wakeonlan

wakeonlan-golang.go

package main

import (
	"encoding/hex"
	"fmt"
	"net"
	"strings"
)

func main() {
	mac := "000c29100678"
	port := 9
	ip := "255.255.255.255"
	macRepeat := strings.Repeat(mac, 16) // 16 * 6 = 96 bytes
	macBytes, err := hex.DecodeString(macRepeat)
	if err != nil {
		panic(err)
	}
	packet := make([]byte, 0, 102) // 6+16*6=102 (mac address is 6 bytes too)
	packet = append(packet, []byte(strings.Repeat("\xFF", 6))...)
	packet = append(packet, macBytes...)
	conn, err := net.Dial("udp", fmt.Sprintf("%v:%d", ip, port))
	if err != nil {
		panic(err)
	}
	if n, err := conn.Write(packet); err != nil && n != 102 {
		panic(fmt.Errorf("magic packet sent was %d bytes (expected 102 bytes sent)", n))
	}
	if err = conn.Close(); err != nil {
		panic(err)
	}
}