/*

* Copyright (c) 2010 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: 

*

*/

#ifndef CMDNSPROBEMANAGER_H_

#define CMDNSPROBEMANAGER_H_

#include <e32base.h>

#include <in_sock.h>

class CMDNSProbeManager : public CTimer

	{	

	public:

	/*Conflict can happen in 2 cases , 

	 * Case 1: When the Address Record (Type A) is inconsistent, i.e., same

	 * host name for different Ip addresses

	 * Case 2: When the Service Record (Type SRV), is conflicting, two hosts try to

	 * acquire the same service name with the same service type., and same 

	/*Case 1:To get Unique Host Name ; to handle Host name conflict, 

	 * we need the acquired host name & IPAddress*/

	static CMDNSProbeManager* NewL(RBuf& aHostName, TInetAddr aAddr);

	static CMDNSProbeManager* NewLC(RBuf& aHostName, TInetAddr aAddr);

	/*To get Unique Service Name; to handle service name conflict, 

	 * we need acquired service name & host name*/

	static CMDNSProbeManager* NewL(RBuf& aServiceName,RBuf& aHostName);

	static CMDNSProbeManager* NewLC(RBuf& aServiceName,RBuf& aHostName);

	~CMDNSProbeManager();

	private:

	void RunL();

	TInt RunError(TInt aError);

	private:

	TBool CheckForUniqueness();

	void DefensiveResponseReceived();//Get a unique name (DNS Label)

	void SendProbeL(); //Probe for Unique name , Create Probe and Send 

	void SendAnnouncementL();//Send out Gratitous mDNS Announcement , Create Announcement and Send

	void Schedule(); //Self-Complete, To be called when moved to Probe State.

	void Delay(TUint32 aDelayTime/*In Milliseconds*/); //To introduce Delay between Probes.	

	CMDNSProbeManager (RBuf& aHostName, TInetAddr aAddr);

	CMDNSProbeManager (RBuf& aServiceName,RBuf& aHostName);

	void ConstructL();

	private:

	enum TProbeStates

	{

	EIdle,

	EProbeBegin,

	EProbeFirstUnicast,

	EProbeSecondUnicast,

	EProbeMulticast,

	EProbeComplete,

	EFirstAnnouncement,//First gratuitous mDNS announcement

	ESecondAnnouncement//Second gratuitous mDNS announcement

	};

	TInetAddr iAddr;

	TProbeStates iCurrentProbeState;

	//MDNSCacheInterface* iCache;

	};

#endif /*CMDNSPROBEMANAGER_H_*/