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    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: 
   23: /*
   24:  * Check for bugs #1303 and #1327: libcurl should never remove DNS entries
   25:  * created via CURLOPT_RESOLVE, neither after DNS_CACHE_TIMEOUT elapses
   26:  * (test1515) nor a dead connection is detected (test1616).
   27:  */
   28: 
   29: #include "test.h"
   30: #include "testutil.h"
   31: #include "warnless.h"
   32: #include "memdebug.h"
   33: 
   34: #define TEST_HANG_TIMEOUT 60 * 1000
   35: 
   36: #define DNS_TIMEOUT 1
   37: 
   38: #if defined(WIN32) || defined(_WIN32)
   39: #define sleep(sec) Sleep ((sec)*1000)
   40: #endif
   41: 
   42: static int debug_callback(CURL *curl, curl_infotype info, char *msg,
   43:                           size_t len, void *ptr)
   44: {
   45:   (void)curl;
   46:   (void)ptr;
   47: 
   48:   if(info == CURLINFO_TEXT)
   49:     fprintf(stderr, "debug: %.*s", (int) len, msg);
   50: 
   51:   return 0;
   52: }
   53: 
   54: static int do_one_request(CURLM *m, char *URL, char *resolve)
   55: {
   56:   CURL *curls;
   57:   struct curl_slist *resolve_list = NULL;
   58:   int still_running;
   59:   int res = 0;
   60:   CURLMsg *msg;
   61:   int msgs_left;
   62: 
   63:   resolve_list = curl_slist_append(resolve_list, resolve);
   64: 
   65:   easy_init(curls);
   66: 
   67:   easy_setopt(curls, CURLOPT_URL, URL);
   68:   easy_setopt(curls, CURLOPT_RESOLVE, resolve_list);
   69:   easy_setopt(curls, CURLOPT_DEBUGFUNCTION, debug_callback);
   70:   easy_setopt(curls, CURLOPT_VERBOSE, 1);
   71:   easy_setopt(curls, CURLOPT_DNS_CACHE_TIMEOUT, DNS_TIMEOUT);
   72: 
   73:   multi_add_handle(m, curls);
   74:   multi_perform(m, &still_running);
   75: 
   76:   abort_on_test_timeout();
   77: 
   78:   while(still_running) {
   79:     struct timeval timeout;
   80:     fd_set fdread, fdwrite, fdexcep;
   81:     int maxfd = -99;
   82: 
   83:     FD_ZERO(&fdread);
   84:     FD_ZERO(&fdwrite);
   85:     FD_ZERO(&fdexcep);
   86:     timeout.tv_sec = 1;
   87:     timeout.tv_usec = 0;
   88: 
   89:     multi_fdset(m, &fdread, &fdwrite, &fdexcep, &maxfd);
   90:     select_test(maxfd + 1, &fdread, &fdwrite, &fdexcep, &timeout);
   91: 
   92:     abort_on_test_timeout();
   93:     multi_perform(m, &still_running);
   94: 
   95:     abort_on_test_timeout();
   96:   }
   97: 
   98:   do {
   99:     msg = curl_multi_info_read(m, &msgs_left);
  100:     if(msg && msg->msg == CURLMSG_DONE && msg->easy_handle == curls) {
  101:       res = msg->data.result;
  102:       break;
  103:     }
  104:   } while(msg);
  105: 
  106: test_cleanup:
  107: 
  108:   curl_multi_remove_handle(m, curls);
  109:   curl_easy_cleanup(curls);
  110:   curl_slist_free_all(resolve_list);
  111: 
  112:   return res;
  113: }
  114: 
  115: int test(char *URL)
  116: {
  117:   CURLM *multi = NULL;
  118:   int res = 0;
  119:   char *address = libtest_arg2;
  120:   char *port = libtest_arg3;
  121:   char *path = URL;
  122:   char dns_entry[256];
  123:   int i;
  124:   int count = 2;
  125: 
  126:   msnprintf(dns_entry, sizeof(dns_entry), "testserver.example.com:%s:%s",
  127:             port, address);
  128: 
  129:   start_test_timing();
  130: 
  131:   global_init(CURL_GLOBAL_ALL);
  132:   multi_init(multi);
  133: 
  134:   for(i = 1; i <= count; i++) {
  135:     char target_url[256];
  136:     msnprintf(target_url, sizeof(target_url),
  137:               "http://testserver.example.com:%s/%s%04d", port, path, i);
  138: 
  139:     /* second request must succeed like the first one */
  140:     res = do_one_request(multi, target_url, dns_entry);
  141:     if(res)
  142:       goto test_cleanup;
  143: 
  144:     if(i < count)
  145:       sleep(DNS_TIMEOUT + 1);
  146:   }
  147: 
  148: test_cleanup:
  149: 
  150:   curl_multi_cleanup(multi);
  151:   curl_global_cleanup();
  152: 
  153:   return (int) res;
  154: }