FreeDATA/tnc/sock.py

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#!/usr/bin/env python3
# -*- coding: utf-8 -*-
"""
Created on Fri Dec 25 21:25:14 2020
@author: DJ2LS
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# GET COMMANDS
# "command" : "..."
# SET COMMANDS
# "command" : "..."
# "parameter" : " ..."
# DATA COMMANDS
# "command" : "..."
# "type" : "..."
# "dxcallsign" : "..."
# "data" : "..."
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"""
import socketserver
import threading
import logging
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import ujson as json
#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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import sys
import os
class ThreadedTCPServer(socketserver.ThreadingMixIn, socketserver.TCPServer):
pass
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class ThreadedTCPRequestHandler(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
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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()
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# 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(71) # we keep amount of bytes short
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data += chunk
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# or chunk.endswith(b'\n'):
if chunk.endswith(b'}\n') or chunk.endswith(b'}'):
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break
data = data[:-1] # remove b'\n'
data = str(data, 'utf-8')
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 or decoding issue
try:
# only read first line of string. multiple lines will cause an json error
# this occurs possibly, if we are getting data too fast
# data = data.splitlines()[0]
# IndexError: list index out of range
data = data.splitlines()[0]
received_json = json.loads(data)
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# except ValueError as e:
# print("++++++++++++ START OF JSON ERROR +++++++++++++++++++++++")
# print(e)
# print("-----------------------------------")
# print(data)
# print("++++++++++++ END OF JSON ERROR +++++++++++++++++++++++++")
# received_json = {}
# break
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# try:
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# CQ CQ CQ -----------------------------------------------------
if received_json["command"] == "CQCQCQ":
#socketTimeout = 0
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# asyncio.run(data_handler.transmit_cq())
CQ_THREAD = threading.Thread(
target=data_handler.transmit_cq, args=[], name="CQ")
CQ_THREAD.start()
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# PING ----------------------------------------------------------
if received_json["type"] == 'PING' and received_json["command"] == "PING":
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# send ping frame and wait for ACK
dxcallsign = received_json["dxcallsign"]
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# asyncio.run(data_handler.transmit_ping(dxcallsign))
PING_THREAD = threading.Thread(
target=data_handler.transmit_ping, args=[dxcallsign], name="CQ")
PING_THREAD.start()
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# and static.ARQ_READY_FOR_DATA == True: # and static.ARQ_STATE == 'CONNECTED' :
if received_json["type"] == 'ARQ' and received_json["command"] == "sendFile":
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static.TNC_STATE = 'BUSY'
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# on a new transmission we reset the timer
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static.ARQ_START_OF_TRANSMISSION = int(time.time())
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dxcallsign = received_json["dxcallsign"]
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mode = int(received_json["mode"])
n_frames = int(received_json["n_frames"])
filename = received_json["filename"]
filetype = received_json["filetype"]
data = received_json["data"]
checksum = received_json["checksum"]
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static.DXCALLSIGN = bytes(dxcallsign, 'utf-8')
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static.DXCALLSIGN_CRC8 = helpers.get_crc_8(
static.DXCALLSIGN)
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#dataframe = '{"filename": "'+ filename + '", "filetype" : "' + filetype + '", "data" : "' + data + '", "checksum" : "' + checksum + '"}'
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rawdata = {"filename": filename, "filetype": filetype,"data": data, "checksum": checksum}
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#dataframe = {filename: filename}
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#data_out = bytes(received_json["data"], 'utf-8')
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dataframe = json.dumps(rawdata)
print(dataframe)
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data_out = bytes(dataframe, 'utf-8')
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print(data_out)
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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)
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static.MYCALLSIGN_CRC8 = helpers.get_crc_8(
static.MYCALLSIGN)
logging.info("CMD | MYCALLSIGN: " +
str(static.MYCALLSIGN))
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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))
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if received_json["type"] == 'GET' and received_json["command"] == 'STATION_INFO':
output = {
"COMMAND": "STATION_INFO",
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"TIMESTAMP": received_json["timestamp"],
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"MY_CALLSIGN": str(static.MYCALLSIGN, encoding),
"DX_CALLSIGN": str(static.DXCALLSIGN, encoding),
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"DX_GRID": str(static.DXGRID, encoding),
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"EOF": "EOF",
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}
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jsondata = json.dumps(output)
self.request.sendall(bytes(jsondata, encoding))
if received_json["type"] == 'GET' and received_json["command"] == 'TNC_STATE':
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output = {
"COMMAND": "TNC_STATE",
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"TIMESTAMP": received_json["timestamp"],
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"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),
"FFT": str(static.FFT),
"SCATTER": static.SCATTER,
"RX_BUFFER_LENGTH": str(len(static.RX_BUFFER)),
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"ARQ_BYTES_PER_MINUTE": str(static.ARQ_BYTES_PER_MINUTE),
"ARQ_BYTES_PER_MINUTE_BURST": str(static.ARQ_BYTES_PER_MINUTE_BURST),
"ARQ_TRANSMISSION_PERCENT": str(static.ARQ_TRANSMISSION_PERCENT),
"TOTAL_BYTES": str(static.TOTAL_BYTES),
"STATIONS": [],
"EOF": "EOF",
}
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for i in range(0, len(static.HEARD_STATIONS)):
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output["STATIONS"].append({"DXCALLSIGN": 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], "SNR": static.HEARD_STATIONS[i][4]})
try:
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jsondata = json.dumps(output)
except ValueError as e:
print(e)
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try:
self.request.sendall(bytes(jsondata, encoding))
except Exception as e:
print(e)
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if received_json["type"] == 'GET' and received_json["command"] == 'RX_BUFFER':
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output = {
"COMMAND": "RX_BUFFER",
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"DATA-ARRAY": [],
"EOF": "EOF",
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}
for i in range(0, len(static.RX_BUFFER)):
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rawdata = json.loads(static.RX_BUFFER[i][3])
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output["DATA-ARRAY"].append({"DXCALLSIGN": str(static.RX_BUFFER[i][0], 'utf-8'), "DXGRID": str(static.RX_BUFFER[i][1], 'utf-8'), "TIMESTAMP": static.RX_BUFFER[i][2], "RXDATA": [rawdata]})
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jsondata = json.dumps(output)
self.request.sendall(bytes(jsondata, encoding))
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if received_json["type"] == 'SET' and received_json["command"] == 'DEL_RX_BUFFER':
static.RX_BUFFER = []
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# exception, if JSON cant be decoded
# except Exception as e:
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except:
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print("############ START OF ERROR #####################")
print("SOCKET COMMAND ERROR: " + data)
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e = sys.exc_info()[0]
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print(e)
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exc_type, exc_obj, exc_tb = sys.exc_info()
fname = os.path.split(exc_tb.tb_frame.f_code.co_filename)[1]
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print(exc_type, fname, exc_tb.tb_lineno)
print("############ END OF ERROR #######################")
print("reset of connection...")
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#socketTimeout = 0
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print("Client disconnected...")
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def start_cmd_socket():
try:
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logging.info(
"SRV | STARTING TCP/IP SOCKET FOR CMD ON PORT: " + str(static.PORT))
# https://stackoverflow.com/a/16641793
socketserver.TCPServer.allow_reuse_address = True
cmdserver = ThreadedTCPServer(
(static.HOST, static.PORT), ThreadedTCPRequestHandler)
server_thread = threading.Thread(target=cmdserver.serve_forever)
server_thread.daemon = True
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server_thread.start()
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except:
print("Socket error...")
e = sys.exc_info()[0]
print(e)
exc_type, exc_obj, exc_tb = sys.exc_info()
fname = os.path.split(exc_tb.tb_frame.f_code.co_filename)[1]
print(exc_type, fname, exc_tb.tb_lineno)