h323t38.h

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/*
 * h323t38.h
 *
 * H.323 T.38 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): ______________________________________.
 *
 * $Revision: 19279 $
 * $Author: rjongbloed $
 * $Date: 2008-01-17 04:08:34 +0000 (Thu, 17 Jan 2008) $
 */

#ifndef __OPAL_H323T38_H
#define __OPAL_H323T38_H

#ifdef P_USE_PRAGMA
#pragma interface
#endif


#include <h323/h323caps.h>


class H245_T38FaxProfile;
class OpalT38Protocol;



class H323_T38Capability : public H323DataCapability
{
    PCLASSINFO(H323_T38Capability, H323DataCapability);
  public:
    enum TransportMode {
      e_UDP,
      e_DualTCP,
      e_SingleTCP,
      NumTransportModes
    };

    H323_T38Capability(
      TransportMode mode
    );

    Comparison Compare(const PObject & obj) const;

    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 PBoolean OnSendingPDU(
      H245_DataApplicationCapability & pdu
    ) const;

    virtual PBoolean OnSendingPDU(
      H245_DataMode & pdu  
    ) const;

    virtual PBoolean OnSendingPDU(
      H245_DataProtocolCapability & proto,  
      H245_T38FaxProfile & profile          
    ) const;

    virtual PBoolean OnReceivedPDU(
      const H245_DataApplicationCapability & pdu  
    );

    TransportMode GetTransportMode() const { return mode; }

  protected:
    TransportMode mode;
};


class H323_T38NonStandardCapability : public H323NonStandardDataCapability
{
    PCLASSINFO(H323_T38NonStandardCapability, H323NonStandardDataCapability);
  public:
    H323_T38NonStandardCapability(
      BYTE country = 181,            
      BYTE extension = 0,            
      WORD maufacturer = 18          
    );

    virtual PObject * Clone() const;

    virtual PString GetFormatName() const;

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


class H323_T38Channel : public H323DataChannel
{
    PCLASSINFO(H323_T38Channel, H323DataChannel);
  public:
    H323_T38Channel(
      H323Connection & connection,       
      const H323Capability & capability, 
      Directions direction,              
      unsigned sessionID,                
      H323_T38Capability::TransportMode mode
    );
    ~H323_T38Channel();

    virtual PBoolean OnSendingPDU(
      H245_OpenLogicalChannel & openPDU  
    ) const;

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

    virtual void Close();

    virtual void Receive();

    virtual void Transmit();

    virtual PBoolean CreateListener();

    virtual PBoolean CreateTransport();

    OpalT38Protocol * GetHandler() const { return t38handler; }

  protected:
    PBoolean              usesTCP;
    OpalT38Protocol * t38handler;
};


#endif // __OPAL_H323T38_H

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