rip6query.c revision 95258
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: head/usr.sbin/rip6query/rip6query.c 95258 2002-04-22 13:44:47Z des $ 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/* wrapper for KAME-special getnameinfo() */ 60#ifndef NI_WITHSCOPEID 61#define NI_WITHSCOPEID 0 62#endif 63 64int s; 65struct sockaddr_in6 sin6; 66struct rip6 *ripbuf; 67 68#define RIPSIZE(n) (sizeof(struct rip6) + (n-1) * sizeof(struct netinfo6)) 69 70int main __P((int, char **)); 71static void usage __P((void)); 72static const char *sa_n2a __P((struct sockaddr *)); 73static const char *inet6_n2a __P((struct in6_addr *)); 74 75int 76main(argc, argv) 77 int argc; 78 char **argv; 79{ 80 struct netinfo6 *np; 81 struct sockaddr_in6 fsock; 82 int i, n, len, flen; 83 int c; 84 int ifidx = -1; 85 int error; 86 char pbuf[10]; 87 struct addrinfo hints, *res; 88 89 while ((c = getopt(argc, argv, "I:")) != -1) { 90 switch (c) { 91 case 'I': 92 ifidx = if_nametoindex(optarg); 93 if (ifidx == 0) { 94 errx(1, "invalid interface %s", optarg); 95 /*NOTREACHED*/ 96 } 97 break; 98 default: 99 usage(); 100 exit(1); 101 /*NOTREACHED*/ 102 } 103 } 104 argv += optind; 105 argc -= optind; 106 107 if (argc != 1) { 108 usage(); 109 exit(1); 110 } 111 112 if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0) { 113 err(1, "socket"); 114 /*NOTREACHED*/ 115 } 116 117 /* getaddrinfo is preferred for addr@ifname syntax */ 118 snprintf(pbuf, sizeof(pbuf), "%d", RIP6_PORT); 119 memset(&hints, 0, sizeof(hints)); 120 hints.ai_family = AF_INET6; 121 hints.ai_socktype = SOCK_DGRAM; 122 error = getaddrinfo(argv[0], pbuf, &hints, &res); 123 if (error) { 124 errx(1, "%s: %s", argv[0], gai_strerror(error)); 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[NI_MAXHOST]; 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[NI_MAXHOST]; 206 207 return inet_ntop(AF_INET6, addr, buf, sizeof(buf)); 208} 209