Very strange socket programming problem

[montylee]

please help me. I am thinking of getting the messages in the C code itself and passing each message back to the GUI code.
What is the best possible way of doing this? I need to pass each message received in C code to the GUI so that it gets displayed in the GUI. The C code should keep executing and listening to the socket, as soon as it gets a message it should be sent to the GUI code and the C code should continue listening to the socket.

[bhs-ittech]

just a wild guess, but can your C code send back the socket descriptor to the GUI code, and then let Qt close the socket?

then perhaps you can do something like this:

int sd = C_CodeFunction();
QUdpSocket *udp = new QUdpSocket;
if(udp->setSocketDescriptor(sd))
{
   QObject::connect(udp, SIGNAL(readyRead()), your_obj, SLOT(your_slot()));
}

int sd = C_CodeFunction();
QUdpSocket *udp = new QUdpSocket;
if(udp->setSocketDescriptor(sd))
{
   QObject::connect(udp, SIGNAL(readyRead()), your_obj, SLOT(your_slot()));
}

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or something to that effect.

[montylee]

just a wild guess, but can your C code send back the socket descriptor to the GUI code, and then let Qt close the socket?

then perhaps you can do something like this:

int sd = C_CodeFunction();
QUdpSocket *udp = new QUdpSocket;
if(udp->setSocketDescriptor(sd))
{
   QObject::connect(udp, SIGNAL(readyRead()), your_obj, SLOT(your_slot()));
}

int sd = C_CodeFunction();
QUdpSocket *udp = new QUdpSocket;
if(udp->setSocketDescriptor(sd))
{
   QObject::connect(udp, SIGNAL(readyRead()), your_obj, SLOT(your_slot()));
}

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or something to that effect.

wow!!! it worked I can't believe that your suggestion worked. I just passed the socket descriptor from C code to the Qt code and i am now able to read all messages in the Qt code.

Thanks a lot for replying and helping me in this issue

I still have no idea why i was not able to create a new socket and read the messages earlier.