157 lines
3.9 KiB
C
157 lines
3.9 KiB
C
/***************************************************************************
|
|
* _ _ ____ _
|
|
* Project ___| | | | _ \| |
|
|
* / __| | | | |_) | |
|
|
* | (__| |_| | _ <| |___
|
|
* \___|\___/|_| \_\_____|
|
|
*
|
|
* Copyright (C) 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.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.
|
|
*
|
|
* SPDX-License-Identifier: curl
|
|
*
|
|
***************************************************************************/
|
|
#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.
|
|
*
|
|
*/
|
|
|
|
#include <signal.h>
|
|
#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;
|
|
}
|