hbbf

src/hbbf/main.rs

@@ -0,0 +1,83 @@
+use hbb_common::{
+    env_logger, log,
+    protobuf::Message as _,
+    rendezvous_proto::*,
+    sleep,
+    tcp::{new_listener, FramedStream},
+    tokio, ResultType,
+};
+use std::{
+    collections::HashMap,
+    net::SocketAddr,
+    sync::{Arc, Mutex},
+};
+
+lazy_static::lazy_static! {
+    static ref PEERS: Arc<Mutex<HashMap<String, FramedStream>>> = Arc::new(Mutex::new(HashMap::new()));
+}
+
+#[tokio::main]
+async fn main() -> ResultType<()> {
+    env_logger::init();
+    let addr = "0.0.0.0:21117";
+    log::info!("Listening on {}", addr);
+    let mut listener = new_listener(addr, true).await?;
+    loop {
+        tokio::select! {
+            Ok((stream, addr)) = listener.accept() => {
+                tokio::spawn(async move {
+                    make_pair(FramedStream::from(stream), addr).await.ok();
+                });
+            }
+        }
+    }
+}
+
+async fn make_pair(stream: FramedStream, addr: SocketAddr) -> ResultType<()> {
+    let mut stream = stream;
+    if let Some(Ok(bytes)) = stream.next_timeout(30_000).await {
+        if let Ok(msg_in) = RendezvousMessage::parse_from_bytes(&bytes) {
+            if let Some(rendezvous_message::Union::request_forward(rf)) = msg_in.union {
+                if !rf.uuid.is_empty() {
+                    let peer = PEERS.lock().unwrap().remove(&rf.uuid);
+                    if let Some(peer) = peer {
+                        log::info!("Forward request {} from {} got paired", rf.uuid, addr);
+                        return forward(stream, peer).await;
+                    } else {
+                        log::info!("New forward request {} from {}", rf.uuid, addr);
+                        PEERS.lock().unwrap().insert(rf.uuid.clone(), stream);
+                        sleep(30.).await;
+                        PEERS.lock().unwrap().remove(&rf.uuid);
+                    }
+                }
+            }
+        }
+    }
+    Ok(())
+}
+
+async fn forward(stream: FramedStream, peer: FramedStream) -> ResultType<()> {
+    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?;
+                } else {
+                    break;
+                }
+            },
+            res = stream.next() => {
+                if let Some(Ok(bytes)) = res {
+                    peer.send_bytes(bytes.into()).await?;
+                } else {
+                    break;
+                }
+            },
+        }
+    }
+    Ok(())
+}

src/main.rs

@@ -8,7 +8,7 @@ use hbbs::*;
 async fn main() -> ResultType<()> {
     env_logger::init();
     let addr = "0.0.0.0:21116";
-    log::info!("Start Server {}", addr);
+    log::info!("Listening on {}", addr);
     RendezvousServer::start(&addr).await?;
     Ok(())
 }