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
56 static int s;
57 static struct sockaddr_in6 sin6;
58 static struct rip6 *ripbuf;
59
60 #define RIPSIZE(n) (sizeof(struct rip6) + (n-1) * sizeof(struct netinfo6))
61
62 int main(int, char **);
63 static void usage(void) __dead2;
64 static const char *sa_n2a(struct sockaddr *);
65 static const char *inet6_n2a(struct in6_addr *);
66
67 int
main(int argc,char * argv[])68 main(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
170 static void
usage(void)171 usage(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 */
178 static const char *
sa_n2a(struct sockaddr * sa)179 sa_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
190 static const char *
inet6_n2a(struct in6_addr * addr)191 inet6_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