2 * WPA Supplicant - driver interface definition
3 * Copyright (c) 2003-2008, 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;
194 * struct wpa_driver_auth_params - Authentication parameters
195 * Data for struct wpa_driver_ops::authenticate().
197 struct wpa_driver_auth_params {
208 * struct wpa_driver_associate_params - Association parameters
209 * Data for struct wpa_driver_ops::associate().
211 struct wpa_driver_associate_params {
213 * bssid - BSSID of the selected AP
214 * This can be %NULL, if ap_scan=2 mode is used and the driver is
215 * responsible for selecting with which BSS to associate. */
219 * ssid - The selected SSID
225 * freq - Frequency of the channel the selected AP is using
226 * Frequency that the selected AP is using (in MHz as
227 * reported in the scan results)
232 * wpa_ie - WPA information element for (Re)Association Request
233 * WPA information element to be included in (Re)Association
234 * Request (including information element id and length). Use
235 * of this WPA IE is optional. If the driver generates the WPA
236 * IE, it can use pairwise_suite, group_suite, and
237 * key_mgmt_suite to select proper algorithms. In this case,
238 * the driver has to notify wpa_supplicant about the used WPA
239 * IE by generating an event that the interface code will
240 * convert into EVENT_ASSOCINFO data (see below).
242 * When using WPA2/IEEE 802.11i, wpa_ie is used for RSN IE
243 * instead. The driver can determine which version is used by
244 * looking at the first byte of the IE (0xdd for WPA, 0x30 for
247 * When using WPS, wpa_ie is used for WPS IE instead of WPA/RSN IE.
251 * wpa_ie_len - length of the wpa_ie
255 /* The selected pairwise/group cipher and key management
256 * suites. These are usually ignored if @wpa_ie is used. */
257 wpa_cipher pairwise_suite;
258 wpa_cipher group_suite;
259 wpa_key_mgmt key_mgmt_suite;
262 * auth_alg - Allowed authentication algorithms
263 * Bit field of AUTH_ALG_*
268 * mode - Operation mode (infra/ibss) IEEE80211_MODE_*
273 * wep_key - WEP keys for static WEP configuration
275 const u8 *wep_key[4];
278 * wep_key_len - WEP key length for static WEP configuration
280 size_t wep_key_len[4];
283 * wep_tx_keyidx - WEP TX key index for static WEP configuration
288 * mgmt_frame_protection - IEEE 802.11w management frame protection
291 NO_MGMT_FRAME_PROTECTION,
292 MGMT_FRAME_PROTECTION_OPTIONAL,
293 MGMT_FRAME_PROTECTION_REQUIRED
294 } mgmt_frame_protection;
297 * ft_ies - IEEE 802.11r / FT information elements
298 * If the supplicant is using IEEE 802.11r (FT) and has the needed keys
299 * for fast transition, this parameter is set to include the IEs that
300 * are to be sent in the next FT Authentication Request message.
301 * update_ft_ies() handler is called to update the IEs for further
302 * FT messages in the sequence.
304 * The driver should use these IEs only if the target AP is advertising
305 * the same mobility domain as the one included in the MDIE here.
307 * In ap_scan=2 mode, the driver can use these IEs when moving to a new
308 * AP after the initial association. These IEs can only be used if the
309 * target AP is advertising support for FT and is using the same MDIE
310 * and SSID as the current AP.
312 * The driver is responsible for reporting the FT IEs received from the
313 * AP's response using wpa_supplicant_event() with EVENT_FT_RESPONSE
314 * type. update_ft_ies() handler will then be called with the FT IEs to
315 * include in the next frame in the authentication sequence.
320 * ft_ies_len - Length of ft_ies in bytes
325 * ft_md - FT Mobility domain (6 octets) (also included inside ft_ies)
327 * This value is provided to allow the driver interface easier access
328 * to the current mobility domain. This value is set to %NULL if no
329 * mobility domain is currently active.
334 * passphrase - RSN passphrase for PSK
336 * This value is made available only for WPA/WPA2-Personal (PSK) and
337 * only for drivers that set WPA_DRIVER_FLAGS_4WAY_HANDSHAKE. This is
338 * the 8..63 character ASCII passphrase, if available. Please note that
339 * this can be %NULL if passphrase was not used to generate the PSK. In
340 * that case, the psk field must be used to fetch the PSK.
342 const char *passphrase;
345 * psk - RSN PSK (alternative for passphrase for PSK)
347 * This value is made available only for WPA/WPA2-Personal (PSK) and
348 * only for drivers that set WPA_DRIVER_FLAGS_4WAY_HANDSHAKE. This is
349 * the 32-octet (256-bit) PSK, if available. The driver wrapper should
350 * be prepared to handle %NULL value as an error.
356 * struct wpa_driver_capa - Driver capability information
358 struct wpa_driver_capa {
359 #define WPA_DRIVER_CAPA_KEY_MGMT_WPA 0x00000001
360 #define WPA_DRIVER_CAPA_KEY_MGMT_WPA2 0x00000002
361 #define WPA_DRIVER_CAPA_KEY_MGMT_WPA_PSK 0x00000004
362 #define WPA_DRIVER_CAPA_KEY_MGMT_WPA2_PSK 0x00000008
363 #define WPA_DRIVER_CAPA_KEY_MGMT_WPA_NONE 0x00000010
364 #define WPA_DRIVER_CAPA_KEY_MGMT_FT 0x00000020
365 #define WPA_DRIVER_CAPA_KEY_MGMT_FT_PSK 0x00000040
366 unsigned int key_mgmt;
368 #define WPA_DRIVER_CAPA_ENC_WEP40 0x00000001
369 #define WPA_DRIVER_CAPA_ENC_WEP104 0x00000002
370 #define WPA_DRIVER_CAPA_ENC_TKIP 0x00000004
371 #define WPA_DRIVER_CAPA_ENC_CCMP 0x00000008
374 #define WPA_DRIVER_AUTH_OPEN 0x00000001
375 #define WPA_DRIVER_AUTH_SHARED 0x00000002
376 #define WPA_DRIVER_AUTH_LEAP 0x00000004
379 /* Driver generated WPA/RSN IE */
380 #define WPA_DRIVER_FLAGS_DRIVER_IE 0x00000001
381 #define WPA_DRIVER_FLAGS_SET_KEYS_AFTER_ASSOC 0x00000002
382 #define WPA_DRIVER_FLAGS_USER_SPACE_MLME 0x00000004
383 /* Driver takes care of RSN 4-way handshake internally; PMK is configured with
384 * struct wpa_driver_ops::set_key using alg = WPA_ALG_PMK */
385 #define WPA_DRIVER_FLAGS_4WAY_HANDSHAKE 0x00000008
386 #define WPA_DRIVER_FLAGS_WIRED 0x00000010
387 /* Driver provides separate commands for authentication and association (SME in
388 * wpa_supplicant). */
389 #define WPA_DRIVER_FLAGS_SME 0x00000020
396 #define WPA_CHAN_W_SCAN 0x00000001
397 #define WPA_CHAN_W_ACTIVE_SCAN 0x00000002
398 #define WPA_CHAN_W_IBSS 0x00000004
400 struct wpa_channel_data {
401 short chan; /* channel number (IEEE 802.11) */
402 short freq; /* frequency in MHz */
403 int flag; /* flag for user space use (WPA_CHAN_*) */
406 #define WPA_RATE_ERP 0x00000001
407 #define WPA_RATE_BASIC 0x00000002
408 #define WPA_RATE_PREAMBLE2 0x00000004
409 #define WPA_RATE_SUPPORTED 0x00000010
410 #define WPA_RATE_OFDM 0x00000020
411 #define WPA_RATE_CCK 0x00000040
412 #define WPA_RATE_MANDATORY 0x00000100
414 struct wpa_rate_data {
415 int rate; /* rate in 100 kbps */
416 int flags; /* WPA_RATE_ flags */
426 struct wpa_hw_modes {
429 struct wpa_channel_data *channels;
431 struct wpa_rate_data *rates;
435 struct ieee80211_rx_status {
442 * struct wpa_driver_ops - Driver interface API definition
444 * This structure defines the API that each driver interface needs to implement
445 * for core wpa_supplicant code. All driver specific functionality is captured
448 struct wpa_driver_ops {
449 /** Name of the driver interface */
451 /** One line description of the driver interface */
455 * get_bssid - Get the current BSSID
456 * @priv: private driver interface data
457 * @bssid: buffer for BSSID (ETH_ALEN = 6 bytes)
459 * Returns: 0 on success, -1 on failure
461 * Query kernel driver for the current BSSID and copy it to bssid.
462 * Setting bssid to 00:00:00:00:00:00 is recommended if the STA is not
465 int (*get_bssid)(void *priv, u8 *bssid);
468 * get_ssid - Get the current SSID
469 * @priv: private driver interface data
470 * @ssid: buffer for SSID (at least 32 bytes)
472 * Returns: Length of the SSID on success, -1 on failure
474 * Query kernel driver for the current SSID and copy it to ssid.
475 * Returning zero is recommended if the STA is not associated.
477 * Note: SSID is an array of octets, i.e., it is not nul terminated and
478 * can, at least in theory, contain control characters (including nul)
479 * and as such, should be processed as binary data, not a printable
482 int (*get_ssid)(void *priv, u8 *ssid);
485 * set_wpa - Enable/disable WPA support (OBSOLETE)
486 * @priv: private driver interface data
487 * @enabled: 1 = enable, 0 = disable
489 * Returns: 0 on success, -1 on failure
491 * Note: This function is included for backwards compatibility. This is
492 * called only just after init and just before deinit, so these
493 * functions can be used to implement same functionality and the driver
494 * interface need not define this function.
496 * Configure the kernel driver to enable/disable WPA support. This may
497 * be empty function, if WPA support is always enabled. Common
498 * configuration items are WPA IE (clearing it when WPA support is
499 * disabled), Privacy flag configuration for capability field (note:
500 * this the value need to set in associate handler to allow plaintext
501 * mode to be used) when trying to associate with, roaming mode (can
502 * allow wpa_supplicant to control roaming if ap_scan=1 is used;
503 * however, drivers can also implement roaming if desired, especially
504 * ap_scan=2 mode is used for this).
506 int (*set_wpa)(void *priv, int enabled);
509 * set_key - Configure encryption key
510 * @priv: private driver interface data
511 * @alg: encryption algorithm (%WPA_ALG_NONE, %WPA_ALG_WEP,
512 * %WPA_ALG_TKIP, %WPA_ALG_CCMP, %WPA_ALG_IGTK, %WPA_ALG_PMK);
513 * %WPA_ALG_NONE clears the key.
514 * @addr: address of the peer STA or ff:ff:ff:ff:ff:ff for
515 * broadcast/default keys
516 * @key_idx: key index (0..3), usually 0 for unicast keys; 0..4095 for
518 * @set_tx: configure this key as the default Tx key (only used when
519 * driver does not support separate unicast/individual key
520 * @seq: sequence number/packet number, seq_len octets, the next
521 * packet number to be used for in replay protection; configured
522 * for Rx keys (in most cases, this is only used with broadcast
523 * keys and set to zero for unicast keys)
524 * @seq_len: length of the seq, depends on the algorithm:
525 * TKIP: 6 octets, CCMP: 6 octets, IGTK: 6 octets
526 * @key: key buffer; TKIP: 16-byte temporal key, 8-byte Tx Mic key,
528 * @key_len: length of the key buffer in octets (WEP: 5 or 13,
529 * TKIP: 32, CCMP: 16, IGTK: 16)
531 * Returns: 0 on success, -1 on failure
533 * Configure the given key for the kernel driver. If the driver
534 * supports separate individual keys (4 default keys + 1 individual),
535 * addr can be used to determine whether the key is default or
536 * individual. If only 4 keys are supported, the default key with key
537 * index 0 is used as the individual key. STA must be configured to use
538 * it as the default Tx key (set_tx is set) and accept Rx for all the
539 * key indexes. In most cases, WPA uses only key indexes 1 and 2 for
540 * broadcast keys, so key index 0 is available for this kind of
543 * Please note that TKIP keys include separate TX and RX MIC keys and
544 * some drivers may expect them in different order than wpa_supplicant
545 * is using. If the TX/RX keys are swapped, all TKIP encrypted packets
546 * will tricker Michael MIC errors. This can be fixed by changing the
547 * order of MIC keys by swapping te bytes 16..23 and 24..31 of the key
548 * in driver_*.c set_key() implementation, see driver_ndis.c for an
549 * example on how this can be done.
551 int (*set_key)(void *priv, wpa_alg alg, const u8 *addr,
552 int key_idx, int set_tx, const u8 *seq, size_t seq_len,
553 const u8 *key, size_t key_len);
556 * init - Initialize driver interface
557 * @ctx: context to be used when calling wpa_supplicant functions,
558 * e.g., wpa_supplicant_event()
559 * @ifname: interface name, e.g., wlan0
561 * Returns: Pointer to private data, %NULL on failure
563 * Initialize driver interface, including event processing for kernel
564 * driver events (e.g., associated, scan results, Michael MIC failure).
565 * This function can allocate a private configuration data area for
566 * @ctx, file descriptor, interface name, etc. information that may be
567 * needed in future driver operations. If this is not used, non-NULL
568 * value will need to be returned because %NULL is used to indicate
569 * failure. The returned value will be used as 'void *priv' data for
570 * all other driver_ops functions.
572 * The main event loop (eloop.c) of wpa_supplicant can be used to
573 * register callback for read sockets (eloop_register_read_sock()).
575 * See below for more information about events and
576 * wpa_supplicant_event() function.
578 void * (*init)(void *ctx, const char *ifname);
581 * deinit - Deinitialize driver interface
582 * @priv: private driver interface data from init()
584 * Shut down driver interface and processing of driver events. Free
585 * private data buffer if one was allocated in init() handler.
587 void (*deinit)(void *priv);
590 * set_param - Set driver configuration parameters
591 * @priv: private driver interface data from init()
592 * @param: driver specific configuration parameters
594 * Returns: 0 on success, -1 on failure
596 * Optional handler for notifying driver interface about configuration
597 * parameters (driver_param).
599 int (*set_param)(void *priv, const char *param);
602 * set_countermeasures - Enable/disable TKIP countermeasures
603 * @priv: private driver interface data
604 * @enabled: 1 = countermeasures enabled, 0 = disabled
606 * Returns: 0 on success, -1 on failure
608 * Configure TKIP countermeasures. When these are enabled, the driver
609 * should drop all received and queued frames that are using TKIP.
611 int (*set_countermeasures)(void *priv, int enabled);
614 * set_drop_unencrypted - Enable/disable unencrypted frame filtering
615 * @priv: private driver interface data
616 * @enabled: 1 = unencrypted Tx/Rx frames will be dropped, 0 = disabled
618 * Returns: 0 on success, -1 on failure
620 * Configure the driver to drop all non-EAPOL frames (both receive and
621 * transmit paths). Unencrypted EAPOL frames (ethertype 0x888e) must
622 * still be allowed for key negotiation.
624 int (*set_drop_unencrypted)(void *priv, int enabled);
627 * scan - Request the driver to initiate scan (old version)
628 * @priv: private driver interface data
629 * @ssid: specific SSID to scan for (ProbeReq) or %NULL to scan for
630 * all SSIDs (either active scan with wildcard SSID or passive
632 * @ssid_len: length of the SSID
634 * Returns: 0 on success, -1 on failure
636 * Once the scan results are ready, the driver should report scan
637 * results event for wpa_supplicant which will eventually request the
638 * results with wpa_driver_get_scan_results().
640 * This function is depracated. New driver wrapper implementations
641 * should implement support for scan2().
643 int (*scan)(void *priv, const u8 *ssid, size_t ssid_len);
646 * get_scan_results - Fetch the latest scan results (old version)
647 * @priv: private driver interface data
648 * @results: pointer to buffer for scan results
649 * @max_size: maximum number of entries (buffer size)
651 * Returns: Number of scan result entries used on success, -1 on
654 * If scan results include more than max_size BSSes, max_size will be
655 * returned and the remaining entries will not be included in the
658 * This function is depracated. New driver wrapper implementations
659 * should implement support for get_scan_results2().
661 int (*get_scan_results)(void *priv,
662 struct wpa_scan_result *results,
666 * deauthenticate - Request driver to deauthenticate
667 * @priv: private driver interface data
668 * @addr: peer address (BSSID of the AP)
669 * @reason_code: 16-bit reason code to be sent in the deauthentication
672 * Returns: 0 on success, -1 on failure
674 int (*deauthenticate)(void *priv, const u8 *addr, int reason_code);
677 * disassociate - Request driver to disassociate
678 * @priv: private driver interface data
679 * @addr: peer address (BSSID of the AP)
680 * @reason_code: 16-bit reason code to be sent in the disassociation
683 * Returns: 0 on success, -1 on failure
685 int (*disassociate)(void *priv, const u8 *addr, int reason_code);
688 * associate - Request driver to associate
689 * @priv: private driver interface data
690 * @params: association parameters
692 * Returns: 0 on success, -1 on failure
694 int (*associate)(void *priv,
695 struct wpa_driver_associate_params *params);
698 * set_auth_alg - Set IEEE 802.11 authentication algorithm
699 * @priv: private driver interface data
700 * @auth_alg: bit field of AUTH_ALG_*
702 * If the driver supports more than one authentication algorithm at the
703 * same time, it should configure all supported algorithms. If not, one
704 * algorithm needs to be selected arbitrarily. Open System
705 * authentication should be ok for most cases and it is recommended to
706 * be used if other options are not supported. Static WEP configuration
707 * may also use Shared Key authentication and LEAP requires its own
708 * algorithm number. For LEAP, user can make sure that only one
709 * algorithm is used at a time by configuring LEAP as the only
710 * supported EAP method. This information is also available in
711 * associate() params, so set_auth_alg may not be needed in case of
714 * Returns: 0 on success, -1 on failure
716 int (*set_auth_alg)(void *priv, int auth_alg);
719 * add_pmkid - Add PMKSA cache entry to the driver
720 * @priv: private driver interface data
721 * @bssid: BSSID for the PMKSA cache entry
722 * @pmkid: PMKID for the PMKSA cache entry
724 * Returns: 0 on success, -1 on failure
726 * This function is called when a new PMK is received, as a result of
727 * either normal authentication or RSN pre-authentication.
729 * If the driver generates RSN IE, i.e., it does not use wpa_ie in
730 * associate(), add_pmkid() can be used to add new PMKSA cache entries
731 * in the driver. If the driver uses wpa_ie from wpa_supplicant, this
732 * driver_ops function does not need to be implemented. Likewise, if
733 * the driver does not support WPA, this function is not needed.
735 int (*add_pmkid)(void *priv, const u8 *bssid, const u8 *pmkid);
738 * remove_pmkid - Remove PMKSA cache entry to the driver
739 * @priv: private driver interface data
740 * @bssid: BSSID for the PMKSA cache entry
741 * @pmkid: PMKID for the PMKSA cache entry
743 * Returns: 0 on success, -1 on failure
745 * This function is called when the supplicant drops a PMKSA cache
746 * entry for any reason.
748 * If the driver generates RSN IE, i.e., it does not use wpa_ie in
749 * associate(), remove_pmkid() can be used to synchronize PMKSA caches
750 * between the driver and wpa_supplicant. If the driver uses wpa_ie
751 * from wpa_supplicant, this driver_ops function does not need to be
752 * implemented. Likewise, if the driver does not support WPA, this
753 * function is not needed.
755 int (*remove_pmkid)(void *priv, const u8 *bssid, const u8 *pmkid);
758 * flush_pmkid - Flush PMKSA cache
759 * @priv: private driver interface data
761 * Returns: 0 on success, -1 on failure
763 * This function is called when the supplicant drops all PMKSA cache
764 * entries for any reason.
766 * If the driver generates RSN IE, i.e., it does not use wpa_ie in
767 * associate(), remove_pmkid() can be used to synchronize PMKSA caches
768 * between the driver and wpa_supplicant. If the driver uses wpa_ie
769 * from wpa_supplicant, this driver_ops function does not need to be
770 * implemented. Likewise, if the driver does not support WPA, this
771 * function is not needed.
773 int (*flush_pmkid)(void *priv);
776 * flush_pmkid - Flush PMKSA cache
777 * @priv: private driver interface data
779 * Returns: 0 on success, -1 on failure
781 * Get driver/firmware/hardware capabilities.
783 int (*get_capa)(void *priv, struct wpa_driver_capa *capa);
786 * poll - Poll driver for association information
787 * @priv: private driver interface data
789 * This is an option callback that can be used when the driver does not
790 * provide event mechanism for association events. This is called when
791 * receiving WPA EAPOL-Key messages that require association
792 * information. The driver interface is supposed to generate associnfo
793 * event before returning from this callback function. In addition, the
794 * driver interface should generate an association event after having
795 * sent out associnfo.
797 void (*poll)(void *priv);
800 * get_ifname - Get interface name
801 * @priv: private driver interface data
803 * Returns: Pointer to the interface name. This can differ from the
804 * interface name used in init() call. Init() is called first.
806 * This optional function can be used to allow the driver interface to
807 * replace the interface name with something else, e.g., based on an
808 * interface mapping from a more descriptive name.
810 const char * (*get_ifname)(void *priv);
813 * get_mac_addr - Get own MAC address
814 * @priv: private driver interface data
816 * Returns: Pointer to own MAC address or %NULL on failure
818 * This optional function can be used to get the own MAC address of the
819 * device from the driver interface code. This is only needed if the
820 * l2_packet implementation for the OS does not provide easy access to
822 const u8 * (*get_mac_addr)(void *priv);
825 * send_eapol - Optional function for sending EAPOL packets
826 * @priv: private driver interface data
827 * @dest: Destination MAC address
829 * @data: EAPOL packet starting with IEEE 802.1X header
830 * @data_len: Size of the EAPOL packet
832 * Returns: 0 on success, -1 on failure
834 * This optional function can be used to override l2_packet operations
835 * with driver specific functionality. If this function pointer is set,
836 * l2_packet module is not used at all and the driver interface code is
837 * responsible for receiving and sending all EAPOL packets. The
838 * received EAPOL packets are sent to core code by calling
839 * wpa_supplicant_rx_eapol(). The driver interface is required to
840 * implement get_mac_addr() handler if send_eapol() is used.
842 int (*send_eapol)(void *priv, const u8 *dest, u16 proto,
843 const u8 *data, size_t data_len);
846 * set_operstate - Sets device operating state to DORMANT or UP
847 * @priv: private driver interface data
848 * @state: 0 = dormant, 1 = up
849 * Returns: 0 on success, -1 on failure
851 * This is an optional function that can be used on operating systems
852 * that support a concept of controlling network device state from user
853 * space applications. This function, if set, gets called with
854 * state = 1 when authentication has been completed and with state = 0
855 * when connection is lost.
857 int (*set_operstate)(void *priv, int state);
860 * mlme_setprotection - MLME-SETPROTECTION.request primitive
861 * @priv: Private driver interface data
862 * @addr: Address of the station for which to set protection (may be
863 * %NULL for group keys)
864 * @protect_type: MLME_SETPROTECTION_PROTECT_TYPE_*
865 * @key_type: MLME_SETPROTECTION_KEY_TYPE_*
866 * Returns: 0 on success, -1 on failure
868 * This is an optional function that can be used to set the driver to
869 * require protection for Tx and/or Rx frames. This uses the layer
870 * interface defined in IEEE 802.11i-2004 clause 10.3.22.1
871 * (MLME-SETPROTECTION.request). Many drivers do not use explicit
872 * set protection operation; instead, they set protection implicitly
873 * based on configured keys.
875 int (*mlme_setprotection)(void *priv, const u8 *addr, int protect_type,
879 * get_hw_feature_data - Get hardware support data (channels and rates)
880 * @priv: Private driver interface data
881 * @num_modes: Variable for returning the number of returned modes
882 * flags: Variable for returning hardware feature flags
883 * Returns: Pointer to allocated hardware data on success or %NULL on
884 * failure. Caller is responsible for freeing this.
886 * This function is only needed for drivers that export MLME
887 * (management frame processing) to wpa_supplicant.
889 struct wpa_hw_modes * (*get_hw_feature_data)(void *priv,
894 * set_channel - Set channel
895 * @priv: Private driver interface data
896 * @phymode: WPA_MODE_IEEE80211B, ..
897 * @chan: IEEE 802.11 channel number
898 * @freq: Frequency of the channel in MHz
899 * Returns: 0 on success, -1 on failure
901 * This function is only needed for drivers that export MLME
902 * (management frame processing) to wpa_supplicant.
904 int (*set_channel)(void *priv, wpa_hw_mode phymode, int chan,
908 * set_ssid - Set SSID
909 * @priv: Private driver interface data
911 * @ssid_len: SSID length
912 * Returns: 0 on success, -1 on failure
914 * This function is only needed for drivers that export MLME
915 * (management frame processing) to wpa_supplicant.
917 int (*set_ssid)(void *priv, const u8 *ssid, size_t ssid_len);
920 * set_bssid - Set BSSID
921 * @priv: Private driver interface data
923 * Returns: 0 on success, -1 on failure
925 * This function is only needed for drivers that export MLME
926 * (management frame processing) to wpa_supplicant.
928 int (*set_bssid)(void *priv, const u8 *bssid);
931 * send_mlme - Send management frame from MLME
932 * @priv: Private driver interface data
933 * @data: IEEE 802.11 management frame with IEEE 802.11 header
934 * @data_len: Size of the management frame
935 * Returns: 0 on success, -1 on failure
937 * This function is only needed for drivers that export MLME
938 * (management frame processing) to wpa_supplicant.
940 int (*send_mlme)(void *priv, const u8 *data, size_t data_len);
943 * mlme_add_sta - Add a STA entry into the driver/netstack
944 * @priv: Private driver interface data
945 * @addr: MAC address of the STA (e.g., BSSID of the AP)
946 * @supp_rates: Supported rate set (from (Re)AssocResp); in IEEE 802.11
947 * format (one octet per rate, 1 = 0.5 Mbps)
948 * @supp_rates_len: Number of entries in supp_rates
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. When the MLME code
953 * completes association with an AP, this function is called to
954 * configure the driver/netstack with a STA entry for data frame
955 * processing (TX rate control, encryption/decryption).
957 int (*mlme_add_sta)(void *priv, const u8 *addr, const u8 *supp_rates,
958 size_t supp_rates_len);
961 * mlme_remove_sta - Remove a STA entry from the driver/netstack
962 * @priv: Private driver interface data
963 * @addr: MAC address of the STA (e.g., BSSID of the AP)
964 * Returns: 0 on success, -1 on failure
966 * This function is only needed for drivers that export MLME
967 * (management frame processing) to wpa_supplicant.
969 int (*mlme_remove_sta)(void *priv, const u8 *addr);
972 * update_ft_ies - Update FT (IEEE 802.11r) IEs
973 * @priv: Private driver interface data
974 * @md: Mobility domain (2 octets) (also included inside ies)
975 * @ies: FT IEs (MDIE, FTIE, ...) or %NULL to remove IEs
976 * @ies_len: Length of FT IEs in bytes
977 * Returns: 0 on success, -1 on failure
979 * The supplicant uses this callback to let the driver know that keying
980 * material for FT is available and that the driver can use the
981 * provided IEs in the next message in FT authentication sequence.
983 * This function is only needed for driver that support IEEE 802.11r
984 * (Fast BSS Transition).
986 int (*update_ft_ies)(void *priv, const u8 *md, const u8 *ies,
990 * send_ft_action - Send FT Action frame (IEEE 802.11r)
991 * @priv: Private driver interface data
992 * @action: Action field value
993 * @target_ap: Target AP address
994 * @ies: FT IEs (MDIE, FTIE, ...) (FT Request action frame body)
995 * @ies_len: Length of FT IEs in bytes
996 * Returns: 0 on success, -1 on failure
998 * The supplicant uses this callback to request the driver to transmit
999 * an FT Action frame (action category 6) for over-the-DS fast BSS
1002 int (*send_ft_action)(void *priv, u8 action, const u8 *target_ap,
1003 const u8 *ies, size_t ies_len);
1006 * get_scan_results2 - Fetch the latest scan results
1007 * @priv: private driver interface data
1009 * Returns: Allocated buffer of scan results (caller is responsible for
1010 * freeing the data structure) on success, NULL on failure
1012 struct wpa_scan_results * (*get_scan_results2)(void *priv);
1015 * set_probe_req_ie - Set information element(s) for Probe Request
1016 * @priv: private driver interface data
1017 * @ies: Information elements to append or %NULL to remove extra IEs
1018 * @ies_len: Length of the IE buffer in octets
1019 * Returns: 0 on success, -1 on failure
1021 int (*set_probe_req_ie)(void *priv, const u8 *ies, size_t ies_len);
1024 * set_mode - Request driver to set the operating mode
1025 * @priv: private driver interface data
1026 * @mode: Operation mode (infra/ibss) IEEE80211_MODE_*
1028 * This handler will be called before any key configuration and call to
1029 * associate() handler in order to allow the operation mode to be
1030 * configured as early as possible. This information is also available
1031 * in associate() params and as such, some driver wrappers may not need
1032 * to implement set_mode() handler.
1033 * Returns: 0 on success, -1 on failure
1035 int (*set_mode)(void *priv, int mode);
1038 * set_country - Set country
1039 * @priv: Private driver interface data
1040 * @alpha2: country to which to switch to
1041 * Returns: 0 on success, -1 on failure
1043 * This function is for drivers which support some form
1044 * of setting a regulatory domain.
1046 int (*set_country)(void *priv, const char *alpha2);
1049 * global_init - Global driver initialization
1050 * Returns: Pointer to private data (global), %NULL on failure
1052 * This optional function is called to initialize the driver wrapper
1053 * for global data, i.e., data that applies to all interfaces. If this
1054 * function is implemented, global_deinit() will also need to be
1055 * implemented to free the private data. The driver will also likely
1056 * use init2() function instead of init() to get the pointer to global
1057 * data available to per-interface initializer.
1059 void * (*global_init)(void);
1062 * global_deinit - Global driver deinitialization
1063 * @priv: private driver global data from global_init()
1065 * Terminate any global driver related functionality and free the
1066 * global data structure.
1068 void (*global_deinit)(void *priv);
1071 * init2 - Initialize driver interface (with global data)
1072 * @ctx: context to be used when calling wpa_supplicant functions,
1073 * e.g., wpa_supplicant_event()
1074 * @ifname: interface name, e.g., wlan0
1075 * @global_priv: private driver global data from global_init()
1076 * Returns: Pointer to private data, %NULL on failure
1078 * This function can be used instead of init() if the driver wrapper
1081 void * (*init2)(void *ctx, const char *ifname, void *global_priv);
1084 * get_interfaces - Get information about available interfaces
1085 * @global_priv: private driver global data from global_init()
1086 * Returns: Allocated buffer of interface information (caller is
1087 * responsible for freeing the data structure) on success, NULL on
1090 struct wpa_interface_info * (*get_interfaces)(void *global_priv);
1093 * scan2 - Request the driver to initiate scan
1094 * @priv: private driver interface data
1095 * @params: Scan parameters
1097 * Returns: 0 on success, -1 on failure
1099 * Once the scan results are ready, the driver should report scan
1100 * results event for wpa_supplicant which will eventually request the
1101 * results with wpa_driver_get_scan_results2().
1103 int (*scan2)(void *priv, struct wpa_driver_scan_params *params);
1106 * authenticate - Request driver to authenticate
1107 * @priv: private driver interface data
1108 * @params: authentication parameters
1109 * Returns: 0 on success, -1 on failure
1111 * This is an optional function that can be used with drivers that
1112 * support separate authentication and association steps, i.e., when
1113 * wpa_supplicant can act as the SME. If not implemented, associate()
1114 * function is expected to take care of IEEE 802.11 authentication,
1117 int (*authenticate)(void *priv,
1118 struct wpa_driver_auth_params *params);
1122 * enum wpa_event_type - Event type for wpa_supplicant_event() calls
1124 typedef enum wpa_event_type {
1126 * EVENT_ASSOC - Association completed
1128 * This event needs to be delivered when the driver completes IEEE
1129 * 802.11 association or reassociation successfully.
1130 * wpa_driver_ops::get_bssid() is expected to provide the current BSSID
1131 * after this event has been generated. In addition, optional
1132 * EVENT_ASSOCINFO may be generated just before EVENT_ASSOC to provide
1133 * more information about the association. If the driver interface gets
1134 * both of these events at the same time, it can also include the
1135 * assoc_info data in EVENT_ASSOC call.
1140 * EVENT_DISASSOC - Association lost
1142 * This event should be called when association is lost either due to
1143 * receiving deauthenticate or disassociate frame from the AP or when
1144 * sending either of these frames to the current AP. If the driver
1145 * supports separate deauthentication event, EVENT_DISASSOC should only
1146 * be used for disassociation and EVENT_DEAUTH for deauthentication.
1151 * EVENT_MICHAEL_MIC_FAILURE - Michael MIC (TKIP) detected
1153 * This event must be delivered when a Michael MIC error is detected by
1154 * the local driver. Additional data for event processing is
1155 * provided with union wpa_event_data::michael_mic_failure. This
1156 * information is used to request new encyption key and to initiate
1157 * TKIP countermeasures if needed.
1159 EVENT_MICHAEL_MIC_FAILURE,
1162 * EVENT_SCAN_RESULTS - Scan results available
1164 * This event must be called whenever scan results are available to be
1165 * fetched with struct wpa_driver_ops::get_scan_results(). This event
1166 * is expected to be used some time after struct wpa_driver_ops::scan()
1167 * is called. If the driver provides an unsolicited event when the scan
1168 * has been completed, this event can be used to trigger
1169 * EVENT_SCAN_RESULTS call. If such event is not available from the
1170 * driver, the driver wrapper code is expected to use a registered
1171 * timeout to generate EVENT_SCAN_RESULTS call after the time that the
1172 * scan is expected to be completed.
1177 * EVENT_ASSOCINFO - Report optional extra information for association
1179 * This event can be used to report extra association information for
1180 * EVENT_ASSOC processing. This extra information includes IEs from
1181 * association frames and Beacon/Probe Response frames in union
1182 * wpa_event_data::assoc_info. EVENT_ASSOCINFO must be send just before
1183 * EVENT_ASSOC. Alternatively, the driver interface can include
1184 * assoc_info data in the EVENT_ASSOC call if it has all the
1185 * information available at the same point.
1190 * EVENT_INTERFACE_STATUS - Report interface status changes
1192 * This optional event can be used to report changes in interface
1193 * status (interface added/removed) using union
1194 * wpa_event_data::interface_status. This can be used to trigger
1195 * wpa_supplicant to stop and re-start processing for the interface,
1196 * e.g., when a cardbus card is ejected/inserted.
1198 EVENT_INTERFACE_STATUS,
1201 * EVENT_PMKID_CANDIDATE - Report a candidate AP for pre-authentication
1203 * This event can be used to inform wpa_supplicant about candidates for
1204 * RSN (WPA2) pre-authentication. If wpa_supplicant is not responsible
1205 * for scan request (ap_scan=2 mode), this event is required for
1206 * pre-authentication. If wpa_supplicant is performing scan request
1207 * (ap_scan=1), this event is optional since scan results can be used
1208 * to add pre-authentication candidates. union
1209 * wpa_event_data::pmkid_candidate is used to report the BSSID of the
1210 * candidate and priority of the candidate, e.g., based on the signal
1211 * strength, in order to try to pre-authenticate first with candidates
1212 * that are most likely targets for re-association.
1214 * EVENT_PMKID_CANDIDATE can be called whenever the driver has updates
1215 * on the candidate list. In addition, it can be called for the current
1216 * AP and APs that have existing PMKSA cache entries. wpa_supplicant
1217 * will automatically skip pre-authentication in cases where a valid
1218 * PMKSA exists. When more than one candidate exists, this event should
1219 * be generated once for each candidate.
1221 * Driver will be notified about successful pre-authentication with
1222 * struct wpa_driver_ops::add_pmkid() calls.
1224 EVENT_PMKID_CANDIDATE,
1227 * EVENT_STKSTART - Request STK handshake (MLME-STKSTART.request)
1229 * This event can be used to inform wpa_supplicant about desire to set
1230 * up secure direct link connection between two stations as defined in
1231 * IEEE 802.11e with a new PeerKey mechanism that replaced the original
1232 * STAKey negotiation. The caller will need to set peer address for the
1238 * EVENT_FT_RESPONSE - Report FT (IEEE 802.11r) response IEs
1240 * The driver is expected to report the received FT IEs from
1241 * FT authentication sequence from the AP. The FT IEs are included in
1242 * the extra information in union wpa_event_data::ft_ies.
1247 * EVENT_IBSS_RSN_START - Request RSN authentication in IBSS
1249 * The driver can use this event to inform wpa_supplicant about a STA
1250 * in an IBSS with which protected frames could be exchanged. This
1251 * event starts RSN authentication with the other STA to authenticate
1252 * the STA and set up encryption keys with it.
1254 EVENT_IBSS_RSN_START,
1257 * EVENT_AUTH - Authentication result
1259 * This event should be called when authentication attempt has been
1260 * completed. This is only used if the driver supports separate
1261 * authentication step (struct wpa_driver_ops::authenticate).
1262 * Information about authentication result is included in
1263 * union wpa_event_data::auth.
1268 * EVENT_DEAUTH - Authentication lost
1270 * This event should be called when authentication is lost either due
1271 * to receiving deauthenticate frame from the AP or when sending that
1272 * frame to the current AP.
1279 * union wpa_event_data - Additional data for wpa_supplicant_event() calls
1281 union wpa_event_data {
1283 * struct assoc_info - Data for EVENT_ASSOC and EVENT_ASSOCINFO events
1285 * This structure is optional for EVENT_ASSOC calls and required for
1286 * EVENT_ASSOCINFO calls. By using EVENT_ASSOC with this data, the
1287 * driver interface does not need to generate separate EVENT_ASSOCINFO
1292 * req_ies - (Re)Association Request IEs
1294 * If the driver generates WPA/RSN IE, this event data must be
1295 * returned for WPA handshake to have needed information. If
1296 * wpa_supplicant-generated WPA/RSN IE is used, this
1297 * information event is optional.
1299 * This should start with the first IE (fixed fields before IEs
1300 * are not included).
1305 * req_ies_len - Length of req_ies in bytes
1310 * resp_ies - (Re)Association Response IEs
1312 * Optional association data from the driver. This data is not
1313 * required WPA, but may be useful for some protocols and as
1314 * such, should be reported if this is available to the driver
1317 * This should start with the first IE (fixed fields before IEs
1318 * are not included).
1323 * resp_ies_len - Length of resp_ies in bytes
1325 size_t resp_ies_len;
1328 * beacon_ies - Beacon or Probe Response IEs
1330 * Optional Beacon/ProbeResp data: IEs included in Beacon or
1331 * Probe Response frames from the current AP (i.e., the one
1332 * that the client just associated with). This information is
1333 * used to update WPA/RSN IE for the AP. If this field is not
1334 * set, the results from previous scan will be used. If no
1335 * data for the new AP is found, scan results will be requested
1336 * again (without scan request). At this point, the driver is
1337 * expected to provide WPA/RSN IE for the AP (if WPA/WPA2 is
1340 * This should start with the first IE (fixed fields before IEs
1341 * are not included).
1346 * beacon_ies_len - Length of beacon_ies */
1347 size_t beacon_ies_len;
1351 * struct michael_mic_failure - Data for EVENT_MICHAEL_MIC_FAILURE
1353 struct michael_mic_failure {
1355 } michael_mic_failure;
1358 * struct interface_status - Data for EVENT_INTERFACE_STATUS
1360 struct interface_status {
1363 EVENT_INTERFACE_ADDED, EVENT_INTERFACE_REMOVED
1368 * struct pmkid_candidate - Data for EVENT_PMKID_CANDIDATE
1370 struct pmkid_candidate {
1371 /** BSSID of the PMKID candidate */
1373 /** Smaller the index, higher the priority */
1375 /** Whether RSN IE includes pre-authenticate flag */
1380 * struct stkstart - Data for EVENT_STKSTART
1387 * struct ft_ies - FT information elements (EVENT_FT_RESPONSE)
1389 * During FT (IEEE 802.11r) authentication sequence, the driver is
1390 * expected to use this event to report received FT IEs (MDIE, FTIE,
1391 * RSN IE, TIE, possible resource request) to the supplicant. The FT
1392 * IEs for the next message will be delivered through the
1393 * struct wpa_driver_ops::update_ft_ies() callback.
1399 u8 target_ap[ETH_ALEN];
1400 /** Optional IE(s), e.g., WMM TSPEC(s), for RIC-Request */
1402 /** Length of ric_ies buffer in octets */
1407 * struct ibss_rsn_start - Data for EVENT_IBSS_RSN_START
1409 struct ibss_rsn_start {
1414 * struct auth_info - Data for EVENT_AUTH events
1426 * wpa_supplicant_event - Report a driver event for wpa_supplicant
1427 * @ctx: Context pointer (wpa_s); this is the ctx variable registered
1428 * with struct wpa_driver_ops::init()
1429 * @event: event type (defined above)
1430 * @data: possible extra data for the event
1432 * Driver wrapper code should call this function whenever an event is received
1435 void wpa_supplicant_event(void *ctx, wpa_event_type event,
1436 union wpa_event_data *data);
1439 * wpa_supplicant_rx_eapol - Deliver a received EAPOL frame to wpa_supplicant
1440 * @ctx: Context pointer (wpa_s); this is the ctx variable registered
1441 * with struct wpa_driver_ops::init()
1442 * @src_addr: Source address of the EAPOL frame
1443 * @buf: EAPOL data starting from the EAPOL header (i.e., no Ethernet header)
1444 * @len: Length of the EAPOL data
1446 * This function is called for each received EAPOL frame. Most driver
1447 * interfaces rely on more generic OS mechanism for receiving frames through
1448 * l2_packet, but if such a mechanism is not available, the driver wrapper may
1449 * take care of received EAPOL frames and deliver them to the core supplicant
1450 * code by calling this function.
1452 void wpa_supplicant_rx_eapol(void *ctx, const u8 *src_addr,
1453 const u8 *buf, size_t len);
1455 void wpa_supplicant_sta_rx(void *ctx, const u8 *buf, size_t len,
1456 struct ieee80211_rx_status *rx_status);
1457 void wpa_supplicant_sta_free_hw_features(struct wpa_hw_modes *hw_features,
1458 size_t num_hw_features);
1460 const u8 * wpa_scan_get_ie(const struct wpa_scan_res *res, u8 ie);
1461 #define WPA_IE_VENDOR_TYPE 0x0050f201
1462 #define WPS_IE_VENDOR_TYPE 0x0050f204
1463 const u8 * wpa_scan_get_vendor_ie(const struct wpa_scan_res *res,
1465 struct wpabuf * wpa_scan_get_vendor_ie_multi(const struct wpa_scan_res *res,
1467 int wpa_scan_get_max_rate(const struct wpa_scan_res *res);
1468 void wpa_scan_results_free(struct wpa_scan_results *res);
1469 void wpa_scan_sort_results(struct wpa_scan_results *res);
1471 #endif /* DRIVER_H */