FreeDATA/sock.py

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Python
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#!/usr/bin/env python3
# -*- coding: utf-8 -*-
"""
Created on Fri Dec 25 21:25:14 2020
@author: DJ2LS
"""
import socketserver
import threading
import logging
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import json
import asyncio
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import time
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import static
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import data_handler
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import helpers
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class CMDTCPRequestHandler(socketserver.BaseRequestHandler):
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def handle(self):
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print("Client connected...")
# loop through socket buffer until timeout is reached. then close buffer
socketTimeout = time.time() + 3
while socketTimeout > time.time():
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time.sleep(0.01)
encoding = 'utf-8'
#data = str(self.request.recv(1024), 'utf-8')
data = bytes()
# we need to loop through buffer until end of chunk is reached or timeout occured
while True and socketTimeout > time.time():
chunk = self.request.recv(1024) # .strip()
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data += chunk
if chunk.endswith(b'\n'):
break
data = data[:-1] # remove b'\n'
data = str(data, 'utf-8')
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if len(data) > 0:
socketTimeout = time.time() + static.SOCKET_TIMEOUT
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# convert data to json object
# we need to do some error handling in case of socket timeout
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try:
received_json = json.loads(data)
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print(received_json)
except:
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received_json = ''
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# GET COMMANDS
# "command" : "..."
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# SET COMMANDS
# "command" : "..."
# "parameter" : " ..."
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# DATA COMMANDS
# "command" : "..."
# "type" : "..."
# "dxcallsign" : "..."
# "data" : "..."
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try:
# SOCKETTEST ---------------------------------------------------
#if data == 'SOCKETTEST':
if received_json["command"] == "SOCKETTEST":
#cur_thread = threading.current_thread()
response = bytes("WELL DONE! YOU ARE ABLE TO COMMUNICATE WITH THE TNC", encoding)
self.request.sendall(response)
# CQ CQ CQ -----------------------------------------------------
#if data == 'CQCQCQ':
if received_json["command"] == "CQCQCQ":
asyncio.run(data_handler.transmit_cq())
# PING ----------------------------------------------------------
#if data.startswith('PING:'):
if received_json["command"] == "PING":
# send ping frame and wait for ACK
dxcallsign = received_json["dxcallsign"]
asyncio.run(data_handler.transmit_ping(dxcallsign))
# ARQ CONNECT TO CALLSIGN ----------------------------------------
#if data.startswith('ARQ:CONNECT:'):
#if received_json["command"] == "ARQ:CONNECT":
#
# dxcallsign = received_json["dxcallsign"]
# static.DXCALLSIGN = bytes(dxcallsign, 'utf-8')
# static.DXCALLSIGN_CRC8 = helpers.get_crc_8(static.DXCALLSIGN)
# if static.ARQ_STATE == 'CONNECTED':
# # here we could disconnect
# pass
# if static.TNC_STATE == 'IDLE':
# asyncio.run(data_handler.arq_connect())
# ARQ DISCONNECT FROM CALLSIGN ----------------------------------------
#if received_json["command"] == "ARQ:DISCONNECT":
# asyncio.run(data_handler.arq_disconnect())
if received_json["type"] == 'ARQ' and received_json["command"] == "OPEN_DATA_CHANNEL": # and static.ARQ_STATE == 'CONNECTED':
static.ARQ_READY_FOR_DATA = False
static.TNC_STATE = 'BUSY'
dxcallsign = received_json["dxcallsign"]
static.DXCALLSIGN = bytes(dxcallsign, 'utf-8')
static.DXCALLSIGN_CRC8 = helpers.get_crc_8(static.DXCALLSIGN)
asyncio.run(data_handler.arq_open_data_channel())
if received_json["type"] == 'ARQ' and received_json["command"] == "DATA":# and static.ARQ_READY_FOR_DATA == True: # and static.ARQ_STATE == 'CONNECTED' :
static.TNC_STATE = 'BUSY'
#on a new transmission we reset the timer
static.ARQ_START_OF_TRANSMISSION = int(time.time())
dxcallsign = received_json["dxcallsign"]
static.DXCALLSIGN = bytes(dxcallsign, 'utf-8')
static.DXCALLSIGN_CRC8 = helpers.get_crc_8(static.DXCALLSIGN)
data_out = bytes(received_json["data"], 'utf-8')
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mode = int(received_json["mode"])
n_frames = int(received_json["n_frames"])
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#ARQ_DATA_THREAD = threading.Thread(target=data_handler.arq_transmit, args=[data_out], name="ARQ_DATA")
#ARQ_DATA_THREAD.start()
ARQ_DATA_THREAD = threading.Thread(target=data_handler.open_dc_and_transmit, args=[data_out, mode, n_frames], name="ARQ_DATA")
ARQ_DATA_THREAD.start()
# asyncio.run(data_handler.arq_transmit(data_out))
# SETTINGS AND STATUS ---------------------------------------------
if received_json["type"] == 'SET' and received_json["command"] == 'MYCALLSIGN':
callsign = received_json["parameter"]
if bytes(callsign, encoding) == b'':
self.request.sendall(b'INVALID CALLSIGN')
else:
static.MYCALLSIGN = bytes(callsign, encoding)
static.MYCALLSIGN_CRC8 = helpers.get_crc_8(static.MYCALLSIGN)
logging.info("CMD | MYCALLSIGN: " + str(static.MYCALLSIGN))
if received_json["type"] == 'SET' and received_json["command"] == 'MYGRID':
mygrid = received_json["parameter"]
if bytes(mygrid, encoding) == b'':
self.request.sendall(b'INVALID GRID')
else:
static.MYGRID = bytes(mygrid, encoding)
logging.info("CMD | MYGRID: " + str(static.MYGRID))
if received_json["type"] == 'GET' and received_json["command"] == 'STATION_INFO':
output = {
"COMMAND": "STATION_INFO",
"MY_CALLSIGN": str(static.MYCALLSIGN, encoding),
"DX_CALLSIGN": str(static.DXCALLSIGN, encoding),
"DX_GRID": str(static.DXGRID, encoding)
}
jsondata = json.dumps(output)
self.request.sendall(bytes(jsondata, encoding))
if received_json["type"] == 'GET' and received_json["command"] == 'TNC_STATE':
output = {
"COMMAND": "TNC_STATE",
"PTT_STATE": str(static.PTT_STATE),
"CHANNEL_STATE": str(static.CHANNEL_STATE),
"TNC_STATE": str(static.TNC_STATE),
"ARQ_STATE": str(static.ARQ_STATE),
"AUDIO_RMS": str(static.AUDIO_RMS),
"BER": str(static.BER),
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"SNR": str(static.SNR),
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"FREQUENCY" : str(static.HAMLIB_FREQUENCY),
"MODE" : str(static.HAMLIB_MODE),
"BANDWITH" : str(static.HAMLIB_BANDWITH)
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}
jsondata = json.dumps(output)
self.request.sendall(bytes(jsondata, encoding))
if received_json["type"] == 'GET' and received_json["command"] == 'DATA_STATE':
output = {
"COMMAND": "DATA_STATE",
"RX_BUFFER_LENGTH": str(len(static.RX_BUFFER)),
"TX_N_MAX_RETRIES": str(static.TX_N_MAX_RETRIES),
"ARQ_TX_N_FRAMES_PER_BURST": str(static.ARQ_TX_N_FRAMES_PER_BURST),
"ARQ_TX_N_BURSTS": str(static.ARQ_TX_N_BURSTS),
"ARQ_TX_N_CURRENT_ARQ_FRAME": str(int.from_bytes(bytes(static.ARQ_TX_N_CURRENT_ARQ_FRAME), "big")),
"ARQ_TX_N_TOTAL_ARQ_FRAMES": str(int.from_bytes(bytes(static.ARQ_TX_N_TOTAL_ARQ_FRAMES), "big")),
"ARQ_RX_FRAME_N_BURSTS": str(static.ARQ_RX_FRAME_N_BURSTS),
"ARQ_RX_N_CURRENT_ARQ_FRAME": str(static.ARQ_RX_N_CURRENT_ARQ_FRAME),
"ARQ_N_ARQ_FRAMES_PER_DATA_FRAME": str(static.ARQ_N_ARQ_FRAMES_PER_DATA_FRAME)
}
jsondata = json.dumps(output)
self.request.sendall(bytes(jsondata, encoding))
if received_json["type"] == 'GET' and received_json["command"] == 'HEARD_STATIONS':
output = []
for i in range(0, len(static.HEARD_STATIONS)):
output.append({"COMMAND": "HEARD_STATIONS", "CALLSIGN": str(static.HEARD_STATIONS[i][0], 'utf-8'),"DXGRID": str(static.HEARD_STATIONS[i][1], 'utf-8'), "TIMESTAMP": static.HEARD_STATIONS[i][2], "DATATYPE": static.HEARD_STATIONS[i][3]})
jsondata = json.dumps(output)
self.request.sendall(bytes(jsondata, encoding))
if received_json["type"] == 'GET' and received_json["command"] == 'RX_BUFFER':
data = data.split('GET:RX_BUFFER:')
bufferposition = int(data[1]) - 1
if bufferposition == -1:
if len(static.RX_BUFFER) > 0:
self.request.sendall(static.RX_BUFFER[-1])
if bufferposition <= len(static.RX_BUFFER) > 0:
self.request.sendall(bytes(static.RX_BUFFER[bufferposition]))
if received_json["type"] == 'SET' and received_json["command"] == 'DEL_RX_BUFFER':
static.RX_BUFFER = []
#exception, if JSON cant be decoded
except:
print("Wrong command")
print("Client disconnected...")
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def start_cmd_socket():
try:
logging.info("SRV | STARTING TCP/IP SOCKET FOR CMD ON PORT: " + str(static.PORT))
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socketserver.TCPServer.allow_reuse_address = True # https://stackoverflow.com/a/16641793
cmdserver = socketserver.TCPServer((static.HOST, static.PORT), CMDTCPRequestHandler)
cmdserver.serve_forever()
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finally:
cmdserver.server_close()