mirror of
https://github.com/qbittorrent/qBittorrent.git
synced 2025-01-09 00:27:28 +03:00
a5c531f0a4
Some linux distros seem to alter TMPDIR environment variable and therefore hamper qbt ability to find the lock files. So use config folder instead of TMPDIR folder to create/locate the lock files. Note that this change will also make qbt become one instance per-user instead of one instance per-system. Closes #15646.
228 lines
7.2 KiB
C++
228 lines
7.2 KiB
C++
/*
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* Bittorrent Client using Qt and libtorrent.
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* Copyright (C) 2019 Mike Tzou (Chocobo1)
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*
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* In addition, as a special exception, the copyright holders give permission to
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* link this program with the OpenSSL project's "OpenSSL" library (or with
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* modified versions of it that use the same license as the "OpenSSL" library),
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* and distribute the linked executables. You must obey the GNU General Public
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* License in all respects for all of the code used other than "OpenSSL". If you
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* modify file(s), you may extend this exception to your version of the file(s),
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* but you are not obligated to do so. If you do not wish to do so, delete this
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* exception statement from your version.
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*
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****************************************************************************
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**
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** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
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** Contact: http://www.qt-project.org/legal
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**
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** This file is part of the Qt Solutions component.
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**
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** $QT_BEGIN_LICENSE:BSD$
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** You may use this file under the terms of the BSD license as follows:
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**
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** "Redistribution and use in source and binary forms, with or without
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** modification, are permitted provided that the following conditions are
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** met:
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** * Redistributions of source code must retain the above copyright
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** notice, this list of conditions and the following disclaimer.
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** * Redistributions in binary form must reproduce the above copyright
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** notice, this list of conditions and the following disclaimer in
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** the documentation and/or other materials provided with the
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** distribution.
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** * Neither the name of Digia Plc and its Subsidiary(-ies) nor the names
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** of its contributors may be used to endorse or promote products derived
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** from this software without specific prior written permission.
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**
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**
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** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
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**
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** $QT_END_LICENSE$
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**
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****************************************************************************
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*/
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#include "qtlocalpeer.h"
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#include <QtGlobal>
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#if defined(Q_OS_WIN)
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#include <Windows.h>
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#endif
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#include <QDataStream>
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#include <QFileInfo>
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#include <QLocalServer>
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#include <QLocalSocket>
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namespace QtLP_Private
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{
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#include "qtlockedfile.cpp"
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#if defined(Q_OS_WIN)
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#include "qtlockedfile_win.cpp"
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#else
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#include "qtlockedfile_unix.cpp"
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#endif
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}
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const char* QtLocalPeer::ack = "ack";
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QtLocalPeer::QtLocalPeer(const QString &path, QObject *parent)
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: QObject(parent)
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, socketName(path + QLatin1String("/ipc-socket"))
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, server(new QLocalServer(this))
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{
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server->setSocketOptions(QLocalServer::UserAccessOption);
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lockFile.setFileName(path + QLatin1String("/lockfile"));
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lockFile.open(QIODevice::ReadWrite);
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}
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QtLocalPeer::~QtLocalPeer()
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{
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if (!isClient())
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{
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lockFile.unlock();
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lockFile.remove();
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}
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}
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bool QtLocalPeer::isClient()
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{
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if (lockFile.isLocked())
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return false;
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if (!lockFile.lock(QtLP_Private::QtLockedFile::WriteLock, false))
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return true;
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bool res = server->listen(socketName);
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#if defined(Q_OS_UNIX)
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// ### Workaround
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if (!res && server->serverError() == QAbstractSocket::AddressInUseError)
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{
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QFile::remove(socketName);
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res = server->listen(socketName);
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}
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#endif
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if (!res)
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qWarning("QtSingleCoreApplication: listen on local socket failed, %s", qPrintable(server->errorString()));
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connect(server, &QLocalServer::newConnection, this, &QtLocalPeer::receiveConnection);
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return false;
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}
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bool QtLocalPeer::sendMessage(const QString &message, const int timeout)
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{
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if (!isClient())
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return false;
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QLocalSocket socket;
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bool connOk = false;
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for(int i = 0; i < 2; i++)
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{
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// Try twice, in case the other instance is just starting up
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socket.connectToServer(socketName);
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connOk = socket.waitForConnected(timeout/2);
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if (connOk || i)
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break;
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int ms = 250;
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#if defined(Q_OS_WIN)
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Sleep(DWORD(ms));
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#else
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struct timespec ts = { ms / 1000, (ms % 1000) * 1000 * 1000 };
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nanosleep(&ts, NULL);
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#endif
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}
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if (!connOk)
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return false;
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QByteArray uMsg(message.toUtf8());
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QDataStream ds(&socket);
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ds.writeBytes(uMsg.constData(), uMsg.size());
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bool res = socket.waitForBytesWritten(timeout);
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if (res)
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{
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res &= socket.waitForReadyRead(timeout); // wait for ack
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if (res)
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res &= (socket.read(qstrlen(ack)) == ack);
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}
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return res;
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}
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void QtLocalPeer::receiveConnection()
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{
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QLocalSocket* socket = server->nextPendingConnection();
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if (!socket)
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return;
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while (true)
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{
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if (socket->state() == QLocalSocket::UnconnectedState)
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{
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qWarning("QtLocalPeer: Peer disconnected");
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delete socket;
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return;
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}
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if (socket->bytesAvailable() >= qint64(sizeof(quint32)))
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break;
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socket->waitForReadyRead();
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}
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QDataStream ds(socket);
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QByteArray uMsg;
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quint32 remaining;
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ds >> remaining;
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if (remaining > 65535)
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{
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// drop suspiciously large data
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delete socket;
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return;
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}
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uMsg.resize(remaining);
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int got = 0;
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char* uMsgBuf = uMsg.data();
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do
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{
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got = ds.readRawData(uMsgBuf, remaining);
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remaining -= got;
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uMsgBuf += got;
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} while (remaining && got >= 0 && socket->waitForReadyRead(2000));
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if (got < 0)
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{
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qWarning("QtLocalPeer: Message reception failed %s", socket->errorString().toLatin1().constData());
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delete socket;
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return;
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}
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QString message(QString::fromUtf8(uMsg));
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socket->write(ack, qstrlen(ack));
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socket->waitForBytesWritten(1000);
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socket->waitForDisconnected(1000); // make sure client reads ack
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delete socket;
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emit messageReceived(message); //### (might take a long time to return)
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}
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