some cleanup

Author: RevenantX

LiteNetLib/NetDebug.cs

@@ -3,6 +3,20 @@
 
 namespace LiteNetLib
 {
+    public class InvalidPacketException : ArgumentException
+    {
+        public InvalidPacketException(string message) : base(message)
+        {
+        }
+    }
+
+    public class TooBigPacketException : InvalidPacketException
+    {
+        public TooBigPacketException(string message) : base(message)
+        {
+        }
+    }
+
     public enum NetLogLevel
     {
         Warning,

LiteNetLib/NetExceptions.cs

@@ -169,7 +169,7 @@ private struct IncomingData
         private volatile int _connectedPeersCount;
         private readonly List<NetPeer> _connectedPeerListCache;
         private NetPeer[] _peersArray;
-        internal readonly PacketLayerBase _extraPacketLayer;
+        private readonly PacketLayerBase _extraPacketLayer;
         private int _lastPeerId;
         private readonly Queue<int> _peerIds;
         private byte _channelsCount = 1;
@@ -342,6 +342,11 @@ public NetPeer GetPeerById(int id)
         /// </summary>
         public int ConnectedPeersCount { get { return _connectedPeersCount; } }
 
+        public int ExtraPacketSizeForLayer
+        {
+            get { return _extraPacketLayer != null ? _extraPacketLayer.ExtraPacketSizeForLayer : 0; }
+        }
+
         private bool TryGetPeer(IPEndPoint endPoint, out NetPeer peer)
         {
             _peersLock.EnterReadLock();

LiteNetLib/NetManager.cs

@@ -222,8 +222,7 @@ internal NetPeer(NetManager netManager, IPEndPoint remoteEndPoint, int id)
 
         private void SetMtu(int mtuIdx)
         {
-            int extraLayerSpace = NetManager._extraPacketLayer != null ? NetManager._extraPacketLayer.ExtraPacketSizeForLayer : 0;
-            _mtu = NetConstants.PossibleMtu[mtuIdx] - extraLayerSpace;
+            _mtu = NetConstants.PossibleMtu[mtuIdx] - NetManager.ExtraPacketSizeForLayer;
         }
 
         /// <summary>