| /* |
| * |
| * Copyright (c) 2020 Project CHIP Authors |
| * All rights reserved. |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| /** |
| * @file |
| * This file defines read handler for a CHIP Interaction Data model |
| * |
| */ |
| |
| #include <app/AppConfig.h> |
| #include <app/InteractionModelEngine.h> |
| #include <app/MessageDef/EventPathIB.h> |
| #include <app/MessageDef/StatusResponseMessage.h> |
| #include <app/MessageDef/SubscribeRequestMessage.h> |
| #include <app/MessageDef/SubscribeResponseMessage.h> |
| #include <lib/core/CHIPTLVUtilities.hpp> |
| #include <messaging/ExchangeContext.h> |
| |
| #include <app/ReadHandler.h> |
| #include <app/reporting/Engine.h> |
| |
| namespace chip { |
| namespace app { |
| using Status = Protocols::InteractionModel::Status; |
| |
| ReadHandler::ReadHandler(ManagementCallback & apCallback, Messaging::ExchangeContext * apExchangeContext, |
| InteractionType aInteractionType) : |
| mExchangeCtx(*this), |
| mManagementCallback(apCallback) |
| { |
| VerifyOrDie(apExchangeContext != nullptr); |
| |
| mExchangeCtx.Grab(apExchangeContext); |
| #if CHIP_CONFIG_UNSAFE_SUBSCRIPTION_EXCHANGE_MANAGER_USE |
| // TODO: this should be replaced by a pointer to the InteractionModelEngine that created the ReadHandler |
| // once InteractionModelEngine is no longer a singleton (see issue 23625) |
| mExchangeMgr = apExchangeContext->GetExchangeMgr(); |
| #endif // CHIP_CONFIG_UNSAFE_SUBSCRIPTION_EXCHANGE_MANAGER_USE |
| |
| mInteractionType = aInteractionType; |
| mLastWrittenEventsBytes = 0; |
| mTransactionStartGeneration = InteractionModelEngine::GetInstance()->GetReportingEngine().GetDirtySetGeneration(); |
| mFlags.ClearAll(); |
| SetStateFlag(ReadHandlerFlags::PrimingReports); |
| |
| mSessionHandle.Grab(mExchangeCtx->GetSessionHandle()); |
| } |
| |
| ReadHandler::~ReadHandler() |
| { |
| auto * appCallback = mManagementCallback.GetAppCallback(); |
| if (mFlags.Has(ReadHandlerFlags::ActiveSubscription) && appCallback) |
| { |
| appCallback->OnSubscriptionTerminated(*this); |
| } |
| |
| if (IsType(InteractionType::Subscribe)) |
| { |
| InteractionModelEngine::GetInstance()->GetExchangeManager()->GetSessionManager()->SystemLayer()->CancelTimer( |
| OnUnblockHoldReportCallback, this); |
| |
| InteractionModelEngine::GetInstance()->GetExchangeManager()->GetSessionManager()->SystemLayer()->CancelTimer( |
| OnRefreshSubscribeTimerSyncCallback, this); |
| } |
| |
| if (IsAwaitingReportResponse()) |
| { |
| InteractionModelEngine::GetInstance()->GetReportingEngine().OnReportConfirm(); |
| } |
| InteractionModelEngine::GetInstance()->ReleaseAttributePathList(mpAttributePathList); |
| InteractionModelEngine::GetInstance()->ReleaseEventPathList(mpEventPathList); |
| InteractionModelEngine::GetInstance()->ReleaseDataVersionFilterList(mpDataVersionFilterList); |
| } |
| |
| void ReadHandler::Close() |
| { |
| MoveToState(HandlerState::AwaitingDestruction); |
| mManagementCallback.OnDone(*this); |
| } |
| |
| void ReadHandler::OnInitialRequest(System::PacketBufferHandle && aPayload) |
| { |
| CHIP_ERROR err = CHIP_NO_ERROR; |
| System::PacketBufferHandle response; |
| |
| if (IsType(InteractionType::Subscribe)) |
| { |
| err = ProcessSubscribeRequest(std::move(aPayload)); |
| } |
| else |
| { |
| err = ProcessReadRequest(std::move(aPayload)); |
| } |
| |
| if (err != CHIP_NO_ERROR) |
| { |
| Status status = Status::InvalidAction; |
| if (err.IsIMStatus()) |
| { |
| status = StatusIB(err).mStatus; |
| } |
| StatusResponse::Send(status, mExchangeCtx.Get(), /* aExpectResponse = */ false); |
| Close(); |
| } |
| else |
| { |
| // Force us to be in a dirty state so we get processed by the reporting |
| SetStateFlag(ReadHandlerFlags::ForceDirty); |
| } |
| } |
| |
| CHIP_ERROR ReadHandler::OnStatusResponse(Messaging::ExchangeContext * apExchangeContext, System::PacketBufferHandle && aPayload, |
| bool & aSendStatusResponse) |
| { |
| CHIP_ERROR err = CHIP_NO_ERROR; |
| aSendStatusResponse = true; |
| CHIP_ERROR statusError = CHIP_NO_ERROR; |
| SuccessOrExit(err = StatusResponse::ProcessStatusResponse(std::move(aPayload), statusError)); |
| // Since this is a valid Status Response message, we don't have to send a Status Response in reply to it. |
| aSendStatusResponse = false; |
| SuccessOrExit(err = statusError); |
| switch (mState) |
| { |
| case HandlerState::AwaitingReportResponse: |
| if (IsChunkedReport()) |
| { |
| mExchangeCtx->WillSendMessage(); |
| } |
| else if (IsType(InteractionType::Subscribe)) |
| { |
| if (IsPriming()) |
| { |
| err = SendSubscribeResponse(); |
| |
| SetStateFlag(ReadHandlerFlags::ActiveSubscription); |
| |
| auto * appCallback = mManagementCallback.GetAppCallback(); |
| if (appCallback) |
| { |
| appCallback->OnSubscriptionEstablished(*this); |
| } |
| } |
| } |
| else |
| { |
| // |
| // We're done processing a read, so let's close out and return. |
| // |
| Close(); |
| return CHIP_NO_ERROR; |
| } |
| |
| MoveToState(HandlerState::GeneratingReports); |
| break; |
| |
| case HandlerState::GeneratingReports: |
| case HandlerState::Idle: |
| default: |
| err = CHIP_ERROR_INCORRECT_STATE; |
| break; |
| } |
| |
| exit: |
| return err; |
| } |
| |
| CHIP_ERROR ReadHandler::SendStatusReport(Protocols::InteractionModel::Status aStatus) |
| { |
| VerifyOrReturnLogError(IsReportable(), CHIP_ERROR_INCORRECT_STATE); |
| if (IsPriming() || IsChunkedReport()) |
| { |
| mSessionHandle.Grab(mExchangeCtx->GetSessionHandle()); |
| } |
| else |
| { |
| VerifyOrReturnLogError(!mExchangeCtx, CHIP_ERROR_INCORRECT_STATE); |
| VerifyOrReturnLogError(mSessionHandle, CHIP_ERROR_INCORRECT_STATE); |
| #if CHIP_CONFIG_UNSAFE_SUBSCRIPTION_EXCHANGE_MANAGER_USE |
| auto exchange = mExchangeMgr->NewContext(mSessionHandle.Get().Value(), this); |
| #else // CHIP_CONFIG_UNSAFE_SUBSCRIPTION_EXCHANGE_MANAGER_USE |
| auto exchange = InteractionModelEngine::GetInstance()->GetExchangeManager()->NewContext(mSessionHandle.Get().Value(), this); |
| #endif // CHIP_CONFIG_UNSAFE_SUBSCRIPTION_EXCHANGE_MANAGER_USE |
| VerifyOrReturnLogError(exchange != nullptr, CHIP_ERROR_INCORRECT_STATE); |
| mExchangeCtx.Grab(exchange); |
| } |
| |
| VerifyOrReturnLogError(mExchangeCtx, CHIP_ERROR_INCORRECT_STATE); |
| return StatusResponse::Send(aStatus, mExchangeCtx.Get(), /* aExpectResponse = */ false); |
| } |
| |
| CHIP_ERROR ReadHandler::SendReportData(System::PacketBufferHandle && aPayload, bool aMoreChunks) |
| { |
| VerifyOrReturnLogError(IsReportable(), CHIP_ERROR_INCORRECT_STATE); |
| if (IsPriming() || IsChunkedReport()) |
| { |
| mSessionHandle.Grab(mExchangeCtx->GetSessionHandle()); |
| } |
| else |
| { |
| VerifyOrReturnLogError(!mExchangeCtx, CHIP_ERROR_INCORRECT_STATE); |
| VerifyOrReturnLogError(mSessionHandle, CHIP_ERROR_INCORRECT_STATE); |
| #if CHIP_CONFIG_UNSAFE_SUBSCRIPTION_EXCHANGE_MANAGER_USE |
| auto exchange = mExchangeMgr->NewContext(mSessionHandle.Get().Value(), this); |
| #else // CHIP_CONFIG_UNSAFE_SUBSCRIPTION_EXCHANGE_MANAGER_USE |
| auto exchange = InteractionModelEngine::GetInstance()->GetExchangeManager()->NewContext(mSessionHandle.Get().Value(), this); |
| #endif // CHIP_CONFIG_UNSAFE_SUBSCRIPTION_EXCHANGE_MANAGER_USE |
| VerifyOrReturnLogError(exchange != nullptr, CHIP_ERROR_INCORRECT_STATE); |
| mExchangeCtx.Grab(exchange); |
| } |
| |
| VerifyOrReturnLogError(mExchangeCtx, CHIP_ERROR_INCORRECT_STATE); |
| |
| if (!IsReporting()) |
| { |
| mCurrentReportsBeginGeneration = InteractionModelEngine::GetInstance()->GetReportingEngine().GetDirtySetGeneration(); |
| } |
| SetStateFlag(ReadHandlerFlags::ChunkedReport, aMoreChunks); |
| bool noResponseExpected = IsType(InteractionType::Read) && !aMoreChunks; |
| if (!noResponseExpected) |
| { |
| MoveToState(HandlerState::AwaitingReportResponse); |
| } |
| |
| mExchangeCtx->UseSuggestedResponseTimeout(app::kExpectedIMProcessingTime); |
| CHIP_ERROR err = |
| mExchangeCtx->SendMessage(Protocols::InteractionModel::MsgType::ReportData, std::move(aPayload), |
| Messaging::SendFlags(noResponseExpected ? Messaging::SendMessageFlags::kNone |
| : Messaging::SendMessageFlags::kExpectResponse)); |
| if (err == CHIP_NO_ERROR && noResponseExpected) |
| { |
| InteractionModelEngine::GetInstance()->GetReportingEngine().OnReportConfirm(); |
| } |
| |
| if (err == CHIP_NO_ERROR) |
| { |
| if (IsType(InteractionType::Subscribe) && !IsPriming()) |
| { |
| err = RefreshSubscribeSyncTimer(); |
| } |
| } |
| if (!aMoreChunks) |
| { |
| mPreviousReportsBeginGeneration = mCurrentReportsBeginGeneration; |
| ClearForceDirtyFlag(); |
| InteractionModelEngine::GetInstance()->ReleaseDataVersionFilterList(mpDataVersionFilterList); |
| } |
| |
| return err; |
| } |
| |
| CHIP_ERROR ReadHandler::OnMessageReceived(Messaging::ExchangeContext * apExchangeContext, const PayloadHeader & aPayloadHeader, |
| System::PacketBufferHandle && aPayload) |
| { |
| CHIP_ERROR err = CHIP_NO_ERROR; |
| bool sendStatusResponse = true; |
| if (aPayloadHeader.HasMessageType(Protocols::InteractionModel::MsgType::StatusResponse)) |
| { |
| err = OnStatusResponse(apExchangeContext, std::move(aPayload), sendStatusResponse); |
| } |
| else |
| { |
| ChipLogDetail(DataManagement, "ReadHandler:: Msg type %d not supported", aPayloadHeader.GetMessageType()); |
| err = CHIP_ERROR_INVALID_MESSAGE_TYPE; |
| } |
| |
| if (sendStatusResponse) |
| { |
| StatusResponse::Send(Status::InvalidAction, apExchangeContext, false /*aExpectResponse*/); |
| } |
| |
| if (err != CHIP_NO_ERROR) |
| { |
| Close(); |
| } |
| return err; |
| } |
| |
| bool ReadHandler::IsFromSubscriber(Messaging::ExchangeContext & apExchangeContext) const |
| { |
| return (IsType(InteractionType::Subscribe) && |
| GetInitiatorNodeId() == apExchangeContext.GetSessionHandle()->AsSecureSession()->GetPeerNodeId() && |
| GetAccessingFabricIndex() == apExchangeContext.GetSessionHandle()->GetFabricIndex()); |
| } |
| |
| void ReadHandler::OnResponseTimeout(Messaging::ExchangeContext * apExchangeContext) |
| { |
| ChipLogError(DataManagement, "Time out! failed to receive status response from Exchange: " ChipLogFormatExchange, |
| ChipLogValueExchange(apExchangeContext)); |
| Close(); |
| } |
| |
| CHIP_ERROR ReadHandler::ProcessReadRequest(System::PacketBufferHandle && aPayload) |
| { |
| CHIP_ERROR err = CHIP_NO_ERROR; |
| System::PacketBufferTLVReader reader; |
| |
| ReadRequestMessage::Parser readRequestParser; |
| EventPathIBs::Parser eventPathListParser; |
| EventFilterIBs::Parser eventFilterIBsParser; |
| AttributePathIBs::Parser attributePathListParser; |
| |
| reader.Init(std::move(aPayload)); |
| |
| ReturnErrorOnFailure(readRequestParser.Init(reader)); |
| #if CHIP_CONFIG_IM_PRETTY_PRINT |
| readRequestParser.PrettyPrint(); |
| #endif |
| |
| err = readRequestParser.GetAttributeRequests(&attributePathListParser); |
| if (err == CHIP_END_OF_TLV) |
| { |
| err = CHIP_NO_ERROR; |
| } |
| else if (err == CHIP_NO_ERROR) |
| { |
| ReturnErrorOnFailure(ProcessAttributePaths(attributePathListParser)); |
| DataVersionFilterIBs::Parser dataVersionFilterListParser; |
| err = readRequestParser.GetDataVersionFilters(&dataVersionFilterListParser); |
| if (err == CHIP_END_OF_TLV) |
| { |
| err = CHIP_NO_ERROR; |
| } |
| else if (err == CHIP_NO_ERROR) |
| { |
| ReturnErrorOnFailure(ProcessDataVersionFilterList(dataVersionFilterListParser)); |
| } |
| } |
| ReturnErrorOnFailure(err); |
| err = readRequestParser.GetEventRequests(&eventPathListParser); |
| if (err == CHIP_END_OF_TLV) |
| { |
| err = CHIP_NO_ERROR; |
| } |
| else if (err == CHIP_NO_ERROR) |
| { |
| ReturnErrorOnFailure(err); |
| ReturnErrorOnFailure(ProcessEventPaths(eventPathListParser)); |
| err = readRequestParser.GetEventFilters(&eventFilterIBsParser); |
| if (err == CHIP_END_OF_TLV) |
| { |
| err = CHIP_NO_ERROR; |
| } |
| else if (err == CHIP_NO_ERROR) |
| { |
| ReturnErrorOnFailure(ProcessEventFilters(eventFilterIBsParser)); |
| } |
| } |
| ReturnErrorOnFailure(err); |
| |
| bool isFabricFiltered; |
| ReturnErrorOnFailure(readRequestParser.GetIsFabricFiltered(&isFabricFiltered)); |
| SetStateFlag(ReadHandlerFlags::FabricFiltered, isFabricFiltered); |
| ReturnErrorOnFailure(readRequestParser.ExitContainer()); |
| MoveToState(HandlerState::GeneratingReports); |
| |
| mExchangeCtx->WillSendMessage(); |
| |
| // There must be no code after the WillSendMessage() call that can cause |
| // this method to return a failure. |
| |
| return CHIP_NO_ERROR; |
| } |
| |
| CHIP_ERROR ReadHandler::ProcessAttributePaths(AttributePathIBs::Parser & aAttributePathListParser) |
| { |
| CHIP_ERROR err = CHIP_NO_ERROR; |
| TLV::TLVReader reader; |
| aAttributePathListParser.GetReader(&reader); |
| while (CHIP_NO_ERROR == (err = reader.Next())) |
| { |
| VerifyOrReturnError(TLV::AnonymousTag() == reader.GetTag(), CHIP_ERROR_INVALID_TLV_TAG); |
| AttributePathParams attribute; |
| AttributePathIB::Parser path; |
| ReturnErrorOnFailure(path.Init(reader)); |
| ReturnErrorOnFailure(path.ParsePath(attribute)); |
| ReturnErrorOnFailure(InteractionModelEngine::GetInstance()->PushFrontAttributePathList(mpAttributePathList, attribute)); |
| } |
| // if we have exhausted this container |
| if (CHIP_END_OF_TLV == err) |
| { |
| InteractionModelEngine::GetInstance()->RemoveDuplicateConcreteAttributePath(mpAttributePathList); |
| mAttributePathExpandIterator = AttributePathExpandIterator(mpAttributePathList); |
| err = CHIP_NO_ERROR; |
| } |
| return err; |
| } |
| |
| CHIP_ERROR ReadHandler::ProcessDataVersionFilterList(DataVersionFilterIBs::Parser & aDataVersionFilterListParser) |
| { |
| CHIP_ERROR err = CHIP_NO_ERROR; |
| TLV::TLVReader reader; |
| |
| aDataVersionFilterListParser.GetReader(&reader); |
| while (CHIP_NO_ERROR == (err = reader.Next())) |
| { |
| VerifyOrReturnError(TLV::AnonymousTag() == reader.GetTag(), CHIP_ERROR_INVALID_TLV_TAG); |
| DataVersionFilter versionFilter; |
| ClusterPathIB::Parser path; |
| DataVersionFilterIB::Parser filter; |
| ReturnErrorOnFailure(filter.Init(reader)); |
| DataVersion version = 0; |
| ReturnErrorOnFailure(filter.GetDataVersion(&version)); |
| versionFilter.mDataVersion.SetValue(version); |
| ReturnErrorOnFailure(filter.GetPath(&path)); |
| ReturnErrorOnFailure(path.GetEndpoint(&(versionFilter.mEndpointId))); |
| ReturnErrorOnFailure(path.GetCluster(&(versionFilter.mClusterId))); |
| VerifyOrReturnError(versionFilter.IsValidDataVersionFilter(), CHIP_ERROR_IM_MALFORMED_DATA_VERSION_FILTER_IB); |
| ReturnErrorOnFailure( |
| InteractionModelEngine::GetInstance()->PushFrontDataVersionFilterList(mpDataVersionFilterList, versionFilter)); |
| } |
| |
| if (CHIP_END_OF_TLV == err) |
| { |
| err = CHIP_NO_ERROR; |
| } |
| return err; |
| } |
| |
| CHIP_ERROR ReadHandler::ProcessEventPaths(EventPathIBs::Parser & aEventPathsParser) |
| { |
| CHIP_ERROR err = CHIP_NO_ERROR; |
| TLV::TLVReader reader; |
| aEventPathsParser.GetReader(&reader); |
| while (CHIP_NO_ERROR == (err = reader.Next())) |
| { |
| VerifyOrReturnError(TLV::AnonymousTag() == reader.GetTag(), CHIP_ERROR_INVALID_TLV_TAG); |
| EventPathParams event; |
| EventPathIB::Parser path; |
| ReturnErrorOnFailure(path.Init(reader)); |
| ReturnErrorOnFailure(path.ParsePath(event)); |
| ReturnErrorOnFailure(InteractionModelEngine::GetInstance()->PushFrontEventPathParamsList(mpEventPathList, event)); |
| } |
| |
| // if we have exhausted this container |
| if (CHIP_END_OF_TLV == err) |
| { |
| err = CHIP_NO_ERROR; |
| } |
| return err; |
| } |
| |
| CHIP_ERROR ReadHandler::ProcessEventFilters(EventFilterIBs::Parser & aEventFiltersParser) |
| { |
| CHIP_ERROR err = CHIP_NO_ERROR; |
| TLV::TLVReader reader; |
| aEventFiltersParser.GetReader(&reader); |
| |
| while (CHIP_NO_ERROR == (err = reader.Next())) |
| { |
| VerifyOrReturnError(TLV::AnonymousTag() == reader.GetTag(), CHIP_ERROR_INVALID_TLV_TAG); |
| EventFilterIB::Parser filter; |
| ReturnErrorOnFailure(filter.Init(reader)); |
| // this is for current node, and would have only one event filter. |
| ReturnErrorOnFailure(filter.GetEventMin(&(mEventMin))); |
| } |
| if (CHIP_END_OF_TLV == err) |
| { |
| err = CHIP_NO_ERROR; |
| } |
| return err; |
| } |
| |
| const char * ReadHandler::GetStateStr() const |
| { |
| #if CHIP_DETAIL_LOGGING |
| switch (mState) |
| { |
| case HandlerState::Idle: |
| return "Idle"; |
| case HandlerState::AwaitingDestruction: |
| return "AwaitingDestruction"; |
| case HandlerState::GeneratingReports: |
| return "GeneratingReports"; |
| |
| case HandlerState::AwaitingReportResponse: |
| return "AwaitingReportResponse"; |
| } |
| #endif // CHIP_DETAIL_LOGGING |
| return "N/A"; |
| } |
| |
| void ReadHandler::MoveToState(const HandlerState aTargetState) |
| { |
| if (aTargetState == mState) |
| { |
| return; |
| } |
| |
| if (IsAwaitingReportResponse() && aTargetState != HandlerState::AwaitingReportResponse) |
| { |
| InteractionModelEngine::GetInstance()->GetReportingEngine().OnReportConfirm(); |
| } |
| |
| mState = aTargetState; |
| ChipLogDetail(DataManagement, "IM RH moving to [%s]", GetStateStr()); |
| |
| // |
| // If we just unblocked sending reports, let's go ahead and schedule the reporting |
| // engine to run to kick that off. |
| // |
| if (aTargetState == HandlerState::GeneratingReports && IsReportable()) |
| { |
| InteractionModelEngine::GetInstance()->GetReportingEngine().ScheduleRun(); |
| } |
| } |
| |
| bool ReadHandler::CheckEventClean(EventManagement & aEventManager) |
| { |
| if (mFlags.Has(ReadHandlerFlags::ChunkedReport)) |
| { |
| if ((mLastScheduledEventNumber != 0) && (mEventMin <= mLastScheduledEventNumber)) |
| { |
| return false; |
| } |
| } |
| else |
| { |
| EventNumber lastEventNumber = aEventManager.GetLastEventNumber(); |
| if ((lastEventNumber != 0) && (mEventMin <= lastEventNumber)) |
| { |
| // We have more events. snapshot last event number |
| aEventManager.SetScheduledEventInfo(mLastScheduledEventNumber, mLastWrittenEventsBytes); |
| return false; |
| } |
| } |
| return true; |
| } |
| |
| CHIP_ERROR ReadHandler::SendSubscribeResponse() |
| { |
| System::PacketBufferHandle packet = System::PacketBufferHandle::New(chip::app::kMaxSecureSduLengthBytes); |
| VerifyOrReturnLogError(!packet.IsNull(), CHIP_ERROR_NO_MEMORY); |
| |
| System::PacketBufferTLVWriter writer; |
| writer.Init(std::move(packet)); |
| |
| SubscribeResponseMessage::Builder response; |
| ReturnErrorOnFailure(response.Init(&writer)); |
| response.SubscriptionId(mSubscriptionId).MaxInterval(mMaxInterval).EndOfSubscribeResponseMessage(); |
| ReturnErrorOnFailure(response.GetError()); |
| |
| ReturnErrorOnFailure(writer.Finalize(&packet)); |
| VerifyOrReturnLogError(mExchangeCtx, CHIP_ERROR_INCORRECT_STATE); |
| |
| ReturnErrorOnFailure(RefreshSubscribeSyncTimer()); |
| |
| ClearStateFlag(ReadHandlerFlags::PrimingReports); |
| return mExchangeCtx->SendMessage(Protocols::InteractionModel::MsgType::SubscribeResponse, std::move(packet)); |
| } |
| |
| CHIP_ERROR ReadHandler::ProcessSubscribeRequest(System::PacketBufferHandle && aPayload) |
| { |
| System::PacketBufferTLVReader reader; |
| reader.Init(std::move(aPayload)); |
| |
| SubscribeRequestMessage::Parser subscribeRequestParser; |
| ReturnErrorOnFailure(subscribeRequestParser.Init(reader)); |
| #if CHIP_CONFIG_IM_PRETTY_PRINT |
| subscribeRequestParser.PrettyPrint(); |
| #endif |
| |
| AttributePathIBs::Parser attributePathListParser; |
| CHIP_ERROR err = subscribeRequestParser.GetAttributeRequests(&attributePathListParser); |
| if (err == CHIP_END_OF_TLV) |
| { |
| err = CHIP_NO_ERROR; |
| } |
| else if (err == CHIP_NO_ERROR) |
| { |
| ReturnErrorOnFailure(ProcessAttributePaths(attributePathListParser)); |
| DataVersionFilterIBs::Parser dataVersionFilterListParser; |
| err = subscribeRequestParser.GetDataVersionFilters(&dataVersionFilterListParser); |
| if (err == CHIP_END_OF_TLV) |
| { |
| err = CHIP_NO_ERROR; |
| } |
| else if (err == CHIP_NO_ERROR) |
| { |
| ReturnErrorOnFailure(ProcessDataVersionFilterList(dataVersionFilterListParser)); |
| } |
| } |
| ReturnErrorOnFailure(err); |
| |
| EventPathIBs::Parser eventPathListParser; |
| err = subscribeRequestParser.GetEventRequests(&eventPathListParser); |
| if (err == CHIP_END_OF_TLV) |
| { |
| err = CHIP_NO_ERROR; |
| } |
| else if (err == CHIP_NO_ERROR) |
| { |
| ReturnErrorOnFailure(ProcessEventPaths(eventPathListParser)); |
| EventFilterIBs::Parser eventFilterIBsParser; |
| err = subscribeRequestParser.GetEventFilters(&eventFilterIBsParser); |
| if (err == CHIP_END_OF_TLV) |
| { |
| err = CHIP_NO_ERROR; |
| } |
| else if (err == CHIP_NO_ERROR) |
| { |
| ReturnErrorOnFailure(ProcessEventFilters(eventFilterIBsParser)); |
| } |
| } |
| ReturnErrorOnFailure(err); |
| |
| ReturnErrorOnFailure(subscribeRequestParser.GetMinIntervalFloorSeconds(&mMinIntervalFloorSeconds)); |
| ReturnErrorOnFailure(subscribeRequestParser.GetMaxIntervalCeilingSeconds(&mMaxInterval)); |
| VerifyOrReturnError(mMinIntervalFloorSeconds <= mMaxInterval, CHIP_ERROR_INVALID_ARGUMENT); |
| |
| // |
| // Notify the application (if requested) of the impending subscription and check whether we should still proceed to set it up. |
| // This also provides the application an opportunity to modify the negotiated min/max intervals set above. |
| // |
| auto * appCallback = mManagementCallback.GetAppCallback(); |
| if (appCallback) |
| { |
| if (appCallback->OnSubscriptionRequested(*this, *mExchangeCtx->GetSessionHandle()->AsSecureSession()) != CHIP_NO_ERROR) |
| { |
| return CHIP_ERROR_TRANSACTION_CANCELED; |
| } |
| } |
| |
| ChipLogProgress(DataManagement, "Final negotiated min/max parameters: Min = %ds, Max = %ds", mMinIntervalFloorSeconds, |
| mMaxInterval); |
| |
| bool isFabricFiltered; |
| ReturnErrorOnFailure(subscribeRequestParser.GetIsFabricFiltered(&isFabricFiltered)); |
| SetStateFlag(ReadHandlerFlags::FabricFiltered, isFabricFiltered); |
| ReturnErrorOnFailure(Crypto::DRBG_get_bytes(reinterpret_cast<uint8_t *>(&mSubscriptionId), sizeof(mSubscriptionId))); |
| ReturnErrorOnFailure(subscribeRequestParser.ExitContainer()); |
| MoveToState(HandlerState::GeneratingReports); |
| |
| mExchangeCtx->WillSendMessage(); |
| |
| return CHIP_NO_ERROR; |
| } |
| |
| void ReadHandler::OnUnblockHoldReportCallback(System::Layer * apSystemLayer, void * apAppState) |
| { |
| VerifyOrReturn(apAppState != nullptr); |
| ReadHandler * readHandler = static_cast<ReadHandler *>(apAppState); |
| ChipLogDetail(DataManagement, "Unblock report hold after min %d seconds", readHandler->mMinIntervalFloorSeconds); |
| readHandler->ClearStateFlag(ReadHandlerFlags::HoldReport); |
| InteractionModelEngine::GetInstance()->GetExchangeManager()->GetSessionManager()->SystemLayer()->StartTimer( |
| System::Clock::Seconds16(readHandler->mMaxInterval - readHandler->mMinIntervalFloorSeconds), |
| OnRefreshSubscribeTimerSyncCallback, readHandler); |
| } |
| |
| void ReadHandler::OnRefreshSubscribeTimerSyncCallback(System::Layer * apSystemLayer, void * apAppState) |
| { |
| VerifyOrReturn(apAppState != nullptr); |
| ReadHandler * readHandler = static_cast<ReadHandler *>(apAppState); |
| readHandler->ClearStateFlag(ReadHandlerFlags::HoldSync); |
| ChipLogProgress(DataManagement, "Refresh subscribe timer sync after %d seconds", |
| readHandler->mMaxInterval - readHandler->mMinIntervalFloorSeconds); |
| } |
| |
| CHIP_ERROR ReadHandler::RefreshSubscribeSyncTimer() |
| { |
| InteractionModelEngine::GetInstance()->GetExchangeManager()->GetSessionManager()->SystemLayer()->CancelTimer( |
| OnUnblockHoldReportCallback, this); |
| InteractionModelEngine::GetInstance()->GetExchangeManager()->GetSessionManager()->SystemLayer()->CancelTimer( |
| OnRefreshSubscribeTimerSyncCallback, this); |
| |
| if (!IsChunkedReport()) |
| { |
| ChipLogProgress(DataManagement, "Refresh Subscribe Sync Timer with min %d seconds and max %d seconds", |
| mMinIntervalFloorSeconds, mMaxInterval); |
| SetStateFlag(ReadHandlerFlags::HoldReport); |
| SetStateFlag(ReadHandlerFlags::HoldSync); |
| ReturnErrorOnFailure( |
| InteractionModelEngine::GetInstance()->GetExchangeManager()->GetSessionManager()->SystemLayer()->StartTimer( |
| System::Clock::Seconds16(mMinIntervalFloorSeconds), OnUnblockHoldReportCallback, this)); |
| } |
| |
| return CHIP_NO_ERROR; |
| } |
| |
| void ReadHandler::ResetPathIterator() |
| { |
| mAttributePathExpandIterator = AttributePathExpandIterator(mpAttributePathList); |
| mAttributeEncoderState = AttributeValueEncoder::AttributeEncodeState(); |
| } |
| |
| void ReadHandler::SetDirty(const AttributePathParams & aAttributeChanged) |
| { |
| ConcreteAttributePath path; |
| |
| mDirtyGeneration = InteractionModelEngine::GetInstance()->GetReportingEngine().GetDirtySetGeneration(); |
| |
| // We won't reset the path iterator for every SetDirty call to reduce the number of full data reports. |
| // The iterator will be reset after finishing each report session. |
| // |
| // Here we just reset the iterator to the beginning of the current cluster, if the dirty path affects it. |
| // This will ensure the reports are consistent within a single cluster generated from a single path in the request. |
| |
| // TODO (#16699): Currently we can only gurentee the reports generated from a single path in the request are consistent. The |
| // data might be inconsistent if the user send a request with two paths from the same cluster. We need to clearify the behavior |
| // or make it consistent. |
| if (mAttributePathExpandIterator.Get(path) && |
| (aAttributeChanged.HasWildcardEndpointId() || aAttributeChanged.mEndpointId == path.mEndpointId) && |
| (aAttributeChanged.HasWildcardClusterId() || aAttributeChanged.mClusterId == path.mClusterId)) |
| { |
| ChipLogDetail(DataManagement, |
| "The dirty path intersects the cluster we are currently reporting; reset the iterator to the beginning of " |
| "that cluster"); |
| // If we're currently in the middle of generating reports for a given cluster and that in turn is marked dirty, let's reset |
| // our iterator to point back to the beginning of that cluster. This ensures that the receiver will get a coherent view of |
| // the state of the cluster as present on the server |
| mAttributePathExpandIterator.ResetCurrentCluster(); |
| mAttributeEncoderState = AttributeValueEncoder::AttributeEncodeState(); |
| } |
| |
| if (IsReportable()) |
| { |
| InteractionModelEngine::GetInstance()->GetReportingEngine().ScheduleRun(); |
| } |
| } |
| |
| Transport::SecureSession * ReadHandler::GetSession() const |
| { |
| if (!mSessionHandle) |
| { |
| return nullptr; |
| } |
| return mSessionHandle->AsSecureSession(); |
| } |
| |
| void ReadHandler::UnblockUrgentEventDelivery() |
| { |
| SetStateFlag(ReadHandlerFlags::ForceDirty); |
| } |
| |
| void ReadHandler::SetStateFlag(ReadHandlerFlags aFlag, bool aValue) |
| { |
| bool oldReportable = IsReportable(); |
| mFlags.Set(aFlag, aValue); |
| // If we became reportable, schedule a reporting run. |
| if (!oldReportable && IsReportable()) |
| { |
| InteractionModelEngine::GetInstance()->GetReportingEngine().ScheduleRun(); |
| } |
| } |
| |
| void ReadHandler::ClearStateFlag(ReadHandlerFlags aFlag) |
| { |
| SetStateFlag(aFlag, false); |
| } |
| |
| } // namespace app |
| } // namespace chip |
