using System;
using System.Collections.Generic;
using System.Text;
using System.Net;
using System.Net.Sockets;
using System.Net.NetworkInformation;

namespace WoL_Manager
	{
	class Magic_Packet
		{
		private byte[] data;

		private int size;

		public Magic_Packet(string mac_adress)
			{
			size = 135;
			data = new byte[6];
			for (int t1 = 0; t1 < 6; t1++)
				{
				data[t1] = byte.Parse(mac_adress.Substring(t1 * 2, 2), System.Globalization.NumberStyles.HexNumber);
				}
			}

		public int getSerializeLength()
			{
			return size;
			}


		public int serialize(ref byte[] buffer, int index)
			{
			if (buffer.Length - index < size)
				{
				throw new Exception("ERROR:Buffer-Overflow detected");
				}
			for (int t = 0; t < 6; t++)
				{
				buffer[index+t] = 0xFF;
				}
			for (int t = 0; t < 16; t++)
				{
				Array.Copy(data, 0, buffer, index + 6 + 6 * t, 6);
				}
			char[] temp = "\0\0Wake on Lan provided by MatzMan".ToCharArray();
			for (int t = 0; t < 33; t++)
				{
				buffer[index + 102 + t] = Convert.ToByte(temp[t]);
				}
			return size;
			}


		public string getPayloadType()
			{
			return "WoL";
			}

		public static bool sendPacket(Host host)
			{
			int temp1;
			byte[] temp2;
			if (!MainWindow.checkMAC(host.MAC))
				{
				return false;
				}
			Magic_Packet packet = new Magic_Packet(host.MAC);
			temp1 = packet.getSerializeLength();
			temp2 = new byte[temp1];
			packet.serialize(ref temp2, 0);
			Socket socket = new Socket(AddressFamily.InterNetwork, SocketType.Raw, ProtocolType.Raw);
			socket.SetSocketOption(SocketOptionLevel.IP, SocketOptionName.AcceptConnection, false);
			socket.SetSocketOption(SocketOptionLevel.Socket, SocketOptionName.Broadcast, true);
			IPEndPoint ipepServer = new IPEndPoint(host.Broadcast, 0);
			EndPoint epServer = (ipepServer);
			int temp;
			for (int t1 = 0; t1 < 3; t1++)
				{
				temp = socket.SendTo(temp2, epServer);
				}
			return true;
			}

		}

	}