Why is DTLS peer_certificates empty at server side? about webrtc

[simon-fu]

Add some code to DTLSListener::accept() :

impl Listener for DTLSListener {
    async fn accept(&self) -> UtilResult<(Arc<dyn Conn + Send + Sync>, SocketAddr)> {
        ...

        // added by simon
        let state = dtls_conn.connection_state().await;
        println!("accept, peer_certificates {}", state.peer_certificates.len());

        Ok((Arc::new(dtls_conn), raddr))
    }
  ...
}

Run the self sign examples:

$ cargo run --example listen_selfsign -- --host 127.0.0.1:4444
$ cargo run --example dial_selfsign -- --server 127.0.0.1:4444

At server side, it prints :

accept, peer_certificates 0

[simon-fu]

Fixed by set Config.client_auth to ClientAuthType::RequireAnyClientCert.