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FILS: Try to use FILS authentication if PMKSA or ERP entry is available
[thirdparty/hostap.git] / wpa_supplicant / sme.c
1 /*
2 * wpa_supplicant - SME
3 * Copyright (c) 2009-2014, Jouni Malinen <j@w1.fi>
4 *
5 * This software may be distributed under the terms of the BSD license.
6 * See README for more details.
7 */
8
9 #include "includes.h"
10
11 #include "common.h"
12 #include "utils/eloop.h"
13 #include "common/ieee802_11_defs.h"
14 #include "common/ieee802_11_common.h"
15 #include "eapol_supp/eapol_supp_sm.h"
16 #include "common/wpa_common.h"
17 #include "common/sae.h"
18 #include "rsn_supp/wpa.h"
19 #include "rsn_supp/pmksa_cache.h"
20 #include "config.h"
21 #include "wpa_supplicant_i.h"
22 #include "driver_i.h"
23 #include "wpas_glue.h"
24 #include "wps_supplicant.h"
25 #include "p2p_supplicant.h"
26 #include "notify.h"
27 #include "bss.h"
28 #include "scan.h"
29 #include "sme.h"
30 #include "hs20_supplicant.h"
31
32 #define SME_AUTH_TIMEOUT 5
33 #define SME_ASSOC_TIMEOUT 5
34
35 static void sme_auth_timer(void *eloop_ctx, void *timeout_ctx);
36 static void sme_assoc_timer(void *eloop_ctx, void *timeout_ctx);
37 static void sme_obss_scan_timeout(void *eloop_ctx, void *timeout_ctx);
38 #ifdef CONFIG_IEEE80211W
39 static void sme_stop_sa_query(struct wpa_supplicant *wpa_s);
40 #endif /* CONFIG_IEEE80211W */
41
42
43 #ifdef CONFIG_SAE
44
45 static int index_within_array(const int *array, int idx)
46 {
47 int i;
48 for (i = 0; i < idx; i++) {
49 if (array[i] <= 0)
50 return 0;
51 }
52 return 1;
53 }
54
55
56 static int sme_set_sae_group(struct wpa_supplicant *wpa_s)
57 {
58 int *groups = wpa_s->conf->sae_groups;
59 int default_groups[] = { 19, 20, 21, 25, 26, 0 };
60
61 if (!groups || groups[0] <= 0)
62 groups = default_groups;
63
64 /* Configuration may have changed, so validate current index */
65 if (!index_within_array(groups, wpa_s->sme.sae_group_index))
66 return -1;
67
68 for (;;) {
69 int group = groups[wpa_s->sme.sae_group_index];
70 if (group <= 0)
71 break;
72 if (sae_set_group(&wpa_s->sme.sae, group) == 0) {
73 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Selected SAE group %d",
74 wpa_s->sme.sae.group);
75 return 0;
76 }
77 wpa_s->sme.sae_group_index++;
78 }
79
80 return -1;
81 }
82
83
84 static struct wpabuf * sme_auth_build_sae_commit(struct wpa_supplicant *wpa_s,
85 struct wpa_ssid *ssid,
86 const u8 *bssid)
87 {
88 struct wpabuf *buf;
89 size_t len;
90
91 if (ssid->passphrase == NULL) {
92 wpa_printf(MSG_DEBUG, "SAE: No password available");
93 return NULL;
94 }
95
96 if (sme_set_sae_group(wpa_s) < 0) {
97 wpa_printf(MSG_DEBUG, "SAE: Failed to select group");
98 return NULL;
99 }
100
101 if (sae_prepare_commit(wpa_s->own_addr, bssid,
102 (u8 *) ssid->passphrase,
103 os_strlen(ssid->passphrase),
104 &wpa_s->sme.sae) < 0) {
105 wpa_printf(MSG_DEBUG, "SAE: Could not pick PWE");
106 return NULL;
107 }
108
109 len = wpa_s->sme.sae_token ? wpabuf_len(wpa_s->sme.sae_token) : 0;
110 buf = wpabuf_alloc(4 + SAE_COMMIT_MAX_LEN + len);
111 if (buf == NULL)
112 return NULL;
113
114 wpabuf_put_le16(buf, 1); /* Transaction seq# */
115 wpabuf_put_le16(buf, WLAN_STATUS_SUCCESS);
116 sae_write_commit(&wpa_s->sme.sae, buf, wpa_s->sme.sae_token);
117
118 return buf;
119 }
120
121
122 static struct wpabuf * sme_auth_build_sae_confirm(struct wpa_supplicant *wpa_s)
123 {
124 struct wpabuf *buf;
125
126 buf = wpabuf_alloc(4 + SAE_CONFIRM_MAX_LEN);
127 if (buf == NULL)
128 return NULL;
129
130 wpabuf_put_le16(buf, 2); /* Transaction seq# */
131 wpabuf_put_le16(buf, WLAN_STATUS_SUCCESS);
132 sae_write_confirm(&wpa_s->sme.sae, buf);
133
134 return buf;
135 }
136
137 #endif /* CONFIG_SAE */
138
139
140 /**
141 * sme_auth_handle_rrm - Handle RRM aspects of current authentication attempt
142 * @wpa_s: Pointer to wpa_supplicant data
143 * @bss: Pointer to the bss which is the target of authentication attempt
144 */
145 static void sme_auth_handle_rrm(struct wpa_supplicant *wpa_s,
146 struct wpa_bss *bss)
147 {
148 const u8 rrm_ie_len = 5;
149 u8 *pos;
150 const u8 *rrm_ie;
151
152 wpa_s->rrm.rrm_used = 0;
153
154 wpa_printf(MSG_DEBUG,
155 "RRM: Determining whether RRM can be used - device support: 0x%x",
156 wpa_s->drv_rrm_flags);
157
158 rrm_ie = wpa_bss_get_ie(bss, WLAN_EID_RRM_ENABLED_CAPABILITIES);
159 if (!rrm_ie || !(bss->caps & IEEE80211_CAP_RRM)) {
160 wpa_printf(MSG_DEBUG, "RRM: No RRM in network");
161 return;
162 }
163
164 if (!((wpa_s->drv_rrm_flags &
165 WPA_DRIVER_FLAGS_DS_PARAM_SET_IE_IN_PROBES) &&
166 (wpa_s->drv_rrm_flags & WPA_DRIVER_FLAGS_QUIET)) &&
167 !(wpa_s->drv_rrm_flags & WPA_DRIVER_FLAGS_SUPPORT_RRM)) {
168 wpa_printf(MSG_DEBUG,
169 "RRM: Insufficient RRM support in driver - do not use RRM");
170 return;
171 }
172
173 if (sizeof(wpa_s->sme.assoc_req_ie) <
174 wpa_s->sme.assoc_req_ie_len + rrm_ie_len + 2) {
175 wpa_printf(MSG_INFO,
176 "RRM: Unable to use RRM, no room for RRM IE");
177 return;
178 }
179
180 wpa_printf(MSG_DEBUG, "RRM: Adding RRM IE to Association Request");
181 pos = wpa_s->sme.assoc_req_ie + wpa_s->sme.assoc_req_ie_len;
182 os_memset(pos, 0, 2 + rrm_ie_len);
183 *pos++ = WLAN_EID_RRM_ENABLED_CAPABILITIES;
184 *pos++ = rrm_ie_len;
185
186 /* Set supported capabilites flags */
187 if (wpa_s->drv_rrm_flags & WPA_DRIVER_FLAGS_TX_POWER_INSERTION)
188 *pos |= WLAN_RRM_CAPS_LINK_MEASUREMENT;
189
190 if (wpa_s->lci)
191 pos[1] |= WLAN_RRM_CAPS_LCI_MEASUREMENT;
192
193 wpa_s->sme.assoc_req_ie_len += rrm_ie_len + 2;
194 wpa_s->rrm.rrm_used = 1;
195 }
196
197
198 static void sme_send_authentication(struct wpa_supplicant *wpa_s,
199 struct wpa_bss *bss, struct wpa_ssid *ssid,
200 int start)
201 {
202 struct wpa_driver_auth_params params;
203 struct wpa_ssid *old_ssid;
204 #ifdef CONFIG_IEEE80211R
205 const u8 *ie;
206 #endif /* CONFIG_IEEE80211R */
207 #ifdef CONFIG_IEEE80211R
208 const u8 *md = NULL;
209 #endif /* CONFIG_IEEE80211R */
210 int i, bssid_changed;
211 struct wpabuf *resp = NULL;
212 u8 ext_capab[18];
213 int ext_capab_len;
214 int skip_auth;
215 #ifdef CONFIG_MBO
216 const u8 *mbo;
217 #endif /* CONFIG_MBO */
218
219 if (bss == NULL) {
220 wpa_msg(wpa_s, MSG_ERROR, "SME: No scan result available for "
221 "the network");
222 wpas_connect_work_done(wpa_s);
223 return;
224 }
225
226 skip_auth = wpa_s->conf->reassoc_same_bss_optim &&
227 wpa_s->reassoc_same_bss;
228 wpa_s->current_bss = bss;
229
230 os_memset(&params, 0, sizeof(params));
231 wpa_s->reassociate = 0;
232
233 params.freq = bss->freq;
234 params.bssid = bss->bssid;
235 params.ssid = bss->ssid;
236 params.ssid_len = bss->ssid_len;
237 params.p2p = ssid->p2p_group;
238
239 if (wpa_s->sme.ssid_len != params.ssid_len ||
240 os_memcmp(wpa_s->sme.ssid, params.ssid, params.ssid_len) != 0)
241 wpa_s->sme.prev_bssid_set = 0;
242
243 wpa_s->sme.freq = params.freq;
244 os_memcpy(wpa_s->sme.ssid, params.ssid, params.ssid_len);
245 wpa_s->sme.ssid_len = params.ssid_len;
246
247 params.auth_alg = WPA_AUTH_ALG_OPEN;
248 #ifdef IEEE8021X_EAPOL
249 if (ssid->key_mgmt & WPA_KEY_MGMT_IEEE8021X_NO_WPA) {
250 if (ssid->leap) {
251 if (ssid->non_leap == 0)
252 params.auth_alg = WPA_AUTH_ALG_LEAP;
253 else
254 params.auth_alg |= WPA_AUTH_ALG_LEAP;
255 }
256 }
257 #endif /* IEEE8021X_EAPOL */
258 wpa_dbg(wpa_s, MSG_DEBUG, "Automatic auth_alg selection: 0x%x",
259 params.auth_alg);
260 if (ssid->auth_alg) {
261 params.auth_alg = ssid->auth_alg;
262 wpa_dbg(wpa_s, MSG_DEBUG, "Overriding auth_alg selection: "
263 "0x%x", params.auth_alg);
264 }
265 #ifdef CONFIG_SAE
266 wpa_s->sme.sae_pmksa_caching = 0;
267 if (wpa_key_mgmt_sae(ssid->key_mgmt)) {
268 const u8 *rsn;
269 struct wpa_ie_data ied;
270
271 rsn = wpa_bss_get_ie(bss, WLAN_EID_RSN);
272 if (!rsn) {
273 wpa_dbg(wpa_s, MSG_DEBUG,
274 "SAE enabled, but target BSS does not advertise RSN");
275 } else if (wpa_parse_wpa_ie(rsn, 2 + rsn[1], &ied) == 0 &&
276 wpa_key_mgmt_sae(ied.key_mgmt)) {
277 wpa_dbg(wpa_s, MSG_DEBUG, "Using SAE auth_alg");
278 params.auth_alg = WPA_AUTH_ALG_SAE;
279 } else {
280 wpa_dbg(wpa_s, MSG_DEBUG,
281 "SAE enabled, but target BSS does not advertise SAE AKM for RSN");
282 }
283 }
284 #endif /* CONFIG_SAE */
285
286 for (i = 0; i < NUM_WEP_KEYS; i++) {
287 if (ssid->wep_key_len[i])
288 params.wep_key[i] = ssid->wep_key[i];
289 params.wep_key_len[i] = ssid->wep_key_len[i];
290 }
291 params.wep_tx_keyidx = ssid->wep_tx_keyidx;
292
293 bssid_changed = !is_zero_ether_addr(wpa_s->bssid);
294 os_memset(wpa_s->bssid, 0, ETH_ALEN);
295 os_memcpy(wpa_s->pending_bssid, bss->bssid, ETH_ALEN);
296 if (bssid_changed)
297 wpas_notify_bssid_changed(wpa_s);
298
299 if ((wpa_bss_get_vendor_ie(bss, WPA_IE_VENDOR_TYPE) ||
300 wpa_bss_get_ie(bss, WLAN_EID_RSN)) &&
301 wpa_key_mgmt_wpa(ssid->key_mgmt)) {
302 int try_opportunistic;
303 try_opportunistic = (ssid->proactive_key_caching < 0 ?
304 wpa_s->conf->okc :
305 ssid->proactive_key_caching) &&
306 (ssid->proto & WPA_PROTO_RSN);
307 if (pmksa_cache_set_current(wpa_s->wpa, NULL, bss->bssid,
308 wpa_s->current_ssid,
309 try_opportunistic) == 0)
310 eapol_sm_notify_pmkid_attempt(wpa_s->eapol);
311 wpa_s->sme.assoc_req_ie_len = sizeof(wpa_s->sme.assoc_req_ie);
312 if (wpa_supplicant_set_suites(wpa_s, bss, ssid,
313 wpa_s->sme.assoc_req_ie,
314 &wpa_s->sme.assoc_req_ie_len)) {
315 wpa_msg(wpa_s, MSG_WARNING, "SME: Failed to set WPA "
316 "key management and encryption suites");
317 wpas_connect_work_done(wpa_s);
318 return;
319 }
320 } else if ((ssid->key_mgmt & WPA_KEY_MGMT_IEEE8021X_NO_WPA) &&
321 wpa_key_mgmt_wpa_ieee8021x(ssid->key_mgmt)) {
322 /*
323 * Both WPA and non-WPA IEEE 802.1X enabled in configuration -
324 * use non-WPA since the scan results did not indicate that the
325 * AP is using WPA or WPA2.
326 */
327 wpa_supplicant_set_non_wpa_policy(wpa_s, ssid);
328 wpa_s->sme.assoc_req_ie_len = 0;
329 } else if (wpa_key_mgmt_wpa_any(ssid->key_mgmt)) {
330 wpa_s->sme.assoc_req_ie_len = sizeof(wpa_s->sme.assoc_req_ie);
331 if (wpa_supplicant_set_suites(wpa_s, NULL, ssid,
332 wpa_s->sme.assoc_req_ie,
333 &wpa_s->sme.assoc_req_ie_len)) {
334 wpa_msg(wpa_s, MSG_WARNING, "SME: Failed to set WPA "
335 "key management and encryption suites (no "
336 "scan results)");
337 wpas_connect_work_done(wpa_s);
338 return;
339 }
340 #ifdef CONFIG_WPS
341 } else if (ssid->key_mgmt & WPA_KEY_MGMT_WPS) {
342 struct wpabuf *wps_ie;
343 wps_ie = wps_build_assoc_req_ie(wpas_wps_get_req_type(ssid));
344 if (wps_ie && wpabuf_len(wps_ie) <=
345 sizeof(wpa_s->sme.assoc_req_ie)) {
346 wpa_s->sme.assoc_req_ie_len = wpabuf_len(wps_ie);
347 os_memcpy(wpa_s->sme.assoc_req_ie, wpabuf_head(wps_ie),
348 wpa_s->sme.assoc_req_ie_len);
349 } else
350 wpa_s->sme.assoc_req_ie_len = 0;
351 wpabuf_free(wps_ie);
352 wpa_supplicant_set_non_wpa_policy(wpa_s, ssid);
353 #endif /* CONFIG_WPS */
354 } else {
355 wpa_supplicant_set_non_wpa_policy(wpa_s, ssid);
356 wpa_s->sme.assoc_req_ie_len = 0;
357 }
358
359 #ifdef CONFIG_IEEE80211R
360 ie = wpa_bss_get_ie(bss, WLAN_EID_MOBILITY_DOMAIN);
361 if (ie && ie[1] >= MOBILITY_DOMAIN_ID_LEN)
362 md = ie + 2;
363 wpa_sm_set_ft_params(wpa_s->wpa, ie, ie ? 2 + ie[1] : 0);
364 if (md) {
365 /* Prepare for the next transition */
366 wpa_ft_prepare_auth_request(wpa_s->wpa, ie);
367 }
368
369 if (md && wpa_key_mgmt_ft(ssid->key_mgmt)) {
370 if (wpa_s->sme.assoc_req_ie_len + 5 <
371 sizeof(wpa_s->sme.assoc_req_ie)) {
372 struct rsn_mdie *mdie;
373 u8 *pos = wpa_s->sme.assoc_req_ie +
374 wpa_s->sme.assoc_req_ie_len;
375 *pos++ = WLAN_EID_MOBILITY_DOMAIN;
376 *pos++ = sizeof(*mdie);
377 mdie = (struct rsn_mdie *) pos;
378 os_memcpy(mdie->mobility_domain, md,
379 MOBILITY_DOMAIN_ID_LEN);
380 mdie->ft_capab = md[MOBILITY_DOMAIN_ID_LEN];
381 wpa_s->sme.assoc_req_ie_len += 5;
382 }
383
384 if (wpa_s->sme.ft_used &&
385 os_memcmp(md, wpa_s->sme.mobility_domain, 2) == 0 &&
386 wpa_sm_has_ptk(wpa_s->wpa)) {
387 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Trying to use FT "
388 "over-the-air");
389 params.auth_alg = WPA_AUTH_ALG_FT;
390 params.ie = wpa_s->sme.ft_ies;
391 params.ie_len = wpa_s->sme.ft_ies_len;
392 }
393 }
394 #endif /* CONFIG_IEEE80211R */
395
396 #ifdef CONFIG_IEEE80211W
397 wpa_s->sme.mfp = wpas_get_ssid_pmf(wpa_s, ssid);
398 if (wpa_s->sme.mfp != NO_MGMT_FRAME_PROTECTION) {
399 const u8 *rsn = wpa_bss_get_ie(bss, WLAN_EID_RSN);
400 struct wpa_ie_data _ie;
401 if (rsn && wpa_parse_wpa_ie(rsn, 2 + rsn[1], &_ie) == 0 &&
402 _ie.capabilities &
403 (WPA_CAPABILITY_MFPC | WPA_CAPABILITY_MFPR)) {
404 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Selected AP supports "
405 "MFP: require MFP");
406 wpa_s->sme.mfp = MGMT_FRAME_PROTECTION_REQUIRED;
407 }
408 }
409 #endif /* CONFIG_IEEE80211W */
410
411 #ifdef CONFIG_P2P
412 if (wpa_s->global->p2p) {
413 u8 *pos;
414 size_t len;
415 int res;
416 pos = wpa_s->sme.assoc_req_ie + wpa_s->sme.assoc_req_ie_len;
417 len = sizeof(wpa_s->sme.assoc_req_ie) -
418 wpa_s->sme.assoc_req_ie_len;
419 res = wpas_p2p_assoc_req_ie(wpa_s, bss, pos, len,
420 ssid->p2p_group);
421 if (res >= 0)
422 wpa_s->sme.assoc_req_ie_len += res;
423 }
424 #endif /* CONFIG_P2P */
425
426 #ifdef CONFIG_FST
427 if (wpa_s->fst_ies) {
428 int fst_ies_len = wpabuf_len(wpa_s->fst_ies);
429
430 if (wpa_s->sme.assoc_req_ie_len + fst_ies_len <=
431 sizeof(wpa_s->sme.assoc_req_ie)) {
432 os_memcpy(wpa_s->sme.assoc_req_ie +
433 wpa_s->sme.assoc_req_ie_len,
434 wpabuf_head(wpa_s->fst_ies),
435 fst_ies_len);
436 wpa_s->sme.assoc_req_ie_len += fst_ies_len;
437 }
438 }
439 #endif /* CONFIG_FST */
440
441 sme_auth_handle_rrm(wpa_s, bss);
442
443 #ifdef CONFIG_MBO
444 mbo = wpa_bss_get_vendor_ie(bss, MBO_IE_VENDOR_TYPE);
445 if (mbo) {
446 int len;
447
448 len = wpas_mbo_supp_op_class_ie(
449 wpa_s, bss->freq,
450 wpa_s->sme.assoc_req_ie + wpa_s->sme.assoc_req_ie_len,
451 sizeof(wpa_s->sme.assoc_req_ie) -
452 wpa_s->sme.assoc_req_ie_len);
453 if (len > 0)
454 wpa_s->sme.assoc_req_ie_len += len;
455 }
456 #endif /* CONFIG_MBO */
457
458 if (params.p2p)
459 wpa_drv_get_ext_capa(wpa_s, WPA_IF_P2P_CLIENT);
460 else
461 wpa_drv_get_ext_capa(wpa_s, WPA_IF_STATION);
462
463 ext_capab_len = wpas_build_ext_capab(wpa_s, ext_capab,
464 sizeof(ext_capab));
465 if (ext_capab_len > 0) {
466 u8 *pos = wpa_s->sme.assoc_req_ie;
467 if (wpa_s->sme.assoc_req_ie_len > 0 && pos[0] == WLAN_EID_RSN)
468 pos += 2 + pos[1];
469 os_memmove(pos + ext_capab_len, pos,
470 wpa_s->sme.assoc_req_ie_len -
471 (pos - wpa_s->sme.assoc_req_ie));
472 wpa_s->sme.assoc_req_ie_len += ext_capab_len;
473 os_memcpy(pos, ext_capab, ext_capab_len);
474 }
475
476 #ifdef CONFIG_HS20
477 if (is_hs20_network(wpa_s, ssid, bss)) {
478 struct wpabuf *hs20;
479
480 hs20 = wpabuf_alloc(20);
481 if (hs20) {
482 int pps_mo_id = hs20_get_pps_mo_id(wpa_s, ssid);
483 size_t len;
484
485 wpas_hs20_add_indication(hs20, pps_mo_id);
486 len = sizeof(wpa_s->sme.assoc_req_ie) -
487 wpa_s->sme.assoc_req_ie_len;
488 if (wpabuf_len(hs20) <= len) {
489 os_memcpy(wpa_s->sme.assoc_req_ie +
490 wpa_s->sme.assoc_req_ie_len,
491 wpabuf_head(hs20), wpabuf_len(hs20));
492 wpa_s->sme.assoc_req_ie_len += wpabuf_len(hs20);
493 }
494 wpabuf_free(hs20);
495 }
496 }
497 #endif /* CONFIG_HS20 */
498
499 if (wpa_s->vendor_elem[VENDOR_ELEM_ASSOC_REQ]) {
500 struct wpabuf *buf = wpa_s->vendor_elem[VENDOR_ELEM_ASSOC_REQ];
501 size_t len;
502
503 len = sizeof(wpa_s->sme.assoc_req_ie) -
504 wpa_s->sme.assoc_req_ie_len;
505 if (wpabuf_len(buf) <= len) {
506 os_memcpy(wpa_s->sme.assoc_req_ie +
507 wpa_s->sme.assoc_req_ie_len,
508 wpabuf_head(buf), wpabuf_len(buf));
509 wpa_s->sme.assoc_req_ie_len += wpabuf_len(buf);
510 }
511 }
512
513 #ifdef CONFIG_MBO
514 if (mbo) {
515 int len;
516
517 len = wpas_mbo_ie(wpa_s, wpa_s->sme.assoc_req_ie +
518 wpa_s->sme.assoc_req_ie_len,
519 sizeof(wpa_s->sme.assoc_req_ie) -
520 wpa_s->sme.assoc_req_ie_len);
521 if (len >= 0)
522 wpa_s->sme.assoc_req_ie_len += len;
523 }
524 #endif /* CONFIG_MBO */
525
526 #ifdef CONFIG_SAE
527 if (!skip_auth && params.auth_alg == WPA_AUTH_ALG_SAE &&
528 pmksa_cache_set_current(wpa_s->wpa, NULL, bss->bssid, ssid, 0) == 0)
529 {
530 wpa_dbg(wpa_s, MSG_DEBUG,
531 "PMKSA cache entry found - try to use PMKSA caching instead of new SAE authentication");
532 params.auth_alg = WPA_AUTH_ALG_OPEN;
533 wpa_s->sme.sae_pmksa_caching = 1;
534 }
535
536 if (!skip_auth && params.auth_alg == WPA_AUTH_ALG_SAE) {
537 if (start)
538 resp = sme_auth_build_sae_commit(wpa_s, ssid,
539 bss->bssid);
540 else
541 resp = sme_auth_build_sae_confirm(wpa_s);
542 if (resp == NULL) {
543 wpas_connection_failed(wpa_s, bss->bssid);
544 return;
545 }
546 params.auth_data = wpabuf_head(resp);
547 params.auth_data_len = wpabuf_len(resp);
548 wpa_s->sme.sae.state = start ? SAE_COMMITTED : SAE_CONFIRMED;
549 }
550 #endif /* CONFIG_SAE */
551
552 old_ssid = wpa_s->current_ssid;
553 wpa_s->current_ssid = ssid;
554 wpa_supplicant_rsn_supp_set_config(wpa_s, wpa_s->current_ssid);
555 wpa_supplicant_initiate_eapol(wpa_s);
556
557 #ifdef CONFIG_FILS
558 /* TODO: FILS operations can in some cases be done between different
559 * network_ctx (i.e., same credentials can be used with multiple
560 * networks). */
561 if (params.auth_alg == WPA_AUTH_ALG_OPEN &&
562 wpa_key_mgmt_fils(ssid->key_mgmt)) {
563 if (pmksa_cache_set_current(wpa_s->wpa, NULL, bss->bssid,
564 ssid, 0) == 0)
565 wpa_printf(MSG_DEBUG,
566 "SME: Try to use FILS with PMKSA caching");
567 resp = fils_build_auth(wpa_s->wpa);
568 if (resp) {
569 params.auth_alg = WPA_AUTH_ALG_FILS;
570 params.auth_data = wpabuf_head(resp);
571 params.auth_data_len = wpabuf_len(resp);
572 wpa_s->sme.auth_alg = WPA_AUTH_ALG_FILS;
573 }
574 }
575 #endif /* CONFIG_FILS */
576
577 wpa_supplicant_cancel_sched_scan(wpa_s);
578 wpa_supplicant_cancel_scan(wpa_s);
579
580 wpa_msg(wpa_s, MSG_INFO, "SME: Trying to authenticate with " MACSTR
581 " (SSID='%s' freq=%d MHz)", MAC2STR(params.bssid),
582 wpa_ssid_txt(params.ssid, params.ssid_len), params.freq);
583
584 wpa_clear_keys(wpa_s, bss->bssid);
585 wpa_supplicant_set_state(wpa_s, WPA_AUTHENTICATING);
586 if (old_ssid != wpa_s->current_ssid)
587 wpas_notify_network_changed(wpa_s);
588
589 #ifdef CONFIG_HS20
590 hs20_configure_frame_filters(wpa_s);
591 #endif /* CONFIG_HS20 */
592
593 #ifdef CONFIG_P2P
594 /*
595 * If multi-channel concurrency is not supported, check for any
596 * frequency conflict. In case of any frequency conflict, remove the
597 * least prioritized connection.
598 */
599 if (wpa_s->num_multichan_concurrent < 2) {
600 int freq, num;
601 num = get_shared_radio_freqs(wpa_s, &freq, 1);
602 if (num > 0 && freq > 0 && freq != params.freq) {
603 wpa_printf(MSG_DEBUG,
604 "Conflicting frequency found (%d != %d)",
605 freq, params.freq);
606 if (wpas_p2p_handle_frequency_conflicts(wpa_s,
607 params.freq,
608 ssid) < 0) {
609 wpas_connection_failed(wpa_s, bss->bssid);
610 wpa_supplicant_mark_disassoc(wpa_s);
611 wpabuf_free(resp);
612 wpas_connect_work_done(wpa_s);
613 return;
614 }
615 }
616 }
617 #endif /* CONFIG_P2P */
618
619 if (skip_auth) {
620 wpa_msg(wpa_s, MSG_DEBUG,
621 "SME: Skip authentication step on reassoc-to-same-BSS");
622 wpabuf_free(resp);
623 sme_associate(wpa_s, ssid->mode, bss->bssid, WLAN_AUTH_OPEN);
624 return;
625 }
626
627
628 wpa_s->sme.auth_alg = params.auth_alg;
629 if (wpa_drv_authenticate(wpa_s, &params) < 0) {
630 wpa_msg(wpa_s, MSG_INFO, "SME: Authentication request to the "
631 "driver failed");
632 wpas_connection_failed(wpa_s, bss->bssid);
633 wpa_supplicant_mark_disassoc(wpa_s);
634 wpabuf_free(resp);
635 wpas_connect_work_done(wpa_s);
636 return;
637 }
638
639 eloop_register_timeout(SME_AUTH_TIMEOUT, 0, sme_auth_timer, wpa_s,
640 NULL);
641
642 /*
643 * Association will be started based on the authentication event from
644 * the driver.
645 */
646
647 wpabuf_free(resp);
648 }
649
650
651 static void sme_auth_start_cb(struct wpa_radio_work *work, int deinit)
652 {
653 struct wpa_connect_work *cwork = work->ctx;
654 struct wpa_supplicant *wpa_s = work->wpa_s;
655
656 if (deinit) {
657 if (work->started)
658 wpa_s->connect_work = NULL;
659
660 wpas_connect_work_free(cwork);
661 return;
662 }
663
664 wpa_s->connect_work = work;
665
666 if (cwork->bss_removed ||
667 !wpas_valid_bss_ssid(wpa_s, cwork->bss, cwork->ssid) ||
668 wpas_network_disabled(wpa_s, cwork->ssid)) {
669 wpa_dbg(wpa_s, MSG_DEBUG, "SME: BSS/SSID entry for authentication not valid anymore - drop connection attempt");
670 wpas_connect_work_done(wpa_s);
671 return;
672 }
673
674 /* Starting new connection, so clear the possibly used WPA IE from the
675 * previous association. */
676 wpa_sm_set_assoc_wpa_ie(wpa_s->wpa, NULL, 0);
677
678 sme_send_authentication(wpa_s, cwork->bss, cwork->ssid, 1);
679 }
680
681
682 void sme_authenticate(struct wpa_supplicant *wpa_s,
683 struct wpa_bss *bss, struct wpa_ssid *ssid)
684 {
685 struct wpa_connect_work *cwork;
686
687 if (bss == NULL || ssid == NULL)
688 return;
689 if (wpa_s->connect_work) {
690 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Reject sme_authenticate() call since connect_work exist");
691 return;
692 }
693
694 if (radio_work_pending(wpa_s, "sme-connect")) {
695 /*
696 * The previous sme-connect work might no longer be valid due to
697 * the fact that the BSS list was updated. In addition, it makes
698 * sense to adhere to the 'newer' decision.
699 */
700 wpa_dbg(wpa_s, MSG_DEBUG,
701 "SME: Remove previous pending sme-connect");
702 radio_remove_works(wpa_s, "sme-connect", 0);
703 }
704
705 wpas_abort_ongoing_scan(wpa_s);
706
707 cwork = os_zalloc(sizeof(*cwork));
708 if (cwork == NULL)
709 return;
710 cwork->bss = bss;
711 cwork->ssid = ssid;
712 cwork->sme = 1;
713
714 #ifdef CONFIG_SAE
715 wpa_s->sme.sae.state = SAE_NOTHING;
716 wpa_s->sme.sae.send_confirm = 0;
717 wpa_s->sme.sae_group_index = 0;
718 #endif /* CONFIG_SAE */
719
720 if (radio_add_work(wpa_s, bss->freq, "sme-connect", 1,
721 sme_auth_start_cb, cwork) < 0)
722 wpas_connect_work_free(cwork);
723 }
724
725
726 #ifdef CONFIG_SAE
727
728 static int sme_sae_auth(struct wpa_supplicant *wpa_s, u16 auth_transaction,
729 u16 status_code, const u8 *data, size_t len)
730 {
731 int *groups;
732
733 wpa_dbg(wpa_s, MSG_DEBUG, "SME: SAE authentication transaction %u "
734 "status code %u", auth_transaction, status_code);
735
736 if (auth_transaction == 1 &&
737 status_code == WLAN_STATUS_ANTI_CLOGGING_TOKEN_REQ &&
738 wpa_s->sme.sae.state == SAE_COMMITTED &&
739 wpa_s->current_bss && wpa_s->current_ssid) {
740 int default_groups[] = { 19, 20, 21, 25, 26, 0 };
741 u16 group;
742
743 groups = wpa_s->conf->sae_groups;
744 if (!groups || groups[0] <= 0)
745 groups = default_groups;
746
747 if (len < sizeof(le16)) {
748 wpa_dbg(wpa_s, MSG_DEBUG,
749 "SME: Too short SAE anti-clogging token request");
750 return -1;
751 }
752 group = WPA_GET_LE16(data);
753 wpa_dbg(wpa_s, MSG_DEBUG,
754 "SME: SAE anti-clogging token requested (group %u)",
755 group);
756 if (sae_group_allowed(&wpa_s->sme.sae, groups, group) !=
757 WLAN_STATUS_SUCCESS) {
758 wpa_dbg(wpa_s, MSG_ERROR,
759 "SME: SAE group %u of anti-clogging request is invalid",
760 group);
761 return -1;
762 }
763 wpabuf_free(wpa_s->sme.sae_token);
764 wpa_s->sme.sae_token = wpabuf_alloc_copy(data + sizeof(le16),
765 len - sizeof(le16));
766 sme_send_authentication(wpa_s, wpa_s->current_bss,
767 wpa_s->current_ssid, 1);
768 return 0;
769 }
770
771 if (auth_transaction == 1 &&
772 status_code == WLAN_STATUS_FINITE_CYCLIC_GROUP_NOT_SUPPORTED &&
773 wpa_s->sme.sae.state == SAE_COMMITTED &&
774 wpa_s->current_bss && wpa_s->current_ssid) {
775 wpa_dbg(wpa_s, MSG_DEBUG, "SME: SAE group not supported");
776 wpa_s->sme.sae_group_index++;
777 if (sme_set_sae_group(wpa_s) < 0)
778 return -1; /* no other groups enabled */
779 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Try next enabled SAE group");
780 sme_send_authentication(wpa_s, wpa_s->current_bss,
781 wpa_s->current_ssid, 1);
782 return 0;
783 }
784
785 if (status_code != WLAN_STATUS_SUCCESS)
786 return -1;
787
788 if (auth_transaction == 1) {
789 u16 res;
790
791 groups = wpa_s->conf->sae_groups;
792
793 wpa_dbg(wpa_s, MSG_DEBUG, "SME SAE commit");
794 if (wpa_s->current_bss == NULL ||
795 wpa_s->current_ssid == NULL)
796 return -1;
797 if (wpa_s->sme.sae.state != SAE_COMMITTED)
798 return -1;
799 if (groups && groups[0] <= 0)
800 groups = NULL;
801 res = sae_parse_commit(&wpa_s->sme.sae, data, len, NULL, NULL,
802 groups);
803 if (res == SAE_SILENTLY_DISCARD) {
804 wpa_printf(MSG_DEBUG,
805 "SAE: Drop commit message due to reflection attack");
806 return 0;
807 }
808 if (res != WLAN_STATUS_SUCCESS)
809 return -1;
810
811 if (sae_process_commit(&wpa_s->sme.sae) < 0) {
812 wpa_printf(MSG_DEBUG, "SAE: Failed to process peer "
813 "commit");
814 return -1;
815 }
816
817 wpabuf_free(wpa_s->sme.sae_token);
818 wpa_s->sme.sae_token = NULL;
819 sme_send_authentication(wpa_s, wpa_s->current_bss,
820 wpa_s->current_ssid, 0);
821 return 0;
822 } else if (auth_transaction == 2) {
823 wpa_dbg(wpa_s, MSG_DEBUG, "SME SAE confirm");
824 if (wpa_s->sme.sae.state != SAE_CONFIRMED)
825 return -1;
826 if (sae_check_confirm(&wpa_s->sme.sae, data, len) < 0)
827 return -1;
828 wpa_s->sme.sae.state = SAE_ACCEPTED;
829 sae_clear_temp_data(&wpa_s->sme.sae);
830 return 1;
831 }
832
833 return -1;
834 }
835 #endif /* CONFIG_SAE */
836
837
838 void sme_event_auth(struct wpa_supplicant *wpa_s, union wpa_event_data *data)
839 {
840 struct wpa_ssid *ssid = wpa_s->current_ssid;
841
842 if (ssid == NULL) {
843 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Ignore authentication event "
844 "when network is not selected");
845 return;
846 }
847
848 if (wpa_s->wpa_state != WPA_AUTHENTICATING) {
849 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Ignore authentication event "
850 "when not in authenticating state");
851 return;
852 }
853
854 if (os_memcmp(wpa_s->pending_bssid, data->auth.peer, ETH_ALEN) != 0) {
855 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Ignore authentication with "
856 "unexpected peer " MACSTR,
857 MAC2STR(data->auth.peer));
858 return;
859 }
860
861 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Authentication response: peer=" MACSTR
862 " auth_type=%d auth_transaction=%d status_code=%d",
863 MAC2STR(data->auth.peer), data->auth.auth_type,
864 data->auth.auth_transaction, data->auth.status_code);
865 wpa_hexdump(MSG_MSGDUMP, "SME: Authentication response IEs",
866 data->auth.ies, data->auth.ies_len);
867
868 eloop_cancel_timeout(sme_auth_timer, wpa_s, NULL);
869
870 #ifdef CONFIG_SAE
871 if (data->auth.auth_type == WLAN_AUTH_SAE) {
872 int res;
873 res = sme_sae_auth(wpa_s, data->auth.auth_transaction,
874 data->auth.status_code, data->auth.ies,
875 data->auth.ies_len);
876 if (res < 0) {
877 wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
878 wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED);
879
880 }
881 if (res != 1)
882 return;
883
884 wpa_printf(MSG_DEBUG, "SME: SAE completed - setting PMK for "
885 "4-way handshake");
886 wpa_sm_set_pmk(wpa_s->wpa, wpa_s->sme.sae.pmk, PMK_LEN,
887 wpa_s->sme.sae.pmkid, wpa_s->pending_bssid);
888 }
889 #endif /* CONFIG_SAE */
890
891 if (data->auth.status_code != WLAN_STATUS_SUCCESS) {
892 char *ie_txt = NULL;
893
894 if (data->auth.ies && data->auth.ies_len) {
895 size_t buflen = 2 * data->auth.ies_len + 1;
896 ie_txt = os_malloc(buflen);
897 if (ie_txt) {
898 wpa_snprintf_hex(ie_txt, buflen, data->auth.ies,
899 data->auth.ies_len);
900 }
901 }
902 wpa_msg(wpa_s, MSG_INFO, WPA_EVENT_AUTH_REJECT MACSTR
903 " auth_type=%u auth_transaction=%u status_code=%u ie=%s",
904 MAC2STR(data->auth.peer), data->auth.auth_type,
905 data->auth.auth_transaction, data->auth.status_code,
906 ie_txt);
907 os_free(ie_txt);
908
909 if (data->auth.status_code !=
910 WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG ||
911 wpa_s->sme.auth_alg == data->auth.auth_type ||
912 wpa_s->current_ssid->auth_alg == WPA_AUTH_ALG_LEAP) {
913 wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
914 wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED);
915 return;
916 }
917
918 wpas_connect_work_done(wpa_s);
919
920 switch (data->auth.auth_type) {
921 case WLAN_AUTH_OPEN:
922 wpa_s->current_ssid->auth_alg = WPA_AUTH_ALG_SHARED;
923
924 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Trying SHARED auth");
925 wpa_supplicant_associate(wpa_s, wpa_s->current_bss,
926 wpa_s->current_ssid);
927 return;
928
929 case WLAN_AUTH_SHARED_KEY:
930 wpa_s->current_ssid->auth_alg = WPA_AUTH_ALG_LEAP;
931
932 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Trying LEAP auth");
933 wpa_supplicant_associate(wpa_s, wpa_s->current_bss,
934 wpa_s->current_ssid);
935 return;
936
937 default:
938 return;
939 }
940 }
941
942 #ifdef CONFIG_IEEE80211R
943 if (data->auth.auth_type == WLAN_AUTH_FT) {
944 if (wpa_ft_process_response(wpa_s->wpa, data->auth.ies,
945 data->auth.ies_len, 0,
946 data->auth.peer, NULL, 0) < 0) {
947 wpa_dbg(wpa_s, MSG_DEBUG,
948 "SME: FT Authentication response processing failed");
949 wpa_msg(wpa_s, MSG_INFO, WPA_EVENT_DISCONNECTED "bssid="
950 MACSTR
951 " reason=%d locally_generated=1",
952 MAC2STR(wpa_s->pending_bssid),
953 WLAN_REASON_DEAUTH_LEAVING);
954 wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
955 wpa_supplicant_mark_disassoc(wpa_s);
956 return;
957 }
958 }
959 #endif /* CONFIG_IEEE80211R */
960
961 sme_associate(wpa_s, ssid->mode, data->auth.peer,
962 data->auth.auth_type);
963 }
964
965
966 void sme_associate(struct wpa_supplicant *wpa_s, enum wpas_mode mode,
967 const u8 *bssid, u16 auth_type)
968 {
969 struct wpa_driver_associate_params params;
970 struct ieee802_11_elems elems;
971 #ifdef CONFIG_HT_OVERRIDES
972 struct ieee80211_ht_capabilities htcaps;
973 struct ieee80211_ht_capabilities htcaps_mask;
974 #endif /* CONFIG_HT_OVERRIDES */
975 #ifdef CONFIG_VHT_OVERRIDES
976 struct ieee80211_vht_capabilities vhtcaps;
977 struct ieee80211_vht_capabilities vhtcaps_mask;
978 #endif /* CONFIG_VHT_OVERRIDES */
979
980 os_memset(&params, 0, sizeof(params));
981 params.bssid = bssid;
982 params.ssid = wpa_s->sme.ssid;
983 params.ssid_len = wpa_s->sme.ssid_len;
984 params.freq.freq = wpa_s->sme.freq;
985 params.bg_scan_period = wpa_s->current_ssid ?
986 wpa_s->current_ssid->bg_scan_period : -1;
987 params.wpa_ie = wpa_s->sme.assoc_req_ie_len ?
988 wpa_s->sme.assoc_req_ie : NULL;
989 params.wpa_ie_len = wpa_s->sme.assoc_req_ie_len;
990 params.pairwise_suite = wpa_s->pairwise_cipher;
991 params.group_suite = wpa_s->group_cipher;
992 params.key_mgmt_suite = wpa_s->key_mgmt;
993 params.wpa_proto = wpa_s->wpa_proto;
994 #ifdef CONFIG_HT_OVERRIDES
995 os_memset(&htcaps, 0, sizeof(htcaps));
996 os_memset(&htcaps_mask, 0, sizeof(htcaps_mask));
997 params.htcaps = (u8 *) &htcaps;
998 params.htcaps_mask = (u8 *) &htcaps_mask;
999 wpa_supplicant_apply_ht_overrides(wpa_s, wpa_s->current_ssid, &params);
1000 #endif /* CONFIG_HT_OVERRIDES */
1001 #ifdef CONFIG_VHT_OVERRIDES
1002 os_memset(&vhtcaps, 0, sizeof(vhtcaps));
1003 os_memset(&vhtcaps_mask, 0, sizeof(vhtcaps_mask));
1004 params.vhtcaps = &vhtcaps;
1005 params.vhtcaps_mask = &vhtcaps_mask;
1006 wpa_supplicant_apply_vht_overrides(wpa_s, wpa_s->current_ssid, &params);
1007 #endif /* CONFIG_VHT_OVERRIDES */
1008 #ifdef CONFIG_IEEE80211R
1009 if (auth_type == WLAN_AUTH_FT && wpa_s->sme.ft_ies) {
1010 params.wpa_ie = wpa_s->sme.ft_ies;
1011 params.wpa_ie_len = wpa_s->sme.ft_ies_len;
1012 }
1013 #endif /* CONFIG_IEEE80211R */
1014 params.mode = mode;
1015 params.mgmt_frame_protection = wpa_s->sme.mfp;
1016 params.rrm_used = wpa_s->rrm.rrm_used;
1017 if (wpa_s->sme.prev_bssid_set)
1018 params.prev_bssid = wpa_s->sme.prev_bssid;
1019
1020 wpa_msg(wpa_s, MSG_INFO, "Trying to associate with " MACSTR
1021 " (SSID='%s' freq=%d MHz)", MAC2STR(params.bssid),
1022 params.ssid ? wpa_ssid_txt(params.ssid, params.ssid_len) : "",
1023 params.freq.freq);
1024
1025 wpa_supplicant_set_state(wpa_s, WPA_ASSOCIATING);
1026
1027 if (params.wpa_ie == NULL ||
1028 ieee802_11_parse_elems(params.wpa_ie, params.wpa_ie_len, &elems, 0)
1029 < 0) {
1030 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Could not parse own IEs?!");
1031 os_memset(&elems, 0, sizeof(elems));
1032 }
1033 if (elems.rsn_ie) {
1034 params.wpa_proto = WPA_PROTO_RSN;
1035 wpa_sm_set_assoc_wpa_ie(wpa_s->wpa, elems.rsn_ie - 2,
1036 elems.rsn_ie_len + 2);
1037 } else if (elems.wpa_ie) {
1038 params.wpa_proto = WPA_PROTO_WPA;
1039 wpa_sm_set_assoc_wpa_ie(wpa_s->wpa, elems.wpa_ie - 2,
1040 elems.wpa_ie_len + 2);
1041 } else if (elems.osen) {
1042 params.wpa_proto = WPA_PROTO_OSEN;
1043 wpa_sm_set_assoc_wpa_ie(wpa_s->wpa, elems.osen - 2,
1044 elems.osen_len + 2);
1045 } else
1046 wpa_sm_set_assoc_wpa_ie(wpa_s->wpa, NULL, 0);
1047 if (wpa_s->current_ssid && wpa_s->current_ssid->p2p_group)
1048 params.p2p = 1;
1049
1050 if (wpa_s->p2pdev->set_sta_uapsd)
1051 params.uapsd = wpa_s->p2pdev->sta_uapsd;
1052 else
1053 params.uapsd = -1;
1054
1055 if (wpa_drv_associate(wpa_s, &params) < 0) {
1056 wpa_msg(wpa_s, MSG_INFO, "SME: Association request to the "
1057 "driver failed");
1058 wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
1059 wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED);
1060 os_memset(wpa_s->pending_bssid, 0, ETH_ALEN);
1061 return;
1062 }
1063
1064 eloop_register_timeout(SME_ASSOC_TIMEOUT, 0, sme_assoc_timer, wpa_s,
1065 NULL);
1066 }
1067
1068
1069 int sme_update_ft_ies(struct wpa_supplicant *wpa_s, const u8 *md,
1070 const u8 *ies, size_t ies_len)
1071 {
1072 if (md == NULL || ies == NULL) {
1073 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Remove mobility domain");
1074 os_free(wpa_s->sme.ft_ies);
1075 wpa_s->sme.ft_ies = NULL;
1076 wpa_s->sme.ft_ies_len = 0;
1077 wpa_s->sme.ft_used = 0;
1078 return 0;
1079 }
1080
1081 os_memcpy(wpa_s->sme.mobility_domain, md, MOBILITY_DOMAIN_ID_LEN);
1082 wpa_hexdump(MSG_DEBUG, "SME: FT IEs", ies, ies_len);
1083 os_free(wpa_s->sme.ft_ies);
1084 wpa_s->sme.ft_ies = os_malloc(ies_len);
1085 if (wpa_s->sme.ft_ies == NULL)
1086 return -1;
1087 os_memcpy(wpa_s->sme.ft_ies, ies, ies_len);
1088 wpa_s->sme.ft_ies_len = ies_len;
1089 return 0;
1090 }
1091
1092
1093 static void sme_deauth(struct wpa_supplicant *wpa_s)
1094 {
1095 int bssid_changed;
1096
1097 bssid_changed = !is_zero_ether_addr(wpa_s->bssid);
1098
1099 if (wpa_drv_deauthenticate(wpa_s, wpa_s->pending_bssid,
1100 WLAN_REASON_DEAUTH_LEAVING) < 0) {
1101 wpa_msg(wpa_s, MSG_INFO, "SME: Deauth request to the driver "
1102 "failed");
1103 }
1104 wpa_s->sme.prev_bssid_set = 0;
1105
1106 wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
1107 wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED);
1108 os_memset(wpa_s->bssid, 0, ETH_ALEN);
1109 os_memset(wpa_s->pending_bssid, 0, ETH_ALEN);
1110 if (bssid_changed)
1111 wpas_notify_bssid_changed(wpa_s);
1112 }
1113
1114
1115 void sme_event_assoc_reject(struct wpa_supplicant *wpa_s,
1116 union wpa_event_data *data)
1117 {
1118 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Association with " MACSTR " failed: "
1119 "status code %d", MAC2STR(wpa_s->pending_bssid),
1120 data->assoc_reject.status_code);
1121
1122 eloop_cancel_timeout(sme_assoc_timer, wpa_s, NULL);
1123
1124 #ifdef CONFIG_SAE
1125 if (wpa_s->sme.sae_pmksa_caching && wpa_s->current_ssid &&
1126 wpa_key_mgmt_sae(wpa_s->current_ssid->key_mgmt)) {
1127 wpa_dbg(wpa_s, MSG_DEBUG,
1128 "PMKSA caching attempt rejected - drop PMKSA cache entry and fall back to SAE authentication");
1129 wpa_sm_aborted_cached(wpa_s->wpa);
1130 wpa_sm_pmksa_cache_flush(wpa_s->wpa, wpa_s->current_ssid);
1131 if (wpa_s->current_bss) {
1132 struct wpa_bss *bss = wpa_s->current_bss;
1133 struct wpa_ssid *ssid = wpa_s->current_ssid;
1134
1135 wpa_drv_deauthenticate(wpa_s, wpa_s->pending_bssid,
1136 WLAN_REASON_DEAUTH_LEAVING);
1137 wpas_connect_work_done(wpa_s);
1138 wpa_supplicant_mark_disassoc(wpa_s);
1139 wpa_supplicant_connect(wpa_s, bss, ssid);
1140 return;
1141 }
1142 }
1143 #endif /* CONFIG_SAE */
1144
1145 /*
1146 * For now, unconditionally terminate the previous authentication. In
1147 * theory, this should not be needed, but mac80211 gets quite confused
1148 * if the authentication is left pending.. Some roaming cases might
1149 * benefit from using the previous authentication, so this could be
1150 * optimized in the future.
1151 */
1152 sme_deauth(wpa_s);
1153 }
1154
1155
1156 void sme_event_auth_timed_out(struct wpa_supplicant *wpa_s,
1157 union wpa_event_data *data)
1158 {
1159 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Authentication timed out");
1160 wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
1161 wpa_supplicant_mark_disassoc(wpa_s);
1162 }
1163
1164
1165 void sme_event_assoc_timed_out(struct wpa_supplicant *wpa_s,
1166 union wpa_event_data *data)
1167 {
1168 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Association timed out");
1169 wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
1170 wpa_supplicant_mark_disassoc(wpa_s);
1171 }
1172
1173
1174 void sme_event_disassoc(struct wpa_supplicant *wpa_s,
1175 struct disassoc_info *info)
1176 {
1177 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Disassociation event received");
1178 if (wpa_s->sme.prev_bssid_set) {
1179 /*
1180 * cfg80211/mac80211 can get into somewhat confused state if
1181 * the AP only disassociates us and leaves us in authenticated
1182 * state. For now, force the state to be cleared to avoid
1183 * confusing errors if we try to associate with the AP again.
1184 */
1185 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Deauthenticate to clear "
1186 "driver state");
1187 wpa_drv_deauthenticate(wpa_s, wpa_s->sme.prev_bssid,
1188 WLAN_REASON_DEAUTH_LEAVING);
1189 }
1190 }
1191
1192
1193 static void sme_auth_timer(void *eloop_ctx, void *timeout_ctx)
1194 {
1195 struct wpa_supplicant *wpa_s = eloop_ctx;
1196 if (wpa_s->wpa_state == WPA_AUTHENTICATING) {
1197 wpa_msg(wpa_s, MSG_DEBUG, "SME: Authentication timeout");
1198 sme_deauth(wpa_s);
1199 }
1200 }
1201
1202
1203 static void sme_assoc_timer(void *eloop_ctx, void *timeout_ctx)
1204 {
1205 struct wpa_supplicant *wpa_s = eloop_ctx;
1206 if (wpa_s->wpa_state == WPA_ASSOCIATING) {
1207 wpa_msg(wpa_s, MSG_DEBUG, "SME: Association timeout");
1208 sme_deauth(wpa_s);
1209 }
1210 }
1211
1212
1213 void sme_state_changed(struct wpa_supplicant *wpa_s)
1214 {
1215 /* Make sure timers are cleaned up appropriately. */
1216 if (wpa_s->wpa_state != WPA_ASSOCIATING)
1217 eloop_cancel_timeout(sme_assoc_timer, wpa_s, NULL);
1218 if (wpa_s->wpa_state != WPA_AUTHENTICATING)
1219 eloop_cancel_timeout(sme_auth_timer, wpa_s, NULL);
1220 }
1221
1222
1223 void sme_disassoc_while_authenticating(struct wpa_supplicant *wpa_s,
1224 const u8 *prev_pending_bssid)
1225 {
1226 /*
1227 * mac80211-workaround to force deauth on failed auth cmd,
1228 * requires us to remain in authenticating state to allow the
1229 * second authentication attempt to be continued properly.
1230 */
1231 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Allow pending authentication "
1232 "to proceed after disconnection event");
1233 wpa_supplicant_set_state(wpa_s, WPA_AUTHENTICATING);
1234 os_memcpy(wpa_s->pending_bssid, prev_pending_bssid, ETH_ALEN);
1235
1236 /*
1237 * Re-arm authentication timer in case auth fails for whatever reason.
1238 */
1239 eloop_cancel_timeout(sme_auth_timer, wpa_s, NULL);
1240 eloop_register_timeout(SME_AUTH_TIMEOUT, 0, sme_auth_timer, wpa_s,
1241 NULL);
1242 }
1243
1244
1245 void sme_clear_on_disassoc(struct wpa_supplicant *wpa_s)
1246 {
1247 wpa_s->sme.prev_bssid_set = 0;
1248 #ifdef CONFIG_SAE
1249 wpabuf_free(wpa_s->sme.sae_token);
1250 wpa_s->sme.sae_token = NULL;
1251 sae_clear_data(&wpa_s->sme.sae);
1252 #endif /* CONFIG_SAE */
1253 #ifdef CONFIG_IEEE80211R
1254 if (wpa_s->sme.ft_ies)
1255 sme_update_ft_ies(wpa_s, NULL, NULL, 0);
1256 #endif /* CONFIG_IEEE80211R */
1257 }
1258
1259
1260 void sme_deinit(struct wpa_supplicant *wpa_s)
1261 {
1262 os_free(wpa_s->sme.ft_ies);
1263 wpa_s->sme.ft_ies = NULL;
1264 wpa_s->sme.ft_ies_len = 0;
1265 #ifdef CONFIG_IEEE80211W
1266 sme_stop_sa_query(wpa_s);
1267 #endif /* CONFIG_IEEE80211W */
1268 sme_clear_on_disassoc(wpa_s);
1269
1270 eloop_cancel_timeout(sme_assoc_timer, wpa_s, NULL);
1271 eloop_cancel_timeout(sme_auth_timer, wpa_s, NULL);
1272 eloop_cancel_timeout(sme_obss_scan_timeout, wpa_s, NULL);
1273 }
1274
1275
1276 static void sme_send_2040_bss_coex(struct wpa_supplicant *wpa_s,
1277 const u8 *chan_list, u8 num_channels,
1278 u8 num_intol)
1279 {
1280 struct ieee80211_2040_bss_coex_ie *bc_ie;
1281 struct ieee80211_2040_intol_chan_report *ic_report;
1282 struct wpabuf *buf;
1283
1284 wpa_printf(MSG_DEBUG, "SME: Send 20/40 BSS Coexistence to " MACSTR
1285 " (num_channels=%u num_intol=%u)",
1286 MAC2STR(wpa_s->bssid), num_channels, num_intol);
1287 wpa_hexdump(MSG_DEBUG, "SME: 20/40 BSS Intolerant Channels",
1288 chan_list, num_channels);
1289
1290 buf = wpabuf_alloc(2 + /* action.category + action_code */
1291 sizeof(struct ieee80211_2040_bss_coex_ie) +
1292 sizeof(struct ieee80211_2040_intol_chan_report) +
1293 num_channels);
1294 if (buf == NULL)
1295 return;
1296
1297 wpabuf_put_u8(buf, WLAN_ACTION_PUBLIC);
1298 wpabuf_put_u8(buf, WLAN_PA_20_40_BSS_COEX);
1299
1300 bc_ie = wpabuf_put(buf, sizeof(*bc_ie));
1301 bc_ie->element_id = WLAN_EID_20_40_BSS_COEXISTENCE;
1302 bc_ie->length = 1;
1303 if (num_intol)
1304 bc_ie->coex_param |= WLAN_20_40_BSS_COEX_20MHZ_WIDTH_REQ;
1305
1306 if (num_channels > 0) {
1307 ic_report = wpabuf_put(buf, sizeof(*ic_report));
1308 ic_report->element_id = WLAN_EID_20_40_BSS_INTOLERANT;
1309 ic_report->length = num_channels + 1;
1310 ic_report->op_class = 0;
1311 os_memcpy(wpabuf_put(buf, num_channels), chan_list,
1312 num_channels);
1313 }
1314
1315 if (wpa_drv_send_action(wpa_s, wpa_s->assoc_freq, 0, wpa_s->bssid,
1316 wpa_s->own_addr, wpa_s->bssid,
1317 wpabuf_head(buf), wpabuf_len(buf), 0) < 0) {
1318 wpa_msg(wpa_s, MSG_INFO,
1319 "SME: Failed to send 20/40 BSS Coexistence frame");
1320 }
1321
1322 wpabuf_free(buf);
1323 }
1324
1325
1326 int sme_proc_obss_scan(struct wpa_supplicant *wpa_s)
1327 {
1328 struct wpa_bss *bss;
1329 const u8 *ie;
1330 u16 ht_cap;
1331 u8 chan_list[P2P_MAX_CHANNELS], channel;
1332 u8 num_channels = 0, num_intol = 0, i;
1333
1334 if (!wpa_s->sme.sched_obss_scan)
1335 return 0;
1336
1337 wpa_s->sme.sched_obss_scan = 0;
1338 if (!wpa_s->current_bss || wpa_s->wpa_state != WPA_COMPLETED)
1339 return 1;
1340
1341 /*
1342 * Check whether AP uses regulatory triplet or channel triplet in
1343 * country info. Right now the operating class of the BSS channel
1344 * width trigger event is "unknown" (IEEE Std 802.11-2012 10.15.12),
1345 * based on the assumption that operating class triplet is not used in
1346 * beacon frame. If the First Channel Number/Operating Extension
1347 * Identifier octet has a positive integer value of 201 or greater,
1348 * then its operating class triplet.
1349 *
1350 * TODO: If Supported Operating Classes element is present in beacon
1351 * frame, have to lookup operating class in Annex E and fill them in
1352 * 2040 coex frame.
1353 */
1354 ie = wpa_bss_get_ie(wpa_s->current_bss, WLAN_EID_COUNTRY);
1355 if (ie && (ie[1] >= 6) && (ie[5] >= 201))
1356 return 1;
1357
1358 os_memset(chan_list, 0, sizeof(chan_list));
1359
1360 dl_list_for_each(bss, &wpa_s->bss, struct wpa_bss, list) {
1361 /* Skip other band bss */
1362 enum hostapd_hw_mode mode;
1363 mode = ieee80211_freq_to_chan(bss->freq, &channel);
1364 if (mode != HOSTAPD_MODE_IEEE80211G &&
1365 mode != HOSTAPD_MODE_IEEE80211B)
1366 continue;
1367
1368 ie = wpa_bss_get_ie(bss, WLAN_EID_HT_CAP);
1369 ht_cap = (ie && (ie[1] == 26)) ? WPA_GET_LE16(ie + 2) : 0;
1370 wpa_printf(MSG_DEBUG, "SME OBSS scan BSS " MACSTR
1371 " freq=%u chan=%u ht_cap=0x%x",
1372 MAC2STR(bss->bssid), bss->freq, channel, ht_cap);
1373
1374 if (!ht_cap || (ht_cap & HT_CAP_INFO_40MHZ_INTOLERANT)) {
1375 if (ht_cap & HT_CAP_INFO_40MHZ_INTOLERANT)
1376 num_intol++;
1377
1378 /* Check whether the channel is already considered */
1379 for (i = 0; i < num_channels; i++) {
1380 if (channel == chan_list[i])
1381 break;
1382 }
1383 if (i != num_channels)
1384 continue;
1385
1386 chan_list[num_channels++] = channel;
1387 }
1388 }
1389
1390 sme_send_2040_bss_coex(wpa_s, chan_list, num_channels, num_intol);
1391 return 1;
1392 }
1393
1394
1395 static void wpa_obss_scan_freqs_list(struct wpa_supplicant *wpa_s,
1396 struct wpa_driver_scan_params *params)
1397 {
1398 /* Include only affected channels */
1399 struct hostapd_hw_modes *mode;
1400 int count, i;
1401 int start, end;
1402
1403 mode = get_mode(wpa_s->hw.modes, wpa_s->hw.num_modes,
1404 HOSTAPD_MODE_IEEE80211G);
1405 if (mode == NULL) {
1406 /* No channels supported in this band - use empty list */
1407 params->freqs = os_zalloc(sizeof(int));
1408 return;
1409 }
1410
1411 if (wpa_s->sme.ht_sec_chan == HT_SEC_CHAN_UNKNOWN &&
1412 wpa_s->current_bss) {
1413 const u8 *ie;
1414
1415 ie = wpa_bss_get_ie(wpa_s->current_bss, WLAN_EID_HT_OPERATION);
1416 if (ie && ie[1] >= 2) {
1417 u8 o;
1418
1419 o = ie[3] & HT_INFO_HT_PARAM_SECONDARY_CHNL_OFF_MASK;
1420 if (o == HT_INFO_HT_PARAM_SECONDARY_CHNL_ABOVE)
1421 wpa_s->sme.ht_sec_chan = HT_SEC_CHAN_ABOVE;
1422 else if (o == HT_INFO_HT_PARAM_SECONDARY_CHNL_BELOW)
1423 wpa_s->sme.ht_sec_chan = HT_SEC_CHAN_BELOW;
1424 }
1425 }
1426
1427 start = wpa_s->assoc_freq - 10;
1428 end = wpa_s->assoc_freq + 10;
1429 switch (wpa_s->sme.ht_sec_chan) {
1430 case HT_SEC_CHAN_UNKNOWN:
1431 /* HT40+ possible on channels 1..9 */
1432 if (wpa_s->assoc_freq <= 2452)
1433 start -= 20;
1434 /* HT40- possible on channels 5-13 */
1435 if (wpa_s->assoc_freq >= 2432)
1436 end += 20;
1437 break;
1438 case HT_SEC_CHAN_ABOVE:
1439 end += 20;
1440 break;
1441 case HT_SEC_CHAN_BELOW:
1442 start -= 20;
1443 break;
1444 }
1445 wpa_printf(MSG_DEBUG,
1446 "OBSS: assoc_freq %d possible affected range %d-%d",
1447 wpa_s->assoc_freq, start, end);
1448
1449 params->freqs = os_calloc(mode->num_channels + 1, sizeof(int));
1450 if (params->freqs == NULL)
1451 return;
1452 for (count = 0, i = 0; i < mode->num_channels; i++) {
1453 int freq;
1454
1455 if (mode->channels[i].flag & HOSTAPD_CHAN_DISABLED)
1456 continue;
1457 freq = mode->channels[i].freq;
1458 if (freq - 10 >= end || freq + 10 <= start)
1459 continue; /* not affected */
1460 params->freqs[count++] = freq;
1461 }
1462 }
1463
1464
1465 static void sme_obss_scan_timeout(void *eloop_ctx, void *timeout_ctx)
1466 {
1467 struct wpa_supplicant *wpa_s = eloop_ctx;
1468 struct wpa_driver_scan_params params;
1469
1470 if (!wpa_s->current_bss) {
1471 wpa_printf(MSG_DEBUG, "SME OBSS: Ignore scan request");
1472 return;
1473 }
1474
1475 os_memset(&params, 0, sizeof(params));
1476 wpa_obss_scan_freqs_list(wpa_s, &params);
1477 params.low_priority = 1;
1478 wpa_printf(MSG_DEBUG, "SME OBSS: Request an OBSS scan");
1479
1480 if (wpa_supplicant_trigger_scan(wpa_s, &params))
1481 wpa_printf(MSG_DEBUG, "SME OBSS: Failed to trigger scan");
1482 else
1483 wpa_s->sme.sched_obss_scan = 1;
1484 os_free(params.freqs);
1485
1486 eloop_register_timeout(wpa_s->sme.obss_scan_int, 0,
1487 sme_obss_scan_timeout, wpa_s, NULL);
1488 }
1489
1490
1491 void sme_sched_obss_scan(struct wpa_supplicant *wpa_s, int enable)
1492 {
1493 const u8 *ie;
1494 struct wpa_bss *bss = wpa_s->current_bss;
1495 struct wpa_ssid *ssid = wpa_s->current_ssid;
1496 struct hostapd_hw_modes *hw_mode = NULL;
1497 int i;
1498
1499 eloop_cancel_timeout(sme_obss_scan_timeout, wpa_s, NULL);
1500 wpa_s->sme.sched_obss_scan = 0;
1501 wpa_s->sme.ht_sec_chan = HT_SEC_CHAN_UNKNOWN;
1502 if (!enable)
1503 return;
1504
1505 /*
1506 * Schedule OBSS scan if driver is using station SME in wpa_supplicant
1507 * or it expects OBSS scan to be performed by wpa_supplicant.
1508 */
1509 if (!((wpa_s->drv_flags & WPA_DRIVER_FLAGS_SME) ||
1510 (wpa_s->drv_flags & WPA_DRIVER_FLAGS_OBSS_SCAN)) ||
1511 ssid == NULL || ssid->mode != IEEE80211_MODE_INFRA)
1512 return;
1513
1514 if (!wpa_s->hw.modes)
1515 return;
1516
1517 /* only HT caps in 11g mode are relevant */
1518 for (i = 0; i < wpa_s->hw.num_modes; i++) {
1519 hw_mode = &wpa_s->hw.modes[i];
1520 if (hw_mode->mode == HOSTAPD_MODE_IEEE80211G)
1521 break;
1522 }
1523
1524 /* Driver does not support HT40 for 11g or doesn't have 11g. */
1525 if (i == wpa_s->hw.num_modes || !hw_mode ||
1526 !(hw_mode->ht_capab & HT_CAP_INFO_SUPP_CHANNEL_WIDTH_SET))
1527 return;
1528
1529 if (bss == NULL || bss->freq < 2400 || bss->freq > 2500)
1530 return; /* Not associated on 2.4 GHz band */
1531
1532 /* Check whether AP supports HT40 */
1533 ie = wpa_bss_get_ie(wpa_s->current_bss, WLAN_EID_HT_CAP);
1534 if (!ie || ie[1] < 2 ||
1535 !(WPA_GET_LE16(ie + 2) & HT_CAP_INFO_SUPP_CHANNEL_WIDTH_SET))
1536 return; /* AP does not support HT40 */
1537
1538 ie = wpa_bss_get_ie(wpa_s->current_bss,
1539 WLAN_EID_OVERLAPPING_BSS_SCAN_PARAMS);
1540 if (!ie || ie[1] < 14)
1541 return; /* AP does not request OBSS scans */
1542
1543 wpa_s->sme.obss_scan_int = WPA_GET_LE16(ie + 6);
1544 if (wpa_s->sme.obss_scan_int < 10) {
1545 wpa_printf(MSG_DEBUG, "SME: Invalid OBSS Scan Interval %u "
1546 "replaced with the minimum 10 sec",
1547 wpa_s->sme.obss_scan_int);
1548 wpa_s->sme.obss_scan_int = 10;
1549 }
1550 wpa_printf(MSG_DEBUG, "SME: OBSS Scan Interval %u sec",
1551 wpa_s->sme.obss_scan_int);
1552 eloop_register_timeout(wpa_s->sme.obss_scan_int, 0,
1553 sme_obss_scan_timeout, wpa_s, NULL);
1554 }
1555
1556
1557 #ifdef CONFIG_IEEE80211W
1558
1559 static const unsigned int sa_query_max_timeout = 1000;
1560 static const unsigned int sa_query_retry_timeout = 201;
1561
1562 static int sme_check_sa_query_timeout(struct wpa_supplicant *wpa_s)
1563 {
1564 u32 tu;
1565 struct os_reltime now, passed;
1566 os_get_reltime(&now);
1567 os_reltime_sub(&now, &wpa_s->sme.sa_query_start, &passed);
1568 tu = (passed.sec * 1000000 + passed.usec) / 1024;
1569 if (sa_query_max_timeout < tu) {
1570 wpa_dbg(wpa_s, MSG_DEBUG, "SME: SA Query timed out");
1571 sme_stop_sa_query(wpa_s);
1572 wpa_supplicant_deauthenticate(
1573 wpa_s, WLAN_REASON_PREV_AUTH_NOT_VALID);
1574 return 1;
1575 }
1576
1577 return 0;
1578 }
1579
1580
1581 static void sme_send_sa_query_req(struct wpa_supplicant *wpa_s,
1582 const u8 *trans_id)
1583 {
1584 u8 req[2 + WLAN_SA_QUERY_TR_ID_LEN];
1585 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Sending SA Query Request to "
1586 MACSTR, MAC2STR(wpa_s->bssid));
1587 wpa_hexdump(MSG_DEBUG, "SME: SA Query Transaction ID",
1588 trans_id, WLAN_SA_QUERY_TR_ID_LEN);
1589 req[0] = WLAN_ACTION_SA_QUERY;
1590 req[1] = WLAN_SA_QUERY_REQUEST;
1591 os_memcpy(req + 2, trans_id, WLAN_SA_QUERY_TR_ID_LEN);
1592 if (wpa_drv_send_action(wpa_s, wpa_s->assoc_freq, 0, wpa_s->bssid,
1593 wpa_s->own_addr, wpa_s->bssid,
1594 req, sizeof(req), 0) < 0)
1595 wpa_msg(wpa_s, MSG_INFO, "SME: Failed to send SA Query "
1596 "Request");
1597 }
1598
1599
1600 static void sme_sa_query_timer(void *eloop_ctx, void *timeout_ctx)
1601 {
1602 struct wpa_supplicant *wpa_s = eloop_ctx;
1603 unsigned int timeout, sec, usec;
1604 u8 *trans_id, *nbuf;
1605
1606 if (wpa_s->sme.sa_query_count > 0 &&
1607 sme_check_sa_query_timeout(wpa_s))
1608 return;
1609
1610 nbuf = os_realloc_array(wpa_s->sme.sa_query_trans_id,
1611 wpa_s->sme.sa_query_count + 1,
1612 WLAN_SA_QUERY_TR_ID_LEN);
1613 if (nbuf == NULL) {
1614 sme_stop_sa_query(wpa_s);
1615 return;
1616 }
1617 if (wpa_s->sme.sa_query_count == 0) {
1618 /* Starting a new SA Query procedure */
1619 os_get_reltime(&wpa_s->sme.sa_query_start);
1620 }
1621 trans_id = nbuf + wpa_s->sme.sa_query_count * WLAN_SA_QUERY_TR_ID_LEN;
1622 wpa_s->sme.sa_query_trans_id = nbuf;
1623 wpa_s->sme.sa_query_count++;
1624
1625 if (os_get_random(trans_id, WLAN_SA_QUERY_TR_ID_LEN) < 0) {
1626 wpa_printf(MSG_DEBUG, "Could not generate SA Query ID");
1627 sme_stop_sa_query(wpa_s);
1628 return;
1629 }
1630
1631 timeout = sa_query_retry_timeout;
1632 sec = ((timeout / 1000) * 1024) / 1000;
1633 usec = (timeout % 1000) * 1024;
1634 eloop_register_timeout(sec, usec, sme_sa_query_timer, wpa_s, NULL);
1635
1636 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Association SA Query attempt %d",
1637 wpa_s->sme.sa_query_count);
1638
1639 sme_send_sa_query_req(wpa_s, trans_id);
1640 }
1641
1642
1643 static void sme_start_sa_query(struct wpa_supplicant *wpa_s)
1644 {
1645 sme_sa_query_timer(wpa_s, NULL);
1646 }
1647
1648
1649 static void sme_stop_sa_query(struct wpa_supplicant *wpa_s)
1650 {
1651 eloop_cancel_timeout(sme_sa_query_timer, wpa_s, NULL);
1652 os_free(wpa_s->sme.sa_query_trans_id);
1653 wpa_s->sme.sa_query_trans_id = NULL;
1654 wpa_s->sme.sa_query_count = 0;
1655 }
1656
1657
1658 void sme_event_unprot_disconnect(struct wpa_supplicant *wpa_s, const u8 *sa,
1659 const u8 *da, u16 reason_code)
1660 {
1661 struct wpa_ssid *ssid;
1662 struct os_reltime now;
1663
1664 if (wpa_s->wpa_state != WPA_COMPLETED)
1665 return;
1666 ssid = wpa_s->current_ssid;
1667 if (wpas_get_ssid_pmf(wpa_s, ssid) == NO_MGMT_FRAME_PROTECTION)
1668 return;
1669 if (os_memcmp(sa, wpa_s->bssid, ETH_ALEN) != 0)
1670 return;
1671 if (reason_code != WLAN_REASON_CLASS2_FRAME_FROM_NONAUTH_STA &&
1672 reason_code != WLAN_REASON_CLASS3_FRAME_FROM_NONASSOC_STA)
1673 return;
1674 if (wpa_s->sme.sa_query_count > 0)
1675 return;
1676
1677 os_get_reltime(&now);
1678 if (wpa_s->sme.last_unprot_disconnect.sec &&
1679 !os_reltime_expired(&now, &wpa_s->sme.last_unprot_disconnect, 10))
1680 return; /* limit SA Query procedure frequency */
1681 wpa_s->sme.last_unprot_disconnect = now;
1682
1683 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Unprotected disconnect dropped - "
1684 "possible AP/STA state mismatch - trigger SA Query");
1685 sme_start_sa_query(wpa_s);
1686 }
1687
1688
1689 void sme_sa_query_rx(struct wpa_supplicant *wpa_s, const u8 *sa,
1690 const u8 *data, size_t len)
1691 {
1692 int i;
1693
1694 if (wpa_s->sme.sa_query_trans_id == NULL ||
1695 len < 1 + WLAN_SA_QUERY_TR_ID_LEN ||
1696 data[0] != WLAN_SA_QUERY_RESPONSE)
1697 return;
1698 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Received SA Query response from "
1699 MACSTR " (trans_id %02x%02x)", MAC2STR(sa), data[1], data[2]);
1700
1701 if (os_memcmp(sa, wpa_s->bssid, ETH_ALEN) != 0)
1702 return;
1703
1704 for (i = 0; i < wpa_s->sme.sa_query_count; i++) {
1705 if (os_memcmp(wpa_s->sme.sa_query_trans_id +
1706 i * WLAN_SA_QUERY_TR_ID_LEN,
1707 data + 1, WLAN_SA_QUERY_TR_ID_LEN) == 0)
1708 break;
1709 }
1710
1711 if (i >= wpa_s->sme.sa_query_count) {
1712 wpa_dbg(wpa_s, MSG_DEBUG, "SME: No matching SA Query "
1713 "transaction identifier found");
1714 return;
1715 }
1716
1717 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Reply to pending SA Query received "
1718 "from " MACSTR, MAC2STR(sa));
1719 sme_stop_sa_query(wpa_s);
1720 }
1721
1722 #endif /* CONFIG_IEEE80211W */
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