Diff: TARGET_SDT51822B/TOOLCHAIN_ARM_STD/gatt_cache_manager.h

Revision:

171:3a7713b1edbc

Parent:

169:a7c7b631e539

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/TARGET_SDT51822B/TOOLCHAIN_ARM_STD/gatt_cache_manager.h	Thu Nov 08 11:45:42 2018 +0000
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+/* 
+ * Copyright (c) 2015 Nordic Semiconductor ASA
+ * All rights reserved.
+ * 
+ * Redistribution and use in source and binary forms, with or without modification,
+ * are permitted provided that the following conditions are met:
+ * 
+ *   1. Redistributions of source code must retain the above copyright notice, this list 
+ *      of conditions and the following disclaimer.
+ *
+ *   2. Redistributions in binary form, except as embedded into a Nordic Semiconductor ASA 
+ *      integrated circuit in a product or a software update for such product, must reproduce 
+ *      the above copyright notice, this list of conditions and the following disclaimer in 
+ *      the documentation and/or other materials provided with the distribution.
+ *
+ *   3. Neither the name of Nordic Semiconductor ASA nor the names of its contributors may be 
+ *      used to endorse or promote products derived from this software without specific prior 
+ *      written permission.
+ *
+ *   4. This software, with or without modification, must only be used with a 
+ *      Nordic Semiconductor ASA integrated circuit.
+ *
+ *   5. Any software provided in binary or object form under this license must not be reverse 
+ *      engineered, decompiled, modified and/or disassembled. 
+ * 
+ * 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 CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ * 
+ */
+
+
+
+#ifndef GATT_CACHE_MANAGER_H__
+#define GATT_CACHE_MANAGER_H__
+
+#include <stdint.h>
+#include "sdk_errors.h"
+#include "nrf_ble.h"
+#include "nrf_ble_gap.h"
+#include "peer_manager_types.h"
+
+
+
+/**
+ * @cond NO_DOXYGEN
+ * @defgroup gatt_cache_manager GATT Cache Manager
+ * @ingroup peer_manager
+ * @{
+ * @brief An internal module of @ref peer_manager. A module for managing persistent storing of GATT
+ *        attributes.
+ */
+
+
+/**@brief Events that can come from the GATT Cache Manager module.
+ */
+typedef enum
+{
+    GCM_EVT_LOCAL_DB_CACHE_STORED,           /**< The persistent cache for the local database has been updated with provided values, for one peer. */
+    GCM_EVT_LOCAL_DB_CACHE_UPDATED,          /**< The persistent cache for the local database has been updated with values from the SoftDevice, for one peer. */
+    GCM_EVT_LOCAL_DB_CACHE_APPLIED,          /**< The SoftDevice has been given local database values from the persistent cache, for one peer. */
+    GCM_EVT_ERROR_LOCAL_DB_CACHE_APPLY,      /**< The stored local database values for a peer were rejected by the SoftDevice, which means the database has changed. */
+    GCM_EVT_REMOTE_DB_CACHE_UPDATED,         /**< The persistent cache for the remote database has been updated with provided values, for one peer. */
+    GCM_EVT_SERVICE_CHANGED_IND_SENT,        /**< A service changed indication has been sent to a peer. */
+    GCM_EVT_SERVICE_CHANGED_IND_CONFIRMED,   /**< A sent service changed indication has been confirmed by a peer. */
+    GCM_EVT_ERROR_DATA_SIZE,                 /**< An operation failed because the write buffer of the Peer Database module was not large enough. This is a fatal error. */
+    GCM_EVT_ERROR_STORAGE_FULL,              /**< An operation failed because there was no available storage room in persistent storage. Please free up room, and the operation will automatically continue. */
+    GCM_EVT_ERROR_UNEXPECTED,                /**< An operation failed with an unexpected error. The error is provided. This is possibly a fatal error. */
+} gcm_evt_id_t;
+
+
+/**@brief A structure meant to be used for event parameters for multiple event types.
+ */
+typedef struct
+{
+    uint16_t conn_handle;  /**< The connection handle. Likely the connection handle an event pertains to. */
+} gcm_evt_param_conn_handle_t;
+
+
+/**@brief Structure containing an event from the GCM module.
+ */
+typedef struct
+{
+    gcm_evt_id_t   evt_id;  /**< The type of event this is. */
+    pm_peer_id_t   peer_id; /**< The peer ID this event pertains to. */
+    union
+    {
+        gcm_evt_param_conn_handle_t local_db_cache_updated;
+        gcm_evt_param_conn_handle_t local_db_cache_applied;
+        gcm_evt_param_conn_handle_t error_local_db_cache_apply;
+        gcm_evt_param_conn_handle_t service_changed_ind_sent;
+        gcm_evt_param_conn_handle_t service_changed_ind_confirmed;
+        gcm_evt_param_conn_handle_t error_data_size;
+        gcm_evt_param_conn_handle_t error_no_mem;
+        struct
+        {
+            uint16_t   conn_handle; /**< The handle of the connection the event pertains to. */
+            ret_code_t error;       /**< The unexpected error that occurred. */
+        } error_unexpected;
+    } params; /**< Event specific parameters. Chosen based on evt_id. */
+} gcm_evt_t;
+
+/**@brief Event handler for events from the GATT Cache Manager module.
+ *
+ * @param[in]  event   The event that has happened.
+ * @param[in]  peer  The id of the peer the event pertains to.
+ * @param[in]  flags   The data the event pertains to.
+ */
+typedef void (*gcm_evt_handler_t)(gcm_evt_t const * p_event);
+
+
+/**@brief Function for initializing the GATT Cache Manager module.
+ *
+ * @param[in]  evt_handler  Callback for events from the GATT Cache Manager module.
+ *
+ * @retval NRF_SUCCESS     Initialization was successful.
+ * @retval NRF_ERROR_NULL  evt_handler was NULL.
+ */
+ret_code_t gcm_init(gcm_evt_handler_t evt_handler);
+
+
+/**@brief Function for dispatching SoftDevice events to the GATT Cache Manager module.
+ *
+ * @param[in]  p_ble_evt  The SoftDevice event.
+ */
+void gcm_ble_evt_handler(ble_evt_t * p_ble_evt);
+
+
+
+/**@brief Function for storing a discovered remote database persistently.
+ *
+ * @param[in]  peer_id      Peer to store the database for.
+ * @param[in]  p_remote_db  Database values to store as an array. Can be NULL if n_services is 0.
+ * @param[in]  n_services   Number of services in p_remote_db array. If 0, values are cleared.
+ *
+ * @retval NRF_SUCCESS              Store procedure successfully started.
+ * @retval NRF_ERROR_NOT_FOUND      The peer id is invalid or unallocated.
+ * @retval NRF_ERROR_INVALID_STATE  Module is not initialized.
+ */
+ret_code_t gcm_remote_db_store(pm_peer_id_t        peer_id,
+                               ble_gatt_db_srv_t * p_remote_db,
+                               uint32_t            n_services);
+
+
+/**@brief Function for retrieving a persistently stored remote database.
+ *
+ * @param[in]    peer_id      Peer to retrieve data for.
+ * @param[out]   p_remote_db  If p_n_services was large enough: Copied database values.
+ * @param[inout] p_n_services In: Size of provided p_remote_db array. Out: Size of data in flash.
+ *
+ * @note p_n_services is always updated with the size of the data to be retrieved. The data is only
+ *       copied if p_remote_db is large enough (p_n_services is large enough initially).
+ *
+ * @retval NRF_SUCCESS              Data retrieved successfully.
+ * @retval NRF_ERROR_NOT_FOUND      The peer ID is invalid or unallocated.
+ * @retval NRF_ERROR_NULL           p_remote_db is NULL.
+ * @retval NRF_ERROR_INVALID_STATE  Module is not initialized.
+ */
+ret_code_t gcm_remote_db_retrieve(pm_peer_id_t        peer_id,
+                                  ble_gatt_db_srv_t * p_remote_db,
+                                  uint32_t          * p_n_services);
+
+
+/**@brief Function for triggering local GATT database data to be stored persistently. Values are
+ *        retrieved from SoftDevice and written to persistent storage.
+ *
+ * @note This function is only needed when you want to override the regular functionality of the
+ *       module, e.g. to immediately store to flash instead of waiting for the native logic to
+ *       perform the update.
+ *
+ * @param[in]  conn_handle  Connection handle to perform update on.
+ *
+ * @retval NRF_SUCCESS                    Store operation started.
+ * @retval BLE_ERROR_INVALID_CONN_HANDLE  conn_handle does not refer to an active, bonded connection.
+ * @retval NRF_ERROR_DATA_SIZE            Write buffer not large enough. Call will never work with
+ *                                        this GATT database.
+ * @retval NRF_ERROR_NO_MEM               No room in persistent_storage. Free up space; the
+ *                                        operation will be automatically reattempted after the
+ *                                        next compression procedure
+ * @retval NRF_ERROR_INVALID_STATE        Module is not initialized.
+ */
+ret_code_t gcm_local_db_cache_update(uint16_t conn_handle);
+
+
+/**@brief Function for setting new values in the local database cache.
+ *
+ * @note If the peer is connected, the values will also be applied immediately to the connection.
+ * @note This function is only needed when you want to override the regular functionality of the
+ *       module.
+ * @note The data in the pointer must be available until the GCM_EVT_LOCAL_DB_CACHE_SET event is
+ *       received.
+ *
+ * @param[in]  peer_id     Peer to set values for.
+ * @param[in]  p_local_db  Database values to apply. If NULL, the values will instead be cleared.
+ *
+ * @retval NRF_SUCCESS              Operation started, and values were applied (if connected).
+ * @retval NRF_ERROR_NOT_FOUND      The peer ID was invalid or unallocated.
+ * @retval NRF_ERROR_INVALID_STATE  Module is not initialized.
+ */
+ret_code_t gcm_local_db_cache_set(pm_peer_id_t peer_id, pm_peer_data_local_gatt_db_t * p_local_db);
+
+
+/**@brief Function for retrieving values in the local database cache.
+ *
+ * @note This function is not needed for regular operation of the module.
+ *
+ * @param[in]  peer_id     Peer to get values for.
+ * @param[out] p_local_db  Database values.
+ *
+ * @retval NRF_SUCCESS              Values retrieved successfully.
+ * @retval NRF_ERROR_NOT_FOUND      The peer ID was invalid or unallocated.
+ * @retval NRF_ERROR_NULL           p_local_db was NULL.
+ * @retval NRF_ERROR_INVALID_STATE  Module is not initialized.
+ */
+ret_code_t gcm_local_db_cache_get(pm_peer_id_t peer_id, pm_peer_data_local_gatt_db_t * p_local_db);
+
+
+/**@brief Function for manually informing that the local database has changed.
+ *
+ * @details This causes a service changed notification to be sent to all bonded peers that
+ *          subscribe to it.
+ */
+void gcm_local_database_has_changed(void);
+
+/** @}
+  * @endcond
+ */
+
+#endif /* GATT_CACHE_MANAGER_H__ */