var net = require("net"); const path = require("path"); const { ipcRenderer } = require("electron"); const log = require("electron-log"); const socketLog = log.scope("tnc"); //const utf8 = require("utf8"); // https://stackoverflow.com/a/26227660 var appDataFolder = process.env.APPDATA || (process.platform == "darwin" ? process.env.HOME + "/Library/Application Support" : process.env.HOME + "/.config"); var configFolder = path.join(appDataFolder, "FreeDATA"); var configPath = path.join(configFolder, "config.json"); const config = require(configPath); var client = new net.Socket(); var socketchunk = ""; // Current message, per connection. // split character const split_char = "\0;\1;"; // globals for getting new data only if available so we are saving bandwidth var rxBufferLengthTnc = 0; var rxBufferLengthGui = 0; //var rxMsgBufferLengthTnc = 0; //var rxMsgBufferLengthGui = 0; // global to keep track of TNC connection error emissions var tncShowConnectStateError = 1; // global for storing ip information var tnc_port = config.tnc_port; var tnc_host = config.tnc_host; // network connection Timeout setTimeout(connectTNC, 2000); function connectTNC() { //exports.connectTNC = function(){ //socketLog.info('connecting to TNC...') //clear message buffer after reconnecting or initial connection socketchunk = ""; if (config.tnclocation == "localhost") { client.connect(3000, "127.0.0.1"); } else { client.connect(tnc_port, tnc_host); } } client.on("connect", function (data) { socketLog.info("TNC connection established"); let Data = { busy_state: "-", arq_state: "-", //channel_state: "-", frequency: "-", mode: "-", bandwidth: "-", dbfs_level: 0, }; ipcRenderer.send("request-update-tnc-state", Data); // also update tnc connection state ipcRenderer.send("request-update-tnc-connection", { tnc_connection: client.readyState, }); tncShowConnectStateError = 1; }); client.on("error", function (data) { if (tncShowConnectStateError == 1) { socketLog.error("TNC connection error"); tncShowConnectStateError = 0; } setTimeout(connectTNC, 500); client.destroy(); let Data = { tnc_connection: client.readyState, busy_state: "-", arq_state: "-", //channel_state: "-", frequency: "-", mode: "-", bandwidth: "-", dbfs_level: 0, }; ipcRenderer.send("request-update-tnc-state", Data); ipcRenderer.send("request-update-tnc-connection", { tnc_connection: client.readyState, }); }); /* client.on('close', function(data) { socketLog.info(' TNC connection closed'); setTimeout(connectTNC, 2000) }); */ client.on("end", function (data) { socketLog.info("TNC connection ended"); ipcRenderer.send("request-update-tnc-connection", { tnc_connection: client.readyState, }); client.destroy(); setTimeout(connectTNC, 500); }); writeTncCommand = function (command) { //socketLog.info(command) // we use the writingCommand function to update our TCPIP state because we are calling this function a lot // if socket opened, we are able to run commands if (client.readyState == "open") { client.write(command + "\n"); } if (client.readyState == "closed") { socketLog.info("CLOSED!"); } if (client.readyState == "opening") { socketLog.info("connecting to TNC..."); } }; client.on("data", function (socketdata) { ipcRenderer.send("request-update-tnc-connection", { tnc_connection: client.readyState, }); /* inspired by: stackoverflow.com questions 9070700 nodejs-net-createserver-large-amount-of-data-coming-in */ socketdata = socketdata.toString("utf8"); // convert data to string socketchunk += socketdata; // append data to buffer so we can stick long data together // check if we received begin and end of json data if (socketchunk.startsWith('{"') && socketchunk.endsWith('"}\n')) { var data = ""; // split data into chunks if we received multiple commands socketchunk = socketchunk.split("\n"); //don't think this is needed anymore //data = JSON.parse(socketchunk[0]) // search for empty entries in socketchunk and remove them for (i = 0; i < socketchunk.length; i++) { if (socketchunk[i] === "") { socketchunk.splice(i, 1); } } //iterate through socketchunks array to execute multiple commands in row for (i = 0; i < socketchunk.length; i++) { //check if data is not empty if (socketchunk[i].length > 0) { //try to parse JSON try { data = JSON.parse(socketchunk[i]); } catch (e) { socketLog.info("Throwing away data!!!!\n" + e); // "SyntaxError //socketLog.info(e); // "SyntaxError socketLog.info(socketchunk[i]); socketchunk = ""; //If we're here, I don't think we want to process any data that may be in data variable continue; } } if (data["command"] == "tnc_state") { //socketLog.info(data) // set length of RX Buffer to global variable rxBufferLengthTnc = data["rx_buffer_length"]; //rxMsgBufferLengthTnc = data["rx_msg_buffer_length"]; let Data = { mycallsign: data["mycallsign"], mygrid: data["mygrid"], ptt_state: data["ptt_state"], busy_state: data["tnc_state"], arq_state: data["arq_state"], arq_session: data["arq_session"], //channel_state: data['CHANNEL_STATE'], frequency: data["frequency"], speed_level: data["speed_level"], mode: data["mode"], bandwidth: data["bandwidth"], dbfs_level: data["audio_dbfs"], fft: data["fft"], channel_busy: data["channel_busy"], scatter: data["scatter"], info: data["info"], rx_buffer_length: data["rx_buffer_length"], rx_msg_buffer_length: data["rx_msg_buffer_length"], tx_n_max_retries: data["tx_n_max_retries"], arq_tx_n_frames_per_burst: data["arq_tx_n_frames_per_burst"], arq_tx_n_bursts: data["arq_tx_n_bursts"], arq_tx_n_current_arq_frame: data["arq_tx_n_current_arq_frame"], arq_tx_n_total_arq_frames: data["arq_tx_n_total_arq_frames"], arq_rx_frame_n_bursts: data["arq_rx_frame_n_bursts"], arq_rx_n_current_arq_frame: data["arq_rx_n_current_arq_frame"], arq_n_arq_frames_per_data_frame: data["arq_n_arq_frames_per_data_frame"], arq_bytes_per_minute: data["arq_bytes_per_minute"], arq_seconds_until_finish: data["arq_seconds_until_finish"], arq_compression_factor: data["arq_compression_factor"], total_bytes: data["total_bytes"], arq_transmission_percent: data["arq_transmission_percent"], stations: data["stations"], beacon_state: data["beacon_state"], hamlib_status: data["hamlib_status"], listen: data["listen"], audio_recording: data["audio_recording"], speed_list: data["speed_list"], strength: data["strength"], is_codec2_traffic: data["is_codec2_traffic"], //speed_table: [{"bpm" : 5200, "snr": -3, "timestamp":1673555399},{"bpm" : 2315, "snr": 12, "timestamp":1673555500}], }; ipcRenderer.send("request-update-tnc-state", Data); //continue to next for loop iteration, nothing else needs to be done here continue; } // ----------- catch tnc messages START ----------- if (data["freedata"] == "tnc-message") { switch (data["fec"]) { case "is_writing": // RX'd FECiswriting ipcRenderer.send("request-show-fec-toast-iswriting", { data: [data], }); break; } switch (data["cq"]) { case "transmitting": // CQ TRANSMITTING ipcRenderer.send("request-show-cq-toast-transmitting", { data: [data], }); break; case "received": // CQ RECEIVED ipcRenderer.send("request-show-cq-toast-received", { data: [data], }); break; } switch (data["qrv"]) { case "transmitting": // QRV TRANSMITTING ipcRenderer.send("request-show-qrv-toast-transmitting", { data: [data], }); break; case "received": // QRV RECEIVED ipcRenderer.send("request-show-qrv-toast-received", { data: [data], }); break; } switch (data["beacon"]) { case "transmitting": // BEACON TRANSMITTING ipcRenderer.send("request-show-beacon-toast-transmitting", { data: [data], }); break; case "received": // BEACON RECEIVED ipcRenderer.send("request-show-beacon-toast-received", { data: [data], }); ipcRenderer.send("request-new-msg-received", { data: [data] }); break; } switch (data["ping"]) { case "transmitting": // PING TRANSMITTING ipcRenderer.send("request-show-ping-toast-transmitting", { data: [data], }); break; case "received": // PING RECEIVED ipcRenderer.send("request-show-ping-toast-received", { data: [data], }); ipcRenderer.send("request-new-msg-received", { data: [data] }); break; case "acknowledge": // PING ACKNOWLEDGE ipcRenderer.send("request-show-ping-toast-received-ack", { data: [data], }); ipcRenderer.send("request-new-msg-received", { data: [data] }); break; } // ARQ SESSION && freedata == tnc-message if (data["arq"] == "session") { switch (data["status"]) { case "connecting": // ARQ Open ipcRenderer.send("request-show-arq-toast-session-connecting", { data: [data], }); break; case "connected": // ARQ Opening ipcRenderer.send("request-show-arq-toast-session-connected", { data: [data], }); break; case "waiting": // ARQ Opening ipcRenderer.send("request-show-arq-toast-session-waiting", { data: [data], }); break; case "close": // ARQ Closing ipcRenderer.send("request-show-arq-toast-session-close", { data: [data], }); break; case "failed": // ARQ Failed ipcRenderer.send("request-show-arq-toast-session-failed", { data: [data], }); break; } } // ARQ TRANSMISSION && freedata == tnc-message if (data["arq"] == "transmission") { switch (data["status"]) { case "opened": // ARQ Open ipcRenderer.send("request-show-arq-toast-datachannel-opened", { data: [data], }); break; case "opening": // ARQ Opening IRS/ISS if (data["irs"] == "False") { ipcRenderer.send("request-show-arq-toast-datachannel-opening", { data: [data], }); ipcRenderer.send("request-update-transmission-status", { data: [data], }); } else { ipcRenderer.send( "request-show-arq-toast-datachannel-received-opener", { data: [data] } ); ipcRenderer.send("request-update-reception-status", { data: [data], }); } break; case "waiting": // ARQ waiting ipcRenderer.send("request-show-arq-toast-datachannel-waiting", { data: [data], }); break; case "receiving": // ARQ RX ipcRenderer.send("request-update-reception-status", { data: [data], }); break; case "failed": // ARQ TX Failed if (data["reason"] == "protocol version missmatch") { ipcRenderer.send( "request-show-arq-toast-transmission-failed-ver", { data: [data] } ); } else { ipcRenderer.send("request-show-arq-toast-transmission-failed", { data: [data], }); } switch (data["irs"]) { case "True": ipcRenderer.send("request-update-reception-status", { data: [data], }); break; default: ipcRenderer.send("request-update-transmission-status", { data: [data], }); break; } break; case "received": // ARQ Received ipcRenderer.send("request-show-arq-toast-transmission-received", { data: [data], }); ipcRenderer.send("request-update-reception-status", { data: [data], }); dataArray = []; messageArray = []; socketLog.info(data); // we need to encode here to do a deep check for checking if file or message //var encoded_data = atob(data['data']) var encoded_data = atob_FD(data["data"]); var splitted_data = encoded_data.split(split_char); if (splitted_data[0] == "f") { dataArray.push(data); } if (splitted_data[0] == "m") { messageArray.push(data); console.log(data); } rxBufferLengthGui = dataArray.length; let Files = { data: dataArray, }; ipcRenderer.send("request-update-rx-buffer", Files); ipcRenderer.send("request-new-msg-received", Files); //rxMsgBufferLengthGui = messageArray.length; let Messages = { data: messageArray, }; ipcRenderer.send("request-new-msg-received", Messages); break; case "transmitting": // ARQ transmitting ipcRenderer.send( "request-show-arq-toast-transmission-transmitting", { data: [data] } ); ipcRenderer.send("request-update-transmission-status", { data: [data], }); break; case "transmitted": // ARQ transmitted ipcRenderer.send( "request-show-arq-toast-transmission-transmitted", { data: [data] } ); ipcRenderer.send("request-update-transmission-status", { data: [data], }); break; } } } // ----------- catch tnc info messages END ----------- // if we manually checking for the rx buffer we are getting an array of multiple data if (data["command"] == "rx_buffer") { socketLog.info(data); // iterate through buffer list and sort it to file or message array dataArray = []; messageArray = []; for (i = 0; i < data["data-array"].length; i++) { try { // we need to encode here to do a deep check for checking if file or message //var encoded_data = atob(data['data-array'][i]['data']) var encoded_data = atob_FD(data["data-array"][i]["data"]); var splitted_data = encoded_data.split(split_char); if (splitted_data[0] == "f") { dataArray.push(data["data-array"][i]); } if (splitted_data[0] == "m") { messageArray.push(data["data-array"][i]); } } catch (e) { socketLog.info(e); } } rxBufferLengthGui = dataArray.length; let Files = { data: dataArray, }; ipcRenderer.send("request-update-rx-buffer", Files); //rxMsgBufferLengthGui = messageArray.length; let Messages = { data: messageArray, }; //ipcRenderer.send('request-update-rx-msg-buffer', Messages); ipcRenderer.send("request-new-msg-received", Messages); } } //finally delete message buffer socketchunk = ""; } }); function hexToBytes(hex) { for (var bytes = [], c = 0; c < hex.length; c += 2) bytes.push(parseInt(hex.substr(c, 2), 16)); return bytes; } //Get TNC State exports.getTncState = function () { command = '{"type" : "get", "command" : "tnc_state"}'; writeTncCommand(command); }; //Get DATA State exports.getDataState = function () { command = '{"type" : "get", "command" : "data_state"}'; //writeTncCommand(command) }; // Send Ping exports.sendPing = function (dxcallsign) { command = '{"type" : "ping", "command" : "ping", "dxcallsign" : "' + dxcallsign + '"}'; writeTncCommand(command); }; // Send CQ exports.sendCQ = function () { command = '{"type" : "broadcast", "command" : "cqcqcq"}'; writeTncCommand(command); }; // Set AUDIO Level exports.setTxAudioLevel = function (value) { command = '{"type" : "set", "command" : "tx_audio_level", "value" : "' + value + '"}'; writeTncCommand(command); }; // Send File exports.sendFile = function ( dxcallsign, mode, frames, filename, filetype, data, checksum ) { socketLog.info(data); socketLog.info(filetype); socketLog.info(filename); var datatype = "f"; data = datatype + split_char + filename + split_char + filetype + split_char + checksum + split_char + data; socketLog.info(data); //socketLog.info(btoa(data)) //Btoa / atob will not work with charsets > 8 bits (i.e. the emojis); should probably move away from using it //TODO: Will need to update anyother occurences and throughly test //data = btoa(data) data = btoa_FD(data); command = '{"type" : "arq", "command" : "send_raw", "parameter" : [{"dxcallsign" : "' + dxcallsign + '", "mode" : "' + mode + '", "n_frames" : "' + frames + '", "data" : "' + data + '"}]}'; writeTncCommand(command); }; // Send Message exports.sendMessage = function ( dxcallsign, mode, frames, data, checksum, uuid, command ) { data = btoa_FD( "m" + split_char + command + split_char + checksum + split_char + uuid + split_char + data ); command = '{"type" : "arq", "command" : "send_raw", "uuid" : "' + uuid + '", "parameter" : [{"dxcallsign" : "' + dxcallsign + '", "mode" : "' + mode + '", "n_frames" : "' + frames + '", "data" : "' + data + '", "attempts": "15"}]}'; socketLog.info(command); socketLog.info("-------------------------------------"); writeTncCommand(command); }; // Send Request message //It would be then „m + split + request + split + request-type“ function sendRequest(dxcallsign, mode, frames, data, command) { data = btoa_FD("m" + split_char + command + split_char + data); command = '{"type" : "arq", "command" : "send_raw", "parameter" : [{"dxcallsign" : "' + dxcallsign + '", "mode" : "' + mode + '", "n_frames" : "' + frames + '", "data" : "' + data + '", "attempts": "15"}]}'; socketLog.info(command); socketLog.info("--------------REQ--------------------"); writeTncCommand(command); } // Send Response message //It would be then „m + split + request + split + request-type“ function sendResponse(dxcallsign, mode, frames, data, command) { data = btoa_FD("m" + split_char + command + split_char + data); command = '{"type" : "arq", "command" : "send_raw", "parameter" : [{"dxcallsign" : "' + dxcallsign + '", "mode" : "' + mode + '", "n_frames" : "' + frames + '", "data" : "' + data + '", "attempts": "15"}]}'; socketLog.info(command); socketLog.info("--------------RES--------------------"); writeTncCommand(command); } //Send station info request exports.sendRequestInfo = function (dxcallsign) { //Command 0 = user/station information sendRequest(dxcallsign, 255, 1, "0", "req"); }; //Send station info response exports.sendResponseInfo = function (dxcallsign, userinfo) { //Command 0 = user/station information sendResponse(dxcallsign, 255, 1, userinfo, "res"); }; //STOP TRANSMISSION exports.stopTransmission = function () { command = '{"type" : "arq", "command": "stop_transmission"}'; writeTncCommand(command); }; // Get RX BUffer exports.getRxBuffer = function () { command = '{"type" : "get", "command" : "rx_buffer"}'; // call command only if new data arrived if (rxBufferLengthGui != rxBufferLengthTnc) { writeTncCommand(command); } }; // START BEACON exports.startBeacon = function (interval) { command = '{"type" : "broadcast", "command" : "start_beacon", "parameter": "' + interval + '"}'; writeTncCommand(command); }; // STOP BEACON exports.stopBeacon = function () { command = '{"type" : "broadcast", "command" : "stop_beacon"}'; writeTncCommand(command); }; // OPEN ARQ SESSION exports.connectARQ = function (dxcallsign) { command = '{"type" : "arq", "command" : "connect", "dxcallsign": "' + dxcallsign + '", "attempts": "15"}'; writeTncCommand(command); }; // CLOSE ARQ SESSION exports.disconnectARQ = function () { command = '{"type" : "arq", "command" : "disconnect"}'; writeTncCommand(command); }; // SEND TEST FRAME exports.sendTestFrame = function () { command = '{"type" : "set", "command" : "send_test_frame"}'; writeTncCommand(command); }; // SEND FEC exports.sendFEC = function (mode, payload) { command = '{"type" : "fec", "command" : "transmit", "mode" : "' + mode + '", "payload" : "' + payload + '"}'; writeTncCommand(command); }; // SEND FEC IS WRITING exports.sendFecIsWriting = function (mycallsign) { command = '{"type" : "fec", "command" : "transmit_is_writing", "mycallsign" : "' + mycallsign + '"}'; writeTncCommand(command); }; // RECORD AUDIO exports.record_audio = function () { command = '{"type" : "set", "command" : "record_audio"}'; writeTncCommand(command); }; // SET FREQUENCY exports.set_frequency = function (frequency) { command = '{"type" : "set", "command" : "frequency", "frequency": ' + frequency + "}"; writeTncCommand(command); }; // SET MODE exports.set_mode = function (mode) { command = '{"type" : "set", "command" : "mode", "mode": "' + mode + '"}'; console.log(command); writeTncCommand(command); }; ipcRenderer.on("action-update-tnc-ip", (event, arg) => { client.destroy(); let Data = { busy_state: "-", arq_state: "-", //channel_state: "-", frequency: "-", mode: "-", bandwidth: "-", dbfs_level: 0, }; ipcRenderer.send("request-update-tnc-state", Data); tnc_port = arg.port; tnc_host = arg.adress; connectTNC(); }); /** * String to base64 * @param {string} data in normal/usual utf-8 format * @returns base64 encoded string */ function btoa_FD(data) { return Buffer.from(data, "utf-8").toString("base64"); } /** * base64 to string * @param {string} data in base64 encoding * @returns utf-8 normal/usual string */ function atob_FD(data) { return Buffer.from(data, "base64").toString("utf-8"); } // https://stackoverflow.com/a/50579690 // crc32 calculation //console.log(crc32('abc')); //console.log(crc32('abc').toString(16).toUpperCase()); // hex var crc32 = function (r) { for (var a, o = [], c = 0; c < 256; c++) { a = c; for (var f = 0; f < 8; f++) a = 1 & a ? 3988292384 ^ (a >>> 1) : a >>> 1; o[c] = a; } for (var n = -1, t = 0; t < r.length; t++) n = (n >>> 8) ^ o[255 & (n ^ r.charCodeAt(t))]; return (-1 ^ n) >>> 0; };