1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
|
/* Exercise low-level query functions with different QTYPEs.
Copyright (C) 2016-2019 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<http://www.gnu.org/licenses/>. */
#include <resolv.h>
#include <string.h>
#include <support/check.h>
#include <support/check_nss.h>
#include <support/resolv_test.h>
#include <support/support.h>
#include <support/test-driver.h>
#include <support/xmemstream.h>
/* If ture, the response function will send the actual response packet
over TCP instead of UDP. */
static volatile bool force_tcp;
/* Send back a fake resource record matching the QTYPE. */
static void
response (const struct resolv_response_context *ctx,
struct resolv_response_builder *b,
const char *qname, uint16_t qclass, uint16_t qtype)
{
if (force_tcp && ctx->tcp)
{
resolv_response_init (b, (struct resolv_response_flags) { .tc = 1 });
resolv_response_add_question (b, qname, qclass, qtype);
return;
}
resolv_response_init (b, (struct resolv_response_flags) { });
resolv_response_add_question (b, qname, qclass, qtype);
resolv_response_section (b, ns_s_an);
resolv_response_open_record (b, qname, qclass, qtype, 0);
resolv_response_add_data (b, &qtype, sizeof (qtype));
resolv_response_close_record (b);
}
static const char domain[] = "www.example.com";
static int
wrap_res_query (int type, unsigned char *answer, int answer_length)
{
return res_query (domain, C_IN, type, answer, answer_length);
}
static int
wrap_res_search (int type, unsigned char *answer, int answer_length)
{
return res_query (domain, C_IN, type, answer, answer_length);
}
static int
wrap_res_querydomain (int type, unsigned char *answer, int answer_length)
{
return res_querydomain ("www", "example.com", C_IN, type,
answer, answer_length);
}
static int
wrap_res_send (int type, unsigned char *answer, int answer_length)
{
unsigned char buf[512];
int ret = res_mkquery (QUERY, domain, C_IN, type,
(const unsigned char *) "", 0, NULL,
buf, sizeof (buf));
if (type < 0 || type >= 65536)
{
/* res_mkquery fails for out-of-range record types. */
TEST_VERIFY_EXIT (ret == -1);
return -1;
}
TEST_VERIFY_EXIT (ret > 12); /* DNS header length. */
return res_send (buf, ret, answer, answer_length);
}
static int
wrap_res_nquery (int type, unsigned char *answer, int answer_length)
{
return res_nquery (&_res, domain, C_IN, type, answer, answer_length);
}
static int
wrap_res_nsearch (int type, unsigned char *answer, int answer_length)
{
return res_nquery (&_res, domain, C_IN, type, answer, answer_length);
}
static int
wrap_res_nquerydomain (int type, unsigned char *answer, int answer_length)
{
return res_nquerydomain (&_res, "www", "example.com", C_IN, type,
answer, answer_length);
}
static int
wrap_res_nsend (int type, unsigned char *answer, int answer_length)
{
unsigned char buf[512];
int ret = res_nmkquery (&_res, QUERY, domain, C_IN, type,
(const unsigned char *) "", 0, NULL,
buf, sizeof (buf));
if (type < 0 || type >= 65536)
{
/* res_mkquery fails for out-of-range record types. */
TEST_VERIFY_EXIT (ret == -1);
return -1;
}
TEST_VERIFY_EXIT (ret > 12); /* DNS header length. */
return res_nsend (&_res, buf, ret, answer, answer_length);
}
static void
test_function (const char *fname,
int (*func) (int type,
unsigned char *answer, int answer_length))
{
unsigned char buf[512];
for (int tcp = 0; tcp < 2; ++tcp)
{
force_tcp = tcp;
for (unsigned int type = 1; type <= 65535; ++type)
{
if (test_verbose)
printf ("info: sending QTYPE %d with %s (tcp=%d)\n",
type, fname, tcp);
int ret = func (type, buf, sizeof (buf));
if (ret != 47)
FAIL_EXIT1 ("%s tcp=%d qtype=%d return value %d",
fname,tcp, type, ret);
/* One question, one answer record. */
TEST_VERIFY (memcmp (buf + 4, "\0\1\0\1\0\0\0\0", 8) == 0);
/* Question section. */
static const char qname[] = "\3www\7example\3com";
size_t qname_length = sizeof (qname);
TEST_VERIFY (memcmp (buf + 12, qname, qname_length) == 0);
/* RDATA part of answer. */
uint16_t type16 = type;
TEST_VERIFY (memcmp (buf + ret - 2, &type16, sizeof (type16)) == 0);
}
}
TEST_VERIFY (func (-1, buf, sizeof (buf) == -1));
TEST_VERIFY (func (65536, buf, sizeof (buf) == -1));
}
static int
do_test (void)
{
struct resolv_redirect_config config =
{
.response_callback = response,
};
struct resolv_test *obj = resolv_test_start (config);
test_function ("res_query", &wrap_res_query);
test_function ("res_search", &wrap_res_search);
test_function ("res_querydomain", &wrap_res_querydomain);
test_function ("res_send", &wrap_res_send);
test_function ("res_nquery", &wrap_res_nquery);
test_function ("res_nsearch", &wrap_res_nsearch);
test_function ("res_nquerydomain", &wrap_res_nquerydomain);
test_function ("res_nsend", &wrap_res_nsend);
resolv_test_end (obj);
return 0;
}
#define TIMEOUT 300
#include <support/test-driver.c>
|
