1 /*
2 * wpa_supplicant - SME
3 * Copyright (c) 2009-2014, Jouni Malinen <j@w1.fi>
4 *
5 * This software may be distributed under the terms of the BSD license.
6 * See README for more details.
7 */
8
9 #include "includes.h"
10
11 #include "common.h"
12 #include "utils/eloop.h"
13 #include "common/ieee802_11_defs.h"
14 #include "common/ieee802_11_common.h"
15 #include "eapol_supp/eapol_supp_sm.h"
16 #include "common/wpa_common.h"
17 #include "common/sae.h"
18 #include "rsn_supp/wpa.h"
19 #include "rsn_supp/pmksa_cache.h"
20 #include "config.h"
21 #include "wpa_supplicant_i.h"
22 #include "driver_i.h"
23 #include "wpas_glue.h"
24 #include "wps_supplicant.h"
25 #include "p2p_supplicant.h"
26 #include "notify.h"
27 #include "bss.h"
28 #include "scan.h"
29 #include "sme.h"
30 #include "hs20_supplicant.h"
31
32 #define SME_AUTH_TIMEOUT 5
33 #define SME_ASSOC_TIMEOUT 5
34
35 static void sme_auth_timer(void *eloop_ctx, void *timeout_ctx);
36 static void sme_assoc_timer(void *eloop_ctx, void *timeout_ctx);
37 static void sme_obss_scan_timeout(void *eloop_ctx, void *timeout_ctx);
38 #ifdef CONFIG_IEEE80211W
39 static void sme_stop_sa_query(struct wpa_supplicant *wpa_s);
40 #endif /* CONFIG_IEEE80211W */
41
42
43 #ifdef CONFIG_SAE
44
index_within_array(const int * array,int idx)45 static int index_within_array(const int *array, int idx)
46 {
47 int i;
48 for (i = 0; i < idx; i++) {
49 if (array[i] <= 0)
50 return 0;
51 }
52 return 1;
53 }
54
55
sme_set_sae_group(struct wpa_supplicant * wpa_s)56 static int sme_set_sae_group(struct wpa_supplicant *wpa_s)
57 {
58 int *groups = wpa_s->conf->sae_groups;
59 int default_groups[] = { 19, 20, 21, 25, 26, 0 };
60
61 if (!groups || groups[0] <= 0)
62 groups = default_groups;
63
64 /* Configuration may have changed, so validate current index */
65 if (!index_within_array(groups, wpa_s->sme.sae_group_index))
66 return -1;
67
68 for (;;) {
69 int group = groups[wpa_s->sme.sae_group_index];
70 if (group <= 0)
71 break;
72 if (sae_set_group(&wpa_s->sme.sae, group) == 0) {
73 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Selected SAE group %d",
74 wpa_s->sme.sae.group);
75 return 0;
76 }
77 wpa_s->sme.sae_group_index++;
78 }
79
80 return -1;
81 }
82
83
sme_auth_build_sae_commit(struct wpa_supplicant * wpa_s,struct wpa_ssid * ssid,const u8 * bssid)84 static struct wpabuf * sme_auth_build_sae_commit(struct wpa_supplicant *wpa_s,
85 struct wpa_ssid *ssid,
86 const u8 *bssid)
87 {
88 struct wpabuf *buf;
89 size_t len;
90
91 if (ssid->passphrase == NULL) {
92 wpa_printf(MSG_DEBUG, "SAE: No password available");
93 return NULL;
94 }
95
96 if (sme_set_sae_group(wpa_s) < 0) {
97 wpa_printf(MSG_DEBUG, "SAE: Failed to select group");
98 return NULL;
99 }
100
101 if (sae_prepare_commit(wpa_s->own_addr, bssid,
102 (u8 *) ssid->passphrase,
103 os_strlen(ssid->passphrase),
104 &wpa_s->sme.sae) < 0) {
105 wpa_printf(MSG_DEBUG, "SAE: Could not pick PWE");
106 return NULL;
107 }
108
109 len = wpa_s->sme.sae_token ? wpabuf_len(wpa_s->sme.sae_token) : 0;
110 buf = wpabuf_alloc(4 + SAE_COMMIT_MAX_LEN + len);
111 if (buf == NULL)
112 return NULL;
113
114 wpabuf_put_le16(buf, 1); /* Transaction seq# */
115 wpabuf_put_le16(buf, WLAN_STATUS_SUCCESS);
116 sae_write_commit(&wpa_s->sme.sae, buf, wpa_s->sme.sae_token);
117
118 return buf;
119 }
120
121
sme_auth_build_sae_confirm(struct wpa_supplicant * wpa_s)122 static struct wpabuf * sme_auth_build_sae_confirm(struct wpa_supplicant *wpa_s)
123 {
124 struct wpabuf *buf;
125
126 buf = wpabuf_alloc(4 + SAE_CONFIRM_MAX_LEN);
127 if (buf == NULL)
128 return NULL;
129
130 wpabuf_put_le16(buf, 2); /* Transaction seq# */
131 wpabuf_put_le16(buf, WLAN_STATUS_SUCCESS);
132 sae_write_confirm(&wpa_s->sme.sae, buf);
133
134 return buf;
135 }
136
137 #endif /* CONFIG_SAE */
138
139
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 */
sme_auth_handle_rrm(struct wpa_supplicant * wpa_s,struct wpa_bss * bss)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
sme_send_authentication(struct wpa_supplicant * wpa_s,struct wpa_bss * bss,struct wpa_ssid * ssid,int start)194 static void sme_send_authentication(struct wpa_supplicant *wpa_s,
195 struct wpa_bss *bss, struct wpa_ssid *ssid,
196 int start)
197 {
198 struct wpa_driver_auth_params params;
199 struct wpa_ssid *old_ssid;
200 #ifdef CONFIG_IEEE80211R
201 const u8 *ie;
202 #endif /* CONFIG_IEEE80211R */
203 #ifdef CONFIG_IEEE80211R
204 const u8 *md = NULL;
205 #endif /* CONFIG_IEEE80211R */
206 int i, bssid_changed;
207 struct wpabuf *resp = NULL;
208 u8 ext_capab[18];
209 int ext_capab_len;
210 int skip_auth;
211 #ifdef CONFIG_MBO
212 const u8 *mbo;
213 #endif /* CONFIG_MBO */
214
215 if (bss == NULL) {
216 wpa_msg(wpa_s, MSG_ERROR, "SME: No scan result available for "
217 "the network");
218 wpas_connect_work_done(wpa_s);
219 return;
220 }
221
222 skip_auth = wpa_s->conf->reassoc_same_bss_optim &&
223 wpa_s->reassoc_same_bss;
224 wpa_s->current_bss = bss;
225
226 os_memset(¶ms, 0, sizeof(params));
227 wpa_s->reassociate = 0;
228
229 params.freq = bss->freq;
230 params.bssid = bss->bssid;
231 params.ssid = bss->ssid;
232 params.ssid_len = bss->ssid_len;
233 params.p2p = ssid->p2p_group;
234
235 if (wpa_s->sme.ssid_len != params.ssid_len ||
236 os_memcmp(wpa_s->sme.ssid, params.ssid, params.ssid_len) != 0)
237 wpa_s->sme.prev_bssid_set = 0;
238
239 wpa_s->sme.freq = params.freq;
240 os_memcpy(wpa_s->sme.ssid, params.ssid, params.ssid_len);
241 wpa_s->sme.ssid_len = params.ssid_len;
242
243 params.auth_alg = WPA_AUTH_ALG_OPEN;
244 #ifdef IEEE8021X_EAPOL
245 if (ssid->key_mgmt & WPA_KEY_MGMT_IEEE8021X_NO_WPA) {
246 if (ssid->leap) {
247 if (ssid->non_leap == 0)
248 params.auth_alg = WPA_AUTH_ALG_LEAP;
249 else
250 params.auth_alg |= WPA_AUTH_ALG_LEAP;
251 }
252 }
253 #endif /* IEEE8021X_EAPOL */
254 wpa_dbg(wpa_s, MSG_DEBUG, "Automatic auth_alg selection: 0x%x",
255 params.auth_alg);
256 if (ssid->auth_alg) {
257 params.auth_alg = ssid->auth_alg;
258 wpa_dbg(wpa_s, MSG_DEBUG, "Overriding auth_alg selection: "
259 "0x%x", params.auth_alg);
260 }
261 #ifdef CONFIG_SAE
262 wpa_s->sme.sae_pmksa_caching = 0;
263 if (wpa_key_mgmt_sae(ssid->key_mgmt)) {
264 const u8 *rsn;
265 struct wpa_ie_data ied;
266
267 rsn = wpa_bss_get_ie(bss, WLAN_EID_RSN);
268 if (!rsn) {
269 wpa_dbg(wpa_s, MSG_DEBUG,
270 "SAE enabled, but target BSS does not advertise RSN");
271 } else if (wpa_parse_wpa_ie(rsn, 2 + rsn[1], &ied) == 0 &&
272 wpa_key_mgmt_sae(ied.key_mgmt)) {
273 wpa_dbg(wpa_s, MSG_DEBUG, "Using SAE auth_alg");
274 params.auth_alg = WPA_AUTH_ALG_SAE;
275 } else {
276 wpa_dbg(wpa_s, MSG_DEBUG,
277 "SAE enabled, but target BSS does not advertise SAE AKM for RSN");
278 }
279 }
280 #endif /* CONFIG_SAE */
281
282 for (i = 0; i < NUM_WEP_KEYS; i++) {
283 if (ssid->wep_key_len[i])
284 params.wep_key[i] = ssid->wep_key[i];
285 params.wep_key_len[i] = ssid->wep_key_len[i];
286 }
287 params.wep_tx_keyidx = ssid->wep_tx_keyidx;
288
289 bssid_changed = !is_zero_ether_addr(wpa_s->bssid);
290 os_memset(wpa_s->bssid, 0, ETH_ALEN);
291 os_memcpy(wpa_s->pending_bssid, bss->bssid, ETH_ALEN);
292 if (bssid_changed)
293 wpas_notify_bssid_changed(wpa_s);
294
295 if ((wpa_bss_get_vendor_ie(bss, WPA_IE_VENDOR_TYPE) ||
296 wpa_bss_get_ie(bss, WLAN_EID_RSN)) &&
297 wpa_key_mgmt_wpa(ssid->key_mgmt)) {
298 int try_opportunistic;
299 try_opportunistic = (ssid->proactive_key_caching < 0 ?
300 wpa_s->conf->okc :
301 ssid->proactive_key_caching) &&
302 (ssid->proto & WPA_PROTO_RSN);
303 if (pmksa_cache_set_current(wpa_s->wpa, NULL, bss->bssid,
304 wpa_s->current_ssid,
305 try_opportunistic) == 0)
306 eapol_sm_notify_pmkid_attempt(wpa_s->eapol);
307 wpa_s->sme.assoc_req_ie_len = sizeof(wpa_s->sme.assoc_req_ie);
308 if (wpa_supplicant_set_suites(wpa_s, bss, ssid,
309 wpa_s->sme.assoc_req_ie,
310 &wpa_s->sme.assoc_req_ie_len)) {
311 wpa_msg(wpa_s, MSG_WARNING, "SME: Failed to set WPA "
312 "key management and encryption suites");
313 wpas_connect_work_done(wpa_s);
314 return;
315 }
316 } else if ((ssid->key_mgmt & WPA_KEY_MGMT_IEEE8021X_NO_WPA) &&
317 wpa_key_mgmt_wpa_ieee8021x(ssid->key_mgmt)) {
318 /*
319 * Both WPA and non-WPA IEEE 802.1X enabled in configuration -
320 * use non-WPA since the scan results did not indicate that the
321 * AP is using WPA or WPA2.
322 */
323 wpa_supplicant_set_non_wpa_policy(wpa_s, ssid);
324 wpa_s->sme.assoc_req_ie_len = 0;
325 } else if (wpa_key_mgmt_wpa_any(ssid->key_mgmt)) {
326 wpa_s->sme.assoc_req_ie_len = sizeof(wpa_s->sme.assoc_req_ie);
327 if (wpa_supplicant_set_suites(wpa_s, NULL, ssid,
328 wpa_s->sme.assoc_req_ie,
329 &wpa_s->sme.assoc_req_ie_len)) {
330 wpa_msg(wpa_s, MSG_WARNING, "SME: Failed to set WPA "
331 "key management and encryption suites (no "
332 "scan results)");
333 wpas_connect_work_done(wpa_s);
334 return;
335 }
336 #ifdef CONFIG_WPS
337 } else if (ssid->key_mgmt & WPA_KEY_MGMT_WPS) {
338 struct wpabuf *wps_ie;
339 wps_ie = wps_build_assoc_req_ie(wpas_wps_get_req_type(ssid));
340 if (wps_ie && wpabuf_len(wps_ie) <=
341 sizeof(wpa_s->sme.assoc_req_ie)) {
342 wpa_s->sme.assoc_req_ie_len = wpabuf_len(wps_ie);
343 os_memcpy(wpa_s->sme.assoc_req_ie, wpabuf_head(wps_ie),
344 wpa_s->sme.assoc_req_ie_len);
345 } else
346 wpa_s->sme.assoc_req_ie_len = 0;
347 wpabuf_free(wps_ie);
348 wpa_supplicant_set_non_wpa_policy(wpa_s, ssid);
349 #endif /* CONFIG_WPS */
350 } else {
351 wpa_supplicant_set_non_wpa_policy(wpa_s, ssid);
352 wpa_s->sme.assoc_req_ie_len = 0;
353 }
354
355 #ifdef CONFIG_IEEE80211R
356 ie = wpa_bss_get_ie(bss, WLAN_EID_MOBILITY_DOMAIN);
357 if (ie && ie[1] >= MOBILITY_DOMAIN_ID_LEN)
358 md = ie + 2;
359 wpa_sm_set_ft_params(wpa_s->wpa, ie, ie ? 2 + ie[1] : 0);
360 if (md) {
361 /* Prepare for the next transition */
362 wpa_ft_prepare_auth_request(wpa_s->wpa, ie);
363 }
364
365 if (md && wpa_key_mgmt_ft(ssid->key_mgmt)) {
366 if (wpa_s->sme.assoc_req_ie_len + 5 <
367 sizeof(wpa_s->sme.assoc_req_ie)) {
368 struct rsn_mdie *mdie;
369 u8 *pos = wpa_s->sme.assoc_req_ie +
370 wpa_s->sme.assoc_req_ie_len;
371 *pos++ = WLAN_EID_MOBILITY_DOMAIN;
372 *pos++ = sizeof(*mdie);
373 mdie = (struct rsn_mdie *) pos;
374 os_memcpy(mdie->mobility_domain, md,
375 MOBILITY_DOMAIN_ID_LEN);
376 mdie->ft_capab = md[MOBILITY_DOMAIN_ID_LEN];
377 wpa_s->sme.assoc_req_ie_len += 5;
378 }
379
380 if (wpa_s->sme.ft_used &&
381 os_memcmp(md, wpa_s->sme.mobility_domain, 2) == 0 &&
382 wpa_sm_has_ptk(wpa_s->wpa)) {
383 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Trying to use FT "
384 "over-the-air");
385 params.auth_alg = WPA_AUTH_ALG_FT;
386 params.ie = wpa_s->sme.ft_ies;
387 params.ie_len = wpa_s->sme.ft_ies_len;
388 }
389 }
390 #endif /* CONFIG_IEEE80211R */
391
392 #ifdef CONFIG_IEEE80211W
393 wpa_s->sme.mfp = wpas_get_ssid_pmf(wpa_s, ssid);
394 if (wpa_s->sme.mfp != NO_MGMT_FRAME_PROTECTION) {
395 const u8 *rsn = wpa_bss_get_ie(bss, WLAN_EID_RSN);
396 struct wpa_ie_data _ie;
397 if (rsn && wpa_parse_wpa_ie(rsn, 2 + rsn[1], &_ie) == 0 &&
398 _ie.capabilities &
399 (WPA_CAPABILITY_MFPC | WPA_CAPABILITY_MFPR)) {
400 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Selected AP supports "
401 "MFP: require MFP");
402 wpa_s->sme.mfp = MGMT_FRAME_PROTECTION_REQUIRED;
403 }
404 }
405 #endif /* CONFIG_IEEE80211W */
406
407 #ifdef CONFIG_P2P
408 if (wpa_s->global->p2p) {
409 u8 *pos;
410 size_t len;
411 int res;
412 pos = wpa_s->sme.assoc_req_ie + wpa_s->sme.assoc_req_ie_len;
413 len = sizeof(wpa_s->sme.assoc_req_ie) -
414 wpa_s->sme.assoc_req_ie_len;
415 res = wpas_p2p_assoc_req_ie(wpa_s, bss, pos, len,
416 ssid->p2p_group);
417 if (res >= 0)
418 wpa_s->sme.assoc_req_ie_len += res;
419 }
420 #endif /* CONFIG_P2P */
421
422 #ifdef CONFIG_FST
423 if (wpa_s->fst_ies) {
424 int fst_ies_len = wpabuf_len(wpa_s->fst_ies);
425
426 if (wpa_s->sme.assoc_req_ie_len + fst_ies_len <=
427 sizeof(wpa_s->sme.assoc_req_ie)) {
428 os_memcpy(wpa_s->sme.assoc_req_ie +
429 wpa_s->sme.assoc_req_ie_len,
430 wpabuf_head(wpa_s->fst_ies),
431 fst_ies_len);
432 wpa_s->sme.assoc_req_ie_len += fst_ies_len;
433 }
434 }
435 #endif /* CONFIG_FST */
436
437 sme_auth_handle_rrm(wpa_s, bss);
438
439 #ifdef CONFIG_MBO
440 mbo = wpa_bss_get_vendor_ie(bss, MBO_IE_VENDOR_TYPE);
441 if (mbo) {
442 int len;
443
444 len = wpas_mbo_supp_op_class_ie(
445 wpa_s, bss->freq,
446 wpa_s->sme.assoc_req_ie + wpa_s->sme.assoc_req_ie_len,
447 sizeof(wpa_s->sme.assoc_req_ie) -
448 wpa_s->sme.assoc_req_ie_len);
449 if (len > 0)
450 wpa_s->sme.assoc_req_ie_len += len;
451 }
452 #endif /* CONFIG_MBO */
453
454 ext_capab_len = wpas_build_ext_capab(wpa_s, ext_capab,
455 sizeof(ext_capab));
456 if (ext_capab_len > 0) {
457 u8 *pos = wpa_s->sme.assoc_req_ie;
458 if (wpa_s->sme.assoc_req_ie_len > 0 && pos[0] == WLAN_EID_RSN)
459 pos += 2 + pos[1];
460 os_memmove(pos + ext_capab_len, pos,
461 wpa_s->sme.assoc_req_ie_len -
462 (pos - wpa_s->sme.assoc_req_ie));
463 wpa_s->sme.assoc_req_ie_len += ext_capab_len;
464 os_memcpy(pos, ext_capab, ext_capab_len);
465 }
466
467 #ifdef CONFIG_HS20
468 if (is_hs20_network(wpa_s, ssid, bss)) {
469 struct wpabuf *hs20;
470
471 hs20 = wpabuf_alloc(20);
472 if (hs20) {
473 int pps_mo_id = hs20_get_pps_mo_id(wpa_s, ssid);
474 size_t len;
475
476 wpas_hs20_add_indication(hs20, pps_mo_id);
477 len = sizeof(wpa_s->sme.assoc_req_ie) -
478 wpa_s->sme.assoc_req_ie_len;
479 if (wpabuf_len(hs20) <= len) {
480 os_memcpy(wpa_s->sme.assoc_req_ie +
481 wpa_s->sme.assoc_req_ie_len,
482 wpabuf_head(hs20), wpabuf_len(hs20));
483 wpa_s->sme.assoc_req_ie_len += wpabuf_len(hs20);
484 }
485 wpabuf_free(hs20);
486 }
487 }
488 #endif /* CONFIG_HS20 */
489
490 if (wpa_s->vendor_elem[VENDOR_ELEM_ASSOC_REQ]) {
491 struct wpabuf *buf = wpa_s->vendor_elem[VENDOR_ELEM_ASSOC_REQ];
492 size_t len;
493
494 len = sizeof(wpa_s->sme.assoc_req_ie) -
495 wpa_s->sme.assoc_req_ie_len;
496 if (wpabuf_len(buf) <= len) {
497 os_memcpy(wpa_s->sme.assoc_req_ie +
498 wpa_s->sme.assoc_req_ie_len,
499 wpabuf_head(buf), wpabuf_len(buf));
500 wpa_s->sme.assoc_req_ie_len += wpabuf_len(buf);
501 }
502 }
503
504 #ifdef CONFIG_MBO
505 if (mbo) {
506 int len;
507
508 len = wpas_mbo_ie(wpa_s, wpa_s->sme.assoc_req_ie +
509 wpa_s->sme.assoc_req_ie_len,
510 sizeof(wpa_s->sme.assoc_req_ie) -
511 wpa_s->sme.assoc_req_ie_len);
512 if (len >= 0)
513 wpa_s->sme.assoc_req_ie_len += len;
514 }
515 #endif /* CONFIG_MBO */
516
517 #ifdef CONFIG_SAE
518 if (!skip_auth && params.auth_alg == WPA_AUTH_ALG_SAE &&
519 pmksa_cache_set_current(wpa_s->wpa, NULL, bss->bssid, ssid, 0) == 0)
520 {
521 wpa_dbg(wpa_s, MSG_DEBUG,
522 "PMKSA cache entry found - try to use PMKSA caching instead of new SAE authentication");
523 params.auth_alg = WPA_AUTH_ALG_OPEN;
524 wpa_s->sme.sae_pmksa_caching = 1;
525 }
526
527 if (!skip_auth && params.auth_alg == WPA_AUTH_ALG_SAE) {
528 if (start)
529 resp = sme_auth_build_sae_commit(wpa_s, ssid,
530 bss->bssid);
531 else
532 resp = sme_auth_build_sae_confirm(wpa_s);
533 if (resp == NULL) {
534 wpas_connection_failed(wpa_s, bss->bssid);
535 return;
536 }
537 params.sae_data = wpabuf_head(resp);
538 params.sae_data_len = wpabuf_len(resp);
539 wpa_s->sme.sae.state = start ? SAE_COMMITTED : SAE_CONFIRMED;
540 }
541 #endif /* CONFIG_SAE */
542
543 wpa_supplicant_cancel_sched_scan(wpa_s);
544 wpa_supplicant_cancel_scan(wpa_s);
545
546 wpa_msg(wpa_s, MSG_INFO, "SME: Trying to authenticate with " MACSTR
547 " (SSID='%s' freq=%d MHz)", MAC2STR(params.bssid),
548 wpa_ssid_txt(params.ssid, params.ssid_len), params.freq);
549
550 wpa_clear_keys(wpa_s, bss->bssid);
551 wpa_supplicant_set_state(wpa_s, WPA_AUTHENTICATING);
552 old_ssid = wpa_s->current_ssid;
553 wpa_s->current_ssid = ssid;
554 wpa_supplicant_rsn_supp_set_config(wpa_s, wpa_s->current_ssid);
555 wpa_supplicant_initiate_eapol(wpa_s);
556 if (old_ssid != wpa_s->current_ssid)
557 wpas_notify_network_changed(wpa_s);
558
559 #ifdef CONFIG_P2P
560 /*
561 * If multi-channel concurrency is not supported, check for any
562 * frequency conflict. In case of any frequency conflict, remove the
563 * least prioritized connection.
564 */
565 if (wpa_s->num_multichan_concurrent < 2) {
566 int freq, num;
567 num = get_shared_radio_freqs(wpa_s, &freq, 1);
568 if (num > 0 && freq > 0 && freq != params.freq) {
569 wpa_printf(MSG_DEBUG,
570 "Conflicting frequency found (%d != %d)",
571 freq, params.freq);
572 if (wpas_p2p_handle_frequency_conflicts(wpa_s,
573 params.freq,
574 ssid) < 0) {
575 wpas_connection_failed(wpa_s, bss->bssid);
576 wpa_supplicant_mark_disassoc(wpa_s);
577 wpabuf_free(resp);
578 wpas_connect_work_done(wpa_s);
579 return;
580 }
581 }
582 }
583 #endif /* CONFIG_P2P */
584
585 if (skip_auth) {
586 wpa_msg(wpa_s, MSG_DEBUG,
587 "SME: Skip authentication step on reassoc-to-same-BSS");
588 wpabuf_free(resp);
589 sme_associate(wpa_s, ssid->mode, bss->bssid, WLAN_AUTH_OPEN);
590 return;
591 }
592
593
594 wpa_s->sme.auth_alg = params.auth_alg;
595 if (wpa_drv_authenticate(wpa_s, ¶ms) < 0) {
596 wpa_msg(wpa_s, MSG_INFO, "SME: Authentication request to the "
597 "driver failed");
598 wpas_connection_failed(wpa_s, bss->bssid);
599 wpa_supplicant_mark_disassoc(wpa_s);
600 wpabuf_free(resp);
601 wpas_connect_work_done(wpa_s);
602 return;
603 }
604
605 eloop_register_timeout(SME_AUTH_TIMEOUT, 0, sme_auth_timer, wpa_s,
606 NULL);
607
608 /*
609 * Association will be started based on the authentication event from
610 * the driver.
611 */
612
613 wpabuf_free(resp);
614 }
615
616
sme_auth_start_cb(struct wpa_radio_work * work,int deinit)617 static void sme_auth_start_cb(struct wpa_radio_work *work, int deinit)
618 {
619 struct wpa_connect_work *cwork = work->ctx;
620 struct wpa_supplicant *wpa_s = work->wpa_s;
621
622 if (deinit) {
623 if (work->started)
624 wpa_s->connect_work = NULL;
625
626 wpas_connect_work_free(cwork);
627 return;
628 }
629
630 wpa_s->connect_work = work;
631
632 if (cwork->bss_removed ||
633 !wpas_valid_bss_ssid(wpa_s, cwork->bss, cwork->ssid) ||
634 wpas_network_disabled(wpa_s, cwork->ssid)) {
635 wpa_dbg(wpa_s, MSG_DEBUG, "SME: BSS/SSID entry for authentication not valid anymore - drop connection attempt");
636 wpas_connect_work_done(wpa_s);
637 return;
638 }
639
640 sme_send_authentication(wpa_s, cwork->bss, cwork->ssid, 1);
641 }
642
643
sme_authenticate(struct wpa_supplicant * wpa_s,struct wpa_bss * bss,struct wpa_ssid * ssid)644 void sme_authenticate(struct wpa_supplicant *wpa_s,
645 struct wpa_bss *bss, struct wpa_ssid *ssid)
646 {
647 struct wpa_connect_work *cwork;
648
649 if (bss == NULL || ssid == NULL)
650 return;
651 if (wpa_s->connect_work) {
652 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Reject sme_authenticate() call since connect_work exist");
653 return;
654 }
655
656 if (radio_work_pending(wpa_s, "sme-connect")) {
657 /*
658 * The previous sme-connect work might no longer be valid due to
659 * the fact that the BSS list was updated. In addition, it makes
660 * sense to adhere to the 'newer' decision.
661 */
662 wpa_dbg(wpa_s, MSG_DEBUG,
663 "SME: Remove previous pending sme-connect");
664 radio_remove_works(wpa_s, "sme-connect", 0);
665 }
666
667 wpas_abort_ongoing_scan(wpa_s);
668
669 cwork = os_zalloc(sizeof(*cwork));
670 if (cwork == NULL)
671 return;
672 cwork->bss = bss;
673 cwork->ssid = ssid;
674 cwork->sme = 1;
675
676 #ifdef CONFIG_SAE
677 wpa_s->sme.sae.state = SAE_NOTHING;
678 wpa_s->sme.sae.send_confirm = 0;
679 wpa_s->sme.sae_group_index = 0;
680 #endif /* CONFIG_SAE */
681
682 if (radio_add_work(wpa_s, bss->freq, "sme-connect", 1,
683 sme_auth_start_cb, cwork) < 0)
684 wpas_connect_work_free(cwork);
685 }
686
687
688 #ifdef CONFIG_SAE
689
sme_sae_auth(struct wpa_supplicant * wpa_s,u16 auth_transaction,u16 status_code,const u8 * data,size_t len)690 static int sme_sae_auth(struct wpa_supplicant *wpa_s, u16 auth_transaction,
691 u16 status_code, const u8 *data, size_t len)
692 {
693 int *groups;
694
695 wpa_dbg(wpa_s, MSG_DEBUG, "SME: SAE authentication transaction %u "
696 "status code %u", auth_transaction, status_code);
697
698 if (auth_transaction == 1 &&
699 status_code == WLAN_STATUS_ANTI_CLOGGING_TOKEN_REQ &&
700 wpa_s->sme.sae.state == SAE_COMMITTED &&
701 wpa_s->current_bss && wpa_s->current_ssid) {
702 int default_groups[] = { 19, 20, 21, 25, 26, 0 };
703 u16 group;
704
705 groups = wpa_s->conf->sae_groups;
706 if (!groups || groups[0] <= 0)
707 groups = default_groups;
708
709 if (len < sizeof(le16)) {
710 wpa_dbg(wpa_s, MSG_DEBUG,
711 "SME: Too short SAE anti-clogging token request");
712 return -1;
713 }
714 group = WPA_GET_LE16(data);
715 wpa_dbg(wpa_s, MSG_DEBUG,
716 "SME: SAE anti-clogging token requested (group %u)",
717 group);
718 if (sae_group_allowed(&wpa_s->sme.sae, groups, group) !=
719 WLAN_STATUS_SUCCESS) {
720 wpa_dbg(wpa_s, MSG_ERROR,
721 "SME: SAE group %u of anti-clogging request is invalid",
722 group);
723 return -1;
724 }
725 wpabuf_free(wpa_s->sme.sae_token);
726 wpa_s->sme.sae_token = wpabuf_alloc_copy(data + sizeof(le16),
727 len - sizeof(le16));
728 sme_send_authentication(wpa_s, wpa_s->current_bss,
729 wpa_s->current_ssid, 1);
730 return 0;
731 }
732
733 if (auth_transaction == 1 &&
734 status_code == WLAN_STATUS_FINITE_CYCLIC_GROUP_NOT_SUPPORTED &&
735 wpa_s->sme.sae.state == SAE_COMMITTED &&
736 wpa_s->current_bss && wpa_s->current_ssid) {
737 wpa_dbg(wpa_s, MSG_DEBUG, "SME: SAE group not supported");
738 wpa_s->sme.sae_group_index++;
739 if (sme_set_sae_group(wpa_s) < 0)
740 return -1; /* no other groups enabled */
741 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Try next enabled SAE group");
742 sme_send_authentication(wpa_s, wpa_s->current_bss,
743 wpa_s->current_ssid, 1);
744 return 0;
745 }
746
747 if (status_code != WLAN_STATUS_SUCCESS)
748 return -1;
749
750 if (auth_transaction == 1) {
751 u16 res;
752
753 groups = wpa_s->conf->sae_groups;
754
755 wpa_dbg(wpa_s, MSG_DEBUG, "SME SAE commit");
756 if (wpa_s->current_bss == NULL ||
757 wpa_s->current_ssid == NULL)
758 return -1;
759 if (wpa_s->sme.sae.state != SAE_COMMITTED)
760 return -1;
761 if (groups && groups[0] <= 0)
762 groups = NULL;
763 res = sae_parse_commit(&wpa_s->sme.sae, data, len, NULL, NULL,
764 groups);
765 if (res == SAE_SILENTLY_DISCARD) {
766 wpa_printf(MSG_DEBUG,
767 "SAE: Drop commit message due to reflection attack");
768 return 0;
769 }
770 if (res != WLAN_STATUS_SUCCESS)
771 return -1;
772
773 if (sae_process_commit(&wpa_s->sme.sae) < 0) {
774 wpa_printf(MSG_DEBUG, "SAE: Failed to process peer "
775 "commit");
776 return -1;
777 }
778
779 wpabuf_free(wpa_s->sme.sae_token);
780 wpa_s->sme.sae_token = NULL;
781 sme_send_authentication(wpa_s, wpa_s->current_bss,
782 wpa_s->current_ssid, 0);
783 return 0;
784 } else if (auth_transaction == 2) {
785 wpa_dbg(wpa_s, MSG_DEBUG, "SME SAE confirm");
786 if (wpa_s->sme.sae.state != SAE_CONFIRMED)
787 return -1;
788 if (sae_check_confirm(&wpa_s->sme.sae, data, len) < 0)
789 return -1;
790 wpa_s->sme.sae.state = SAE_ACCEPTED;
791 sae_clear_temp_data(&wpa_s->sme.sae);
792 return 1;
793 }
794
795 return -1;
796 }
797 #endif /* CONFIG_SAE */
798
799
sme_event_auth(struct wpa_supplicant * wpa_s,union wpa_event_data * data)800 void sme_event_auth(struct wpa_supplicant *wpa_s, union wpa_event_data *data)
801 {
802 struct wpa_ssid *ssid = wpa_s->current_ssid;
803
804 if (ssid == NULL) {
805 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Ignore authentication event "
806 "when network is not selected");
807 return;
808 }
809
810 if (wpa_s->wpa_state != WPA_AUTHENTICATING) {
811 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Ignore authentication event "
812 "when not in authenticating state");
813 return;
814 }
815
816 if (os_memcmp(wpa_s->pending_bssid, data->auth.peer, ETH_ALEN) != 0) {
817 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Ignore authentication with "
818 "unexpected peer " MACSTR,
819 MAC2STR(data->auth.peer));
820 return;
821 }
822
823 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Authentication response: peer=" MACSTR
824 " auth_type=%d auth_transaction=%d status_code=%d",
825 MAC2STR(data->auth.peer), data->auth.auth_type,
826 data->auth.auth_transaction, data->auth.status_code);
827 wpa_hexdump(MSG_MSGDUMP, "SME: Authentication response IEs",
828 data->auth.ies, data->auth.ies_len);
829
830 eloop_cancel_timeout(sme_auth_timer, wpa_s, NULL);
831
832 #ifdef CONFIG_SAE
833 if (data->auth.auth_type == WLAN_AUTH_SAE) {
834 int res;
835 res = sme_sae_auth(wpa_s, data->auth.auth_transaction,
836 data->auth.status_code, data->auth.ies,
837 data->auth.ies_len);
838 if (res < 0) {
839 wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
840 wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED);
841
842 }
843 if (res != 1)
844 return;
845
846 wpa_printf(MSG_DEBUG, "SME: SAE completed - setting PMK for "
847 "4-way handshake");
848 wpa_sm_set_pmk(wpa_s->wpa, wpa_s->sme.sae.pmk, PMK_LEN,
849 wpa_s->sme.sae.pmkid, wpa_s->pending_bssid);
850 }
851 #endif /* CONFIG_SAE */
852
853 if (data->auth.status_code != WLAN_STATUS_SUCCESS) {
854 char *ie_txt = NULL;
855
856 if (data->auth.ies && data->auth.ies_len) {
857 size_t buflen = 2 * data->auth.ies_len + 1;
858 ie_txt = os_malloc(buflen);
859 if (ie_txt) {
860 wpa_snprintf_hex(ie_txt, buflen, data->auth.ies,
861 data->auth.ies_len);
862 }
863 }
864 wpa_msg(wpa_s, MSG_INFO, WPA_EVENT_AUTH_REJECT MACSTR
865 " auth_type=%u auth_transaction=%u status_code=%u ie=%s",
866 MAC2STR(data->auth.peer), data->auth.auth_type,
867 data->auth.auth_transaction, data->auth.status_code,
868 ie_txt);
869 os_free(ie_txt);
870
871 if (data->auth.status_code !=
872 WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG ||
873 wpa_s->sme.auth_alg == data->auth.auth_type ||
874 wpa_s->current_ssid->auth_alg == WPA_AUTH_ALG_LEAP) {
875 wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
876 wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED);
877 return;
878 }
879
880 wpas_connect_work_done(wpa_s);
881
882 switch (data->auth.auth_type) {
883 case WLAN_AUTH_OPEN:
884 wpa_s->current_ssid->auth_alg = WPA_AUTH_ALG_SHARED;
885
886 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Trying SHARED auth");
887 wpa_supplicant_associate(wpa_s, wpa_s->current_bss,
888 wpa_s->current_ssid);
889 return;
890
891 case WLAN_AUTH_SHARED_KEY:
892 wpa_s->current_ssid->auth_alg = WPA_AUTH_ALG_LEAP;
893
894 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Trying LEAP auth");
895 wpa_supplicant_associate(wpa_s, wpa_s->current_bss,
896 wpa_s->current_ssid);
897 return;
898
899 default:
900 return;
901 }
902 }
903
904 #ifdef CONFIG_IEEE80211R
905 if (data->auth.auth_type == WLAN_AUTH_FT) {
906 if (wpa_ft_process_response(wpa_s->wpa, data->auth.ies,
907 data->auth.ies_len, 0,
908 data->auth.peer, NULL, 0) < 0) {
909 wpa_dbg(wpa_s, MSG_DEBUG,
910 "SME: FT Authentication response processing failed");
911 wpa_msg(wpa_s, MSG_INFO, WPA_EVENT_DISCONNECTED "bssid="
912 MACSTR
913 " reason=%d locally_generated=1",
914 MAC2STR(wpa_s->pending_bssid),
915 WLAN_REASON_DEAUTH_LEAVING);
916 wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
917 wpa_supplicant_mark_disassoc(wpa_s);
918 return;
919 }
920 }
921 #endif /* CONFIG_IEEE80211R */
922
923 sme_associate(wpa_s, ssid->mode, data->auth.peer,
924 data->auth.auth_type);
925 }
926
927
sme_associate(struct wpa_supplicant * wpa_s,enum wpas_mode mode,const u8 * bssid,u16 auth_type)928 void sme_associate(struct wpa_supplicant *wpa_s, enum wpas_mode mode,
929 const u8 *bssid, u16 auth_type)
930 {
931 struct wpa_driver_associate_params params;
932 struct ieee802_11_elems elems;
933 #ifdef CONFIG_HT_OVERRIDES
934 struct ieee80211_ht_capabilities htcaps;
935 struct ieee80211_ht_capabilities htcaps_mask;
936 #endif /* CONFIG_HT_OVERRIDES */
937 #ifdef CONFIG_VHT_OVERRIDES
938 struct ieee80211_vht_capabilities vhtcaps;
939 struct ieee80211_vht_capabilities vhtcaps_mask;
940 #endif /* CONFIG_VHT_OVERRIDES */
941
942 os_memset(¶ms, 0, sizeof(params));
943 params.bssid = bssid;
944 params.ssid = wpa_s->sme.ssid;
945 params.ssid_len = wpa_s->sme.ssid_len;
946 params.freq.freq = wpa_s->sme.freq;
947 params.bg_scan_period = wpa_s->current_ssid ?
948 wpa_s->current_ssid->bg_scan_period : -1;
949 params.wpa_ie = wpa_s->sme.assoc_req_ie_len ?
950 wpa_s->sme.assoc_req_ie : NULL;
951 params.wpa_ie_len = wpa_s->sme.assoc_req_ie_len;
952 params.pairwise_suite = wpa_s->pairwise_cipher;
953 params.group_suite = wpa_s->group_cipher;
954 params.key_mgmt_suite = wpa_s->key_mgmt;
955 params.wpa_proto = wpa_s->wpa_proto;
956 #ifdef CONFIG_HT_OVERRIDES
957 os_memset(&htcaps, 0, sizeof(htcaps));
958 os_memset(&htcaps_mask, 0, sizeof(htcaps_mask));
959 params.htcaps = (u8 *) &htcaps;
960 params.htcaps_mask = (u8 *) &htcaps_mask;
961 wpa_supplicant_apply_ht_overrides(wpa_s, wpa_s->current_ssid, ¶ms);
962 #endif /* CONFIG_HT_OVERRIDES */
963 #ifdef CONFIG_VHT_OVERRIDES
964 os_memset(&vhtcaps, 0, sizeof(vhtcaps));
965 os_memset(&vhtcaps_mask, 0, sizeof(vhtcaps_mask));
966 params.vhtcaps = &vhtcaps;
967 params.vhtcaps_mask = &vhtcaps_mask;
968 wpa_supplicant_apply_vht_overrides(wpa_s, wpa_s->current_ssid, ¶ms);
969 #endif /* CONFIG_VHT_OVERRIDES */
970 #ifdef CONFIG_IEEE80211R
971 if (auth_type == WLAN_AUTH_FT && wpa_s->sme.ft_ies) {
972 params.wpa_ie = wpa_s->sme.ft_ies;
973 params.wpa_ie_len = wpa_s->sme.ft_ies_len;
974 }
975 #endif /* CONFIG_IEEE80211R */
976 params.mode = mode;
977 params.mgmt_frame_protection = wpa_s->sme.mfp;
978 params.rrm_used = wpa_s->rrm.rrm_used;
979 if (wpa_s->sme.prev_bssid_set)
980 params.prev_bssid = wpa_s->sme.prev_bssid;
981
982 wpa_msg(wpa_s, MSG_INFO, "Trying to associate with " MACSTR
983 " (SSID='%s' freq=%d MHz)", MAC2STR(params.bssid),
984 params.ssid ? wpa_ssid_txt(params.ssid, params.ssid_len) : "",
985 params.freq.freq);
986
987 wpa_supplicant_set_state(wpa_s, WPA_ASSOCIATING);
988
989 if (params.wpa_ie == NULL ||
990 ieee802_11_parse_elems(params.wpa_ie, params.wpa_ie_len, &elems, 0)
991 < 0) {
992 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Could not parse own IEs?!");
993 os_memset(&elems, 0, sizeof(elems));
994 }
995 if (elems.rsn_ie) {
996 params.wpa_proto = WPA_PROTO_RSN;
997 wpa_sm_set_assoc_wpa_ie(wpa_s->wpa, elems.rsn_ie - 2,
998 elems.rsn_ie_len + 2);
999 } else if (elems.wpa_ie) {
1000 params.wpa_proto = WPA_PROTO_WPA;
1001 wpa_sm_set_assoc_wpa_ie(wpa_s->wpa, elems.wpa_ie - 2,
1002 elems.wpa_ie_len + 2);
1003 } else if (elems.osen) {
1004 params.wpa_proto = WPA_PROTO_OSEN;
1005 wpa_sm_set_assoc_wpa_ie(wpa_s->wpa, elems.osen - 2,
1006 elems.osen_len + 2);
1007 } else
1008 wpa_sm_set_assoc_wpa_ie(wpa_s->wpa, NULL, 0);
1009 if (wpa_s->current_ssid && wpa_s->current_ssid->p2p_group)
1010 params.p2p = 1;
1011
1012 if (wpa_s->p2pdev->set_sta_uapsd)
1013 params.uapsd = wpa_s->p2pdev->sta_uapsd;
1014 else
1015 params.uapsd = -1;
1016
1017 if (wpa_drv_associate(wpa_s, ¶ms) < 0) {
1018 wpa_msg(wpa_s, MSG_INFO, "SME: Association request to the "
1019 "driver failed");
1020 wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
1021 wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED);
1022 os_memset(wpa_s->pending_bssid, 0, ETH_ALEN);
1023 return;
1024 }
1025
1026 eloop_register_timeout(SME_ASSOC_TIMEOUT, 0, sme_assoc_timer, wpa_s,
1027 NULL);
1028 }
1029
1030
sme_update_ft_ies(struct wpa_supplicant * wpa_s,const u8 * md,const u8 * ies,size_t ies_len)1031 int sme_update_ft_ies(struct wpa_supplicant *wpa_s, const u8 *md,
1032 const u8 *ies, size_t ies_len)
1033 {
1034 if (md == NULL || ies == NULL) {
1035 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Remove mobility domain");
1036 os_free(wpa_s->sme.ft_ies);
1037 wpa_s->sme.ft_ies = NULL;
1038 wpa_s->sme.ft_ies_len = 0;
1039 wpa_s->sme.ft_used = 0;
1040 return 0;
1041 }
1042
1043 os_memcpy(wpa_s->sme.mobility_domain, md, MOBILITY_DOMAIN_ID_LEN);
1044 wpa_hexdump(MSG_DEBUG, "SME: FT IEs", ies, ies_len);
1045 os_free(wpa_s->sme.ft_ies);
1046 wpa_s->sme.ft_ies = os_malloc(ies_len);
1047 if (wpa_s->sme.ft_ies == NULL)
1048 return -1;
1049 os_memcpy(wpa_s->sme.ft_ies, ies, ies_len);
1050 wpa_s->sme.ft_ies_len = ies_len;
1051 return 0;
1052 }
1053
1054
sme_deauth(struct wpa_supplicant * wpa_s)1055 static void sme_deauth(struct wpa_supplicant *wpa_s)
1056 {
1057 int bssid_changed;
1058
1059 bssid_changed = !is_zero_ether_addr(wpa_s->bssid);
1060
1061 if (wpa_drv_deauthenticate(wpa_s, wpa_s->pending_bssid,
1062 WLAN_REASON_DEAUTH_LEAVING) < 0) {
1063 wpa_msg(wpa_s, MSG_INFO, "SME: Deauth request to the driver "
1064 "failed");
1065 }
1066 wpa_s->sme.prev_bssid_set = 0;
1067
1068 wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
1069 wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED);
1070 os_memset(wpa_s->bssid, 0, ETH_ALEN);
1071 os_memset(wpa_s->pending_bssid, 0, ETH_ALEN);
1072 if (bssid_changed)
1073 wpas_notify_bssid_changed(wpa_s);
1074 }
1075
1076
sme_event_assoc_reject(struct wpa_supplicant * wpa_s,union wpa_event_data * data)1077 void sme_event_assoc_reject(struct wpa_supplicant *wpa_s,
1078 union wpa_event_data *data)
1079 {
1080 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Association with " MACSTR " failed: "
1081 "status code %d", MAC2STR(wpa_s->pending_bssid),
1082 data->assoc_reject.status_code);
1083
1084 eloop_cancel_timeout(sme_assoc_timer, wpa_s, NULL);
1085
1086 #ifdef CONFIG_SAE
1087 if (wpa_s->sme.sae_pmksa_caching && wpa_s->current_ssid &&
1088 wpa_key_mgmt_sae(wpa_s->current_ssid->key_mgmt)) {
1089 wpa_dbg(wpa_s, MSG_DEBUG,
1090 "PMKSA caching attempt rejected - drop PMKSA cache entry and fall back to SAE authentication");
1091 wpa_sm_aborted_cached(wpa_s->wpa);
1092 wpa_sm_pmksa_cache_flush(wpa_s->wpa, wpa_s->current_ssid);
1093 if (wpa_s->current_bss) {
1094 struct wpa_bss *bss = wpa_s->current_bss;
1095 struct wpa_ssid *ssid = wpa_s->current_ssid;
1096
1097 wpa_drv_deauthenticate(wpa_s, wpa_s->pending_bssid,
1098 WLAN_REASON_DEAUTH_LEAVING);
1099 wpas_connect_work_done(wpa_s);
1100 wpa_supplicant_mark_disassoc(wpa_s);
1101 wpa_supplicant_connect(wpa_s, bss, ssid);
1102 return;
1103 }
1104 }
1105 #endif /* CONFIG_SAE */
1106
1107 /*
1108 * For now, unconditionally terminate the previous authentication. In
1109 * theory, this should not be needed, but mac80211 gets quite confused
1110 * if the authentication is left pending.. Some roaming cases might
1111 * benefit from using the previous authentication, so this could be
1112 * optimized in the future.
1113 */
1114 sme_deauth(wpa_s);
1115 }
1116
1117
sme_event_auth_timed_out(struct wpa_supplicant * wpa_s,union wpa_event_data * data)1118 void sme_event_auth_timed_out(struct wpa_supplicant *wpa_s,
1119 union wpa_event_data *data)
1120 {
1121 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Authentication timed out");
1122 wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
1123 wpa_supplicant_mark_disassoc(wpa_s);
1124 }
1125
1126
sme_event_assoc_timed_out(struct wpa_supplicant * wpa_s,union wpa_event_data * data)1127 void sme_event_assoc_timed_out(struct wpa_supplicant *wpa_s,
1128 union wpa_event_data *data)
1129 {
1130 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Association timed out");
1131 wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
1132 wpa_supplicant_mark_disassoc(wpa_s);
1133 }
1134
1135
sme_event_disassoc(struct wpa_supplicant * wpa_s,struct disassoc_info * info)1136 void sme_event_disassoc(struct wpa_supplicant *wpa_s,
1137 struct disassoc_info *info)
1138 {
1139 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Disassociation event received");
1140 if (wpa_s->sme.prev_bssid_set) {
1141 /*
1142 * cfg80211/mac80211 can get into somewhat confused state if
1143 * the AP only disassociates us and leaves us in authenticated
1144 * state. For now, force the state to be cleared to avoid
1145 * confusing errors if we try to associate with the AP again.
1146 */
1147 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Deauthenticate to clear "
1148 "driver state");
1149 wpa_drv_deauthenticate(wpa_s, wpa_s->sme.prev_bssid,
1150 WLAN_REASON_DEAUTH_LEAVING);
1151 }
1152 }
1153
1154
sme_auth_timer(void * eloop_ctx,void * timeout_ctx)1155 static void sme_auth_timer(void *eloop_ctx, void *timeout_ctx)
1156 {
1157 struct wpa_supplicant *wpa_s = eloop_ctx;
1158 if (wpa_s->wpa_state == WPA_AUTHENTICATING) {
1159 wpa_msg(wpa_s, MSG_DEBUG, "SME: Authentication timeout");
1160 sme_deauth(wpa_s);
1161 }
1162 }
1163
1164
sme_assoc_timer(void * eloop_ctx,void * timeout_ctx)1165 static void sme_assoc_timer(void *eloop_ctx, void *timeout_ctx)
1166 {
1167 struct wpa_supplicant *wpa_s = eloop_ctx;
1168 if (wpa_s->wpa_state == WPA_ASSOCIATING) {
1169 wpa_msg(wpa_s, MSG_DEBUG, "SME: Association timeout");
1170 sme_deauth(wpa_s);
1171 }
1172 }
1173
1174
sme_state_changed(struct wpa_supplicant * wpa_s)1175 void sme_state_changed(struct wpa_supplicant *wpa_s)
1176 {
1177 /* Make sure timers are cleaned up appropriately. */
1178 if (wpa_s->wpa_state != WPA_ASSOCIATING)
1179 eloop_cancel_timeout(sme_assoc_timer, wpa_s, NULL);
1180 if (wpa_s->wpa_state != WPA_AUTHENTICATING)
1181 eloop_cancel_timeout(sme_auth_timer, wpa_s, NULL);
1182 }
1183
1184
sme_disassoc_while_authenticating(struct wpa_supplicant * wpa_s,const u8 * prev_pending_bssid)1185 void sme_disassoc_while_authenticating(struct wpa_supplicant *wpa_s,
1186 const u8 *prev_pending_bssid)
1187 {
1188 /*
1189 * mac80211-workaround to force deauth on failed auth cmd,
1190 * requires us to remain in authenticating state to allow the
1191 * second authentication attempt to be continued properly.
1192 */
1193 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Allow pending authentication "
1194 "to proceed after disconnection event");
1195 wpa_supplicant_set_state(wpa_s, WPA_AUTHENTICATING);
1196 os_memcpy(wpa_s->pending_bssid, prev_pending_bssid, ETH_ALEN);
1197
1198 /*
1199 * Re-arm authentication timer in case auth fails for whatever reason.
1200 */
1201 eloop_cancel_timeout(sme_auth_timer, wpa_s, NULL);
1202 eloop_register_timeout(SME_AUTH_TIMEOUT, 0, sme_auth_timer, wpa_s,
1203 NULL);
1204 }
1205
1206
sme_clear_on_disassoc(struct wpa_supplicant * wpa_s)1207 void sme_clear_on_disassoc(struct wpa_supplicant *wpa_s)
1208 {
1209 wpa_s->sme.prev_bssid_set = 0;
1210 #ifdef CONFIG_SAE
1211 wpabuf_free(wpa_s->sme.sae_token);
1212 wpa_s->sme.sae_token = NULL;
1213 sae_clear_data(&wpa_s->sme.sae);
1214 #endif /* CONFIG_SAE */
1215 #ifdef CONFIG_IEEE80211R
1216 if (wpa_s->sme.ft_ies)
1217 sme_update_ft_ies(wpa_s, NULL, NULL, 0);
1218 #endif /* CONFIG_IEEE80211R */
1219 }
1220
1221
sme_deinit(struct wpa_supplicant * wpa_s)1222 void sme_deinit(struct wpa_supplicant *wpa_s)
1223 {
1224 os_free(wpa_s->sme.ft_ies);
1225 wpa_s->sme.ft_ies = NULL;
1226 wpa_s->sme.ft_ies_len = 0;
1227 #ifdef CONFIG_IEEE80211W
1228 sme_stop_sa_query(wpa_s);
1229 #endif /* CONFIG_IEEE80211W */
1230 sme_clear_on_disassoc(wpa_s);
1231
1232 eloop_cancel_timeout(sme_assoc_timer, wpa_s, NULL);
1233 eloop_cancel_timeout(sme_auth_timer, wpa_s, NULL);
1234 eloop_cancel_timeout(sme_obss_scan_timeout, wpa_s, NULL);
1235 }
1236
1237
sme_send_2040_bss_coex(struct wpa_supplicant * wpa_s,const u8 * chan_list,u8 num_channels,u8 num_intol)1238 static void sme_send_2040_bss_coex(struct wpa_supplicant *wpa_s,
1239 const u8 *chan_list, u8 num_channels,
1240 u8 num_intol)
1241 {
1242 struct ieee80211_2040_bss_coex_ie *bc_ie;
1243 struct ieee80211_2040_intol_chan_report *ic_report;
1244 struct wpabuf *buf;
1245
1246 wpa_printf(MSG_DEBUG, "SME: Send 20/40 BSS Coexistence to " MACSTR
1247 " (num_channels=%u num_intol=%u)",
1248 MAC2STR(wpa_s->bssid), num_channels, num_intol);
1249 wpa_hexdump(MSG_DEBUG, "SME: 20/40 BSS Intolerant Channels",
1250 chan_list, num_channels);
1251
1252 buf = wpabuf_alloc(2 + /* action.category + action_code */
1253 sizeof(struct ieee80211_2040_bss_coex_ie) +
1254 sizeof(struct ieee80211_2040_intol_chan_report) +
1255 num_channels);
1256 if (buf == NULL)
1257 return;
1258
1259 wpabuf_put_u8(buf, WLAN_ACTION_PUBLIC);
1260 wpabuf_put_u8(buf, WLAN_PA_20_40_BSS_COEX);
1261
1262 bc_ie = wpabuf_put(buf, sizeof(*bc_ie));
1263 bc_ie->element_id = WLAN_EID_20_40_BSS_COEXISTENCE;
1264 bc_ie->length = 1;
1265 if (num_intol)
1266 bc_ie->coex_param |= WLAN_20_40_BSS_COEX_20MHZ_WIDTH_REQ;
1267
1268 if (num_channels > 0) {
1269 ic_report = wpabuf_put(buf, sizeof(*ic_report));
1270 ic_report->element_id = WLAN_EID_20_40_BSS_INTOLERANT;
1271 ic_report->length = num_channels + 1;
1272 ic_report->op_class = 0;
1273 os_memcpy(wpabuf_put(buf, num_channels), chan_list,
1274 num_channels);
1275 }
1276
1277 if (wpa_drv_send_action(wpa_s, wpa_s->assoc_freq, 0, wpa_s->bssid,
1278 wpa_s->own_addr, wpa_s->bssid,
1279 wpabuf_head(buf), wpabuf_len(buf), 0) < 0) {
1280 wpa_msg(wpa_s, MSG_INFO,
1281 "SME: Failed to send 20/40 BSS Coexistence frame");
1282 }
1283
1284 wpabuf_free(buf);
1285 }
1286
1287
sme_proc_obss_scan(struct wpa_supplicant * wpa_s)1288 int sme_proc_obss_scan(struct wpa_supplicant *wpa_s)
1289 {
1290 struct wpa_bss *bss;
1291 const u8 *ie;
1292 u16 ht_cap;
1293 u8 chan_list[P2P_MAX_CHANNELS], channel;
1294 u8 num_channels = 0, num_intol = 0, i;
1295
1296 if (!wpa_s->sme.sched_obss_scan)
1297 return 0;
1298
1299 wpa_s->sme.sched_obss_scan = 0;
1300 if (!wpa_s->current_bss || wpa_s->wpa_state != WPA_COMPLETED)
1301 return 1;
1302
1303 /*
1304 * Check whether AP uses regulatory triplet or channel triplet in
1305 * country info. Right now the operating class of the BSS channel
1306 * width trigger event is "unknown" (IEEE Std 802.11-2012 10.15.12),
1307 * based on the assumption that operating class triplet is not used in
1308 * beacon frame. If the First Channel Number/Operating Extension
1309 * Identifier octet has a positive integer value of 201 or greater,
1310 * then its operating class triplet.
1311 *
1312 * TODO: If Supported Operating Classes element is present in beacon
1313 * frame, have to lookup operating class in Annex E and fill them in
1314 * 2040 coex frame.
1315 */
1316 ie = wpa_bss_get_ie(wpa_s->current_bss, WLAN_EID_COUNTRY);
1317 if (ie && (ie[1] >= 6) && (ie[5] >= 201))
1318 return 1;
1319
1320 os_memset(chan_list, 0, sizeof(chan_list));
1321
1322 dl_list_for_each(bss, &wpa_s->bss, struct wpa_bss, list) {
1323 /* Skip other band bss */
1324 enum hostapd_hw_mode mode;
1325 mode = ieee80211_freq_to_chan(bss->freq, &channel);
1326 if (mode != HOSTAPD_MODE_IEEE80211G &&
1327 mode != HOSTAPD_MODE_IEEE80211B)
1328 continue;
1329
1330 ie = wpa_bss_get_ie(bss, WLAN_EID_HT_CAP);
1331 ht_cap = (ie && (ie[1] == 26)) ? WPA_GET_LE16(ie + 2) : 0;
1332 wpa_printf(MSG_DEBUG, "SME OBSS scan BSS " MACSTR
1333 " freq=%u chan=%u ht_cap=0x%x",
1334 MAC2STR(bss->bssid), bss->freq, channel, ht_cap);
1335
1336 if (!ht_cap || (ht_cap & HT_CAP_INFO_40MHZ_INTOLERANT)) {
1337 if (ht_cap & HT_CAP_INFO_40MHZ_INTOLERANT)
1338 num_intol++;
1339
1340 /* Check whether the channel is already considered */
1341 for (i = 0; i < num_channels; i++) {
1342 if (channel == chan_list[i])
1343 break;
1344 }
1345 if (i != num_channels)
1346 continue;
1347
1348 chan_list[num_channels++] = channel;
1349 }
1350 }
1351
1352 sme_send_2040_bss_coex(wpa_s, chan_list, num_channels, num_intol);
1353 return 1;
1354 }
1355
1356
wpa_obss_scan_freqs_list(struct wpa_supplicant * wpa_s,struct wpa_driver_scan_params * params)1357 static void wpa_obss_scan_freqs_list(struct wpa_supplicant *wpa_s,
1358 struct wpa_driver_scan_params *params)
1359 {
1360 /* Include only affected channels */
1361 struct hostapd_hw_modes *mode;
1362 int count, i;
1363 int start, end;
1364
1365 mode = get_mode(wpa_s->hw.modes, wpa_s->hw.num_modes,
1366 HOSTAPD_MODE_IEEE80211G);
1367 if (mode == NULL) {
1368 /* No channels supported in this band - use empty list */
1369 params->freqs = os_zalloc(sizeof(int));
1370 return;
1371 }
1372
1373 if (wpa_s->sme.ht_sec_chan == HT_SEC_CHAN_UNKNOWN &&
1374 wpa_s->current_bss) {
1375 const u8 *ie;
1376
1377 ie = wpa_bss_get_ie(wpa_s->current_bss, WLAN_EID_HT_OPERATION);
1378 if (ie && ie[1] >= 2) {
1379 u8 o;
1380
1381 o = ie[3] & HT_INFO_HT_PARAM_SECONDARY_CHNL_OFF_MASK;
1382 if (o == HT_INFO_HT_PARAM_SECONDARY_CHNL_ABOVE)
1383 wpa_s->sme.ht_sec_chan = HT_SEC_CHAN_ABOVE;
1384 else if (o == HT_INFO_HT_PARAM_SECONDARY_CHNL_BELOW)
1385 wpa_s->sme.ht_sec_chan = HT_SEC_CHAN_BELOW;
1386 }
1387 }
1388
1389 start = wpa_s->assoc_freq - 10;
1390 end = wpa_s->assoc_freq + 10;
1391 switch (wpa_s->sme.ht_sec_chan) {
1392 case HT_SEC_CHAN_UNKNOWN:
1393 /* HT40+ possible on channels 1..9 */
1394 if (wpa_s->assoc_freq <= 2452)
1395 start -= 20;
1396 /* HT40- possible on channels 5-13 */
1397 if (wpa_s->assoc_freq >= 2432)
1398 end += 20;
1399 break;
1400 case HT_SEC_CHAN_ABOVE:
1401 end += 20;
1402 break;
1403 case HT_SEC_CHAN_BELOW:
1404 start -= 20;
1405 break;
1406 }
1407 wpa_printf(MSG_DEBUG,
1408 "OBSS: assoc_freq %d possible affected range %d-%d",
1409 wpa_s->assoc_freq, start, end);
1410
1411 params->freqs = os_calloc(mode->num_channels + 1, sizeof(int));
1412 if (params->freqs == NULL)
1413 return;
1414 for (count = 0, i = 0; i < mode->num_channels; i++) {
1415 int freq;
1416
1417 if (mode->channels[i].flag & HOSTAPD_CHAN_DISABLED)
1418 continue;
1419 freq = mode->channels[i].freq;
1420 if (freq - 10 >= end || freq + 10 <= start)
1421 continue; /* not affected */
1422 params->freqs[count++] = freq;
1423 }
1424 }
1425
1426
sme_obss_scan_timeout(void * eloop_ctx,void * timeout_ctx)1427 static void sme_obss_scan_timeout(void *eloop_ctx, void *timeout_ctx)
1428 {
1429 struct wpa_supplicant *wpa_s = eloop_ctx;
1430 struct wpa_driver_scan_params params;
1431
1432 if (!wpa_s->current_bss) {
1433 wpa_printf(MSG_DEBUG, "SME OBSS: Ignore scan request");
1434 return;
1435 }
1436
1437 os_memset(¶ms, 0, sizeof(params));
1438 wpa_obss_scan_freqs_list(wpa_s, ¶ms);
1439 params.low_priority = 1;
1440 wpa_printf(MSG_DEBUG, "SME OBSS: Request an OBSS scan");
1441
1442 if (wpa_supplicant_trigger_scan(wpa_s, ¶ms))
1443 wpa_printf(MSG_DEBUG, "SME OBSS: Failed to trigger scan");
1444 else
1445 wpa_s->sme.sched_obss_scan = 1;
1446 os_free(params.freqs);
1447
1448 eloop_register_timeout(wpa_s->sme.obss_scan_int, 0,
1449 sme_obss_scan_timeout, wpa_s, NULL);
1450 }
1451
1452
sme_sched_obss_scan(struct wpa_supplicant * wpa_s,int enable)1453 void sme_sched_obss_scan(struct wpa_supplicant *wpa_s, int enable)
1454 {
1455 const u8 *ie;
1456 struct wpa_bss *bss = wpa_s->current_bss;
1457 struct wpa_ssid *ssid = wpa_s->current_ssid;
1458 struct hostapd_hw_modes *hw_mode = NULL;
1459 int i;
1460
1461 eloop_cancel_timeout(sme_obss_scan_timeout, wpa_s, NULL);
1462 wpa_s->sme.sched_obss_scan = 0;
1463 wpa_s->sme.ht_sec_chan = HT_SEC_CHAN_UNKNOWN;
1464 if (!enable)
1465 return;
1466
1467 /*
1468 * Schedule OBSS scan if driver is using station SME in wpa_supplicant
1469 * or it expects OBSS scan to be performed by wpa_supplicant.
1470 */
1471 if (!((wpa_s->drv_flags & WPA_DRIVER_FLAGS_SME) ||
1472 (wpa_s->drv_flags & WPA_DRIVER_FLAGS_OBSS_SCAN)) ||
1473 ssid == NULL || ssid->mode != IEEE80211_MODE_INFRA)
1474 return;
1475
1476 if (!wpa_s->hw.modes)
1477 return;
1478
1479 /* only HT caps in 11g mode are relevant */
1480 for (i = 0; i < wpa_s->hw.num_modes; i++) {
1481 hw_mode = &wpa_s->hw.modes[i];
1482 if (hw_mode->mode == HOSTAPD_MODE_IEEE80211G)
1483 break;
1484 }
1485
1486 /* Driver does not support HT40 for 11g or doesn't have 11g. */
1487 if (i == wpa_s->hw.num_modes || !hw_mode ||
1488 !(hw_mode->ht_capab & HT_CAP_INFO_SUPP_CHANNEL_WIDTH_SET))
1489 return;
1490
1491 if (bss == NULL || bss->freq < 2400 || bss->freq > 2500)
1492 return; /* Not associated on 2.4 GHz band */
1493
1494 /* Check whether AP supports HT40 */
1495 ie = wpa_bss_get_ie(wpa_s->current_bss, WLAN_EID_HT_CAP);
1496 if (!ie || ie[1] < 2 ||
1497 !(WPA_GET_LE16(ie + 2) & HT_CAP_INFO_SUPP_CHANNEL_WIDTH_SET))
1498 return; /* AP does not support HT40 */
1499
1500 ie = wpa_bss_get_ie(wpa_s->current_bss,
1501 WLAN_EID_OVERLAPPING_BSS_SCAN_PARAMS);
1502 if (!ie || ie[1] < 14)
1503 return; /* AP does not request OBSS scans */
1504
1505 wpa_s->sme.obss_scan_int = WPA_GET_LE16(ie + 6);
1506 if (wpa_s->sme.obss_scan_int < 10) {
1507 wpa_printf(MSG_DEBUG, "SME: Invalid OBSS Scan Interval %u "
1508 "replaced with the minimum 10 sec",
1509 wpa_s->sme.obss_scan_int);
1510 wpa_s->sme.obss_scan_int = 10;
1511 }
1512 wpa_printf(MSG_DEBUG, "SME: OBSS Scan Interval %u sec",
1513 wpa_s->sme.obss_scan_int);
1514 eloop_register_timeout(wpa_s->sme.obss_scan_int, 0,
1515 sme_obss_scan_timeout, wpa_s, NULL);
1516 }
1517
1518
1519 #ifdef CONFIG_IEEE80211W
1520
1521 static const unsigned int sa_query_max_timeout = 1000;
1522 static const unsigned int sa_query_retry_timeout = 201;
1523
sme_check_sa_query_timeout(struct wpa_supplicant * wpa_s)1524 static int sme_check_sa_query_timeout(struct wpa_supplicant *wpa_s)
1525 {
1526 u32 tu;
1527 struct os_reltime now, passed;
1528 os_get_reltime(&now);
1529 os_reltime_sub(&now, &wpa_s->sme.sa_query_start, &passed);
1530 tu = (passed.sec * 1000000 + passed.usec) / 1024;
1531 if (sa_query_max_timeout < tu) {
1532 wpa_dbg(wpa_s, MSG_DEBUG, "SME: SA Query timed out");
1533 sme_stop_sa_query(wpa_s);
1534 wpa_supplicant_deauthenticate(
1535 wpa_s, WLAN_REASON_PREV_AUTH_NOT_VALID);
1536 return 1;
1537 }
1538
1539 return 0;
1540 }
1541
1542
sme_send_sa_query_req(struct wpa_supplicant * wpa_s,const u8 * trans_id)1543 static void sme_send_sa_query_req(struct wpa_supplicant *wpa_s,
1544 const u8 *trans_id)
1545 {
1546 u8 req[2 + WLAN_SA_QUERY_TR_ID_LEN];
1547 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Sending SA Query Request to "
1548 MACSTR, MAC2STR(wpa_s->bssid));
1549 wpa_hexdump(MSG_DEBUG, "SME: SA Query Transaction ID",
1550 trans_id, WLAN_SA_QUERY_TR_ID_LEN);
1551 req[0] = WLAN_ACTION_SA_QUERY;
1552 req[1] = WLAN_SA_QUERY_REQUEST;
1553 os_memcpy(req + 2, trans_id, WLAN_SA_QUERY_TR_ID_LEN);
1554 if (wpa_drv_send_action(wpa_s, wpa_s->assoc_freq, 0, wpa_s->bssid,
1555 wpa_s->own_addr, wpa_s->bssid,
1556 req, sizeof(req), 0) < 0)
1557 wpa_msg(wpa_s, MSG_INFO, "SME: Failed to send SA Query "
1558 "Request");
1559 }
1560
1561
sme_sa_query_timer(void * eloop_ctx,void * timeout_ctx)1562 static void sme_sa_query_timer(void *eloop_ctx, void *timeout_ctx)
1563 {
1564 struct wpa_supplicant *wpa_s = eloop_ctx;
1565 unsigned int timeout, sec, usec;
1566 u8 *trans_id, *nbuf;
1567
1568 if (wpa_s->sme.sa_query_count > 0 &&
1569 sme_check_sa_query_timeout(wpa_s))
1570 return;
1571
1572 nbuf = os_realloc_array(wpa_s->sme.sa_query_trans_id,
1573 wpa_s->sme.sa_query_count + 1,
1574 WLAN_SA_QUERY_TR_ID_LEN);
1575 if (nbuf == NULL)
1576 return;
1577 if (wpa_s->sme.sa_query_count == 0) {
1578 /* Starting a new SA Query procedure */
1579 os_get_reltime(&wpa_s->sme.sa_query_start);
1580 }
1581 trans_id = nbuf + wpa_s->sme.sa_query_count * WLAN_SA_QUERY_TR_ID_LEN;
1582 wpa_s->sme.sa_query_trans_id = nbuf;
1583 wpa_s->sme.sa_query_count++;
1584
1585 if (os_get_random(trans_id, WLAN_SA_QUERY_TR_ID_LEN) < 0) {
1586 wpa_printf(MSG_DEBUG, "Could not generate SA Query ID");
1587 return;
1588 }
1589
1590 timeout = sa_query_retry_timeout;
1591 sec = ((timeout / 1000) * 1024) / 1000;
1592 usec = (timeout % 1000) * 1024;
1593 eloop_register_timeout(sec, usec, sme_sa_query_timer, wpa_s, NULL);
1594
1595 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Association SA Query attempt %d",
1596 wpa_s->sme.sa_query_count);
1597
1598 sme_send_sa_query_req(wpa_s, trans_id);
1599 }
1600
1601
sme_start_sa_query(struct wpa_supplicant * wpa_s)1602 static void sme_start_sa_query(struct wpa_supplicant *wpa_s)
1603 {
1604 sme_sa_query_timer(wpa_s, NULL);
1605 }
1606
1607
sme_stop_sa_query(struct wpa_supplicant * wpa_s)1608 static void sme_stop_sa_query(struct wpa_supplicant *wpa_s)
1609 {
1610 eloop_cancel_timeout(sme_sa_query_timer, wpa_s, NULL);
1611 os_free(wpa_s->sme.sa_query_trans_id);
1612 wpa_s->sme.sa_query_trans_id = NULL;
1613 wpa_s->sme.sa_query_count = 0;
1614 }
1615
1616
sme_event_unprot_disconnect(struct wpa_supplicant * wpa_s,const u8 * sa,const u8 * da,u16 reason_code)1617 void sme_event_unprot_disconnect(struct wpa_supplicant *wpa_s, const u8 *sa,
1618 const u8 *da, u16 reason_code)
1619 {
1620 struct wpa_ssid *ssid;
1621 struct os_reltime now;
1622
1623 if (wpa_s->wpa_state != WPA_COMPLETED)
1624 return;
1625 ssid = wpa_s->current_ssid;
1626 if (wpas_get_ssid_pmf(wpa_s, ssid) == NO_MGMT_FRAME_PROTECTION)
1627 return;
1628 if (os_memcmp(sa, wpa_s->bssid, ETH_ALEN) != 0)
1629 return;
1630 if (reason_code != WLAN_REASON_CLASS2_FRAME_FROM_NONAUTH_STA &&
1631 reason_code != WLAN_REASON_CLASS3_FRAME_FROM_NONASSOC_STA)
1632 return;
1633 if (wpa_s->sme.sa_query_count > 0)
1634 return;
1635
1636 os_get_reltime(&now);
1637 if (wpa_s->sme.last_unprot_disconnect.sec &&
1638 !os_reltime_expired(&now, &wpa_s->sme.last_unprot_disconnect, 10))
1639 return; /* limit SA Query procedure frequency */
1640 wpa_s->sme.last_unprot_disconnect = now;
1641
1642 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Unprotected disconnect dropped - "
1643 "possible AP/STA state mismatch - trigger SA Query");
1644 sme_start_sa_query(wpa_s);
1645 }
1646
1647
sme_sa_query_rx(struct wpa_supplicant * wpa_s,const u8 * sa,const u8 * data,size_t len)1648 void sme_sa_query_rx(struct wpa_supplicant *wpa_s, const u8 *sa,
1649 const u8 *data, size_t len)
1650 {
1651 int i;
1652
1653 if (wpa_s->sme.sa_query_trans_id == NULL ||
1654 len < 1 + WLAN_SA_QUERY_TR_ID_LEN ||
1655 data[0] != WLAN_SA_QUERY_RESPONSE)
1656 return;
1657 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Received SA Query response from "
1658 MACSTR " (trans_id %02x%02x)", MAC2STR(sa), data[1], data[2]);
1659
1660 if (os_memcmp(sa, wpa_s->bssid, ETH_ALEN) != 0)
1661 return;
1662
1663 for (i = 0; i < wpa_s->sme.sa_query_count; i++) {
1664 if (os_memcmp(wpa_s->sme.sa_query_trans_id +
1665 i * WLAN_SA_QUERY_TR_ID_LEN,
1666 data + 1, WLAN_SA_QUERY_TR_ID_LEN) == 0)
1667 break;
1668 }
1669
1670 if (i >= wpa_s->sme.sa_query_count) {
1671 wpa_dbg(wpa_s, MSG_DEBUG, "SME: No matching SA Query "
1672 "transaction identifier found");
1673 return;
1674 }
1675
1676 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Reply to pending SA Query received "
1677 "from " MACSTR, MAC2STR(sa));
1678 sme_stop_sa_query(wpa_s);
1679 }
1680
1681 #endif /* CONFIG_IEEE80211W */
1682