Fix WS observed address (#631)

* Fix WS observed address

* Unify tcptransport & wstransport

libp2p/transports/tcptransport.nim

@@ -71,7 +71,7 @@ proc connHandler*(self: TcpTransport,
   try:
     observedAddr = MultiAddress.init(client.remoteAddress).tryGet()
   except CatchableError as exc:
-    trace "Connection setup failed", exc = exc.msg
+    trace "Failed to create observedAddr", exc = exc.msg
     if not(isNil(client) and client.closed):
       await client.closeWait()
     raise exc

libp2p/transports/wstransport.nim

@@ -150,13 +150,36 @@ method stop*(self: WsTransport) {.async, gcsafe.} =
   except CatchableError as exc:
     trace "Error shutting down ws transport", exc = exc.msg
 
-proc trackConnection(self: WsTransport, conn: WsStream, dir: Direction) =
+proc connHandler(self: WsTransport,
+                 stream: WsSession,
+                 dir: Direction): Future[Connection] {.async.} =
+  let observedAddr =
+    try:
+      let
+        codec =
+          if self.secure:
+            MultiAddress.init("/wss")
+          else:
+            MultiAddress.init("/ws")
+        remoteAddr = stream.stream.reader.tsource.remoteAddress
+
+      MultiAddress.init(remoteAddr).tryGet() & codec.tryGet()
+    except CatchableError as exc:
+      trace "Failed to create observedAddr", exc = exc.msg
+      if not(isNil(stream) and stream.stream.reader.closed):
+        await stream.close()
+      raise exc
+
+  let conn = WsStream.init(stream, dir)
+  conn.observedAddr = observedAddr
+
   self.connections[dir].add(conn)
   proc onClose() {.async.} =
     await conn.session.stream.reader.join()
     self.connections[dir].keepItIf(it != conn)
     trace "Cleaned up client"
   asyncSpawn onClose()
+  return conn
 
 method accept*(self: WsTransport): Future[Connection] {.async, gcsafe.} =
   ## accept a new WS connection
@@ -169,10 +192,8 @@ method accept*(self: WsTransport): Future[Connection] {.async, gcsafe.} =
     let
       req = await self.httpserver.accept()
       wstransp = await self.wsserver.handleRequest(req)
-      stream = WsStream.init(wstransp, Direction.In)
 
-    self.trackConnection(stream, Direction.In)
+    return await self.connHandler(wstransp, Direction.In)
-    return stream
   except TransportOsError as exc:
     debug "OS Error", exc = exc.msg
   except TransportTooManyError as exc:
@@ -199,10 +220,8 @@ method dial*(
       "",
       secure = secure,
       flags = self.tlsFlags)
-    stream = WsStream.init(transp, Direction.Out)
 
-  self.trackConnection(stream, Direction.Out)
+  return await self.connHandler(transp, Direction.Out)
-  return stream
 
 method handles*(t: WsTransport, address: MultiAddress): bool {.gcsafe.} =
   if procCall Transport(t).handles(address):

tests/commontransport.nim

@@ -25,6 +25,34 @@ proc commonTransportTest*(name: string, prov: TransportProvider, ma: string) =
       check transport1.handles(transport1.ma)
       await transport1.stop()
 
+    asyncTest "e2e: handle observedAddr":
+      let ma: MultiAddress = Multiaddress.init(ma).tryGet()
+
+      let transport1 = prov()
+      await transport1.start(ma)
+
+      let transport2 = prov()
+
+      proc acceptHandler() {.async, gcsafe.} =
+        let conn = await transport1.accept()
+        check transport1.handles(conn.observedAddr)
+        await conn.close()
+
+      let handlerWait = acceptHandler()
+
+      let conn = await transport2.dial(transport1.ma)
+
+      check transport2.handles(conn.observedAddr)
+
+      await conn.close() #for some protocols, closing requires actively reading, so we must close here
+
+      await allFuturesThrowing(
+        allFinished(
+          transport1.stop(),
+          transport2.stop()))
+
+      await handlerWait.wait(1.seconds) # when no issues will not wait that long!
+
     asyncTest "e2e: handle write":
       let ma: MultiAddress = Multiaddress.init(ma).tryGet()