/*

* 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.

*

*/

/*

*/

#if !defined(_ABS_EAPOL_CORE_H_)

#define _ABS_EAPOL_CORE_H_

#include "eap_am_types.h"

#include "eapol_key_state.h"

class eap_am_network_id_c;

class eapol_session_key_c;

class abs_eap_base_type_c;

class eap_rogue_ap_entry_c;

class eap_base_type_c;

/// The abs_eapol_core_c class defines the interface the eapol_core_c class

/// will use with the partner class.

/// Later eapol and ethernet could be integrated. Now I am too lazy.

class EAP_EXPORT abs_eapol_core_c

{

private:

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protected:

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

public:

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	/**

	 * The destructor does nothing special.

	 */

	virtual ~abs_eapol_core_c()

	{

	}

	/**

	 * The constructor does nothing special.

	 */

	abs_eapol_core_c()

	{

	}

	/**

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

	 * @see abs_eap_base_type_c::packet_send().

	 */

	virtual eap_status_e packet_send(

		const eap_am_network_id_c * const 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) = 0;

	/**

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

	 * @see abs_eap_base_type_c::get_header_offset().

	 */

	virtual u32_t get_header_offset(

		u32_t * const MTU,

		u32_t * const trailer_length) = 0;

	/**

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

	 * load new module of EAP-type.

	 * @see abs_eap_core_c::load_module().

	 */

	virtual 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) = 0;

	/**

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

	 * @param type is the requested EAP-type.

	 */

	virtual eap_status_e unload_module(

		const eap_type_value_e type) = 0;

	/**

	 * The packet_data_session_key() function passes one traffic encryption key to 

	 * the lower layers. Ultimately the key can end up to the WLAN hardware.

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

	 * @param key is the encryption key

	 * @param key_length is the length of the key

	 * @param key_type describes the type of the key (WEP or something else...)

	 * @param key_index is the index of the encryption key (there can be four broadcast keys in WEP for example)

	 */

	virtual eap_status_e packet_data_session_key(

		const eap_am_network_id_c * const send_network_id,

		const eapol_session_key_c * const key

		) = 0;

	/**

	 * 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().

	 */

	virtual eap_status_e read_configure(

		const eap_configuration_field_c * const field,

		eap_variable_data_c * const data) = 0;

	/**

	 * 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().

	 */

	virtual eap_status_e write_configure(

		const eap_configuration_field_c * const field,

		eap_variable_data_c * const data) = 0;

	/**

	 * This is notification of internal state transition.

	 * This is used for notifications, debugging and protocol testing.

	 * The primal notifications are eap_state_variable_e::eap_state_authentication_finished_successfully

	 * and eap_state_variable_e::eap_state_authentication_terminated_unsuccessfully.

	 * These two notifications are sent from EAP-protocol layer (eap_protocol_layer_e::eap_protocol_layer_eap).

	 */

	virtual void state_notification(

		const abs_eap_state_notification_c * const state) = 0;

	/**

	 * The set_timer() function initializes timer to be elapsed after p_time_ms milliseconds.

	 * @param initializer is pointer to object which timer_expired() function will

	 * be called after timer elapses.

	 * @param id is identifier which will be returned in timer_expired() function.

	 * The user selects and interprets the id for this timer.

	 * @param data is pointer to any user selected data which will be returned in timer_expired() function.

	 *

	 * Adaptation module internally implements the timer.

	 */

	virtual eap_status_e set_timer(

		abs_eap_base_timer_c * const initializer, 

		const u32_t id, 

		void * const data,

		const u32_t p_time_ms) = 0;

	/**

	 * The cancel_timer() function cancels the timer id initiated by initializer.

	 *

	 * Adaptation module internally implements the timer.

	 */

	virtual eap_status_e cancel_timer(

		abs_eap_base_timer_c * const initializer, 

		const u32_t id) = 0;

	/**

	 * The cancel_all_timers() function cancels all timers.

	 * User should use this in termination of the stack before

	 * the adaptation module of tools is deleted.

	 * Preferred mode is to cancel each timer directly

	 * using cancel_timer() function.

	 *

	 * Adaptation module internally implements the timer.

	 */

	virtual eap_status_e cancel_all_timers() = 0;

	/**

	 * This function queries the validity of EAP-type.

	 * Lower layer should return eap_status_ok if this EAP-type is supported.

	 */

	virtual eap_status_e check_is_valid_eap_type(const eap_type_value_e eap_type) = 0;

	/**

	 * This function queries the list of supported EAP-types.

	 * Lower layer should return eap_status_ok if this call succeeds.

	 * @param eap_type_list will include the list of supported EAP-types. Each value in list

	 * is type of u32_t and represent one supported EAP-type. List consists of subsequent u32_t type values.

	 */

	virtual eap_status_e get_eap_type_list(

		eap_array_c<eap_type_value_e> * const eap_type_list) = 0;

	virtual eap_status_e add_rogue_ap(eap_array_c<eap_rogue_ap_entry_c> & rogue_ap_list) = 0;

}; // class abs_eapol_core_c

#endif //#if !defined(_ABS_EAPOL_CORE_H_)

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// End.