7 files changed, 264 insertions, 152 deletions

diff --git a/OpenSim/Region/ClientStack/Linden/UDP/IncomingPacket.cs b/OpenSim/Region/ClientStack/Linden/UDP/IncomingPacket.cs
index 90b3ede..1b8535c 100644
--- a/OpenSim/Region/ClientStack/Linden/UDP/IncomingPacket.cs
+++ b/OpenSim/Region/ClientStack/Linden/UDP/IncomingPacket.cs
@@ -39,7 +39,8 @@ namespace OpenSim.Region.ClientStack.LindenUDP
     public sealed class IncomingPacket
     {
         /// <summary>Client this packet came from</summary>
-        public LLUDPClient Client;
+        public LLClientView Client;
+
         /// <summary>Packet data that has been received</summary>
         public Packet Packet;
 
@@ -48,7 +49,7 @@ namespace OpenSim.Region.ClientStack.LindenUDP
         /// </summary>
         /// <param name="client">Reference to the client this packet came from</param>
         /// <param name="packet">Packet data</param>
-        public IncomingPacket(LLUDPClient client, Packet packet)
+        public IncomingPacket(LLClientView client, Packet packet)
         {
             Client = client;
             Packet = packet;
diff --git a/OpenSim/Region/ClientStack/Linden/UDP/LLClientView.cs b/OpenSim/Region/ClientStack/Linden/UDP/LLClientView.cs
index 9c96b52..3461971 100644
--- a/OpenSim/Region/ClientStack/Linden/UDP/LLClientView.cs
+++ b/OpenSim/Region/ClientStack/Linden/UDP/LLClientView.cs
@@ -515,6 +515,8 @@ namespace OpenSim.Region.ClientStack.LindenUDP
         /// </summary>
         public void Close(bool sendStop)
         {
+            IsActive = false;
+
             m_log.DebugFormat(
                 "[CLIENT]: Close has been called for {0} attached to scene {1}",
                 Name, m_scene.RegionInfo.RegionName);
@@ -3902,7 +3904,7 @@ namespace OpenSim.Region.ClientStack.LindenUDP
                         canUseImproved = false;
                     }
                 }
-
+    
                 #endregion UpdateFlags to packet type conversion
 
                 #region Block Construction
@@ -11866,7 +11868,8 @@ namespace OpenSim.Region.ClientStack.LindenUDP
                 if (DebugPacketLevel <= 100 && (packet.Type == PacketType.AvatarAnimation || packet.Type == PacketType.ViewerEffect))
                     logPacket = false;
                 
-                if (DebugPacketLevel <= 50 && packet.Type == PacketType.ImprovedTerseObjectUpdate)
+                if (DebugPacketLevel <= 50
+                    & (packet.Type == PacketType.ImprovedTerseObjectUpdate || packet.Type == PacketType.ObjectUpdate))
                     logPacket = false;
 
                 if (DebugPacketLevel <= 25 && packet.Type == PacketType.ObjectPropertiesFamily)
@@ -12076,10 +12079,6 @@ namespace OpenSim.Region.ClientStack.LindenUDP
             return string.Empty;
         }
 
-        public void KillEndDone()
-        {
-        }
-
         #region IClientCore
 
         private readonly Dictionary<Type, object> m_clientInterfaces = new Dictionary<Type, object>();
@@ -12167,21 +12166,24 @@ namespace OpenSim.Region.ClientStack.LindenUDP
         protected void MakeAssetRequest(TransferRequestPacket transferRequest, UUID taskID)
         {
             UUID requestID = UUID.Zero;
-            if (transferRequest.TransferInfo.SourceType == (int)SourceType.Asset)
+            int sourceType = transferRequest.TransferInfo.SourceType;
+
+            if (sourceType == (int)SourceType.Asset)
             {
                 requestID = new UUID(transferRequest.TransferInfo.Params, 0);
             }
-            else if (transferRequest.TransferInfo.SourceType == (int)SourceType.SimInventoryItem)
+            else if (sourceType == (int)SourceType.SimInventoryItem)
             {
                 requestID = new UUID(transferRequest.TransferInfo.Params, 80);
             }
-            else if (transferRequest.TransferInfo.SourceType == (int)SourceType.SimEstate)
+            else if (sourceType == (int)SourceType.SimEstate)
             {
                 requestID = taskID;
             }
 
-
-//            m_log.DebugFormat("[CLIENT]: {0} requesting asset {1}", Name, requestID);
+//            m_log.DebugFormat(
+//                "[LLCLIENTVIEW]: Received transfer request for {0} in {1} type {2} by {3}",
+//                requestID, taskID, (SourceType)sourceType, Name);
 
 
             //Note, the bool returned from the below function is useless since it is always false.
diff --git a/OpenSim/Region/ClientStack/Linden/UDP/LLUDPServer.cs b/OpenSim/Region/ClientStack/Linden/UDP/LLUDPServer.cs
index bd8273d..754d9d2 100644
--- a/OpenSim/Region/ClientStack/Linden/UDP/LLUDPServer.cs
+++ b/OpenSim/Region/ClientStack/Linden/UDP/LLUDPServer.cs
@@ -147,21 +147,34 @@ namespace OpenSim.Region.ClientStack.LindenUDP
         private int m_elapsed500MSOutgoingPacketHandler;
 
         /// <summary>Flag to signal when clients should check for resends</summary>
-        private bool m_resendUnacked;
+        protected bool m_resendUnacked;
+
         /// <summary>Flag to signal when clients should send ACKs</summary>
-        private bool m_sendAcks;
+        protected bool m_sendAcks;
+
         /// <summary>Flag to signal when clients should send pings</summary>
-        private bool m_sendPing;
+        protected bool m_sendPing;
 
         private int m_defaultRTO = 0;
         private int m_maxRTO = 0;
-
+        private int m_ackTimeout = 0;
+        private int m_pausedAckTimeout = 0;
         private bool m_disableFacelights = false;
 
         public Socket Server { get { return null; } }
 
         private int m_malformedCount = 0; // Guard against a spamming attack
 
+        /// <summary>
+        /// Record current outgoing client for monitoring purposes.
+        /// </summary>
+        private IClientAPI m_currentOutgoingClient;
+
+        /// <summary>
+        /// Recording current incoming client for monitoring purposes.
+        /// </summary>
+        private IClientAPI m_currentIncomingClient;
+
         public LLUDPServer(IPAddress listenIP, ref uint port, int proxyPortOffsetParm, bool allow_alternate_port, IConfigSource configSource, AgentCircuitManager circuitManager)
             : base(listenIP, (int)port)
         {
@@ -198,11 +211,15 @@ namespace OpenSim.Region.ClientStack.LindenUDP
                 m_defaultRTO = config.GetInt("DefaultRTO", 0);
                 m_maxRTO = config.GetInt("MaxRTO", 0);
                 m_disableFacelights = config.GetBoolean("DisableFacelights", false);
+                m_ackTimeout = 1000 * config.GetInt("AckTimeout", 60);
+                m_pausedAckTimeout = 1000 * config.GetInt("PausedAckTimeout", 300);
             }
             else
             {
                 PrimUpdatesPerCallback = 100;
                 TextureSendLimit = 20;
+                m_ackTimeout = 1000 * 60; // 1 minute
+                m_pausedAckTimeout = 1000 * 300; // 5 minutes
             }
 
             #region BinaryStats
@@ -239,19 +256,56 @@ namespace OpenSim.Region.ClientStack.LindenUDP
             if (m_scene == null)
                 throw new InvalidOperationException("[LLUDPSERVER]: Cannot LLUDPServer.Start() without an IScene reference");
 
-            m_log.Info("[LLUDPSERVER]: Starting the LLUDP server in " + (m_asyncPacketHandling ? "asynchronous" : "synchronous") + " mode");
+            m_log.InfoFormat(
+                "[LLUDPSERVER]: Starting the LLUDP server in {0} mode",
+                m_asyncPacketHandling ? "asynchronous" : "synchronous");
 
             base.Start(m_recvBufferSize, m_asyncPacketHandling);
 
             // Start the packet processing threads
             Watchdog.StartThread(
-                IncomingPacketHandler, "Incoming Packets (" + m_scene.RegionInfo.RegionName + ")", ThreadPriority.Normal, false, true);
+                IncomingPacketHandler,
+                string.Format("Incoming Packets ({0})", m_scene.RegionInfo.RegionName),
+                ThreadPriority.Normal,
+                false,
+                true,
+                GetWatchdogIncomingAlarmData,
+                Watchdog.DEFAULT_WATCHDOG_TIMEOUT_MS);
+
             Watchdog.StartThread(
-                OutgoingPacketHandler, "Outgoing Packets (" + m_scene.RegionInfo.RegionName + ")", ThreadPriority.Normal, false, true);
+                OutgoingPacketHandler,
+                string.Format("Outgoing Packets ({0})", m_scene.RegionInfo.RegionName),
+                ThreadPriority.Normal,
+                false,
+                true,
+                GetWatchdogOutgoingAlarmData,
+                Watchdog.DEFAULT_WATCHDOG_TIMEOUT_MS);
 
             m_elapsedMSSinceLastStatReport = Environment.TickCount;
         }
 
+        /// <summary>
+        /// If the outgoing UDP thread times out, then return client that was being processed to help with debugging.
+        /// </summary>
+        /// <returns></returns>
+        private string GetWatchdogIncomingAlarmData()
+        {
+            return string.Format(
+                "Client is {0}",
+                m_currentIncomingClient != null ? m_currentIncomingClient.Name : "none");
+        }
+
+        /// <summary>
+        /// If the outgoing UDP thread times out, then return client that was being processed to help with debugging.
+        /// </summary>
+        /// <returns></returns>
+        private string GetWatchdogOutgoingAlarmData()
+        {
+            return string.Format(
+                "Client is {0}",
+                m_currentOutgoingClient != null ? m_currentOutgoingClient.Name : "none");
+        }
+
         public new void Stop()
         {
             m_log.Info("[LLUDPSERVER]: Shutting down the LLUDP server for " + m_scene.RegionInfo.RegionName);
@@ -485,19 +539,34 @@ namespace OpenSim.Region.ClientStack.LindenUDP
             SendPacket(udpClient, completePing, ThrottleOutPacketType.Unknown, false, null);
         }
 
-        public void HandleUnacked(LLUDPClient udpClient)
+        public void HandleUnacked(LLClientView client)
         {
+            LLUDPClient udpClient = client.UDPClient;
+
             if (!udpClient.IsConnected)
                 return;
 
             // Disconnect an agent if no packets are received for some time
-            //FIXME: Make 60 an .ini setting
-            if ((Environment.TickCount & Int32.MaxValue) - udpClient.TickLastPacketReceived > 1000 * 60)
+            int timeoutTicks = m_ackTimeout;
+
+            // Allow more slack if the client is "paused" eg file upload dialogue is open
+            // Some sort of limit is needed in case the client crashes, loses its network connection
+            // or some other disaster prevents it from sendung the AgentResume
+            if (udpClient.IsPaused)
+                timeoutTicks = m_pausedAckTimeout;
+
+            if (client.IsActive &&
+                (Environment.TickCount & Int32.MaxValue) - udpClient.TickLastPacketReceived > timeoutTicks)
             {
-                m_log.Warn("[LLUDPSERVER]: Ack timeout, disconnecting " + udpClient.AgentID);
-                StatsManager.SimExtraStats.AddAbnormalClientThreadTermination();
+                // We must set IsActive synchronously so that we can stop the packet loop reinvoking this method, even
+                // though it's set later on by LLClientView.Close()
+                client.IsActive = false;
+
+                // Fire this out on a different thread so that we don't hold up outgoing packet processing for
+                // everybody else if this is being called due to an ack timeout.
+                // This is the same as processing as the async process of a logout request.
+                Util.FireAndForget(o => DeactivateClientDueToTimeout(client));
 
-                RemoveClient(udpClient);
                 return;
             }
 
@@ -823,7 +892,7 @@ namespace OpenSim.Region.ClientStack.LindenUDP
             #endregion Ping Check Handling
 
             // Inbox insertion
-            packetInbox.Enqueue(new IncomingPacket(udpClient, packet));
+            packetInbox.Enqueue(new IncomingPacket((LLClientView)client, packet));
         }
 
         #region BinaryStats
@@ -919,7 +988,9 @@ namespace OpenSim.Region.ClientStack.LindenUDP
                 UDPPacketBuffer buffer = (UDPPacketBuffer)array[0];
                 UseCircuitCodePacket uccp = (UseCircuitCodePacket)array[1];
 
-                m_log.DebugFormat("[LLUDPSERVER]: Handling UseCircuitCode request from {0}", buffer.RemoteEndPoint);
+                m_log.DebugFormat(
+                    "[LLUDPSERVER]: Handling UseCircuitCode request for circuit {0} to {1} from IP {2}",
+                    uccp.CircuitCode.Code, m_scene.RegionInfo.RegionName, buffer.RemoteEndPoint);
     
                 remoteEndPoint = (IPEndPoint)buffer.RemoteEndPoint;
     
@@ -948,8 +1019,8 @@ namespace OpenSim.Region.ClientStack.LindenUDP
                 {
                     // Don't create clients for unauthorized requesters.
                     m_log.WarnFormat(
-                        "[LLUDPSERVER]: Connection request for client {0} connecting with unnotified circuit code {1} from {2}",
-                        uccp.CircuitCode.ID, uccp.CircuitCode.Code, remoteEndPoint);
+                        "[LLUDPSERVER]: Ignoring connection request for {0} to {1} with unknown circuit code {2} from IP {3}",
+                        uccp.CircuitCode.ID, m_scene.RegionInfo.RegionName, uccp.CircuitCode.Code, remoteEndPoint);
                 }
     
                 //            m_log.DebugFormat(
@@ -1047,15 +1118,30 @@ namespace OpenSim.Region.ClientStack.LindenUDP
             return client;
         }
 
-        private void RemoveClient(LLUDPClient udpClient)
+        /// <summary>
+        /// Deactivates the client if we don't receive any packets within a certain amount of time (default 60 seconds).
+        /// </summary>
+        /// <remarks>
+        /// If a connection is active then we will always receive packets even if nothing else is happening, due to
+        /// regular client pings.
+        /// </remarks>
+        /// <param name='client'></param>
+        private void DeactivateClientDueToTimeout(IClientAPI client)
         {
-            // Remove this client from the scene
-            IClientAPI client;
-            if (m_scene.TryGetClient(udpClient.AgentID, out client))
-            {
-                client.IsLoggingOut = true;
-                client.Close(false);
-            }
+            // We must set IsActive synchronously so that we can stop the packet loop reinvoking this method, even
+            // though it's set later on by LLClientView.Close()
+            client.IsActive = false;
+
+            m_log.WarnFormat(
+                "[LLUDPSERVER]: Ack timeout, disconnecting {0} agent for {1} in {2}",
+                client.SceneAgent.IsChildAgent ? "child" : "root", client.Name, m_scene.RegionInfo.RegionName);
+
+            StatsManager.SimExtraStats.AddAbnormalClientThreadTermination();
+
+            if (!client.SceneAgent.IsChildAgent)
+                 client.Kick("Simulator logged you out due to connection timeout");
+
+            Util.FireAndForget(o => client.Close());
         }
 
         private void IncomingPacketHandler()
@@ -1164,6 +1250,8 @@ namespace OpenSim.Region.ClientStack.LindenUDP
                     // client. m_packetSent will be set to true if a packet is sent
                     m_scene.ForEachClient(clientPacketHandler);
 
+                    m_currentOutgoingClient = null;
+
                     // If nothing was sent, sleep for the minimum amount of time before a
                     // token bucket could get more tokens
                     if (!m_packetSent)
@@ -1180,18 +1268,21 @@ namespace OpenSim.Region.ClientStack.LindenUDP
             Watchdog.RemoveThread();
         }
 
-        private void ClientOutgoingPacketHandler(IClientAPI client)
+        protected void ClientOutgoingPacketHandler(IClientAPI client)
         {
+            m_currentOutgoingClient = client;
+
             try
             {
                 if (client is LLClientView)
                 {
-                    LLUDPClient udpClient = ((LLClientView)client).UDPClient;
+                    LLClientView llClient = (LLClientView)client;
+                    LLUDPClient udpClient = llClient.UDPClient;
 
                     if (udpClient.IsConnected)
                     {
                         if (m_resendUnacked)
-                            HandleUnacked(udpClient);
+                            HandleUnacked(llClient);
 
                         if (m_sendAcks)
                             SendAcks(udpClient);
@@ -1207,8 +1298,8 @@ namespace OpenSim.Region.ClientStack.LindenUDP
             }
             catch (Exception ex)
             {
-                m_log.Error("[LLUDPSERVER]: OutgoingPacketHandler iteration for " + client.Name +
-                    " threw an exception: " + ex.Message, ex);
+                m_log.Error(
+                    string.Format("[LLUDPSERVER]: OutgoingPacketHandler iteration for {0} threw ", client.Name), ex);
             }
         }
 
@@ -1234,11 +1325,14 @@ namespace OpenSim.Region.ClientStack.LindenUDP
         {
             nticks++;
             watch1.Start();
+            m_currentOutgoingClient = client;
+
             try
             {
                 if (client is LLClientView)
                 {
-                    LLUDPClient udpClient = ((LLClientView)client).UDPClient;
+                    LLClientView llClient = (LLClientView)client;
+                    LLUDPClient udpClient = llClient.UDPClient;
 
                     if (udpClient.IsConnected)
                     {
@@ -1247,7 +1341,7 @@ namespace OpenSim.Region.ClientStack.LindenUDP
                             nticksUnack++;
                             watch2.Start();
 
-                            HandleUnacked(udpClient);
+                            HandleUnacked(llClient);
 
                             watch2.Stop();
                             avgResendUnackedTicks = (nticksUnack - 1)/(float)nticksUnack * avgResendUnackedTicks + (watch2.ElapsedTicks / (float)nticksUnack);
@@ -1318,23 +1412,15 @@ namespace OpenSim.Region.ClientStack.LindenUDP
 
         #endregion 
 
-        private void ProcessInPacket(object state)
+        private void ProcessInPacket(IncomingPacket incomingPacket)
         {
-            IncomingPacket incomingPacket = (IncomingPacket)state;
             Packet packet = incomingPacket.Packet;
-            LLUDPClient udpClient = incomingPacket.Client;
-            IClientAPI client;
+            LLClientView client = incomingPacket.Client;
 
-            // Sanity check
-            if (packet == null || udpClient == null)
+            if (client.IsActive)
             {
-                m_log.WarnFormat("[LLUDPSERVER]: Processing a packet with incomplete state. Packet=\"{0}\", UDPClient=\"{1}\"",
-                    packet, udpClient);
-            }
+                m_currentIncomingClient = client;
 
-            // Make sure this client is still alive
-            if (m_scene.TryGetClient(udpClient.AgentID, out client))
-            {
                 try
                 {
                     // Process this packet
@@ -1349,21 +1435,34 @@ namespace OpenSim.Region.ClientStack.LindenUDP
                 catch (Exception e)
                 {
                     // Don't let a failure in an individual client thread crash the whole sim.
-                    m_log.ErrorFormat("[LLUDPSERVER]: Client packet handler for {0} for packet {1} threw an exception", udpClient.AgentID, packet.Type);
-                    m_log.Error(e.Message, e);
+                    m_log.Error(
+                        string.Format(
+                            "[LLUDPSERVER]: Client packet handler for {0} for packet {1} threw ",
+                            client.Name, packet.Type),
+                        e);
+                }
+                finally
+                {
+                    m_currentIncomingClient = null;
                 }
             }
             else
             {
-                m_log.DebugFormat("[LLUDPSERVER]: Dropping incoming {0} packet for dead client {1}", packet.Type, udpClient.AgentID);
+                m_log.DebugFormat(
+                    "[LLUDPSERVER]: Dropped incoming {0} for dead client {1} in {2}",
+                    packet.Type, client.Name, m_scene.RegionInfo.RegionName);
             }
         }
 
         protected void LogoutHandler(IClientAPI client)
         {
             client.SendLogoutPacket();
-            if (client.IsActive)
-                RemoveClient(((LLClientView)client).UDPClient);
+
+            if (!client.IsLoggingOut)
+            {
+                client.IsLoggingOut = true;
+                client.Close();
+            }
         }
     }
 }
diff --git a/OpenSim/Region/ClientStack/Linden/UDP/Tests/BasicCircuitTests.cs b/OpenSim/Region/ClientStack/Linden/UDP/Tests/BasicCircuitTests.cs
index a575e36..109a8e1 100644
--- a/OpenSim/Region/ClientStack/Linden/UDP/Tests/BasicCircuitTests.cs
+++ b/OpenSim/Region/ClientStack/Linden/UDP/Tests/BasicCircuitTests.cs
@@ -45,6 +45,9 @@ namespace OpenSim.Region.ClientStack.LindenUDP.Tests
     [TestFixture]
     public class BasicCircuitTests
     {
+        private Scene m_scene;
+        private TestLLUDPServer m_udpServer;
+
         [TestFixtureSetUp]
         public void FixtureInit()
         {
@@ -61,83 +64,18 @@ namespace OpenSim.Region.ClientStack.LindenUDP.Tests
             Util.FireAndForgetMethod = Util.DefaultFireAndForgetMethod;
         }
 
-//        /// <summary>
-//        /// Add a client for testing
-//        /// </summary>
-//        /// <param name="scene"></param>
-//        /// <param name="testLLUDPServer"></param>
-//        /// <param name="testPacketServer"></param>
-//        /// <param name="acm">Agent circuit manager used in setting up the stack</param>
-//        protected void SetupStack(
-//            IScene scene, out TestLLUDPServer testLLUDPServer, out TestLLPacketServer testPacketServer, 
-//            out AgentCircuitManager acm)
-//        {
-//            IConfigSource configSource = new IniConfigSource();
-//            ClientStackUserSettings userSettings = new ClientStackUserSettings();
-//            testLLUDPServer = new TestLLUDPServer();
-//            acm = new AgentCircuitManager();
-//                                    
-//            uint port = 666;
-//            testLLUDPServer.Initialise(null, ref port, 0, false, configSource, acm);
-//            testPacketServer = new TestLLPacketServer(testLLUDPServer, userSettings);
-//            testLLUDPServer.LocalScene = scene;
-//        }
-        
-//        /// <summary>
-//        /// Set up a client for tests which aren't concerned with this process itself and where only one client is being
-//        /// tested
-//        /// </summary>
-//        /// <param name="circuitCode"></param>
-//        /// <param name="epSender"></param>
-//        /// <param name="testLLUDPServer"></param>
-//        /// <param name="acm"></param>
-//        protected void AddClient(
-//            uint circuitCode, EndPoint epSender, TestLLUDPServer testLLUDPServer, AgentCircuitManager acm)
-//        {
-//            UUID myAgentUuid   = UUID.Parse("00000000-0000-0000-0000-000000000001");
-//            UUID mySessionUuid = UUID.Parse("00000000-0000-0000-0000-000000000002");
-//            
-//            AddClient(circuitCode, epSender, myAgentUuid, mySessionUuid, testLLUDPServer, acm);
-//        }
-        
-//        /// <summary>
-//        /// Set up a client for tests which aren't concerned with this process itself
-//        /// </summary>
-//        /// <param name="circuitCode"></param>
-//        /// <param name="epSender"></param>
-//        /// <param name="agentId"></param>
-//        /// <param name="sessionId"></param>
-//        /// <param name="testLLUDPServer"></param>
-//        /// <param name="acm"></param>
-//        protected void AddClient(
-//            uint circuitCode, EndPoint epSender, UUID agentId, UUID sessionId, 
-//            TestLLUDPServer testLLUDPServer, AgentCircuitManager acm)
-//        {
-//            AgentCircuitData acd = new AgentCircuitData();
-//            acd.AgentID = agentId;
-//            acd.SessionID = sessionId; 
-//            
-//            UseCircuitCodePacket uccp = new UseCircuitCodePacket();
-//            
-//            UseCircuitCodePacket.CircuitCodeBlock uccpCcBlock 
-//                = new UseCircuitCodePacket.CircuitCodeBlock();
-//            uccpCcBlock.Code = circuitCode;
-//            uccpCcBlock.ID = agentId;
-//            uccpCcBlock.SessionID = sessionId;
-//            uccp.CircuitCode = uccpCcBlock;
-//
-//            acm.AddNewCircuit(circuitCode, acd);
-//            
-//            testLLUDPServer.LoadReceive(uccp, epSender);
-//            testLLUDPServer.ReceiveData(null);
-//        }
+        [SetUp]
+        public void SetUp()
+        {
+            m_scene = new SceneHelpers().SetupScene();
+        }
         
         /// <summary>
         /// Build an object name packet for test purposes
         /// </summary>
         /// <param name="objectLocalId"></param>
         /// <param name="objectName"></param>
-        protected ObjectNamePacket BuildTestObjectNamePacket(uint objectLocalId, string objectName)
+        private ObjectNamePacket BuildTestObjectNamePacket(uint objectLocalId, string objectName)
         {
             ObjectNamePacket onp = new ObjectNamePacket();
             ObjectNamePacket.ObjectDataBlock odb = new ObjectNamePacket.ObjectDataBlock();
@@ -148,6 +86,55 @@ namespace OpenSim.Region.ClientStack.LindenUDP.Tests
             
             return onp;
         }
+
+        private void AddUdpServer()
+        {
+            AddUdpServer(new IniConfigSource());
+        }
+
+        private void AddUdpServer(IniConfigSource configSource)
+        {
+            uint port = 0;
+            AgentCircuitManager acm = m_scene.AuthenticateHandler;
+
+            m_udpServer = new TestLLUDPServer(IPAddress.Any, ref port, 0, false, configSource, acm);
+            m_udpServer.AddScene(m_scene);
+        }
+
+        /// <summary>
+        /// Used by tests that aren't testing this stage.
+        /// </summary>
+        private ScenePresence AddClient()
+        {
+            UUID myAgentUuid   = TestHelpers.ParseTail(0x1);
+            UUID mySessionUuid = TestHelpers.ParseTail(0x2);
+            uint myCircuitCode = 123456;
+            IPEndPoint testEp = new IPEndPoint(IPAddress.Loopback, 999);
+
+            UseCircuitCodePacket uccp = new UseCircuitCodePacket();
+
+            UseCircuitCodePacket.CircuitCodeBlock uccpCcBlock
+                = new UseCircuitCodePacket.CircuitCodeBlock();
+            uccpCcBlock.Code = myCircuitCode;
+            uccpCcBlock.ID = myAgentUuid;
+            uccpCcBlock.SessionID = mySessionUuid;
+            uccp.CircuitCode = uccpCcBlock;
+
+            byte[] uccpBytes = uccp.ToBytes();
+            UDPPacketBuffer upb = new UDPPacketBuffer(testEp, uccpBytes.Length);
+            upb.DataLength = uccpBytes.Length;  // God knows why this isn't set by the constructor.
+            Buffer.BlockCopy(uccpBytes, 0, upb.Data, 0, uccpBytes.Length);
+
+            AgentCircuitData acd = new AgentCircuitData();
+            acd.AgentID = myAgentUuid;
+            acd.SessionID = mySessionUuid;
+
+            m_scene.AuthenticateHandler.AddNewCircuit(myCircuitCode, acd);
+
+            m_udpServer.PacketReceived(upb);
+
+            return m_scene.GetScenePresence(myAgentUuid);
+        }
         
         /// <summary>
         /// Test adding a client to the stack
@@ -158,19 +145,13 @@ namespace OpenSim.Region.ClientStack.LindenUDP.Tests
             TestHelpers.InMethod();
 //            XmlConfigurator.Configure();
 
-            TestScene scene = SceneHelpers.SetupScene();
-            uint myCircuitCode = 123456;
+            AddUdpServer();
+
             UUID myAgentUuid   = TestHelpers.ParseTail(0x1);
             UUID mySessionUuid = TestHelpers.ParseTail(0x2);
+            uint myCircuitCode = 123456;
             IPEndPoint testEp = new IPEndPoint(IPAddress.Loopback, 999);
 
-            uint port = 0;
-            AgentCircuitManager acm = scene.AuthenticateHandler;
-
-            TestLLUDPServer llUdpServer
-                = new TestLLUDPServer(IPAddress.Any, ref port, 0, false, new IniConfigSource(), acm);
-            llUdpServer.AddScene(scene);
-
             UseCircuitCodePacket uccp = new UseCircuitCodePacket();
 
             UseCircuitCodePacket.CircuitCodeBlock uccpCcBlock
@@ -185,26 +166,26 @@ namespace OpenSim.Region.ClientStack.LindenUDP.Tests
             upb.DataLength = uccpBytes.Length;  // God knows why this isn't set by the constructor.
             Buffer.BlockCopy(uccpBytes, 0, upb.Data, 0, uccpBytes.Length);
 
-            llUdpServer.PacketReceived(upb);
+            m_udpServer.PacketReceived(upb);
 
             // Presence shouldn't exist since the circuit manager doesn't know about this circuit for authentication yet
-            Assert.That(scene.GetScenePresence(myAgentUuid), Is.Null);
+            Assert.That(m_scene.GetScenePresence(myAgentUuid), Is.Null);
 
             AgentCircuitData acd = new AgentCircuitData();
             acd.AgentID = myAgentUuid;
             acd.SessionID = mySessionUuid;
 
-            acm.AddNewCircuit(myCircuitCode, acd);
+            m_scene.AuthenticateHandler.AddNewCircuit(myCircuitCode, acd);
 
-            llUdpServer.PacketReceived(upb);
+            m_udpServer.PacketReceived(upb);
 
             // Should succeed now
-            ScenePresence sp = scene.GetScenePresence(myAgentUuid);
+            ScenePresence sp = m_scene.GetScenePresence(myAgentUuid);
             Assert.That(sp.UUID, Is.EqualTo(myAgentUuid));
 
-            Assert.That(llUdpServer.PacketsSent.Count, Is.EqualTo(1));
+            Assert.That(m_udpServer.PacketsSent.Count, Is.EqualTo(1));
 
-            Packet packet = llUdpServer.PacketsSent[0];
+            Packet packet = m_udpServer.PacketsSent[0];
             Assert.That(packet, Is.InstanceOf(typeof(PacketAckPacket)));
 
             PacketAckPacket ackPacket = packet as PacketAckPacket;
@@ -212,6 +193,26 @@ namespace OpenSim.Region.ClientStack.LindenUDP.Tests
             Assert.That(ackPacket.Packets[0].ID, Is.EqualTo(0));
         }
 
+        [Test]
+        public void TestLogoutClientDueToAck()
+        {
+            TestHelpers.InMethod();
+//            TestHelpers.EnableLogging();
+
+            IniConfigSource ics = new IniConfigSource();
+            IConfig config = ics.AddConfig("ClientStack.LindenUDP");
+            config.Set("AckTimeout", -1);
+            AddUdpServer(ics);
+
+            ScenePresence sp = AddClient();
+            m_udpServer.ClientOutgoingPacketHandler(sp.ControllingClient, true, false, false);
+
+            ScenePresence spAfterAckTimeout = m_scene.GetScenePresence(sp.UUID);
+            Assert.That(spAfterAckTimeout, Is.Null);
+
+//            TestHelpers.DisableLogging();
+        }
+
 //        /// <summary>
 //        /// Test removing a client from the stack
 //        /// </summary>
diff --git a/OpenSim/Region/ClientStack/Linden/UDP/Tests/LLImageManagerTests.cs b/OpenSim/Region/ClientStack/Linden/UDP/Tests/LLImageManagerTests.cs
index 1b68d68..5fcf376 100644
--- a/OpenSim/Region/ClientStack/Linden/UDP/Tests/LLImageManagerTests.cs
+++ b/OpenSim/Region/ClientStack/Linden/UDP/Tests/LLImageManagerTests.cs
@@ -79,7 +79,8 @@ namespace OpenSim.Region.ClientStack.LindenUDP.Tests
 
             J2KDecoderModule j2kdm = new J2KDecoderModule();
 
-            scene = SceneHelpers.SetupScene();
+            SceneHelpers sceneHelpers = new SceneHelpers();
+            scene = sceneHelpers.SetupScene();
             SceneHelpers.SetupSceneModules(scene, j2kdm);
 
             tc = new TestClient(SceneHelpers.GenerateAgentData(userId), scene);
diff --git a/OpenSim/Region/ClientStack/Linden/UDP/Tests/MockScene.cs b/OpenSim/Region/ClientStack/Linden/UDP/Tests/MockScene.cs
index d76927b..119a677 100644
--- a/OpenSim/Region/ClientStack/Linden/UDP/Tests/MockScene.cs
+++ b/OpenSim/Region/ClientStack/Linden/UDP/Tests/MockScene.cs
@@ -44,9 +44,8 @@ namespace OpenSim.Region.ClientStack.LindenUDP.Tests
         }
         protected int m_objectNameCallsReceived;
         
-        public MockScene()
+        public MockScene() : base(new RegionInfo(1000, 1000, null, null))
         {
-            m_regInfo = new RegionInfo(1000, 1000, null, null);
             m_regStatus = RegionStatus.Up;
         }
         
diff --git a/OpenSim/Region/ClientStack/Linden/UDP/Tests/TestLLUDPServer.cs b/OpenSim/Region/ClientStack/Linden/UDP/Tests/TestLLUDPServer.cs
index 0302385..27b9e5b 100644
--- a/OpenSim/Region/ClientStack/Linden/UDP/Tests/TestLLUDPServer.cs
+++ b/OpenSim/Region/ClientStack/Linden/UDP/Tests/TestLLUDPServer.cs
@@ -59,6 +59,15 @@ namespace OpenSim.Region.ClientStack.LindenUDP.Tests
             PacketsSent.Add(packet);
         }
 
+        public void ClientOutgoingPacketHandler(IClientAPI client, bool resendUnacked, bool sendAcks, bool sendPing)
+        {
+            m_resendUnacked = resendUnacked;
+            m_sendAcks = sendAcks;
+            m_sendPing = sendPing;
+
+            ClientOutgoingPacketHandler(client);
+        }
+
 ////        /// <summary>
 ////        /// The chunks of data to pass to the LLUDPServer when it calls EndReceive
 ////        /// </summary>