1 /* 2 * Copyright (c) 1980, 1993 3 * The Regents of the University of California. 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 University 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 REGENTS 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 REGENTS 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 * @(#) Copyright (c) 1980, 1993 The Regents of the University of California. All rights reserved. 30 * @(#)whois.c 8.1 (Berkeley) 6/6/93 31 * $FreeBSD: src/usr.bin/whois/whois.c,v 1.15.2.11 2003/02/25 20:59:41 roberto Exp $ 32 * $DragonFly: src/usr.bin/whois/whois.c,v 1.7 2005/02/17 11:53:33 liamfoy Exp $ 33 */ 34 35 #include <sys/types.h> 36 #include <sys/socket.h> 37 38 #include <arpa/inet.h> 39 #include <netinet/in.h> 40 41 #include <ctype.h> 42 #include <err.h> 43 #include <netdb.h> 44 #include <stdarg.h> 45 #include <stdio.h> 46 #include <stdlib.h> 47 #include <string.h> 48 #include <sysexits.h> 49 #include <unistd.h> 50 51 #define ABUSEHOST "whois.abuse.net" 52 #define NICHOST "whois.crsnic.net" 53 #define INICHOST "whois.networksolutions.com" 54 #define DNICHOST "whois.nic.mil" 55 #define GNICHOST "whois.nic.gov" 56 #define ANICHOST "whois.arin.net" 57 #define LNICHOST "whois.lacnic.net" 58 #define KNICHOST "whois.krnic.net" 59 #define RNICHOST "whois.ripe.net" 60 #define PNICHOST "whois.apnic.net" 61 #define RUNICHOST "whois.ripn.net" 62 #define MNICHOST "whois.ra.net" 63 #define QNICHOST_TAIL ".whois-servers.net" 64 #define SNICHOST "whois.6bone.net" 65 #define IANAHOST "whois.iana.org" 66 #define GERMNICHOST "de.whois-servers.net" 67 #define BNICHOST "whois.registro.br" 68 #define WHOIS_SERVER_ID "Whois Server: " 69 #define WHOIS_ORG_SERVER_ID "Registrant Street1:Whois Server:" 70 71 #define DEFAULT_PORT "whois" 72 #define WHOIS_RECURSE 0x01 73 #define WHOIS_QUICK 0x02 74 75 #define ishost(h) (isalnum(h) || h == '.' || h == '-') 76 77 const char *ip_whois[] = { LNICHOST, RNICHOST, PNICHOST, BNICHOST, NULL }; 78 const char *port = DEFAULT_PORT; 79 80 static char *choose_server(const char *); 81 static struct addrinfo *gethostinfo(const char *, int); 82 static void s_asprintf(char **, const char *, ...) __printflike(2, 3); 83 static void usage(void); 84 static void whois(const char *, const char *, int); 85 86 int 87 main(int argc, char *argv[]) 88 { 89 const char *country, *host; 90 char *qnichost; 91 int ch, flags, use_qnichost; 92 93 #ifdef SOCKS 94 SOCKSinit(argv[0]); 95 #endif 96 97 country = host = qnichost = NULL; 98 flags = use_qnichost = 0; 99 while ((ch = getopt(argc, argv, "aAbc:dgh:ilkImp:QrR6")) != -1) { 100 switch (ch) { 101 case 'a': 102 host = ANICHOST; 103 break; 104 case 'A': 105 host = PNICHOST; 106 break; 107 case 'b': 108 host = ABUSEHOST; 109 break; 110 case 'c': 111 country = optarg; 112 break; 113 case 'd': 114 host = DNICHOST; 115 break; 116 case 'g': 117 host = GNICHOST; 118 break; 119 case 'h': 120 host = optarg; 121 break; 122 case 'i': 123 host = INICHOST; 124 break; 125 case 'I': 126 host = IANAHOST; 127 break; 128 case 'k': 129 host = KNICHOST; 130 break; 131 case 'l': 132 host = LNICHOST; 133 break; 134 case 'm': 135 host = MNICHOST; 136 break; 137 case 'p': 138 port = optarg; 139 break; 140 case 'Q': 141 flags |= WHOIS_QUICK; 142 break; 143 case 'r': 144 host = RNICHOST; 145 break; 146 case 'R': 147 host = RUNICHOST; 148 break; 149 case '6': 150 host = SNICHOST; 151 break; 152 case '?': 153 default: 154 usage(); 155 /* NOTREACHED */ 156 } 157 } 158 argc -= optind; 159 argv += optind; 160 161 if (!argc || (country != NULL && host != NULL)) 162 usage(); 163 164 /* 165 * If no host or country is specified determine the top level domain 166 * from the query. If the TLD is a number, query ARIN. Otherwise, use 167 * TLD.whois-server.net. If the domain does not contain '.', fall 168 * back to NICHOST. 169 */ 170 if (host == NULL && country == NULL) { 171 use_qnichost = 1; 172 host = NICHOST; 173 if (!(flags & WHOIS_QUICK)) 174 flags |= WHOIS_RECURSE; 175 } 176 while (argc-- > 0) { 177 if (country != NULL) { 178 s_asprintf(&qnichost, "%s%s", country, QNICHOST_TAIL); 179 whois(*argv, qnichost, flags); 180 } else if (use_qnichost) 181 if ((qnichost = choose_server(*argv)) != NULL) 182 whois(*argv, qnichost, flags); 183 if (qnichost == NULL) 184 whois(*argv, host, flags); 185 free(qnichost); 186 qnichost = NULL; 187 argv++; 188 } 189 exit(0); 190 } 191 192 /* 193 * This function will remove any trailing periods from domain, after which it 194 * returns a pointer to newly allocated memory containing the whois server to 195 * be queried, or a NULL if the correct server couldn't be determined. The 196 * caller must remember to free(3) the allocated memory. 197 */ 198 static char * 199 choose_server(const char *domain) 200 { 201 char *pos, *retval; 202 203 for (pos = strchr(domain, '\0'); pos > domain && *--pos == '.';) 204 *pos = '\0'; 205 if (*domain == '\0') 206 errx(EX_USAGE, "can't search for a null string"); 207 while (pos > domain && *pos != '.') 208 --pos; 209 if (pos <= domain) 210 return (NULL); 211 if (isdigit(*++pos)) 212 s_asprintf(&retval, "%s", ANICHOST); 213 else 214 s_asprintf(&retval, "%s%s", pos, QNICHOST_TAIL); 215 return (retval); 216 } 217 218 static struct addrinfo * 219 gethostinfo(const char *host, int exit_on_error) 220 { 221 struct addrinfo hints, *res; 222 int error; 223 224 memset(&hints, 0, sizeof(hints)); 225 hints.ai_flags = 0; 226 hints.ai_family = AF_UNSPEC; 227 hints.ai_socktype = SOCK_STREAM; 228 error = getaddrinfo(host, port, &hints, &res); 229 if (error) { 230 if (error == EAI_SERVICE) 231 warnx("bad port: %s", port); 232 else 233 warnx("%s: %s", host, gai_strerror(error)); 234 if (exit_on_error) 235 exit(EX_NOHOST); 236 return (NULL); 237 } 238 return (res); 239 } 240 241 /* 242 * Wrapper for asprintf(3) that exits on error. 243 */ 244 static void 245 s_asprintf(char **ret, const char *format, ...) 246 { 247 248 va_list ap; 249 250 va_start(ap, format); 251 if (vasprintf(ret, format, ap) == -1) { 252 va_end(ap); 253 err(EX_OSERR, "vasprintf()"); 254 } 255 va_end(ap); 256 } 257 258 static void 259 whois(const char *query, const char *hostname, int flags) 260 { 261 FILE *sfi, *sfo; 262 struct addrinfo *hostres, *res; 263 char *buf, *host, *nhost, *p; 264 int i, s = -1; 265 size_t c, len; 266 267 hostres = gethostinfo(hostname, 1); 268 for (res = hostres; res; res = res->ai_next) { 269 s = socket(res->ai_family, res->ai_socktype, res->ai_protocol); 270 if (s < 0) 271 continue; 272 if (connect(s, res->ai_addr, res->ai_addrlen) == 0) 273 break; 274 close(s); 275 } 276 freeaddrinfo(hostres); 277 if (res == NULL) 278 err(EX_OSERR, "connect()"); 279 280 sfi = fdopen(s, "r"); 281 sfo = fdopen(s, "w"); 282 if (sfi == NULL || sfo == NULL) 283 err(EX_OSERR, "fdopen()"); 284 if (strcmp(hostname, GERMNICHOST) == 0) { 285 fprintf(sfo, "-T dn,ace -C US-ASCII %s\r\n", query); 286 } else { 287 fprintf(sfo, "%s\r\n", query); 288 } 289 fflush(sfo); 290 nhost = NULL; 291 while ((buf = fgetln(sfi, &len)) != NULL) { 292 while (len > 0 && isspace(buf[len - 1])) 293 buf[--len] = '\0'; 294 printf("%.*s\n", (int)len, buf); 295 296 if ((flags & WHOIS_RECURSE) && nhost == NULL) { 297 host = strnstr(buf, WHOIS_SERVER_ID, len); 298 if (host != NULL) { 299 host += sizeof(WHOIS_SERVER_ID) - 1; 300 for (p = host; p < buf + len; p++) { 301 if (!ishost(*p)) { 302 *p = '\0'; 303 break; 304 } 305 } 306 s_asprintf(&nhost, "%.*s", 307 (int)(buf + len - host), host); 308 } else if ((host = 309 strnstr(buf, WHOIS_ORG_SERVER_ID, len)) != NULL) { 310 host += sizeof(WHOIS_ORG_SERVER_ID) - 1; 311 for (p = host; p < buf + len; p++) { 312 if (!ishost(*p)) { 313 *p = '\0'; 314 break; 315 } 316 } 317 s_asprintf(&nhost, "%.*s", 318 (int)(buf + len - host), host); 319 } else if (strcmp(hostname, ANICHOST) == 0) { 320 for (c = 0; c <= len; c++) 321 buf[c] = tolower((int)buf[c]); 322 for (i = 0; ip_whois[i] != NULL; i++) { 323 if (strnstr(buf, ip_whois[i], len) != 324 NULL) { 325 s_asprintf(&nhost, "%s", 326 ip_whois[i]); 327 break; 328 } 329 } 330 } 331 } 332 } 333 if (nhost != NULL) { 334 whois(query, nhost, 0); 335 free(nhost); 336 } 337 } 338 339 static void 340 usage(void) 341 { 342 fprintf(stderr, 343 "usage: whois [-aAbdgilkImQrR6] [-c country-code | -h hostname] " 344 "[-p port] name ...\n"); 345 exit(EX_USAGE); 346 } 347