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