Scalable Server Events with .NET UDP Sockets

using System;
using System.Net;
using System.Net.Sockets;
using UDPEvents.AppCommands;

namespace UDPEvents.UDP
{
	/// <summary>
	/// Class to braodcast UDP Commands. Normally you would just use the UDPClient class, but
	/// for our demo app we want to be able to run multiple copies of the apps on the same machine,
	/// and therefore they each need their own UDP port
	/// </summary>
	public class UDPBroadcaster
	{
		private static void SendCommand(AppCommand cmd, int port, string hostName)
		{
			byte[] data = AppCommandTranslator.ToBinary(cmd);
			UdpClient sender = new UdpClient();
			IPAddress endAddress = IPAddress.Broadcast;
			if (hostName != null)
			{
				IPHostEntry host = Dns.GetHostByName(hostName);
				if (host != null && host.AddressList != null && host.AddressList.Length > 0)
					endAddress = host.AddressList[0];
			}
			IPEndPoint end = new IPEndPoint(endAddress, port);
			sender.Send(data, data.Length, end);
		}
			
		
		/// <summary>
		/// Routine to broadcast to one specific machine. Assumes that this machine is the server
		/// and as such only broadcasts on one port
		/// </summary>
		public static void BroadcastCommand(AppCommand cmd, string hostName)
		{
			SendCommand(cmd, UDPPorts.ServerPort(), hostName);
		}

		/// <summary>
		/// Routine to broadcast to the whole network. Broadcasts on the server, manager and all client
		/// ports
		/// </summary>
		public static void BroadcastCommand(AppCommand cmd)
		{
			SendCommand(cmd, UDPPorts.ServerPort(), null);
			SendCommand(cmd, UDPPorts.ManagerPort(), null);
			for(int i = 0; i < Consts.MaxClients; i++)
			{
				SendCommand(cmd, UDPPorts.ClientPort(i), null);	
			}
		}
	}
}