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// Copyright (C) 2017 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
#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, &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;
}
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