MFC:

[dragonfly.git] / contrib / wpa_supplicant-0.5.8 / driver.h

/*
 * WPA Supplicant - driver interface definition
 * Copyright (c) 2003-2006, Jouni Malinen <j@w1.fi>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 *
 * Alternatively, this software may be distributed under the terms of BSD
 * license.
 *
 * See README and COPYING for more details.
 */

#ifndef DRIVER_H
#define DRIVER_H

#define WPA_SUPPLICANT_DRIVER_VERSION 2

#include "defs.h"

#define AUTH_ALG_OPEN_SYSTEM    0x01
#define AUTH_ALG_SHARED_KEY     0x02
#define AUTH_ALG_LEAP           0x04

#define IEEE80211_MODE_INFRA    0
#define IEEE80211_MODE_IBSS     1

#define IEEE80211_CAP_ESS       0x0001
#define IEEE80211_CAP_IBSS      0x0002
#define IEEE80211_CAP_PRIVACY   0x0010

#define SSID_MAX_WPA_IE_LEN 40
/**
 * struct wpa_scan_result - Scan results
 * @bssid: BSSID
 * @ssid: SSID
 * @ssid_len: length of the ssid
 * @wpa_ie: WPA IE
 * @wpa_ie_len: length of the wpa_ie
 * @rsn_ie: RSN IE
 * @rsn_ie_len: length of the RSN IE
 * @freq: frequency of the channel in MHz (e.g., 2412 = channel 1)
 * @caps: capability information field in host byte order
 * @qual: signal quality
 * @noise: noise level
 * @level: signal level
 * @maxrate: maximum supported rate
 *
 * This structure is used as a generic format for scan results from the
 * driver. Each driver interface implementation is responsible for converting
 * the driver or OS specific scan results into this format.
 */
struct wpa_scan_result {
        u8 bssid[ETH_ALEN];
        u8 ssid[32];
        size_t ssid_len;
        u8 wpa_ie[SSID_MAX_WPA_IE_LEN];
        size_t wpa_ie_len;
        u8 rsn_ie[SSID_MAX_WPA_IE_LEN];
        size_t rsn_ie_len;
        int freq;
        u16 caps;
        int qual;
        int noise;
        int level;
        int maxrate;
};

/**
 * struct wpa_driver_associate_params - Association parameters
 * Data for struct wpa_driver_ops::associate().
 */
struct wpa_driver_associate_params {
        /**
         * bssid - BSSID of the selected AP
         * This can be %NULL, if ap_scan=2 mode is used and the driver is
         * responsible for selecting with which BSS to associate. */
        const u8 *bssid;

        /**
         * ssid - The selected SSID
         */
        const u8 *ssid;
        size_t ssid_len;

        /**
         * freq - Frequency of the channel the selected AP is using
         * Frequency that the selected AP is using (in MHz as
         * reported in the scan results)
         */
        int freq;

        /**
         * wpa_ie - WPA information element for (Re)Association Request
         * WPA information element to be included in (Re)Association
         * Request (including information element id and length). Use
         * of this WPA IE is optional. If the driver generates the WPA
         * IE, it can use pairwise_suite, group_suite, and
         * key_mgmt_suite to select proper algorithms. In this case,
         * the driver has to notify wpa_supplicant about the used WPA
         * IE by generating an event that the interface code will
         * convert into EVENT_ASSOCINFO data (see wpa_supplicant.h).
         * When using WPA2/IEEE 802.11i, wpa_ie is used for RSN IE
         * instead. The driver can determine which version is used by
         * looking at the first byte of the IE (0xdd for WPA, 0x30 for
         * WPA2/RSN).
         */
        const u8 *wpa_ie;
        /**
         * wpa_ie_len - length of the wpa_ie
         */
        size_t wpa_ie_len;

        /* The selected pairwise/group cipher and key management
         * suites. These are usually ignored if @wpa_ie is used. */
        wpa_cipher pairwise_suite;
        wpa_cipher group_suite;
        wpa_key_mgmt key_mgmt_suite;

        /**
         * auth_alg - Allowed authentication algorithms
         * Bit field of AUTH_ALG_*
         */
        int auth_alg;

        /**
         * mode - Operation mode (infra/ibss) IEEE80211_MODE_*
         */
        int mode;

        /**
         * wep_key - WEP keys for static WEP configuration
         */
        const u8 *wep_key[4];

        /**
         * wep_key_len - WEP key length for static WEP configuration
         */
        size_t wep_key_len[4];

        /**
         * wep_tx_keyidx - WEP TX key index for static WEP configuration
         */
        int wep_tx_keyidx;

        /**
         * mgmt_frame_protection - IEEE 802.11w management frame protection
         */
        enum {
                NO_MGMT_FRAME_PROTECTION,
                MGMT_FRAME_PROTECTION_OPTIONAL,
                MGMT_FRAME_PROTECTION_REQUIRED
        } mgmt_frame_protection;
};

/**
 * struct wpa_driver_capa - Driver capability information
 */
struct wpa_driver_capa {
#define WPA_DRIVER_CAPA_KEY_MGMT_WPA            0x00000001
#define WPA_DRIVER_CAPA_KEY_MGMT_WPA2           0x00000002
#define WPA_DRIVER_CAPA_KEY_MGMT_WPA_PSK        0x00000004
#define WPA_DRIVER_CAPA_KEY_MGMT_WPA2_PSK       0x00000008
#define WPA_DRIVER_CAPA_KEY_MGMT_WPA_NONE       0x00000010
        unsigned int key_mgmt;

#define WPA_DRIVER_CAPA_ENC_WEP40       0x00000001
#define WPA_DRIVER_CAPA_ENC_WEP104      0x00000002
#define WPA_DRIVER_CAPA_ENC_TKIP        0x00000004
#define WPA_DRIVER_CAPA_ENC_CCMP        0x00000008
        unsigned int enc;

#define WPA_DRIVER_AUTH_OPEN            0x00000001
#define WPA_DRIVER_AUTH_SHARED          0x00000002
#define WPA_DRIVER_AUTH_LEAP            0x00000004
        unsigned int auth;

/* Driver generated WPA/RSN IE */
#define WPA_DRIVER_FLAGS_DRIVER_IE      0x00000001
#define WPA_DRIVER_FLAGS_SET_KEYS_AFTER_ASSOC 0x00000002
#define WPA_DRIVER_FLAGS_USER_SPACE_MLME 0x00000004
        unsigned int flags;
};


#define WPA_CHAN_W_SCAN 0x00000001
#define WPA_CHAN_W_ACTIVE_SCAN 0x00000002
#define WPA_CHAN_W_IBSS 0x00000004

struct wpa_channel_data {
        short chan; /* channel number (IEEE 802.11) */
        short freq; /* frequency in MHz */
        int flag; /* flag for user space use (WPA_CHAN_*) */
};

#define WPA_RATE_ERP 0x00000001
#define WPA_RATE_BASIC 0x00000002
#define WPA_RATE_PREAMBLE2 0x00000004
#define WPA_RATE_SUPPORTED 0x00000010
#define WPA_RATE_OFDM 0x00000020
#define WPA_RATE_CCK 0x00000040
#define WPA_RATE_MANDATORY 0x00000100

struct wpa_rate_data {
        int rate; /* rate in 100 kbps */
        int flags; /* WPA_RATE_ flags */
};

typedef enum {
        WPA_MODE_IEEE80211B,
        WPA_MODE_IEEE80211G,
        WPA_MODE_IEEE80211A,
        NUM_WPA_MODES
} wpa_hw_mode;

struct wpa_hw_modes {
        wpa_hw_mode mode;
        int num_channels;
        struct wpa_channel_data *channels;
        int num_rates;
        struct wpa_rate_data *rates;
};


struct ieee80211_rx_status {
        int channel;
        int ssi;
};


/**
 * struct wpa_driver_ops - Driver interface API definition
 *
 * This structure defines the API that each driver interface needs to implement
 * for core wpa_supplicant code. All driver specific functionality is captured
 * in this wrapper.
 */
struct wpa_driver_ops {
        /** Name of the driver interface */
        const char *name;
        /** One line description of the driver interface */
        const char *desc;

        /**
         * get_bssid - Get the current BSSID
         * @priv: private driver interface data
         * @bssid: buffer for BSSID (ETH_ALEN = 6 bytes)
         *
         * Returns: 0 on success, -1 on failure
         *
         * Query kernel driver for the current BSSID and copy it to bssid.
         * Setting bssid to 00:00:00:00:00:00 is recommended if the STA is not
         * associated.
         */
        int (*get_bssid)(void *priv, u8 *bssid);

        /**
         * get_ssid - Get the current SSID
         * @priv: private driver interface data
         * @ssid: buffer for SSID (at least 32 bytes)
         *
         * Returns: Length of the SSID on success, -1 on failure
         *
         * Query kernel driver for the current SSID and copy it to ssid.
         * Returning zero is recommended if the STA is not associated.
         *
         * Note: SSID is an array of octets, i.e., it is not nul terminated and
         * can, at least in theory, contain control characters (including nul)
         * and as such, should be processed as binary data, not a printable
         * string.
         */
        int (*get_ssid)(void *priv, u8 *ssid);

        /**
         * set_wpa - Enable/disable WPA support (OBSOLETE)
         * @priv: private driver interface data
         * @enabled: 1 = enable, 0 = disable
         *
         * Returns: 0 on success, -1 on failure
         *
         * Note: This function is included for backwards compatibility. This is
         * called only just after init and just before deinit, so these
         * functions can be used to implement same functionality and the driver
         * interface need not define this function.
         *
         * Configure the kernel driver to enable/disable WPA support. This may
         * be empty function, if WPA support is always enabled. Common
         * configuration items are WPA IE (clearing it when WPA support is
         * disabled), Privacy flag configuration for capability field (note:
         * this the value need to set in associate handler to allow plaintext
         * mode to be used) when trying to associate with, roaming mode (can
         * allow wpa_supplicant to control roaming if ap_scan=1 is used;
         * however, drivers can also implement roaming if desired, especially
         * ap_scan=2 mode is used for this).
         */
        int (*set_wpa)(void *priv, int enabled);

        /**
         * set_key - Configure encryption key
         * @priv: private driver interface data
         * @alg: encryption algorithm (%WPA_ALG_NONE, %WPA_ALG_WEP,
         *      %WPA_ALG_TKIP, %WPA_ALG_CCMP, %WPA_ALG_IGTK, %WPA_ALG_DHV);
         *      %WPA_ALG_NONE clears the key.
         * @addr: address of the peer STA or ff:ff:ff:ff:ff:ff for
         *      broadcast/default keys
         * @key_idx: key index (0..3), usually 0 for unicast keys; 0..4095 for
         *      IGTK
         * @set_tx: configure this key as the default Tx key (only used when
         *      driver does not support separate unicast/individual key
         * @seq: sequence number/packet number, seq_len octets, the next
         *      packet number to be used for in replay protection; configured
         *      for Rx keys (in most cases, this is only used with broadcast
         *      keys and set to zero for unicast keys)
         * @seq_len: length of the seq, depends on the algorithm:
         *      TKIP: 6 octets, CCMP: 6 octets, IGTK: 6 octets
         * @key: key buffer; TKIP: 16-byte temporal key, 8-byte Tx Mic key,
         *      8-byte Rx Mic Key
         * @key_len: length of the key buffer in octets (WEP: 5 or 13,
         *      TKIP: 32, CCMP: 16, IGTK: 16, DHV: 16)
         *
         * Returns: 0 on success, -1 on failure
         *
         * Configure the given key for the kernel driver. If the driver
         * supports separate individual keys (4 default keys + 1 individual),
         * addr can be used to determine whether the key is default or
         * individual. If only 4 keys are supported, the default key with key
         * index 0 is used as the individual key. STA must be configured to use
         * it as the default Tx key (set_tx is set) and accept Rx for all the
         * key indexes. In most cases, WPA uses only key indexes 1 and 2 for
         * broadcast keys, so key index 0 is available for this kind of
         * configuration.
         *
         * Please note that TKIP keys include separate TX and RX MIC keys and
         * some drivers may expect them in different order than wpa_supplicant
         * is using. If the TX/RX keys are swapped, all TKIP encrypted packets
         * will tricker Michael MIC errors. This can be fixed by changing the
         * order of MIC keys by swapping te bytes 16..23 and 24..31 of the key
         * in driver_*.c set_key() implementation, see driver_ndis.c for an
         * example on how this can be done.
         */
        int (*set_key)(void *priv, wpa_alg alg, const u8 *addr,
                       int key_idx, int set_tx, const u8 *seq, size_t seq_len,
                       const u8 *key, size_t key_len);

        /**
         * init - Initialize driver interface
         * @ctx: context to be used when calling wpa_supplicant functions,
         * e.g., wpa_supplicant_event()
         * @ifname: interface name, e.g., wlan0
         *
         * Returns: Pointer to private data, %NULL on failure
         *
         * Initialize driver interface, including event processing for kernel
         * driver events (e.g., associated, scan results, Michael MIC failure).
         * This function can allocate a private configuration data area for
         * @ctx, file descriptor, interface name, etc. information that may be
         * needed in future driver operations. If this is not used, non-NULL
         * value will need to be returned because %NULL is used to indicate
         * failure. The returned value will be used as 'void *priv' data for
         * all other driver_ops functions.
         *
         * The main event loop (eloop.c) of wpa_supplicant can be used to
         * register callback for read sockets (eloop_register_read_sock()).
         *
         * See wpa_supplicant.h for more information about events and
         * wpa_supplicant_event() function.
         */
        void * (*init)(void *ctx, const char *ifname);

        /**
         * deinit - Deinitialize driver interface
         * @priv: private driver interface data from init()
         *
         * Shut down driver interface and processing of driver events. Free
         * private data buffer if one was allocated in init() handler.
         */
        void (*deinit)(void *priv);

        /**
         * set_param - Set driver configuration parameters
         * @priv: private driver interface data from init()
         * @param: driver specific configuration parameters
         *
         * Returns: 0 on success, -1 on failure
         *
         * Optional handler for notifying driver interface about configuration
         * parameters (driver_param).
         */
        int (*set_param)(void *priv, const char *param);

        /**
         * set_countermeasures - Enable/disable TKIP countermeasures
         * @priv: private driver interface data
         * @enabled: 1 = countermeasures enabled, 0 = disabled
         *
         * Returns: 0 on success, -1 on failure
         *
         * Configure TKIP countermeasures. When these are enabled, the driver
         * should drop all received and queued frames that are using TKIP.
         */
        int (*set_countermeasures)(void *priv, int enabled);

        /**
         * set_drop_unencrypted - Enable/disable unencrypted frame filtering
         * @priv: private driver interface data
         * @enabled: 1 = unencrypted Tx/Rx frames will be dropped, 0 = disabled
         *
         * Returns: 0 on success, -1 on failure
         *
         * Configure the driver to drop all non-EAPOL frames (both receive and
         * transmit paths). Unencrypted EAPOL frames (ethertype 0x888e) must
         * still be allowed for key negotiation.
         */
        int (*set_drop_unencrypted)(void *priv, int enabled);

        /**
         * scan - Request the driver to initiate scan
         * @priv: private driver interface data
         * @ssid: specific SSID to scan for (ProbeReq) or %NULL to scan for
         *      all SSIDs (either active scan with broadcast SSID or passive
         *      scan
         * @ssid_len: length of the SSID
         *
         * Returns: 0 on success, -1 on failure
         *
         * Once the scan results are ready, the driver should report scan
         * results event for wpa_supplicant which will eventually request the
         * results with wpa_driver_get_scan_results().
         */
        int (*scan)(void *priv, const u8 *ssid, size_t ssid_len);

        /**
         * get_scan_results - Fetch the latest scan results
         * @priv: private driver interface data
         * @results: pointer to buffer for scan results
         * @max_size: maximum number of entries (buffer size)
         *
         * Returns: Number of scan result entries used on success, -1 on
         * failure
         *
         * If scan results include more than max_size BSSes, max_size will be
         * returned and the remaining entries will not be included in the
         * buffer.
         */
        int (*get_scan_results)(void *priv,
                                struct wpa_scan_result *results,
                                size_t max_size);

        /**
         * deauthenticate - Request driver to deauthenticate
         * @priv: private driver interface data
         * @addr: peer address (BSSID of the AP)
         * @reason_code: 16-bit reason code to be sent in the deauthentication
         *      frame
         *
         * Returns: 0 on success, -1 on failure
         */
        int (*deauthenticate)(void *priv, const u8 *addr, int reason_code);

        /**
         * disassociate - Request driver to disassociate
         * @priv: private driver interface data
         * @addr: peer address (BSSID of the AP)
         * @reason_code: 16-bit reason code to be sent in the disassociation
         *      frame
         *
         * Returns: 0 on success, -1 on failure
         */
        int (*disassociate)(void *priv, const u8 *addr, int reason_code);

        /**
         * associate - Request driver to associate
         * @priv: private driver interface data
         * @params: association parameters
         *
         * Returns: 0 on success, -1 on failure
         */
        int (*associate)(void *priv,
                         struct wpa_driver_associate_params *params);

        /**
         * set_auth_alg - Set IEEE 802.11 authentication algorithm
         * @priv: private driver interface data
         * @auth_alg: bit field of AUTH_ALG_*
         *
         * If the driver supports more than one authentication algorithm at the
         * same time, it should configure all supported algorithms. If not, one
         * algorithm needs to be selected arbitrarily. Open System
         * authentication should be ok for most cases and it is recommended to
         * be used if other options are not supported. Static WEP configuration
         * may also use Shared Key authentication and LEAP requires its own
         * algorithm number. For LEAP, user can make sure that only one
         * algorithm is used at a time by configuring LEAP as the only
         * supported EAP method. This information is also available in
         * associate() params, so set_auth_alg may not be needed in case of
         * most drivers.
         *
         * Returns: 0 on success, -1 on failure
         */
        int (*set_auth_alg)(void *priv, int auth_alg);

        /**
         * add_pmkid - Add PMKSA cache entry to the driver
         * @priv: private driver interface data
         * @bssid: BSSID for the PMKSA cache entry
         * @pmkid: PMKID for the PMKSA cache entry
         *
         * Returns: 0 on success, -1 on failure
         *
         * This function is called when a new PMK is received, as a result of
         * either normal authentication or RSN pre-authentication.
         *
         * If the driver generates RSN IE, i.e., it does not use wpa_ie in
         * associate(), add_pmkid() can be used to add new PMKSA cache entries
         * in the driver. If the driver uses wpa_ie from wpa_supplicant, this
         * driver_ops function does not need to be implemented. Likewise, if
         * the driver does not support WPA, this function is not needed.
         */
        int (*add_pmkid)(void *priv, const u8 *bssid, const u8 *pmkid);

        /**
         * remove_pmkid - Remove PMKSA cache entry to the driver
         * @priv: private driver interface data
         * @bssid: BSSID for the PMKSA cache entry
         * @pmkid: PMKID for the PMKSA cache entry
         *
         * Returns: 0 on success, -1 on failure
         *
         * This function is called when the supplicant drops a PMKSA cache
         * entry for any reason.
         *
         * If the driver generates RSN IE, i.e., it does not use wpa_ie in
         * associate(), remove_pmkid() can be used to synchronize PMKSA caches
         * between the driver and wpa_supplicant. If the driver uses wpa_ie
         * from wpa_supplicant, this driver_ops function does not need to be
         * implemented. Likewise, if the driver does not support WPA, this
         * function is not needed.
         */
        int (*remove_pmkid)(void *priv, const u8 *bssid, const u8 *pmkid);

        /**
         * flush_pmkid - Flush PMKSA cache
         * @priv: private driver interface data
         *
         * Returns: 0 on success, -1 on failure
         *
         * This function is called when the supplicant drops all PMKSA cache
         * entries for any reason.
         *
         * If the driver generates RSN IE, i.e., it does not use wpa_ie in
         * associate(), remove_pmkid() can be used to synchronize PMKSA caches
         * between the driver and wpa_supplicant. If the driver uses wpa_ie
         * from wpa_supplicant, this driver_ops function does not need to be
         * implemented. Likewise, if the driver does not support WPA, this
         * function is not needed.
         */
        int (*flush_pmkid)(void *priv);

        /**
         * flush_pmkid - Flush PMKSA cache
         * @priv: private driver interface data
         *
         * Returns: 0 on success, -1 on failure
         *
         * Get driver/firmware/hardware capabilities.
         */
        int (*get_capa)(void *priv, struct wpa_driver_capa *capa);

        /**
         * poll - Poll driver for association information
         * @priv: private driver interface data
         *
         * This is an option callback that can be used when the driver does not
         * provide event mechanism for association events. This is called when
         * receiving WPA EAPOL-Key messages that require association
         * information. The driver interface is supposed to generate associnfo
         * event before returning from this callback function. In addition, the
         * driver interface should generate an association event after having
         * sent out associnfo.
         */
        void (*poll)(void *priv);

        /**
         * get_ifname - Get interface name
         * @priv: private driver interface data
         *
         * Returns: Pointer to the interface name. This can differ from the
         * interface name used in init() call.
         *
         * This optional function can be used to allow the driver interface to
         * replace the interface name with something else, e.g., based on an
         * interface mapping from a more descriptive name.
         */
        const char * (*get_ifname)(void *priv);

        /**
         * get_mac_addr - Get own MAC address
         * @priv: private driver interface data
         *
         * Returns: Pointer to own MAC address or %NULL on failure
         *
         * This optional function can be used to get the own MAC address of the
         * device from the driver interface code. This is only needed if the
         * l2_packet implementation for the OS does not provide easy access to
         * a MAC address. */
        const u8 * (*get_mac_addr)(void *priv);

        /**
         * send_eapol - Optional function for sending EAPOL packets
         * @priv: private driver interface data
         * @dest: Destination MAC address
         * @proto: Ethertype
         * @data: EAPOL packet starting with IEEE 802.1X header
         * @data_len: Size of the EAPOL packet
         *
         * Returns: 0 on success, -1 on failure
         *
         * This optional function can be used to override l2_packet operations
         * with driver specific functionality. If this function pointer is set,
         * l2_packet module is not used at all and the driver interface code is
         * responsible for receiving and sending all EAPOL packets. The
         * received EAPOL packets are sent to core code by calling
         * wpa_supplicant_rx_eapol(). The driver interface is required to
         * implement get_mac_addr() handler if send_eapol() is used.
         */
        int (*send_eapol)(void *priv, const u8 *dest, u16 proto,
                          const u8 *data, size_t data_len);

        /**
         * set_operstate - Sets device operating state to DORMANT or UP
         * @priv: private driver interface data
         * @state: 0 = dormant, 1 = up
         * Returns: 0 on success, -1 on failure
         *
         * This is an optional function that can be used on operating systems
         * that support a concept of controlling network device state from user
         * space applications. This function, if set, gets called with
         * state = 1 when authentication has been completed and with state = 0
         * when connection is lost.
         */
        int (*set_operstate)(void *priv, int state);

        /**
         * mlme_setprotection - MLME-SETPROTECTION.request primitive
         * @priv: Private driver interface data
         * @addr: Address of the station for which to set protection (may be
         * %NULL for group keys)
         * @protect_type: MLME_SETPROTECTION_PROTECT_TYPE_*
         * @key_type: MLME_SETPROTECTION_KEY_TYPE_*
         * Returns: 0 on success, -1 on failure
         *
         * This is an optional function that can be used to set the driver to
         * require protection for Tx and/or Rx frames. This uses the layer
         * interface defined in IEEE 802.11i-2004 clause 10.3.22.1
         * (MLME-SETPROTECTION.request). Many drivers do not use explicit
         * set protection operation; instead, they set protection implicitly
         * based on configured keys.
         */
        int (*mlme_setprotection)(void *priv, const u8 *addr, int protect_type,
                                  int key_type);

        /**
         * get_hw_feature_data - Get hardware support data (channels and rates)
         * @priv: Private driver interface data
         * @num_modes: Variable for returning the number of returned modes
         * flags: Variable for returning hardware feature flags
         * Returns: Pointer to allocated hardware data on success or %NULL on
         * failure. Caller is responsible for freeing this.
         *
         * This function is only needed for drivers that export MLME
         * (management frame processing) to wpa_supplicant.
         */
        struct wpa_hw_modes * (*get_hw_feature_data)(void *priv,
                                                     u16 *num_modes,
                                                     u16 *flags);

        /**
         * set_channel - Set channel
         * @priv: Private driver interface data
         * @phymode: WPA_MODE_IEEE80211B, ..
         * @chan: IEEE 802.11 channel number
         * @freq: Frequency of the channel in MHz
         * Returns: 0 on success, -1 on failure
         *
         * This function is only needed for drivers that export MLME
         * (management frame processing) to wpa_supplicant.
         */
        int (*set_channel)(void *priv, wpa_hw_mode phymode, int chan,
                           int freq);

        /**
         * set_ssid - Set SSID
         * @priv: Private driver interface data
         * @ssid: SSID
         * @ssid_len: SSID length
         * Returns: 0 on success, -1 on failure
         *
         * This function is only needed for drivers that export MLME
         * (management frame processing) to wpa_supplicant.
         */
        int (*set_ssid)(void *priv, const u8 *ssid, size_t ssid_len);

        /**
         * set_bssid - Set BSSID
         * @priv: Private driver interface data
         * @bssid: BSSID
         * Returns: 0 on success, -1 on failure
         *
         * This function is only needed for drivers that export MLME
         * (management frame processing) to wpa_supplicant.
         */
        int (*set_bssid)(void *priv, const u8 *bssid);

        /**
         * send_mlme - Send management frame from MLME
         * @priv: Private driver interface data
         * @data: IEEE 802.11 management frame with IEEE 802.11 header
         * @data_len: Size of the management frame
         * Returns: 0 on success, -1 on failure
         *
         * This function is only needed for drivers that export MLME
         * (management frame processing) to wpa_supplicant.
         */
        int (*send_mlme)(void *priv, const u8 *data, size_t data_len);

        /**
         * mlme_add_sta - Add a STA entry into the driver/netstack
         * @priv: Private driver interface data
         * @addr: MAC address of the STA (e.g., BSSID of the AP)
         * @supp_rates: Supported rate set (from (Re)AssocResp); in IEEE 802.11
         * format (one octet per rate, 1 = 0.5 Mbps)
         * @supp_rates_len: Number of entries in supp_rates
         * Returns: 0 on success, -1 on failure
         *
         * This function is only needed for drivers that export MLME
         * (management frame processing) to wpa_supplicant. When the MLME code
         * completes association with an AP, this function is called to
         * configure the driver/netstack with a STA entry for data frame
         * processing (TX rate control, encryption/decryption).
         */
         int (*mlme_add_sta)(void *priv, const u8 *addr, const u8 *supp_rates,
                             size_t supp_rates_len);

        /**
         * mlme_remove_sta - Remove a STA entry from the driver/netstack
         * @priv: Private driver interface data
         * @addr: MAC address of the STA (e.g., BSSID of the AP)
         * Returns: 0 on success, -1 on failure
         *
         * This function is only needed for drivers that export MLME
         * (management frame processing) to wpa_supplicant.
         */
         int (*mlme_remove_sta)(void *priv, const u8 *addr);
};

#endif /* DRIVER_H */