1 /* 2 * Copyright 2021 The Android Open Source Project 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 17 #pragma once 18 19 #ifdef __cplusplus 20 #include <cstddef> 21 #include <cstdint> 22 #else 23 #include <stddef.h> 24 #include <stdint.h> 25 #endif // _cplusplus 26 27 /* Define the header of each buffer used in the Bluetooth stack. 28 */ 29 typedef struct { 30 uint16_t event; 31 uint16_t len; 32 uint16_t offset; 33 uint16_t layer_specific; 34 uint8_t data[]; 35 } BT_HDR; 36 37 typedef struct { 38 uint16_t event; 39 uint16_t len; 40 uint16_t offset; 41 uint16_t layer_specific; 42 // Note: Removal of flexible array member with no specified size. 43 // This struct may be embedded in any position within other structs 44 // and will not trigger various flexible member compilation issues. 45 } BT_HDR_RIGID; 46 47 #ifdef __cplusplus 48 template <typename T> 49 T* ToPacketData(BT_HDR* bt_hdr, size_t offset = 0) { 50 return reinterpret_cast<T*>(bt_hdr->data + bt_hdr->offset + offset); 51 } 52 template <typename T> 53 const T* ToPacketData(const BT_HDR* bt_hdr, size_t offset = 0) { 54 return reinterpret_cast<const T*>(bt_hdr->data + bt_hdr->offset + offset); 55 } 56 #endif // __cplusplus 57 58 #define BT_HDR_SIZE (sizeof(BT_HDR)) 59