implement prim media control permissions serverside in order to stop bad clients

2 files changed, 108 insertions, 22 deletions

diff --git a/OpenSim/Region/CoreModules/World/Media/Moap/MoapModule.cs b/OpenSim/Region/CoreModules/World/Media/Moap/MoapModule.cs
index 378ff4a..d7aede9 100644
--- a/OpenSim/Region/CoreModules/World/Media/Moap/MoapModule.cs
+++ b/OpenSim/Region/CoreModules/World/Media/Moap/MoapModule.cs
@@ -58,8 +58,21 @@ namespace OpenSim.Region.CoreModules.Media.Moap
         public string Name { get { return "MoapModule"; } }                
         public Type ReplaceableInterface { get { return null; } }        
         
+        /// <summary>
+        /// The scene to which this module is attached
+        /// </summary>
         protected Scene m_scene;
         
+        /// <summary>
+        /// Track the ObjectMedia capabilities given to users
+        /// </summary>
+        protected Dictionary<string, UUID> m_omCapUsers = new Dictionary<string, UUID>();
+        
+        /// <summary>
+        /// Track the ObjectMediaUpdate capabilities given to users
+        /// </summary>        
+        protected Dictionary<string, UUID> m_omuCapUsers = new Dictionary<string, UUID>();
+        
         public void Initialise(IConfigSource config) 
         {
             // TODO: Add config switches to enable/disable this module
@@ -87,16 +100,27 @@ namespace OpenSim.Region.CoreModules.Media.Moap
             m_log.DebugFormat(
                 "[MOAP]: Registering ObjectMedia and ObjectMediaNavigate capabilities for agent {0}", agentID);
             
-            // We do receive a post to ObjectMedia when a new avatar enters the region - though admittedly this is the
-            // avatar that set the texture in the first place.
-            // Even though we're registering for POST we're going to get GETS and UPDATES too
-            caps.RegisterHandler(
-                "ObjectMedia", new RestStreamHandler("POST", "/CAPS/" + UUID.Random(), HandleObjectMediaMessage));
+            string omCapUrl = "/CAPS/" + UUID.Random();
+            
+            lock (m_omCapUsers)
+            {
+                m_omCapUsers[omCapUrl] = agentID;
+                
+                // Even though we're registering for POST we're going to get GETS and UPDATES too
+                caps.RegisterHandler(
+                    "ObjectMedia", new RestStreamHandler("POST", omCapUrl, HandleObjectMediaMessage));
+            }
+            
+            string omuCapUrl = "/CAPS/" + UUID.Random();
             
-            // We do get these posts when the url has been changed.
-            // Even though we're registering for POST we're going to get GETS and UPDATES too
-            caps.RegisterHandler(
-                "ObjectMediaNavigate", new RestStreamHandler("POST", "/CAPS/" + UUID.Random(), HandleObjectMediaNavigateMessage));
+            lock (m_omuCapUsers)
+            {
+                m_omuCapUsers[omuCapUrl] = agentID;
+                
+                // Even though we're registering for POST we're going to get GETS and UPDATES too
+                caps.RegisterHandler(
+                    "ObjectMediaNavigate", new RestStreamHandler("POST", omuCapUrl, HandleObjectMediaNavigateMessage));
+            }
         }      
         
         public MediaEntry GetMediaEntry(SceneObjectPart part, int face)
@@ -147,7 +171,7 @@ namespace OpenSim.Region.CoreModules.Media.Moap
         protected string HandleObjectMediaMessage(
             string request, string path, string param, OSHttpRequest httpRequest, OSHttpResponse httpResponse)
         {            
-            m_log.DebugFormat("[MOAP]: Got ObjectMedia raw request [{0}]", request);
+            m_log.DebugFormat("[MOAP]: Got ObjectMedia path [{0}], raw request [{1}]", path, request);
          
             OSDMap osd = (OSDMap)OSDParser.DeserializeLLSDXml(request);
             ObjectMediaMessage omm = new ObjectMediaMessage();
@@ -156,7 +180,7 @@ namespace OpenSim.Region.CoreModules.Media.Moap
             if (omm.Request is ObjectMediaRequest)
                 return HandleObjectMediaRequest(omm.Request as ObjectMediaRequest);
             else if (omm.Request is ObjectMediaUpdate)
-                return HandleObjectMediaUpdate(omm.Request as ObjectMediaUpdate);               
+                return HandleObjectMediaUpdate(path, omm.Request as ObjectMediaUpdate);               
 
             throw new Exception(
                 string.Format(
@@ -165,7 +189,7 @@ namespace OpenSim.Region.CoreModules.Media.Moap
         }
         
         /// <summary>
-        /// Handle a request for media textures
+        /// Handle a fetch request for media textures
         /// </summary>
         /// <param name="omr"></param>
         /// <returns></returns>
@@ -202,9 +226,10 @@ namespace OpenSim.Region.CoreModules.Media.Moap
         /// <summary>
         /// Handle an update of media textures.
         /// </summary>
+        /// <param name="path">Path on which this request was made</param>
         /// <param name="omu">/param>
         /// <returns></returns>
-        protected string HandleObjectMediaUpdate(ObjectMediaUpdate omu)      
+        protected string HandleObjectMediaUpdate(string path, ObjectMediaUpdate omu)      
         {
             UUID primId = omu.PrimID;
             
@@ -216,16 +241,16 @@ namespace OpenSim.Region.CoreModules.Media.Moap
                     "[MOAP]: Received an UPDATE ObjectMediaRequest for prim {0} but this doesn't exist in region {1}", 
                     primId, m_scene.RegionInfo.RegionName);
                 return string.Empty;
-            }            
+            }                                    
             
             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())
             {
@@ -235,7 +260,27 @@ namespace OpenSim.Region.CoreModules.Media.Moap
                 return string.Empty;
             }
             
-            part.Shape.Media = new List<MediaEntry>(omu.FaceMedia);
+            List<MediaEntry> media = part.Shape.Media;
+            
+            if (null == media)
+            {
+                part.Shape.Media = new List<MediaEntry>(omu.FaceMedia);
+            }
+            else
+            {
+                // We need to go through the media textures one at a time to make sure that we have permission 
+                // to change them                    
+                UUID agentId = default(UUID);
+                
+                lock (m_omCapUsers)
+                    agentId = m_omCapUsers[path];                
+                
+                for (int i = 0; i < media.Count; i++)
+                {
+                    if (m_scene.Permissions.CanControlPrimMedia(agentId, part.UUID, i))
+                        media[i] = omu.FaceMedia[i];
+                }
+            }
             
             UpdateMediaUrl(part);                        
             
diff --git a/OpenSim/Region/CoreModules/World/Permissions/PermissionsModule.cs b/OpenSim/Region/CoreModules/World/Permissions/PermissionsModule.cs
index 69b247c..358ea59 100644
--- a/OpenSim/Region/CoreModules/World/Permissions/PermissionsModule.cs
+++ b/OpenSim/Region/CoreModules/World/Permissions/PermissionsModule.cs
@@ -164,6 +164,7 @@ namespace OpenSim.Region.CoreModules.World.Permissions
         private Dictionary<string, bool> GrantYP = new Dictionary<string, bool>();
         private IFriendsModule m_friendsModule;
         private IGroupsModule m_groupsModule;
+        private IMoapModule m_moapModule;
 
         #endregion
 
@@ -248,6 +249,8 @@ namespace OpenSim.Region.CoreModules.World.Permissions
             m_scene.Permissions.OnDeleteUserInventory += CanDeleteUserInventory; //NOT YET IMPLEMENTED
             
             m_scene.Permissions.OnTeleport += CanTeleport; //NOT YET IMPLEMENTED
+            
+            m_scene.Permissions.OnControlPrimMedia += CanControlPrimMedia;
 
             m_scene.AddCommand(this, "bypass permissions",
                     "bypass permissions <true / false>",
@@ -393,6 +396,8 @@ namespace OpenSim.Region.CoreModules.World.Permissions
 
             if (m_groupsModule == null)
                 m_log.Warn("[PERMISSIONS]: Groups module not found, group permissions will not work");        
+            
+            m_moapModule = m_scene.RequestModuleInterface<IMoapModule>();
         }
 
         public void Close()
@@ -1893,5 +1898,41 @@ namespace OpenSim.Region.CoreModules.World.Permissions
             }
             return(false);
         }
+        
+        private bool CanControlPrimMedia(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;
+            
+            if (IsAdministrator(agentID))
+                return true;            
+            
+            if ((me.ControlPermissions & MediaPermission.Anyone) == MediaPermission.Anyone)
+                return true;
+
+            if ((me.ControlPermissions & MediaPermission.Owner) == MediaPermission.Owner)
+            {
+                if (agentID == part.OwnerID)
+                    return true;
+            }           
+            
+            if ((me.ControlPermissions & MediaPermission.Group) == MediaPermission.Group)
+            {
+                if (IsGroupMember(part.GroupID, agentID, 0))
+                    return true;
+            }                 
+            
+            return false;
+        }
     }
-}
+}
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