rip6query.c revision 55543
1/* 2 * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project. 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. Neither the name of the project nor the names of its contributors 14 * may be used to endorse or promote products derived from this software 15 * without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 * 29 * $FreeBSD: head/usr.sbin/rip6query/rip6query.c 55543 2000-01-07 10:02:43Z shin $ 30 */ 31 32#include <stdio.h> 33 34#include <unistd.h> 35#include <stdlib.h> 36#include <string.h> 37#include <ctype.h> 38#include <signal.h> 39#include <err.h> 40 41#include <sys/types.h> 42#include <sys/socket.h> 43#include <net/if.h> 44#include <net/if_var.h> 45#include <netinet/in.h> 46#include <netinet/in_var.h> 47#include <arpa/inet.h> 48#include <netdb.h> 49 50#include "route6d.h" 51 52/* wrapper for KAME-special getnameinfo() */ 53#ifndef NI_WITHSCOPEID 54#define NI_WITHSCOPEID 0 55#endif 56 57int s; 58extern int errno; 59struct sockaddr_in6 sin6; 60struct rip6 *ripbuf; 61 62#define RIPSIZE(n) (sizeof(struct rip6) + (n-1) * sizeof(struct netinfo6)) 63 64int main __P((int, char **)); 65static void usage __P((void)); 66static const char *sa_n2a __P((struct sockaddr *)); 67static const char *inet6_n2a __P((struct in6_addr *)); 68 69int 70main(argc, argv) 71 int argc; 72 char **argv; 73{ 74 struct netinfo6 *np; 75 struct sockaddr_in6 fsock; 76 int i, n, len, flen; 77 int c; 78 extern char *optarg; 79 extern int optind; 80 int ifidx = -1; 81 int error; 82 char pbuf[10]; 83 struct addrinfo hints, *res; 84 85 while ((c = getopt(argc, argv, "I:")) != EOF) { 86 switch (c) { 87 case 'I': 88 ifidx = if_nametoindex(optarg); 89 if (ifidx == 0) { 90 errx(1, "invalid interface %s", optarg); 91 /*NOTREACHED*/ 92 } 93 break; 94 default: 95 usage(); 96 exit(1); 97 /*NOTREACHED*/ 98 } 99 } 100 argv += optind; 101 argc -= optind; 102 103 if (argc != 1) { 104 usage(); 105 exit(-1); 106 } 107 108 if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0) { 109 err(1, "socket"); 110 /*NOTREACHED*/ 111 } 112 113 /* getaddrinfo is preferred for addr@ifname syntax */ 114 snprintf(pbuf, sizeof(pbuf), "%d", RIP6_PORT); 115 memset(&hints, 0, sizeof(hints)); 116 hints.ai_family = AF_INET6; 117 hints.ai_socktype = SOCK_STREAM; 118 error = getaddrinfo(argv[0], pbuf, &hints, &res); 119 if (error) { 120 fprintf(stderr, "rip6query: %s: %s\n", argv[0], 121 gai_strerror(error)); 122 if (error == EAI_SYSTEM) 123 errx(1, "%s", strerror(errno)); 124 exit(1); 125 /*NOTREACHED*/ 126 } 127 if (res->ai_next) { 128 errx(1, "%s: %s", argv[0], "resolved to multiple addrs"); 129 /*NOTREACHED*/ 130 } 131 if (sizeof(sin6) != res->ai_addrlen) { 132 errx(1, "%s: %s", argv[0], "invalid addrlen"); 133 /*NOTREACHED*/ 134 } 135 memcpy(&sin6, res->ai_addr, res->ai_addrlen); 136 if (ifidx >= 0) 137 sin6.sin6_scope_id = ifidx; 138 139 if ((ripbuf = (struct rip6 *)malloc(BUFSIZ)) == NULL) { 140 err(1, "malloc"); 141 /*NOTREACHED*/ 142 } 143 ripbuf->rip6_cmd = RIP6_REQUEST; 144 ripbuf->rip6_vers = RIP6_VERSION; 145 ripbuf->rip6_res1[0] = 0; 146 ripbuf->rip6_res1[1] = 0; 147 np = ripbuf->rip6_nets; 148 bzero(&np->rip6_dest, sizeof(struct in6_addr)); 149 np->rip6_tag = 0; 150 np->rip6_plen = 0; 151 np->rip6_metric = HOPCNT_INFINITY6; 152 if (sendto(s, ripbuf, RIPSIZE(1), 0, (struct sockaddr *)&sin6, 153 sizeof(struct sockaddr_in6)) < 0) { 154 err(1, "send"); 155 /*NOTREACHED*/ 156 } 157 do { 158 flen = sizeof(fsock); 159 if ((len = recvfrom(s, ripbuf, BUFSIZ, 0, 160 (struct sockaddr *)&fsock, &flen)) < 0) { 161 err(1, "recvfrom"); 162 /*NOTREACHED*/ 163 } 164 printf("Response from %s len %d\n", 165 sa_n2a((struct sockaddr *)&fsock), len); 166 n = (len - sizeof(struct rip6) + sizeof(struct netinfo6)) / 167 sizeof(struct netinfo6); 168 np = ripbuf->rip6_nets; 169 for (i = 0; i < n; i++, np++) { 170 printf("\t%s/%d [%d]", inet6_n2a(&np->rip6_dest), 171 np->rip6_plen, np->rip6_metric); 172 if (np->rip6_tag) 173 printf(" tag=0x%x", ntohs(np->rip6_tag)); 174 printf("\n"); 175 } 176 } while (len == RIPSIZE(24)); 177 178 exit(0); 179} 180 181static void 182usage() 183{ 184 fprintf(stderr, "Usage: rip6query [-I iface] address\n"); 185} 186 187/* getnameinfo() is preferred as we may be able to show ifindex as ifname */ 188static const char * 189sa_n2a(sa) 190 struct sockaddr *sa; 191{ 192 static char buf[BUFSIZ]; 193 194 if (getnameinfo(sa, sa->sa_len, buf, sizeof(buf), 195 NULL, 0, NI_NUMERICHOST | NI_WITHSCOPEID) != 0) { 196 snprintf(buf, sizeof(buf), "%s", "(invalid)"); 197 } 198 return buf; 199} 200 201static const char * 202inet6_n2a(addr) 203 struct in6_addr *addr; 204{ 205 static char buf[BUFSIZ]; 206 207 return inet_ntop(AF_INET6, addr, buf, sizeof(buf)); 208} 209