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#define BOOST_TEST_DYN_LINK
#define BOOST_TEST_NO_MAIN
#include <thread>
#include <boost/test/unit_test.hpp>
#include "dnsdist-rules.hh"
static DNSQuestion getDQ(const DNSName* providedName = nullptr)
{
static const DNSName qname("powerdns.com.");
static const ComboAddress lc("127.0.0.1:53");
static const ComboAddress rem("192.0.2.1:42");
static struct timespec queryRealTime;
static PacketBuffer packet(sizeof(dnsheader));
uint16_t qtype = QType::A;
uint16_t qclass = QClass::IN;
auto proto = dnsdist::Protocol::DoUDP;
gettime(&queryRealTime, true);
DNSQuestion dq(providedName ? providedName : &qname, qtype, qclass, &lc, &rem, packet, proto, &queryRealTime);
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);
DNSName qname("powerdns.com.");
uint16_t qtype = QType::A;
uint16_t qclass = QClass::IN;
ComboAddress lc("127.0.0.1:53");
ComboAddress rem("192.0.2.1:42");
PacketBuffer packet(sizeof(dnsheader));
auto proto = dnsdist::Protocol::DoUDP;
struct timespec queryRealTime;
gettime(&queryRealTime, true);
struct timespec expiredTime;
/* the internal QPS limiter does not use the real time */
gettime(&expiredTime);
DNSQuestion dq(&qname, qtype, qclass, &lc, &rem, packet, proto, &queryRealTime);
for (size_t idx = 0; idx < maxQPS; idx++) {
/* let's use different source ports, it shouldn't matter */
rem = 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++) {
rem = 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, 1U);
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);
/* 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_SUITE_END()
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