diff -r 41300fa6a67c -r f7bc934e204c util/tests/auto/qudpsocket/clientserver/main.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/util/tests/auto/qudpsocket/clientserver/main.cpp	Wed Mar 31 11:06:36 2010 +0300
@@ -0,0 +1,170 @@
+/****************************************************************************
+**
+** 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 test suite of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** No Commercial Usage
+** This file contains pre-release code and may not be distributed.
+** You may use this file in accordance with the terms and conditions
+** contained in the Technology Preview License Agreement accompanying
+** this package.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 2.1 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Nokia gives you certain additional
+** rights.  These rights are described in the Nokia Qt LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** If you have questions regarding the use of this file, please contact
+** Nokia at qt-info@nokia.com.
+**
+**
+**
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+#include <QtNetwork>
+
+class ClientServer : public QUdpSocket
+{
+    Q_OBJECT
+public:
+    enum Type {
+        ConnectedClient,
+        UnconnectedClient,
+        Server
+    };
+
+    ClientServer(Type type, const QString &host, quint16 port)
+        : type(type)
+    {
+        switch (type) {
+        case Server:
+            if (bind(0, ShareAddress | ReuseAddressHint)) {
+                printf("%d\n", localPort());
+            } else {
+                printf("XXX\n");
+            }
+            break;
+        case ConnectedClient:
+            connectToHost(host, port);
+            startTimer(250);
+            printf("ok\n");
+            break;
+        case UnconnectedClient:
+            peerAddress = host;
+            peerPort = port;
+            if (bind(QHostAddress::Any, port + 1, ShareAddress | ReuseAddressHint)) {
+                startTimer(250);
+                printf("ok\n");
+            } else {
+                printf("XXX\n");
+            }
+            break;
+        }
+        fflush(stdout);
+
+        connect(this, SIGNAL(readyRead()), this, SLOT(readData()));
+    }
+
+protected:
+    void timerEvent(QTimerEvent *event)
+    {
+        static int n = 0;
+        switch (type) {
+        case ConnectedClient:
+            write(QByteArray::number(n++));
+            break;
+        case UnconnectedClient:
+            writeDatagram(QByteArray::number(n++), peerAddress, peerPort);
+            break;
+        default:
+            break;
+        }
+
+        QUdpSocket::timerEvent(event);
+    }
+
+private slots:
+    void readData()
+    {
+        printf("readData()\n");
+        switch (type) {
+        case ConnectedClient: {
+            while (bytesAvailable() || hasPendingDatagrams()) {
+                QByteArray data = readAll();
+                printf("got %d\n", data.toInt());
+            }
+            break;
+        }
+        case UnconnectedClient: {
+            while (hasPendingDatagrams()) {
+                QByteArray data;
+                data.resize(pendingDatagramSize());
+                readDatagram(data.data(), data.size());
+                printf("got %d\n", data.toInt());
+            }
+            break;
+        }
+        case Server: {
+            while (hasPendingDatagrams()) {
+                QHostAddress sender;
+                quint16 senderPort;
+                QByteArray data;
+                data.resize(pendingDatagramSize());
+                readDatagram(data.data(), data.size(), &sender, &senderPort);
+                printf("got %d\n", data.toInt());
+                printf("sending %d\n", data.toInt() * 2);
+                writeDatagram(QByteArray::number(data.toInt() * 2), sender, senderPort);
+            }
+            break;
+        }
+        }
+        fflush(stdout);
+    }
+
+private:
+    Type type;
+    QHostAddress peerAddress;
+    quint16 peerPort;
+};
+
+int main(int argc, char **argv)
+{
+    QCoreApplication app(argc, argv);
+    ClientServer::Type type;
+    if (app.arguments().size() < 4)  {
+        qDebug("usage: ./%s [ConnectedClient <server> <port>|UnconnectedClient <server> <port>|Server]", argv[0]);
+        return 1;
+    }
+
+    QString arg = app.arguments().at(1).trimmed().toLower();
+    if (arg == "connectedclient")
+        type = ClientServer::ConnectedClient;
+    else if (arg == "unconnectedclient")
+        type = ClientServer::UnconnectedClient;
+    else if (arg == "server")
+        type = ClientServer::Server;
+
+    ClientServer clientServer(type, app.arguments().at(2),
+                              app.arguments().at(3).toInt());
+
+    return app.exec();
+}
+
+#include "main.moc"