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/***************************************************************************
* _ _ ____ _
* Project ___| | | | _ \| |
* / __| | | | |_) | |
* | (__| |_| | _ <| |___
* \___|\___/|_| \_\_____|
*
* Copyright (C) 1998 - 2020, Daniel Stenberg, <daniel@haxx.se>, et al.
*
* This software is licensed as described in the file COPYING, which
* you should have received as part of this distribution. The terms
* are also available at https://curl.haxx.se/docs/copyright.html.
*
* You may opt to use, copy, modify, merge, publish, distribute and/or sell
* copies of the Software, and permit persons to whom the Software is
* furnished to do so, under the terms of the COPYING file.
*
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
* KIND, either express or implied.
*
***************************************************************************/
#include "server_setup.h"
/* Purpose
*
* Resolve the given name, using system name resolve functions (NOT any
* function provided by libcurl). Used to see if the name exists and thus if
* we can allow a test case to use it for testing.
*
* Like if 'localhost' actual exists etc.
*
*/
#ifdef HAVE_SIGNAL_H
#include <signal.h>
#endif
#ifdef HAVE_NETINET_IN_H
#include <netinet/in.h>
#endif
#ifdef _XOPEN_SOURCE_EXTENDED
/* This define is "almost" required to build on HPUX 11 */
#include <arpa/inet.h>
#endif
#ifdef HAVE_NETDB_H
#include <netdb.h>
#endif
#define ENABLE_CURLX_PRINTF
/* make the curlx header define all printf() functions to use the curlx_*
versions instead */
#include "curlx.h" /* from the private lib dir */
#include "util.h"
/* include memdebug.h last */
#include "memdebug.h"
static bool use_ipv6 = FALSE;
static const char *ipv_inuse = "IPv4";
const char *serverlogfile = ""; /* for a util.c function we don't use */
int main(int argc, char *argv[])
{
int arg = 1;
const char *host = NULL;
int rc = 0;
while(argc>arg) {
if(!strcmp("--version", argv[arg])) {
printf("resolve IPv4%s\n",
#if defined(CURLRES_IPV6)
"/IPv6"
#else
""
#endif
);
return 0;
}
else if(!strcmp("--ipv6", argv[arg])) {
ipv_inuse = "IPv6";
use_ipv6 = TRUE;
arg++;
}
else if(!strcmp("--ipv4", argv[arg])) {
/* for completeness, we support this option as well */
ipv_inuse = "IPv4";
use_ipv6 = FALSE;
arg++;
}
else {
host = argv[arg++];
}
}
if(!host) {
puts("Usage: resolve [option] <host>\n"
" --version\n"
" --ipv4"
#if defined(CURLRES_IPV6)
"\n --ipv6"
#endif
);
return 1;
}
#ifdef WIN32
win32_init();
atexit(win32_cleanup);
#endif
#if defined(CURLRES_IPV6)
if(use_ipv6) {
/* Check that the system has IPv6 enabled before checking the resolver */
curl_socket_t s = socket(PF_INET6, SOCK_DGRAM, 0);
if(s == CURL_SOCKET_BAD)
/* an IPv6 address was requested and we can't get/use one */
rc = -1;
else {
sclose(s);
}
}
if(rc == 0) {
/* getaddrinfo() resolve */
struct addrinfo *ai;
struct addrinfo hints;
memset(&hints, 0, sizeof(hints));
hints.ai_family = use_ipv6 ? PF_INET6 : PF_INET;
hints.ai_socktype = SOCK_STREAM;
hints.ai_flags = 0;
/* Use parenthesis around functions to stop them from being replaced by
the macro in memdebug.h */
rc = (getaddrinfo)(host, "80", &hints, &ai);
if(rc == 0)
(freeaddrinfo)(ai);
}
#else
if(use_ipv6) {
puts("IPv6 support has been disabled in this program");
return 1;
}
else {
/* gethostbyname() resolve */
struct hostent *he;
he = gethostbyname(host);
rc = !he;
}
#endif
if(rc)
printf("Resolving %s '%s' didn't work\n", ipv_inuse, host);
return !!rc;
}
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