Line data    Source code

       1              : /*
       2              :  *    Copyright (c) 2021 Project CHIP Authors
       3              :  *
       4              :  *    Licensed under the Apache License, Version 2.0 (the "License");
       5              :  *    you may not use this file except in compliance with the License.
       6              :  *    You may obtain a copy of the License at
       7              :  *
       8              :  *        http://www.apache.org/licenses/LICENSE-2.0
       9              :  *
      10              :  *    Unless required by applicable law or agreed to in writing, software
      11              :  *    distributed under the License is distributed on an "AS IS" BASIS,
      12              :  *    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
      13              :  *    See the License for the specific language governing permissions and
      14              :  *    limitations under the License.
      15              :  */
      16              : #include <app/util/persistence/DefaultAttributePersistenceProvider.h>
      17              : 
      18              : #include <app/util/ember-strings.h>
      19              : #include <lib/support/CodeUtils.h>
      20              : #include <lib/support/DefaultStorageKeyAllocator.h>
      21              : #include <lib/support/SafeInt.h>
      22              : 
      23              : namespace chip {
      24              : namespace app {
      25              : 
      26            0 : CHIP_ERROR DefaultAttributePersistenceProvider::InternalReadValue(const StorageKeyName & aKey, EmberAfAttributeType aType,
      27              :                                                                   size_t aExpectedSize, MutableByteSpan & aValue)
      28              : {
      29            0 :     ReturnErrorOnFailure(StorageDelegateWrapper::ReadValue(aKey, aValue));
      30            0 :     size_t size = aValue.size();
      31            0 :     if (emberAfIsStringAttributeType(aType))
      32              :     {
      33              :         // Ensure that we've read enough bytes that we are not ending up with
      34              :         // un-initialized memory.  Should have read length + 1 (for the length
      35              :         // byte).
      36            0 :         VerifyOrReturnError(size >= 1 && size - 1 >= emberAfStringLength(aValue.data()), CHIP_ERROR_INCORRECT_STATE);
      37              :     }
      38            0 :     else if (emberAfIsLongStringAttributeType(aType))
      39              :     {
      40              :         // Ensure that we've read enough bytes that we are not ending up with
      41              :         // un-initialized memory.  Should have read length + 2 (for the length
      42              :         // bytes).
      43            0 :         VerifyOrReturnError(size >= 2 && size - 2 >= emberAfLongStringLength(aValue.data()), CHIP_ERROR_INCORRECT_STATE);
      44              :     }
      45              :     else
      46              :     {
      47              :         // Ensure we got the expected number of bytes for all other types.
      48            0 :         VerifyOrReturnError(size == aExpectedSize, CHIP_ERROR_INVALID_ARGUMENT);
      49              :     }
      50            0 :     return CHIP_NO_ERROR;
      51              : }
      52              : 
      53            0 : CHIP_ERROR DefaultAttributePersistenceProvider::WriteValue(const ConcreteAttributePath & aPath, const ByteSpan & aValue)
      54              : {
      55            0 :     return StorageDelegateWrapper::WriteValue(
      56            0 :         DefaultStorageKeyAllocator::AttributeValue(aPath.mEndpointId, aPath.mClusterId, aPath.mAttributeId), aValue);
      57              : }
      58              : 
      59            0 : CHIP_ERROR DefaultAttributePersistenceProvider::ReadValue(const ConcreteAttributePath & aPath,
      60              :                                                           const EmberAfAttributeMetadata * aMetadata, MutableByteSpan & aValue)
      61              : {
      62            0 :     return InternalReadValue(DefaultStorageKeyAllocator::AttributeValue(aPath.mEndpointId, aPath.mClusterId, aPath.mAttributeId),
      63            0 :                              aMetadata->attributeType, aMetadata->size, aValue);
      64              : }
      65              : 
      66              : } // namespace app
      67              : } // namespace chip