// 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 AY, May 1997

// 

//

#include <e32base.h>

#include <es_sock.h>

#include <in_sock.h>

#include <e32test.h>

#include <f32file.h>

enum TOpCode 

	{

	ERRQ=1,EWRQ,EDATA,EACK,EERR

	};

enum TOpComp 

	{

	ETimedOut=1,ESendFail,ERecvFail,EOpComplete,EFileOpenFailure,EError

	};

class TTftpPacket : public TPtr8

	{

public:

	TTftpPacket();

	TBool CheckBlock();

	TInt OpCode();

	void MakeRqst(const TOpCode aOpc, const TDesC& aName, const TDesC& aMode); 

	void MakeAckn();

	TInt MakeData(const TDesC8& aData);  

	void MakeError();//will need error code (will then lookup msg? 

private:

	TUint8 iBuffer[516];

	TUint16 iBlockNum;

	};

class CTftpEngine;

class CTftpTimer: public CTimer

	{

public:

	~CTftpTimer();

	static CTftpTimer* NewL(const TInt aPriority, CTftpEngine& aEngine);

protected:

    CTftpTimer(const TInt aPriority, CTftpEngine& aEngine);

	void ConstructL();

    virtual void RunL();

private:

	CTftpEngine& iEngine;

	};

class MTftpNotifier 

	{

public:

	virtual void OpComplete(TOpComp aResult, TInt aOp)=0;

	virtual void ProgressNotification()=0;

	};

class CTftpEngine: public CActive

	{

private:

	enum TState 

		{

		ESending, EReceiving, EComplete, ESendingLastData, 

		ESendingLastAckn, EReceivingLast

		};

public:

	IMPORT_C ~CTftpEngine();

	IMPORT_C void Get(const TDesC& aNetAddr, const TDesC& aName, const TDesC& aMode = _L("Octet"));

	IMPORT_C void Put(const TDesC& aNetAddr, const TDesC& aName, const TDesC& aMode = _L("Octet"));

	IMPORT_C void TimerExpired();

	IMPORT_C void SetTimeOut(const TInt aTimeOut);

	IMPORT_C static CTftpEngine *NewL(const TInt aPriority, MTftpNotifier& aNotifier);

protected:

    virtual void RunL();

    virtual void DoCancel();

private:

	CTftpEngine(const TInt aPriority, MTftpNotifier& aNotifier);

    void ConstructL();

private:

	RSocketServ iSockServ;

	RSocket iSocket;

	RFs iFs;

	RFile iFile;

	CTftpTimer* iTimer;

	TTftpPacket iPacket;

	TInt iTimeOut;

	TInetAddr iAddress;

	TState iState;

	MTftpNotifier& iNotifier;

	};