OVMS3-idf/components/bt/bluedroid/api/include/esp_gatts_api.h

// Copyright 2015-2016 Espressif Systems (Shanghai) PTE LTD
//
// 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 __ESP_GATTS_API_H__
#define __ESP_GATTS_API_H__

#include "esp_bt_defs.h"
#include "esp_gatt_defs.h"
#include "esp_err.h"

#ifdef __cplusplus
extern "C" {
#endif

/// GATT Server callback function events
typedef enum {
	ESP_GATTS_REG_EVT                = 0,		/*!< When register application id, the event comes */
	ESP_GATTS_READ_EVT               = 1,		/*!< When gatt client request read operation, the event comes */
	ESP_GATTS_WRITE_EVT              = 2,		/*!< When gatt client request write operation, the event comes */
	ESP_GATTS_EXEC_WRITE_EVT         = 3,		/*!< When gatt client request execute write, the event comes */
	ESP_GATTS_MTU_EVT                = 4,		/*!< When set mtu complete, the event comes */
	ESP_GATTS_CONF_EVT               = 5,		/*!< When receive confirm, the event comes */
	ESP_GATTS_UNREG_EVT              = 6,		/*!< When unregister application id, the event comes */
	ESP_GATTS_CREATE_EVT             = 7,		/*!< When create service complete, the event comes */
	ESP_GATTS_ADD_INCL_SRVC_EVT      = 8,		/*!< When add included service complete, the event comes */
	ESP_GATTS_ADD_CHAR_EVT           = 9,		/*!< When add characteristic complete, the event comes */
	ESP_GATTS_ADD_CHAR_DESCR_EVT     = 10,		/*!< When add descriptor complete, the event comes */
	ESP_GATTS_DELETE_EVT             = 11,		/*!< When delete service complete, the event comes */
	ESP_GATTS_START_EVT              = 12,		/*!< When start service complete, the event comes */
	ESP_GATTS_STOP_EVT               = 13,		/*!< When stop service complete, the event comes */
	ESP_GATTS_CONNECT_EVT            = 14,		/*!< When gatt client connect, the event comes */
	ESP_GATTS_DISCONNECT_EVT         = 15,		/*!< When gatt client disconnect, the event comes */
	ESP_GATTS_OPEN_EVT               = 16,		/*!< When connect to peer, the event comes */
	ESP_GATTS_CANCEL_OPEN_EVT        = 17,		/*!< When disconnect from peer, the event comes */
	ESP_GATTS_CLOSE_EVT              = 18,		/*!< When gatt server close, the event comes */
	ESP_GATTS_LISTEN_EVT             = 19,		/*!< When gatt listen to be connected the event comes */
	ESP_GATTS_CONGEST_EVT            = 20,		/*!< When congest happen, the event comes */
	/* following is extra event */
	ESP_GATTS_RESPONSE_EVT           = 21,		/*!< When gatt send response complete, the event comes */
} esp_gatts_cb_event_t;

/**
 * @brief Gatt server callback parameters union
 */
typedef union {
    /**
     * @brief ESP_GATTS_REG_EVT
     */
    struct gatts_reg_evt_param {
        esp_gatt_status_t status;						/*!< Operation status */
        uint16_t app_id;				/*!< Application id which input in register API */
    } reg;								/*!< Gatt server callback param of ESP_GATTS_REG_EVT */

    /**
     * @brief ESP_GATTS_READ_EVT
     */
    struct gatts_read_evt_param {
        uint16_t conn_id;				/*!< Connection id */
        uint32_t trans_id;				/*!< Transfer id */
        esp_bd_addr_t bda;				/*!< The bluetooth device address which been read */
        uint16_t handle;				/*!< The attribute handle */
        uint16_t offset;				/*!< Offset of the value, if the value is too long */
        bool is_long;					/*!< The value is too long or not */
    } read;								/*!< Gatt server callback param of ESP_GATTS_READ_EVT */

    /**
     * @brief ESP_GATTS_WRITE_EVT
     */
    struct gatts_write_evt_param {
        uint16_t conn_id;				/*!< Connection id */
        uint32_t trans_id;				/*!< Transfer id */
        esp_bd_addr_t bda;				/*!< The bluetooth device address which been written */
        uint16_t handle;				/*!< The attribute handle */
        uint16_t offset;				/*!< Offset of the value, if the value is too long */
        bool need_rsp;					/*!< The write operation need to do response */
        bool is_prep;					/*!< This write operation is prepare write */
        uint16_t len;					/*!< The write attribute value length */
        uint8_t *value;					/*!< The write attribute value */
    } write;							/*!< Gatt server callback param of ESP_GATTS_WRITE_EVT */

    /**
     * @brief ESP_GATTS_EXEC_WRITE_EVT
     */
    struct gatts_exec_write_evt_param {
        uint16_t conn_id;				/*!< Connection id */
        uint32_t trans_id;				/*!< Transfer id */
        esp_bd_addr_t bda;				/*!< The bluetooth device address which been written */
#define ESP_GATT_PREP_WRITE_CANCEL   0x00
#define ESP_GATT_PREP_WRITE_EXEC     0x01
        uint8_t exec_write_flag;		/*!< Execute write flag */
    } exec_write;						/*!< Gatt server callback param of ESP_GATTS_EXEC_WRITE_EVT */

    /**
     * @brief ESP_GATTS_MTU_EVT
     */
    struct gatts_mtu_evt_param {
        uint16_t conn_id;				/*!< Connection id */
        uint16_t mtu;					/*!< MTU size */
    } mtu;								/*!< Gatt server callback param of ESP_GATTS_MTU_EVT */

    /**
     * @brief ESP_GATTS_CONF_EVT
     */
    struct gatts_conf_evt_param {
        esp_gatt_status_t status;		/*!< Operation status */
        uint16_t conn_id;				/*!< Connection id */
    } conf;								/*!< Gatt server callback param of ESP_GATTS_CONF_EVT (confirm) */

    /**
     * @brief ESP_GATTS_UNREG_EVT
     */

    /**
     * @brief ESP_GATTS_CREATE_EVT
     */
    struct gatts_create_evt_param {
        esp_gatt_status_t status;		/*!< Operation status */
        uint16_t service_handle; 		/*!< Service attribute handle */
        esp_gatt_srvc_id_t service_id;	/*!< Service id, include service uuid and other information */
    } create;							/*!< Gatt server callback param of ESP_GATTS_CREATE_EVT */

    /**
     * @brief ESP_GATTS_ADD_INCL_SRVC_EVT
     */
    struct gatts_add_incl_srvc_evt_param {
        esp_gatt_status_t status;		/*!< Operation status */
        uint16_t attr_handle;			/*!< Included service attribute handle */
        uint16_t service_handle;		/*!< Service attribute handle */
    } add_incl_srvc;					/*!< Gatt server callback param of ESP_GATTS_ADD_INCL_SRVC_EVT */

    /**
     * @brief ESP_GATTS_ADD_CHAR_EVT
     */
    struct gatts_add_char_evt_param {
        esp_gatt_status_t status;		/*!< Operation status */
        uint16_t attr_handle;			/*!< Characteristic attribute handle */
        uint16_t service_handle;		/*!< Service attribute handle */
        esp_bt_uuid_t char_uuid;		/*!< Characteristic uuid */
    } add_char;							/*!< Gatt server callback param of ESP_GATTS_ADD_CHAR_EVT */

    /**
     * @brief ESP_GATTS_ADD_CHAR_DESCR_EVT
     */
    struct gatts_add_char_descr_evt_param {
        esp_gatt_status_t status;		/*!< Operation status */
        uint16_t attr_handle;			/*!< Descriptor attribute handle */
        uint16_t service_handle;		/*!< Service attribute handle */
        esp_bt_uuid_t char_uuid;		/*!< Characteristic uuid */
    } add_char_descr;					/*!< Gatt server callback param of ESP_GATTS_ADD_CHAR_DESCR_EVT */

    /**
     * @brief ESP_GATTS_DELETE_EVT
     */
    struct gatts_delete_evt_param {
        esp_gatt_status_t status;		/*!< Operation status */
        uint16_t service_handle;		/*!< Service attribute handle */
    } del;								/*!< Gatt server callback param of ESP_GATTS_DELETE_EVT */

    /**
     * @brief ESP_GATTS_START_EVT
     */
    struct gatts_start_evt_param {
        esp_gatt_status_t status;		/*!< Operation status */
        uint16_t service_handle;		/*!< Service attribute handle */
    } start;							/*!< Gatt server callback param of ESP_GATTS_START_EVT */

    /**
     * @brief ESP_GATTS_STOP_EVT
     */
    struct gatts_stop_evt_param {
        esp_gatt_status_t status;		/*!< Operation status */
        uint16_t service_handle;		/*!< Service attribute handle */
    } stop;								/*!< Gatt server callback param of ESP_GATTS_STOP_EVT */

    /**
     * @brief ESP_GATTS_CONNECT_EVT
     */
    struct gatts_connect_evt_param {
        uint16_t conn_id;				/*!< Connection id */
        esp_bd_addr_t remote_bda;		/*!< Remote bluetooth device address */
        bool is_connected;				/*!< Indicate it is connected or not */
    } connect;							/*!< Gatt server callback param of ESP_GATTS_CONNECT_EVT */

    /**
     * @brief ESP_GATTS_DISCONNECT_EVT
     */
    struct gatts_disconnect_evt_param {
        uint16_t conn_id;				/*!< Connection id */
        esp_bd_addr_t remote_bda;		/*!< Remote bluetooth device address */
        bool is_connected;				/*!< Indicate it is connected or not */
    } disconnect;						/*!< Gatt server callback param of ESP_GATTS_DISCONNECT_EVT */

    /**
     * @brief ESP_GATTS_OPEN_EVT
     */
    /**
     * @brief ESP_GATTS_CANCEL_OPEN_EVT
     */
    /**
     * @brief ESP_GATTS_CLOSE_EVT
     */
    /**
     * @brief ESP_GATTS_LISTEN_EVT
     */
    /**
     * @brief ESP_GATTS_CONGEST_EVT
     */
    struct gatts_congest_evt_param {
        uint16_t conn_id;				/*!< Connection id */
        bool congested;					/*!< Congested or not */
    } congest;							/*!< Gatt server callback param of ESP_GATTS_CONGEST_EVT */

    /**
     * @brief ESP_GATTS_RESPONSE_EVT
     */
    struct gatts_rsp_evt_param {
        esp_gatt_status_t status;						/*!< Operation status */
        uint16_t handle;				/*!< Attribute handle which send response */
    } rsp;								/*!< Gatt server callback param of ESP_GATTS_RESPONSE_EVT */
} esp_ble_gatts_cb_param_t;

/**
 * @brief GATT Server callback function type
 * @param event : Event type
 * @param gatts_if : GATT server access interface, normally
 *                   different gatts_if correspond to different profile
 * @param param : Point to callback parameter, currently is union type
 */
typedef void (* esp_gatts_cb_t)(esp_gatts_cb_event_t event, esp_gatt_if_t gatts_if, esp_ble_gatts_cb_param_t *param);

/**
 * @brief           This function is called to register application callbacks
 *                  with BTA GATTS module.
 *
 * @return
 *                  - ESP_OK : success
 *                  - other  : failed
 *
 */
esp_err_t esp_ble_gatts_register_callback(esp_gatts_cb_t callback);

/**
 * @brief           This function is called to register application identifier
 *
 * @return
 *                  - ESP_OK : success
 *                  - other  : failed
 *
 */
esp_err_t esp_ble_gatts_app_register(uint16_t app_id);



/**
 * @brief           unregister with GATT Server.
 *
 * @param[in]       gatts_if: GATT server access interface
 * @return
 *                  - ESP_OK : success
 *                  - other  : failed
 *
 */
esp_err_t esp_ble_gatts_app_unregister(esp_gatt_if_t gatts_if);


/**
 * @brief           Create a service. When service creation is done, a callback
 *                  event BTA_GATTS_CREATE_SRVC_EVT is called to report status
 *                  and service ID to the profile. The service ID obtained in
 *                  the callback function needs to be used when adding included
 *                  service and characteristics/descriptors into the service.
 *
 * @param[in]       gatts_if: GATT server access interface
 * @param[in]       service_id: service ID.
 * @param[in]       num_handle: number of handle requested for this service.
 *
 * @return
 *                  - ESP_OK : success
 *                  - other  : failed
 *
 */
esp_err_t esp_ble_gatts_create_service(esp_gatt_if_t gatts_if,
                                       esp_gatt_srvc_id_t *service_id, uint16_t num_handle);



/**
 * @brief           This function is called to add an included service. After included
 *                  service is included, a callback event BTA_GATTS_ADD_INCL_SRVC_EVT
 *                  is reported the included service ID.
 *
 * @param[in]       service_handle: service handle to which this included service is to
 *                  be added.
 * @param[in]       included_service_handle: the service ID to be included.
 *
 * @return
 *                  - ESP_OK : success
 *                  - other  : failed
 *
 */
esp_err_t esp_ble_gatts_add_included_service(uint16_t service_handle, uint16_t included_service_handle);



/**
 * @brief           This function is called to add a characteristic into a service.
 *
 * @param[in]       service_handle: service handle to which this included service is to
 *                  be added.
 * @param[in]       char_uuid : Characteristic UUID.
 * @param[in]       perm      : Characteristic value declaration attribute permission.
 * @param[in]       property  : Characteristic Properties
 *
 * @return
 *                  - ESP_OK : success
 *                  - other  : failed
 *
 */
esp_err_t esp_ble_gatts_add_char(uint16_t service_handle,  esp_bt_uuid_t  *char_uuid,
                                 esp_gatt_perm_t perm, esp_gatt_char_prop_t property);


/**
 * @brief           This function is called to add characteristic descriptor. When
 *                  it's done, a callback event BTA_GATTS_ADD_DESCR_EVT is called
 *                  to report the status and an ID number for this descriptor.
 *
 * @param[in]       service_handle: service handle to which this characteristic descriptor is to
 *                              be added.
 * @param[in]       perm: descriptor access permission.
 * @param[in]       descr_uuid: descriptor UUID.
 *
 * @return
 *                  - ESP_OK : success
 *                  - other  : failed
 *
 */
esp_err_t esp_ble_gatts_add_char_descr (uint16_t service_handle,
                                        esp_bt_uuid_t  *descr_uuid,
                                        esp_gatt_perm_t perm);



/**
 * @brief           This function is called to delete a service. When this is done,
 *                  a callback event BTA_GATTS_DELETE_EVT is report with the status.
 *
 * @param[in]       service_handle: service_handle to be deleted.
 *
 * @return
 *                  - ESP_OK : success
 *                  - other  : failed
 *
 */
esp_err_t esp_ble_gatts_delete_service(uint16_t service_handle);



/**
 * @brief           This function is called to start a service.
 *
 * @param[in]       service_handle: the service handle to be started.
 *
 * @return
 *                  - ESP_OK : success
 *                  - other  : failed
 *
 */
esp_err_t esp_ble_gatts_start_service(uint16_t service_handle);



/**
 * @brief           This function is called to stop a service.
 *
 * @param[in]       service_handle - service to be topped.
 *
 * @return
 *                  - ESP_OK : success
 *                  - other  : failed
 *
 */
esp_err_t esp_ble_gatts_stop_service(uint16_t service_handle);



/**
 * @brief           This function is called to read a characteristics descriptor.
 *
 * @param[in]       gatts_if: GATT server access interface
 * @param[in]       conn_id - connection id to indicate.
 * @param[in]       attr_handle - attribute handle to indicate.
 * @param[in]       value_len - indicate value length.
 * @param[in]       value: value to indicate.
 * @param[in]       need_confirm - if this indication expects a confirmation or not.
 *
 * @return
 *                  - ESP_OK : success
 *                  - other  : failed
 *
 */
esp_err_t esp_ble_gatts_send_indicate(esp_gatt_if_t gatts_if, uint16_t conn_id, uint16_t attr_handle,
                                      uint16_t value_len, uint8_t *value, bool need_confirm);


/**
 * @brief           This function is called to send a response to a request.
 *
 * @param[in]       gatts_if: GATT server access interface
 * @param[in]       conn_id - connection identifier.
 * @param[in]       trans_id - transfer id
 * @param[in]       status - response status
 * @param[in]       rsp - response data.
 *
 * @return
 *                  - ESP_OK : success
 *                  - other  : failed
 *
 */
esp_err_t esp_ble_gatts_send_response(esp_gatt_if_t gatts_if, uint16_t conn_id, uint32_t trans_id,
                                      esp_gatt_status_t status, esp_gatt_rsp_t *rsp);


/**
 * @brief           Open a direct open connection or add a background auto connection
 *
 * @param[in]       gatts_if: GATT server access interface
 * @param[in]       remote_bda: remote device bluetooth device address.
 * @param[in]       is_direct: direct connection or background auto connection
 *
 * @return
 *                  - ESP_OK : success
 *                  - other  : failed
 *
 */
esp_err_t esp_ble_gatts_open(esp_gatt_if_t gatts_if, esp_bd_addr_t remote_bda, bool is_direct);

/**
 * @brief           Close a connection  a remote device.
 *
 * @param[in]       gatts_if: GATT server access interface
 * @param[in]       conn_id: connection ID to be closed.
 *
 * @return
 *                  - ESP_OK : success
 *                  - other  : failed
 *
 */
esp_err_t esp_ble_gatts_close(esp_gatt_if_t gatts_if, uint16_t conn_id);

#ifdef __cplusplus
}
#endif

#endif /* __ESP_GATTS_API_H__ */