print-ripng.c revision 98524 
1/*
2 * Copyright (c) 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[] =
24    "@(#) $Header: /tcpdump/master/tcpdump/print-ripng.c,v 1.10 2001/11/16 08:59:22 itojun 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#include <netinet/in.h>
39
40#include <errno.h>
41#include <stdio.h>
42
43#include "route6d.h"
44#include "interface.h"
45#include "addrtoname.h"
46
47static int
48rip6_entry_print(register const struct netinfo6 *ni, int metric)
49{
50	int l;
51	l = printf("%s/%d", ip6addr_string(&ni->rip6_dest), ni->rip6_plen);
52	if (ni->rip6_tag)
53		l += printf(" [%d]", ntohs(ni->rip6_tag));
54	if (metric)
55		l += printf(" (%d)", ni->rip6_metric);
56	return l;
57}
58
59void
60ripng_print(const u_char *dat, unsigned int length)
61{
62	register const struct rip6 *rp = (struct rip6 *)dat;
63	register const struct netinfo6 *ni;
64	register int amt = snapend - dat;
65	register int i = min(length, amt) -
66			 (sizeof(struct rip6) - sizeof(struct netinfo6));
67	int j;
68	int trunc;
69
70	if (i < 0)
71		return;
72
73	switch (rp->rip6_cmd) {
74
75	case RIP6_REQUEST:
76		j = length / sizeof(*ni);
77		if (j == 1
78		    &&  rp->rip6_nets->rip6_metric == HOPCNT_INFINITY6
79		    &&  IN6_IS_ADDR_UNSPECIFIED(&rp->rip6_nets->rip6_dest)) {
80			printf(" ripng-req dump");
81			break;
82		}
83		if (j * sizeof(*ni) != length - 4)
84			printf(" ripng-req %d[%u]:", j, length);
85		else
86			printf(" ripng-req %d:", j);
87		trunc = ((i / sizeof(*ni)) * sizeof(*ni) != i);
88		for (ni = rp->rip6_nets; (i -= sizeof(*ni)) >= 0; ++ni) {
89			if (vflag > 1)
90				printf("\n\t");
91			else
92				printf(" ");
93			rip6_entry_print(ni, 0);
94		}
95		break;
96	case RIP6_RESPONSE:
97		j = length / sizeof(*ni);
98		if (j * sizeof(*ni) != length - 4)
99			printf(" ripng-resp %d[%u]:", j, length);
100		else
101			printf(" ripng-resp %d:", j);
102		trunc = ((i / sizeof(*ni)) * sizeof(*ni) != i);
103		for (ni = rp->rip6_nets; (i -= sizeof(*ni)) >= 0; ++ni) {
104			if (vflag > 1)
105				printf("\n\t");
106			else
107				printf(" ");
108			rip6_entry_print(ni, ni->rip6_metric);
109		}
110		if (trunc)
111			printf("[|ripng]");
112		break;
113	default:
114		printf(" ripng-%d ?? %u", rp->rip6_cmd, length);
115		break;
116	}
117	if (rp->rip6_vers != RIP6_VERSION)
118		printf(" [vers %d]", rp->rip6_vers);
119}
120#endif /* INET6 */
121