tcpdump.tproj/extract.h

   1 /*
   2  * Copyright (c) 1999 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * "Portions Copyright (c) 1999 Apple Computer, Inc.  All Rights
   7  * Reserved.  This file contains Original Code and/or Modifications of
   8  * Original Code as defined in and that are subject to the Apple Public
   9  * Source License Version 1.0 (the 'License').  You may not use this file
  10  * except in compliance with the License.  Please obtain a copy of the
  11  * License at http://www.apple.com/publicsource and read it before using
  12  * this file.
  13  *
  14  * The Original Code and all software distributed under the License are
  15  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  16  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  17  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  18  * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
  19  * License for the specific language governing rights and limitations
  20  * under the License."
  21  *
  22  * @APPLE_LICENSE_HEADER_END@
  23  */
  24 /*
  25  * Copyright (c) 1992, 1993, 1994, 1995, 1996
  26  *      The Regents of the University of California.  All rights reserved.
  27  *
  28  * Redistribution and use in source and binary forms, with or without
  29  * modification, are permitted provided that: (1) source code distributions
  30  * retain the above copyright notice and this paragraph in its entirety, (2)
  31  * distributions including binary code include the above copyright notice and
  32  * this paragraph in its entirety in the documentation or other materials
  33  * provided with the distribution, and (3) all advertising materials mentioning
  34  * features or use of this software display the following acknowledgement:
  35  * ``This product includes software developed by the University of California,
  36  * Lawrence Berkeley Laboratory and its contributors.'' Neither the name of
  37  * the University nor the names of its contributors may be used to endorse
  38  * or promote products derived from this software without specific prior
  39  * written permission.
  40  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
  41  * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
  42  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
  43  *
  44  * @(#) $Header: /cvs/Darwin/Commands/NeXT/network_cmds/tcpdump.tproj/extract.h,v 1.1.1.1 1999/05/02 03:58:31 wsanchez Exp $ (LBL)
  45  */
  46
  47 /* Network to host order macros */
  48
  49 #ifdef LBL_ALIGN
  50 #define EXTRACT_16BITS(p) \
  51         ((u_short)*((u_char *)(p) + 0) << 8 | \
  52         (u_short)*((u_char *)(p) + 1))
  53 #define EXTRACT_32BITS(p) \
  54         ((u_int32_t)*((u_char *)(p) + 0) << 24 | \
  55         (u_int32_t)*((u_char *)(p) + 1) << 16 | \
  56         (u_int32_t)*((u_char *)(p) + 2) << 8 | \
  57         (u_int32_t)*((u_char *)(p) + 3))
  58 #else
  59 #define EXTRACT_16BITS(p) \
  60         ((u_short)ntohs(*(u_short *)(p)))
  61 #define EXTRACT_32BITS(p) \
  62         ((u_int32_t)ntohl(*(u_int32_t *)(p)))
  63 #endif
  64
  65 #define EXTRACT_24BITS(p) \
  66         ((u_int32_t)*((u_char *)(p) + 0) << 16 | \
  67         (u_int32_t)*((u_char *)(p) + 1) << 8 | \
  68         (u_int32_t)*((u_char *)(p) + 2))
  69
  70 /* Little endian protocol host order macros */
  71
  72 #define EXTRACT_LE_8BITS(p) (*(p))
  73 #define EXTRACT_LE_16BITS(p) \
  74         ((u_short)*((u_char *)(p) + 1) << 8 | \
  75         (u_short)*((u_char *)(p) + 0))
  76 #define EXTRACT_LE_32BITS(p) \
  77         ((u_int32_t)*((u_char *)(p) + 3) << 24 | \
  78         (u_int32_t)*((u_char *)(p) + 2) << 16 | \
  79         (u_int32_t)*((u_char *)(p) + 1) << 8 | \
  80         (u_int32_t)*((u_char *)(p) + 0))