Annotation of src/usr.bin/whois/whois.c, Revision 1.18
1.18 ! millert 1: /* $OpenBSD: whois.c,v 1.17 2002/12/17 20:17:49 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.
15: * 3. All advertising materials mentioning features or use of this software
16: * must display the following acknowledgement:
17: * This product includes software developed by the University of
18: * California, Berkeley and its contributors.
19: * 4. Neither the name of the University nor the names of its contributors
20: * may be used to endorse or promote products derived from this software
21: * without specific prior written permission.
22: *
23: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
24: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
25: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
26: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
27: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
28: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
29: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
30: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
31: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
32: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33: * SUCH DAMAGE.
34: */
35:
36: #ifndef lint
1.17 millert 37: static const char copyright[] =
1.1 deraadt 38: "@(#) Copyright (c) 1980, 1993\n\
39: The Regents of the University of California. All rights reserved.\n";
40: #endif /* not lint */
41:
42: #ifndef lint
43: #if 0
1.17 millert 44: static const char sccsid[] = "@(#)whois.c 8.1 (Berkeley) 6/6/93";
1.9 millert 45: #else
1.18 ! millert 46: static const char rcsid[] = "$OpenBSD: whois.c,v 1.17 2002/12/17 20:17:49 millert Exp $";
1.1 deraadt 47: #endif
48: #endif /* not lint */
49:
50: #include <sys/types.h>
51: #include <sys/socket.h>
1.17 millert 52:
1.1 deraadt 53: #include <netinet/in.h>
1.5 art 54: #include <arpa/inet.h>
1.1 deraadt 55: #include <netdb.h>
1.17 millert 56:
1.18 ! millert 57: #include <ctype.h>
1.7 millert 58: #include <err.h>
1.1 deraadt 59: #include <stdio.h>
60: #include <stdlib.h>
61: #include <string.h>
62: #include <unistd.h>
63:
1.7 millert 64: #define NICHOST "whois.crsnic.net"
65: #define INICHOST "whois.internic.net"
66: #define DNICHOST "whois.nic.mil"
67: #define GNICHOST "whois.nic.gov"
1.4 deraadt 68: #define ANICHOST "whois.arin.net"
69: #define RNICHOST "whois.ripe.net"
70: #define PNICHOST "whois.apnic.net"
1.7 millert 71: #define RUNICHOST "whois.ripn.net"
1.6 deraadt 72: #define MNICHOST "whois.ra.net"
1.16 fgsch 73: #define LNICHOST "whois.lacnic.net"
1.18 ! millert 74: #define SNICHOST "whois.6bone.net"
! 75: #define VNICHOST "whois.networksolutions.com"
1.6 deraadt 76: #define QNICHOST_TAIL ".whois-servers.net"
1.4 deraadt 77: #define WHOIS_PORT 43
1.1 deraadt 78:
1.8 millert 79: #define WHOIS_RECURSE 0x01
80: #define WHOIS_INIC_FALLBACK 0x02
81: #define WHOIS_QUICK 0x04
82:
1.17 millert 83: static __dead void usage(void);
1.18 ! millert 84: static int whois(const char *, const char *, int);
! 85: static char *choose_server(const char *, const char *);
1.1 deraadt 86:
87: int
1.17 millert 88: main(int argc, char **argv)
1.1 deraadt 89: {
1.18 ! millert 90: int ch, flags, rval;
! 91: char *host, *name, *country, *server;
1.1 deraadt 92:
1.9 millert 93: #ifdef SOCKS
94: SOCKSinit(argv[0]);
95: #endif
1.18 ! millert 96: country = host = server = NULL;
! 97: flags = rval = 0;
! 98: while ((ch = getopt(argc, argv, "ac:dgh:ilmpqQrR6")) != -1)
1.1 deraadt 99: switch((char)ch) {
1.4 deraadt 100: case 'a':
101: host = ANICHOST;
102: break;
1.18 ! millert 103: case 'c':
! 104: country = optarg;
! 105: break;
1.4 deraadt 106: case 'd':
107: host = DNICHOST;
108: break;
1.7 millert 109: case 'g':
110: host = GNICHOST;
111: break;
1.1 deraadt 112: case 'h':
113: host = optarg;
114: break;
1.7 millert 115: case 'i':
116: host = INICHOST;
117: break;
1.16 fgsch 118: case 'l':
119: host = LNICHOST;
120: break;
1.6 deraadt 121: case 'm':
122: host = MNICHOST;
123: break;
1.4 deraadt 124: case 'p':
125: host = PNICHOST;
126: break;
1.6 deraadt 127: case 'q':
1.8 millert 128: /* default */
129: break;
130: case 'Q':
131: flags |= WHOIS_QUICK;
1.6 deraadt 132: break;
1.4 deraadt 133: case 'r':
134: host = RNICHOST;
135: break;
1.7 millert 136: case 'R':
137: host = RUNICHOST;
138: break;
1.18 ! millert 139: case '6':
! 140: host = SNICHOST;
! 141: break;
1.1 deraadt 142: default:
143: usage();
144: }
145: argc -= optind;
146: argv += optind;
147:
1.18 ! millert 148: if (!argc || (country != NULL && host != NULL))
1.1 deraadt 149: usage();
150:
1.18 ! millert 151: if (host == NULL && country == NULL && !(flags & WHOIS_QUICK))
! 152: flags |= WHOIS_INIC_FALLBACK | WHOIS_RECURSE;
! 153: for (name = *argv; (name = *argv) != NULL; argv++)
! 154: rval += whois(name, host ? host : choose_server(name, country), flags);
1.17 millert 155: exit(rval);
1.8 millert 156: }
157:
1.17 millert 158: static int
1.18 ! millert 159: whois(const char *name, const char *server, int flags)
1.8 millert 160: {
161: FILE *sfi, *sfo;
1.12 millert 162: char *buf, *p, *nhost, *nbuf = NULL;
1.8 millert 163: size_t len;
1.18 ! millert 164: int s, nomatch, error;
1.11 itojun 165: const char *reason = NULL;
1.18 ! millert 166: struct addrinfo hints, *res;
! 167:
! 168: memset(&hints, 0, sizeof(hints));
! 169: hints.ai_flags = 0;
! 170: hints.ai_family = AF_UNSPEC;
! 171: hints.ai_socktype = SOCK_STREAM;
! 172: error = getaddrinfo(server, "whois", &hints, &res);
! 173: if (error) {
! 174: warnx("%s: %s", server, gai_strerror(error));
! 175: return (1);
! 176: }
1.6 deraadt 177:
1.11 itojun 178: s = -1;
179: for (/*nothing*/; res; res = res->ai_next) {
180: s = socket(res->ai_family, res->ai_socktype, res->ai_protocol);
181: if (s < 0) {
182: reason = "socket";
183: continue;
184: }
185: if (connect(s, res->ai_addr, res->ai_addrlen) < 0) {
186: reason = "connect";
187: close(s);
188: s = -1;
189: continue;
190: }
1.4 deraadt 191:
1.11 itojun 192: break; /*okay*/
193: }
194: if (s < 0) {
195: if (reason)
1.17 millert 196: warn("%s", reason);
1.11 itojun 197: else
1.17 millert 198: warn("unknown error in connection attempt");
1.18 ! millert 199: freeaddrinfo(res);
! 200: return (1);
1.11 itojun 201: }
1.4 deraadt 202:
1.1 deraadt 203: sfi = fdopen(s, "r");
204: sfo = fdopen(s, "w");
1.4 deraadt 205: if (sfi == NULL || sfo == NULL)
1.18 ! millert 206: err(1, "fdopen");
1.8 millert 207: (void)fprintf(sfo, "%s\r\n", name);
1.1 deraadt 208: (void)fflush(sfo);
1.8 millert 209: nhost = NULL;
210: nomatch = 0;
211: while ((buf = fgetln(sfi, &len))) {
212: if (buf[len - 2] == '\r')
213: buf[len - 2] = '\0';
1.12 millert 214: else if (buf[len - 1] == '\n')
1.8 millert 215: buf[len - 1] = '\0';
1.12 millert 216: else {
1.17 millert 217: if ((nbuf = malloc(len + 1)) == NULL)
218: err(1, "malloc");
1.12 millert 219: memcpy(nbuf, buf, len);
220: nbuf[len] = '\0';
221: buf = nbuf;
222: }
1.8 millert 223:
1.18 ! millert 224: if ((flags & WHOIS_RECURSE) && nhost == NULL &&
1.8 millert 225: (p = strstr(buf, "Whois Server: "))) {
226: p += sizeof("Whois Server: ") - 1;
227: if ((len = strcspn(p, " \t\n\r"))) {
228: if ((nhost = malloc(len + 1)) == NULL)
229: err(1, "malloc");
230: memcpy(nhost, p, len);
231: nhost[len] = '\0';
232: }
233: }
1.18 ! millert 234: if ((flags & WHOIS_INIC_FALLBACK) && nhost == NULL &&
! 235: !nomatch && (p = strstr(buf, "No match for \""))) {
1.8 millert 236: p += sizeof("No match for \"") - 1;
1.10 millert 237: if ((len = strcspn(p, "\"")) && len == strlen(name) &&
1.8 millert 238: strncasecmp(name, p, len) == 0)
239: nomatch = 1;
240: }
241: (void)puts(buf);
242: }
1.18 ! millert 243: if (nbuf != NULL)
1.12 millert 244: free(nbuf);
1.8 millert 245:
246: /* Do second lookup as needed */
1.18 ! millert 247: if (nomatch && nhost == NULL) {
1.8 millert 248: (void)printf("Looking up %s at %s.\n\n", name, INICHOST);
249: nhost = INICHOST;
250: }
251: if (nhost) {
1.18 ! millert 252: error += whois(name, nhost, 0);
1.8 millert 253: if (!nomatch)
254: free(nhost);
255: }
1.18 ! millert 256: freeaddrinfo(res);
! 257: return (error);
! 258: }
! 259:
! 260: /*
! 261: * If no country is specified determine the top level domain from the query.
! 262: * If the TLD is a number, query ARIN. Otherwise, use TLD.whois-server.net.
! 263: * If the domain does not contain '.', fall back to NICHOST (or VNICHOST
! 264: * if name is a handle that starts with a '!').
! 265: */
! 266: static char *
! 267: choose_server(const char *name, const char *country)
! 268: {
! 269: static char *server;
! 270: const char *qhead;
! 271: size_t len;
! 272:
! 273: if (country != NULL)
! 274: qhead = country;
! 275: else if ((qhead = strrchr(name, '.')) == NULL)
! 276: return (*name == '!' ? VNICHOST : NICHOST);
! 277: else if (isdigit(*(++qhead)))
! 278: return (ANICHOST);
! 279: len = strlen(qhead) + sizeof(QNICHOST_TAIL);
! 280: if ((server = realloc(server, len)) == NULL)
! 281: err(1, "realloc");
! 282: strlcpy(server, qhead, len);
! 283: strlcat(server, QNICHOST_TAIL, len);
! 284: return (server);
1.1 deraadt 285: }
286:
1.17 millert 287: static __dead void
288: usage(void)
1.1 deraadt 289: {
1.18 ! millert 290: extern char *__progname;
1.7 millert 291:
292: (void)fprintf(stderr,
1.18 ! millert 293: "usage: %s [-adgilmpqQrR6] [-c country-code | -h hostname] "
! 294: "name ...\n", __progname);
! 295: exit(1);
1.1 deraadt 296: }
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