f9c07da7b6
It's the right thing to do, as we're in 2017, not 1997. Also, this takes care to indicate that QAbstractSocket::MulticastTtlOption makes sense mostly for IPv4, even though it's implemented for both families. In IPv4, it's used to indicatae the scope, whereas in IPv6 it's stored in bits 12-15 of the address. Task-number: QTBUG-46046 Change-Id: I9741f017961b410c910dfffd14ffaabe0a2024d8 Reviewed-by: Mårten Nordheim <marten.nordheim@qt.io> Reviewed-by: Timur Pocheptsov <timur.pocheptsov@qt.io>
110 lines
4.6 KiB
C++
110 lines
4.6 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 <QtWidgets>
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#include <QtNetwork>
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#include "receiver.h"
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Receiver::Receiver(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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statusLabel = new QLabel(tr("Listening for multicast messages on both IPv4 and IPv6"));
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auto quitButton = new QPushButton(tr("&Quit"));
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auto buttonLayout = new QHBoxLayout;
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buttonLayout->addStretch(1);
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buttonLayout->addWidget(quitButton);
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buttonLayout->addStretch(1);
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auto mainLayout = new QVBoxLayout;
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mainLayout->addWidget(statusLabel);
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mainLayout->addLayout(buttonLayout);
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setLayout(mainLayout);
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setWindowTitle(tr("Multicast Receiver"));
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udpSocket4.bind(QHostAddress::AnyIPv4, 45454, QUdpSocket::ShareAddress);
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udpSocket4.joinMulticastGroup(groupAddress4);
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if (!udpSocket6.bind(QHostAddress::AnyIPv6, 45454, QUdpSocket::ShareAddress) ||
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!udpSocket6.joinMulticastGroup(groupAddress6))
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statusLabel->setText(tr("Listening for multicast messages on IPv4 only"));
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connect(&udpSocket4, SIGNAL(readyRead()),
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this, SLOT(processPendingDatagrams()));
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connect(&udpSocket6, &QUdpSocket::readyRead, this, &Receiver::processPendingDatagrams);
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connect(quitButton, SIGNAL(clicked()), this, SLOT(close()));
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}
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void Receiver::processPendingDatagrams()
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{
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QByteArray datagram;
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// using QUdpSocket::readDatagram (API since Qt 4)
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while (udpSocket4.hasPendingDatagrams()) {
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datagram.resize(int(udpSocket4.pendingDatagramSize()));
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udpSocket4.readDatagram(datagram.data(), datagram.size());
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statusLabel->setText(tr("Received IPv4 datagram: \"%1\"")
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.arg(datagram.constData()));
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}
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// using QUdpSocket::receiveDatagram (API since Qt 5.8)
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while (udpSocket6.hasPendingDatagrams()) {
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QNetworkDatagram dgram = udpSocket6.receiveDatagram();
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statusLabel->setText(statusLabel->text() +
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tr("\nReceived IPv6 datagram from [%2]:%3: \"%1\"")
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.arg(dgram.data().constData(), dgram.senderAddress().toString())
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.arg(dgram.senderPort()));
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}
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}
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