Fix half closed (#324)

* don't call `close` in `remoteClose`

* make sure timeout are properly propagted

* fix tests

* adding remote close write test

libp2p/muxers/mplex/lpchannel.nim

@@ -138,12 +138,9 @@ proc closeRemote*(s: LPChannel) {.async.} =
   trace "got EOF, closing channel"
   try:
     await s.drainBuffer()
-
     s.isEof = true # set EOF immediately to prevent further reads
-    await s.close() # close local end
-
-    # call to avoid leaks
-    await procCall BufferStream(s).close() # close parent bufferstream
+    # close parent bufferstream to prevent further reads
+    await procCall BufferStream(s).close()
 
     trace "channel closed on EOF"
   except CancelledError as exc:

libp2p/protocols/secure/secure.nim

@@ -28,11 +28,13 @@ type
 proc init*[T: SecureConn](C: type T,
                           conn: Connection,
                           peerInfo: PeerInfo,
-                          observedAddr: Multiaddress): T =
+                          observedAddr: Multiaddress,
+                          timeout: Duration = DefaultConnectionTimeout): T =
   result = C(stream: conn,
              peerInfo: peerInfo,
              observedAddr: observedAddr,
-             closeEvent: conn.closeEvent)
+             closeEvent: conn.closeEvent,
+             timeout: timeout)
   result.initStream()
 
 method initStream*(s: SecureConn) =

libp2p/stream/bufferstream.nim

@@ -143,8 +143,10 @@ proc initBufferStream*(s: BufferStream,
   trace "created bufferstream", oid = $s.oid
 
 proc newBufferStream*(handler: WriteHandler = nil,
-                      size: int = DefaultBufferSize): BufferStream =
+                      size: int = DefaultBufferSize,
+                      timeout: Duration = DefaultConnectionTimeout): BufferStream =
   new result
+  result.timeout = timeout
   result.initBufferStream(handler, size)
 
 proc popFirst*(s: BufferStream): byte =

libp2p/stream/connection.nim

@@ -7,7 +7,7 @@
 ## This file may not be copied, modified, or distributed except according to
 ## those terms.
 
-import hashes
+import hashes, oids
 import chronicles, chronos, metrics
 import lpstream,
        ../multiaddress,
@@ -20,7 +20,7 @@ logScope:
 
 const
   ConnectionTrackerName* = "libp2p.connection"
-  DefaultConnectionTimeout* = 1.minutes
+  DefaultConnectionTimeout* = 5.minutes
 
 type
   TimeoutHandler* = proc(): Future[void] {.gcsafe.}
@@ -73,7 +73,14 @@ method initStream*(s: Connection) =
   procCall LPStream(s).initStream()
   s.closeEvent = newAsyncEvent()
 
+  if isNil(s.timeoutHandler):
+    s.timeoutHandler = proc() {.async.} =
+      await s.close()
+
+  trace "timeout", timeout = $s.timeout.millis
   doAssert(isNil(s.timerTaskFut))
+  # doAssert(s.timeout > 0.millis)
+  if s.timeout > 0.millis:
     s.timerTaskFut = s.timeoutMonitor()
 
   inc getConnectionTracker().opened

tests/testmplex.nim

@@ -135,18 +135,20 @@ suite "Mplex":
       let
         conn = newBufferStream(
           proc (data: seq[byte]) {.gcsafe, async.} =
-            discard
+            discard,
+          timeout = 5.minutes
         )
         chann = LPChannel.init(1, conn, true)
 
       await chann.pushTo(("Hello!").toBytes)
-      let closeFut = chann.closeRemote()
 
       var data = newSeq[byte](6)
-      await chann.readExactly(addr data[0], 6) # this should work, since there is data in the buffer
+      await chann.readExactly(addr data[0], 3)
+      let closeFut = chann.closeRemote() # closing channel
+      let readFut = chann.readExactly(addr data[3], 3)
+      await all(closeFut, readFut)
       try:
-        await chann.readExactly(addr data[0], 6) # this should throw
-        await closeFut
+        await chann.readExactly(addr data[0], 6) # this should fail now
       except LPStreamEOFError:
         result = true
       finally:
@@ -156,6 +158,29 @@ suite "Mplex":
     check:
       waitFor(testClosedForRead()) == true
 
+  test "half closed - channel should allow writting on remote close":
+    proc testClosedForRead(): Future[bool] {.async.} =
+      let
+        testData = "Hello!".toBytes
+        conn = newBufferStream(
+          proc (data: seq[byte]) {.gcsafe, async.} =
+            discard
+          , timeout = 5.minutes
+        )
+        chann = LPChannel.init(1, conn, true)
+
+      var data = newSeq[byte](6)
+      await chann.closeRemote() # closing channel
+      try:
+        await chann.writeLp(testData)
+        return true
+      finally:
+        await chann.close()
+        await conn.close()
+
+    check:
+      waitFor(testClosedForRead()) == true
+
   test "should not allow pushing data to channel when remote end closed":
     proc testResetWrite(): Future[bool] {.async.} =
       proc writeHandler(data: seq[byte]) {.async, gcsafe.} = discard
@@ -318,6 +343,7 @@ suite "Mplex":
         bigseq.add(uint8(rand(uint('A')..uint('z'))))
 
       proc connHandler(conn: Connection) {.async, gcsafe.} =
+        try:
           let mplexListen = Mplex.init(conn)
           mplexListen.streamHandler = proc(stream: Connection)
             {.async, gcsafe.} =
@@ -328,7 +354,12 @@ suite "Mplex":
             listenJob.complete()
 
           await mplexListen.handle()
+          await sleepAsync(1.seconds) # give chronos some slack to process things
           await mplexListen.close()
+        except CancelledError as exc:
+          raise exc
+        except CatchableError as exc:
+          check false
 
       let transport1: TcpTransport = TcpTransport.init()
       let listenFut = await transport1.listen(ma, connHandler)