Mantis#1965. Thank you kindly, HomerHorwitz for a patch that:

Places touched:
- Added two events for in-packets to LLCLientView: RegionHandleRequest and
  ParcelInfoRequest
- Added sending of two out-packets to LLCLientView: RegionIDAndHandleReply and
  ParcelInfoReply.
- Scene handles the RegionHandleRequest, LandManagementModule the
  ParcelInfoRequest
- Added inter-region request for LandData by RegionHandle and local position.
  This was implemented as XML-RPC request. The returned LandData isn't
  complete, it only contains the data necessary for answering the
  ParcelInfoRequest
- Added new CAPS (0009) for RemoteParcelRequest and some methods for LandData
  handling to LandManagementModule
- Added methods for fake parcelID creation and parsing to Util
- Fixed missing implementation of interface methods.
- Added new file:
    OpenSim/Framework/Communications/Capabilities/LLSDRemoteParcelResponse.cs
  NOTE: This is part of the patch, too.
Due to the many places touched, I would consider this patch as experimental.

1 files changed, 19 insertions, 0 deletions

diff --git a/OpenSim/Framework/Util.cs b/OpenSim/Framework/Util.cs
index d72e03e..bc35fa6 100644
--- a/OpenSim/Framework/Util.cs
+++ b/OpenSim/Framework/Util.cs
@@ -716,5 +716,24 @@ namespace OpenSim.Framework
             XmlRpcRequest client = new XmlRpcRequest(methodName, args);
             return client.Send(url, 6000);
         }
+        
+        // used for RemoteParcelRequest (for "About Landmark")
+        public static LLUUID BuildFakeParcelID(ulong regionHandle, uint x, uint y) {
+            byte[] bytes = {
+                (byte)(regionHandle >> 56), (byte)(regionHandle >> 48), (byte)(regionHandle >> 40), (byte)(regionHandle >> 32),
+                (byte)(regionHandle >> 24), (byte)(regionHandle >> 16), (byte)(regionHandle >> 8), (byte)regionHandle,
+                (byte)(x >> 24), (byte)(x >> 16), (byte)(x >> 8), (byte)x,
+                (byte)(y >> 24), (byte)(y >> 16), (byte)(y >> 8), (byte)y };
+            return new LLUUID(bytes, 0);
+        }
+        
+        public static void ParseFakeParcelID(LLUUID parcelID, out ulong regionHandle, out uint x, out uint y) {
+            byte[] bytes = parcelID.GetBytes();
+            regionHandle = Helpers.BytesToUInt64(bytes);
+            x = Helpers.BytesToUInt(bytes, 8);
+            // grrr. I'd like to use that code in the next line, but libsl has an off-by-one bug here and returns 0.
+            //uint y = Helpers.BytesToUInt(bytes, 12);
+            y = (uint)((bytes[12] << 24) | (bytes[13] << 16) | (bytes[14] << 8) | bytes[15]);
+        }
     }
 }