Stuff

using System;
using System.Net;
using System.Net.Sockets;
using Server;
using Server.Network;

namespace Server.Misc
{
    public class ServerList
    {
        /* Address:
         * 
         * The default setting, a value of 'null', will attempt to detect your IP address automatically:
         * private const string Address = null;
         * 
         * This detection, however, does not work for servers behind routers. If you're running behind a router, put in your IP:
         * private const string Address = "12.34.56.78";
         * 
         * If you need to resolve a DNS host name, you can do that too:
         * private const string Address = "192.168.1.100";
         */

        public const string Address = "82.171.74.86";

        public const string ServerName = "DemonSwarm";

        public static void Initialize()
        {
            Listener.Port = 2593;

            EventSink.ServerList += new ServerListEventHandler( EventSink_ServerList );
        }

        public static void EventSink_ServerList( ServerListEventArgs e )
        {
            try
            {
                IPAddress ipAddr;

                if ( Resolve( Address != null && !IsLocalMachine( e.State ) ? Address : Dns.GetHostName(), out ipAddr ) )
                    e.AddServer( ServerName, new IPEndPoint( ipAddr, Listener.Port ) );
                else
                    e.Rejected = true;
            }
            catch
            {
                e.Rejected = true;
            }
        }

        public static bool Resolve( string addr, out IPAddress outValue )
        {
            try
            {
                outValue = IPAddress.Parse( addr );
                return true;
            }
            catch
            {
                try
                {
                    IPHostEntry iphe = Dns.Resolve( addr );

                    if ( iphe.AddressList.Length > 0 )
                    {
                        outValue = iphe.AddressList[iphe.AddressList.Length - 1];
                        return true;
                    }
                }
                catch
                {
                }
            }

            outValue = IPAddress.None;
            return false;
        }

        private static bool IsLocalMachine( NetState state )
        {
            Socket sock = state.Socket;

            IPAddress theirAddress = ((IPEndPoint)sock.RemoteEndPoint).Address;

            if ( IPAddress.IsLoopback( theirAddress ) )
                return true;

            bool contains = false;
            IPHostEntry iphe = Dns.Resolve( Dns.GetHostName() );

            for ( int i = 0; !contains && i < iphe.AddressList.Length; ++i )
                contains = theirAddress.Equals( iphe.AddressList[i] );

            return contains;
        }
    }
}