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 #ifndef lint 41 #if 0 42 static char sccsid[] = "@(#)whois.c 8.1 (Berkeley) 6/6/93"; 43 #endif 44 static const char rcsid[] = 45 "$FreeBSD$"; 46 #endif /* not lint */ 47 48 #include <sys/types.h> 49 #include <sys/socket.h> 50 #include <netinet/in.h> 51 #include <arpa/inet.h> 52 #include <ctype.h> 53 #include <err.h> 54 #include <netdb.h> 55 #include <stdarg.h> 56 #include <stdio.h> 57 #include <stdlib.h> 58 #include <string.h> 59 #include <sysexits.h> 60 #include <unistd.h> 61 62 #define NICHOST "whois.crsnic.net" 63 #define INICHOST "whois.networksolutions.com" 64 #define DNICHOST "whois.nic.mil" 65 #define GNICHOST "whois.nic.gov" 66 #define ANICHOST "whois.arin.net" 67 #define RNICHOST "whois.ripe.net" 68 #define PNICHOST "whois.apnic.net" 69 #define MNICHOST "whois.ra.net" 70 #define QNICHOST_TAIL ".whois-servers.net" 71 #define SNICHOST "whois.6bone.net" 72 #define DEFAULT_PORT "whois" 73 #define WHOIS_SERVER_ID "Whois Server: " 74 #define NO_MATCH_ID "No match for \"" 75 76 #define WHOIS_RECURSE 0x01 77 #define WHOIS_INIC_FALLBACK 0x02 78 #define WHOIS_QUICK 0x04 79 80 const char *ip_whois[] = { RNICHOST, PNICHOST, NULL }; 81 const char *port = DEFAULT_PORT; 82 83 static char *choose_server(char *); 84 static struct addrinfo *gethostinfo(char const *host, int exit_on_error); 85 static void s_asprintf(char **ret, const char *format, ...); 86 static void usage(void); 87 static void whois(char *, struct addrinfo *, int); 88 89 int 90 main(int argc, char *argv[]) 91 { 92 struct addrinfo *res; 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, "aAc:dgh:imp:QrR6")) != -1) { 104 switch (ch) { 105 case 'a': 106 host = ANICHOST; 107 break; 108 case 'A': 109 host = PNICHOST; 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 'm': 127 host = MNICHOST; 128 break; 129 case 'p': 130 port = optarg; 131 break; 132 case 'Q': 133 flags |= WHOIS_QUICK; 134 break; 135 case 'r': 136 host = RNICHOST; 137 break; 138 case 'R': 139 warnx("-R is deprecated; use '-c ru' instead"); 140 country = "ru"; 141 break; 142 case '6': 143 host = SNICHOST; 144 break; 145 case '?': 146 default: 147 usage(); 148 /* NOTREACHED */ 149 } 150 } 151 argc -= optind; 152 argv += optind; 153 154 if (!argc || (country != NULL && host != NULL)) 155 usage(); 156 157 /* 158 * If no host or country is specified determine the top level domain 159 * from the query. If the TLD is a number, query ARIN. Otherwise, use 160 * TLD.whois-server.net. If the domain does not contain '.', fall 161 * back to NICHOST. 162 */ 163 if (host == NULL && country == NULL) { 164 use_qnichost = 1; 165 host = NICHOST; 166 if (!(flags & WHOIS_QUICK)) 167 flags |= WHOIS_INIC_FALLBACK | WHOIS_RECURSE; 168 } 169 while (argc--) { 170 if (country != NULL) { 171 s_asprintf(&qnichost, "%s%s", country, QNICHOST_TAIL); 172 res = gethostinfo(qnichost, 1); 173 } else if (use_qnichost) 174 if ((qnichost = choose_server(*argv)) != NULL) 175 res = gethostinfo(qnichost, 1); 176 if (qnichost == NULL) 177 res = gethostinfo(host, 1); 178 179 free(qnichost); 180 qnichost = NULL; 181 whois(*argv++, res, flags); 182 freeaddrinfo(res); 183 } 184 exit(0); 185 } 186 187 /* 188 * This function will remove any trailing periods from domain, after which it 189 * returns a pointer to newly allocated memory containing the whois server to 190 * be queried, or a NULL if the correct server couldn't be determined. The 191 * caller must remember to free(3) the allocated memory. 192 */ 193 static char * 194 choose_server(char *domain) 195 { 196 char *pos, *retval; 197 198 for (pos = strchr(domain, '\0'); pos > domain && *--pos == '.';) 199 *pos = '\0'; 200 if (*domain == '\0') 201 errx(EX_USAGE, "can't search for a null string"); 202 while (pos > domain && *pos != '.') 203 --pos; 204 if (pos <= domain) 205 return (NULL); 206 if (isdigit((unsigned char)*++pos)) 207 s_asprintf(&retval, "%s", ANICHOST); 208 else 209 s_asprintf(&retval, "%s%s", pos, QNICHOST_TAIL); 210 return (retval); 211 } 212 213 static struct addrinfo * 214 gethostinfo(char const *host, int exit_on_error) 215 { 216 struct addrinfo hints, *res; 217 int error; 218 219 memset(&hints, 0, sizeof(hints)); 220 hints.ai_flags = 0; 221 hints.ai_family = AF_UNSPEC; 222 hints.ai_socktype = SOCK_STREAM; 223 error = getaddrinfo(host, port, &hints, &res); 224 if (error) { 225 warnx("%s: %s", host, gai_strerror(error)); 226 if (exit_on_error) 227 exit(EX_NOHOST); 228 return (NULL); 229 } 230 return (res); 231 } 232 233 /* 234 * Wrapper for asprintf(3) that exits on error. 235 */ 236 static void 237 s_asprintf(char **ret, const char *format, ...) 238 { 239 va_list ap; 240 241 va_start(ap, format); 242 if (vasprintf(ret, format, ap) == -1) { 243 va_end(ap); 244 err(EX_OSERR, "vasprintf()"); 245 } 246 va_end(ap); 247 } 248 249 static void 250 whois(char *name, struct addrinfo *res, int flags) 251 { 252 FILE *sfi, *sfo; 253 struct addrinfo *res2; 254 char *buf, *nhost, *p; 255 int i, nomatch, s; 256 size_t len; 257 258 for (; res; res = res->ai_next) { 259 s = socket(res->ai_family, res->ai_socktype, res->ai_protocol); 260 if (s < 0) 261 continue; 262 if (connect(s, res->ai_addr, res->ai_addrlen) == 0) 263 break; 264 close(s); 265 } 266 if (res == NULL) 267 err(EX_OSERR, "connect()"); 268 269 sfi = fdopen(s, "r"); 270 sfo = fdopen(s, "w"); 271 if (sfi == NULL || sfo == NULL) 272 err(EX_OSERR, "fdopen()"); 273 fprintf(sfo, "%s\r\n", name); 274 fflush(sfo); 275 nhost = NULL; 276 nomatch = 0; 277 while ((buf = fgetln(sfi, &len)) != NULL) { 278 while (len && isspace(buf[len - 1])) 279 buf[--len] = '\0'; 280 281 if ((flags & WHOIS_RECURSE) && nhost == NULL) { 282 p = strstr(buf, WHOIS_SERVER_ID); 283 if (p != NULL) { 284 p += sizeof(WHOIS_SERVER_ID) - 1; 285 if ((len = strcspn(p, " \t\n\r")) != 0) { 286 s_asprintf(&nhost, "%s", p); 287 } 288 } else { 289 for (i = 0; ip_whois[i] != NULL; i++) { 290 if (strstr(buf, ip_whois[i]) == NULL) 291 continue; 292 s_asprintf(&nhost, "%s", ip_whois[i]); 293 } 294 } 295 } 296 297 if ((flags & WHOIS_INIC_FALLBACK) && nhost == NULL && 298 !nomatch && (p = strstr(buf, NO_MATCH_ID)) != NULL) { 299 p += sizeof(NO_MATCH_ID) - 1; 300 if ((len = strcspn(p, "\"")) && 301 strncasecmp(name, p, len) == 0 && 302 name[len] == '\0' && 303 strchr(name, '.') == NULL) 304 nomatch = 1; 305 } 306 printf("%s\n", buf); 307 } 308 309 /* Do second lookup as needed. */ 310 if (nomatch && nhost == NULL) { 311 printf("Looking up %s at %s.\n\n", name, INICHOST); 312 s_asprintf(&nhost, "%s", INICHOST); 313 } 314 315 if (nhost != NULL) { 316 if ((res2 = gethostinfo(nhost, 0)) == NULL) { 317 free(nhost); 318 return; 319 } 320 free(nhost); 321 whois(name, res2, 0); 322 freeaddrinfo(res2); 323 } 324 } 325 326 static void 327 usage(void) 328 { 329 fprintf(stderr, 330 "usage: whois [-adgimpQrR6] [-c country-code | -h hostname] " 331 "[-p port] name ...\n"); 332 exit(EX_USAGE); 333 } 334