1 /* vi: set sw=4 ts=4: */
3 * whois - tiny client for the whois directory service
5 * Copyright (c) 2011 Pere Orga <gotrunks@gmail.com>
6 * Licensed under GPLv2 or later, see file LICENSE in this source tree.
13 //config: bool "whois (6.3 kb)"
16 //config: whois is a client for the whois directory service
18 //applet:IF_WHOIS(APPLET(whois, BB_DIR_USR_BIN, BB_SUID_DROP))
20 //kbuild:lib-$(CONFIG_WHOIS) += whois.o
22 //usage:#define whois_trivial_usage
23 //usage: "[-i] [-h SERVER] [-p PORT] NAME..."
24 //usage:#define whois_full_usage "\n\n"
25 //usage: "Query WHOIS info about NAME\n"
26 //usage: "\n -i Show redirect results too"
27 //usage: "\n -h,-p Server to query"
35 static char *query(const char *host, int port, const char *domain)
42 /* some .io domains reported to have very long strings in whois
43 * responses, 1k was not enough:
45 char linebuf[2 * 1024];
50 printf("[Querying %s:%d '%s%s']\n", host, port, pfx, domain);
51 fd = create_and_connect_stream_or_die(host, port);
52 fdprintf(fd, "%s%s\r\n", pfx, domain);
53 fp = xfdopen_for_read(fd);
56 while (fgets(linebuf, sizeof(linebuf)-1, fp)) {
59 len = strcspn(linebuf, "\r\n");
60 linebuf[len++] = '\n';
63 buf = xrealloc(buf, bufpos + len + 1);
64 memcpy(buf + bufpos, linebuf, len);
68 if (!redir || !success) {
72 success = is_prefixed_with(linebuf, "domain:")
73 || is_prefixed_with(linebuf, "domain name:");
76 char *p = is_prefixed_with(linebuf, "whois server:");
78 p = is_prefixed_with(linebuf, "whois:");
80 redir = xstrdup(skip_whitespace(p));
84 fclose(fp); /* closes fd too */
85 if (!success && !pfx[0]) {
87 * Looking at /etc/jwhois.conf, some whois servers use
88 * "domain = DOMAIN", "DOMAIN ID <DOMAIN>"
89 * and "domain=DOMAIN_WITHOUT_LAST_COMPONENT"
90 * formats, but those are rare.
91 * (There are a few even more contrived ones.)
92 * We are trying only "domain DOMAIN", the typical one.
100 if (redir && strcmp(redir, host) == 0) {
101 /* Redirect to self does not count */
105 if (!redir || (option_mask32 & OPT_i)) {
106 /* Output saved text */
107 printf("[%s]\n%s", host, buf ? buf : "");
113 static void recursive_query(const char *host, int port, const char *domain)
115 char *free_me = NULL;
118 redir = query(host, port, domain);
121 printf("[Redirected to %s]\n", redir);
122 host = free_me = redir;
128 /* One of "big" whois implementations has these options:
131 * jwhois version 4.0, Copyright (C) 1999-2007 Free Software Foundation, Inc.
132 * -v, --verbose verbose debug output
133 * -c FILE, --config=FILE use FILE as configuration file
134 * -h HOST, --host=HOST explicitly query HOST
135 * -n, --no-redirect disable content redirection
136 * -s, --no-whoisservers disable whois-servers.net service support
137 * -a, --raw disable reformatting of the query
138 * -i, --display-redirections display all redirects instead of hiding them
139 * -p PORT, --port=PORT use port number PORT (in conjunction with HOST)
140 * -r, --rwhois force an rwhois query to be made
141 * --rwhois-display=DISPLAY sets the display option in rwhois queries
142 * --rwhois-limit=LIMIT sets the maximum number of matches to return
144 * Example of its output:
146 * [Querying whois.verisign-grs.com]
147 * [Redirected to whois.corporatedomains.com]
148 * [Querying whois.corporatedomains.com]
149 * [whois.corporatedomains.com]
150 * ...text of the reply...
152 * With -i, reply from each server is printed, after all redirects are done:
153 * [Querying whois.verisign-grs.com]
154 * [Redirected to whois.corporatedomains.com]
155 * [Querying whois.corporatedomains.com]
156 * [whois.verisign-grs.com]
157 * ...text of the reply...
158 * [whois.corporatedomains.com]
159 * ...text of the reply...
161 * With -a, no "DOMAIN" -> "domain DOMAIN" transformation is attempted.
163 * With -n, the first reply is shown, redirects are not followed:
164 * [Querying whois.verisign-grs.com]
165 * [whois.verisign-grs.com]
166 * ...text of the reply...
169 int whois_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
170 int whois_main(int argc UNUSED_PARAM, char **argv)
173 const char *host = "whois.iana.org";
175 getopt32(argv, "^" "ih:p:+" "\0" "-1", &host, &port);
179 recursive_query(host, port, *argv);