58 lines
2.3 KiB
C
58 lines
2.3 KiB
C
/*
|
|
* Copyright (c) 1992, 1993, 1994, 1995, 1996
|
|
* The Regents of the University of California. All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that: (1) source code distributions
|
|
* retain the above copyright notice and this paragraph in its entirety, (2)
|
|
* distributions including binary code include the above copyright notice and
|
|
* this paragraph in its entirety in the documentation or other materials
|
|
* provided with the distribution, and (3) all advertising materials mentioning
|
|
* features or use of this software display the following acknowledgement:
|
|
* ``This product includes software developed by the University of California,
|
|
* Lawrence Berkeley Laboratory and its contributors.'' Neither the name of
|
|
* the University nor the names of its contributors may be used to endorse
|
|
* or promote products derived from this software without specific prior
|
|
* written permission.
|
|
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
|
|
* WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
|
|
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
|
|
*
|
|
* @(#) $Header: /tcpdump/master/tcpdump/extract.h,v 1.15.1.1 1999/10/07 23:47:10 mcr Exp $ (LBL)
|
|
*/
|
|
|
|
/* Network to host order macros */
|
|
|
|
#ifdef LBL_ALIGN
|
|
#define EXTRACT_16BITS(p) \
|
|
((u_short)*((u_char *)(p) + 0) << 8 | \
|
|
(u_short)*((u_char *)(p) + 1))
|
|
#define EXTRACT_32BITS(p) \
|
|
((u_int32_t)*((u_char *)(p) + 0) << 24 | \
|
|
(u_int32_t)*((u_char *)(p) + 1) << 16 | \
|
|
(u_int32_t)*((u_char *)(p) + 2) << 8 | \
|
|
(u_int32_t)*((u_char *)(p) + 3))
|
|
#else
|
|
#define EXTRACT_16BITS(p) \
|
|
((u_short)ntohs(*(u_short *)(p)))
|
|
#define EXTRACT_32BITS(p) \
|
|
((u_int32_t)ntohl(*(u_int32_t *)(p)))
|
|
#endif
|
|
|
|
#define EXTRACT_24BITS(p) \
|
|
((u_int32_t)*((u_char *)(p) + 0) << 16 | \
|
|
(u_int32_t)*((u_char *)(p) + 1) << 8 | \
|
|
(u_int32_t)*((u_char *)(p) + 2))
|
|
|
|
/* Little endian protocol host order macros */
|
|
|
|
#define EXTRACT_LE_8BITS(p) (*(p))
|
|
#define EXTRACT_LE_16BITS(p) \
|
|
((u_short)*((u_char *)(p) + 1) << 8 | \
|
|
(u_short)*((u_char *)(p) + 0))
|
|
#define EXTRACT_LE_32BITS(p) \
|
|
((u_int32_t)*((u_char *)(p) + 3) << 24 | \
|
|
(u_int32_t)*((u_char *)(p) + 2) << 16 | \
|
|
(u_int32_t)*((u_char *)(p) + 1) << 8 | \
|
|
(u_int32_t)*((u_char *)(p) + 0))
|