def close_secure_channel(self):
"""
close secure channel. It seems to trigger a shutdown of socket
in most servers, so be prepare to reconnect.
OPC UA specs Part 6, 7.1.4 say that Server does not send a CloseSecureChannel response and should just close socket
"""
self.logger.info("close_secure_channel")
request = ua.CloseSecureChannelRequest()
future = self._send_request(request, message_type=ua.MessageType.SecureClose)
with self._lock:
# don't expect any more answers
future.cancel()
self._callbackmap.clear()
def close_secure_channel(self):
"""
close secure channel. It seems to trigger a shutdown of socket in most servers, so be prepare to reconnect.
OPC UA specs Part 6, 7.1.4 say that Server does not send a CloseSecureChannel response and should just close
socket
"""
self.logger.info("close_secure_channel")
request = ua.CloseSecureChannelRequest()
try:
future = self._send_request(request, message_type=ua.MessageType.SecureClose)
with self._lock:
# some servers send a response here, most do not ... so we ignore
future.cancel()
except (socket.error, OSError) as exc:
if exc.errno in (errno.ENOTCONN, errno.EBADF):
# Socket is closed, so can't send CloseSecureChannelRequest.
self.logger.warning("close_secure_channel() failed: socket already closed")
else:
raise
