FreeDATA/sock.py

#!/usr/bin/env python3
# -*- coding: utf-8 -*-
"""
Created on Fri Dec 25 21:25:14 2020

@author: DJ2LS
"""

import socketserver
import threading
import logging
import time
import json

import static
import data_handler
import helpers
import fec

import asyncio

class CMDTCPRequestHandler(socketserver.BaseRequestHandler):    

    def handle(self):
    
        encoding = 'utf-8'    
        #data = str(self.request.recv(1024), 'utf-8')
        
        data = bytes()
        while True: 
            chunk = self.request.recv(8192)#.strip() 
            data += chunk
            if chunk.endswith(b'\n'):
                break
        data = data[:-1] # remove b'\n'
        data = str(data, 'utf-8')        

        # SOCKETTEST ---------------------------------------------------
        if data == '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':
            asyncio.run(data_handler.transmit_cq())
            self.request.sendall(b'CALLING CQ')

        
        # PING ----------------------------------------------------------
        if data.startswith('PING:'):
            #send ping frame and wait for ACK
            pingcommand = data.split('PING:')
            dxcallsign = pingcommand[1]
            data_handler.transmit_ping(dxcallsign)
        
        
        # ARQ CONNECT TO CALLSIGN ----------------------------------------
        if data.startswith('ARQ:CONNECT:'):
            arqconnectcommand = data.split('ARQ:CONNECT:')
            dxcallsign = arqconnectcommand[1]
            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':
                # here we send an "CONNECT FRAME
                
                #ARQ_CONNECT_THREAD = threading.Thread(target=data_handler.arq_connect, name="ARQ_CONNECT")
                #ARQ_CONNECT_THREAD.start()
                asyncio.run(data_handler.arq_connect())
                self.request.sendall(bytes("CONNECTING", encoding))
                #data_handler.arq_connect()
        # ARQ DISCONNECT FROM CALLSIGN ----------------------------------------
        if data == 'ARQ:DISCONNECT':

            #ARQ_DISCONNECT_THREAD = threading.Thread(target=data_handler.arq_disconnect, name="ARQ_DISCONNECT")
            #ARQ_DISCONNECT_THREAD.start()  
            asyncio.run(data_handler.arq_disconnect())
            self.request.sendall(bytes("DISCONNECTING", encoding))
            #data_handler.arq_disconnect()
        
            
        # TRANSMIT ARQ MESSAGE ------------------------------------------   
        # wen need to change the TNC_STATE to "CONNECTE" and need to make sure we have a valid callsign and callsign crc8 of the DX station
        #print(static.ARQ_STATE)
        if data.startswith('ARQ:DATA:') and static.ARQ_STATE == 'CONNECTED':           
            static.ARQ_READY_FOR_DATA = False
            logging.info("CMD | NEW ARQ DATA")
            self.request.sendall(b'SENDING ARQ DATA')
            asyncio.run(data_handler.arq_open_data_channel())
            #data_handler.arq_open_data_channel()
            
            #wait until we set the data mode
            # here we need a timeout as well!!!
            while static.ARQ_READY_FOR_DATA == False:
                time.sleep(0.01)
            
            if static.ARQ_READY_FOR_DATA == True:
                #logging.info("CMD | SENDING ARQ DATA")
                static.TNC_STATE = 'BUSY'
                arqdata = data.split('ARQ:')
                data_out = bytes(arqdata[1], 'utf-8')

                asyncio.run(data_handler.arq_transmit(data_out))
                
                #data_handler.arq_transmit(data_out)
                #TRANSMIT_ARQ = threading.Thread(target=data_handler.transmit, args=[data_out], name="TRANSMIT_ARQ")
                #TRANSMIT_ARQ.start()
        
        
        
        # SETTINGS AND STATUS ---------------------------------------------   
        if data.startswith('SET:MYCALLSIGN:'):
            callsign = data.split('SET:MYCALLSIGN:')
            if bytes(callsign[1], encoding) == b'':
                self.request.sendall(b'INVALID CALLSIGN')
            else:    
                static.MYCALLSIGN = bytes(callsign[1], encoding)
                static.MYCALLSIGN_CRC8 = helpers.get_crc_8(static.MYCALLSIGN)
                self.request.sendall(static.MYCALLSIGN)
                logging.info("CMD | MYCALLSIGN: " + str(static.MYCALLSIGN))
              
            
        if data == 'GET:MYCALLSIGN':
            self.request.sendall(bytes(static.MYCALLSIGN, encoding))
                        
        #if data == 'GET:MYCALLSIGN_CRC8':
        #    self.request.sendall(bytes(static.MYCALLSIGN_CRC8, encoding))
            
        if data == 'GET:DXCALLSIGN':
            self.request.sendall(bytes(static.DXCALLSIGN, encoding))              
        
        if data == 'GET:TNC_STATE':
            output = {
                "PTT_STATE": str(static.PTT_STATE),
                "CHANNEL_STATE": str(static.CHANNEL_STATE),
                "TNC_STATE": str(static.TNC_STATE),
                "ARQ_STATE": str(static.ARQ_STATE)
            }
            jsondata = json.dumps(output)
            self.request.sendall(bytes(jsondata, encoding))
           
        if data == 'GET:DATA_STATE':
            output = {
                "RX_BUFFER_LENGTH": str(len(static.RX_BUFFER)),
                "TX_N_MAX_RETRIES": static.TX_N_MAX_RETRIES,
                "ARQ_TX_N_FRAMES_PER_BURST": static.ARQ_TX_N_FRAMES_PER_BURST,
                "ARQ_TX_N_BURSTS": static.ARQ_TX_N_BURSTS,
                "ARQ_TX_N_CURRENT_ARQ_FRAME": static.ARQ_TX_N_CURRENT_ARQ_FRAME,
                "ARQ_TX_N_TOTAL_ARQ_FRAMES": static.ARQ_TX_N_TOTAL_ARQ_FRAMES,
                "ARQ_RX_FRAME_N_BURSTS": static.ARQ_RX_FRAME_N_BURSTS,
                "ARQ_RX_N_CURRENT_ARQ_FRAME": static.ARQ_RX_N_CURRENT_ARQ_FRAME,                                                                
                "ARQ_N_ARQ_FRAMES_PER_DATA_FRAME": static.ARQ_N_ARQ_FRAMES_PER_DATA_FRAME                                                              
            }
            jsondata = json.dumps(output)
            self.request.sendall(bytes(jsondata, encoding))                 
       
   

        if data.startswith('GET: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 data == 'DEL:RX_BUFFER':
            static.RX_BUFFER = []





def start_cmd_socket():

    try:
        logging.info("SRV | STARTING TCP/IP SOCKET FOR CMD ON PORT: " + str(static.PORT))
        socketserver.TCPServer.allow_reuse_address = True #https://stackoverflow.com/a/16641793
        cmdserver = socketserver.TCPServer((static.HOST, static.PORT), CMDTCPRequestHandler)
        cmdserver.serve_forever()
    
    finally:
        cmdserver.server_close()