--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/eapol/eapol_framework/eapol_common/common/eap_buffer.cpp	Thu Dec 17 08:47:43 2009 +0200
@@ -0,0 +1,1069 @@
+/*
+* 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 21 
+	#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_buffer.h"
+#include "eap_am_assert.h"
+#include "eap_am_tools.h"
+#include "eapol_ethernet_header.h"
+
+static const bool EAP_BUFFER_DO_PACKET_RETRANSMISSION_INIT_VALUE = true;
+
+//-----------------------------------------------------------------------------
+
+EAP_FUNC_EXPORT bool eap_buf_chain_base_c::check_guard_bytes(const u8_t * const guard) const
+{
+	EAP_ASSERT_TOOLS(m_am_tools, m_data != 0);
+
+	if (m_data == 0)
+	{
+		return false;
+	}
+
+	u32_t ind = 0;
+	for (ind = 0; ind < m_data->m_mem_guard_length; ind++)
+	{
+		if (guard[ind] != EAP_MEM_GUARD_BYTE)
+		{
+			EAP_TRACE_ERROR(
+				m_am_tools,
+				TRACE_FLAGS_DEFAULT,
+				(EAPL("ERROR: check_guard_bytes(): buffer overflow in byte %d."),
+				ind));
+			EAP_ASSERT_ANYWAY_TOOLS(m_am_tools);
+			return false;
+		}
+	}
+	return true;
+}
+
+//-----------------------------------------------------------------------------
+
+EAP_FUNC_EXPORT abs_eap_am_tools_c * eap_buf_chain_base_c::get_am_tools()
+{
+	return m_am_tools;
+}
+
+//-----------------------------------------------------------------------------
+
+EAP_FUNC_EXPORT bool eap_buf_chain_base_c::check_guards() const
+{
+
+#if defined(_DEBUG)
+	if (m_data == 0
+		|| m_data->m_buffer == 0)
+	{
+		return false;
+	}
+
+	if (m_data->m_buffer->get_is_writable() == true)
+	{
+		const u8_t * const buffer = m_data->m_buffer->get_data(
+			m_data->m_buffer->get_data_length());
+
+		if (buffer == 0)
+		{
+			return true;
+		}
+
+		if (check_guard_bytes(buffer) == false
+			|| check_guard_bytes(
+				buffer+(m_data->m_buffer->get_buffer_length()
+						- m_data->m_mem_guard_length)) == false
+			/* || check_guard_bytes(buffer+(m_data->m_real_data_length
+			   - m_data->m_mem_guard_length)) == false */)
+		{
+			EAP_TRACE_ERROR(
+				m_am_tools,
+				TRACE_FLAGS_DEFAULT,
+				(EAPL("ERROR: check_guard_bytes(): buffer overflow, buffer 0x%08x."),
+				buffer - m_data->m_mem_guard_length));
+			EAP_ASSERT_ANYWAY_TOOLS(m_am_tools);
+			return false;
+		}
+	}
+#endif //#if defined(_DEBUG)
+
+	return true;
+}
+
+//-----------------------------------------------------------------------------
+
+EAP_FUNC_EXPORT eap_buf_chain_base_c::~eap_buf_chain_base_c()
+{
+	if (m_data != 0)
+	{
+		check_guards();
+
+		delete m_data->m_buffer;
+		m_data->m_buffer = 0;
+	}
+
+	delete m_data;
+	m_data = 0;
+}
+
+//-----------------------------------------------------------------------------
+
+EAP_FUNC_EXPORT eap_buf_chain_base_c::eap_buf_chain_base_c(
+	const eap_write_buffer_e, 
+	abs_eap_am_tools_c * const tools,
+	u8_t * const data, 
+	const u32_t data_length, 
+	const bool reset_data,
+	const bool free_buffer, 
+	const u32_t mem_guard_length)
+		: m_am_tools(tools)
+		, m_data(0)
+{
+	eap_status_e status = initialize(mem_guard_length);
+	if (status != eap_status_ok)
+	{
+		if (free_buffer == true)
+		{
+			delete [] data;
+		}
+		return;
+	}
+
+	EAP_ASSERT_TOOLS(m_am_tools, m_data != 0);
+
+	if (m_data == 0
+		|| m_data->m_buffer == 0)
+	{
+		if (free_buffer == true)
+		{
+			delete [] data;
+		}
+		return;
+	}
+
+	status = m_data->m_buffer->set_buffer(
+		data,
+		data_length,
+		free_buffer,
+		true);
+	if (status != eap_status_ok)
+	{
+		if (free_buffer == true)
+		{
+			delete [] data;
+		}
+		m_data->m_is_valid = false;
+		EAP_TRACE_END(m_am_tools, TRACE_FLAGS_DEFAULT);
+		return;
+	}
+
+	EAP_ASSERT_TOOLS(m_am_tools, data_length >= m_data->m_mem_guard_length);
+	m_data->m_buffer->set_data_length(data_length - m_data->m_mem_guard_length);
+
+	set_mem_guard_bytes();
+
+	if (reset_data == true)
+	{
+		reset_data_buffer();
+	}
+}
+
+//-----------------------------------------------------------------------------
+
+EAP_FUNC_EXPORT eap_buf_chain_base_c::eap_buf_chain_base_c(
+	const eap_read_buffer_e,
+	abs_eap_am_tools_c * const tools,
+	const u8_t * const data, 
+	const u32_t data_length,
+	const bool free_buffer)
+		: m_am_tools(tools)
+		, m_data(0)
+{
+	eap_status_e status = initialize(0ul);
+	if (status != eap_status_ok)
+	{
+		return;
+	}
+
+	EAP_ASSERT_TOOLS(m_am_tools, m_data != 0);
+
+	if (m_data == 0
+		|| m_data->m_buffer == 0)
+	{
+		return;
+	}
+
+	status = m_data->m_buffer->set_buffer(
+		data,
+		data_length,
+		free_buffer,
+		false);
+	if (status != eap_status_ok)
+	{
+		m_data->m_is_valid = false;
+		EAP_TRACE_END(m_am_tools, TRACE_FLAGS_DEFAULT);
+		return;
+	}
+}
+
+//-----------------------------------------------------------------------------
+
+EAP_FUNC_EXPORT eap_buf_chain_base_c::eap_buf_chain_base_c(
+	const eap_write_buffer_e,
+	abs_eap_am_tools_c * const tools,
+	const u32_t data_length)
+		: m_am_tools(tools)
+		, m_data(0)
+{
+	eap_status_e status = initialize(EAP_MEM_GUARD_LENGTH);
+	if (status != eap_status_ok)
+	{
+		return;
+	}
+
+	EAP_ASSERT_TOOLS(m_am_tools, m_data != 0);
+
+	if (m_data == 0
+		|| m_data->m_buffer == 0)
+	{
+		return;
+	}
+
+	status = m_data->m_buffer->init(data_length+2*m_data->m_mem_guard_length);
+	if (status == eap_status_ok)
+	{
+		m_data->m_buffer->set_is_valid();
+		m_data->m_buffer->set_data_length(m_data->m_mem_guard_length);
+		set_mem_guard_bytes();
+	}
+	else
+	{
+		m_data->m_is_valid = false;
+	}
+}
+
+//-----------------------------------------------------------------------------
+
+EAP_FUNC_EXPORT eap_buf_chain_base_c::eap_buf_chain_base_c(
+	const eap_read_buffer_e,
+	abs_eap_am_tools_c * const tools,
+	const u32_t data_length)
+		: m_am_tools(tools)
+		, m_data(0)
+{
+	eap_status_e status = initialize(EAP_MEM_GUARD_LENGTH);
+	if (status != eap_status_ok)
+	{
+		return;
+	}
+
+	EAP_ASSERT_TOOLS(m_am_tools, m_data != 0);
+
+	if (m_data == 0
+		|| m_data->m_buffer == 0)
+	{
+		return;
+	}
+
+	if (data_length > 0ul)
+	{
+		status = m_data->m_buffer->init(data_length+2*m_data->m_mem_guard_length);
+		if (status == eap_status_ok)
+		{
+			m_data->m_buffer->set_is_valid();
+			m_data->m_buffer->set_data_length(m_data->m_mem_guard_length);
+			set_mem_guard_bytes();
+		}
+		else
+		{
+			m_data->m_is_valid = false;
+		}
+	}
+}
+
+//-----------------------------------------------------------------------------
+
+EAP_FUNC_EXPORT eap_status_e eap_buf_chain_base_c::initialize(
+	const u32_t mem_guard_length)
+{
+	m_data = new eap_buf_chain_base_impl_str;
+	if (m_data == 0)
+	{
+		return EAP_STATUS_RETURN(m_am_tools, eap_status_allocation_error);
+	}
+
+	m_data->m_mem_guard_length = mem_guard_length;
+	m_data->m_buffer = 0;
+	m_data->m_next_buffer = 0;
+	m_data->m_random_error_type = eap_random_error_type_none_keep_this_last_case;
+	m_data->m_send_packet_index = 0ul;
+	m_data->m_stack_address = 0;
+	m_data->m_is_valid = false;
+	m_data->m_is_manipulated = false;
+	m_data->m_do_packet_retransmission = EAP_BUFFER_DO_PACKET_RETRANSMISSION_INIT_VALUE;
+	m_data->m_is_client = true;
+	m_data->m_do_length_checks = false;
+	m_data->m_encrypt = false;
+
+	m_data->m_buffer = new eap_variable_data_c(m_am_tools);
+	if (m_data->m_buffer == 0
+		|| m_data->m_buffer->get_is_valid() == false)
+	{
+		delete m_data;
+		m_data = 0;
+		return EAP_STATUS_RETURN(m_am_tools, eap_status_allocation_error);
+	}
+
+	m_data->m_is_valid = true;
+
+	return EAP_STATUS_RETURN(m_am_tools, eap_status_ok);
+}
+
+//-----------------------------------------------------------------------------
+
+EAP_FUNC_EXPORT void eap_buf_chain_base_c::reset_data_buffer()
+{
+	if (m_data == 0
+		|| m_data->m_buffer == 0)
+	{
+		return;
+	}
+
+	m_am_tools->memset(
+		get_data(get_data_length()),
+		0,
+		get_data_length());
+}
+
+//-----------------------------------------------------------------------------
+
+EAP_FUNC_EXPORT void eap_buf_chain_base_c::set_mem_guard_bytes()
+{
+	EAP_ASSERT_TOOLS(
+		m_am_tools,
+		m_data != 0);
+	EAP_ASSERT_TOOLS(
+		m_am_tools,
+		m_data->m_buffer->get_buffer_length()
+		>= m_data->m_mem_guard_length);
+	EAP_ASSERT_TOOLS(
+		m_am_tools,
+		m_data->m_buffer->get_data_length()
+		>= m_data->m_mem_guard_length);
+
+	if (m_data == 0
+		|| m_data->m_buffer == 0)
+	{
+		return;
+	}
+
+	u8_t * const buffer = m_data->m_buffer->get_data(m_data->m_buffer->get_data_length());
+
+	m_am_tools->memset(
+		buffer,
+		EAP_MEM_GUARD_BYTE,
+		m_data->m_mem_guard_length);
+
+	m_am_tools->memset(
+		buffer+(m_data->m_buffer->get_buffer_length() - m_data->m_mem_guard_length),
+		EAP_MEM_GUARD_BYTE,
+		m_data->m_mem_guard_length);
+
+	m_am_tools->memset(
+		buffer+(m_data->m_buffer->get_data_length()),
+		EAP_MEM_GUARD_BYTE,
+		m_data->m_mem_guard_length);
+}
+
+//-----------------------------------------------------------------------------
+
+EAP_FUNC_EXPORT u32_t eap_buf_chain_base_c::get_mem_guard_length()
+{
+	EAP_ASSERT_TOOLS(m_am_tools, m_data != 0);
+
+	if (m_data == 0)
+	{
+		return 0;
+	}
+
+	return m_data->m_mem_guard_length;
+}
+
+//-----------------------------------------------------------------------------
+
+EAP_FUNC_EXPORT u32_t eap_buf_chain_base_c::get_buffer_length() const
+{
+	EAP_ASSERT_TOOLS(
+		m_am_tools,
+		m_data != 0);
+	EAP_ASSERT_TOOLS(
+		m_am_tools,
+		m_data->m_buffer->get_buffer_length()
+		>= 2ul*m_data->m_mem_guard_length);
+
+	if (m_data == 0
+		|| m_data->m_buffer == 0)
+	{
+		return 0;
+	}
+
+	return m_data->m_buffer->get_buffer_length() - 2ul*m_data->m_mem_guard_length;
+}
+
+//-----------------------------------------------------------------------------
+
+EAP_FUNC_EXPORT u32_t eap_buf_chain_base_c::get_data_length() const
+{
+	EAP_ASSERT_TOOLS(
+		m_am_tools,
+		m_data != 0);
+	EAP_ASSERT_TOOLS(
+		m_am_tools,
+		m_data->m_buffer->get_data_length()
+		>= m_data->m_mem_guard_length);
+
+	if (m_data == 0
+		|| m_data->m_buffer == 0)
+	{
+		return 0;
+	}
+
+	return m_data->m_buffer->get_data_length() - m_data->m_mem_guard_length;
+}
+
+//-----------------------------------------------------------------------------
+
+EAP_FUNC_EXPORT u8_t * eap_buf_chain_base_c::get_data_offset(
+	const u32_t p_offset,
+	const u32_t p_continuous_bytes) const
+{
+	EAP_ASSERT_TOOLS(
+		m_am_tools,
+		m_data != 0);
+	EAP_ASSERT_TOOLS(
+		m_am_tools,
+		m_data->m_buffer->get_data_length() >= m_data->m_mem_guard_length);
+
+	if (m_data == 0
+		|| m_data->m_buffer == 0)
+	{
+		return 0;
+	}
+
+	if (p_offset+p_continuous_bytes <= get_buffer_length())
+	{
+		return m_data->m_buffer->get_buffer_offset(
+			p_offset + m_data->m_mem_guard_length,
+			p_continuous_bytes);
+	}
+	else
+	{
+		EAP_TRACE_ERROR(
+			m_am_tools,
+			TRACE_FLAGS_DEFAULT,
+			(EAPL("ERROR: Fragments are not supported yet.\n")));
+		EAP_ASSERT_ALWAYS_TOOLS(
+			m_am_tools,
+			p_offset+p_continuous_bytes <= get_data_length());
+		return 0;
+	}
+}
+
+//-----------------------------------------------------------------------------
+
+EAP_FUNC_EXPORT u8_t * eap_buf_chain_base_c::get_data(
+	const u32_t p_continuous_bytes) const
+{
+	EAP_ASSERT_TOOLS(m_am_tools, m_data != 0);
+
+	if (m_data == 0
+		|| m_data->m_buffer == 0)
+	{
+		return 0;
+	}
+
+	return get_data_offset(0u, p_continuous_bytes);
+}
+
+//-----------------------------------------------------------------------------
+
+EAP_FUNC_EXPORT eap_status_e eap_buf_chain_base_c::set_buffer_length(
+	const u32_t buffer_length)
+{
+	EAP_ASSERT_TOOLS(m_am_tools, m_data != 0);
+	EAP_ASSERT_TOOLS(m_am_tools, m_data->m_buffer != 0);
+
+	if (m_data == 0
+		|| m_am_tools == 0
+		|| m_am_tools->get_is_valid() == false)
+	{
+		return eap_status_allocation_error;
+	}
+
+	if (m_data->m_buffer == 0)
+	{
+		return EAP_STATUS_RETURN(m_am_tools, eap_status_allocation_error);
+	}
+
+	m_data->m_buffer->reset();
+
+	eap_status_e status = m_data->m_buffer->init(buffer_length+2*m_data->m_mem_guard_length);
+	if (status == eap_status_ok)
+	{
+		m_data->m_buffer->set_is_valid();
+		m_data->m_buffer->set_data_length(m_data->m_mem_guard_length);
+		set_mem_guard_bytes();
+	}
+
+	return EAP_STATUS_RETURN(m_am_tools, status);
+}
+
+//-----------------------------------------------------------------------------
+
+EAP_FUNC_EXPORT eap_status_e eap_buf_chain_base_c::set_data_length(
+	const u32_t length)
+{
+	EAP_ASSERT_TOOLS(m_am_tools, m_data != 0);
+	EAP_ASSERT_TOOLS(m_am_tools, m_data->m_buffer != 0);
+	EAP_ASSERT_TOOLS(m_am_tools, m_data->m_buffer->get_is_writable() == true);
+
+	if (m_data == 0
+		|| m_am_tools == 0
+		|| m_am_tools->get_is_valid() == false)
+	{
+		return eap_status_allocation_error;
+	}
+
+	if (m_data->m_buffer == 0)
+	{
+		return EAP_STATUS_RETURN(m_am_tools, eap_status_allocation_error);
+	}
+
+	check_guards();
+
+	if (get_buffer_length() > length)
+	{
+		// Here we must reset the memory guard bytes because not all of the buffer is used.
+		EAP_ASSERT_TOOLS(
+			m_am_tools,
+			m_data->m_buffer->get_data_length()
+			>= m_data->m_mem_guard_length);
+
+		u8_t * const buffer = m_data->m_buffer->get_data_offset(
+			m_data->m_mem_guard_length,
+			m_data->m_buffer->get_data_length() - m_data->m_mem_guard_length);
+		if (buffer == 0)
+		{
+			return EAP_STATUS_RETURN(m_am_tools, eap_status_buffer_too_short);
+		}
+
+		m_am_tools->memset(
+			buffer+length,
+			EAP_MEM_GUARD_BYTE,
+			m_data->m_mem_guard_length);
+	}
+
+	m_data->m_buffer->set_data_length(length + m_data->m_mem_guard_length);
+
+	return EAP_STATUS_RETURN(m_am_tools, eap_status_ok);
+}
+
+//-----------------------------------------------------------------------------
+
+EAP_FUNC_EXPORT bool eap_buf_chain_base_c::get_is_valid() const
+{
+	if (m_data == 0)
+	{
+		return false;
+	}
+
+	return m_data->m_is_valid;
+}
+
+//--------------------------------------------------
+
+EAP_FUNC_EXPORT bool eap_buf_chain_base_c::get_is_valid_data() const
+{
+	if (m_data == 0)
+	{
+		return false;
+	}
+
+	if (m_data->m_is_valid == false)
+	{
+		return false;
+	}
+
+	// Note the buffer could be empty.
+	if (m_data->m_buffer == 0)
+	{
+		return false;
+	}
+
+	return true;
+}
+
+//-----------------------------------------------------------------------------
+
+EAP_FUNC_EXPORT void eap_buf_chain_base_c::set_is_manipulated()
+{
+	EAP_ASSERT_TOOLS(m_am_tools, m_data != 0);
+
+	if (m_data == 0)
+	{
+		return;
+	}
+
+	m_data->m_is_manipulated = true;
+}
+
+//-----------------------------------------------------------------------------
+
+EAP_FUNC_EXPORT bool eap_buf_chain_base_c::get_is_manipulated()
+{
+	EAP_ASSERT_TOOLS(m_am_tools, m_data != 0);
+
+	if (m_data == 0)
+	{
+		return false;
+	}
+
+	return m_data->m_is_manipulated;
+}
+
+//-----------------------------------------------------------------------------
+
+EAP_FUNC_EXPORT void eap_buf_chain_base_c::set_send_packet_index(const u32_t send_packet_index)
+{
+	EAP_ASSERT_TOOLS(m_am_tools, m_data != 0);
+
+	if (m_data == 0)
+	{
+		return;
+	}
+
+	m_data->m_send_packet_index = send_packet_index;
+}
+
+//-----------------------------------------------------------------------------
+
+EAP_FUNC_EXPORT u32_t eap_buf_chain_base_c::get_send_packet_index()
+{
+	EAP_ASSERT_TOOLS(m_am_tools, m_data != 0);
+
+	if (m_data == 0)
+	{
+		return 0;
+	}
+
+	return m_data->m_send_packet_index;
+}
+
+//-----------------------------------------------------------------------------
+
+EAP_FUNC_EXPORT void eap_buf_chain_base_c::set_random_error_type(
+	eap_random_error_type error_type)
+{
+	EAP_ASSERT_TOOLS(m_am_tools, m_data != 0);
+
+	if (m_data == 0)
+	{
+		return;
+	}
+
+	m_data->m_random_error_type = error_type;
+}
+
+//-----------------------------------------------------------------------------
+
+EAP_FUNC_EXPORT eap_random_error_type eap_buf_chain_base_c::get_random_error_type()
+{
+	EAP_ASSERT_TOOLS(m_am_tools, m_data != 0);
+
+	if (m_data == 0)
+	{
+		return eap_random_error_type_manipulate_byte;
+	}
+
+	return m_data->m_random_error_type;
+}
+
+//-----------------------------------------------------------------------------
+
+EAP_FUNC_EXPORT void eap_buf_chain_base_c::set_do_packet_retransmission(
+	const bool do_packet_retransmission_when_true)
+{
+	EAP_ASSERT_TOOLS(m_am_tools, m_data != 0);
+
+	if (m_data == 0)
+	{
+		return;
+	}
+
+	m_data->m_do_packet_retransmission = do_packet_retransmission_when_true;
+}
+
+//-----------------------------------------------------------------------------
+
+EAP_FUNC_EXPORT bool eap_buf_chain_base_c::get_do_packet_retransmission()
+{
+	EAP_ASSERT_TOOLS(m_am_tools, m_data != 0);
+
+	if (m_data == 0)
+	{
+		return false;
+	}
+
+	return m_data->m_do_packet_retransmission;
+}
+
+//-----------------------------------------------------------------------------
+
+EAP_FUNC_EXPORT void eap_buf_chain_base_c::set_is_client(const bool is_client_when_true)
+{
+	m_data->m_is_client = is_client_when_true;
+}
+
+//-----------------------------------------------------------------------------
+
+EAP_FUNC_EXPORT bool eap_buf_chain_base_c::get_is_client() const
+{
+	return m_data->m_is_client;
+}
+
+//-----------------------------------------------------------------------------
+
+EAP_FUNC_EXPORT void eap_buf_chain_base_c::set_do_length_checks(const bool do_length_checks)
+{
+	m_data->m_do_length_checks = do_length_checks;
+}
+
+EAP_FUNC_EXPORT bool eap_buf_chain_base_c::get_do_length_checks() const
+{
+	return m_data->m_do_length_checks;
+}
+
+//-----------------------------------------------------------------------------
+
+EAP_FUNC_EXPORT void eap_buf_chain_base_c::set_encrypt(const bool encrypt_when_true)
+{
+	m_data->m_encrypt = encrypt_when_true;
+}
+
+EAP_FUNC_EXPORT bool eap_buf_chain_base_c::get_encrypt() const
+{
+	return m_data->m_encrypt;
+}
+
+//-----------------------------------------------------------------------------
+
+EAP_FUNC_EXPORT void eap_buf_chain_base_c::set_stack_address(const void * const stack_address)
+{
+	m_data->m_stack_address = stack_address;
+}
+
+EAP_FUNC_EXPORT const void * eap_buf_chain_base_c::get_stack_address() const
+{
+	return m_data->m_stack_address; 
+}
+
+//-----------------------------------------------------------------------------
+
+EAP_FUNC_EXPORT eap_status_e eap_buf_chain_base_c::add_data(
+	const void * const buffer,
+	const u32_t buffer_length)
+{
+	EAP_ASSERT_TOOLS(m_am_tools, m_data != 0);
+
+	if (m_data == 0
+		|| m_am_tools == 0
+		|| m_am_tools->get_is_valid() == false)
+	{
+		return eap_status_allocation_error;
+	}
+
+	eap_status_e status = add_data_to_offset(
+		get_data_length(),
+		buffer,
+		buffer_length);
+	return EAP_STATUS_RETURN(m_am_tools, status);
+}
+
+//-----------------------------------------------------------------------------
+
+EAP_FUNC_EXPORT eap_status_e eap_buf_chain_base_c::add_data(
+	const eap_variable_data_c * const buffer)
+{
+	EAP_ASSERT_TOOLS(m_am_tools, m_data != 0);
+
+	if (m_data == 0
+		|| m_am_tools == 0
+		|| m_am_tools->get_is_valid() == false)
+	{
+		return eap_status_allocation_error;
+	}
+
+	return EAP_STATUS_RETURN(m_am_tools, add_data(
+		buffer->get_data(buffer->get_data_length()),
+		buffer->get_data_length()));
+}
+
+//-----------------------------------------------------------------------------
+
+EAP_FUNC_EXPORT eap_status_e eap_buf_chain_base_c::add_data_to_offset(
+	const u32_t offset,
+	const void * const buffer,
+	const u32_t buffer_length)
+{
+	EAP_ASSERT_TOOLS(m_am_tools, m_data != 0);
+
+	if (m_data == 0
+		|| m_am_tools == 0
+		|| m_am_tools->get_is_valid() == false)
+	{
+		return eap_status_allocation_error;
+	}
+
+	eap_status_e status = m_data->m_buffer->add_data_to_offset(
+		m_data->m_mem_guard_length+offset,
+		buffer,
+		buffer_length);
+
+	return EAP_STATUS_RETURN(m_am_tools, status);
+}
+
+//-----------------------------------------------------------------------------
+
+EAP_FUNC_EXPORT eap_status_e eap_buf_chain_base_c::add_data_to_offset(
+	const u32_t offset,
+	const eap_variable_data_c * const buffer)
+{
+	EAP_ASSERT_TOOLS(m_am_tools, m_data != 0);
+
+	if (m_data == 0
+		|| m_am_tools == 0
+		|| m_am_tools->get_is_valid() == false)
+	{
+		return eap_status_allocation_error;
+	}
+
+	eap_status_e status = m_data->m_buffer->add_data_to_offset(
+		m_data->m_mem_guard_length+offset,
+		buffer->get_data(buffer->get_data_length()),
+		buffer->get_data_length());
+
+	return EAP_STATUS_RETURN(m_am_tools, status);
+}
+
+
+//-----------------------------------------------------------------------------
+//-----------------------------------------------------------------------------
+//-----------------------------------------------------------------------------
+
+EAP_FUNC_EXPORT eap_buf_chain_wr_c::~eap_buf_chain_wr_c()
+{
+}
+
+//-----------------------------------------------------------------------------
+
+EAP_FUNC_EXPORT eap_buf_chain_wr_c::eap_buf_chain_wr_c(
+	const eap_write_buffer_e,
+	abs_eap_am_tools_c * const tools,
+	u8_t * const data,
+	const u32_t data_length,
+	const bool reset_data,
+	const bool free_buffer,
+	const u32_t mem_guard_length)
+	: eap_buf_chain_base_c(
+		eap_write_buffer,
+		tools,
+		data,
+		data_length,
+		reset_data,
+		free_buffer,
+		mem_guard_length)
+{
+}
+
+//-----------------------------------------------------------------------------
+
+EAP_FUNC_EXPORT eap_buf_chain_wr_c::eap_buf_chain_wr_c(
+	const eap_write_buffer_e,
+	abs_eap_am_tools_c * const tools,
+	const u32_t data_length)
+	: eap_buf_chain_base_c(eap_write_buffer, tools, data_length)
+{
+}
+
+//-----------------------------------------------------------------------------
+
+EAP_FUNC_EXPORT eap_buf_chain_wr_c::eap_buf_chain_wr_c(
+	const eap_write_buffer_e,
+	abs_eap_am_tools_c * const tools)
+	: eap_buf_chain_base_c(eap_write_buffer, tools, 0ul)
+{
+}
+
+//-----------------------------------------------------------------------------
+
+EAP_FUNC_EXPORT void eap_buf_chain_wr_c::force_inheritance()
+{
+}
+
+//-----------------------------------------------------------------------------
+
+EAP_FUNC_EXPORT u8_t * eap_buf_chain_wr_c::get_ethernet_header()
+{
+	return static_cast<u8_t *>(
+		get_data(
+			eapol_ethernet_header_wr_c::get_header_length()));
+}
+
+//-----------------------------------------------------------------------------
+
+EAP_FUNC_EXPORT eap_buf_chain_wr_c * eap_buf_chain_wr_c::copy()
+{
+	if (get_is_valid() == false)
+	{
+		return 0;
+	}
+
+	u8_t *new_data = new u8_t[get_buffer_length()+(2u*get_mem_guard_length())];
+	
+	if (new_data == 0)
+	{
+		return 0;
+	}
+
+	get_am_tools()->memmove(
+		new_data+get_mem_guard_length(),
+		get_data(get_buffer_length()),
+		get_buffer_length());
+
+	eap_buf_chain_wr_c * const new_buffer
+		= new eap_buf_chain_wr_c(
+			eap_write_buffer,
+			get_am_tools(),
+			new_data,
+			get_buffer_length()+(2u*get_mem_guard_length()),
+			false, // Do not init data
+			true, // Free buffer on destructor
+			get_mem_guard_length());
+
+	if (new_buffer == 0
+		|| new_buffer->get_is_valid_data() == false)
+	{
+		delete new_buffer;
+		return 0;
+	}
+
+	new_buffer->set_data_length(get_data_length());
+
+	new_buffer->set_send_packet_index(get_send_packet_index());
+	new_buffer->set_random_error_type(get_random_error_type());
+	new_buffer->set_stack_address(get_stack_address());
+	new_buffer->set_is_client(get_is_client());
+
+	return new_buffer;
+}
+
+//-----------------------------------------------------------------------------
+//-----------------------------------------------------------------------------
+//-----------------------------------------------------------------------------
+
+EAP_FUNC_EXPORT eap_buf_chain_rd_c::~eap_buf_chain_rd_c()
+{
+	check_guards();
+}
+
+//-----------------------------------------------------------------------------
+
+EAP_FUNC_EXPORT eap_buf_chain_rd_c::eap_buf_chain_rd_c(
+	const eap_read_buffer_e, 
+	abs_eap_am_tools_c * const tools,
+	const u8_t * const data, 
+	const u32_t data_length,
+	const bool free_buffer)
+		: eap_buf_chain_base_c(
+			eap_read_buffer,
+			tools,
+			data,
+			data_length,
+			free_buffer)
+{
+}
+
+//-----------------------------------------------------------------------------
+
+EAP_FUNC_EXPORT eap_buf_chain_rd_c::eap_buf_chain_rd_c(
+	const eap_read_buffer_e,
+	abs_eap_am_tools_c * const tools,
+	const u32_t data_length)
+	: eap_buf_chain_base_c(eap_read_buffer, tools, data_length)
+{
+}
+
+//-----------------------------------------------------------------------------
+
+EAP_FUNC_EXPORT void eap_buf_chain_rd_c::force_inheritance()
+{
+}
+
+//-----------------------------------------------------------------------------
+
+EAP_FUNC_EXPORT const u8_t * eap_buf_chain_rd_c::get_data(
+	const u32_t p_continuous_bytes) const
+{
+	return static_cast<const u8_t *>(
+		eap_buf_chain_base_c::get_data(p_continuous_bytes));
+}
+
+//-----------------------------------------------------------------------------
+
+EAP_FUNC_EXPORT const u8_t * eap_buf_chain_rd_c::get_data_offset(
+	const u32_t p_offset,
+	const u32_t p_continuous_bytes) const
+{
+	return static_cast<const u8_t *>(
+		eap_buf_chain_base_c::get_data_offset(
+			p_offset,
+			p_continuous_bytes));
+}
+
+//-----------------------------------------------------------------------------
+
+EAP_FUNC_EXPORT const u8_t * eap_buf_chain_rd_c::get_ethernet_header() const
+{
+	return static_cast<const u8_t *>(
+		get_data(
+			eapol_ethernet_header_rd_c::get_header_length()));
+}
+
+//-----------------------------------------------------------------------------
+
+
+
+
+// End.