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 "common/ocv.h"
16 #include "eapol_supp/eapol_supp_sm.h"
17 #include "common/wpa_common.h"
18 #include "common/sae.h"
19 #include "common/dpp.h"
20 #include "rsn_supp/wpa.h"
21 #include "rsn_supp/pmksa_cache.h"
22 #include "config.h"
23 #include "wpa_supplicant_i.h"
24 #include "driver_i.h"
25 #include "wpas_glue.h"
26 #include "wps_supplicant.h"
27 #include "p2p_supplicant.h"
28 #include "notify.h"
29 #include "bss.h"
30 #include "scan.h"
31 #include "sme.h"
32 #include "hs20_supplicant.h"
33
34 #define SME_AUTH_TIMEOUT 5
35 #define SME_ASSOC_TIMEOUT 5
36
37 static void sme_auth_timer(void *eloop_ctx, void *timeout_ctx);
38 static void sme_assoc_timer(void *eloop_ctx, void *timeout_ctx);
39 static void sme_obss_scan_timeout(void *eloop_ctx, void *timeout_ctx);
40 static void sme_stop_sa_query(struct wpa_supplicant *wpa_s);
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, 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,int external,int reuse,int * ret_use_pt,bool * ret_use_pk)84 static struct wpabuf * sme_auth_build_sae_commit(struct wpa_supplicant *wpa_s,
85 struct wpa_ssid *ssid,
86 const u8 *bssid, int external,
87 int reuse, int *ret_use_pt,
88 bool *ret_use_pk)
89 {
90 struct wpabuf *buf;
91 size_t len;
92 const char *password;
93 struct wpa_bss *bss;
94 int use_pt = 0;
95 bool use_pk = false;
96 u8 rsnxe_capa = 0;
97
98 if (ret_use_pt)
99 *ret_use_pt = 0;
100 if (ret_use_pk)
101 *ret_use_pk = false;
102
103 #ifdef CONFIG_TESTING_OPTIONS
104 if (wpa_s->sae_commit_override) {
105 wpa_printf(MSG_DEBUG, "SAE: TESTING - commit override");
106 buf = wpabuf_alloc(4 + wpabuf_len(wpa_s->sae_commit_override));
107 if (!buf)
108 return NULL;
109 if (!external) {
110 wpabuf_put_le16(buf, 1); /* Transaction seq# */
111 wpabuf_put_le16(buf, WLAN_STATUS_SUCCESS);
112 }
113 wpabuf_put_buf(buf, wpa_s->sae_commit_override);
114 return buf;
115 }
116 #endif /* CONFIG_TESTING_OPTIONS */
117
118 password = ssid->sae_password;
119 if (!password)
120 password = ssid->passphrase;
121 if (!password) {
122 wpa_printf(MSG_DEBUG, "SAE: No password available");
123 return NULL;
124 }
125
126 if (reuse && wpa_s->sme.sae.tmp &&
127 os_memcmp(bssid, wpa_s->sme.sae.tmp->bssid, ETH_ALEN) == 0) {
128 wpa_printf(MSG_DEBUG,
129 "SAE: Reuse previously generated PWE on a retry with the same AP");
130 use_pt = wpa_s->sme.sae.h2e;
131 use_pk = wpa_s->sme.sae.pk;
132 goto reuse_data;
133 }
134 if (sme_set_sae_group(wpa_s) < 0) {
135 wpa_printf(MSG_DEBUG, "SAE: Failed to select group");
136 return NULL;
137 }
138
139 bss = wpa_bss_get_bssid_latest(wpa_s, bssid);
140 if (!bss) {
141 wpa_printf(MSG_DEBUG,
142 "SAE: BSS not available, update scan result to get BSS");
143 wpa_supplicant_update_scan_results(wpa_s);
144 bss = wpa_bss_get_bssid_latest(wpa_s, bssid);
145 }
146 if (bss) {
147 const u8 *rsnxe;
148
149 rsnxe = wpa_bss_get_ie(bss, WLAN_EID_RSNX);
150 if (rsnxe && rsnxe[1] >= 1)
151 rsnxe_capa = rsnxe[2];
152 }
153
154 if (ssid->sae_password_id && wpa_s->conf->sae_pwe != 3)
155 use_pt = 1;
156 #ifdef CONFIG_SAE_PK
157 if ((rsnxe_capa & BIT(WLAN_RSNX_CAPAB_SAE_PK)) &&
158 ssid->sae_pk != SAE_PK_MODE_DISABLED &&
159 ((ssid->sae_password &&
160 sae_pk_valid_password(ssid->sae_password)) ||
161 (!ssid->sae_password && ssid->passphrase &&
162 sae_pk_valid_password(ssid->passphrase)))) {
163 use_pt = 1;
164 use_pk = true;
165 }
166
167 if (ssid->sae_pk == SAE_PK_MODE_ONLY && !use_pk) {
168 wpa_printf(MSG_DEBUG,
169 "SAE: Cannot use PK with the selected AP");
170 return NULL;
171 }
172 #endif /* CONFIG_SAE_PK */
173
174 if (use_pt || wpa_s->conf->sae_pwe == 1 || wpa_s->conf->sae_pwe == 2) {
175 use_pt = !!(rsnxe_capa & BIT(WLAN_RSNX_CAPAB_SAE_H2E));
176
177 if ((wpa_s->conf->sae_pwe == 1 || ssid->sae_password_id) &&
178 wpa_s->conf->sae_pwe != 3 &&
179 !use_pt) {
180 wpa_printf(MSG_DEBUG,
181 "SAE: Cannot use H2E with the selected AP");
182 return NULL;
183 }
184 }
185
186 if (use_pt &&
187 sae_prepare_commit_pt(&wpa_s->sme.sae, ssid->pt,
188 wpa_s->own_addr, bssid,
189 wpa_s->sme.sae_rejected_groups, NULL) < 0)
190 return NULL;
191 if (!use_pt &&
192 sae_prepare_commit(wpa_s->own_addr, bssid,
193 (u8 *) password, os_strlen(password),
194 &wpa_s->sme.sae) < 0) {
195 wpa_printf(MSG_DEBUG, "SAE: Could not pick PWE");
196 return NULL;
197 }
198 if (wpa_s->sme.sae.tmp) {
199 os_memcpy(wpa_s->sme.sae.tmp->bssid, bssid, ETH_ALEN);
200 if (use_pt && use_pk)
201 wpa_s->sme.sae.pk = 1;
202 #ifdef CONFIG_SAE_PK
203 os_memcpy(wpa_s->sme.sae.tmp->own_addr, wpa_s->own_addr,
204 ETH_ALEN);
205 os_memcpy(wpa_s->sme.sae.tmp->peer_addr, bssid, ETH_ALEN);
206 sae_pk_set_password(&wpa_s->sme.sae, password);
207 #endif /* CONFIG_SAE_PK */
208 }
209
210 reuse_data:
211 len = wpa_s->sme.sae_token ? 3 + wpabuf_len(wpa_s->sme.sae_token) : 0;
212 if (ssid->sae_password_id)
213 len += 4 + os_strlen(ssid->sae_password_id);
214 buf = wpabuf_alloc(4 + SAE_COMMIT_MAX_LEN + len);
215 if (buf == NULL)
216 return NULL;
217 if (!external) {
218 wpabuf_put_le16(buf, 1); /* Transaction seq# */
219 if (use_pk)
220 wpabuf_put_le16(buf, WLAN_STATUS_SAE_PK);
221 else if (use_pt)
222 wpabuf_put_le16(buf, WLAN_STATUS_SAE_HASH_TO_ELEMENT);
223 else
224 wpabuf_put_le16(buf,WLAN_STATUS_SUCCESS);
225 }
226 if (sae_write_commit(&wpa_s->sme.sae, buf, wpa_s->sme.sae_token,
227 ssid->sae_password_id) < 0) {
228 wpabuf_free(buf);
229 return NULL;
230 }
231 if (ret_use_pt)
232 *ret_use_pt = use_pt;
233 if (ret_use_pk)
234 *ret_use_pk = use_pk;
235
236 return buf;
237 }
238
239
sme_auth_build_sae_confirm(struct wpa_supplicant * wpa_s,int external)240 static struct wpabuf * sme_auth_build_sae_confirm(struct wpa_supplicant *wpa_s,
241 int external)
242 {
243 struct wpabuf *buf;
244
245 buf = wpabuf_alloc(4 + SAE_CONFIRM_MAX_LEN);
246 if (buf == NULL)
247 return NULL;
248
249 if (!external) {
250 wpabuf_put_le16(buf, 2); /* Transaction seq# */
251 wpabuf_put_le16(buf, WLAN_STATUS_SUCCESS);
252 }
253 sae_write_confirm(&wpa_s->sme.sae, buf);
254
255 return buf;
256 }
257
258 #endif /* CONFIG_SAE */
259
260
261 /**
262 * sme_auth_handle_rrm - Handle RRM aspects of current authentication attempt
263 * @wpa_s: Pointer to wpa_supplicant data
264 * @bss: Pointer to the bss which is the target of authentication attempt
265 */
sme_auth_handle_rrm(struct wpa_supplicant * wpa_s,struct wpa_bss * bss)266 static void sme_auth_handle_rrm(struct wpa_supplicant *wpa_s,
267 struct wpa_bss *bss)
268 {
269 const u8 rrm_ie_len = 5;
270 u8 *pos;
271 const u8 *rrm_ie;
272
273 wpa_s->rrm.rrm_used = 0;
274
275 wpa_printf(MSG_DEBUG,
276 "RRM: Determining whether RRM can be used - device support: 0x%x",
277 wpa_s->drv_rrm_flags);
278
279 rrm_ie = wpa_bss_get_ie(bss, WLAN_EID_RRM_ENABLED_CAPABILITIES);
280 if (!rrm_ie || !(bss->caps & IEEE80211_CAP_RRM)) {
281 wpa_printf(MSG_DEBUG, "RRM: No RRM in network");
282 return;
283 }
284
285 if (!((wpa_s->drv_rrm_flags &
286 WPA_DRIVER_FLAGS_DS_PARAM_SET_IE_IN_PROBES) &&
287 (wpa_s->drv_rrm_flags & WPA_DRIVER_FLAGS_QUIET)) &&
288 !(wpa_s->drv_rrm_flags & WPA_DRIVER_FLAGS_SUPPORT_RRM)) {
289 wpa_printf(MSG_DEBUG,
290 "RRM: Insufficient RRM support in driver - do not use RRM");
291 return;
292 }
293
294 if (sizeof(wpa_s->sme.assoc_req_ie) <
295 wpa_s->sme.assoc_req_ie_len + rrm_ie_len + 2) {
296 wpa_printf(MSG_INFO,
297 "RRM: Unable to use RRM, no room for RRM IE");
298 return;
299 }
300
301 wpa_printf(MSG_DEBUG, "RRM: Adding RRM IE to Association Request");
302 pos = wpa_s->sme.assoc_req_ie + wpa_s->sme.assoc_req_ie_len;
303 os_memset(pos, 0, 2 + rrm_ie_len);
304 *pos++ = WLAN_EID_RRM_ENABLED_CAPABILITIES;
305 *pos++ = rrm_ie_len;
306
307 /* Set supported capabilities flags */
308 if (wpa_s->drv_rrm_flags & WPA_DRIVER_FLAGS_TX_POWER_INSERTION)
309 *pos |= WLAN_RRM_CAPS_LINK_MEASUREMENT;
310
311 *pos |= WLAN_RRM_CAPS_BEACON_REPORT_PASSIVE |
312 WLAN_RRM_CAPS_BEACON_REPORT_ACTIVE |
313 WLAN_RRM_CAPS_BEACON_REPORT_TABLE;
314
315 if (wpa_s->lci)
316 pos[1] |= WLAN_RRM_CAPS_LCI_MEASUREMENT;
317
318 wpa_s->sme.assoc_req_ie_len += rrm_ie_len + 2;
319 wpa_s->rrm.rrm_used = 1;
320 }
321
322
sme_send_authentication(struct wpa_supplicant * wpa_s,struct wpa_bss * bss,struct wpa_ssid * ssid,int start)323 static void sme_send_authentication(struct wpa_supplicant *wpa_s,
324 struct wpa_bss *bss, struct wpa_ssid *ssid,
325 int start)
326 {
327 struct wpa_driver_auth_params params;
328 struct wpa_ssid *old_ssid;
329 #ifdef CONFIG_IEEE80211R
330 const u8 *ie;
331 #endif /* CONFIG_IEEE80211R */
332 #if defined(CONFIG_IEEE80211R) || defined(CONFIG_FILS)
333 const u8 *md = NULL;
334 #endif /* CONFIG_IEEE80211R || CONFIG_FILS */
335 int bssid_changed;
336 struct wpabuf *resp = NULL;
337 u8 ext_capab[18];
338 int ext_capab_len;
339 int skip_auth;
340 u8 *wpa_ie;
341 size_t wpa_ie_len;
342 #ifdef CONFIG_MBO
343 const u8 *mbo_ie;
344 #endif /* CONFIG_MBO */
345 int omit_rsnxe = 0;
346
347 if (bss == NULL) {
348 wpa_msg(wpa_s, MSG_ERROR, "SME: No scan result available for "
349 "the network");
350 wpas_connect_work_done(wpa_s);
351 return;
352 }
353
354 skip_auth = wpa_s->conf->reassoc_same_bss_optim &&
355 wpa_s->reassoc_same_bss;
356 wpa_s->current_bss = bss;
357
358 os_memset(¶ms, 0, sizeof(params));
359 wpa_s->reassociate = 0;
360
361 params.freq = bss->freq;
362 params.bssid = bss->bssid;
363 params.ssid = bss->ssid;
364 params.ssid_len = bss->ssid_len;
365 params.p2p = ssid->p2p_group;
366
367 if (wpa_s->sme.ssid_len != params.ssid_len ||
368 os_memcmp(wpa_s->sme.ssid, params.ssid, params.ssid_len) != 0)
369 wpa_s->sme.prev_bssid_set = 0;
370
371 wpa_s->sme.freq = params.freq;
372 os_memcpy(wpa_s->sme.ssid, params.ssid, params.ssid_len);
373 wpa_s->sme.ssid_len = params.ssid_len;
374
375 params.auth_alg = WPA_AUTH_ALG_OPEN;
376 #ifdef IEEE8021X_EAPOL
377 if (ssid->key_mgmt & WPA_KEY_MGMT_IEEE8021X_NO_WPA) {
378 if (ssid->leap) {
379 if (ssid->non_leap == 0)
380 params.auth_alg = WPA_AUTH_ALG_LEAP;
381 else
382 params.auth_alg |= WPA_AUTH_ALG_LEAP;
383 }
384 }
385 #endif /* IEEE8021X_EAPOL */
386 wpa_dbg(wpa_s, MSG_DEBUG, "Automatic auth_alg selection: 0x%x",
387 params.auth_alg);
388 if (ssid->auth_alg) {
389 params.auth_alg = ssid->auth_alg;
390 wpa_dbg(wpa_s, MSG_DEBUG, "Overriding auth_alg selection: "
391 "0x%x", params.auth_alg);
392 }
393 #ifdef CONFIG_SAE
394 wpa_s->sme.sae_pmksa_caching = 0;
395 if (wpa_key_mgmt_sae(ssid->key_mgmt)) {
396 const u8 *rsn;
397 struct wpa_ie_data ied;
398
399 rsn = wpa_bss_get_ie(bss, WLAN_EID_RSN);
400 if (!rsn) {
401 wpa_dbg(wpa_s, MSG_DEBUG,
402 "SAE enabled, but target BSS does not advertise RSN");
403 #ifdef CONFIG_DPP
404 } else if (wpa_parse_wpa_ie(rsn, 2 + rsn[1], &ied) == 0 &&
405 (ssid->key_mgmt & WPA_KEY_MGMT_DPP) &&
406 (ied.key_mgmt & WPA_KEY_MGMT_DPP)) {
407 wpa_dbg(wpa_s, MSG_DEBUG, "Prefer DPP over SAE when both are enabled");
408 #endif /* CONFIG_DPP */
409 } else if (wpa_parse_wpa_ie(rsn, 2 + rsn[1], &ied) == 0 &&
410 wpa_key_mgmt_sae(ied.key_mgmt)) {
411 wpa_dbg(wpa_s, MSG_DEBUG, "Using SAE auth_alg");
412 params.auth_alg = WPA_AUTH_ALG_SAE;
413 } else {
414 wpa_dbg(wpa_s, MSG_DEBUG,
415 "SAE enabled, but target BSS does not advertise SAE AKM for RSN");
416 }
417 }
418 #endif /* CONFIG_SAE */
419
420 #ifdef CONFIG_WEP
421 {
422 int i;
423
424 for (i = 0; i < NUM_WEP_KEYS; i++) {
425 if (ssid->wep_key_len[i])
426 params.wep_key[i] = ssid->wep_key[i];
427 params.wep_key_len[i] = ssid->wep_key_len[i];
428 }
429 params.wep_tx_keyidx = ssid->wep_tx_keyidx;
430 }
431 #endif /* CONFIG_WEP */
432
433 if ((wpa_bss_get_vendor_ie(bss, WPA_IE_VENDOR_TYPE) ||
434 wpa_bss_get_ie(bss, WLAN_EID_RSN)) &&
435 wpa_key_mgmt_wpa(ssid->key_mgmt)) {
436 int try_opportunistic;
437 const u8 *cache_id = NULL;
438
439 try_opportunistic = (ssid->proactive_key_caching < 0 ?
440 wpa_s->conf->okc :
441 ssid->proactive_key_caching) &&
442 (ssid->proto & WPA_PROTO_RSN);
443 #ifdef CONFIG_FILS
444 if (wpa_key_mgmt_fils(ssid->key_mgmt))
445 cache_id = wpa_bss_get_fils_cache_id(bss);
446 #endif /* CONFIG_FILS */
447 if (pmksa_cache_set_current(wpa_s->wpa, NULL, bss->bssid,
448 wpa_s->current_ssid,
449 try_opportunistic, cache_id,
450 0) == 0)
451 eapol_sm_notify_pmkid_attempt(wpa_s->eapol);
452 wpa_s->sme.assoc_req_ie_len = sizeof(wpa_s->sme.assoc_req_ie);
453 if (wpa_supplicant_set_suites(wpa_s, bss, ssid,
454 wpa_s->sme.assoc_req_ie,
455 &wpa_s->sme.assoc_req_ie_len)) {
456 wpa_msg(wpa_s, MSG_WARNING, "SME: Failed to set WPA "
457 "key management and encryption suites");
458 wpas_connect_work_done(wpa_s);
459 return;
460 }
461 #ifdef CONFIG_HS20
462 } else if (wpa_bss_get_vendor_ie(bss, OSEN_IE_VENDOR_TYPE) &&
463 (ssid->key_mgmt & WPA_KEY_MGMT_OSEN)) {
464 /* No PMKSA caching, but otherwise similar to RSN/WPA */
465 wpa_s->sme.assoc_req_ie_len = sizeof(wpa_s->sme.assoc_req_ie);
466 if (wpa_supplicant_set_suites(wpa_s, bss, ssid,
467 wpa_s->sme.assoc_req_ie,
468 &wpa_s->sme.assoc_req_ie_len)) {
469 wpa_msg(wpa_s, MSG_WARNING, "SME: Failed to set WPA "
470 "key management and encryption suites");
471 wpas_connect_work_done(wpa_s);
472 return;
473 }
474 #endif /* CONFIG_HS20 */
475 } else if ((ssid->key_mgmt & WPA_KEY_MGMT_IEEE8021X_NO_WPA) &&
476 wpa_key_mgmt_wpa_ieee8021x(ssid->key_mgmt)) {
477 /*
478 * Both WPA and non-WPA IEEE 802.1X enabled in configuration -
479 * use non-WPA since the scan results did not indicate that the
480 * AP is using WPA or WPA2.
481 */
482 wpa_supplicant_set_non_wpa_policy(wpa_s, ssid);
483 wpa_s->sme.assoc_req_ie_len = 0;
484 } else if (wpa_key_mgmt_wpa_any(ssid->key_mgmt)) {
485 wpa_s->sme.assoc_req_ie_len = sizeof(wpa_s->sme.assoc_req_ie);
486 if (wpa_supplicant_set_suites(wpa_s, NULL, ssid,
487 wpa_s->sme.assoc_req_ie,
488 &wpa_s->sme.assoc_req_ie_len)) {
489 wpa_msg(wpa_s, MSG_WARNING, "SME: Failed to set WPA "
490 "key management and encryption suites (no "
491 "scan results)");
492 wpas_connect_work_done(wpa_s);
493 return;
494 }
495 #ifdef CONFIG_WPS
496 } else if (ssid->key_mgmt & WPA_KEY_MGMT_WPS) {
497 struct wpabuf *wps_ie;
498 wps_ie = wps_build_assoc_req_ie(wpas_wps_get_req_type(ssid));
499 if (wps_ie && wpabuf_len(wps_ie) <=
500 sizeof(wpa_s->sme.assoc_req_ie)) {
501 wpa_s->sme.assoc_req_ie_len = wpabuf_len(wps_ie);
502 os_memcpy(wpa_s->sme.assoc_req_ie, wpabuf_head(wps_ie),
503 wpa_s->sme.assoc_req_ie_len);
504 } else
505 wpa_s->sme.assoc_req_ie_len = 0;
506 wpabuf_free(wps_ie);
507 wpa_supplicant_set_non_wpa_policy(wpa_s, ssid);
508 #endif /* CONFIG_WPS */
509 } else {
510 wpa_supplicant_set_non_wpa_policy(wpa_s, ssid);
511 wpa_s->sme.assoc_req_ie_len = 0;
512 }
513
514 /* In case the WPA vendor IE is used, it should be placed after all the
515 * non-vendor IEs, as the lower layer expects the IEs to be ordered as
516 * defined in the standard. Store the WPA IE so it can later be
517 * inserted at the correct location.
518 */
519 wpa_ie = NULL;
520 wpa_ie_len = 0;
521 if (wpa_s->wpa_proto == WPA_PROTO_WPA) {
522 wpa_ie = os_memdup(wpa_s->sme.assoc_req_ie,
523 wpa_s->sme.assoc_req_ie_len);
524 if (wpa_ie) {
525 wpa_dbg(wpa_s, MSG_DEBUG, "WPA: Storing WPA IE");
526
527 wpa_ie_len = wpa_s->sme.assoc_req_ie_len;
528 wpa_s->sme.assoc_req_ie_len = 0;
529 } else {
530 wpa_msg(wpa_s, MSG_WARNING, "WPA: Failed copy WPA IE");
531 wpas_connect_work_done(wpa_s);
532 return;
533 }
534 }
535
536 #ifdef CONFIG_IEEE80211R
537 ie = wpa_bss_get_ie(bss, WLAN_EID_MOBILITY_DOMAIN);
538 if (ie && ie[1] >= MOBILITY_DOMAIN_ID_LEN)
539 md = ie + 2;
540 wpa_sm_set_ft_params(wpa_s->wpa, ie, ie ? 2 + ie[1] : 0);
541 if (md && (!wpa_key_mgmt_ft(ssid->key_mgmt) ||
542 !wpa_key_mgmt_ft(wpa_s->key_mgmt)))
543 md = NULL;
544 if (md) {
545 /* Prepare for the next transition */
546 wpa_ft_prepare_auth_request(wpa_s->wpa, ie);
547 }
548
549 if (md) {
550 wpa_dbg(wpa_s, MSG_DEBUG, "SME: FT mobility domain %02x%02x",
551 md[0], md[1]);
552
553 omit_rsnxe = !wpa_bss_get_ie(bss, WLAN_EID_RSNX);
554 if (wpa_s->sme.assoc_req_ie_len + 5 <
555 sizeof(wpa_s->sme.assoc_req_ie)) {
556 struct rsn_mdie *mdie;
557 u8 *pos = wpa_s->sme.assoc_req_ie +
558 wpa_s->sme.assoc_req_ie_len;
559 *pos++ = WLAN_EID_MOBILITY_DOMAIN;
560 *pos++ = sizeof(*mdie);
561 mdie = (struct rsn_mdie *) pos;
562 os_memcpy(mdie->mobility_domain, md,
563 MOBILITY_DOMAIN_ID_LEN);
564 mdie->ft_capab = md[MOBILITY_DOMAIN_ID_LEN];
565 wpa_s->sme.assoc_req_ie_len += 5;
566 }
567
568 if (wpa_s->sme.prev_bssid_set && wpa_s->sme.ft_used &&
569 os_memcmp(md, wpa_s->sme.mobility_domain, 2) == 0 &&
570 wpa_sm_has_ptk(wpa_s->wpa)) {
571 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Trying to use FT "
572 "over-the-air");
573 params.auth_alg = WPA_AUTH_ALG_FT;
574 params.ie = wpa_s->sme.ft_ies;
575 params.ie_len = wpa_s->sme.ft_ies_len;
576 }
577 }
578 #endif /* CONFIG_IEEE80211R */
579
580 wpa_s->sme.mfp = wpas_get_ssid_pmf(wpa_s, ssid);
581 if (wpa_s->sme.mfp != NO_MGMT_FRAME_PROTECTION) {
582 const u8 *rsn = wpa_bss_get_ie(bss, WLAN_EID_RSN);
583 struct wpa_ie_data _ie;
584 if (rsn && wpa_parse_wpa_ie(rsn, 2 + rsn[1], &_ie) == 0 &&
585 _ie.capabilities &
586 (WPA_CAPABILITY_MFPC | WPA_CAPABILITY_MFPR)) {
587 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Selected AP supports "
588 "MFP: require MFP");
589 wpa_s->sme.mfp = MGMT_FRAME_PROTECTION_REQUIRED;
590 }
591 }
592
593 #ifdef CONFIG_P2P
594 if (wpa_s->global->p2p) {
595 u8 *pos;
596 size_t len;
597 int res;
598 pos = wpa_s->sme.assoc_req_ie + wpa_s->sme.assoc_req_ie_len;
599 len = sizeof(wpa_s->sme.assoc_req_ie) -
600 wpa_s->sme.assoc_req_ie_len;
601 res = wpas_p2p_assoc_req_ie(wpa_s, bss, pos, len,
602 ssid->p2p_group);
603 if (res >= 0)
604 wpa_s->sme.assoc_req_ie_len += res;
605 }
606 #endif /* CONFIG_P2P */
607
608 #ifdef CONFIG_FST
609 if (wpa_s->fst_ies) {
610 int fst_ies_len = wpabuf_len(wpa_s->fst_ies);
611
612 if (wpa_s->sme.assoc_req_ie_len + fst_ies_len <=
613 sizeof(wpa_s->sme.assoc_req_ie)) {
614 os_memcpy(wpa_s->sme.assoc_req_ie +
615 wpa_s->sme.assoc_req_ie_len,
616 wpabuf_head(wpa_s->fst_ies),
617 fst_ies_len);
618 wpa_s->sme.assoc_req_ie_len += fst_ies_len;
619 }
620 }
621 #endif /* CONFIG_FST */
622
623 sme_auth_handle_rrm(wpa_s, bss);
624
625 wpa_s->sme.assoc_req_ie_len += wpas_supp_op_class_ie(
626 wpa_s, ssid, bss,
627 wpa_s->sme.assoc_req_ie + wpa_s->sme.assoc_req_ie_len,
628 sizeof(wpa_s->sme.assoc_req_ie) - wpa_s->sme.assoc_req_ie_len);
629
630 if (params.p2p)
631 wpa_drv_get_ext_capa(wpa_s, WPA_IF_P2P_CLIENT);
632 else
633 wpa_drv_get_ext_capa(wpa_s, WPA_IF_STATION);
634
635 ext_capab_len = wpas_build_ext_capab(wpa_s, ext_capab,
636 sizeof(ext_capab));
637 if (ext_capab_len > 0) {
638 u8 *pos = wpa_s->sme.assoc_req_ie;
639 if (wpa_s->sme.assoc_req_ie_len > 0 && pos[0] == WLAN_EID_RSN)
640 pos += 2 + pos[1];
641 os_memmove(pos + ext_capab_len, pos,
642 wpa_s->sme.assoc_req_ie_len -
643 (pos - wpa_s->sme.assoc_req_ie));
644 wpa_s->sme.assoc_req_ie_len += ext_capab_len;
645 os_memcpy(pos, ext_capab, ext_capab_len);
646 }
647
648 #ifdef CONFIG_TESTING_OPTIONS
649 if (wpa_s->rsnxe_override_assoc &&
650 wpabuf_len(wpa_s->rsnxe_override_assoc) <=
651 sizeof(wpa_s->sme.assoc_req_ie) - wpa_s->sme.assoc_req_ie_len) {
652 wpa_printf(MSG_DEBUG, "TESTING: RSNXE AssocReq override");
653 os_memcpy(wpa_s->sme.assoc_req_ie + wpa_s->sme.assoc_req_ie_len,
654 wpabuf_head(wpa_s->rsnxe_override_assoc),
655 wpabuf_len(wpa_s->rsnxe_override_assoc));
656 wpa_s->sme.assoc_req_ie_len +=
657 wpabuf_len(wpa_s->rsnxe_override_assoc);
658 } else
659 #endif /* CONFIG_TESTING_OPTIONS */
660 if (wpa_s->rsnxe_len > 0 &&
661 wpa_s->rsnxe_len <=
662 sizeof(wpa_s->sme.assoc_req_ie) - wpa_s->sme.assoc_req_ie_len &&
663 !omit_rsnxe) {
664 os_memcpy(wpa_s->sme.assoc_req_ie + wpa_s->sme.assoc_req_ie_len,
665 wpa_s->rsnxe, wpa_s->rsnxe_len);
666 wpa_s->sme.assoc_req_ie_len += wpa_s->rsnxe_len;
667 }
668
669 #ifdef CONFIG_HS20
670 if (is_hs20_network(wpa_s, ssid, bss)
671 #ifndef ANDROID /* Android does not use the native HS 2.0 config */
672 && is_hs20_config(wpa_s)
673 #endif /* ANDROID */
674 ) {
675 struct wpabuf *hs20;
676
677 hs20 = wpabuf_alloc(20 + MAX_ROAMING_CONS_OI_LEN);
678 if (hs20) {
679 int pps_mo_id = hs20_get_pps_mo_id(wpa_s, ssid);
680 size_t len;
681
682 wpas_hs20_add_indication(hs20, pps_mo_id,
683 get_hs20_version(bss));
684 wpas_hs20_add_roam_cons_sel(hs20, ssid);
685 len = sizeof(wpa_s->sme.assoc_req_ie) -
686 wpa_s->sme.assoc_req_ie_len;
687 if (wpabuf_len(hs20) <= len) {
688 os_memcpy(wpa_s->sme.assoc_req_ie +
689 wpa_s->sme.assoc_req_ie_len,
690 wpabuf_head(hs20), wpabuf_len(hs20));
691 wpa_s->sme.assoc_req_ie_len += wpabuf_len(hs20);
692 }
693 wpabuf_free(hs20);
694 }
695 }
696 #endif /* CONFIG_HS20 */
697
698 if (wpa_ie) {
699 size_t len;
700
701 wpa_dbg(wpa_s, MSG_DEBUG, "WPA: Reinsert WPA IE");
702
703 len = sizeof(wpa_s->sme.assoc_req_ie) -
704 wpa_s->sme.assoc_req_ie_len;
705
706 if (len > wpa_ie_len) {
707 os_memcpy(wpa_s->sme.assoc_req_ie +
708 wpa_s->sme.assoc_req_ie_len,
709 wpa_ie, wpa_ie_len);
710 wpa_s->sme.assoc_req_ie_len += wpa_ie_len;
711 } else {
712 wpa_dbg(wpa_s, MSG_DEBUG, "WPA: Failed to add WPA IE");
713 }
714
715 os_free(wpa_ie);
716 }
717
718 if (wpa_s->vendor_elem[VENDOR_ELEM_ASSOC_REQ]) {
719 struct wpabuf *buf = wpa_s->vendor_elem[VENDOR_ELEM_ASSOC_REQ];
720 size_t len;
721
722 len = sizeof(wpa_s->sme.assoc_req_ie) -
723 wpa_s->sme.assoc_req_ie_len;
724 if (wpabuf_len(buf) <= len) {
725 os_memcpy(wpa_s->sme.assoc_req_ie +
726 wpa_s->sme.assoc_req_ie_len,
727 wpabuf_head(buf), wpabuf_len(buf));
728 wpa_s->sme.assoc_req_ie_len += wpabuf_len(buf);
729 }
730 }
731
732 #ifdef CONFIG_MBO
733 mbo_ie = wpa_bss_get_vendor_ie(bss, MBO_IE_VENDOR_TYPE);
734 if (!wpa_s->disable_mbo_oce && mbo_ie) {
735 int len;
736
737 len = wpas_mbo_ie(wpa_s, wpa_s->sme.assoc_req_ie +
738 wpa_s->sme.assoc_req_ie_len,
739 sizeof(wpa_s->sme.assoc_req_ie) -
740 wpa_s->sme.assoc_req_ie_len,
741 !!mbo_attr_from_mbo_ie(mbo_ie,
742 OCE_ATTR_ID_CAPA_IND));
743 if (len >= 0)
744 wpa_s->sme.assoc_req_ie_len += len;
745 }
746 #endif /* CONFIG_MBO */
747
748 #ifdef CONFIG_SAE
749 if (!skip_auth && params.auth_alg == WPA_AUTH_ALG_SAE &&
750 pmksa_cache_set_current(wpa_s->wpa, NULL, bss->bssid, ssid, 0,
751 NULL,
752 wpa_s->key_mgmt == WPA_KEY_MGMT_FT_SAE ?
753 WPA_KEY_MGMT_FT_SAE :
754 WPA_KEY_MGMT_SAE) == 0) {
755 wpa_dbg(wpa_s, MSG_DEBUG,
756 "PMKSA cache entry found - try to use PMKSA caching instead of new SAE authentication");
757 wpa_sm_set_pmk_from_pmksa(wpa_s->wpa);
758 params.auth_alg = WPA_AUTH_ALG_OPEN;
759 wpa_s->sme.sae_pmksa_caching = 1;
760 }
761
762 if (!skip_auth && params.auth_alg == WPA_AUTH_ALG_SAE) {
763 if (start)
764 resp = sme_auth_build_sae_commit(wpa_s, ssid,
765 bss->bssid, 0,
766 start == 2, NULL,
767 NULL);
768 else
769 resp = sme_auth_build_sae_confirm(wpa_s, 0);
770 if (resp == NULL) {
771 wpas_connection_failed(wpa_s, bss->bssid);
772 return;
773 }
774 params.auth_data = wpabuf_head(resp);
775 params.auth_data_len = wpabuf_len(resp);
776 wpa_s->sme.sae.state = start ? SAE_COMMITTED : SAE_CONFIRMED;
777 }
778 #endif /* CONFIG_SAE */
779
780 bssid_changed = !is_zero_ether_addr(wpa_s->bssid);
781 os_memset(wpa_s->bssid, 0, ETH_ALEN);
782 os_memcpy(wpa_s->pending_bssid, bss->bssid, ETH_ALEN);
783 if (bssid_changed)
784 wpas_notify_bssid_changed(wpa_s);
785
786 old_ssid = wpa_s->current_ssid;
787 wpa_s->current_ssid = ssid;
788 wpa_supplicant_rsn_supp_set_config(wpa_s, wpa_s->current_ssid);
789 wpa_supplicant_initiate_eapol(wpa_s);
790
791 #ifdef CONFIG_FILS
792 /* TODO: FILS operations can in some cases be done between different
793 * network_ctx (i.e., same credentials can be used with multiple
794 * networks). */
795 if (params.auth_alg == WPA_AUTH_ALG_OPEN &&
796 wpa_key_mgmt_fils(ssid->key_mgmt)) {
797 const u8 *indic;
798 u16 fils_info;
799 const u8 *realm, *username, *rrk;
800 size_t realm_len, username_len, rrk_len;
801 u16 next_seq_num;
802
803 /*
804 * Check FILS Indication element (FILS Information field) bits
805 * indicating supported authentication algorithms against local
806 * configuration (ssid->fils_dh_group). Try to use FILS
807 * authentication only if the AP supports the combination in the
808 * network profile. */
809 indic = wpa_bss_get_ie(bss, WLAN_EID_FILS_INDICATION);
810 if (!indic || indic[1] < 2) {
811 wpa_printf(MSG_DEBUG, "SME: " MACSTR
812 " does not include FILS Indication element - cannot use FILS authentication with it",
813 MAC2STR(bss->bssid));
814 goto no_fils;
815 }
816
817 fils_info = WPA_GET_LE16(indic + 2);
818 if (ssid->fils_dh_group == 0 && !(fils_info & BIT(9))) {
819 wpa_printf(MSG_DEBUG, "SME: " MACSTR
820 " does not support FILS SK without PFS - cannot use FILS authentication with it",
821 MAC2STR(bss->bssid));
822 goto no_fils;
823 }
824 if (ssid->fils_dh_group != 0 && !(fils_info & BIT(10))) {
825 wpa_printf(MSG_DEBUG, "SME: " MACSTR
826 " does not support FILS SK with PFS - cannot use FILS authentication with it",
827 MAC2STR(bss->bssid));
828 goto no_fils;
829 }
830
831 if (wpa_s->last_con_fail_realm &&
832 eapol_sm_get_erp_info(wpa_s->eapol, &ssid->eap,
833 &username, &username_len,
834 &realm, &realm_len, &next_seq_num,
835 &rrk, &rrk_len) == 0 &&
836 realm && realm_len == wpa_s->last_con_fail_realm_len &&
837 os_memcmp(realm, wpa_s->last_con_fail_realm,
838 realm_len) == 0) {
839 wpa_printf(MSG_DEBUG,
840 "SME: FILS authentication for this realm failed last time - try to regenerate ERP key hierarchy");
841 goto no_fils;
842 }
843
844 if (pmksa_cache_set_current(wpa_s->wpa, NULL, bss->bssid,
845 ssid, 0,
846 wpa_bss_get_fils_cache_id(bss),
847 0) == 0)
848 wpa_printf(MSG_DEBUG,
849 "SME: Try to use FILS with PMKSA caching");
850 resp = fils_build_auth(wpa_s->wpa, ssid->fils_dh_group, md);
851 if (resp) {
852 int auth_alg;
853
854 if (ssid->fils_dh_group)
855 wpa_printf(MSG_DEBUG,
856 "SME: Try to use FILS SK authentication with PFS (DH Group %u)",
857 ssid->fils_dh_group);
858 else
859 wpa_printf(MSG_DEBUG,
860 "SME: Try to use FILS SK authentication without PFS");
861 auth_alg = ssid->fils_dh_group ?
862 WPA_AUTH_ALG_FILS_SK_PFS : WPA_AUTH_ALG_FILS;
863 params.auth_alg = auth_alg;
864 params.auth_data = wpabuf_head(resp);
865 params.auth_data_len = wpabuf_len(resp);
866 wpa_s->sme.auth_alg = auth_alg;
867 }
868 }
869 no_fils:
870 #endif /* CONFIG_FILS */
871
872 wpa_supplicant_cancel_sched_scan(wpa_s);
873 wpa_supplicant_cancel_scan(wpa_s);
874
875 wpa_msg(wpa_s, MSG_INFO, "SME: Trying to authenticate with " MACSTR
876 " (SSID='%s' freq=%d MHz)", MAC2STR(params.bssid),
877 wpa_ssid_txt(params.ssid, params.ssid_len), params.freq);
878
879 eapol_sm_notify_portValid(wpa_s->eapol, false);
880 wpa_clear_keys(wpa_s, bss->bssid);
881 wpa_supplicant_set_state(wpa_s, WPA_AUTHENTICATING);
882 if (old_ssid != wpa_s->current_ssid)
883 wpas_notify_network_changed(wpa_s);
884
885 #ifdef CONFIG_HS20
886 hs20_configure_frame_filters(wpa_s);
887 #endif /* CONFIG_HS20 */
888
889 #ifdef CONFIG_P2P
890 /*
891 * If multi-channel concurrency is not supported, check for any
892 * frequency conflict. In case of any frequency conflict, remove the
893 * least prioritized connection.
894 */
895 if (wpa_s->num_multichan_concurrent < 2) {
896 int freq, num;
897 num = get_shared_radio_freqs(wpa_s, &freq, 1);
898 if (num > 0 && freq > 0 && freq != params.freq) {
899 wpa_printf(MSG_DEBUG,
900 "Conflicting frequency found (%d != %d)",
901 freq, params.freq);
902 if (wpas_p2p_handle_frequency_conflicts(wpa_s,
903 params.freq,
904 ssid) < 0) {
905 wpas_connection_failed(wpa_s, bss->bssid);
906 wpa_supplicant_mark_disassoc(wpa_s);
907 wpabuf_free(resp);
908 wpas_connect_work_done(wpa_s);
909 return;
910 }
911 }
912 }
913 #endif /* CONFIG_P2P */
914
915 if (skip_auth) {
916 wpa_msg(wpa_s, MSG_DEBUG,
917 "SME: Skip authentication step on reassoc-to-same-BSS");
918 wpabuf_free(resp);
919 sme_associate(wpa_s, ssid->mode, bss->bssid, WLAN_AUTH_OPEN);
920 return;
921 }
922
923
924 wpa_s->sme.auth_alg = params.auth_alg;
925 if (wpa_drv_authenticate(wpa_s, ¶ms) < 0) {
926 wpa_msg(wpa_s, MSG_INFO, "SME: Authentication request to the "
927 "driver failed");
928 wpas_connection_failed(wpa_s, bss->bssid);
929 wpa_supplicant_mark_disassoc(wpa_s);
930 wpabuf_free(resp);
931 wpas_connect_work_done(wpa_s);
932 return;
933 }
934
935 eloop_register_timeout(SME_AUTH_TIMEOUT, 0, sme_auth_timer, wpa_s,
936 NULL);
937
938 /*
939 * Association will be started based on the authentication event from
940 * the driver.
941 */
942
943 wpabuf_free(resp);
944 }
945
946
sme_auth_start_cb(struct wpa_radio_work * work,int deinit)947 static void sme_auth_start_cb(struct wpa_radio_work *work, int deinit)
948 {
949 struct wpa_connect_work *cwork = work->ctx;
950 struct wpa_supplicant *wpa_s = work->wpa_s;
951
952 wpa_s->roam_in_progress = false;
953 #ifdef CONFIG_WNM
954 wpa_s->bss_trans_mgmt_in_progress = false;
955 #endif /* CONFIG_WNM */
956
957 if (deinit) {
958 if (work->started)
959 wpa_s->connect_work = NULL;
960
961 wpas_connect_work_free(cwork);
962 return;
963 }
964
965 wpa_s->connect_work = work;
966
967 if (cwork->bss_removed ||
968 !wpas_valid_bss_ssid(wpa_s, cwork->bss, cwork->ssid) ||
969 wpas_network_disabled(wpa_s, cwork->ssid)) {
970 wpa_dbg(wpa_s, MSG_DEBUG, "SME: BSS/SSID entry for authentication not valid anymore - drop connection attempt");
971 wpas_connect_work_done(wpa_s);
972 return;
973 }
974
975 /* Starting new connection, so clear the possibly used WPA IE from the
976 * previous association. */
977 wpa_sm_set_assoc_wpa_ie(wpa_s->wpa, NULL, 0);
978 wpa_sm_set_assoc_rsnxe(wpa_s->wpa, NULL, 0);
979 wpa_s->rsnxe_len = 0;
980
981 sme_send_authentication(wpa_s, cwork->bss, cwork->ssid, 1);
982 }
983
984
sme_authenticate(struct wpa_supplicant * wpa_s,struct wpa_bss * bss,struct wpa_ssid * ssid)985 void sme_authenticate(struct wpa_supplicant *wpa_s,
986 struct wpa_bss *bss, struct wpa_ssid *ssid)
987 {
988 struct wpa_connect_work *cwork;
989
990 if (bss == NULL || ssid == NULL)
991 return;
992 if (wpa_s->connect_work) {
993 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Reject sme_authenticate() call since connect_work exist");
994 return;
995 }
996
997 if (wpa_s->roam_in_progress) {
998 wpa_dbg(wpa_s, MSG_DEBUG,
999 "SME: Reject sme_authenticate() in favor of explicit roam request");
1000 return;
1001 }
1002 #ifdef CONFIG_WNM
1003 if (wpa_s->bss_trans_mgmt_in_progress) {
1004 wpa_dbg(wpa_s, MSG_DEBUG,
1005 "SME: Reject sme_authenticate() in favor of BSS transition management request");
1006 return;
1007 }
1008 #endif /* CONFIG_WNM */
1009 if (radio_work_pending(wpa_s, "sme-connect")) {
1010 /*
1011 * The previous sme-connect work might no longer be valid due to
1012 * the fact that the BSS list was updated. In addition, it makes
1013 * sense to adhere to the 'newer' decision.
1014 */
1015 wpa_dbg(wpa_s, MSG_DEBUG,
1016 "SME: Remove previous pending sme-connect");
1017 radio_remove_works(wpa_s, "sme-connect", 0);
1018 }
1019
1020 wpas_abort_ongoing_scan(wpa_s);
1021
1022 cwork = os_zalloc(sizeof(*cwork));
1023 if (cwork == NULL)
1024 return;
1025 cwork->bss = bss;
1026 cwork->ssid = ssid;
1027 cwork->sme = 1;
1028
1029 #ifdef CONFIG_SAE
1030 wpa_s->sme.sae.state = SAE_NOTHING;
1031 wpa_s->sme.sae.send_confirm = 0;
1032 wpa_s->sme.sae_group_index = 0;
1033 #endif /* CONFIG_SAE */
1034
1035 if (radio_add_work(wpa_s, bss->freq, "sme-connect", 1,
1036 sme_auth_start_cb, cwork) < 0)
1037 wpas_connect_work_free(cwork);
1038 }
1039
1040
1041 #ifdef CONFIG_SAE
1042
sme_external_auth_build_buf(struct wpabuf * buf,struct wpabuf * params,const u8 * sa,const u8 * da,u16 auth_transaction,u16 seq_num,u16 status_code)1043 static int sme_external_auth_build_buf(struct wpabuf *buf,
1044 struct wpabuf *params,
1045 const u8 *sa, const u8 *da,
1046 u16 auth_transaction, u16 seq_num,
1047 u16 status_code)
1048 {
1049 struct ieee80211_mgmt *resp;
1050
1051 resp = wpabuf_put(buf, offsetof(struct ieee80211_mgmt,
1052 u.auth.variable));
1053
1054 resp->frame_control = host_to_le16((WLAN_FC_TYPE_MGMT << 2) |
1055 (WLAN_FC_STYPE_AUTH << 4));
1056 os_memcpy(resp->da, da, ETH_ALEN);
1057 os_memcpy(resp->sa, sa, ETH_ALEN);
1058 os_memcpy(resp->bssid, da, ETH_ALEN);
1059 resp->u.auth.auth_alg = host_to_le16(WLAN_AUTH_SAE);
1060 resp->seq_ctrl = host_to_le16(seq_num << 4);
1061 resp->u.auth.auth_transaction = host_to_le16(auth_transaction);
1062 resp->u.auth.status_code = host_to_le16(status_code);
1063 if (params)
1064 wpabuf_put_buf(buf, params);
1065
1066 return 0;
1067 }
1068
1069
sme_external_auth_send_sae_commit(struct wpa_supplicant * wpa_s,const u8 * bssid,struct wpa_ssid * ssid)1070 static int sme_external_auth_send_sae_commit(struct wpa_supplicant *wpa_s,
1071 const u8 *bssid,
1072 struct wpa_ssid *ssid)
1073 {
1074 struct wpabuf *resp, *buf;
1075 int use_pt;
1076 bool use_pk;
1077 u16 status;
1078
1079 resp = sme_auth_build_sae_commit(wpa_s, ssid, bssid, 1, 0, &use_pt,
1080 &use_pk);
1081 if (!resp) {
1082 wpa_printf(MSG_DEBUG, "SAE: Failed to build SAE commit");
1083 return -1;
1084 }
1085
1086 wpa_s->sme.sae.state = SAE_COMMITTED;
1087 buf = wpabuf_alloc(4 + SAE_COMMIT_MAX_LEN + wpabuf_len(resp));
1088 if (!buf) {
1089 wpabuf_free(resp);
1090 return -1;
1091 }
1092
1093 wpa_s->sme.seq_num++;
1094 if (use_pk)
1095 status = WLAN_STATUS_SAE_PK;
1096 else if (use_pt)
1097 status = WLAN_STATUS_SAE_HASH_TO_ELEMENT;
1098 else
1099 status = WLAN_STATUS_SUCCESS;
1100 sme_external_auth_build_buf(buf, resp, wpa_s->own_addr,
1101 bssid, 1, wpa_s->sme.seq_num, status);
1102 wpa_drv_send_mlme(wpa_s, wpabuf_head(buf), wpabuf_len(buf), 1, 0, 0);
1103 wpabuf_free(resp);
1104 wpabuf_free(buf);
1105
1106 return 0;
1107 }
1108
1109
sme_send_external_auth_status(struct wpa_supplicant * wpa_s,u16 status)1110 static void sme_send_external_auth_status(struct wpa_supplicant *wpa_s,
1111 u16 status)
1112 {
1113 struct external_auth params;
1114
1115 os_memset(¶ms, 0, sizeof(params));
1116 params.status = status;
1117 params.ssid = wpa_s->sme.ext_auth_ssid;
1118 params.ssid_len = wpa_s->sme.ext_auth_ssid_len;
1119 params.bssid = wpa_s->sme.ext_auth_bssid;
1120 if (wpa_s->conf->sae_pmkid_in_assoc && status == WLAN_STATUS_SUCCESS)
1121 params.pmkid = wpa_s->sme.sae.pmkid;
1122 wpa_drv_send_external_auth_status(wpa_s, ¶ms);
1123 }
1124
1125
sme_handle_external_auth_start(struct wpa_supplicant * wpa_s,union wpa_event_data * data)1126 static int sme_handle_external_auth_start(struct wpa_supplicant *wpa_s,
1127 union wpa_event_data *data)
1128 {
1129 struct wpa_ssid *ssid;
1130 size_t ssid_str_len = data->external_auth.ssid_len;
1131 const u8 *ssid_str = data->external_auth.ssid;
1132
1133 /* Get the SSID conf from the ssid string obtained */
1134 for (ssid = wpa_s->conf->ssid; ssid; ssid = ssid->next) {
1135 if (!wpas_network_disabled(wpa_s, ssid) &&
1136 ssid_str_len == ssid->ssid_len &&
1137 os_memcmp(ssid_str, ssid->ssid, ssid_str_len) == 0 &&
1138 (ssid->key_mgmt & (WPA_KEY_MGMT_SAE | WPA_KEY_MGMT_FT_SAE)))
1139 break;
1140 }
1141 if (!ssid ||
1142 sme_external_auth_send_sae_commit(wpa_s, data->external_auth.bssid,
1143 ssid) < 0)
1144 return -1;
1145
1146 return 0;
1147 }
1148
1149
sme_external_auth_send_sae_confirm(struct wpa_supplicant * wpa_s,const u8 * da)1150 static void sme_external_auth_send_sae_confirm(struct wpa_supplicant *wpa_s,
1151 const u8 *da)
1152 {
1153 struct wpabuf *resp, *buf;
1154
1155 resp = sme_auth_build_sae_confirm(wpa_s, 1);
1156 if (!resp) {
1157 wpa_printf(MSG_DEBUG, "SAE: Confirm message buf alloc failure");
1158 return;
1159 }
1160
1161 wpa_s->sme.sae.state = SAE_CONFIRMED;
1162 buf = wpabuf_alloc(4 + SAE_CONFIRM_MAX_LEN + wpabuf_len(resp));
1163 if (!buf) {
1164 wpa_printf(MSG_DEBUG, "SAE: Auth Confirm buf alloc failure");
1165 wpabuf_free(resp);
1166 return;
1167 }
1168 wpa_s->sme.seq_num++;
1169 sme_external_auth_build_buf(buf, resp, wpa_s->own_addr,
1170 da, 2, wpa_s->sme.seq_num,
1171 WLAN_STATUS_SUCCESS);
1172 wpa_drv_send_mlme(wpa_s, wpabuf_head(buf), wpabuf_len(buf), 1, 0, 0);
1173 wpabuf_free(resp);
1174 wpabuf_free(buf);
1175 }
1176
1177
sme_external_auth_trigger(struct wpa_supplicant * wpa_s,union wpa_event_data * data)1178 void sme_external_auth_trigger(struct wpa_supplicant *wpa_s,
1179 union wpa_event_data *data)
1180 {
1181 if (RSN_SELECTOR_GET(&data->external_auth.key_mgmt_suite) !=
1182 RSN_AUTH_KEY_MGMT_SAE)
1183 return;
1184
1185 if (data->external_auth.action == EXT_AUTH_START) {
1186 if (!data->external_auth.bssid || !data->external_auth.ssid)
1187 return;
1188 os_memcpy(wpa_s->sme.ext_auth_bssid, data->external_auth.bssid,
1189 ETH_ALEN);
1190 os_memcpy(wpa_s->sme.ext_auth_ssid, data->external_auth.ssid,
1191 data->external_auth.ssid_len);
1192 wpa_s->sme.ext_auth_ssid_len = data->external_auth.ssid_len;
1193 wpa_s->sme.seq_num = 0;
1194 wpa_s->sme.sae.state = SAE_NOTHING;
1195 wpa_s->sme.sae.send_confirm = 0;
1196 wpa_s->sme.sae_group_index = 0;
1197 if (sme_handle_external_auth_start(wpa_s, data) < 0)
1198 sme_send_external_auth_status(wpa_s,
1199 WLAN_STATUS_UNSPECIFIED_FAILURE);
1200 } else if (data->external_auth.action == EXT_AUTH_ABORT) {
1201 /* Report failure to driver for the wrong trigger */
1202 sme_send_external_auth_status(wpa_s,
1203 WLAN_STATUS_UNSPECIFIED_FAILURE);
1204 }
1205 }
1206
1207
sme_sae_is_group_enabled(struct wpa_supplicant * wpa_s,int group)1208 static int sme_sae_is_group_enabled(struct wpa_supplicant *wpa_s, int group)
1209 {
1210 int *groups = wpa_s->conf->sae_groups;
1211 int default_groups[] = { 19, 20, 21, 0 };
1212 int i;
1213
1214 if (!groups)
1215 groups = default_groups;
1216
1217 for (i = 0; groups[i] > 0; i++) {
1218 if (groups[i] == group)
1219 return 1;
1220 }
1221
1222 return 0;
1223 }
1224
1225
sme_check_sae_rejected_groups(struct wpa_supplicant * wpa_s,const struct wpabuf * groups)1226 static int sme_check_sae_rejected_groups(struct wpa_supplicant *wpa_s,
1227 const struct wpabuf *groups)
1228 {
1229 size_t i, count;
1230 const u8 *pos;
1231
1232 if (!groups)
1233 return 0;
1234
1235 pos = wpabuf_head(groups);
1236 count = wpabuf_len(groups) / 2;
1237 for (i = 0; i < count; i++) {
1238 int enabled;
1239 u16 group;
1240
1241 group = WPA_GET_LE16(pos);
1242 pos += 2;
1243 enabled = sme_sae_is_group_enabled(wpa_s, group);
1244 wpa_printf(MSG_DEBUG, "SAE: Rejected group %u is %s",
1245 group, enabled ? "enabled" : "disabled");
1246 if (enabled)
1247 return 1;
1248 }
1249
1250 return 0;
1251 }
1252
1253
sme_sae_auth(struct wpa_supplicant * wpa_s,u16 auth_transaction,u16 status_code,const u8 * data,size_t len,int external,const u8 * sa)1254 static int sme_sae_auth(struct wpa_supplicant *wpa_s, u16 auth_transaction,
1255 u16 status_code, const u8 *data, size_t len,
1256 int external, const u8 *sa)
1257 {
1258 int *groups;
1259
1260 wpa_dbg(wpa_s, MSG_DEBUG, "SME: SAE authentication transaction %u "
1261 "status code %u", auth_transaction, status_code);
1262
1263 if (auth_transaction == 1 &&
1264 status_code == WLAN_STATUS_ANTI_CLOGGING_TOKEN_REQ &&
1265 wpa_s->sme.sae.state == SAE_COMMITTED &&
1266 (external || wpa_s->current_bss) && wpa_s->current_ssid) {
1267 int default_groups[] = { 19, 20, 21, 0 };
1268 u16 group;
1269 const u8 *token_pos;
1270 size_t token_len;
1271 int h2e = 0;
1272
1273 groups = wpa_s->conf->sae_groups;
1274 if (!groups || groups[0] <= 0)
1275 groups = default_groups;
1276
1277 wpa_hexdump(MSG_DEBUG, "SME: SAE anti-clogging token request",
1278 data, len);
1279 if (len < sizeof(le16)) {
1280 wpa_dbg(wpa_s, MSG_DEBUG,
1281 "SME: Too short SAE anti-clogging token request");
1282 return -1;
1283 }
1284 group = WPA_GET_LE16(data);
1285 wpa_dbg(wpa_s, MSG_DEBUG,
1286 "SME: SAE anti-clogging token requested (group %u)",
1287 group);
1288 if (sae_group_allowed(&wpa_s->sme.sae, groups, group) !=
1289 WLAN_STATUS_SUCCESS) {
1290 wpa_dbg(wpa_s, MSG_ERROR,
1291 "SME: SAE group %u of anti-clogging request is invalid",
1292 group);
1293 return -1;
1294 }
1295 wpabuf_free(wpa_s->sme.sae_token);
1296 token_pos = data + sizeof(le16);
1297 token_len = len - sizeof(le16);
1298 h2e = wpa_s->sme.sae.h2e;
1299 if (h2e) {
1300 if (token_len < 3) {
1301 wpa_dbg(wpa_s, MSG_DEBUG,
1302 "SME: Too short SAE anti-clogging token container");
1303 return -1;
1304 }
1305 if (token_pos[0] != WLAN_EID_EXTENSION ||
1306 token_pos[1] == 0 ||
1307 token_pos[1] > token_len - 2 ||
1308 token_pos[2] != WLAN_EID_EXT_ANTI_CLOGGING_TOKEN) {
1309 wpa_dbg(wpa_s, MSG_DEBUG,
1310 "SME: Invalid SAE anti-clogging token container header");
1311 return -1;
1312 }
1313 token_len = token_pos[1] - 1;
1314 token_pos += 3;
1315 }
1316 wpa_s->sme.sae_token = wpabuf_alloc_copy(token_pos, token_len);
1317 wpa_hexdump_buf(MSG_DEBUG, "SME: Requested anti-clogging token",
1318 wpa_s->sme.sae_token);
1319 if (!external)
1320 sme_send_authentication(wpa_s, wpa_s->current_bss,
1321 wpa_s->current_ssid, 2);
1322 else
1323 sme_external_auth_send_sae_commit(
1324 wpa_s, wpa_s->sme.ext_auth_bssid,
1325 wpa_s->current_ssid);
1326 return 0;
1327 }
1328
1329 if (auth_transaction == 1 &&
1330 status_code == WLAN_STATUS_FINITE_CYCLIC_GROUP_NOT_SUPPORTED &&
1331 wpa_s->sme.sae.state == SAE_COMMITTED &&
1332 (external || wpa_s->current_bss) && wpa_s->current_ssid) {
1333 wpa_dbg(wpa_s, MSG_DEBUG, "SME: SAE group not supported");
1334 int_array_add_unique(&wpa_s->sme.sae_rejected_groups,
1335 wpa_s->sme.sae.group);
1336 wpa_s->sme.sae_group_index++;
1337 if (sme_set_sae_group(wpa_s) < 0)
1338 return -1; /* no other groups enabled */
1339 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Try next enabled SAE group");
1340 if (!external)
1341 sme_send_authentication(wpa_s, wpa_s->current_bss,
1342 wpa_s->current_ssid, 1);
1343 else
1344 sme_external_auth_send_sae_commit(
1345 wpa_s, wpa_s->sme.ext_auth_bssid,
1346 wpa_s->current_ssid);
1347 return 0;
1348 }
1349
1350 if (auth_transaction == 1 &&
1351 status_code == WLAN_STATUS_UNKNOWN_PASSWORD_IDENTIFIER) {
1352 const u8 *bssid = sa ? sa : wpa_s->pending_bssid;
1353
1354 wpa_msg(wpa_s, MSG_INFO,
1355 WPA_EVENT_SAE_UNKNOWN_PASSWORD_IDENTIFIER MACSTR,
1356 MAC2STR(bssid));
1357 return -1;
1358 }
1359
1360 if (status_code != WLAN_STATUS_SUCCESS &&
1361 status_code != WLAN_STATUS_SAE_HASH_TO_ELEMENT &&
1362 status_code != WLAN_STATUS_SAE_PK) {
1363 const u8 *bssid = sa ? sa : wpa_s->pending_bssid;
1364
1365 wpa_msg(wpa_s, MSG_INFO, WPA_EVENT_AUTH_REJECT MACSTR
1366 " auth_type=%u auth_transaction=%u status_code=%u",
1367 MAC2STR(bssid), WLAN_AUTH_SAE,
1368 auth_transaction, status_code);
1369 return -2;
1370 }
1371
1372 if (auth_transaction == 1) {
1373 u16 res;
1374
1375 groups = wpa_s->conf->sae_groups;
1376
1377 wpa_dbg(wpa_s, MSG_DEBUG, "SME SAE commit");
1378 if ((!external && wpa_s->current_bss == NULL) ||
1379 wpa_s->current_ssid == NULL)
1380 return -1;
1381 if (wpa_s->sme.sae.state != SAE_COMMITTED) {
1382 wpa_printf(MSG_DEBUG,
1383 "SAE: Ignore commit message while waiting for confirm");
1384 return 0;
1385 }
1386 if (wpa_s->sme.sae.h2e && status_code == WLAN_STATUS_SUCCESS) {
1387 wpa_printf(MSG_DEBUG,
1388 "SAE: Unexpected use of status code 0 in SAE commit when H2E was expected");
1389 return -1;
1390 }
1391 if ((!wpa_s->sme.sae.h2e || wpa_s->sme.sae.pk) &&
1392 status_code == WLAN_STATUS_SAE_HASH_TO_ELEMENT) {
1393 wpa_printf(MSG_DEBUG,
1394 "SAE: Unexpected use of status code for H2E in SAE commit when H2E was not expected");
1395 return -1;
1396 }
1397 if (!wpa_s->sme.sae.pk &&
1398 status_code == WLAN_STATUS_SAE_PK) {
1399 wpa_printf(MSG_DEBUG,
1400 "SAE: Unexpected use of status code for PK in SAE commit when PK was not expected");
1401 return -1;
1402 }
1403
1404 if (groups && groups[0] <= 0)
1405 groups = NULL;
1406 res = sae_parse_commit(&wpa_s->sme.sae, data, len, NULL, NULL,
1407 groups, status_code ==
1408 WLAN_STATUS_SAE_HASH_TO_ELEMENT ||
1409 status_code == WLAN_STATUS_SAE_PK);
1410 if (res == SAE_SILENTLY_DISCARD) {
1411 wpa_printf(MSG_DEBUG,
1412 "SAE: Drop commit message due to reflection attack");
1413 return 0;
1414 }
1415 if (res != WLAN_STATUS_SUCCESS)
1416 return -1;
1417
1418 if (wpa_s->sme.sae.tmp &&
1419 sme_check_sae_rejected_groups(
1420 wpa_s,
1421 wpa_s->sme.sae.tmp->peer_rejected_groups))
1422 return -1;
1423
1424 if (sae_process_commit(&wpa_s->sme.sae) < 0) {
1425 wpa_printf(MSG_DEBUG, "SAE: Failed to process peer "
1426 "commit");
1427 return -1;
1428 }
1429
1430 wpabuf_free(wpa_s->sme.sae_token);
1431 wpa_s->sme.sae_token = NULL;
1432 if (!external)
1433 sme_send_authentication(wpa_s, wpa_s->current_bss,
1434 wpa_s->current_ssid, 0);
1435 else
1436 sme_external_auth_send_sae_confirm(wpa_s, sa);
1437 return 0;
1438 } else if (auth_transaction == 2) {
1439 if (status_code != WLAN_STATUS_SUCCESS)
1440 return -1;
1441 wpa_dbg(wpa_s, MSG_DEBUG, "SME SAE confirm");
1442 if (wpa_s->sme.sae.state != SAE_CONFIRMED)
1443 return -1;
1444 if (sae_check_confirm(&wpa_s->sme.sae, data, len) < 0)
1445 return -1;
1446 wpa_s->sme.sae.state = SAE_ACCEPTED;
1447 sae_clear_temp_data(&wpa_s->sme.sae);
1448
1449 if (external) {
1450 /* Report success to driver */
1451 sme_send_external_auth_status(wpa_s,
1452 WLAN_STATUS_SUCCESS);
1453 }
1454
1455 return 1;
1456 }
1457
1458 return -1;
1459 }
1460
1461
sme_sae_set_pmk(struct wpa_supplicant * wpa_s,const u8 * bssid)1462 static int sme_sae_set_pmk(struct wpa_supplicant *wpa_s, const u8 *bssid)
1463 {
1464 wpa_printf(MSG_DEBUG,
1465 "SME: SAE completed - setting PMK for 4-way handshake");
1466 wpa_sm_set_pmk(wpa_s->wpa, wpa_s->sme.sae.pmk, PMK_LEN,
1467 wpa_s->sme.sae.pmkid, bssid);
1468 if (wpa_s->conf->sae_pmkid_in_assoc) {
1469 /* Update the own RSNE contents now that we have set the PMK
1470 * and added a PMKSA cache entry based on the successfully
1471 * completed SAE exchange. In practice, this will add the PMKID
1472 * into RSNE. */
1473 if (wpa_s->sme.assoc_req_ie_len + 2 + PMKID_LEN >
1474 sizeof(wpa_s->sme.assoc_req_ie)) {
1475 wpa_msg(wpa_s, MSG_WARNING,
1476 "RSN: Not enough room for inserting own PMKID into RSNE");
1477 return -1;
1478 }
1479 if (wpa_insert_pmkid(wpa_s->sme.assoc_req_ie,
1480 &wpa_s->sme.assoc_req_ie_len,
1481 wpa_s->sme.sae.pmkid) < 0)
1482 return -1;
1483 wpa_hexdump(MSG_DEBUG,
1484 "SME: Updated Association Request IEs",
1485 wpa_s->sme.assoc_req_ie,
1486 wpa_s->sme.assoc_req_ie_len);
1487 }
1488
1489 return 0;
1490 }
1491
1492
sme_external_auth_mgmt_rx(struct wpa_supplicant * wpa_s,const u8 * auth_frame,size_t len)1493 void sme_external_auth_mgmt_rx(struct wpa_supplicant *wpa_s,
1494 const u8 *auth_frame, size_t len)
1495 {
1496 const struct ieee80211_mgmt *header;
1497 size_t auth_length;
1498
1499 header = (const struct ieee80211_mgmt *) auth_frame;
1500 auth_length = IEEE80211_HDRLEN + sizeof(header->u.auth);
1501
1502 if (len < auth_length) {
1503 /* Notify failure to the driver */
1504 sme_send_external_auth_status(wpa_s,
1505 WLAN_STATUS_UNSPECIFIED_FAILURE);
1506 return;
1507 }
1508
1509 if (le_to_host16(header->u.auth.auth_alg) == WLAN_AUTH_SAE) {
1510 int res;
1511
1512 res = sme_sae_auth(
1513 wpa_s, le_to_host16(header->u.auth.auth_transaction),
1514 le_to_host16(header->u.auth.status_code),
1515 header->u.auth.variable,
1516 len - auth_length, 1, header->sa);
1517 if (res < 0) {
1518 /* Notify failure to the driver */
1519 sme_send_external_auth_status(
1520 wpa_s,
1521 res == -2 ?
1522 le_to_host16(header->u.auth.status_code) :
1523 WLAN_STATUS_UNSPECIFIED_FAILURE);
1524 return;
1525 }
1526 if (res != 1)
1527 return;
1528
1529 if (sme_sae_set_pmk(wpa_s, wpa_s->sme.ext_auth_bssid) < 0)
1530 return;
1531 }
1532 }
1533
1534 #endif /* CONFIG_SAE */
1535
1536
sme_event_auth(struct wpa_supplicant * wpa_s,union wpa_event_data * data)1537 void sme_event_auth(struct wpa_supplicant *wpa_s, union wpa_event_data *data)
1538 {
1539 struct wpa_ssid *ssid = wpa_s->current_ssid;
1540
1541 if (ssid == NULL) {
1542 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Ignore authentication event "
1543 "when network is not selected");
1544 return;
1545 }
1546
1547 if (wpa_s->wpa_state != WPA_AUTHENTICATING) {
1548 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Ignore authentication event "
1549 "when not in authenticating state");
1550 return;
1551 }
1552
1553 if (os_memcmp(wpa_s->pending_bssid, data->auth.peer, ETH_ALEN) != 0) {
1554 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Ignore authentication with "
1555 "unexpected peer " MACSTR,
1556 MAC2STR(data->auth.peer));
1557 return;
1558 }
1559
1560 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Authentication response: peer=" MACSTR
1561 " auth_type=%d auth_transaction=%d status_code=%d",
1562 MAC2STR(data->auth.peer), data->auth.auth_type,
1563 data->auth.auth_transaction, data->auth.status_code);
1564 wpa_hexdump(MSG_MSGDUMP, "SME: Authentication response IEs",
1565 data->auth.ies, data->auth.ies_len);
1566
1567 eloop_cancel_timeout(sme_auth_timer, wpa_s, NULL);
1568
1569 #ifdef CONFIG_SAE
1570 if (data->auth.auth_type == WLAN_AUTH_SAE) {
1571 int res;
1572 res = sme_sae_auth(wpa_s, data->auth.auth_transaction,
1573 data->auth.status_code, data->auth.ies,
1574 data->auth.ies_len, 0, data->auth.peer);
1575 if (res < 0) {
1576 wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
1577 wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED);
1578
1579 }
1580 if (res != 1)
1581 return;
1582
1583 if (sme_sae_set_pmk(wpa_s, wpa_s->pending_bssid) < 0)
1584 return;
1585 }
1586 #endif /* CONFIG_SAE */
1587
1588 if (data->auth.status_code != WLAN_STATUS_SUCCESS) {
1589 char *ie_txt = NULL;
1590
1591 if (data->auth.ies && data->auth.ies_len) {
1592 size_t buflen = 2 * data->auth.ies_len + 1;
1593 ie_txt = os_malloc(buflen);
1594 if (ie_txt) {
1595 wpa_snprintf_hex(ie_txt, buflen, data->auth.ies,
1596 data->auth.ies_len);
1597 }
1598 }
1599 wpa_msg(wpa_s, MSG_INFO, WPA_EVENT_AUTH_REJECT MACSTR
1600 " auth_type=%u auth_transaction=%u status_code=%u%s%s",
1601 MAC2STR(data->auth.peer), data->auth.auth_type,
1602 data->auth.auth_transaction, data->auth.status_code,
1603 ie_txt ? " ie=" : "",
1604 ie_txt ? ie_txt : "");
1605 os_free(ie_txt);
1606
1607 #ifdef CONFIG_FILS
1608 if (wpa_s->sme.auth_alg == WPA_AUTH_ALG_FILS ||
1609 wpa_s->sme.auth_alg == WPA_AUTH_ALG_FILS_SK_PFS)
1610 fils_connection_failure(wpa_s);
1611 #endif /* CONFIG_FILS */
1612
1613 if (data->auth.status_code !=
1614 WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG ||
1615 wpa_s->sme.auth_alg == data->auth.auth_type ||
1616 wpa_s->current_ssid->auth_alg == WPA_AUTH_ALG_LEAP) {
1617 wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
1618 wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED);
1619 return;
1620 }
1621
1622 wpas_connect_work_done(wpa_s);
1623
1624 switch (data->auth.auth_type) {
1625 case WLAN_AUTH_OPEN:
1626 wpa_s->current_ssid->auth_alg = WPA_AUTH_ALG_SHARED;
1627
1628 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Trying SHARED auth");
1629 wpa_supplicant_associate(wpa_s, wpa_s->current_bss,
1630 wpa_s->current_ssid);
1631 return;
1632
1633 case WLAN_AUTH_SHARED_KEY:
1634 wpa_s->current_ssid->auth_alg = WPA_AUTH_ALG_LEAP;
1635
1636 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Trying LEAP auth");
1637 wpa_supplicant_associate(wpa_s, wpa_s->current_bss,
1638 wpa_s->current_ssid);
1639 return;
1640
1641 default:
1642 return;
1643 }
1644 }
1645
1646 #ifdef CONFIG_IEEE80211R
1647 if (data->auth.auth_type == WLAN_AUTH_FT) {
1648 const u8 *ric_ies = NULL;
1649 size_t ric_ies_len = 0;
1650
1651 if (wpa_s->ric_ies) {
1652 ric_ies = wpabuf_head(wpa_s->ric_ies);
1653 ric_ies_len = wpabuf_len(wpa_s->ric_ies);
1654 }
1655 if (wpa_ft_process_response(wpa_s->wpa, data->auth.ies,
1656 data->auth.ies_len, 0,
1657 data->auth.peer,
1658 ric_ies, ric_ies_len) < 0) {
1659 wpa_dbg(wpa_s, MSG_DEBUG,
1660 "SME: FT Authentication response processing failed");
1661 wpa_msg(wpa_s, MSG_INFO, WPA_EVENT_DISCONNECTED "bssid="
1662 MACSTR
1663 " reason=%d locally_generated=1",
1664 MAC2STR(wpa_s->pending_bssid),
1665 WLAN_REASON_DEAUTH_LEAVING);
1666 wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
1667 wpa_supplicant_mark_disassoc(wpa_s);
1668 return;
1669 }
1670 }
1671 #endif /* CONFIG_IEEE80211R */
1672
1673 #ifdef CONFIG_FILS
1674 if (data->auth.auth_type == WLAN_AUTH_FILS_SK ||
1675 data->auth.auth_type == WLAN_AUTH_FILS_SK_PFS) {
1676 u16 expect_auth_type;
1677
1678 expect_auth_type = wpa_s->sme.auth_alg ==
1679 WPA_AUTH_ALG_FILS_SK_PFS ? WLAN_AUTH_FILS_SK_PFS :
1680 WLAN_AUTH_FILS_SK;
1681 if (data->auth.auth_type != expect_auth_type) {
1682 wpa_dbg(wpa_s, MSG_DEBUG,
1683 "SME: FILS Authentication response used different auth alg (%u; expected %u)",
1684 data->auth.auth_type, expect_auth_type);
1685 wpa_msg(wpa_s, MSG_INFO, WPA_EVENT_DISCONNECTED "bssid="
1686 MACSTR
1687 " reason=%d locally_generated=1",
1688 MAC2STR(wpa_s->pending_bssid),
1689 WLAN_REASON_DEAUTH_LEAVING);
1690 wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
1691 wpa_supplicant_mark_disassoc(wpa_s);
1692 return;
1693 }
1694
1695 if (fils_process_auth(wpa_s->wpa, wpa_s->pending_bssid,
1696 data->auth.ies, data->auth.ies_len) < 0) {
1697 wpa_dbg(wpa_s, MSG_DEBUG,
1698 "SME: FILS Authentication response processing failed");
1699 wpa_msg(wpa_s, MSG_INFO, WPA_EVENT_DISCONNECTED "bssid="
1700 MACSTR
1701 " reason=%d locally_generated=1",
1702 MAC2STR(wpa_s->pending_bssid),
1703 WLAN_REASON_DEAUTH_LEAVING);
1704 wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
1705 wpa_supplicant_mark_disassoc(wpa_s);
1706 return;
1707 }
1708 }
1709 #endif /* CONFIG_FILS */
1710
1711 sme_associate(wpa_s, ssid->mode, data->auth.peer,
1712 data->auth.auth_type);
1713 }
1714
1715
1716 #ifdef CONFIG_IEEE80211R
remove_ie(u8 * buf,size_t * len,u8 eid)1717 static void remove_ie(u8 *buf, size_t *len, u8 eid)
1718 {
1719 u8 *pos, *next, *end;
1720
1721 pos = (u8 *) get_ie(buf, *len, eid);
1722 if (pos) {
1723 next = pos + 2 + pos[1];
1724 end = buf + *len;
1725 *len -= 2 + pos[1];
1726 os_memmove(pos, next, end - next);
1727 }
1728 }
1729 #endif /* CONFIG_IEEE80211R */
1730
1731
sme_associate(struct wpa_supplicant * wpa_s,enum wpas_mode mode,const u8 * bssid,u16 auth_type)1732 void sme_associate(struct wpa_supplicant *wpa_s, enum wpas_mode mode,
1733 const u8 *bssid, u16 auth_type)
1734 {
1735 struct wpa_driver_associate_params params;
1736 struct ieee802_11_elems elems;
1737 struct wpa_ssid *ssid = wpa_s->current_ssid;
1738 #ifdef CONFIG_FILS
1739 u8 nonces[2 * FILS_NONCE_LEN];
1740 #endif /* CONFIG_FILS */
1741 #ifdef CONFIG_HT_OVERRIDES
1742 struct ieee80211_ht_capabilities htcaps;
1743 struct ieee80211_ht_capabilities htcaps_mask;
1744 #endif /* CONFIG_HT_OVERRIDES */
1745 #ifdef CONFIG_VHT_OVERRIDES
1746 struct ieee80211_vht_capabilities vhtcaps;
1747 struct ieee80211_vht_capabilities vhtcaps_mask;
1748 #endif /* CONFIG_VHT_OVERRIDES */
1749
1750 os_memset(¶ms, 0, sizeof(params));
1751
1752 #ifdef CONFIG_FILS
1753 if (auth_type == WLAN_AUTH_FILS_SK ||
1754 auth_type == WLAN_AUTH_FILS_SK_PFS) {
1755 struct wpabuf *buf;
1756 const u8 *snonce, *anonce;
1757 const unsigned int max_hlp = 20;
1758 struct wpabuf *hlp[max_hlp];
1759 unsigned int i, num_hlp = 0;
1760 struct fils_hlp_req *req;
1761
1762 dl_list_for_each(req, &wpa_s->fils_hlp_req, struct fils_hlp_req,
1763 list) {
1764 hlp[num_hlp] = wpabuf_alloc(2 * ETH_ALEN + 6 +
1765 wpabuf_len(req->pkt));
1766 if (!hlp[num_hlp])
1767 break;
1768 wpabuf_put_data(hlp[num_hlp], req->dst, ETH_ALEN);
1769 wpabuf_put_data(hlp[num_hlp], wpa_s->own_addr,
1770 ETH_ALEN);
1771 wpabuf_put_data(hlp[num_hlp],
1772 "\xaa\xaa\x03\x00\x00\x00", 6);
1773 wpabuf_put_buf(hlp[num_hlp], req->pkt);
1774 num_hlp++;
1775 if (num_hlp >= max_hlp)
1776 break;
1777 }
1778
1779 buf = fils_build_assoc_req(wpa_s->wpa, ¶ms.fils_kek,
1780 ¶ms.fils_kek_len, &snonce,
1781 &anonce,
1782 (const struct wpabuf **) hlp,
1783 num_hlp);
1784 for (i = 0; i < num_hlp; i++)
1785 wpabuf_free(hlp[i]);
1786 if (!buf)
1787 return;
1788 wpa_hexdump(MSG_DEBUG, "FILS: assoc_req before FILS elements",
1789 wpa_s->sme.assoc_req_ie,
1790 wpa_s->sme.assoc_req_ie_len);
1791 #ifdef CONFIG_IEEE80211R
1792 if (wpa_key_mgmt_ft(wpa_s->key_mgmt)) {
1793 /* Remove RSNE and MDE to allow them to be overridden
1794 * with FILS+FT specific values from
1795 * fils_build_assoc_req(). */
1796 remove_ie(wpa_s->sme.assoc_req_ie,
1797 &wpa_s->sme.assoc_req_ie_len,
1798 WLAN_EID_RSN);
1799 wpa_hexdump(MSG_DEBUG,
1800 "FILS: assoc_req after RSNE removal",
1801 wpa_s->sme.assoc_req_ie,
1802 wpa_s->sme.assoc_req_ie_len);
1803 remove_ie(wpa_s->sme.assoc_req_ie,
1804 &wpa_s->sme.assoc_req_ie_len,
1805 WLAN_EID_MOBILITY_DOMAIN);
1806 wpa_hexdump(MSG_DEBUG,
1807 "FILS: assoc_req after MDE removal",
1808 wpa_s->sme.assoc_req_ie,
1809 wpa_s->sme.assoc_req_ie_len);
1810 }
1811 #endif /* CONFIG_IEEE80211R */
1812 /* TODO: Make wpa_s->sme.assoc_req_ie use dynamic allocation */
1813 if (wpa_s->sme.assoc_req_ie_len + wpabuf_len(buf) >
1814 sizeof(wpa_s->sme.assoc_req_ie)) {
1815 wpa_printf(MSG_ERROR,
1816 "FILS: Not enough buffer room for own AssocReq elements");
1817 wpabuf_free(buf);
1818 return;
1819 }
1820 os_memcpy(wpa_s->sme.assoc_req_ie + wpa_s->sme.assoc_req_ie_len,
1821 wpabuf_head(buf), wpabuf_len(buf));
1822 wpa_s->sme.assoc_req_ie_len += wpabuf_len(buf);
1823 wpabuf_free(buf);
1824 wpa_hexdump(MSG_DEBUG, "FILS: assoc_req after FILS elements",
1825 wpa_s->sme.assoc_req_ie,
1826 wpa_s->sme.assoc_req_ie_len);
1827
1828 os_memcpy(nonces, snonce, FILS_NONCE_LEN);
1829 os_memcpy(nonces + FILS_NONCE_LEN, anonce, FILS_NONCE_LEN);
1830 params.fils_nonces = nonces;
1831 params.fils_nonces_len = sizeof(nonces);
1832 }
1833 #endif /* CONFIG_FILS */
1834
1835 #ifdef CONFIG_OWE
1836 #ifdef CONFIG_TESTING_OPTIONS
1837 if (get_ie_ext(wpa_s->sme.assoc_req_ie, wpa_s->sme.assoc_req_ie_len,
1838 WLAN_EID_EXT_OWE_DH_PARAM)) {
1839 wpa_printf(MSG_INFO, "TESTING: Override OWE DH element");
1840 } else
1841 #endif /* CONFIG_TESTING_OPTIONS */
1842 if (auth_type == WLAN_AUTH_OPEN &&
1843 wpa_s->key_mgmt == WPA_KEY_MGMT_OWE) {
1844 struct wpabuf *owe_ie;
1845 u16 group;
1846
1847 if (ssid && ssid->owe_group) {
1848 group = ssid->owe_group;
1849 } else if (wpa_s->assoc_status_code ==
1850 WLAN_STATUS_FINITE_CYCLIC_GROUP_NOT_SUPPORTED) {
1851 if (wpa_s->last_owe_group == 19)
1852 group = 20;
1853 else if (wpa_s->last_owe_group == 20)
1854 group = 21;
1855 else
1856 group = OWE_DH_GROUP;
1857 } else {
1858 group = OWE_DH_GROUP;
1859 }
1860
1861 wpa_s->last_owe_group = group;
1862 wpa_printf(MSG_DEBUG, "OWE: Try to use group %u", group);
1863 owe_ie = owe_build_assoc_req(wpa_s->wpa, group);
1864 if (!owe_ie) {
1865 wpa_printf(MSG_ERROR,
1866 "OWE: Failed to build IE for Association Request frame");
1867 return;
1868 }
1869 if (wpa_s->sme.assoc_req_ie_len + wpabuf_len(owe_ie) >
1870 sizeof(wpa_s->sme.assoc_req_ie)) {
1871 wpa_printf(MSG_ERROR,
1872 "OWE: Not enough buffer room for own Association Request frame elements");
1873 wpabuf_free(owe_ie);
1874 return;
1875 }
1876 os_memcpy(wpa_s->sme.assoc_req_ie + wpa_s->sme.assoc_req_ie_len,
1877 wpabuf_head(owe_ie), wpabuf_len(owe_ie));
1878 wpa_s->sme.assoc_req_ie_len += wpabuf_len(owe_ie);
1879 wpabuf_free(owe_ie);
1880 }
1881 #endif /* CONFIG_OWE */
1882
1883 #ifdef CONFIG_DPP2
1884 if (DPP_VERSION > 1 && wpa_s->key_mgmt == WPA_KEY_MGMT_DPP && ssid &&
1885 ssid->dpp_netaccesskey && ssid->dpp_pfs != 2 &&
1886 !ssid->dpp_pfs_fallback) {
1887 struct rsn_pmksa_cache_entry *pmksa;
1888
1889 pmksa = pmksa_cache_get_current(wpa_s->wpa);
1890 if (!pmksa || !pmksa->dpp_pfs)
1891 goto pfs_fail;
1892
1893 dpp_pfs_free(wpa_s->dpp_pfs);
1894 wpa_s->dpp_pfs = dpp_pfs_init(ssid->dpp_netaccesskey,
1895 ssid->dpp_netaccesskey_len);
1896 if (!wpa_s->dpp_pfs) {
1897 wpa_printf(MSG_DEBUG, "DPP: Could not initialize PFS");
1898 /* Try to continue without PFS */
1899 goto pfs_fail;
1900 }
1901 if (wpa_s->sme.assoc_req_ie_len +
1902 wpabuf_len(wpa_s->dpp_pfs->ie) >
1903 sizeof(wpa_s->sme.assoc_req_ie)) {
1904 wpa_printf(MSG_ERROR,
1905 "DPP: Not enough buffer room for own Association Request frame elements");
1906 dpp_pfs_free(wpa_s->dpp_pfs);
1907 wpa_s->dpp_pfs = NULL;
1908 goto pfs_fail;
1909 }
1910 os_memcpy(wpa_s->sme.assoc_req_ie + wpa_s->sme.assoc_req_ie_len,
1911 wpabuf_head(wpa_s->dpp_pfs->ie),
1912 wpabuf_len(wpa_s->dpp_pfs->ie));
1913 wpa_s->sme.assoc_req_ie_len += wpabuf_len(wpa_s->dpp_pfs->ie);
1914 }
1915 pfs_fail:
1916 #endif /* CONFIG_DPP2 */
1917
1918 wpa_s->mscs_setup_done = false;
1919 if (wpa_bss_ext_capab(wpa_s->current_bss, WLAN_EXT_CAPAB_MSCS) &&
1920 wpa_s->robust_av.valid_config) {
1921 struct wpabuf *mscs_ie;
1922 size_t mscs_ie_len, buf_len, *wpa_ie_len, max_ie_len;
1923
1924 buf_len = 3 + /* MSCS descriptor IE header */
1925 1 + /* Request type */
1926 2 + /* User priority control */
1927 4 + /* Stream timeout */
1928 3 + /* TCLAS Mask IE header */
1929 wpa_s->robust_av.frame_classifier_len;
1930 mscs_ie = wpabuf_alloc(buf_len);
1931 if (!mscs_ie) {
1932 wpa_printf(MSG_INFO,
1933 "MSCS: Failed to allocate MSCS IE");
1934 goto mscs_fail;
1935 }
1936
1937 wpa_ie_len = &wpa_s->sme.assoc_req_ie_len;
1938 max_ie_len = sizeof(wpa_s->sme.assoc_req_ie);
1939 wpas_populate_mscs_descriptor_ie(&wpa_s->robust_av, mscs_ie);
1940 if ((*wpa_ie_len + wpabuf_len(mscs_ie)) <= max_ie_len) {
1941 wpa_hexdump_buf(MSG_MSGDUMP, "MSCS IE", mscs_ie);
1942 mscs_ie_len = wpabuf_len(mscs_ie);
1943 os_memcpy(wpa_s->sme.assoc_req_ie + *wpa_ie_len,
1944 wpabuf_head(mscs_ie), mscs_ie_len);
1945 *wpa_ie_len += mscs_ie_len;
1946 }
1947
1948 wpabuf_free(mscs_ie);
1949 }
1950 mscs_fail:
1951
1952 if (ssid && ssid->multi_ap_backhaul_sta) {
1953 size_t multi_ap_ie_len;
1954
1955 multi_ap_ie_len = add_multi_ap_ie(
1956 wpa_s->sme.assoc_req_ie + wpa_s->sme.assoc_req_ie_len,
1957 sizeof(wpa_s->sme.assoc_req_ie) -
1958 wpa_s->sme.assoc_req_ie_len,
1959 MULTI_AP_BACKHAUL_STA);
1960 if (multi_ap_ie_len == 0) {
1961 wpa_printf(MSG_ERROR,
1962 "Multi-AP: Failed to build Multi-AP IE");
1963 return;
1964 }
1965 wpa_s->sme.assoc_req_ie_len += multi_ap_ie_len;
1966 }
1967
1968 params.bssid = bssid;
1969 params.ssid = wpa_s->sme.ssid;
1970 params.ssid_len = wpa_s->sme.ssid_len;
1971 params.freq.freq = wpa_s->sme.freq;
1972 params.bg_scan_period = ssid ? ssid->bg_scan_period : -1;
1973 params.wpa_ie = wpa_s->sme.assoc_req_ie_len ?
1974 wpa_s->sme.assoc_req_ie : NULL;
1975 params.wpa_ie_len = wpa_s->sme.assoc_req_ie_len;
1976 wpa_hexdump(MSG_DEBUG, "SME: Association Request IEs",
1977 params.wpa_ie, params.wpa_ie_len);
1978 params.pairwise_suite = wpa_s->pairwise_cipher;
1979 params.group_suite = wpa_s->group_cipher;
1980 params.mgmt_group_suite = wpa_s->mgmt_group_cipher;
1981 params.key_mgmt_suite = wpa_s->key_mgmt;
1982 params.wpa_proto = wpa_s->wpa_proto;
1983 #ifdef CONFIG_HT_OVERRIDES
1984 os_memset(&htcaps, 0, sizeof(htcaps));
1985 os_memset(&htcaps_mask, 0, sizeof(htcaps_mask));
1986 params.htcaps = (u8 *) &htcaps;
1987 params.htcaps_mask = (u8 *) &htcaps_mask;
1988 wpa_supplicant_apply_ht_overrides(wpa_s, ssid, ¶ms);
1989 #endif /* CONFIG_HT_OVERRIDES */
1990 #ifdef CONFIG_VHT_OVERRIDES
1991 os_memset(&vhtcaps, 0, sizeof(vhtcaps));
1992 os_memset(&vhtcaps_mask, 0, sizeof(vhtcaps_mask));
1993 params.vhtcaps = &vhtcaps;
1994 params.vhtcaps_mask = &vhtcaps_mask;
1995 wpa_supplicant_apply_vht_overrides(wpa_s, ssid, ¶ms);
1996 #endif /* CONFIG_VHT_OVERRIDES */
1997 #ifdef CONFIG_HE_OVERRIDES
1998 wpa_supplicant_apply_he_overrides(wpa_s, ssid, ¶ms);
1999 #endif /* CONFIG_HE_OVERRIDES */
2000 #ifdef CONFIG_IEEE80211R
2001 if (auth_type == WLAN_AUTH_FT && wpa_s->sme.ft_ies &&
2002 get_ie(wpa_s->sme.ft_ies, wpa_s->sme.ft_ies_len,
2003 WLAN_EID_RIC_DATA)) {
2004 /* There seems to be a pretty inconvenient bug in the Linux
2005 * kernel IE splitting functionality when RIC is used. For now,
2006 * skip correct behavior in IE construction here (i.e., drop the
2007 * additional non-FT-specific IEs) to avoid kernel issues. This
2008 * is fine since RIC is used only for testing purposes in the
2009 * current implementation. */
2010 wpa_printf(MSG_INFO,
2011 "SME: Linux kernel workaround - do not try to include additional IEs with RIC");
2012 params.wpa_ie = wpa_s->sme.ft_ies;
2013 params.wpa_ie_len = wpa_s->sme.ft_ies_len;
2014 } else if (auth_type == WLAN_AUTH_FT && wpa_s->sme.ft_ies) {
2015 const u8 *rm_en, *pos, *end;
2016 size_t rm_en_len = 0;
2017 u8 *rm_en_dup = NULL, *wpos;
2018
2019 /* Remove RSNE, MDE, FTE to allow them to be overridden with
2020 * FT specific values */
2021 remove_ie(wpa_s->sme.assoc_req_ie,
2022 &wpa_s->sme.assoc_req_ie_len,
2023 WLAN_EID_RSN);
2024 remove_ie(wpa_s->sme.assoc_req_ie,
2025 &wpa_s->sme.assoc_req_ie_len,
2026 WLAN_EID_MOBILITY_DOMAIN);
2027 remove_ie(wpa_s->sme.assoc_req_ie,
2028 &wpa_s->sme.assoc_req_ie_len,
2029 WLAN_EID_FAST_BSS_TRANSITION);
2030 rm_en = get_ie(wpa_s->sme.assoc_req_ie,
2031 wpa_s->sme.assoc_req_ie_len,
2032 WLAN_EID_RRM_ENABLED_CAPABILITIES);
2033 if (rm_en) {
2034 /* Need to remove RM Enabled Capabilities element as
2035 * well temporarily, so that it can be placed between
2036 * RSNE and MDE. */
2037 rm_en_len = 2 + rm_en[1];
2038 rm_en_dup = os_memdup(rm_en, rm_en_len);
2039 remove_ie(wpa_s->sme.assoc_req_ie,
2040 &wpa_s->sme.assoc_req_ie_len,
2041 WLAN_EID_RRM_ENABLED_CAPABILITIES);
2042 }
2043 wpa_hexdump(MSG_DEBUG,
2044 "SME: Association Request IEs after FT IE removal",
2045 wpa_s->sme.assoc_req_ie,
2046 wpa_s->sme.assoc_req_ie_len);
2047 if (wpa_s->sme.assoc_req_ie_len + wpa_s->sme.ft_ies_len +
2048 rm_en_len > sizeof(wpa_s->sme.assoc_req_ie)) {
2049 wpa_printf(MSG_ERROR,
2050 "SME: Not enough buffer room for FT IEs in Association Request frame");
2051 os_free(rm_en_dup);
2052 return;
2053 }
2054
2055 os_memmove(wpa_s->sme.assoc_req_ie + wpa_s->sme.ft_ies_len +
2056 rm_en_len,
2057 wpa_s->sme.assoc_req_ie,
2058 wpa_s->sme.assoc_req_ie_len);
2059 pos = wpa_s->sme.ft_ies;
2060 end = pos + wpa_s->sme.ft_ies_len;
2061 wpos = wpa_s->sme.assoc_req_ie;
2062 if (*pos == WLAN_EID_RSN) {
2063 os_memcpy(wpos, pos, 2 + pos[1]);
2064 wpos += 2 + pos[1];
2065 pos += 2 + pos[1];
2066 }
2067 if (rm_en_dup) {
2068 os_memcpy(wpos, rm_en_dup, rm_en_len);
2069 wpos += rm_en_len;
2070 os_free(rm_en_dup);
2071 }
2072 os_memcpy(wpos, pos, end - pos);
2073 wpa_s->sme.assoc_req_ie_len += wpa_s->sme.ft_ies_len +
2074 rm_en_len;
2075 params.wpa_ie = wpa_s->sme.assoc_req_ie;
2076 params.wpa_ie_len = wpa_s->sme.assoc_req_ie_len;
2077 wpa_hexdump(MSG_DEBUG,
2078 "SME: Association Request IEs after FT override",
2079 params.wpa_ie, params.wpa_ie_len);
2080 }
2081 #endif /* CONFIG_IEEE80211R */
2082 params.mode = mode;
2083 params.mgmt_frame_protection = wpa_s->sme.mfp;
2084 params.rrm_used = wpa_s->rrm.rrm_used;
2085 if (wpa_s->sme.prev_bssid_set)
2086 params.prev_bssid = wpa_s->sme.prev_bssid;
2087
2088 wpa_msg(wpa_s, MSG_INFO, "Trying to associate with " MACSTR
2089 " (SSID='%s' freq=%d MHz)", MAC2STR(params.bssid),
2090 params.ssid ? wpa_ssid_txt(params.ssid, params.ssid_len) : "",
2091 params.freq.freq);
2092
2093 wpa_supplicant_set_state(wpa_s, WPA_ASSOCIATING);
2094
2095 if (params.wpa_ie == NULL ||
2096 ieee802_11_parse_elems(params.wpa_ie, params.wpa_ie_len, &elems, 0)
2097 < 0) {
2098 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Could not parse own IEs?!");
2099 os_memset(&elems, 0, sizeof(elems));
2100 }
2101 if (elems.rsn_ie) {
2102 params.wpa_proto = WPA_PROTO_RSN;
2103 wpa_sm_set_assoc_wpa_ie(wpa_s->wpa, elems.rsn_ie - 2,
2104 elems.rsn_ie_len + 2);
2105 } else if (elems.wpa_ie) {
2106 params.wpa_proto = WPA_PROTO_WPA;
2107 wpa_sm_set_assoc_wpa_ie(wpa_s->wpa, elems.wpa_ie - 2,
2108 elems.wpa_ie_len + 2);
2109 } else if (elems.osen) {
2110 params.wpa_proto = WPA_PROTO_OSEN;
2111 wpa_sm_set_assoc_wpa_ie(wpa_s->wpa, elems.osen - 2,
2112 elems.osen_len + 2);
2113 } else
2114 wpa_sm_set_assoc_wpa_ie(wpa_s->wpa, NULL, 0);
2115 if (elems.rsnxe)
2116 wpa_sm_set_assoc_rsnxe(wpa_s->wpa, elems.rsnxe - 2,
2117 elems.rsnxe_len + 2);
2118 else
2119 wpa_sm_set_assoc_rsnxe(wpa_s->wpa, NULL, 0);
2120 if (ssid && ssid->p2p_group)
2121 params.p2p = 1;
2122
2123 if (wpa_s->p2pdev->set_sta_uapsd)
2124 params.uapsd = wpa_s->p2pdev->sta_uapsd;
2125 else
2126 params.uapsd = -1;
2127
2128 if (wpa_drv_associate(wpa_s, ¶ms) < 0) {
2129 wpa_msg(wpa_s, MSG_INFO, "SME: Association request to the "
2130 "driver failed");
2131 wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
2132 wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED);
2133 os_memset(wpa_s->pending_bssid, 0, ETH_ALEN);
2134 return;
2135 }
2136
2137 eloop_register_timeout(SME_ASSOC_TIMEOUT, 0, sme_assoc_timer, wpa_s,
2138 NULL);
2139
2140 #ifdef CONFIG_TESTING_OPTIONS
2141 wpabuf_free(wpa_s->last_assoc_req_wpa_ie);
2142 wpa_s->last_assoc_req_wpa_ie = NULL;
2143 if (params.wpa_ie)
2144 wpa_s->last_assoc_req_wpa_ie =
2145 wpabuf_alloc_copy(params.wpa_ie, params.wpa_ie_len);
2146 #endif /* CONFIG_TESTING_OPTIONS */
2147 }
2148
2149
sme_update_ft_ies(struct wpa_supplicant * wpa_s,const u8 * md,const u8 * ies,size_t ies_len)2150 int sme_update_ft_ies(struct wpa_supplicant *wpa_s, const u8 *md,
2151 const u8 *ies, size_t ies_len)
2152 {
2153 if (md == NULL || ies == NULL) {
2154 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Remove mobility domain");
2155 os_free(wpa_s->sme.ft_ies);
2156 wpa_s->sme.ft_ies = NULL;
2157 wpa_s->sme.ft_ies_len = 0;
2158 wpa_s->sme.ft_used = 0;
2159 return 0;
2160 }
2161
2162 os_memcpy(wpa_s->sme.mobility_domain, md, MOBILITY_DOMAIN_ID_LEN);
2163 wpa_hexdump(MSG_DEBUG, "SME: FT IEs", ies, ies_len);
2164 os_free(wpa_s->sme.ft_ies);
2165 wpa_s->sme.ft_ies = os_memdup(ies, ies_len);
2166 if (wpa_s->sme.ft_ies == NULL)
2167 return -1;
2168 wpa_s->sme.ft_ies_len = ies_len;
2169 return 0;
2170 }
2171
2172
sme_deauth(struct wpa_supplicant * wpa_s)2173 static void sme_deauth(struct wpa_supplicant *wpa_s)
2174 {
2175 int bssid_changed;
2176
2177 bssid_changed = !is_zero_ether_addr(wpa_s->bssid);
2178
2179 if (wpa_drv_deauthenticate(wpa_s, wpa_s->pending_bssid,
2180 WLAN_REASON_DEAUTH_LEAVING) < 0) {
2181 wpa_msg(wpa_s, MSG_INFO, "SME: Deauth request to the driver "
2182 "failed");
2183 }
2184 wpa_s->sme.prev_bssid_set = 0;
2185
2186 wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
2187 wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED);
2188 os_memset(wpa_s->bssid, 0, ETH_ALEN);
2189 os_memset(wpa_s->pending_bssid, 0, ETH_ALEN);
2190 if (bssid_changed)
2191 wpas_notify_bssid_changed(wpa_s);
2192 }
2193
2194
sme_event_assoc_reject(struct wpa_supplicant * wpa_s,union wpa_event_data * data)2195 void sme_event_assoc_reject(struct wpa_supplicant *wpa_s,
2196 union wpa_event_data *data)
2197 {
2198 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Association with " MACSTR " failed: "
2199 "status code %d", MAC2STR(wpa_s->pending_bssid),
2200 data->assoc_reject.status_code);
2201
2202 eloop_cancel_timeout(sme_assoc_timer, wpa_s, NULL);
2203
2204 #ifdef CONFIG_SAE
2205 if (wpa_s->sme.sae_pmksa_caching && wpa_s->current_ssid &&
2206 wpa_key_mgmt_sae(wpa_s->current_ssid->key_mgmt)) {
2207 wpa_dbg(wpa_s, MSG_DEBUG,
2208 "PMKSA caching attempt rejected - drop PMKSA cache entry and fall back to SAE authentication");
2209 wpa_sm_aborted_cached(wpa_s->wpa);
2210 wpa_sm_pmksa_cache_flush(wpa_s->wpa, wpa_s->current_ssid);
2211 if (wpa_s->current_bss) {
2212 struct wpa_bss *bss = wpa_s->current_bss;
2213 struct wpa_ssid *ssid = wpa_s->current_ssid;
2214
2215 wpa_drv_deauthenticate(wpa_s, wpa_s->pending_bssid,
2216 WLAN_REASON_DEAUTH_LEAVING);
2217 wpas_connect_work_done(wpa_s);
2218 wpa_supplicant_mark_disassoc(wpa_s);
2219 wpa_supplicant_connect(wpa_s, bss, ssid);
2220 return;
2221 }
2222 }
2223 #endif /* CONFIG_SAE */
2224
2225 /*
2226 * For now, unconditionally terminate the previous authentication. In
2227 * theory, this should not be needed, but mac80211 gets quite confused
2228 * if the authentication is left pending.. Some roaming cases might
2229 * benefit from using the previous authentication, so this could be
2230 * optimized in the future.
2231 */
2232 sme_deauth(wpa_s);
2233 }
2234
2235
sme_event_auth_timed_out(struct wpa_supplicant * wpa_s,union wpa_event_data * data)2236 void sme_event_auth_timed_out(struct wpa_supplicant *wpa_s,
2237 union wpa_event_data *data)
2238 {
2239 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Authentication timed out");
2240 wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
2241 wpa_supplicant_mark_disassoc(wpa_s);
2242 }
2243
2244
sme_event_assoc_timed_out(struct wpa_supplicant * wpa_s,union wpa_event_data * data)2245 void sme_event_assoc_timed_out(struct wpa_supplicant *wpa_s,
2246 union wpa_event_data *data)
2247 {
2248 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Association timed out");
2249 wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
2250 wpa_supplicant_mark_disassoc(wpa_s);
2251 }
2252
2253
sme_event_disassoc(struct wpa_supplicant * wpa_s,struct disassoc_info * info)2254 void sme_event_disassoc(struct wpa_supplicant *wpa_s,
2255 struct disassoc_info *info)
2256 {
2257 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Disassociation event received");
2258 if (wpa_s->sme.prev_bssid_set) {
2259 /*
2260 * cfg80211/mac80211 can get into somewhat confused state if
2261 * the AP only disassociates us and leaves us in authenticated
2262 * state. For now, force the state to be cleared to avoid
2263 * confusing errors if we try to associate with the AP again.
2264 */
2265 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Deauthenticate to clear "
2266 "driver state");
2267 wpa_drv_deauthenticate(wpa_s, wpa_s->sme.prev_bssid,
2268 WLAN_REASON_DEAUTH_LEAVING);
2269 }
2270 }
2271
2272
sme_auth_timer(void * eloop_ctx,void * timeout_ctx)2273 static void sme_auth_timer(void *eloop_ctx, void *timeout_ctx)
2274 {
2275 struct wpa_supplicant *wpa_s = eloop_ctx;
2276 if (wpa_s->wpa_state == WPA_AUTHENTICATING) {
2277 wpa_msg(wpa_s, MSG_DEBUG, "SME: Authentication timeout");
2278 sme_deauth(wpa_s);
2279 }
2280 }
2281
2282
sme_assoc_timer(void * eloop_ctx,void * timeout_ctx)2283 static void sme_assoc_timer(void *eloop_ctx, void *timeout_ctx)
2284 {
2285 struct wpa_supplicant *wpa_s = eloop_ctx;
2286 if (wpa_s->wpa_state == WPA_ASSOCIATING) {
2287 wpa_msg(wpa_s, MSG_DEBUG, "SME: Association timeout");
2288 sme_deauth(wpa_s);
2289 }
2290 }
2291
2292
sme_state_changed(struct wpa_supplicant * wpa_s)2293 void sme_state_changed(struct wpa_supplicant *wpa_s)
2294 {
2295 /* Make sure timers are cleaned up appropriately. */
2296 if (wpa_s->wpa_state != WPA_ASSOCIATING)
2297 eloop_cancel_timeout(sme_assoc_timer, wpa_s, NULL);
2298 if (wpa_s->wpa_state != WPA_AUTHENTICATING)
2299 eloop_cancel_timeout(sme_auth_timer, wpa_s, NULL);
2300 }
2301
2302
sme_disassoc_while_authenticating(struct wpa_supplicant * wpa_s,const u8 * prev_pending_bssid)2303 void sme_disassoc_while_authenticating(struct wpa_supplicant *wpa_s,
2304 const u8 *prev_pending_bssid)
2305 {
2306 /*
2307 * mac80211-workaround to force deauth on failed auth cmd,
2308 * requires us to remain in authenticating state to allow the
2309 * second authentication attempt to be continued properly.
2310 */
2311 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Allow pending authentication "
2312 "to proceed after disconnection event");
2313 wpa_supplicant_set_state(wpa_s, WPA_AUTHENTICATING);
2314 os_memcpy(wpa_s->pending_bssid, prev_pending_bssid, ETH_ALEN);
2315
2316 /*
2317 * Re-arm authentication timer in case auth fails for whatever reason.
2318 */
2319 eloop_cancel_timeout(sme_auth_timer, wpa_s, NULL);
2320 eloop_register_timeout(SME_AUTH_TIMEOUT, 0, sme_auth_timer, wpa_s,
2321 NULL);
2322 }
2323
2324
sme_clear_on_disassoc(struct wpa_supplicant * wpa_s)2325 void sme_clear_on_disassoc(struct wpa_supplicant *wpa_s)
2326 {
2327 wpa_s->sme.prev_bssid_set = 0;
2328 #ifdef CONFIG_SAE
2329 wpabuf_free(wpa_s->sme.sae_token);
2330 wpa_s->sme.sae_token = NULL;
2331 sae_clear_data(&wpa_s->sme.sae);
2332 #endif /* CONFIG_SAE */
2333 #ifdef CONFIG_IEEE80211R
2334 if (wpa_s->sme.ft_ies || wpa_s->sme.ft_used)
2335 sme_update_ft_ies(wpa_s, NULL, NULL, 0);
2336 #endif /* CONFIG_IEEE80211R */
2337 sme_stop_sa_query(wpa_s);
2338 }
2339
2340
sme_deinit(struct wpa_supplicant * wpa_s)2341 void sme_deinit(struct wpa_supplicant *wpa_s)
2342 {
2343 sme_clear_on_disassoc(wpa_s);
2344 #ifdef CONFIG_SAE
2345 os_free(wpa_s->sme.sae_rejected_groups);
2346 wpa_s->sme.sae_rejected_groups = NULL;
2347 #endif /* CONFIG_SAE */
2348
2349 eloop_cancel_timeout(sme_assoc_timer, wpa_s, NULL);
2350 eloop_cancel_timeout(sme_auth_timer, wpa_s, NULL);
2351 eloop_cancel_timeout(sme_obss_scan_timeout, wpa_s, NULL);
2352 }
2353
2354
sme_send_2040_bss_coex(struct wpa_supplicant * wpa_s,const u8 * chan_list,u8 num_channels,u8 num_intol)2355 static void sme_send_2040_bss_coex(struct wpa_supplicant *wpa_s,
2356 const u8 *chan_list, u8 num_channels,
2357 u8 num_intol)
2358 {
2359 struct ieee80211_2040_bss_coex_ie *bc_ie;
2360 struct ieee80211_2040_intol_chan_report *ic_report;
2361 struct wpabuf *buf;
2362
2363 wpa_printf(MSG_DEBUG, "SME: Send 20/40 BSS Coexistence to " MACSTR
2364 " (num_channels=%u num_intol=%u)",
2365 MAC2STR(wpa_s->bssid), num_channels, num_intol);
2366 wpa_hexdump(MSG_DEBUG, "SME: 20/40 BSS Intolerant Channels",
2367 chan_list, num_channels);
2368
2369 buf = wpabuf_alloc(2 + /* action.category + action_code */
2370 sizeof(struct ieee80211_2040_bss_coex_ie) +
2371 sizeof(struct ieee80211_2040_intol_chan_report) +
2372 num_channels);
2373 if (buf == NULL)
2374 return;
2375
2376 wpabuf_put_u8(buf, WLAN_ACTION_PUBLIC);
2377 wpabuf_put_u8(buf, WLAN_PA_20_40_BSS_COEX);
2378
2379 bc_ie = wpabuf_put(buf, sizeof(*bc_ie));
2380 bc_ie->element_id = WLAN_EID_20_40_BSS_COEXISTENCE;
2381 bc_ie->length = 1;
2382 if (num_intol)
2383 bc_ie->coex_param |= WLAN_20_40_BSS_COEX_20MHZ_WIDTH_REQ;
2384
2385 if (num_channels > 0) {
2386 ic_report = wpabuf_put(buf, sizeof(*ic_report));
2387 ic_report->element_id = WLAN_EID_20_40_BSS_INTOLERANT;
2388 ic_report->length = num_channels + 1;
2389 ic_report->op_class = 0;
2390 os_memcpy(wpabuf_put(buf, num_channels), chan_list,
2391 num_channels);
2392 }
2393
2394 if (wpa_drv_send_action(wpa_s, wpa_s->assoc_freq, 0, wpa_s->bssid,
2395 wpa_s->own_addr, wpa_s->bssid,
2396 wpabuf_head(buf), wpabuf_len(buf), 0) < 0) {
2397 wpa_msg(wpa_s, MSG_INFO,
2398 "SME: Failed to send 20/40 BSS Coexistence frame");
2399 }
2400
2401 wpabuf_free(buf);
2402 }
2403
2404
sme_proc_obss_scan(struct wpa_supplicant * wpa_s)2405 int sme_proc_obss_scan(struct wpa_supplicant *wpa_s)
2406 {
2407 struct wpa_bss *bss;
2408 const u8 *ie;
2409 u16 ht_cap;
2410 u8 chan_list[P2P_MAX_CHANNELS], channel;
2411 u8 num_channels = 0, num_intol = 0, i;
2412
2413 if (!wpa_s->sme.sched_obss_scan)
2414 return 0;
2415
2416 wpa_s->sme.sched_obss_scan = 0;
2417 if (!wpa_s->current_bss || wpa_s->wpa_state != WPA_COMPLETED)
2418 return 1;
2419
2420 /*
2421 * Check whether AP uses regulatory triplet or channel triplet in
2422 * country info. Right now the operating class of the BSS channel
2423 * width trigger event is "unknown" (IEEE Std 802.11-2012 10.15.12),
2424 * based on the assumption that operating class triplet is not used in
2425 * beacon frame. If the First Channel Number/Operating Extension
2426 * Identifier octet has a positive integer value of 201 or greater,
2427 * then its operating class triplet.
2428 *
2429 * TODO: If Supported Operating Classes element is present in beacon
2430 * frame, have to lookup operating class in Annex E and fill them in
2431 * 2040 coex frame.
2432 */
2433 ie = wpa_bss_get_ie(wpa_s->current_bss, WLAN_EID_COUNTRY);
2434 if (ie && (ie[1] >= 6) && (ie[5] >= 201))
2435 return 1;
2436
2437 os_memset(chan_list, 0, sizeof(chan_list));
2438
2439 dl_list_for_each(bss, &wpa_s->bss, struct wpa_bss, list) {
2440 /* Skip other band bss */
2441 enum hostapd_hw_mode mode;
2442 mode = ieee80211_freq_to_chan(bss->freq, &channel);
2443 if (mode != HOSTAPD_MODE_IEEE80211G &&
2444 mode != HOSTAPD_MODE_IEEE80211B)
2445 continue;
2446
2447 ie = wpa_bss_get_ie(bss, WLAN_EID_HT_CAP);
2448 ht_cap = (ie && (ie[1] == 26)) ? WPA_GET_LE16(ie + 2) : 0;
2449 wpa_printf(MSG_DEBUG, "SME OBSS scan BSS " MACSTR
2450 " freq=%u chan=%u ht_cap=0x%x",
2451 MAC2STR(bss->bssid), bss->freq, channel, ht_cap);
2452
2453 if (!ht_cap || (ht_cap & HT_CAP_INFO_40MHZ_INTOLERANT)) {
2454 if (ht_cap & HT_CAP_INFO_40MHZ_INTOLERANT)
2455 num_intol++;
2456
2457 /* Check whether the channel is already considered */
2458 for (i = 0; i < num_channels; i++) {
2459 if (channel == chan_list[i])
2460 break;
2461 }
2462 if (i != num_channels)
2463 continue;
2464
2465 chan_list[num_channels++] = channel;
2466 }
2467 }
2468
2469 sme_send_2040_bss_coex(wpa_s, chan_list, num_channels, num_intol);
2470 return 1;
2471 }
2472
2473
wpa_obss_scan_freqs_list(struct wpa_supplicant * wpa_s,struct wpa_driver_scan_params * params)2474 static void wpa_obss_scan_freqs_list(struct wpa_supplicant *wpa_s,
2475 struct wpa_driver_scan_params *params)
2476 {
2477 /* Include only affected channels */
2478 struct hostapd_hw_modes *mode;
2479 int count, i;
2480 int start, end;
2481
2482 mode = get_mode(wpa_s->hw.modes, wpa_s->hw.num_modes,
2483 HOSTAPD_MODE_IEEE80211G, false);
2484 if (mode == NULL) {
2485 /* No channels supported in this band - use empty list */
2486 params->freqs = os_zalloc(sizeof(int));
2487 return;
2488 }
2489
2490 if (wpa_s->sme.ht_sec_chan == HT_SEC_CHAN_UNKNOWN &&
2491 wpa_s->current_bss) {
2492 const u8 *ie;
2493
2494 ie = wpa_bss_get_ie(wpa_s->current_bss, WLAN_EID_HT_OPERATION);
2495 if (ie && ie[1] >= 2) {
2496 u8 o;
2497
2498 o = ie[3] & HT_INFO_HT_PARAM_SECONDARY_CHNL_OFF_MASK;
2499 if (o == HT_INFO_HT_PARAM_SECONDARY_CHNL_ABOVE)
2500 wpa_s->sme.ht_sec_chan = HT_SEC_CHAN_ABOVE;
2501 else if (o == HT_INFO_HT_PARAM_SECONDARY_CHNL_BELOW)
2502 wpa_s->sme.ht_sec_chan = HT_SEC_CHAN_BELOW;
2503 }
2504 }
2505
2506 start = wpa_s->assoc_freq - 10;
2507 end = wpa_s->assoc_freq + 10;
2508 switch (wpa_s->sme.ht_sec_chan) {
2509 case HT_SEC_CHAN_UNKNOWN:
2510 /* HT40+ possible on channels 1..9 */
2511 if (wpa_s->assoc_freq <= 2452)
2512 start -= 20;
2513 /* HT40- possible on channels 5-13 */
2514 if (wpa_s->assoc_freq >= 2432)
2515 end += 20;
2516 break;
2517 case HT_SEC_CHAN_ABOVE:
2518 end += 20;
2519 break;
2520 case HT_SEC_CHAN_BELOW:
2521 start -= 20;
2522 break;
2523 }
2524 wpa_printf(MSG_DEBUG,
2525 "OBSS: assoc_freq %d possible affected range %d-%d",
2526 wpa_s->assoc_freq, start, end);
2527
2528 params->freqs = os_calloc(mode->num_channels + 1, sizeof(int));
2529 if (params->freqs == NULL)
2530 return;
2531 for (count = 0, i = 0; i < mode->num_channels; i++) {
2532 int freq;
2533
2534 if (mode->channels[i].flag & HOSTAPD_CHAN_DISABLED)
2535 continue;
2536 freq = mode->channels[i].freq;
2537 if (freq - 10 >= end || freq + 10 <= start)
2538 continue; /* not affected */
2539 params->freqs[count++] = freq;
2540 }
2541 }
2542
2543
sme_obss_scan_timeout(void * eloop_ctx,void * timeout_ctx)2544 static void sme_obss_scan_timeout(void *eloop_ctx, void *timeout_ctx)
2545 {
2546 struct wpa_supplicant *wpa_s = eloop_ctx;
2547 struct wpa_driver_scan_params params;
2548
2549 if (!wpa_s->current_bss) {
2550 wpa_printf(MSG_DEBUG, "SME OBSS: Ignore scan request");
2551 return;
2552 }
2553
2554 os_memset(¶ms, 0, sizeof(params));
2555 wpa_obss_scan_freqs_list(wpa_s, ¶ms);
2556 params.low_priority = 1;
2557 wpa_printf(MSG_DEBUG, "SME OBSS: Request an OBSS scan");
2558
2559 if (wpa_supplicant_trigger_scan(wpa_s, ¶ms))
2560 wpa_printf(MSG_DEBUG, "SME OBSS: Failed to trigger scan");
2561 else
2562 wpa_s->sme.sched_obss_scan = 1;
2563 os_free(params.freqs);
2564
2565 eloop_register_timeout(wpa_s->sme.obss_scan_int, 0,
2566 sme_obss_scan_timeout, wpa_s, NULL);
2567 }
2568
2569
sme_sched_obss_scan(struct wpa_supplicant * wpa_s,int enable)2570 void sme_sched_obss_scan(struct wpa_supplicant *wpa_s, int enable)
2571 {
2572 const u8 *ie;
2573 struct wpa_bss *bss = wpa_s->current_bss;
2574 struct wpa_ssid *ssid = wpa_s->current_ssid;
2575 struct hostapd_hw_modes *hw_mode = NULL;
2576 int i;
2577
2578 eloop_cancel_timeout(sme_obss_scan_timeout, wpa_s, NULL);
2579 wpa_s->sme.sched_obss_scan = 0;
2580 wpa_s->sme.ht_sec_chan = HT_SEC_CHAN_UNKNOWN;
2581 if (!enable)
2582 return;
2583
2584 /*
2585 * Schedule OBSS scan if driver is using station SME in wpa_supplicant
2586 * or it expects OBSS scan to be performed by wpa_supplicant.
2587 */
2588 if (!((wpa_s->drv_flags & WPA_DRIVER_FLAGS_SME) ||
2589 (wpa_s->drv_flags & WPA_DRIVER_FLAGS_OBSS_SCAN)) ||
2590 ssid == NULL || ssid->mode != WPAS_MODE_INFRA)
2591 return;
2592
2593 #ifdef CONFIG_HT_OVERRIDES
2594 /* No need for OBSS scan if HT40 is explicitly disabled */
2595 if (ssid->disable_ht40)
2596 return;
2597 #endif /* CONFIG_HT_OVERRIDES */
2598
2599 if (!wpa_s->hw.modes)
2600 return;
2601
2602 /* only HT caps in 11g mode are relevant */
2603 for (i = 0; i < wpa_s->hw.num_modes; i++) {
2604 hw_mode = &wpa_s->hw.modes[i];
2605 if (hw_mode->mode == HOSTAPD_MODE_IEEE80211G)
2606 break;
2607 }
2608
2609 /* Driver does not support HT40 for 11g or doesn't have 11g. */
2610 if (i == wpa_s->hw.num_modes || !hw_mode ||
2611 !(hw_mode->ht_capab & HT_CAP_INFO_SUPP_CHANNEL_WIDTH_SET))
2612 return;
2613
2614 if (bss == NULL || bss->freq < 2400 || bss->freq > 2500)
2615 return; /* Not associated on 2.4 GHz band */
2616
2617 /* Check whether AP supports HT40 */
2618 ie = wpa_bss_get_ie(wpa_s->current_bss, WLAN_EID_HT_CAP);
2619 if (!ie || ie[1] < 2 ||
2620 !(WPA_GET_LE16(ie + 2) & HT_CAP_INFO_SUPP_CHANNEL_WIDTH_SET))
2621 return; /* AP does not support HT40 */
2622
2623 ie = wpa_bss_get_ie(wpa_s->current_bss,
2624 WLAN_EID_OVERLAPPING_BSS_SCAN_PARAMS);
2625 if (!ie || ie[1] < 14)
2626 return; /* AP does not request OBSS scans */
2627
2628 wpa_s->sme.obss_scan_int = WPA_GET_LE16(ie + 6);
2629 if (wpa_s->sme.obss_scan_int < 10) {
2630 wpa_printf(MSG_DEBUG, "SME: Invalid OBSS Scan Interval %u "
2631 "replaced with the minimum 10 sec",
2632 wpa_s->sme.obss_scan_int);
2633 wpa_s->sme.obss_scan_int = 10;
2634 }
2635 wpa_printf(MSG_DEBUG, "SME: OBSS Scan Interval %u sec",
2636 wpa_s->sme.obss_scan_int);
2637 eloop_register_timeout(wpa_s->sme.obss_scan_int, 0,
2638 sme_obss_scan_timeout, wpa_s, NULL);
2639 }
2640
2641
2642 static const unsigned int sa_query_max_timeout = 1000;
2643 static const unsigned int sa_query_retry_timeout = 201;
2644 static const unsigned int sa_query_ch_switch_max_delay = 5000; /* in usec */
2645
sme_check_sa_query_timeout(struct wpa_supplicant * wpa_s)2646 static int sme_check_sa_query_timeout(struct wpa_supplicant *wpa_s)
2647 {
2648 u32 tu;
2649 struct os_reltime now, passed;
2650 os_get_reltime(&now);
2651 os_reltime_sub(&now, &wpa_s->sme.sa_query_start, &passed);
2652 tu = (passed.sec * 1000000 + passed.usec) / 1024;
2653 if (sa_query_max_timeout < tu) {
2654 wpa_dbg(wpa_s, MSG_DEBUG, "SME: SA Query timed out");
2655 sme_stop_sa_query(wpa_s);
2656 wpa_supplicant_deauthenticate(
2657 wpa_s, WLAN_REASON_PREV_AUTH_NOT_VALID);
2658 return 1;
2659 }
2660
2661 return 0;
2662 }
2663
2664
sme_send_sa_query_req(struct wpa_supplicant * wpa_s,const u8 * trans_id)2665 static void sme_send_sa_query_req(struct wpa_supplicant *wpa_s,
2666 const u8 *trans_id)
2667 {
2668 u8 req[2 + WLAN_SA_QUERY_TR_ID_LEN + OCV_OCI_EXTENDED_LEN];
2669 u8 req_len = 2 + WLAN_SA_QUERY_TR_ID_LEN;
2670
2671 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Sending SA Query Request to "
2672 MACSTR, MAC2STR(wpa_s->bssid));
2673 wpa_hexdump(MSG_DEBUG, "SME: SA Query Transaction ID",
2674 trans_id, WLAN_SA_QUERY_TR_ID_LEN);
2675 req[0] = WLAN_ACTION_SA_QUERY;
2676 req[1] = WLAN_SA_QUERY_REQUEST;
2677 os_memcpy(req + 2, trans_id, WLAN_SA_QUERY_TR_ID_LEN);
2678
2679 #ifdef CONFIG_OCV
2680 if (wpa_sm_ocv_enabled(wpa_s->wpa)) {
2681 struct wpa_channel_info ci;
2682
2683 if (wpa_drv_channel_info(wpa_s, &ci) != 0) {
2684 wpa_printf(MSG_WARNING,
2685 "Failed to get channel info for OCI element in SA Query Request frame");
2686 return;
2687 }
2688
2689 #ifdef CONFIG_TESTING_OPTIONS
2690 if (wpa_s->oci_freq_override_saquery_req) {
2691 wpa_printf(MSG_INFO,
2692 "TEST: Override SA Query Request OCI frequency %d -> %d MHz",
2693 ci.frequency,
2694 wpa_s->oci_freq_override_saquery_req);
2695 ci.frequency = wpa_s->oci_freq_override_saquery_req;
2696 }
2697 #endif /* CONFIG_TESTING_OPTIONS */
2698
2699 if (ocv_insert_extended_oci(&ci, req + req_len) < 0)
2700 return;
2701
2702 req_len += OCV_OCI_EXTENDED_LEN;
2703 }
2704 #endif /* CONFIG_OCV */
2705
2706 if (wpa_drv_send_action(wpa_s, wpa_s->assoc_freq, 0, wpa_s->bssid,
2707 wpa_s->own_addr, wpa_s->bssid,
2708 req, req_len, 0) < 0)
2709 wpa_msg(wpa_s, MSG_INFO, "SME: Failed to send SA Query "
2710 "Request");
2711 }
2712
2713
sme_sa_query_timer(void * eloop_ctx,void * timeout_ctx)2714 static void sme_sa_query_timer(void *eloop_ctx, void *timeout_ctx)
2715 {
2716 struct wpa_supplicant *wpa_s = eloop_ctx;
2717 unsigned int timeout, sec, usec;
2718 u8 *trans_id, *nbuf;
2719
2720 if (wpa_s->sme.sa_query_count > 0 &&
2721 sme_check_sa_query_timeout(wpa_s))
2722 return;
2723
2724 nbuf = os_realloc_array(wpa_s->sme.sa_query_trans_id,
2725 wpa_s->sme.sa_query_count + 1,
2726 WLAN_SA_QUERY_TR_ID_LEN);
2727 if (nbuf == NULL) {
2728 sme_stop_sa_query(wpa_s);
2729 return;
2730 }
2731 if (wpa_s->sme.sa_query_count == 0) {
2732 /* Starting a new SA Query procedure */
2733 os_get_reltime(&wpa_s->sme.sa_query_start);
2734 }
2735 trans_id = nbuf + wpa_s->sme.sa_query_count * WLAN_SA_QUERY_TR_ID_LEN;
2736 wpa_s->sme.sa_query_trans_id = nbuf;
2737 wpa_s->sme.sa_query_count++;
2738
2739 if (os_get_random(trans_id, WLAN_SA_QUERY_TR_ID_LEN) < 0) {
2740 wpa_printf(MSG_DEBUG, "Could not generate SA Query ID");
2741 sme_stop_sa_query(wpa_s);
2742 return;
2743 }
2744
2745 timeout = sa_query_retry_timeout;
2746 sec = ((timeout / 1000) * 1024) / 1000;
2747 usec = (timeout % 1000) * 1024;
2748 eloop_register_timeout(sec, usec, sme_sa_query_timer, wpa_s, NULL);
2749
2750 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Association SA Query attempt %d",
2751 wpa_s->sme.sa_query_count);
2752
2753 sme_send_sa_query_req(wpa_s, trans_id);
2754 }
2755
2756
sme_start_sa_query(struct wpa_supplicant * wpa_s)2757 static void sme_start_sa_query(struct wpa_supplicant *wpa_s)
2758 {
2759 sme_sa_query_timer(wpa_s, NULL);
2760 }
2761
2762
sme_stop_sa_query(struct wpa_supplicant * wpa_s)2763 static void sme_stop_sa_query(struct wpa_supplicant *wpa_s)
2764 {
2765 if (wpa_s->sme.sa_query_trans_id)
2766 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Stop SA Query");
2767 eloop_cancel_timeout(sme_sa_query_timer, wpa_s, NULL);
2768 os_free(wpa_s->sme.sa_query_trans_id);
2769 wpa_s->sme.sa_query_trans_id = NULL;
2770 wpa_s->sme.sa_query_count = 0;
2771 }
2772
2773
sme_event_unprot_disconnect(struct wpa_supplicant * wpa_s,const u8 * sa,const u8 * da,u16 reason_code)2774 void sme_event_unprot_disconnect(struct wpa_supplicant *wpa_s, const u8 *sa,
2775 const u8 *da, u16 reason_code)
2776 {
2777 struct wpa_ssid *ssid;
2778 struct os_reltime now;
2779
2780 if (wpa_s->wpa_state != WPA_COMPLETED)
2781 return;
2782 ssid = wpa_s->current_ssid;
2783 if (wpas_get_ssid_pmf(wpa_s, ssid) == NO_MGMT_FRAME_PROTECTION)
2784 return;
2785 if (os_memcmp(sa, wpa_s->bssid, ETH_ALEN) != 0)
2786 return;
2787 if (reason_code != WLAN_REASON_CLASS2_FRAME_FROM_NONAUTH_STA &&
2788 reason_code != WLAN_REASON_CLASS3_FRAME_FROM_NONASSOC_STA)
2789 return;
2790 if (wpa_s->sme.sa_query_count > 0)
2791 return;
2792 #ifdef CONFIG_TESTING_OPTIONS
2793 if (wpa_s->disable_sa_query)
2794 return;
2795 #endif /* CONFIG_TESTING_OPTIONS */
2796
2797 os_get_reltime(&now);
2798 if (wpa_s->sme.last_unprot_disconnect.sec &&
2799 !os_reltime_expired(&now, &wpa_s->sme.last_unprot_disconnect, 10))
2800 return; /* limit SA Query procedure frequency */
2801 wpa_s->sme.last_unprot_disconnect = now;
2802
2803 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Unprotected disconnect dropped - "
2804 "possible AP/STA state mismatch - trigger SA Query");
2805 sme_start_sa_query(wpa_s);
2806 }
2807
2808
sme_event_ch_switch(struct wpa_supplicant * wpa_s)2809 void sme_event_ch_switch(struct wpa_supplicant *wpa_s)
2810 {
2811 unsigned int usec;
2812 u32 _rand;
2813
2814 if (wpa_s->wpa_state != WPA_COMPLETED ||
2815 !wpa_sm_ocv_enabled(wpa_s->wpa))
2816 return;
2817
2818 wpa_dbg(wpa_s, MSG_DEBUG,
2819 "SME: Channel switch completed - trigger new SA Query to verify new operating channel");
2820 sme_stop_sa_query(wpa_s);
2821
2822 if (os_get_random((u8 *) &_rand, sizeof(_rand)) < 0)
2823 _rand = os_random();
2824 usec = _rand % (sa_query_ch_switch_max_delay + 1);
2825 eloop_register_timeout(0, usec, sme_sa_query_timer, wpa_s, NULL);
2826 }
2827
2828
sme_process_sa_query_request(struct wpa_supplicant * wpa_s,const u8 * sa,const u8 * data,size_t len)2829 static void sme_process_sa_query_request(struct wpa_supplicant *wpa_s,
2830 const u8 *sa, const u8 *data,
2831 size_t len)
2832 {
2833 u8 resp[2 + WLAN_SA_QUERY_TR_ID_LEN + OCV_OCI_EXTENDED_LEN];
2834 u8 resp_len = 2 + WLAN_SA_QUERY_TR_ID_LEN;
2835
2836 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Sending SA Query Response to "
2837 MACSTR, MAC2STR(wpa_s->bssid));
2838
2839 resp[0] = WLAN_ACTION_SA_QUERY;
2840 resp[1] = WLAN_SA_QUERY_RESPONSE;
2841 os_memcpy(resp + 2, data + 1, WLAN_SA_QUERY_TR_ID_LEN);
2842
2843 #ifdef CONFIG_OCV
2844 if (wpa_sm_ocv_enabled(wpa_s->wpa)) {
2845 struct wpa_channel_info ci;
2846
2847 if (wpa_drv_channel_info(wpa_s, &ci) != 0) {
2848 wpa_printf(MSG_WARNING,
2849 "Failed to get channel info for OCI element in SA Query Response frame");
2850 return;
2851 }
2852
2853 #ifdef CONFIG_TESTING_OPTIONS
2854 if (wpa_s->oci_freq_override_saquery_resp) {
2855 wpa_printf(MSG_INFO,
2856 "TEST: Override SA Query Response OCI frequency %d -> %d MHz",
2857 ci.frequency,
2858 wpa_s->oci_freq_override_saquery_resp);
2859 ci.frequency = wpa_s->oci_freq_override_saquery_resp;
2860 }
2861 #endif /* CONFIG_TESTING_OPTIONS */
2862
2863 if (ocv_insert_extended_oci(&ci, resp + resp_len) < 0)
2864 return;
2865
2866 resp_len += OCV_OCI_EXTENDED_LEN;
2867 }
2868 #endif /* CONFIG_OCV */
2869
2870 if (wpa_drv_send_action(wpa_s, wpa_s->assoc_freq, 0, wpa_s->bssid,
2871 wpa_s->own_addr, wpa_s->bssid,
2872 resp, resp_len, 0) < 0)
2873 wpa_msg(wpa_s, MSG_INFO,
2874 "SME: Failed to send SA Query Response");
2875 }
2876
2877
sme_process_sa_query_response(struct wpa_supplicant * wpa_s,const u8 * sa,const u8 * data,size_t len)2878 static void sme_process_sa_query_response(struct wpa_supplicant *wpa_s,
2879 const u8 *sa, const u8 *data,
2880 size_t len)
2881 {
2882 int i;
2883
2884 if (!wpa_s->sme.sa_query_trans_id)
2885 return;
2886
2887 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Received SA Query response from "
2888 MACSTR " (trans_id %02x%02x)", MAC2STR(sa), data[1], data[2]);
2889
2890 if (os_memcmp(sa, wpa_s->bssid, ETH_ALEN) != 0)
2891 return;
2892
2893 for (i = 0; i < wpa_s->sme.sa_query_count; i++) {
2894 if (os_memcmp(wpa_s->sme.sa_query_trans_id +
2895 i * WLAN_SA_QUERY_TR_ID_LEN,
2896 data + 1, WLAN_SA_QUERY_TR_ID_LEN) == 0)
2897 break;
2898 }
2899
2900 if (i >= wpa_s->sme.sa_query_count) {
2901 wpa_dbg(wpa_s, MSG_DEBUG, "SME: No matching SA Query "
2902 "transaction identifier found");
2903 return;
2904 }
2905
2906 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Reply to pending SA Query received "
2907 "from " MACSTR, MAC2STR(sa));
2908 sme_stop_sa_query(wpa_s);
2909 }
2910
2911
sme_sa_query_rx(struct wpa_supplicant * wpa_s,const u8 * da,const u8 * sa,const u8 * data,size_t len)2912 void sme_sa_query_rx(struct wpa_supplicant *wpa_s, const u8 *da, const u8 *sa,
2913 const u8 *data, size_t len)
2914 {
2915 if (len < 1 + WLAN_SA_QUERY_TR_ID_LEN)
2916 return;
2917 if (is_multicast_ether_addr(da)) {
2918 wpa_printf(MSG_DEBUG,
2919 "IEEE 802.11: Ignore group-addressed SA Query frame (A1=" MACSTR " A2=" MACSTR ")",
2920 MAC2STR(da), MAC2STR(sa));
2921 return;
2922 }
2923
2924 wpa_dbg(wpa_s, MSG_DEBUG, "SME: Received SA Query frame from "
2925 MACSTR " (trans_id %02x%02x)", MAC2STR(sa), data[1], data[2]);
2926
2927 #ifdef CONFIG_OCV
2928 if (wpa_sm_ocv_enabled(wpa_s->wpa)) {
2929 struct ieee802_11_elems elems;
2930 struct wpa_channel_info ci;
2931
2932 if (ieee802_11_parse_elems(data + 1 + WLAN_SA_QUERY_TR_ID_LEN,
2933 len - 1 - WLAN_SA_QUERY_TR_ID_LEN,
2934 &elems, 1) == ParseFailed) {
2935 wpa_printf(MSG_DEBUG,
2936 "SA Query: Failed to parse elements");
2937 return;
2938 }
2939
2940 if (wpa_drv_channel_info(wpa_s, &ci) != 0) {
2941 wpa_printf(MSG_WARNING,
2942 "Failed to get channel info to validate received OCI in SA Query Action frame");
2943 return;
2944 }
2945
2946 if (ocv_verify_tx_params(elems.oci, elems.oci_len, &ci,
2947 channel_width_to_int(ci.chanwidth),
2948 ci.seg1_idx) != OCI_SUCCESS) {
2949 wpa_msg(wpa_s, MSG_INFO, OCV_FAILURE "addr=" MACSTR
2950 " frame=saquery%s error=%s",
2951 MAC2STR(sa), data[0] == WLAN_SA_QUERY_REQUEST ?
2952 "req" : "resp", ocv_errorstr);
2953 return;
2954 }
2955 }
2956 #endif /* CONFIG_OCV */
2957
2958 if (data[0] == WLAN_SA_QUERY_REQUEST)
2959 sme_process_sa_query_request(wpa_s, sa, data, len);
2960 else if (data[0] == WLAN_SA_QUERY_RESPONSE)
2961 sme_process_sa_query_response(wpa_s, sa, data, len);
2962 }
2963