To use webrtc, you must implement the PeerConnectionEventHandler trait to handle events like ICE candidate gathering. You then use RTCConfigurationBuilder to configure ICE servers and PeerConnectionBuilder to instantiate the connection. Once built, you can use the PeerConnection to create and set SDP offers.
use webrtc::peer_connection::{
PeerConnection, PeerConnectionBuilder, PeerConnectionEventHandler,
RTCConfigurationBuilder, RTCIceServer, RTCPeerConnectionIceEvent,
};
use std::sync::Arc;
// 1. Implement the PeerConnectionEventHandler trait to handle events
#[derive(Clone)]
struct MyHandler;
#[async_trait::async_trait]
impl PeerConnectionEventHandler for MyHandler {
async fn on_ice_candidate(&self, event: RTCPeerConnectionIceEvent) {
println!("New local ICE candidate gathered: {}", event.candidate);
}
}
# #[cfg(feature = "runtime-tokio")]
#[tokio::main]
async fn main() -> Result<(), Box<dyn std::error::Error>> {
// 2. Configure the peer connection
let config = RTCConfigurationBuilder::default()
.with_ice_servers(vec![RTCIceServer {
urls: vec!["stun:stun.l.google.com:19302".to_owned()],
..Default::default()
}])
.build();
// 3. Build the PeerConnection
let pc = PeerConnectionBuilder::new()
.with_configuration(config)
.with_handler(Arc::new(MyHandler))
.with_udp_addrs(vec!["0.0.0.0:0"])
.build()
.await?;
// 4. Create an SDP offer and set it as local description
let offer = pc.create_offer(None).await?;
pc.set_local_description(offer).await?;
println!("Local description set successfully!");
Ok(())
}
# #[cfg(not(feature = "runtime-tokio"))]
# fn main() {}
