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/*
* Wi-Fi Multimedia Admission Control (WMM-AC)
* Copyright(c) 2014, Intel Mobile Communication GmbH.
* Copyright(c) 2014, Intel Corporation. All rights reserved.
*
* This software may be distributed under the terms of the BSD license.
* See README for more details.
*/
#ifndef WMM_AC_H
#define WMM_AC_H
#include "common/ieee802_11_defs.h"
#include "drivers/driver.h"
struct wpa_supplicant;
#define WMM_AC_ACCESS_POLICY_EDCA 1
#define WMM_AC_FIXED_MSDU_SIZE BIT(15)
#define WMM_AC_MAX_TID 7
#define WMM_AC_MAX_USER_PRIORITY 7
#define WMM_AC_MIN_SBA_UNITY 0x2000
#define WMM_AC_MAX_NOMINAL_MSDU 32767
/**
* struct wmm_ac_assoc_data - WMM Admission Control Association Data
*
* This struct will store any relevant WMM association data needed by WMM AC.
* In case there is a valid WMM association, an instance of this struct will be
* created. In case there is no instance of this struct, the station is not
* associated to a valid WMM BSS and hence, WMM AC will not be used.
*/
struct wmm_ac_assoc_data {
struct {
/*
* acm - Admission Control Mandatory
* In case an access category is ACM, the traffic will have
* to be admitted by WMM-AC's admission mechanism before use.
*/
unsigned int acm:1;
/*
* uapsd_queues - Unscheduled Automatic Power Save Delivery
* queues.
* Indicates whether ACs are configured for U-APSD (or legacy
* PS). Storing this value is necessary in order to set the
* Power Save Bit (PSB) in ADDTS request Action frames (if not
* given).
*/
unsigned int uapsd:1;
} ac_params[WMM_AC_NUM];
};
/**
* wmm_ac_dir - WMM Admission Control Direction
*/
enum wmm_ac_dir {
WMM_AC_DIR_UPLINK = 0,
WMM_AC_DIR_DOWNLINK = 1,
WMM_AC_DIR_BIDIRECTIONAL = 3
};
/**
* ts_dir_idx - indices of internally saved tspecs
*
* we can have multiple tspecs (downlink + uplink) per ac.
* save them in array, and use the enum to directly access
* the respective tspec slot (according to the direction).
*/
enum ts_dir_idx {
TS_DIR_IDX_UPLINK,
TS_DIR_IDX_DOWNLINK,
TS_DIR_IDX_BIDI,
TS_DIR_IDX_COUNT
};
#define TS_DIR_IDX_ALL (BIT(TS_DIR_IDX_COUNT) - 1)
/**
* struct wmm_ac_addts_request - ADDTS Request Information
*
* The last sent ADDTS request(s) will be saved as element(s) of this struct in
* order to be compared with the received ADDTS response in ADDTS response
* action frame handling and should be stored until that point.
* In case a new traffic stream will be created/replaced/updated, only its
* relevant traffic stream information will be stored as a wmm_ac_ts struct.
*/
struct wmm_ac_addts_request {
/*
* dialog token - Used to link the received ADDTS response with this
* saved ADDTS request when ADDTS response is being handled
*/
u8 dialog_token;
/*
* address - The alleged traffic stream's receiver/transmitter address
* Address and TID are used to identify the TS (TID is contained in
* TSPEC)
*/
u8 address[ETH_ALEN];
/*
* tspec - Traffic Stream Specification, will be used to compare the
* sent TSPEC in ADDTS request to the received TSPEC in ADDTS response
* and act accordingly in ADDTS response handling
*/
struct wmm_tspec_element tspec;
};
/**
* struct wmm_ac_ts_setup_params - TS setup parameters
*
* This struct holds parameters which should be provided
* to wmm_ac_ts_setup in order to setup a traffic stream
*/
struct wmm_ac_ts_setup_params {
/*
* tsid - Traffic ID
* TID and address are used to identify the TS
*/
int tsid;
/*
* direction - Traffic Stream's direction
*/
enum wmm_ac_dir direction;
/*
* user_priority - Traffic Stream's user priority
*/
int user_priority;
/*
* nominal_msdu_size - Nominal MAC service data unit size
*/
int nominal_msdu_size;
/*
* fixed_nominal_msdu - Whether the size is fixed
* 0 = Nominal MSDU size is not fixed
* 1 = Nominal MSDU size is fixed
*/
int fixed_nominal_msdu;
/*
* surplus_bandwidth_allowance - Specifies excess time allocation
*/
int mean_data_rate;
/*
* minimum_phy_rate - Specifies the minimum supported PHY rate in bps
*/
int minimum_phy_rate;
/*
* surplus_bandwidth_allowance - Specifies excess time allocation
*/
int surplus_bandwidth_allowance;
};
void wmm_ac_notify_assoc(struct wpa_supplicant *wpa_s, const u8 *ies,
size_t ies_len, const struct wmm_params *wmm_params);
void wmm_ac_notify_disassoc(struct wpa_supplicant *wpa_s);
int wpas_wmm_ac_addts(struct wpa_supplicant *wpa_s,
struct wmm_ac_ts_setup_params *params);
int wpas_wmm_ac_delts(struct wpa_supplicant *wpa_s, u8 tsid);
void wmm_ac_rx_action(struct wpa_supplicant *wpa_s, const u8 *da,
const u8 *sa, const u8 *data, size_t len);
int wpas_wmm_ac_status(struct wpa_supplicant *wpa_s, char *buf, size_t buflen);
void wmm_ac_save_tspecs(struct wpa_supplicant *wpa_s);
void wmm_ac_clear_saved_tspecs(struct wpa_supplicant *wpa_s);
int wmm_ac_restore_tspecs(struct wpa_supplicant *wpa_s);
#endif /* WMM_AC_H */
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