mirror of
https://github.com/moparisthebest/curl
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590 lines
24 KiB
C
590 lines
24 KiB
C
/*
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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, "dvh?")) != -1)
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switch (ch)
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{
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case 'd':
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#ifdef WATT32
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dbug_init();
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#endif
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break;
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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", "<EFBFBD>land 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" },
|
||
{ 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;
|
||
|
||
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);
|
||
}
|
||
|