major update; gen 3.5

Lidgren.Network/NetReliableSequencedReceiver.cs

@@ -0,0 +1,63 @@
+using System;
+
+namespace Lidgren.Network
+{
+	internal sealed class NetReliableSequencedReceiver : NetReceiverChannelBase
+	{
+		private int m_windowStart;
+		private int m_windowSize;
+
+		public NetReliableSequencedReceiver(NetConnection connection, int windowSize)
+			: base(connection)
+		{
+			m_windowSize = windowSize;
+		}
+
+		private void AdvanceWindow()
+		{
+			m_windowStart = (m_windowStart + 1) % NetConstants.NumSequenceNumbers;
+		}
+
+		internal override void ReceiveMessage(NetIncomingMessage message)
+		{
+			int nr = message.m_sequenceNumber;
+
+			int relate = NetUtility.RelativeSequenceNumber(nr, m_windowStart);
+
+			// ack no matter what
+			m_connection.QueueAck(message.m_receivedMessageType, nr);
+
+			if (relate == 0)
+			{
+				// Log("Received message #" + message.SequenceNumber + " right on time");
+
+				//
+				// excellent, right on time
+				//
+
+				AdvanceWindow();
+				m_peer.ReleaseMessage(message);
+				return;
+			}
+
+			if (relate < 0)
+			{
+				m_peer.LogVerbose("Received message #" + message.m_sequenceNumber + " DROPPING LATE or DUPE");
+				return;
+			}
+
+			// relate > 0 = early message
+			if (relate > m_windowSize)
+			{
+				// too early message!
+				m_peer.LogDebug("Received " + message + " TOO EARLY! Expected " + m_windowStart);
+				return;
+			}
+
+			// ok
+			m_windowStart = (m_windowStart + relate) % NetConstants.NumSequenceNumbers;
+			m_peer.ReleaseMessage(message);
+			return;
+		}
+	}
+}