rip6query.c revision 62752 
1/*
2 * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 *    notice, this list of conditions and the following disclaimer in the
12 *    documentation and/or other materials provided with the distribution.
13 * 3. Neither the name of the project nor the names of its contributors
14 *    may be used to endorse or promote products derived from this software
15 *    without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED.  IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
28 *
29 * $FreeBSD: head/usr.sbin/rip6query/rip6query.c 62752 2000-07-07 07:35:51Z kris $
30 */
31
32#include <stdio.h>
33
34#include <unistd.h>
35#include <stdlib.h>
36#include <string.h>
37#include <ctype.h>
38#include <signal.h>
39#include <errno.h>
40#include <err.h>
41
42#include <sys/types.h>
43#include <sys/socket.h>
44#include <net/if.h>
45#if defined(__FreeBSD__) && __FreeBSD__ >= 3
46#include <net/if_var.h>
47#endif /* __FreeBSD__ >= 3 */
48#include <netinet/in.h>
49#include <netinet/in_var.h>
50#include <arpa/inet.h>
51#include <netdb.h>
52
53#include "route6d.h"
54
55/* wrapper for KAME-special getnameinfo() */
56#ifndef NI_WITHSCOPEID
57#define NI_WITHSCOPEID	0
58#endif
59
60int	s;
61struct sockaddr_in6 sin6;
62struct rip6	*ripbuf;
63
64#define	RIPSIZE(n)	(sizeof(struct rip6) + (n-1) * sizeof(struct netinfo6))
65
66int main __P((int, char **));
67static void usage __P((void));
68static const char *sa_n2a __P((struct sockaddr *));
69static const char *inet6_n2a __P((struct in6_addr *));
70
71int
72main(argc, argv)
73	int argc;
74	char **argv;
75{
76	struct netinfo6 *np;
77	struct sockaddr_in6 fsock;
78	int i, n, len, flen;
79	int c;
80	int ifidx = -1;
81	int error;
82	char pbuf[10];
83	struct addrinfo hints, *res;
84
85	while ((c = getopt(argc, argv, "I:")) != EOF) {
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 | NI_WITHSCOPEID) != 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