QT Receive Interface

    QString discoveryMessage = "1234567890";

    QByteArray Data = QByteArray::fromHex(discoveryMessage.toLatin1());

    discoveryUdpSocket = new QUdpSocket(this);

    discoveryUdpSocket->bind(QHostAddress::Any, QUdpSocket::ShareAddress |     QUdpSocket::ReuseAddressHint);

    connect(discoveryUdpSocket, SIGNAL(readyRead()), this, SLOT(read_discover_datagram()));

    /* Update Network Adresses */

    foreach (QNetworkInterface interface, QNetworkInterface::allInterfaces()) {

        foreach( QNetworkAddressEntry entry, interface.addressEntries() ) {

            QHostAddress broadcastAddress = entry.broadcast();

            if (broadcastAddress != QHostAddress::Null && entry.ip() != QHostAddress::LocalHost) 

{

                    discoveryUdpSocket->writeDatagram(Data, broadcastAddress, 4321 );

            }

        }

    }

void TestClass::read_discover_datagram()

{

    while (discoveryUdpSocket->hasPendingDatagrams()) {

        QHostAddress sender;

        quint16 senderPort;

        QByteArray buffer;

        buffer.resize(discoveryUdpSocket->pendingDatagramSize());

        discoveryUdpSocket->readDatagram(buffer.data(), buffer.size(), &sender, &senderPort);

...