From ee6cd884c9732b492675e043fe318ffcdfecc45d Mon Sep 17 00:00:00 2001
From: "Justin Clark-Casey (justincc)" <jjustincc@googlemail.com>
Date: Tue, 13 Jul 2010 23:58:19 +0100
Subject: [PATCH] implement serverside checks for media texture navigation in
 order to stop naughty clients

---
 .../World/Media/Moap/MoapModule.cs            | 20 ++++++++++++------
 .../World/Permissions/PermissionsModule.cs    | 21 ++++++++++++++++++-
 .../Framework/Scenes/Scene.Permissions.cs     | 19 ++++++++++++++++-
 3 files changed, 52 insertions(+), 8 deletions(-)

diff --git a/OpenSim/Region/CoreModules/World/Media/Moap/MoapModule.cs b/OpenSim/Region/CoreModules/World/Media/Moap/MoapModule.cs
index d7aede91dd..09786ec096 100644
--- a/OpenSim/Region/CoreModules/World/Media/Moap/MoapModule.cs
+++ b/OpenSim/Region/CoreModules/World/Media/Moap/MoapModule.cs
@@ -245,12 +245,12 @@ namespace OpenSim.Region.CoreModules.Media.Moap
             
             m_log.DebugFormat("[MOAP]: Received {0} media entries for prim {1}", omu.FaceMedia.Length, primId);                        
                        
-            for (int i = 0; i < omu.FaceMedia.Length; i++)
-            {
-                MediaEntry me = omu.FaceMedia[i];
-                string v = (null == me ? "null": OSDParser.SerializeLLSDXmlString(me.GetOSD()));
-                m_log.DebugFormat("[MOAP]: Face {0} [{1}]", i, v);
-            }
+//            for (int i = 0; i < omu.FaceMedia.Length; i++)
+//            {
+//                MediaEntry me = omu.FaceMedia[i];
+//                string v = (null == me ? "null": OSDParser.SerializeLLSDXmlString(me.GetOSD()));
+//                m_log.DebugFormat("[MOAP]: Face {0} [{1}]", i, v);
+//            }
             
             if (omu.FaceMedia.Length > part.GetNumberOfSides())
             {
@@ -322,6 +322,14 @@ namespace OpenSim.Region.CoreModules.Media.Moap
                 return string.Empty;
             }  
             
+            UUID agentId = default(UUID);
+            
+            lock (m_omuCapUsers)
+                agentId = m_omuCapUsers[path];         
+            
+            if (!m_scene.Permissions.CanInteractWithPrimMedia(agentId, part.UUID, omn.Face))
+                return string.Empty;
+            
             m_log.DebugFormat(
                 "[MOAP]: Updating media entry for face {0} on prim {1} {2} to {3}", 
                 omn.Face, part.Name, part.UUID, omn.URL);
diff --git a/OpenSim/Region/CoreModules/World/Permissions/PermissionsModule.cs b/OpenSim/Region/CoreModules/World/Permissions/PermissionsModule.cs
index 2344e9681f..3a690afc73 100644
--- a/OpenSim/Region/CoreModules/World/Permissions/PermissionsModule.cs
+++ b/OpenSim/Region/CoreModules/World/Permissions/PermissionsModule.cs
@@ -251,6 +251,7 @@ namespace OpenSim.Region.CoreModules.World.Permissions
             m_scene.Permissions.OnTeleport += CanTeleport; //NOT YET IMPLEMENTED
             
             m_scene.Permissions.OnControlPrimMedia += CanControlPrimMedia;
+            m_scene.Permissions.OnInteractWithPrimMedia += CanInteractWithPrimMedia;
 
             m_scene.AddCommand(this, "bypass permissions",
                     "bypass permissions <true / false>",
@@ -1915,7 +1916,25 @@ namespace OpenSim.Region.CoreModules.World.Permissions
                 return true;
             
             return GenericPrimMediaPermission(part, agentID, me.ControlPermissions);
-        }
+        }  
+        
+        private bool CanInteractWithPrimMedia(UUID agentID, UUID primID, int face)
+        {
+            if (null == m_moapModule)
+                return false;
+            
+            SceneObjectPart part = m_scene.GetSceneObjectPart(primID);
+            if (null == part)
+                return false;
+            
+            MediaEntry me = m_moapModule.GetMediaEntry(part, face);
+            
+            // If there is no existing media entry then it can be controlled (in this context, created).
+            if (null == me)
+                return true;
+            
+            return GenericPrimMediaPermission(part, agentID, me.InteractPermissions);
+        }          
         
         private bool GenericPrimMediaPermission(SceneObjectPart part, UUID agentID, MediaPermission perms)
         {
diff --git a/OpenSim/Region/Framework/Scenes/Scene.Permissions.cs b/OpenSim/Region/Framework/Scenes/Scene.Permissions.cs
index 70af978719..003390047f 100644
--- a/OpenSim/Region/Framework/Scenes/Scene.Permissions.cs
+++ b/OpenSim/Region/Framework/Scenes/Scene.Permissions.cs
@@ -82,6 +82,7 @@ namespace OpenSim.Region.Framework.Scenes
     public delegate bool DeleteUserInventoryHandler(UUID itemID, UUID userID);
     public delegate bool TeleportHandler(UUID userID, Scene scene);
     public delegate bool ControlPrimMediaHandler(UUID userID, UUID primID, int face);
+    public delegate bool InteractWithPrimMediaHandler(UUID userID, UUID primID, int face);
     #endregion
 
     public class ScenePermissions
@@ -141,6 +142,7 @@ namespace OpenSim.Region.Framework.Scenes
         public event DeleteUserInventoryHandler OnDeleteUserInventory;
         public event TeleportHandler OnTeleport;
         public event ControlPrimMediaHandler OnControlPrimMedia;
+        public event InteractWithPrimMediaHandler OnInteractWithPrimMedia;
         #endregion
 
         #region Object Permission Checks
@@ -963,6 +965,21 @@ namespace OpenSim.Region.Framework.Scenes
                 }
             }
             return true;
-        }      
+        } 
+        
+        public bool CanInteractWithPrimMedia(UUID userID, UUID primID, int face)
+        {
+            InteractWithPrimMediaHandler handler = OnInteractWithPrimMedia;
+            if (handler != null)
+            {
+                Delegate[] list = handler.GetInvocationList();
+                foreach (InteractWithPrimMediaHandler h in list)
+                {
+                    if (h(userID, primID, face) == false)
+                        return false;
+                }
+            }
+            return true;
+        }    
     }
 }
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