net/tools/quic/quic_time_wait_list_manager_test.cc

   1 // Copyright 2013 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "net/tools/quic/quic_time_wait_list_manager.h"
   6
   7 #include <errno.h>
   8
   9 #include "net/quic/crypto/crypto_protocol.h"
  10 #include "net/quic/crypto/null_encrypter.h"
  11 #include "net/quic/crypto/quic_decrypter.h"
  12 #include "net/quic/crypto/quic_encrypter.h"
  13 #include "net/quic/quic_connection_helper.h"
  14 #include "net/quic/quic_data_reader.h"
  15 #include "net/quic/quic_flags.h"
  16 #include "net/quic/quic_framer.h"
  17 #include "net/quic/quic_packet_writer.h"
  18 #include "net/quic/quic_protocol.h"
  19 #include "net/quic/quic_utils.h"
  20 #include "net/quic/test_tools/quic_test_utils.h"
  21 #include "net/tools/quic/quic_epoll_connection_helper.h"
  22 #include "net/tools/quic/test_tools/mock_epoll_server.h"
  23 #include "net/tools/quic/test_tools/quic_test_utils.h"
  24 #include "testing/gmock/include/gmock/gmock.h"
  25 #include "testing/gtest/include/gtest/gtest.h"
  26
  27 using net::test::BuildUnsizedDataPacket;
  28 using net::test::NoOpFramerVisitor;
  29 using net::test::QuicVersionMax;
  30 using net::test::QuicVersionMin;
  31 using net::test::ValueRestore;
  32 using testing::Args;
  33 using testing::Assign;
  34 using testing::DoAll;
  35 using testing::Matcher;
  36 using testing::MatcherInterface;
  37 using testing::NiceMock;
  38 using testing::Return;
  39 using testing::ReturnPointee;
  40 using testing::SetArgPointee;
  41 using testing::StrictMock;
  42 using testing::Truly;
  43 using testing::_;
  44
  45 namespace net {
  46 namespace tools {
  47 namespace test {
  48
  49 class FramerVisitorCapturingPublicReset : public NoOpFramerVisitor {
  50  public:
  51   FramerVisitorCapturingPublicReset() {}
  52   ~FramerVisitorCapturingPublicReset() override {}
  53
  54   void OnPublicResetPacket(const QuicPublicResetPacket& public_reset) override {
  55     public_reset_packet_ = public_reset;
  56   }
  57
  58   const QuicPublicResetPacket public_reset_packet() {
  59     return public_reset_packet_;
  60   }
  61
  62  private:
  63   QuicPublicResetPacket public_reset_packet_;
  64 };
  65
  66 class QuicTimeWaitListManagerPeer {
  67  public:
  68   static bool ShouldSendResponse(QuicTimeWaitListManager* manager,
  69                                  int received_packet_count) {
  70     return manager->ShouldSendResponse(received_packet_count);
  71   }
  72
  73   static QuicTime::Delta time_wait_period(QuicTimeWaitListManager* manager) {
  74     return manager->time_wait_period_;
  75   }
  76
  77   static QuicVersion GetQuicVersionFromConnectionId(
  78       QuicTimeWaitListManager* manager,
  79       QuicConnectionId connection_id) {
  80     return manager->GetQuicVersionFromConnectionId(connection_id);
  81   }
  82 };
  83
  84 namespace {
  85
  86 class MockFakeTimeEpollServer : public FakeTimeEpollServer {
  87  public:
  88   MOCK_METHOD2(RegisterAlarm, void(int64 timeout_in_us,
  89                                    EpollAlarmCallbackInterface* alarm));
  90 };
  91
  92 class QuicTimeWaitListManagerTest : public ::testing::Test {
  93  protected:
  94   QuicTimeWaitListManagerTest()
  95       : helper_(&epoll_server_),
  96         time_wait_list_manager_(&writer_,
  97                                 &visitor_,
  98                                 &helper_,
  99                                 QuicSupportedVersions()),
 100         framer_(QuicSupportedVersions(),
 101                 QuicTime::Zero(),
 102                 Perspective::IS_SERVER),
 103         connection_id_(45),
 104         client_address_(net::test::TestPeerIPAddress(), kTestPort),
 105         writer_is_blocked_(false) {}
 106
 107   ~QuicTimeWaitListManagerTest() override {}
 108
 109   void SetUp() override {
 110     EXPECT_CALL(writer_, IsWriteBlocked())
 111         .WillRepeatedly(ReturnPointee(&writer_is_blocked_));
 112     EXPECT_CALL(writer_, IsWriteBlockedDataBuffered())
 113         .WillRepeatedly(Return(false));
 114   }
 115
 116   void AddConnectionId(QuicConnectionId connection_id) {
 117     AddConnectionId(connection_id, QuicVersionMax(), nullptr);
 118   }
 119
 120   void AddConnectionId(QuicConnectionId connection_id,
 121                        QuicVersion version,
 122                        QuicEncryptedPacket* packet) {
 123     time_wait_list_manager_.AddConnectionIdToTimeWait(
 124         connection_id, version, packet);
 125   }
 126
 127   bool IsConnectionIdInTimeWait(QuicConnectionId connection_id) {
 128     return time_wait_list_manager_.IsConnectionIdInTimeWait(connection_id);
 129   }
 130
 131   void ProcessPacket(QuicConnectionId connection_id,
 132                      QuicPacketSequenceNumber sequence_number) {
 133     QuicEncryptedPacket packet(nullptr, 0);
 134     time_wait_list_manager_.ProcessPacket(server_address_,
 135                                           client_address_,
 136                                           connection_id,
 137                                           sequence_number,
 138                                           packet);
 139   }
 140
 141   QuicEncryptedPacket* ConstructEncryptedPacket(
 142       EncryptionLevel level,
 143       QuicConnectionId connection_id,
 144       QuicPacketSequenceNumber sequence_number) {
 145     QuicPacketHeader header;
 146     header.public_header.connection_id = connection_id;
 147     header.public_header.connection_id_length = PACKET_8BYTE_CONNECTION_ID;
 148     header.public_header.version_flag = false;
 149     header.public_header.reset_flag = false;
 150     header.public_header.sequence_number_length = PACKET_6BYTE_SEQUENCE_NUMBER;
 151     header.packet_sequence_number = sequence_number;
 152     header.entropy_flag = false;
 153     header.entropy_hash = 0;
 154     header.fec_flag = false;
 155     header.is_in_fec_group = NOT_IN_FEC_GROUP;
 156     header.fec_group = 0;
 157     QuicStreamFrame stream_frame(1, false, 0, MakeIOVector("data"));
 158     QuicFrame frame(&stream_frame);
 159     QuicFrames frames;
 160     frames.push_back(frame);
 161     scoped_ptr<QuicPacket> packet(
 162         BuildUnsizedDataPacket(&framer_, header, frames));
 163     EXPECT_TRUE(packet != nullptr);
 164     QuicEncryptedPacket* encrypted = framer_.EncryptPacket(ENCRYPTION_NONE,
 165                                                            sequence_number,
 166                                                            *packet);
 167     EXPECT_TRUE(encrypted != nullptr);
 168     return encrypted;
 169   }
 170
 171   NiceMock<MockFakeTimeEpollServer> epoll_server_;
 172   QuicEpollConnectionHelper helper_;
 173   StrictMock<MockPacketWriter> writer_;
 174   StrictMock<MockQuicServerSessionVisitor> visitor_;
 175   QuicTimeWaitListManager time_wait_list_manager_;
 176   QuicFramer framer_;
 177   QuicConnectionId connection_id_;
 178   IPEndPoint server_address_;
 179   IPEndPoint client_address_;
 180   bool writer_is_blocked_;
 181 };
 182
 183 class ValidatePublicResetPacketPredicate
 184     : public MatcherInterface<const std::tr1::tuple<const char*, int> > {
 185  public:
 186   explicit ValidatePublicResetPacketPredicate(QuicConnectionId connection_id,
 187                                               QuicPacketSequenceNumber number)
 188       : connection_id_(connection_id), sequence_number_(number) {
 189   }
 190
 191   virtual bool MatchAndExplain(
 192       const std::tr1::tuple<const char*, int> packet_buffer,
 193       testing::MatchResultListener* /* listener */) const override {
 194     FramerVisitorCapturingPublicReset visitor;
 195     QuicFramer framer(QuicSupportedVersions(), QuicTime::Zero(),
 196                       Perspective::IS_CLIENT);
 197     framer.set_visitor(&visitor);
 198     QuicEncryptedPacket encrypted(std::tr1::get<0>(packet_buffer),
 199                                   std::tr1::get<1>(packet_buffer));
 200     framer.ProcessPacket(encrypted);
 201     QuicPublicResetPacket packet = visitor.public_reset_packet();
 202     return connection_id_ == packet.public_header.connection_id &&
 203         packet.public_header.reset_flag && !packet.public_header.version_flag &&
 204         sequence_number_ == packet.rejected_sequence_number &&
 205         net::test::TestPeerIPAddress() == packet.client_address.address() &&
 206         kTestPort == packet.client_address.port();
 207   }
 208
 209   virtual void DescribeTo(::std::ostream* os) const override {}
 210
 211   virtual void DescribeNegationTo(::std::ostream* os) const override {}
 212
 213  private:
 214   QuicConnectionId connection_id_;
 215   QuicPacketSequenceNumber sequence_number_;
 216 };
 217
 218
 219 Matcher<const std::tr1::tuple<const char*, int> > PublicResetPacketEq(
 220     QuicConnectionId connection_id,
 221     QuicPacketSequenceNumber sequence_number) {
 222   return MakeMatcher(new ValidatePublicResetPacketPredicate(connection_id,
 223                                                             sequence_number));
 224 }
 225
 226 TEST_F(QuicTimeWaitListManagerTest, CheckConnectionIdInTimeWait) {
 227   EXPECT_FALSE(IsConnectionIdInTimeWait(connection_id_));
 228   EXPECT_CALL(visitor_, OnConnectionAddedToTimeWaitList(connection_id_));
 229   AddConnectionId(connection_id_);
 230   EXPECT_EQ(1u, time_wait_list_manager_.num_connections());
 231   EXPECT_TRUE(IsConnectionIdInTimeWait(connection_id_));
 232 }
 233
 234 TEST_F(QuicTimeWaitListManagerTest, SendConnectionClose) {
 235   const size_t kConnectionCloseLength = 100;
 236   EXPECT_CALL(visitor_, OnConnectionAddedToTimeWaitList(connection_id_));
 237   AddConnectionId(
 238       connection_id_,
 239       QuicVersionMax(),
 240       new QuicEncryptedPacket(
 241           new char[kConnectionCloseLength], kConnectionCloseLength, true));
 242   const int kRandomSequenceNumber = 1;
 243   EXPECT_CALL(writer_, WritePacket(_, kConnectionCloseLength,
 244                                    server_address_.address(),
 245                                    client_address_))
 246       .WillOnce(Return(WriteResult(WRITE_STATUS_OK, 1)));
 247
 248   ProcessPacket(connection_id_, kRandomSequenceNumber);
 249 }
 250
 251 TEST_F(QuicTimeWaitListManagerTest, SendPublicReset) {
 252   EXPECT_CALL(visitor_, OnConnectionAddedToTimeWaitList(connection_id_));
 253   AddConnectionId(connection_id_);
 254   const int kRandomSequenceNumber = 1;
 255   EXPECT_CALL(writer_, WritePacket(_, _,
 256                                    server_address_.address(),
 257                                    client_address_))
 258       .With(Args<0, 1>(PublicResetPacketEq(connection_id_,
 259                                            kRandomSequenceNumber)))
 260       .WillOnce(Return(WriteResult(WRITE_STATUS_OK, 0)));
 261
 262   ProcessPacket(connection_id_, kRandomSequenceNumber);
 263 }
 264
 265 TEST_F(QuicTimeWaitListManagerTest, SendPublicResetWithExponentialBackOff) {
 266   EXPECT_CALL(visitor_, OnConnectionAddedToTimeWaitList(connection_id_));
 267   AddConnectionId(connection_id_);
 268   EXPECT_EQ(1u, time_wait_list_manager_.num_connections());
 269   for (int sequence_number = 1; sequence_number < 101; ++sequence_number) {
 270     if ((sequence_number & (sequence_number - 1)) == 0) {
 271       EXPECT_CALL(writer_, WritePacket(_, _, _, _))
 272           .WillOnce(Return(WriteResult(WRITE_STATUS_OK, 1)));
 273     }
 274     ProcessPacket(connection_id_, sequence_number);
 275     // Send public reset with exponential back off.
 276     if ((sequence_number & (sequence_number - 1)) == 0) {
 277       EXPECT_TRUE(QuicTimeWaitListManagerPeer::ShouldSendResponse(
 278                       &time_wait_list_manager_, sequence_number));
 279     } else {
 280       EXPECT_FALSE(QuicTimeWaitListManagerPeer::ShouldSendResponse(
 281                        &time_wait_list_manager_, sequence_number));
 282     }
 283   }
 284 }
 285
 286 TEST_F(QuicTimeWaitListManagerTest, CleanUpOldConnectionIds) {
 287   const size_t kConnectionIdCount = 100;
 288   const size_t kOldConnectionIdCount = 31;
 289
 290   // Add connection_ids such that their expiry time is time_wait_period_.
 291   epoll_server_.set_now_in_usec(0);
 292   for (size_t connection_id = 1; connection_id <= kOldConnectionIdCount;
 293        ++connection_id) {
 294     EXPECT_CALL(visitor_, OnConnectionAddedToTimeWaitList(connection_id));
 295     AddConnectionId(connection_id);
 296   }
 297   EXPECT_EQ(kOldConnectionIdCount, time_wait_list_manager_.num_connections());
 298
 299   // Add remaining connection_ids such that their add time is
 300   // 2 * time_wait_period_.
 301   const QuicTime::Delta time_wait_period =
 302       QuicTimeWaitListManagerPeer::time_wait_period(&time_wait_list_manager_);
 303   epoll_server_.set_now_in_usec(time_wait_period.ToMicroseconds());
 304   for (size_t connection_id = kOldConnectionIdCount + 1;
 305        connection_id <= kConnectionIdCount; ++connection_id) {
 306     EXPECT_CALL(visitor_, OnConnectionAddedToTimeWaitList(connection_id));
 307     AddConnectionId(connection_id);
 308   }
 309   EXPECT_EQ(kConnectionIdCount, time_wait_list_manager_.num_connections());
 310
 311   QuicTime::Delta offset = QuicTime::Delta::FromMicroseconds(39);
 312   // Now set the current time as time_wait_period + offset usecs.
 313   epoll_server_.set_now_in_usec(time_wait_period.Add(offset).ToMicroseconds());
 314   // After all the old connection_ids are cleaned up, check the next alarm
 315   // interval.
 316   int64 next_alarm_time = epoll_server_.ApproximateNowInUsec() +
 317       time_wait_period.Subtract(offset).ToMicroseconds();
 318   EXPECT_CALL(epoll_server_, RegisterAlarm(next_alarm_time, _));
 319
 320   for (size_t connection_id = 1; connection_id <= kConnectionIdCount;
 321        ++connection_id) {
 322     if (connection_id <= kOldConnectionIdCount) {
 323       EXPECT_CALL(visitor_, OnConnectionRemovedFromTimeWaitList(connection_id));
 324     }
 325   }
 326   time_wait_list_manager_.CleanUpOldConnectionIds();
 327   for (size_t connection_id = 1; connection_id <= kConnectionIdCount;
 328        ++connection_id) {
 329     EXPECT_EQ(connection_id > kOldConnectionIdCount,
 330               IsConnectionIdInTimeWait(connection_id))
 331         << "kOldConnectionIdCount: " << kOldConnectionIdCount
 332         << " connection_id: " <<  connection_id;
 333   }
 334   EXPECT_EQ(kConnectionIdCount - kOldConnectionIdCount,
 335             time_wait_list_manager_.num_connections());
 336 }
 337
 338 TEST_F(QuicTimeWaitListManagerTest, SendQueuedPackets) {
 339   QuicConnectionId connection_id = 1;
 340   EXPECT_CALL(visitor_, OnConnectionAddedToTimeWaitList(connection_id));
 341   AddConnectionId(connection_id);
 342   QuicPacketSequenceNumber sequence_number = 234;
 343   scoped_ptr<QuicEncryptedPacket> packet(ConstructEncryptedPacket(
 344       ENCRYPTION_NONE, connection_id, sequence_number));
 345   // Let first write through.
 346   EXPECT_CALL(writer_, WritePacket(_, _,
 347                                    server_address_.address(),
 348                                    client_address_))
 349       .With(Args<0, 1>(PublicResetPacketEq(connection_id,
 350                                            sequence_number)))
 351       .WillOnce(Return(WriteResult(WRITE_STATUS_OK, packet->length())));
 352   ProcessPacket(connection_id, sequence_number);
 353
 354   // write block for the next packet.
 355   EXPECT_CALL(writer_, WritePacket(_, _,
 356                                    server_address_.address(),
 357                                    client_address_))
 358       .With(Args<0, 1>(PublicResetPacketEq(connection_id,
 359                                            sequence_number)))
 360       .WillOnce(DoAll(
 361           Assign(&writer_is_blocked_, true),
 362           Return(WriteResult(WRITE_STATUS_BLOCKED, EAGAIN))));
 363   EXPECT_CALL(visitor_, OnWriteBlocked(&time_wait_list_manager_));
 364   ProcessPacket(connection_id, sequence_number);
 365   // 3rd packet. No public reset should be sent;
 366   ProcessPacket(connection_id, sequence_number);
 367
 368   // write packet should not be called since we are write blocked but the
 369   // should be queued.
 370   QuicConnectionId other_connection_id = 2;
 371   EXPECT_CALL(visitor_, OnConnectionAddedToTimeWaitList(other_connection_id));
 372   AddConnectionId(other_connection_id);
 373   QuicPacketSequenceNumber other_sequence_number = 23423;
 374   scoped_ptr<QuicEncryptedPacket> other_packet(
 375       ConstructEncryptedPacket(
 376           ENCRYPTION_NONE, other_connection_id, other_sequence_number));
 377   EXPECT_CALL(writer_, WritePacket(_, _, _, _))
 378       .Times(0);
 379   EXPECT_CALL(visitor_, OnWriteBlocked(&time_wait_list_manager_));
 380   ProcessPacket(other_connection_id, other_sequence_number);
 381   EXPECT_EQ(2u, time_wait_list_manager_.num_connections());
 382
 383   // Now expect all the write blocked public reset packets to be sent again.
 384   writer_is_blocked_ = false;
 385   EXPECT_CALL(writer_, WritePacket(_, _,
 386                                    server_address_.address(),
 387                                    client_address_))
 388       .With(Args<0, 1>(PublicResetPacketEq(connection_id,
 389                                            sequence_number)))
 390       .WillOnce(Return(WriteResult(WRITE_STATUS_OK, packet->length())));
 391   EXPECT_CALL(writer_, WritePacket(_, _,
 392                                    server_address_.address(),
 393                                    client_address_))
 394       .With(Args<0, 1>(PublicResetPacketEq(other_connection_id,
 395                                            other_sequence_number)))
 396       .WillOnce(Return(WriteResult(WRITE_STATUS_OK,
 397                                    other_packet->length())));
 398   time_wait_list_manager_.OnCanWrite();
 399 }
 400
 401 TEST_F(QuicTimeWaitListManagerTest, GetQuicVersionFromMap) {
 402   const int kConnectionId1 = 123;
 403   const int kConnectionId2 = 456;
 404   const int kConnectionId3 = 789;
 405
 406   EXPECT_CALL(visitor_, OnConnectionAddedToTimeWaitList(kConnectionId1));
 407   EXPECT_CALL(visitor_, OnConnectionAddedToTimeWaitList(kConnectionId2));
 408   EXPECT_CALL(visitor_, OnConnectionAddedToTimeWaitList(kConnectionId3));
 409   AddConnectionId(kConnectionId1, QuicVersionMin(), nullptr);
 410   AddConnectionId(kConnectionId2, QuicVersionMax(), nullptr);
 411   AddConnectionId(kConnectionId3, QuicVersionMax(), nullptr);
 412
 413   EXPECT_EQ(QuicVersionMin(),
 414             QuicTimeWaitListManagerPeer::GetQuicVersionFromConnectionId(
 415                 &time_wait_list_manager_, kConnectionId1));
 416   EXPECT_EQ(QuicVersionMax(),
 417             QuicTimeWaitListManagerPeer::GetQuicVersionFromConnectionId(
 418                 &time_wait_list_manager_, kConnectionId2));
 419   EXPECT_EQ(QuicVersionMax(),
 420             QuicTimeWaitListManagerPeer::GetQuicVersionFromConnectionId(
 421                 &time_wait_list_manager_, kConnectionId3));
 422 }
 423
 424 TEST_F(QuicTimeWaitListManagerTest, AddConnectionIdTwice) {
 425   // Add connection_ids such that their expiry time is time_wait_period_.
 426   epoll_server_.set_now_in_usec(0);
 427   EXPECT_CALL(visitor_, OnConnectionAddedToTimeWaitList(connection_id_));
 428   AddConnectionId(connection_id_);
 429   EXPECT_TRUE(IsConnectionIdInTimeWait(connection_id_));
 430   const size_t kConnectionCloseLength = 100;
 431   AddConnectionId(
 432       connection_id_,
 433       QuicVersionMax(),
 434       new QuicEncryptedPacket(
 435           new char[kConnectionCloseLength], kConnectionCloseLength, true));
 436   EXPECT_TRUE(IsConnectionIdInTimeWait(connection_id_));
 437   EXPECT_EQ(1u, time_wait_list_manager_.num_connections());
 438
 439   EXPECT_CALL(writer_, WritePacket(_,
 440                                    kConnectionCloseLength,
 441                                    server_address_.address(),
 442                                    client_address_))
 443       .WillOnce(Return(WriteResult(WRITE_STATUS_OK, 1)));
 444
 445   const int kRandomSequenceNumber = 1;
 446   ProcessPacket(connection_id_, kRandomSequenceNumber);
 447
 448   const QuicTime::Delta time_wait_period =
 449       QuicTimeWaitListManagerPeer::time_wait_period(&time_wait_list_manager_);
 450
 451   QuicTime::Delta offset = QuicTime::Delta::FromMicroseconds(39);
 452   // Now set the current time as time_wait_period + offset usecs.
 453   epoll_server_.set_now_in_usec(time_wait_period.Add(offset).ToMicroseconds());
 454   // After the connection_ids are cleaned up, check the next alarm interval.
 455   int64 next_alarm_time = epoll_server_.ApproximateNowInUsec() +
 456       time_wait_period.ToMicroseconds();
 457
 458   EXPECT_CALL(epoll_server_, RegisterAlarm(next_alarm_time, _));
 459   EXPECT_CALL(visitor_, OnConnectionRemovedFromTimeWaitList(connection_id_));
 460   time_wait_list_manager_.CleanUpOldConnectionIds();
 461   EXPECT_FALSE(IsConnectionIdInTimeWait(connection_id_));
 462   EXPECT_EQ(0u, time_wait_list_manager_.num_connections());
 463 }
 464
 465 TEST_F(QuicTimeWaitListManagerTest, ConnectionIdsOrderedByTime) {
 466   // Simple randomization: the values of connection_ids are swapped based on the
 467   // current seconds on the clock. If the container is broken, the test will be
 468   // 50% flaky.
 469   int odd_second = static_cast<int>(epoll_server_.ApproximateNowInUsec()) % 2;
 470   EXPECT_TRUE(odd_second == 0 || odd_second == 1);
 471   const QuicConnectionId connection_id1 = odd_second;
 472   const QuicConnectionId connection_id2 = 1 - odd_second;
 473
 474   // 1 will hash lower than 2, but we add it later. They should come out in the
 475   // add order, not hash order.
 476   epoll_server_.set_now_in_usec(0);
 477   EXPECT_CALL(visitor_, OnConnectionAddedToTimeWaitList(connection_id1));
 478   AddConnectionId(connection_id1);
 479   epoll_server_.set_now_in_usec(10);
 480   EXPECT_CALL(visitor_, OnConnectionAddedToTimeWaitList(connection_id2));
 481   AddConnectionId(connection_id2);
 482   EXPECT_EQ(2u, time_wait_list_manager_.num_connections());
 483
 484   const QuicTime::Delta time_wait_period =
 485       QuicTimeWaitListManagerPeer::time_wait_period(&time_wait_list_manager_);
 486   epoll_server_.set_now_in_usec(time_wait_period.ToMicroseconds() + 1);
 487
 488   EXPECT_CALL(epoll_server_, RegisterAlarm(_, _));
 489
 490   EXPECT_CALL(visitor_, OnConnectionRemovedFromTimeWaitList(connection_id1));
 491   time_wait_list_manager_.CleanUpOldConnectionIds();
 492   EXPECT_FALSE(IsConnectionIdInTimeWait(connection_id1));
 493   EXPECT_TRUE(IsConnectionIdInTimeWait(connection_id2));
 494   EXPECT_EQ(1u, time_wait_list_manager_.num_connections());
 495 }
 496
 497 TEST_F(QuicTimeWaitListManagerTest, MaxConnectionsTest) {
 498   // Basically, shut off time-based eviction.
 499   FLAGS_quic_time_wait_list_seconds = 10000000000;
 500   FLAGS_quic_time_wait_list_max_connections = 5;
 501
 502   QuicConnectionId current_connection_id = 0;
 503   // Add exactly the maximum number of connections
 504   for (int64 i = 0; i < FLAGS_quic_time_wait_list_max_connections; ++i) {
 505     ++current_connection_id;
 506     EXPECT_FALSE(IsConnectionIdInTimeWait(current_connection_id));
 507     EXPECT_CALL(visitor_,
 508                 OnConnectionAddedToTimeWaitList(current_connection_id));
 509     AddConnectionId(current_connection_id);
 510     EXPECT_EQ(current_connection_id, time_wait_list_manager_.num_connections());
 511     EXPECT_TRUE(IsConnectionIdInTimeWait(current_connection_id));
 512   }
 513
 514   // Now keep adding.  Since we're already at the max, every new connection-id
 515   // will evict the oldest one.
 516   for (int64 i = 0; i < FLAGS_quic_time_wait_list_max_connections; ++i) {
 517     ++current_connection_id;
 518     const QuicConnectionId id_to_evict =
 519         current_connection_id - FLAGS_quic_time_wait_list_max_connections;
 520     EXPECT_TRUE(IsConnectionIdInTimeWait(id_to_evict));
 521     EXPECT_FALSE(IsConnectionIdInTimeWait(current_connection_id));
 522     EXPECT_CALL(visitor_, OnConnectionRemovedFromTimeWaitList(id_to_evict));
 523     EXPECT_CALL(visitor_,
 524                 OnConnectionAddedToTimeWaitList(current_connection_id));
 525     AddConnectionId(current_connection_id);
 526     EXPECT_EQ(static_cast<size_t>(FLAGS_quic_time_wait_list_max_connections),
 527               time_wait_list_manager_.num_connections());
 528     EXPECT_FALSE(IsConnectionIdInTimeWait(id_to_evict));
 529     EXPECT_TRUE(IsConnectionIdInTimeWait(current_connection_id));
 530   }
 531 }
 532
 533 }  // namespace
 534 }  // namespace test
 535 }  // namespace tools
 536 }  // namespace net