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#include <sys/cdefs.h>
23#ifndef lint
24#if 0
25static const char rcsid[] _U_ =
26    "@(#) Header: /tcpdump/master/tcpdump/print-frag6.c,v 1.20 2005-04-20 22:33:06 guy Exp";
27#else
28__RCSID("$NetBSD$");
29#endif
30#endif
31
32#ifdef HAVE_CONFIG_H
33#include "config.h"
34#endif
35
36#ifdef INET6
37
38#include <tcpdump-stdinc.h>
39
40#include <stdio.h>
41
42#include "ip6.h"
43
44#include "interface.h"
45#include "addrtoname.h"
46#include "extract.h"
47
48int
49frag6_print(register const u_char *bp, register const u_char *bp2)
50{
51	register const struct ip6_frag *dp;
52	register const struct ip6_hdr *ip6;
53
54	dp = (const struct ip6_frag *)bp;
55	ip6 = (const struct ip6_hdr *)bp2;
56
57	TCHECK(dp->ip6f_offlg);
58
59	if (vflag) {
60		printf("frag (0x%08x:%d|%ld)",
61		       EXTRACT_32BITS(&dp->ip6f_ident),
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	} else {
66		printf("frag (%d|%ld)",
67		       EXTRACT_16BITS(&dp->ip6f_offlg) & IP6F_OFF_MASK,
68		       sizeof(struct ip6_hdr) + EXTRACT_16BITS(&ip6->ip6_plen) -
69			       (long)(bp - bp2) - sizeof(struct ip6_frag));
70	}
71
72#if 1
73	/* it is meaningless to decode non-first fragment */
74	if ((EXTRACT_16BITS(&dp->ip6f_offlg) & IP6F_OFF_MASK) != 0)
75		return -1;
76	else
77#endif
78	{
79		fputs(" ", stdout);
80		return sizeof(struct ip6_frag);
81	}
82trunc:
83	fputs("[|frag]", stdout);
84	return -1;
85#undef TCHECK
86}
87#endif /* INET6 */
88