* Output XmlRpc error message if user server gets a fault response from the region server on login

* This will make it more obvious if one accidentally starts one's region server in standalone rather than grid mode but then tries to login to a grid (as I am wont to do)
* We are now sending back a fault code (-32601) if no xmlrpc method is found rather than an ordinary message

OpenSim/Framework/Servers/BaseHttpServer.cs

@@ -230,6 +230,13 @@ namespace OpenSim.Framework.Servers
                 return true;
             }
         }
+        
+        /// <summary>
+        /// Try all the registered xmlrpc handlers when an xmlrpc request is received.
+        /// Sends back an XMLRPC unknown request response if no handler is registered for the requested method.
+        /// </summary>
+        /// <param name="request"></param>
+        /// <param name="response"></param>
         private void HandleXmlRpcRequests(HttpListenerRequest request, HttpListenerResponse response)
         {
             Stream requestStream = request.InputStream;
@@ -268,12 +275,8 @@ namespace OpenSim.Framework.Servers
                     else
                     {
                         xmlRpcResponse = new XmlRpcResponse();
-                        Hashtable unknownMethodError = new Hashtable();
+                        // Code set in accordance with http://xmlrpc-epi.sourceforge.net/specs/rfc.fault_codes.php
-                        unknownMethodError["reason"] = "XmlRequest";
+                        xmlRpcResponse.SetFault(-32601, String.Format("Requested method [{0}] not found", methodName));
-                        ;
-                        unknownMethodError["message"] = "Unknown Rpc Request [" + methodName + "]";
-                        unknownMethodError["login"] = "false";
-                        xmlRpcResponse.Value = unknownMethodError;
                     }
 
                     responseString = XmlRpcResponseSerializer.Singleton.Serialize(xmlRpcResponse);

OpenSim/Grid/UserServer/UserLoginService.cs

@@ -130,12 +130,19 @@ namespace OpenSim.Grid.UserServer
                 theUser.currentAgent.currentRegion = SimInfo.UUID;
                 theUser.currentAgent.currentHandle = SimInfo.regionHandle;
 
-                m_log.Info("[LOGIN]: Sending expect user call to "
+                m_log.Info("[LOGIN]: Telling "
                            + SimInfo.regionName + " @ " + SimInfo.httpServerURI + "  " +
-                           SimInfo.regionLocX + "," + SimInfo.regionLocY);
+                           SimInfo.regionLocX + "," + SimInfo.regionLocY + " to expect user connection");
 
                 XmlRpcRequest GridReq = new XmlRpcRequest("expect_user", SendParams);                
                 XmlRpcResponse GridResp = GridReq.Send(SimInfo.httpServerURI, 6000);
+                
+                if (GridResp.IsFault)
+                {
+                    m_log.ErrorFormat(
+                        "[LOGIN]: XMLRPC request for {0} failed, fault code: {1}, reason: {2}", 
+                        SimInfo.httpServerURI, GridResp.FaultCode, GridResp.FaultString);
+                }                
             }
             catch (Exception)
             {

OpenSim/Region/Communications/OGS1/OGS1GridServices.cs

@@ -450,7 +450,9 @@ namespace OpenSim.Region.Communications.OGS1
 
         // Grid Request Processing
         /// <summary>
-        /// 
+        /// Received from the user server when a user starts logging in.  This call allows
+        /// the region to prepare for direct communication from the client.  Sends back an empty
+        /// xmlrpc response on completion.
         /// </summary>
         /// <param name="request"></param>
         /// <returns></returns>