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
58 static int s;
59 static struct sockaddr_in6 sin6;
60 static struct rip6 *ripbuf;
61
62 #define RIPSIZE(n) (sizeof(struct rip6) + (n-1) * sizeof(struct netinfo6))
63
64 int main(int, char **);
65 static void usage(void);
66 static const char *sa_n2a(struct sockaddr *);
67 static const char *inet6_n2a(struct in6_addr *);
68
69 int
main(int argc,char * argv[])70 main(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
174 static void
usage(void)175 usage(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 */
181 static const char *
sa_n2a(struct sockaddr * sa)182 sa_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
193 static const char *
inet6_n2a(struct in6_addr * addr)194 inet6_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