/****************************************************************************
 *
 *  Copyright (C) 2000-2001 RealNetworks, Inc. All rights reserved.
 *
 *  This program is free software.  It may be distributed under the terms
 *  in the file LICENSE, found in the top level of the source distribution.
 *
 */

#ifndef _TRAN_H
#define _TRAN_H

#include "types.h"
#include "pkt.h"

// Response for data transports
class CTransportResponse
{
public:
    virtual void OnPacket( CPacket* ppkt ) = 0;
};

// Virtual base class for all data transports
class CTransport
{
private: // Unimplemented
    CTransport( const CTransport& );
    CTransport& operator=( const CTransport& );

public:
    enum Type {
        ttNONE =  0,
        ttNULL =  1,
        ttRDT  =  2,
        ttRTP  =  4,
        ttPNG  =  8,
        ttALL  = 15
    };
    enum Layer {
        ltNONE  =  0,
        ltNULL  =  1,
        ltMCAST =  2,
        ltUDP   =  4,
        ltTCP   =  8,
        ltALL   = 15
    };

protected:
    CTransport( void );
    CTransport( CTransportResponse* pResponse, Type tt, Layer lt );

public:
    virtual ~CTransport( void );

    virtual void SendPacket( UINT chan, CPacket* ppkt ) = 0;

protected:
    CTransportResponse* m_pResponse;
    Type                m_type;
    Layer               m_layer;
};

#endif //ndef _TRAN_H