| /* |
| * Copyright (c) 2021 The WebRTC project authors. All Rights Reserved. |
| * |
| * Use of this source code is governed by a BSD-style license |
| * that can be found in the LICENSE file in the root of the source |
| * tree. An additional intellectual property rights grant can be found |
| * in the file PATENTS. All contributing project authors may |
| * be found in the AUTHORS file in the root of the source tree. |
| */ |
| #include "net/dcsctp/socket/stream_reset_handler.h" |
| |
| #include <array> |
| #include <cstdint> |
| #include <memory> |
| #include <optional> |
| #include <type_traits> |
| #include <vector> |
| |
| #include "api/array_view.h" |
| #include "api/task_queue/task_queue_base.h" |
| #include "net/dcsctp/common/handover_testing.h" |
| #include "net/dcsctp/common/internal_types.h" |
| #include "net/dcsctp/packet/chunk/forward_tsn_common.h" |
| #include "net/dcsctp/packet/chunk/reconfig_chunk.h" |
| #include "net/dcsctp/packet/parameter/incoming_ssn_reset_request_parameter.h" |
| #include "net/dcsctp/packet/parameter/outgoing_ssn_reset_request_parameter.h" |
| #include "net/dcsctp/packet/parameter/parameter.h" |
| #include "net/dcsctp/packet/parameter/reconfiguration_response_parameter.h" |
| #include "net/dcsctp/public/dcsctp_message.h" |
| #include "net/dcsctp/public/types.h" |
| #include "net/dcsctp/rx/data_tracker.h" |
| #include "net/dcsctp/rx/reassembly_queue.h" |
| #include "net/dcsctp/socket/mock_context.h" |
| #include "net/dcsctp/socket/mock_dcsctp_socket_callbacks.h" |
| #include "net/dcsctp/testing/data_generator.h" |
| #include "net/dcsctp/testing/testing_macros.h" |
| #include "net/dcsctp/timer/timer.h" |
| #include "net/dcsctp/tx/mock_send_queue.h" |
| #include "net/dcsctp/tx/retransmission_queue.h" |
| #include "rtc_base/gunit.h" |
| #include "test/gmock.h" |
| |
| namespace dcsctp { |
| namespace { |
| using ::testing::IsEmpty; |
| using ::testing::NiceMock; |
| using ::testing::Property; |
| using ::testing::Return; |
| using ::testing::SizeIs; |
| using ::testing::UnorderedElementsAre; |
| using ::webrtc::TimeDelta; |
| using ResponseResult = ReconfigurationResponseParameter::Result; |
| using SkippedStream = AnyForwardTsnChunk::SkippedStream; |
| |
| constexpr TSN kMyInitialTsn = MockContext::MyInitialTsn(); |
| constexpr ReconfigRequestSN kMyInitialReqSn = ReconfigRequestSN(*kMyInitialTsn); |
| constexpr TSN kPeerInitialTsn = MockContext::PeerInitialTsn(); |
| constexpr ReconfigRequestSN kPeerInitialReqSn = |
| ReconfigRequestSN(*kPeerInitialTsn); |
| constexpr uint32_t kArwnd = 131072; |
| constexpr TimeDelta kRto = TimeDelta::Millis(250); |
| |
| constexpr std::array<uint8_t, 4> kShortPayload = {1, 2, 3, 4}; |
| |
| MATCHER_P3(SctpMessageIs, stream_id, ppid, expected_payload, "") { |
| if (arg.stream_id() != stream_id) { |
| *result_listener << "the stream_id is " << *arg.stream_id(); |
| return false; |
| } |
| |
| if (arg.ppid() != ppid) { |
| *result_listener << "the ppid is " << *arg.ppid(); |
| return false; |
| } |
| |
| if (std::vector<uint8_t>(arg.payload().begin(), arg.payload().end()) != |
| std::vector<uint8_t>(expected_payload.begin(), expected_payload.end())) { |
| *result_listener << "the payload is wrong"; |
| return false; |
| } |
| return true; |
| } |
| |
| TSN AddTo(TSN tsn, int delta) { |
| return TSN(*tsn + delta); |
| } |
| |
| ReconfigRequestSN AddTo(ReconfigRequestSN req_sn, int delta) { |
| return ReconfigRequestSN(*req_sn + delta); |
| } |
| |
| class StreamResetHandlerTest : public testing::Test { |
| protected: |
| StreamResetHandlerTest() |
| : ctx_(&callbacks_), |
| timer_manager_([this](webrtc::TaskQueueBase::DelayPrecision precision) { |
| return callbacks_.CreateTimeout(precision); |
| }), |
| delayed_ack_timer_(timer_manager_.CreateTimer( |
| "test/delayed_ack", |
| []() { return TimeDelta::Zero(); }, |
| TimerOptions(TimeDelta::Zero()))), |
| t3_rtx_timer_(timer_manager_.CreateTimer( |
| "test/t3_rtx", |
| []() { return TimeDelta::Zero(); }, |
| TimerOptions(TimeDelta::Zero()))), |
| data_tracker_(std::make_unique<DataTracker>("log: ", |
| delayed_ack_timer_.get(), |
| kPeerInitialTsn)), |
| reasm_(std::make_unique<ReassemblyQueue>("log: ", kArwnd)), |
| retransmission_queue_(std::make_unique<RetransmissionQueue>( |
| "", |
| &callbacks_, |
| kMyInitialTsn, |
| kArwnd, |
| producer_, |
| [](TimeDelta rtt) {}, |
| []() {}, |
| *t3_rtx_timer_, |
| DcSctpOptions())), |
| handler_( |
| std::make_unique<StreamResetHandler>("log: ", |
| &ctx_, |
| &timer_manager_, |
| data_tracker_.get(), |
| reasm_.get(), |
| retransmission_queue_.get())) { |
| EXPECT_CALL(ctx_, current_rto).WillRepeatedly(Return(kRto)); |
| } |
| |
| void AdvanceTime(TimeDelta duration) { |
| callbacks_.AdvanceTime(duration); |
| for (;;) { |
| std::optional<TimeoutID> timeout_id = callbacks_.GetNextExpiredTimeout(); |
| if (!timeout_id.has_value()) { |
| break; |
| } |
| timer_manager_.HandleTimeout(*timeout_id); |
| } |
| } |
| |
| // Handles the passed in RE-CONFIG `chunk` and returns the responses |
| // that are sent in the response RE-CONFIG. |
| std::vector<ReconfigurationResponseParameter> HandleAndCatchResponse( |
| ReConfigChunk chunk) { |
| handler_->HandleReConfig(std::move(chunk)); |
| |
| std::vector<uint8_t> payload = callbacks_.ConsumeSentPacket(); |
| if (payload.empty()) { |
| EXPECT_TRUE(false); |
| return {}; |
| } |
| |
| std::vector<ReconfigurationResponseParameter> responses; |
| std::optional<SctpPacket> p = SctpPacket::Parse(payload, DcSctpOptions()); |
| if (!p.has_value()) { |
| EXPECT_TRUE(false); |
| return {}; |
| } |
| if (p->descriptors().size() != 1) { |
| EXPECT_TRUE(false); |
| return {}; |
| } |
| std::optional<ReConfigChunk> response_chunk = |
| ReConfigChunk::Parse(p->descriptors()[0].data); |
| if (!response_chunk.has_value()) { |
| EXPECT_TRUE(false); |
| return {}; |
| } |
| for (const auto& desc : response_chunk->parameters().descriptors()) { |
| if (desc.type == ReconfigurationResponseParameter::kType) { |
| std::optional<ReconfigurationResponseParameter> response = |
| ReconfigurationResponseParameter::Parse(desc.data); |
| if (!response.has_value()) { |
| EXPECT_TRUE(false); |
| return {}; |
| } |
| responses.emplace_back(*std::move(response)); |
| } |
| } |
| return responses; |
| } |
| |
| void PerformHandover() { |
| EXPECT_TRUE(handler_->GetHandoverReadiness().IsReady()); |
| EXPECT_TRUE(data_tracker_->GetHandoverReadiness().IsReady()); |
| EXPECT_TRUE(reasm_->GetHandoverReadiness().IsReady()); |
| EXPECT_TRUE(retransmission_queue_->GetHandoverReadiness().IsReady()); |
| |
| DcSctpSocketHandoverState state; |
| handler_->AddHandoverState(state); |
| data_tracker_->AddHandoverState(state); |
| reasm_->AddHandoverState(state); |
| |
| retransmission_queue_->AddHandoverState(state); |
| |
| g_handover_state_transformer_for_test(&state); |
| |
| data_tracker_ = std::make_unique<DataTracker>( |
| "log: ", delayed_ack_timer_.get(), kPeerInitialTsn); |
| data_tracker_->RestoreFromState(state); |
| reasm_ = std::make_unique<ReassemblyQueue>("log: ", kArwnd); |
| reasm_->RestoreFromState(state); |
| retransmission_queue_ = std::make_unique<RetransmissionQueue>( |
| "", &callbacks_, kMyInitialTsn, kArwnd, producer_, [](TimeDelta rtt) {}, |
| []() {}, *t3_rtx_timer_, DcSctpOptions(), |
| /*supports_partial_reliability=*/true, |
| /*use_message_interleaving=*/false); |
| retransmission_queue_->RestoreFromState(state); |
| handler_ = std::make_unique<StreamResetHandler>( |
| "log: ", &ctx_, &timer_manager_, data_tracker_.get(), reasm_.get(), |
| retransmission_queue_.get(), &state); |
| } |
| |
| DataGenerator gen_; |
| NiceMock<MockDcSctpSocketCallbacks> callbacks_; |
| NiceMock<MockContext> ctx_; |
| NiceMock<MockSendQueue> producer_; |
| TimerManager timer_manager_; |
| std::unique_ptr<Timer> delayed_ack_timer_; |
| std::unique_ptr<Timer> t3_rtx_timer_; |
| std::unique_ptr<DataTracker> data_tracker_; |
| std::unique_ptr<ReassemblyQueue> reasm_; |
| std::unique_ptr<RetransmissionQueue> retransmission_queue_; |
| std::unique_ptr<StreamResetHandler> handler_; |
| }; |
| |
| TEST_F(StreamResetHandlerTest, ChunkWithNoParametersReturnsError) { |
| EXPECT_CALL(callbacks_, SendPacketWithStatus).Times(0); |
| EXPECT_CALL(callbacks_, OnError).Times(1); |
| handler_->HandleReConfig(ReConfigChunk(Parameters())); |
| } |
| |
| TEST_F(StreamResetHandlerTest, ChunkWithInvalidParametersReturnsError) { |
| Parameters::Builder builder; |
| // Two OutgoingSSNResetRequestParameter in a RE-CONFIG is not valid. |
| builder.Add(OutgoingSSNResetRequestParameter(ReconfigRequestSN(1), |
| ReconfigRequestSN(10), |
| kPeerInitialTsn, {StreamID(1)})); |
| builder.Add(OutgoingSSNResetRequestParameter(ReconfigRequestSN(2), |
| ReconfigRequestSN(10), |
| kPeerInitialTsn, {StreamID(2)})); |
| |
| EXPECT_CALL(callbacks_, SendPacketWithStatus).Times(0); |
| EXPECT_CALL(callbacks_, OnError).Times(1); |
| handler_->HandleReConfig(ReConfigChunk(builder.Build())); |
| } |
| |
| TEST_F(StreamResetHandlerTest, FailToDeliverWithoutResettingStream) { |
| reasm_->Add(kPeerInitialTsn, gen_.Ordered({1, 2, 3, 4}, "BE")); |
| reasm_->Add(AddTo(kPeerInitialTsn, 1), gen_.Ordered({1, 2, 3, 4}, "BE")); |
| |
| data_tracker_->Observe(kPeerInitialTsn); |
| data_tracker_->Observe(AddTo(kPeerInitialTsn, 1)); |
| EXPECT_THAT(reasm_->FlushMessages(), |
| UnorderedElementsAre( |
| SctpMessageIs(StreamID(1), PPID(53), kShortPayload), |
| SctpMessageIs(StreamID(1), PPID(53), kShortPayload))); |
| |
| gen_.ResetStream(); |
| reasm_->Add(AddTo(kPeerInitialTsn, 2), gen_.Ordered({1, 2, 3, 4}, "BE")); |
| EXPECT_THAT(reasm_->FlushMessages(), IsEmpty()); |
| } |
| |
| TEST_F(StreamResetHandlerTest, ResetStreamsNotDeferred) { |
| reasm_->Add(kPeerInitialTsn, gen_.Ordered({1, 2, 3, 4}, "BE")); |
| reasm_->Add(AddTo(kPeerInitialTsn, 1), gen_.Ordered({1, 2, 3, 4}, "BE")); |
| |
| data_tracker_->Observe(kPeerInitialTsn); |
| data_tracker_->Observe(AddTo(kPeerInitialTsn, 1)); |
| EXPECT_THAT(reasm_->FlushMessages(), |
| UnorderedElementsAre( |
| SctpMessageIs(StreamID(1), PPID(53), kShortPayload), |
| SctpMessageIs(StreamID(1), PPID(53), kShortPayload))); |
| |
| Parameters::Builder builder; |
| builder.Add(OutgoingSSNResetRequestParameter( |
| kPeerInitialReqSn, ReconfigRequestSN(3), AddTo(kPeerInitialTsn, 1), |
| {StreamID(1)})); |
| |
| std::vector<ReconfigurationResponseParameter> responses = |
| HandleAndCatchResponse(ReConfigChunk(builder.Build())); |
| EXPECT_THAT(responses, SizeIs(1)); |
| EXPECT_EQ(responses[0].result(), ResponseResult::kSuccessPerformed); |
| |
| gen_.ResetStream(); |
| reasm_->Add(AddTo(kPeerInitialTsn, 2), gen_.Ordered({1, 2, 3, 4}, "BE")); |
| EXPECT_THAT(reasm_->FlushMessages(), |
| UnorderedElementsAre( |
| SctpMessageIs(StreamID(1), PPID(53), kShortPayload))); |
| } |
| |
| TEST_F(StreamResetHandlerTest, ResetStreamsDeferred) { |
| constexpr StreamID kStreamId = StreamID(1); |
| data_tracker_->Observe(TSN(10)); |
| reasm_->Add(TSN(10), gen_.Ordered({1, 2, 3, 4}, "BE", {.mid = MID(0)})); |
| |
| data_tracker_->Observe(TSN(11)); |
| reasm_->Add(TSN(11), gen_.Ordered({1, 2, 3, 4}, "BE", {.mid = MID(1)})); |
| |
| EXPECT_THAT( |
| reasm_->FlushMessages(), |
| UnorderedElementsAre(SctpMessageIs(kStreamId, PPID(53), kShortPayload), |
| SctpMessageIs(kStreamId, PPID(53), kShortPayload))); |
| |
| Parameters::Builder builder; |
| builder.Add(OutgoingSSNResetRequestParameter( |
| ReconfigRequestSN(10), ReconfigRequestSN(3), TSN(13), {kStreamId})); |
| EXPECT_THAT(HandleAndCatchResponse(ReConfigChunk(builder.Build())), |
| ElementsAre(Property(&ReconfigurationResponseParameter::result, |
| ResponseResult::kInProgress))); |
| |
| data_tracker_->Observe(TSN(15)); |
| reasm_->Add(TSN(15), gen_.Ordered({1, 2, 3, 4}, "BE", |
| {.mid = MID(1), .ppid = PPID(5)})); |
| |
| data_tracker_->Observe(TSN(14)); |
| reasm_->Add(TSN(14), gen_.Ordered({1, 2, 3, 4}, "BE", |
| {.mid = MID(0), .ppid = PPID(4)})); |
| |
| data_tracker_->Observe(TSN(13)); |
| reasm_->Add(TSN(13), gen_.Ordered({1, 2, 3, 4}, "BE", |
| {.mid = MID(3), .ppid = PPID(3)})); |
| |
| data_tracker_->Observe(TSN(12)); |
| reasm_->Add(TSN(12), gen_.Ordered({1, 2, 3, 4}, "BE", |
| {.mid = MID(2), .ppid = PPID(2)})); |
| |
| builder.Add(OutgoingSSNResetRequestParameter( |
| ReconfigRequestSN(11), ReconfigRequestSN(4), TSN(13), {kStreamId})); |
| EXPECT_THAT(HandleAndCatchResponse(ReConfigChunk(builder.Build())), |
| ElementsAre(Property(&ReconfigurationResponseParameter::result, |
| ResponseResult::kSuccessPerformed))); |
| |
| EXPECT_THAT( |
| reasm_->FlushMessages(), |
| UnorderedElementsAre(SctpMessageIs(kStreamId, PPID(2), kShortPayload), |
| SctpMessageIs(kStreamId, PPID(3), kShortPayload), |
| SctpMessageIs(kStreamId, PPID(4), kShortPayload), |
| SctpMessageIs(kStreamId, PPID(5), kShortPayload))); |
| } |
| |
| TEST_F(StreamResetHandlerTest, ResetStreamsDeferredOnlySelectedStreams) { |
| // This test verifies the receiving behavior of receiving messages on |
| // streams 1, 2 and 3, and receiving a reset request on stream 1, 2, causing |
| // deferred reset processing. |
| |
| // Reset stream 1,2 with "last assigned TSN=12" |
| Parameters::Builder builder; |
| builder.Add(OutgoingSSNResetRequestParameter(ReconfigRequestSN(10), |
| ReconfigRequestSN(3), TSN(12), |
| {StreamID(1), StreamID(2)})); |
| EXPECT_THAT(HandleAndCatchResponse(ReConfigChunk(builder.Build())), |
| ElementsAre(Property(&ReconfigurationResponseParameter::result, |
| ResponseResult::kInProgress))); |
| |
| // TSN 10, SID 1 - before TSN 12 -> deliver |
| data_tracker_->Observe(TSN(10)); |
| reasm_->Add(TSN(10), gen_.Ordered({1, 2, 3, 4}, "BE", |
| {.stream_id = StreamID(1), |
| .mid = MID(0), |
| .ppid = PPID(1001)})); |
| |
| // TSN 11, SID 2 - before TSN 12 -> deliver |
| data_tracker_->Observe(TSN(11)); |
| reasm_->Add(TSN(11), gen_.Ordered({1, 2, 3, 4}, "BE", |
| {.stream_id = StreamID(2), |
| .mid = MID(0), |
| .ppid = PPID(1002)})); |
| |
| // TSN 12, SID 3 - at TSN 12 -> deliver |
| data_tracker_->Observe(TSN(12)); |
| reasm_->Add(TSN(12), gen_.Ordered({1, 2, 3, 4}, "BE", |
| {.stream_id = StreamID(3), |
| .mid = MID(0), |
| .ppid = PPID(1003)})); |
| |
| // TSN 13, SID 1 - after TSN 12 and SID=1 -> defer |
| data_tracker_->Observe(TSN(13)); |
| reasm_->Add(TSN(13), gen_.Ordered({1, 2, 3, 4}, "BE", |
| {.stream_id = StreamID(1), |
| .mid = MID(0), |
| .ppid = PPID(1004)})); |
| |
| // TSN 14, SID 2 - after TSN 12 and SID=2 -> defer |
| data_tracker_->Observe(TSN(14)); |
| reasm_->Add(TSN(14), gen_.Ordered({1, 2, 3, 4}, "BE", |
| {.stream_id = StreamID(2), |
| .mid = MID(0), |
| .ppid = PPID(1005)})); |
| |
| // TSN 15, SID 3 - after TSN 12, but SID 3 is not reset -> deliver |
| data_tracker_->Observe(TSN(15)); |
| reasm_->Add(TSN(15), gen_.Ordered({1, 2, 3, 4}, "BE", |
| {.stream_id = StreamID(3), |
| .mid = MID(1), |
| .ppid = PPID(1006)})); |
| |
| EXPECT_THAT(reasm_->FlushMessages(), |
| UnorderedElementsAre( |
| SctpMessageIs(StreamID(1), PPID(1001), kShortPayload), |
| SctpMessageIs(StreamID(2), PPID(1002), kShortPayload), |
| SctpMessageIs(StreamID(3), PPID(1003), kShortPayload), |
| SctpMessageIs(StreamID(3), PPID(1006), kShortPayload))); |
| |
| builder.Add(OutgoingSSNResetRequestParameter(ReconfigRequestSN(11), |
| ReconfigRequestSN(3), TSN(13), |
| {StreamID(1), StreamID(2)})); |
| EXPECT_THAT(HandleAndCatchResponse(ReConfigChunk(builder.Build())), |
| ElementsAre(Property(&ReconfigurationResponseParameter::result, |
| ResponseResult::kSuccessPerformed))); |
| |
| EXPECT_THAT(reasm_->FlushMessages(), |
| UnorderedElementsAre( |
| SctpMessageIs(StreamID(1), PPID(1004), kShortPayload), |
| SctpMessageIs(StreamID(2), PPID(1005), kShortPayload))); |
| } |
| |
| TEST_F(StreamResetHandlerTest, ResetStreamsDefersForwardTsn) { |
| // This test verifies that FORWARD-TSNs are deferred if they want to move |
| // the cumulative ack TSN point past sender's last assigned TSN. |
| static constexpr StreamID kStreamId = StreamID(42); |
| |
| // Simulate sender sends: |
| // * TSN 10 (SSN=0, BE, lost), |
| // * TSN 11 (SSN=1, BE, lost), |
| // * TSN 12 (SSN=2, BE, lost) |
| // * RESET THE STREAM |
| // * TSN 13 (SSN=0, B, received) |
| // * TSN 14 (SSN=0, E, lost), |
| // * TSN 15 (SSN=1, BE, received) |
| Parameters::Builder builder; |
| builder.Add(OutgoingSSNResetRequestParameter( |
| ReconfigRequestSN(10), ReconfigRequestSN(3), TSN(12), {kStreamId})); |
| EXPECT_THAT(HandleAndCatchResponse(ReConfigChunk(builder.Build())), |
| ElementsAre(Property(&ReconfigurationResponseParameter::result, |
| ResponseResult::kInProgress))); |
| |
| // TSN 13, B, after TSN=12 -> defer |
| data_tracker_->Observe(TSN(13)); |
| reasm_->Add(TSN(13), |
| gen_.Ordered( |
| {1, 2, 3, 4}, "B", |
| {.stream_id = kStreamId, .mid = MID(0), .ppid = PPID(1004)})); |
| |
| // TSN 15, BE, after TSN=12 -> defer |
| data_tracker_->Observe(TSN(15)); |
| reasm_->Add(TSN(15), |
| gen_.Ordered( |
| {1, 2, 3, 4}, "BE", |
| {.stream_id = kStreamId, .mid = MID(1), .ppid = PPID(1005)})); |
| |
| // Time passes, sender decides to send FORWARD-TSN up to the RESET. |
| data_tracker_->HandleForwardTsn(TSN(12)); |
| reasm_->HandleForwardTsn( |
| TSN(12), std::vector<SkippedStream>({SkippedStream(kStreamId, SSN(2))})); |
| |
| // The receiver sends a SACK in response to that. The stream hasn't been |
| // reset yet, but the sender now decides that TSN=13-14 is to be skipped. |
| // As this has a TSN 14, after TSN=12 -> defer it. |
| data_tracker_->HandleForwardTsn(TSN(14)); |
| reasm_->HandleForwardTsn( |
| TSN(14), std::vector<SkippedStream>({SkippedStream(kStreamId, SSN(0))})); |
| |
| // Reset the stream -> deferred TSNs should be re-added. |
| builder.Add(OutgoingSSNResetRequestParameter( |
| ReconfigRequestSN(11), ReconfigRequestSN(3), TSN(12), {kStreamId})); |
| EXPECT_THAT(HandleAndCatchResponse(ReConfigChunk(builder.Build())), |
| ElementsAre(Property(&ReconfigurationResponseParameter::result, |
| ResponseResult::kSuccessPerformed))); |
| |
| EXPECT_THAT(reasm_->FlushMessages(), |
| UnorderedElementsAre( |
| SctpMessageIs(kStreamId, PPID(1005), kShortPayload))); |
| } |
| |
| TEST_F(StreamResetHandlerTest, SendOutgoingRequestDirectly) { |
| EXPECT_CALL(producer_, PrepareResetStream(StreamID(42))); |
| handler_->ResetStreams(std::vector<StreamID>({StreamID(42)})); |
| |
| EXPECT_CALL(producer_, HasStreamsReadyToBeReset()).WillOnce(Return(true)); |
| EXPECT_CALL(producer_, GetStreamsReadyToBeReset()) |
| .WillOnce(Return(std::vector<StreamID>({StreamID(42)}))); |
| |
| std::optional<ReConfigChunk> reconfig = handler_->MakeStreamResetRequest(); |
| ASSERT_TRUE(reconfig.has_value()); |
| ASSERT_HAS_VALUE_AND_ASSIGN( |
| OutgoingSSNResetRequestParameter req, |
| reconfig->parameters().get<OutgoingSSNResetRequestParameter>()); |
| |
| EXPECT_EQ(req.request_sequence_number(), kMyInitialReqSn); |
| EXPECT_EQ(req.sender_last_assigned_tsn(), |
| TSN(*retransmission_queue_->next_tsn() - 1)); |
| EXPECT_THAT(req.stream_ids(), UnorderedElementsAre(StreamID(42))); |
| } |
| |
| TEST_F(StreamResetHandlerTest, ResetMultipleStreamsInOneRequest) { |
| EXPECT_CALL(producer_, PrepareResetStream(StreamID(40))); |
| EXPECT_CALL(producer_, PrepareResetStream(StreamID(41))); |
| EXPECT_CALL(producer_, PrepareResetStream(StreamID(42))).Times(2); |
| EXPECT_CALL(producer_, PrepareResetStream(StreamID(43))); |
| EXPECT_CALL(producer_, PrepareResetStream(StreamID(44))); |
| handler_->ResetStreams(std::vector<StreamID>({StreamID(42)})); |
| handler_->ResetStreams( |
| std::vector<StreamID>({StreamID(43), StreamID(44), StreamID(41)})); |
| handler_->ResetStreams(std::vector<StreamID>({StreamID(42), StreamID(40)})); |
| |
| EXPECT_CALL(producer_, HasStreamsReadyToBeReset()).WillOnce(Return(true)); |
| EXPECT_CALL(producer_, GetStreamsReadyToBeReset()) |
| .WillOnce(Return( |
| std::vector<StreamID>({StreamID(40), StreamID(41), StreamID(42), |
| StreamID(43), StreamID(44)}))); |
| std::optional<ReConfigChunk> reconfig = handler_->MakeStreamResetRequest(); |
| ASSERT_TRUE(reconfig.has_value()); |
| ASSERT_HAS_VALUE_AND_ASSIGN( |
| OutgoingSSNResetRequestParameter req, |
| reconfig->parameters().get<OutgoingSSNResetRequestParameter>()); |
| |
| EXPECT_EQ(req.request_sequence_number(), kMyInitialReqSn); |
| EXPECT_EQ(req.sender_last_assigned_tsn(), |
| TSN(*retransmission_queue_->next_tsn() - 1)); |
| EXPECT_THAT(req.stream_ids(), |
| UnorderedElementsAre(StreamID(40), StreamID(41), StreamID(42), |
| StreamID(43), StreamID(44))); |
| } |
| |
| TEST_F(StreamResetHandlerTest, SendOutgoingRequestDeferred) { |
| EXPECT_CALL(producer_, PrepareResetStream(StreamID(42))); |
| handler_->ResetStreams(std::vector<StreamID>({StreamID(42)})); |
| |
| EXPECT_CALL(producer_, HasStreamsReadyToBeReset()) |
| .WillOnce(Return(false)) |
| .WillOnce(Return(false)) |
| .WillOnce(Return(true)); |
| |
| EXPECT_FALSE(handler_->MakeStreamResetRequest().has_value()); |
| EXPECT_FALSE(handler_->MakeStreamResetRequest().has_value()); |
| EXPECT_TRUE(handler_->MakeStreamResetRequest().has_value()); |
| } |
| |
| TEST_F(StreamResetHandlerTest, SendOutgoingResettingOnPositiveResponse) { |
| EXPECT_CALL(producer_, PrepareResetStream(StreamID(42))); |
| handler_->ResetStreams(std::vector<StreamID>({StreamID(42)})); |
| |
| EXPECT_CALL(producer_, HasStreamsReadyToBeReset()).WillOnce(Return(true)); |
| EXPECT_CALL(producer_, GetStreamsReadyToBeReset()) |
| .WillOnce(Return(std::vector<StreamID>({StreamID(42)}))); |
| |
| std::optional<ReConfigChunk> reconfig = handler_->MakeStreamResetRequest(); |
| ASSERT_TRUE(reconfig.has_value()); |
| ASSERT_HAS_VALUE_AND_ASSIGN( |
| OutgoingSSNResetRequestParameter req, |
| reconfig->parameters().get<OutgoingSSNResetRequestParameter>()); |
| |
| Parameters::Builder builder; |
| builder.Add(ReconfigurationResponseParameter( |
| req.request_sequence_number(), ResponseResult::kSuccessPerformed)); |
| ReConfigChunk response_reconfig(builder.Build()); |
| |
| EXPECT_CALL(producer_, CommitResetStreams); |
| EXPECT_CALL(producer_, RollbackResetStreams).Times(0); |
| |
| // Processing a response shouldn't result in sending anything. |
| EXPECT_CALL(callbacks_, OnError).Times(0); |
| EXPECT_CALL(callbacks_, SendPacketWithStatus).Times(0); |
| handler_->HandleReConfig(std::move(response_reconfig)); |
| } |
| |
| TEST_F(StreamResetHandlerTest, SendOutgoingResetRollbackOnError) { |
| EXPECT_CALL(producer_, PrepareResetStream(StreamID(42))); |
| handler_->ResetStreams(std::vector<StreamID>({StreamID(42)})); |
| |
| EXPECT_CALL(producer_, HasStreamsReadyToBeReset()).WillOnce(Return(true)); |
| EXPECT_CALL(producer_, GetStreamsReadyToBeReset()) |
| .WillOnce(Return(std::vector<StreamID>({StreamID(42)}))); |
| |
| std::optional<ReConfigChunk> reconfig = handler_->MakeStreamResetRequest(); |
| ASSERT_TRUE(reconfig.has_value()); |
| ASSERT_HAS_VALUE_AND_ASSIGN( |
| OutgoingSSNResetRequestParameter req, |
| reconfig->parameters().get<OutgoingSSNResetRequestParameter>()); |
| |
| Parameters::Builder builder; |
| builder.Add(ReconfigurationResponseParameter( |
| req.request_sequence_number(), ResponseResult::kErrorBadSequenceNumber)); |
| ReConfigChunk response_reconfig(builder.Build()); |
| |
| EXPECT_CALL(producer_, CommitResetStreams).Times(0); |
| EXPECT_CALL(producer_, RollbackResetStreams); |
| |
| // Only requests should result in sending responses. |
| EXPECT_CALL(callbacks_, OnError).Times(0); |
| EXPECT_CALL(callbacks_, SendPacketWithStatus).Times(0); |
| handler_->HandleReConfig(std::move(response_reconfig)); |
| } |
| |
| TEST_F(StreamResetHandlerTest, SendOutgoingResetRetransmitOnInProgress) { |
| static constexpr StreamID kStreamToReset = StreamID(42); |
| |
| EXPECT_CALL(producer_, PrepareResetStream(kStreamToReset)); |
| handler_->ResetStreams(std::vector<StreamID>({kStreamToReset})); |
| |
| EXPECT_CALL(producer_, HasStreamsReadyToBeReset()).WillOnce(Return(true)); |
| EXPECT_CALL(producer_, GetStreamsReadyToBeReset()) |
| .WillOnce(Return(std::vector<StreamID>({kStreamToReset}))); |
| |
| std::optional<ReConfigChunk> reconfig1 = handler_->MakeStreamResetRequest(); |
| ASSERT_TRUE(reconfig1.has_value()); |
| ASSERT_HAS_VALUE_AND_ASSIGN( |
| OutgoingSSNResetRequestParameter req1, |
| reconfig1->parameters().get<OutgoingSSNResetRequestParameter>()); |
| |
| // Simulate that the peer responded "In Progress". |
| Parameters::Builder builder; |
| builder.Add(ReconfigurationResponseParameter(req1.request_sequence_number(), |
| ResponseResult::kInProgress)); |
| ReConfigChunk response_reconfig(builder.Build()); |
| |
| EXPECT_CALL(producer_, CommitResetStreams()).Times(0); |
| EXPECT_CALL(producer_, RollbackResetStreams()).Times(0); |
| |
| // Processing a response shouldn't result in sending anything. |
| EXPECT_CALL(callbacks_, OnError).Times(0); |
| EXPECT_CALL(callbacks_, SendPacketWithStatus).Times(0); |
| handler_->HandleReConfig(std::move(response_reconfig)); |
| |
| // Let some time pass, so that the reconfig timer expires, and retries the |
| // same request. |
| EXPECT_CALL(callbacks_, SendPacketWithStatus).Times(1); |
| AdvanceTime(kRto); |
| |
| std::vector<uint8_t> payload = callbacks_.ConsumeSentPacket(); |
| ASSERT_FALSE(payload.empty()); |
| |
| ASSERT_HAS_VALUE_AND_ASSIGN(SctpPacket packet, |
| SctpPacket::Parse(payload, DcSctpOptions())); |
| ASSERT_THAT(packet.descriptors(), SizeIs(1)); |
| ASSERT_HAS_VALUE_AND_ASSIGN( |
| ReConfigChunk reconfig2, |
| ReConfigChunk::Parse(packet.descriptors()[0].data)); |
| |
| ASSERT_HAS_VALUE_AND_ASSIGN( |
| OutgoingSSNResetRequestParameter req2, |
| reconfig2.parameters().get<OutgoingSSNResetRequestParameter>()); |
| |
| EXPECT_EQ(req2.request_sequence_number(), |
| AddTo(req1.request_sequence_number(), 1)); |
| EXPECT_THAT(req2.stream_ids(), UnorderedElementsAre(kStreamToReset)); |
| } |
| |
| TEST_F(StreamResetHandlerTest, ResetWhileRequestIsSentWillQueue) { |
| EXPECT_CALL(producer_, PrepareResetStream(StreamID(42))); |
| handler_->ResetStreams(std::vector<StreamID>({StreamID(42)})); |
| |
| EXPECT_CALL(producer_, HasStreamsReadyToBeReset()).WillOnce(Return(true)); |
| EXPECT_CALL(producer_, GetStreamsReadyToBeReset()) |
| .WillOnce(Return(std::vector<StreamID>({StreamID(42)}))); |
| |
| std::optional<ReConfigChunk> reconfig1 = handler_->MakeStreamResetRequest(); |
| ASSERT_TRUE(reconfig1.has_value()); |
| ASSERT_HAS_VALUE_AND_ASSIGN( |
| OutgoingSSNResetRequestParameter req1, |
| reconfig1->parameters().get<OutgoingSSNResetRequestParameter>()); |
| EXPECT_EQ(req1.request_sequence_number(), kMyInitialReqSn); |
| EXPECT_EQ(req1.sender_last_assigned_tsn(), |
| AddTo(retransmission_queue_->next_tsn(), -1)); |
| EXPECT_THAT(req1.stream_ids(), UnorderedElementsAre(StreamID(42))); |
| |
| // Streams reset while the request is in-flight will be queued. |
| EXPECT_CALL(producer_, PrepareResetStream(StreamID(41))); |
| EXPECT_CALL(producer_, PrepareResetStream(StreamID(43))); |
| StreamID stream_ids[] = {StreamID(41), StreamID(43)}; |
| handler_->ResetStreams(stream_ids); |
| EXPECT_EQ(handler_->MakeStreamResetRequest(), std::nullopt); |
| |
| Parameters::Builder builder; |
| builder.Add(ReconfigurationResponseParameter( |
| req1.request_sequence_number(), ResponseResult::kSuccessPerformed)); |
| ReConfigChunk response_reconfig(builder.Build()); |
| |
| EXPECT_CALL(producer_, CommitResetStreams()).Times(1); |
| EXPECT_CALL(producer_, RollbackResetStreams()).Times(0); |
| |
| // Processing a response shouldn't result in sending anything. |
| EXPECT_CALL(callbacks_, OnError).Times(0); |
| EXPECT_CALL(callbacks_, SendPacketWithStatus).Times(0); |
| handler_->HandleReConfig(std::move(response_reconfig)); |
| |
| // Response has been processed. A new request can be sent. |
| EXPECT_CALL(producer_, HasStreamsReadyToBeReset()).WillOnce(Return(true)); |
| EXPECT_CALL(producer_, GetStreamsReadyToBeReset()) |
| .WillOnce(Return(std::vector<StreamID>({StreamID(41), StreamID(43)}))); |
| |
| std::optional<ReConfigChunk> reconfig2 = handler_->MakeStreamResetRequest(); |
| ASSERT_TRUE(reconfig2.has_value()); |
| ASSERT_HAS_VALUE_AND_ASSIGN( |
| OutgoingSSNResetRequestParameter req2, |
| reconfig2->parameters().get<OutgoingSSNResetRequestParameter>()); |
| EXPECT_EQ(req2.request_sequence_number(), AddTo(kMyInitialReqSn, 1)); |
| EXPECT_EQ(req2.sender_last_assigned_tsn(), |
| TSN(*retransmission_queue_->next_tsn() - 1)); |
| EXPECT_THAT(req2.stream_ids(), |
| UnorderedElementsAre(StreamID(41), StreamID(43))); |
| } |
| |
| TEST_F(StreamResetHandlerTest, SendIncomingResetJustReturnsNothingPerformed) { |
| Parameters::Builder builder; |
| builder.Add( |
| IncomingSSNResetRequestParameter(kPeerInitialReqSn, {StreamID(1)})); |
| |
| std::vector<ReconfigurationResponseParameter> responses = |
| HandleAndCatchResponse(ReConfigChunk(builder.Build())); |
| ASSERT_THAT(responses, SizeIs(1)); |
| EXPECT_THAT(responses[0].response_sequence_number(), kPeerInitialReqSn); |
| EXPECT_THAT(responses[0].result(), ResponseResult::kSuccessNothingToDo); |
| } |
| |
| TEST_F(StreamResetHandlerTest, SendSameRequestTwiceIsIdempotent) { |
| // Simulate that receiving the same chunk twice (due to network issues, |
| // or retransmissions, causing a RECONFIG to be re-received) is idempotent. |
| for (int i = 0; i < 2; ++i) { |
| Parameters::Builder builder; |
| builder.Add(OutgoingSSNResetRequestParameter( |
| kPeerInitialReqSn, ReconfigRequestSN(3), AddTo(kPeerInitialTsn, 1), |
| {StreamID(1)})); |
| |
| std::vector<ReconfigurationResponseParameter> responses1 = |
| HandleAndCatchResponse(ReConfigChunk(builder.Build())); |
| EXPECT_THAT(responses1, SizeIs(1)); |
| EXPECT_EQ(responses1[0].result(), ResponseResult::kInProgress); |
| } |
| } |
| |
| TEST_F(StreamResetHandlerTest, |
| HandoverIsAllowedOnlyWhenNoStreamIsBeingOrWillBeReset) { |
| EXPECT_CALL(producer_, PrepareResetStream(StreamID(42))); |
| handler_->ResetStreams(std::vector<StreamID>({StreamID(42)})); |
| EXPECT_CALL(producer_, HasStreamsReadyToBeReset()).WillOnce(Return(true)); |
| EXPECT_EQ( |
| handler_->GetHandoverReadiness(), |
| HandoverReadinessStatus(HandoverUnreadinessReason::kPendingStreamReset)); |
| |
| EXPECT_CALL(producer_, HasStreamsReadyToBeReset()) |
| .WillOnce(Return(true)) |
| .WillOnce(Return(false)); |
| EXPECT_CALL(producer_, GetStreamsReadyToBeReset()) |
| .WillOnce(Return(std::vector<StreamID>({StreamID(42)}))); |
| |
| ASSERT_TRUE(handler_->MakeStreamResetRequest().has_value()); |
| EXPECT_EQ(handler_->GetHandoverReadiness(), |
| HandoverReadinessStatus( |
| HandoverUnreadinessReason::kPendingStreamResetRequest)); |
| |
| // Reset more streams while the request is in-flight. |
| EXPECT_CALL(producer_, PrepareResetStream(StreamID(41))); |
| EXPECT_CALL(producer_, PrepareResetStream(StreamID(43))); |
| StreamID stream_ids[] = {StreamID(41), StreamID(43)}; |
| handler_->ResetStreams(stream_ids); |
| |
| EXPECT_CALL(producer_, HasStreamsReadyToBeReset()).WillOnce(Return(true)); |
| EXPECT_EQ(handler_->GetHandoverReadiness(), |
| HandoverReadinessStatus() |
| .Add(HandoverUnreadinessReason::kPendingStreamResetRequest) |
| .Add(HandoverUnreadinessReason::kPendingStreamReset)); |
| |
| // Processing a response to first request. |
| EXPECT_CALL(producer_, CommitResetStreams()).Times(1); |
| handler_->HandleReConfig( |
| ReConfigChunk(Parameters::Builder() |
| .Add(ReconfigurationResponseParameter( |
| kMyInitialReqSn, ResponseResult::kSuccessPerformed)) |
| .Build())); |
| EXPECT_CALL(producer_, HasStreamsReadyToBeReset()).WillOnce(Return(true)); |
| EXPECT_EQ( |
| handler_->GetHandoverReadiness(), |
| HandoverReadinessStatus(HandoverUnreadinessReason::kPendingStreamReset)); |
| |
| // Second request can be sent. |
| EXPECT_CALL(producer_, HasStreamsReadyToBeReset()) |
| .WillOnce(Return(true)) |
| .WillOnce(Return(false)); |
| EXPECT_CALL(producer_, GetStreamsReadyToBeReset()) |
| .WillOnce(Return(std::vector<StreamID>({StreamID(41), StreamID(43)}))); |
| |
| ASSERT_TRUE(handler_->MakeStreamResetRequest().has_value()); |
| EXPECT_EQ(handler_->GetHandoverReadiness(), |
| HandoverReadinessStatus( |
| HandoverUnreadinessReason::kPendingStreamResetRequest)); |
| |
| // Processing a response to second request. |
| EXPECT_CALL(producer_, CommitResetStreams()).Times(1); |
| handler_->HandleReConfig(ReConfigChunk( |
| Parameters::Builder() |
| .Add(ReconfigurationResponseParameter( |
| AddTo(kMyInitialReqSn, 1), ResponseResult::kSuccessPerformed)) |
| .Build())); |
| |
| // Seconds response has been processed. No pending resets. |
| EXPECT_CALL(producer_, HasStreamsReadyToBeReset()).WillOnce(Return(false)); |
| |
| EXPECT_TRUE(handler_->GetHandoverReadiness().IsReady()); |
| } |
| |
| TEST_F(StreamResetHandlerTest, HandoverInInitialState) { |
| PerformHandover(); |
| |
| EXPECT_CALL(producer_, PrepareResetStream(StreamID(42))); |
| handler_->ResetStreams(std::vector<StreamID>({StreamID(42)})); |
| |
| EXPECT_CALL(producer_, HasStreamsReadyToBeReset()).WillOnce(Return(true)); |
| EXPECT_CALL(producer_, GetStreamsReadyToBeReset()) |
| .WillOnce(Return(std::vector<StreamID>({StreamID(42)}))); |
| |
| std::optional<ReConfigChunk> reconfig = handler_->MakeStreamResetRequest(); |
| ASSERT_TRUE(reconfig.has_value()); |
| ASSERT_HAS_VALUE_AND_ASSIGN( |
| OutgoingSSNResetRequestParameter req, |
| reconfig->parameters().get<OutgoingSSNResetRequestParameter>()); |
| |
| EXPECT_EQ(req.request_sequence_number(), kMyInitialReqSn); |
| EXPECT_EQ(req.sender_last_assigned_tsn(), |
| TSN(*retransmission_queue_->next_tsn() - 1)); |
| EXPECT_THAT(req.stream_ids(), UnorderedElementsAre(StreamID(42))); |
| } |
| |
| TEST_F(StreamResetHandlerTest, HandoverAfterHavingResetOneStream) { |
| // Reset one stream |
| { |
| EXPECT_CALL(producer_, PrepareResetStream(StreamID(42))); |
| handler_->ResetStreams(std::vector<StreamID>({StreamID(42)})); |
| |
| EXPECT_CALL(producer_, HasStreamsReadyToBeReset()) |
| .WillOnce(Return(true)) |
| .WillOnce(Return(false)); |
| EXPECT_CALL(producer_, GetStreamsReadyToBeReset()) |
| .WillOnce(Return(std::vector<StreamID>({StreamID(42)}))); |
| |
| ASSERT_HAS_VALUE_AND_ASSIGN(ReConfigChunk reconfig, |
| handler_->MakeStreamResetRequest()); |
| ASSERT_HAS_VALUE_AND_ASSIGN( |
| OutgoingSSNResetRequestParameter req, |
| reconfig.parameters().get<OutgoingSSNResetRequestParameter>()); |
| EXPECT_EQ(req.request_sequence_number(), kMyInitialReqSn); |
| EXPECT_EQ(req.sender_last_assigned_tsn(), |
| TSN(*retransmission_queue_->next_tsn() - 1)); |
| EXPECT_THAT(req.stream_ids(), UnorderedElementsAre(StreamID(42))); |
| |
| EXPECT_CALL(producer_, CommitResetStreams()).Times(1); |
| handler_->HandleReConfig( |
| ReConfigChunk(Parameters::Builder() |
| .Add(ReconfigurationResponseParameter( |
| req.request_sequence_number(), |
| ResponseResult::kSuccessPerformed)) |
| .Build())); |
| } |
| |
| PerformHandover(); |
| |
| // Reset another stream after handover |
| { |
| EXPECT_CALL(producer_, PrepareResetStream(StreamID(43))); |
| handler_->ResetStreams(std::vector<StreamID>({StreamID(43)})); |
| |
| EXPECT_CALL(producer_, HasStreamsReadyToBeReset()).WillOnce(Return(true)); |
| EXPECT_CALL(producer_, GetStreamsReadyToBeReset()) |
| .WillOnce(Return(std::vector<StreamID>({StreamID(43)}))); |
| |
| ASSERT_HAS_VALUE_AND_ASSIGN(ReConfigChunk reconfig, |
| handler_->MakeStreamResetRequest()); |
| ASSERT_HAS_VALUE_AND_ASSIGN( |
| OutgoingSSNResetRequestParameter req, |
| reconfig.parameters().get<OutgoingSSNResetRequestParameter>()); |
| |
| EXPECT_EQ(req.request_sequence_number(), |
| ReconfigRequestSN(kMyInitialReqSn.value() + 1)); |
| EXPECT_EQ(req.sender_last_assigned_tsn(), |
| TSN(*retransmission_queue_->next_tsn() - 1)); |
| EXPECT_THAT(req.stream_ids(), UnorderedElementsAre(StreamID(43))); |
| } |
| } |
| |
| TEST_F(StreamResetHandlerTest, PerformCloseAfterOneFirstFailing) { |
| // Inject a stream reset on the first expected TSN (which hasn't been seen). |
| Parameters::Builder builder; |
| builder.Add(OutgoingSSNResetRequestParameter( |
| kPeerInitialReqSn, ReconfigRequestSN(3), kPeerInitialTsn, {StreamID(1)})); |
| |
| // The socket is expected to say "in progress" as that TSN hasn't been seen. |
| std::vector<ReconfigurationResponseParameter> responses = |
| HandleAndCatchResponse(ReConfigChunk(builder.Build())); |
| EXPECT_THAT(responses, SizeIs(1)); |
| EXPECT_EQ(responses[0].result(), ResponseResult::kInProgress); |
| |
| // Let the socket receive the TSN. |
| DataGeneratorOptions opts; |
| opts.mid = MID(0); |
| reasm_->Add(kPeerInitialTsn, gen_.Ordered({1, 2, 3, 4}, "BE", opts)); |
| data_tracker_->Observe(kPeerInitialTsn); |
| |
| // And emulate that time has passed, and the peer retries the stream reset, |
| // but now with an incremented request sequence number. |
| Parameters::Builder builder2; |
| builder2.Add(OutgoingSSNResetRequestParameter( |
| ReconfigRequestSN(*kPeerInitialReqSn + 1), ReconfigRequestSN(3), |
| kPeerInitialTsn, {StreamID(1)})); |
| |
| // This is supposed to be handled well. |
| std::vector<ReconfigurationResponseParameter> responses2 = |
| HandleAndCatchResponse(ReConfigChunk(builder2.Build())); |
| EXPECT_THAT(responses2, SizeIs(1)); |
| EXPECT_EQ(responses2[0].result(), ResponseResult::kSuccessPerformed); |
| } |
| } // namespace |
| } // namespace dcsctp |
