1/* $FreeBSD$ */ 2/* $NetBSD: as.c,v 1.1 2001/11/04 23:14:36 atatat Exp $ */ 3 4/* 5 * Copyright (c) 2001 The NetBSD Foundation, Inc. 6 * All rights reserved. 7 * 8 * This code is derived from software contributed to The NetBSD Foundation 9 * by Andrew Brown. 10 * 11 * Redistribution and use in source and binary forms, with or without 12 * modification, are permitted provided that the following conditions 13 * are met: 14 * 1. Redistributions of source code must retain the above copyright 15 * notice, this list of conditions and the following disclaimer. 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in the 18 * documentation and/or other materials provided with the distribution. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 21 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 22 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 23 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 24 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 25 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 26 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 27 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 28 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 29 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 30 * POSSIBILITY OF SUCH DAMAGE. 31 */ 32 33#include <sys/cdefs.h> 34#include <sys/types.h> 35#include <sys/socket.h> 36#include <netinet/in.h> 37#include <arpa/inet.h> 38#include <netdb.h> 39#include <unistd.h> 40#include <string.h> 41#include <stdlib.h> 42#include <errno.h> 43#include <err.h> 44#include <stdio.h> 45 46#include "as.h" 47 48#define DEFAULT_AS_SERVER "whois.radb.net" 49#undef AS_DEBUG_FILE 50 51struct aslookup { 52 FILE *as_f; 53#ifdef AS_DEBUG_FILE 54 FILE *as_debug; 55#endif /* AS_DEBUG_FILE */ 56}; 57 58void * 59as_setup(const char *server) 60{ 61 struct aslookup *asn; 62 struct addrinfo hints, *res0, *res; 63 FILE *f; 64 int s, error; 65 66 s = -1; 67 if (server == NULL) 68 server = getenv("RA_SERVER"); 69 if (server == NULL) 70 server = DEFAULT_AS_SERVER; 71 72 memset(&hints, 0, sizeof(hints)); 73 hints.ai_family = PF_UNSPEC; 74 hints.ai_socktype = SOCK_STREAM; 75 error = getaddrinfo(server, "whois", &hints, &res0); 76 if (error == EAI_SERVICE) { 77 warnx("warning: whois/tcp service not found"); 78 error = getaddrinfo(server, "43", &hints, &res0); 79 } 80 if (error != 0) { 81 warnx("%s: %s", server, gai_strerror(error)); 82 return (NULL); 83 } 84 85 for (res = res0; res; res = res->ai_next) { 86 s = socket(res->ai_family, res->ai_socktype, res->ai_protocol); 87 if (s < 0) 88 continue; 89 if (connect(s, res->ai_addr, res->ai_addrlen) >= 0) 90 break; 91 close(s); 92 s = -1; 93 } 94 freeaddrinfo(res0); 95 if (s < 0) { 96 warn("connect"); 97 return (NULL); 98 } 99 100 f = fdopen(s, "r+"); 101 (void)fprintf(f, "!!\n"); 102 (void)fflush(f); 103 104 asn = malloc(sizeof(struct aslookup)); 105 if (asn == NULL) 106 (void)fclose(f); 107 else 108 asn->as_f = f; 109 110#ifdef AS_DEBUG_FILE 111 asn->as_debug = fopen(AS_DEBUG_FILE, "w"); 112 if (asn->as_debug) { 113 (void)fprintf(asn->as_debug, ">> !!\n"); 114 (void)fflush(asn->as_debug); 115 } 116#endif /* AS_DEBUG_FILE */ 117 118 return (asn); 119} 120 121unsigned int 122as_lookup(void *_asn, char *addr, sa_family_t family) 123{ 124 struct aslookup *asn = _asn; 125 char buf[1024]; 126 unsigned int as; 127 int rc, dlen, plen; 128 129 as = 0; 130 rc = dlen = 0; 131 plen = (family == AF_INET6) ? 128 : 32; 132 (void)fprintf(asn->as_f, "!r%s/%d,l\n", addr, plen); 133 (void)fflush(asn->as_f); 134 135#ifdef AS_DEBUG_FILE 136 if (asn->as_debug) { 137 (void)fprintf(asn->as_debug, ">> !r%s/%d,l\n", addr, plen); 138 (void)fflush(asn->as_debug); 139 } 140#endif /* AS_DEBUG_FILE */ 141 142 while (fgets(buf, sizeof(buf), asn->as_f) != NULL) { 143 buf[sizeof(buf) - 1] = '\0'; 144 145#ifdef AS_DEBUG_FILE 146 if (asn->as_debug) { 147 (void)fprintf(asn->as_debug, "<< %s", buf); 148 (void)fflush(asn->as_debug); 149 } 150#endif /* AS_DEBUG_FILE */ 151 152 if (rc == 0) { 153 rc = buf[0]; 154 switch (rc) { 155 case 'A': 156 /* A - followed by # bytes of answer */ 157 sscanf(buf, "A%d\n", &dlen); 158#ifdef AS_DEBUG_FILE 159 if (asn->as_debug) { 160 (void)fprintf(asn->as_debug, 161 "dlen: %d\n", dlen); 162 (void)fflush(asn->as_debug); 163 } 164#endif /* AS_DEBUG_FILE */ 165 break; 166 case 'C': 167 case 'D': 168 case 'E': 169 case 'F': 170 /* C - no data returned */ 171 /* D - key not found */ 172 /* E - multiple copies of key */ 173 /* F - some other error */ 174 break; 175 } 176 if (rc == 'A') 177 /* skip to next input line */ 178 continue; 179 } 180 181 if (dlen == 0) 182 /* out of data, next char read is end code */ 183 rc = buf[0]; 184 if (rc != 'A') 185 /* either an error off the bat, or a done code */ 186 break; 187 188 /* data received, thank you */ 189 dlen -= strlen(buf); 190 191 /* origin line is the interesting bit */ 192 if (as == 0 && strncasecmp(buf, "origin:", 7) == 0) { 193 sscanf(buf + 7, " AS%u", &as); 194#ifdef AS_DEBUG_FILE 195 if (asn->as_debug) { 196 (void)fprintf(asn->as_debug, "as: %d\n", as); 197 (void)fflush(asn->as_debug); 198 } 199#endif /* AS_DEBUG_FILE */ 200 } 201 } 202 203 return (as); 204} 205 206void 207as_shutdown(void *_asn) 208{ 209 struct aslookup *asn = _asn; 210 211 (void)fprintf(asn->as_f, "!q\n"); 212 (void)fclose(asn->as_f); 213 214#ifdef AS_DEBUG_FILE 215 if (asn->as_debug) { 216 (void)fprintf(asn->as_debug, ">> !q\n"); 217 (void)fclose(asn->as_debug); 218 } 219#endif /* AS_DEBUG_FILE */ 220 221 free(asn); 222} 223