitation -// the rights to use, copy, modify, merge, publish, distribute, sublicense, -// and/or sell copies of the Software, and to permit persons to whom the -// Software is furnished to do so, subject to the following conditions: -// -// The above copyright notice and this permission notice shall be included in -// all copies or substantial portions of the Software. -// -// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS -// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, -// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE -// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER -// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING -// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER -// DEALINGS IN THE SOFTWARE. - -use crate::{ - error::{Error, ParseError, SubstreamError}, - multistream_select::{ - webrtc_listener_negotiate, HandshakeResult, ListenerSelectResult, WebRtcDialerState, - }, - protocol::{Direction, Permit, ProtocolCommand, ProtocolSet, SubstreamKeepAlive}, - substream::Substream, - transport::{ - webrtc::{ - schema::webrtc::message::Flag, - substream::{Event as SubstreamEvent, Substream as WebRtcSubstream, SubstreamHandle}, - util::WebRtcMessage, - }, - Endpoint, - }, - types::{protocol::ProtocolName, SubstreamId}, - PeerId, -}; - -use futures::{Stream, StreamExt}; -use indexmap::IndexMap; -use str0m::{ - channel::{ChannelConfig, ChannelId}, - net::{Protocol as Str0mProtocol, Receive}, - Event, IceConnectionState, Input, Output, Rtc, -}; -use tokio::{net::UdpSocket, sync::mpsc::Receiver}; - -use std::{ - collections::HashMap, - net::SocketAddr, - pin::Pin, - sync::Arc, - task::{Context, Poll}, - time::Instant, -}; - -/// Logging target for the file. -const LOG_TARGET: &str = "litep2p::webrtc::connection"; - -/// Opening channel context. -#[derive(Debug)] -struct ChannelContext { - /// Protocol name. - protocol: ProtocolName, - - /// Fallback names. - fallback_names: Vec, - - /// Substream ID. - substream_id: SubstreamId, - - /// Permit which keeps the connection open while we are opening a substream. Must be returned - /// to [`TransportService`](crate::protocol::TransportService), where it can be safely dropped - /// after upgrading the connection. - opening_permit: Permit, - - /// Whether this substream should keep the connection alive while it exists, i.e., whether it - /// should store the permit entioned above for the lifetime of the substream. - keep_alive: SubstreamKeepAlive, -} - -/// Set of [`SubstreamHandle`]s. -struct SubstreamHandleSet { - /// Current index. - index: usize, - - /// Substream handles. - handles: IndexMap, -} - -impl SubstreamHandleSet { - /// Create new [`SubstreamHandleSet`]. - pub fn new() -> Self { - Self { index: 0usize, handles: IndexMap::new() } - } - - /// Get mutable access to `SubstreamHandle`. - pub fn get_mut(&mut self, key: &ChannelId) -> Option<&mut SubstreamHandle> { - self.handles.get_mut(key) - } - - /// Insert new handle to [`SubstreamHandleSet`]. - pub fn insert(&mut self, key: ChannelId, handle: SubstreamHandle) { - assert!(self.handles.insert(key, handle).is_none()); - } - - /// Remove handle from [`SubstreamHandleSet`]. - pub fn remove(&mut self, key: &ChannelId) -> Option { - self.handles.shift_remove(key) - } -} - -impl Stream for SubstreamHandleSet { - type Item = (ChannelId, Option); - - fn poll_next(mut self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll> { - let len = match self.handles.len() { - 0 => return Poll::Pending, - len => len, - }; - let start_index = self.index; - - loop { - let index = self.index % len; - self.index += 1; - - let (key, stream) = self.handles.get_index_mut(index).expect("handle to exist"); - match stream.poll_next_unpin(cx) { - Poll::Pending => {}, - Poll::Ready(event) => return Poll::Ready(Some((*key, event))), - } - - if self.index == start_index + len { - break Poll::Pending; - } - } - } -} - -/// Channel state. -#[derive(Debug)] -enum ChannelState { - /// Channel is closing. - Closing, - - /// Inbound channel is opening. - InboundOpening, - - /// Outbound channel is opening. - OutboundOpening { - /// Channel context. - context: ChannelContext, - - /// `multistream-select` dialer state. - dialer_state: WebRtcDialerState, - }, - - /// Channel is open. - Open { - /// Substream ID. - substream_id: SubstreamId, - - /// Channel ID. - channel_id: ChannelId, - - /// Connection permit if this substream needs to keep connection open. - lifetime_permit: Option, - }, -} - -/// WebRTC connection. -pub struct WebRtcConnection { - /// `str0m` WebRTC object. - rtc: Rtc, - - /// Protocol set. - protocol_set: ProtocolSet, - - /// Remote peer ID. - peer: PeerId, - - /// Endpoint. - endpoint: Endpoint, - - /// Peer address - peer_address: SocketAddr, - - /// Local address. - local_address: SocketAddr, - - /// Transport socket. - socket: Arc, - - /// RX channel for receiving datagrams from the transport. - dgram_rx: Receiver>, - - /// Pending outbound channels. - pending_outbound: HashMap, - - /// Open channels. - channels: HashMap, - - /// Substream handles. - handles: SubstreamHandleSet, -} - -impl WebRtcConnection { - /// Create new [`WebRtcConnection`]. - pub fn new( - rtc: Rtc, - peer: PeerId, - peer_address: SocketAddr, - local_address: SocketAddr, - socket: Arc, - protocol_set: ProtocolSet, - endpoint: Endpoint, - dgram_rx: Receiver>, - ) -> Self { - Self { - rtc, - protocol_set, - peer, - peer_address, - local_address, - socket, - endpoint, - dgram_rx, - pending_outbound: HashMap::new(), - channels: HashMap::new(), - handles: SubstreamHandleSet::new(), - } - } - - /// Handle opened channel. - /// - /// If the channel is inbound, nothing is done because we have to wait for data - /// `multistream-select` handshake to be received from remote peer before anything - /// else can be done. - /// - /// If the channel is outbound, send `multistream-select` handshake to remote peer. - async fn on_channel_opened( - &mut self, - channel_id: ChannelId, - channel_name: String, - ) -> crate::Result<()> { - tracing::trace!( - target: LOG_TARGET, - peer = ?self.peer, - ?channel_id, - ?channel_name, - "channel opened", - ); - - let Some(mut context) = self.pending_outbound.remove(&channel_id) else { - tracing::trace!( - target: LOG_TARGET, - peer = ?self.peer, - ?channel_id, - "inbound channel opened, wait for `multistream-select` message", - ); - - self.channels.insert(channel_id, ChannelState::InboundOpening); - return Ok(()); - }; - - let fallback_names = std::mem::take(&mut context.fallback_names); - let (dialer_state, message) = - WebRtcDialerState::propose(context.protocol.clone(), fallback_names)?; - let message = WebRtcMessage::encode(message, None); - - self.rtc - .channel(channel_id) - .ok_or(Error::ChannelDoesntExist)? - .write(true, message.as_ref()) - .map_err(Error::WebRtc)?; - - self.channels - .insert(channel_id, ChannelState::OutboundOpening { context, dialer_state }); - - Ok(()) - } - - /// Handle closed channel. - async fn on_channel_closed(&mut self, channel_id: ChannelId) -> crate::Result<()> { - tracing::trace!( - target: LOG_TARGET, - peer = ?self.peer, - ?channel_id, - "channel closed", - ); - - self.pending_outbound.remove(&channel_id); - self.channels.remove(&channel_id); - self.handles.remove(&channel_id); - - Ok(()) - } - - /// Handle data received to an opening inbound channel. - /// - /// The first message received over an inbound channel is the `multistream-select` handshake. - /// This handshake contains the protocol (and potentially fallbacks for that protocol) that - /// remote peer wants to use for this channel. Parse the handshake and check if any of the - /// proposed protocols are supported by the local node. If not, send rejection to remote peer - /// and close the channel. If the local node supports one of the protocols, send confirmation - /// for the protocol to remote peer and report an opened substream to the selected protocol. - async fn on_inbound_opening_channel_data( - &mut self, - channel_id: ChannelId, - data: Vec, - ) -> crate::Result<(SubstreamId, SubstreamHandle, Option)> { - tracing::trace!( - target: LOG_TARGET, - peer = ?self.peer, - ?channel_id, - "handle opening inbound substream", - ); - - let payload = WebRtcMessage::decode(&data)?.payload.ok_or(Error::InvalidData)?; - let protocols = self.protocol_set.protocols_with_keep_alives(); - let protocol_names = protocols.keys().cloned().collect(); - let (response, negotiated) = - match webrtc_listener_negotiate(protocol_names, payload.into())? { - ListenerSelectResult::Accepted { protocol, message } => (message, Some(protocol)), - ListenerSelectResult::Rejected { message } => (message, None), - }; - - self.rtc - .channel(channel_id) - .ok_or(Error::ChannelDoesntExist)? - .write(true, WebRtcMessage::encode(response.to_vec(), None).as_ref()) - .map_err(Error::WebRtc)?; - - let protocol = negotiated.ok_or(Error::SubstreamDoesntExist)?; - let substream_id = self.protocol_set.next_substream_id(); - let codec = self.protocol_set.protocol_codec(&protocol); - let opening_permit = self.protocol_set.try_get_permit().ok_or(Error::ConnectionClosed)?; - let (substream, handle) = WebRtcSubstream::new(); - let substream = Substream::new_webrtc(self.peer, substream_id, substream, codec); - let keep_alive = - protocols.get(&protocol).expect("negotiated protocol to be one of the keys"); - let lifetime_permit = keep_alive.then(|| opening_permit.clone()); - - tracing::trace!( - target: LOG_TARGET, - peer = ?self.peer, - ?channel_id, - ?substream_id, - ?protocol, - "inbound substream opened", - ); - - self.protocol_set - .report_substream_open( - self.peer, - protocol.clone(), - Direction::Inbound, - substream, - opening_permit, - ) - .await - .map(|_| (substream_id, handle, lifetime_permit)) - .map_err(Into::into) - } - - /// Handle data received to an opening outbound channel. - /// - /// When an outbound channel is opened, the first message the local node sends it the - /// `multistream-select` handshake which contains the protocol (and any fallbacks for that - /// protocol) that the local node wants to use to negotiate for the channel. When a message is - /// received from a remote peer for a channel in state [`ChannelState::OutboundOpening`], parse - /// the `multistream-select` handshake response. The response either contains a rejection which - /// causes the substream to be closed, a partial response, or a full response. If a partial - /// response is heard, e.g., only the header line is received, the handshake cannot be concluded - /// and the channel is placed back in the [`ChannelState::OutboundOpening`] state to wait for - /// the rest of the handshake. If a full response is received (or rest of the partial response), - /// the protocol confirmation is verified and the substream is reported to the protocol. - /// - /// If the substream fails to open for whatever reason, since this is an outbound substream, - /// the protocol is notified of the failure. - async fn on_outbound_opening_channel_data( - &mut self, - channel_id: ChannelId, - data: Vec, - mut dialer_state: WebRtcDialerState, - context: ChannelContext, - ) -> Result, SubstreamError> { - tracing::trace!( - target: LOG_TARGET, - peer = ?self.peer, - ?channel_id, - data_len = ?data.len(), - "handle opening outbound substream", - ); - - let rtc_message = WebRtcMessage::decode(&data) - .map_err(|err| SubstreamError::NegotiationError(err.into()))?; - let message = rtc_message - .payload - .ok_or(SubstreamError::NegotiationError(ParseError::InvalidData.into()))?; - - let HandshakeResult::Succeeded(protocol) = dialer_state.register_response(message)? else { - tracing::trace!( - target: LOG_TARGET, - peer = ?self.peer, - ?channel_id, - "multistream-select handshake not ready", - ); - - self.channels - .insert(channel_id, ChannelState::OutboundOpening { context, dialer_state }); - - return Ok(None); - }; - - let ChannelContext { substream_id, opening_permit, .. } = context; - let codec = self.protocol_set.protocol_codec(&protocol); - let (substream, handle) = WebRtcSubstream::new(); - let substream = Substream::new_webrtc(self.peer, substream_id, substream, codec); - - tracing::trace!( - target: LOG_TARGET, - peer = ?self.peer, - ?channel_id, - ?substream_id, - ?protocol, - "outbound substream opened", - ); - - self.protocol_set - .report_substream_open( - self.peer, - protocol.clone(), - Direction::Outbound(substream_id), - substream, - opening_permit, - ) - .await - .map(|_| Some((substream_id, handle))) - } - - /// Handle data received from an open channel. - async fn on_open_channel_data( - &mut self, - channel_id: ChannelId, - data: Vec, - ) -> crate::Result<()> { - let message = WebRtcMessage::decode(&data)?; - - tracing::trace!( - target: LOG_TARGET, - peer = ?self.peer, - ?channel_id, - flag = ?message.flag, - data_len = message.payload.as_ref().map_or(0usize, |payload| payload.len()), - "handle inbound message", - ); - - self.handles - .get_mut(&channel_id) - .ok_or_else(|| { - tracing::warn!( - target: LOG_TARGET, - peer = ?self.peer, - ?channel_id, - "data received from an unknown channel", - ); - debug_assert!(false); - Error::InvalidState - })? - .on_message(message) - .await - } - - /// Handle data received from a channel. - async fn on_inbound_data(&mut self, channel_id: ChannelId, data: Vec) -> crate::Result<()> { - let Some(state) = self.channels.remove(&channel_id) else { - tracing::warn!( - target: LOG_TARGET, - peer = ?self.peer, - ?channel_id, - "data received over a channel that doesn't exist", - ); - debug_assert!(false); - return Err(Error::InvalidState); - }; - - match state { - ChannelState::InboundOpening => { - match self.on_inbound_opening_channel_data(channel_id, data).await { - Ok((substream_id, handle, lifetime_permit)) => { - self.handles.insert(channel_id, handle); - self.channels.insert( - channel_id, - ChannelState::Open { substream_id, channel_id, lifetime_permit }, - ); - }, - Err(error) => { - tracing::debug!( - target: LOG_TARGET, - peer = ?self.peer, - ?channel_id, - ?error, - "failed to handle opening inbound substream", - ); - - self.channels.insert(channel_id, ChannelState::Closing); - self.rtc.direct_api().close_data_channel(channel_id); - }, - } - }, - ChannelState::OutboundOpening { context, dialer_state } => { - let protocol = context.protocol.clone(); - let substream_id = context.substream_id; - let lifetime_permit = context.keep_alive.then(|| context.opening_permit.clone()); - - match self - .on_outbound_opening_channel_data(channel_id, data, dialer_state, context) - .await - { - Ok(Some((substream_id, handle))) => { - self.handles.insert(channel_id, handle); - self.channels.insert( - channel_id, - ChannelState::Open { substream_id, channel_id, lifetime_permit }, - ); - }, - Ok(None) => {}, - Err(error) => { - tracing::debug!( - target: LOG_TARGET, - peer = ?self.peer, - ?channel_id, - ?error, - "failed to handle opening outbound substream", - ); - - let _ = self - .protocol_set - .report_substream_open_failure(protocol, substream_id, error) - .await; - - self.rtc.direct_api().close_data_channel(channel_id); - self.channels.insert(channel_id, ChannelState::Closing); - }, - } - }, - ChannelState::Open { substream_id, channel_id, lifetime_permit } => - match self.on_open_channel_data(channel_id, data).await { - Ok(()) => { - self.channels.insert( - channel_id, - ChannelState::Open { substream_id, channel_id, lifetime_permit }, - ); - }, - Err(error) => { - tracing::debug!( - target: LOG_TARGET, - peer = ?self.peer, - ?channel_id, - ?error, - "failed to handle data for an open channel", - ); - - self.rtc.direct_api().close_data_channel(channel_id); - self.channels.insert(channel_id, ChannelState::Closing); - }, - }, - ChannelState::Closing => { - tracing::debug!( - target: LOG_TARGET, - peer = ?self.peer, - ?channel_id, - "channel closing, discarding received data", - ); - self.channels.insert(channel_id, ChannelState::Closing); - }, - } - - Ok(()) - } - - /// Handle outbound data with optional flag. - fn on_outbound_data( - &mut self, - channel_id: ChannelId, - data: Vec, - flag: Option, - ) -> crate::Result<()> { - tracing::trace!( - target: LOG_TARGET, - peer = ?self.peer, - ?channel_id, - data_len = ?data.len(), - ?flag, - "send data", - ); - - self.rtc - .channel(channel_id) - .ok_or(Error::ChannelDoesntExist)? - .write(true, WebRtcMessage::encode(data, flag).as_ref()) - .map_err(Error::WebRtc) - .map(|_| ()) - } - - /// Open outbound substream. - fn on_open_substream( - &mut self, - protocol: ProtocolName, - fallback_names: Vec, - substream_id: SubstreamId, - opening_permit: Permit, - keep_alive: SubstreamKeepAlive, - ) { - let channel_id = self.rtc.direct_api().create_data_channel(ChannelConfig { - label: "".to_string(), - ordered: false, - reliability: Default::default(), - negotiated: None, - protocol: protocol.to_string(), - }); - - tracing::trace!( - target: LOG_TARGET, - peer = ?self.peer, - ?channel_id, - ?substream_id, - ?protocol, - ?fallback_names, - "open data channel", - ); - - self.pending_outbound.insert( - channel_id, - ChannelContext { protocol, fallback_names, substream_id, opening_permit, keep_alive }, - ); - } - - /// Connection to peer has been closed. - async fn on_connection_closed(&mut self) { - tracing::trace!( - target: LOG_TARGET, - peer = ?self.peer, - "connection closed", - ); - - let _ = self - .protocol_set - .report_connection_closed(self.peer, self.endpoint.connection_id()) - .await; - } - - /// Start the connection event loop without notifying protocols. - pub async fn run_event_loop(mut self) { - loop { - // poll output until we get a timeout - let timeout = match self.rtc.poll_output().unwrap() { - Output::Timeout(v) => v, - Output::Transmit(v) => { - tracing::trace!( - target: LOG_TARGET, - peer = ?self.peer, - datagram_len = ?v.contents.len(), - "transmit data", - ); - - self.socket.try_send_to(&v.contents, v.destination).unwrap(); - continue; - }, - Output::Event(v) => match v { - Event::IceConnectionStateChange(IceConnectionState::Disconnected) => { - tracing::trace!( - target: LOG_TARGET, - peer = ?self.peer, - "ice connection state changed to closed", - ); - return self.on_connection_closed().await; - }, - Event::ChannelOpen(channel_id, name) => { - if let Err(error) = self.on_channel_opened(channel_id, name).await { - tracing::debug!( - target: LOG_TARGET, - peer = ?self.peer, - ?channel_id, - ?error, - "failed to handle opened channel", - ); - } - - continue; - }, - Event::ChannelClose(channel_id) => { - if let Err(error) = self.on_channel_closed(channel_id).await { - tracing::debug!( - target: LOG_TARGET, - peer = ?self.peer, - ?channel_id, - ?error, - "failed to handle closed channel", - ); - } - - continue; - }, - Event::ChannelData(info) => { - if let Err(error) = self.on_inbound_data(info.id, info.data).await { - tracing::debug!( - target: LOG_TARGET, - peer = ?self.peer, - channel_id = ?info.id, - ?error, - "failed to handle channel data", - ); - } - - continue; - }, - event => { - tracing::debug!( - target: LOG_TARGET, - peer = ?self.peer, - ?event, - "unhandled event", - ); - continue; - }, - }, - }; - - let duration = timeout - Instant::now(); - if duration.is_zero() { - self.rtc.handle_input(Input::Timeout(Instant::now())).unwrap(); - continue; - } - - tokio::select! { - biased; - datagram = self.dgram_rx.recv() => match datagram { - Some(datagram) => { - let input = Input::Receive( - Instant::now(), - Receive { - proto: Str0mProtocol::Udp, - source: self.peer_address, - destination: self.local_address, - contents: datagram.as_slice().try_into().unwrap(), - }, - ); - - self.rtc.handle_input(input).unwrap(); - } - None => { - tracing::trace!( - target: LOG_TARGET, - peer = ?self.peer, - "read `None` from `dgram_rx`", - ); - return self.on_connection_closed().await; - } - }, - event = self.handles.next() => match event { - None => unreachable!(), - Some((channel_id, None)) => { - tracing::trace!( - target: LOG_TARGET, - peer = ?self.peer, - ?channel_id, - "channel closed", - ); - - self.rtc.direct_api().close_data_channel(channel_id); - self.channels.insert(channel_id, ChannelState::Closing); - self.handles.remove(&channel_id); - } - Some((channel_id, Some(SubstreamEvent::Message { payload, flag }))) => { - if let Err(error) = self.on_outbound_data(channel_id, payload, flag) { - tracing::debug!( - target: LOG_TARGET, - ?channel_id, - ?flag, - ?error, - "failed to send data to remote peer", - ); - } - } - Some((_, Some(SubstreamEvent::RecvClosed))) => {} - }, - command = self.protocol_set.next() => match command { - None | Some(ProtocolCommand::ForceClose) => { - tracing::trace!( - target: LOG_TARGET, - peer = ?self.peer, - ?command, - "`ProtocolSet` instructed to close connection", - ); - return self.on_connection_closed().await; - } - Some(ProtocolCommand::OpenSubstream { - protocol, - fallback_names, - substream_id, - permit, - keep_alive, - connection_id: _, - }) => { - self.on_open_substream( - protocol, - fallback_names, - substream_id, - permit, - keep_alive, - ); - } - }, - _ = tokio::time::sleep(duration) => { - self.rtc.handle_input(Input::Timeout(Instant::now())).unwrap(); - } - } - } - } -} diff --git a/client/litep2p/src/transport/webrtc/mod.rs b/client/litep2p/src/transport/webrtc/mod.rs deleted file mode 100644 index 9b04d621..00000000 --- a/client/litep2p/src/transport/webrtc/mod.rs +++ /dev/null @@ -1,801 +0,0 @@ -// Copyright 2023 litep2p developers -// -// Permission is hereby granted, free of charge, to any person obtaining a -// copy of this software and associated documentation files (the "Software"), -// to deal in the Software without restriction, including without limitation -// the rights to use, copy, modify, merge, publish, distribute, sublicense, -// and/or sell copies of the Software, and to permit persons to whom the -// Software is furnished to do so, subject to the following conditions: -// -// The above copyright notice and this permission notice shall be included in -// all copies or substantial portions of the Software. -// -// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS -// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, -// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE -// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER -// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING -// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER -// DEALINGS IN THE SOFTWARE. - -//! WebRTC transport. - -use crate::{ - error::{AddressError, Error}, - transport::{ - manager::TransportHandle, - webrtc::{config::Config, connection::WebRtcConnection, opening::OpeningWebRtcConnection}, - Endpoint, Transport, TransportBuilder, TransportEvent, - }, - types::ConnectionId, - PeerId, -}; - -use futures::{future::BoxFuture, Future, Stream}; -use futures_timer::Delay; -use hickory_resolver::TokioResolver; -use multiaddr::{multihash::Multihash, Multiaddr, Protocol}; -use socket2::{Domain, Socket, Type}; -use str0m::{ - channel::{ChannelConfig, ChannelId}, - config::{CryptoProvider, DtlsCert, DtlsCertOptions}, - ice::IceCreds, - net::{DatagramRecv, Protocol as Str0mProtocol, Receive}, - Candidate, DtlsCertConfig, Input, Rtc, -}; - -use tokio::{ - io::ReadBuf, - net::UdpSocket, - sync::mpsc::{channel, error::TrySendError, Sender}, -}; - -use std::{ - collections::{hash_map::Entry, HashMap, VecDeque}, - net::{IpAddr, SocketAddr}, - pin::Pin, - sync::Arc, - task::{Context, Poll}, - time::{Duration, Instant}, -}; - -pub(crate) use substream::Substream; - -mod connection; -mod opening; -mod substream; -mod util; - -pub mod config; - -pub(super) mod schema { - pub(super) mod webrtc { - include!(concat!(env!("OUT_DIR"), "/webrtc.rs")); - } - - pub(super) mod noise { - include!(concat!(env!("OUT_DIR"), "/noise.rs")); - } -} - -/// Logging target for the file. -const LOG_TARGET: &str = "litep2p::webrtc"; - -/// Hardcoded remote fingerprint. -const REMOTE_FINGERPRINT: &str = - "sha-256 FF:FF:FF:FF:FF:FF:FF:FF:FF:FF:FF:FF:FF:FF:FF:FF:FF:FF:FF:FF:FF:FF:FF:FF:FF:FF:FF:FF:FF:FF:FF:FF"; - -/// Connection context. -struct ConnectionContext { - /// Remote peer ID. - peer: PeerId, - - /// Connection ID. - connection_id: ConnectionId, - - /// TX channel for sending datagrams to the connection event loop. - tx: Sender>, -} - -/// Events received from opening connections that are handled -/// by the [`WebRtcTransport`] event loop. -enum ConnectionEvent { - /// Connection established. - ConnectionEstablished { - /// Remote peer ID. - peer: PeerId, - - /// Endpoint. - endpoint: Endpoint, - }, - - /// Connection to peer closed. - ConnectionClosed, - - /// Timeout. - Timeout { - /// Timeout duration. - duration: Duration, - }, -} - -/// WebRTC transport. -pub(crate) struct WebRtcTransport { - /// Transport context. - context: TransportHandle, - - /// UDP socket. - socket: Arc, - - /// DTLS certificate. - dtls_cert: DtlsCert, - - /// Assigned listen addresss. - listen_address: SocketAddr, - - /// Datagram buffer size. - datagram_buffer_size: usize, - - /// Connected peers. - open: HashMap, - - /// OpeningWebRtc connections. - opening: HashMap, - - /// `ConnectionId -> SocketAddr` mappings. - connections: HashMap, - - /// Pending timeouts. - timeouts: HashMap>, - - /// Pending events. - pending_events: VecDeque, -} - -impl WebRtcTransport { - /// Extract socket address and `PeerId`, if found, from `address`. - fn get_socket_address(address: &Multiaddr) -> crate::Result<(SocketAddr, Option)> { - tracing::trace!(target: LOG_TARGET, ?address, "parse multi address"); - - let mut iter = address.iter(); - let socket_address = match iter.next() { - Some(Protocol::Ip6(address)) => match iter.next() { - Some(Protocol::Udp(port)) => SocketAddr::new(IpAddr::V6(address), port), - protocol => { - tracing::error!( - target: LOG_TARGET, - ?protocol, - "invalid transport protocol, expected `Upd`", - ); - return Err(Error::AddressError(AddressError::InvalidProtocol)); - }, - }, - Some(Protocol::Ip4(address)) => match iter.next() { - Some(Protocol::Udp(port)) => SocketAddr::new(IpAddr::V4(address), port), - protocol => { - tracing::error!( - target: LOG_TARGET, - ?protocol, - "invalid transport protocol, expected `Udp`", - ); - return Err(Error::AddressError(AddressError::InvalidProtocol)); - }, - }, - protocol => { - tracing::error!(target: LOG_TARGET, ?protocol, "invalid transport protocol"); - return Err(Error::AddressError(AddressError::InvalidProtocol)); - }, - }; - - match iter.next() { - Some(Protocol::WebRTC) => {}, - protocol => { - tracing::error!( - target: LOG_TARGET, - ?protocol, - "invalid protocol, expected `WebRTC`" - ); - return Err(Error::AddressError(AddressError::InvalidProtocol)); - }, - } - - let maybe_peer = match iter.next() { - Some(Protocol::P2p(multihash)) => Some(PeerId::from_multihash(multihash)?), - None => None, - protocol => { - tracing::error!( - target: LOG_TARGET, - ?protocol, - "invalid protocol, expected `P2p` or `None`" - ); - return Err(Error::AddressError(AddressError::InvalidProtocol)); - }, - }; - - Ok((socket_address, maybe_peer)) - } - - /// Create RTC client and open channel for Noise handshake. - fn make_rtc_client( - &self, - ufrag: &str, - pass: &str, - source: SocketAddr, - destination: SocketAddr, - ) -> (Rtc, ChannelId) { - let mut rtc = Rtc::builder() - .set_ice_lite(true) - .set_dtls_cert_config(DtlsCertConfig::PregeneratedCert(self.dtls_cert.clone())) - .set_fingerprint_verification(false) - .build(); - rtc.add_local_candidate(Candidate::host(destination, Str0mProtocol::Udp).unwrap()); - rtc.add_remote_candidate(Candidate::host(source, Str0mProtocol::Udp).unwrap()); - rtc.direct_api() - .set_remote_fingerprint(REMOTE_FINGERPRINT.parse().expect("parse() to succeed")); - rtc.direct_api().set_remote_ice_credentials(IceCreds { - ufrag: ufrag.to_owned(), - pass: pass.to_owned(), - }); - rtc.direct_api() - .set_local_ice_credentials(IceCreds { ufrag: ufrag.to_owned(), pass: pass.to_owned() }); - rtc.direct_api().set_ice_controlling(false); - rtc.direct_api().start_dtls(false).unwrap(); - rtc.direct_api().start_sctp(false); - - let noise_channel_id = rtc.direct_api().create_data_channel(ChannelConfig { - label: "noise".to_string(), - ordered: false, - reliability: Default::default(), - negotiated: Some(0), - protocol: "".to_string(), - }); - - (rtc, noise_channel_id) - } - - /// Poll opening connection. - fn poll_connection(&mut self, source: &SocketAddr) -> ConnectionEvent { - let Some(connection) = self.opening.get_mut(source) else { - tracing::warn!( - target: LOG_TARGET, - ?source, - "connection doesn't exist", - ); - return ConnectionEvent::ConnectionClosed; - }; - - loop { - match connection.poll_process() { - opening::WebRtcEvent::Timeout { timeout } => { - let duration = timeout - Instant::now(); - - match duration.is_zero() { - true => match connection.on_timeout() { - Ok(()) => continue, - Err(error) => { - tracing::debug!( - target: LOG_TARGET, - ?source, - ?error, - "failed to handle timeout", - ); - - return ConnectionEvent::ConnectionClosed; - }, - }, - false => return ConnectionEvent::Timeout { duration }, - } - }, - opening::WebRtcEvent::Transmit { destination, datagram } => - if let Err(error) = self.socket.try_send_to(&datagram, destination) { - tracing::warn!( - target: LOG_TARGET, - ?source, - ?error, - "failed to send datagram", - ); - }, - opening::WebRtcEvent::ConnectionClosed => return ConnectionEvent::ConnectionClosed, - opening::WebRtcEvent::ConnectionOpened { peer, endpoint } => { - return ConnectionEvent::ConnectionEstablished { peer, endpoint }; - }, - } - } - } - - /// Handle socket input. - /// - /// If the datagram was received from an active client, it's dispatched to the connection - /// handler, if there is space in the queue. If the datagram opened a new connection or it - /// belonged to a client who is opening, the event loop is instructed to poll the client - /// until it timeouts. - /// - /// Returns `true` if the client should be polled. - fn on_socket_input(&mut self, source: SocketAddr, buffer: Vec) -> crate::Result { - if let Entry::Occupied(mut entry) = self.open.entry(source) { - let ConnectionContext { peer, connection_id, tx } = entry.get_mut(); - - match tx.try_send(buffer) { - Ok(_) => return Ok(false), - Err(TrySendError::Full(_)) => { - tracing::warn!( - target: LOG_TARGET, - ?source, - ?peer, - ?connection_id, - "channel full, dropping datagram", - ); - - return Ok(false); - }, - Err(TrySendError::Closed(_)) => { - tracing::debug!( - target: LOG_TARGET, - ?source, - ?peer, - ?connection_id, - "connection closed, removing stale entry", - ); - - entry.remove(); - return Ok(false); - }, - } - } - - if buffer.is_empty() { - // str0m crate panics if the buffer doesn't contain at least one byte: - // https://github.com/algesten/str0m/blob/2c5dc8ee8ddead08699dd6852a27476af6992a5c/src/io/mod.rs#L222 - return Err(Error::InvalidData); - } - - // if the peer doesn't exist, decode the message and expect to receive `Stun` - // so that a new connection can be initialized - let contents: DatagramRecv = - buffer.as_slice().try_into().map_err(|_| Error::InvalidData)?; - - // Handle non stun packets. - if !is_stun_packet(&buffer) { - tracing::debug!( - target: LOG_TARGET, - ?source, - "received non-stun message" - ); - - match self.opening.get_mut(&source) { - Some(connection) => - if let Err(error) = connection.on_input(contents) { - tracing::error!( - target: LOG_TARGET, - ?error, - ?source, - "failed to handle inbound datagram" - ); - }, - None => { - tracing::warn!( - target: LOG_TARGET, - ?source, - "received non-stun message from unknown peer", - ); - return Err(Error::InvalidData); - }, - }; - - return Ok(true); - } - - let stun_message = - str0m::ice::StunMessage::parse(&buffer).map_err(|_| Error::InvalidData)?; - let Some((ufrag, pass)) = stun_message.split_username() else { - tracing::warn!( - target: LOG_TARGET, - ?source, - "failed to split username/password", - ); - return Err(Error::InvalidData); - }; - - tracing::debug!( - target: LOG_TARGET, - ?source, - ?ufrag, - ?pass, - "received stun message" - ); - - // create new `Rtc` object for the peer and give it the received STUN message - let (mut rtc, noise_channel_id) = - self.make_rtc_client(ufrag, pass, source, self.socket.local_addr().unwrap()); - - rtc.handle_input(Input::Receive( - Instant::now(), - Receive { - source, - proto: Str0mProtocol::Udp, - destination: self.socket.local_addr().unwrap(), - contents, - }, - )) - .expect("client to handle input successfully"); - - let connection_id = self.context.next_connection_id(); - let connection = OpeningWebRtcConnection::new( - rtc, - connection_id, - noise_channel_id, - self.context.keypair.clone(), - source, - self.listen_address, - ); - self.opening.insert(source, connection); - - Ok(true) - } -} - -impl TransportBuilder for WebRtcTransport { - type Config = Config; - type Transport = WebRtcTransport; - - /// Create new [`Transport`] object. - fn new( - context: TransportHandle, - config: Self::Config, - _resolver: Arc, - ) -> crate::Result<(Self, Vec)> - where - Self: Sized, - { - tracing::info!( - target: LOG_TARGET, - listen_addresses = ?config.listen_addresses, - "start webrtc transport", - ); - - let (listen_address, _) = Self::get_socket_address(&config.listen_addresses[0])?; - - let socket = if listen_address.is_ipv4() { - let socket = Socket::new(Domain::IPV4, Type::DGRAM, Some(socket2::Protocol::UDP))?; - socket.bind(&listen_address.into())?; - socket - } else { - let socket = Socket::new(Domain::IPV6, Type::DGRAM, Some(socket2::Protocol::UDP))?; - socket.set_only_v6(true)?; - socket.bind(&listen_address.into())?; - socket - }; - - socket.set_reuse_address(true)?; - socket.set_nonblocking(true)?; - #[cfg(unix)] - socket.set_reuse_port(true)?; - - let socket = UdpSocket::from_std(socket.into())?; - let listen_address = socket.local_addr()?; - let dtls_cert = DtlsCert::new(CryptoProvider::OpenSsl, DtlsCertOptions::default()); - - let listen_multi_addresses = { - let fingerprint = dtls_cert.fingerprint().bytes; - - const MULTIHASH_SHA256_CODE: u64 = 0x12; - let certificate = Multihash::wrap(MULTIHASH_SHA256_CODE, &fingerprint) - .expect("fingerprint's len to be 32 bytes"); - - vec![Multiaddr::empty() - .with(Protocol::from(listen_address.ip())) - .with(Protocol::Udp(listen_address.port())) - .with(Protocol::WebRTC) - .with(Protocol::Certhash(certificate))] - }; - - Ok(( - Self { - context, - dtls_cert, - listen_address, - open: HashMap::new(), - opening: HashMap::new(), - connections: HashMap::new(), - socket: Arc::new(socket), - timeouts: HashMap::new(), - pending_events: VecDeque::new(), - datagram_buffer_size: config.datagram_buffer_size, - }, - listen_multi_addresses, - )) - } -} - -impl Transport for WebRtcTransport { - fn dial(&mut self, connection_id: ConnectionId, address: Multiaddr) -> crate::Result<()> { - tracing::warn!( - target: LOG_TARGET, - ?connection_id, - ?address, - "webrtc cannot dial", - ); - - debug_assert!(false); - Err(Error::NotSupported("webrtc cannot dial peers".to_string())) - } - - fn accept_pending(&mut self, connection_id: ConnectionId) -> crate::Result<()> { - tracing::trace!( - target: LOG_TARGET, - ?connection_id, - "webrtc cannot accept pending connections", - ); - - debug_assert!(false); - Err(Error::NotSupported("webrtc cannot accept pending connections".to_string())) - } - - fn reject_pending(&mut self, connection_id: ConnectionId) -> crate::Result<()> { - tracing::trace!( - target: LOG_TARGET, - ?connection_id, - "webrtc cannot reject pending connections", - ); - - debug_assert!(false); - Err(Error::NotSupported("webrtc cannot reject pending connections".to_string())) - } - - fn accept( - &mut self, - connection_id: ConnectionId, - ) -> crate::Result>> { - tracing::trace!( - target: LOG_TARGET, - ?connection_id, - "inbound connection accepted", - ); - - let (peer, source, endpoint) = - self.connections.remove(&connection_id).ok_or_else(|| { - tracing::warn!( - target: LOG_TARGET, - ?connection_id, - "pending connection doens't exist", - ); - - Error::InvalidState - })?; - - let connection = self.opening.remove(&source).ok_or_else(|| { - tracing::warn!( - target: LOG_TARGET, - ?connection_id, - "pending connection doens't exist", - ); - - Error::InvalidState - })?; - - let rtc = connection.on_accept()?; - let (tx, rx) = channel(self.datagram_buffer_size); - let mut protocol_set = self.context.protocol_set(connection_id); - let connection_id = endpoint.connection_id(); - let endpoint_clone = endpoint.clone(); - let executor = self.context.executor.clone(); - let socket = Arc::clone(&self.socket); - let listen_address = self.listen_address; - - self.open.insert(source, ConnectionContext { tx, peer, connection_id }); - - Ok(Box::pin(async move { - // First, notify all protocols about the connection establishment - protocol_set.report_connection_established(peer, endpoint_clone).await?; - - // After protocols are notified, create connection and spawn event loop - let connection = WebRtcConnection::new( - rtc, - peer, - source, - listen_address, - socket, - protocol_set, - endpoint, - rx, - ); - - executor.run(Box::pin(async move { - connection.run_event_loop().await; - })); - - Ok(()) - })) - } - - fn reject(&mut self, connection_id: ConnectionId) -> crate::Result<()> { - tracing::trace!( - target: LOG_TARGET, - ?connection_id, - "inbound connection rejected", - ); - - let (_, source, _) = self.connections.remove(&connection_id).ok_or_else(|| { - tracing::warn!( - target: LOG_TARGET, - ?connection_id, - "pending connection doens't exist", - ); - - Error::InvalidState - })?; - - self.opening - .remove(&source) - .ok_or_else(|| { - tracing::warn!( - target: LOG_TARGET, - ?connection_id, - "pending connection doens't exist", - ); - - Error::InvalidState - }) - .map(|_| ()) - } - - fn open( - &mut self, - _connection_id: ConnectionId, - _addresses: Vec, - ) -> crate::Result<()> { - Ok(()) - } - - fn negotiate(&mut self, _connection_id: ConnectionId) -> crate::Result<()> { - Ok(()) - } - - fn cancel(&mut self, _connection_id: ConnectionId) {} -} - -impl Stream for WebRtcTransport { - type Item = TransportEvent; - - fn poll_next(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll> { - let this = Pin::into_inner(self); - - if let Some(event) = this.pending_events.pop_front() { - return Poll::Ready(Some(event)); - } - - loop { - let mut buf = vec![0u8; 16384]; - let mut read_buf = ReadBuf::new(&mut buf); - - match this.socket.poll_recv_from(cx, &mut read_buf) { - Poll::Pending => break, - Poll::Ready(Err(error)) => { - tracing::info!( - target: LOG_TARGET, - ?error, - "webrtc udp socket closed", - ); - - return Poll::Ready(None); - }, - Poll::Ready(Ok(source)) => { - let nread = read_buf.filled().len(); - buf.truncate(nread); - - match this.on_socket_input(source, buf) { - Ok(false) => {}, - Ok(true) => loop { - match this.poll_connection(&source) { - ConnectionEvent::ConnectionEstablished { peer, endpoint } => { - this.connections.insert( - endpoint.connection_id(), - (peer, source, endpoint.clone()), - ); - - // keep polling the connection until it registers a timeout - this.pending_events.push_back( - TransportEvent::ConnectionEstablished { peer, endpoint }, - ); - }, - ConnectionEvent::ConnectionClosed => { - this.opening.remove(&source); - this.timeouts.remove(&source); - - break; - }, - ConnectionEvent::Timeout { duration } => { - this.timeouts.insert( - source, - Box::pin(async move { Delay::new(duration).await }), - ); - - break; - }, - } - }, - Err(error) => { - tracing::debug!( - target: LOG_TARGET, - ?source, - ?error, - "failed to handle datagram", - ); - }, - } - }, - } - } - - // go over all pending timeouts to see if any of them have expired - // and if any of them have, poll the connection until it registers another timeout - let pending_events = this - .timeouts - .iter_mut() - .filter_map(|(source, mut delay)| match Pin::new(&mut delay).poll(cx) { - Poll::Pending => None, - Poll::Ready(_) => Some(*source), - }) - .collect::>() - .into_iter() - .filter_map(|source| { - let mut pending_event = None; - - loop { - match this.poll_connection(&source) { - ConnectionEvent::ConnectionEstablished { peer, endpoint } => { - this.connections - .insert(endpoint.connection_id(), (peer, source, endpoint.clone())); - - // keep polling the connection until it registers a timeout - pending_event = - Some(TransportEvent::ConnectionEstablished { peer, endpoint }); - }, - ConnectionEvent::ConnectionClosed => { - this.opening.remove(&source); - return None; - }, - ConnectionEvent::Timeout { duration } => { - this.timeouts.insert(source, Box::pin(Delay::new(duration))); - break; - }, - } - } - - pending_event - }) - .collect::>(); - - this.timeouts.retain(|source, _| this.opening.contains_key(source)); - this.pending_events.extend(pending_events); - this.pending_events - .pop_front() - .map_or(Poll::Pending, |event| Poll::Ready(Some(event))) - } -} - -/// Check if the packet received is STUN. -/// -/// Extracted from the STUN RFC 5389 (): -/// All STUN messages MUST start with a 20-byte header followed by zero -/// or more Attributes. The STUN header contains a STUN message type, -/// magic cookie, transaction ID, and message length. -/// -/// ```ignore -/// 0 1 2 3 -/// 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 -/// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ -/// |0 0| STUN Message Type | Message Length | -/// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ -/// | Magic Cookie | -/// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ -/// | | -/// | Transaction ID (96 bits) | -/// | | -/// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ -/// ``` -fn is_stun_packet(bytes: &[u8]) -> bool { - const STUN_MAGIC_COOKIE: [u8; 4] = [0x21, 0x12, 0xA4, 0x42]; - // 20 bytes for the header, then follows attributes. - bytes.len() >= 20 && bytes[0] < 2 && bytes[4..8] == STUN_MAGIC_COOKIE -} diff --git a/client/litep2p/src/transport/webrtc/opening.rs b/client/litep2p/src/transport/webrtc/opening.rs deleted file mode 100644 index 582e6541..00000000 --- a/client/litep2p/src/transport/webrtc/opening.rs +++ /dev/null @@ -1,500 +0,0 @@ -// Copyright 2023-2024 litep2p developers -// -// Permission is hereby granted, free of charge, to any person obtaining a -// copy of this software and associated documentation files (the "Software"), -// to deal in the Software without restriction, including without limitation -// the rights to use, copy, modify, merge, publish, distribute, sublicense, -// and/or sell copies of the Software, and to permit persons to whom the -// Software is furnished to do so, subject to the following conditions: -// -// The above copyright notice and this permission notice shall be included in -// all copies or substantial portions of the Software. -// -// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS -// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, -// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE -// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER -// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING -// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER -// DEALINGS IN THE SOFTWARE. - -//! WebRTC handshaking code for an opening connection. - -use crate::{ - config::Role, - crypto::{dilithium::Keypair, noise::NoiseContext}, - transport::{webrtc::util::WebRtcMessage, Endpoint}, - types::ConnectionId, - Error, PeerId, -}; - -use multiaddr::{multihash::Multihash, Multiaddr, Protocol}; -use str0m::{ - channel::ChannelId, - config::Fingerprint, - net::{DatagramRecv, DatagramSend, Protocol as Str0mProtocol, Receive}, - Event, IceConnectionState, Input, Output, Rtc, -}; - -use std::{net::SocketAddr, time::Instant}; - -/// Logging target for the file. -const LOG_TARGET: &str = "litep2p::webrtc::connection"; - -/// Create Noise prologue. -fn noise_prologue(local_fingerprint: Vec, remote_fingerprint: Vec) -> Vec { - const PREFIX: &[u8] = b"libp2p-webrtc-noise:"; - let mut prologue = - Vec::with_capacity(PREFIX.len() + local_fingerprint.len() + remote_fingerprint.len()); - prologue.extend_from_slice(PREFIX); - prologue.extend_from_slice(&remote_fingerprint); - prologue.extend_from_slice(&local_fingerprint); - - prologue -} - -/// WebRTC connection event. -#[derive(Debug)] -pub enum WebRtcEvent { - /// Register timeout for the connection. - Timeout { - /// Timeout. - timeout: Instant, - }, - - /// Transmit data to remote peer. - Transmit { - /// Destination. - destination: SocketAddr, - - /// Datagram to transmit. - datagram: DatagramSend, - }, - - /// Connection closed. - ConnectionClosed, - - /// Connection established. - ConnectionOpened { - /// Remote peer ID. - peer: PeerId, - - /// Endpoint. - endpoint: Endpoint, - }, -} - -/// Opening WebRTC connection. -/// -/// This object is used to track an opening connection which starts with a Noise handshake. -/// After the handshake is done, this object is destroyed and a new WebRTC connection object -/// is created which implements a normal connection event loop dealing with substreams. -pub struct OpeningWebRtcConnection { - /// WebRTC object - rtc: Rtc, - - /// Connection state. - state: State, - - /// Connection ID. - connection_id: ConnectionId, - - /// Noise channel ID. - noise_channel_id: ChannelId, - - /// Local keypair. - id_keypair: Keypair, - - /// Peer address - peer_address: SocketAddr, - - /// Local address. - local_address: SocketAddr, -} - -/// Connection state. -#[derive(Debug)] -enum State { - /// Connection is poisoned. - Poisoned, - - /// Connection is closed. - Closed, - - /// Connection has been opened. - Opened { - /// Noise context. - context: NoiseContext, - }, - - /// Local Noise handshake has been sent to peer and the connection - /// is waiting for an answer. - HandshakeSent { - /// Noise context. - context: NoiseContext, - }, - - /// Response to local Noise handshake has been received and the connection - /// is being validated by `TransportManager`. - Validating { - /// Noise context. - context: NoiseContext, - }, -} - -impl OpeningWebRtcConnection { - /// Create new [`OpeningWebRtcConnection`]. - pub fn new( - rtc: Rtc, - connection_id: ConnectionId, - noise_channel_id: ChannelId, - id_keypair: Keypair, - peer_address: SocketAddr, - local_address: SocketAddr, - ) -> OpeningWebRtcConnection { - tracing::trace!( - target: LOG_TARGET, - ?connection_id, - ?peer_address, - "new connection opened", - ); - - Self { - rtc, - state: State::Closed, - connection_id, - noise_channel_id, - id_keypair, - peer_address, - local_address, - } - } - - /// Get remote fingerprint to bytes. - fn remote_fingerprint(&mut self) -> Vec { - let fingerprint = self - .rtc - .direct_api() - .remote_dtls_fingerprint() - .expect("fingerprint to exist") - .clone(); - Self::fingerprint_to_bytes(&fingerprint) - } - - /// Get local fingerprint as bytes. - fn local_fingerprint(&mut self) -> Vec { - Self::fingerprint_to_bytes(self.rtc.direct_api().local_dtls_fingerprint()) - } - - /// Convert `Fingerprint` to bytes. - fn fingerprint_to_bytes(fingerprint: &Fingerprint) -> Vec { - const MULTIHASH_SHA256_CODE: u64 = 0x12; - Multihash::wrap(MULTIHASH_SHA256_CODE, &fingerprint.bytes) - .expect("fingerprint's len to be 32 bytes") - .to_bytes() - } - - /// Once a Noise data channel has been opened, even though the light client was the dialer, - /// the WebRTC server will act as the dialer as per the specification. - /// - /// Create the first Noise handshake message and send it to remote peer. - fn on_noise_channel_open(&mut self) -> crate::Result<()> { - tracing::trace!(target: LOG_TARGET, "send initial noise handshake"); - - let State::Opened { mut context } = std::mem::replace(&mut self.state, State::Poisoned) - else { - return Err(Error::InvalidState); - }; - - // create first noise handshake and send it to remote peer - let payload = WebRtcMessage::encode(context.first_message(Role::Dialer)?, None); - - self.rtc - .channel(self.noise_channel_id) - .ok_or(Error::ChannelDoesntExist)? - .write(true, payload.as_slice()) - .map_err(Error::WebRtc)?; - - self.state = State::HandshakeSent { context }; - Ok(()) - } - - /// Handle timeout. - pub fn on_timeout(&mut self) -> crate::Result<()> { - if let Err(error) = self.rtc.handle_input(Input::Timeout(Instant::now())) { - tracing::error!( - target: LOG_TARGET, - ?error, - "failed to handle timeout for `Rtc`" - ); - - self.rtc.disconnect(); - return Err(Error::Disconnected); - } - - Ok(()) - } - - /// Handle Noise handshake response. - /// - /// The message contains remote's peer ID which is used by the `TransportManager` to validate - /// the connection. Note the Noise handshake requires one more messages to be sent by the dialer - /// (us) but the inbound connection must first be verified by the `TransportManager` which will - /// either accept or reject the connection. - /// - /// If the peer is accepted, [`OpeningWebRtcConnection::on_accept()`] is called which creates - /// the final Noise message and sends it to the remote peer, concluding the handshake. - fn on_noise_channel_data(&mut self, data: Vec) -> crate::Result { - tracing::trace!(target: LOG_TARGET, "handle noise handshake reply"); - - let State::HandshakeSent { mut context } = - std::mem::replace(&mut self.state, State::Poisoned) - else { - return Err(Error::InvalidState); - }; - - let message = WebRtcMessage::decode(&data)?.payload.ok_or(Error::InvalidData)?; - let remote_peer_id = context.get_remote_peer_id(&message)?; - - tracing::trace!( - target: LOG_TARGET, - ?remote_peer_id, - "remote reply parsed successfully", - ); - - self.state = State::Validating { context }; - - let remote_fingerprint = self - .rtc - .direct_api() - .remote_dtls_fingerprint() - .expect("fingerprint to exist") - .clone() - .bytes; - - const MULTIHASH_SHA256_CODE: u64 = 0x12; - let certificate = Multihash::wrap(MULTIHASH_SHA256_CODE, &remote_fingerprint) - .expect("fingerprint's len to be 32 bytes"); - - let address = Multiaddr::empty() - .with(Protocol::from(self.peer_address.ip())) - .with(Protocol::Udp(self.peer_address.port())) - .with(Protocol::WebRTC) - .with(Protocol::Certhash(certificate)) - .with(Protocol::P2p(remote_peer_id.into())); - - Ok(WebRtcEvent::ConnectionOpened { - peer: remote_peer_id, - endpoint: Endpoint::listener(address, self.connection_id), - }) - } - - /// Accept connection by sending the final Noise handshake message - /// and return the `Rtc` object for further use. - pub fn on_accept(mut self) -> crate::Result { - tracing::trace!(target: LOG_TARGET, "accept webrtc connection"); - - let State::Validating { mut context } = std::mem::replace(&mut self.state, State::Poisoned) - else { - return Err(Error::InvalidState); - }; - - // create second noise handshake message and send it to remote - let payload = WebRtcMessage::encode(context.second_message()?, None); - - let mut channel = - self.rtc.channel(self.noise_channel_id).ok_or(Error::ChannelDoesntExist)?; - - channel.write(true, payload.as_slice()).map_err(Error::WebRtc)?; - self.rtc.direct_api().close_data_channel(self.noise_channel_id); - - Ok(self.rtc) - } - - /// Handle input from peer. - pub fn on_input(&mut self, buffer: DatagramRecv) -> crate::Result<()> { - tracing::trace!( - target: LOG_TARGET, - peer = ?self.peer_address, - "handle input from peer", - ); - - let message = Input::Receive( - Instant::now(), - Receive { - source: self.peer_address, - proto: Str0mProtocol::Udp, - destination: self.local_address, - contents: buffer, - }, - ); - - match self.rtc.accepts(&message) { - true => self.rtc.handle_input(message).map_err(|error| { - tracing::debug!(target: LOG_TARGET, source = ?self.peer_address, ?error, "failed to handle data"); - Error::InputRejected - }), - false => { - tracing::warn!( - target: LOG_TARGET, - peer = ?self.peer_address, - "input rejected", - ); - Err(Error::InputRejected) - } - } - } - - /// Progress the state of [`OpeningWebRtcConnection`]. - pub fn poll_process(&mut self) -> WebRtcEvent { - if !self.rtc.is_alive() { - tracing::debug!( - target: LOG_TARGET, - "`Rtc` is not alive, closing `WebRtcConnection`" - ); - - return WebRtcEvent::ConnectionClosed; - } - - loop { - let output = match self.rtc.poll_output() { - Ok(output) => output, - Err(error) => { - tracing::debug!( - target: LOG_TARGET, - connection_id = ?self.connection_id, - ?error, - "`WebRtcConnection::poll_process()` failed", - ); - - return WebRtcEvent::ConnectionClosed; - }, - }; - - match output { - Output::Transmit(transmit) => { - tracing::trace!( - target: LOG_TARGET, - "transmit data", - ); - - return WebRtcEvent::Transmit { - destination: transmit.destination, - datagram: transmit.contents, - }; - }, - Output::Timeout(timeout) => return WebRtcEvent::Timeout { timeout }, - Output::Event(e) => match e { - Event::IceConnectionStateChange(v) => - if v == IceConnectionState::Disconnected { - tracing::trace!(target: LOG_TARGET, "ice connection closed"); - return WebRtcEvent::ConnectionClosed; - }, - Event::ChannelOpen(channel_id, name) => { - tracing::trace!( - target: LOG_TARGET, - connection_id = ?self.connection_id, - ?channel_id, - ?name, - "channel opened", - ); - - if channel_id != self.noise_channel_id { - tracing::warn!( - target: LOG_TARGET, - connection_id = ?self.connection_id, - ?channel_id, - "ignoring opened channel", - ); - continue; - } - - if let Err(error) = self.on_noise_channel_open() { - tracing::debug!( - target: LOG_TARGET, - connection_id = ?self.connection_id, - ?error, - "noise channel open failed", - ); - return WebRtcEvent::ConnectionClosed; - } - }, - Event::ChannelData(data) => { - tracing::trace!( - target: LOG_TARGET, - "data received over channel", - ); - - if data.id != self.noise_channel_id { - tracing::warn!( - target: LOG_TARGET, - channel_id = ?data.id, - connection_id = ?self.connection_id, - "ignoring data from channel", - ); - continue; - } - - match self.on_noise_channel_data(data.data) { - Ok(event) => return event, - Err(error) => { - tracing::debug!( - target: LOG_TARGET, - connection_id = ?self.connection_id, - ?error, - "noise channel data handling failed", - ); - return WebRtcEvent::ConnectionClosed; - }, - } - }, - Event::ChannelClose(channel_id) => { - tracing::debug!(target: LOG_TARGET, ?channel_id, "channel closed"); - }, - Event::Connected => match std::mem::replace(&mut self.state, State::Poisoned) { - State::Closed => { - let remote_fingerprint = self.remote_fingerprint(); - let local_fingerprint = self.local_fingerprint(); - - let context = match NoiseContext::with_prologue( - &self.id_keypair, - noise_prologue(local_fingerprint, remote_fingerprint), - ) { - Ok(context) => context, - Err(err) => { - tracing::error!( - target: LOG_TARGET, - peer = ?self.peer_address, - "NoiseContext failed with error {err}", - ); - - return WebRtcEvent::ConnectionClosed; - }, - }; - - tracing::debug!( - target: LOG_TARGET, - peer = ?self.peer_address, - "connection opened", - ); - - self.state = State::Opened { context }; - }, - state => { - tracing::debug!( - target: LOG_TARGET, - peer = ?self.peer_address, - ?state, - "invalid state for connection" - ); - return WebRtcEvent::ConnectionClosed; - }, - }, - event => { - tracing::warn!(target: LOG_TARGET, ?event, "unhandled event"); - }, - }, - } - } - } -} diff --git a/client/litep2p/src/transport/webrtc/substream.rs b/client/litep2p/src/transport/webrtc/substream.rs deleted file mode 100644 index 260eeb21..00000000 --- a/client/litep2p/src/transport/webrtc/substream.rs +++ /dev/null @@ -1,1362 +0,0 @@ -// Copyright 2024 litep2p developers -// -// Permission is hereby granted, free of charge, to any person obtaining a -// copy of this software and associated documentation files (the "Software"), -// to deal in the Software without restriction, including without limitation -// the rights to use, copy, modify, merge, publish, distribute, sublicense, -// and/or sell copies of the Software, and to permit persons to whom the -// Software is furnished to do so, subject to the following conditions: -// -// The above copyright notice and this permission notice shall be included in -// all copies or substantial portions of the Software. -// -// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS -// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, -// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE -// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER -// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING -// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER -// DEALINGS IN THE SOFTWARE. - -use crate::{ - transport::webrtc::{schema::webrtc::message::Flag, util::WebRtcMessage}, - Error, -}; - -use bytes::{Buf, BufMut, BytesMut}; -use futures::{task::AtomicWaker, Future, Stream}; -use parking_lot::Mutex; -use tokio::sync::mpsc::{channel, Receiver, Sender}; -use tokio_util::sync::PollSender; - -use std::{ - pin::Pin, - sync::Arc, - task::{Context, Poll}, - time::Duration, -}; - -/// Maximum frame size. -const MAX_FRAME_SIZE: usize = 16384; - -/// Timeout for waiting on FIN_ACK after sending FIN. -/// Matches go-libp2p's 5 second stream close timeout. -const FIN_ACK_TIMEOUT: Duration = Duration::from_secs(5); - -/// Substream event. -#[derive(Debug, PartialEq, Eq)] -pub enum Event { - /// Receiver closed. - RecvClosed, - - /// Send/receive message with optional flag. - Message { payload: Vec, flag: Option }, -} - -/// Substream stream. -#[derive(Debug, Clone, Copy)] -enum State { - /// Substream is fully open. - Open, - - /// Remote is no longer interested in receiving anything. - SendClosed, - - /// Shutdown initiated, flushing pending data before sending FIN. - Closing, - - /// We sent FIN, waiting for FIN_ACK. - FinSent, - - /// We received FIN_ACK, write half is closed. - FinAcked, -} - -/// Channel-backed substream. Must be owned and polled by exactly one task at a time. -pub struct Substream { - /// Substream state. - state: Arc>, - - /// Read buffer. - read_buffer: BytesMut, - - /// TX channel for sending messages to `peer`, wrapped in a [`PollSender`] - /// so that backpressure is driven by the caller's waker. - tx: PollSender, - - /// RX channel for receiving messages from `peer`. - rx: Receiver, - - /// Waker to notify when shutdown completes (FIN_ACK received). - shutdown_waker: Arc, - - /// Waker to notify when write state changes (e.g., STOP_SENDING received). - write_waker: Arc, - - /// Timeout for waiting on FIN_ACK after sending FIN. - /// Boxed to maintain Unpin for Substream while allowing the Sleep to be polled. - fin_ack_timeout: Option>>, -} - -impl Substream { - /// Create new [`Substream`]. - pub fn new() -> (Self, SubstreamHandle) { - let (outbound_tx, outbound_rx) = channel(256); - let (inbound_tx, inbound_rx) = channel(256); - let state = Arc::new(Mutex::new(State::Open)); - let shutdown_waker = Arc::new(AtomicWaker::new()); - let write_waker = Arc::new(AtomicWaker::new()); - - let handle = SubstreamHandle { - inbound_tx, - outbound_tx: outbound_tx.clone(), - rx: outbound_rx, - state: Arc::clone(&state), - shutdown_waker: Arc::clone(&shutdown_waker), - write_waker: Arc::clone(&write_waker), - read_closed: std::sync::atomic::AtomicBool::new(false), - }; - - ( - Self { - state, - tx: PollSender::new(outbound_tx), - rx: inbound_rx, - read_buffer: BytesMut::new(), - shutdown_waker, - write_waker, - fin_ack_timeout: None, - }, - handle, - ) - } -} - -/// Substream handle that is given to the WebRTC transport backend. -pub struct SubstreamHandle { - state: Arc>, - - /// TX channel for sending inbound messages from `peer` to the associated `Substream`. - inbound_tx: Sender, - - /// TX channel for sending outbound messages to `peer` (e.g., FIN_ACK responses). - outbound_tx: Sender, - - /// RX channel for receiving outbound messages to `peer` from the associated `Substream`. - rx: Receiver, - - /// Waker to notify when shutdown completes (FIN_ACK received). - shutdown_waker: Arc, - - /// Waker to notify when write state changes (e.g., STOP_SENDING received). - write_waker: Arc, - - /// Whether we've already sent RecvClosed to the inbound channel. - /// Prevents duplicate RecvClosed events if multiple FIN messages are received. - read_closed: std::sync::atomic::AtomicBool, -} - -impl SubstreamHandle { - /// Handle message received from a remote peer. - /// - /// Process an incoming WebRTC message, handling any payload and flags. - /// - /// Payload is processed first (if present), then flags are handled. This ensures that - /// a FIN message containing final data will deliver that data before signaling closure. - pub async fn on_message(&self, message: WebRtcMessage) -> crate::Result<()> { - // Process payload first, before handling flags. - // This ensures that if a FIN message contains data, we deliver it before closing. - if let Some(payload) = message.payload { - if !payload.is_empty() { - self.inbound_tx.send(Event::Message { payload, flag: None }).await?; - } - } - - // Now handle flags - if let Some(flag) = message.flag { - match flag { - Flag::Fin => { - // Guard against duplicate FIN messages - only send RecvClosed once - if self.read_closed.swap(true, std::sync::atomic::Ordering::SeqCst) { - // Already processed FIN, ignore duplicate - tracing::debug!( - target: "litep2p::webrtc::substream", - "received duplicate FIN, ignoring" - ); - return Ok(()); - } - - // Received FIN from remote, close our read half - self.inbound_tx.send(Event::RecvClosed).await?; - - // Send FIN_ACK back to remote using try_send to avoid blocking. - // If the channel is full, the remote will timeout waiting for FIN_ACK - // and handle it gracefully. This prevents deadlock if the outbound - // channel is blocked due to backpressure. - if let Err(e) = self - .outbound_tx - .try_send(Event::Message { payload: vec![], flag: Some(Flag::FinAck) }) - { - tracing::warn!( - target: "litep2p::webrtc::substream", - ?e, - "failed to send FIN_ACK, remote will timeout" - ); - } - return Ok(()); - }, - Flag::FinAck => { - // Received FIN_ACK, we can now fully close our write half - let mut state = self.state.lock(); - if matches!(*state, State::FinSent) { - *state = State::FinAcked; - // Wake up any task waiting on shutdown - self.shutdown_waker.wake(); - } else { - tracing::warn!( - target: "litep2p::webrtc::substream", - ?state, - "received FIN_ACK in unexpected state, ignoring" - ); - } - return Ok(()); - }, - Flag::StopSending => { - *self.state.lock() = State::SendClosed; - // Wake any blocked poll_write so it can see the state change - self.write_waker.wake(); - return Ok(()); - }, - Flag::ResetStream => { - // RESET_STREAM abruptly terminates both sides of the stream - // (matching go-libp2p behavior) - // Close the read side - let _ = self.inbound_tx.try_send(Event::RecvClosed); - // Close the write side - *self.state.lock() = State::SendClosed; - // Wake any blocked poll_write so it can see the state change - self.write_waker.wake(); - return Err(Error::ConnectionClosed); - }, - } - } - - Ok(()) - } -} - -impl Stream for SubstreamHandle { - type Item = Event; - - fn poll_next(mut self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll> { - // First, try to drain any pending outbound messages - match self.rx.poll_recv(cx) { - Poll::Ready(Some(event)) => return Poll::Ready(Some(event)), - Poll::Ready(None) => { - // Outbound channel closed (all senders dropped) - return Poll::Ready(None); - }, - Poll::Pending => { - // No messages available, check if we should signal closure - }, - } - - // Check if Substream has been dropped (inbound channel closed) - // When Substream is dropped, there will be no more outbound messages - // Since we've already tried to recv above and got Pending, we know the queue is empty - // Therefore, it's safe to signal closure - if self.inbound_tx.is_closed() { - return Poll::Ready(None); - } - - Poll::Pending - } -} - -impl tokio::io::AsyncRead for Substream { - fn poll_read( - mut self: Pin<&mut Self>, - cx: &mut Context<'_>, - buf: &mut tokio::io::ReadBuf<'_>, - ) -> Poll> { - // if there are any remaining bytes from a previous read, consume them first - if self.read_buffer.remaining() > 0 { - let num_bytes = std::cmp::min(self.read_buffer.remaining(), buf.remaining()); - - buf.put_slice(&self.read_buffer[..num_bytes]); - self.read_buffer.advance(num_bytes); - - // TODO: optimize by trying to read more data from substream and not exiting early - return Poll::Ready(Ok(())); - } - - match futures::ready!(self.rx.poll_recv(cx)) { - None | Some(Event::RecvClosed) => - Poll::Ready(Err(std::io::ErrorKind::BrokenPipe.into())), - Some(Event::Message { payload, flag: _ }) => { - if payload.len() > MAX_FRAME_SIZE { - return Poll::Ready(Err(std::io::ErrorKind::PermissionDenied.into())); - } - - match buf.remaining() >= payload.len() { - true => buf.put_slice(&payload), - false => { - let remaining = buf.remaining(); - buf.put_slice(&payload[..remaining]); - self.read_buffer.put_slice(&payload[remaining..]); - }, - } - - Poll::Ready(Ok(())) - }, - } - } -} - -impl tokio::io::AsyncWrite for Substream { - fn poll_write( - mut self: Pin<&mut Self>, - cx: &mut Context<'_>, - buf: &[u8], - ) -> Poll> { - // Register waker so we get notified on state changes (e.g., STOP_SENDING) - self.write_waker.register(cx.waker()); - - // Reject writes if we're closing or closed - match *self.state.lock() { - State::SendClosed | State::Closing | State::FinSent | State::FinAcked => { - return Poll::Ready(Err(std::io::ErrorKind::BrokenPipe.into())); - }, - State::Open => {}, - } - - match futures::ready!(self.tx.poll_reserve(cx)) { - Ok(()) => {}, - Err(_) => return Poll::Ready(Err(std::io::ErrorKind::BrokenPipe.into())), - }; - - // Re-check state after poll_reserve - it may have changed while we were waiting - match *self.state.lock() { - State::SendClosed | State::Closing | State::FinSent | State::FinAcked => { - return Poll::Ready(Err(std::io::ErrorKind::BrokenPipe.into())); - }, - State::Open => {}, - } - - let num_bytes = std::cmp::min(MAX_FRAME_SIZE, buf.len()); - let frame = buf[..num_bytes].to_vec(); - - match self.tx.send_item(Event::Message { payload: frame, flag: None }) { - Ok(()) => Poll::Ready(Ok(num_bytes)), - Err(_) => Poll::Ready(Err(std::io::ErrorKind::BrokenPipe.into())), - } - } - - fn poll_flush(self: Pin<&mut Self>, _cx: &mut Context<'_>) -> Poll> { - Poll::Ready(Ok(())) - } - - fn poll_shutdown( - mut self: Pin<&mut Self>, - cx: &mut Context<'_>, - ) -> Poll> { - // State machine for proper shutdown: - // 1. Transition to Closing (stops accepting new writes) - // 2. Flush pending data - // 3. Send FIN flag - // 4. Transition to FinSent - // 5. Wait for FIN_ACK - // 6. Transition to FinAcked and complete - - let current_state = *self.state.lock(); - - match current_state { - // Already received FIN_ACK, shutdown complete - State::FinAcked => return Poll::Ready(Ok(())), - - // Sent FIN, waiting for FIN_ACK - poll timeout and return Pending - State::FinSent => { - // Register waker FIRST to avoid race condition with on_message - self.shutdown_waker.register(cx.waker()); - - // Re-check state after waker registration in case FIN_ACK arrived - // between the initial state check and waker registration - if matches!(*self.state.lock(), State::FinAcked) { - return Poll::Ready(Ok(())); - } - - // Poll the timeout - if it fires, force shutdown completion - if let Some(timeout) = self.fin_ack_timeout.as_mut() { - if timeout.as_mut().poll(cx).is_ready() { - tracing::debug!( - target: "litep2p::webrtc::substream", - "FIN_ACK timeout exceeded, forcing shutdown completion" - ); - *self.state.lock() = State::FinAcked; - return Poll::Ready(Ok(())); - } - } - - return Poll::Pending; - }, - - // First call to shutdown - transition to Closing - State::Open => { - *self.state.lock() = State::Closing; - }, - - State::Closing => { - // Already in closing state, continue with shutdown process. - // Guard against duplicate FIN sends: if timeout is already set, we've - // already sent FIN and are waiting for FIN_ACK. This shouldn't happen - // with correct AsyncWrite usage (&mut self), but provides defense in depth. - if self.fin_ack_timeout.is_some() { - self.shutdown_waker.register(cx.waker()); - return Poll::Pending; - } - }, - - State::SendClosed => { - // Remote closed send, we can still send FIN - }, - } - - // Flush any pending data - // Note: Currently poll_flush is a no-op, but the channel backpressure - // provides implicit flushing since we wait for poll_reserve below - futures::ready!(self.as_mut().poll_flush(cx))?; - - // Reserve space to send FIN - match futures::ready!(self.tx.poll_reserve(cx)) { - Ok(()) => {}, - Err(_) => return Poll::Ready(Err(std::io::ErrorKind::BrokenPipe.into())), - }; - - // Send message with FIN flag - match self.tx.send_item(Event::Message { payload: vec![], flag: Some(Flag::Fin) }) { - Ok(()) => { - // Race condition mitigation strategy: - // 1. Transition to FinSent FIRST so on_message can recognize FIN_ACK (if waker - // registered first, FIN_ACK would be ignored since state != FinSent) - // 2. Register waker so we'll be notified on future FIN_ACK arrivals - // 3. Re-check state to catch FIN_ACK that arrived between steps 1 and 2 (wake() - // called before waker registered has no effect, but state changed) - *self.state.lock() = State::FinSent; - self.shutdown_waker.register(cx.waker()); - if matches!(*self.state.lock(), State::FinAcked) { - return Poll::Ready(Ok(())); - } - - // Initialize the timeout for FIN_ACK - let mut timeout = Box::pin(tokio::time::sleep(FIN_ACK_TIMEOUT)); - // Poll the timeout once to register it with tokio's timer - // This ensures we'll be woken when it expires - let _ = timeout.as_mut().poll(cx); - self.fin_ack_timeout = Some(timeout); - - Poll::Pending - }, - Err(_) => Poll::Ready(Err(std::io::ErrorKind::BrokenPipe.into())), - } - } -} - -#[cfg(test)] -mod tests { - use super::*; - use futures::StreamExt; - use tokio::io::{AsyncRead, AsyncReadExt, AsyncWrite, AsyncWriteExt, ReadBuf}; - - #[tokio::test] - async fn write_small_frame() { - let (mut substream, mut handle) = Substream::new(); - - substream.write_all(&vec![0u8; 1337]).await.unwrap(); - - assert_eq!( - handle.next().await, - Some(Event::Message { payload: vec![0u8; 1337], flag: None }) - ); - - futures::future::poll_fn(|cx| match handle.poll_next_unpin(cx) { - Poll::Pending => Poll::Ready(()), - Poll::Ready(_) => panic!("invalid event"), - }) - .await; - } - - #[tokio::test] - async fn write_large_frame() { - let (mut substream, mut handle) = Substream::new(); - - substream.write_all(&vec![0u8; (2 * MAX_FRAME_SIZE) + 1]).await.unwrap(); - - assert_eq!( - handle.rx.recv().await, - Some(Event::Message { payload: vec![0u8; MAX_FRAME_SIZE], flag: None }) - ); - assert_eq!( - handle.rx.recv().await, - Some(Event::Message { payload: vec![0u8; MAX_FRAME_SIZE], flag: None }) - ); - assert_eq!( - handle.rx.recv().await, - Some(Event::Message { payload: vec![0u8; 1], flag: None }) - ); - - futures::future::poll_fn(|cx| match handle.poll_next_unpin(cx) { - Poll::Pending => Poll::Ready(()), - Poll::Ready(_) => panic!("invalid event"), - }) - .await; - } - - #[tokio::test] - async fn try_to_write_to_closed_substream() { - let (mut substream, handle) = Substream::new(); - *handle.state.lock() = State::SendClosed; - - match substream.write_all(&vec![0u8; 1337]).await { - Err(error) => assert_eq!(error.kind(), std::io::ErrorKind::BrokenPipe), - _ => panic!("invalid event"), - } - } - - #[tokio::test] - async fn substream_shutdown() { - let (mut substream, mut handle) = Substream::new(); - - substream.write_all(&vec![1u8; 1337]).await.unwrap(); - - // Spawn shutdown since it waits for FIN_ACK - let shutdown_task = tokio::spawn(async move { - substream.shutdown().await.unwrap(); - }); - - assert_eq!( - handle.next().await, - Some(Event::Message { payload: vec![1u8; 1337], flag: None }) - ); - // After shutdown, should send FIN flag - assert_eq!( - handle.next().await, - Some(Event::Message { payload: vec![], flag: Some(Flag::Fin) }) - ); - - // Send FIN_ACK to complete shutdown - handle - .on_message(WebRtcMessage { payload: None, flag: Some(Flag::FinAck) }) - .await - .unwrap(); - - shutdown_task.await.unwrap(); - } - - #[tokio::test] - async fn try_to_read_from_closed_substream() { - let (mut substream, handle) = Substream::new(); - handle - .on_message(WebRtcMessage { payload: None, flag: Some(Flag::Fin) }) - .await - .unwrap(); - - match substream.read(&mut vec![0u8; 256]).await { - Err(error) => assert_eq!(error.kind(), std::io::ErrorKind::BrokenPipe), - _ => panic!("invalid event"), - } - } - - #[tokio::test] - async fn read_small_frame() { - let (mut substream, handle) = Substream::new(); - handle - .inbound_tx - .send(Event::Message { payload: vec![1u8; 256], flag: None }) - .await - .unwrap(); - - let mut buf = vec![0u8; 2048]; - - match substream.read(&mut buf).await { - Ok(nread) => { - assert_eq!(nread, 256); - assert_eq!(buf[..nread], vec![1u8; 256]); - }, - Err(error) => panic!("invalid event: {error:?}"), - } - - let mut read_buf = ReadBuf::new(&mut buf); - futures::future::poll_fn(|cx| { - match Pin::new(&mut substream).poll_read(cx, &mut read_buf) { - Poll::Pending => Poll::Ready(()), - _ => panic!("invalid event"), - } - }) - .await; - } - - #[tokio::test] - async fn read_small_frame_in_two_reads() { - let (mut substream, handle) = Substream::new(); - let mut first = vec![1u8; 256]; - first.extend_from_slice(&vec![2u8; 256]); - - handle - .inbound_tx - .send(Event::Message { payload: first, flag: None }) - .await - .unwrap(); - - let mut buf = vec![0u8; 256]; - - match substream.read(&mut buf).await { - Ok(nread) => { - assert_eq!(nread, 256); - assert_eq!(buf[..nread], vec![1u8; 256]); - }, - Err(error) => panic!("invalid event: {error:?}"), - } - - match substream.read(&mut buf).await { - Ok(nread) => { - assert_eq!(nread, 256); - assert_eq!(buf[..nread], vec![2u8; 256]); - }, - Err(error) => panic!("invalid event: {error:?}"), - } - - let mut read_buf = ReadBuf::new(&mut buf); - futures::future::poll_fn(|cx| { - match Pin::new(&mut substream).poll_read(cx, &mut read_buf) { - Poll::Pending => Poll::Ready(()), - _ => panic!("invalid event"), - } - }) - .await; - } - - #[tokio::test] - async fn read_frames() { - let (mut substream, handle) = Substream::new(); - let mut first = vec![1u8; 256]; - first.extend_from_slice(&vec![2u8; 256]); - - handle - .inbound_tx - .send(Event::Message { payload: first, flag: None }) - .await - .unwrap(); - handle - .inbound_tx - .send(Event::Message { payload: vec![4u8; 2048], flag: None }) - .await - .unwrap(); - - let mut buf = vec![0u8; 256]; - - match substream.read(&mut buf).await { - Ok(nread) => { - assert_eq!(nread, 256); - assert_eq!(buf[..nread], vec![1u8; 256]); - }, - Err(error) => panic!("invalid event: {error:?}"), - } - - let mut buf = vec![0u8; 128]; - - match substream.read(&mut buf).await { - Ok(nread) => { - assert_eq!(nread, 128); - assert_eq!(buf[..nread], vec![2u8; 128]); - }, - Err(error) => panic!("invalid event: {error:?}"), - } - - let mut buf = vec![0u8; 128]; - - match substream.read(&mut buf).await { - Ok(nread) => { - assert_eq!(nread, 128); - assert_eq!(buf[..nread], vec![2u8; 128]); - }, - Err(error) => panic!("invalid event: {error:?}"), - } - - let mut buf = vec![0u8; MAX_FRAME_SIZE]; - - match substream.read(&mut buf).await { - Ok(nread) => { - assert_eq!(nread, 2048); - assert_eq!(buf[..nread], vec![4u8; 2048]); - }, - Err(error) => panic!("invalid event: {error:?}"), - } - - let mut read_buf = ReadBuf::new(&mut buf); - futures::future::poll_fn(|cx| { - match Pin::new(&mut substream).poll_read(cx, &mut read_buf) { - Poll::Pending => Poll::Ready(()), - _ => panic!("invalid event"), - } - }) - .await; - } - - #[tokio::test] - async fn backpressure_works() { - let (mut substream, _handle) = Substream::new(); - - // use all available bandwidth which by default is `256 * MAX_FRAME_SIZE`, - for _ in 0..128 { - substream.write_all(&vec![0u8; 2 * MAX_FRAME_SIZE]).await.unwrap(); - } - - // try to write one more byte but since all available bandwidth - // is taken the call will block - futures::future::poll_fn(|cx| match Pin::new(&mut substream).poll_write(cx, &[0u8; 1]) { - Poll::Pending => Poll::Ready(()), - _ => panic!("invalid event"), - }) - .await; - } - - #[tokio::test] - async fn backpressure_released_wakes_blocked_writer() { - use tokio::time::{sleep, timeout, Duration}; - - let (mut substream, mut handle) = Substream::new(); - - // Fill the channel to capacity, same pattern as `backpressure_works`. - for _ in 0..128 { - substream.write_all(&vec![0u8; 2 * MAX_FRAME_SIZE]).await.unwrap(); - } - - // Spawn a writer task that will try to write once more. This should initially block - // because the channel is full and rely on the AtomicWaker to be woken later. - let writer = tokio::spawn(async move { - substream - .write_all(&vec![1u8; MAX_FRAME_SIZE]) - .await - .expect("write should eventually succeed"); - }); - - // Give the writer a short moment to reach the blocked (Pending) state. - sleep(Duration::from_millis(10)).await; - assert!(!writer.is_finished(), "writer should be blocked by backpressure"); - - // Now consume a single message from the receiving side. This will: - // - free capacity in the channel - // - call `write_waker.wake()` from `poll_next` - // - // That wake must cause the blocked writer to be polled again and complete its write. - let _ = handle.next().await.expect("expected at least one outbound message"); - - // The writer should now complete in a timely fashion, proving that: - // - registering the waker before `try_reserve` works (no lost wakeup) - // - the wake from `poll_next` correctly unblocks the writer. - timeout(Duration::from_secs(1), writer) - .await - .expect("writer task did not complete after capacity was freed") - .expect("writer task panicked"); - } - - #[tokio::test] - async fn fin_flag_sent_on_shutdown() { - let (mut substream, mut handle) = Substream::new(); - - // Spawn shutdown since it waits for FIN_ACK - let shutdown_task = tokio::spawn(async move { - substream.shutdown().await.unwrap(); - }); - - // Should receive FIN flag - assert_eq!( - handle.next().await, - Some(Event::Message { payload: vec![], flag: Some(Flag::Fin) }) - ); - - // Verify state is FinSent - assert!(matches!(*handle.state.lock(), State::FinSent)); - - // Send FIN_ACK to complete shutdown cleanly (avoids waiting for timeout) - handle - .on_message(WebRtcMessage { payload: None, flag: Some(Flag::FinAck) }) - .await - .unwrap(); - - // Wait for shutdown to complete - shutdown_task.await.unwrap(); - } - - #[tokio::test] - async fn fin_ack_response_on_receiving_fin() { - let (mut substream, mut handle) = Substream::new(); - - // Spawn task to consume inbound events sent to the substream - let consumer_task = tokio::spawn(async move { - // Substream should receive RecvClosed - let mut buf = vec![0u8; 1024]; - match substream.read(&mut buf).await { - Err(e) if e.kind() == std::io::ErrorKind::BrokenPipe => { - // Expected - read half closed - }, - other => panic!("Unexpected result: {:?}", other), - } - }); - - // Simulate receiving FIN from remote - handle - .on_message(WebRtcMessage { payload: None, flag: Some(Flag::Fin) }) - .await - .unwrap(); - - // Wait for consumer task to complete - consumer_task.await.unwrap(); - - // Verify FIN_ACK was sent outbound to network - assert_eq!( - handle.next().await, - Some(Event::Message { payload: vec![], flag: Some(Flag::FinAck) }) - ); - } - - #[tokio::test] - async fn fin_ack_received_transitions_to_fin_acked() { - let (mut substream, handle) = Substream::new(); - - // Spawn shutdown since it waits for FIN_ACK - let shutdown_task = tokio::spawn(async move { - substream.shutdown().await.unwrap(); - }); - - // Wait a bit for FIN to be sent - tokio::task::yield_now().await; - - // Verify we're in FinSent state - assert!(matches!(*handle.state.lock(), State::FinSent)); - - // Simulate receiving FIN_ACK from remote - handle - .on_message(WebRtcMessage { payload: None, flag: Some(Flag::FinAck) }) - .await - .unwrap(); - - // Should transition to FinAcked - assert!(matches!(*handle.state.lock(), State::FinAcked)); - - // Shutdown should now complete - shutdown_task.await.unwrap(); - } - - #[tokio::test] - async fn full_fin_handshake() { - let (mut substream, mut handle) = Substream::new(); - - // Write some data - substream.write_all(&vec![1u8; 100]).await.unwrap(); - - // Spawn shutdown in background since it will wait for FIN_ACK - let shutdown_task = tokio::spawn(async move { - substream.shutdown().await.unwrap(); - }); - - // Verify data was sent - assert_eq!( - handle.next().await, - Some(Event::Message { payload: vec![1u8; 100], flag: None }) - ); - - // Verify FIN was sent - assert_eq!( - handle.next().await, - Some(Event::Message { payload: vec![], flag: Some(Flag::Fin) }) - ); - - // Simulate receiving FIN_ACK - handle - .on_message(WebRtcMessage { payload: None, flag: Some(Flag::FinAck) }) - .await - .unwrap(); - - // Should be in FinAcked state - assert!(matches!(*handle.state.lock(), State::FinAcked)); - - // Shutdown should now complete - shutdown_task.await.unwrap(); - } - - #[tokio::test] - async fn stop_sending_flag_closes_send_half() { - let (mut substream, handle) = Substream::new(); - - // Simulate receiving STOP_SENDING - handle - .on_message(WebRtcMessage { payload: None, flag: Some(Flag::StopSending) }) - .await - .unwrap(); - - // Should transition to SendClosed - assert!(matches!(*handle.state.lock(), State::SendClosed)); - - // Attempting to write should fail - match substream.write_all(&vec![0u8; 100]).await { - Err(error) => assert_eq!(error.kind(), std::io::ErrorKind::BrokenPipe), - _ => panic!("write should have failed"), - } - } - - #[tokio::test] - async fn reset_stream_flag_closes_both_sides() { - use tokio::io::AsyncWriteExt; - let (mut substream, handle) = Substream::new(); - - // Simulate receiving RESET_STREAM - let result = handle - .on_message(WebRtcMessage { payload: None, flag: Some(Flag::ResetStream) }) - .await; - - // Should return connection closed error - assert!(matches!(result, Err(Error::ConnectionClosed))); - - // Write side should be closed (state = SendClosed) - assert!(matches!(*handle.state.lock(), State::SendClosed)); - - // Attempting to write should fail - match substream.write_all(&vec![0u8; 100]).await { - Err(error) => assert_eq!(error.kind(), std::io::ErrorKind::BrokenPipe), - _ => panic!("write should have failed"), - } - - // Read side should also be closed (RecvClosed event was sent) - // The substream's rx channel should have RecvClosed - assert!(matches!(substream.rx.try_recv(), Ok(Event::RecvClosed))); - } - - #[tokio::test] - async fn fin_ack_does_not_trigger_other_flag() { - let (mut substream, handle) = Substream::new(); - - // Spawn shutdown since it waits for FIN_ACK - let shutdown_task = tokio::spawn(async move { - substream.shutdown().await.unwrap(); - }); - - // Wait a bit for FIN to be sent - tokio::task::yield_now().await; - - // Verify we're in FinSent state - assert!(matches!(*handle.state.lock(), State::FinSent)); - - // Now simulate receiving FIN_ACK (value = 3) - // This should NOT trigger STOP_SENDING (value = 1) or RESET_STREAM (value = 2) - // even though 3 & 1 == 1 and 3 & 2 == 2 - handle - .on_message(WebRtcMessage { payload: None, flag: Some(Flag::FinAck) }) - .await - .unwrap(); - - // Should transition to FinAcked, not SendClosed - assert!(matches!(*handle.state.lock(), State::FinAcked)); - - // Shutdown should complete - shutdown_task.await.unwrap(); - - // Writing should still work (not closed by STOP_SENDING) - // Note: We already sent FIN, so write won't actually work, but the state check happens - // first - } - - #[tokio::test] - async fn flags_are_mutually_exclusive() { - let (_substream, handle) = Substream::new(); - - // Test that STOP_SENDING (1) is handled correctly - handle - .on_message(WebRtcMessage { payload: None, flag: Some(Flag::StopSending) }) - .await - .unwrap(); - - assert!(matches!(*handle.state.lock(), State::SendClosed)); - - // Create a new substream for RESET_STREAM test - let (_substream2, handle2) = Substream::new(); - - // Test that RESET_STREAM (2) is handled correctly - let result = handle2 - .on_message(WebRtcMessage { payload: None, flag: Some(Flag::ResetStream) }) - .await; - - assert!(matches!(result, Err(Error::ConnectionClosed))); - - // Create a new substream for FIN test - let (mut substream3, handle3) = Substream::new(); - - // Spawn shutdown since it waits for FIN_ACK - let shutdown_task3 = tokio::spawn(async move { - substream3.shutdown().await.unwrap(); - }); - - // Wait a bit for FIN to be sent - tokio::task::yield_now().await; - - // Test that FIN_ACK (3) is handled correctly - handle3 - .on_message(WebRtcMessage { payload: None, flag: Some(Flag::FinAck) }) - .await - .unwrap(); - - assert!(matches!(*handle3.state.lock(), State::FinAcked)); - - // Shutdown should complete - shutdown_task3.await.unwrap(); - } - - #[tokio::test] - async fn stop_sending_wakes_blocked_writer() { - use tokio::io::AsyncWriteExt; - let (mut substream, handle) = Substream::new(); - - // Fill up the channel to cause poll_write to return Pending - // Channel capacity is 256 - for _ in 0..256 { - substream.write_all(&[1u8; 100]).await.unwrap(); - } - - // Now the next write should block waiting for channel capacity - let write_task = tokio::spawn(async move { - // This write will block because channel is full - let result = substream.write_all(&[2u8; 100]).await; - // Should fail because STOP_SENDING was received - assert!(result.is_err()); - }); - - // Give the writer time to block on poll_reserve - tokio::time::sleep(Duration::from_millis(10)).await; - assert!(!write_task.is_finished(), "write should be blocked"); - - // Simulate receiving STOP_SENDING from remote - handle - .on_message(WebRtcMessage { payload: None, flag: Some(Flag::StopSending) }) - .await - .unwrap(); - - // The write task should wake up and see the state change - tokio::time::timeout(Duration::from_secs(1), write_task) - .await - .expect("write task should complete after STOP_SENDING") - .unwrap(); - } - - #[tokio::test] - async fn reset_stream_wakes_blocked_writer() { - use tokio::io::AsyncWriteExt; - let (mut substream, handle) = Substream::new(); - - // Fill up the channel to cause poll_write to return Pending - // Channel capacity is 256 - for _ in 0..256 { - substream.write_all(&[1u8; 100]).await.unwrap(); - } - - // Now the next write should block waiting for channel capacity - let write_task = tokio::spawn(async move { - // This write will block because channel is full - let result = substream.write_all(&[2u8; 100]).await; - // Should fail because RESET_STREAM was received - assert!(result.is_err()); - }); - - // Give the writer time to block on poll_reserve - tokio::time::sleep(Duration::from_millis(10)).await; - assert!(!write_task.is_finished(), "write should be blocked"); - - // Simulate receiving RESET_STREAM from remote - let result = handle - .on_message(WebRtcMessage { payload: None, flag: Some(Flag::ResetStream) }) - .await; - // RESET_STREAM returns an error - assert!(result.is_err()); - - // The write task should wake up and see the state change - tokio::time::timeout(Duration::from_secs(1), write_task) - .await - .expect("write task should complete after RESET_STREAM") - .unwrap(); - } - - #[tokio::test] - async fn shutdown_rejects_new_writes() { - use tokio::io::AsyncWriteExt; - let (mut substream, mut handle) = Substream::new(); - - // Write some data - substream.write_all(&vec![1u8; 100]).await.unwrap(); - - // Spawn shutdown in background - let shutdown_task = tokio::spawn(async move { - substream.shutdown().await.unwrap(); - }); - - // Wait for data and FIN to be sent - assert_eq!( - handle.next().await, - Some(Event::Message { payload: vec![1u8; 100], flag: None }) - ); - assert_eq!( - handle.next().await, - Some(Event::Message { payload: vec![], flag: Some(Flag::Fin) }) - ); - - // Verify we transitioned through Closing to FinSent - assert!(matches!(*handle.state.lock(), State::FinSent)); - - // Send FIN_ACK to complete shutdown - handle - .on_message(WebRtcMessage { payload: None, flag: Some(Flag::FinAck) }) - .await - .unwrap(); - - // Shutdown should complete - shutdown_task.await.unwrap(); - } - - #[tokio::test] - async fn shutdown_idempotent() { - use tokio::io::AsyncWriteExt; - let (mut substream, mut handle) = Substream::new(); - - // Spawn first shutdown - let shutdown_task1 = tokio::spawn(async move { - substream.shutdown().await.unwrap(); - substream - }); - - // Wait for FIN to be sent - assert_eq!( - handle.next().await, - Some(Event::Message { payload: vec![], flag: Some(Flag::Fin) }) - ); - assert!(matches!(*handle.state.lock(), State::FinSent)); - - // Send FIN_ACK to complete first shutdown - handle - .on_message(WebRtcMessage { payload: None, flag: Some(Flag::FinAck) }) - .await - .unwrap(); - - // First shutdown should complete - let mut substream = shutdown_task1.await.unwrap(); - - // Second shutdown should succeed without error (already in FinAcked state) - substream.shutdown().await.unwrap(); - assert!(matches!(*handle.state.lock(), State::FinAcked)); - } - - #[tokio::test] - async fn shutdown_timeout_without_fin_ack() { - use tokio::time::{timeout, Duration}; - - let (mut substream, mut handle) = Substream::new(); - - // Spawn shutdown in background - let shutdown_task = tokio::spawn(async move { - substream.shutdown().await.unwrap(); - }); - - // Wait for FIN to be sent - assert_eq!( - handle.next().await, - Some(Event::Message { payload: vec![], flag: Some(Flag::Fin) }) - ); - - // Verify we're in FinSent state - assert!(matches!(*handle.state.lock(), State::FinSent)); - - // DON'T send FIN_ACK - let it timeout - // The shutdown should complete after FIN_ACK_TIMEOUT (5 seconds) - // Add a bit of buffer to the timeout - let result = timeout(Duration::from_secs(7), shutdown_task).await; - - assert!(result.is_ok(), "Shutdown should complete after timeout"); - assert!(result.unwrap().is_ok(), "Shutdown should succeed after timeout"); - - // Should have transitioned to FinAcked after timeout - assert!(matches!(*handle.state.lock(), State::FinAcked)); - } - - #[tokio::test] - async fn closing_state_blocks_writes() { - use tokio::io::AsyncWriteExt; - - let (mut substream, handle) = Substream::new(); - - // Manually transition to Closing state - *handle.state.lock() = State::Closing; - - // Attempt to write should fail - let result = substream.write_all(&vec![1u8; 100]).await; - assert!(result.is_err()); - assert_eq!(result.unwrap_err().kind(), std::io::ErrorKind::BrokenPipe); - } - - #[tokio::test] - async fn handle_signals_closure_after_substream_dropped() { - use futures::StreamExt; - - let (mut substream, mut handle) = Substream::new(); - - // Complete shutdown handshake (client-initiated) - let shutdown_task = tokio::spawn(async move { - substream.shutdown().await.unwrap(); - // Substream will be dropped here - }); - - // Receive FIN - assert_eq!( - handle.next().await, - Some(Event::Message { payload: vec![], flag: Some(Flag::Fin) }) - ); - - // Send FIN_ACK - handle - .on_message(WebRtcMessage { payload: None, flag: Some(Flag::FinAck) }) - .await - .unwrap(); - - // Wait for shutdown to complete and Substream to drop - shutdown_task.await.unwrap(); - - // Verify handle signals closure (returns None) - assert_eq!( - handle.next().await, - None, - "SubstreamHandle should signal closure after Substream is dropped" - ); - } - - #[tokio::test] - async fn server_side_closure_after_receiving_fin() { - use futures::StreamExt; - - let (mut substream, mut handle) = Substream::new(); - - // Spawn task to consume from substream (server side) - let server_task = tokio::spawn(async move { - let mut buf = vec![0u8; 1024]; - // This should fail because we receive RecvClosed - match substream.read(&mut buf).await { - Err(e) if e.kind() == std::io::ErrorKind::BrokenPipe => { - // Expected - read half closed by FIN - }, - other => panic!("Unexpected result: {:?}", other), - } - // Substream dropped here (server closes after receiving FIN) - }); - - // Remote (client) sends FIN - handle - .on_message(WebRtcMessage { payload: None, flag: Some(Flag::Fin) }) - .await - .unwrap(); - - // Verify FIN_ACK was sent back - assert_eq!( - handle.next().await, - Some(Event::Message { payload: vec![], flag: Some(Flag::FinAck) }) - ); - - // Wait for server to close substream - server_task.await.unwrap(); - - // Verify handle signals closure (returns None) - this is the key fix! - assert_eq!( - handle.next().await, - None, - "SubstreamHandle should signal closure after server receives FIN and drops Substream" - ); - } - - #[tokio::test] - async fn simultaneous_close() { - // Test simultaneous close where both sides send FIN at the same time. - // This verifies that: - // 1. Both sides can be in FinSent state simultaneously - // 2. Both sides correctly respond to FIN with FIN_ACK even when in FinSent state - // 3. Both sides eventually transition to FinAcked - - let (mut substream, mut handle) = Substream::new(); - - // Local side initiates shutdown (sends FIN, transitions to FinSent) - let shutdown_task = tokio::spawn(async move { - substream.shutdown().await.unwrap(); - }); - - // Wait for local FIN to be sent - assert_eq!( - handle.next().await, - Some(Event::Message { payload: vec![], flag: Some(Flag::Fin) }) - ); - - // Verify local is in FinSent state - assert!(matches!(*handle.state.lock(), State::FinSent)); - - // Now simulate remote also sending FIN (simultaneous close) - // This should trigger FIN_ACK response even though we're in FinSent state - handle - .on_message(WebRtcMessage { payload: None, flag: Some(Flag::Fin) }) - .await - .unwrap(); - - // Local should send FIN_ACK in response to remote's FIN - assert_eq!( - handle.next().await, - Some(Event::Message { payload: vec![], flag: Some(Flag::FinAck) }) - ); - - // Local should still be in FinSent (waiting for FIN_ACK from remote) - assert!(matches!(*handle.state.lock(), State::FinSent)); - - // Now remote sends FIN_ACK (completing their side of the handshake) - handle - .on_message(WebRtcMessage { payload: None, flag: Some(Flag::FinAck) }) - .await - .unwrap(); - - // Local should now transition to FinAcked - assert!(matches!(*handle.state.lock(), State::FinAcked)); - - // Shutdown should complete successfully - shutdown_task.await.unwrap(); - } - - #[tokio::test] - async fn fin_with_payload_delivers_data_before_close() { - // Test that when a FIN message contains payload data, the data is delivered - // to the substream before the RecvClosed event. This is important because - // the spec allows a FIN message to contain final data. - - let (mut substream, handle) = Substream::new(); - - // Simulate receiving FIN with payload from remote - handle - .on_message(WebRtcMessage { - payload: Some(b"final data".to_vec()), - flag: Some(Flag::Fin), - }) - .await - .unwrap(); - - // First, we should receive the payload data - let mut buf = vec![0u8; 1024]; - let n = substream.read(&mut buf).await.unwrap(); - assert_eq!(&buf[..n], b"final data"); - - // Then, subsequent read should fail with BrokenPipe (RecvClosed) - match substream.read(&mut buf).await { - Err(e) if e.kind() == std::io::ErrorKind::BrokenPipe => { - // Expected - read half closed after FIN - }, - other => panic!("Expected BrokenPipe error, got: {:?}", other), - } - } -} diff --git a/client/litep2p/src/transport/webrtc/util.rs b/client/litep2p/src/transport/webrtc/util.rs deleted file mode 100644 index 4be97792..00000000 --- a/client/litep2p/src/transport/webrtc/util.rs +++ /dev/null @@ -1,142 +0,0 @@ -// Copyright 2023 litep2p developers -// -// Permission is hereby granted, free of charge, to any person obtaining a -// copy of this software and associated documentation files (the "Software"), -// to deal in the Software without restriction, including without limitation -// the rights to use, copy, modify, merge, publish, distribute, sublicense, -// and/or sell copies of the Software, and to permit persons to whom the -// Software is furnished to do so, subject to the following conditions: -// -// The above copyright notice and this permission notice shall be included in -// all copies or substantial portions of the Software. -// -// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS -// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, -// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE -// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER -// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING -// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER -// DEALINGS IN THE SOFTWARE. - -use crate::{ - error::ParseError, - transport::webrtc::schema::{self, webrtc::message::Flag}, -}; - -use prost::Message; - -/// WebRTC message. -#[derive(Debug)] -pub struct WebRtcMessage { - /// Payload. - pub payload: Option>, - - /// Flag. - pub flag: Option, -} - -impl WebRtcMessage { - /// Encode WebRTC message with optional flag. - /// - /// Uses a single allocation by pre-calculating the total size and encoding - /// the varint length prefix and protobuf message directly into the output buffer. - pub fn encode(payload: Vec, flag: Option) -> Vec { - let protobuf_payload = schema::webrtc::Message { - message: (!payload.is_empty()).then_some(payload), - flag: flag.map(|f| f as i32), - }; - - // Calculate sizes upfront for single allocation with exact capacity - let protobuf_len = protobuf_payload.encoded_len(); - // Varint uses 7 bits per byte, so calculate exact length needed - // ilog2 gives the position of the highest set bit (0-indexed), divide by 7 for varint bytes - let varint_len = - if protobuf_len == 0 { 1 } else { (protobuf_len.ilog2() as usize / 7) + 1 }; - - // Single allocation for the entire output with exact size - let mut out_buf = Vec::with_capacity(varint_len + protobuf_len); - - // Encode varint length prefix directly - let mut varint_buf = unsigned_varint::encode::usize_buffer(); - let varint_slice = unsigned_varint::encode::usize(protobuf_len, &mut varint_buf); - out_buf.extend_from_slice(varint_slice); - - // Encode protobuf directly into output buffer - protobuf_payload - .encode(&mut out_buf) - .expect("Vec to provide needed capacity"); - - out_buf - } - - /// Decode payload into [`WebRtcMessage`]. - /// - /// Decodes the varint length prefix directly from the slice without allocations, - /// then decodes the protobuf message from the remaining bytes. - /// - /// # Flag handling - /// - /// Unknown flag values (e.g., from a newer protocol version) are logged as warnings - /// and treated as `None` for forward compatibility. This allows the message payload - /// to still be processed even if the flag is not recognized. - pub fn decode(payload: &[u8]) -> Result { - // Decode varint length prefix directly from slice (no allocation) - // Returns (decoded_length, remaining_bytes_after_varint) - let (len, remaining) = - unsigned_varint::decode::usize(payload).map_err(|_| ParseError::InvalidData)?; - - // Get exactly `len` bytes of protobuf data (no allocation) - let protobuf_data = remaining.get(..len).ok_or(ParseError::InvalidData)?; - - match schema::webrtc::Message::decode(protobuf_data) { - Ok(message) => { - let flag = message.flag.and_then(|f| match Flag::try_from(f) { - Ok(flag) => Some(flag), - Err(_) => { - tracing::warn!( - target: "litep2p::webrtc", - ?f, - "received message with unknown flag value, ignoring flag" - ); - None - }, - }); - Ok(Self { payload: message.message, flag }) - }, - Err(_) => Err(ParseError::InvalidData), - } - } -} - -#[cfg(test)] -mod tests { - use super::*; - - #[test] - fn with_payload_no_flag() { - let message = WebRtcMessage::encode("Hello, world!".as_bytes().to_vec(), None); - let decoded = WebRtcMessage::decode(&message).unwrap(); - - assert_eq!(decoded.payload, Some("Hello, world!".as_bytes().to_vec())); - assert_eq!(decoded.flag, None); - } - - #[test] - fn with_payload_and_flag() { - let message = - WebRtcMessage::encode("Hello, world!".as_bytes().to_vec(), Some(Flag::StopSending)); - let decoded = WebRtcMessage::decode(&message).unwrap(); - - assert_eq!(decoded.payload, Some("Hello, world!".as_bytes().to_vec())); - assert_eq!(decoded.flag, Some(Flag::StopSending)); - } - - #[test] - fn no_payload_with_flag() { - let message = WebRtcMessage::encode(vec![], Some(Flag::ResetStream)); - let decoded = WebRtcMessage::decode(&message).unwrap(); - - assert_eq!(decoded.payload, None); - assert_eq!(decoded.flag, Some(Flag::ResetStream)); - } -} diff --git a/client/network/Cargo.toml b/client/network/Cargo.toml index 381db5d8..c98d38a6 100644 --- a/client/network/Cargo.toml +++ b/client/network/Cargo.toml @@ -38,7 +38,7 @@ futures = { workspace = true } futures-timer = { workspace = true } ip_network = { workspace = true } linked_hash_set = { workspace = true } -litep2p = { path = "../litep2p", features = ["quic", "websocket"] } +litep2p = { path = "../litep2p", features = ["websocket"] } log = { workspace = true, default-features = true } mockall = { workspace = true } parking_lot = { workspace = true, default-features = true } diff --git a/client/network/src/litep2p/mod.rs b/client/network/src/litep2p/mod.rs index eb0362ea..5b8ad957 100644 --- a/client/network/src/litep2p/mod.rs +++ b/client/network/src/litep2p/mod.rs @@ -1194,7 +1194,6 @@ impl NetworkBackend for Litep2pNetworkBac NegotiationError::IoError(_) => "io-error", NegotiationError::WebSocket(_) => "webscoket-error", NegotiationError::BadSignature => "bad-signature", - NegotiationError::Quic(_) => "quic-error", } }; From 37de234a2894cb67f0f81688729dc774adde1fdb Mon Sep 17 00:00:00 2001 From: illuzen Date: Mon, 1 Jun 2026 12:15:50 +0800 Subject: [PATCH 21/26] further remove quic and webrtc --- client/litep2p/src/config.rs | 42 ---- client/litep2p/src/crypto/noise/mod.rs | 41 ---- client/litep2p/src/error.rs | 57 ------ client/litep2p/src/lib.rs | 44 ---- client/litep2p/src/protocol/protocol_set.rs | 4 +- client/litep2p/src/substream/mod.rs | 81 -------- .../litep2p/src/transport/manager/handle.rs | 44 ---- client/litep2p/src/transport/manager/mod.rs | 190 +----------------- client/litep2p/src/transport/manager/types.rs | 8 - 9 files changed, 3 insertions(+), 508 deletions(-) diff --git a/client/litep2p/src/config.rs b/client/litep2p/src/config.rs index 79bc9473..e28b7b4d 100644 --- a/client/litep2p/src/config.rs +++ b/client/litep2p/src/config.rs @@ -36,10 +36,6 @@ use crate::{ PeerId, }; -#[cfg(feature = "quic")] -use crate::transport::quic::config::Config as QuicConfig; -#[cfg(feature = "webrtc")] -use crate::transport::webrtc::config::Config as WebRtcConfig; #[cfg(feature = "websocket")] use crate::transport::websocket::config::Config as WebSocketConfig; @@ -71,14 +67,6 @@ pub struct ConfigBuilder { /// TCP transport configuration. tcp: Option, - /// QUIC transport config. - #[cfg(feature = "quic")] - quic: Option, - - /// WebRTC transport config. - #[cfg(feature = "webrtc")] - webrtc: Option, - /// WebSocket transport config. #[cfg(feature = "websocket")] websocket: Option, @@ -140,10 +128,6 @@ impl ConfigBuilder { pub fn new() -> Self { Self { tcp: None, - #[cfg(feature = "quic")] - quic: None, - #[cfg(feature = "webrtc")] - webrtc: None, #[cfg(feature = "websocket")] websocket: None, keypair: None, @@ -170,20 +154,6 @@ impl ConfigBuilder { self } - /// Add QUIC transport configuration, enabling the transport. - #[cfg(feature = "quic")] - pub fn with_quic(mut self, config: QuicConfig) -> Self { - self.quic = Some(config); - self - } - - /// Add WebRTC transport configuration, enabling the transport. - #[cfg(feature = "webrtc")] - pub fn with_webrtc(mut self, config: WebRtcConfig) -> Self { - self.webrtc = Some(config); - self - } - /// Add WebSocket transport configuration, enabling the transport. #[cfg(feature = "websocket")] pub fn with_websocket(mut self, config: WebSocketConfig) -> Self { @@ -301,10 +271,6 @@ impl ConfigBuilder { keypair, tcp: self.tcp.take(), mdns: self.mdns.take(), - #[cfg(feature = "quic")] - quic: self.quic.take(), - #[cfg(feature = "webrtc")] - webrtc: self.webrtc.take(), #[cfg(feature = "websocket")] websocket: self.websocket.take(), ping: self.ping.take(), @@ -329,14 +295,6 @@ pub struct Litep2pConfig { // TCP transport configuration. pub(crate) tcp: Option, - /// QUIC transport config. - #[cfg(feature = "quic")] - pub(crate) quic: Option, - - /// WebRTC transport config. - #[cfg(feature = "webrtc")] - pub(crate) webrtc: Option, - /// WebSocket transport config. #[cfg(feature = "websocket")] pub(crate) websocket: Option, diff --git a/client/litep2p/src/crypto/noise/mod.rs b/client/litep2p/src/crypto/noise/mod.rs index ffdfeeaf..918feb3b 100644 --- a/client/litep2p/src/crypto/noise/mod.rs +++ b/client/litep2p/src/crypto/noise/mod.rs @@ -153,47 +153,6 @@ impl NoiseContext { Self::assemble(session, kem_keypair, keypair, role) } - /// Create new [`NoiseContext`] with prologue (for WebRTC). - #[cfg(feature = "webrtc")] - pub fn with_prologue(id_keys: &Keypair, prologue: Vec) -> Result { - let kem_keypair = protocol::Keypair::new(); - let session = ClatterSession::new(&prologue, true, &kem_keypair)?; - Self::assemble(session, kem_keypair, id_keys, Role::Dialer) - } - - /// Get remote peer ID from the received Noise payload (for WebRTC). - #[cfg(feature = "webrtc")] - pub fn get_remote_peer_id(&mut self, reply: &[u8]) -> Result { - if reply.len() < 2 { - tracing::error!(target: LOG_TARGET, "reply too short to contain length prefix"); - return Err(NegotiationError::ParseError(ParseError::InvalidReplyLength)); - } - - let (len_slice, reply) = reply.split_at(2); - let len = u16::from_be_bytes( - len_slice - .try_into() - .map_err(|_| NegotiationError::ParseError(ParseError::InvalidPublicKey))?, - ) as usize; - - let mut buffer = vec![0u8; len]; - - let NoiseState::Handshake(ref mut session) = self.noise else { - tracing::error!(target: LOG_TARGET, "invalid state to read the handshake message"); - debug_assert!(false); - return Err(NegotiationError::StateMismatch); - }; - - let res = session.read_message(reply, &mut buffer)?; - buffer.truncate(res); - - let payload = handshake_schema::NoiseHandshakePayload::decode(buffer.as_slice()) - .map_err(|err| NegotiationError::ParseError(err.into()))?; - - let identity = payload.identity_key.ok_or(NegotiationError::PeerIdMissing)?; - Ok(PeerId::from_public_key_protobuf(&identity)) - } - /// Get first message (pqXX message 1: -> e). /// /// For initiator: sends ephemeral KEM public key diff --git a/client/litep2p/src/error.rs b/client/litep2p/src/error.rs index f1f89549..07173331 100644 --- a/client/litep2p/src/error.rs +++ b/client/litep2p/src/error.rs @@ -82,9 +82,6 @@ pub enum Error { DnsAddressResolutionFailed, #[error("Transport error: `{0}`")] TransportError(String), - #[cfg(feature = "quic")] - #[error("Failed to generate certificate: `{0}`")] - CertificateGeneration(#[from] crate::crypto::tls::certificate::GenError), #[error("Invalid data")] InvalidData, #[error("Input rejected")] @@ -96,9 +93,6 @@ pub enum Error { InsufficientPeers, #[error("Substream doens't exist")] SubstreamDoesntExist, - #[cfg(feature = "webrtc")] - #[error("`str0m` error: `{0}`")] - WebRtc(#[from] str0m::RtcError), #[error("Remote peer disconnected")] Disconnected, #[error("Channel does not exist")] @@ -111,9 +105,6 @@ pub enum Error { NoAddressAvailable(PeerId), #[error("Connection closed")] ConnectionClosed, - #[cfg(feature = "quic")] - #[error("Quinn error: `{0}`")] - Quinn(quinn::ConnectionError), #[error("Invalid certificate")] InvalidCertificate, #[error("Peer ID mismatch: expected `{0}`, got `{1}`")] @@ -308,10 +299,6 @@ pub enum NegotiationError { /// address. #[error("Peer ID mismatch: expected `{0}`, got `{1}`")] PeerIdMismatch(PeerId, PeerId), - /// Error specific to the QUIC transport. - #[cfg(feature = "quic")] - #[error("QUIC error: `{0}`")] - Quic(#[from] QuicError), /// Error specific to the WebSocket transport. #[cfg(feature = "websocket")] #[error("WebSocket error: `{0}`")] @@ -327,8 +314,6 @@ impl PartialEq for NegotiationError { (Self::IoError(lhs), Self::IoError(rhs)) => lhs == rhs, (Self::PeerIdMismatch(lhs, lhs_1), Self::PeerIdMismatch(rhs, rhs_1)) => lhs == rhs && lhs_1 == rhs_1, - #[cfg(feature = "quic")] - (Self::Quic(lhs), Self::Quic(rhs)) => lhs == rhs, #[cfg(feature = "websocket")] (Self::WebSocket(lhs), Self::WebSocket(rhs)) => core::mem::discriminant(lhs) == core::mem::discriminant(rhs), @@ -398,21 +383,6 @@ pub enum ImmediateDialError { ChannelClogged, } -/// Error during the QUIC transport negotiation. -#[cfg(feature = "quic")] -#[derive(Debug, thiserror::Error, PartialEq)] -pub enum QuicError { - /// The provided certificate is invalid. - #[error("Invalid certificate")] - InvalidCertificate, - /// The connection was lost. - #[error("Failed to negotiate QUIC: `{0}`")] - ConnectionError(#[from] quinn::ConnectionError), - /// The connection could not be established. - #[error("Failed to connect to peer: `{0}`")] - ConnectError(#[from] quinn::ConnectError), -} - /// Error during DNS resolution. #[derive(Debug, thiserror::Error, PartialEq)] pub enum DnsError { @@ -498,33 +468,6 @@ impl From> for AddressError { } } -#[cfg(feature = "quic")] -impl From for Error { - fn from(error: quinn::ConnectionError) -> Self { - match error { - quinn::ConnectionError::TimedOut => Error::Timeout, - error => Error::Quinn(error), - } - } -} - -#[cfg(feature = "quic")] -impl From for DialError { - fn from(error: quinn::ConnectionError) -> Self { - match error { - quinn::ConnectionError::TimedOut => DialError::Timeout, - error => DialError::NegotiationError(NegotiationError::Quic(error.into())), - } - } -} - -#[cfg(feature = "quic")] -impl From for DialError { - fn from(error: quinn::ConnectError) -> Self { - DialError::NegotiationError(NegotiationError::Quic(error.into())) - } -} - impl From for Error { fn from(error: ConnectionLimitsError) -> Self { Error::ConnectionLimit(error) diff --git a/client/litep2p/src/lib.rs b/client/litep2p/src/lib.rs index ab45a209..c362f81d 100644 --- a/client/litep2p/src/lib.rs +++ b/client/litep2p/src/lib.rs @@ -47,10 +47,6 @@ use crate::{ }, }; -#[cfg(feature = "quic")] -use crate::transport::quic::QuicTransport; -#[cfg(feature = "webrtc")] -use crate::transport::webrtc::WebRtcTransport; #[cfg(feature = "websocket")] use crate::transport::websocket::WebSocketTransport; @@ -346,36 +342,6 @@ impl Litep2p { transport_manager.register_transport(SupportedTransport::Tcp, Box::new(transport)); } - // enable quic transport if the config exists - #[cfg(feature = "quic")] - if let Some(config) = litep2p_config.quic.take() { - let handle = transport_manager.transport_handle(Arc::clone(&litep2p_config.executor)); - let (transport, transport_listen_addresses) = - ::new(handle, config, resolver.clone())?; - - for address in transport_listen_addresses { - transport_manager.register_listen_address(address.clone()); - listen_addresses.push(address.with(Protocol::P2p(*local_peer_id.as_ref()))); - } - - transport_manager.register_transport(SupportedTransport::Quic, Box::new(transport)); - } - - // enable webrtc transport if the config exists - #[cfg(feature = "webrtc")] - if let Some(config) = litep2p_config.webrtc.take() { - let handle = transport_manager.transport_handle(Arc::clone(&litep2p_config.executor)); - let (transport, transport_listen_addresses) = - ::new(handle, config, resolver.clone())?; - - for address in transport_listen_addresses { - transport_manager.register_listen_address(address.clone()); - listen_addresses.push(address.with(Protocol::P2p(*local_peer_id.as_ref()))); - } - - transport_manager.register_transport(SupportedTransport::WebRtc, Box::new(transport)); - } - // enable websocket transport if the config exists #[cfg(feature = "websocket")] if let Some(mut config) = litep2p_config.websocket.take() { @@ -439,21 +405,11 @@ impl Litep2p { .tcp .is_some() .then(|| supported_transports.insert(SupportedTransport::Tcp)); - #[cfg(feature = "quic")] - config - .quic - .is_some() - .then(|| supported_transports.insert(SupportedTransport::Quic)); #[cfg(feature = "websocket")] config .websocket .is_some() .then(|| supported_transports.insert(SupportedTransport::WebSocket)); - #[cfg(feature = "webrtc")] - config - .webrtc - .is_some() - .then(|| supported_transports.insert(SupportedTransport::WebRtc)); supported_transports } diff --git a/client/litep2p/src/protocol/protocol_set.rs b/client/litep2p/src/protocol/protocol_set.rs index df427ffe..f9d8c7cf 100644 --- a/client/litep2p/src/protocol/protocol_set.rs +++ b/client/litep2p/src/protocol/protocol_set.rs @@ -42,7 +42,7 @@ use futures::{stream::FuturesUnordered, Stream, StreamExt}; use multiaddr::Multiaddr; use tokio::sync::mpsc::{channel, Receiver, Sender}; -#[cfg(any(feature = "quic", feature = "webrtc", feature = "websocket"))] +#[cfg(feature = "websocket")] use std::sync::atomic::Ordering; use std::{ collections::HashMap, @@ -288,7 +288,7 @@ impl ProtocolSet { } /// Get next substream ID. - #[cfg(any(feature = "quic", feature = "webrtc", feature = "websocket"))] + #[cfg(feature = "websocket")] pub fn next_substream_id(&self) -> SubstreamId { SubstreamId::from(self.next_substream_id.fetch_add(1usize, Ordering::Relaxed)) } diff --git a/client/litep2p/src/substream/mod.rs b/client/litep2p/src/substream/mod.rs index c27ca97c..c731ed86 100644 --- a/client/litep2p/src/substream/mod.rs +++ b/client/litep2p/src/substream/mod.rs @@ -25,10 +25,6 @@ use crate::{ codec::ProtocolCodec, error::SubstreamError, transport::tcp, types::SubstreamId, PeerId, }; -#[cfg(feature = "quic")] -use crate::transport::quic; -#[cfg(feature = "webrtc")] -use crate::transport::webrtc; #[cfg(feature = "websocket")] use crate::transport::websocket; @@ -55,10 +51,6 @@ macro_rules! poll_flush { SubstreamType::Tcp(substream) => Pin::new(substream).poll_flush($cx), #[cfg(feature = "websocket")] SubstreamType::WebSocket(substream) => Pin::new(substream).poll_flush($cx), - #[cfg(feature = "quic")] - SubstreamType::Quic(substream) => Pin::new(substream).poll_flush($cx), - #[cfg(feature = "webrtc")] - SubstreamType::WebRtc(substream) => Pin::new(substream).poll_flush($cx), #[cfg(test)] SubstreamType::Mock(_) => unreachable!(), } @@ -71,10 +63,6 @@ macro_rules! poll_write { SubstreamType::Tcp(substream) => Pin::new(substream).poll_write($cx, $frame), #[cfg(feature = "websocket")] SubstreamType::WebSocket(substream) => Pin::new(substream).poll_write($cx, $frame), - #[cfg(feature = "quic")] - SubstreamType::Quic(substream) => Pin::new(substream).poll_write($cx, $frame), - #[cfg(feature = "webrtc")] - SubstreamType::WebRtc(substream) => Pin::new(substream).poll_write($cx, $frame), #[cfg(test)] SubstreamType::Mock(_) => unreachable!(), } @@ -87,10 +75,6 @@ macro_rules! poll_read { SubstreamType::Tcp(substream) => Pin::new(substream).poll_read($cx, $buffer), #[cfg(feature = "websocket")] SubstreamType::WebSocket(substream) => Pin::new(substream).poll_read($cx, $buffer), - #[cfg(feature = "quic")] - SubstreamType::Quic(substream) => Pin::new(substream).poll_read($cx, $buffer), - #[cfg(feature = "webrtc")] - SubstreamType::WebRtc(substream) => Pin::new(substream).poll_read($cx, $buffer), #[cfg(test)] SubstreamType::Mock(_) => unreachable!(), } @@ -103,10 +87,6 @@ macro_rules! poll_shutdown { SubstreamType::Tcp(substream) => Pin::new(substream).poll_shutdown($cx), #[cfg(feature = "websocket")] SubstreamType::WebSocket(substream) => Pin::new(substream).poll_shutdown($cx), - #[cfg(feature = "quic")] - SubstreamType::Quic(substream) => Pin::new(substream).poll_shutdown($cx), - #[cfg(feature = "webrtc")] - SubstreamType::WebRtc(substream) => Pin::new(substream).poll_shutdown($cx), #[cfg(test)] SubstreamType::Mock(substream) => { let _ = Pin::new(substream).poll_close($cx); @@ -167,10 +147,6 @@ enum SubstreamType { Tcp(tcp::Substream), #[cfg(feature = "websocket")] WebSocket(websocket::Substream), - #[cfg(feature = "quic")] - Quic(quic::Substream), - #[cfg(feature = "webrtc")] - WebRtc(webrtc::Substream), #[cfg(test)] Mock(Box), } @@ -181,10 +157,6 @@ impl fmt::Debug for SubstreamType { Self::Tcp(_) => write!(f, "Tcp"), #[cfg(feature = "websocket")] Self::WebSocket(_) => write!(f, "WebSocket"), - #[cfg(feature = "quic")] - Self::Quic(_) => write!(f, "Quic"), - #[cfg(feature = "webrtc")] - Self::WebRtc(_) => write!(f, "WebRtc"), #[cfg(test)] Self::Mock(_) => write!(f, "Mock"), } @@ -287,32 +259,6 @@ impl Substream { Self::new(peer, substream_id, SubstreamType::WebSocket(substream), codec) } - /// Create new [`Substream`] for QUIC. - #[cfg(feature = "quic")] - pub(crate) fn new_quic( - peer: PeerId, - substream_id: SubstreamId, - substream: quic::Substream, - codec: ProtocolCodec, - ) -> Self { - tracing::trace!(target: LOG_TARGET, ?peer, ?codec, "create new substream for quic"); - - Self::new(peer, substream_id, SubstreamType::Quic(substream), codec) - } - - /// Create new [`Substream`] for WebRTC. - #[cfg(feature = "webrtc")] - pub(crate) fn new_webrtc( - peer: PeerId, - substream_id: SubstreamId, - substream: webrtc::Substream, - codec: ProtocolCodec, - ) -> Self { - tracing::trace!(target: LOG_TARGET, ?peer, ?codec, "create new substream for webrtc"); - - Self::new(peer, substream_id, SubstreamType::WebRtc(substream), codec) - } - /// Create new [`Substream`] for mocking. #[cfg(test)] pub(crate) fn new_mock( @@ -331,10 +277,6 @@ impl Substream { SubstreamType::Tcp(mut substream) => substream.shutdown().await, #[cfg(feature = "websocket")] SubstreamType::WebSocket(mut substream) => substream.shutdown().await, - #[cfg(feature = "quic")] - SubstreamType::Quic(mut substream) => substream.shutdown().await, - #[cfg(feature = "webrtc")] - SubstreamType::WebRtc(mut substream) => substream.shutdown().await, #[cfg(test)] SubstreamType::Mock(mut substream) => { let _ = futures::SinkExt::close(&mut substream).await; @@ -424,29 +366,6 @@ impl Substream { ProtocolCodec::UnsignedVarint(max_size) => Self::send_unsigned_varint_payload(substream, bytes, max_size).await, }, - #[cfg(feature = "quic")] - SubstreamType::Quic(ref mut substream) => match self.codec { - ProtocolCodec::Unspecified => panic!("codec is unspecified"), - ProtocolCodec::Identity(payload_size) => - Self::send_identity_payload(substream, payload_size, bytes).await, - ProtocolCodec::UnsignedVarint(max_size) => { - check_size!(max_size, bytes.len()); - - let mut buffer = unsigned_varint::encode::usize_buffer(); - let len = unsigned_varint::encode::usize(bytes.len(), &mut buffer); - let len = BytesMut::from(len); - - substream.write_all_chunks(&mut [len.freeze(), bytes]).await - }, - }, - #[cfg(feature = "webrtc")] - SubstreamType::WebRtc(ref mut substream) => match self.codec { - ProtocolCodec::Unspecified => panic!("codec is unspecified"), - ProtocolCodec::Identity(payload_size) => - Self::send_identity_payload(substream, payload_size, bytes).await, - ProtocolCodec::UnsignedVarint(max_size) => - Self::send_unsigned_varint_payload(substream, bytes, max_size).await, - }, } } } diff --git a/client/litep2p/src/transport/manager/handle.rs b/client/litep2p/src/transport/manager/handle.rs index 9dbfd87a..2bee0aff 100644 --- a/client/litep2p/src/transport/manager/handle.rs +++ b/client/litep2p/src/transport/manager/handle.rs @@ -155,12 +155,6 @@ impl TransportManagerHandle { self.supported_transport.contains(&SupportedTransport::WebSocket), _ => false, }, - #[cfg(feature = "quic")] - Some(Protocol::Udp(_)) => match (iter.next(), iter.next(), iter.next()) { - (Some(Protocol::QuicV1), Some(Protocol::P2p(_)), None) => - self.supported_transport.contains(&SupportedTransport::Quic), - _ => false, - }, _ => false, } } @@ -535,44 +529,6 @@ mod tests { assert!(!handle.supported_transport(&address)); } - #[cfg(feature = "quic")] - #[tokio::test] - async fn quic_supported() { - let (mut handle, _rx) = make_transport_manager_handle(); - handle.supported_transport.insert(SupportedTransport::Quic); - - let address = - "/dns4/google.com/udp/24928/quic-v1/p2p/12D3KooWKrUnV42yDR7G6DewmgHtFaVCJWLjQRi2G9t5eJD3BvTy" - .parse() - .unwrap(); - assert!(handle.supported_transport(&address)); - } - - #[cfg(feature = "quic")] - #[tokio::test] - async fn quic_unsupported() { - let (handle, _rx) = make_transport_manager_handle(); - - let address = - "/dns4/google.com/udp/24928/quic-v1/p2p/12D3KooWKrUnV42yDR7G6DewmgHtFaVCJWLjQRi2G9t5eJD3BvTy" - .parse() - .unwrap(); - assert!(!handle.supported_transport(&address)); - } - - #[cfg(feature = "quic")] - #[tokio::test] - async fn quic_non_terminal_unsupported() { - let (mut handle, _rx) = make_transport_manager_handle(); - handle.supported_transport.insert(SupportedTransport::Quic); - - let address = - "/dns4/google.com/udp/24928/quic-v1/p2p/12D3KooWKrUnV42yDR7G6DewmgHtFaVCJWLjQRi2G9t5eJD3BvTy/p2p-circuit" - .parse() - .unwrap(); - assert!(!handle.supported_transport(&address)); - } - #[test] fn transport_not_supported() { let (handle, _rx) = make_transport_manager_handle(); diff --git a/client/litep2p/src/transport/manager/mod.rs b/client/litep2p/src/transport/manager/mod.rs index adc9894c..61063323 100644 --- a/client/litep2p/src/transport/manager/mod.rs +++ b/client/litep2p/src/transport/manager/mod.rs @@ -500,12 +500,6 @@ impl TransportManager { let mut transports = HashMap::>::new(); for address in addresses.iter().cloned() { - #[cfg(feature = "quic")] - if address.iter().any(|p| std::matches!(&p, Protocol::QuicV1)) { - transports.entry(SupportedTransport::Quic).or_default().push(address); - continue; - } - #[cfg(feature = "websocket")] if address.iter().any(|p| std::matches!(&p, Protocol::Ws(_) | Protocol::Wss(_))) { transports.entry(SupportedTransport::WebSocket).or_default().push(address); @@ -633,17 +627,6 @@ impl TransportManager { Some(Protocol::P2p(_)) => SupportedTransport::Tcp, _ => return Err(Error::TransportNotSupported(address_record.address().clone())), }, - #[cfg(feature = "quic")] - Protocol::Udp(_) => match protocol_stack - .next() - .ok_or_else(|| Error::TransportNotSupported(address_record.address().clone()))? - { - Protocol::QuicV1 => SupportedTransport::Quic, - _ => { - tracing::debug!(target: LOG_TARGET, address = ?address_record.address(), "expected `quic-v1`"); - return Err(Error::TransportNotSupported(address_record.address().clone())); - }, - }, protocol => { tracing::error!( target: LOG_TARGET, @@ -1460,172 +1443,6 @@ mod tests { (dial_address, connection_id) } - #[tokio::test] - #[cfg(feature = "websocket")] - #[cfg(feature = "quic")] - async fn transport_events() { - struct MockTransport { - rx: tokio::sync::mpsc::Receiver, - } - - impl MockTransport { - fn new(rx: tokio::sync::mpsc::Receiver) -> Self { - Self { rx } - } - } - - impl Transport for MockTransport { - fn dial( - &mut self, - _connection_id: ConnectionId, - _address: Multiaddr, - ) -> crate::Result<()> { - Ok(()) - } - - fn accept( - &mut self, - _connection_id: ConnectionId, - ) -> crate::Result>> { - Ok(Box::pin(async { Ok(()) })) - } - - fn accept_pending(&mut self, _connection_id: ConnectionId) -> crate::Result<()> { - Ok(()) - } - - fn reject_pending(&mut self, _connection_id: ConnectionId) -> crate::Result<()> { - Ok(()) - } - - fn reject(&mut self, _connection_id: ConnectionId) -> crate::Result<()> { - Ok(()) - } - - fn open( - &mut self, - _connection_id: ConnectionId, - _addresses: Vec, - ) -> crate::Result<()> { - Ok(()) - } - - fn negotiate(&mut self, _connection_id: ConnectionId) -> crate::Result<()> { - Ok(()) - } - - fn cancel(&mut self, _connection_id: ConnectionId) {} - } - - impl Stream for MockTransport { - type Item = TransportEvent; - fn poll_next( - mut self: Pin<&mut Self>, - cx: &mut Context<'_>, - ) -> Poll> { - self.rx.poll_recv(cx) - } - } - - let mut transports = TransportContext::new(); - - let (tx_tcp, rx) = tokio::sync::mpsc::channel(8); - let transport = MockTransport::new(rx); - transports.register_transport(SupportedTransport::Tcp, Box::new(transport)); - - let (tx_ws, rx) = tokio::sync::mpsc::channel(8); - let transport = MockTransport::new(rx); - transports.register_transport(SupportedTransport::WebSocket, Box::new(transport)); - - let (tx_quic, rx) = tokio::sync::mpsc::channel(8); - let transport = MockTransport::new(rx); - transports.register_transport(SupportedTransport::Quic, Box::new(transport)); - - assert_eq!(transports.index, 0); - assert_eq!(transports.transports.len(), 3); - // No items. - futures::future::poll_fn(|cx| match transports.poll_next_unpin(cx) { - std::task::Poll::Ready(_) => panic!("didn't expect event from `TransportService`"), - std::task::Poll::Pending => std::task::Poll::Ready(()), - }) - .await; - assert_eq!(transports.index, 0); - - // Websocket events. - tx_ws - .send(TransportEvent::PendingInboundConnection { connection_id: ConnectionId::from(1) }) - .await - .expect("channel to be open"); - - let event = futures::future::poll_fn(|cx| transports.poll_next_unpin(cx)) - .await - .expect("expected event"); - assert_eq!(event.0, SupportedTransport::WebSocket); - assert!(std::matches!(event.1, TransportEvent::PendingInboundConnection { .. })); - assert_eq!(transports.index, 2); - - // TCP events. - tx_tcp - .send(TransportEvent::PendingInboundConnection { connection_id: ConnectionId::from(2) }) - .await - .expect("channel to be open"); - - let event = futures::future::poll_fn(|cx| transports.poll_next_unpin(cx)) - .await - .expect("expected event"); - assert_eq!(event.0, SupportedTransport::Tcp); - assert!(std::matches!(event.1, TransportEvent::PendingInboundConnection { .. })); - assert_eq!(transports.index, 1); - - // QUIC events - tx_quic - .send(TransportEvent::PendingInboundConnection { connection_id: ConnectionId::from(3) }) - .await - .expect("channel to be open"); - - let event = futures::future::poll_fn(|cx| transports.poll_next_unpin(cx)) - .await - .expect("expected event"); - assert_eq!(event.0, SupportedTransport::Quic); - assert!(std::matches!(event.1, TransportEvent::PendingInboundConnection { .. })); - assert_eq!(transports.index, 0); - - // All three transports produce events. - tx_ws - .send(TransportEvent::PendingInboundConnection { connection_id: ConnectionId::from(4) }) - .await - .expect("channel to be open"); - tx_tcp - .send(TransportEvent::PendingInboundConnection { connection_id: ConnectionId::from(5) }) - .await - .expect("channel to be open"); - tx_quic - .send(TransportEvent::PendingInboundConnection { connection_id: ConnectionId::from(6) }) - .await - .expect("channel to be open"); - - let event = futures::future::poll_fn(|cx| transports.poll_next_unpin(cx)) - .await - .expect("expected event"); - assert_eq!(event.0, SupportedTransport::Tcp); - assert!(std::matches!(event.1, TransportEvent::PendingInboundConnection { .. })); - assert_eq!(transports.index, 1); - - let event = futures::future::poll_fn(|cx| transports.poll_next_unpin(cx)) - .await - .expect("expected event"); - assert_eq!(event.0, SupportedTransport::WebSocket); - assert!(std::matches!(event.1, TransportEvent::PendingInboundConnection { .. })); - assert_eq!(transports.index, 2); - - let event = futures::future::poll_fn(|cx| transports.poll_next_unpin(cx)) - .await - .expect("expected event"); - assert_eq!(event.0, SupportedTransport::Quic); - assert!(std::matches!(event.1, TransportEvent::PendingInboundConnection { .. })); - assert_eq!(transports.index, 0); - } - #[test] #[should_panic] #[cfg(debug_assertions)] @@ -1881,8 +1698,6 @@ mod tests { let mut transports = HashSet::new(); transports.insert(SupportedTransport::Tcp); - #[cfg(feature = "quic")] - transports.insert(SupportedTransport::Quic); let manager = TransportManagerBuilder::new().with_supported_transports(transports).build(); @@ -1902,15 +1717,12 @@ mod tests { .with(Protocol::P2p(Multihash::from_bytes(&PeerId::random().to_bytes()).unwrap())); assert!(handle.supported_transport(&address)); - // quic + // quic - not supported let address = Multiaddr::empty() .with(Protocol::Ip4(Ipv4Addr::new(127, 0, 0, 1))) .with(Protocol::Udp(8888)) .with(Protocol::QuicV1) .with(Protocol::P2p(Multihash::from_bytes(&PeerId::random().to_bytes()).unwrap())); - #[cfg(feature = "quic")] - assert!(handle.supported_transport(&address)); - #[cfg(not(feature = "quic"))] assert!(!handle.supported_transport(&address)); // websocket diff --git a/client/litep2p/src/transport/manager/types.rs b/client/litep2p/src/transport/manager/types.rs index 4d578c2d..efad7cf0 100644 --- a/client/litep2p/src/transport/manager/types.rs +++ b/client/litep2p/src/transport/manager/types.rs @@ -26,14 +26,6 @@ pub enum SupportedTransport { /// TCP. Tcp, - /// QUIC. - #[cfg(feature = "quic")] - Quic, - - /// WebRTC - #[cfg(feature = "webrtc")] - WebRtc, - /// WebSocket #[cfg(feature = "websocket")] WebSocket, From 1f215dd565f8434a875c967d6e32d464dbac3fd9 Mon Sep 17 00:00:00 2001 From: illuzen Date: Mon, 1 Jun 2026 12:21:45 +0800 Subject: [PATCH 22/26] fmt --- client/litep2p/src/crypto/dilithium.rs | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/client/litep2p/src/crypto/dilithium.rs b/client/litep2p/src/crypto/dilithium.rs index 7e432094..0fe0c684 100644 --- a/client/litep2p/src/crypto/dilithium.rs +++ b/client/litep2p/src/crypto/dilithium.rs @@ -118,7 +118,9 @@ impl Keypair { impl fmt::Debug for Keypair { fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { - f.debug_struct("Keypair").field("public", &self.public()).finish_non_exhaustive() + f.debug_struct("Keypair") + .field("public", &self.public()) + .finish_non_exhaustive() } } From fe0d3455d869c673deb3e1ff4ca0df1db5a712b0 Mon Sep 17 00:00:00 2001 From: illuzen Date: Mon, 1 Jun 2026 13:40:38 +0800 Subject: [PATCH 23/26] test issues --- Cargo.lock | 1 + client/network/Cargo.toml | 1 + client/network/src/protocol_controller.rs | 2 +- 3 files changed, 3 insertions(+), 1 deletion(-) diff --git a/Cargo.lock b/Cargo.lock index d83a3a36..e592b7bc 100644 --- a/Cargo.lock +++ b/Cargo.lock @@ -9683,6 +9683,7 @@ dependencies = [ "sp-blockchain", "sp-core", "sp-runtime", + "sp-tracing", "substrate-prometheus-endpoint", "tempfile", "thiserror 1.0.69", diff --git a/client/network/Cargo.toml b/client/network/Cargo.toml index c98d38a6..7888261e 100644 --- a/client/network/Cargo.toml +++ b/client/network/Cargo.toml @@ -79,6 +79,7 @@ zeroize = { workspace = true, default-features = true } [dev-dependencies] assert_matches = { workspace = true } multistream-select = { workspace = true } +sp-tracing = { workspace = true } tempfile = { workspace = true } tokio = { features = ["macros", "rt-multi-thread"], workspace = true, default-features = true } tokio-util = { features = ["compat"], workspace = true } diff --git a/client/network/src/protocol_controller.rs b/client/network/src/protocol_controller.rs index 340cc809..e68904e1 100644 --- a/client/network/src/protocol_controller.rs +++ b/client/network/src/protocol_controller.rs @@ -858,8 +858,8 @@ mod tests { peer_store::{PeerStoreProvider, ProtocolHandle as ProtocolHandleT}, ReputationChange, }; - use libp2p::PeerId; use sc_network_common::role::ObservedRole; + use sc_network_types::PeerId; use sc_utils::mpsc::{tracing_unbounded, TryRecvError}; use std::collections::HashSet; From 3548ce7d31462a0f50c425de7744ff0a0d51f9de Mon Sep 17 00:00:00 2001 From: illuzen Date: Mon, 1 Jun 2026 15:56:59 +0800 Subject: [PATCH 24/26] fix tests and remove unused code --- .cargo/config.toml | 2 + .../tests/substream_validation.rs | 8 +- client/litep2p/src/transport/manager/mod.rs | 4 +- client/network/src/lib.rs | 3 - .../litep2p/shim/notification/tests/fuzz.rs | 5 +- .../litep2p/shim/request_response/tests.rs | 20 +- client/network/src/mock.rs | 73 - client/network/src/request_responses.rs | 1903 ----------------- 8 files changed, 29 insertions(+), 1989 deletions(-) delete mode 100644 client/network/src/mock.rs delete mode 100644 client/network/src/request_responses.rs diff --git a/.cargo/config.toml b/.cargo/config.toml index 641b3273..68151577 100644 --- a/.cargo/config.toml +++ b/.cargo/config.toml @@ -4,3 +4,5 @@ # On Linux (CI/Docker) this is handled by the system clang package. DYLD_LIBRARY_PATH = { value = "/opt/homebrew/opt/llvm/lib", condition = { os = ["macos"] }, force = false } LIBCLANG_PATH = { value = "/opt/homebrew/opt/llvm/lib", condition = { os = ["macos"] }, force = false } +# ML-KEM 768 + Dilithium keys are large (~10KB combined), need larger stack for debug builds +RUST_MIN_STACK = "8388608" diff --git a/client/litep2p/src/protocol/notification/tests/substream_validation.rs b/client/litep2p/src/protocol/notification/tests/substream_validation.rs index f5516f3a..8985a3e7 100644 --- a/client/litep2p/src/protocol/notification/tests/substream_validation.rs +++ b/client/litep2p/src/protocol/notification/tests/substream_validation.rs @@ -27,7 +27,7 @@ use crate::{ negotiation::HandshakeEvent, tests::{add_peer, make_notification_protocol}, types::{Direction, NotificationEvent, ValidationResult}, - InboundState, OutboundState, PeerContext, PeerState, + InboundState, OutboundState, PeerState, }, InnerTransportEvent, ProtocolCommand, }, @@ -36,11 +36,13 @@ use crate::{ types::{protocol::ProtocolName, ConnectionId, SubstreamId}, PeerId, }; +#[cfg(debug_assertions)] +use crate::protocol::notification::PeerContext; use bytes::BytesMut; use futures::StreamExt; use multiaddr::Multiaddr; -use tokio::sync::{mpsc::channel, oneshot}; +use tokio::sync::mpsc::channel; use std::task::Poll; @@ -425,6 +427,8 @@ async fn open_substream_accepted() { #[should_panic] #[cfg(debug_assertions)] async fn open_substream_rejected() { + use tokio::sync::oneshot; + let (mut notif, _handle, _sender, _tx) = make_notification_protocol(); let (peer, _service, _receiver) = add_peer(); let (shutdown, _rx) = oneshot::channel(); diff --git a/client/litep2p/src/transport/manager/mod.rs b/client/litep2p/src/transport/manager/mod.rs index 61063323..b5d5047c 100644 --- a/client/litep2p/src/transport/manager/mod.rs +++ b/client/litep2p/src/transport/manager/mod.rs @@ -1422,8 +1422,10 @@ mod tests { use crate::{ crypto::dilithium::Keypair, executor::DefaultExecutor, - transport::{dummy::DummyTransport, KEEP_ALIVE_TIMEOUT}, + transport::dummy::DummyTransport, }; + #[cfg(debug_assertions)] + use crate::transport::KEEP_ALIVE_TIMEOUT; #[cfg(feature = "websocket")] use std::borrow::Cow; use std::{ diff --git a/client/network/src/lib.rs b/client/network/src/lib.rs index 682dfb21..db1fd334 100644 --- a/client/network/src/lib.rs +++ b/client/network/src/lib.rs @@ -256,9 +256,6 @@ pub mod litep2p; -#[cfg(test)] -mod mock; - pub mod config; pub mod error; pub mod event; diff --git a/client/network/src/litep2p/shim/notification/tests/fuzz.rs b/client/network/src/litep2p/shim/notification/tests/fuzz.rs index 8967caa4..9a317ce0 100644 --- a/client/network/src/litep2p/shim/notification/tests/fuzz.rs +++ b/client/network/src/litep2p/shim/notification/tests/fuzz.rs @@ -19,6 +19,9 @@ //! Fuzz test emulates network events and peer connection handling by `Peerset` //! and `PeerStore` to discover possible inconsistencies in peer management. +// This entire module only runs in debug builds +#![cfg(debug_assertions)] + use crate::{ litep2p::{ peerstore::Peerstore, @@ -46,7 +49,6 @@ use std::{ }; #[tokio::test] -#[cfg(debug_assertions)] async fn run() { sp_tracing::try_init_simple(); @@ -55,7 +57,6 @@ async fn run() { } } -#[cfg(debug_assertions)] async fn test_once() { // PRNG to use. let mut rng = rand::thread_rng(); diff --git a/client/network/src/litep2p/shim/request_response/tests.rs b/client/network/src/litep2p/shim/request_response/tests.rs index 78b6ef0a..2c583e63 100644 --- a/client/network/src/litep2p/shim/request_response/tests.rs +++ b/client/network/src/litep2p/shim/request_response/tests.rs @@ -67,7 +67,13 @@ async fn make_litep2p() -> (Litep2p, RequestResponseHandle) { // connect two `litep2p` instances together async fn connect_peers(litep2p1: &mut Litep2p, litep2p2: &mut Litep2p) { - let address = litep2p2.listen_addresses().next().unwrap().clone(); + // Prefer loopback address (127.0.0.1) to avoid network interface issues in tests + let address = litep2p2 + .listen_addresses() + .find(|addr| addr.to_string().contains("127.0.0.1")) + .or_else(|| litep2p2.listen_addresses().next()) + .unwrap() + .clone(); litep2p1.dial_address(address).await.unwrap(); let mut litep2p1_connected = false; @@ -175,10 +181,14 @@ async fn send_request_to_disconnected_peer_and_dial() { let peer1 = *litep2p1.local_peer_id(); let peer2 = *litep2p2.local_peer_id(); - litep2p1.add_known_address( - peer2, - std::iter::once(litep2p2.listen_addresses().next().expect("listen address").clone()), - ); + // Prefer loopback address to avoid network interface issues in tests + let listen_addr = litep2p2 + .listen_addresses() + .find(|addr| addr.to_string().contains("127.0.0.1")) + .or_else(|| litep2p2.listen_addresses().next()) + .expect("listen address") + .clone(); + litep2p1.add_known_address(peer2, std::iter::once(listen_addr)); let (outbound_tx1, outbound_rx1) = tracing_unbounded("outbound-request", 1000); let senders = HashMap::from_iter([(ProtocolName::from("/protocol/1"), outbound_tx1.clone())]); diff --git a/client/network/src/mock.rs b/client/network/src/mock.rs deleted file mode 100644 index 4e80e00d..00000000 --- a/client/network/src/mock.rs +++ /dev/null @@ -1,73 +0,0 @@ -// This file is part of Substrate. - -// Copyright (C) Parity Technologies (UK) Ltd. -// SPDX-License-Identifier: GPL-3.0-or-later WITH Classpath-exception-2.0 - -// This program is free software: you can redistribute it and/or modify -// it under the terms of the GNU General Public License as published by -// the Free Software Foundation, either version 3 of the License, or -// (at your option) any later version. - -// This program is distributed in the hope that it will be useful, -// but WITHOUT ANY WARRANTY; without even the implied warranty of -// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the -// GNU General Public License for more details. - -// You should have received a copy of the GNU General Public License -// along with this program. If not, see . - -//! Mocked components for tests. - -use crate::{ - peer_store::{PeerStoreProvider, ProtocolHandle}, - ReputationChange, -}; - -use sc_network_common::role::ObservedRole; -use sc_network_types::PeerId; - -use std::{collections::HashSet, sync::Arc}; - -/// No-op `PeerStore`. -#[derive(Debug)] -pub struct MockPeerStore {} - -impl PeerStoreProvider for MockPeerStore { - fn is_banned(&self, _peer_id: &PeerId) -> bool { - // Make sure that the peer is not banned. - false - } - - fn register_protocol(&self, _protocol_handle: Arc) { - // Make sure not to fail. - } - - fn report_disconnect(&self, _peer_id: PeerId) { - // Make sure not to fail. - } - - fn report_peer(&self, _peer_id: PeerId, _change: ReputationChange) { - // Make sure not to fail. - } - - fn peer_reputation(&self, _peer_id: &PeerId) -> i32 { - // Make sure that the peer is not banned. - 0 - } - - fn peer_role(&self, _peer_id: &PeerId) -> Option { - None - } - - fn set_peer_role(&self, _peer_id: &PeerId, _role: ObservedRole) { - unimplemented!(); - } - - fn outgoing_candidates(&self, _count: usize, _ignored: HashSet) -> Vec { - unimplemented!() - } - - fn add_known_peer(&self, _peer_id: PeerId) { - unimplemented!() - } -} diff --git a/client/network/src/request_responses.rs b/client/network/src/request_responses.rs deleted file mode 100644 index ac872245..00000000 --- a/client/network/src/request_responses.rs +++ /dev/null @@ -1,1903 +0,0 @@ -// This file is part of Substrate. - -// Copyright (C) Parity Technologies (UK) Ltd. -// SPDX-License-Identifier: GPL-3.0-or-later WITH Classpath-exception-2.0 - -// This program is free software: you can redistribute it and/or modify -// it under the terms of the GNU General Public License as published by -// the Free Software Foundation, either version 3 of the License, or -// (at your option) any later version. - -// This program is distributed in the hope that it will be useful, -// but WITHOUT ANY WARRANTY; without even the implied warranty of -// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the -// GNU General Public License for more details. - -// You should have received a copy of the GNU General Public License -// along with this program. If not, see . - -//! Collection of request-response protocols. -//! -//! The [`RequestResponsesBehaviour`] struct defined in this module provides support for zero or -//! more so-called "request-response" protocols. -//! -//! A request-response protocol works in the following way: -//! -//! - For every emitted request, a new substream is open and the protocol is negotiated. If the -//! remote supports the protocol, the size of the request is sent as a LEB128 number, followed -//! with the request itself. The remote then sends the size of the response as a LEB128 number, -//! followed with the response. -//! -//! - Requests have a certain time limit before they time out. This time includes the time it -//! takes to send/receive the request and response. -//! -//! - If provided, a ["requests processing"](ProtocolConfig::inbound_queue) channel -//! is used to handle incoming requests. - -use crate::{ - peer_store::{PeerStoreProvider, BANNED_THRESHOLD}, - service::traits::RequestResponseConfig as RequestResponseConfigT, - types::ProtocolName, - ReputationChange, -}; - -use futures::{channel::oneshot, prelude::*}; -use libp2p::{ - core::{transport::PortUse, Endpoint, Multiaddr}, - request_response::{self, Behaviour, Codec, Message, ProtocolSupport, ResponseChannel}, - swarm::{ - behaviour::FromSwarm, handler::multi::MultiHandler, ConnectionDenied, ConnectionId, - NetworkBehaviour, THandler, THandlerInEvent, THandlerOutEvent, ToSwarm, - }, - PeerId, -}; - -use std::{ - collections::{hash_map::Entry, HashMap}, - io, iter, - ops::Deref, - pin::Pin, - sync::Arc, - task::{Context, Poll}, - time::{Duration, Instant}, -}; - -pub use libp2p::request_response::{Config, InboundRequestId, OutboundRequestId}; - -/// Logging target for the file. -const LOG_TARGET: &str = "sub-libp2p::request-response"; - -/// Periodically check if requests are taking too long. -const PERIODIC_REQUEST_CHECK: Duration = Duration::from_secs(2); - -/// Possible failures occurring in the context of sending an outbound request and receiving the -/// response. -#[derive(Debug, Clone, thiserror::Error)] -pub enum OutboundFailure { - /// The request could not be sent because a dialing attempt failed. - #[error("Failed to dial the requested peer")] - DialFailure, - /// The request timed out before a response was received. - #[error("Timeout while waiting for a response")] - Timeout, - /// The connection closed before a response was received. - #[error("Connection was closed before a response was received")] - ConnectionClosed, - /// The remote supports none of the requested protocols. - #[error("The remote supports none of the requested protocols")] - UnsupportedProtocols, - /// An IO failure happened on an outbound stream. - #[error("An IO failure happened on an outbound stream")] - Io(Arc), -} - -impl From for OutboundFailure { - fn from(out: request_response::OutboundFailure) -> Self { - match out { - request_response::OutboundFailure::DialFailure => OutboundFailure::DialFailure, - request_response::OutboundFailure::Timeout => OutboundFailure::Timeout, - request_response::OutboundFailure::ConnectionClosed => - OutboundFailure::ConnectionClosed, - request_response::OutboundFailure::UnsupportedProtocols => - OutboundFailure::UnsupportedProtocols, - request_response::OutboundFailure::Io(error) => OutboundFailure::Io(Arc::new(error)), - } - } -} - -/// Possible failures occurring in the context of receiving an inbound request and sending a -/// response. -#[derive(Debug, thiserror::Error)] -pub enum InboundFailure { - /// The inbound request timed out, either while reading the incoming request or before a - /// response is sent - #[error("Timeout while receiving request or sending response")] - Timeout, - /// The connection closed before a response could be send. - #[error("Connection was closed before a response could be sent")] - ConnectionClosed, - /// The local peer supports none of the protocols requested by the remote. - #[error("The local peer supports none of the protocols requested by the remote")] - UnsupportedProtocols, - /// The local peer failed to respond to an inbound request - #[error("The response channel was dropped without sending a response to the remote")] - ResponseOmission, - /// An IO failure happened on an inbound stream. - #[error("An IO failure happened on an inbound stream")] - Io(Arc), -} - -impl From for InboundFailure { - fn from(out: request_response::InboundFailure) -> Self { - match out { - request_response::InboundFailure::ResponseOmission => InboundFailure::ResponseOmission, - request_response::InboundFailure::Timeout => InboundFailure::Timeout, - request_response::InboundFailure::ConnectionClosed => InboundFailure::ConnectionClosed, - request_response::InboundFailure::UnsupportedProtocols => - InboundFailure::UnsupportedProtocols, - request_response::InboundFailure::Io(error) => InboundFailure::Io(Arc::new(error)), - } - } -} - -/// Error in a request. -#[derive(Debug, thiserror::Error)] -#[allow(missing_docs)] -pub enum RequestFailure { - #[error("We are not currently connected to the requested peer.")] - NotConnected, - #[error("Given protocol hasn't been registered.")] - UnknownProtocol, - #[error("Remote has closed the substream before answering, thereby signaling that it considers the request as valid, but refused to answer it.")] - Refused, - #[error("The remote replied, but the local node is no longer interested in the response.")] - Obsolete, - #[error("Problem on the network: {0}")] - Network(OutboundFailure), -} - -/// Configuration for a single request-response protocol. -#[derive(Debug, Clone)] -pub struct ProtocolConfig { - /// Name of the protocol on the wire. Should be something like `/foo/bar`. - pub name: ProtocolName, - - /// Fallback on the wire protocol names to support. - pub fallback_names: Vec, - - /// Maximum allowed size, in bytes, of a request. - /// - /// Any request larger than this value will be declined as a way to avoid allocating too - /// much memory for it. - pub max_request_size: u64, - - /// Maximum allowed size, in bytes, of a response. - /// - /// Any response larger than this value will be declined as a way to avoid allocating too - /// much memory for it. - pub max_response_size: u64, - - /// Duration after which emitted requests are considered timed out. - /// - /// If you expect the response to come back quickly, you should set this to a smaller duration. - pub request_timeout: Duration, - - /// Channel on which the networking service will send incoming requests. - /// - /// Every time a peer sends a request to the local node using this protocol, the networking - /// service will push an element on this channel. The receiving side of this channel then has - /// to pull this element, process the request, and send back the response to send back to the - /// peer. - /// - /// The size of the channel has to be carefully chosen. If the channel is full, the networking - /// service will discard the incoming request send back an error to the peer. Consequently, - /// the channel being full is an indicator that the node is overloaded. - /// - /// You can typically set the size of the channel to `T / d`, where `T` is the - /// `request_timeout` and `d` is the expected average duration of CPU and I/O it takes to - /// build a response. - /// - /// Can be `None` if the local node does not support answering incoming requests. - /// If this is `None`, then the local node will not advertise support for this protocol towards - /// other peers. If this is `Some` but the channel is closed, then the local node will - /// advertise support for this protocol, but any incoming request will lead to an error being - /// sent back. - pub inbound_queue: Option>, -} - -impl RequestResponseConfigT for ProtocolConfig { - fn protocol_name(&self) -> &ProtocolName { - &self.name - } -} - -/// A single request received by a peer on a request-response protocol. -#[derive(Debug)] -pub struct IncomingRequest { - /// Who sent the request. - pub peer: sc_network_types::PeerId, - - /// Request sent by the remote. Will always be smaller than - /// [`ProtocolConfig::max_request_size`]. - pub payload: Vec, - - /// Channel to send back the response. - /// - /// There are two ways to indicate that handling the request failed: - /// - /// 1. Drop `pending_response` and thus not changing the reputation of the peer. - /// - /// 2. Sending an `Err(())` via `pending_response`, optionally including reputation changes for - /// the given peer. - pub pending_response: oneshot::Sender, -} - -/// Response for an incoming request to be send by a request protocol handler. -#[derive(Debug)] -pub struct OutgoingResponse { - /// The payload of the response. - /// - /// `Err(())` if none is available e.g. due an error while handling the request. - pub result: Result, ()>, - - /// Reputation changes accrued while handling the request. To be applied to the reputation of - /// the peer sending the request. - pub reputation_changes: Vec, - - /// If provided, the `oneshot::Sender` will be notified when the request has been sent to the - /// peer. - /// - /// > **Note**: Operating systems typically maintain a buffer of a few dozen kilobytes of - /// > outgoing data for each TCP socket, and it is not possible for a user - /// > application to inspect this buffer. This channel here is not actually notified - /// > when the response has been fully sent out, but rather when it has fully been - /// > written to the buffer managed by the operating system. - pub sent_feedback: Option>, -} - -/// Information stored about a pending request. -struct PendingRequest { - /// The time when the request was sent to the libp2p request-response protocol. - started_at: Instant, - /// The channel to send the response back to the caller. - /// - /// This is wrapped in an `Option` to allow for the channel to be taken out - /// on force-detected timeouts. - response_tx: Option, ProtocolName), RequestFailure>>>, - /// Fallback request to send if the primary request fails. - fallback_request: Option<(Vec, ProtocolName)>, -} - -/// When sending a request, what to do on a disconnected recipient. -#[derive(Debug, Copy, Clone, PartialEq, Eq, Hash)] -pub enum IfDisconnected { - /// Try to connect to the peer. - TryConnect, - /// Just fail if the destination is not yet connected. - ImmediateError, -} - -/// Convenience functions for `IfDisconnected`. -impl IfDisconnected { - /// Shall we connect to a disconnected peer? - pub fn should_connect(self) -> bool { - match self { - Self::TryConnect => true, - Self::ImmediateError => false, - } - } -} - -/// Event generated by the [`RequestResponsesBehaviour`]. -#[derive(Debug)] -pub enum Event { - /// A remote sent a request and either we have successfully answered it or an error happened. - /// - /// This event is generated for statistics purposes. - InboundRequest { - /// Peer which has emitted the request. - peer: PeerId, - /// Name of the protocol in question. - protocol: ProtocolName, - /// Whether handling the request was successful or unsuccessful. - /// - /// When successful contains the time elapsed between when we received the request and when - /// we sent back the response. When unsuccessful contains the failure reason. - result: Result, - }, - - /// A request initiated using [`RequestResponsesBehaviour::send_request`] has succeeded or - /// failed. - /// - /// This event is generated for statistics purposes. - RequestFinished { - /// Peer that we send a request to. - peer: PeerId, - /// Name of the protocol in question. - protocol: ProtocolName, - /// Duration the request took. - duration: Duration, - /// Result of the request. - result: Result<(), RequestFailure>, - }, - - /// A request protocol handler issued reputation changes for the given peer. - ReputationChanges { - /// Peer whose reputation needs to be adjust. - peer: PeerId, - /// Reputation changes. - changes: Vec, - }, -} - -/// Combination of a protocol name and a request id. -/// -/// Uniquely identifies an inbound or outbound request among all handled protocols. Note however -/// that uniqueness is only guaranteed between two inbound and likewise between two outbound -/// requests. There is no uniqueness guarantee in a set of both inbound and outbound -/// [`ProtocolRequestId`]s. -#[derive(Debug, Clone, PartialEq, Eq, Hash)] -struct ProtocolRequestId { - protocol: ProtocolName, - request_id: RequestId, -} - -impl From<(ProtocolName, RequestId)> for ProtocolRequestId { - fn from((protocol, request_id): (ProtocolName, RequestId)) -> Self { - Self { protocol, request_id } - } -} - -/// Details of a request-response protocol. -struct ProtocolDetails { - behaviour: Behaviour, - inbound_queue: Option>, - request_timeout: Duration, -} - -/// Implementation of `NetworkBehaviour` that provides support for request-response protocols. -pub struct RequestResponsesBehaviour { - /// The multiple sub-protocols, by name. - /// - /// Contains the underlying libp2p request-response [`Behaviour`], plus an optional - /// "response builder" used to build responses for incoming requests. - protocols: HashMap, - - /// Pending requests, passed down to a request-response [`Behaviour`], awaiting a reply. - pending_requests: HashMap, PendingRequest>, - - /// Whenever an incoming request arrives, a `Future` is added to this list and will yield the - /// start time and the response to send back to the remote. - pending_responses: stream::FuturesUnordered< - Pin> + Send>>, - >, - - /// Whenever an incoming request arrives, the arrival [`Instant`] is recorded here. - pending_responses_arrival_time: HashMap, Instant>, - - /// Whenever a response is received on `pending_responses`, insert a channel to be notified - /// when the request has been sent out. - send_feedback: HashMap, oneshot::Sender<()>>, - - /// Primarily used to get a reputation of a node. - peer_store: Arc, - - /// Interval to check that the requests are not taking too long. - /// - /// We had issues in the past where libp2p did not produce a timeout event in due time. - /// - /// For more details, see: - /// - - periodic_request_check: tokio::time::Interval, -} - -/// Generated by the response builder and waiting to be processed. -struct RequestProcessingOutcome { - peer: PeerId, - request_id: InboundRequestId, - protocol: ProtocolName, - inner_channel: ResponseChannel, ()>>, - response: OutgoingResponse, -} - -impl RequestResponsesBehaviour { - /// Creates a new behaviour. Must be passed a list of supported protocols. Returns an error if - /// the same protocol is passed twice. - pub fn new( - list: impl Iterator, - peer_store: Arc, - ) -> Result { - let mut protocols = HashMap::new(); - for protocol in list { - let cfg = Config::default().with_request_timeout(protocol.request_timeout); - - let protocol_support = if protocol.inbound_queue.is_some() { - ProtocolSupport::Full - } else { - ProtocolSupport::Outbound - }; - - let behaviour = Behaviour::with_codec( - GenericCodec { - max_request_size: protocol.max_request_size, - max_response_size: protocol.max_response_size, - }, - iter::once(protocol.name.clone()) - .chain(protocol.fallback_names) - .zip(iter::repeat(protocol_support)), - cfg, - ); - - match protocols.entry(protocol.name) { - Entry::Vacant(e) => e.insert(ProtocolDetails { - behaviour, - inbound_queue: protocol.inbound_queue, - request_timeout: protocol.request_timeout, - }), - Entry::Occupied(e) => return Err(RegisterError::DuplicateProtocol(e.key().clone())), - }; - } - - Ok(Self { - protocols, - pending_requests: Default::default(), - pending_responses: Default::default(), - pending_responses_arrival_time: Default::default(), - send_feedback: Default::default(), - peer_store, - periodic_request_check: tokio::time::interval(PERIODIC_REQUEST_CHECK), - }) - } - - /// Initiates sending a request. - /// - /// If there is no established connection to the target peer, the behavior is determined by the - /// choice of `connect`. - /// - /// An error is returned if the protocol doesn't match one that has been registered. - pub fn send_request( - &mut self, - target: &PeerId, - protocol_name: ProtocolName, - request: Vec, - fallback_request: Option<(Vec, ProtocolName)>, - pending_response: oneshot::Sender, ProtocolName), RequestFailure>>, - connect: IfDisconnected, - ) { - log::trace!(target: LOG_TARGET, "send request to {target} ({protocol_name:?}), {} bytes", request.len()); - - if let Some(ProtocolDetails { behaviour, .. }) = - self.protocols.get_mut(protocol_name.deref()) - { - Self::send_request_inner( - behaviour, - &mut self.pending_requests, - target, - protocol_name, - request, - fallback_request, - pending_response, - connect, - ) - } else if pending_response.send(Err(RequestFailure::UnknownProtocol)).is_err() { - log::debug!( - target: LOG_TARGET, - "Unknown protocol {:?}. At the same time local \ - node is no longer interested in the result.", - protocol_name, - ); - } - } - - fn send_request_inner( - behaviour: &mut Behaviour, - pending_requests: &mut HashMap, PendingRequest>, - target: &PeerId, - protocol_name: ProtocolName, - request: Vec, - fallback_request: Option<(Vec, ProtocolName)>, - pending_response: oneshot::Sender, ProtocolName), RequestFailure>>, - connect: IfDisconnected, - ) { - if behaviour.is_connected(target) || connect.should_connect() { - let request_id = behaviour.send_request(target, request); - let prev_req_id = pending_requests.insert( - (protocol_name.to_string().into(), request_id).into(), - PendingRequest { - started_at: Instant::now(), - response_tx: Some(pending_response), - fallback_request, - }, - ); - debug_assert!(prev_req_id.is_none(), "Expect request id to be unique."); - } else if pending_response.send(Err(RequestFailure::NotConnected)).is_err() { - log::debug!( - target: LOG_TARGET, - "Not connected to peer {:?}. At the same time local \ - node is no longer interested in the result.", - target, - ); - } - } -} - -impl NetworkBehaviour for RequestResponsesBehaviour { - type ConnectionHandler = - MultiHandler as NetworkBehaviour>::ConnectionHandler>; - type ToSwarm = Event; - - fn handle_pending_inbound_connection( - &mut self, - _connection_id: ConnectionId, - _local_addr: &Multiaddr, - _remote_addr: &Multiaddr, - ) -> Result<(), ConnectionDenied> { - Ok(()) - } - - fn handle_pending_outbound_connection( - &mut self, - _connection_id: ConnectionId, - _maybe_peer: Option, - _addresses: &[Multiaddr], - _effective_role: Endpoint, - ) -> Result, ConnectionDenied> { - Ok(Vec::new()) - } - - fn handle_established_inbound_connection( - &mut self, - connection_id: ConnectionId, - peer: PeerId, - local_addr: &Multiaddr, - remote_addr: &Multiaddr, - ) -> Result, ConnectionDenied> { - let iter = - self.protocols.iter_mut().filter_map(|(p, ProtocolDetails { behaviour, .. })| { - if let Ok(handler) = behaviour.handle_established_inbound_connection( - connection_id, - peer, - local_addr, - remote_addr, - ) { - Some((p.to_string(), handler)) - } else { - None - } - }); - - Ok(MultiHandler::try_from_iter(iter).expect( - "Protocols are in a HashMap and there can be at most one handler per protocol name, \ - which is the only possible error; qed", - )) - } - - fn handle_established_outbound_connection( - &mut self, - connection_id: ConnectionId, - peer: PeerId, - addr: &Multiaddr, - role_override: Endpoint, - port_use: PortUse, - ) -> Result, ConnectionDenied> { - let iter = - self.protocols.iter_mut().filter_map(|(p, ProtocolDetails { behaviour, .. })| { - if let Ok(handler) = behaviour.handle_established_outbound_connection( - connection_id, - peer, - addr, - role_override, - port_use, - ) { - Some((p.to_string(), handler)) - } else { - None - } - }); - - Ok(MultiHandler::try_from_iter(iter).expect( - "Protocols are in a HashMap and there can be at most one handler per protocol name, \ - which is the only possible error; qed", - )) - } - - fn on_swarm_event(&mut self, event: FromSwarm) { - for ProtocolDetails { behaviour, .. } in self.protocols.values_mut() { - behaviour.on_swarm_event(event); - } - } - - fn on_connection_handler_event( - &mut self, - peer_id: PeerId, - connection_id: ConnectionId, - event: THandlerOutEvent, - ) { - let p_name = event.0; - if let Some(ProtocolDetails { behaviour, .. }) = self.protocols.get_mut(p_name.as_str()) { - return behaviour.on_connection_handler_event(peer_id, connection_id, event.1) - } else { - log::warn!( - target: LOG_TARGET, - "on_connection_handler_event: no request-response instance registered for protocol {:?}", - p_name - ); - } - } - - fn poll(&mut self, cx: &mut Context) -> Poll>> { - 'poll_all: loop { - // Poll the periodic request check. - if self.periodic_request_check.poll_tick(cx).is_ready() { - self.pending_requests.retain(|id, req| { - let Some(ProtocolDetails { request_timeout, .. }) = - self.protocols.get(&id.protocol) - else { - log::warn!( - target: LOG_TARGET, - "Request {id:?} has no protocol registered.", - ); - - if let Some(response_tx) = req.response_tx.take() { - if response_tx.send(Err(RequestFailure::UnknownProtocol)).is_err() { - log::debug!( - target: LOG_TARGET, - "Request {id:?} has no protocol registered. At the same time local node is no longer interested in the result.", - ); - } - } - return false - }; - - let elapsed = req.started_at.elapsed(); - if elapsed > *request_timeout { - log::debug!( - target: LOG_TARGET, - "Request {id:?} force detected as timeout.", - ); - - if let Some(response_tx) = req.response_tx.take() { - if response_tx.send(Err(RequestFailure::Network(OutboundFailure::Timeout))).is_err() { - log::debug!( - target: LOG_TARGET, - "Request {id:?} force detected as timeout. At the same time local node is no longer interested in the result.", - ); - } - } - - false - } else { - true - } - }); - } - - // Poll to see if any response is ready to be sent back. - while let Poll::Ready(Some(outcome)) = self.pending_responses.poll_next_unpin(cx) { - let RequestProcessingOutcome { - peer, - request_id, - protocol: protocol_name, - inner_channel, - response: OutgoingResponse { result, reputation_changes, sent_feedback }, - } = match outcome { - Some(outcome) => outcome, - // The response builder was too busy or handling the request failed. This is - // later on reported as a `InboundFailure::Omission`. - None => continue, - }; - - if let Ok(payload) = result { - if let Some(ProtocolDetails { behaviour, .. }) = - self.protocols.get_mut(&*protocol_name) - { - log::trace!(target: LOG_TARGET, "send response to {peer} ({protocol_name:?}), {} bytes", payload.len()); - - if behaviour.send_response(inner_channel, Ok(payload)).is_err() { - // Note: Failure is handled further below when receiving - // `InboundFailure` event from request-response [`Behaviour`]. - log::debug!( - target: LOG_TARGET, - "Failed to send response for {:?} on protocol {:?} due to a \ - timeout or due to the connection to the peer being closed. \ - Dropping response", - request_id, protocol_name, - ); - } else if let Some(sent_feedback) = sent_feedback { - self.send_feedback - .insert((protocol_name, request_id).into(), sent_feedback); - } - } - } - - if !reputation_changes.is_empty() { - return Poll::Ready(ToSwarm::GenerateEvent(Event::ReputationChanges { - peer, - changes: reputation_changes, - })) - } - } - - let mut fallback_requests = vec![]; - - // Poll request-responses protocols. - for (protocol, ProtocolDetails { behaviour, inbound_queue, .. }) in &mut self.protocols - { - 'poll_protocol: while let Poll::Ready(ev) = behaviour.poll(cx) { - let ev = match ev { - // Main events we are interested in. - ToSwarm::GenerateEvent(ev) => ev, - - // Other events generated by the underlying behaviour are transparently - // passed through. - ToSwarm::Dial { opts } => { - if opts.get_peer_id().is_none() { - log::error!( - target: LOG_TARGET, - "The request-response isn't supposed to start dialing addresses" - ); - } - return Poll::Ready(ToSwarm::Dial { opts }) - }, - event => { - return Poll::Ready( - event.map_in(|event| ((*protocol).to_string(), event)).map_out( - |_| { - unreachable!( - "`GenerateEvent` is handled in a branch above; qed" - ) - }, - ), - ); - }, - }; - - match ev { - // Received a request from a remote. - request_response::Event::Message { - peer, - message: Message::Request { request_id, request, channel, .. }, - } => { - self.pending_responses_arrival_time - .insert((protocol.clone(), request_id).into(), Instant::now()); - - let reputation = self.peer_store.peer_reputation(&peer.into()); - - if reputation < BANNED_THRESHOLD { - log::debug!( - target: LOG_TARGET, - "Cannot handle requests from a node with a low reputation {}: {}", - peer, - reputation, - ); - continue 'poll_protocol - } - - let (tx, rx) = oneshot::channel(); - - // Submit the request to the "response builder" passed by the user at - // initialization. - if let Some(resp_builder) = inbound_queue { - // If the response builder is too busy, silently drop `tx`. This - // will be reported by the corresponding request-response - // [`Behaviour`] through an `InboundFailure::Omission` event. - // Note that we use `async_channel::bounded` and not `mpsc::channel` - // because the latter allocates an extra slot for every cloned - // sender. - let _ = resp_builder.try_send(IncomingRequest { - peer: peer.into(), - payload: request, - pending_response: tx, - }); - } else { - debug_assert!(false, "Received message on outbound-only protocol."); - } - - let protocol = protocol.clone(); - - self.pending_responses.push(Box::pin(async move { - // The `tx` created above can be dropped if we are not capable of - // processing this request, which is reflected as a - // `InboundFailure::Omission` event. - rx.await.map_or(None, |response| { - Some(RequestProcessingOutcome { - peer, - request_id, - protocol, - inner_channel: channel, - response, - }) - }) - })); - - // This `continue` makes sure that `pending_responses` gets polled - // after we have added the new element. - continue 'poll_all - }, - - // Received a response from a remote to one of our requests. - request_response::Event::Message { - peer, - message: Message::Response { request_id, response }, - .. - } => { - let (started, delivered) = match self - .pending_requests - .remove(&(protocol.clone(), request_id).into()) - { - Some(PendingRequest { - started_at, - response_tx: Some(response_tx), - .. - }) => { - log::trace!( - target: LOG_TARGET, - "received response from {peer} ({protocol:?}), {} bytes", - response.as_ref().map_or(0usize, |response| response.len()), - ); - - let delivered = response_tx - .send( - response - .map_err(|()| RequestFailure::Refused) - .map(|resp| (resp, protocol.clone())), - ) - .map_err(|_| RequestFailure::Obsolete); - (started_at, delivered) - }, - _ => { - log::debug!( - target: LOG_TARGET, - "Received `RequestResponseEvent::Message` with unexpected request id {:?} from {:?}", - request_id, - peer, - ); - continue - }, - }; - - let out = Event::RequestFinished { - peer, - protocol: protocol.clone(), - duration: started.elapsed(), - result: delivered, - }; - - return Poll::Ready(ToSwarm::GenerateEvent(out)) - }, - - // One of our requests has failed. - request_response::Event::OutboundFailure { - peer, - request_id, - error, - .. - } => { - let error = OutboundFailure::from(error); - let started = match self - .pending_requests - .remove(&(protocol.clone(), request_id).into()) - { - Some(PendingRequest { - started_at, - response_tx: Some(response_tx), - fallback_request, - }) => { - // Try using the fallback request if the protocol was not - // supported. - if matches!(error, OutboundFailure::UnsupportedProtocols) { - if let Some((fallback_request, fallback_protocol)) = - fallback_request - { - log::trace!( - target: LOG_TARGET, - "Request with id {:?} failed. Trying the fallback protocol. {}", - request_id, - fallback_protocol.deref() - ); - fallback_requests.push(( - peer, - fallback_protocol, - fallback_request, - response_tx, - )); - continue - } - } - - if response_tx - .send(Err(RequestFailure::Network(error.clone()))) - .is_err() - { - log::debug!( - target: LOG_TARGET, - "Request with id {:?} failed. At the same time local \ - node is no longer interested in the result.", - request_id, - ); - } - started_at - }, - _ => { - log::debug!( - target: LOG_TARGET, - "Received `RequestResponseEvent::OutboundFailure` with unexpected request id {:?} error {:?} from {:?}", - request_id, - error, - peer - ); - continue - }, - }; - - let out = Event::RequestFinished { - peer, - protocol: protocol.clone(), - duration: started.elapsed(), - result: Err(RequestFailure::Network(error)), - }; - - return Poll::Ready(ToSwarm::GenerateEvent(out)) - }, - - // An inbound request failed, either while reading the request or due to - // failing to send a response. - request_response::Event::InboundFailure { - request_id, peer, error, .. - } => { - self.pending_responses_arrival_time - .remove(&(protocol.clone(), request_id).into()); - self.send_feedback.remove(&(protocol.clone(), request_id).into()); - let out = Event::InboundRequest { - peer, - protocol: protocol.clone(), - result: Err(ResponseFailure::Network(error.into())), - }; - return Poll::Ready(ToSwarm::GenerateEvent(out)) - }, - - // A response to an inbound request has been sent. - request_response::Event::ResponseSent { request_id, peer } => { - let arrival_time = self - .pending_responses_arrival_time - .remove(&(protocol.clone(), request_id).into()) - .map(|t| t.elapsed()) - .expect( - "Time is added for each inbound request on arrival and only \ - removed on success (`ResponseSent`) or failure \ - (`InboundFailure`). One can not receive a success event for a \ - request that either never arrived, or that has previously \ - failed; qed.", - ); - - if let Some(send_feedback) = - self.send_feedback.remove(&(protocol.clone(), request_id).into()) - { - let _ = send_feedback.send(()); - } - - let out = Event::InboundRequest { - peer, - protocol: protocol.clone(), - result: Ok(arrival_time), - }; - - return Poll::Ready(ToSwarm::GenerateEvent(out)) - }, - }; - } - } - - // Send out fallback requests. - for (peer, protocol, request, pending_response) in fallback_requests.drain(..) { - if let Some(ProtocolDetails { behaviour, .. }) = self.protocols.get_mut(&protocol) { - Self::send_request_inner( - behaviour, - &mut self.pending_requests, - &peer, - protocol, - request, - None, - pending_response, - // We can error if not connected because the - // previous attempt would have tried to establish a - // connection already or errored and we wouldn't have gotten here. - IfDisconnected::ImmediateError, - ); - } - } - - break Poll::Pending - } - } -} - -/// Error when registering a protocol. -#[derive(Debug, thiserror::Error)] -pub enum RegisterError { - /// A protocol has been specified multiple times. - #[error("{0}")] - DuplicateProtocol(ProtocolName), -} - -/// Error when processing a request sent by a remote. -#[derive(Debug, thiserror::Error)] -pub enum ResponseFailure { - /// Problem on the network. - #[error("Problem on the network: {0}")] - Network(InboundFailure), -} - -/// Implements the libp2p [`Codec`] trait. Defines how streams of bytes are turned -/// into requests and responses and vice-versa. -#[derive(Debug, Clone)] -#[doc(hidden)] // Needs to be public in order to satisfy the Rust compiler. -pub struct GenericCodec { - max_request_size: u64, - max_response_size: u64, -} - -#[async_trait::async_trait] -impl Codec for GenericCodec { - type Protocol = ProtocolName; - type Request = Vec; - type Response = Result, ()>; - - async fn read_request( - &mut self, - _: &Self::Protocol, - mut io: &mut T, - ) -> io::Result - where - T: AsyncRead + Unpin + Send, - { - // Read the length. - let length = unsigned_varint::aio::read_usize(&mut io) - .await - .map_err(|err| io::Error::new(io::ErrorKind::InvalidInput, err))?; - if length > usize::try_from(self.max_request_size).unwrap_or(usize::MAX) { - return Err(io::Error::new( - io::ErrorKind::InvalidInput, - format!("Request size exceeds limit: {} > {}", length, self.max_request_size), - )) - } - - // Read the payload. - let mut buffer = vec![0; length]; - io.read_exact(&mut buffer).await?; - Ok(buffer) - } - - async fn read_response( - &mut self, - _: &Self::Protocol, - mut io: &mut T, - ) -> io::Result - where - T: AsyncRead + Unpin + Send, - { - // Note that this function returns a `Result>`. Returning an `Err` is - // considered as a protocol error and will result in the entire connection being closed. - // Returning `Ok(Err(_))` signifies that a response has successfully been fetched, and - // that this response is an error. - - // Read the length. - let length = match unsigned_varint::aio::read_usize(&mut io).await { - Ok(l) => l, - Err(unsigned_varint::io::ReadError::Io(err)) - if matches!(err.kind(), io::ErrorKind::UnexpectedEof) => - return Ok(Err(())), - Err(err) => return Err(io::Error::new(io::ErrorKind::InvalidInput, err)), - }; - - if length > usize::try_from(self.max_response_size).unwrap_or(usize::MAX) { - return Err(io::Error::new( - io::ErrorKind::InvalidInput, - format!("Response size exceeds limit: {} > {}", length, self.max_response_size), - )) - } - - // Read the payload. - let mut buffer = vec![0; length]; - io.read_exact(&mut buffer).await?; - Ok(Ok(buffer)) - } - - async fn write_request( - &mut self, - _: &Self::Protocol, - io: &mut T, - req: Self::Request, - ) -> io::Result<()> - where - T: AsyncWrite + Unpin + Send, - { - // TODO: check the length? - // Write the length. - { - let mut buffer = unsigned_varint::encode::usize_buffer(); - io.write_all(unsigned_varint::encode::usize(req.len(), &mut buffer)).await?; - } - - // Write the payload. - io.write_all(&req).await?; - - io.close().await?; - Ok(()) - } - - async fn write_response( - &mut self, - _: &Self::Protocol, - io: &mut T, - res: Self::Response, - ) -> io::Result<()> - where - T: AsyncWrite + Unpin + Send, - { - // If `res` is an `Err`, we jump to closing the substream without writing anything on it. - if let Ok(res) = res { - // TODO: check the length? - // Write the length. - { - let mut buffer = unsigned_varint::encode::usize_buffer(); - io.write_all(unsigned_varint::encode::usize(res.len(), &mut buffer)).await?; - } - - // Write the payload. - io.write_all(&res).await?; - } - - io.close().await?; - Ok(()) - } -} - -#[cfg(test)] -mod tests { - use super::*; - - use crate::mock::MockPeerStore; - use assert_matches::assert_matches; - use futures::channel::oneshot; - use libp2p::{ - core::{ - transport::{MemoryTransport, Transport}, - upgrade, - }, - identity::Keypair, - noise, - swarm::{Config as SwarmConfig, Executor, Swarm, SwarmEvent}, - Multiaddr, - }; - use std::{iter, time::Duration}; - - struct TokioExecutor; - impl Executor for TokioExecutor { - fn exec(&self, f: Pin + Send>>) { - tokio::spawn(f); - } - } - - fn build_swarm( - list: impl Iterator, - ) -> (Swarm, Multiaddr) { - let keypair = Keypair::generate_ed25519(); - - let transport = MemoryTransport::new() - .upgrade(upgrade::Version::V1) - .authenticate(noise::Config::new(&keypair).unwrap()) - .multiplex(libp2p::yamux::Config::default()) - .boxed(); - - let behaviour = RequestResponsesBehaviour::new(list, Arc::new(MockPeerStore {})).unwrap(); - - let mut swarm = Swarm::new( - transport, - behaviour, - keypair.public().to_peer_id(), - SwarmConfig::with_executor(TokioExecutor {}) - // This is taken care of by notification protocols in non-test environment - // It is very slow in test environment for some reason, hence larger timeout - .with_idle_connection_timeout(Duration::from_secs(10)), - ); - - let listen_addr: Multiaddr = format!("/memory/{}", rand::random::()).parse().unwrap(); - - swarm.listen_on(listen_addr.clone()).unwrap(); - - (swarm, listen_addr) - } - - #[tokio::test] - async fn basic_request_response_works() { - let protocol_name = ProtocolName::from("/test/req-resp/1"); - - // Build swarms whose behaviour is [`RequestResponsesBehaviour`]. - let mut swarms = (0..2) - .map(|_| { - let (tx, mut rx) = async_channel::bounded::(64); - - tokio::spawn(async move { - while let Some(rq) = rx.next().await { - let (fb_tx, fb_rx) = oneshot::channel(); - assert_eq!(rq.payload, b"this is a request"); - let _ = rq.pending_response.send(super::OutgoingResponse { - result: Ok(b"this is a response".to_vec()), - reputation_changes: Vec::new(), - sent_feedback: Some(fb_tx), - }); - fb_rx.await.unwrap(); - } - }); - - let protocol_config = ProtocolConfig { - name: protocol_name.clone(), - fallback_names: Vec::new(), - max_request_size: 1024, - max_response_size: 1024 * 1024, - request_timeout: Duration::from_secs(30), - inbound_queue: Some(tx), - }; - - build_swarm(iter::once(protocol_config)) - }) - .collect::>(); - - // Ask `swarm[0]` to dial `swarm[1]`. There isn't any discovery mechanism in place in - // this test, so they wouldn't connect to each other. - { - let dial_addr = swarms[1].1.clone(); - Swarm::dial(&mut swarms[0].0, dial_addr).unwrap(); - } - - let (mut swarm, _) = swarms.remove(0); - // Running `swarm[0]` in the background. - tokio::spawn(async move { - loop { - match swarm.select_next_some().await { - SwarmEvent::Behaviour(Event::InboundRequest { result, .. }) => { - result.unwrap(); - }, - _ => {}, - } - } - }); - - // Remove and run the remaining swarm. - let (mut swarm, _) = swarms.remove(0); - let mut response_receiver = None; - - loop { - match swarm.select_next_some().await { - SwarmEvent::ConnectionEstablished { peer_id, .. } => { - let (sender, receiver) = oneshot::channel(); - swarm.behaviour_mut().send_request( - &peer_id, - protocol_name.clone(), - b"this is a request".to_vec(), - None, - sender, - IfDisconnected::ImmediateError, - ); - assert!(response_receiver.is_none()); - response_receiver = Some(receiver); - }, - SwarmEvent::Behaviour(Event::RequestFinished { result, .. }) => { - result.unwrap(); - break - }, - _ => {}, - } - } - - assert_eq!( - response_receiver.unwrap().await.unwrap().unwrap(), - (b"this is a response".to_vec(), protocol_name) - ); - } - - #[tokio::test] - async fn max_response_size_exceeded() { - let protocol_name = ProtocolName::from("/test/req-resp/1"); - - // Build swarms whose behaviour is [`RequestResponsesBehaviour`]. - let mut swarms = (0..2) - .map(|_| { - let (tx, mut rx) = async_channel::bounded::(64); - - tokio::spawn(async move { - while let Some(rq) = rx.next().await { - assert_eq!(rq.payload, b"this is a request"); - let _ = rq.pending_response.send(super::OutgoingResponse { - result: Ok(b"this response exceeds the limit".to_vec()), - reputation_changes: Vec::new(), - sent_feedback: None, - }); - } - }); - - let protocol_config = ProtocolConfig { - name: protocol_name.clone(), - fallback_names: Vec::new(), - max_request_size: 1024, - max_response_size: 8, // <-- important for the test - request_timeout: Duration::from_secs(30), - inbound_queue: Some(tx), - }; - - build_swarm(iter::once(protocol_config)) - }) - .collect::>(); - - // Ask `swarm[0]` to dial `swarm[1]`. There isn't any discovery mechanism in place in - // this test, so they wouldn't connect to each other. - { - let dial_addr = swarms[1].1.clone(); - Swarm::dial(&mut swarms[0].0, dial_addr).unwrap(); - } - - // Running `swarm[0]` in the background until a `InboundRequest` event happens, - // which is a hint about the test having ended. - let (mut swarm, _) = swarms.remove(0); - tokio::spawn(async move { - loop { - match swarm.select_next_some().await { - SwarmEvent::Behaviour(Event::InboundRequest { result, .. }) => { - assert!(result.is_ok()); - }, - SwarmEvent::ConnectionClosed { .. } => { - break; - }, - _ => {}, - } - } - }); - - // Remove and run the remaining swarm. - let (mut swarm, _) = swarms.remove(0); - - let mut response_receiver = None; - - loop { - match swarm.select_next_some().await { - SwarmEvent::ConnectionEstablished { peer_id, .. } => { - let (sender, receiver) = oneshot::channel(); - swarm.behaviour_mut().send_request( - &peer_id, - protocol_name.clone(), - b"this is a request".to_vec(), - None, - sender, - IfDisconnected::ImmediateError, - ); - assert!(response_receiver.is_none()); - response_receiver = Some(receiver); - }, - SwarmEvent::Behaviour(Event::RequestFinished { result, .. }) => { - assert!(result.is_err()); - break - }, - _ => {}, - } - } - - match response_receiver.unwrap().await.unwrap().unwrap_err() { - RequestFailure::Network(OutboundFailure::Io(_)) => {}, - request_failure => panic!("Unexpected failure: {request_failure:?}"), - } - } - - /// A `RequestId` is a unique identifier among either all inbound or all outbound requests for - /// a single [`RequestResponsesBehaviour`] behaviour. It is not guaranteed to be unique across - /// multiple [`RequestResponsesBehaviour`] behaviours. Thus, when handling `RequestId` in the - /// context of multiple [`RequestResponsesBehaviour`] behaviours, one needs to couple the - /// protocol name with the `RequestId` to get a unique request identifier. - /// - /// This test ensures that two requests on different protocols can be handled concurrently - /// without a `RequestId` collision. - /// - /// See [`ProtocolRequestId`] for additional information. - #[tokio::test] - async fn request_id_collision() { - let protocol_name_1 = ProtocolName::from("/test/req-resp-1/1"); - let protocol_name_2 = ProtocolName::from("/test/req-resp-2/1"); - - let mut swarm_1 = { - let protocol_configs = vec![ - ProtocolConfig { - name: protocol_name_1.clone(), - fallback_names: Vec::new(), - max_request_size: 1024, - max_response_size: 1024 * 1024, - request_timeout: Duration::from_secs(30), - inbound_queue: None, - }, - ProtocolConfig { - name: protocol_name_2.clone(), - fallback_names: Vec::new(), - max_request_size: 1024, - max_response_size: 1024 * 1024, - request_timeout: Duration::from_secs(30), - inbound_queue: None, - }, - ]; - - build_swarm(protocol_configs.into_iter()).0 - }; - - let (mut swarm_2, mut swarm_2_handler_1, mut swarm_2_handler_2, listen_add_2) = { - let (tx_1, rx_1) = async_channel::bounded(64); - let (tx_2, rx_2) = async_channel::bounded(64); - - let protocol_configs = vec![ - ProtocolConfig { - name: protocol_name_1.clone(), - fallback_names: Vec::new(), - max_request_size: 1024, - max_response_size: 1024 * 1024, - request_timeout: Duration::from_secs(30), - inbound_queue: Some(tx_1), - }, - ProtocolConfig { - name: protocol_name_2.clone(), - fallback_names: Vec::new(), - max_request_size: 1024, - max_response_size: 1024 * 1024, - request_timeout: Duration::from_secs(30), - inbound_queue: Some(tx_2), - }, - ]; - - let (swarm, listen_addr) = build_swarm(protocol_configs.into_iter()); - - (swarm, rx_1, rx_2, listen_addr) - }; - - // Ask swarm 1 to dial swarm 2. There isn't any discovery mechanism in place in this test, - // so they wouldn't connect to each other. - swarm_1.dial(listen_add_2).unwrap(); - - // Run swarm 2 in the background, receiving two requests. - tokio::spawn(async move { - loop { - match swarm_2.select_next_some().await { - SwarmEvent::Behaviour(Event::InboundRequest { result, .. }) => { - result.unwrap(); - }, - _ => {}, - } - } - }); - - // Handle both requests sent by swarm 1 to swarm 2 in the background. - // - // Make sure both requests overlap, by answering the first only after receiving the - // second. - tokio::spawn(async move { - let protocol_1_request = swarm_2_handler_1.next().await; - let protocol_2_request = swarm_2_handler_2.next().await; - - protocol_1_request - .unwrap() - .pending_response - .send(OutgoingResponse { - result: Ok(b"this is a response".to_vec()), - reputation_changes: Vec::new(), - sent_feedback: None, - }) - .unwrap(); - protocol_2_request - .unwrap() - .pending_response - .send(OutgoingResponse { - result: Ok(b"this is a response".to_vec()), - reputation_changes: Vec::new(), - sent_feedback: None, - }) - .unwrap(); - }); - - // Have swarm 1 send two requests to swarm 2 and await responses. - - let mut response_receivers = None; - let mut num_responses = 0; - - loop { - match swarm_1.select_next_some().await { - SwarmEvent::ConnectionEstablished { peer_id, .. } => { - let (sender_1, receiver_1) = oneshot::channel(); - let (sender_2, receiver_2) = oneshot::channel(); - swarm_1.behaviour_mut().send_request( - &peer_id, - protocol_name_1.clone(), - b"this is a request".to_vec(), - None, - sender_1, - IfDisconnected::ImmediateError, - ); - swarm_1.behaviour_mut().send_request( - &peer_id, - protocol_name_2.clone(), - b"this is a request".to_vec(), - None, - sender_2, - IfDisconnected::ImmediateError, - ); - assert!(response_receivers.is_none()); - response_receivers = Some((receiver_1, receiver_2)); - }, - SwarmEvent::Behaviour(Event::RequestFinished { result, .. }) => { - num_responses += 1; - result.unwrap(); - if num_responses == 2 { - break - } - }, - _ => {}, - } - } - let (response_receiver_1, response_receiver_2) = response_receivers.unwrap(); - assert_eq!( - response_receiver_1.await.unwrap().unwrap(), - (b"this is a response".to_vec(), protocol_name_1) - ); - assert_eq!( - response_receiver_2.await.unwrap().unwrap(), - (b"this is a response".to_vec(), protocol_name_2) - ); - } - - #[tokio::test] - async fn request_fallback() { - let protocol_name_1 = ProtocolName::from("/test/req-resp/2"); - let protocol_name_1_fallback = ProtocolName::from("/test/req-resp/1"); - let protocol_name_2 = ProtocolName::from("/test/another"); - - let protocol_config_1 = ProtocolConfig { - name: protocol_name_1.clone(), - fallback_names: Vec::new(), - max_request_size: 1024, - max_response_size: 1024 * 1024, - request_timeout: Duration::from_secs(30), - inbound_queue: None, - }; - let protocol_config_1_fallback = ProtocolConfig { - name: protocol_name_1_fallback.clone(), - fallback_names: Vec::new(), - max_request_size: 1024, - max_response_size: 1024 * 1024, - request_timeout: Duration::from_secs(30), - inbound_queue: None, - }; - let protocol_config_2 = ProtocolConfig { - name: protocol_name_2.clone(), - fallback_names: Vec::new(), - max_request_size: 1024, - max_response_size: 1024 * 1024, - request_timeout: Duration::from_secs(30), - inbound_queue: None, - }; - - // This swarm only speaks protocol_name_1_fallback and protocol_name_2. - // It only responds to requests. - let mut older_swarm = { - let (tx_1, mut rx_1) = async_channel::bounded::(64); - let (tx_2, mut rx_2) = async_channel::bounded::(64); - let mut protocol_config_1_fallback = protocol_config_1_fallback.clone(); - protocol_config_1_fallback.inbound_queue = Some(tx_1); - - let mut protocol_config_2 = protocol_config_2.clone(); - protocol_config_2.inbound_queue = Some(tx_2); - - tokio::spawn(async move { - for _ in 0..2 { - if let Some(rq) = rx_1.next().await { - let (fb_tx, fb_rx) = oneshot::channel(); - assert_eq!(rq.payload, b"request on protocol /test/req-resp/1"); - let _ = rq.pending_response.send(super::OutgoingResponse { - result: Ok(b"this is a response on protocol /test/req-resp/1".to_vec()), - reputation_changes: Vec::new(), - sent_feedback: Some(fb_tx), - }); - fb_rx.await.unwrap(); - } - } - - if let Some(rq) = rx_2.next().await { - let (fb_tx, fb_rx) = oneshot::channel(); - assert_eq!(rq.payload, b"request on protocol /test/other"); - let _ = rq.pending_response.send(super::OutgoingResponse { - result: Ok(b"this is a response on protocol /test/other".to_vec()), - reputation_changes: Vec::new(), - sent_feedback: Some(fb_tx), - }); - fb_rx.await.unwrap(); - } - }); - - build_swarm(vec![protocol_config_1_fallback, protocol_config_2].into_iter()) - }; - - // This swarm speaks all protocols. - let mut new_swarm = build_swarm( - vec![ - protocol_config_1.clone(), - protocol_config_1_fallback.clone(), - protocol_config_2.clone(), - ] - .into_iter(), - ); - - { - let dial_addr = older_swarm.1.clone(); - Swarm::dial(&mut new_swarm.0, dial_addr).unwrap(); - } - - // Running `older_swarm`` in the background. - tokio::spawn(async move { - loop { - _ = older_swarm.0.select_next_some().await; - } - }); - - // Run the newer swarm. Attempt to make requests on all protocols. - let (mut swarm, _) = new_swarm; - let mut older_peer_id = None; - - let mut response_receiver = None; - // Try the new protocol with a fallback. - loop { - match swarm.select_next_some().await { - SwarmEvent::ConnectionEstablished { peer_id, .. } => { - older_peer_id = Some(peer_id); - let (sender, receiver) = oneshot::channel(); - swarm.behaviour_mut().send_request( - &peer_id, - protocol_name_1.clone(), - b"request on protocol /test/req-resp/2".to_vec(), - Some(( - b"request on protocol /test/req-resp/1".to_vec(), - protocol_config_1_fallback.name.clone(), - )), - sender, - IfDisconnected::ImmediateError, - ); - response_receiver = Some(receiver); - }, - SwarmEvent::Behaviour(Event::RequestFinished { result, .. }) => { - result.unwrap(); - break - }, - _ => {}, - } - } - assert_eq!( - response_receiver.unwrap().await.unwrap().unwrap(), - ( - b"this is a response on protocol /test/req-resp/1".to_vec(), - protocol_name_1_fallback.clone() - ) - ); - // Try the old protocol with a useless fallback. - let (sender, response_receiver) = oneshot::channel(); - swarm.behaviour_mut().send_request( - older_peer_id.as_ref().unwrap(), - protocol_name_1_fallback.clone(), - b"request on protocol /test/req-resp/1".to_vec(), - Some(( - b"dummy request, will fail if processed".to_vec(), - protocol_config_1_fallback.name.clone(), - )), - sender, - IfDisconnected::ImmediateError, - ); - loop { - match swarm.select_next_some().await { - SwarmEvent::Behaviour(Event::RequestFinished { result, .. }) => { - result.unwrap(); - break - }, - _ => {}, - } - } - assert_eq!( - response_receiver.await.unwrap().unwrap(), - ( - b"this is a response on protocol /test/req-resp/1".to_vec(), - protocol_name_1_fallback.clone() - ) - ); - // Try the new protocol with no fallback. Should fail. - let (sender, response_receiver) = oneshot::channel(); - swarm.behaviour_mut().send_request( - older_peer_id.as_ref().unwrap(), - protocol_name_1.clone(), - b"request on protocol /test/req-resp-2".to_vec(), - None, - sender, - IfDisconnected::ImmediateError, - ); - loop { - match swarm.select_next_some().await { - SwarmEvent::Behaviour(Event::RequestFinished { result, .. }) => { - assert_matches!( - result.unwrap_err(), - RequestFailure::Network(OutboundFailure::UnsupportedProtocols) - ); - break - }, - _ => {}, - } - } - assert!(response_receiver.await.unwrap().is_err()); - // Try the other protocol with no fallback. - let (sender, response_receiver) = oneshot::channel(); - swarm.behaviour_mut().send_request( - older_peer_id.as_ref().unwrap(), - protocol_name_2.clone(), - b"request on protocol /test/other".to_vec(), - None, - sender, - IfDisconnected::ImmediateError, - ); - loop { - match swarm.select_next_some().await { - SwarmEvent::Behaviour(Event::RequestFinished { result, .. }) => { - result.unwrap(); - break - }, - _ => {}, - } - } - assert_eq!( - response_receiver.await.unwrap().unwrap(), - (b"this is a response on protocol /test/other".to_vec(), protocol_name_2.clone()) - ); - } - - /// This test ensures the `RequestResponsesBehaviour` propagates back the Request::Timeout error - /// even if the libp2p component hangs. - /// - /// For testing purposes, the communication happens on the `/test/req-resp/1` protocol. - /// - /// This is achieved by: - /// - Two swarms are connected, the first one is slow to respond and has the timeout set to 10 - /// seconds. The second swarm is configured with a timeout of 10 seconds in libp2p, however in - /// substrate this is set to 1 second. - /// - /// - The first swarm introduces a delay of 2 seconds before responding to the request. - /// - /// - The second swarm must enforce the 1 second timeout. - #[tokio::test] - async fn enforce_outbound_timeouts() { - const REQUEST_TIMEOUT: Duration = Duration::from_secs(10); - const REQUEST_TIMEOUT_SHORT: Duration = Duration::from_secs(1); - - // These swarms only speaks protocol_name. - let protocol_name = ProtocolName::from("/test/req-resp/1"); - - let protocol_config = ProtocolConfig { - name: protocol_name.clone(), - fallback_names: Vec::new(), - max_request_size: 1024, - max_response_size: 1024 * 1024, - request_timeout: REQUEST_TIMEOUT, // <-- important for the test - inbound_queue: None, - }; - - // Build swarms whose behaviour is [`RequestResponsesBehaviour`]. - let (mut first_swarm, _) = { - let (tx, mut rx) = async_channel::bounded::(64); - - tokio::spawn(async move { - if let Some(rq) = rx.next().await { - assert_eq!(rq.payload, b"this is a request"); - - // Sleep for more than `REQUEST_TIMEOUT_SHORT` and less than - // `REQUEST_TIMEOUT`. - tokio::time::sleep(REQUEST_TIMEOUT_SHORT * 2).await; - - // By the time the response is sent back, the second swarm - // received Timeout. - let _ = rq.pending_response.send(super::OutgoingResponse { - result: Ok(b"Second swarm already timedout".to_vec()), - reputation_changes: Vec::new(), - sent_feedback: None, - }); - } - }); - - let mut protocol_config = protocol_config.clone(); - protocol_config.inbound_queue = Some(tx); - - build_swarm(iter::once(protocol_config)) - }; - - let (mut second_swarm, second_address) = { - let (tx, mut rx) = async_channel::bounded::(64); - - tokio::spawn(async move { - while let Some(rq) = rx.next().await { - let _ = rq.pending_response.send(super::OutgoingResponse { - result: Ok(b"This is the response".to_vec()), - reputation_changes: Vec::new(), - sent_feedback: None, - }); - } - }); - let mut protocol_config = protocol_config.clone(); - protocol_config.inbound_queue = Some(tx); - - build_swarm(iter::once(protocol_config.clone())) - }; - // Modify the second swarm to have a shorter timeout. - second_swarm - .behaviour_mut() - .protocols - .get_mut(&protocol_name) - .unwrap() - .request_timeout = REQUEST_TIMEOUT_SHORT; - - // Ask first swarm to dial the second swarm. - { - Swarm::dial(&mut first_swarm, second_address).unwrap(); - } - - // Running the first swarm in the background until a `InboundRequest` event happens, - // which is a hint about the test having ended. - tokio::spawn(async move { - loop { - let event = first_swarm.select_next_some().await; - match event { - SwarmEvent::Behaviour(Event::InboundRequest { result, .. }) => { - assert!(result.is_ok()); - break; - }, - SwarmEvent::ConnectionClosed { .. } => { - break; - }, - _ => {}, - } - } - }); - - // Run the second swarm. - // - on connection established send the request to the first swarm - // - expect to receive a timeout - let mut response_receiver = None; - loop { - let event = second_swarm.select_next_some().await; - - match event { - SwarmEvent::ConnectionEstablished { peer_id, .. } => { - let (sender, receiver) = oneshot::channel(); - second_swarm.behaviour_mut().send_request( - &peer_id, - protocol_name.clone(), - b"this is a request".to_vec(), - None, - sender, - IfDisconnected::ImmediateError, - ); - assert!(response_receiver.is_none()); - response_receiver = Some(receiver); - }, - SwarmEvent::ConnectionClosed { .. } => { - break; - }, - SwarmEvent::Behaviour(Event::RequestFinished { result, .. }) => { - assert!(result.is_err()); - break - }, - _ => {}, - } - } - - // Expect the timeout. - match response_receiver.unwrap().await.unwrap().unwrap_err() { - RequestFailure::Network(OutboundFailure::Timeout) => {}, - request_failure => panic!("Unexpected failure: {request_failure:?}"), - } - } -} From 6f094d980cf011c5bf06524bdb7daaf8a4b36920 Mon Sep 17 00:00:00 2001 From: illuzen Date: Mon, 1 Jun 2026 16:08:07 +0800 Subject: [PATCH 25/26] fmt --- .../protocol/notification/tests/substream_validation.rs | 4 ++-- client/litep2p/src/transport/manager/mod.rs | 8 +++----- 2 files changed, 5 insertions(+), 7 deletions(-) diff --git a/client/litep2p/src/protocol/notification/tests/substream_validation.rs b/client/litep2p/src/protocol/notification/tests/substream_validation.rs index 8985a3e7..0a87312c 100644 --- a/client/litep2p/src/protocol/notification/tests/substream_validation.rs +++ b/client/litep2p/src/protocol/notification/tests/substream_validation.rs @@ -18,6 +18,8 @@ // FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER // DEALINGS IN THE SOFTWARE. +#[cfg(debug_assertions)] +use crate::protocol::notification::PeerContext; use crate::{ error::{Error, SubstreamError}, mock::substream::MockSubstream, @@ -36,8 +38,6 @@ use crate::{ types::{protocol::ProtocolName, ConnectionId, SubstreamId}, PeerId, }; -#[cfg(debug_assertions)] -use crate::protocol::notification::PeerContext; use bytes::BytesMut; use futures::StreamExt; diff --git a/client/litep2p/src/transport/manager/mod.rs b/client/litep2p/src/transport/manager/mod.rs index b5d5047c..a7633964 100644 --- a/client/litep2p/src/transport/manager/mod.rs +++ b/client/litep2p/src/transport/manager/mod.rs @@ -1419,13 +1419,11 @@ mod tests { use multihash::Multihash; use super::*; - use crate::{ - crypto::dilithium::Keypair, - executor::DefaultExecutor, - transport::dummy::DummyTransport, - }; #[cfg(debug_assertions)] use crate::transport::KEEP_ALIVE_TIMEOUT; + use crate::{ + crypto::dilithium::Keypair, executor::DefaultExecutor, transport::dummy::DummyTransport, + }; #[cfg(feature = "websocket")] use std::borrow::Cow; use std::{ From 7ccc890f1815de17c5a775cab563610bd40c9622 Mon Sep 17 00:00:00 2001 From: illuzen Date: Mon, 1 Jun 2026 17:31:59 +0800 Subject: [PATCH 26/26] fix tests --- client/network/src/config.rs | 6 +++++- client/network/src/lib.rs | 2 +- client/network/src/service/traits.rs | 14 ++++++++++++++ 3 files changed, 20 insertions(+), 2 deletions(-) diff --git a/client/network/src/config.rs b/client/network/src/config.rs index 108f8b06..90055f7b 100644 --- a/client/network/src/config.rs +++ b/client/network/src/config.rs @@ -29,9 +29,13 @@ pub use crate::{ DEFAULT_KADEMLIA_REPLICATION_FACTOR, }, peer_store::PeerStoreProvider, + // Re-export request-response types for compatibility with polkadot-node-network-protocol + request_responses::{IncomingRequest, OutgoingResponse, RequestResponseConfig}, service::{ metrics::NotificationMetrics, - traits::{NotificationConfig, NotificationService, PeerStore}, + traits::{ + NotificationConfig, NotificationService, OutboundFailure, PeerStore, RequestFailure, + }, }, types::ProtocolName, }; diff --git a/client/network/src/lib.rs b/client/network/src/lib.rs index db1fd334..99826e1d 100644 --- a/client/network/src/lib.rs +++ b/client/network/src/lib.rs @@ -284,7 +284,7 @@ pub mod request_responses { } pub use event::{DhtEvent, Event}; -pub use request_responses::{IfDisconnected, RequestFailure}; +pub use request_responses::{IfDisconnected, OutboundFailure, RequestFailure}; pub use sc_network_common::{ role::{ObservedRole, Roles}, types::ReputationChange, diff --git a/client/network/src/service/traits.rs b/client/network/src/service/traits.rs index d8d7bc17..07d6df8a 100644 --- a/client/network/src/service/traits.rs +++ b/client/network/src/service/traits.rs @@ -99,6 +99,20 @@ pub enum RequestFailure { Network(OutboundFailure), } +impl std::fmt::Display for RequestFailure { + fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result { + match self { + RequestFailure::NotConnected => write!(f, "Not connected"), + RequestFailure::UnknownProtocol => write!(f, "Unknown protocol"), + RequestFailure::Refused => write!(f, "Refused"), + RequestFailure::Obsolete => write!(f, "Obsolete"), + RequestFailure::Network(e) => write!(f, "Network error: {:?}", e), + } + } +} + +impl std::error::Error for RequestFailure {} + /// If disconnected - describes what happens when trying to send to a disconnected peer. #[derive(Debug, Copy, Clone, PartialEq, Eq, Hash)] pub enum IfDisconnected {