Fix connection bug when reloading a signal chain

Caused by closing and re-opening the data and listen sockets on the same port number when loading a signal chain.

Source/ZmqInterface.cpp

@@ -207,15 +207,15 @@ void ZmqInterface::openListenSocket()
 int ZmqInterface::closeListenSocket()
 {
  int rc = 0;
-
- LOGD("Closing listening socket");
-
- stopTimer();
-
- stopThread(500);
 
  if (listenSocket)
  {
+ LOGD("Closing listening socket");
+
+ stopTimer();
+
+ stopThread(500);
+
  rc = zmq_close(listenSocket);
  listenSocket = nullptr;
  }
@@ -783,13 +783,18 @@ void ZmqInterface::parameterValueChanged(Parameter* param)
  }
  else if (param->getName().equalsIgnoreCase("data_port"))
  {
- // close previous sockets and assign new ports
+ int newDataPort = static_cast<IntParameter*>(param)->getIntValue();
 
- closeListenSocket();
- closeDataSocket();
- dataPort = static_cast<IntParameter*>(param)->getIntValue();
- listenPort = dataPort + 1;
- openListenSocket();
- openDataSocket();
+ if(dataPort != newDataPort)
+ {
+ // close previous sockets and assign new ports
+
+ closeListenSocket();
+ closeDataSocket();
+ dataPort = newDataPort;
+ listenPort = dataPort + 1;
+ openListenSocket();
+ openDataSocket();
+ }
  }
 }