2 * WPA Supplicant - driver interface definition
3 * Copyright (c) 2003-2009, Jouni Malinen <j@w1.fi>
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.
9 * Alternatively, this software may be distributed under the terms of BSD
12 * See README and COPYING for more details.
18 #define WPA_SUPPLICANT_DRIVER_VERSION 3
22 #define AUTH_ALG_OPEN_SYSTEM 0x01
23 #define AUTH_ALG_SHARED_KEY 0x02
24 #define AUTH_ALG_LEAP 0x04
25 #define AUTH_ALG_FT 0x08
27 #define IEEE80211_MODE_INFRA 0
28 #define IEEE80211_MODE_IBSS 1
30 #define IEEE80211_CAP_ESS 0x0001
31 #define IEEE80211_CAP_IBSS 0x0002
32 #define IEEE80211_CAP_PRIVACY 0x0010
34 #define SSID_MAX_WPA_IE_LEN 40
36 * struct wpa_scan_result - Scan results (old structure)
39 * @ssid_len: length of the ssid
41 * @wpa_ie_len: length of the wpa_ie
43 * @rsn_ie_len: length of the RSN IE
44 * @freq: frequency of the channel in MHz (e.g., 2412 = channel 1)
45 * @caps: capability information field in host byte order
46 * @qual: signal quality
48 * @level: signal level
49 * @maxrate: maximum supported rate
50 * @mdie_present: Whether MDIE was included in Beacon/ProbeRsp frame
51 * @mdie: Mobility domain identifier IE (IEEE 802.11r MDIE) (starting from
55 * This structure is used as a generic format for scan results from the
56 * driver. Each driver interface implementation is responsible for converting
57 * the driver or OS specific scan results into this format.
59 * This structure is the old data structure used for scan results. It is
60 * obsoleted by the new struct wpa_scan_res structure and the old version is
61 * only included for backwards compatibility with existing driver wrapper
62 * implementations. New implementations are encouraged to implement for struct
63 * wpa_scan_res. The old structure will be removed at some point.
65 struct wpa_scan_result {
69 u8 wpa_ie[SSID_MAX_WPA_IE_LEN];
71 u8 rsn_ie[SSID_MAX_WPA_IE_LEN];
85 #define WPA_SCAN_QUAL_INVALID BIT(0)
86 #define WPA_SCAN_NOISE_INVALID BIT(1)
87 #define WPA_SCAN_LEVEL_INVALID BIT(2)
88 #define WPA_SCAN_LEVEL_DBM BIT(3)
91 * struct wpa_scan_res - Scan result for an BSS/IBSS
92 * @flags: information flags about the BSS/IBSS (WPA_SCAN_*)
94 * @freq: frequency of the channel in MHz (e.g., 2412 = channel 1)
95 * @beacon_int: beacon interval in TUs (host byte order)
96 * @caps: capability information field in host byte order
97 * @qual: signal quality
99 * @level: signal level
101 * @ie_len: length of the following IE field in octets
103 * This structure is used as a generic format for scan results from the
104 * driver. Each driver interface implementation is responsible for converting
105 * the driver or OS specific scan results into this format.
107 * If the driver does not support reporting all IEs, the IE data structure is
108 * constructed of the IEs that are available. This field will also need to
109 * include SSID in IE format. All drivers are encouraged to be extended to
110 * report all IEs to make it easier to support future additions.
112 struct wpa_scan_res {
123 /* followed by ie_len octets of IEs */
127 * struct wpa_scan_results - Scan results
128 * @res: Array of pointers to allocated variable length scan result entries
129 * @num: Number of entries in the scan result array
131 struct wpa_scan_results {
132 struct wpa_scan_res **res;
137 * struct wpa_interface_info - Network interface information
138 * @next: Pointer to the next interface or NULL if this is the last one
139 * @ifname: Interface name that can be used with init() or init2()
140 * @desc: Human readable adapter description (e.g., vendor/model) or NULL if
142 * @drv_bame: struct wpa_driver_ops::name (note: unlike other strings, this one
143 * is not an allocated copy, i.e., get_interfaces() caller will not free
146 struct wpa_interface_info {
147 struct wpa_interface_info *next;
150 const char *drv_name;
153 #define WPAS_MAX_SCAN_SSIDS 4
156 * struct wpa_driver_scan_params - Scan parameters
157 * Data for struct wpa_driver_ops::scan2().
159 struct wpa_driver_scan_params {
161 * ssids - SSIDs to scan for
163 struct wpa_driver_scan_ssid {
165 * ssid - specific SSID to scan for (ProbeReq)
166 * %NULL or zero-length SSID is used to indicate active scan
167 * with wildcard SSID.
171 * ssid_len: Length of the SSID in octets
174 } ssids[WPAS_MAX_SCAN_SSIDS];
177 * num_ssids - Number of entries in ssids array
178 * Zero indicates a request for a passive scan.
183 * extra_ies - Extra IE(s) to add into Probe Request or %NULL
188 * extra_ies_len - Length of extra_ies in octets
190 size_t extra_ies_len;
193 * freqs - Array of frequencies to scan or %NULL for all frequencies
195 * The frequency is set in MHz. The array is zero-terminated.
201 * struct wpa_driver_auth_params - Authentication parameters
202 * Data for struct wpa_driver_ops::authenticate().
204 struct wpa_driver_auth_params {
215 * struct wpa_driver_associate_params - Association parameters
216 * Data for struct wpa_driver_ops::associate().
218 struct wpa_driver_associate_params {
220 * bssid - BSSID of the selected AP
221 * This can be %NULL, if ap_scan=2 mode is used and the driver is
222 * responsible for selecting with which BSS to associate. */
226 * ssid - The selected SSID
232 * freq - Frequency of the channel the selected AP is using
233 * Frequency that the selected AP is using (in MHz as
234 * reported in the scan results)
239 * wpa_ie - WPA information element for (Re)Association Request
240 * WPA information element to be included in (Re)Association
241 * Request (including information element id and length). Use
242 * of this WPA IE is optional. If the driver generates the WPA
243 * IE, it can use pairwise_suite, group_suite, and
244 * key_mgmt_suite to select proper algorithms. In this case,
245 * the driver has to notify wpa_supplicant about the used WPA
246 * IE by generating an event that the interface code will
247 * convert into EVENT_ASSOCINFO data (see below).
249 * When using WPA2/IEEE 802.11i, wpa_ie is used for RSN IE
250 * instead. The driver can determine which version is used by
251 * looking at the first byte of the IE (0xdd for WPA, 0x30 for
254 * When using WPS, wpa_ie is used for WPS IE instead of WPA/RSN IE.
258 * wpa_ie_len - length of the wpa_ie
262 /* The selected pairwise/group cipher and key management
263 * suites. These are usually ignored if @wpa_ie is used. */
264 wpa_cipher pairwise_suite;
265 wpa_cipher group_suite;
266 wpa_key_mgmt key_mgmt_suite;
269 * auth_alg - Allowed authentication algorithms
270 * Bit field of AUTH_ALG_*
275 * mode - Operation mode (infra/ibss) IEEE80211_MODE_*
280 * wep_key - WEP keys for static WEP configuration
282 const u8 *wep_key[4];
285 * wep_key_len - WEP key length for static WEP configuration
287 size_t wep_key_len[4];
290 * wep_tx_keyidx - WEP TX key index for static WEP configuration
295 * mgmt_frame_protection - IEEE 802.11w management frame protection
298 NO_MGMT_FRAME_PROTECTION,
299 MGMT_FRAME_PROTECTION_OPTIONAL,
300 MGMT_FRAME_PROTECTION_REQUIRED
301 } mgmt_frame_protection;
304 * ft_ies - IEEE 802.11r / FT information elements
305 * If the supplicant is using IEEE 802.11r (FT) and has the needed keys
306 * for fast transition, this parameter is set to include the IEs that
307 * are to be sent in the next FT Authentication Request message.
308 * update_ft_ies() handler is called to update the IEs for further
309 * FT messages in the sequence.
311 * The driver should use these IEs only if the target AP is advertising
312 * the same mobility domain as the one included in the MDIE here.
314 * In ap_scan=2 mode, the driver can use these IEs when moving to a new
315 * AP after the initial association. These IEs can only be used if the
316 * target AP is advertising support for FT and is using the same MDIE
317 * and SSID as the current AP.
319 * The driver is responsible for reporting the FT IEs received from the
320 * AP's response using wpa_supplicant_event() with EVENT_FT_RESPONSE
321 * type. update_ft_ies() handler will then be called with the FT IEs to
322 * include in the next frame in the authentication sequence.
327 * ft_ies_len - Length of ft_ies in bytes
332 * ft_md - FT Mobility domain (6 octets) (also included inside ft_ies)
334 * This value is provided to allow the driver interface easier access
335 * to the current mobility domain. This value is set to %NULL if no
336 * mobility domain is currently active.
341 * passphrase - RSN passphrase for PSK
343 * This value is made available only for WPA/WPA2-Personal (PSK) and
344 * only for drivers that set WPA_DRIVER_FLAGS_4WAY_HANDSHAKE. This is
345 * the 8..63 character ASCII passphrase, if available. Please note that
346 * this can be %NULL if passphrase was not used to generate the PSK. In
347 * that case, the psk field must be used to fetch the PSK.
349 const char *passphrase;
352 * psk - RSN PSK (alternative for passphrase for PSK)
354 * This value is made available only for WPA/WPA2-Personal (PSK) and
355 * only for drivers that set WPA_DRIVER_FLAGS_4WAY_HANDSHAKE. This is
356 * the 32-octet (256-bit) PSK, if available. The driver wrapper should
357 * be prepared to handle %NULL value as an error.
362 * drop_unencrypted - Enable/disable unencrypted frame filtering
364 * Configure the driver to drop all non-EAPOL frames (both receive and
365 * transmit paths). Unencrypted EAPOL frames (ethertype 0x888e) must
366 * still be allowed for key negotiation.
368 int drop_unencrypted;
372 * struct wpa_driver_capa - Driver capability information
374 struct wpa_driver_capa {
375 #define WPA_DRIVER_CAPA_KEY_MGMT_WPA 0x00000001
376 #define WPA_DRIVER_CAPA_KEY_MGMT_WPA2 0x00000002
377 #define WPA_DRIVER_CAPA_KEY_MGMT_WPA_PSK 0x00000004
378 #define WPA_DRIVER_CAPA_KEY_MGMT_WPA2_PSK 0x00000008
379 #define WPA_DRIVER_CAPA_KEY_MGMT_WPA_NONE 0x00000010
380 #define WPA_DRIVER_CAPA_KEY_MGMT_FT 0x00000020
381 #define WPA_DRIVER_CAPA_KEY_MGMT_FT_PSK 0x00000040
382 unsigned int key_mgmt;
384 #define WPA_DRIVER_CAPA_ENC_WEP40 0x00000001
385 #define WPA_DRIVER_CAPA_ENC_WEP104 0x00000002
386 #define WPA_DRIVER_CAPA_ENC_TKIP 0x00000004
387 #define WPA_DRIVER_CAPA_ENC_CCMP 0x00000008
390 #define WPA_DRIVER_AUTH_OPEN 0x00000001
391 #define WPA_DRIVER_AUTH_SHARED 0x00000002
392 #define WPA_DRIVER_AUTH_LEAP 0x00000004
395 /* Driver generated WPA/RSN IE */
396 #define WPA_DRIVER_FLAGS_DRIVER_IE 0x00000001
397 #define WPA_DRIVER_FLAGS_SET_KEYS_AFTER_ASSOC 0x00000002
398 #define WPA_DRIVER_FLAGS_USER_SPACE_MLME 0x00000004
399 /* Driver takes care of RSN 4-way handshake internally; PMK is configured with
400 * struct wpa_driver_ops::set_key using alg = WPA_ALG_PMK */
401 #define WPA_DRIVER_FLAGS_4WAY_HANDSHAKE 0x00000008
402 #define WPA_DRIVER_FLAGS_WIRED 0x00000010
403 /* Driver provides separate commands for authentication and association (SME in
404 * wpa_supplicant). */
405 #define WPA_DRIVER_FLAGS_SME 0x00000020
406 /* Driver supports AP mode */
407 #define WPA_DRIVER_FLAGS_AP 0x00000040
414 struct ieee80211_rx_status {
421 * struct wpa_driver_ops - Driver interface API definition
423 * This structure defines the API that each driver interface needs to implement
424 * for core wpa_supplicant code. All driver specific functionality is captured
427 struct wpa_driver_ops {
428 /** Name of the driver interface */
430 /** One line description of the driver interface */
434 * get_bssid - Get the current BSSID
435 * @priv: private driver interface data
436 * @bssid: buffer for BSSID (ETH_ALEN = 6 bytes)
438 * Returns: 0 on success, -1 on failure
440 * Query kernel driver for the current BSSID and copy it to bssid.
441 * Setting bssid to 00:00:00:00:00:00 is recommended if the STA is not
444 int (*get_bssid)(void *priv, u8 *bssid);
447 * get_ssid - Get the current SSID
448 * @priv: private driver interface data
449 * @ssid: buffer for SSID (at least 32 bytes)
451 * Returns: Length of the SSID on success, -1 on failure
453 * Query kernel driver for the current SSID and copy it to ssid.
454 * Returning zero is recommended if the STA is not associated.
456 * Note: SSID is an array of octets, i.e., it is not nul terminated and
457 * can, at least in theory, contain control characters (including nul)
458 * and as such, should be processed as binary data, not a printable
461 int (*get_ssid)(void *priv, u8 *ssid);
464 * set_wpa - Enable/disable WPA support (OBSOLETE)
465 * @priv: private driver interface data
466 * @enabled: 1 = enable, 0 = disable
468 * Returns: 0 on success, -1 on failure
470 * Note: This function is included for backwards compatibility. This is
471 * called only just after init and just before deinit, so these
472 * functions can be used to implement same functionality and the driver
473 * interface need not define this function.
475 * Configure the kernel driver to enable/disable WPA support. This may
476 * be empty function, if WPA support is always enabled. Common
477 * configuration items are WPA IE (clearing it when WPA support is
478 * disabled), Privacy flag configuration for capability field (note:
479 * this the value need to set in associate handler to allow plaintext
480 * mode to be used) when trying to associate with, roaming mode (can
481 * allow wpa_supplicant to control roaming if ap_scan=1 is used;
482 * however, drivers can also implement roaming if desired, especially
483 * ap_scan=2 mode is used for this).
485 int (*set_wpa)(void *priv, int enabled);
488 * set_key - Configure encryption key
489 * @priv: private driver interface data
490 * @alg: encryption algorithm (%WPA_ALG_NONE, %WPA_ALG_WEP,
491 * %WPA_ALG_TKIP, %WPA_ALG_CCMP, %WPA_ALG_IGTK, %WPA_ALG_PMK);
492 * %WPA_ALG_NONE clears the key.
493 * @addr: address of the peer STA or ff:ff:ff:ff:ff:ff for
494 * broadcast/default keys
495 * @key_idx: key index (0..3), usually 0 for unicast keys; 0..4095 for
497 * @set_tx: configure this key as the default Tx key (only used when
498 * driver does not support separate unicast/individual key
499 * @seq: sequence number/packet number, seq_len octets, the next
500 * packet number to be used for in replay protection; configured
501 * for Rx keys (in most cases, this is only used with broadcast
502 * keys and set to zero for unicast keys)
503 * @seq_len: length of the seq, depends on the algorithm:
504 * TKIP: 6 octets, CCMP: 6 octets, IGTK: 6 octets
505 * @key: key buffer; TKIP: 16-byte temporal key, 8-byte Tx Mic key,
507 * @key_len: length of the key buffer in octets (WEP: 5 or 13,
508 * TKIP: 32, CCMP: 16, IGTK: 16)
510 * Returns: 0 on success, -1 on failure
512 * Configure the given key for the kernel driver. If the driver
513 * supports separate individual keys (4 default keys + 1 individual),
514 * addr can be used to determine whether the key is default or
515 * individual. If only 4 keys are supported, the default key with key
516 * index 0 is used as the individual key. STA must be configured to use
517 * it as the default Tx key (set_tx is set) and accept Rx for all the
518 * key indexes. In most cases, WPA uses only key indexes 1 and 2 for
519 * broadcast keys, so key index 0 is available for this kind of
522 * Please note that TKIP keys include separate TX and RX MIC keys and
523 * some drivers may expect them in different order than wpa_supplicant
524 * is using. If the TX/RX keys are swapped, all TKIP encrypted packets
525 * will tricker Michael MIC errors. This can be fixed by changing the
526 * order of MIC keys by swapping te bytes 16..23 and 24..31 of the key
527 * in driver_*.c set_key() implementation, see driver_ndis.c for an
528 * example on how this can be done.
530 int (*set_key)(void *priv, wpa_alg alg, const u8 *addr,
531 int key_idx, int set_tx, const u8 *seq, size_t seq_len,
532 const u8 *key, size_t key_len);
535 * init - Initialize driver interface
536 * @ctx: context to be used when calling wpa_supplicant functions,
537 * e.g., wpa_supplicant_event()
538 * @ifname: interface name, e.g., wlan0
540 * Returns: Pointer to private data, %NULL on failure
542 * Initialize driver interface, including event processing for kernel
543 * driver events (e.g., associated, scan results, Michael MIC failure).
544 * This function can allocate a private configuration data area for
545 * @ctx, file descriptor, interface name, etc. information that may be
546 * needed in future driver operations. If this is not used, non-NULL
547 * value will need to be returned because %NULL is used to indicate
548 * failure. The returned value will be used as 'void *priv' data for
549 * all other driver_ops functions.
551 * The main event loop (eloop.c) of wpa_supplicant can be used to
552 * register callback for read sockets (eloop_register_read_sock()).
554 * See below for more information about events and
555 * wpa_supplicant_event() function.
557 void * (*init)(void *ctx, const char *ifname);
560 * deinit - Deinitialize driver interface
561 * @priv: private driver interface data from init()
563 * Shut down driver interface and processing of driver events. Free
564 * private data buffer if one was allocated in init() handler.
566 void (*deinit)(void *priv);
569 * set_param - Set driver configuration parameters
570 * @priv: private driver interface data from init()
571 * @param: driver specific configuration parameters
573 * Returns: 0 on success, -1 on failure
575 * Optional handler for notifying driver interface about configuration
576 * parameters (driver_param).
578 int (*set_param)(void *priv, const char *param);
581 * set_countermeasures - Enable/disable TKIP countermeasures
582 * @priv: private driver interface data
583 * @enabled: 1 = countermeasures enabled, 0 = disabled
585 * Returns: 0 on success, -1 on failure
587 * Configure TKIP countermeasures. When these are enabled, the driver
588 * should drop all received and queued frames that are using TKIP.
590 int (*set_countermeasures)(void *priv, int enabled);
593 * set_drop_unencrypted - Enable/disable unencrypted frame filtering
594 * @priv: private driver interface data
595 * @enabled: 1 = unencrypted Tx/Rx frames will be dropped, 0 = disabled
597 * Returns: 0 on success, -1 on failure
599 * Configure the driver to drop all non-EAPOL frames (both receive and
600 * transmit paths). Unencrypted EAPOL frames (ethertype 0x888e) must
601 * still be allowed for key negotiation.
603 * This function is deprecated. New driver wrapper implementations
604 * should use associate() parameter drop_unencrypted instead.
606 int (*set_drop_unencrypted)(void *priv, int enabled);
609 * scan - Request the driver to initiate scan (old version)
610 * @priv: private driver interface data
611 * @ssid: specific SSID to scan for (ProbeReq) or %NULL to scan for
612 * all SSIDs (either active scan with wildcard SSID or passive
614 * @ssid_len: length of the SSID
616 * Returns: 0 on success, -1 on failure
618 * Once the scan results are ready, the driver should report scan
619 * results event for wpa_supplicant which will eventually request the
620 * results with wpa_driver_get_scan_results().
622 * This function is deprecated. New driver wrapper implementations
623 * should implement support for scan2().
625 int (*scan)(void *priv, const u8 *ssid, size_t ssid_len);
628 * get_scan_results - Fetch the latest scan results (old version)
629 * @priv: private driver interface data
630 * @results: pointer to buffer for scan results
631 * @max_size: maximum number of entries (buffer size)
633 * Returns: Number of scan result entries used on success, -1 on
636 * If scan results include more than max_size BSSes, max_size will be
637 * returned and the remaining entries will not be included in the
640 * This function is deprecated. New driver wrapper implementations
641 * should implement support for get_scan_results2().
643 int (*get_scan_results)(void *priv,
644 struct wpa_scan_result *results,
648 * deauthenticate - Request driver to deauthenticate
649 * @priv: private driver interface data
650 * @addr: peer address (BSSID of the AP)
651 * @reason_code: 16-bit reason code to be sent in the deauthentication
654 * Returns: 0 on success, -1 on failure
656 int (*deauthenticate)(void *priv, const u8 *addr, int reason_code);
659 * disassociate - Request driver to disassociate
660 * @priv: private driver interface data
661 * @addr: peer address (BSSID of the AP)
662 * @reason_code: 16-bit reason code to be sent in the disassociation
665 * Returns: 0 on success, -1 on failure
667 int (*disassociate)(void *priv, const u8 *addr, int reason_code);
670 * associate - Request driver to associate
671 * @priv: private driver interface data
672 * @params: association parameters
674 * Returns: 0 on success, -1 on failure
676 int (*associate)(void *priv,
677 struct wpa_driver_associate_params *params);
680 * set_auth_alg - Set IEEE 802.11 authentication algorithm
681 * @priv: private driver interface data
682 * @auth_alg: bit field of AUTH_ALG_*
684 * If the driver supports more than one authentication algorithm at the
685 * same time, it should configure all supported algorithms. If not, one
686 * algorithm needs to be selected arbitrarily. Open System
687 * authentication should be ok for most cases and it is recommended to
688 * be used if other options are not supported. Static WEP configuration
689 * may also use Shared Key authentication and LEAP requires its own
690 * algorithm number. For LEAP, user can make sure that only one
691 * algorithm is used at a time by configuring LEAP as the only
692 * supported EAP method. This information is also available in
693 * associate() params, so set_auth_alg may not be needed in case of
696 * This function is deprecated. New driver wrapper implementations
697 * should use associate() parameter auth_alg instead.
699 * Returns: 0 on success, -1 on failure
701 int (*set_auth_alg)(void *priv, int auth_alg);
704 * add_pmkid - Add PMKSA cache entry to the driver
705 * @priv: private driver interface data
706 * @bssid: BSSID for the PMKSA cache entry
707 * @pmkid: PMKID for the PMKSA cache entry
709 * Returns: 0 on success, -1 on failure
711 * This function is called when a new PMK is received, as a result of
712 * either normal authentication or RSN pre-authentication.
714 * If the driver generates RSN IE, i.e., it does not use wpa_ie in
715 * associate(), add_pmkid() can be used to add new PMKSA cache entries
716 * in the driver. If the driver uses wpa_ie from wpa_supplicant, this
717 * driver_ops function does not need to be implemented. Likewise, if
718 * the driver does not support WPA, this function is not needed.
720 int (*add_pmkid)(void *priv, const u8 *bssid, const u8 *pmkid);
723 * remove_pmkid - Remove PMKSA cache entry to the driver
724 * @priv: private driver interface data
725 * @bssid: BSSID for the PMKSA cache entry
726 * @pmkid: PMKID for the PMKSA cache entry
728 * Returns: 0 on success, -1 on failure
730 * This function is called when the supplicant drops a PMKSA cache
731 * entry for any reason.
733 * If the driver generates RSN IE, i.e., it does not use wpa_ie in
734 * associate(), remove_pmkid() can be used to synchronize PMKSA caches
735 * between the driver and wpa_supplicant. If the driver uses wpa_ie
736 * from wpa_supplicant, this driver_ops function does not need to be
737 * implemented. Likewise, if the driver does not support WPA, this
738 * function is not needed.
740 int (*remove_pmkid)(void *priv, const u8 *bssid, const u8 *pmkid);
743 * flush_pmkid - Flush PMKSA cache
744 * @priv: private driver interface data
746 * Returns: 0 on success, -1 on failure
748 * This function is called when the supplicant drops all PMKSA cache
749 * entries for any reason.
751 * If the driver generates RSN IE, i.e., it does not use wpa_ie in
752 * associate(), remove_pmkid() can be used to synchronize PMKSA caches
753 * between the driver and wpa_supplicant. If the driver uses wpa_ie
754 * from wpa_supplicant, this driver_ops function does not need to be
755 * implemented. Likewise, if the driver does not support WPA, this
756 * function is not needed.
758 int (*flush_pmkid)(void *priv);
761 * get_capa - Get driver capabilities
762 * @priv: private driver interface data
764 * Returns: 0 on success, -1 on failure
766 * Get driver/firmware/hardware capabilities.
768 int (*get_capa)(void *priv, struct wpa_driver_capa *capa);
771 * poll - Poll driver for association information
772 * @priv: private driver interface data
774 * This is an option callback that can be used when the driver does not
775 * provide event mechanism for association events. This is called when
776 * receiving WPA EAPOL-Key messages that require association
777 * information. The driver interface is supposed to generate associnfo
778 * event before returning from this callback function. In addition, the
779 * driver interface should generate an association event after having
780 * sent out associnfo.
782 void (*poll)(void *priv);
785 * get_ifname - Get interface name
786 * @priv: private driver interface data
788 * Returns: Pointer to the interface name. This can differ from the
789 * interface name used in init() call. Init() is called first.
791 * This optional function can be used to allow the driver interface to
792 * replace the interface name with something else, e.g., based on an
793 * interface mapping from a more descriptive name.
795 const char * (*get_ifname)(void *priv);
798 * get_mac_addr - Get own MAC address
799 * @priv: private driver interface data
801 * Returns: Pointer to own MAC address or %NULL on failure
803 * This optional function can be used to get the own MAC address of the
804 * device from the driver interface code. This is only needed if the
805 * l2_packet implementation for the OS does not provide easy access to
807 const u8 * (*get_mac_addr)(void *priv);
810 * send_eapol - Optional function for sending EAPOL packets
811 * @priv: private driver interface data
812 * @dest: Destination MAC address
814 * @data: EAPOL packet starting with IEEE 802.1X header
815 * @data_len: Size of the EAPOL packet
817 * Returns: 0 on success, -1 on failure
819 * This optional function can be used to override l2_packet operations
820 * with driver specific functionality. If this function pointer is set,
821 * l2_packet module is not used at all and the driver interface code is
822 * responsible for receiving and sending all EAPOL packets. The
823 * received EAPOL packets are sent to core code by calling
824 * wpa_supplicant_rx_eapol(). The driver interface is required to
825 * implement get_mac_addr() handler if send_eapol() is used.
827 int (*send_eapol)(void *priv, const u8 *dest, u16 proto,
828 const u8 *data, size_t data_len);
831 * set_operstate - Sets device operating state to DORMANT or UP
832 * @priv: private driver interface data
833 * @state: 0 = dormant, 1 = up
834 * Returns: 0 on success, -1 on failure
836 * This is an optional function that can be used on operating systems
837 * that support a concept of controlling network device state from user
838 * space applications. This function, if set, gets called with
839 * state = 1 when authentication has been completed and with state = 0
840 * when connection is lost.
842 int (*set_operstate)(void *priv, int state);
845 * mlme_setprotection - MLME-SETPROTECTION.request primitive
846 * @priv: Private driver interface data
847 * @addr: Address of the station for which to set protection (may be
848 * %NULL for group keys)
849 * @protect_type: MLME_SETPROTECTION_PROTECT_TYPE_*
850 * @key_type: MLME_SETPROTECTION_KEY_TYPE_*
851 * Returns: 0 on success, -1 on failure
853 * This is an optional function that can be used to set the driver to
854 * require protection for Tx and/or Rx frames. This uses the layer
855 * interface defined in IEEE 802.11i-2004 clause 10.3.22.1
856 * (MLME-SETPROTECTION.request). Many drivers do not use explicit
857 * set protection operation; instead, they set protection implicitly
858 * based on configured keys.
860 int (*mlme_setprotection)(void *priv, const u8 *addr, int protect_type,
864 * get_hw_feature_data - Get hardware support data (channels and rates)
865 * @priv: Private driver interface data
866 * @num_modes: Variable for returning the number of returned modes
867 * flags: Variable for returning hardware feature flags
868 * Returns: Pointer to allocated hardware data on success or %NULL on
869 * failure. Caller is responsible for freeing this.
871 * This function is only needed for drivers that export MLME
872 * (management frame processing) to wpa_supplicant.
874 struct hostapd_hw_modes * (*get_hw_feature_data)(void *priv,
879 * set_channel - Set channel
880 * @priv: Private driver interface data
881 * @phymode: HOSTAPD_MODE_IEEE80211B, ..
882 * @chan: IEEE 802.11 channel number
883 * @freq: Frequency of the channel in MHz
884 * Returns: 0 on success, -1 on failure
886 * This function is only needed for drivers that export MLME
887 * (management frame processing) to wpa_supplicant.
889 int (*set_channel)(void *priv, hostapd_hw_mode phymode, int chan,
893 * set_ssid - Set SSID
894 * @priv: Private driver interface data
896 * @ssid_len: SSID length
897 * Returns: 0 on success, -1 on failure
899 * This function is only needed for drivers that export MLME
900 * (management frame processing) to wpa_supplicant.
902 int (*set_ssid)(void *priv, const u8 *ssid, size_t ssid_len);
905 * set_bssid - Set BSSID
906 * @priv: Private driver interface data
908 * Returns: 0 on success, -1 on failure
910 * This function is only needed for drivers that export MLME
911 * (management frame processing) to wpa_supplicant.
913 int (*set_bssid)(void *priv, const u8 *bssid);
916 * send_mlme - Send management frame from MLME
917 * @priv: Private driver interface data
918 * @data: IEEE 802.11 management frame with IEEE 802.11 header
919 * @data_len: Size of the management frame
920 * Returns: 0 on success, -1 on failure
922 * This function is only needed for drivers that export MLME
923 * (management frame processing) to wpa_supplicant.
925 int (*send_mlme)(void *priv, const u8 *data, size_t data_len);
928 * mlme_add_sta - Add a STA entry into the driver/netstack
929 * @priv: Private driver interface data
930 * @addr: MAC address of the STA (e.g., BSSID of the AP)
931 * @supp_rates: Supported rate set (from (Re)AssocResp); in IEEE 802.11
932 * format (one octet per rate, 1 = 0.5 Mbps)
933 * @supp_rates_len: Number of entries in supp_rates
934 * Returns: 0 on success, -1 on failure
936 * This function is only needed for drivers that export MLME
937 * (management frame processing) to wpa_supplicant. When the MLME code
938 * completes association with an AP, this function is called to
939 * configure the driver/netstack with a STA entry for data frame
940 * processing (TX rate control, encryption/decryption).
942 int (*mlme_add_sta)(void *priv, const u8 *addr, const u8 *supp_rates,
943 size_t supp_rates_len);
946 * mlme_remove_sta - Remove a STA entry from the driver/netstack
947 * @priv: Private driver interface data
948 * @addr: MAC address of the STA (e.g., BSSID of the AP)
949 * Returns: 0 on success, -1 on failure
951 * This function is only needed for drivers that export MLME
952 * (management frame processing) to wpa_supplicant.
954 int (*mlme_remove_sta)(void *priv, const u8 *addr);
957 * update_ft_ies - Update FT (IEEE 802.11r) IEs
958 * @priv: Private driver interface data
959 * @md: Mobility domain (2 octets) (also included inside ies)
960 * @ies: FT IEs (MDIE, FTIE, ...) or %NULL to remove IEs
961 * @ies_len: Length of FT IEs in bytes
962 * Returns: 0 on success, -1 on failure
964 * The supplicant uses this callback to let the driver know that keying
965 * material for FT is available and that the driver can use the
966 * provided IEs in the next message in FT authentication sequence.
968 * This function is only needed for driver that support IEEE 802.11r
969 * (Fast BSS Transition).
971 int (*update_ft_ies)(void *priv, const u8 *md, const u8 *ies,
975 * send_ft_action - Send FT Action frame (IEEE 802.11r)
976 * @priv: Private driver interface data
977 * @action: Action field value
978 * @target_ap: Target AP address
979 * @ies: FT IEs (MDIE, FTIE, ...) (FT Request action frame body)
980 * @ies_len: Length of FT IEs in bytes
981 * Returns: 0 on success, -1 on failure
983 * The supplicant uses this callback to request the driver to transmit
984 * an FT Action frame (action category 6) for over-the-DS fast BSS
987 int (*send_ft_action)(void *priv, u8 action, const u8 *target_ap,
988 const u8 *ies, size_t ies_len);
991 * get_scan_results2 - Fetch the latest scan results
992 * @priv: private driver interface data
994 * Returns: Allocated buffer of scan results (caller is responsible for
995 * freeing the data structure) on success, NULL on failure
997 struct wpa_scan_results * (*get_scan_results2)(void *priv);
1000 * set_probe_req_ie - Set information element(s) for Probe Request
1001 * @priv: private driver interface data
1002 * @ies: Information elements to append or %NULL to remove extra IEs
1003 * @ies_len: Length of the IE buffer in octets
1004 * Returns: 0 on success, -1 on failure
1006 int (*set_probe_req_ie)(void *priv, const u8 *ies, size_t ies_len);
1009 * set_mode - Request driver to set the operating mode
1010 * @priv: private driver interface data
1011 * @mode: Operation mode (infra/ibss) IEEE80211_MODE_*
1013 * This handler will be called before any key configuration and call to
1014 * associate() handler in order to allow the operation mode to be
1015 * configured as early as possible. This information is also available
1016 * in associate() params and as such, driver wrappers may not need
1017 * to implement set_mode() handler.
1019 * This function is deprecated. New driver wrapper implementations
1020 * should use associate() parameter mode instead.
1022 * Returns: 0 on success, -1 on failure
1024 int (*set_mode)(void *priv, int mode);
1027 * set_country - Set country
1028 * @priv: Private driver interface data
1029 * @alpha2: country to which to switch to
1030 * Returns: 0 on success, -1 on failure
1032 * This function is for drivers which support some form
1033 * of setting a regulatory domain.
1035 int (*set_country)(void *priv, const char *alpha2);
1038 * global_init - Global driver initialization
1039 * Returns: Pointer to private data (global), %NULL on failure
1041 * This optional function is called to initialize the driver wrapper
1042 * for global data, i.e., data that applies to all interfaces. If this
1043 * function is implemented, global_deinit() will also need to be
1044 * implemented to free the private data. The driver will also likely
1045 * use init2() function instead of init() to get the pointer to global
1046 * data available to per-interface initializer.
1048 void * (*global_init)(void);
1051 * global_deinit - Global driver deinitialization
1052 * @priv: private driver global data from global_init()
1054 * Terminate any global driver related functionality and free the
1055 * global data structure.
1057 void (*global_deinit)(void *priv);
1060 * init2 - Initialize driver interface (with global data)
1061 * @ctx: context to be used when calling wpa_supplicant functions,
1062 * e.g., wpa_supplicant_event()
1063 * @ifname: interface name, e.g., wlan0
1064 * @global_priv: private driver global data from global_init()
1065 * Returns: Pointer to private data, %NULL on failure
1067 * This function can be used instead of init() if the driver wrapper
1070 void * (*init2)(void *ctx, const char *ifname, void *global_priv);
1073 * get_interfaces - Get information about available interfaces
1074 * @global_priv: private driver global data from global_init()
1075 * Returns: Allocated buffer of interface information (caller is
1076 * responsible for freeing the data structure) on success, NULL on
1079 struct wpa_interface_info * (*get_interfaces)(void *global_priv);
1082 * scan2 - Request the driver to initiate scan
1083 * @priv: private driver interface data
1084 * @params: Scan parameters
1086 * Returns: 0 on success, -1 on failure
1088 * Once the scan results are ready, the driver should report scan
1089 * results event for wpa_supplicant which will eventually request the
1090 * results with wpa_driver_get_scan_results2().
1092 int (*scan2)(void *priv, struct wpa_driver_scan_params *params);
1095 * authenticate - Request driver to authenticate
1096 * @priv: private driver interface data
1097 * @params: authentication parameters
1098 * Returns: 0 on success, -1 on failure
1100 * This is an optional function that can be used with drivers that
1101 * support separate authentication and association steps, i.e., when
1102 * wpa_supplicant can act as the SME. If not implemented, associate()
1103 * function is expected to take care of IEEE 802.11 authentication,
1106 int (*authenticate)(void *priv,
1107 struct wpa_driver_auth_params *params);
1109 int (*set_beacon)(void *priv, const u8 *head, size_t head_len,
1110 const u8 *tail, size_t tail_len, int dtim_period);
1112 int (*set_beacon_int)(void *priv, int value);
1116 * enum wpa_event_type - Event type for wpa_supplicant_event() calls
1118 typedef enum wpa_event_type {
1120 * EVENT_ASSOC - Association completed
1122 * This event needs to be delivered when the driver completes IEEE
1123 * 802.11 association or reassociation successfully.
1124 * wpa_driver_ops::get_bssid() is expected to provide the current BSSID
1125 * after this event has been generated. In addition, optional
1126 * EVENT_ASSOCINFO may be generated just before EVENT_ASSOC to provide
1127 * more information about the association. If the driver interface gets
1128 * both of these events at the same time, it can also include the
1129 * assoc_info data in EVENT_ASSOC call.
1134 * EVENT_DISASSOC - Association lost
1136 * This event should be called when association is lost either due to
1137 * receiving deauthenticate or disassociate frame from the AP or when
1138 * sending either of these frames to the current AP. If the driver
1139 * supports separate deauthentication event, EVENT_DISASSOC should only
1140 * be used for disassociation and EVENT_DEAUTH for deauthentication.
1145 * EVENT_MICHAEL_MIC_FAILURE - Michael MIC (TKIP) detected
1147 * This event must be delivered when a Michael MIC error is detected by
1148 * the local driver. Additional data for event processing is
1149 * provided with union wpa_event_data::michael_mic_failure. This
1150 * information is used to request new encyption key and to initiate
1151 * TKIP countermeasures if needed.
1153 EVENT_MICHAEL_MIC_FAILURE,
1156 * EVENT_SCAN_RESULTS - Scan results available
1158 * This event must be called whenever scan results are available to be
1159 * fetched with struct wpa_driver_ops::get_scan_results(). This event
1160 * is expected to be used some time after struct wpa_driver_ops::scan()
1161 * is called. If the driver provides an unsolicited event when the scan
1162 * has been completed, this event can be used to trigger
1163 * EVENT_SCAN_RESULTS call. If such event is not available from the
1164 * driver, the driver wrapper code is expected to use a registered
1165 * timeout to generate EVENT_SCAN_RESULTS call after the time that the
1166 * scan is expected to be completed.
1171 * EVENT_ASSOCINFO - Report optional extra information for association
1173 * This event can be used to report extra association information for
1174 * EVENT_ASSOC processing. This extra information includes IEs from
1175 * association frames and Beacon/Probe Response frames in union
1176 * wpa_event_data::assoc_info. EVENT_ASSOCINFO must be send just before
1177 * EVENT_ASSOC. Alternatively, the driver interface can include
1178 * assoc_info data in the EVENT_ASSOC call if it has all the
1179 * information available at the same point.
1184 * EVENT_INTERFACE_STATUS - Report interface status changes
1186 * This optional event can be used to report changes in interface
1187 * status (interface added/removed) using union
1188 * wpa_event_data::interface_status. This can be used to trigger
1189 * wpa_supplicant to stop and re-start processing for the interface,
1190 * e.g., when a cardbus card is ejected/inserted.
1192 EVENT_INTERFACE_STATUS,
1195 * EVENT_PMKID_CANDIDATE - Report a candidate AP for pre-authentication
1197 * This event can be used to inform wpa_supplicant about candidates for
1198 * RSN (WPA2) pre-authentication. If wpa_supplicant is not responsible
1199 * for scan request (ap_scan=2 mode), this event is required for
1200 * pre-authentication. If wpa_supplicant is performing scan request
1201 * (ap_scan=1), this event is optional since scan results can be used
1202 * to add pre-authentication candidates. union
1203 * wpa_event_data::pmkid_candidate is used to report the BSSID of the
1204 * candidate and priority of the candidate, e.g., based on the signal
1205 * strength, in order to try to pre-authenticate first with candidates
1206 * that are most likely targets for re-association.
1208 * EVENT_PMKID_CANDIDATE can be called whenever the driver has updates
1209 * on the candidate list. In addition, it can be called for the current
1210 * AP and APs that have existing PMKSA cache entries. wpa_supplicant
1211 * will automatically skip pre-authentication in cases where a valid
1212 * PMKSA exists. When more than one candidate exists, this event should
1213 * be generated once for each candidate.
1215 * Driver will be notified about successful pre-authentication with
1216 * struct wpa_driver_ops::add_pmkid() calls.
1218 EVENT_PMKID_CANDIDATE,
1221 * EVENT_STKSTART - Request STK handshake (MLME-STKSTART.request)
1223 * This event can be used to inform wpa_supplicant about desire to set
1224 * up secure direct link connection between two stations as defined in
1225 * IEEE 802.11e with a new PeerKey mechanism that replaced the original
1226 * STAKey negotiation. The caller will need to set peer address for the
1232 * EVENT_FT_RESPONSE - Report FT (IEEE 802.11r) response IEs
1234 * The driver is expected to report the received FT IEs from
1235 * FT authentication sequence from the AP. The FT IEs are included in
1236 * the extra information in union wpa_event_data::ft_ies.
1241 * EVENT_IBSS_RSN_START - Request RSN authentication in IBSS
1243 * The driver can use this event to inform wpa_supplicant about a STA
1244 * in an IBSS with which protected frames could be exchanged. This
1245 * event starts RSN authentication with the other STA to authenticate
1246 * the STA and set up encryption keys with it.
1248 EVENT_IBSS_RSN_START,
1251 * EVENT_AUTH - Authentication result
1253 * This event should be called when authentication attempt has been
1254 * completed. This is only used if the driver supports separate
1255 * authentication step (struct wpa_driver_ops::authenticate).
1256 * Information about authentication result is included in
1257 * union wpa_event_data::auth.
1262 * EVENT_DEAUTH - Authentication lost
1264 * This event should be called when authentication is lost either due
1265 * to receiving deauthenticate frame from the AP or when sending that
1266 * frame to the current AP.
1271 * EVENT_ASSOC_REJECT - Association rejected
1273 * This event should be called when (re)association attempt has been
1274 * rejected by the AP. Information about authentication result is
1275 * included in union wpa_event_data::assoc_reject.
1282 * union wpa_event_data - Additional data for wpa_supplicant_event() calls
1284 union wpa_event_data {
1286 * struct assoc_info - Data for EVENT_ASSOC and EVENT_ASSOCINFO events
1288 * This structure is optional for EVENT_ASSOC calls and required for
1289 * EVENT_ASSOCINFO calls. By using EVENT_ASSOC with this data, the
1290 * driver interface does not need to generate separate EVENT_ASSOCINFO
1295 * req_ies - (Re)Association Request IEs
1297 * If the driver generates WPA/RSN IE, this event data must be
1298 * returned for WPA handshake to have needed information. If
1299 * wpa_supplicant-generated WPA/RSN IE is used, this
1300 * information event is optional.
1302 * This should start with the first IE (fixed fields before IEs
1303 * are not included).
1308 * req_ies_len - Length of req_ies in bytes
1313 * resp_ies - (Re)Association Response IEs
1315 * Optional association data from the driver. This data is not
1316 * required WPA, but may be useful for some protocols and as
1317 * such, should be reported if this is available to the driver
1320 * This should start with the first IE (fixed fields before IEs
1321 * are not included).
1326 * resp_ies_len - Length of resp_ies in bytes
1328 size_t resp_ies_len;
1331 * beacon_ies - Beacon or Probe Response IEs
1333 * Optional Beacon/ProbeResp data: IEs included in Beacon or
1334 * Probe Response frames from the current AP (i.e., the one
1335 * that the client just associated with). This information is
1336 * used to update WPA/RSN IE for the AP. If this field is not
1337 * set, the results from previous scan will be used. If no
1338 * data for the new AP is found, scan results will be requested
1339 * again (without scan request). At this point, the driver is
1340 * expected to provide WPA/RSN IE for the AP (if WPA/WPA2 is
1343 * This should start with the first IE (fixed fields before IEs
1344 * are not included).
1349 * beacon_ies_len - Length of beacon_ies */
1350 size_t beacon_ies_len;
1354 * struct michael_mic_failure - Data for EVENT_MICHAEL_MIC_FAILURE
1356 struct michael_mic_failure {
1358 } michael_mic_failure;
1361 * struct interface_status - Data for EVENT_INTERFACE_STATUS
1363 struct interface_status {
1366 EVENT_INTERFACE_ADDED, EVENT_INTERFACE_REMOVED
1371 * struct pmkid_candidate - Data for EVENT_PMKID_CANDIDATE
1373 struct pmkid_candidate {
1374 /** BSSID of the PMKID candidate */
1376 /** Smaller the index, higher the priority */
1378 /** Whether RSN IE includes pre-authenticate flag */
1383 * struct stkstart - Data for EVENT_STKSTART
1390 * struct ft_ies - FT information elements (EVENT_FT_RESPONSE)
1392 * During FT (IEEE 802.11r) authentication sequence, the driver is
1393 * expected to use this event to report received FT IEs (MDIE, FTIE,
1394 * RSN IE, TIE, possible resource request) to the supplicant. The FT
1395 * IEs for the next message will be delivered through the
1396 * struct wpa_driver_ops::update_ft_ies() callback.
1402 u8 target_ap[ETH_ALEN];
1403 /** Optional IE(s), e.g., WMM TSPEC(s), for RIC-Request */
1405 /** Length of ric_ies buffer in octets */
1410 * struct ibss_rsn_start - Data for EVENT_IBSS_RSN_START
1412 struct ibss_rsn_start {
1417 * struct auth_info - Data for EVENT_AUTH events
1428 * struct assoc_reject - Data for EVENT_ASSOC_REJECT events
1430 struct assoc_reject {
1432 * resp_ies - (Re)Association Response IEs
1434 * Optional association data from the driver. This data is not
1435 * required WPA, but may be useful for some protocols and as
1436 * such, should be reported if this is available to the driver
1439 * This should start with the first IE (fixed fields before IEs
1440 * are not included).
1445 * resp_ies_len - Length of resp_ies in bytes
1447 size_t resp_ies_len;
1450 * status_code - Status Code from (Re)association Response
1457 * wpa_supplicant_event - Report a driver event for wpa_supplicant
1458 * @ctx: Context pointer (wpa_s); this is the ctx variable registered
1459 * with struct wpa_driver_ops::init()
1460 * @event: event type (defined above)
1461 * @data: possible extra data for the event
1463 * Driver wrapper code should call this function whenever an event is received
1466 void wpa_supplicant_event(void *ctx, wpa_event_type event,
1467 union wpa_event_data *data);
1470 * wpa_supplicant_rx_eapol - Deliver a received EAPOL frame to wpa_supplicant
1471 * @ctx: Context pointer (wpa_s); this is the ctx variable registered
1472 * with struct wpa_driver_ops::init()
1473 * @src_addr: Source address of the EAPOL frame
1474 * @buf: EAPOL data starting from the EAPOL header (i.e., no Ethernet header)
1475 * @len: Length of the EAPOL data
1477 * This function is called for each received EAPOL frame. Most driver
1478 * interfaces rely on more generic OS mechanism for receiving frames through
1479 * l2_packet, but if such a mechanism is not available, the driver wrapper may
1480 * take care of received EAPOL frames and deliver them to the core supplicant
1481 * code by calling this function.
1483 void wpa_supplicant_rx_eapol(void *ctx, const u8 *src_addr,
1484 const u8 *buf, size_t len);
1486 void wpa_supplicant_sta_rx(void *ctx, const u8 *buf, size_t len,
1487 struct ieee80211_rx_status *rx_status);
1488 void wpa_supplicant_sta_free_hw_features(struct hostapd_hw_modes *hw_features,
1489 size_t num_hw_features);
1491 const u8 * wpa_scan_get_ie(const struct wpa_scan_res *res, u8 ie);
1492 #define WPA_IE_VENDOR_TYPE 0x0050f201
1493 #define WPS_IE_VENDOR_TYPE 0x0050f204
1494 const u8 * wpa_scan_get_vendor_ie(const struct wpa_scan_res *res,
1496 struct wpabuf * wpa_scan_get_vendor_ie_multi(const struct wpa_scan_res *res,
1498 int wpa_scan_get_max_rate(const struct wpa_scan_res *res);
1499 void wpa_scan_results_free(struct wpa_scan_results *res);
1500 void wpa_scan_sort_results(struct wpa_scan_results *res);
1502 #endif /* DRIVER_H */