import frame_handler import helpers import data_frame_factory class PingFrameHandler(frame_handler.FrameHandler): def is_frame_for_me(self): call_with_ssid = self.config['STATION']['mycall'] + "-" + str(self.config['STATION']['myssid']) valid, mycallsign = helpers.check_callsign( call_with_ssid, self.details["frame"]["destination_crc"], self.config['STATION']['ssid_list']) if not valid: ft = self.details['frame']['frame_type'] self.logger.info(f"[Modem] {ft} received but not for us.") return valid def should_respond(self): return self.is_frame_for_me() def follow_protocol(self): if not self.should_respond(): return self.logger.debug( f"[Modem] Responding to request from [{self.details['frame']['origin']}]", snr=self.details['snr'], ) self.send_ack() def send_ack(self): factory = data_frame_factory.DataFrameFactory(self.config) ping_ack_frame = factory.build_ping_ack( self.details['frame']['origin_crc'], self.details['snr'] ) self.transmit(ping_ack_frame)