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 * 4. Neither the name of the University nor the names of its contributors
14 *    may be used to endorse or promote products derived from this software
15 *    without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
28 */
29
30#ifndef lint
31static const char copyright[] =
32"@(#) Copyright (c) 1980, 1993\n\
33	The Regents of the University of California.  All rights reserved.\n";
34#endif /* not lint */
35
36#if 0
37#ifndef lint
38static char sccsid[] = "@(#)whois.c	8.1 (Berkeley) 6/6/93";
39#endif /* not lint */
40#endif
41
42#include <sys/cdefs.h>
43__FBSDID("$FreeBSD$");
44
45#include <sys/types.h>
46#include <sys/socket.h>
47#include <netinet/in.h>
48#include <arpa/inet.h>
49#include <ctype.h>
50#include <err.h>
51#include <netdb.h>
52#include <stdarg.h>
53#include <stdio.h>
54#include <stdlib.h>
55#include <string.h>
56#include <sysexits.h>
57#include <unistd.h>
58
59#define	ABUSEHOST	"whois.abuse.net"
60#define	NICHOST		"whois.crsnic.net"
61#define	INICHOST	"whois.networksolutions.com"
62#define	GNICHOST	"whois.nic.gov"
63#define	ANICHOST	"whois.arin.net"
64#define	LNICHOST	"whois.lacnic.net"
65#define	KNICHOST	"whois.krnic.net"
66#define	RNICHOST	"whois.ripe.net"
67#define	PNICHOST	"whois.apnic.net"
68#define	MNICHOST	"whois.ra.net"
69#define	QNICHOST_TAIL	".whois-servers.net"
70#define	BNICHOST	"whois.registro.br"
71#define NORIDHOST	"whois.norid.no"
72#define	IANAHOST	"whois.iana.org"
73#define GERMNICHOST	"de.whois-servers.net"
74#define FNICHOST	"whois.afrinic.net"
75#define	DEFAULT_PORT	"whois"
76#define	WHOIS_SERVER_ID	"Whois Server: "
77#define	WHOIS_ORG_SERVER_ID	"Registrant Street1:Whois Server:"
78
79#define WHOIS_RECURSE		0x01
80#define WHOIS_QUICK		0x02
81
82#define ishost(h) (isalnum((unsigned char)h) || h == '.' || h == '-')
83
84static const char *ip_whois[] = { LNICHOST, RNICHOST, PNICHOST, BNICHOST,
85				  FNICHOST, NULL };
86static const char *port = DEFAULT_PORT;
87
88static char *choose_server(char *);
89static struct addrinfo *gethostinfo(char const *host, int exit_on_error);
90static void s_asprintf(char **ret, const char *format, ...) __printflike(2, 3);
91static void usage(void);
92static void whois(const char *, const char *, int);
93
94int
95main(int argc, char *argv[])
96{
97	const char *country, *host;
98	char *qnichost;
99	int ch, flags, use_qnichost;
100
101#ifdef	SOCKS
102	SOCKSinit(argv[0]);
103#endif
104
105	country = host = qnichost = NULL;
106	flags = use_qnichost = 0;
107	while ((ch = getopt(argc, argv, "aAbc:fgh:iIklmp:QrR6")) != -1) {
108		switch (ch) {
109		case 'a':
110			host = ANICHOST;
111			break;
112		case 'A':
113			host = PNICHOST;
114			break;
115		case 'b':
116			host = ABUSEHOST;
117			break;
118		case 'c':
119			country = optarg;
120			break;
121		case 'f':
122			host = FNICHOST;
123			break;
124		case 'g':
125			host = GNICHOST;
126			break;
127		case 'h':
128			host = optarg;
129			break;
130		case 'i':
131			host = INICHOST;
132			break;
133		case 'I':
134			host = IANAHOST;
135			break;
136		case 'k':
137			host = KNICHOST;
138			break;
139		case 'l':
140			host = LNICHOST;
141			break;
142		case 'm':
143			host = MNICHOST;
144			break;
145		case 'p':
146			port = optarg;
147			break;
148		case 'Q':
149			flags |= WHOIS_QUICK;
150			break;
151		case 'r':
152			host = RNICHOST;
153			break;
154		case 'R':
155			warnx("-R is deprecated; use '-c ru' instead");
156			country = "ru";
157			break;
158		/* Remove in FreeBSD 10 */
159		case '6':
160			errx(EX_USAGE,
161				"-6 is deprecated; use -[aAflr] instead");
162			break;
163		case '?':
164		default:
165			usage();
166			/* NOTREACHED */
167		}
168	}
169	argc -= optind;
170	argv += optind;
171
172	if (!argc || (country != NULL && host != NULL))
173		usage();
174
175	/*
176	 * If no host or country is specified determine the top level domain
177	 * from the query.  If the TLD is a number, query ARIN.  Otherwise, use
178	 * TLD.whois-server.net.  If the domain does not contain '.', fall
179	 * back to NICHOST.
180	 */
181	if (host == NULL && country == NULL) {
182		use_qnichost = 1;
183		host = NICHOST;
184		if (!(flags & WHOIS_QUICK))
185			flags |= WHOIS_RECURSE;
186	}
187	while (argc-- > 0) {
188		if (country != NULL) {
189			s_asprintf(&qnichost, "%s%s", country, QNICHOST_TAIL);
190			whois(*argv, qnichost, flags);
191		} else if (use_qnichost)
192			if ((qnichost = choose_server(*argv)) != NULL)
193				whois(*argv, qnichost, flags);
194		if (qnichost == NULL)
195			whois(*argv, host, flags);
196		free(qnichost);
197		qnichost = NULL;
198		argv++;
199	}
200	exit(0);
201}
202
203/*
204 * This function will remove any trailing periods from domain, after which it
205 * returns a pointer to newly allocated memory containing the whois server to
206 * be queried, or a NULL if the correct server couldn't be determined.  The
207 * caller must remember to free(3) the allocated memory.
208 */
209static char *
210choose_server(char *domain)
211{
212	char *pos, *retval;
213
214	if (strchr(domain, ':')) {
215		s_asprintf(&retval, "%s", ANICHOST);
216		return (retval);
217	}
218	for (pos = strchr(domain, '\0'); pos > domain && *--pos == '.';)
219		*pos = '\0';
220	if (*domain == '\0')
221		errx(EX_USAGE, "can't search for a null string");
222	if (strlen(domain) > sizeof("-NORID")-1 &&
223	    strcasecmp(domain + strlen(domain) - sizeof("-NORID") + 1,
224		"-NORID") == 0) {
225		s_asprintf(&retval, "%s", NORIDHOST);
226		return (retval);
227	}
228	while (pos > domain && *pos != '.')
229		--pos;
230	if (pos <= domain)
231		return (NULL);
232	if (isdigit((unsigned char)*++pos))
233		s_asprintf(&retval, "%s", ANICHOST);
234	else
235		s_asprintf(&retval, "%s%s", pos, QNICHOST_TAIL);
236	return (retval);
237}
238
239static struct addrinfo *
240gethostinfo(char const *host, int exit_on_error)
241{
242	struct addrinfo hints, *res;
243	int error;
244
245	memset(&hints, 0, sizeof(hints));
246	hints.ai_flags = 0;
247	hints.ai_family = AF_UNSPEC;
248	hints.ai_socktype = SOCK_STREAM;
249	error = getaddrinfo(host, port, &hints, &res);
250	if (error) {
251		warnx("%s: %s", host, gai_strerror(error));
252		if (exit_on_error)
253			exit(EX_NOHOST);
254		return (NULL);
255	}
256	return (res);
257}
258
259/*
260 * Wrapper for asprintf(3) that exits on error.
261 */
262static void
263s_asprintf(char **ret, const char *format, ...)
264{
265	va_list ap;
266
267	va_start(ap, format);
268	if (vasprintf(ret, format, ap) == -1) {
269		va_end(ap);
270		err(EX_OSERR, "vasprintf()");
271	}
272	va_end(ap);
273}
274
275static void
276whois(const char *query, const char *hostname, int flags)
277{
278	FILE *sfi, *sfo;
279	struct addrinfo *hostres, *res;
280	char *buf, *host, *nhost, *p;
281	int i, s;
282	size_t c, len;
283
284	s = -1;
285	hostres = gethostinfo(hostname, 1);
286	for (res = hostres; res; res = res->ai_next) {
287		s = socket(res->ai_family, res->ai_socktype, res->ai_protocol);
288		if (s < 0)
289			continue;
290		if (connect(s, res->ai_addr, res->ai_addrlen) == 0)
291			break;
292		close(s);
293	}
294	freeaddrinfo(hostres);
295	if (res == NULL)
296		err(EX_OSERR, "connect()");
297
298	sfi = fdopen(s, "r");
299	sfo = fdopen(s, "w");
300	if (sfi == NULL || sfo == NULL)
301		err(EX_OSERR, "fdopen()");
302	if (strcmp(hostname, GERMNICHOST) == 0) {
303		fprintf(sfo, "-T dn,ace -C US-ASCII %s\r\n", query);
304	} else if (strcmp(hostname, "dk" QNICHOST_TAIL) == 0) {
305		fprintf(sfo, "--show-handles %s\r\n", query);
306	} else {
307		fprintf(sfo, "%s\r\n", query);
308	}
309	fflush(sfo);
310	nhost = NULL;
311	while ((buf = fgetln(sfi, &len)) != NULL) {
312		while (len > 0 && isspace((unsigned char)buf[len - 1]))
313			buf[--len] = '\0';
314		printf("%.*s\n", (int)len, buf);
315
316		if ((flags & WHOIS_RECURSE) && nhost == NULL) {
317			host = strnstr(buf, WHOIS_SERVER_ID, len);
318			if (host != NULL) {
319				host += sizeof(WHOIS_SERVER_ID) - 1;
320				for (p = host; p < buf + len; p++) {
321					if (!ishost(*p)) {
322						*p = '\0';
323						break;
324					}
325				}
326				s_asprintf(&nhost, "%.*s",
327				     (int)(buf + len - host), host);
328			} else if ((host =
329			    strnstr(buf, WHOIS_ORG_SERVER_ID, len)) != NULL) {
330				host += sizeof(WHOIS_ORG_SERVER_ID) - 1;
331				for (p = host; p < buf + len; p++) {
332					if (!ishost(*p)) {
333						*p = '\0';
334						break;
335					}
336				}
337				s_asprintf(&nhost, "%.*s",
338				    (int)(buf + len - host), host);
339			} else if (strcmp(hostname, ANICHOST) == 0) {
340				for (c = 0; c <= len; c++)
341					buf[c] = tolower((unsigned char)buf[c]);
342				for (i = 0; ip_whois[i] != NULL; i++) {
343					if (strnstr(buf, ip_whois[i], len) !=
344					    NULL) {
345						s_asprintf(&nhost, "%s",
346						    ip_whois[i]);
347						break;
348					}
349				}
350			}
351		}
352	}
353	if (nhost != NULL) {
354		whois(query, nhost, 0);
355		free(nhost);
356	}
357}
358
359static void
360usage(void)
361{
362	fprintf(stderr,
363	    "usage: whois [-aAbfgiIklmQrR6] [-c country-code | -h hostname] "
364	    "[-p port] name ...\n");
365	exit(EX_USAGE);
366}
367