/*

* 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 42 

	#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_variable_data.h"

#include "abs_eap_am_tools.h"

#include "eap_am_tools.h"

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

EAP_FUNC_EXPORT eap_status_e eap_variable_data_c::initialize_members()

{

	m_data = new eap_variable_data_impl_str;

	if (m_data == 0)

	{

		EAP_TRACE_ERROR(

			m_am_tools,

			TRACE_FLAGS_DEFAULT,

			(EAPL("eap_variable_data_c::initialize_members(): Cannot allocate %d bytes.\n"),

			sizeof(eap_variable_data_impl_str)));

		return EAP_STATUS_RETURN(m_am_tools, eap_status_allocation_error);

	}

	m_data->m_buffer = 0;

	m_data->m_buffer_length = 0ul;

	m_data->m_real_data_start_index = 0ul;

	m_data->m_real_data_length = 0ul;

	m_data->m_free_buffer = false;

	m_data->m_is_writable = false;

	m_data->m_is_valid = true;

	return EAP_STATUS_RETURN(m_am_tools, eap_status_ok);

}

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

EAP_FUNC_EXPORT eap_variable_data_c::~eap_variable_data_c()

{

	if (m_data != 0)

	{

		if (m_data->m_free_buffer == true)

		{

			// Buffer was allocated.

#if !defined(NO_EAP_VARIABLE_DATA_MEMORY_ZERO)

			if (m_am_tools != 0)

			{

				m_am_tools->memset(m_data->m_buffer, 0, m_data->m_buffer_length);

			}

#endif //#if !defined(NO_EAP_VARIABLE_DATA_MEMORY_ZERO)

			delete [] m_data->m_buffer;

		}

		m_data->m_buffer = 0;

		m_data->m_buffer_length = 0ul;

		m_data->m_real_data_start_index = 0ul;

		m_data->m_real_data_length = 0ul;

		m_data->m_free_buffer = false;

		m_data->m_is_valid = false;

		delete m_data;

		m_data = 0;

	}

}

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

EAP_FUNC_EXPORT eap_variable_data_c::eap_variable_data_c(

	abs_eap_am_tools_c * const tools)

	: m_am_tools(tools)

	, m_data(0)

{

	eap_status_e status = initialize_members();

	if (status != eap_status_ok)

	{

		// ERROR.

		return;

	}

}

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

EAP_FUNC_EXPORT eap_variable_data_c::eap_variable_data_c(

	abs_eap_am_tools_c * const tools,

	const void * const buffer,

	const u32_t buffer_length,

	bool free_buffer,

	bool is_writable)

	: m_am_tools(tools)

	, m_data(0)

{

	eap_status_e status = initialize_members();

	if (status != eap_status_ok)

	{

		// ERROR.

		return;

	}

	status = set_buffer(

		buffer,

		buffer_length,

		free_buffer,

		is_writable);

	if (status != eap_status_ok)

	{

		// ERROR.

		set_is_invalid();

		return;

	}

}

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

EAP_FUNC_EXPORT bool eap_variable_data_c::get_is_valid() const

{

	if (m_data == 0)

	{

		return false;

	}

	return m_data->m_is_valid;

}

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

EAP_FUNC_EXPORT bool eap_variable_data_c::get_is_valid_data() const

{

	if (m_data == 0)

	{

		return false;

	}

	if (m_data->m_is_valid == false)

	{

		return false;

	}

	// Note the data length could be zero.

	if (m_data->m_buffer == 0)

	{

		return false;

	}

	return true;

}

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

EAP_FUNC_EXPORT void eap_variable_data_c::set_is_valid()

{

	EAP_ASSERT_TOOLS(m_am_tools, m_data != 0);

	if (m_data == 0)

	{

		return;

	}

	m_data->m_is_valid = true;

}

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

EAP_FUNC_EXPORT void eap_variable_data_c::set_is_invalid()

{

	EAP_ASSERT_TOOLS(m_am_tools, m_data != 0);

	if (m_data == 0)

	{

		return;

	}

	m_data->m_is_valid = false;

}

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

EAP_FUNC_EXPORT bool eap_variable_data_c::get_is_writable() const

{

	EAP_ASSERT_TOOLS(m_am_tools, m_data != 0);

	if (m_data == 0)

	{

		return false;

	}

	return m_data->m_is_writable;

}

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

EAP_FUNC_EXPORT u8_t * eap_variable_data_c::get_buffer_offset(

	const u32_t offset,

	const u32_t buffer_length) const

{

	EAP_ASSERT_TOOLS(m_am_tools, m_data != 0);

	if (m_data != 0

		&& m_data->m_is_valid == true

		&& m_data->m_buffer_length >= (m_data->m_real_data_start_index+offset+buffer_length))

	{

		return m_data->m_buffer + (m_data->m_real_data_start_index + offset);

	}

	else

	{

		EAP_ASSERT_TOOLS(

			m_am_tools,

			m_data != 0

			&& m_data->m_is_valid == true

			&& m_data->m_buffer_length

			>= (m_data->m_real_data_start_index+offset+buffer_length));

		return 0;

	}

}

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

EAP_FUNC_EXPORT u8_t * eap_variable_data_c::get_buffer(const u32_t buffer_length) const

{

	return get_buffer_offset(0u, buffer_length);

}

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

EAP_FUNC_EXPORT u8_t * eap_variable_data_c::get_data_offset(

	const u32_t offset,

	const u32_t data_length) const

{

	EAP_ASSERT_TOOLS(m_am_tools, m_data != 0);

	if (m_data != 0

		&& m_data->m_is_valid == true

		&& m_data->m_real_data_length >= (offset+data_length))

	{

		return get_buffer_offset(offset, data_length);

	}

	else

	{

		EAP_ASSERT_TOOLS(

			m_am_tools,

			m_data != 0

			&& m_data->m_is_valid == true

			&& m_data->m_real_data_length >= (offset+data_length));

		return 0;

	}

}

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

#if !defined(USE_EAP_INLINE_FUNCTIONS)

EAP_FUNC_EXPORT u8_t * eap_variable_data_c::get_data() const

{

	return get_data(get_data_length());

}

#endif //#if !defined(USE_EAP_INLINE_FUNCTIONS)

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

EAP_FUNC_EXPORT u8_t * eap_variable_data_c::get_data(const u32_t data_length) const

{

	return get_data_offset(0u, data_length);

}

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

#if !defined(USE_EAP_INLINE_FUNCTIONS)

EAP_FUNC_EXPORT u32_t eap_variable_data_c::get_data_length() const

{

	EAP_ASSERT_TOOLS(m_am_tools, m_data != 0);

	if (m_data != 0

		&& m_data->m_is_valid == true)

	{

		return m_data->m_real_data_length;

	}

	else

	{

		return 0u;

	}

}

#endif //#if !defined(USE_EAP_INLINE_FUNCTIONS)

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

#if !defined(USE_EAP_INLINE_FUNCTIONS)

EAP_FUNC_EXPORT u32_t eap_variable_data_c::get_buffer_length() const

{

	EAP_ASSERT_TOOLS(m_am_tools, m_data != 0);

	if (m_data != 0

		&& m_data->m_is_valid == true)

	{

		return m_data->m_buffer_length;

	}

	else

	{

		return 0u;

	}

}

#endif //#if !defined(USE_EAP_INLINE_FUNCTIONS)

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

EAP_FUNC_EXPORT eap_status_e eap_variable_data_c::reset_start_offset_and_data_length()

{

	if (m_data != 0

		&& m_data->m_is_valid == true)

	{

		m_data->m_real_data_start_index = 0ul;

		m_data->m_real_data_length = 0ul;

		return EAP_STATUS_RETURN(m_am_tools, eap_status_ok);

	}

	else

	{

		EAP_ASSERT_TOOLS(

			m_am_tools,

			m_data != 0

			&& m_data->m_is_valid == true);

		return EAP_STATUS_RETURN(m_am_tools, eap_status_process_general_error);

	}

}

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

EAP_FUNC_EXPORT eap_status_e eap_variable_data_c::set_start_offset(const u32_t index)

{

	if (m_data != 0

		&& m_data->m_is_valid == true

		&& m_data->m_real_data_length >= index)

	{

		m_data->m_real_data_start_index += index;

		m_data->m_real_data_length -= index;

		return EAP_STATUS_RETURN(m_am_tools, eap_status_ok);

	}

	else

	{

		EAP_ASSERT_TOOLS(

			m_am_tools,

			m_data != 0

			&& m_data->m_is_valid == true

			&& m_data->m_real_data_length >= index);

		return EAP_STATUS_RETURN(m_am_tools, eap_status_process_general_error);

	}

}

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

EAP_FUNC_EXPORT eap_status_e eap_variable_data_c::set_data_length(

	const u32_t length)

{

	if (m_data != 0

		&& m_data->m_is_valid == true

		&& m_data->m_buffer_length >= (m_data->m_real_data_start_index + length))

	{

		m_data->m_real_data_length = length;

		return EAP_STATUS_RETURN(m_am_tools, eap_status_ok);

	}

	else

	{

		EAP_ASSERT_TOOLS(

			m_am_tools,

			m_data != 0

			&& m_data->m_is_valid == true

			&& m_data->m_buffer_length >= (m_data->m_real_data_start_index + length));

		return EAP_STATUS_RETURN(m_am_tools, eap_status_process_general_error);

	}

}

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

EAP_FUNC_EXPORT eap_status_e eap_variable_data_c::reset()

{

	if (m_data == 0)

	{

		eap_status_e status = initialize_members();

		if (status != eap_status_ok)

		{

			// ERROR.

			return EAP_STATUS_RETURN(m_am_tools, eap_status_allocation_error);

		}

	}

	else

	{

		if (m_data->m_free_buffer == true)

		{

#if !defined(NO_EAP_VARIABLE_DATA_MEMORY_ZERO)

			m_am_tools->memset(m_data->m_buffer, 0, m_data->m_buffer_length);

#endif //#if !defined(NO_EAP_VARIABLE_DATA_MEMORY_ZERO)

			delete [] m_data->m_buffer;

			m_data->m_free_buffer = false;

		}

		m_data->m_buffer = 0;

		m_data->m_buffer_length = 0u;

		m_data->m_real_data_start_index = 0ul;

		m_data->m_real_data_length = 0u;

	}

	return EAP_STATUS_RETURN(m_am_tools, eap_status_ok);

}

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

EAP_FUNC_EXPORT eap_status_e eap_variable_data_c::set_buffer(

	const void * const p_buffer,

	const u32_t buffer_length,

	bool free_buffer,

	bool is_writable)

{

	return set_buffer(

		const_cast<void *>(p_buffer),

		buffer_length,

		free_buffer,

		is_writable);

}

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

EAP_FUNC_EXPORT eap_status_e eap_variable_data_c::set_buffer(

	void * const p_buffer,

	const u32_t buffer_length,

	bool free_buffer,

	bool is_writable)

{

	if (m_data == 0)

	{

		eap_status_e status = initialize_members();

		if (status != eap_status_ok)

		{

			// ERROR.

			return EAP_STATUS_RETURN(m_am_tools, eap_status_allocation_error);

		}

	}

	if (p_buffer == 0

		&& buffer_length != 0UL)

	{

		return EAP_STATUS_RETURN(m_am_tools, eap_status_illegal_parameter);

	}

	reset();

	m_data->m_free_buffer = free_buffer;

	m_data->m_is_writable = is_writable;

	m_data->m_buffer = static_cast<u8_t *>(p_buffer);

	m_data->m_buffer_length = buffer_length;

	m_data->m_real_data_start_index = 0ul;

	m_data->m_real_data_length = buffer_length;

	// This cannot fail.

	return EAP_STATUS_RETURN(m_am_tools, eap_status_ok);

}

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

EAP_FUNC_EXPORT eap_status_e eap_variable_data_c::set_buffer(

	const eap_variable_data_c * const buffer)

{

	if (m_data == 0)

	{

		eap_status_e status = initialize_members();

		if (status != eap_status_ok)

		{

			// ERROR.

			return EAP_STATUS_RETURN(m_am_tools, eap_status_allocation_error);

		}

	}

	EAP_ASSERT_TOOLS(m_am_tools, m_data != 0);

	if (buffer == 0)

	{

		return EAP_STATUS_RETURN(m_am_tools, eap_status_illegal_parameter);

	}

	if (buffer == this)

	{

		// Here we are setting buffer from from itself.

		return EAP_STATUS_RETURN(m_am_tools, eap_status_ok);

	}

	return EAP_STATUS_RETURN(m_am_tools, set_buffer(

		buffer->get_data(),

		buffer->get_data_length(),

		false,

		true));

}