usr.bin/whois/whois.c

   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
  34 #ifndef lint
  35 static const char copyright[] =
  36 "@(#) Copyright (c) 1980, 1993\n\
  37         The Regents of the University of California.  All rights reserved.\n";
  38 #endif /* not lint */
  39
  40 #if 0
  41 #ifndef lint
  42 static char sccsid[] = "@(#)whois.c     8.1 (Berkeley) 6/6/93";
  43 #endif /* not lint */
  44 #endif
  45
  46 #include <sys/cdefs.h>
  47 __FBSDID("$FreeBSD$");
  48
  49 #include <sys/types.h>
  50 #include <sys/socket.h>
  51 #include <netinet/in.h>
  52 #include <arpa/inet.h>
  53 #include <ctype.h>
  54 #include <err.h>
  55 #include <netdb.h>
  56 #include <stdarg.h>
  57 #include <stdio.h>
  58 #include <stdlib.h>
  59 #include <string.h>
  60 #include <sysexits.h>
  61 #include <unistd.h>
  62
  63 #define ABUSEHOST       "whois.abuse.net"
  64 #define NICHOST         "whois.crsnic.net"
  65 #define INICHOST        "whois.networksolutions.com"
  66 #define DNICHOST        "whois.nic.mil"
  67 #define GNICHOST        "whois.nic.gov"
  68 #define ANICHOST        "whois.arin.net"
  69 #define LNICHOST        "whois.lacnic.net"
  70 #define KNICHOST        "whois.krnic.net"
  71 #define RNICHOST        "whois.ripe.net"
  72 #define PNICHOST        "whois.apnic.net"
  73 #define MNICHOST        "whois.ra.net"
  74 #define QNICHOST_TAIL   ".whois-servers.net"
  75 #define SNICHOST        "whois.6bone.net"
  76 #define BNICHOST        "whois.registro.br"
  77 #define NORIDHOST       "whois.norid.no"
  78 #define IANAHOST        "whois.iana.org"
  79 #define GERMNICHOST     "de.whois-servers.net"
  80 #define FNICHOST        "whois.afrinic.net"
  81 #define DEFAULT_PORT    "whois"
  82 #define WHOIS_SERVER_ID "Whois Server: "
  83 #define WHOIS_ORG_SERVER_ID     "Registrant Street1:Whois Server:"
  84
  85 #define WHOIS_RECURSE           0x01
  86 #define WHOIS_QUICK             0x02
  87
  88 #define ishost(h) (isalnum((unsigned char)h) || h == '.' || h == '-')
  89
  90 const char *ip_whois[] = { LNICHOST, RNICHOST, PNICHOST, BNICHOST,
  91                            FNICHOST, NULL };
  92 const char *port = DEFAULT_PORT;
  93
  94 static char *choose_server(char *);
  95 static struct addrinfo *gethostinfo(char const *host, int exit_on_error);
  96 static void s_asprintf(char **ret, const char *format, ...) __printflike(2, 3);
  97 static void usage(void);
  98 static void whois(const char *, const char *, int);
  99
 100 int
 101 main(int argc, char *argv[])
 102 {
 103         const char *country, *host;
 104         char *qnichost;
 105         int ch, flags, use_qnichost;
 106
 107 #ifdef  SOCKS
 108         SOCKSinit(argv[0]);
 109 #endif
 110
 111         country = host = qnichost = NULL;
 112         flags = use_qnichost = 0;
 113         while ((ch = getopt(argc, argv, "aAbc:dfgh:iIklmp:QrR6")) != -1) {
 114                 switch (ch) {
 115                 case 'a':
 116                         host = ANICHOST;
 117                         break;
 118                 case 'A':
 119                         host = PNICHOST;
 120                         break;
 121                 case 'b':
 122                         host = ABUSEHOST;
 123                         break;
 124                 case 'c':
 125                         country = optarg;
 126                         break;
 127                 case 'd':
 128                         host = DNICHOST;
 129                         break;
 130                 case 'f':
 131                         host = FNICHOST;
 132                         break;
 133                 case 'g':
 134                         host = GNICHOST;
 135                         break;
 136                 case 'h':
 137                         host = optarg;
 138                         break;
 139                 case 'i':
 140                         host = INICHOST;
 141                         break;
 142                 case 'I':
 143                         host = IANAHOST;
 144                         break;
 145                 case 'k':
 146                         host = KNICHOST;
 147                         break;
 148                 case 'l':
 149                         host = LNICHOST;
 150                         break;
 151                 case 'm':
 152                         host = MNICHOST;
 153                         break;
 154                 case 'p':
 155                         port = optarg;
 156                         break;
 157                 case 'Q':
 158                         flags |= WHOIS_QUICK;
 159                         break;
 160                 case 'r':
 161                         host = RNICHOST;
 162                         break;
 163                 case 'R':
 164                         warnx("-R is deprecated; use '-c ru' instead");
 165                         country = "ru";
 166                         break;
 167                 case '6':
 168                         host = SNICHOST;
 169                         break;
 170                 case '?':
 171                 default:
 172                         usage();
 173                         /* NOTREACHED */
 174                 }
 175         }
 176         argc -= optind;
 177         argv += optind;
 178
 179         if (!argc || (country != NULL && host != NULL))
 180                 usage();
 181
 182         /*
 183          * If no host or country is specified determine the top level domain
 184          * from the query.  If the TLD is a number, query ARIN.  Otherwise, use
 185          * TLD.whois-server.net.  If the domain does not contain '.', fall
 186          * back to NICHOST.
 187          */
 188         if (host == NULL && country == NULL) {
 189                 use_qnichost = 1;
 190                 host = NICHOST;
 191                 if (!(flags & WHOIS_QUICK))
 192                         flags |= WHOIS_RECURSE;
 193         }
 194         while (argc-- > 0) {
 195                 if (country != NULL) {
 196                         s_asprintf(&qnichost, "%s%s", country, QNICHOST_TAIL);
 197                         whois(*argv, qnichost, flags);
 198                 } else if (use_qnichost)
 199                         if ((qnichost = choose_server(*argv)) != NULL)
 200                                 whois(*argv, qnichost, flags);
 201                 if (qnichost == NULL)
 202                         whois(*argv, host, flags);
 203                 free(qnichost);
 204                 qnichost = NULL;
 205                 argv++;
 206         }
 207         exit(0);
 208 }
 209
 210 /*
 211  * This function will remove any trailing periods from domain, after which it
 212  * returns a pointer to newly allocated memory containing the whois server to
 213  * be queried, or a NULL if the correct server couldn't be determined.  The
 214  * caller must remember to free(3) the allocated memory.
 215  */
 216 static char *
 217 choose_server(char *domain)
 218 {
 219         char *pos, *retval;
 220
 221         for (pos = strchr(domain, '\0'); pos > domain && *--pos == '.';)
 222                 *pos = '\0';
 223         if (*domain == '\0')
 224                 errx(EX_USAGE, "can't search for a null string");
 225         if (strlen(domain) > sizeof("-NORID")-1 &&
 226             strcasecmp(domain + strlen(domain) - sizeof("-NORID") + 1,
 227                 "-NORID") == 0) {
 228                 s_asprintf(&retval, "%s", NORIDHOST);
 229                 return (retval);
 230         }
 231         while (pos > domain && *pos != '.')
 232                 --pos;
 233         if (pos <= domain)
 234                 return (NULL);
 235         if (isdigit((unsigned char)*++pos))
 236                 s_asprintf(&retval, "%s", ANICHOST);
 237         else
 238                 s_asprintf(&retval, "%s%s", pos, QNICHOST_TAIL);
 239         return (retval);
 240 }
 241
 242 static struct addrinfo *
 243 gethostinfo(char const *host, int exit_on_error)
 244 {
 245         struct addrinfo hints, *res;
 246         int error;
 247
 248         memset(&hints, 0, sizeof(hints));
 249         hints.ai_flags = 0;
 250         hints.ai_family = AF_UNSPEC;
 251         hints.ai_socktype = SOCK_STREAM;
 252         error = getaddrinfo(host, port, &hints, &res);
 253         if (error) {
 254                 warnx("%s: %s", host, gai_strerror(error));
 255                 if (exit_on_error)
 256                         exit(EX_NOHOST);
 257                 return (NULL);
 258         }
 259         return (res);
 260 }
 261
 262 /*
 263  * Wrapper for asprintf(3) that exits on error.
 264  */
 265 static void
 266 s_asprintf(char **ret, const char *format, ...)
 267 {
 268         va_list ap;
 269
 270         va_start(ap, format);
 271         if (vasprintf(ret, format, ap) == -1) {
 272                 va_end(ap);
 273                 err(EX_OSERR, "vasprintf()");
 274         }
 275         va_end(ap);
 276 }
 277
 278 static void
 279 whois(const char *query, const char *hostname, int flags)
 280 {
 281         FILE *sfi, *sfo;
 282         struct addrinfo *hostres, *res;
 283         char *buf, *host, *nhost, *p;
 284         int i, s;
 285         size_t c, len;
 286
 287         s = -1;
 288         hostres = gethostinfo(hostname, 1);
 289         for (res = hostres; res; res = res->ai_next) {
 290                 s = socket(res->ai_family, res->ai_socktype, res->ai_protocol);
 291                 if (s < 0)
 292                         continue;
 293                 if (connect(s, res->ai_addr, res->ai_addrlen) == 0)
 294                         break;
 295                 close(s);
 296         }
 297         freeaddrinfo(hostres);
 298         if (res == NULL)
 299                 err(EX_OSERR, "connect()");
 300
 301         sfi = fdopen(s, "r");
 302         sfo = fdopen(s, "w");
 303         if (sfi == NULL || sfo == NULL)
 304                 err(EX_OSERR, "fdopen()");
 305         if (strcmp(hostname, GERMNICHOST) == 0) {
 306                 fprintf(sfo, "-T dn,ace -C US-ASCII %s\r\n", query);
 307         } else if (strcmp(hostname, "dk" QNICHOST_TAIL) == 0) {
 308                 fprintf(sfo, "--show-handles %s\r\n", query);
 309         } else {
 310                 fprintf(sfo, "%s\r\n", query);
 311         }
 312         fflush(sfo);
 313         nhost = NULL;
 314         while ((buf = fgetln(sfi, &len)) != NULL) {
 315                 while (len > 0 && isspace((unsigned char)buf[len - 1]))
 316                         buf[--len] = '\0';
 317                 printf("%.*s\n", (int)len, buf);
 318
 319                 if ((flags & WHOIS_RECURSE) && nhost == NULL) {
 320                         host = strnstr(buf, WHOIS_SERVER_ID, len);
 321                         if (host != NULL) {
 322                                 host += sizeof(WHOIS_SERVER_ID) - 1;
 323                                 for (p = host; p < buf + len; p++) {
 324                                         if (!ishost(*p)) {
 325                                                 *p = '\0';
 326                                                 break;
 327                                         }
 328                                 }
 329                                 s_asprintf(&nhost, "%.*s",
 330                                      (int)(buf + len - host), host);
 331                         } else if ((host =
 332                             strnstr(buf, WHOIS_ORG_SERVER_ID, len)) != NULL) {
 333                                 host += sizeof(WHOIS_ORG_SERVER_ID) - 1;
 334                                 for (p = host; p < buf + len; p++) {
 335                                         if (!ishost(*p)) {
 336                                                 *p = '\0';
 337                                                 break;
 338                                         }
 339                                 }
 340                                 s_asprintf(&nhost, "%.*s",
 341                                     (int)(buf + len - host), host);
 342                         } else if (strcmp(hostname, ANICHOST) == 0) {
 343                                 for (c = 0; c <= len; c++)
 344                                         buf[c] = tolower((unsigned char)buf[c]);
 345                                 for (i = 0; ip_whois[i] != NULL; i++) {
 346                                         if (strnstr(buf, ip_whois[i], len) !=
 347                                             NULL) {
 348                                                 s_asprintf(&nhost, "%s",
 349                                                     ip_whois[i]);
 350                                                 break;
 351                                         }
 352                                 }
 353                         }
 354                 }
 355         }
 356         if (nhost != NULL) {
 357                 whois(query, nhost, 0);
 358                 free(nhost);
 359         }
 360 }
 361
 362 static void
 363 usage(void)
 364 {
 365         fprintf(stderr,
 366             "usage: whois [-aAbdfgiIklmQrR6] [-c country-code | -h hostname] "
 367             "[-p port] name ...\n");
 368         exit(EX_USAGE);
 369 }