move GeoIP functions into it's own class

extract the geoip database .gz in-game

OpenRA.Game/Network/GeoIP.cs

@@ -0,0 +1,52 @@
+#region Copyright & License Information
+/*
+ * Copyright 2007-2015 The OpenRA Developers (see AUTHORS)
+ * This file is part of OpenRA, which is free software. It is made
+ * available to you under the terms of the GNU General Public License
+ * as published by the Free Software Foundation. For more information,
+ * see COPYING.
+ */
+#endregion
+
+using System;
+using System.IO;
+using ICSharpCode.SharpZipLib.Core;
+using ICSharpCode.SharpZipLib.GZip;
+using MaxMind.GeoIP2;
+
+namespace OpenRA.Network
+{
+	public class GeoIP
+	{
+		static DatabaseReader database;
+
+		public static void Initialize()
+		{
+			try
+			{
+				using (var fileStream = new FileStream("GeoLite2-Country.mmdb.gz", FileMode.Open, FileAccess.Read))
+					using (var gzipStream = new GZipInputStream(fileStream))
+						database = new DatabaseReader(gzipStream);
+			}
+			catch (Exception e)
+			{
+				Log.Write("geoip", "DatabaseReader failed: {0}", e);
+			}
+		}
+
+		public static string LookupCountry(string ip)
+		{
+			const string Unknown = "Unknown Location";
+
+			try
+			{
+				return database.Country(ip).Country.Name ?? Unknown;
+			}
+			catch (Exception e)
+			{
+				Log.Write("geoip", "LookupCountry failed: {0}", e);
+				return Unknown;
+			}
+		}
+	}
+}