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33
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1 package main
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2
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3 import (
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40
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4 "bytes"
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5 "flag"
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6 "fmt"
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7 "net"
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8 "log"
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9 "os"
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33
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10 )
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11
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12 func main() {
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40
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13 var port int
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14 flag.IntVar(&port, "p", 9, "port")
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15 flag.Parse()
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16
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17 if flag.NArg() < 1 {
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18 fmt.Fprintln(os.Stderr, "magicpacket mac-address1 mac-address2 ...")
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19 fmt.Fprintln(os.Stderr, "magicpacket port mac-address1 mac-address2 ...")
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20 os.Exit(1)
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21 }
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22
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23 addr := fmt.Sprintf("255.255.255.255:%d", port)
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33
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24
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40
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25 for _, mac := range flag.Args() {
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26 hw, err := net.ParseMAC(mac)
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27 if err != nil {
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28 log.Fatal(err)
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29 }
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30 b := [][]byte{bytes.Repeat([]byte{255}, 6), bytes.Repeat([]byte(hw), 16)}
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31 pkt := bytes.Join(b, nil)
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32 conn, err := net.Dial("udp", addr)
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33 if err != nil {
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34 log.Fatal(err)
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35 }
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36 defer conn.Close()
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37 conn.Write(pkt)
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38 }
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33
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39 }
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40
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