package main

import "net"
import "log"

func main() {
    ln, err := net.Listen("tcp", ":3000")
    checkErr(err)
    for {
        conn, err := ln.Accept()
        checkErr(err)
        go handleConnection(conn)
    }
}

func handleConnection(conn net.Conn) {
    incomingBytes := make([]byte, 256)
    _, err := conn.Read(incomingBytes)
    if err != nil {
        conn.Close()
        return
    }
    conn.Write(incomingBytes)
    handleConnection(conn)
}

func checkErr(err error) {
    if err != nil {
        log.Fatal("Error: ", err)
    }
}