1 /*
2 * wpa_supplicant - SME
3 * Copyright (c) 2009-2014, Jouni Malinen <j@w1.fi>
4 *
5 * This software may be distributed under the terms of the BSD license.
6 * See README for more details.
7 */
8
9 #include "includes.h"
10
11 #include "common.h"
12 #include "utils/eloop.h"
13 #include "common/ieee802_11_defs.h"
14 #include "common/ieee802_11_common.h"
15 #include "eapol_supp/eapol_supp_sm.h"
16 #include "common/wpa_common.h"
17 #include "common/sae.h"
18 #include "rsn_supp/wpa.h"
19 #include "rsn_supp/pmksa_cache.h"
20 #include "config.h"
21 #include "wpa_supplicant_i.h"
22 #include "driver_i.h"
23 #include "wpas_glue.h"
24 #include "wps_supplicant.h"
25 #include "p2p_supplicant.h"
26 #include "notify.h"
27 #include "bss.h"
28 #include "scan.h"
29 #include "sme.h"
30 #include "hs20_supplicant.h"
31
32 #define SME_AUTH_TIMEOUT 5
33 #define SME_ASSOC_TIMEOUT 5
34
35 static void sme_auth_timer(void *eloop_ctx, void *timeout_ctx);
36 static void sme_assoc_timer(void *eloop_ctx, void *timeout_ctx);
37 static void sme_obss_scan_timeout(void *eloop_ctx, void *timeout_ctx);
38 #ifdef CONFIG_IEEE80211W
39 static void sme_stop_sa_query(struct wpa_supplicant *wpa_s);
40 #endif /* CONFIG_IEEE80211W */
41
42
43 #ifdef CONFIG_SAE
44
index_within_array(const int * array,int idx)45 static int index_within_array(const int *array, int idx)
46 {
47 int i;
48 for (i = 0; i < idx; i++) {
49 if (array[i] <= 0)
50 return 0;
51 }
52 return 1;
53 }
54
55
sme_set_sae_group(struct wpa_supplicant * wpa_s)56 static int sme_set_sae_group(struct wpa_supplicant *wpa_s)
57 {
58 int *groups = wpa_s->conf->sae_groups;
59 int default_groups[] = { 19, 20, 21, 25, 26, 0 };
60
61 if (!groups || groups[0] <= 0)
62 groups = default_groups;
63
64 /* Configuration may have changed, so validate current index */
65 if (!index_within_array(groups, wpa_s->sme.sae_group_index))
66 return -1;
67
68 for (;;) {
69 int group = groups[wpa_s->sme.sae_group_index];
70 if (group < 0)
71 break;
72 if (sae_set_group(&wpa_s->sme.sae, group) == 0) {
73 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Selected SAE group %d",
74 wpa_s->sme.sae.group);
75 return 0;
76 }
77 wpa_s->sme.sae_group_index++;
78 }
79
80 return -1;
81 }
82
83
sme_auth_build_sae_commit(struct wpa_supplicant * wpa_s,struct wpa_ssid * ssid,const u8 * bssid)84 static struct wpabuf * sme_auth_build_sae_commit(struct wpa_supplicant *wpa_s,
85 struct wpa_ssid *ssid,
86 const u8 *bssid)
87 {
88 struct wpabuf *buf;
89 size_t len;
90
91 if (ssid->passphrase == NULL) {
92 wpa_printf(MSG_DEBUG, "SAE: No password available");
93 return NULL;
94 }
95
96 if (sme_set_sae_group(wpa_s) < 0) {
97 wpa_printf(MSG_DEBUG, "SAE: Failed to select group");
98 return NULL;
99 }
100
101 if (sae_prepare_commit(wpa_s->own_addr, bssid,
102 (u8 *) ssid->passphrase,
103 os_strlen(ssid->passphrase),
104 &wpa_s->sme.sae) < 0) {
105 wpa_printf(MSG_DEBUG, "SAE: Could not pick PWE");
106 return NULL;
107 }
108
109 len = wpa_s->sme.sae_token ? wpabuf_len(wpa_s->sme.sae_token) : 0;
110 buf = wpabuf_alloc(4 + SAE_COMMIT_MAX_LEN + len);
111 if (buf == NULL)
112 return NULL;
113
114 wpabuf_put_le16(buf, 1); /* Transaction seq# */
115 wpabuf_put_le16(buf, WLAN_STATUS_SUCCESS);
116 sae_write_commit(&wpa_s->sme.sae, buf, wpa_s->sme.sae_token);
117
118 return buf;
119 }
120
121
sme_auth_build_sae_confirm(struct wpa_supplicant * wpa_s)122 static struct wpabuf * sme_auth_build_sae_confirm(struct wpa_supplicant *wpa_s)
123 {
124 struct wpabuf *buf;
125
126 buf = wpabuf_alloc(4 + SAE_CONFIRM_MAX_LEN);
127 if (buf == NULL)
128 return NULL;
129
130 wpabuf_put_le16(buf, 2); /* Transaction seq# */
131 wpabuf_put_le16(buf, WLAN_STATUS_SUCCESS);
132 sae_write_confirm(&wpa_s->sme.sae, buf);
133
134 return buf;
135 }
136
137 #endif /* CONFIG_SAE */
138
139
sme_send_authentication(struct wpa_supplicant * wpa_s,struct wpa_bss * bss,struct wpa_ssid * ssid,int start)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(¶ms, 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 size_t len;
365
366 wpas_hs20_add_indication(hs20, pps_mo_id);
367 len = sizeof(wpa_s->sme.assoc_req_ie) -
368 wpa_s->sme.assoc_req_ie_len;
369 if (wpabuf_len(hs20) <= len) {
370 os_memcpy(wpa_s->sme.assoc_req_ie +
371 wpa_s->sme.assoc_req_ie_len,
372 wpabuf_head(hs20), wpabuf_len(hs20));
373 wpa_s->sme.assoc_req_ie_len += wpabuf_len(hs20);
374 }
375 wpabuf_free(hs20);
376 }
377 }
378 #endif /* CONFIG_HS20 */
379
380 ext_capab_len = wpas_build_ext_capab(wpa_s, ext_capab,
381 sizeof(ext_capab));
382 if (ext_capab_len > 0) {
383 u8 *pos = wpa_s->sme.assoc_req_ie;
384 if (wpa_s->sme.assoc_req_ie_len > 0 && pos[0] == WLAN_EID_RSN)
385 pos += 2 + pos[1];
386 os_memmove(pos + ext_capab_len, pos,
387 wpa_s->sme.assoc_req_ie_len -
388 (pos - wpa_s->sme.assoc_req_ie));
389 wpa_s->sme.assoc_req_ie_len += ext_capab_len;
390 os_memcpy(pos, ext_capab, ext_capab_len);
391 }
392
393 #ifdef CONFIG_SAE
394 if (params.auth_alg == WPA_AUTH_ALG_SAE) {
395 if (start)
396 resp = sme_auth_build_sae_commit(wpa_s, ssid,
397 bss->bssid);
398 else
399 resp = sme_auth_build_sae_confirm(wpa_s);
400 if (resp == NULL) {
401 wpas_connect_work_done(wpa_s);
402 return;
403 }
404 params.sae_data = wpabuf_head(resp);
405 params.sae_data_len = wpabuf_len(resp);
406 wpa_s->sme.sae.state = start ? SAE_COMMITTED : SAE_CONFIRMED;
407 }
408 #endif /* CONFIG_SAE */
409
410 wpa_supplicant_cancel_sched_scan(wpa_s);
411 wpa_supplicant_cancel_scan(wpa_s);
412
413 wpa_msg(wpa_s, MSG_INFO, "SME: Trying to authenticate with " MACSTR
414 " (SSID='%s' freq=%d MHz)", MAC2STR(params.bssid),
415 wpa_ssid_txt(params.ssid, params.ssid_len), params.freq);
416
417 wpa_clear_keys(wpa_s, bss->bssid);
418 wpa_supplicant_set_state(wpa_s, WPA_AUTHENTICATING);
419 old_ssid = wpa_s->current_ssid;
420 wpa_s->current_ssid = ssid;
421 wpa_supplicant_rsn_supp_set_config(wpa_s, wpa_s->current_ssid);
422 wpa_supplicant_initiate_eapol(wpa_s);
423 if (old_ssid != wpa_s->current_ssid)
424 wpas_notify_network_changed(wpa_s);
425
426 #ifdef CONFIG_P2P
427 /*
428 * If multi-channel concurrency is not supported, check for any
429 * frequency conflict. In case of any frequency conflict, remove the
430 * least prioritized connection.
431 */
432 if (wpa_s->num_multichan_concurrent < 2) {
433 int freq, num;
434 num = get_shared_radio_freqs(wpa_s, &freq, 1);
435 if (num > 0 && freq > 0 && freq != params.freq) {
436 wpa_printf(MSG_DEBUG,
437 "Conflicting frequency found (%d != %d)",
438 freq, params.freq);
439 if (wpas_p2p_handle_frequency_conflicts(wpa_s,
440 params.freq,
441 ssid) < 0) {
442 wpas_connection_failed(wpa_s, bss->bssid);
443 wpa_supplicant_mark_disassoc(wpa_s);
444 wpabuf_free(resp);
445 wpas_connect_work_done(wpa_s);
446 return;
447 }
448 }
449 }
450 #endif /* CONFIG_P2P */
451
452 wpa_s->sme.auth_alg = params.auth_alg;
453 if (wpa_drv_authenticate(wpa_s, ¶ms) < 0) {
454 wpa_msg(wpa_s, MSG_INFO, "SME: Authentication request to the "
455 "driver failed");
456 wpas_connection_failed(wpa_s, bss->bssid);
457 wpa_supplicant_mark_disassoc(wpa_s);
458 wpabuf_free(resp);
459 wpas_connect_work_done(wpa_s);
460 return;
461 }
462
463 eloop_register_timeout(SME_AUTH_TIMEOUT, 0, sme_auth_timer, wpa_s,
464 NULL);
465
466 /*
467 * Association will be started based on the authentication event from
468 * the driver.
469 */
470
471 wpabuf_free(resp);
472 }
473
474
sme_auth_start_cb(struct wpa_radio_work * work,int deinit)475 static void sme_auth_start_cb(struct wpa_radio_work *work, int deinit)
476 {
477 struct wpa_connect_work *cwork = work->ctx;
478 struct wpa_supplicant *wpa_s = work->wpa_s;
479
480 if (deinit) {
481 if (work->started)
482 wpa_s->connect_work = NULL;
483
484 wpas_connect_work_free(cwork);
485 return;
486 }
487
488 wpa_s->connect_work = work;
489
490 if (!wpas_valid_bss_ssid(wpa_s, cwork->bss, cwork->ssid)) {
491 wpa_dbg(wpa_s, MSG_DEBUG, "SME: BSS/SSID entry for authentication not valid anymore - drop connection attempt");
492 wpas_connect_work_done(wpa_s);
493 return;
494 }
495
496 sme_send_authentication(wpa_s, cwork->bss, cwork->ssid, 1);
497 }
498
499
sme_authenticate(struct wpa_supplicant * wpa_s,struct wpa_bss * bss,struct wpa_ssid * ssid)500 void sme_authenticate(struct wpa_supplicant *wpa_s,
501 struct wpa_bss *bss, struct wpa_ssid *ssid)
502 {
503 struct wpa_connect_work *cwork;
504
505 if (bss == NULL || ssid == NULL)
506 return;
507 if (wpa_s->connect_work) {
508 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Reject sme_authenticate() call since connect_work exist");
509 return;
510 }
511
512 if (radio_work_pending(wpa_s, "sme-connect")) {
513 /*
514 * The previous sme-connect work might no longer be valid due to
515 * the fact that the BSS list was updated. In addition, it makes
516 * sense to adhere to the 'newer' decision.
517 */
518 wpa_dbg(wpa_s, MSG_DEBUG,
519 "SME: Remove previous pending sme-connect");
520 radio_remove_works(wpa_s, "sme-connect", 0);
521 }
522
523 cwork = os_zalloc(sizeof(*cwork));
524 if (cwork == NULL)
525 return;
526 cwork->bss = bss;
527 cwork->ssid = ssid;
528 cwork->sme = 1;
529
530 #ifdef CONFIG_SAE
531 wpa_s->sme.sae.state = SAE_NOTHING;
532 wpa_s->sme.sae.send_confirm = 0;
533 wpa_s->sme.sae_group_index = 0;
534 #endif /* CONFIG_SAE */
535
536 if (radio_add_work(wpa_s, bss->freq, "sme-connect", 1,
537 sme_auth_start_cb, cwork) < 0)
538 wpas_connect_work_free(cwork);
539 }
540
541
542 #ifdef CONFIG_SAE
543
sme_sae_auth(struct wpa_supplicant * wpa_s,u16 auth_transaction,u16 status_code,const u8 * data,size_t len)544 static int sme_sae_auth(struct wpa_supplicant *wpa_s, u16 auth_transaction,
545 u16 status_code, const u8 *data, size_t len)
546 {
547 wpa_dbg(wpa_s, MSG_DEBUG, "SME: SAE authentication transaction %u "
548 "status code %u", auth_transaction, status_code);
549
550 if (auth_transaction == 1 &&
551 status_code == WLAN_STATUS_ANTI_CLOGGING_TOKEN_REQ &&
552 wpa_s->sme.sae.state == SAE_COMMITTED &&
553 wpa_s->current_bss && wpa_s->current_ssid) {
554 wpa_dbg(wpa_s, MSG_DEBUG, "SME: SAE anti-clogging token "
555 "requested");
556 wpabuf_free(wpa_s->sme.sae_token);
557 wpa_s->sme.sae_token = wpabuf_alloc_copy(data, len);
558 sme_send_authentication(wpa_s, wpa_s->current_bss,
559 wpa_s->current_ssid, 1);
560 return 0;
561 }
562
563 if (auth_transaction == 1 &&
564 status_code == WLAN_STATUS_FINITE_CYCLIC_GROUP_NOT_SUPPORTED &&
565 wpa_s->sme.sae.state == SAE_COMMITTED &&
566 wpa_s->current_bss && wpa_s->current_ssid) {
567 wpa_dbg(wpa_s, MSG_DEBUG, "SME: SAE group not supported");
568 wpa_s->sme.sae_group_index++;
569 if (sme_set_sae_group(wpa_s) < 0)
570 return -1; /* no other groups enabled */
571 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Try next enabled SAE group");
572 sme_send_authentication(wpa_s, wpa_s->current_bss,
573 wpa_s->current_ssid, 1);
574 return 0;
575 }
576
577 if (status_code != WLAN_STATUS_SUCCESS)
578 return -1;
579
580 if (auth_transaction == 1) {
581 int *groups = wpa_s->conf->sae_groups;
582
583 wpa_dbg(wpa_s, MSG_DEBUG, "SME SAE commit");
584 if (wpa_s->current_bss == NULL ||
585 wpa_s->current_ssid == NULL)
586 return -1;
587 if (wpa_s->sme.sae.state != SAE_COMMITTED)
588 return -1;
589 if (groups && groups[0] <= 0)
590 groups = NULL;
591 if (sae_parse_commit(&wpa_s->sme.sae, data, len, NULL, NULL,
592 groups) != WLAN_STATUS_SUCCESS)
593 return -1;
594
595 if (sae_process_commit(&wpa_s->sme.sae) < 0) {
596 wpa_printf(MSG_DEBUG, "SAE: Failed to process peer "
597 "commit");
598 return -1;
599 }
600
601 wpabuf_free(wpa_s->sme.sae_token);
602 wpa_s->sme.sae_token = NULL;
603 sme_send_authentication(wpa_s, wpa_s->current_bss,
604 wpa_s->current_ssid, 0);
605 return 0;
606 } else if (auth_transaction == 2) {
607 wpa_dbg(wpa_s, MSG_DEBUG, "SME SAE confirm");
608 if (wpa_s->sme.sae.state != SAE_CONFIRMED)
609 return -1;
610 if (sae_check_confirm(&wpa_s->sme.sae, data, len) < 0)
611 return -1;
612 wpa_s->sme.sae.state = SAE_ACCEPTED;
613 sae_clear_temp_data(&wpa_s->sme.sae);
614 return 1;
615 }
616
617 return -1;
618 }
619 #endif /* CONFIG_SAE */
620
621
sme_event_auth(struct wpa_supplicant * wpa_s,union wpa_event_data * data)622 void sme_event_auth(struct wpa_supplicant *wpa_s, union wpa_event_data *data)
623 {
624 struct wpa_ssid *ssid = wpa_s->current_ssid;
625
626 if (ssid == NULL) {
627 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Ignore authentication event "
628 "when network is not selected");
629 return;
630 }
631
632 if (wpa_s->wpa_state != WPA_AUTHENTICATING) {
633 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Ignore authentication event "
634 "when not in authenticating state");
635 return;
636 }
637
638 if (os_memcmp(wpa_s->pending_bssid, data->auth.peer, ETH_ALEN) != 0) {
639 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Ignore authentication with "
640 "unexpected peer " MACSTR,
641 MAC2STR(data->auth.peer));
642 return;
643 }
644
645 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Authentication response: peer=" MACSTR
646 " auth_type=%d auth_transaction=%d status_code=%d",
647 MAC2STR(data->auth.peer), data->auth.auth_type,
648 data->auth.auth_transaction, data->auth.status_code);
649 wpa_hexdump(MSG_MSGDUMP, "SME: Authentication response IEs",
650 data->auth.ies, data->auth.ies_len);
651
652 eloop_cancel_timeout(sme_auth_timer, wpa_s, NULL);
653
654 #ifdef CONFIG_SAE
655 if (data->auth.auth_type == WLAN_AUTH_SAE) {
656 int res;
657 res = sme_sae_auth(wpa_s, data->auth.auth_transaction,
658 data->auth.status_code, data->auth.ies,
659 data->auth.ies_len);
660 if (res < 0) {
661 wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
662 wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED);
663
664 }
665 if (res != 1)
666 return;
667
668 wpa_printf(MSG_DEBUG, "SME: SAE completed - setting PMK for "
669 "4-way handshake");
670 wpa_sm_set_pmk(wpa_s->wpa, wpa_s->sme.sae.pmk, PMK_LEN);
671 }
672 #endif /* CONFIG_SAE */
673
674 if (data->auth.status_code != WLAN_STATUS_SUCCESS) {
675 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Authentication failed (status "
676 "code %d)", data->auth.status_code);
677
678 if (data->auth.status_code !=
679 WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG ||
680 wpa_s->sme.auth_alg == data->auth.auth_type ||
681 wpa_s->current_ssid->auth_alg == WPA_AUTH_ALG_LEAP) {
682 wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
683 wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED);
684 return;
685 }
686
687 wpas_connect_work_done(wpa_s);
688
689 switch (data->auth.auth_type) {
690 case WLAN_AUTH_OPEN:
691 wpa_s->current_ssid->auth_alg = WPA_AUTH_ALG_SHARED;
692
693 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Trying SHARED auth");
694 wpa_supplicant_associate(wpa_s, wpa_s->current_bss,
695 wpa_s->current_ssid);
696 return;
697
698 case WLAN_AUTH_SHARED_KEY:
699 wpa_s->current_ssid->auth_alg = WPA_AUTH_ALG_LEAP;
700
701 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Trying LEAP auth");
702 wpa_supplicant_associate(wpa_s, wpa_s->current_bss,
703 wpa_s->current_ssid);
704 return;
705
706 default:
707 return;
708 }
709 }
710
711 #ifdef CONFIG_IEEE80211R
712 if (data->auth.auth_type == WLAN_AUTH_FT) {
713 union wpa_event_data edata;
714 os_memset(&edata, 0, sizeof(edata));
715 edata.ft_ies.ies = data->auth.ies;
716 edata.ft_ies.ies_len = data->auth.ies_len;
717 os_memcpy(edata.ft_ies.target_ap, data->auth.peer, ETH_ALEN);
718 wpa_supplicant_event(wpa_s, EVENT_FT_RESPONSE, &edata);
719 }
720 #endif /* CONFIG_IEEE80211R */
721
722 sme_associate(wpa_s, ssid->mode, data->auth.peer,
723 data->auth.auth_type);
724 }
725
726
sme_associate(struct wpa_supplicant * wpa_s,enum wpas_mode mode,const u8 * bssid,u16 auth_type)727 void sme_associate(struct wpa_supplicant *wpa_s, enum wpas_mode mode,
728 const u8 *bssid, u16 auth_type)
729 {
730 struct wpa_driver_associate_params params;
731 struct ieee802_11_elems elems;
732 #ifdef CONFIG_HT_OVERRIDES
733 struct ieee80211_ht_capabilities htcaps;
734 struct ieee80211_ht_capabilities htcaps_mask;
735 #endif /* CONFIG_HT_OVERRIDES */
736 #ifdef CONFIG_VHT_OVERRIDES
737 struct ieee80211_vht_capabilities vhtcaps;
738 struct ieee80211_vht_capabilities vhtcaps_mask;
739 #endif /* CONFIG_VHT_OVERRIDES */
740
741 os_memset(¶ms, 0, sizeof(params));
742 params.bssid = bssid;
743 params.ssid = wpa_s->sme.ssid;
744 params.ssid_len = wpa_s->sme.ssid_len;
745 params.freq = wpa_s->sme.freq;
746 params.bg_scan_period = wpa_s->current_ssid ?
747 wpa_s->current_ssid->bg_scan_period : -1;
748 params.wpa_ie = wpa_s->sme.assoc_req_ie_len ?
749 wpa_s->sme.assoc_req_ie : NULL;
750 params.wpa_ie_len = wpa_s->sme.assoc_req_ie_len;
751 params.pairwise_suite = wpa_s->pairwise_cipher;
752 params.group_suite = wpa_s->group_cipher;
753 params.key_mgmt_suite = wpa_s->key_mgmt;
754 params.wpa_proto = wpa_s->wpa_proto;
755 #ifdef CONFIG_HT_OVERRIDES
756 os_memset(&htcaps, 0, sizeof(htcaps));
757 os_memset(&htcaps_mask, 0, sizeof(htcaps_mask));
758 params.htcaps = (u8 *) &htcaps;
759 params.htcaps_mask = (u8 *) &htcaps_mask;
760 wpa_supplicant_apply_ht_overrides(wpa_s, wpa_s->current_ssid, ¶ms);
761 #endif /* CONFIG_HT_OVERRIDES */
762 #ifdef CONFIG_VHT_OVERRIDES
763 os_memset(&vhtcaps, 0, sizeof(vhtcaps));
764 os_memset(&vhtcaps_mask, 0, sizeof(vhtcaps_mask));
765 params.vhtcaps = &vhtcaps;
766 params.vhtcaps_mask = &vhtcaps_mask;
767 wpa_supplicant_apply_vht_overrides(wpa_s, wpa_s->current_ssid, ¶ms);
768 #endif /* CONFIG_VHT_OVERRIDES */
769 #ifdef CONFIG_IEEE80211R
770 if (auth_type == WLAN_AUTH_FT && wpa_s->sme.ft_ies) {
771 params.wpa_ie = wpa_s->sme.ft_ies;
772 params.wpa_ie_len = wpa_s->sme.ft_ies_len;
773 }
774 #endif /* CONFIG_IEEE80211R */
775 params.mode = mode;
776 params.mgmt_frame_protection = wpa_s->sme.mfp;
777 if (wpa_s->sme.prev_bssid_set)
778 params.prev_bssid = wpa_s->sme.prev_bssid;
779
780 wpa_msg(wpa_s, MSG_INFO, "Trying to associate with " MACSTR
781 " (SSID='%s' freq=%d MHz)", MAC2STR(params.bssid),
782 params.ssid ? wpa_ssid_txt(params.ssid, params.ssid_len) : "",
783 params.freq);
784
785 wpa_supplicant_set_state(wpa_s, WPA_ASSOCIATING);
786
787 if (params.wpa_ie == NULL ||
788 ieee802_11_parse_elems(params.wpa_ie, params.wpa_ie_len, &elems, 0)
789 < 0) {
790 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Could not parse own IEs?!");
791 os_memset(&elems, 0, sizeof(elems));
792 }
793 if (elems.rsn_ie) {
794 params.wpa_proto = WPA_PROTO_RSN;
795 wpa_sm_set_assoc_wpa_ie(wpa_s->wpa, elems.rsn_ie - 2,
796 elems.rsn_ie_len + 2);
797 } else if (elems.wpa_ie) {
798 params.wpa_proto = WPA_PROTO_WPA;
799 wpa_sm_set_assoc_wpa_ie(wpa_s->wpa, elems.wpa_ie - 2,
800 elems.wpa_ie_len + 2);
801 } else if (elems.osen) {
802 params.wpa_proto = WPA_PROTO_OSEN;
803 wpa_sm_set_assoc_wpa_ie(wpa_s->wpa, elems.osen - 2,
804 elems.osen_len + 2);
805 } else
806 wpa_sm_set_assoc_wpa_ie(wpa_s->wpa, NULL, 0);
807 if (wpa_s->current_ssid && wpa_s->current_ssid->p2p_group)
808 params.p2p = 1;
809
810 if (wpa_s->parent->set_sta_uapsd)
811 params.uapsd = wpa_s->parent->sta_uapsd;
812 else
813 params.uapsd = -1;
814
815 if (wpa_drv_associate(wpa_s, ¶ms) < 0) {
816 wpa_msg(wpa_s, MSG_INFO, "SME: Association request to the "
817 "driver failed");
818 wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
819 wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED);
820 os_memset(wpa_s->pending_bssid, 0, ETH_ALEN);
821 return;
822 }
823
824 eloop_register_timeout(SME_ASSOC_TIMEOUT, 0, sme_assoc_timer, wpa_s,
825 NULL);
826 }
827
828
sme_update_ft_ies(struct wpa_supplicant * wpa_s,const u8 * md,const u8 * ies,size_t ies_len)829 int sme_update_ft_ies(struct wpa_supplicant *wpa_s, const u8 *md,
830 const u8 *ies, size_t ies_len)
831 {
832 if (md == NULL || ies == NULL) {
833 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Remove mobility domain");
834 os_free(wpa_s->sme.ft_ies);
835 wpa_s->sme.ft_ies = NULL;
836 wpa_s->sme.ft_ies_len = 0;
837 wpa_s->sme.ft_used = 0;
838 return 0;
839 }
840
841 os_memcpy(wpa_s->sme.mobility_domain, md, MOBILITY_DOMAIN_ID_LEN);
842 wpa_hexdump(MSG_DEBUG, "SME: FT IEs", ies, ies_len);
843 os_free(wpa_s->sme.ft_ies);
844 wpa_s->sme.ft_ies = os_malloc(ies_len);
845 if (wpa_s->sme.ft_ies == NULL)
846 return -1;
847 os_memcpy(wpa_s->sme.ft_ies, ies, ies_len);
848 wpa_s->sme.ft_ies_len = ies_len;
849 return 0;
850 }
851
852
sme_deauth(struct wpa_supplicant * wpa_s)853 static void sme_deauth(struct wpa_supplicant *wpa_s)
854 {
855 int bssid_changed;
856
857 bssid_changed = !is_zero_ether_addr(wpa_s->bssid);
858
859 if (wpa_drv_deauthenticate(wpa_s, wpa_s->pending_bssid,
860 WLAN_REASON_DEAUTH_LEAVING) < 0) {
861 wpa_msg(wpa_s, MSG_INFO, "SME: Deauth request to the driver "
862 "failed");
863 }
864 wpa_s->sme.prev_bssid_set = 0;
865
866 wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
867 wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED);
868 os_memset(wpa_s->bssid, 0, ETH_ALEN);
869 os_memset(wpa_s->pending_bssid, 0, ETH_ALEN);
870 if (bssid_changed)
871 wpas_notify_bssid_changed(wpa_s);
872 }
873
874
sme_event_assoc_reject(struct wpa_supplicant * wpa_s,union wpa_event_data * data)875 void sme_event_assoc_reject(struct wpa_supplicant *wpa_s,
876 union wpa_event_data *data)
877 {
878 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Association with " MACSTR " failed: "
879 "status code %d", MAC2STR(wpa_s->pending_bssid),
880 data->assoc_reject.status_code);
881
882 eloop_cancel_timeout(sme_assoc_timer, wpa_s, NULL);
883
884 /*
885 * For now, unconditionally terminate the previous authentication. In
886 * theory, this should not be needed, but mac80211 gets quite confused
887 * if the authentication is left pending.. Some roaming cases might
888 * benefit from using the previous authentication, so this could be
889 * optimized in the future.
890 */
891 sme_deauth(wpa_s);
892 }
893
894
sme_event_auth_timed_out(struct wpa_supplicant * wpa_s,union wpa_event_data * data)895 void sme_event_auth_timed_out(struct wpa_supplicant *wpa_s,
896 union wpa_event_data *data)
897 {
898 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Authentication timed out");
899 wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
900 wpa_supplicant_mark_disassoc(wpa_s);
901 }
902
903
sme_event_assoc_timed_out(struct wpa_supplicant * wpa_s,union wpa_event_data * data)904 void sme_event_assoc_timed_out(struct wpa_supplicant *wpa_s,
905 union wpa_event_data *data)
906 {
907 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Association timed out");
908 wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
909 wpa_supplicant_mark_disassoc(wpa_s);
910 }
911
912
sme_event_disassoc(struct wpa_supplicant * wpa_s,struct disassoc_info * info)913 void sme_event_disassoc(struct wpa_supplicant *wpa_s,
914 struct disassoc_info *info)
915 {
916 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Disassociation event received");
917 if (wpa_s->sme.prev_bssid_set) {
918 /*
919 * cfg80211/mac80211 can get into somewhat confused state if
920 * the AP only disassociates us and leaves us in authenticated
921 * state. For now, force the state to be cleared to avoid
922 * confusing errors if we try to associate with the AP again.
923 */
924 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Deauthenticate to clear "
925 "driver state");
926 wpa_drv_deauthenticate(wpa_s, wpa_s->sme.prev_bssid,
927 WLAN_REASON_DEAUTH_LEAVING);
928 }
929 }
930
931
sme_auth_timer(void * eloop_ctx,void * timeout_ctx)932 static void sme_auth_timer(void *eloop_ctx, void *timeout_ctx)
933 {
934 struct wpa_supplicant *wpa_s = eloop_ctx;
935 if (wpa_s->wpa_state == WPA_AUTHENTICATING) {
936 wpa_msg(wpa_s, MSG_DEBUG, "SME: Authentication timeout");
937 sme_deauth(wpa_s);
938 }
939 }
940
941
sme_assoc_timer(void * eloop_ctx,void * timeout_ctx)942 static void sme_assoc_timer(void *eloop_ctx, void *timeout_ctx)
943 {
944 struct wpa_supplicant *wpa_s = eloop_ctx;
945 if (wpa_s->wpa_state == WPA_ASSOCIATING) {
946 wpa_msg(wpa_s, MSG_DEBUG, "SME: Association timeout");
947 sme_deauth(wpa_s);
948 }
949 }
950
951
sme_state_changed(struct wpa_supplicant * wpa_s)952 void sme_state_changed(struct wpa_supplicant *wpa_s)
953 {
954 /* Make sure timers are cleaned up appropriately. */
955 if (wpa_s->wpa_state != WPA_ASSOCIATING)
956 eloop_cancel_timeout(sme_assoc_timer, wpa_s, NULL);
957 if (wpa_s->wpa_state != WPA_AUTHENTICATING)
958 eloop_cancel_timeout(sme_auth_timer, wpa_s, NULL);
959 }
960
961
sme_disassoc_while_authenticating(struct wpa_supplicant * wpa_s,const u8 * prev_pending_bssid)962 void sme_disassoc_while_authenticating(struct wpa_supplicant *wpa_s,
963 const u8 *prev_pending_bssid)
964 {
965 /*
966 * mac80211-workaround to force deauth on failed auth cmd,
967 * requires us to remain in authenticating state to allow the
968 * second authentication attempt to be continued properly.
969 */
970 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Allow pending authentication "
971 "to proceed after disconnection event");
972 wpa_supplicant_set_state(wpa_s, WPA_AUTHENTICATING);
973 os_memcpy(wpa_s->pending_bssid, prev_pending_bssid, ETH_ALEN);
974
975 /*
976 * Re-arm authentication timer in case auth fails for whatever reason.
977 */
978 eloop_cancel_timeout(sme_auth_timer, wpa_s, NULL);
979 eloop_register_timeout(SME_AUTH_TIMEOUT, 0, sme_auth_timer, wpa_s,
980 NULL);
981 }
982
983
sme_deinit(struct wpa_supplicant * wpa_s)984 void sme_deinit(struct wpa_supplicant *wpa_s)
985 {
986 os_free(wpa_s->sme.ft_ies);
987 wpa_s->sme.ft_ies = NULL;
988 wpa_s->sme.ft_ies_len = 0;
989 #ifdef CONFIG_IEEE80211W
990 sme_stop_sa_query(wpa_s);
991 #endif /* CONFIG_IEEE80211W */
992 #ifdef CONFIG_SAE
993 wpabuf_free(wpa_s->sme.sae_token);
994 wpa_s->sme.sae_token = NULL;
995 sae_clear_data(&wpa_s->sme.sae);
996 #endif /* CONFIG_SAE */
997
998 eloop_cancel_timeout(sme_assoc_timer, wpa_s, NULL);
999 eloop_cancel_timeout(sme_auth_timer, wpa_s, NULL);
1000 eloop_cancel_timeout(sme_obss_scan_timeout, wpa_s, NULL);
1001 }
1002
1003
sme_send_2040_bss_coex(struct wpa_supplicant * wpa_s,const u8 * chan_list,u8 num_channels,u8 num_intol)1004 static void sme_send_2040_bss_coex(struct wpa_supplicant *wpa_s,
1005 const u8 *chan_list, u8 num_channels,
1006 u8 num_intol)
1007 {
1008 struct ieee80211_2040_bss_coex_ie *bc_ie;
1009 struct ieee80211_2040_intol_chan_report *ic_report;
1010 struct wpabuf *buf;
1011
1012 wpa_printf(MSG_DEBUG, "SME: Send 20/40 BSS Coexistence to " MACSTR
1013 " (num_channels=%u num_intol=%u)",
1014 MAC2STR(wpa_s->bssid), num_channels, num_intol);
1015 wpa_hexdump(MSG_DEBUG, "SME: 20/40 BSS Intolerant Channels",
1016 chan_list, num_channels);
1017
1018 buf = wpabuf_alloc(2 + /* action.category + action_code */
1019 sizeof(struct ieee80211_2040_bss_coex_ie) +
1020 sizeof(struct ieee80211_2040_intol_chan_report) +
1021 num_channels);
1022 if (buf == NULL)
1023 return;
1024
1025 wpabuf_put_u8(buf, WLAN_ACTION_PUBLIC);
1026 wpabuf_put_u8(buf, WLAN_PA_20_40_BSS_COEX);
1027
1028 bc_ie = wpabuf_put(buf, sizeof(*bc_ie));
1029 bc_ie->element_id = WLAN_EID_20_40_BSS_COEXISTENCE;
1030 bc_ie->length = 1;
1031 if (num_intol)
1032 bc_ie->coex_param |= WLAN_20_40_BSS_COEX_20MHZ_WIDTH_REQ;
1033
1034 if (num_channels > 0) {
1035 ic_report = wpabuf_put(buf, sizeof(*ic_report));
1036 ic_report->element_id = WLAN_EID_20_40_BSS_INTOLERANT;
1037 ic_report->length = num_channels + 1;
1038 ic_report->op_class = 0;
1039 os_memcpy(wpabuf_put(buf, num_channels), chan_list,
1040 num_channels);
1041 }
1042
1043 if (wpa_drv_send_action(wpa_s, wpa_s->assoc_freq, 0, wpa_s->bssid,
1044 wpa_s->own_addr, wpa_s->bssid,
1045 wpabuf_head(buf), wpabuf_len(buf), 0) < 0) {
1046 wpa_msg(wpa_s, MSG_INFO,
1047 "SME: Failed to send 20/40 BSS Coexistence frame");
1048 }
1049
1050 wpabuf_free(buf);
1051 }
1052
1053
sme_proc_obss_scan(struct wpa_supplicant * wpa_s)1054 int sme_proc_obss_scan(struct wpa_supplicant *wpa_s)
1055 {
1056 struct wpa_bss *bss;
1057 const u8 *ie;
1058 u16 ht_cap;
1059 u8 chan_list[P2P_MAX_CHANNELS], channel;
1060 u8 num_channels = 0, num_intol = 0, i;
1061
1062 if (!wpa_s->sme.sched_obss_scan)
1063 return 0;
1064
1065 wpa_s->sme.sched_obss_scan = 0;
1066 if (!wpa_s->current_bss || wpa_s->wpa_state != WPA_COMPLETED)
1067 return 1;
1068
1069 /*
1070 * Check whether AP uses regulatory triplet or channel triplet in
1071 * country info. Right now the operating class of the BSS channel
1072 * width trigger event is "unknown" (IEEE Std 802.11-2012 10.15.12),
1073 * based on the assumption that operating class triplet is not used in
1074 * beacon frame. If the First Channel Number/Operating Extension
1075 * Identifier octet has a positive integer value of 201 or greater,
1076 * then its operating class triplet.
1077 *
1078 * TODO: If Supported Operating Classes element is present in beacon
1079 * frame, have to lookup operating class in Annex E and fill them in
1080 * 2040 coex frame.
1081 */
1082 ie = wpa_bss_get_ie(wpa_s->current_bss, WLAN_EID_COUNTRY);
1083 if (ie && (ie[1] >= 6) && (ie[5] >= 201))
1084 return 1;
1085
1086 os_memset(chan_list, 0, sizeof(chan_list));
1087
1088 dl_list_for_each(bss, &wpa_s->bss, struct wpa_bss, list) {
1089 /* Skip other band bss */
1090 enum hostapd_hw_mode mode;
1091 mode = ieee80211_freq_to_chan(bss->freq, &channel);
1092 if (mode != HOSTAPD_MODE_IEEE80211G &&
1093 mode != HOSTAPD_MODE_IEEE80211B)
1094 continue;
1095
1096 ie = wpa_bss_get_ie(bss, WLAN_EID_HT_CAP);
1097 ht_cap = (ie && (ie[1] == 26)) ? WPA_GET_LE16(ie + 2) : 0;
1098 wpa_printf(MSG_DEBUG, "SME OBSS scan BSS " MACSTR
1099 " freq=%u chan=%u ht_cap=0x%x",
1100 MAC2STR(bss->bssid), bss->freq, channel, ht_cap);
1101
1102 if (!ht_cap || (ht_cap & HT_CAP_INFO_40MHZ_INTOLERANT)) {
1103 if (ht_cap & HT_CAP_INFO_40MHZ_INTOLERANT)
1104 num_intol++;
1105
1106 /* Check whether the channel is already considered */
1107 for (i = 0; i < num_channels; i++) {
1108 if (channel == chan_list[i])
1109 break;
1110 }
1111 if (i != num_channels)
1112 continue;
1113
1114 chan_list[num_channels++] = channel;
1115 }
1116 }
1117
1118 sme_send_2040_bss_coex(wpa_s, chan_list, num_channels, num_intol);
1119 return 1;
1120 }
1121
1122
get_mode(struct hostapd_hw_modes * modes,u16 num_modes,enum hostapd_hw_mode mode)1123 static struct hostapd_hw_modes * get_mode(struct hostapd_hw_modes *modes,
1124 u16 num_modes,
1125 enum hostapd_hw_mode mode)
1126 {
1127 u16 i;
1128
1129 for (i = 0; i < num_modes; i++) {
1130 if (modes[i].mode == mode)
1131 return &modes[i];
1132 }
1133
1134 return NULL;
1135 }
1136
1137
wpa_setband_scan_freqs_list(struct wpa_supplicant * wpa_s,enum hostapd_hw_mode band,struct wpa_driver_scan_params * params)1138 static void wpa_setband_scan_freqs_list(struct wpa_supplicant *wpa_s,
1139 enum hostapd_hw_mode band,
1140 struct wpa_driver_scan_params *params)
1141 {
1142 /* Include only supported channels for the specified band */
1143 struct hostapd_hw_modes *mode;
1144 int count, i;
1145
1146 mode = get_mode(wpa_s->hw.modes, wpa_s->hw.num_modes, band);
1147 if (mode == NULL) {
1148 /* No channels supported in this band - use empty list */
1149 params->freqs = os_zalloc(sizeof(int));
1150 return;
1151 }
1152
1153 params->freqs = os_calloc(mode->num_channels + 1, sizeof(int));
1154 if (params->freqs == NULL)
1155 return;
1156 for (count = 0, i = 0; i < mode->num_channels; i++) {
1157 if (mode->channels[i].flag & HOSTAPD_CHAN_DISABLED)
1158 continue;
1159 params->freqs[count++] = mode->channels[i].freq;
1160 }
1161 }
1162
1163
sme_obss_scan_timeout(void * eloop_ctx,void * timeout_ctx)1164 static void sme_obss_scan_timeout(void *eloop_ctx, void *timeout_ctx)
1165 {
1166 struct wpa_supplicant *wpa_s = eloop_ctx;
1167 struct wpa_driver_scan_params params;
1168
1169 if (!wpa_s->current_bss) {
1170 wpa_printf(MSG_DEBUG, "SME OBSS: Ignore scan request");
1171 return;
1172 }
1173
1174 os_memset(¶ms, 0, sizeof(params));
1175 wpa_setband_scan_freqs_list(wpa_s, HOSTAPD_MODE_IEEE80211G, ¶ms);
1176 params.low_priority = 1;
1177 wpa_printf(MSG_DEBUG, "SME OBSS: Request an OBSS scan");
1178
1179 if (wpa_supplicant_trigger_scan(wpa_s, ¶ms))
1180 wpa_printf(MSG_DEBUG, "SME OBSS: Failed to trigger scan");
1181 else
1182 wpa_s->sme.sched_obss_scan = 1;
1183 os_free(params.freqs);
1184
1185 eloop_register_timeout(wpa_s->sme.obss_scan_int, 0,
1186 sme_obss_scan_timeout, wpa_s, NULL);
1187 }
1188
1189
sme_sched_obss_scan(struct wpa_supplicant * wpa_s,int enable)1190 void sme_sched_obss_scan(struct wpa_supplicant *wpa_s, int enable)
1191 {
1192 const u8 *ie;
1193 struct wpa_bss *bss = wpa_s->current_bss;
1194 struct wpa_ssid *ssid = wpa_s->current_ssid;
1195 struct hostapd_hw_modes *hw_mode = NULL;
1196 int i;
1197
1198 eloop_cancel_timeout(sme_obss_scan_timeout, wpa_s, NULL);
1199 wpa_s->sme.sched_obss_scan = 0;
1200 if (!enable)
1201 return;
1202
1203 /*
1204 * Schedule OBSS scan if driver is using station SME in wpa_supplicant
1205 * or it expects OBSS scan to be performed by wpa_supplicant.
1206 */
1207 if (!((wpa_s->drv_flags & WPA_DRIVER_FLAGS_SME) ||
1208 (wpa_s->drv_flags & WPA_DRIVER_FLAGS_OBSS_SCAN)) ||
1209 ssid == NULL || ssid->mode != IEEE80211_MODE_INFRA)
1210 return;
1211
1212 if (!wpa_s->hw.modes)
1213 return;
1214
1215 /* only HT caps in 11g mode are relevant */
1216 for (i = 0; i < wpa_s->hw.num_modes; i++) {
1217 hw_mode = &wpa_s->hw.modes[i];
1218 if (hw_mode->mode == HOSTAPD_MODE_IEEE80211G)
1219 break;
1220 }
1221
1222 /* Driver does not support HT40 for 11g or doesn't have 11g. */
1223 if (i == wpa_s->hw.num_modes || !hw_mode ||
1224 !(hw_mode->ht_capab & HT_CAP_INFO_SUPP_CHANNEL_WIDTH_SET))
1225 return;
1226
1227 if (bss == NULL || bss->freq < 2400 || bss->freq > 2500)
1228 return; /* Not associated on 2.4 GHz band */
1229
1230 /* Check whether AP supports HT40 */
1231 ie = wpa_bss_get_ie(wpa_s->current_bss, WLAN_EID_HT_CAP);
1232 if (!ie || ie[1] < 2 ||
1233 !(WPA_GET_LE16(ie + 2) & HT_CAP_INFO_SUPP_CHANNEL_WIDTH_SET))
1234 return; /* AP does not support HT40 */
1235
1236 ie = wpa_bss_get_ie(wpa_s->current_bss,
1237 WLAN_EID_OVERLAPPING_BSS_SCAN_PARAMS);
1238 if (!ie || ie[1] < 14)
1239 return; /* AP does not request OBSS scans */
1240
1241 wpa_s->sme.obss_scan_int = WPA_GET_LE16(ie + 6);
1242 if (wpa_s->sme.obss_scan_int < 10) {
1243 wpa_printf(MSG_DEBUG, "SME: Invalid OBSS Scan Interval %u "
1244 "replaced with the minimum 10 sec",
1245 wpa_s->sme.obss_scan_int);
1246 wpa_s->sme.obss_scan_int = 10;
1247 }
1248 wpa_printf(MSG_DEBUG, "SME: OBSS Scan Interval %u sec",
1249 wpa_s->sme.obss_scan_int);
1250 eloop_register_timeout(wpa_s->sme.obss_scan_int, 0,
1251 sme_obss_scan_timeout, wpa_s, NULL);
1252 }
1253
1254
1255 #ifdef CONFIG_IEEE80211W
1256
1257 static const unsigned int sa_query_max_timeout = 1000;
1258 static const unsigned int sa_query_retry_timeout = 201;
1259
sme_check_sa_query_timeout(struct wpa_supplicant * wpa_s)1260 static int sme_check_sa_query_timeout(struct wpa_supplicant *wpa_s)
1261 {
1262 u32 tu;
1263 struct os_reltime now, passed;
1264 os_get_reltime(&now);
1265 os_reltime_sub(&now, &wpa_s->sme.sa_query_start, &passed);
1266 tu = (passed.sec * 1000000 + passed.usec) / 1024;
1267 if (sa_query_max_timeout < tu) {
1268 wpa_dbg(wpa_s, MSG_DEBUG, "SME: SA Query timed out");
1269 sme_stop_sa_query(wpa_s);
1270 wpa_supplicant_deauthenticate(
1271 wpa_s, WLAN_REASON_PREV_AUTH_NOT_VALID);
1272 return 1;
1273 }
1274
1275 return 0;
1276 }
1277
1278
sme_send_sa_query_req(struct wpa_supplicant * wpa_s,const u8 * trans_id)1279 static void sme_send_sa_query_req(struct wpa_supplicant *wpa_s,
1280 const u8 *trans_id)
1281 {
1282 u8 req[2 + WLAN_SA_QUERY_TR_ID_LEN];
1283 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Sending SA Query Request to "
1284 MACSTR, MAC2STR(wpa_s->bssid));
1285 wpa_hexdump(MSG_DEBUG, "SME: SA Query Transaction ID",
1286 trans_id, WLAN_SA_QUERY_TR_ID_LEN);
1287 req[0] = WLAN_ACTION_SA_QUERY;
1288 req[1] = WLAN_SA_QUERY_REQUEST;
1289 os_memcpy(req + 2, trans_id, WLAN_SA_QUERY_TR_ID_LEN);
1290 if (wpa_drv_send_action(wpa_s, wpa_s->assoc_freq, 0, wpa_s->bssid,
1291 wpa_s->own_addr, wpa_s->bssid,
1292 req, sizeof(req), 0) < 0)
1293 wpa_msg(wpa_s, MSG_INFO, "SME: Failed to send SA Query "
1294 "Request");
1295 }
1296
1297
sme_sa_query_timer(void * eloop_ctx,void * timeout_ctx)1298 static void sme_sa_query_timer(void *eloop_ctx, void *timeout_ctx)
1299 {
1300 struct wpa_supplicant *wpa_s = eloop_ctx;
1301 unsigned int timeout, sec, usec;
1302 u8 *trans_id, *nbuf;
1303
1304 if (wpa_s->sme.sa_query_count > 0 &&
1305 sme_check_sa_query_timeout(wpa_s))
1306 return;
1307
1308 nbuf = os_realloc_array(wpa_s->sme.sa_query_trans_id,
1309 wpa_s->sme.sa_query_count + 1,
1310 WLAN_SA_QUERY_TR_ID_LEN);
1311 if (nbuf == NULL)
1312 return;
1313 if (wpa_s->sme.sa_query_count == 0) {
1314 /* Starting a new SA Query procedure */
1315 os_get_reltime(&wpa_s->sme.sa_query_start);
1316 }
1317 trans_id = nbuf + wpa_s->sme.sa_query_count * WLAN_SA_QUERY_TR_ID_LEN;
1318 wpa_s->sme.sa_query_trans_id = nbuf;
1319 wpa_s->sme.sa_query_count++;
1320
1321 os_get_random(trans_id, WLAN_SA_QUERY_TR_ID_LEN);
1322
1323 timeout = sa_query_retry_timeout;
1324 sec = ((timeout / 1000) * 1024) / 1000;
1325 usec = (timeout % 1000) * 1024;
1326 eloop_register_timeout(sec, usec, sme_sa_query_timer, wpa_s, NULL);
1327
1328 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Association SA Query attempt %d",
1329 wpa_s->sme.sa_query_count);
1330
1331 sme_send_sa_query_req(wpa_s, trans_id);
1332 }
1333
1334
sme_start_sa_query(struct wpa_supplicant * wpa_s)1335 static void sme_start_sa_query(struct wpa_supplicant *wpa_s)
1336 {
1337 sme_sa_query_timer(wpa_s, NULL);
1338 }
1339
1340
sme_stop_sa_query(struct wpa_supplicant * wpa_s)1341 static void sme_stop_sa_query(struct wpa_supplicant *wpa_s)
1342 {
1343 eloop_cancel_timeout(sme_sa_query_timer, wpa_s, NULL);
1344 os_free(wpa_s->sme.sa_query_trans_id);
1345 wpa_s->sme.sa_query_trans_id = NULL;
1346 wpa_s->sme.sa_query_count = 0;
1347 }
1348
1349
sme_event_unprot_disconnect(struct wpa_supplicant * wpa_s,const u8 * sa,const u8 * da,u16 reason_code)1350 void sme_event_unprot_disconnect(struct wpa_supplicant *wpa_s, const u8 *sa,
1351 const u8 *da, u16 reason_code)
1352 {
1353 struct wpa_ssid *ssid;
1354 struct os_reltime now;
1355
1356 if (wpa_s->wpa_state != WPA_COMPLETED)
1357 return;
1358 ssid = wpa_s->current_ssid;
1359 if (ssid == NULL ||
1360 (ssid->ieee80211w == MGMT_FRAME_PROTECTION_DEFAULT ?
1361 wpa_s->conf->pmf : ssid->ieee80211w) == NO_MGMT_FRAME_PROTECTION)
1362 return;
1363 if (os_memcmp(sa, wpa_s->bssid, ETH_ALEN) != 0)
1364 return;
1365 if (reason_code != WLAN_REASON_CLASS2_FRAME_FROM_NONAUTH_STA &&
1366 reason_code != WLAN_REASON_CLASS3_FRAME_FROM_NONASSOC_STA)
1367 return;
1368 if (wpa_s->sme.sa_query_count > 0)
1369 return;
1370
1371 os_get_reltime(&now);
1372 if (wpa_s->sme.last_unprot_disconnect.sec &&
1373 !os_reltime_expired(&now, &wpa_s->sme.last_unprot_disconnect, 10))
1374 return; /* limit SA Query procedure frequency */
1375 wpa_s->sme.last_unprot_disconnect = now;
1376
1377 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Unprotected disconnect dropped - "
1378 "possible AP/STA state mismatch - trigger SA Query");
1379 sme_start_sa_query(wpa_s);
1380 }
1381
1382
sme_sa_query_rx(struct wpa_supplicant * wpa_s,const u8 * sa,const u8 * data,size_t len)1383 void sme_sa_query_rx(struct wpa_supplicant *wpa_s, const u8 *sa,
1384 const u8 *data, size_t len)
1385 {
1386 int i;
1387
1388 if (wpa_s->sme.sa_query_trans_id == NULL ||
1389 len < 1 + WLAN_SA_QUERY_TR_ID_LEN ||
1390 data[0] != WLAN_SA_QUERY_RESPONSE)
1391 return;
1392 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Received SA Query response from "
1393 MACSTR " (trans_id %02x%02x)", MAC2STR(sa), data[1], data[2]);
1394
1395 if (os_memcmp(sa, wpa_s->bssid, ETH_ALEN) != 0)
1396 return;
1397
1398 for (i = 0; i < wpa_s->sme.sa_query_count; i++) {
1399 if (os_memcmp(wpa_s->sme.sa_query_trans_id +
1400 i * WLAN_SA_QUERY_TR_ID_LEN,
1401 data + 1, WLAN_SA_QUERY_TR_ID_LEN) == 0)
1402 break;
1403 }
1404
1405 if (i >= wpa_s->sme.sa_query_count) {
1406 wpa_dbg(wpa_s, MSG_DEBUG, "SME: No matching SA Query "
1407 "transaction identifier found");
1408 return;
1409 }
1410
1411 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Reply to pending SA Query received "
1412 "from " MACSTR, MAC2STR(sa));
1413 sme_stop_sa_query(wpa_s);
1414 }
1415
1416 #endif /* CONFIG_IEEE80211W */
1417