const net = require("net")
const {spawn,exec} = require("child_process");
const portlist = [21,1433,7777]
const host = "0.0.0.0";
servermap = new Map()

portlist.forEach(i => {
    // create server
    server = net.createServer()
    // listen on port
    server.listen(i, host, () => {
        console.log(`TCP Server listening on ${host}:${i}`);
    })
    // defining connection event
    server.on("connection", a => {
        console.log(`incomming connection from : ${a.remoteAddress} on port ${i}`)
        // handle error even on socket instance (prevents the econnreset error)
        a.on("error", () => {})
        // Handle banning ip


        // const output = spawn("echo", [`-A INPUT -s ${a.remoteAddress} -j DROP`]);
        // output.stdout.on("data", () => {console.log(data);})



        exec(`echo -A INPUT -s ${a.remoteAddress} -j DROP`, (error, stdout, stderr) => {
            if (error) {
                console.log(`error: ${error.message}`);
                return;
            }
            if (stderr) {
                console.log(`stderr: ${stderr}`);
                return;
            }
            console.log(`stdout: ${stdout}`);
        });
    })
    servermap.set(i, server)
})



process.on('uncaughtException', function (err) {
    console.log(err);
});