RTSPProxySessionFactory.h

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/* Copyright (C) 2000 KOM/Darmstadt University of Technology
 *
 * You are allowed to use all other parts of the code under the following terms:
 *
 * For non-commercial use, code may be used in unmodified form provided
 * that this copyright notice and this permission notice appear in
 * supporting documentation.
 *
 * This software is provided "as is" and without any express or implied
 * warranties, including, without limitation, the implied warranty of
 * fitness for a particular purpose.
 *
 * The code may be subjected to the GNU General Public License, Version 2,
 * and re-distributed under the terms of this license.
 * As a special exception, permission is granted to link this code
 * with the Qt library and distribute executables, as long as you
 * follow the requirements of the GNU GPL in regard to all of the
 * software in the executable aside from Qt.
 *
 * Commercial use other than under the terms of the GNU General Public
 * License is allowed only after express negotiation of conditions
 * with the authors.
 */
#ifndef RTSP_PROXY_SESSION_FACTORY_H
#define RTSP_PROXY_SESSION_FACTORY_H

#include "dictionary.h"
#include "MNString.h"
#include "MNMutex.h"
#include "MNSelector.h"
#include "SIPtr.h"

class ControlBase;
class RTSPProxySession;

typedef OS::SIPtr<RTSPProxySession> ProxySessionPtr;

class RTSPProxySessionFactory 
{
    MNMutex                           _lock;
    int                             _lastSessionNumber;
    dictionary<int,RTSPProxySession*> _sessions_by_id;
    int                               _nextSessionIDdownstream;

public:
    RTSPProxySessionFactory( );
    ~RTSPProxySessionFactory( );

    ProxySessionPtr newSession( MNSelector& slct, int fd, MNString url, bool doDynReflection );
    ProxySessionPtr newSession( MNSelector& slct, int fd );

    ProxySessionPtr getSession( int num );
    //ProxySessionPtr getSessionByUrl( MNString url );

    /* This method returns the RTSPProxySession which matches to SessionId.
     * If none is found, NULL is returned. This is the standard case in
     * unoptimized unicast operation.
     *
     * NEW: As it may happen, that the SAME SessionID is used _and_ by the
     *      OS and the proxy (we even want this), the Session has to be
     *      found with the help of the incoming FillBuffer* too. 
     */
    ProxySessionPtr findSessionWithSessionID( ControlBase* fb, u_int64_t SessionId );

    ProxySessionPtr findSessionWithCSeq( ControlBase* fb, int CSeq );

    ProxySessionPtr assignSessionId( ControlBase* fb, int cseq, u_int64_t id);

    void assignDownstreamSessionId(int sessionNo);
    
    bool forgetSession( u_int64_t sessionId );
    bool forgetSession( ProxySessionPtr Session );
    bool forgetSessionTeardown( ProxySessionPtr Session);
    bool forgetSession( RTSPProxySession* Session );

    void forgetSessionsBySocket( int fd );

private:
    RTSPProxySession* private_findOneSessionBySocket( int fd, bool& fromBelow );

    void private_dumpSessions( );
};

#endif /* RTSP_PROXY_SESSION_FACTORY_H */

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