mirror of https://github.com/c-ares/c-ares.git
name from an IPv4-address or host-name. Using the service of countries.nerd.dk.pull/1/head
Gisle Vanem
17 years ago
parent
6d913add78
commit
89556eed2c
1 changed files with 584 additions and 0 deletions
@ -0,0 +1,584 @@ |
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/*
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* $Id$ |
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* |
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* IP-address/hostname to country converter. |
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* |
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* Problem; you want to know where IP a.b.c.d is located. |
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* |
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* Use ares_gethostbyname ("d.c.b.a.zz.countries.nerd.dk") |
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* and get the CNAME (host->h_name). Result will be: |
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* CNAME = zz<CC>.countries.nerd.dk with address 127.0.x.y (ver 1) or |
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* CNAME = <a.b.c.d>.zz.countries.nerd.dk with address 127.0.x.y (ver 2) |
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* |
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* The 2 letter country code in <CC> and the ISO-3166 country |
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* number in x.y (number = x*256 + y). Version 2 of the protocol is missing |
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* the <CC> number. |
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* |
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* Ref: http://countries.nerd.dk/more.html
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* |
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* Written by G. Vanem <gvanem@broadpark.no> 2006, 2007 |
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* |
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* NB! This program may not be big-endian aware. |
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* |
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* Permission to use, copy, modify, and distribute this |
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* software and its documentation for any purpose and without |
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* fee is hereby granted, provided that the above copyright |
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* notice appear in all copies and that both that copyright |
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* notice and this permission notice appear in supporting |
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* documentation, and that the name of M.I.T. not be used in |
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* advertising or publicity pertaining to distribution of the |
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* software without specific, written prior permission. |
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* M.I.T. makes no representations about the suitability of |
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* this software for any purpose. It is provided "as is" |
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* without express or implied warranty. |
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*/ |
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#include "setup.h" |
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#include <stdio.h> |
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#include <stdlib.h> |
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#include <stdarg.h> |
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#include <string.h> |
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#include <ctype.h> |
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#ifdef HAVE_UNISTD_H |
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#include <unistd.h> |
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#endif |
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#if defined(WIN32) |
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#include <winsock.h> |
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#else |
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#include <arpa/inet.h> |
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#include <netinet/in.h> |
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#include <netdb.h> |
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#endif |
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#include "ares.h" |
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#include "ares_getopt.h" |
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#include "inet_net_pton.h" |
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#include "inet_ntop.h" |
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static const char *usage = "acountry [-vh?] {host|addr} ...\n"; |
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static const char nerd_fmt[] = "%u.%u.%u.%u.zz.countries.nerd.dk"; |
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static const char *nerd_ver1 = nerd_fmt + 14; |
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static const char *nerd_ver2 = nerd_fmt + 11; |
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static int verbose = 0; |
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#define TRACE(fmt) do { \ |
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if (verbose > 0) \
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printf fmt ; \
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} while (0) |
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static void wait_ares(ares_channel channel); |
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static void callback(void *arg, int status, int timeouts, struct hostent *host); |
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static void callback2(void *arg, int status, int timeouts, struct hostent *host); |
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static void find_country_from_cname(const char *cname, struct in_addr addr); |
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static void Abort(const char *fmt, ...) |
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{ |
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va_list args; |
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va_start(args, fmt); |
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vfprintf(stderr, fmt, args); |
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va_end(args); |
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exit(1); |
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} |
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int main(int argc, char **argv) |
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{ |
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ares_channel channel; |
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int ch, status; |
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#ifdef WIN32 |
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WORD wVersionRequested = MAKEWORD(USE_WINSOCK,USE_WINSOCK); |
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WSADATA wsaData; |
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WSAStartup(wVersionRequested, &wsaData); |
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#endif |
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while ((ch = ares_getopt(argc, argv, "vh?")) != -1) |
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switch (ch) |
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{ |
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case 'v': |
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verbose++; |
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break; |
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case 'h': |
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case '?': |
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default: |
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Abort(usage); |
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} |
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argc -= optind; |
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argv += optind; |
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if (argc < 1) |
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Abort(usage); |
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status = ares_init(&channel); |
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if (status != ARES_SUCCESS) |
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{ |
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fprintf(stderr, "ares_init: %s\n", ares_strerror(status)); |
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return 1; |
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} |
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/* Initiate the queries, one per command-line argument. */ |
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for ( ; *argv; argv++) |
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{ |
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struct in_addr addr; |
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char buf[100]; |
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/* If this fails, assume '*argv' is a host-name that
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* must be resolved first |
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*/ |
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if (ares_inet_pton(AF_INET, *argv, &addr) != 1) |
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{ |
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ares_gethostbyname(channel, *argv, AF_INET, callback2, &addr); |
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wait_ares(channel); |
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if (addr.s_addr == INADDR_NONE) |
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{ |
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printf("Failed to lookup %s\n", *argv); |
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continue; |
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} |
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} |
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sprintf(buf, nerd_fmt, |
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(unsigned int)(addr.s_addr >> 24), |
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(unsigned int)((addr.s_addr >> 16) & 255), |
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(unsigned int)((addr.s_addr >> 8) & 255), |
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(unsigned int)(addr.s_addr & 255)); |
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TRACE(("Looking up %s...", buf)); |
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fflush(stdout); |
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ares_gethostbyname(channel, buf, AF_INET, callback, buf); |
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} |
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wait_ares(channel); |
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ares_destroy(channel); |
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#ifdef WIN32 |
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WSACleanup(); |
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#endif |
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return 0; |
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} |
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/*
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* Wait for the queries to complete. |
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*/ |
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static void wait_ares(ares_channel channel) |
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{ |
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while (1) |
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{ |
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struct timeval *tvp, tv; |
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fd_set read_fds, write_fds; |
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int nfds; |
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FD_ZERO(&read_fds); |
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FD_ZERO(&write_fds); |
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nfds = ares_fds(channel, &read_fds, &write_fds); |
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if (nfds == 0) |
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break; |
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tvp = ares_timeout(channel, NULL, &tv); |
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select(nfds, &read_fds, &write_fds, NULL, tvp); |
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ares_process(channel, &read_fds, &write_fds); |
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} |
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} |
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/*
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* This is the callback used when we have the IP-address of interest. |
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* Extract the CNAME and figure out the country-code from it. |
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*/ |
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static void callback(void *arg, int status, int timeouts, struct hostent *host) |
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{ |
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const char *name = (const char*)arg; |
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const char *cname; |
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char buf[20]; |
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(void)timeouts; |
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if (!host || status != ARES_SUCCESS) |
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{ |
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printf("Failed to lookup %s: %s\n", name, ares_strerror(status)); |
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return; |
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} |
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TRACE(("\nFound address %s, name %s\n", |
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ares_inet_ntop(AF_INET,(const char*)host->h_addr,buf,sizeof(buf)), |
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host->h_name)); |
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cname = host->h_name; /* CNAME gets put here */ |
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if (!cname) |
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printf("Failed to get CNAME for %s\n", name); |
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else |
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find_country_from_cname(cname, *(struct in_addr*)host->h_addr); |
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} |
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/*
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* This is the callback used to obtain the IP-address of the host of interest. |
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*/ |
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static void callback2(void *arg, int status, int timeouts, struct hostent *host) |
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{ |
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struct in_addr *addr = (struct in_addr*) arg; |
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(void)timeouts; |
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if (!host || status != ARES_SUCCESS) |
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memset(addr, INADDR_NONE, sizeof(*addr)); |
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else |
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memcpy(addr, host->h_addr, sizeof(*addr)); |
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} |
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struct search_list { |
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int country_number; /* ISO-3166 country number */ |
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char short_name[3]; /* A2 short country code */ |
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const char *long_name; /* normal country name */ |
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}; |
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const struct search_list *list_lookup(int number, const struct search_list *list, int num) |
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{ |
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while (num > 0 && list->long_name) |
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{ |
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if (list->country_number == number) |
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return (list); |
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num--; |
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list++; |
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} |
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return (NULL); |
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} |
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/*
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* Ref: ftp://ftp.ripe.net/iso3166-countrycodes.txt
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*/ |
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static const struct search_list country_list[] = { |
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{ 4, "af", "Afghanistan" }, |
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{ 248, "ax", "Åland Island" }, |
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{ 8, "al", "Albania" }, |
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{ 12, "dz", "Algeria" }, |
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{ 16, "as", "American Samoa" }, |
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{ 20, "ad", "Andorra" }, |
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{ 24, "ao", "Angola" }, |
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{ 660, "ai", "Anguilla" }, |
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{ 10, "aq", "Antarctica" }, |
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{ 28, "ag", "Antigua & Barbuda" }, |
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{ 32, "ar", "Argentina" }, |
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{ 51, "am", "Armenia" }, |
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{ 533, "aw", "Aruba" }, |
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{ 36, "au", "Australia" }, |
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{ 40, "at", "Austria" }, |
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{ 31, "az", "Azerbaijan" }, |
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{ 44, "bs", "Bahamas" }, |
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{ 48, "bh", "Bahrain" }, |
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{ 50, "bd", "Bangladesh" }, |
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{ 52, "bb", "Barbados" }, |
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{ 112, "by", "Belarus" }, |
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{ 56, "be", "Belgium" }, |
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{ 84, "bz", "Belize" }, |
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{ 204, "bj", "Benin" }, |
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{ 60, "bm", "Bermuda" }, |
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{ 64, "bt", "Bhutan" }, |
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{ 68, "bo", "Bolivia" }, |
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{ 70, "ba", "Bosnia & Herzegowina" }, |
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{ 72, "bw", "Botswana" }, |
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{ 74, "bv", "Bouvet Island" }, |
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{ 76, "br", "Brazil" }, |
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{ 86, "io", "British Indian Ocean Territory" }, |
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{ 96, "bn", "Brunei Darussalam" }, |
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{ 100, "bg", "Bulgaria" }, |
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{ 854, "bf", "Burkina Faso" }, |
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{ 108, "bi", "Burundi" }, |
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{ 116, "kh", "Cambodia" }, |
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{ 120, "cm", "Cameroon" }, |
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{ 124, "ca", "Canada" }, |
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{ 132, "cv", "Cape Verde" }, |
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{ 136, "ky", "Cayman Islands" }, |
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{ 140, "cf", "Central African Republic" }, |
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{ 148, "td", "Chad" }, |
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{ 152, "cl", "Chile" }, |
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{ 156, "cn", "China" }, |
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{ 162, "cx", "Christmas Island" }, |
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{ 166, "cc", "Cocos Islands" }, |
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{ 170, "co", "Colombia" }, |
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{ 174, "km", "Comoros" }, |
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{ 178, "cg", "Congo" }, |
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{ 180, "cd", "Congo" }, |
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{ 184, "ck", "Cook Islands" }, |
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{ 188, "cr", "Costa Rica" }, |
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{ 384, "ci", "Cote d'Ivoire" }, |
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{ 191, "hr", "Croatia" }, |
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{ 192, "cu", "Cuba" }, |
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{ 196, "cy", "Cyprus" }, |
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{ 203, "cz", "Czech Republic" }, |
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{ 208, "dk", "Denmark" }, |
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{ 262, "dj", "Djibouti" }, |
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{ 212, "dm", "Dominica" }, |
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{ 214, "do", "Dominican Republic" }, |
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{ 218, "ec", "Ecuador" }, |
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{ 818, "eg", "Egypt" }, |
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{ 222, "sv", "El Salvador" }, |
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{ 226, "gq", "Equatorial Guinea" }, |
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{ 232, "er", "Eritrea" }, |
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{ 233, "ee", "Estonia" }, |
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{ 231, "et", "Ethiopia" }, |
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{ 238, "fk", "Falkland Islands" }, |
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{ 234, "fo", "Faroe Islands" }, |
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{ 242, "fj", "Fiji" }, |
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{ 246, "fi", "Finland" }, |
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{ 250, "fr", "France" }, |
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{ 249, "fx", "France, Metropolitan" }, |
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{ 254, "gf", "French Guiana" }, |
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{ 258, "pf", "French Polynesia" }, |
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{ 260, "tf", "French Southern Territories" }, |
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{ 266, "ga", "Gabon" }, |
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{ 270, "gm", "Gambia" }, |
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{ 268, "ge", "Georgia" }, |
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{ 276, "de", "Germany" }, |
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{ 288, "gh", "Ghana" }, |
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{ 292, "gi", "Gibraltar" }, |
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{ 300, "gr", "Greece" }, |
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{ 304, "gl", "Greenland" }, |
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{ 308, "gd", "Grenada" }, |
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{ 312, "gp", "Guadeloupe" }, |
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{ 316, "gu", "Guam" }, |
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{ 320, "gt", "Guatemala" }, |
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{ 324, "gn", "Guinea" }, |
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{ 624, "gw", "Guinea-Bissau" }, |
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{ 328, "gy", "Guyana" }, |
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{ 332, "ht", "Haiti" }, |
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{ 334, "hm", "Heard & Mc Donald Islands" }, |
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{ 336, "va", "Vatican City" }, |
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{ 340, "hn", "Honduras" }, |
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{ 344, "hk", "Hong kong" }, |
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{ 348, "hu", "Hungary" }, |
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{ 352, "is", "Iceland" }, |
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{ 356, "in", "India" }, |
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{ 360, "id", "Indonesia" }, |
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{ 364, "ir", "Iran" }, |
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{ 368, "iq", "Iraq" }, |
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{ 372, "ie", "Ireland" }, |
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{ 376, "il", "Israel" }, |
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{ 380, "it", "Italy" }, |
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{ 388, "jm", "Jamaica" }, |
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{ 392, "jp", "Japan" }, |
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{ 400, "jo", "Jordan" }, |
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{ 398, "kz", "Kazakhstan" }, |
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{ 404, "ke", "Kenya" }, |
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{ 296, "ki", "Kiribati" }, |
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{ 408, "kp", "Korea (north)" }, |
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{ 410, "kr", "Korea (south)" }, |
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{ 414, "kw", "Kuwait" }, |
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{ 417, "kg", "Kyrgyzstan" }, |
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{ 418, "la", "Laos" }, |
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{ 428, "lv", "Latvia" }, |
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{ 422, "lb", "Lebanon" }, |
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{ 426, "ls", "Lesotho" }, |
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{ 430, "lr", "Liberia" }, |
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{ 434, "ly", "Libya" }, |
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{ 438, "li", "Liechtenstein" }, |
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{ 440, "lt", "Lithuania" }, |
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{ 442, "lu", "Luxembourg" }, |
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{ 446, "mo", "Macao" }, |
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{ 807, "mk", "Macedonia" }, |
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{ 450, "mg", "Madagascar" }, |
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{ 454, "mw", "Malawi" }, |
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{ 458, "my", "Malaysia" }, |
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{ 462, "mv", "Maldives" }, |
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{ 466, "ml", "Mali" }, |
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{ 470, "mt", "Malta" }, |
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{ 584, "mh", "Marshall Islands" }, |
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{ 474, "mq", "Martinique" }, |
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{ 478, "mr", "Mauritania" }, |
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{ 480, "mu", "Mauritius" }, |
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{ 175, "yt", "Mayotte" }, |
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{ 484, "mx", "Mexico" }, |
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{ 583, "fm", "Micronesia" }, |
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{ 498, "md", "Moldova" }, |
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{ 492, "mc", "Monaco" }, |
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{ 496, "mn", "Mongolia" }, |
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{ 500, "ms", "Montserrat" }, |
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{ 504, "ma", "Morocco" }, |
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{ 508, "mz", "Mozambique" }, |
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{ 104, "mm", "Myanmar" }, |
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{ 516, "na", "Namibia" }, |
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{ 520, "nr", "Nauru" }, |
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{ 524, "np", "Nepal" }, |
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{ 528, "nl", "Netherlands" }, |
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{ 530, "an", "Netherlands Antilles" }, |
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{ 540, "nc", "New Caledonia" }, |
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{ 554, "nz", "New Zealand" }, |
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{ 558, "ni", "Nicaragua" }, |
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{ 562, "ne", "Niger" }, |
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{ 566, "ng", "Nigeria" }, |
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{ 570, "nu", "Niue" }, |
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{ 574, "nf", "Norfolk Island" }, |
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{ 580, "mp", "Northern Mariana Islands" }, |
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{ 578, "no", "Norway" }, |
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{ 512, "om", "Oman" }, |
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{ 586, "pk", "Pakistan" }, |
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{ 585, "pw", "Palau" }, |
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{ 275, "ps", "Palestinian Territory" }, |
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{ 591, "pa", "Panama" }, |
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{ 598, "pg", "Papua New Guinea" }, |
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{ 600, "py", "Paraguay" }, |
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{ 604, "pe", "Peru" }, |
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{ 608, "ph", "Philippines" }, |
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{ 612, "pn", "Pitcairn" }, |
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{ 616, "pl", "Poland" }, |
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{ 620, "pt", "Portugal" }, |
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{ 630, "pr", "Puerto Rico" }, |
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{ 634, "qa", "Qatar" }, |
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{ 638, "re", "Reunion" }, |
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{ 642, "ro", "Romania" }, |
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{ 643, "ru", "Russia" }, |
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{ 646, "rw", "Rwanda" }, |
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{ 659, "kn", "Saint Kitts & Nevis" }, |
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{ 662, "lc", "Saint Lucia" }, |
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{ 670, "vc", "Saint Vincent" }, |
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{ 882, "ws", "Samoa" }, |
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{ 674, "sm", "San Marino" }, |
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{ 678, "st", "Sao Tome & Principe" }, |
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{ 682, "sa", "Saudi Arabia" }, |
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{ 686, "sn", "Senegal" }, |
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{ 891, "cs", "Serbia and Montenegro" }, |
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{ 690, "sc", "Seychelles" }, |
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{ 694, "sl", "Sierra Leone" }, |
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{ 702, "sg", "Singapore" }, |
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{ 703, "sk", "Slovakia" }, |
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{ 705, "si", "Slovenia" }, |
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{ 90, "sb", "Solomon Islands" }, |
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{ 706, "so", "Somalia" }, |
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{ 710, "za", "South Africa" }, |
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{ 239, "gs", "South Georgia" }, |
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{ 724, "es", "Spain" }, |
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{ 144, "lk", "Sri Lanka" }, |
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{ 654, "sh", "St. Helena" }, |
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{ 666, "pm", "St. Pierre & Miquelon" }, |
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{ 736, "sd", "Sudan" }, |
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{ 740, "sr", "Suriname" }, |
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{ 744, "sj", "Svalbard & Jan Mayen Islands" }, |
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{ 748, "sz", "Swaziland" }, |
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{ 752, "se", "Sweden" }, |
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{ 756, "ch", "Switzerland" }, |
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{ 760, "sy", "Syrian Arab Republic" }, |
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{ 626, "tl", "Timor-Leste" }, |
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{ 158, "tw", "Taiwan" }, |
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{ 762, "tj", "Tajikistan" }, |
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{ 834, "tz", "Tanzania" }, |
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{ 764, "th", "Thailand" }, |
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{ 768, "tg", "Togo" }, |
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{ 772, "tk", "Tokelau" }, |
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{ 776, "to", "Tonga" }, |
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{ 780, "tt", "Trinidad & Tobago" }, |
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{ 788, "tn", "Tunisia" }, |
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{ 792, "tr", "Turkey" }, |
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{ 795, "tm", "Turkmenistan" }, |
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{ 796, "tc", "Turks & Caicos Islands" }, |
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{ 798, "tv", "Tuvalu" }, |
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{ 800, "ug", "Uganda" }, |
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{ 804, "ua", "Ukraine" }, |
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{ 784, "ae", "United Arab Emirates" }, |
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{ 826, "gb", "United Kingdom" }, |
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{ 840, "us", "United States" }, |
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{ 581, "um", "United States Minor Outlying Islands" }, |
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{ 858, "uy", "Uruguay" }, |
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{ 860, "uz", "Uzbekistan" }, |
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{ 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; |
||||
|
||||
if ((num = sscanf(str,"%3d.%3d.%3d.%3d%n",&a0,&a1,&a2,&a3,&length)) == 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; |
||||
u_long ip; |
||||
|
||||
ip = ntohl(addr.s_addr); |
||||
z0 = tolower(cname[0]); |
||||
z1 = tolower(cname[1]); |
||||
ccopy = strdup(cname); |
||||
|
||||
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 ((z0 != 'z' && z1 != 'z') || dot != cname+4) |
||||
{ |
||||
printf("Unexpected CNAME %s (ver_1)\n", cname); |
||||
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); |
||||
return; |
||||
} |
||||
} |
||||
else |
||||
{ |
||||
printf("Unexpected CNAME %s (ver?)\n", cname); |
||||
return; |
||||
} |
||||
|
||||
if (ver_1) |
||||
{ |
||||
ccode_A2[0] = tolower(cname[2]); |
||||
ccode_A2[1] = 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 && *(unsigned short*)&country->short_name != *(unsigned*)&ccode_A2) |
||||
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); |
||||
} |
||||
|
||||
Loading…
Reference in new issue