TCPIPComm.h

//*****************************************************************************
// project   : ANALYTICA Class Library
// part      : Communication class for simple TCP/IP
// file name : TCPIPComm.h
// version   : 1.2
// author    : Udo Weber
// platform  : MS VC++ 6.0
//
//-----------------------------------------------------------------------------
// Description:
// =============
// implementation of the class CTCPIPComm to encapsulate simple TCP/IP
// communications
// Contains the main part of the communication classes. Organizes the
// handling of the three lower classes CTCPIPCommConnect, CTCPIPCommRecv and
// CTCPIPCommSend.
//
//-----------------------------------------------------------------------------
// Revisionhistory:
// 03.07.2001 ASc  Initialize-Methode für abgeleitete Klassen
// 20.07.1998 UWe  Some bug fixes
// 20.04.1998 UWe  first version
//*****************************************************************************

#ifndef _TCPIPComm_h
#define _TCPIPComm_h

//---- includes ---------------------------------------------------------------

#include <winsock.h>

#include "TCPIPCommConnect.h"
#include "TCPIPCommSend.h"
#include "TCPIPCommReceive.h"


//---- defines/const ----------------------------------------------------------

#define MAX_DIF_ADDR    5   // Maximum of different local address

//---- enums ------------------------------------------------------------------


//---- structs ----------------------------------------------------------------


//---- classes ----------------------------------------------------------------

class CTCPIPComm : public CTCPIPCommReceive,
                   public CTCPIPCommSend,
                   public CTCPIPCommConnect
{
   // public part
public:

   CTCPIPComm( const short  TCPport,
               const char   *pIPAddress,
               const bool   PassiveConnection,
               const long   MaxSendDataLen,
               const long   MaxRecvDataLen );

   virtual ~CTCPIPComm();


   //
   // public operations
   //

   int GetLastSocketError( void ) const;


   bool IsConnected( void ) const;

   bool ConnectRequest( void );


   bool Send( const void  *pData,
              const long  DataLen );



   // protected part
protected:

   //
   // virtual callback functions
   //

   virtual void ConnectIndication( void ) = 0;

   virtual void DisconnectIndication( void ) = 0;

   CTCPIPComm( void );

   void Initialize( const short  TCPport,
                    const char   *pIPAddress,
                    const bool   PassiveConnection,
                    const long   MaxSendDataLen,
                    const long   MaxRecvDataLen );

   // private part
private:

   void ConInd( void );

   void DisInd( void );

   void RecvDisInd( void );

   void SendDisInd( void );



   // member definition
   int             m_LastSocketError;
   bool            m_PassiveConnection;
   bool            m_LineConnected;
   SOCKADDR_IN     m_RemoteAddr;
   SOCKET          m_PassiveSocket;
   
   bool            m_bInitialized;

   bool            m_bTerminating;

   static int      m_NumOfInstances;

   static bool     m_bArrayUsed[MAX_DIF_ADDR];
   static SOCKADDR_IN     m_ArrayRemoteAddr[MAX_DIF_ADDR];
   static SOCKET   m_ArrayPassiveSocket[MAX_DIF_ADDR];
};


//
// inline operations 
//

// get last socket error
inline int CTCPIPComm::GetLastSocketError( void ) const
{
   return m_LastSocketError;
}

// Returns connected state (TRUE/FALSE)
inline bool CTCPIPComm::IsConnected( void ) const
{
   return m_LineConnected;
}



#endif // _TCPIPComm_h

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