If an agent is still registered as 'in transit' by the source region, don't allow an immediate teleport back.

This is to help relieve a race condition when an agent teleports then immediately attempts to teleport back before the source region has properly cleaned up/demoted the old ScenePresence.
This is rare in viewers but much more possible via scripting or region module.
However, more needs to be done since virtually all clean up happens after the transit flag is cleared .
Possibly need to add a 'cleaning up' state to in transit.
This change required making the EntityTransferModule and HGEntityTransferModule per-region rather than shared, in order to allow separate transit lists.
Changes were also required in LocalSimulationConnector.
Tested in standalone, grid and with local and remote region crossings with attachments.

6 files changed, 233 insertions, 193 deletions

diff --git a/OpenSim/Region/CoreModules/Framework/EntityTransfer/EntityTransferModule.cs b/OpenSim/Region/CoreModules/Framework/EntityTransfer/EntityTransferModule.cs
index 36e9da6..408d63d 100644
--- a/OpenSim/Region/CoreModules/Framework/EntityTransfer/EntityTransferModule.cs
+++ b/OpenSim/Region/CoreModules/Framework/EntityTransfer/EntityTransferModule.cs
@@ -46,7 +46,7 @@ using Nini.Config;
 
 namespace OpenSim.Region.CoreModules.Framework.EntityTransfer
 {
-    public class EntityTransferModule : ISharedRegionModule, IEntityTransferModule
+    public class EntityTransferModule : INonSharedRegionModule, IEntityTransferModule
     {
         private static readonly ILog m_log = LogManager.GetLogger(MethodBase.GetCurrentMethod().DeclaringType);
 
@@ -65,9 +65,11 @@ namespace OpenSim.Region.CoreModules.Framework.EntityTransfer
         public bool EnableWaitForCallbackFromTeleportDest { get; set; }
 
         protected bool m_Enabled = false;
-        protected Scene m_aScene;
-        protected List<Scene> m_Scenes = new List<Scene>();
+
+        protected Scene m_scene;
+
         protected List<UUID> m_agentsInTransit;
+
         private ExpiringCache<UUID, ExpiringCache<ulong, DateTime>> m_bannedRegions =
                 new ExpiringCache<UUID, ExpiringCache<ulong, DateTime>>();
 
@@ -129,10 +131,8 @@ namespace OpenSim.Region.CoreModules.Framework.EntityTransfer
             if (!m_Enabled)
                 return;
 
-            if (m_aScene == null)
-                m_aScene = scene;
+            m_scene = scene;
 
-            m_Scenes.Add(scene);
             scene.RegisterModuleInterface<IEntityTransferModule>(this);
             scene.EventManager.OnNewClient += OnNewClient;
         }
@@ -143,27 +143,11 @@ namespace OpenSim.Region.CoreModules.Framework.EntityTransfer
             client.OnTeleportLandmarkRequest += RequestTeleportLandmark;
         }
 
-        public virtual void Close()
-        {
-            if (!m_Enabled)
-                return;
-        }
+        public virtual void Close() {}
 
-        public virtual void RemoveRegion(Scene scene)
-        {
-            if (!m_Enabled)
-                return;
-            if (scene == m_aScene)
-                m_aScene = null;
+        public virtual void RemoveRegion(Scene scene) {}
 
-            m_Scenes.Remove(scene);
-        }
-
-        public virtual void RegionLoaded(Scene scene)
-        {
-            if (!m_Enabled)
-                return;
-        }
+        public virtual void RegionLoaded(Scene scene) {}
 
         #endregion
 
@@ -294,7 +278,7 @@ namespace OpenSim.Region.CoreModules.Framework.EntityTransfer
         {
             uint x = 0, y = 0;
             Utils.LongToUInts(regionHandle, out x, out y);
-            GridRegion reg = m_aScene.GridService.GetRegionByPosition(sp.Scene.RegionInfo.ScopeID, (int)x, (int)y);
+            GridRegion reg = m_scene.GridService.GetRegionByPosition(sp.Scene.RegionInfo.ScopeID, (int)x, (int)y);
 
             if (reg != null)
             {
@@ -441,7 +425,7 @@ namespace OpenSim.Region.CoreModules.Framework.EntityTransfer
 
                 string reason;
                 string version;
-                if (!m_aScene.SimulationService.QueryAccess(
+                if (!m_scene.SimulationService.QueryAccess(
                     finalDestination, sp.ControllingClient.AgentId, Vector3.Zero, out version, out reason))
                 {
                     sp.ControllingClient.SendTeleportFailed(reason);
@@ -660,7 +644,7 @@ namespace OpenSim.Region.CoreModules.Framework.EntityTransfer
             EnableChildAgents(sp);
 
             // Finally, kill the agent we just created at the destination.
-            m_aScene.SimulationService.CloseAgent(finalDestination, sp.UUID);
+            m_scene.SimulationService.CloseAgent(finalDestination, sp.UUID);
 
             sp.Scene.EventManager.TriggerTeleportFail(sp.ControllingClient, logout);
         }
@@ -668,7 +652,7 @@ namespace OpenSim.Region.CoreModules.Framework.EntityTransfer
         protected virtual bool CreateAgent(ScenePresence sp, GridRegion reg, GridRegion finalDestination, AgentCircuitData agentCircuit, uint teleportFlags, out string reason, out bool logout)
         {
             logout = false;
-            bool success = m_aScene.SimulationService.CreateAgent(finalDestination, agentCircuit, teleportFlags, out reason);
+            bool success = m_scene.SimulationService.CreateAgent(finalDestination, agentCircuit, teleportFlags, out reason);
 
             if (success)
                 sp.Scene.EventManager.TriggerTeleportStart(sp.ControllingClient, reg, finalDestination, teleportFlags, logout);
@@ -678,7 +662,7 @@ namespace OpenSim.Region.CoreModules.Framework.EntityTransfer
 
         protected virtual bool UpdateAgent(GridRegion reg, GridRegion finalDestination, AgentData agent)
         {
-            return m_aScene.SimulationService.UpdateAgent(finalDestination, agent);
+            return m_scene.SimulationService.UpdateAgent(finalDestination, agent);
         }
 
         protected virtual void SetCallbackURL(AgentData agent, RegionInfo region)
@@ -730,7 +714,6 @@ namespace OpenSim.Region.CoreModules.Framework.EntityTransfer
             return false;
         }
 
-
         #endregion
 
         #region Landmark Teleport
@@ -742,7 +725,7 @@ namespace OpenSim.Region.CoreModules.Framework.EntityTransfer
         /// <param name="position"></param>
         public virtual void RequestTeleportLandmark(IClientAPI remoteClient, AssetLandmark lm)
         {
-            GridRegion info = m_aScene.GridService.GetRegionByUUID(UUID.Zero, lm.RegionID);
+            GridRegion info = m_scene.GridService.GetRegionByUUID(UUID.Zero, lm.RegionID);
 
             if (info == null)
             {
@@ -763,12 +746,12 @@ namespace OpenSim.Region.CoreModules.Framework.EntityTransfer
             m_log.DebugFormat(
                 "[ENTITY TRANSFER MODULE]: Request to teleport {0} {1} home", client.Name, client.AgentId);
 
-            //OpenSim.Services.Interfaces.PresenceInfo pinfo = m_aScene.PresenceService.GetAgent(client.SessionId);
-            GridUserInfo uinfo = m_aScene.GridUserService.GetGridUserInfo(client.AgentId.ToString());
+            //OpenSim.Services.Interfaces.PresenceInfo pinfo = m_scene.PresenceService.GetAgent(client.SessionId);
+            GridUserInfo uinfo = m_scene.GridUserService.GetGridUserInfo(client.AgentId.ToString());
 
             if (uinfo != null)
             {
-                GridRegion regionInfo = m_aScene.GridService.GetRegionByUUID(UUID.Zero, uinfo.HomeRegionID);
+                GridRegion regionInfo = m_scene.GridService.GetRegionByUUID(UUID.Zero, uinfo.HomeRegionID);
                 if (regionInfo == null)
                 {
                     // can't find the Home region: Tell viewer and abort
@@ -1625,7 +1608,6 @@ namespace OpenSim.Region.CoreModules.Framework.EntityTransfer
         #region Agent Arrived
         public void AgentArrivedAtDestination(UUID id)
         {
-            m_log.DebugFormat("[ENTITY TRANSFER MODULE]: Agent {0} released", id);
             ResetFromTransit(id);
         }
 
@@ -1896,8 +1878,8 @@ namespace OpenSim.Region.CoreModules.Framework.EntityTransfer
                 //// And the new channel...
                 //if (m_interregionCommsOut != null)
                 //    successYN = m_interregionCommsOut.SendCreateObject(newRegionHandle, grp, true);
-                if (m_aScene.SimulationService != null)
-                    successYN = m_aScene.SimulationService.CreateObject(destination, newPosition, grp, true);
+                if (m_scene.SimulationService != null)
+                    successYN = m_scene.SimulationService.CreateObject(destination, newPosition, grp, true);
 
                 if (successYN)
                 {
@@ -2004,7 +1986,7 @@ namespace OpenSim.Region.CoreModules.Framework.EntityTransfer
         /// </summary>
         /// <returns>true if the agent is in the process of being teleported, false otherwise.</returns>
         /// <param name='id'>The agent ID</para></param>
-        protected bool IsInTransit(UUID id)
+        public bool IsInTransit(UUID id)
         {
             lock (m_agentsInTransit)
                 return m_agentsInTransit.Contains(id);
@@ -2024,10 +2006,19 @@ namespace OpenSim.Region.CoreModules.Framework.EntityTransfer
                 if (m_agentsInTransit.Contains(id))
                 {
                     m_agentsInTransit.Remove(id);
+
+                    m_log.DebugFormat(
+                        "[ENTITY TRANSFER MODULE]: Agent {0} cleared from transit in {1}",
+                        id, m_scene.RegionInfo.RegionName);
+
                     return true;
                 }
             }
 
+            m_log.WarnFormat(
+                "[ENTITY TRANSFER MODULE]: Agent {0} requested to clear from transit in {1} but was already cleared.",
+                id, m_scene.RegionInfo.RegionName);
+
             return false;
         }
 
diff --git a/OpenSim/Region/CoreModules/Framework/EntityTransfer/HGEntityTransferModule.cs b/OpenSim/Region/CoreModules/Framework/EntityTransfer/HGEntityTransferModule.cs
index b578bcb..4124667 100644
--- a/OpenSim/Region/CoreModules/Framework/EntityTransfer/HGEntityTransferModule.cs
+++ b/OpenSim/Region/CoreModules/Framework/EntityTransfer/HGEntityTransferModule.cs
@@ -45,11 +45,11 @@ using Nini.Config;
 
 namespace OpenSim.Region.CoreModules.Framework.EntityTransfer
 {
-    public class HGEntityTransferModule : EntityTransferModule, ISharedRegionModule, IEntityTransferModule, IUserAgentVerificationModule
+    public class HGEntityTransferModule
+        : EntityTransferModule, INonSharedRegionModule, IEntityTransferModule, IUserAgentVerificationModule
     {
         private static readonly ILog m_log = LogManager.GetLogger(MethodBase.GetCurrentMethod().DeclaringType);
 
-        private bool m_Initialized = false;
         private int m_levelHGTeleport = 0;
 
         private GatekeeperServiceConnector m_GatekeeperConnector;
@@ -64,6 +64,7 @@ namespace OpenSim.Region.CoreModules.Framework.EntityTransfer
         public override void Initialise(IConfigSource source)
         {
             IConfig moduleConfig = source.Configs["Modules"];
+
             if (moduleConfig != null)
             {
                 string name = moduleConfig.GetString("EntityTransferModule", "");
@@ -82,10 +83,9 @@ namespace OpenSim.Region.CoreModules.Framework.EntityTransfer
         public override void AddRegion(Scene scene)
         {
             base.AddRegion(scene);
+
             if (m_Enabled)
-            {
                 scene.RegisterModuleInterface<IUserAgentVerificationModule>(this);
-            }
         }
 
         protected override void OnNewClient(IClientAPI client)
@@ -98,33 +98,28 @@ namespace OpenSim.Region.CoreModules.Framework.EntityTransfer
         public override void RegionLoaded(Scene scene)
         {
             base.RegionLoaded(scene);
-            if (m_Enabled)
-                if (!m_Initialized)
-                {
-                    m_GatekeeperConnector = new GatekeeperServiceConnector(scene.AssetService);
-                    m_Initialized = true;
-
-                }
 
+            if (m_Enabled)
+                m_GatekeeperConnector = new GatekeeperServiceConnector(scene.AssetService);
         }
+
         public override void RemoveRegion(Scene scene)
         {
             base.AddRegion(scene);
+
             if (m_Enabled)
-            {
                 scene.UnregisterModuleInterface<IUserAgentVerificationModule>(this);
-            }
         }
 
-
         #endregion
 
         #region HG overrides of IEntiryTransferModule
 
         protected override GridRegion GetFinalDestination(GridRegion region)
         {
-            int flags = m_aScene.GridService.GetRegionFlags(m_aScene.RegionInfo.ScopeID, region.RegionID);
+            int flags = m_scene.GridService.GetRegionFlags(m_scene.RegionInfo.ScopeID, region.RegionID);
             m_log.DebugFormat("[HG ENTITY TRANSFER MODULE]: region {0} flags: {1}", region.RegionID, flags);
+
             if ((flags & (int)OpenSim.Data.RegionFlags.Hyperlink) != 0)
             {
                 m_log.DebugFormat("[HG ENTITY TRANSFER MODULE]: Destination region {0} is hyperlink", region.RegionID);
@@ -135,6 +130,7 @@ namespace OpenSim.Region.CoreModules.Framework.EntityTransfer
                     m_log.WarnFormat("[HG ENTITY TRANSFER MODULE]: GetHyperlinkRegion to Gatekeeper {0} failed", region.ServerURI);
                 return real_destination;
             }
+
             return region;
         }
 
@@ -143,7 +139,7 @@ namespace OpenSim.Region.CoreModules.Framework.EntityTransfer
             if (base.NeedsClosing(drawdist, oldRegionX, newRegionX, oldRegionY, newRegionY, reg))
                 return true;
 
-            int flags = m_aScene.GridService.GetRegionFlags(m_aScene.RegionInfo.ScopeID, reg.RegionID);
+            int flags = m_scene.GridService.GetRegionFlags(m_scene.RegionInfo.ScopeID, reg.RegionID);
             if (flags == -1 /* no region in DB */ || (flags & (int)OpenSim.Data.RegionFlags.Hyperlink) != 0)
                 return true;
 
@@ -156,7 +152,7 @@ namespace OpenSim.Region.CoreModules.Framework.EntityTransfer
             if (logout)
             {
                 // Log them out of this grid
-                m_aScene.PresenceService.LogoutAgent(sp.ControllingClient.SessionId);
+                m_scene.PresenceService.LogoutAgent(sp.ControllingClient.SessionId);
             }
         }
 
@@ -165,7 +161,7 @@ namespace OpenSim.Region.CoreModules.Framework.EntityTransfer
             m_log.DebugFormat("[HG ENTITY TRANSFER MODULE]: CreateAgent {0} {1}", reg.ServerURI, finalDestination.ServerURI);
             reason = string.Empty;
             logout = false;
-            int flags = m_aScene.GridService.GetRegionFlags(m_aScene.RegionInfo.ScopeID, reg.RegionID);
+            int flags = m_scene.GridService.GetRegionFlags(m_scene.RegionInfo.ScopeID, reg.RegionID);
             if (flags == -1 /* no region in DB */ || (flags & (int)OpenSim.Data.RegionFlags.Hyperlink) != 0)
             {
                 // this user is going to another grid
@@ -205,7 +201,7 @@ namespace OpenSim.Region.CoreModules.Framework.EntityTransfer
                 "[ENTITY TRANSFER MODULE]: Request to teleport {0} {1} home", client.Name, client.AgentId);
 
             // Let's find out if this is a foreign user or a local user
-            IUserManagement uMan = m_aScene.RequestModuleInterface<IUserManagement>(); 
+            IUserManagement uMan = m_scene.RequestModuleInterface<IUserManagement>();
             if (uMan != null && uMan.IsLocalGridUser(id))
             {
                 // local grid user
@@ -262,19 +258,21 @@ namespace OpenSim.Region.CoreModules.Framework.EntityTransfer
         {
             m_log.DebugFormat("[HG ENTITY TRANSFER MODULE]: Teleporting agent via landmark to {0} region {1} position {2}", 
                 (lm.Gatekeeper == string.Empty) ? "local" : lm.Gatekeeper, lm.RegionID, lm.Position);
+
             if (lm.Gatekeeper == string.Empty)
             {
                 base.RequestTeleportLandmark(remoteClient, lm);
                 return;
             }
 
-            GridRegion info = m_aScene.GridService.GetRegionByUUID(UUID.Zero, lm.RegionID);
+            GridRegion info = m_scene.GridService.GetRegionByUUID(UUID.Zero, lm.RegionID);
 
             // Local region?
             if (info != null)
             {
                 ((Scene)(remoteClient.Scene)).RequestTeleportLocation(remoteClient, info.RegionHandle, lm.Position,
                     Vector3.Zero, (uint)(Constants.TeleportFlags.SetLastToTarget | Constants.TeleportFlags.ViaLandmark));
+
                 return;
             }
             else 
@@ -285,6 +283,7 @@ namespace OpenSim.Region.CoreModules.Framework.EntityTransfer
                 GridRegion gatekeeper = new GridRegion();
                 gatekeeper.ServerURI = lm.Gatekeeper;
                 GridRegion finalDestination = gConn.GetHyperlinkRegion(gatekeeper, new UUID(lm.RegionID));
+
                 if (finalDestination != null)
                 {
                     ScenePresence sp = scene.GetScenePresence(remoteClient.AgentId);
@@ -314,8 +313,12 @@ namespace OpenSim.Region.CoreModules.Framework.EntityTransfer
                 IUserAgentService security = new UserAgentServiceConnector(url);
                 return security.VerifyClient(aCircuit.SessionID, token);
             } 
-            else 
-                m_log.DebugFormat("[HG ENTITY TRANSFER MODULE]: Agent {0} {1} does not have a HomeURI OH NO!", aCircuit.firstname, aCircuit.lastname);
+            else
+            {
+                m_log.DebugFormat(
+                    "[HG ENTITY TRANSFER MODULE]: Agent {0} {1} does not have a HomeURI OH NO!",
+                    aCircuit.firstname, aCircuit.lastname);
+            }
 
             return false;
         }
@@ -332,8 +335,8 @@ namespace OpenSim.Region.CoreModules.Framework.EntityTransfer
                 }
 
                 // Let's find out if this is a foreign user or a local user
-                IUserManagement uMan = m_aScene.RequestModuleInterface<IUserManagement>();
-                UserAccount account = m_aScene.UserAccountService.GetUserAccount(m_aScene.RegionInfo.ScopeID, obj.AgentId);
+                IUserManagement uMan = m_scene.RequestModuleInterface<IUserManagement>();
+                UserAccount account = m_scene.UserAccountService.GetUserAccount(m_scene.RegionInfo.ScopeID, obj.AgentId);
                 if (uMan != null && uMan.IsLocalGridUser(obj.AgentId))
                 {
                     // local grid user
@@ -356,7 +359,6 @@ namespace OpenSim.Region.CoreModules.Framework.EntityTransfer
 
         #endregion
 
-
         private GridRegion MakeRegion(AgentCircuitData aCircuit)
         {
             GridRegion region = new GridRegion();
@@ -373,6 +375,5 @@ namespace OpenSim.Region.CoreModules.Framework.EntityTransfer
             region.InternalEndPoint = new System.Net.IPEndPoint(System.Net.IPAddress.Parse("0.0.0.0"), (int)0);
             return region;
         }
-
     }
-}
+}
\ No newline at end of file
diff --git a/OpenSim/Region/CoreModules/ServiceConnectorsOut/Simulation/LocalSimulationConnector.cs b/OpenSim/Region/CoreModules/ServiceConnectorsOut/Simulation/LocalSimulationConnector.cs
index 90f27c4..270daad 100644
--- a/OpenSim/Region/CoreModules/ServiceConnectorsOut/Simulation/LocalSimulationConnector.cs
+++ b/OpenSim/Region/CoreModules/ServiceConnectorsOut/Simulation/LocalSimulationConnector.cs
@@ -26,6 +26,7 @@
  */
 using System;
 using System.Collections.Generic;
+using System.Linq;
 using System.Reflection;
 using log4net;
 using Nini.Config;
@@ -41,22 +42,20 @@ namespace OpenSim.Region.CoreModules.ServiceConnectorsOut.Simulation
     public class LocalSimulationConnectorModule : ISharedRegionModule, ISimulationService
     {
         private static readonly ILog m_log = LogManager.GetLogger(MethodBase.GetCurrentMethod().DeclaringType);
-        // Version of this service
-        private const string m_Version = "SIMULATION/0.1";
 
-        private List<Scene> m_sceneList = new List<Scene>();
+        /// <summary>
+        /// Version of this service
+        /// </summary>
+        private const string m_Version = "SIMULATION/0.1";
 
-        private IEntityTransferModule m_AgentTransferModule;
-        protected IEntityTransferModule AgentTransferModule
-        {
-            get
-            {
-                if (m_AgentTransferModule == null)
-                    m_AgentTransferModule = m_sceneList[0].RequestModuleInterface<IEntityTransferModule>();
-                return m_AgentTransferModule;
-            }
-        }
+        /// <summary>
+        /// Map region ID to scene.
+        /// </summary>
+        private Dictionary<UUID, Scene> m_scenes = new Dictionary<UUID, Scene>();
 
+        /// <summary>
+        /// Is this module enabled?
+        /// </summary>
         private bool m_ModuleEnabled = false;
 
         #region IRegionModule
@@ -129,12 +128,14 @@ namespace OpenSim.Region.CoreModules.ServiceConnectorsOut.Simulation
         /// <param name="scene"></param>
         public void RemoveScene(Scene scene)
         {
-            lock (m_sceneList)
+            lock (m_scenes)
             {
-                if (m_sceneList.Contains(scene))
-                {
-                    m_sceneList.Remove(scene);
-                }
+                if (m_scenes.ContainsKey(scene.RegionInfo.RegionID))
+                    m_scenes.Remove(scene.RegionInfo.RegionID);
+                else
+                    m_log.WarnFormat(
+                        "[LOCAL SIMULATION CONNECTOR]: Tried to remove region {0} but it was not present",
+                        scene.RegionInfo.RegionName);
             }
         }
 
@@ -144,13 +145,14 @@ namespace OpenSim.Region.CoreModules.ServiceConnectorsOut.Simulation
         /// <param name="scene"></param>
         public void Init(Scene scene)
         {
-            if (!m_sceneList.Contains(scene))
+            lock (m_scenes)
             {
-                lock (m_sceneList)
-                {
-                    m_sceneList.Add(scene);
-                }
-
+                if (!m_scenes.ContainsKey(scene.RegionInfo.RegionID))
+                    m_scenes[scene.RegionInfo.RegionID] = scene;
+                else
+                    m_log.WarnFormat(
+                        "[LOCAL SIMULATION CONNECTOR]: Tried to add region {0} but it is already present",
+                        scene.RegionInfo.RegionName);
             }
         }
 
@@ -160,13 +162,14 @@ namespace OpenSim.Region.CoreModules.ServiceConnectorsOut.Simulation
 
         public IScene GetScene(ulong regionhandle)
         {
-            foreach (Scene s in m_sceneList)
+            foreach (Scene s in m_scenes.Values)
             {
                 if (s.RegionInfo.RegionHandle == regionhandle)
                     return s;
             }
+
             // ? weird. should not happen
-            return m_sceneList[0];
+            return m_scenes.Values.ToArray()[0];
         }
 
         public ISimulationService GetInnerService()
@@ -187,13 +190,10 @@ namespace OpenSim.Region.CoreModules.ServiceConnectorsOut.Simulation
                 return false;
             }
 
-            foreach (Scene s in m_sceneList)
+            if (m_scenes.ContainsKey(destination.RegionID))
             {
-                if (s.RegionInfo.RegionHandle == destination.RegionHandle)
-                {
 //                    m_log.DebugFormat("[LOCAL SIMULATION CONNECTOR]: Found region {0} to send SendCreateChildAgent", destination.RegionName);
-                    return s.NewUserConnection(aCircuit, teleportFlags, out reason);
-                }
+                return m_scenes[destination.RegionID].NewUserConnection(aCircuit, teleportFlags, out reason);
             }
 
             reason = "Did not find region " + destination.RegionName;
@@ -205,17 +205,13 @@ namespace OpenSim.Region.CoreModules.ServiceConnectorsOut.Simulation
             if (destination == null)
                 return false;
 
-            foreach (Scene s in m_sceneList)
+            if (m_scenes.ContainsKey(destination.RegionID))
             {
-                if (s.RegionInfo.RegionHandle == destination.RegionHandle)
-                {
 //                    m_log.DebugFormat(
 //                        "[LOCAL SIMULATION CONNECTOR]: Found region {0} {1} to send AgentUpdate",
 //                        s.RegionInfo.RegionName, destination.RegionHandle);
 
-                    s.IncomingChildAgentDataUpdate(cAgentData);
-                    return true;
-                }
+                return m_scenes[destination.RegionID].IncomingChildAgentDataUpdate(cAgentData);
             }
 
 //            m_log.DebugFormat("[LOCAL COMMS]: Did not find region {0} for ChildAgentUpdate", regionHandle);
@@ -231,11 +227,12 @@ namespace OpenSim.Region.CoreModules.ServiceConnectorsOut.Simulation
             // simulator so when we receive the update we need to hand it to each of the
             // scenes; scenes each check to see if the is a scene presence for the avatar
             // note that we really don't need the GridRegion for this call
-            foreach (Scene s in m_sceneList)
+            foreach (Scene s in m_scenes.Values)
             {
                 //m_log.Debug("[LOCAL COMMS]: Found region to send ChildAgentUpdate");
                 s.IncomingChildAgentDataUpdate(cAgentData);
             }
+
             //m_log.Debug("[LOCAL COMMS]: region not found for ChildAgentUpdate");
             return true;
         }
@@ -247,14 +244,15 @@ namespace OpenSim.Region.CoreModules.ServiceConnectorsOut.Simulation
             if (destination == null)
                 return false;
 
-            foreach (Scene s in m_sceneList)
+            if (m_scenes.ContainsKey(destination.RegionID))
             {
-                if (s.RegionInfo.RegionHandle == destination.RegionHandle)
-                {
-                    //m_log.Debug("[LOCAL COMMS]: Found region to send ChildAgentUpdate");
-                    return s.IncomingRetrieveRootAgent(id, out agent);
-                }
+//                    m_log.DebugFormat(
+//                        "[LOCAL SIMULATION CONNECTOR]: Found region {0} {1} to send AgentUpdate",
+//                        s.RegionInfo.RegionName, destination.RegionHandle);
+
+                return m_scenes[destination.RegionID].IncomingRetrieveRootAgent(id, out agent);
             }
+
             //m_log.Debug("[LOCAL COMMS]: region not found for ChildAgentUpdate");
             return false;
         }
@@ -266,27 +264,31 @@ namespace OpenSim.Region.CoreModules.ServiceConnectorsOut.Simulation
             if (destination == null)
                 return false;
 
-            foreach (Scene s in m_sceneList)
+            if (m_scenes.ContainsKey(destination.RegionID))
             {
-                if (s.RegionInfo.RegionID == destination.RegionID)
-                    return s.QueryAccess(id, position, out reason);
+//                    m_log.DebugFormat(
+//                        "[LOCAL SIMULATION CONNECTOR]: Found region {0} {1} to send AgentUpdate",
+//                        s.RegionInfo.RegionName, destination.RegionHandle);
+
+                return m_scenes[destination.RegionID].QueryAccess(id, position, out reason);
             }
+
             //m_log.Debug("[LOCAL COMMS]: region not found for QueryAccess");
             return false;
         }
 
-        public bool ReleaseAgent(UUID origin, UUID id, string uri)
+        public bool ReleaseAgent(UUID originId, UUID agentId, string uri)
         {
-            foreach (Scene s in m_sceneList)
+            if (m_scenes.ContainsKey(originId))
             {
-                if (s.RegionInfo.RegionID == origin)
-                {
-//                    m_log.Debug("[LOCAL COMMS]: Found region to SendReleaseAgent");
-                    AgentTransferModule.AgentArrivedAtDestination(id);
-                    return true;
-//                    return s.IncomingReleaseAgent(id);
-                }
+//                    m_log.DebugFormat(
+//                        "[LOCAL SIMULATION CONNECTOR]: Found region {0} {1} to send AgentUpdate",
+//                        s.RegionInfo.RegionName, destination.RegionHandle);
+
+                m_scenes[originId].EntityTransferModule.AgentArrivedAtDestination(agentId);
+                return true;
             }
+
             //m_log.Debug("[LOCAL COMMS]: region not found in SendReleaseAgent " + origin);
             return false;
         }
@@ -296,17 +298,16 @@ namespace OpenSim.Region.CoreModules.ServiceConnectorsOut.Simulation
             if (destination == null)
                 return false;
 
-            foreach (Scene s in m_sceneList)
+            if (m_scenes.ContainsKey(destination.RegionID))
             {
-                if (s.RegionInfo.RegionID == destination.RegionID)
-                {
-                    //m_log.Debug("[LOCAL COMMS]: Found region to SendCloseAgent");
-                    // Let's spawn a threadlet right here, because this may take
-                    // a while
-                    Util.FireAndForget(delegate { s.IncomingCloseAgent(id); });
-                    return true;
-                }
+//                    m_log.DebugFormat(
+//                        "[LOCAL SIMULATION CONNECTOR]: Found region {0} {1} to send AgentUpdate",
+//                        s.RegionInfo.RegionName, destination.RegionHandle);
+
+                Util.FireAndForget(delegate { m_scenes[destination.RegionID].IncomingCloseAgent(id); });
+                return true;
             }
+
             //m_log.Debug("[LOCAL COMMS]: region not found in SendCloseAgent");
             return false;
         }
@@ -320,25 +321,28 @@ namespace OpenSim.Region.CoreModules.ServiceConnectorsOut.Simulation
             if (destination == null)
                 return false;
 
-            foreach (Scene s in m_sceneList)
+            if (m_scenes.ContainsKey(destination.RegionID))
             {
-                if (s.RegionInfo.RegionHandle == destination.RegionHandle)
+//                    m_log.DebugFormat(
+//                        "[LOCAL SIMULATION CONNECTOR]: Found region {0} {1} to send AgentUpdate",
+//                        s.RegionInfo.RegionName, destination.RegionHandle);
+
+                Scene s = m_scenes[destination.RegionID];
+
+                if (isLocalCall)
                 {
-                    //m_log.Debug("[LOCAL COMMS]: Found region to SendCreateObject");
-                    if (isLocalCall)
-                    {
-                        // We need to make a local copy of the object
-                        ISceneObject sogClone = sog.CloneForNewScene();
-                        sogClone.SetState(sog.GetStateSnapshot(), s);
-                        return s.IncomingCreateObject(newPosition, sogClone);
-                    }
-                    else
-                    {
-                        // Use the object as it came through the wire
-                        return s.IncomingCreateObject(newPosition, sog);
-                    }
+                    // We need to make a local copy of the object
+                    ISceneObject sogClone = sog.CloneForNewScene();
+                    sogClone.SetState(sog.GetStateSnapshot(), s);
+                    return s.IncomingCreateObject(newPosition, sogClone);
+                }
+                else
+                {
+                    // Use the object as it came through the wire
+                    return s.IncomingCreateObject(newPosition, sog);
                 }
             }
+
             return false;
         }
 
@@ -347,13 +351,15 @@ namespace OpenSim.Region.CoreModules.ServiceConnectorsOut.Simulation
             if (destination == null)
                 return false;
 
-            foreach (Scene s in m_sceneList)
+            if (m_scenes.ContainsKey(destination.RegionID))
             {
-                if (s.RegionInfo.RegionHandle == destination.RegionHandle)
-                {
-                    return s.IncomingCreateObject(userID, itemID);
-                }
+//                    m_log.DebugFormat(
+//                        "[LOCAL SIMULATION CONNECTOR]: Found region {0} {1} to send AgentUpdate",
+//                        s.RegionInfo.RegionName, destination.RegionHandle);
+
+                return m_scenes[destination.RegionID].IncomingCreateObject(userID, itemID);
             }
+
             return false;
         }
 
@@ -364,20 +370,18 @@ namespace OpenSim.Region.CoreModules.ServiceConnectorsOut.Simulation
 
         public bool IsLocalRegion(ulong regionhandle)
         {
-            foreach (Scene s in m_sceneList)
+            foreach (Scene s in m_scenes.Values)
                 if (s.RegionInfo.RegionHandle == regionhandle)
                     return true;
+
             return false;
         }
 
         public bool IsLocalRegion(UUID id)
         {
-            foreach (Scene s in m_sceneList)
-                if (s.RegionInfo.RegionID == id)
-                    return true;
-            return false;
+            return m_scenes.ContainsKey(id);
         }
 
         #endregion
     }
-}
+}
\ No newline at end of file
diff --git a/OpenSim/Region/Framework/Interfaces/IEntityTransferModule.cs b/OpenSim/Region/Framework/Interfaces/IEntityTransferModule.cs
index 18e9e3c..75c44d5 100644
--- a/OpenSim/Region/Framework/Interfaces/IEntityTransferModule.cs
+++ b/OpenSim/Region/Framework/Interfaces/IEntityTransferModule.cs
@@ -74,6 +74,13 @@ namespace OpenSim.Region.Framework.Interfaces
         /// <param name='client'></param>
         void TeleportHome(UUID id, IClientAPI client);
 
+        /// <summary>
+        /// Show whether the given agent is being teleported.
+        /// </summary>
+        /// <returns>true if the agent is in the process of being teleported, false otherwise.</returns>
+        /// <param name='id'>The agent ID</para></param>
+        bool IsInTransit(UUID id);        
+
         bool Cross(ScenePresence agent, bool isFlying);
 
         void AgentArrivedAtDestination(UUID agent);
diff --git a/OpenSim/Region/Framework/Scenes/Scene.cs b/OpenSim/Region/Framework/Scenes/Scene.cs
index fbe56f6..755b1e6 100644
--- a/OpenSim/Region/Framework/Scenes/Scene.cs
+++ b/OpenSim/Region/Framework/Scenes/Scene.cs
@@ -166,7 +166,6 @@ namespace OpenSim.Region.Framework.Scenes
         protected IConfigSource m_config;
         protected IRegionSerialiserModule m_serialiser;
         protected IDialogModule m_dialogModule;
-        protected IEntityTransferModule m_teleportModule;
         protected ICapabilitiesModule m_capsModule;
         protected IGroupsModule m_groupsModule;
 
@@ -498,6 +497,7 @@ namespace OpenSim.Region.Framework.Scenes
         }
 
         public IAttachmentsModule AttachmentsModule { get; set; }
+        public IEntityTransferModule EntityTransferModule { get; private set; }
 
         public IAvatarFactoryModule AvatarFactory
         {
@@ -924,8 +924,8 @@ namespace OpenSim.Region.Framework.Scenes
                             List<ulong> old = new List<ulong>();
                             old.Add(otherRegion.RegionHandle);
                             agent.DropOldNeighbours(old);
-                            if (m_teleportModule != null && agent.PresenceType != PresenceType.Npc)
-                                m_teleportModule.EnableChildAgent(agent, otherRegion);
+                            if (EntityTransferModule != null && agent.PresenceType != PresenceType.Npc)
+                                EntityTransferModule.EnableChildAgent(agent, otherRegion);
                         });
                     }
                     catch (NullReferenceException)
@@ -1062,8 +1062,8 @@ namespace OpenSim.Region.Framework.Scenes
                     {
                         ForEachRootScenePresence(delegate(ScenePresence agent)
                         {
-                            if (m_teleportModule != null && agent.PresenceType != PresenceType.Npc)
-                                m_teleportModule.EnableChildAgent(agent, r);
+                            if (EntityTransferModule != null && agent.PresenceType != PresenceType.Npc)
+                                EntityTransferModule.EnableChildAgent(agent, r);
                         });
                     }
                     catch (NullReferenceException)
@@ -1238,7 +1238,7 @@ namespace OpenSim.Region.Framework.Scenes
             m_serialiser = RequestModuleInterface<IRegionSerialiserModule>();
             m_dialogModule = RequestModuleInterface<IDialogModule>();
             m_capsModule = RequestModuleInterface<ICapabilitiesModule>();
-            m_teleportModule = RequestModuleInterface<IEntityTransferModule>();
+            EntityTransferModule = RequestModuleInterface<IEntityTransferModule>();
             m_groupsModule = RequestModuleInterface<IGroupsModule>();
         }
 
@@ -2275,8 +2275,8 @@ namespace OpenSim.Region.Framework.Scenes
                 return;
             }
 
-            if (m_teleportModule != null)
-                m_teleportModule.Cross(grp, attemptedPosition, silent);
+            if (EntityTransferModule != null)
+                EntityTransferModule.Cross(grp, attemptedPosition, silent);
         }
 
         public Border GetCrossedBorder(Vector3 position, Cardinals gridline)
@@ -3078,8 +3078,10 @@ namespace OpenSim.Region.Framework.Scenes
         /// <param name="client">The IClientAPI for the client</param>
         public virtual void TeleportClientHome(UUID agentId, IClientAPI client)
         {
-            if (m_teleportModule != null)
-                m_teleportModule.TeleportHome(agentId, client);
+            if (EntityTransferModule != null)
+            {
+                EntityTransferModule.TeleportHome(agentId, client);
+            }
             else
             {
                 m_log.DebugFormat("[SCENE]: Unable to teleport user home: no AgentTransferModule is active");
@@ -3638,7 +3640,6 @@ namespace OpenSim.Region.Framework.Scenes
 
         private bool TestLandRestrictions(AgentCircuitData agent, ILandObject land,  out string reason)
         {
-      
             bool banned = land.IsBannedFromLand(agent.AgentID);
             bool restricted = land.IsRestrictedFromLand(agent.AgentID);
 
@@ -4131,8 +4132,10 @@ namespace OpenSim.Region.Framework.Scenes
                     position.Y -= shifty;
                 }
 
-                if (m_teleportModule != null)
-                    m_teleportModule.Teleport(sp, regionHandle, position, lookAt, teleportFlags);
+                if (EntityTransferModule != null)
+                {
+                    EntityTransferModule.Teleport(sp, regionHandle, position, lookAt, teleportFlags);
+                }
                 else
                 {
                     m_log.DebugFormat("[SCENE]: Unable to perform teleports: no AgentTransferModule is active");
@@ -4143,8 +4146,10 @@ namespace OpenSim.Region.Framework.Scenes
 
         public bool CrossAgentToNewRegion(ScenePresence agent, bool isFlying)
         {
-            if (m_teleportModule != null)
-                return m_teleportModule.Cross(agent, isFlying);
+            if (EntityTransferModule != null)
+            {
+                return EntityTransferModule.Cross(agent, isFlying);
+            }
             else
             {
                 m_log.DebugFormat("[SCENE]: Unable to cross agent to neighbouring region, because there is no AgentTransferModule");
@@ -5188,14 +5193,34 @@ namespace OpenSim.Region.Framework.Scenes
                 throw new Exception(error);
         }
 
-        // This method is called across the simulation connector to
-        // determine if a given agent is allowed in this region
-        // AS A ROOT AGENT. Returning false here will prevent them
-        // from logging into the region, teleporting into the region
-        // or corssing the broder walking, but will NOT prevent
-        // child agent creation, thereby emulating the SL behavior.
+        /// <summary>
+        /// This method is called across the simulation connector to
+        /// determine if a given agent is allowed in this region
+        /// AS A ROOT AGENT
+        /// </summary>
+        /// <remarks>
+        /// Returning false here will prevent them
+        /// from logging into the region, teleporting into the region
+        /// or corssing the broder walking, but will NOT prevent
+        /// child agent creation, thereby emulating the SL behavior.
+        /// </remarks>
+        /// <param name='agentID'></param>
+        /// <param name='position'></param>
+        /// <param name='reason'></param>
+        /// <returns></returns>
         public bool QueryAccess(UUID agentID, Vector3 position, out string reason)
         {
+            if (EntityTransferModule.IsInTransit(agentID))
+            {
+                reason = "Agent is already in transit on this region";
+
+                m_log.DebugFormat(
+                    "[SCENE]: Denying agent {0} entry into {1} since region already has them registered as in transit",
+                    agentID, RegionInfo.RegionName);
+
+                return false;
+            }
+
             // FIXME: Root agent count is currently known to be inaccurate.  This forces a recount before we check.
             // However, the long term fix is to make sure root agent count is always accurate.
             m_sceneGraph.RecalculateStats();
diff --git a/OpenSim/Region/Framework/Scenes/Tests/ScenePresenceTeleportTests.cs b/OpenSim/Region/Framework/Scenes/Tests/ScenePresenceTeleportTests.cs
index 41bff7f..ccfe4ff 100644
--- a/OpenSim/Region/Framework/Scenes/Tests/ScenePresenceTeleportTests.cs
+++ b/OpenSim/Region/Framework/Scenes/Tests/ScenePresenceTeleportTests.cs
@@ -110,12 +110,13 @@ namespace OpenSim.Region.Framework.Scenes.Tests
 
             UUID userId = TestHelpers.ParseTail(0x1);
 
-            EntityTransferModule etm = new EntityTransferModule();
+            EntityTransferModule etmA = new EntityTransferModule();
+            EntityTransferModule etmB = new EntityTransferModule();
             LocalSimulationConnectorModule lscm = new LocalSimulationConnectorModule();
 
             IConfigSource config = new IniConfigSource();
             IConfig modulesConfig = config.AddConfig("Modules");
-            modulesConfig.Set("EntityTransferModule", etm.Name);
+            modulesConfig.Set("EntityTransferModule", etmA.Name);
             modulesConfig.Set("SimulationServices", lscm.Name);
             IConfig entityTransferConfig = config.AddConfig("EntityTransfer");
 
@@ -127,7 +128,9 @@ namespace OpenSim.Region.Framework.Scenes.Tests
             TestScene sceneA = sh.SetupScene("sceneA", TestHelpers.ParseTail(0x100), 1000, 1000);
             TestScene sceneB = sh.SetupScene("sceneB", TestHelpers.ParseTail(0x200), 1002, 1000);
 
-            SceneHelpers.SetupSceneModules(new Scene[] { sceneA, sceneB }, config, etm, lscm);
+            SceneHelpers.SetupSceneModules(sceneA, config, etmA);
+            SceneHelpers.SetupSceneModules(sceneB, config, etmB);
+            SceneHelpers.SetupSceneModules(new Scene[] { sceneA, sceneB }, config, lscm);
 
             Vector3 teleportPosition = new Vector3(10, 11, 12);
             Vector3 teleportLookAt = new Vector3(20, 21, 22);
@@ -174,12 +177,14 @@ namespace OpenSim.Region.Framework.Scenes.Tests
             UUID userId = TestHelpers.ParseTail(0x1);
             Vector3 preTeleportPosition = new Vector3(30, 31, 32);
 
-            EntityTransferModule etm = new EntityTransferModule();
+            EntityTransferModule etmA = new EntityTransferModule();
+            EntityTransferModule etmB = new EntityTransferModule();
+
             LocalSimulationConnectorModule lscm = new LocalSimulationConnectorModule();
 
             IConfigSource config = new IniConfigSource();
             config.AddConfig("Modules");
-            config.Configs["Modules"].Set("EntityTransferModule", etm.Name);
+            config.Configs["Modules"].Set("EntityTransferModule", etmA.Name);
             config.Configs["Modules"].Set("SimulationServices", lscm.Name);
 
             config.AddConfig("EntityTransfer");
@@ -195,13 +200,15 @@ namespace OpenSim.Region.Framework.Scenes.Tests
             TestScene sceneA = sh.SetupScene("sceneA", TestHelpers.ParseTail(0x100), 1000, 1000);
             TestScene sceneB = sh.SetupScene("sceneB", TestHelpers.ParseTail(0x200), 1002, 1000);
 
+            SceneHelpers.SetupSceneModules(sceneA, config, etmA );
+
             // We need to set up the permisions module on scene B so that our later use of agent limit to deny
             // QueryAccess won't succeed anyway because administrators are always allowed in and the default
             // IsAdministrator if no permissions module is present is true.
-            SceneHelpers.SetupSceneModules(sceneB, config, new object[] { new PermissionsModule() });
+            SceneHelpers.SetupSceneModules(sceneB, config, new object[] { new PermissionsModule(), etmB });
 
             // Shared scene modules
-            SceneHelpers.SetupSceneModules(new Scene[] { sceneA, sceneB }, config, etm, lscm);
+            SceneHelpers.SetupSceneModules(new Scene[] { sceneA, sceneB }, config, lscm);
 
             Vector3 teleportPosition = new Vector3(10, 11, 12);
             Vector3 teleportLookAt = new Vector3(20, 21, 22);
@@ -249,12 +256,13 @@ namespace OpenSim.Region.Framework.Scenes.Tests
             UUID userId = TestHelpers.ParseTail(0x1);
             Vector3 preTeleportPosition = new Vector3(30, 31, 32);
 
-            EntityTransferModule etm = new EntityTransferModule();
+            EntityTransferModule etmA = new EntityTransferModule();
+            EntityTransferModule etmB = new EntityTransferModule();
             LocalSimulationConnectorModule lscm = new LocalSimulationConnectorModule();
 
             IConfigSource config = new IniConfigSource();
             config.AddConfig("Modules");
-            config.Configs["Modules"].Set("EntityTransferModule", etm.Name);
+            config.Configs["Modules"].Set("EntityTransferModule", etmA.Name);
             config.Configs["Modules"].Set("SimulationServices", lscm.Name);
 
             config.AddConfig("EntityTransfer");
@@ -267,8 +275,11 @@ namespace OpenSim.Region.Framework.Scenes.Tests
             TestScene sceneA = sh.SetupScene("sceneA", TestHelpers.ParseTail(0x100), 1000, 1000);
             TestScene sceneB = sh.SetupScene("sceneB", TestHelpers.ParseTail(0x200), 1002, 1000);
 
+            SceneHelpers.SetupSceneModules(sceneA, config, etmA);
+            SceneHelpers.SetupSceneModules(sceneB, config, etmB);
+
             // Shared scene modules
-            SceneHelpers.SetupSceneModules(new Scene[] { sceneA, sceneB }, config, etm, lscm);
+            SceneHelpers.SetupSceneModules(new Scene[] { sceneA, sceneB }, config, lscm);
 
             Vector3 teleportPosition = new Vector3(10, 11, 12);
             Vector3 teleportLookAt = new Vector3(20, 21, 22);
@@ -312,12 +323,13 @@ namespace OpenSim.Region.Framework.Scenes.Tests
 
             UUID userId = TestHelpers.ParseTail(0x1);
 
-            EntityTransferModule etm = new EntityTransferModule();
+            EntityTransferModule etmA = new EntityTransferModule();
+            EntityTransferModule etmB = new EntityTransferModule();
             LocalSimulationConnectorModule lscm = new LocalSimulationConnectorModule();
 
             IConfigSource config = new IniConfigSource();
             IConfig modulesConfig = config.AddConfig("Modules");
-            modulesConfig.Set("EntityTransferModule", etm.Name);
+            modulesConfig.Set("EntityTransferModule", etmA.Name);
             modulesConfig.Set("SimulationServices", lscm.Name);
             IConfig entityTransferConfig = config.AddConfig("EntityTransfer");
 
@@ -329,9 +341,9 @@ namespace OpenSim.Region.Framework.Scenes.Tests
             TestScene sceneA = sh.SetupScene("sceneA", TestHelpers.ParseTail(0x100), 1000, 1000);
             TestScene sceneB = sh.SetupScene("sceneB", TestHelpers.ParseTail(0x200), 1001, 1000);
 
-            SceneHelpers.SetupSceneModules(new Scene[] { sceneA, sceneB }, config, etm, lscm);
-            SceneHelpers.SetupSceneModules(sceneA, new CapabilitiesModule());
-            SceneHelpers.SetupSceneModules(sceneB, new CapabilitiesModule());
+            SceneHelpers.SetupSceneModules(new Scene[] { sceneA, sceneB }, config, lscm);
+            SceneHelpers.SetupSceneModules(sceneA, config, new CapabilitiesModule(), etmA);
+            SceneHelpers.SetupSceneModules(sceneB, config, new CapabilitiesModule(), etmB);
 
             Vector3 teleportPosition = new Vector3(10, 11, 12);
             Vector3 teleportLookAt = new Vector3(20, 21, 22);