xref: /freebsd/usr.sbin/rip6query/rip6query.c (revision 1e413cf93298b5b97441a21d9a50fdcd0ee9945e)
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 #if defined(__FreeBSD__) && __FreeBSD__ >= 3
50 #include <net/if_var.h>
51 #endif /* __FreeBSD__ >= 3 */
52 #include <netinet/in.h>
53 #include <netinet/in_var.h>
54 #include <arpa/inet.h>
55 #include <netdb.h>
56 
57 #include "route6d.h"
58 
59 int	s;
60 struct sockaddr_in6 sin6;
61 struct rip6	*ripbuf;
62 
63 #define	RIPSIZE(n)	(sizeof(struct rip6) + (n-1) * sizeof(struct netinfo6))
64 
65 int main(int, char **);
66 static void usage(void);
67 static const char *sa_n2a(struct sockaddr *);
68 static const char *inet6_n2a(struct in6_addr *);
69 
70 int
71 main(argc, argv)
72 	int argc;
73 	char **argv;
74 {
75 	struct netinfo6 *np;
76 	struct sockaddr_in6 fsock;
77 	int i, n, len;
78 	int c;
79 	int ifidx = -1;
80 	int error;
81 	socklen_t flen;
82 	char pbuf[10];
83 	struct addrinfo hints, *res;
84 
85 	while ((c = getopt(argc, argv, "I:")) != -1) {
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 
177 static void
178 usage()
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 */
184 static const char *
185 sa_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) != 0) {
192 		snprintf(buf, sizeof(buf), "%s", "(invalid)");
193 	}
194 	return buf;
195 }
196 
197 static const char *
198 inet6_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