* Fix for mantis 0000040 After client logout remote host closed connection on Simulator makes sim unuseable->'Closed Connection Called'

* I've fundamentally changed a few things, so this is experimental
* The routine that I used needs to be tested on Linux.  I don't expect it to cause a problem, but hey, it might.
* Child agents are still not logged off properly, so when the first set time out, the second set get logged off also, on the second log in if the second login is initiated before the first one fully times out.

OpenSim/Framework/IScene.cs

@@ -46,6 +46,7 @@ namespace OpenSim.Framework
 
         void AddNewClient(IClientAPI client, bool child);
         void RemoveClient(LLUUID agentID);
+        void CloseAllAgents(uint circuitcode);
 
         void Restart(int seconds);
         bool OtherRegionUp(RegionInfo thisRegion);

OpenSim/Region/ClientStack/ClientView.cs

@@ -209,8 +209,8 @@ namespace OpenSim.Region.ClientStack
             m_scene.RemoveClient(AgentId);
 
             // Send the STOP packet 
-            //libsecondlife.Packets.DisableSimulatorPacket disable = new libsecondlife.Packets.DisableSimulatorPacket();
+            DisableSimulatorPacket disable = new DisableSimulatorPacket();
-            //OutPacket(disable, ThrottleOutPacketType.Task);
+            OutPacket(disable, ThrottleOutPacketType.Task);
 
             // FLUSH Packets
             m_packetQueue.Close();
@@ -226,6 +226,10 @@ namespace OpenSim.Region.ClientStack
             // flushing out all it's packets.  There should probably
             // be a better mechanism here
             
+            // We can't reach into other scenes and close the connection 
+            // We need to do this over grid communications
+            m_scene.CloseAllAgents(CircuitCode);
+
             m_clientThread.Abort();
         }
 

OpenSim/Region/ClientStack/PacketServer.cs

@@ -123,13 +123,16 @@ namespace OpenSim.Region.ClientStack
         /// <param name="circuitcode"></param>
         public virtual void CloseCircuit(uint circuitcode)
         {
+            OpenSim.Framework.Console.MainLog.Instance.Debug("PACKETSERVER", "Removing Circuit Code");
             m_networkHandler.RemoveClientCircuit(circuitcode);
-            m_scene.ClientManager.CloseAllAgents(circuitcode);
+            OpenSim.Framework.Console.MainLog.Instance.Debug("PACKETSERVER", "Removed Circuit Code");
+            //m_scene.ClientManager.CloseAllAgents(circuitcode);
         }
 
         public virtual void CloseClient(IClientAPI client)
         {
             CloseCircuit(client.CircuitCode);
+            client.Close();
         }
     }
 }

OpenSim/Region/ClientStack/UDPServer.cs

@@ -119,16 +119,48 @@ namespace OpenSim.Region.ClientStack
                 {
                     case SocketError.AlreadyInProgress:
                     case SocketError.NetworkReset:
-                    default:
+                    case SocketError.ConnectionReset:
-                        Console.WriteLine("Remote host Closed connection");
+                        try
+                        {
                             CloseEndPoint(epSender);
+                        }
+                        catch (System.Exception a)
+                        {
+                            MainLog.Instance.Verbose("UDPSERVER", a.ToString());
+                        }
+                        try
+                        {
+                            Server.BeginReceiveFrom(RecvBuffer, 0, RecvBuffer.Length, SocketFlags.None, ref epSender, ReceivedData, null);
+                            
+                            // Ter: For some stupid reason ConnectionReset basically kills our async event structure..  
+                            // so therefore..  we've got to tell the server to BeginReceiveFrom again.
+                            // This will happen over and over until we've gone through all packets 
+                            // sent to and from this particular user.
+                            // Stupid I know..  
+                            // but Flusing the buffer would be even more stupid...  so, we're stuck with this ugly method.
+                        
+                        }
+                        catch (SocketException)
+                        {
+                            
+                        }
+                        break;
+                    default:
+                        // Here's some reference code!   :D  
+                        // Shutdown and restart the UDP listener!  hehe
+                        // Shiny
+                        
+                        //Server.Shutdown(SocketShutdown.Both);
+                        //CloseEndPoint(epSender);
+                        //ServerListener();
                         break;
                 }
 
                 return;
             }
-            catch (System.ObjectDisposedException)
+            catch (System.ObjectDisposedException e)
             {
+                MainLog.Instance.Debug("UDPSERVER", e.ToString());
                 return;
             }
 
@@ -138,8 +170,9 @@ namespace OpenSim.Region.ClientStack
             {
                 packet = Packet.BuildPacket(RecvBuffer, ref packetEnd, ZeroBuffer);
             }
-            catch(Exception)
+            catch(Exception e)
             {
+                MainLog.Instance.Debug("UDPSERVER", e.ToString());
             }
 
             // do we already have a circuit for this endpoint
@@ -147,18 +180,21 @@ namespace OpenSim.Region.ClientStack
             if (clientCircuits.TryGetValue(epSender, out circuit))
             {
                 //if so then send packet to the packetserver
+                //MainLog.Instance.Warn("UDPSERVER", "ALREADY HAVE Circuit!");
                 m_packetServer.InPacket(circuit, packet);
             }
             else if (packet.Type == PacketType.UseCircuitCode)
             {
                 // new client
+                MainLog.Instance.Debug("UDPSERVER", "Adding New Client");
                 AddNewClient(packet);
             }
             else
             {
+
                 // invalid client
                 //CFK: This message seems to have served its usefullness as of 12-15 so I am commenting it out for now
-                //CFK: m_log.Warn("client", "Got a packet from an invalid client - " + epSender.ToString());
+                //m_log.Warn("client", "Got a packet from an invalid client - " + epSender.ToString());
             }
 
             Server.BeginReceiveFrom(RecvBuffer, 0, RecvBuffer.Length, SocketFlags.None, ref epSender, ReceivedData, null);
@@ -169,7 +205,9 @@ namespace OpenSim.Region.ClientStack
             uint circuit;
             if (clientCircuits.TryGetValue(sender, out circuit))
             {
+                MainLog.Instance.Debug("UDPSERVER", "CloseEndPoint:ClosingCircuit");
                 m_packetServer.CloseCircuit(circuit);
+                MainLog.Instance.Debug("UDPSERVER", "CloseEndPoint:ClosedCircuit");
             }
         }
 
@@ -222,8 +260,13 @@ namespace OpenSim.Region.ClientStack
             EndPoint sendto = null;
             if (clientCircuits_reverse.TryGetValue(circuitcode, out sendto))
             {
+                MainLog.Instance.Debug("UDPSERVER", "RemovingClientCircuit");
                 clientCircuits.Remove(sendto);
+                MainLog.Instance.Debug("UDPSERVER", "Removed Client Circuit");
+
+                MainLog.Instance.Debug("UDPSERVER", "Removing Reverse ClientCircuit");
                 clientCircuits_reverse.Remove(circuitcode);
+                MainLog.Instance.Debug("UDPSERVER", "Removed Reverse ClientCircuit");
             }
         }
     }

OpenSim/Region/Environment/Scenes/Scene.cs

@@ -1243,7 +1243,12 @@ namespace OpenSim.Region.Environment.Scenes
             // Remove client agent from profile, so new logins will work
             CommsManager.UserService.clearUserAgent(agentID);
         }
+        public override void CloseAllAgents(uint circuitcode) 
+        {
+            // Called by ClientView to kill all circuit codes
+            ClientManager.CloseAllAgents(circuitcode);
 
+        }
         public void NotifyMyCoarseLocationChange()
         {
             ForEachScenePresence(delegate(ScenePresence presence) { presence.CoarseLocationChange(); });

OpenSim/Region/Environment/Scenes/SceneBase.cs

@@ -130,6 +130,8 @@ namespace OpenSim.Region.Environment.Scenes
         /// <param name="agentID"></param>
         public abstract void RemoveClient(LLUUID agentID);
 
+        public abstract void CloseAllAgents(uint circuitcode);
+
         #endregion
 
         /// <summary>