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 * 4. 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 30 #ifndef lint 31 static const char copyright[] = 32 "@(#) Copyright (c) 1980, 1993\n\ 33 The Regents of the University of California. All rights reserved.\n"; 34 #endif /* not lint */ 35 36 #if 0 37 #ifndef lint 38 static char sccsid[] = "@(#)whois.c 8.1 (Berkeley) 6/6/93"; 39 #endif /* not lint */ 40 #endif 41 42 #include <sys/cdefs.h> 43 __FBSDID("$FreeBSD$"); 44 45 #include <sys/types.h> 46 #include <sys/socket.h> 47 #include <sys/poll.h> 48 #include <netinet/in.h> 49 #include <arpa/inet.h> 50 #include <ctype.h> 51 #include <err.h> 52 #include <netdb.h> 53 #include <stdarg.h> 54 #include <stdio.h> 55 #include <stdlib.h> 56 #include <string.h> 57 #include <sysexits.h> 58 #include <unistd.h> 59 #include <fcntl.h> 60 #include <errno.h> 61 62 #define ABUSEHOST "whois.abuse.net" 63 #define ANICHOST "whois.arin.net" 64 #define DENICHOST "whois.denic.de" 65 #define DKNICHOST "whois.dk-hostmaster.dk" 66 #define FNICHOST "whois.afrinic.net" 67 #define GNICHOST "whois.nic.gov" 68 #define IANAHOST "whois.iana.org" 69 #define INICHOST "whois.internic.net" 70 #define KNICHOST "whois.krnic.net" 71 #define LNICHOST "whois.lacnic.net" 72 #define MNICHOST "whois.ra.net" 73 #define PDBHOST "whois.peeringdb.com" 74 #define PNICHOST "whois.apnic.net" 75 #define QNICHOST_TAIL ".whois-servers.net" 76 #define RNICHOST "whois.ripe.net" 77 #define VNICHOST "whois.verisign-grs.com" 78 79 #define DEFAULT_PORT "whois" 80 81 #define WHOIS_RECURSE 0x01 82 #define WHOIS_QUICK 0x02 83 #define WHOIS_SPAM_ME 0x04 84 85 #define CHOPSPAM ">>> Last update of WHOIS database:" 86 87 #define ishost(h) (isalnum((unsigned char)h) || h == '.' || h == '-') 88 89 #define SCAN(p, end, check) \ 90 while ((p) < (end)) \ 91 if (check) ++(p); \ 92 else break 93 94 static struct { 95 const char *suffix, *server; 96 } whoiswhere[] = { 97 /* Various handles */ 98 { "-ARIN", ANICHOST }, 99 { "-NICAT", "at" QNICHOST_TAIL }, 100 { "-NORID", "no" QNICHOST_TAIL }, 101 { "-RIPE", RNICHOST }, 102 /* Nominet's whois server doesn't return referrals to JANET */ 103 { ".ac.uk", "ac.uk" QNICHOST_TAIL }, 104 { "", IANAHOST }, /* default */ 105 { NULL, NULL } /* safety belt */ 106 }; 107 108 #define WHOIS_REFERRAL(s) { s, sizeof(s) - 1 } 109 static struct { 110 const char *prefix; 111 size_t len; 112 } whois_referral[] = { 113 WHOIS_REFERRAL("whois:"), /* IANA */ 114 WHOIS_REFERRAL("Whois Server:"), 115 WHOIS_REFERRAL("Registrar WHOIS Server:"), /* corporatedomains.com */ 116 WHOIS_REFERRAL("ReferralServer: whois://"), /* ARIN */ 117 WHOIS_REFERRAL("descr: region. Please query"), /* AfriNIC */ 118 { NULL, 0 } 119 }; 120 121 static const char *actually_arin[] = { 122 "netname: ERX-NETBLOCK\n", /* APNIC */ 123 "netname: NON-RIPE-NCC-MANAGED-ADDRESS-BLOCK\n", 124 NULL 125 }; 126 127 static const char *port = DEFAULT_PORT; 128 129 static const char *choose_server(char *); 130 static struct addrinfo *gethostinfo(char const *host, int exitnoname); 131 static void s_asprintf(char **ret, const char *format, ...) __printflike(2, 3); 132 static void usage(void); 133 static void whois(const char *, const char *, int); 134 135 int 136 main(int argc, char *argv[]) 137 { 138 const char *country, *host; 139 int ch, flags; 140 141 #ifdef SOCKS 142 SOCKSinit(argv[0]); 143 #endif 144 145 country = host = NULL; 146 flags = 0; 147 while ((ch = getopt(argc, argv, "aAbc:fgh:iIklmp:PQrRS")) != -1) { 148 switch (ch) { 149 case 'a': 150 host = ANICHOST; 151 break; 152 case 'A': 153 host = PNICHOST; 154 break; 155 case 'b': 156 host = ABUSEHOST; 157 break; 158 case 'c': 159 country = optarg; 160 break; 161 case 'f': 162 host = FNICHOST; 163 break; 164 case 'g': 165 host = GNICHOST; 166 break; 167 case 'h': 168 host = optarg; 169 break; 170 case 'i': 171 host = INICHOST; 172 break; 173 case 'I': 174 host = IANAHOST; 175 break; 176 case 'k': 177 host = KNICHOST; 178 break; 179 case 'l': 180 host = LNICHOST; 181 break; 182 case 'm': 183 host = MNICHOST; 184 break; 185 case 'p': 186 port = optarg; 187 break; 188 case 'P': 189 host = PDBHOST; 190 break; 191 case 'Q': 192 flags |= WHOIS_QUICK; 193 break; 194 case 'r': 195 host = RNICHOST; 196 break; 197 case 'R': 198 flags |= WHOIS_RECURSE; 199 break; 200 case 'S': 201 flags |= WHOIS_SPAM_ME; 202 break; 203 case '?': 204 default: 205 usage(); 206 /* NOTREACHED */ 207 } 208 } 209 argc -= optind; 210 argv += optind; 211 212 if (!argc || (country != NULL && host != NULL)) 213 usage(); 214 215 /* 216 * If no host or country is specified, rely on referrals from IANA. 217 */ 218 if (host == NULL && country == NULL) { 219 if ((host = getenv("WHOIS_SERVER")) == NULL && 220 (host = getenv("RA_SERVER")) == NULL) { 221 if (!(flags & WHOIS_QUICK)) 222 flags |= WHOIS_RECURSE; 223 } 224 } 225 while (argc-- > 0) { 226 if (country != NULL) { 227 char *qnichost; 228 s_asprintf(&qnichost, "%s%s", country, QNICHOST_TAIL); 229 whois(*argv, qnichost, flags); 230 free(qnichost); 231 } else 232 whois(*argv, host != NULL ? host : 233 choose_server(*argv), flags); 234 argv++; 235 } 236 exit(0); 237 } 238 239 static const char * 240 choose_server(char *domain) 241 { 242 size_t len = strlen(domain); 243 int i; 244 245 for (i = 0; whoiswhere[i].suffix != NULL; i++) { 246 size_t suffix_len = strlen(whoiswhere[i].suffix); 247 if (len > suffix_len && 248 strcasecmp(domain + len - suffix_len, 249 whoiswhere[i].suffix) == 0) 250 return (whoiswhere[i].server); 251 } 252 errx(EX_SOFTWARE, "no default whois server"); 253 } 254 255 static struct addrinfo * 256 gethostinfo(char const *host, int exit_on_noname) 257 { 258 struct addrinfo hints, *res; 259 int error; 260 261 memset(&hints, 0, sizeof(hints)); 262 hints.ai_flags = AI_CANONNAME; 263 hints.ai_family = AF_UNSPEC; 264 hints.ai_socktype = SOCK_STREAM; 265 res = NULL; 266 error = getaddrinfo(host, port, &hints, &res); 267 if (error && (exit_on_noname || error != EAI_NONAME)) 268 err(EX_NOHOST, "%s: %s", host, gai_strerror(error)); 269 return (res); 270 } 271 272 /* 273 * Wrapper for asprintf(3) that exits on error. 274 */ 275 static void 276 s_asprintf(char **ret, const char *format, ...) 277 { 278 va_list ap; 279 280 va_start(ap, format); 281 if (vasprintf(ret, format, ap) == -1) { 282 va_end(ap); 283 err(EX_OSERR, "vasprintf()"); 284 } 285 va_end(ap); 286 } 287 288 static int 289 connect_to_any_host(struct addrinfo *hostres) 290 { 291 struct addrinfo *res; 292 nfds_t i, j; 293 size_t count; 294 struct pollfd *fds; 295 int timeout = 180, s = -1; 296 297 for (res = hostres, count = 0; res; res = res->ai_next) 298 count++; 299 fds = calloc(count, sizeof(*fds)); 300 if (fds == NULL) 301 err(EX_OSERR, "calloc()"); 302 303 /* 304 * Traverse the result list elements and make non-block 305 * connection attempts. 306 */ 307 count = i = 0; 308 for (res = hostres; res != NULL; res = res->ai_next) { 309 s = socket(res->ai_family, res->ai_socktype | SOCK_NONBLOCK, 310 res->ai_protocol); 311 if (s < 0) 312 continue; 313 if (connect(s, res->ai_addr, res->ai_addrlen) < 0) { 314 if (errno == EINPROGRESS) { 315 /* Add the socket to poll list */ 316 fds[i].fd = s; 317 fds[i].events = POLLERR | POLLHUP | 318 POLLIN | POLLOUT; 319 /* 320 * From here until a socket connects, the 321 * socket fd is owned by the fds[] poll array. 322 */ 323 s = -1; 324 count++; 325 i++; 326 } else { 327 close(s); 328 s = -1; 329 330 /* 331 * Poll only if we have something to poll, 332 * otherwise just go ahead and try next 333 * address 334 */ 335 if (count == 0) 336 continue; 337 } 338 } else 339 goto done; 340 341 /* 342 * If we are at the last address, poll until a connection is 343 * established or we failed all connection attempts. 344 */ 345 if (res->ai_next == NULL) 346 timeout = INFTIM; 347 348 /* 349 * Poll the watched descriptors for successful connections: 350 * if we still have more untried resolved addresses, poll only 351 * once; otherwise, poll until all descriptors have errors, 352 * which will be considered as ETIMEDOUT later. 353 */ 354 do { 355 int n; 356 357 n = poll(fds, i, timeout); 358 if (n == 0) { 359 /* 360 * No event reported in time. Try with a 361 * smaller timeout (but cap at 2-3ms) 362 * after a new host have been added. 363 */ 364 if (timeout >= 3) 365 timeout >>= 1; 366 367 break; 368 } else if (n < 0) { 369 /* 370 * errno here can only be EINTR which we would 371 * want to clean up and bail out. 372 */ 373 s = -1; 374 goto done; 375 } 376 377 /* 378 * Check for the event(s) we have seen. 379 */ 380 for (j = 0; j < i; j++) { 381 if (fds[j].fd == -1 || fds[j].events == 0 || 382 fds[j].revents == 0) 383 continue; 384 if (fds[j].revents & ~(POLLIN | POLLOUT)) { 385 close(fds[j].fd); 386 fds[j].fd = -1; 387 fds[j].events = 0; 388 count--; 389 continue; 390 } else if (fds[j].revents & (POLLIN | POLLOUT)) { 391 /* Connect succeeded. */ 392 s = fds[j].fd; 393 fds[j].fd = -1; 394 395 goto done; 396 } 397 398 } 399 } while (timeout == INFTIM && count != 0); 400 } 401 402 /* All attempts were failed */ 403 s = -1; 404 if (count == 0) 405 errno = ETIMEDOUT; 406 407 done: 408 /* Close all watched fds except the succeeded one */ 409 for (j = 0; j < i; j++) 410 if (fds[j].fd != -1) 411 close(fds[j].fd); 412 free(fds); 413 return (s); 414 } 415 416 static void 417 whois(const char *query, const char *hostname, int flags) 418 { 419 FILE *fp; 420 struct addrinfo *hostres; 421 char *buf, *host, *nhost, *p; 422 int s, f; 423 size_t len, i; 424 425 hostres = gethostinfo(hostname, 1); 426 s = connect_to_any_host(hostres); 427 if (s == -1) 428 err(EX_OSERR, "connect()"); 429 430 /* Restore default blocking behavior. */ 431 if ((f = fcntl(s, F_GETFL)) == -1) 432 err(EX_OSERR, "fcntl()"); 433 f &= ~O_NONBLOCK; 434 if (fcntl(s, F_SETFL, f) == -1) 435 err(EX_OSERR, "fcntl()"); 436 437 fp = fdopen(s, "r+"); 438 if (fp == NULL) 439 err(EX_OSERR, "fdopen()"); 440 441 if (!(flags & WHOIS_SPAM_ME) && 442 (strcasecmp(hostname, DENICHOST) == 0 || 443 strcasecmp(hostname, "de" QNICHOST_TAIL) == 0)) { 444 const char *q; 445 int idn = 0; 446 for (q = query; *q != '\0'; q++) 447 if (!isascii(*q)) 448 idn = 1; 449 fprintf(fp, "-T dn%s %s\r\n", idn ? "" : ",ace", query); 450 } else if (!(flags & WHOIS_SPAM_ME) && 451 (strcasecmp(hostname, DKNICHOST) == 0 || 452 strcasecmp(hostname, "dk" QNICHOST_TAIL) == 0)) 453 fprintf(fp, "--show-handles %s\r\n", query); 454 else if ((flags & WHOIS_SPAM_ME) || 455 strchr(query, ' ') != NULL) 456 fprintf(fp, "%s\r\n", query); 457 else if (strcasecmp(hostname, ANICHOST) == 0) { 458 if (strncasecmp(query, "AS", 2) == 0 && 459 strspn(query+2, "0123456789") == strlen(query+2)) 460 fprintf(fp, "+ a %s\r\n", query+2); 461 else 462 fprintf(fp, "+ %s\r\n", query); 463 } else if (strcasecmp(hostres->ai_canonname, VNICHOST) == 0) 464 fprintf(fp, "domain %s\r\n", query); 465 else 466 fprintf(fp, "%s\r\n", query); 467 fflush(fp); 468 469 nhost = NULL; 470 while ((buf = fgetln(fp, &len)) != NULL) { 471 /* Nominet */ 472 if (!(flags & WHOIS_SPAM_ME) && 473 len == 5 && strncmp(buf, "-- \r\n", 5) == 0) 474 break; 475 476 printf("%.*s", (int)len, buf); 477 478 if ((flags & WHOIS_RECURSE) && nhost == NULL) { 479 for (i = 0; whois_referral[i].prefix != NULL; i++) { 480 p = buf; 481 SCAN(p, buf+len, *p == ' '); 482 if (strncasecmp(p, whois_referral[i].prefix, 483 whois_referral[i].len) != 0) 484 continue; 485 p += whois_referral[i].len; 486 SCAN(p, buf+len, *p == ' '); 487 host = p; 488 SCAN(p, buf+len, ishost(*p)); 489 /* avoid loops */ 490 if (strncmp(hostname, host, p - host) != 0) 491 s_asprintf(&nhost, "%.*s", 492 (int)(p - host), host); 493 break; 494 } 495 for (i = 0; actually_arin[i] != NULL; i++) { 496 if (strncmp(buf, actually_arin[i], len) == 0) { 497 s_asprintf(&nhost, "%s", ANICHOST); 498 break; 499 } 500 } 501 } 502 /* Verisign etc. */ 503 if (!(flags & WHOIS_SPAM_ME) && 504 len >= sizeof(CHOPSPAM)-1 && 505 (strncasecmp(buf, CHOPSPAM, sizeof(CHOPSPAM)-1) == 0 || 506 strncasecmp(buf, CHOPSPAM+4, sizeof(CHOPSPAM)-5) == 0)) { 507 printf("\n"); 508 break; 509 } 510 } 511 fclose(fp); 512 freeaddrinfo(hostres); 513 if (nhost != NULL) { 514 whois(query, nhost, flags); 515 free(nhost); 516 } 517 } 518 519 static void 520 usage(void) 521 { 522 fprintf(stderr, 523 "usage: whois [-aAbfgiIklmPQrRS] [-c country-code | -h hostname] " 524 "[-p port] name ...\n"); 525 exit(EX_USAGE); 526 } 527