//dnsproxyserconf.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:

* dnsproxyserconf.h - Dns Engine class

* @file

* @internalTechnology

*

*/

#ifndef __DNSPROXYSERVCONF_H__

#define __DNSPROXYSERVCONF_H__

#include <in_sock.h>

#include <commdbconnpref.h>

#include <e32cmn.h>

#include <es_enum_internal.h>

#include "es_enum.h"

//Forward declaration

class CDnsProxyEngine;

const TInt KDnsServerScopeGlobal 	= 0x0E;

const TInt KDnsServerListLen 		= 2;

const TInt KIpAddr 					= 80;

/**

*Defines an element in the DNS server list.This holds DNS server information

*TDnsServerInfo consists of DNS server address, scope, server id,

*and name

**/

class TDnsServerInfo 

	{

public:

	TInetAddr iAddr;			           //< DNS Server Address

	TInt iScope;				           //< The Sever Scope and type (MC/UC)

	TName iName;                           //< Name   

	TUint32 iIapId;                        //< Iapid for the interface on which DNS address is configured

	TConnectionInfoBuf iConnInfo;          //< Uplink connection info

	};

/**

* This class builds and maintains DNS server configuration. The configuration is then used by DNS query session

* class to forward incoming DNS requests to the external DNS server configured.

**/

class CDnsServerConfig:public CActive

	{

	public:

 	   ~CDnsServerConfig();

  	   static CDnsServerConfig* NewL(CDnsProxyEngine &aEngine);

 	   void BuildGlobalDnsServerListL(TUint32 aIapId);

  	   void NotifyInterfaceChange();

   	   TDnsServerInfo* GetDnsServerInfo(TInt aServerIndex);

  	   TInt GetServerCount() const;

  	   TBool GetConnectionStatus(TDnsServerInfo& aInfo);

 	private:

	    //construction

	 	CDnsServerConfig(CDnsProxyEngine &aEngine);

	    void ConstructL();

	    void AddDnsServerToListL(const TInetAddr &aAddr, RSocket &aSocket, TUint32 aIapId);

 	private:

 		void DoCancel();

 		void RunL();

 	public:

	    RSocketServ iSocketServer;

	    RConnection iConn;

	    TInterfaceNotificationBuf info;

	    RPointerArray<TDnsServerInfo> iServerList;//< Current list of servers

 	private:

 		RSocket 					iSocket;

	    TUint32                     iServerCount;

	    CDnsProxyEngine&            iProxyEngine;

	};

#endif /*__DNSPROXYSERVCONF_H__*/