| /** @file |
| * @brief Bluetooth data buffer API |
| */ |
| |
| /* |
| * Copyright (c) 2016 Intel Corporation |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| #ifndef __BT_BUF_H |
| #define __BT_BUF_H |
| |
| /** |
| * @brief Data buffers |
| * @defgroup bt_buf Data buffers |
| * @ingroup bluetooth |
| * @{ |
| */ |
| |
| #include <stdint.h> |
| #include <net/buf.h> |
| #include <bluetooth/hci.h> |
| |
| /** Possible types of buffers passed around the Bluetooth stack */ |
| enum bt_buf_type { |
| BT_BUF_CMD, /** HCI command */ |
| BT_BUF_EVT, /** HCI event */ |
| BT_BUF_ACL_OUT, /** Outgoing ACL data */ |
| BT_BUF_ACL_IN, /** Incoming ACL data */ |
| }; |
| |
| /** Minimum amount of user data size for buffers passed to the stack. */ |
| #define BT_BUF_USER_DATA_MIN 4 |
| |
| /** Data size neeed for HCI event buffers */ |
| #define BT_BUF_EVT_SIZE (CONFIG_BLUETOOTH_HCI_RECV_RESERVE + \ |
| sizeof(struct bt_hci_evt_hdr) + \ |
| CONFIG_BLUETOOTH_MAX_EVT_LEN) |
| |
| /** Data size needed for incoming ACL buffers */ |
| #define BT_BUF_ACL_IN_SIZE (CONFIG_BLUETOOTH_HCI_RECV_RESERVE + \ |
| sizeof(struct bt_hci_acl_hdr) + \ |
| 4 /* L2CAP header size */ + \ |
| CONFIG_BLUETOOTH_L2CAP_IN_MTU) |
| |
| /** Set the buffer type |
| * |
| * @param buf Bluetooth buffer |
| * @param type The BT_* type to set the buffer to |
| */ |
| static inline void bt_buf_set_type(struct net_buf *buf, enum bt_buf_type type) |
| { |
| *(uint8_t *)net_buf_user_data(buf) = type; |
| } |
| |
| /** Get the buffer type |
| * |
| * @param buf Bluetooth buffer |
| * |
| * @return The BT_* type to of the buffer |
| */ |
| static inline enum bt_buf_type bt_buf_get_type(struct net_buf *buf) |
| { |
| return *(uint8_t *)net_buf_user_data(buf); |
| } |
| |
| /** |
| * @} |
| */ |
| |
| #endif /* __BT_BUF_H */ |