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 * $FreeBSD$
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);
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			exit(1);
92			/*NOTREACHED*/
93		}
94	}
95	argv += optind;
96	argc -= optind;
97
98	if (argc != 1) {
99		usage();
100		exit(1);
101	}
102
103	if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0) {
104		err(1, "socket");
105		/*NOTREACHED*/
106	}
107
108	/* getaddrinfo is preferred for addr@ifname syntax */
109	snprintf(pbuf, sizeof(pbuf), "%d", RIP6_PORT);
110	memset(&hints, 0, sizeof(hints));
111	hints.ai_family = AF_INET6;
112	hints.ai_socktype = SOCK_DGRAM;
113	error = getaddrinfo(argv[0], pbuf, &hints, &res);
114	if (error) {
115		errx(1, "%s: %s", argv[0], gai_strerror(error));
116		/*NOTREACHED*/
117	}
118	if (res->ai_next) {
119		errx(1, "%s: %s", argv[0], "resolved to multiple addrs");
120		/*NOTREACHED*/
121	}
122	if (sizeof(sin6) != res->ai_addrlen) {
123		errx(1, "%s: %s", argv[0], "invalid addrlen");
124		/*NOTREACHED*/
125	}
126	memcpy(&sin6, res->ai_addr, res->ai_addrlen);
127	if (ifidx >= 0)
128		sin6.sin6_scope_id = ifidx;
129
130	if ((ripbuf = (struct rip6 *)malloc(BUFSIZ)) == NULL) {
131		err(1, "malloc");
132		/*NOTREACHED*/
133	}
134	ripbuf->rip6_cmd = RIP6_REQUEST;
135	ripbuf->rip6_vers = RIP6_VERSION;
136	ripbuf->rip6_res1[0] = 0;
137	ripbuf->rip6_res1[1] = 0;
138	np = ripbuf->rip6_nets;
139	bzero(&np->rip6_dest, sizeof(struct in6_addr));
140	np->rip6_tag = 0;
141	np->rip6_plen = 0;
142	np->rip6_metric = HOPCNT_INFINITY6;
143	if (sendto(s, ripbuf, RIPSIZE(1), 0, (struct sockaddr *)&sin6,
144			sizeof(struct sockaddr_in6)) < 0) {
145		err(1, "send");
146		/*NOTREACHED*/
147	}
148	do {
149		flen = sizeof(fsock);
150		if ((len = recvfrom(s, ripbuf, BUFSIZ, 0,
151				(struct sockaddr *)&fsock, &flen)) < 0) {
152			err(1, "recvfrom");
153			/*NOTREACHED*/
154		}
155		printf("Response from %s len %d\n",
156			sa_n2a((struct sockaddr *)&fsock), len);
157		n = (len - sizeof(struct rip6) + sizeof(struct netinfo6)) /
158			sizeof(struct netinfo6);
159		np = ripbuf->rip6_nets;
160		for (i = 0; i < n; i++, np++) {
161			printf("\t%s/%d [%d]", inet6_n2a(&np->rip6_dest),
162				np->rip6_plen, np->rip6_metric);
163			if (np->rip6_tag)
164				printf(" tag=0x%x", ntohs(np->rip6_tag));
165			printf("\n");
166		}
167	} while (len == RIPSIZE(24));
168
169	exit(0);
170}
171
172static void
173usage(void)
174{
175	fprintf(stderr, "usage: rip6query [-I iface] address\n");
176}
177
178/* getnameinfo() is preferred as we may be able to show ifindex as ifname */
179static const char *
180sa_n2a(struct sockaddr *sa)
181{
182	static char buf[NI_MAXHOST];
183
184	if (getnameinfo(sa, sa->sa_len, buf, sizeof(buf),
185			NULL, 0, NI_NUMERICHOST) != 0) {
186		snprintf(buf, sizeof(buf), "%s", "(invalid)");
187	}
188	return buf;
189}
190
191static const char *
192inet6_n2a(struct in6_addr *addr)
193{
194	static char buf[NI_MAXHOST];
195
196	return inet_ntop(AF_INET6, addr, buf, sizeof(buf));
197}
198