Bluetooth: Add GATT skeleton
This adds initial API and definitions to create a database. Change-Id: I69d5b3f5fd2f04cc309c2f76a84581673aa54e7b Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>
This commit is contained in:
Luiz Augusto von Dentz
Anas Nashif
parent
6d564a9648
commit
de52b09a3f
4 changed files with 435 additions and 0 deletions
272
include/bluetooth/gatt.h
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272
include/bluetooth/gatt.h
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@ -0,0 +1,272 @@
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/* gatt.h - Generic Attribute Profile 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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#ifndef __BT_GATT_H
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#define __BT_GATT_H
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/* GATT Attribute structure */
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struct bt_gatt_attr {
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uint16_t handle;
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const struct bt_uuid *uuid;
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int (*read)(const struct bt_gatt_attr *attr,
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void *buf, uint8_t len,
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uint16_t offset);
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int (*write)(const struct bt_gatt_attr *attr,
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const void *buf, uint8_t len,
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uint16_t offset);
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void *user_data;
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};
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/* Service Attribute Value */
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struct bt_gatt_service {
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const struct bt_uuid *uuid;
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};
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/* Include Attribute Value */
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struct bt_gatt_include {
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uint16_t start_handle;
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uint16_t end_handle;
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const struct bt_uuid *uuid;
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};
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/* Characteristic Properties Bitfield values */
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#define BT_GATT_CHRC_BROADCAST 0x01
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#define BT_GATT_CHRC_READ 0x02
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#define BT_GATT_CHRC_WRITE_WITHOUT_RESP 0x04
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#define BT_GATT_CHRC_WRITE 0x08
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#define BT_GATT_CHRC_NOTIFY 0x10
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#define BT_GATT_CHRC_INDICATE 0x20
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#define BT_GATT_CHRC_AUTH 0x40
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#define BT_GATT_CHRC_EXT_PROP 0x80
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/* Characteristic Attribute Value */
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struct bt_gatt_chrc {
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uint8_t properties;
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uint16_t value_handle;
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const struct bt_uuid *uuid;
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};
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/* Characteristic Extended Properties Bitfield values */
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#define BT_GATT_CEP_RELIABLE_WRITE 0x01
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#define BT_GATT_CEP_WRITABLE_AUX 0x02
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/* Characteristic Extended Properties Attribute Value */
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struct bt_gatt_cep {
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uint8_t properties;
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};
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/* Characteristic User Description Attribute Value */
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struct bt_gatt_cud {
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char *string;
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};
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/* Client Characteristic Configuration.user_datas */
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#define BT_GATT_CCC_NOTIFY 0x0001
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#define BT_GATT_CCC_INDICATE 0x0002
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/* Client Characteristic Configuration Attribute Value */
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struct bt_gatt_ccc {
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uint16_t flags;
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};
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/* Server API */
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/** @brief Register attribute database
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*
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* Register GATT attribute database table. Applications can make use of
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* macros such as BT_GATT_PRIMARY_SERVICE, BT_GATT_CHARACTERISTIC,
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* BT_GATT_DESCRIPTOR, etc.
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*
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* @param attrs dabase table containing the available attributes
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* @param count size of database table
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*/
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void bt_gatt_register(const struct bt_gatt_attr *attrs, size_t count);
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/** @brief Generic Read Attribute value helper
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*
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* Read attribute value storing the result into buffer.
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*
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* @param attr attribute to read
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* @param buf buffer to store the value
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* @param buf_len buffer length
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* @param offset start offset
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* @param value attribute value
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* @param value_len length of the attribute value
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*
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* @return int number of bytes read in case of success or negative values in
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* case of error.
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*/
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int bt_gatt_attr_read(const struct bt_gatt_attr *attr, void *buf,
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uint8_t buf_len, uint16_t offset, const void *value,
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uint8_t value_len);
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/** @brief Read Service Attribute helper
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*
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* Read service attribute value storing the result into buffer after
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* enconding it.
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* NOTE: Only use this with attributes which user_data is a bt_uuid.
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*
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* @param attr attribute to read
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* @param buf buffer to store the value read
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* @param len buffer length
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* @param offset start offset
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*
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* @return int number of bytes read in case of success or negative values in
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* case of error.
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*/
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int bt_gatt_attr_read_service(const struct bt_gatt_attr *attr,
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void *buf, uint8_t len, uint16_t offset);
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/** @brief Generic Service Declaration Macro
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*
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* Helper macro to declare a service attribute.
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*
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* @param _handle service attribute handle
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* @param _uuid service attribute type
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* @param _data service attribute value
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*/
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#define BT_GATT_SERVICE(_handle, _uuid, _service) \
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{ \
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.handle = _handle, \
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.uuid = _uuid, \
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.read = bt_gatt_attr_read_service, \
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.user_data = _service, \
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}
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/** @brief Primary Service Declaration Macro
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*
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* Helper macro to declare a primary service attribute.
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*
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* @param _handle service attribute handle
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* @param _service service attribute value
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*/
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#define BT_GATT_PRIMARY_SERVICE(_handle, _service) \
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{ \
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.handle = _handle, \
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.uuid = (&(struct bt_uuid) { .type = BT_UUID_16, \
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.u16 = BT_UUID_GATT_PRIMARY }), \
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.read = bt_gatt_attr_read_service, \
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.user_data = _service, \
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}
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/** @brief Secondary Service Declaration Macro
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*
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* Helper macro to declare a secondary service attribute.
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*
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* @param _handle service attribute handle
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* @param _service service attribute value
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*/
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#define BT_GATT_SECONDARY_SERVICE(_handle, _service) \
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{ \
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.handle = _handle, \
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.uuid = (&(struct bt_uuid) { .type = BT_UUID_16, \
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.u16 = BT_UUID_GATT_SECONDARY }), \
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.read = bt_gatt_attr_read_service, \
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.user_data = _service, \
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}
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/** @brief Read Include Attribute helper
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*
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* Read include service attribute value storing the result into buffer after
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* enconding it.
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* NOTE: Only use this with attributes which user_data is a bt_gatt_include.
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*
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* @param attr attribute to read
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* @param buf buffer to store the value read
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* @param len buffer length
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* @param offset start offset
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*
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* @return int number of bytes read in case of success or negative values in
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* case of error.
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*/
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int bt_gatt_attr_read_included(const struct bt_gatt_attr *attr,
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void *buf, uint8_t len, uint16_t offset);
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/* Include Service Declaration */
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#define BT_GATT_INCLUDE_SERVICE(_handle, _service) \
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{ \
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.handle = _handle, \
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.uuid = (&(struct bt_uuid) { .type = BT_UUID_16, \
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.u16 = BT_UUID_GATT_INCLUDE }), \
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.read = bt_gatt_attr_read_included, \
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.user_data = _service, \
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}
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/** @brief Read Characteristic Attribute helper
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*
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* Read characteristic attribute value storing the result into buffer after
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* enconding it.
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* NOTE: Only use this with attributes which user_data is a bt_gatt_chrc.
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*
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* @param attr attribute to read
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* @param buf buffer to store the value read
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* @param len buffer length
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* @param offset start offset
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*
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* @return number of bytes read in case of success or negative values in
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* case of error.
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*/
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int bt_gatt_attr_read_chrc(const struct bt_gatt_attr *attr, void *buf,
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uint8_t len, uint16_t offset);
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/** @brief Characteristic Declaration Macro
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*
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* Helper macro to declare a characteristic attribute.
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*
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* @param _handle characteristic attribute handle
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* @param _value characteristic attribute value
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*/
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#define BT_GATT_CHARACTERISTIC(_handle, _value) \
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{ \
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.handle = _handle, \
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.uuid = (&(struct bt_uuid) { .type = BT_UUID_16, \
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.u16 = BT_UUID_GATT_CHRC }), \
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.read = bt_gatt_attr_read_chrc, \
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.user_data = _value, \
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}
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/** @brief Descriptor Declaration Macro
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*
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* Helper macro to declare a descriptor attribute.
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*
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* @param _handle descriptor attribute handle
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* @param _value descriptor attribute value
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*/
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#define BT_GATT_DESCRIPTOR(_handle, _uuid, _read, _write, _value) \
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{ \
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.handle = _handle, \
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.uuid = _uuid, \
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.read = _read, \
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.write = _write, \
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.user_data = _value, \
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}
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#endif /* __BT_GATT_H */
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@ -32,6 +32,18 @@
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#ifndef __BT_UUID_H
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#ifndef __BT_UUID_H
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#define __BT_UUID_H
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#define __BT_UUID_H
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#define BT_UUID_GAP 0x1800
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#define BT_UUID_GATT 0x1801
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#define BT_UUID_GATT_PRIMARY 0x2800
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#define BT_UUID_GATT_SECONDARY 0x2801
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#define BT_UUID_GATT_INCLUDE 0x2802
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#define BT_UUID_GATT_CHRC 0x2803
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#define BT_UUID_GATT_CEP 0x2900
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#define BT_UUID_GATT_CUD 0x2901
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#define BT_UUID_GATT_CCC 0x2902
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#define BT_UUID_GAP_DEVICE_NAME 0x2a00
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#define BT_UUID_GAP_APPEARANCE 0x2a01
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/* Bluetooth UUID types */
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/* Bluetooth UUID types */
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enum bt_uuid_type {
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enum bt_uuid_type {
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BT_UUID_16,
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BT_UUID_16,
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@ -41,6 +41,7 @@
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#include <bluetooth/hci.h>
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#include <bluetooth/hci.h>
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#include <bluetooth/bluetooth.h>
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#include <bluetooth/bluetooth.h>
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#include <bluetooth/uuid.h>
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#include <bluetooth/uuid.h>
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#include <bluetooth/gatt.h>
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#include "hci_core.h"
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#include "hci_core.h"
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#include "conn.h"
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#include "conn.h"
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150
net/bluetooth/gatt.c
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150
net/bluetooth/gatt.c
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/* gatt.c - Generic Attribute Profile 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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||||||
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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"
|
||||||
|
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
||||||
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
||||||
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
|
||||||
|
* 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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*/
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#include <nanokernel.h>
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#include <toolchain.h>
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#include <string.h>
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#include <errno.h>
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#include <misc/byteorder.h>
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#include <misc/util.h>
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#include <bluetooth/hci.h>
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#include <bluetooth/bluetooth.h>
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#include <bluetooth/buf.h>
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#include <bluetooth/uuid.h>
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#include <bluetooth/gatt.h>
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static const struct bt_gatt_attr *db = NULL;
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static size_t attr_count = 0;
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void bt_gatt_register(const struct bt_gatt_attr *attrs, size_t count)
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{
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db = attrs;
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attr_count = count;
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}
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int bt_gatt_attr_read(const struct bt_gatt_attr *attr, void *buf,
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uint8_t buf_len, uint16_t offset, const void *value,
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uint8_t value_len)
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{
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uint8_t len;
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if (offset > value_len) {
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return -EINVAL;
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}
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len = min(buf_len, value_len - offset);
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BT_DBG("handle %u offset %u length %u\n", attr->handle, offset, len);
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memcpy(buf, value + offset, len);
|
||||||
|
|
||||||
|
return len;
|
||||||
|
}
|
||||||
|
|
||||||
|
int bt_gatt_attr_read_service(const struct bt_gatt_attr *attr,
|
||||||
|
void *buf, uint8_t len, uint16_t offset)
|
||||||
|
{
|
||||||
|
struct bt_uuid *uuid = attr->user_data;
|
||||||
|
|
||||||
|
if (uuid->type == BT_UUID_16) {
|
||||||
|
uint16_t uuid16 = sys_cpu_to_le16(uuid->u16);
|
||||||
|
|
||||||
|
return bt_gatt_attr_read(attr, buf, len, offset, &uuid16,
|
||||||
|
sizeof(uuid16));
|
||||||
|
}
|
||||||
|
|
||||||
|
return bt_gatt_attr_read(attr, buf, len, offset, uuid->u128,
|
||||||
|
sizeof(uuid->u128));
|
||||||
|
}
|
||||||
|
|
||||||
|
struct gatt_incl {
|
||||||
|
uint16_t start_handle;
|
||||||
|
uint16_t end_handle;
|
||||||
|
union {
|
||||||
|
uint16_t uuid16;
|
||||||
|
uint8_t uuid[16];
|
||||||
|
};
|
||||||
|
} PACK_STRUCT;
|
||||||
|
|
||||||
|
int bt_gatt_attr_read_include(struct bt_gatt_attr *attr, void *buf, uint8_t len,
|
||||||
|
uint16_t offset)
|
||||||
|
{
|
||||||
|
struct bt_gatt_include *incl = attr->user_data;
|
||||||
|
struct gatt_incl pdu;
|
||||||
|
uint8_t value_len;
|
||||||
|
|
||||||
|
pdu.start_handle = sys_cpu_to_le16(incl->start_handle);
|
||||||
|
pdu.end_handle = sys_cpu_to_le16(incl->end_handle);
|
||||||
|
value_len = sizeof(pdu.start_handle) + sizeof(pdu.end_handle);
|
||||||
|
|
||||||
|
if (incl->uuid->type == BT_UUID_16) {
|
||||||
|
pdu.uuid16 = sys_cpu_to_le16(incl->uuid->u16);
|
||||||
|
value_len += sizeof(pdu.uuid16);
|
||||||
|
} else {
|
||||||
|
memcpy(pdu.uuid, incl->uuid->u128, sizeof(incl->uuid->u128));
|
||||||
|
value_len += sizeof(incl->uuid->u128);
|
||||||
|
}
|
||||||
|
|
||||||
|
return bt_gatt_attr_read(attr, buf, len, offset, &pdu, value_len);
|
||||||
|
}
|
||||||
|
|
||||||
|
struct gatt_chrc {
|
||||||
|
uint8_t properties;
|
||||||
|
uint16_t value_handle;
|
||||||
|
union {
|
||||||
|
uint16_t uuid16;
|
||||||
|
uint8_t uuid[16];
|
||||||
|
};
|
||||||
|
} PACK_STRUCT;
|
||||||
|
|
||||||
|
int bt_gatt_attr_read_chrc(const struct bt_gatt_attr *attr, void *buf,
|
||||||
|
uint8_t len, uint16_t offset)
|
||||||
|
{
|
||||||
|
struct bt_gatt_chrc *chrc = attr->user_data;
|
||||||
|
struct gatt_chrc pdu;
|
||||||
|
uint8_t value_len;
|
||||||
|
|
||||||
|
pdu.properties = chrc->properties;
|
||||||
|
pdu.value_handle = sys_cpu_to_le16(chrc->value_handle);
|
||||||
|
value_len = sizeof(pdu.properties) + sizeof(pdu.value_handle);
|
||||||
|
|
||||||
|
if (chrc->uuid->type == BT_UUID_16) {
|
||||||
|
pdu.uuid16 = sys_cpu_to_le16(chrc->uuid->u16);
|
||||||
|
value_len += sizeof(pdu.uuid16);
|
||||||
|
} else {
|
||||||
|
memcpy(pdu.uuid, chrc->uuid->u128, sizeof(chrc->uuid->u128));
|
||||||
|
value_len = sizeof(chrc->uuid->u128);
|
||||||
|
}
|
||||||
|
|
||||||
|
return bt_gatt_attr_read(attr, buf, len, offset, &pdu, value_len);
|
||||||
|
}
|
||||||
Loading…
Add table
Add a link
Reference in a new issue