QUdpSocket broadcast to multiple processes

[tomschuring]

The broadcastsender and broadcastreceiver example don't seem to work for me.

if i change the bind in the receiver from:

udpSocket->bind(45454, QUdpSocket::ShareAddress);

udpSocket->bind(45454, QUdpSocket::ShareAddress);

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to

QHostAddress myAddress = QHostAddress("127.0.0.1");
udpSocket->bindmyAddress, 45454, QUdpSocket::ShareAddress | QUdpSocket::ReuseAddressHint);

QHostAddress myAddress = QHostAddress("127.0.0.1");
udpSocket->bindmyAddress, 45454, QUdpSocket::ShareAddress | QUdpSocket::ReuseAddressHint);

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and the sender from

udpSocket->writeDatagram(datagram.data(),datagram.size(), QHostAddress::Broadcast, 45454 );

udpSocket->writeDatagram(datagram.data(),datagram.size(), QHostAddress::Broadcast, 45454 );

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to

QHostAddress myAddress = QHostAddress("127.0.0.1");
udpSocket->writeDatagram(datagram.data(),datagram.size(), myAddress, 45454 )

QHostAddress myAddress = QHostAddress("127.0.0.1");
udpSocket->writeDatagram(datagram.data(),datagram.size(), myAddress, 45454 )

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it starts to work.
Before i ask my next question, could anyone shed some light on where i could look why this is the case ? From what i read the example should work as is ?

thanks,
tom

[tomschuring]

found what was the problem.. the firewall was blocking all udp broadcasts.
i figured it out when i temporarily switched off the firewall.

thanks for thinking along all !