rip6query.c revision 55543 
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 55543 2000-01-07 10:02:43Z shin $
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 <err.h>
40
41#include <sys/types.h>
42#include <sys/socket.h>
43#include <net/if.h>
44#include <net/if_var.h>
45#include <netinet/in.h>
46#include <netinet/in_var.h>
47#include <arpa/inet.h>
48#include <netdb.h>
49
50#include "route6d.h"
51
52/* wrapper for KAME-special getnameinfo() */
53#ifndef NI_WITHSCOPEID
54#define	NI_WITHSCOPEID	0
55#endif
56
57int	s;
58extern int errno;
59struct sockaddr_in6 sin6;
60struct rip6	*ripbuf;
61
62#define	RIPSIZE(n)	(sizeof(struct rip6) + (n-1) * sizeof(struct netinfo6))
63
64int main __P((int, char **));
65static void usage __P((void));
66static const char *sa_n2a __P((struct sockaddr *));
67static const char *inet6_n2a __P((struct in6_addr *));
68
69int
70main(argc, argv)
71	int argc;
72	char **argv;
73{
74	struct netinfo6 *np;
75	struct sockaddr_in6 fsock;
76	int i, n, len, flen;
77	int c;
78	extern char *optarg;
79	extern int optind;
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_STREAM;
118	error = getaddrinfo(argv[0], pbuf, &hints, &res);
119	if (error) {
120		fprintf(stderr, "rip6query: %s: %s\n", argv[0],
121			gai_strerror(error));
122		if (error == EAI_SYSTEM)
123			errx(1, "%s", strerror(errno));
124		exit(1);
125		/*NOTREACHED*/
126	}
127	if (res->ai_next) {
128		errx(1, "%s: %s", argv[0], "resolved to multiple addrs");
129		/*NOTREACHED*/
130	}
131	if (sizeof(sin6) != res->ai_addrlen) {
132		errx(1, "%s: %s", argv[0], "invalid addrlen");
133		/*NOTREACHED*/
134	}
135	memcpy(&sin6, res->ai_addr, res->ai_addrlen);
136	if (ifidx >= 0)
137		sin6.sin6_scope_id = ifidx;
138
139	if ((ripbuf = (struct rip6 *)malloc(BUFSIZ)) == NULL) {
140		err(1, "malloc");
141		/*NOTREACHED*/
142	}
143	ripbuf->rip6_cmd = RIP6_REQUEST;
144	ripbuf->rip6_vers = RIP6_VERSION;
145	ripbuf->rip6_res1[0] = 0;
146	ripbuf->rip6_res1[1] = 0;
147	np = ripbuf->rip6_nets;
148	bzero(&np->rip6_dest, sizeof(struct in6_addr));
149	np->rip6_tag = 0;
150	np->rip6_plen = 0;
151	np->rip6_metric = HOPCNT_INFINITY6;
152	if (sendto(s, ripbuf, RIPSIZE(1), 0, (struct sockaddr *)&sin6,
153			sizeof(struct sockaddr_in6)) < 0) {
154		err(1, "send");
155		/*NOTREACHED*/
156	}
157	do {
158		flen = sizeof(fsock);
159		if ((len = recvfrom(s, ripbuf, BUFSIZ, 0,
160				(struct sockaddr *)&fsock, &flen)) < 0) {
161			err(1, "recvfrom");
162			/*NOTREACHED*/
163		}
164		printf("Response from %s len %d\n",
165			sa_n2a((struct sockaddr *)&fsock), len);
166		n = (len - sizeof(struct rip6) + sizeof(struct netinfo6)) /
167			sizeof(struct netinfo6);
168		np = ripbuf->rip6_nets;
169		for (i = 0; i < n; i++, np++) {
170			printf("\t%s/%d [%d]", inet6_n2a(&np->rip6_dest),
171				np->rip6_plen, np->rip6_metric);
172			if (np->rip6_tag)
173				printf(" tag=0x%x", ntohs(np->rip6_tag));
174			printf("\n");
175		}
176	} while (len == RIPSIZE(24));
177
178	exit(0);
179}
180
181static void
182usage()
183{
184	fprintf(stderr, "Usage: rip6query [-I iface] address\n");
185}
186
187/* getnameinfo() is preferred as we may be able to show ifindex as ifname */
188static const char *
189sa_n2a(sa)
190	struct sockaddr *sa;
191{
192	static char buf[BUFSIZ];
193
194	if (getnameinfo(sa, sa->sa_len, buf, sizeof(buf),
195			NULL, 0, NI_NUMERICHOST | NI_WITHSCOPEID) != 0) {
196		snprintf(buf, sizeof(buf), "%s", "(invalid)");
197	}
198	return buf;
199}
200
201static const char *
202inet6_n2a(addr)
203	struct in6_addr *addr;
204{
205	static char buf[BUFSIZ];
206
207	return inet_ntop(AF_INET6, addr, buf, sizeof(buf));
208}
209