Created
September 9, 2022 13:05
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Simple Node.js proxy
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#!/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); | |
}); |
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