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Annotation of embedaddon/curl/tests/server/resolve.c, revision 1.1

1.1     ! misho       1: /***************************************************************************
        !             2:  *                                  _   _ ____  _
        !             3:  *  Project                     ___| | | |  _ \| |
        !             4:  *                             / __| | | | |_) | |
        !             5:  *                            | (__| |_| |  _ <| |___
        !             6:  *                             \___|\___/|_| \_\_____|
        !             7:  *
        !             8:  * Copyright (C) 1998 - 2020, Daniel Stenberg, <daniel@haxx.se>, et al.
        !             9:  *
        !            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 https://curl.haxx.se/docs/copyright.html.
        !            13:  *
        !            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.
        !            17:  *
        !            18:  * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
        !            19:  * KIND, either express or implied.
        !            20:  *
        !            21:  ***************************************************************************/
        !            22: #include "server_setup.h"
        !            23: 
        !            24: /* Purpose
        !            25:  *
        !            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.
        !            29:  *
        !            30:  * Like if 'localhost' actual exists etc.
        !            31:  *
        !            32:  */
        !            33: 
        !            34: #ifdef HAVE_SIGNAL_H
        !            35: #include <signal.h>
        !            36: #endif
        !            37: #ifdef HAVE_NETINET_IN_H
        !            38: #include <netinet/in.h>
        !            39: #endif
        !            40: #ifdef _XOPEN_SOURCE_EXTENDED
        !            41: /* This define is "almost" required to build on HPUX 11 */
        !            42: #include <arpa/inet.h>
        !            43: #endif
        !            44: #ifdef HAVE_NETDB_H
        !            45: #include <netdb.h>
        !            46: #endif
        !            47: 
        !            48: #define ENABLE_CURLX_PRINTF
        !            49: /* make the curlx header define all printf() functions to use the curlx_*
        !            50:    versions instead */
        !            51: #include "curlx.h" /* from the private lib dir */
        !            52: #include "util.h"
        !            53: 
        !            54: /* include memdebug.h last */
        !            55: #include "memdebug.h"
        !            56: 
        !            57: static bool use_ipv6 = FALSE;
        !            58: static const char *ipv_inuse = "IPv4";
        !            59: 
        !            60: const char *serverlogfile = ""; /* for a util.c function we don't use */
        !            61: 
        !            62: int main(int argc, char *argv[])
        !            63: {
        !            64:   int arg = 1;
        !            65:   const char *host = NULL;
        !            66:   int rc = 0;
        !            67: 
        !            68:   while(argc>arg) {
        !            69:     if(!strcmp("--version", argv[arg])) {
        !            70:       printf("resolve IPv4%s\n",
        !            71: #if defined(CURLRES_IPV6)
        !            72:              "/IPv6"
        !            73: #else
        !            74:              ""
        !            75: #endif
        !            76:              );
        !            77:       return 0;
        !            78:     }
        !            79:     else if(!strcmp("--ipv6", argv[arg])) {
        !            80:       ipv_inuse = "IPv6";
        !            81:       use_ipv6 = TRUE;
        !            82:       arg++;
        !            83:     }
        !            84:     else if(!strcmp("--ipv4", argv[arg])) {
        !            85:       /* for completeness, we support this option as well */
        !            86:       ipv_inuse = "IPv4";
        !            87:       use_ipv6 = FALSE;
        !            88:       arg++;
        !            89:     }
        !            90:     else {
        !            91:       host = argv[arg++];
        !            92:     }
        !            93:   }
        !            94:   if(!host) {
        !            95:     puts("Usage: resolve [option] <host>\n"
        !            96:          " --version\n"
        !            97:          " --ipv4"
        !            98: #if defined(CURLRES_IPV6)
        !            99:          "\n --ipv6"
        !           100: #endif
        !           101:          );
        !           102:     return 1;
        !           103:   }
        !           104: 
        !           105: #ifdef WIN32
        !           106:   win32_init();
        !           107:   atexit(win32_cleanup);
        !           108: #endif
        !           109: 
        !           110: #if defined(CURLRES_IPV6)
        !           111:   if(use_ipv6) {
        !           112:     /* Check that the system has IPv6 enabled before checking the resolver */
        !           113:     curl_socket_t s = socket(PF_INET6, SOCK_DGRAM, 0);
        !           114:     if(s == CURL_SOCKET_BAD)
        !           115:       /* an IPv6 address was requested and we can't get/use one */
        !           116:       rc = -1;
        !           117:     else {
        !           118:       sclose(s);
        !           119:     }
        !           120:   }
        !           121: 
        !           122:   if(rc == 0) {
        !           123:     /* getaddrinfo() resolve */
        !           124:     struct addrinfo *ai;
        !           125:     struct addrinfo hints;
        !           126: 
        !           127:     memset(&hints, 0, sizeof(hints));
        !           128:     hints.ai_family = use_ipv6 ? PF_INET6 : PF_INET;
        !           129:     hints.ai_socktype = SOCK_STREAM;
        !           130:     hints.ai_flags = 0;
        !           131:     /* Use parenthesis around functions to stop them from being replaced by
        !           132:        the macro in memdebug.h */
        !           133:     rc = (getaddrinfo)(host, "80", &hints, &ai);
        !           134:     if(rc == 0)
        !           135:       (freeaddrinfo)(ai);
        !           136:   }
        !           137: #else
        !           138:   if(use_ipv6) {
        !           139:     puts("IPv6 support has been disabled in this program");
        !           140:     return 1;
        !           141:   }
        !           142:   else {
        !           143:     /* gethostbyname() resolve */
        !           144:     struct hostent *he;
        !           145: 
        !           146:     he = gethostbyname(host);
        !           147: 
        !           148:     rc = !he;
        !           149:   }
        !           150: #endif
        !           151: 
        !           152:   if(rc)
        !           153:     printf("Resolving %s '%s' didn't work\n", ipv_inuse, host);
        !           154: 
        !           155:   return !!rc;
        !           156: }