rustun

A Rust library for implementing STUN server and client asynchronously.

Documentation

The STUN protocol is defined in RFC 5389.

Examples

An example that issues a BINDING request:

use fibers_transport::UdpTransporter;
use futures::Future;
use rustun::channel::Channel;
use rustun::client::Client;
use rustun::message::Request;
use rustun::server::{BindingHandler, UdpServer};
use rustun::transport::StunUdpTransporter;
use rustun::Error;
use stun_codec::{rfc5389, MessageDecoder, MessageEncoder};

let addr = "127.0.0.1:0".parse().unwrap();

// Starts UDP server
let server = fibers_global::execute(UdpServer::start(fibers_global::handle(), addr, BindingHandler))?;
let server_addr = server.local_addr();
fibers_global::spawn(server.map(|_| ()).map_err(|e| panic!("{}", e)));

// Sents BINDING request
let response = UdpTransporter::<MessageEncoder<_>, MessageDecoder<_>>::bind(addr)
    .map_err(Error::from)
    .map(StunUdpTransporter::new)
    .map(Channel::new)
    .and_then(move |channel| {
        let client = Client::new(&fibers_global::handle(), channel);
        let request = Request::<rfc5389::Attribute>::new(rfc5389::methods::BINDING);
        client.call(server_addr, request)
    });

// Waits BINDING response
let response = fibers_global::execute(response)?;
assert!(response.is_ok());

You can run example server and client which handle Binding method as follows:

// Starts the STUN server in a shell.
$ cargo run --example binding_srv

// Executes a STUN client in another shell.
$ cargo run --example binding_cli -- 127.0.0.1
Ok(SuccessResponse(Message {
    class: SuccessResponse,
    method: Method(1),
    transaction_id: TransactionId(0x344A403694972F5E53B69465),
    attributes: [Known { inner: XorMappedAddress(XorMappedAddress(V4(127.0.0.1:54754))),
                         padding: Some(Padding([])) }]
}))