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
|
#ifndef BOOST_TEST_DYN_LINK
#define BOOST_TEST_DYN_LINK
#endif
#define BOOST_TEST_NO_MAIN
#include <thread>
#include <boost/test/unit_test.hpp>
#include "dnsdist-rules.hh"
void checkParameterBound(const std::string& parameter, uint64_t value, size_t max);
void checkParameterBound(const std::string& parameter, uint64_t value, size_t max)
{
if (value > max) {
throw std::runtime_error("The value passed to " + parameter + " is too large, the maximum is " + std::to_string(max));
}
}
static DNSQuestion getDQ(const DNSName* providedName = nullptr)
{
static const DNSName qname("powerdns.com.");
static PacketBuffer packet(sizeof(dnsheader));
static InternalQueryState ids;
ids.origDest = ComboAddress("127.0.0.1:53");
ids.origRemote = ComboAddress("192.0.2.1:42");
ids.qname = providedName ? *providedName : qname;
ids.qtype = QType::A;
ids.qclass = QClass::IN;
ids.protocol = dnsdist::Protocol::DoUDP;
ids.queryRealTime.start();
DNSQuestion dq(ids, packet);
return dq;
}
BOOST_AUTO_TEST_SUITE(dnsdistluarules_cc)
BOOST_AUTO_TEST_CASE(test_MaxQPSIPRule) {
size_t maxQPS = 10;
size_t maxBurst = maxQPS;
unsigned int expiration = 300;
unsigned int cleanupDelay = 60;
unsigned int scanFraction = 10;
MaxQPSIPRule rule(maxQPS, maxBurst, 32, 64, expiration, cleanupDelay, scanFraction);
InternalQueryState ids;
ids.qname = DNSName("powerdns.com.");
ids.qtype = QType::A;
ids.qclass = QClass::IN;
ids.origDest = ComboAddress("127.0.0.1:53");
ids.origRemote = ComboAddress("192.0.2.1:42");
ids.protocol = dnsdist::Protocol::DoUDP;
ids.queryRealTime.start();
PacketBuffer packet(sizeof(dnsheader));
struct timespec expiredTime;
/* the internal QPS limiter does not use the real time */
gettime(&expiredTime);
DNSQuestion dq(ids, packet);
for (size_t idx = 0; idx < maxQPS; idx++) {
/* let's use different source ports, it shouldn't matter */
ids.origRemote = ComboAddress("192.0.2.1:" + std::to_string(idx));
BOOST_CHECK_EQUAL(rule.matches(&dq), false);
BOOST_CHECK_EQUAL(rule.getEntriesCount(), 1U);
}
/* maxQPS + 1, we should be blocked */
BOOST_CHECK_EQUAL(rule.matches(&dq), true);
BOOST_CHECK_EQUAL(rule.getEntriesCount(), 1U);
/* remove all entries that have not been updated since 'now' + 1,
so all of them */
expiredTime.tv_sec += 1;
rule.cleanup(expiredTime);
/* we should have been cleaned up */
BOOST_CHECK_EQUAL(rule.getEntriesCount(), 0U);
struct timespec beginInsertionTime;
gettime(&beginInsertionTime);
/* we should not be blocked anymore */
BOOST_CHECK_EQUAL(rule.matches(&dq), false);
/* and we be back */
BOOST_CHECK_EQUAL(rule.getEntriesCount(), 1U);
/* Let's insert a lot of different sources now */
for (size_t idxByte3 = 0; idxByte3 < 256; idxByte3++) {
for (size_t idxByte4 = 0; idxByte4 < 256; idxByte4++) {
ids.origRemote = ComboAddress("10.0." + std::to_string(idxByte3) + "." + std::to_string(idxByte4));
BOOST_CHECK_EQUAL(rule.matches(&dq), false);
}
}
struct timespec endInsertionTime;
gettime(&endInsertionTime);
/* don't forget the existing entry */
size_t total = 1 + 256 * 256;
BOOST_CHECK_EQUAL(rule.getEntriesCount(), total);
/* make sure all entries are still valid */
struct timespec notExpiredTime = beginInsertionTime;
notExpiredTime.tv_sec -= 1;
size_t scanned = 0;
auto removed = rule.cleanup(notExpiredTime, &scanned);
BOOST_CHECK_EQUAL(removed, 0U);
/* the first entry should still have been valid, we should not have scanned more */
BOOST_CHECK_EQUAL(scanned, rule.getNumberOfShards());
BOOST_CHECK_EQUAL(rule.getEntriesCount(), total);
/* make sure all entries are _not_ valid anymore */
expiredTime = endInsertionTime;
expiredTime.tv_sec += 1;
removed = rule.cleanup(expiredTime, &scanned);
BOOST_CHECK_EQUAL(removed, (total / scanFraction) + 1 + rule.getNumberOfShards());
/* we should not have scanned more than scanFraction */
BOOST_CHECK_EQUAL(scanned, removed);
BOOST_CHECK_EQUAL(rule.getEntriesCount(), total - removed);
rule.clear();
BOOST_CHECK_EQUAL(rule.getEntriesCount(), 0U);
removed = rule.cleanup(expiredTime, &scanned);
BOOST_CHECK_EQUAL(removed, 0U);
BOOST_CHECK_EQUAL(scanned, 0U);
}
BOOST_AUTO_TEST_CASE(test_poolOutstandingRule) {
auto dq = getDQ();
ServerPool sp{};
auto ds1 = std::make_shared<DownstreamState>(ComboAddress("192.0.2.1:53"));
auto ds2 = std::make_shared<DownstreamState>(ComboAddress("192.0.2.2:53"));
/* increase the outstanding count of both */
ds1->outstanding = 400;
ds2->outstanding = 30;
sp.addServer(ds1);
sp.addServer(ds2);
BOOST_CHECK_EQUAL(sp.poolLoad(), 400U + 30U);
auto localPool = g_pools.getCopy();
addServerToPool(localPool, "test", ds1);
addServerToPool(localPool, "test", ds2);
g_pools.setState(localPool);
PoolOutstandingRule pOR1("test", 10);
BOOST_CHECK_EQUAL(pOR1.matches(&dq), true);
PoolOutstandingRule pOR2("test", 1000);
BOOST_CHECK_EQUAL(pOR2.matches(&dq), false);
}
BOOST_AUTO_TEST_CASE(test_payloadSizeRule) {
auto dnsQuestion = getDQ();
{
PayloadSizeRule rule("equal", dnsQuestion.getData().size());
BOOST_CHECK_EQUAL(rule.matches(&dnsQuestion), true);
BOOST_CHECK_EQUAL(rule.toString(), "payload size is equal to " + std::to_string(dnsQuestion.getData().size()));
}
{
PayloadSizeRule rule("equal", dnsQuestion.getData().size() + 1);
BOOST_CHECK_EQUAL(rule.matches(&dnsQuestion), false);
}
{
PayloadSizeRule rule("greater", dnsQuestion.getData().size());
BOOST_CHECK_EQUAL(rule.matches(&dnsQuestion), false);
BOOST_CHECK_EQUAL(rule.toString(), "payload size is greater than " + std::to_string(dnsQuestion.getData().size()));
}
{
PayloadSizeRule rule("greater", dnsQuestion.getData().size() - 1);
BOOST_CHECK_EQUAL(rule.matches(&dnsQuestion), true);
}
{
PayloadSizeRule rule("smaller", dnsQuestion.getData().size());
BOOST_CHECK_EQUAL(rule.matches(&dnsQuestion), false);
BOOST_CHECK_EQUAL(rule.toString(), "payload size is smaller than " + std::to_string(dnsQuestion.getData().size()));
}
{
PayloadSizeRule rule("smaller", dnsQuestion.getData().size() + 1);
BOOST_CHECK_EQUAL(rule.matches(&dnsQuestion), true);
}
{
PayloadSizeRule rule("greaterOrEqual", dnsQuestion.getData().size());
BOOST_CHECK_EQUAL(rule.matches(&dnsQuestion), true);
BOOST_CHECK_EQUAL(rule.toString(), "payload size is equal to or greater than " + std::to_string(dnsQuestion.getData().size()));
}
{
PayloadSizeRule rule("greaterOrEqual", dnsQuestion.getData().size() - 1);
BOOST_CHECK_EQUAL(rule.matches(&dnsQuestion), true);
}
{
PayloadSizeRule rule("greaterOrEqual", dnsQuestion.getData().size() + 1);
BOOST_CHECK_EQUAL(rule.matches(&dnsQuestion), false);
}
{
PayloadSizeRule rule("smallerOrEqual", dnsQuestion.getData().size());
BOOST_CHECK_EQUAL(rule.matches(&dnsQuestion), true);
BOOST_CHECK_EQUAL(rule.toString(), "payload size is equal to or smaller than " + std::to_string(dnsQuestion.getData().size()));
}
{
PayloadSizeRule rule("smallerOrEqual", dnsQuestion.getData().size() + 1);
BOOST_CHECK_EQUAL(rule.matches(&dnsQuestion), true);
}
{
PayloadSizeRule rule("smallerOrEqual", dnsQuestion.getData().size() - 1);
BOOST_CHECK_EQUAL(rule.matches(&dnsQuestion), false);
}
BOOST_CHECK_THROW(PayloadSizeRule("invalid", 42U), std::runtime_error);
}
BOOST_AUTO_TEST_SUITE_END()
|
