1 /***************************************************************************
2  *                                  _   _ ____  _
3  *  Project                     ___| | | |  _ \| |
4  *                             / __| | | | |_) | |
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6  *                             \___|\___/|_| \_\_____|
7  *
8  * Copyright (C) 1998 - 2017, 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 "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_MS 500
35 
36 int test(char *URL)
37 {
38   CURL *handle = NULL;
39   CURLM *mhandle = NULL;
40   int res = 0;
41   int still_running = 0;
42 
43   start_test_timing();
44 
45   global_init(CURL_GLOBAL_ALL);
46 
47   easy_init(handle);
48 
49   easy_setopt(handle, CURLOPT_URL, URL);
50   easy_setopt(handle, CURLOPT_VERBOSE, 1L);
51 
52   multi_init(mhandle);
53 
54   multi_add_handle(mhandle, handle);
55 
56   multi_perform(mhandle, &still_running);
57 
58   abort_on_test_timeout();
59 
60   while(still_running) {
61     struct timeval timeout;
62     fd_set fdread;
63     fd_set fdwrite;
64     fd_set fdexcep;
65     int maxfd = -99;
66     struct timeval before;
67     struct timeval after;
68     long e;
69 
70     timeout.tv_sec = 0;
71     timeout.tv_usec = 100000L; /* 100 ms */
72 
73     FD_ZERO(&fdread);
74     FD_ZERO(&fdwrite);
75     FD_ZERO(&fdexcep);
76 
77     multi_fdset(mhandle, &fdread, &fdwrite, &fdexcep, &maxfd);
78 
79     /* At this point, maxfd is guaranteed to be greater or equal than -1. */
80 
81     select_test(maxfd + 1, &fdread, &fdwrite, &fdexcep, &timeout);
82 
83     abort_on_test_timeout();
84 
85     fprintf(stderr, "ping\n");
86     before = tutil_tvnow();
87 
88     multi_perform(mhandle, &still_running);
89 
90     abort_on_test_timeout();
91 
92     after = tutil_tvnow();
93     e = tutil_tvdiff(after, before);
94     fprintf(stderr, "pong = %ld\n", e);
95 
96     if(e > MAX_BLOCKED_TIME_MS) {
97       res = 100;
98       break;
99     }
100   }
101 
102 test_cleanup:
103 
104   /* undocumented cleanup sequence - type UA */
105 
106   curl_multi_cleanup(mhandle);
107   curl_easy_cleanup(handle);
108   curl_global_cleanup();
109 
110   return res;
111 }
112