Abtin Keshavarzian
c2de9f646a
This commit enhances the TREL module to manage mDNS/DNSSD service registration and peer discovery (browse and resolving for TREL services). This feature can be controlled through `OPENTHREAD_CONFIG_TREL_MANAGE_DNSSD_ENABLE` (and/or the CMake option `OT_TREL_MANAGE_DNSSD`). When enabled, TREL will utilize the `Dnssd` module, which provides mDNS-related APIs. This can be tied to OpenThread's native mDNS implementation or to `otPlatDnssd` (i.e., provided by the platform layer). This commit also adds support for the TREL platform in the `Nexus` test framework and uses this to add a detailed `test_trel` case. This test covers basic TREL peer discovery and operation, along with specific scenarios such as peer removal delay, delayed mDNS start, TREL service name conflict resolution, host address changes, and supporting multiple services on the same host (while unlikely in actual deployments, this can be useful for testing and simulation where a single machine may act as multiple Thread nodes, thus advertising multiple TREL services from the same hostname. This is explicitly supported by the implementation and covered in the tests).
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