//dnsproxydb.h

/*

* Copyright (c) 2008-2009 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:

* dnsproxydb.h - Dns Proxy db

* @file

* @internalTechnology

*

*/

#ifndef 	_DNSPROXY_DB_H__

#define 	_DNSPROXY_DB_H__

#include "in_sock.h"

#include "dns_hdr.h"

/**

 * This is singleton class and every time returns same instance. 

 * This class maintains the data's in rpointer array

 * @internalTechnology

 **/

class TDnsProxydbElement; 

class CDnsProxyEngine;

class CDnsProxyDb: public CBase

	{

	public:

	    //creats object and returns reference 

	    static CDnsProxyDb* CreateInstanceL(CDnsProxyEngine& aEngine);

	    //Destructor

	    ~CDnsProxyDb();

		//updates database

		void UpdateDbL(const TDesC8& aName,TInetAddr& aAddr);

		//adds record into database

		void AddRRecord(TDnsProxydbElement& aElementList,const TDesC8& aRRecord,TUint16 aDnsQType);

		//returns array of TDnsProxydbElement

		TDnsProxydbElement* GetRecordList(const TDesC8& aName);

		//cleans the rray

		void Cleanup();

		//returns size of db

		TInt GetDbSize();

		TDnsProxydbElement* FindIpAddress(TInetAddr& aAddr);

		void DeleteDbEntry(TInetAddr& aAddr);

	private:

		//compares qname with host name

		TBool CompareNames(const TDesC8& aHostName,const TDesC8& aQueryName);	

			//constructor

		CDnsProxyDb(CDnsProxyEngine& aEngine);

	private:

		static CDnsProxyDb* iDbObject;

		RPointerArray<TDnsProxydbElement> iElementList;

		RPointerArray<TDnsProxydbElement> iRecordElement;

		CDnsProxyEngine&				  iEngine;

	};

/*

This class maintains db list

*/	

class TDnsProxydbElement

	{

	public:	

		TBuf8<KDnsMaxName>		iHostName;

		TBuf8<KDnsMaxMessage>	iRecord;

		TInetAddr 				iHostAddr;

		TUint16 				iDnsQType;

	};

#endif/*_DNSPROXY_DB_H__*/