include/otto/packet.h

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// $Id: packet.h,v 1.6 2004/07/07 16:14:01 alpha Exp $
//
// Copyright (c) 1999-2004 Darius Rad
//
// This file is part of the OpenOtto project.
//
// OpenOtto is free software; you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation; either version 2 of the License, or
// (at your option) any later version.
//



#ifndef _OTTO_PACKET_H
#define _OTTO_PACKET_H


//#include <sae_j2178-1.h>
//#include <iso.h>


#define OTTO_PACKET_LENGTH_MAX 12


struct otto_funcadr_sec_adr
{

  unsigned char id:6;

  unsigned char c:1;

  unsigned char q:1;
};

struct otto_funcadr_ext_adr
{
  enum
  {
    OTTO_EXTADR_COL_ALL = 0,  
    OTTO_EXTADR_COL_LEFTSIDE = 1,  
    OTTO_EXTADR_COL_DRIVER = 2,  
    OTTO_EXTADR_COL_LEFTCENTER = 3,  
    OTTO_EXTADR_COL_CENTER = 4,  
    OTTO_EXTADR_COL_RIGHTCENTER = 5,  
    OTTO_EXTADR_COL_PASSENGER = 6,  
    OTTO_EXTADR_COL_RIGHTSIDE = 7,  
  }
  col:3;

  enum
  {
    OTTO_EXTADR_ROW_ALL = 0,  
    OTTO_EXTADR_ROW_FRONT = 1,  
    OTTO_EXTADR_ROW_HOOD = 2,  
    OTTO_EXTADR_ROW_BULKHEAD = 3,  
    OTTO_EXTADR_ROW_APILlAR = 4,  
    OTTO_EXTADR_ROW_MID = 5,  
    OTTO_EXTADR_ROW_TRUNK = 6,  
    OTTO_EXTADR_ROW_REAR = 7,  
  }
  row:3;

  enum
  {
    OTTO_EXTADR_TYPE_GEOGRAPHICAL = 0,  
    OTTO_EXTADR_TYPE_RESERVED_SAE = 1,  
    OTTO_EXTADR_TYPE_RESERVED_MFG_2 = 2,  
    OTTO_EXTADR_TYPE_RESERVED_MFG_3 = 3,  
  }
  rr:2;
};

union otto_funcadr_data
{
  struct
  {
  }
  fmt0;

  struct
  {
    unsigned char data[OTTO_PACKET_LENGTH_MAX-1];  
  }
  fmt1;

  struct
  {
    struct otto_funcadr_sec_adr sec_id;  
    unsigned char data[OTTO_PACKET_LENGTH_MAX-2];  
  }
  fmt2;

  struct
  {
    struct otto_funcadr_sec_adr sec_id;  
    struct otto_funcadr_ext_adr ext_id;  
    unsigned char data[OTTO_PACKET_LENGTH_MAX-3];  
  }
  fmt3;

  struct
  {
    unsigned char mode;  
    unsigned char data[OTTO_PACKET_LENGTH_MAX-2];  
  }
  fmt4;
};

union otto_phyadr_data
{
  struct
  {
  }
  fmt0;

  struct
  {
    unsigned char mode;  
    unsigned char data[OTTO_PACKET_LENGTH_MAX-2];  
  }
  fmt1;

  struct
  {
    unsigned char addr;  
    unsigned char mode;  
    unsigned char data[OTTO_PACKET_LENGTH_MAX-3];  
  }
  fmt2;
};

union otto_packet
{
  struct
  {
    unsigned char data[OTTO_PACKET_LENGTH_MAX];  
    int length;  
    unsigned char nb;  
  }
  raw;

  struct
  {
    unsigned char id;  
    unsigned char data[OTTO_PACKET_LENGTH_MAX-1];  
  }
  single;  

  union
  {
    struct 
    {
      unsigned char id_lo:4;

      enum
      {
        OTTO_PKTHDRCS_THREEBYTE = 0,  
        OTTO_PKTHDRCS_ONEBYTE = 1,  
      }
      h:1;

      unsigned char id_hi:3;
    }
    hdr;  

    struct
    {
      union otto_funcadr_data data;
    }
    func;

    struct
    {
      union otto_phyadr_data data;
    }
    phy;
  }
  consol1;  

  union
  {
    struct
    {
      unsigned char z:2;

      enum
      {
        OTTO_PKTHDR_FUNCTIONAL = 0,  
        OTTO_PKTHDR_PHYSICAL = 1,  
      }
      y:1;

      enum
      {
        OTTO_PKTHDR_IFRREQUIRED = 0,  
        OTTO_PKTHDR_IFRDISALLOWED = 1,  
      }
      k:1;

      enum
      {
        OTTO_PKTHDR_THREEBYTE = 0,  
        OTTO_PKTHDR_ONEBYTE = 1,  
      }
      h:1;

      unsigned char p:3;
    }
    first;  

    struct 
    {
      struct 
      {
        enum
        {
          OTTO_FUNCADR_TGTADR_COMMAND = 0,  
          OTTO_FUNCADR_TGTADR_STATUS = 1,  
        }
        w:1;

        unsigned char id:7;
      }
      target;  
      unsigned char source;  

      union otto_funcadr_data data;  
    }
    func;  

    struct
    {
      unsigned char target;  
      unsigned char source;  
      
      union otto_phyadr_data data;  
    }
    phy;  
  }
  consol3;  
};


int
otto_crc_calc(
  union otto_packet *pkt  
);


int
otto_crc_valid(
  union otto_packet *pkt  
);


int
otto_findpacket(
  union otto_packet *pkt,  
  int *start,  
  int *len  
);


#endif

---