Add multicastsender and multicastreceiver examples

These are clones of the broadcastsender and broadcastreceiver examples,
modified to use the multicast API. I've made sure that the examples are linked
in the appropriate places as well.

14 files changed, 535 insertions, 6 deletions

diff --git a/doc/src/examples/multicastreceiver.qdoc b/doc/src/examples/multicastreceiver.qdoc
new file mode 100644
index 0000000000..f7697056ff
--- /dev/null
+++ b/doc/src/examples/multicastreceiver.qdoc
@@ -0,0 +1,36 @@
+/****************************************************************************
+**
+** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
+** All rights reserved.
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** This file is part of the documentation of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:FDL$
+** Commercial Usage
+** Licensees holding valid Qt Commercial licenses may use this file in
+** accordance with the Qt Commercial License Agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in a
+** written agreement between you and Nokia.
+**
+** GNU Free Documentation License
+** Alternatively, this file may be used under the terms of the GNU Free
+** Documentation License version 1.3 as published by the Free Software
+** Foundation and appearing in the file included in the packaging of this
+** file.
+**
+** If you have questions regarding the use of this file, please contact
+** Nokia at qt-info@nokia.com.
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+/*!
+    \example network/multicastreceiver
+    \title Multicast Receiver Example
+
+    The Multicast Receiever example shows how to receive information that is
+    sent to a multicast group.
+
+    \image multicastreceiver-example.png
+*/
diff --git a/doc/src/examples/multicastsender.qdoc b/doc/src/examples/multicastsender.qdoc
new file mode 100644
index 0000000000..271be604f8
--- /dev/null
+++ b/doc/src/examples/multicastsender.qdoc
@@ -0,0 +1,36 @@
+/****************************************************************************
+**
+** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
+** All rights reserved.
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** This file is part of the documentation of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:FDL$
+** Commercial Usage
+** Licensees holding valid Qt Commercial licenses may use this file in
+** accordance with the Qt Commercial License Agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in a
+** written agreement between you and Nokia.
+**
+** GNU Free Documentation License
+** Alternatively, this file may be used under the terms of the GNU Free
+** Documentation License version 1.3 as published by the Free Software
+** Foundation and appearing in the file included in the packaging of this
+** file.
+**
+** If you have questions regarding the use of this file, please contact
+** Nokia at qt-info@nokia.com.
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+/*!
+    \example network/multicastsender
+    \title Multicast Sender Example
+
+    The Multicast Sender example shows how to send information to multiple
+    clients in a multicast group.
+
+    \image multicastsender-example.png
+*/
diff --git a/doc/src/getting-started/examples.qdoc b/doc/src/getting-started/examples.qdoc
index e8c85e6139..f849bf0582 100644
--- a/doc/src/getting-started/examples.qdoc
+++ b/doc/src/getting-started/examples.qdoc
@@ -473,6 +473,8 @@
     \o  \l{network/bearercloud}{Bearer Cloud}\raisedaster
     \o  \l{network/bearermonitor}{Bearer Monitor}
     \o  \l{network/securesocketclient}{Secure Socket Client}
+    \o  \l{network/multicastreceiver}{Multicast Receiver}
+    \o  \l{network/multicastsender}{Multicast Sender}
     \endlist
 
     Examples marked with an asterisk (*) are fully documented.
diff --git a/doc/src/network-programming/qtnetwork.qdoc b/doc/src/network-programming/qtnetwork.qdoc
index dcee1b8365..fce12a7d9f 100644
--- a/doc/src/network-programming/qtnetwork.qdoc
+++ b/doc/src/network-programming/qtnetwork.qdoc
@@ -257,8 +257,13 @@
     QUdpSocket::readDatagram() to read the datagram.
 
     The \l{network/broadcastsender}{Broadcast Sender} and
-    \l{network/broadcastreceiver}{Broadcast Receiver} examples show
-    how to write a UDP sender and a UDP receiver using Qt.
+    \l{network/broadcastreceiver}{Broadcast Receiver} examples show how to
+    write a UDP sender and a UDP receiver using Qt.
+
+    QUdpSocket also supports multicasting. The
+    \l{network/multicastsender}{Multicast Sender} and
+    \l{network/multicastreceiver}{Multicast Receiver} examples show how to use
+    write UDP multicast clients.
 
     \section1 Resolving Host Names using QHostInfo
 
diff --git a/examples/network/multicastreceiver/main.cpp b/examples/network/multicastreceiver/main.cpp
new file mode 100644
index 0000000000..8483271ad2
--- /dev/null
+++ b/examples/network/multicastreceiver/main.cpp
@@ -0,0 +1,51 @@
+/****************************************************************************
+**
+** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
+** All rights reserved.
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** This file is part of the examples of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:BSD$
+** 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 Nokia Corporation and its Subsidiary(-ies) 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 <QApplication>
+
+#include "receiver.h"
+
+int main(int argc, char *argv[])
+{
+    QApplication app(argc, argv);
+    Receiver receiver;
+    receiver.show();
+    return receiver.exec();
+}
diff --git a/examples/network/multicastreceiver/multicastreceiver.pro b/examples/network/multicastreceiver/multicastreceiver.pro
new file mode 100644
index 0000000000..400c92e49c
--- /dev/null
+++ b/examples/network/multicastreceiver/multicastreceiver.pro
@@ -0,0 +1,12 @@
+HEADERS       = receiver.h
+SOURCES       = receiver.cpp \
+                main.cpp
+QT           += network
+
+# install
+target.path = $$[QT_INSTALL_EXAMPLES]/network/multicastreceiver
+sources.files = $$SOURCES $$HEADERS $$RESOURCES $$FORMS multicastreceiver.pro
+sources.path = $$[QT_INSTALL_EXAMPLES]/network/multicastreceiver
+INSTALLS += target sources
+
+symbian: include($$QT_SOURCE_TREE/examples/symbianpkgrules.pri)
diff --git a/examples/network/multicastreceiver/receiver.cpp b/examples/network/multicastreceiver/receiver.cpp
new file mode 100644
index 0000000000..073fdce041
--- /dev/null
+++ b/examples/network/multicastreceiver/receiver.cpp
@@ -0,0 +1,84 @@
+/****************************************************************************
+**
+** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
+** All rights reserved.
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** This file is part of the examples of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:BSD$
+** 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 Nokia Corporation and its Subsidiary(-ies) 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 <QtGui>
+#include <QtNetwork>
+
+#include "receiver.h"
+
+Receiver::Receiver(QWidget *parent)
+    : QDialog(parent)
+{
+    groupAddress = QHostAddress("239.255.43.21");
+
+    statusLabel = new QLabel(tr("Listening for multicasted messages"));
+    quitButton = new QPushButton(tr("&Quit"));
+
+    udpSocket = new QUdpSocket(this);
+    udpSocket->bind(45454, QUdpSocket::ShareAddress);
+    udpSocket->joinMulticastGroup(groupAddress);
+
+    connect(udpSocket, SIGNAL(readyRead()),
+            this, SLOT(processPendingDatagrams()));
+    connect(quitButton, SIGNAL(clicked()), this, SLOT(close()));
+
+    QHBoxLayout *buttonLayout = new QHBoxLayout;
+    buttonLayout->addStretch(1);
+    buttonLayout->addWidget(quitButton);
+    buttonLayout->addStretch(1);
+
+    QVBoxLayout *mainLayout = new QVBoxLayout;
+    mainLayout->addWidget(statusLabel);
+    mainLayout->addLayout(buttonLayout);
+    setLayout(mainLayout);
+
+    setWindowTitle(tr("Multicast Receiver"));
+}
+
+void Receiver::processPendingDatagrams()
+{
+    while (udpSocket->hasPendingDatagrams()) {
+        QByteArray datagram;
+        datagram.resize(udpSocket->pendingDatagramSize());
+        udpSocket->readDatagram(datagram.data(), datagram.size());
+        statusLabel->setText(tr("Received datagram: \"%1\"")
+                             .arg(datagram.data()));
+    }
+}
diff --git a/examples/network/multicastreceiver/receiver.h b/examples/network/multicastreceiver/receiver.h
new file mode 100644
index 0000000000..e22602868e
--- /dev/null
+++ b/examples/network/multicastreceiver/receiver.h
@@ -0,0 +1,70 @@
+/****************************************************************************
+**
+** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
+** All rights reserved.
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** This file is part of the examples of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:BSD$
+** 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 Nokia Corporation and its Subsidiary(-ies) 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$
+**
+****************************************************************************/
+
+#ifndef RECEIVER_H
+#define RECEIVER_H
+
+#include <QDialog>
+#include <QHostAddress>
+
+QT_BEGIN_NAMESPACE
+class QLabel;
+class QPushButton;
+class QUdpSocket;
+QT_END_NAMESPACE
+
+class Receiver : public QDialog
+{
+    Q_OBJECT
+
+public:
+    Receiver(QWidget *parent = 0);
+
+private slots:
+    void processPendingDatagrams();
+
+private:
+    QLabel *statusLabel;
+    QPushButton *quitButton;
+    QUdpSocket *udpSocket;
+    QHostAddress groupAddress;
+};
+
+#endif
diff --git a/examples/network/multicastsender/main.cpp b/examples/network/multicastsender/main.cpp
new file mode 100644
index 0000000000..93093226a2
--- /dev/null
+++ b/examples/network/multicastsender/main.cpp
@@ -0,0 +1,51 @@
+/****************************************************************************
+**
+** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
+** All rights reserved.
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** This file is part of the examples of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:BSD$
+** 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 Nokia Corporation and its Subsidiary(-ies) 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 <QApplication>
+
+#include "sender.h"
+
+int main(int argc, char *argv[])
+{
+    QApplication app(argc, argv);
+    Sender sender;
+    sender.show();
+    return sender.exec();
+}
diff --git a/examples/network/multicastsender/multicastsender.pro b/examples/network/multicastsender/multicastsender.pro
new file mode 100644
index 0000000000..7543f007c3
--- /dev/null
+++ b/examples/network/multicastsender/multicastsender.pro
@@ -0,0 +1,12 @@
+HEADERS       = sender.h
+SOURCES       = sender.cpp \
+                main.cpp
+QT           += network
+
+# install
+target.path = $$[QT_INSTALL_EXAMPLES]/network/multicastsender
+sources.files = $$SOURCES $$HEADERS $$RESOURCES $$FORMS multicastsender.pro
+sources.path = $$[QT_INSTALL_EXAMPLES]/network/multicastsender
+INSTALLS += target sources
+
+symbian: include($$QT_SOURCE_TREE/examples/symbianpkgrules.pri)
diff --git a/examples/network/multicastsender/sender.cpp b/examples/network/multicastsender/sender.cpp
new file mode 100644
index 0000000000..38d532ccfb
--- /dev/null
+++ b/examples/network/multicastsender/sender.cpp
@@ -0,0 +1,89 @@
+/****************************************************************************
+**
+** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
+** All rights reserved.
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** This file is part of the examples of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:BSD$
+** 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 Nokia Corporation and its Subsidiary(-ies) 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 <QtGui>
+#include <QtNetwork>
+
+#include "sender.h"
+
+Sender::Sender(QWidget *parent)
+    : QDialog(parent)
+{
+    groupAddress = QHostAddress("239.255.43.21");
+
+    statusLabel = new QLabel(tr("Ready to send datagrams to multicast group %1 on port 45454").arg(groupAddress.toString()));
+
+    startButton = new QPushButton(tr("&Start"));
+    quitButton = new QPushButton(tr("&Quit"));
+
+    buttonBox = new QDialogButtonBox;
+    buttonBox->addButton(startButton, QDialogButtonBox::ActionRole);
+    buttonBox->addButton(quitButton, QDialogButtonBox::RejectRole);
+
+    timer = new QTimer(this);
+    udpSocket = new QUdpSocket(this);
+    messageNo = 1;
+
+    connect(startButton, SIGNAL(clicked()), this, SLOT(startSending()));
+    connect(quitButton, SIGNAL(clicked()), this, SLOT(close()));
+    connect(timer, SIGNAL(timeout()), this, SLOT(sendDatagram()));
+
+    QVBoxLayout *mainLayout = new QVBoxLayout;
+    mainLayout->addWidget(statusLabel);
+    mainLayout->addWidget(buttonBox);
+    setLayout(mainLayout);
+
+    setWindowTitle(tr("Multicast Sender"));
+}
+
+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);
+    udpSocket->writeDatagram(datagram.data(), datagram.size(),
+                             groupAddress, 45454);
+    ++messageNo;
+}
diff --git a/examples/network/multicastsender/sender.h b/examples/network/multicastsender/sender.h
new file mode 100644
index 0000000000..176830bada
--- /dev/null
+++ b/examples/network/multicastsender/sender.h
@@ -0,0 +1,77 @@
+/****************************************************************************
+**
+** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
+** All rights reserved.
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** This file is part of the examples of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:BSD$
+** 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 Nokia Corporation and its Subsidiary(-ies) 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."
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef SENDER_H
+#define SENDER_H
+
+#include <QDialog>
+#include <QHostAddress>
+
+QT_BEGIN_NAMESPACE
+class QDialogButtonBox;
+class QLabel;
+class QPushButton;
+class QTimer;
+class QUdpSocket;
+QT_END_NAMESPACE
+
+class Sender : public QDialog
+{
+    Q_OBJECT
+
+public:
+    Sender(QWidget *parent = 0);
+
+private slots:
+    void startSending();
+    void sendDatagram();
+
+private:
+    QLabel *statusLabel;
+    QPushButton *startButton;
+    QPushButton *quitButton;
+    QDialogButtonBox *buttonBox;
+    QUdpSocket *udpSocket;
+    QTimer *timer;
+    QHostAddress groupAddress;
+    int messageNo;
+};
+
+#endif
diff --git a/examples/network/network.pro b/examples/network/network.pro
index 458561a55c..0012a978b3 100644
--- a/examples/network/network.pro
+++ b/examples/network/network.pro
@@ -16,7 +16,9 @@ SUBDIRS       = \
                 threadedfortuneserver \
                 googlesuggest \
                 torrent \
-                bearermonitor
+                bearermonitor \
+                multicastreceiver \
+                multicastsender
 
     contains(QT_CONFIG, svg) {
         SUBDIRS += bearercloud
diff --git a/src/network/socket/qudpsocket.cpp b/src/network/socket/qudpsocket.cpp
index 1ff62cc6b2..dffb5df322 100644
--- a/src/network/socket/qudpsocket.cpp
+++ b/src/network/socket/qudpsocket.cpp
@@ -88,9 +88,11 @@
     to exchange datagrams without specifying the receiver for each
     datagram.
 
-    The \l{network/broadcastsender}{Broadcast Sender} and
-    \l{network/broadcastreceiver}{Broadcast Receiver} examples
-    illustrate how to use QUdpSocket in applications.
+    The \l{network/broadcastsender}{Broadcast Sender},
+    \l{network/broadcastreceiver}{Broadcast Receiver},
+    \l{network/multicastsender}{Multicast Sender}, and
+    \l{network/multicastreceiver}{Multicast Receiver} examples illustrate how
+    to use QUdpSocket in applications.
 
     \section1 Symbian Platform Security Requirements