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 NICHOST "whois.crsnic.net" 64 #define INICHOST "whois.networksolutions.com" 65 #define DNICHOST "whois.nic.mil" 66 #define GNICHOST "whois.nic.gov" 67 #define ANICHOST "whois.arin.net" 68 #define LNICHOST "whois.lacnic.net" 69 #define RNICHOST "whois.ripe.net" 70 #define PNICHOST "whois.apnic.net" 71 #define MNICHOST "whois.ra.net" 72 #define QNICHOST_TAIL ".whois-servers.net" 73 #define SNICHOST "whois.6bone.net" 74 #define BNICHOST "whois.registro.br" 75 #define DEFAULT_PORT "whois" 76 #define WHOIS_SERVER_ID "Whois Server: " 77 78 #define WHOIS_RECURSE 0x01 79 #define WHOIS_QUICK 0x02 80 81 #define ishost(h) (isalnum((unsigned char)h) || h == '.' || h == '-') 82 83 const char *ip_whois[] = { LNICHOST, RNICHOST, PNICHOST, BNICHOST, NULL }; 84 const char *port = DEFAULT_PORT; 85 86 static char *choose_server(char *); 87 static struct addrinfo *gethostinfo(char const *host, int exit_on_error); 88 static void s_asprintf(char **ret, const char *format, ...) __printflike(2, 3); 89 static void usage(void); 90 static void whois(const char *, const char *, int); 91 92 int 93 main(int argc, char *argv[]) 94 { 95 const char *country, *host; 96 char *qnichost; 97 int ch, flags, use_qnichost; 98 99 #ifdef SOCKS 100 SOCKSinit(argv[0]); 101 #endif 102 103 country = host = qnichost = NULL; 104 flags = use_qnichost = 0; 105 while ((ch = getopt(argc, argv, "aAc:dgh:ilmp:QrR6")) != -1) { 106 switch (ch) { 107 case 'a': 108 host = ANICHOST; 109 break; 110 case 'A': 111 host = PNICHOST; 112 break; 113 case 'c': 114 country = optarg; 115 break; 116 case 'd': 117 host = DNICHOST; 118 break; 119 case 'g': 120 host = GNICHOST; 121 break; 122 case 'h': 123 host = optarg; 124 break; 125 case 'i': 126 host = INICHOST; 127 break; 128 case 'l': 129 host = LNICHOST; 130 break; 131 case 'm': 132 host = MNICHOST; 133 break; 134 case 'p': 135 port = optarg; 136 break; 137 case 'Q': 138 flags |= WHOIS_QUICK; 139 break; 140 case 'r': 141 host = RNICHOST; 142 break; 143 case 'R': 144 warnx("-R is deprecated; use '-c ru' instead"); 145 country = "ru"; 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 va_list ap; 243 244 va_start(ap, format); 245 if (vasprintf(ret, format, ap) == -1) { 246 va_end(ap); 247 err(EX_OSERR, "vasprintf()"); 248 } 249 va_end(ap); 250 } 251 252 static void 253 whois(const char *query, const char *hostname, int flags) 254 { 255 FILE *sfi, *sfo; 256 struct addrinfo *hostres, *res; 257 char *buf, *host, *nhost, *p; 258 int i, s; 259 size_t c, len; 260 261 hostres = gethostinfo(hostname, 1); 262 for (res = hostres; res; res = res->ai_next) { 263 s = socket(res->ai_family, res->ai_socktype, res->ai_protocol); 264 if (s < 0) 265 continue; 266 if (connect(s, res->ai_addr, res->ai_addrlen) == 0) 267 break; 268 close(s); 269 } 270 freeaddrinfo(hostres); 271 if (res == NULL) 272 err(EX_OSERR, "connect()"); 273 274 sfi = fdopen(s, "r"); 275 sfo = fdopen(s, "w"); 276 if (sfi == NULL || sfo == NULL) 277 err(EX_OSERR, "fdopen()"); 278 fprintf(sfo, "%s\r\n", query); 279 fflush(sfo); 280 nhost = NULL; 281 while ((buf = fgetln(sfi, &len)) != NULL) { 282 while (len > 0 && isspace((unsigned char)buf[len - 1])) 283 buf[--len] = '\0'; 284 printf("%.*s\n", (int)len, buf); 285 286 if ((flags & WHOIS_RECURSE) && nhost == NULL) { 287 host = strnstr(buf, WHOIS_SERVER_ID, len); 288 if (host != NULL) { 289 host += sizeof(WHOIS_SERVER_ID) - 1; 290 for (p = host; p < buf + len; p++) { 291 if (!ishost(*p)) { 292 *p = '\0'; 293 break; 294 } 295 } 296 s_asprintf(&nhost, "%.*s", 297 (int)(buf + len - host), host); 298 } else if (strcmp(hostname, ANICHOST) == 0) { 299 for (c = 0; c <= len; c++) 300 buf[c] = tolower((int)buf[c]); 301 for (i = 0; ip_whois[i] != NULL; i++) { 302 if (strnstr(buf, ip_whois[i], len) != 303 NULL) { 304 s_asprintf(&nhost, "%s", 305 ip_whois[i]); 306 break; 307 } 308 } 309 } 310 } 311 } 312 if (nhost != NULL) { 313 whois(query, nhost, 0); 314 free(nhost); 315 } 316 } 317 318 static void 319 usage(void) 320 { 321 fprintf(stderr, 322 "usage: whois [-aAdgilmQrR6] [-c country-code | -h hostname] " 323 "[-p port] name ...\n"); 324 exit(EX_USAGE); 325 } 326