/**************************************************************************** ** ** 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 "sender.h" Sender::Sender(QWidget *parent) : QDialog(parent), groupAddress4(QStringLiteral("239.255.43.21")), groupAddress6(QStringLiteral("ff12::2115")) { // force binding to their respective families udpSocket4.bind(QHostAddress(QHostAddress::AnyIPv4), 0); udpSocket6.bind(QHostAddress(QHostAddress::AnyIPv6), udpSocket4.localPort()); QString msg = tr("Ready to multicast datagrams to groups %1 and [%2] on port 45454").arg(groupAddress4.toString()); if (udpSocket6.state() != QAbstractSocket::BoundState) msg = tr("IPv6 failed. Ready to multicast datagrams to group %1 on port 45454").arg(groupAddress4.toString()); else msg = msg.arg(groupAddress6.toString()); statusLabel = new QLabel(msg); auto ttlLabel = new QLabel(tr("TTL for IPv4 multicast datagrams:")); auto ttlSpinBox = new QSpinBox; ttlSpinBox->setRange(0, 255); auto ttlLayout = new QHBoxLayout; ttlLayout->addWidget(ttlLabel); ttlLayout->addWidget(ttlSpinBox); startButton = new QPushButton(tr("&Start")); auto quitButton = new QPushButton(tr("&Quit")); auto buttonBox = new QDialogButtonBox; buttonBox->addButton(startButton, QDialogButtonBox::ActionRole); buttonBox->addButton(quitButton, QDialogButtonBox::RejectRole); connect(ttlSpinBox, QOverload::of(&QSpinBox::valueChanged), this, &Sender::ttlChanged); connect(startButton, &QPushButton::clicked, this, &Sender::startSending); connect(quitButton, &QPushButton::clicked, this, &Sender::close); connect(&timer, &QTimer::timeout, this, &Sender::sendDatagram); auto mainLayout = new QVBoxLayout; mainLayout->addWidget(statusLabel); mainLayout->addLayout(ttlLayout); mainLayout->addWidget(buttonBox); setLayout(mainLayout); setWindowTitle(tr("Multicast Sender")); ttlSpinBox->setValue(1); } void Sender::ttlChanged(int newTtl) { // we only set the TTL on the IPv4 socket, as that changes the multicast scope udpSocket4.setSocketOption(QAbstractSocket::MulticastTtlOption, newTtl); } void Sender::startSending() { startButton->setEnabled(false); timer.start(1000); } void Sender::sendDatagram() { statusLabel->setText(tr("Now sending datagram %1").arg(messageNo)); QByteArray datagram = "Multicast message " + QByteArray::number(messageNo); udpSocket4.writeDatagram(datagram, groupAddress4, 45454); if (udpSocket6.state() == QAbstractSocket::BoundState) udpSocket6.writeDatagram(datagram, groupAddress6, 45454); ++messageNo; }