diff options
Diffstat (limited to 'src/c-ares/acountry.c')
| -rw-r--r-- | src/c-ares/acountry.c | 621 |
1 files changed, 621 insertions, 0 deletions
diff --git a/src/c-ares/acountry.c b/src/c-ares/acountry.c new file mode 100644 index 000000000..aea22c81a --- /dev/null +++ b/src/c-ares/acountry.c @@ -0,0 +1,621 @@ +/* + * + * IP-address/hostname to country converter. + * + * Problem; you want to know where IP a.b.c.d is located. + * + * Use ares_gethostbyname ("d.c.b.a.zz.countries.nerd.dk") + * and get the CNAME (host->h_name). Result will be: + * CNAME = zz<CC>.countries.nerd.dk with address 127.0.x.y (ver 1) or + * CNAME = <a.b.c.d>.zz.countries.nerd.dk with address 127.0.x.y (ver 2) + * + * The 2 letter country code is in <CC> and the ISO-3166 country + * number is in x.y (number = x*256 + y). Version 2 of the protocol is missing + * the <CC> number. + * + * Ref: http://countries.nerd.dk/more.html + * + * Written by G. Vanem <gvanem@yahoo.no> 2006, 2007 + * + * NB! This program may not be big-endian aware. + * + * Permission to use, copy, modify, and distribute this + * software and its documentation for any purpose and without + * fee is hereby granted, provided that the above copyright + * notice appear in all copies and that both that copyright + * notice and this permission notice appear in supporting + * documentation, and that the name of M.I.T. not be used in + * advertising or publicity pertaining to distribution of the + * software without specific, written prior permission. + * M.I.T. makes no representations about the suitability of + * this software for any purpose. It is provided "as is" + * without express or implied warranty. + */ + +#include "ares_setup.h" + +#ifdef HAVE_STRINGS_H +#include <strings.h> +#endif + +#if defined(WIN32) && !defined(WATT32) + #include <winsock.h> +#else + #include <arpa/inet.h> + #include <netinet/in.h> + #include <netdb.h> +#endif + +#include "ares.h" +#include "ares_getopt.h" +#include "ares_nowarn.h" + +#ifndef HAVE_STRDUP +# include "ares_strdup.h" +# define strdup(ptr) ares_strdup(ptr) +#endif + +#ifndef HAVE_STRCASECMP +# include "ares_strcasecmp.h" +# define strcasecmp(p1,p2) ares_strcasecmp(p1,p2) +#endif + +#ifndef HAVE_STRNCASECMP +# include "ares_strcasecmp.h" +# define strncasecmp(p1,p2,n) ares_strncasecmp(p1,p2,n) +#endif + +#ifndef INADDR_NONE +#define INADDR_NONE 0xffffffff +#endif + +static const char *usage = "acountry [-vh?] {host|addr} ...\n"; +static const char nerd_fmt[] = "%u.%u.%u.%u.zz.countries.nerd.dk"; +static const char *nerd_ver1 = nerd_fmt + 14; /* .countries.nerd.dk */ +static const char *nerd_ver2 = nerd_fmt + 11; /* .zz.countries.nerd.dk */ +static int verbose = 0; + +#define TRACE(fmt) do { \ + if (verbose > 0) \ + printf fmt ; \ + } WHILE_FALSE + +static void wait_ares(ares_channel channel); +static void callback(void *arg, int status, int timeouts, struct hostent *host); +static void callback2(void *arg, int status, int timeouts, struct hostent *host); +static void find_country_from_cname(const char *cname, struct in_addr addr); + +static void Abort(const char *fmt, ...) +{ + va_list args; + va_start(args, fmt); + vfprintf(stderr, fmt, args); + va_end(args); + exit(1); +} + +int main(int argc, char **argv) +{ + ares_channel channel; + int ch, status; + +#if defined(WIN32) && !defined(WATT32) + WORD wVersionRequested = MAKEWORD(USE_WINSOCK,USE_WINSOCK); + WSADATA wsaData; + WSAStartup(wVersionRequested, &wsaData); +#endif + + status = ares_library_init(ARES_LIB_INIT_ALL); + if (status != ARES_SUCCESS) + { + fprintf(stderr, "ares_library_init: %s\n", ares_strerror(status)); + return 1; + } + + while ((ch = ares_getopt(argc, argv, "dvh?")) != -1) + switch (ch) + { + case 'd': +#ifdef WATT32 + dbug_init(); +#endif + break; + case 'v': + verbose++; + break; + case 'h': + case '?': + default: + Abort(usage); + } + + argc -= optind; + argv += optind; + if (argc < 1) + Abort(usage); + + status = ares_init(&channel); + if (status != ARES_SUCCESS) + { + fprintf(stderr, "ares_init: %s\n", ares_strerror(status)); + return 1; + } + + /* Initiate the queries, one per command-line argument. */ + for ( ; *argv; argv++) + { + struct in_addr addr; + char buf[100]; + + /* If this fails, assume '*argv' is a host-name that + * must be resolved first + */ + if (ares_inet_pton(AF_INET, *argv, &addr) != 1) + { + ares_gethostbyname(channel, *argv, AF_INET, callback2, &addr); + wait_ares(channel); + if (addr.s_addr == INADDR_NONE) + { + printf("Failed to lookup %s\n", *argv); + continue; + } + } + + sprintf(buf, nerd_fmt, + (unsigned int)(addr.s_addr >> 24), + (unsigned int)((addr.s_addr >> 16) & 255), + (unsigned int)((addr.s_addr >> 8) & 255), + (unsigned int)(addr.s_addr & 255)); + TRACE(("Looking up %s...", buf)); + fflush(stdout); + ares_gethostbyname(channel, buf, AF_INET, callback, buf); + } + + wait_ares(channel); + ares_destroy(channel); + + ares_library_cleanup(); + +#if defined(WIN32) && !defined(WATT32) + WSACleanup(); +#endif + + return 0; +} + +/* + * Wait for the queries to complete. + */ +static void wait_ares(ares_channel channel) +{ + for (;;) + { + struct timeval *tvp, tv; + fd_set read_fds, write_fds; + int nfds; + + FD_ZERO(&read_fds); + FD_ZERO(&write_fds); + nfds = ares_fds(channel, &read_fds, &write_fds); + if (nfds == 0) + break; + tvp = ares_timeout(channel, NULL, &tv); + nfds = select(nfds, &read_fds, &write_fds, NULL, tvp); + if (nfds < 0) + continue; + ares_process(channel, &read_fds, &write_fds); + } +} + +/* + * This is the callback used when we have the IP-address of interest. + * Extract the CNAME and figure out the country-code from it. + */ +static void callback(void *arg, int status, int timeouts, struct hostent *host) +{ + const char *name = (const char*)arg; + const char *cname; + char buf[20]; + + (void)timeouts; + + if (!host || status != ARES_SUCCESS) + { + printf("Failed to lookup %s: %s\n", name, ares_strerror(status)); + return; + } + + TRACE(("\nFound address %s, name %s\n", + ares_inet_ntop(AF_INET,(const char*)host->h_addr,buf,sizeof(buf)), + host->h_name)); + + cname = host->h_name; /* CNAME gets put here */ + if (!cname) + printf("Failed to get CNAME for %s\n", name); + else + find_country_from_cname(cname, *(struct in_addr*)host->h_addr); +} + +/* + * This is the callback used to obtain the IP-address of the host of interest. + */ +static void callback2(void *arg, int status, int timeouts, struct hostent *host) +{ + struct in_addr *addr = (struct in_addr*) arg; + + (void)timeouts; + if (!host || status != ARES_SUCCESS) + memset(addr, INADDR_NONE, sizeof(*addr)); + else + memcpy(addr, host->h_addr, sizeof(*addr)); +} + +struct search_list { + int country_number; /* ISO-3166 country number */ + char short_name[3]; /* A2 short country code */ + const char *long_name; /* normal country name */ + }; + +static const struct search_list *list_lookup(int number, const struct search_list *list, int num) +{ + while (num > 0 && list->long_name) + { + if (list->country_number == number) + return (list); + num--; + list++; + } + return (NULL); +} + +/* + * Ref: ftp://ftp.ripe.net/iso3166-countrycodes.txt + */ +static const struct search_list country_list[] = { + { 4, "af", "Afghanistan" }, + { 248, "ax", "Åland Island" }, + { 8, "al", "Albania" }, + { 12, "dz", "Algeria" }, + { 16, "as", "American Samoa" }, + { 20, "ad", "Andorra" }, + { 24, "ao", "Angola" }, + { 660, "ai", "Anguilla" }, + { 10, "aq", "Antarctica" }, + { 28, "ag", "Antigua & Barbuda" }, + { 32, "ar", "Argentina" }, + { 51, "am", "Armenia" }, + { 533, "aw", "Aruba" }, + { 36, "au", "Australia" }, + { 40, "at", "Austria" }, + { 31, "az", "Azerbaijan" }, + { 44, "bs", "Bahamas" }, + { 48, "bh", "Bahrain" }, + { 50, "bd", "Bangladesh" }, + { 52, "bb", "Barbados" }, + { 112, "by", "Belarus" }, + { 56, "be", "Belgium" }, + { 84, "bz", "Belize" }, + { 204, "bj", "Benin" }, + { 60, "bm", "Bermuda" }, + { 64, "bt", "Bhutan" }, + { 68, "bo", "Bolivia" }, + { 70, "ba", "Bosnia & Herzegowina" }, + { 72, "bw", "Botswana" }, + { 74, "bv", "Bouvet Island" }, + { 76, "br", "Brazil" }, + { 86, "io", "British Indian Ocean Territory" }, + { 96, "bn", "Brunei Darussalam" }, + { 100, "bg", "Bulgaria" }, + { 854, "bf", "Burkina Faso" }, + { 108, "bi", "Burundi" }, + { 116, "kh", "Cambodia" }, + { 120, "cm", "Cameroon" }, + { 124, "ca", "Canada" }, + { 132, "cv", "Cape Verde" }, + { 136, "ky", "Cayman Islands" }, + { 140, "cf", "Central African Republic" }, + { 148, "td", "Chad" }, + { 152, "cl", "Chile" }, + { 156, "cn", "China" }, + { 162, "cx", "Christmas Island" }, + { 166, "cc", "Cocos Islands" }, + { 170, "co", "Colombia" }, + { 174, "km", "Comoros" }, + { 178, "cg", "Congo" }, + { 180, "cd", "Congo" }, + { 184, "ck", "Cook Islands" }, + { 188, "cr", "Costa Rica" }, + { 384, "ci", "Cote d'Ivoire" }, + { 191, "hr", "Croatia" }, + { 192, "cu", "Cuba" }, + { 196, "cy", "Cyprus" }, + { 203, "cz", "Czech Republic" }, + { 208, "dk", "Denmark" }, + { 262, "dj", "Djibouti" }, + { 212, "dm", "Dominica" }, + { 214, "do", "Dominican Republic" }, + { 218, "ec", "Ecuador" }, + { 818, "eg", "Egypt" }, + { 222, "sv", "El Salvador" }, + { 226, "gq", "Equatorial Guinea" }, + { 232, "er", "Eritrea" }, + { 233, "ee", "Estonia" }, + { 231, "et", "Ethiopia" }, + { 238, "fk", "Falkland Islands" }, + { 234, "fo", "Faroe Islands" }, + { 242, "fj", "Fiji" }, + { 246, "fi", "Finland" }, + { 250, "fr", "France" }, + { 249, "fx", "France, Metropolitan" }, + { 254, "gf", "French Guiana" }, + { 258, "pf", "French Polynesia" }, + { 260, "tf", "French Southern Territories" }, + { 266, "ga", "Gabon" }, + { 270, "gm", "Gambia" }, + { 268, "ge", "Georgia" }, + { 276, "de", "Germany" }, + { 288, "gh", "Ghana" }, + { 292, "gi", "Gibraltar" }, + { 300, "gr", "Greece" }, + { 304, "gl", "Greenland" }, + { 308, "gd", "Grenada" }, + { 312, "gp", "Guadeloupe" }, + { 316, "gu", "Guam" }, + { 320, "gt", "Guatemala" }, + { 324, "gn", "Guinea" }, + { 624, "gw", "Guinea-Bissau" }, + { 328, "gy", "Guyana" }, + { 332, "ht", "Haiti" }, + { 334, "hm", "Heard & Mc Donald Islands" }, + { 336, "va", "Vatican City" }, + { 340, "hn", "Honduras" }, + { 344, "hk", "Hong kong" }, + { 348, "hu", "Hungary" }, + { 352, "is", "Iceland" }, + { 356, "in", "India" }, + { 360, "id", "Indonesia" }, + { 364, "ir", "Iran" }, + { 368, "iq", "Iraq" }, + { 372, "ie", "Ireland" }, + { 376, "il", "Israel" }, + { 380, "it", "Italy" }, + { 388, "jm", "Jamaica" }, + { 392, "jp", "Japan" }, + { 400, "jo", "Jordan" }, + { 398, "kz", "Kazakhstan" }, + { 404, "ke", "Kenya" }, + { 296, "ki", "Kiribati" }, + { 408, "kp", "Korea (north)" }, + { 410, "kr", "Korea (south)" }, + { 414, "kw", "Kuwait" }, + { 417, "kg", "Kyrgyzstan" }, + { 418, "la", "Laos" }, + { 428, "lv", "Latvia" }, + { 422, "lb", "Lebanon" }, + { 426, "ls", "Lesotho" }, + { 430, "lr", "Liberia" }, + { 434, "ly", "Libya" }, + { 438, "li", "Liechtenstein" }, + { 440, "lt", "Lithuania" }, + { 442, "lu", "Luxembourg" }, + { 446, "mo", "Macao" }, + { 807, "mk", "Macedonia" }, + { 450, "mg", "Madagascar" }, + { 454, "mw", "Malawi" }, + { 458, "my", "Malaysia" }, + { 462, "mv", "Maldives" }, + { 466, "ml", "Mali" }, + { 470, "mt", "Malta" }, + { 584, "mh", "Marshall Islands" }, + { 474, "mq", "Martinique" }, + { 478, "mr", "Mauritania" }, + { 480, "mu", "Mauritius" }, + { 175, "yt", "Mayotte" }, + { 484, "mx", "Mexico" }, + { 583, "fm", "Micronesia" }, + { 498, "md", "Moldova" }, + { 492, "mc", "Monaco" }, + { 496, "mn", "Mongolia" }, + { 500, "ms", "Montserrat" }, + { 504, "ma", "Morocco" }, + { 508, "mz", "Mozambique" }, + { 104, "mm", "Myanmar" }, + { 516, "na", "Namibia" }, + { 520, "nr", "Nauru" }, + { 524, "np", "Nepal" }, + { 528, "nl", "Netherlands" }, + { 530, "an", "Netherlands Antilles" }, + { 540, "nc", "New Caledonia" }, + { 554, "nz", "New Zealand" }, + { 558, "ni", "Nicaragua" }, + { 562, "ne", "Niger" }, + { 566, "ng", "Nigeria" }, + { 570, "nu", "Niue" }, + { 574, "nf", "Norfolk Island" }, + { 580, "mp", "Northern Mariana Islands" }, + { 578, "no", "Norway" }, + { 512, "om", "Oman" }, + { 586, "pk", "Pakistan" }, + { 585, "pw", "Palau" }, + { 275, "ps", "Palestinian Territory" }, + { 591, "pa", "Panama" }, + { 598, "pg", "Papua New Guinea" }, + { 600, "py", "Paraguay" }, + { 604, "pe", "Peru" }, + { 608, "ph", "Philippines" }, + { 612, "pn", "Pitcairn" }, + { 616, "pl", "Poland" }, + { 620, "pt", "Portugal" }, + { 630, "pr", "Puerto Rico" }, + { 634, "qa", "Qatar" }, + { 638, "re", "Reunion" }, + { 642, "ro", "Romania" }, + { 643, "ru", "Russia" }, + { 646, "rw", "Rwanda" }, + { 659, "kn", "Saint Kitts & Nevis" }, + { 662, "lc", "Saint Lucia" }, + { 670, "vc", "Saint Vincent" }, + { 882, "ws", "Samoa" }, + { 674, "sm", "San Marino" }, + { 678, "st", "Sao Tome & Principe" }, + { 682, "sa", "Saudi Arabia" }, + { 686, "sn", "Senegal" }, + { 891, "cs", "Serbia and Montenegro" }, + { 690, "sc", "Seychelles" }, + { 694, "sl", "Sierra Leone" }, + { 702, "sg", "Singapore" }, + { 703, "sk", "Slovakia" }, + { 705, "si", "Slovenia" }, + { 90, "sb", "Solomon Islands" }, + { 706, "so", "Somalia" }, + { 710, "za", "South Africa" }, + { 239, "gs", "South Georgia" }, + { 724, "es", "Spain" }, + { 144, "lk", "Sri Lanka" }, + { 654, "sh", "St. Helena" }, + { 666, "pm", "St. Pierre & Miquelon" }, + { 736, "sd", "Sudan" }, + { 740, "sr", "Suriname" }, + { 744, "sj", "Svalbard & Jan Mayen Islands" }, + { 748, "sz", "Swaziland" }, + { 752, "se", "Sweden" }, + { 756, "ch", "Switzerland" }, + { 760, "sy", "Syrian Arab Republic" }, + { 626, "tl", "Timor-Leste" }, + { 158, "tw", "Taiwan" }, + { 762, "tj", "Tajikistan" }, + { 834, "tz", "Tanzania" }, + { 764, "th", "Thailand" }, + { 768, "tg", "Togo" }, + { 772, "tk", "Tokelau" }, + { 776, "to", "Tonga" }, + { 780, "tt", "Trinidad & Tobago" }, + { 788, "tn", "Tunisia" }, + { 792, "tr", "Turkey" }, + { 795, "tm", "Turkmenistan" }, + { 796, "tc", "Turks & Caicos Islands" }, + { 798, "tv", "Tuvalu" }, + { 800, "ug", "Uganda" }, + { 804, "ua", "Ukraine" }, + { 784, "ae", "United Arab Emirates" }, + { 826, "gb", "United Kingdom" }, + { 840, "us", "United States" }, + { 581, "um", "United States Minor Outlying Islands" }, + { 858, "uy", "Uruguay" }, + { 860, "uz", "Uzbekistan" }, + { 548, "vu", "Vanuatu" }, + { 862, "ve", "Venezuela" }, + { 704, "vn", "Vietnam" }, + { 92, "vg", "Virgin Islands (British)" }, + { 850, "vi", "Virgin Islands (US)" }, + { 876, "wf", "Wallis & Futuna Islands" }, + { 732, "eh", "Western Sahara" }, + { 887, "ye", "Yemen" }, + { 894, "zm", "Zambia" }, + { 716, "zw", "Zimbabwe" } + }; + +/* + * Check if start of 'str' is simply an IPv4 address. + */ +#define BYTE_OK(x) ((x) >= 0 && (x) <= 255) + +static int is_addr(char *str, char **end) +{ + int a0, a1, a2, a3, num, rc = 0, length = 0; + + num = sscanf(str,"%3d.%3d.%3d.%3d%n",&a0,&a1,&a2,&a3,&length); + if( (num == 4) && + BYTE_OK(a0) && BYTE_OK(a1) && BYTE_OK(a2) && BYTE_OK(a3) && + length >= (3+4)) + { + rc = 1; + *end = str + length; + } + return rc; +} + +/* + * Find the country-code and name from the CNAME. E.g.: + * version 1: CNAME = zzno.countries.nerd.dk with address 127.0.2.66 + * yields ccode_A" = "no" and cnumber 578 (2.66). + * version 2: CNAME = <a.b.c.d>.zz.countries.nerd.dk with address 127.0.2.66 + * yields cnumber 578 (2.66). ccode_A is ""; + */ +static void find_country_from_cname(const char *cname, struct in_addr addr) +{ + const struct search_list *country; + char ccode_A2[3], *ccopy, *dot_4; + int cnumber, z0, z1, ver_1, ver_2; + unsigned long ip; + + ip = ntohl(addr.s_addr); + z0 = TOLOWER(cname[0]); + z1 = TOLOWER(cname[1]); + ccopy = strdup(cname); + dot_4 = NULL; + + ver_1 = (z0 == 'z' && z1 == 'z' && !strcasecmp(cname+4,nerd_ver1)); + ver_2 = (is_addr(ccopy,&dot_4) && !strcasecmp(dot_4,nerd_ver2)); + + if (ver_1) + { + const char *dot = strchr(cname, '.'); + if (dot != cname+4) + { + printf("Unexpected CNAME %s (ver_1)\n", cname); + free(ccopy); + return; + } + } + else if (ver_2) + { + z0 = TOLOWER(dot_4[1]); + z1 = TOLOWER(dot_4[2]); + if (z0 != 'z' && z1 != 'z') + { + printf("Unexpected CNAME %s (ver_2)\n", cname); + free(ccopy); + return; + } + } + else + { + printf("Unexpected CNAME %s (ver?)\n", cname); + free(ccopy); + return; + } + + if (ver_1) + { + ccode_A2[0] = (char)TOLOWER(cname[2]); + ccode_A2[1] = (char)TOLOWER(cname[3]); + ccode_A2[2] = '\0'; + } + else + ccode_A2[0] = '\0'; + + cnumber = ip & 0xFFFF; + + TRACE(("Found country-code `%s', number %d\n", + ver_1 ? ccode_A2 : "<n/a>", cnumber)); + + country = list_lookup(cnumber, country_list, + sizeof(country_list) / sizeof(country_list[0])); + if (!country) + printf("Name for country-number %d not found.\n", cnumber); + else + { + if (ver_1) + { + if ((country->short_name[0] != ccode_A2[0]) || + (country->short_name[1] != ccode_A2[1]) || + (country->short_name[2] != ccode_A2[2])) + printf("short-name mismatch; %s vs %s\n", + country->short_name, ccode_A2); + } + printf("%s (%s), number %d.\n", + country->long_name, country->short_name, cnumber); + } + free(ccopy); +} |