KviIrcConnectionTargetResolver.h

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#ifndef _KVI_IRCCONNECTIONTARGETRESOLVER_H_
#define _KVI_IRCCONNECTIONTARGETRESOLVER_H_
//=============================================================================
//
//   File : KviIrcConnectionTargetResolver.h
//   Creation date : Fri 11 May 2004 23:17:42 by Szymon Stefanek
//
//   This file is part of the KVIrc IRC client distribution
//   Copyright (C) 2004-2010 Szymon Stefanek <pragma at kvirc dot net>
//
//   This program is FREE software. You can redistribute it and/or
//   modify it under the terms of the GNU General Public License
//   as published by the Free Software Foundation; either version 2
//   of the License, or (at your option) any later version.
//
//   This program is distributed in the HOPE that it will be USEFUL,
//   but WITHOUT ANY WARRANTY; without even the implied warranty of
//   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
//   See the GNU General Public License for more details.
//
//   You should have received a copy of the GNU General Public License
//   along with this program. If not, write to the Free Software Foundation,
//   Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
//
//=============================================================================

#include "kvi_settings.h"
#include "KviQString.h"

#include <QObject>

#ifdef Status
#undef Status
#endif

#ifdef Success
#undef Success
#endif

#ifdef Error
#undef Error
#endif

class KviConsoleWindow;
class KviDnsResolver;
class KviIrcConnection;
class KviIrcConnectionTarget;

class QTimer;

class KVIRC_API KviIrcConnectionTargetResolver : public QObject
{
        friend class KviIrcLink; // upper protocol in the stack
        Q_OBJECT
protected:
        KviIrcConnectionTargetResolver(KviIrcConnection * pConnection);
        ~KviIrcConnectionTargetResolver();

public:
        enum Status
        {
                Success,
                Error
        };
        enum State
        {
                Idle,
                Running,
                Terminated
        };

private:
        KviIrcConnection * m_pConnection;   // shallow, never null
        KviIrcConnectionTarget * m_pTarget; // shallow, never null
        KviConsoleWindow * m_pConsole;      // shallow, never null
        Status m_eStatus;
        State m_eState;

        // Auxiliary stuff
        QTimer * m_pStartTimer;        // timer used to start the connection
        KviDnsResolver * m_pProxyDns;  // the dns object for the proxy hostnames
        KviDnsResolver * m_pServerDns; // the dns object for the server hostnames

        char * m_pReadBuffer;
        unsigned int m_uReadBufferLen;
        unsigned int m_uReadPackets;

        int m_iLastError;

public:
        void start(KviIrcConnectionTarget * t);
        // valid only after the terminated() signal
        Status status() { return m_eStatus; };
        int lastError() { return m_iLastError; };
        // causes the resolver to terminate with iLastError == KviError_operationAborted
        // the terminated() signal is emitted.
        void abort();
protected slots:
        void asyncStartResolve();
        void serverLookupTerminated(KviDnsResolver *);
        void proxyLookupTerminated(KviDnsResolver *);

private:
        void cleanup();
        void lookupProxyHostname();
        void lookupServerHostname();
        void haveServerIp();
        bool validateLocalAddress(const QString & szAddress, QString & szBuffer);
        void terminate(Status s, int iLastError);
signals:
        void terminated();
};

#endif