1 files changed, 157 insertions, 0 deletions
diff --git a/test-dnsdistrules_cc.cc b/test-dnsdistrules_cc.cc
new file mode 100644
index 0000000..b636ea9
--- /dev/null
+++ b/test-dnsdistrules_cc.cc
@@ -0,0 +1,157 @@
+
+#define BOOST_TEST_DYN_LINK
+#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_SUITE_END()