⚠️ ARCHIVED — Source moved.

This repository is no longer the source of truth for mctp-rs. The active source now lives in the OpenDevicePartnership/embedded-services workspace as a path-pinned member at mctp-rs/.

The in-tree copy was bootstrapped from this repo's main @ 3d941ba in embedded-services#823 and brought to parity with main @ 1b8b7f5 (the head of this repo at the time of archival) in embedded-services#844.

Open issues and PRs against the new location: https://github.com/OpenDevicePartnership/embedded-services/issues.

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mctp-rs

A no_std Rust implementation of the Management Component Transport Protocol (MCTP) as defined in the DMTF DSP0236 specification.

Overview

MCTP is a communication protocol designed for platform management subsystems in computer systems. It facilitates communication between management controllers (like BMCs) and managed devices across various bus types. This library provides:

• Protocol Implementation: Complete MCTP transport layer with packet assembly/disassembly
• Medium Abstraction: Support for different physical transport layers (SMBus/eSPI included)
• No-std Compatible: Suitable for embedded and resource-constrained environments

Features

• espi - Enables eSPI device support via the espi-device crate

Documentation & Usage

See the crate documentation for up-to-date usage and examples: Rendered Docs

Architecture

The library is structured around:

• MctpPacketContext: Main entry point for handling MCTP packets
• MctpMedium: Trait for implementing transport-specific packet handling
• MctpMessage: Represents a complete MCTP message with reply context
• Control Commands: Type-safe implementation of MCTP control protocol

License

MIT License - see LICENSE.md for details.

Contributing

1. Ensure cargo check and cargo test pass
2. Test with all feature combinations using cargo hack --feature-powerset check
3. Maintain no_std compatibility
4. Follow the existing code patterns for protocol message handling