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 static int s; 60 static struct sockaddr_in6 sin6; 61 static 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(int argc, char *argv[]) 72 { 73 struct netinfo6 *np; 74 struct sockaddr_in6 fsock; 75 int i, n, len; 76 int c; 77 int ifidx = -1; 78 int error; 79 socklen_t flen; 80 char pbuf[10]; 81 struct addrinfo hints, *res; 82 83 while ((c = getopt(argc, argv, "I:")) != -1) { 84 switch (c) { 85 case 'I': 86 ifidx = if_nametoindex(optarg); 87 if (ifidx == 0) { 88 errx(1, "invalid interface %s", optarg); 89 /*NOTREACHED*/ 90 } 91 break; 92 default: 93 usage(); 94 exit(1); 95 /*NOTREACHED*/ 96 } 97 } 98 argv += optind; 99 argc -= optind; 100 101 if (argc != 1) { 102 usage(); 103 exit(1); 104 } 105 106 if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0) { 107 err(1, "socket"); 108 /*NOTREACHED*/ 109 } 110 111 /* getaddrinfo is preferred for addr@ifname syntax */ 112 snprintf(pbuf, sizeof(pbuf), "%d", RIP6_PORT); 113 memset(&hints, 0, sizeof(hints)); 114 hints.ai_family = AF_INET6; 115 hints.ai_socktype = SOCK_DGRAM; 116 error = getaddrinfo(argv[0], pbuf, &hints, &res); 117 if (error) { 118 errx(1, "%s: %s", argv[0], gai_strerror(error)); 119 /*NOTREACHED*/ 120 } 121 if (res->ai_next) { 122 errx(1, "%s: %s", argv[0], "resolved to multiple addrs"); 123 /*NOTREACHED*/ 124 } 125 if (sizeof(sin6) != res->ai_addrlen) { 126 errx(1, "%s: %s", argv[0], "invalid addrlen"); 127 /*NOTREACHED*/ 128 } 129 memcpy(&sin6, res->ai_addr, res->ai_addrlen); 130 if (ifidx >= 0) 131 sin6.sin6_scope_id = ifidx; 132 133 if ((ripbuf = (struct rip6 *)malloc(BUFSIZ)) == NULL) { 134 err(1, "malloc"); 135 /*NOTREACHED*/ 136 } 137 ripbuf->rip6_cmd = RIP6_REQUEST; 138 ripbuf->rip6_vers = RIP6_VERSION; 139 ripbuf->rip6_res1[0] = 0; 140 ripbuf->rip6_res1[1] = 0; 141 np = ripbuf->rip6_nets; 142 bzero(&np->rip6_dest, sizeof(struct in6_addr)); 143 np->rip6_tag = 0; 144 np->rip6_plen = 0; 145 np->rip6_metric = HOPCNT_INFINITY6; 146 if (sendto(s, ripbuf, RIPSIZE(1), 0, (struct sockaddr *)&sin6, 147 sizeof(struct sockaddr_in6)) < 0) { 148 err(1, "send"); 149 /*NOTREACHED*/ 150 } 151 do { 152 flen = sizeof(fsock); 153 if ((len = recvfrom(s, ripbuf, BUFSIZ, 0, 154 (struct sockaddr *)&fsock, &flen)) < 0) { 155 err(1, "recvfrom"); 156 /*NOTREACHED*/ 157 } 158 printf("Response from %s len %d\n", 159 sa_n2a((struct sockaddr *)&fsock), len); 160 n = (len - sizeof(struct rip6) + sizeof(struct netinfo6)) / 161 sizeof(struct netinfo6); 162 np = ripbuf->rip6_nets; 163 for (i = 0; i < n; i++, np++) { 164 printf("\t%s/%d [%d]", inet6_n2a(&np->rip6_dest), 165 np->rip6_plen, np->rip6_metric); 166 if (np->rip6_tag) 167 printf(" tag=0x%x", ntohs(np->rip6_tag)); 168 printf("\n"); 169 } 170 } while (len == RIPSIZE(24)); 171 172 exit(0); 173 } 174 175 static void 176 usage(void) 177 { 178 fprintf(stderr, "usage: rip6query [-I iface] address\n"); 179 } 180 181 /* getnameinfo() is preferred as we may be able to show ifindex as ifname */ 182 static const char * 183 sa_n2a(struct sockaddr *sa) 184 { 185 static char buf[NI_MAXHOST]; 186 187 if (getnameinfo(sa, sa->sa_len, buf, sizeof(buf), 188 NULL, 0, NI_NUMERICHOST) != 0) { 189 snprintf(buf, sizeof(buf), "%s", "(invalid)"); 190 } 191 return buf; 192 } 193 194 static const char * 195 inet6_n2a(struct in6_addr *addr) 196 { 197 static char buf[NI_MAXHOST]; 198 199 return inet_ntop(AF_INET6, addr, buf, sizeof(buf)); 200 } 201