Forgot to include my sending code, incase that's the problem:
void HostInfoService::update() {
QNetworkDatagram datagram(QHostInfo::localHostName().toLocal8Bit(),
QHostAddress::Broadcast, 13999);
udpSocket4.writeDatagram(datagram);
//udpSocket6.writeDatagram(datagram);
qDebug() << Q_FUNC_INFO << QHostInfo::localHostName().toLocal8Bit();
}
> Sent: Tuesday, October 02, 2018 at 9:43 AM
> From: "Jason H" <jh...@gmx.com>
> To: "interestqt-project.org" <interest@qt-project.org>
> Subject: [Interest] Simple device discovery using UDP
>
> I have an app (Desktop) that I want it to know about other running instances
> on the local network. I figured UDP broadcast was a natural choice. I tried
> it, but I never saw anything but my own (local) packets. There's quite a few
> stackoverflow questions, but none used Qt. I'm wondering if it's a
> wifi/router thing?
>
> The hosts are on the same WiFi SSID and address space:
> 10.31.4.26 host1
> 10.31.4.202 host2
>
> Both are on my desk.
> HostInfoService::HostInfoService(...) {
> ...
> udpSocket4.bind(QHostAddress::Any, 13999, QUdpSocket::ShareAddress);
> connect(&udpSocket4, SIGNAL(readyRead()), this,
> SLOT(readPendingDatagrams()));
> ...
> }
>
> void HostInfoService::readPendingDatagrams()
> {
> for (auto udpSocket: {&udpSocket4 } ) { //, &udpSocket6}) {
> while (udpSocket->hasPendingDatagrams()) {
> QNetworkDatagram datagram =
> udpSocket->receiveDatagram();
> QString host = QString(datagram.data().constData());
> messages[host] = datagram.senderAddress();
> qDebug() << Q_FUNC_INFO << host <<
> datagram.senderAddress().toString();
> }
> }
> }
>
> I also tried on an IPv6 socket, no joy.
>
> Has anyone else done something like this?
>
> _______________________________________________
> Interest mailing list
> Interest@qt-project.org
> http://lists.qt-project.org/mailman/listinfo/interest
>
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