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| |
| #include <QtWidgets> |
| #include <QtNetwork> |
| |
| #include "receiver.h" |
| |
| Receiver::Receiver(QWidget *parent) |
| : QDialog(parent), |
| groupAddress4(QStringLiteral("239.255.43.21")), |
| groupAddress6(QStringLiteral("ff12::2115")) |
| { |
| statusLabel = new QLabel(tr("Listening for multicast messages on both IPv4 and IPv6")); |
| auto quitButton = new QPushButton(tr("&Quit")); |
| |
| auto buttonLayout = new QHBoxLayout; |
| buttonLayout->addStretch(1); |
| buttonLayout->addWidget(quitButton); |
| buttonLayout->addStretch(1); |
| |
| auto mainLayout = new QVBoxLayout; |
| mainLayout->addWidget(statusLabel); |
| mainLayout->addLayout(buttonLayout); |
| setLayout(mainLayout); |
| |
| setWindowTitle(tr("Multicast Receiver")); |
| |
| udpSocket4.bind(QHostAddress::AnyIPv4, 45454, QUdpSocket::ShareAddress); |
| udpSocket4.joinMulticastGroup(groupAddress4); |
| |
| if (!udpSocket6.bind(QHostAddress::AnyIPv6, 45454, QUdpSocket::ShareAddress) || |
| !udpSocket6.joinMulticastGroup(groupAddress6)) |
| statusLabel->setText(tr("Listening for multicast messages on IPv4 only")); |
| |
| connect(&udpSocket4, &QUdpSocket::readyRead, |
| this, &Receiver::processPendingDatagrams); |
| connect(&udpSocket6, &QUdpSocket::readyRead, |
| this, &Receiver::processPendingDatagrams); |
| connect(quitButton, &QPushButton::clicked, |
| this, &Receiver::close); |
| } |
| |
| void Receiver::processPendingDatagrams() |
| { |
| QByteArray datagram; |
| |
| // using QUdpSocket::readDatagram (API since Qt 4) |
| while (udpSocket4.hasPendingDatagrams()) { |
| datagram.resize(int(udpSocket4.pendingDatagramSize())); |
| udpSocket4.readDatagram(datagram.data(), datagram.size()); |
| statusLabel->setText(tr("Received IPv4 datagram: \"%1\"") |
| .arg(datagram.constData())); |
| } |
| |
| // using QUdpSocket::receiveDatagram (API since Qt 5.8) |
| while (udpSocket6.hasPendingDatagrams()) { |
| QNetworkDatagram dgram = udpSocket6.receiveDatagram(); |
| statusLabel->setText(statusLabel->text() + |
| tr("\nReceived IPv6 datagram from [%2]:%3: \"%1\"") |
| .arg(dgram.data().constData(), dgram.senderAddress().toString()) |
| .arg(dgram.senderPort())); |
| } |
| } |