From: Christopher Yeoh <cyeoh@au1.ibm.com>

This patch makes llAllowInventoryDrop work with the permissions module
enabled. Changes include:

- Enabled PropagatePermissions when permissions module serverside perms
  is on

- change ownership of item when item is dropped into an object.
  Ownership changes to the owner of the object the item is dropped into

- propagation of permissions if the permissions module enabled (eg
  next-owner mask applied)

- CHANGED_ALLOWED_DROP is now passed to the change script event if an
  item was allowed to be dropped into the object only because
  llAllowInventoryDrop is enabled (instead of CHANGED_INVENTORY being
  passed).

- Sets object flags correctly when llAllowInventoryDrop is called so
  clients are notified immediately of the change in state. Am not
  sure that calling aggregateScriptEvents is the right way to do it,
  but it works and seems to be the only way without making further
  changes to update LocalFlags

3 files changed, 51 insertions, 20 deletions

diff --git a/OpenSim/Region/Environment/Scenes/Scene.Inventory.cs b/OpenSim/Region/Environment/Scenes/Scene.Inventory.cs
index 12095e5..590bea0 100644
--- a/OpenSim/Region/Environment/Scenes/Scene.Inventory.cs
+++ b/OpenSim/Region/Environment/Scenes/Scene.Inventory.cs
@@ -1179,7 +1179,8 @@ namespace OpenSim.Region.Environment.Scenes
             destTaskItem.InvType = srcTaskItem.InvType;
             destTaskItem.Type = srcTaskItem.Type;
 
-            destPart.AddInventoryItem(destTaskItem);
+            destPart.AddInventoryItem(destTaskItem, part.OwnerID!=destPart.OwnerID
+                                      && ExternalChecks.ExternalChecksPropagatePermissions());
 
             if ((srcTaskItem.CurrentPermissions & (uint)PermissionMask.Copy) == 0)
                 part.RemoveInventoryItem(itemId);
@@ -1249,10 +1250,15 @@ namespace OpenSim.Region.Environment.Scenes
 
             if (part != null)
             {
-                if (!ExternalChecks.ExternalChecksCanEditObjectInventory(part.UUID, remoteClient.AgentId))
-                    return;
-
                 TaskInventoryItem currentItem = part.GetInventoryItem(itemID);
+                bool allowInventoryDrop = (part.GetEffectiveObjectFlags()
+                                           & (uint)PrimFlags.AllowInventoryDrop) != 0;
+                // Explicity allow anyone to add to the inventory if the AllowInventoryDrop
+                // flag has been set. Don't however let them update an item unless
+                // they pass the external checks
+                if (!ExternalChecks.ExternalChecksCanEditObjectInventory(part.UUID, remoteClient.AgentId)
+                    && (currentItem != null || !allowInventoryDrop ))
+                    return;
 
                 if (currentItem == null)
                 {
@@ -1417,7 +1423,7 @@ namespace OpenSim.Region.Environment.Scenes
                 taskItem.PermsMask = 0;
                 taskItem.AssetID = asset.FullID;
 
-                part.AddInventoryItem(taskItem);
+                part.AddInventoryItem(taskItem, false);
                 part.GetProperties(remoteClient);
 
                 part.CreateScriptInstance(taskItem, 0, false, DefaultScriptEngine, 0);
@@ -1512,7 +1518,7 @@ namespace OpenSim.Region.Environment.Scenes
             destTaskItem.InvType = srcTaskItem.InvType;
             destTaskItem.Type = srcTaskItem.Type;
 
-            destPart.AddInventoryItemExclusive(destTaskItem);
+            destPart.AddInventoryItemExclusive(destTaskItem, false);
 
             if (running > 0)
             {
diff --git a/OpenSim/Region/Environment/Scenes/SceneObjectGroup.Inventory.cs b/OpenSim/Region/Environment/Scenes/SceneObjectGroup.Inventory.cs
index bfa9763..8275ceb 100644
--- a/OpenSim/Region/Environment/Scenes/SceneObjectGroup.Inventory.cs
+++ b/OpenSim/Region/Environment/Scenes/SceneObjectGroup.Inventory.cs
@@ -151,23 +151,42 @@ namespace OpenSim.Region.Environment.Scenes
                 taskItem.AssetID = item.AssetID;
                 taskItem.Name = item.Name;
                 taskItem.Description = item.Description;
-                taskItem.OwnerID = item.Owner;
+                taskItem.OwnerID = part.OwnerID; // Transfer ownership
                 taskItem.CreatorID = item.Creator;
                 taskItem.Type = item.AssetType;
                 taskItem.InvType = item.InvType;
 
-                taskItem.BasePermissions = item.BasePermissions;
-                taskItem.CurrentPermissions = item.CurrentPermissions;
-                // FIXME: ignoring group permissions for now as they aren't stored in item
-                taskItem.EveryonePermissions = item.EveryOnePermissions;
-                taskItem.NextPermissions = item.NextPermissions;
+                if (remoteClient!=null && remoteClient.AgentId!=part.OwnerID &&
+                    m_scene.ExternalChecks.ExternalChecksPropagatePermissions()) {
+                    taskItem.BasePermissions = item.BasePermissions & item.NextPermissions;
+                    taskItem.CurrentPermissions = item.CurrentPermissions & item.NextPermissions;
+                    taskItem.EveryonePermissions = item.EveryOnePermissions & item.NextPermissions;
+                    taskItem.NextPermissions = item.NextPermissions;
+                    taskItem.CurrentPermissions |= 8;
+                } else {
+                    taskItem.BasePermissions = item.BasePermissions;
+                    taskItem.CurrentPermissions = item.CurrentPermissions;
+                    taskItem.CurrentPermissions |= 8;
+                    taskItem.EveryonePermissions = item.EveryOnePermissions;
+                    taskItem.NextPermissions = item.NextPermissions;
+                }
+
+                        
+
                 taskItem.Flags = item.Flags;
                 // TODO: These are pending addition of those fields to TaskInventoryItem
 //                taskItem.SalePrice = item.SalePrice;
 //                taskItem.SaleType = item.SaleType;
                 taskItem.CreationDate = (uint)item.CreationDate;
-
-                part.AddInventoryItem(taskItem);
+                
+                bool addFromAllowedDrop = false;
+                if (remoteClient!=null) 
+                {
+                    addFromAllowedDrop = remoteClient.AgentId!=part.OwnerID &&
+                        m_scene.ExternalChecks.ExternalChecksPropagatePermissions();
+                }
+
+                part.AddInventoryItem(taskItem, addFromAllowedDrop);
 
                 return true;
             }
diff --git a/OpenSim/Region/Environment/Scenes/SceneObjectPart.Inventory.cs b/OpenSim/Region/Environment/Scenes/SceneObjectPart.Inventory.cs
index 501f199..fa66515 100644
--- a/OpenSim/Region/Environment/Scenes/SceneObjectPart.Inventory.cs
+++ b/OpenSim/Region/Environment/Scenes/SceneObjectPart.Inventory.cs
@@ -289,16 +289,16 @@ namespace OpenSim.Region.Environment.Scenes
         /// name is chosen.
         /// </summary>
         /// <param name="item"></param>
-        public void AddInventoryItem(TaskInventoryItem item)
+        public void AddInventoryItem(TaskInventoryItem item, bool allowedDrop)
         {
-            AddInventoryItem(item.Name, item);
+            AddInventoryItem(item.Name, item, allowedDrop);
         }
 
         /// <summary>
         /// Add an item to this prim's inventory.  If an item with the same name already exists, it is replaced.
         /// </summary>
         /// <param name="item"></param>
-        public void AddInventoryItemExclusive(TaskInventoryItem item)
+        public void AddInventoryItemExclusive(TaskInventoryItem item, bool allowedDrop)
         {
             List<TaskInventoryItem> il = new List<TaskInventoryItem>(m_taskInventory.Values);
             foreach (TaskInventoryItem i in il)
@@ -313,7 +313,7 @@ namespace OpenSim.Region.Environment.Scenes
                 }
             }
 
-            AddInventoryItem(item.Name, item);
+            AddInventoryItem(item.Name, item, allowedDrop);
         }
 
         /// <summary>
@@ -324,7 +324,10 @@ namespace OpenSim.Region.Environment.Scenes
         /// The item itself.  The name within this structure is ignored in favour of the name
         /// given in this method's arguments
         /// </param>
-        protected void AddInventoryItem(string name, TaskInventoryItem item)
+        /// <param name="allowedDrop">
+        //  Item was only added to inventory because AllowedDrop is set
+        /// </param>
+        protected void AddInventoryItem(string name, TaskInventoryItem item, bool allowedDrop)
         {
             name = FindAvailableInventoryName(name);
             if (name == String.Empty)
@@ -337,7 +340,10 @@ namespace OpenSim.Region.Environment.Scenes
             lock (m_taskInventory)
             {
                 m_taskInventory.Add(item.ItemID, item);
-                TriggerScriptChangedEvent(Changed.INVENTORY);
+                if (allowedDrop) 
+                    TriggerScriptChangedEvent(Changed.ALLOWED_DROP);
+                else
+                    TriggerScriptChangedEvent(Changed.INVENTORY);
             }
 
             m_inventorySerial++;