first commit

src/main.rs

@@ -0,0 +1,104 @@
+use hbb_common::{
+    protobuf::Message as _,
+    rendezvous_proto::*,
+    tcp::{new_listener, FramedStream},
+    tokio,
+    udp::FramedSocket,
+};
+
+#[tokio::main(basic_scheduler)]
+async fn main() {
+    let mut socket = FramedSocket::new("0.0.0.0:21116").await.unwrap();
+    let mut listener = new_listener("0.0.0.0:21116", false).await.unwrap();
+    let mut rlistener = new_listener("0.0.0.0:21117", false).await.unwrap();
+    let mut id_map = std::collections::HashMap::new();
+    let relay_server = std::env::var("IP").unwrap();
+    let mut saved_stream = None;
+    loop {
+        tokio::select! {
+            Some(Ok((bytes, addr))) = socket.next() => {
+                if let Ok(msg_in) = RendezvousMessage::parse_from_bytes(&bytes) {
+                    match msg_in.union {
+                        Some(rendezvous_message::Union::register_peer(rp)) => {
+                            id_map.insert(rp.id, addr);
+                        }
+                        Some(rendezvous_message::Union::register_pk(_)) => {
+                            let mut msg_out = RendezvousMessage::new();
+                            msg_out.set_register_pk_response(RegisterPkResponse {
+                                result: register_pk_response::Result::OK.into(),
+                                ..Default::default()
+                            });
+                            socket.send(&msg_out, addr).await.ok();
+                        }
+                        _ => {}
+                    }
+                }
+            }
+            Ok((stream, _)) = listener.accept() => {
+                let mut stream = FramedStream::from(stream);
+                if let Some(Ok(bytes)) = stream.next_timeout(3000).await {
+                    if let Ok(msg_in) = RendezvousMessage::parse_from_bytes(&bytes) {
+                        match msg_in.union {
+                            Some(rendezvous_message::Union::punch_hole_request(ph)) => {
+                                if let Some(addr) = id_map.get(&ph.id) {
+                                    let mut msg_out = RendezvousMessage::new();
+                                    msg_out.set_request_relay(RequestRelay {
+                                        relay_server: relay_server.clone(),
+                                        ..Default::default()
+                                    });
+                                    socket.send(&msg_out, addr.clone()).await.ok();
+                                    saved_stream = Some(stream);
+                                }
+                            }
+                            Some(rendezvous_message::Union::relay_response(_)) => {
+                                let mut msg_out = RendezvousMessage::new();
+                                msg_out.set_relay_response(RelayResponse {
+                                    relay_server: relay_server.clone(),
+                                    ..Default::default()
+                                });
+                                if let Some(mut stream) = saved_stream.take() {
+                                    stream.send(&msg_out).await.ok();
+                                    if let Ok((stream_a, _)) = rlistener.accept().await {
+                                        let mut stream_a = FramedStream::from(stream_a);
+                                        stream_a.next_timeout(3_000).await;
+                                        if let Ok((stream_b, _)) = rlistener.accept().await {
+                                            let mut stream_b = FramedStream::from(stream_b);
+                                            stream_b.next_timeout(3_000).await;
+                                            relay(stream_a, stream_b).await;
+                                        }
+                                    }
+                                }
+                            }
+                            _ => {}
+                        }
+                    }
+                }
+            }
+        }
+    }
+}
+
+async fn relay(stream: FramedStream, peer: FramedStream) {
+    let mut peer = peer;
+    let mut stream = stream;
+    peer.set_raw();
+    stream.set_raw();
+    loop {
+        tokio::select! {
+            res = peer.next() => {
+                if let Some(Ok(bytes)) = res {
+                    stream.send_bytes(bytes.into()).await.ok();
+                } else {
+                    break;
+                }
+            },
+            res = stream.next() => {
+                if let Some(Ok(bytes)) = res {
+                    peer.send_bytes(bytes.into()).await.ok();
+                } else {
+                    break;
+                }
+            },
+        }
+    }
+}