UDP Server with Golang

udp_server.go

package udp_server

import (
	"errors"
	"log"
	"net"
)

type UDPServer struct {
	Addr    string
	server  *net.UDPConn
}

type Packet struct {
	Port  int
	Body  []byte
}

func (u *UDPServer) Run() (err error) {
	srcAddr, err := net.ResolveUDPAddr("udp", u.Addr)
	if err != nil {
		return errors.New("could not resolve UDP addr")
	}

	u.server, err = net.ListenUDP("udp", srcAddr)
	if err != nil {
		return errors.New("could not listen on UDP")
	}

	return u.handleConnections()
}

func (u *UDPServer) handleConnections() error {
	var err error
	for {
		buf := make([]byte, 1024)
		n, conn, err := u.server.ReadFromUDP(buf)
		if err != nil {
			log.Println(err)
			break
		}
		if conn == nil {
			continue
		}

		go u.handleConnection(conn, buf[:n])
	}
	return err
}

func (u *UDPServer) handleConnection(addr *net.UDPAddr, cmd []byte) *Packet {
	packet := &Packet{}
	packet.Port = addr.Port
	packet.Body = cmd
	return packet
}


func (u *UDPServer) Close() error {
	err := u.Close()
	if err != nil {
		return err
	}
	return nil
}