mirror of
https://github.com/DJ2LS/FreeDATA
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58 lines
2.1 KiB
Python
58 lines
2.1 KiB
Python
from queue import Queue
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import frame_handler
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from event_manager import EventManager
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from state_manager import StateManager
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from modem_frametypes import FRAME_TYPE as FR
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from arq_session_irs import ARQSessionIRS
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from arq_session_iss import ARQSessionISS
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class ARQFrameHandler(frame_handler.FrameHandler):
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def follow_protocol(self):
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if not self.should_respond():
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return
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frame = self.details['frame']
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session_id = frame['session_id']
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snr = self.details["snr"]
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frequency_offset = self.details["frequency_offset"]
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if frame['frame_type_int'] == FR.ARQ_SESSION_OPEN.value:
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# Lost OPEN_ACK case .. ISS will retry opening a session
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if session_id in self.states.arq_irs_sessions:
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session = self.states.arq_irs_sessions[session_id]
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# Normal case when receiving a SESSION_OPEN for the first time
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else:
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if self.states.check_if_running_arq_session():
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self.logger.warning("DISCARDING SESSION OPEN because of ongoing ARQ session ", frame=frame)
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return
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session = ARQSessionIRS(self.config,
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self.modem,
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frame['origin'],
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session_id)
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self.states.register_arq_irs_session(session)
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elif frame['frame_type_int'] in [
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FR.ARQ_SESSION_INFO.value,
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FR.ARQ_BURST_FRAME.value,
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FR.ARQ_STOP.value,
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]:
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session = self.states.get_arq_irs_session(session_id)
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elif frame['frame_type_int'] in [
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FR.ARQ_SESSION_OPEN_ACK.value,
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FR.ARQ_SESSION_INFO_ACK.value,
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FR.ARQ_BURST_ACK.value,
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FR.ARQ_STOP_ACK.value
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]:
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session = self.states.get_arq_iss_session(session_id)
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else:
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self.logger.warning("DISCARDING FRAME", frame=frame)
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return
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session.set_details(snr, frequency_offset)
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session.on_frame_received(frame)
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