Line data    Source code

       1             : /**
       2             :  *
       3             :  *    Copyright (c) 2020 Project CHIP Authors
       4             :  *
       5             :  *    Licensed under the Apache License, Version 2.0 (the "License");
       6             :  *    you may not use this file except in compliance with the License.
       7             :  *    You may obtain a copy of the License at
       8             :  *
       9             :  *        http://www.apache.org/licenses/LICENSE-2.0
      10             :  *
      11             :  *    Unless required by applicable law or agreed to in writing, software
      12             :  *    distributed under the License is distributed on an "AS IS" BASIS,
      13             :  *    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
      14             :  *    See the License for the specific language governing permissions and
      15             :  *    limitations under the License.
      16             :  */
      17             : 
      18             : /**
      19             :  *    @file
      20             :  *      This file describes a AdditionalData Payload parser based on the
      21             :  *      CHIP specification.
      22             :  */
      23             : 
      24             : #include "AdditionalDataPayloadParser.h"
      25             : 
      26             : #include <cstdlib>
      27             : #include <string.h>
      28             : #include <vector>
      29             : 
      30             : #include <lib/core/CHIPError.h>
      31             : #include <lib/core/TLVData.h>
      32             : #include <lib/core/TLVUtilities.h>
      33             : #include <lib/support/BytesToHex.h>
      34             : #include <lib/support/CodeUtils.h>
      35             : #include <protocols/Protocols.h>
      36             : #include <setup_payload/AdditionalDataPayloadGenerator.h>
      37             : 
      38             : namespace chip {
      39             : 
      40           5 : CHIP_ERROR AdditionalDataPayloadParser::populatePayload(SetupPayloadData::AdditionalDataPayload & outPayload)
      41             : {
      42           5 :     TLV::ContiguousBufferTLVReader reader;
      43           5 :     TLV::ContiguousBufferTLVReader innerReader;
      44             : 
      45           5 :     reader.Init(mPayloadBufferData, mPayloadBufferLength);
      46           5 :     ReturnErrorOnFailure(reader.Next(TLV::kTLVType_Structure, TLV::AnonymousTag()));
      47             : 
      48             :     // Open the container
      49           5 :     ReturnErrorOnFailure(reader.OpenContainer(innerReader));
      50           5 :     if (innerReader.Next(TLV::kTLVType_ByteString, TLV::ContextTag(SetupPayloadData::kRotatingDeviceIdTag)) == CHIP_NO_ERROR)
      51             :     {
      52             :         // Get the value of the rotating device id
      53           3 :         ByteSpan rotatingDeviceId;
      54           3 :         ReturnErrorOnFailure(innerReader.GetByteView(rotatingDeviceId));
      55             : 
      56           3 :         VerifyOrReturnError(rotatingDeviceId.size() <= RotatingDeviceId::kMaxLength, CHIP_ERROR_INVALID_STRING_LENGTH);
      57             :         char rotatingDeviceIdBufferTemp[RotatingDeviceId::kHexMaxLength];
      58             : 
      59           2 :         ReturnErrorOnFailure(Encoding::BytesToUppercaseHexString(rotatingDeviceId.data(), rotatingDeviceId.size(),
      60             :                                                                  rotatingDeviceIdBufferTemp, RotatingDeviceId::kHexMaxLength));
      61           2 :         outPayload.rotatingDeviceId = std::string(rotatingDeviceIdBufferTemp, rotatingDeviceId.size() * 2);
      62             :     }
      63             :     else
      64             :     {
      65           2 :         outPayload.rotatingDeviceId = "";
      66             :     }
      67             : 
      68             :     // Verify the end of the container
      69           4 :     ReturnErrorOnFailure(reader.VerifyEndOfContainer());
      70             : 
      71           3 :     return CHIP_NO_ERROR;
      72             : }
      73             : 
      74             : } // namespace chip