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 static int s;
60 static struct sockaddr_in6 sin6;
61 static 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
main(int argc,char * argv[])71 main(int argc, char *argv[])
72 {
73 struct netinfo6 *np;
74 struct sockaddr_in6 fsock;
75 int i, n, len;
76 int c;
77 int ifidx = -1;
78 int error;
79 socklen_t flen;
80 char pbuf[10];
81 struct addrinfo hints, *res;
82
83 while ((c = getopt(argc, argv, "I:")) != -1) {
84 switch (c) {
85 case 'I':
86 ifidx = if_nametoindex(optarg);
87 if (ifidx == 0) {
88 errx(1, "invalid interface %s", optarg);
89 /*NOTREACHED*/
90 }
91 break;
92 default:
93 usage();
94 exit(1);
95 /*NOTREACHED*/
96 }
97 }
98 argv += optind;
99 argc -= optind;
100
101 if (argc != 1) {
102 usage();
103 exit(1);
104 }
105
106 if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0) {
107 err(1, "socket");
108 /*NOTREACHED*/
109 }
110
111 /* getaddrinfo is preferred for addr@ifname syntax */
112 snprintf(pbuf, sizeof(pbuf), "%d", RIP6_PORT);
113 memset(&hints, 0, sizeof(hints));
114 hints.ai_family = AF_INET6;
115 hints.ai_socktype = SOCK_DGRAM;
116 error = getaddrinfo(argv[0], pbuf, &hints, &res);
117 if (error) {
118 errx(1, "%s: %s", argv[0], gai_strerror(error));
119 /*NOTREACHED*/
120 }
121 if (res->ai_next) {
122 errx(1, "%s: %s", argv[0], "resolved to multiple addrs");
123 /*NOTREACHED*/
124 }
125 if (sizeof(sin6) != res->ai_addrlen) {
126 errx(1, "%s: %s", argv[0], "invalid addrlen");
127 /*NOTREACHED*/
128 }
129 memcpy(&sin6, res->ai_addr, res->ai_addrlen);
130 if (ifidx >= 0)
131 sin6.sin6_scope_id = ifidx;
132
133 if ((ripbuf = (struct rip6 *)malloc(BUFSIZ)) == NULL) {
134 err(1, "malloc");
135 /*NOTREACHED*/
136 }
137 ripbuf->rip6_cmd = RIP6_REQUEST;
138 ripbuf->rip6_vers = RIP6_VERSION;
139 ripbuf->rip6_res1[0] = 0;
140 ripbuf->rip6_res1[1] = 0;
141 np = ripbuf->rip6_nets;
142 bzero(&np->rip6_dest, sizeof(struct in6_addr));
143 np->rip6_tag = 0;
144 np->rip6_plen = 0;
145 np->rip6_metric = HOPCNT_INFINITY6;
146 if (sendto(s, ripbuf, RIPSIZE(1), 0, (struct sockaddr *)&sin6,
147 sizeof(struct sockaddr_in6)) < 0) {
148 err(1, "send");
149 /*NOTREACHED*/
150 }
151 do {
152 flen = sizeof(fsock);
153 if ((len = recvfrom(s, ripbuf, BUFSIZ, 0,
154 (struct sockaddr *)&fsock, &flen)) < 0) {
155 err(1, "recvfrom");
156 /*NOTREACHED*/
157 }
158 printf("Response from %s len %d\n",
159 sa_n2a((struct sockaddr *)&fsock), len);
160 n = (len - sizeof(struct rip6) + sizeof(struct netinfo6)) /
161 sizeof(struct netinfo6);
162 np = ripbuf->rip6_nets;
163 for (i = 0; i < n; i++, np++) {
164 printf("\t%s/%d [%d]", inet6_n2a(&np->rip6_dest),
165 np->rip6_plen, np->rip6_metric);
166 if (np->rip6_tag)
167 printf(" tag=0x%x", ntohs(np->rip6_tag));
168 printf("\n");
169 }
170 } while (len == RIPSIZE(24));
171
172 exit(0);
173 }
174
175 static void
usage(void)176 usage(void)
177 {
178 fprintf(stderr, "usage: rip6query [-I iface] address\n");
179 }
180
181 /* getnameinfo() is preferred as we may be able to show ifindex as ifname */
182 static const char *
sa_n2a(struct sockaddr * sa)183 sa_n2a(struct sockaddr *sa)
184 {
185 static char buf[NI_MAXHOST];
186
187 if (getnameinfo(sa, sa->sa_len, buf, sizeof(buf),
188 NULL, 0, NI_NUMERICHOST) != 0) {
189 snprintf(buf, sizeof(buf), "%s", "(invalid)");
190 }
191 return buf;
192 }
193
194 static const char *
inet6_n2a(struct in6_addr * addr)195 inet6_n2a(struct in6_addr *addr)
196 {
197 static char buf[NI_MAXHOST];
198
199 return inet_ntop(AF_INET6, addr, buf, sizeof(buf));
200 }
201