xref: /btstack/src/ble/att_db_util.h (revision 87e52a097b589e14e7cbce41276b5cb7f0fc4822)

/*
 * Copyright (C) 2014 BlueKitchen GmbH
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 *    from this software without specific prior written permission.
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 * THIS SOFTWARE IS PROVIDED BY BLUEKITCHEN GMBH AND CONTRIBUTORS
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/**
 * @title Runtine ATT Database Setup
 *
 * Helper to construct ATT DB at runtime (BTstack GATT Compiler is not used).
 *
 */

#ifndef ATT_DB_UTIL_H
#define ATT_DB_UTIL_H

#include "btstack_config.h"
#include "btstack_crypto.h"

#include <stdint.h>

#if defined __cplusplus
extern "C" {
#endif

/* API_START */

/**
 * @brief Init ATT DB storage
 */
void att_db_util_init(void);

/**
 * @brief Set handle value for next table entry
 * @param handle
 * @note new handle must be >= previous to avoid reusing assigned handles
 */
void att_db_util_set_next_handle(uint16_t handle);

/**
 * @brief Add primary service for 16-bit UUID
 * @param uuid16
 * @return attribute handle for the new service definition
 */
uint16_t att_db_util_add_service_uuid16(uint16_t uuid16);

/**
 * @brief Add primary service for 128-bit UUID
 * @param uuid128
 * @return attribute handle for the new service definition
 */
uint16_t att_db_util_add_service_uuid128(const uint8_t * uuid128);

/**
 * @brief Add secondary service for 16-bit UUID
 * @param uuid16
 * @return attribute handle for the new service definition
 */
uint16_t att_db_util_add_secondary_service_uuid16(uint16_t uuid16);

/**
 * @brief Add secondary service for 128-bit UUID
 * @param uuid128
 * @return attribute handle for the new service definition
 */
uint16_t att_db_util_add_secondary_service_uuid128(const uint8_t * uuid128);

/**
 * @brief Add included service with 16-bit UUID
 * @param start_group_handle
 * @param end_group_handle
 * @param uuid16
 * @return attribute handle for the new service definition
 */
uint16_t att_db_util_add_included_service_uuid16(uint16_t start_group_handle, uint16_t  end_group_handle, uint16_t uuid16);

/**
 * @brief Add Characteristic with 16-bit UUID, properties, and data
 * @param uuid16
 * @param properties        - see ATT_PROPERTY_* in src/bluetooth.h
 * @param read_permissions  - see ATT_SECURITY_* in src/bluetooth.h
 * @param write_permissions - see ATT_SECURITY_* in src/bluetooth.h
 * @param data returned in read operations if ATT_PROPERTY_DYNAMIC is not specified
 * @param data_len
 * @return attribute handle of the new characteristic value declaration
 * @note If properties contains ATT_PROPERTY_NOTIFY or ATT_PROPERTY_INDICATE flags, a Client Configuration Characteristic Descriptor (CCCD)
 *       is created as well. The attribute value handle of the CCCD is the attribute value handle plus 1
 */
uint16_t att_db_util_add_characteristic_uuid16(uint16_t uuid16, uint16_t properties, uint8_t read_permission, uint8_t write_permission, uint8_t * data, uint16_t data_len);

/**
 * @brief Add Characteristic with 128-bit UUID, properties, and data
 * @param uuid128
 * @param properties        - see ATT_PROPERTY_* in src/bluetooth.h
 * @param read_permissions  - see ATT_SECURITY_* in src/bluetooth.h
 * @param write_permissions - see ATT_SECURITY_* in src/bluetooth.h
 * @param data returned in read operations if ATT_PROPERTY_DYNAMIC is not specified
 * @param data_len
 * @return attribute handle of the new characteristic value declaration
 * @note If properties contains ATT_PROPERTY_NOTIFY or ATT_PROPERTY_INDICATE flags, a Client Configuration Characteristic Descriptor (CCCD)
 *       is created as well. The attribute value handle of the CCCD is the attribute value handle plus 1
 */
uint16_t att_db_util_add_characteristic_uuid128(const uint8_t * uuid128, uint16_t properties, uint8_t read_permission, uint8_t write_permission, uint8_t * data, uint16_t data_len);

/**
* @brief Add descriptor with 16-bit UUID, properties, and data
* @param uuid16
* @param properties        - see ATT_PROPERTY_* in src/bluetooth.h
* @param read_permissions  - see ATT_SECURITY_* in src/bluetooth.h
* @param write_permissions - see ATT_SECURITY_* in src/bluetooth.h
* @param data returned in read operations if ATT_PROPERTY_DYNAMIC is not specified
* @param data_len
* @return attribute handle of the new characteristic descriptor declaration
*/
uint16_t att_db_util_add_descriptor_uuid16(uint16_t uuid16, uint16_t properties, uint8_t read_permission, uint8_t write_permission, uint8_t * data, uint16_t data_len);

/**
* @brief Add descriptor with 128-bit UUID, properties, and data
* @param uuid128
* @param properties        - see ATT_PROPERTY_* in src/bluetooth.h
* @param read_permissions  - see ATT_SECURITY_* in src/bluetooth.h
* @param write_permissions - see ATT_SECURITY_* in src/bluetooth.h
* @param data returned in read operations if ATT_PROPERTY_DYNAMIC is not specified
* @param data_len
* @return attribute handle of the new characteristic descriptor declaration
*/
uint16_t att_db_util_add_descriptor_uuid128(const uint8_t * uuid128, uint16_t properties, uint8_t read_permission, uint8_t write_permission, uint8_t * data, uint16_t data_len);

/**
 * @brief Get address of constructed ATT DB
 */
uint8_t * att_db_util_get_address(void);

/**
 * @brief Get size of constructed ATT DB
 */
uint16_t att_db_util_get_size(void);

/**
 * @brief Get number of bytes that are included in GATT Database Hash
 */
uint16_t att_db_util_hash_len(void);

/**
 * @brief init generator for GATT Database Hash
 */
void att_db_util_hash_init(void);

/**
 * @brief get next byte from generator for GATT Database Hash
 */
uint8_t att_db_util_hash_get_next(void);

/**
 * @brief Calculate GATT Database Hash using crypto engine
 * @param request
 * @param db_hash
 * @param callback
 * @param callback_arg
 */
void att_db_util_hash_calc(btstack_crypto_aes128_cmac_t * request, uint8_t * db_hash, void (* callback)(void * arg), void * callback_arg);

/* API_END */

#if defined __cplusplus
}
#endif
#endif