Introduce SCTP sockets support

Add protocol-specific code and the QSctpServer, QSctpSocket classes.

Change-Id: Ie9a1d87bd1fda866a2405043d1c15c12ded5a96e
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>

12 files changed, 761 insertions, 0 deletions

diff --git a/examples/network/multistreamserver/animation.gif b/examples/network/multistreamserver/animation.gif
new file mode 100644
index 0000000000..f674369efc
--- /dev/null
+++ b/examples/network/multistreamserver/animation.gif
diff --git a/examples/network/multistreamserver/chatprovider.cpp b/examples/network/multistreamserver/chatprovider.cpp
new file mode 100644
index 0000000000..9a88d491ab
--- /dev/null
+++ b/examples/network/multistreamserver/chatprovider.cpp
@@ -0,0 +1,67 @@
+/****************************************************************************
+**
+** Copyright (C) 2016 Alex Trotsenko <alex1973tr@gmail.com>
+** Contact: http://www.qt.io/licensing/
+**
+** 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 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 "chatprovider.h"
+#include <QString>
+#include <QSctpSocket>
+#include <QHostAddress>
+
+ChatProvider::ChatProvider(QObject *parent)
+    : Provider(parent)
+{
+}
+
+void ChatProvider::readDatagram(QSctpSocket &from, const QByteArray &ba)
+{
+    emit writeDatagram(0, QString(QLatin1String("<%1:%2> %3"))
+                      .arg(from.peerAddress().toString())
+                      .arg(QString::number(from.peerPort()))
+                      .arg(QString::fromUtf8(ba)).toUtf8());
+}
+
+void ChatProvider::newConnection(QSctpSocket &client)
+{
+    readDatagram(client, QString(tr("has joined")).toUtf8());
+}
+
+void ChatProvider::clientDisconnected(QSctpSocket &client)
+{
+    readDatagram(client, QString(tr("has left")).toUtf8());
+}
diff --git a/examples/network/multistreamserver/chatprovider.h b/examples/network/multistreamserver/chatprovider.h
new file mode 100644
index 0000000000..912101ec34
--- /dev/null
+++ b/examples/network/multistreamserver/chatprovider.h
@@ -0,0 +1,57 @@
+/****************************************************************************
+**
+** Copyright (C) 2016 Alex Trotsenko <alex1973tr@gmail.com>
+** Contact: http://www.qt.io/licensing/
+**
+** 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 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."
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef CHATPROVIDER_H
+#define CHATPROVIDER_H
+
+#include "provider.h"
+
+class ChatProvider : public Provider
+{
+    Q_OBJECT
+public:
+    explicit ChatProvider(QObject *parent = nullptr);
+
+    void readDatagram(QSctpSocket &from, const QByteArray &ba) Q_DECL_OVERRIDE;
+    void newConnection(QSctpSocket &client) Q_DECL_OVERRIDE;
+    void clientDisconnected(QSctpSocket &client) Q_DECL_OVERRIDE;
+};
+
+#endif
diff --git a/examples/network/multistreamserver/main.cpp b/examples/network/multistreamserver/main.cpp
new file mode 100644
index 0000000000..04350cd13d
--- /dev/null
+++ b/examples/network/multistreamserver/main.cpp
@@ -0,0 +1,51 @@
+/****************************************************************************
+**
+** Copyright (C) 2016 Alex Trotsenko <alex1973tr@gmail.com>
+** Contact: http://www.qt.io/licensing/
+**
+** 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 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 <QApplication>
+
+#include "server.h"
+
+int main(int argc, char *argv[])
+{
+    QApplication app(argc, argv);
+    Server server;
+
+    return (server.exec() == QDialog::Accepted) ? 0 : -1;
+}
diff --git a/examples/network/multistreamserver/movieprovider.cpp b/examples/network/multistreamserver/movieprovider.cpp
new file mode 100644
index 0000000000..cc534e6f40
--- /dev/null
+++ b/examples/network/multistreamserver/movieprovider.cpp
@@ -0,0 +1,63 @@
+/****************************************************************************
+**
+** Copyright (C) 2016 Alex Trotsenko <alex1973tr@gmail.com>
+** Contact: http://www.qt.io/licensing/
+**
+** 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 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 "movieprovider.h"
+#include <QMovie>
+#include <QString>
+#include <QDataStream>
+
+MovieProvider::MovieProvider(QObject *parent)
+    : Provider(parent)
+{
+    movie = new QMovie(this);
+    movie->setCacheMode(QMovie::CacheAll);
+    movie->setFileName(QLatin1String("animation.gif"));
+    connect(movie, &QMovie::frameChanged, this, &MovieProvider::frameChanged);
+    movie->start();
+}
+
+void MovieProvider::frameChanged()
+{
+    QByteArray buf;
+    QDataStream ds(&buf, QIODevice::WriteOnly);
+
+    ds << movie->currentImage();
+    emit writeDatagram(0, buf);
+}
diff --git a/examples/network/multistreamserver/movieprovider.h b/examples/network/multistreamserver/movieprovider.h
new file mode 100644
index 0000000000..d6d8fb7449
--- /dev/null
+++ b/examples/network/multistreamserver/movieprovider.h
@@ -0,0 +1,63 @@
+/****************************************************************************
+**
+** Copyright (C) 2016 Alex Trotsenko <alex1973tr@gmail.com>
+** Contact: http://www.qt.io/licensing/
+**
+** 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 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."
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef MOVIEPROVIDER_H
+#define MOVIEPROVIDER_H
+
+#include "provider.h"
+
+QT_BEGIN_NAMESPACE
+class QMovie;
+QT_END_NAMESPACE
+
+class MovieProvider : public Provider
+{
+    Q_OBJECT
+public:
+    explicit MovieProvider(QObject *parent = nullptr);
+
+private slots:
+    void frameChanged();
+
+private:
+    QMovie *movie;
+};
+
+#endif
diff --git a/examples/network/multistreamserver/multistreamserver.pro b/examples/network/multistreamserver/multistreamserver.pro
new file mode 100644
index 0000000000..75a7e6bbec
--- /dev/null
+++ b/examples/network/multistreamserver/multistreamserver.pro
@@ -0,0 +1,24 @@
+QT += network widgets
+
+HEADERS       = server.h \
+                provider.h \
+                movieprovider.h \
+                timeprovider.h \
+                chatprovider.h
+SOURCES       = server.cpp \
+                movieprovider.cpp \
+                timeprovider.cpp \
+                chatprovider.cpp \
+                main.cpp
+
+EXAMPLE_FILES = animation.gif
+
+# install
+target.path = $$[QT_INSTALL_EXAMPLES]/network/multistreamserver
+INSTALLS += target
+
+wince*: {
+   addFiles.files += *.gif
+   addFiles.path = .
+   DEPLOYMENT += addFiles
+}
diff --git a/examples/network/multistreamserver/provider.h b/examples/network/multistreamserver/provider.h
new file mode 100644
index 0000000000..c6ec612275
--- /dev/null
+++ b/examples/network/multistreamserver/provider.h
@@ -0,0 +1,66 @@
+/****************************************************************************
+**
+** Copyright (C) 2016 Alex Trotsenko <alex1973tr@gmail.com>
+** Contact: http://www.qt.io/licensing/
+**
+** 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 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."
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef PROVIDER_H
+#define PROVIDER_H
+
+#include <QObject>
+
+QT_BEGIN_NAMESPACE
+class QSctpSocket;
+class QByteArray;
+QT_END_NAMESPACE
+
+class Provider : public QObject
+{
+    Q_OBJECT
+
+public:
+    explicit inline Provider(QObject *parent = nullptr) : QObject(parent) { }
+
+    virtual void readDatagram(QSctpSocket &, const QByteArray &) { }
+    virtual void newConnection(QSctpSocket &) { }
+    virtual void clientDisconnected(QSctpSocket &) { }
+
+signals:
+    void writeDatagram(QSctpSocket *to, const QByteArray &ba);
+};
+
+#endif
diff --git a/examples/network/multistreamserver/server.cpp b/examples/network/multistreamserver/server.cpp
new file mode 100644
index 0000000000..1fb18e80b9
--- /dev/null
+++ b/examples/network/multistreamserver/server.cpp
@@ -0,0 +1,159 @@
+/****************************************************************************
+**
+** Copyright (C) 2015 Alex Trotsenko <alex1973tr@gmail.com>
+** Contact: http://www.qt.io/licensing/
+**
+** 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 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 <QtWidgets>
+#include <QtNetwork>
+#include <QtAlgorithms>
+
+#include "server.h"
+#include "movieprovider.h"
+#include "timeprovider.h"
+#include "chatprovider.h"
+
+Server::Server(QWidget *parent)
+    : QDialog(parent)
+    , providers(NumberOfChannels)
+{
+    setWindowTitle(tr("Multi-stream Server"));
+
+    sctpServer = new QSctpServer(this);
+    sctpServer->setMaxChannelCount(NumberOfChannels);
+
+    statusLabel = new QLabel;
+    QPushButton *quitButton = new QPushButton(tr("Quit"));
+
+    providers[Movie] = new MovieProvider(this);
+    providers[Time] = new TimeProvider(this);
+    providers[Chat] = new ChatProvider(this);
+
+    connect(sctpServer, &QSctpServer::newConnection, this, &Server::newConnection);
+    connect(quitButton, &QPushButton::clicked, this, &Server::accept);
+    connect(providers[Movie], &Provider::writeDatagram, this, &Server::writeDatagram);
+    connect(providers[Time], &Provider::writeDatagram, this, &Server::writeDatagram);
+    connect(providers[Chat], &Provider::writeDatagram, this, &Server::writeDatagram);
+
+    QVBoxLayout *mainLayout = new QVBoxLayout;
+    mainLayout->addWidget(statusLabel);
+    mainLayout->addWidget(quitButton);
+    setLayout(mainLayout);
+}
+
+Server::~Server()
+{
+    qDeleteAll(connections.begin(), connections.end());
+}
+
+int Server::exec()
+{
+    if (!sctpServer->listen()) {
+        QMessageBox::critical(this, windowTitle(),
+                              tr("Unable to start the server: %1.")
+                              .arg(sctpServer->errorString()));
+        return QDialog::Rejected;
+    }
+
+    QString ipAddress;
+    QList<QHostAddress> ipAddressesList = QNetworkInterface::allAddresses();
+    // use the first non-localhost IPv4 address
+    for (int i = 0; i < ipAddressesList.size(); ++i) {
+        if (ipAddressesList.at(i) != QHostAddress::LocalHost &&
+            ipAddressesList.at(i).toIPv4Address()) {
+            ipAddress = ipAddressesList.at(i).toString();
+            break;
+        }
+    }
+    // if we did not find one, use IPv4 localhost
+    if (ipAddress.isEmpty())
+        ipAddress = QHostAddress(QHostAddress::LocalHost).toString();
+    statusLabel->setText(tr("The server is running on\n\nIP: %1\nport: %2\n\n"
+                            "Run the Multi-stream Client example now.")
+                         .arg(ipAddress).arg(sctpServer->serverPort()));
+
+    return QDialog::exec();
+}
+
+void Server::newConnection()
+{
+    QSctpSocket *connection = sctpServer->nextPendingDatagramConnection();
+
+    connections.append(connection);
+    connect(connection, &QSctpSocket::channelReadyRead, this, &Server::readDatagram);
+    connect(connection, &QSctpSocket::disconnected, this, &Server::clientDisconnected);
+
+    for (Provider *provider : providers)
+        provider->newConnection(*connection);
+}
+
+void Server::clientDisconnected()
+{
+    QSctpSocket *connection = static_cast<QSctpSocket *>(sender());
+
+    connections.removeOne(connection);
+    connection->disconnect();
+
+    for (Provider *provider : providers)
+        provider->clientDisconnected(*connection);
+
+    connection->deleteLater();
+}
+
+void Server::readDatagram(int channel)
+{
+    QSctpSocket *connection = static_cast<QSctpSocket *>(sender());
+
+    connection->setCurrentReadChannel(channel);
+    providers[channel]->readDatagram(*connection, connection->readDatagram().data());
+}
+
+void Server::writeDatagram(QSctpSocket *to, const QByteArray &ba)
+{
+    int channel = providers.indexOf(static_cast<Provider *>(sender()));
+
+    if (to) {
+        to->setCurrentWriteChannel(channel);
+        to->writeDatagram(ba);
+        return;
+    }
+
+    for (QSctpSocket *connection : connections) {
+        connection->setCurrentWriteChannel(channel);
+        connection->writeDatagram(ba);
+    }
+}
diff --git a/examples/network/multistreamserver/server.h b/examples/network/multistreamserver/server.h
new file mode 100644
index 0000000000..6d01f7a238
--- /dev/null
+++ b/examples/network/multistreamserver/server.h
@@ -0,0 +1,89 @@
+/****************************************************************************
+**
+** Copyright (C) 2016 Alex Trotsenko <alex1973tr@gmail.com>
+** Contact: http://www.qt.io/licensing/
+**
+** 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 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."
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef SERVER_H
+#define SERVER_H
+
+#include <QDialog>
+#include <QVector>
+#include <QList>
+
+QT_BEGIN_NAMESPACE
+class QSctpServer;
+class QSctpSocket;
+class QLabel;
+class QByteArray;
+QT_END_NAMESPACE
+
+class Provider;
+
+class Server : public QDialog
+{
+    Q_OBJECT
+public:
+    explicit Server(QWidget *parent = nullptr);
+    virtual ~Server();
+
+public slots:
+    int exec() Q_DECL_OVERRIDE;
+
+private slots:
+    void newConnection();
+    void clientDisconnected();
+    void readDatagram(int channel);
+    void writeDatagram(QSctpSocket *to, const QByteArray &ba);
+
+private:
+    enum ChannelNumber {
+        Movie = 0,
+        Time = 1,
+        Chat = 2,
+
+        NumberOfChannels = 3
+    };
+
+    QVector<Provider *> providers;
+    QSctpServer *sctpServer;
+    QList<QSctpSocket *> connections;
+
+    QLabel *statusLabel;
+};
+
+#endif
diff --git a/examples/network/multistreamserver/timeprovider.cpp b/examples/network/multistreamserver/timeprovider.cpp
new file mode 100644
index 0000000000..043810cdf3
--- /dev/null
+++ b/examples/network/multistreamserver/timeprovider.cpp
@@ -0,0 +1,67 @@
+/****************************************************************************
+**
+** Copyright (C) 2016 Alex Trotsenko <alex1973tr@gmail.com>
+** Contact: http://www.qt.io/licensing/
+**
+** 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 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 "timeprovider.h"
+#include <QDataStream>
+#include <QTime>
+#include <QByteArray>
+
+TimeProvider::TimeProvider(QObject *parent)
+    : Provider(parent)
+{
+}
+
+void TimeProvider::readDatagram(QSctpSocket &from, const QByteArray &ba)
+{
+    QDataStream in_ds(ba);
+    QTime curTime = QTime::currentTime();
+    QTime clientTime;
+
+    in_ds >> clientTime;
+    if (!clientTime.isValid() || curTime.second() != clientTime.second()
+        || curTime.minute() != clientTime.minute()
+        || curTime.hour() != clientTime.hour()) {
+        QByteArray buf;
+        QDataStream out_ds(&buf, QIODevice::WriteOnly);
+
+        out_ds << curTime;
+        emit writeDatagram(&from, buf);
+    }
+}
diff --git a/examples/network/multistreamserver/timeprovider.h b/examples/network/multistreamserver/timeprovider.h
new file mode 100644
index 0000000000..b57c066c24
--- /dev/null
+++ b/examples/network/multistreamserver/timeprovider.h
@@ -0,0 +1,55 @@
+/****************************************************************************
+**
+** Copyright (C) 2016 Alex Trotsenko <alex1973tr@gmail.com>
+** Contact: http://www.qt.io/licensing/
+**
+** 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 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."
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef TIMEPROVIDER_H
+#define TIMEPROVIDER_H
+
+#include "provider.h"
+
+class TimeProvider : public Provider
+{
+    Q_OBJECT
+public:
+    explicit TimeProvider(QObject *parent = nullptr);
+
+    void readDatagram(QSctpSocket &from, const QByteArray &ba) Q_DECL_OVERRIDE;
+};
+
+#endif