mirror of
https://github.com/DJ2LS/FreeDATA
synced 2024-05-14 08:04:33 +00:00
151 lines
4.7 KiB
Python
151 lines
4.7 KiB
Python
import helpers
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from event_manager import EventManager
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from state_manager import StateManager
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from queue import Queue
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import structlog
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import time, uuid
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from codec2 import FREEDV_MODE
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TESTMODE = False
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class FrameHandler():
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def __init__(self, name: str, config, states: StateManager, event_manager: EventManager,
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modem) -> None:
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self.name = name
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self.config = config
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self.states = states
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self.event_manager = event_manager
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self.modem = modem
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self.logger = structlog.get_logger("Frame Handler")
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self.details = {
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'frame' : None,
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'snr' : 0,
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'frequency_offset': 0,
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'freedv_inst': None,
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'bytes_per_frame': 0
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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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ft = self.details['frame']['frame_type']
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print(self.details)
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valid = False
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# Check for callsign checksum
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if ft in ['ARQ_SESSION_OPEN', 'ARQ_SESSION_OPEN_ACK', 'PING', 'PING_ACK']:
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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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# Check for session id on IRS side
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elif ft in ['ARQ_SESSION_INFO', 'ARQ_BURST_FRAME', 'ARQ_STOP']:
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session_id = self.details['frame']['session_id']
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if session_id in self.states.arq_irs_sessions:
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valid = True
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# Check for session id on ISS side
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elif ft in ['ARQ_SESSION_INFO_ACK', 'ARQ_BURST_ACK', 'ARQ_STOP_ACK']:
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session_id = self.details['frame']['session_id']
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if session_id in self.states.arq_iss_sessions:
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valid = True
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else:
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valid = False
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if not valid:
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self.logger.info(f"[Frame handler] {ft} received but not for us.")
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return valid
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def should_respond(self):
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return self.is_frame_for_me()
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def add_to_activity_list(self):
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frame = self.details['frame']
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activity = {
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"direction": "received",
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"snr": self.details['snr'],
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"frequency_offset": self.details['frequency_offset'],
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"activity_type": frame["frame_type"]
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}
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if "origin" in frame:
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activity["origin"] = frame["origin"]
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if "destination" in frame:
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activity["destination"] = frame["destination"]
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if "gridsquare" in frame:
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activity["gridsquare"] = frame["gridsquare"]
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if "session_id" in frame:
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activity["session_id"] = frame["session_id"]
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self.states.add_activity(activity)
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def add_to_heard_stations(self):
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frame = self.details['frame']
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if 'origin' not in frame:
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return
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dxgrid = frame['gridsquare'] if 'gridsquare' in frame else "------"
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helpers.add_to_heard_stations(
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frame['origin'],
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dxgrid,
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self.name,
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self.details['snr'],
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self.details['frequency_offset'],
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self.states.radio_frequency,
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self.states.heard_stations,
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)
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def make_event(self):
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event = {
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"type": "frame-handler",
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"received": self.details['frame']['frame_type'],
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"timestamp": int(time.time()),
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"mycallsign": self.config['STATION']['mycall'],
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"myssid": self.config['STATION']['myssid'],
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"snr": str(self.details['snr']),
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}
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if 'origin' in self.details['frame']:
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event['dxcallsign'] = self.details['frame']['origin']
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return event
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def emit_event(self):
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event_data = self.make_event()
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self.event_manager.broadcast(event_data)
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def get_tx_mode(self):
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return FREEDV_MODE.signalling
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def transmit(self, frame):
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if not TESTMODE:
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self.modem.transmit(self.get_tx_mode(), 1, 0, frame)
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else:
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self.event_manager.broadcast(frame)
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def follow_protocol(self):
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pass
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def log(self):
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self.logger.info(f"[Frame Handler] Handling frame {self.details['frame']['frame_type']}")
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def handle(self, frame, snr, frequency_offset, freedv_inst, bytes_per_frame):
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self.details['frame'] = frame
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self.details['snr'] = snr
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self.details['frequency_offset'] = frequency_offset
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self.details['freedv_inst'] = freedv_inst
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self.details['bytes_per_frame'] = bytes_per_frame
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self.log()
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self.add_to_heard_stations()
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self.add_to_activity_list()
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self.emit_event()
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self.follow_protocol()
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