From 62bcf0e69405ee1443f66eecd1f3fbd684f0c2a5 Mon Sep 17 00:00:00 2001
From: Melanie Thielker
Date: Sat, 2 May 2009 13:16:41 +0000
Subject: Numerous packet improvements. Don't allow packets to be resent before
 they have actually been sent for the first time. Switch from serializing a
 packet to get it's length to the LibOMV provided Length property. Fix resend
 timing. Fix the use of dangling references to Acked packets. Fix the packet
 handler to play nice with the packet pool. Fix the packet pool. Add data
 block recycling to the packet pool. Packet pool is now ENABLED by default.
 Add config option to disable packet and data block reuse. Add ObjectUpdate
 and ImprovedTerseObjectUpdate to the packets being recycled.

---
 .../ClientStack/LindenUDP/LLPacketHandler.cs       | 22 ++++++++++++++--------
 1 file changed, 14 insertions(+), 8 deletions(-)

(limited to 'OpenSim/Region/ClientStack/LindenUDP/LLPacketHandler.cs')

diff --git a/OpenSim/Region/ClientStack/LindenUDP/LLPacketHandler.cs b/OpenSim/Region/ClientStack/LindenUDP/LLPacketHandler.cs
index 2191ca7..6229237 100644
--- a/OpenSim/Region/ClientStack/LindenUDP/LLPacketHandler.cs
+++ b/OpenSim/Region/ClientStack/LindenUDP/LLPacketHandler.cs
@@ -253,7 +253,8 @@ namespace OpenSim.Region.ClientStack.LindenUDP
             item.TickCount = Environment.TickCount;
             item.Identifier = id;
             item.Resends = 0;
-            item.Length = packet.ToBytes().Length;
+            item.Length = packet.Length;
+            item.Sequence = packet.Header.Sequence;
 
             m_PacketQueue.Enqueue(item);
             m_PacketsSent++;
@@ -310,7 +311,7 @@ namespace OpenSim.Region.ClientStack.LindenUDP
 
                     // Packets this old get resent
                     //
-                    if ((now - data.TickCount) > m_ResendTimeout)
+                    if ((now - data.TickCount) > m_ResendTimeout && data.Sequence != 0)
                     {
                         if (resent < 20)
                         {
@@ -325,6 +326,7 @@ namespace OpenSim.Region.ClientStack.LindenUDP
                             {
                                 m_NeedAck.Remove(packet.Header.Sequence);
                                 TriggerOnPacketDrop(packet, data.Identifier);
+                                m_PacketQueue.Cancel(packet.Header.Sequence);
                                 PacketPool.Instance.ReturnPacket(packet);
                                 continue;
                             }
@@ -586,11 +588,8 @@ namespace OpenSim.Region.ClientStack.LindenUDP
                     return;
 
                 m_NeedAck.Remove(id);
-                // We can't return this packet, it will just have to be GC'd
-                // Reason for that is that the packet may still be in the
-                // send queue, and if it gets reused things get messy!
-                //
-                // PacketPool.Instance.ReturnPacket(data.Packet);
+                m_PacketQueue.Cancel(data.Sequence);
+                PacketPool.Instance.ReturnPacket(data.Packet);
                 m_UnackedBytes -= data.Length;
             }
         }
@@ -680,7 +679,8 @@ namespace OpenSim.Region.ClientStack.LindenUDP
                 item.TickCount = Environment.TickCount;
                 item.Identifier = 0;
                 item.Resends = 0;
-                item.Length = packet.ToBytes().Length;
+                item.Length = packet.Length;
+                item.Sequence = packet.Header.Sequence;
                 m_NeedAck.Add(key, item);
             }
 
@@ -719,6 +719,7 @@ namespace OpenSim.Region.ClientStack.LindenUDP
                 if (data.Identifier != null && data.Identifier == id)
                 {
                     m_NeedAck.Remove(data.Packet.Header.Sequence);
+                    m_PacketQueue.Cancel(data.Sequence);
                     PacketPool.Instance.ReturnPacket(data.Packet);
                     return;
                 }
@@ -745,6 +746,8 @@ namespace OpenSim.Region.ClientStack.LindenUDP
             if (packet.Header.Sequence == 0)
             {
                 packet.Header.Sequence = NextPacketSequenceNumber();
+                item.Sequence = packet.Header.Sequence;
+                item.TickCount = Environment.TickCount;
 
                 lock (m_NeedAck)
                 {
@@ -793,7 +796,10 @@ namespace OpenSim.Region.ClientStack.LindenUDP
             // Dont't return in that case
             //
             if (!packet.Header.Reliable)
+            {
+                m_PacketQueue.Cancel(item.Sequence);
                 PacketPool.Instance.ReturnPacket(packet);
+            }
         }
 
         private void Abort()
-- 
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