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
186
187
188
189
190
191
192
193
194
195
|
/*
SSSD
test_iobuf - IO buffer tests
Copyright (C) 2016 Red Hat
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program 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 General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <stdio.h>
#include <fcntl.h>
#include <errno.h>
#include <stdlib.h>
#include <stdarg.h>
#include <string.h>
#include <stddef.h>
#include <setjmp.h>
#include <cmocka.h>
#include "util/sss_iobuf.h"
#include "util/util.h"
static void test_sss_iobuf_read(void **state)
{
errno_t ret;
uint8_t buffer[] = { 'H', 'e', 'l', 'l', 'o', ' ', 'w', 'o', 'r', 'l', 'd', 0 };
uint8_t readbuf[64] = { 0 };
size_t nread;
struct sss_iobuf *rb;
rb = sss_iobuf_init_readonly(NULL, buffer, sizeof(buffer));
assert_non_null(rb);
ret = sss_iobuf_read(rb, 5, readbuf, &nread);
assert_int_equal(ret, EOK);
/* There is enough data in the buffer */
assert_int_equal(nread, 5);
/* The data matches beginning of the buffer */
assert_int_equal(strncmp((const char *) readbuf, "Hello", 5), 0);
memset(readbuf, 0, sizeof(readbuf));
ret = sss_iobuf_read(rb, 3, readbuf, &nread);
assert_int_equal(ret, EOK);
/* There is enough data in the buffer */
assert_int_equal(nread, 3);
/* The data matches beginning of the buffer */
assert_int_equal(strncmp((const char *) readbuf, " wo", 3), 0);
/* Try to read more than the buffer has */
memset(readbuf, 0, sizeof(readbuf));
ret = sss_iobuf_read(rb, 10, readbuf, &nread);
/* This is not a fatal error */
assert_int_equal(ret, EOK);
/* We just see how much there was */
assert_int_equal(nread, 4);
/* And get the rest of the buffer back. readbuf includes trailing zero now */
assert_int_equal(strcmp((const char *) readbuf, "rld"), 0);
/* Reading a depleted buffer will just yield zero bytes read now */
ret = sss_iobuf_read(rb, 10, readbuf, &nread);
assert_int_equal(ret, EOK);
assert_int_equal(nread, 0);
/* Failure cases */
ret = sss_iobuf_read(NULL, 10, readbuf, &nread);
assert_int_equal(ret, EINVAL);
ret = sss_iobuf_read(rb, 10, NULL, &nread);
assert_int_equal(ret, EINVAL);
talloc_free(rb);
}
static void test_sss_iobuf_write(void **state)
{
struct sss_iobuf *wb;
struct sss_iobuf *rb;
size_t hwlen = sizeof("Hello world"); /* Includes trailing zero */
uint8_t readbuf[64];
size_t nread;
errno_t ret;
/* Exactly fill the capacity */
wb = sss_iobuf_init_empty(NULL, hwlen, hwlen);
assert_non_null(wb);
ret = sss_iobuf_write_len(wb,
(uint8_t *) discard_const("Hello world"),
sizeof("Hello world"));
assert_int_equal(ret, EOK);
rb = sss_iobuf_init_readonly(NULL,
sss_iobuf_get_data(wb),
sss_iobuf_get_len(wb));
talloc_free(wb);
assert_non_null(rb);
ret = sss_iobuf_read(rb, sizeof(readbuf), readbuf, &nread);
assert_int_equal(ret, EOK);
assert_int_equal(nread, hwlen);
assert_int_equal(strcmp((const char *) readbuf, "Hello world"), 0);
talloc_zfree(rb);
/* Overflow the capacity by one */
wb = sss_iobuf_init_empty(NULL, hwlen, hwlen);
assert_non_null(wb);
ret = sss_iobuf_write_len(wb,
(uint8_t *) discard_const("Hello world!"),
sizeof("Hello world!"));
assert_int_not_equal(ret, EOK);
talloc_zfree(wb);
/* Test resizing exactly up to capacity in several writes */
wb = sss_iobuf_init_empty(NULL, 2, hwlen);
assert_non_null(wb);
ret = sss_iobuf_write_len(wb,
(uint8_t *) discard_const("Hello "),
sizeof("Hello ")-1); /* Not the null byte now.. */
assert_int_equal(ret, EOK);
ret = sss_iobuf_write_len(wb,
(uint8_t *) discard_const("world"),
sizeof("world"));
assert_int_equal(ret, EOK);
rb = sss_iobuf_init_readonly(NULL,
sss_iobuf_get_data(wb),
sss_iobuf_get_len(wb));
talloc_free(wb);
assert_non_null(rb);
ret = sss_iobuf_read(rb, sizeof(readbuf), readbuf, &nread);
assert_int_equal(ret, EOK);
assert_int_equal(nread, hwlen);
assert_int_equal(strcmp((const char *) readbuf, "Hello world"), 0);
talloc_zfree(rb);
/* Overflow the capacity during a resize by one */
wb = sss_iobuf_init_empty(NULL, 2, hwlen);
assert_non_null(wb);
ret = sss_iobuf_write_len(wb,
(uint8_t *) discard_const("Hello "),
sizeof("Hello ")-1); /* Not the null byte now.. */
assert_int_equal(ret, EOK);
ret = sss_iobuf_write_len(wb,
(uint8_t *) discard_const("world!"),
sizeof("world!"));
assert_int_not_equal(ret, EOK);
talloc_zfree(wb);
/* Test allocating an unlimited buffer */
wb = sss_iobuf_init_empty(NULL, 2, 0);
assert_non_null(wb);
ret = sss_iobuf_write_len(wb,
(uint8_t *) discard_const("Hello "),
sizeof("Hello ")-1); /* Not the null byte now.. */
assert_int_equal(ret, EOK);
ret = sss_iobuf_write_len(wb,
(uint8_t *) discard_const("world"),
sizeof("world"));
assert_int_equal(ret, EOK);
rb = sss_iobuf_init_readonly(NULL,
sss_iobuf_get_data(wb),
sss_iobuf_get_len(wb));
talloc_free(wb);
assert_non_null(rb);
ret = sss_iobuf_read(rb, sizeof(readbuf), readbuf, &nread);
assert_int_equal(ret, EOK);
assert_int_equal(nread, hwlen);
assert_int_equal(strcmp((const char *) readbuf, "Hello world"), 0);
talloc_zfree(rb);
}
int main(void)
{
const struct CMUnitTest tests[] = {
cmocka_unit_test(test_sss_iobuf_read),
cmocka_unit_test(test_sss_iobuf_write),
};
return cmocka_run_group_tests(tests, NULL, NULL);
}
|
