usr.bin/whois/whois.c

   1 /*      $NetBSD: whois.c,v 1.33 2008/07/21 14:19:28 lukem Exp $   */
   2 /*      $OpenBSD: whois.c,v 1.28 2003/09/18 22:16:15 fgsch Exp $        */
   3
   4 /*
   5  * Copyright (c) 1980, 1993
   6  *      The Regents of the University of California.  All rights reserved.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  11  * 1. Redistributions of source code must retain the above copyright
  12  *    notice, this list of conditions and the following disclaimer.
  13  * 2. Redistributions in binary form must reproduce the above copyright
  14  *    notice, this list of conditions and the following disclaimer in the
  15  *    documentation and/or other materials provided with the distribution.
  16  * 3. Neither the name of the University nor the names of its contributors
  17  *    may be used to endorse or promote products derived from this software
  18  *    without specific prior written permission.
  19  *
  20  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  21  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  22  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  23  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  24  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  25  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  26  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  27  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  28  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  29  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  30  * SUCH DAMAGE.
  31  */
  32
  33 #include <sys/cdefs.h>
  34
  35 #ifndef lint
  36 __COPYRIGHT("@(#) Copyright (c) 1980, 1993\
  37  The Regents of the University of California.  All rights reserved.");
  38 #endif /* not lint */
  39
  40 #ifndef lint
  41 #if 0
  42 static const char sccsid[] = "@(#)whois.c       8.1 (Berkeley) 6/6/93";
  43 #else
  44 __RCSID("$NetBSD: whois.c,v 1.33 2008/07/21 14:19:28 lukem Exp $");
  45 #endif
  46 #endif /* not lint */
  47
  48 #include <sys/types.h>
  49 #include <sys/socket.h>
  50
  51 #include <netinet/in.h>
  52 #include <arpa/inet.h>
  53 #include <netdb.h>
  54
  55 #include <ctype.h>
  56 #include <err.h>
  57 #include <stdio.h>
  58 #include <stdlib.h>
  59 #include <string.h>
  60 #include <unistd.h>
  61 #include <errno.h>
  62
  63 #define ANICHOST        "whois.arin.net"
  64 #define BNICHOST        "whois.registro.br"
  65 #define CNICHOST        "whois.corenic.net"
  66 #define DNICHOST        "whois.nic.mil"
  67 #define FNICHOST        "whois.afrinic.net"
  68 #define GNICHOST        "whois.nic.gov"
  69 #define INICHOST        "whois.networksolutions.com"
  70 #define LNICHOST        "whois.lacnic.net"
  71 #define MNICHOST        "whois.ra.net"
  72 #define NICHOST         "whois.crsnic.net"
  73 #define PNICHOST        "whois.apnic.net"
  74 #define QNICHOST_TAIL   ".whois-servers.net"
  75 #define RNICHOST        "whois.ripe.net"
  76 #define RUNICHOST       "whois.ripn.net"
  77 #define SNICHOST        "whois.6bone.net"
  78
  79 #define WHOIS_PORT      "whois"
  80 #define WHOIS_SERVER_ID "Whois Server:"
  81
  82 #define WHOIS_RECURSE           0x01
  83 #define WHOIS_QUICK             0x02
  84
  85 static const char *port_whois = WHOIS_PORT;
  86 static const char *ip_whois[] =
  87     { LNICHOST, RNICHOST, PNICHOST, FNICHOST, BNICHOST, NULL };
  88
  89 static void usage(void) __dead;
  90 static int whois(const char *, const char *, const char *, int);
  91 static const char *choose_server(const char *, const char *);
  92
  93 int
  94 main(int argc, char *argv[])
  95 {
  96         int ch, flags, rval;
  97         const char *host, *name, *country;
  98
  99 #ifdef SOCKS
 100         SOCKSinit(argv[0]);
 101 #endif
 102         country = host = NULL;
 103         flags = rval = 0;
 104         while ((ch = getopt(argc, argv, "6Aac:dfgh:ilmp:qQRr")) != -1)
 105                 switch(ch) {
 106                 case 'a':
 107                         host = ANICHOST;
 108                         break;
 109                 case 'A':
 110                         host = PNICHOST;
 111                         break;
 112                 case 'c':
 113                         country = optarg;
 114                         break;
 115                 case 'd':
 116                         host = DNICHOST;
 117                         break;
 118                 case 'f':
 119                         host = FNICHOST;
 120                         break;
 121                 case 'g':
 122                         host = GNICHOST;
 123                         break;
 124                 case 'h':
 125                         host = optarg;
 126                         break;
 127                 case 'i':
 128                         host = INICHOST;
 129                         break;
 130                 case 'l':
 131                         host = LNICHOST;
 132                         break;
 133                 case 'm':
 134                         host = MNICHOST;
 135                         break;
 136                 case 'p':
 137                         port_whois = optarg;
 138                         break;
 139                 case 'q':
 140                         /* deprecated, now the default */
 141                         break;
 142                 case 'Q':
 143                         flags |= WHOIS_QUICK;
 144                         break;
 145                 case 'r':
 146                         host = RNICHOST;
 147                         break;
 148                 case 'R':
 149                         host = RUNICHOST;
 150                         break;
 151                 case '6':
 152                         host = SNICHOST;
 153                         break;
 154                 default:
 155                         usage();
 156                 }
 157         argc -= optind;
 158         argv += optind;
 159
 160         if (!argc || (country != NULL && host != NULL))
 161                 usage();
 162
 163         if (host == NULL && country == NULL && !(flags & WHOIS_QUICK))
 164                 flags |= WHOIS_RECURSE;
 165         for (name = *argv; (name = *argv) != NULL; argv++)
 166                 rval += whois(name, host ? host : choose_server(name, country),
 167                     port_whois, flags);
 168         return rval;
 169 }
 170
 171 static int
 172 whois(const char *query, const char *server, const char *port, int flags)
 173 {
 174         FILE *sfi, *sfo;
 175         char *buf, *p, *nhost, *nbuf = NULL;
 176         size_t len;
 177         int i, s, error;
 178         const char *reason = NULL, *fmt;
 179         struct addrinfo hints, *res, *ai;
 180
 181         (void)memset(&hints, 0, sizeof(hints));
 182         hints.ai_flags = 0;
 183         hints.ai_family = AF_UNSPEC;
 184         hints.ai_socktype = SOCK_STREAM;
 185         error = getaddrinfo(server, port, &hints, &res);
 186         if (error) {
 187                 warnx("%s: %s", server, gai_strerror(error));
 188                 return (1);
 189         }
 190
 191         for (s = -1, ai = res; ai != NULL; ai = ai->ai_next) {
 192                 s = socket(ai->ai_family, ai->ai_socktype, ai->ai_protocol);
 193                 if (s < 0) {
 194                         error = errno;
 195                         reason = "socket";
 196                         continue;
 197                 }
 198                 if (connect(s, ai->ai_addr, ai->ai_addrlen) < 0) {
 199                         error = errno;
 200                         reason = "connect";
 201                         close(s);
 202                         s = -1;
 203                         continue;
 204                 }
 205                 break;  /*okay*/
 206         }
 207         if (s < 0) {
 208                 if (reason) {
 209                         errno = error;
 210                         warn("%s: %s", server, reason);
 211                 } else
 212                         warnx("Unknown error in connection attempt");
 213                 freeaddrinfo(res);
 214                 return (1);
 215         }
 216
 217         if (strcmp(server, "whois.denic.de") == 0 ||
 218             strcmp(server, "de.whois-servers.net") == 0)
 219                 fmt = "-T dn,ace -C ISO-8859-1 %s\r\n";
 220         else
 221                 fmt = "%s\r\n";
 222
 223         sfi = fdopen(s, "r");
 224         sfo = fdopen(s, "w");
 225         if (sfi == NULL || sfo == NULL)
 226                 err(1, "fdopen");
 227         (void)fprintf(sfo, fmt, query);
 228         (void)fflush(sfo);
 229         nhost = NULL;
 230         while ((buf = fgetln(sfi, &len)) != NULL) {
 231                 p = buf + len - 1;
 232                 if (isspace((unsigned char)*p)) {
 233                         do
 234                                 *p = '\0';
 235                         while (p > buf && isspace((unsigned char)*--p));
 236                 } else {
 237                         if ((nbuf = malloc(len + 1)) == NULL)
 238                                 err(1, "malloc");
 239                         (void)memcpy(nbuf, buf, len);
 240                         nbuf[len] = '\0';
 241                         buf = nbuf;
 242                 }
 243                 (void)puts(buf);
 244
 245                 if (nhost != NULL || !(flags & WHOIS_RECURSE))
 246                         continue;
 247
 248                 if ((p = strstr(buf, WHOIS_SERVER_ID))) {
 249                         p += sizeof(WHOIS_SERVER_ID) - 1;
 250                         while (isblank((unsigned char)*p))
 251                                 p++;
 252                         if ((len = strcspn(p, " \t\n\r"))) {
 253                                 if ((nhost = malloc(len + 1)) == NULL)
 254                                         err(1, "malloc");
 255                                 (void)memcpy(nhost, p, len);
 256                                 nhost[len] = '\0';
 257                         }
 258                 } else if (strcmp(server, ANICHOST) == 0) {
 259                         for (p = buf; *p != '\0'; p++)
 260                                 *p = tolower((unsigned char)*p);
 261                         for (i = 0; ip_whois[i] != NULL; i++) {
 262                                 if (strstr(buf, ip_whois[i]) != NULL) {
 263                                         nhost = strdup(ip_whois[i]);
 264                                         if (nhost == NULL)
 265                                                 err(1, "strdup");
 266                                         break;
 267                                 }
 268                         }
 269                 }
 270         }
 271         if (nbuf != NULL)
 272                 free(nbuf);
 273
 274         if (nhost != NULL) {
 275                 error = whois(query, nhost, port, 0);
 276                 free(nhost);
 277         }
 278         freeaddrinfo(res);
 279         (void)fclose(sfi);
 280         (void)fclose(sfo);
 281         return (error);
 282 }
 283
 284 /*
 285  * If no country is specified determine the top level domain from the query.
 286  * If the TLD is a number, query ARIN, otherwise, use TLD.whois-server.net.
 287  * If the domain does not contain '.', check to see if it is an NSI handle
 288  * (starts with '!') or a CORE handle (COCO-[0-9]+ or COHO-[0-9]+).
 289  * Fall back to NICHOST for the non-handle case.
 290  */
 291 static const char *
 292 choose_server(const char *name, const char *country)
 293 {
 294         static char *server;
 295         char *nserver;
 296         const char *qhead;
 297         char *ep;
 298         size_t len;
 299
 300         if (country != NULL)
 301                 qhead = country;
 302         else if ((qhead = strrchr(name, '.')) == NULL) {
 303                 if (*name == '!')
 304                         return (INICHOST);
 305                 else if ((strncasecmp(name, "COCO-", 5) == 0 ||
 306                     strncasecmp(name, "COHO-", 5) == 0) &&
 307                     strtol(name + 5, &ep, 10) > 0 && *ep == '\0')
 308                         return (CNICHOST);
 309                 else
 310                         return (NICHOST);
 311         } else if (isdigit((unsigned char)*(++qhead)))
 312                 return (ANICHOST);
 313         len = strlen(qhead) + sizeof(QNICHOST_TAIL);
 314         if ((nserver = realloc(server, len)) == NULL)
 315                 err(1, "realloc");
 316         server = nserver;
 317         (void)strlcpy(server, qhead, len);
 318         (void)strlcat(server, QNICHOST_TAIL, len);
 319         return (server);
 320 }
 321
 322 static void
 323 usage(void)
 324 {
 325         (void)fprintf(stderr,
 326             "usage: %s [-6AadgilmQRr] [-c country-code | -h hostname] "
 327                 "[-p port] name ...\n", getprogname());
 328         exit(1);
 329 }