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[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 static void sme_send_authentication(struct wpa_supplicant *wpa_s,
141 struct wpa_bss *bss, struct wpa_ssid *ssid,
142 int start)
143 {
144 struct wpa_driver_auth_params params;
145 struct wpa_ssid *old_ssid;
146 #ifdef CONFIG_IEEE80211R
147 const u8 *ie;
148 #endif /* CONFIG_IEEE80211R */
149 #ifdef CONFIG_IEEE80211R
150 const u8 *md = NULL;
151 #endif /* CONFIG_IEEE80211R */
152 int i, bssid_changed;
153 struct wpabuf *resp = NULL;
154 u8 ext_capab[18];
155 int ext_capab_len;
156
157 if (bss == NULL) {
158 wpa_msg(wpa_s, MSG_ERROR, "SME: No scan result available for "
159 "the network");
160 wpas_connect_work_done(wpa_s);
161 return;
162 }
163
164 wpa_s->current_bss = bss;
165
166 os_memset(&params, 0, sizeof(params));
167 wpa_s->reassociate = 0;
168
169 params.freq = bss->freq;
170 params.bssid = bss->bssid;
171 params.ssid = bss->ssid;
172 params.ssid_len = bss->ssid_len;
173 params.p2p = ssid->p2p_group;
174
175 if (wpa_s->sme.ssid_len != params.ssid_len ||
176 os_memcmp(wpa_s->sme.ssid, params.ssid, params.ssid_len) != 0)
177 wpa_s->sme.prev_bssid_set = 0;
178
179 wpa_s->sme.freq = params.freq;
180 os_memcpy(wpa_s->sme.ssid, params.ssid, params.ssid_len);
181 wpa_s->sme.ssid_len = params.ssid_len;
182
183 params.auth_alg = WPA_AUTH_ALG_OPEN;
184 #ifdef IEEE8021X_EAPOL
185 if (ssid->key_mgmt & WPA_KEY_MGMT_IEEE8021X_NO_WPA) {
186 if (ssid->leap) {
187 if (ssid->non_leap == 0)
188 params.auth_alg = WPA_AUTH_ALG_LEAP;
189 else
190 params.auth_alg |= WPA_AUTH_ALG_LEAP;
191 }
192 }
193 #endif /* IEEE8021X_EAPOL */
194 wpa_dbg(wpa_s, MSG_DEBUG, "Automatic auth_alg selection: 0x%x",
195 params.auth_alg);
196 if (ssid->auth_alg) {
197 params.auth_alg = ssid->auth_alg;
198 wpa_dbg(wpa_s, MSG_DEBUG, "Overriding auth_alg selection: "
199 "0x%x", params.auth_alg);
200 }
201 #ifdef CONFIG_SAE
202 if (wpa_key_mgmt_sae(ssid->key_mgmt)) {
203 const u8 *rsn;
204 struct wpa_ie_data ied;
205
206 rsn = wpa_bss_get_ie(bss, WLAN_EID_RSN);
207 if (rsn &&
208 wpa_parse_wpa_ie(rsn, 2 + rsn[1], &ied) == 0) {
209 if (wpa_key_mgmt_sae(ied.key_mgmt)) {
210 wpa_dbg(wpa_s, MSG_DEBUG, "Using SAE auth_alg");
211 params.auth_alg = WPA_AUTH_ALG_SAE;
212 }
213 }
214 }
215 #endif /* CONFIG_SAE */
216
217 for (i = 0; i < NUM_WEP_KEYS; i++) {
218 if (ssid->wep_key_len[i])
219 params.wep_key[i] = ssid->wep_key[i];
220 params.wep_key_len[i] = ssid->wep_key_len[i];
221 }
222 params.wep_tx_keyidx = ssid->wep_tx_keyidx;
223
224 bssid_changed = !is_zero_ether_addr(wpa_s->bssid);
225 os_memset(wpa_s->bssid, 0, ETH_ALEN);
226 os_memcpy(wpa_s->pending_bssid, bss->bssid, ETH_ALEN);
227 if (bssid_changed)
228 wpas_notify_bssid_changed(wpa_s);
229
230 if ((wpa_bss_get_vendor_ie(bss, WPA_IE_VENDOR_TYPE) ||
231 wpa_bss_get_ie(bss, WLAN_EID_RSN)) &&
232 wpa_key_mgmt_wpa(ssid->key_mgmt)) {
233 int try_opportunistic;
234 try_opportunistic = (ssid->proactive_key_caching < 0 ?
235 wpa_s->conf->okc :
236 ssid->proactive_key_caching) &&
237 (ssid->proto & WPA_PROTO_RSN);
238 if (pmksa_cache_set_current(wpa_s->wpa, NULL, bss->bssid,
239 wpa_s->current_ssid,
240 try_opportunistic) == 0)
241 eapol_sm_notify_pmkid_attempt(wpa_s->eapol, 1);
242 wpa_s->sme.assoc_req_ie_len = sizeof(wpa_s->sme.assoc_req_ie);
243 if (wpa_supplicant_set_suites(wpa_s, bss, ssid,
244 wpa_s->sme.assoc_req_ie,
245 &wpa_s->sme.assoc_req_ie_len)) {
246 wpa_msg(wpa_s, MSG_WARNING, "SME: Failed to set WPA "
247 "key management and encryption suites");
248 wpas_connect_work_done(wpa_s);
249 return;
250 }
251 } else if ((ssid->key_mgmt & WPA_KEY_MGMT_IEEE8021X_NO_WPA) &&
252 wpa_key_mgmt_wpa_ieee8021x(ssid->key_mgmt)) {
253 /*
254 * Both WPA and non-WPA IEEE 802.1X enabled in configuration -
255 * use non-WPA since the scan results did not indicate that the
256 * AP is using WPA or WPA2.
257 */
258 wpa_supplicant_set_non_wpa_policy(wpa_s, ssid);
259 wpa_s->sme.assoc_req_ie_len = 0;
260 } else if (wpa_key_mgmt_wpa_any(ssid->key_mgmt)) {
261 wpa_s->sme.assoc_req_ie_len = sizeof(wpa_s->sme.assoc_req_ie);
262 if (wpa_supplicant_set_suites(wpa_s, NULL, ssid,
263 wpa_s->sme.assoc_req_ie,
264 &wpa_s->sme.assoc_req_ie_len)) {
265 wpa_msg(wpa_s, MSG_WARNING, "SME: Failed to set WPA "
266 "key management and encryption suites (no "
267 "scan results)");
268 wpas_connect_work_done(wpa_s);
269 return;
270 }
271 #ifdef CONFIG_WPS
272 } else if (ssid->key_mgmt & WPA_KEY_MGMT_WPS) {
273 struct wpabuf *wps_ie;
274 wps_ie = wps_build_assoc_req_ie(wpas_wps_get_req_type(ssid));
275 if (wps_ie && wpabuf_len(wps_ie) <=
276 sizeof(wpa_s->sme.assoc_req_ie)) {
277 wpa_s->sme.assoc_req_ie_len = wpabuf_len(wps_ie);
278 os_memcpy(wpa_s->sme.assoc_req_ie, wpabuf_head(wps_ie),
279 wpa_s->sme.assoc_req_ie_len);
280 } else
281 wpa_s->sme.assoc_req_ie_len = 0;
282 wpabuf_free(wps_ie);
283 wpa_supplicant_set_non_wpa_policy(wpa_s, ssid);
284 #endif /* CONFIG_WPS */
285 } else {
286 wpa_supplicant_set_non_wpa_policy(wpa_s, ssid);
287 wpa_s->sme.assoc_req_ie_len = 0;
288 }
289
290 #ifdef CONFIG_IEEE80211R
291 ie = wpa_bss_get_ie(bss, WLAN_EID_MOBILITY_DOMAIN);
292 if (ie && ie[1] >= MOBILITY_DOMAIN_ID_LEN)
293 md = ie + 2;
294 wpa_sm_set_ft_params(wpa_s->wpa, ie, ie ? 2 + ie[1] : 0);
295 if (md) {
296 /* Prepare for the next transition */
297 wpa_ft_prepare_auth_request(wpa_s->wpa, ie);
298 }
299
300 if (md && wpa_key_mgmt_ft(ssid->key_mgmt)) {
301 if (wpa_s->sme.assoc_req_ie_len + 5 <
302 sizeof(wpa_s->sme.assoc_req_ie)) {
303 struct rsn_mdie *mdie;
304 u8 *pos = wpa_s->sme.assoc_req_ie +
305 wpa_s->sme.assoc_req_ie_len;
306 *pos++ = WLAN_EID_MOBILITY_DOMAIN;
307 *pos++ = sizeof(*mdie);
308 mdie = (struct rsn_mdie *) pos;
309 os_memcpy(mdie->mobility_domain, md,
310 MOBILITY_DOMAIN_ID_LEN);
311 mdie->ft_capab = md[MOBILITY_DOMAIN_ID_LEN];
312 wpa_s->sme.assoc_req_ie_len += 5;
313 }
314
315 if (wpa_s->sme.ft_used &&
316 os_memcmp(md, wpa_s->sme.mobility_domain, 2) == 0 &&
317 wpa_sm_has_ptk(wpa_s->wpa)) {
318 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Trying to use FT "
319 "over-the-air");
320 params.auth_alg = WPA_AUTH_ALG_FT;
321 params.ie = wpa_s->sme.ft_ies;
322 params.ie_len = wpa_s->sme.ft_ies_len;
323 }
324 }
325 #endif /* CONFIG_IEEE80211R */
326
327 #ifdef CONFIG_IEEE80211W
328 wpa_s->sme.mfp = ssid->ieee80211w == MGMT_FRAME_PROTECTION_DEFAULT ?
329 wpa_s->conf->pmf : ssid->ieee80211w;
330 if (wpa_s->sme.mfp != NO_MGMT_FRAME_PROTECTION) {
331 const u8 *rsn = wpa_bss_get_ie(bss, WLAN_EID_RSN);
332 struct wpa_ie_data _ie;
333 if (rsn && wpa_parse_wpa_ie(rsn, 2 + rsn[1], &_ie) == 0 &&
334 _ie.capabilities &
335 (WPA_CAPABILITY_MFPC | WPA_CAPABILITY_MFPR)) {
336 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Selected AP supports "
337 "MFP: require MFP");
338 wpa_s->sme.mfp = MGMT_FRAME_PROTECTION_REQUIRED;
339 }
340 }
341 #endif /* CONFIG_IEEE80211W */
342
343 #ifdef CONFIG_P2P
344 if (wpa_s->global->p2p) {
345 u8 *pos;
346 size_t len;
347 int res;
348 pos = wpa_s->sme.assoc_req_ie + wpa_s->sme.assoc_req_ie_len;
349 len = sizeof(wpa_s->sme.assoc_req_ie) -
350 wpa_s->sme.assoc_req_ie_len;
351 res = wpas_p2p_assoc_req_ie(wpa_s, bss, pos, len,
352 ssid->p2p_group);
353 if (res >= 0)
354 wpa_s->sme.assoc_req_ie_len += res;
355 }
356 #endif /* CONFIG_P2P */
357
358 #ifdef CONFIG_HS20
359 if (is_hs20_network(wpa_s, ssid, bss)) {
360 struct wpabuf *hs20;
361 hs20 = wpabuf_alloc(20);
362 if (hs20) {
363 int pps_mo_id = hs20_get_pps_mo_id(wpa_s, ssid);
364 wpas_hs20_add_indication(hs20, pps_mo_id);
365 os_memcpy(wpa_s->sme.assoc_req_ie +
366 wpa_s->sme.assoc_req_ie_len,
367 wpabuf_head(hs20), wpabuf_len(hs20));
368 wpa_s->sme.assoc_req_ie_len += wpabuf_len(hs20);
369 wpabuf_free(hs20);
370 }
371 }
372 #endif /* CONFIG_HS20 */
373
374 ext_capab_len = wpas_build_ext_capab(wpa_s, ext_capab,
375 sizeof(ext_capab));
376 if (ext_capab_len > 0) {
377 u8 *pos = wpa_s->sme.assoc_req_ie;
378 if (wpa_s->sme.assoc_req_ie_len > 0 && pos[0] == WLAN_EID_RSN)
379 pos += 2 + pos[1];
380 os_memmove(pos + ext_capab_len, pos,
381 wpa_s->sme.assoc_req_ie_len -
382 (pos - wpa_s->sme.assoc_req_ie));
383 wpa_s->sme.assoc_req_ie_len += ext_capab_len;
384 os_memcpy(pos, ext_capab, ext_capab_len);
385 }
386
387 #ifdef CONFIG_SAE
388 if (params.auth_alg == WPA_AUTH_ALG_SAE) {
389 if (start)
390 resp = sme_auth_build_sae_commit(wpa_s, ssid,
391 bss->bssid);
392 else
393 resp = sme_auth_build_sae_confirm(wpa_s);
394 if (resp == NULL) {
395 wpas_connect_work_done(wpa_s);
396 return;
397 }
398 params.sae_data = wpabuf_head(resp);
399 params.sae_data_len = wpabuf_len(resp);
400 wpa_s->sme.sae.state = start ? SAE_COMMITTED : SAE_CONFIRMED;
401 }
402 #endif /* CONFIG_SAE */
403
404 wpa_supplicant_cancel_sched_scan(wpa_s);
405 wpa_supplicant_cancel_scan(wpa_s);
406
407 wpa_msg(wpa_s, MSG_INFO, "SME: Trying to authenticate with " MACSTR
408 " (SSID='%s' freq=%d MHz)", MAC2STR(params.bssid),
409 wpa_ssid_txt(params.ssid, params.ssid_len), params.freq);
410
411 wpa_clear_keys(wpa_s, bss->bssid);
412 wpa_supplicant_set_state(wpa_s, WPA_AUTHENTICATING);
413 old_ssid = wpa_s->current_ssid;
414 wpa_s->current_ssid = ssid;
415 wpa_supplicant_rsn_supp_set_config(wpa_s, wpa_s->current_ssid);
416 wpa_supplicant_initiate_eapol(wpa_s);
417 if (old_ssid != wpa_s->current_ssid)
418 wpas_notify_network_changed(wpa_s);
419
420 #ifdef CONFIG_P2P
421 /*
422 * If multi-channel concurrency is not supported, check for any
423 * frequency conflict. In case of any frequency conflict, remove the
424 * least prioritized connection.
425 */
426 if (wpa_s->num_multichan_concurrent < 2) {
427 int freq, num;
428 num = get_shared_radio_freqs(wpa_s, &freq, 1);
429 if (num > 0 && freq > 0 && freq != params.freq) {
430 wpa_printf(MSG_DEBUG,
431 "Conflicting frequency found (%d != %d)",
432 freq, params.freq);
433 if (wpas_p2p_handle_frequency_conflicts(wpa_s,
434 params.freq,
435 ssid) < 0) {
436 wpas_connection_failed(wpa_s, bss->bssid);
437 wpa_supplicant_mark_disassoc(wpa_s);
438 wpabuf_free(resp);
439 wpas_connect_work_done(wpa_s);
440 return;
441 }
442 }
443 }
444 #endif /* CONFIG_P2P */
445
446 wpa_s->sme.auth_alg = params.auth_alg;
447 if (wpa_drv_authenticate(wpa_s, &params) < 0) {
448 wpa_msg(wpa_s, MSG_INFO, "SME: Authentication request to the "
449 "driver failed");
450 wpas_connection_failed(wpa_s, bss->bssid);
451 wpa_supplicant_mark_disassoc(wpa_s);
452 wpabuf_free(resp);
453 wpas_connect_work_done(wpa_s);
454 return;
455 }
456
457 eloop_register_timeout(SME_AUTH_TIMEOUT, 0, sme_auth_timer, wpa_s,
458 NULL);
459
460 /*
461 * Association will be started based on the authentication event from
462 * the driver.
463 */
464
465 wpabuf_free(resp);
466 }
467
468
469 static void sme_auth_start_cb(struct wpa_radio_work *work, int deinit)
470 {
471 struct wpa_connect_work *cwork = work->ctx;
472 struct wpa_supplicant *wpa_s = work->wpa_s;
473
474 if (deinit) {
475 if (work->started)
476 wpa_s->connect_work = NULL;
477
478 wpas_connect_work_free(cwork);
479 return;
480 }
481
482 wpa_s->connect_work = work;
483
484 if (!wpas_valid_bss_ssid(wpa_s, cwork->bss, cwork->ssid)) {
485 wpa_dbg(wpa_s, MSG_DEBUG, "SME: BSS/SSID entry for authentication not valid anymore - drop connection attempt");
486 wpas_connect_work_done(wpa_s);
487 return;
488 }
489
490 sme_send_authentication(wpa_s, cwork->bss, cwork->ssid, 1);
491 }
492
493
494 void sme_authenticate(struct wpa_supplicant *wpa_s,
495 struct wpa_bss *bss, struct wpa_ssid *ssid)
496 {
497 struct wpa_connect_work *cwork;
498
499 if (bss == NULL || ssid == NULL)
500 return;
501 if (wpa_s->connect_work) {
502 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Reject sme_authenticate() call since connect_work exist");
503 return;
504 }
505
506 if (radio_work_pending(wpa_s, "sme-connect")) {
507 /*
508 * The previous sme-connect work might no longer be valid due to
509 * the fact that the BSS list was updated. In addition, it makes
510 * sense to adhere to the 'newer' decision.
511 */
512 wpa_dbg(wpa_s, MSG_DEBUG,
513 "SME: Remove previous pending sme-connect");
514 radio_remove_works(wpa_s, "sme-connect", 0);
515 }
516
517 cwork = os_zalloc(sizeof(*cwork));
518 if (cwork == NULL)
519 return;
520 cwork->bss = bss;
521 cwork->ssid = ssid;
522 cwork->sme = 1;
523
524 #ifdef CONFIG_SAE
525 wpa_s->sme.sae.state = SAE_NOTHING;
526 wpa_s->sme.sae.send_confirm = 0;
527 wpa_s->sme.sae_group_index = 0;
528 #endif /* CONFIG_SAE */
529
530 if (radio_add_work(wpa_s, bss->freq, "sme-connect", 1,
531 sme_auth_start_cb, cwork) < 0)
532 wpas_connect_work_free(cwork);
533 }
534
535
536 #ifdef CONFIG_SAE
537
538 static int sme_sae_auth(struct wpa_supplicant *wpa_s, u16 auth_transaction,
539 u16 status_code, const u8 *data, size_t len)
540 {
541 wpa_dbg(wpa_s, MSG_DEBUG, "SME: SAE authentication transaction %u "
542 "status code %u", auth_transaction, status_code);
543
544 if (auth_transaction == 1 &&
545 status_code == WLAN_STATUS_ANTI_CLOGGING_TOKEN_REQ &&
546 wpa_s->sme.sae.state == SAE_COMMITTED &&
547 wpa_s->current_bss && wpa_s->current_ssid) {
548 wpa_dbg(wpa_s, MSG_DEBUG, "SME: SAE anti-clogging token "
549 "requested");
550 wpabuf_free(wpa_s->sme.sae_token);
551 wpa_s->sme.sae_token = wpabuf_alloc_copy(data, len);
552 sme_send_authentication(wpa_s, wpa_s->current_bss,
553 wpa_s->current_ssid, 1);
554 return 0;
555 }
556
557 if (auth_transaction == 1 &&
558 status_code == WLAN_STATUS_FINITE_CYCLIC_GROUP_NOT_SUPPORTED &&
559 wpa_s->sme.sae.state == SAE_COMMITTED &&
560 wpa_s->current_bss && wpa_s->current_ssid) {
561 wpa_dbg(wpa_s, MSG_DEBUG, "SME: SAE group not supported");
562 wpa_s->sme.sae_group_index++;
563 if (sme_set_sae_group(wpa_s) < 0)
564 return -1; /* no other groups enabled */
565 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Try next enabled SAE group");
566 sme_send_authentication(wpa_s, wpa_s->current_bss,
567 wpa_s->current_ssid, 1);
568 return 0;
569 }
570
571 if (status_code != WLAN_STATUS_SUCCESS)
572 return -1;
573
574 if (auth_transaction == 1) {
575 int *groups = wpa_s->conf->sae_groups;
576
577 wpa_dbg(wpa_s, MSG_DEBUG, "SME SAE commit");
578 if (wpa_s->current_bss == NULL ||
579 wpa_s->current_ssid == NULL)
580 return -1;
581 if (wpa_s->sme.sae.state != SAE_COMMITTED)
582 return -1;
583 if (groups && groups[0] <= 0)
584 groups = NULL;
585 if (sae_parse_commit(&wpa_s->sme.sae, data, len, NULL, NULL,
586 groups) != WLAN_STATUS_SUCCESS)
587 return -1;
588
589 if (sae_process_commit(&wpa_s->sme.sae) < 0) {
590 wpa_printf(MSG_DEBUG, "SAE: Failed to process peer "
591 "commit");
592 return -1;
593 }
594
595 wpabuf_free(wpa_s->sme.sae_token);
596 wpa_s->sme.sae_token = NULL;
597 sme_send_authentication(wpa_s, wpa_s->current_bss,
598 wpa_s->current_ssid, 0);
599 return 0;
600 } else if (auth_transaction == 2) {
601 wpa_dbg(wpa_s, MSG_DEBUG, "SME SAE confirm");
602 if (wpa_s->sme.sae.state != SAE_CONFIRMED)
603 return -1;
604 if (sae_check_confirm(&wpa_s->sme.sae, data, len) < 0)
605 return -1;
606 wpa_s->sme.sae.state = SAE_ACCEPTED;
607 sae_clear_temp_data(&wpa_s->sme.sae);
608 return 1;
609 }
610
611 return -1;
612 }
613 #endif /* CONFIG_SAE */
614
615
616 void sme_event_auth(struct wpa_supplicant *wpa_s, union wpa_event_data *data)
617 {
618 struct wpa_ssid *ssid = wpa_s->current_ssid;
619
620 if (ssid == NULL) {
621 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Ignore authentication event "
622 "when network is not selected");
623 return;
624 }
625
626 if (wpa_s->wpa_state != WPA_AUTHENTICATING) {
627 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Ignore authentication event "
628 "when not in authenticating state");
629 return;
630 }
631
632 if (os_memcmp(wpa_s->pending_bssid, data->auth.peer, ETH_ALEN) != 0) {
633 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Ignore authentication with "
634 "unexpected peer " MACSTR,
635 MAC2STR(data->auth.peer));
636 return;
637 }
638
639 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Authentication response: peer=" MACSTR
640 " auth_type=%d auth_transaction=%d status_code=%d",
641 MAC2STR(data->auth.peer), data->auth.auth_type,
642 data->auth.auth_transaction, data->auth.status_code);
643 wpa_hexdump(MSG_MSGDUMP, "SME: Authentication response IEs",
644 data->auth.ies, data->auth.ies_len);
645
646 eloop_cancel_timeout(sme_auth_timer, wpa_s, NULL);
647
648 #ifdef CONFIG_SAE
649 if (data->auth.auth_type == WLAN_AUTH_SAE) {
650 int res;
651 res = sme_sae_auth(wpa_s, data->auth.auth_transaction,
652 data->auth.status_code, data->auth.ies,
653 data->auth.ies_len);
654 if (res < 0) {
655 wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
656 wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED);
657
658 }
659 if (res != 1)
660 return;
661
662 wpa_printf(MSG_DEBUG, "SME: SAE completed - setting PMK for "
663 "4-way handshake");
664 wpa_sm_set_pmk(wpa_s->wpa, wpa_s->sme.sae.pmk, PMK_LEN);
665 }
666 #endif /* CONFIG_SAE */
667
668 if (data->auth.status_code != WLAN_STATUS_SUCCESS) {
669 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Authentication failed (status "
670 "code %d)", data->auth.status_code);
671
672 if (data->auth.status_code !=
673 WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG ||
674 wpa_s->sme.auth_alg == data->auth.auth_type ||
675 wpa_s->current_ssid->auth_alg == WPA_AUTH_ALG_LEAP) {
676 wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
677 wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED);
678 return;
679 }
680
681 wpas_connect_work_done(wpa_s);
682
683 switch (data->auth.auth_type) {
684 case WLAN_AUTH_OPEN:
685 wpa_s->current_ssid->auth_alg = WPA_AUTH_ALG_SHARED;
686
687 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Trying SHARED auth");
688 wpa_supplicant_associate(wpa_s, wpa_s->current_bss,
689 wpa_s->current_ssid);
690 return;
691
692 case WLAN_AUTH_SHARED_KEY:
693 wpa_s->current_ssid->auth_alg = WPA_AUTH_ALG_LEAP;
694
695 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Trying LEAP auth");
696 wpa_supplicant_associate(wpa_s, wpa_s->current_bss,
697 wpa_s->current_ssid);
698 return;
699
700 default:
701 return;
702 }
703 }
704
705 #ifdef CONFIG_IEEE80211R
706 if (data->auth.auth_type == WLAN_AUTH_FT) {
707 union wpa_event_data edata;
708 os_memset(&edata, 0, sizeof(edata));
709 edata.ft_ies.ies = data->auth.ies;
710 edata.ft_ies.ies_len = data->auth.ies_len;
711 os_memcpy(edata.ft_ies.target_ap, data->auth.peer, ETH_ALEN);
712 wpa_supplicant_event(wpa_s, EVENT_FT_RESPONSE, &edata);
713 }
714 #endif /* CONFIG_IEEE80211R */
715
716 sme_associate(wpa_s, ssid->mode, data->auth.peer,
717 data->auth.auth_type);
718 }
719
720
721 void sme_associate(struct wpa_supplicant *wpa_s, enum wpas_mode mode,
722 const u8 *bssid, u16 auth_type)
723 {
724 struct wpa_driver_associate_params params;
725 struct ieee802_11_elems elems;
726 #ifdef CONFIG_HT_OVERRIDES
727 struct ieee80211_ht_capabilities htcaps;
728 struct ieee80211_ht_capabilities htcaps_mask;
729 #endif /* CONFIG_HT_OVERRIDES */
730 #ifdef CONFIG_VHT_OVERRIDES
731 struct ieee80211_vht_capabilities vhtcaps;
732 struct ieee80211_vht_capabilities vhtcaps_mask;
733 #endif /* CONFIG_VHT_OVERRIDES */
734
735 os_memset(&params, 0, sizeof(params));
736 params.bssid = bssid;
737 params.ssid = wpa_s->sme.ssid;
738 params.ssid_len = wpa_s->sme.ssid_len;
739 params.freq = wpa_s->sme.freq;
740 params.bg_scan_period = wpa_s->current_ssid ?
741 wpa_s->current_ssid->bg_scan_period : -1;
742 params.wpa_ie = wpa_s->sme.assoc_req_ie_len ?
743 wpa_s->sme.assoc_req_ie : NULL;
744 params.wpa_ie_len = wpa_s->sme.assoc_req_ie_len;
745 params.pairwise_suite = wpa_s->pairwise_cipher;
746 params.group_suite = wpa_s->group_cipher;
747 params.key_mgmt_suite = wpa_s->key_mgmt;
748 params.wpa_proto = wpa_s->wpa_proto;
749 #ifdef CONFIG_HT_OVERRIDES
750 os_memset(&htcaps, 0, sizeof(htcaps));
751 os_memset(&htcaps_mask, 0, sizeof(htcaps_mask));
752 params.htcaps = (u8 *) &htcaps;
753 params.htcaps_mask = (u8 *) &htcaps_mask;
754 wpa_supplicant_apply_ht_overrides(wpa_s, wpa_s->current_ssid, &params);
755 #endif /* CONFIG_HT_OVERRIDES */
756 #ifdef CONFIG_VHT_OVERRIDES
757 os_memset(&vhtcaps, 0, sizeof(vhtcaps));
758 os_memset(&vhtcaps_mask, 0, sizeof(vhtcaps_mask));
759 params.vhtcaps = &vhtcaps;
760 params.vhtcaps_mask = &vhtcaps_mask;
761 wpa_supplicant_apply_vht_overrides(wpa_s, wpa_s->current_ssid, &params);
762 #endif /* CONFIG_VHT_OVERRIDES */
763 #ifdef CONFIG_IEEE80211R
764 if (auth_type == WLAN_AUTH_FT && wpa_s->sme.ft_ies) {
765 params.wpa_ie = wpa_s->sme.ft_ies;
766 params.wpa_ie_len = wpa_s->sme.ft_ies_len;
767 }
768 #endif /* CONFIG_IEEE80211R */
769 params.mode = mode;
770 params.mgmt_frame_protection = wpa_s->sme.mfp;
771 if (wpa_s->sme.prev_bssid_set)
772 params.prev_bssid = wpa_s->sme.prev_bssid;
773
774 wpa_msg(wpa_s, MSG_INFO, "Trying to associate with " MACSTR
775 " (SSID='%s' freq=%d MHz)", MAC2STR(params.bssid),
776 params.ssid ? wpa_ssid_txt(params.ssid, params.ssid_len) : "",
777 params.freq);
778
779 wpa_supplicant_set_state(wpa_s, WPA_ASSOCIATING);
780
781 if (params.wpa_ie == NULL ||
782 ieee802_11_parse_elems(params.wpa_ie, params.wpa_ie_len, &elems, 0)
783 < 0) {
784 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Could not parse own IEs?!");
785 os_memset(&elems, 0, sizeof(elems));
786 }
787 if (elems.rsn_ie) {
788 params.wpa_proto = WPA_PROTO_RSN;
789 wpa_sm_set_assoc_wpa_ie(wpa_s->wpa, elems.rsn_ie - 2,
790 elems.rsn_ie_len + 2);
791 } else if (elems.wpa_ie) {
792 params.wpa_proto = WPA_PROTO_WPA;
793 wpa_sm_set_assoc_wpa_ie(wpa_s->wpa, elems.wpa_ie - 2,
794 elems.wpa_ie_len + 2);
795 } else if (elems.osen) {
796 params.wpa_proto = WPA_PROTO_OSEN;
797 wpa_sm_set_assoc_wpa_ie(wpa_s->wpa, elems.osen - 2,
798 elems.osen_len + 2);
799 } else
800 wpa_sm_set_assoc_wpa_ie(wpa_s->wpa, NULL, 0);
801 if (wpa_s->current_ssid && wpa_s->current_ssid->p2p_group)
802 params.p2p = 1;
803
804 if (wpa_s->parent->set_sta_uapsd)
805 params.uapsd = wpa_s->parent->sta_uapsd;
806 else
807 params.uapsd = -1;
808
809 if (wpa_drv_associate(wpa_s, &params) < 0) {
810 wpa_msg(wpa_s, MSG_INFO, "SME: Association request to the "
811 "driver failed");
812 wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
813 wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED);
814 os_memset(wpa_s->pending_bssid, 0, ETH_ALEN);
815 return;
816 }
817
818 eloop_register_timeout(SME_ASSOC_TIMEOUT, 0, sme_assoc_timer, wpa_s,
819 NULL);
820 }
821
822
823 int sme_update_ft_ies(struct wpa_supplicant *wpa_s, const u8 *md,
824 const u8 *ies, size_t ies_len)
825 {
826 if (md == NULL || ies == NULL) {
827 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Remove mobility domain");
828 os_free(wpa_s->sme.ft_ies);
829 wpa_s->sme.ft_ies = NULL;
830 wpa_s->sme.ft_ies_len = 0;
831 wpa_s->sme.ft_used = 0;
832 return 0;
833 }
834
835 os_memcpy(wpa_s->sme.mobility_domain, md, MOBILITY_DOMAIN_ID_LEN);
836 wpa_hexdump(MSG_DEBUG, "SME: FT IEs", ies, ies_len);
837 os_free(wpa_s->sme.ft_ies);
838 wpa_s->sme.ft_ies = os_malloc(ies_len);
839 if (wpa_s->sme.ft_ies == NULL)
840 return -1;
841 os_memcpy(wpa_s->sme.ft_ies, ies, ies_len);
842 wpa_s->sme.ft_ies_len = ies_len;
843 return 0;
844 }
845
846
847 static void sme_deauth(struct wpa_supplicant *wpa_s)
848 {
849 int bssid_changed;
850
851 bssid_changed = !is_zero_ether_addr(wpa_s->bssid);
852
853 if (wpa_drv_deauthenticate(wpa_s, wpa_s->pending_bssid,
854 WLAN_REASON_DEAUTH_LEAVING) < 0) {
855 wpa_msg(wpa_s, MSG_INFO, "SME: Deauth request to the driver "
856 "failed");
857 }
858 wpa_s->sme.prev_bssid_set = 0;
859
860 wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
861 wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED);
862 os_memset(wpa_s->bssid, 0, ETH_ALEN);
863 os_memset(wpa_s->pending_bssid, 0, ETH_ALEN);
864 if (bssid_changed)
865 wpas_notify_bssid_changed(wpa_s);
866 }
867
868
869 void sme_event_assoc_reject(struct wpa_supplicant *wpa_s,
870 union wpa_event_data *data)
871 {
872 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Association with " MACSTR " failed: "
873 "status code %d", MAC2STR(wpa_s->pending_bssid),
874 data->assoc_reject.status_code);
875
876 eloop_cancel_timeout(sme_assoc_timer, wpa_s, NULL);
877
878 /*
879 * For now, unconditionally terminate the previous authentication. In
880 * theory, this should not be needed, but mac80211 gets quite confused
881 * if the authentication is left pending.. Some roaming cases might
882 * benefit from using the previous authentication, so this could be
883 * optimized in the future.
884 */
885 sme_deauth(wpa_s);
886 }
887
888
889 void sme_event_auth_timed_out(struct wpa_supplicant *wpa_s,
890 union wpa_event_data *data)
891 {
892 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Authentication timed out");
893 wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
894 wpa_supplicant_mark_disassoc(wpa_s);
895 }
896
897
898 void sme_event_assoc_timed_out(struct wpa_supplicant *wpa_s,
899 union wpa_event_data *data)
900 {
901 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Association timed out");
902 wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
903 wpa_supplicant_mark_disassoc(wpa_s);
904 }
905
906
907 void sme_event_disassoc(struct wpa_supplicant *wpa_s,
908 struct disassoc_info *info)
909 {
910 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Disassociation event received");
911 if (wpa_s->sme.prev_bssid_set) {
912 /*
913 * cfg80211/mac80211 can get into somewhat confused state if
914 * the AP only disassociates us and leaves us in authenticated
915 * state. For now, force the state to be cleared to avoid
916 * confusing errors if we try to associate with the AP again.
917 */
918 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Deauthenticate to clear "
919 "driver state");
920 wpa_drv_deauthenticate(wpa_s, wpa_s->sme.prev_bssid,
921 WLAN_REASON_DEAUTH_LEAVING);
922 }
923 }
924
925
926 static void sme_auth_timer(void *eloop_ctx, void *timeout_ctx)
927 {
928 struct wpa_supplicant *wpa_s = eloop_ctx;
929 if (wpa_s->wpa_state == WPA_AUTHENTICATING) {
930 wpa_msg(wpa_s, MSG_DEBUG, "SME: Authentication timeout");
931 sme_deauth(wpa_s);
932 }
933 }
934
935
936 static void sme_assoc_timer(void *eloop_ctx, void *timeout_ctx)
937 {
938 struct wpa_supplicant *wpa_s = eloop_ctx;
939 if (wpa_s->wpa_state == WPA_ASSOCIATING) {
940 wpa_msg(wpa_s, MSG_DEBUG, "SME: Association timeout");
941 sme_deauth(wpa_s);
942 }
943 }
944
945
946 void sme_state_changed(struct wpa_supplicant *wpa_s)
947 {
948 /* Make sure timers are cleaned up appropriately. */
949 if (wpa_s->wpa_state != WPA_ASSOCIATING)
950 eloop_cancel_timeout(sme_assoc_timer, wpa_s, NULL);
951 if (wpa_s->wpa_state != WPA_AUTHENTICATING)
952 eloop_cancel_timeout(sme_auth_timer, wpa_s, NULL);
953 }
954
955
956 void sme_disassoc_while_authenticating(struct wpa_supplicant *wpa_s,
957 const u8 *prev_pending_bssid)
958 {
959 /*
960 * mac80211-workaround to force deauth on failed auth cmd,
961 * requires us to remain in authenticating state to allow the
962 * second authentication attempt to be continued properly.
963 */
964 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Allow pending authentication "
965 "to proceed after disconnection event");
966 wpa_supplicant_set_state(wpa_s, WPA_AUTHENTICATING);
967 os_memcpy(wpa_s->pending_bssid, prev_pending_bssid, ETH_ALEN);
968
969 /*
970 * Re-arm authentication timer in case auth fails for whatever reason.
971 */
972 eloop_cancel_timeout(sme_auth_timer, wpa_s, NULL);
973 eloop_register_timeout(SME_AUTH_TIMEOUT, 0, sme_auth_timer, wpa_s,
974 NULL);
975 }
976
977
978 void sme_deinit(struct wpa_supplicant *wpa_s)
979 {
980 os_free(wpa_s->sme.ft_ies);
981 wpa_s->sme.ft_ies = NULL;
982 wpa_s->sme.ft_ies_len = 0;
983 #ifdef CONFIG_IEEE80211W
984 sme_stop_sa_query(wpa_s);
985 #endif /* CONFIG_IEEE80211W */
986 #ifdef CONFIG_SAE
987 wpabuf_free(wpa_s->sme.sae_token);
988 wpa_s->sme.sae_token = NULL;
989 sae_clear_data(&wpa_s->sme.sae);
990 #endif /* CONFIG_SAE */
991
992 eloop_cancel_timeout(sme_assoc_timer, wpa_s, NULL);
993 eloop_cancel_timeout(sme_auth_timer, wpa_s, NULL);
994 eloop_cancel_timeout(sme_obss_scan_timeout, wpa_s, NULL);
995 }
996
997
998 static void sme_send_2040_bss_coex(struct wpa_supplicant *wpa_s,
999 const u8 *chan_list, u8 num_channels,
1000 u8 num_intol)
1001 {
1002 struct ieee80211_2040_bss_coex_ie *bc_ie;
1003 struct ieee80211_2040_intol_chan_report *ic_report;
1004 struct wpabuf *buf;
1005
1006 wpa_printf(MSG_DEBUG, "SME: Send 20/40 BSS Coexistence to " MACSTR
1007 " (num_channels=%u num_intol=%u)",
1008 MAC2STR(wpa_s->bssid), num_channels, num_intol);
1009 wpa_hexdump(MSG_DEBUG, "SME: 20/40 BSS Intolerant Channels",
1010 chan_list, num_channels);
1011
1012 buf = wpabuf_alloc(2 + /* action.category + action_code */
1013 sizeof(struct ieee80211_2040_bss_coex_ie) +
1014 sizeof(struct ieee80211_2040_intol_chan_report) +
1015 num_channels);
1016 if (buf == NULL)
1017 return;
1018
1019 wpabuf_put_u8(buf, WLAN_ACTION_PUBLIC);
1020 wpabuf_put_u8(buf, WLAN_PA_20_40_BSS_COEX);
1021
1022 bc_ie = wpabuf_put(buf, sizeof(*bc_ie));
1023 bc_ie->element_id = WLAN_EID_20_40_BSS_COEXISTENCE;
1024 bc_ie->length = 1;
1025 if (num_intol)
1026 bc_ie->coex_param |= WLAN_20_40_BSS_COEX_20MHZ_WIDTH_REQ;
1027
1028 if (num_channels > 0) {
1029 ic_report = wpabuf_put(buf, sizeof(*ic_report));
1030 ic_report->element_id = WLAN_EID_20_40_BSS_INTOLERANT;
1031 ic_report->length = num_channels + 1;
1032 ic_report->op_class = 0;
1033 os_memcpy(wpabuf_put(buf, num_channels), chan_list,
1034 num_channels);
1035 }
1036
1037 if (wpa_drv_send_action(wpa_s, wpa_s->assoc_freq, 0, wpa_s->bssid,
1038 wpa_s->own_addr, wpa_s->bssid,
1039 wpabuf_head(buf), wpabuf_len(buf), 0) < 0) {
1040 wpa_msg(wpa_s, MSG_INFO,
1041 "SME: Failed to send 20/40 BSS Coexistence frame");
1042 }
1043
1044 wpabuf_free(buf);
1045 }
1046
1047
1048 int sme_proc_obss_scan(struct wpa_supplicant *wpa_s)
1049 {
1050 struct wpa_bss *bss;
1051 const u8 *ie;
1052 u16 ht_cap;
1053 u8 chan_list[P2P_MAX_CHANNELS], channel;
1054 u8 num_channels = 0, num_intol = 0, i;
1055
1056 if (!wpa_s->sme.sched_obss_scan)
1057 return 0;
1058
1059 wpa_s->sme.sched_obss_scan = 0;
1060 if (!wpa_s->current_bss || wpa_s->wpa_state != WPA_COMPLETED)
1061 return 1;
1062
1063 /*
1064 * Check whether AP uses regulatory triplet or channel triplet in
1065 * country info. Right now the operating class of the BSS channel
1066 * width trigger event is "unknown" (IEEE Std 802.11-2012 10.15.12),
1067 * based on the assumption that operating class triplet is not used in
1068 * beacon frame. If the First Channel Number/Operating Extension
1069 * Identifier octet has a positive integer value of 201 or greater,
1070 * then its operating class triplet.
1071 *
1072 * TODO: If Supported Operating Classes element is present in beacon
1073 * frame, have to lookup operating class in Annex E and fill them in
1074 * 2040 coex frame.
1075 */
1076 ie = wpa_bss_get_ie(wpa_s->current_bss, WLAN_EID_COUNTRY);
1077 if (ie && (ie[1] >= 6) && (ie[5] >= 201))
1078 return 1;
1079
1080 os_memset(chan_list, 0, sizeof(chan_list));
1081
1082 dl_list_for_each(bss, &wpa_s->bss, struct wpa_bss, list) {
1083 /* Skip other band bss */
1084 enum hostapd_hw_mode mode;
1085 mode = ieee80211_freq_to_chan(bss->freq, &channel);
1086 if (mode != HOSTAPD_MODE_IEEE80211G &&
1087 mode != HOSTAPD_MODE_IEEE80211B)
1088 continue;
1089
1090 ie = wpa_bss_get_ie(bss, WLAN_EID_HT_CAP);
1091 ht_cap = (ie && (ie[1] == 26)) ? WPA_GET_LE16(ie + 2) : 0;
1092 wpa_printf(MSG_DEBUG, "SME OBSS scan BSS " MACSTR
1093 " freq=%u chan=%u ht_cap=0x%x",
1094 MAC2STR(bss->bssid), bss->freq, channel, ht_cap);
1095
1096 if (!ht_cap || (ht_cap & HT_CAP_INFO_40MHZ_INTOLERANT)) {
1097 if (ht_cap & HT_CAP_INFO_40MHZ_INTOLERANT)
1098 num_intol++;
1099
1100 /* Check whether the channel is already considered */
1101 for (i = 0; i < num_channels; i++) {
1102 if (channel == chan_list[i])
1103 break;
1104 }
1105 if (i != num_channels)
1106 continue;
1107
1108 chan_list[num_channels++] = channel;
1109 }
1110 }
1111
1112 sme_send_2040_bss_coex(wpa_s, chan_list, num_channels, num_intol);
1113 return 1;
1114 }
1115
1116
1117 static struct hostapd_hw_modes * get_mode(struct hostapd_hw_modes *modes,
1118 u16 num_modes,
1119 enum hostapd_hw_mode mode)
1120 {
1121 u16 i;
1122
1123 for (i = 0; i < num_modes; i++) {
1124 if (modes[i].mode == mode)
1125 return &modes[i];
1126 }
1127
1128 return NULL;
1129 }
1130
1131
1132 static void wpa_setband_scan_freqs_list(struct wpa_supplicant *wpa_s,
1133 enum hostapd_hw_mode band,
1134 struct wpa_driver_scan_params *params)
1135 {
1136 /* Include only supported channels for the specified band */
1137 struct hostapd_hw_modes *mode;
1138 int count, i;
1139
1140 mode = get_mode(wpa_s->hw.modes, wpa_s->hw.num_modes, band);
1141 if (mode == NULL) {
1142 /* No channels supported in this band - use empty list */
1143 params->freqs = os_zalloc(sizeof(int));
1144 return;
1145 }
1146
1147 params->freqs = os_calloc(mode->num_channels + 1, sizeof(int));
1148 if (params->freqs == NULL)
1149 return;
1150 for (count = 0, i = 0; i < mode->num_channels; i++) {
1151 if (mode->channels[i].flag & HOSTAPD_CHAN_DISABLED)
1152 continue;
1153 params->freqs[count++] = mode->channels[i].freq;
1154 }
1155 }
1156
1157
1158 static void sme_obss_scan_timeout(void *eloop_ctx, void *timeout_ctx)
1159 {
1160 struct wpa_supplicant *wpa_s = eloop_ctx;
1161 struct wpa_driver_scan_params params;
1162
1163 if (!wpa_s->current_bss) {
1164 wpa_printf(MSG_DEBUG, "SME OBSS: Ignore scan request");
1165 return;
1166 }
1167
1168 os_memset(&params, 0, sizeof(params));
1169 wpa_setband_scan_freqs_list(wpa_s, HOSTAPD_MODE_IEEE80211G, &params);
1170 wpa_printf(MSG_DEBUG, "SME OBSS: Request an OBSS scan");
1171
1172 if (wpa_supplicant_trigger_scan(wpa_s, &params))
1173 wpa_printf(MSG_DEBUG, "SME OBSS: Failed to trigger scan");
1174 else
1175 wpa_s->sme.sched_obss_scan = 1;
1176 os_free(params.freqs);
1177
1178 eloop_register_timeout(wpa_s->sme.obss_scan_int, 0,
1179 sme_obss_scan_timeout, wpa_s, NULL);
1180 }
1181
1182
1183 void sme_sched_obss_scan(struct wpa_supplicant *wpa_s, int enable)
1184 {
1185 const u8 *ie;
1186 struct wpa_bss *bss = wpa_s->current_bss;
1187 struct wpa_ssid *ssid = wpa_s->current_ssid;
1188 struct hostapd_hw_modes *hw_mode = NULL;
1189 int i;
1190
1191 eloop_cancel_timeout(sme_obss_scan_timeout, wpa_s, NULL);
1192 wpa_s->sme.sched_obss_scan = 0;
1193 if (!enable)
1194 return;
1195
1196 /*
1197 * Schedule OBSS scan if driver is using station SME in wpa_supplicant
1198 * or it expects OBSS scan to be performed by wpa_supplicant.
1199 */
1200 if (!((wpa_s->drv_flags & WPA_DRIVER_FLAGS_SME) ||
1201 (wpa_s->drv_flags & WPA_DRIVER_FLAGS_OBSS_SCAN)) ||
1202 ssid == NULL || ssid->mode != IEEE80211_MODE_INFRA)
1203 return;
1204
1205 if (!wpa_s->hw.modes)
1206 return;
1207
1208 /* only HT caps in 11g mode are relevant */
1209 for (i = 0; i < wpa_s->hw.num_modes; i++) {
1210 hw_mode = &wpa_s->hw.modes[i];
1211 if (hw_mode->mode == HOSTAPD_MODE_IEEE80211G)
1212 break;
1213 }
1214
1215 /* Driver does not support HT40 for 11g or doesn't have 11g. */
1216 if (i == wpa_s->hw.num_modes || !hw_mode ||
1217 !(hw_mode->ht_capab & HT_CAP_INFO_SUPP_CHANNEL_WIDTH_SET))
1218 return;
1219
1220 if (bss == NULL || bss->freq < 2400 || bss->freq > 2500)
1221 return; /* Not associated on 2.4 GHz band */
1222
1223 /* Check whether AP supports HT40 */
1224 ie = wpa_bss_get_ie(wpa_s->current_bss, WLAN_EID_HT_CAP);
1225 if (!ie || ie[1] < 2 ||
1226 !(WPA_GET_LE16(ie + 2) & HT_CAP_INFO_SUPP_CHANNEL_WIDTH_SET))
1227 return; /* AP does not support HT40 */
1228
1229 ie = wpa_bss_get_ie(wpa_s->current_bss,
1230 WLAN_EID_OVERLAPPING_BSS_SCAN_PARAMS);
1231 if (!ie || ie[1] < 14)
1232 return; /* AP does not request OBSS scans */
1233
1234 wpa_s->sme.obss_scan_int = WPA_GET_LE16(ie + 6);
1235 if (wpa_s->sme.obss_scan_int < 10) {
1236 wpa_printf(MSG_DEBUG, "SME: Invalid OBSS Scan Interval %u "
1237 "replaced with the minimum 10 sec",
1238 wpa_s->sme.obss_scan_int);
1239 wpa_s->sme.obss_scan_int = 10;
1240 }
1241 wpa_printf(MSG_DEBUG, "SME: OBSS Scan Interval %u sec",
1242 wpa_s->sme.obss_scan_int);
1243 eloop_register_timeout(wpa_s->sme.obss_scan_int, 0,
1244 sme_obss_scan_timeout, wpa_s, NULL);
1245 }
1246
1247
1248 #ifdef CONFIG_IEEE80211W
1249
1250 static const unsigned int sa_query_max_timeout = 1000;
1251 static const unsigned int sa_query_retry_timeout = 201;
1252
1253 static int sme_check_sa_query_timeout(struct wpa_supplicant *wpa_s)
1254 {
1255 u32 tu;
1256 struct os_reltime now, passed;
1257 os_get_reltime(&now);
1258 os_reltime_sub(&now, &wpa_s->sme.sa_query_start, &passed);
1259 tu = (passed.sec * 1000000 + passed.usec) / 1024;
1260 if (sa_query_max_timeout < tu) {
1261 wpa_dbg(wpa_s, MSG_DEBUG, "SME: SA Query timed out");
1262 sme_stop_sa_query(wpa_s);
1263 wpa_supplicant_deauthenticate(
1264 wpa_s, WLAN_REASON_PREV_AUTH_NOT_VALID);
1265 return 1;
1266 }
1267
1268 return 0;
1269 }
1270
1271
1272 static void sme_send_sa_query_req(struct wpa_supplicant *wpa_s,
1273 const u8 *trans_id)
1274 {
1275 u8 req[2 + WLAN_SA_QUERY_TR_ID_LEN];
1276 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Sending SA Query Request to "
1277 MACSTR, MAC2STR(wpa_s->bssid));
1278 wpa_hexdump(MSG_DEBUG, "SME: SA Query Transaction ID",
1279 trans_id, WLAN_SA_QUERY_TR_ID_LEN);
1280 req[0] = WLAN_ACTION_SA_QUERY;
1281 req[1] = WLAN_SA_QUERY_REQUEST;
1282 os_memcpy(req + 2, trans_id, WLAN_SA_QUERY_TR_ID_LEN);
1283 if (wpa_drv_send_action(wpa_s, wpa_s->assoc_freq, 0, wpa_s->bssid,
1284 wpa_s->own_addr, wpa_s->bssid,
1285 req, sizeof(req), 0) < 0)
1286 wpa_msg(wpa_s, MSG_INFO, "SME: Failed to send SA Query "
1287 "Request");
1288 }
1289
1290
1291 static void sme_sa_query_timer(void *eloop_ctx, void *timeout_ctx)
1292 {
1293 struct wpa_supplicant *wpa_s = eloop_ctx;
1294 unsigned int timeout, sec, usec;
1295 u8 *trans_id, *nbuf;
1296
1297 if (wpa_s->sme.sa_query_count > 0 &&
1298 sme_check_sa_query_timeout(wpa_s))
1299 return;
1300
1301 nbuf = os_realloc_array(wpa_s->sme.sa_query_trans_id,
1302 wpa_s->sme.sa_query_count + 1,
1303 WLAN_SA_QUERY_TR_ID_LEN);
1304 if (nbuf == NULL)
1305 return;
1306 if (wpa_s->sme.sa_query_count == 0) {
1307 /* Starting a new SA Query procedure */
1308 os_get_reltime(&wpa_s->sme.sa_query_start);
1309 }
1310 trans_id = nbuf + wpa_s->sme.sa_query_count * WLAN_SA_QUERY_TR_ID_LEN;
1311 wpa_s->sme.sa_query_trans_id = nbuf;
1312 wpa_s->sme.sa_query_count++;
1313
1314 os_get_random(trans_id, WLAN_SA_QUERY_TR_ID_LEN);
1315
1316 timeout = sa_query_retry_timeout;
1317 sec = ((timeout / 1000) * 1024) / 1000;
1318 usec = (timeout % 1000) * 1024;
1319 eloop_register_timeout(sec, usec, sme_sa_query_timer, wpa_s, NULL);
1320
1321 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Association SA Query attempt %d",
1322 wpa_s->sme.sa_query_count);
1323
1324 sme_send_sa_query_req(wpa_s, trans_id);
1325 }
1326
1327
1328 static void sme_start_sa_query(struct wpa_supplicant *wpa_s)
1329 {
1330 sme_sa_query_timer(wpa_s, NULL);
1331 }
1332
1333
1334 static void sme_stop_sa_query(struct wpa_supplicant *wpa_s)
1335 {
1336 eloop_cancel_timeout(sme_sa_query_timer, wpa_s, NULL);
1337 os_free(wpa_s->sme.sa_query_trans_id);
1338 wpa_s->sme.sa_query_trans_id = NULL;
1339 wpa_s->sme.sa_query_count = 0;
1340 }
1341
1342
1343 void sme_event_unprot_disconnect(struct wpa_supplicant *wpa_s, const u8 *sa,
1344 const u8 *da, u16 reason_code)
1345 {
1346 struct wpa_ssid *ssid;
1347
1348 if (wpa_s->wpa_state != WPA_COMPLETED)
1349 return;
1350 ssid = wpa_s->current_ssid;
1351 if (ssid == NULL ||
1352 (ssid->ieee80211w == MGMT_FRAME_PROTECTION_DEFAULT ?
1353 wpa_s->conf->pmf : ssid->ieee80211w) == NO_MGMT_FRAME_PROTECTION)
1354 return;
1355 if (os_memcmp(sa, wpa_s->bssid, ETH_ALEN) != 0)
1356 return;
1357 if (reason_code != WLAN_REASON_CLASS2_FRAME_FROM_NONAUTH_STA &&
1358 reason_code != WLAN_REASON_CLASS3_FRAME_FROM_NONASSOC_STA)
1359 return;
1360 if (wpa_s->sme.sa_query_count > 0)
1361 return;
1362
1363 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Unprotected disconnect dropped - "
1364 "possible AP/STA state mismatch - trigger SA Query");
1365 sme_start_sa_query(wpa_s);
1366 }
1367
1368
1369 void sme_sa_query_rx(struct wpa_supplicant *wpa_s, const u8 *sa,
1370 const u8 *data, size_t len)
1371 {
1372 int i;
1373
1374 if (wpa_s->sme.sa_query_trans_id == NULL ||
1375 len < 1 + WLAN_SA_QUERY_TR_ID_LEN ||
1376 data[0] != WLAN_SA_QUERY_RESPONSE)
1377 return;
1378 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Received SA Query response from "
1379 MACSTR " (trans_id %02x%02x)", MAC2STR(sa), data[1], data[2]);
1380
1381 if (os_memcmp(sa, wpa_s->bssid, ETH_ALEN) != 0)
1382 return;
1383
1384 for (i = 0; i < wpa_s->sme.sa_query_count; i++) {
1385 if (os_memcmp(wpa_s->sme.sa_query_trans_id +
1386 i * WLAN_SA_QUERY_TR_ID_LEN,
1387 data + 1, WLAN_SA_QUERY_TR_ID_LEN) == 0)
1388 break;
1389 }
1390
1391 if (i >= wpa_s->sme.sa_query_count) {
1392 wpa_dbg(wpa_s, MSG_DEBUG, "SME: No matching SA Query "
1393 "transaction identifier found");
1394 return;
1395 }
1396
1397 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Reply to pending SA Query received "
1398 "from " MACSTR, MAC2STR(sa));
1399 sme_stop_sa_query(wpa_s);
1400 }
1401
1402 #endif /* CONFIG_IEEE80211W */
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