print-rt6.c revision 146773 
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 1.26 2003/11/19 00:36:08 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, register const u_char *bp2)
45{
46	register const struct ip6_rthdr *dp;
47	register const struct ip6_rthdr0 *dp0;
48	register const struct ip6_hdr *ip;
49	register const u_char *ep;
50	int i, len;
51	register const struct in6_addr *addr;
52
53	dp = (struct ip6_rthdr *)bp;
54	ip = (struct ip6_hdr *)bp2;
55	len = dp->ip6r_len;
56
57	/* 'ep' points to the end of available data. */
58	ep = snapend;
59
60	TCHECK(dp->ip6r_segleft);
61
62	printf("srcrt (len=%d", dp->ip6r_len);	/*)*/
63	printf(", type=%d", dp->ip6r_type);
64	printf(", segleft=%d", dp->ip6r_segleft);
65
66	switch (dp->ip6r_type) {
67#ifndef IPV6_RTHDR_TYPE_0
68#define IPV6_RTHDR_TYPE_0 0
69#endif
70#ifndef IPV6_RTHDR_TYPE_2
71#define IPV6_RTHDR_TYPE_2 2
72#endif
73	case IPV6_RTHDR_TYPE_0:
74	case IPV6_RTHDR_TYPE_2:			/* Mobile IPv6 ID-20 */
75		dp0 = (struct ip6_rthdr0 *)dp;
76
77		TCHECK(dp0->ip6r0_reserved);
78		if (dp0->ip6r0_reserved || vflag) {
79			printf(", rsv=0x%0x",
80			    EXTRACT_32BITS(&dp0->ip6r0_reserved));
81		}
82
83		if (len % 2 == 1)
84			goto trunc;
85		len >>= 1;
86		addr = &dp0->ip6r0_addr[0];
87		for (i = 0; i < len; i++) {
88			if ((u_char *)(addr + 1) > ep)
89				goto trunc;
90
91			printf(", [%d]%s", i, ip6addr_string(addr));
92			addr++;
93		}
94		/*(*/
95		printf(") ");
96		return((dp0->ip6r0_len + 1) << 3);
97		break;
98	default:
99		goto trunc;
100		break;
101	}
102
103 trunc:
104	fputs("[|srcrt]", stdout);
105	return -1;
106}
107#endif /* INET6 */
108