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. All advertising materials mentioning features or use of this software 14 * must display the following acknowledgement: 15 * This product includes software developed by the University of 16 * California, Berkeley and its contributors. 17 * 4. Neither the name of the University 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 REGENTS 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 REGENTS 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 * @(#) Copyright (c) 1980, 1993 The Regents of the University of California. All rights reserved. 34 * @(#)whois.c 8.1 (Berkeley) 6/6/93 35 * $FreeBSD: src/usr.bin/whois/whois.c,v 1.15.2.11 2003/02/25 20:59:41 roberto Exp $ 36 * $DragonFly: src/usr.bin/whois/whois.c,v 1.7 2005/02/17 11:53:33 liamfoy Exp $ 37 */ 38 39 #include <sys/types.h> 40 #include <sys/socket.h> 41 42 #include <arpa/inet.h> 43 #include <netinet/in.h> 44 45 #include <ctype.h> 46 #include <err.h> 47 #include <netdb.h> 48 #include <stdarg.h> 49 #include <stdio.h> 50 #include <stdlib.h> 51 #include <string.h> 52 #include <sysexits.h> 53 #include <unistd.h> 54 55 #define ABUSEHOST "whois.abuse.net" 56 #define NICHOST "whois.crsnic.net" 57 #define INICHOST "whois.networksolutions.com" 58 #define DNICHOST "whois.nic.mil" 59 #define GNICHOST "whois.nic.gov" 60 #define ANICHOST "whois.arin.net" 61 #define LNICHOST "whois.lacnic.net" 62 #define KNICHOST "whois.krnic.net" 63 #define RNICHOST "whois.ripe.net" 64 #define PNICHOST "whois.apnic.net" 65 #define RUNICHOST "whois.ripn.net" 66 #define MNICHOST "whois.ra.net" 67 #define QNICHOST_TAIL ".whois-servers.net" 68 #define SNICHOST "whois.6bone.net" 69 #define IANAHOST "whois.iana.org" 70 #define GERMNICHOST "de.whois-servers.net" 71 #define BNICHOST "whois.registro.br" 72 #define WHOIS_SERVER_ID "Whois Server: " 73 #define WHOIS_ORG_SERVER_ID "Registrant Street1:Whois Server:" 74 75 #define DEFAULT_PORT "whois" 76 #define WHOIS_RECURSE 0x01 77 #define WHOIS_QUICK 0x02 78 79 #define ishost(h) (isalnum(h) || h == '.' || h == '-') 80 81 const char *ip_whois[] = { LNICHOST, RNICHOST, PNICHOST, BNICHOST, NULL }; 82 const char *port = DEFAULT_PORT; 83 84 static char *choose_server(const char *); 85 static struct addrinfo *gethostinfo(const char *, int); 86 static void s_asprintf(char **, const char *, ...) __printflike(2, 3); 87 static void usage(void); 88 static void whois(const char *, const char *, int); 89 90 int 91 main(int argc, char *argv[]) 92 { 93 const char *country, *host; 94 char *qnichost; 95 int ch, flags, use_qnichost; 96 97 #ifdef SOCKS 98 SOCKSinit(argv[0]); 99 #endif 100 101 country = host = qnichost = NULL; 102 flags = use_qnichost = 0; 103 while ((ch = getopt(argc, argv, "aAbc:dgh:ilkImp:QrR6")) != -1) { 104 switch (ch) { 105 case 'a': 106 host = ANICHOST; 107 break; 108 case 'A': 109 host = PNICHOST; 110 break; 111 case 'b': 112 host = ABUSEHOST; 113 break; 114 case 'c': 115 country = optarg; 116 break; 117 case 'd': 118 host = DNICHOST; 119 break; 120 case 'g': 121 host = GNICHOST; 122 break; 123 case 'h': 124 host = optarg; 125 break; 126 case 'i': 127 host = INICHOST; 128 break; 129 case 'I': 130 host = IANAHOST; 131 break; 132 case 'k': 133 host = KNICHOST; 134 break; 135 case 'l': 136 host = LNICHOST; 137 break; 138 case 'm': 139 host = MNICHOST; 140 break; 141 case 'p': 142 port = optarg; 143 break; 144 case 'Q': 145 flags |= WHOIS_QUICK; 146 break; 147 case 'r': 148 host = RNICHOST; 149 break; 150 case 'R': 151 host = RUNICHOST; 152 break; 153 case '6': 154 host = SNICHOST; 155 break; 156 case '?': 157 default: 158 usage(); 159 /* NOTREACHED */ 160 } 161 } 162 argc -= optind; 163 argv += optind; 164 165 if (!argc || (country != NULL && host != NULL)) 166 usage(); 167 168 /* 169 * If no host or country is specified determine the top level domain 170 * from the query. If the TLD is a number, query ARIN. Otherwise, use 171 * TLD.whois-server.net. If the domain does not contain '.', fall 172 * back to NICHOST. 173 */ 174 if (host == NULL && country == NULL) { 175 use_qnichost = 1; 176 host = NICHOST; 177 if (!(flags & WHOIS_QUICK)) 178 flags |= WHOIS_RECURSE; 179 } 180 while (argc-- > 0) { 181 if (country != NULL) { 182 s_asprintf(&qnichost, "%s%s", country, QNICHOST_TAIL); 183 whois(*argv, qnichost, flags); 184 } else if (use_qnichost) 185 if ((qnichost = choose_server(*argv)) != NULL) 186 whois(*argv, qnichost, flags); 187 if (qnichost == NULL) 188 whois(*argv, host, flags); 189 free(qnichost); 190 qnichost = NULL; 191 argv++; 192 } 193 exit(0); 194 } 195 196 /* 197 * This function will remove any trailing periods from domain, after which it 198 * returns a pointer to newly allocated memory containing the whois server to 199 * be queried, or a NULL if the correct server couldn't be determined. The 200 * caller must remember to free(3) the allocated memory. 201 */ 202 static char * 203 choose_server(const char *domain) 204 { 205 char *pos, *retval; 206 207 for (pos = strchr(domain, '\0'); pos > domain && *--pos == '.';) 208 *pos = '\0'; 209 if (*domain == '\0') 210 errx(EX_USAGE, "can't search for a null string"); 211 while (pos > domain && *pos != '.') 212 --pos; 213 if (pos <= domain) 214 return (NULL); 215 if (isdigit(*++pos)) 216 s_asprintf(&retval, "%s", ANICHOST); 217 else 218 s_asprintf(&retval, "%s%s", pos, QNICHOST_TAIL); 219 return (retval); 220 } 221 222 static struct addrinfo * 223 gethostinfo(const char *host, int exit_on_error) 224 { 225 struct addrinfo hints, *res; 226 int error; 227 228 memset(&hints, 0, sizeof(hints)); 229 hints.ai_flags = 0; 230 hints.ai_family = AF_UNSPEC; 231 hints.ai_socktype = SOCK_STREAM; 232 error = getaddrinfo(host, port, &hints, &res); 233 if (error) { 234 if (error == EAI_SERVICE) 235 warnx("bad port: %s", port); 236 else 237 warnx("%s: %s", host, gai_strerror(error)); 238 if (exit_on_error) 239 exit(EX_NOHOST); 240 return (NULL); 241 } 242 return (res); 243 } 244 245 /* 246 * Wrapper for asprintf(3) that exits on error. 247 */ 248 static void 249 s_asprintf(char **ret, const char *format, ...) 250 { 251 252 va_list ap; 253 254 va_start(ap, format); 255 if (vasprintf(ret, format, ap) == -1) { 256 va_end(ap); 257 err(EX_OSERR, "vasprintf()"); 258 } 259 va_end(ap); 260 } 261 262 static void 263 whois(const char *query, const char *hostname, int flags) 264 { 265 FILE *sfi, *sfo; 266 struct addrinfo *hostres, *res; 267 char *buf, *host, *nhost, *p; 268 int i, s = -1; 269 size_t c, len; 270 271 hostres = gethostinfo(hostname, 1); 272 for (res = hostres; res; res = res->ai_next) { 273 s = socket(res->ai_family, res->ai_socktype, res->ai_protocol); 274 if (s < 0) 275 continue; 276 if (connect(s, res->ai_addr, res->ai_addrlen) == 0) 277 break; 278 close(s); 279 } 280 freeaddrinfo(hostres); 281 if (res == NULL) 282 err(EX_OSERR, "connect()"); 283 284 sfi = fdopen(s, "r"); 285 sfo = fdopen(s, "w"); 286 if (sfi == NULL || sfo == NULL) 287 err(EX_OSERR, "fdopen()"); 288 if (strcmp(hostname, GERMNICHOST) == 0) { 289 fprintf(sfo, "-T dn,ace -C US-ASCII %s\r\n", query); 290 } else { 291 fprintf(sfo, "%s\r\n", query); 292 } 293 fflush(sfo); 294 nhost = NULL; 295 while ((buf = fgetln(sfi, &len)) != NULL) { 296 while (len > 0 && isspace(buf[len - 1])) 297 buf[--len] = '\0'; 298 printf("%.*s\n", (int)len, buf); 299 300 if ((flags & WHOIS_RECURSE) && nhost == NULL) { 301 host = strnstr(buf, WHOIS_SERVER_ID, len); 302 if (host != NULL) { 303 host += sizeof(WHOIS_SERVER_ID) - 1; 304 for (p = host; p < buf + len; p++) { 305 if (!ishost(*p)) { 306 *p = '\0'; 307 break; 308 } 309 } 310 s_asprintf(&nhost, "%.*s", 311 (int)(buf + len - host), host); 312 } else if ((host = 313 strnstr(buf, WHOIS_ORG_SERVER_ID, len)) != NULL) { 314 host += sizeof(WHOIS_ORG_SERVER_ID) - 1; 315 for (p = host; p < buf + len; p++) { 316 if (!ishost(*p)) { 317 *p = '\0'; 318 break; 319 } 320 } 321 s_asprintf(&nhost, "%.*s", 322 (int)(buf + len - host), host); 323 } else if (strcmp(hostname, ANICHOST) == 0) { 324 for (c = 0; c <= len; c++) 325 buf[c] = tolower((int)buf[c]); 326 for (i = 0; ip_whois[i] != NULL; i++) { 327 if (strnstr(buf, ip_whois[i], len) != 328 NULL) { 329 s_asprintf(&nhost, "%s", 330 ip_whois[i]); 331 break; 332 } 333 } 334 } 335 } 336 } 337 if (nhost != NULL) { 338 whois(query, nhost, 0); 339 free(nhost); 340 } 341 } 342 343 static void 344 usage(void) 345 { 346 fprintf(stderr, 347 "usage: whois [-aAbdgilkImQrR6] [-c country-code | -h hostname] " 348 "[-p port] name ...\n"); 349 exit(EX_USAGE); 350 } 351