1/*	$KAME: rip6query.c,v 1.11 2001/05/08 04:36:37 itojun Exp $	*/
2
3/*-
4 * SPDX-License-Identifier: BSD-3-Clause
5 *
6 * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
7 * All rights reserved.
8 *
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
11 * are met:
12 * 1. Redistributions of source code must retain the above copyright
13 *    notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 *    notice, this list of conditions and the following disclaimer in the
16 *    documentation and/or other materials provided with the distribution.
17 * 3. Neither the name of the project nor the names of its contributors
18 *    may be used to endorse or promote products derived from this software
19 *    without specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED.  IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * SUCH DAMAGE.
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#include <netinet/in.h>
50#include <netinet/in_var.h>
51#include <arpa/inet.h>
52#include <netdb.h>
53
54#include "route6d.h"
55
56static int	s;
57static struct sockaddr_in6 sin6;
58static struct rip6	*ripbuf;
59
60#define	RIPSIZE(n)	(sizeof(struct rip6) + (n-1) * sizeof(struct netinfo6))
61
62int main(int, char **);
63static void usage(void) __dead2;
64static const char *sa_n2a(struct sockaddr *);
65static const char *inet6_n2a(struct in6_addr *);
66
67int
68main(int argc, char *argv[])
69{
70	struct netinfo6 *np;
71	struct sockaddr_in6 fsock;
72	int i, n, len;
73	int c;
74	int ifidx = -1;
75	int error;
76	socklen_t flen;
77	char pbuf[10];
78	struct addrinfo hints, *res;
79
80	while ((c = getopt(argc, argv, "I:")) != -1) {
81		switch (c) {
82		case 'I':
83			ifidx = if_nametoindex(optarg);
84			if (ifidx == 0) {
85				errx(1, "invalid interface %s", optarg);
86				/*NOTREACHED*/
87			}
88			break;
89		default:
90			usage();
91			/*NOTREACHED*/
92		}
93	}
94	argv += optind;
95	argc -= optind;
96
97	if (argc != 1) {
98		usage();
99	}
100
101	if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0) {
102		err(1, "socket");
103		/*NOTREACHED*/
104	}
105
106	/* getaddrinfo is preferred for addr@ifname syntax */
107	snprintf(pbuf, sizeof(pbuf), "%d", RIP6_PORT);
108	memset(&hints, 0, sizeof(hints));
109	hints.ai_family = AF_INET6;
110	hints.ai_socktype = SOCK_DGRAM;
111	error = getaddrinfo(argv[0], pbuf, &hints, &res);
112	if (error) {
113		errx(1, "%s: %s", argv[0], gai_strerror(error));
114		/*NOTREACHED*/
115	}
116	if (res->ai_next) {
117		errx(1, "%s: %s", argv[0], "resolved to multiple addrs");
118		/*NOTREACHED*/
119	}
120	if (sizeof(sin6) != res->ai_addrlen) {
121		errx(1, "%s: %s", argv[0], "invalid addrlen");
122		/*NOTREACHED*/
123	}
124	memcpy(&sin6, res->ai_addr, res->ai_addrlen);
125	if (ifidx >= 0)
126		sin6.sin6_scope_id = ifidx;
127
128	if ((ripbuf = (struct rip6 *)malloc(BUFSIZ)) == NULL) {
129		err(1, "malloc");
130		/*NOTREACHED*/
131	}
132	ripbuf->rip6_cmd = RIP6_REQUEST;
133	ripbuf->rip6_vers = RIP6_VERSION;
134	ripbuf->rip6_res1[0] = 0;
135	ripbuf->rip6_res1[1] = 0;
136	np = ripbuf->rip6_nets;
137	bzero(&np->rip6_dest, sizeof(struct in6_addr));
138	np->rip6_tag = 0;
139	np->rip6_plen = 0;
140	np->rip6_metric = HOPCNT_INFINITY6;
141	if (sendto(s, ripbuf, RIPSIZE(1), 0, (struct sockaddr *)&sin6,
142			sizeof(struct sockaddr_in6)) < 0) {
143		err(1, "send");
144		/*NOTREACHED*/
145	}
146	do {
147		flen = sizeof(fsock);
148		if ((len = recvfrom(s, ripbuf, BUFSIZ, 0,
149				(struct sockaddr *)&fsock, &flen)) < 0) {
150			err(1, "recvfrom");
151			/*NOTREACHED*/
152		}
153		printf("Response from %s len %d\n",
154			sa_n2a((struct sockaddr *)&fsock), len);
155		n = (len - sizeof(struct rip6) + sizeof(struct netinfo6)) /
156			sizeof(struct netinfo6);
157		np = ripbuf->rip6_nets;
158		for (i = 0; i < n; i++, np++) {
159			printf("\t%s/%d [%d]", inet6_n2a(&np->rip6_dest),
160				np->rip6_plen, np->rip6_metric);
161			if (np->rip6_tag)
162				printf(" tag=0x%x", ntohs(np->rip6_tag));
163			printf("\n");
164		}
165	} while (len == RIPSIZE(24));
166
167	return 0;
168}
169
170static void
171usage(void)
172{
173	fprintf(stderr, "usage: rip6query [-I iface] address\n");
174	exit(1);
175}
176
177/* getnameinfo() is preferred as we may be able to show ifindex as ifname */
178static const char *
179sa_n2a(struct sockaddr *sa)
180{
181	static char buf[NI_MAXHOST];
182
183	if (getnameinfo(sa, sa->sa_len, buf, sizeof(buf),
184			NULL, 0, NI_NUMERICHOST) != 0) {
185		snprintf(buf, sizeof(buf), "%s", "(invalid)");
186	}
187	return buf;
188}
189
190static const char *
191inet6_n2a(struct in6_addr *addr)
192{
193	static char buf[NI_MAXHOST];
194
195	return inet_ntop(AF_INET6, addr, buf, sizeof(buf));
196}
197