v2 init commit

src/mod/wakeonlan/wakeonlan.go

@@ -0,0 +1,68 @@
+package wakeonlan
+
+import (
+	"errors"
+	"net"
+	"time"
+)
+
+/*
+	Wake On Lan
+	Author: tobychui
+
+	This module send wake on LAN signal to a given MAC address
+	and do nothing else
+*/
+
+type magicPacket [102]byte
+
+func WakeTarget(macAddr string) error {
+	packet := magicPacket{}
+	mac, err := net.ParseMAC(macAddr)
+	if err != nil {
+		return err
+	}
+
+	if len(mac) != 6 {
+		return errors.New("invalid MAC address")
+	}
+
+	//Initialize the packet with all F
+	copy(packet[0:], []byte{255, 255, 255, 255, 255, 255})
+	offset := 6
+
+	for i := 0; i < 16; i++ {
+		copy(packet[offset:], mac)
+		offset += 6
+	}
+
+	//Most devices listen to either port 7 or 9, send to both of them
+	err = sendPacket("255.255.255.255:7", packet)
+	if err != nil {
+		return err
+	}
+
+	time.Sleep(30 * time.Millisecond)
+
+	err = sendPacket("255.255.255.255:9", packet)
+	if err != nil {
+		return err
+	}
+	return nil
+}
+
+func sendPacket(addr string, packet magicPacket) error {
+	conn, err := net.Dial("udp", addr)
+	if err != nil {
+		return err
+	}
+	defer conn.Close()
+
+	_, err = conn.Write(packet[:])
+	return err
+}
+
+func IsValidMacAddress(macaddr string) bool {
+	_, err := net.ParseMAC(macaddr)
+	return err == nil
+}