--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/tcpiputils/dnd/inc/resolver.h	Tue Jan 26 15:23:49 2010 +0200
@@ -0,0 +1,72 @@
+// Copyright (c) 2004-2009 Nokia Corporation and/or its subsidiary(-ies).
+// All rights reserved.
+// This component and the accompanying materials are made available
+// under the terms of "Eclipse Public License v1.0"
+// which accompanies this distribution, and is available
+// at the URL "http://www.eclipse.org/legal/epl-v10.html".
+//
+// Initial Contributors:
+// Nokia Corporation - initial contribution.
+//
+// Contributors:
+//
+// Description:
+// resolver.h - name resolver
+//
+
+#ifndef __RESOLVER_H__
+#define __RESOLVER_H__
+
+/**
+@file resolver.h
+Resolver for a query from single client
+@internalComponent	Domain Name Resolver
+*/
+
+#include <es_sock.h>
+
+class CDndListener;
+class CDndEngine;
+class MDnsSource;
+
+/**
+// Name resolver side of the RHostResolver
+//
+// When application opens the RHostResolver, a connection through TCP/IP stack
+// is created, using a chain of intermediate objects and a socket. A class
+// implementing from a MDndResolver is the other end of the "chain":
+//
+//   RHostResolver <--- .... ---> MDndResolver
+//
+// There is a limited pool of MDndResolvers, which are reused for new
+// different RHostResolver clients.
+//
+// It has the following simplified state diagram:
+//
+@verbatim
+                   __________________
+                 /      reuse        \
+                V                     |
+ construct -> Start() --> [work] --> Stop() --> destruct
+@endverbatim
+*/
+class MDndResolver
+	{
+public:
+	// Create a new instance of a resolver
+	static MDndResolver *New(const TInt aId, CDndEngine &aControl, MDndListener &aListener, MDnsSource &aDnsclient);
+	// Start serving a request
+	virtual void Start(const TDnsMessageBuf &aMsg) = 0;
+	// Stop processing of the current request
+	virtual void Stop() = 0;
+	// @return The session id of the current request (or 0, if none)
+	virtual TUint16 Session() const = 0;
+	// @return reference to the time of the last request
+	virtual const TTime &RequestTime() const = 0;
+	// @return reference to the current reply message
+	virtual const TDesC8 &ReplyMessage() = 0;
+	// Allow delete via M-class pointer
+	virtual ~MDndResolver() {};
+	};
+
+#endif