xref: /openbsd/usr.sbin/tcpdump/extract.h (revision c15d59ed)
1*c15d59edSmickey /*	$OpenBSD: extract.h,v 1.4 1996/07/13 11:01:09 mickey Exp $	*/
2df930be7Sderaadt 
3df930be7Sderaadt /*
4*c15d59edSmickey  * Copyright (c) 1992, 1993, 1994, 1995, 1996
5df930be7Sderaadt  *	The Regents of the University of California.  All rights reserved.
6df930be7Sderaadt  *
7df930be7Sderaadt  * Redistribution and use in source and binary forms, with or without
8df930be7Sderaadt  * modification, are permitted provided that: (1) source code distributions
9df930be7Sderaadt  * retain the above copyright notice and this paragraph in its entirety, (2)
10df930be7Sderaadt  * distributions including binary code include the above copyright notice and
11df930be7Sderaadt  * this paragraph in its entirety in the documentation or other materials
12df930be7Sderaadt  * provided with the distribution, and (3) all advertising materials mentioning
13df930be7Sderaadt  * features or use of this software display the following acknowledgement:
14df930be7Sderaadt  * ``This product includes software developed by the University of California,
15df930be7Sderaadt  * Lawrence Berkeley Laboratory and its contributors.'' Neither the name of
16df930be7Sderaadt  * the University nor the names of its contributors may be used to endorse
17df930be7Sderaadt  * or promote products derived from this software without specific prior
18df930be7Sderaadt  * written permission.
19df930be7Sderaadt  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
20df930be7Sderaadt  * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
21df930be7Sderaadt  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
22df930be7Sderaadt  *
23*c15d59edSmickey  * @(#) Header: extract.h,v 1.12 96/06/20 18:48:42 leres Exp (LBL)
24df930be7Sderaadt  */
25df930be7Sderaadt 
26*c15d59edSmickey #ifdef LBL_ALIGN
27df930be7Sderaadt #define EXTRACT_SHORT(p)\
28df930be7Sderaadt 	((u_short)\
29*c15d59edSmickey 		((u_short)*((u_char *)(p)+0)<<8|\
30*c15d59edSmickey 		 (u_short)*((u_char *)(p)+1)<<0))
31df930be7Sderaadt #define EXTRACT_LONG(p)\
32*c15d59edSmickey 		((u_int32_t)*((u_char *)(p)+0)<<24|\
33*c15d59edSmickey 		 (u_int32_t)*((u_char *)(p)+1)<<16|\
34*c15d59edSmickey 		 (u_int32_t)*((u_char *)(p)+2)<<8|\
35*c15d59edSmickey 		 (u_int32_t)*((u_char *)(p)+3)<<0)
36df930be7Sderaadt #else
37*c15d59edSmickey #define EXTRACT_SHORT(p)	((u_short)ntohs(*(u_short *)(p)))
38*c15d59edSmickey #define EXTRACT_LONG(p)		(ntohl(*(u_int32_t *)(p)))
39df930be7Sderaadt #endif
40