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[thirdparty/hostap.git] / wpa_supplicant / sme.c
1 /*
2 * wpa_supplicant - SME
3 * Copyright (c) 2009-2014, Jouni Malinen <j@w1.fi>
4 *
5 * This software may be distributed under the terms of the BSD license.
6 * See README for more details.
7 */
8
9 #include "includes.h"
10
11 #include "common.h"
12 #include "utils/eloop.h"
13 #include "common/ieee802_11_defs.h"
14 #include "common/ieee802_11_common.h"
15 #include "eapol_supp/eapol_supp_sm.h"
16 #include "common/wpa_common.h"
17 #include "common/sae.h"
18 #include "rsn_supp/wpa.h"
19 #include "rsn_supp/pmksa_cache.h"
20 #include "config.h"
21 #include "wpa_supplicant_i.h"
22 #include "driver_i.h"
23 #include "wpas_glue.h"
24 #include "wps_supplicant.h"
25 #include "p2p_supplicant.h"
26 #include "notify.h"
27 #include "bss.h"
28 #include "scan.h"
29 #include "sme.h"
30 #include "hs20_supplicant.h"
31
32 #define SME_AUTH_TIMEOUT 5
33 #define SME_ASSOC_TIMEOUT 5
34
35 static void sme_auth_timer(void *eloop_ctx, void *timeout_ctx);
36 static void sme_assoc_timer(void *eloop_ctx, void *timeout_ctx);
37 static void sme_obss_scan_timeout(void *eloop_ctx, void *timeout_ctx);
38 #ifdef CONFIG_IEEE80211W
39 static void sme_stop_sa_query(struct wpa_supplicant *wpa_s);
40 #endif /* CONFIG_IEEE80211W */
41
42
43 #ifdef CONFIG_SAE
44
45 static int index_within_array(const int *array, int idx)
46 {
47 int i;
48 for (i = 0; i < idx; i++) {
49 if (array[i] <= 0)
50 return 0;
51 }
52 return 1;
53 }
54
55
56 static int sme_set_sae_group(struct wpa_supplicant *wpa_s)
57 {
58 int *groups = wpa_s->conf->sae_groups;
59 int default_groups[] = { 19, 20, 21, 25, 26, 0 };
60
61 if (!groups || groups[0] <= 0)
62 groups = default_groups;
63
64 /* Configuration may have changed, so validate current index */
65 if (!index_within_array(groups, wpa_s->sme.sae_group_index))
66 return -1;
67
68 for (;;) {
69 int group = groups[wpa_s->sme.sae_group_index];
70 if (group < 0)
71 break;
72 if (sae_set_group(&wpa_s->sme.sae, group) == 0) {
73 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Selected SAE group %d",
74 wpa_s->sme.sae.group);
75 return 0;
76 }
77 wpa_s->sme.sae_group_index++;
78 }
79
80 return -1;
81 }
82
83
84 static struct wpabuf * sme_auth_build_sae_commit(struct wpa_supplicant *wpa_s,
85 struct wpa_ssid *ssid,
86 const u8 *bssid)
87 {
88 struct wpabuf *buf;
89 size_t len;
90
91 if (ssid->passphrase == NULL) {
92 wpa_printf(MSG_DEBUG, "SAE: No password available");
93 return NULL;
94 }
95
96 if (sme_set_sae_group(wpa_s) < 0) {
97 wpa_printf(MSG_DEBUG, "SAE: Failed to select group");
98 return NULL;
99 }
100
101 if (sae_prepare_commit(wpa_s->own_addr, bssid,
102 (u8 *) ssid->passphrase,
103 os_strlen(ssid->passphrase),
104 &wpa_s->sme.sae) < 0) {
105 wpa_printf(MSG_DEBUG, "SAE: Could not pick PWE");
106 return NULL;
107 }
108
109 len = wpa_s->sme.sae_token ? wpabuf_len(wpa_s->sme.sae_token) : 0;
110 buf = wpabuf_alloc(4 + SAE_COMMIT_MAX_LEN + len);
111 if (buf == NULL)
112 return NULL;
113
114 wpabuf_put_le16(buf, 1); /* Transaction seq# */
115 wpabuf_put_le16(buf, WLAN_STATUS_SUCCESS);
116 sae_write_commit(&wpa_s->sme.sae, buf, wpa_s->sme.sae_token);
117
118 return buf;
119 }
120
121
122 static struct wpabuf * sme_auth_build_sae_confirm(struct wpa_supplicant *wpa_s)
123 {
124 struct wpabuf *buf;
125
126 buf = wpabuf_alloc(4 + SAE_CONFIRM_MAX_LEN);
127 if (buf == NULL)
128 return NULL;
129
130 wpabuf_put_le16(buf, 2); /* Transaction seq# */
131 wpabuf_put_le16(buf, WLAN_STATUS_SUCCESS);
132 sae_write_confirm(&wpa_s->sme.sae, buf);
133
134 return buf;
135 }
136
137 #endif /* CONFIG_SAE */
138
139
140 /**
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_parse_wpa_ie(rsn, 2 + rsn[1], &ied) == 0) {
264 if (wpa_key_mgmt_sae(ied.key_mgmt)) {
265 wpa_dbg(wpa_s, MSG_DEBUG, "Using SAE auth_alg");
266 params.auth_alg = WPA_AUTH_ALG_SAE;
267 }
268 }
269 }
270 #endif /* CONFIG_SAE */
271
272 for (i = 0; i < NUM_WEP_KEYS; i++) {
273 if (ssid->wep_key_len[i])
274 params.wep_key[i] = ssid->wep_key[i];
275 params.wep_key_len[i] = ssid->wep_key_len[i];
276 }
277 params.wep_tx_keyidx = ssid->wep_tx_keyidx;
278
279 bssid_changed = !is_zero_ether_addr(wpa_s->bssid);
280 os_memset(wpa_s->bssid, 0, ETH_ALEN);
281 os_memcpy(wpa_s->pending_bssid, bss->bssid, ETH_ALEN);
282 if (bssid_changed)
283 wpas_notify_bssid_changed(wpa_s);
284
285 if ((wpa_bss_get_vendor_ie(bss, WPA_IE_VENDOR_TYPE) ||
286 wpa_bss_get_ie(bss, WLAN_EID_RSN)) &&
287 wpa_key_mgmt_wpa(ssid->key_mgmt)) {
288 int try_opportunistic;
289 try_opportunistic = (ssid->proactive_key_caching < 0 ?
290 wpa_s->conf->okc :
291 ssid->proactive_key_caching) &&
292 (ssid->proto & WPA_PROTO_RSN);
293 if (pmksa_cache_set_current(wpa_s->wpa, NULL, bss->bssid,
294 wpa_s->current_ssid,
295 try_opportunistic) == 0)
296 eapol_sm_notify_pmkid_attempt(wpa_s->eapol, 1);
297 wpa_s->sme.assoc_req_ie_len = sizeof(wpa_s->sme.assoc_req_ie);
298 if (wpa_supplicant_set_suites(wpa_s, bss, ssid,
299 wpa_s->sme.assoc_req_ie,
300 &wpa_s->sme.assoc_req_ie_len)) {
301 wpa_msg(wpa_s, MSG_WARNING, "SME: Failed to set WPA "
302 "key management and encryption suites");
303 wpas_connect_work_done(wpa_s);
304 return;
305 }
306 } else if ((ssid->key_mgmt & WPA_KEY_MGMT_IEEE8021X_NO_WPA) &&
307 wpa_key_mgmt_wpa_ieee8021x(ssid->key_mgmt)) {
308 /*
309 * Both WPA and non-WPA IEEE 802.1X enabled in configuration -
310 * use non-WPA since the scan results did not indicate that the
311 * AP is using WPA or WPA2.
312 */
313 wpa_supplicant_set_non_wpa_policy(wpa_s, ssid);
314 wpa_s->sme.assoc_req_ie_len = 0;
315 } else if (wpa_key_mgmt_wpa_any(ssid->key_mgmt)) {
316 wpa_s->sme.assoc_req_ie_len = sizeof(wpa_s->sme.assoc_req_ie);
317 if (wpa_supplicant_set_suites(wpa_s, NULL, ssid,
318 wpa_s->sme.assoc_req_ie,
319 &wpa_s->sme.assoc_req_ie_len)) {
320 wpa_msg(wpa_s, MSG_WARNING, "SME: Failed to set WPA "
321 "key management and encryption suites (no "
322 "scan results)");
323 wpas_connect_work_done(wpa_s);
324 return;
325 }
326 #ifdef CONFIG_WPS
327 } else if (ssid->key_mgmt & WPA_KEY_MGMT_WPS) {
328 struct wpabuf *wps_ie;
329 wps_ie = wps_build_assoc_req_ie(wpas_wps_get_req_type(ssid));
330 if (wps_ie && wpabuf_len(wps_ie) <=
331 sizeof(wpa_s->sme.assoc_req_ie)) {
332 wpa_s->sme.assoc_req_ie_len = wpabuf_len(wps_ie);
333 os_memcpy(wpa_s->sme.assoc_req_ie, wpabuf_head(wps_ie),
334 wpa_s->sme.assoc_req_ie_len);
335 } else
336 wpa_s->sme.assoc_req_ie_len = 0;
337 wpabuf_free(wps_ie);
338 wpa_supplicant_set_non_wpa_policy(wpa_s, ssid);
339 #endif /* CONFIG_WPS */
340 } else {
341 wpa_supplicant_set_non_wpa_policy(wpa_s, ssid);
342 wpa_s->sme.assoc_req_ie_len = 0;
343 }
344
345 #ifdef CONFIG_IEEE80211R
346 ie = wpa_bss_get_ie(bss, WLAN_EID_MOBILITY_DOMAIN);
347 if (ie && ie[1] >= MOBILITY_DOMAIN_ID_LEN)
348 md = ie + 2;
349 wpa_sm_set_ft_params(wpa_s->wpa, ie, ie ? 2 + ie[1] : 0);
350 if (md) {
351 /* Prepare for the next transition */
352 wpa_ft_prepare_auth_request(wpa_s->wpa, ie);
353 }
354
355 if (md && wpa_key_mgmt_ft(ssid->key_mgmt)) {
356 if (wpa_s->sme.assoc_req_ie_len + 5 <
357 sizeof(wpa_s->sme.assoc_req_ie)) {
358 struct rsn_mdie *mdie;
359 u8 *pos = wpa_s->sme.assoc_req_ie +
360 wpa_s->sme.assoc_req_ie_len;
361 *pos++ = WLAN_EID_MOBILITY_DOMAIN;
362 *pos++ = sizeof(*mdie);
363 mdie = (struct rsn_mdie *) pos;
364 os_memcpy(mdie->mobility_domain, md,
365 MOBILITY_DOMAIN_ID_LEN);
366 mdie->ft_capab = md[MOBILITY_DOMAIN_ID_LEN];
367 wpa_s->sme.assoc_req_ie_len += 5;
368 }
369
370 if (wpa_s->sme.ft_used &&
371 os_memcmp(md, wpa_s->sme.mobility_domain, 2) == 0 &&
372 wpa_sm_has_ptk(wpa_s->wpa)) {
373 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Trying to use FT "
374 "over-the-air");
375 params.auth_alg = WPA_AUTH_ALG_FT;
376 params.ie = wpa_s->sme.ft_ies;
377 params.ie_len = wpa_s->sme.ft_ies_len;
378 }
379 }
380 #endif /* CONFIG_IEEE80211R */
381
382 #ifdef CONFIG_IEEE80211W
383 wpa_s->sme.mfp = ssid->ieee80211w == MGMT_FRAME_PROTECTION_DEFAULT ?
384 wpa_s->conf->pmf : ssid->ieee80211w;
385 if (wpa_s->sme.mfp != NO_MGMT_FRAME_PROTECTION) {
386 const u8 *rsn = wpa_bss_get_ie(bss, WLAN_EID_RSN);
387 struct wpa_ie_data _ie;
388 if (rsn && wpa_parse_wpa_ie(rsn, 2 + rsn[1], &_ie) == 0 &&
389 _ie.capabilities &
390 (WPA_CAPABILITY_MFPC | WPA_CAPABILITY_MFPR)) {
391 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Selected AP supports "
392 "MFP: require MFP");
393 wpa_s->sme.mfp = MGMT_FRAME_PROTECTION_REQUIRED;
394 }
395 }
396 #endif /* CONFIG_IEEE80211W */
397
398 #ifdef CONFIG_P2P
399 if (wpa_s->global->p2p) {
400 u8 *pos;
401 size_t len;
402 int res;
403 pos = wpa_s->sme.assoc_req_ie + wpa_s->sme.assoc_req_ie_len;
404 len = sizeof(wpa_s->sme.assoc_req_ie) -
405 wpa_s->sme.assoc_req_ie_len;
406 res = wpas_p2p_assoc_req_ie(wpa_s, bss, pos, len,
407 ssid->p2p_group);
408 if (res >= 0)
409 wpa_s->sme.assoc_req_ie_len += res;
410 }
411 #endif /* CONFIG_P2P */
412
413 #ifdef CONFIG_HS20
414 if (is_hs20_network(wpa_s, ssid, bss)) {
415 struct wpabuf *hs20;
416 hs20 = wpabuf_alloc(20);
417 if (hs20) {
418 int pps_mo_id = hs20_get_pps_mo_id(wpa_s, ssid);
419 size_t len;
420
421 wpas_hs20_add_indication(hs20, pps_mo_id);
422 len = sizeof(wpa_s->sme.assoc_req_ie) -
423 wpa_s->sme.assoc_req_ie_len;
424 if (wpabuf_len(hs20) <= len) {
425 os_memcpy(wpa_s->sme.assoc_req_ie +
426 wpa_s->sme.assoc_req_ie_len,
427 wpabuf_head(hs20), wpabuf_len(hs20));
428 wpa_s->sme.assoc_req_ie_len += wpabuf_len(hs20);
429 }
430 wpabuf_free(hs20);
431 }
432 }
433 #endif /* CONFIG_HS20 */
434
435 ext_capab_len = wpas_build_ext_capab(wpa_s, ext_capab,
436 sizeof(ext_capab));
437 if (ext_capab_len > 0) {
438 u8 *pos = wpa_s->sme.assoc_req_ie;
439 if (wpa_s->sme.assoc_req_ie_len > 0 && pos[0] == WLAN_EID_RSN)
440 pos += 2 + pos[1];
441 os_memmove(pos + ext_capab_len, pos,
442 wpa_s->sme.assoc_req_ie_len -
443 (pos - wpa_s->sme.assoc_req_ie));
444 wpa_s->sme.assoc_req_ie_len += ext_capab_len;
445 os_memcpy(pos, ext_capab, ext_capab_len);
446 }
447
448 sme_auth_handle_rrm(wpa_s, bss);
449
450 #ifdef CONFIG_SAE
451 if (params.auth_alg == WPA_AUTH_ALG_SAE &&
452 pmksa_cache_set_current(wpa_s->wpa, NULL, bss->bssid, ssid, 0) == 0)
453 {
454 wpa_dbg(wpa_s, MSG_DEBUG,
455 "PMKSA cache entry found - try to use PMKSA caching instead of new SAE authentication");
456 params.auth_alg = WPA_AUTH_ALG_OPEN;
457 wpa_s->sme.sae_pmksa_caching = 1;
458 }
459
460 if (params.auth_alg == WPA_AUTH_ALG_SAE) {
461 if (start)
462 resp = sme_auth_build_sae_commit(wpa_s, ssid,
463 bss->bssid);
464 else
465 resp = sme_auth_build_sae_confirm(wpa_s);
466 if (resp == NULL) {
467 wpas_connection_failed(wpa_s, bss->bssid);
468 return;
469 }
470 params.sae_data = wpabuf_head(resp);
471 params.sae_data_len = wpabuf_len(resp);
472 wpa_s->sme.sae.state = start ? SAE_COMMITTED : SAE_CONFIRMED;
473 }
474 #endif /* CONFIG_SAE */
475
476 wpa_supplicant_cancel_sched_scan(wpa_s);
477 wpa_supplicant_cancel_scan(wpa_s);
478
479 wpa_msg(wpa_s, MSG_INFO, "SME: Trying to authenticate with " MACSTR
480 " (SSID='%s' freq=%d MHz)", MAC2STR(params.bssid),
481 wpa_ssid_txt(params.ssid, params.ssid_len), params.freq);
482
483 wpa_clear_keys(wpa_s, bss->bssid);
484 wpa_supplicant_set_state(wpa_s, WPA_AUTHENTICATING);
485 old_ssid = wpa_s->current_ssid;
486 wpa_s->current_ssid = ssid;
487 wpa_supplicant_rsn_supp_set_config(wpa_s, wpa_s->current_ssid);
488 wpa_supplicant_initiate_eapol(wpa_s);
489 if (old_ssid != wpa_s->current_ssid)
490 wpas_notify_network_changed(wpa_s);
491
492 #ifdef CONFIG_P2P
493 /*
494 * If multi-channel concurrency is not supported, check for any
495 * frequency conflict. In case of any frequency conflict, remove the
496 * least prioritized connection.
497 */
498 if (wpa_s->num_multichan_concurrent < 2) {
499 int freq, num;
500 num = get_shared_radio_freqs(wpa_s, &freq, 1);
501 if (num > 0 && freq > 0 && freq != params.freq) {
502 wpa_printf(MSG_DEBUG,
503 "Conflicting frequency found (%d != %d)",
504 freq, params.freq);
505 if (wpas_p2p_handle_frequency_conflicts(wpa_s,
506 params.freq,
507 ssid) < 0) {
508 wpas_connection_failed(wpa_s, bss->bssid);
509 wpa_supplicant_mark_disassoc(wpa_s);
510 wpabuf_free(resp);
511 wpas_connect_work_done(wpa_s);
512 return;
513 }
514 }
515 }
516 #endif /* CONFIG_P2P */
517
518 wpa_s->sme.auth_alg = params.auth_alg;
519 if (wpa_drv_authenticate(wpa_s, &params) < 0) {
520 wpa_msg(wpa_s, MSG_INFO, "SME: Authentication request to the "
521 "driver failed");
522 wpas_connection_failed(wpa_s, bss->bssid);
523 wpa_supplicant_mark_disassoc(wpa_s);
524 wpabuf_free(resp);
525 wpas_connect_work_done(wpa_s);
526 return;
527 }
528
529 eloop_register_timeout(SME_AUTH_TIMEOUT, 0, sme_auth_timer, wpa_s,
530 NULL);
531
532 /*
533 * Association will be started based on the authentication event from
534 * the driver.
535 */
536
537 wpabuf_free(resp);
538 }
539
540
541 static void sme_auth_start_cb(struct wpa_radio_work *work, int deinit)
542 {
543 struct wpa_connect_work *cwork = work->ctx;
544 struct wpa_supplicant *wpa_s = work->wpa_s;
545
546 if (deinit) {
547 if (work->started)
548 wpa_s->connect_work = NULL;
549
550 wpas_connect_work_free(cwork);
551 return;
552 }
553
554 wpa_s->connect_work = work;
555
556 if (cwork->bss_removed ||
557 !wpas_valid_bss_ssid(wpa_s, cwork->bss, cwork->ssid)) {
558 wpa_dbg(wpa_s, MSG_DEBUG, "SME: BSS/SSID entry for authentication not valid anymore - drop connection attempt");
559 wpas_connect_work_done(wpa_s);
560 return;
561 }
562
563 sme_send_authentication(wpa_s, cwork->bss, cwork->ssid, 1);
564 }
565
566
567 void sme_authenticate(struct wpa_supplicant *wpa_s,
568 struct wpa_bss *bss, struct wpa_ssid *ssid)
569 {
570 struct wpa_connect_work *cwork;
571
572 if (bss == NULL || ssid == NULL)
573 return;
574 if (wpa_s->connect_work) {
575 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Reject sme_authenticate() call since connect_work exist");
576 return;
577 }
578
579 if (radio_work_pending(wpa_s, "sme-connect")) {
580 /*
581 * The previous sme-connect work might no longer be valid due to
582 * the fact that the BSS list was updated. In addition, it makes
583 * sense to adhere to the 'newer' decision.
584 */
585 wpa_dbg(wpa_s, MSG_DEBUG,
586 "SME: Remove previous pending sme-connect");
587 radio_remove_works(wpa_s, "sme-connect", 0);
588 }
589
590 cwork = os_zalloc(sizeof(*cwork));
591 if (cwork == NULL)
592 return;
593 cwork->bss = bss;
594 cwork->ssid = ssid;
595 cwork->sme = 1;
596
597 #ifdef CONFIG_SAE
598 wpa_s->sme.sae.state = SAE_NOTHING;
599 wpa_s->sme.sae.send_confirm = 0;
600 wpa_s->sme.sae_group_index = 0;
601 #endif /* CONFIG_SAE */
602
603 if (radio_add_work(wpa_s, bss->freq, "sme-connect", 1,
604 sme_auth_start_cb, cwork) < 0)
605 wpas_connect_work_free(cwork);
606 }
607
608
609 #ifdef CONFIG_SAE
610
611 static int sme_sae_auth(struct wpa_supplicant *wpa_s, u16 auth_transaction,
612 u16 status_code, const u8 *data, size_t len)
613 {
614 int *groups;
615
616 wpa_dbg(wpa_s, MSG_DEBUG, "SME: SAE authentication transaction %u "
617 "status code %u", auth_transaction, status_code);
618
619 if (auth_transaction == 1 &&
620 status_code == WLAN_STATUS_ANTI_CLOGGING_TOKEN_REQ &&
621 wpa_s->sme.sae.state == SAE_COMMITTED &&
622 wpa_s->current_bss && wpa_s->current_ssid) {
623 int default_groups[] = { 19, 20, 21, 25, 26, 0 };
624 u16 group;
625
626 groups = wpa_s->conf->sae_groups;
627 if (!groups || groups[0] <= 0)
628 groups = default_groups;
629
630 if (len < sizeof(le16)) {
631 wpa_dbg(wpa_s, MSG_DEBUG,
632 "SME: Too short SAE anti-clogging token request");
633 return -1;
634 }
635 group = WPA_GET_LE16(data);
636 wpa_dbg(wpa_s, MSG_DEBUG,
637 "SME: SAE anti-clogging token requested (group %u)",
638 group);
639 if (sae_group_allowed(&wpa_s->sme.sae, groups, group) !=
640 WLAN_STATUS_SUCCESS) {
641 wpa_dbg(wpa_s, MSG_ERROR,
642 "SME: SAE group %u of anti-clogging request is invalid",
643 group);
644 return -1;
645 }
646 wpabuf_free(wpa_s->sme.sae_token);
647 wpa_s->sme.sae_token = wpabuf_alloc_copy(data + sizeof(le16),
648 len - sizeof(le16));
649 sme_send_authentication(wpa_s, wpa_s->current_bss,
650 wpa_s->current_ssid, 1);
651 return 0;
652 }
653
654 if (auth_transaction == 1 &&
655 status_code == WLAN_STATUS_FINITE_CYCLIC_GROUP_NOT_SUPPORTED &&
656 wpa_s->sme.sae.state == SAE_COMMITTED &&
657 wpa_s->current_bss && wpa_s->current_ssid) {
658 wpa_dbg(wpa_s, MSG_DEBUG, "SME: SAE group not supported");
659 wpa_s->sme.sae_group_index++;
660 if (sme_set_sae_group(wpa_s) < 0)
661 return -1; /* no other groups enabled */
662 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Try next enabled SAE group");
663 sme_send_authentication(wpa_s, wpa_s->current_bss,
664 wpa_s->current_ssid, 1);
665 return 0;
666 }
667
668 if (status_code != WLAN_STATUS_SUCCESS)
669 return -1;
670
671 if (auth_transaction == 1) {
672 groups = wpa_s->conf->sae_groups;
673
674 wpa_dbg(wpa_s, MSG_DEBUG, "SME SAE commit");
675 if (wpa_s->current_bss == NULL ||
676 wpa_s->current_ssid == NULL)
677 return -1;
678 if (wpa_s->sme.sae.state != SAE_COMMITTED)
679 return -1;
680 if (groups && groups[0] <= 0)
681 groups = NULL;
682 if (sae_parse_commit(&wpa_s->sme.sae, data, len, NULL, NULL,
683 groups) != WLAN_STATUS_SUCCESS)
684 return -1;
685
686 if (sae_process_commit(&wpa_s->sme.sae) < 0) {
687 wpa_printf(MSG_DEBUG, "SAE: Failed to process peer "
688 "commit");
689 return -1;
690 }
691
692 wpabuf_free(wpa_s->sme.sae_token);
693 wpa_s->sme.sae_token = NULL;
694 sme_send_authentication(wpa_s, wpa_s->current_bss,
695 wpa_s->current_ssid, 0);
696 return 0;
697 } else if (auth_transaction == 2) {
698 wpa_dbg(wpa_s, MSG_DEBUG, "SME SAE confirm");
699 if (wpa_s->sme.sae.state != SAE_CONFIRMED)
700 return -1;
701 if (sae_check_confirm(&wpa_s->sme.sae, data, len) < 0)
702 return -1;
703 wpa_s->sme.sae.state = SAE_ACCEPTED;
704 sae_clear_temp_data(&wpa_s->sme.sae);
705 return 1;
706 }
707
708 return -1;
709 }
710 #endif /* CONFIG_SAE */
711
712
713 void sme_event_auth(struct wpa_supplicant *wpa_s, union wpa_event_data *data)
714 {
715 struct wpa_ssid *ssid = wpa_s->current_ssid;
716
717 if (ssid == NULL) {
718 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Ignore authentication event "
719 "when network is not selected");
720 return;
721 }
722
723 if (wpa_s->wpa_state != WPA_AUTHENTICATING) {
724 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Ignore authentication event "
725 "when not in authenticating state");
726 return;
727 }
728
729 if (os_memcmp(wpa_s->pending_bssid, data->auth.peer, ETH_ALEN) != 0) {
730 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Ignore authentication with "
731 "unexpected peer " MACSTR,
732 MAC2STR(data->auth.peer));
733 return;
734 }
735
736 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Authentication response: peer=" MACSTR
737 " auth_type=%d auth_transaction=%d status_code=%d",
738 MAC2STR(data->auth.peer), data->auth.auth_type,
739 data->auth.auth_transaction, data->auth.status_code);
740 wpa_hexdump(MSG_MSGDUMP, "SME: Authentication response IEs",
741 data->auth.ies, data->auth.ies_len);
742
743 eloop_cancel_timeout(sme_auth_timer, wpa_s, NULL);
744
745 #ifdef CONFIG_SAE
746 if (data->auth.auth_type == WLAN_AUTH_SAE) {
747 int res;
748 res = sme_sae_auth(wpa_s, data->auth.auth_transaction,
749 data->auth.status_code, data->auth.ies,
750 data->auth.ies_len);
751 if (res < 0) {
752 wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
753 wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED);
754
755 }
756 if (res != 1)
757 return;
758
759 wpa_printf(MSG_DEBUG, "SME: SAE completed - setting PMK for "
760 "4-way handshake");
761 wpa_sm_set_pmk(wpa_s->wpa, wpa_s->sme.sae.pmk, PMK_LEN,
762 wpa_s->pending_bssid);
763 }
764 #endif /* CONFIG_SAE */
765
766 if (data->auth.status_code != WLAN_STATUS_SUCCESS) {
767 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Authentication failed (status "
768 "code %d)", data->auth.status_code);
769
770 if (data->auth.status_code !=
771 WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG ||
772 wpa_s->sme.auth_alg == data->auth.auth_type ||
773 wpa_s->current_ssid->auth_alg == WPA_AUTH_ALG_LEAP) {
774 wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
775 wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED);
776 return;
777 }
778
779 wpas_connect_work_done(wpa_s);
780
781 switch (data->auth.auth_type) {
782 case WLAN_AUTH_OPEN:
783 wpa_s->current_ssid->auth_alg = WPA_AUTH_ALG_SHARED;
784
785 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Trying SHARED auth");
786 wpa_supplicant_associate(wpa_s, wpa_s->current_bss,
787 wpa_s->current_ssid);
788 return;
789
790 case WLAN_AUTH_SHARED_KEY:
791 wpa_s->current_ssid->auth_alg = WPA_AUTH_ALG_LEAP;
792
793 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Trying LEAP auth");
794 wpa_supplicant_associate(wpa_s, wpa_s->current_bss,
795 wpa_s->current_ssid);
796 return;
797
798 default:
799 return;
800 }
801 }
802
803 #ifdef CONFIG_IEEE80211R
804 if (data->auth.auth_type == WLAN_AUTH_FT) {
805 union wpa_event_data edata;
806 os_memset(&edata, 0, sizeof(edata));
807 edata.ft_ies.ies = data->auth.ies;
808 edata.ft_ies.ies_len = data->auth.ies_len;
809 os_memcpy(edata.ft_ies.target_ap, data->auth.peer, ETH_ALEN);
810 wpa_supplicant_event(wpa_s, EVENT_FT_RESPONSE, &edata);
811 }
812 #endif /* CONFIG_IEEE80211R */
813
814 sme_associate(wpa_s, ssid->mode, data->auth.peer,
815 data->auth.auth_type);
816 }
817
818
819 void sme_associate(struct wpa_supplicant *wpa_s, enum wpas_mode mode,
820 const u8 *bssid, u16 auth_type)
821 {
822 struct wpa_driver_associate_params params;
823 struct ieee802_11_elems elems;
824 #ifdef CONFIG_HT_OVERRIDES
825 struct ieee80211_ht_capabilities htcaps;
826 struct ieee80211_ht_capabilities htcaps_mask;
827 #endif /* CONFIG_HT_OVERRIDES */
828 #ifdef CONFIG_VHT_OVERRIDES
829 struct ieee80211_vht_capabilities vhtcaps;
830 struct ieee80211_vht_capabilities vhtcaps_mask;
831 #endif /* CONFIG_VHT_OVERRIDES */
832
833 os_memset(&params, 0, sizeof(params));
834 params.bssid = bssid;
835 params.ssid = wpa_s->sme.ssid;
836 params.ssid_len = wpa_s->sme.ssid_len;
837 params.freq.freq = wpa_s->sme.freq;
838 params.bg_scan_period = wpa_s->current_ssid ?
839 wpa_s->current_ssid->bg_scan_period : -1;
840 params.wpa_ie = wpa_s->sme.assoc_req_ie_len ?
841 wpa_s->sme.assoc_req_ie : NULL;
842 params.wpa_ie_len = wpa_s->sme.assoc_req_ie_len;
843 params.pairwise_suite = wpa_s->pairwise_cipher;
844 params.group_suite = wpa_s->group_cipher;
845 params.key_mgmt_suite = wpa_s->key_mgmt;
846 params.wpa_proto = wpa_s->wpa_proto;
847 #ifdef CONFIG_HT_OVERRIDES
848 os_memset(&htcaps, 0, sizeof(htcaps));
849 os_memset(&htcaps_mask, 0, sizeof(htcaps_mask));
850 params.htcaps = (u8 *) &htcaps;
851 params.htcaps_mask = (u8 *) &htcaps_mask;
852 wpa_supplicant_apply_ht_overrides(wpa_s, wpa_s->current_ssid, &params);
853 #endif /* CONFIG_HT_OVERRIDES */
854 #ifdef CONFIG_VHT_OVERRIDES
855 os_memset(&vhtcaps, 0, sizeof(vhtcaps));
856 os_memset(&vhtcaps_mask, 0, sizeof(vhtcaps_mask));
857 params.vhtcaps = &vhtcaps;
858 params.vhtcaps_mask = &vhtcaps_mask;
859 wpa_supplicant_apply_vht_overrides(wpa_s, wpa_s->current_ssid, &params);
860 #endif /* CONFIG_VHT_OVERRIDES */
861 #ifdef CONFIG_IEEE80211R
862 if (auth_type == WLAN_AUTH_FT && wpa_s->sme.ft_ies) {
863 params.wpa_ie = wpa_s->sme.ft_ies;
864 params.wpa_ie_len = wpa_s->sme.ft_ies_len;
865 }
866 #endif /* CONFIG_IEEE80211R */
867 params.mode = mode;
868 params.mgmt_frame_protection = wpa_s->sme.mfp;
869 params.rrm_used = wpa_s->rrm.rrm_used;
870 if (wpa_s->sme.prev_bssid_set)
871 params.prev_bssid = wpa_s->sme.prev_bssid;
872
873 wpa_msg(wpa_s, MSG_INFO, "Trying to associate with " MACSTR
874 " (SSID='%s' freq=%d MHz)", MAC2STR(params.bssid),
875 params.ssid ? wpa_ssid_txt(params.ssid, params.ssid_len) : "",
876 params.freq.freq);
877
878 wpa_supplicant_set_state(wpa_s, WPA_ASSOCIATING);
879
880 if (params.wpa_ie == NULL ||
881 ieee802_11_parse_elems(params.wpa_ie, params.wpa_ie_len, &elems, 0)
882 < 0) {
883 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Could not parse own IEs?!");
884 os_memset(&elems, 0, sizeof(elems));
885 }
886 if (elems.rsn_ie) {
887 params.wpa_proto = WPA_PROTO_RSN;
888 wpa_sm_set_assoc_wpa_ie(wpa_s->wpa, elems.rsn_ie - 2,
889 elems.rsn_ie_len + 2);
890 } else if (elems.wpa_ie) {
891 params.wpa_proto = WPA_PROTO_WPA;
892 wpa_sm_set_assoc_wpa_ie(wpa_s->wpa, elems.wpa_ie - 2,
893 elems.wpa_ie_len + 2);
894 } else if (elems.osen) {
895 params.wpa_proto = WPA_PROTO_OSEN;
896 wpa_sm_set_assoc_wpa_ie(wpa_s->wpa, elems.osen - 2,
897 elems.osen_len + 2);
898 } else
899 wpa_sm_set_assoc_wpa_ie(wpa_s->wpa, NULL, 0);
900 if (wpa_s->current_ssid && wpa_s->current_ssid->p2p_group)
901 params.p2p = 1;
902
903 if (wpa_s->parent->set_sta_uapsd)
904 params.uapsd = wpa_s->parent->sta_uapsd;
905 else
906 params.uapsd = -1;
907
908 if (wpa_drv_associate(wpa_s, &params) < 0) {
909 wpa_msg(wpa_s, MSG_INFO, "SME: Association request to the "
910 "driver failed");
911 wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
912 wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED);
913 os_memset(wpa_s->pending_bssid, 0, ETH_ALEN);
914 return;
915 }
916
917 eloop_register_timeout(SME_ASSOC_TIMEOUT, 0, sme_assoc_timer, wpa_s,
918 NULL);
919 }
920
921
922 int sme_update_ft_ies(struct wpa_supplicant *wpa_s, const u8 *md,
923 const u8 *ies, size_t ies_len)
924 {
925 if (md == NULL || ies == NULL) {
926 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Remove mobility domain");
927 os_free(wpa_s->sme.ft_ies);
928 wpa_s->sme.ft_ies = NULL;
929 wpa_s->sme.ft_ies_len = 0;
930 wpa_s->sme.ft_used = 0;
931 return 0;
932 }
933
934 os_memcpy(wpa_s->sme.mobility_domain, md, MOBILITY_DOMAIN_ID_LEN);
935 wpa_hexdump(MSG_DEBUG, "SME: FT IEs", ies, ies_len);
936 os_free(wpa_s->sme.ft_ies);
937 wpa_s->sme.ft_ies = os_malloc(ies_len);
938 if (wpa_s->sme.ft_ies == NULL)
939 return -1;
940 os_memcpy(wpa_s->sme.ft_ies, ies, ies_len);
941 wpa_s->sme.ft_ies_len = ies_len;
942 return 0;
943 }
944
945
946 static void sme_deauth(struct wpa_supplicant *wpa_s)
947 {
948 int bssid_changed;
949
950 bssid_changed = !is_zero_ether_addr(wpa_s->bssid);
951
952 if (wpa_drv_deauthenticate(wpa_s, wpa_s->pending_bssid,
953 WLAN_REASON_DEAUTH_LEAVING) < 0) {
954 wpa_msg(wpa_s, MSG_INFO, "SME: Deauth request to the driver "
955 "failed");
956 }
957 wpa_s->sme.prev_bssid_set = 0;
958
959 wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
960 wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED);
961 os_memset(wpa_s->bssid, 0, ETH_ALEN);
962 os_memset(wpa_s->pending_bssid, 0, ETH_ALEN);
963 if (bssid_changed)
964 wpas_notify_bssid_changed(wpa_s);
965 }
966
967
968 void sme_event_assoc_reject(struct wpa_supplicant *wpa_s,
969 union wpa_event_data *data)
970 {
971 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Association with " MACSTR " failed: "
972 "status code %d", MAC2STR(wpa_s->pending_bssid),
973 data->assoc_reject.status_code);
974
975 eloop_cancel_timeout(sme_assoc_timer, wpa_s, NULL);
976
977 #ifdef CONFIG_SAE
978 if (wpa_s->sme.sae_pmksa_caching && wpa_s->current_ssid &&
979 wpa_key_mgmt_sae(wpa_s->current_ssid->key_mgmt)) {
980 wpa_dbg(wpa_s, MSG_DEBUG,
981 "PMKSA caching attempt rejected - drop PMKSA cache entry and fall back to SAE authentication");
982 wpa_sm_aborted_cached(wpa_s->wpa);
983 wpa_sm_pmksa_cache_flush(wpa_s->wpa, wpa_s->current_ssid);
984 if (wpa_s->current_bss) {
985 struct wpa_bss *bss = wpa_s->current_bss;
986 struct wpa_ssid *ssid = wpa_s->current_ssid;
987
988 wpa_drv_deauthenticate(wpa_s, wpa_s->pending_bssid,
989 WLAN_REASON_DEAUTH_LEAVING);
990 wpas_connect_work_done(wpa_s);
991 wpa_supplicant_mark_disassoc(wpa_s);
992 wpa_supplicant_connect(wpa_s, bss, ssid);
993 return;
994 }
995 }
996 #endif /* CONFIG_SAE */
997
998 /*
999 * For now, unconditionally terminate the previous authentication. In
1000 * theory, this should not be needed, but mac80211 gets quite confused
1001 * if the authentication is left pending.. Some roaming cases might
1002 * benefit from using the previous authentication, so this could be
1003 * optimized in the future.
1004 */
1005 sme_deauth(wpa_s);
1006 }
1007
1008
1009 void sme_event_auth_timed_out(struct wpa_supplicant *wpa_s,
1010 union wpa_event_data *data)
1011 {
1012 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Authentication timed out");
1013 wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
1014 wpa_supplicant_mark_disassoc(wpa_s);
1015 }
1016
1017
1018 void sme_event_assoc_timed_out(struct wpa_supplicant *wpa_s,
1019 union wpa_event_data *data)
1020 {
1021 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Association timed out");
1022 wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
1023 wpa_supplicant_mark_disassoc(wpa_s);
1024 }
1025
1026
1027 void sme_event_disassoc(struct wpa_supplicant *wpa_s,
1028 struct disassoc_info *info)
1029 {
1030 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Disassociation event received");
1031 if (wpa_s->sme.prev_bssid_set) {
1032 /*
1033 * cfg80211/mac80211 can get into somewhat confused state if
1034 * the AP only disassociates us and leaves us in authenticated
1035 * state. For now, force the state to be cleared to avoid
1036 * confusing errors if we try to associate with the AP again.
1037 */
1038 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Deauthenticate to clear "
1039 "driver state");
1040 wpa_drv_deauthenticate(wpa_s, wpa_s->sme.prev_bssid,
1041 WLAN_REASON_DEAUTH_LEAVING);
1042 }
1043 }
1044
1045
1046 static void sme_auth_timer(void *eloop_ctx, void *timeout_ctx)
1047 {
1048 struct wpa_supplicant *wpa_s = eloop_ctx;
1049 if (wpa_s->wpa_state == WPA_AUTHENTICATING) {
1050 wpa_msg(wpa_s, MSG_DEBUG, "SME: Authentication timeout");
1051 sme_deauth(wpa_s);
1052 }
1053 }
1054
1055
1056 static void sme_assoc_timer(void *eloop_ctx, void *timeout_ctx)
1057 {
1058 struct wpa_supplicant *wpa_s = eloop_ctx;
1059 if (wpa_s->wpa_state == WPA_ASSOCIATING) {
1060 wpa_msg(wpa_s, MSG_DEBUG, "SME: Association timeout");
1061 sme_deauth(wpa_s);
1062 }
1063 }
1064
1065
1066 void sme_state_changed(struct wpa_supplicant *wpa_s)
1067 {
1068 /* Make sure timers are cleaned up appropriately. */
1069 if (wpa_s->wpa_state != WPA_ASSOCIATING)
1070 eloop_cancel_timeout(sme_assoc_timer, wpa_s, NULL);
1071 if (wpa_s->wpa_state != WPA_AUTHENTICATING)
1072 eloop_cancel_timeout(sme_auth_timer, wpa_s, NULL);
1073 }
1074
1075
1076 void sme_disassoc_while_authenticating(struct wpa_supplicant *wpa_s,
1077 const u8 *prev_pending_bssid)
1078 {
1079 /*
1080 * mac80211-workaround to force deauth on failed auth cmd,
1081 * requires us to remain in authenticating state to allow the
1082 * second authentication attempt to be continued properly.
1083 */
1084 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Allow pending authentication "
1085 "to proceed after disconnection event");
1086 wpa_supplicant_set_state(wpa_s, WPA_AUTHENTICATING);
1087 os_memcpy(wpa_s->pending_bssid, prev_pending_bssid, ETH_ALEN);
1088
1089 /*
1090 * Re-arm authentication timer in case auth fails for whatever reason.
1091 */
1092 eloop_cancel_timeout(sme_auth_timer, wpa_s, NULL);
1093 eloop_register_timeout(SME_AUTH_TIMEOUT, 0, sme_auth_timer, wpa_s,
1094 NULL);
1095 }
1096
1097
1098 void sme_deinit(struct wpa_supplicant *wpa_s)
1099 {
1100 os_free(wpa_s->sme.ft_ies);
1101 wpa_s->sme.ft_ies = NULL;
1102 wpa_s->sme.ft_ies_len = 0;
1103 #ifdef CONFIG_IEEE80211W
1104 sme_stop_sa_query(wpa_s);
1105 #endif /* CONFIG_IEEE80211W */
1106 #ifdef CONFIG_SAE
1107 wpabuf_free(wpa_s->sme.sae_token);
1108 wpa_s->sme.sae_token = NULL;
1109 sae_clear_data(&wpa_s->sme.sae);
1110 #endif /* CONFIG_SAE */
1111
1112 eloop_cancel_timeout(sme_assoc_timer, wpa_s, NULL);
1113 eloop_cancel_timeout(sme_auth_timer, wpa_s, NULL);
1114 eloop_cancel_timeout(sme_obss_scan_timeout, wpa_s, NULL);
1115 }
1116
1117
1118 static void sme_send_2040_bss_coex(struct wpa_supplicant *wpa_s,
1119 const u8 *chan_list, u8 num_channels,
1120 u8 num_intol)
1121 {
1122 struct ieee80211_2040_bss_coex_ie *bc_ie;
1123 struct ieee80211_2040_intol_chan_report *ic_report;
1124 struct wpabuf *buf;
1125
1126 wpa_printf(MSG_DEBUG, "SME: Send 20/40 BSS Coexistence to " MACSTR
1127 " (num_channels=%u num_intol=%u)",
1128 MAC2STR(wpa_s->bssid), num_channels, num_intol);
1129 wpa_hexdump(MSG_DEBUG, "SME: 20/40 BSS Intolerant Channels",
1130 chan_list, num_channels);
1131
1132 buf = wpabuf_alloc(2 + /* action.category + action_code */
1133 sizeof(struct ieee80211_2040_bss_coex_ie) +
1134 sizeof(struct ieee80211_2040_intol_chan_report) +
1135 num_channels);
1136 if (buf == NULL)
1137 return;
1138
1139 wpabuf_put_u8(buf, WLAN_ACTION_PUBLIC);
1140 wpabuf_put_u8(buf, WLAN_PA_20_40_BSS_COEX);
1141
1142 bc_ie = wpabuf_put(buf, sizeof(*bc_ie));
1143 bc_ie->element_id = WLAN_EID_20_40_BSS_COEXISTENCE;
1144 bc_ie->length = 1;
1145 if (num_intol)
1146 bc_ie->coex_param |= WLAN_20_40_BSS_COEX_20MHZ_WIDTH_REQ;
1147
1148 if (num_channels > 0) {
1149 ic_report = wpabuf_put(buf, sizeof(*ic_report));
1150 ic_report->element_id = WLAN_EID_20_40_BSS_INTOLERANT;
1151 ic_report->length = num_channels + 1;
1152 ic_report->op_class = 0;
1153 os_memcpy(wpabuf_put(buf, num_channels), chan_list,
1154 num_channels);
1155 }
1156
1157 if (wpa_drv_send_action(wpa_s, wpa_s->assoc_freq, 0, wpa_s->bssid,
1158 wpa_s->own_addr, wpa_s->bssid,
1159 wpabuf_head(buf), wpabuf_len(buf), 0) < 0) {
1160 wpa_msg(wpa_s, MSG_INFO,
1161 "SME: Failed to send 20/40 BSS Coexistence frame");
1162 }
1163
1164 wpabuf_free(buf);
1165 }
1166
1167
1168 int sme_proc_obss_scan(struct wpa_supplicant *wpa_s)
1169 {
1170 struct wpa_bss *bss;
1171 const u8 *ie;
1172 u16 ht_cap;
1173 u8 chan_list[P2P_MAX_CHANNELS], channel;
1174 u8 num_channels = 0, num_intol = 0, i;
1175
1176 if (!wpa_s->sme.sched_obss_scan)
1177 return 0;
1178
1179 wpa_s->sme.sched_obss_scan = 0;
1180 if (!wpa_s->current_bss || wpa_s->wpa_state != WPA_COMPLETED)
1181 return 1;
1182
1183 /*
1184 * Check whether AP uses regulatory triplet or channel triplet in
1185 * country info. Right now the operating class of the BSS channel
1186 * width trigger event is "unknown" (IEEE Std 802.11-2012 10.15.12),
1187 * based on the assumption that operating class triplet is not used in
1188 * beacon frame. If the First Channel Number/Operating Extension
1189 * Identifier octet has a positive integer value of 201 or greater,
1190 * then its operating class triplet.
1191 *
1192 * TODO: If Supported Operating Classes element is present in beacon
1193 * frame, have to lookup operating class in Annex E and fill them in
1194 * 2040 coex frame.
1195 */
1196 ie = wpa_bss_get_ie(wpa_s->current_bss, WLAN_EID_COUNTRY);
1197 if (ie && (ie[1] >= 6) && (ie[5] >= 201))
1198 return 1;
1199
1200 os_memset(chan_list, 0, sizeof(chan_list));
1201
1202 dl_list_for_each(bss, &wpa_s->bss, struct wpa_bss, list) {
1203 /* Skip other band bss */
1204 enum hostapd_hw_mode mode;
1205 mode = ieee80211_freq_to_chan(bss->freq, &channel);
1206 if (mode != HOSTAPD_MODE_IEEE80211G &&
1207 mode != HOSTAPD_MODE_IEEE80211B)
1208 continue;
1209
1210 ie = wpa_bss_get_ie(bss, WLAN_EID_HT_CAP);
1211 ht_cap = (ie && (ie[1] == 26)) ? WPA_GET_LE16(ie + 2) : 0;
1212 wpa_printf(MSG_DEBUG, "SME OBSS scan BSS " MACSTR
1213 " freq=%u chan=%u ht_cap=0x%x",
1214 MAC2STR(bss->bssid), bss->freq, channel, ht_cap);
1215
1216 if (!ht_cap || (ht_cap & HT_CAP_INFO_40MHZ_INTOLERANT)) {
1217 if (ht_cap & HT_CAP_INFO_40MHZ_INTOLERANT)
1218 num_intol++;
1219
1220 /* Check whether the channel is already considered */
1221 for (i = 0; i < num_channels; i++) {
1222 if (channel == chan_list[i])
1223 break;
1224 }
1225 if (i != num_channels)
1226 continue;
1227
1228 chan_list[num_channels++] = channel;
1229 }
1230 }
1231
1232 sme_send_2040_bss_coex(wpa_s, chan_list, num_channels, num_intol);
1233 return 1;
1234 }
1235
1236
1237 static struct hostapd_hw_modes * get_mode(struct hostapd_hw_modes *modes,
1238 u16 num_modes,
1239 enum hostapd_hw_mode mode)
1240 {
1241 u16 i;
1242
1243 for (i = 0; i < num_modes; i++) {
1244 if (modes[i].mode == mode)
1245 return &modes[i];
1246 }
1247
1248 return NULL;
1249 }
1250
1251
1252 static void wpa_setband_scan_freqs_list(struct wpa_supplicant *wpa_s,
1253 enum hostapd_hw_mode band,
1254 struct wpa_driver_scan_params *params)
1255 {
1256 /* Include only supported channels for the specified band */
1257 struct hostapd_hw_modes *mode;
1258 int count, i;
1259
1260 mode = get_mode(wpa_s->hw.modes, wpa_s->hw.num_modes, band);
1261 if (mode == NULL) {
1262 /* No channels supported in this band - use empty list */
1263 params->freqs = os_zalloc(sizeof(int));
1264 return;
1265 }
1266
1267 params->freqs = os_calloc(mode->num_channels + 1, sizeof(int));
1268 if (params->freqs == NULL)
1269 return;
1270 for (count = 0, i = 0; i < mode->num_channels; i++) {
1271 if (mode->channels[i].flag & HOSTAPD_CHAN_DISABLED)
1272 continue;
1273 params->freqs[count++] = mode->channels[i].freq;
1274 }
1275 }
1276
1277
1278 static void sme_obss_scan_timeout(void *eloop_ctx, void *timeout_ctx)
1279 {
1280 struct wpa_supplicant *wpa_s = eloop_ctx;
1281 struct wpa_driver_scan_params params;
1282
1283 if (!wpa_s->current_bss) {
1284 wpa_printf(MSG_DEBUG, "SME OBSS: Ignore scan request");
1285 return;
1286 }
1287
1288 os_memset(&params, 0, sizeof(params));
1289 wpa_setband_scan_freqs_list(wpa_s, HOSTAPD_MODE_IEEE80211G, &params);
1290 params.low_priority = 1;
1291 wpa_printf(MSG_DEBUG, "SME OBSS: Request an OBSS scan");
1292
1293 if (wpa_supplicant_trigger_scan(wpa_s, &params))
1294 wpa_printf(MSG_DEBUG, "SME OBSS: Failed to trigger scan");
1295 else
1296 wpa_s->sme.sched_obss_scan = 1;
1297 os_free(params.freqs);
1298
1299 eloop_register_timeout(wpa_s->sme.obss_scan_int, 0,
1300 sme_obss_scan_timeout, wpa_s, NULL);
1301 }
1302
1303
1304 void sme_sched_obss_scan(struct wpa_supplicant *wpa_s, int enable)
1305 {
1306 const u8 *ie;
1307 struct wpa_bss *bss = wpa_s->current_bss;
1308 struct wpa_ssid *ssid = wpa_s->current_ssid;
1309 struct hostapd_hw_modes *hw_mode = NULL;
1310 int i;
1311
1312 eloop_cancel_timeout(sme_obss_scan_timeout, wpa_s, NULL);
1313 wpa_s->sme.sched_obss_scan = 0;
1314 if (!enable)
1315 return;
1316
1317 /*
1318 * Schedule OBSS scan if driver is using station SME in wpa_supplicant
1319 * or it expects OBSS scan to be performed by wpa_supplicant.
1320 */
1321 if (!((wpa_s->drv_flags & WPA_DRIVER_FLAGS_SME) ||
1322 (wpa_s->drv_flags & WPA_DRIVER_FLAGS_OBSS_SCAN)) ||
1323 ssid == NULL || ssid->mode != IEEE80211_MODE_INFRA)
1324 return;
1325
1326 if (!wpa_s->hw.modes)
1327 return;
1328
1329 /* only HT caps in 11g mode are relevant */
1330 for (i = 0; i < wpa_s->hw.num_modes; i++) {
1331 hw_mode = &wpa_s->hw.modes[i];
1332 if (hw_mode->mode == HOSTAPD_MODE_IEEE80211G)
1333 break;
1334 }
1335
1336 /* Driver does not support HT40 for 11g or doesn't have 11g. */
1337 if (i == wpa_s->hw.num_modes || !hw_mode ||
1338 !(hw_mode->ht_capab & HT_CAP_INFO_SUPP_CHANNEL_WIDTH_SET))
1339 return;
1340
1341 if (bss == NULL || bss->freq < 2400 || bss->freq > 2500)
1342 return; /* Not associated on 2.4 GHz band */
1343
1344 /* Check whether AP supports HT40 */
1345 ie = wpa_bss_get_ie(wpa_s->current_bss, WLAN_EID_HT_CAP);
1346 if (!ie || ie[1] < 2 ||
1347 !(WPA_GET_LE16(ie + 2) & HT_CAP_INFO_SUPP_CHANNEL_WIDTH_SET))
1348 return; /* AP does not support HT40 */
1349
1350 ie = wpa_bss_get_ie(wpa_s->current_bss,
1351 WLAN_EID_OVERLAPPING_BSS_SCAN_PARAMS);
1352 if (!ie || ie[1] < 14)
1353 return; /* AP does not request OBSS scans */
1354
1355 wpa_s->sme.obss_scan_int = WPA_GET_LE16(ie + 6);
1356 if (wpa_s->sme.obss_scan_int < 10) {
1357 wpa_printf(MSG_DEBUG, "SME: Invalid OBSS Scan Interval %u "
1358 "replaced with the minimum 10 sec",
1359 wpa_s->sme.obss_scan_int);
1360 wpa_s->sme.obss_scan_int = 10;
1361 }
1362 wpa_printf(MSG_DEBUG, "SME: OBSS Scan Interval %u sec",
1363 wpa_s->sme.obss_scan_int);
1364 eloop_register_timeout(wpa_s->sme.obss_scan_int, 0,
1365 sme_obss_scan_timeout, wpa_s, NULL);
1366 }
1367
1368
1369 #ifdef CONFIG_IEEE80211W
1370
1371 static const unsigned int sa_query_max_timeout = 1000;
1372 static const unsigned int sa_query_retry_timeout = 201;
1373
1374 static int sme_check_sa_query_timeout(struct wpa_supplicant *wpa_s)
1375 {
1376 u32 tu;
1377 struct os_reltime now, passed;
1378 os_get_reltime(&now);
1379 os_reltime_sub(&now, &wpa_s->sme.sa_query_start, &passed);
1380 tu = (passed.sec * 1000000 + passed.usec) / 1024;
1381 if (sa_query_max_timeout < tu) {
1382 wpa_dbg(wpa_s, MSG_DEBUG, "SME: SA Query timed out");
1383 sme_stop_sa_query(wpa_s);
1384 wpa_supplicant_deauthenticate(
1385 wpa_s, WLAN_REASON_PREV_AUTH_NOT_VALID);
1386 return 1;
1387 }
1388
1389 return 0;
1390 }
1391
1392
1393 static void sme_send_sa_query_req(struct wpa_supplicant *wpa_s,
1394 const u8 *trans_id)
1395 {
1396 u8 req[2 + WLAN_SA_QUERY_TR_ID_LEN];
1397 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Sending SA Query Request to "
1398 MACSTR, MAC2STR(wpa_s->bssid));
1399 wpa_hexdump(MSG_DEBUG, "SME: SA Query Transaction ID",
1400 trans_id, WLAN_SA_QUERY_TR_ID_LEN);
1401 req[0] = WLAN_ACTION_SA_QUERY;
1402 req[1] = WLAN_SA_QUERY_REQUEST;
1403 os_memcpy(req + 2, trans_id, WLAN_SA_QUERY_TR_ID_LEN);
1404 if (wpa_drv_send_action(wpa_s, wpa_s->assoc_freq, 0, wpa_s->bssid,
1405 wpa_s->own_addr, wpa_s->bssid,
1406 req, sizeof(req), 0) < 0)
1407 wpa_msg(wpa_s, MSG_INFO, "SME: Failed to send SA Query "
1408 "Request");
1409 }
1410
1411
1412 static void sme_sa_query_timer(void *eloop_ctx, void *timeout_ctx)
1413 {
1414 struct wpa_supplicant *wpa_s = eloop_ctx;
1415 unsigned int timeout, sec, usec;
1416 u8 *trans_id, *nbuf;
1417
1418 if (wpa_s->sme.sa_query_count > 0 &&
1419 sme_check_sa_query_timeout(wpa_s))
1420 return;
1421
1422 nbuf = os_realloc_array(wpa_s->sme.sa_query_trans_id,
1423 wpa_s->sme.sa_query_count + 1,
1424 WLAN_SA_QUERY_TR_ID_LEN);
1425 if (nbuf == NULL)
1426 return;
1427 if (wpa_s->sme.sa_query_count == 0) {
1428 /* Starting a new SA Query procedure */
1429 os_get_reltime(&wpa_s->sme.sa_query_start);
1430 }
1431 trans_id = nbuf + wpa_s->sme.sa_query_count * WLAN_SA_QUERY_TR_ID_LEN;
1432 wpa_s->sme.sa_query_trans_id = nbuf;
1433 wpa_s->sme.sa_query_count++;
1434
1435 if (os_get_random(trans_id, WLAN_SA_QUERY_TR_ID_LEN) < 0) {
1436 wpa_printf(MSG_DEBUG, "Could not generate SA Query ID");
1437 return;
1438 }
1439
1440 timeout = sa_query_retry_timeout;
1441 sec = ((timeout / 1000) * 1024) / 1000;
1442 usec = (timeout % 1000) * 1024;
1443 eloop_register_timeout(sec, usec, sme_sa_query_timer, wpa_s, NULL);
1444
1445 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Association SA Query attempt %d",
1446 wpa_s->sme.sa_query_count);
1447
1448 sme_send_sa_query_req(wpa_s, trans_id);
1449 }
1450
1451
1452 static void sme_start_sa_query(struct wpa_supplicant *wpa_s)
1453 {
1454 sme_sa_query_timer(wpa_s, NULL);
1455 }
1456
1457
1458 static void sme_stop_sa_query(struct wpa_supplicant *wpa_s)
1459 {
1460 eloop_cancel_timeout(sme_sa_query_timer, wpa_s, NULL);
1461 os_free(wpa_s->sme.sa_query_trans_id);
1462 wpa_s->sme.sa_query_trans_id = NULL;
1463 wpa_s->sme.sa_query_count = 0;
1464 }
1465
1466
1467 void sme_event_unprot_disconnect(struct wpa_supplicant *wpa_s, const u8 *sa,
1468 const u8 *da, u16 reason_code)
1469 {
1470 struct wpa_ssid *ssid;
1471 struct os_reltime now;
1472
1473 if (wpa_s->wpa_state != WPA_COMPLETED)
1474 return;
1475 ssid = wpa_s->current_ssid;
1476 if (ssid == NULL ||
1477 (ssid->ieee80211w == MGMT_FRAME_PROTECTION_DEFAULT ?
1478 wpa_s->conf->pmf : ssid->ieee80211w) == NO_MGMT_FRAME_PROTECTION)
1479 return;
1480 if (os_memcmp(sa, wpa_s->bssid, ETH_ALEN) != 0)
1481 return;
1482 if (reason_code != WLAN_REASON_CLASS2_FRAME_FROM_NONAUTH_STA &&
1483 reason_code != WLAN_REASON_CLASS3_FRAME_FROM_NONASSOC_STA)
1484 return;
1485 if (wpa_s->sme.sa_query_count > 0)
1486 return;
1487
1488 os_get_reltime(&now);
1489 if (wpa_s->sme.last_unprot_disconnect.sec &&
1490 !os_reltime_expired(&now, &wpa_s->sme.last_unprot_disconnect, 10))
1491 return; /* limit SA Query procedure frequency */
1492 wpa_s->sme.last_unprot_disconnect = now;
1493
1494 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Unprotected disconnect dropped - "
1495 "possible AP/STA state mismatch - trigger SA Query");
1496 sme_start_sa_query(wpa_s);
1497 }
1498
1499
1500 void sme_sa_query_rx(struct wpa_supplicant *wpa_s, const u8 *sa,
1501 const u8 *data, size_t len)
1502 {
1503 int i;
1504
1505 if (wpa_s->sme.sa_query_trans_id == NULL ||
1506 len < 1 + WLAN_SA_QUERY_TR_ID_LEN ||
1507 data[0] != WLAN_SA_QUERY_RESPONSE)
1508 return;
1509 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Received SA Query response from "
1510 MACSTR " (trans_id %02x%02x)", MAC2STR(sa), data[1], data[2]);
1511
1512 if (os_memcmp(sa, wpa_s->bssid, ETH_ALEN) != 0)
1513 return;
1514
1515 for (i = 0; i < wpa_s->sme.sa_query_count; i++) {
1516 if (os_memcmp(wpa_s->sme.sa_query_trans_id +
1517 i * WLAN_SA_QUERY_TR_ID_LEN,
1518 data + 1, WLAN_SA_QUERY_TR_ID_LEN) == 0)
1519 break;
1520 }
1521
1522 if (i >= wpa_s->sme.sa_query_count) {
1523 wpa_dbg(wpa_s, MSG_DEBUG, "SME: No matching SA Query "
1524 "transaction identifier found");
1525 return;
1526 }
1527
1528 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Reply to pending SA Query received "
1529 "from " MACSTR, MAC2STR(sa));
1530 sme_stop_sa_query(wpa_s);
1531 }
1532
1533 #endif /* CONFIG_IEEE80211W */
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