/*

* Copyright (c) 2001-2006 Nokia Corporation and/or its subsidiary(-ies).

* All rights reserved.

* This component and the accompanying materials are made available

* under the terms of the License "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:  EAP and WLAN authentication protocols.

*

*/

/*

*/

#if !defined(_TLS_HANDSHAKE_HEADER_H_)

#define _TLS_HANDSHAKE_HEADER_H_

#include "eap_tools.h"

#include "eap_header.h"

#include "eap_general_header_base.h"

#include "tls_peap_types.h"

/** @file */

/**

 * This is enumeration of TLS-Handshake message types.

 */

enum tls_handshake_type_e

{

	tls_handshake_type_hello_request       = (0),

	tls_handshake_type_client_hello        = (1),

	tls_handshake_type_server_hello        = (2),

#if defined(USE_EAP_TLS_SESSION_TICKET)

	tls_handshake_type_new_session_ticket  = (4),

#endif // #if defined(USE_EAP_TLS_SESSION_TICKET)

	tls_handshake_type_certificate         = (11),

	tls_handshake_type_server_key_exchange = (12),

	tls_handshake_type_certificate_request = (13),

	tls_handshake_type_server_hello_done   = (14),

	tls_handshake_type_certificate_verify  = (15),

	tls_handshake_type_client_key_exchange = (16),

	tls_handshake_type_finished            = (20),

	tls_handshake_type_none                = (255),

};

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

/// This class defines header of TLS handshake protocol.

/**

 * Here is a figure of header of TLS handshake protocol.

 * TLS-type data follows tls_handshake_header_c.

 * @code

 *  TLS handshake-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: aa      | Length: h     | Length: m     | Length: l     |

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

 * 

 * Handshake message follows immediately the TLS handshake-header.

 * @endcode

 * 

 * @code

 * The fields of this header are:

 * 8-bits  m_handshake_type;  This is a protocol type field. Look at tls_handshake_type_e values.

 * 24-bits m_length;          This is a length field. Length is measured in bytes and it does not include 

 *                            m_handshake_type, m_length_high, m_length_middle and m_length_low

 *                            fields, only the length of the following handshake message.

 * @endcode

 * 

 */

class EAP_EXPORT tls_handshake_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;

	enum sizes

	{

		m_max_data_length = TLS_PEAP_MAX_HANDSHAKE_DATA_LENGTH,

	};

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

protected:

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

	enum offsets

	{

		m_type_offset = 0ul,                                ///< This is offset of the type 8-bit field.

		m_length_offset = m_type_offset+sizeof(u8_t),       ///< This is offset of the length 24-bit field.

		m_data_offset = m_length_offset+(3ul*sizeof(u8_t)), ///< This is offset of the data.

	};

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

public:

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

	/**

	 * Destructor does nothing.

	 */

	virtual ~tls_handshake_header_c();

	/**

	 * Constructor initializes class.

	 */

	tls_handshake_header_c(

		abs_eap_am_tools_c * const tools,

		void * const header_buffer,

		const u32_t header_buffer_length);

	/**

	 * This function returns TLS-handshake type.

	 */

	tls_handshake_type_e get_handshake_type() const;

	/**

	 * This function returns data length of TLS-handshake message.

	 * Length is measured in bytes and it does not include m_handshake_type, m_length_high,

	 * m_length_middle and m_length_low fields, only the length of the following handshake message.

	 */

	u32_t get_data_length() const;

	/**

	 * This function returns maximum data length of TLS-handshake message.

	 */

	static u32_t get_max_data_length();

	/**

	 * This function returns header length of TLS-handshake message.

	 */

	static u32_t get_header_length();

	/**

	 * This function returns pointer to the offset of data of TLS-handshake message.

	 */

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

	/**

	 * This function returns pointer to data of TLS-handshake message.

	 */

	u8_t * get_data(const u32_t contignuous_bytes) const;

	/**

	 * This function returns debug string of TLS-handshake type.

	 */

	static eap_const_string get_tls_handshake_string(

		const tls_handshake_type_e type);

	/**

	 * This function returns debug string of TLS-handshake type.

	 */

	eap_const_string get_tls_handshake_string() const;

	/**

	 * This function sets the TLS-handshake type.

	 */

	void set_handshake_type(tls_handshake_type_e handshake_type);

	/**

	 * This function sets the length of data of the TLS-handshake type.

	 */

	void set_data_length(const u32_t p_length);

	/**

	 * This function resets the header of the TLS-handshake type.

	 */

	void reset_header(

		const u32_t data_length);

	/**

	 * This function checks header of TLS-handshake message.

	 */

	eap_status_e check_header() const;

	/**

	 * This function checks header of TLS-handshake message

	 * is required type.

	 */

	eap_status_e check_header(

		const tls_handshake_type_e required_type,

		const bool /*is_client_when_true*/) const;

	// 

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

}; // class tls_handshake_header_c

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

#endif //#if !defined(_TLS_HANDSHAKE_HEADER_H_)

// End.