// Copyright (c) 2001-2009 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:

// Started by MWT, February 1998

// 

//

#if !defined (__TraceRtENG_H__)

#define __TraceRtENG_H__

#if !defined(__IN_SOCK_H__)

#include <in_sock.h>

#endif

class MTraceRtNotificationHandler

	{

public:

	virtual void Starting(const TNameRecord& aTo, TInt aTtl, TInt aDataLen)=0;

	virtual void Probe(TInt aTtl) = 0;

	virtual void Reply(TInt aNo, TInt aDelta, TUint aId) = 0;

	virtual void FromHost(const TNameRecord& aHost) = 0;

	virtual void Finished(TInt aError) =0;

	};

class TTraceRtOptions

	{

public:

	IMPORT_C TTraceRtOptions();

	TUint iMaxTtl;

	TBool iResolveAddress;

	TTimeIntervalMicroSeconds32 iWait;

	TUint iTos;

	THostName iDestname;

	TInt iNrProbes;

	TBool iPrompt;

	};

class CTraceRtTimer;

class CTraceRtSender;

class CTraceRtReceiver;

class HTraceRtHeader;

class CTraceRtEng : public CBase

	{

friend class CTraceRtTimer;

friend class CTraceRtSender;

friend class CTraceRtReceiver;

public:

	IMPORT_C static CTraceRtEng* NewL(MTraceRtNotificationHandler& aUi);

	IMPORT_C ~CTraceRtEng();

	IMPORT_C void SetPriorities(TInt aTimerPriority, TInt aSenderPriority, TInt aReceiverPriority);

	IMPORT_C void Start(const TTraceRtOptions& aOptions);

	IMPORT_C void Cancel();

	IMPORT_C void CancelAndFinished();

protected:

	IMPORT_C void ConstructL(MTraceRtNotificationHandler& aUi);

	IMPORT_C CTraceRtEng();

private:

	void TimerComplete();

	void SendComplete();

	void SendDoCancel();

	void RecvComplete();

	void RecvDoCancel();

	void NextSend();

	void ResolveReply();

	void DoError(TInt aError);

	enum TState { EStopped, ELookingUpHost, ESending, ELookingUpReply };

	TState iState;

	MTraceRtNotificationHandler* iUi;

	CTraceRtTimer *iTimer;

	CTraceRtSender *iSender;

	CTraceRtReceiver *iReceiver;

	TTraceRtOptions iOptions;

	RSocketServ iSocketServ;

	RSocket iIcmpSocket;

	RHostResolver iResolver;

	TNameEntry iNameEntry;

	TInetAddr iSrcAddr;

	TInetAddr iDstAddr;

	HTraceRtHeader *iRecvData;

	HTraceRtHeader *iSendData;

	TInt iProbeNr;

	TUint iTtl;

	TBool iGotThere;

	TInt iUnreachCount;

	TTime iSendTime;

	TUint iLastCode;

	RConnection iConnect;

	TBool iResolv;

	TInt iSeq;

	TInt iIdent;

	};

enum TTraceRtDefaultPriorites 

	{

	ETraceRtTimerPriority=10,

	ETraceRtSenderPriority=20,

	ETraceRtReceiverPriority=30,

	};

// ICMP Type and Code values

const TUint KTraceRtTypeEchoReply				= 0;

const TUint KTraceRtCodeEcho					= 0;

const TUint KTraceRtTypeEchoRequest				= 8;

const TUint KTraceRtTypeUnreachable				= 3;

const TUint	KTraceRtCodeUnreachNet				= 0;

const TUint	KTraceRtCodeUnreachHost				= 1;

const TUint	KTraceRtCodeUnreachProtocol			= 2;

const TUint	KTraceRtCodeUnreachPort				= 3;

const TUint	KTraceRtCodeUnreachNeedFrag			= 4;

const TUint	KTraceRtCodeUnreachSrcRouteFail		= 5;

const TUint	KTraceRtCodeUnreachNetUnknown		= 6;

const TUint	KTraceRtCodeUnreachHostUnknown		= 7;

const TUint	KTraceRtCodeUnreachSrcHostIsolated	= 8;	

const TUint	KTraceRtCodeUnreachNetProhibited	= 9;

const TUint	KTraceRtCodeUnreachHostProhibited	= 10;

const TUint	KTraceRtCodeUnreachNetTOS			= 11;

const TUint	KTraceRtCodeUnreachHostTOS			= 12;

const TUint	KTraceRtCodeUnreachProhibited		= 13;

const TUint	KTraceRtCodeUnreachPrecVolation		= 14;

const TUint	KTraceRtCodeUnreachPrecCutoff		= 15;

const TUint KTraceRtTypeTimeExceeded			= 11;

const TUint	KTraceRtCodeExceedInTransit			= 0;

const TUint	KTraceRtCodeExceedInReasm			= 1;

const TUint KTraceRtCodeTimeout					= KMaxTUint;

const TUint KTraceRtCodeTimedOutInTransit		= KMaxTUint-1;

const TUint KTraceRtCodeEchoReply				= KMaxTUint-2;

#endif