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SME: Fix re-try after auth/assoc timeout/failure
[thirdparty/hostap.git] / wpa_supplicant / sme.c
1 /*
2 * wpa_supplicant - SME
3 * Copyright (c) 2009-2010, Jouni Malinen <j@w1.fi>
4 *
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License version 2 as
7 * published by the Free Software Foundation.
8 *
9 * Alternatively, this software may be distributed under the terms of BSD
10 * license.
11 *
12 * See README and COPYING for more details.
13 */
14
15 #include "includes.h"
16
17 #include "common.h"
18 #include "common/ieee802_11_defs.h"
19 #include "common/ieee802_11_common.h"
20 #include "eapol_supp/eapol_supp_sm.h"
21 #include "common/wpa_common.h"
22 #include "rsn_supp/wpa.h"
23 #include "rsn_supp/pmksa_cache.h"
24 #include "config.h"
25 #include "wpa_supplicant_i.h"
26 #include "driver_i.h"
27 #include "wpas_glue.h"
28 #include "wps_supplicant.h"
29 #include "p2p_supplicant.h"
30 #include "notify.h"
31 #include "blacklist.h"
32 #include "bss.h"
33 #include "scan.h"
34 #include "sme.h"
35
36 static int sme_another_bss_in_ess(struct wpa_supplicant *wpa_s)
37 {
38 struct wpa_bss *bss, *cbss;
39
40 cbss = wpa_s->current_bss;
41
42 dl_list_for_each(bss, &wpa_s->bss, struct wpa_bss, list) {
43 if (bss == cbss)
44 continue;
45 if (bss->ssid_len == cbss->ssid_len &&
46 os_memcmp(bss->ssid, cbss->ssid, bss->ssid_len) == 0 &&
47 wpa_blacklist_get(wpa_s, bss->bssid) == NULL)
48 return 1;
49 }
50
51 return 0;
52 }
53
54
55 static void sme_connection_failed(struct wpa_supplicant *wpa_s,
56 const u8 *bssid)
57 {
58 int timeout;
59 int count;
60
61 /*
62 * Add the failed BSSID into the blacklist and speed up next scan
63 * attempt if there could be other APs that could accept association.
64 * The current blacklist count indicates how many times we have tried
65 * connecting to this AP and multiple attempts mean that other APs are
66 * either not available or has already been tried, so that we can start
67 * increasing the delay here to avoid constant scanning.
68 */
69 count = wpa_blacklist_add(wpa_s, bssid);
70 if (count == 1 && wpa_s->current_bss) {
71 /*
72 * This BSS was not in the blacklist before. If there is
73 * another BSS available for the same ESS, we should try that
74 * next. Otherwise, we may as well try this one once more
75 * before allowing other, likely worse, ESSes to be considered.
76 */
77 if (sme_another_bss_in_ess(wpa_s)) {
78 wpa_printf(MSG_DEBUG, "SME: Another BSS in this ESS "
79 "has been seen; try it next");
80 wpa_blacklist_add(wpa_s, bssid);
81 }
82 }
83
84 switch (count) {
85 case 1:
86 timeout = 100;
87 break;
88 case 2:
89 timeout = 500;
90 break;
91 case 3:
92 timeout = 1000;
93 break;
94 default:
95 timeout = 5000;
96 }
97
98 /*
99 * TODO: if more than one possible AP is available in scan results,
100 * could try the other ones before requesting a new scan.
101 */
102 wpa_supplicant_req_scan(wpa_s, timeout / 1000,
103 1000 * (timeout % 1000));
104 }
105
106
107 void sme_authenticate(struct wpa_supplicant *wpa_s,
108 struct wpa_bss *bss, struct wpa_ssid *ssid)
109 {
110 struct wpa_driver_auth_params params;
111 struct wpa_ssid *old_ssid;
112 #ifdef CONFIG_IEEE80211R
113 const u8 *ie;
114 #endif /* CONFIG_IEEE80211R */
115 #ifdef CONFIG_IEEE80211R
116 const u8 *md = NULL;
117 #endif /* CONFIG_IEEE80211R */
118 int i, bssid_changed;
119
120 if (bss == NULL) {
121 wpa_printf(MSG_ERROR, "SME: No scan result available for the "
122 "network");
123 return;
124 }
125
126 wpa_s->current_bss = bss;
127
128 os_memset(&params, 0, sizeof(params));
129 wpa_s->reassociate = 0;
130
131 params.freq = bss->freq;
132 params.bssid = bss->bssid;
133 params.ssid = bss->ssid;
134 params.ssid_len = bss->ssid_len;
135
136 if (wpa_s->sme.ssid_len != params.ssid_len ||
137 os_memcmp(wpa_s->sme.ssid, params.ssid, params.ssid_len) != 0)
138 wpa_s->sme.prev_bssid_set = 0;
139
140 wpa_s->sme.freq = params.freq;
141 os_memcpy(wpa_s->sme.ssid, params.ssid, params.ssid_len);
142 wpa_s->sme.ssid_len = params.ssid_len;
143
144 params.auth_alg = WPA_AUTH_ALG_OPEN;
145 #ifdef IEEE8021X_EAPOL
146 if (ssid->key_mgmt & WPA_KEY_MGMT_IEEE8021X_NO_WPA) {
147 if (ssid->leap) {
148 if (ssid->non_leap == 0)
149 params.auth_alg = WPA_AUTH_ALG_LEAP;
150 else
151 params.auth_alg |= WPA_AUTH_ALG_LEAP;
152 }
153 }
154 #endif /* IEEE8021X_EAPOL */
155 wpa_printf(MSG_DEBUG, "Automatic auth_alg selection: 0x%x",
156 params.auth_alg);
157 if (ssid->auth_alg) {
158 params.auth_alg = ssid->auth_alg;
159 wpa_printf(MSG_DEBUG, "Overriding auth_alg selection: 0x%x",
160 params.auth_alg);
161 }
162
163 for (i = 0; i < NUM_WEP_KEYS; i++) {
164 if (ssid->wep_key_len[i])
165 params.wep_key[i] = ssid->wep_key[i];
166 params.wep_key_len[i] = ssid->wep_key_len[i];
167 }
168 params.wep_tx_keyidx = ssid->wep_tx_keyidx;
169
170 bssid_changed = !is_zero_ether_addr(wpa_s->bssid);
171 os_memset(wpa_s->bssid, 0, ETH_ALEN);
172 os_memcpy(wpa_s->pending_bssid, bss->bssid, ETH_ALEN);
173 if (bssid_changed)
174 wpas_notify_bssid_changed(wpa_s);
175
176 if ((wpa_bss_get_vendor_ie(bss, WPA_IE_VENDOR_TYPE) ||
177 wpa_bss_get_ie(bss, WLAN_EID_RSN)) &&
178 (ssid->key_mgmt & (WPA_KEY_MGMT_IEEE8021X | WPA_KEY_MGMT_PSK |
179 WPA_KEY_MGMT_FT_IEEE8021X |
180 WPA_KEY_MGMT_FT_PSK |
181 WPA_KEY_MGMT_IEEE8021X_SHA256 |
182 WPA_KEY_MGMT_PSK_SHA256))) {
183 int try_opportunistic;
184 try_opportunistic = ssid->proactive_key_caching &&
185 (ssid->proto & WPA_PROTO_RSN);
186 if (pmksa_cache_set_current(wpa_s->wpa, NULL, bss->bssid,
187 wpa_s->current_ssid,
188 try_opportunistic) == 0)
189 eapol_sm_notify_pmkid_attempt(wpa_s->eapol, 1);
190 wpa_s->sme.assoc_req_ie_len = sizeof(wpa_s->sme.assoc_req_ie);
191 if (wpa_supplicant_set_suites(wpa_s, bss, ssid,
192 wpa_s->sme.assoc_req_ie,
193 &wpa_s->sme.assoc_req_ie_len)) {
194 wpa_printf(MSG_WARNING, "SME: Failed to set WPA key "
195 "management and encryption suites");
196 return;
197 }
198 } else if (ssid->key_mgmt &
199 (WPA_KEY_MGMT_PSK | WPA_KEY_MGMT_IEEE8021X |
200 WPA_KEY_MGMT_WPA_NONE | WPA_KEY_MGMT_FT_PSK |
201 WPA_KEY_MGMT_FT_IEEE8021X | WPA_KEY_MGMT_PSK_SHA256 |
202 WPA_KEY_MGMT_IEEE8021X_SHA256)) {
203 wpa_s->sme.assoc_req_ie_len = sizeof(wpa_s->sme.assoc_req_ie);
204 if (wpa_supplicant_set_suites(wpa_s, NULL, ssid,
205 wpa_s->sme.assoc_req_ie,
206 &wpa_s->sme.assoc_req_ie_len)) {
207 wpa_printf(MSG_WARNING, "SME: Failed to set WPA key "
208 "management and encryption suites (no scan "
209 "results)");
210 return;
211 }
212 #ifdef CONFIG_WPS
213 } else if (ssid->key_mgmt & WPA_KEY_MGMT_WPS) {
214 struct wpabuf *wps_ie;
215 wps_ie = wps_build_assoc_req_ie(wpas_wps_get_req_type(ssid));
216 if (wps_ie && wpabuf_len(wps_ie) <=
217 sizeof(wpa_s->sme.assoc_req_ie)) {
218 wpa_s->sme.assoc_req_ie_len = wpabuf_len(wps_ie);
219 os_memcpy(wpa_s->sme.assoc_req_ie, wpabuf_head(wps_ie),
220 wpa_s->sme.assoc_req_ie_len);
221 } else
222 wpa_s->sme.assoc_req_ie_len = 0;
223 wpabuf_free(wps_ie);
224 wpa_supplicant_set_non_wpa_policy(wpa_s, ssid);
225 #endif /* CONFIG_WPS */
226 } else {
227 wpa_supplicant_set_non_wpa_policy(wpa_s, ssid);
228 wpa_s->sme.assoc_req_ie_len = 0;
229 }
230
231 #ifdef CONFIG_IEEE80211R
232 ie = wpa_bss_get_ie(bss, WLAN_EID_MOBILITY_DOMAIN);
233 if (ie && ie[1] >= MOBILITY_DOMAIN_ID_LEN)
234 md = ie + 2;
235 wpa_sm_set_ft_params(wpa_s->wpa, ie, ie ? 2 + ie[1] : 0);
236 if (md) {
237 /* Prepare for the next transition */
238 wpa_ft_prepare_auth_request(wpa_s->wpa, ie);
239 }
240
241 if (md && ssid->key_mgmt & (WPA_KEY_MGMT_FT_PSK |
242 WPA_KEY_MGMT_FT_IEEE8021X)) {
243 if (wpa_s->sme.assoc_req_ie_len + 5 <
244 sizeof(wpa_s->sme.assoc_req_ie)) {
245 struct rsn_mdie *mdie;
246 u8 *pos = wpa_s->sme.assoc_req_ie +
247 wpa_s->sme.assoc_req_ie_len;
248 *pos++ = WLAN_EID_MOBILITY_DOMAIN;
249 *pos++ = sizeof(*mdie);
250 mdie = (struct rsn_mdie *) pos;
251 os_memcpy(mdie->mobility_domain, md,
252 MOBILITY_DOMAIN_ID_LEN);
253 mdie->ft_capab = md[MOBILITY_DOMAIN_ID_LEN];
254 wpa_s->sme.assoc_req_ie_len += 5;
255 }
256
257 if (wpa_s->sme.ft_used &&
258 os_memcmp(md, wpa_s->sme.mobility_domain, 2) == 0 &&
259 wpa_sm_has_ptk(wpa_s->wpa)) {
260 wpa_printf(MSG_DEBUG, "SME: Trying to use FT "
261 "over-the-air");
262 params.auth_alg = WPA_AUTH_ALG_FT;
263 params.ie = wpa_s->sme.ft_ies;
264 params.ie_len = wpa_s->sme.ft_ies_len;
265 }
266 }
267 #endif /* CONFIG_IEEE80211R */
268
269 #ifdef CONFIG_IEEE80211W
270 wpa_s->sme.mfp = ssid->ieee80211w;
271 if (ssid->ieee80211w != NO_MGMT_FRAME_PROTECTION) {
272 const u8 *rsn = wpa_bss_get_ie(bss, WLAN_EID_RSN);
273 struct wpa_ie_data _ie;
274 if (rsn && wpa_parse_wpa_ie(rsn, 2 + rsn[1], &_ie) == 0 &&
275 _ie.capabilities &
276 (WPA_CAPABILITY_MFPC | WPA_CAPABILITY_MFPR)) {
277 wpa_printf(MSG_DEBUG, "WPA: Selected AP supports MFP: "
278 "require MFP");
279 wpa_s->sme.mfp = MGMT_FRAME_PROTECTION_REQUIRED;
280 }
281 }
282 #endif /* CONFIG_IEEE80211W */
283
284 #ifdef CONFIG_P2P
285 if (wpa_s->global->p2p) {
286 u8 *pos;
287 size_t len;
288 int res;
289 int p2p_group;
290 p2p_group = wpa_s->drv_flags & WPA_DRIVER_FLAGS_P2P_CAPABLE;
291 pos = wpa_s->sme.assoc_req_ie + wpa_s->sme.assoc_req_ie_len;
292 len = sizeof(wpa_s->sme.assoc_req_ie) -
293 wpa_s->sme.assoc_req_ie_len;
294 res = wpas_p2p_assoc_req_ie(wpa_s, bss, pos, len, p2p_group);
295 if (res >= 0)
296 wpa_s->sme.assoc_req_ie_len += res;
297 }
298 #endif /* CONFIG_P2P */
299
300 wpa_supplicant_cancel_scan(wpa_s);
301
302 wpa_msg(wpa_s, MSG_INFO, "Trying to authenticate with " MACSTR
303 " (SSID='%s' freq=%d MHz)", MAC2STR(params.bssid),
304 wpa_ssid_txt(params.ssid, params.ssid_len), params.freq);
305
306 wpa_clear_keys(wpa_s, bss->bssid);
307 wpa_supplicant_set_state(wpa_s, WPA_AUTHENTICATING);
308 old_ssid = wpa_s->current_ssid;
309 wpa_s->current_ssid = ssid;
310 wpa_supplicant_rsn_supp_set_config(wpa_s, wpa_s->current_ssid);
311 wpa_supplicant_initiate_eapol(wpa_s);
312 if (old_ssid != wpa_s->current_ssid)
313 wpas_notify_network_changed(wpa_s);
314
315 wpa_s->sme.auth_alg = params.auth_alg;
316 if (wpa_drv_authenticate(wpa_s, &params) < 0) {
317 wpa_msg(wpa_s, MSG_INFO, "Authentication request to the "
318 "driver failed");
319 wpa_supplicant_req_scan(wpa_s, 1, 0);
320 return;
321 }
322
323 /* TODO: add timeout on authentication */
324
325 /*
326 * Association will be started based on the authentication event from
327 * the driver.
328 */
329 }
330
331
332 void sme_event_auth(struct wpa_supplicant *wpa_s, union wpa_event_data *data)
333 {
334 struct wpa_ssid *ssid = wpa_s->current_ssid;
335
336 if (ssid == NULL) {
337 wpa_printf(MSG_DEBUG, "SME: Ignore authentication event when "
338 "network is not selected");
339 return;
340 }
341
342 if (wpa_s->wpa_state != WPA_AUTHENTICATING) {
343 wpa_printf(MSG_DEBUG, "SME: Ignore authentication event when "
344 "not in authenticating state");
345 return;
346 }
347
348 if (os_memcmp(wpa_s->pending_bssid, data->auth.peer, ETH_ALEN) != 0) {
349 wpa_printf(MSG_DEBUG, "SME: Ignore authentication with "
350 "unexpected peer " MACSTR,
351 MAC2STR(data->auth.peer));
352 return;
353 }
354
355 wpa_printf(MSG_DEBUG, "SME: Authentication response: peer=" MACSTR
356 " auth_type=%d status_code=%d",
357 MAC2STR(data->auth.peer), data->auth.auth_type,
358 data->auth.status_code);
359 wpa_hexdump(MSG_MSGDUMP, "SME: Authentication response IEs",
360 data->auth.ies, data->auth.ies_len);
361
362 if (data->auth.status_code != WLAN_STATUS_SUCCESS) {
363 wpa_printf(MSG_DEBUG, "SME: Authentication failed (status "
364 "code %d)", data->auth.status_code);
365
366 if (data->auth.status_code !=
367 WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG ||
368 wpa_s->sme.auth_alg == data->auth.auth_type ||
369 wpa_s->current_ssid->auth_alg == WPA_AUTH_ALG_LEAP) {
370 sme_connection_failed(wpa_s, wpa_s->pending_bssid);
371 return;
372 }
373
374 switch (data->auth.auth_type) {
375 case WLAN_AUTH_OPEN:
376 wpa_s->current_ssid->auth_alg = WPA_AUTH_ALG_SHARED;
377
378 wpa_printf(MSG_DEBUG, "SME: Trying SHARED auth");
379 wpa_supplicant_associate(wpa_s, wpa_s->current_bss,
380 wpa_s->current_ssid);
381 return;
382
383 case WLAN_AUTH_SHARED_KEY:
384 wpa_s->current_ssid->auth_alg = WPA_AUTH_ALG_LEAP;
385
386 wpa_printf(MSG_DEBUG, "SME: Trying LEAP auth");
387 wpa_supplicant_associate(wpa_s, wpa_s->current_bss,
388 wpa_s->current_ssid);
389 return;
390
391 default:
392 return;
393 }
394 }
395
396 #ifdef CONFIG_IEEE80211R
397 if (data->auth.auth_type == WLAN_AUTH_FT) {
398 union wpa_event_data edata;
399 os_memset(&edata, 0, sizeof(edata));
400 edata.ft_ies.ies = data->auth.ies;
401 edata.ft_ies.ies_len = data->auth.ies_len;
402 os_memcpy(edata.ft_ies.target_ap, data->auth.peer, ETH_ALEN);
403 wpa_supplicant_event(wpa_s, EVENT_FT_RESPONSE, &edata);
404 }
405 #endif /* CONFIG_IEEE80211R */
406
407 sme_associate(wpa_s, ssid->mode, data->auth.peer,
408 data->auth.auth_type);
409 }
410
411
412 void sme_associate(struct wpa_supplicant *wpa_s, enum wpas_mode mode,
413 const u8 *bssid, u16 auth_type)
414 {
415 struct wpa_driver_associate_params params;
416 struct ieee802_11_elems elems;
417
418 os_memset(&params, 0, sizeof(params));
419 params.bssid = bssid;
420 params.ssid = wpa_s->sme.ssid;
421 params.ssid_len = wpa_s->sme.ssid_len;
422 params.freq = wpa_s->sme.freq;
423 params.wpa_ie = wpa_s->sme.assoc_req_ie_len ?
424 wpa_s->sme.assoc_req_ie : NULL;
425 params.wpa_ie_len = wpa_s->sme.assoc_req_ie_len;
426 #ifdef CONFIG_IEEE80211R
427 if (auth_type == WLAN_AUTH_FT && wpa_s->sme.ft_ies) {
428 params.wpa_ie = wpa_s->sme.ft_ies;
429 params.wpa_ie_len = wpa_s->sme.ft_ies_len;
430 }
431 #endif /* CONFIG_IEEE80211R */
432 params.mode = mode;
433 params.mgmt_frame_protection = wpa_s->sme.mfp;
434 if (wpa_s->sme.prev_bssid_set)
435 params.prev_bssid = wpa_s->sme.prev_bssid;
436
437 wpa_msg(wpa_s, MSG_INFO, "Trying to associate with " MACSTR
438 " (SSID='%s' freq=%d MHz)", MAC2STR(params.bssid),
439 params.ssid ? wpa_ssid_txt(params.ssid, params.ssid_len) : "",
440 params.freq);
441
442 wpa_supplicant_set_state(wpa_s, WPA_ASSOCIATING);
443
444 if (params.wpa_ie == NULL ||
445 ieee802_11_parse_elems(params.wpa_ie, params.wpa_ie_len, &elems, 0)
446 < 0) {
447 wpa_printf(MSG_DEBUG, "SME: Could not parse own IEs?!");
448 os_memset(&elems, 0, sizeof(elems));
449 }
450 if (elems.rsn_ie)
451 wpa_sm_set_assoc_wpa_ie(wpa_s->wpa, elems.rsn_ie - 2,
452 elems.rsn_ie_len + 2);
453 else if (elems.wpa_ie)
454 wpa_sm_set_assoc_wpa_ie(wpa_s->wpa, elems.wpa_ie - 2,
455 elems.wpa_ie_len + 2);
456 else
457 wpa_sm_set_assoc_wpa_ie(wpa_s->wpa, NULL, 0);
458 if (elems.p2p &&
459 (wpa_s->drv_flags & WPA_DRIVER_FLAGS_P2P_CAPABLE))
460 params.p2p = 1;
461
462 if (wpa_s->parent->set_sta_uapsd)
463 params.uapsd = wpa_s->parent->sta_uapsd;
464 else
465 params.uapsd = -1;
466
467 if (wpa_drv_associate(wpa_s, &params) < 0) {
468 wpa_msg(wpa_s, MSG_INFO, "Association request to the driver "
469 "failed");
470 wpa_supplicant_req_scan(wpa_s, 5, 0);
471 return;
472 }
473
474 /* TODO: add timeout on association */
475 }
476
477
478 int sme_update_ft_ies(struct wpa_supplicant *wpa_s, const u8 *md,
479 const u8 *ies, size_t ies_len)
480 {
481 if (md == NULL || ies == NULL) {
482 wpa_printf(MSG_DEBUG, "SME: Remove mobility domain");
483 os_free(wpa_s->sme.ft_ies);
484 wpa_s->sme.ft_ies = NULL;
485 wpa_s->sme.ft_ies_len = 0;
486 wpa_s->sme.ft_used = 0;
487 return 0;
488 }
489
490 os_memcpy(wpa_s->sme.mobility_domain, md, MOBILITY_DOMAIN_ID_LEN);
491 wpa_hexdump(MSG_DEBUG, "SME: FT IEs", ies, ies_len);
492 os_free(wpa_s->sme.ft_ies);
493 wpa_s->sme.ft_ies = os_malloc(ies_len);
494 if (wpa_s->sme.ft_ies == NULL)
495 return -1;
496 os_memcpy(wpa_s->sme.ft_ies, ies, ies_len);
497 wpa_s->sme.ft_ies_len = ies_len;
498 return 0;
499 }
500
501
502 void sme_event_assoc_reject(struct wpa_supplicant *wpa_s,
503 union wpa_event_data *data)
504 {
505 int bssid_changed;
506
507 wpa_printf(MSG_DEBUG, "SME: Association with " MACSTR " failed: "
508 "status code %d", MAC2STR(wpa_s->pending_bssid),
509 data->assoc_reject.status_code);
510
511 bssid_changed = !is_zero_ether_addr(wpa_s->bssid);
512
513 /*
514 * For now, unconditionally terminate the previous authentication. In
515 * theory, this should not be needed, but mac80211 gets quite confused
516 * if the authentication is left pending.. Some roaming cases might
517 * benefit from using the previous authentication, so this could be
518 * optimized in the future.
519 */
520 if (wpa_drv_deauthenticate(wpa_s, wpa_s->pending_bssid,
521 WLAN_REASON_DEAUTH_LEAVING) < 0) {
522 wpa_msg(wpa_s, MSG_INFO,
523 "Deauth request to the driver failed");
524 }
525 wpa_s->sme.prev_bssid_set = 0;
526
527 sme_connection_failed(wpa_s, wpa_s->pending_bssid);
528 wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED);
529 os_memset(wpa_s->bssid, 0, ETH_ALEN);
530 os_memset(wpa_s->pending_bssid, 0, ETH_ALEN);
531 if (bssid_changed)
532 wpas_notify_bssid_changed(wpa_s);
533 }
534
535
536 void sme_event_auth_timed_out(struct wpa_supplicant *wpa_s,
537 union wpa_event_data *data)
538 {
539 wpa_printf(MSG_DEBUG, "SME: Authentication timed out");
540 sme_connection_failed(wpa_s, wpa_s->pending_bssid);
541 }
542
543
544 void sme_event_assoc_timed_out(struct wpa_supplicant *wpa_s,
545 union wpa_event_data *data)
546 {
547 wpa_printf(MSG_DEBUG, "SME: Association timed out");
548 sme_connection_failed(wpa_s, wpa_s->pending_bssid);
549 wpa_supplicant_mark_disassoc(wpa_s);
550 }
551
552
553 void sme_event_disassoc(struct wpa_supplicant *wpa_s,
554 union wpa_event_data *data)
555 {
556 wpa_printf(MSG_DEBUG, "SME: Disassociation event received");
557 if (wpa_s->sme.prev_bssid_set &&
558 !(wpa_s->drv_flags & WPA_DRIVER_FLAGS_USER_SPACE_MLME)) {
559 /*
560 * cfg80211/mac80211 can get into somewhat confused state if
561 * the AP only disassociates us and leaves us in authenticated
562 * state. For now, force the state to be cleared to avoid
563 * confusing errors if we try to associate with the AP again.
564 */
565 wpa_printf(MSG_DEBUG, "SME: Deauthenticate to clear driver "
566 "state");
567 wpa_drv_deauthenticate(wpa_s, wpa_s->sme.prev_bssid,
568 WLAN_REASON_DEAUTH_LEAVING);
569 }
570 }