UDP Network. receiving pakets

[muhuhn]

Thanks for your response.
Is it possible to mix bind() and connectToHost()? As i understood either the one or the other should be used. Where is the bind() missing? i also tryed solutions only with bind() and the writeDatagram() functions. the result was the same: receiving a paket didn't work.

[anda_skoa]

bind() is needed if you want your UDP socket to listen for data.

connectToHost() is just a convenience for not having to specifiy the receiver when sending packets. I doubt it would conflict with bind().

"Connect" doesn't have any inherent meaning for UDP, the function is in QUdpSocket because it is in its base class and the developers decided to make it do something useful (allowing to you use write without specifying the receipient) instead of it just doing nothing (or generating an error),

Cheers,
_

[muhuhn]

OK, i think i got this. How can i bind a socket to the port that is used as a source port for transmitting? The transmitter picks its source port randomly, thats fine so far. But how do i tell the socket that it has to listen to that randomly choosen port? It would not be a Problem if the Server response would go to a defined port at client side. But i have to listen to a port that i actually don't know when calling bind().

Thanks for your help.

[anda_skoa]

Just to be sure: have you checked if binding to a port makes this also the port used for sending?

If not, you could try connectToHost() and then accessing localPort() for the value to bind()

Cheers,
_