Major refactoring of sending messages to multiple recipients

Lidgren.Network/NetSending.cs

@@ -0,0 +1,50 @@
+using System;
+using System.Collections.Generic;
+using System.Net;
+using System.Diagnostics;
+
+namespace Lidgren.Network
+{
+	[DebuggerDisplay("MessageType={MessageType} SequenceNumber={SequenceNumber} NumSends={NumSends}")]
+	internal sealed class NetSending
+	{
+		public NetOutgoingMessage Message;
+		public IPEndPoint Recipient;
+		public NetMessageType MessageType;
+		public ushort SequenceNumber;
+		public double NextResend;
+		public int NumSends; // how many times has this sending been sent
+
+		public int FragmentGroupId;
+		public int FragmentNumber;
+		public int FragmentTotalCount;
+
+		public NetSending(NetOutgoingMessage msg, NetMessageType tp, ushort sequenceNumber)
+		{
+			Message = msg;
+			MessageType = tp;
+			SequenceNumber = sequenceNumber;
+		}
+
+		internal void SetNextResend(NetConnection conn)
+		{
+			float baseDelay;
+			switch(NumSends)
+			{
+				case 0: baseDelay = 0.025f; break;
+				case 1: baseDelay = 0.05f; break;
+				case 2: baseDelay = 0.15f; break;
+				case 3: baseDelay = 0.3f; break;
+				default:
+					baseDelay = (float)(NumSends - 3); // 4: 1 second, 5: 2 seconds, 6: 3 seconds etc
+					break;
+			}
+
+			float rttMultiplier = 1.15f + (0.15f * NumSends);
+
+			float totalDelay = baseDelay + (conn.AverageRoundtripTime * rttMultiplier);
+
+			NextResend = NetTime.Now + totalDelay;
+		}
+	}
+}