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/**
* Copyright (c) 2016 - 2017, 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 form under this license must not be reverse
* engineered, decompiled, modified and/or disassembled.
*
* THIS SOFTWARE IS PROVIDED BY NORDIC SEMICONDUCTOR ASA "AS IS" AND ANY EXPRESS
* OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY, NONINFRINGEMENT, AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL NORDIC SEMICONDUCTOR ASA 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.
*
*/
#include "sdk_config.h"
#if NRF_BLE_GATT_ENABLED
#include "nrf_ble_gatt.h"
#include "ble_srv_common.h"
#include "sdk_common.h"
#include "app_error.h"
#include "sdk_macros.h"
#define NRF_LOG_MODULE_NAME "BLE_GATT"
#include "nrf_log.h"
#if (NRF_SD_BLE_API_VERSION == 3)
/**@brief Handle a connected event.
*
* @param[in] p_gatt GATT structure.
* @param[in] p_ble_evt Event received from the BLE stack.
*/
void on_connected_evt(nrf_ble_gatt_t * p_gatt, ble_evt_t * p_ble_evt)
{
ret_code_t err_code;
uint16_t conn_handle = p_ble_evt->evt.common_evt.conn_handle;
if(p_ble_evt->evt.gap_evt.params.connected.role == BLE_GAP_ROLE_PERIPH)
{
p_gatt->links[conn_handle].att_mtu_desired = p_gatt->att_mtu_desired_periph;
}
if (p_ble_evt->evt.gap_evt.params.connected.role == BLE_GAP_ROLE_CENTRAL)
{
p_gatt->links[conn_handle].att_mtu_desired = p_gatt->att_mtu_desired_central;
}
if (p_gatt->links[conn_handle].att_mtu_desired > GATT_MTU_SIZE_DEFAULT)
{
err_code = sd_ble_gattc_exchange_mtu_request(conn_handle,
p_gatt->links[conn_handle].att_mtu_desired);
if (err_code == NRF_ERROR_BUSY)
{
NRF_LOG_DEBUG("exchange_mtu_request for conn_handle %d returned busy, will retry\r\n",
conn_handle);
p_gatt->links[conn_handle].is_request_pending = true;
}
if (err_code == NRF_SUCCESS)
{
NRF_LOG_INFO("request ATT MTU %d for conn_handle %d \r\n",
p_gatt->links[conn_handle].att_mtu_desired, conn_handle);
}
}
}
#endif //(NRF_SD_BLE_API_VERSION == 3)
#if (NRF_SD_BLE_API_VERSION == 3)
/**@brief Handle a EXCHANGE_MTU_RSP event.
*
* @param[in] p_gatt GATT structure.
* @param[in] p_ble_evt Event received from the BLE stack.
*/
void on_exchange_mtu_rsp_evt(nrf_ble_gatt_t * p_gatt, ble_evt_t * p_ble_evt)
{
uint16_t conn_handle = p_ble_evt->evt.common_evt.conn_handle;
uint16_t server_rx_mtu = p_ble_evt->evt.gattc_evt.params.exchange_mtu_rsp.server_rx_mtu;
p_gatt->links[conn_handle].att_mtu_effective = MIN(server_rx_mtu,
p_gatt->links[conn_handle].att_mtu_desired);
if (p_gatt->links[conn_handle].att_mtu_effective < GATT_MTU_SIZE_DEFAULT)
{
p_gatt->links[conn_handle].att_mtu_effective = GATT_MTU_SIZE_DEFAULT;
}
NRF_LOG_INFO("EXCHANGE_MTU_RSP effective ATT MTU is %d for conn_handle %d \r\n",
p_gatt->links[conn_handle].att_mtu_effective, conn_handle);
/*trigger an event indicating that the ATT MTU size has changed to m_effective_att_mtu*/
if(p_gatt->evt_handler != NULL)
{
nrf_ble_gatt_evt_t evt;
evt.conn_handle = conn_handle;
evt.att_mtu_effective = p_gatt->links[conn_handle].att_mtu_effective;
p_gatt->evt_handler(p_gatt, &evt);
}
p_gatt->links[conn_handle].is_request_pending = false;
}
#endif //(NRF_SD_BLE_API_VERSION == 3)
#if (NRF_SD_BLE_API_VERSION == 3)
/**@brief Handle a EXCHANGE_MTU_REQUEST event.
*
* @param[in] p_gatt GATT structure.
* @param[in] p_ble_evt Event received from the BLE stack.
*/
void on_exchange_mtu_request_evt(nrf_ble_gatt_t * p_gatt, ble_evt_t * p_ble_evt)
{
ret_code_t err_code;
uint16_t conn_handle = p_ble_evt->evt.common_evt.conn_handle;
uint16_t clt_mtu = p_ble_evt->evt.gatts_evt.params.exchange_mtu_request.client_rx_mtu;
if (clt_mtu < GATT_MTU_SIZE_DEFAULT)
{
clt_mtu = GATT_MTU_SIZE_DEFAULT;
}
err_code = sd_ble_gatts_exchange_mtu_reply(p_ble_evt->evt.gatts_evt.conn_handle,
p_gatt->links[conn_handle].att_mtu_desired);
APP_ERROR_CHECK(err_code);
p_gatt->links[conn_handle].att_mtu_effective = MIN(clt_mtu,
p_gatt->links[conn_handle].att_mtu_desired);
NRF_LOG_INFO("EXCHANGE_MTU_REQUEST effective ATT MTU is %d for conn_handle %d \r\n",
p_gatt->links[conn_handle].att_mtu_desired, conn_handle);
/*trigger an event indicating that the ATT MTU size has changed to m_effective_att_mtu*/
if(p_gatt->evt_handler != NULL)
{
nrf_ble_gatt_evt_t evt;
evt.conn_handle = conn_handle;
evt.att_mtu_effective = p_gatt->links[conn_handle].att_mtu_effective;
p_gatt->evt_handler(p_gatt, &evt);
}
p_gatt->links[conn_handle].is_request_pending = false;
}
#endif //(NRF_SD_BLE_API_VERSION == 3)
#if (NRF_SD_BLE_API_VERSION == 3)
/**@brief Handle a DATA_LENGTH_CHANGED event.
*
* @param[in] p_gatt GATT structure.
* @param[in] p_ble_evt Event received from the BLE stack.
*/
void on_data_length_changed_evt(nrf_ble_gatt_t * p_gatt, ble_evt_t * p_ble_evt)
{
uint16_t conn_handle = p_ble_evt->evt.common_evt.conn_handle;
NRF_LOG_INFO("Data Length Extended (DLE) for conn_handle %d \r\n", conn_handle);
NRF_LOG_DEBUG("max_rx_octets %d \r\n",
p_ble_evt->evt.common_evt.params.data_length_changed.max_rx_octets);
NRF_LOG_DEBUG("max_rx_time %d \r\n",
p_ble_evt->evt.common_evt.params.data_length_changed.max_rx_time);
NRF_LOG_DEBUG("max_tx_octets %d \r\n",
p_ble_evt->evt.common_evt.params.data_length_changed.max_tx_octets);
NRF_LOG_DEBUG("max_tx_time %d \r\n",
p_ble_evt->evt.common_evt.params.data_length_changed.max_tx_time);
}
#endif //(NRF_SD_BLE_API_VERSION == 3)
ret_code_t nrf_ble_gatt_init(nrf_ble_gatt_t * p_gatt, nrf_ble_gatt_evt_handler_t evt_handler)
{
#if (NRF_SD_BLE_API_VERSION == 3)
VERIFY_PARAM_NOT_NULL(p_gatt);
p_gatt->att_mtu_desired_periph = NRF_BLE_GATT_MAX_MTU_SIZE;
p_gatt->att_mtu_desired_central = NRF_BLE_GATT_MAX_MTU_SIZE;
for (uint8_t i = 0; i < NRF_BLE_GATT_LINK_COUNT; i++)
{
p_gatt->links[i].att_mtu_desired = NRF_BLE_GATT_MAX_MTU_SIZE;
p_gatt->links[i].att_mtu_effective = GATT_MTU_SIZE_DEFAULT;
p_gatt->links[i].is_request_pending = false;
}
p_gatt->evt_handler = evt_handler;
#endif
return NRF_SUCCESS;
}
ret_code_t nrf_ble_gatt_att_mtu_periph_set(nrf_ble_gatt_t * p_gatt, uint16_t desired_mtu)
{
#if (NRF_SD_BLE_API_VERSION == 3)
VERIFY_PARAM_NOT_NULL(p_gatt);
if ((desired_mtu < GATT_MTU_SIZE_DEFAULT)
||(desired_mtu > NRF_BLE_GATT_MAX_MTU_SIZE))
{
return NRF_ERROR_INVALID_PARAM;
}
p_gatt->att_mtu_desired_periph = desired_mtu;
return NRF_SUCCESS;
#endif
#if (NRF_SD_BLE_API_VERSION == 2)
return NRF_ERROR_NOT_SUPPORTED;
#endif
}
ret_code_t nrf_ble_gatt_att_mtu_central_set(nrf_ble_gatt_t * p_gatt, uint16_t desired_mtu)
{
#if (NRF_SD_BLE_API_VERSION == 3)
VERIFY_PARAM_NOT_NULL(p_gatt);
if ((desired_mtu < GATT_MTU_SIZE_DEFAULT)
||(desired_mtu > NRF_BLE_GATT_MAX_MTU_SIZE))
{
return NRF_ERROR_INVALID_PARAM;
}
p_gatt->att_mtu_desired_central = desired_mtu;
return NRF_SUCCESS;
#endif
#if (NRF_SD_BLE_API_VERSION == 2)
return NRF_ERROR_NOT_SUPPORTED;
#endif
}
uint16_t nrf_ble_gatt_eff_mtu_get(nrf_ble_gatt_t * p_gatt, uint16_t conn_handle)
{
#if (NRF_SD_BLE_API_VERSION == 3)
if ((p_gatt == NULL)||(conn_handle >= NRF_BLE_GATT_LINK_COUNT))
{
return 0;
}
return p_gatt->links[conn_handle].att_mtu_effective;
#endif
#if (NRF_SD_BLE_API_VERSION == 2)
return GATT_MTU_SIZE_DEFAULT;
#endif
}
void nrf_ble_gatt_on_ble_evt(nrf_ble_gatt_t * p_gatt, ble_evt_t * p_ble_evt)
{
#if (NRF_SD_BLE_API_VERSION == 3)
uint16_t conn_handle = p_ble_evt->evt.common_evt.conn_handle;
if (conn_handle >= NRF_BLE_GATT_LINK_COUNT)
{
return;
}
switch (p_ble_evt->header.evt_id)
{
case BLE_GAP_EVT_CONNECTED:
on_connected_evt(p_gatt, p_ble_evt);
break; // BLE_GAP_EVT_CONNECTED
case BLE_GATTC_EVT_EXCHANGE_MTU_RSP:
on_exchange_mtu_rsp_evt(p_gatt, p_ble_evt);
break; // BLE_GATTC_EVT_EXCHANGE_MTU_RSP
case BLE_GATTS_EVT_EXCHANGE_MTU_REQUEST:
on_exchange_mtu_request_evt(p_gatt, p_ble_evt);
break; // BLE_GATTS_EVT_EXCHANGE_MTU_REQUEST
case BLE_EVT_DATA_LENGTH_CHANGED :
on_data_length_changed_evt(p_gatt, p_ble_evt);
break; // BLE_EVT_DATA_LENGTH_CHANGED
default:
break;
}
if (p_gatt->links[conn_handle].is_request_pending)
{
ret_code_t err_code;
p_gatt->links[conn_handle].is_request_pending = false;
err_code = sd_ble_gattc_exchange_mtu_request(conn_handle,
p_gatt->links[conn_handle].att_mtu_desired);
if (err_code == NRF_ERROR_BUSY)
{
p_gatt->links[conn_handle].is_request_pending = true;
}
if (err_code == NRF_SUCCESS)
{
NRF_LOG_INFO("sent pending request ATT MTU %d for conn_handle %d \r\n",
p_gatt->links[conn_handle].att_mtu_desired, conn_handle);
}
}
#endif //(NRF_SD_BLE_API_VERSION == 3)
}
#endif //NRF_BLE_GATT_ENABLED