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/****************************************************************************
**
** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** This file is part of the QtNetwork module 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 http://qt.nokia.com/contact.
** $QT_END_LICENSE$
**
****************************************************************************/
#include "qlocalserver.h"
#include "qlocalserver_p.h"
#include "qlocalsocket.h"
#include <qdebug.h>
#include <qdatetime.h>
#include <qcoreapplication.h>
#include <QMetaType>
// The buffer size need to be 0 otherwise data could be
// lost if the socket that has written data closes the connection
// before it is read. Pipewriter is used for write buffering.
#define BUFSIZE 0
QT_BEGIN_NAMESPACE
QLocalServerThread::QLocalServerThread(QObject *parent) : QThread(parent),
maxPendingConnections(1)
{
stopEvent = CreateEvent(NULL, TRUE, FALSE, NULL);
gotConnectionEvent = CreateEvent(NULL, TRUE, FALSE, NULL);
}
QLocalServerThread::~QLocalServerThread()
{
stop();
closeServer();
CloseHandle(stopEvent);
CloseHandle(gotConnectionEvent);
}
void QLocalServerThread::stop()
{
if (isRunning()) {
SetEvent(stopEvent);
wait();
ResetEvent(stopEvent);
}
}
void QLocalServerThread::closeServer()
{
while (!pendingHandles.isEmpty())
CloseHandle(pendingHandles.dequeue());
}
QString QLocalServerThread::setName(const QString &name)
{
QString pipePath = QLatin1String("\\\\.\\pipe\\");
if (name.startsWith(pipePath))
fullServerName = name;
else
fullServerName = pipePath + name;
for (int i = pendingHandles.count(); i < maxPendingConnections; ++i)
if (!makeHandle())
break;
return fullServerName;
}
bool QLocalServerThread::makeHandle()
{
if (pendingHandles.count() >= maxPendingConnections)
return false;
HANDLE handle = INVALID_HANDLE_VALUE;
QT_WA({
handle = CreateNamedPipeW(
(TCHAR*)fullServerName.utf16(), // pipe name
PIPE_ACCESS_DUPLEX | FILE_FLAG_OVERLAPPED, // read/write access
PIPE_TYPE_MESSAGE | // message type pipe
PIPE_READMODE_MESSAGE | // message-read mode
PIPE_WAIT, // blocking mode
PIPE_UNLIMITED_INSTANCES, // max. instances
BUFSIZE, // output buffer size
BUFSIZE, // input buffer size
3000, // client time-out
NULL);
}, {
handle = CreateNamedPipeA(
fullServerName.toLocal8Bit().constData(), // pipe name
PIPE_ACCESS_DUPLEX | FILE_FLAG_OVERLAPPED, // read/write access
PIPE_TYPE_MESSAGE | // message type pipe
PIPE_READMODE_MESSAGE | // message-read mode
PIPE_WAIT, // blocking mode
PIPE_UNLIMITED_INSTANCES, // max. instances
BUFSIZE, // output buffer size
BUFSIZE, // input buffer size
3000, // client time-out
NULL);
});
if (INVALID_HANDLE_VALUE == handle) {
return false;
}
pendingHandles.enqueue(handle);
return true;
}
void QLocalServerThread::run()
{
OVERLAPPED op;
HANDLE handleArray[2];
memset(&op, 0, sizeof(op));
handleArray[0] = op.hEvent = CreateEvent(NULL, TRUE, FALSE, NULL);
handleArray[1] = stopEvent;
HANDLE handle = INVALID_HANDLE_VALUE;
forever {
if (INVALID_HANDLE_VALUE == handle) {
makeHandle();
if (!pendingHandles.isEmpty())
handle = pendingHandles.dequeue();
}
if (INVALID_HANDLE_VALUE == handle) {
int windowsError = GetLastError();
QString function = QLatin1String("QLocalServer::run");
QString errorString = QLocalServer::tr("%1: Unknown error %2").arg(function).arg(windowsError);
emit error(QAbstractSocket::UnknownSocketError, errorString);
CloseHandle(handleArray[0]);
SetEvent(gotConnectionEvent);
return;
}
BOOL isConnected = ConnectNamedPipe(handle, &op) ? TRUE : (GetLastError() == ERROR_PIPE_CONNECTED);
if (!isConnected) {
switch (WaitForMultipleObjects(2, handleArray, FALSE, INFINITE))
{
case WAIT_OBJECT_0 + 1:
CloseHandle(handle);
CloseHandle(handleArray[0]);
return;
}
}
emit connected(handle);
handle = INVALID_HANDLE_VALUE;
ResetEvent(handleArray[0]);
SetEvent(gotConnectionEvent);
}
}
void QLocalServerPrivate::init()
{
Q_Q(QLocalServer);
qRegisterMetaType<HANDLE>("HANDLE");
q->connect(&waitForConnection, SIGNAL(connected(HANDLE)),
q, SLOT(_q_openSocket(HANDLE)), Qt::QueuedConnection);
q->connect(&waitForConnection, SIGNAL(finished()),
q, SLOT(_q_stoppedListening()), Qt::QueuedConnection);
q->connect(&waitForConnection, SIGNAL(terminated()),
q, SLOT(_q_stoppedListening()), Qt::QueuedConnection);
q->connect(&waitForConnection, SIGNAL(error(QAbstractSocket::SocketError, const QString &)),
q, SLOT(_q_setError(QAbstractSocket::SocketError, const QString &)));
}
bool QLocalServerPrivate::removeServer(const QString &name)
{
Q_UNUSED(name);
return true;
}
bool QLocalServerPrivate::listen(const QString &name)
{
fullServerName = waitForConnection.setName(name);
serverName = name;
waitForConnection.start();
return true;
}
void QLocalServerPrivate::_q_setError(QAbstractSocket::SocketError e, const QString &eString)
{
error = e;
errorString = eString;
}
void QLocalServerPrivate::_q_stoppedListening()
{
Q_Q(QLocalServer);
if (!inWaitingFunction)
q->close();
}
void QLocalServerPrivate::_q_openSocket(HANDLE handle)
{
Q_Q(QLocalServer);
q->incomingConnection((int)handle);
}
void QLocalServerPrivate::closeServer()
{
waitForConnection.stop();
waitForConnection.closeServer();
}
void QLocalServerPrivate::waitForNewConnection(int msecs, bool *timedOut)
{
Q_Q(QLocalServer);
if (!pendingConnections.isEmpty() || !q->isListening())
return;
DWORD result = WaitForSingleObject(waitForConnection.gotConnectionEvent,
(msecs == -1) ? INFINITE : msecs);
if (result == WAIT_TIMEOUT) {
if (timedOut)
*timedOut = true;
} else {
ResetEvent(waitForConnection.gotConnectionEvent);
QCoreApplication::instance()->processEvents();
}
}
QT_END_NAMESPACE
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