usr.sbin/rip6query/rip6query.c

   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 }