From a9878401919a9946e0b2d679a8590ae13539b11d Mon Sep 17 00:00:00 2001
From: Justin Clarke Casey
Date: Tue, 3 Jun 2008 20:27:52 +0000
Subject: * Stop the crash to bash of the entire region server when a client
 thread fails by catching the exception in AuthUser() instead of letting it
 propogate out of the thread

---
 .../Region/ClientStack/LindenUDP/LLClientView.cs   | 58 ++++++++++++++--------
 1 file changed, 36 insertions(+), 22 deletions(-)

(limited to 'OpenSim')

diff --git a/OpenSim/Region/ClientStack/LindenUDP/LLClientView.cs b/OpenSim/Region/ClientStack/LindenUDP/LLClientView.cs
index 0ef7f26..d9fefb4 100644
--- a/OpenSim/Region/ClientStack/LindenUDP/LLClientView.cs
+++ b/OpenSim/Region/ClientStack/LindenUDP/LLClientView.cs
@@ -688,34 +688,48 @@ namespace OpenSim.Region.ClientStack.LindenUDP
             m_scene.AddNewClient(this, true);
         }
 
+        /// <summary>
+        /// Authorize an incoming user session.  This method lies at the base of the entire client thread.
+        /// </summary>
         protected virtual void AuthUser()
         {
-            // AuthenticateResponse sessionInfo = m_gridServer.AuthenticateSession(m_cirpack.m_circuitCode.m_sessionId, m_cirpack.m_circuitCode.ID, m_cirpack.m_circuitCode.Code);
-            AuthenticateResponse sessionInfo =
-                m_authenticateSessionsHandler.AuthenticateSession(m_sessionId, m_agentId,
-                                                                  m_circuitCode);
-            if (!sessionInfo.Authorised)
-            {
-                //session/circuit not authorised
-                m_log.Info("[CLIENT]: New user request denied to " + m_userEndPoint.ToString());
-                m_packetQueue.Close();
-                m_clientThread.Abort();
-            }
-            else
+            try
             {
-                m_log.Info("[CLIENT]: Got authenticated connection from " + m_userEndPoint.ToString());
-                //session is authorised
-                m_firstName = sessionInfo.LoginInfo.First;
-                m_lastName = sessionInfo.LoginInfo.Last;
-
-                if (sessionInfo.LoginInfo.SecureSession != LLUUID.Zero)
+                // AuthenticateResponse sessionInfo = m_gridServer.AuthenticateSession(m_cirpack.m_circuitCode.m_sessionId, m_cirpack.m_circuitCode.ID, m_cirpack.m_circuitCode.Code);
+                AuthenticateResponse sessionInfo =
+                    m_authenticateSessionsHandler.AuthenticateSession(m_sessionId, m_agentId,
+                                                                      m_circuitCode);
+                if (!sessionInfo.Authorised)
                 {
-                    m_secureSessionId = sessionInfo.LoginInfo.SecureSession;
+                    //session/circuit not authorised
+                    m_log.Info("[CLIENT]: New user request denied to " + m_userEndPoint.ToString());
+                    m_packetQueue.Close();
+                    m_clientThread.Abort();
                 }
-                // This sets up all the timers
-                InitNewClient();
+                else
+                {
+                    m_log.Info("[CLIENT]: Got authenticated connection from " + m_userEndPoint.ToString());
+                    //session is authorised
+                    m_firstName = sessionInfo.LoginInfo.First;
+                    m_lastName = sessionInfo.LoginInfo.Last;
+
+                    if (sessionInfo.LoginInfo.SecureSession != LLUUID.Zero)
+                    {
+                        m_secureSessionId = sessionInfo.LoginInfo.SecureSession;
+                    }
+                    // This sets up all the timers
+                    InitNewClient();
 
-                ClientLoop();
+                    ClientLoop();
+                }
+            }
+            catch (Exception e)
+            {
+                // Don't let a failure in an individual client thread crash the whole sim.
+                // FIXME: possibly more sophisticated cleanup since leaving client resources around will
+                // probably cause long term instability.  I think this is still better than bring down the whole
+                // region
+                m_log.ErrorFormat("[CLIENT]: Client thread for {0} {1} crashed.  Exception {2}", Name, AgentId, e);
             }
         }
 
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