/**************************************************************************** ** ** Copyright (C) 2017 The Qt Company Ltd. ** Contact: https://www.qt.io/licensing/ ** ** This file is part of the examples of the Qt Toolkit. ** ** $QT_BEGIN_LICENSE:BSD$ ** Commercial License Usage ** Licensees holding valid commercial Qt licenses may use this file in ** accordance with the commercial license agreement provided with the ** Software or, alternatively, in accordance with the terms contained in ** a written agreement between you and The Qt Company. For licensing terms ** and conditions see https://www.qt.io/terms-conditions. For further ** information use the contact form at https://www.qt.io/contact-us. ** ** BSD License Usage ** Alternatively, you may use this file under the terms of the BSD license ** as follows: ** ** "Redistribution and use in source and binary forms, with or without ** modification, are permitted provided that the following conditions are ** met: ** * Redistributions of source code must retain the above copyright ** notice, this list of conditions and the following disclaimer. ** * Redistributions in binary form must reproduce the above copyright ** notice, this list of conditions and the following disclaimer in ** the documentation and/or other materials provided with the ** distribution. ** * Neither the name of The Qt Company Ltd nor the names of its ** contributors may be used to endorse or promote products derived ** from this software without specific prior written permission. ** ** ** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS ** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT ** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR ** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT ** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, ** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT ** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, ** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY ** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT ** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE ** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE." ** ** $QT_END_LICENSE$ ** ****************************************************************************/ #include #include #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, SIGNAL(readyRead()), this, SLOT(processPendingDatagrams())); connect(&udpSocket6, &QUdpSocket::readyRead, this, &Receiver::processPendingDatagrams); connect(quitButton, SIGNAL(clicked()), this, SLOT(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())); } }