print-rt6.c revision 98524 
1167050Smjacob/*
2167050Smjacob * Copyright (c) 1988, 1989, 1990, 1991, 1993, 1994
3298107Sgjb *	The Regents of the University of California.  All rights reserved.
4167050Smjacob *
5167050Smjacob * Redistribution and use in source and binary forms, with or without
6216468Sobrien * modification, are permitted provided that: (1) source code distributions
7167050Smjacob * retain the above copyright notice and this paragraph in its entirety, (2)
8167050Smjacob * distributions including binary code include the above copyright notice and
9216468Sobrien * this paragraph in its entirety in the documentation or other materials
10216468Sobrien * 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[] =
24    "@(#) $Header: /tcpdump/master/tcpdump/print-rt6.c,v 1.18 2001/06/15 22:17:34 fenner Exp $";
25#endif
26
27#ifdef HAVE_CONFIG_H
28#include "config.h"
29#endif
30
31#ifdef INET6
32
33#include <sys/param.h>
34#include <sys/time.h>
35#include <sys/types.h>
36#include <sys/socket.h>
37
38
39#include <netinet/in.h>
40
41#include <stdio.h>
42
43#include "ip6.h"
44
45#include "interface.h"
46#include "addrtoname.h"
47
48int
49rt6_print(register const u_char *bp, register const u_char *bp2)
50{
51	register const struct ip6_rthdr *dp;
52	register const struct ip6_rthdr0 *dp0;
53	register const struct ip6_hdr *ip;
54	register const u_char *ep;
55	int i, len;
56	register const struct in6_addr *addr;
57
58	dp = (struct ip6_rthdr *)bp;
59	ip = (struct ip6_hdr *)bp2;
60	len = dp->ip6r_len;
61
62	/* 'ep' points to the end of available data. */
63	ep = snapend;
64
65	TCHECK(dp->ip6r_segleft);
66
67	printf("srcrt (len=%d", dp->ip6r_len);	/*)*/
68	printf(", type=%d", dp->ip6r_type);
69	printf(", segleft=%d", dp->ip6r_segleft);
70
71	switch (dp->ip6r_type) {
72#ifndef IPV6_RTHDR_TYPE_0
73#define IPV6_RTHDR_TYPE_0 0
74#endif
75	case IPV6_RTHDR_TYPE_0:
76		dp0 = (struct ip6_rthdr0 *)dp;
77
78		TCHECK(dp0->ip6r0_reserved);
79		if (dp0->ip6r0_reserved || vflag) {
80			printf(", rsv=0x%0x",
81			    (u_int32_t)ntohl(dp0->ip6r0_reserved));
82		}
83
84		if (len % 2 == 1)
85			goto trunc;
86		len >>= 1;
87		addr = &dp0->ip6r0_addr[0];
88		for (i = 0; i < len; i++) {
89			if ((u_char *)(addr + 1) > ep)
90				goto trunc;
91
92			printf(", [%d]%s", i, ip6addr_string(addr));
93			addr++;
94		}
95		/*(*/
96		printf(") ");
97		return((dp0->ip6r0_len + 1) << 3);
98		break;
99	default:
100		goto trunc;
101		break;
102	}
103
104 trunc:
105	fputs("[|srcrt]", stdout);
106	return 65535;		/* XXX */
107}
108#endif /* INET6 */
109