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 * @(#) Copyright (c) 1980, 1993 The Regents of the University of California. All rights reserved. 34 * @(#)whois.c 8.1 (Berkeley) 6/6/93 35 * $FreeBSD: src/usr.bin/whois/whois.c,v 1.15.2.11 2003/02/25 20:59:41 roberto Exp $ 36 * $DragonFly: src/usr.bin/whois/whois.c,v 1.2 2003/06/17 04:29:33 dillon Exp $ 37 */ 38 39 #include <sys/types.h> 40 #include <sys/socket.h> 41 #include <netinet/in.h> 42 #include <arpa/inet.h> 43 #include <ctype.h> 44 #include <err.h> 45 #include <netdb.h> 46 #include <stdarg.h> 47 #include <stdio.h> 48 #include <stdlib.h> 49 #include <string.h> 50 #include <sysexits.h> 51 #include <unistd.h> 52 53 #define NICHOST "whois.crsnic.net" 54 #define INICHOST "whois.networksolutions.com" 55 #define DNICHOST "whois.nic.mil" 56 #define GNICHOST "whois.nic.gov" 57 #define ANICHOST "whois.arin.net" 58 #define LNICHOST "whois.lacnic.net" 59 #define RNICHOST "whois.ripe.net" 60 #define PNICHOST "whois.apnic.net" 61 #define RUNICHOST "whois.ripn.net" 62 #define MNICHOST "whois.ra.net" 63 #define QNICHOST_TAIL ".whois-servers.net" 64 #define SNICHOST "whois.6bone.net" 65 #define BNICHOST "whois.registro.br" 66 #define WHOIS_SERVER_ID "Whois Server: " 67 #define WHOIS_ORG_SERVER_ID "Registrant Street1:Whois Server:" 68 69 #define WHOIS_RECURSE 0x01 70 #define WHOIS_QUICK 0x02 71 72 #define ishost(h) (isalnum((unsigned char)h) || h == '.' || h == '-') 73 74 const char *ip_whois[] = { LNICHOST, RNICHOST, PNICHOST, BNICHOST, NULL }; 75 76 static char *choose_server(char *); 77 static struct addrinfo *gethostinfo(char const *host, int exit_on_error); 78 static void s_asprintf(char **ret, const char *format, ...); 79 static void usage(void); 80 static void whois(const char *, const char *, int); 81 82 int 83 main(int argc, char *argv[]) 84 { 85 const char *country, *host; 86 char *qnichost; 87 int ch, flags, use_qnichost; 88 89 #ifdef SOCKS 90 SOCKSinit(argv[0]); 91 #endif 92 93 country = host = qnichost = NULL; 94 flags = use_qnichost = 0; 95 while ((ch = getopt(argc, argv, "ac:dgh:ilmpQrR6")) != -1) { 96 switch (ch) { 97 case 'a': 98 host = ANICHOST; 99 break; 100 case 'c': 101 country = optarg; 102 break; 103 case 'd': 104 host = DNICHOST; 105 break; 106 case 'g': 107 host = GNICHOST; 108 break; 109 case 'h': 110 host = optarg; 111 break; 112 case 'i': 113 host = INICHOST; 114 break; 115 case 'l': 116 host = LNICHOST; 117 break; 118 case 'm': 119 host = MNICHOST; 120 break; 121 case 'p': 122 host = PNICHOST; 123 break; 124 case 'Q': 125 flags |= WHOIS_QUICK; 126 break; 127 case 'r': 128 host = RNICHOST; 129 break; 130 case 'R': 131 host = RUNICHOST; 132 break; 133 case '6': 134 host = SNICHOST; 135 break; 136 case '?': 137 default: 138 usage(); 139 /* NOTREACHED */ 140 } 141 } 142 argc -= optind; 143 argv += optind; 144 145 if (!argc || (country != NULL && host != NULL)) 146 usage(); 147 148 /* 149 * If no host or country is specified determine the top level domain 150 * from the query. If the TLD is a number, query ARIN. Otherwise, use 151 * TLD.whois-server.net. If the domain does not contain '.', fall 152 * back to NICHOST. 153 */ 154 if (host == NULL && country == NULL) { 155 use_qnichost = 1; 156 host = NICHOST; 157 if (!(flags & WHOIS_QUICK)) 158 flags |= WHOIS_RECURSE; 159 } 160 while (argc-- > 0) { 161 if (country != NULL) { 162 s_asprintf(&qnichost, "%s%s", country, QNICHOST_TAIL); 163 whois(*argv, qnichost, flags); 164 } else if (use_qnichost) 165 if ((qnichost = choose_server(*argv)) != NULL) 166 whois(*argv, qnichost, flags); 167 if (qnichost == NULL) 168 whois(*argv, host, flags); 169 free(qnichost); 170 qnichost = NULL; 171 argv++; 172 } 173 exit(0); 174 } 175 176 /* 177 * This function will remove any trailing periods from domain, after which it 178 * returns a pointer to newly allocated memory containing the whois server to 179 * be queried, or a NULL if the correct server couldn't be determined. The 180 * caller must remember to free(3) the allocated memory. 181 */ 182 static char * 183 choose_server(char *domain) 184 { 185 char *pos, *retval; 186 187 for (pos = strchr(domain, '\0'); pos > domain && *--pos == '.';) 188 *pos = '\0'; 189 if (*domain == '\0') 190 errx(EX_USAGE, "can't search for a null string"); 191 while (pos > domain && *pos != '.') 192 --pos; 193 if (pos <= domain) 194 return (NULL); 195 if (isdigit((unsigned char)*++pos)) 196 s_asprintf(&retval, "%s", ANICHOST); 197 else 198 s_asprintf(&retval, "%s%s", pos, QNICHOST_TAIL); 199 return (retval); 200 } 201 202 static struct addrinfo * 203 gethostinfo(char const *host, int exit_on_error) 204 { 205 struct addrinfo hints, *res; 206 int error; 207 208 memset(&hints, 0, sizeof(hints)); 209 hints.ai_flags = 0; 210 hints.ai_family = AF_UNSPEC; 211 hints.ai_socktype = SOCK_STREAM; 212 error = getaddrinfo(host, "whois", &hints, &res); 213 if (error) { 214 warnx("%s: %s", host, gai_strerror(error)); 215 if (exit_on_error) 216 exit(EX_NOHOST); 217 return (NULL); 218 } 219 return (res); 220 } 221 222 /* 223 * Wrapper for asprintf(3) that exits on error. 224 */ 225 static void 226 s_asprintf(char **ret, const char *format, ...) 227 { 228 va_list ap; 229 230 va_start(ap, format); 231 if (vasprintf(ret, format, ap) == -1) { 232 va_end(ap); 233 err(EX_OSERR, "vasprintf()"); 234 } 235 va_end(ap); 236 } 237 238 static void 239 whois(const char *query, const char *hostname, int flags) 240 { 241 FILE *sfi, *sfo; 242 struct addrinfo *hostres, *res; 243 char *buf, *host, *nhost, *p; 244 int i, s; 245 size_t c, len; 246 247 hostres = gethostinfo(hostname, 1); 248 for (res = hostres; res; res = res->ai_next) { 249 s = socket(res->ai_family, res->ai_socktype, res->ai_protocol); 250 if (s < 0) 251 continue; 252 if (connect(s, res->ai_addr, res->ai_addrlen) == 0) 253 break; 254 close(s); 255 } 256 freeaddrinfo(hostres); 257 if (res == NULL) 258 err(EX_OSERR, "connect()"); 259 260 sfi = fdopen(s, "r"); 261 sfo = fdopen(s, "w"); 262 if (sfi == NULL || sfo == NULL) 263 err(EX_OSERR, "fdopen()"); 264 fprintf(sfo, "%s\r\n", query); 265 fflush(sfo); 266 nhost = NULL; 267 while ((buf = fgetln(sfi, &len)) != NULL) { 268 while (len > 0 && isspace((unsigned char)buf[len - 1])) 269 buf[--len] = '\0'; 270 printf("%.*s\n", (int)len, buf); 271 272 if ((flags & WHOIS_RECURSE) && nhost == NULL) { 273 host = strnstr(buf, WHOIS_SERVER_ID, len); 274 if (host != NULL) { 275 host += sizeof(WHOIS_SERVER_ID) - 1; 276 for (p = host; p < buf + len; p++) { 277 if (!ishost(*p)) { 278 *p = '\0'; 279 break; 280 } 281 } 282 s_asprintf(&nhost, "%.*s", 283 (int)(buf + len - host), host); 284 } else if ((host = 285 strnstr(buf, WHOIS_ORG_SERVER_ID, len)) != NULL) { 286 host += sizeof(WHOIS_ORG_SERVER_ID) - 1; 287 for (p = host; p < buf + len; p++) { 288 if (!ishost(*p)) { 289 *p = '\0'; 290 break; 291 } 292 } 293 s_asprintf(&nhost, "%.*s", 294 (int)(buf + len - host), host); 295 } else if (strcmp(hostname, ANICHOST) == 0) { 296 for (c = 0; c <= len; c++) 297 buf[c] = tolower((int)buf[c]); 298 for (i = 0; ip_whois[i] != NULL; i++) { 299 if (strnstr(buf, ip_whois[i], len) != 300 NULL) { 301 s_asprintf(&nhost, "%s", 302 ip_whois[i]); 303 break; 304 } 305 } 306 } 307 } 308 } 309 if (nhost != NULL) { 310 whois(query, nhost, 0); 311 free(nhost); 312 } 313 } 314 315 static void 316 usage(void) 317 { 318 fprintf(stderr, 319 "usage: whois [-adgilmpQrR6] [-c country-code | -h hostname] " 320 "name ...\n"); 321 exit(EX_USAGE); 322 } 323