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xiaozhengsheng
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components/ble/ble_services/ble_lls/ble_lls.c
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components/ble/ble_services/ble_lls/ble_lls.c
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/**
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* Copyright (c) 2012 - 2020, Nordic Semiconductor ASA
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*
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without modification,
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* 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, this
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* list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form, except as embedded into a Nordic
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* Semiconductor ASA integrated circuit in a product or a software update for
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* such product, must reproduce the above copyright notice, this list of
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* conditions and the following disclaimer in the documentation and/or other
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* materials provided with the distribution.
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*
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* 3. Neither the name of Nordic Semiconductor ASA nor the names of its
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* contributors may be used to endorse or promote products derived from this
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* software without specific prior written permission.
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*
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* 4. This software, with or without modification, must only be used with a
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* Nordic Semiconductor ASA integrated circuit.
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*
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* 5. Any software provided in binary form under this license must not be reverse
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* engineered, decompiled, modified and/or disassembled.
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*
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* THIS SOFTWARE IS PROVIDED BY NORDIC SEMICONDUCTOR ASA "AS IS" AND ANY EXPRESS
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* OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY, NONINFRINGEMENT, AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL NORDIC SEMICONDUCTOR ASA 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 SUBSTITUTE
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* GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
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* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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*/
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/* Attention!
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* To maintain compliance with Nordic Semiconductor ASA's Bluetooth profile
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* qualification listings, this section of source code must not be modified.
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*/
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#include "sdk_common.h"
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#if NRF_MODULE_ENABLED(BLE_LLS)
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#include "ble_lls.h"
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#include <string.h>
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#include "ble_hci.h"
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#include "ble_srv_common.h"
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/**@brief Function for handling the Connect event.
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*
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* @param[in] p_lls Link Loss Service structure.
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* @param[in] p_ble_evt Event received from the BLE stack.
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*/
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static void on_connect(ble_lls_t * p_lls, ble_evt_t const * p_ble_evt)
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{
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// Link reconnected, notify application with a no_alert event
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ble_lls_evt_t evt;
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p_lls->conn_handle = p_ble_evt->evt.gap_evt.conn_handle;
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evt.evt_type = BLE_LLS_EVT_LINK_LOSS_ALERT;
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evt.params.alert_level = BLE_CHAR_ALERT_LEVEL_NO_ALERT;
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p_lls->evt_handler(p_lls, &evt);
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}
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/**@brief Function for handling the Disconnect event.
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*
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* @param[in] p_lls Link Loss Service structure.
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* @param[in] p_ble_evt Event received from the BLE stack.
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*/
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static void on_disconnect(ble_lls_t * p_lls, ble_evt_t const * p_ble_evt)
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{
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uint8_t reason = p_ble_evt->evt.gap_evt.params.disconnected.reason;
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if (reason == BLE_HCI_CONNECTION_TIMEOUT)
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{
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// Link loss detected, notify application
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uint32_t err_code;
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ble_lls_evt_t evt;
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evt.evt_type = BLE_LLS_EVT_LINK_LOSS_ALERT;
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err_code = ble_lls_alert_level_get(p_lls, &evt.params.alert_level);
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if (err_code == NRF_SUCCESS)
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{
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p_lls->evt_handler(p_lls, &evt);
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}
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else
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{
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if (p_lls->error_handler != NULL)
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{
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p_lls->error_handler(err_code);
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}
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}
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}
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}
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/**@brief Function for handling the Authentication Status event.
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*
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* @param[in] p_lls Link Loss Service structure.
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* @param[in] p_ble_evt Event received from the BLE stack.
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*/
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static void on_auth_status(ble_lls_t * p_lls, ble_evt_t const * p_ble_evt)
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{
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if (p_ble_evt->evt.gap_evt.params.auth_status.auth_status == BLE_GAP_SEC_STATUS_SUCCESS)
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{
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ble_lls_evt_t evt;
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evt.evt_type = BLE_LLS_EVT_LINK_LOSS_ALERT;
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evt.params.alert_level = BLE_CHAR_ALERT_LEVEL_NO_ALERT;
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p_lls->evt_handler(p_lls, &evt);
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}
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}
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void ble_lls_on_ble_evt(ble_evt_t const * p_ble_evt, void * p_context)
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{
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ble_lls_t * p_lls = (ble_lls_t *)p_context;
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if (p_lls == NULL || p_ble_evt == NULL)
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{
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return;
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}
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switch (p_ble_evt->header.evt_id)
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{
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case BLE_GAP_EVT_CONNECTED:
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on_connect(p_lls, p_ble_evt);
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break;
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case BLE_GAP_EVT_DISCONNECTED:
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on_disconnect(p_lls, p_ble_evt);
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break;
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case BLE_GAP_EVT_AUTH_STATUS:
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on_auth_status(p_lls, p_ble_evt);
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break;
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default:
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// No implementation needed.
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break;
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}
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}
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uint32_t ble_lls_init(ble_lls_t * p_lls, const ble_lls_init_t * p_lls_init)
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{
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uint32_t err_code;
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ble_uuid_t ble_uuid;
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ble_add_char_params_t add_char_params;
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if (p_lls == NULL || p_lls_init == NULL)
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{
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return NRF_ERROR_NULL;
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}
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if (p_lls_init->evt_handler == NULL)
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{
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return NRF_ERROR_INVALID_PARAM;
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}
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// Initialize service structure
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p_lls->evt_handler = p_lls_init->evt_handler;
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p_lls->error_handler = p_lls_init->error_handler;
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// Add service
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BLE_UUID_BLE_ASSIGN(ble_uuid, BLE_UUID_LINK_LOSS_SERVICE);
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err_code = sd_ble_gatts_service_add(BLE_GATTS_SRVC_TYPE_PRIMARY,
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&ble_uuid,
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&p_lls->service_handle);
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if (err_code != NRF_SUCCESS)
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{
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return err_code;
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}
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// Add alert level characteristic
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memset(&add_char_params, 0, sizeof(add_char_params));
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add_char_params.uuid = BLE_UUID_ALERT_LEVEL_CHAR;
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add_char_params.max_len = sizeof(uint8_t);
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add_char_params.char_props.read = 1;
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add_char_params.char_props.write = 1;
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add_char_params.write_access = p_lls_init->alert_level_wr_sec;
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add_char_params.read_access = p_lls_init->alert_level_rd_sec;
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add_char_params.init_len = sizeof(uint8_t);
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add_char_params.p_init_value = (uint8_t *) &(p_lls_init->initial_alert_level);
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return characteristic_add(p_lls->service_handle,
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&add_char_params,
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&p_lls->alert_level_handles);
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}
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uint32_t ble_lls_alert_level_get(ble_lls_t * p_lls, uint8_t * p_alert_level)
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{
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ble_gatts_value_t gatts_value;
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if (p_lls == NULL || p_alert_level == NULL)
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{
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return NRF_ERROR_NULL;
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}
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// Initialize value struct.
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memset(&gatts_value, 0, sizeof(gatts_value));
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gatts_value.len = sizeof(uint8_t);
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gatts_value.offset = 0;
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gatts_value.p_value = p_alert_level;
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return sd_ble_gatts_value_get(p_lls->conn_handle,
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p_lls->alert_level_handles.value_handle,
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&gatts_value);
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}
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#endif // NRF_MODULE_ENABLED(BLE_LLS)
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