FreeDATA/tnc/daemon.py

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#!/usr/bin/python3
# -*- coding: utf-8 -*-
"""
Created on Tue Dec 22 16:58:45 2020
@author: DJ2LS
"""
import argparse
import threading
import socketserver
import pyaudio
import time
import json
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import subprocess
import os
import static
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import psutil
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#PORT = 3001
#TNCPROCESS = 0
#TNCSTARTED = False
#p = pyaudio.PyAudio()
#info = p.get_host_api_info_by_index(0)
#numdevices = info.get('deviceCount')
#for each audio device, determine if is an input or an output and add it to the appropriate list and dictionary
#for i in range (0,numdevices):
# if p.get_device_info_by_host_api_device_index(0,i).get('maxInputChannels')>0:
# print("Input Device id ", i, " - ", p.get_device_info_by_host_api_device_index(0,i).get('name'))#
#
# if p.get_device_info_by_host_api_device_index(0,i).get('maxOutputChannels')>0:
# print("Output Device id ", i, " - ", p.get_device_info_by_host_api_device_index(0,i).get('name'))
def start_daemon():
try:
print("SRV | STARTING TCP/IP SOCKET FOR CMD ON PORT: " + str(PORT))
socketserver.TCPServer.allow_reuse_address = True # https://stackoverflow.com/a/16641793
daemon = socketserver.TCPServer(('0.0.0.0', PORT), CMDTCPRequestHandler)
daemon.serve_forever()
finally:
daemon.server_close()
class CMDTCPRequestHandler(socketserver.BaseRequestHandler):
def handle(self):
print("Client connected...")
# loop through socket buffer until timeout is reached. then close buffer
socketTimeout = time.time() + 3
while socketTimeout > time.time():
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()
data += chunk
if chunk.endswith(b'\n'):
break
data = data[:-1] # remove b'\n'
data = str(data, 'utf-8')
#print(data)
if len(data) > 0:
socketTimeout = time.time() + 3
# convert data to json object
# we need to do some error handling in case of socket timeout
try:
received_json = json.loads(data)
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print(received_json)
except:
received_json = ''
# GET COMMANDS
# "command" : "..."
# SET COMMANDS
# "command" : "..."
# "parameter" : " ..."
# DATA COMMANDS
# "command" : "..."
# "type" : "..."
# "dxcallsign" : "..."
# "data" : "..."
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# print(received_json)
#print(received_json["type"])
#print(received_json["command"])
try:
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print(static.TNCSTARTED)
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if received_json["type"] == 'SET' and received_json["command"] == 'STARTTNC' and not static.TNCSTARTED:
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rx_audio = received_json["parameter"][0]["rx_audio"]
tx_audio = received_json["parameter"][0]["tx_audio"]
deviceid = received_json["parameter"][0]["deviceid"]
deviceport = received_json["parameter"][0]["deviceport"]
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serialspeed = received_json["parameter"][0]["serialspeed"]
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ptt = received_json["parameter"][0]["ptt"]
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print("STARTING TNC !!!!!")
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print(received_json["parameter"][0])
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#os.system("python3 main.py --rx 3 --tx 3 --deviceport /dev/ttyUSB0 --deviceid 2028")
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p = subprocess.Popen("exec python3 main.py --rx "+ str(rx_audio) +" --tx "+ str(tx_audio) +" --deviceport "+ str(deviceport) +" --deviceid "+ str(deviceid) + " --serialspeed "+ str(serialspeed) + " --ptt "+ str(ptt), shell=True)
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static.TNCPROCESS = p#.pid
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#print(parameter)
# print(static.TNCPROCESS)
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static.TNCSTARTED = True
if received_json["type"] == 'SET' and received_json["command"] == 'STOPTNC':
parameter = received_json["parameter"]
static.TNCPROCESS.kill()
print("KILLING PROCESS ------------")
#os.kill(static.TNCPROCESS, signal.SIGKILL)
static.TNCSTARTED = False
if received_json["type"] == 'GET' and received_json["command"] == 'DAEMON_STATE':
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data = {'COMMAND' : 'DAEMON_STATE', 'DAEMON_STATE' : [], 'INPUT_DEVICES': [], 'OUTPUT_DEVICES': [],"CPU": str(psutil.cpu_percent()),"RAM": str(psutil.virtual_memory().percent), "VERSION": "0.1-prototype"}
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if static.TNCSTARTED:
data["DAEMON_STATE"].append({"STATUS": "running"})
else:
data["DAEMON_STATE"].append({"STATUS": "stopped"})
p = pyaudio.PyAudio()
for i in range(0, p.get_device_count()):
maxInputChannels = p.get_device_info_by_host_api_device_index(0,i).get('maxInputChannels')
maxOutputChannels = p.get_device_info_by_host_api_device_index(0,i).get('maxOutputChannels')
name = p.get_device_info_by_host_api_device_index(0,i).get('name')
if maxInputChannels > 0:
data["INPUT_DEVICES"].append({"ID": i, "NAME" : name})
if maxOutputChannels > 0:
data["OUTPUT_DEVICES"].append({"ID": i, "NAME" : name})
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#print(data)
jsondata = json.dumps(data)
self.request.sendall(bytes(jsondata, encoding))
#exception, if JSON cant be decoded
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except Exception as e:
print('PROGRAM ERROR: %s' %str(e))
print("Wrong command")
print("Client disconnected...")
if __name__ == '__main__':
# --------------------------------------------GET PARAMETER INPUTS
PARSER = argparse.ArgumentParser(description='Simons TEST TNC')
PARSER.add_argument('--port', dest="socket_port", default=3001, help="Socket port", type=int)
ARGS = PARSER.parse_args()
PORT = ARGS.socket_port
# --------------------------------------------START CMD SERVER
DAEMON_THREAD = threading.Thread(target=start_daemon, name="daemon")
DAEMON_THREAD.start()