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-rt6.c,v 1.27 2005-04-20 22:34:57 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
49rt6_print(register const u_char *bp, const u_char *bp2 _U_)
50{
51	register const struct ip6_rthdr *dp;
52	register const struct ip6_rthdr0 *dp0;
53	register const u_char *ep;
54	int i, len;
55	register const struct in6_addr *addr;
56
57	dp = (struct ip6_rthdr *)bp;
58	len = dp->ip6r_len;
59
60	/* 'ep' points to the end of available data. */
61	ep = snapend;
62
63	TCHECK(dp->ip6r_segleft);
64
65	printf("srcrt (len=%d", dp->ip6r_len);	/*)*/
66	printf(", type=%d", dp->ip6r_type);
67	printf(", segleft=%d", dp->ip6r_segleft);
68
69	switch (dp->ip6r_type) {
70#ifndef IPV6_RTHDR_TYPE_0
71#define IPV6_RTHDR_TYPE_0 0
72#endif
73#ifndef IPV6_RTHDR_TYPE_2
74#define IPV6_RTHDR_TYPE_2 2
75#endif
76	case IPV6_RTHDR_TYPE_0:
77	case IPV6_RTHDR_TYPE_2:			/* Mobile IPv6 ID-20 */
78		dp0 = (struct ip6_rthdr0 *)dp;
79
80		TCHECK(dp0->ip6r0_reserved);
81		if (dp0->ip6r0_reserved || vflag) {
82			printf(", rsv=0x%0x",
83			    EXTRACT_32BITS(&dp0->ip6r0_reserved));
84		}
85
86		if (len % 2 == 1)
87			goto trunc;
88		len >>= 1;
89		addr = &dp0->ip6r0_addr[0];
90		for (i = 0; i < len; i++) {
91			if ((u_char *)(addr + 1) > ep)
92				goto trunc;
93
94			printf(", [%d]%s", i, ip6addr_string(addr));
95			addr++;
96		}
97		/*(*/
98		printf(") ");
99		return((dp0->ip6r0_len + 1) << 3);
100		break;
101	default:
102		goto trunc;
103		break;
104	}
105
106 trunc:
107	fputs("[|srcrt]", stdout);
108	return -1;
109}
110#endif /* INET6 */
111