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#ifndef lint
25static const char rcsid[] _U_ =
26    "@(#) $Header: /tcpdump/master/tcpdump/print-ah.c,v 1.22 2003-11-19 00:36:06 guy Exp $ (LBL)";
27#endif
28
29#ifdef HAVE_CONFIG_H
30#include "config.h"
31#endif
32
33#include <tcpdump-stdinc.h>
34
35#include <stdio.h>
36
37#include "ah.h"
38
39#include "interface.h"
40#include "addrtoname.h"
41#include "extract.h"
42
43int
44ah_print(register const u_char *bp)
45{
46	register const struct ah *ah;
47	register const u_char *ep;
48	int sumlen;
49	u_int32_t spi;
50
51	ah = (const struct ah *)bp;
52	ep = snapend;		/* 'ep' points to the end of available data. */
53
54	TCHECK(*ah);
55
56	sumlen = ah->ah_len << 2;
57	spi = EXTRACT_32BITS(&ah->ah_spi);
58
59	printf("AH(spi=0x%08x", spi);
60	if (vflag)
61		printf(",sumlen=%d", sumlen);
62	printf(",seq=0x%x", EXTRACT_32BITS(ah + 1));
63	if (bp + sizeof(struct ah) + sumlen > ep)
64		fputs("[truncated]", stdout);
65	fputs("): ", stdout);
66
67	return sizeof(struct ah) + sumlen;
68 trunc:
69	fputs("[|AH]", stdout);
70	return -1;
71}
72