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BLECharacteristicImp.cpp
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/*
* Copyright (c) 2016 Intel Corporation. All rights reserved.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*
*/
#include <errno.h>
#include "BLEAttribute.h"
#include "BLEServiceImp.h"
#include "BLECharacteristicImp.h"
#include "BLECallbacks.h"
#include "BLEUtils.h"
bt_uuid_16_t BLECharacteristicImp::_gatt_chrc_uuid = {BT_UUID_TYPE_16, BT_UUID_GATT_CHRC_VAL};
bt_uuid_16_t BLECharacteristicImp::_gatt_ccc_uuid = {BT_UUID_TYPE_16, BT_UUID_GATT_CCC_VAL};
volatile bool BLECharacteristicImp::_gattc_writing = false;
BLECharacteristicImp::BLECharacteristicImp(const bt_uuid_t* uuid,
unsigned char properties,
uint16_t handle,
const BLEDevice& bledevice):
BLEAttribute(uuid, BLETypeCharacteristic),
_value_length(0),
_value_buffer(NULL),
_value_updated(false),
_value_handle(handle),
_cccd_handle(0),
_attr_chrc_value(NULL),
_attr_cccd(NULL),
_subscribed(false),
_reading(false),
_ble_device()
{
_value_size = BLE_MAX_ATTR_DATA_LEN;// Set as MAX value. TODO: long read/write need to twist
_value = (unsigned char*)malloc(_value_size);
// TODO: Enable when max value is not set.
// if (_value_size > BLE_MAX_ATTR_DATA_LEN)
// {
// _value_buffer = (unsigned char*)malloc(_value_size);
// }
if (_value)
{
memset(_value, 0, _value_size);
}
else
{
errno = ENOMEM;
}
memset(&_ccc_cfg, 0, sizeof(_ccc_cfg));
memset(&_ccc_value, 0, sizeof(_ccc_value));
memset(&_gatt_chrc, 0, sizeof(_gatt_chrc));
memset(&_sub_params, 0, sizeof(_sub_params));
memset(&_discover_params, 0, sizeof(_discover_params));
_ccc_value.cfg = &_ccc_cfg;
_ccc_value.cfg_len = 1;
_ccc_value.user_data = (void *)this;
_ccc_value.cfg_changed = prfile_cccd_cfg_changed;
_ccc_value.value = 0;
if (BLERead & properties)
{
_gatt_chrc.properties |= BT_GATT_CHRC_READ;
}
if (BLEWrite & properties)
{
_gatt_chrc.properties |= BT_GATT_CHRC_WRITE;
}
if (BLEWriteWithoutResponse & properties)
{
_gatt_chrc.properties |= BT_GATT_CHRC_WRITE_WITHOUT_RESP;
}
if (BLENotify & properties)
{
_gatt_chrc.properties |= BT_GATT_CHRC_NOTIFY;
_sub_params.value |= BT_GATT_CCC_NOTIFY;
}
if (BLEIndicate & properties)
{
_gatt_chrc.properties |= BT_GATT_CHRC_INDICATE;
_sub_params.value |= BT_GATT_CCC_INDICATE;
}
_gatt_chrc.uuid = (bt_uuid_t*)this->bt_uuid();//&_characteristic_uuid;//this->uuid();
memset(_event_handlers, 0, sizeof(_event_handlers));
memset(_oldevent_handlers, 0, sizeof(_oldevent_handlers));
_sub_params.notify = profile_notify_process;
// Update BLE device object
_ble_device.setAddress(*bledevice.bt_le_address());
memset(&_descriptors_header, 0, sizeof(_descriptors_header));
}
BLECharacteristicImp::BLECharacteristicImp(BLECharacteristic& characteristic,
const BLEDevice& bledevice):
BLEAttribute(characteristic.uuid(), BLETypeCharacteristic),
_value_length(0),
_value_buffer(NULL),
_value_updated(false),
_value_handle(0),
_cccd_handle(0),
_attr_chrc_value(NULL),
_attr_cccd(NULL),
_subscribed(false),
_reading(false),
_ble_device()
{
unsigned char properties = characteristic._properties;
_value_size = characteristic._value_size;
_value = (unsigned char*)malloc(_value_size);
if (_value == NULL)
{
errno = ENOMEM;
}
if (_value_size > BLE_MAX_ATTR_DATA_LEN)
{
_value_buffer = (unsigned char*)malloc(_value_size);
}
memset(&_ccc_cfg, 0, sizeof(_ccc_cfg));
memset(&_ccc_value, 0, sizeof(_ccc_value));
memset(&_gatt_chrc, 0, sizeof(_gatt_chrc));
memset(&_sub_params, 0, sizeof(_sub_params));
memset(&_discover_params, 0, sizeof(_discover_params));
_ccc_value.cfg = &_ccc_cfg;
_ccc_value.cfg_len = 1;
_ccc_value.user_data = (void *)this;
_ccc_value.cfg_changed = prfile_cccd_cfg_changed;
_ccc_value.value = 0;
if (BLERead & properties)
{
_gatt_chrc.properties |= BT_GATT_CHRC_READ;
}
if (BLEWrite & properties)
{
_gatt_chrc.properties |= BT_GATT_CHRC_WRITE;
}
if (BLEWriteWithoutResponse & properties)
{
_gatt_chrc.properties |= BT_GATT_CHRC_WRITE_WITHOUT_RESP;
}
if (BLENotify & properties)
{
_gatt_chrc.properties |= BT_GATT_CHRC_NOTIFY;
_sub_params.value |= BT_GATT_CCC_NOTIFY;
}
if (BLEIndicate & properties)
{
_gatt_chrc.properties |= BT_GATT_CHRC_INDICATE;
_sub_params.value |= BT_GATT_CCC_INDICATE;
}
_gatt_chrc.uuid = (bt_uuid_t*)this->bt_uuid();//&_characteristic_uuid;//this->uuid();
memcpy(_event_handlers, characteristic._event_handlers, sizeof(_event_handlers));
memcpy(_oldevent_handlers, characteristic._oldevent_handlers, sizeof(_oldevent_handlers));
_sub_params.notify = profile_notify_process;
if (NULL != characteristic._value)
{
memcpy(_value, characteristic._value, _value_size);
_value_length = _value_size;
}
// Update BLE device object
_ble_device.setAddress(*bledevice.bt_le_address());
characteristic.setBLECharacteristicImp(this);
memset(&_descriptors_header, 0, sizeof(_descriptors_header));
}
BLECharacteristicImp::~BLECharacteristicImp()
{
releaseDescriptors();
if (_value)
{
free(_value);
_value = (unsigned char *)NULL;
}
if (_value_buffer)
{
free(_value_buffer);
_value_buffer = (unsigned char *)NULL;
}
}
unsigned char
BLECharacteristicImp::properties() const
{
return _gatt_chrc.properties;
}
bool BLECharacteristicImp::writeValue(const byte value[], int length)
{
int status;
bool retVal = false;
_setValue(value, length, 0);
// Address same is GATT server. Send notification if CCCD enabled
// Different is GATT client. Send write request
if (true == BLEUtils::isLocalBLE(_ble_device) &&
NULL != _attr_chrc_value)
{
// Notify for peripheral.
status = bt_gatt_notify(NULL, _attr_chrc_value, value, length, NULL);
// Sid. KW found status is always 0
// if (!status)
// {
retVal = true;
// }
}
//Not schedule write request for central
// The write request may failed.
// If user want to get latest set value. Call read and get the real value
return retVal;
}
bool BLECharacteristicImp::writeValue(const byte value[], int length, int offset)
{
int status;
bool retVal = false;
_setValue(value, length, offset);
// Address same is GATT server. Send notification if CCCD enabled
// Different is GATT client. Send write request
if (true == BLEUtils::isLocalBLE(_ble_device) &&
NULL != _attr_chrc_value)
{
// Notify for peripheral.
status = bt_gatt_notify(NULL, _attr_chrc_value, value, length, NULL);
// Sid. KW found status is always 0.
// if (!status)
// {
retVal = true;
// }
}
//Not schedule write request for central
// The write request may failed.
// If user want to get latest set value. Call read and get the real value
return retVal;
}
bool
BLECharacteristicImp::setValue(const unsigned char value[], uint16_t length)
{
_setValue(value, length, 0);
_value_updated = true;
if (BLEUtils::isLocalBLE(_ble_device) == true)
{
// GATT server
// Write request for GATT server
if (_event_handlers[BLEWritten])
{
BLECharacteristic chrcTmp(this, &_ble_device);
_event_handlers[BLEWritten](_ble_device, chrcTmp);
}
if (_oldevent_handlers[BLEWritten])
{
BLECharacteristic chrcTmp(this, &_ble_device);
BLECentral central(_ble_device);
_oldevent_handlers[BLEWritten](central, chrcTmp);
}
}
else
{
// GATT client
// Discovered attribute
// Read response/Notification/Indication for GATT client
if (_reading)
{
// Read response received. Not block the other reading.
_reading = false;
}
if (_event_handlers[BLEValueUpdated])
{
BLECharacteristic chrcTmp(this, &_ble_device);
_event_handlers[BLEValueUpdated](_ble_device, chrcTmp);
}
if (_oldevent_handlers[BLEValueUpdated])
{
BLECharacteristic chrcTmp(this, &_ble_device);
BLECentral central(_ble_device);
_oldevent_handlers[BLEValueUpdated](central, chrcTmp);
}
}
return true;
}
unsigned short
BLECharacteristicImp::valueSize() const
{
return _value_size;
}
const unsigned char*
BLECharacteristicImp::value() const
{
return _value;
}
unsigned short
BLECharacteristicImp::valueLength() const
{
return _value_length;
}
unsigned char
BLECharacteristicImp::operator[] (int offset) const
{
return _value[offset];
}
bool
BLECharacteristicImp::written()
{
bool written = false;
if (true == BLEUtils::isLocalBLE(_ble_device))
{
// GATT server. The characteristic on local device
written = _value_updated;
_value_updated = false;
}
return written;
}
bool BLECharacteristicImp::valueUpdated()
{
bool updated = false;
if (false == BLEUtils::isLocalBLE(_ble_device))
{
// GATT client. The characteristic on remote device.
updated = _value_updated;
_value_updated = false;
}
return updated;
}
bool
BLECharacteristicImp::subscribed()
{
if (false == BLEUtils::isLocalBLE(_ble_device))
{
// GATT client
return _subscribed;
}
else
{
// GATT server
return (_ccc_value.value & (BT_GATT_CCC_NOTIFY | BT_GATT_CCC_INDICATE));
}
}
bool BLECharacteristicImp::canNotify()
{
if (false == BLEUtils::isLocalBLE(_ble_device))
{
// GATT client can't subscribe
return false;
}
// GATT server
return (_ccc_value.value & BT_GATT_CCC_NOTIFY);
}
bool BLECharacteristicImp::canIndicate()
{
if (false == BLEUtils::isLocalBLE(_ble_device))
{
// GATT client can't subscribe
return false;
}
// GATT server
return (_ccc_value.value & BT_GATT_CCC_INDICATE);
}
bool BLECharacteristicImp::unsubscribe(void)
{
int retval = 0;
bt_conn_t* conn = NULL;
if (true == BLEUtils::isLocalBLE(_ble_device))
{
// GATT server can't subscribe
return false;
}
if (false == _subscribed)
{
return true;
}
_sub_params.value = 0;
if (0 == (_gatt_chrc.properties & (BT_GATT_CHRC_NOTIFY | BT_GATT_CHRC_INDICATE)))
{
// The characteristic not support the Notify and Indicate
return false;
}
conn = bt_conn_lookup_addr_le(_ble_device.bt_le_address());
if (NULL == conn)
{
return false;
}
bt_addr_le_copy(&_sub_params._peer, bt_conn_get_dst(conn));
_sub_params.ccc_handle = _cccd_handle;
_sub_params.value_handle = _value_handle;
// Enable CCCD to allow peripheral send Notification/Indication
retval = bt_gatt_unsubscribe(conn, &_sub_params);
bt_conn_unref(conn);
if (0 != retval)
{
return false;
}
_subscribed = false;
return true;
}
bool BLECharacteristicImp::subscribe(void)
{
int retval = 0;
bt_conn_t* conn = NULL;
if (true == BLEUtils::isLocalBLE(_ble_device))
{
// GATT server can't subscribe
return false;
}
if (_gatt_chrc.properties & BT_GATT_CHRC_NOTIFY)
{
_sub_params.value |= BT_GATT_CCC_NOTIFY;
}
if (_gatt_chrc.properties & BT_GATT_CHRC_INDICATE)
{
_sub_params.value |= BT_GATT_CCC_INDICATE;
}
if (_sub_params.value == 0)
{
return false;
}
conn = bt_conn_lookup_addr_le(_ble_device.bt_le_address());
if (NULL == conn)
{
return false;
}
bt_addr_le_copy(&_sub_params._peer, bt_conn_get_dst(conn));
_sub_params.ccc_handle = _cccd_handle;
_sub_params.value_handle = _value_handle;
// Enable CCCD to allow peripheral send Notification/Indication
retval = bt_gatt_subscribe(conn, &_sub_params);
bt_conn_unref(conn);
if (0 == retval)
{
_subscribed = true;
}
return _subscribed;
}
void
BLECharacteristicImp::setEventHandler(BLECharacteristicEvent event, BLECharacteristicEventHandler callback)
{
noInterrupts();
if (event < BLECharacteristicEventLast) {
_event_handlers[event] = callback;
}
interrupts();
}
void
BLECharacteristicImp::setEventHandler(BLECharacteristicEvent event, BLECharacteristicEventHandlerOld callback)
{
noInterrupts();
if (event < BLECharacteristicEventLast) {
_oldevent_handlers[event] = callback;
}
interrupts();
}
void
BLECharacteristicImp::setHandle(uint16_t handle)
{
// GATT client
_value_handle = handle;
}
void
BLECharacteristicImp::setCCCDHandle(uint16_t handle)
{
// GATT client
_cccd_handle = handle;
}
uint16_t
BLECharacteristicImp::valueHandle()
{
uint16_t handle = 0;
if (NULL != _attr_chrc_value)
{
//GATT server
handle = _attr_chrc_value->handle;
}
else
{
// GATT client
handle = _value_handle;
}
return handle;
}
BLEDescriptorImp* BLECharacteristicImp::descriptor(uint16_t handle)
{
BLEDescriptorImp* descriptorImp = NULL;
BLEDescriptorNodePtr node = link_node_get_first(&_descriptors_header);
while (NULL != node)
{
descriptorImp = node->value;
if (handle == descriptorImp->valueHandle())
{
break;
}
node = node->next;
}
if (NULL == node)
{
descriptorImp = NULL;
}
return descriptorImp;
}
void
BLECharacteristicImp::_setValue(const uint8_t value[], uint16_t length, uint16_t offset)
{
if (length + offset > _value_size)
{
if (_value_size > offset)
{
uint16_t temp_len = _value_size - offset;
if (length > temp_len)
{
length = temp_len;
}
}
else
{
return;
}
}
memcpy(_value + offset, value, length);
_value_length = length;
}
_bt_gatt_ccc_t* BLECharacteristicImp::getCccCfg(void)
{
return &_ccc_value;
}
bt_gatt_chrc_t* BLECharacteristicImp::getCharacteristicAttValue(void)
{
return &_gatt_chrc;
}
uint8_t BLECharacteristicImp::getPermission(void)
{
uint8_t perm = 0;
if (_gatt_chrc.properties & BT_GATT_CHRC_READ)
{
perm |= BT_GATT_PERM_READ;
}
if (_gatt_chrc.properties & (BT_GATT_CHRC_WRITE | BT_GATT_CHRC_WRITE_WITHOUT_RESP))
{
perm |= BT_GATT_PERM_WRITE;
}
return perm;
}
bt_uuid_t* BLECharacteristicImp::getCharacteristicAttributeUuid(void)
{
return (bt_uuid_t*) &_gatt_chrc_uuid;
}
bt_uuid_t* BLECharacteristicImp::getClientCharacteristicConfigUuid(void)
{
return (bt_uuid_t*) &_gatt_ccc_uuid;
}
bool BLECharacteristicImp::read(bool blocked)
{
int retval = 0;
bool ret_bool = false;
bt_conn_t* conn = NULL;
if (true == BLEUtils::isLocalBLE(_ble_device))
{
// GATT server can't write
return false;
}
if (_reading)
{
// Already in reading state
return false;
}
_read_params.func = profile_read_rsp_process;
_read_params.handle_count = 1;
_read_params.single.handle = _value_handle;
_read_params.single.offset = 0;
if (0 == _read_params.single.handle)
{
// Discover not complete
return false;
}
conn = bt_conn_lookup_addr_le(_ble_device.bt_le_address());
if (NULL == conn)
{
return false;
}
// Send read request
retval = bt_gatt_read(conn, &_read_params);
if (0 == retval)
{
_reading = true;
ret_bool = true;
// Block the call
if (blocked == true)
{
while (_reading == true && ret_bool)
{
delay(5);
ret_bool = _ble_device.connected();
}
}
}
bt_conn_unref(conn);
return ret_bool;
}
void BLECharacteristicImp::writeResponseReceived(struct bt_conn *conn,
uint8_t err,
const void *data)
{
_gattc_writing = false;
}
bool BLECharacteristicImp::write(const unsigned char value[],
uint16_t length)
{
int retval = 0;
bt_conn_t* conn = NULL;
if (true == BLEUtils::isLocalBLE(_ble_device) || true == _gattc_writing)
{
// GATT server can't write
return false;
}
conn = bt_conn_lookup_addr_le(_ble_device.bt_le_address());
if (NULL == conn)
{
return false;
}
// Send write request
if (_gatt_chrc.properties & BT_GATT_CHRC_WRITE)
{
_gattc_writing = true;
retval = bt_gatt_write(conn,
_value_handle,
0,
value,
length,
ble_on_write_no_rsp_complete);
while (_gattc_writing)
{
delay(2);
}
} else if (_gatt_chrc.properties & BT_GATT_CHRC_WRITE_WITHOUT_RESP)
{
retval = bt_gatt_write_without_response(conn,
_value_handle,
value,
length,
false);
}
bt_conn_unref(conn);
return (0 == retval);
}
void BLECharacteristicImp::setBuffer(const uint8_t value[],
uint16_t length,
uint16_t offset)
{
if ((length + offset > _value_size) ||
((unsigned char *)NULL == _value_buffer)) {
// Ignore the data
return;
}
memcpy(_value_buffer + offset, value, length);
}
void BLECharacteristicImp::syncupBuffer2Value()
{
setValue(_value_buffer, _value_size);
}
void BLECharacteristicImp::discardBuffer()
{
if(_value_buffer)
memcpy(_value_buffer, _value, _value_size);
}
bool BLECharacteristicImp::longCharacteristic()
{
return (_value_size > BLE_MAX_ATTR_DATA_LEN);
}
int BLECharacteristicImp::updateProfile(bt_gatt_attr_t *attr_start, int& index)
{
bt_gatt_attr_t *start = attr_start;
int base_index = index;
int offset = 0;
int counter = 0;
// Characteristic declare
memset(start, 0, sizeof(bt_gatt_attr_t));
start->uuid = getCharacteristicAttributeUuid();
start->perm = BT_GATT_PERM_READ;
start->read = bt_gatt_attr_read_chrc;
start->user_data = this->getCharacteristicAttValue();
pr_info(LOG_MODULE_BLE, "chrc-%p, uuid type-%d", start, start->uuid->type);
start++;
index++;
counter++;
// Descriptor
memset(start, 0, sizeof(bt_gatt_attr_t));
start->uuid = (bt_uuid_t *)bt_uuid();
start->perm = this->getPermission();
start->user_data = (void*)((BLEAttribute*)this);
start->read = profile_read_process;
if (this->longCharacteristic() == false)
{
// Normal characteristic MAX. 20
start->write = profile_write_process;
}
else
{
// Long characteristic. MAX. 512
start->write = profile_longwrite_process;
start->flush = profile_longflush_process;
}
_attr_chrc_value = start;
pr_debug(LOG_MODULE_BLE, "chrcdescripor-%p, chimp-%p type-%d", start, this, this->type());
start++;
index++;
counter++;
if (0 != (_gatt_chrc.properties & (BT_GATT_CHRC_NOTIFY | BT_GATT_CHRC_INDICATE)))
{
// Descriptor
memset(start, 0, sizeof(bt_gatt_attr_t));
start->uuid = this->getClientCharacteristicConfigUuid();
start->perm = BT_GATT_PERM_READ | BT_GATT_PERM_WRITE;
start->read = bt_gatt_attr_read_ccc;
start->write = bt_gatt_attr_write_ccc;
start->user_data = this->getCccCfg();
pr_info(LOG_MODULE_BLE, "cccd-%p", start);
start++;
index++;
counter++;
}
BLEDescriptorNodePtr node = _descriptors_header.next;
while (NULL != node)
{
BLEDescriptorImp *descriptorImp = node->value;
start = attr_start + index - base_index;
offset = descriptorImp->updateProfile(start, index);
counter += offset;
node = node->next;
}
pr_debug(LOG_MODULE_BLE, "%s:type-%d", __FUNCTION__, this->type());
return counter;
}
int BLECharacteristicImp::addDescriptor(BLEDescriptor& descriptor)
{
BLEDescriptorImp* descriptorImp = descrptor(descriptor.uuid());
if (NULL != descriptorImp)
{
return BLE_STATUS_SUCCESS;
}
descriptorImp = new BLEDescriptorImp(_ble_device, descriptor);
pr_debug(LOG_MODULE_BLE, "%s-%d",__FUNCTION__, __LINE__);
if (NULL == descriptorImp)
{
return BLE_STATUS_NO_MEMORY;
}
pr_debug(LOG_MODULE_BLE, "%s-%d",__FUNCTION__, __LINE__);
BLEDescriptorNodePtr node = link_node_create(descriptorImp);
if (NULL == node)
{
delete descriptorImp;
return BLE_STATUS_NO_MEMORY;
}
link_node_insert_last(&_descriptors_header, node);
pr_debug(LOG_MODULE_BLE, "%s-%d",__FUNCTION__, __LINE__);
return BLE_STATUS_SUCCESS;
}
int BLECharacteristicImp::addDescriptor(const bt_uuid_t* uuid,
unsigned char property,
uint16_t handle)
{
BLEDescriptorImp* descriptorImp = descrptor(uuid);
if (NULL != descriptorImp)
{
return BLE_STATUS_SUCCESS;
}
descriptorImp = new BLEDescriptorImp(uuid, property, handle, _ble_device);
pr_debug(LOG_MODULE_BLE, "%s-%d",__FUNCTION__, __LINE__);
if (NULL == descriptorImp)
{
return BLE_STATUS_NO_MEMORY;
}
BLEDescriptorNodePtr node = link_node_create(descriptorImp);
if (NULL == node)
{
delete descriptorImp;
return BLE_STATUS_NO_MEMORY;
}
link_node_insert_last(&_descriptors_header, node);
pr_debug(LOG_MODULE_BLE, "%s-%d",__FUNCTION__, __LINE__);
return BLE_STATUS_SUCCESS;
}
BLEDescriptorImp* BLECharacteristicImp::descrptor(const bt_uuid_t* uuid)
{
BLEDescriptorImp* descriptorImp = NULL;
BLEDescriptorNodePtr node = link_node_get_first(&_descriptors_header);
while (NULL != node)
{
descriptorImp = node->value;
if (true == descriptorImp->compareUuid(uuid))
{
break;
}
node = node->next;
}
if (NULL == node)
{
descriptorImp = NULL;
}
return descriptorImp;
}
BLEDescriptorImp* BLECharacteristicImp::descrptor(const char* uuid)
{
bt_uuid_128_t uuid_tmp;
BLEUtils::uuidString2BT(uuid, (bt_uuid_t *)&uuid_tmp);
return descrptor((const bt_uuid_t *)&uuid_tmp);
}
BLEDescriptorImp* BLECharacteristicImp::descrptor(int index)
{
BLEDescriptorImp* descriptorImp = NULL;
BLEDescriptorNodePtr node = link_node_get_first(&_descriptors_header);
while (NULL != node)
{
if (0 >= index)
{
descriptorImp = node->value;
break;
}
index--;
node = node->next;
}
return descriptorImp;
}
void BLECharacteristicImp::releaseDescriptors()
{
BLEDescriptorNodePtr node = link_node_get_first(&_descriptors_header);
while (NULL != node)
{
BLEDescriptorImp* descriptorImp = node->value;
delete descriptorImp;
link_node_remove_first(&_descriptors_header);
node = link_node_get_first(&_descriptors_header);
}
}
int BLECharacteristicImp::getAttributeCount()
{
int counter = link_list_size(&_descriptors_header) + 2; // Declaration and descriptor
// Notification/Indecation
if (_gatt_chrc.properties & (BT_GATT_CHRC_NOTIFY | BT_GATT_CHRC_INDICATE))
{
counter++;
}
return counter;
}
int BLECharacteristicImp::descriptorCount() const
{
int counter = link_list_size(&_descriptors_header);
return counter;
}
bool BLECharacteristicImp::discoverAttributes(BLEDevice* device)
{
int err;
bt_conn_t* conn;
bt_gatt_discover_params_t* temp = NULL;
const bt_uuid_t* service_uuid = bt_uuid();
if (service_uuid->type == BT_UUID_TYPE_16)
{
uint16_t uuid_tmp ;//= ((bt_uuid_16_t*)service_uuid)->val;
memcpy(&uuid_tmp, &((bt_uuid_16_t*)service_uuid)->val, sizeof(uuid_tmp));
if (BT_UUID_GAP_VAL == uuid_tmp ||
BT_UUID_GATT_VAL == uuid_tmp)
{
return false;
}
}
conn = bt_conn_lookup_addr_le(device->bt_le_address());
if (NULL == conn)
{
// Link lost
pr_debug(LOG_MODULE_BLE, "Can't find connection\n");
return false;
}
temp = &_discover_params;
temp->start_handle = _value_handle + 1;
temp->end_handle = _value_handle + 20; // TODO: the max descriptor is not more than 20
temp->uuid = NULL;
temp->type = BT_GATT_DISCOVER_DESCRIPTOR;