contrib/wpa_supplicant-0.5.8/driver.h

   1 /*
   2  * WPA Supplicant - driver interface definition
   3  * Copyright (c) 2003-2006, Jouni Malinen <j@w1.fi>
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License version 2 as
   7  * published by the Free Software Foundation.
   8  *
   9  * Alternatively, this software may be distributed under the terms of BSD
  10  * license.
  11  *
  12  * See README and COPYING for more details.
  13  */
  14
  15 #ifndef DRIVER_H
  16 #define DRIVER_H
  17
  18 #define WPA_SUPPLICANT_DRIVER_VERSION 2
  19
  20 #include "defs.h"
  21
  22 #define AUTH_ALG_OPEN_SYSTEM    0x01
  23 #define AUTH_ALG_SHARED_KEY     0x02
  24 #define AUTH_ALG_LEAP           0x04
  25
  26 #define IEEE80211_MODE_INFRA    0
  27 #define IEEE80211_MODE_IBSS     1
  28
  29 #define IEEE80211_CAP_ESS       0x0001
  30 #define IEEE80211_CAP_IBSS      0x0002
  31 #define IEEE80211_CAP_PRIVACY   0x0010
  32
  33 #define SSID_MAX_WPA_IE_LEN 40
  34 /**
  35  * struct wpa_scan_result - Scan results
  36  * @bssid: BSSID
  37  * @ssid: SSID
  38  * @ssid_len: length of the ssid
  39  * @wpa_ie: WPA IE
  40  * @wpa_ie_len: length of the wpa_ie
  41  * @rsn_ie: RSN IE
  42  * @rsn_ie_len: length of the RSN IE
  43  * @freq: frequency of the channel in MHz (e.g., 2412 = channel 1)
  44  * @caps: capability information field in host byte order
  45  * @qual: signal quality
  46  * @noise: noise level
  47  * @level: signal level
  48  * @maxrate: maximum supported rate
  49  *
  50  * This structure is used as a generic format for scan results from the
  51  * driver. Each driver interface implementation is responsible for converting
  52  * the driver or OS specific scan results into this format.
  53  */
  54 struct wpa_scan_result {
  55         u8 bssid[ETH_ALEN];
  56         u8 ssid[32];
  57         size_t ssid_len;
  58         u8 wpa_ie[SSID_MAX_WPA_IE_LEN];
  59         size_t wpa_ie_len;
  60         u8 rsn_ie[SSID_MAX_WPA_IE_LEN];
  61         size_t rsn_ie_len;
  62         int freq;
  63         u16 caps;
  64         int qual;
  65         int noise;
  66         int level;
  67         int maxrate;
  68 };
  69
  70 /**
  71  * struct wpa_driver_associate_params - Association parameters
  72  * Data for struct wpa_driver_ops::associate().
  73  */
  74 struct wpa_driver_associate_params {
  75         /**
  76          * bssid - BSSID of the selected AP
  77          * This can be %NULL, if ap_scan=2 mode is used and the driver is
  78          * responsible for selecting with which BSS to associate. */
  79         const u8 *bssid;
  80
  81         /**
  82          * ssid - The selected SSID
  83          */
  84         const u8 *ssid;
  85         size_t ssid_len;
  86
  87         /**
  88          * freq - Frequency of the channel the selected AP is using
  89          * Frequency that the selected AP is using (in MHz as
  90          * reported in the scan results)
  91          */
  92         int freq;
  93
  94         /**
  95          * wpa_ie - WPA information element for (Re)Association Request
  96          * WPA information element to be included in (Re)Association
  97          * Request (including information element id and length). Use
  98          * of this WPA IE is optional. If the driver generates the WPA
  99          * IE, it can use pairwise_suite, group_suite, and
 100          * key_mgmt_suite to select proper algorithms. In this case,
 101          * the driver has to notify wpa_supplicant about the used WPA
 102          * IE by generating an event that the interface code will
 103          * convert into EVENT_ASSOCINFO data (see wpa_supplicant.h).
 104          * When using WPA2/IEEE 802.11i, wpa_ie is used for RSN IE
 105          * instead. The driver can determine which version is used by
 106          * looking at the first byte of the IE (0xdd for WPA, 0x30 for
 107          * WPA2/RSN).
 108          */
 109         const u8 *wpa_ie;
 110         /**
 111          * wpa_ie_len - length of the wpa_ie
 112          */
 113         size_t wpa_ie_len;
 114
 115         /* The selected pairwise/group cipher and key management
 116          * suites. These are usually ignored if @wpa_ie is used. */
 117         wpa_cipher pairwise_suite;
 118         wpa_cipher group_suite;
 119         wpa_key_mgmt key_mgmt_suite;
 120
 121         /**
 122          * auth_alg - Allowed authentication algorithms
 123          * Bit field of AUTH_ALG_*
 124          */
 125         int auth_alg;
 126
 127         /**
 128          * mode - Operation mode (infra/ibss) IEEE80211_MODE_*
 129          */
 130         int mode;
 131
 132         /**
 133          * wep_key - WEP keys for static WEP configuration
 134          */
 135         const u8 *wep_key[4];
 136
 137         /**
 138          * wep_key_len - WEP key length for static WEP configuration
 139          */
 140         size_t wep_key_len[4];
 141
 142         /**
 143          * wep_tx_keyidx - WEP TX key index for static WEP configuration
 144          */
 145         int wep_tx_keyidx;
 146
 147         /**
 148          * mgmt_frame_protection - IEEE 802.11w management frame protection
 149          */
 150         enum {
 151                 NO_MGMT_FRAME_PROTECTION,
 152                 MGMT_FRAME_PROTECTION_OPTIONAL,
 153                 MGMT_FRAME_PROTECTION_REQUIRED
 154         } mgmt_frame_protection;
 155 };
 156
 157 /**
 158  * struct wpa_driver_capa - Driver capability information
 159  */
 160 struct wpa_driver_capa {
 161 #define WPA_DRIVER_CAPA_KEY_MGMT_WPA            0x00000001
 162 #define WPA_DRIVER_CAPA_KEY_MGMT_WPA2           0x00000002
 163 #define WPA_DRIVER_CAPA_KEY_MGMT_WPA_PSK        0x00000004
 164 #define WPA_DRIVER_CAPA_KEY_MGMT_WPA2_PSK       0x00000008
 165 #define WPA_DRIVER_CAPA_KEY_MGMT_WPA_NONE       0x00000010
 166         unsigned int key_mgmt;
 167
 168 #define WPA_DRIVER_CAPA_ENC_WEP40       0x00000001
 169 #define WPA_DRIVER_CAPA_ENC_WEP104      0x00000002
 170 #define WPA_DRIVER_CAPA_ENC_TKIP        0x00000004
 171 #define WPA_DRIVER_CAPA_ENC_CCMP        0x00000008
 172         unsigned int enc;
 173
 174 #define WPA_DRIVER_AUTH_OPEN            0x00000001
 175 #define WPA_DRIVER_AUTH_SHARED          0x00000002
 176 #define WPA_DRIVER_AUTH_LEAP            0x00000004
 177         unsigned int auth;
 178
 179 /* Driver generated WPA/RSN IE */
 180 #define WPA_DRIVER_FLAGS_DRIVER_IE      0x00000001
 181 #define WPA_DRIVER_FLAGS_SET_KEYS_AFTER_ASSOC 0x00000002
 182 #define WPA_DRIVER_FLAGS_USER_SPACE_MLME 0x00000004
 183         unsigned int flags;
 184 };
 185
 186
 187 #define WPA_CHAN_W_SCAN 0x00000001
 188 #define WPA_CHAN_W_ACTIVE_SCAN 0x00000002
 189 #define WPA_CHAN_W_IBSS 0x00000004
 190
 191 struct wpa_channel_data {
 192         short chan; /* channel number (IEEE 802.11) */
 193         short freq; /* frequency in MHz */
 194         int flag; /* flag for user space use (WPA_CHAN_*) */
 195 };
 196
 197 #define WPA_RATE_ERP 0x00000001
 198 #define WPA_RATE_BASIC 0x00000002
 199 #define WPA_RATE_PREAMBLE2 0x00000004
 200 #define WPA_RATE_SUPPORTED 0x00000010
 201 #define WPA_RATE_OFDM 0x00000020
 202 #define WPA_RATE_CCK 0x00000040
 203 #define WPA_RATE_MANDATORY 0x00000100
 204
 205 struct wpa_rate_data {
 206         int rate; /* rate in 100 kbps */
 207         int flags; /* WPA_RATE_ flags */
 208 };
 209
 210 typedef enum {
 211         WPA_MODE_IEEE80211B,
 212         WPA_MODE_IEEE80211G,
 213         WPA_MODE_IEEE80211A,
 214         NUM_WPA_MODES
 215 } wpa_hw_mode;
 216
 217 struct wpa_hw_modes {
 218         wpa_hw_mode mode;
 219         int num_channels;
 220         struct wpa_channel_data *channels;
 221         int num_rates;
 222         struct wpa_rate_data *rates;
 223 };
 224
 225
 226 struct ieee80211_rx_status {
 227         int channel;
 228         int ssi;
 229 };
 230
 231
 232 /**
 233  * struct wpa_driver_ops - Driver interface API definition
 234  *
 235  * This structure defines the API that each driver interface needs to implement
 236  * for core wpa_supplicant code. All driver specific functionality is captured
 237  * in this wrapper.
 238  */
 239 struct wpa_driver_ops {
 240         /** Name of the driver interface */
 241         const char *name;
 242         /** One line description of the driver interface */
 243         const char *desc;
 244
 245         /**
 246          * get_bssid - Get the current BSSID
 247          * @priv: private driver interface data
 248          * @bssid: buffer for BSSID (ETH_ALEN = 6 bytes)
 249          *
 250          * Returns: 0 on success, -1 on failure
 251          *
 252          * Query kernel driver for the current BSSID and copy it to bssid.
 253          * Setting bssid to 00:00:00:00:00:00 is recommended if the STA is not
 254          * associated.
 255          */
 256         int (*get_bssid)(void *priv, u8 *bssid);
 257
 258         /**
 259          * get_ssid - Get the current SSID
 260          * @priv: private driver interface data
 261          * @ssid: buffer for SSID (at least 32 bytes)
 262          *
 263          * Returns: Length of the SSID on success, -1 on failure
 264          *
 265          * Query kernel driver for the current SSID and copy it to ssid.
 266          * Returning zero is recommended if the STA is not associated.
 267          *
 268          * Note: SSID is an array of octets, i.e., it is not nul terminated and
 269          * can, at least in theory, contain control characters (including nul)
 270          * and as such, should be processed as binary data, not a printable
 271          * string.
 272          */
 273         int (*get_ssid)(void *priv, u8 *ssid);
 274
 275         /**
 276          * set_wpa - Enable/disable WPA support (OBSOLETE)
 277          * @priv: private driver interface data
 278          * @enabled: 1 = enable, 0 = disable
 279          *
 280          * Returns: 0 on success, -1 on failure
 281          *
 282          * Note: This function is included for backwards compatibility. This is
 283          * called only just after init and just before deinit, so these
 284          * functions can be used to implement same functionality and the driver
 285          * interface need not define this function.
 286          *
 287          * Configure the kernel driver to enable/disable WPA support. This may
 288          * be empty function, if WPA support is always enabled. Common
 289          * configuration items are WPA IE (clearing it when WPA support is
 290          * disabled), Privacy flag configuration for capability field (note:
 291          * this the value need to set in associate handler to allow plaintext
 292          * mode to be used) when trying to associate with, roaming mode (can
 293          * allow wpa_supplicant to control roaming if ap_scan=1 is used;
 294          * however, drivers can also implement roaming if desired, especially
 295          * ap_scan=2 mode is used for this).
 296          */
 297         int (*set_wpa)(void *priv, int enabled);
 298
 299         /**
 300          * set_key - Configure encryption key
 301          * @priv: private driver interface data
 302          * @alg: encryption algorithm (%WPA_ALG_NONE, %WPA_ALG_WEP,
 303          *      %WPA_ALG_TKIP, %WPA_ALG_CCMP, %WPA_ALG_IGTK, %WPA_ALG_DHV);
 304          *      %WPA_ALG_NONE clears the key.
 305          * @addr: address of the peer STA or ff:ff:ff:ff:ff:ff for
 306          *      broadcast/default keys
 307          * @key_idx: key index (0..3), usually 0 for unicast keys; 0..4095 for
 308          *      IGTK
 309          * @set_tx: configure this key as the default Tx key (only used when
 310          *      driver does not support separate unicast/individual key
 311          * @seq: sequence number/packet number, seq_len octets, the next
 312          *      packet number to be used for in replay protection; configured
 313          *      for Rx keys (in most cases, this is only used with broadcast
 314          *      keys and set to zero for unicast keys)
 315          * @seq_len: length of the seq, depends on the algorithm:
 316          *      TKIP: 6 octets, CCMP: 6 octets, IGTK: 6 octets
 317          * @key: key buffer; TKIP: 16-byte temporal key, 8-byte Tx Mic key,
 318          *      8-byte Rx Mic Key
 319          * @key_len: length of the key buffer in octets (WEP: 5 or 13,
 320          *      TKIP: 32, CCMP: 16, IGTK: 16, DHV: 16)
 321          *
 322          * Returns: 0 on success, -1 on failure
 323          *
 324          * Configure the given key for the kernel driver. If the driver
 325          * supports separate individual keys (4 default keys + 1 individual),
 326          * addr can be used to determine whether the key is default or
 327          * individual. If only 4 keys are supported, the default key with key
 328          * index 0 is used as the individual key. STA must be configured to use
 329          * it as the default Tx key (set_tx is set) and accept Rx for all the
 330          * key indexes. In most cases, WPA uses only key indexes 1 and 2 for
 331          * broadcast keys, so key index 0 is available for this kind of
 332          * configuration.
 333          *
 334          * Please note that TKIP keys include separate TX and RX MIC keys and
 335          * some drivers may expect them in different order than wpa_supplicant
 336          * is using. If the TX/RX keys are swapped, all TKIP encrypted packets
 337          * will tricker Michael MIC errors. This can be fixed by changing the
 338          * order of MIC keys by swapping te bytes 16..23 and 24..31 of the key
 339          * in driver_*.c set_key() implementation, see driver_ndis.c for an
 340          * example on how this can be done.
 341          */
 342         int (*set_key)(void *priv, wpa_alg alg, const u8 *addr,
 343                        int key_idx, int set_tx, const u8 *seq, size_t seq_len,
 344                        const u8 *key, size_t key_len);
 345
 346         /**
 347          * init - Initialize driver interface
 348          * @ctx: context to be used when calling wpa_supplicant functions,
 349          * e.g., wpa_supplicant_event()
 350          * @ifname: interface name, e.g., wlan0
 351          *
 352          * Returns: Pointer to private data, %NULL on failure
 353          *
 354          * Initialize driver interface, including event processing for kernel
 355          * driver events (e.g., associated, scan results, Michael MIC failure).
 356          * This function can allocate a private configuration data area for
 357          * @ctx, file descriptor, interface name, etc. information that may be
 358          * needed in future driver operations. If this is not used, non-NULL
 359          * value will need to be returned because %NULL is used to indicate
 360          * failure. The returned value will be used as 'void *priv' data for
 361          * all other driver_ops functions.
 362          *
 363          * The main event loop (eloop.c) of wpa_supplicant can be used to
 364          * register callback for read sockets (eloop_register_read_sock()).
 365          *
 366          * See wpa_supplicant.h for more information about events and
 367          * wpa_supplicant_event() function.
 368          */
 369         void * (*init)(void *ctx, const char *ifname);
 370
 371         /**
 372          * deinit - Deinitialize driver interface
 373          * @priv: private driver interface data from init()
 374          *
 375          * Shut down driver interface and processing of driver events. Free
 376          * private data buffer if one was allocated in init() handler.
 377          */
 378         void (*deinit)(void *priv);
 379
 380         /**
 381          * set_param - Set driver configuration parameters
 382          * @priv: private driver interface data from init()
 383          * @param: driver specific configuration parameters
 384          *
 385          * Returns: 0 on success, -1 on failure
 386          *
 387          * Optional handler for notifying driver interface about configuration
 388          * parameters (driver_param).
 389          */
 390         int (*set_param)(void *priv, const char *param);
 391
 392         /**
 393          * set_countermeasures - Enable/disable TKIP countermeasures
 394          * @priv: private driver interface data
 395          * @enabled: 1 = countermeasures enabled, 0 = disabled
 396          *
 397          * Returns: 0 on success, -1 on failure
 398          *
 399          * Configure TKIP countermeasures. When these are enabled, the driver
 400          * should drop all received and queued frames that are using TKIP.
 401          */
 402         int (*set_countermeasures)(void *priv, int enabled);
 403
 404         /**
 405          * set_drop_unencrypted - Enable/disable unencrypted frame filtering
 406          * @priv: private driver interface data
 407          * @enabled: 1 = unencrypted Tx/Rx frames will be dropped, 0 = disabled
 408          *
 409          * Returns: 0 on success, -1 on failure
 410          *
 411          * Configure the driver to drop all non-EAPOL frames (both receive and
 412          * transmit paths). Unencrypted EAPOL frames (ethertype 0x888e) must
 413          * still be allowed for key negotiation.
 414          */
 415         int (*set_drop_unencrypted)(void *priv, int enabled);
 416
 417         /**
 418          * scan - Request the driver to initiate scan
 419          * @priv: private driver interface data
 420          * @ssid: specific SSID to scan for (ProbeReq) or %NULL to scan for
 421          *      all SSIDs (either active scan with broadcast SSID or passive
 422          *      scan
 423          * @ssid_len: length of the SSID
 424          *
 425          * Returns: 0 on success, -1 on failure
 426          *
 427          * Once the scan results are ready, the driver should report scan
 428          * results event for wpa_supplicant which will eventually request the
 429          * results with wpa_driver_get_scan_results().
 430          */
 431         int (*scan)(void *priv, const u8 *ssid, size_t ssid_len);
 432
 433         /**
 434          * get_scan_results - Fetch the latest scan results
 435          * @priv: private driver interface data
 436          * @results: pointer to buffer for scan results
 437          * @max_size: maximum number of entries (buffer size)
 438          *
 439          * Returns: Number of scan result entries used on success, -1 on
 440          * failure
 441          *
 442          * If scan results include more than max_size BSSes, max_size will be
 443          * returned and the remaining entries will not be included in the
 444          * buffer.
 445          */
 446         int (*get_scan_results)(void *priv,
 447                                 struct wpa_scan_result *results,
 448                                 size_t max_size);
 449
 450         /**
 451          * deauthenticate - Request driver to deauthenticate
 452          * @priv: private driver interface data
 453          * @addr: peer address (BSSID of the AP)
 454          * @reason_code: 16-bit reason code to be sent in the deauthentication
 455          *      frame
 456          *
 457          * Returns: 0 on success, -1 on failure
 458          */
 459         int (*deauthenticate)(void *priv, const u8 *addr, int reason_code);
 460
 461         /**
 462          * disassociate - Request driver to disassociate
 463          * @priv: private driver interface data
 464          * @addr: peer address (BSSID of the AP)
 465          * @reason_code: 16-bit reason code to be sent in the disassociation
 466          *      frame
 467          *
 468          * Returns: 0 on success, -1 on failure
 469          */
 470         int (*disassociate)(void *priv, const u8 *addr, int reason_code);
 471
 472         /**
 473          * associate - Request driver to associate
 474          * @priv: private driver interface data
 475          * @params: association parameters
 476          *
 477          * Returns: 0 on success, -1 on failure
 478          */
 479         int (*associate)(void *priv,
 480                          struct wpa_driver_associate_params *params);
 481
 482         /**
 483          * set_auth_alg - Set IEEE 802.11 authentication algorithm
 484          * @priv: private driver interface data
 485          * @auth_alg: bit field of AUTH_ALG_*
 486          *
 487          * If the driver supports more than one authentication algorithm at the
 488          * same time, it should configure all supported algorithms. If not, one
 489          * algorithm needs to be selected arbitrarily. Open System
 490          * authentication should be ok for most cases and it is recommended to
 491          * be used if other options are not supported. Static WEP configuration
 492          * may also use Shared Key authentication and LEAP requires its own
 493          * algorithm number. For LEAP, user can make sure that only one
 494          * algorithm is used at a time by configuring LEAP as the only
 495          * supported EAP method. This information is also available in
 496          * associate() params, so set_auth_alg may not be needed in case of
 497          * most drivers.
 498          *
 499          * Returns: 0 on success, -1 on failure
 500          */
 501         int (*set_auth_alg)(void *priv, int auth_alg);
 502
 503         /**
 504          * add_pmkid - Add PMKSA cache entry to the driver
 505          * @priv: private driver interface data
 506          * @bssid: BSSID for the PMKSA cache entry
 507          * @pmkid: PMKID for the PMKSA cache entry
 508          *
 509          * Returns: 0 on success, -1 on failure
 510          *
 511          * This function is called when a new PMK is received, as a result of
 512          * either normal authentication or RSN pre-authentication.
 513          *
 514          * If the driver generates RSN IE, i.e., it does not use wpa_ie in
 515          * associate(), add_pmkid() can be used to add new PMKSA cache entries
 516          * in the driver. If the driver uses wpa_ie from wpa_supplicant, this
 517          * driver_ops function does not need to be implemented. Likewise, if
 518          * the driver does not support WPA, this function is not needed.
 519          */
 520         int (*add_pmkid)(void *priv, const u8 *bssid, const u8 *pmkid);
 521
 522         /**
 523          * remove_pmkid - Remove PMKSA cache entry to the driver
 524          * @priv: private driver interface data
 525          * @bssid: BSSID for the PMKSA cache entry
 526          * @pmkid: PMKID for the PMKSA cache entry
 527          *
 528          * Returns: 0 on success, -1 on failure
 529          *
 530          * This function is called when the supplicant drops a PMKSA cache
 531          * entry for any reason.
 532          *
 533          * If the driver generates RSN IE, i.e., it does not use wpa_ie in
 534          * associate(), remove_pmkid() can be used to synchronize PMKSA caches
 535          * between the driver and wpa_supplicant. If the driver uses wpa_ie
 536          * from wpa_supplicant, this driver_ops function does not need to be
 537          * implemented. Likewise, if the driver does not support WPA, this
 538          * function is not needed.
 539          */
 540         int (*remove_pmkid)(void *priv, const u8 *bssid, const u8 *pmkid);
 541
 542         /**
 543          * flush_pmkid - Flush PMKSA cache
 544          * @priv: private driver interface data
 545          *
 546          * Returns: 0 on success, -1 on failure
 547          *
 548          * This function is called when the supplicant drops all PMKSA cache
 549          * entries for any reason.
 550          *
 551          * If the driver generates RSN IE, i.e., it does not use wpa_ie in
 552          * associate(), remove_pmkid() can be used to synchronize PMKSA caches
 553          * between the driver and wpa_supplicant. If the driver uses wpa_ie
 554          * from wpa_supplicant, this driver_ops function does not need to be
 555          * implemented. Likewise, if the driver does not support WPA, this
 556          * function is not needed.
 557          */
 558         int (*flush_pmkid)(void *priv);
 559
 560         /**
 561          * flush_pmkid - Flush PMKSA cache
 562          * @priv: private driver interface data
 563          *
 564          * Returns: 0 on success, -1 on failure
 565          *
 566          * Get driver/firmware/hardware capabilities.
 567          */
 568         int (*get_capa)(void *priv, struct wpa_driver_capa *capa);
 569
 570         /**
 571          * poll - Poll driver for association information
 572          * @priv: private driver interface data
 573          *
 574          * This is an option callback that can be used when the driver does not
 575          * provide event mechanism for association events. This is called when
 576          * receiving WPA EAPOL-Key messages that require association
 577          * information. The driver interface is supposed to generate associnfo
 578          * event before returning from this callback function. In addition, the
 579          * driver interface should generate an association event after having
 580          * sent out associnfo.
 581          */
 582         void (*poll)(void *priv);
 583
 584         /**
 585          * get_ifname - Get interface name
 586          * @priv: private driver interface data
 587          *
 588          * Returns: Pointer to the interface name. This can differ from the
 589          * interface name used in init() call.
 590          *
 591          * This optional function can be used to allow the driver interface to
 592          * replace the interface name with something else, e.g., based on an
 593          * interface mapping from a more descriptive name.
 594          */
 595         const char * (*get_ifname)(void *priv);
 596
 597         /**
 598          * get_mac_addr - Get own MAC address
 599          * @priv: private driver interface data
 600          *
 601          * Returns: Pointer to own MAC address or %NULL on failure
 602          *
 603          * This optional function can be used to get the own MAC address of the
 604          * device from the driver interface code. This is only needed if the
 605          * l2_packet implementation for the OS does not provide easy access to
 606          * a MAC address. */
 607         const u8 * (*get_mac_addr)(void *priv);
 608
 609         /**
 610          * send_eapol - Optional function for sending EAPOL packets
 611          * @priv: private driver interface data
 612          * @dest: Destination MAC address
 613          * @proto: Ethertype
 614          * @data: EAPOL packet starting with IEEE 802.1X header
 615          * @data_len: Size of the EAPOL packet
 616          *
 617          * Returns: 0 on success, -1 on failure
 618          *
 619          * This optional function can be used to override l2_packet operations
 620          * with driver specific functionality. If this function pointer is set,
 621          * l2_packet module is not used at all and the driver interface code is
 622          * responsible for receiving and sending all EAPOL packets. The
 623          * received EAPOL packets are sent to core code by calling
 624          * wpa_supplicant_rx_eapol(). The driver interface is required to
 625          * implement get_mac_addr() handler if send_eapol() is used.
 626          */
 627         int (*send_eapol)(void *priv, const u8 *dest, u16 proto,
 628                           const u8 *data, size_t data_len);
 629
 630         /**
 631          * set_operstate - Sets device operating state to DORMANT or UP
 632          * @priv: private driver interface data
 633          * @state: 0 = dormant, 1 = up
 634          * Returns: 0 on success, -1 on failure
 635          *
 636          * This is an optional function that can be used on operating systems
 637          * that support a concept of controlling network device state from user
 638          * space applications. This function, if set, gets called with
 639          * state = 1 when authentication has been completed and with state = 0
 640          * when connection is lost.
 641          */
 642         int (*set_operstate)(void *priv, int state);
 643
 644         /**
 645          * mlme_setprotection - MLME-SETPROTECTION.request primitive
 646          * @priv: Private driver interface data
 647          * @addr: Address of the station for which to set protection (may be
 648          * %NULL for group keys)
 649          * @protect_type: MLME_SETPROTECTION_PROTECT_TYPE_*
 650          * @key_type: MLME_SETPROTECTION_KEY_TYPE_*
 651          * Returns: 0 on success, -1 on failure
 652          *
 653          * This is an optional function that can be used to set the driver to
 654          * require protection for Tx and/or Rx frames. This uses the layer
 655          * interface defined in IEEE 802.11i-2004 clause 10.3.22.1
 656          * (MLME-SETPROTECTION.request). Many drivers do not use explicit
 657          * set protection operation; instead, they set protection implicitly
 658          * based on configured keys.
 659          */
 660         int (*mlme_setprotection)(void *priv, const u8 *addr, int protect_type,
 661                                   int key_type);
 662
 663         /**
 664          * get_hw_feature_data - Get hardware support data (channels and rates)
 665          * @priv: Private driver interface data
 666          * @num_modes: Variable for returning the number of returned modes
 667          * flags: Variable for returning hardware feature flags
 668          * Returns: Pointer to allocated hardware data on success or %NULL on
 669          * failure. Caller is responsible for freeing this.
 670          *
 671          * This function is only needed for drivers that export MLME
 672          * (management frame processing) to wpa_supplicant.
 673          */
 674         struct wpa_hw_modes * (*get_hw_feature_data)(void *priv,
 675                                                      u16 *num_modes,
 676                                                      u16 *flags);
 677
 678         /**
 679          * set_channel - Set channel
 680          * @priv: Private driver interface data
 681          * @phymode: WPA_MODE_IEEE80211B, ..
 682          * @chan: IEEE 802.11 channel number
 683          * @freq: Frequency of the channel in MHz
 684          * Returns: 0 on success, -1 on failure
 685          *
 686          * This function is only needed for drivers that export MLME
 687          * (management frame processing) to wpa_supplicant.
 688          */
 689         int (*set_channel)(void *priv, wpa_hw_mode phymode, int chan,
 690                            int freq);
 691
 692         /**
 693          * set_ssid - Set SSID
 694          * @priv: Private driver interface data
 695          * @ssid: SSID
 696          * @ssid_len: SSID length
 697          * Returns: 0 on success, -1 on failure
 698          *
 699          * This function is only needed for drivers that export MLME
 700          * (management frame processing) to wpa_supplicant.
 701          */
 702         int (*set_ssid)(void *priv, const u8 *ssid, size_t ssid_len);
 703
 704         /**
 705          * set_bssid - Set BSSID
 706          * @priv: Private driver interface data
 707          * @bssid: BSSID
 708          * Returns: 0 on success, -1 on failure
 709          *
 710          * This function is only needed for drivers that export MLME
 711          * (management frame processing) to wpa_supplicant.
 712          */
 713         int (*set_bssid)(void *priv, const u8 *bssid);
 714
 715         /**
 716          * send_mlme - Send management frame from MLME
 717          * @priv: Private driver interface data
 718          * @data: IEEE 802.11 management frame with IEEE 802.11 header
 719          * @data_len: Size of the management frame
 720          * Returns: 0 on success, -1 on failure
 721          *
 722          * This function is only needed for drivers that export MLME
 723          * (management frame processing) to wpa_supplicant.
 724          */
 725         int (*send_mlme)(void *priv, const u8 *data, size_t data_len);
 726
 727         /**
 728          * mlme_add_sta - Add a STA entry into the driver/netstack
 729          * @priv: Private driver interface data
 730          * @addr: MAC address of the STA (e.g., BSSID of the AP)
 731          * @supp_rates: Supported rate set (from (Re)AssocResp); in IEEE 802.11
 732          * format (one octet per rate, 1 = 0.5 Mbps)
 733          * @supp_rates_len: Number of entries in supp_rates
 734          * Returns: 0 on success, -1 on failure
 735          *
 736          * This function is only needed for drivers that export MLME
 737          * (management frame processing) to wpa_supplicant. When the MLME code
 738          * completes association with an AP, this function is called to
 739          * configure the driver/netstack with a STA entry for data frame
 740          * processing (TX rate control, encryption/decryption).
 741          */
 742          int (*mlme_add_sta)(void *priv, const u8 *addr, const u8 *supp_rates,
 743                              size_t supp_rates_len);
 744
 745         /**
 746          * mlme_remove_sta - Remove a STA entry from the driver/netstack
 747          * @priv: Private driver interface data
 748          * @addr: MAC address of the STA (e.g., BSSID of the AP)
 749          * Returns: 0 on success, -1 on failure
 750          *
 751          * This function is only needed for drivers that export MLME
 752          * (management frame processing) to wpa_supplicant.
 753          */
 754          int (*mlme_remove_sta)(void *priv, const u8 *addr);
 755 };
 756
 757 #endif /* DRIVER_H */