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-rt6.c,v 1.27 2005-04-20 22:34:57 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
44rt6_print(register const u_char *bp, const u_char *bp2 _U_)
45{
46	register const struct ip6_rthdr *dp;
47	register const struct ip6_rthdr0 *dp0;
48	register const u_char *ep;
49	int i, len;
50	register const struct in6_addr *addr;
51
52	dp = (struct ip6_rthdr *)bp;
53	len = dp->ip6r_len;
54
55	/* 'ep' points to the end of available data. */
56	ep = snapend;
57
58	TCHECK(dp->ip6r_segleft);
59
60	printf("srcrt (len=%d", dp->ip6r_len);	/*)*/
61	printf(", type=%d", dp->ip6r_type);
62	printf(", segleft=%d", dp->ip6r_segleft);
63
64	switch (dp->ip6r_type) {
65#ifndef IPV6_RTHDR_TYPE_0
66#define IPV6_RTHDR_TYPE_0 0
67#endif
68#ifndef IPV6_RTHDR_TYPE_2
69#define IPV6_RTHDR_TYPE_2 2
70#endif
71	case IPV6_RTHDR_TYPE_0:
72	case IPV6_RTHDR_TYPE_2:			/* Mobile IPv6 ID-20 */
73		dp0 = (struct ip6_rthdr0 *)dp;
74
75		TCHECK(dp0->ip6r0_reserved);
76		if (dp0->ip6r0_reserved || vflag) {
77			printf(", rsv=0x%0x",
78			    EXTRACT_32BITS(&dp0->ip6r0_reserved));
79		}
80
81		if (len % 2 == 1)
82			goto trunc;
83		len >>= 1;
84		addr = &dp0->ip6r0_addr[0];
85		for (i = 0; i < len; i++) {
86			if ((u_char *)(addr + 1) > ep)
87				goto trunc;
88
89			printf(", [%d]%s", i, ip6addr_string(addr));
90			addr++;
91		}
92		/*(*/
93		printf(") ");
94		return((dp0->ip6r0_len + 1) << 3);
95		break;
96	default:
97		goto trunc;
98		break;
99	}
100
101 trunc:
102	fputs("[|srcrt]", stdout);
103	return -1;
104}
105#endif /* INET6 */
106