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 <string>
      29              : #include <vector>
      30              : 
      31              : #include <lib/core/CHIPError.h>
      32              : #include <lib/core/TLVData.h>
      33              : #include <lib/core/TLVUtilities.h>
      34              : #include <lib/support/BytesToHex.h>
      35              : #include <lib/support/CodeUtils.h>
      36              : #include <protocols/Protocols.h>
      37              : #include <setup_payload/AdditionalDataPayloadGenerator.h>
      38              : 
      39              : namespace chip {
      40              : 
      41            5 : CHIP_ERROR AdditionalDataPayloadParser::populatePayload(SetupPayloadData::AdditionalDataPayload & outPayload)
      42              : {
      43            5 :     TLV::ContiguousBufferTLVReader reader;
      44            5 :     TLV::ContiguousBufferTLVReader innerReader;
      45              : 
      46            5 :     reader.Init(mPayloadBufferData, mPayloadBufferLength);
      47            5 :     ReturnErrorOnFailure(reader.Next(TLV::kTLVType_Structure, TLV::AnonymousTag()));
      48              : 
      49              :     // Open the container
      50            5 :     ReturnErrorOnFailure(reader.OpenContainer(innerReader));
      51            5 :     if (innerReader.Next(TLV::kTLVType_ByteString, TLV::ContextTag(SetupPayloadData::kRotatingDeviceIdTag)) == CHIP_NO_ERROR)
      52              :     {
      53              :         // Get the value of the rotating device id
      54            3 :         ByteSpan rotatingDeviceId;
      55            3 :         ReturnErrorOnFailure(innerReader.GetByteView(rotatingDeviceId));
      56              : 
      57            3 :         VerifyOrReturnError(rotatingDeviceId.size() <= RotatingDeviceId::kMaxLength, CHIP_ERROR_INVALID_STRING_LENGTH);
      58              :         char rotatingDeviceIdBufferTemp[RotatingDeviceId::kHexMaxLength];
      59              : 
      60            2 :         ReturnErrorOnFailure(Encoding::BytesToUppercaseHexString(rotatingDeviceId.data(), rotatingDeviceId.size(),
      61              :                                                                  rotatingDeviceIdBufferTemp, RotatingDeviceId::kHexMaxLength));
      62            2 :         outPayload.rotatingDeviceId = std::string(rotatingDeviceIdBufferTemp, rotatingDeviceId.size() * 2);
      63              :     }
      64              :     else
      65              :     {
      66            2 :         outPayload.rotatingDeviceId = "";
      67              :     }
      68              : 
      69              :     // Verify the end of the container
      70            4 :     ReturnErrorOnFailure(reader.VerifyEndOfContainer());
      71              : 
      72            3 :     return CHIP_NO_ERROR;
      73              : }
      74              : 
      75              : } // namespace chip