Go Home works. With security!!

12 files changed, 468 insertions, 26 deletions

diff --git a/OpenSim/Region/ClientStack/LindenUDP/LLUDPServer.cs b/OpenSim/Region/ClientStack/LindenUDP/LLUDPServer.cs
index 3c4fa72..ffd2546 100644
--- a/OpenSim/Region/ClientStack/LindenUDP/LLUDPServer.cs
+++ b/OpenSim/Region/ClientStack/LindenUDP/LLUDPServer.cs
@@ -38,6 +38,7 @@ using OpenMetaverse.Packets;
 using OpenSim.Framework;
 using OpenSim.Framework.Statistics;
 using OpenSim.Region.Framework.Scenes;
+using OpenSim.Services.Interfaces;
 using OpenMetaverse;
 
 using TokenBucket = OpenSim.Region.ClientStack.LindenUDP.TokenBucket;
@@ -900,6 +901,25 @@ namespace OpenSim.Region.ClientStack.LindenUDP
 
             if (!m_scene.TryGetClient(agentID, out existingClient))
             {
+                IHomeUsersSecurityService security = m_scene.RequestModuleInterface<IHomeUsersSecurityService>();
+                if (security != null)
+                {
+                    IPEndPoint ep = security.GetEndPoint(sessionID);
+                    if (ep != null && ep.ToString() != remoteEndPoint.ToString())
+                    {
+                        // uh-oh, this is fishy
+                        m_log.WarnFormat("[LLUDPSERVER]: Agent {0} with session {1} connecting with unidentified end point. Refusing service.", agentID, sessionID);
+                        m_log.WarnFormat("[LLUDPSERVER]: EP was {0}, now is {1}", ep.ToString(), remoteEndPoint.ToString());
+                        return;
+                    }
+                    else if (ep != null)
+                    {
+                        // ok, you're home, welcome back
+                        m_log.InfoFormat("LLUDPSERVER]: Agent {0} is coming back to this grid", agentID);
+                        security.RemoveEndPoint(sessionID);
+                    }
+                }
+
                 // Create the LLClientView
                 LLClientView client = new LLClientView(remoteEndPoint, m_scene, this, udpClient, sessionInfo, agentID, sessionID, circuitCode);
                 client.OnLogout += LogoutHandler;
diff --git a/OpenSim/Region/CoreModules/Framework/EntityTransfer/EntityTransferModule.cs b/OpenSim/Region/CoreModules/Framework/EntityTransfer/EntityTransferModule.cs
index e85f270..ed8c0fd 100644
--- a/OpenSim/Region/CoreModules/Framework/EntityTransfer/EntityTransferModule.cs
+++ b/OpenSim/Region/CoreModules/Framework/EntityTransfer/EntityTransferModule.cs
@@ -134,8 +134,6 @@ namespace OpenSim.Region.CoreModules.Framework.EntityTransfer
             if (!sp.Scene.Permissions.CanTeleport(sp.UUID))
                 return;
 
-            bool destRegionUp = true;
-
             IEventQueue eq = sp.Scene.RequestModuleInterface<IEventQueue>();
 
             // Reset animations; the viewer does that in teleports.
@@ -240,8 +238,8 @@ namespace OpenSim.Region.CoreModules.Framework.EntityTransfer
         protected void DoTeleport(ScenePresence sp, GridRegion reg, GridRegion finalDestination, Vector3 position, Vector3 lookAt, uint teleportFlags, IEventQueue eq)
         {
             m_log.DebugFormat(
-                "[ENTITY TRANSFER MODULE]: RequestTeleportToLocation to {0} in {1}",
-                position, reg.RegionName);
+                "[ENTITY TRANSFER MODULE]: Request Teleport to {0}:{1}:{2}/{3} final destination {4}",
+                reg.ExternalHostName, reg.HttpPort, reg.RegionName, position, finalDestination.RegionName);
 
             uint newRegionX = (uint)(reg.RegionHandle >> 40);
             uint newRegionY = (((uint)(reg.RegionHandle)) >> 8);
@@ -297,7 +295,7 @@ namespace OpenSim.Region.CoreModules.Framework.EntityTransfer
                 string reason = String.Empty;
 
                 // Let's create an agent there if one doesn't exist yet. 
-                if (!CreateAgent(reg, finalDestination, agentCircuit, teleportFlags, out reason))
+                if (!CreateAgent(sp, reg, finalDestination, agentCircuit, teleportFlags, out reason))
                 {
                     sp.ControllingClient.SendTeleportFailed(String.Format("Destination refused: {0}",
                                                                               reason));
@@ -458,7 +456,7 @@ namespace OpenSim.Region.CoreModules.Framework.EntityTransfer
         }
 
 
-        protected virtual bool CreateAgent(GridRegion reg, GridRegion finalDestination, AgentCircuitData agentCircuit, uint teleportFlags, out string reason)
+        protected virtual bool CreateAgent(ScenePresence sp, GridRegion reg, GridRegion finalDestination, AgentCircuitData agentCircuit, uint teleportFlags, out string reason)
         {
             return m_aScene.SimulationService.CreateAgent(finalDestination, agentCircuit, teleportFlags, out reason);
         }
diff --git a/OpenSim/Region/CoreModules/Framework/EntityTransfer/HGEntityTransferModule.cs b/OpenSim/Region/CoreModules/Framework/EntityTransfer/HGEntityTransferModule.cs
index 0e6323b..d39537d 100644
--- a/OpenSim/Region/CoreModules/Framework/EntityTransfer/HGEntityTransferModule.cs
+++ b/OpenSim/Region/CoreModules/Framework/EntityTransfer/HGEntityTransferModule.cs
@@ -34,6 +34,7 @@ using OpenSim.Region.Framework.Interfaces;
 using OpenSim.Region.Framework.Scenes;
 using OpenSim.Services.Connectors.Hypergrid;
 using OpenSim.Services.Interfaces;
+using OpenSim.Server.Base;
 
 using GridRegion = OpenSim.Services.Interfaces.GridRegion;
 
@@ -59,6 +60,7 @@ namespace OpenSim.Region.CoreModules.Framework.EntityTransfer
         }
 
         private GatekeeperServiceConnector m_GatekeeperConnector;
+        private IHomeUsersSecurityService m_Security;
 
         #region ISharedRegionModule
 
@@ -77,12 +79,42 @@ namespace OpenSim.Region.CoreModules.Framework.EntityTransfer
                 {
                     m_agentsInTransit = new List<UUID>();
                     m_GatekeeperConnector = new GatekeeperServiceConnector();
+
+                    IConfig config = source.Configs["HGEntityTransferModule"];
+                    if (config != null)
+                    {
+                        string dll = config.GetString("HomeUsersSecurityService", string.Empty);
+                        if (dll != string.Empty)
+                        {
+                            Object[] args = new Object[] { source }; 
+                            m_Security = ServerUtils.LoadPlugin<IHomeUsersSecurityService>(dll, args);
+                            if (m_Security == null)
+                                m_log.Debug("[HG ENTITY TRANSFER MODULE]: Unable to load Home Users Security service");
+                            else
+                                m_log.Debug("[HG ENTITY TRANSFER MODULE]: Home Users Security service loaded");
+                        }
+                    }
+                    
                     m_Enabled = true;
                     m_log.InfoFormat("[HG ENTITY TRANSFER MODULE]: {0} enabled.", Name);
                 }
             }
         }
 
+        public override void AddRegion(Scene scene)
+        {
+            base.AddRegion(scene);
+            if (m_Enabled)
+                scene.RegisterModuleInterface<IHomeUsersSecurityService>(m_Security);
+        }
+
+        public override void RemoveRegion(Scene scene)
+        {
+            base.AddRegion(scene);
+            if (m_Enabled)
+                scene.UnregisterModuleInterface<IHomeUsersSecurityService>(m_Security);
+        }
+
 
         #endregion
 
@@ -98,13 +130,25 @@ namespace OpenSim.Region.CoreModules.Framework.EntityTransfer
             return true;
         }
 
-        protected override bool CreateAgent(GridRegion reg, GridRegion finalDestination, AgentCircuitData agentCircuit, uint teleportFlags, out string reason)
+        protected override bool CreateAgent(ScenePresence sp, GridRegion reg, GridRegion finalDestination, AgentCircuitData agentCircuit, uint teleportFlags, out string reason)
         {
             reason = string.Empty;
-            if (reg.RegionLocX != finalDestination.RegionLocX && reg.RegionLocY != finalDestination.RegionLocY)
+            if (reg.RegionLocX != finalDestination.RegionLocX || reg.RegionLocY != finalDestination.RegionLocY)
             {
                 // this user is going to another grid
                 reg.RegionName = finalDestination.RegionName;
+                reg.RegionID = finalDestination.RegionID;
+                reg.RegionLocX = finalDestination.RegionLocX;
+                reg.RegionLocY = finalDestination.RegionLocY;
+                
+                // Log their session and remote endpoint in the home users security service
+                IHomeUsersSecurityService security = sp.Scene.RequestModuleInterface<IHomeUsersSecurityService>();
+                if (security != null)
+                    security.SetEndPoint(sp.ControllingClient.SessionId, sp.ControllingClient.RemoteEndPoint);
+
+                // Log them out of this grid
+                sp.Scene.PresenceService.LogoutAgent(agentCircuit.SessionID, sp.AbsolutePosition, sp.Lookat);
+
                 return m_GatekeeperConnector.CreateAgent(reg, agentCircuit, teleportFlags, out reason);
             }
 
@@ -145,6 +189,26 @@ namespace OpenSim.Region.CoreModules.Framework.EntityTransfer
 
             Vector3 position = Vector3.UnitY, lookAt = Vector3.UnitY;
             GridRegion finalDestination = m_GatekeeperConnector.GetHomeRegion(homeGatekeeper, aCircuit.AgentID, out position, out lookAt);
+            if (finalDestination == null)
+            {
+                client.SendTeleportFailed("Your home region could not be found");
+                m_log.DebugFormat("[HG ENTITY TRANSFER MODULE]: Agent's home region not found");
+                return;
+            }
+
+            ScenePresence sp = ((Scene)(client.Scene)).GetScenePresence(client.AgentId);
+            if (sp == null)
+            {
+                client.SendTeleportFailed("Internal error");
+                m_log.DebugFormat("[HG ENTITY TRANSFER MODULE]: Agent not found in the scene where it is supposed to be");
+                return;
+            }
+
+            m_log.DebugFormat("[HG ENTITY TRANSFER MODULE]: teleporting user {0} {1} home to {2} via {3}:{4}:{5}", 
+                aCircuit.firstname, aCircuit.lastname, finalDestination.RegionName, homeGatekeeper.ExternalHostName, homeGatekeeper.HttpPort, homeGatekeeper.RegionName);
+
+            IEventQueue eq = sp.Scene.RequestModuleInterface<IEventQueue>();
+            DoTeleport(sp, homeGatekeeper, finalDestination, position, lookAt, (uint)(Constants.TeleportFlags.SetLastToTarget | Constants.TeleportFlags.ViaHome), eq);
         }
         #endregion
 
@@ -159,6 +223,7 @@ namespace OpenSim.Region.CoreModules.Framework.EntityTransfer
             region.ExternalHostName = uri.Host;
             region.HttpPort = (uint)uri.Port;
             region.RegionName = string.Empty;
+            region.InternalEndPoint = new System.Net.IPEndPoint(System.Net.IPAddress.Parse("0.0.0.0"), (int)0);
             return region;
         }
     }
diff --git a/OpenSim/Region/CoreModules/Resources/CoreModulePlugin.addin.xml b/OpenSim/Region/CoreModules/Resources/CoreModulePlugin.addin.xml
index c61198d..0e3739a 100644
--- a/OpenSim/Region/CoreModules/Resources/CoreModulePlugin.addin.xml
+++ b/OpenSim/Region/CoreModules/Resources/CoreModulePlugin.addin.xml
@@ -62,7 +62,7 @@
         <RegionModule id="InventoryServiceInConnectorModule" type="OpenSim.Region.CoreModules.ServiceConnectorsIn.Inventory.InventoryServiceInConnectorModule" />
         <RegionModule id="LandServiceInConnectorModule" type="OpenSim.Region.CoreModules.ServiceConnectorsIn.Land.LandServiceInConnectorModule" />
         <RegionModule id="NeighbourServiceInConnectorModule" type="OpenSim.Region.CoreModules.ServiceConnectorsIn.Neighbour.NeighbourServiceInConnectorModule" />    \
-        <RegionModule id="HypergridServiceInConnectorModule" type="OpenSim.Region.CoreModules.ServiceConnectorsIn.Grid.HypergridServiceInConnectorModule" />    \
+        <RegionModule id="HypergridServiceInConnectorModule" type="OpenSim.Region.CoreModules.ServiceConnectorsIn.Hypergrid.HypergridServiceInConnectorModule" />    \
         <RegionModule id="LLLoginServiceInConnectorModule" type="OpenSim.Region.CoreModules.ServiceConnectorsIn.Login.LLLoginServiceInConnectorModule" />    \
         <RegionModule id="SimulationServiceInConnectorModule" type="OpenSim.Region.CoreModules.ServiceConnectorsIn.Simulation.SimulationServiceInConnectorModule" />    \
         <RegionModule id="GridInfoServiceInConnectorModule" type="OpenSim.Region.CoreModules.ServiceConnectorsIn.Grid.GridInfoServiceInConnectorModule" />    \
diff --git a/OpenSim/Region/CoreModules/ServiceConnectorsIn/Grid/HypergridServiceInConnectorModule.cs b/OpenSim/Region/CoreModules/ServiceConnectorsIn/Hypergrid/HypergridServiceInConnectorModule.cs
index 6ec0fcf..6e6946c 100644
--- a/OpenSim/Region/CoreModules/ServiceConnectorsIn/Grid/HypergridServiceInConnectorModule.cs
+++ b/OpenSim/Region/CoreModules/ServiceConnectorsIn/Hypergrid/HypergridServiceInConnectorModule.cs
@@ -40,7 +40,7 @@ using OpenSim.Server.Handlers.Hypergrid;
 using OpenSim.Services.Interfaces;
 using GridRegion = OpenSim.Services.Interfaces.GridRegion;
 
-namespace OpenSim.Region.CoreModules.ServiceConnectorsIn.Grid
+namespace OpenSim.Region.CoreModules.ServiceConnectorsIn.Hypergrid
 {
     public class HypergridServiceInConnectorModule : ISharedRegionModule
     {
@@ -119,6 +119,7 @@ namespace OpenSim.Region.CoreModules.ServiceConnectorsIn.Grid
                 ISimulationService simService = scene.RequestModuleInterface<ISimulationService>();
                 m_HypergridHandler = new GatekeeperServiceInConnector(m_Config, MainServer.Instance, simService);
                 //ServerUtils.LoadPlugin<HypergridServiceInConnector>("OpenSim.Server.Handlers.dll:HypergridServiceInConnector", args);
+                scene.RegisterModuleInterface<IGatekeeperService>(m_HypergridHandler.GateKeeper);
             }
         }
 
diff --git a/OpenSim/Server/Handlers/Hypergrid/GatekeeperServerConnector.cs b/OpenSim/Server/Handlers/Hypergrid/GatekeeperServerConnector.cs
index f03d33a..15b29d2 100644
--- a/OpenSim/Server/Handlers/Hypergrid/GatekeeperServerConnector.cs
+++ b/OpenSim/Server/Handlers/Hypergrid/GatekeeperServerConnector.cs
@@ -46,6 +46,10 @@ namespace OpenSim.Server.Handlers.Hypergrid
                 MethodBase.GetCurrentMethod().DeclaringType);
 
         private IGatekeeperService m_GatekeeperService;
+        public IGatekeeperService GateKeeper
+        {
+            get { return m_GatekeeperService; }
+        }
 
         public GatekeeperServiceInConnector(IConfigSource config, IHttpServer server, ISimulationService simService) :
                 base(config, server, String.Empty)
diff --git a/OpenSim/Server/Handlers/Hypergrid/HomeUsersSecurityServerConnector.cs b/OpenSim/Server/Handlers/Hypergrid/HomeUsersSecurityServerConnector.cs
new file mode 100644
index 0000000..5379784
--- /dev/null
+++ b/OpenSim/Server/Handlers/Hypergrid/HomeUsersSecurityServerConnector.cs
@@ -0,0 +1,122 @@
+using System;
+using System.Collections;
+using System.Collections.Generic;
+using System.Net;
+using System.Reflection;
+
+using Nini.Config;
+using OpenSim.Framework;
+using OpenSim.Server.Base;
+using OpenSim.Services.Interfaces;
+using OpenSim.Framework.Servers.HttpServer;
+using OpenSim.Server.Handlers.Base;
+
+using log4net;
+using Nwc.XmlRpc;
+using OpenMetaverse;
+
+namespace OpenSim.Server.Handlers.Hypergrid
+{
+    public class HomeUsersSecurityServerConnector : ServiceConnector
+    {
+        private static readonly ILog m_log =
+                LogManager.GetLogger(
+                MethodBase.GetCurrentMethod().DeclaringType);
+
+        private IHomeUsersSecurityService m_HomeUsersService;
+
+        public HomeUsersSecurityServerConnector(IConfigSource config, IHttpServer server) :
+                base(config, server, String.Empty)
+        {
+            IConfig gridConfig = config.Configs["HomeUsersSecurityService"];
+            if (gridConfig != null)
+            {
+                string serviceDll = gridConfig.GetString("LocalServiceModule", string.Empty);
+                Object[] args = new Object[] { config };
+                m_HomeUsersService = ServerUtils.LoadPlugin<IHomeUsersSecurityService>(serviceDll, args);
+            }
+            if (m_HomeUsersService == null)
+                throw new Exception("HomeUsersSecurity server connector cannot proceed because of missing service");
+
+            server.AddXmlRPCHandler("ep_get", GetEndPoint, false);
+            server.AddXmlRPCHandler("ep_set", SetEndPoint, false);
+            server.AddXmlRPCHandler("ep_remove", RemoveEndPoint, false);
+
+        }
+
+        public XmlRpcResponse GetEndPoint(XmlRpcRequest request, IPEndPoint remoteClient)
+        {
+            Hashtable requestData = (Hashtable)request.Params[0];
+            //string host = (string)requestData["host"];
+            //string portstr = (string)requestData["port"];
+            string sessionID_str = (string)requestData["sessionID"];
+            UUID sessionID = UUID.Zero;
+            UUID.TryParse(sessionID_str, out sessionID);
+
+            IPEndPoint ep = m_HomeUsersService.GetEndPoint(sessionID);
+
+            Hashtable hash = new Hashtable();
+            if (ep == null)
+                hash["result"] = "false";
+            else
+            {
+                hash["result"] = "true";
+                hash["ep_addr"] = ep.Address.ToString();
+                hash["ep_port"] = ep.Port.ToString();
+            }
+            XmlRpcResponse response = new XmlRpcResponse();
+            response.Value = hash;
+            return response;
+
+        }
+
+        public XmlRpcResponse SetEndPoint(XmlRpcRequest request, IPEndPoint remoteClient)
+        {
+            Hashtable requestData = (Hashtable)request.Params[0];
+            string host = (string)requestData["ep_addr"];
+            string portstr = (string)requestData["ep_port"];
+            string sessionID_str = (string)requestData["sessionID"];
+            UUID sessionID = UUID.Zero;
+            UUID.TryParse(sessionID_str, out sessionID);
+            int port = 0;
+            Int32.TryParse(portstr, out port);
+
+            IPEndPoint ep = null;
+            try
+            {
+                ep = new IPEndPoint(IPAddress.Parse(host), port);
+            }
+            catch
+            {
+                m_log.Debug("[HOME USERS SECURITY]: Exception in creating EndPoint");
+            }
+
+            m_HomeUsersService.SetEndPoint(sessionID, ep);
+
+            Hashtable hash = new Hashtable();
+            hash["result"] = "true";
+            XmlRpcResponse response = new XmlRpcResponse();
+            response.Value = hash;
+            return response;
+
+        }
+
+        public XmlRpcResponse RemoveEndPoint(XmlRpcRequest request, IPEndPoint remoteClient)
+        {
+            Hashtable requestData = (Hashtable)request.Params[0];
+            string sessionID_str = (string)requestData["sessionID"];
+            UUID sessionID = UUID.Zero;
+            UUID.TryParse(sessionID_str, out sessionID);
+
+            m_HomeUsersService.RemoveEndPoint(sessionID);
+
+            Hashtable hash = new Hashtable();
+            hash["result"] = "true";
+            XmlRpcResponse response = new XmlRpcResponse();
+            response.Value = hash;
+            return response;
+
+        }
+
+    }
+}
diff --git a/OpenSim/Services/Connectors/Hypergrid/HomeUsersSecurityServiceConnector.cs b/OpenSim/Services/Connectors/Hypergrid/HomeUsersSecurityServiceConnector.cs
new file mode 100644
index 0000000..150690b
--- /dev/null
+++ b/OpenSim/Services/Connectors/Hypergrid/HomeUsersSecurityServiceConnector.cs
@@ -0,0 +1,132 @@
+using System;
+using System.Collections;
+using System.Collections.Generic;
+using System.Net;
+using System.Reflection;
+
+using OpenSim.Services.Interfaces;
+
+using OpenMetaverse;
+using log4net;
+using Nwc.XmlRpc;
+using Nini.Config;
+
+namespace OpenSim.Services.Connectors.Hypergrid
+{
+    public class HomeUsersSecurityServiceConnector : IHomeUsersSecurityService
+    {
+        private static readonly ILog m_log =
+            LogManager.GetLogger(
+            MethodBase.GetCurrentMethod().DeclaringType);
+
+        string m_ServerURL;
+        public HomeUsersSecurityServiceConnector(string url)
+        {
+            m_ServerURL = url;
+        }
+
+        public HomeUsersSecurityServiceConnector(IConfigSource config)
+        {
+        }
+
+        public void SetEndPoint(UUID sessionID, IPEndPoint ep)
+        {
+            Hashtable hash = new Hashtable();
+            hash["sessionID"] = sessionID.ToString();
+            hash["ep_addr"] = ep.Address.ToString();
+            hash["ep_port"] = ep.Port.ToString();
+
+            Call("ep_set",  hash);
+        }
+
+        public void RemoveEndPoint(UUID sessionID)
+        {
+            Hashtable hash = new Hashtable();
+            hash["sessionID"] = sessionID.ToString();
+
+            Call("ep_remove", hash);
+        }
+
+        public IPEndPoint GetEndPoint(UUID sessionID)
+        {
+            Hashtable hash = new Hashtable();
+            hash["sessionID"] = sessionID.ToString();
+
+            IList paramList = new ArrayList();
+            paramList.Add(hash);
+
+            XmlRpcRequest request = new XmlRpcRequest("ep_get", paramList);
+            //m_log.Debug("[HGrid]: Linking to " + uri);
+            XmlRpcResponse response = null;
+            try
+            {
+                response = request.Send(m_ServerURL, 10000);
+            }
+            catch (Exception e)
+            {
+                m_log.Debug("[HGrid]: Exception " + e.Message);
+                return null;
+            }
+
+            if (response.IsFault)
+            {
+                m_log.ErrorFormat("[HGrid]: remote call returned an error: {0}", response.FaultString);
+                return null;
+            }
+
+            hash = (Hashtable)response.Value;
+            //foreach (Object o in hash)
+            //    m_log.Debug(">> " + ((DictionaryEntry)o).Key + ":" + ((DictionaryEntry)o).Value);
+            try
+            {
+                bool success = false;
+                Boolean.TryParse((string)hash["result"], out success);
+                if (success)
+                {
+                    IPEndPoint ep = null;
+                    int port = 0;
+                    if (hash["ep_port"] != null)
+                        Int32.TryParse((string)hash["ep_port"], out port);
+                    if (hash["ep_addr"] != null)
+                        ep = new IPEndPoint(IPAddress.Parse((string)hash["ep_addr"]), port);
+
+                    return ep;
+                }
+
+            }
+            catch (Exception e)
+            {
+                m_log.Error("[HGrid]: Got exception while parsing GetEndPoint response " + e.StackTrace);
+                return null;
+            }
+
+            return null;
+        }
+
+        private void Call(string method, Hashtable hash)
+        {
+            IList paramList = new ArrayList();
+            paramList.Add(hash);
+
+            XmlRpcRequest request = new XmlRpcRequest(method, paramList);
+            XmlRpcResponse response = null;
+            try
+            {
+                response = request.Send(m_ServerURL, 10000);
+            }
+            catch (Exception e)
+            {
+                m_log.Debug("[HGrid]: Exception " + e.Message);
+                return ;
+            }
+
+            if (response.IsFault)
+            {
+                m_log.ErrorFormat("[HGrid]: remote call returned an error: {0}", response.FaultString);
+                return ;
+            }
+
+        }
+
+    }
+}
diff --git a/OpenSim/Services/HypergridService/GatekeeperService.cs b/OpenSim/Services/HypergridService/GatekeeperService.cs
index 55d9ce1..169cfa3 100644
--- a/OpenSim/Services/HypergridService/GatekeeperService.cs
+++ b/OpenSim/Services/HypergridService/GatekeeperService.cs
@@ -27,6 +27,7 @@
 
 using System;
 using System.Collections.Generic;
+using System.Net;
 using System.Reflection;
 
 using OpenSim.Framework;
@@ -51,6 +52,7 @@ namespace OpenSim.Services.HypergridService
         IPresenceService m_PresenceService;
         IAuthenticationService m_AuthenticationService;
         IUserAccountService m_UserAccountService;
+        IHomeUsersSecurityService m_HomeUsersSecurityService;
         ISimulationService m_SimulationService;
 
         string m_AuthDll;
@@ -66,14 +68,15 @@ namespace OpenSim.Services.HypergridService
                 throw new Exception(String.Format("No section GatekeeperService in config file"));
 
             string accountService = serverConfig.GetString("UserAccountService", String.Empty);
+            string homeUsersSecurityService = serverConfig.GetString("HomeUsersSecurityService", string.Empty);
             string gridService = serverConfig.GetString("GridService", String.Empty);
             string presenceService = serverConfig.GetString("PresenceService", String.Empty);
             string simulationService = serverConfig.GetString("SimulationService", String.Empty);
 
             m_AuthDll = serverConfig.GetString("AuthenticationService", String.Empty);
 
-            if (accountService == string.Empty || gridService == string.Empty ||
-                presenceService == string.Empty || m_AuthDll == string.Empty)
+            // These 3 are mandatory, the others aren't
+            if (gridService == string.Empty || presenceService == string.Empty || m_AuthDll == string.Empty)
                 throw new Exception("Incomplete specifications, Gatekeeper Service cannot function.");
             
             string scope = serverConfig.GetString("ScopeID", UUID.Zero.ToString());
@@ -82,16 +85,20 @@ namespace OpenSim.Services.HypergridService
             m_AllowTeleportsToAnyRegion = serverConfig.GetBoolean("AllowTeleportsToAnyRegion", true);
 
             Object[] args = new Object[] { config };
-            m_UserAccountService = ServerUtils.LoadPlugin<IUserAccountService>(accountService, args);
             m_GridService = ServerUtils.LoadPlugin<IGridService>(gridService, args);
             m_PresenceService = ServerUtils.LoadPlugin<IPresenceService>(presenceService, args);
+
+            if (accountService != string.Empty)
+                m_UserAccountService = ServerUtils.LoadPlugin<IUserAccountService>(accountService, args);
+            if (homeUsersSecurityService != string.Empty)
+                m_HomeUsersSecurityService = ServerUtils.LoadPlugin<IHomeUsersSecurityService>(homeUsersSecurityService, args);
+
             if (simService != null)
                 m_SimulationService = simService;
             else if (simulationService != string.Empty)
                     m_SimulationService = ServerUtils.LoadPlugin<ISimulationService>(simulationService, args);
 
-            if (m_UserAccountService == null || m_GridService == null ||
-                m_PresenceService == null || m_SimulationService == null)
+            if (m_GridService == null || m_PresenceService == null || m_SimulationService == null)
                 throw new Exception("Unable to load a required plugin, Gatekeeper Service cannot function.");
 
             m_log.Debug("[GATEKEEPER SERVICE]: Starting...");
@@ -183,17 +190,31 @@ namespace OpenSim.Services.HypergridService
             }
             m_log.DebugFormat("[GATEKEEPER SERVICE]: Identity verified for {0} {1} @ {2}", aCircuit.firstname, aCircuit.lastname, authURL);
 
-            // Check to see if we have a local user with that UUID
-            UserAccount account = m_UserAccountService.GetUserAccount(m_ScopeID, aCircuit.AgentID);
-            if (account != null)
-            {
-                // No, sorry; go away
-                reason = "User identifier not allowed on this grid";
-                m_log.InfoFormat("[GATEKEEPER SERVICE]: Foreign agent {0} {1} has UUID of local user {3}. Refusing service.", 
-                    aCircuit.firstname, aCircuit.lastname, aCircuit.AgentID);
-                return false;
-            }
-            m_log.DebugFormat("[GATEKEEPER SERVICE]: User ID ok");
+            //if (m_UserAccountService != null && m_HomeUsersSecurityService != null)
+            //{
+            //    // Check to see if we have a local user with that UUID
+            //    UserAccount account = m_UserAccountService.GetUserAccount(m_ScopeID, aCircuit.AgentID);
+
+            //    // See if that user went out of this home grid
+            //    IPEndPoint ep = m_HomeUsersSecurityService.GetEndPoint(aCircuit.AgentID);
+
+            //    if (account != null)
+            //    {
+            //        if ((ep == null) || // there's no memory of this agent going out
+            //            (ep != null && (ep.Address != aCircuit.ClientEndPoint.Address || ep.Port != aCircuit.ClientEndPoint.Port))) // fake agent
+            //        {
+            //            // No, sorry; go away
+            //            reason = "User identifier not allowed on this grid";
+            //            m_log.InfoFormat("[GATEKEEPER SERVICE]: Foreign agent {0} {1} has UUID of local user {2}. Refusing service.",
+            //                aCircuit.firstname, aCircuit.lastname, aCircuit.AgentID);
+            //            return false;
+            //        }
+            //        else
+            //        {
+            //        }
+            //    }
+            //    m_log.DebugFormat("[GATEKEEPER SERVICE]: User ID ok");
+            //}
 
             // May want to authorize
 
diff --git a/OpenSim/Services/HypergridService/HomeUsersSecurityService.cs b/OpenSim/Services/HypergridService/HomeUsersSecurityService.cs
new file mode 100644
index 0000000..a7adfc1
--- /dev/null
+++ b/OpenSim/Services/HypergridService/HomeUsersSecurityService.cs
@@ -0,0 +1,67 @@
+using System;
+using System.Collections.Generic;
+using System.Net;
+using System.Reflection;
+
+using OpenSim.Services.Interfaces;
+
+using OpenMetaverse;
+using log4net;
+using Nini.Config;
+
+namespace OpenSim.Services.HypergridService
+{
+    /// <summary>
+    /// This service is for HG1.5 only, to make up for the fact that clients don't
+    /// keep any private information in themselves, and that their 'home service'
+    /// needs to do it for them.
+    /// Once we have better clients, this shouldn't be needed.
+    /// </summary>
+    public class HomeUsersSecurityService : IHomeUsersSecurityService
+    {
+        private static readonly ILog m_log =
+                LogManager.GetLogger(
+                MethodBase.GetCurrentMethod().DeclaringType);
+
+        //
+        // This is a persistent storage wannabe for dealing with the
+        // quirks of HG1.5. We don't really want to store this in a table.
+        // But this is the necessary information for securing clients
+        // coming home.
+        //
+        protected static Dictionary<UUID, IPEndPoint> m_ClientEndPoints = new Dictionary<UUID, IPEndPoint>();
+
+        public HomeUsersSecurityService(IConfigSource config)
+        {
+            m_log.DebugFormat("[HOME USERS SECURITY]: Starting...");
+        }
+
+        public void SetEndPoint(UUID sessionID, IPEndPoint ep)
+        {
+            m_log.DebugFormat("[HOME USERS SECURITY]: Set EndPoint {0} for session {1}", ep.ToString(), sessionID);
+
+            lock (m_ClientEndPoints)
+                m_ClientEndPoints[sessionID] = ep;
+        }
+
+        public IPEndPoint GetEndPoint(UUID sessionID)
+        {
+            lock (m_ClientEndPoints)
+                if (m_ClientEndPoints.ContainsKey(sessionID))
+                {
+                    m_log.DebugFormat("[HOME USERS SECURITY]: Get EndPoint {0} for session {1}", m_ClientEndPoints[sessionID].ToString(), sessionID);
+                    return m_ClientEndPoints[sessionID];
+                }
+
+            return null;
+        }
+
+        public void RemoveEndPoint(UUID sessionID)
+        {
+            m_log.DebugFormat("[HOME USERS SECURITY]: Remove EndPoint for session {0}", sessionID);
+            lock (m_ClientEndPoints)
+                if (m_ClientEndPoints.ContainsKey(sessionID))
+                    m_ClientEndPoints.Remove(sessionID);
+        }
+    }
+}
diff --git a/OpenSim/Services/Interfaces/IGatekeeperService.cs b/OpenSim/Services/Interfaces/IGatekeeperService.cs
index 59e0f82..5b5c9d1 100644
--- a/OpenSim/Services/Interfaces/IGatekeeperService.cs
+++ b/OpenSim/Services/Interfaces/IGatekeeperService.cs
@@ -26,6 +26,7 @@
  */
 
 using System;
+using System.Net;
 using System.Collections.Generic;
 
 using OpenSim.Framework;
@@ -43,4 +44,14 @@ namespace OpenSim.Services.Interfaces
         GridRegion GetHomeRegion(UUID userID, out Vector3 position, out Vector3 lookAt);
 
     }
+
+    /// <summary>
+    /// HG1.5 only
+    /// </summary>
+    public interface IHomeUsersSecurityService
+    {
+        void SetEndPoint(UUID sessionID, IPEndPoint ep);
+        IPEndPoint GetEndPoint(UUID sessionID);
+        void RemoveEndPoint(UUID sessionID);
+    }
 }
diff --git a/OpenSim/Services/Interfaces/IHypergridService.cs b/OpenSim/Services/Interfaces/IHypergridService.cs
index dd3c053..86ef1b4 100644
--- a/OpenSim/Services/Interfaces/IHypergridService.cs
+++ b/OpenSim/Services/Interfaces/IHypergridService.cs
@@ -43,6 +43,7 @@ namespace OpenSim.Services.Interfaces
         GridRegion GetRegionByName(string name);
         List<GridRegion> GetRegionsByName(string name);
         List<GridRegion> GetRegionRange(int xmin, int xmax, int ymin, int ymax);
+
     }
 
 }