| /* |
| * |
| * 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 objects for a CHIP IM Invoke Command Sender |
| * |
| */ |
| |
| #include "CommandSender.h" |
| #include "InteractionModelEngine.h" |
| #include "StatusResponse.h" |
| #include <app/TimedRequest.h> |
| #include <protocols/Protocols.h> |
| #include <protocols/interaction_model/Constants.h> |
| |
| namespace chip { |
| namespace app { |
| |
| CommandSender::CommandSender(Callback * apCallback, Messaging::ExchangeManager * apExchangeMgr, bool aIsTimedRequest) : |
| mExchangeCtx(*this), mpCallback(apCallback), mpExchangeMgr(apExchangeMgr), mSuppressResponse(false), |
| mTimedRequest(aIsTimedRequest) |
| {} |
| |
| CHIP_ERROR CommandSender::AllocateBuffer() |
| { |
| if (!mBufferAllocated) |
| { |
| mCommandMessageWriter.Reset(); |
| |
| System::PacketBufferHandle commandPacket = System::PacketBufferHandle::New(chip::app::kMaxSecureSduLengthBytes); |
| VerifyOrReturnError(!commandPacket.IsNull(), CHIP_ERROR_NO_MEMORY); |
| |
| mCommandMessageWriter.Init(std::move(commandPacket)); |
| ReturnErrorOnFailure(mInvokeRequestBuilder.Init(&mCommandMessageWriter)); |
| |
| mInvokeRequestBuilder.SuppressResponse(mSuppressResponse).TimedRequest(mTimedRequest); |
| ReturnErrorOnFailure(mInvokeRequestBuilder.GetError()); |
| |
| mInvokeRequestBuilder.CreateInvokeRequests(); |
| ReturnErrorOnFailure(mInvokeRequestBuilder.GetError()); |
| |
| mBufferAllocated = true; |
| } |
| |
| return CHIP_NO_ERROR; |
| } |
| |
| CHIP_ERROR CommandSender::SendCommandRequest(const SessionHandle & session, Optional<System::Clock::Timeout> timeout) |
| { |
| VerifyOrReturnError(mState == State::AddedCommand, CHIP_ERROR_INCORRECT_STATE); |
| |
| ReturnErrorOnFailure(Finalize(mPendingInvokeData)); |
| |
| // Create a new exchange context. |
| auto exchange = mpExchangeMgr->NewContext(session, this); |
| VerifyOrReturnError(exchange != nullptr, CHIP_ERROR_NO_MEMORY); |
| |
| mExchangeCtx.Grab(exchange); |
| VerifyOrReturnError(!mExchangeCtx->IsGroupExchangeContext(), CHIP_ERROR_INVALID_MESSAGE_TYPE); |
| |
| mExchangeCtx->SetResponseTimeout(timeout.ValueOr(session->ComputeRoundTripTimeout(app::kExpectedIMProcessingTime))); |
| |
| if (mTimedRequest != mTimedInvokeTimeoutMs.HasValue()) |
| { |
| ChipLogError( |
| DataManagement, |
| "Inconsistent timed request state in CommandSender: mTimedRequest (%d) != mTimedInvokeTimeoutMs.HasValue() (%d)", |
| mTimedRequest, mTimedInvokeTimeoutMs.HasValue()); |
| return CHIP_ERROR_INCORRECT_STATE; |
| } |
| |
| if (mTimedInvokeTimeoutMs.HasValue()) |
| { |
| ReturnErrorOnFailure(TimedRequest::Send(mExchangeCtx.Get(), mTimedInvokeTimeoutMs.Value())); |
| MoveToState(State::AwaitingTimedStatus); |
| return CHIP_NO_ERROR; |
| } |
| |
| return SendInvokeRequest(); |
| } |
| |
| CHIP_ERROR CommandSender::SendGroupCommandRequest(const SessionHandle & session) |
| { |
| VerifyOrReturnError(mState == State::AddedCommand, CHIP_ERROR_INCORRECT_STATE); |
| |
| ReturnErrorOnFailure(Finalize(mPendingInvokeData)); |
| |
| // Create a new exchange context. |
| auto exchange = mpExchangeMgr->NewContext(session, this); |
| VerifyOrReturnError(exchange != nullptr, CHIP_ERROR_NO_MEMORY); |
| |
| mExchangeCtx.Grab(exchange); |
| VerifyOrReturnError(mExchangeCtx->IsGroupExchangeContext(), CHIP_ERROR_INVALID_MESSAGE_TYPE); |
| |
| ReturnErrorOnFailure(SendInvokeRequest()); |
| |
| Close(); |
| return CHIP_NO_ERROR; |
| } |
| |
| CHIP_ERROR CommandSender::SendInvokeRequest() |
| { |
| using namespace Protocols::InteractionModel; |
| using namespace Messaging; |
| |
| ReturnErrorOnFailure( |
| mExchangeCtx->SendMessage(MsgType::InvokeCommandRequest, std::move(mPendingInvokeData), SendMessageFlags::kExpectResponse)); |
| MoveToState(State::CommandSent); |
| |
| return CHIP_NO_ERROR; |
| } |
| |
| CHIP_ERROR CommandSender::OnMessageReceived(Messaging::ExchangeContext * apExchangeContext, const PayloadHeader & aPayloadHeader, |
| System::PacketBufferHandle && aPayload) |
| { |
| using namespace Protocols::InteractionModel; |
| |
| if (mState == State::CommandSent) |
| { |
| MoveToState(State::ResponseReceived); |
| } |
| |
| CHIP_ERROR err = CHIP_NO_ERROR; |
| bool sendStatusResponse = false; |
| VerifyOrExit(apExchangeContext == mExchangeCtx.Get(), err = CHIP_ERROR_INCORRECT_STATE); |
| sendStatusResponse = true; |
| |
| if (mState == State::AwaitingTimedStatus) |
| { |
| if (aPayloadHeader.HasMessageType(Protocols::InteractionModel::MsgType::StatusResponse)) |
| { |
| CHIP_ERROR statusError = CHIP_NO_ERROR; |
| SuccessOrExit(err = StatusResponse::ProcessStatusResponse(std::move(aPayload), statusError)); |
| sendStatusResponse = false; |
| SuccessOrExit(err = statusError); |
| err = SendInvokeRequest(); |
| } |
| else |
| { |
| err = CHIP_ERROR_INVALID_MESSAGE_TYPE; |
| } |
| // Skip all other processing here (which is for the response to the |
| // invoke request), no matter whether err is success or not. |
| goto exit; |
| } |
| |
| if (aPayloadHeader.HasMessageType(MsgType::InvokeCommandResponse)) |
| { |
| err = ProcessInvokeResponse(std::move(aPayload)); |
| SuccessOrExit(err); |
| sendStatusResponse = false; |
| } |
| else if (aPayloadHeader.HasMessageType(MsgType::StatusResponse)) |
| { |
| CHIP_ERROR statusError = CHIP_NO_ERROR; |
| SuccessOrExit(err = StatusResponse::ProcessStatusResponse(std::move(aPayload), statusError)); |
| SuccessOrExit(err = statusError); |
| err = CHIP_ERROR_INVALID_MESSAGE_TYPE; |
| } |
| else |
| { |
| err = CHIP_ERROR_INVALID_MESSAGE_TYPE; |
| } |
| |
| exit: |
| if (mpCallback != nullptr) |
| { |
| if (err != CHIP_NO_ERROR) |
| { |
| mpCallback->OnError(this, err); |
| } |
| } |
| |
| if (sendStatusResponse) |
| { |
| StatusResponse::Send(Status::InvalidAction, apExchangeContext, false /*aExpectResponse*/); |
| } |
| |
| if (mState != State::CommandSent) |
| { |
| Close(); |
| } |
| // Else we got a response to a Timed Request and just sent the invoke. |
| |
| return err; |
| } |
| |
| CHIP_ERROR CommandSender::ProcessInvokeResponse(System::PacketBufferHandle && payload) |
| { |
| CHIP_ERROR err = CHIP_NO_ERROR; |
| System::PacketBufferTLVReader reader; |
| TLV::TLVReader invokeResponsesReader; |
| InvokeResponseMessage::Parser invokeResponseMessage; |
| InvokeResponseIBs::Parser invokeResponses; |
| bool suppressResponse = false; |
| |
| reader.Init(std::move(payload)); |
| ReturnErrorOnFailure(invokeResponseMessage.Init(reader)); |
| |
| #if CHIP_CONFIG_IM_ENABLE_SCHEMA_CHECK |
| ReturnErrorOnFailure(invokeResponseMessage.CheckSchemaValidity()); |
| #endif |
| |
| ReturnErrorOnFailure(invokeResponseMessage.GetSuppressResponse(&suppressResponse)); |
| ReturnErrorOnFailure(invokeResponseMessage.GetInvokeResponses(&invokeResponses)); |
| invokeResponses.GetReader(&invokeResponsesReader); |
| |
| while (CHIP_NO_ERROR == (err = invokeResponsesReader.Next())) |
| { |
| VerifyOrReturnError(TLV::AnonymousTag() == invokeResponsesReader.GetTag(), CHIP_ERROR_INVALID_TLV_TAG); |
| InvokeResponseIB::Parser invokeResponse; |
| ReturnErrorOnFailure(invokeResponse.Init(invokeResponsesReader)); |
| ReturnErrorOnFailure(ProcessInvokeResponseIB(invokeResponse)); |
| } |
| |
| // if we have exhausted this container |
| if (CHIP_END_OF_TLV == err) |
| { |
| err = CHIP_NO_ERROR; |
| } |
| ReturnErrorOnFailure(err); |
| return invokeResponseMessage.ExitContainer(); |
| } |
| |
| void CommandSender::OnResponseTimeout(Messaging::ExchangeContext * apExchangeContext) |
| { |
| ChipLogProgress(DataManagement, "Time out! failed to receive invoke command response from Exchange: " ChipLogFormatExchange, |
| ChipLogValueExchange(apExchangeContext)); |
| |
| if (mpCallback != nullptr) |
| { |
| mpCallback->OnError(this, CHIP_ERROR_TIMEOUT); |
| } |
| |
| Close(); |
| } |
| |
| void CommandSender::Close() |
| { |
| mSuppressResponse = false; |
| mTimedRequest = false; |
| MoveToState(State::AwaitingDestruction); |
| |
| if (mpCallback) |
| { |
| mpCallback->OnDone(this); |
| } |
| } |
| |
| CHIP_ERROR CommandSender::ProcessInvokeResponseIB(InvokeResponseIB::Parser & aInvokeResponse) |
| { |
| CHIP_ERROR err = CHIP_NO_ERROR; |
| ClusterId clusterId; |
| CommandId commandId; |
| EndpointId endpointId; |
| // Default to success when an invoke response is received. |
| StatusIB statusIB; |
| |
| { |
| bool hasDataResponse = false; |
| TLV::TLVReader commandDataReader; |
| |
| CommandStatusIB::Parser commandStatus; |
| err = aInvokeResponse.GetStatus(&commandStatus); |
| if (CHIP_NO_ERROR == err) |
| { |
| CommandPathIB::Parser commandPath; |
| ReturnErrorOnFailure(commandStatus.GetPath(&commandPath)); |
| ReturnErrorOnFailure(commandPath.GetClusterId(&clusterId)); |
| ReturnErrorOnFailure(commandPath.GetCommandId(&commandId)); |
| ReturnErrorOnFailure(commandPath.GetEndpointId(&endpointId)); |
| |
| StatusIB::Parser status; |
| commandStatus.GetErrorStatus(&status); |
| ReturnErrorOnFailure(status.DecodeStatusIB(statusIB)); |
| } |
| else if (CHIP_END_OF_TLV == err) |
| { |
| CommandDataIB::Parser commandData; |
| CommandPathIB::Parser commandPath; |
| ReturnErrorOnFailure(aInvokeResponse.GetCommand(&commandData)); |
| ReturnErrorOnFailure(commandData.GetPath(&commandPath)); |
| ReturnErrorOnFailure(commandPath.GetEndpointId(&endpointId)); |
| ReturnErrorOnFailure(commandPath.GetClusterId(&clusterId)); |
| ReturnErrorOnFailure(commandPath.GetCommandId(&commandId)); |
| commandData.GetFields(&commandDataReader); |
| err = CHIP_NO_ERROR; |
| hasDataResponse = true; |
| } |
| |
| if (err != CHIP_NO_ERROR) |
| { |
| ChipLogError(DataManagement, "Received malformed Command Response, err=%" CHIP_ERROR_FORMAT, err.Format()); |
| } |
| else |
| { |
| if (hasDataResponse) |
| { |
| ChipLogProgress(DataManagement, |
| "Received Command Response Data, Endpoint=%u Cluster=" ChipLogFormatMEI |
| " Command=" ChipLogFormatMEI, |
| endpointId, ChipLogValueMEI(clusterId), ChipLogValueMEI(commandId)); |
| } |
| else |
| { |
| ChipLogProgress(DataManagement, |
| "Received Command Response Status for Endpoint=%u Cluster=" ChipLogFormatMEI |
| " Command=" ChipLogFormatMEI " Status=0x%x", |
| endpointId, ChipLogValueMEI(clusterId), ChipLogValueMEI(commandId), |
| to_underlying(statusIB.mStatus)); |
| } |
| } |
| ReturnErrorOnFailure(err); |
| |
| if (mpCallback != nullptr) |
| { |
| if (statusIB.IsSuccess()) |
| { |
| mpCallback->OnResponse(this, ConcreteCommandPath(endpointId, clusterId, commandId), statusIB, |
| hasDataResponse ? &commandDataReader : nullptr); |
| } |
| else |
| { |
| mpCallback->OnError(this, statusIB.ToChipError()); |
| } |
| } |
| } |
| return CHIP_NO_ERROR; |
| } |
| |
| CHIP_ERROR CommandSender::PrepareCommand(const CommandPathParams & aCommandPathParams, bool aStartDataStruct) |
| { |
| ReturnErrorOnFailure(AllocateBuffer()); |
| |
| // |
| // We must not be in the middle of preparing a command, or having prepared or sent one. |
| // |
| VerifyOrReturnError(mState == State::Idle, CHIP_ERROR_INCORRECT_STATE); |
| InvokeRequests::Builder & invokeRequests = mInvokeRequestBuilder.GetInvokeRequests(); |
| CommandDataIB::Builder & invokeRequest = invokeRequests.CreateCommandData(); |
| ReturnErrorOnFailure(invokeRequests.GetError()); |
| CommandPathIB::Builder & path = invokeRequest.CreatePath(); |
| ReturnErrorOnFailure(invokeRequest.GetError()); |
| ReturnErrorOnFailure(path.Encode(aCommandPathParams)); |
| |
| if (aStartDataStruct) |
| { |
| ReturnErrorOnFailure(invokeRequest.GetWriter()->StartContainer(TLV::ContextTag(to_underlying(CommandDataIB::Tag::kFields)), |
| TLV::kTLVType_Structure, mDataElementContainerType)); |
| } |
| |
| MoveToState(State::AddingCommand); |
| return CHIP_NO_ERROR; |
| } |
| |
| CHIP_ERROR CommandSender::FinishCommand(bool aEndDataStruct) |
| { |
| CHIP_ERROR err = CHIP_NO_ERROR; |
| |
| VerifyOrReturnError(mState == State::AddingCommand, err = CHIP_ERROR_INCORRECT_STATE); |
| |
| CommandDataIB::Builder & commandData = mInvokeRequestBuilder.GetInvokeRequests().GetCommandData(); |
| |
| if (aEndDataStruct) |
| { |
| ReturnErrorOnFailure(commandData.GetWriter()->EndContainer(mDataElementContainerType)); |
| } |
| |
| ReturnErrorOnFailure(commandData.EndOfCommandDataIB().GetError()); |
| ReturnErrorOnFailure(mInvokeRequestBuilder.GetInvokeRequests().EndOfInvokeRequests().GetError()); |
| ReturnErrorOnFailure(mInvokeRequestBuilder.EndOfInvokeRequestMessage().GetError()); |
| |
| MoveToState(State::AddedCommand); |
| |
| return CHIP_NO_ERROR; |
| } |
| |
| TLV::TLVWriter * CommandSender::GetCommandDataIBTLVWriter() |
| { |
| if (mState != State::AddingCommand) |
| { |
| return nullptr; |
| } |
| |
| return mInvokeRequestBuilder.GetInvokeRequests().GetCommandData().GetWriter(); |
| } |
| |
| CHIP_ERROR CommandSender::FinishCommand(const Optional<uint16_t> & aTimedInvokeTimeoutMs) |
| { |
| ReturnErrorOnFailure(FinishCommand(/* aEndDataStruct = */ false)); |
| if (!mTimedInvokeTimeoutMs.HasValue()) |
| { |
| mTimedInvokeTimeoutMs = aTimedInvokeTimeoutMs; |
| } |
| else if (aTimedInvokeTimeoutMs.HasValue()) |
| { |
| uint16_t newValue = std::min(mTimedInvokeTimeoutMs.Value(), aTimedInvokeTimeoutMs.Value()); |
| mTimedInvokeTimeoutMs.SetValue(newValue); |
| } |
| return CHIP_NO_ERROR; |
| } |
| |
| CHIP_ERROR CommandSender::Finalize(System::PacketBufferHandle & commandPacket) |
| { |
| VerifyOrReturnError(mState == State::AddedCommand, CHIP_ERROR_INCORRECT_STATE); |
| return mCommandMessageWriter.Finalize(&commandPacket); |
| } |
| |
| const char * CommandSender::GetStateStr() const |
| { |
| #if CHIP_DETAIL_LOGGING |
| switch (mState) |
| { |
| case State::Idle: |
| return "Idle"; |
| |
| case State::AddingCommand: |
| return "AddingCommand"; |
| |
| case State::AddedCommand: |
| return "AddedCommand"; |
| |
| case State::AwaitingTimedStatus: |
| return "AwaitingTimedStatus"; |
| |
| case State::CommandSent: |
| return "CommandSent"; |
| |
| case State::ResponseReceived: |
| return "ResponseReceived"; |
| |
| case State::AwaitingDestruction: |
| return "AwaitingDestruction"; |
| } |
| #endif // CHIP_DETAIL_LOGGING |
| return "N/A"; |
| } |
| |
| void CommandSender::MoveToState(const State aTargetState) |
| { |
| mState = aTargetState; |
| ChipLogDetail(DataManagement, "ICR moving to [%10.10s]", GetStateStr()); |
| } |
| |
| } // namespace app |
| } // namespace chip |
