FreeDATA/tests/test_arq_session.py

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import sys
sys.path.append('modem')
import unittest
import unittest.mock
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from config import CONFIG
import helpers
import queue
import threading
import base64
from command_arq_raw import ARQRawCommand
from state_manager import StateManager
from frame_dispatcher import DISPATCHER
import random
import structlog
import numpy as np
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from event_manager import EventManager
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from data_frame_factory import DataFrameFactory
import codec2
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class TestModem:
def __init__(self, event_q):
self.data_queue_received = queue.Queue()
self.demodulator = unittest.mock.Mock()
self.event_manager = EventManager([event_q])
self.logger = structlog.get_logger('Modem')
def getFrameTransmissionTime(self, mode):
samples = 0
c2instance = codec2.open_instance(mode.value)
samples += codec2.api.freedv_get_n_tx_preamble_modem_samples(c2instance)
samples += codec2.api.freedv_get_n_tx_modem_samples(c2instance)
samples += codec2.api.freedv_get_n_tx_postamble_modem_samples(c2instance)
time = samples / 8000
return time
def transmit(self, mode, repeats: int, repeat_delay: int, frames: bytearray) -> bool:
# Simulate transmission time
tx_time = self.getFrameTransmissionTime(mode) + 0.1 # PTT
self.logger.info(f"TX {tx_time} seconds...")
threading.Event().wait(tx_time)
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transmission = {
'mode': mode,
'bytes': frames,
}
self.data_queue_received.put(transmission)
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class TestARQSession(unittest.TestCase):
@classmethod
def setUpClass(cls):
config_manager = CONFIG('modem/config.ini.example')
cls.config = config_manager.read()
cls.logger = structlog.get_logger("TESTS")
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cls.frame_factory = DataFrameFactory(cls.config)
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# ISS
cls.iss_state_manager = StateManager(queue.Queue())
cls.iss_event_queue = queue.Queue()
cls.iss_modem = TestModem(cls.iss_event_queue)
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cls.iss_frame_dispatcher = DISPATCHER(cls.config,
cls.iss_event_queue,
cls.iss_state_manager,
cls.iss_modem)
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# IRS
cls.irs_state_manager = StateManager(queue.Queue())
cls.irs_event_queue = queue.Queue()
cls.irs_modem = TestModem(cls.irs_event_queue)
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cls.irs_frame_dispatcher = DISPATCHER(cls.config,
cls.irs_event_queue,
cls.irs_state_manager,
cls.irs_modem)
# Frame loss probability in %
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cls.loss_probability = 30
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cls.channels_running = True
def channelWorker(self, modem_transmit_queue: queue.Queue, frame_dispatcher: DISPATCHER):
while self.channels_running:
# Transfer data between both parties
try:
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transmission = modem_transmit_queue.get(timeout=1)
if random.randint(0, 100) < self.loss_probability:
self.logger.info(f"[{threading.current_thread().name}] Frame lost...")
continue
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frame_bytes = transmission['bytes']
frame_dispatcher.new_process_data(frame_bytes, None, len(frame_bytes), 0, 0)
except queue.Empty:
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continue
self.logger.info(f"[{threading.current_thread().name}] Channel closed.")
def waitForSession(self, q, outbound = False):
key = 'arq-transfer-outbound' if outbound else 'arq-transfer-inbound'
while True:
ev = q.get()
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if key in ev and ('success' in ev[key] or 'ABORTED' in ev[key]):
self.logger.info(f"[{threading.current_thread().name}] {key} session ended.")
break
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def establishChannels(self):
self.channels_running = True
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self.iss_to_irs_channel = threading.Thread(target=self.channelWorker,
args=[self.iss_modem.data_queue_received,
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self.irs_frame_dispatcher],
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name = "ISS to IRS channel")
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self.iss_to_irs_channel.start()
self.irs_to_iss_channel = threading.Thread(target=self.channelWorker,
args=[self.irs_modem.data_queue_received,
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self.iss_frame_dispatcher],
name = "IRS to ISS channel")
self.irs_to_iss_channel.start()
def waitAndCloseChannels(self):
self.waitForSession(self.iss_event_queue, True)
self.waitForSession(self.irs_event_queue, False)
self.channels_running = False
def testARQSessionSmallPayload(self):
# set Packet Error Rate (PER) / frame loss probability
self.loss_probability = 50
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self.establishChannels()
params = {
'dxcall': "DJ2LS-3",
'data': base64.b64encode(bytes("Hello world!", encoding="utf-8")),
}
cmd = ARQRawCommand(self.config, self.iss_state_manager, self.iss_event_queue, params)
cmd.run(self.iss_event_queue, self.iss_modem)
self.waitAndCloseChannels()
def DisabledtestARQSessionLargePayload(self):
# set Packet Error Rate (PER) / frame loss probability
self.loss_probability = 0
self.establishChannels()
params = {
'dxcall': "DJ2LS-3",
'data': base64.b64encode(np.random.bytes(1000)),
}
cmd = ARQRawCommand(self.config, self.iss_state_manager, self.iss_event_queue, params)
cmd.run(self.iss_event_queue, self.iss_modem)
self.waitAndCloseChannels()
def testARQSessionAbortTransmissionISS(self):
# set Packet Error Rate (PER) / frame loss probability
self.loss_probability = 0
self.establishChannels()
params = {
'dxcall': "DJ2LS-3",
'data': base64.b64encode(np.random.bytes(100)),
}
cmd = ARQRawCommand(self.config, self.iss_state_manager, self.iss_event_queue, params)
cmd.run(self.iss_event_queue, self.iss_modem)
threading.Event().wait(np.random.randint(1,10))
for id in self.iss_state_manager.arq_iss_sessions:
self.iss_state_manager.arq_iss_sessions[id].abort_transmission()
self.waitAndCloseChannels()
def testARQSessionAbortTransmissionIRS(self):
# set Packet Error Rate (PER) / frame loss probability
self.loss_probability = 0
self.establishChannels()
params = {
'dxcall': "DJ2LS-3",
'data': base64.b64encode(np.random.bytes(100)),
}
cmd = ARQRawCommand(self.config, self.iss_state_manager, self.iss_event_queue, params)
cmd.run(self.iss_event_queue, self.iss_modem)
threading.Event().wait(np.random.randint(1,10))
for id in self.irs_state_manager.arq_irs_sessions:
self.irs_state_manager.arq_irs_sessions[id].abort_transmission()
self.waitAndCloseChannels()
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if __name__ == '__main__':
unittest.main()