1 /***************************************************************************
3 * Project ___| | | | _ \| |
5 * | (__| |_| | _ <| |___
6 * \___|\___/|_| \_\_____|
8 * Copyright (C) 1998 - 2010, Daniel Stenberg, <daniel@haxx.se>, et al.
10 * This software is licensed as described in the file COPYING, which
11 * you should have received as part of this distribution. The terms
12 * are also available at http://curl.haxx.se/docs/copyright.html.
14 * You may opt to use, copy, modify, merge, publish, distribute and/or sell
15 * copies of the Software, and permit persons to whom the Software is
16 * furnished to do so, under the terms of the COPYING file.
18 * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
19 * KIND, either express or implied.
22 ***************************************************************************/
26 * Resolve the given name, using system name resolve functions (NOT any
27 * function provided by libcurl). Used to see if the name exists and thus if
28 * we can allow a test case to use it for testing.
30 * Like if 'localhost' actual exists etc.
34 #define CURL_NO_OLDIES
36 #include "setup.h" /* portability help from the lib directory */
44 #ifdef HAVE_SYS_TYPES_H
45 #include <sys/types.h>
47 #ifdef HAVE_SYS_SOCKET_H
48 #include <sys/socket.h>
50 #ifdef HAVE_NETINET_IN_H
51 #include <netinet/in.h>
53 #ifdef _XOPEN_SOURCE_EXTENDED
54 /* This define is "almost" required to build on HPUX 11 */
55 #include <arpa/inet.h>
61 #define ENABLE_CURLX_PRINTF
62 /* make the curlx header define all printf() functions to use the curlx_*
64 #include "curlx.h" /* from the private lib dir */
67 /* include memdebug.h last */
70 static bool use_ipv6 = FALSE;
71 static const char *ipv_inuse = "IPv4";
73 const char *serverlogfile=""; /* for a util.c function we don't use */
75 int main(int argc, char *argv[])
78 const char *host = NULL;
82 if(!strcmp("--version", argv[arg])) {
83 printf("resolve IPv4%s\n",
92 else if(!strcmp("--ipv6", argv[arg])) {
97 else if(!strcmp("--ipv4", argv[arg])) {
98 /* for completeness, we support this option as well */
108 puts("Usage: resolve [option] <host>\n"
120 atexit(win32_cleanup);
124 /* gethostbyname() resolve */
127 he = gethostbyname(host);
133 /* Check that the system has IPv6 enabled before checking the resolver */
134 curl_socket_t s = socket(PF_INET6, SOCK_DGRAM, 0);
135 if(s == CURL_SOCKET_BAD)
136 /* an ipv6 address was requested and we can't get/use one */
143 /* getaddrinfo() resolve */
145 struct addrinfo hints;
147 memset(&hints, 0, sizeof(hints));
148 hints.ai_family = PF_INET6;
149 hints.ai_socktype = SOCK_STREAM;
150 hints.ai_flags = AI_CANONNAME;
151 /* Use parenthesis around function to stop it from being replaced by
152 the macro in memdebug.h */
153 rc = (getaddrinfo)(host, "80", &hints, &ai);
157 puts("IPv6 support has been disabled in this program");
162 printf("Resolving %s '%s' didn't work\n", ipv_inuse, host);