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# EtherWake
Sending Wake-On-Lan magic packet using .net core
+
+```C#
+using System.Net;
+using System.Net.Sockets;
+
+/*
+ * Author: Alphons van der Heijden
+ * Date: nov 11, 2023
+ * Broadcasting WOL (Wake-On-Lan) packet 0x0842 https://en.wikipedia.org/wiki/EtherType
+ * Payload is mac address
+ *
+ * .net core 8
+ */
+
+var Mac = "DE:AD:BE:EF:12:34";
+
+if(args.Length == 0)
+{
+ Console.WriteLine($"Usage: EtherWake {Mac}");
+ return;
+}
+
+if (args.Length>0)
+ Mac = args[0];
+
+var client = new Socket(AddressFamily.InterNetwork, SocketType.Dgram, ProtocolType.Udp);
+
+await client.ConnectAsync(IPAddress.Broadcast, 0); // random port
+
+client.SetSocketOption(SocketOptionLevel.Socket, SocketOptionName.Broadcast, 1);
+
+byte[] broadcast = [ 0xff, 0xff, 0xff, 0xff, 0xff, 0xff ];
+
+var macaddress = Mac.Split(':').Select(x => Convert.ToByte(x, 16)).ToArray();
+
+byte[] ethertype = [ 0x08, 0x42 ];
+
+var arrays = new List<byte[]> { broadcast, macaddress, ethertype, broadcast };
+
+for(int i=0;i<16;i++)
+ arrays.Add(macaddress);
+
+var buffer = arrays.SelectMany(s => s).ToArray();
+
+int len = await client.SendAsync(buffer);
+
+var success = len == buffer.Length;
+
+Console.WriteLine($"sended WOL {success}");
+```