FreeDATA/tnc/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
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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
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import ujson as json
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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
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import logging, structlog, log_handler
import queue
import psutil
import audio
import base64
import atexit
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SOCKET_QUEUE = queue.Queue()
DAEMON_QUEUE = queue.Queue()
CONNECTED_CLIENTS = set()
CLOSE_SIGNAL = False
class ThreadedTCPServer(socketserver.ThreadingMixIn, socketserver.TCPServer):
"""
the socket handler base class
"""
pass
class ThreadedTCPRequestHandler(socketserver.StreamRequestHandler):
""" """
def send_to_client(self):
"""
function called by socket handler
send data to a network client if available
"""
tempdata = b''
while self.connection_alive and not CLOSE_SIGNAL:
# send tnc state as network stream
# check server port against daemon port and send corresponding data
if self.server.server_address[1] == static.PORT and not static.TNCSTARTED:
data = send_tnc_state()
if data != tempdata:
tempdata = data
SOCKET_QUEUE.put(data)
else:
data = send_daemon_state()
if data != tempdata:
tempdata = data
SOCKET_QUEUE.put(data)
time.sleep(0.5)
while not SOCKET_QUEUE.empty():
data = SOCKET_QUEUE.get()
sock_data = bytes(data, 'utf-8')
sock_data += b'\n' # append line limiter
# send data to all clients
#try:
for client in CONNECTED_CLIENTS:
try:
client.send(sock_data)
except Exception as e:
print("connection lost...")
print(e)
self.connection_alive = False
# we want to transmit scatter data only once to reduce network traffic
static.SCATTER = []
# we want to display INFO messages only once
static.INFO = []
#self.request.sendall(sock_data)
time.sleep(0.15)
def receive_from_client(self):
"""
function which is called by the socket handler
it processes the data which is returned by a client
"""
data = bytes()
while self.connection_alive and not CLOSE_SIGNAL:
try:
chunk = self.request.recv(1024)
data += chunk
if chunk == b'':
#print("connection broken. Closing...")
self.connection_alive = False
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if data.startswith(b'{') and data.endswith(b'}\n'):
# split data by \n if we have multiple commands in socket buffer
data = data.split(b'\n')
# remove empty data
data.remove(b'')
# iterate thorugh data list
for commands in data:
if self.server.server_address[1] == static.PORT:
process_tnc_commands(commands)
else:
process_daemon_commands(commands)
# wait some time between processing multiple commands
# this is only a first test to avoid doubled transmission
# we might improve this by only processing one command or
# doing some kind of selection to determin which commands need to be dropped
# and which one can be processed during a running transmission
time.sleep(3)
# finally delete our rx buffer to be ready for new commands
data = bytes()
except Exception as e:
structlog.get_logger("structlog").info("[SCK] Connection closed", ip=self.client_address[0], port=self.client_address[1], e=e)
self.connection_alive = False
def handle(self):
"""
socket handler
"""
CONNECTED_CLIENTS.add(self.request)
structlog.get_logger("structlog").debug("[SCK] Client connected", ip=self.client_address[0], port=self.client_address[1])
self.connection_alive = True
self.sendThread = threading.Thread(target=self.send_to_client, args=[],daemon=True).start()
self.receiveThread = threading.Thread(target=self.receive_from_client, args=[],daemon=True).start()
# keep connection alive until we close it
while self.connection_alive and not CLOSE_SIGNAL:
time.sleep(1)
def finish(self):
""" """
structlog.get_logger("structlog").warning("[SCK] Closing client socket", ip=self.client_address[0], port=self.client_address[1])
try:
CONNECTED_CLIENTS.remove(self.request)
except:
structlog.get_logger("structlog").warning("[SCK] client connection already removed from client list", client=self.request)
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def process_tnc_commands(data):
"""
process tnc commands
Args:
data:
Returns:
"""
# we need to do some error handling in case of socket timeout or decoding issue
try:
# convert data to json object
received_json = json.loads(data)
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structlog.get_logger("structlog").debug("[SCK] CMD", command=received_json)
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# SET TX AUDIO LEVEL -----------------------------------------------------
if received_json["type"] == "set" and received_json["command"] == "tx_audio_level":
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try:
static.TX_AUDIO_LEVEL = int(received_json["value"])
command_response("tx_audio_level", True)
except Exception as e:
command_response("tx_audio_level", False)
structlog.get_logger("structlog").warning("[SCK] command execution error", e=e, command=received_json)
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# TRANSMIT SINE WAVE -----------------------------------------------------
if received_json["type"] == "set" and received_json["command"] == "send_test_frame":
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try:
data_handler.DATA_QUEUE_TRANSMIT.put(['SEND_TEST_FRAME'])
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command_response("send_test_frame", True)
except Exception as e:
command_response("send_test_frame", False)
structlog.get_logger("structlog").warning("[SCK] command execution error", e=e, command=received_json)
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# CQ CQ CQ -----------------------------------------------------
if received_json["command"] == "cqcqcq":
try:
data_handler.DATA_QUEUE_TRANSMIT.put(['CQ'])
command_response("cqcqcq", True)
except Exception as e:
command_response("cqcqcq", False)
structlog.get_logger("structlog").warning("[SCK] command execution error", e=e, command=received_json)
# START_BEACON -----------------------------------------------------
if received_json["command"] == "start_beacon":
try:
static.BEACON_STATE = True
interval = int(received_json["parameter"])
data_handler.DATA_QUEUE_TRANSMIT.put(['BEACON', interval, True])
command_response("start_beacon", True)
except Exception as e:
command_response("start_beacon", False)
structlog.get_logger("structlog").warning("[SCK] command execution error", e=e, command=received_json)
# STOP_BEACON -----------------------------------------------------
if received_json["command"] == "stop_beacon":
try:
structlog.get_logger("structlog").warning("[TNC] Stopping beacon!")
static.BEACON_STATE = False
data_handler.DATA_QUEUE_TRANSMIT.put(['BEACON', None, False])
command_response("stop_beacon", True)
except Exception as e:
command_response("stop_beacon", False)
structlog.get_logger("structlog").warning("[SCK] command execution error", e=e, command=received_json)
# PING ----------------------------------------------------------
if received_json["type"] == 'ping' and received_json["command"] == "ping":
# send ping frame and wait for ACK
try:
dxcallsign = received_json["dxcallsign"]
# additional step for beeing sure our callsign is correctly
# in case we are not getting a station ssid
# then we are forcing a station ssid = 0
dxcallsign = helpers.callsign_to_bytes(dxcallsign)
dxcallsign = helpers.bytes_to_callsign(dxcallsign)
data_handler.DATA_QUEUE_TRANSMIT.put(['PING', dxcallsign])
command_response("ping", True)
except Exception as e:
command_response("ping", False)
structlog.get_logger("structlog").warning("[SCK] command execution error", e=e, command=received_json)
# CONNECT ----------------------------------------------------------
if received_json["type"] == 'arq' and received_json["command"] == "connect":
static.BEACON_PAUSE = True
# send ping frame and wait for ACK
try:
dxcallsign = received_json["dxcallsign"]
# additional step for beeing sure our callsign is correctly
# in case we are not getting a station ssid
# then we are forcing a station ssid = 0
dxcallsign = helpers.callsign_to_bytes(dxcallsign)
dxcallsign = helpers.bytes_to_callsign(dxcallsign)
static.DXCALLSIGN = dxcallsign
static.DXCALLSIGN_CRC = helpers.get_crc_24(static.DXCALLSIGN)
data_handler.DATA_QUEUE_TRANSMIT.put(['CONNECT', dxcallsign])
command_response("connect", True)
except Exception as e:
command_response("connect", False)
structlog.get_logger("structlog").warning("[SCK] command execution error", e=e, command=received_json)
# DISCONNECT ----------------------------------------------------------
if received_json["type"] == 'arq' and received_json["command"] == "disconnect":
# send ping frame and wait for ACK
try:
data_handler.DATA_QUEUE_TRANSMIT.put(['DISCONNECT'])
command_response("disconnect", True)
except Exception as e:
command_response("disconnect", False)
structlog.get_logger("structlog").warning("[SCK] command execution error", e=e, command=received_json)
# TRANSMIT RAW DATA -------------------------------------------
if received_json["type"] == 'arq' and received_json["command"] == "send_raw":
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static.BEACON_PAUSE = True
try:
if not static.ARQ_SESSION:
dxcallsign = received_json["parameter"][0]["dxcallsign"]
# additional step for beeing sure our callsign is correctly
# in case we are not getting a station ssid
# then we are forcing a station ssid = 0
dxcallsign = helpers.callsign_to_bytes(dxcallsign)
dxcallsign = helpers.bytes_to_callsign(dxcallsign)
static.DXCALLSIGN = dxcallsign
static.DXCALLSIGN_CRC = helpers.get_crc_24(static.DXCALLSIGN)
command_response("send_raw", True)
else:
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dxcallsign = static.DXCALLSIGN
static.DXCALLSIGN_CRC = helpers.get_crc_24(static.DXCALLSIGN)
mode = int(received_json["parameter"][0]["mode"])
n_frames = int(received_json["parameter"][0]["n_frames"])
base64data = received_json["parameter"][0]["data"]
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# check if specific callsign is set with different SSID than the TNC is initialized
try:
mycallsign = received_json["parameter"][0]["mycallsign"]
except:
mycallsign = static.MYCALLSIGN
# check if transmission uuid provided else set no-uuid
try:
arq_uuid = received_json["uuid"]
except:
arq_uuid = 'no-uuid'
if not len(base64data) % 4:
binarydata = base64.b64decode(base64data)
data_handler.DATA_QUEUE_TRANSMIT.put(['ARQ_RAW', binarydata, mode, n_frames, arq_uuid, mycallsign])
else:
raise TypeError
except Exception as e:
command_response("send_raw", False)
structlog.get_logger("structlog").warning("[SCK] command execution error", e=e, command=received_json)
# STOP TRANSMISSION ----------------------------------------------------------
if received_json["type"] == 'arq' and received_json["command"] == "stop_transmission":
try:
if static.TNC_STATE == 'BUSY' or static.ARQ_STATE:
data_handler.DATA_QUEUE_TRANSMIT.put(['STOP'])
structlog.get_logger("structlog").warning("[TNC] Stopping transmission!")
static.TNC_STATE = 'IDLE'
static.ARQ_STATE = False
command_response("stop_transmission", True)
except Exception as e:
command_response("stop_transmission", False)
structlog.get_logger("structlog").warning("[SCK] command execution error", e=e, command=received_json)
if received_json["type"] == 'get' and received_json["command"] == 'rx_buffer':
try:
output = {
"command": "rx_buffer",
"data-array": [],
}
for i in range(0, len(static.RX_BUFFER)):
#print(static.RX_BUFFER[i][4])
#rawdata = json.loads(static.RX_BUFFER[i][4])
base64_data = static.RX_BUFFER[i][4]
output["data-array"].append({"uuid": static.RX_BUFFER[i][0],"timestamp": static.RX_BUFFER[i][1], "dxcallsign": str(static.RX_BUFFER[i][2], 'utf-8'), "dxgrid": str(static.RX_BUFFER[i][3], 'utf-8'), "data": base64_data})
jsondata = json.dumps(output)
#self.request.sendall(bytes(jsondata, encoding))
SOCKET_QUEUE.put(jsondata)
command_response("rx_buffer", True)
except Exception as e:
command_response("rx_buffer", False)
structlog.get_logger("structlog").warning("[SCK] command execution error", e=e, command=received_json)
if received_json["type"] == 'set' and received_json["command"] == 'del_rx_buffer':
try:
static.RX_BUFFER = []
command_response("del_rx_buffer", True)
except Exception as e:
command_response("del_rx_buffer", False)
structlog.get_logger("structlog").warning("[SCK] command execution error", e=e, command=received_json)
# exception, if JSON cant be decoded
except Exception as e:
structlog.get_logger("structlog").error("[TNC] JSON decoding error", e=e)
def send_tnc_state():
"""
send the tnc state to network
"""
encoding = 'utf-8'
output = {
"command": "tnc_state",
"ptt_state": str(static.PTT_STATE),
"tnc_state": str(static.TNC_STATE),
"arq_state": str(static.ARQ_STATE),
"arq_session": str(static.ARQ_SESSION),
"arq_session_state": str(static.ARQ_SESSION_STATE),
"audio_rms": str(static.AUDIO_RMS),
"snr": str(static.SNR),
"frequency": str(static.HAMLIB_FREQUENCY),
"speed_level": str(static.ARQ_SPEED_LEVEL),
"mode": str(static.HAMLIB_MODE),
"bandwith": str(static.HAMLIB_BANDWITH),
"fft": str(static.FFT),
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"channel_busy": str(static.CHANNEL_BUSY),
"scatter": static.SCATTER,
"rx_buffer_length": str(len(static.RX_BUFFER)),
"rx_msg_buffer_length": str(len(static.RX_MSG_BUFFER)),
"arq_bytes_per_minute": str(static.ARQ_BYTES_PER_MINUTE),
"arq_bytes_per_minute_burst": str(static.ARQ_BYTES_PER_MINUTE_BURST),
"arq_compression_factor": str(static.ARQ_COMPRESSION_FACTOR),
"arq_transmission_percent": str(static.ARQ_TRANSMISSION_PERCENT),
"total_bytes": str(static.TOTAL_BYTES),
"info" : static.INFO,
"beacon_state" : str(static.BEACON_STATE),
"stations": [],
"mycallsign": str(static.MYCALLSIGN, encoding),
"dxcallsign": str(static.DXCALLSIGN, encoding),
"dxgrid": str(static.DXGRID, encoding),
}
# add heard stations to heard stations object
for i in range(0, len(static.HEARD_STATIONS)):
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], "offset": static.HEARD_STATIONS[i][5], "frequency": static.HEARD_STATIONS[i][6]})
jsondata = json.dumps(output)
return jsondata
def process_daemon_commands(data):
"""
process daemon commands
Args:
data:
Returns:
"""
# convert data to json object
received_json = json.loads(data)
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structlog.get_logger("structlog").debug("[SCK] CMD", command=received_json)
if received_json["type"] == 'set' and received_json["command"] == 'mycallsign':
try:
callsign = received_json["parameter"]
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if bytes(callsign, 'utf-8') == b'':
self.request.sendall(b'INVALID CALLSIGN')
structlog.get_logger("structlog").warning("[DMN] SET MYCALL FAILED", call=static.MYCALLSIGN, crc=static.MYCALLSIGN_CRC)
else:
static.MYCALLSIGN = bytes(callsign, 'utf-8')
static.MYCALLSIGN_CRC = helpers.get_crc_24(static.MYCALLSIGN)
command_response("mycallsign", True)
structlog.get_logger("structlog").info("[DMN] SET MYCALL", call=static.MYCALLSIGN, crc=static.MYCALLSIGN_CRC)
except Exception as e:
command_response("mycallsign", False)
structlog.get_logger("structlog").warning("[SCK] command execution error", e=e, command=received_json)
if received_json["type"] == 'set' and received_json["command"] == 'mygrid':
try:
mygrid = received_json["parameter"]
if bytes(mygrid, 'utf-8') == b'':
self.request.sendall(b'INVALID GRID')
else:
static.MYGRID = bytes(mygrid, 'utf-8')
structlog.get_logger("structlog").info("[SCK] SET MYGRID", grid=static.MYGRID)
command_response("mygrid", True)
except Exception as e:
command_response("mygrid", False)
structlog.get_logger("structlog").warning("[SCK] command execution error", e=e, command=received_json)
if received_json["type"] == 'set' and received_json["command"] == 'start_tnc' and not static.TNCSTARTED:
try:
mycall = str(received_json["parameter"][0]["mycall"])
mygrid = str(received_json["parameter"][0]["mygrid"])
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"])
radiocontrol = str(received_json["parameter"][0]["radiocontrol"])
rigctld_ip = str(received_json["parameter"][0]["rigctld_ip"])
rigctld_port = str(received_json["parameter"][0]["rigctld_port"])
enable_scatter = str(received_json["parameter"][0]["enable_scatter"])
enable_fft = str(received_json["parameter"][0]["enable_fft"])
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enable_fsk = str(received_json["parameter"][0]["enable_fsk"])
low_bandwith_mode = str(received_json["parameter"][0]["low_bandwith_mode"])
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tuning_range_fmin = str(received_json["parameter"][0]["tuning_range_fmin"])
tuning_range_fmax = str(received_json["parameter"][0]["tuning_range_fmax"])
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tx_audio_level = str(received_json["parameter"][0]["tx_audio_level"])
respond_to_cq = str(received_json["parameter"][0]["respond_to_cq"])
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# print some debugging parameters
for item in received_json["parameter"][0]:
structlog.get_logger("structlog").debug("[DMN] TNC Startup Config : " + item, value=received_json["parameter"][0][item])
DAEMON_QUEUE.put(['STARTTNC', \
mycall, \
mygrid, \
rx_audio, \
tx_audio, \
devicename, \
deviceport, \
serialspeed, \
pttprotocol, \
pttport, \
data_bits, \
stop_bits, \
handshake, \
radiocontrol, \
rigctld_ip, \
rigctld_port, \
enable_scatter, \
enable_fft, \
low_bandwith_mode, \
tuning_range_fmin, \
tuning_range_fmax, \
enable_fsk, \
tx_audio_level, \
respond_to_cq \
])
command_response("start_tnc", True)
except Exception as e:
command_response("start_tnc", False)
structlog.get_logger("structlog").warning("[SCK] command execution error", e=e, command=received_json)
if received_json["type"] == 'get' and received_json["command"] == 'test_hamlib':
try:
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"])
radiocontrol = str(received_json["parameter"][0]["radiocontrol"])
rigctld_ip = str(received_json["parameter"][0]["rigctld_ip"])
rigctld_port = str(received_json["parameter"][0]["rigctld_port"])
DAEMON_QUEUE.put(['TEST_HAMLIB', \
devicename, \
deviceport, \
serialspeed, \
pttprotocol, \
pttport, \
data_bits, \
stop_bits, \
handshake, \
radiocontrol, \
rigctld_ip, \
rigctld_port \
])
command_response("test_hamlib", True)
except Exception as e:
command_response("test_hamlib", False)
structlog.get_logger("structlog").warning("[SCK] command execution error", e=e, command=received_json)
if received_json["type"] == 'set' and received_json["command"] == 'stop_tnc':
try:
static.TNCPROCESS.kill()
# unregister process from atexit to avoid process zombies
atexit.unregister(static.TNCPROCESS.kill)
structlog.get_logger("structlog").warning("[DMN] Stopping TNC")
static.TNCSTARTED = False
command_response("stop_tnc", True)
except Exception as e:
command_response("stop_tnc", False)
structlog.get_logger("structlog").warning("[SCK] command execution error", e=e, command=received_json)
def send_daemon_state():
"""
send the daemon state to network
"""
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try:
python_version = str(sys.version_info[0]) + "." + str(sys.version_info[1])
output = {
'command': 'daemon_state',
'daemon_state': [],
'python_version': str(python_version),
'hamlib_version': static.HAMLIB_VERSION,
'input_devices': static.AUDIO_INPUT_DEVICES,
'output_devices': static.AUDIO_OUTPUT_DEVICES,
'serial_devices': static.SERIAL_DEVICES,
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#'cpu': str(psutil.cpu_percent()),
#'ram': str(psutil.virtual_memory().percent),
'version': '0.1'
}
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if static.TNCSTARTED:
output["daemon_state"].append({"status": "running"})
else:
output["daemon_state"].append({"status": "stopped"})
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jsondata = json.dumps(output)
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return jsondata
except Exception as e:
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structlog.get_logger("structlog").warning("[SCK] error", e=e)
return None
def command_response(command, status):
if status:
status = "OK"
else:
status = "Failed"
jsondata = {"command_response": command, "status" : status}
data_out = json.dumps(jsondata)
SOCKET_QUEUE.put(data_out)