mdns

Documentation

An multicast DNS client in Rust.

Wikipedia

Example

Find IP addresses for all Chromecasts on the local network.

```rust use futuresutil::{pinmut, stream::StreamExt}; use mdns::{Error, Record, RecordKind}; use std::{net::IpAddr, time::Duration};

const SERVICENAME: &'static str = "googlecast._tcp.local";

[tokio::main]

async fn main() -> Result<(), Error> { // Iterate through responses from each Cast device, asking for new devices every 15s let stream = mdns::discover::all(SERVICENAME, Duration::fromsecs(15))?.listen(); pin_mut!(stream);

while let Some(Ok(response)) = stream.next().await {
    let addr = response.records()
                       .filter_map(self::to_ip_addr)
                       .next();

    if let Some(addr) = addr {
        println!("found cast device at {}", addr);
    } else {
        println!("cast device does not advertise address");
    }
}

Ok(())

}

fn toipaddr(record: &Record) -> Option { match record.kind { RecordKind::A(addr) => Some(addr.into()), RecordKind::AAAA(addr) => Some(addr.into()), _ => None, } } ```