/***********************license start***************
 * Copyright (c) 2003-2010  Cavium Inc. (support@cavium.com). All rights
 * reserved.
 *
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are
 * met:
 *
 *   * Redistributions of source code must retain the above copyright
 *     notice, this list of conditions and the following disclaimer.
 *
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 *     copyright notice, this list of conditions and the following
 *     disclaimer in the documentation and/or other materials provided
 *     with the distribution.

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 *     its contributors may be used to endorse or promote products
 *     derived from this software without specific prior written
 *     permission.

 * This Software, including technical data, may be subject to U.S. export  control
 * laws, including the U.S. Export Administration Act and its  associated
 * regulations, and may be subject to export or import  regulations in other
 * countries.

 * TO THE MAXIMUM EXTENT PERMITTED BY LAW, THE SOFTWARE IS PROVIDED "AS IS"
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 ***********************license end**************************************/







/**
 * @file
 *
 * Cavium Inc. Internet Protocol (IP)
 *
 * Definitions for the Internet Protocol (IP) support.
 *
 * <hr>$Revision: 70030 $<hr>
 *
 */

#ifndef __CVMIP_H__
#define __CVMIP_H__


/*
 * IP protocol values (1 byte)
 *
 */
#define  CVMIP_PROTO_ICMP  1    /* Internet Control Message Protocol */
#define  CVMIP_PROTO_TCP   6    /* Transmission Control Protocol */
#define  CVMIP_PROTO_UDP  17    /* User Datagram Protocol */
#define  CVMIP_PROTO_ESP  50    /* Encapsulated Security Payload */
#define  CVMIP_PROTO_AH   51    /* Authentication Header */


/**
 * network packet header definitions
 * (originally from octane_hw.h)
 *
 */

/**
 * UDP Packet header
 */
typedef struct {
   union {
      int32_t           s32     ;
      uint32_t          u32     ;
      struct {
         uint16_t        src_prt ;
         uint16_t        dst_prt ;
      } s;
   } prts;
   uint16_t            len     ;
   uint16_t            chksum  ;
} cvmip_udp_hdr_t;

/**
 * TCP Packet header
 */
typedef struct {
   uint16_t            src_prt ;
   uint16_t            dst_prt ;
   uint32_t            seq     ;
   uint32_t            ack_seq ;
   uint32_t            hlen    :4;
   uint32_t            rsvd    :6;
   uint32_t            urg     :1;
   uint32_t            ack     :1;
   uint32_t            psh     :1;
   uint32_t            rst     :1;
   uint32_t            syn     :1;
   uint32_t            fin     :1;
   uint16_t            win_sz  ;
   uint16_t            chksum  ;
   uint16_t            urg_ptr ;
   uint32_t            junk    ;
} cvmip_tcp_hdr_t;

/**
 * L4 Packet header
 */
typedef union {
   cvmip_udp_hdr_t udphdr;
   cvmip_tcp_hdr_t tcphdr;
   struct {
      union {
         int32_t           s32    ;
         uint32_t          u32    ;
         struct {
            uint16_t        src_prt;
            uint16_t        dst_prt;
         } s;
      } prts;
      uint16_t            len     ;
      uint16_t            chksum  ;
      char              dat[48] ; // 48 for IPv6 with no extension hdrs, 64 for IPv4 without options
   } udp;
   struct {
      uint16_t            src_prt ;
      uint16_t            dst_prt ;
      uint32_t            seq     ;
      uint32_t            ack_seq ;
      uint32_t            hlen    :4;
      uint32_t            rsvd    :6;
      uint32_t            urg     :1;
      uint32_t            ack     :1;
      uint32_t            psh     :1;
      uint32_t            rst     :1;
      uint32_t            syn     :1;
      uint32_t            fin     :1;
      uint16_t            win_sz  ;
      uint16_t            chksum  ;
      uint16_t            urg_ptr ;
      char              dat[36] ; // 36 for IPv6 with no extension hdrs, 52 for IPv6 without options
   } tcp;
} cvmip_l4_info_t;

/**
 * Special struct to add a pad to IPv4 header
 */
typedef struct {
   uint32_t            pad;

   uint32_t            version : 4;
   uint32_t            hl      : 4;
   uint8_t             tos     ;
   uint16_t            len     ;

   uint16_t            id      ;
   uint32_t            mbz     : 1;
   uint32_t            df      : 1;
   uint32_t            mf      : 1;
   uint32_t            off     :13;

   uint8_t             ttl     ;
   uint8_t             protocol;
   uint16_t            chksum  ;

   union {
      uint64_t          u64;
      struct {
         uint32_t        src;
         uint32_t        dst;
      } s;
   } src_dst;
} cvmip_ipv4_hdr_t;

/**
 * IPv6 Packet header
 */
typedef struct {

   uint32_t            version : 4;
   uint32_t            v6class : 8;
   uint32_t            flow    :20;

   uint16_t            len     ;    // includes extension headers plus payload (add 40 to be equiv to v4 len field)
   uint8_t             next_hdr;    // equivalent to the v4 protocol field
   uint8_t             hop_lim ;    // equivalent to the v4 TTL field

   union {
      uint64_t          u64[4];
      struct {
         uint64_t        src[2];
         uint64_t        dst[2];
      } s;
   } src_dst;

} cvmip_ipv6_hdr_t;


#endif /* __CVMIP_H__ */