1 /* $OpenBSD: whois.c,v 1.64 2024/03/25 19:11:52 op Exp $ */
2
3 /*
4 * Copyright (c) 1980, 1993
5 * The Regents of the University of California. All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 * 3. Neither the name of the University nor the names of its contributors
16 * may be used to endorse or promote products derived from this software
17 * without specific prior written permission.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 * SUCH DAMAGE.
30 */
31
32 #include <sys/types.h>
33 #include <sys/socket.h>
34
35 #include <netinet/in.h>
36 #include <arpa/inet.h>
37 #include <netdb.h>
38
39 #include <ctype.h>
40 #include <err.h>
41 #include <errno.h>
42 #include <stdio.h>
43 #include <stdlib.h>
44 #include <string.h>
45 #include <unistd.h>
46
47 #define NICHOST "whois.crsnic.net"
48 #define INICHOST "whois.internic.net"
49 #define DNICHOST "whois.nic.mil"
50 #define GNICHOST "whois.nic.gov"
51 #define ANICHOST "whois.arin.net"
52 #define RNICHOST "whois.ripe.net"
53 #define PNICHOST "whois.apnic.net"
54 #define RUNICHOST "whois.ripn.net"
55 #define MNICHOST "whois.ra.net"
56 #define LNICHOST "whois.lacnic.net"
57 #define AFNICHOST "whois.afrinic.net"
58 #define BNICHOST "whois.registro.br"
59 #define PDBHOST "whois.peeringdb.com"
60 #define IANAHOST "whois.iana.org"
61 #define QNICHOST_TAIL ".whois-servers.net"
62
63 #define WHOIS_PORT "whois"
64 #define WHOIS_SERVER_ID "Registrar WHOIS Server:"
65
66 #define WHOIS_RECURSE 0x01
67 #define WHOIS_QUICK 0x02
68 #define WHOIS_SPAM_ME 0x04
69
70 #define CHOPSPAM ">>> Last update of WHOIS database:"
71
72 const char *port_whois = WHOIS_PORT;
73 const char *ip_whois[] = { LNICHOST, RNICHOST, PNICHOST, BNICHOST,
74 AFNICHOST, NULL };
75
76 __dead void usage(void);
77 int whois(const char *, const char *, const char *, int);
78 char *choose_server(const char *, const char *, char **);
79
80 int
main(int argc,char * argv[])81 main(int argc, char *argv[])
82 {
83 int ch, flags, rval;
84 char *host, *name, *country;
85
86 country = host = NULL;
87 flags = rval = 0;
88 while ((ch = getopt(argc, argv, "aAc:dgh:iIlmp:PqQrRS")) != -1)
89 switch (ch) {
90 case 'a':
91 host = ANICHOST;
92 break;
93 case 'A':
94 host = PNICHOST;
95 break;
96 case 'c':
97 country = optarg;
98 break;
99 case 'd':
100 host = DNICHOST;
101 break;
102 case 'g':
103 host = GNICHOST;
104 break;
105 case 'h':
106 host = optarg;
107 break;
108 case 'i':
109 host = INICHOST;
110 break;
111 case 'I':
112 host = IANAHOST;
113 break;
114 case 'l':
115 host = LNICHOST;
116 break;
117 case 'm':
118 host = MNICHOST;
119 break;
120 case 'p':
121 port_whois = optarg;
122 break;
123 case 'P':
124 host = PDBHOST;
125 break;
126 case 'q':
127 /* deprecated, now the default */
128 break;
129 case 'Q':
130 flags |= WHOIS_QUICK;
131 break;
132 case 'r':
133 host = RNICHOST;
134 break;
135 case 'R':
136 host = RUNICHOST;
137 break;
138 case 'S':
139 flags |= WHOIS_SPAM_ME;
140 break;
141 default:
142 usage();
143 }
144 argc -= optind;
145 argv += optind;
146
147 if (!argc || (country != NULL && host != NULL))
148 usage();
149
150 if (pledge("stdio dns inet", NULL) == -1)
151 err(1, "pledge");
152
153 if (host == NULL && country == NULL && !(flags & WHOIS_QUICK))
154 flags |= WHOIS_RECURSE;
155 for (name = *argv; (name = *argv) != NULL; argv++) {
156 char *tofree = NULL;
157 const char *server =
158 host ? host : choose_server(name, country, &tofree);
159 rval += whois(name, server, port_whois, flags);
160 free(tofree);
161 }
162 return (rval);
163 }
164
165 int
whois(const char * query,const char * server,const char * port,int flags)166 whois(const char *query, const char *server, const char *port, int flags)
167 {
168 FILE *fp;
169 char *p, *nhost, *buf = NULL;
170 size_t len, bufsize = 0;
171 int i, s, error;
172 const char *reason = NULL, *fmt;
173 struct addrinfo hints, *res, *ai;
174
175 memset(&hints, 0, sizeof(hints));
176 hints.ai_flags = 0;
177 hints.ai_family = AF_UNSPEC;
178 hints.ai_socktype = SOCK_STREAM;
179 error = getaddrinfo(server, port, &hints, &res);
180 if (error) {
181 if (error == EAI_SERVICE)
182 warnx("%s: bad port", port);
183 else
184 warnx("%s: %s", server, gai_strerror(error));
185 return (1);
186 }
187
188 for (s = -1, ai = res; ai != NULL; ai = ai->ai_next) {
189 s = socket(ai->ai_family, ai->ai_socktype, ai->ai_protocol);
190 if (s == -1) {
191 error = errno;
192 reason = "socket";
193 continue;
194 }
195 if (connect(s, ai->ai_addr, ai->ai_addrlen) == -1) {
196 error = errno;
197 reason = "connect";
198 close(s);
199 s = -1;
200 continue;
201 }
202 break; /*okay*/
203 }
204 freeaddrinfo(res);
205 if (s == -1) {
206 if (reason) {
207 errno = error;
208 warn("%s: %s", server, reason);
209 } else
210 warn("unknown error in connection attempt");
211 return (1);
212 }
213
214 if (!(flags & WHOIS_SPAM_ME) &&
215 (strcmp(server, "whois.denic.de") == 0 ||
216 strcmp(server, "de" QNICHOST_TAIL) == 0))
217 fmt = "-T dn,ace -C ISO-8859-1 %s\r\n";
218 else if (!(flags & WHOIS_SPAM_ME) &&
219 (strcmp(server, "whois.dk-hostmaster.dk") == 0 ||
220 strcmp(server, "dk" QNICHOST_TAIL) == 0))
221 fmt = "--show-handles %s\r\n";
222 else
223 fmt = "%s\r\n";
224
225 fp = fdopen(s, "r+");
226 if (fp == NULL)
227 err(1, "fdopen");
228 fprintf(fp, fmt, query);
229 fflush(fp);
230 nhost = NULL;
231 while ((len = getline(&buf, &bufsize, fp)) != (size_t)-1) {
232 /* Nominet */
233 if (!(flags & WHOIS_SPAM_ME) &&
234 len == 5 && strncmp(buf, "-- \r\n", 5) == 0)
235 break;
236
237 p = buf + len - 1;
238 while (p > buf && isspace((unsigned char)*p))
239 *p-- = '\0';
240 puts(buf);
241
242 if (nhost == NULL && (flags & WHOIS_RECURSE)) {
243 if ((p = strstr(buf, WHOIS_SERVER_ID))) {
244 p += sizeof(WHOIS_SERVER_ID) - 1;
245 while (isblank((unsigned char)*p))
246 p++;
247 if ((len = strcspn(p, " \t\n\r"))) {
248 if ((nhost = strndup(p, len)) == NULL)
249 err(1, "strndup");
250 }
251 } else if (strcmp(server, ANICHOST) == 0) {
252 for (p = buf; *p != '\0'; p++)
253 *p = tolower((unsigned char)*p);
254 for (i = 0; ip_whois[i] != NULL; i++) {
255 if (strstr(buf, ip_whois[i]) != NULL) {
256 nhost = strdup(ip_whois[i]);
257 if (nhost == NULL)
258 err(1, "strdup");
259 break;
260 }
261 }
262 }
263 }
264
265 /* Verisign etc. */
266 if (!(flags & WHOIS_SPAM_ME) &&
267 (strncasecmp(buf, CHOPSPAM, sizeof(CHOPSPAM)-1) == 0 ||
268 strncasecmp(buf, &CHOPSPAM[4], sizeof(CHOPSPAM)-5) == 0)) {
269 printf("\n");
270 break;
271 }
272 }
273 fclose(fp);
274 free(buf);
275
276 if (nhost != NULL) {
277 error = whois(query, nhost, port, 0);
278 free(nhost);
279 }
280
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 ASN (starts
288 * with AS) or IPv6 address (contains ':').
289 * Fall back to NICHOST for the non-handle and non-IPv6 case.
290 */
291 char *
choose_server(const char * name,const char * country,char ** tofree)292 choose_server(const char *name, const char *country, char **tofree)
293 {
294 char *server;
295 const char *qhead;
296 char *ep;
297 struct addrinfo hints, *res = NULL;
298
299 memset(&hints, 0, sizeof(hints));
300 hints.ai_flags = 0;
301 hints.ai_family = AF_UNSPEC;
302 hints.ai_socktype = SOCK_STREAM;
303
304 if (country != NULL)
305 qhead = country;
306 else if ((qhead = strrchr(name, '.')) == NULL) {
307 if ((strncasecmp(name, "AS", 2) == 0) &&
308 strtol(name + 2, &ep, 10) > 0 && *ep == '\0')
309 return (MNICHOST);
310 else if (strchr(name, ':') != NULL) /* IPv6 address */
311 return (ANICHOST);
312 else
313 return (NICHOST);
314 } else if (isdigit((unsigned char)*(++qhead)))
315 return (ANICHOST);
316
317 /*
318 * Post-2003 ("new") gTLDs are all supposed to have "whois.nic.domain"
319 * (per registry agreement), some older gTLDs also support this...
320 */
321 if (asprintf(&server, "whois.nic.%s", qhead) == -1)
322 err(1, NULL);
323
324 /* most ccTLDs don't do this, but QNICHOST/whois-servers mostly works */
325 if ((strlen(qhead) == 2 ||
326 /* and is required for most of the <=2003 TLDs/gTLDs */
327 strcasecmp(qhead, "org") == 0 ||
328 strcasecmp(qhead, "com") == 0 ||
329 strcasecmp(qhead, "net") == 0 ||
330 strcasecmp(qhead, "cat") == 0 ||
331 strcasecmp(qhead, "pro") == 0 ||
332 strcasecmp(qhead, "info") == 0 ||
333 strcasecmp(qhead, "aero") == 0 ||
334 strcasecmp(qhead, "jobs") == 0 ||
335 strcasecmp(qhead, "mobi") == 0 ||
336 strcasecmp(qhead, "museum") == 0 ||
337 /* for others, if whois.nic.TLD doesn't exist, try whois-servers */
338 getaddrinfo(server, NULL, &hints, &res) != 0)) {
339 free(server);
340 if (asprintf(&server, "%s%s", qhead, QNICHOST_TAIL) == -1)
341 err(1, NULL);
342 }
343 if (res != NULL)
344 freeaddrinfo(res);
345
346 *tofree = server;
347 return (server);
348 }
349
350 __dead void
usage(void)351 usage(void)
352 {
353 extern char *__progname;
354
355 fprintf(stderr,
356 "usage: %s [-AadgIilmPQRrS] [-c country-code | -h host] "
357 "[-p port] name ...\n", __progname);
358 exit(1);
359 }
360