| // Copyright 2013 The Chromium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #include "quic/core/quic_time_wait_list_manager.h" |
| |
| #include <cerrno> |
| #include <memory> |
| #include <ostream> |
| #include <utility> |
| |
| #include "quic/core/crypto/crypto_protocol.h" |
| #include "quic/core/crypto/null_encrypter.h" |
| #include "quic/core/crypto/quic_decrypter.h" |
| #include "quic/core/crypto/quic_encrypter.h" |
| #include "quic/core/quic_connection_id.h" |
| #include "quic/core/quic_data_reader.h" |
| #include "quic/core/quic_framer.h" |
| #include "quic/core/quic_packet_writer.h" |
| #include "quic/core/quic_packets.h" |
| #include "quic/core/quic_utils.h" |
| #include "quic/platform/api/quic_expect_bug.h" |
| #include "quic/platform/api/quic_flags.h" |
| #include "quic/platform/api/quic_test.h" |
| #include "quic/test_tools/mock_quic_session_visitor.h" |
| #include "quic/test_tools/quic_test_utils.h" |
| #include "quic/test_tools/quic_time_wait_list_manager_peer.h" |
| |
| using testing::_; |
| using testing::Args; |
| using testing::Assign; |
| using testing::DoAll; |
| using testing::Matcher; |
| using testing::NiceMock; |
| using testing::Return; |
| using testing::ReturnPointee; |
| using testing::StrictMock; |
| using testing::Truly; |
| |
| namespace quic { |
| namespace test { |
| namespace { |
| |
| const size_t kTestPacketSize = 100; |
| |
| class FramerVisitorCapturingPublicReset : public NoOpFramerVisitor { |
| public: |
| FramerVisitorCapturingPublicReset(QuicConnectionId connection_id) |
| : connection_id_(connection_id) {} |
| ~FramerVisitorCapturingPublicReset() override = default; |
| |
| void OnPublicResetPacket(const QuicPublicResetPacket& public_reset) override { |
| public_reset_packet_ = public_reset; |
| } |
| |
| const QuicPublicResetPacket public_reset_packet() { |
| return public_reset_packet_; |
| } |
| |
| bool IsValidStatelessResetToken( |
| const StatelessResetToken& token) const override { |
| return token == QuicUtils::GenerateStatelessResetToken(connection_id_); |
| } |
| |
| void OnAuthenticatedIetfStatelessResetPacket( |
| const QuicIetfStatelessResetPacket& packet) override { |
| stateless_reset_packet_ = packet; |
| } |
| |
| const QuicIetfStatelessResetPacket stateless_reset_packet() { |
| return stateless_reset_packet_; |
| } |
| |
| private: |
| QuicPublicResetPacket public_reset_packet_; |
| QuicIetfStatelessResetPacket stateless_reset_packet_; |
| QuicConnectionId connection_id_; |
| }; |
| |
| class MockAlarmFactory; |
| class MockAlarm : public QuicAlarm { |
| public: |
| explicit MockAlarm(QuicArenaScopedPtr<Delegate> delegate, |
| int alarm_index, |
| MockAlarmFactory* factory) |
| : QuicAlarm(std::move(delegate)), |
| alarm_index_(alarm_index), |
| factory_(factory) {} |
| virtual ~MockAlarm() {} |
| |
| void SetImpl() override; |
| void CancelImpl() override; |
| |
| private: |
| int alarm_index_; |
| MockAlarmFactory* factory_; |
| }; |
| |
| class MockAlarmFactory : public QuicAlarmFactory { |
| public: |
| ~MockAlarmFactory() override {} |
| |
| // Creates a new platform-specific alarm which will be configured to notify |
| // |delegate| when the alarm fires. Returns an alarm allocated on the heap. |
| // Caller takes ownership of the new alarm, which will not yet be "set" to |
| // fire. |
| QuicAlarm* CreateAlarm(QuicAlarm::Delegate* delegate) override { |
| return new MockAlarm(QuicArenaScopedPtr<QuicAlarm::Delegate>(delegate), |
| alarm_index_++, this); |
| } |
| QuicArenaScopedPtr<QuicAlarm> CreateAlarm( |
| QuicArenaScopedPtr<QuicAlarm::Delegate> delegate, |
| QuicConnectionArena* arena) override { |
| if (arena != nullptr) { |
| return arena->New<MockAlarm>(std::move(delegate), alarm_index_++, this); |
| } |
| return QuicArenaScopedPtr<MockAlarm>( |
| new MockAlarm(std::move(delegate), alarm_index_++, this)); |
| } |
| MOCK_METHOD(void, OnAlarmSet, (int, QuicTime), ()); |
| MOCK_METHOD(void, OnAlarmCancelled, (int), ()); |
| |
| private: |
| int alarm_index_ = 0; |
| }; |
| |
| void MockAlarm::SetImpl() { |
| factory_->OnAlarmSet(alarm_index_, deadline()); |
| } |
| |
| void MockAlarm::CancelImpl() { |
| factory_->OnAlarmCancelled(alarm_index_); |
| } |
| |
| class QuicTimeWaitListManagerTest : public QuicTest { |
| protected: |
| QuicTimeWaitListManagerTest() |
| : time_wait_list_manager_(&writer_, &visitor_, &clock_, &alarm_factory_), |
| connection_id_(TestConnectionId(45)), |
| peer_address_(TestPeerIPAddress(), kTestPort), |
| writer_is_blocked_(false) {} |
| |
| ~QuicTimeWaitListManagerTest() override = default; |
| |
| void SetUp() override { |
| EXPECT_CALL(writer_, IsWriteBlocked()) |
| .WillRepeatedly(ReturnPointee(&writer_is_blocked_)); |
| } |
| |
| void AddConnectionId(QuicConnectionId connection_id, |
| QuicTimeWaitListManager::TimeWaitAction action) { |
| AddConnectionId(connection_id, QuicVersionMax(), action, nullptr); |
| } |
| |
| void AddStatelessConnectionId(QuicConnectionId connection_id) { |
| std::vector<std::unique_ptr<QuicEncryptedPacket>> termination_packets; |
| termination_packets.push_back(std::unique_ptr<QuicEncryptedPacket>( |
| new QuicEncryptedPacket(nullptr, 0, false))); |
| time_wait_list_manager_.AddConnectionIdToTimeWait( |
| connection_id, QuicTimeWaitListManager::SEND_TERMINATION_PACKETS, |
| TimeWaitConnectionInfo(false, &termination_packets, {connection_id})); |
| } |
| |
| void AddConnectionId( |
| QuicConnectionId connection_id, |
| ParsedQuicVersion version, |
| QuicTimeWaitListManager::TimeWaitAction action, |
| std::vector<std::unique_ptr<QuicEncryptedPacket>>* packets) { |
| time_wait_list_manager_.AddConnectionIdToTimeWait( |
| connection_id, action, |
| TimeWaitConnectionInfo(version.HasIetfInvariantHeader(), packets, |
| {connection_id})); |
| } |
| |
| bool IsConnectionIdInTimeWait(QuicConnectionId connection_id) { |
| return time_wait_list_manager_.IsConnectionIdInTimeWait(connection_id); |
| } |
| |
| void ProcessPacket(QuicConnectionId connection_id) { |
| time_wait_list_manager_.ProcessPacket( |
| self_address_, peer_address_, connection_id, GOOGLE_QUIC_PACKET, |
| kTestPacketSize, std::make_unique<QuicPerPacketContext>()); |
| } |
| |
| QuicEncryptedPacket* ConstructEncryptedPacket( |
| QuicConnectionId destination_connection_id, |
| QuicConnectionId source_connection_id, |
| uint64_t packet_number) { |
| return quic::test::ConstructEncryptedPacket(destination_connection_id, |
| source_connection_id, false, |
| false, packet_number, "data"); |
| } |
| |
| MockClock clock_; |
| MockAlarmFactory alarm_factory_; |
| NiceMock<MockPacketWriter> writer_; |
| StrictMock<MockQuicSessionVisitor> visitor_; |
| QuicTimeWaitListManager time_wait_list_manager_; |
| QuicConnectionId connection_id_; |
| QuicSocketAddress self_address_; |
| QuicSocketAddress peer_address_; |
| bool writer_is_blocked_; |
| }; |
| |
| bool ValidPublicResetPacketPredicate( |
| QuicConnectionId expected_connection_id, |
| const testing::tuple<const char*, int>& packet_buffer) { |
| FramerVisitorCapturingPublicReset visitor(expected_connection_id); |
| QuicFramer framer(AllSupportedVersions(), QuicTime::Zero(), |
| Perspective::IS_CLIENT, kQuicDefaultConnectionIdLength); |
| framer.set_visitor(&visitor); |
| QuicEncryptedPacket encrypted(testing::get<0>(packet_buffer), |
| testing::get<1>(packet_buffer)); |
| framer.ProcessPacket(encrypted); |
| QuicPublicResetPacket packet = visitor.public_reset_packet(); |
| bool public_reset_is_valid = |
| expected_connection_id == packet.connection_id && |
| TestPeerIPAddress() == packet.client_address.host() && |
| kTestPort == packet.client_address.port(); |
| |
| QuicIetfStatelessResetPacket stateless_reset = |
| visitor.stateless_reset_packet(); |
| |
| StatelessResetToken expected_stateless_reset_token = |
| QuicUtils::GenerateStatelessResetToken(expected_connection_id); |
| |
| bool stateless_reset_is_valid = |
| stateless_reset.stateless_reset_token == expected_stateless_reset_token; |
| |
| return public_reset_is_valid || stateless_reset_is_valid; |
| } |
| |
| Matcher<const testing::tuple<const char*, int>> PublicResetPacketEq( |
| QuicConnectionId connection_id) { |
| return Truly( |
| [connection_id](const testing::tuple<const char*, int> packet_buffer) { |
| return ValidPublicResetPacketPredicate(connection_id, packet_buffer); |
| }); |
| } |
| |
| TEST_F(QuicTimeWaitListManagerTest, CheckConnectionIdInTimeWait) { |
| EXPECT_FALSE(IsConnectionIdInTimeWait(connection_id_)); |
| EXPECT_CALL(visitor_, OnConnectionAddedToTimeWaitList(connection_id_)); |
| AddConnectionId(connection_id_, QuicTimeWaitListManager::DO_NOTHING); |
| EXPECT_EQ(1u, time_wait_list_manager_.num_connections()); |
| EXPECT_TRUE(IsConnectionIdInTimeWait(connection_id_)); |
| } |
| |
| TEST_F(QuicTimeWaitListManagerTest, CheckStatelessConnectionIdInTimeWait) { |
| EXPECT_FALSE(IsConnectionIdInTimeWait(connection_id_)); |
| EXPECT_CALL(visitor_, OnConnectionAddedToTimeWaitList(connection_id_)); |
| AddStatelessConnectionId(connection_id_); |
| EXPECT_EQ(1u, time_wait_list_manager_.num_connections()); |
| EXPECT_TRUE(IsConnectionIdInTimeWait(connection_id_)); |
| } |
| |
| TEST_F(QuicTimeWaitListManagerTest, SendVersionNegotiationPacket) { |
| std::unique_ptr<QuicEncryptedPacket> packet( |
| QuicFramer::BuildVersionNegotiationPacket( |
| connection_id_, EmptyQuicConnectionId(), /*ietf_quic=*/false, |
| /*use_length_prefix=*/false, AllSupportedVersions())); |
| EXPECT_CALL(writer_, WritePacket(_, packet->length(), self_address_.host(), |
| peer_address_, _)) |
| .WillOnce(Return(WriteResult(WRITE_STATUS_OK, 1))); |
| |
| time_wait_list_manager_.SendVersionNegotiationPacket( |
| connection_id_, EmptyQuicConnectionId(), /*ietf_quic=*/false, |
| /*use_length_prefix=*/false, AllSupportedVersions(), self_address_, |
| peer_address_, std::make_unique<QuicPerPacketContext>()); |
| EXPECT_EQ(0u, time_wait_list_manager_.num_connections()); |
| } |
| |
| TEST_F(QuicTimeWaitListManagerTest, |
| SendIetfVersionNegotiationPacketWithoutLengthPrefix) { |
| std::unique_ptr<QuicEncryptedPacket> packet( |
| QuicFramer::BuildVersionNegotiationPacket( |
| connection_id_, EmptyQuicConnectionId(), /*ietf_quic=*/true, |
| /*use_length_prefix=*/false, AllSupportedVersions())); |
| EXPECT_CALL(writer_, WritePacket(_, packet->length(), self_address_.host(), |
| peer_address_, _)) |
| .WillOnce(Return(WriteResult(WRITE_STATUS_OK, 1))); |
| |
| time_wait_list_manager_.SendVersionNegotiationPacket( |
| connection_id_, EmptyQuicConnectionId(), /*ietf_quic=*/true, |
| /*use_length_prefix=*/false, AllSupportedVersions(), self_address_, |
| peer_address_, std::make_unique<QuicPerPacketContext>()); |
| EXPECT_EQ(0u, time_wait_list_manager_.num_connections()); |
| } |
| |
| TEST_F(QuicTimeWaitListManagerTest, SendIetfVersionNegotiationPacket) { |
| std::unique_ptr<QuicEncryptedPacket> packet( |
| QuicFramer::BuildVersionNegotiationPacket( |
| connection_id_, EmptyQuicConnectionId(), /*ietf_quic=*/true, |
| /*use_length_prefix=*/true, AllSupportedVersions())); |
| EXPECT_CALL(writer_, WritePacket(_, packet->length(), self_address_.host(), |
| peer_address_, _)) |
| .WillOnce(Return(WriteResult(WRITE_STATUS_OK, 1))); |
| |
| time_wait_list_manager_.SendVersionNegotiationPacket( |
| connection_id_, EmptyQuicConnectionId(), /*ietf_quic=*/true, |
| /*use_length_prefix=*/true, AllSupportedVersions(), self_address_, |
| peer_address_, std::make_unique<QuicPerPacketContext>()); |
| EXPECT_EQ(0u, time_wait_list_manager_.num_connections()); |
| } |
| |
| TEST_F(QuicTimeWaitListManagerTest, |
| SendIetfVersionNegotiationPacketWithClientConnectionId) { |
| std::unique_ptr<QuicEncryptedPacket> packet( |
| QuicFramer::BuildVersionNegotiationPacket( |
| connection_id_, TestConnectionId(0x33), /*ietf_quic=*/true, |
| /*use_length_prefix=*/true, AllSupportedVersions())); |
| EXPECT_CALL(writer_, WritePacket(_, packet->length(), self_address_.host(), |
| peer_address_, _)) |
| .WillOnce(Return(WriteResult(WRITE_STATUS_OK, 1))); |
| |
| time_wait_list_manager_.SendVersionNegotiationPacket( |
| connection_id_, TestConnectionId(0x33), /*ietf_quic=*/true, |
| /*use_length_prefix=*/true, AllSupportedVersions(), self_address_, |
| peer_address_, std::make_unique<QuicPerPacketContext>()); |
| EXPECT_EQ(0u, time_wait_list_manager_.num_connections()); |
| } |
| |
| TEST_F(QuicTimeWaitListManagerTest, SendConnectionClose) { |
| const size_t kConnectionCloseLength = 100; |
| EXPECT_CALL(visitor_, OnConnectionAddedToTimeWaitList(connection_id_)); |
| std::vector<std::unique_ptr<QuicEncryptedPacket>> termination_packets; |
| termination_packets.push_back( |
| std::unique_ptr<QuicEncryptedPacket>(new QuicEncryptedPacket( |
| new char[kConnectionCloseLength], kConnectionCloseLength, true))); |
| AddConnectionId(connection_id_, QuicVersionMax(), |
| QuicTimeWaitListManager::SEND_CONNECTION_CLOSE_PACKETS, |
| &termination_packets); |
| EXPECT_CALL(writer_, WritePacket(_, kConnectionCloseLength, |
| self_address_.host(), peer_address_, _)) |
| .WillOnce(Return(WriteResult(WRITE_STATUS_OK, 1))); |
| |
| ProcessPacket(connection_id_); |
| } |
| |
| TEST_F(QuicTimeWaitListManagerTest, SendTwoConnectionCloses) { |
| const size_t kConnectionCloseLength = 100; |
| EXPECT_CALL(visitor_, OnConnectionAddedToTimeWaitList(connection_id_)); |
| std::vector<std::unique_ptr<QuicEncryptedPacket>> termination_packets; |
| termination_packets.push_back( |
| std::unique_ptr<QuicEncryptedPacket>(new QuicEncryptedPacket( |
| new char[kConnectionCloseLength], kConnectionCloseLength, true))); |
| termination_packets.push_back( |
| std::unique_ptr<QuicEncryptedPacket>(new QuicEncryptedPacket( |
| new char[kConnectionCloseLength], kConnectionCloseLength, true))); |
| AddConnectionId(connection_id_, QuicVersionMax(), |
| QuicTimeWaitListManager::SEND_CONNECTION_CLOSE_PACKETS, |
| &termination_packets); |
| EXPECT_CALL(writer_, WritePacket(_, kConnectionCloseLength, |
| self_address_.host(), peer_address_, _)) |
| .Times(2) |
| .WillOnce(Return(WriteResult(WRITE_STATUS_OK, 1))); |
| |
| ProcessPacket(connection_id_); |
| } |
| |
| TEST_F(QuicTimeWaitListManagerTest, SendPublicReset) { |
| EXPECT_CALL(visitor_, OnConnectionAddedToTimeWaitList(connection_id_)); |
| AddConnectionId(connection_id_, |
| QuicTimeWaitListManager::SEND_STATELESS_RESET); |
| EXPECT_CALL(writer_, |
| WritePacket(_, _, self_address_.host(), peer_address_, _)) |
| .With(Args<0, 1>(PublicResetPacketEq(connection_id_))) |
| .WillOnce(Return(WriteResult(WRITE_STATUS_OK, 0))); |
| |
| ProcessPacket(connection_id_); |
| } |
| |
| TEST_F(QuicTimeWaitListManagerTest, SendPublicResetWithExponentialBackOff) { |
| EXPECT_CALL(visitor_, OnConnectionAddedToTimeWaitList(connection_id_)); |
| AddConnectionId(connection_id_, |
| QuicTimeWaitListManager::SEND_STATELESS_RESET); |
| EXPECT_EQ(1u, time_wait_list_manager_.num_connections()); |
| for (int packet_number = 1; packet_number < 101; ++packet_number) { |
| if ((packet_number & (packet_number - 1)) == 0) { |
| EXPECT_CALL(writer_, WritePacket(_, _, _, _, _)) |
| .WillOnce(Return(WriteResult(WRITE_STATUS_OK, 1))); |
| } |
| ProcessPacket(connection_id_); |
| // Send public reset with exponential back off. |
| if ((packet_number & (packet_number - 1)) == 0) { |
| EXPECT_TRUE(QuicTimeWaitListManagerPeer::ShouldSendResponse( |
| &time_wait_list_manager_, packet_number)); |
| } else { |
| EXPECT_FALSE(QuicTimeWaitListManagerPeer::ShouldSendResponse( |
| &time_wait_list_manager_, packet_number)); |
| } |
| } |
| } |
| |
| TEST_F(QuicTimeWaitListManagerTest, NoPublicResetForStatelessConnections) { |
| EXPECT_CALL(visitor_, OnConnectionAddedToTimeWaitList(connection_id_)); |
| AddStatelessConnectionId(connection_id_); |
| |
| EXPECT_CALL(writer_, |
| WritePacket(_, _, self_address_.host(), peer_address_, _)) |
| .WillOnce(Return(WriteResult(WRITE_STATUS_OK, 1))); |
| |
| ProcessPacket(connection_id_); |
| } |
| |
| TEST_F(QuicTimeWaitListManagerTest, CleanUpOldConnectionIds) { |
| const size_t kConnectionIdCount = 100; |
| const size_t kOldConnectionIdCount = 31; |
| |
| // Add connection_ids such that their expiry time is time_wait_period_. |
| for (uint64_t conn_id = 1; conn_id <= kOldConnectionIdCount; ++conn_id) { |
| QuicConnectionId connection_id = TestConnectionId(conn_id); |
| EXPECT_CALL(visitor_, OnConnectionAddedToTimeWaitList(connection_id)); |
| AddConnectionId(connection_id, QuicTimeWaitListManager::DO_NOTHING); |
| } |
| EXPECT_EQ(kOldConnectionIdCount, time_wait_list_manager_.num_connections()); |
| |
| // Add remaining connection_ids such that their add time is |
| // 2 * time_wait_period_. |
| const QuicTime::Delta time_wait_period = |
| QuicTimeWaitListManagerPeer::time_wait_period(&time_wait_list_manager_); |
| clock_.AdvanceTime(time_wait_period); |
| for (uint64_t conn_id = kOldConnectionIdCount + 1; |
| conn_id <= kConnectionIdCount; ++conn_id) { |
| QuicConnectionId connection_id = TestConnectionId(conn_id); |
| EXPECT_CALL(visitor_, OnConnectionAddedToTimeWaitList(connection_id)); |
| AddConnectionId(connection_id, QuicTimeWaitListManager::DO_NOTHING); |
| } |
| EXPECT_EQ(kConnectionIdCount, time_wait_list_manager_.num_connections()); |
| |
| QuicTime::Delta offset = QuicTime::Delta::FromMicroseconds(39); |
| // Now set the current time as time_wait_period + offset usecs. |
| clock_.AdvanceTime(offset); |
| // After all the old connection_ids are cleaned up, check the next alarm |
| // interval. |
| QuicTime next_alarm_time = clock_.Now() + time_wait_period - offset; |
| EXPECT_CALL(alarm_factory_, OnAlarmSet(_, next_alarm_time)); |
| |
| time_wait_list_manager_.CleanUpOldConnectionIds(); |
| for (uint64_t conn_id = 1; conn_id <= kConnectionIdCount; ++conn_id) { |
| QuicConnectionId connection_id = TestConnectionId(conn_id); |
| EXPECT_EQ(conn_id > kOldConnectionIdCount, |
| IsConnectionIdInTimeWait(connection_id)) |
| << "kOldConnectionIdCount: " << kOldConnectionIdCount |
| << " connection_id: " << connection_id; |
| } |
| EXPECT_EQ(kConnectionIdCount - kOldConnectionIdCount, |
| time_wait_list_manager_.num_connections()); |
| } |
| |
| TEST_F(QuicTimeWaitListManagerTest, |
| CleanUpOldConnectionIdsForMultipleConnectionIdsPerConnection) { |
| if (!GetQuicRestartFlag(quic_time_wait_list_support_multiple_cid_v2)) { |
| return; |
| } |
| |
| connection_id_ = TestConnectionId(7); |
| const size_t kConnectionCloseLength = 100; |
| EXPECT_CALL(visitor_, OnConnectionAddedToTimeWaitList(connection_id_)); |
| EXPECT_CALL(visitor_, OnConnectionAddedToTimeWaitList(TestConnectionId(8))); |
| std::vector<std::unique_ptr<QuicEncryptedPacket>> termination_packets; |
| termination_packets.push_back( |
| std::unique_ptr<QuicEncryptedPacket>(new QuicEncryptedPacket( |
| new char[kConnectionCloseLength], kConnectionCloseLength, true))); |
| |
| // Add a CONNECTION_CLOSE termination packet. |
| std::vector<QuicConnectionId> active_connection_ids{connection_id_, |
| TestConnectionId(8)}; |
| time_wait_list_manager_.AddConnectionIdToTimeWait( |
| connection_id_, QuicTimeWaitListManager::SEND_CONNECTION_CLOSE_PACKETS, |
| TimeWaitConnectionInfo(/*ietf_quic=*/true, &termination_packets, |
| active_connection_ids, QuicTime::Delta::Zero())); |
| |
| EXPECT_TRUE( |
| time_wait_list_manager_.IsConnectionIdInTimeWait(TestConnectionId(7))); |
| EXPECT_TRUE( |
| time_wait_list_manager_.IsConnectionIdInTimeWait(TestConnectionId(8))); |
| |
| // Remove these IDs. |
| const QuicTime::Delta time_wait_period = |
| QuicTimeWaitListManagerPeer::time_wait_period(&time_wait_list_manager_); |
| clock_.AdvanceTime(time_wait_period); |
| time_wait_list_manager_.CleanUpOldConnectionIds(); |
| |
| EXPECT_FALSE( |
| time_wait_list_manager_.IsConnectionIdInTimeWait(TestConnectionId(7))); |
| EXPECT_FALSE( |
| time_wait_list_manager_.IsConnectionIdInTimeWait(TestConnectionId(8))); |
| } |
| |
| TEST_F(QuicTimeWaitListManagerTest, SendQueuedPackets) { |
| QuicConnectionId connection_id = TestConnectionId(1); |
| EXPECT_CALL(visitor_, OnConnectionAddedToTimeWaitList(connection_id)); |
| AddConnectionId(connection_id, QuicTimeWaitListManager::SEND_STATELESS_RESET); |
| std::unique_ptr<QuicEncryptedPacket> packet(ConstructEncryptedPacket( |
| connection_id, EmptyQuicConnectionId(), /*packet_number=*/234)); |
| // Let first write through. |
| EXPECT_CALL(writer_, |
| WritePacket(_, _, self_address_.host(), peer_address_, _)) |
| .With(Args<0, 1>(PublicResetPacketEq(connection_id))) |
| .WillOnce(Return(WriteResult(WRITE_STATUS_OK, packet->length()))); |
| ProcessPacket(connection_id); |
| |
| // write block for the next packet. |
| EXPECT_CALL(writer_, |
| WritePacket(_, _, self_address_.host(), peer_address_, _)) |
| .With(Args<0, 1>(PublicResetPacketEq(connection_id))) |
| .WillOnce(DoAll(Assign(&writer_is_blocked_, true), |
| Return(WriteResult(WRITE_STATUS_BLOCKED, EAGAIN)))); |
| EXPECT_CALL(visitor_, OnWriteBlocked(&time_wait_list_manager_)); |
| ProcessPacket(connection_id); |
| // 3rd packet. No public reset should be sent; |
| ProcessPacket(connection_id); |
| |
| // write packet should not be called since we are write blocked but the |
| // should be queued. |
| QuicConnectionId other_connection_id = TestConnectionId(2); |
| EXPECT_CALL(visitor_, OnConnectionAddedToTimeWaitList(other_connection_id)); |
| AddConnectionId(other_connection_id, |
| QuicTimeWaitListManager::SEND_STATELESS_RESET); |
| std::unique_ptr<QuicEncryptedPacket> other_packet(ConstructEncryptedPacket( |
| other_connection_id, EmptyQuicConnectionId(), /*packet_number=*/23423)); |
| EXPECT_CALL(writer_, WritePacket(_, _, _, _, _)).Times(0); |
| EXPECT_CALL(visitor_, OnWriteBlocked(&time_wait_list_manager_)); |
| ProcessPacket(other_connection_id); |
| EXPECT_EQ(2u, time_wait_list_manager_.num_connections()); |
| |
| // Now expect all the write blocked public reset packets to be sent again. |
| writer_is_blocked_ = false; |
| EXPECT_CALL(writer_, |
| WritePacket(_, _, self_address_.host(), peer_address_, _)) |
| .With(Args<0, 1>(PublicResetPacketEq(connection_id))) |
| .WillOnce(Return(WriteResult(WRITE_STATUS_OK, packet->length()))); |
| EXPECT_CALL(writer_, |
| WritePacket(_, _, self_address_.host(), peer_address_, _)) |
| .With(Args<0, 1>(PublicResetPacketEq(other_connection_id))) |
| .WillOnce(Return(WriteResult(WRITE_STATUS_OK, packet->length()))); |
| time_wait_list_manager_.OnBlockedWriterCanWrite(); |
| } |
| |
| TEST_F(QuicTimeWaitListManagerTest, AddConnectionIdTwice) { |
| // Add connection_ids such that their expiry time is time_wait_period_. |
| EXPECT_CALL(visitor_, OnConnectionAddedToTimeWaitList(connection_id_)); |
| AddConnectionId(connection_id_, QuicTimeWaitListManager::DO_NOTHING); |
| EXPECT_TRUE(IsConnectionIdInTimeWait(connection_id_)); |
| const size_t kConnectionCloseLength = 100; |
| std::vector<std::unique_ptr<QuicEncryptedPacket>> termination_packets; |
| termination_packets.push_back( |
| std::unique_ptr<QuicEncryptedPacket>(new QuicEncryptedPacket( |
| new char[kConnectionCloseLength], kConnectionCloseLength, true))); |
| AddConnectionId(connection_id_, QuicVersionMax(), |
| QuicTimeWaitListManager::SEND_TERMINATION_PACKETS, |
| &termination_packets); |
| EXPECT_TRUE(IsConnectionIdInTimeWait(connection_id_)); |
| EXPECT_EQ(1u, time_wait_list_manager_.num_connections()); |
| |
| EXPECT_CALL(writer_, WritePacket(_, kConnectionCloseLength, |
| self_address_.host(), peer_address_, _)) |
| .WillOnce(Return(WriteResult(WRITE_STATUS_OK, 1))); |
| |
| ProcessPacket(connection_id_); |
| |
| const QuicTime::Delta time_wait_period = |
| QuicTimeWaitListManagerPeer::time_wait_period(&time_wait_list_manager_); |
| |
| QuicTime::Delta offset = QuicTime::Delta::FromMicroseconds(39); |
| clock_.AdvanceTime(offset + time_wait_period); |
| // Now set the current time as time_wait_period + offset usecs. |
| QuicTime next_alarm_time = clock_.Now() + time_wait_period; |
| EXPECT_CALL(alarm_factory_, OnAlarmSet(_, next_alarm_time)); |
| |
| time_wait_list_manager_.CleanUpOldConnectionIds(); |
| EXPECT_FALSE(IsConnectionIdInTimeWait(connection_id_)); |
| EXPECT_EQ(0u, time_wait_list_manager_.num_connections()); |
| } |
| |
| TEST_F(QuicTimeWaitListManagerTest, ConnectionIdsOrderedByTime) { |
| // Simple randomization: the values of connection_ids are randomly swapped. |
| // If the container is broken, the test will be 50% flaky. |
| const uint64_t conn_id1 = QuicRandom::GetInstance()->RandUint64() % 2; |
| const QuicConnectionId connection_id1 = TestConnectionId(conn_id1); |
| const QuicConnectionId connection_id2 = TestConnectionId(1 - conn_id1); |
| |
| // 1 will hash lower than 2, but we add it later. They should come out in the |
| // add order, not hash order. |
| EXPECT_CALL(visitor_, OnConnectionAddedToTimeWaitList(connection_id1)); |
| AddConnectionId(connection_id1, QuicTimeWaitListManager::DO_NOTHING); |
| clock_.AdvanceTime(QuicTime::Delta::FromMicroseconds(10)); |
| EXPECT_CALL(visitor_, OnConnectionAddedToTimeWaitList(connection_id2)); |
| AddConnectionId(connection_id2, QuicTimeWaitListManager::DO_NOTHING); |
| EXPECT_EQ(2u, time_wait_list_manager_.num_connections()); |
| |
| const QuicTime::Delta time_wait_period = |
| QuicTimeWaitListManagerPeer::time_wait_period(&time_wait_list_manager_); |
| clock_.AdvanceTime(time_wait_period - QuicTime::Delta::FromMicroseconds(9)); |
| |
| EXPECT_CALL(alarm_factory_, OnAlarmSet(_, _)); |
| |
| time_wait_list_manager_.CleanUpOldConnectionIds(); |
| EXPECT_FALSE(IsConnectionIdInTimeWait(connection_id1)); |
| EXPECT_TRUE(IsConnectionIdInTimeWait(connection_id2)); |
| EXPECT_EQ(1u, time_wait_list_manager_.num_connections()); |
| } |
| |
| TEST_F(QuicTimeWaitListManagerTest, MaxConnectionsTest) { |
| // Basically, shut off time-based eviction. |
| SetQuicFlag(FLAGS_quic_time_wait_list_seconds, 10000000000); |
| SetQuicFlag(FLAGS_quic_time_wait_list_max_connections, 5); |
| |
| uint64_t current_conn_id = 0; |
| const int64_t kMaxConnections = |
| GetQuicFlag(FLAGS_quic_time_wait_list_max_connections); |
| // Add exactly the maximum number of connections |
| for (int64_t i = 0; i < kMaxConnections; ++i) { |
| ++current_conn_id; |
| QuicConnectionId current_connection_id = TestConnectionId(current_conn_id); |
| EXPECT_FALSE(IsConnectionIdInTimeWait(current_connection_id)); |
| EXPECT_CALL(visitor_, |
| OnConnectionAddedToTimeWaitList(current_connection_id)); |
| AddConnectionId(current_connection_id, QuicTimeWaitListManager::DO_NOTHING); |
| EXPECT_EQ(current_conn_id, time_wait_list_manager_.num_connections()); |
| EXPECT_TRUE(IsConnectionIdInTimeWait(current_connection_id)); |
| } |
| |
| // Now keep adding. Since we're already at the max, every new connection-id |
| // will evict the oldest one. |
| for (int64_t i = 0; i < kMaxConnections; ++i) { |
| ++current_conn_id; |
| QuicConnectionId current_connection_id = TestConnectionId(current_conn_id); |
| const QuicConnectionId id_to_evict = |
| TestConnectionId(current_conn_id - kMaxConnections); |
| EXPECT_TRUE(IsConnectionIdInTimeWait(id_to_evict)); |
| EXPECT_FALSE(IsConnectionIdInTimeWait(current_connection_id)); |
| EXPECT_CALL(visitor_, |
| OnConnectionAddedToTimeWaitList(current_connection_id)); |
| AddConnectionId(current_connection_id, QuicTimeWaitListManager::DO_NOTHING); |
| EXPECT_EQ(static_cast<size_t>(kMaxConnections), |
| time_wait_list_manager_.num_connections()); |
| EXPECT_FALSE(IsConnectionIdInTimeWait(id_to_evict)); |
| EXPECT_TRUE(IsConnectionIdInTimeWait(current_connection_id)); |
| } |
| } |
| |
| TEST_F(QuicTimeWaitListManagerTest, ZeroMaxConnections) { |
| // Basically, shut off time-based eviction. |
| SetQuicFlag(FLAGS_quic_time_wait_list_seconds, 10000000000); |
| // Keep time wait list empty. |
| SetQuicFlag(FLAGS_quic_time_wait_list_max_connections, 0); |
| |
| uint64_t current_conn_id = 0; |
| // Add exactly the maximum number of connections |
| for (int64_t i = 0; i < 10; ++i) { |
| ++current_conn_id; |
| QuicConnectionId current_connection_id = TestConnectionId(current_conn_id); |
| EXPECT_FALSE(IsConnectionIdInTimeWait(current_connection_id)); |
| EXPECT_CALL(visitor_, |
| OnConnectionAddedToTimeWaitList(current_connection_id)); |
| AddConnectionId(current_connection_id, QuicTimeWaitListManager::DO_NOTHING); |
| // Verify time wait list always has 1 connection. |
| EXPECT_EQ(1u, time_wait_list_manager_.num_connections()); |
| EXPECT_TRUE(IsConnectionIdInTimeWait(current_connection_id)); |
| } |
| } |
| |
| // Regression test for b/116200989. |
| TEST_F(QuicTimeWaitListManagerTest, |
| SendStatelessResetInResponseToShortHeaders) { |
| // This test mimics a scenario where an ENCRYPTION_INITIAL connection close is |
| // added as termination packet for an IETF connection ID. However, a short |
| // header packet is received later. |
| const size_t kConnectionCloseLength = 100; |
| EXPECT_CALL(visitor_, OnConnectionAddedToTimeWaitList(connection_id_)); |
| std::vector<std::unique_ptr<QuicEncryptedPacket>> termination_packets; |
| termination_packets.push_back( |
| std::unique_ptr<QuicEncryptedPacket>(new QuicEncryptedPacket( |
| new char[kConnectionCloseLength], kConnectionCloseLength, true))); |
| time_wait_list_manager_.AddConnectionIdToTimeWait( |
| connection_id_, QuicTimeWaitListManager::SEND_TERMINATION_PACKETS, |
| TimeWaitConnectionInfo(/*ietf_quic=*/true, &termination_packets, |
| {connection_id_})); |
| |
| // Termination packet is not encrypted, instead, send stateless reset. |
| EXPECT_CALL(writer_, |
| WritePacket(_, _, self_address_.host(), peer_address_, _)) |
| .With(Args<0, 1>(PublicResetPacketEq(connection_id_))) |
| .WillOnce(Return(WriteResult(WRITE_STATUS_OK, 0))); |
| // Processes IETF short header packet. |
| time_wait_list_manager_.ProcessPacket( |
| self_address_, peer_address_, connection_id_, |
| IETF_QUIC_SHORT_HEADER_PACKET, kTestPacketSize, |
| std::make_unique<QuicPerPacketContext>()); |
| } |
| |
| TEST_F(QuicTimeWaitListManagerTest, |
| SendConnectionClosePacketsInResponseToShortHeaders) { |
| const size_t kConnectionCloseLength = 100; |
| EXPECT_CALL(visitor_, OnConnectionAddedToTimeWaitList(connection_id_)); |
| std::vector<std::unique_ptr<QuicEncryptedPacket>> termination_packets; |
| termination_packets.push_back( |
| std::unique_ptr<QuicEncryptedPacket>(new QuicEncryptedPacket( |
| new char[kConnectionCloseLength], kConnectionCloseLength, true))); |
| // Add a CONNECTION_CLOSE termination packet. |
| time_wait_list_manager_.AddConnectionIdToTimeWait( |
| connection_id_, QuicTimeWaitListManager::SEND_CONNECTION_CLOSE_PACKETS, |
| TimeWaitConnectionInfo(/*ietf_quic=*/true, &termination_packets, |
| {connection_id_})); |
| EXPECT_CALL(writer_, WritePacket(_, kConnectionCloseLength, |
| self_address_.host(), peer_address_, _)) |
| .WillOnce(Return(WriteResult(WRITE_STATUS_OK, 1))); |
| |
| // Processes IETF short header packet. |
| time_wait_list_manager_.ProcessPacket( |
| self_address_, peer_address_, connection_id_, |
| IETF_QUIC_SHORT_HEADER_PACKET, kTestPacketSize, |
| std::make_unique<QuicPerPacketContext>()); |
| } |
| |
| TEST_F(QuicTimeWaitListManagerTest, |
| SendConnectionClosePacketsForMultipleConnectionIds) { |
| if (!GetQuicRestartFlag(quic_time_wait_list_support_multiple_cid_v2)) { |
| return; |
| } |
| |
| connection_id_ = TestConnectionId(7); |
| const size_t kConnectionCloseLength = 100; |
| EXPECT_CALL(visitor_, OnConnectionAddedToTimeWaitList(connection_id_)); |
| EXPECT_CALL(visitor_, OnConnectionAddedToTimeWaitList(TestConnectionId(8))); |
| std::vector<std::unique_ptr<QuicEncryptedPacket>> termination_packets; |
| termination_packets.push_back( |
| std::unique_ptr<QuicEncryptedPacket>(new QuicEncryptedPacket( |
| new char[kConnectionCloseLength], kConnectionCloseLength, true))); |
| |
| // Add a CONNECTION_CLOSE termination packet. |
| std::vector<QuicConnectionId> active_connection_ids{connection_id_, |
| TestConnectionId(8)}; |
| time_wait_list_manager_.AddConnectionIdToTimeWait( |
| connection_id_, QuicTimeWaitListManager::SEND_CONNECTION_CLOSE_PACKETS, |
| TimeWaitConnectionInfo(/*ietf_quic=*/true, &termination_packets, |
| active_connection_ids, QuicTime::Delta::Zero())); |
| |
| EXPECT_CALL(writer_, WritePacket(_, kConnectionCloseLength, |
| self_address_.host(), peer_address_, _)) |
| .Times(2) |
| .WillRepeatedly(Return(WriteResult(WRITE_STATUS_OK, 1))); |
| // Processes IETF short header packet. |
| for (auto const& cid : active_connection_ids) { |
| time_wait_list_manager_.ProcessPacket( |
| self_address_, peer_address_, cid, IETF_QUIC_SHORT_HEADER_PACKET, |
| kTestPacketSize, std::make_unique<QuicPerPacketContext>()); |
| } |
| } |
| |
| // Regression test for b/184053898. |
| TEST_F(QuicTimeWaitListManagerTest, DonotCrashOnNullStatelessReset) { |
| // Received a packet with length < |
| // QuicFramer::GetMinStatelessResetPacketLength(), and this will result in a |
| // null stateless reset. |
| time_wait_list_manager_.SendPublicReset( |
| self_address_, peer_address_, TestConnectionId(1), |
| /*ietf_quic=*/true, |
| /*received_packet_length=*/ |
| QuicFramer::GetMinStatelessResetPacketLength() - 1, |
| /*packet_context=*/nullptr); |
| } |
| |
| TEST_F(QuicTimeWaitListManagerTest, SendOrQueueNullPacket) { |
| QuicTimeWaitListManagerPeer::SendOrQueuePacket(&time_wait_list_manager_, |
| nullptr, nullptr); |
| } |
| |
| } // namespace |
| } // namespace test |
| } // namespace quic |
