Prevent infinite loops in device linking (#16856)

Content.Shared/DeviceLinking/DeviceLinkSinkComponent.cs

@@ -19,4 +19,20 @@ public sealed class DeviceLinkSinkComponent : Component
     /// </summary>
     [DataField("links")]
     public HashSet<EntityUid> LinkedSources = new();
+
+    /// <summary>
+    /// Counts the amount of times a sink has been invoked for severing the link if this counter gets to high
+    /// The counter is counted down by one every tick if it's higher than 0
+    /// This is for preventing infinite loops
+    /// </summary>
+    [DataField("invokeCounter")]
+    public int InvokeCounter;
+
+    /// <summary>
+    /// How high the invoke counter is allowed to get before the links to the sink are removed and the DeviceLinkOverloadedEvent gets raised
+    /// If the invoke limit is smaller than 1 the sink can't overload
+    /// </summary>
+    [ViewVariables(VVAccess.ReadWrite)]
+    [DataField("invokeLimit")]
+    public int InvokeLimit = 10;
 }