/*

* 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.

*

*/

// This is enumeration of EAPOL source code.

#if defined(USE_EAP_MINIMUM_RELEASE_TRACES)

	#undef EAP_FILE_NUMBER_ENUM

	#define EAP_FILE_NUMBER_ENUM 598 

	#undef EAP_FILE_NUMBER_DATE 

	#define EAP_FILE_NUMBER_DATE 1127594498 

#endif //#if defined(USE_EAP_MINIMUM_RELEASE_TRACES)

#include "eap_am_memory.h"

#include "simple_config_tlv_header.h"

#include "simple_config_types.h"

/** @file */

/**

 * The destructor of the simple_config_tlv_header_c class does nothing.

 */

simple_config_tlv_header_c::~simple_config_tlv_header_c()

{

}

/**

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

 */

simple_config_tlv_header_c::simple_config_tlv_header_c(

	abs_eap_am_tools_c * const tools)

	: eap_general_header_base_c(tools, 0, 0ul)

	, m_am_tools(tools)

{

}

/**

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

 */

simple_config_tlv_header_c::simple_config_tlv_header_c(

	abs_eap_am_tools_c * const tools,

	void * const header_begin,

	const u32_t header_buffer_length)

	: eap_general_header_base_c(tools, header_begin, header_buffer_length)

	, m_am_tools(tools)

{

}

/**

 * This function returns the TLV type flag.

 */

simple_config_Attribute_Type_e simple_config_tlv_header_c::get_tlv_type() const

{

	const u8_t * const flag_tlv_type_data = get_header_offset(m_tlv_type_offset, sizeof(u16_t));

	if (flag_tlv_type_data != 0)

	{

		return static_cast<simple_config_Attribute_Type_e>(

			(static_cast<u16_t>(flag_tlv_type_data[0] << 8)

			| (static_cast<u16_t>(flag_tlv_type_data[1]))));

	}

	else

	{

		return simple_config_Attribute_Type_None;

	}

}

/**

 * This function returns the data length of TLV.

 */

u32_t simple_config_tlv_header_c::get_length() const

{

	return get_header_length() + get_data_length();

}

/**

 * This function returns the data length of TLV.

 */

u16_t simple_config_tlv_header_c::get_data_length() const

{

	const u8_t * const length_data = get_header_offset(m_length_offset, sizeof(u16_t));

	if (length_data != 0)

	{

		return eap_read_u16_t_network_order(length_data, sizeof(u16_t));

	}

	else

	{

		return 0ul;

	}

}

/**

 * This function returns the header length of TLV.

 */

u32_t simple_config_tlv_header_c::get_header_length()

{

	return m_data_offset;

}

/**

 * 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 * simple_config_tlv_header_c::get_data_offset(const u32_t offset, const u32_t contignuous_bytes) const

{

	EAP_UNREFERENCED_PARAMETER(m_am_tools);

	u32_t data_length = get_data_length(); // Here is removed optional SIMPLE_CONFIG message length.

	if (data_length >= offset+contignuous_bytes)

	{

		u8_t * const data = get_header_offset(m_data_offset, offset+contignuous_bytes);

		if (data != 0)

		{

			return &data[offset];

		}

		else

		{

			return 0;

		}

	}

	else

	{

		EAP_ASSERT_ALWAYS(data_length >= offset+contignuous_bytes);

	}

	return 0;

}

/**

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

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

 */

u8_t * simple_config_tlv_header_c::get_data(const u32_t contignuous_bytes) const

{

	return get_data_offset(0u, contignuous_bytes);

}

/**

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

 */

u8_t * simple_config_tlv_header_c::get_next_header() const

{

	if (get_header_buffer_length() >= 2ul*get_header_length()+get_data_length())

	{

		return get_data_offset(get_data_length(), get_header_length());

	}

	else

	{

		return 0;

	}

}

/**

 * This function checks the header is valid.

 */

eap_status_e simple_config_tlv_header_c::check_header() const

{

	if (get_tlv_type() < simple_config_Attribute_Type_First_Correct_Value

		|| get_tlv_type() > simple_config_Attribute_Type_Last_Correct_Value)

	{

		return EAP_STATUS_RETURN(m_am_tools, eap_status_header_corrupted);

	}

	return EAP_STATUS_RETURN(m_am_tools, eap_status_ok);

}

/**

 * This function returns debug strings of the TLV type.

 */

eap_const_string simple_config_tlv_header_c::get_tlv_type_string() const

{

	eap_simple_config_trace_string_c debug_string;

	return debug_string.get_attribute_type_string(get_tlv_type());

}

/**

 * This function sets the TLV type flag.

 */

void simple_config_tlv_header_c::set_tlv_type(simple_config_Attribute_Type_e type)

{

	u8_t * const flag_tlv_type_data = get_header_offset(m_tlv_type_offset, sizeof(u16_t));

	EAP_ASSERT(flag_tlv_type_data != 0);

	flag_tlv_type_data[0] = static_cast<u8_t>((type & 0xff00) >> 8);

	flag_tlv_type_data[1] = static_cast<u8_t>(type & 0x00ff);

}

/**

 * This function sets the TLV data length.

 */

void simple_config_tlv_header_c::set_data_length(const u16_t p_length)

{

	u8_t * const length_data = get_header_offset(m_length_offset, sizeof(u16_t));

	EAP_ASSERT(length_data != 0);

	length_data[0] = static_cast<u8_t>((p_length & 0xff00) >> 8);

	length_data[1] = static_cast<u8_t>((p_length & 0x00ff));

}

/**

 * This function resets the TLV header.

 */

void simple_config_tlv_header_c::reset_header(const u16_t buffer_length)

{

	set_tlv_type(simple_config_Attribute_Type_None);

	set_data_length(buffer_length);

}

// End.