usr.sbin/rip6query/rip6query.c

   1 /*      $NetBSD: rip6query.c,v 1.9 2003/04/15 07:23:19 itojun Exp $     */
   2 /*      $KAME: rip6query.c,v 1.17 2002/09/08 01:35:17 itojun Exp $      */
   3
   4 /*
   5  * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
   6  * All rights reserved.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  11  * 1. Redistributions of source code must retain the above copyright
  12  *    notice, this list of conditions and the following disclaimer.
  13  * 2. Redistributions in binary form must reproduce the above copyright
  14  *    notice, this list of conditions and the following disclaimer in the
  15  *    documentation and/or other materials provided with the distribution.
  16  * 3. Neither the name of the project nor the names of its contributors
  17  *    may be used to endorse or promote products derived from this software
  18  *    without specific prior written permission.
  19  *
  20  * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
  21  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  22  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  23  * ARE DISCLAIMED.  IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
  24  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  25  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  26  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  27  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  28  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  29  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  30  * SUCH DAMAGE.
  31  */
  32
  33 #include <stdio.h>
  34
  35 #include <unistd.h>
  36 #include <stdlib.h>
  37 #include <string.h>
  38 #include <ctype.h>
  39 #include <signal.h>
  40 #include <errno.h>
  41 #include <err.h>
  42
  43 #include <sys/types.h>
  44 #include <sys/socket.h>
  45 #include <sys/queue.h>
  46
  47 #include <net/if.h>
  48 #if defined(__FreeBSD__) && __FreeBSD__ >= 3
  49 #include <net/if_var.h>
  50 #endif /* __FreeBSD__ >= 3 */
  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 #define DEFAULT_WAIT    5
  59
  60 int     s;
  61 int     query_wait = DEFAULT_WAIT;
  62 struct sockaddr_in6 sin6;
  63 struct rip6     *ripbuf;
  64
  65 #define RIPSIZE(n)      (sizeof(struct rip6) + (n-1) * sizeof(struct netinfo6))
  66
  67 int main __P((int, char **));
  68 static void usage __P((void));
  69 static void sigalrm_handler __P((int));
  70 static const char *sa_n2a __P((struct sockaddr *));
  71 static const char *inet6_n2a __P((struct in6_addr *));
  72
  73 int
  74 main(argc, argv)
  75         int argc;
  76         char **argv;
  77 {
  78         struct netinfo6 *np;
  79         struct sockaddr_in6 fsock;
  80         int i, n, len;
  81         socklen_t flen;
  82         int c;
  83         int ifidx = -1;
  84         int error;
  85         char pbuf[NI_MAXSERV];
  86         struct addrinfo hints, *res;
  87
  88         while ((c = getopt(argc, argv, "I:w:")) != -1) {
  89                 switch (c) {
  90                 case 'I':
  91                         ifidx = if_nametoindex(optarg);
  92                         if (ifidx == 0) {
  93                                 errx(1, "invalid interface %s", optarg);
  94                                 /*NOTREACHED*/
  95                         }
  96                         break;
  97                 case 'w':
  98                         query_wait = atoi(optarg);
  99                         break;
 100                 default:
 101                         usage();
 102                         exit(1);
 103                         /*NOTREACHED*/
 104                 }
 105         }
 106         argv += optind;
 107         argc -= optind;
 108
 109         if (argc != 1) {
 110                 usage();
 111                 exit(1);
 112         }
 113
 114         if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0) {
 115                 err(1, "socket");
 116                 /*NOTREACHED*/
 117         }
 118
 119         /* getaddrinfo is preferred for addr%scope syntax */
 120         snprintf(pbuf, sizeof(pbuf), "%d", RIP6_PORT);
 121         memset(&hints, 0, sizeof(hints));
 122         hints.ai_family = AF_INET6;
 123         hints.ai_socktype = SOCK_DGRAM;
 124         error = getaddrinfo(argv[0], pbuf, &hints, &res);
 125         if (error) {
 126                 errx(1, "%s: %s", argv[0], gai_strerror(error));
 127                 /*NOTREACHED*/
 128         }
 129         if (res->ai_next) {
 130                 errx(1, "%s: %s", argv[0], "resolved to multiple addrs");
 131                 /*NOTREACHED*/
 132         }
 133         if (sizeof(sin6) != res->ai_addrlen) {
 134                 errx(1, "%s: %s", argv[0], "invalid addrlen");
 135                 /*NOTREACHED*/
 136         }
 137         memcpy(&sin6, res->ai_addr, res->ai_addrlen);
 138         if (ifidx >= 0)
 139                 sin6.sin6_scope_id = ifidx;
 140
 141         if ((ripbuf = (struct rip6 *)malloc(BUFSIZ)) == NULL) {
 142                 err(1, "malloc");
 143                 /*NOTREACHED*/
 144         }
 145         ripbuf->rip6_cmd = RIP6_REQUEST;
 146         ripbuf->rip6_vers = RIP6_VERSION;
 147         ripbuf->rip6_res1[0] = 0;
 148         ripbuf->rip6_res1[1] = 0;
 149         np = ripbuf->rip6_nets;
 150         bzero(&np->rip6_dest, sizeof(struct in6_addr));
 151         np->rip6_tag = 0;
 152         np->rip6_plen = 0;
 153         np->rip6_metric = HOPCNT_INFINITY6;
 154         if (sendto(s, ripbuf, RIPSIZE(1), 0, (struct sockaddr *)&sin6,
 155             sizeof(struct sockaddr_in6)) < 0) {
 156                 err(1, "send");
 157                 /*NOTREACHED*/
 158         }
 159         signal(SIGALRM, sigalrm_handler);
 160         for (;;) {
 161                 flen = sizeof(fsock);
 162                 alarm(query_wait);
 163                 if ((len = recvfrom(s, ripbuf, BUFSIZ, 0,
 164                     (struct sockaddr *)&fsock, &flen)) < 0) {
 165                         err(1, "recvfrom");
 166                         /*NOTREACHED*/
 167                 }
 168                 alarm(0);
 169                 printf("Response from %s len %d\n",
 170                     sa_n2a((struct sockaddr *)&fsock), len);
 171                 n = (len - sizeof(struct rip6) + sizeof(struct netinfo6)) /
 172                     sizeof(struct netinfo6);
 173                 np = ripbuf->rip6_nets;
 174                 for (i = 0; i < n; i++, np++) {
 175                         printf("\t%s/%d [%d]", inet6_n2a(&np->rip6_dest),
 176                             np->rip6_plen, np->rip6_metric);
 177                         if (np->rip6_tag)
 178                                 printf(" tag=0x%x", ntohs(np->rip6_tag));
 179                         printf("\n");
 180                 }
 181         }
 182
 183         exit(0);
 184 }
 185
 186 static void
 187 usage()
 188 {
 189         fprintf(stderr, "usage: rip6query [-I iface] [-w wait] address\n");
 190 }
 191
 192 /* getnameinfo() is preferred as we may be able to show ifindex as ifname */
 193 static const char *
 194 sa_n2a(sa)
 195         struct sockaddr *sa;
 196 {
 197         static char buf[NI_MAXHOST];
 198
 199         if (getnameinfo(sa, sa->sa_len, buf, sizeof(buf),
 200             NULL, 0, NI_NUMERICHOST) != 0) {
 201                 snprintf(buf, sizeof(buf), "%s", "(invalid)");
 202         }
 203         return buf;
 204 }
 205
 206 static const char *
 207 inet6_n2a(addr)
 208         struct in6_addr *addr;
 209 {
 210         static char buf[NI_MAXHOST];
 211
 212         return inet_ntop(AF_INET6, addr, buf, sizeof(buf));
 213 }
 214
 215 static void
 216 sigalrm_handler(sig)
 217         int sig;
 218 {
 219
 220         _exit(0);
 221 }