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 1.5 2004/10/29 15:44:41 liamfoy Exp $ 37 */ 38 39 #include <sys/types.h> 40 #include <sys/socket.h> 41 #include <netinet/in.h> 42 #include <arpa/inet.h> 43 #include <ctype.h> 44 #include <err.h> 45 #include <netdb.h> 46 #include <stdarg.h> 47 #include <stdio.h> 48 #include <stdlib.h> 49 #include <string.h> 50 #include <sysexits.h> 51 #include <unistd.h> 52 53 #define ABUSEHOST "whois.abuse.net" 54 #define NICHOST "whois.crsnic.net" 55 #define INICHOST "whois.networksolutions.com" 56 #define DNICHOST "whois.nic.mil" 57 #define GNICHOST "whois.nic.gov" 58 #define ANICHOST "whois.arin.net" 59 #define LNICHOST "whois.lacnic.net" 60 #define RNICHOST "whois.ripe.net" 61 #define PNICHOST "whois.apnic.net" 62 #define RUNICHOST "whois.ripn.net" 63 #define MNICHOST "whois.ra.net" 64 #define QNICHOST_TAIL ".whois-servers.net" 65 #define SNICHOST "whois.6bone.net" 66 #define IANAHOST "whois.iana.org" 67 #define GERMNICHOST "de.whois-servers.net" 68 #define BNICHOST "whois.registro.br" 69 #define WHOIS_SERVER_ID "Whois Server: " 70 #define WHOIS_ORG_SERVER_ID "Registrant Street1:Whois Server:" 71 72 #define DEFAULT_PORT "whois" 73 #define WHOIS_RECURSE 0x01 74 #define WHOIS_QUICK 0x02 75 76 #define ishost(h) (isalnum((unsigned char)h) || h == '.' || h == '-') 77 78 const char *ip_whois[] = { LNICHOST, RNICHOST, PNICHOST, BNICHOST, NULL }; 79 const char *port = DEFAULT_PORT; 80 81 static char *choose_server(char *); 82 static struct addrinfo *gethostinfo(char const *host, int exit_on_error); 83 static void s_asprintf(char **ret, const char *format, ...); 84 static void usage(void); 85 static void whois(const char *, const char *, int); 86 87 int 88 main(int argc, char *argv[]) 89 { 90 const char *country, *host; 91 char *qnichost; 92 int ch, flags, use_qnichost; 93 94 #ifdef SOCKS 95 SOCKSinit(argv[0]); 96 #endif 97 98 country = host = qnichost = NULL; 99 flags = use_qnichost = 0; 100 while ((ch = getopt(argc, argv, "aAbc:dgh:ilImp:QrR6")) != -1) { 101 switch (ch) { 102 case 'a': 103 host = ANICHOST; 104 break; 105 case 'A': 106 host = PNICHOST; 107 break; 108 case 'b': 109 host = ABUSEHOST; 110 break; 111 case 'c': 112 country = optarg; 113 break; 114 case 'd': 115 host = DNICHOST; 116 break; 117 case 'g': 118 host = GNICHOST; 119 break; 120 case 'h': 121 host = optarg; 122 break; 123 case 'i': 124 host = INICHOST; 125 break; 126 case 'I': 127 host = IANAHOST; 128 break; 129 case 'l': 130 host = LNICHOST; 131 break; 132 case 'm': 133 host = MNICHOST; 134 break; 135 case 'p': 136 port = optarg; 137 break; 138 case 'Q': 139 flags |= WHOIS_QUICK; 140 break; 141 case 'r': 142 host = RNICHOST; 143 break; 144 case 'R': 145 host = RUNICHOST; 146 break; 147 case '6': 148 host = SNICHOST; 149 break; 150 case '?': 151 default: 152 usage(); 153 /* NOTREACHED */ 154 } 155 } 156 argc -= optind; 157 argv += optind; 158 159 if (!argc || (country != NULL && host != NULL)) 160 usage(); 161 162 /* 163 * If no host or country is specified determine the top level domain 164 * from the query. If the TLD is a number, query ARIN. Otherwise, use 165 * TLD.whois-server.net. If the domain does not contain '.', fall 166 * back to NICHOST. 167 */ 168 if (host == NULL && country == NULL) { 169 use_qnichost = 1; 170 host = NICHOST; 171 if (!(flags & WHOIS_QUICK)) 172 flags |= WHOIS_RECURSE; 173 } 174 while (argc-- > 0) { 175 if (country != NULL) { 176 s_asprintf(&qnichost, "%s%s", country, QNICHOST_TAIL); 177 whois(*argv, qnichost, flags); 178 } else if (use_qnichost) 179 if ((qnichost = choose_server(*argv)) != NULL) 180 whois(*argv, qnichost, flags); 181 if (qnichost == NULL) 182 whois(*argv, host, flags); 183 free(qnichost); 184 qnichost = NULL; 185 argv++; 186 } 187 exit(0); 188 } 189 190 /* 191 * This function will remove any trailing periods from domain, after which it 192 * returns a pointer to newly allocated memory containing the whois server to 193 * be queried, or a NULL if the correct server couldn't be determined. The 194 * caller must remember to free(3) the allocated memory. 195 */ 196 static char * 197 choose_server(char *domain) 198 { 199 char *pos, *retval; 200 201 for (pos = strchr(domain, '\0'); pos > domain && *--pos == '.';) 202 *pos = '\0'; 203 if (*domain == '\0') 204 errx(EX_USAGE, "can't search for a null string"); 205 while (pos > domain && *pos != '.') 206 --pos; 207 if (pos <= domain) 208 return (NULL); 209 if (isdigit((unsigned char)*++pos)) 210 s_asprintf(&retval, "%s", ANICHOST); 211 else 212 s_asprintf(&retval, "%s%s", pos, QNICHOST_TAIL); 213 return (retval); 214 } 215 216 static struct addrinfo * 217 gethostinfo(char const *host, int exit_on_error) 218 { 219 struct addrinfo hints, *res; 220 int error; 221 222 memset(&hints, 0, sizeof(hints)); 223 hints.ai_flags = 0; 224 hints.ai_family = AF_UNSPEC; 225 hints.ai_socktype = SOCK_STREAM; 226 error = getaddrinfo(host, port, &hints, &res); 227 if (error) { 228 warnx("%s: %s", host, gai_strerror(error)); 229 if (exit_on_error) 230 exit(EX_NOHOST); 231 return (NULL); 232 } 233 return (res); 234 } 235 236 /* 237 * Wrapper for asprintf(3) that exits on error. 238 */ 239 static void 240 s_asprintf(char **ret, const char *format, ...) 241 { 242 243 va_list ap; 244 245 va_start(ap, format); 246 if (vasprintf(ret, format, ap) == -1) { 247 va_end(ap); 248 err(EX_OSERR, "vasprintf()"); 249 } 250 va_end(ap); 251 } 252 253 static void 254 whois(const char *query, const char *hostname, int flags) 255 { 256 FILE *sfi, *sfo; 257 struct addrinfo *hostres, *res; 258 char *buf, *host, *nhost, *p; 259 int i, s = -1; 260 size_t c, len; 261 262 hostres = gethostinfo(hostname, 1); 263 for (res = hostres; res; res = res->ai_next) { 264 s = socket(res->ai_family, res->ai_socktype, res->ai_protocol); 265 if (s < 0) 266 continue; 267 if (connect(s, res->ai_addr, res->ai_addrlen) == 0) 268 break; 269 close(s); 270 } 271 freeaddrinfo(hostres); 272 if (res == NULL) 273 err(EX_OSERR, "connect()"); 274 275 sfi = fdopen(s, "r"); 276 sfo = fdopen(s, "w"); 277 if (sfi == NULL || sfo == NULL) 278 err(EX_OSERR, "fdopen()"); 279 if (strcmp(hostname, GERMNICHOST) == 0) { 280 fprintf(sfo, "-T dn,ace -C US-ASCII %s\r\n", query); 281 } else { 282 fprintf(sfo, "%s\r\n", query); 283 } 284 fflush(sfo); 285 nhost = NULL; 286 while ((buf = fgetln(sfi, &len)) != NULL) { 287 while (len > 0 && isspace((unsigned char)buf[len - 1])) 288 buf[--len] = '\0'; 289 printf("%.*s\n", (int)len, buf); 290 291 if ((flags & WHOIS_RECURSE) && nhost == NULL) { 292 host = strnstr(buf, WHOIS_SERVER_ID, len); 293 if (host != NULL) { 294 host += sizeof(WHOIS_SERVER_ID) - 1; 295 for (p = host; p < buf + len; p++) { 296 if (!ishost(*p)) { 297 *p = '\0'; 298 break; 299 } 300 } 301 s_asprintf(&nhost, "%.*s", 302 (int)(buf + len - host), host); 303 } else if ((host = 304 strnstr(buf, WHOIS_ORG_SERVER_ID, len)) != NULL) { 305 host += sizeof(WHOIS_ORG_SERVER_ID) - 1; 306 for (p = host; p < buf + len; p++) { 307 if (!ishost(*p)) { 308 *p = '\0'; 309 break; 310 } 311 } 312 s_asprintf(&nhost, "%.*s", 313 (int)(buf + len - host), host); 314 } else if (strcmp(hostname, ANICHOST) == 0) { 315 for (c = 0; c <= len; c++) 316 buf[c] = tolower((int)buf[c]); 317 for (i = 0; ip_whois[i] != NULL; i++) { 318 if (strnstr(buf, ip_whois[i], len) != 319 NULL) { 320 s_asprintf(&nhost, "%s", 321 ip_whois[i]); 322 break; 323 } 324 } 325 } 326 } 327 } 328 if (nhost != NULL) { 329 whois(query, nhost, 0); 330 free(nhost); 331 } 332 } 333 334 static void 335 usage(void) 336 { 337 fprintf(stderr, 338 "usage: whois [-aAbdgilImQrR6] [-c country-code | -h hostname] " 339 "[-p port] name ...\n"); 340 exit(EX_USAGE); 341 } 342