Refactor socket handling in forwarding handlers to use centralized utilities and remove deprecated functions

ts/core/utils/socket-utils.ts

@@ -67,37 +67,6 @@ export function cleanupSocket(
   });
 }
 
-/**
- * Create a cleanup handler for paired sockets (client and server)
- * @param clientSocket The client socket
- * @param serverSocket The server socket (optional)
- * @param onCleanup Optional callback when cleanup is done
- * @returns A cleanup function that can be called multiple times safely
- * @deprecated Use createIndependentSocketHandlers for better half-open support
- */
-export function createSocketCleanupHandler(
-  clientSocket: plugins.net.Socket | plugins.tls.TLSSocket,
-  serverSocket?: plugins.net.Socket | plugins.tls.TLSSocket | null,
-  onCleanup?: (reason: string) => void
-): (reason: string) => void {
-  let cleanedUp = false;
-  
-  return (reason: string) => {
-    if (cleanedUp) return;
-    cleanedUp = true;
-    
-    // Cleanup both sockets (old behavior - too aggressive)
-    cleanupSocket(clientSocket, 'client', { immediate: true });
-    if (serverSocket) {
-      cleanupSocket(serverSocket, 'server', { immediate: true });
-    }
-    
-    // Call cleanup callback if provided
-    if (onCleanup) {
-      onCleanup(reason);
-    }
-  };
-}
 
 /**
  * Create independent cleanup handlers for paired sockets that support half-open connections
@@ -278,19 +247,6 @@ export function setupBidirectionalForwarding(
   return { cleanupClient, cleanupServer };
 }
 
-/**
- * Pipe two sockets together with proper cleanup on either end
- * @param socket1 First socket
- * @param socket2 Second socket
- */
-export function pipeSockets(
-  socket1: plugins.net.Socket | plugins.tls.TLSSocket,
-  socket2: plugins.net.Socket | plugins.tls.TLSSocket
-): void {
-  socket1.pipe(socket2);
-  socket2.pipe(socket1);
-}
-
 /**
  * Create a socket with immediate error handling to prevent crashes
  * @param options Socket creation options