/***********************************************************************
 * 
 *  Copyright (C) 2006 Novell, Inc. All Rights Reserved.
 *
 *  This library is free software; you can redistribute it and/or
 *  modify it under the terms of the GNU Lesser General Public
 *  License as published by the Free Software Foundation; version 2.1
 *  of the License.
 *
 *  This library is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 *  Library Lesser General Public License for more details.
 *
 *  You should have received a copy of the GNU Lesser General Public
 *  License along with this library; if not, Novell, Inc.
 * 
 *  To contact Novell about this file by physical or electronic mail, 
 *  you may find current contact information at www.novell.com.
 * 
 *  Author: Juan Carlos Luciani <jluciani@novell.com>
 *
 ***********************************************************************/

#ifndef _CHANNELPROTO_
#define _CHANNELPROTO_

//===[ Include files ]=====================================================

//===[ External data ]=====================================================

extern string ReqDataPktHdrTemplate;
extern string ReqErrorPktHdrTemplate;

//===[ External prototypes ]===============================================

//===[ Manifest constants ]================================================

//===[ Type definitions ]==================================================

//===[ Function prototypes ]===============================================

//===[ Global variables ]==================================================

//===[ Type definitions ]==================================================

//
// ChannelProto Class Definition
//
class ChannelProto
{
public:

   // Packet Types
   enum PacketTypes
   {
      ReqDataCarrierPacketType = 1,
      ReqErrorCarrierPacketType,
      UnknownPacketType
   };

   //
   // Build Req Data Packet Header routine
   //
   // Parameters:
   //    reqId (input) -
   //       Req id.
   //
   //    payloadLength (input) -
   //       Length of the payload being carried by the packet.
   //
   //    pPktHdt (input/output) -
   //       Pointer to buffer that will receive the header.
   //       Note, this buffer needs to be big eneough to
   //       contain the ReqDataPktHdrTemplate string.
   //
   // Abstract: Returns Req Data Pkt Hdr for the specified
   //           parameters.
   //
   // Returns: 0 if successful.
   //
   static int buildReqDataPktHdr(uint32_t reqId,
                                 int32_t payloadLength,
                                 char *pPktHdr);

   //
   // Build Req Error Packet Header routine
   //
   // Parameters:
   //    reqId (input) -
   //       Req id.
   //
   //    payloadLength (input) -
   //       Length of the payload being carried by the packet.
   //
   //    pPktHdt (input/output) -
   //       Pointer to buffer that will receive the header.
   //       Note, this buffer needs to be big eneough to
   //       contain the ReqErrorPktHdrTemplate string.
   //
   // Abstract: Returns Req Error Pkt Hdr for the specified
   //           parameters.
   //
   // Returns: 0 if successful.
   //
   static int buildReqErrorPktHdr(uint32_t reqId,
                                  int32_t payloadLength,
                                  char *pPktHdr);

   //
   // Get Channel Packet Type routine
   //
   // Parameters:
   //    buff (input) -
   //       Reference to buffer containing the packet data.
   //
   // Abstract: Returns the type of the specified channel packet.
   //
   // Returns: Channel packet type.
   //
   static PacketTypes getPktType(char &buff);

   //
   // Get Req Id and Payload Length Values routine
   //
   // Parameters:
   //    buff (input) -
   //       Reference to buffer  containing the packet data.
   //
   //    hdrLength (input) -
   //       Length of the channel header.
   //
   //    pReqId (input/output) -
   //       Pointer to variable that will receive the req id.
   //
   //    pPayloadLength (input/output) -
   //       Pointer to variable that will receive the payload length.
   //
   // Abstract: Returns the values of the ReqId and PayloadLength headers
   //           present in the channel packet header.
   //
   // Returns: True if successful.
   //
   static bool getReqIdAndPayloadLength(char *pBuff,
                                        int hdrLength,
                                        uint32_t *pReqId,
                                        int32_t *pPayloadLength);
};


//===[ Function prototypes ]===============================================


#endif // _CHANNELPROTO_

//=========================================================================
//=========================================================================