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/***************************************************************************
* _ _ ____ _
* 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 "first.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.
*
*/
static int test_resolve(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",
#ifdef CURLRES_IPV6
"/IPv6"
#else
""
#endif
);
return 0;
}
else if(!strcmp("--ipv6", argv[arg])) {
#ifdef CURLRES_IPV6
ipv_inuse = "IPv6";
use_ipv6 = TRUE;
arg++;
#else
puts("IPv6 support has been disabled in this program");
return 1;
#endif
}
else if(!strcmp("--ipv4", argv[arg])) {
/* for completeness, we support this option as well */
ipv_inuse = "IPv4";
#ifdef CURLRES_IPV6
use_ipv6 = FALSE;
#endif
arg++;
}
else {
host = argv[arg++];
}
}
if(!host) {
puts("Usage: resolve [option] <host>\n"
" --version\n"
" --ipv4"
#ifdef CURLRES_IPV6
"\n --ipv6"
#endif
);
return 1;
}
#ifdef _WIN32
if(win32_init())
return 2;
#endif
#ifdef 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;
rc = getaddrinfo(host, "80", &hints, &ai);
if(rc == 0)
freeaddrinfo(ai);
}
#else
{
struct hostent *he; /* gethostbyname() resolve */
#ifdef __AMIGA__
he = gethostbyname((unsigned char *)CURL_UNCONST(host));
#else
he = gethostbyname(host);
#endif
rc = !he;
}
#endif
if(rc)
printf("Resolving %s '%s' didn't work\n", ipv_inuse, host);
return !!rc;
}
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