Tiny TCP proxy

proxy.go

package main

import (
	"io"
	"log"
	"net"
	"time"
)

var ListenHost = ":1234"
var TargetHost = "192.168.1.108:22"
var Timeout = time.Second * 5

func main() {
	listener, _ := net.Listen("tcp", ListenHost)
	for {
		conn, err := listener.Accept()
		if err != nil {
			log.Println(err)
			return
		}
		go func() {
			localConn, err := net.DialTimeout("tcp", TargetHost, Timeout)
			if err != nil {
				log.Println(err)
				conn.Close()
				return
			}
			go func() {
				io.Copy(conn, localConn)
				conn.Close()
			}()
			go func() {
				io.Copy(localConn, conn)
				localConn.Close()
			}()
		}()
	}
}