Abtin Keshavarzian
7009584dad
This commit introduces the Thread Direct (TD) key management module (`ThreadDirect::KeyManager`, `Key`, and `KeyId`) along with its public C APIs in `<openthread/thread_direct.h>`. - Add `KeyManager` and `otThreadDirect*Key*` APIs to register, find, iterate over, and unregister Thread Direct keys, supporting both literal keys and `otCryptoKeyRef` key references. - Track the MAC security frame counter per `Key` and persist an ahead frame counter in `Settings`. When a key's frame counter is incremented and reaches the saved counter, `KeyManager` posts a tasklet to re-save the key with a newly advanced counter (adding the updated entry before removing stale entries from `Settings` to ensure crash safety across resets). - Restore saved keys on instance initialization and clear them on factory reset or persistent info erase. - Add Thread Direct compile-time configs in `config/thread_direct.h` for configuring pool vs. heap key allocation, max registered keys, and persistent frame counter ahead value. - Add `test_thread_direct_key_manager` Nexus test covering key registration, lookup, iteration, capacity limits, frame counter advancement and persistence across resets, and unregistration.
What is OpenThread?
OpenThread released by Google is... 
...an open-source implementation of the Thread networking protocol. Google Nest has released OpenThread to make the technology used in Nest products more broadly available to developers to accelerate the development of products for the connected home.
...OS and platform agnostic, with a narrow platform abstraction layer and a small memory footprint, making it highly portable. It supports both system-on-chip (SoC) and network co-processor (NCP) designs.
...a Thread Certified Component, implementing all features defined in the Thread 1.4.0 specification, including all Thread networking layers (IPv6, 6LoWPAN, IEEE 802.15.4 with MAC security, Mesh Link Establishment, Mesh Routing) and device roles, as well as Border Router support.
More information about Thread can be found at threadgroup.org. Thread is a registered trademark of the Thread Group, Inc.
Who supports OpenThread?
Getting started
All end-user documentation and guides are located at openthread.io. If you're looking to do things like...
- Learn more about OpenThread features and enhancements
- Use OpenThread in your products
- Learn how to build and configure a Thread network
- Port OpenThread to a new platform
- Build an application on top of OpenThread
- Certify a product using OpenThread
...then openthread.io is the place for you.
Note: For users in China, end-user documentation is available at openthread.google.cn.
If you're interested in contributing to OpenThread, read on.
Contributing
We would love for you to contribute to OpenThread and help make it even better than it is today! See our Contributing Guidelines for more information.
Contributors are required to abide by our Code of Conduct and Coding Conventions and Style Guide.
License
OpenThread is released under the BSD 3-Clause license. See the LICENSE file for more information.
Please only use the OpenThread name and marks when accurately referencing this software distribution. Do not use the marks in a way that suggests you are endorsed by or otherwise affiliated with Nest, Google, or The Thread Group.
Need help?
OpenThread support is available on GitHub:
- Bugs and feature requests — submit to the Issue Tracker
- Community Discussion - ask questions, share ideas, and engage with other community members