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 #include "curlcheck.h"
25
26 #include "hostip.h"
27
28 #ifndef CURL_DISABLE_SHUFFLE_DNS
29
30 CURLcode Curl_shuffle_addr(struct Curl_easy *data,
31 struct Curl_addrinfo **addr);
32
33 #define NUM_ADDRS 8
34 static struct Curl_addrinfo addrs[NUM_ADDRS];
35
unit_setup(void)36 static CURLcode unit_setup(void)
37 {
38 int i;
39 for(i = 0; i < NUM_ADDRS - 1; i++) {
40 addrs[i].ai_next = &addrs[i + 1];
41 }
42
43 return CURLE_OK;
44 }
45
unit_stop(void)46 static void unit_stop(void)
47 {
48 curl_global_cleanup();
49 }
50
51 UNITTEST_START
52
53 int i;
54 CURLcode code;
55 struct Curl_addrinfo *addrhead = addrs;
56
57 struct Curl_easy *easy = curl_easy_init();
58 abort_unless(easy, "out of memory");
59
60 code = curl_easy_setopt(easy, CURLOPT_DNS_SHUFFLE_ADDRESSES, 1L);
61 abort_unless(code == CURLE_OK, "curl_easy_setopt failed");
62
63 /* Shuffle repeatedly and make sure that the list changes */
64 for(i = 0; i < 10; i++) {
65 if(CURLE_OK != Curl_shuffle_addr(easy, &addrhead))
66 break;
67 if(addrhead != addrs)
68 break;
69 }
70
71 curl_easy_cleanup(easy);
72 curl_global_cleanup();
73
74 abort_unless(addrhead != addrs, "addresses are not being reordered");
75
76 UNITTEST_STOP
77
78 #else
79 static CURLcode unit_setup(void)
80 {
81 return CURLE_OK;
82 }
83 static void unit_stop(void)
84 {
85 }
86 UNITTEST_START
87 UNITTEST_STOP
88
89 #endif
90
