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: src/usr.sbin/rip6query/rip6query.c,v 1.3.2.2 2001/07/03 11:02:08 ume Exp $
  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(__DragonFly__)
  50 #include <net/if_var.h>
  51 #endif /* __DragonFly__  */
  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 /* wrapper for KAME-special getnameinfo() */
  60 #ifndef NI_WITHSCOPEID
  61 #define NI_WITHSCOPEID  0
  62 #endif
  63
  64 int     s;
  65 struct sockaddr_in6 sin6;
  66 struct rip6     *ripbuf;
  67
  68 #define RIPSIZE(n)      (sizeof(struct rip6) + (n-1) * sizeof(struct netinfo6))
  69
  70 static void usage(void);
  71 static const char *sa_n2a(struct sockaddr *);
  72 static const char *inet6_n2a(struct in6_addr *);
  73
  74 int
  75 main(int argc, char **argv)
  76 {
  77         struct netinfo6 *np;
  78         struct sockaddr_in6 fsock;
  79         int i, n, len, flen;
  80         int c;
  81         int ifidx = -1;
  82         int error;
  83         char pbuf[10];
  84         struct addrinfo hints, *res;
  85
  86         while ((c = getopt(argc, argv, "I:")) != -1) {
  87                 switch (c) {
  88                 case 'I':
  89                         ifidx = if_nametoindex(optarg);
  90                         if (ifidx == 0) {
  91                                 errx(1, "invalid interface %s", optarg);
  92                                 /*NOTREACHED*/
  93                         }
  94                         break;
  95                 default:
  96                         usage();
  97                         exit(1);
  98                         /*NOTREACHED*/
  99                 }
 100         }
 101         argv += optind;
 102         argc -= optind;
 103
 104         if (argc != 1) {
 105                 usage();
 106                 exit(1);
 107         }
 108
 109         if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0) {
 110                 err(1, "socket");
 111                 /*NOTREACHED*/
 112         }
 113
 114         /* getaddrinfo is preferred for addr@ifname syntax */
 115         snprintf(pbuf, sizeof(pbuf), "%d", RIP6_PORT);
 116         memset(&hints, 0, sizeof(hints));
 117         hints.ai_family = AF_INET6;
 118         hints.ai_socktype = SOCK_DGRAM;
 119         error = getaddrinfo(argv[0], pbuf, &hints, &res);
 120         if (error) {
 121                 errx(1, "%s: %s", argv[0], gai_strerror(error));
 122                 /*NOTREACHED*/
 123         }
 124         if (res->ai_next) {
 125                 errx(1, "%s: %s", argv[0], "resolved to multiple addrs");
 126                 /*NOTREACHED*/
 127         }
 128         if (sizeof(sin6) != res->ai_addrlen) {
 129                 errx(1, "%s: %s", argv[0], "invalid addrlen");
 130                 /*NOTREACHED*/
 131         }
 132         memcpy(&sin6, res->ai_addr, res->ai_addrlen);
 133         if (ifidx >= 0)
 134                 sin6.sin6_scope_id = ifidx;
 135
 136         if ((ripbuf = (struct rip6 *)malloc(BUFSIZ)) == NULL) {
 137                 err(1, "malloc");
 138                 /*NOTREACHED*/
 139         }
 140         ripbuf->rip6_cmd = RIP6_REQUEST;
 141         ripbuf->rip6_vers = RIP6_VERSION;
 142         ripbuf->rip6_res1[0] = 0;
 143         ripbuf->rip6_res1[1] = 0;
 144         np = ripbuf->rip6_nets;
 145         bzero(&np->rip6_dest, sizeof(struct in6_addr));
 146         np->rip6_tag = 0;
 147         np->rip6_plen = 0;
 148         np->rip6_metric = HOPCNT_INFINITY6;
 149         if (sendto(s, ripbuf, RIPSIZE(1), 0, (struct sockaddr *)&sin6,
 150                         sizeof(struct sockaddr_in6)) < 0) {
 151                 err(1, "send");
 152                 /*NOTREACHED*/
 153         }
 154         do {
 155                 flen = sizeof(fsock);
 156                 if ((len = recvfrom(s, ripbuf, BUFSIZ, 0,
 157                                 (struct sockaddr *)&fsock, &flen)) < 0) {
 158                         err(1, "recvfrom");
 159                         /*NOTREACHED*/
 160                 }
 161                 printf("Response from %s len %d\n",
 162                         sa_n2a((struct sockaddr *)&fsock), len);
 163                 n = (len - sizeof(struct rip6) + sizeof(struct netinfo6)) /
 164                         sizeof(struct netinfo6);
 165                 np = ripbuf->rip6_nets;
 166                 for (i = 0; i < n; i++, np++) {
 167                         printf("\t%s/%d [%d]", inet6_n2a(&np->rip6_dest),
 168                                 np->rip6_plen, np->rip6_metric);
 169                         if (np->rip6_tag)
 170                                 printf(" tag=0x%x", ntohs(np->rip6_tag));
 171                         printf("\n");
 172                 }
 173         } while (len == RIPSIZE(24));
 174
 175         exit(0);
 176 }
 177
 178 static void
 179 usage(void)
 180 {
 181         fprintf(stderr, "Usage: rip6query [-I iface] address\n");
 182 }
 183
 184 /* getnameinfo() is preferred as we may be able to show ifindex as ifname */
 185 static const char *
 186 sa_n2a(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 | NI_WITHSCOPEID) != 0) {
 192                 snprintf(buf, sizeof(buf), "%s", "(invalid)");
 193         }
 194         return buf;
 195 }
 196
 197 static const char *
 198 inet6_n2a(struct in6_addr *addr)
 199 {
 200         static char buf[NI_MAXHOST];
 201
 202         return inet_ntop(AF_INET6, addr, buf, sizeof(buf));
 203 }