close socket on timeout

tcp_nutss.nim

@@ -79,7 +79,7 @@ method initiate*(puncher: TcpNutssPuncher, attempt: Attempt,
   try:
     let acceptFuture = attempt.acceptFuture.get()
     await injectSynPackets(attempt)
-    await progress("")
+    await progress("") # FIXME: await means we wait until the rendezvous server replied
     await acceptFuture or sleepAsync(Timeout)
     if acceptFuture.finished():
       result = acceptFuture.read()

udp.nim

@@ -41,6 +41,7 @@ proc doInitiate(srcIp: IpAddress, srcPort: Port, dstIp: IpAddress,
     await sock.send("ACK")
     initiateFuture.complete(sock)
   else:
+    sock.close()
     echo &"connection {srcIp}:{srcPort.int} -> {dstIp}:{dstPort.int} timed out"
 
 proc doRespond(srcIp: IpAddress, srcPort: Port, dstIp: IpAddress,