/*

* 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 39 

	#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 "eap_tlv_header.h"

/** @file */

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

EAP_FUNC_EXPORT eap_tlv_header_c::~eap_tlv_header_c()

{

}

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

EAP_FUNC_EXPORT eap_tlv_header_c::eap_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)

{

}

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

EAP_FUNC_EXPORT eap_tlv_type_t eap_tlv_header_c::get_type() const

{

	const u8_t * const tlv_type_data = get_header_offset(m_type_offset, sizeof(u32_t));

	if (tlv_type_data != 0)

	{

		return static_cast<eap_tlv_type_t>(eap_read_u32_t_network_order(tlv_type_data, sizeof(u32_t)));

	}

	else

	{

		return eap_tlv_type_none;

	}

}

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

EAP_FUNC_EXPORT u32_t eap_tlv_header_c::get_value_length() const

{

	const u8_t * const tlv_length_data = get_header_offset(m_length_offset, sizeof(u32_t));

	if (tlv_length_data != 0)

	{

		return eap_read_u32_t_network_order(tlv_length_data, sizeof(u32_t));

	}

	else

	{

		return 0ul;

	}

}

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

EAP_FUNC_EXPORT u32_t eap_tlv_header_c::get_header_length()

{

	return m_data_offset;

}

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

EAP_FUNC_EXPORT u8_t * eap_tlv_header_c::get_value_offset(const u32_t offset, const u32_t contignuous_bytes) const

{

	EAP_UNREFERENCED_PARAMETER(m_am_tools);

	u32_t data_length = get_value_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;

}

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

EAP_FUNC_EXPORT u8_t * eap_tlv_header_c::get_value(const u32_t contignuous_bytes) const

{

	return get_value_offset(0u, contignuous_bytes);

}

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

EAP_FUNC_EXPORT eap_status_e eap_tlv_header_c::check_header() const

{

	if ((get_header_length() + get_value_length()) > get_header_buffer_length())

	{

		EAP_TRACE_END(m_am_tools, TRACE_FLAGS_DEFAULT);

		return EAP_STATUS_RETURN(m_am_tools, eap_status_header_corrupted);

	}

	return EAP_STATUS_RETURN(m_am_tools, eap_status_ok);

}

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

EAP_FUNC_EXPORT eap_status_e eap_tlv_header_c::set_type(const eap_tlv_type_t type)

{

	if (type == eap_tlv_type_none)

	{

		EAP_ASSERT(type != eap_tlv_type_none);

		return EAP_STATUS_RETURN(m_am_tools, eap_status_wrong_type);

	}

	u8_t * const type_data = get_header_offset(m_type_offset, sizeof(u32_t));

	if (type_data == 0)

	{

		EAP_ASSERT(type_data != 0);

		return EAP_STATUS_RETURN(m_am_tools, eap_status_header_corrupted);

	}

	eap_write_u32_t_network_order(type_data, sizeof(u32_t), type);

	return EAP_STATUS_RETURN(m_am_tools, eap_status_ok);

}

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

EAP_FUNC_EXPORT eap_status_e eap_tlv_header_c::set_value_length(const u32_t value_length)

{

	if (get_header_length() + value_length > get_header_buffer_length())

	{

		EAP_ASSERT(get_header_length() + value_length <= get_header_buffer_length());

		return EAP_STATUS_RETURN(m_am_tools, eap_status_too_long_message);

	}

	u8_t * const length_data = get_header_offset(m_length_offset, sizeof(u32_t));

	if (length_data == 0)

	{

		EAP_ASSERT(length_data != 0);

		return EAP_STATUS_RETURN(m_am_tools, eap_status_header_corrupted);

	}

	eap_write_u32_t_network_order(length_data, sizeof(u32_t), value_length);

	return EAP_STATUS_RETURN(m_am_tools, eap_status_ok);

}

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

EAP_FUNC_EXPORT eap_status_e eap_tlv_header_c::reset_header(

	const eap_tlv_type_t type,

	const u32_t value_length)

{

	eap_status_e status = set_type(type);

	if (status != eap_status_ok)

	{

		return EAP_STATUS_RETURN(m_am_tools, status);

	}

	status = set_value_length(value_length);

	if (status != eap_status_ok)

	{

		return EAP_STATUS_RETURN(m_am_tools, status);

	}

	return EAP_STATUS_RETURN(m_am_tools, eap_status_ok);

}

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

// End.