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192.168.1.100 / T106_DC / d546008db7a151569ec4942069160aa1846278a2 / . / ap / app / c-ares / src / acountry.c
blob: aea22c81aafc3aebf8a95482206b4da127d7d2df [file] [log] [blame]
lh9ed821d2023-04-07 01:36:19 -0700[diff] [blame]1/*
2 *
3 * IP-address/hostname to country converter.
4 *
5 * Problem; you want to know where IP a.b.c.d is located.
6 *
7 * Use ares_gethostbyname ("d.c.b.a.zz.countries.nerd.dk")
8 * and get the CNAME (host->h_name). Result will be:
9 * CNAME = zz<CC>.countries.nerd.dk with address 127.0.x.y (ver 1) or
10 * CNAME = <a.b.c.d>.zz.countries.nerd.dk with address 127.0.x.y (ver 2)
11 *
12 * The 2 letter country code is in <CC> and the ISO-3166 country
13 * number is in x.y (number = x*256 + y). Version 2 of the protocol is missing
14 * the <CC> number.
15 *
16 * Ref: http://countries.nerd.dk/more.html
17 *
18 * Written by G. Vanem <gvanem@yahoo.no> 2006, 2007
19 *
20 * NB! This program may not be big-endian aware.
21 *
22 * Permission to use, copy, modify, and distribute this
23 * software and its documentation for any purpose and without
24 * fee is hereby granted, provided that the above copyright
25 * notice appear in all copies and that both that copyright
26 * notice and this permission notice appear in supporting
27 * documentation, and that the name of M.I.T. not be used in
28 * advertising or publicity pertaining to distribution of the
29 * software without specific, written prior permission.
30 * M.I.T. makes no representations about the suitability of
31 * this software for any purpose. It is provided "as is"
32 * without express or implied warranty.
33 */
34
35#include "ares_setup.h"
36
37#ifdef HAVE_STRINGS_H
38#include <strings.h>
39#endif
40
41#if defined(WIN32) && !defined(WATT32)
42 #include <winsock.h>
43#else
44 #include <arpa/inet.h>
45 #include <netinet/in.h>
46 #include <netdb.h>
47#endif
48
49#include "ares.h"
50#include "ares_getopt.h"
51#include "ares_nowarn.h"
52
53#ifndef HAVE_STRDUP
54# include "ares_strdup.h"
55# define strdup(ptr) ares_strdup(ptr)
56#endif
57
58#ifndef HAVE_STRCASECMP
59# include "ares_strcasecmp.h"
60# define strcasecmp(p1,p2) ares_strcasecmp(p1,p2)
61#endif
62
63#ifndef HAVE_STRNCASECMP
64# include "ares_strcasecmp.h"
65# define strncasecmp(p1,p2,n) ares_strncasecmp(p1,p2,n)
66#endif
67
68#ifndef INADDR_NONE
69#define INADDR_NONE 0xffffffff
70#endif
71
72static const char *usage = "acountry [-vh?] {host|addr} ...\n";
73static const char nerd_fmt[] = "%u.%u.%u.%u.zz.countries.nerd.dk";
74static const char *nerd_ver1 = nerd_fmt + 14; /* .countries.nerd.dk */
75static const char *nerd_ver2 = nerd_fmt + 11; /* .zz.countries.nerd.dk */
76static int verbose = 0;
77
78#define TRACE(fmt) do { \
79 if (verbose > 0) \
80 printf fmt ; \
81 } WHILE_FALSE
82
83static void wait_ares(ares_channel channel);
84static void callback(void *arg, int status, int timeouts, struct hostent *host);
85static void callback2(void *arg, int status, int timeouts, struct hostent *host);
86static void find_country_from_cname(const char *cname, struct in_addr addr);
87
88static void Abort(const char *fmt, ...)
89{
90 va_list args;
91 va_start(args, fmt);
92 vfprintf(stderr, fmt, args);
93 va_end(args);
94 exit(1);
95}
96
97int main(int argc, char **argv)
98{
99 ares_channel channel;
100 int ch, status;
101
102#if defined(WIN32) && !defined(WATT32)
103 WORD wVersionRequested = MAKEWORD(USE_WINSOCK,USE_WINSOCK);
104 WSADATA wsaData;
105 WSAStartup(wVersionRequested, &wsaData);
106#endif
107
108 status = ares_library_init(ARES_LIB_INIT_ALL);
109 if (status != ARES_SUCCESS)
110 {
111 fprintf(stderr, "ares_library_init: %s\n", ares_strerror(status));
112 return 1;
113 }
114
115 while ((ch = ares_getopt(argc, argv, "dvh?")) != -1)
116 switch (ch)
117 {
118 case 'd':
119#ifdef WATT32
120 dbug_init();
121#endif
122 break;
123 case 'v':
124 verbose++;
125 break;
126 case 'h':
127 case '?':
128 default:
129 Abort(usage);
130 }
131
132 argc -= optind;
133 argv += optind;
134 if (argc < 1)
135 Abort(usage);
136
137 status = ares_init(&channel);
138 if (status != ARES_SUCCESS)
139 {
140 fprintf(stderr, "ares_init: %s\n", ares_strerror(status));
141 return 1;
142 }
143
144 /* Initiate the queries, one per command-line argument. */
145 for ( ; *argv; argv++)
146 {
147 struct in_addr addr;
148 char buf[100];
149
150 /* If this fails, assume '*argv' is a host-name that
151 * must be resolved first
152 */
153 if (ares_inet_pton(AF_INET, *argv, &addr) != 1)
154 {
155 ares_gethostbyname(channel, *argv, AF_INET, callback2, &addr);
156 wait_ares(channel);
157 if (addr.s_addr == INADDR_NONE)
158 {
159 printf("Failed to lookup %s\n", *argv);
160 continue;
161 }
162 }
163
164 sprintf(buf, nerd_fmt,
165 (unsigned int)(addr.s_addr >> 24),
166 (unsigned int)((addr.s_addr >> 16) & 255),
167 (unsigned int)((addr.s_addr >> 8) & 255),
168 (unsigned int)(addr.s_addr & 255));
169 TRACE(("Looking up %s...", buf));
170 fflush(stdout);
171 ares_gethostbyname(channel, buf, AF_INET, callback, buf);
172 }
173
174 wait_ares(channel);
175 ares_destroy(channel);
176
177 ares_library_cleanup();
178
179#if defined(WIN32) && !defined(WATT32)
180 WSACleanup();
181#endif
182
183 return 0;
184}
185
186/*
187 * Wait for the queries to complete.
188 */
189static void wait_ares(ares_channel channel)
190{
191 for (;;)
192 {
193 struct timeval *tvp, tv;
194 fd_set read_fds, write_fds;
195 int nfds;
196
197 FD_ZERO(&read_fds);
198 FD_ZERO(&write_fds);
199 nfds = ares_fds(channel, &read_fds, &write_fds);
200 if (nfds == 0)
201 break;
202 tvp = ares_timeout(channel, NULL, &tv);
203 nfds = select(nfds, &read_fds, &write_fds, NULL, tvp);
204 if (nfds < 0)
205 continue;
206 ares_process(channel, &read_fds, &write_fds);
207 }
208}
209
210/*
211 * This is the callback used when we have the IP-address of interest.
212 * Extract the CNAME and figure out the country-code from it.
213 */
214static void callback(void *arg, int status, int timeouts, struct hostent *host)
215{
216 const char *name = (const char*)arg;
217 const char *cname;
218 char buf[20];
219
220 (void)timeouts;
221
222 if (!host || status != ARES_SUCCESS)
223 {
224 printf("Failed to lookup %s: %s\n", name, ares_strerror(status));
225 return;
226 }
227
228 TRACE(("\nFound address %s, name %s\n",
229 ares_inet_ntop(AF_INET,(const char*)host->h_addr,buf,sizeof(buf)),
230 host->h_name));
231
232 cname = host->h_name; /* CNAME gets put here */
233 if (!cname)
234 printf("Failed to get CNAME for %s\n", name);
235 else
236 find_country_from_cname(cname, *(struct in_addr*)host->h_addr);
237}
238
239/*
240 * This is the callback used to obtain the IP-address of the host of interest.
241 */
242static void callback2(void *arg, int status, int timeouts, struct hostent *host)
243{
244 struct in_addr *addr = (struct in_addr*) arg;
245
246 (void)timeouts;
247 if (!host || status != ARES_SUCCESS)
248 memset(addr, INADDR_NONE, sizeof(*addr));
249 else
250 memcpy(addr, host->h_addr, sizeof(*addr));
251}
252
253struct search_list {
254 int country_number; /* ISO-3166 country number */
255 char short_name[3]; /* A2 short country code */
256 const char *long_name; /* normal country name */
257 };
258
259static const struct search_list *list_lookup(int number, const struct search_list *list, int num)
260{
261 while (num > 0 && list->long_name)
262 {
263 if (list->country_number == number)
264 return (list);
265 num--;
266 list++;
267 }
268 return (NULL);
269}
270
271/*
272 * Ref: ftp://ftp.ripe.net/iso3166-countrycodes.txt
273 */
274static const struct search_list country_list[] = {
275 { 4, "af", "Afghanistan" },
276 { 248, "ax", "Åland Island" },
277 { 8, "al", "Albania" },
278 { 12, "dz", "Algeria" },
279 { 16, "as", "American Samoa" },
280 { 20, "ad", "Andorra" },
281 { 24, "ao", "Angola" },
282 { 660, "ai", "Anguilla" },
283 { 10, "aq", "Antarctica" },
284 { 28, "ag", "Antigua & Barbuda" },
285 { 32, "ar", "Argentina" },
286 { 51, "am", "Armenia" },
287 { 533, "aw", "Aruba" },
288 { 36, "au", "Australia" },
289 { 40, "at", "Austria" },
290 { 31, "az", "Azerbaijan" },
291 { 44, "bs", "Bahamas" },
292 { 48, "bh", "Bahrain" },
293 { 50, "bd", "Bangladesh" },
294 { 52, "bb", "Barbados" },
295 { 112, "by", "Belarus" },
296 { 56, "be", "Belgium" },
297 { 84, "bz", "Belize" },
298 { 204, "bj", "Benin" },
299 { 60, "bm", "Bermuda" },
300 { 64, "bt", "Bhutan" },
301 { 68, "bo", "Bolivia" },
302 { 70, "ba", "Bosnia & Herzegowina" },
303 { 72, "bw", "Botswana" },
304 { 74, "bv", "Bouvet Island" },
305 { 76, "br", "Brazil" },
306 { 86, "io", "British Indian Ocean Territory" },
307 { 96, "bn", "Brunei Darussalam" },
308 { 100, "bg", "Bulgaria" },
309 { 854, "bf", "Burkina Faso" },
310 { 108, "bi", "Burundi" },
311 { 116, "kh", "Cambodia" },
312 { 120, "cm", "Cameroon" },
313 { 124, "ca", "Canada" },
314 { 132, "cv", "Cape Verde" },
315 { 136, "ky", "Cayman Islands" },
316 { 140, "cf", "Central African Republic" },
317 { 148, "td", "Chad" },
318 { 152, "cl", "Chile" },
319 { 156, "cn", "China" },
320 { 162, "cx", "Christmas Island" },
321 { 166, "cc", "Cocos Islands" },
322 { 170, "co", "Colombia" },
323 { 174, "km", "Comoros" },
324 { 178, "cg", "Congo" },
325 { 180, "cd", "Congo" },
326 { 184, "ck", "Cook Islands" },
327 { 188, "cr", "Costa Rica" },
328 { 384, "ci", "Cote d'Ivoire" },
329 { 191, "hr", "Croatia" },
330 { 192, "cu", "Cuba" },
331 { 196, "cy", "Cyprus" },
332 { 203, "cz", "Czech Republic" },
333 { 208, "dk", "Denmark" },
334 { 262, "dj", "Djibouti" },
335 { 212, "dm", "Dominica" },
336 { 214, "do", "Dominican Republic" },
337 { 218, "ec", "Ecuador" },
338 { 818, "eg", "Egypt" },
339 { 222, "sv", "El Salvador" },
340 { 226, "gq", "Equatorial Guinea" },
341 { 232, "er", "Eritrea" },
342 { 233, "ee", "Estonia" },
343 { 231, "et", "Ethiopia" },
344 { 238, "fk", "Falkland Islands" },
345 { 234, "fo", "Faroe Islands" },
346 { 242, "fj", "Fiji" },
347 { 246, "fi", "Finland" },
348 { 250, "fr", "France" },
349 { 249, "fx", "France, Metropolitan" },
350 { 254, "gf", "French Guiana" },
351 { 258, "pf", "French Polynesia" },
352 { 260, "tf", "French Southern Territories" },
353 { 266, "ga", "Gabon" },
354 { 270, "gm", "Gambia" },
355 { 268, "ge", "Georgia" },
356 { 276, "de", "Germany" },
357 { 288, "gh", "Ghana" },
358 { 292, "gi", "Gibraltar" },
359 { 300, "gr", "Greece" },
360 { 304, "gl", "Greenland" },
361 { 308, "gd", "Grenada" },
362 { 312, "gp", "Guadeloupe" },
363 { 316, "gu", "Guam" },
364 { 320, "gt", "Guatemala" },
365 { 324, "gn", "Guinea" },
366 { 624, "gw", "Guinea-Bissau" },
367 { 328, "gy", "Guyana" },
368 { 332, "ht", "Haiti" },
369 { 334, "hm", "Heard & Mc Donald Islands" },
370 { 336, "va", "Vatican City" },
371 { 340, "hn", "Honduras" },
372 { 344, "hk", "Hong kong" },
373 { 348, "hu", "Hungary" },
374 { 352, "is", "Iceland" },
375 { 356, "in", "India" },
376 { 360, "id", "Indonesia" },
377 { 364, "ir", "Iran" },
378 { 368, "iq", "Iraq" },
379 { 372, "ie", "Ireland" },
380 { 376, "il", "Israel" },
381 { 380, "it", "Italy" },
382 { 388, "jm", "Jamaica" },
383 { 392, "jp", "Japan" },
384 { 400, "jo", "Jordan" },
385 { 398, "kz", "Kazakhstan" },
386 { 404, "ke", "Kenya" },
387 { 296, "ki", "Kiribati" },
388 { 408, "kp", "Korea (north)" },
389 { 410, "kr", "Korea (south)" },
390 { 414, "kw", "Kuwait" },
391 { 417, "kg", "Kyrgyzstan" },
392 { 418, "la", "Laos" },
393 { 428, "lv", "Latvia" },
394 { 422, "lb", "Lebanon" },
395 { 426, "ls", "Lesotho" },
396 { 430, "lr", "Liberia" },
397 { 434, "ly", "Libya" },
398 { 438, "li", "Liechtenstein" },
399 { 440, "lt", "Lithuania" },
400 { 442, "lu", "Luxembourg" },
401 { 446, "mo", "Macao" },
402 { 807, "mk", "Macedonia" },
403 { 450, "mg", "Madagascar" },
404 { 454, "mw", "Malawi" },
405 { 458, "my", "Malaysia" },
406 { 462, "mv", "Maldives" },
407 { 466, "ml", "Mali" },
408 { 470, "mt", "Malta" },
409 { 584, "mh", "Marshall Islands" },
410 { 474, "mq", "Martinique" },
411 { 478, "mr", "Mauritania" },
412 { 480, "mu", "Mauritius" },
413 { 175, "yt", "Mayotte" },
414 { 484, "mx", "Mexico" },
415 { 583, "fm", "Micronesia" },
416 { 498, "md", "Moldova" },
417 { 492, "mc", "Monaco" },
418 { 496, "mn", "Mongolia" },
419 { 500, "ms", "Montserrat" },
420 { 504, "ma", "Morocco" },
421 { 508, "mz", "Mozambique" },
422 { 104, "mm", "Myanmar" },
423 { 516, "na", "Namibia" },
424 { 520, "nr", "Nauru" },
425 { 524, "np", "Nepal" },
426 { 528, "nl", "Netherlands" },
427 { 530, "an", "Netherlands Antilles" },
428 { 540, "nc", "New Caledonia" },
429 { 554, "nz", "New Zealand" },
430 { 558, "ni", "Nicaragua" },
431 { 562, "ne", "Niger" },
432 { 566, "ng", "Nigeria" },
433 { 570, "nu", "Niue" },
434 { 574, "nf", "Norfolk Island" },
435 { 580, "mp", "Northern Mariana Islands" },
436 { 578, "no", "Norway" },
437 { 512, "om", "Oman" },
438 { 586, "pk", "Pakistan" },
439 { 585, "pw", "Palau" },
440 { 275, "ps", "Palestinian Territory" },
441 { 591, "pa", "Panama" },
442 { 598, "pg", "Papua New Guinea" },
443 { 600, "py", "Paraguay" },
444 { 604, "pe", "Peru" },
445 { 608, "ph", "Philippines" },
446 { 612, "pn", "Pitcairn" },
447 { 616, "pl", "Poland" },
448 { 620, "pt", "Portugal" },
449 { 630, "pr", "Puerto Rico" },
450 { 634, "qa", "Qatar" },
451 { 638, "re", "Reunion" },
452 { 642, "ro", "Romania" },
453 { 643, "ru", "Russia" },
454 { 646, "rw", "Rwanda" },
455 { 659, "kn", "Saint Kitts & Nevis" },
456 { 662, "lc", "Saint Lucia" },
457 { 670, "vc", "Saint Vincent" },
458 { 882, "ws", "Samoa" },
459 { 674, "sm", "San Marino" },
460 { 678, "st", "Sao Tome & Principe" },
461 { 682, "sa", "Saudi Arabia" },
462 { 686, "sn", "Senegal" },
463 { 891, "cs", "Serbia and Montenegro" },
464 { 690, "sc", "Seychelles" },
465 { 694, "sl", "Sierra Leone" },
466 { 702, "sg", "Singapore" },
467 { 703, "sk", "Slovakia" },
468 { 705, "si", "Slovenia" },
469 { 90, "sb", "Solomon Islands" },
470 { 706, "so", "Somalia" },
471 { 710, "za", "South Africa" },
472 { 239, "gs", "South Georgia" },
473 { 724, "es", "Spain" },
474 { 144, "lk", "Sri Lanka" },
475 { 654, "sh", "St. Helena" },
476 { 666, "pm", "St. Pierre & Miquelon" },
477 { 736, "sd", "Sudan" },
478 { 740, "sr", "Suriname" },
479 { 744, "sj", "Svalbard & Jan Mayen Islands" },
480 { 748, "sz", "Swaziland" },
481 { 752, "se", "Sweden" },
482 { 756, "ch", "Switzerland" },
483 { 760, "sy", "Syrian Arab Republic" },
484 { 626, "tl", "Timor-Leste" },
485 { 158, "tw", "Taiwan" },
486 { 762, "tj", "Tajikistan" },
487 { 834, "tz", "Tanzania" },
488 { 764, "th", "Thailand" },
489 { 768, "tg", "Togo" },
490 { 772, "tk", "Tokelau" },
491 { 776, "to", "Tonga" },
492 { 780, "tt", "Trinidad & Tobago" },
493 { 788, "tn", "Tunisia" },
494 { 792, "tr", "Turkey" },
495 { 795, "tm", "Turkmenistan" },
496 { 796, "tc", "Turks & Caicos Islands" },
497 { 798, "tv", "Tuvalu" },
498 { 800, "ug", "Uganda" },
499 { 804, "ua", "Ukraine" },
500 { 784, "ae", "United Arab Emirates" },
501 { 826, "gb", "United Kingdom" },
502 { 840, "us", "United States" },
503 { 581, "um", "United States Minor Outlying Islands" },
504 { 858, "uy", "Uruguay" },
505 { 860, "uz", "Uzbekistan" },
506 { 548, "vu", "Vanuatu" },
507 { 862, "ve", "Venezuela" },
508 { 704, "vn", "Vietnam" },
509 { 92, "vg", "Virgin Islands (British)" },
510 { 850, "vi", "Virgin Islands (US)" },
511 { 876, "wf", "Wallis & Futuna Islands" },
512 { 732, "eh", "Western Sahara" },
513 { 887, "ye", "Yemen" },
514 { 894, "zm", "Zambia" },
515 { 716, "zw", "Zimbabwe" }
516 };
517
518/*
519 * Check if start of 'str' is simply an IPv4 address.
520 */
521#define BYTE_OK(x) ((x) >= 0 && (x) <= 255)
522
523static int is_addr(char *str, char **end)
524{
525 int a0, a1, a2, a3, num, rc = 0, length = 0;
526
527 num = sscanf(str,"%3d.%3d.%3d.%3d%n",&a0,&a1,&a2,&a3,&length);
528 if( (num == 4) &&
529 BYTE_OK(a0) && BYTE_OK(a1) && BYTE_OK(a2) && BYTE_OK(a3) &&
530 length >= (3+4))
531 {
532 rc = 1;
533 *end = str + length;
534 }
535 return rc;
536}
537
538/*
539 * Find the country-code and name from the CNAME. E.g.:
540 * version 1: CNAME = zzno.countries.nerd.dk with address 127.0.2.66
541 * yields ccode_A" = "no" and cnumber 578 (2.66).
542 * version 2: CNAME = <a.b.c.d>.zz.countries.nerd.dk with address 127.0.2.66
543 * yields cnumber 578 (2.66). ccode_A is "";
544 */
545static void find_country_from_cname(const char *cname, struct in_addr addr)
546{
547 const struct search_list *country;
548 char ccode_A2[3], *ccopy, *dot_4;
549 int cnumber, z0, z1, ver_1, ver_2;
550 unsigned long ip;
551
552 ip = ntohl(addr.s_addr);
553 z0 = TOLOWER(cname[0]);
554 z1 = TOLOWER(cname[1]);
555 ccopy = strdup(cname);
556 dot_4 = NULL;
557
558 ver_1 = (z0 == 'z' && z1 == 'z' && !strcasecmp(cname+4,nerd_ver1));
559 ver_2 = (is_addr(ccopy,&dot_4) && !strcasecmp(dot_4,nerd_ver2));
560
561 if (ver_1)
562 {
563 const char *dot = strchr(cname, '.');
564 if (dot != cname+4)
565 {
566 printf("Unexpected CNAME %s (ver_1)\n", cname);
567 free(ccopy);
568 return;
569 }
570 }
571 else if (ver_2)
572 {
573 z0 = TOLOWER(dot_4[1]);
574 z1 = TOLOWER(dot_4[2]);
575 if (z0 != 'z' && z1 != 'z')
576 {
577 printf("Unexpected CNAME %s (ver_2)\n", cname);
578 free(ccopy);
579 return;
580 }
581 }
582 else
583 {
584 printf("Unexpected CNAME %s (ver?)\n", cname);
585 free(ccopy);
586 return;
587 }
588
589 if (ver_1)
590 {
591 ccode_A2[0] = (char)TOLOWER(cname[2]);
592 ccode_A2[1] = (char)TOLOWER(cname[3]);
593 ccode_A2[2] = '\0';
594 }
595 else
596 ccode_A2[0] = '\0';
597
598 cnumber = ip & 0xFFFF;
599
600 TRACE(("Found country-code `%s', number %d\n",
601 ver_1 ? ccode_A2 : "<n/a>", cnumber));
602
603 country = list_lookup(cnumber, country_list,
604 sizeof(country_list) / sizeof(country_list[0]));
605 if (!country)
606 printf("Name for country-number %d not found.\n", cnumber);
607 else
608 {
609 if (ver_1)
610 {
611 if ((country->short_name[0] != ccode_A2[0]) ||
612 (country->short_name[1] != ccode_A2[1]) ||
613 (country->short_name[2] != ccode_A2[2]))
614 printf("short-name mismatch; %s vs %s\n",
615 country->short_name, ccode_A2);
616 }
617 printf("%s (%s), number %d.\n",
618 country->long_name, country->short_name, cnumber);
619 }
620 free(ccopy);
621}