1 /***************************************************************************
2 * _ _ ____ _
3 * Project ___| | | | _ \| |
4 * / __| | | | |_) | |
5 * | (__| |_| | _ <| |___
6 * \___|\___/|_| \_\_____|
7 *
8 * Copyright (C) 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.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 * SPDX-License-Identifier: curl
22 *
23 ***************************************************************************/
24
25 /*
26 * Check for bugs #1303 and #1327: libcurl should never remove DNS entries
27 * created via CURLOPT_RESOLVE, neither after DNS_CACHE_TIMEOUT elapses
28 * (test1515) nor a dead connection is detected (test1616).
29 */
30
31 #include "test.h"
32 #include "testutil.h"
33 #include "warnless.h"
34 #include "memdebug.h"
35
36 #define TEST_HANG_TIMEOUT 60 * 1000
37
38 #define DNS_TIMEOUT 1
39
debug_callback(CURL * curl,curl_infotype info,char * msg,size_t len,void * ptr)40 static int debug_callback(CURL *curl, curl_infotype info, char *msg,
41 size_t len, void *ptr)
42 {
43 (void)curl;
44 (void)ptr;
45
46 if(info == CURLINFO_TEXT)
47 fprintf(stderr, "debug: %.*s", (int) len, msg);
48
49 return 0;
50 }
51
do_one_request(CURLM * m,char * URL,char * resolve)52 static CURLcode do_one_request(CURLM *m, char *URL, char *resolve)
53 {
54 CURL *curls;
55 struct curl_slist *resolve_list = NULL;
56 int still_running;
57 CURLcode res = CURLE_OK;
58 CURLMsg *msg;
59 int msgs_left;
60
61 resolve_list = curl_slist_append(resolve_list, resolve);
62
63 easy_init(curls);
64
65 easy_setopt(curls, CURLOPT_URL, URL);
66 easy_setopt(curls, CURLOPT_RESOLVE, resolve_list);
67 easy_setopt(curls, CURLOPT_DEBUGFUNCTION, debug_callback);
68 easy_setopt(curls, CURLOPT_VERBOSE, 1);
69 easy_setopt(curls, CURLOPT_DNS_CACHE_TIMEOUT, DNS_TIMEOUT);
70
71 multi_add_handle(m, curls);
72 multi_perform(m, &still_running);
73
74 abort_on_test_timeout();
75
76 while(still_running) {
77 struct timeval timeout;
78 fd_set fdread, fdwrite, fdexcep;
79 int maxfd = -99;
80
81 FD_ZERO(&fdread);
82 FD_ZERO(&fdwrite);
83 FD_ZERO(&fdexcep);
84 timeout.tv_sec = 1;
85 timeout.tv_usec = 0;
86
87 multi_fdset(m, &fdread, &fdwrite, &fdexcep, &maxfd);
88 select_test(maxfd + 1, &fdread, &fdwrite, &fdexcep, &timeout);
89
90 abort_on_test_timeout();
91 multi_perform(m, &still_running);
92
93 abort_on_test_timeout();
94 }
95
96 do {
97 msg = curl_multi_info_read(m, &msgs_left);
98 if(msg && msg->msg == CURLMSG_DONE && msg->easy_handle == curls) {
99 res = msg->data.result;
100 break;
101 }
102 } while(msg);
103
104 test_cleanup:
105
106 curl_multi_remove_handle(m, curls);
107 curl_easy_cleanup(curls);
108 curl_slist_free_all(resolve_list);
109
110 return res;
111 }
112
test(char * URL)113 CURLcode test(char *URL)
114 {
115 CURLM *multi = NULL;
116 CURLcode res = CURLE_OK;
117 char *address = libtest_arg2;
118 char *port = libtest_arg3;
119 char *path = URL;
120 char dns_entry[256];
121 int i;
122 int count = 2;
123
124 msnprintf(dns_entry, sizeof(dns_entry), "testserver.example.com:%s:%s",
125 port, address);
126
127 start_test_timing();
128
129 global_init(CURL_GLOBAL_ALL);
130 multi_init(multi);
131
132 for(i = 1; i <= count; i++) {
133 char target_url[256];
134 msnprintf(target_url, sizeof(target_url),
135 "http://testserver.example.com:%s/%s%04d", port, path, i);
136
137 /* second request must succeed like the first one */
138 res = do_one_request(multi, target_url, dns_entry);
139 if(res != CURLE_OK) {
140 goto test_cleanup;
141 }
142
143 if(i < count)
144 sleep(DNS_TIMEOUT + 1);
145 }
146
147 test_cleanup:
148
149 curl_multi_cleanup(multi);
150 curl_global_cleanup();
151
152 return res;
153 }
154
