279 lines
6.9 KiB
C
279 lines
6.9 KiB
C
/* att.h - Attribute protocol handling */
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/*
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* Copyright (c) 2015 Intel Corporation
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* 1) Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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*
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* 2) Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* 3) Neither the name of Intel Corporation nor the names of its contributors
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* may be used to endorse or promote products derived from this software without
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* specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#define BT_ATT_DEFAULT_LE_MTU 23
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#define BT_ATT_MAX_LE_MTU 517
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struct bt_att_hdr {
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uint8_t code;
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} __packed;
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/* Error codes for Error response PDU */
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#define BT_ATT_ERR_INVALID_HANDLE 0x01
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#define BT_ATT_ERR_READ_NOT_PERMITTED 0x02
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#define BT_ATT_ERR_WRITE_NOT_PERMITTED 0x03
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#define BT_ATT_ERR_INVALID_PDU 0x04
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#define BT_ATT_ERR_AUTHENTICATION 0x05
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#define BT_ATT_ERR_NOT_SUPPORTED 0x06
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#define BT_ATT_ERR_INVALID_OFFSET 0x07
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#define BT_ATT_ERR_AUTHORIZATION 0x08
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#define BT_ATT_ERR_PREPARE_QUEUE_FULL 0x09
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#define BT_ATT_ERR_ATTRIBUTE_NOT_FOUND 0x0a
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#define BT_ATT_ERR_ATTRIBUTE_NOT_LONG 0x0b
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#define BT_ATT_ERR_ENCRYPTION_KEY_SIZE 0x0c
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#define BT_ATT_ERR_INVALID_ATTRIBUTE_LEN 0x0d
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#define BT_ATT_ERR_UNLIKELY 0x0e
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#define BT_ATT_ERR_INSUFFICIENT_ENCRYPTION 0x0f
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#define BT_ATT_ERR_UNSUPPORTED_GROUP_TYPE 0x10
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#define BT_ATT_ERR_INSUFFICIENT_RESOURCES 0x11
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#define BT_ATT_OP_ERROR_RSP 0x01
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struct bt_att_error_rsp {
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uint8_t request;
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uint16_t handle;
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uint8_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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uint16_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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uint16_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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uint16_t start_handle;
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uint16_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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uint16_t handle;
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uint16_t uuid;
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} __packed;
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struct bt_att_info_128 {
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uint16_t handle;
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uint8_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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uint8_t format;
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uint8_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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uint16_t start_handle;
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uint16_t end_handle;
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uint16_t type;
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uint8_t value[0];
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} __packed;
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struct bt_att_handle_group {
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uint16_t start_handle;
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uint16_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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uint16_t start_handle;
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uint16_t end_handle;
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uint8_t uuid[0];
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} __packed;
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struct bt_att_data {
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uint16_t handle;
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uint8_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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uint8_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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uint16_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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uint8_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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uint16_t handle;
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uint16_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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uint8_t value[0];
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} __packed;
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/* Read Multiple Request */
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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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uint16_t handle1;
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uint16_t handle2;
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uint16_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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uint8_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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uint16_t start_handle;
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uint16_t end_handle;
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uint8_t uuid[0];
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} __packed;
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struct bt_att_group_data {
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uint16_t start_handle;
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uint16_t end_handle;
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uint8_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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uint8_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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uint16_t handle;
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uint8_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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uint16_t handle;
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uint16_t offset;
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uint8_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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uint16_t handle;
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uint16_t offset;
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uint8_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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uint8_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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uint16_t handle;
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uint8_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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uint16_t handle;
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uint8_t value[0];
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} __packed;
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/* Handle Value Confirm */
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#define BT_ATT_OP_CONFIRM 0x1f
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struct bt_att_signature {
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uint8_t value[12];
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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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uint16_t handle;
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uint8_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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uint16_t handle;
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uint8_t value[0];
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} __packed;
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void bt_att_init();
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struct bt_buf *bt_att_create_pdu(struct bt_conn *conn, uint8_t op, size_t len);
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