* Added a Basic DOS protection container/base object for the most common HTTP Server handlers. XMLRPC Handler, GenericHttpHandler and <Various>StreamHandler

* Applied the XmlRpcBasicDOSProtector.cs to the login service as both an example, and good practice.
* Applied the BaseStreamHandlerBasicDOSProtector.cs to the friends service as an example of the DOS Protector on StreamHandlers
* Added CircularBuffer, used for CPU and Memory friendly rate monitoring.
* DosProtector has 2 states, 1. Just Check for blocked users and check general velocity, 2. Track velocity per user,     It only jumps to 2 if it's getting a lot of requests, and state 1 is about as resource friendly as if it wasn't even there.

1 files changed, 11 insertions, 0 deletions

diff --git a/OpenSim/Server/Handlers/Login/LLLoginHandlers.cs b/OpenSim/Server/Handlers/Login/LLLoginHandlers.cs
index e4a0ffa..f2a5678 100644
--- a/OpenSim/Server/Handlers/Login/LLLoginHandlers.cs
+++ b/OpenSim/Server/Handlers/Login/LLLoginHandlers.cs
@@ -145,6 +145,17 @@ namespace OpenSim.Server.Handlers.Login
             return FailedXMLRPCResponse();
 
         }
+        public XmlRpcResponse HandleXMLRPCLoginBlocked(XmlRpcRequest request, IPEndPoint client)
+        {
+            XmlRpcResponse response = new XmlRpcResponse();
+            Hashtable resp = new Hashtable();
+
+            resp["reason"] = "presence";
+            resp["message"] = "Logins are currently restricted. Please try again later.";
+            resp["login"] = "false";
+            response.Value = resp;
+            return response;
+        }
 
         public XmlRpcResponse HandleXMLRPCSetLoginLevel(XmlRpcRequest request, IPEndPoint remoteClient)
         {