package main

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

 var localServerHost = "localhost:8880"
 var remoteServerHost = "www.facebook.com:80"

 func main() {

 	ln, err := net.Listen("tcp", localServerHost)
 	if err != nil {
 		log.Fatal(err)
 	}

 	log.Println("Port forwarding server up and listening on ", localServerHost)

 	for {
 		conn, err := ln.Accept()
 		if err != nil {
 			log.Fatal(err)
 		}

 		go handleConnection(conn)
 	}
 }

 func forward(src, dest net.Conn) {
 	defer src.Close()
 	defer dest.Close()
 	io.Copy(src, dest)
 }

 func handleConnection(c net.Conn) {

 	log.Println("Connection from : ", c.RemoteAddr())

 	remote, err := net.Dial("tcp", remoteServerHost)
 	if err != nil {
 		log.Fatal(err)
 	}

 	log.Println("Connected to ", remoteServerHost)

 	// go routines to initiate bi-directional communication for local server with a
 	// remote server
 	go forward(c, remote)
 	go forward(remote, c)
 }