Merge pull request #2996 from Mailaender/serverbrowser-usability

Added filters and ping to server browser

OpenRA.Game/Network/GameServer.cs

@@ -10,6 +10,8 @@
 
 using System.Collections.Generic;
 using System.Linq;
+using System.Net.NetworkInformation;
+using System.Threading;
 
 namespace OpenRA.Network
 {
@@ -65,5 +67,33 @@ namespace OpenRA.Network
 			return UsefulMods.All(m => Game.CurrentMods.ContainsKey(m.Key)
 				&& AreVersionsCompatible(m.Value, Game.CurrentMods[m.Key].Version));
 		}
+
+		public int Latency = -1;
+		bool hasBeenPinged;
+		public void Ping()
+		{
+			if (!hasBeenPinged)
+			{
+				hasBeenPinged = true;
+				var pingSender = new Ping();
+				pingSender.PingCompleted += new PingCompletedEventHandler(pongRecieved);
+				AutoResetEvent waiter = new AutoResetEvent(false);
+				pingSender.SendAsync(Address.Split(':')[0], waiter);
+			}
+		}
+
+		void pongRecieved(object sender, PingCompletedEventArgs e)
+		{
+			if (e.Cancelled || e.Error != null)
+				Latency = -1;
+			else
+			{
+				PingReply pong = e.Reply;
+				if (pong != null && pong.Status == IPStatus.Success)
+					Latency = (int)pong.RoundtripTime;
+				else
+					Latency = -1;
+			}
+		}
 	}
 }