openwrt/package/wificonf/include/proto/bcmip.h

   1 /*
   2  * Copyright 2005, Broadcom Corporation
   3  * All Rights Reserved.
   4  *
   5  * This is UNPUBLISHED PROPRIETARY SOURCE CODE of Broadcom Corporation;
   6  * the contents of this file may not be disclosed to third parties, copied
   7  * or duplicated in any form, in whole or in part, without the prior
   8  * written permission of Broadcom Corporation.
   9  *
  10  * Fundamental constants relating to IP Protocol
  11  *
  12  * $Id$
  13  */
  14
  15 #ifndef _bcmip_h_
  16 #define _bcmip_h_
  17
  18 /* IP header */
  19 #define IPV4_VERIHL_OFFSET      0       /* version and ihl byte offset */
  20 #define IPV4_TOS_OFFSET         1       /* TOS offset */
  21 #define IPV4_PROT_OFFSET        9       /* protocol type offset */
  22 #define IPV4_CHKSUM_OFFSET      10      /* IP header checksum offset */
  23 #define IPV4_SRC_IP_OFFSET      12      /* src IP addr offset */
  24 #define IPV4_DEST_IP_OFFSET     16      /* dest IP addr offset */
  25
  26 #define IPV4_VER_MASK   0xf0
  27 #define IPV4_IHL_MASK   0x0f
  28
  29 #define IPV4_PROT_UDP   17      /* UDP protocol type */
  30
  31 #define IPV4_ADDR_LEN   4       /* IP v4 address length */
  32
  33 #define IPV4_VER_NUM    0x40    /* IP v4 version number */
  34
  35 /* NULL IP address check */
  36 #define IPV4_ISNULLADDR(a)      ((((uint8 *)(a))[0] + ((uint8 *)(a))[1] + \
  37                                 ((uint8 *)(a))[2] + ((uint8 *)(a))[3]) == 0)
  38
  39 #define IPV4_ADDR_STR_LEN       16
  40
  41 #endif  /* #ifndef _bcmip_h_ */
  42