f4192bda26
This adds support for EATT bearer which was introduced in 5.2, they work as extra channels to have GATT traffic, at the moment it is completely transparent to application when they are in use since the allocation happens automatically. Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>
307 lines
6.3 KiB
C
307 lines
6.3 KiB
C
/* att_internal.h - Attribute protocol handling */
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/*
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* Copyright (c) 2015-2016 Intel Corporation
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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#define BT_EATT_PSM 0x27
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#define BT_ATT_DEFAULT_LE_MTU 23
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#define BT_ATT_TIMEOUT K_SECONDS(30)
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#if BT_L2CAP_RX_MTU < CONFIG_BT_L2CAP_TX_MTU
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#define BT_ATT_MTU BT_L2CAP_RX_MTU
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#else
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#define BT_ATT_MTU CONFIG_BT_L2CAP_TX_MTU
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#endif
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struct bt_att_hdr {
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u8_t code;
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} __packed;
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#define BT_ATT_OP_ERROR_RSP 0x01
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struct bt_att_error_rsp {
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u8_t request;
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u16_t handle;
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u8_t error;
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} __packed;
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#define BT_ATT_OP_MTU_REQ 0x02
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struct bt_att_exchange_mtu_req {
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u16_t mtu;
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} __packed;
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#define BT_ATT_OP_MTU_RSP 0x03
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struct bt_att_exchange_mtu_rsp {
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u16_t mtu;
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} __packed;
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/* Find Information Request */
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#define BT_ATT_OP_FIND_INFO_REQ 0x04
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struct bt_att_find_info_req {
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u16_t start_handle;
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u16_t end_handle;
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} __packed;
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/* Format field values for BT_ATT_OP_FIND_INFO_RSP */
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#define BT_ATT_INFO_16 0x01
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#define BT_ATT_INFO_128 0x02
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struct bt_att_info_16 {
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u16_t handle;
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u16_t uuid;
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} __packed;
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struct bt_att_info_128 {
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u16_t handle;
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u8_t uuid[16];
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} __packed;
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/* Find Information Response */
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#define BT_ATT_OP_FIND_INFO_RSP 0x05
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struct bt_att_find_info_rsp {
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u8_t format;
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u8_t info[0];
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} __packed;
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/* Find By Type Value Request */
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#define BT_ATT_OP_FIND_TYPE_REQ 0x06
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struct bt_att_find_type_req {
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u16_t start_handle;
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u16_t end_handle;
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u16_t type;
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u8_t value[0];
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} __packed;
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struct bt_att_handle_group {
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u16_t start_handle;
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u16_t end_handle;
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} __packed;
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/* Find By Type Value Response */
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#define BT_ATT_OP_FIND_TYPE_RSP 0x07
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struct bt_att_find_type_rsp {
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struct bt_att_handle_group list[0];
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} __packed;
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/* Read By Type Request */
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#define BT_ATT_OP_READ_TYPE_REQ 0x08
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struct bt_att_read_type_req {
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u16_t start_handle;
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u16_t end_handle;
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u8_t uuid[0];
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} __packed;
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struct bt_att_data {
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u16_t handle;
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u8_t value[0];
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} __packed;
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/* Read By Type Response */
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#define BT_ATT_OP_READ_TYPE_RSP 0x09
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struct bt_att_read_type_rsp {
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u8_t len;
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struct bt_att_data data[0];
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} __packed;
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/* Read Request */
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#define BT_ATT_OP_READ_REQ 0x0a
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struct bt_att_read_req {
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u16_t handle;
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} __packed;
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/* Read Response */
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#define BT_ATT_OP_READ_RSP 0x0b
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struct bt_att_read_rsp {
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u8_t value[0];
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} __packed;
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/* Read Blob Request */
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#define BT_ATT_OP_READ_BLOB_REQ 0x0c
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struct bt_att_read_blob_req {
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u16_t handle;
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u16_t offset;
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} __packed;
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/* Read Blob Response */
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#define BT_ATT_OP_READ_BLOB_RSP 0x0d
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struct bt_att_read_blob_rsp {
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u8_t value[0];
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} __packed;
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/* Read Multiple Request */
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#define BT_ATT_READ_MULT_MIN_LEN_REQ 0x04
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#define BT_ATT_OP_READ_MULT_REQ 0x0e
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struct bt_att_read_mult_req {
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u16_t handles[0];
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} __packed;
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/* Read Multiple Respose */
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#define BT_ATT_OP_READ_MULT_RSP 0x0f
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struct bt_att_read_mult_rsp {
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u8_t value[0];
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} __packed;
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/* Read by Group Type Request */
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#define BT_ATT_OP_READ_GROUP_REQ 0x10
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struct bt_att_read_group_req {
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u16_t start_handle;
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u16_t end_handle;
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u8_t uuid[0];
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} __packed;
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struct bt_att_group_data {
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u16_t start_handle;
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u16_t end_handle;
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u8_t value[0];
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} __packed;
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/* Read by Group Type Response */
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#define BT_ATT_OP_READ_GROUP_RSP 0x11
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struct bt_att_read_group_rsp {
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u8_t len;
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struct bt_att_group_data data[0];
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} __packed;
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/* Write Request */
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#define BT_ATT_OP_WRITE_REQ 0x12
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struct bt_att_write_req {
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u16_t handle;
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u8_t value[0];
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} __packed;
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/* Write Response */
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#define BT_ATT_OP_WRITE_RSP 0x13
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/* Prepare Write Request */
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#define BT_ATT_OP_PREPARE_WRITE_REQ 0x16
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struct bt_att_prepare_write_req {
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u16_t handle;
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u16_t offset;
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u8_t value[0];
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} __packed;
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/* Prepare Write Respond */
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#define BT_ATT_OP_PREPARE_WRITE_RSP 0x17
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struct bt_att_prepare_write_rsp {
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u16_t handle;
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u16_t offset;
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u8_t value[0];
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} __packed;
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/* Execute Write Request */
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#define BT_ATT_FLAG_CANCEL 0x00
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#define BT_ATT_FLAG_EXEC 0x01
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#define BT_ATT_OP_EXEC_WRITE_REQ 0x18
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struct bt_att_exec_write_req {
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u8_t flags;
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} __packed;
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/* Execute Write Response */
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#define BT_ATT_OP_EXEC_WRITE_RSP 0x19
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/* Handle Value Notification */
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#define BT_ATT_OP_NOTIFY 0x1b
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struct bt_att_notify {
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u16_t handle;
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u8_t value[0];
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} __packed;
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/* Handle Value Indication */
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#define BT_ATT_OP_INDICATE 0x1d
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struct bt_att_indicate {
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u16_t handle;
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u8_t value[0];
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} __packed;
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/* Handle Value Confirm */
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#define BT_ATT_OP_CONFIRM 0x1e
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struct bt_att_signature {
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u8_t value[12];
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} __packed;
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#define BT_ATT_OP_READ_MULT_VL_REQ 0x20
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struct bt_att_read_mult_vl_req {
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u16_t handles[0];
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} __packed;
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/* Read Multiple Respose */
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#define BT_ATT_OP_READ_MULT_VL_RSP 0x21
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struct bt_att_read_mult_vl_rsp {
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u16_t len;
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u8_t value[0];
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} __packed;
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/* Handle Multiple Value Notification */
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#define BT_ATT_OP_NOTIFY_MULT 0x23
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struct bt_att_notify_mult {
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u16_t handle;
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u16_t len;
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u8_t value[0];
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} __packed;
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/* Write Command */
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#define BT_ATT_OP_WRITE_CMD 0x52
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struct bt_att_write_cmd {
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u16_t handle;
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u8_t value[0];
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} __packed;
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/* Signed Write Command */
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#define BT_ATT_OP_SIGNED_WRITE_CMD 0xd2
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struct bt_att_signed_write_cmd {
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u16_t handle;
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u8_t value[0];
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} __packed;
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typedef void (*bt_att_func_t)(struct bt_conn *conn, u8_t err,
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const void *pdu, u16_t length,
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void *user_data);
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typedef void (*bt_att_destroy_t)(void *user_data);
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/* ATT request context */
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struct bt_att_req {
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sys_snode_t node;
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bt_att_func_t func;
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bt_att_destroy_t destroy;
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struct net_buf_simple_state state;
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struct net_buf *buf;
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#if defined(CONFIG_BT_SMP)
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bool retrying;
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#endif /* CONFIG_BT_SMP */
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void *user_data;
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};
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void att_sent(struct bt_conn *conn, void *user_data);
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void bt_att_init(void);
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u16_t bt_att_get_mtu(struct bt_conn *conn);
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struct net_buf *bt_att_create_pdu(struct bt_conn *conn, u8_t op,
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size_t len);
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/* Allocate a new request */
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struct bt_att_req *bt_att_req_alloc(k_timeout_t timeout);
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/* Free a request */
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void bt_att_req_free(struct bt_att_req *req);
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/* Send ATT PDU over a connection */
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int bt_att_send(struct bt_conn *conn, struct net_buf *buf, bt_conn_tx_cb_t cb,
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void *user_data);
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/* Send ATT Request over a connection */
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int bt_att_req_send(struct bt_conn *conn, struct bt_att_req *req);
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/* Cancel ATT request */
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void bt_att_req_cancel(struct bt_conn *conn, struct bt_att_req *req);
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/* Connect EATT channels */
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int bt_eatt_connect(struct bt_conn *conn, u8_t num_channels);
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/* Disconnect EATT channels */
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int bt_eatt_disconnect(struct bt_conn *conn);
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