export unterlying errors via network crate, to generate more detailed logs

Cargo.lock

@@ -6690,7 +6690,7 @@ dependencies = [
 
 [[package]]
 name = "veloren-network-protocol"
-version = "0.6.0"
+version = "0.6.1"
 dependencies = [
  "async-channel",
  "async-trait",

network/protocol/Cargo.toml

@@ -1,7 +1,7 @@
 [package]
 name = "veloren-network-protocol"
 description = "pure Protocol without any I/O itself"
-version = "0.6.0"
+version = "0.6.1"
 authors = ["Marcel Märtens <marcel.cochem@googlemail.com>"]
 edition = "2021"
 
@@ -24,7 +24,7 @@ rand = { version = "0.8" }
 # async traits
 async-trait = "0.1.42"
 bytes = "^1"
-hashbrown = { version = ">=0.9, <0.13" }
+hashbrown = { version = ">=0.12, <0.13" }
 
 [dev-dependencies]
 async-channel = "1.5.1"

network/protocol/benches/protocols.rs

@@ -271,73 +271,88 @@ mod utils {
 
     #[async_trait]
     impl UnreliableDrain for ACDrain {
+        type CustomErr = ();
         type DataFormat = MpscMsg;
 
-        async fn send(&mut self, data: Self::DataFormat) -> Result<(), ProtocolError> {
+        async fn send(
+            &mut self,
+            data: Self::DataFormat,
+        ) -> Result<(), ProtocolError<Self::CustomErr>> {
             self.sender
                 .send(data)
                 .await
-                .map_err(|_| ProtocolError::Closed)
+                .map_err(|_| ProtocolError::Custom(()))
         }
     }
 
     #[async_trait]
     impl UnreliableSink for ACSink {
+        type CustomErr = ();
         type DataFormat = MpscMsg;
 
-        async fn recv(&mut self) -> Result<Self::DataFormat, ProtocolError> {
+        async fn recv(&mut self) -> Result<Self::DataFormat, ProtocolError<Self::CustomErr>> {
             self.receiver
                 .recv()
                 .await
-                .map_err(|_| ProtocolError::Closed)
+                .map_err(|_| ProtocolError::Custom(()))
         }
     }
 
     #[async_trait]
     impl UnreliableDrain for TcpDrain {
+        type CustomErr = ();
         type DataFormat = BytesMut;
 
-        async fn send(&mut self, data: Self::DataFormat) -> Result<(), ProtocolError> {
+        async fn send(
+            &mut self,
+            data: Self::DataFormat,
+        ) -> Result<(), ProtocolError<Self::CustomErr>> {
             self.sender
                 .send(data)
                 .await
-                .map_err(|_| ProtocolError::Closed)
+                .map_err(|_| ProtocolError::Custom(()))
         }
     }
 
     #[async_trait]
     impl UnreliableSink for TcpSink {
+        type CustomErr = ();
         type DataFormat = BytesMut;
 
-        async fn recv(&mut self) -> Result<Self::DataFormat, ProtocolError> {
+        async fn recv(&mut self) -> Result<Self::DataFormat, ProtocolError<Self::CustomErr>> {
             self.receiver
                 .recv()
                 .await
-                .map_err(|_| ProtocolError::Closed)
+                .map_err(|_| ProtocolError::Custom(()))
         }
     }
 
     #[async_trait]
     impl UnreliableDrain for QuicDrain {
+        type CustomErr = ();
         type DataFormat = QuicDataFormat;
 
-        async fn send(&mut self, data: Self::DataFormat) -> Result<(), ProtocolError> {
+        async fn send(
+            &mut self,
+            data: Self::DataFormat,
+        ) -> Result<(), ProtocolError<Self::CustomErr>> {
             self.sender
                 .send(data)
                 .await
-                .map_err(|_| ProtocolError::Closed)
+                .map_err(|_| ProtocolError::Custom(()))
         }
     }
 
     #[async_trait]
     impl UnreliableSink for QuicSink {
+        type CustomErr = ();
         type DataFormat = QuicDataFormat;
 
-        async fn recv(&mut self) -> Result<Self::DataFormat, ProtocolError> {
+        async fn recv(&mut self) -> Result<Self::DataFormat, ProtocolError<Self::CustomErr>> {
             self.receiver
                 .recv()
                 .await
-                .map_err(|_| ProtocolError::Closed)
+                .map_err(|_| ProtocolError::Custom(()))
         }
     }
 }

network/protocol/src/error.rs

@@ -2,38 +2,50 @@
 ///
 /// [`InitProtocol`]: crate::InitProtocol
 #[derive(Debug, PartialEq)]
-pub enum InitProtocolError {
+pub enum InitProtocolError<E: std::fmt::Debug + Send> {
-    Closed,
+    Custom(E),
+    /// expected Handshake, didn't get handshake
+    NotHandshake,
+    /// expected Id, didn't get id
+    NotId,
     WrongMagicNumber([u8; 7]),
     WrongVersion([u32; 3]),
 }
 
 /// When you return closed you must stay closed!
 #[derive(Debug, PartialEq)]
-pub enum ProtocolError {
+pub enum ProtocolError<E: std::fmt::Debug + Send> {
-    /// Closed indicates the underlying I/O got closed
+    /// Custom Error on the underlying I/O,
     /// e.g. the TCP, UDP or MPSC connection is dropped by the OS
-    Closed,
+    Custom(E),
     /// Violated indicates the veloren_network_protocol was violated
     /// the underlying I/O connection is still valid, but the remote side
     /// send WRONG (e.g. Invalid, or wrong order) data on the protocol layer.
     Violated,
 }
 
-impl From<ProtocolError> for InitProtocolError {
+impl<E: std::fmt::Debug + Send> From<ProtocolError<E>> for InitProtocolError<E> {
-    fn from(err: ProtocolError) -> Self {
+    fn from(err: ProtocolError<E>) -> Self {
         match err {
-            ProtocolError::Closed => InitProtocolError::Closed,
+            ProtocolError::Custom(e) => InitProtocolError::Custom(e),
-            // not possible as the Init has raw access to the I/O
+            ProtocolError::Violated => {
-            ProtocolError::Violated => InitProtocolError::Closed,
+                unreachable!("not possible as the Init has raw access to the I/O")
+            },
         }
     }
 }
 
-impl core::fmt::Display for InitProtocolError {
+impl<E: std::fmt::Debug + Send> core::fmt::Display for InitProtocolError<E> {
     fn fmt(&self, f: &mut core::fmt::Formatter<'_>) -> core::fmt::Result {
         match self {
-            InitProtocolError::Closed => write!(f, "Channel closed"),
+            InitProtocolError::Custom(e) => write!(f, "custom: {:?}", e),
+            InitProtocolError::NotHandshake => write!(
+                f,
+                "Remote send something which couldn't be parsed as a handshake"
+            ),
+            InitProtocolError::NotId => {
+                write!(f, "Remote send something which couldn't be parsed as an id")
+            },
             InitProtocolError::WrongMagicNumber(r) => write!(
                 f,
                 "Magic Number doesn't match, remote side send '{:?}' instead of '{:?}'",
@@ -50,14 +62,14 @@ impl core::fmt::Display for InitProtocolError {
     }
 }
 
-impl core::fmt::Display for ProtocolError {
+impl<E: std::fmt::Debug + Send> core::fmt::Display for ProtocolError<E> {
     fn fmt(&self, f: &mut core::fmt::Formatter<'_>) -> core::fmt::Result {
         match self {
-            ProtocolError::Closed => write!(f, "Channel closed"),
+            ProtocolError::Custom(e) => write!(f, "Channel custom close: {:?}", e),
             ProtocolError::Violated => write!(f, "Channel protocol violated"),
         }
     }
 }
 
-impl std::error::Error for InitProtocolError {}
+impl<E: std::fmt::Debug + Send> std::error::Error for InitProtocolError<E> {}
-impl std::error::Error for ProtocolError {}
+impl<E: std::fmt::Debug + Send> std::error::Error for ProtocolError<E> {}

network/protocol/src/handshake.rs

@@ -21,7 +21,8 @@ use tracing::{debug, error, info, trace};
 /// [`RecvProtocol`]: crate::RecvProtocol
 #[async_trait]
 pub trait ReliableDrain {
-    async fn send(&mut self, frame: InitFrame) -> Result<(), ProtocolError>;
+    type CustomErr: std::fmt::Debug + Send;
+    async fn send(&mut self, frame: InitFrame) -> Result<(), ProtocolError<Self::CustomErr>>;
 }
 
 /// Implement this for auto Handshake with [`ReliableDrain`]. See
@@ -30,21 +31,25 @@ pub trait ReliableDrain {
 /// [`ReliableDrain`]: crate::ReliableDrain
 #[async_trait]
 pub trait ReliableSink {
-    async fn recv(&mut self) -> Result<InitFrame, ProtocolError>;
+    type CustomErr: std::fmt::Debug + Send;
+    async fn recv(&mut self) -> Result<InitFrame, ProtocolError<Self::CustomErr>>;
 }
 
 #[async_trait]
-impl<D, S> InitProtocol for (D, S)
+impl<D, S, E> InitProtocol for (D, S)
 where
-    D: ReliableDrain + Send,
+    D: ReliableDrain<CustomErr = E> + Send,
-    S: ReliableSink + Send,
+    S: ReliableSink<CustomErr = E> + Send,
+    E: std::fmt::Debug + Send,
 {
+    type CustomErr = E;
+
     async fn initialize(
         &mut self,
         initializer: bool,
         local_pid: Pid,
         local_secret: u128,
-    ) -> Result<(Pid, Sid, u128), InitProtocolError> {
+    ) -> Result<(Pid, Sid, u128), InitProtocolError<E>> {
         #[cfg(debug_assertions)]
         const WRONG_NUMBER: &str = "Handshake does not contain the magic number required by \
                                     veloren server.\nWe are not sure if you are a valid veloren \
@@ -122,11 +127,11 @@ where
                     Ok(string) => error!(?string, ERR_S),
                     _ => error!(?bytes, ERR_S),
                 }
-                Err(InitProtocolError::Closed)
+                Err(InitProtocolError::NotHandshake)
             },
             _ => {
                 info!("Handshake failed");
-                Err(InitProtocolError::Closed)
+                Err(InitProtocolError::NotHandshake)
             },
         }?;
 
@@ -152,11 +157,11 @@ where
                     Ok(string) => error!(?string, ERR_S),
                     _ => error!(?bytes, ERR_S),
                 }
-                Err(InitProtocolError::Closed)
+                Err(InitProtocolError::NotId)
             },
             _ => {
                 info!("Handshake failed");
-                Err(InitProtocolError::Closed)
+                Err(InitProtocolError::NotId)
             },
         }
     }
@@ -176,7 +181,7 @@ mod tests {
             let _ = p2;
         });
         let (r1, _) = tokio::join!(r1, r2);
-        assert_eq!(r1.unwrap(), Err(InitProtocolError::Closed));
+        assert_eq!(r1.unwrap(), Err(InitProtocolError::Custom(())));
     }
 
     #[tokio::test]
@@ -191,7 +196,7 @@ mod tests {
             })
             .await?;
             let _ = p2.1.recv().await?;
-            Result::<(), InitProtocolError>::Ok(())
+            Result::<(), InitProtocolError<()>>::Ok(())
         });
         let (r1, r2) = tokio::join!(r1, r2);
         assert_eq!(
@@ -218,7 +223,7 @@ mod tests {
         });
         let (r1, r2) = tokio::join!(r1, r2);
         assert_eq!(r1.unwrap(), Err(InitProtocolError::WrongVersion([0, 1, 2])));
-        assert_eq!(r2.unwrap(), Err(InitProtocolError::Closed));
+        assert_eq!(r2.unwrap(), Err(InitProtocolError::Custom(())));
     }
 
     #[tokio::test]
@@ -234,10 +239,10 @@ mod tests {
             .await?;
             let _ = p2.1.recv().await?;
             p2.0.send(InitFrame::Raw(b"Hello World".to_vec())).await?;
-            Result::<(), InitProtocolError>::Ok(())
+            Result::<(), InitProtocolError<()>>::Ok(())
         });
         let (r1, r2) = tokio::join!(r1, r2);
-        assert_eq!(r1.unwrap(), Err(InitProtocolError::Closed));
+        assert_eq!(r1.unwrap(), Err(InitProtocolError::NotId));
         assert_eq!(r2.unwrap(), Ok(()));
     }
 }

network/protocol/src/lib.rs

@@ -86,12 +86,14 @@ use async_trait::async_trait;
 /// Handshake: Used to connect 2 Channels.
 #[async_trait]
 pub trait InitProtocol {
+    type CustomErr: std::fmt::Debug + Send;
+
     async fn initialize(
         &mut self,
         initializer: bool,
         local_pid: Pid,
         secret: u128,
-    ) -> Result<(Pid, Sid, u128), InitProtocolError>;
+    ) -> Result<(Pid, Sid, u128), InitProtocolError<Self::CustomErr>>;
 }
 
 /// Generic Network Send Protocol.
@@ -101,18 +103,20 @@ pub trait InitProtocol {
 ///
 /// A `Stream` MUST be bound to a specific Channel. You MUST NOT switch the
 /// channel to send a stream mid air. We will provide takeover options for
-/// Channel closure in the future to allow keeping a `Stream` over a broker
+/// Channel closure in the future to allow keeping a `Stream` over a broken
 /// Channel.
 ///
 /// [`ProtocolEvent`]: crate::ProtocolEvent
 #[async_trait]
 pub trait SendProtocol {
+    type CustomErr: std::fmt::Debug + Send;
+
     /// YOU MUST inform the `SendProtocol` by any Stream Open BEFORE using it in
     /// `send` and Stream Close AFTER using it in `send` via this fn.
     fn notify_from_recv(&mut self, event: ProtocolEvent);
     /// Send a Event via this Protocol. The `SendProtocol` MAY require `flush`
     /// to be called before actual data is send to the respective `Sink`.
-    async fn send(&mut self, event: ProtocolEvent) -> Result<(), ProtocolError>;
+    async fn send(&mut self, event: ProtocolEvent) -> Result<(), ProtocolError<Self::CustomErr>>;
     /// Flush all buffered messages according to their [`Prio`] and
     /// [`Bandwidth`]. provide the current bandwidth budget (per second) as
     /// well as the `dt` since last call. According to the budget the
@@ -124,7 +128,7 @@ pub trait SendProtocol {
         &mut self,
         bandwidth: Bandwidth,
         dt: std::time::Duration,
-    ) -> Result<Bandwidth, ProtocolError>;
+    ) -> Result<Bandwidth, ProtocolError<Self::CustomErr>>;
 }
 
 /// Generic Network Recv Protocol. See: [`SendProtocol`]
@@ -132,9 +136,11 @@ pub trait SendProtocol {
 /// [`SendProtocol`]: crate::SendProtocol
 #[async_trait]
 pub trait RecvProtocol {
+    type CustomErr: std::fmt::Debug + Send;
+
     /// Either recv an event or fail the Protocol, once the Recv side is closed
     /// it cannot recover from the error.
-    async fn recv(&mut self) -> Result<ProtocolEvent, ProtocolError>;
+    async fn recv(&mut self) -> Result<ProtocolEvent, ProtocolError<Self::CustomErr>>;
 }
 
 /// This crate makes use of UnreliableDrains, they are expected to provide the
@@ -147,8 +153,9 @@ pub trait RecvProtocol {
 /// [`async-channel`]: async-channel
 #[async_trait]
 pub trait UnreliableDrain: Send {
+    type CustomErr: std::fmt::Debug + Send;
     type DataFormat;
-    async fn send(&mut self, data: Self::DataFormat) -> Result<(), ProtocolError>;
+    async fn send(&mut self, data: Self::DataFormat) -> Result<(), ProtocolError<Self::CustomErr>>;
 }
 
 /// Sink counterpart of [`UnreliableDrain`]
@@ -156,6 +163,7 @@ pub trait UnreliableDrain: Send {
 /// [`UnreliableDrain`]: crate::UnreliableDrain
 #[async_trait]
 pub trait UnreliableSink: Send {
+    type CustomErr: std::fmt::Debug + Send;
     type DataFormat;
-    async fn recv(&mut self) -> Result<Self::DataFormat, ProtocolError>;
+    async fn recv(&mut self) -> Result<Self::DataFormat, ProtocolError<Self::CustomErr>>;
 }

network/protocol/src/mpsc.rs

@@ -82,9 +82,11 @@ impl<D> SendProtocol for MpscSendProtocol<D>
 where
     D: UnreliableDrain<DataFormat = MpscMsg>,
 {
+    type CustomErr = D::CustomErr;
+
     fn notify_from_recv(&mut self, _event: ProtocolEvent) {}
 
-    async fn send(&mut self, event: ProtocolEvent) -> Result<(), ProtocolError> {
+    async fn send(&mut self, event: ProtocolEvent) -> Result<(), ProtocolError<Self::CustomErr>> {
         #[cfg(feature = "trace_pedantic")]
         trace!(?event, "send");
         match &event {
@@ -113,7 +115,11 @@ where
         }
     }
 
-    async fn flush(&mut self, _: Bandwidth, _: Duration) -> Result<Bandwidth, ProtocolError> {
+    async fn flush(
+        &mut self,
+        _: Bandwidth,
+        _: Duration,
+    ) -> Result<Bandwidth, ProtocolError<Self::CustomErr>> {
         Ok(0)
     }
 }
@@ -123,7 +129,9 @@ impl<S> RecvProtocol for MpscRecvProtocol<S>
 where
     S: UnreliableSink<DataFormat = MpscMsg>,
 {
-    async fn recv(&mut self) -> Result<ProtocolEvent, ProtocolError> {
+    type CustomErr = S::CustomErr;
+
+    async fn recv(&mut self) -> Result<ProtocolEvent, ProtocolError<Self::CustomErr>> {
         let event = self.sink.recv().await?;
         #[cfg(feature = "trace_pedantic")]
         trace!(?event, "recv");
@@ -153,7 +161,9 @@ impl<D> ReliableDrain for MpscSendProtocol<D>
 where
     D: UnreliableDrain<DataFormat = MpscMsg>,
 {
-    async fn send(&mut self, frame: InitFrame) -> Result<(), ProtocolError> {
+    type CustomErr = D::CustomErr;
+
+    async fn send(&mut self, frame: InitFrame) -> Result<(), ProtocolError<Self::CustomErr>> {
         self.drain.send(MpscMsg::InitFrame(frame)).await
     }
 }
@@ -163,7 +173,9 @@ impl<S> ReliableSink for MpscRecvProtocol<S>
 where
     S: UnreliableSink<DataFormat = MpscMsg>,
 {
-    async fn recv(&mut self) -> Result<InitFrame, ProtocolError> {
+    type CustomErr = S::CustomErr;
+
+    async fn recv(&mut self) -> Result<InitFrame, ProtocolError<Self::CustomErr>> {
         match self.sink.recv().await? {
             MpscMsg::Event(_) => Err(ProtocolError::Violated),
             MpscMsg::InitFrame(f) => Ok(f),
@@ -209,25 +221,30 @@ pub mod test_utils {
 
     #[async_trait]
     impl UnreliableDrain for ACDrain {
+        type CustomErr = ();
         type DataFormat = MpscMsg;
 
-        async fn send(&mut self, data: Self::DataFormat) -> Result<(), ProtocolError> {
+        async fn send(
+            &mut self,
+            data: Self::DataFormat,
+        ) -> Result<(), ProtocolError<Self::CustomErr>> {
             self.sender
                 .send(data)
                 .await
-                .map_err(|_| ProtocolError::Closed)
+                .map_err(|_| ProtocolError::Custom(()))
         }
     }
 
     #[async_trait]
     impl UnreliableSink for ACSink {
+        type CustomErr = ();
         type DataFormat = MpscMsg;
 
-        async fn recv(&mut self) -> Result<Self::DataFormat, ProtocolError> {
+        async fn recv(&mut self) -> Result<Self::DataFormat, ProtocolError<Self::CustomErr>> {
             self.receiver
                 .recv()
                 .await
-                .map_err(|_| ProtocolError::Closed)
+                .map_err(|_| ProtocolError::Custom(()))
         }
     }
 }

network/protocol/src/quic.rs

@@ -147,7 +147,9 @@ where
         }
     }
 
-    async fn recv_into_stream(&mut self) -> Result<QuicDataFormatStream, ProtocolError> {
+    async fn recv_into_stream(
+        &mut self,
+    ) -> Result<QuicDataFormatStream, ProtocolError<S::CustomErr>> {
         let chunk = self.sink.recv().await?;
         let buffer = match chunk.stream {
             QuicDataFormatStream::Main => &mut self.main_buffer,
@@ -181,6 +183,8 @@ impl<D> SendProtocol for QuicSendProtocol<D>
 where
     D: UnreliableDrain<DataFormat = QuicDataFormat>,
 {
+    type CustomErr = D::CustomErr;
+
     fn notify_from_recv(&mut self, event: ProtocolEvent) {
         match event {
             ProtocolEvent::OpenStream {
@@ -206,7 +210,7 @@ where
         }
     }
 
-    async fn send(&mut self, event: ProtocolEvent) -> Result<(), ProtocolError> {
+    async fn send(&mut self, event: ProtocolEvent) -> Result<(), ProtocolError<Self::CustomErr>> {
         #[cfg(feature = "trace_pedantic")]
         trace!(?event, "send");
         match event {
@@ -268,7 +272,7 @@ where
         &mut self,
         bandwidth: Bandwidth,
         dt: Duration,
-    ) -> Result</* actual */ Bandwidth, ProtocolError> {
+    ) -> Result</* actual */ Bandwidth, ProtocolError<Self::CustomErr>> {
         let (frames, _) = self.store.grab(bandwidth, dt);
         //Todo: optimize reserve
         let mut data_frames = 0;
@@ -343,7 +347,9 @@ impl<S> RecvProtocol for QuicRecvProtocol<S>
 where
     S: UnreliableSink<DataFormat = QuicDataFormat>,
 {
-    async fn recv(&mut self) -> Result<ProtocolEvent, ProtocolError> {
+    type CustomErr = S::CustomErr;
+
+    async fn recv(&mut self) -> Result<ProtocolEvent, ProtocolError<Self::CustomErr>> {
         'outer: loop {
             match ITFrame::read_frame(&mut self.main_buffer) {
                 Ok(Some(frame)) => {
@@ -484,7 +490,9 @@ impl<D> ReliableDrain for QuicSendProtocol<D>
 where
     D: UnreliableDrain<DataFormat = QuicDataFormat>,
 {
-    async fn send(&mut self, frame: InitFrame) -> Result<(), ProtocolError> {
+    type CustomErr = D::CustomErr;
+
+    async fn send(&mut self, frame: InitFrame) -> Result<(), ProtocolError<Self::CustomErr>> {
         self.main_buffer.reserve(500);
         frame.write_bytes(&mut self.main_buffer);
         self.drain
@@ -498,7 +506,9 @@ impl<S> ReliableSink for QuicRecvProtocol<S>
 where
     S: UnreliableSink<DataFormat = QuicDataFormat>,
 {
-    async fn recv(&mut self) -> Result<InitFrame, ProtocolError> {
+    type CustomErr = S::CustomErr;
+
+    async fn recv(&mut self) -> Result<InitFrame, ProtocolError<Self::CustomErr>> {
         while self.main_buffer.len() < 100 {
             if self.recv_into_stream().await? == QuicDataFormatStream::Main {
                 if let Some(frame) = InitFrame::read_frame(&mut self.main_buffer) {
@@ -564,9 +574,13 @@ mod test_utils {
 
     #[async_trait]
     impl UnreliableDrain for QuicDrain {
+        type CustomErr = ();
         type DataFormat = QuicDataFormat;
 
-        async fn send(&mut self, data: Self::DataFormat) -> Result<(), ProtocolError> {
+        async fn send(
+            &mut self,
+            data: Self::DataFormat,
+        ) -> Result<(), ProtocolError<Self::CustomErr>> {
             use rand::Rng;
             if matches!(data.stream, QuicDataFormatStream::Unreliable)
                 && rand::thread_rng().gen::<f32>() < self.drop_ratio
@@ -576,19 +590,20 @@ mod test_utils {
             self.sender
                 .send(data)
                 .await
-                .map_err(|_| ProtocolError::Closed)
+                .map_err(|_| ProtocolError::Custom(()))
         }
     }
 
     #[async_trait]
     impl UnreliableSink for QuicSink {
+        type CustomErr = ();
         type DataFormat = QuicDataFormat;
 
-        async fn recv(&mut self) -> Result<Self::DataFormat, ProtocolError> {
+        async fn recv(&mut self) -> Result<Self::DataFormat, ProtocolError<Self::CustomErr>> {
             self.receiver
                 .recv()
                 .await
-                .map_err(|_| ProtocolError::Closed)
+                .map_err(|_| ProtocolError::Custom(()))
         }
     }
 }
@@ -865,7 +880,7 @@ mod tests {
         drop(s);
 
         let e = e.await.unwrap();
-        assert_eq!(e, Err(ProtocolError::Closed));
+        assert_eq!(e, Err(ProtocolError::Custom(())));
     }
 
     #[tokio::test]

network/protocol/src/tcp.rs

@@ -100,6 +100,8 @@ impl<D> SendProtocol for TcpSendProtocol<D>
 where
     D: UnreliableDrain<DataFormat = BytesMut>,
 {
+    type CustomErr = D::CustomErr;
+
     fn notify_from_recv(&mut self, event: ProtocolEvent) {
         match event {
             ProtocolEvent::OpenStream {
@@ -122,7 +124,7 @@ where
         }
     }
 
-    async fn send(&mut self, event: ProtocolEvent) -> Result<(), ProtocolError> {
+    async fn send(&mut self, event: ProtocolEvent) -> Result<(), ProtocolError<Self::CustomErr>> {
         #[cfg(feature = "trace_pedantic")]
         trace!(?event, "send");
         match event {
@@ -170,7 +172,7 @@ where
         &mut self,
         bandwidth: Bandwidth,
         dt: Duration,
-    ) -> Result</* actual */ Bandwidth, ProtocolError> {
+    ) -> Result</* actual */ Bandwidth, ProtocolError<Self::CustomErr>> {
         let (frames, total_bytes) = self.store.grab(bandwidth, dt);
         self.buffer.reserve(total_bytes as usize);
         let mut data_frames = 0;
@@ -228,7 +230,9 @@ impl<S> RecvProtocol for TcpRecvProtocol<S>
 where
     S: UnreliableSink<DataFormat = BytesMut>,
 {
-    async fn recv(&mut self) -> Result<ProtocolEvent, ProtocolError> {
+    type CustomErr = S::CustomErr;
+
+    async fn recv(&mut self) -> Result<ProtocolEvent, ProtocolError<Self::CustomErr>> {
         'outer: loop {
             loop {
                 match ITFrame::read_frame(&mut self.buffer) {
@@ -307,7 +311,9 @@ impl<D> ReliableDrain for TcpSendProtocol<D>
 where
     D: UnreliableDrain<DataFormat = BytesMut>,
 {
-    async fn send(&mut self, frame: InitFrame) -> Result<(), ProtocolError> {
+    type CustomErr = D::CustomErr;
+
+    async fn send(&mut self, frame: InitFrame) -> Result<(), ProtocolError<Self::CustomErr>> {
         let mut buffer = BytesMut::with_capacity(500);
         frame.write_bytes(&mut buffer);
         self.drain.send(buffer).await
@@ -319,7 +325,9 @@ impl<S> ReliableSink for TcpRecvProtocol<S>
 where
     S: UnreliableSink<DataFormat = BytesMut>,
 {
-    async fn recv(&mut self) -> Result<InitFrame, ProtocolError> {
+    type CustomErr = S::CustomErr;
+
+    async fn recv(&mut self) -> Result<InitFrame, ProtocolError<Self::CustomErr>> {
         while self.buffer.len() < 100 {
             let chunk = self.sink.recv().await?;
             self.buffer.extend_from_slice(&chunk);
@@ -371,25 +379,30 @@ mod test_utils {
 
     #[async_trait]
     impl UnreliableDrain for TcpDrain {
+        type CustomErr = ();
         type DataFormat = BytesMut;
 
-        async fn send(&mut self, data: Self::DataFormat) -> Result<(), ProtocolError> {
+        async fn send(
+            &mut self,
+            data: Self::DataFormat,
+        ) -> Result<(), ProtocolError<Self::CustomErr>> {
             self.sender
                 .send(data)
                 .await
-                .map_err(|_| ProtocolError::Closed)
+                .map_err(|_| ProtocolError::Custom(()))
         }
     }
 
     #[async_trait]
     impl UnreliableSink for TcpSink {
+        type CustomErr = ();
         type DataFormat = BytesMut;
 
-        async fn recv(&mut self) -> Result<Self::DataFormat, ProtocolError> {
+        async fn recv(&mut self) -> Result<Self::DataFormat, ProtocolError<Self::CustomErr>> {
             self.receiver
                 .recv()
                 .await
-                .map_err(|_| ProtocolError::Closed)
+                .map_err(|_| ProtocolError::Custom(()))
         }
     }
 }
@@ -659,7 +672,7 @@ mod tests {
         drop(s);
 
         let e = e.await.unwrap();
-        assert_eq!(e, Err(ProtocolError::Closed));
+        assert_eq!(e, Err(ProtocolError::Custom(())));
     }
 
     #[tokio::test]

network/src/api.rs

@@ -1,4 +1,5 @@
 use crate::{
+    channel::ProtocolsError,
     message::{partial_eq_bincode, Message},
     participant::{A2bStreamOpen, S2bShutdownBparticipant},
     scheduler::{A2sConnect, Scheduler},
@@ -106,7 +107,7 @@ pub enum NetworkError {
 pub enum NetworkConnectError {
     /// Either a Pid UUID clash or you are trying to hijack a connection
     InvalidSecret,
-    Handshake(InitProtocolError),
+    Handshake(InitProtocolError<ProtocolsError>),
     Io(std::io::Error),
 }
 

network/src/channel.rs

@@ -193,7 +193,7 @@ impl Protocols {
         metrics: Arc<ProtocolMetrics>,
         s2s_stop_listening_r: oneshot::Receiver<()>,
         c2s_protocol_s: mpsc::UnboundedSender<(Self, Cid)>,
-    ) -> std::io::Result<()> {
+    ) -> io::Result<()> {
         let (mpsc_s, mut mpsc_r) = mpsc::unbounded_channel();
         MPSC_POOL.lock().await.insert(addr, mpsc_s);
         trace!(?addr, "Mpsc Listener bound");
@@ -255,26 +255,17 @@ impl Protocols {
         info!("Connecting Quic to: {}", &addr);
         let connecting = endpoint.connect_with(config, addr, &name).map_err(|e| {
             trace!(?e, "error setting up quic");
-            NetworkConnectError::Io(std::io::Error::new(
+            NetworkConnectError::Io(io::Error::new(io::ErrorKind::ConnectionAborted, e))
-                std::io::ErrorKind::ConnectionAborted,
-                e,
-            ))
         })?;
         let connection = connecting.await.map_err(|e| {
             trace!(?e, "error with quic connection");
-            NetworkConnectError::Io(std::io::Error::new(
+            NetworkConnectError::Io(io::Error::new(io::ErrorKind::ConnectionAborted, e))
-                std::io::ErrorKind::ConnectionAborted,
-                e,
-            ))
         })?;
         Self::new_quic(connection, false, metrics)
             .await
             .map_err(|e| {
                 trace!(?e, "error with quic");
-                NetworkConnectError::Io(std::io::Error::new(
+                NetworkConnectError::Io(io::Error::new(io::ErrorKind::ConnectionAborted, e))
-                    std::io::ErrorKind::ConnectionAborted,
-                    e,
-                ))
             })
     }
 
@@ -286,7 +277,7 @@ impl Protocols {
         metrics: Arc<ProtocolMetrics>,
         s2s_stop_listening_r: oneshot::Receiver<()>,
         c2s_protocol_s: mpsc::UnboundedSender<(Self, Cid)>,
-    ) -> std::io::Result<()> {
+    ) -> io::Result<()> {
         let (_endpoint, mut listener) = match quinn::Endpoint::server(server_config, addr) {
             Ok(v) => v,
             Err(e) => return Err(e),
@@ -378,12 +369,14 @@ impl Protocols {
 
 #[async_trait]
 impl network_protocol::InitProtocol for Protocols {
+    type CustomErr = ProtocolsError;
+
     async fn initialize(
         &mut self,
         initializer: bool,
         local_pid: Pid,
         secret: u128,
-    ) -> Result<(Pid, Sid, u128), InitProtocolError> {
+    ) -> Result<(Pid, Sid, u128), InitProtocolError<Self::CustomErr>> {
         match self {
             Protocols::Tcp(p) => p.initialize(initializer, local_pid, secret).await,
             Protocols::Mpsc(p) => p.initialize(initializer, local_pid, secret).await,
@@ -395,6 +388,8 @@ impl network_protocol::InitProtocol for Protocols {
 
 #[async_trait]
 impl network_protocol::SendProtocol for SendProtocols {
+    type CustomErr = ProtocolsError;
+
     fn notify_from_recv(&mut self, event: ProtocolEvent) {
         match self {
             SendProtocols::Tcp(s) => s.notify_from_recv(event),
@@ -404,7 +399,7 @@ impl network_protocol::SendProtocol for SendProtocols {
         }
     }
 
-    async fn send(&mut self, event: ProtocolEvent) -> Result<(), ProtocolError> {
+    async fn send(&mut self, event: ProtocolEvent) -> Result<(), ProtocolError<Self::CustomErr>> {
         match self {
             SendProtocols::Tcp(s) => s.send(event).await,
             SendProtocols::Mpsc(s) => s.send(event).await,
@@ -417,7 +412,7 @@ impl network_protocol::SendProtocol for SendProtocols {
         &mut self,
         bandwidth: Bandwidth,
         dt: Duration,
-    ) -> Result<Bandwidth, ProtocolError> {
+    ) -> Result<Bandwidth, ProtocolError<Self::CustomErr>> {
         match self {
             SendProtocols::Tcp(s) => s.flush(bandwidth, dt).await,
             SendProtocols::Mpsc(s) => s.flush(bandwidth, dt).await,
@@ -429,7 +424,9 @@ impl network_protocol::SendProtocol for SendProtocols {
 
 #[async_trait]
 impl network_protocol::RecvProtocol for RecvProtocols {
-    async fn recv(&mut self) -> Result<ProtocolEvent, ProtocolError> {
+    type CustomErr = ProtocolsError;
+
+    async fn recv(&mut self) -> Result<ProtocolEvent, ProtocolError<Self::CustomErr>> {
         match self {
             RecvProtocols::Tcp(r) => r.recv().await,
             RecvProtocols::Mpsc(r) => r.recv().await,
@@ -439,6 +436,32 @@ impl network_protocol::RecvProtocol for RecvProtocols {
     }
 }
 
+#[derive(Debug)]
+pub enum MpscError {
+    Send(tokio::sync::mpsc::error::SendError<network_protocol::MpscMsg>),
+    Recv,
+}
+
+#[cfg(feature = "quic")]
+#[derive(Debug)]
+pub enum QuicError {
+    Send(std::io::Error),
+    Connection(quinn::ConnectionError),
+    Write(quinn::WriteError),
+    Read(quinn::ReadError),
+    InternalMpsc,
+}
+
+/// Error types for Protocols
+#[derive(Debug)]
+pub enum ProtocolsError {
+    Tcp(std::io::Error),
+    Udp(std::io::Error),
+    #[cfg(feature = "quic")]
+    Quic(QuicError),
+    Mpsc(MpscError),
+}
+
 ///////////////////////////////////////
 //// TCP
 #[derive(Debug)]
@@ -454,26 +477,31 @@ pub struct TcpSink {
 
 #[async_trait]
 impl UnreliableDrain for TcpDrain {
+    type CustomErr = ProtocolsError;
     type DataFormat = BytesMut;
 
-    async fn send(&mut self, data: Self::DataFormat) -> Result<(), ProtocolError> {
+    async fn send(&mut self, data: Self::DataFormat) -> Result<(), ProtocolError<Self::CustomErr>> {
-        match self.half.write_all(&data).await {
+        self.half
-            Ok(()) => Ok(()),
+            .write_all(&data)
-            Err(_) => Err(ProtocolError::Closed),
+            .await
-        }
+            .map_err(|e| ProtocolError::Custom(ProtocolsError::Tcp(e)))
     }
 }
 
 #[async_trait]
 impl UnreliableSink for TcpSink {
+    type CustomErr = ProtocolsError;
     type DataFormat = BytesMut;
 
-    async fn recv(&mut self) -> Result<Self::DataFormat, ProtocolError> {
+    async fn recv(&mut self) -> Result<Self::DataFormat, ProtocolError<Self::CustomErr>> {
         self.buffer.resize(1500, 0u8);
         match self.half.read(&mut self.buffer).await {
-            Ok(0) => Err(ProtocolError::Closed),
+            Ok(0) => Err(ProtocolError::Custom(ProtocolsError::Tcp(io::Error::new(
+                io::ErrorKind::BrokenPipe,
+                "read returned 0 bytes",
+            )))),
             Ok(n) => Ok(self.buffer.split_to(n)),
-            Err(_) => Err(ProtocolError::Closed),
+            Err(e) => Err(ProtocolError::Custom(ProtocolsError::Tcp(e))),
         }
     }
 }
@@ -492,22 +520,27 @@ pub struct MpscSink {
 
 #[async_trait]
 impl UnreliableDrain for MpscDrain {
+    type CustomErr = ProtocolsError;
     type DataFormat = MpscMsg;
 
-    async fn send(&mut self, data: Self::DataFormat) -> Result<(), ProtocolError> {
+    async fn send(&mut self, data: Self::DataFormat) -> Result<(), ProtocolError<Self::CustomErr>> {
         self.sender
             .send(data)
             .await
-            .map_err(|_| ProtocolError::Closed)
+            .map_err(|e| ProtocolError::Custom(ProtocolsError::Mpsc(MpscError::Send(e))))
     }
 }
 
 #[async_trait]
 impl UnreliableSink for MpscSink {
+    type CustomErr = ProtocolsError;
     type DataFormat = MpscMsg;
 
-    async fn recv(&mut self) -> Result<Self::DataFormat, ProtocolError> {
+    async fn recv(&mut self) -> Result<Self::DataFormat, ProtocolError<Self::CustomErr>> {
-        self.receiver.recv().await.ok_or(ProtocolError::Closed)
+        self.receiver
+            .recv()
+            .await
+            .ok_or(ProtocolError::Custom(ProtocolsError::Mpsc(MpscError::Recv)))
     }
 }
 
@@ -560,10 +593,11 @@ fn spawn_new(
 #[cfg(feature = "quic")]
 #[async_trait]
 impl UnreliableDrain for QuicDrain {
+    type CustomErr = ProtocolsError;
     type DataFormat = QuicDataFormat;
 
-    async fn send(&mut self, data: Self::DataFormat) -> Result<(), ProtocolError> {
+    async fn send(&mut self, data: Self::DataFormat) -> Result<(), ProtocolError<Self::CustomErr>> {
-        match match data.stream {
+        match data.stream {
             QuicDataFormatStream::Main => self.main.write_all(&data.data).await,
             QuicDataFormatStream::Unreliable => unimplemented!(),
             QuicDataFormatStream::Reliable(sid) => {
@@ -575,41 +609,43 @@ impl UnreliableDrain for QuicDrain {
                         // IF the buffer is empty this was created localy and WE are allowed to
                         // open_bi(), if not, we NEED to block on sendstreams_r
                         if data.data.is_empty() {
-                            match self.con.open_bi().await {
+                            let (mut sendstream, recvstream) =
-                                Ok((mut sendstream, recvstream)) => {
+                                self.con.open_bi().await.map_err(|e| {
+                                    ProtocolError::Custom(ProtocolsError::Quic(
+                                        QuicError::Connection(e),
+                                    ))
+                                })?;
                             // send SID as first msg
-                                    if sendstream.write_u64(sid.get_u64()).await.is_err() {
+                            sendstream.write_u64(sid.get_u64()).await.map_err(|e| {
-                                        return Err(ProtocolError::Closed);
+                                ProtocolError::Custom(ProtocolsError::Quic(QuicError::Send(e)))
-                                    }
+                            })?;
                             spawn_new(recvstream, Some(sid), &self.recvstreams_s);
                             vacant.insert(sendstream).write_all(&data.data).await
-                                },
-                                Err(_) => return Err(ProtocolError::Closed),
-                            }
                         } else {
-                            let sendstream = self
+                            let sendstream =
-                                .sendstreams_r
+                                self.sendstreams_r
                                     .recv()
                                     .await
-                                .ok_or(ProtocolError::Closed)?;
+                                    .ok_or(ProtocolError::Custom(ProtocolsError::Quic(
+                                        QuicError::InternalMpsc,
+                                    )))?;
                             vacant.insert(sendstream).write_all(&data.data).await
                         }
                     },
                 }
             },
-        } {
-            Ok(()) => Ok(()),
-            Err(_) => Err(ProtocolError::Closed),
         }
+        .map_err(|e| ProtocolError::Custom(ProtocolsError::Quic(QuicError::Write(e))))
     }
 }
 
 #[cfg(feature = "quic")]
 #[async_trait]
 impl UnreliableSink for QuicSink {
+    type CustomErr = ProtocolsError;
     type DataFormat = QuicDataFormat;
 
-    async fn recv(&mut self) -> Result<Self::DataFormat, ProtocolError> {
+    async fn recv(&mut self) -> Result<Self::DataFormat, ProtocolError<Self::CustomErr>> {
         let (mut buffer, result, mut recvstream, id) = loop {
             use futures_util::FutureExt;
             // first handle all bi streams!
@@ -620,20 +656,20 @@ impl UnreliableSink for QuicSink {
             };
 
             if let Some(remote_stream) = a {
-                match remote_stream {
+                let (sendstream, mut recvstream) = remote_stream.map_err(|e| {
-                    Ok((sendstream, mut recvstream)) => {
+                    ProtocolError::Custom(ProtocolsError::Quic(QuicError::Connection(e)))
+                })?;
                 let sid = match recvstream.read_u64().await {
                     Ok(u64::MAX) => None, //unreliable
                     Ok(sid) => Some(Sid::new(sid)),
                     Err(_) => return Err(ProtocolError::Violated),
                 };
                 if self.sendstreams_s.send(sendstream).is_err() {
-                            return Err(ProtocolError::Closed);
+                    return Err(ProtocolError::Custom(ProtocolsError::Quic(
+                        QuicError::InternalMpsc,
+                    )));
                 }
                 spawn_new(recvstream, sid, &self.recvstreams_s);
-                    },
-                    Err(_) => return Err(ProtocolError::Closed),
-                }
             }
 
             if let Some(data) = b {
@@ -642,7 +678,12 @@ impl UnreliableSink for QuicSink {
         };
 
         let r = match result {
-            Ok(Some(0)) => Err(ProtocolError::Closed),
+            Ok(Some(0)) => Err(ProtocolError::Custom(ProtocolsError::Quic(
+                QuicError::Send(io::Error::new(
+                    io::ErrorKind::BrokenPipe,
+                    "read returned 0 bytes",
+                )),
+            ))),
             Ok(Some(n)) => Ok(QuicDataFormat {
                 stream: match id {
                     Some(id) => QuicDataFormatStream::Reliable(id),
@@ -650,8 +691,15 @@ impl UnreliableSink for QuicSink {
                 },
                 data: buffer.split_to(n),
             }),
-            Ok(None) => Err(ProtocolError::Closed),
+            Ok(None) => Err(ProtocolError::Custom(ProtocolsError::Quic(
-            Err(_) => Err(ProtocolError::Closed),
+                QuicError::Send(io::Error::new(
+                    io::ErrorKind::BrokenPipe,
+                    "read returned None",
+                )),
+            ))),
+            Err(e) => Err(ProtocolError::Custom(ProtocolsError::Quic(
+                QuicError::Read(e),
+            ))),
         }?;
 
         let streams_s_clone = self.recvstreams_s.clone();
@@ -739,6 +787,15 @@ mod tests {
         drop(s);
         let e = e.await.unwrap();
         assert!(e.is_err());
-        assert_eq!(e.unwrap_err(), ProtocolError::Closed);
+        assert!(matches!(e, Err(..)));
+        let e = e.unwrap_err();
+        assert!(matches!(e, ProtocolError::Custom(..)));
+        assert!(matches!(e, ProtocolError::Custom(ProtocolsError::Tcp(_))));
+        match e {
+            ProtocolError::Custom(ProtocolsError::Tcp(e)) => {
+                assert_eq!(e.kind(), io::ErrorKind::BrokenPipe)
+            },
+            _ => panic!("invalid error"),
+        }
     }
 }

network/src/participant.rs

@@ -1,6 +1,6 @@
 use crate::{
     api::{ParticipantError, Stream},
-    channel::{Protocols, RecvProtocols, SendProtocols},
+    channel::{Protocols, ProtocolsError, RecvProtocols, SendProtocols},
     metrics::NetworkMetrics,
     util::DeferredTracer,
 };
@@ -371,7 +371,7 @@ impl BParticipant {
                 self.metrics
                     .participant_bandwidth(&self.remote_pid_string, part_bandwidth);
                 let _ = b2a_bandwidth_stats_s.send(part_bandwidth);
-                let r: Result<(), network_protocol::ProtocolError> = Ok(());
+                let r: Result<(), network_protocol::ProtocolError<ProtocolsError>> = Ok(());
                 r
             }
             .await;