5 files changed, 232 insertions, 125 deletions

diff --git a/OpenSim/Region/ClientStack/LindenUDP/J2KImage.cs b/OpenSim/Region/ClientStack/LindenUDP/J2KImage.cs
index e9e2dca..9dd6663 100644
--- a/OpenSim/Region/ClientStack/LindenUDP/J2KImage.cs
+++ b/OpenSim/Region/ClientStack/LindenUDP/J2KImage.cs
@@ -202,6 +202,9 @@ namespace OpenSim.Region.ClientStack.LindenUDP
                             m_stopPacket = TexturePacketCount();
                         }
 
+                        //Give them at least two packets, to play nice with some broken viewers (SL also behaves this way)
+                        if (m_stopPacket == 1 && Layers[0].End > FIRST_PACKET_SIZE) m_stopPacket++;
+
                         m_currentPacket = StartPacket;
                     }
                 }
diff --git a/OpenSim/Region/ClientStack/LindenUDP/LLClientView.cs b/OpenSim/Region/ClientStack/LindenUDP/LLClientView.cs
index 74ad485..e5cf0dc 100644
--- a/OpenSim/Region/ClientStack/LindenUDP/LLClientView.cs
+++ b/OpenSim/Region/ClientStack/LindenUDP/LLClientView.cs
@@ -155,6 +155,7 @@ namespace OpenSim.Region.ClientStack.LindenUDP
         public event RequestTaskInventory OnRequestTaskInventory;
         public event UpdateInventoryItem OnUpdateInventoryItem;
         public event CopyInventoryItem OnCopyInventoryItem;
+        public event MoveItemsAndLeaveCopy OnMoveItemsAndLeaveCopy;
         public event MoveInventoryItem OnMoveInventoryItem;
         public event RemoveInventoryItem OnRemoveInventoryItem;
         public event RemoveInventoryFolder OnRemoveInventoryFolder;
@@ -335,11 +336,13 @@ namespace OpenSim.Region.ClientStack.LindenUDP
 //        protected HashSet<uint> m_attachmentsSent;
 
         private int m_moneyBalance;
+        private bool m_deliverPackets = true;
         private int m_animationSequenceNumber = 1;
         private bool m_SendLogoutPacketWhenClosing = true;
         private AgentUpdateArgs lastarg;
         private bool m_IsActive = true;
         private bool m_IsLoggingOut = false;
+        private bool m_IsPresenceReady = false;
 
         protected Dictionary<PacketType, PacketProcessor> m_packetHandlers = new Dictionary<PacketType, PacketProcessor>();
         protected Dictionary<string, GenericMessage> m_genericPacketHandlers = new Dictionary<string, GenericMessage>(); //PauPaw:Local Generic Message handlers
@@ -362,6 +365,7 @@ namespace OpenSim.Region.ClientStack.LindenUDP
 
         private Timer m_propertiesPacketTimer;
         private List<ObjectPropertiesPacket.ObjectDataBlock> m_propertiesBlocks = new List<ObjectPropertiesPacket.ObjectDataBlock>();
+        private List<Packet> m_pendingPackets;
 
         #endregion Class Members
 
@@ -377,6 +381,14 @@ namespace OpenSim.Region.ClientStack.LindenUDP
             get { return m_startpos; }
             set { m_startpos = value; }
         }
+        public bool DeliverPackets
+        {
+            get { return m_deliverPackets; }
+            set {
+                m_deliverPackets = value;
+                m_udpClient.m_deliverPackets = value;
+            }
+        }
         public UUID AgentId { get { return m_agentId; } }
         public UUID ActiveGroupId { get { return m_activeGroupID; } }
         public string ActiveGroupName { get { return m_activeGroupName; } }
@@ -406,6 +418,7 @@ namespace OpenSim.Region.ClientStack.LindenUDP
             get { return m_IsActive; }
             set { m_IsActive = value; }
         }
+
         public bool IsLoggingOut
         {
             get { return m_IsLoggingOut; }
@@ -475,18 +488,30 @@ namespace OpenSim.Region.ClientStack.LindenUDP
 
         #region Client Methods
 
+
         /// <summary>
         /// Shut down the client view
         /// </summary>
         public void Close()
         {
+            Close(true);
+        }
+
+        /// <summary>
+        /// Shut down the client view
+        /// </summary>
+        public void Close(bool sendStop)
+        {
             m_log.DebugFormat(
                 "[CLIENT]: Close has been called for {0} attached to scene {1}",
                 Name, m_scene.RegionInfo.RegionName);
 
-            // Send the STOP packet
-            DisableSimulatorPacket disable = (DisableSimulatorPacket)PacketPool.Instance.GetPacket(PacketType.DisableSimulator);
-            OutPacket(disable, ThrottleOutPacketType.Unknown);
+            if (sendStop)
+            {
+                // Send the STOP packet
+                DisableSimulatorPacket disable = (DisableSimulatorPacket)PacketPool.Instance.GetPacket(PacketType.DisableSimulator);
+                OutPacket(disable, ThrottleOutPacketType.Unknown);
+            }
 
             IsActive = false;
 
@@ -766,7 +791,7 @@ namespace OpenSim.Region.ClientStack.LindenUDP
             reply.ChatData.OwnerID = fromAgentID;
             reply.ChatData.SourceID = fromAgentID;
 
-            OutPacket(reply, ThrottleOutPacketType.Task);
+            OutPacket(reply, ThrottleOutPacketType.Unknown);
         }
 
         /// <summary>
@@ -1052,6 +1077,10 @@ namespace OpenSim.Region.ClientStack.LindenUDP
         public virtual void SendLayerData(float[] map)
         {
             Util.FireAndForget(DoSendLayerData, map);
+
+            // Send it sync, and async. It's not that much data
+            // and it improves user experience just so much!
+            DoSendLayerData(map);
         }
 
         /// <summary>
@@ -1064,16 +1093,13 @@ namespace OpenSim.Region.ClientStack.LindenUDP
 
             try
             {
-                //for (int y = 0; y < 16; y++)
-                //{
-                //    for (int x = 0; x < 16; x++)
-                //    {
-                //        SendLayerData(x, y, map);
-                //    }
-                //}
-
-                // Send LayerData in a spiral pattern. Fun!
-                SendLayerTopRight(map, 0, 0, 15, 15);
+                for (int y = 0; y < 16; y++)
+                {
+                    for (int x = 0; x < 16; x+=4)
+                    {
+                        SendLayerPacket(x, y, map);
+                    }
+                }
             }
             catch (Exception e)
             {
@@ -1081,51 +1107,35 @@ namespace OpenSim.Region.ClientStack.LindenUDP
             }
         }
 
-        private void SendLayerTopRight(float[] map, int x1, int y1, int x2, int y2)
-        {
-            // Row
-            for (int i = x1; i <= x2; i++)
-                SendLayerData(i, y1, map);
-
-            // Column
-            for (int j = y1 + 1; j <= y2; j++)
-                SendLayerData(x2, j, map);
-
-            if (x2 - x1 > 0)
-                SendLayerBottomLeft(map, x1, y1 + 1, x2 - 1, y2);
-        }
-
-        void SendLayerBottomLeft(float[] map, int x1, int y1, int x2, int y2)
-        {
-            // Row in reverse
-            for (int i = x2; i >= x1; i--)
-                SendLayerData(i, y2, map);
-
-            // Column in reverse
-            for (int j = y2 - 1; j >= y1; j--)
-                SendLayerData(x1, j, map);
-
-            if (x2 - x1 > 0)
-                SendLayerTopRight(map, x1 + 1, y1, x2, y2 - 1);
-        }
-
         /// <summary>
         /// Sends a set of four patches (x, x+1, ..., x+3) to the client
         /// </summary>
         /// <param name="map">heightmap</param>
         /// <param name="px">X coordinate for patches 0..12</param>
         /// <param name="py">Y coordinate for patches 0..15</param>
-        // private void SendLayerPacket(float[] map, int y, int x)
-        // {
-        //     int[] patches = new int[4];
-        //     patches[0] = x + 0 + y * 16;
-        //     patches[1] = x + 1 + y * 16;
-        //     patches[2] = x + 2 + y * 16;
-        //     patches[3] = x + 3 + y * 16;
-
-        //     Packet layerpack = LLClientView.TerrainManager.CreateLandPacket(map, patches);
-        //     OutPacket(layerpack, ThrottleOutPacketType.Land);
-        // }
+        private void SendLayerPacket(int x, int y, float[] map)
+        {
+            int[] patches = new int[4];
+            patches[0] = x + 0 + y * 16;
+            patches[1] = x + 1 + y * 16;
+            patches[2] = x + 2 + y * 16;
+            patches[3] = x + 3 + y * 16;
+
+            float[] heightmap = (map.Length == 65536) ?
+                map :
+                LLHeightFieldMoronize(map);
+
+            try
+            {
+                Packet layerpack = TerrainCompressor.CreateLandPacket(heightmap, patches);
+                OutPacket(layerpack, ThrottleOutPacketType.Land);
+            }
+            catch
+            {
+                for (int px = x ; px < x + 4 ; px++)
+                    SendLayerData(px, y, map);
+            }
+        }
 
         /// <summary>
         /// Sends a specified patch to a client
@@ -1145,7 +1155,7 @@ namespace OpenSim.Region.ClientStack.LindenUDP
                 LayerDataPacket layerpack = TerrainCompressor.CreateLandPacket(heightmap, patches);
                 layerpack.Header.Reliable = true;
 
-                OutPacket(layerpack, ThrottleOutPacketType.Land);
+                OutPacket(layerpack, ThrottleOutPacketType.Task);
             }
             catch (Exception e)
             {
@@ -1506,35 +1516,46 @@ namespace OpenSim.Region.ClientStack.LindenUDP
             OutPacket(pc, ThrottleOutPacketType.Unknown);
         }
 
-        public void SendKillObject(ulong regionHandle, uint localID)
+        public void SendKillObject(ulong regionHandle, List<uint> localIDs)
         {
 //            m_log.DebugFormat("[CLIENT]: Sending KillObjectPacket to {0} for {1} in {2}", Name, localID, regionHandle);
 
             KillObjectPacket kill = (KillObjectPacket)PacketPool.Instance.GetPacket(PacketType.KillObject);
             // TODO: don't create new blocks if recycling an old packet
-            kill.ObjectData = new KillObjectPacket.ObjectDataBlock[1];
-            kill.ObjectData[0] = new KillObjectPacket.ObjectDataBlock();
-            kill.ObjectData[0].ID = localID;
+            kill.ObjectData = new KillObjectPacket.ObjectDataBlock[localIDs.Count];
+            for (int i = 0 ; i < localIDs.Count ; i++ )
+            {
+                kill.ObjectData[i] = new KillObjectPacket.ObjectDataBlock();
+                kill.ObjectData[i].ID = localIDs[i];
+            }
             kill.Header.Reliable = true;
             kill.Header.Zerocoded = true;
 
-            if (m_scene.GetScenePresence(localID) == null)
+            if (localIDs.Count == 1)
             {
-                lock (m_entityUpdates.SyncRoot)
+                if (m_scene.GetScenePresence(localIDs[0]) != null)
                 {
-                    m_killRecord.Add(localID);
-                    
-                    // The throttle queue used here must match that being used for updates.  Otherwise, there is a 
-                    // chance that a kill packet put on a separate queue will be sent to the client before an existing
-                    // update packet on another queue.  Receiving updates after kills results in unowned and undeletable
-                    // scene objects in a viewer until that viewer is relogged in.
-                    OutPacket(kill, ThrottleOutPacketType.Task);
+                    OutPacket(kill, ThrottleOutPacketType.State);
+                    return;
                 }
+                m_killRecord.Add(localIDs[0]);
             }
             else
             {
-                OutPacket(kill, ThrottleOutPacketType.State);
+                lock (m_entityUpdates.SyncRoot)
+                {
+                    foreach (uint localID in localIDs)
+                        m_killRecord.Add(localID);
+                }
             }
+
+            // The throttle queue used here must match that being used for
+            // updates. Otherwise, there is a chance that a kill packet put
+            // on a separate queue will be sent to the client before an
+            // existing update packet on another queue. Receiving updates
+            // after kills results in unowned and undeletable
+            // scene objects in a viewer until that viewer is relogged in.
+            OutPacket(kill, ThrottleOutPacketType.Task);
         }
 
         /// <summary>
@@ -2240,6 +2261,15 @@ namespace OpenSim.Region.ClientStack.LindenUDP
             OutPacket(sound, ThrottleOutPacketType.Task);
         }
 
+        public void SendTransferAbort(TransferRequestPacket transferRequest)
+        {
+            TransferAbortPacket abort = (TransferAbortPacket)PacketPool.Instance.GetPacket(PacketType.TransferAbort);
+            abort.TransferInfo.TransferID = transferRequest.TransferInfo.TransferID;
+            abort.TransferInfo.ChannelType = transferRequest.TransferInfo.ChannelType;
+            m_log.Debug("[Assets] Aborting transfer; asset request failed");
+            OutPacket(abort, ThrottleOutPacketType.Task);
+        }
+
         public void SendTriggeredSound(UUID soundID, UUID ownerID, UUID objectID, UUID parentID, ulong handle, Vector3 position, float gain)
         {
             SoundTriggerPacket sound = (SoundTriggerPacket)PacketPool.Instance.GetPacket(PacketType.SoundTrigger);
@@ -3532,6 +3562,15 @@ namespace OpenSim.Region.ClientStack.LindenUDP
         /// </summary>
         public void SendPrimUpdate(ISceneEntity entity, PrimUpdateFlags updateFlags)
         {
+            if (entity is SceneObjectPart)
+            {
+                SceneObjectPart e = (SceneObjectPart)entity;
+                SceneObjectGroup g = e.ParentGroup;
+                if (g.RootPart.Shape.State > 30) // HUD
+                    if (g.OwnerID != AgentId)
+                        return; // Don't send updates for other people's HUDs
+            }
+
             double priority = m_prioritizer.GetUpdatePriority(this, entity);
 
             lock (m_entityUpdates.SyncRoot)
@@ -3552,23 +3591,13 @@ namespace OpenSim.Region.ClientStack.LindenUDP
                 EntityUpdate update;
                 while (updatesThisCall < maxUpdates && m_entityUpdates.TryDequeue(out update))
                 {
-                    // Please do not remove this unless you can demonstrate on the OpenSim mailing list that a client
-                    // will never receive an update after a prim kill.  Even then, keeping the kill record may be a good
-                    // safety measure.
-                    //
-                    // Receiving updates after kills results in undeleteable prims that persist until relog and
-                    // currently occurs because prims can be deleted before all queued updates are sent.
-                    if (m_killRecord.Contains(update.Entity.LocalId))
-                    {
-//                        m_log.WarnFormat(
-//                            "[CLIENT]: Preventing full update for prim with local id {0} after client for user {1} told it was deleted",
-//                            update.Entity.LocalId, Name);
-                        continue;
-                    }
-
+                    // If we have sent a kill packet for this object
+                    // drop any updates on the floor
                     if (update.Entity is SceneObjectPart)
                     {
                         SceneObjectPart part = (SceneObjectPart)update.Entity;
+                        if (m_killRecord.Contains(part.ParentGroup.RootPart.LocalId))
+                            continue;
 
                         if (part.ParentGroup.IsAttachment && m_disableFacelights)
                         {
@@ -4002,6 +4031,9 @@ namespace OpenSim.Region.ClientStack.LindenUDP
             {
                 m_propertiesPacketTimer.Stop();
 
+                if (m_propertiesBlocks.Count == 0)
+                    return;
+
                 proper.ObjectData = new ObjectPropertiesPacket.ObjectDataBlock[m_propertiesBlocks.Count];
 
                 int index = 0;
@@ -4908,6 +4940,7 @@ namespace OpenSim.Region.ClientStack.LindenUDP
             AddLocalPacketHandler(PacketType.TransferAbort, HandleTransferAbort, false);
             AddLocalPacketHandler(PacketType.MuteListRequest, HandleMuteListRequest, false);
             AddLocalPacketHandler(PacketType.UseCircuitCode, HandleUseCircuitCode);
+            AddLocalPacketHandler(PacketType.CreateNewOutfitAttachments, HandleCreateNewOutfitAttachments);
             AddLocalPacketHandler(PacketType.AgentHeightWidth, HandleAgentHeightWidth, false);
             AddLocalPacketHandler(PacketType.InventoryDescendents, HandleInventoryDescendents);
             AddLocalPacketHandler(PacketType.DirPlacesQuery, HandleDirPlacesQuery);
@@ -5007,6 +5040,7 @@ namespace OpenSim.Region.ClientStack.LindenUDP
                         (x.CameraLeftAxis != lastarg.CameraLeftAxis) ||
                         (x.CameraUpAxis != lastarg.CameraUpAxis) ||
                         (x.ControlFlags != lastarg.ControlFlags) ||
+                        (x.ControlFlags != 0) ||
                         (x.Far != lastarg.Far) ||
                         (x.Flags != lastarg.Flags) ||
                         (x.State != lastarg.State) ||
@@ -5380,7 +5414,7 @@ namespace OpenSim.Region.ClientStack.LindenUDP
                 args.Channel = ch;
                 args.From = String.Empty;
                 args.Message = Utils.BytesToString(msg);
-                args.Type = ChatTypeEnum.Shout;
+                args.Type = ChatTypeEnum.Region; //Behaviour in SL is that the response can be heard from any distance
                 args.Position = new Vector3();
                 args.Scene = Scene;
                 args.Sender = this;
@@ -9418,6 +9452,37 @@ namespace OpenSim.Region.ClientStack.LindenUDP
         {
             return true;
         }
+        
+        private bool HandleCreateNewOutfitAttachments(IClientAPI sender, Packet Pack)
+        {
+            CreateNewOutfitAttachmentsPacket packet = (CreateNewOutfitAttachmentsPacket)Pack;
+
+            #region Packet Session and User Check
+            if (m_checkPackets)
+            {
+                if (packet.AgentData.SessionID != SessionId ||
+                    packet.AgentData.AgentID != AgentId)
+                    return true;
+            }
+            #endregion
+            MoveItemsAndLeaveCopy handlerMoveItemsAndLeaveCopy = null;
+            List<InventoryItemBase> items = new List<InventoryItemBase>();
+            foreach (CreateNewOutfitAttachmentsPacket.ObjectDataBlock n in packet.ObjectData)
+            {
+                InventoryItemBase b = new InventoryItemBase();
+                b.ID = n.OldItemID;
+                b.Folder = n.OldFolderID;
+                items.Add(b);
+            }
+
+            handlerMoveItemsAndLeaveCopy = OnMoveItemsAndLeaveCopy;
+            if (handlerMoveItemsAndLeaveCopy != null)
+            {
+                handlerMoveItemsAndLeaveCopy(this, items, packet.HeaderData.NewFolderID);
+            }
+
+            return true;
+        }
 
         private bool HandleAgentHeightWidth(IClientAPI sender, Packet Pack)
         {
@@ -10915,7 +10980,7 @@ namespace OpenSim.Region.ClientStack.LindenUDP
                     {
                         // It's a ghost! tell the client to delete it from view.
                         simClient.SendKillObject(Scene.RegionInfo.RegionHandle,
-                                                 localId);
+                                                 new List<uint>() { localId });
                     }
                     else
                     {
@@ -11280,6 +11345,21 @@ namespace OpenSim.Region.ClientStack.LindenUDP
         }
 
         /// <summary>
+        /// This processes packets which have accumulated while the presence was still in the process of initialising.
+        /// </summary>
+        public void ProcessPendingPackets()
+        {
+            m_IsPresenceReady = true;
+            if (m_pendingPackets == null)
+                return; 
+            foreach (Packet p in m_pendingPackets)
+            {
+                ProcessInPacket(p);
+            }
+            m_pendingPackets.Clear();
+        }
+
+        /// <summary>
         /// Entryway from the client to the simulator.  All UDP packets from the client will end up here
         /// </summary>
         /// <param name="Pack">OpenMetaverse.packet</param>
@@ -11542,7 +11622,10 @@ namespace OpenSim.Region.ClientStack.LindenUDP
 
 //            m_log.DebugFormat("[CLIENT]: {0} requesting asset {1}", Name, requestID);
 
+
+            //Note, the bool returned from the below function is useless since it is always false.
             m_assetService.Get(requestID.ToString(), transferRequest, AssetReceived);
+
         }
 
         /// <summary>
diff --git a/OpenSim/Region/ClientStack/LindenUDP/LLUDPClient.cs b/OpenSim/Region/ClientStack/LindenUDP/LLUDPClient.cs
index ca5a7bd..a4738ff 100644
--- a/OpenSim/Region/ClientStack/LindenUDP/LLUDPClient.cs
+++ b/OpenSim/Region/ClientStack/LindenUDP/LLUDPClient.cs
@@ -149,6 +149,7 @@ namespace OpenSim.Region.ClientStack.LindenUDP
 
         private int m_defaultRTO = 3000;
         private int m_maxRTO = 60000;
+        public bool m_deliverPackets = true;
 
         /// <summary>
         /// Default constructor
@@ -389,6 +390,13 @@ namespace OpenSim.Region.ClientStack.LindenUDP
             if (category >= 0 && category < m_packetOutboxes.Length)
             {
                 OpenSim.Framework.LocklessQueue<OutgoingPacket> queue = m_packetOutboxes[category];
+
+                if (m_deliverPackets == false)
+                {
+                    queue.Enqueue(packet);
+                    return true;
+                }
+
                 TokenBucket bucket = m_throttleCategories[category];
 
                 if (bucket.RemoveTokens(packet.Buffer.DataLength))
@@ -425,6 +433,8 @@ namespace OpenSim.Region.ClientStack.LindenUDP
         /// <returns>True if any packets were sent, otherwise false</returns>
         public bool DequeueOutgoing()
         {
+            if (m_deliverPackets == false) return false;
+
             OutgoingPacket packet;
             OpenSim.Framework.LocklessQueue<OutgoingPacket> queue;
             TokenBucket bucket;
diff --git a/OpenSim/Region/ClientStack/LindenUDP/LLUDPServer.cs b/OpenSim/Region/ClientStack/LindenUDP/LLUDPServer.cs
index cb298fd..e2cda6d 100644
--- a/OpenSim/Region/ClientStack/LindenUDP/LLUDPServer.cs
+++ b/OpenSim/Region/ClientStack/LindenUDP/LLUDPServer.cs
@@ -912,7 +912,30 @@ namespace OpenSim.Region.ClientStack.LindenUDP
                 client.DisableFacelights = m_disableFacelights;
 
                 // Start the IClientAPI
-                client.Start();
+                // Spin it off so that it doesn't clog up the LLUDPServer
+                
+                //First, and very importantly:
+                //
+                //Set our DeliverPackets flag in the client to *false*
+                //this will prevent us from missing important messages
+                //before the modules are bound
+                client.DeliverPackets = false;
+                client.DisableFacelights = m_disableFacelights;
+                
+                Util.FireAndForget(
+                    delegate
+                    {
+                        try
+                        {
+                            client.Start();
+                        }
+                        finally
+                        {
+                            //Now, release the hounds. er, packets.
+                            client.DeliverPackets = true;
+                        }
+                    }
+                );
             }
             else
             {
@@ -928,7 +951,7 @@ namespace OpenSim.Region.ClientStack.LindenUDP
             if (m_scene.TryGetClient(udpClient.AgentID, out client))
             {
                 client.IsLoggingOut = true;
-                client.Close();
+                client.Close(false);
             }
         }
 
diff --git a/OpenSim/Region/ClientStack/LindenUDP/TokenBucket.cs b/OpenSim/Region/ClientStack/LindenUDP/TokenBucket.cs
index bdbd284..91e3d20 100644
--- a/OpenSim/Region/ClientStack/LindenUDP/TokenBucket.cs
+++ b/OpenSim/Region/ClientStack/LindenUDP/TokenBucket.cs
@@ -133,7 +133,7 @@ namespace OpenSim.Region.ClientStack.LindenUDP
             this.parent = parent;
             MaxBurst = maxBurst;
             DripRate = dripRate;
-            lastDrip = Environment.TickCount & Int32.MaxValue;
+            lastDrip = Environment.TickCount;
         }
 
         /// <summary>
@@ -144,40 +144,30 @@ namespace OpenSim.Region.ClientStack.LindenUDP
         /// the bucket, otherwise false</returns>
         public bool RemoveTokens(int amount)
         {
-            bool dummy;
-            return RemoveTokens(amount, out dummy);
-        }
-
-        /// <summary>
-        /// Remove a given number of tokens from the bucket
-        /// </summary>
-        /// <param name="amount">Number of tokens to remove from the bucket</param>
-        /// <param name="dripSucceeded">True if tokens were added to the bucket
-        /// during this call, otherwise false</param>
-        /// <returns>True if the requested number of tokens were removed from
-        /// the bucket, otherwise false</returns>
-        public bool RemoveTokens(int amount, out bool dripSucceeded)
-        {
             if (maxBurst == 0)
             {
-                dripSucceeded = true;
                 return true;
             }
 
-            dripSucceeded = Drip();
-
-            if (content - amount >= 0)
+            if (amount > maxBurst)
             {
-                if (parent != null && !parent.RemoveTokens(amount))
-                    return false;
+                throw new Exception("amount " + amount + " exceeds maxBurst " + maxBurst);
+            }
 
-                content -= amount;
-                return true;
+            Drip();
+
+            if (content < amount)
+            {
+                return false;
             }
-            else
+
+            if (parent != null && !parent.RemoveTokens(amount))
             {
                 return false;
             }
+
+            content -= amount;
+            return true;
         }
 
         /// <summary>
@@ -193,25 +183,23 @@ namespace OpenSim.Region.ClientStack.LindenUDP
                 content = maxBurst;
                 return true;
             }
-            else
-            {
-                int now = Environment.TickCount & Int32.MaxValue;
-                int deltaMS = now - lastDrip;
 
-                if (deltaMS <= 0)
-                {
-                    if (deltaMS < 0)
-                        lastDrip = now;
-                    return false;
-                }
+            int now = Environment.TickCount;
+            int deltaMS = now - lastDrip;
+            lastDrip = now;
 
-                int dripAmount = deltaMS * tokensPerMS;
-
-                content = Math.Min(content + dripAmount, maxBurst);
-                lastDrip = now;
+            if (deltaMS <= 0)
+            {
+                return false;
+            }
 
-                return true;
+            long dripAmount = (long)deltaMS * (long)tokensPerMS + (long)content;
+            if (dripAmount > maxBurst)
+            {
+                dripAmount = maxBurst;
             }
+            content = (int)dripAmount;
+            return true;
         }
     }
 }