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Add optional reassoc-to-same-BSS optimization
[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_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
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(&params, 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, &params) < 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
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
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
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 groups = wpa_s->conf->sae_groups;
702
703 wpa_dbg(wpa_s, MSG_DEBUG, "SME SAE commit");
704 if (wpa_s->current_bss == NULL ||
705 wpa_s->current_ssid == NULL)
706 return -1;
707 if (wpa_s->sme.sae.state != SAE_COMMITTED)
708 return -1;
709 if (groups && groups[0] <= 0)
710 groups = NULL;
711 if (sae_parse_commit(&wpa_s->sme.sae, data, len, NULL, NULL,
712 groups) != WLAN_STATUS_SUCCESS)
713 return -1;
714
715 if (sae_process_commit(&wpa_s->sme.sae) < 0) {
716 wpa_printf(MSG_DEBUG, "SAE: Failed to process peer "
717 "commit");
718 return -1;
719 }
720
721 wpabuf_free(wpa_s->sme.sae_token);
722 wpa_s->sme.sae_token = NULL;
723 sme_send_authentication(wpa_s, wpa_s->current_bss,
724 wpa_s->current_ssid, 0);
725 return 0;
726 } else if (auth_transaction == 2) {
727 wpa_dbg(wpa_s, MSG_DEBUG, "SME SAE confirm");
728 if (wpa_s->sme.sae.state != SAE_CONFIRMED)
729 return -1;
730 if (sae_check_confirm(&wpa_s->sme.sae, data, len) < 0)
731 return -1;
732 wpa_s->sme.sae.state = SAE_ACCEPTED;
733 sae_clear_temp_data(&wpa_s->sme.sae);
734 return 1;
735 }
736
737 return -1;
738 }
739 #endif /* CONFIG_SAE */
740
741
742 void sme_event_auth(struct wpa_supplicant *wpa_s, union wpa_event_data *data)
743 {
744 struct wpa_ssid *ssid = wpa_s->current_ssid;
745
746 if (ssid == NULL) {
747 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Ignore authentication event "
748 "when network is not selected");
749 return;
750 }
751
752 if (wpa_s->wpa_state != WPA_AUTHENTICATING) {
753 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Ignore authentication event "
754 "when not in authenticating state");
755 return;
756 }
757
758 if (os_memcmp(wpa_s->pending_bssid, data->auth.peer, ETH_ALEN) != 0) {
759 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Ignore authentication with "
760 "unexpected peer " MACSTR,
761 MAC2STR(data->auth.peer));
762 return;
763 }
764
765 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Authentication response: peer=" MACSTR
766 " auth_type=%d auth_transaction=%d status_code=%d",
767 MAC2STR(data->auth.peer), data->auth.auth_type,
768 data->auth.auth_transaction, data->auth.status_code);
769 wpa_hexdump(MSG_MSGDUMP, "SME: Authentication response IEs",
770 data->auth.ies, data->auth.ies_len);
771
772 eloop_cancel_timeout(sme_auth_timer, wpa_s, NULL);
773
774 #ifdef CONFIG_SAE
775 if (data->auth.auth_type == WLAN_AUTH_SAE) {
776 int res;
777 res = sme_sae_auth(wpa_s, data->auth.auth_transaction,
778 data->auth.status_code, data->auth.ies,
779 data->auth.ies_len);
780 if (res < 0) {
781 wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
782 wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED);
783
784 }
785 if (res != 1)
786 return;
787
788 wpa_printf(MSG_DEBUG, "SME: SAE completed - setting PMK for "
789 "4-way handshake");
790 wpa_sm_set_pmk(wpa_s->wpa, wpa_s->sme.sae.pmk, PMK_LEN,
791 wpa_s->pending_bssid);
792 }
793 #endif /* CONFIG_SAE */
794
795 if (data->auth.status_code != WLAN_STATUS_SUCCESS) {
796 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Authentication failed (status "
797 "code %d)", data->auth.status_code);
798
799 if (data->auth.status_code !=
800 WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG ||
801 wpa_s->sme.auth_alg == data->auth.auth_type ||
802 wpa_s->current_ssid->auth_alg == WPA_AUTH_ALG_LEAP) {
803 wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
804 wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED);
805 return;
806 }
807
808 wpas_connect_work_done(wpa_s);
809
810 switch (data->auth.auth_type) {
811 case WLAN_AUTH_OPEN:
812 wpa_s->current_ssid->auth_alg = WPA_AUTH_ALG_SHARED;
813
814 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Trying SHARED auth");
815 wpa_supplicant_associate(wpa_s, wpa_s->current_bss,
816 wpa_s->current_ssid);
817 return;
818
819 case WLAN_AUTH_SHARED_KEY:
820 wpa_s->current_ssid->auth_alg = WPA_AUTH_ALG_LEAP;
821
822 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Trying LEAP auth");
823 wpa_supplicant_associate(wpa_s, wpa_s->current_bss,
824 wpa_s->current_ssid);
825 return;
826
827 default:
828 return;
829 }
830 }
831
832 #ifdef CONFIG_IEEE80211R
833 if (data->auth.auth_type == WLAN_AUTH_FT) {
834 union wpa_event_data edata;
835 os_memset(&edata, 0, sizeof(edata));
836 edata.ft_ies.ies = data->auth.ies;
837 edata.ft_ies.ies_len = data->auth.ies_len;
838 os_memcpy(edata.ft_ies.target_ap, data->auth.peer, ETH_ALEN);
839 wpa_supplicant_event(wpa_s, EVENT_FT_RESPONSE, &edata);
840 }
841 #endif /* CONFIG_IEEE80211R */
842
843 sme_associate(wpa_s, ssid->mode, data->auth.peer,
844 data->auth.auth_type);
845 }
846
847
848 void sme_associate(struct wpa_supplicant *wpa_s, enum wpas_mode mode,
849 const u8 *bssid, u16 auth_type)
850 {
851 struct wpa_driver_associate_params params;
852 struct ieee802_11_elems elems;
853 #ifdef CONFIG_HT_OVERRIDES
854 struct ieee80211_ht_capabilities htcaps;
855 struct ieee80211_ht_capabilities htcaps_mask;
856 #endif /* CONFIG_HT_OVERRIDES */
857 #ifdef CONFIG_VHT_OVERRIDES
858 struct ieee80211_vht_capabilities vhtcaps;
859 struct ieee80211_vht_capabilities vhtcaps_mask;
860 #endif /* CONFIG_VHT_OVERRIDES */
861
862 os_memset(&params, 0, sizeof(params));
863 params.bssid = bssid;
864 params.ssid = wpa_s->sme.ssid;
865 params.ssid_len = wpa_s->sme.ssid_len;
866 params.freq.freq = wpa_s->sme.freq;
867 params.bg_scan_period = wpa_s->current_ssid ?
868 wpa_s->current_ssid->bg_scan_period : -1;
869 params.wpa_ie = wpa_s->sme.assoc_req_ie_len ?
870 wpa_s->sme.assoc_req_ie : NULL;
871 params.wpa_ie_len = wpa_s->sme.assoc_req_ie_len;
872 params.pairwise_suite = wpa_s->pairwise_cipher;
873 params.group_suite = wpa_s->group_cipher;
874 params.key_mgmt_suite = wpa_s->key_mgmt;
875 params.wpa_proto = wpa_s->wpa_proto;
876 #ifdef CONFIG_HT_OVERRIDES
877 os_memset(&htcaps, 0, sizeof(htcaps));
878 os_memset(&htcaps_mask, 0, sizeof(htcaps_mask));
879 params.htcaps = (u8 *) &htcaps;
880 params.htcaps_mask = (u8 *) &htcaps_mask;
881 wpa_supplicant_apply_ht_overrides(wpa_s, wpa_s->current_ssid, &params);
882 #endif /* CONFIG_HT_OVERRIDES */
883 #ifdef CONFIG_VHT_OVERRIDES
884 os_memset(&vhtcaps, 0, sizeof(vhtcaps));
885 os_memset(&vhtcaps_mask, 0, sizeof(vhtcaps_mask));
886 params.vhtcaps = &vhtcaps;
887 params.vhtcaps_mask = &vhtcaps_mask;
888 wpa_supplicant_apply_vht_overrides(wpa_s, wpa_s->current_ssid, &params);
889 #endif /* CONFIG_VHT_OVERRIDES */
890 #ifdef CONFIG_IEEE80211R
891 if (auth_type == WLAN_AUTH_FT && wpa_s->sme.ft_ies) {
892 params.wpa_ie = wpa_s->sme.ft_ies;
893 params.wpa_ie_len = wpa_s->sme.ft_ies_len;
894 }
895 #endif /* CONFIG_IEEE80211R */
896 params.mode = mode;
897 params.mgmt_frame_protection = wpa_s->sme.mfp;
898 params.rrm_used = wpa_s->rrm.rrm_used;
899 if (wpa_s->sme.prev_bssid_set)
900 params.prev_bssid = wpa_s->sme.prev_bssid;
901
902 wpa_msg(wpa_s, MSG_INFO, "Trying to associate with " MACSTR
903 " (SSID='%s' freq=%d MHz)", MAC2STR(params.bssid),
904 params.ssid ? wpa_ssid_txt(params.ssid, params.ssid_len) : "",
905 params.freq.freq);
906
907 wpa_supplicant_set_state(wpa_s, WPA_ASSOCIATING);
908
909 if (params.wpa_ie == NULL ||
910 ieee802_11_parse_elems(params.wpa_ie, params.wpa_ie_len, &elems, 0)
911 < 0) {
912 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Could not parse own IEs?!");
913 os_memset(&elems, 0, sizeof(elems));
914 }
915 if (elems.rsn_ie) {
916 params.wpa_proto = WPA_PROTO_RSN;
917 wpa_sm_set_assoc_wpa_ie(wpa_s->wpa, elems.rsn_ie - 2,
918 elems.rsn_ie_len + 2);
919 } else if (elems.wpa_ie) {
920 params.wpa_proto = WPA_PROTO_WPA;
921 wpa_sm_set_assoc_wpa_ie(wpa_s->wpa, elems.wpa_ie - 2,
922 elems.wpa_ie_len + 2);
923 } else if (elems.osen) {
924 params.wpa_proto = WPA_PROTO_OSEN;
925 wpa_sm_set_assoc_wpa_ie(wpa_s->wpa, elems.osen - 2,
926 elems.osen_len + 2);
927 } else
928 wpa_sm_set_assoc_wpa_ie(wpa_s->wpa, NULL, 0);
929 if (wpa_s->current_ssid && wpa_s->current_ssid->p2p_group)
930 params.p2p = 1;
931
932 if (wpa_s->parent->set_sta_uapsd)
933 params.uapsd = wpa_s->parent->sta_uapsd;
934 else
935 params.uapsd = -1;
936
937 if (wpa_drv_associate(wpa_s, &params) < 0) {
938 wpa_msg(wpa_s, MSG_INFO, "SME: Association request to the "
939 "driver failed");
940 wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
941 wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED);
942 os_memset(wpa_s->pending_bssid, 0, ETH_ALEN);
943 return;
944 }
945
946 eloop_register_timeout(SME_ASSOC_TIMEOUT, 0, sme_assoc_timer, wpa_s,
947 NULL);
948 }
949
950
951 int sme_update_ft_ies(struct wpa_supplicant *wpa_s, const u8 *md,
952 const u8 *ies, size_t ies_len)
953 {
954 if (md == NULL || ies == NULL) {
955 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Remove mobility domain");
956 os_free(wpa_s->sme.ft_ies);
957 wpa_s->sme.ft_ies = NULL;
958 wpa_s->sme.ft_ies_len = 0;
959 wpa_s->sme.ft_used = 0;
960 return 0;
961 }
962
963 os_memcpy(wpa_s->sme.mobility_domain, md, MOBILITY_DOMAIN_ID_LEN);
964 wpa_hexdump(MSG_DEBUG, "SME: FT IEs", ies, ies_len);
965 os_free(wpa_s->sme.ft_ies);
966 wpa_s->sme.ft_ies = os_malloc(ies_len);
967 if (wpa_s->sme.ft_ies == NULL)
968 return -1;
969 os_memcpy(wpa_s->sme.ft_ies, ies, ies_len);
970 wpa_s->sme.ft_ies_len = ies_len;
971 return 0;
972 }
973
974
975 static void sme_deauth(struct wpa_supplicant *wpa_s)
976 {
977 int bssid_changed;
978
979 bssid_changed = !is_zero_ether_addr(wpa_s->bssid);
980
981 if (wpa_drv_deauthenticate(wpa_s, wpa_s->pending_bssid,
982 WLAN_REASON_DEAUTH_LEAVING) < 0) {
983 wpa_msg(wpa_s, MSG_INFO, "SME: Deauth request to the driver "
984 "failed");
985 }
986 wpa_s->sme.prev_bssid_set = 0;
987
988 wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
989 wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED);
990 os_memset(wpa_s->bssid, 0, ETH_ALEN);
991 os_memset(wpa_s->pending_bssid, 0, ETH_ALEN);
992 if (bssid_changed)
993 wpas_notify_bssid_changed(wpa_s);
994 }
995
996
997 void sme_event_assoc_reject(struct wpa_supplicant *wpa_s,
998 union wpa_event_data *data)
999 {
1000 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Association with " MACSTR " failed: "
1001 "status code %d", MAC2STR(wpa_s->pending_bssid),
1002 data->assoc_reject.status_code);
1003
1004 eloop_cancel_timeout(sme_assoc_timer, wpa_s, NULL);
1005
1006 #ifdef CONFIG_SAE
1007 if (wpa_s->sme.sae_pmksa_caching && wpa_s->current_ssid &&
1008 wpa_key_mgmt_sae(wpa_s->current_ssid->key_mgmt)) {
1009 wpa_dbg(wpa_s, MSG_DEBUG,
1010 "PMKSA caching attempt rejected - drop PMKSA cache entry and fall back to SAE authentication");
1011 wpa_sm_aborted_cached(wpa_s->wpa);
1012 wpa_sm_pmksa_cache_flush(wpa_s->wpa, wpa_s->current_ssid);
1013 if (wpa_s->current_bss) {
1014 struct wpa_bss *bss = wpa_s->current_bss;
1015 struct wpa_ssid *ssid = wpa_s->current_ssid;
1016
1017 wpa_drv_deauthenticate(wpa_s, wpa_s->pending_bssid,
1018 WLAN_REASON_DEAUTH_LEAVING);
1019 wpas_connect_work_done(wpa_s);
1020 wpa_supplicant_mark_disassoc(wpa_s);
1021 wpa_supplicant_connect(wpa_s, bss, ssid);
1022 return;
1023 }
1024 }
1025 #endif /* CONFIG_SAE */
1026
1027 /*
1028 * For now, unconditionally terminate the previous authentication. In
1029 * theory, this should not be needed, but mac80211 gets quite confused
1030 * if the authentication is left pending.. Some roaming cases might
1031 * benefit from using the previous authentication, so this could be
1032 * optimized in the future.
1033 */
1034 sme_deauth(wpa_s);
1035 }
1036
1037
1038 void sme_event_auth_timed_out(struct wpa_supplicant *wpa_s,
1039 union wpa_event_data *data)
1040 {
1041 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Authentication timed out");
1042 wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
1043 wpa_supplicant_mark_disassoc(wpa_s);
1044 }
1045
1046
1047 void sme_event_assoc_timed_out(struct wpa_supplicant *wpa_s,
1048 union wpa_event_data *data)
1049 {
1050 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Association timed out");
1051 wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
1052 wpa_supplicant_mark_disassoc(wpa_s);
1053 }
1054
1055
1056 void sme_event_disassoc(struct wpa_supplicant *wpa_s,
1057 struct disassoc_info *info)
1058 {
1059 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Disassociation event received");
1060 if (wpa_s->sme.prev_bssid_set) {
1061 /*
1062 * cfg80211/mac80211 can get into somewhat confused state if
1063 * the AP only disassociates us and leaves us in authenticated
1064 * state. For now, force the state to be cleared to avoid
1065 * confusing errors if we try to associate with the AP again.
1066 */
1067 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Deauthenticate to clear "
1068 "driver state");
1069 wpa_drv_deauthenticate(wpa_s, wpa_s->sme.prev_bssid,
1070 WLAN_REASON_DEAUTH_LEAVING);
1071 }
1072 }
1073
1074
1075 static void sme_auth_timer(void *eloop_ctx, void *timeout_ctx)
1076 {
1077 struct wpa_supplicant *wpa_s = eloop_ctx;
1078 if (wpa_s->wpa_state == WPA_AUTHENTICATING) {
1079 wpa_msg(wpa_s, MSG_DEBUG, "SME: Authentication timeout");
1080 sme_deauth(wpa_s);
1081 }
1082 }
1083
1084
1085 static void sme_assoc_timer(void *eloop_ctx, void *timeout_ctx)
1086 {
1087 struct wpa_supplicant *wpa_s = eloop_ctx;
1088 if (wpa_s->wpa_state == WPA_ASSOCIATING) {
1089 wpa_msg(wpa_s, MSG_DEBUG, "SME: Association timeout");
1090 sme_deauth(wpa_s);
1091 }
1092 }
1093
1094
1095 void sme_state_changed(struct wpa_supplicant *wpa_s)
1096 {
1097 /* Make sure timers are cleaned up appropriately. */
1098 if (wpa_s->wpa_state != WPA_ASSOCIATING)
1099 eloop_cancel_timeout(sme_assoc_timer, wpa_s, NULL);
1100 if (wpa_s->wpa_state != WPA_AUTHENTICATING)
1101 eloop_cancel_timeout(sme_auth_timer, wpa_s, NULL);
1102 }
1103
1104
1105 void sme_disassoc_while_authenticating(struct wpa_supplicant *wpa_s,
1106 const u8 *prev_pending_bssid)
1107 {
1108 /*
1109 * mac80211-workaround to force deauth on failed auth cmd,
1110 * requires us to remain in authenticating state to allow the
1111 * second authentication attempt to be continued properly.
1112 */
1113 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Allow pending authentication "
1114 "to proceed after disconnection event");
1115 wpa_supplicant_set_state(wpa_s, WPA_AUTHENTICATING);
1116 os_memcpy(wpa_s->pending_bssid, prev_pending_bssid, ETH_ALEN);
1117
1118 /*
1119 * Re-arm authentication timer in case auth fails for whatever reason.
1120 */
1121 eloop_cancel_timeout(sme_auth_timer, wpa_s, NULL);
1122 eloop_register_timeout(SME_AUTH_TIMEOUT, 0, sme_auth_timer, wpa_s,
1123 NULL);
1124 }
1125
1126
1127 void sme_clear_on_disassoc(struct wpa_supplicant *wpa_s)
1128 {
1129 wpa_s->sme.prev_bssid_set = 0;
1130 #ifdef CONFIG_SAE
1131 wpabuf_free(wpa_s->sme.sae_token);
1132 wpa_s->sme.sae_token = NULL;
1133 sae_clear_data(&wpa_s->sme.sae);
1134 #endif /* CONFIG_SAE */
1135 #ifdef CONFIG_IEEE80211R
1136 if (wpa_s->sme.ft_ies)
1137 sme_update_ft_ies(wpa_s, NULL, NULL, 0);
1138 #endif /* CONFIG_IEEE80211R */
1139 }
1140
1141
1142 void sme_deinit(struct wpa_supplicant *wpa_s)
1143 {
1144 os_free(wpa_s->sme.ft_ies);
1145 wpa_s->sme.ft_ies = NULL;
1146 wpa_s->sme.ft_ies_len = 0;
1147 #ifdef CONFIG_IEEE80211W
1148 sme_stop_sa_query(wpa_s);
1149 #endif /* CONFIG_IEEE80211W */
1150 sme_clear_on_disassoc(wpa_s);
1151
1152 eloop_cancel_timeout(sme_assoc_timer, wpa_s, NULL);
1153 eloop_cancel_timeout(sme_auth_timer, wpa_s, NULL);
1154 eloop_cancel_timeout(sme_obss_scan_timeout, wpa_s, NULL);
1155 }
1156
1157
1158 static void sme_send_2040_bss_coex(struct wpa_supplicant *wpa_s,
1159 const u8 *chan_list, u8 num_channels,
1160 u8 num_intol)
1161 {
1162 struct ieee80211_2040_bss_coex_ie *bc_ie;
1163 struct ieee80211_2040_intol_chan_report *ic_report;
1164 struct wpabuf *buf;
1165
1166 wpa_printf(MSG_DEBUG, "SME: Send 20/40 BSS Coexistence to " MACSTR
1167 " (num_channels=%u num_intol=%u)",
1168 MAC2STR(wpa_s->bssid), num_channels, num_intol);
1169 wpa_hexdump(MSG_DEBUG, "SME: 20/40 BSS Intolerant Channels",
1170 chan_list, num_channels);
1171
1172 buf = wpabuf_alloc(2 + /* action.category + action_code */
1173 sizeof(struct ieee80211_2040_bss_coex_ie) +
1174 sizeof(struct ieee80211_2040_intol_chan_report) +
1175 num_channels);
1176 if (buf == NULL)
1177 return;
1178
1179 wpabuf_put_u8(buf, WLAN_ACTION_PUBLIC);
1180 wpabuf_put_u8(buf, WLAN_PA_20_40_BSS_COEX);
1181
1182 bc_ie = wpabuf_put(buf, sizeof(*bc_ie));
1183 bc_ie->element_id = WLAN_EID_20_40_BSS_COEXISTENCE;
1184 bc_ie->length = 1;
1185 if (num_intol)
1186 bc_ie->coex_param |= WLAN_20_40_BSS_COEX_20MHZ_WIDTH_REQ;
1187
1188 if (num_channels > 0) {
1189 ic_report = wpabuf_put(buf, sizeof(*ic_report));
1190 ic_report->element_id = WLAN_EID_20_40_BSS_INTOLERANT;
1191 ic_report->length = num_channels + 1;
1192 ic_report->op_class = 0;
1193 os_memcpy(wpabuf_put(buf, num_channels), chan_list,
1194 num_channels);
1195 }
1196
1197 if (wpa_drv_send_action(wpa_s, wpa_s->assoc_freq, 0, wpa_s->bssid,
1198 wpa_s->own_addr, wpa_s->bssid,
1199 wpabuf_head(buf), wpabuf_len(buf), 0) < 0) {
1200 wpa_msg(wpa_s, MSG_INFO,
1201 "SME: Failed to send 20/40 BSS Coexistence frame");
1202 }
1203
1204 wpabuf_free(buf);
1205 }
1206
1207
1208 int sme_proc_obss_scan(struct wpa_supplicant *wpa_s)
1209 {
1210 struct wpa_bss *bss;
1211 const u8 *ie;
1212 u16 ht_cap;
1213 u8 chan_list[P2P_MAX_CHANNELS], channel;
1214 u8 num_channels = 0, num_intol = 0, i;
1215
1216 if (!wpa_s->sme.sched_obss_scan)
1217 return 0;
1218
1219 wpa_s->sme.sched_obss_scan = 0;
1220 if (!wpa_s->current_bss || wpa_s->wpa_state != WPA_COMPLETED)
1221 return 1;
1222
1223 /*
1224 * Check whether AP uses regulatory triplet or channel triplet in
1225 * country info. Right now the operating class of the BSS channel
1226 * width trigger event is "unknown" (IEEE Std 802.11-2012 10.15.12),
1227 * based on the assumption that operating class triplet is not used in
1228 * beacon frame. If the First Channel Number/Operating Extension
1229 * Identifier octet has a positive integer value of 201 or greater,
1230 * then its operating class triplet.
1231 *
1232 * TODO: If Supported Operating Classes element is present in beacon
1233 * frame, have to lookup operating class in Annex E and fill them in
1234 * 2040 coex frame.
1235 */
1236 ie = wpa_bss_get_ie(wpa_s->current_bss, WLAN_EID_COUNTRY);
1237 if (ie && (ie[1] >= 6) && (ie[5] >= 201))
1238 return 1;
1239
1240 os_memset(chan_list, 0, sizeof(chan_list));
1241
1242 dl_list_for_each(bss, &wpa_s->bss, struct wpa_bss, list) {
1243 /* Skip other band bss */
1244 enum hostapd_hw_mode mode;
1245 mode = ieee80211_freq_to_chan(bss->freq, &channel);
1246 if (mode != HOSTAPD_MODE_IEEE80211G &&
1247 mode != HOSTAPD_MODE_IEEE80211B)
1248 continue;
1249
1250 ie = wpa_bss_get_ie(bss, WLAN_EID_HT_CAP);
1251 ht_cap = (ie && (ie[1] == 26)) ? WPA_GET_LE16(ie + 2) : 0;
1252 wpa_printf(MSG_DEBUG, "SME OBSS scan BSS " MACSTR
1253 " freq=%u chan=%u ht_cap=0x%x",
1254 MAC2STR(bss->bssid), bss->freq, channel, ht_cap);
1255
1256 if (!ht_cap || (ht_cap & HT_CAP_INFO_40MHZ_INTOLERANT)) {
1257 if (ht_cap & HT_CAP_INFO_40MHZ_INTOLERANT)
1258 num_intol++;
1259
1260 /* Check whether the channel is already considered */
1261 for (i = 0; i < num_channels; i++) {
1262 if (channel == chan_list[i])
1263 break;
1264 }
1265 if (i != num_channels)
1266 continue;
1267
1268 chan_list[num_channels++] = channel;
1269 }
1270 }
1271
1272 sme_send_2040_bss_coex(wpa_s, chan_list, num_channels, num_intol);
1273 return 1;
1274 }
1275
1276
1277 static struct hostapd_hw_modes * get_mode(struct hostapd_hw_modes *modes,
1278 u16 num_modes,
1279 enum hostapd_hw_mode mode)
1280 {
1281 u16 i;
1282
1283 for (i = 0; i < num_modes; i++) {
1284 if (modes[i].mode == mode)
1285 return &modes[i];
1286 }
1287
1288 return NULL;
1289 }
1290
1291
1292 static void wpa_obss_scan_freqs_list(struct wpa_supplicant *wpa_s,
1293 struct wpa_driver_scan_params *params)
1294 {
1295 /* Include only affected channels */
1296 struct hostapd_hw_modes *mode;
1297 int count, i;
1298 int start, end;
1299
1300 mode = get_mode(wpa_s->hw.modes, wpa_s->hw.num_modes,
1301 HOSTAPD_MODE_IEEE80211G);
1302 if (mode == NULL) {
1303 /* No channels supported in this band - use empty list */
1304 params->freqs = os_zalloc(sizeof(int));
1305 return;
1306 }
1307
1308 if (wpa_s->sme.ht_sec_chan == HT_SEC_CHAN_UNKNOWN &&
1309 wpa_s->current_bss) {
1310 const u8 *ie;
1311
1312 ie = wpa_bss_get_ie(wpa_s->current_bss, WLAN_EID_HT_OPERATION);
1313 if (ie && ie[1] >= 2) {
1314 u8 o;
1315
1316 o = ie[3] & HT_INFO_HT_PARAM_SECONDARY_CHNL_OFF_MASK;
1317 if (o == HT_INFO_HT_PARAM_SECONDARY_CHNL_ABOVE)
1318 wpa_s->sme.ht_sec_chan = HT_SEC_CHAN_ABOVE;
1319 else if (o == HT_INFO_HT_PARAM_SECONDARY_CHNL_BELOW)
1320 wpa_s->sme.ht_sec_chan = HT_SEC_CHAN_BELOW;
1321 }
1322 }
1323
1324 start = wpa_s->assoc_freq - 10;
1325 end = wpa_s->assoc_freq + 10;
1326 switch (wpa_s->sme.ht_sec_chan) {
1327 case HT_SEC_CHAN_UNKNOWN:
1328 /* HT40+ possible on channels 1..9 */
1329 if (wpa_s->assoc_freq <= 2452)
1330 start -= 20;
1331 /* HT40- possible on channels 5-13 */
1332 if (wpa_s->assoc_freq >= 2432)
1333 end += 20;
1334 break;
1335 case HT_SEC_CHAN_ABOVE:
1336 end += 20;
1337 break;
1338 case HT_SEC_CHAN_BELOW:
1339 start -= 20;
1340 break;
1341 }
1342 wpa_printf(MSG_DEBUG,
1343 "OBSS: assoc_freq %d possible affected range %d-%d",
1344 wpa_s->assoc_freq, start, end);
1345
1346 params->freqs = os_calloc(mode->num_channels + 1, sizeof(int));
1347 if (params->freqs == NULL)
1348 return;
1349 for (count = 0, i = 0; i < mode->num_channels; i++) {
1350 int freq;
1351
1352 if (mode->channels[i].flag & HOSTAPD_CHAN_DISABLED)
1353 continue;
1354 freq = mode->channels[i].freq;
1355 if (freq - 10 >= end || freq + 10 <= start)
1356 continue; /* not affected */
1357 params->freqs[count++] = freq;
1358 }
1359 }
1360
1361
1362 static void sme_obss_scan_timeout(void *eloop_ctx, void *timeout_ctx)
1363 {
1364 struct wpa_supplicant *wpa_s = eloop_ctx;
1365 struct wpa_driver_scan_params params;
1366
1367 if (!wpa_s->current_bss) {
1368 wpa_printf(MSG_DEBUG, "SME OBSS: Ignore scan request");
1369 return;
1370 }
1371
1372 os_memset(&params, 0, sizeof(params));
1373 wpa_obss_scan_freqs_list(wpa_s, &params);
1374 params.low_priority = 1;
1375 wpa_printf(MSG_DEBUG, "SME OBSS: Request an OBSS scan");
1376
1377 if (wpa_supplicant_trigger_scan(wpa_s, &params))
1378 wpa_printf(MSG_DEBUG, "SME OBSS: Failed to trigger scan");
1379 else
1380 wpa_s->sme.sched_obss_scan = 1;
1381 os_free(params.freqs);
1382
1383 eloop_register_timeout(wpa_s->sme.obss_scan_int, 0,
1384 sme_obss_scan_timeout, wpa_s, NULL);
1385 }
1386
1387
1388 void sme_sched_obss_scan(struct wpa_supplicant *wpa_s, int enable)
1389 {
1390 const u8 *ie;
1391 struct wpa_bss *bss = wpa_s->current_bss;
1392 struct wpa_ssid *ssid = wpa_s->current_ssid;
1393 struct hostapd_hw_modes *hw_mode = NULL;
1394 int i;
1395
1396 eloop_cancel_timeout(sme_obss_scan_timeout, wpa_s, NULL);
1397 wpa_s->sme.sched_obss_scan = 0;
1398 wpa_s->sme.ht_sec_chan = HT_SEC_CHAN_UNKNOWN;
1399 if (!enable)
1400 return;
1401
1402 /*
1403 * Schedule OBSS scan if driver is using station SME in wpa_supplicant
1404 * or it expects OBSS scan to be performed by wpa_supplicant.
1405 */
1406 if (!((wpa_s->drv_flags & WPA_DRIVER_FLAGS_SME) ||
1407 (wpa_s->drv_flags & WPA_DRIVER_FLAGS_OBSS_SCAN)) ||
1408 ssid == NULL || ssid->mode != IEEE80211_MODE_INFRA)
1409 return;
1410
1411 if (!wpa_s->hw.modes)
1412 return;
1413
1414 /* only HT caps in 11g mode are relevant */
1415 for (i = 0; i < wpa_s->hw.num_modes; i++) {
1416 hw_mode = &wpa_s->hw.modes[i];
1417 if (hw_mode->mode == HOSTAPD_MODE_IEEE80211G)
1418 break;
1419 }
1420
1421 /* Driver does not support HT40 for 11g or doesn't have 11g. */
1422 if (i == wpa_s->hw.num_modes || !hw_mode ||
1423 !(hw_mode->ht_capab & HT_CAP_INFO_SUPP_CHANNEL_WIDTH_SET))
1424 return;
1425
1426 if (bss == NULL || bss->freq < 2400 || bss->freq > 2500)
1427 return; /* Not associated on 2.4 GHz band */
1428
1429 /* Check whether AP supports HT40 */
1430 ie = wpa_bss_get_ie(wpa_s->current_bss, WLAN_EID_HT_CAP);
1431 if (!ie || ie[1] < 2 ||
1432 !(WPA_GET_LE16(ie + 2) & HT_CAP_INFO_SUPP_CHANNEL_WIDTH_SET))
1433 return; /* AP does not support HT40 */
1434
1435 ie = wpa_bss_get_ie(wpa_s->current_bss,
1436 WLAN_EID_OVERLAPPING_BSS_SCAN_PARAMS);
1437 if (!ie || ie[1] < 14)
1438 return; /* AP does not request OBSS scans */
1439
1440 wpa_s->sme.obss_scan_int = WPA_GET_LE16(ie + 6);
1441 if (wpa_s->sme.obss_scan_int < 10) {
1442 wpa_printf(MSG_DEBUG, "SME: Invalid OBSS Scan Interval %u "
1443 "replaced with the minimum 10 sec",
1444 wpa_s->sme.obss_scan_int);
1445 wpa_s->sme.obss_scan_int = 10;
1446 }
1447 wpa_printf(MSG_DEBUG, "SME: OBSS Scan Interval %u sec",
1448 wpa_s->sme.obss_scan_int);
1449 eloop_register_timeout(wpa_s->sme.obss_scan_int, 0,
1450 sme_obss_scan_timeout, wpa_s, NULL);
1451 }
1452
1453
1454 #ifdef CONFIG_IEEE80211W
1455
1456 static const unsigned int sa_query_max_timeout = 1000;
1457 static const unsigned int sa_query_retry_timeout = 201;
1458
1459 static int sme_check_sa_query_timeout(struct wpa_supplicant *wpa_s)
1460 {
1461 u32 tu;
1462 struct os_reltime now, passed;
1463 os_get_reltime(&now);
1464 os_reltime_sub(&now, &wpa_s->sme.sa_query_start, &passed);
1465 tu = (passed.sec * 1000000 + passed.usec) / 1024;
1466 if (sa_query_max_timeout < tu) {
1467 wpa_dbg(wpa_s, MSG_DEBUG, "SME: SA Query timed out");
1468 sme_stop_sa_query(wpa_s);
1469 wpa_supplicant_deauthenticate(
1470 wpa_s, WLAN_REASON_PREV_AUTH_NOT_VALID);
1471 return 1;
1472 }
1473
1474 return 0;
1475 }
1476
1477
1478 static void sme_send_sa_query_req(struct wpa_supplicant *wpa_s,
1479 const u8 *trans_id)
1480 {
1481 u8 req[2 + WLAN_SA_QUERY_TR_ID_LEN];
1482 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Sending SA Query Request to "
1483 MACSTR, MAC2STR(wpa_s->bssid));
1484 wpa_hexdump(MSG_DEBUG, "SME: SA Query Transaction ID",
1485 trans_id, WLAN_SA_QUERY_TR_ID_LEN);
1486 req[0] = WLAN_ACTION_SA_QUERY;
1487 req[1] = WLAN_SA_QUERY_REQUEST;
1488 os_memcpy(req + 2, trans_id, WLAN_SA_QUERY_TR_ID_LEN);
1489 if (wpa_drv_send_action(wpa_s, wpa_s->assoc_freq, 0, wpa_s->bssid,
1490 wpa_s->own_addr, wpa_s->bssid,
1491 req, sizeof(req), 0) < 0)
1492 wpa_msg(wpa_s, MSG_INFO, "SME: Failed to send SA Query "
1493 "Request");
1494 }
1495
1496
1497 static void sme_sa_query_timer(void *eloop_ctx, void *timeout_ctx)
1498 {
1499 struct wpa_supplicant *wpa_s = eloop_ctx;
1500 unsigned int timeout, sec, usec;
1501 u8 *trans_id, *nbuf;
1502
1503 if (wpa_s->sme.sa_query_count > 0 &&
1504 sme_check_sa_query_timeout(wpa_s))
1505 return;
1506
1507 nbuf = os_realloc_array(wpa_s->sme.sa_query_trans_id,
1508 wpa_s->sme.sa_query_count + 1,
1509 WLAN_SA_QUERY_TR_ID_LEN);
1510 if (nbuf == NULL)
1511 return;
1512 if (wpa_s->sme.sa_query_count == 0) {
1513 /* Starting a new SA Query procedure */
1514 os_get_reltime(&wpa_s->sme.sa_query_start);
1515 }
1516 trans_id = nbuf + wpa_s->sme.sa_query_count * WLAN_SA_QUERY_TR_ID_LEN;
1517 wpa_s->sme.sa_query_trans_id = nbuf;
1518 wpa_s->sme.sa_query_count++;
1519
1520 if (os_get_random(trans_id, WLAN_SA_QUERY_TR_ID_LEN) < 0) {
1521 wpa_printf(MSG_DEBUG, "Could not generate SA Query ID");
1522 return;
1523 }
1524
1525 timeout = sa_query_retry_timeout;
1526 sec = ((timeout / 1000) * 1024) / 1000;
1527 usec = (timeout % 1000) * 1024;
1528 eloop_register_timeout(sec, usec, sme_sa_query_timer, wpa_s, NULL);
1529
1530 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Association SA Query attempt %d",
1531 wpa_s->sme.sa_query_count);
1532
1533 sme_send_sa_query_req(wpa_s, trans_id);
1534 }
1535
1536
1537 static void sme_start_sa_query(struct wpa_supplicant *wpa_s)
1538 {
1539 sme_sa_query_timer(wpa_s, NULL);
1540 }
1541
1542
1543 static void sme_stop_sa_query(struct wpa_supplicant *wpa_s)
1544 {
1545 eloop_cancel_timeout(sme_sa_query_timer, wpa_s, NULL);
1546 os_free(wpa_s->sme.sa_query_trans_id);
1547 wpa_s->sme.sa_query_trans_id = NULL;
1548 wpa_s->sme.sa_query_count = 0;
1549 }
1550
1551
1552 void sme_event_unprot_disconnect(struct wpa_supplicant *wpa_s, const u8 *sa,
1553 const u8 *da, u16 reason_code)
1554 {
1555 struct wpa_ssid *ssid;
1556 struct os_reltime now;
1557
1558 if (wpa_s->wpa_state != WPA_COMPLETED)
1559 return;
1560 ssid = wpa_s->current_ssid;
1561 if (wpas_get_ssid_pmf(wpa_s, ssid) == NO_MGMT_FRAME_PROTECTION)
1562 return;
1563 if (os_memcmp(sa, wpa_s->bssid, ETH_ALEN) != 0)
1564 return;
1565 if (reason_code != WLAN_REASON_CLASS2_FRAME_FROM_NONAUTH_STA &&
1566 reason_code != WLAN_REASON_CLASS3_FRAME_FROM_NONASSOC_STA)
1567 return;
1568 if (wpa_s->sme.sa_query_count > 0)
1569 return;
1570
1571 os_get_reltime(&now);
1572 if (wpa_s->sme.last_unprot_disconnect.sec &&
1573 !os_reltime_expired(&now, &wpa_s->sme.last_unprot_disconnect, 10))
1574 return; /* limit SA Query procedure frequency */
1575 wpa_s->sme.last_unprot_disconnect = now;
1576
1577 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Unprotected disconnect dropped - "
1578 "possible AP/STA state mismatch - trigger SA Query");
1579 sme_start_sa_query(wpa_s);
1580 }
1581
1582
1583 void sme_sa_query_rx(struct wpa_supplicant *wpa_s, const u8 *sa,
1584 const u8 *data, size_t len)
1585 {
1586 int i;
1587
1588 if (wpa_s->sme.sa_query_trans_id == NULL ||
1589 len < 1 + WLAN_SA_QUERY_TR_ID_LEN ||
1590 data[0] != WLAN_SA_QUERY_RESPONSE)
1591 return;
1592 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Received SA Query response from "
1593 MACSTR " (trans_id %02x%02x)", MAC2STR(sa), data[1], data[2]);
1594
1595 if (os_memcmp(sa, wpa_s->bssid, ETH_ALEN) != 0)
1596 return;
1597
1598 for (i = 0; i < wpa_s->sme.sa_query_count; i++) {
1599 if (os_memcmp(wpa_s->sme.sa_query_trans_id +
1600 i * WLAN_SA_QUERY_TR_ID_LEN,
1601 data + 1, WLAN_SA_QUERY_TR_ID_LEN) == 0)
1602 break;
1603 }
1604
1605 if (i >= wpa_s->sme.sa_query_count) {
1606 wpa_dbg(wpa_s, MSG_DEBUG, "SME: No matching SA Query "
1607 "transaction identifier found");
1608 return;
1609 }
1610
1611 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Reply to pending SA Query received "
1612 "from " MACSTR, MAC2STR(sa));
1613 sme_stop_sa_query(wpa_s);
1614 }
1615
1616 #endif /* CONFIG_IEEE80211W */
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