| commit | bf41332061b49b2a09f6755a129229e4769e1cd1 | [log] [tgz] |
|---|---|---|
| author | Abtin Keshavarzian <abtink@google.com> | Tue Apr 09 08:32:01 2024 -0700 |
| committer | GitHub <noreply@github.com> | Tue Apr 09 08:32:01 2024 -0700 |
| tree | 7536ab07ebf8c8f562ee2217aecf6b6a6b4c886d | |
| parent | 6de5cd8256d62b14bcc18b7f081d71411f8b942f [diff] |
[mdns] add native mDNS support in OT (#9797) This commit introduces native mDNS support within the OpenThread stack, implementing RFC 6762 compliant registration of hosts, services, and keys. It supports the following functionalities: - Sending probes to claim names. - Sending announcements on initial registration and changes. - Sending "goodbye" announcements when unregistered or upon record removal. - Negative responses (NSEC). - Support for service sub-types and their addition/removal. - Support for `_services._dns-sd._udp` queries (all service types). - Responding to queries (including "QU" questions). - Delay mechanism when responding to multi-question query messages, ensuring unique answers. - Providing extra records in the Additional Data section if not already in the Answer section (e.g., on a PTR query, include SRV and host AAAA addresses). - Implementing Known-Answer Suppression. - Supporting multi-packet queries with known answers in follow-up messages. - Rate-limiting record multicasts (once per second). - Rate-limiting probe responses (once per 250ms). - Detecting conflicts after probes. - Limiting the size of emitted responses or probes, breaking into multiple messages if necessary. - Detecting self originating messages (sent by mDNS module). - Support for service browser. - Support for service resolvers (SRV and TXT records) and IPv4/IPv6 address resolvers for hostnames. - Introduces smart cache management: - Passively caches service records for active browsers. - Passively caches address records for active service resolvers. - Enables multiple simultaneous browsers/resolvers for the same service/host. This commit introduces public `otMdns` OpenThread APIs and related CLI commands for the mDNS module. For platform abstraction, `otPlatMdns` APIs are defined in `mdns_socket.h` (e.g., to send or receive mDNS messages): - An implementation of the platform APIs is provided for posix. - Also under the simulation platform, a simplified implementation of the `otPlatMdns` APIs is provided (intended for testing). This commit also adds a detailed `test_mdns` unit test, validating various functionalities and covering potential edge cases.
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 1.3.0 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.
All end-user documentation and guides are located at openthread.io. If you're looking to do things like...
...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.
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.
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.
OpenThread support is available on GitHub: