print-ripng.c revision 56893 
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 1.2.2.1 2000/01/11 06:58:26 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#include <netinet/in.h>
39#include <netinet/in_systm.h>
40#include <netinet/ip.h>
41#include <netinet/ip_var.h>
42#include <netinet/udp.h>
43#include <netinet/udp_var.h>
44
45#include <errno.h>
46#include <stdio.h>
47
48#include <netinet/ip6.h>
49
50#include "route6d.h"
51#include "interface.h"
52#include "addrtoname.h"
53
54static int
55rip6_entry_print(register const struct netinfo6 *ni, int metric)
56{
57	int l;
58	l = printf("%s/%d", ip6addr_string(&ni->rip6_dest), ni->rip6_plen);
59	if (ni->rip6_tag)
60		l += printf(" [%d]", ntohs(ni->rip6_tag));
61	if (metric)
62		l += printf(" (%d)", ni->rip6_metric);
63	return l;
64}
65
66void
67ripng_print(const u_char *dat, int length)
68{
69	register const struct rip6 *rp = (struct rip6 *)dat;
70	register const struct netinfo6 *ni;
71	register int amt = snapend - dat;
72	register int i = min(length, amt) -
73			 (sizeof(struct rip6) - sizeof(struct netinfo6));
74	int j;
75	int trunc;
76
77	if (i < 0)
78		return;
79
80	switch (rp->rip6_cmd) {
81
82	case RIP6_REQUEST:
83		j = length / sizeof(*ni);
84		if (j == 1
85		    &&  rp->rip6_nets->rip6_metric == HOPCNT_INFINITY6
86		    &&  IN6_IS_ADDR_UNSPECIFIED(&rp->rip6_nets->rip6_dest)) {
87			printf(" ripng-req dump");
88			break;
89		}
90		if (j * sizeof(*ni) != length - 4)
91			printf(" ripng-req %d[%d]:", j, length);
92		else
93			printf(" ripng-req %d:", j);
94		trunc = ((i / sizeof(*ni)) * sizeof(*ni) != i);
95		for (ni = rp->rip6_nets; (i -= sizeof(*ni)) >= 0; ++ni) {
96			if (vflag)
97				printf("\n\t");
98			else
99				printf(" ");
100			rip6_entry_print(ni, 0);
101		}
102		break;
103	case RIP6_RESPONSE:
104		j = length / sizeof(*ni);
105		if (j * sizeof(*ni) != length - 4)
106			printf(" ripng-resp %d[%d]:", j, length);
107		else
108			printf(" ripng-resp %d:", j);
109		trunc = ((i / sizeof(*ni)) * sizeof(*ni) != i);
110		for (ni = rp->rip6_nets; (i -= sizeof(*ni)) >= 0; ++ni) {
111			if (vflag)
112				printf("\n\t");
113			else
114				printf(" ");
115			rip6_entry_print(ni, ni->rip6_metric);
116		}
117		if (trunc)
118			printf("[|rip]");
119		break;
120	default:
121		printf(" ripng-%d ?? %d", rp->rip6_cmd, length);
122		break;
123	}
124	if (rp->rip6_vers != RIP6_VERSION)
125		printf(" [vers %d]", rp->rip6_vers);
126}
127#endif /* INET6 */
128