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/****************************************************************************
**
** Copyright (C) 2009 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 <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>
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