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 RNICHOST "whois.ripe.net" 69 #define PNICHOST "whois.apnic.net" 70 #define MNICHOST "whois.ra.net" 71 #define QNICHOST_TAIL ".whois-servers.net" 72 #define SNICHOST "whois.6bone.net" 73 #define BNICHOST "whois.registro.br" 74 #define DEFAULT_PORT "whois" 75 #define WHOIS_SERVER_ID "Whois Server: " 76 77 #define WHOIS_RECURSE 0x01 78 #define WHOIS_QUICK 0x02 79 80 #define ishost(h) (isalnum((unsigned char)h) || h == '.' || h == '-') 81 82 const char *ip_whois[] = { RNICHOST, PNICHOST, BNICHOST, NULL }; 83 const char *port = DEFAULT_PORT; 84 85 static char *choose_server(char *); 86 static struct addrinfo *gethostinfo(char const *host, int exit_on_error); 87 static void s_asprintf(char **ret, const char *format, ...) __printflike(2, 3); 88 static void usage(void); 89 static void whois(const char *, const char *, int); 90 91 int 92 main(int argc, char *argv[]) 93 { 94 const char *country, *host; 95 char *qnichost; 96 int ch, flags, use_qnichost; 97 98 #ifdef SOCKS 99 SOCKSinit(argv[0]); 100 #endif 101 102 country = host = qnichost = NULL; 103 flags = use_qnichost = 0; 104 while ((ch = getopt(argc, argv, "aAc:dgh:imp:QrR6")) != -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 'g': 119 host = GNICHOST; 120 break; 121 case 'h': 122 host = optarg; 123 break; 124 case 'i': 125 host = INICHOST; 126 break; 127 case 'm': 128 host = MNICHOST; 129 break; 130 case 'p': 131 port = optarg; 132 break; 133 case 'Q': 134 flags |= WHOIS_QUICK; 135 break; 136 case 'r': 137 host = RNICHOST; 138 break; 139 case 'R': 140 warnx("-R is deprecated; use '-c ru' instead"); 141 country = "ru"; 142 break; 143 case '6': 144 host = SNICHOST; 145 break; 146 case '?': 147 default: 148 usage(); 149 /* NOTREACHED */ 150 } 151 } 152 argc -= optind; 153 argv += optind; 154 155 if (!argc || (country != NULL && host != NULL)) 156 usage(); 157 158 /* 159 * If no host or country is specified determine the top level domain 160 * from the query. If the TLD is a number, query ARIN. Otherwise, use 161 * TLD.whois-server.net. If the domain does not contain '.', fall 162 * back to NICHOST. 163 */ 164 if (host == NULL && country == NULL) { 165 use_qnichost = 1; 166 host = NICHOST; 167 if (!(flags & WHOIS_QUICK)) 168 flags |= WHOIS_RECURSE; 169 } 170 while (argc-- > 0) { 171 if (country != NULL) { 172 s_asprintf(&qnichost, "%s%s", country, QNICHOST_TAIL); 173 whois(*argv, qnichost, flags); 174 } else if (use_qnichost) 175 if ((qnichost = choose_server(*argv)) != NULL) 176 whois(*argv, qnichost, flags); 177 if (qnichost == NULL) 178 whois(*argv, host, flags); 179 free(qnichost); 180 qnichost = NULL; 181 argv++; 182 } 183 exit(0); 184 } 185 186 /* 187 * This function will remove any trailing periods from domain, after which it 188 * returns a pointer to newly allocated memory containing the whois server to 189 * be queried, or a NULL if the correct server couldn't be determined. The 190 * caller must remember to free(3) the allocated memory. 191 */ 192 static char * 193 choose_server(char *domain) 194 { 195 char *pos, *retval; 196 197 for (pos = strchr(domain, '\0'); pos > domain && *--pos == '.';) 198 *pos = '\0'; 199 if (*domain == '\0') 200 errx(EX_USAGE, "can't search for a null string"); 201 while (pos > domain && *pos != '.') 202 --pos; 203 if (pos <= domain) 204 return (NULL); 205 if (isdigit((unsigned char)*++pos)) 206 s_asprintf(&retval, "%s", ANICHOST); 207 else 208 s_asprintf(&retval, "%s%s", pos, QNICHOST_TAIL); 209 return (retval); 210 } 211 212 static struct addrinfo * 213 gethostinfo(char const *host, int exit_on_error) 214 { 215 struct addrinfo hints, *res; 216 int error; 217 218 memset(&hints, 0, sizeof(hints)); 219 hints.ai_flags = 0; 220 hints.ai_family = AF_UNSPEC; 221 hints.ai_socktype = SOCK_STREAM; 222 error = getaddrinfo(host, port, &hints, &res); 223 if (error) { 224 warnx("%s: %s", host, gai_strerror(error)); 225 if (exit_on_error) 226 exit(EX_NOHOST); 227 return (NULL); 228 } 229 return (res); 230 } 231 232 /* 233 * Wrapper for asprintf(3) that exits on error. 234 */ 235 static void 236 s_asprintf(char **ret, const char *format, ...) 237 { 238 va_list ap; 239 240 va_start(ap, format); 241 if (vasprintf(ret, format, ap) == -1) { 242 va_end(ap); 243 err(EX_OSERR, "vasprintf()"); 244 } 245 va_end(ap); 246 } 247 248 static void 249 whois(const char *query, const char *hostname, int flags) 250 { 251 FILE *sfi, *sfo; 252 struct addrinfo *hostres, *res; 253 char *buf, *host, *nhost, *p; 254 int i, s; 255 size_t len; 256 257 hostres = gethostinfo(hostname, 1); 258 for (res = hostres; 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 freeaddrinfo(hostres); 267 if (res == NULL) 268 err(EX_OSERR, "connect()"); 269 270 sfi = fdopen(s, "r"); 271 sfo = fdopen(s, "w"); 272 if (sfi == NULL || sfo == NULL) 273 err(EX_OSERR, "fdopen()"); 274 fprintf(sfo, "%s\r\n", query); 275 fflush(sfo); 276 nhost = NULL; 277 while ((buf = fgetln(sfi, &len)) != NULL) { 278 while (len > 0 && isspace((unsigned char)buf[len - 1])) 279 buf[--len] = '\0'; 280 printf("%.*s\n", (int)len, buf); 281 282 if ((flags & WHOIS_RECURSE) && nhost == NULL) { 283 host = strnstr(buf, WHOIS_SERVER_ID, len); 284 if (host != NULL) { 285 host += sizeof(WHOIS_SERVER_ID) - 1; 286 for (p = host; p < buf + len; p++) { 287 if (!ishost(*p)) { 288 *p = '\0'; 289 break; 290 } 291 } 292 s_asprintf(&nhost, "%.*s", 293 (int)(buf + len - host), host); 294 } else if (strcmp(hostname, ANICHOST) == 0) { 295 for (i = 0; ip_whois[i] != NULL; i++) { 296 if (strnstr(buf, ip_whois[i], len) != 297 NULL) { 298 s_asprintf(&nhost, "%s", 299 ip_whois[i]); 300 break; 301 } 302 } 303 } 304 } 305 } 306 if (nhost != NULL) { 307 whois(query, nhost, 0); 308 free(nhost); 309 } 310 } 311 312 static void 313 usage(void) 314 { 315 fprintf(stderr, 316 "usage: whois [-aAdgimQrR6] [-c country-code | -h hostname] " 317 "[-p port] name ...\n"); 318 exit(EX_USAGE); 319 } 320