package main

import (
	"fmt"
	"net"
	"strings"
)

func main() {
	serv, err := net.ListenPacket("udp4", ":8888")

	if err != nil {
		panic(err)
	}

	defer serv.Close()

	buff := make([]byte, 2048)

	for {

		n, addr, err := serv.ReadFrom(buff)
		if err != nil {
			panic(err)
		}

		remoteAddr := strings.Split(addr.String(), ":")

		remote, err := net.ResolveUDPAddr("udp4", remoteAddr[0] + ":8850")

		if err != nil {
			panic(err)
		}

		conn, _ := net.DialUDP("udp4", nil, remote)
		defer conn.Close()

		conn.Write([]byte("Hello"))
		conn.Close()

		fmt.Printf("%s sent this: %s\n", addr, buff[:n])

	}
}