Line data    Source code

       1             : /*
       2             :  *
       3             :  *    Copyright (c) 2020 Project CHIP Authors
       4             :  *    Copyright (c) 2014-2017 Nest Labs, Inc.
       5             :  *
       6             :  *    Licensed under the Apache License, Version 2.0 (the "License");
       7             :  *    you may not use this file except in compliance with the License.
       8             :  *    You may obtain a copy of the License at
       9             :  *
      10             :  *        http://www.apache.org/licenses/LICENSE-2.0
      11             :  *
      12             :  *    Unless required by applicable law or agreed to in writing, software
      13             :  *    distributed under the License is distributed on an "AS IS" BASIS,
      14             :  *    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
      15             :  *    See the License for the specific language governing permissions and
      16             :  *    limitations under the License.
      17             :  */
      18             : #include <ble/BleConfig.h>
      19             : 
      20             : #if CONFIG_NETWORK_LAYER_BLE
      21             : 
      22             : #include <cctype>
      23             : #include <cstdint>
      24             : #include <cstring>
      25             : 
      26             : #include "BleUUID.h"
      27             : 
      28             : namespace chip {
      29             : namespace Ble {
      30             : 
      31             : const ChipBleUUID CHIP_BLE_SVC_ID = { { // 0000FFF6-0000-1000-8000-00805F9B34FB
      32             :                                         0x00, 0x00, 0xFF, 0xF6, 0x00, 0x00, 0x10, 0x00, 0x80, 0x00, 0x00, 0x80, 0x5F, 0x9B, 0x34,
      33             :                                         0xFB } };
      34             : 
      35         163 : inline static uint8_t HexDigitToInt(const char c)
      36             : {
      37         163 :     return static_cast<uint8_t>(c >= '0' && c <= '9' ? c - '0' : tolower(c) - 'a' + 10);
      38             : }
      39             : 
      40           3 : bool UUIDsMatch(const ChipBleUUID * idOne, const ChipBleUUID * idTwo)
      41             : {
      42           3 :     if ((idOne == nullptr) || (idTwo == nullptr))
      43             :     {
      44           0 :         return false;
      45             :     }
      46           3 :     return (memcmp(idOne->bytes, idTwo->bytes, 16) == 0);
      47             : }
      48             : 
      49             : // Convert a string like "0000FFF6-0000-1000-8000-00805F9B34FB" to binary UUID
      50           6 : bool StringToUUID(const char * str, ChipBleUUID & uuid)
      51             : {
      52           6 :     constexpr size_t NUM_UUID_NIBBLES = sizeof(uuid.bytes) * 2;
      53           6 :     size_t nibbleId                   = 0;
      54             : 
      55         177 :     for (; *str; ++str)
      56             :     {
      57         173 :         if (*str == '-') // skip separators
      58           8 :             continue;
      59             : 
      60         165 :         if (!isxdigit(*str)) // invalid character!
      61           1 :             return false;
      62             : 
      63         164 :         if (nibbleId >= NUM_UUID_NIBBLES) // too long string!
      64           1 :             return false;
      65             : 
      66         163 :         uint8_t & byte = uuid.bytes[nibbleId / 2];
      67         163 :         if (nibbleId % 2 == 0)
      68          82 :             byte = static_cast<uint8_t>(HexDigitToInt(*str) << 4);
      69             :         else
      70          81 :             byte = static_cast<uint8_t>(byte | HexDigitToInt(*str));
      71             : 
      72         163 :         ++nibbleId;
      73             :     }
      74             : 
      75             :     // All bytes were initialized?
      76           4 :     return nibbleId == NUM_UUID_NIBBLES;
      77             : }
      78             : 
      79             : } /* namespace Ble */
      80             : } /* namespace chip */
      81             : 
      82             : #endif /* CONFIG_NETWORK_LAYER_BLE */