Annotation of src/usr.bin/whois/whois.c, Revision 1.64
1.64 ! op 1: /* $OpenBSD: whois.c,v 1.63 2024/03/25 15:52:39 millert Exp $ */
1.1 deraadt 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.
1.26 millert 15: * 3. Neither the name of the University nor the names of its contributors
1.1 deraadt 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>
1.17 millert 34:
1.1 deraadt 35: #include <netinet/in.h>
1.5 art 36: #include <arpa/inet.h>
1.1 deraadt 37: #include <netdb.h>
1.17 millert 38:
1.18 millert 39: #include <ctype.h>
1.7 millert 40: #include <err.h>
1.35 henning 41: #include <errno.h>
1.1 deraadt 42: #include <stdio.h>
43: #include <stdlib.h>
44: #include <string.h>
45: #include <unistd.h>
46:
1.7 millert 47: #define NICHOST "whois.crsnic.net"
1.59 millert 48: #define INICHOST "whois.internic.net"
1.7 millert 49: #define DNICHOST "whois.nic.mil"
50: #define GNICHOST "whois.nic.gov"
1.4 deraadt 51: #define ANICHOST "whois.arin.net"
52: #define RNICHOST "whois.ripe.net"
53: #define PNICHOST "whois.apnic.net"
1.7 millert 54: #define RUNICHOST "whois.ripn.net"
1.6 deraadt 55: #define MNICHOST "whois.ra.net"
1.16 fgsch 56: #define LNICHOST "whois.lacnic.net"
1.41 henning 57: #define AFNICHOST "whois.afrinic.net"
1.22 millert 58: #define BNICHOST "whois.registro.br"
1.44 sthen 59: #define PDBHOST "whois.peeringdb.com"
1.52 sthen 60: #define IANAHOST "whois.iana.org"
1.6 deraadt 61: #define QNICHOST_TAIL ".whois-servers.net"
1.22 millert 62:
63: #define WHOIS_PORT "whois"
1.56 sthen 64: #define WHOIS_SERVER_ID "Registrar WHOIS Server:"
1.1 deraadt 65:
1.60 millert 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:"
1.22 millert 71:
1.35 henning 72: const char *port_whois = WHOIS_PORT;
1.41 henning 73: const char *ip_whois[] = { LNICHOST, RNICHOST, PNICHOST, BNICHOST,
74: AFNICHOST, NULL };
1.8 millert 75:
1.34 henning 76: __dead void usage(void);
77: int whois(const char *, const char *, const char *, int);
1.55 millert 78: char *choose_server(const char *, const char *, char **);
1.1 deraadt 79:
80: int
1.27 deraadt 81: main(int argc, char *argv[])
1.1 deraadt 82: {
1.18 millert 83: int ch, flags, rval;
1.55 millert 84: char *host, *name, *country;
1.1 deraadt 85:
1.39 millert 86: country = host = NULL;
1.18 millert 87: flags = rval = 0;
1.60 millert 88: while ((ch = getopt(argc, argv, "aAc:dgh:iIlmp:PqQrRS")) != -1)
1.34 henning 89: switch (ch) {
1.4 deraadt 90: case 'a':
91: host = ANICHOST;
92: break;
1.22 millert 93: case 'A':
94: host = PNICHOST;
95: break;
1.18 millert 96: case 'c':
97: country = optarg;
98: break;
1.4 deraadt 99: case 'd':
100: host = DNICHOST;
101: break;
1.7 millert 102: case 'g':
103: host = GNICHOST;
104: break;
1.1 deraadt 105: case 'h':
106: host = optarg;
107: break;
1.7 millert 108: case 'i':
109: host = INICHOST;
110: break;
1.52 sthen 111: case 'I':
112: host = IANAHOST;
113: break;
1.16 fgsch 114: case 'l':
115: host = LNICHOST;
116: break;
1.6 deraadt 117: case 'm':
118: host = MNICHOST;
119: break;
1.4 deraadt 120: case 'p':
1.35 henning 121: port_whois = optarg;
1.4 deraadt 122: break;
1.44 sthen 123: case 'P':
124: host = PDBHOST;
125: break;
1.6 deraadt 126: case 'q':
1.22 millert 127: /* deprecated, now the default */
1.8 millert 128: break;
129: case 'Q':
130: flags |= WHOIS_QUICK;
1.6 deraadt 131: break;
1.4 deraadt 132: case 'r':
133: host = RNICHOST;
134: break;
1.7 millert 135: case 'R':
136: host = RUNICHOST;
1.18 millert 137: break;
1.60 millert 138: case 'S':
139: flags |= WHOIS_SPAM_ME;
140: break;
1.1 deraadt 141: default:
142: usage();
143: }
144: argc -= optind;
145: argv += optind;
146:
1.18 millert 147: if (!argc || (country != NULL && host != NULL))
1.1 deraadt 148: usage();
1.49 deraadt 149:
1.50 deraadt 150: if (pledge("stdio dns inet", NULL) == -1)
151: err(1, "pledge");
1.1 deraadt 152:
1.18 millert 153: if (host == NULL && country == NULL && !(flags & WHOIS_QUICK))
1.22 millert 154: flags |= WHOIS_RECURSE;
1.54 millert 155: for (name = *argv; (name = *argv) != NULL; argv++) {
1.55 millert 156: char *tofree = NULL;
157: const char *server =
158: host ? host : choose_server(name, country, &tofree);
1.54 millert 159: rval += whois(name, server, port_whois, flags);
1.55 millert 160: free(tofree);
1.54 millert 161: }
162: return (rval);
1.8 millert 163: }
164:
1.34 henning 165: int
1.22 millert 166: whois(const char *query, const char *server, const char *port, int flags)
1.8 millert 167: {
1.46 millert 168: FILE *fp;
1.63 millert 169: char *p, *nhost, *buf = NULL;
170: size_t len, bufsize = 0;
1.22 millert 171: int i, s, error;
1.32 henning 172: const char *reason = NULL, *fmt;
1.20 millert 173: struct addrinfo hints, *res, *ai;
1.18 millert 174:
175: memset(&hints, 0, sizeof(hints));
176: hints.ai_flags = 0;
177: hints.ai_family = AF_UNSPEC;
178: hints.ai_socktype = SOCK_STREAM;
1.22 millert 179: error = getaddrinfo(server, port, &hints, &res);
1.18 millert 180: if (error) {
1.29 deraadt 181: if (error == EAI_SERVICE)
182: warnx("%s: bad port", port);
183: else
184: warnx("%s: %s", server, gai_strerror(error));
1.18 millert 185: return (1);
186: }
1.6 deraadt 187:
1.20 millert 188: for (s = -1, ai = res; ai != NULL; ai = ai->ai_next) {
189: s = socket(ai->ai_family, ai->ai_socktype, ai->ai_protocol);
1.34 henning 190: if (s == -1) {
1.35 henning 191: error = errno;
1.11 itojun 192: reason = "socket";
193: continue;
194: }
1.34 henning 195: if (connect(s, ai->ai_addr, ai->ai_addrlen) == -1) {
1.35 henning 196: error = errno;
1.11 itojun 197: reason = "connect";
198: close(s);
199: s = -1;
200: continue;
201: }
202: break; /*okay*/
203: }
1.58 jca 204: freeaddrinfo(res);
1.34 henning 205: if (s == -1) {
1.35 henning 206: if (reason) {
207: errno = error;
1.24 millert 208: warn("%s: %s", server, reason);
1.35 henning 209: } else
1.17 millert 210: warn("unknown error in connection attempt");
1.18 millert 211: return (1);
1.11 itojun 212: }
1.4 deraadt 213:
1.60 millert 214: if (!(flags & WHOIS_SPAM_ME) &&
215: (strcmp(server, "whois.denic.de") == 0 ||
216: strcmp(server, "de" QNICHOST_TAIL) == 0))
1.36 henning 217: fmt = "-T dn,ace -C ISO-8859-1 %s\r\n";
1.60 millert 218: else if (!(flags & WHOIS_SPAM_ME) &&
219: (strcmp(server, "whois.dk-hostmaster.dk") == 0 ||
220: strcmp(server, "dk" QNICHOST_TAIL) == 0))
1.37 mk 221: fmt = "--show-handles %s\r\n";
1.32 henning 222: else
223: fmt = "%s\r\n";
1.31 henning 224:
1.46 millert 225: fp = fdopen(s, "r+");
226: if (fp == NULL)
1.18 millert 227: err(1, "fdopen");
1.46 millert 228: fprintf(fp, fmt, query);
229: fflush(fp);
1.8 millert 230: nhost = NULL;
1.63 millert 231: while ((len = getline(&buf, &bufsize, fp)) != (size_t)-1) {
1.60 millert 232: /* Nominet */
233: if (!(flags & WHOIS_SPAM_ME) &&
234: len == 5 && strncmp(buf, "-- \r\n", 5) == 0)
235: break;
236:
1.22 millert 237: p = buf + len - 1;
1.63 millert 238: while (p > buf && isspace((unsigned char)*p))
239: *p-- = '\0';
1.34 henning 240: puts(buf);
1.8 millert 241:
1.60 millert 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"))) {
1.63 millert 248: if ((nhost = strndup(p, len)) == NULL)
249: err(1, "strndup");
1.60 millert 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: }
1.22 millert 261: }
262: }
1.60 millert 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;
1.8 millert 271: }
272: }
1.46 millert 273: fclose(fp);
1.63 millert 274: free(buf);
1.8 millert 275:
1.22 millert 276: if (nhost != NULL) {
277: error = whois(query, nhost, port, 0);
278: free(nhost);
1.8 millert 279: }
1.58 jca 280:
1.18 millert 281: return (error);
282: }
283:
284: /*
285: * If no country is specified determine the top level domain from the query.
1.19 millert 286: * If the TLD is a number, query ARIN, otherwise, use TLD.whois-server.net.
1.62 millert 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.
1.18 millert 290: */
1.34 henning 291: char *
1.55 millert 292: choose_server(const char *name, const char *country, char **tofree)
1.18 millert 293: {
1.54 millert 294: char *server;
1.18 millert 295: const char *qhead;
1.19 millert 296: char *ep;
1.58 jca 297: struct addrinfo hints, *res = NULL;
1.47 sthen 298:
299: memset(&hints, 0, sizeof(hints));
300: hints.ai_flags = 0;
301: hints.ai_family = AF_UNSPEC;
302: hints.ai_socktype = SOCK_STREAM;
1.18 millert 303:
304: if (country != NULL)
305: qhead = country;
1.19 millert 306: else if ((qhead = strrchr(name, '.')) == NULL) {
1.62 millert 307: if ((strncasecmp(name, "AS", 2) == 0) &&
1.38 henning 308: strtol(name + 2, &ep, 10) > 0 && *ep == '\0')
309: return (MNICHOST);
1.57 florian 310: else if (strchr(name, ':') != NULL) /* IPv6 address */
311: return (ANICHOST);
1.19 millert 312: else
313: return (NICHOST);
1.51 mmcc 314: } else if (isdigit((unsigned char)*(++qhead)))
1.18 millert 315: return (ANICHOST);
1.47 sthen 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: */
1.54 millert 321: if (asprintf(&server, "whois.nic.%s", qhead) == -1)
322: err(1, NULL);
1.47 sthen 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 */
1.48 sthen 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 ||
1.47 sthen 337: /* for others, if whois.nic.TLD doesn't exist, try whois-servers */
338: getaddrinfo(server, NULL, &hints, &res) != 0)) {
1.54 millert 339: free(server);
340: if (asprintf(&server, "%s%s", qhead, QNICHOST_TAIL) == -1)
341: err(1, NULL);
1.47 sthen 342: }
1.58 jca 343: if (res != NULL)
344: freeaddrinfo(res);
1.47 sthen 345:
1.55 millert 346: *tofree = server;
1.18 millert 347: return (server);
1.1 deraadt 348: }
349:
1.34 henning 350: __dead void
1.17 millert 351: usage(void)
1.1 deraadt 352: {
1.18 millert 353: extern char *__progname;
1.7 millert 354:
1.34 henning 355: fprintf(stderr,
1.61 jmc 356: "usage: %s [-AadgIilmPQRrS] [-c country-code | -h host] "
1.22 millert 357: "[-p port] name ...\n", __progname);
1.18 millert 358: exit(1);
1.1 deraadt 359: }
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