fix(PortProxy): Refactor connection tracking to utilize unified records in PortProxy

ts/00_commitinfo_data.ts

@@ -3,6 +3,6 @@
  */
 export const commitinfo = {
   name: '@push.rocks/smartproxy',
-  version: '3.10.3',
+  version: '3.10.4',
   description: 'a proxy for handling high workloads of proxying'
 }

ts/smartproxy.portproxy.ts

@@ -79,12 +79,19 @@ function extractSNI(buffer: Buffer): string | undefined {
   return undefined;
 }
 
+interface IConnectionRecord {
+  incoming: plugins.net.Socket;
+  outgoing: plugins.net.Socket | null;
+  incomingStartTime: number;
+  outgoingStartTime?: number;
+  connectionClosed: boolean;
+}
+
 export class PortProxy {
   netServer: plugins.net.Server;
   settings: IProxySettings;
-  private activeConnections: Set<plugins.net.Socket> = new Set();
-  private incomingConnectionTimes: Map<plugins.net.Socket, number> = new Map();
-  private outgoingConnectionTimes: Map<plugins.net.Socket, number> = new Map();
+  // Unified record tracking each connection pair.
+  private connectionRecords: Set<IConnectionRecord> = new Set();
   private connectionLogger: NodeJS.Timeout | null = null;
 
   private terminationStats: {
@@ -140,29 +147,26 @@ export class PortProxy {
 
     this.netServer = plugins.net.createServer((socket: plugins.net.Socket) => {
       const remoteIP = socket.remoteAddress || '';
-      this.activeConnections.add(socket);
-      this.incomingConnectionTimes.set(socket, Date.now());
-      console.log(`New connection from ${remoteIP}. Active connections: ${this.activeConnections.size}`);
+      const connectionRecord: IConnectionRecord = {
+        incoming: socket,
+        outgoing: null,
+        incomingStartTime: Date.now(),
+        connectionClosed: false,
+      };
+      this.connectionRecords.add(connectionRecord);
+      console.log(`New connection from ${remoteIP}. Active connections: ${this.connectionRecords.size}`);
 
       let initialDataReceived = false;
       let incomingTerminationReason: string | null = null;
       let outgoingTerminationReason: string | null = null;
-      let targetSocket: plugins.net.Socket | null = null;
-      let connectionClosed = false;
 
-      // Ensure cleanup happens only once.
+      // Ensure cleanup happens only once for the entire connection record.
       const cleanupOnce = () => {
-        if (!connectionClosed) {
-          connectionClosed = true;
-          cleanUpSockets(socket, targetSocket || undefined);
-          this.incomingConnectionTimes.delete(socket);
-          if (targetSocket) {
-            this.outgoingConnectionTimes.delete(targetSocket);
-          }
-          if (this.activeConnections.has(socket)) {
-            this.activeConnections.delete(socket);
-            console.log(`Connection from ${remoteIP} terminated. Active connections: ${this.activeConnections.size}`);
-          }
+        if (!connectionRecord.connectionClosed) {
+          connectionRecord.connectionClosed = true;
+          cleanUpSockets(connectionRecord.incoming, connectionRecord.outgoing || undefined);
+          this.connectionRecords.delete(connectionRecord);
+          console.log(`Connection from ${remoteIP} terminated. Active connections: ${this.connectionRecords.size}`);
         }
       };
 
@@ -242,10 +246,10 @@ export class PortProxy {
           connectionOptions.localAddress = remoteIP.replace('::ffff:', '');
         }
 
-        targetSocket = plugins.net.connect(connectionOptions);
-        if (targetSocket) {
-          this.outgoingConnectionTimes.set(targetSocket, Date.now());
-        }
+        const targetSocket = plugins.net.connect(connectionOptions);
+        connectionRecord.outgoing = targetSocket;
+        connectionRecord.outgoingStartTime = Date.now();
+
         console.log(
           `Connection established: ${remoteIP} -> ${targetHost}:${this.settings.toPort}` +
           `${serverName ? ` (SNI: ${serverName})` : ''}`
@@ -314,20 +318,19 @@ export class PortProxy {
         );
       });
 
-    // Log active connection count, longest running connection durations,
-    // and termination statistics every 10 seconds.
+    // Every 10 seconds log active connection count and longest running durations.
     this.connectionLogger = setInterval(() => {
       const now = Date.now();
       let maxIncoming = 0;
-      for (const startTime of this.incomingConnectionTimes.values()) {
-        maxIncoming = Math.max(maxIncoming, now - startTime);
-      }
       let maxOutgoing = 0;
-      for (const startTime of this.outgoingConnectionTimes.values()) {
-        maxOutgoing = Math.max(maxOutgoing, now - startTime);
+      for (const record of this.connectionRecords) {
+        maxIncoming = Math.max(maxIncoming, now - record.incomingStartTime);
+        if (record.outgoingStartTime) {
+          maxOutgoing = Math.max(maxOutgoing, now - record.outgoingStartTime);
+        }
       }
       console.log(
-        `(Interval Log) Active connections: ${this.activeConnections.size}. ` +
+        `(Interval Log) Active connections: ${this.connectionRecords.size}. ` +
         `Longest running incoming: ${plugins.prettyMs(maxIncoming)}, outgoing: ${plugins.prettyMs(maxOutgoing)}. ` +
         `Termination stats (incoming): ${JSON.stringify(this.terminationStats.incoming)}, ` +
         `(outgoing): ${JSON.stringify(this.terminationStats.outgoing)}`