1 /* $KAME: rip6query.c,v 1.11 2001/05/08 04:36:37 itojun Exp $ */ 2 3 /*- 4 * SPDX-License-Identifier: BSD-3-Clause 5 * 6 * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project. 7 * All rights reserved. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 3. Neither the name of the project nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 * $FreeBSD$ 34 */ 35 36 #include <stdio.h> 37 38 #include <unistd.h> 39 #include <stdlib.h> 40 #include <string.h> 41 #include <ctype.h> 42 #include <signal.h> 43 #include <errno.h> 44 #include <err.h> 45 46 #include <sys/types.h> 47 #include <sys/socket.h> 48 #include <sys/queue.h> 49 50 #include <net/if.h> 51 #include <netinet/in.h> 52 #include <netinet/in_var.h> 53 #include <arpa/inet.h> 54 #include <netdb.h> 55 56 #include "route6d.h" 57 58 static int s; 59 static struct sockaddr_in6 sin6; 60 static struct rip6 *ripbuf; 61 62 #define RIPSIZE(n) (sizeof(struct rip6) + (n-1) * sizeof(struct netinfo6)) 63 64 int main(int, char **); 65 static void usage(void); 66 static const char *sa_n2a(struct sockaddr *); 67 static const char *inet6_n2a(struct in6_addr *); 68 69 int 70 main(int argc, char *argv[]) 71 { 72 struct netinfo6 *np; 73 struct sockaddr_in6 fsock; 74 int i, n, len; 75 int c; 76 int ifidx = -1; 77 int error; 78 socklen_t flen; 79 char pbuf[10]; 80 struct addrinfo hints, *res; 81 82 while ((c = getopt(argc, argv, "I:")) != -1) { 83 switch (c) { 84 case 'I': 85 ifidx = if_nametoindex(optarg); 86 if (ifidx == 0) { 87 errx(1, "invalid interface %s", optarg); 88 /*NOTREACHED*/ 89 } 90 break; 91 default: 92 usage(); 93 exit(1); 94 /*NOTREACHED*/ 95 } 96 } 97 argv += optind; 98 argc -= optind; 99 100 if (argc != 1) { 101 usage(); 102 exit(1); 103 } 104 105 if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0) { 106 err(1, "socket"); 107 /*NOTREACHED*/ 108 } 109 110 /* getaddrinfo is preferred for addr@ifname syntax */ 111 snprintf(pbuf, sizeof(pbuf), "%d", RIP6_PORT); 112 memset(&hints, 0, sizeof(hints)); 113 hints.ai_family = AF_INET6; 114 hints.ai_socktype = SOCK_DGRAM; 115 error = getaddrinfo(argv[0], pbuf, &hints, &res); 116 if (error) { 117 errx(1, "%s: %s", argv[0], gai_strerror(error)); 118 /*NOTREACHED*/ 119 } 120 if (res->ai_next) { 121 errx(1, "%s: %s", argv[0], "resolved to multiple addrs"); 122 /*NOTREACHED*/ 123 } 124 if (sizeof(sin6) != res->ai_addrlen) { 125 errx(1, "%s: %s", argv[0], "invalid addrlen"); 126 /*NOTREACHED*/ 127 } 128 memcpy(&sin6, res->ai_addr, res->ai_addrlen); 129 if (ifidx >= 0) 130 sin6.sin6_scope_id = ifidx; 131 132 if ((ripbuf = (struct rip6 *)malloc(BUFSIZ)) == NULL) { 133 err(1, "malloc"); 134 /*NOTREACHED*/ 135 } 136 ripbuf->rip6_cmd = RIP6_REQUEST; 137 ripbuf->rip6_vers = RIP6_VERSION; 138 ripbuf->rip6_res1[0] = 0; 139 ripbuf->rip6_res1[1] = 0; 140 np = ripbuf->rip6_nets; 141 bzero(&np->rip6_dest, sizeof(struct in6_addr)); 142 np->rip6_tag = 0; 143 np->rip6_plen = 0; 144 np->rip6_metric = HOPCNT_INFINITY6; 145 if (sendto(s, ripbuf, RIPSIZE(1), 0, (struct sockaddr *)&sin6, 146 sizeof(struct sockaddr_in6)) < 0) { 147 err(1, "send"); 148 /*NOTREACHED*/ 149 } 150 do { 151 flen = sizeof(fsock); 152 if ((len = recvfrom(s, ripbuf, BUFSIZ, 0, 153 (struct sockaddr *)&fsock, &flen)) < 0) { 154 err(1, "recvfrom"); 155 /*NOTREACHED*/ 156 } 157 printf("Response from %s len %d\n", 158 sa_n2a((struct sockaddr *)&fsock), len); 159 n = (len - sizeof(struct rip6) + sizeof(struct netinfo6)) / 160 sizeof(struct netinfo6); 161 np = ripbuf->rip6_nets; 162 for (i = 0; i < n; i++, np++) { 163 printf("\t%s/%d [%d]", inet6_n2a(&np->rip6_dest), 164 np->rip6_plen, np->rip6_metric); 165 if (np->rip6_tag) 166 printf(" tag=0x%x", ntohs(np->rip6_tag)); 167 printf("\n"); 168 } 169 } while (len == RIPSIZE(24)); 170 171 exit(0); 172 } 173 174 static void 175 usage(void) 176 { 177 fprintf(stderr, "usage: rip6query [-I iface] address\n"); 178 } 179 180 /* getnameinfo() is preferred as we may be able to show ifindex as ifname */ 181 static const char * 182 sa_n2a(struct sockaddr *sa) 183 { 184 static char buf[NI_MAXHOST]; 185 186 if (getnameinfo(sa, sa->sa_len, buf, sizeof(buf), 187 NULL, 0, NI_NUMERICHOST) != 0) { 188 snprintf(buf, sizeof(buf), "%s", "(invalid)"); 189 } 190 return buf; 191 } 192 193 static const char * 194 inet6_n2a(struct in6_addr *addr) 195 { 196 static char buf[NI_MAXHOST]; 197 198 return inet_ntop(AF_INET6, addr, buf, sizeof(buf)); 199 } 200