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SAE: Clear keys from memory on disassociation
[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
211 if (bss == NULL) {
212 wpa_msg(wpa_s, MSG_ERROR, "SME: No scan result available for "
213 "the network");
214 wpas_connect_work_done(wpa_s);
215 return;
216 }
217
218 wpa_s->current_bss = bss;
219
220 os_memset(&params, 0, sizeof(params));
221 wpa_s->reassociate = 0;
222
223 params.freq = bss->freq;
224 params.bssid = bss->bssid;
225 params.ssid = bss->ssid;
226 params.ssid_len = bss->ssid_len;
227 params.p2p = ssid->p2p_group;
228
229 if (wpa_s->sme.ssid_len != params.ssid_len ||
230 os_memcmp(wpa_s->sme.ssid, params.ssid, params.ssid_len) != 0)
231 wpa_s->sme.prev_bssid_set = 0;
232
233 wpa_s->sme.freq = params.freq;
234 os_memcpy(wpa_s->sme.ssid, params.ssid, params.ssid_len);
235 wpa_s->sme.ssid_len = params.ssid_len;
236
237 params.auth_alg = WPA_AUTH_ALG_OPEN;
238 #ifdef IEEE8021X_EAPOL
239 if (ssid->key_mgmt & WPA_KEY_MGMT_IEEE8021X_NO_WPA) {
240 if (ssid->leap) {
241 if (ssid->non_leap == 0)
242 params.auth_alg = WPA_AUTH_ALG_LEAP;
243 else
244 params.auth_alg |= WPA_AUTH_ALG_LEAP;
245 }
246 }
247 #endif /* IEEE8021X_EAPOL */
248 wpa_dbg(wpa_s, MSG_DEBUG, "Automatic auth_alg selection: 0x%x",
249 params.auth_alg);
250 if (ssid->auth_alg) {
251 params.auth_alg = ssid->auth_alg;
252 wpa_dbg(wpa_s, MSG_DEBUG, "Overriding auth_alg selection: "
253 "0x%x", params.auth_alg);
254 }
255 #ifdef CONFIG_SAE
256 wpa_s->sme.sae_pmksa_caching = 0;
257 if (wpa_key_mgmt_sae(ssid->key_mgmt)) {
258 const u8 *rsn;
259 struct wpa_ie_data ied;
260
261 rsn = wpa_bss_get_ie(bss, WLAN_EID_RSN);
262 if (!rsn) {
263 wpa_dbg(wpa_s, MSG_DEBUG,
264 "SAE enabled, but target BSS does not advertise RSN");
265 } else if (wpa_parse_wpa_ie(rsn, 2 + rsn[1], &ied) == 0 &&
266 wpa_key_mgmt_sae(ied.key_mgmt)) {
267 wpa_dbg(wpa_s, MSG_DEBUG, "Using SAE auth_alg");
268 params.auth_alg = WPA_AUTH_ALG_SAE;
269 } else {
270 wpa_dbg(wpa_s, MSG_DEBUG,
271 "SAE enabled, but target BSS does not advertise SAE AKM for RSN");
272 }
273 }
274 #endif /* CONFIG_SAE */
275
276 for (i = 0; i < NUM_WEP_KEYS; i++) {
277 if (ssid->wep_key_len[i])
278 params.wep_key[i] = ssid->wep_key[i];
279 params.wep_key_len[i] = ssid->wep_key_len[i];
280 }
281 params.wep_tx_keyidx = ssid->wep_tx_keyidx;
282
283 bssid_changed = !is_zero_ether_addr(wpa_s->bssid);
284 os_memset(wpa_s->bssid, 0, ETH_ALEN);
285 os_memcpy(wpa_s->pending_bssid, bss->bssid, ETH_ALEN);
286 if (bssid_changed)
287 wpas_notify_bssid_changed(wpa_s);
288
289 if ((wpa_bss_get_vendor_ie(bss, WPA_IE_VENDOR_TYPE) ||
290 wpa_bss_get_ie(bss, WLAN_EID_RSN)) &&
291 wpa_key_mgmt_wpa(ssid->key_mgmt)) {
292 int try_opportunistic;
293 try_opportunistic = (ssid->proactive_key_caching < 0 ?
294 wpa_s->conf->okc :
295 ssid->proactive_key_caching) &&
296 (ssid->proto & WPA_PROTO_RSN);
297 if (pmksa_cache_set_current(wpa_s->wpa, NULL, bss->bssid,
298 wpa_s->current_ssid,
299 try_opportunistic) == 0)
300 eapol_sm_notify_pmkid_attempt(wpa_s->eapol, 1);
301 wpa_s->sme.assoc_req_ie_len = sizeof(wpa_s->sme.assoc_req_ie);
302 if (wpa_supplicant_set_suites(wpa_s, bss, ssid,
303 wpa_s->sme.assoc_req_ie,
304 &wpa_s->sme.assoc_req_ie_len)) {
305 wpa_msg(wpa_s, MSG_WARNING, "SME: Failed to set WPA "
306 "key management and encryption suites");
307 wpas_connect_work_done(wpa_s);
308 return;
309 }
310 } else if ((ssid->key_mgmt & WPA_KEY_MGMT_IEEE8021X_NO_WPA) &&
311 wpa_key_mgmt_wpa_ieee8021x(ssid->key_mgmt)) {
312 /*
313 * Both WPA and non-WPA IEEE 802.1X enabled in configuration -
314 * use non-WPA since the scan results did not indicate that the
315 * AP is using WPA or WPA2.
316 */
317 wpa_supplicant_set_non_wpa_policy(wpa_s, ssid);
318 wpa_s->sme.assoc_req_ie_len = 0;
319 } else if (wpa_key_mgmt_wpa_any(ssid->key_mgmt)) {
320 wpa_s->sme.assoc_req_ie_len = sizeof(wpa_s->sme.assoc_req_ie);
321 if (wpa_supplicant_set_suites(wpa_s, NULL, ssid,
322 wpa_s->sme.assoc_req_ie,
323 &wpa_s->sme.assoc_req_ie_len)) {
324 wpa_msg(wpa_s, MSG_WARNING, "SME: Failed to set WPA "
325 "key management and encryption suites (no "
326 "scan results)");
327 wpas_connect_work_done(wpa_s);
328 return;
329 }
330 #ifdef CONFIG_WPS
331 } else if (ssid->key_mgmt & WPA_KEY_MGMT_WPS) {
332 struct wpabuf *wps_ie;
333 wps_ie = wps_build_assoc_req_ie(wpas_wps_get_req_type(ssid));
334 if (wps_ie && wpabuf_len(wps_ie) <=
335 sizeof(wpa_s->sme.assoc_req_ie)) {
336 wpa_s->sme.assoc_req_ie_len = wpabuf_len(wps_ie);
337 os_memcpy(wpa_s->sme.assoc_req_ie, wpabuf_head(wps_ie),
338 wpa_s->sme.assoc_req_ie_len);
339 } else
340 wpa_s->sme.assoc_req_ie_len = 0;
341 wpabuf_free(wps_ie);
342 wpa_supplicant_set_non_wpa_policy(wpa_s, ssid);
343 #endif /* CONFIG_WPS */
344 } else {
345 wpa_supplicant_set_non_wpa_policy(wpa_s, ssid);
346 wpa_s->sme.assoc_req_ie_len = 0;
347 }
348
349 #ifdef CONFIG_IEEE80211R
350 ie = wpa_bss_get_ie(bss, WLAN_EID_MOBILITY_DOMAIN);
351 if (ie && ie[1] >= MOBILITY_DOMAIN_ID_LEN)
352 md = ie + 2;
353 wpa_sm_set_ft_params(wpa_s->wpa, ie, ie ? 2 + ie[1] : 0);
354 if (md) {
355 /* Prepare for the next transition */
356 wpa_ft_prepare_auth_request(wpa_s->wpa, ie);
357 }
358
359 if (md && wpa_key_mgmt_ft(ssid->key_mgmt)) {
360 if (wpa_s->sme.assoc_req_ie_len + 5 <
361 sizeof(wpa_s->sme.assoc_req_ie)) {
362 struct rsn_mdie *mdie;
363 u8 *pos = wpa_s->sme.assoc_req_ie +
364 wpa_s->sme.assoc_req_ie_len;
365 *pos++ = WLAN_EID_MOBILITY_DOMAIN;
366 *pos++ = sizeof(*mdie);
367 mdie = (struct rsn_mdie *) pos;
368 os_memcpy(mdie->mobility_domain, md,
369 MOBILITY_DOMAIN_ID_LEN);
370 mdie->ft_capab = md[MOBILITY_DOMAIN_ID_LEN];
371 wpa_s->sme.assoc_req_ie_len += 5;
372 }
373
374 if (wpa_s->sme.ft_used &&
375 os_memcmp(md, wpa_s->sme.mobility_domain, 2) == 0 &&
376 wpa_sm_has_ptk(wpa_s->wpa)) {
377 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Trying to use FT "
378 "over-the-air");
379 params.auth_alg = WPA_AUTH_ALG_FT;
380 params.ie = wpa_s->sme.ft_ies;
381 params.ie_len = wpa_s->sme.ft_ies_len;
382 }
383 }
384 #endif /* CONFIG_IEEE80211R */
385
386 #ifdef CONFIG_IEEE80211W
387 wpa_s->sme.mfp = ssid->ieee80211w == MGMT_FRAME_PROTECTION_DEFAULT ?
388 wpa_s->conf->pmf : ssid->ieee80211w;
389 if (wpa_s->sme.mfp != NO_MGMT_FRAME_PROTECTION) {
390 const u8 *rsn = wpa_bss_get_ie(bss, WLAN_EID_RSN);
391 struct wpa_ie_data _ie;
392 if (rsn && wpa_parse_wpa_ie(rsn, 2 + rsn[1], &_ie) == 0 &&
393 _ie.capabilities &
394 (WPA_CAPABILITY_MFPC | WPA_CAPABILITY_MFPR)) {
395 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Selected AP supports "
396 "MFP: require MFP");
397 wpa_s->sme.mfp = MGMT_FRAME_PROTECTION_REQUIRED;
398 }
399 }
400 #endif /* CONFIG_IEEE80211W */
401
402 #ifdef CONFIG_P2P
403 if (wpa_s->global->p2p) {
404 u8 *pos;
405 size_t len;
406 int res;
407 pos = wpa_s->sme.assoc_req_ie + wpa_s->sme.assoc_req_ie_len;
408 len = sizeof(wpa_s->sme.assoc_req_ie) -
409 wpa_s->sme.assoc_req_ie_len;
410 res = wpas_p2p_assoc_req_ie(wpa_s, bss, pos, len,
411 ssid->p2p_group);
412 if (res >= 0)
413 wpa_s->sme.assoc_req_ie_len += res;
414 }
415 #endif /* CONFIG_P2P */
416
417 #ifdef CONFIG_HS20
418 if (is_hs20_network(wpa_s, ssid, bss)) {
419 struct wpabuf *hs20;
420 hs20 = wpabuf_alloc(20);
421 if (hs20) {
422 int pps_mo_id = hs20_get_pps_mo_id(wpa_s, ssid);
423 size_t len;
424
425 wpas_hs20_add_indication(hs20, pps_mo_id);
426 len = sizeof(wpa_s->sme.assoc_req_ie) -
427 wpa_s->sme.assoc_req_ie_len;
428 if (wpabuf_len(hs20) <= len) {
429 os_memcpy(wpa_s->sme.assoc_req_ie +
430 wpa_s->sme.assoc_req_ie_len,
431 wpabuf_head(hs20), wpabuf_len(hs20));
432 wpa_s->sme.assoc_req_ie_len += wpabuf_len(hs20);
433 }
434 wpabuf_free(hs20);
435 }
436 }
437 #endif /* CONFIG_HS20 */
438
439 ext_capab_len = wpas_build_ext_capab(wpa_s, ext_capab,
440 sizeof(ext_capab));
441 if (ext_capab_len > 0) {
442 u8 *pos = wpa_s->sme.assoc_req_ie;
443 if (wpa_s->sme.assoc_req_ie_len > 0 && pos[0] == WLAN_EID_RSN)
444 pos += 2 + pos[1];
445 os_memmove(pos + ext_capab_len, pos,
446 wpa_s->sme.assoc_req_ie_len -
447 (pos - wpa_s->sme.assoc_req_ie));
448 wpa_s->sme.assoc_req_ie_len += ext_capab_len;
449 os_memcpy(pos, ext_capab, ext_capab_len);
450 }
451
452 sme_auth_handle_rrm(wpa_s, bss);
453
454 #ifdef CONFIG_SAE
455 if (params.auth_alg == WPA_AUTH_ALG_SAE &&
456 pmksa_cache_set_current(wpa_s->wpa, NULL, bss->bssid, ssid, 0) == 0)
457 {
458 wpa_dbg(wpa_s, MSG_DEBUG,
459 "PMKSA cache entry found - try to use PMKSA caching instead of new SAE authentication");
460 params.auth_alg = WPA_AUTH_ALG_OPEN;
461 wpa_s->sme.sae_pmksa_caching = 1;
462 }
463
464 if (params.auth_alg == WPA_AUTH_ALG_SAE) {
465 if (start)
466 resp = sme_auth_build_sae_commit(wpa_s, ssid,
467 bss->bssid);
468 else
469 resp = sme_auth_build_sae_confirm(wpa_s);
470 if (resp == NULL) {
471 wpas_connection_failed(wpa_s, bss->bssid);
472 return;
473 }
474 params.sae_data = wpabuf_head(resp);
475 params.sae_data_len = wpabuf_len(resp);
476 wpa_s->sme.sae.state = start ? SAE_COMMITTED : SAE_CONFIRMED;
477 }
478 #endif /* CONFIG_SAE */
479
480 wpa_supplicant_cancel_sched_scan(wpa_s);
481 wpa_supplicant_cancel_scan(wpa_s);
482
483 wpa_msg(wpa_s, MSG_INFO, "SME: Trying to authenticate with " MACSTR
484 " (SSID='%s' freq=%d MHz)", MAC2STR(params.bssid),
485 wpa_ssid_txt(params.ssid, params.ssid_len), params.freq);
486
487 wpa_clear_keys(wpa_s, bss->bssid);
488 wpa_supplicant_set_state(wpa_s, WPA_AUTHENTICATING);
489 old_ssid = wpa_s->current_ssid;
490 wpa_s->current_ssid = ssid;
491 wpa_supplicant_rsn_supp_set_config(wpa_s, wpa_s->current_ssid);
492 wpa_supplicant_initiate_eapol(wpa_s);
493 if (old_ssid != wpa_s->current_ssid)
494 wpas_notify_network_changed(wpa_s);
495
496 #ifdef CONFIG_P2P
497 /*
498 * If multi-channel concurrency is not supported, check for any
499 * frequency conflict. In case of any frequency conflict, remove the
500 * least prioritized connection.
501 */
502 if (wpa_s->num_multichan_concurrent < 2) {
503 int freq, num;
504 num = get_shared_radio_freqs(wpa_s, &freq, 1);
505 if (num > 0 && freq > 0 && freq != params.freq) {
506 wpa_printf(MSG_DEBUG,
507 "Conflicting frequency found (%d != %d)",
508 freq, params.freq);
509 if (wpas_p2p_handle_frequency_conflicts(wpa_s,
510 params.freq,
511 ssid) < 0) {
512 wpas_connection_failed(wpa_s, bss->bssid);
513 wpa_supplicant_mark_disassoc(wpa_s);
514 wpabuf_free(resp);
515 wpas_connect_work_done(wpa_s);
516 return;
517 }
518 }
519 }
520 #endif /* CONFIG_P2P */
521
522 wpa_s->sme.auth_alg = params.auth_alg;
523 if (wpa_drv_authenticate(wpa_s, &params) < 0) {
524 wpa_msg(wpa_s, MSG_INFO, "SME: Authentication request to the "
525 "driver failed");
526 wpas_connection_failed(wpa_s, bss->bssid);
527 wpa_supplicant_mark_disassoc(wpa_s);
528 wpabuf_free(resp);
529 wpas_connect_work_done(wpa_s);
530 return;
531 }
532
533 eloop_register_timeout(SME_AUTH_TIMEOUT, 0, sme_auth_timer, wpa_s,
534 NULL);
535
536 /*
537 * Association will be started based on the authentication event from
538 * the driver.
539 */
540
541 wpabuf_free(resp);
542 }
543
544
545 static void sme_auth_start_cb(struct wpa_radio_work *work, int deinit)
546 {
547 struct wpa_connect_work *cwork = work->ctx;
548 struct wpa_supplicant *wpa_s = work->wpa_s;
549
550 if (deinit) {
551 if (work->started)
552 wpa_s->connect_work = NULL;
553
554 wpas_connect_work_free(cwork);
555 return;
556 }
557
558 wpa_s->connect_work = work;
559
560 if (cwork->bss_removed ||
561 !wpas_valid_bss_ssid(wpa_s, cwork->bss, cwork->ssid)) {
562 wpa_dbg(wpa_s, MSG_DEBUG, "SME: BSS/SSID entry for authentication not valid anymore - drop connection attempt");
563 wpas_connect_work_done(wpa_s);
564 return;
565 }
566
567 sme_send_authentication(wpa_s, cwork->bss, cwork->ssid, 1);
568 }
569
570
571 void sme_authenticate(struct wpa_supplicant *wpa_s,
572 struct wpa_bss *bss, struct wpa_ssid *ssid)
573 {
574 struct wpa_connect_work *cwork;
575
576 if (bss == NULL || ssid == NULL)
577 return;
578 if (wpa_s->connect_work) {
579 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Reject sme_authenticate() call since connect_work exist");
580 return;
581 }
582
583 if (radio_work_pending(wpa_s, "sme-connect")) {
584 /*
585 * The previous sme-connect work might no longer be valid due to
586 * the fact that the BSS list was updated. In addition, it makes
587 * sense to adhere to the 'newer' decision.
588 */
589 wpa_dbg(wpa_s, MSG_DEBUG,
590 "SME: Remove previous pending sme-connect");
591 radio_remove_works(wpa_s, "sme-connect", 0);
592 }
593
594 cwork = os_zalloc(sizeof(*cwork));
595 if (cwork == NULL)
596 return;
597 cwork->bss = bss;
598 cwork->ssid = ssid;
599 cwork->sme = 1;
600
601 #ifdef CONFIG_SAE
602 wpa_s->sme.sae.state = SAE_NOTHING;
603 wpa_s->sme.sae.send_confirm = 0;
604 wpa_s->sme.sae_group_index = 0;
605 #endif /* CONFIG_SAE */
606
607 if (radio_add_work(wpa_s, bss->freq, "sme-connect", 1,
608 sme_auth_start_cb, cwork) < 0)
609 wpas_connect_work_free(cwork);
610 }
611
612
613 #ifdef CONFIG_SAE
614
615 static int sme_sae_auth(struct wpa_supplicant *wpa_s, u16 auth_transaction,
616 u16 status_code, const u8 *data, size_t len)
617 {
618 int *groups;
619
620 wpa_dbg(wpa_s, MSG_DEBUG, "SME: SAE authentication transaction %u "
621 "status code %u", auth_transaction, status_code);
622
623 if (auth_transaction == 1 &&
624 status_code == WLAN_STATUS_ANTI_CLOGGING_TOKEN_REQ &&
625 wpa_s->sme.sae.state == SAE_COMMITTED &&
626 wpa_s->current_bss && wpa_s->current_ssid) {
627 int default_groups[] = { 19, 20, 21, 25, 26, 0 };
628 u16 group;
629
630 groups = wpa_s->conf->sae_groups;
631 if (!groups || groups[0] <= 0)
632 groups = default_groups;
633
634 if (len < sizeof(le16)) {
635 wpa_dbg(wpa_s, MSG_DEBUG,
636 "SME: Too short SAE anti-clogging token request");
637 return -1;
638 }
639 group = WPA_GET_LE16(data);
640 wpa_dbg(wpa_s, MSG_DEBUG,
641 "SME: SAE anti-clogging token requested (group %u)",
642 group);
643 if (sae_group_allowed(&wpa_s->sme.sae, groups, group) !=
644 WLAN_STATUS_SUCCESS) {
645 wpa_dbg(wpa_s, MSG_ERROR,
646 "SME: SAE group %u of anti-clogging request is invalid",
647 group);
648 return -1;
649 }
650 wpabuf_free(wpa_s->sme.sae_token);
651 wpa_s->sme.sae_token = wpabuf_alloc_copy(data + sizeof(le16),
652 len - sizeof(le16));
653 sme_send_authentication(wpa_s, wpa_s->current_bss,
654 wpa_s->current_ssid, 1);
655 return 0;
656 }
657
658 if (auth_transaction == 1 &&
659 status_code == WLAN_STATUS_FINITE_CYCLIC_GROUP_NOT_SUPPORTED &&
660 wpa_s->sme.sae.state == SAE_COMMITTED &&
661 wpa_s->current_bss && wpa_s->current_ssid) {
662 wpa_dbg(wpa_s, MSG_DEBUG, "SME: SAE group not supported");
663 wpa_s->sme.sae_group_index++;
664 if (sme_set_sae_group(wpa_s) < 0)
665 return -1; /* no other groups enabled */
666 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Try next enabled SAE group");
667 sme_send_authentication(wpa_s, wpa_s->current_bss,
668 wpa_s->current_ssid, 1);
669 return 0;
670 }
671
672 if (status_code != WLAN_STATUS_SUCCESS)
673 return -1;
674
675 if (auth_transaction == 1) {
676 groups = wpa_s->conf->sae_groups;
677
678 wpa_dbg(wpa_s, MSG_DEBUG, "SME SAE commit");
679 if (wpa_s->current_bss == NULL ||
680 wpa_s->current_ssid == NULL)
681 return -1;
682 if (wpa_s->sme.sae.state != SAE_COMMITTED)
683 return -1;
684 if (groups && groups[0] <= 0)
685 groups = NULL;
686 if (sae_parse_commit(&wpa_s->sme.sae, data, len, NULL, NULL,
687 groups) != WLAN_STATUS_SUCCESS)
688 return -1;
689
690 if (sae_process_commit(&wpa_s->sme.sae) < 0) {
691 wpa_printf(MSG_DEBUG, "SAE: Failed to process peer "
692 "commit");
693 return -1;
694 }
695
696 wpabuf_free(wpa_s->sme.sae_token);
697 wpa_s->sme.sae_token = NULL;
698 sme_send_authentication(wpa_s, wpa_s->current_bss,
699 wpa_s->current_ssid, 0);
700 return 0;
701 } else if (auth_transaction == 2) {
702 wpa_dbg(wpa_s, MSG_DEBUG, "SME SAE confirm");
703 if (wpa_s->sme.sae.state != SAE_CONFIRMED)
704 return -1;
705 if (sae_check_confirm(&wpa_s->sme.sae, data, len) < 0)
706 return -1;
707 wpa_s->sme.sae.state = SAE_ACCEPTED;
708 sae_clear_temp_data(&wpa_s->sme.sae);
709 return 1;
710 }
711
712 return -1;
713 }
714 #endif /* CONFIG_SAE */
715
716
717 void sme_event_auth(struct wpa_supplicant *wpa_s, union wpa_event_data *data)
718 {
719 struct wpa_ssid *ssid = wpa_s->current_ssid;
720
721 if (ssid == NULL) {
722 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Ignore authentication event "
723 "when network is not selected");
724 return;
725 }
726
727 if (wpa_s->wpa_state != WPA_AUTHENTICATING) {
728 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Ignore authentication event "
729 "when not in authenticating state");
730 return;
731 }
732
733 if (os_memcmp(wpa_s->pending_bssid, data->auth.peer, ETH_ALEN) != 0) {
734 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Ignore authentication with "
735 "unexpected peer " MACSTR,
736 MAC2STR(data->auth.peer));
737 return;
738 }
739
740 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Authentication response: peer=" MACSTR
741 " auth_type=%d auth_transaction=%d status_code=%d",
742 MAC2STR(data->auth.peer), data->auth.auth_type,
743 data->auth.auth_transaction, data->auth.status_code);
744 wpa_hexdump(MSG_MSGDUMP, "SME: Authentication response IEs",
745 data->auth.ies, data->auth.ies_len);
746
747 eloop_cancel_timeout(sme_auth_timer, wpa_s, NULL);
748
749 #ifdef CONFIG_SAE
750 if (data->auth.auth_type == WLAN_AUTH_SAE) {
751 int res;
752 res = sme_sae_auth(wpa_s, data->auth.auth_transaction,
753 data->auth.status_code, data->auth.ies,
754 data->auth.ies_len);
755 if (res < 0) {
756 wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
757 wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED);
758
759 }
760 if (res != 1)
761 return;
762
763 wpa_printf(MSG_DEBUG, "SME: SAE completed - setting PMK for "
764 "4-way handshake");
765 wpa_sm_set_pmk(wpa_s->wpa, wpa_s->sme.sae.pmk, PMK_LEN,
766 wpa_s->pending_bssid);
767 }
768 #endif /* CONFIG_SAE */
769
770 if (data->auth.status_code != WLAN_STATUS_SUCCESS) {
771 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Authentication failed (status "
772 "code %d)", data->auth.status_code);
773
774 if (data->auth.status_code !=
775 WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG ||
776 wpa_s->sme.auth_alg == data->auth.auth_type ||
777 wpa_s->current_ssid->auth_alg == WPA_AUTH_ALG_LEAP) {
778 wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
779 wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED);
780 return;
781 }
782
783 wpas_connect_work_done(wpa_s);
784
785 switch (data->auth.auth_type) {
786 case WLAN_AUTH_OPEN:
787 wpa_s->current_ssid->auth_alg = WPA_AUTH_ALG_SHARED;
788
789 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Trying SHARED auth");
790 wpa_supplicant_associate(wpa_s, wpa_s->current_bss,
791 wpa_s->current_ssid);
792 return;
793
794 case WLAN_AUTH_SHARED_KEY:
795 wpa_s->current_ssid->auth_alg = WPA_AUTH_ALG_LEAP;
796
797 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Trying LEAP auth");
798 wpa_supplicant_associate(wpa_s, wpa_s->current_bss,
799 wpa_s->current_ssid);
800 return;
801
802 default:
803 return;
804 }
805 }
806
807 #ifdef CONFIG_IEEE80211R
808 if (data->auth.auth_type == WLAN_AUTH_FT) {
809 union wpa_event_data edata;
810 os_memset(&edata, 0, sizeof(edata));
811 edata.ft_ies.ies = data->auth.ies;
812 edata.ft_ies.ies_len = data->auth.ies_len;
813 os_memcpy(edata.ft_ies.target_ap, data->auth.peer, ETH_ALEN);
814 wpa_supplicant_event(wpa_s, EVENT_FT_RESPONSE, &edata);
815 }
816 #endif /* CONFIG_IEEE80211R */
817
818 sme_associate(wpa_s, ssid->mode, data->auth.peer,
819 data->auth.auth_type);
820 }
821
822
823 void sme_associate(struct wpa_supplicant *wpa_s, enum wpas_mode mode,
824 const u8 *bssid, u16 auth_type)
825 {
826 struct wpa_driver_associate_params params;
827 struct ieee802_11_elems elems;
828 #ifdef CONFIG_HT_OVERRIDES
829 struct ieee80211_ht_capabilities htcaps;
830 struct ieee80211_ht_capabilities htcaps_mask;
831 #endif /* CONFIG_HT_OVERRIDES */
832 #ifdef CONFIG_VHT_OVERRIDES
833 struct ieee80211_vht_capabilities vhtcaps;
834 struct ieee80211_vht_capabilities vhtcaps_mask;
835 #endif /* CONFIG_VHT_OVERRIDES */
836
837 os_memset(&params, 0, sizeof(params));
838 params.bssid = bssid;
839 params.ssid = wpa_s->sme.ssid;
840 params.ssid_len = wpa_s->sme.ssid_len;
841 params.freq.freq = wpa_s->sme.freq;
842 params.bg_scan_period = wpa_s->current_ssid ?
843 wpa_s->current_ssid->bg_scan_period : -1;
844 params.wpa_ie = wpa_s->sme.assoc_req_ie_len ?
845 wpa_s->sme.assoc_req_ie : NULL;
846 params.wpa_ie_len = wpa_s->sme.assoc_req_ie_len;
847 params.pairwise_suite = wpa_s->pairwise_cipher;
848 params.group_suite = wpa_s->group_cipher;
849 params.key_mgmt_suite = wpa_s->key_mgmt;
850 params.wpa_proto = wpa_s->wpa_proto;
851 #ifdef CONFIG_HT_OVERRIDES
852 os_memset(&htcaps, 0, sizeof(htcaps));
853 os_memset(&htcaps_mask, 0, sizeof(htcaps_mask));
854 params.htcaps = (u8 *) &htcaps;
855 params.htcaps_mask = (u8 *) &htcaps_mask;
856 wpa_supplicant_apply_ht_overrides(wpa_s, wpa_s->current_ssid, &params);
857 #endif /* CONFIG_HT_OVERRIDES */
858 #ifdef CONFIG_VHT_OVERRIDES
859 os_memset(&vhtcaps, 0, sizeof(vhtcaps));
860 os_memset(&vhtcaps_mask, 0, sizeof(vhtcaps_mask));
861 params.vhtcaps = &vhtcaps;
862 params.vhtcaps_mask = &vhtcaps_mask;
863 wpa_supplicant_apply_vht_overrides(wpa_s, wpa_s->current_ssid, &params);
864 #endif /* CONFIG_VHT_OVERRIDES */
865 #ifdef CONFIG_IEEE80211R
866 if (auth_type == WLAN_AUTH_FT && wpa_s->sme.ft_ies) {
867 params.wpa_ie = wpa_s->sme.ft_ies;
868 params.wpa_ie_len = wpa_s->sme.ft_ies_len;
869 }
870 #endif /* CONFIG_IEEE80211R */
871 params.mode = mode;
872 params.mgmt_frame_protection = wpa_s->sme.mfp;
873 params.rrm_used = wpa_s->rrm.rrm_used;
874 if (wpa_s->sme.prev_bssid_set)
875 params.prev_bssid = wpa_s->sme.prev_bssid;
876
877 wpa_msg(wpa_s, MSG_INFO, "Trying to associate with " MACSTR
878 " (SSID='%s' freq=%d MHz)", MAC2STR(params.bssid),
879 params.ssid ? wpa_ssid_txt(params.ssid, params.ssid_len) : "",
880 params.freq.freq);
881
882 wpa_supplicant_set_state(wpa_s, WPA_ASSOCIATING);
883
884 if (params.wpa_ie == NULL ||
885 ieee802_11_parse_elems(params.wpa_ie, params.wpa_ie_len, &elems, 0)
886 < 0) {
887 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Could not parse own IEs?!");
888 os_memset(&elems, 0, sizeof(elems));
889 }
890 if (elems.rsn_ie) {
891 params.wpa_proto = WPA_PROTO_RSN;
892 wpa_sm_set_assoc_wpa_ie(wpa_s->wpa, elems.rsn_ie - 2,
893 elems.rsn_ie_len + 2);
894 } else if (elems.wpa_ie) {
895 params.wpa_proto = WPA_PROTO_WPA;
896 wpa_sm_set_assoc_wpa_ie(wpa_s->wpa, elems.wpa_ie - 2,
897 elems.wpa_ie_len + 2);
898 } else if (elems.osen) {
899 params.wpa_proto = WPA_PROTO_OSEN;
900 wpa_sm_set_assoc_wpa_ie(wpa_s->wpa, elems.osen - 2,
901 elems.osen_len + 2);
902 } else
903 wpa_sm_set_assoc_wpa_ie(wpa_s->wpa, NULL, 0);
904 if (wpa_s->current_ssid && wpa_s->current_ssid->p2p_group)
905 params.p2p = 1;
906
907 if (wpa_s->parent->set_sta_uapsd)
908 params.uapsd = wpa_s->parent->sta_uapsd;
909 else
910 params.uapsd = -1;
911
912 if (wpa_drv_associate(wpa_s, &params) < 0) {
913 wpa_msg(wpa_s, MSG_INFO, "SME: Association request to the "
914 "driver failed");
915 wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
916 wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED);
917 os_memset(wpa_s->pending_bssid, 0, ETH_ALEN);
918 return;
919 }
920
921 eloop_register_timeout(SME_ASSOC_TIMEOUT, 0, sme_assoc_timer, wpa_s,
922 NULL);
923 }
924
925
926 int sme_update_ft_ies(struct wpa_supplicant *wpa_s, const u8 *md,
927 const u8 *ies, size_t ies_len)
928 {
929 if (md == NULL || ies == NULL) {
930 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Remove mobility domain");
931 os_free(wpa_s->sme.ft_ies);
932 wpa_s->sme.ft_ies = NULL;
933 wpa_s->sme.ft_ies_len = 0;
934 wpa_s->sme.ft_used = 0;
935 return 0;
936 }
937
938 os_memcpy(wpa_s->sme.mobility_domain, md, MOBILITY_DOMAIN_ID_LEN);
939 wpa_hexdump(MSG_DEBUG, "SME: FT IEs", ies, ies_len);
940 os_free(wpa_s->sme.ft_ies);
941 wpa_s->sme.ft_ies = os_malloc(ies_len);
942 if (wpa_s->sme.ft_ies == NULL)
943 return -1;
944 os_memcpy(wpa_s->sme.ft_ies, ies, ies_len);
945 wpa_s->sme.ft_ies_len = ies_len;
946 return 0;
947 }
948
949
950 static void sme_deauth(struct wpa_supplicant *wpa_s)
951 {
952 int bssid_changed;
953
954 bssid_changed = !is_zero_ether_addr(wpa_s->bssid);
955
956 if (wpa_drv_deauthenticate(wpa_s, wpa_s->pending_bssid,
957 WLAN_REASON_DEAUTH_LEAVING) < 0) {
958 wpa_msg(wpa_s, MSG_INFO, "SME: Deauth request to the driver "
959 "failed");
960 }
961 wpa_s->sme.prev_bssid_set = 0;
962
963 wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
964 wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED);
965 os_memset(wpa_s->bssid, 0, ETH_ALEN);
966 os_memset(wpa_s->pending_bssid, 0, ETH_ALEN);
967 if (bssid_changed)
968 wpas_notify_bssid_changed(wpa_s);
969 }
970
971
972 void sme_event_assoc_reject(struct wpa_supplicant *wpa_s,
973 union wpa_event_data *data)
974 {
975 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Association with " MACSTR " failed: "
976 "status code %d", MAC2STR(wpa_s->pending_bssid),
977 data->assoc_reject.status_code);
978
979 eloop_cancel_timeout(sme_assoc_timer, wpa_s, NULL);
980
981 #ifdef CONFIG_SAE
982 if (wpa_s->sme.sae_pmksa_caching && wpa_s->current_ssid &&
983 wpa_key_mgmt_sae(wpa_s->current_ssid->key_mgmt)) {
984 wpa_dbg(wpa_s, MSG_DEBUG,
985 "PMKSA caching attempt rejected - drop PMKSA cache entry and fall back to SAE authentication");
986 wpa_sm_aborted_cached(wpa_s->wpa);
987 wpa_sm_pmksa_cache_flush(wpa_s->wpa, wpa_s->current_ssid);
988 if (wpa_s->current_bss) {
989 struct wpa_bss *bss = wpa_s->current_bss;
990 struct wpa_ssid *ssid = wpa_s->current_ssid;
991
992 wpa_drv_deauthenticate(wpa_s, wpa_s->pending_bssid,
993 WLAN_REASON_DEAUTH_LEAVING);
994 wpas_connect_work_done(wpa_s);
995 wpa_supplicant_mark_disassoc(wpa_s);
996 wpa_supplicant_connect(wpa_s, bss, ssid);
997 return;
998 }
999 }
1000 #endif /* CONFIG_SAE */
1001
1002 /*
1003 * For now, unconditionally terminate the previous authentication. In
1004 * theory, this should not be needed, but mac80211 gets quite confused
1005 * if the authentication is left pending.. Some roaming cases might
1006 * benefit from using the previous authentication, so this could be
1007 * optimized in the future.
1008 */
1009 sme_deauth(wpa_s);
1010 }
1011
1012
1013 void sme_event_auth_timed_out(struct wpa_supplicant *wpa_s,
1014 union wpa_event_data *data)
1015 {
1016 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Authentication timed out");
1017 wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
1018 wpa_supplicant_mark_disassoc(wpa_s);
1019 }
1020
1021
1022 void sme_event_assoc_timed_out(struct wpa_supplicant *wpa_s,
1023 union wpa_event_data *data)
1024 {
1025 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Association timed out");
1026 wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
1027 wpa_supplicant_mark_disassoc(wpa_s);
1028 }
1029
1030
1031 void sme_event_disassoc(struct wpa_supplicant *wpa_s,
1032 struct disassoc_info *info)
1033 {
1034 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Disassociation event received");
1035 if (wpa_s->sme.prev_bssid_set) {
1036 /*
1037 * cfg80211/mac80211 can get into somewhat confused state if
1038 * the AP only disassociates us and leaves us in authenticated
1039 * state. For now, force the state to be cleared to avoid
1040 * confusing errors if we try to associate with the AP again.
1041 */
1042 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Deauthenticate to clear "
1043 "driver state");
1044 wpa_drv_deauthenticate(wpa_s, wpa_s->sme.prev_bssid,
1045 WLAN_REASON_DEAUTH_LEAVING);
1046 }
1047 }
1048
1049
1050 static void sme_auth_timer(void *eloop_ctx, void *timeout_ctx)
1051 {
1052 struct wpa_supplicant *wpa_s = eloop_ctx;
1053 if (wpa_s->wpa_state == WPA_AUTHENTICATING) {
1054 wpa_msg(wpa_s, MSG_DEBUG, "SME: Authentication timeout");
1055 sme_deauth(wpa_s);
1056 }
1057 }
1058
1059
1060 static void sme_assoc_timer(void *eloop_ctx, void *timeout_ctx)
1061 {
1062 struct wpa_supplicant *wpa_s = eloop_ctx;
1063 if (wpa_s->wpa_state == WPA_ASSOCIATING) {
1064 wpa_msg(wpa_s, MSG_DEBUG, "SME: Association timeout");
1065 sme_deauth(wpa_s);
1066 }
1067 }
1068
1069
1070 void sme_state_changed(struct wpa_supplicant *wpa_s)
1071 {
1072 /* Make sure timers are cleaned up appropriately. */
1073 if (wpa_s->wpa_state != WPA_ASSOCIATING)
1074 eloop_cancel_timeout(sme_assoc_timer, wpa_s, NULL);
1075 if (wpa_s->wpa_state != WPA_AUTHENTICATING)
1076 eloop_cancel_timeout(sme_auth_timer, wpa_s, NULL);
1077 }
1078
1079
1080 void sme_disassoc_while_authenticating(struct wpa_supplicant *wpa_s,
1081 const u8 *prev_pending_bssid)
1082 {
1083 /*
1084 * mac80211-workaround to force deauth on failed auth cmd,
1085 * requires us to remain in authenticating state to allow the
1086 * second authentication attempt to be continued properly.
1087 */
1088 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Allow pending authentication "
1089 "to proceed after disconnection event");
1090 wpa_supplicant_set_state(wpa_s, WPA_AUTHENTICATING);
1091 os_memcpy(wpa_s->pending_bssid, prev_pending_bssid, ETH_ALEN);
1092
1093 /*
1094 * Re-arm authentication timer in case auth fails for whatever reason.
1095 */
1096 eloop_cancel_timeout(sme_auth_timer, wpa_s, NULL);
1097 eloop_register_timeout(SME_AUTH_TIMEOUT, 0, sme_auth_timer, wpa_s,
1098 NULL);
1099 }
1100
1101
1102 void sme_clear_on_disassoc(struct wpa_supplicant *wpa_s)
1103 {
1104 wpa_s->sme.prev_bssid_set = 0;
1105 #ifdef CONFIG_SAE
1106 wpabuf_free(wpa_s->sme.sae_token);
1107 wpa_s->sme.sae_token = NULL;
1108 sae_clear_data(&wpa_s->sme.sae);
1109 #endif /* CONFIG_SAE */
1110 #ifdef CONFIG_IEEE80211R
1111 if (wpa_s->sme.ft_ies)
1112 sme_update_ft_ies(wpa_s, NULL, NULL, 0);
1113 #endif /* CONFIG_IEEE80211R */
1114 }
1115
1116
1117 void sme_deinit(struct wpa_supplicant *wpa_s)
1118 {
1119 os_free(wpa_s->sme.ft_ies);
1120 wpa_s->sme.ft_ies = NULL;
1121 wpa_s->sme.ft_ies_len = 0;
1122 #ifdef CONFIG_IEEE80211W
1123 sme_stop_sa_query(wpa_s);
1124 #endif /* CONFIG_IEEE80211W */
1125 sme_clear_on_disassoc(wpa_s);
1126
1127 eloop_cancel_timeout(sme_assoc_timer, wpa_s, NULL);
1128 eloop_cancel_timeout(sme_auth_timer, wpa_s, NULL);
1129 eloop_cancel_timeout(sme_obss_scan_timeout, wpa_s, NULL);
1130 }
1131
1132
1133 static void sme_send_2040_bss_coex(struct wpa_supplicant *wpa_s,
1134 const u8 *chan_list, u8 num_channels,
1135 u8 num_intol)
1136 {
1137 struct ieee80211_2040_bss_coex_ie *bc_ie;
1138 struct ieee80211_2040_intol_chan_report *ic_report;
1139 struct wpabuf *buf;
1140
1141 wpa_printf(MSG_DEBUG, "SME: Send 20/40 BSS Coexistence to " MACSTR
1142 " (num_channels=%u num_intol=%u)",
1143 MAC2STR(wpa_s->bssid), num_channels, num_intol);
1144 wpa_hexdump(MSG_DEBUG, "SME: 20/40 BSS Intolerant Channels",
1145 chan_list, num_channels);
1146
1147 buf = wpabuf_alloc(2 + /* action.category + action_code */
1148 sizeof(struct ieee80211_2040_bss_coex_ie) +
1149 sizeof(struct ieee80211_2040_intol_chan_report) +
1150 num_channels);
1151 if (buf == NULL)
1152 return;
1153
1154 wpabuf_put_u8(buf, WLAN_ACTION_PUBLIC);
1155 wpabuf_put_u8(buf, WLAN_PA_20_40_BSS_COEX);
1156
1157 bc_ie = wpabuf_put(buf, sizeof(*bc_ie));
1158 bc_ie->element_id = WLAN_EID_20_40_BSS_COEXISTENCE;
1159 bc_ie->length = 1;
1160 if (num_intol)
1161 bc_ie->coex_param |= WLAN_20_40_BSS_COEX_20MHZ_WIDTH_REQ;
1162
1163 if (num_channels > 0) {
1164 ic_report = wpabuf_put(buf, sizeof(*ic_report));
1165 ic_report->element_id = WLAN_EID_20_40_BSS_INTOLERANT;
1166 ic_report->length = num_channels + 1;
1167 ic_report->op_class = 0;
1168 os_memcpy(wpabuf_put(buf, num_channels), chan_list,
1169 num_channels);
1170 }
1171
1172 if (wpa_drv_send_action(wpa_s, wpa_s->assoc_freq, 0, wpa_s->bssid,
1173 wpa_s->own_addr, wpa_s->bssid,
1174 wpabuf_head(buf), wpabuf_len(buf), 0) < 0) {
1175 wpa_msg(wpa_s, MSG_INFO,
1176 "SME: Failed to send 20/40 BSS Coexistence frame");
1177 }
1178
1179 wpabuf_free(buf);
1180 }
1181
1182
1183 int sme_proc_obss_scan(struct wpa_supplicant *wpa_s)
1184 {
1185 struct wpa_bss *bss;
1186 const u8 *ie;
1187 u16 ht_cap;
1188 u8 chan_list[P2P_MAX_CHANNELS], channel;
1189 u8 num_channels = 0, num_intol = 0, i;
1190
1191 if (!wpa_s->sme.sched_obss_scan)
1192 return 0;
1193
1194 wpa_s->sme.sched_obss_scan = 0;
1195 if (!wpa_s->current_bss || wpa_s->wpa_state != WPA_COMPLETED)
1196 return 1;
1197
1198 /*
1199 * Check whether AP uses regulatory triplet or channel triplet in
1200 * country info. Right now the operating class of the BSS channel
1201 * width trigger event is "unknown" (IEEE Std 802.11-2012 10.15.12),
1202 * based on the assumption that operating class triplet is not used in
1203 * beacon frame. If the First Channel Number/Operating Extension
1204 * Identifier octet has a positive integer value of 201 or greater,
1205 * then its operating class triplet.
1206 *
1207 * TODO: If Supported Operating Classes element is present in beacon
1208 * frame, have to lookup operating class in Annex E and fill them in
1209 * 2040 coex frame.
1210 */
1211 ie = wpa_bss_get_ie(wpa_s->current_bss, WLAN_EID_COUNTRY);
1212 if (ie && (ie[1] >= 6) && (ie[5] >= 201))
1213 return 1;
1214
1215 os_memset(chan_list, 0, sizeof(chan_list));
1216
1217 dl_list_for_each(bss, &wpa_s->bss, struct wpa_bss, list) {
1218 /* Skip other band bss */
1219 enum hostapd_hw_mode mode;
1220 mode = ieee80211_freq_to_chan(bss->freq, &channel);
1221 if (mode != HOSTAPD_MODE_IEEE80211G &&
1222 mode != HOSTAPD_MODE_IEEE80211B)
1223 continue;
1224
1225 ie = wpa_bss_get_ie(bss, WLAN_EID_HT_CAP);
1226 ht_cap = (ie && (ie[1] == 26)) ? WPA_GET_LE16(ie + 2) : 0;
1227 wpa_printf(MSG_DEBUG, "SME OBSS scan BSS " MACSTR
1228 " freq=%u chan=%u ht_cap=0x%x",
1229 MAC2STR(bss->bssid), bss->freq, channel, ht_cap);
1230
1231 if (!ht_cap || (ht_cap & HT_CAP_INFO_40MHZ_INTOLERANT)) {
1232 if (ht_cap & HT_CAP_INFO_40MHZ_INTOLERANT)
1233 num_intol++;
1234
1235 /* Check whether the channel is already considered */
1236 for (i = 0; i < num_channels; i++) {
1237 if (channel == chan_list[i])
1238 break;
1239 }
1240 if (i != num_channels)
1241 continue;
1242
1243 chan_list[num_channels++] = channel;
1244 }
1245 }
1246
1247 sme_send_2040_bss_coex(wpa_s, chan_list, num_channels, num_intol);
1248 return 1;
1249 }
1250
1251
1252 static struct hostapd_hw_modes * get_mode(struct hostapd_hw_modes *modes,
1253 u16 num_modes,
1254 enum hostapd_hw_mode mode)
1255 {
1256 u16 i;
1257
1258 for (i = 0; i < num_modes; i++) {
1259 if (modes[i].mode == mode)
1260 return &modes[i];
1261 }
1262
1263 return NULL;
1264 }
1265
1266
1267 static void wpa_obss_scan_freqs_list(struct wpa_supplicant *wpa_s,
1268 struct wpa_driver_scan_params *params)
1269 {
1270 /* Include only affected channels */
1271 struct hostapd_hw_modes *mode;
1272 int count, i;
1273 int start, end;
1274
1275 mode = get_mode(wpa_s->hw.modes, wpa_s->hw.num_modes,
1276 HOSTAPD_MODE_IEEE80211G);
1277 if (mode == NULL) {
1278 /* No channels supported in this band - use empty list */
1279 params->freqs = os_zalloc(sizeof(int));
1280 return;
1281 }
1282
1283 if (wpa_s->sme.ht_sec_chan == HT_SEC_CHAN_UNKNOWN &&
1284 wpa_s->current_bss) {
1285 const u8 *ie;
1286
1287 ie = wpa_bss_get_ie(wpa_s->current_bss, WLAN_EID_HT_OPERATION);
1288 if (ie && ie[1] >= 2) {
1289 u8 o;
1290
1291 o = ie[3] & HT_INFO_HT_PARAM_SECONDARY_CHNL_OFF_MASK;
1292 if (o == HT_INFO_HT_PARAM_SECONDARY_CHNL_ABOVE)
1293 wpa_s->sme.ht_sec_chan = HT_SEC_CHAN_ABOVE;
1294 else if (o == HT_INFO_HT_PARAM_SECONDARY_CHNL_BELOW)
1295 wpa_s->sme.ht_sec_chan = HT_SEC_CHAN_BELOW;
1296 }
1297 }
1298
1299 start = wpa_s->assoc_freq - 10;
1300 end = wpa_s->assoc_freq + 10;
1301 switch (wpa_s->sme.ht_sec_chan) {
1302 case HT_SEC_CHAN_UNKNOWN:
1303 /* HT40+ possible on channels 1..9 */
1304 if (wpa_s->assoc_freq <= 2452)
1305 start -= 20;
1306 /* HT40- possible on channels 5-13 */
1307 if (wpa_s->assoc_freq >= 2432)
1308 end += 20;
1309 break;
1310 case HT_SEC_CHAN_ABOVE:
1311 end += 20;
1312 break;
1313 case HT_SEC_CHAN_BELOW:
1314 start -= 20;
1315 break;
1316 }
1317 wpa_printf(MSG_DEBUG,
1318 "OBSS: assoc_freq %d possible affected range %d-%d",
1319 wpa_s->assoc_freq, start, end);
1320
1321 params->freqs = os_calloc(mode->num_channels + 1, sizeof(int));
1322 if (params->freqs == NULL)
1323 return;
1324 for (count = 0, i = 0; i < mode->num_channels; i++) {
1325 int freq;
1326
1327 if (mode->channels[i].flag & HOSTAPD_CHAN_DISABLED)
1328 continue;
1329 freq = mode->channels[i].freq;
1330 if (freq - 10 >= end || freq + 10 <= start)
1331 continue; /* not affected */
1332 params->freqs[count++] = freq;
1333 }
1334 }
1335
1336
1337 static void sme_obss_scan_timeout(void *eloop_ctx, void *timeout_ctx)
1338 {
1339 struct wpa_supplicant *wpa_s = eloop_ctx;
1340 struct wpa_driver_scan_params params;
1341
1342 if (!wpa_s->current_bss) {
1343 wpa_printf(MSG_DEBUG, "SME OBSS: Ignore scan request");
1344 return;
1345 }
1346
1347 os_memset(&params, 0, sizeof(params));
1348 wpa_obss_scan_freqs_list(wpa_s, &params);
1349 params.low_priority = 1;
1350 wpa_printf(MSG_DEBUG, "SME OBSS: Request an OBSS scan");
1351
1352 if (wpa_supplicant_trigger_scan(wpa_s, &params))
1353 wpa_printf(MSG_DEBUG, "SME OBSS: Failed to trigger scan");
1354 else
1355 wpa_s->sme.sched_obss_scan = 1;
1356 os_free(params.freqs);
1357
1358 eloop_register_timeout(wpa_s->sme.obss_scan_int, 0,
1359 sme_obss_scan_timeout, wpa_s, NULL);
1360 }
1361
1362
1363 void sme_sched_obss_scan(struct wpa_supplicant *wpa_s, int enable)
1364 {
1365 const u8 *ie;
1366 struct wpa_bss *bss = wpa_s->current_bss;
1367 struct wpa_ssid *ssid = wpa_s->current_ssid;
1368 struct hostapd_hw_modes *hw_mode = NULL;
1369 int i;
1370
1371 eloop_cancel_timeout(sme_obss_scan_timeout, wpa_s, NULL);
1372 wpa_s->sme.sched_obss_scan = 0;
1373 wpa_s->sme.ht_sec_chan = HT_SEC_CHAN_UNKNOWN;
1374 if (!enable)
1375 return;
1376
1377 /*
1378 * Schedule OBSS scan if driver is using station SME in wpa_supplicant
1379 * or it expects OBSS scan to be performed by wpa_supplicant.
1380 */
1381 if (!((wpa_s->drv_flags & WPA_DRIVER_FLAGS_SME) ||
1382 (wpa_s->drv_flags & WPA_DRIVER_FLAGS_OBSS_SCAN)) ||
1383 ssid == NULL || ssid->mode != IEEE80211_MODE_INFRA)
1384 return;
1385
1386 if (!wpa_s->hw.modes)
1387 return;
1388
1389 /* only HT caps in 11g mode are relevant */
1390 for (i = 0; i < wpa_s->hw.num_modes; i++) {
1391 hw_mode = &wpa_s->hw.modes[i];
1392 if (hw_mode->mode == HOSTAPD_MODE_IEEE80211G)
1393 break;
1394 }
1395
1396 /* Driver does not support HT40 for 11g or doesn't have 11g. */
1397 if (i == wpa_s->hw.num_modes || !hw_mode ||
1398 !(hw_mode->ht_capab & HT_CAP_INFO_SUPP_CHANNEL_WIDTH_SET))
1399 return;
1400
1401 if (bss == NULL || bss->freq < 2400 || bss->freq > 2500)
1402 return; /* Not associated on 2.4 GHz band */
1403
1404 /* Check whether AP supports HT40 */
1405 ie = wpa_bss_get_ie(wpa_s->current_bss, WLAN_EID_HT_CAP);
1406 if (!ie || ie[1] < 2 ||
1407 !(WPA_GET_LE16(ie + 2) & HT_CAP_INFO_SUPP_CHANNEL_WIDTH_SET))
1408 return; /* AP does not support HT40 */
1409
1410 ie = wpa_bss_get_ie(wpa_s->current_bss,
1411 WLAN_EID_OVERLAPPING_BSS_SCAN_PARAMS);
1412 if (!ie || ie[1] < 14)
1413 return; /* AP does not request OBSS scans */
1414
1415 wpa_s->sme.obss_scan_int = WPA_GET_LE16(ie + 6);
1416 if (wpa_s->sme.obss_scan_int < 10) {
1417 wpa_printf(MSG_DEBUG, "SME: Invalid OBSS Scan Interval %u "
1418 "replaced with the minimum 10 sec",
1419 wpa_s->sme.obss_scan_int);
1420 wpa_s->sme.obss_scan_int = 10;
1421 }
1422 wpa_printf(MSG_DEBUG, "SME: OBSS Scan Interval %u sec",
1423 wpa_s->sme.obss_scan_int);
1424 eloop_register_timeout(wpa_s->sme.obss_scan_int, 0,
1425 sme_obss_scan_timeout, wpa_s, NULL);
1426 }
1427
1428
1429 #ifdef CONFIG_IEEE80211W
1430
1431 static const unsigned int sa_query_max_timeout = 1000;
1432 static const unsigned int sa_query_retry_timeout = 201;
1433
1434 static int sme_check_sa_query_timeout(struct wpa_supplicant *wpa_s)
1435 {
1436 u32 tu;
1437 struct os_reltime now, passed;
1438 os_get_reltime(&now);
1439 os_reltime_sub(&now, &wpa_s->sme.sa_query_start, &passed);
1440 tu = (passed.sec * 1000000 + passed.usec) / 1024;
1441 if (sa_query_max_timeout < tu) {
1442 wpa_dbg(wpa_s, MSG_DEBUG, "SME: SA Query timed out");
1443 sme_stop_sa_query(wpa_s);
1444 wpa_supplicant_deauthenticate(
1445 wpa_s, WLAN_REASON_PREV_AUTH_NOT_VALID);
1446 return 1;
1447 }
1448
1449 return 0;
1450 }
1451
1452
1453 static void sme_send_sa_query_req(struct wpa_supplicant *wpa_s,
1454 const u8 *trans_id)
1455 {
1456 u8 req[2 + WLAN_SA_QUERY_TR_ID_LEN];
1457 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Sending SA Query Request to "
1458 MACSTR, MAC2STR(wpa_s->bssid));
1459 wpa_hexdump(MSG_DEBUG, "SME: SA Query Transaction ID",
1460 trans_id, WLAN_SA_QUERY_TR_ID_LEN);
1461 req[0] = WLAN_ACTION_SA_QUERY;
1462 req[1] = WLAN_SA_QUERY_REQUEST;
1463 os_memcpy(req + 2, trans_id, WLAN_SA_QUERY_TR_ID_LEN);
1464 if (wpa_drv_send_action(wpa_s, wpa_s->assoc_freq, 0, wpa_s->bssid,
1465 wpa_s->own_addr, wpa_s->bssid,
1466 req, sizeof(req), 0) < 0)
1467 wpa_msg(wpa_s, MSG_INFO, "SME: Failed to send SA Query "
1468 "Request");
1469 }
1470
1471
1472 static void sme_sa_query_timer(void *eloop_ctx, void *timeout_ctx)
1473 {
1474 struct wpa_supplicant *wpa_s = eloop_ctx;
1475 unsigned int timeout, sec, usec;
1476 u8 *trans_id, *nbuf;
1477
1478 if (wpa_s->sme.sa_query_count > 0 &&
1479 sme_check_sa_query_timeout(wpa_s))
1480 return;
1481
1482 nbuf = os_realloc_array(wpa_s->sme.sa_query_trans_id,
1483 wpa_s->sme.sa_query_count + 1,
1484 WLAN_SA_QUERY_TR_ID_LEN);
1485 if (nbuf == NULL)
1486 return;
1487 if (wpa_s->sme.sa_query_count == 0) {
1488 /* Starting a new SA Query procedure */
1489 os_get_reltime(&wpa_s->sme.sa_query_start);
1490 }
1491 trans_id = nbuf + wpa_s->sme.sa_query_count * WLAN_SA_QUERY_TR_ID_LEN;
1492 wpa_s->sme.sa_query_trans_id = nbuf;
1493 wpa_s->sme.sa_query_count++;
1494
1495 if (os_get_random(trans_id, WLAN_SA_QUERY_TR_ID_LEN) < 0) {
1496 wpa_printf(MSG_DEBUG, "Could not generate SA Query ID");
1497 return;
1498 }
1499
1500 timeout = sa_query_retry_timeout;
1501 sec = ((timeout / 1000) * 1024) / 1000;
1502 usec = (timeout % 1000) * 1024;
1503 eloop_register_timeout(sec, usec, sme_sa_query_timer, wpa_s, NULL);
1504
1505 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Association SA Query attempt %d",
1506 wpa_s->sme.sa_query_count);
1507
1508 sme_send_sa_query_req(wpa_s, trans_id);
1509 }
1510
1511
1512 static void sme_start_sa_query(struct wpa_supplicant *wpa_s)
1513 {
1514 sme_sa_query_timer(wpa_s, NULL);
1515 }
1516
1517
1518 static void sme_stop_sa_query(struct wpa_supplicant *wpa_s)
1519 {
1520 eloop_cancel_timeout(sme_sa_query_timer, wpa_s, NULL);
1521 os_free(wpa_s->sme.sa_query_trans_id);
1522 wpa_s->sme.sa_query_trans_id = NULL;
1523 wpa_s->sme.sa_query_count = 0;
1524 }
1525
1526
1527 void sme_event_unprot_disconnect(struct wpa_supplicant *wpa_s, const u8 *sa,
1528 const u8 *da, u16 reason_code)
1529 {
1530 struct wpa_ssid *ssid;
1531 struct os_reltime now;
1532
1533 if (wpa_s->wpa_state != WPA_COMPLETED)
1534 return;
1535 ssid = wpa_s->current_ssid;
1536 if (ssid == NULL ||
1537 (ssid->ieee80211w == MGMT_FRAME_PROTECTION_DEFAULT ?
1538 wpa_s->conf->pmf : ssid->ieee80211w) == NO_MGMT_FRAME_PROTECTION)
1539 return;
1540 if (os_memcmp(sa, wpa_s->bssid, ETH_ALEN) != 0)
1541 return;
1542 if (reason_code != WLAN_REASON_CLASS2_FRAME_FROM_NONAUTH_STA &&
1543 reason_code != WLAN_REASON_CLASS3_FRAME_FROM_NONASSOC_STA)
1544 return;
1545 if (wpa_s->sme.sa_query_count > 0)
1546 return;
1547
1548 os_get_reltime(&now);
1549 if (wpa_s->sme.last_unprot_disconnect.sec &&
1550 !os_reltime_expired(&now, &wpa_s->sme.last_unprot_disconnect, 10))
1551 return; /* limit SA Query procedure frequency */
1552 wpa_s->sme.last_unprot_disconnect = now;
1553
1554 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Unprotected disconnect dropped - "
1555 "possible AP/STA state mismatch - trigger SA Query");
1556 sme_start_sa_query(wpa_s);
1557 }
1558
1559
1560 void sme_sa_query_rx(struct wpa_supplicant *wpa_s, const u8 *sa,
1561 const u8 *data, size_t len)
1562 {
1563 int i;
1564
1565 if (wpa_s->sme.sa_query_trans_id == NULL ||
1566 len < 1 + WLAN_SA_QUERY_TR_ID_LEN ||
1567 data[0] != WLAN_SA_QUERY_RESPONSE)
1568 return;
1569 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Received SA Query response from "
1570 MACSTR " (trans_id %02x%02x)", MAC2STR(sa), data[1], data[2]);
1571
1572 if (os_memcmp(sa, wpa_s->bssid, ETH_ALEN) != 0)
1573 return;
1574
1575 for (i = 0; i < wpa_s->sme.sa_query_count; i++) {
1576 if (os_memcmp(wpa_s->sme.sa_query_trans_id +
1577 i * WLAN_SA_QUERY_TR_ID_LEN,
1578 data + 1, WLAN_SA_QUERY_TR_ID_LEN) == 0)
1579 break;
1580 }
1581
1582 if (i >= wpa_s->sme.sa_query_count) {
1583 wpa_dbg(wpa_s, MSG_DEBUG, "SME: No matching SA Query "
1584 "transaction identifier found");
1585 return;
1586 }
1587
1588 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Reply to pending SA Query received "
1589 "from " MACSTR, MAC2STR(sa));
1590 sme_stop_sa_query(wpa_s);
1591 }
1592
1593 #endif /* CONFIG_IEEE80211W */
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