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+/****************************************************************************
+**
+** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
+** Contact: Qt Software Information (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 either Technology Preview License Agreement or the
+** Beta Release License Agreement.
+**
+** 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 1.0, included in the file LGPL_EXCEPTION.txt in this
+** package.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3.0 as published by the Free Software
+** Foundation and appearing in the file LICENSE.GPL included in the
+** packaging of this file. Please review the following information to
+** ensure the GNU General Public License version 3.0 requirements will be
+** met: http://www.gnu.org/copyleft/gpl.html.
+**
+** If you are unsure which license is appropriate for your use, please
+** contact the sales department at qt-sales@nokia.com.
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+
+#include <QtTest/QtTest>
+
+#include <QtCore/QCoreApplication>
+#include <QtCore/QSocketNotifier>
+#include <QtNetwork/QTcpServer>
+#include <QtNetwork/QTcpSocket>
+#include <private/qnativesocketengine_p.h>
+
+class tst_QSocketNotifier : public QObject
+{
+ Q_OBJECT
+public:
+ tst_QSocketNotifier();
+ ~tst_QSocketNotifier();
+
+private slots:
+ void unexpectedDisconnection();
+};
+
+tst_QSocketNotifier::tst_QSocketNotifier()
+{ }
+
+tst_QSocketNotifier::~tst_QSocketNotifier()
+{
+}
+
+class UnexpectedDisconnectTester : public QObject
+{
+ Q_OBJECT
+public:
+ QNativeSocketEngine *readEnd1, *readEnd2;
+ int sequence;
+
+ UnexpectedDisconnectTester(QNativeSocketEngine *s1, QNativeSocketEngine *s2)
+ : readEnd1(s1), readEnd2(s2), sequence(0)
+ {
+ QSocketNotifier *notifier1 =
+ new QSocketNotifier(readEnd1->socketDescriptor(), QSocketNotifier::Read, this);
+ connect(notifier1, SIGNAL(activated(int)), SLOT(handleActivated()));
+ QSocketNotifier *notifier2 =
+ new QSocketNotifier(readEnd2->socketDescriptor(), QSocketNotifier::Read, this);
+ connect(notifier2, SIGNAL(activated(int)), SLOT(handleActivated()));
+ }
+
+public slots:
+ void handleActivated()
+ {
+ char data1[1], data2[1];
+ ++sequence;
+ if (sequence == 1) {
+ // read from both ends
+ (void) readEnd1->read(data1, sizeof(data1));
+ (void) readEnd2->read(data2, sizeof(data2));
+ emit finished();
+ } else if (sequence == 2) {
+ // we should never get here
+ QCOMPARE(readEnd2->read(data2, sizeof(data2)), qint64(-2));
+ QVERIFY(readEnd2->isValid());
+ }
+ }
+
+signals:
+ void finished();
+};
+
+void tst_QSocketNotifier::unexpectedDisconnection()
+{
+ /*
+ Given two sockets and two QSocketNotifiers registered on each
+ their socket. If both sockets receive data, and the first slot
+ invoked by one of the socket notifiers empties both sockets, the
+ other notifier will also emit activated(). This results in
+ unexpected disconnection in QAbstractSocket.
+
+ The use case is that somebody calls one of the
+ waitFor... functions in a QSocketNotifier activated slot, and
+ the waitFor... functions do local selects that can empty both
+ stdin and stderr while waiting for fex bytes to be written.
+ */
+
+ QTcpServer server;
+ QVERIFY(server.listen(QHostAddress::LocalHost, 0));
+
+ QNativeSocketEngine readEnd1;
+ readEnd1.initialize(QAbstractSocket::TcpSocket);
+ bool b = readEnd1.connectToHost(server.serverAddress(), server.serverPort());
+ QVERIFY(readEnd1.waitForWrite());
+// while (!b && readEnd1.state() != QAbstractSocket::ConnectedState)
+// b = readEnd1.connectToHost(server.serverAddress(), server.serverPort());
+ QVERIFY(readEnd1.state() == QAbstractSocket::ConnectedState);
+ QVERIFY(server.waitForNewConnection());
+ QTcpSocket *writeEnd1 = server.nextPendingConnection();
+ QVERIFY(writeEnd1 != 0);
+
+ QNativeSocketEngine readEnd2;
+ readEnd2.initialize(QAbstractSocket::TcpSocket);
+ b = readEnd2.connectToHost(server.serverAddress(), server.serverPort());
+ QVERIFY(readEnd2.waitForWrite());
+// while (!b)
+// b = readEnd2.connectToHost(server.serverAddress(), server.serverPort());
+ QVERIFY(readEnd2.state() == QAbstractSocket::ConnectedState);
+ QVERIFY(server.waitForNewConnection());
+ QTcpSocket *writeEnd2 = server.nextPendingConnection();
+ QVERIFY(writeEnd2 != 0);
+
+ writeEnd1->write("1", 1);
+ writeEnd2->write("2", 1);
+
+ writeEnd1->waitForBytesWritten();
+ writeEnd2->waitForBytesWritten();
+
+ writeEnd1->flush();
+ writeEnd2->flush();
+
+ UnexpectedDisconnectTester tester(&readEnd1, &readEnd2);
+ QEventLoop eventLoop;
+ connect(&tester, SIGNAL(finished()), &eventLoop, SLOT(quit()));
+ eventLoop.exec();
+
+ QVERIFY(readEnd1.state() == QAbstractSocket::ConnectedState);
+ QVERIFY(readEnd2.state() == QAbstractSocket::ConnectedState);
+#if defined(Q_OS_WIN)
+ qWarning("### Windows returns 1 activation, Unix returns 2.");
+ QCOMPARE(tester.sequence, 1);
+#else
+ QCOMPARE(tester.sequence, 2);
+#endif
+
+ readEnd1.close();
+ readEnd2.close();
+ writeEnd1->close();
+ writeEnd2->close();
+ server.close();
+}
+
+QTEST_MAIN(tst_QSocketNotifier)
+#include <tst_qsocketnotifier.moc>