QUdpSocket not sending data when created in QThread

[vezprog]

In a nutshell, how do you send data when a QUdpSocket is created in a QThread?

Heres my QThread class header:
@
#ifndef UDP_H
#define UDP_H

#include "defines.h"

#include <QThread>
#include <QtNetwork>

class UDP : public QThread
{
Q_OBJECT

public:
explicit UDP(QObject *parent = 0);
void run();
void commandSend();

QUdpSocket *udp_socket;
QByteArray data;
QString host;
QString port;

signals:
void dataReceived(QByteArray);

private slots:
void udpSocketReadyRead();

};

#endif // UDP_H
@

Heres my QThread class cpp:
@
#include "udp.h"

UDP::UDP(QObject *parent) :
QThread(parent)
{
}

/*
// main run loop
/
void UDP::run()
{
/ object connects */
udp_socket = new QUdpSocket();
udp_socket->moveToThread(this);
connect(udp_socket, SIGNAL(readyRead()), this, SLOT(udpSocketReadyRead()));

/* start run loop */
exec();

}

/*
// send (private function)
/
void UDP::commandSend()
{
/ check if the socket is already bound */
if (udp_socket->state() != QUdpSocket::BoundState){
// bind the socket
if (!udp_socket->bind(43680)){
QMessageBox errMsg;
errMsg.setWindowTitle("Error");
errMsg.setText("Error binding socket");
errMsg.exec();
return;
}
}

/* send the initiate packet */
if (udp_socket->writeDatagram(data, QHostAddress(host&#41;, port.toInt(&#41;&#41; < 0&#41;{
    QMessageBox errMsg;
    errMsg.setWindowTitle("UDP Error"&#41;;
    errMsg.setText("Error sending packet"&#41;;
    errMsg.exec(&#41;;
}

}

/*
// udp socket ready read (private slot)
*/
void UDP::udpSocketReadyRead()
{

}
@

Heres how i initialize in my main gui thread:
@
c_thread->host = IP;
c_thread->port = PORT;
...
...
// fill data buffer goes here
...
...
emit commandSend();
@

When I call the "commandSend", it does not send the packet... I have watched it on wire shark.

I know that QThread spawns its own threads to deal with the run loop, but I am having a brain cramp trying to figure out how to successfully get the data sent out the socket. Any ideas?

Thanks in advance.

Edit: I have changed a little bit of the code to "moveToThread" to direct the socket connections to the specific thread. Yet, i am still unable to send data...

[franku]

You probably have to call udp_socket->flush() after queuing data with udp_socket->writeDatagram() since these sockets use buffered I/O (and you do not run the exec() event routine of that socket).

[nibbit]

writeDatagram exits with no errors? And other question, what host ip are you using? If you set host ip the same as local ip you will not see packet in a sniffer. You can check broadcast ip.