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 __P((int, char **)); 66 static void usage __P((void)); 67 static const char *sa_n2a __P((struct sockaddr *)); 68 static const char *inet6_n2a __P((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, flen; 78 int c; 79 int ifidx = -1; 80 int error; 81 char pbuf[10]; 82 struct addrinfo hints, *res; 83 84 while ((c = getopt(argc, argv, "I:")) != -1) { 85 switch (c) { 86 case 'I': 87 ifidx = if_nametoindex(optarg); 88 if (ifidx == 0) { 89 errx(1, "invalid interface %s", optarg); 90 /*NOTREACHED*/ 91 } 92 break; 93 default: 94 usage(); 95 exit(1); 96 /*NOTREACHED*/ 97 } 98 } 99 argv += optind; 100 argc -= optind; 101 102 if (argc != 1) { 103 usage(); 104 exit(1); 105 } 106 107 if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0) { 108 err(1, "socket"); 109 /*NOTREACHED*/ 110 } 111 112 /* getaddrinfo is preferred for addr@ifname syntax */ 113 snprintf(pbuf, sizeof(pbuf), "%d", RIP6_PORT); 114 memset(&hints, 0, sizeof(hints)); 115 hints.ai_family = AF_INET6; 116 hints.ai_socktype = SOCK_DGRAM; 117 error = getaddrinfo(argv[0], pbuf, &hints, &res); 118 if (error) { 119 errx(1, "%s: %s", argv[0], gai_strerror(error)); 120 /*NOTREACHED*/ 121 } 122 if (res->ai_next) { 123 errx(1, "%s: %s", argv[0], "resolved to multiple addrs"); 124 /*NOTREACHED*/ 125 } 126 if (sizeof(sin6) != res->ai_addrlen) { 127 errx(1, "%s: %s", argv[0], "invalid addrlen"); 128 /*NOTREACHED*/ 129 } 130 memcpy(&sin6, res->ai_addr, res->ai_addrlen); 131 if (ifidx >= 0) 132 sin6.sin6_scope_id = ifidx; 133 134 if ((ripbuf = (struct rip6 *)malloc(BUFSIZ)) == NULL) { 135 err(1, "malloc"); 136 /*NOTREACHED*/ 137 } 138 ripbuf->rip6_cmd = RIP6_REQUEST; 139 ripbuf->rip6_vers = RIP6_VERSION; 140 ripbuf->rip6_res1[0] = 0; 141 ripbuf->rip6_res1[1] = 0; 142 np = ripbuf->rip6_nets; 143 bzero(&np->rip6_dest, sizeof(struct in6_addr)); 144 np->rip6_tag = 0; 145 np->rip6_plen = 0; 146 np->rip6_metric = HOPCNT_INFINITY6; 147 if (sendto(s, ripbuf, RIPSIZE(1), 0, (struct sockaddr *)&sin6, 148 sizeof(struct sockaddr_in6)) < 0) { 149 err(1, "send"); 150 /*NOTREACHED*/ 151 } 152 do { 153 flen = sizeof(fsock); 154 if ((len = recvfrom(s, ripbuf, BUFSIZ, 0, 155 (struct sockaddr *)&fsock, &flen)) < 0) { 156 err(1, "recvfrom"); 157 /*NOTREACHED*/ 158 } 159 printf("Response from %s len %d\n", 160 sa_n2a((struct sockaddr *)&fsock), len); 161 n = (len - sizeof(struct rip6) + sizeof(struct netinfo6)) / 162 sizeof(struct netinfo6); 163 np = ripbuf->rip6_nets; 164 for (i = 0; i < n; i++, np++) { 165 printf("\t%s/%d [%d]", inet6_n2a(&np->rip6_dest), 166 np->rip6_plen, np->rip6_metric); 167 if (np->rip6_tag) 168 printf(" tag=0x%x", ntohs(np->rip6_tag)); 169 printf("\n"); 170 } 171 } while (len == RIPSIZE(24)); 172 173 exit(0); 174 } 175 176 static void 177 usage() 178 { 179 fprintf(stderr, "usage: rip6query [-I iface] address\n"); 180 } 181 182 /* getnameinfo() is preferred as we may be able to show ifindex as ifname */ 183 static const char * 184 sa_n2a(sa) 185 struct sockaddr *sa; 186 { 187 static char buf[NI_MAXHOST]; 188 189 if (getnameinfo(sa, sa->sa_len, buf, sizeof(buf), 190 NULL, 0, NI_NUMERICHOST) != 0) { 191 snprintf(buf, sizeof(buf), "%s", "(invalid)"); 192 } 193 return buf; 194 } 195 196 static const char * 197 inet6_n2a(addr) 198 struct in6_addr *addr; 199 { 200 static char buf[NI_MAXHOST]; 201 202 return inet_ntop(AF_INET6, addr, buf, sizeof(buf)); 203 } 204