D:/Storage/CVS_Head/h323plus/include/h323t120.h

/*
 * h323t120.h
 *
 * H.323 T.120 logical channel establishment
 *
 * Open H323 Library
 *
 * Copyright (c) 2001 Equivalence Pty. Ltd.
 *
 * The contents of this file are subject to the Mozilla Public License
 * Version 1.0 (the "License"); you may not use this file except in
 * compliance with the License. You may obtain a copy of the License at
 * http://www.mozilla.org/MPL/
 *
 * Software distributed under the License is distributed on an "AS IS"
 * basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
 * the License for the specific language governing rights and limitations
 * under the License.
 *
 * The Original Code is Open H323 Library.
 *
 * The Initial Developer of the Original Code is Equivalence Pty. Ltd.
 *
 * Contributor(s): ______________________________________.
 *
 * $Log: h323t120.h,v $
 * Revision 1.1  2007/08/06 20:50:49  shorne
 * First commit of h323plus
 *
 * Revision 1.8  2005/11/30 13:05:01  csoutheren
 * Changed tags for Doxygen
 *
 * Revision 1.7  2002/09/16 01:14:15  robertj
 * Added #define so can select if #pragma interface/implementation is used on
 *   platform basis (eg MacOS) rather than compiler, thanks Robert Monaghan.
 *
 * Revision 1.6  2002/09/03 06:19:37  robertj
 * Normalised the multi-include header prevention ifdef/define symbol.
 *
 * Revision 1.5  2002/08/05 10:03:47  robertj
 * Cosmetic changes to normalise the usage of pragma interface/implementation.
 *
 * Revision 1.4  2002/05/10 05:47:37  robertj
 * Added session ID to the data logical channel class.
 *
 * Revision 1.3  2002/02/01 01:46:50  robertj
 * Some more fixes for T.120 channel establishment, more to do!
 *
 * Revision 1.2  2002/01/09 00:21:36  robertj
 * Changes to support outgoing H.245 RequstModeChange.
 *
 * Revision 1.1  2001/07/17 04:44:29  robertj
 * Partial implementation of T.120 and T.38 logical channels.
 *
 */

#ifndef __OPAL_H323T120_H
#define __OPAL_H323T120_H

#ifdef P_USE_PRAGMA
#pragma interface
#endif


#include "h323caps.h"
#include "channels.h"


class OpalT120Protocol;



class H323_T120Capability : public H323DataCapability
{
    PCLASSINFO(H323_T120Capability, H323DataCapability);
  public:
    H323_T120Capability();

    virtual PObject * Clone() const;

    virtual unsigned GetSubType() const;

    virtual PString GetFormatName() const;

    virtual H323Channel * CreateChannel(
      H323Connection & connection,    
      H323Channel::Directions dir,    
      unsigned sessionID,             
      const H245_H2250LogicalChannelParameters * param
    ) const;

    virtual BOOL OnSendingPDU(
      H245_DataApplicationCapability & pdu
    ) const;

    virtual BOOL OnSendingPDU(
      H245_DataMode & pdu  
    ) const;

    virtual BOOL OnSendingPDU(
      H245_DataProtocolCapability & pdu  
    ) const;

    virtual BOOL OnReceivedPDU(
      const H245_DataApplicationCapability & pdu  
    );

    BOOL GetDynamicPortCapability() const { return dynamicPortCapability; }

    void SetDynamicPortCapability(BOOL dynamic) { dynamicPortCapability = dynamic; }

  protected:
    BOOL dynamicPortCapability;
};


class H323_T120Channel : public H323DataChannel
{
    PCLASSINFO(H323_T120Channel, H323DataChannel);
  public:
    H323_T120Channel(
      H323Connection & connection,        
      const H323Capability & capability,  
      Directions direction,               
      unsigned sessionID                  
    );

    virtual void Receive();

    virtual void Transmit();

    virtual BOOL OnSendingPDU(
      H245_OpenLogicalChannel & openPDU  
    ) const;

    virtual void OnSendOpenAck(
      const H245_OpenLogicalChannel & open,   
      H245_OpenLogicalChannelAck & ack        
    ) const;

    virtual BOOL OnReceivedPDU(
      const H245_OpenLogicalChannel & pdu,    
      unsigned & errorCode                    
    );

    virtual BOOL OnReceivedAckPDU(
      const H245_OpenLogicalChannelAck & pdu 
    );

    virtual void HandleChannel();

  protected:
    OpalT120Protocol * t120handler;
};


#endif // __OPAL_H323T120_H

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