print-ah.c revision 98524 
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[] =
26    "@(#) $Header: /tcpdump/master/tcpdump/print-ah.c,v 1.15 2001/09/17 21:57:54 fenner Exp $ (LBL)";
27#endif
28
29#ifdef HAVE_CONFIG_H
30#include "config.h"
31#endif
32
33#include <sys/param.h>
34#include <sys/time.h>
35#include <sys/types.h>
36#include <sys/socket.h>
37
38#include <netinet/in.h>
39
40#include <stdio.h>
41
42#include "ah.h"
43
44#include "interface.h"
45#include "addrtoname.h"
46
47int
48ah_print(register const u_char *bp, register const u_char *bp2)
49{
50	register const struct ah *ah;
51	register const u_char *ep;
52	int sumlen;
53	u_int32_t spi;
54
55	ah = (const struct ah *)bp;
56	ep = snapend;		/* 'ep' points to the end of available data. */
57
58	TCHECK(*ah);
59
60	sumlen = ah->ah_len << 2;
61	spi = (u_int32_t)ntohl(ah->ah_spi);
62
63	printf("AH(spi=0x%08x", spi);
64	if (vflag)
65		printf(",sumlen=%d", sumlen);
66	printf(",seq=0x%x", (u_int32_t)ntohl(*(const u_int32_t *)(ah + 1)));
67	if (bp + sizeof(struct ah) + sumlen > ep)
68		fputs("[truncated]", stdout);
69	fputs("): ", stdout);
70
71	return sizeof(struct ah) + sumlen;
72 trunc:
73	fputs("[|AH]", stdout);
74	return 65535;
75}
76