Initial commit: OpenRA game engine

Fork from OpenRA/OpenRA with one-click launch script (start-ra.cmd)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

OpenRA.Mods.Common/Traits/World/ValidateOrder.cs

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+#region Copyright & License Information
+/*
+ * Copyright (c) The OpenRA Developers and Contributors
+ * 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, either version 3 of
+ * the License, or (at your option) any later version. For more
+ * information, see COPYING.
+ */
+#endregion
+
+using OpenRA.Network;
+using OpenRA.Traits;
+
+namespace OpenRA.Mods.Common.Traits
+{
+	[TraitLocation(SystemActors.World)]
+	[Desc("Used to detect exploits. Attach this to the world actor.")]
+	public class ValidateOrderInfo : TraitInfo<ValidateOrder> { }
+
+	public class ValidateOrder : IValidateOrder
+	{
+		public bool OrderValidation(OrderManager orderManager, World world, int clientId, Order order)
+		{
+			if (order.Subject == null || order.Subject.Owner == null)
+				return true;
+
+			var subjectClientId = order.Subject.Owner.ClientIndex;
+			var subjectClient = orderManager.LobbyInfo.ClientWithIndex(subjectClientId);
+
+			if (subjectClient == null)
+			{
+				Log.Write("debug", $"Tick {world.WorldTick}: " +
+					$"Order sent to {order.Subject.Owner.ResolvedPlayerName}: " +
+					$"resolved ClientIndex `{subjectClientId}` doesn't exist");
+				return false;
+			}
+
+			var isBotOrder = subjectClient.Bot != null && clientId == subjectClient.BotControllerClientIndex;
+
+			// Drop orders from players who shouldn't be able to control this actor
+			// This may be because the owner changed within the last net tick,
+			// or, less likely, the client may be trying to do something malicious.
+			if (subjectClientId != clientId && !isBotOrder)
+				return false;
+
+			return order.Subject.AcceptsOrder(order.OrderString);
+		}
+	}
+}