qprotocol.h

      //  $Id: qprotocol.h,v 2.2 2002/05/18 22:03:13 vickery Exp $
      
      /*  Constants and types used for the rsh client/server project.
       *  CS-701, Spring 2002.
       *
       *  $Log: qprotocol.h,v $
       *  Revision 2.2  2002/05/18 22:03:13  vickery
       *  I had the constant values for SC_xxxx wrong, and fixed them.
       *  Addes a translation table and inline function for translating
       *  message types to strings, for use during debugging.
       *
       *  Revision 2.1  2002/05/06 06:28:49  vickery
       *  Initial version.
       *
       */
      #ifndef __QPROTOCOL_H__
      #define __QPROTOCOL_H__
      
      #include <netinet/in.h>
      
      //  Typedefs and structs
      //  ------------------------------------------------------------------
      #include <stdlib.h>
      #include <sys/types.h>
      
      #ifndef int32_t
      typedef int int32_t;
      #endif
      
      struct msg_header_t
      {
        int32_t msg_length;
        int32_t msg_type;
      };
      
      //  Protocol Message Type Codes
      //  ------------------------------------------------------------------
      static const int32_t  CS_SHUT     = 101;
      static const int32_t  CS_EXIT     = 102;
      static const int32_t  CS_USER     = 103;
      static const int32_t  CS_CMD      = 104;
      static const int32_t  CS_STDIN    = 105;
      
      static const int32_t  SC_SHUT     = 201;
      static const int32_t  SC_LOGIN    = 202;
      static const int32_t  SC_DENY     = 203;
      static const int32_t  SC_PROMPT   = 204;
      static const int32_t  SC_STDOUT   = 205;
      static const int32_t  SC_STDERR   = 206;
      
      //  Type codes <--> Strings
      //  (For Debugging)
      //  ------------------------------------------------------------------
      struct type_name_t
      {
        const char    *name;
        const int32_t type;
      };
      static type_name_t type_name_list[] =
      {
        { "CS_SHUT",    101 },
        { "CS_EXIT",    102 },
        { "CS_USER",    103 },
        { "CS_CMD",     104 },
        { "CS_STDIN",   105 },
        { "SC_SHUT",    201 },
        { "SC_LOGIN",   202 },
        { "SC_DENY",    203 },
        { "SC_PROMPT",  204 },
        { "SC_STDOUT",  205 },
        { "SC_STDERR",  206 },
      };
      static const int num_names = 
                           sizeof( type_name_list ) / sizeof( type_name_t );
      inline const char *type_name( int type_code )
      {
        for (int i = 0; i < num_names; i++ )
        {
          if ( type_code == type_name_list[i].type )
            return type_name_list[i].name;
        }
        return "Unknown Message Type";
      }
      #endif