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      1 /***************************************************************************
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      3  *  Project                     ___| | | |  _ \| |
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      5  *                            | (__| |_| |  _ <| |___
      6  *                             \___|\___/|_| \_\_____|
      7  *
      8  * Copyright (C) 1998 - 2016, Daniel Stenberg, <daniel (at) 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 "test.h"
     23 
     24 #include <fcntl.h>
     25 
     26 #include "testutil.h"
     27 #include "warnless.h"
     28 #include "memdebug.h"
     29 
     30 #define TEST_HANG_TIMEOUT 30 * 1000
     31 
     32 /* 500 milliseconds allowed. An extreme number but lets be really conservative
     33    to allow old and slow machines to run this test too */
     34 #define MAX_BLOCKED_TIME_US 500000
     35 
     36 /* return the number of microseconds between two time stamps */
     37 static int elapsed(struct timeval *before,
     38                    struct timeval *after)
     39 {
     40   ssize_t result;
     41 
     42   result = (after->tv_sec - before->tv_sec) * 1000000 +
     43     after->tv_usec - before->tv_usec;
     44   if(result < 0)
     45     result = 0;
     46 
     47   return curlx_sztosi(result);
     48 }
     49 
     50 
     51 int test(char *URL)
     52 {
     53   CURL *handle = NULL;
     54   CURLM *mhandle = NULL;
     55   int res = 0;
     56   int still_running = 0;
     57 
     58   start_test_timing();
     59 
     60   global_init(CURL_GLOBAL_ALL);
     61 
     62   easy_init(handle);
     63 
     64   easy_setopt(handle, CURLOPT_URL, URL);
     65   easy_setopt(handle, CURLOPT_VERBOSE, 1L);
     66 
     67   multi_init(mhandle);
     68 
     69   multi_add_handle(mhandle, handle);
     70 
     71   multi_perform(mhandle, &still_running);
     72 
     73   abort_on_test_timeout();
     74 
     75   while(still_running) {
     76     struct timeval timeout;
     77     fd_set fdread;
     78     fd_set fdwrite;
     79     fd_set fdexcep;
     80     int maxfd = -99;
     81     struct timeval before;
     82     struct timeval after;
     83     int e;
     84 
     85     timeout.tv_sec = 0;
     86     timeout.tv_usec = 100000L; /* 100 ms */
     87 
     88     FD_ZERO(&fdread);
     89     FD_ZERO(&fdwrite);
     90     FD_ZERO(&fdexcep);
     91 
     92     multi_fdset(mhandle, &fdread, &fdwrite, &fdexcep, &maxfd);
     93 
     94     /* At this point, maxfd is guaranteed to be greater or equal than -1. */
     95 
     96     select_test(maxfd+1, &fdread, &fdwrite, &fdexcep, &timeout);
     97 
     98     abort_on_test_timeout();
     99 
    100     fprintf(stderr, "ping\n");
    101     before = tutil_tvnow();
    102 
    103     multi_perform(mhandle, &still_running);
    104 
    105     abort_on_test_timeout();
    106 
    107     after = tutil_tvnow();
    108     e = elapsed(&before, &after);
    109     fprintf(stderr, "pong = %d\n", e);
    110 
    111     if(e > MAX_BLOCKED_TIME_US) {
    112       res = 100;
    113       break;
    114     }
    115   }
    116 
    117 test_cleanup:
    118 
    119   /* undocumented cleanup sequence - type UA */
    120 
    121   curl_multi_cleanup(mhandle);
    122   curl_easy_cleanup(handle);
    123   curl_global_cleanup();
    124 
    125   return res;
    126 }
    127