mirror of https://github.com/DJ2LS/FreeDATA.git
49 lines
1.9 KiB
Python
49 lines
1.9 KiB
Python
from freedata_server import frame_handler
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from freedata_server import data_frame_factory
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class PingFrameHandler(frame_handler.FrameHandler):
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"""Handles received PING frames.
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This class processes received PING frames, sends acknowledgements, and
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checks for queued messages to be sent based on configuration.
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"""
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# def is_frame_for_me(self):
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# call_with_ssid = self.config['STATION']['mycall'] + "-" + str(self.config['STATION']['myssid'])
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# valid, mycallsign = helpers.check_callsign(
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# call_with_ssid,
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# self.details["frame"]["destination_crc"],
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# self.config['STATION']['ssid_list'])
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# if not valid:
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# ft = self.details['frame']['frame_type']
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# self.logger.info(f"[Modem] {ft} received but not for us.")
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# return valid
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def follow_protocol(self):
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"""Processes the received PING frame.
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This method checks if the frame is for the current station and if
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the modem is not busy with ARQ. If both conditions are met, it sends
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a PING acknowledgement and checks for queued messages to send.
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"""
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if not bool(self.is_frame_for_me() and not self.ctx.state_manager.getARQ()):
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return
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self.logger.debug(
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f"[Modem] Responding to request from [{self.details['frame']['origin']}]",
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snr=self.details["snr"],
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)
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self.send_ack()
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self.check_for_queued_message()
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def send_ack(self):
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"""Sends a PING acknowledgement frame.
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This method builds a PING acknowledgement frame using the received
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frame's origin CRC and SNR, and transmits it using the modem.
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"""
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factory = data_frame_factory.DataFrameFactory(self.ctx)
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ping_ack_frame = factory.build_ping_ack(self.details["frame"]["origin_crc"], self.details["snr"])
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self.transmit(ping_ack_frame)
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