some minor bug fixs (#41)

* fix joinset leak; 

* fix udp packet format

* fix trace log panic

* avoid waiting after listener accept

src/common/mod.rs

@@ -1,3 +1,11 @@
+use std::{
+    fmt::Debug,
+    future,
+    sync::{Arc, Mutex},
+};
+use tokio::task::JoinSet;
+use tracing::Instrument;
+
 pub mod config;
 pub mod constants;
 pub mod error;
@@ -30,3 +38,83 @@ pub type PeerId = u32;
 pub fn new_peer_id() -> PeerId {
     rand::random()
 }
+
+pub fn join_joinset_background<T: Debug + Send + Sync + 'static>(
+    js: Arc<Mutex<JoinSet<T>>>,
+    origin: String,
+) {
+    let js = Arc::downgrade(&js);
+    tokio::spawn(
+        async move {
+            loop {
+                tokio::time::sleep(std::time::Duration::from_secs(1)).await;
+                if js.weak_count() == 0 {
+                    tracing::info!("joinset task exit");
+                    break;
+                }
+
+                future::poll_fn(|cx| {
+                    tracing::info!("try join joinset tasks");
+                    let Some(js) = js.upgrade() else {
+                        return std::task::Poll::Ready(());
+                    };
+
+                    let mut js = js.lock().unwrap();
+                    while !js.is_empty() {
+                        let ret = js.poll_join_next(cx);
+                        if ret.is_pending() {
+                            return std::task::Poll::Pending;
+                        }
+                    }
+
+                    std::task::Poll::Ready(())
+                })
+                .await;
+            }
+        }
+        .instrument(tracing::info_span!(
+            "join_joinset_background",
+            origin = origin
+        )),
+    );
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[tokio::test]
+    async fn test_join_joinset_backgroud() {
+        let js = Arc::new(Mutex::new(JoinSet::<()>::new()));
+        join_joinset_background(js.clone(), "TEST".to_owned());
+        js.try_lock().unwrap().spawn(async {
+            tokio::time::sleep(std::time::Duration::from_secs(1)).await;
+        });
+        tokio::time::sleep(std::time::Duration::from_secs(2)).await;
+        assert!(js.try_lock().unwrap().is_empty());
+
+        for _ in 0..5 {
+            js.try_lock().unwrap().spawn(async {
+                tokio::time::sleep(std::time::Duration::from_secs(3)).await;
+            });
+            tokio::task::yield_now().await;
+        }
+
+        tokio::time::sleep(std::time::Duration::from_secs(2)).await;
+
+        for _ in 0..5 {
+            js.try_lock().unwrap().spawn(async {
+                tokio::time::sleep(std::time::Duration::from_secs(1)).await;
+            });
+            tokio::task::yield_now().await;
+        }
+
+        tokio::time::sleep(std::time::Duration::from_secs(2)).await;
+        assert!(js.try_lock().unwrap().is_empty());
+
+        let weak_js = Arc::downgrade(&js);
+        drop(js);
+        tokio::time::sleep(std::time::Duration::from_secs(2)).await;
+        assert_eq!(weak_js.weak_count(), 0);
+    }
+}

src/connector/udp_hole_punch.rs

@@ -8,8 +8,8 @@ use tracing::Instrument;
 
 use crate::{
     common::{
-        constants, error::Error, global_ctx::ArcGlobalCtx, rkyv_util::encode_to_bytes,
-        stun::StunInfoCollectorTrait, PeerId,
+        constants, error::Error, global_ctx::ArcGlobalCtx, join_joinset_background,
+        rkyv_util::encode_to_bytes, stun::StunInfoCollectorTrait, PeerId,
     },
     peers::peer_manager::PeerManager,
     rpc::NatType,
@@ -75,9 +75,15 @@ impl UdpHolePunchListener {
             while let Ok(conn) = listener.accept().await {
                 last_connected_time_clone.store(std::time::Instant::now());
                 tracing::warn!(?conn, "udp hole punching listener got peer connection");
-                if let Err(e) = peer_mgr.add_tunnel_as_server(conn).await {
-                    tracing::error!(?e, "failed to add tunnel as server in hole punch listener");
-                }
+                let peer_mgr = peer_mgr.clone();
+                tokio::spawn(async move {
+                    if let Err(e) = peer_mgr.add_tunnel_as_server(conn).await {
+                        tracing::error!(
+                            ?e,
+                            "failed to add tunnel as server in hole punch listener"
+                        );
+                    }
+                });
             }
 
             running_clone.store(false);
@@ -115,7 +121,7 @@ struct UdpHolePunchConnectorData {
 struct UdpHolePunchRpcServer {
     data: Arc<UdpHolePunchConnectorData>,
 
-    tasks: Arc<Mutex<JoinSet<()>>>,
+    tasks: Arc<std::sync::Mutex<JoinSet<()>>>,
 }
 
 #[tarpc::server]
@@ -140,7 +146,7 @@ impl UdpHolePunchService for UdpHolePunchRpcServer {
             || my_udp_nat_type == NatType::Restricted as i32
         {
             // send punch msg to local_mapped_addr for 3 seconds, 3.3 packet per second
-            self.tasks.lock().await.spawn(async move {
+            self.tasks.lock().unwrap().spawn(async move {
                 for _ in 0..10 {
                     tracing::info!(?local_mapped_addr, "sending hole punching packet");
                     // generate a 128 bytes vec with random data
@@ -164,10 +170,9 @@ impl UdpHolePunchService for UdpHolePunchRpcServer {
 
 impl UdpHolePunchRpcServer {
     pub fn new(data: Arc<UdpHolePunchConnectorData>) -> Self {
-        Self {
-            data,
-            tasks: Arc::new(Mutex::new(JoinSet::new())),
-        }
+        let tasks = Arc::new(std::sync::Mutex::new(JoinSet::new()));
+        join_joinset_background(tasks.clone(), "UdpHolePunchRpcServer".to_owned());
+        Self { data, tasks }
     }
 
     async fn select_listener(&self) -> Option<(Arc<UdpSocket>, SocketAddr)> {

src/gateway/tcp_proxy.rs

@@ -16,6 +16,7 @@ use tracing::Instrument;
 
 use crate::common::error::Result;
 use crate::common::global_ctx::GlobalCtx;
+use crate::common::join_joinset_background;
 use crate::common::netns::NetNS;
 use crate::peers::packet::{self, ArchivedPacket};
 use crate::peers::peer_manager::PeerManager;
@@ -71,7 +72,7 @@ pub struct TcpProxy {
     peer_manager: Arc<PeerManager>,
     local_port: AtomicU16,
 
-    tasks: Arc<Mutex<JoinSet<()>>>,
+    tasks: Arc<std::sync::Mutex<JoinSet<()>>>,
 
     syn_map: SynSockMap,
     conn_map: ConnSockMap,
@@ -215,7 +216,7 @@ impl TcpProxy {
             peer_manager,
 
             local_port: AtomicU16::new(0),
-            tasks: Arc::new(Mutex::new(JoinSet::new())),
+            tasks: Arc::new(std::sync::Mutex::new(JoinSet::new())),
 
             syn_map: Arc::new(DashMap::new()),
             conn_map: Arc::new(DashMap::new()),
@@ -247,6 +248,7 @@ impl TcpProxy {
         self.peer_manager
             .add_nic_packet_process_pipeline(Box::new(self.clone()))
             .await;
+        join_joinset_background(self.tasks.clone(), "TcpProxy".to_owned());
 
         Ok(())
     }
@@ -268,7 +270,7 @@ impl TcpProxy {
                 tokio::time::sleep(Duration::from_secs(10)).await;
             }
         };
-        tasks.lock().await.spawn(syn_map_cleaner_task);
+        tasks.lock().unwrap().spawn(syn_map_cleaner_task);
 
         Ok(())
     }
@@ -312,7 +314,7 @@ impl TcpProxy {
                 let old_nat_val = conn_map.insert(entry_clone.id, entry_clone.clone());
                 assert!(old_nat_val.is_none());
 
-                tasks.lock().await.spawn(Self::connect_to_nat_dst(
+                tasks.lock().unwrap().spawn(Self::connect_to_nat_dst(
                     net_ns.clone(),
                     tcp_stream,
                     conn_map.clone(),
@@ -325,7 +327,7 @@ impl TcpProxy {
         };
         self.tasks
             .lock()
-            .await
+            .unwrap()
             .spawn(accept_task.instrument(tracing::info_span!("tcp_proxy_listener")));
 
         Ok(())

src/instance/listeners.rs

@@ -100,15 +100,19 @@ impl<H: TunnelHandlerForListener + Send + Sync + 'static + Debug> ListenerManage
                 tunnel_info.remote_addr.clone(),
             ));
             tracing::info!(ret = ?ret, "conn accepted");
-            let server_ret = peer_manager.handle_tunnel(ret).await;
-            if let Err(e) = &server_ret {
-                global_ctx.issue_event(GlobalCtxEvent::ConnectionError(
-                    tunnel_info.local_addr,
-                    tunnel_info.remote_addr,
-                    e.to_string(),
-                ));
-                tracing::error!(error = ?e, "handle conn error");
-            }
+            let peer_manager = peer_manager.clone();
+            let global_ctx = global_ctx.clone();
+            tokio::spawn(async move {
+                let server_ret = peer_manager.handle_tunnel(ret).await;
+                if let Err(e) = &server_ret {
+                    global_ctx.issue_event(GlobalCtxEvent::ConnectionError(
+                        tunnel_info.local_addr,
+                        tunnel_info.remote_addr,
+                        e.to_string(),
+                    ));
+                    tracing::error!(error = ?e, "handle conn error");
+                }
+            });
         }
     }
 

src/peers/packet.rs

@@ -99,7 +99,7 @@ pub enum PacketType {
     TaRpc = 6,
 }
 
-#[derive(Archive, Deserialize, Serialize, Debug)]
+#[derive(Archive, Deserialize, Serialize)]
 #[archive(compare(PartialEq), check_bytes)]
 // Derives can be passed through to the generated type:
 pub struct Packet {
@@ -109,6 +109,19 @@ pub struct Packet {
     pub payload: String,
 }
 
+impl std::fmt::Debug for Packet {
+    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+        write!(
+            f,
+            "Packet {{ from_peer: {}, to_peer: {}, packet_type: {:?}, payload: {:?} }}",
+            self.from_peer,
+            self.to_peer,
+            self.packet_type,
+            &self.payload.as_bytes()
+        )
+    }
+}
+
 impl std::fmt::Debug for ArchivedPacket {
     fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
         write!(

src/tunnels/udp_tunnel.rs

@@ -13,7 +13,10 @@ use tokio_util::{
 use tracing::Instrument;
 
 use crate::{
-    common::rkyv_util::{self, encode_to_bytes, vec_to_string},
+    common::{
+        join_joinset_background,
+        rkyv_util::{self, encode_to_bytes, vec_to_string},
+    },
     rpc::TunnelInfo,
     tunnels::{build_url_from_socket_addr, close_tunnel, TunnelConnCounter, TunnelConnector},
 };
@@ -27,7 +30,7 @@ use super::{
 
 pub const UDP_DATA_MTU: usize = 2500;
 
-#[derive(Archive, Deserialize, Serialize, Debug)]
+#[derive(Archive, Deserialize, Serialize)]
 #[archive(compare(PartialEq), check_bytes)]
 // Derives can be passed through to the generated type:
 pub enum UdpPacketPayload {
@@ -37,14 +40,29 @@ pub enum UdpPacketPayload {
     Data(String),
 }
 
+impl std::fmt::Debug for UdpPacketPayload {
+    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+        let mut tmp = f.debug_struct("ArchivedUdpPacketPayload");
+        match self {
+            UdpPacketPayload::Syn => tmp.field("Syn", &"").finish(),
+            UdpPacketPayload::Sack => tmp.field("Sack", &"").finish(),
+            UdpPacketPayload::HolePunch(s) => tmp.field("HolePunch", &s.as_bytes()).finish(),
+            UdpPacketPayload::Data(s) => tmp.field("Data", &s.as_bytes()).finish(),
+        }
+    }
+}
+
 #[derive(Archive, Deserialize, Serialize, Debug)]
 #[archive(compare(PartialEq), check_bytes)]
 #[archive_attr(derive(Debug))]
 pub struct UdpPacket {
     pub conn_id: u32,
+    pub magic: u32,
     pub payload: UdpPacketPayload,
 }
 
+const UDP_PACKET_MAGIC: u32 = 0x19941126;
+
 impl std::fmt::Debug for ArchivedUdpPacketPayload {
     fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
         let mut tmp = f.debug_struct("ArchivedUdpPacketPayload");
@@ -63,6 +81,7 @@ impl UdpPacket {
     pub fn new_data_packet(conn_id: u32, data: Vec<u8>) -> Self {
         Self {
             conn_id,
+            magic: UDP_PACKET_MAGIC,
             payload: UdpPacketPayload::Data(vec_to_string(data)),
         }
     }
@@ -70,6 +89,7 @@ impl UdpPacket {
     pub fn new_hole_punch_packet(data: Vec<u8>) -> Self {
         Self {
             conn_id: 0,
+            magic: UDP_PACKET_MAGIC,
             payload: UdpPacketPayload::HolePunch(vec_to_string(data)),
         }
     }
@@ -77,6 +97,7 @@ impl UdpPacket {
     pub fn new_syn_packet(conn_id: u32) -> Self {
         Self {
             conn_id,
+            magic: UDP_PACKET_MAGIC,
             payload: UdpPacketPayload::Syn,
         }
     }
@@ -84,6 +105,7 @@ impl UdpPacket {
     pub fn new_sack_packet(conn_id: u32) -> Self {
         Self {
             conn_id,
+            magic: UDP_PACKET_MAGIC,
             payload: UdpPacketPayload::Sack,
         }
     }
@@ -100,6 +122,11 @@ fn try_get_data_payload(mut buf: BytesMut, conn_id: u32) -> Option<BytesMut> {
         return None;
     }
 
+    if udp_packet.magic != UDP_PACKET_MAGIC {
+        tracing::warn!(?udp_packet, "udp magic not match");
+        return None;
+    }
+
     let ArchivedUdpPacketPayload::Data(payload) = &udp_packet.payload else {
         tracing::warn!(?udp_packet, "udp payload not data");
         return None;
@@ -189,7 +216,7 @@ pub struct UdpTunnelListener {
     socket: Option<Arc<UdpSocket>>,
 
     sock_map: Arc<DashMap<SocketAddr, ArcStreamSinkPair>>,
-    forward_tasks: Arc<Mutex<JoinSet<()>>>,
+    forward_tasks: Arc<std::sync::Mutex<JoinSet<()>>>,
 
     conn_recv: tokio::sync::mpsc::Receiver<Box<dyn Tunnel>>,
     conn_send: Option<tokio::sync::mpsc::Sender<Box<dyn Tunnel>>>,
@@ -202,7 +229,7 @@ impl UdpTunnelListener {
             addr,
             socket: None,
             sock_map: Arc::new(DashMap::new()),
-            forward_tasks: Arc::new(Mutex::new(JoinSet::new())),
+            forward_tasks: Arc::new(std::sync::Mutex::new(JoinSet::new())),
             conn_recv,
             conn_send: Some(conn_send),
         }
@@ -234,7 +261,7 @@ impl UdpTunnelListener {
     async fn handle_connect(
         socket: Arc<UdpSocket>,
         addr: SocketAddr,
-        forward_tasks: Arc<Mutex<JoinSet<()>>>,
+        forward_tasks: Arc<std::sync::Mutex<JoinSet<()>>>,
         sock_map: Arc<DashMap<SocketAddr, ArcStreamSinkPair>>,
         local_url: url::Url,
         conn_id: u32,
@@ -251,7 +278,7 @@ impl UdpTunnelListener {
         let addr_copy = addr.clone();
         sock_map.insert(addr, Arc::new(Mutex::new(ss_pair)));
         let ctunnel_stream = ctunnel.pin_stream();
-        forward_tasks.lock().await.spawn(async move {
+        forward_tasks.lock().unwrap().spawn(async move {
             let ret = ctunnel_stream
                 .map(|v| {
                     tracing::trace!(?v, "udp stream recv something in forward task");
@@ -304,7 +331,7 @@ impl TunnelListener for UdpTunnelListener {
         let sock_map = self.sock_map.clone();
         let conn_send = self.conn_send.take().unwrap();
         let local_url = self.local_url().clone();
-        self.forward_tasks.lock().await.spawn(
+        self.forward_tasks.lock().unwrap().spawn(
             async move {
                 loop {
                     let mut buf = BytesMut::new();
@@ -323,6 +350,11 @@ impl TunnelListener for UdpTunnelListener {
                         continue;
                     };
 
+                    if udp_packet.magic != UDP_PACKET_MAGIC {
+                        tracing::info!(?udp_packet, "udp magic not match");
+                        continue;
+                    }
+
                     if matches!(udp_packet.payload, ArchivedUdpPacketPayload::Syn) {
                         let Ok(conn) = Self::handle_connect(
                             socket.clone(),
@@ -350,22 +382,7 @@ impl TunnelListener for UdpTunnelListener {
             .instrument(tracing::info_span!("udp forward task", ?self.socket)),
         );
 
-        // let forward_tasks_clone = self.forward_tasks.clone();
-        // tokio::spawn(async move {
-        //     loop {
-        //         let mut locked_forward_tasks = forward_tasks_clone.lock().await;
-        //         tokio::select! {
-        //             ret = locked_forward_tasks.join_next() => {
-        //                 tracing::warn!(?ret, "udp forward task exit");
-        //             }
-        //             else => {
-        //                 drop(locked_forward_tasks);
-        //                 tokio::time::sleep(tokio::time::Duration::from_secs(1)).await;
-        //                 continue;
-        //             }
-        //         }
-        //     }
-        // });
+        join_joinset_background(self.forward_tasks.clone(), "UdpTunnelListener".to_owned());
 
         Ok(())
     }
@@ -453,6 +470,14 @@ impl UdpTunnelConnector {
             )));
         };
 
+        if udp_packet.magic != UDP_PACKET_MAGIC {
+            tracing::info!(?udp_packet, "udp magic not match");
+            return Err(super::TunnelError::ConnectError(format!(
+                "udp connect error, magic not match. magic: {:?}",
+                udp_packet.magic
+            )));
+        }
+
         if conn_id != udp_packet.conn_id {
             return Err(super::TunnelError::ConnectError(format!(
                 "udp connect error, conn id not match. conn_id: {:?}, {:?}",