]>
Commit | Line | Data |
---|---|---|
5840c75c | 1 | /* Test for __libc_res_nsend buffer mismanagent (bug 18665), UDP case. |
688903eb | 2 | Copyright (C) 2016-2018 Free Software Foundation, Inc. |
5840c75c FW |
3 | This file is part of the GNU C Library. |
4 | ||
5 | The GNU C Library is free software; you can redistribute it and/or | |
6 | modify it under the terms of the GNU Lesser General Public | |
7 | License as published by the Free Software Foundation; either | |
8 | version 2.1 of the License, or (at your option) any later version. | |
9 | ||
10 | The GNU C Library is distributed in the hope that it will be useful, | |
11 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
13 | Lesser General Public License for more details. | |
14 | ||
15 | You should have received a copy of the GNU Lesser General Public | |
16 | License along with the GNU C Library; if not, see | |
17 | <http://www.gnu.org/licenses/>. */ | |
18 | ||
19 | #include <errno.h> | |
20 | #include <netdb.h> | |
21 | #include <resolv.h> | |
22 | #include <stdio.h> | |
23 | #include <string.h> | |
24 | #include <support/check.h> | |
25 | #include <support/resolv_test.h> | |
26 | #include <support/xthread.h> | |
27 | ||
28 | static pthread_mutex_t lock = PTHREAD_MUTEX_INITIALIZER; | |
29 | ||
30 | static int initial_address_count; | |
31 | static int response_count; | |
32 | ||
33 | static void | |
34 | response (const struct resolv_response_context *ctx, | |
35 | struct resolv_response_builder *b, | |
36 | const char *qname, uint16_t qclass, uint16_t qtype) | |
37 | { | |
38 | TEST_VERIFY_EXIT (qname != NULL); | |
39 | struct resolv_response_flags flags = {}; | |
40 | resolv_response_init (b, flags); | |
41 | resolv_response_add_question (b, qname, qclass, qtype); | |
42 | ||
43 | resolv_response_section (b, ns_s_an); | |
44 | ||
45 | /* Add many A/AAAA records to the second response. */ | |
46 | int address_count; | |
47 | xpthread_mutex_lock (&lock); | |
48 | if (response_count == 0) | |
49 | address_count = initial_address_count; | |
50 | else | |
51 | address_count = 2000; | |
52 | ++response_count; | |
53 | xpthread_mutex_unlock (&lock); | |
54 | ||
55 | for (int i = 0; i < address_count; ++i) | |
56 | { | |
57 | resolv_response_open_record (b, qname, qclass, qtype, 0); | |
58 | switch (qtype) | |
59 | { | |
60 | case T_A: | |
61 | { | |
62 | char ipv4[4] = {10, i >> 8, i, 0}; | |
63 | ipv4[3] = 2 * ctx->tcp + 4 * ctx->server_index; | |
64 | resolv_response_add_data (b, &ipv4, sizeof (ipv4)); | |
65 | } | |
66 | break; | |
67 | case T_AAAA: | |
68 | { | |
69 | char ipv6[16] | |
70 | = {0x20, 0x01, 0xd, 0xb8, 0, 0, 0, 0, 0, 0, 0, 0, 0, | |
71 | i >> 8, i, 0}; | |
72 | ipv6[15] = 2 * ctx->tcp + 4 * ctx->server_index; | |
73 | resolv_response_add_data (b, &ipv6, sizeof (ipv6)); | |
74 | } | |
75 | break; | |
76 | default: | |
77 | support_record_failure (); | |
78 | printf ("error: unexpected QTYPE: %s/%u/%u\n", | |
79 | qname, qclass, qtype); | |
80 | } | |
81 | resolv_response_close_record (b); | |
82 | } | |
83 | } | |
84 | ||
85 | static void | |
86 | test_different_sizes (void) | |
87 | { | |
88 | struct addrinfo hints = { .ai_family = AF_UNSPEC, }; | |
89 | struct addrinfo *ai; | |
90 | int ret; | |
91 | ||
92 | /* This magic number produces a response size close to 2048 | |
93 | bytes. */ | |
94 | initial_address_count = 126; | |
95 | response_count = 0; | |
96 | ||
97 | ret = getaddrinfo ("www.example", "80", &hints, &ai); | |
98 | if (ret == 0) | |
99 | freeaddrinfo (ai); | |
100 | ||
101 | response_count = 0; | |
102 | ret = getaddrinfo ("www123.example", "80", &hints, &ai); | |
103 | if (ret == 0) | |
104 | freeaddrinfo (ai); | |
105 | ||
106 | response_count = 0; | |
107 | ret = getaddrinfo ("www1234.example", "80", &hints, &ai); | |
108 | if (ret == 0) | |
109 | freeaddrinfo (ai); | |
110 | ||
111 | response_count = 0; | |
112 | ret = getaddrinfo ("www12345.example", "80", &hints, &ai); | |
113 | if (ret == 0) | |
114 | freeaddrinfo (ai); | |
115 | } | |
116 | ||
117 | static int | |
118 | do_test (void) | |
119 | { | |
120 | struct resolv_test *obj = resolv_test_start | |
121 | ((struct resolv_redirect_config) | |
122 | { | |
123 | .response_callback = response | |
124 | }); | |
125 | ||
126 | test_different_sizes (); | |
127 | ||
128 | _res.options |= RES_SNGLKUP; | |
129 | test_different_sizes (); | |
130 | ||
131 | _res.options |= RES_SNGLKUPREOP; | |
132 | test_different_sizes (); | |
133 | ||
134 | resolv_test_end (obj); | |
135 | return 0; | |
136 | } | |
137 | ||
138 | #include <support/test-driver.c> |