Add some changes that enable mixnet adapter. There's also loads of debug prints and whatnot that will get cleaned up later.

libp2p/dialer.nim

@@ -54,13 +54,29 @@ proc dialAndUpgrade(
     address: MultiAddress,
     dir = Direction.Out,
 ): Future[Muxer] {.async.} =
+  echo "\n\n> Dialer::dialAndUpgrade"
   for transport in self.transports: # for each transport
     if transport.handles(address): # check if it can dial it
       trace "Dialing address", address, peerId = peerId.get(default(PeerId)), hostname
       let dialed =
         try:
           libp2p_total_dial_attempts.inc()
-          await transport.dial(hostname, address, peerId)
+          echo "> Dialer::dialAndUpgrade::0"
+          # echo hostname
+          # echo address
+          # echo peerId
+          echo transport.log()
+          echo type(transport)
+          echo type(hostname)
+          echo type(address)
+          echo type(peerId)
+          let dialFut = transport.dial(hostname, address, peerId)
+          echo "> Dialer::dialAndUpgrade::after-dial"
+          let myD = await dialFut
+          echo "< Dialer::dialAndUpgrade::after-dial"
+          echo myD.shortLog()
+          echo "<<<< Dialer::dialAndUpgrade::after-dial"
+          myD
         except CancelledError as exc:
           trace "Dialing canceled",
             description = exc.msg, peerId = peerId.get(default(PeerId))
@@ -70,7 +86,8 @@ proc dialAndUpgrade(
             description = exc.msg, peerId = peerId.get(default(PeerId))
           libp2p_failed_dials.inc()
           return nil # Try the next address
-
+      echo "> Dialer::dialAndUpgrade::1"
+      echo dialed.shortLog()
       libp2p_successful_dials.inc()
 
       let mux =
@@ -80,6 +97,11 @@ proc dialAndUpgrade(
           # The if below is more general and might handle other use cases in the future.
           if dialed.dir != dir:
             dialed.dir = dir
+          echo "> Dialer::dialAndUpgrade::2"
+          echo transport.log()
+          echo dialed.shortLog()
+          # TODO: dialed should be MixnetConnectionAdapter
+          echo "< Dialer::dialAndUpgrade::2"
           await transport.upgrade(dialed, peerId)
         except CancelledError as exc:
           await dialed.close()
@@ -97,7 +119,7 @@ proc dialAndUpgrade(
 
           # Try other address
           return nil
-
+      echo "> Dialer::dialAndUpgrade::3"
       doAssert not isNil(mux), "connection died after upgrade " & $dialed.dir
       debug "Dial successful", peerId = mux.connection.peerId
       return mux
@@ -170,6 +192,7 @@ proc internalConnect(
     reuseConnection = true,
     dir = Direction.Out,
 ): Future[Muxer] {.async.} =
+  echo "> Dialer::internalConnect"
   if Opt.some(self.localPeerId) == peerId:
     raise newException(CatchableError, "can't dial self!")
 
@@ -184,16 +207,17 @@ proc internalConnect(
           return mux
 
     let slot = self.connManager.getOutgoingSlot(forceDial)
+    echo "> Dialer::internalConnect::0"
     let muxed =
       try:
         await self.dialAndUpgrade(peerId, addrs, dir)
       except CatchableError as exc:
         slot.release()
         raise exc
+    echo "> Dialer::internalConnect::1"
     slot.trackMuxer(muxed)
     if isNil(muxed): # None of the addresses connected
       raise newException(DialFailedError, "Unable to establish outgoing link")
-
     try:
       self.connManager.storeMuxer(muxed)
       await self.peerStore.identify(muxed)
@@ -302,7 +326,7 @@ method dial*(
   ## create a protocol stream and establish
   ## a connection if one doesn't exist already
   ##
-
+  echo "> Dialer::dial"
   var
     conn: Muxer
     stream: Connection
@@ -315,14 +339,18 @@ method dial*(
       await conn.close()
 
   try:
+    echo "> Dialer::0"
     trace "Dialing (new)", peerId, protos
     conn = await self.internalConnect(Opt.some(peerId), addrs, forceDial)
+    echo "> Dialer::1"
     trace "Opening stream", conn
     stream = await self.connManager.getStream(conn)
+    echo "> Dialer::2"
 
     if isNil(stream):
       raise newException(DialFailedError, "Couldn't get muxed stream")
 
+    echo "< Dialer::dial"
     return await self.negotiateStream(stream, protos)
   except CancelledError as exc:
     trace "Dial canceled", conn

libp2p/multistream.nim

@@ -52,7 +52,9 @@ proc select*(
 ): Future[string] {.async: (raises: [CancelledError, LPStreamError, MultiStreamError]).} =
   trace "initiating handshake", conn, codec = Codec
   ## select a remote protocol
+  echo "> MultiStreamSelect::select"
   await conn.writeLp(Codec & "\n") # write handshake
+  echo "> MultiStreamSelect::select - 0"
   if proto.len() > 0:
     trace "selecting proto", conn, proto = proto[0]
     await conn.writeLp((proto[0] & "\n")) # select proto
@@ -67,6 +69,7 @@ proc select*(
     trace "multistream handshake success", conn
 
   if proto.len() == 0: # no protocols, must be a handshake call
+    echo "< MultiStreamSelect::select - Handshake"
     return Codec
   else:
     s = string.fromBytes(await conn.readLp(MsgSize)) # read the first proto
@@ -75,6 +78,7 @@ proc select*(
     if s == proto[0]:
       trace "successfully selected ", conn, proto = proto[0]
       conn.protocol = proto[0]
+      echo "< MultiStreamSelect::select - ", proto[0]
       return proto[0]
     elif proto.len > 1:
       # Try to negotiate alternatives

libp2p/protocols/ping.nim

@@ -52,6 +52,7 @@ proc new*(
 
 method init*(p: Ping) =
   proc handle(conn: Connection, proto: string) {.async.} =
+    echo "######### Before Ping #########"
     try:
       trace "handling ping", conn
       var buf: array[PingSize, byte]
@@ -64,13 +65,15 @@ method init*(p: Ping) =
       raise exc
     except CatchableError as exc:
       trace "exception in ping handler", description = exc.msg, conn
+    echo "######### After Ping #########"
 
   p.handler = handle
   p.codec = PingCodec
 
 proc ping*(p: Ping, conn: Connection): Future[Duration] {.async, public.} =
   ## Sends ping to `conn`, returns the delay
-
+  echo "######### Pinging #########"
+  echo conn.shortLog()
   trace "initiating ping", conn
 
   var
@@ -82,9 +85,12 @@ proc ping*(p: Ping, conn: Connection): Future[Duration] {.async, public.} =
   let startTime = Moment.now()
 
   trace "sending ping", conn
+  echo "# Before Write. Is conn closed? ", conn.isClosed, conn.isEof
   await conn.write(@randomBuf)
+  echo "# After Write. Is conn closed? ", conn.isClosed, conn.isEof
 
   await conn.readExactly(addr resultBuf[0], PingSize)
+  echo "# After Read. Is conn closed? ", conn.isClosed
 
   let responseDur = Moment.now() - startTime
 
@@ -95,4 +101,5 @@ proc ping*(p: Ping, conn: Connection): Future[Duration] {.async, public.} =
       raise newException(WrongPingAckError, "Incorrect ping data from peer!")
 
   trace "valid ping response", conn
+  echo "######### Pinged #########"
   return responseDur

libp2p/protocols/secure/secure.nim

@@ -148,6 +148,7 @@ method init*(s: Secure) =
     try:
       # We don't need the result but we
       # definitely need to await the handshake
+      echo "Secure::handle"
       discard await s.handleConn(conn, false, Opt.none(PeerId))
       trace "connection secured", conn
     except CancelledError as exc:
@@ -165,6 +166,7 @@ method secure*(
 ): Future[Connection] {.
     async: (raises: [CancelledError, LPStreamError], raw: true), base
 .} =
+  echo "> Secure::secure"
   s.handleConn(conn, conn.dir == Direction.Out, peerId)
 
 method readOnce*(

libp2p/stream/connection.nim

@@ -40,14 +40,11 @@ type
 
 proc timeoutMonitor(s: Connection) {.async: (raises: []).}
 
-func shortLog*(conn: Connection): string =
+method shortLog*(conn: Connection): string {.raises: [].} =
-  try:
+  if conn == nil:
-    if conn == nil:
+    "Connection(nil)"
-      "Connection(nil)"
+  else:
-    else:
+    &"{shortLog(conn.peerId)}:{conn.oid}:{conn.protocol}"
-      &"{shortLog(conn.peerId)}:{conn.oid}"
-  except ValueError as exc:
-    raiseAssert(exc.msg)
 
 chronicles.formatIt(Connection):
   shortLog(it)

libp2p/stream/lpstream.nim

@@ -112,7 +112,7 @@ method initStream*(s: LPStream) {.base.} =
   trackCounter(s.objName)
   trace "Stream created", s, objName = s.objName, dir = $s.dir
 
-proc join*(
+method join*(
     s: LPStream
 ): Future[void] {.async: (raises: [CancelledError], raw: true), public.} =
   ## Wait for the stream to be closed
@@ -134,9 +134,10 @@ method readOnce*(
   ## available
   raiseAssert("Not implemented!")
 
-proc readExactly*(
+method readExactly*(
     s: LPStream, pbytes: pointer, nbytes: int
 ): Future[void] {.async: (raises: [CancelledError, LPStreamError]), public.} =
+  # echo "readExactly. Is conn closed? ", s.isClosed
   ## Waits for `nbytes` to be available, then read
   ## them and return them
   if s.atEof:
@@ -159,9 +160,9 @@ proc readExactly*(
 
   if read == 0:
     doAssert s.atEof()
-    trace "couldn't read all bytes, stream EOF", s, nbytes, read
     # Re-readOnce to raise a more specific error than EOF
     # Raise EOF if it doesn't raise anything(shouldn't happen)
+    # echo "readExactly3. Is conn closed? ", s.isClosed
     discard await s.readOnce(addr pbuffer[read], nbytes - read)
     warn "Read twice while at EOF"
     raise newLPStreamEOFError()
@@ -170,7 +171,7 @@ proc readExactly*(
     trace "couldn't read all bytes, incomplete data", s, nbytes, read
     raise newLPStreamIncompleteError()
 
-proc readLine*(
+method readLine*(
     s: LPStream, limit = 0, sep = "\r\n"
 ): Future[string] {.async: (raises: [CancelledError, LPStreamError]), public.} =
   ## Reads up to `limit` bytes are read, or a `sep` is found
@@ -198,7 +199,7 @@ proc readLine*(
       if len(result) == lim:
         break
 
-proc readVarint*(
+method readVarint*(
     conn: LPStream
 ): Future[uint64] {.async: (raises: [CancelledError, LPStreamError]), public.} =
   var buffer: array[10, byte]
@@ -217,7 +218,7 @@ proc readVarint*(
   if true: # can't end with a raise apparently
     raise (ref InvalidVarintError)(msg: "Cannot parse varint")
 
-proc readLp*(
+method readLp*(
     s: LPStream, maxSize: int
 ): Future[seq[byte]] {.async: (raises: [CancelledError, LPStreamError]), public.} =
   ## read length prefixed msg, with the length encoded as a varint
@@ -243,7 +244,7 @@ method write*(
   # Write `msg` to stream, waiting for the write to be finished
   raiseAssert("Not implemented!")
 
-proc writeLp*(
+method writeLp*(
     s: LPStream, msg: openArray[byte]
 ): Future[void] {.async: (raises: [CancelledError, LPStreamError], raw: true), public.} =
   ## Write `msg` with a varint-encoded length prefix
@@ -253,7 +254,7 @@ proc writeLp*(
   buf[vbytes.len ..< buf.len] = msg
   s.write(buf)
 
-proc writeLp*(
+method writeLp*(
     s: LPStream, msg: string
 ): Future[void] {.async: (raises: [CancelledError, LPStreamError], raw: true), public.} =
   writeLp(s, msg.toOpenArrayByte(0, msg.high))
@@ -305,6 +306,7 @@ proc closeWithEOF*(s: LPStream): Future[void] {.async: (raises: []), public.} =
   ##
 
   trace "Closing with EOF", s
+  echo "> Closing with EOF: ", s.shortLog()
   if s.closedWithEOF:
     trace "Already closed"
     return

libp2p/transports/tcptransport.nim

@@ -226,6 +226,7 @@ method accept*(self: TcpTransport): Future[Connection] =
   proc impl(
       self: TcpTransport
   ): Future[Connection] {.async: (raises: [transport.TransportError, CancelledError]).} =
+    echo "> TcpTransport::accept"
     proc cancelAcceptFuts() =
       for fut in self.acceptFuts:
         if not fut.completed():
@@ -239,19 +240,23 @@ method accept*(self: TcpTransport): Future[Connection] =
     elif self.acceptFuts.len == 0:
       # Holds futures representing ongoing accept calls on multiple servers.
       self.acceptFuts = self.servers.mapIt(it.accept())
-
+    echo "> TcpTransport::accept - 0"
     let
       finished =
         try:
           # Waits for any one of these futures to complete, indicating that a new connection has been accepted on one of the servers.
+          echo "###############################################################"
           await one(self.acceptFuts)
         except ValueError:
+          echo "> TcpTransport::accept - 02"
           raiseAssert "Accept futures should not be empty"
         except CancelledError as exc:
+          echo "> TcpTransport::accept - 03"
           cancelAcceptFuts()
           raise exc
       index = self.acceptFuts.find(finished)
 
+    echo "> TcpTransport::accept - 1"
     # A new connection has been accepted. The corresponding server should immediately start accepting another connection.
     # Thus we replace the completed future with a new one by calling accept on the same server again.
     self.acceptFuts[index] = self.servers[index].accept()
@@ -274,6 +279,7 @@ method accept*(self: TcpTransport): Future[Connection] =
         cancelAcceptFuts()
         raise exc
 
+    echo "> TcpTransport::accept - 2"
     if not self.running: # Stopped while waiting
       await transp.closeWait()
       raise newTransportClosedError()
@@ -289,6 +295,7 @@ method accept*(self: TcpTransport): Future[Connection] =
 
     let observedAddr =
       MultiAddress.init(remote).expect("Can initialize from remote address")
+    echo "- TcpTransport::accept"
     self.connHandler(transp, Opt.some(observedAddr), Direction.In)
 
   impl(self)

libp2p/transports/transport.nim

@@ -36,6 +36,9 @@ type
     upgrader*: Upgrade
     networkReachability*: NetworkReachability
 
+method log*(self: Transport): string {.base, gcsafe.} =
+  "<Transport>"
+
 proc newTransportClosedError*(parent: ref Exception = nil): ref TransportError =
   newException(TransportClosedError, "Transport closed, no more connections!", parent)
 
@@ -69,10 +72,10 @@ method dial*(
 ): Future[Connection] {.base, gcsafe.} =
   ## dial a peer
   ##
-
+  echo "Transport::dial"
   doAssert(false, "Not implemented!")
 
-proc dial*(
+method dial*(
     self: Transport, address: MultiAddress, peerId: Opt[PeerId] = Opt.none(PeerId)
 ): Future[Connection] {.gcsafe.} =
   self.dial("", address)
@@ -83,6 +86,7 @@ method upgrade*(
   ## base upgrade method that the transport uses to perform
   ## transport specific upgrades
   ##
+  echo "> Transport::upgrade"
   self.upgrader.upgrade(conn, peerId)
 
 method handles*(self: Transport, address: MultiAddress): bool {.base, gcsafe.} =

libp2p/upgrademngrs/muxedupgrade.nim

@@ -68,6 +68,8 @@ method upgrade*(
 ): Future[Muxer] {.async: (raises: [CancelledError, LPError]).} =
   trace "Upgrading connection", conn, direction = conn.dir
 
+  echo "> MuxedUpgrade::upgrade"
+  echo "-----"
   let sconn = await self.secure(conn, peerId) # secure the connection
   if sconn == nil:
     raise (ref UpgradeFailedError)(msg: "unable to secure connection, stopping upgrade")

libp2p/upgrademngrs/upgrade.nim

@@ -47,9 +47,10 @@ method upgrade*(
 ): Future[Muxer] {.async: (raises: [CancelledError, LPError], raw: true), base.} =
   raiseAssert("Not implemented!")
 
-proc secure*(
+method secure*(
     self: Upgrade, conn: Connection, peerId: Opt[PeerId]
 ): Future[Connection] {.async: (raises: [CancelledError, LPError]).} =
+  echo "> Upgrade::secure"
   if self.secureManagers.len <= 0:
     raise (ref UpgradeFailedError)(msg: "No secure managers registered!")
 
@@ -68,4 +69,5 @@ proc secure*(
   # let's avoid duplicating checks but detect if it fails to do it properly
   doAssert(secureProtocol.len > 0)
 
+  echo "> Upgrade::secure - 0"
   await secureProtocol[0].secure(conn, peerId)