1/*	NetBSD: print-ah.c,v 1.4 1996/05/20 00:41:16 fvdl Exp 	*/
2
3/*
4 * Copyright (c) 1988, 1989, 1990, 1991, 1992, 1993, 1994
5 *	The Regents of the University of California.  All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that: (1) source code distributions
9 * retain the above copyright notice and this paragraph in its entirety, (2)
10 * distributions including binary code include the above copyright notice and
11 * this paragraph in its entirety in the documentation or other materials
12 * provided with the distribution, and (3) all advertising materials mentioning
13 * features or use of this software display the following acknowledgement:
14 * ``This product includes software developed by the University of California,
15 * Lawrence Berkeley Laboratory and its contributors.'' Neither the name of
16 * the University nor the names of its contributors may be used to endorse
17 * or promote products derived from this software without specific prior
18 * written permission.
19 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
20 * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
21 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
22 */
23
24#include <sys/cdefs.h>
25#ifndef lint
26#if 0
27static const char rcsid[] _U_ =
28    "@(#) Header: /tcpdump/master/tcpdump/print-ah.c,v 1.22 2003-11-19 00:36:06 guy Exp (LBL)";
29#else
30__RCSID("$NetBSD: print-ah.c,v 1.2 2010/12/05 05:11:30 christos Exp $");
31#endif
32#endif
33
34#ifdef HAVE_CONFIG_H
35#include "config.h"
36#endif
37
38#include <tcpdump-stdinc.h>
39
40#include <stdio.h>
41
42#include "ah.h"
43
44#include "interface.h"
45#include "addrtoname.h"
46#include "extract.h"
47
48int
49ah_print(register const u_char *bp)
50{
51	register const struct ah *ah;
52	register const u_char *ep;
53	int sumlen;
54	u_int32_t spi;
55
56	ah = (const struct ah *)bp;
57	ep = snapend;		/* 'ep' points to the end of available data. */
58
59	TCHECK(*ah);
60
61	sumlen = ah->ah_len << 2;
62	spi = EXTRACT_32BITS(&ah->ah_spi);
63
64	printf("AH(spi=0x%08x", spi);
65	if (vflag)
66		printf(",sumlen=%d", sumlen);
67	printf(",seq=0x%x", EXTRACT_32BITS(ah + 1));
68	if (bp + sizeof(struct ah) + sumlen > ep)
69		fputs("[truncated]", stdout);
70	fputs("): ", stdout);
71
72	return sizeof(struct ah) + sumlen;
73 trunc:
74	fputs("[|AH]", stdout);
75	return -1;
76}
77