This is a small implementation of mDNS (Multicast DNS) based service discovery in safe Rust, with a small set of dependencies. Some highlights:

• supports both the client (querier) and the server (responder) uses.
• works with both sync and async code.
• no dependency on any async runtimes.

We are not using async/.await internally, instead we create a new thread to run a mDNS daemon.

The API interacts with the daemon via flume channels that work easily with both sync and async code. For more details, please see the documentation.

This implementation is based on the following RFCs:

• mDNS: RFC 6762
• DNS-SD: RFC 6763
• DNS: RFC 1035

This is still beta software. We focus on the common use cases at hand. And we tested with some existing common tools (e.g. Avahi on Linux, dns-sd on MacOS, and Bonjour library on iOS) to verify the basic compatibility.

Currently this library has the following limitations:

• Only support IPv4, not IPv6.
• Only support multicast, no unicast send/recv.
• Only tested on Linux and MacOS, not on Windows or other OSes.

Tested against Rust 1.49.0

Licensed under either of

• Apache License, Version 2.0 (LICENSE-APACHE or http://www.apache.org/licenses/LICENSE-2.0)
• MIT license (LICENSE-MIT or http://opensource.org/licenses/MIT)

at your option.

Contributions are welcome! Please open an issue in GitHub if any questions.

Unless you explicitly state otherwise, any contribution intentionally submitted for inclusion in the work by you, as defined in the above license(s), shall be dual licensed as above, without any additional terms or conditions.