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