wlan_bearer/wlanengine/wlan_common/wlanengine_common_3.1/inc/core_operation_roam.h
/*
* Copyright (c) 2005-2009 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: State machine for roaming
*
*/
/*
* %version: 26 %
*/
#ifndef CORE_OPERATION_ROAM_H
#define CORE_OPERATION_ROAM_H
#include "core_operation_base.h"
#include "core_type_list.h"
#include "core_ap_data.h"
#include "core_frame_dot11_ie.h"
class core_frame_assoc_resp_c;
/**
* State machine for roaming between APs.
*
* @since S60 v3.1
*/
NONSHARABLE_CLASS( core_operation_roam_c ) : public core_operation_base_c
{
public:
/**
* Data structure for a roaming list entry.
*/
struct roaming_list_entry_s
{
core_ap_data_c* ap_data;
bool_t is_cached_sa_available;
};
/**
* The possible states of the state machine.
*/
enum core_state_e
{
core_state_init = core_base_state_next,
core_state_req_disable_userdata_before_connect,
core_state_req_connect,
core_state_req_update_ts,
core_state_req_enable_userdata,
core_state_fail_connect,
core_state_fail_set_tx_power,
core_state_MAX
};
/**
* Constructor
*
* @param request_id An unique identification for the request.
* @param server Handle to core server.
* @param drivers Handle to low-level management functionality.
* @param adaptation Handle upper-level management functionality.
* @param is_connected Whether the terminal is currently connected to a BSS.
* @param tag Tag used for iterating scan results for a suitable AP.
* @param min_required_rcpi Minimum RCPI value required for connection.
* @param min_medium_time Minimum amount of free medium time required for connection.
* @param ssid SSID used for connection.
* @param bssid BSSID used for connection, BROADCAST_MAC_ADDR if any.
*/
core_operation_roam_c(
u32_t request_id,
core_server_c* server,
abs_core_driverif_c* drivers,
abs_core_server_callback_c* adaptation,
bool_t& is_connected,
u8_t tag,
u8_t min_required_rcpi,
const medium_time_s& min_medium_time,
const core_ssid_s& ssid,
const core_mac_address_s& bssid );
/**
* Destructor.
*/
virtual ~core_operation_roam_c();
protected:
/**
* This method is called when a pending request has been completed
* and so sub-operations are pending.
*
* @return status of the operation:
* core_error_request_pending if the operation is not finished,
* otherwise the status code of the finished operation
*/
core_error_e next_state();
/**
* This method is called when the operation needs to be canceled.
*
* @return status of the operation:
* core_error_request_pending if the operation is not finished,
* otherwise the status code of the finished operation
*/
core_error_e cancel();
private:
/**
* Check whether a cached security association is available for the given AP.
*
* @param ap_data Information about the AP.
* @return true_t if a security association exists, false_t otherwise.
*/
bool_t is_security_association_available(
const core_ap_data_c& ap_data );
/**
* Determine the connection status based on the status information.
*
* @param request_status The request completion status.
* @param management_status The association response status from the AP.
* @return The connection status based on the status information.
*/
core_connect_status_e connect_status(
core_error_e request_status,
core_management_status_e management_status );
/**
* Decide whether the connection failure is fatal and the AP should
* be blacklisted.
*
* @param request_status The request completion status.
* @param management_status The association response status from the AP.
* @param is_reassociation Whether the connection attempt was a reassociation.
* @return core_ap_blacklist_reason_none if no blacklisting required,
* the reason otherwise.
*/
core_ap_blacklist_reason_e is_fatal_failure(
core_error_e request_status,
core_management_status_e management_status,
bool_t is_reassociation ) const;
/**
* Determine the connection status based on the EAP information.
*
* @param security_mode The used security mode.
* @param eap_type EAP type used
* @param eap_error EAP-specific error code.
* @return The connection status based on the EAP information.
*/
core_connect_status_e eap_connect_status(
core_security_mode_e security_mode,
u32_t eap_type,
u32_t eap_error ) const;
/**
* Process the frame and add it to the roaming list if suitable for connecting.
*
* @param ap_data Information about the AP.
* @return true_t if the AP was added to the roaming list, false_t otherwise.
*/
bool_t process_frame(
core_ap_data_c& ap_data );
/**
* Update roam metrics based on the connection failure reason.
*
* @param request_status The request completion status.
* @param management_status The association response status from the AP.
*/
void update_roam_failure_count(
core_error_e request_status,
core_management_status_e management_status );
/**
* Create and send neighbor report request.
*/
void handle_neighbor_request();
private: // data
/** Whether we are still connected to an AP. */
bool_t& is_connected_m;
/** The scan tag used for iterating suitable APs. */
u8_t tag_m;
/** The minimum RCPI value required. */
u8_t min_required_rcpi_m;
/** The minimum amount of free medium time required. */
const medium_time_s min_medium_time_m;
/** SSID to use for connection. */
const core_ssid_s ssid_m;
/** BSSID to use for connection. */
const core_mac_address_s bssid_m;
/** List of suitable APs. */
core_type_list_c<roaming_list_entry_s> roaming_list_m;
/** Status of connection attempt. */
core_management_status_e management_status_m;
/** Connect status for the current connection attempt. */
core_connect_status_e connect_status_m;
/** The AP currently tried. Not owned by this pointer. */
core_ap_data_c* current_ap_m;
/** BSSID currently connected to. */
core_mac_address_s current_bssid_m;
/** The list of IEs that will be added to the association/reassociation request */
core_type_list_c<core_frame_dot11_ie_c> assoc_ie_list_m;
/** Whether the connection attempt uses a cached security association. */
bool_t is_cached_sa_used_m;
/** The (re-)association response frame is stored here if received. */
core_frame_assoc_resp_c* assoc_resp_m;
};
#endif // CORE_OPERATION_ROAM_H