some changes

package-lock.json

@@ -1,12 +1,12 @@
 {
   "name": "fm-dx-webserver",
-  "version": "1.4.0",
+  "version": "1.4.0a",
   "lockfileVersion": 3,
   "requires": true,
   "packages": {
     "": {
       "name": "fm-dx-webserver",
-      "version": "1.4.0",
+      "version": "1.4.0a",
       "license": "ISC",
       "dependencies": {
         "@mapbox/node-pre-gyp": "2.0.3",
@@ -17,7 +17,6 @@
         "ffmpeg-static": "5.3.0",
         "figlet": "^1.10.0",
         "http": "0.0.1-security",
-        "koffi": "2.7.2",
         "net": "1.0.2",
         "serialport": "13.0.0",
         "ws": "8.19.0"
@@ -1168,13 +1167,6 @@
         "node": ">=10"
       }
     },
-    "node_modules/koffi": {
-      "version": "2.7.2",
-      "resolved": "https://registry.npmjs.org/koffi/-/koffi-2.7.2.tgz",
-      "integrity": "sha512-AWcsEKETQuELxK0Wq/aXDkDiNFFY41TxZQSrKm2Nd6HO/KTHeohPOOIlh2OfQnBXJbRjx5etpWt8cbqMUZo2sg==",
-      "hasInstallScript": true,
-      "license": "MIT"
-    },
     "node_modules/lru-cache": {
       "version": "6.0.0",
       "resolved": "https://registry.npmjs.org/lru-cache/-/lru-cache-6.0.0.tgz",

server/chat.js

@@ -16,7 +16,7 @@ function createChatServer(storage) {
         ws.isAlive = true;
         ws.on('pong', heartbeat);
 
-        const clientIp = request.headers['x-forwarded-for'] || request.socket.remoteAddress;
+        const clientIp = helpers.getIpAddress(request);
         const userCommandHistory = {};
 
         if (serverConfig.webserver.banlist?.includes(clientIp)) {

server/console.js

@@ -21,6 +21,7 @@ const MESSAGE_PREFIX = {
     FFMPEG: "\x1b[36m[FFMPEG]\x1b[0m",
     INFO: "\x1b[32m[INFO]\x1b[0m",
     WARN: "\x1b[33m[WARN]\x1b[0m",
+    SECURITY: "\x1b[36m[SECURITY]\x1b[0m",
 };
 
 const getCurrentTime = () => {
@@ -44,6 +45,7 @@ const logMessage = (type, messages) => {
     if(type !== 'FFMPEG') appendLogToBuffer(logMessage);
 };
 
+const logSecurity = (...messages) => logMessage('SECURITY', messages);
 const logDebug = (...messages) => logMessage('DEBUG', messages);
 const logChat = (message) => logMessage('CHAT', [`${message.nickname} (${message.ip}) sent a chat message: ${message.message}`]);
 const logError = (...messages) => logMessage('ERROR', messages);
@@ -87,4 +89,4 @@ process.on('exit', flushLogBuffer);
 process.on('SIGINT', gracefulExit);
 process.on('SIGTERM', gracefulExit);
 
-module.exports = { logError, logDebug, logFfmpeg, logInfo, logWarn, logs, logChat };
+module.exports = { logError, logDebug, logFfmpeg, logInfo, logWarn, logs, logChat, logSecurity };

server/datahandler.js

@@ -106,8 +106,8 @@ function handleData(wss, receivedData, rdsWss) {
       case receivedLine.startsWith('T'): // Frequency
         modifiedData = receivedLine.substring(1).split(",")[0];
 
-        rdsReset();
         if((modifiedData / 1000).toFixed(3) == dataToSend.freq) return; // Prevent tune spamming using scrollwheel
+        rdsReset();
 
         parsedValue = parseFloat(modifiedData);
 

server/endpoints.js

@@ -19,10 +19,10 @@ const allPluginConfigs = require('./plugins');
 
 // Endpoints
 router.get('/', (req, res) => {
-    let requestIp = req.headers['x-forwarded-for'] || req.socket.remoteAddress;
+    let requestIp = helpers.getIpAddress(req);
 
     const normalizedIp = requestIp?.replace(/^::ffff:/, '');
-    const ipList = (normalizedIp || '').split(',').map(ip => ip.trim()).filter(Boolean); // in case there are multiple IPs (proxy), we need to check all of them
+    const ipList = (normalizedIp || '').split(',').map(ip => ip.trim()).filter(Boolean); // in case there are multiple IPs (proxy), we need to check all of them (No we don't)
     
     const banEntry = serverConfig.webserver.banlist.find(banEntry => ipList.includes(banEntry[0]));
     
@@ -385,7 +385,7 @@ router.get('/log_fmlist', (req, res) => {
         return;
     }
 
-    const clientIp = req.headers['x-forwarded-for'] || req.connection.remoteAddress;
+    const clientIp = helpers.getIpAddress(req);
     const txId = dataHandler.dataToSend.txInfo.id; // Extract the ID
 
     if (!canLog(txId)) {

server/helpers.js

@@ -343,10 +343,24 @@ function findServerFiles(plugins) {
   return results;
 }
 
+function getIpAddress(request) {
+  const remoteIp = request.socket.remoteAddress;
+  const xff = request.headers['x-forwarded-for'];
+
+  // If X-Forwarded-For is present but request is NOT from a trusted proxy → suspicious
+  if (xff && !serverConfig.trustedProxies.includes(remoteIp)) {
+    consoleCmd.logSecurity(`Untrusted proxy tried to set X-Forwarded-For: ${xff} (remote: ${remoteIp})`);
+    return remoteIp;
+  }
+
+  if (xff && serverConfig.trustedProxies.includes(remoteIp)) return xff.split(',')[0].trim();
+  return remoteIp;
+}
+
 module.exports = {
   authenticateWithXdrd, parseMarkdown, handleConnect,
   removeMarkdown, formatUptime, resolveDataBuffer,
   kickClient, checkIPv6Support, checkLatency,
   antispamProtection, escapeHtml, findServerFiles,
-  startPluginsWithDelay
+  startPluginsWithDelay, getIpAddress
 }

server/index.js

@@ -301,7 +301,7 @@ setInterval(() => {
 
 wss.on('connection', (ws, request) => {
     const output = serverConfig.xdrd.wirelessConnection ? client : serialport;
-    let clientIp = request.headers['x-forwarded-for'] || request.socket.remoteAddress;
+    let clientIp = helpers.getIpAddress(request);
     const userCommandHistory = {};
     const normalizedClientIp = clientIp?.replace(/^::ffff:/, '');
   
@@ -486,7 +486,7 @@ wss.on('connection', (ws, request) => {
 
 // Additional web socket for using plugins
 pluginsWss.on('connection', (ws, request) => {
-    const clientIp = request.headers['x-forwarded-for'] || request.socket.remoteAddress;
+    const clientIp = helpers.getIpAddress(request);
     const userCommandHistory = {};
     if (serverConfig.webserver.banlist?.includes(clientIp)) {
       ws.close(1008, 'Banned IP');
@@ -524,7 +524,7 @@ pluginsWss.on('connection', (ws, request) => {
 
 // Websocket register for /text, /audio and /chat paths
 httpServer.on('upgrade', (request, socket, head) => { 
-  const clientIp = request.headers['x-forwarded-for'] || request.socket.remoteAddress;
+  const clientIp = helpers.getIpAddress(request);
   if (serverConfig.webserver.banlist?.includes(clientIp)) {
     socket.destroy();
     return;

server/rds.js

@@ -232,12 +232,20 @@ class RDSDecoder {
 
         if(d_error > 2) return; // Don't risk it
 
+        
         const idx = blockB & 0x3;
+        
+        const last_err = this.ps_errors[idx * 2];
+        const cur_err = Math.ceil(d_error * (10/3));
+        const character_a = decode_charset(blockD >> 8);
+        const character_b = decode_charset(blockD & 0xFF);
 
-        this.ps[idx * 2] = decode_charset(blockD >> 8);
+        if(last_err < cur_err && this.ps[idx * 2] == character_a && this.ps[idx * 2 + 1] == character_b) return;
-        this.ps[idx * 2 + 1] = decode_charset(blockD & 0xFF);
+
-        this.ps_errors[idx * 2] = Math.ceil(d_error * (10/3));
+        this.ps[idx * 2] = character_a;
-        this.ps_errors[idx * 2 + 1] = Math.ceil(d_error * (10/3));
+        this.ps[idx * 2 + 1] = character_b;
+        this.ps_errors[idx * 2] = cur_err;
+        this.ps_errors[idx * 2 + 1] = cur_err;
 
         this.data.ps = this.ps.join('');
         this.data.ps_errors = this.ps_errors.join(',');

server/rds_country.js

@@ -105,7 +105,7 @@ var countries = [
     "Turkey",
     "Palestine",
     "Turkmenistan",
-    "Poland",
+    "Rzeczpospolita Polska",
     "Uganda",
     "Portugal",
     "Ukraine",
@@ -539,7 +539,7 @@ const rdsEccE0E5Lut = [
   ],
   // E2
   [
-    "Morocco", "Czechia", "Poland", "Vatican", "Slovakia",
+    "Morocco", "Czechia", "Rzeczpospolita Polska", "Vatican", "Slovakia",
     "Syria", "Tunisia", "", "Liechtenstein", "Iceland",
     "Monaco", "Lithuania", "Serbia", "Spain", "Norway"
   ],

server/server_config.js

@@ -126,7 +126,8 @@ let serverConfig = {
   stereoNoUsers: "0",
   antennaStartup: "0",
   antennaNoUsers: "0",
-  antennaNoUsersDelay: false
+  antennaNoUsersDelay: false,
+  trustedProxies: []
 };
 
 // Function to add missing fields without overwriting existing values

server/stream/ws.js

@@ -1,11 +1,12 @@
 const WebSocket = require('ws');
 const { serverConfig } = require('../server_config');
 const audio_pipe = require('./index.js');
+const { getIpAddress } = require("../helpers.js")
 
 const audioWss = new WebSocket.Server({ noServer: true, skipUTF8Validation: true });
 
 audioWss.on('connection', (ws, request) => {
-    const clientIp = request.headers['x-forwarded-for'] || request.socket.remoteAddress;
+    const clientIp = getIpAddress(request);
 
     if (serverConfig.webserver.banlist?.includes(clientIp)) {
         ws.close(1008, 'Banned IP');

server/tx_search.js

@@ -26,7 +26,6 @@ const WebSocket = require('ws');
 // Get weighting values based on algorithm setting.
 // Defaults = algorithm 1
 let weightedErp = 10;
-let weightedDist = 400;
 const algorithms = [
     [10, 400],
     [30, 500],
@@ -268,7 +267,11 @@ async function fetchTx(freq, piCode, rdsPs) {
     if (filteredLocations.length > 1) {
         const extraFilteredLocations = filteredLocations.map(locData => ({
             ...locData,
-            stations: locData.stations.filter(station => (station.ps?.toLowerCase() === rdsPs.replace(/ /g, '_').toLowerCase()))
+            stations: locData.stations.filter(station => 
+                station.ps?.toLowerCase().includes(
+                    rdsPs.replace(/ /g, '_').toLowerCase()
+                ) ?? false
+            )
         })).filter(locData => locData.stations.length > 0);
 
         if (extraFilteredLocations.length > 0) filteredLocations = extraFilteredLocations;
@@ -370,8 +373,7 @@ function haversine(lat1, lon1, lat2, lon2) {
 
     const y = Math.sin(dLon) * Math.cos(deg2rad(lat2));
     const x = Math.cos(deg2rad(lat1)) * Math.sin(deg2rad(lat2)) - Math.sin(deg2rad(lat1)) * Math.cos(deg2rad(lat2)) * Math.cos(dLon);
-    const azimuth = Math.atan2(y, x);
+    const azimuthDegrees = (Math.atan2(y, x) * 180 / Math.PI + 360) % 360;
-    const azimuthDegrees = (azimuth * 180 / Math.PI + 360) % 360;
 
     return {
         distanceKm: distance,

web/403.ejs

@@ -21,7 +21,7 @@
                 <br>
                 <i class="text-big fa-solid fa-exclamation-triangle color-4"></i>
                 <p>
-                    There's a possibility you were kicked by the system.<br>
+                    The service has rejected you.<br>
                     Please try again later.</p>
 
             <% if (reason) { %>

web/index.ejs

@@ -562,7 +562,7 @@
             <div class="hover-brighten br-0 bg-color-1" style="height: 50px;padding:12px;" onclick="window.open('https://buymeacoffee.com/noobish')">
               <strong>Support</strong> the developer!
             </div>
-            <div class="hover-brighten br-0 bg-color-1" style="height: 50px;padding:12px;" onclick="window.open('https://discord.com/invite/ZAVNdS74mC')">
+            <div class="hover-brighten br-0 bg-color-1" style="height: 50px;padding:12px;" onclick="window.open('https://discord.gg/cY66nt6UhV')">
               Join our <strong>FMDX.org Discord</strong> community!
             </div>
           </div>