rip6query.c revision 162489 
1/*	$KAME: rip6query.c,v 1.11 2001/05/08 04:36:37 itojun Exp $	*/
2
3/*
4 * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 *    notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 *    notice, this list of conditions and the following disclaimer in the
14 *    documentation and/or other materials provided with the distribution.
15 * 3. Neither the name of the project nor the names of its contributors
16 *    may be used to endorse or promote products derived from this software
17 *    without specific prior written permission.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED.  IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 * SUCH DAMAGE.
30 *
31 * $FreeBSD: head/usr.sbin/rip6query/rip6query.c 162489 2006-09-21 01:41:03Z kan $
32 */
33
34#include <stdio.h>
35
36#include <unistd.h>
37#include <stdlib.h>
38#include <string.h>
39#include <ctype.h>
40#include <signal.h>
41#include <errno.h>
42#include <err.h>
43
44#include <sys/types.h>
45#include <sys/socket.h>
46#include <sys/queue.h>
47
48#include <net/if.h>
49#if defined(__FreeBSD__) && __FreeBSD__ >= 3
50#include <net/if_var.h>
51#endif /* __FreeBSD__ >= 3 */
52#include <netinet/in.h>
53#include <netinet/in_var.h>
54#include <arpa/inet.h>
55#include <netdb.h>
56
57#include "route6d.h"
58
59int	s;
60struct sockaddr_in6 sin6;
61struct rip6	*ripbuf;
62
63#define	RIPSIZE(n)	(sizeof(struct rip6) + (n-1) * sizeof(struct netinfo6))
64
65int main __P((int, char **));
66static void usage __P((void));
67static const char *sa_n2a __P((struct sockaddr *));
68static const char *inet6_n2a __P((struct in6_addr *));
69
70int
71main(argc, argv)
72	int argc;
73	char **argv;
74{
75	struct netinfo6 *np;
76	struct sockaddr_in6 fsock;
77	int i, n, len;
78	int c;
79	int ifidx = -1;
80	int error;
81	socklen_t flen;
82	char pbuf[10];
83	struct addrinfo hints, *res;
84
85	while ((c = getopt(argc, argv, "I:")) != -1) {
86		switch (c) {
87		case 'I':
88			ifidx = if_nametoindex(optarg);
89			if (ifidx == 0) {
90				errx(1, "invalid interface %s", optarg);
91				/*NOTREACHED*/
92			}
93			break;
94		default:
95			usage();
96			exit(1);
97			/*NOTREACHED*/
98		}
99	}
100	argv += optind;
101	argc -= optind;
102
103	if (argc != 1) {
104		usage();
105		exit(1);
106	}
107
108	if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0) {
109		err(1, "socket");
110		/*NOTREACHED*/
111	}
112
113	/* getaddrinfo is preferred for addr@ifname syntax */
114	snprintf(pbuf, sizeof(pbuf), "%d", RIP6_PORT);
115	memset(&hints, 0, sizeof(hints));
116	hints.ai_family = AF_INET6;
117	hints.ai_socktype = SOCK_DGRAM;
118	error = getaddrinfo(argv[0], pbuf, &hints, &res);
119	if (error) {
120		errx(1, "%s: %s", argv[0], gai_strerror(error));
121		/*NOTREACHED*/
122	}
123	if (res->ai_next) {
124		errx(1, "%s: %s", argv[0], "resolved to multiple addrs");
125		/*NOTREACHED*/
126	}
127	if (sizeof(sin6) != res->ai_addrlen) {
128		errx(1, "%s: %s", argv[0], "invalid addrlen");
129		/*NOTREACHED*/
130	}
131	memcpy(&sin6, res->ai_addr, res->ai_addrlen);
132	if (ifidx >= 0)
133		sin6.sin6_scope_id = ifidx;
134
135	if ((ripbuf = (struct rip6 *)malloc(BUFSIZ)) == NULL) {
136		err(1, "malloc");
137		/*NOTREACHED*/
138	}
139	ripbuf->rip6_cmd = RIP6_REQUEST;
140	ripbuf->rip6_vers = RIP6_VERSION;
141	ripbuf->rip6_res1[0] = 0;
142	ripbuf->rip6_res1[1] = 0;
143	np = ripbuf->rip6_nets;
144	bzero(&np->rip6_dest, sizeof(struct in6_addr));
145	np->rip6_tag = 0;
146	np->rip6_plen = 0;
147	np->rip6_metric = HOPCNT_INFINITY6;
148	if (sendto(s, ripbuf, RIPSIZE(1), 0, (struct sockaddr *)&sin6,
149			sizeof(struct sockaddr_in6)) < 0) {
150		err(1, "send");
151		/*NOTREACHED*/
152	}
153	do {
154		flen = sizeof(fsock);
155		if ((len = recvfrom(s, ripbuf, BUFSIZ, 0,
156				(struct sockaddr *)&fsock, &flen)) < 0) {
157			err(1, "recvfrom");
158			/*NOTREACHED*/
159		}
160		printf("Response from %s len %d\n",
161			sa_n2a((struct sockaddr *)&fsock), len);
162		n = (len - sizeof(struct rip6) + sizeof(struct netinfo6)) /
163			sizeof(struct netinfo6);
164		np = ripbuf->rip6_nets;
165		for (i = 0; i < n; i++, np++) {
166			printf("\t%s/%d [%d]", inet6_n2a(&np->rip6_dest),
167				np->rip6_plen, np->rip6_metric);
168			if (np->rip6_tag)
169				printf(" tag=0x%x", ntohs(np->rip6_tag));
170			printf("\n");
171		}
172	} while (len == RIPSIZE(24));
173
174	exit(0);
175}
176
177static void
178usage()
179{
180	fprintf(stderr, "usage: rip6query [-I iface] address\n");
181}
182
183/* getnameinfo() is preferred as we may be able to show ifindex as ifname */
184static const char *
185sa_n2a(sa)
186	struct sockaddr *sa;
187{
188	static char buf[NI_MAXHOST];
189
190	if (getnameinfo(sa, sa->sa_len, buf, sizeof(buf),
191			NULL, 0, NI_NUMERICHOST) != 0) {
192		snprintf(buf, sizeof(buf), "%s", "(invalid)");
193	}
194	return buf;
195}
196
197static const char *
198inet6_n2a(addr)
199	struct in6_addr *addr;
200{
201	static char buf[NI_MAXHOST];
202
203	return inet_ntop(AF_INET6, addr, buf, sizeof(buf));
204}
205