mirror of
https://github.com/DJ2LS/FreeDATA
synced 2024-05-14 08:04:33 +00:00
241 lines
9.6 KiB
Python
241 lines
9.6 KiB
Python
"""
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FRAME DISPATCHER - We are dispatching the received frames to the needed functions
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"""
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import threading
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import helpers
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import structlog
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from modem_frametypes import FRAME_TYPE as FR_TYPE
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import event_manager
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from queues import DATA_QUEUE_RECEIVED, DATA_QUEUE_TRANSMIT, MODEM_TRANSMIT_QUEUE
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from data_frame_factory import DataFrameFactory
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from data_handler_broadcasts import BROADCAST
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from data_handler_data_broadcasts import DATABROADCAST
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from data_handler_ping import PING
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from protocol_arq_iss import ISS
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from protocol_arq_irs import IRS
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from protocol_arq import ARQ
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from protocol_arq_session import SESSION
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class DISPATCHER():
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def __init__(self, config, event_queue, states):
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print("loading frame dispatcher.....\n")
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self.config = config
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self.event_queue = event_queue
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self.states = states
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self._initialize_handlers(config, event_queue, states)
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self._initialize_dispatchers()
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self._initialize_queues()
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def _initialize_handlers(self, config, event_queue, states):
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"""Initializes various data handlers."""
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self.frame_factory = DataFrameFactory(config)
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self.broadcasts = BROADCAST(config, event_queue, states)
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self.data_broadcasts = DATABROADCAST(config, event_queue, states)
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self.ping = PING(config, event_queue, states)
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self.arq = ARQ(config, event_queue, states)
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self.arq_irs = IRS(config, event_queue, states)
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self.arq_iss = ISS(config, event_queue, states)
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self.arq_session = SESSION(config, event_queue, states)
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self.event_manager = event_manager.EventManager([event_queue])
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def _initialize_dispatchers(self):
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"""Initializes dispatchers for handling different frame types."""
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# Dictionary of functions and log messages used in process_data
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# instead of a long series of if-elif-else statements.
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self.rx_dispatcher = {
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FR_TYPE.ARQ_DC_OPEN_ACK_N.value: (
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self.arq_iss.arq_received_channel_is_open,
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"ARQ OPEN ACK (Narrow)",
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),
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FR_TYPE.ARQ_DC_OPEN_ACK_W.value: (
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self.arq_iss.arq_received_channel_is_open,
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"ARQ OPEN ACK (Wide)",
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),
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FR_TYPE.ARQ_DC_OPEN_N.value: (
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self.initialize_arq_transmission_irs,
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"ARQ Data Channel Open (Narrow)",
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),
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FR_TYPE.ARQ_DC_OPEN_W.value: (
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self.initialize_arq_transmission_irs,
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"ARQ Data Channel Open (Wide)",
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),
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FR_TYPE.ARQ_SESSION_CLOSE.value: (
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self.arq_session.received_session_close,
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"ARQ CLOSE SESSION",
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),
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FR_TYPE.ARQ_SESSION_HB.value: (
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self.arq_session.received_session_heartbeat,
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"ARQ HEARTBEAT",
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),
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FR_TYPE.ARQ_SESSION_OPEN.value: (
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self.arq_session.received_session_opener,
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"ARQ OPEN SESSION",
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),
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FR_TYPE.ARQ_STOP.value: (self.arq.received_stop_transmission, "ARQ STOP TX"),
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FR_TYPE.BEACON.value: (self.broadcasts.received_beacon, "BEACON"),
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FR_TYPE.BURST_ACK.value: (self.arq_iss.burst_ack_nack_received, "BURST ACK"),
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FR_TYPE.BURST_NACK.value: (self.arq_iss.burst_ack_nack_received, "BURST NACK"),
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FR_TYPE.CQ.value: (self.broadcasts.received_cq, "CQ"),
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FR_TYPE.FR_ACK.value: (self.arq_iss.frame_ack_received, "FRAME ACK"),
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FR_TYPE.FR_NACK.value: (self.arq_iss.frame_nack_received, "FRAME NACK"),
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FR_TYPE.FR_REPEAT.value: (self.arq_iss.burst_rpt_received, "REPEAT REQUEST"),
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FR_TYPE.PING_ACK.value: (self.ping.received_ping_ack, "PING ACK"),
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FR_TYPE.PING.value: (self.ping.received_ping, "PING"),
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FR_TYPE.QRV.value: (self.broadcasts.received_qrv, "QRV"),
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FR_TYPE.IS_WRITING.value: (self.broadcasts.received_is_writing, "IS_WRITING"),
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FR_TYPE.FEC.value: (self.data_broadcasts.received_fec, "FEC"),
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FR_TYPE.FEC_WAKEUP.value: (self.data_broadcasts.received_fec_wakeup, "FEC WAKEUP"),
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}
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def _initialize_queues(self):
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"""Initializes data queues."""
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self.data_queue_transmit = DATA_QUEUE_TRANSMIT
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self.data_queue_received = DATA_QUEUE_RECEIVED
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def start(self):
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"""Starts worker threads for transmit and receive operations."""
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threading.Thread(target=self.worker_transmit, name="Transmit Worker", daemon=True).start()
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threading.Thread(target=self.worker_receive, name="Receive Worker", daemon=True).start()
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def worker_transmit(self) -> None:
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"""Dispatch incoming UI instructions for transmitting operations"""
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while True:
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command = self.data_queue_transmit.get()
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command.run(self.event_queue, MODEM_TRANSMIT_QUEUE)
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def worker_receive(self) -> None:
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"""Queue received data for processing"""
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while True:
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data = self.data_queue_received.get()
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# [0] bytes
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# [1] freedv instance
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# [2] bytes_per_frame
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# [3] snr
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self.process_data(
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bytes_out=data[0], freedv=data[1], bytes_per_frame=data[2], snr=data[3]
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)
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def process_data(self, bytes_out, freedv, bytes_per_frame: int, snr) -> None:
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"""
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Process incoming data and decide what to do with the frame.
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Args:
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bytes_out:
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freedv:
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bytes_per_frame:
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snr:
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Returns:
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"""
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if self.check_if_valid_frame(bytes_out):
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# get frame as dictionary
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deconstructed_frame = self.frame_factory.deconstruct(bytes_out)
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frametype = deconstructed_frame["frame_type"]
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# Dispatch activity based on received frametype
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if frametype in self.rx_dispatcher:
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# Process frames "known" by rx_dispatcher
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# self.log.debug(f"[Modem] {self.rx_dispatcher[frametype][1]} RECEIVED....")
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self.rx_dispatcher[frametype][0](deconstructed_frame, snr)
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# Process frametypes requiring a different set of arguments.
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elif FR_TYPE.BURST_51.value >= frametype >= FR_TYPE.BURST_01.value:
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self.arq_irs.arq_data_received(
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deconstructed_frame, bytes_per_frame, snr, freedv
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)
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# if we received the last frame of a burst or the last remaining rpt frame, do a modem unsync
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# if self.arq_rx_burst_buffer.count(None) <= 1 or (frame+1) == n_frames_per_burst:
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# self.log.debug(f"[Modem] LAST FRAME OF BURST --> UNSYNC {frame+1}/{n_frames_per_burst}")
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# self.c_lib.freedv_set_sync(freedv, 0)
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# TESTFRAMES
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elif frametype == FR_TYPE.TEST_FRAME.value:
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self.log.debug("[Modem] TESTFRAME RECEIVED", frame=deconstructed_frame)
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# Unknown frame type
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else:
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self.log.warning(
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"[Modem] ARQ - other frame type", frametype=FR_TYPE(frametype).name
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)
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else:
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# for debugging purposes to receive all data
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self.log.debug(
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"[Modem] Foreign frame received",
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frame=bytes_out[:-2].hex(),
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frame_type=FR_TYPE(int.from_bytes(bytes_out[:1], byteorder="big")).name,
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)
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def check_if_valid_frame(self, bytes_out):
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# Process data only if broadcast or we are the receiver
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# bytes_out[1:4] == callsign check for signalling frames,
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# bytes_out[2:5] == transmission
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# we could also create an own function, which returns True.
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frametype = int.from_bytes(bytes(bytes_out[:1]), "big")
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# check for callsign CRC
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_valid1, _ = helpers.check_callsign(self.arq.mycallsign, bytes(bytes_out[1:4]), self.arq.ssid_list)
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_valid2, _ = helpers.check_callsign(self.arq.mycallsign, bytes(bytes_out[2:5]), self.arq.ssid_list)
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# check for session ID
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_valid3 = helpers.check_session_id(self.arq.session_id, bytes(bytes_out[1:2])) # signalling frames
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_valid4 = helpers.check_session_id(self.arq.session_id, bytes(bytes_out[2:3])) # arq data frames
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if (
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_valid1
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or _valid2
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or _valid3
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or _valid4
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or frametype
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in [
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FR_TYPE.CQ.value,
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FR_TYPE.QRV.value,
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FR_TYPE.PING.value,
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FR_TYPE.BEACON.value,
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FR_TYPE.IS_WRITING.value,
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FR_TYPE.FEC.value,
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FR_TYPE.FEC_WAKEUP.value,
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]
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):
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return True
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return False
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def get_id_from_frame(self, data):
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if data[:1] in [FR_TYPE.ARQ_DC_OPEN_N, FR_TYPE.ARQ_DC_OPEN_W]:
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session_id = data[13:14]
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return session_id
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return None
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def initialize_arq_instance(self):
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self.arq = ARQ(self.config, self.event_queue, self.states)
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self.arq_irs = IRS(self.config, self.event_queue, self.states)
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self.arq_iss = ISS(self.config, self.event_queue, self.states)
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self.arq_session = SESSION(self.config, self.event_queue, self.states)
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return {
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'arq': self.arq,
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'arq_irs': self.arq_irs,
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'arq_iss': self.arq_iss,
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'arq_session': self.arq_session
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}
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def initialize_arq_transmission_irs(self, data):
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if id := self.get_id_from_frame(data):
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instance = self.initialize_arq_instance()
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self.states.register_arq_instance_by_id(id, instance)
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instance['arq_irs'].arq_received_data_channel_opener |