2 files changed, 45 insertions, 6 deletions

diff --git a/OpenSim/Region/Framework/Scenes/Scene.cs b/OpenSim/Region/Framework/Scenes/Scene.cs
index d4ef3d9..da8a1b8 100644
--- a/OpenSim/Region/Framework/Scenes/Scene.cs
+++ b/OpenSim/Region/Framework/Scenes/Scene.cs
@@ -4221,6 +4221,20 @@ namespace OpenSim.Region.Framework.Scenes
                 }
 
                 childAgentUpdate.ChildAgentDataUpdate(cAgentData);
+
+                int ntimes = 20;
+                if (cAgentData.SenderWantsToWaitForRoot)
+                {
+                    while (childAgentUpdate.IsChildAgent && ntimes-- > 0)
+                        Thread.Sleep(500);
+
+                    m_log.DebugFormat(
+                        "[SCENE PRESENCE]: Found presence {0} {1} {2} in {3} after {4} waits",
+                        childAgentUpdate.Name, childAgentUpdate.UUID, childAgentUpdate.IsChildAgent ? "child" : "root", RegionInfo.RegionName, 20 - ntimes);
+
+                    if (childAgentUpdate.IsChildAgent)
+                        return false;
+                }
                 return true;
             }
             return false;
@@ -4278,10 +4292,6 @@ namespace OpenSim.Region.Framework.Scenes
                 m_log.WarnFormat(
                     "[SCENE PRESENCE]: Did not find presence with id {0} in {1} before timeout",
                     agentID, RegionInfo.RegionName);
-//            else
-//                m_log.DebugFormat(
-//                    "[SCENE PRESENCE]: Found presence {0} {1} {2} in {3} after {4} waits",
-//                    sp.Name, sp.UUID, sp.IsChildAgent ? "child" : "root", RegionInfo.RegionName, 10 - ntimes);
 
             return sp;
         }
diff --git a/OpenSim/Region/Framework/Scenes/ScenePresence.cs b/OpenSim/Region/Framework/Scenes/ScenePresence.cs
index 6433878..891e04e 100644
--- a/OpenSim/Region/Framework/Scenes/ScenePresence.cs
+++ b/OpenSim/Region/Framework/Scenes/ScenePresence.cs
@@ -29,7 +29,9 @@ using System;
 using System.Xml;
 using System.Collections.Generic;
 using System.Reflection;
+using System.Threading;
 using System.Timers;
+using Timer = System.Timers.Timer;
 using OpenMetaverse;
 using log4net;
 using Nini.Config;
@@ -1311,6 +1313,26 @@ namespace OpenSim.Region.Framework.Scenes
                 PhysicsActor.Size = new Vector3(0.45f, 0.6f, height);
         }
 
+        private bool WaitForUpdateAgent(IClientAPI client)
+        {
+            // Before UpdateAgent, m_originRegionID is UUID.Zero; after, it's non-Zero
+            int count = 20;
+            while (m_originRegionID.Equals(UUID.Zero) && count-- > 0)
+            {
+                m_log.DebugFormat("[SCENE PRESENCE]: Agent {0} waiting for update in {1}", client.Name, Scene.RegionInfo.RegionName);
+                Thread.Sleep(200);
+            }
+
+            if (m_originRegionID.Equals(UUID.Zero))
+            {
+                // Movement into region will fail
+                m_log.WarnFormat("[SCENE PRESENCE]: Update agent {0} never arrived", client.Name);
+                return false;
+            }
+
+            return true;
+        }
+
         /// <summary>
         /// Complete Avatar's movement into the region.
         /// </summary>
@@ -1328,6 +1350,12 @@ namespace OpenSim.Region.Framework.Scenes
                 "[SCENE PRESENCE]: Completing movement of {0} into region {1} in position {2}",
                 client.Name, Scene.RegionInfo.RegionName, AbsolutePosition);
 
+            if (m_teleportFlags != TeleportFlags.ViaLogin)
+                // Let's wait until UpdateAgent (called by departing region) is done
+                if (!WaitForUpdateAgent(client))
+                    // The sending region never sent the UpdateAgent data, we have to refuse
+                    return;
+
             Vector3 look = Velocity;
 
             if ((look.X == 0) && (look.Y == 0) && (look.Z == 0))
@@ -1348,10 +1376,11 @@ namespace OpenSim.Region.Framework.Scenes
 
             bool flying = ((m_AgentControlFlags & AgentManager.ControlFlags.AGENT_CONTROL_FLY) != 0);
             MakeRootAgent(AbsolutePosition, flying);
+
+            // Tell the client that we're totally ready
             ControllingClient.MoveAgentIntoRegion(m_scene.RegionInfo, AbsolutePosition, look);
+
             // Remember in HandleUseCircuitCode, we delayed this to here
-            // This will also send the initial data to clients when TP to a neighboring region. 
-            // Not ideal, but until we know we're TP-ing from a neighboring region, there's not much we can do
             if (m_teleportFlags > 0)
                 SendInitialDataToMe();