Simple Node.js proxy

proxy.js

#!/usr/bin/env node
const net = require("net");
const serverClientHost = "192.168.88.79"; // P->S
const serverClientPort = 22;
const proxyServerPort = 1337; // C->S
const proxyServer = new net.Server();
proxyServer.on("connection", (socket) => {
	console.log("[C-P] new connection");
	console.log(socket.address());
	let serverClient = new net.Socket();
	let queue = [];
	let popQueue = () => {
		if (!serverClient.connecting && !serverClient.destroyed) {
			if (queue.length > 0) {
				serverClient.write(queue.pop());
			}
		}
	}
	serverClient.on("ready", () => {
		console.log("[P-S] connected");
		popQueue();
	});
	socket.on("data", data => {
		console.log("[C->P->S] write data");
		queue.push(data);
		popQueue();
	});
	serverClient.on("data", data => {
		console.log("[S->P->C] write data");
		if (!socket.destroyed) return;
		socket.write(data);
	});
	socket.on("end", () => {
		console.log("[C-P] connection closed");
		socket.destroy();
		serverClient.destroy();
	});
	serverClient.on("end", () => {
		console.log("[P-S] connection closed");
		socket.destroy();
		serverClient.destroy();
	});
	socket.on("error", (err) => {
		console.log("[C-P] connection error");
		console.log(err);
		socket.destroy();
		serverClient.destroy();
	});
	serverClient.on("error", (err) => {
		console.log("[P-S] connection error");
		console.log(err);
		socket.destroy();
		serverClient.destroy();
	});
});
proxyServer.listen(proxyServerPort, () => {
	console.log("proxy listening on port", proxyServerPort);
});