/*

* ============================================================================

*  Name        : ./accesssec/eapol/eapol_framework/wapi_common/include/wai_tlv_header.h

*  Part of     : WAPI / WAPI       *** Info from the SWAD

*  Description : WAPI authentication

*  Version     : %version: 11 % << Don't touch! Updated by Synergy at check-out.

*

*  Copyright © 2001-2009 Nokia.  All rights reserved.

*  This material, including documentation and any related computer

*  programs, is protected by copyright controlled by Nokia.  All

*  rights are reserved.  Copying, including reproducing, storing,

*  adapting or translating, any or all of this material requires the

*  prior written consent of Nokia.  This material also contains

*  confidential information which may not be disclosed to others

*  without the prior written consent of Nokia.

* ============================================================================

* Template version: 4.2

*/

#if !defined(_WAI_TLV_HEADER_H_)

#define _WAI_TLV_HEADER_H_

#if defined(USE_WAPI_CORE)

#include "eap_tools.h"

#include "eap_general_header_base.h"

#include "wapi_types.h"

/** @file */

//----------------------------------------------------------------------------

/// This class defines header of Attribute-Value Pairs.

/**

 * Here is a figure of header of Attribute-Value Pairs.

 * Value data follows wai_tlv_header_c.

 * @code

 *  TLV-header:

 *  0                   1                   2                   3   

 *  0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 

 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+

 * |     Type      |            Length             |  Value...

 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+

 * @endcode

 * 

 * @code

 * The fields of this header are:

 *  8-bits Type;               This is a TLV type.

 * 16-bits value length (Length);  This is a length field, the length (in bytes) of the following value.

 * @endcode

 * 

 * For details see <a href="../../../internal/doc/WAPI/WAPI_design.doc">WAPI_design.doc</a>.

 */

class EAP_EXPORT wai_tlv_header_c

: public eap_general_header_base_c

{

private:

	//--------------------------------------------------

	/// This is pointer to the tools class.

	abs_eap_am_tools_c * const m_am_tools;

	//--------------------------------------------------

protected:

	//--------------------------------------------------

	/// This is enumeration of sizes of data fields.

	enum size

	{

		m_type_size = sizeof(u8_t),    ///< This is size of tlv type 8-bit field.

		m_length_size = sizeof(u16_t), ///< This is size of length 16-bit field.

	};

	/// This is enumeration of offsets to data fields.

	enum offsets

	{

		m_type_offset = 0ul,                           ///< This is offset to fags and tlv type 8-bit field.

		m_length_offset = m_type_offset+m_type_size,   ///< This is offset to length 16-bit field.

		m_data_offset = m_length_offset+m_length_size, ///< This is offset to data field.

	};

	//--------------------------------------------------

public:

	//--------------------------------------------------

	/**

	 * The destructor of the wai_tlv_header_c class does nothing.

	 */

	virtual ~wai_tlv_header_c();

	/**

	 * The constructor of the wai_tlv_header_c class simply initializes the attributes.

	 */

	wai_tlv_header_c(

		abs_eap_am_tools_c * const tools,

		void * const header_begin,

		const u32_t header_buffer_length);

	/**

	 * This function returns the TLV type.

	 */

	wai_tlv_type_e get_type() const;

	/**

	 * This function returns the data length of TLV.

	 */

	u32_t get_data_length() const;

	/**

	 * This function returns the header length of TLV.

	 */

	static u32_t get_header_length();

	/**

	 * This function returns pointer to the offset of data of TLV.

	 * @param offset is the offset of queried data in bytes.

	 * @param contignuous_bytes is the length of queried data in bytes.

	 */

	u8_t * get_data_offset(const u32_t offset, const u32_t contignuous_bytes) const;

	/**

	 * This function returns pointer to the offset of data of TLV.

	 * @param contignuous_bytes is the length of queried data in bytes.

	 */

	u8_t * get_data(const u32_t contignuous_bytes) const;

	/**

	 * This function return pointer to the next TLV header in the same buffer.

	 */

	u8_t * get_next_header() const;

	/**

	 * This function checks the header is valid.

	 */

	eap_status_e check_header() const;

	/**

	 * This function returns debug strings of the TLV type.

	 */

	static eap_const_string get_tlv_type_string(const wai_tlv_type_e type);

	/**

	 * This function returns debug strings of the TLV type.

	 */

	eap_const_string get_tlv_type_string() const;

	/**

	 * This function sets the TLV type flag.

	 */

	eap_status_e set_type(const wai_tlv_type_e type);

	/**

	 * This function sets the TLV data length.

	 */

	eap_status_e set_data_length(const u32_t p_length);

	/**

	 * This function resets the TLV header.

	 */

	eap_status_e reset_header();

	/**

	 * This function resets the TLV header object.

	 */

	eap_status_e reset();

	// 

	//--------------------------------------------------

}; // class wai_tlv_header_c

//----------------------------------------------------------------------------------

/// Macro traces wai_tlv_header_c type and data.

#define WAI_TLV_HEADER_TRACE_PAYLOAD(prefix, wai_tlv, when_true_is_client) \

	{ \

		EAP_TRACE_DEBUG( \

			m_am_tools, TRACE_FLAGS_DEFAULT|TRACE_TEST_VECTORS, \

			(EAPL("v v v v v v v v v v v v v v v v v v v v v v v v v v v v v v v v v v v v v v v v v v v v \n"))); \

		EAP_TRACE_DEBUG( \

			m_am_tools, TRACE_FLAGS_DEFAULT|TRACE_TEST_VECTORS, \

			(EAPL("- %s %s (0x%08x): TLV type 0x%04x=%s, data length 0x%04x.\n"), \

			prefix, \

			((when_true_is_client) == true ? "client" : "server"), \

			(wai_tlv)->get_header_buffer((wai_tlv)->get_data_length()), \

			(wai_tlv)->get_payload_type(), \

			(wai_tlv)->get_tlv_type_string(), \

			(wai_tlv)->get_data_length())); \

		EAP_TRACE_DATA_DEBUG(m_am_tools, TRACE_FLAGS_DEFAULT|TRACE_TEST_VECTORS, \

			(EAPL("- data"), (wai_tlv)->get_data((wai_tlv)->get_data_length()), \

			(wai_tlv)->get_data_length())); \

		EAP_TRACE_DEBUG( \

			m_am_tools, TRACE_FLAGS_DEFAULT|TRACE_TEST_VECTORS, \

			(EAPL("^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ \n"))); \

	}

//----------------------------------------------------------------------------------

#endif //#if defined(USE_WAPI_CORE)

#endif //#if !defined(_WAI_TLV_HEADER_H_)

// End.