File: | src/usr.bin/whois/whois.c |
Warning: | line 150, column 7 Value stored to 'name' is never read |
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1 | /* $OpenBSD: whois.c,v 1.58 2018/06/19 11:28:11 jca 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(*__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" "whois.crsnic.net" |
48 | #define INICHOST"whois.networksolutions.com" "whois.networksolutions.com" |
49 | #define CNICHOST"whois.corenic.net" "whois.corenic.net" |
50 | #define DNICHOST"whois.nic.mil" "whois.nic.mil" |
51 | #define GNICHOST"whois.nic.gov" "whois.nic.gov" |
52 | #define ANICHOST"whois.arin.net" "whois.arin.net" |
53 | #define RNICHOST"whois.ripe.net" "whois.ripe.net" |
54 | #define PNICHOST"whois.apnic.net" "whois.apnic.net" |
55 | #define RUNICHOST"whois.ripn.net" "whois.ripn.net" |
56 | #define MNICHOST"whois.ra.net" "whois.ra.net" |
57 | #define LNICHOST"whois.lacnic.net" "whois.lacnic.net" |
58 | #define AFNICHOST"whois.afrinic.net" "whois.afrinic.net" |
59 | #define BNICHOST"whois.registro.br" "whois.registro.br" |
60 | #define PDBHOST"whois.peeringdb.com" "whois.peeringdb.com" |
61 | #define IANAHOST"whois.iana.org" "whois.iana.org" |
62 | #define QNICHOST_TAIL".whois-servers.net" ".whois-servers.net" |
63 | |
64 | #define WHOIS_PORT"whois" "whois" |
65 | #define WHOIS_SERVER_ID"Registrar WHOIS Server:" "Registrar WHOIS Server:" |
66 | |
67 | #define WHOIS_RECURSE0x01 0x01 |
68 | #define WHOIS_QUICK0x02 0x02 |
69 | |
70 | const char *port_whois = WHOIS_PORT"whois"; |
71 | const char *ip_whois[] = { LNICHOST"whois.lacnic.net", RNICHOST"whois.ripe.net", PNICHOST"whois.apnic.net", BNICHOST"whois.registro.br", |
72 | AFNICHOST"whois.afrinic.net", NULL((void *)0) }; |
73 | |
74 | __dead__attribute__((__noreturn__)) void usage(void); |
75 | int whois(const char *, const char *, const char *, int); |
76 | char *choose_server(const char *, const char *, char **); |
77 | |
78 | int |
79 | main(int argc, char *argv[]) |
80 | { |
81 | int ch, flags, rval; |
82 | char *host, *name, *country; |
83 | |
84 | country = host = NULL((void *)0); |
85 | flags = rval = 0; |
86 | while ((ch = getopt(argc, argv, "aAc:dgh:iIlmp:PqQrR")) != -1) |
87 | switch (ch) { |
88 | case 'a': |
89 | host = ANICHOST"whois.arin.net"; |
90 | break; |
91 | case 'A': |
92 | host = PNICHOST"whois.apnic.net"; |
93 | break; |
94 | case 'c': |
95 | country = optarg; |
96 | break; |
97 | case 'd': |
98 | host = DNICHOST"whois.nic.mil"; |
99 | break; |
100 | case 'g': |
101 | host = GNICHOST"whois.nic.gov"; |
102 | break; |
103 | case 'h': |
104 | host = optarg; |
105 | break; |
106 | case 'i': |
107 | host = INICHOST"whois.networksolutions.com"; |
108 | break; |
109 | case 'I': |
110 | host = IANAHOST"whois.iana.org"; |
111 | break; |
112 | case 'l': |
113 | host = LNICHOST"whois.lacnic.net"; |
114 | break; |
115 | case 'm': |
116 | host = MNICHOST"whois.ra.net"; |
117 | break; |
118 | case 'p': |
119 | port_whois = optarg; |
120 | break; |
121 | case 'P': |
122 | host = PDBHOST"whois.peeringdb.com"; |
123 | break; |
124 | case 'q': |
125 | /* deprecated, now the default */ |
126 | break; |
127 | case 'Q': |
128 | flags |= WHOIS_QUICK0x02; |
129 | break; |
130 | case 'r': |
131 | host = RNICHOST"whois.ripe.net"; |
132 | break; |
133 | case 'R': |
134 | host = RUNICHOST"whois.ripn.net"; |
135 | break; |
136 | default: |
137 | usage(); |
138 | } |
139 | argc -= optind; |
140 | argv += optind; |
141 | |
142 | if (!argc || (country != NULL((void *)0) && host != NULL((void *)0))) |
143 | usage(); |
144 | |
145 | if (pledge("stdio dns inet", NULL((void *)0)) == -1) |
146 | err(1, "pledge"); |
147 | |
148 | if (host == NULL((void *)0) && country == NULL((void *)0) && !(flags & WHOIS_QUICK0x02)) |
149 | flags |= WHOIS_RECURSE0x01; |
150 | for (name = *argv; (name = *argv) != NULL((void *)0); argv++) { |
Value stored to 'name' is never read | |
151 | char *tofree = NULL((void *)0); |
152 | const char *server = |
153 | host ? host : choose_server(name, country, &tofree); |
154 | rval += whois(name, server, port_whois, flags); |
155 | free(tofree); |
156 | } |
157 | return (rval); |
158 | } |
159 | |
160 | int |
161 | whois(const char *query, const char *server, const char *port, int flags) |
162 | { |
163 | FILE *fp; |
164 | char *buf, *p, *nhost, *nbuf = NULL((void *)0); |
165 | size_t len; |
166 | int i, s, error; |
167 | const char *reason = NULL((void *)0), *fmt; |
168 | struct addrinfo hints, *res, *ai; |
169 | |
170 | memset(&hints, 0, sizeof(hints)); |
171 | hints.ai_flags = 0; |
172 | hints.ai_family = AF_UNSPEC0; |
173 | hints.ai_socktype = SOCK_STREAM1; |
174 | error = getaddrinfo(server, port, &hints, &res); |
175 | if (error) { |
176 | if (error == EAI_SERVICE-8) |
177 | warnx("%s: bad port", port); |
178 | else |
179 | warnx("%s: %s", server, gai_strerror(error)); |
180 | return (1); |
181 | } |
182 | |
183 | for (s = -1, ai = res; ai != NULL((void *)0); ai = ai->ai_next) { |
184 | s = socket(ai->ai_family, ai->ai_socktype, ai->ai_protocol); |
185 | if (s == -1) { |
186 | error = errno(*__errno()); |
187 | reason = "socket"; |
188 | continue; |
189 | } |
190 | if (connect(s, ai->ai_addr, ai->ai_addrlen) == -1) { |
191 | error = errno(*__errno()); |
192 | reason = "connect"; |
193 | close(s); |
194 | s = -1; |
195 | continue; |
196 | } |
197 | break; /*okay*/ |
198 | } |
199 | freeaddrinfo(res); |
200 | if (s == -1) { |
201 | if (reason) { |
202 | errno(*__errno()) = error; |
203 | warn("%s: %s", server, reason); |
204 | } else |
205 | warn("unknown error in connection attempt"); |
206 | return (1); |
207 | } |
208 | |
209 | if (strcmp(server, "whois.denic.de") == 0 || |
210 | strcmp(server, "de" QNICHOST_TAIL".whois-servers.net") == 0) |
211 | fmt = "-T dn,ace -C ISO-8859-1 %s\r\n"; |
212 | else if (strcmp(server, "whois.dk-hostmaster.dk") == 0 || |
213 | strcmp(server, "dk" QNICHOST_TAIL".whois-servers.net") == 0) |
214 | fmt = "--show-handles %s\r\n"; |
215 | else |
216 | fmt = "%s\r\n"; |
217 | |
218 | fp = fdopen(s, "r+"); |
219 | if (fp == NULL((void *)0)) |
220 | err(1, "fdopen"); |
221 | fprintf(fp, fmt, query); |
222 | fflush(fp); |
223 | nhost = NULL((void *)0); |
224 | while ((buf = fgetln(fp, &len)) != NULL((void *)0)) { |
225 | p = buf + len - 1; |
226 | if (isspace((unsigned char)*p)) { |
227 | do |
228 | *p = '\0'; |
229 | while (p > buf && isspace((unsigned char)*--p)); |
230 | } else { |
231 | if ((nbuf = malloc(len + 1)) == NULL((void *)0)) |
232 | err(1, "malloc"); |
233 | memcpy(nbuf, buf, len); |
234 | nbuf[len] = '\0'; |
235 | buf = nbuf; |
236 | } |
237 | puts(buf); |
238 | |
239 | if (nhost != NULL((void *)0) || !(flags & WHOIS_RECURSE0x01)) |
240 | continue; |
241 | |
242 | if ((p = strstr(buf, WHOIS_SERVER_ID"Registrar WHOIS Server:"))) { |
243 | p += sizeof(WHOIS_SERVER_ID"Registrar WHOIS Server:") - 1; |
244 | while (isblank((unsigned char)*p)) |
245 | p++; |
246 | if ((len = strcspn(p, " \t\n\r"))) { |
247 | if ((nhost = malloc(len + 1)) == NULL((void *)0)) |
248 | err(1, "malloc"); |
249 | memcpy(nhost, p, len); |
250 | nhost[len] = '\0'; |
251 | } |
252 | } else if (strcmp(server, ANICHOST"whois.arin.net") == 0) { |
253 | for (p = buf; *p != '\0'; p++) |
254 | *p = tolower((unsigned char)*p); |
255 | for (i = 0; ip_whois[i] != NULL((void *)0); i++) { |
256 | if (strstr(buf, ip_whois[i]) != NULL((void *)0)) { |
257 | nhost = strdup(ip_whois[i]); |
258 | if (nhost == NULL((void *)0)) |
259 | err(1, "strdup"); |
260 | break; |
261 | } |
262 | } |
263 | } |
264 | } |
265 | fclose(fp); |
266 | free(nbuf); |
267 | |
268 | if (nhost != NULL((void *)0)) { |
269 | error = whois(query, nhost, port, 0); |
270 | free(nhost); |
271 | } |
272 | |
273 | return (error); |
274 | } |
275 | |
276 | /* |
277 | * If no country is specified determine the top level domain from the query. |
278 | * If the TLD is a number, query ARIN, otherwise, use TLD.whois-server.net. |
279 | * If the domain does not contain '.', check to see if it is an NSI handle |
280 | * (starts with '!') or a CORE handle (COCO-[0-9]+ or COHO-[0-9]+) or an |
281 | * ASN (starts with AS) or IPv6 address (contains ':'). Fall back to |
282 | * NICHOST for the non-handle and non-IPv6 case. |
283 | */ |
284 | char * |
285 | choose_server(const char *name, const char *country, char **tofree) |
286 | { |
287 | char *server; |
288 | const char *qhead; |
289 | char *ep; |
290 | struct addrinfo hints, *res = NULL((void *)0); |
291 | |
292 | memset(&hints, 0, sizeof(hints)); |
293 | hints.ai_flags = 0; |
294 | hints.ai_family = AF_UNSPEC0; |
295 | hints.ai_socktype = SOCK_STREAM1; |
296 | |
297 | if (country != NULL((void *)0)) |
298 | qhead = country; |
299 | else if ((qhead = strrchr(name, '.')) == NULL((void *)0)) { |
300 | if (*name == '!') |
301 | return (INICHOST"whois.networksolutions.com"); |
302 | else if ((strncasecmp(name, "COCO-", 5) == 0 || |
303 | strncasecmp(name, "COHO-", 5) == 0) && |
304 | strtol(name + 5, &ep, 10) > 0 && *ep == '\0') |
305 | return (CNICHOST"whois.corenic.net"); |
306 | else if ((strncasecmp(name, "AS", 2) == 0) && |
307 | strtol(name + 2, &ep, 10) > 0 && *ep == '\0') |
308 | return (MNICHOST"whois.ra.net"); |
309 | else if (strchr(name, ':') != NULL((void *)0)) /* IPv6 address */ |
310 | return (ANICHOST"whois.arin.net"); |
311 | else |
312 | return (NICHOST"whois.crsnic.net"); |
313 | } else if (isdigit((unsigned char)*(++qhead))) |
314 | return (ANICHOST"whois.arin.net"); |
315 | |
316 | /* |
317 | * Post-2003 ("new") gTLDs are all supposed to have "whois.nic.domain" |
318 | * (per registry agreement), some older gTLDs also support this... |
319 | */ |
320 | if (asprintf(&server, "whois.nic.%s", qhead) == -1) |
321 | err(1, NULL((void *)0)); |
322 | |
323 | /* most ccTLDs don't do this, but QNICHOST/whois-servers mostly works */ |
324 | if ((strlen(qhead) == 2 || |
325 | /* and is required for most of the <=2003 TLDs/gTLDs */ |
326 | strcasecmp(qhead, "org") == 0 || |
327 | strcasecmp(qhead, "com") == 0 || |
328 | strcasecmp(qhead, "net") == 0 || |
329 | strcasecmp(qhead, "cat") == 0 || |
330 | strcasecmp(qhead, "pro") == 0 || |
331 | strcasecmp(qhead, "info") == 0 || |
332 | strcasecmp(qhead, "aero") == 0 || |
333 | strcasecmp(qhead, "jobs") == 0 || |
334 | strcasecmp(qhead, "mobi") == 0 || |
335 | strcasecmp(qhead, "museum") == 0 || |
336 | /* for others, if whois.nic.TLD doesn't exist, try whois-servers */ |
337 | getaddrinfo(server, NULL((void *)0), &hints, &res) != 0)) { |
338 | free(server); |
339 | if (asprintf(&server, "%s%s", qhead, QNICHOST_TAIL".whois-servers.net") == -1) |
340 | err(1, NULL((void *)0)); |
341 | } |
342 | if (res != NULL((void *)0)) |
343 | freeaddrinfo(res); |
344 | |
345 | *tofree = server; |
346 | return (server); |
347 | } |
348 | |
349 | __dead__attribute__((__noreturn__)) void |
350 | usage(void) |
351 | { |
352 | extern char *__progname; |
353 | |
354 | fprintf(stderr(&__sF[2]), |
355 | "usage: %s [-AadgIilmPQRr] [-c country-code | -h host] " |
356 | "[-p port] name ...\n", __progname); |
357 | exit(1); |
358 | } |