def _on_write_auth_request(self, write_event):
"""
:type write_event: nrf_events.GattsEvtWrite
"""
if write_event.write_op in [nrf_events.BLEGattsWriteOperation.exec_write_req_cancel,
nrf_events.BLEGattsWriteOperation.exec_write_req_now]:
self._execute_queued_write(write_event.write_op)
# Reply should already be handled in database since this can span multiple characteristics and services
return
if not self._handle_in_characteristic(write_event.attribute_handle):
# Handle is not for this characteristic, do nothing
return
# Build out the reply
params = nrf_types.BLEGattsAuthorizeParams(nrf_types.BLEGattStatusCode.success, True,
write_event.offset, write_event.data)
reply = nrf_types.BLEGattsRwAuthorizeReplyParams(write=params)
# Check that the write length is valid
if write_event.offset + len(write_event.data) > self._properties.max_len:
params.gatt_status = nrf_types.BLEGattStatusCode.invalid_att_val_length
self.ble_device.ble_driver.ble_gatts_rw_authorize_reply(write_event.conn_handle, reply)
else:
# Send reply before processing write, in case user sets data in gatts_write handler
try:
self.ble_device.ble_driver.ble_gatts_rw_authorize_reply(write_event.conn_handle, reply)
except Exception as e:
pass
if write_event.write_op == nrf_events.BLEGattsWriteOperation.prep_write_req:
self._write_queued = True
self._queued_write_chunks.append(self._QueuedChunk(write_event.offset, write_event.data))
elif write_event.write_op in [nrf_events.BLEGattsWriteOperation.write_req,
nrf_types.BLEGattsWriteOperation.write_cmd]:
self._on_gatts_write(None, write_event)
def _on_rw_auth_request(self, driver, event):
"""
:type event: nrf_events.GattsEvtReadWriteAuthorizeRequest
"""
if not event.write:
return
# execute writes can span multiple services and characteristics. Should only reply at the top-level here
if event.write.write_op not in [nrf_events.BLEGattsWriteOperation.exec_write_req_now,
nrf_events.BLEGattsWriteOperation.exec_write_req_cancel]:
return
params = nrf_types.BLEGattsAuthorizeParams(nrf_types.BLEGattStatusCode.success, False)
reply = nrf_types.BLEGattsRwAuthorizeReplyParams(write=params)
self.ble_device.ble_driver.ble_gatts_rw_authorize_reply(event.conn_handle, reply)
def _on_read_auth_request(self, read_event):
"""
:type read_event: nrf_events.GattsEvtRead
"""
if not self._handle_in_characteristic(read_event.attribute_handle):
# Don't care about handles outside of this characteristic
return
params = nrf_types.BLEGattsAuthorizeParams(nrf_types.BLEGattStatusCode.success, False, read_event.offset)
reply = nrf_types.BLEGattsRwAuthorizeReplyParams(read=params)
if read_event.offset > len(self.value):
params.gatt_status = nrf_types.BLEGattStatusCode.invalid_offset
else:
self._read_in_process = True
# If the client is reading from the beginning, notify handlers in case an update needs to be made
if read_event.offset == 0:
self._on_read.notify(self)
self._read_in_process = False
self.ble_device.ble_driver.ble_gatts_rw_authorize_reply(read_event.conn_handle, reply)