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FreeDATA/tnc/daemon.py
dj2ls 66a39b5368 fix audio device selection 
#96
2021-12-27 15:28:58 +01:00

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Python
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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 time
import os
import sys
import subprocess
import ujson as json
import psutil
import serial.tools.list_ports
import static
import crcengine
import re
import rig
import logging, structlog, log_handler
log_handler.setup_logging("daemon")
# get python version, which is needed later for determining installation path
python_version = str(sys.version_info[0]) + "." + str(sys.version_info[1])
structlog.get_logger("structlog").info("[DMN] Starting...", python=python_version)
####################################################
# https://stackoverflow.com/questions/7088672/pyaudio-working-but-spits-out-error-messages-each-time
# https://github.com/DJ2LS/FreeDATA/issues/22
# we need to have a look at this if we want to run this on Windows and MacOS !
# Currently it seems, this is a Linux-only problem
from ctypes import *
from contextlib import contextmanager
import pyaudio
ERROR_HANDLER_FUNC = CFUNCTYPE(None, c_char_p, c_int, c_char_p, c_int, c_char_p)
def py_error_handler(filename, line, function, err, fmt):
pass
c_error_handler = ERROR_HANDLER_FUNC(py_error_handler)
@contextmanager
def noalsaerr():
asound = cdll.LoadLibrary('libasound.so')
asound.snd_lib_error_set_handler(c_error_handler)
yield
asound.snd_lib_error_set_handler(None)
# with noalsaerr():
# p = pyaudio.PyAudio()
######################################################
# try importing hamlib
try:
# installation path for Ubuntu 20.04 LTS python modules
sys.path.append('/usr/local/lib/python'+ python_version +'/site-packages')
# installation path for Ubuntu 20.10 +
sys.path.append('/usr/local/lib/')
import Hamlib
# https://stackoverflow.com/a/4703409
hamlib_version = re.findall(r"[-+]?\d*\.?\d+|\d+", Hamlib.cvar.hamlib_version)
hamlib_version = float(hamlib_version[0])
min_hamlib_version = 4.1
if hamlib_version > min_hamlib_version:
structlog.get_logger("structlog").info("[DMN] Hamlib found", version=hamlib_version)
else:
structlog.get_logger("structlog").warning("[DMN] Hamlib outdated", found=hamlib_version, recommend=min_hamlib_version)
except Exception as e:
structlog.get_logger("structlog").critical("[DMN] Hamlib not found", error=e)
# load crc engine
crc_algorithm = crcengine.new('crc16-ccitt-false') # load crc8 library
def start_daemon():
try:
structlog.get_logger("structlog").info("[DMN] Starting TCP/IP socket", port=PORT)
# https://stackoverflow.com/a/16641793
socketserver.TCPServer.allow_reuse_address = True
daemon = socketserver.TCPServer(('0.0.0.0', PORT), CMDTCPRequestHandler)
daemon.serve_forever()
finally:
structlog.get_logger("structlog").warning("[DMN] Closing socket", port=PORT)
daemon.server_close()
class CMDTCPRequestHandler(socketserver.BaseRequestHandler):
def handle(self):
structlog.get_logger("structlog").debug("[DMN] Client connected", ip=self.client_address[0])
# 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(45)
data += chunk
# or chunk.endswith(b'\n'):
if chunk.endswith(b'}\n') or chunk.endswith(b'}'):
break
data = data[:-1] # remove b'\n'
data = str(data, 'utf-8')
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:
# 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]
received_json = json.loads(data)
# GET COMMANDS
# "command" : "..."
# SET COMMANDS
# "command" : "..."
# "parameter" : " ..."
# DATA COMMANDS
# "command" : "..."
# "type" : "..."
# "dxcallsign" : "..."
# "data" : "..."
# print(received_json)
# print(received_json["type"])
# print(received_json["command"])
# try:
if received_json["type"] == 'SET' and received_json["command"] == 'STARTTNC' and not static.TNCSTARTED:
rx_audio = str(received_json["parameter"][0]["rx_audio"])
tx_audio = str(received_json["parameter"][0]["tx_audio"])
devicename = str(received_json["parameter"][0]["devicename"])
deviceport = str(received_json["parameter"][0]["deviceport"])
serialspeed = str(received_json["parameter"][0]["serialspeed"])
pttprotocol = str(received_json["parameter"][0]["pttprotocol"])
pttport = str(received_json["parameter"][0]["pttport"])
data_bits = str(received_json["parameter"][0]["data_bits"])
stop_bits = str(received_json["parameter"][0]["stop_bits"])
handshake = str(received_json["parameter"][0]["handshake"])
structlog.get_logger("structlog").warning("[DMN] Starting TNC", rig=devicename, port=deviceport)
#print(received_json["parameter"][0])
# command = "--rx "+ rx_audio +" \
# --tx "+ tx_audio +" \
# --deviceport "+ deviceport +" \
# --deviceid "+ deviceid + " \
# --serialspeed "+ serialspeed + " \
# --pttprotocol "+ pttprotocol + " \
# --pttport "+ pttport
# list of parameters, necessary for running subprocess command as a list
options = []
options.append('--rx')
options.append(rx_audio)
options.append('--tx')
options.append(tx_audio)
options.append('--deviceport')
options.append(deviceport)
options.append('--devicename')
options.append(devicename)
options.append('--serialspeed')
options.append(serialspeed)
options.append('--pttprotocol')
options.append(pttprotocol)
options.append('--pttport')
options.append(pttport)
options.append('--data_bits')
options.append(data_bits)
options.append('--stop_bits')
options.append(stop_bits)
options.append('--handshake')
options.append(handshake)
# try running tnc from binary, else run from source
# this helps running the tnc in a developer environment
try:
command = []
command.append('./tnc')
command += options
p = subprocess.Popen(command)
structlog.get_logger("structlog").info("[DMN] TNC started", path="binary")
except:
command = []
command.append('python3')
command.append('main.py')
command += options
p = subprocess.Popen(command)
structlog.get_logger("structlog").info("[DMN] TNC started", path="source")
static.TNCPROCESS = p # .pid
static.TNCSTARTED = True
if received_json["type"] == 'SET' and received_json["command"] == 'STOPTNC':
static.TNCPROCESS.kill()
structlog.get_logger("structlog").warning("[DMN] Stopping TNC")
#os.kill(static.TNCPROCESS, signal.SIGKILL)
static.TNCSTARTED = False
if received_json["type"] == 'GET' and received_json["command"] == 'DAEMON_STATE':
data = {
'COMMAND': 'DAEMON_STATE',
'DAEMON_STATE': [],
'PYTHON_VERSION': str(python_version),
'HAMLIB_VERSION': str(hamlib_version),
'INPUT_DEVICES': [],
'OUTPUT_DEVICES': [],
'SERIAL_DEVICES': [
], "CPU": str(psutil.cpu_percent()), "RAM": str(psutil.virtual_memory().percent), "VERSION": "0.1-prototype"}
if static.TNCSTARTED:
data["DAEMON_STATE"].append({"STATUS": "running"})
else:
data["DAEMON_STATE"].append({"STATUS": "stopped"})
# UPDATE LIST OF AUDIO DEVICES
try:
# we need to "try" this, because sometimes libasound.so isn't in the default place
# try to supress error messages
with noalsaerr(): # https://github.com/DJ2LS/FreeDATA/issues/22
p = pyaudio.PyAudio()
# else do it the default way
except:
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')
#crc_name = crc_algorithm(bytes(name, encoding='utf-8'))
#crc_name = crc_name.to_bytes(2, byteorder='big')
#crc_name = crc_name.hex()
#name = name + ' [' + crc_name + ']'
if maxInputChannels > 0:
data["INPUT_DEVICES"].append(
{"ID": i, "NAME": str(name)})
if maxOutputChannels > 0:
data["OUTPUT_DEVICES"].append(
{"ID": i, "NAME": str(name)})
p.terminate()
# UPDATE LIST OF SERIAL DEVICES
ports = serial.tools.list_ports.comports()
for port, desc, hwid in ports:
# calculate hex of hwid if we have unique names
crc_hwid = crc_algorithm(bytes(hwid, encoding='utf-8'))
crc_hwid = crc_hwid.to_bytes(2, byteorder='big')
crc_hwid = crc_hwid.hex()
description = desc + ' [' + crc_hwid + ']'
data["SERIAL_DEVICES"].append(
{"PORT": str(port), "DESCRIPTION": str(description) })
jsondata = json.dumps(data)
self.request.sendall(bytes(jsondata, encoding))
if received_json["type"] == 'GET' and received_json["command"] == 'TEST_HAMLIB':
try:
print(received_json["parameter"])
devicename = str(received_json["parameter"][0]["devicename"])
deviceport = str(received_json["parameter"][0]["deviceport"])
serialspeed = str(received_json["parameter"][0]["serialspeed"])
pttprotocol = str(received_json["parameter"][0]["pttprotocol"])
pttport = str(received_json["parameter"][0]["pttport"])
data_bits = str(received_json["parameter"][0]["data_bits"])
stop_bits = str(received_json["parameter"][0]["stop_bits"])
handshake = str(received_json["parameter"][0]["handshake"])
hamlib = rig.radio()
hamlib.open_rig(devicename=devicename, deviceport=deviceport, hamlib_ptt_type=pttprotocol, serialspeed=serialspeed, pttport=pttport, data_bits=data_bits, stop_bits=stop_bits, handshake=handshake)
hamlib.set_ptt(True)
pttstate = hamlib.get_ptt()
if pttstate:
structlog.get_logger("structlog").info("[DMN] Hamlib PTT", status = 'SUCCESS')
data = {'COMMAND': 'TEST_HAMLIB', 'RESULT': 'SUCCESS'}
elif not pttstate:
structlog.get_logger("structlog").warning("[DMN] Hamlib PTT", status = 'NO SUCCESS')
data = {'COMMAND': 'TEST_HAMLIB', 'RESULT': 'NOSUCCESS'}
else:
structlog.get_logger("structlog").error("[DMN] Hamlib PTT", status = 'FAILED')
data = {'COMMAND': 'TEST_HAMLIB', 'RESULT': 'FAILED'}
hamlib.set_ptt(False)
hamlib.close_rig()
jsondata = json.dumps(data)
self.request.sendall(bytes(jsondata, encoding))
except Exception as e:
print(e)
structlog.get_logger("structlog").error("[DMN] Hamlib: Can't open rig", e = sys.exc_info()[0])
# exception, if JSON cant be decoded
# except Exception as e:
except ValueError as e:
print("############ START OF ERROR #####################")
print('DAEMON PROGRAM ERROR: %s' % str(e))
print("Wrong command")
print(data)
print(e)
exc_type, 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)
print("############ END OF ERROR #######################")
# exception for any other errors
# in case of index error for example which is caused by a hard network interruption
except:
structlog.get_logger("structlog").error("[DMN] Network error", e = sys.exc_info()[0])
structlog.get_logger("structlog").warning("[DMN] Closing client socket")
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()
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