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/*
*
* Copyright (c) 2022 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.
*/
#import <Foundation/Foundation.h>
#include <access/SubjectDescriptor.h>
#include <app-common/zap-generated/att-storage.h>
#include <app-common/zap-generated/callback.h>
#include <app-common/zap-generated/cluster-objects.h>
#include <app-common/zap-generated/ids/Attributes.h>
#include <app-common/zap-generated/ids/Clusters.h>
#include <app-common/zap-generated/ids/Commands.h>
#include <app/AttributeAccessInterface.h>
#include <app/CommandHandler.h>
#include <app/ConcreteAttributePath.h>
#include <app/ConcreteCommandPath.h>
#include <app/GlobalAttributes.h>
#include <app/MessageDef/AttributeReportIBs.h>
#include <app/MessageDef/StatusIB.h>
#include <app/WriteHandler.h>
#include <app/data-model/Decode.h>
#include <lib/core/CHIPError.h>
#include <lib/core/CHIPTLV.h>
#include <lib/core/DataModelTypes.h>
#include <lib/core/Optional.h>
#include <protocols/interaction_model/Constants.h>
/**
* This file defines the APIs needed to handle interaction model dispatch.
* These are the APIs normally defined in
* src/app/util/ember-compatibility-functions.cpp and the generated
* IMClusterCommandHandler.cpp but we want a different implementation of these
* to enable more dynamic behavior, since not all framework consumers will be
* implementing the same server clusters.
*/
using namespace chip;
using namespace chip::app;
using namespace chip::app::Clusters;
namespace {
// TODO: Maybe consider making this configurable? See also
// CHIPControllerAccessControl.mm.
constexpr EndpointId kSupportedEndpoint = 0;
} // anonymous namespace
namespace chip {
namespace app {
using Access::SubjectDescriptor;
using Protocols::InteractionModel::Status;
namespace {
bool IsSupportedGlobalAttribute(AttributeId aAttribute)
{
// We don't have any non-global attributes.
using namespace Globals::Attributes;
for (auto & attr : GlobalAttributesNotInMetadata) {
if (attr == aAttribute) {
return true;
}
}
switch (aAttribute) {
case FeatureMap::Id:
FALLTHROUGH;
case ClusterRevision::Id:
return true;
}
return false;
}
Status DetermineAttributeStatus(const ConcreteAttributePath & aPath, bool aIsWrite)
{
// TODO: Consider making this configurable for applications that are not
// trying to be an OTA provider, though in practice it just affects which
// error is returned.
if (aPath.mEndpointId != kSupportedEndpoint) {
return Status::UnsupportedEndpoint;
}
// TODO: Consider making this configurable for applications that are not
// trying to be an OTA provider, though in practice it just affects which
// error is returned.
if (aPath.mClusterId != OtaSoftwareUpdateProvider::Id) {
return Status::UnsupportedCluster;
}
if (!IsSupportedGlobalAttribute(aPath.mAttributeId)) {
return Status::UnsupportedAttribute;
}
// No permissions for this for read, and none of these are writable for
// write. The writable-or-not check happens before the ACL check.
return aIsWrite ? Status::UnsupportedWrite : Status::UnsupportedAccess;
}
} // anonymous namespace
CHIP_ERROR ReadSingleClusterData(const SubjectDescriptor & aSubjectDescriptor, bool aIsFabricFiltered,
const ConcreteReadAttributePath & aPath, AttributeReportIBs::Builder & aAttributeReports,
AttributeValueEncoder::AttributeEncodeState * aEncoderState)
{
Status status = DetermineAttributeStatus(aPath, /* aIsWrite = */ false);
return aAttributeReports.EncodeAttributeStatus(aPath, StatusIB(status));
}
bool ConcreteAttributePathExists(const ConcreteAttributePath & aPath)
{
return DetermineAttributeStatus(aPath, /* aIsWrite = */ false) == Status::UnsupportedAccess;
}
Status ServerClusterCommandExists(const ConcreteCommandPath & aPath)
{
// TODO: Consider making this configurable for applications that are not
// trying to be an OTA provider.
using namespace OtaSoftwareUpdateProvider::Commands;
if (aPath.mEndpointId != kSupportedEndpoint) {
return Status::UnsupportedEndpoint;
}
if (aPath.mClusterId != OtaSoftwareUpdateProvider::Id) {
return Status::UnsupportedCluster;
}
switch (aPath.mCommandId) {
case QueryImage::Id:
FALLTHROUGH;
case ApplyUpdateRequest::Id:
FALLTHROUGH;
case NotifyUpdateApplied::Id:
return Status::Success;
}
return Status::UnsupportedCommand;
}
bool IsClusterDataVersionEqual(const ConcreteClusterPath & aConcreteClusterPath, DataVersion aRequiredVersion)
{
// Will never be called anyway; we have no attributes.
return false;
}
const EmberAfAttributeMetadata * GetAttributeMetadata(const ConcreteAttributePath & aConcreteClusterPath)
{
// Note: This test does not make use of the real attribute metadata.
static EmberAfAttributeMetadata stub = { .defaultValue = EmberAfDefaultOrMinMaxAttributeValue(uint32_t(0)) };
return &stub;
}
bool IsDeviceTypeOnEndpoint(DeviceTypeId deviceType, EndpointId endpoint) { return false; }
CHIP_ERROR WriteSingleClusterData(const SubjectDescriptor & aSubjectDescriptor, const ConcreteDataAttributePath & aPath,
TLV::TLVReader & aReader, WriteHandler * aWriteHandler)
{
Status status = DetermineAttributeStatus(aPath, /* aIsWrite = */ true);
return aWriteHandler->AddStatus(aPath, status);
}
// No attribute access overrides on iOS for now.
// TODO (#16806): This function can be moved to InteractionModelEngine.
AttributeAccessInterface * GetAttributeAccessOverride(EndpointId endpointId, ClusterId clusterId) { return nullptr; }
void DispatchSingleClusterCommand(const ConcreteCommandPath & aPath, TLV::TLVReader & aReader, CommandHandler * aCommandObj)
{
// This command passed ServerClusterCommandExists so we know it's one of our
// supported commands.
using namespace OtaSoftwareUpdateProvider::Commands;
bool wasHandled = false;
CHIP_ERROR err = CHIP_NO_ERROR;
switch (aPath.mCommandId) {
case QueryImage::Id: {
QueryImage::DecodableType commandData;
err = DataModel::Decode(aReader, commandData);
if (err == CHIP_NO_ERROR) {
wasHandled = emberAfOtaSoftwareUpdateProviderClusterQueryImageCallback(aCommandObj, aPath, commandData);
}
break;
}
case ApplyUpdateRequest::Id: {
ApplyUpdateRequest::DecodableType commandData;
err = DataModel::Decode(aReader, commandData);
if (err == CHIP_NO_ERROR) {
wasHandled = emberAfOtaSoftwareUpdateProviderClusterApplyUpdateRequestCallback(aCommandObj, aPath, commandData);
}
break;
}
case NotifyUpdateApplied::Id: {
NotifyUpdateApplied::DecodableType commandData;
err = DataModel::Decode(aReader, commandData);
if (err == CHIP_NO_ERROR) {
wasHandled = emberAfOtaSoftwareUpdateProviderClusterNotifyUpdateAppliedCallback(aCommandObj, aPath, commandData);
}
break;
}
default:
break;
}
if (CHIP_NO_ERROR != err || !wasHandled) {
aCommandObj->AddStatus(aPath, Status::InvalidCommand);
}
}
} // namespace app
} // namespace chip
/**
* Called by the OTA provider cluster server to determine an index
* into its array.
*/
uint16_t emberAfFindClusterServerEndpointIndex(EndpointId endpoint, ClusterId clusterId)
{
if (endpoint == kSupportedEndpoint && clusterId == OtaSoftwareUpdateProvider::Id) {
return 0;
}
return UINT16_MAX;
}
/**
* Methods used by AttributePathExpandIterator, which need to exist
* because it is part of libCHIP. For AttributePathExpandIterator
* purposes, for now, we just pretend like we have just our one
* endpoint, the OTA Provider cluster, and no attributes (because we
* would be erroring out from them anyway).
*/
uint16_t emberAfGetServerAttributeCount(EndpointId endpoint, ClusterId cluster) { return 0; }
uint16_t emberAfEndpointCount(void) { return 1; }
uint16_t emberAfIndexFromEndpoint(EndpointId endpoint)
{
if (endpoint == kSupportedEndpoint) {
return 0;
}
return UINT16_MAX;
}
EndpointId emberAfEndpointFromIndex(uint16_t index)
{
// Index must be valid here, so 0.
return kSupportedEndpoint;
}
Optional<ClusterId> emberAfGetNthClusterId(EndpointId endpoint, uint8_t n, bool server)
{
if (endpoint == kSupportedEndpoint && n == 0 && server) {
return MakeOptional(OtaSoftwareUpdateProvider::Id);
}
return NullOptional;
}
uint16_t emberAfGetServerAttributeIndexByAttributeId(EndpointId endpoint, ClusterId cluster, AttributeId attributeId)
{
return UINT16_MAX;
}
bool emberAfContainsAttribute(chip::EndpointId endpoint, chip::ClusterId clusterId, chip::AttributeId attributeId) { return false; }
uint8_t emberAfClusterCount(EndpointId endpoint, bool server)
{
if (endpoint == kSupportedEndpoint && server) {
return 1;
}
return 0;
}
Optional<AttributeId> emberAfGetServerAttributeIdByIndex(EndpointId endpoint, ClusterId cluster, uint16_t attributeIndex)
{
return NullOptional;
}
uint8_t emberAfClusterIndex(EndpointId endpoint, ClusterId clusterId, EmberAfClusterMask mask)
{
if (endpoint == kSupportedEndpoint && clusterId == OtaSoftwareUpdateProvider::Id && (mask & CLUSTER_MASK_SERVER)) {
return 0;
}
return UINT8_MAX;
}
bool emberAfEndpointIndexIsEnabled(uint16_t index) { return index == 0; }