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 * $FreeBSD$
34 */
35
36#include <stdio.h>
37
38#include <unistd.h>
39#include <stdlib.h>
40#include <string.h>
41#include <ctype.h>
42#include <signal.h>
43#include <errno.h>
44#include <err.h>
45
46#include <sys/types.h>
47#include <sys/socket.h>
48#include <sys/queue.h>
49
50#include <net/if.h>
51#include <netinet/in.h>
52#include <netinet/in_var.h>
53#include <arpa/inet.h>
54#include <netdb.h>
55
56#include "route6d.h"
57
58static int	s;
59static struct sockaddr_in6 sin6;
60static struct rip6	*ripbuf;
61
62#define	RIPSIZE(n)	(sizeof(struct rip6) + (n-1) * sizeof(struct netinfo6))
63
64int main(int, char **);
65static void usage(void);
66static const char *sa_n2a(struct sockaddr *);
67static const char *inet6_n2a(struct in6_addr *);
68
69int
70main(int argc, char *argv[])
71{
72	struct netinfo6 *np;
73	struct sockaddr_in6 fsock;
74	int i, n, len;
75	int c;
76	int ifidx = -1;
77	int error;
78	socklen_t flen;
79	char pbuf[10];
80	struct addrinfo hints, *res;
81
82	while ((c = getopt(argc, argv, "I:")) != -1) {
83		switch (c) {
84		case 'I':
85			ifidx = if_nametoindex(optarg);
86			if (ifidx == 0) {
87				errx(1, "invalid interface %s", optarg);
88				/*NOTREACHED*/
89			}
90			break;
91		default:
92			usage();
93			exit(1);
94			/*NOTREACHED*/
95		}
96	}
97	argv += optind;
98	argc -= optind;
99
100	if (argc != 1) {
101		usage();
102		exit(1);
103	}
104
105	if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0) {
106		err(1, "socket");
107		/*NOTREACHED*/
108	}
109
110	/* getaddrinfo is preferred for addr@ifname syntax */
111	snprintf(pbuf, sizeof(pbuf), "%d", RIP6_PORT);
112	memset(&hints, 0, sizeof(hints));
113	hints.ai_family = AF_INET6;
114	hints.ai_socktype = SOCK_DGRAM;
115	error = getaddrinfo(argv[0], pbuf, &hints, &res);
116	if (error) {
117		errx(1, "%s: %s", argv[0], gai_strerror(error));
118		/*NOTREACHED*/
119	}
120	if (res->ai_next) {
121		errx(1, "%s: %s", argv[0], "resolved to multiple addrs");
122		/*NOTREACHED*/
123	}
124	if (sizeof(sin6) != res->ai_addrlen) {
125		errx(1, "%s: %s", argv[0], "invalid addrlen");
126		/*NOTREACHED*/
127	}
128	memcpy(&sin6, res->ai_addr, res->ai_addrlen);
129	if (ifidx >= 0)
130		sin6.sin6_scope_id = ifidx;
131
132	if ((ripbuf = (struct rip6 *)malloc(BUFSIZ)) == NULL) {
133		err(1, "malloc");
134		/*NOTREACHED*/
135	}
136	ripbuf->rip6_cmd = RIP6_REQUEST;
137	ripbuf->rip6_vers = RIP6_VERSION;
138	ripbuf->rip6_res1[0] = 0;
139	ripbuf->rip6_res1[1] = 0;
140	np = ripbuf->rip6_nets;
141	bzero(&np->rip6_dest, sizeof(struct in6_addr));
142	np->rip6_tag = 0;
143	np->rip6_plen = 0;
144	np->rip6_metric = HOPCNT_INFINITY6;
145	if (sendto(s, ripbuf, RIPSIZE(1), 0, (struct sockaddr *)&sin6,
146			sizeof(struct sockaddr_in6)) < 0) {
147		err(1, "send");
148		/*NOTREACHED*/
149	}
150	do {
151		flen = sizeof(fsock);
152		if ((len = recvfrom(s, ripbuf, BUFSIZ, 0,
153				(struct sockaddr *)&fsock, &flen)) < 0) {
154			err(1, "recvfrom");
155			/*NOTREACHED*/
156		}
157		printf("Response from %s len %d\n",
158			sa_n2a((struct sockaddr *)&fsock), len);
159		n = (len - sizeof(struct rip6) + sizeof(struct netinfo6)) /
160			sizeof(struct netinfo6);
161		np = ripbuf->rip6_nets;
162		for (i = 0; i < n; i++, np++) {
163			printf("\t%s/%d [%d]", inet6_n2a(&np->rip6_dest),
164				np->rip6_plen, np->rip6_metric);
165			if (np->rip6_tag)
166				printf(" tag=0x%x", ntohs(np->rip6_tag));
167			printf("\n");
168		}
169	} while (len == RIPSIZE(24));
170
171	exit(0);
172}
173
174static void
175usage(void)
176{
177	fprintf(stderr, "usage: rip6query [-I iface] address\n");
178}
179
180/* getnameinfo() is preferred as we may be able to show ifindex as ifname */
181static const char *
182sa_n2a(struct sockaddr *sa)
183{
184	static char buf[NI_MAXHOST];
185
186	if (getnameinfo(sa, sa->sa_len, buf, sizeof(buf),
187			NULL, 0, NI_NUMERICHOST) != 0) {
188		snprintf(buf, sizeof(buf), "%s", "(invalid)");
189	}
190	return buf;
191}
192
193static const char *
194inet6_n2a(struct in6_addr *addr)
195{
196	static char buf[NI_MAXHOST];
197
198	return inet_ntop(AF_INET6, addr, buf, sizeof(buf));
199}
200