QUdpSocket::bind is read-only?
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Following scenario:
there is client and serverserver listens on TCP port for incomming connection
client connects to this TCP port and sends request
server responses to the client with list of opened UDP ports
client connects to the one of UDP port and send request
server gets request on UDP port and response back
The problem is: 5. statement isn't done because then I try to response(write) I always get -1 back, and isWritable method of QUdpSocket returns false...
is UDP socket binds only in read-only mode? So I can't write to it?
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Did you follow the Broadcast "sender":http://qt-project.org/doc/qt-4.8/network-broadcastsender.html and "receiver":http://qt-project.org/doc/qt-4.8/network-broadcastreceiver.html examples?
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Can you show some code?
Using QUdpSocket::bind() only says port and address you will use. So it is possible both to read and write.
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Sht... I have forgot to make "git add" for new files before commiting... I'll come back and show code next week...
But bind function looks like that:
@QUdpSocket * udp_sock = new QUdpSocket(this);
udp_sock->bind(QHostAddress::Any, 2883, QUdpSocket::DontShareAddress|QUdpSocket::ReuseAddressHint/default for unix/);@So nothing extra ordinary... client can connect to this port(over the internet) and this socket gets incoming data(data is packed with QDataStream with set version), I can read request but can't write an answer... write function always returns -1 and isWritable is false...
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koahnig, I'm doing the same thing if you are talking about that:
@while (udpSocket->hasPendingDatagrams()) {
QByteArray datagram;
datagram.resize(udpSocket->pendingDatagramSize());
udpSocket->readDatagram(datagram.data(), datagram.size());
statusLabel->setText(tr("Received datagram: "%1"")
.arg(datagram.data()));
}@
