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
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
|
/* Copyright (C) CZ.NIC, z.s.p.o. and contributors
* SPDX-License-Identifier: GPL-2.0-or-later
* For more information, see <https://www.knot-dns.cz/>
*/
#include <assert.h>
#include <tap/basic.h>
#include <sys/socket.h>
#include <sys/types.h>
#include <netdb.h>
#include "contrib/sockaddr.h"
#include "libknot/errcode.h"
#include "libknot/rrtype/opt.h"
#define GARBAGE_BYTE 0xdb
static void test_size(void)
{
struct test {
const char *msg;
size_t expected;
knot_edns_client_subnet_t ecs;
};
static struct test const TESTS[] = {
// invalid
{ "zero family", 0, { 0 } },
{ "zero family & source", 0, { 0, 1 } },
{ "unknown family", 0, { 42, 0 } },
{ "unknown family & source", 0, { 42, 1 } },
// IPv4 bit ops
{ "IPv4, zero source", 4, { 1 } },
{ "IPv4, 7 bits in last byte", 7, { 1, 23 } },
{ "IPv4, 8 bits in last byte", 7, { 1, 24 } },
{ "IPv4, 1 bit in last byte", 8, { 1, 25 } },
// IPv6 bit ops
{ "IPv6, zero source", 4, { 2 } },
{ "IPv6, 7 bits in last byte", 19, { 2, 113 } },
{ "IPv6, 8 bits in last byte", 19, { 2, 120 } },
{ "IPv6, 1 bit in last byte", 20, { 2, 121 } },
// sources
{ "IPv4, source < max", 8, { 1, 31 } },
{ "IPv4, source = max", 8, { 1, 32 } },
{ "IPv4, source > max", 0, { 1, 33 } },
// scopes
{ "IPv6, scope < source", 12, { 2, 64, 48 } },
{ "IPv6, scope = source", 20, { 2, 128, 128 } },
{ "IPv6, scope > max", 0, { 2, 128, 129 } },
{ NULL }
};
is_int(0, knot_edns_client_subnet_size(NULL), "%s: null", __func__);
for (struct test const *t = TESTS; t->msg != NULL; t++) {
int r = knot_edns_client_subnet_size(&t->ecs);
is_int(t->expected, r, "%s: %s", __func__, t->msg);
}
}
struct test_io {
const char *msg;
int expected;
size_t option_len;
const char *option;
knot_edns_client_subnet_t ecs;
};
static void test_write(void)
{
static struct test_io const TESTS[] = {
// invalid
{ "unset family", KNOT_EINVAL, 0, NULL, { 0 } },
{ "invalid family", KNOT_EINVAL, 0, NULL, { 3 } },
{ "small buffer", KNOT_ESPACE, 4, NULL, { 1, 1 } },
// IPv4 prefix
{ "IPv4, zero source", KNOT_EOK, 4, "\x00\x01\x00\x00", { 1 } },
{ "IPv4, 7 bits in LSB", KNOT_EOK, 6, "\x00\x01\x0f\x00\xff\xfe", { 1, 15, 0, "\xff\xff\xff\xff" } },
{ "IPv4, 8 bits in LSB", KNOT_EOK, 6, "\x00\x01\x10\x00\xff\xff", { 1, 16, 0, "\xff\xff\xff\xff" } },
{ "IPv4, 1 bit in LSB", KNOT_EOK, 7, "\x00\x01\x11\x00\xff\xff\x80", { 1, 17, 0, "\xff\xff\xff\xff" } },
{ "IPv4, source = max", KNOT_EOK, 8, "\x00\x01\x20\x00\xaa\xbb\xcc\xdd", { 1, 32, 0, "\xaa\xbb\xcc\xdd" } },
{ "IPv6, source > max", KNOT_EINVAL, 0, NULL, { 2, 129 } },
// IPv6 scope
{ "IPv6, scope < source", KNOT_EOK, 6, "\x00\x02\x10\x0e\xff\xff", { 2, 16, 14, "\xff\xff\xff\xff" } },
{ "IPv6, scope = source", KNOT_EOK, 6, "\x00\x02\x08\x08\xff", { 2, 8, 8, "\xff\xff\xff\xff" } },
{ "IPv6, scope > max", KNOT_EINVAL, 0, NULL, { 2, 128, 129 } },
// other
{ "larger buffer", KNOT_EOK, 7, "\x00\x01\x10\x0e\xff\xff\x00", { 1, 16, 14, "\xff\xff\xff\xff" } },
{ NULL }
};
for (struct test_io const *t = TESTS; t->msg != NULL; t++) {
uint8_t option[64];
assert(sizeof(option) >= t->option_len);
memset(option, GARBAGE_BYTE, sizeof(option));
int r = knot_edns_client_subnet_write(option, t->option_len, &t->ecs);
ok(r == t->expected &&
(t->expected != KNOT_EOK || memcmp(option, t->option, t->option_len) == 0),
"%s: %s", __func__, t->msg);
}
}
static void test_parse(void)
{
static struct test_io const TESTS[] = {
// invalid
{ "null", KNOT_EINVAL, 0, NULL },
{ "empty buffer", KNOT_EMALF, 0, "" },
{ "incomplete header", KNOT_EMALF, 3, "\x00\x01\x00" },
{ "incomplete source", KNOT_EMALF, 5, "\x00\x0a\x00\x00\xff\xff" },
{ "zero family", KNOT_EMALF, 4, "\x00\x00\x00\x00" },
{ "unknown family", KNOT_EMALF, 4, "\x00\x03\x00\x00" },
// IPv4 prefix
{ "IPv4, zero source", KNOT_EOK, 4, "\x00\x01\x00\x00", { 1 } },
{ "IPv4, 7 bits in LSB", KNOT_EOK, 6, "\x00\x01\x0f\x00\xff\xfe", { 1, 15, 0, "\xff\xfe" } },
{ "IPv4, 9 bits in LSB", KNOT_EOK, 6, "\x00\x01\x10\x00\xff\xff", { 1, 16, 0, "\xff\xff" } },
{ "IPv4, 1 bit in LSB", KNOT_EOK, 7, "\x00\x01\x11\x00\xff\xff\x80", { 1, 17, 0, "\xff\xff\x80" } },
{ "IPv4, source = max", KNOT_EOK, 8, "\x00\x01\x20\x00\xaa\xbb\xcc\xdd", { 1, 32, 0, "\xaa\xbb\xcc\xdd" } },
{ "IPv4, dirty source", KNOT_EOK, 8, "\x00\x01\x0b\x00\xff\xff\xff\xff", { 1, 11, 0, "\xff\xe0" } },
{ "IPv4, source > max", KNOT_EMALF, 9, "\x00\x01\x21\x00\xaa\xbb\xcc\xdd\xee" },
// IPv6 scope
{ "IPv6 scope < source", KNOT_EOK, 5, "\x00\x02\x07\x05\xff", { 2, 7, 5, "\xfe" } },
{ "IPv6 scope = source", KNOT_EOK, 5, "\x00\x02\x06\x06\xff", { 2, 6, 6, "\xfc" } },
{ "IPv6 scope > max", KNOT_EMALF, 5, "\x00\x02\x06\x81\xff" },
// extra buffer size
{ "extra space", KNOT_EOK, 6, "\x00\x01\x00\x00\xff\x00", { 1 } },
{ "extra space", KNOT_EOK, 6, "\x00\x01\x01\x00\xff\x00", { 1, 1, 0, "\x80" } },
{ NULL }
};
for (struct test_io const *t = TESTS; t->msg != NULL; t++) {
knot_edns_client_subnet_t ecs = { 0 };
memset(&ecs, GARBAGE_BYTE, sizeof(ecs));
int r = knot_edns_client_subnet_parse(&ecs, (uint8_t *)t->option, t->option_len);
ok(r == t->expected &&
(t->expected != KNOT_EOK || memcmp(&ecs, &t->ecs, sizeof(ecs)) == 0),
"%s: %s", __func__, t->msg);
}
}
static struct sockaddr_storage addr_init(const char *addr)
{
struct sockaddr_storage sa = { 0 };
struct addrinfo hints = { .ai_flags = AI_NUMERICHOST };
struct addrinfo *info = NULL;
int r = getaddrinfo(addr, NULL, &hints, &info);
(void)r;
assert(r == 0);
memcpy(&sa, info->ai_addr, info->ai_addrlen);
freeaddrinfo(info);
return sa;
}
static void test_set_address(void)
{
int r;
knot_edns_client_subnet_t ecs = { 0 };
struct sockaddr_storage ss = { 0 };
r = knot_edns_client_subnet_set_addr(NULL, &ss);
is_int(KNOT_EINVAL, r, "%s: missing ECS", __func__);
r = knot_edns_client_subnet_set_addr(&ecs, NULL);
is_int(KNOT_EINVAL, r, "%s: missing address", __func__);
memset(&ecs, GARBAGE_BYTE, sizeof(ecs));
ss = addr_init("198.51.100.42");
assert(ss.ss_family == AF_INET);
const uint8_t raw4[4] = { 198, 51, 100, 42 };
r = knot_edns_client_subnet_set_addr(&ecs, &ss);
ok(r == KNOT_EOK &&
ecs.family == 1 && ecs.source_len == 32 && ecs.scope_len == 0 &&
memcmp(ecs.address, raw4, sizeof(raw4)) == 0,
"%s: IPv4", __func__);
memset(&ecs, GARBAGE_BYTE, sizeof(ecs));
ss = addr_init("2001:db8::dead:beef");
assert(ss.ss_family == AF_INET6);
const uint8_t raw6[16] = "\x20\x01\x0d\xb8\x00\x00\x00\x00"
"\x00\x00\x00\x00\xde\xad\xbe\xef";
r = knot_edns_client_subnet_set_addr(&ecs, &ss);
ok(r == KNOT_EOK &&
ecs.family == 2 && ecs.source_len == 128 && ecs.scope_len == 0 &&
memcmp(ecs.address, raw6, sizeof(raw6)) == 0,
"%s: IPv6", __func__);
const struct sockaddr_storage ss_unix = { .ss_family = AF_UNIX };
r = knot_edns_client_subnet_set_addr(&ecs, &ss_unix);
is_int(KNOT_ENOTSUP, r, "%s: UNIX not supported", __func__);
}
static bool sockaddr_eq(const struct sockaddr_storage *a, const struct sockaddr_storage *b)
{
return sockaddr_cmp(a, b, true) == 0;
}
static void test_get_address(void)
{
struct test {
const char *msg;
int expected;
const char *addr_str;
knot_edns_client_subnet_t ecs;
};
static struct test const TESTS[] = {
// invalid
{ "unset family", KNOT_ENOTSUP, NULL, { 0 } },
{ "unknown family", KNOT_ENOTSUP, NULL, { 3 } },
// zero source
{ "IPv4, any", KNOT_EOK, "0.0.0.0", { 1 } },
{ "IPv6, any", KNOT_EOK, "::0" , { 2 } },
// IPv4
{ "IPv4, 7 bits in LSB", KNOT_EOK, "198.50.0.0", { 1, 15, 0, "\xc6\x33\xff\xff" } },
{ "IPv4, 8 bits in LSB", KNOT_EOK, "198.51.0.0", { 1, 16, 0, "\xc6\x33\xff\xff" } },
{ "IPv4, 1 bit in LSB", KNOT_EOK, "198.51.128.0", { 1, 17, 0, "\xc6\x33\xff\xff" } },
{ "IPv4, source = max", KNOT_EOK, "198.51.128.1", { 1, 32, 0, "\xc6\x33\x80\x01" } },
// IPv6
{ "IPv6, 7 bits in LSB", KNOT_EOK, "2001:db8:200::", { 2, 39, 0, "\x20\x01\x0d\xb8\x03\xff" } },
{ "IPv6, 8 bits in LSB", KNOT_EOK, "2001:db8:100::", { 2, 40, 0, "\x20\x01\x0d\xb8\x01\xff" } },
{ "IPv6, 1 bit in LSB", KNOT_EOK, "2001:db8:180::", { 2, 41, 0, "\x20\x01\x0d\xb8\x01\xff" } },
{ "IPv6, source = max", KNOT_EOK, "2001:db8::1", { 2, 128, 0, "\x20\x01\x0d\xb8\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x01" } },
{ NULL }
};
for (struct test const *t = TESTS; t->msg != NULL; t++) {
struct sockaddr_storage result = { 0 };
int r = knot_edns_client_subnet_get_addr(&result, &t->ecs);
bool valid = false;
if (t->expected == KNOT_EOK) {
struct sockaddr_storage addr = addr_init(t->addr_str);
assert(addr.ss_family != AF_UNSPEC);
valid = (r == t->expected && sockaddr_eq(&result, &addr));
} else {
valid = (r == t->expected);
}
ok(valid, "%s: %s", __func__, t->msg);
}
}
int main(int argc, char *argv[])
{
plan_lazy();
test_size();
test_write();
test_parse();
test_set_address();
test_get_address();
return 0;
}
|
