/**

* Copyright (c) 1998-2009 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:

* PASV command answer parser

* Author:	Philippe Gabriel

* RFC 959 defines the syntax for answer to the PASV command

* We must parse an IP+Port number (decimal, big endian)

* (ip1,ip2,ip3,ip4,ip5,port1,port2)

* We parse these regular expressions using an FSM

* Use:

* TFtpPASVAnswerParser::Reset 

* to Reset the parser before we begin to parse a new answer

* TFtpPASVAnswerParser::Parse 

* to parse an answer

* returns:

* TRUE: we parsed an answer (answer might be correct or inccorect)

* FALSE: An answer has not been completely parsed yet

* TFtpPASVAnswerParser::Fetch 

* Fetch an answer

* returns:

* TRUE: We got a valid answer

* FALSE: The answer we got had an invalid syntax

* 

*

*/

/**

 @file PASVANS.H

 @internalComponent

*/

#if !defined(__PASVANS_H__)

#define __PASVANS_H__

#include <e32base.h>

#include <in_sock.h>

//////////////////////////////////////////////////////////////

// Definitions

//////////////////////////////////////////////////////////////

class TFtpPASVAnswerParser 

/**

@internalComponent

*/

{

public:

	enum TState

		{

		/** Do some clever encoding here 

		*/

		EIdle=0,	

		/** to simplify parsing code

		*/

		EBeginParse=1,	

		EParsing=2,

		ESuccess,EFailed

		};

			TFtpPASVAnswerParser(void){iState=EIdle;}

	TBool	Parse(const TDesC8&, const TInetAddr& aAddr);

	TBool	Fetch(TInetAddr& aFTPServerAddress);

	void	Reset(void);

private:

	/** Helper to Parse() */

	TBool ParsePASV(const TDesC8&); 

	/** Helper to Parse() */

	TBool ParseEPSV(const TDesC8&); 

	/** The current state of the parser */

	TUint		iState;	

	/** The parsed answer digits */

	TBuf<12>	iDigit; 

	TInetAddr   iFTPServerAddress;

	TInt		iNumberCounter;

};

#endif // __PASVANS_H__