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 #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);
  64 static const char *sa_n2a(struct sockaddr *);
  65 static const char *inet6_n2a(struct in6_addr *);
  66
  67 int
  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                         exit(1);
  92                         /*NOTREACHED*/
  93                 }
  94         }
  95         argv += optind;
  96         argc -= optind;
  97
  98         if (argc != 1) {
  99                 usage();
 100                 exit(1);
 101         }
 102
 103         if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0) {
 104                 err(1, "socket");
 105                 /*NOTREACHED*/
 106         }
 107
 108         /* getaddrinfo is preferred for addr@ifname syntax */
 109         snprintf(pbuf, sizeof(pbuf), "%d", RIP6_PORT);
 110         memset(&hints, 0, sizeof(hints));
 111         hints.ai_family = AF_INET6;
 112         hints.ai_socktype = SOCK_DGRAM;
 113         error = getaddrinfo(argv[0], pbuf, &hints, &res);
 114         if (error) {
 115                 errx(1, "%s: %s", argv[0], gai_strerror(error));
 116                 /*NOTREACHED*/
 117         }
 118         if (res->ai_next) {
 119                 errx(1, "%s: %s", argv[0], "resolved to multiple addrs");
 120                 /*NOTREACHED*/
 121         }
 122         if (sizeof(sin6) != res->ai_addrlen) {
 123                 errx(1, "%s: %s", argv[0], "invalid addrlen");
 124                 /*NOTREACHED*/
 125         }
 126         memcpy(&sin6, res->ai_addr, res->ai_addrlen);
 127         if (ifidx >= 0)
 128                 sin6.sin6_scope_id = ifidx;
 129
 130         if ((ripbuf = (struct rip6 *)malloc(BUFSIZ)) == NULL) {
 131                 err(1, "malloc");
 132                 /*NOTREACHED*/
 133         }
 134         ripbuf->rip6_cmd = RIP6_REQUEST;
 135         ripbuf->rip6_vers = RIP6_VERSION;
 136         ripbuf->rip6_res1[0] = 0;
 137         ripbuf->rip6_res1[1] = 0;
 138         np = ripbuf->rip6_nets;
 139         bzero(&np->rip6_dest, sizeof(struct in6_addr));
 140         np->rip6_tag = 0;
 141         np->rip6_plen = 0;
 142         np->rip6_metric = HOPCNT_INFINITY6;
 143         if (sendto(s, ripbuf, RIPSIZE(1), 0, (struct sockaddr *)&sin6,
 144                         sizeof(struct sockaddr_in6)) < 0) {
 145                 err(1, "send");
 146                 /*NOTREACHED*/
 147         }
 148         do {
 149                 flen = sizeof(fsock);
 150                 if ((len = recvfrom(s, ripbuf, BUFSIZ, 0,
 151                                 (struct sockaddr *)&fsock, &flen)) < 0) {
 152                         err(1, "recvfrom");
 153                         /*NOTREACHED*/
 154                 }
 155                 printf("Response from %s len %d\n",
 156                         sa_n2a((struct sockaddr *)&fsock), len);
 157                 n = (len - sizeof(struct rip6) + sizeof(struct netinfo6)) /
 158                         sizeof(struct netinfo6);
 159                 np = ripbuf->rip6_nets;
 160                 for (i = 0; i < n; i++, np++) {
 161                         printf("\t%s/%d [%d]", inet6_n2a(&np->rip6_dest),
 162                                 np->rip6_plen, np->rip6_metric);
 163                         if (np->rip6_tag)
 164                                 printf(" tag=0x%x", ntohs(np->rip6_tag));
 165                         printf("\n");
 166                 }
 167         } while (len == RIPSIZE(24));
 168
 169         exit(0);
 170 }
 171
 172 static void
 173 usage(void)
 174 {
 175         fprintf(stderr, "usage: rip6query [-I iface] address\n");
 176 }
 177
 178 /* getnameinfo() is preferred as we may be able to show ifindex as ifname */
 179 static const char *
 180 sa_n2a(struct sockaddr *sa)
 181 {
 182         static char buf[NI_MAXHOST];
 183
 184         if (getnameinfo(sa, sa->sa_len, buf, sizeof(buf),
 185                         NULL, 0, NI_NUMERICHOST) != 0) {
 186                 snprintf(buf, sizeof(buf), "%s", "(invalid)");
 187         }
 188         return buf;
 189 }
 190
 191 static const char *
 192 inet6_n2a(struct in6_addr *addr)
 193 {
 194         static char buf[NI_MAXHOST];
 195
 196         return inet_ntop(AF_INET6, addr, buf, sizeof(buf));
 197 }