1/*
2 * Copyright (c) 1988, 1989, 1990, 1991, 1993, 1994
3 *	The Regents of the University of California.  All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that: (1) source code distributions
7 * retain the above copyright notice and this paragraph in its entirety, (2)
8 * distributions including binary code include the above copyright notice and
9 * this paragraph in its entirety in the documentation or other materials
10 * provided with the distribution, and (3) all advertising materials mentioning
11 * features or use of this software display the following acknowledgement:
12 * ``This product includes software developed by the University of California,
13 * Lawrence Berkeley Laboratory and its contributors.'' Neither the name of
14 * the University nor the names of its contributors may be used to endorse
15 * or promote products derived from this software without specific prior
16 * written permission.
17 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
18 * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
19 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
20 */
21
22#ifndef lint
23static const char rcsid[] _U_ =
24    "@(#) $Header: /tcpdump/master/tcpdump/print-frag6.c,v 1.20 2005-04-20 22:33:06 guy Exp $";
25#endif
26
27#ifdef HAVE_CONFIG_H
28#include "config.h"
29#endif
30
31#ifdef INET6
32
33#include <tcpdump-stdinc.h>
34
35#include <stdio.h>
36
37#include "ip6.h"
38
39#include "interface.h"
40#include "addrtoname.h"
41#include "extract.h"
42
43int
44frag6_print(register const u_char *bp, register const u_char *bp2)
45{
46	register const struct ip6_frag *dp;
47	register const struct ip6_hdr *ip6;
48
49	dp = (const struct ip6_frag *)bp;
50	ip6 = (const struct ip6_hdr *)bp2;
51
52	TCHECK(dp->ip6f_offlg);
53
54	if (vflag) {
55		printf("frag (0x%08x:%d|%ld)",
56		       EXTRACT_32BITS(&dp->ip6f_ident),
57		       EXTRACT_16BITS(&dp->ip6f_offlg) & IP6F_OFF_MASK,
58		       sizeof(struct ip6_hdr) + EXTRACT_16BITS(&ip6->ip6_plen) -
59			       (long)(bp - bp2) - sizeof(struct ip6_frag));
60	} else {
61		printf("frag (%d|%ld)",
62		       EXTRACT_16BITS(&dp->ip6f_offlg) & IP6F_OFF_MASK,
63		       sizeof(struct ip6_hdr) + EXTRACT_16BITS(&ip6->ip6_plen) -
64			       (long)(bp - bp2) - sizeof(struct ip6_frag));
65	}
66
67#if 1
68	/* it is meaningless to decode non-first fragment */
69	if ((EXTRACT_16BITS(&dp->ip6f_offlg) & IP6F_OFF_MASK) != 0)
70		return -1;
71	else
72#endif
73	{
74		fputs(" ", stdout);
75		return sizeof(struct ip6_frag);
76	}
77trunc:
78	fputs("[|frag]", stdout);
79	return -1;
80#undef TCHECK
81}
82#endif /* INET6 */
83