Low Level API Networking

Hi,

I am trying to develop a car simulator using Unity by playing around with the Roll-a-ball example for exploration. Currently, I am experiencing difficulty sending message to a server end to received a self-defined struct with Unity LLAPIs. I am not able to receive anything from my client. To make things worse, the client will flag "wrong connection" once I start running my server.

For this project, I am using QT for my server while the client end is through Unity.

On the server end (Unity):

         // Initializing the Transport Layer with no arguments (default settings)
         NetworkTransport.Init();
 
         // Configuring
         connectionConfig = new ConnectionConfig();
         reliableChannelId = connectionConfig.AddChannel (QosType.Reliable);
 
         // Topology
         topology = new HostTopology (connectionConfig, 10);
 
         // Socket creation
         socketId = NetworkTransport.AddHost(topology, 10000);
 
         // Connection id creation
         byte error;
         connectionId = NetworkTransport.Connect(socketId, "127.0.0.1", 10001, 0, out error);

On the client side (QT):

 void MainWindow::Start()
 {
     listener = new QUdpSocket(this);
 
     if(listener->bind(QHostAddress::LocalHost, 10000) == true)
     {
         qDebug() << "UDP Connected";
         connect(listener, SIGNAL(readyRead()), this, SLOT(DisplayData()));
     }
     else
     {
         qDebug() << "Error in UDP Connecting";
     }
 }
 
 void MainWindow::DisplayData()
 {
     // when data comes in
     QByteArray buffer;
     buffer.resize(listener->pendingDatagramSize());
 
     QHostAddress sender;
     quint16 senderPort;
 
     if(listener->readDatagram(buffer.data(), buffer.size(), &sender, &senderPort) != -1)
     {
         Pose_t pose;
         pose.deserialize(buffer);
         QString valueAsString = QString::number(pose.d_x);
         ui->textBrowser->setText(valueAsString);
         valueAsString = QString::number(pose.d_y);
         ui->textBrowser_2->setText(valueAsString);
         qDebug() << "data in ";
         //    ui->textBrowser->setText(QTextCodec::codecForMib(106)->toUnicode(buffer));
     }
 }

Thanks.