51 lines
819 B
Go
51 lines
819 B
Go
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package lib
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import (
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"net"
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)
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// Sends a magic packet
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func SendPacket(from, to, macStr string) error {
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// Get a binary representation of that MAC Address
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mac, err := net.ParseMAC(macStr)
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if err != nil {
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return err
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}
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// Construct the Magic Packet
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packet := make([]byte, 102)
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index := 0
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for i := 0; i < 6; i++ {
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packet[index] = 0xFF
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index++
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}
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for i := 0; i < 16; i++ {
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for j := 0; j < 6; j++ {
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packet[index] = mac[j]
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index++
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}
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}
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// Resolve addresses
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localAddr, err := net.ResolveUDPAddr("udp4", from)
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if err != nil {
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return err
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}
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broadcastAddr, err := net.ResolveUDPAddr("udp4", to)
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if err != nil {
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return err
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}
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// Send packet
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conn, err := net.DialUDP("udp4", localAddr, broadcastAddr)
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if err != nil {
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return err
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}
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defer conn.Close()
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conn.Write(packet)
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return nil
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}
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