/*

* 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.

*

*/

/*

* %version: 17 %

*/

#if !defined(_EAP_CORE_SERVER_MESSAGE_IF_H_)

#define _EAP_CORE_SERVER_MESSAGE_IF_H_

#include "eap_tools.h"

#include "eap_am_export.h"

#include "abs_eap_session_core.h"

#include "eap_variable_data.h"

#include "abs_eap_am_mutex.h"

#include "eap_session_core_base.h"

#include "abs_eap_am_message_if.h"

#include "eap_am_message_if.h"

#include "eap_process_tlv_message_data.h"

#include "abs_eap_am_stack.h"

#include "eap_am_stack.h"

#if defined(USE_EAP_SIMPLE_CONFIG)

#include "simple_config_types.h"

#include "simple_config_credential.h"

#include "simple_config_payloads.h"

#include "abs_eap_configuration_if.h"

#endif // #if defined(USE_EAP_SIMPLE_CONFIG)

/** @file */

/// A eap_core_server_message_if_c class implements the basic functionality of EAPOL.

class EAP_EXPORT eap_core_server_message_if_c

: public abs_eap_session_core_c

, public eap_am_message_if_c

, public abs_eap_base_timer_c

, public abs_eap_am_stack_c

{

private:

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

	/// This is back pointer to object which created this object.

	abs_eap_am_message_if_c * m_partner;

	/// This is pointer to the eap_core object. The eapol_core object gives

	/// the received packets to the eap_core object. The eap_core object sends

	/// packets through the eapol_core object.

	eap_session_core_base_c * const m_eap_core;

	eap_am_stack_c * const m_am_stack;

	/// This is pointer to the tools class.

	abs_eap_am_tools_c * const m_am_tools;

	/// This is offset in bytes of the EAP header.

	u32_t m_eap_header_offset;

	/// This is maximum transfer unit in bytes.

	u32_t m_MTU;

	/// This is length of the trailer in bytes.

	u32_t m_trailer_length;

	eap_status_e m_error_code;

	eap_tlv_message_type_function_e m_error_function;

	/// This indicates whether this object is client (true) or server (false).

	/// In terms of EAP-protocol whether this network entity is EAP-supplicant (true) or EAP-authenticator (false).

	bool m_is_client;

	/// This indicates whether this object was generated successfully.

	bool m_is_valid;

	bool m_shutdown_was_called;

	eap_status_e send_error_message(

		const eap_status_e error_code,

		const eap_tlv_message_type_function_e function);

	eap_status_e send_message(eap_process_tlv_message_data_c * const message);

	eap_status_e process_message_type_error(

		EAP_TEMPLATE_CONST eap_array_c<eap_tlv_header_c> * const parameters);

	eap_status_e process_message(eap_process_tlv_message_data_c * const message);

	eap_status_e create_eap_session(

		EAP_TEMPLATE_CONST eap_array_c<eap_tlv_header_c> * const parameters);

	eap_status_e remove_eap_session(

		EAP_TEMPLATE_CONST eap_array_c<eap_tlv_header_c> * const parameters);

	eap_status_e send_eap_identity_request(

		EAP_TEMPLATE_CONST eap_array_c<eap_tlv_header_c> * const parameters);

	eap_status_e packet_process(

		EAP_TEMPLATE_CONST eap_array_c<eap_tlv_header_c> * const parameters);

	eap_status_e eap_acknowledge(

		EAP_TEMPLATE_CONST eap_array_c<eap_tlv_header_c> * const parameters);

	eap_status_e set_eap_database_reference_values(

		EAP_TEMPLATE_CONST eap_array_c<eap_tlv_header_c> * const parameters);

	eap_status_e eap_mtu(

		EAP_TEMPLATE_CONST eap_array_c<eap_tlv_header_c> * const parameters);

	eap_status_e get_802_11_authentication_mode(

		EAP_TEMPLATE_CONST eap_array_c<eap_tlv_header_c> * const parameters);

	eap_status_e complete_remove_eap_session(

		const bool complete_to_lower_layer,

		const eap_am_network_id_c * const receive_network_id);

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

protected:

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

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

public:

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

	/**

	 * The destructor deletes the m_eap_core object.

	 */

	EAP_FUNC_IMPORT virtual ~eap_core_server_message_if_c();

	/**

	 * The constructor creates the eap_core object and initializes the m_eap_core

	 * to point the eap_core object.

	 * @param tools is pointer to the tools class. @see abs_eap_am_tools_c.

	 * @param partner is back pointer to object which created this object.

	 * @param is_client_when_true indicates whether the network entity should act

	 * as a client (true) or server (false), in terms of EAP-protocol whether

	 * this network entity is EAP-supplicant (true) or EAP-authenticator (false).

	 */

	EAP_FUNC_IMPORT eap_core_server_message_if_c(

		abs_eap_am_tools_c * const tools,

		const bool is_client_when_true,

		const u32_t MTU);

	EAP_FUNC_IMPORT void set_partner(abs_eap_am_message_if_c * const partner);

	EAP_FUNC_IMPORT eap_status_e process_data(const void * const data, const u32_t length);

	/**

	 * The class could send packets to partner class with this function.

	 * eap_core_server_message_if_c adds EAPOL header to the send packet.

	 * @param send_network_id carries the addresses (network identity) and type of the packet.

	 * @param sent_packet includes the buffer for the whole packet and initialized 

	 * EAP-packet in correct offset.

	 * @param header_offset is offset of the EAP-header within the sent_packet.

	 * @param data_length is length in bytes of the EAP-packet.

	 * @param buffer_length is length in bytes of the whole packet buffer.

	 */

	EAP_FUNC_IMPORT eap_status_e packet_send(

		const eap_am_network_id_c * const send_network_id,

		eap_buf_chain_wr_c * const sent_packet,

		const u32_t header_offset,

		const u32_t data_length,

		const u32_t buffer_length); 

	/**

	 * The get_header_offset() function obtains the header offset of EAP-packet.

	 * @param MTU_length is pointer to variable to store the maximum transfer unit (MTU).

	 * MTU is the maximum EAP-packet length in bytes

	 * @param trailer_length is pointer to the variable to store length

	 * of trailer needed by lower levels.

	 * @return Function returns the offset of EAP-header.

	 * @see abs_eap_core_c::get_header_offset().

	 */

	EAP_FUNC_IMPORT u32_t get_header_offset(

		u32_t * const MTU,

		u32_t * const trailer_length);

	/**

	 * The load_module() function function indicates the lower level to

	 * load new module of EAP-type.

	 * @see abs_eap_core_c::load_module().

	 */

	EAP_FUNC_IMPORT eap_status_e load_module(

		const eap_type_value_e type,

		const eap_type_value_e /* tunneling_type */,

		abs_eap_base_type_c * const partner,

		eap_base_type_c ** const eap_type,

		const bool is_client_when_true,

		const eap_am_network_id_c * const receive_network_id);

	/**

	 * The unload_module() function unloads the module of a EAP-type. 

	 * @see abs_eap_core_c::unload_module().

	 */

	EAP_FUNC_IMPORT eap_status_e unload_module(

		const eap_type_value_e type); 

	/**

	 * Note this function is just an example. Parameters will change later.

	 * The packet_data_crypto_keys() function gives the generated keys to lower level.

	 * After EAP-authentication has generated the keys it calls this function

	 * to offer the keys to lower level.

	 * @see abs_eap_base_type_c::packet_data_crypto_keys().

	 */

	EAP_FUNC_IMPORT eap_status_e packet_data_crypto_keys(

		const eap_am_network_id_c * const send_network_id,

		const eap_master_session_key_c * const master_session_key

		);

	// This is documented in abs_eap_stack_interface_c::configure().

	EAP_FUNC_IMPORT eap_status_e configure(

		const eap_variable_data_c * const client_configuration);

	// This is documented in abs_eap_stack_interface_c::shutdown().

	EAP_FUNC_IMPORT eap_status_e shutdown();

	/**

	 * The read_configure() function reads the configuration data identified

	 * by the field string of field_length bytes length. Adaptation module must direct

	 * the query to some persistent store.

	 * @see abs_eap_base_type_c::read_configure().

	 */

	EAP_FUNC_IMPORT eap_status_e read_configure(

		const eap_configuration_field_c * const field,

		eap_variable_data_c * const data);

	/**

	 * The write_configure() function writes the configuration data identified

	 * by the field string of field_length bytes length. Adaptation module must direct

	 * the action to some persistent store.

	 * @see abs_eap_base_type_c::write_configure().

	 */

	EAP_FUNC_IMPORT eap_status_e write_configure(

		const eap_configuration_field_c * const field,

		eap_variable_data_c * const data);

	// This is documented in abs_eap_stack_interface_c::set_is_valid().

	EAP_FUNC_IMPORT void set_is_valid();

	// This is documented in abs_eap_stack_interface_c::get_is_valid().

	EAP_FUNC_IMPORT bool get_is_valid();

	// See abs_eap_base_type_c::state_notification().

	EAP_FUNC_IMPORT void state_notification(

		const abs_eap_state_notification_c * const state);

	// See abs_eap_base_timer_c::timer_expired().

	EAP_FUNC_IMPORT eap_status_e timer_expired(

		const u32_t id, void *data);

	// See abs_eap_base_timer_c::timer_delete_data().

	EAP_FUNC_IMPORT eap_status_e timer_delete_data(

		const u32_t id, void *data);

	/**

	 * This function tells lower layer to remove EAP session object asyncronously.

	 * @param send_network_id is pointer to network id that identifies the removed EAP session.

	 */

	EAP_FUNC_IMPORT eap_status_e asynchronous_init_remove_eap_session(

		const eap_am_network_id_c * const send_network_id);

	/**

	 * The upper layer calls the asynchronous_start_authentication() function

	 * when EAP-authentication is needed with another peer.

	 * @see abs_eap_core_c::asynchronous_start_authentication().

	 */

	EAP_FUNC_IMPORT eap_status_e asynchronous_start_authentication(

		const eap_am_network_id_c * const /* receive_network_id */,

		const bool /* is_client_when_true */);

	EAP_FUNC_IMPORT eap_status_e restart_authentication(

		const eap_am_network_id_c * const send_network_id,

		const bool is_client_when_true,

		const bool force_clean_restart,

		const bool from_timer = false);

	//

	EAP_FUNC_IMPORT eap_status_e set_timer(

		abs_eap_base_timer_c * const p_initializer, 

		const u32_t p_id, 

		void * const p_data,

		const u32_t p_time_ms);

	EAP_FUNC_IMPORT eap_status_e cancel_timer(

		abs_eap_base_timer_c * const p_initializer, 

		const u32_t p_id);

	//

	EAP_FUNC_IMPORT eap_status_e check_is_valid_eap_type(const eap_type_value_e eap_type);

	// See abs_eap_core_c::get_eap_type_list().

	EAP_FUNC_IMPORT eap_status_e get_eap_type_list(

		eap_array_c<eap_type_value_e> * const eap_type_list);

	/// @see abs_eap_core_c::add_rogue_ap().

	EAP_FUNC_IMPORT eap_status_e add_rogue_ap(eap_array_c<eap_rogue_ap_entry_c> & rogue_ap_list);

	// This is documented in abs_eap_core_c::set_session_timeout().

	EAP_FUNC_IMPORT eap_status_e set_session_timeout(

		const u32_t session_timeout_ms);

#if defined(USE_EAP_SIMPLE_CONFIG)

	EAP_FUNC_IMPORT eap_status_e save_simple_config_session(

		const simple_config_state_e state,

		EAP_TEMPLATE_CONST eap_array_c<simple_config_credential_c> * const credential_array,

		const eap_variable_data_c * const new_password,

		const simple_config_Device_Password_ID_e Device_Password_ID,

		const simple_config_payloads_c * const other_configuration);

#endif // #if defined(USE_EAP_SIMPLE_CONFIG)

	EAP_FUNC_IMPORT eap_status_e complete_get_802_11_authentication_mode(

		const eap_status_e completion_status,

		const eap_am_network_id_c * const receive_network_id,

		const eapol_key_802_11_authentication_mode_e mode);

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

}; // class eap_core_server_message_if_c

#endif //#if !defined(_EAP_CORE_SERVER_MESSAGE_IF_H_)

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

// End.