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FreeDATA/data_handler.py

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renamed arq module to data_handler
2021-02-24 13:22:28 +00:00
#!/usr/bin/env python3
# -*- coding: utf-8 -*-
"""
Created on Sun Dec 27 20:43:40 2020
@author: DJ2LS
"""
smaller PEP8 cleanup
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renamed arq module to data_handler
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import logging
import threading
import time
from random import randrange
code cleanup
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import asyncio
heard stations buffer
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import sys
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import static
import modem
import helpers
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modem = modem.RF()
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code cleanup
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smaller PEP8 cleanup
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# ############################################################################################################
first connect, cq and ping handler
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# ARQ DATA HANDLER
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# ############################################################################################################
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first attempt with ASYNCIO instead of THREADING
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def arq_data_received(data_in):
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static.TNC_STATE = 'BUSY'
first try with data channel timeout and keep alive
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static.ARQ_DATA_CHANNEL_LAST_RECEIVED = int(time.time())
smaller PEP8 cleanup
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static.ARQ_N_FRAME = int.from_bytes(bytes(data_in[:1]), "big") - 10 # get number of burst frame
static.ARQ_N_RX_FRAMES_PER_BURSTS = int.from_bytes(bytes(data_in[1:2]), "big") # get number of bursts from received frame
static.ARQ_RX_N_CURRENT_ARQ_FRAME = int.from_bytes(bytes(data_in[2:4]), "big") # get current number of total frames
static.ARQ_N_ARQ_FRAMES_PER_DATA_FRAME = int.from_bytes(bytes(data_in[4:6]), "big") # get get total number of frames
renamed arq module to data_handler
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smaller PEP8 cleanup
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logging.debug("----------------------------------------------------------------")
logging.debug("ARQ_N_FRAME: " + str(static.ARQ_N_FRAME))
logging.debug("ARQ_N_RX_FRAMES_PER_BURSTS: " + str(static.ARQ_N_RX_FRAMES_PER_BURSTS))
logging.debug("ARQ_RX_N_CURRENT_ARQ_FRAME: " + str(static.ARQ_RX_N_CURRENT_ARQ_FRAME))
logging.debug("ARQ_N_ARQ_FRAMES_PER_DATA_FRAME: " + str(static.ARQ_N_ARQ_FRAMES_PER_DATA_FRAME))
logging.debug("----------------------------------------------------------------")
arq_percent_burst = int((static.ARQ_N_FRAME / static.ARQ_N_RX_FRAMES_PER_BURSTS) * 100)
arq_percent_frame = int(((static.ARQ_RX_N_CURRENT_ARQ_FRAME) / static.ARQ_N_ARQ_FRAMES_PER_DATA_FRAME) * 100)
logging.log(24, "ARQ | RX | " + str(static.ARQ_DATA_CHANNEL_MODE) + " | F:[" + str(static.ARQ_N_FRAME) + "/" + str(static.ARQ_N_RX_FRAMES_PER_BURSTS) + "] [" + str(arq_percent_burst).zfill(3) + "%] T:[" + str(static.ARQ_RX_N_CURRENT_ARQ_FRAME) + "/" + str(static.ARQ_N_ARQ_FRAMES_PER_DATA_FRAME) + "] [" + str(arq_percent_frame).zfill(3) + "%] [BER." + str(static.BER) + "]")
# allocate ARQ_RX_FRAME_BUFFER as a list with "None" if not already done. This should be done only once per burst!
# here we will save the N frame of a data frame to N list position so we can explicit search for it
# delete frame buffer if first frame to make sure the buffer is cleared and no junks of a old frame is remaining
if static.ARQ_RX_N_CURRENT_ARQ_FRAME == 1:
static.ARQ_RX_FRAME_BUFFER = []
try:
static.ARQ_RX_FRAME_BUFFER[static.ARQ_RX_N_CURRENT_ARQ_FRAME] = bytes(data_in)
except IndexError:
static.ARQ_RX_FRAME_BUFFER = []
for i in range(0, static.ARQ_N_ARQ_FRAMES_PER_DATA_FRAME + 1):
static.ARQ_RX_FRAME_BUFFER.insert(i, None)
static.ARQ_RX_FRAME_BUFFER[static.ARQ_RX_N_CURRENT_ARQ_FRAME] = bytes(data_in)
static.ARQ_FRAME_BOF_RECEIVED = False
static.ARQ_FRAME_EOF_RECEIVED = False
try:
static.ARQ_RX_BURST_BUFFER[static.ARQ_N_FRAME] = bytes(data_in)
except IndexError:
static.ARQ_RX_BURST_BUFFER = []
for i in range(0, static.ARQ_N_RX_FRAMES_PER_BURSTS + 1):
static.ARQ_RX_BURST_BUFFER.insert(i, None)
static.ARQ_RX_BURST_BUFFER[static.ARQ_N_FRAME] = bytes(data_in)
# - ------------------------- ARQ BURST CHECKER
# run only if we recieved all ARQ FRAMES per ARQ BURST
if static.ARQ_RX_BURST_BUFFER.count(None) == 1: # count nones
logging.info("ARQ | TX | BURST ACK")
# BUILDING ACK FRAME FOR BURST -----------------------------------------------
ack_frame = bytearray(14)
ack_frame[:1] = bytes([60])
ack_frame[1:2] = static.DXCALLSIGN_CRC8
ack_frame[2:3] = static.MYCALLSIGN_CRC8
cleanup and removed connection feature CONNECT / DISCONNECT / KEEP ALIVE causes too much problems regarding to speed, efficiency and stability
2021-03-16 09:55:48 +00:00
smaller PEP8 cleanup
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# TRANSMIT ACK FRAME FOR BURST-----------------------------------------------
modem.transmit_signalling(ack_frame)
while static.CHANNEL_STATE == 'SENDING_SIGNALLING':
time.sleep(0.01)
static.CHANNEL_STATE = 'RECEIVING_DATA'
# clear burst buffer
static.ARQ_RX_BURST_BUFFER = []
# if decoded N frames are unequal to expected frames per burst
elif static.ARQ_N_FRAME == static.ARQ_N_RX_FRAMES_PER_BURSTS and static.ARQ_RX_BURST_BUFFER.count(None) != 1:
# --------------- CHECK WHICH BURST FRAMES WE ARE MISSING -------------------------------------------
missing_frames = b''
for burstnumber in range(1, len(static.ARQ_RX_BURST_BUFFER)):
if static.ARQ_RX_BURST_BUFFER[burstnumber] == None:
# frame_number = static.ARQ_RX_N_CURRENT_ARQ_FRAME - static.ARQ_N_RX_FRAMES_PER_BURSTS + burstnumber
# logging.debug("frame_number" + str(frame_number))
logging.debug("static.ARQ_RX_N_CURRENT_ARQ_FRAME" + str(static.ARQ_RX_N_CURRENT_ARQ_FRAME))
logging.debug("ARQ_N_RX_FRAMES_PER_BURSTS" + str(static.ARQ_N_RX_FRAMES_PER_BURSTS))
frame_number = burstnumber
frame_number = frame_number.to_bytes(2, byteorder='big')
missing_frames += frame_number
logging.warning("ARQ | TX | RPT ARQ FRAMES [" + str(missing_frames) + "] [BER." + str(static.BER) + "]")
# BUILDING RPT FRAME FOR BURST -----------------------------------------------
rpt_frame = bytearray(14)
rpt_frame[:1] = bytes([63])
rpt_frame[1:2] = static.DXCALLSIGN_CRC8
rpt_frame[2:3] = static.MYCALLSIGN_CRC8
rpt_frame[3:9] = missing_frames
# TRANSMIT RPT FRAME FOR BURST-----------------------------------------------
modem.transmit_signalling(rpt_frame)
while static.CHANNEL_STATE == 'SENDING_SIGNALLING':
time.sleep(0.01)
static.CHANNEL_STATE = 'RECEIVING_DATA'
# ---------------------------- FRAME MACHINE
# --------------- IF LIST NOT CONTAINS "None" stick everything together
complete_data_frame = bytearray()
# print("static.ARQ_RX_FRAME_BUFFER.count(None)" + str(static.ARQ_RX_FRAME_BUFFER.count(None)))
if static.ARQ_RX_FRAME_BUFFER.count(None) == 1: # 1 because position 0 of list will alaways be None in our case
logging.debug("DECODING FRAME!")
for frame in range(1, len(static.ARQ_RX_FRAME_BUFFER)):
raw_arq_frame = static.ARQ_RX_FRAME_BUFFER[frame]
arq_frame_payload = raw_arq_frame[8:]
# -------- DETECT IF WE RECEIVED A FRAME HEADER THEN SAVE DATA TO GLOBALS
if arq_frame_payload[2:4].startswith(static.FRAME_BOF):
static.FRAME_CRC = arq_frame_payload[:2]
static.ARQ_FRAME_BOF_RECEIVED = True
arq_frame_payload = arq_frame_payload.split(static.FRAME_BOF)
arq_frame_payload = arq_frame_payload[1]
logging.debug("BOF")
# -------- DETECT IF WE RECEIVED A FRAME FOOTER THEN SAVE DATA TO GLOBALS
# we need to check for at least one xFF. Sometimes we have only one xFF, because the second one is in the next frame
if arq_frame_payload.rstrip(b'\x00').endswith(static.FRAME_EOF) or arq_frame_payload.rstrip(b'\x00').endswith(static.FRAME_EOF[:-1]):
static.ARQ_FRAME_EOF_RECEIVED = True
if arq_frame_payload.rstrip(b'\x00').endswith(static.FRAME_EOF[:-1]):
arq_frame_payload = arq_frame_payload.split(static.FRAME_EOF[:-1])
arq_frame_payload = arq_frame_payload[0]
else:
arq_frame_payload = arq_frame_payload.split(static.FRAME_EOF)
arq_frame_payload = arq_frame_payload[0]
logging.debug("EOF")
# --------- AFTER WE SEPARATED BOF AND EOF, STICK EVERYTHING TOGETHER
complete_data_frame = complete_data_frame + arq_frame_payload
logging.debug(complete_data_frame)
# check if Begin of Frame BOF and End of Frame EOF are received, then start calculating CRC and sticking everything together
if static.ARQ_FRAME_BOF_RECEIVED == True and static.ARQ_FRAME_EOF_RECEIVED == True:
frame_payload_crc = helpers.get_crc_16(complete_data_frame)
# IF THE FRAME PAYLOAD CRC IS EQUAL TO THE FRAME CRC WHICH IS KNOWN FROM THE HEADER --> SUCCESS
if frame_payload_crc == static.FRAME_CRC:
logging.log(25, "ARQ | RX | DATA FRAME SUCESSFULLY RECEIVED! :-) ")
# append received frame to RX_BUFFER
static.RX_BUFFER.append(complete_data_frame)
# BUILDING ACK FRAME FOR DATA FRAME -----------------------------------------------
updated other signalling frams with callsign crc8
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ack_frame = bytearray(14)
smaller PEP8 cleanup
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ack_frame[:1] = bytes([61])
updated other signalling frams with callsign crc8
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ack_frame[1:2] = static.DXCALLSIGN_CRC8
ack_frame[2:3] = static.MYCALLSIGN_CRC8
smaller PEP8 cleanup
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# TRANSMIT ACK FRAME FOR BURST-----------------------------------------------
time.sleep(1) # 0.5
logging.info("ARQ | TX | ARQ DATA FRAME ACK [" + str(static.FRAME_CRC.hex()) + "] [BER." + str(static.BER) + "]")
renamed arq module to data_handler
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modem.transmit_signalling(ack_frame)
test with wait for data channel
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while static.CHANNEL_STATE == 'SENDING_SIGNALLING':
time.sleep(0.01)
state improvements really ugly debugging output inside....
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helpers.arq_reset_frame_machine()
smaller PEP8 cleanup
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logging.info("DATA [" + str(static.MYCALLSIGN, 'utf-8') + "]<< >>[" + str(static.DXCALLSIGN, 'utf-8') + "] [BER." + str(static.BER) + "]")
state improvements really ugly debugging output inside....
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smaller PEP8 cleanup
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else:
print("ARQ_FRAME_BOF_RECEIVED " + str(static.ARQ_FRAME_BOF_RECEIVED))
print("ARQ_FRAME_EOF_RECEIVED " + str(static.ARQ_FRAME_EOF_RECEIVED))
logging.error("ARQ | RX | DATA FRAME NOT SUCESSFULLY RECEIVED!")
state improvements really ugly debugging output inside....
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helpers.arq_reset_frame_machine()
cleanup and removed connection feature CONNECT / DISCONNECT / KEEP ALIVE causes too much problems regarding to speed, efficiency and stability
2021-03-16 09:55:48 +00:00
logging.info("DATA [" + str(static.MYCALLSIGN, 'utf-8') + "]<<X>>[" + str(static.DXCALLSIGN, 'utf-8') + "] [BER." + str(static.BER) + "]")
renamed arq module to data_handler
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fall back to threading --> asyncio causes probs
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def arq_transmit(data_out):
smaller PEP8 cleanup
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# we need to set payload per frame manually at this point. maybe we can do this more dynmic.
if static.ARQ_DATA_CHANNEL_MODE == 10:
payload_per_frame = 512 - 2
elif static.ARQ_DATA_CHANNEL_MODE == 11:
payload_per_frame = 256 - 2
elif static.ARQ_DATA_CHANNEL_MODE == 12:
payload_per_frame = 128 - 2
elif static.ARQ_DATA_CHANNEL_MODE == 14:
payload_per_frame = 16 - 2
else:
payload_per_frame = 16 - 2
static.ARQ_PAYLOAD_PER_FRAME = payload_per_frame - 8
# print("static.ARQ_DATA_PAYLOAD_PER_FRAME " + str(static.FREEDV_DATA_PAYLOAD_PER_FRAME))
# print("static.ARQ_PAYLOAD_PER_FRAME " + str(static.ARQ_PAYLOAD_PER_FRAME))
frame_header_length = 6 # 4
n_arq_frames_per_data_frame = (len(data_out) + frame_header_length) // static.ARQ_PAYLOAD_PER_FRAME + ((len(data_out) + frame_header_length) % static.ARQ_PAYLOAD_PER_FRAME > 0)
frame_payload_crc = helpers.get_crc_16(data_out)
# This is the total frame with frame header, which will be send
data_out = frame_payload_crc + static.FRAME_BOF + data_out + static.FRAME_EOF
# 2 2 N 2
# --------------------------------------------- LETS CREATE A BUFFER BY SPLITTING THE FILES INTO PEACES
static.TX_BUFFER = [data_out[i:i + static.ARQ_PAYLOAD_PER_FRAME] for i in range(0, len(data_out), static.ARQ_PAYLOAD_PER_FRAME)]
static.TX_BUFFER_SIZE = len(static.TX_BUFFER)
logging.info("ARQ | TX | M:" + str(static.ARQ_DATA_CHANNEL_MODE) + " | DATA FRAME --- BYTES: " + str(len(data_out)) + " ARQ FRAMES: " + str(static.TX_BUFFER_SIZE))
# --------------------------------------------- THIS IS THE MAIN LOOP-----------------------------------------------------------------
static.ARQ_N_SENT_FRAMES = 0 # SET N SENT FRAMES TO 0 FOR A NEW SENDING CYCLE
while static.ARQ_N_SENT_FRAMES <= static.TX_BUFFER_SIZE:
static.ARQ_TX_N_FRAMES_PER_BURST = get_n_frames_per_burst()
# ----------- CREATE FRAME TOTAL PAYLOAD TO BE ABLE TO CREATE CRC FOR IT
try: # DETECT IF LAST BURST TO PREVENT INDEX ERROR OF BUFFER
for i in range(static.ARQ_TX_N_FRAMES_PER_BURST): # Loop through TX_BUFFER LIST
len(static.TX_BUFFER[static.ARQ_N_SENT_FRAMES + i]) # we calculate the length to trigger a list index error
except IndexError: # IF LAST BURST DETECTED BUILD CRC WITH LESS FRAMES AND SET static.ARQ_TX_N_FRAMES_PER_BURST TO VALUE OF REST!
if static.ARQ_N_SENT_FRAMES == 0 and (static.ARQ_TX_N_FRAMES_PER_BURST > static.TX_BUFFER_SIZE): # WE CANT DO MODULO 0 --> CHECK IF FIRST FRAME == LAST FRAME
static.ARQ_TX_N_FRAMES_PER_BURST = static.TX_BUFFER_SIZE
elif static.ARQ_N_SENT_FRAMES == 1 and (static.ARQ_TX_N_FRAMES_PER_BURST > static.TX_BUFFER_SIZE): # MODULO 1 WILL ALWAYS BE 0 --> THIS FIXES IT
static.ARQ_TX_N_FRAMES_PER_BURST = static.TX_BUFFER_SIZE - static.ARQ_N_SENT_FRAMES
first working data channel
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else:
smaller PEP8 cleanup
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static.ARQ_TX_N_FRAMES_PER_BURST = (static.TX_BUFFER_SIZE % static.ARQ_N_SENT_FRAMES)
# --------------------------------------------- N ATTEMPTS TO SEND BURSTS IF ACK RECEPTION FAILS
for static.TX_N_RETRIES in range(static.TX_N_MAX_RETRIES):
if static.ARQ_N_SENT_FRAMES + 1 <= static.TX_BUFFER_SIZE:
logging.log(24, "ARQ | TX | M:" + str(static.ARQ_DATA_CHANNEL_MODE) + " | F:[" + str(static.ARQ_N_SENT_FRAMES + 1) + "-" + str(static.ARQ_N_SENT_FRAMES + static.ARQ_TX_N_FRAMES_PER_BURST) + "] | T:[" + str(static.ARQ_N_SENT_FRAMES) + "/" + str(static.TX_BUFFER_SIZE) + "] [" + str(int(static.ARQ_N_SENT_FRAMES / (static.TX_BUFFER_SIZE) * 100)).zfill(3) + "%] | A:[" + str(static.TX_N_RETRIES + 1) + "/" + str(static.TX_N_MAX_RETRIES) + "] [BER." + str(static.BER) + "]")
cleanup and removed connection feature CONNECT / DISCONNECT / KEEP ALIVE causes too much problems regarding to speed, efficiency and stability
2021-03-16 09:55:48 +00:00
smaller PEP8 cleanup
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modem.transmit_arq_burst()
# lets wait during sending. After sending is finished we will continue
while static.CHANNEL_STATE == 'SENDING_DATA':
time.sleep(0.01)
# --------------------------- START TIMER FOR WAITING FOR ACK ---> IF TIMEOUT REACHED, ACK_TIMEOUT = 1
fixed some ARQ timing issues
2021-03-16 10:39:22 +00:00
logging.debug("ARQ | RX | WAITING FOR BURST ACK")
smaller PEP8 cleanup
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static.CHANNEL_STATE = 'RECEIVING_SIGNALLING'
helpers.arq_reset_timeout(False)
helpers.arq_reset_ack(False)
acktimer = threading.Timer(static.ARQ_RX_ACK_TIMEOUT_SECONDS, helpers.arq_ack_timeout)
acktimer.start()
logging.debug(".............................")
logging.debug("static.ARQ_STATE " + str(static.ARQ_STATE))
logging.debug("static.ARQ_FRAME_ACK_RECEIVED " + str(static.ARQ_FRAME_ACK_RECEIVED))
logging.debug("static.ARQ_ACK_RECEIVED " + str(static.ARQ_ACK_RECEIVED))
logging.debug("static.ARQ_RX_ACK_TIMEOUT " + str(static.ARQ_RX_ACK_TIMEOUT))
logging.debug("static.ARQ_RPT_RECEIVED " + str(static.ARQ_RPT_RECEIVED))
logging.debug(".............................")
# --------------------------- WHILE TIMEOUT NOT REACHED AND NO ACK RECEIVED --> LISTEN
while static.ARQ_ACK_RECEIVED != True and static.ARQ_RPT_RECEIVED != True and static.ARQ_FRAME_ACK_RECEIVED != True and static.ARQ_RX_FRAME_TIMEOUT != True and static.ARQ_RX_ACK_TIMEOUT != True:
time.sleep(0.01) # lets reduce CPU load a little bit
logging.debug(static.CHANNEL_STATE)
if static.ARQ_RPT_RECEIVED == True:
logging.warning("ARQ | RX | REQUEST FOR REPEATING FRAMES: " + str(static.ARQ_RPT_FRAMES))
logging.warning("ARQ | TX | SENDING REQUESTED FRAMES: " + str(static.ARQ_RPT_FRAMES))
modem.transmit_arq_burst()
# lets wait during sending. After sending is finished we will continue
while static.ARQ_STATE == 'SENDING_DATA':
time.sleep(0.01)
beacon placeholder and connect optimization
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static.CHANNEL_STATE = 'RECEIVING_SIGNALLING'
smaller PEP8 cleanup
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helpers.arq_reset_timeout(False)
helpers.arq_reset_ack(False)
rpttimer = threading.Timer(static.ARQ_RX_RPT_TIMEOUT_SECONDS, helpers.arq_rpt_timeout)
rpttimer.start()
while static.ARQ_ACK_RECEIVED == False and static.ARQ_FRAME_ACK_RECEIVED == False and static.ARQ_RX_RPT_TIMEOUT == False:
time.sleep(0.01) # lets reduce CPU load a little bit
fixed some ARQ timing issues
2021-03-16 10:39:22 +00:00
logging.info(static.ARQ_STATE)
smaller PEP8 cleanup
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if static.ARQ_ACK_RECEIVED == True:
logging.info("ARQ | RX | ACK AFTER RPT")
rpttimer.cancel()
helpers.arq_reset_ack(True)
static.ARQ_RPT_FRAMES = []
if static.ARQ_RX_RPT_TIMEOUT == True and static.ARQ_ACK_RECEIVED == False:
logging.error("ARQ | Burst lost....")
helpers.arq_reset_ack(False)
static.ARQ_RPT_FRAMES = []
# --------------------------------------------------------------------------------------------------------------
fixed some ARQ timing issues
2021-03-16 10:39:22 +00:00
elif static.ARQ_ACK_RECEIVED == False and static.ARQ_RX_ACK_TIMEOUT == True:
smaller PEP8 cleanup
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logging.warning("ARQ | RX | ACK TIMEOUT!")
pass # no break here so we can continue with the next try of repeating the burst
# --------------- BREAK LOOP IF ACK HAS BEEN RECEIVED
elif static.ARQ_ACK_RECEIVED == True:
logging.info("ARQ | RX | ACK")
acktimer.cancel()
# -----------IF ACK RECEIVED, INCREMENT ITERATOR FOR MAIN LOOP TO PROCEED WITH NEXT FRAMES/BURST
static.ARQ_N_SENT_FRAMES = static.ARQ_N_SENT_FRAMES + static.ARQ_TX_N_FRAMES_PER_BURST
break
# --------------- BREAK LOOP IF FRAME ACK HAS BEEN RECEIVED EARLIER AS EXPECTED
elif static.ARQ_FRAME_ACK_RECEIVED == True:
logging.info("ARQ | RX | EARLY FRAME ACK RECEIVED")
# static.ARQ_N_SENT_FRAMES = #static.TX_BUFFER_SIZE
static.ARQ_N_SENT_FRAMES = static.ARQ_N_SENT_FRAMES + static.ARQ_TX_N_FRAMES_PER_BURST
break
else:
fixed some ARQ timing issues
2021-03-16 10:39:22 +00:00
logging.info("------------------------------->NO RULE MATCHED!")
print("ARQ_ACK_RECEIVED " + str(static.ARQ_ACK_RECEIVED))
print("ARQ_RX_ACK_TIMEOUT " + str(static.ARQ_RX_ACK_TIMEOUT))
smaller PEP8 cleanup
2021-03-12 13:14:36 +00:00
break
# --------------------------------WAITING AREA FOR FRAME ACKs
logging.debug("static.ARQ_N_SENT_FRAMES " + str(static.ARQ_N_SENT_FRAMES))
logging.debug("static.TX_BUFFER_SIZE " + str(static.TX_BUFFER_SIZE))
logging.debug("static.TX_N_RETRIES " + str(static.TX_N_RETRIES))
logging.debug("static.TX_N_MAX_RETRIES " + str(static.TX_N_MAX_RETRIES))
logging.debug("static.ARQ_STATE " + str(static.ARQ_STATE))
logging.debug("static.ARQ_FRAME_ACK_RECEIVED " + str(static.ARQ_FRAME_ACK_RECEIVED))
logging.debug("static.ARQ_RX_FRAME_TIMEOUT " + str(static.ARQ_RX_FRAME_TIMEOUT))
logging.debug("static.ARQ_ACK_RECEIVED " + str(static.ARQ_ACK_RECEIVED))
logging.debug("static.ARQ_RX_ACK_TIMEOUT " + str(static.ARQ_RX_ACK_TIMEOUT))
logging.debug("static.ARQ_RPT_RECEIVED " + str(static.ARQ_RPT_RECEIVED))
logging.debug("static.ARQ_TX_N_FRAMES_PER_BURST " + str(static.ARQ_TX_N_FRAMES_PER_BURST))
frametimer = threading.Timer(static.ARQ_RX_FRAME_TIMEOUT_SECONDS, helpers.arq_frame_timeout)
frametimer.start()
static.CHANNEL_STATE = 'RECEIVING_SIGNALLING'
# wait for frame ACK if we processed the last frame/burst
while static.ARQ_FRAME_ACK_RECEIVED == False and static.ARQ_RX_FRAME_TIMEOUT == False and static.ARQ_N_SENT_FRAMES == static.TX_BUFFER_SIZE:
time.sleep(0.01) # lets reduce CPU load a little bit
logging.debug("WAITING FOR FRAME ACK")
# ----------- if no ACK received and out of retries.....stop frame sending
if static.ARQ_ACK_RECEIVED == False and static.ARQ_FRAME_ACK_RECEIVED == False and static.ARQ_RX_ACK_TIMEOUT == True:
logging.error("ARQ | TX | NO ACK RECEIVED | DATA SHOULD BE RESEND!")
break
# -------------------------BREAK TX BUFFER LOOP IF ALL PACKETS HAVE BEEN SENT AND WE GOT A FRAME ACK
elif static.ARQ_N_SENT_FRAMES == static.TX_BUFFER_SIZE and static.ARQ_FRAME_ACK_RECEIVED == True:
logging.log(25, "ARQ | RX | FRAME ACK RECEIVED - DATA TRANSMITTED! :-)")
break
elif static.ARQ_FRAME_ACK_RECEIVED == False and static.ARQ_RX_FRAME_TIMEOUT == True:
logging.error("ARQ | TX | NO FRAME ACK RECEIVED")
break
else:
logging.debug("NO MATCHING RULE AT THE END")
# stop all timers
try:
frametimer.cancel()
except Exception:
pass
try:
acktimer.cancel()
except Exception:
pass
# IF TX BUFFER IS EMPTY / ALL FRAMES HAVE BEEN SENT --> HERE WE COULD ADD AN static.VAR for IDLE STATE
logging.info("ARQ | TX | BUFFER EMPTY")
helpers.arq_reset_frame_machine()
# await asyncio.sleep(2)
time.sleep(2)
logging.info("DATA [" + str(static.MYCALLSIGN, 'utf-8') + "]<< >>[" + str(static.DXCALLSIGN, 'utf-8') + "] [BER." + str(static.BER) + "]")
state improvements really ugly debugging output inside....
2021-03-15 18:43:04 +00:00
cleanup and removed connection feature CONNECT / DISCONNECT / KEEP ALIVE causes too much problems regarding to speed, efficiency and stability
2021-03-16 09:55:48 +00:00
#####arq_transmit_keep_alive()
smaller PEP8 cleanup
2021-03-12 13:14:36 +00:00
# this should close our thread so we are saving memory...
# https://stackoverflow.com/questions/905189/why-does-sys-exit-not-exit-when-called-inside-a-thread-in-python
sys.exit()
# BURST MACHINE TO DEFINE N BURSTS PER FRAME ---> LATER WE CAN USE CHANNEL MESSUREMENT TO SET FRAMES PER BURST
renamed arq module to data_handler
2021-02-24 13:22:28 +00:00
def get_n_frames_per_burst():
first attempt with ASYNCIO instead of THREADING
2021-03-04 13:28:01 +00:00
#n_frames_per_burst = randrange(1,10)
smaller PEP8 cleanup
2021-03-12 13:14:36 +00:00
n_frames_per_burst = 1
renamed arq module to data_handler
2021-02-24 13:22:28 +00:00
return n_frames_per_burst
smaller PEP8 cleanup
2021-03-12 13:14:36 +00:00
renamed arq module to data_handler
2021-02-24 13:22:28 +00:00
def burst_ack_received():
smaller PEP8 cleanup
2021-03-12 13:14:36 +00:00
static.ARQ_ACK_RECEIVED = True # Force data loops of TNC to stop and continue with next frame
state improvements really ugly debugging output inside....
2021-03-15 18:43:04 +00:00
static.ARQ_DATA_CHANNEL_LAST_RECEIVED = int(time.time()) # we need to update our timeout timestamp
renamed arq module to data_handler
2021-02-24 13:22:28 +00:00
def frame_ack_received():
smaller PEP8 cleanup
2021-03-12 13:14:36 +00:00
static.ARQ_FRAME_ACK_RECEIVED = True # Force data loops of TNC to stop and continue with next frame
state improvements really ugly debugging output inside....
2021-03-15 18:43:04 +00:00
static.ARQ_DATA_CHANNEL_LAST_RECEIVED = int(time.time()) # we need to update our timeout timestamp
smaller PEP8 cleanup
2021-03-12 13:14:36 +00:00
renamed arq module to data_handler
2021-02-24 13:22:28 +00:00
def burst_rpt_received(data_in):
static.ARQ_RPT_RECEIVED = True
state improvements really ugly debugging output inside....
2021-03-15 18:43:04 +00:00
static.ARQ_DATA_CHANNEL_LAST_RECEIVED = int(time.time()) # we need to update our timeout timestamp
renamed arq module to data_handler
2021-02-24 13:22:28 +00:00
static.ARQ_RPT_FRAMES = []
smaller PEP8 cleanup
2021-03-12 13:14:36 +00:00
renamed arq module to data_handler
2021-02-24 13:22:28 +00:00
missing_area = bytes(data_in[1:9])
smaller PEP8 cleanup
2021-03-12 13:14:36 +00:00
for i in range(0, 6, 2):
if not missing_area[i:i + 2].endswith(b'\x00\x00'):
missing = missing_area[i:i + 2]
static.ARQ_RPT_FRAMES.insert(0, missing)
# ############################################################################################################
first working data channel
2021-02-28 14:24:14 +00:00
# ARQ DATA CHANNEL HANDLER
smaller PEP8 cleanup
2021-03-12 13:14:36 +00:00
# ############################################################################################################
first working data channel
2021-02-28 14:24:14 +00:00
async def arq_open_data_channel():
smaller PEP8 cleanup
2021-03-12 13:14:36 +00:00
logging.info("DATA [" + str(static.MYCALLSIGN, 'utf-8') + "]>> <<[" + str(static.DXCALLSIGN, 'utf-8') + "] [BER." + str(static.BER) + "]")
cleanup and removed connection feature CONNECT / DISCONNECT / KEEP ALIVE causes too much problems regarding to speed, efficiency and stability
2021-03-16 09:55:48 +00:00
first working data channel
2021-02-28 14:24:14 +00:00
static.ARQ_DATA_CHANNEL_MODE = 12
first try with data channel timeout and keep alive
2021-03-12 15:18:41 +00:00
static.ARQ_DATA_CHANNEL_LAST_RECEIVED = int(time.time())
first working data channel
2021-02-28 14:24:14 +00:00
while static.CHANNEL_STATE == 'SENDING_SIGNALLING':
time.sleep(0.01)
smaller PEP8 cleanup
2021-03-12 13:14:36 +00:00
first working data channel
2021-02-28 14:24:14 +00:00
connection_frame = bytearray(14)
connection_frame[:1] = bytes([225])
connection_frame[1:2] = static.DXCALLSIGN_CRC8
connection_frame[2:3] = static.MYCALLSIGN_CRC8
cleanup and removed connection feature CONNECT / DISCONNECT / KEEP ALIVE causes too much problems regarding to speed, efficiency and stability
2021-03-16 09:55:48 +00:00
connection_frame[3:9] = static.MYCALLSIGN
first working data channel
2021-02-28 14:24:14 +00:00
connection_frame[12:13] = bytes([static.ARQ_DATA_CHANNEL_MODE])
test with wait for data channel
2021-03-10 09:30:49 +00:00
first attempt with ASYNCIO instead of THREADING
2021-02-28 15:46:18 +00:00
modem.transmit_signalling(connection_frame)
test with wait for data channel
2021-03-10 09:30:49 +00:00
while static.CHANNEL_STATE == 'SENDING_SIGNALLING':
smaller PEP8 cleanup
2021-03-12 13:14:36 +00:00
time.sleep(0.01)
first working data channel
2021-02-28 14:24:14 +00:00
def arq_received_data_channel_opener(data_in):
cleanup and removed connection feature CONNECT / DISCONNECT / KEEP ALIVE causes too much problems regarding to speed, efficiency and stability
2021-03-16 09:55:48 +00:00
static.DXCALLSIGN_CRC8 = bytes(data_in[2:3]).rstrip(b'\x00')
static.DXCALLSIGN = bytes(data_in[3:9]).rstrip(b'\x00')
datatype to heard stations
2021-03-16 14:21:58 +00:00
helpers.add_to_heard_stations(static.DXCALLSIGN, 'DATA-CHANNEL')
smaller PEP8 cleanup
2021-03-12 13:14:36 +00:00
logging.info("DATA [" + str(static.MYCALLSIGN, 'utf-8') + "]>> <<[" + str(static.DXCALLSIGN, 'utf-8') + "] [BER." + str(static.BER) + "]")
first try with data channel timeout and keep alive
2021-03-12 15:18:41 +00:00
cleanup and removed connection feature CONNECT / DISCONNECT / KEEP ALIVE causes too much problems regarding to speed, efficiency and stability
2021-03-16 09:55:48 +00:00
static.ARQ_STATE = 'DATA'
first try with data channel timeout and keep alive
2021-03-12 15:18:41 +00:00
static.TNC_STATE = 'BUSY'
first working data channel
2021-02-28 14:24:14 +00:00
static.ARQ_SEND_KEEP_ALIVE = False
static.ARQ_DATA_CHANNEL_MODE = int.from_bytes(bytes(data_in[12:13]), "big")
first try with data channel timeout and keep alive
2021-03-12 15:18:41 +00:00
static.ARQ_DATA_CHANNEL_LAST_RECEIVED = int(time.time())
smaller PEP8 cleanup
2021-03-12 13:14:36 +00:00
first working data channel
2021-02-28 14:24:14 +00:00
connection_frame = bytearray(14)
connection_frame[:1] = bytes([226])
connection_frame[1:2] = static.DXCALLSIGN_CRC8
connection_frame[2:3] = static.MYCALLSIGN_CRC8
datatype to heard stations
2021-03-16 14:21:58 +00:00
connection_frame[3:9] = static.MYCALLSIGN
first working data channel
2021-02-28 14:24:14 +00:00
connection_frame[12:13] = bytes([static.ARQ_DATA_CHANNEL_MODE])
cleanup and removed connection feature CONNECT / DISCONNECT / KEEP ALIVE causes too much problems regarding to speed, efficiency and stability
2021-03-16 09:55:48 +00:00
first working data channel
2021-02-28 14:24:14 +00:00
test with wait for data channel
2021-03-10 09:30:49 +00:00
modem.transmit_signalling(connection_frame)
first working data channel
2021-02-28 14:24:14 +00:00
while static.CHANNEL_STATE == 'SENDING_SIGNALLING':
time.sleep(0.01)
smaller PEP8 cleanup
2021-03-12 13:14:36 +00:00
cleanup and removed connection feature CONNECT / DISCONNECT / KEEP ALIVE causes too much problems regarding to speed, efficiency and stability
2021-03-16 09:55:48 +00:00
logging.info("DATA [" + str(static.MYCALLSIGN, 'utf-8') + "]>>|<<[" + str(static.DXCALLSIGN, 'utf-8') + "] [BER." + str(static.BER) + "]")
first working data channel
2021-02-28 14:24:14 +00:00
static.CHANNEL_STATE = 'RECEIVING_DATA'
cleanup and removed connection feature CONNECT / DISCONNECT / KEEP ALIVE causes too much problems regarding to speed, efficiency and stability
2021-03-16 09:55:48 +00:00
# and now we are going to "RECEIVING_DATA" mode....
smaller PEP8 cleanup
2021-03-12 13:14:36 +00:00
first working data channel
2021-02-28 14:24:14 +00:00
def arq_received_channel_is_open(data_in):
datatype to heard stations
2021-03-16 14:21:58 +00:00
static.DXCALLSIGN_CRC8 = bytes(data_in[2:3]).rstrip(b'\x00')
static.DXCALLSIGN = bytes(data_in[3:9]).rstrip(b'\x00')
helpers.add_to_heard_stations(static.DXCALLSIGN, 'DATA-CHANNEL')
first try with data channel timeout and keep alive
2021-03-12 15:18:41 +00:00
static.ARQ_DATA_CHANNEL_LAST_RECEIVED = int(time.time())
smaller PEP8 cleanup
2021-03-12 13:14:36 +00:00
datatype to heard stations
2021-03-16 14:21:58 +00:00
first working data channel
2021-02-28 14:24:14 +00:00
if static.ARQ_DATA_CHANNEL_MODE == int.from_bytes(bytes(data_in[12:13]), "big"):
smaller PEP8 cleanup
2021-03-12 13:14:36 +00:00
logging.info("DATA [" + str(static.MYCALLSIGN, 'utf-8') + "]>>|<<[" + str(static.DXCALLSIGN, 'utf-8') + "] [BER." + str(static.BER) + "]")
cleanup and removed connection feature CONNECT / DISCONNECT / KEEP ALIVE causes too much problems regarding to speed, efficiency and stability
2021-03-16 09:55:48 +00:00
static.ARQ_STATE = 'DATA'
first working data channel
2021-02-28 14:24:14 +00:00
static.ARQ_READY_FOR_DATA = True
first try with data channel timeout and keep alive
2021-03-12 15:18:41 +00:00
static.ARQ_DATA_CHANNEL_LAST_RECEIVED = int(time.time())
cleanup and removed connection feature CONNECT / DISCONNECT / KEEP ALIVE causes too much problems regarding to speed, efficiency and stability
2021-03-16 09:55:48 +00:00
else:
print("wrong mode received...")
first working data channel
2021-02-28 14:24:14 +00:00
smaller PEP8 cleanup
2021-03-12 13:14:36 +00:00
# ############################################################################################################
first connect, cq and ping handler
2021-02-24 15:47:52 +00:00
# PING HANDLER
smaller PEP8 cleanup
2021-03-12 13:14:36 +00:00
# ############################################################################################################
first async / non block transmission really ugly at this point. we need a lot of code cleanup.
2021-03-09 19:56:17 +00:00
async def transmit_ping(callsign):
heard stations buffer
2021-03-11 19:04:31 +00:00
static.DXCALLSIGN = bytes(callsign, 'utf-8').rstrip(b'\x00')
selective repeating first try
2021-03-09 10:05:59 +00:00
static.DXCALLSIGN_CRC8 = helpers.get_crc_8(static.DXCALLSIGN)
smaller PEP8 cleanup
2021-03-12 13:14:36 +00:00
logging.info("PING [" + str(static.MYCALLSIGN, 'utf-8') + "] >>> [" + str(static.DXCALLSIGN, 'utf-8') + "] [BER." + str(static.BER) + "]")
fixed wrong callsign for ping
2021-03-07 15:41:02 +00:00
ping_frame = bytearray(14)
ping_frame[:1] = bytes([210])
ping_frame[1:2] = static.DXCALLSIGN_CRC8
ping_frame[2:3] = static.MYCALLSIGN_CRC8
ping_frame[3:9] = static.MYCALLSIGN
renamed arq module to data_handler
2021-02-24 13:22:28 +00:00
first working data channel
2021-02-28 14:24:14 +00:00
# wait while sending....
first attempt with ASYNCIO instead of THREADING
2021-02-28 15:46:18 +00:00
modem.transmit_signalling(ping_frame)
test with wait for data channel
2021-03-10 09:30:49 +00:00
while static.CHANNEL_STATE == 'SENDING_SIGNALLING':
smaller PEP8 cleanup
2021-03-12 13:14:36 +00:00
time.sleep(0.01)
renamed arq module to data_handler
2021-02-24 13:22:28 +00:00
def received_ping(data_in):
first working data channel
2021-02-28 14:24:14 +00:00
heard stations buffer
2021-03-11 19:04:31 +00:00
static.DXCALLSIGN_CRC8 = bytes(data_in[2:3]).rstrip(b'\x00')
static.DXCALLSIGN = bytes(data_in[3:9]).rstrip(b'\x00')
datatype to heard stations
2021-03-16 14:21:58 +00:00
helpers.add_to_heard_stations(static.DXCALLSIGN, 'PING')
smaller PEP8 cleanup
2021-03-12 13:14:36 +00:00
logging.info("PING [" + str(static.MYCALLSIGN, 'utf-8') + "] <<< [" + str(static.DXCALLSIGN, 'utf-8') + "] [BER." + str(static.BER) + "]")
fixed wrong callsign for ping
2021-03-07 15:41:02 +00:00
ping_frame = bytearray(14)
ping_frame[:1] = bytes([211])
ping_frame[1:2] = static.DXCALLSIGN_CRC8
ping_frame[2:3] = static.MYCALLSIGN_CRC8
ping_frame[3:9] = static.MYCALLSIGN
smaller PEP8 cleanup
2021-03-12 13:14:36 +00:00
first working data channel
2021-02-28 14:24:14 +00:00
# wait while sending....
first attempt with ASYNCIO instead of THREADING
2021-02-28 15:46:18 +00:00
modem.transmit_signalling(ping_frame)
test with wait for data channel
2021-03-10 09:30:49 +00:00
while static.CHANNEL_STATE == 'SENDING_SIGNALLING':
smaller PEP8 cleanup
2021-03-12 13:14:36 +00:00
time.sleep(0.01)
renamed arq module to data_handler
2021-02-24 13:22:28 +00:00
def received_ping_ack(data_in):
fixed wrong callsign for ping
2021-03-07 15:41:02 +00:00
heard stations buffer
2021-03-11 19:04:31 +00:00
static.DXCALLSIGN_CRC8 = bytes(data_in[2:3]).rstrip(b'\x00')
static.DXCALLSIGN = bytes(data_in[3:9]).rstrip(b'\x00')
datatype to heard stations
2021-03-16 14:21:58 +00:00
helpers.add_to_heard_stations(static.DXCALLSIGN, 'PING-ACK')
smaller PEP8 cleanup
2021-03-12 13:14:36 +00:00
logging.info("PING [" + str(static.DXCALLSIGN, 'utf-8') + "] >|< [" + str(static.MYCALLSIGN, 'utf-8') + "] [BER." + str(static.BER) + "]")
first connect, cq and ping handler
2021-02-24 15:47:52 +00:00
static.TNC_STATE = 'IDLE'
smaller PEP8 cleanup
2021-03-12 13:14:36 +00:00
# ############################################################################################################
first connect, cq and ping handler
2021-02-24 15:47:52 +00:00
# BROADCAST HANDLER
smaller PEP8 cleanup
2021-03-12 13:14:36 +00:00
# ############################################################################################################
code cleanup
2021-02-28 16:28:07 +00:00
async def transmit_cq():
renamed arq module to data_handler
2021-02-24 13:22:28 +00:00
logging.info("CQ CQ CQ")
smaller PEP8 cleanup
2021-03-12 13:14:36 +00:00
CQ now with callsign detection
2021-03-09 09:00:20 +00:00
cq_frame = bytearray(14)
cq_frame[:1] = bytes([200])
updated other signalling frams with callsign crc8
2021-03-09 13:01:54 +00:00
cq_frame[1:2] = b'\x01'
CQ now with callsign detection
2021-03-09 09:00:20 +00:00
cq_frame[2:3] = static.MYCALLSIGN_CRC8
cq_frame[3:9] = static.MYCALLSIGN
smaller PEP8 cleanup
2021-03-12 13:14:36 +00:00
for i in range(0, 3):
CQ now with callsign detection
2021-03-09 09:00:20 +00:00
modem.transmit_signalling(cq_frame)
test with wait for data channel
2021-03-10 09:30:49 +00:00
while static.CHANNEL_STATE == 'SENDING_SIGNALLING':
time.sleep(0.01)
smaller PEP8 cleanup
2021-03-12 13:14:36 +00:00
CQ now with callsign detection
2021-03-09 09:00:20 +00:00
def received_cq(data_in):
selective repeating first try
2021-03-09 10:05:59 +00:00
static.DXCALLSIGN = b''
static.DXCALLSIGN_CRC8 = b''
smaller PEP8 cleanup
2021-03-12 13:14:36 +00:00
logging.info("CQ RCVD [" + str(bytes(data_in[3:9]), 'utf-8') + "] [BER." + str(static.BER) + "]")
# here we add the received station to the heard stations buffer
heard stations buffer
2021-03-11 19:04:31 +00:00
dxcallsign = bytes(data_in[3:9]).rstrip(b'\x00')
datatype to heard stations
2021-03-16 14:21:58 +00:00
helpers.add_to_heard_stations(dxcallsign, 'CQ CQ CQ')
smaller PEP8 cleanup
2021-03-12 13:14:36 +00:00
beacon placeholder and connect optimization
2021-02-24 16:29:08 +00:00
code cleanup
2021-02-28 16:28:07 +00:00
async def transmit_beacon():
beacon placeholder and connect optimization
2021-02-24 16:29:08 +00:00
logging.info("BEACON")
frame_type = bytes([230])
print(frame_type)
beacon_frame = frame_type + static.MYCALLSIGN
fixed data type for ARQ_STATE
2021-02-24 16:41:14 +00:00
while static.TNC_STATE == 'BEACON':
code cleanup
2021-02-28 16:28:07 +00:00
await asyncio.sleep(60)
modem.transmit_signalling(beacon_frame)
test with wait for data channel
2021-03-10 09:30:49 +00:00
while static.CHANNEL_STATE == 'SENDING_SIGNALLING':
time.sleep(0.01)
smaller PEP8 cleanup
2021-03-12 13:14:36 +00:00
def received_beacon():
static.DXCALLSIGN = b''
static.DXCALLSIGN_CRC8 = b''
logging.info("BEACON RCVD [" + str(bytes(data_in[3:9]), 'utf-8') + "] [BER." + str(static.BER) + "]")
# here we add the received station to the heard stations buffer
dxcallsign = bytes(data_in[3:9]).rstrip(b'\x00')
datatype to heard stations
2021-03-16 14:21:58 +00:00
helpers.add_to_heard_stations(dxcallsign, 'BEACON')
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