QTfrontend/net/tcpBase.cpp
author unc0rr
Fri, 07 Jun 2013 12:51:09 +0400
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child 9212 1d4e1469940b
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/*
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 * Hedgewars, a free turn based strategy game
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 * Copyright (c) 2006-2007 Igor Ulyanov <iulyanov@gmail.com>
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 * Copyright (c) 2004-2013 Andrey Korotaev <unC0Rr@gmail.com>
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 *
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 * This program is free software; you can redistribute it and/or modify
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 * it under the terms of the GNU General Public License as published by
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 * the Free Software Foundation; version 2 of the License
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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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
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 */
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#include "tcpBase.h"
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#include <QList>
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#include <QImage>
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#include <QThread>
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#include "hwconsts.h"
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#include "MessageDialog.h"
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#ifdef HWLIBRARY
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extern "C" void Game(char**arguments);
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extern "C" void GenLandPreview(int port);
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EngineInstance::EngineInstance(QObject *parent)
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    : QObject(parent)
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{
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    port = 0;
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}
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EngineInstance::~EngineInstance()
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{
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}
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void EngineInstance::start()
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{
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#if 0
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    char *args[11];
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    args[0] = "65000";  //ipcPort
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    args[1] = "1024";   //cScreenWidth
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    args[2] = "768";    //cScreenHeight
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    args[3] = "0";      //cReducedQuality
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    args[4] = "en.txt"; //cLocaleFName
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    args[5] = "koda";   //UserNick
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    args[6] = "1";      //SetSound
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    args[7] = "1";      //SetMusic
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    args[8] = "0";      //cAltDamage
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    args[9]= datadir->absolutePath().toAscii().data(); //cPathPrefix
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    args[10]= NULL;     //recordFileName
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    Game(args);
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#endif
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    GenLandPreview(port);
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}
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#endif
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QList<TCPBase*> srvsList;
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QPointer<QTcpServer> TCPBase::IPCServer(0);
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TCPBase::~TCPBase()
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{
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    // make sure this object is not in the server list anymore
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    srvsList.removeOne(this);
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    if (IPCSocket)
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        IPCSocket->deleteLater();
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}
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TCPBase::TCPBase(bool demoMode, QObject *parent) :
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    QObject(parent),
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    m_hasStarted(false),
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    m_isDemoMode(demoMode),
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    IPCSocket(0)
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{
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    if(!IPCServer)
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    {
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        IPCServer = new QTcpServer(0);
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        IPCServer->setMaxPendingConnections(1);
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        if (!IPCServer->listen(QHostAddress::LocalHost))
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        {
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            MessageDialog::ShowFatalMessage(tr("Unable to start server at %1.").arg(IPCServer->errorString()));
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            exit(0); // FIXME - should be graceful exit here (lower Critical -> Warning above when implemented)
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        }
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    }
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    ipc_port=IPCServer->serverPort();
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}
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void TCPBase::NewConnection()
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{
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    if(IPCSocket)
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    {
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        // connection should be already finished
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        return;
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    }
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    disconnect(IPCServer, SIGNAL(newConnection()), this, SLOT(NewConnection()));
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    IPCSocket = IPCServer->nextPendingConnection();
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    if(!IPCSocket) return;
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    connect(IPCSocket, SIGNAL(disconnected()), this, SLOT(ClientDisconnect()));
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    connect(IPCSocket, SIGNAL(readyRead()), this, SLOT(ClientRead()));
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    SendToClientFirst();
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}
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void TCPBase::RealStart()
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{
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    connect(IPCServer, SIGNAL(newConnection()), this, SLOT(NewConnection()));
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    IPCSocket = 0;
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#ifdef HWLIBRARY
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    QThread *thread = new QThread;
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    EngineInstance *instance = new EngineInstance;
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    instance->port = IPCServer->serverPort();
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    instance->moveToThread(thread);
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    connect(thread, SIGNAL(started()), instance, SLOT(start(void)));
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    connect(instance, SIGNAL(finished()), thread, SLOT(quit()));
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    connect(instance, SIGNAL(finished()), instance, SLOT(deleteLater()));
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    connect(instance, SIGNAL(finished()), thread, SLOT(deleteLater()));
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    thread->start();
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#else
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    QProcess * process;
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    process = new QProcess();
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    connect(process, SIGNAL(error(QProcess::ProcessError)), this, SLOT(StartProcessError(QProcess::ProcessError)));
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    QStringList arguments=getArguments();
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#ifdef DEBUG
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    // redirect everything written on stdout/stderr
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    process->setProcessChannelMode(QProcess::ForwardedChannels);
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#endif
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    process->start(bindir->absolutePath() + "/hwengine", arguments);
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#endif
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    m_hasStarted = true;
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}
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void TCPBase::ClientDisconnect()
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{
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    disconnect(IPCSocket, SIGNAL(readyRead()), this, SLOT(ClientRead()));
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    onClientDisconnect();
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    emit isReadyNow();
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    IPCSocket->deleteLater();
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    deleteLater();
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}
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void TCPBase::ClientRead()
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{
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    QByteArray readed=IPCSocket->readAll();
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    if(readed.isEmpty()) return;
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    readbuffer.append(readed);
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    onClientRead();
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}
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void TCPBase::StartProcessError(QProcess::ProcessError error)
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{
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    MessageDialog::ShowFatalMessage(tr("Unable to run engine at %1\nError code: %2").arg(bindir->absolutePath() + "/hwengine").arg(error));
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    ClientDisconnect();
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}
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void TCPBase::tcpServerReady()
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{
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    disconnect(srvsList.first(), SIGNAL(isReadyNow()), this, SLOT(tcpServerReady()));
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    RealStart();
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}
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void TCPBase::Start(bool couldCancelPreviousRequest)
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{
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    if(srvsList.isEmpty())
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    {
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        srvsList.push_back(this);
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        RealStart();
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    }
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    else
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    {
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        TCPBase * last = srvsList.last();
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        if(couldCancelPreviousRequest
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            && last->couldBeRemoved()
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            && (last->parent() == parent()))
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        {
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            srvsList.removeLast();
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            last->deleteLater();
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            Start(couldCancelPreviousRequest);
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        } else
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        {
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            connect(srvsList.last(), SIGNAL(isReadyNow()), this, SLOT(tcpServerReady()));
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            srvsList.push_back(this);
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        }
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    }
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}
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void TCPBase::onClientRead()
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{
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}
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void TCPBase::onClientDisconnect()
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{
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}
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void TCPBase::SendToClientFirst()
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{
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}
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void TCPBase::SendIPC(const QByteArray & buf)
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{
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    if (buf.size() > MAXMSGCHARS) return;
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    quint8 len = buf.size();
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    RawSendIPC(QByteArray::fromRawData((char *)&len, 1) + buf);
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}
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void TCPBase::RawSendIPC(const QByteArray & buf)
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{
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    if (!IPCSocket)
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    {
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        toSendBuf += buf;
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    }
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    else
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    {
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        if (toSendBuf.size() > 0)
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        {
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            IPCSocket->write(toSendBuf);
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            if(m_isDemoMode) demo.append(toSendBuf);
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            toSendBuf.clear();
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        }
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        if(!buf.isEmpty())
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        {
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            IPCSocket->write(buf);
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            if(m_isDemoMode) demo.append(buf);
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        }
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    }
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}
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bool TCPBase::couldBeRemoved()
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{
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    return false;
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}