120 lines
4.9 KiB
C++
120 lines
4.9 KiB
C++
/****************************************************************************
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**
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** Copyright (C) 2017 The Qt Company Ltd.
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** Contact: https://www.qt.io/licensing/
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**
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** This file is part of the examples of the Qt Toolkit.
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**
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** $QT_BEGIN_LICENSE:BSD$
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** Commercial License Usage
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** Licensees holding valid commercial Qt licenses may use this file in
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** accordance with the commercial license agreement provided with the
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** Software or, alternatively, in accordance with the terms contained in
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** a written agreement between you and The Qt Company. For licensing terms
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** and conditions see https://www.qt.io/terms-conditions. For further
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** information use the contact form at https://www.qt.io/contact-us.
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**
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** BSD License Usage
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** Alternatively, you may use this file under the terms of the BSD license
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** as follows:
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**
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** "Redistribution and use in source and binary forms, with or without
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** modification, are permitted provided that the following conditions are
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** met:
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** * Redistributions of source code must retain the above copyright
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** notice, this list of conditions and the following disclaimer.
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** * Redistributions in binary form must reproduce the above copyright
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** notice, this list of conditions and the following disclaimer in
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** the documentation and/or other materials provided with the
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** distribution.
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** * Neither the name of The Qt Company Ltd nor the names of its
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** contributors may be used to endorse or promote products derived
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** from this software without specific prior written permission.
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**
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**
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** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
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**
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** $QT_END_LICENSE$
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**
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****************************************************************************/
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#include "sender.h"
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Sender::Sender(QWidget *parent)
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: QDialog(parent),
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groupAddress4(QStringLiteral("239.255.43.21")),
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groupAddress6(QStringLiteral("ff12::2115"))
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{
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// force binding to their respective families
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udpSocket4.bind(QHostAddress(QHostAddress::AnyIPv4), 0);
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udpSocket6.bind(QHostAddress(QHostAddress::AnyIPv6), udpSocket4.localPort());
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QString msg = tr("Ready to multicast datagrams to groups %1 and [%2] on port 45454").arg(groupAddress4.toString());
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if (udpSocket6.state() != QAbstractSocket::BoundState)
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msg = tr("IPv6 failed. Ready to multicast datagrams to group %1 on port 45454").arg(groupAddress4.toString());
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else
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msg = msg.arg(groupAddress6.toString());
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statusLabel = new QLabel(msg);
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auto ttlLabel = new QLabel(tr("TTL for IPv4 multicast datagrams:"));
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auto ttlSpinBox = new QSpinBox;
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ttlSpinBox->setRange(0, 255);
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auto ttlLayout = new QHBoxLayout;
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ttlLayout->addWidget(ttlLabel);
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ttlLayout->addWidget(ttlSpinBox);
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startButton = new QPushButton(tr("&Start"));
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auto quitButton = new QPushButton(tr("&Quit"));
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auto buttonBox = new QDialogButtonBox;
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buttonBox->addButton(startButton, QDialogButtonBox::ActionRole);
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buttonBox->addButton(quitButton, QDialogButtonBox::RejectRole);
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connect(ttlSpinBox, QOverload<int>::of(&QSpinBox::valueChanged), this, &Sender::ttlChanged);
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connect(startButton, &QPushButton::clicked, this, &Sender::startSending);
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connect(quitButton, &QPushButton::clicked, this, &Sender::close);
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connect(&timer, &QTimer::timeout, this, &Sender::sendDatagram);
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auto mainLayout = new QVBoxLayout;
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mainLayout->addWidget(statusLabel);
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mainLayout->addLayout(ttlLayout);
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mainLayout->addWidget(buttonBox);
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setLayout(mainLayout);
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setWindowTitle(tr("Multicast Sender"));
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ttlSpinBox->setValue(1);
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}
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void Sender::ttlChanged(int newTtl)
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{
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// we only set the TTL on the IPv4 socket, as that changes the multicast scope
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udpSocket4.setSocketOption(QAbstractSocket::MulticastTtlOption, newTtl);
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}
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void Sender::startSending()
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{
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startButton->setEnabled(false);
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timer.start(1000);
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}
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void Sender::sendDatagram()
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{
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statusLabel->setText(tr("Now sending datagram %1").arg(messageNo));
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QByteArray datagram = "Multicast message " + QByteArray::number(messageNo);
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udpSocket4.writeDatagram(datagram, groupAddress4, 45454);
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if (udpSocket6.state() == QAbstractSocket::BoundState)
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udpSocket6.writeDatagram(datagram, groupAddress6, 45454);
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++messageNo;
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}
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