ble_error_t BlueNRGGattServer::write(GattAttribute::Handle_t attributeHandle, const uint8_t buffer[], uint16_t len, bool localOnly)
{
/* avoid compiler warnings about unused variables */
(void)localOnly;
// check that the len of the data to write are compatible with the characteristic
GattCharacteristic* characteristic = getCharacteristicFromHandle(attributeHandle);
if (!characteristic) {
PRINTF("characteristic not found\r\n");
return BLE_ERROR_INVALID_PARAM;
}
// if the attribute handle is the attribute handle of the characteristic value then
// write the value
if (attributeHandle == characteristic->getValueHandle()) {
// assert the len in input is correct for this characteristic
const GattAttribute& value_attribute = characteristic->getValueAttribute();
// reject write if the lenght exceed the maximum lenght of this attribute
if (value_attribute.getMaxLength() < len) {
PRINTF("invalid variable length: %u, max length is: %u\r\n", len, value_attribute.getMaxLength());
return BLE_ERROR_INVALID_PARAM;
}
// reject write if the attribute size is fixed and the lenght in input is different than the
// length of the attribute.
if (value_attribute.hasVariableLength() == false && value_attribute.getMaxLength() != len) {
PRINTF("invalid fixed length: %u, len should be %u\r\n", len, value_attribute.getMaxLength());
return BLE_ERROR_INVALID_PARAM;
}
tBleStatus ret;
uint16_t charHandle = characteristic->getValueHandle() - BlueNRGGattServer::CHAR_VALUE_HANDLE;
PRINTF("updating bleCharacteristic valueHandle=%u,\
corresponding serviceHandle=%u len=%d\n\r",
attributeHandle, bleCharHandleMap.find(charHandle)->second, len);
/*
* If notifications (or indications) are enabled on that characteristic, a notification (or indication)
* will be sent to the client after sending this command to the BlueNRG.
*/
ret = aci_gatt_update_char_value(bleCharHandleMap.find(charHandle)->second, charHandle, 0, len, buffer);
if (ret != BLE_STATUS_SUCCESS){
PRINTF("Error while updating characteristic (ret=0x%x).\n\r", ret);
switch (ret) {
case BLE_STATUS_INVALID_HANDLE:
case BLE_STATUS_INVALID_PARAMETER:
return BLE_ERROR_INVALID_PARAM;
default:
return BLE_STACK_BUSY;
}
}
return BLE_ERROR_NONE;
} else {
ble_error_t MaximGattServer::areUpdatesEnabled(Gap::Handle_t connectionHandle, const GattCharacteristic &characteristic, bool *enabledP)
{
if (connectionHandle != DM_CONN_ID_NONE) {
uint8_t idx;
for (idx = 0; idx < cccCnt; idx++) {
if (characteristic.getValueHandle() == cccHandles[idx]) {
uint16_t cccValue = AttsCccGet(connectionHandle, idx);
if (cccValue & ATT_CLIENT_CFG_NOTIFY) {
*enabledP = true;
} else {
*enabledP = false;
}
return BLE_ERROR_NONE;
}
}
}
return BLE_ERROR_PARAM_OUT_OF_RANGE;
}
ble_error_t nRF5xGattServer::areUpdatesEnabled(Gap::Handle_t connectionHandle, const GattCharacteristic &characteristic, bool *enabledP)
{
return areUpdatesEnabled(connectionHandle, characteristic.getValueHandle(), enabledP);
}