1 /*
2 * hostapd / IEEE 802.11 Management
3 * Copyright (c) 2002-2017, 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 "utils/includes.h"
10
11 #ifndef CONFIG_NATIVE_WINDOWS
12
13 #include "utils/common.h"
14 #include "utils/eloop.h"
15 #include "crypto/crypto.h"
16 #include "crypto/sha256.h"
17 #include "crypto/sha384.h"
18 #include "crypto/sha512.h"
19 #include "crypto/random.h"
20 #include "common/ieee802_11_defs.h"
21 #include "common/ieee802_11_common.h"
22 #include "common/wpa_ctrl.h"
23 #include "common/sae.h"
24 #include "common/dpp.h"
25 #include "common/ocv.h"
26 #include "common/wpa_common.h"
27 #include "common/wpa_ctrl.h"
28 #include "common/ptksa_cache.h"
29 #include "radius/radius.h"
30 #include "radius/radius_client.h"
31 #include "p2p/p2p.h"
32 #include "wps/wps.h"
33 #include "fst/fst.h"
34 #include "hostapd.h"
35 #include "beacon.h"
36 #include "ieee802_11_auth.h"
37 #include "sta_info.h"
38 #include "ieee802_1x.h"
39 #include "wpa_auth.h"
40 #include "pmksa_cache_auth.h"
41 #include "wmm.h"
42 #include "ap_list.h"
43 #include "accounting.h"
44 #include "ap_config.h"
45 #include "ap_mlme.h"
46 #include "p2p_hostapd.h"
47 #include "ap_drv_ops.h"
48 #include "wnm_ap.h"
49 #include "hw_features.h"
50 #include "ieee802_11.h"
51 #include "dfs.h"
52 #include "mbo_ap.h"
53 #include "rrm.h"
54 #include "taxonomy.h"
55 #include "fils_hlp.h"
56 #include "dpp_hostapd.h"
57 #include "gas_query_ap.h"
58 #include "comeback_token.h"
59 #include "pasn/pasn_common.h"
60
61
62 #ifdef CONFIG_FILS
63 static struct wpabuf *
64 prepare_auth_resp_fils(struct hostapd_data *hapd,
65 struct sta_info *sta, u16 *resp,
66 struct rsn_pmksa_cache_entry *pmksa,
67 struct wpabuf *erp_resp,
68 const u8 *msk, size_t msk_len,
69 int *is_pub);
70 #endif /* CONFIG_FILS */
71
72 #ifdef CONFIG_PASN
73 #ifdef CONFIG_FILS
74
75 static void pasn_fils_auth_resp(struct hostapd_data *hapd,
76 struct sta_info *sta, u16 status,
77 struct wpabuf *erp_resp,
78 const u8 *msk, size_t msk_len);
79
80 #endif /* CONFIG_FILS */
81 #endif /* CONFIG_PASN */
82
83 static void handle_auth(struct hostapd_data *hapd,
84 const struct ieee80211_mgmt *mgmt, size_t len,
85 int rssi, int from_queue);
86
87
hostapd_eid_multi_ap(struct hostapd_data * hapd,u8 * eid)88 u8 * hostapd_eid_multi_ap(struct hostapd_data *hapd, u8 *eid)
89 {
90 u8 multi_ap_val = 0;
91
92 if (!hapd->conf->multi_ap)
93 return eid;
94 if (hapd->conf->multi_ap & BACKHAUL_BSS)
95 multi_ap_val |= MULTI_AP_BACKHAUL_BSS;
96 if (hapd->conf->multi_ap & FRONTHAUL_BSS)
97 multi_ap_val |= MULTI_AP_FRONTHAUL_BSS;
98
99 return eid + add_multi_ap_ie(eid, 9, multi_ap_val);
100 }
101
102
hostapd_eid_supp_rates(struct hostapd_data * hapd,u8 * eid)103 u8 * hostapd_eid_supp_rates(struct hostapd_data *hapd, u8 *eid)
104 {
105 u8 *pos = eid;
106 int i, num, count;
107 int h2e_required;
108
109 if (hapd->iface->current_rates == NULL)
110 return eid;
111
112 *pos++ = WLAN_EID_SUPP_RATES;
113 num = hapd->iface->num_rates;
114 if (hapd->iconf->ieee80211n && hapd->iconf->require_ht)
115 num++;
116 if (hapd->iconf->ieee80211ac && hapd->iconf->require_vht)
117 num++;
118 #ifdef CONFIG_IEEE80211AX
119 if (hapd->iconf->ieee80211ax && hapd->iconf->require_he)
120 num++;
121 #endif /* CONFIG_IEEE80211AX */
122 h2e_required = (hapd->conf->sae_pwe == SAE_PWE_HASH_TO_ELEMENT ||
123 hostapd_sae_pw_id_in_use(hapd->conf) == 2) &&
124 hapd->conf->sae_pwe != SAE_PWE_FORCE_HUNT_AND_PECK &&
125 wpa_key_mgmt_sae(hapd->conf->wpa_key_mgmt);
126 if (h2e_required)
127 num++;
128 if (num > 8) {
129 /* rest of the rates are encoded in Extended supported
130 * rates element */
131 num = 8;
132 }
133
134 *pos++ = num;
135 for (i = 0, count = 0; i < hapd->iface->num_rates && count < num;
136 i++) {
137 count++;
138 *pos = hapd->iface->current_rates[i].rate / 5;
139 if (hapd->iface->current_rates[i].flags & HOSTAPD_RATE_BASIC)
140 *pos |= 0x80;
141 pos++;
142 }
143
144 if (hapd->iconf->ieee80211n && hapd->iconf->require_ht && count < 8) {
145 count++;
146 *pos++ = 0x80 | BSS_MEMBERSHIP_SELECTOR_HT_PHY;
147 }
148
149 if (hapd->iconf->ieee80211ac && hapd->iconf->require_vht && count < 8) {
150 count++;
151 *pos++ = 0x80 | BSS_MEMBERSHIP_SELECTOR_VHT_PHY;
152 }
153
154 #ifdef CONFIG_IEEE80211AX
155 if (hapd->iconf->ieee80211ax && hapd->iconf->require_he && count < 8) {
156 count++;
157 *pos++ = 0x80 | BSS_MEMBERSHIP_SELECTOR_HE_PHY;
158 }
159 #endif /* CONFIG_IEEE80211AX */
160
161 if (h2e_required && count < 8) {
162 count++;
163 *pos++ = 0x80 | BSS_MEMBERSHIP_SELECTOR_SAE_H2E_ONLY;
164 }
165
166 return pos;
167 }
168
169
hostapd_eid_ext_supp_rates(struct hostapd_data * hapd,u8 * eid)170 u8 * hostapd_eid_ext_supp_rates(struct hostapd_data *hapd, u8 *eid)
171 {
172 u8 *pos = eid;
173 int i, num, count;
174 int h2e_required;
175
176 hapd->conf->xrates_supported = false;
177 if (hapd->iface->current_rates == NULL)
178 return eid;
179
180 num = hapd->iface->num_rates;
181 if (hapd->iconf->ieee80211n && hapd->iconf->require_ht)
182 num++;
183 if (hapd->iconf->ieee80211ac && hapd->iconf->require_vht)
184 num++;
185 #ifdef CONFIG_IEEE80211AX
186 if (hapd->iconf->ieee80211ax && hapd->iconf->require_he)
187 num++;
188 #endif /* CONFIG_IEEE80211AX */
189 h2e_required = (hapd->conf->sae_pwe == SAE_PWE_HASH_TO_ELEMENT ||
190 hostapd_sae_pw_id_in_use(hapd->conf) == 2) &&
191 hapd->conf->sae_pwe != SAE_PWE_FORCE_HUNT_AND_PECK &&
192 wpa_key_mgmt_sae(hapd->conf->wpa_key_mgmt);
193 if (h2e_required)
194 num++;
195 if (num <= 8)
196 return eid;
197 num -= 8;
198
199 *pos++ = WLAN_EID_EXT_SUPP_RATES;
200 *pos++ = num;
201 for (i = 0, count = 0; i < hapd->iface->num_rates && count < num + 8;
202 i++) {
203 count++;
204 if (count <= 8)
205 continue; /* already in SuppRates IE */
206 *pos = hapd->iface->current_rates[i].rate / 5;
207 if (hapd->iface->current_rates[i].flags & HOSTAPD_RATE_BASIC)
208 *pos |= 0x80;
209 pos++;
210 }
211
212 if (hapd->iconf->ieee80211n && hapd->iconf->require_ht) {
213 count++;
214 if (count > 8)
215 *pos++ = 0x80 | BSS_MEMBERSHIP_SELECTOR_HT_PHY;
216 }
217
218 if (hapd->iconf->ieee80211ac && hapd->iconf->require_vht) {
219 count++;
220 if (count > 8)
221 *pos++ = 0x80 | BSS_MEMBERSHIP_SELECTOR_VHT_PHY;
222 }
223
224 #ifdef CONFIG_IEEE80211AX
225 if (hapd->iconf->ieee80211ax && hapd->iconf->require_he) {
226 count++;
227 if (count > 8)
228 *pos++ = 0x80 | BSS_MEMBERSHIP_SELECTOR_HE_PHY;
229 }
230 #endif /* CONFIG_IEEE80211AX */
231
232 if (h2e_required) {
233 count++;
234 if (count > 8)
235 *pos++ = 0x80 | BSS_MEMBERSHIP_SELECTOR_SAE_H2E_ONLY;
236 }
237
238 hapd->conf->xrates_supported = true;
239 return pos;
240 }
241
242
hostapd_eid_rm_enabled_capab(struct hostapd_data * hapd,u8 * eid,size_t len)243 u8 * hostapd_eid_rm_enabled_capab(struct hostapd_data *hapd, u8 *eid,
244 size_t len)
245 {
246 size_t i;
247
248 for (i = 0; i < RRM_CAPABILITIES_IE_LEN; i++) {
249 if (hapd->conf->radio_measurements[i])
250 break;
251 }
252
253 if (i == RRM_CAPABILITIES_IE_LEN || len < 2 + RRM_CAPABILITIES_IE_LEN)
254 return eid;
255
256 *eid++ = WLAN_EID_RRM_ENABLED_CAPABILITIES;
257 *eid++ = RRM_CAPABILITIES_IE_LEN;
258 os_memcpy(eid, hapd->conf->radio_measurements, RRM_CAPABILITIES_IE_LEN);
259
260 return eid + RRM_CAPABILITIES_IE_LEN;
261 }
262
263
hostapd_own_capab_info(struct hostapd_data * hapd)264 u16 hostapd_own_capab_info(struct hostapd_data *hapd)
265 {
266 int capab = WLAN_CAPABILITY_ESS;
267 int privacy = 0;
268 int dfs;
269 int i;
270
271 /* Check if any of configured channels require DFS */
272 dfs = hostapd_is_dfs_required(hapd->iface);
273 if (dfs < 0) {
274 wpa_printf(MSG_WARNING, "Failed to check if DFS is required; ret=%d",
275 dfs);
276 dfs = 0;
277 }
278
279 if (hapd->iface->num_sta_no_short_preamble == 0 &&
280 hapd->iconf->preamble == SHORT_PREAMBLE)
281 capab |= WLAN_CAPABILITY_SHORT_PREAMBLE;
282
283 #ifdef CONFIG_WEP
284 privacy = hapd->conf->ssid.wep.keys_set;
285
286 if (hapd->conf->ieee802_1x &&
287 (hapd->conf->default_wep_key_len ||
288 hapd->conf->individual_wep_key_len))
289 privacy = 1;
290 #endif /* CONFIG_WEP */
291
292 if (hapd->conf->wpa)
293 privacy = 1;
294
295 #ifdef CONFIG_HS20
296 if (hapd->conf->osen)
297 privacy = 1;
298 #endif /* CONFIG_HS20 */
299
300 if (privacy)
301 capab |= WLAN_CAPABILITY_PRIVACY;
302
303 if (hapd->iface->current_mode &&
304 hapd->iface->current_mode->mode == HOSTAPD_MODE_IEEE80211G &&
305 hapd->iface->num_sta_no_short_slot_time == 0)
306 capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME;
307
308 /*
309 * Currently, Spectrum Management capability bit is set when directly
310 * requested in configuration by spectrum_mgmt_required or when AP is
311 * running on DFS channel.
312 * TODO: Also consider driver support for TPC to set Spectrum Mgmt bit
313 */
314 if (hapd->iface->current_mode &&
315 hapd->iface->current_mode->mode == HOSTAPD_MODE_IEEE80211A &&
316 (hapd->iconf->spectrum_mgmt_required || dfs))
317 capab |= WLAN_CAPABILITY_SPECTRUM_MGMT;
318
319 for (i = 0; i < RRM_CAPABILITIES_IE_LEN; i++) {
320 if (hapd->conf->radio_measurements[i]) {
321 capab |= IEEE80211_CAP_RRM;
322 break;
323 }
324 }
325
326 return capab;
327 }
328
329
330 #ifdef CONFIG_WEP
331 #ifndef CONFIG_NO_RC4
auth_shared_key(struct hostapd_data * hapd,struct sta_info * sta,u16 auth_transaction,const u8 * challenge,int iswep)332 static u16 auth_shared_key(struct hostapd_data *hapd, struct sta_info *sta,
333 u16 auth_transaction, const u8 *challenge,
334 int iswep)
335 {
336 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
337 HOSTAPD_LEVEL_DEBUG,
338 "authentication (shared key, transaction %d)",
339 auth_transaction);
340
341 if (auth_transaction == 1) {
342 if (!sta->challenge) {
343 /* Generate a pseudo-random challenge */
344 u8 key[8];
345
346 sta->challenge = os_zalloc(WLAN_AUTH_CHALLENGE_LEN);
347 if (sta->challenge == NULL)
348 return WLAN_STATUS_UNSPECIFIED_FAILURE;
349
350 if (os_get_random(key, sizeof(key)) < 0) {
351 os_free(sta->challenge);
352 sta->challenge = NULL;
353 return WLAN_STATUS_UNSPECIFIED_FAILURE;
354 }
355
356 rc4_skip(key, sizeof(key), 0,
357 sta->challenge, WLAN_AUTH_CHALLENGE_LEN);
358 }
359 return 0;
360 }
361
362 if (auth_transaction != 3)
363 return WLAN_STATUS_UNSPECIFIED_FAILURE;
364
365 /* Transaction 3 */
366 if (!iswep || !sta->challenge || !challenge ||
367 os_memcmp_const(sta->challenge, challenge,
368 WLAN_AUTH_CHALLENGE_LEN)) {
369 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
370 HOSTAPD_LEVEL_INFO,
371 "shared key authentication - invalid "
372 "challenge-response");
373 return WLAN_STATUS_CHALLENGE_FAIL;
374 }
375
376 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
377 HOSTAPD_LEVEL_DEBUG,
378 "authentication OK (shared key)");
379 sta->flags |= WLAN_STA_AUTH;
380 wpa_auth_sm_event(sta->wpa_sm, WPA_AUTH);
381 os_free(sta->challenge);
382 sta->challenge = NULL;
383
384 return 0;
385 }
386 #endif /* CONFIG_NO_RC4 */
387 #endif /* CONFIG_WEP */
388
389
send_auth_reply(struct hostapd_data * hapd,struct sta_info * sta,const u8 * dst,const u8 * bssid,u16 auth_alg,u16 auth_transaction,u16 resp,const u8 * ies,size_t ies_len,const char * dbg)390 static int send_auth_reply(struct hostapd_data *hapd, struct sta_info *sta,
391 const u8 *dst, const u8 *bssid,
392 u16 auth_alg, u16 auth_transaction, u16 resp,
393 const u8 *ies, size_t ies_len, const char *dbg)
394 {
395 struct ieee80211_mgmt *reply;
396 u8 *buf;
397 size_t rlen;
398 int reply_res = WLAN_STATUS_UNSPECIFIED_FAILURE;
399
400 rlen = IEEE80211_HDRLEN + sizeof(reply->u.auth) + ies_len;
401 buf = os_zalloc(rlen);
402 if (buf == NULL)
403 return -1;
404
405 reply = (struct ieee80211_mgmt *) buf;
406 reply->frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
407 WLAN_FC_STYPE_AUTH);
408 os_memcpy(reply->da, dst, ETH_ALEN);
409 os_memcpy(reply->sa, hapd->own_addr, ETH_ALEN);
410 os_memcpy(reply->bssid, bssid, ETH_ALEN);
411
412 reply->u.auth.auth_alg = host_to_le16(auth_alg);
413 reply->u.auth.auth_transaction = host_to_le16(auth_transaction);
414 reply->u.auth.status_code = host_to_le16(resp);
415
416 if (ies && ies_len)
417 os_memcpy(reply->u.auth.variable, ies, ies_len);
418
419 wpa_printf(MSG_DEBUG, "authentication reply: STA=" MACSTR
420 " auth_alg=%d auth_transaction=%d resp=%d (IE len=%lu) (dbg=%s)",
421 MAC2STR(dst), auth_alg, auth_transaction,
422 resp, (unsigned long) ies_len, dbg);
423 #ifdef CONFIG_TESTING_OPTIONS
424 #ifdef CONFIG_SAE
425 if (hapd->conf->sae_confirm_immediate == 2 &&
426 auth_alg == WLAN_AUTH_SAE) {
427 if (auth_transaction == 1 && sta &&
428 (resp == WLAN_STATUS_SUCCESS ||
429 resp == WLAN_STATUS_SAE_HASH_TO_ELEMENT ||
430 resp == WLAN_STATUS_SAE_PK)) {
431 wpa_printf(MSG_DEBUG,
432 "TESTING: Postpone SAE Commit transmission until Confirm is ready");
433 os_free(sta->sae_postponed_commit);
434 sta->sae_postponed_commit = buf;
435 sta->sae_postponed_commit_len = rlen;
436 return WLAN_STATUS_SUCCESS;
437 }
438
439 if (auth_transaction == 2 && sta && sta->sae_postponed_commit) {
440 wpa_printf(MSG_DEBUG,
441 "TESTING: Send postponed SAE Commit first, immediately followed by SAE Confirm");
442 if (hostapd_drv_send_mlme(hapd,
443 sta->sae_postponed_commit,
444 sta->sae_postponed_commit_len,
445 0, NULL, 0, 0) < 0)
446 wpa_printf(MSG_INFO, "send_auth_reply: send failed");
447 os_free(sta->sae_postponed_commit);
448 sta->sae_postponed_commit = NULL;
449 sta->sae_postponed_commit_len = 0;
450 }
451 }
452 #endif /* CONFIG_SAE */
453 #endif /* CONFIG_TESTING_OPTIONS */
454 if (hostapd_drv_send_mlme(hapd, reply, rlen, 0, NULL, 0, 0) < 0)
455 wpa_printf(MSG_INFO, "send_auth_reply: send failed");
456 else
457 reply_res = WLAN_STATUS_SUCCESS;
458
459 os_free(buf);
460
461 return reply_res;
462 }
463
464
465 #ifdef CONFIG_IEEE80211R_AP
handle_auth_ft_finish(void * ctx,const u8 * dst,const u8 * bssid,u16 auth_transaction,u16 status,const u8 * ies,size_t ies_len)466 static void handle_auth_ft_finish(void *ctx, const u8 *dst, const u8 *bssid,
467 u16 auth_transaction, u16 status,
468 const u8 *ies, size_t ies_len)
469 {
470 struct hostapd_data *hapd = ctx;
471 struct sta_info *sta;
472 int reply_res;
473
474 reply_res = send_auth_reply(hapd, NULL, dst, bssid, WLAN_AUTH_FT,
475 auth_transaction, status, ies, ies_len,
476 "auth-ft-finish");
477
478 sta = ap_get_sta(hapd, dst);
479 if (sta == NULL)
480 return;
481
482 if (sta->added_unassoc && (reply_res != WLAN_STATUS_SUCCESS ||
483 status != WLAN_STATUS_SUCCESS)) {
484 hostapd_drv_sta_remove(hapd, sta->addr);
485 sta->added_unassoc = 0;
486 return;
487 }
488
489 if (status != WLAN_STATUS_SUCCESS)
490 return;
491
492 hostapd_logger(hapd, dst, HOSTAPD_MODULE_IEEE80211,
493 HOSTAPD_LEVEL_DEBUG, "authentication OK (FT)");
494 sta->flags |= WLAN_STA_AUTH;
495 mlme_authenticate_indication(hapd, sta);
496 }
497 #endif /* CONFIG_IEEE80211R_AP */
498
499
500 #ifdef CONFIG_SAE
501
sae_set_state(struct sta_info * sta,enum sae_state state,const char * reason)502 static void sae_set_state(struct sta_info *sta, enum sae_state state,
503 const char *reason)
504 {
505 wpa_printf(MSG_DEBUG, "SAE: State %s -> %s for peer " MACSTR " (%s)",
506 sae_state_txt(sta->sae->state), sae_state_txt(state),
507 MAC2STR(sta->addr), reason);
508 sta->sae->state = state;
509 }
510
511
sae_get_password(struct hostapd_data * hapd,struct sta_info * sta,const char * rx_id,struct sae_password_entry ** pw_entry,struct sae_pt ** s_pt,const struct sae_pk ** s_pk)512 static const char * sae_get_password(struct hostapd_data *hapd,
513 struct sta_info *sta,
514 const char *rx_id,
515 struct sae_password_entry **pw_entry,
516 struct sae_pt **s_pt,
517 const struct sae_pk **s_pk)
518 {
519 const char *password = NULL;
520 struct sae_password_entry *pw;
521 struct sae_pt *pt = NULL;
522 const struct sae_pk *pk = NULL;
523 struct hostapd_sta_wpa_psk_short *psk = NULL;
524
525 for (pw = hapd->conf->sae_passwords; pw; pw = pw->next) {
526 if (!is_broadcast_ether_addr(pw->peer_addr) &&
527 os_memcmp(pw->peer_addr, sta->addr, ETH_ALEN) != 0)
528 continue;
529 if ((rx_id && !pw->identifier) || (!rx_id && pw->identifier))
530 continue;
531 if (rx_id && pw->identifier &&
532 os_strcmp(rx_id, pw->identifier) != 0)
533 continue;
534 password = pw->password;
535 pt = pw->pt;
536 if (!(hapd->conf->mesh & MESH_ENABLED))
537 pk = pw->pk;
538 break;
539 }
540 if (!password) {
541 password = hapd->conf->ssid.wpa_passphrase;
542 pt = hapd->conf->ssid.pt;
543 }
544
545 if (!password) {
546 for (psk = sta->psk; psk; psk = psk->next) {
547 if (psk->is_passphrase) {
548 password = psk->passphrase;
549 break;
550 }
551 }
552 }
553
554 if (pw_entry)
555 *pw_entry = pw;
556 if (s_pt)
557 *s_pt = pt;
558 if (s_pk)
559 *s_pk = pk;
560
561 return password;
562 }
563
564
auth_build_sae_commit(struct hostapd_data * hapd,struct sta_info * sta,int update,int status_code)565 static struct wpabuf * auth_build_sae_commit(struct hostapd_data *hapd,
566 struct sta_info *sta, int update,
567 int status_code)
568 {
569 struct wpabuf *buf;
570 const char *password = NULL;
571 struct sae_password_entry *pw;
572 const char *rx_id = NULL;
573 int use_pt = 0;
574 struct sae_pt *pt = NULL;
575 const struct sae_pk *pk = NULL;
576
577 if (sta->sae->tmp) {
578 rx_id = sta->sae->tmp->pw_id;
579 use_pt = sta->sae->h2e;
580 #ifdef CONFIG_SAE_PK
581 os_memcpy(sta->sae->tmp->own_addr, hapd->own_addr, ETH_ALEN);
582 os_memcpy(sta->sae->tmp->peer_addr, sta->addr, ETH_ALEN);
583 #endif /* CONFIG_SAE_PK */
584 }
585
586 if (rx_id && hapd->conf->sae_pwe != SAE_PWE_FORCE_HUNT_AND_PECK)
587 use_pt = 1;
588 else if (status_code == WLAN_STATUS_SUCCESS)
589 use_pt = 0;
590 else if (status_code == WLAN_STATUS_SAE_HASH_TO_ELEMENT ||
591 status_code == WLAN_STATUS_SAE_PK)
592 use_pt = 1;
593
594 password = sae_get_password(hapd, sta, rx_id, &pw, &pt, &pk);
595 if (!password || (use_pt && !pt)) {
596 wpa_printf(MSG_DEBUG, "SAE: No password available");
597 return NULL;
598 }
599
600 if (update && use_pt &&
601 sae_prepare_commit_pt(sta->sae, pt, hapd->own_addr, sta->addr,
602 NULL, pk) < 0)
603 return NULL;
604
605 if (update && !use_pt &&
606 sae_prepare_commit(hapd->own_addr, sta->addr,
607 (u8 *) password, os_strlen(password),
608 sta->sae) < 0) {
609 wpa_printf(MSG_DEBUG, "SAE: Could not pick PWE");
610 return NULL;
611 }
612
613 if (pw && pw->vlan_id) {
614 if (!sta->sae->tmp) {
615 wpa_printf(MSG_INFO,
616 "SAE: No temporary data allocated - cannot store VLAN ID");
617 return NULL;
618 }
619 sta->sae->tmp->vlan_id = pw->vlan_id;
620 }
621
622 buf = wpabuf_alloc(SAE_COMMIT_MAX_LEN +
623 (rx_id ? 3 + os_strlen(rx_id) : 0));
624 if (buf &&
625 sae_write_commit(sta->sae, buf, sta->sae->tmp ?
626 sta->sae->tmp->anti_clogging_token : NULL,
627 rx_id) < 0) {
628 wpabuf_free(buf);
629 buf = NULL;
630 }
631
632 return buf;
633 }
634
635
auth_build_sae_confirm(struct hostapd_data * hapd,struct sta_info * sta)636 static struct wpabuf * auth_build_sae_confirm(struct hostapd_data *hapd,
637 struct sta_info *sta)
638 {
639 struct wpabuf *buf;
640
641 buf = wpabuf_alloc(SAE_CONFIRM_MAX_LEN);
642 if (buf == NULL)
643 return NULL;
644
645 #ifdef CONFIG_SAE_PK
646 #ifdef CONFIG_TESTING_OPTIONS
647 if (sta->sae->tmp)
648 sta->sae->tmp->omit_pk_elem = hapd->conf->sae_pk_omit;
649 #endif /* CONFIG_TESTING_OPTIONS */
650 #endif /* CONFIG_SAE_PK */
651
652 if (sae_write_confirm(sta->sae, buf) < 0) {
653 wpabuf_free(buf);
654 return NULL;
655 }
656
657 return buf;
658 }
659
660
auth_sae_send_commit(struct hostapd_data * hapd,struct sta_info * sta,const u8 * bssid,int update,int status_code)661 static int auth_sae_send_commit(struct hostapd_data *hapd,
662 struct sta_info *sta,
663 const u8 *bssid, int update, int status_code)
664 {
665 struct wpabuf *data;
666 int reply_res;
667 u16 status;
668
669 data = auth_build_sae_commit(hapd, sta, update, status_code);
670 if (!data && sta->sae->tmp && sta->sae->tmp->pw_id)
671 return WLAN_STATUS_UNKNOWN_PASSWORD_IDENTIFIER;
672 if (data == NULL)
673 return WLAN_STATUS_UNSPECIFIED_FAILURE;
674
675 if (sta->sae->tmp && sta->sae->pk)
676 status = WLAN_STATUS_SAE_PK;
677 else if (sta->sae->tmp && sta->sae->h2e)
678 status = WLAN_STATUS_SAE_HASH_TO_ELEMENT;
679 else
680 status = WLAN_STATUS_SUCCESS;
681 #ifdef CONFIG_TESTING_OPTIONS
682 if (hapd->conf->sae_commit_status >= 0 &&
683 hapd->conf->sae_commit_status != status) {
684 wpa_printf(MSG_INFO,
685 "TESTING: Override SAE commit status code %u --> %d",
686 status, hapd->conf->sae_commit_status);
687 status = hapd->conf->sae_commit_status;
688 }
689 #endif /* CONFIG_TESTING_OPTIONS */
690 reply_res = send_auth_reply(hapd, sta, sta->addr, bssid,
691 WLAN_AUTH_SAE, 1,
692 status, wpabuf_head(data),
693 wpabuf_len(data), "sae-send-commit");
694
695 wpabuf_free(data);
696
697 return reply_res;
698 }
699
700
auth_sae_send_confirm(struct hostapd_data * hapd,struct sta_info * sta,const u8 * bssid)701 static int auth_sae_send_confirm(struct hostapd_data *hapd,
702 struct sta_info *sta,
703 const u8 *bssid)
704 {
705 struct wpabuf *data;
706 int reply_res;
707
708 data = auth_build_sae_confirm(hapd, sta);
709 if (data == NULL)
710 return WLAN_STATUS_UNSPECIFIED_FAILURE;
711
712 reply_res = send_auth_reply(hapd, sta, sta->addr, bssid,
713 WLAN_AUTH_SAE, 2,
714 WLAN_STATUS_SUCCESS, wpabuf_head(data),
715 wpabuf_len(data), "sae-send-confirm");
716
717 wpabuf_free(data);
718
719 return reply_res;
720 }
721
722 #endif /* CONFIG_SAE */
723
724
725 #if defined(CONFIG_SAE) || defined(CONFIG_PASN)
726
use_anti_clogging(struct hostapd_data * hapd)727 static int use_anti_clogging(struct hostapd_data *hapd)
728 {
729 struct sta_info *sta;
730 unsigned int open = 0;
731
732 if (hapd->conf->anti_clogging_threshold == 0)
733 return 1;
734
735 for (sta = hapd->sta_list; sta; sta = sta->next) {
736 #ifdef CONFIG_SAE
737 if (sta->sae &&
738 (sta->sae->state == SAE_COMMITTED ||
739 sta->sae->state == SAE_CONFIRMED))
740 open++;
741 #endif /* CONFIG_SAE */
742 #ifdef CONFIG_PASN
743 if (sta->pasn && sta->pasn->ecdh)
744 open++;
745 #endif /* CONFIG_PASN */
746 if (open >= hapd->conf->anti_clogging_threshold)
747 return 1;
748 }
749
750 #ifdef CONFIG_SAE
751 /* In addition to already existing open SAE sessions, check whether
752 * there are enough pending commit messages in the processing queue to
753 * potentially result in too many open sessions. */
754 if (open + dl_list_len(&hapd->sae_commit_queue) >=
755 hapd->conf->anti_clogging_threshold)
756 return 1;
757 #endif /* CONFIG_SAE */
758
759 return 0;
760 }
761
762 #endif /* defined(CONFIG_SAE) || defined(CONFIG_PASN) */
763
764
765 #ifdef CONFIG_SAE
766
sae_check_big_sync(struct hostapd_data * hapd,struct sta_info * sta)767 static int sae_check_big_sync(struct hostapd_data *hapd, struct sta_info *sta)
768 {
769 if (sta->sae->sync > hapd->conf->sae_sync) {
770 sae_set_state(sta, SAE_NOTHING, "Sync > dot11RSNASAESync");
771 sta->sae->sync = 0;
772 return -1;
773 }
774 return 0;
775 }
776
777
auth_sae_retransmit_timer(void * eloop_ctx,void * eloop_data)778 static void auth_sae_retransmit_timer(void *eloop_ctx, void *eloop_data)
779 {
780 struct hostapd_data *hapd = eloop_ctx;
781 struct sta_info *sta = eloop_data;
782 int ret;
783
784 if (sae_check_big_sync(hapd, sta))
785 return;
786 sta->sae->sync++;
787 wpa_printf(MSG_DEBUG, "SAE: Auth SAE retransmit timer for " MACSTR
788 " (sync=%d state=%s)",
789 MAC2STR(sta->addr), sta->sae->sync,
790 sae_state_txt(sta->sae->state));
791
792 switch (sta->sae->state) {
793 case SAE_COMMITTED:
794 ret = auth_sae_send_commit(hapd, sta, hapd->own_addr, 0, -1);
795 eloop_register_timeout(0,
796 hapd->dot11RSNASAERetransPeriod * 1000,
797 auth_sae_retransmit_timer, hapd, sta);
798 break;
799 case SAE_CONFIRMED:
800 ret = auth_sae_send_confirm(hapd, sta, hapd->own_addr);
801 eloop_register_timeout(0,
802 hapd->dot11RSNASAERetransPeriod * 1000,
803 auth_sae_retransmit_timer, hapd, sta);
804 break;
805 default:
806 ret = -1;
807 break;
808 }
809
810 if (ret != WLAN_STATUS_SUCCESS)
811 wpa_printf(MSG_INFO, "SAE: Failed to retransmit: ret=%d", ret);
812 }
813
814
sae_clear_retransmit_timer(struct hostapd_data * hapd,struct sta_info * sta)815 void sae_clear_retransmit_timer(struct hostapd_data *hapd, struct sta_info *sta)
816 {
817 eloop_cancel_timeout(auth_sae_retransmit_timer, hapd, sta);
818 }
819
820
sae_set_retransmit_timer(struct hostapd_data * hapd,struct sta_info * sta)821 static void sae_set_retransmit_timer(struct hostapd_data *hapd,
822 struct sta_info *sta)
823 {
824 if (!(hapd->conf->mesh & MESH_ENABLED))
825 return;
826
827 eloop_cancel_timeout(auth_sae_retransmit_timer, hapd, sta);
828 eloop_register_timeout(0, hapd->dot11RSNASAERetransPeriod * 1000,
829 auth_sae_retransmit_timer, hapd, sta);
830 }
831
832
sae_sme_send_external_auth_status(struct hostapd_data * hapd,struct sta_info * sta,u16 status)833 static void sae_sme_send_external_auth_status(struct hostapd_data *hapd,
834 struct sta_info *sta, u16 status)
835 {
836 struct external_auth params;
837
838 os_memset(¶ms, 0, sizeof(params));
839 params.status = status;
840 params.bssid = sta->addr;
841 if (status == WLAN_STATUS_SUCCESS && sta->sae &&
842 !hapd->conf->disable_pmksa_caching)
843 params.pmkid = sta->sae->pmkid;
844
845 hostapd_drv_send_external_auth_status(hapd, ¶ms);
846 }
847
848
sae_accept_sta(struct hostapd_data * hapd,struct sta_info * sta)849 void sae_accept_sta(struct hostapd_data *hapd, struct sta_info *sta)
850 {
851 #ifndef CONFIG_NO_VLAN
852 struct vlan_description vlan_desc;
853
854 if (sta->sae->tmp && sta->sae->tmp->vlan_id > 0) {
855 wpa_printf(MSG_DEBUG, "SAE: Assign STA " MACSTR
856 " to VLAN ID %d",
857 MAC2STR(sta->addr), sta->sae->tmp->vlan_id);
858
859 os_memset(&vlan_desc, 0, sizeof(vlan_desc));
860 vlan_desc.notempty = 1;
861 vlan_desc.untagged = sta->sae->tmp->vlan_id;
862 if (!hostapd_vlan_valid(hapd->conf->vlan, &vlan_desc)) {
863 wpa_printf(MSG_INFO,
864 "Invalid VLAN ID %d in sae_password",
865 sta->sae->tmp->vlan_id);
866 return;
867 }
868
869 if (ap_sta_set_vlan(hapd, sta, &vlan_desc) < 0 ||
870 ap_sta_bind_vlan(hapd, sta) < 0) {
871 wpa_printf(MSG_INFO,
872 "Failed to assign VLAN ID %d from sae_password to "
873 MACSTR, sta->sae->tmp->vlan_id,
874 MAC2STR(sta->addr));
875 return;
876 }
877 }
878 #endif /* CONFIG_NO_VLAN */
879
880 sta->flags |= WLAN_STA_AUTH;
881 sta->auth_alg = WLAN_AUTH_SAE;
882 mlme_authenticate_indication(hapd, sta);
883 wpa_auth_sm_event(sta->wpa_sm, WPA_AUTH);
884 sae_set_state(sta, SAE_ACCEPTED, "Accept Confirm");
885 crypto_bignum_deinit(sta->sae->peer_commit_scalar_accepted, 0);
886 sta->sae->peer_commit_scalar_accepted = sta->sae->peer_commit_scalar;
887 sta->sae->peer_commit_scalar = NULL;
888 wpa_auth_pmksa_add_sae(hapd->wpa_auth, sta->addr,
889 sta->sae->pmk, sta->sae->pmk_len,
890 sta->sae->pmkid, sta->sae->akmp);
891 sae_sme_send_external_auth_status(hapd, sta, WLAN_STATUS_SUCCESS);
892 }
893
894
sae_sm_step(struct hostapd_data * hapd,struct sta_info * sta,const u8 * bssid,u16 auth_transaction,u16 status_code,int allow_reuse,int * sta_removed)895 static int sae_sm_step(struct hostapd_data *hapd, struct sta_info *sta,
896 const u8 *bssid, u16 auth_transaction, u16 status_code,
897 int allow_reuse, int *sta_removed)
898 {
899 int ret;
900
901 *sta_removed = 0;
902
903 if (auth_transaction != 1 && auth_transaction != 2)
904 return WLAN_STATUS_UNSPECIFIED_FAILURE;
905
906 wpa_printf(MSG_DEBUG, "SAE: Peer " MACSTR " state=%s auth_trans=%u",
907 MAC2STR(sta->addr), sae_state_txt(sta->sae->state),
908 auth_transaction);
909 switch (sta->sae->state) {
910 case SAE_NOTHING:
911 if (auth_transaction == 1) {
912 if (sta->sae->tmp) {
913 sta->sae->h2e =
914 (status_code ==
915 WLAN_STATUS_SAE_HASH_TO_ELEMENT ||
916 status_code == WLAN_STATUS_SAE_PK);
917 sta->sae->pk =
918 status_code == WLAN_STATUS_SAE_PK;
919 }
920 ret = auth_sae_send_commit(hapd, sta, bssid,
921 !allow_reuse, status_code);
922 if (ret)
923 return ret;
924 sae_set_state(sta, SAE_COMMITTED, "Sent Commit");
925
926 if (sae_process_commit(sta->sae) < 0)
927 return WLAN_STATUS_UNSPECIFIED_FAILURE;
928
929 /*
930 * In mesh case, both Commit and Confirm are sent
931 * immediately. In infrastructure BSS, by default, only
932 * a single Authentication frame (Commit) is expected
933 * from the AP here and the second one (Confirm) will
934 * be sent once the STA has sent its second
935 * Authentication frame (Confirm). This behavior can be
936 * overridden with explicit configuration so that the
937 * infrastructure BSS case sends both frames together.
938 */
939 if ((hapd->conf->mesh & MESH_ENABLED) ||
940 hapd->conf->sae_confirm_immediate) {
941 /*
942 * Send both Commit and Confirm immediately
943 * based on SAE finite state machine
944 * Nothing -> Confirm transition.
945 */
946 ret = auth_sae_send_confirm(hapd, sta, bssid);
947 if (ret)
948 return ret;
949 sae_set_state(sta, SAE_CONFIRMED,
950 "Sent Confirm (mesh)");
951 } else {
952 /*
953 * For infrastructure BSS, send only the Commit
954 * message now to get alternating sequence of
955 * Authentication frames between the AP and STA.
956 * Confirm will be sent in
957 * Committed -> Confirmed/Accepted transition
958 * when receiving Confirm from STA.
959 */
960 }
961 sta->sae->sync = 0;
962 sae_set_retransmit_timer(hapd, sta);
963 } else {
964 hostapd_logger(hapd, sta->addr,
965 HOSTAPD_MODULE_IEEE80211,
966 HOSTAPD_LEVEL_DEBUG,
967 "SAE confirm before commit");
968 }
969 break;
970 case SAE_COMMITTED:
971 sae_clear_retransmit_timer(hapd, sta);
972 if (auth_transaction == 1) {
973 if (sae_process_commit(sta->sae) < 0)
974 return WLAN_STATUS_UNSPECIFIED_FAILURE;
975
976 ret = auth_sae_send_confirm(hapd, sta, bssid);
977 if (ret)
978 return ret;
979 sae_set_state(sta, SAE_CONFIRMED, "Sent Confirm");
980 sta->sae->sync = 0;
981 sae_set_retransmit_timer(hapd, sta);
982 } else if (hapd->conf->mesh & MESH_ENABLED) {
983 /*
984 * In mesh case, follow SAE finite state machine and
985 * send Commit now, if sync count allows.
986 */
987 if (sae_check_big_sync(hapd, sta))
988 return WLAN_STATUS_SUCCESS;
989 sta->sae->sync++;
990
991 ret = auth_sae_send_commit(hapd, sta, bssid, 0,
992 status_code);
993 if (ret)
994 return ret;
995
996 sae_set_retransmit_timer(hapd, sta);
997 } else {
998 /*
999 * For instructure BSS, send the postponed Confirm from
1000 * Nothing -> Confirmed transition that was reduced to
1001 * Nothing -> Committed above.
1002 */
1003 ret = auth_sae_send_confirm(hapd, sta, bssid);
1004 if (ret)
1005 return ret;
1006
1007 sae_set_state(sta, SAE_CONFIRMED, "Sent Confirm");
1008
1009 /*
1010 * Since this was triggered on Confirm RX, run another
1011 * step to get to Accepted without waiting for
1012 * additional events.
1013 */
1014 return sae_sm_step(hapd, sta, bssid, auth_transaction,
1015 WLAN_STATUS_SUCCESS, 0, sta_removed);
1016 }
1017 break;
1018 case SAE_CONFIRMED:
1019 sae_clear_retransmit_timer(hapd, sta);
1020 if (auth_transaction == 1) {
1021 if (sae_check_big_sync(hapd, sta))
1022 return WLAN_STATUS_SUCCESS;
1023 sta->sae->sync++;
1024
1025 ret = auth_sae_send_commit(hapd, sta, bssid, 1,
1026 status_code);
1027 if (ret)
1028 return ret;
1029
1030 if (sae_process_commit(sta->sae) < 0)
1031 return WLAN_STATUS_UNSPECIFIED_FAILURE;
1032
1033 ret = auth_sae_send_confirm(hapd, sta, bssid);
1034 if (ret)
1035 return ret;
1036
1037 sae_set_retransmit_timer(hapd, sta);
1038 } else {
1039 sta->sae->send_confirm = 0xffff;
1040 sae_accept_sta(hapd, sta);
1041 }
1042 break;
1043 case SAE_ACCEPTED:
1044 if (auth_transaction == 1 &&
1045 (hapd->conf->mesh & MESH_ENABLED)) {
1046 wpa_printf(MSG_DEBUG, "SAE: remove the STA (" MACSTR
1047 ") doing reauthentication",
1048 MAC2STR(sta->addr));
1049 wpa_auth_pmksa_remove(hapd->wpa_auth, sta->addr);
1050 ap_free_sta(hapd, sta);
1051 *sta_removed = 1;
1052 } else if (auth_transaction == 1) {
1053 wpa_printf(MSG_DEBUG, "SAE: Start reauthentication");
1054 ret = auth_sae_send_commit(hapd, sta, bssid, 1,
1055 status_code);
1056 if (ret)
1057 return ret;
1058 sae_set_state(sta, SAE_COMMITTED, "Sent Commit");
1059
1060 if (sae_process_commit(sta->sae) < 0)
1061 return WLAN_STATUS_UNSPECIFIED_FAILURE;
1062 sta->sae->sync = 0;
1063 sae_set_retransmit_timer(hapd, sta);
1064 } else {
1065 if (sae_check_big_sync(hapd, sta))
1066 return WLAN_STATUS_SUCCESS;
1067 sta->sae->sync++;
1068
1069 ret = auth_sae_send_confirm(hapd, sta, bssid);
1070 sae_clear_temp_data(sta->sae);
1071 if (ret)
1072 return ret;
1073 }
1074 break;
1075 default:
1076 wpa_printf(MSG_ERROR, "SAE: invalid state %d",
1077 sta->sae->state);
1078 return WLAN_STATUS_UNSPECIFIED_FAILURE;
1079 }
1080 return WLAN_STATUS_SUCCESS;
1081 }
1082
1083
sae_pick_next_group(struct hostapd_data * hapd,struct sta_info * sta)1084 static void sae_pick_next_group(struct hostapd_data *hapd, struct sta_info *sta)
1085 {
1086 struct sae_data *sae = sta->sae;
1087 int i, *groups = hapd->conf->sae_groups;
1088 int default_groups[] = { 19, 0 };
1089
1090 if (sae->state != SAE_COMMITTED)
1091 return;
1092
1093 wpa_printf(MSG_DEBUG, "SAE: Previously selected group: %d", sae->group);
1094
1095 if (!groups)
1096 groups = default_groups;
1097 for (i = 0; groups[i] > 0; i++) {
1098 if (sae->group == groups[i])
1099 break;
1100 }
1101
1102 if (groups[i] <= 0) {
1103 wpa_printf(MSG_DEBUG,
1104 "SAE: Previously selected group not found from the current configuration");
1105 return;
1106 }
1107
1108 for (;;) {
1109 i++;
1110 if (groups[i] <= 0) {
1111 wpa_printf(MSG_DEBUG,
1112 "SAE: No alternative group enabled");
1113 return;
1114 }
1115
1116 if (sae_set_group(sae, groups[i]) < 0)
1117 continue;
1118
1119 break;
1120 }
1121 wpa_printf(MSG_DEBUG, "SAE: Selected new group: %d", groups[i]);
1122 }
1123
1124
sae_status_success(struct hostapd_data * hapd,u16 status_code)1125 static int sae_status_success(struct hostapd_data *hapd, u16 status_code)
1126 {
1127 enum sae_pwe sae_pwe = hapd->conf->sae_pwe;
1128 int id_in_use;
1129 bool sae_pk = false;
1130
1131 id_in_use = hostapd_sae_pw_id_in_use(hapd->conf);
1132 if (id_in_use == 2 && sae_pwe != SAE_PWE_FORCE_HUNT_AND_PECK)
1133 sae_pwe = SAE_PWE_HASH_TO_ELEMENT;
1134 else if (id_in_use == 1 && sae_pwe == SAE_PWE_HUNT_AND_PECK)
1135 sae_pwe = SAE_PWE_BOTH;
1136 #ifdef CONFIG_SAE_PK
1137 sae_pk = hostapd_sae_pk_in_use(hapd->conf);
1138 if (sae_pwe == SAE_PWE_HUNT_AND_PECK && sae_pk)
1139 sae_pwe = SAE_PWE_BOTH;
1140 #endif /* CONFIG_SAE_PK */
1141 if (sae_pwe == SAE_PWE_HUNT_AND_PECK &&
1142 (hapd->conf->wpa_key_mgmt &
1143 (WPA_KEY_MGMT_SAE_EXT_KEY | WPA_KEY_MGMT_FT_SAE_EXT_KEY)))
1144 sae_pwe = SAE_PWE_BOTH;
1145
1146 return ((sae_pwe == SAE_PWE_HUNT_AND_PECK ||
1147 sae_pwe == SAE_PWE_FORCE_HUNT_AND_PECK) &&
1148 status_code == WLAN_STATUS_SUCCESS) ||
1149 (sae_pwe == SAE_PWE_HASH_TO_ELEMENT &&
1150 (status_code == WLAN_STATUS_SAE_HASH_TO_ELEMENT ||
1151 (sae_pk && status_code == WLAN_STATUS_SAE_PK))) ||
1152 (sae_pwe == SAE_PWE_BOTH &&
1153 (status_code == WLAN_STATUS_SUCCESS ||
1154 status_code == WLAN_STATUS_SAE_HASH_TO_ELEMENT ||
1155 (sae_pk && status_code == WLAN_STATUS_SAE_PK)));
1156 }
1157
1158
sae_is_group_enabled(struct hostapd_data * hapd,int group)1159 static int sae_is_group_enabled(struct hostapd_data *hapd, int group)
1160 {
1161 int *groups = hapd->conf->sae_groups;
1162 int default_groups[] = { 19, 0 };
1163 int i;
1164
1165 if (!groups)
1166 groups = default_groups;
1167
1168 for (i = 0; groups[i] > 0; i++) {
1169 if (groups[i] == group)
1170 return 1;
1171 }
1172
1173 return 0;
1174 }
1175
1176
check_sae_rejected_groups(struct hostapd_data * hapd,struct sae_data * sae)1177 static int check_sae_rejected_groups(struct hostapd_data *hapd,
1178 struct sae_data *sae)
1179 {
1180 const struct wpabuf *groups;
1181 size_t i, count;
1182 const u8 *pos;
1183
1184 if (!sae->tmp)
1185 return 0;
1186 groups = sae->tmp->peer_rejected_groups;
1187 if (!groups)
1188 return 0;
1189
1190 pos = wpabuf_head(groups);
1191 count = wpabuf_len(groups) / 2;
1192 for (i = 0; i < count; i++) {
1193 int enabled;
1194 u16 group;
1195
1196 group = WPA_GET_LE16(pos);
1197 pos += 2;
1198 enabled = sae_is_group_enabled(hapd, group);
1199 wpa_printf(MSG_DEBUG, "SAE: Rejected group %u is %s",
1200 group, enabled ? "enabled" : "disabled");
1201 if (enabled)
1202 return 1;
1203 }
1204
1205 return 0;
1206 }
1207
1208
handle_auth_sae(struct hostapd_data * hapd,struct sta_info * sta,const struct ieee80211_mgmt * mgmt,size_t len,u16 auth_transaction,u16 status_code)1209 static void handle_auth_sae(struct hostapd_data *hapd, struct sta_info *sta,
1210 const struct ieee80211_mgmt *mgmt, size_t len,
1211 u16 auth_transaction, u16 status_code)
1212 {
1213 int resp = WLAN_STATUS_SUCCESS;
1214 struct wpabuf *data = NULL;
1215 int *groups = hapd->conf->sae_groups;
1216 int default_groups[] = { 19, 0 };
1217 const u8 *pos, *end;
1218 int sta_removed = 0;
1219 bool success_status;
1220
1221 if (!groups)
1222 groups = default_groups;
1223
1224 #ifdef CONFIG_TESTING_OPTIONS
1225 if (hapd->conf->sae_reflection_attack && auth_transaction == 1) {
1226 wpa_printf(MSG_DEBUG, "SAE: TESTING - reflection attack");
1227 pos = mgmt->u.auth.variable;
1228 end = ((const u8 *) mgmt) + len;
1229 resp = status_code;
1230 send_auth_reply(hapd, sta, mgmt->sa, mgmt->bssid, WLAN_AUTH_SAE,
1231 auth_transaction, resp, pos, end - pos,
1232 "auth-sae-reflection-attack");
1233 goto remove_sta;
1234 }
1235
1236 if (hapd->conf->sae_commit_override && auth_transaction == 1) {
1237 wpa_printf(MSG_DEBUG, "SAE: TESTING - commit override");
1238 send_auth_reply(hapd, sta, mgmt->sa, mgmt->bssid, WLAN_AUTH_SAE,
1239 auth_transaction, resp,
1240 wpabuf_head(hapd->conf->sae_commit_override),
1241 wpabuf_len(hapd->conf->sae_commit_override),
1242 "sae-commit-override");
1243 goto remove_sta;
1244 }
1245 #endif /* CONFIG_TESTING_OPTIONS */
1246 if (!sta->sae) {
1247 if (auth_transaction != 1 ||
1248 !sae_status_success(hapd, status_code)) {
1249 wpa_printf(MSG_DEBUG, "SAE: Unexpected Status Code %u",
1250 status_code);
1251 resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
1252 goto reply;
1253 }
1254 sta->sae = os_zalloc(sizeof(*sta->sae));
1255 if (!sta->sae) {
1256 resp = -1;
1257 goto remove_sta;
1258 }
1259 sae_set_state(sta, SAE_NOTHING, "Init");
1260 sta->sae->sync = 0;
1261 }
1262
1263 if (sta->mesh_sae_pmksa_caching) {
1264 wpa_printf(MSG_DEBUG,
1265 "SAE: Cancel use of mesh PMKSA caching because peer starts SAE authentication");
1266 wpa_auth_pmksa_remove(hapd->wpa_auth, sta->addr);
1267 sta->mesh_sae_pmksa_caching = 0;
1268 }
1269
1270 if (auth_transaction == 1) {
1271 const u8 *token = NULL;
1272 size_t token_len = 0;
1273 int allow_reuse = 0;
1274
1275 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
1276 HOSTAPD_LEVEL_DEBUG,
1277 "start SAE authentication (RX commit, status=%u (%s))",
1278 status_code, status2str(status_code));
1279
1280 if ((hapd->conf->mesh & MESH_ENABLED) &&
1281 status_code == WLAN_STATUS_ANTI_CLOGGING_TOKEN_REQ &&
1282 sta->sae->tmp) {
1283 pos = mgmt->u.auth.variable;
1284 end = ((const u8 *) mgmt) + len;
1285 if (pos + sizeof(le16) > end) {
1286 wpa_printf(MSG_ERROR,
1287 "SAE: Too short anti-clogging token request");
1288 resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
1289 goto reply;
1290 }
1291 resp = sae_group_allowed(sta->sae, groups,
1292 WPA_GET_LE16(pos));
1293 if (resp != WLAN_STATUS_SUCCESS) {
1294 wpa_printf(MSG_ERROR,
1295 "SAE: Invalid group in anti-clogging token request");
1296 goto reply;
1297 }
1298 pos += sizeof(le16);
1299
1300 wpabuf_free(sta->sae->tmp->anti_clogging_token);
1301 sta->sae->tmp->anti_clogging_token =
1302 wpabuf_alloc_copy(pos, end - pos);
1303 if (sta->sae->tmp->anti_clogging_token == NULL) {
1304 wpa_printf(MSG_ERROR,
1305 "SAE: Failed to alloc for anti-clogging token");
1306 resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
1307 goto remove_sta;
1308 }
1309
1310 /*
1311 * IEEE Std 802.11-2012, 11.3.8.6.4: If the Status code
1312 * is 76, a new Commit Message shall be constructed
1313 * with the Anti-Clogging Token from the received
1314 * Authentication frame, and the commit-scalar and
1315 * COMMIT-ELEMENT previously sent.
1316 */
1317 resp = auth_sae_send_commit(hapd, sta, mgmt->bssid, 0,
1318 status_code);
1319 if (resp != WLAN_STATUS_SUCCESS) {
1320 wpa_printf(MSG_ERROR,
1321 "SAE: Failed to send commit message");
1322 goto remove_sta;
1323 }
1324 sae_set_state(sta, SAE_COMMITTED,
1325 "Sent Commit (anti-clogging token case in mesh)");
1326 sta->sae->sync = 0;
1327 sae_set_retransmit_timer(hapd, sta);
1328 return;
1329 }
1330
1331 if ((hapd->conf->mesh & MESH_ENABLED) &&
1332 status_code ==
1333 WLAN_STATUS_FINITE_CYCLIC_GROUP_NOT_SUPPORTED &&
1334 sta->sae->tmp) {
1335 wpa_printf(MSG_DEBUG,
1336 "SAE: Peer did not accept our SAE group");
1337 sae_pick_next_group(hapd, sta);
1338 goto remove_sta;
1339 }
1340
1341 if (!sae_status_success(hapd, status_code))
1342 goto remove_sta;
1343
1344 if (!(hapd->conf->mesh & MESH_ENABLED) &&
1345 sta->sae->state == SAE_COMMITTED) {
1346 /* This is needed in the infrastructure BSS case to
1347 * address a sequence where a STA entry may remain in
1348 * hostapd across two attempts to do SAE authentication
1349 * by the same STA. The second attempt may end up trying
1350 * to use a different group and that would not be
1351 * allowed if we remain in Committed state with the
1352 * previously set parameters. */
1353 pos = mgmt->u.auth.variable;
1354 end = ((const u8 *) mgmt) + len;
1355 if (end - pos >= (int) sizeof(le16) &&
1356 sae_group_allowed(sta->sae, groups,
1357 WPA_GET_LE16(pos)) ==
1358 WLAN_STATUS_SUCCESS) {
1359 /* Do not waste resources deriving the same PWE
1360 * again since the same group is reused. */
1361 sae_set_state(sta, SAE_NOTHING,
1362 "Allow previous PWE to be reused");
1363 allow_reuse = 1;
1364 } else {
1365 sae_set_state(sta, SAE_NOTHING,
1366 "Clear existing state to allow restart");
1367 sae_clear_data(sta->sae);
1368 }
1369 }
1370
1371 resp = sae_parse_commit(sta->sae, mgmt->u.auth.variable,
1372 ((const u8 *) mgmt) + len -
1373 mgmt->u.auth.variable, &token,
1374 &token_len, groups, status_code ==
1375 WLAN_STATUS_SAE_HASH_TO_ELEMENT ||
1376 status_code == WLAN_STATUS_SAE_PK,
1377 NULL);
1378 if (resp == SAE_SILENTLY_DISCARD) {
1379 wpa_printf(MSG_DEBUG,
1380 "SAE: Drop commit message from " MACSTR " due to reflection attack",
1381 MAC2STR(sta->addr));
1382 goto remove_sta;
1383 }
1384
1385 if (resp == WLAN_STATUS_UNKNOWN_PASSWORD_IDENTIFIER) {
1386 wpa_msg(hapd->msg_ctx, MSG_INFO,
1387 WPA_EVENT_SAE_UNKNOWN_PASSWORD_IDENTIFIER
1388 MACSTR, MAC2STR(sta->addr));
1389 sae_clear_retransmit_timer(hapd, sta);
1390 sae_set_state(sta, SAE_NOTHING,
1391 "Unknown Password Identifier");
1392 goto remove_sta;
1393 }
1394
1395 if (token &&
1396 check_comeback_token(hapd->comeback_key,
1397 hapd->comeback_pending_idx, sta->addr,
1398 token, token_len)
1399 < 0) {
1400 wpa_printf(MSG_DEBUG, "SAE: Drop commit message with "
1401 "incorrect token from " MACSTR,
1402 MAC2STR(sta->addr));
1403 resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
1404 goto remove_sta;
1405 }
1406
1407 if (resp != WLAN_STATUS_SUCCESS)
1408 goto reply;
1409
1410 if (check_sae_rejected_groups(hapd, sta->sae)) {
1411 resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
1412 goto reply;
1413 }
1414
1415 if (!token && use_anti_clogging(hapd) && !allow_reuse) {
1416 int h2e = 0;
1417
1418 wpa_printf(MSG_DEBUG,
1419 "SAE: Request anti-clogging token from "
1420 MACSTR, MAC2STR(sta->addr));
1421 if (sta->sae->tmp)
1422 h2e = sta->sae->h2e;
1423 if (status_code == WLAN_STATUS_SAE_HASH_TO_ELEMENT ||
1424 status_code == WLAN_STATUS_SAE_PK)
1425 h2e = 1;
1426 data = auth_build_token_req(
1427 &hapd->last_comeback_key_update,
1428 hapd->comeback_key,
1429 hapd->comeback_idx,
1430 hapd->comeback_pending_idx,
1431 sizeof(hapd->comeback_pending_idx),
1432 sta->sae->group,
1433 sta->addr, h2e);
1434 resp = WLAN_STATUS_ANTI_CLOGGING_TOKEN_REQ;
1435 if (hapd->conf->mesh & MESH_ENABLED)
1436 sae_set_state(sta, SAE_NOTHING,
1437 "Request anti-clogging token case in mesh");
1438 goto reply;
1439 }
1440
1441 resp = sae_sm_step(hapd, sta, mgmt->bssid, auth_transaction,
1442 status_code, allow_reuse, &sta_removed);
1443 } else if (auth_transaction == 2) {
1444 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
1445 HOSTAPD_LEVEL_DEBUG,
1446 "SAE authentication (RX confirm, status=%u (%s))",
1447 status_code, status2str(status_code));
1448 if (status_code != WLAN_STATUS_SUCCESS)
1449 goto remove_sta;
1450 if (sta->sae->state >= SAE_CONFIRMED ||
1451 !(hapd->conf->mesh & MESH_ENABLED)) {
1452 const u8 *var;
1453 size_t var_len;
1454 u16 peer_send_confirm;
1455
1456 var = mgmt->u.auth.variable;
1457 var_len = ((u8 *) mgmt) + len - mgmt->u.auth.variable;
1458 if (var_len < 2) {
1459 resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
1460 goto reply;
1461 }
1462
1463 peer_send_confirm = WPA_GET_LE16(var);
1464
1465 if (sta->sae->state == SAE_ACCEPTED &&
1466 (peer_send_confirm <= sta->sae->rc ||
1467 peer_send_confirm == 0xffff)) {
1468 wpa_printf(MSG_DEBUG,
1469 "SAE: Silently ignore unexpected Confirm from peer "
1470 MACSTR
1471 " (peer-send-confirm=%u Rc=%u)",
1472 MAC2STR(sta->addr),
1473 peer_send_confirm, sta->sae->rc);
1474 return;
1475 }
1476
1477 if (sae_check_confirm(sta->sae, var, var_len,
1478 NULL) < 0) {
1479 resp = WLAN_STATUS_CHALLENGE_FAIL;
1480 goto reply;
1481 }
1482 sta->sae->rc = peer_send_confirm;
1483 }
1484 resp = sae_sm_step(hapd, sta, mgmt->bssid, auth_transaction,
1485 status_code, 0, &sta_removed);
1486 } else {
1487 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
1488 HOSTAPD_LEVEL_DEBUG,
1489 "unexpected SAE authentication transaction %u (status=%u (%s))",
1490 auth_transaction, status_code,
1491 status2str(status_code));
1492 if (status_code != WLAN_STATUS_SUCCESS)
1493 goto remove_sta;
1494 resp = WLAN_STATUS_UNKNOWN_AUTH_TRANSACTION;
1495 }
1496
1497 reply:
1498 if (!sta_removed && resp != WLAN_STATUS_SUCCESS) {
1499 pos = mgmt->u.auth.variable;
1500 end = ((const u8 *) mgmt) + len;
1501
1502 /* Copy the Finite Cyclic Group field from the request if we
1503 * rejected it as unsupported group. */
1504 if (resp == WLAN_STATUS_FINITE_CYCLIC_GROUP_NOT_SUPPORTED &&
1505 !data && end - pos >= 2)
1506 data = wpabuf_alloc_copy(pos, 2);
1507
1508 sae_sme_send_external_auth_status(hapd, sta, resp);
1509 send_auth_reply(hapd, sta, mgmt->sa, mgmt->bssid, WLAN_AUTH_SAE,
1510 auth_transaction, resp,
1511 data ? wpabuf_head(data) : (u8 *) "",
1512 data ? wpabuf_len(data) : 0, "auth-sae");
1513 }
1514
1515 remove_sta:
1516 if (auth_transaction == 1)
1517 success_status = sae_status_success(hapd, status_code);
1518 else
1519 success_status = status_code == WLAN_STATUS_SUCCESS;
1520 if (!sta_removed && sta->added_unassoc &&
1521 (resp != WLAN_STATUS_SUCCESS || !success_status)) {
1522 hostapd_drv_sta_remove(hapd, sta->addr);
1523 sta->added_unassoc = 0;
1524 }
1525 wpabuf_free(data);
1526 }
1527
1528
1529 /**
1530 * auth_sae_init_committed - Send COMMIT and start SAE in committed state
1531 * @hapd: BSS data for the device initiating the authentication
1532 * @sta: the peer to which commit authentication frame is sent
1533 *
1534 * This function implements Init event handling (IEEE Std 802.11-2012,
1535 * 11.3.8.6.3) in which initial COMMIT message is sent. Prior to calling, the
1536 * sta->sae structure should be initialized appropriately via a call to
1537 * sae_prepare_commit().
1538 */
auth_sae_init_committed(struct hostapd_data * hapd,struct sta_info * sta)1539 int auth_sae_init_committed(struct hostapd_data *hapd, struct sta_info *sta)
1540 {
1541 int ret;
1542
1543 if (!sta->sae || !sta->sae->tmp)
1544 return -1;
1545
1546 if (sta->sae->state != SAE_NOTHING)
1547 return -1;
1548
1549 ret = auth_sae_send_commit(hapd, sta, hapd->own_addr, 0, -1);
1550 if (ret)
1551 return -1;
1552
1553 sae_set_state(sta, SAE_COMMITTED, "Init and sent commit");
1554 sta->sae->sync = 0;
1555 sae_set_retransmit_timer(hapd, sta);
1556
1557 return 0;
1558 }
1559
1560
auth_sae_process_commit(void * eloop_ctx,void * user_ctx)1561 void auth_sae_process_commit(void *eloop_ctx, void *user_ctx)
1562 {
1563 struct hostapd_data *hapd = eloop_ctx;
1564 struct hostapd_sae_commit_queue *q;
1565 unsigned int queue_len;
1566
1567 q = dl_list_first(&hapd->sae_commit_queue,
1568 struct hostapd_sae_commit_queue, list);
1569 if (!q)
1570 return;
1571 wpa_printf(MSG_DEBUG,
1572 "SAE: Process next available message from queue");
1573 dl_list_del(&q->list);
1574 handle_auth(hapd, (const struct ieee80211_mgmt *) q->msg, q->len,
1575 q->rssi, 1);
1576 os_free(q);
1577
1578 if (eloop_is_timeout_registered(auth_sae_process_commit, hapd, NULL))
1579 return;
1580 queue_len = dl_list_len(&hapd->sae_commit_queue);
1581 eloop_register_timeout(0, queue_len * 10000, auth_sae_process_commit,
1582 hapd, NULL);
1583 }
1584
1585
auth_sae_queue(struct hostapd_data * hapd,const struct ieee80211_mgmt * mgmt,size_t len,int rssi)1586 static void auth_sae_queue(struct hostapd_data *hapd,
1587 const struct ieee80211_mgmt *mgmt, size_t len,
1588 int rssi)
1589 {
1590 struct hostapd_sae_commit_queue *q, *q2;
1591 unsigned int queue_len;
1592 const struct ieee80211_mgmt *mgmt2;
1593
1594 queue_len = dl_list_len(&hapd->sae_commit_queue);
1595 if (queue_len >= 15) {
1596 wpa_printf(MSG_DEBUG,
1597 "SAE: No more room in message queue - drop the new frame from "
1598 MACSTR, MAC2STR(mgmt->sa));
1599 return;
1600 }
1601
1602 wpa_printf(MSG_DEBUG, "SAE: Queue Authentication message from "
1603 MACSTR " for processing (queue_len %u)", MAC2STR(mgmt->sa),
1604 queue_len);
1605 q = os_zalloc(sizeof(*q) + len);
1606 if (!q)
1607 return;
1608 q->rssi = rssi;
1609 q->len = len;
1610 os_memcpy(q->msg, mgmt, len);
1611
1612 /* Check whether there is already a queued Authentication frame from the
1613 * same station with the same transaction number and if so, replace that
1614 * queue entry with the new one. This avoids issues with a peer that
1615 * sends multiple times (e.g., due to frequent SAE retries). There is no
1616 * point in us trying to process the old attempts after a new one has
1617 * obsoleted them. */
1618 dl_list_for_each(q2, &hapd->sae_commit_queue,
1619 struct hostapd_sae_commit_queue, list) {
1620 mgmt2 = (const struct ieee80211_mgmt *) q2->msg;
1621 if (os_memcmp(mgmt->sa, mgmt2->sa, ETH_ALEN) == 0 &&
1622 mgmt->u.auth.auth_transaction ==
1623 mgmt2->u.auth.auth_transaction) {
1624 wpa_printf(MSG_DEBUG,
1625 "SAE: Replace queued message from same STA with same transaction number");
1626 dl_list_add(&q2->list, &q->list);
1627 dl_list_del(&q2->list);
1628 os_free(q2);
1629 goto queued;
1630 }
1631 }
1632
1633 /* No pending identical entry, so add to the end of the queue */
1634 dl_list_add_tail(&hapd->sae_commit_queue, &q->list);
1635
1636 queued:
1637 if (eloop_is_timeout_registered(auth_sae_process_commit, hapd, NULL))
1638 return;
1639 eloop_register_timeout(0, queue_len * 10000, auth_sae_process_commit,
1640 hapd, NULL);
1641 }
1642
1643
auth_sae_queued_addr(struct hostapd_data * hapd,const u8 * addr)1644 static int auth_sae_queued_addr(struct hostapd_data *hapd, const u8 *addr)
1645 {
1646 struct hostapd_sae_commit_queue *q;
1647 const struct ieee80211_mgmt *mgmt;
1648
1649 dl_list_for_each(q, &hapd->sae_commit_queue,
1650 struct hostapd_sae_commit_queue, list) {
1651 mgmt = (const struct ieee80211_mgmt *) q->msg;
1652 if (os_memcmp(addr, mgmt->sa, ETH_ALEN) == 0)
1653 return 1;
1654 }
1655
1656 return 0;
1657 }
1658
1659 #endif /* CONFIG_SAE */
1660
1661
wpa_res_to_status_code(enum wpa_validate_result res)1662 static u16 wpa_res_to_status_code(enum wpa_validate_result res)
1663 {
1664 switch (res) {
1665 case WPA_IE_OK:
1666 return WLAN_STATUS_SUCCESS;
1667 case WPA_INVALID_IE:
1668 return WLAN_STATUS_INVALID_IE;
1669 case WPA_INVALID_GROUP:
1670 return WLAN_STATUS_GROUP_CIPHER_NOT_VALID;
1671 case WPA_INVALID_PAIRWISE:
1672 return WLAN_STATUS_PAIRWISE_CIPHER_NOT_VALID;
1673 case WPA_INVALID_AKMP:
1674 return WLAN_STATUS_AKMP_NOT_VALID;
1675 case WPA_NOT_ENABLED:
1676 return WLAN_STATUS_INVALID_IE;
1677 case WPA_ALLOC_FAIL:
1678 return WLAN_STATUS_UNSPECIFIED_FAILURE;
1679 case WPA_MGMT_FRAME_PROTECTION_VIOLATION:
1680 return WLAN_STATUS_ROBUST_MGMT_FRAME_POLICY_VIOLATION;
1681 case WPA_INVALID_MGMT_GROUP_CIPHER:
1682 return WLAN_STATUS_CIPHER_REJECTED_PER_POLICY;
1683 case WPA_INVALID_MDIE:
1684 return WLAN_STATUS_INVALID_MDIE;
1685 case WPA_INVALID_PROTO:
1686 return WLAN_STATUS_INVALID_IE;
1687 case WPA_INVALID_PMKID:
1688 return WLAN_STATUS_INVALID_PMKID;
1689 case WPA_DENIED_OTHER_REASON:
1690 return WLAN_STATUS_ASSOC_DENIED_UNSPEC;
1691 }
1692 return WLAN_STATUS_INVALID_IE;
1693 }
1694
1695
1696 #ifdef CONFIG_FILS
1697
1698 static void handle_auth_fils_finish(struct hostapd_data *hapd,
1699 struct sta_info *sta, u16 resp,
1700 struct wpabuf *data, int pub);
1701
handle_auth_fils(struct hostapd_data * hapd,struct sta_info * sta,const u8 * pos,size_t len,u16 auth_alg,u16 auth_transaction,u16 status_code,void (* cb)(struct hostapd_data * hapd,struct sta_info * sta,u16 resp,struct wpabuf * data,int pub))1702 void handle_auth_fils(struct hostapd_data *hapd, struct sta_info *sta,
1703 const u8 *pos, size_t len, u16 auth_alg,
1704 u16 auth_transaction, u16 status_code,
1705 void (*cb)(struct hostapd_data *hapd,
1706 struct sta_info *sta, u16 resp,
1707 struct wpabuf *data, int pub))
1708 {
1709 u16 resp = WLAN_STATUS_SUCCESS;
1710 const u8 *end;
1711 struct ieee802_11_elems elems;
1712 enum wpa_validate_result res;
1713 struct wpa_ie_data rsn;
1714 struct rsn_pmksa_cache_entry *pmksa = NULL;
1715
1716 if (auth_transaction != 1 || status_code != WLAN_STATUS_SUCCESS)
1717 return;
1718
1719 end = pos + len;
1720
1721 wpa_hexdump(MSG_DEBUG, "FILS: Authentication frame fields",
1722 pos, end - pos);
1723
1724 /* TODO: FILS PK */
1725 #ifdef CONFIG_FILS_SK_PFS
1726 if (auth_alg == WLAN_AUTH_FILS_SK_PFS) {
1727 u16 group;
1728 struct wpabuf *pub;
1729 size_t elem_len;
1730
1731 /* Using FILS PFS */
1732
1733 /* Finite Cyclic Group */
1734 if (end - pos < 2) {
1735 wpa_printf(MSG_DEBUG,
1736 "FILS: No room for Finite Cyclic Group");
1737 resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
1738 goto fail;
1739 }
1740 group = WPA_GET_LE16(pos);
1741 pos += 2;
1742 if (group != hapd->conf->fils_dh_group) {
1743 wpa_printf(MSG_DEBUG,
1744 "FILS: Unsupported Finite Cyclic Group: %u (expected %u)",
1745 group, hapd->conf->fils_dh_group);
1746 resp = WLAN_STATUS_FINITE_CYCLIC_GROUP_NOT_SUPPORTED;
1747 goto fail;
1748 }
1749
1750 crypto_ecdh_deinit(sta->fils_ecdh);
1751 sta->fils_ecdh = crypto_ecdh_init(group);
1752 if (!sta->fils_ecdh) {
1753 wpa_printf(MSG_INFO,
1754 "FILS: Could not initialize ECDH with group %d",
1755 group);
1756 resp = WLAN_STATUS_FINITE_CYCLIC_GROUP_NOT_SUPPORTED;
1757 goto fail;
1758 }
1759
1760 pub = crypto_ecdh_get_pubkey(sta->fils_ecdh, 1);
1761 if (!pub) {
1762 wpa_printf(MSG_DEBUG,
1763 "FILS: Failed to derive ECDH public key");
1764 resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
1765 goto fail;
1766 }
1767 elem_len = wpabuf_len(pub);
1768 wpabuf_free(pub);
1769
1770 /* Element */
1771 if ((size_t) (end - pos) < elem_len) {
1772 wpa_printf(MSG_DEBUG, "FILS: No room for Element");
1773 resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
1774 goto fail;
1775 }
1776
1777 wpabuf_free(sta->fils_g_sta);
1778 sta->fils_g_sta = wpabuf_alloc_copy(pos, elem_len);
1779 wpabuf_clear_free(sta->fils_dh_ss);
1780 sta->fils_dh_ss = crypto_ecdh_set_peerkey(sta->fils_ecdh, 1,
1781 pos, elem_len);
1782 if (!sta->fils_dh_ss) {
1783 wpa_printf(MSG_DEBUG, "FILS: ECDH operation failed");
1784 resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
1785 goto fail;
1786 }
1787 wpa_hexdump_buf_key(MSG_DEBUG, "FILS: DH_SS", sta->fils_dh_ss);
1788 pos += elem_len;
1789 } else {
1790 crypto_ecdh_deinit(sta->fils_ecdh);
1791 sta->fils_ecdh = NULL;
1792 wpabuf_clear_free(sta->fils_dh_ss);
1793 sta->fils_dh_ss = NULL;
1794 }
1795 #endif /* CONFIG_FILS_SK_PFS */
1796
1797 wpa_hexdump(MSG_DEBUG, "FILS: Remaining IEs", pos, end - pos);
1798 if (ieee802_11_parse_elems(pos, end - pos, &elems, 1) == ParseFailed) {
1799 wpa_printf(MSG_DEBUG, "FILS: Could not parse elements");
1800 resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
1801 goto fail;
1802 }
1803
1804 /* RSNE */
1805 wpa_hexdump(MSG_DEBUG, "FILS: RSN element",
1806 elems.rsn_ie, elems.rsn_ie_len);
1807 if (!elems.rsn_ie ||
1808 wpa_parse_wpa_ie_rsn(elems.rsn_ie - 2, elems.rsn_ie_len + 2,
1809 &rsn) < 0) {
1810 wpa_printf(MSG_DEBUG, "FILS: No valid RSN element");
1811 resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
1812 goto fail;
1813 }
1814
1815 if (!sta->wpa_sm)
1816 sta->wpa_sm = wpa_auth_sta_init(hapd->wpa_auth, sta->addr,
1817 NULL);
1818 if (!sta->wpa_sm) {
1819 wpa_printf(MSG_DEBUG,
1820 "FILS: Failed to initialize RSN state machine");
1821 resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
1822 goto fail;
1823 }
1824
1825 res = wpa_validate_wpa_ie(hapd->wpa_auth, sta->wpa_sm,
1826 hapd->iface->freq,
1827 elems.rsn_ie - 2, elems.rsn_ie_len + 2,
1828 elems.rsnxe ? elems.rsnxe - 2 : NULL,
1829 elems.rsnxe ? elems.rsnxe_len + 2 : 0,
1830 elems.mdie, elems.mdie_len, NULL, 0);
1831 resp = wpa_res_to_status_code(res);
1832 if (resp != WLAN_STATUS_SUCCESS)
1833 goto fail;
1834
1835 if (!elems.fils_nonce) {
1836 wpa_printf(MSG_DEBUG, "FILS: No FILS Nonce field");
1837 resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
1838 goto fail;
1839 }
1840 wpa_hexdump(MSG_DEBUG, "FILS: SNonce", elems.fils_nonce,
1841 FILS_NONCE_LEN);
1842 os_memcpy(sta->fils_snonce, elems.fils_nonce, FILS_NONCE_LEN);
1843
1844 /* PMKID List */
1845 if (rsn.pmkid && rsn.num_pmkid > 0) {
1846 u8 num;
1847 const u8 *pmkid;
1848
1849 wpa_hexdump(MSG_DEBUG, "FILS: PMKID List",
1850 rsn.pmkid, rsn.num_pmkid * PMKID_LEN);
1851
1852 pmkid = rsn.pmkid;
1853 num = rsn.num_pmkid;
1854 while (num) {
1855 wpa_hexdump(MSG_DEBUG, "FILS: PMKID", pmkid, PMKID_LEN);
1856 pmksa = wpa_auth_pmksa_get(hapd->wpa_auth, sta->addr,
1857 pmkid);
1858 if (pmksa)
1859 break;
1860 pmksa = wpa_auth_pmksa_get_fils_cache_id(hapd->wpa_auth,
1861 sta->addr,
1862 pmkid);
1863 if (pmksa)
1864 break;
1865 pmkid += PMKID_LEN;
1866 num--;
1867 }
1868 }
1869 if (pmksa && wpa_auth_sta_key_mgmt(sta->wpa_sm) != pmksa->akmp) {
1870 wpa_printf(MSG_DEBUG,
1871 "FILS: Matching PMKSA cache entry has different AKMP (0x%x != 0x%x) - ignore",
1872 wpa_auth_sta_key_mgmt(sta->wpa_sm), pmksa->akmp);
1873 pmksa = NULL;
1874 }
1875 if (pmksa)
1876 wpa_printf(MSG_DEBUG, "FILS: Found matching PMKSA cache entry");
1877
1878 /* FILS Session */
1879 if (!elems.fils_session) {
1880 wpa_printf(MSG_DEBUG, "FILS: No FILS Session element");
1881 resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
1882 goto fail;
1883 }
1884 wpa_hexdump(MSG_DEBUG, "FILS: FILS Session", elems.fils_session,
1885 FILS_SESSION_LEN);
1886 os_memcpy(sta->fils_session, elems.fils_session, FILS_SESSION_LEN);
1887
1888 /* Wrapped Data */
1889 if (elems.wrapped_data) {
1890 wpa_hexdump(MSG_DEBUG, "FILS: Wrapped Data",
1891 elems.wrapped_data,
1892 elems.wrapped_data_len);
1893 if (!pmksa) {
1894 #ifndef CONFIG_NO_RADIUS
1895 if (!sta->eapol_sm) {
1896 sta->eapol_sm =
1897 ieee802_1x_alloc_eapol_sm(hapd, sta);
1898 }
1899 wpa_printf(MSG_DEBUG,
1900 "FILS: Forward EAP-Initiate/Re-auth to authentication server");
1901 ieee802_1x_encapsulate_radius(
1902 hapd, sta, elems.wrapped_data,
1903 elems.wrapped_data_len);
1904 sta->fils_pending_cb = cb;
1905 wpa_printf(MSG_DEBUG,
1906 "FILS: Will send Authentication frame once the response from authentication server is available");
1907 sta->flags |= WLAN_STA_PENDING_FILS_ERP;
1908 /* Calculate pending PMKID here so that we do not need
1909 * to maintain a copy of the EAP-Initiate/Reauth
1910 * message. */
1911 if (fils_pmkid_erp(wpa_auth_sta_key_mgmt(sta->wpa_sm),
1912 elems.wrapped_data,
1913 elems.wrapped_data_len,
1914 sta->fils_erp_pmkid) == 0)
1915 sta->fils_erp_pmkid_set = 1;
1916 return;
1917 #else /* CONFIG_NO_RADIUS */
1918 resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
1919 goto fail;
1920 #endif /* CONFIG_NO_RADIUS */
1921 }
1922 }
1923
1924 fail:
1925 if (cb) {
1926 struct wpabuf *data;
1927 int pub = 0;
1928
1929 data = prepare_auth_resp_fils(hapd, sta, &resp, pmksa, NULL,
1930 NULL, 0, &pub);
1931 if (!data) {
1932 wpa_printf(MSG_DEBUG,
1933 "%s: prepare_auth_resp_fils() returned failure",
1934 __func__);
1935 }
1936
1937 cb(hapd, sta, resp, data, pub);
1938 }
1939 }
1940
1941
1942 static struct wpabuf *
prepare_auth_resp_fils(struct hostapd_data * hapd,struct sta_info * sta,u16 * resp,struct rsn_pmksa_cache_entry * pmksa,struct wpabuf * erp_resp,const u8 * msk,size_t msk_len,int * is_pub)1943 prepare_auth_resp_fils(struct hostapd_data *hapd,
1944 struct sta_info *sta, u16 *resp,
1945 struct rsn_pmksa_cache_entry *pmksa,
1946 struct wpabuf *erp_resp,
1947 const u8 *msk, size_t msk_len,
1948 int *is_pub)
1949 {
1950 u8 fils_nonce[FILS_NONCE_LEN];
1951 size_t ielen;
1952 struct wpabuf *data = NULL;
1953 const u8 *ie;
1954 u8 *ie_buf = NULL;
1955 const u8 *pmk = NULL;
1956 size_t pmk_len = 0;
1957 u8 pmk_buf[PMK_LEN_MAX];
1958 struct wpabuf *pub = NULL;
1959
1960 if (*resp != WLAN_STATUS_SUCCESS)
1961 goto fail;
1962
1963 ie = wpa_auth_get_wpa_ie(hapd->wpa_auth, &ielen);
1964 if (!ie) {
1965 *resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
1966 goto fail;
1967 }
1968
1969 if (pmksa) {
1970 /* Add PMKID of the selected PMKSA into RSNE */
1971 ie_buf = os_malloc(ielen + 2 + 2 + PMKID_LEN);
1972 if (!ie_buf) {
1973 *resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
1974 goto fail;
1975 }
1976
1977 os_memcpy(ie_buf, ie, ielen);
1978 if (wpa_insert_pmkid(ie_buf, &ielen, pmksa->pmkid) < 0) {
1979 *resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
1980 goto fail;
1981 }
1982 ie = ie_buf;
1983 }
1984
1985 if (random_get_bytes(fils_nonce, FILS_NONCE_LEN) < 0) {
1986 *resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
1987 goto fail;
1988 }
1989 wpa_hexdump(MSG_DEBUG, "RSN: Generated FILS Nonce",
1990 fils_nonce, FILS_NONCE_LEN);
1991
1992 #ifdef CONFIG_FILS_SK_PFS
1993 if (sta->fils_dh_ss && sta->fils_ecdh) {
1994 pub = crypto_ecdh_get_pubkey(sta->fils_ecdh, 1);
1995 if (!pub) {
1996 *resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
1997 goto fail;
1998 }
1999 }
2000 #endif /* CONFIG_FILS_SK_PFS */
2001
2002 data = wpabuf_alloc(1000 + ielen + (pub ? wpabuf_len(pub) : 0));
2003 if (!data) {
2004 *resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
2005 goto fail;
2006 }
2007
2008 /* TODO: FILS PK */
2009 #ifdef CONFIG_FILS_SK_PFS
2010 if (pub) {
2011 /* Finite Cyclic Group */
2012 wpabuf_put_le16(data, hapd->conf->fils_dh_group);
2013
2014 /* Element */
2015 wpabuf_put_buf(data, pub);
2016 }
2017 #endif /* CONFIG_FILS_SK_PFS */
2018
2019 /* RSNE */
2020 wpabuf_put_data(data, ie, ielen);
2021
2022 /* MDE when using FILS+FT (already included in ie,ielen with RSNE) */
2023
2024 #ifdef CONFIG_IEEE80211R_AP
2025 if (wpa_key_mgmt_ft(wpa_auth_sta_key_mgmt(sta->wpa_sm))) {
2026 /* FTE[R1KH-ID,R0KH-ID] when using FILS+FT */
2027 int res;
2028
2029 res = wpa_auth_write_fte(hapd->wpa_auth, sta->wpa_sm,
2030 wpabuf_put(data, 0),
2031 wpabuf_tailroom(data));
2032 if (res < 0) {
2033 *resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
2034 goto fail;
2035 }
2036 wpabuf_put(data, res);
2037 }
2038 #endif /* CONFIG_IEEE80211R_AP */
2039
2040 /* FILS Nonce */
2041 wpabuf_put_u8(data, WLAN_EID_EXTENSION); /* Element ID */
2042 wpabuf_put_u8(data, 1 + FILS_NONCE_LEN); /* Length */
2043 /* Element ID Extension */
2044 wpabuf_put_u8(data, WLAN_EID_EXT_FILS_NONCE);
2045 wpabuf_put_data(data, fils_nonce, FILS_NONCE_LEN);
2046
2047 /* FILS Session */
2048 wpabuf_put_u8(data, WLAN_EID_EXTENSION); /* Element ID */
2049 wpabuf_put_u8(data, 1 + FILS_SESSION_LEN); /* Length */
2050 /* Element ID Extension */
2051 wpabuf_put_u8(data, WLAN_EID_EXT_FILS_SESSION);
2052 wpabuf_put_data(data, sta->fils_session, FILS_SESSION_LEN);
2053
2054 /* Wrapped Data */
2055 if (!pmksa && erp_resp) {
2056 wpabuf_put_u8(data, WLAN_EID_EXTENSION); /* Element ID */
2057 wpabuf_put_u8(data, 1 + wpabuf_len(erp_resp)); /* Length */
2058 /* Element ID Extension */
2059 wpabuf_put_u8(data, WLAN_EID_EXT_WRAPPED_DATA);
2060 wpabuf_put_buf(data, erp_resp);
2061
2062 if (fils_rmsk_to_pmk(wpa_auth_sta_key_mgmt(sta->wpa_sm),
2063 msk, msk_len, sta->fils_snonce, fils_nonce,
2064 sta->fils_dh_ss ?
2065 wpabuf_head(sta->fils_dh_ss) : NULL,
2066 sta->fils_dh_ss ?
2067 wpabuf_len(sta->fils_dh_ss) : 0,
2068 pmk_buf, &pmk_len)) {
2069 wpa_printf(MSG_DEBUG, "FILS: Failed to derive PMK");
2070 *resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
2071 wpabuf_free(data);
2072 data = NULL;
2073 goto fail;
2074 }
2075 pmk = pmk_buf;
2076
2077 /* Don't use DHss in PTK derivation if PMKSA caching is not
2078 * used. */
2079 wpabuf_clear_free(sta->fils_dh_ss);
2080 sta->fils_dh_ss = NULL;
2081
2082 if (sta->fils_erp_pmkid_set) {
2083 /* TODO: get PMKLifetime from WPA parameters */
2084 unsigned int dot11RSNAConfigPMKLifetime = 43200;
2085 int session_timeout;
2086
2087 session_timeout = dot11RSNAConfigPMKLifetime;
2088 if (sta->session_timeout_set) {
2089 struct os_reltime now, diff;
2090
2091 os_get_reltime(&now);
2092 os_reltime_sub(&sta->session_timeout, &now,
2093 &diff);
2094 session_timeout = diff.sec;
2095 }
2096
2097 sta->fils_erp_pmkid_set = 0;
2098 wpa_auth_add_fils_pmk_pmkid(sta->wpa_sm, pmk, pmk_len,
2099 sta->fils_erp_pmkid);
2100 if (!hapd->conf->disable_pmksa_caching &&
2101 wpa_auth_pmksa_add2(
2102 hapd->wpa_auth, sta->addr,
2103 pmk, pmk_len,
2104 sta->fils_erp_pmkid,
2105 session_timeout,
2106 wpa_auth_sta_key_mgmt(sta->wpa_sm)) < 0) {
2107 wpa_printf(MSG_ERROR,
2108 "FILS: Failed to add PMKSA cache entry based on ERP");
2109 }
2110 }
2111 } else if (pmksa) {
2112 pmk = pmksa->pmk;
2113 pmk_len = pmksa->pmk_len;
2114 }
2115
2116 if (!pmk) {
2117 wpa_printf(MSG_DEBUG, "FILS: No PMK available");
2118 *resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
2119 wpabuf_free(data);
2120 data = NULL;
2121 goto fail;
2122 }
2123
2124 if (fils_auth_pmk_to_ptk(sta->wpa_sm, pmk, pmk_len,
2125 sta->fils_snonce, fils_nonce,
2126 sta->fils_dh_ss ?
2127 wpabuf_head(sta->fils_dh_ss) : NULL,
2128 sta->fils_dh_ss ?
2129 wpabuf_len(sta->fils_dh_ss) : 0,
2130 sta->fils_g_sta, pub) < 0) {
2131 *resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
2132 wpabuf_free(data);
2133 data = NULL;
2134 goto fail;
2135 }
2136
2137 fail:
2138 if (is_pub)
2139 *is_pub = pub != NULL;
2140 os_free(ie_buf);
2141 wpabuf_free(pub);
2142 wpabuf_clear_free(sta->fils_dh_ss);
2143 sta->fils_dh_ss = NULL;
2144 #ifdef CONFIG_FILS_SK_PFS
2145 crypto_ecdh_deinit(sta->fils_ecdh);
2146 sta->fils_ecdh = NULL;
2147 #endif /* CONFIG_FILS_SK_PFS */
2148 return data;
2149 }
2150
2151
handle_auth_fils_finish(struct hostapd_data * hapd,struct sta_info * sta,u16 resp,struct wpabuf * data,int pub)2152 static void handle_auth_fils_finish(struct hostapd_data *hapd,
2153 struct sta_info *sta, u16 resp,
2154 struct wpabuf *data, int pub)
2155 {
2156 u16 auth_alg;
2157
2158 auth_alg = (pub ||
2159 resp == WLAN_STATUS_FINITE_CYCLIC_GROUP_NOT_SUPPORTED) ?
2160 WLAN_AUTH_FILS_SK_PFS : WLAN_AUTH_FILS_SK;
2161 send_auth_reply(hapd, sta, sta->addr, hapd->own_addr, auth_alg, 2, resp,
2162 data ? wpabuf_head(data) : (u8 *) "",
2163 data ? wpabuf_len(data) : 0, "auth-fils-finish");
2164 wpabuf_free(data);
2165
2166 if (resp == WLAN_STATUS_SUCCESS) {
2167 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
2168 HOSTAPD_LEVEL_DEBUG,
2169 "authentication OK (FILS)");
2170 sta->flags |= WLAN_STA_AUTH;
2171 wpa_auth_sm_event(sta->wpa_sm, WPA_AUTH);
2172 sta->auth_alg = pub ? WLAN_AUTH_FILS_SK_PFS : WLAN_AUTH_FILS_SK;
2173 mlme_authenticate_indication(hapd, sta);
2174 }
2175 }
2176
2177
ieee802_11_finish_fils_auth(struct hostapd_data * hapd,struct sta_info * sta,int success,struct wpabuf * erp_resp,const u8 * msk,size_t msk_len)2178 void ieee802_11_finish_fils_auth(struct hostapd_data *hapd,
2179 struct sta_info *sta, int success,
2180 struct wpabuf *erp_resp,
2181 const u8 *msk, size_t msk_len)
2182 {
2183 u16 resp;
2184 u32 flags = sta->flags;
2185
2186 sta->flags &= ~(WLAN_STA_PENDING_FILS_ERP |
2187 WLAN_STA_PENDING_PASN_FILS_ERP);
2188
2189 resp = success ? WLAN_STATUS_SUCCESS : WLAN_STATUS_UNSPECIFIED_FAILURE;
2190
2191 if (flags & WLAN_STA_PENDING_FILS_ERP) {
2192 struct wpabuf *data;
2193 int pub = 0;
2194
2195 if (!sta->fils_pending_cb)
2196 return;
2197
2198 data = prepare_auth_resp_fils(hapd, sta, &resp, NULL, erp_resp,
2199 msk, msk_len, &pub);
2200 if (!data) {
2201 wpa_printf(MSG_DEBUG,
2202 "%s: prepare_auth_resp_fils() failure",
2203 __func__);
2204 }
2205 sta->fils_pending_cb(hapd, sta, resp, data, pub);
2206 #ifdef CONFIG_PASN
2207 } else if (flags & WLAN_STA_PENDING_PASN_FILS_ERP) {
2208 pasn_fils_auth_resp(hapd, sta, resp, erp_resp,
2209 msk, msk_len);
2210 #endif /* CONFIG_PASN */
2211 }
2212 }
2213
2214 #endif /* CONFIG_FILS */
2215
2216
ieee802_11_allowed_address(struct hostapd_data * hapd,const u8 * addr,const u8 * msg,size_t len,struct radius_sta * info)2217 static int ieee802_11_allowed_address(struct hostapd_data *hapd, const u8 *addr,
2218 const u8 *msg, size_t len,
2219 struct radius_sta *info)
2220 {
2221 int res;
2222
2223 res = hostapd_allowed_address(hapd, addr, msg, len, info, 0);
2224
2225 if (res == HOSTAPD_ACL_REJECT) {
2226 wpa_printf(MSG_DEBUG, "Station " MACSTR
2227 " not allowed to authenticate",
2228 MAC2STR(addr));
2229 return HOSTAPD_ACL_REJECT;
2230 }
2231
2232 if (res == HOSTAPD_ACL_PENDING) {
2233 wpa_printf(MSG_DEBUG, "Authentication frame from " MACSTR
2234 " waiting for an external authentication",
2235 MAC2STR(addr));
2236 /* Authentication code will re-send the authentication frame
2237 * after it has received (and cached) information from the
2238 * external source. */
2239 return HOSTAPD_ACL_PENDING;
2240 }
2241
2242 return res;
2243 }
2244
2245
ieee802_11_set_radius_info(struct hostapd_data * hapd,struct sta_info * sta,int res,struct radius_sta * info)2246 int ieee802_11_set_radius_info(struct hostapd_data *hapd, struct sta_info *sta,
2247 int res, struct radius_sta *info)
2248 {
2249 u32 session_timeout = info->session_timeout;
2250 u32 acct_interim_interval = info->acct_interim_interval;
2251 struct vlan_description *vlan_id = &info->vlan_id;
2252 struct hostapd_sta_wpa_psk_short *psk = info->psk;
2253 char *identity = info->identity;
2254 char *radius_cui = info->radius_cui;
2255
2256 if (vlan_id->notempty &&
2257 !hostapd_vlan_valid(hapd->conf->vlan, vlan_id)) {
2258 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_RADIUS,
2259 HOSTAPD_LEVEL_INFO,
2260 "Invalid VLAN %d%s received from RADIUS server",
2261 vlan_id->untagged,
2262 vlan_id->tagged[0] ? "+" : "");
2263 return -1;
2264 }
2265 if (ap_sta_set_vlan(hapd, sta, vlan_id) < 0)
2266 return -1;
2267 if (sta->vlan_id)
2268 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_RADIUS,
2269 HOSTAPD_LEVEL_INFO, "VLAN ID %d", sta->vlan_id);
2270
2271 hostapd_free_psk_list(sta->psk);
2272 if (hapd->conf->wpa_psk_radius != PSK_RADIUS_IGNORED)
2273 hostapd_copy_psk_list(&sta->psk, psk);
2274 else
2275 sta->psk = NULL;
2276
2277 os_free(sta->identity);
2278 if (identity)
2279 sta->identity = os_strdup(identity);
2280 else
2281 sta->identity = NULL;
2282
2283 os_free(sta->radius_cui);
2284 if (radius_cui)
2285 sta->radius_cui = os_strdup(radius_cui);
2286 else
2287 sta->radius_cui = NULL;
2288
2289 if (hapd->conf->acct_interim_interval == 0 && acct_interim_interval)
2290 sta->acct_interim_interval = acct_interim_interval;
2291 if (res == HOSTAPD_ACL_ACCEPT_TIMEOUT) {
2292 sta->session_timeout_set = 1;
2293 os_get_reltime(&sta->session_timeout);
2294 sta->session_timeout.sec += session_timeout;
2295 ap_sta_session_timeout(hapd, sta, session_timeout);
2296 } else {
2297 sta->session_timeout_set = 0;
2298 ap_sta_no_session_timeout(hapd, sta);
2299 }
2300
2301 return 0;
2302 }
2303
2304
2305 #ifdef CONFIG_PASN
2306 #ifdef CONFIG_FILS
2307
pasn_fils_auth_resp(struct hostapd_data * hapd,struct sta_info * sta,u16 status,struct wpabuf * erp_resp,const u8 * msk,size_t msk_len)2308 static void pasn_fils_auth_resp(struct hostapd_data *hapd,
2309 struct sta_info *sta, u16 status,
2310 struct wpabuf *erp_resp,
2311 const u8 *msk, size_t msk_len)
2312 {
2313 struct pasn_data *pasn = sta->pasn;
2314 struct pasn_fils *fils = &pasn->fils;
2315 u8 pmk[PMK_LEN_MAX];
2316 size_t pmk_len;
2317 int ret;
2318
2319 wpa_printf(MSG_DEBUG, "PASN: FILS: Handle AS response - status=%u",
2320 status);
2321
2322 if (status != WLAN_STATUS_SUCCESS)
2323 goto fail;
2324
2325 if (!pasn->secret) {
2326 wpa_printf(MSG_DEBUG, "PASN: FILS: Missing secret");
2327 goto fail;
2328 }
2329
2330 if (random_get_bytes(fils->anonce, FILS_NONCE_LEN) < 0) {
2331 wpa_printf(MSG_DEBUG, "PASN: FILS: Failed to get ANonce");
2332 goto fail;
2333 }
2334
2335 wpa_hexdump(MSG_DEBUG, "RSN: Generated FILS ANonce",
2336 fils->anonce, FILS_NONCE_LEN);
2337
2338 ret = fils_rmsk_to_pmk(pasn->akmp, msk, msk_len, fils->nonce,
2339 fils->anonce, NULL, 0, pmk, &pmk_len);
2340 if (ret) {
2341 wpa_printf(MSG_DEBUG, "FILS: Failed to derive PMK");
2342 goto fail;
2343 }
2344
2345 ret = pasn_pmk_to_ptk(pmk, pmk_len, sta->addr, hapd->own_addr,
2346 wpabuf_head(pasn->secret),
2347 wpabuf_len(pasn->secret),
2348 &sta->pasn->ptk, sta->pasn->akmp,
2349 sta->pasn->cipher, sta->pasn->kdk_len);
2350 if (ret) {
2351 wpa_printf(MSG_DEBUG, "PASN: FILS: Failed to derive PTK");
2352 goto fail;
2353 }
2354
2355 if (pasn->secure_ltf) {
2356 ret = wpa_ltf_keyseed(&pasn->ptk, pasn->akmp, pasn->cipher);
2357 if (ret) {
2358 wpa_printf(MSG_DEBUG,
2359 "PASN: FILS: Failed to derive LTF keyseed");
2360 goto fail;
2361 }
2362 }
2363
2364 wpa_printf(MSG_DEBUG, "PASN: PTK successfully derived");
2365
2366 wpabuf_free(pasn->secret);
2367 pasn->secret = NULL;
2368
2369 fils->erp_resp = erp_resp;
2370 ret = handle_auth_pasn_resp(sta->pasn, hapd->own_addr, sta->addr, NULL,
2371 WLAN_STATUS_SUCCESS);
2372 fils->erp_resp = NULL;
2373
2374 if (ret) {
2375 wpa_printf(MSG_DEBUG, "PASN: FILS: Failed to send response");
2376 goto fail;
2377 }
2378
2379 fils->state = PASN_FILS_STATE_COMPLETE;
2380 return;
2381 fail:
2382 ap_free_sta(hapd, sta);
2383 }
2384
2385
pasn_wd_handle_fils(struct hostapd_data * hapd,struct sta_info * sta,struct wpabuf * wd)2386 static int pasn_wd_handle_fils(struct hostapd_data *hapd, struct sta_info *sta,
2387 struct wpabuf *wd)
2388 {
2389 #ifdef CONFIG_NO_RADIUS
2390 wpa_printf(MSG_DEBUG, "PASN: FILS: RADIUS is not configured. Fail");
2391 return -1;
2392 #else /* CONFIG_NO_RADIUS */
2393 struct pasn_data *pasn = sta->pasn;
2394 struct pasn_fils *fils = &pasn->fils;
2395 struct ieee802_11_elems elems;
2396 struct wpa_ie_data rsne_data;
2397 struct wpabuf *fils_wd;
2398 const u8 *data;
2399 size_t buf_len;
2400 u16 alg, seq, status;
2401 int ret;
2402
2403 if (fils->state != PASN_FILS_STATE_NONE) {
2404 wpa_printf(MSG_DEBUG, "PASN: FILS: Not expecting wrapped data");
2405 return -1;
2406 }
2407
2408 if (!wd) {
2409 wpa_printf(MSG_DEBUG, "PASN: FILS: No wrapped data");
2410 return -1;
2411 }
2412
2413 data = wpabuf_head_u8(wd);
2414 buf_len = wpabuf_len(wd);
2415
2416 if (buf_len < 6) {
2417 wpa_printf(MSG_DEBUG, "PASN: FILS: Buffer too short. len=%zu",
2418 buf_len);
2419 return -1;
2420 }
2421
2422 alg = WPA_GET_LE16(data);
2423 seq = WPA_GET_LE16(data + 2);
2424 status = WPA_GET_LE16(data + 4);
2425
2426 wpa_printf(MSG_DEBUG, "PASN: FILS: alg=%u, seq=%u, status=%u",
2427 alg, seq, status);
2428
2429 if (alg != WLAN_AUTH_FILS_SK || seq != 1 ||
2430 status != WLAN_STATUS_SUCCESS) {
2431 wpa_printf(MSG_DEBUG,
2432 "PASN: FILS: Dropping peer authentication");
2433 return -1;
2434 }
2435
2436 data += 6;
2437 buf_len -= 6;
2438
2439 if (ieee802_11_parse_elems(data, buf_len, &elems, 1) == ParseFailed) {
2440 wpa_printf(MSG_DEBUG, "PASN: FILS: Could not parse elements");
2441 return -1;
2442 }
2443
2444 if (!elems.rsn_ie || !elems.fils_nonce || !elems.fils_nonce ||
2445 !elems.wrapped_data || !elems.fils_session) {
2446 wpa_printf(MSG_DEBUG, "PASN: FILS: Missing IEs");
2447 return -1;
2448 }
2449
2450 ret = wpa_parse_wpa_ie_rsn(elems.rsn_ie - 2, elems.rsn_ie_len + 2,
2451 &rsne_data);
2452 if (ret) {
2453 wpa_printf(MSG_DEBUG, "PASN: FILS: Failed parsing RSNE");
2454 return -1;
2455 }
2456
2457 ret = wpa_pasn_validate_rsne(&rsne_data);
2458 if (ret) {
2459 wpa_printf(MSG_DEBUG, "PASN: FILS: Failed validating RSNE");
2460 return -1;
2461 }
2462
2463 if (rsne_data.num_pmkid) {
2464 wpa_printf(MSG_DEBUG,
2465 "PASN: FILS: Not expecting PMKID in RSNE");
2466 return -1;
2467 }
2468
2469 wpa_hexdump(MSG_DEBUG, "PASN: FILS: Nonce", elems.fils_nonce,
2470 FILS_NONCE_LEN);
2471 os_memcpy(fils->nonce, elems.fils_nonce, FILS_NONCE_LEN);
2472
2473 wpa_hexdump(MSG_DEBUG, "PASN: FILS: Session", elems.fils_session,
2474 FILS_SESSION_LEN);
2475 os_memcpy(fils->session, elems.fils_session, FILS_SESSION_LEN);
2476
2477 fils_wd = ieee802_11_defrag(&elems, WLAN_EID_EXTENSION,
2478 WLAN_EID_EXT_WRAPPED_DATA);
2479
2480 if (!fils_wd) {
2481 wpa_printf(MSG_DEBUG, "PASN: FILS: Missing wrapped data");
2482 return -1;
2483 }
2484
2485 if (!sta->eapol_sm)
2486 sta->eapol_sm = ieee802_1x_alloc_eapol_sm(hapd, sta);
2487
2488 wpa_printf(MSG_DEBUG,
2489 "PASN: FILS: Forward EAP-Initiate/Re-auth to AS");
2490
2491 ieee802_1x_encapsulate_radius(hapd, sta, wpabuf_head(fils_wd),
2492 wpabuf_len(fils_wd));
2493
2494 sta->flags |= WLAN_STA_PENDING_PASN_FILS_ERP;
2495
2496 fils->state = PASN_FILS_STATE_PENDING_AS;
2497
2498 /*
2499 * Calculate pending PMKID here so that we do not need to maintain a
2500 * copy of the EAP-Initiate/Reautt message.
2501 */
2502 fils_pmkid_erp(pasn->akmp, wpabuf_head(fils_wd), wpabuf_len(fils_wd),
2503 fils->erp_pmkid);
2504
2505 wpabuf_free(fils_wd);
2506 return 0;
2507 #endif /* CONFIG_NO_RADIUS */
2508 }
2509
2510 #endif /* CONFIG_FILS */
2511
2512
hapd_pasn_send_mlme(void * ctx,const u8 * data,size_t data_len,int noack,unsigned int freq,unsigned int wait)2513 static int hapd_pasn_send_mlme(void *ctx, const u8 *data, size_t data_len,
2514 int noack, unsigned int freq, unsigned int wait)
2515 {
2516 struct hostapd_data *hapd = ctx;
2517
2518 return hostapd_drv_send_mlme(hapd, data, data_len, 0, NULL, 0, 0);
2519 }
2520
2521
hapd_initialize_pasn(struct hostapd_data * hapd,struct sta_info * sta)2522 static void hapd_initialize_pasn(struct hostapd_data *hapd,
2523 struct sta_info *sta)
2524 {
2525 struct pasn_data *pasn = sta->pasn;
2526
2527 pasn->cb_ctx = hapd;
2528 pasn->send_mgmt = hapd_pasn_send_mlme;
2529 pasn->pasn_groups = hapd->conf->pasn_groups;
2530 pasn->noauth = hapd->conf->pasn_noauth;
2531 pasn->wpa_key_mgmt = hapd->conf->wpa_key_mgmt;
2532 pasn->rsn_pairwise = hapd->conf->rsn_pairwise;
2533 pasn->derive_kdk = hapd->iface->drv_flags2 &
2534 WPA_DRIVER_FLAGS2_SEC_LTF_AP;
2535 #ifdef CONFIG_TESTING_OPTIONS
2536 pasn->corrupt_mic = hapd->conf->pasn_corrupt_mic;
2537 if (hapd->conf->force_kdk_derivation)
2538 pasn->derive_kdk = true;
2539 #endif /* CONFIG_TESTING_OPTIONS */
2540 pasn->use_anti_clogging = use_anti_clogging(hapd);
2541 pasn->password = sae_get_password(hapd, sta, NULL, NULL, &pasn->pt,
2542 NULL);
2543 pasn->rsn_ie = wpa_auth_get_wpa_ie(hapd->wpa_auth, &pasn->rsn_ie_len);
2544 pasn->rsnxe_ie = hostapd_wpa_ie(hapd, WLAN_EID_RSNX);
2545 pasn->disable_pmksa_caching = hapd->conf->disable_pmksa_caching;
2546 pasn->pmksa = wpa_auth_get_pmksa_cache(hapd->wpa_auth);
2547
2548 pasn->comeback_after = hapd->conf->pasn_comeback_after;
2549 pasn->comeback_idx = hapd->comeback_idx;
2550 pasn->comeback_key = hapd->comeback_key;
2551 pasn->comeback_pending_idx = hapd->comeback_pending_idx;
2552 os_memcpy(pasn->bssid, hapd->own_addr, ETH_ALEN);
2553 }
2554
2555
pasn_set_keys_from_cache(struct hostapd_data * hapd,const u8 * own_addr,const u8 * sta_addr,int cipher,int akmp)2556 static int pasn_set_keys_from_cache(struct hostapd_data *hapd,
2557 const u8 *own_addr, const u8 *sta_addr,
2558 int cipher, int akmp)
2559 {
2560 struct ptksa_cache_entry *entry;
2561
2562 entry = ptksa_cache_get(hapd->ptksa, sta_addr, cipher);
2563 if (!entry) {
2564 wpa_printf(MSG_DEBUG, "PASN: peer " MACSTR
2565 " not present in PTKSA cache", MAC2STR(sta_addr));
2566 return -1;
2567 }
2568
2569 if (os_memcmp(entry->own_addr, own_addr, ETH_ALEN) != 0) {
2570 wpa_printf(MSG_DEBUG,
2571 "PASN: own addr " MACSTR " and PTKSA entry own addr "
2572 MACSTR " differ",
2573 MAC2STR(own_addr), MAC2STR(entry->own_addr));
2574 return -1;
2575 }
2576
2577 wpa_printf(MSG_DEBUG, "PASN: " MACSTR " present in PTKSA cache",
2578 MAC2STR(sta_addr));
2579 hostapd_drv_set_secure_ranging_ctx(hapd, own_addr, sta_addr, cipher,
2580 entry->ptk.tk_len, entry->ptk.tk,
2581 entry->ptk.ltf_keyseed_len,
2582 entry->ptk.ltf_keyseed, 0);
2583
2584 return 0;
2585 }
2586
2587
hapd_pasn_update_params(struct hostapd_data * hapd,struct sta_info * sta,const struct ieee80211_mgmt * mgmt,size_t len)2588 static void hapd_pasn_update_params(struct hostapd_data *hapd,
2589 struct sta_info *sta,
2590 const struct ieee80211_mgmt *mgmt,
2591 size_t len)
2592 {
2593 struct pasn_data *pasn = sta->pasn;
2594 struct ieee802_11_elems elems;
2595 struct wpa_ie_data rsn_data;
2596 struct wpa_pasn_params_data pasn_params;
2597 struct wpabuf *wrapped_data = NULL;
2598
2599 if (ieee802_11_parse_elems(mgmt->u.auth.variable,
2600 len - offsetof(struct ieee80211_mgmt,
2601 u.auth.variable),
2602 &elems, 0) == ParseFailed) {
2603 wpa_printf(MSG_DEBUG,
2604 "PASN: Failed parsing Authentication frame");
2605 return;
2606 }
2607
2608 if (!elems.rsn_ie ||
2609 wpa_parse_wpa_ie_rsn(elems.rsn_ie - 2, elems.rsn_ie_len + 2,
2610 &rsn_data)) {
2611 wpa_printf(MSG_DEBUG, "PASN: Failed parsing RSNE");
2612 return;
2613 }
2614
2615 if (!(rsn_data.key_mgmt & pasn->wpa_key_mgmt) ||
2616 !(rsn_data.pairwise_cipher & pasn->rsn_pairwise)) {
2617 wpa_printf(MSG_DEBUG, "PASN: Mismatch in AKMP/cipher");
2618 return;
2619 }
2620
2621 pasn->akmp = rsn_data.key_mgmt;
2622 pasn->cipher = rsn_data.pairwise_cipher;
2623
2624 if (wpa_key_mgmt_ft(pasn->akmp) && rsn_data.num_pmkid) {
2625 #ifdef CONFIG_IEEE80211R_AP
2626 pasn->pmk_r1_len = 0;
2627 wpa_ft_fetch_pmk_r1(hapd->wpa_auth, sta->addr,
2628 rsn_data.pmkid,
2629 pasn->pmk_r1, &pasn->pmk_r1_len, NULL,
2630 NULL, NULL, NULL,
2631 NULL, NULL, NULL);
2632 #endif /* CONFIG_IEEE80211R_AP */
2633 }
2634 #ifdef CONFIG_FILS
2635 if (pasn->akmp != WPA_KEY_MGMT_FILS_SHA256 &&
2636 pasn->akmp != WPA_KEY_MGMT_FILS_SHA384)
2637 return;
2638 if (!elems.pasn_params ||
2639 wpa_pasn_parse_parameter_ie(elems.pasn_params - 3,
2640 elems.pasn_params_len + 3,
2641 false, &pasn_params)) {
2642 wpa_printf(MSG_DEBUG,
2643 "PASN: Failed validation of PASN Parameters element");
2644 return;
2645 }
2646 if (pasn_params.wrapped_data_format != WPA_PASN_WRAPPED_DATA_NO) {
2647 wrapped_data = ieee802_11_defrag(&elems, WLAN_EID_EXTENSION,
2648 WLAN_EID_EXT_WRAPPED_DATA);
2649 if (!wrapped_data) {
2650 wpa_printf(MSG_DEBUG, "PASN: Missing wrapped data");
2651 return;
2652 }
2653 if (pasn_wd_handle_fils(hapd, sta, wrapped_data))
2654 wpa_printf(MSG_DEBUG,
2655 "PASN: Failed processing FILS wrapped data");
2656 else
2657 pasn->fils_wd_valid = true;
2658 }
2659 wpabuf_free(wrapped_data);
2660 #endif /* CONFIG_FILS */
2661 }
2662
2663
handle_auth_pasn(struct hostapd_data * hapd,struct sta_info * sta,const struct ieee80211_mgmt * mgmt,size_t len,u16 trans_seq,u16 status)2664 static void handle_auth_pasn(struct hostapd_data *hapd, struct sta_info *sta,
2665 const struct ieee80211_mgmt *mgmt, size_t len,
2666 u16 trans_seq, u16 status)
2667 {
2668 if (hapd->conf->wpa != WPA_PROTO_RSN) {
2669 wpa_printf(MSG_INFO, "PASN: RSN is not configured");
2670 return;
2671 }
2672
2673 wpa_printf(MSG_INFO, "PASN authentication: sta=" MACSTR,
2674 MAC2STR(sta->addr));
2675
2676 if (trans_seq == 1) {
2677 if (sta->pasn) {
2678 wpa_printf(MSG_DEBUG,
2679 "PASN: Not expecting transaction == 1");
2680 return;
2681 }
2682
2683 if (status != WLAN_STATUS_SUCCESS) {
2684 wpa_printf(MSG_DEBUG,
2685 "PASN: Failure status in transaction == 1");
2686 return;
2687 }
2688
2689 sta->pasn = os_zalloc(sizeof(*sta->pasn));
2690 if (!sta->pasn) {
2691 wpa_printf(MSG_DEBUG,
2692 "PASN: Failed to allocate PASN context");
2693 return;
2694 }
2695
2696 hapd_initialize_pasn(hapd, sta);
2697
2698 hapd_pasn_update_params(hapd, sta, mgmt, len);
2699 if (handle_auth_pasn_1(sta->pasn, hapd->own_addr,
2700 sta->addr, mgmt, len) < 0)
2701 ap_free_sta(hapd, sta);
2702 } else if (trans_seq == 3) {
2703 if (!sta->pasn) {
2704 wpa_printf(MSG_DEBUG,
2705 "PASN: Not expecting transaction == 3");
2706 return;
2707 }
2708
2709 if (status != WLAN_STATUS_SUCCESS) {
2710 wpa_printf(MSG_DEBUG,
2711 "PASN: Failure status in transaction == 3");
2712 ap_free_sta_pasn(hapd, sta);
2713 return;
2714 }
2715
2716 if (handle_auth_pasn_3(sta->pasn, hapd->own_addr,
2717 sta->addr, mgmt, len) == 0) {
2718 ptksa_cache_add(hapd->ptksa, hapd->own_addr, sta->addr,
2719 sta->pasn->cipher, 43200,
2720 &sta->pasn->ptk, NULL, NULL,
2721 sta->pasn->akmp);
2722
2723 pasn_set_keys_from_cache(hapd, hapd->own_addr,
2724 sta->addr, sta->pasn->cipher,
2725 sta->pasn->akmp);
2726 }
2727 ap_free_sta(hapd, sta);
2728 } else {
2729 wpa_printf(MSG_DEBUG,
2730 "PASN: Invalid transaction %u - ignore", trans_seq);
2731 }
2732 }
2733
2734 #endif /* CONFIG_PASN */
2735
2736
handle_auth(struct hostapd_data * hapd,const struct ieee80211_mgmt * mgmt,size_t len,int rssi,int from_queue)2737 static void handle_auth(struct hostapd_data *hapd,
2738 const struct ieee80211_mgmt *mgmt, size_t len,
2739 int rssi, int from_queue)
2740 {
2741 u16 auth_alg, auth_transaction, status_code;
2742 u16 resp = WLAN_STATUS_SUCCESS;
2743 struct sta_info *sta = NULL;
2744 int res, reply_res;
2745 u16 fc;
2746 const u8 *challenge = NULL;
2747 u8 resp_ies[2 + WLAN_AUTH_CHALLENGE_LEN];
2748 size_t resp_ies_len = 0;
2749 u16 seq_ctrl;
2750 struct radius_sta rad_info;
2751
2752 if (len < IEEE80211_HDRLEN + sizeof(mgmt->u.auth)) {
2753 wpa_printf(MSG_INFO, "handle_auth - too short payload (len=%lu)",
2754 (unsigned long) len);
2755 return;
2756 }
2757
2758 #ifdef CONFIG_TESTING_OPTIONS
2759 if (hapd->iconf->ignore_auth_probability > 0.0 &&
2760 drand48() < hapd->iconf->ignore_auth_probability) {
2761 wpa_printf(MSG_INFO,
2762 "TESTING: ignoring auth frame from " MACSTR,
2763 MAC2STR(mgmt->sa));
2764 return;
2765 }
2766 #endif /* CONFIG_TESTING_OPTIONS */
2767
2768 auth_alg = le_to_host16(mgmt->u.auth.auth_alg);
2769 auth_transaction = le_to_host16(mgmt->u.auth.auth_transaction);
2770 status_code = le_to_host16(mgmt->u.auth.status_code);
2771 fc = le_to_host16(mgmt->frame_control);
2772 seq_ctrl = le_to_host16(mgmt->seq_ctrl);
2773
2774 if (len >= IEEE80211_HDRLEN + sizeof(mgmt->u.auth) +
2775 2 + WLAN_AUTH_CHALLENGE_LEN &&
2776 mgmt->u.auth.variable[0] == WLAN_EID_CHALLENGE &&
2777 mgmt->u.auth.variable[1] == WLAN_AUTH_CHALLENGE_LEN)
2778 challenge = &mgmt->u.auth.variable[2];
2779
2780 wpa_printf(MSG_DEBUG, "authentication: STA=" MACSTR " auth_alg=%d "
2781 "auth_transaction=%d status_code=%d wep=%d%s "
2782 "seq_ctrl=0x%x%s%s",
2783 MAC2STR(mgmt->sa), auth_alg, auth_transaction,
2784 status_code, !!(fc & WLAN_FC_ISWEP),
2785 challenge ? " challenge" : "",
2786 seq_ctrl, (fc & WLAN_FC_RETRY) ? " retry" : "",
2787 from_queue ? " (from queue)" : "");
2788
2789 #ifdef CONFIG_NO_RC4
2790 if (auth_alg == WLAN_AUTH_SHARED_KEY) {
2791 wpa_printf(MSG_INFO,
2792 "Unsupported authentication algorithm (%d)",
2793 auth_alg);
2794 resp = WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG;
2795 goto fail;
2796 }
2797 #endif /* CONFIG_NO_RC4 */
2798
2799 if (hapd->tkip_countermeasures) {
2800 wpa_printf(MSG_DEBUG,
2801 "Ongoing TKIP countermeasures (Michael MIC failure) - reject authentication");
2802 resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
2803 goto fail;
2804 }
2805
2806 if (!(((hapd->conf->auth_algs & WPA_AUTH_ALG_OPEN) &&
2807 auth_alg == WLAN_AUTH_OPEN) ||
2808 #ifdef CONFIG_IEEE80211R_AP
2809 (hapd->conf->wpa && wpa_key_mgmt_ft(hapd->conf->wpa_key_mgmt) &&
2810 auth_alg == WLAN_AUTH_FT) ||
2811 #endif /* CONFIG_IEEE80211R_AP */
2812 #ifdef CONFIG_SAE
2813 (hapd->conf->wpa && wpa_key_mgmt_sae(hapd->conf->wpa_key_mgmt) &&
2814 auth_alg == WLAN_AUTH_SAE) ||
2815 #endif /* CONFIG_SAE */
2816 #ifdef CONFIG_FILS
2817 (hapd->conf->wpa && wpa_key_mgmt_fils(hapd->conf->wpa_key_mgmt) &&
2818 auth_alg == WLAN_AUTH_FILS_SK) ||
2819 (hapd->conf->wpa && wpa_key_mgmt_fils(hapd->conf->wpa_key_mgmt) &&
2820 hapd->conf->fils_dh_group &&
2821 auth_alg == WLAN_AUTH_FILS_SK_PFS) ||
2822 #endif /* CONFIG_FILS */
2823 #ifdef CONFIG_PASN
2824 (hapd->conf->wpa &&
2825 (hapd->conf->wpa_key_mgmt & WPA_KEY_MGMT_PASN) &&
2826 auth_alg == WLAN_AUTH_PASN) ||
2827 #endif /* CONFIG_PASN */
2828 ((hapd->conf->auth_algs & WPA_AUTH_ALG_SHARED) &&
2829 auth_alg == WLAN_AUTH_SHARED_KEY))) {
2830 wpa_printf(MSG_INFO, "Unsupported authentication algorithm (%d)",
2831 auth_alg);
2832 resp = WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG;
2833 goto fail;
2834 }
2835
2836 if (!(auth_transaction == 1 || auth_alg == WLAN_AUTH_SAE ||
2837 #ifdef CONFIG_PASN
2838 (auth_alg == WLAN_AUTH_PASN && auth_transaction == 3) ||
2839 #endif /* CONFIG_PASN */
2840 (auth_alg == WLAN_AUTH_SHARED_KEY && auth_transaction == 3))) {
2841 wpa_printf(MSG_INFO, "Unknown authentication transaction number (%d)",
2842 auth_transaction);
2843 resp = WLAN_STATUS_UNKNOWN_AUTH_TRANSACTION;
2844 goto fail;
2845 }
2846
2847 if (os_memcmp(mgmt->sa, hapd->own_addr, ETH_ALEN) == 0) {
2848 wpa_printf(MSG_INFO, "Station " MACSTR " not allowed to authenticate",
2849 MAC2STR(mgmt->sa));
2850 resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
2851 goto fail;
2852 }
2853
2854 if (hapd->conf->no_auth_if_seen_on) {
2855 struct hostapd_data *other;
2856
2857 other = sta_track_seen_on(hapd->iface, mgmt->sa,
2858 hapd->conf->no_auth_if_seen_on);
2859 if (other) {
2860 u8 *pos;
2861 u32 info;
2862 u8 op_class, channel, phytype;
2863
2864 wpa_printf(MSG_DEBUG, "%s: Reject authentication from "
2865 MACSTR " since STA has been seen on %s",
2866 hapd->conf->iface, MAC2STR(mgmt->sa),
2867 hapd->conf->no_auth_if_seen_on);
2868
2869 resp = WLAN_STATUS_REJECTED_WITH_SUGGESTED_BSS_TRANSITION;
2870 pos = &resp_ies[0];
2871 *pos++ = WLAN_EID_NEIGHBOR_REPORT;
2872 *pos++ = 13;
2873 os_memcpy(pos, other->own_addr, ETH_ALEN);
2874 pos += ETH_ALEN;
2875 info = 0; /* TODO: BSSID Information */
2876 WPA_PUT_LE32(pos, info);
2877 pos += 4;
2878 if (other->iconf->hw_mode == HOSTAPD_MODE_IEEE80211AD)
2879 phytype = 8; /* dmg */
2880 else if (other->iconf->ieee80211ac)
2881 phytype = 9; /* vht */
2882 else if (other->iconf->ieee80211n)
2883 phytype = 7; /* ht */
2884 else if (other->iconf->hw_mode ==
2885 HOSTAPD_MODE_IEEE80211A)
2886 phytype = 4; /* ofdm */
2887 else if (other->iconf->hw_mode ==
2888 HOSTAPD_MODE_IEEE80211G)
2889 phytype = 6; /* erp */
2890 else
2891 phytype = 5; /* hrdsss */
2892 if (ieee80211_freq_to_channel_ext(
2893 hostapd_hw_get_freq(other,
2894 other->iconf->channel),
2895 other->iconf->secondary_channel,
2896 other->iconf->ieee80211ac,
2897 &op_class, &channel) == NUM_HOSTAPD_MODES) {
2898 op_class = 0;
2899 channel = other->iconf->channel;
2900 }
2901 *pos++ = op_class;
2902 *pos++ = channel;
2903 *pos++ = phytype;
2904 resp_ies_len = pos - &resp_ies[0];
2905 goto fail;
2906 }
2907 }
2908
2909 res = ieee802_11_allowed_address(hapd, mgmt->sa, (const u8 *) mgmt, len,
2910 &rad_info);
2911 if (res == HOSTAPD_ACL_REJECT) {
2912 wpa_msg(hapd->msg_ctx, MSG_DEBUG,
2913 "Ignore Authentication frame from " MACSTR
2914 " due to ACL reject", MAC2STR(mgmt->sa));
2915 resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
2916 goto fail;
2917 }
2918 if (res == HOSTAPD_ACL_PENDING)
2919 return;
2920
2921 #ifdef CONFIG_SAE
2922 if (auth_alg == WLAN_AUTH_SAE && !from_queue &&
2923 (auth_transaction == 1 ||
2924 (auth_transaction == 2 && auth_sae_queued_addr(hapd, mgmt->sa)))) {
2925 /* Handle SAE Authentication commit message through a queue to
2926 * provide more control for postponing the needed heavy
2927 * processing under a possible DoS attack scenario. In addition,
2928 * queue SAE Authentication confirm message if there happens to
2929 * be a queued commit message from the same peer. This is needed
2930 * to avoid reordering Authentication frames within the same
2931 * SAE exchange. */
2932 auth_sae_queue(hapd, mgmt, len, rssi);
2933 return;
2934 }
2935 #endif /* CONFIG_SAE */
2936
2937 sta = ap_get_sta(hapd, mgmt->sa);
2938 if (sta) {
2939 sta->flags &= ~WLAN_STA_PENDING_FILS_ERP;
2940 sta->ft_over_ds = 0;
2941 if ((fc & WLAN_FC_RETRY) &&
2942 sta->last_seq_ctrl != WLAN_INVALID_MGMT_SEQ &&
2943 sta->last_seq_ctrl == seq_ctrl &&
2944 sta->last_subtype == WLAN_FC_STYPE_AUTH) {
2945 hostapd_logger(hapd, sta->addr,
2946 HOSTAPD_MODULE_IEEE80211,
2947 HOSTAPD_LEVEL_DEBUG,
2948 "Drop repeated authentication frame seq_ctrl=0x%x",
2949 seq_ctrl);
2950 return;
2951 }
2952 #ifdef CONFIG_MESH
2953 if ((hapd->conf->mesh & MESH_ENABLED) &&
2954 sta->plink_state == PLINK_BLOCKED) {
2955 wpa_printf(MSG_DEBUG, "Mesh peer " MACSTR
2956 " is blocked - drop Authentication frame",
2957 MAC2STR(mgmt->sa));
2958 return;
2959 }
2960 #endif /* CONFIG_MESH */
2961 #ifdef CONFIG_PASN
2962 if (auth_alg == WLAN_AUTH_PASN &&
2963 (sta->flags & WLAN_STA_ASSOC)) {
2964 wpa_printf(MSG_DEBUG,
2965 "PASN: auth: Existing station: " MACSTR,
2966 MAC2STR(sta->addr));
2967 return;
2968 }
2969 #endif /* CONFIG_PASN */
2970 } else {
2971 #ifdef CONFIG_MESH
2972 if (hapd->conf->mesh & MESH_ENABLED) {
2973 /* if the mesh peer is not available, we don't do auth.
2974 */
2975 wpa_printf(MSG_DEBUG, "Mesh peer " MACSTR
2976 " not yet known - drop Authentication frame",
2977 MAC2STR(mgmt->sa));
2978 /*
2979 * Save a copy of the frame so that it can be processed
2980 * if a new peer entry is added shortly after this.
2981 */
2982 wpabuf_free(hapd->mesh_pending_auth);
2983 hapd->mesh_pending_auth = wpabuf_alloc_copy(mgmt, len);
2984 os_get_reltime(&hapd->mesh_pending_auth_time);
2985 return;
2986 }
2987 #endif /* CONFIG_MESH */
2988
2989 sta = ap_sta_add(hapd, mgmt->sa);
2990 if (!sta) {
2991 wpa_printf(MSG_DEBUG, "ap_sta_add() failed");
2992 resp = WLAN_STATUS_AP_UNABLE_TO_HANDLE_NEW_STA;
2993 goto fail;
2994 }
2995 }
2996 sta->last_seq_ctrl = seq_ctrl;
2997 sta->last_subtype = WLAN_FC_STYPE_AUTH;
2998 #ifdef CONFIG_MBO
2999 sta->auth_rssi = rssi;
3000 #endif /* CONFIG_MBO */
3001
3002 res = ieee802_11_set_radius_info(hapd, sta, res, &rad_info);
3003 if (res) {
3004 wpa_printf(MSG_DEBUG, "ieee802_11_set_radius_info() failed");
3005 resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
3006 goto fail;
3007 }
3008
3009 sta->flags &= ~WLAN_STA_PREAUTH;
3010 ieee802_1x_notify_pre_auth(sta->eapol_sm, 0);
3011
3012 /*
3013 * If the driver supports full AP client state, add a station to the
3014 * driver before sending authentication reply to make sure the driver
3015 * has resources, and not to go through the entire authentication and
3016 * association handshake, and fail it at the end.
3017 *
3018 * If this is not the first transaction, in a multi-step authentication
3019 * algorithm, the station already exists in the driver
3020 * (sta->added_unassoc = 1) so skip it.
3021 *
3022 * In mesh mode, the station was already added to the driver when the
3023 * NEW_PEER_CANDIDATE event is received.
3024 *
3025 * If PMF was negotiated for the existing association, skip this to
3026 * avoid dropping the STA entry and the associated keys. This is needed
3027 * to allow the original connection work until the attempt can complete
3028 * (re)association, so that unprotected Authentication frame cannot be
3029 * used to bypass PMF protection.
3030 *
3031 * PASN authentication does not require adding/removing station to the
3032 * driver so skip this flow in case of PASN authentication.
3033 */
3034 if (FULL_AP_CLIENT_STATE_SUPP(hapd->iface->drv_flags) &&
3035 (!(sta->flags & WLAN_STA_MFP) || !ap_sta_is_authorized(sta)) &&
3036 !(hapd->conf->mesh & MESH_ENABLED) &&
3037 !(sta->added_unassoc) && auth_alg != WLAN_AUTH_PASN) {
3038 if (ap_sta_re_add(hapd, sta) < 0) {
3039 resp = WLAN_STATUS_AP_UNABLE_TO_HANDLE_NEW_STA;
3040 goto fail;
3041 }
3042 }
3043
3044 switch (auth_alg) {
3045 case WLAN_AUTH_OPEN:
3046 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
3047 HOSTAPD_LEVEL_DEBUG,
3048 "authentication OK (open system)");
3049 sta->flags |= WLAN_STA_AUTH;
3050 wpa_auth_sm_event(sta->wpa_sm, WPA_AUTH);
3051 sta->auth_alg = WLAN_AUTH_OPEN;
3052 mlme_authenticate_indication(hapd, sta);
3053 break;
3054 #ifdef CONFIG_WEP
3055 #ifndef CONFIG_NO_RC4
3056 case WLAN_AUTH_SHARED_KEY:
3057 resp = auth_shared_key(hapd, sta, auth_transaction, challenge,
3058 fc & WLAN_FC_ISWEP);
3059 if (resp != 0)
3060 wpa_printf(MSG_DEBUG,
3061 "auth_shared_key() failed: status=%d", resp);
3062 sta->auth_alg = WLAN_AUTH_SHARED_KEY;
3063 mlme_authenticate_indication(hapd, sta);
3064 if (sta->challenge && auth_transaction == 1) {
3065 resp_ies[0] = WLAN_EID_CHALLENGE;
3066 resp_ies[1] = WLAN_AUTH_CHALLENGE_LEN;
3067 os_memcpy(resp_ies + 2, sta->challenge,
3068 WLAN_AUTH_CHALLENGE_LEN);
3069 resp_ies_len = 2 + WLAN_AUTH_CHALLENGE_LEN;
3070 }
3071 break;
3072 #endif /* CONFIG_NO_RC4 */
3073 #endif /* CONFIG_WEP */
3074 #ifdef CONFIG_IEEE80211R_AP
3075 case WLAN_AUTH_FT:
3076 sta->auth_alg = WLAN_AUTH_FT;
3077 if (sta->wpa_sm == NULL)
3078 sta->wpa_sm = wpa_auth_sta_init(hapd->wpa_auth,
3079 sta->addr, NULL);
3080 if (sta->wpa_sm == NULL) {
3081 wpa_printf(MSG_DEBUG, "FT: Failed to initialize WPA "
3082 "state machine");
3083 resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
3084 goto fail;
3085 }
3086 wpa_ft_process_auth(sta->wpa_sm, mgmt->bssid,
3087 auth_transaction, mgmt->u.auth.variable,
3088 len - IEEE80211_HDRLEN -
3089 sizeof(mgmt->u.auth),
3090 handle_auth_ft_finish, hapd);
3091 /* handle_auth_ft_finish() callback will complete auth. */
3092 return;
3093 #endif /* CONFIG_IEEE80211R_AP */
3094 #ifdef CONFIG_SAE
3095 case WLAN_AUTH_SAE:
3096 #ifdef CONFIG_MESH
3097 if (status_code == WLAN_STATUS_SUCCESS &&
3098 hapd->conf->mesh & MESH_ENABLED) {
3099 if (sta->wpa_sm == NULL)
3100 sta->wpa_sm =
3101 wpa_auth_sta_init(hapd->wpa_auth,
3102 sta->addr, NULL);
3103 if (sta->wpa_sm == NULL) {
3104 wpa_printf(MSG_DEBUG,
3105 "SAE: Failed to initialize WPA state machine");
3106 resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
3107 goto fail;
3108 }
3109 }
3110 #endif /* CONFIG_MESH */
3111 handle_auth_sae(hapd, sta, mgmt, len, auth_transaction,
3112 status_code);
3113 return;
3114 #endif /* CONFIG_SAE */
3115 #ifdef CONFIG_FILS
3116 case WLAN_AUTH_FILS_SK:
3117 case WLAN_AUTH_FILS_SK_PFS:
3118 handle_auth_fils(hapd, sta, mgmt->u.auth.variable,
3119 len - IEEE80211_HDRLEN - sizeof(mgmt->u.auth),
3120 auth_alg, auth_transaction, status_code,
3121 handle_auth_fils_finish);
3122 return;
3123 #endif /* CONFIG_FILS */
3124 #ifdef CONFIG_PASN
3125 case WLAN_AUTH_PASN:
3126 handle_auth_pasn(hapd, sta, mgmt, len, auth_transaction,
3127 status_code);
3128 return;
3129 #endif /* CONFIG_PASN */
3130 }
3131
3132 fail:
3133 reply_res = send_auth_reply(hapd, sta, mgmt->sa, mgmt->bssid, auth_alg,
3134 auth_alg == WLAN_AUTH_SAE ?
3135 auth_transaction : auth_transaction + 1,
3136 resp, resp_ies, resp_ies_len,
3137 "handle-auth");
3138
3139 if (sta && sta->added_unassoc && (resp != WLAN_STATUS_SUCCESS ||
3140 reply_res != WLAN_STATUS_SUCCESS)) {
3141 hostapd_drv_sta_remove(hapd, sta->addr);
3142 sta->added_unassoc = 0;
3143 }
3144 }
3145
3146
hostapd_max_bssid_indicator(struct hostapd_data * hapd)3147 static u8 hostapd_max_bssid_indicator(struct hostapd_data *hapd)
3148 {
3149 size_t num_bss_nontx;
3150 u8 max_bssid_ind = 0;
3151
3152 if (!hapd->iconf->mbssid || hapd->iface->num_bss <= 1)
3153 return 0;
3154
3155 num_bss_nontx = hapd->iface->num_bss - 1;
3156 while (num_bss_nontx > 0) {
3157 max_bssid_ind++;
3158 num_bss_nontx >>= 1;
3159 }
3160 return max_bssid_ind;
3161 }
3162
3163
hostapd_get_aid(struct hostapd_data * hapd,struct sta_info * sta)3164 int hostapd_get_aid(struct hostapd_data *hapd, struct sta_info *sta)
3165 {
3166 int i, j = 32, aid;
3167
3168 /* get a unique AID */
3169 if (sta->aid > 0) {
3170 wpa_printf(MSG_DEBUG, " old AID %d", sta->aid);
3171 return 0;
3172 }
3173
3174 if (TEST_FAIL())
3175 return -1;
3176
3177 for (i = 0; i < AID_WORDS; i++) {
3178 if (hapd->sta_aid[i] == (u32) -1)
3179 continue;
3180 for (j = 0; j < 32; j++) {
3181 if (!(hapd->sta_aid[i] & BIT(j)))
3182 break;
3183 }
3184 if (j < 32)
3185 break;
3186 }
3187 if (j == 32)
3188 return -1;
3189 aid = i * 32 + j + (1 << hostapd_max_bssid_indicator(hapd));
3190 if (aid > 2007)
3191 return -1;
3192
3193 sta->aid = aid;
3194 hapd->sta_aid[i] |= BIT(j);
3195 wpa_printf(MSG_DEBUG, " new AID %d", sta->aid);
3196 return 0;
3197 }
3198
3199
check_ssid(struct hostapd_data * hapd,struct sta_info * sta,const u8 * ssid_ie,size_t ssid_ie_len)3200 static u16 check_ssid(struct hostapd_data *hapd, struct sta_info *sta,
3201 const u8 *ssid_ie, size_t ssid_ie_len)
3202 {
3203 if (ssid_ie == NULL)
3204 return WLAN_STATUS_UNSPECIFIED_FAILURE;
3205
3206 if (ssid_ie_len != hapd->conf->ssid.ssid_len ||
3207 os_memcmp(ssid_ie, hapd->conf->ssid.ssid, ssid_ie_len) != 0) {
3208 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
3209 HOSTAPD_LEVEL_INFO,
3210 "Station tried to associate with unknown SSID "
3211 "'%s'", wpa_ssid_txt(ssid_ie, ssid_ie_len));
3212 return WLAN_STATUS_UNSPECIFIED_FAILURE;
3213 }
3214
3215 return WLAN_STATUS_SUCCESS;
3216 }
3217
3218
check_wmm(struct hostapd_data * hapd,struct sta_info * sta,const u8 * wmm_ie,size_t wmm_ie_len)3219 static u16 check_wmm(struct hostapd_data *hapd, struct sta_info *sta,
3220 const u8 *wmm_ie, size_t wmm_ie_len)
3221 {
3222 sta->flags &= ~WLAN_STA_WMM;
3223 sta->qosinfo = 0;
3224 if (wmm_ie && hapd->conf->wmm_enabled) {
3225 struct wmm_information_element *wmm;
3226
3227 if (!hostapd_eid_wmm_valid(hapd, wmm_ie, wmm_ie_len)) {
3228 hostapd_logger(hapd, sta->addr,
3229 HOSTAPD_MODULE_WPA,
3230 HOSTAPD_LEVEL_DEBUG,
3231 "invalid WMM element in association "
3232 "request");
3233 return WLAN_STATUS_UNSPECIFIED_FAILURE;
3234 }
3235
3236 sta->flags |= WLAN_STA_WMM;
3237 wmm = (struct wmm_information_element *) wmm_ie;
3238 sta->qosinfo = wmm->qos_info;
3239 }
3240 return WLAN_STATUS_SUCCESS;
3241 }
3242
check_multi_ap(struct hostapd_data * hapd,struct sta_info * sta,const u8 * multi_ap_ie,size_t multi_ap_len)3243 static u16 check_multi_ap(struct hostapd_data *hapd, struct sta_info *sta,
3244 const u8 *multi_ap_ie, size_t multi_ap_len)
3245 {
3246 u8 multi_ap_value = 0;
3247
3248 sta->flags &= ~WLAN_STA_MULTI_AP;
3249
3250 if (!hapd->conf->multi_ap)
3251 return WLAN_STATUS_SUCCESS;
3252
3253 if (multi_ap_ie) {
3254 const u8 *multi_ap_subelem;
3255
3256 multi_ap_subelem = get_ie(multi_ap_ie + 4,
3257 multi_ap_len - 4,
3258 MULTI_AP_SUB_ELEM_TYPE);
3259 if (multi_ap_subelem && multi_ap_subelem[1] == 1) {
3260 multi_ap_value = multi_ap_subelem[2];
3261 } else {
3262 hostapd_logger(hapd, sta->addr,
3263 HOSTAPD_MODULE_IEEE80211,
3264 HOSTAPD_LEVEL_INFO,
3265 "Multi-AP IE has missing or invalid Multi-AP subelement");
3266 return WLAN_STATUS_INVALID_IE;
3267 }
3268 }
3269
3270 if (multi_ap_value && multi_ap_value != MULTI_AP_BACKHAUL_STA)
3271 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
3272 HOSTAPD_LEVEL_INFO,
3273 "Multi-AP IE with unexpected value 0x%02x",
3274 multi_ap_value);
3275
3276 if (!(multi_ap_value & MULTI_AP_BACKHAUL_STA)) {
3277 if (hapd->conf->multi_ap & FRONTHAUL_BSS)
3278 return WLAN_STATUS_SUCCESS;
3279
3280 hostapd_logger(hapd, sta->addr,
3281 HOSTAPD_MODULE_IEEE80211,
3282 HOSTAPD_LEVEL_INFO,
3283 "Non-Multi-AP STA tries to associate with backhaul-only BSS");
3284 return WLAN_STATUS_ASSOC_DENIED_UNSPEC;
3285 }
3286
3287 if (!(hapd->conf->multi_ap & BACKHAUL_BSS))
3288 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
3289 HOSTAPD_LEVEL_DEBUG,
3290 "Backhaul STA tries to associate with fronthaul-only BSS");
3291
3292 sta->flags |= WLAN_STA_MULTI_AP;
3293 return WLAN_STATUS_SUCCESS;
3294 }
3295
3296
copy_supp_rates(struct hostapd_data * hapd,struct sta_info * sta,struct ieee802_11_elems * elems)3297 static u16 copy_supp_rates(struct hostapd_data *hapd, struct sta_info *sta,
3298 struct ieee802_11_elems *elems)
3299 {
3300 /* Supported rates not used in IEEE 802.11ad/DMG */
3301 if (hapd->iface->current_mode &&
3302 hapd->iface->current_mode->mode == HOSTAPD_MODE_IEEE80211AD)
3303 return WLAN_STATUS_SUCCESS;
3304
3305 if (!elems->supp_rates) {
3306 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
3307 HOSTAPD_LEVEL_DEBUG,
3308 "No supported rates element in AssocReq");
3309 return WLAN_STATUS_UNSPECIFIED_FAILURE;
3310 }
3311
3312 if (elems->supp_rates_len + elems->ext_supp_rates_len >
3313 sizeof(sta->supported_rates)) {
3314 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
3315 HOSTAPD_LEVEL_DEBUG,
3316 "Invalid supported rates element length %d+%d",
3317 elems->supp_rates_len,
3318 elems->ext_supp_rates_len);
3319 return WLAN_STATUS_UNSPECIFIED_FAILURE;
3320 }
3321
3322 sta->supported_rates_len = merge_byte_arrays(
3323 sta->supported_rates, sizeof(sta->supported_rates),
3324 elems->supp_rates, elems->supp_rates_len,
3325 elems->ext_supp_rates, elems->ext_supp_rates_len);
3326
3327 return WLAN_STATUS_SUCCESS;
3328 }
3329
3330
3331 #ifdef CONFIG_OWE
3332
owe_group_supported(struct hostapd_data * hapd,u16 group)3333 static int owe_group_supported(struct hostapd_data *hapd, u16 group)
3334 {
3335 int i;
3336 int *groups = hapd->conf->owe_groups;
3337
3338 if (group != 19 && group != 20 && group != 21)
3339 return 0;
3340
3341 if (!groups)
3342 return 1;
3343
3344 for (i = 0; groups[i] > 0; i++) {
3345 if (groups[i] == group)
3346 return 1;
3347 }
3348
3349 return 0;
3350 }
3351
3352
owe_process_assoc_req(struct hostapd_data * hapd,struct sta_info * sta,const u8 * owe_dh,u8 owe_dh_len)3353 static u16 owe_process_assoc_req(struct hostapd_data *hapd,
3354 struct sta_info *sta, const u8 *owe_dh,
3355 u8 owe_dh_len)
3356 {
3357 struct wpabuf *secret, *pub, *hkey;
3358 int res;
3359 u8 prk[SHA512_MAC_LEN], pmkid[SHA512_MAC_LEN];
3360 const char *info = "OWE Key Generation";
3361 const u8 *addr[2];
3362 size_t len[2];
3363 u16 group;
3364 size_t hash_len, prime_len;
3365
3366 if (wpa_auth_sta_get_pmksa(sta->wpa_sm)) {
3367 wpa_printf(MSG_DEBUG, "OWE: Using PMKSA caching");
3368 return WLAN_STATUS_SUCCESS;
3369 }
3370
3371 group = WPA_GET_LE16(owe_dh);
3372 if (!owe_group_supported(hapd, group)) {
3373 wpa_printf(MSG_DEBUG, "OWE: Unsupported DH group %u", group);
3374 return WLAN_STATUS_FINITE_CYCLIC_GROUP_NOT_SUPPORTED;
3375 }
3376 if (group == 19)
3377 prime_len = 32;
3378 else if (group == 20)
3379 prime_len = 48;
3380 else if (group == 21)
3381 prime_len = 66;
3382 else
3383 return WLAN_STATUS_FINITE_CYCLIC_GROUP_NOT_SUPPORTED;
3384
3385 if (sta->owe_group == group && sta->owe_ecdh) {
3386 /* This is a workaround for mac80211 behavior of retransmitting
3387 * the Association Request frames multiple times if the link
3388 * layer retries (i.e., seq# remains same) fail. The mac80211
3389 * initiated retransmission will use a different seq# and as
3390 * such, will go through duplicate detection. If we were to
3391 * change our DH key for that attempt, there would be two
3392 * different DH shared secrets and the STA would likely select
3393 * the wrong one. */
3394 wpa_printf(MSG_DEBUG,
3395 "OWE: Try to reuse own previous DH key since the STA tried to go through OWE association again");
3396 } else {
3397 crypto_ecdh_deinit(sta->owe_ecdh);
3398 sta->owe_ecdh = crypto_ecdh_init(group);
3399 }
3400 if (!sta->owe_ecdh)
3401 return WLAN_STATUS_FINITE_CYCLIC_GROUP_NOT_SUPPORTED;
3402 sta->owe_group = group;
3403
3404 secret = crypto_ecdh_set_peerkey(sta->owe_ecdh, 0, owe_dh + 2,
3405 owe_dh_len - 2);
3406 secret = wpabuf_zeropad(secret, prime_len);
3407 if (!secret) {
3408 wpa_printf(MSG_DEBUG, "OWE: Invalid peer DH public key");
3409 return WLAN_STATUS_UNSPECIFIED_FAILURE;
3410 }
3411 wpa_hexdump_buf_key(MSG_DEBUG, "OWE: DH shared secret", secret);
3412
3413 /* prk = HKDF-extract(C | A | group, z) */
3414
3415 pub = crypto_ecdh_get_pubkey(sta->owe_ecdh, 0);
3416 if (!pub) {
3417 wpabuf_clear_free(secret);
3418 return WLAN_STATUS_UNSPECIFIED_FAILURE;
3419 }
3420
3421 /* PMKID = Truncate-128(Hash(C | A)) */
3422 addr[0] = owe_dh + 2;
3423 len[0] = owe_dh_len - 2;
3424 addr[1] = wpabuf_head(pub);
3425 len[1] = wpabuf_len(pub);
3426 if (group == 19) {
3427 res = sha256_vector(2, addr, len, pmkid);
3428 hash_len = SHA256_MAC_LEN;
3429 } else if (group == 20) {
3430 res = sha384_vector(2, addr, len, pmkid);
3431 hash_len = SHA384_MAC_LEN;
3432 } else if (group == 21) {
3433 res = sha512_vector(2, addr, len, pmkid);
3434 hash_len = SHA512_MAC_LEN;
3435 } else {
3436 wpabuf_free(pub);
3437 wpabuf_clear_free(secret);
3438 return WLAN_STATUS_UNSPECIFIED_FAILURE;
3439 }
3440 pub = wpabuf_zeropad(pub, prime_len);
3441 if (res < 0 || !pub) {
3442 wpabuf_free(pub);
3443 wpabuf_clear_free(secret);
3444 return WLAN_STATUS_UNSPECIFIED_FAILURE;
3445 }
3446
3447 hkey = wpabuf_alloc(owe_dh_len - 2 + wpabuf_len(pub) + 2);
3448 if (!hkey) {
3449 wpabuf_free(pub);
3450 wpabuf_clear_free(secret);
3451 return WLAN_STATUS_UNSPECIFIED_FAILURE;
3452 }
3453
3454 wpabuf_put_data(hkey, owe_dh + 2, owe_dh_len - 2); /* C */
3455 wpabuf_put_buf(hkey, pub); /* A */
3456 wpabuf_free(pub);
3457 wpabuf_put_le16(hkey, group); /* group */
3458 if (group == 19)
3459 res = hmac_sha256(wpabuf_head(hkey), wpabuf_len(hkey),
3460 wpabuf_head(secret), wpabuf_len(secret), prk);
3461 else if (group == 20)
3462 res = hmac_sha384(wpabuf_head(hkey), wpabuf_len(hkey),
3463 wpabuf_head(secret), wpabuf_len(secret), prk);
3464 else if (group == 21)
3465 res = hmac_sha512(wpabuf_head(hkey), wpabuf_len(hkey),
3466 wpabuf_head(secret), wpabuf_len(secret), prk);
3467 wpabuf_clear_free(hkey);
3468 wpabuf_clear_free(secret);
3469 if (res < 0)
3470 return WLAN_STATUS_UNSPECIFIED_FAILURE;
3471
3472 wpa_hexdump_key(MSG_DEBUG, "OWE: prk", prk, hash_len);
3473
3474 /* PMK = HKDF-expand(prk, "OWE Key Generation", n) */
3475
3476 os_free(sta->owe_pmk);
3477 sta->owe_pmk = os_malloc(hash_len);
3478 if (!sta->owe_pmk) {
3479 os_memset(prk, 0, SHA512_MAC_LEN);
3480 return WLAN_STATUS_UNSPECIFIED_FAILURE;
3481 }
3482
3483 if (group == 19)
3484 res = hmac_sha256_kdf(prk, hash_len, NULL, (const u8 *) info,
3485 os_strlen(info), sta->owe_pmk, hash_len);
3486 else if (group == 20)
3487 res = hmac_sha384_kdf(prk, hash_len, NULL, (const u8 *) info,
3488 os_strlen(info), sta->owe_pmk, hash_len);
3489 else if (group == 21)
3490 res = hmac_sha512_kdf(prk, hash_len, NULL, (const u8 *) info,
3491 os_strlen(info), sta->owe_pmk, hash_len);
3492 os_memset(prk, 0, SHA512_MAC_LEN);
3493 if (res < 0) {
3494 os_free(sta->owe_pmk);
3495 sta->owe_pmk = NULL;
3496 return WLAN_STATUS_UNSPECIFIED_FAILURE;
3497 }
3498 sta->owe_pmk_len = hash_len;
3499
3500 wpa_hexdump_key(MSG_DEBUG, "OWE: PMK", sta->owe_pmk, sta->owe_pmk_len);
3501 wpa_hexdump(MSG_DEBUG, "OWE: PMKID", pmkid, PMKID_LEN);
3502 wpa_auth_pmksa_add2(hapd->wpa_auth, sta->addr, sta->owe_pmk,
3503 sta->owe_pmk_len, pmkid, 0, WPA_KEY_MGMT_OWE);
3504
3505 return WLAN_STATUS_SUCCESS;
3506 }
3507
3508
owe_validate_request(struct hostapd_data * hapd,const u8 * peer,const u8 * rsn_ie,size_t rsn_ie_len,const u8 * owe_dh,size_t owe_dh_len)3509 u16 owe_validate_request(struct hostapd_data *hapd, const u8 *peer,
3510 const u8 *rsn_ie, size_t rsn_ie_len,
3511 const u8 *owe_dh, size_t owe_dh_len)
3512 {
3513 struct wpa_ie_data data;
3514 int res;
3515
3516 if (!rsn_ie || rsn_ie_len < 2) {
3517 wpa_printf(MSG_DEBUG, "OWE: Invalid RSNE from " MACSTR,
3518 MAC2STR(peer));
3519 return WLAN_STATUS_INVALID_IE;
3520 }
3521 rsn_ie -= 2;
3522 rsn_ie_len += 2;
3523
3524 res = wpa_parse_wpa_ie_rsn(rsn_ie, rsn_ie_len, &data);
3525 if (res) {
3526 wpa_printf(MSG_DEBUG, "Failed to parse RSNE from " MACSTR
3527 " (res=%d)", MAC2STR(peer), res);
3528 wpa_hexdump(MSG_DEBUG, "RSNE", rsn_ie, rsn_ie_len);
3529 return wpa_res_to_status_code(res);
3530 }
3531 if (!(data.key_mgmt & WPA_KEY_MGMT_OWE)) {
3532 wpa_printf(MSG_DEBUG,
3533 "OWE: Unexpected key mgmt 0x%x from " MACSTR,
3534 (unsigned int) data.key_mgmt, MAC2STR(peer));
3535 return WLAN_STATUS_AKMP_NOT_VALID;
3536 }
3537 if (!owe_dh) {
3538 wpa_printf(MSG_DEBUG,
3539 "OWE: No Diffie-Hellman Parameter element from "
3540 MACSTR, MAC2STR(peer));
3541 return WLAN_STATUS_AKMP_NOT_VALID;
3542 }
3543
3544 return WLAN_STATUS_SUCCESS;
3545 }
3546
3547
owe_process_rsn_ie(struct hostapd_data * hapd,struct sta_info * sta,const u8 * rsn_ie,size_t rsn_ie_len,const u8 * owe_dh,size_t owe_dh_len)3548 u16 owe_process_rsn_ie(struct hostapd_data *hapd,
3549 struct sta_info *sta,
3550 const u8 *rsn_ie, size_t rsn_ie_len,
3551 const u8 *owe_dh, size_t owe_dh_len)
3552 {
3553 u16 status;
3554 u8 *owe_buf, ie[256 * 2];
3555 size_t ie_len = 0;
3556 enum wpa_validate_result res;
3557
3558 if (!rsn_ie || rsn_ie_len < 2) {
3559 wpa_printf(MSG_DEBUG, "OWE: No RSNE in (Re)AssocReq");
3560 status = WLAN_STATUS_INVALID_IE;
3561 goto end;
3562 }
3563
3564 if (!sta->wpa_sm)
3565 sta->wpa_sm = wpa_auth_sta_init(hapd->wpa_auth, sta->addr,
3566 NULL);
3567 if (!sta->wpa_sm) {
3568 wpa_printf(MSG_WARNING,
3569 "OWE: Failed to initialize WPA state machine");
3570 status = WLAN_STATUS_UNSPECIFIED_FAILURE;
3571 goto end;
3572 }
3573 rsn_ie -= 2;
3574 rsn_ie_len += 2;
3575 res = wpa_validate_wpa_ie(hapd->wpa_auth, sta->wpa_sm,
3576 hapd->iface->freq, rsn_ie, rsn_ie_len,
3577 NULL, 0, NULL, 0, owe_dh, owe_dh_len);
3578 status = wpa_res_to_status_code(res);
3579 if (status != WLAN_STATUS_SUCCESS)
3580 goto end;
3581 status = owe_process_assoc_req(hapd, sta, owe_dh, owe_dh_len);
3582 if (status != WLAN_STATUS_SUCCESS)
3583 goto end;
3584 owe_buf = wpa_auth_write_assoc_resp_owe(sta->wpa_sm, ie, sizeof(ie),
3585 NULL, 0);
3586 if (!owe_buf) {
3587 status = WLAN_STATUS_UNSPECIFIED_FAILURE;
3588 goto end;
3589 }
3590
3591 if (sta->owe_ecdh) {
3592 struct wpabuf *pub;
3593
3594 pub = crypto_ecdh_get_pubkey(sta->owe_ecdh, 0);
3595 if (!pub) {
3596 status = WLAN_STATUS_UNSPECIFIED_FAILURE;
3597 goto end;
3598 }
3599
3600 /* OWE Diffie-Hellman Parameter element */
3601 *owe_buf++ = WLAN_EID_EXTENSION; /* Element ID */
3602 *owe_buf++ = 1 + 2 + wpabuf_len(pub); /* Length */
3603 *owe_buf++ = WLAN_EID_EXT_OWE_DH_PARAM; /* Element ID Extension
3604 */
3605 WPA_PUT_LE16(owe_buf, sta->owe_group);
3606 owe_buf += 2;
3607 os_memcpy(owe_buf, wpabuf_head(pub), wpabuf_len(pub));
3608 owe_buf += wpabuf_len(pub);
3609 wpabuf_free(pub);
3610 sta->external_dh_updated = 1;
3611 }
3612 ie_len = owe_buf - ie;
3613
3614 end:
3615 wpa_printf(MSG_DEBUG, "OWE: Update status %d, ie len %d for peer "
3616 MACSTR, status, (unsigned int) ie_len,
3617 MAC2STR(sta->addr));
3618 hostapd_drv_update_dh_ie(hapd, sta->addr, status,
3619 status == WLAN_STATUS_SUCCESS ? ie : NULL,
3620 ie_len);
3621
3622 return status;
3623 }
3624
3625 #endif /* CONFIG_OWE */
3626
3627
check_sa_query(struct hostapd_data * hapd,struct sta_info * sta,int reassoc)3628 static bool check_sa_query(struct hostapd_data *hapd, struct sta_info *sta,
3629 int reassoc)
3630 {
3631 if ((sta->flags &
3632 (WLAN_STA_ASSOC | WLAN_STA_MFP | WLAN_STA_AUTHORIZED)) !=
3633 (WLAN_STA_ASSOC | WLAN_STA_MFP | WLAN_STA_AUTHORIZED))
3634 return false;
3635
3636 if (!sta->sa_query_timed_out && sta->sa_query_count > 0)
3637 ap_check_sa_query_timeout(hapd, sta);
3638
3639 if (!sta->sa_query_timed_out &&
3640 (!reassoc || sta->auth_alg != WLAN_AUTH_FT)) {
3641 /*
3642 * STA has already been associated with MFP and SA Query timeout
3643 * has not been reached. Reject the association attempt
3644 * temporarily and start SA Query, if one is not pending.
3645 */
3646 if (sta->sa_query_count == 0)
3647 ap_sta_start_sa_query(hapd, sta);
3648
3649 return true;
3650 }
3651
3652 return false;
3653 }
3654
3655
__check_assoc_ies(struct hostapd_data * hapd,struct sta_info * sta,const u8 * ies,size_t ies_len,struct ieee802_11_elems * elems,int reassoc)3656 static int __check_assoc_ies(struct hostapd_data *hapd, struct sta_info *sta,
3657 const u8 *ies, size_t ies_len,
3658 struct ieee802_11_elems *elems, int reassoc)
3659 {
3660 int resp;
3661 const u8 *wpa_ie;
3662 size_t wpa_ie_len;
3663 const u8 *p2p_dev_addr = NULL;
3664
3665 resp = check_ssid(hapd, sta, elems->ssid, elems->ssid_len);
3666 if (resp != WLAN_STATUS_SUCCESS)
3667 return resp;
3668 resp = check_wmm(hapd, sta, elems->wmm, elems->wmm_len);
3669 if (resp != WLAN_STATUS_SUCCESS)
3670 return resp;
3671 resp = check_ext_capab(hapd, sta, elems->ext_capab,
3672 elems->ext_capab_len);
3673 if (resp != WLAN_STATUS_SUCCESS)
3674 return resp;
3675 resp = copy_supp_rates(hapd, sta, elems);
3676 if (resp != WLAN_STATUS_SUCCESS)
3677 return resp;
3678
3679 resp = check_multi_ap(hapd, sta, elems->multi_ap, elems->multi_ap_len);
3680 if (resp != WLAN_STATUS_SUCCESS)
3681 return resp;
3682
3683 resp = copy_sta_ht_capab(hapd, sta, elems->ht_capabilities);
3684 if (resp != WLAN_STATUS_SUCCESS)
3685 return resp;
3686 if (hapd->iconf->ieee80211n && hapd->iconf->require_ht &&
3687 !(sta->flags & WLAN_STA_HT)) {
3688 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
3689 HOSTAPD_LEVEL_INFO, "Station does not support "
3690 "mandatory HT PHY - reject association");
3691 return WLAN_STATUS_ASSOC_DENIED_NO_HT;
3692 }
3693
3694 #ifdef CONFIG_IEEE80211AC
3695 if (hapd->iconf->ieee80211ac) {
3696 resp = copy_sta_vht_capab(hapd, sta, elems->vht_capabilities);
3697 if (resp != WLAN_STATUS_SUCCESS)
3698 return resp;
3699
3700 resp = set_sta_vht_opmode(hapd, sta, elems->opmode_notif);
3701 if (resp != WLAN_STATUS_SUCCESS)
3702 return resp;
3703 }
3704
3705 if (hapd->iconf->ieee80211ac && hapd->iconf->require_vht &&
3706 !(sta->flags & WLAN_STA_VHT)) {
3707 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
3708 HOSTAPD_LEVEL_INFO, "Station does not support "
3709 "mandatory VHT PHY - reject association");
3710 return WLAN_STATUS_ASSOC_DENIED_NO_VHT;
3711 }
3712
3713 if (hapd->conf->vendor_vht && !elems->vht_capabilities) {
3714 resp = copy_sta_vendor_vht(hapd, sta, elems->vendor_vht,
3715 elems->vendor_vht_len);
3716 if (resp != WLAN_STATUS_SUCCESS)
3717 return resp;
3718 }
3719 #endif /* CONFIG_IEEE80211AC */
3720 #ifdef CONFIG_IEEE80211AX
3721 if (hapd->iconf->ieee80211ax && !hapd->conf->disable_11ax) {
3722 resp = copy_sta_he_capab(hapd, sta, IEEE80211_MODE_AP,
3723 elems->he_capabilities,
3724 elems->he_capabilities_len);
3725 if (resp != WLAN_STATUS_SUCCESS)
3726 return resp;
3727
3728 if (hapd->iconf->require_he && !(sta->flags & WLAN_STA_HE)) {
3729 hostapd_logger(hapd, sta->addr,
3730 HOSTAPD_MODULE_IEEE80211,
3731 HOSTAPD_LEVEL_INFO,
3732 "Station does not support mandatory HE PHY - reject association");
3733 return WLAN_STATUS_DENIED_HE_NOT_SUPPORTED;
3734 }
3735
3736 if (is_6ghz_op_class(hapd->iconf->op_class)) {
3737 if (!(sta->flags & WLAN_STA_HE)) {
3738 hostapd_logger(hapd, sta->addr,
3739 HOSTAPD_MODULE_IEEE80211,
3740 HOSTAPD_LEVEL_INFO,
3741 "Station does not support mandatory HE PHY - reject association");
3742 return WLAN_STATUS_DENIED_HE_NOT_SUPPORTED;
3743 }
3744 resp = copy_sta_he_6ghz_capab(hapd, sta,
3745 elems->he_6ghz_band_cap);
3746 if (resp != WLAN_STATUS_SUCCESS)
3747 return resp;
3748 }
3749 }
3750 #endif /* CONFIG_IEEE80211AX */
3751 #ifdef CONFIG_IEEE80211BE
3752 if (hapd->iconf->ieee80211be && !hapd->conf->disable_11be) {
3753 resp = copy_sta_eht_capab(hapd, sta, IEEE80211_MODE_AP,
3754 elems->he_capabilities,
3755 elems->he_capabilities_len,
3756 elems->eht_capabilities,
3757 elems->eht_capabilities_len);
3758 if (resp != WLAN_STATUS_SUCCESS)
3759 return resp;
3760 }
3761 #endif /* CONFIG_IEEE80211BE */
3762
3763 #ifdef CONFIG_P2P
3764 if (elems->p2p && ies && ies_len) {
3765 wpabuf_free(sta->p2p_ie);
3766 sta->p2p_ie = ieee802_11_vendor_ie_concat(ies, ies_len,
3767 P2P_IE_VENDOR_TYPE);
3768 if (sta->p2p_ie)
3769 p2p_dev_addr = p2p_get_go_dev_addr(sta->p2p_ie);
3770 } else {
3771 wpabuf_free(sta->p2p_ie);
3772 sta->p2p_ie = NULL;
3773 }
3774 #endif /* CONFIG_P2P */
3775
3776 if ((hapd->conf->wpa & WPA_PROTO_RSN) && elems->rsn_ie) {
3777 wpa_ie = elems->rsn_ie;
3778 wpa_ie_len = elems->rsn_ie_len;
3779 } else if ((hapd->conf->wpa & WPA_PROTO_WPA) &&
3780 elems->wpa_ie) {
3781 wpa_ie = elems->wpa_ie;
3782 wpa_ie_len = elems->wpa_ie_len;
3783 } else {
3784 wpa_ie = NULL;
3785 wpa_ie_len = 0;
3786 }
3787
3788 #ifdef CONFIG_WPS
3789 sta->flags &= ~(WLAN_STA_WPS | WLAN_STA_MAYBE_WPS | WLAN_STA_WPS2);
3790 if (hapd->conf->wps_state && elems->wps_ie && ies && ies_len) {
3791 wpa_printf(MSG_DEBUG, "STA included WPS IE in (Re)Association "
3792 "Request - assume WPS is used");
3793 if (check_sa_query(hapd, sta, reassoc))
3794 return WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY;
3795 sta->flags |= WLAN_STA_WPS;
3796 wpabuf_free(sta->wps_ie);
3797 sta->wps_ie = ieee802_11_vendor_ie_concat(ies, ies_len,
3798 WPS_IE_VENDOR_TYPE);
3799 if (sta->wps_ie && wps_is_20(sta->wps_ie)) {
3800 wpa_printf(MSG_DEBUG, "WPS: STA supports WPS 2.0");
3801 sta->flags |= WLAN_STA_WPS2;
3802 }
3803 wpa_ie = NULL;
3804 wpa_ie_len = 0;
3805 if (sta->wps_ie && wps_validate_assoc_req(sta->wps_ie) < 0) {
3806 wpa_printf(MSG_DEBUG, "WPS: Invalid WPS IE in "
3807 "(Re)Association Request - reject");
3808 return WLAN_STATUS_INVALID_IE;
3809 }
3810 } else if (hapd->conf->wps_state && wpa_ie == NULL) {
3811 wpa_printf(MSG_DEBUG, "STA did not include WPA/RSN IE in "
3812 "(Re)Association Request - possible WPS use");
3813 sta->flags |= WLAN_STA_MAYBE_WPS;
3814 } else
3815 #endif /* CONFIG_WPS */
3816 if (hapd->conf->wpa && wpa_ie == NULL) {
3817 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
3818 HOSTAPD_LEVEL_INFO,
3819 "No WPA/RSN IE in association request");
3820 return WLAN_STATUS_INVALID_IE;
3821 }
3822
3823 if (hapd->conf->wpa && wpa_ie) {
3824 enum wpa_validate_result res;
3825
3826 if (check_sa_query(hapd, sta, reassoc))
3827 return WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY;
3828
3829 wpa_ie -= 2;
3830 wpa_ie_len += 2;
3831 if (sta->wpa_sm == NULL)
3832 sta->wpa_sm = wpa_auth_sta_init(hapd->wpa_auth,
3833 sta->addr,
3834 p2p_dev_addr);
3835 if (sta->wpa_sm == NULL) {
3836 wpa_printf(MSG_WARNING, "Failed to initialize WPA "
3837 "state machine");
3838 return WLAN_STATUS_UNSPECIFIED_FAILURE;
3839 }
3840 wpa_auth_set_auth_alg(sta->wpa_sm, sta->auth_alg);
3841 res = wpa_validate_wpa_ie(hapd->wpa_auth, sta->wpa_sm,
3842 hapd->iface->freq,
3843 wpa_ie, wpa_ie_len,
3844 elems->rsnxe ? elems->rsnxe - 2 :
3845 NULL,
3846 elems->rsnxe ? elems->rsnxe_len + 2 :
3847 0,
3848 elems->mdie, elems->mdie_len,
3849 elems->owe_dh, elems->owe_dh_len);
3850 resp = wpa_res_to_status_code(res);
3851 if (resp != WLAN_STATUS_SUCCESS)
3852 return resp;
3853
3854 if (wpa_auth_uses_mfp(sta->wpa_sm))
3855 sta->flags |= WLAN_STA_MFP;
3856 else
3857 sta->flags &= ~WLAN_STA_MFP;
3858
3859 #ifdef CONFIG_IEEE80211R_AP
3860 if (sta->auth_alg == WLAN_AUTH_FT) {
3861 if (!reassoc) {
3862 wpa_printf(MSG_DEBUG, "FT: " MACSTR " tried "
3863 "to use association (not "
3864 "re-association) with FT auth_alg",
3865 MAC2STR(sta->addr));
3866 return WLAN_STATUS_UNSPECIFIED_FAILURE;
3867 }
3868
3869 resp = wpa_ft_validate_reassoc(sta->wpa_sm, ies,
3870 ies_len);
3871 if (resp != WLAN_STATUS_SUCCESS)
3872 return resp;
3873 }
3874 #endif /* CONFIG_IEEE80211R_AP */
3875
3876 #ifdef CONFIG_SAE
3877 if (wpa_auth_uses_sae(sta->wpa_sm) && sta->sae &&
3878 sta->sae->state == SAE_ACCEPTED)
3879 wpa_auth_add_sae_pmkid(sta->wpa_sm, sta->sae->pmkid);
3880
3881 if (wpa_auth_uses_sae(sta->wpa_sm) &&
3882 sta->auth_alg == WLAN_AUTH_OPEN) {
3883 struct rsn_pmksa_cache_entry *sa;
3884 sa = wpa_auth_sta_get_pmksa(sta->wpa_sm);
3885 if (!sa || !wpa_key_mgmt_sae(sa->akmp)) {
3886 wpa_printf(MSG_DEBUG,
3887 "SAE: No PMKSA cache entry found for "
3888 MACSTR, MAC2STR(sta->addr));
3889 return WLAN_STATUS_INVALID_PMKID;
3890 }
3891 wpa_printf(MSG_DEBUG, "SAE: " MACSTR
3892 " using PMKSA caching", MAC2STR(sta->addr));
3893 } else if (wpa_auth_uses_sae(sta->wpa_sm) &&
3894 sta->auth_alg != WLAN_AUTH_SAE &&
3895 !(sta->auth_alg == WLAN_AUTH_FT &&
3896 wpa_auth_uses_ft_sae(sta->wpa_sm))) {
3897 wpa_printf(MSG_DEBUG, "SAE: " MACSTR " tried to use "
3898 "SAE AKM after non-SAE auth_alg %u",
3899 MAC2STR(sta->addr), sta->auth_alg);
3900 return WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG;
3901 }
3902
3903 if (hapd->conf->sae_pwe == SAE_PWE_BOTH &&
3904 sta->auth_alg == WLAN_AUTH_SAE &&
3905 sta->sae && !sta->sae->h2e &&
3906 ieee802_11_rsnx_capab_len(elems->rsnxe, elems->rsnxe_len,
3907 WLAN_RSNX_CAPAB_SAE_H2E)) {
3908 wpa_printf(MSG_INFO, "SAE: " MACSTR
3909 " indicates support for SAE H2E, but did not use it",
3910 MAC2STR(sta->addr));
3911 return WLAN_STATUS_UNSPECIFIED_FAILURE;
3912 }
3913 #endif /* CONFIG_SAE */
3914
3915 #ifdef CONFIG_OWE
3916 if ((hapd->conf->wpa_key_mgmt & WPA_KEY_MGMT_OWE) &&
3917 wpa_auth_sta_key_mgmt(sta->wpa_sm) == WPA_KEY_MGMT_OWE &&
3918 elems->owe_dh) {
3919 resp = owe_process_assoc_req(hapd, sta, elems->owe_dh,
3920 elems->owe_dh_len);
3921 if (resp != WLAN_STATUS_SUCCESS)
3922 return resp;
3923 }
3924 #endif /* CONFIG_OWE */
3925
3926 #ifdef CONFIG_DPP2
3927 dpp_pfs_free(sta->dpp_pfs);
3928 sta->dpp_pfs = NULL;
3929
3930 if (DPP_VERSION > 1 &&
3931 (hapd->conf->wpa_key_mgmt & WPA_KEY_MGMT_DPP) &&
3932 hapd->conf->dpp_netaccesskey && sta->wpa_sm &&
3933 wpa_auth_sta_key_mgmt(sta->wpa_sm) == WPA_KEY_MGMT_DPP &&
3934 elems->owe_dh) {
3935 sta->dpp_pfs = dpp_pfs_init(
3936 wpabuf_head(hapd->conf->dpp_netaccesskey),
3937 wpabuf_len(hapd->conf->dpp_netaccesskey));
3938 if (!sta->dpp_pfs) {
3939 wpa_printf(MSG_DEBUG,
3940 "DPP: Could not initialize PFS");
3941 /* Try to continue without PFS */
3942 goto pfs_fail;
3943 }
3944
3945 if (dpp_pfs_process(sta->dpp_pfs, elems->owe_dh,
3946 elems->owe_dh_len) < 0) {
3947 dpp_pfs_free(sta->dpp_pfs);
3948 sta->dpp_pfs = NULL;
3949 return WLAN_STATUS_UNSPECIFIED_FAILURE;
3950 }
3951 }
3952
3953 wpa_auth_set_dpp_z(sta->wpa_sm, sta->dpp_pfs ?
3954 sta->dpp_pfs->secret : NULL);
3955 pfs_fail:
3956 #endif /* CONFIG_DPP2 */
3957
3958 if ((sta->flags & (WLAN_STA_HT | WLAN_STA_VHT)) &&
3959 wpa_auth_get_pairwise(sta->wpa_sm) == WPA_CIPHER_TKIP) {
3960 hostapd_logger(hapd, sta->addr,
3961 HOSTAPD_MODULE_IEEE80211,
3962 HOSTAPD_LEVEL_INFO,
3963 "Station tried to use TKIP with HT "
3964 "association");
3965 return WLAN_STATUS_CIPHER_REJECTED_PER_POLICY;
3966 }
3967 #ifdef CONFIG_HS20
3968 } else if (hapd->conf->osen) {
3969 if (!elems->osen) {
3970 hostapd_logger(
3971 hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
3972 HOSTAPD_LEVEL_INFO,
3973 "No HS 2.0 OSEN element in association request");
3974 return WLAN_STATUS_INVALID_IE;
3975 }
3976
3977 wpa_printf(MSG_DEBUG, "HS 2.0: OSEN association");
3978 if (sta->wpa_sm == NULL)
3979 sta->wpa_sm = wpa_auth_sta_init(hapd->wpa_auth,
3980 sta->addr, NULL);
3981 if (sta->wpa_sm == NULL) {
3982 wpa_printf(MSG_WARNING, "Failed to initialize WPA "
3983 "state machine");
3984 return WLAN_STATUS_UNSPECIFIED_FAILURE;
3985 }
3986 if (wpa_validate_osen(hapd->wpa_auth, sta->wpa_sm,
3987 elems->osen - 2, elems->osen_len + 2) < 0)
3988 return WLAN_STATUS_INVALID_IE;
3989 #endif /* CONFIG_HS20 */
3990 } else
3991 wpa_auth_sta_no_wpa(sta->wpa_sm);
3992
3993 #ifdef CONFIG_P2P
3994 p2p_group_notif_assoc(hapd->p2p_group, sta->addr, ies, ies_len);
3995 #endif /* CONFIG_P2P */
3996
3997 #ifdef CONFIG_HS20
3998 wpabuf_free(sta->hs20_ie);
3999 if (elems->hs20 && elems->hs20_len > 4) {
4000 int release;
4001
4002 sta->hs20_ie = wpabuf_alloc_copy(elems->hs20 + 4,
4003 elems->hs20_len - 4);
4004 release = ((elems->hs20[4] >> 4) & 0x0f) + 1;
4005 if (release >= 2 && !wpa_auth_uses_mfp(sta->wpa_sm) &&
4006 hapd->conf->ieee80211w != NO_MGMT_FRAME_PROTECTION) {
4007 wpa_printf(MSG_DEBUG,
4008 "HS 2.0: PMF not negotiated by release %d station "
4009 MACSTR, release, MAC2STR(sta->addr));
4010 return WLAN_STATUS_ROBUST_MGMT_FRAME_POLICY_VIOLATION;
4011 }
4012 } else {
4013 sta->hs20_ie = NULL;
4014 }
4015
4016 wpabuf_free(sta->roaming_consortium);
4017 if (elems->roaming_cons_sel)
4018 sta->roaming_consortium = wpabuf_alloc_copy(
4019 elems->roaming_cons_sel + 4,
4020 elems->roaming_cons_sel_len - 4);
4021 else
4022 sta->roaming_consortium = NULL;
4023 #endif /* CONFIG_HS20 */
4024
4025 #ifdef CONFIG_FST
4026 wpabuf_free(sta->mb_ies);
4027 if (hapd->iface->fst)
4028 sta->mb_ies = mb_ies_by_info(&elems->mb_ies);
4029 else
4030 sta->mb_ies = NULL;
4031 #endif /* CONFIG_FST */
4032
4033 #ifdef CONFIG_MBO
4034 mbo_ap_check_sta_assoc(hapd, sta, elems);
4035
4036 if (hapd->conf->mbo_enabled && (hapd->conf->wpa & 2) &&
4037 elems->mbo && sta->cell_capa && !(sta->flags & WLAN_STA_MFP) &&
4038 hapd->conf->ieee80211w != NO_MGMT_FRAME_PROTECTION) {
4039 wpa_printf(MSG_INFO,
4040 "MBO: Reject WPA2 association without PMF");
4041 return WLAN_STATUS_UNSPECIFIED_FAILURE;
4042 }
4043 #endif /* CONFIG_MBO */
4044
4045 #if defined(CONFIG_FILS) && defined(CONFIG_OCV)
4046 if (wpa_auth_uses_ocv(sta->wpa_sm) &&
4047 (sta->auth_alg == WLAN_AUTH_FILS_SK ||
4048 sta->auth_alg == WLAN_AUTH_FILS_SK_PFS ||
4049 sta->auth_alg == WLAN_AUTH_FILS_PK)) {
4050 struct wpa_channel_info ci;
4051 int tx_chanwidth;
4052 int tx_seg1_idx;
4053 enum oci_verify_result res;
4054
4055 if (hostapd_drv_channel_info(hapd, &ci) != 0) {
4056 wpa_printf(MSG_WARNING,
4057 "Failed to get channel info to validate received OCI in FILS (Re)Association Request frame");
4058 return WLAN_STATUS_UNSPECIFIED_FAILURE;
4059 }
4060
4061 if (get_sta_tx_parameters(sta->wpa_sm,
4062 channel_width_to_int(ci.chanwidth),
4063 ci.seg1_idx, &tx_chanwidth,
4064 &tx_seg1_idx) < 0)
4065 return WLAN_STATUS_UNSPECIFIED_FAILURE;
4066
4067 res = ocv_verify_tx_params(elems->oci, elems->oci_len, &ci,
4068 tx_chanwidth, tx_seg1_idx);
4069 if (wpa_auth_uses_ocv(sta->wpa_sm) == 2 &&
4070 res == OCI_NOT_FOUND) {
4071 /* Work around misbehaving STAs */
4072 wpa_printf(MSG_INFO,
4073 "FILS: Disable OCV with a STA that does not send OCI");
4074 wpa_auth_set_ocv(sta->wpa_sm, 0);
4075 } else if (res != OCI_SUCCESS) {
4076 wpa_printf(MSG_WARNING, "FILS: OCV failed: %s",
4077 ocv_errorstr);
4078 wpa_msg(hapd->msg_ctx, MSG_INFO, OCV_FAILURE "addr="
4079 MACSTR " frame=fils-reassoc-req error=%s",
4080 MAC2STR(sta->addr), ocv_errorstr);
4081 return WLAN_STATUS_UNSPECIFIED_FAILURE;
4082 }
4083 }
4084 #endif /* CONFIG_FILS && CONFIG_OCV */
4085
4086 ap_copy_sta_supp_op_classes(sta, elems->supp_op_classes,
4087 elems->supp_op_classes_len);
4088
4089 if ((sta->capability & WLAN_CAPABILITY_RADIO_MEASUREMENT) &&
4090 elems->rrm_enabled &&
4091 elems->rrm_enabled_len >= sizeof(sta->rrm_enabled_capa))
4092 os_memcpy(sta->rrm_enabled_capa, elems->rrm_enabled,
4093 sizeof(sta->rrm_enabled_capa));
4094
4095 if (elems->power_capab) {
4096 sta->min_tx_power = elems->power_capab[0];
4097 sta->max_tx_power = elems->power_capab[1];
4098 sta->power_capab = 1;
4099 } else {
4100 sta->power_capab = 0;
4101 }
4102
4103 return WLAN_STATUS_SUCCESS;
4104 }
4105
4106
check_assoc_ies(struct hostapd_data * hapd,struct sta_info * sta,const u8 * ies,size_t ies_len,int reassoc)4107 static int check_assoc_ies(struct hostapd_data *hapd, struct sta_info *sta,
4108 const u8 *ies, size_t ies_len, int reassoc)
4109 {
4110 struct ieee802_11_elems elems;
4111
4112 if (ieee802_11_parse_elems(ies, ies_len, &elems, 1) == ParseFailed) {
4113 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
4114 HOSTAPD_LEVEL_INFO,
4115 "Station sent an invalid association request");
4116 return WLAN_STATUS_UNSPECIFIED_FAILURE;
4117 }
4118
4119 return __check_assoc_ies(hapd, sta, ies, ies_len, &elems, reassoc);
4120 }
4121
4122
send_deauth(struct hostapd_data * hapd,const u8 * addr,u16 reason_code)4123 static void send_deauth(struct hostapd_data *hapd, const u8 *addr,
4124 u16 reason_code)
4125 {
4126 int send_len;
4127 struct ieee80211_mgmt reply;
4128
4129 os_memset(&reply, 0, sizeof(reply));
4130 reply.frame_control =
4131 IEEE80211_FC(WLAN_FC_TYPE_MGMT, WLAN_FC_STYPE_DEAUTH);
4132 os_memcpy(reply.da, addr, ETH_ALEN);
4133 os_memcpy(reply.sa, hapd->own_addr, ETH_ALEN);
4134 os_memcpy(reply.bssid, hapd->own_addr, ETH_ALEN);
4135
4136 send_len = IEEE80211_HDRLEN + sizeof(reply.u.deauth);
4137 reply.u.deauth.reason_code = host_to_le16(reason_code);
4138
4139 if (hostapd_drv_send_mlme(hapd, &reply, send_len, 0, NULL, 0, 0) < 0)
4140 wpa_printf(MSG_INFO, "Failed to send deauth: %s",
4141 strerror(errno));
4142 }
4143
4144
add_associated_sta(struct hostapd_data * hapd,struct sta_info * sta,int reassoc)4145 static int add_associated_sta(struct hostapd_data *hapd,
4146 struct sta_info *sta, int reassoc)
4147 {
4148 struct ieee80211_ht_capabilities ht_cap;
4149 struct ieee80211_vht_capabilities vht_cap;
4150 struct ieee80211_he_capabilities he_cap;
4151 struct ieee80211_eht_capabilities eht_cap;
4152 int set = 1;
4153
4154 /*
4155 * Remove the STA entry to ensure the STA PS state gets cleared and
4156 * configuration gets updated. This is relevant for cases, such as
4157 * FT-over-the-DS, where a station re-associates back to the same AP but
4158 * skips the authentication flow, or if working with a driver that
4159 * does not support full AP client state.
4160 *
4161 * Skip this if the STA has already completed FT reassociation and the
4162 * TK has been configured since the TX/RX PN must not be reset to 0 for
4163 * the same key.
4164 *
4165 * FT-over-the-DS has a special case where the STA entry (and as such,
4166 * the TK) has not yet been configured to the driver depending on which
4167 * driver interface is used. For that case, allow add-STA operation to
4168 * be used (instead of set-STA). This is needed to allow mac80211-based
4169 * drivers to accept the STA parameter configuration. Since this is
4170 * after a new FT-over-DS exchange, a new TK has been derived, so key
4171 * reinstallation is not a concern for this case.
4172 */
4173 wpa_printf(MSG_DEBUG, "Add associated STA " MACSTR
4174 " (added_unassoc=%d auth_alg=%u ft_over_ds=%u reassoc=%d authorized=%d ft_tk=%d fils_tk=%d)",
4175 MAC2STR(sta->addr), sta->added_unassoc, sta->auth_alg,
4176 sta->ft_over_ds, reassoc,
4177 !!(sta->flags & WLAN_STA_AUTHORIZED),
4178 wpa_auth_sta_ft_tk_already_set(sta->wpa_sm),
4179 wpa_auth_sta_fils_tk_already_set(sta->wpa_sm));
4180
4181 if (!sta->added_unassoc &&
4182 (!(sta->flags & WLAN_STA_AUTHORIZED) ||
4183 (reassoc && sta->ft_over_ds && sta->auth_alg == WLAN_AUTH_FT) ||
4184 (!wpa_auth_sta_ft_tk_already_set(sta->wpa_sm) &&
4185 !wpa_auth_sta_fils_tk_already_set(sta->wpa_sm)))) {
4186 hostapd_drv_sta_remove(hapd, sta->addr);
4187 wpa_auth_sm_event(sta->wpa_sm, WPA_DRV_STA_REMOVED);
4188 set = 0;
4189
4190 /* Do not allow the FT-over-DS exception to be used more than
4191 * once per authentication exchange to guarantee a new TK is
4192 * used here */
4193 sta->ft_over_ds = 0;
4194 }
4195
4196 if (sta->flags & WLAN_STA_HT)
4197 hostapd_get_ht_capab(hapd, sta->ht_capabilities, &ht_cap);
4198 #ifdef CONFIG_IEEE80211AC
4199 if (sta->flags & WLAN_STA_VHT)
4200 hostapd_get_vht_capab(hapd, sta->vht_capabilities, &vht_cap);
4201 #endif /* CONFIG_IEEE80211AC */
4202 #ifdef CONFIG_IEEE80211AX
4203 if (sta->flags & WLAN_STA_HE) {
4204 hostapd_get_he_capab(hapd, sta->he_capab, &he_cap,
4205 sta->he_capab_len);
4206 }
4207 #endif /* CONFIG_IEEE80211AX */
4208 #ifdef CONFIG_IEEE80211BE
4209 if (sta->flags & WLAN_STA_EHT)
4210 hostapd_get_eht_capab(hapd, sta->eht_capab, &eht_cap,
4211 sta->eht_capab_len);
4212 #endif /* CONFIG_IEEE80211BE */
4213
4214 /*
4215 * Add the station with forced WLAN_STA_ASSOC flag. The sta->flags
4216 * will be set when the ACK frame for the (Re)Association Response frame
4217 * is processed (TX status driver event).
4218 */
4219 if (hostapd_sta_add(hapd, sta->addr, sta->aid, sta->capability,
4220 sta->supported_rates, sta->supported_rates_len,
4221 sta->listen_interval,
4222 sta->flags & WLAN_STA_HT ? &ht_cap : NULL,
4223 sta->flags & WLAN_STA_VHT ? &vht_cap : NULL,
4224 sta->flags & WLAN_STA_HE ? &he_cap : NULL,
4225 sta->flags & WLAN_STA_HE ? sta->he_capab_len : 0,
4226 sta->flags & WLAN_STA_EHT ? &eht_cap : NULL,
4227 sta->flags & WLAN_STA_EHT ? sta->eht_capab_len : 0,
4228 sta->he_6ghz_capab,
4229 sta->flags | WLAN_STA_ASSOC, sta->qosinfo,
4230 sta->vht_opmode, sta->p2p_ie ? 1 : 0,
4231 set)) {
4232 hostapd_logger(hapd, sta->addr,
4233 HOSTAPD_MODULE_IEEE80211, HOSTAPD_LEVEL_NOTICE,
4234 "Could not %s STA to kernel driver",
4235 set ? "set" : "add");
4236
4237 if (sta->added_unassoc) {
4238 hostapd_drv_sta_remove(hapd, sta->addr);
4239 sta->added_unassoc = 0;
4240 }
4241
4242 return -1;
4243 }
4244
4245 sta->added_unassoc = 0;
4246
4247 return 0;
4248 }
4249
4250
send_assoc_resp(struct hostapd_data * hapd,struct sta_info * sta,const u8 * addr,u16 status_code,int reassoc,const u8 * ies,size_t ies_len,int rssi,int omit_rsnxe)4251 static u16 send_assoc_resp(struct hostapd_data *hapd, struct sta_info *sta,
4252 const u8 *addr, u16 status_code, int reassoc,
4253 const u8 *ies, size_t ies_len, int rssi,
4254 int omit_rsnxe)
4255 {
4256 int send_len;
4257 u8 *buf;
4258 size_t buflen;
4259 struct ieee80211_mgmt *reply;
4260 u8 *p;
4261 u16 res = WLAN_STATUS_SUCCESS;
4262
4263 buflen = sizeof(struct ieee80211_mgmt) + 1024;
4264 #ifdef CONFIG_FILS
4265 if (sta && sta->fils_hlp_resp)
4266 buflen += wpabuf_len(sta->fils_hlp_resp);
4267 if (sta)
4268 buflen += 150;
4269 #endif /* CONFIG_FILS */
4270 #ifdef CONFIG_OWE
4271 if (sta && (hapd->conf->wpa_key_mgmt & WPA_KEY_MGMT_OWE))
4272 buflen += 150;
4273 #endif /* CONFIG_OWE */
4274 #ifdef CONFIG_DPP2
4275 if (sta && sta->dpp_pfs)
4276 buflen += 5 + sta->dpp_pfs->curve->prime_len;
4277 #endif /* CONFIG_DPP2 */
4278 #ifdef CONFIG_IEEE80211BE
4279 if (hapd->iconf->ieee80211be && !hapd->conf->disable_11be) {
4280 buflen += hostapd_eid_eht_capab_len(hapd, IEEE80211_MODE_AP);
4281 buflen += 3 + sizeof(struct ieee80211_eht_operation);
4282 if (hapd->iconf->punct_bitmap)
4283 buflen += EHT_OPER_DISABLED_SUBCHAN_BITMAP_SIZE;
4284 }
4285 #endif /* CONFIG_IEEE80211BE */
4286
4287 buf = os_zalloc(buflen);
4288 if (!buf) {
4289 res = WLAN_STATUS_UNSPECIFIED_FAILURE;
4290 goto done;
4291 }
4292 reply = (struct ieee80211_mgmt *) buf;
4293 reply->frame_control =
4294 IEEE80211_FC(WLAN_FC_TYPE_MGMT,
4295 (reassoc ? WLAN_FC_STYPE_REASSOC_RESP :
4296 WLAN_FC_STYPE_ASSOC_RESP));
4297 os_memcpy(reply->da, addr, ETH_ALEN);
4298 os_memcpy(reply->sa, hapd->own_addr, ETH_ALEN);
4299 os_memcpy(reply->bssid, hapd->own_addr, ETH_ALEN);
4300
4301 send_len = IEEE80211_HDRLEN;
4302 send_len += sizeof(reply->u.assoc_resp);
4303 reply->u.assoc_resp.capab_info =
4304 host_to_le16(hostapd_own_capab_info(hapd));
4305 reply->u.assoc_resp.status_code = host_to_le16(status_code);
4306
4307 reply->u.assoc_resp.aid = host_to_le16((sta ? sta->aid : 0) |
4308 BIT(14) | BIT(15));
4309 /* Supported rates */
4310 p = hostapd_eid_supp_rates(hapd, reply->u.assoc_resp.variable);
4311 /* Extended supported rates */
4312 p = hostapd_eid_ext_supp_rates(hapd, p);
4313
4314 /* Radio measurement capabilities */
4315 p = hostapd_eid_rm_enabled_capab(hapd, p, buf + buflen - p);
4316
4317 #ifdef CONFIG_MBO
4318 if (status_code == WLAN_STATUS_DENIED_POOR_CHANNEL_CONDITIONS &&
4319 rssi != 0) {
4320 int delta = hapd->iconf->rssi_reject_assoc_rssi - rssi;
4321
4322 p = hostapd_eid_mbo_rssi_assoc_rej(hapd, p, buf + buflen - p,
4323 delta);
4324 }
4325 #endif /* CONFIG_MBO */
4326
4327 #ifdef CONFIG_IEEE80211R_AP
4328 if (sta && status_code == WLAN_STATUS_SUCCESS) {
4329 /* IEEE 802.11r: Mobility Domain Information, Fast BSS
4330 * Transition Information, RSN, [RIC Response] */
4331 p = wpa_sm_write_assoc_resp_ies(sta->wpa_sm, p,
4332 buf + buflen - p,
4333 sta->auth_alg, ies, ies_len,
4334 omit_rsnxe);
4335 if (!p) {
4336 wpa_printf(MSG_DEBUG,
4337 "FT: Failed to write AssocResp IEs");
4338 res = WLAN_STATUS_UNSPECIFIED_FAILURE;
4339 goto done;
4340 }
4341 }
4342 #endif /* CONFIG_IEEE80211R_AP */
4343 #ifdef CONFIG_FILS
4344 if (sta && status_code == WLAN_STATUS_SUCCESS &&
4345 (sta->auth_alg == WLAN_AUTH_FILS_SK ||
4346 sta->auth_alg == WLAN_AUTH_FILS_SK_PFS ||
4347 sta->auth_alg == WLAN_AUTH_FILS_PK))
4348 p = wpa_auth_write_assoc_resp_fils(sta->wpa_sm, p,
4349 buf + buflen - p,
4350 ies, ies_len);
4351 #endif /* CONFIG_FILS */
4352
4353 #ifdef CONFIG_OWE
4354 if (sta && status_code == WLAN_STATUS_SUCCESS &&
4355 (hapd->conf->wpa_key_mgmt & WPA_KEY_MGMT_OWE))
4356 p = wpa_auth_write_assoc_resp_owe(sta->wpa_sm, p,
4357 buf + buflen - p,
4358 ies, ies_len);
4359 #endif /* CONFIG_OWE */
4360
4361 if (sta && status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY)
4362 p = hostapd_eid_assoc_comeback_time(hapd, sta, p);
4363
4364 p = hostapd_eid_ht_capabilities(hapd, p);
4365 p = hostapd_eid_ht_operation(hapd, p);
4366
4367 #ifdef CONFIG_IEEE80211AC
4368 if (hapd->iconf->ieee80211ac && !hapd->conf->disable_11ac &&
4369 !is_6ghz_op_class(hapd->iconf->op_class)) {
4370 u32 nsts = 0, sta_nsts;
4371
4372 if (sta && hapd->conf->use_sta_nsts && sta->vht_capabilities) {
4373 struct ieee80211_vht_capabilities *capa;
4374
4375 nsts = (hapd->iface->conf->vht_capab >>
4376 VHT_CAP_BEAMFORMEE_STS_OFFSET) & 7;
4377 capa = sta->vht_capabilities;
4378 sta_nsts = (le_to_host32(capa->vht_capabilities_info) >>
4379 VHT_CAP_BEAMFORMEE_STS_OFFSET) & 7;
4380
4381 if (nsts < sta_nsts)
4382 nsts = 0;
4383 else
4384 nsts = sta_nsts;
4385 }
4386 p = hostapd_eid_vht_capabilities(hapd, p, nsts);
4387 p = hostapd_eid_vht_operation(hapd, p);
4388 }
4389 #endif /* CONFIG_IEEE80211AC */
4390
4391 #ifdef CONFIG_IEEE80211AX
4392 if (hapd->iconf->ieee80211ax && !hapd->conf->disable_11ax) {
4393 p = hostapd_eid_he_capab(hapd, p, IEEE80211_MODE_AP);
4394 p = hostapd_eid_he_operation(hapd, p);
4395 p = hostapd_eid_cca(hapd, p);
4396 p = hostapd_eid_spatial_reuse(hapd, p);
4397 p = hostapd_eid_he_mu_edca_parameter_set(hapd, p);
4398 p = hostapd_eid_he_6ghz_band_cap(hapd, p);
4399 }
4400 #endif /* CONFIG_IEEE80211AX */
4401
4402 p = hostapd_eid_ext_capab(hapd, p, false);
4403 p = hostapd_eid_bss_max_idle_period(hapd, p);
4404 if (sta && sta->qos_map_enabled)
4405 p = hostapd_eid_qos_map_set(hapd, p);
4406
4407 #ifdef CONFIG_FST
4408 if (hapd->iface->fst_ies) {
4409 os_memcpy(p, wpabuf_head(hapd->iface->fst_ies),
4410 wpabuf_len(hapd->iface->fst_ies));
4411 p += wpabuf_len(hapd->iface->fst_ies);
4412 }
4413 #endif /* CONFIG_FST */
4414
4415 #ifdef CONFIG_TESTING_OPTIONS
4416 if (hapd->conf->rsnxe_override_ft &&
4417 buf + buflen - p >=
4418 (long int) wpabuf_len(hapd->conf->rsnxe_override_ft) &&
4419 sta && sta->auth_alg == WLAN_AUTH_FT) {
4420 wpa_printf(MSG_DEBUG, "TESTING: RSNXE FT override");
4421 os_memcpy(p, wpabuf_head(hapd->conf->rsnxe_override_ft),
4422 wpabuf_len(hapd->conf->rsnxe_override_ft));
4423 p += wpabuf_len(hapd->conf->rsnxe_override_ft);
4424 goto rsnxe_done;
4425 }
4426 #endif /* CONFIG_TESTING_OPTIONS */
4427 if (!omit_rsnxe)
4428 p = hostapd_eid_rsnxe(hapd, p, buf + buflen - p);
4429 #ifdef CONFIG_TESTING_OPTIONS
4430 rsnxe_done:
4431 #endif /* CONFIG_TESTING_OPTIONS */
4432
4433 #ifdef CONFIG_IEEE80211BE
4434 if (hapd->iconf->ieee80211be && !hapd->conf->disable_11be) {
4435 p = hostapd_eid_eht_capab(hapd, p, IEEE80211_MODE_AP);
4436 p = hostapd_eid_eht_operation(hapd, p);
4437 }
4438 #endif /* CONFIG_IEEE80211BE */
4439
4440 #ifdef CONFIG_OWE
4441 if ((hapd->conf->wpa_key_mgmt & WPA_KEY_MGMT_OWE) &&
4442 sta && sta->owe_ecdh && status_code == WLAN_STATUS_SUCCESS &&
4443 wpa_auth_sta_key_mgmt(sta->wpa_sm) == WPA_KEY_MGMT_OWE &&
4444 !wpa_auth_sta_get_pmksa(sta->wpa_sm)) {
4445 struct wpabuf *pub;
4446
4447 pub = crypto_ecdh_get_pubkey(sta->owe_ecdh, 0);
4448 if (!pub) {
4449 res = WLAN_STATUS_UNSPECIFIED_FAILURE;
4450 goto done;
4451 }
4452 /* OWE Diffie-Hellman Parameter element */
4453 *p++ = WLAN_EID_EXTENSION; /* Element ID */
4454 *p++ = 1 + 2 + wpabuf_len(pub); /* Length */
4455 *p++ = WLAN_EID_EXT_OWE_DH_PARAM; /* Element ID Extension */
4456 WPA_PUT_LE16(p, sta->owe_group);
4457 p += 2;
4458 os_memcpy(p, wpabuf_head(pub), wpabuf_len(pub));
4459 p += wpabuf_len(pub);
4460 wpabuf_free(pub);
4461 }
4462 #endif /* CONFIG_OWE */
4463
4464 #ifdef CONFIG_DPP2
4465 if (DPP_VERSION > 1 && (hapd->conf->wpa_key_mgmt & WPA_KEY_MGMT_DPP) &&
4466 sta && sta->dpp_pfs && status_code == WLAN_STATUS_SUCCESS &&
4467 wpa_auth_sta_key_mgmt(sta->wpa_sm) == WPA_KEY_MGMT_DPP) {
4468 os_memcpy(p, wpabuf_head(sta->dpp_pfs->ie),
4469 wpabuf_len(sta->dpp_pfs->ie));
4470 p += wpabuf_len(sta->dpp_pfs->ie);
4471 }
4472 #endif /* CONFIG_DPP2 */
4473
4474 #ifdef CONFIG_IEEE80211AC
4475 if (sta && hapd->conf->vendor_vht && (sta->flags & WLAN_STA_VENDOR_VHT))
4476 p = hostapd_eid_vendor_vht(hapd, p);
4477 #endif /* CONFIG_IEEE80211AC */
4478
4479 if (sta && (sta->flags & WLAN_STA_WMM))
4480 p = hostapd_eid_wmm(hapd, p);
4481
4482 #ifdef CONFIG_WPS
4483 if (sta &&
4484 ((sta->flags & WLAN_STA_WPS) ||
4485 ((sta->flags & WLAN_STA_MAYBE_WPS) && hapd->conf->wpa))) {
4486 struct wpabuf *wps = wps_build_assoc_resp_ie();
4487 if (wps) {
4488 os_memcpy(p, wpabuf_head(wps), wpabuf_len(wps));
4489 p += wpabuf_len(wps);
4490 wpabuf_free(wps);
4491 }
4492 }
4493 #endif /* CONFIG_WPS */
4494
4495 if (sta && (sta->flags & WLAN_STA_MULTI_AP))
4496 p = hostapd_eid_multi_ap(hapd, p);
4497
4498 #ifdef CONFIG_P2P
4499 if (sta && sta->p2p_ie && hapd->p2p_group) {
4500 struct wpabuf *p2p_resp_ie;
4501 enum p2p_status_code status;
4502 switch (status_code) {
4503 case WLAN_STATUS_SUCCESS:
4504 status = P2P_SC_SUCCESS;
4505 break;
4506 case WLAN_STATUS_AP_UNABLE_TO_HANDLE_NEW_STA:
4507 status = P2P_SC_FAIL_LIMIT_REACHED;
4508 break;
4509 default:
4510 status = P2P_SC_FAIL_INVALID_PARAMS;
4511 break;
4512 }
4513 p2p_resp_ie = p2p_group_assoc_resp_ie(hapd->p2p_group, status);
4514 if (p2p_resp_ie) {
4515 os_memcpy(p, wpabuf_head(p2p_resp_ie),
4516 wpabuf_len(p2p_resp_ie));
4517 p += wpabuf_len(p2p_resp_ie);
4518 wpabuf_free(p2p_resp_ie);
4519 }
4520 }
4521 #endif /* CONFIG_P2P */
4522
4523 #ifdef CONFIG_P2P_MANAGER
4524 if (hapd->conf->p2p & P2P_MANAGE)
4525 p = hostapd_eid_p2p_manage(hapd, p);
4526 #endif /* CONFIG_P2P_MANAGER */
4527
4528 p = hostapd_eid_mbo(hapd, p, buf + buflen - p);
4529
4530 if (hapd->conf->assocresp_elements &&
4531 (size_t) (buf + buflen - p) >=
4532 wpabuf_len(hapd->conf->assocresp_elements)) {
4533 os_memcpy(p, wpabuf_head(hapd->conf->assocresp_elements),
4534 wpabuf_len(hapd->conf->assocresp_elements));
4535 p += wpabuf_len(hapd->conf->assocresp_elements);
4536 }
4537
4538 send_len += p - reply->u.assoc_resp.variable;
4539
4540 #ifdef CONFIG_FILS
4541 if (sta &&
4542 (sta->auth_alg == WLAN_AUTH_FILS_SK ||
4543 sta->auth_alg == WLAN_AUTH_FILS_SK_PFS ||
4544 sta->auth_alg == WLAN_AUTH_FILS_PK) &&
4545 status_code == WLAN_STATUS_SUCCESS) {
4546 struct ieee802_11_elems elems;
4547
4548 if (ieee802_11_parse_elems(ies, ies_len, &elems, 0) ==
4549 ParseFailed || !elems.fils_session) {
4550 res = WLAN_STATUS_UNSPECIFIED_FAILURE;
4551 goto done;
4552 }
4553
4554 /* FILS Session */
4555 *p++ = WLAN_EID_EXTENSION; /* Element ID */
4556 *p++ = 1 + FILS_SESSION_LEN; /* Length */
4557 *p++ = WLAN_EID_EXT_FILS_SESSION; /* Element ID Extension */
4558 os_memcpy(p, elems.fils_session, FILS_SESSION_LEN);
4559 send_len += 2 + 1 + FILS_SESSION_LEN;
4560
4561 send_len = fils_encrypt_assoc(sta->wpa_sm, buf, send_len,
4562 buflen, sta->fils_hlp_resp);
4563 if (send_len < 0) {
4564 res = WLAN_STATUS_UNSPECIFIED_FAILURE;
4565 goto done;
4566 }
4567 }
4568 #endif /* CONFIG_FILS */
4569
4570 if (hostapd_drv_send_mlme(hapd, reply, send_len, 0, NULL, 0, 0) < 0) {
4571 wpa_printf(MSG_INFO, "Failed to send assoc resp: %s",
4572 strerror(errno));
4573 res = WLAN_STATUS_UNSPECIFIED_FAILURE;
4574 }
4575
4576 done:
4577 os_free(buf);
4578 return res;
4579 }
4580
4581
4582 #ifdef CONFIG_OWE
owe_assoc_req_process(struct hostapd_data * hapd,struct sta_info * sta,const u8 * owe_dh,u8 owe_dh_len,u8 * owe_buf,size_t owe_buf_len,u16 * status)4583 u8 * owe_assoc_req_process(struct hostapd_data *hapd, struct sta_info *sta,
4584 const u8 *owe_dh, u8 owe_dh_len,
4585 u8 *owe_buf, size_t owe_buf_len, u16 *status)
4586 {
4587 #ifdef CONFIG_TESTING_OPTIONS
4588 if (hapd->conf->own_ie_override) {
4589 wpa_printf(MSG_DEBUG, "OWE: Using IE override");
4590 *status = WLAN_STATUS_SUCCESS;
4591 return wpa_auth_write_assoc_resp_owe(sta->wpa_sm, owe_buf,
4592 owe_buf_len, NULL, 0);
4593 }
4594 #endif /* CONFIG_TESTING_OPTIONS */
4595
4596 if (wpa_auth_sta_get_pmksa(sta->wpa_sm)) {
4597 wpa_printf(MSG_DEBUG, "OWE: Using PMKSA caching");
4598 owe_buf = wpa_auth_write_assoc_resp_owe(sta->wpa_sm, owe_buf,
4599 owe_buf_len, NULL, 0);
4600 *status = WLAN_STATUS_SUCCESS;
4601 return owe_buf;
4602 }
4603
4604 if (sta->owe_pmk && sta->external_dh_updated) {
4605 wpa_printf(MSG_DEBUG, "OWE: Using previously derived PMK");
4606 *status = WLAN_STATUS_SUCCESS;
4607 return owe_buf;
4608 }
4609
4610 *status = owe_process_assoc_req(hapd, sta, owe_dh, owe_dh_len);
4611 if (*status != WLAN_STATUS_SUCCESS)
4612 return NULL;
4613
4614 owe_buf = wpa_auth_write_assoc_resp_owe(sta->wpa_sm, owe_buf,
4615 owe_buf_len, NULL, 0);
4616
4617 if (sta->owe_ecdh && owe_buf) {
4618 struct wpabuf *pub;
4619
4620 pub = crypto_ecdh_get_pubkey(sta->owe_ecdh, 0);
4621 if (!pub) {
4622 *status = WLAN_STATUS_UNSPECIFIED_FAILURE;
4623 return owe_buf;
4624 }
4625
4626 /* OWE Diffie-Hellman Parameter element */
4627 *owe_buf++ = WLAN_EID_EXTENSION; /* Element ID */
4628 *owe_buf++ = 1 + 2 + wpabuf_len(pub); /* Length */
4629 *owe_buf++ = WLAN_EID_EXT_OWE_DH_PARAM; /* Element ID Extension
4630 */
4631 WPA_PUT_LE16(owe_buf, sta->owe_group);
4632 owe_buf += 2;
4633 os_memcpy(owe_buf, wpabuf_head(pub), wpabuf_len(pub));
4634 owe_buf += wpabuf_len(pub);
4635 wpabuf_free(pub);
4636 }
4637
4638 return owe_buf;
4639 }
4640 #endif /* CONFIG_OWE */
4641
4642
4643 #ifdef CONFIG_FILS
4644
fils_hlp_finish_assoc(struct hostapd_data * hapd,struct sta_info * sta)4645 void fils_hlp_finish_assoc(struct hostapd_data *hapd, struct sta_info *sta)
4646 {
4647 u16 reply_res;
4648
4649 wpa_printf(MSG_DEBUG, "FILS: Finish association with " MACSTR,
4650 MAC2STR(sta->addr));
4651 eloop_cancel_timeout(fils_hlp_timeout, hapd, sta);
4652 if (!sta->fils_pending_assoc_req)
4653 return;
4654 reply_res = send_assoc_resp(hapd, sta, sta->addr, WLAN_STATUS_SUCCESS,
4655 sta->fils_pending_assoc_is_reassoc,
4656 sta->fils_pending_assoc_req,
4657 sta->fils_pending_assoc_req_len, 0, 0);
4658 os_free(sta->fils_pending_assoc_req);
4659 sta->fils_pending_assoc_req = NULL;
4660 sta->fils_pending_assoc_req_len = 0;
4661 wpabuf_free(sta->fils_hlp_resp);
4662 sta->fils_hlp_resp = NULL;
4663 wpabuf_free(sta->hlp_dhcp_discover);
4664 sta->hlp_dhcp_discover = NULL;
4665
4666 /*
4667 * Remove the station in case transmission of a success response fails.
4668 * At this point the station was already added associated to the driver.
4669 */
4670 if (reply_res != WLAN_STATUS_SUCCESS)
4671 hostapd_drv_sta_remove(hapd, sta->addr);
4672 }
4673
4674
fils_hlp_timeout(void * eloop_ctx,void * eloop_data)4675 void fils_hlp_timeout(void *eloop_ctx, void *eloop_data)
4676 {
4677 struct hostapd_data *hapd = eloop_ctx;
4678 struct sta_info *sta = eloop_data;
4679
4680 wpa_printf(MSG_DEBUG,
4681 "FILS: HLP response timeout - continue with association response for "
4682 MACSTR, MAC2STR(sta->addr));
4683 if (sta->fils_drv_assoc_finish)
4684 hostapd_notify_assoc_fils_finish(hapd, sta);
4685 else
4686 fils_hlp_finish_assoc(hapd, sta);
4687 }
4688
4689 #endif /* CONFIG_FILS */
4690
4691
handle_assoc(struct hostapd_data * hapd,const struct ieee80211_mgmt * mgmt,size_t len,int reassoc,int rssi)4692 static void handle_assoc(struct hostapd_data *hapd,
4693 const struct ieee80211_mgmt *mgmt, size_t len,
4694 int reassoc, int rssi)
4695 {
4696 u16 capab_info, listen_interval, seq_ctrl, fc;
4697 int resp = WLAN_STATUS_SUCCESS;
4698 u16 reply_res = WLAN_STATUS_UNSPECIFIED_FAILURE;
4699 const u8 *pos;
4700 int left, i;
4701 struct sta_info *sta;
4702 u8 *tmp = NULL;
4703 #ifdef CONFIG_FILS
4704 int delay_assoc = 0;
4705 #endif /* CONFIG_FILS */
4706 int omit_rsnxe = 0;
4707
4708 if (len < IEEE80211_HDRLEN + (reassoc ? sizeof(mgmt->u.reassoc_req) :
4709 sizeof(mgmt->u.assoc_req))) {
4710 wpa_printf(MSG_INFO, "handle_assoc(reassoc=%d) - too short payload (len=%lu)",
4711 reassoc, (unsigned long) len);
4712 return;
4713 }
4714
4715 #ifdef CONFIG_TESTING_OPTIONS
4716 if (reassoc) {
4717 if (hapd->iconf->ignore_reassoc_probability > 0.0 &&
4718 drand48() < hapd->iconf->ignore_reassoc_probability) {
4719 wpa_printf(MSG_INFO,
4720 "TESTING: ignoring reassoc request from "
4721 MACSTR, MAC2STR(mgmt->sa));
4722 return;
4723 }
4724 } else {
4725 if (hapd->iconf->ignore_assoc_probability > 0.0 &&
4726 drand48() < hapd->iconf->ignore_assoc_probability) {
4727 wpa_printf(MSG_INFO,
4728 "TESTING: ignoring assoc request from "
4729 MACSTR, MAC2STR(mgmt->sa));
4730 return;
4731 }
4732 }
4733 #endif /* CONFIG_TESTING_OPTIONS */
4734
4735 fc = le_to_host16(mgmt->frame_control);
4736 seq_ctrl = le_to_host16(mgmt->seq_ctrl);
4737
4738 if (reassoc) {
4739 capab_info = le_to_host16(mgmt->u.reassoc_req.capab_info);
4740 listen_interval = le_to_host16(
4741 mgmt->u.reassoc_req.listen_interval);
4742 wpa_printf(MSG_DEBUG, "reassociation request: STA=" MACSTR
4743 " capab_info=0x%02x listen_interval=%d current_ap="
4744 MACSTR " seq_ctrl=0x%x%s",
4745 MAC2STR(mgmt->sa), capab_info, listen_interval,
4746 MAC2STR(mgmt->u.reassoc_req.current_ap),
4747 seq_ctrl, (fc & WLAN_FC_RETRY) ? " retry" : "");
4748 left = len - (IEEE80211_HDRLEN + sizeof(mgmt->u.reassoc_req));
4749 pos = mgmt->u.reassoc_req.variable;
4750 } else {
4751 capab_info = le_to_host16(mgmt->u.assoc_req.capab_info);
4752 listen_interval = le_to_host16(
4753 mgmt->u.assoc_req.listen_interval);
4754 wpa_printf(MSG_DEBUG, "association request: STA=" MACSTR
4755 " capab_info=0x%02x listen_interval=%d "
4756 "seq_ctrl=0x%x%s",
4757 MAC2STR(mgmt->sa), capab_info, listen_interval,
4758 seq_ctrl, (fc & WLAN_FC_RETRY) ? " retry" : "");
4759 left = len - (IEEE80211_HDRLEN + sizeof(mgmt->u.assoc_req));
4760 pos = mgmt->u.assoc_req.variable;
4761 }
4762
4763 sta = ap_get_sta(hapd, mgmt->sa);
4764 #ifdef CONFIG_IEEE80211R_AP
4765 if (sta && sta->auth_alg == WLAN_AUTH_FT &&
4766 (sta->flags & WLAN_STA_AUTH) == 0) {
4767 wpa_printf(MSG_DEBUG, "FT: Allow STA " MACSTR " to associate "
4768 "prior to authentication since it is using "
4769 "over-the-DS FT", MAC2STR(mgmt->sa));
4770
4771 /*
4772 * Mark station as authenticated, to avoid adding station
4773 * entry in the driver as associated and not authenticated
4774 */
4775 sta->flags |= WLAN_STA_AUTH;
4776 } else
4777 #endif /* CONFIG_IEEE80211R_AP */
4778 if (sta == NULL || (sta->flags & WLAN_STA_AUTH) == 0) {
4779 if (hapd->iface->current_mode &&
4780 hapd->iface->current_mode->mode ==
4781 HOSTAPD_MODE_IEEE80211AD) {
4782 int acl_res;
4783 struct radius_sta info;
4784
4785 acl_res = ieee802_11_allowed_address(hapd, mgmt->sa,
4786 (const u8 *) mgmt,
4787 len, &info);
4788 if (acl_res == HOSTAPD_ACL_REJECT) {
4789 wpa_msg(hapd->msg_ctx, MSG_DEBUG,
4790 "Ignore Association Request frame from "
4791 MACSTR " due to ACL reject",
4792 MAC2STR(mgmt->sa));
4793 resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
4794 goto fail;
4795 }
4796 if (acl_res == HOSTAPD_ACL_PENDING)
4797 return;
4798
4799 /* DMG/IEEE 802.11ad does not use authentication.
4800 * Allocate sta entry upon association. */
4801 sta = ap_sta_add(hapd, mgmt->sa);
4802 if (!sta) {
4803 hostapd_logger(hapd, mgmt->sa,
4804 HOSTAPD_MODULE_IEEE80211,
4805 HOSTAPD_LEVEL_INFO,
4806 "Failed to add STA");
4807 resp = WLAN_STATUS_AP_UNABLE_TO_HANDLE_NEW_STA;
4808 goto fail;
4809 }
4810
4811 acl_res = ieee802_11_set_radius_info(
4812 hapd, sta, acl_res, &info);
4813 if (acl_res) {
4814 resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
4815 goto fail;
4816 }
4817
4818 hostapd_logger(hapd, sta->addr,
4819 HOSTAPD_MODULE_IEEE80211,
4820 HOSTAPD_LEVEL_DEBUG,
4821 "Skip authentication for DMG/IEEE 802.11ad");
4822 sta->flags |= WLAN_STA_AUTH;
4823 wpa_auth_sm_event(sta->wpa_sm, WPA_AUTH);
4824 sta->auth_alg = WLAN_AUTH_OPEN;
4825 } else {
4826 hostapd_logger(hapd, mgmt->sa,
4827 HOSTAPD_MODULE_IEEE80211,
4828 HOSTAPD_LEVEL_INFO,
4829 "Station tried to associate before authentication (aid=%d flags=0x%x)",
4830 sta ? sta->aid : -1,
4831 sta ? sta->flags : 0);
4832 send_deauth(hapd, mgmt->sa,
4833 WLAN_REASON_CLASS2_FRAME_FROM_NONAUTH_STA);
4834 return;
4835 }
4836 }
4837
4838 if ((fc & WLAN_FC_RETRY) &&
4839 sta->last_seq_ctrl != WLAN_INVALID_MGMT_SEQ &&
4840 sta->last_seq_ctrl == seq_ctrl &&
4841 sta->last_subtype == (reassoc ? WLAN_FC_STYPE_REASSOC_REQ :
4842 WLAN_FC_STYPE_ASSOC_REQ)) {
4843 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
4844 HOSTAPD_LEVEL_DEBUG,
4845 "Drop repeated association frame seq_ctrl=0x%x",
4846 seq_ctrl);
4847 return;
4848 }
4849 sta->last_seq_ctrl = seq_ctrl;
4850 sta->last_subtype = reassoc ? WLAN_FC_STYPE_REASSOC_REQ :
4851 WLAN_FC_STYPE_ASSOC_REQ;
4852
4853 if (hapd->tkip_countermeasures) {
4854 resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
4855 goto fail;
4856 }
4857
4858 if (listen_interval > hapd->conf->max_listen_interval) {
4859 hostapd_logger(hapd, mgmt->sa, HOSTAPD_MODULE_IEEE80211,
4860 HOSTAPD_LEVEL_DEBUG,
4861 "Too large Listen Interval (%d)",
4862 listen_interval);
4863 resp = WLAN_STATUS_ASSOC_DENIED_LISTEN_INT_TOO_LARGE;
4864 goto fail;
4865 }
4866
4867 #ifdef CONFIG_MBO
4868 if (hapd->conf->mbo_enabled && hapd->mbo_assoc_disallow) {
4869 resp = WLAN_STATUS_AP_UNABLE_TO_HANDLE_NEW_STA;
4870 goto fail;
4871 }
4872
4873 if (hapd->iconf->rssi_reject_assoc_rssi && rssi &&
4874 rssi < hapd->iconf->rssi_reject_assoc_rssi &&
4875 (sta->auth_rssi == 0 ||
4876 sta->auth_rssi < hapd->iconf->rssi_reject_assoc_rssi)) {
4877 resp = WLAN_STATUS_DENIED_POOR_CHANNEL_CONDITIONS;
4878 goto fail;
4879 }
4880 #endif /* CONFIG_MBO */
4881
4882 /*
4883 * sta->capability is used in check_assoc_ies() for RRM enabled
4884 * capability element.
4885 */
4886 sta->capability = capab_info;
4887
4888 #ifdef CONFIG_FILS
4889 if (sta->auth_alg == WLAN_AUTH_FILS_SK ||
4890 sta->auth_alg == WLAN_AUTH_FILS_SK_PFS ||
4891 sta->auth_alg == WLAN_AUTH_FILS_PK) {
4892 int res;
4893
4894 /* The end of the payload is encrypted. Need to decrypt it
4895 * before parsing. */
4896
4897 tmp = os_memdup(pos, left);
4898 if (!tmp) {
4899 resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
4900 goto fail;
4901 }
4902
4903 res = fils_decrypt_assoc(sta->wpa_sm, sta->fils_session, mgmt,
4904 len, tmp, left);
4905 if (res < 0) {
4906 resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
4907 goto fail;
4908 }
4909 pos = tmp;
4910 left = res;
4911 }
4912 #endif /* CONFIG_FILS */
4913
4914 /* followed by SSID and Supported rates; and HT capabilities if 802.11n
4915 * is used */
4916 resp = check_assoc_ies(hapd, sta, pos, left, reassoc);
4917 if (resp != WLAN_STATUS_SUCCESS)
4918 goto fail;
4919 omit_rsnxe = !get_ie(pos, left, WLAN_EID_RSNX);
4920
4921 if (hostapd_get_aid(hapd, sta) < 0) {
4922 hostapd_logger(hapd, mgmt->sa, HOSTAPD_MODULE_IEEE80211,
4923 HOSTAPD_LEVEL_INFO, "No room for more AIDs");
4924 resp = WLAN_STATUS_AP_UNABLE_TO_HANDLE_NEW_STA;
4925 goto fail;
4926 }
4927
4928 sta->listen_interval = listen_interval;
4929
4930 if (hapd->iface->current_mode &&
4931 hapd->iface->current_mode->mode == HOSTAPD_MODE_IEEE80211G)
4932 sta->flags |= WLAN_STA_NONERP;
4933 for (i = 0; i < sta->supported_rates_len; i++) {
4934 if ((sta->supported_rates[i] & 0x7f) > 22) {
4935 sta->flags &= ~WLAN_STA_NONERP;
4936 break;
4937 }
4938 }
4939 if (sta->flags & WLAN_STA_NONERP && !sta->nonerp_set) {
4940 sta->nonerp_set = 1;
4941 hapd->iface->num_sta_non_erp++;
4942 if (hapd->iface->num_sta_non_erp == 1)
4943 ieee802_11_set_beacons(hapd->iface);
4944 }
4945
4946 if (!(sta->capability & WLAN_CAPABILITY_SHORT_SLOT_TIME) &&
4947 !sta->no_short_slot_time_set) {
4948 sta->no_short_slot_time_set = 1;
4949 hapd->iface->num_sta_no_short_slot_time++;
4950 if (hapd->iface->current_mode &&
4951 hapd->iface->current_mode->mode ==
4952 HOSTAPD_MODE_IEEE80211G &&
4953 hapd->iface->num_sta_no_short_slot_time == 1)
4954 ieee802_11_set_beacons(hapd->iface);
4955 }
4956
4957 if (sta->capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
4958 sta->flags |= WLAN_STA_SHORT_PREAMBLE;
4959 else
4960 sta->flags &= ~WLAN_STA_SHORT_PREAMBLE;
4961
4962 if (!(sta->capability & WLAN_CAPABILITY_SHORT_PREAMBLE) &&
4963 !sta->no_short_preamble_set) {
4964 sta->no_short_preamble_set = 1;
4965 hapd->iface->num_sta_no_short_preamble++;
4966 if (hapd->iface->current_mode &&
4967 hapd->iface->current_mode->mode == HOSTAPD_MODE_IEEE80211G
4968 && hapd->iface->num_sta_no_short_preamble == 1)
4969 ieee802_11_set_beacons(hapd->iface);
4970 }
4971
4972 update_ht_state(hapd, sta);
4973
4974 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
4975 HOSTAPD_LEVEL_DEBUG,
4976 "association OK (aid %d)", sta->aid);
4977 /* Station will be marked associated, after it acknowledges AssocResp
4978 */
4979 sta->flags |= WLAN_STA_ASSOC_REQ_OK;
4980
4981 if ((sta->flags & WLAN_STA_MFP) && sta->sa_query_timed_out) {
4982 wpa_printf(MSG_DEBUG, "Allowing %sassociation after timed out "
4983 "SA Query procedure", reassoc ? "re" : "");
4984 /* TODO: Send a protected Disassociate frame to the STA using
4985 * the old key and Reason Code "Previous Authentication no
4986 * longer valid". Make sure this is only sent protected since
4987 * unprotected frame would be received by the STA that is now
4988 * trying to associate.
4989 */
4990 }
4991
4992 /* Make sure that the previously registered inactivity timer will not
4993 * remove the STA immediately. */
4994 sta->timeout_next = STA_NULLFUNC;
4995
4996 #ifdef CONFIG_TAXONOMY
4997 taxonomy_sta_info_assoc_req(hapd, sta, pos, left);
4998 #endif /* CONFIG_TAXONOMY */
4999
5000 sta->pending_wds_enable = 0;
5001
5002 #ifdef CONFIG_FILS
5003 if (sta->auth_alg == WLAN_AUTH_FILS_SK ||
5004 sta->auth_alg == WLAN_AUTH_FILS_SK_PFS ||
5005 sta->auth_alg == WLAN_AUTH_FILS_PK) {
5006 if (fils_process_hlp(hapd, sta, pos, left) > 0)
5007 delay_assoc = 1;
5008 }
5009 #endif /* CONFIG_FILS */
5010
5011 fail:
5012
5013 /*
5014 * In case of a successful response, add the station to the driver.
5015 * Otherwise, the kernel may ignore Data frames before we process the
5016 * ACK frame (TX status). In case of a failure, this station will be
5017 * removed.
5018 *
5019 * Note that this is not compliant with the IEEE 802.11 standard that
5020 * states that a non-AP station should transition into the
5021 * authenticated/associated state only after the station acknowledges
5022 * the (Re)Association Response frame. However, still do this as:
5023 *
5024 * 1. In case the station does not acknowledge the (Re)Association
5025 * Response frame, it will be removed.
5026 * 2. Data frames will be dropped in the kernel until the station is
5027 * set into authorized state, and there are no significant known
5028 * issues with processing other non-Data Class 3 frames during this
5029 * window.
5030 */
5031 if (resp == WLAN_STATUS_SUCCESS && sta &&
5032 add_associated_sta(hapd, sta, reassoc))
5033 resp = WLAN_STATUS_AP_UNABLE_TO_HANDLE_NEW_STA;
5034
5035 #ifdef CONFIG_FILS
5036 if (sta && delay_assoc && resp == WLAN_STATUS_SUCCESS &&
5037 eloop_is_timeout_registered(fils_hlp_timeout, hapd, sta) &&
5038 sta->fils_pending_assoc_req) {
5039 /* Do not reschedule fils_hlp_timeout in case the station
5040 * retransmits (Re)Association Request frame while waiting for
5041 * the previously started FILS HLP wait, so that the timeout can
5042 * be determined from the first pending attempt. */
5043 wpa_printf(MSG_DEBUG,
5044 "FILS: Continue waiting for HLP processing before sending (Re)Association Response frame to "
5045 MACSTR, MAC2STR(sta->addr));
5046 os_free(tmp);
5047 return;
5048 }
5049 if (sta) {
5050 eloop_cancel_timeout(fils_hlp_timeout, hapd, sta);
5051 os_free(sta->fils_pending_assoc_req);
5052 sta->fils_pending_assoc_req = NULL;
5053 sta->fils_pending_assoc_req_len = 0;
5054 wpabuf_free(sta->fils_hlp_resp);
5055 sta->fils_hlp_resp = NULL;
5056 }
5057 if (sta && delay_assoc && resp == WLAN_STATUS_SUCCESS) {
5058 sta->fils_pending_assoc_req = tmp;
5059 sta->fils_pending_assoc_req_len = left;
5060 sta->fils_pending_assoc_is_reassoc = reassoc;
5061 sta->fils_drv_assoc_finish = 0;
5062 wpa_printf(MSG_DEBUG,
5063 "FILS: Waiting for HLP processing before sending (Re)Association Response frame to "
5064 MACSTR, MAC2STR(sta->addr));
5065 eloop_cancel_timeout(fils_hlp_timeout, hapd, sta);
5066 eloop_register_timeout(0, hapd->conf->fils_hlp_wait_time * 1024,
5067 fils_hlp_timeout, hapd, sta);
5068 return;
5069 }
5070 #endif /* CONFIG_FILS */
5071
5072 if (resp >= 0)
5073 reply_res = send_assoc_resp(hapd, sta, mgmt->sa, resp, reassoc,
5074 pos, left, rssi, omit_rsnxe);
5075 os_free(tmp);
5076
5077 /*
5078 * Remove the station in case transmission of a success response fails
5079 * (the STA was added associated to the driver) or if the station was
5080 * previously added unassociated.
5081 */
5082 if (sta && ((reply_res != WLAN_STATUS_SUCCESS &&
5083 resp == WLAN_STATUS_SUCCESS) || sta->added_unassoc)) {
5084 hostapd_drv_sta_remove(hapd, sta->addr);
5085 sta->added_unassoc = 0;
5086 }
5087 }
5088
5089
handle_disassoc(struct hostapd_data * hapd,const struct ieee80211_mgmt * mgmt,size_t len)5090 static void handle_disassoc(struct hostapd_data *hapd,
5091 const struct ieee80211_mgmt *mgmt, size_t len)
5092 {
5093 struct sta_info *sta;
5094
5095 if (len < IEEE80211_HDRLEN + sizeof(mgmt->u.disassoc)) {
5096 wpa_printf(MSG_INFO, "handle_disassoc - too short payload (len=%lu)",
5097 (unsigned long) len);
5098 return;
5099 }
5100
5101 wpa_printf(MSG_DEBUG, "disassocation: STA=" MACSTR " reason_code=%d",
5102 MAC2STR(mgmt->sa),
5103 le_to_host16(mgmt->u.disassoc.reason_code));
5104
5105 sta = ap_get_sta(hapd, mgmt->sa);
5106 if (sta == NULL) {
5107 wpa_printf(MSG_INFO, "Station " MACSTR " trying to disassociate, but it is not associated",
5108 MAC2STR(mgmt->sa));
5109 return;
5110 }
5111
5112 ap_sta_set_authorized(hapd, sta, 0);
5113 sta->last_seq_ctrl = WLAN_INVALID_MGMT_SEQ;
5114 sta->flags &= ~(WLAN_STA_ASSOC | WLAN_STA_ASSOC_REQ_OK);
5115 hostapd_set_sta_flags(hapd, sta);
5116 wpa_auth_sm_event(sta->wpa_sm, WPA_DISASSOC);
5117 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
5118 HOSTAPD_LEVEL_INFO, "disassociated");
5119 sta->acct_terminate_cause = RADIUS_ACCT_TERMINATE_CAUSE_USER_REQUEST;
5120 ieee802_1x_notify_port_enabled(sta->eapol_sm, 0);
5121 /* Stop Accounting and IEEE 802.1X sessions, but leave the STA
5122 * authenticated. */
5123 accounting_sta_stop(hapd, sta);
5124 ieee802_1x_free_station(hapd, sta);
5125 if (sta->ipaddr)
5126 hostapd_drv_br_delete_ip_neigh(hapd, 4, (u8 *) &sta->ipaddr);
5127 ap_sta_ip6addr_del(hapd, sta);
5128 hostapd_drv_sta_remove(hapd, sta->addr);
5129 sta->added_unassoc = 0;
5130
5131 if (sta->timeout_next == STA_NULLFUNC ||
5132 sta->timeout_next == STA_DISASSOC) {
5133 sta->timeout_next = STA_DEAUTH;
5134 eloop_cancel_timeout(ap_handle_timer, hapd, sta);
5135 eloop_register_timeout(AP_DEAUTH_DELAY, 0, ap_handle_timer,
5136 hapd, sta);
5137 }
5138
5139 mlme_disassociate_indication(
5140 hapd, sta, le_to_host16(mgmt->u.disassoc.reason_code));
5141
5142 /* DMG/IEEE 802.11ad does not use deauthication. Deallocate sta upon
5143 * disassociation. */
5144 if (hapd->iface->current_mode &&
5145 hapd->iface->current_mode->mode == HOSTAPD_MODE_IEEE80211AD) {
5146 sta->flags &= ~WLAN_STA_AUTH;
5147 wpa_auth_sm_event(sta->wpa_sm, WPA_DEAUTH);
5148 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
5149 HOSTAPD_LEVEL_DEBUG, "deauthenticated");
5150 ap_free_sta(hapd, sta);
5151 }
5152 }
5153
5154
handle_deauth(struct hostapd_data * hapd,const struct ieee80211_mgmt * mgmt,size_t len)5155 static void handle_deauth(struct hostapd_data *hapd,
5156 const struct ieee80211_mgmt *mgmt, size_t len)
5157 {
5158 struct sta_info *sta;
5159
5160 if (len < IEEE80211_HDRLEN + sizeof(mgmt->u.deauth)) {
5161 wpa_msg(hapd->msg_ctx, MSG_DEBUG, "handle_deauth - too short "
5162 "payload (len=%lu)", (unsigned long) len);
5163 return;
5164 }
5165
5166 wpa_msg(hapd->msg_ctx, MSG_DEBUG, "deauthentication: STA=" MACSTR
5167 " reason_code=%d",
5168 MAC2STR(mgmt->sa), le_to_host16(mgmt->u.deauth.reason_code));
5169
5170 /* Clear the PTKSA cache entries for PASN */
5171 ptksa_cache_flush(hapd->ptksa, mgmt->sa, WPA_CIPHER_NONE);
5172
5173 sta = ap_get_sta(hapd, mgmt->sa);
5174 if (sta == NULL) {
5175 wpa_msg(hapd->msg_ctx, MSG_DEBUG, "Station " MACSTR " trying "
5176 "to deauthenticate, but it is not authenticated",
5177 MAC2STR(mgmt->sa));
5178 return;
5179 }
5180
5181 ap_sta_set_authorized(hapd, sta, 0);
5182 sta->last_seq_ctrl = WLAN_INVALID_MGMT_SEQ;
5183 sta->flags &= ~(WLAN_STA_AUTH | WLAN_STA_ASSOC |
5184 WLAN_STA_ASSOC_REQ_OK);
5185 hostapd_set_sta_flags(hapd, sta);
5186 wpa_auth_sm_event(sta->wpa_sm, WPA_DEAUTH);
5187 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
5188 HOSTAPD_LEVEL_DEBUG, "deauthenticated");
5189 mlme_deauthenticate_indication(
5190 hapd, sta, le_to_host16(mgmt->u.deauth.reason_code));
5191 sta->acct_terminate_cause = RADIUS_ACCT_TERMINATE_CAUSE_USER_REQUEST;
5192 ieee802_1x_notify_port_enabled(sta->eapol_sm, 0);
5193 ap_free_sta(hapd, sta);
5194 }
5195
5196
handle_beacon(struct hostapd_data * hapd,const struct ieee80211_mgmt * mgmt,size_t len,struct hostapd_frame_info * fi)5197 static void handle_beacon(struct hostapd_data *hapd,
5198 const struct ieee80211_mgmt *mgmt, size_t len,
5199 struct hostapd_frame_info *fi)
5200 {
5201 struct ieee802_11_elems elems;
5202
5203 if (len < IEEE80211_HDRLEN + sizeof(mgmt->u.beacon)) {
5204 wpa_printf(MSG_INFO, "handle_beacon - too short payload (len=%lu)",
5205 (unsigned long) len);
5206 return;
5207 }
5208
5209 (void) ieee802_11_parse_elems(mgmt->u.beacon.variable,
5210 len - (IEEE80211_HDRLEN +
5211 sizeof(mgmt->u.beacon)), &elems,
5212 0);
5213
5214 ap_list_process_beacon(hapd->iface, mgmt, &elems, fi);
5215 }
5216
5217
robust_action_frame(u8 category)5218 static int robust_action_frame(u8 category)
5219 {
5220 return category != WLAN_ACTION_PUBLIC &&
5221 category != WLAN_ACTION_HT;
5222 }
5223
5224
handle_action(struct hostapd_data * hapd,const struct ieee80211_mgmt * mgmt,size_t len,unsigned int freq)5225 static int handle_action(struct hostapd_data *hapd,
5226 const struct ieee80211_mgmt *mgmt, size_t len,
5227 unsigned int freq)
5228 {
5229 struct sta_info *sta;
5230 u8 *action __maybe_unused;
5231
5232 if (len < IEEE80211_HDRLEN + 2 + 1) {
5233 hostapd_logger(hapd, mgmt->sa, HOSTAPD_MODULE_IEEE80211,
5234 HOSTAPD_LEVEL_DEBUG,
5235 "handle_action - too short payload (len=%lu)",
5236 (unsigned long) len);
5237 return 0;
5238 }
5239
5240 action = (u8 *) &mgmt->u.action.u;
5241 wpa_printf(MSG_DEBUG, "RX_ACTION category %u action %u sa " MACSTR
5242 " da " MACSTR " len %d freq %u",
5243 mgmt->u.action.category, *action,
5244 MAC2STR(mgmt->sa), MAC2STR(mgmt->da), (int) len, freq);
5245
5246 sta = ap_get_sta(hapd, mgmt->sa);
5247
5248 if (mgmt->u.action.category != WLAN_ACTION_PUBLIC &&
5249 (sta == NULL || !(sta->flags & WLAN_STA_ASSOC))) {
5250 wpa_printf(MSG_DEBUG, "IEEE 802.11: Ignored Action "
5251 "frame (category=%u) from unassociated STA " MACSTR,
5252 mgmt->u.action.category, MAC2STR(mgmt->sa));
5253 return 0;
5254 }
5255
5256 if (sta && (sta->flags & WLAN_STA_MFP) &&
5257 !(mgmt->frame_control & host_to_le16(WLAN_FC_ISWEP)) &&
5258 robust_action_frame(mgmt->u.action.category)) {
5259 hostapd_logger(hapd, mgmt->sa, HOSTAPD_MODULE_IEEE80211,
5260 HOSTAPD_LEVEL_DEBUG,
5261 "Dropped unprotected Robust Action frame from "
5262 "an MFP STA");
5263 return 0;
5264 }
5265
5266 if (sta) {
5267 u16 fc = le_to_host16(mgmt->frame_control);
5268 u16 seq_ctrl = le_to_host16(mgmt->seq_ctrl);
5269
5270 if ((fc & WLAN_FC_RETRY) &&
5271 sta->last_seq_ctrl != WLAN_INVALID_MGMT_SEQ &&
5272 sta->last_seq_ctrl == seq_ctrl &&
5273 sta->last_subtype == WLAN_FC_STYPE_ACTION) {
5274 hostapd_logger(hapd, sta->addr,
5275 HOSTAPD_MODULE_IEEE80211,
5276 HOSTAPD_LEVEL_DEBUG,
5277 "Drop repeated action frame seq_ctrl=0x%x",
5278 seq_ctrl);
5279 return 1;
5280 }
5281
5282 sta->last_seq_ctrl = seq_ctrl;
5283 sta->last_subtype = WLAN_FC_STYPE_ACTION;
5284 }
5285
5286 switch (mgmt->u.action.category) {
5287 #ifdef CONFIG_IEEE80211R_AP
5288 case WLAN_ACTION_FT:
5289 if (!sta ||
5290 wpa_ft_action_rx(sta->wpa_sm, (u8 *) &mgmt->u.action,
5291 len - IEEE80211_HDRLEN))
5292 break;
5293 return 1;
5294 #endif /* CONFIG_IEEE80211R_AP */
5295 case WLAN_ACTION_WMM:
5296 hostapd_wmm_action(hapd, mgmt, len);
5297 return 1;
5298 case WLAN_ACTION_SA_QUERY:
5299 ieee802_11_sa_query_action(hapd, mgmt, len);
5300 return 1;
5301 #ifdef CONFIG_WNM_AP
5302 case WLAN_ACTION_WNM:
5303 ieee802_11_rx_wnm_action_ap(hapd, mgmt, len);
5304 return 1;
5305 #endif /* CONFIG_WNM_AP */
5306 #ifdef CONFIG_FST
5307 case WLAN_ACTION_FST:
5308 if (hapd->iface->fst)
5309 fst_rx_action(hapd->iface->fst, mgmt, len);
5310 else
5311 wpa_printf(MSG_DEBUG,
5312 "FST: Ignore FST Action frame - no FST attached");
5313 return 1;
5314 #endif /* CONFIG_FST */
5315 case WLAN_ACTION_PUBLIC:
5316 case WLAN_ACTION_PROTECTED_DUAL:
5317 if (len >= IEEE80211_HDRLEN + 2 &&
5318 mgmt->u.action.u.public_action.action ==
5319 WLAN_PA_20_40_BSS_COEX) {
5320 hostapd_2040_coex_action(hapd, mgmt, len);
5321 return 1;
5322 }
5323 #ifdef CONFIG_DPP
5324 if (len >= IEEE80211_HDRLEN + 6 &&
5325 mgmt->u.action.u.vs_public_action.action ==
5326 WLAN_PA_VENDOR_SPECIFIC &&
5327 WPA_GET_BE24(mgmt->u.action.u.vs_public_action.oui) ==
5328 OUI_WFA &&
5329 mgmt->u.action.u.vs_public_action.variable[0] ==
5330 DPP_OUI_TYPE) {
5331 const u8 *pos, *end;
5332
5333 pos = mgmt->u.action.u.vs_public_action.oui;
5334 end = ((const u8 *) mgmt) + len;
5335 hostapd_dpp_rx_action(hapd, mgmt->sa, pos, end - pos,
5336 freq);
5337 return 1;
5338 }
5339 if (len >= IEEE80211_HDRLEN + 2 &&
5340 (mgmt->u.action.u.public_action.action ==
5341 WLAN_PA_GAS_INITIAL_RESP ||
5342 mgmt->u.action.u.public_action.action ==
5343 WLAN_PA_GAS_COMEBACK_RESP)) {
5344 const u8 *pos, *end;
5345
5346 pos = &mgmt->u.action.u.public_action.action;
5347 end = ((const u8 *) mgmt) + len;
5348 if (gas_query_ap_rx(hapd->gas, mgmt->sa,
5349 mgmt->u.action.category,
5350 pos, end - pos, freq) == 0)
5351 return 1;
5352 }
5353 #endif /* CONFIG_DPP */
5354 if (hapd->public_action_cb) {
5355 hapd->public_action_cb(hapd->public_action_cb_ctx,
5356 (u8 *) mgmt, len, freq);
5357 }
5358 if (hapd->public_action_cb2) {
5359 hapd->public_action_cb2(hapd->public_action_cb2_ctx,
5360 (u8 *) mgmt, len, freq);
5361 }
5362 if (hapd->public_action_cb || hapd->public_action_cb2)
5363 return 1;
5364 break;
5365 case WLAN_ACTION_VENDOR_SPECIFIC:
5366 if (hapd->vendor_action_cb) {
5367 if (hapd->vendor_action_cb(hapd->vendor_action_cb_ctx,
5368 (u8 *) mgmt, len, freq) == 0)
5369 return 1;
5370 }
5371 break;
5372 case WLAN_ACTION_RADIO_MEASUREMENT:
5373 hostapd_handle_radio_measurement(hapd, (const u8 *) mgmt, len);
5374 return 1;
5375 }
5376
5377 hostapd_logger(hapd, mgmt->sa, HOSTAPD_MODULE_IEEE80211,
5378 HOSTAPD_LEVEL_DEBUG,
5379 "handle_action - unknown action category %d or invalid "
5380 "frame",
5381 mgmt->u.action.category);
5382 if (!is_multicast_ether_addr(mgmt->da) &&
5383 !(mgmt->u.action.category & 0x80) &&
5384 !is_multicast_ether_addr(mgmt->sa)) {
5385 struct ieee80211_mgmt *resp;
5386
5387 /*
5388 * IEEE 802.11-REVma/D9.0 - 7.3.1.11
5389 * Return the Action frame to the source without change
5390 * except that MSB of the Category set to 1.
5391 */
5392 wpa_printf(MSG_DEBUG, "IEEE 802.11: Return unknown Action "
5393 "frame back to sender");
5394 resp = os_memdup(mgmt, len);
5395 if (resp == NULL)
5396 return 0;
5397 os_memcpy(resp->da, resp->sa, ETH_ALEN);
5398 os_memcpy(resp->sa, hapd->own_addr, ETH_ALEN);
5399 os_memcpy(resp->bssid, hapd->own_addr, ETH_ALEN);
5400 resp->u.action.category |= 0x80;
5401
5402 if (hostapd_drv_send_mlme(hapd, resp, len, 0, NULL, 0, 0) < 0) {
5403 wpa_printf(MSG_ERROR, "IEEE 802.11: Failed to send "
5404 "Action frame");
5405 }
5406 os_free(resp);
5407 }
5408
5409 return 1;
5410 }
5411
5412
5413 /**
5414 * notify_mgmt_frame - Notify of Management frames on the control interface
5415 * @hapd: hostapd BSS data structure (the BSS to which the Management frame was
5416 * sent to)
5417 * @buf: Management frame data (starting from the IEEE 802.11 header)
5418 * @len: Length of frame data in octets
5419 *
5420 * Notify the control interface of any received Management frame.
5421 */
notify_mgmt_frame(struct hostapd_data * hapd,const u8 * buf,size_t len)5422 static void notify_mgmt_frame(struct hostapd_data *hapd, const u8 *buf,
5423 size_t len)
5424 {
5425
5426 int hex_len = len * 2 + 1;
5427 char *hex = os_malloc(hex_len);
5428
5429 if (hex) {
5430 wpa_snprintf_hex(hex, hex_len, buf, len);
5431 wpa_msg_ctrl(hapd->msg_ctx, MSG_INFO,
5432 AP_MGMT_FRAME_RECEIVED "buf=%s", hex);
5433 os_free(hex);
5434 }
5435 }
5436
5437
5438 /**
5439 * ieee802_11_mgmt - process incoming IEEE 802.11 management frames
5440 * @hapd: hostapd BSS data structure (the BSS to which the management frame was
5441 * sent to)
5442 * @buf: management frame data (starting from IEEE 802.11 header)
5443 * @len: length of frame data in octets
5444 * @fi: meta data about received frame (signal level, etc.)
5445 *
5446 * Process all incoming IEEE 802.11 management frames. This will be called for
5447 * each frame received from the kernel driver through wlan#ap interface. In
5448 * addition, it can be called to re-inserted pending frames (e.g., when using
5449 * external RADIUS server as an MAC ACL).
5450 */
ieee802_11_mgmt(struct hostapd_data * hapd,const u8 * buf,size_t len,struct hostapd_frame_info * fi)5451 int ieee802_11_mgmt(struct hostapd_data *hapd, const u8 *buf, size_t len,
5452 struct hostapd_frame_info *fi)
5453 {
5454 struct ieee80211_mgmt *mgmt;
5455 u16 fc, stype;
5456 int ret = 0;
5457 unsigned int freq;
5458 int ssi_signal = fi ? fi->ssi_signal : 0;
5459
5460 if (len < 24)
5461 return 0;
5462
5463 if (fi && fi->freq)
5464 freq = fi->freq;
5465 else
5466 freq = hapd->iface->freq;
5467
5468 mgmt = (struct ieee80211_mgmt *) buf;
5469 fc = le_to_host16(mgmt->frame_control);
5470 stype = WLAN_FC_GET_STYPE(fc);
5471
5472 if (is_multicast_ether_addr(mgmt->sa) ||
5473 is_zero_ether_addr(mgmt->sa) ||
5474 os_memcmp(mgmt->sa, hapd->own_addr, ETH_ALEN) == 0) {
5475 /* Do not process any frames with unexpected/invalid SA so that
5476 * we do not add any state for unexpected STA addresses or end
5477 * up sending out frames to unexpected destination. */
5478 wpa_printf(MSG_DEBUG, "MGMT: Invalid SA=" MACSTR
5479 " in received frame - ignore this frame silently",
5480 MAC2STR(mgmt->sa));
5481 return 0;
5482 }
5483
5484 if (stype == WLAN_FC_STYPE_BEACON) {
5485 handle_beacon(hapd, mgmt, len, fi);
5486 return 1;
5487 }
5488
5489 if (!is_broadcast_ether_addr(mgmt->bssid) &&
5490 #ifdef CONFIG_P2P
5491 /* Invitation responses can be sent with the peer MAC as BSSID */
5492 !((hapd->conf->p2p & P2P_GROUP_OWNER) &&
5493 stype == WLAN_FC_STYPE_ACTION) &&
5494 #endif /* CONFIG_P2P */
5495 #ifdef CONFIG_MESH
5496 !(hapd->conf->mesh & MESH_ENABLED) &&
5497 #endif /* CONFIG_MESH */
5498 os_memcmp(mgmt->bssid, hapd->own_addr, ETH_ALEN) != 0) {
5499 wpa_printf(MSG_INFO, "MGMT: BSSID=" MACSTR " not our address",
5500 MAC2STR(mgmt->bssid));
5501 return 0;
5502 }
5503
5504 if (hapd->iface->state != HAPD_IFACE_ENABLED) {
5505 wpa_printf(MSG_DEBUG, "MGMT: Ignore management frame while interface is not enabled (SA=" MACSTR " DA=" MACSTR " subtype=%u)",
5506 MAC2STR(mgmt->sa), MAC2STR(mgmt->da), stype);
5507 return 1;
5508 }
5509
5510 if (stype == WLAN_FC_STYPE_PROBE_REQ) {
5511 handle_probe_req(hapd, mgmt, len, ssi_signal);
5512 return 1;
5513 }
5514
5515 if ((!is_broadcast_ether_addr(mgmt->da) ||
5516 stype != WLAN_FC_STYPE_ACTION) &&
5517 os_memcmp(mgmt->da, hapd->own_addr, ETH_ALEN) != 0) {
5518 hostapd_logger(hapd, mgmt->sa, HOSTAPD_MODULE_IEEE80211,
5519 HOSTAPD_LEVEL_DEBUG,
5520 "MGMT: DA=" MACSTR " not our address",
5521 MAC2STR(mgmt->da));
5522 return 0;
5523 }
5524
5525 if (hapd->iconf->track_sta_max_num)
5526 sta_track_add(hapd->iface, mgmt->sa, ssi_signal);
5527
5528 if (hapd->conf->notify_mgmt_frames)
5529 notify_mgmt_frame(hapd, buf, len);
5530
5531 switch (stype) {
5532 case WLAN_FC_STYPE_AUTH:
5533 wpa_printf(MSG_DEBUG, "mgmt::auth");
5534 handle_auth(hapd, mgmt, len, ssi_signal, 0);
5535 ret = 1;
5536 break;
5537 case WLAN_FC_STYPE_ASSOC_REQ:
5538 wpa_printf(MSG_DEBUG, "mgmt::assoc_req");
5539 handle_assoc(hapd, mgmt, len, 0, ssi_signal);
5540 ret = 1;
5541 break;
5542 case WLAN_FC_STYPE_REASSOC_REQ:
5543 wpa_printf(MSG_DEBUG, "mgmt::reassoc_req");
5544 handle_assoc(hapd, mgmt, len, 1, ssi_signal);
5545 ret = 1;
5546 break;
5547 case WLAN_FC_STYPE_DISASSOC:
5548 wpa_printf(MSG_DEBUG, "mgmt::disassoc");
5549 handle_disassoc(hapd, mgmt, len);
5550 ret = 1;
5551 break;
5552 case WLAN_FC_STYPE_DEAUTH:
5553 wpa_msg(hapd->msg_ctx, MSG_DEBUG, "mgmt::deauth");
5554 handle_deauth(hapd, mgmt, len);
5555 ret = 1;
5556 break;
5557 case WLAN_FC_STYPE_ACTION:
5558 wpa_printf(MSG_DEBUG, "mgmt::action");
5559 ret = handle_action(hapd, mgmt, len, freq);
5560 break;
5561 default:
5562 hostapd_logger(hapd, mgmt->sa, HOSTAPD_MODULE_IEEE80211,
5563 HOSTAPD_LEVEL_DEBUG,
5564 "unknown mgmt frame subtype %d", stype);
5565 break;
5566 }
5567
5568 return ret;
5569 }
5570
5571
handle_auth_cb(struct hostapd_data * hapd,const struct ieee80211_mgmt * mgmt,size_t len,int ok)5572 static void handle_auth_cb(struct hostapd_data *hapd,
5573 const struct ieee80211_mgmt *mgmt,
5574 size_t len, int ok)
5575 {
5576 u16 auth_alg, auth_transaction, status_code;
5577 struct sta_info *sta;
5578 bool success_status;
5579
5580 sta = ap_get_sta(hapd, mgmt->da);
5581 if (!sta) {
5582 wpa_printf(MSG_DEBUG, "handle_auth_cb: STA " MACSTR
5583 " not found",
5584 MAC2STR(mgmt->da));
5585 return;
5586 }
5587
5588 if (len < IEEE80211_HDRLEN + sizeof(mgmt->u.auth)) {
5589 wpa_printf(MSG_INFO, "handle_auth_cb - too short payload (len=%lu)",
5590 (unsigned long) len);
5591 auth_alg = 0;
5592 auth_transaction = 0;
5593 status_code = WLAN_STATUS_UNSPECIFIED_FAILURE;
5594 goto fail;
5595 }
5596
5597 auth_alg = le_to_host16(mgmt->u.auth.auth_alg);
5598 auth_transaction = le_to_host16(mgmt->u.auth.auth_transaction);
5599 status_code = le_to_host16(mgmt->u.auth.status_code);
5600
5601 if (!ok) {
5602 hostapd_logger(hapd, mgmt->da, HOSTAPD_MODULE_IEEE80211,
5603 HOSTAPD_LEVEL_NOTICE,
5604 "did not acknowledge authentication response");
5605 goto fail;
5606 }
5607
5608 if (status_code == WLAN_STATUS_SUCCESS &&
5609 ((auth_alg == WLAN_AUTH_OPEN && auth_transaction == 2) ||
5610 (auth_alg == WLAN_AUTH_SHARED_KEY && auth_transaction == 4))) {
5611 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
5612 HOSTAPD_LEVEL_INFO, "authenticated");
5613 sta->flags |= WLAN_STA_AUTH;
5614 if (sta->added_unassoc)
5615 hostapd_set_sta_flags(hapd, sta);
5616 return;
5617 }
5618
5619 fail:
5620 success_status = status_code == WLAN_STATUS_SUCCESS;
5621 #ifdef CONFIG_SAE
5622 if (auth_alg == WLAN_AUTH_SAE && auth_transaction == 1)
5623 success_status = sae_status_success(hapd, status_code);
5624 #endif /* CONFIG_SAE */
5625 if (!success_status && sta->added_unassoc) {
5626 hostapd_drv_sta_remove(hapd, sta->addr);
5627 sta->added_unassoc = 0;
5628 }
5629 }
5630
5631
hostapd_set_wds_encryption(struct hostapd_data * hapd,struct sta_info * sta,char * ifname_wds)5632 static void hostapd_set_wds_encryption(struct hostapd_data *hapd,
5633 struct sta_info *sta,
5634 char *ifname_wds)
5635 {
5636 #ifdef CONFIG_WEP
5637 int i;
5638 struct hostapd_ssid *ssid = &hapd->conf->ssid;
5639
5640 if (hapd->conf->ieee802_1x || hapd->conf->wpa)
5641 return;
5642
5643 for (i = 0; i < 4; i++) {
5644 if (ssid->wep.key[i] &&
5645 hostapd_drv_set_key(ifname_wds, hapd, WPA_ALG_WEP, NULL, i,
5646 0, i == ssid->wep.idx, NULL, 0,
5647 ssid->wep.key[i], ssid->wep.len[i],
5648 i == ssid->wep.idx ?
5649 KEY_FLAG_GROUP_RX_TX_DEFAULT :
5650 KEY_FLAG_GROUP_RX_TX)) {
5651 wpa_printf(MSG_WARNING,
5652 "Could not set WEP keys for WDS interface; %s",
5653 ifname_wds);
5654 break;
5655 }
5656 }
5657 #endif /* CONFIG_WEP */
5658 }
5659
5660
handle_assoc_cb(struct hostapd_data * hapd,const struct ieee80211_mgmt * mgmt,size_t len,int reassoc,int ok)5661 static void handle_assoc_cb(struct hostapd_data *hapd,
5662 const struct ieee80211_mgmt *mgmt,
5663 size_t len, int reassoc, int ok)
5664 {
5665 u16 status;
5666 struct sta_info *sta;
5667 int new_assoc = 1;
5668
5669 sta = ap_get_sta(hapd, mgmt->da);
5670 if (!sta) {
5671 wpa_printf(MSG_INFO, "handle_assoc_cb: STA " MACSTR " not found",
5672 MAC2STR(mgmt->da));
5673 return;
5674 }
5675
5676 if (len < IEEE80211_HDRLEN + (reassoc ? sizeof(mgmt->u.reassoc_resp) :
5677 sizeof(mgmt->u.assoc_resp))) {
5678 wpa_printf(MSG_INFO,
5679 "handle_assoc_cb(reassoc=%d) - too short payload (len=%lu)",
5680 reassoc, (unsigned long) len);
5681 hostapd_drv_sta_remove(hapd, sta->addr);
5682 return;
5683 }
5684
5685 if (reassoc)
5686 status = le_to_host16(mgmt->u.reassoc_resp.status_code);
5687 else
5688 status = le_to_host16(mgmt->u.assoc_resp.status_code);
5689
5690 if (!ok) {
5691 hostapd_logger(hapd, mgmt->da, HOSTAPD_MODULE_IEEE80211,
5692 HOSTAPD_LEVEL_DEBUG,
5693 "did not acknowledge association response");
5694 sta->flags &= ~WLAN_STA_ASSOC_REQ_OK;
5695 /* The STA is added only in case of SUCCESS */
5696 if (status == WLAN_STATUS_SUCCESS)
5697 hostapd_drv_sta_remove(hapd, sta->addr);
5698
5699 return;
5700 }
5701
5702 if (status != WLAN_STATUS_SUCCESS)
5703 return;
5704
5705 /* Stop previous accounting session, if one is started, and allocate
5706 * new session id for the new session. */
5707 accounting_sta_stop(hapd, sta);
5708
5709 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
5710 HOSTAPD_LEVEL_INFO,
5711 "associated (aid %d)",
5712 sta->aid);
5713
5714 if (sta->flags & WLAN_STA_ASSOC)
5715 new_assoc = 0;
5716 sta->flags |= WLAN_STA_ASSOC;
5717 sta->flags &= ~WLAN_STA_WNM_SLEEP_MODE;
5718 if ((!hapd->conf->ieee802_1x && !hapd->conf->wpa &&
5719 !hapd->conf->osen) ||
5720 sta->auth_alg == WLAN_AUTH_FILS_SK ||
5721 sta->auth_alg == WLAN_AUTH_FILS_SK_PFS ||
5722 sta->auth_alg == WLAN_AUTH_FILS_PK ||
5723 sta->auth_alg == WLAN_AUTH_FT) {
5724 /*
5725 * Open, static WEP, FT protocol, or FILS; no separate
5726 * authorization step.
5727 */
5728 ap_sta_set_authorized(hapd, sta, 1);
5729 }
5730
5731 if (reassoc)
5732 mlme_reassociate_indication(hapd, sta);
5733 else
5734 mlme_associate_indication(hapd, sta);
5735
5736 sta->sa_query_timed_out = 0;
5737
5738 if (sta->eapol_sm == NULL) {
5739 /*
5740 * This STA does not use RADIUS server for EAP authentication,
5741 * so bind it to the selected VLAN interface now, since the
5742 * interface selection is not going to change anymore.
5743 */
5744 if (ap_sta_bind_vlan(hapd, sta) < 0)
5745 return;
5746 } else if (sta->vlan_id) {
5747 /* VLAN ID already set (e.g., by PMKSA caching), so bind STA */
5748 if (ap_sta_bind_vlan(hapd, sta) < 0)
5749 return;
5750 }
5751
5752 hostapd_set_sta_flags(hapd, sta);
5753
5754 if (!(sta->flags & WLAN_STA_WDS) && sta->pending_wds_enable) {
5755 wpa_printf(MSG_DEBUG, "Enable 4-address WDS mode for STA "
5756 MACSTR " based on pending request",
5757 MAC2STR(sta->addr));
5758 sta->pending_wds_enable = 0;
5759 sta->flags |= WLAN_STA_WDS;
5760 }
5761
5762 /* WPS not supported on backhaul BSS. Disable 4addr mode on fronthaul */
5763 if ((sta->flags & WLAN_STA_WDS) ||
5764 (sta->flags & WLAN_STA_MULTI_AP &&
5765 !(hapd->conf->multi_ap & FRONTHAUL_BSS) &&
5766 !(sta->flags & WLAN_STA_WPS))) {
5767 int ret;
5768 char ifname_wds[IFNAMSIZ + 1];
5769
5770 wpa_printf(MSG_DEBUG, "Reenable 4-address WDS mode for STA "
5771 MACSTR " (aid %u)",
5772 MAC2STR(sta->addr), sta->aid);
5773 ret = hostapd_set_wds_sta(hapd, ifname_wds, sta->addr,
5774 sta->aid, 1);
5775 if (!ret)
5776 hostapd_set_wds_encryption(hapd, sta, ifname_wds);
5777 }
5778
5779 if (sta->auth_alg == WLAN_AUTH_FT)
5780 wpa_auth_sm_event(sta->wpa_sm, WPA_ASSOC_FT);
5781 else
5782 wpa_auth_sm_event(sta->wpa_sm, WPA_ASSOC);
5783 hapd->new_assoc_sta_cb(hapd, sta, !new_assoc);
5784 ieee802_1x_notify_port_enabled(sta->eapol_sm, 1);
5785
5786 #ifdef CONFIG_FILS
5787 if ((sta->auth_alg == WLAN_AUTH_FILS_SK ||
5788 sta->auth_alg == WLAN_AUTH_FILS_SK_PFS ||
5789 sta->auth_alg == WLAN_AUTH_FILS_PK) &&
5790 fils_set_tk(sta->wpa_sm) < 0) {
5791 wpa_printf(MSG_DEBUG, "FILS: TK configuration failed");
5792 ap_sta_disconnect(hapd, sta, sta->addr,
5793 WLAN_REASON_UNSPECIFIED);
5794 return;
5795 }
5796 #endif /* CONFIG_FILS */
5797
5798 if (sta->pending_eapol_rx) {
5799 struct os_reltime now, age;
5800
5801 os_get_reltime(&now);
5802 os_reltime_sub(&now, &sta->pending_eapol_rx->rx_time, &age);
5803 if (age.sec == 0 && age.usec < 200000) {
5804 wpa_printf(MSG_DEBUG,
5805 "Process pending EAPOL frame that was received from " MACSTR " just before association notification",
5806 MAC2STR(sta->addr));
5807 ieee802_1x_receive(
5808 hapd, mgmt->da,
5809 wpabuf_head(sta->pending_eapol_rx->buf),
5810 wpabuf_len(sta->pending_eapol_rx->buf),
5811 sta->pending_eapol_rx->encrypted);
5812 }
5813 wpabuf_free(sta->pending_eapol_rx->buf);
5814 os_free(sta->pending_eapol_rx);
5815 sta->pending_eapol_rx = NULL;
5816 }
5817 }
5818
5819
handle_deauth_cb(struct hostapd_data * hapd,const struct ieee80211_mgmt * mgmt,size_t len,int ok)5820 static void handle_deauth_cb(struct hostapd_data *hapd,
5821 const struct ieee80211_mgmt *mgmt,
5822 size_t len, int ok)
5823 {
5824 struct sta_info *sta;
5825 if (is_multicast_ether_addr(mgmt->da))
5826 return;
5827 sta = ap_get_sta(hapd, mgmt->da);
5828 if (!sta) {
5829 wpa_printf(MSG_DEBUG, "handle_deauth_cb: STA " MACSTR
5830 " not found", MAC2STR(mgmt->da));
5831 return;
5832 }
5833 if (ok)
5834 wpa_printf(MSG_DEBUG, "STA " MACSTR " acknowledged deauth",
5835 MAC2STR(sta->addr));
5836 else
5837 wpa_printf(MSG_DEBUG, "STA " MACSTR " did not acknowledge "
5838 "deauth", MAC2STR(sta->addr));
5839
5840 ap_sta_deauth_cb(hapd, sta);
5841 }
5842
5843
handle_disassoc_cb(struct hostapd_data * hapd,const struct ieee80211_mgmt * mgmt,size_t len,int ok)5844 static void handle_disassoc_cb(struct hostapd_data *hapd,
5845 const struct ieee80211_mgmt *mgmt,
5846 size_t len, int ok)
5847 {
5848 struct sta_info *sta;
5849 if (is_multicast_ether_addr(mgmt->da))
5850 return;
5851 sta = ap_get_sta(hapd, mgmt->da);
5852 if (!sta) {
5853 wpa_printf(MSG_DEBUG, "handle_disassoc_cb: STA " MACSTR
5854 " not found", MAC2STR(mgmt->da));
5855 return;
5856 }
5857 if (ok)
5858 wpa_printf(MSG_DEBUG, "STA " MACSTR " acknowledged disassoc",
5859 MAC2STR(sta->addr));
5860 else
5861 wpa_printf(MSG_DEBUG, "STA " MACSTR " did not acknowledge "
5862 "disassoc", MAC2STR(sta->addr));
5863
5864 ap_sta_disassoc_cb(hapd, sta);
5865 }
5866
5867
handle_action_cb(struct hostapd_data * hapd,const struct ieee80211_mgmt * mgmt,size_t len,int ok)5868 static void handle_action_cb(struct hostapd_data *hapd,
5869 const struct ieee80211_mgmt *mgmt,
5870 size_t len, int ok)
5871 {
5872 struct sta_info *sta;
5873 const struct rrm_measurement_report_element *report;
5874
5875 #ifdef CONFIG_DPP
5876 if (len >= IEEE80211_HDRLEN + 6 &&
5877 mgmt->u.action.category == WLAN_ACTION_PUBLIC &&
5878 mgmt->u.action.u.vs_public_action.action ==
5879 WLAN_PA_VENDOR_SPECIFIC &&
5880 WPA_GET_BE24(mgmt->u.action.u.vs_public_action.oui) ==
5881 OUI_WFA &&
5882 mgmt->u.action.u.vs_public_action.variable[0] ==
5883 DPP_OUI_TYPE) {
5884 const u8 *pos, *end;
5885
5886 pos = &mgmt->u.action.u.vs_public_action.variable[1];
5887 end = ((const u8 *) mgmt) + len;
5888 hostapd_dpp_tx_status(hapd, mgmt->da, pos, end - pos, ok);
5889 return;
5890 }
5891 if (len >= IEEE80211_HDRLEN + 2 &&
5892 mgmt->u.action.category == WLAN_ACTION_PUBLIC &&
5893 (mgmt->u.action.u.public_action.action ==
5894 WLAN_PA_GAS_INITIAL_REQ ||
5895 mgmt->u.action.u.public_action.action ==
5896 WLAN_PA_GAS_COMEBACK_REQ)) {
5897 const u8 *pos, *end;
5898
5899 pos = mgmt->u.action.u.public_action.variable;
5900 end = ((const u8 *) mgmt) + len;
5901 gas_query_ap_tx_status(hapd->gas, mgmt->da, pos, end - pos, ok);
5902 return;
5903 }
5904 #endif /* CONFIG_DPP */
5905 if (is_multicast_ether_addr(mgmt->da))
5906 return;
5907 sta = ap_get_sta(hapd, mgmt->da);
5908 if (!sta) {
5909 wpa_printf(MSG_DEBUG, "handle_action_cb: STA " MACSTR
5910 " not found", MAC2STR(mgmt->da));
5911 return;
5912 }
5913
5914 #ifdef CONFIG_HS20
5915 if (ok && len >= IEEE80211_HDRLEN + 2 &&
5916 mgmt->u.action.category == WLAN_ACTION_WNM &&
5917 mgmt->u.action.u.vs_public_action.action == WNM_NOTIFICATION_REQ &&
5918 sta->hs20_deauth_on_ack) {
5919 wpa_printf(MSG_DEBUG, "HS 2.0: Deauthenticate STA " MACSTR
5920 " on acknowledging the WNM-Notification",
5921 MAC2STR(sta->addr));
5922 ap_sta_session_timeout(hapd, sta, 0);
5923 return;
5924 }
5925 #endif /* CONFIG_HS20 */
5926
5927 if (len < 24 + 5 + sizeof(*report))
5928 return;
5929 report = (const struct rrm_measurement_report_element *)
5930 &mgmt->u.action.u.rrm.variable[2];
5931 if (mgmt->u.action.category == WLAN_ACTION_RADIO_MEASUREMENT &&
5932 mgmt->u.action.u.rrm.action == WLAN_RRM_RADIO_MEASUREMENT_REQUEST &&
5933 report->eid == WLAN_EID_MEASURE_REQUEST &&
5934 report->len >= 3 &&
5935 report->type == MEASURE_TYPE_BEACON)
5936 hostapd_rrm_beacon_req_tx_status(hapd, mgmt, len, ok);
5937 }
5938
5939
5940 /**
5941 * ieee802_11_mgmt_cb - Process management frame TX status callback
5942 * @hapd: hostapd BSS data structure (the BSS from which the management frame
5943 * was sent from)
5944 * @buf: management frame data (starting from IEEE 802.11 header)
5945 * @len: length of frame data in octets
5946 * @stype: management frame subtype from frame control field
5947 * @ok: Whether the frame was ACK'ed
5948 */
ieee802_11_mgmt_cb(struct hostapd_data * hapd,const u8 * buf,size_t len,u16 stype,int ok)5949 void ieee802_11_mgmt_cb(struct hostapd_data *hapd, const u8 *buf, size_t len,
5950 u16 stype, int ok)
5951 {
5952 const struct ieee80211_mgmt *mgmt;
5953 mgmt = (const struct ieee80211_mgmt *) buf;
5954
5955 #ifdef CONFIG_TESTING_OPTIONS
5956 if (hapd->ext_mgmt_frame_handling) {
5957 size_t hex_len = 2 * len + 1;
5958 char *hex = os_malloc(hex_len);
5959
5960 if (hex) {
5961 wpa_snprintf_hex(hex, hex_len, buf, len);
5962 wpa_msg(hapd->msg_ctx, MSG_INFO,
5963 "MGMT-TX-STATUS stype=%u ok=%d buf=%s",
5964 stype, ok, hex);
5965 os_free(hex);
5966 }
5967 return;
5968 }
5969 #endif /* CONFIG_TESTING_OPTIONS */
5970
5971 switch (stype) {
5972 case WLAN_FC_STYPE_AUTH:
5973 wpa_printf(MSG_DEBUG, "mgmt::auth cb");
5974 handle_auth_cb(hapd, mgmt, len, ok);
5975 break;
5976 case WLAN_FC_STYPE_ASSOC_RESP:
5977 wpa_printf(MSG_DEBUG, "mgmt::assoc_resp cb");
5978 handle_assoc_cb(hapd, mgmt, len, 0, ok);
5979 break;
5980 case WLAN_FC_STYPE_REASSOC_RESP:
5981 wpa_printf(MSG_DEBUG, "mgmt::reassoc_resp cb");
5982 handle_assoc_cb(hapd, mgmt, len, 1, ok);
5983 break;
5984 case WLAN_FC_STYPE_PROBE_RESP:
5985 wpa_printf(MSG_EXCESSIVE, "mgmt::proberesp cb ok=%d", ok);
5986 break;
5987 case WLAN_FC_STYPE_DEAUTH:
5988 wpa_printf(MSG_DEBUG, "mgmt::deauth cb");
5989 handle_deauth_cb(hapd, mgmt, len, ok);
5990 break;
5991 case WLAN_FC_STYPE_DISASSOC:
5992 wpa_printf(MSG_DEBUG, "mgmt::disassoc cb");
5993 handle_disassoc_cb(hapd, mgmt, len, ok);
5994 break;
5995 case WLAN_FC_STYPE_ACTION:
5996 wpa_printf(MSG_DEBUG, "mgmt::action cb ok=%d", ok);
5997 handle_action_cb(hapd, mgmt, len, ok);
5998 break;
5999 default:
6000 wpa_printf(MSG_INFO, "unknown mgmt cb frame subtype %d", stype);
6001 break;
6002 }
6003 }
6004
6005
ieee802_11_get_mib(struct hostapd_data * hapd,char * buf,size_t buflen)6006 int ieee802_11_get_mib(struct hostapd_data *hapd, char *buf, size_t buflen)
6007 {
6008 /* TODO */
6009 return 0;
6010 }
6011
6012
ieee802_11_get_mib_sta(struct hostapd_data * hapd,struct sta_info * sta,char * buf,size_t buflen)6013 int ieee802_11_get_mib_sta(struct hostapd_data *hapd, struct sta_info *sta,
6014 char *buf, size_t buflen)
6015 {
6016 /* TODO */
6017 return 0;
6018 }
6019
6020
hostapd_tx_status(struct hostapd_data * hapd,const u8 * addr,const u8 * buf,size_t len,int ack)6021 void hostapd_tx_status(struct hostapd_data *hapd, const u8 *addr,
6022 const u8 *buf, size_t len, int ack)
6023 {
6024 struct sta_info *sta;
6025 struct hostapd_iface *iface = hapd->iface;
6026
6027 sta = ap_get_sta(hapd, addr);
6028 if (sta == NULL && iface->num_bss > 1) {
6029 size_t j;
6030 for (j = 0; j < iface->num_bss; j++) {
6031 hapd = iface->bss[j];
6032 sta = ap_get_sta(hapd, addr);
6033 if (sta)
6034 break;
6035 }
6036 }
6037 if (sta == NULL || !(sta->flags & WLAN_STA_ASSOC))
6038 return;
6039 if (sta->flags & WLAN_STA_PENDING_POLL) {
6040 wpa_printf(MSG_DEBUG, "STA " MACSTR " %s pending "
6041 "activity poll", MAC2STR(sta->addr),
6042 ack ? "ACKed" : "did not ACK");
6043 if (ack)
6044 sta->flags &= ~WLAN_STA_PENDING_POLL;
6045 }
6046
6047 ieee802_1x_tx_status(hapd, sta, buf, len, ack);
6048 }
6049
6050
hostapd_eapol_tx_status(struct hostapd_data * hapd,const u8 * dst,const u8 * data,size_t len,int ack)6051 void hostapd_eapol_tx_status(struct hostapd_data *hapd, const u8 *dst,
6052 const u8 *data, size_t len, int ack)
6053 {
6054 struct sta_info *sta;
6055 struct hostapd_iface *iface = hapd->iface;
6056
6057 sta = ap_get_sta(hapd, dst);
6058 if (sta == NULL && iface->num_bss > 1) {
6059 size_t j;
6060 for (j = 0; j < iface->num_bss; j++) {
6061 hapd = iface->bss[j];
6062 sta = ap_get_sta(hapd, dst);
6063 if (sta)
6064 break;
6065 }
6066 }
6067 if (sta == NULL || !(sta->flags & WLAN_STA_ASSOC)) {
6068 wpa_printf(MSG_DEBUG, "Ignore TX status for Data frame to STA "
6069 MACSTR " that is not currently associated",
6070 MAC2STR(dst));
6071 return;
6072 }
6073
6074 ieee802_1x_eapol_tx_status(hapd, sta, data, len, ack);
6075 }
6076
6077
hostapd_client_poll_ok(struct hostapd_data * hapd,const u8 * addr)6078 void hostapd_client_poll_ok(struct hostapd_data *hapd, const u8 *addr)
6079 {
6080 struct sta_info *sta;
6081 struct hostapd_iface *iface = hapd->iface;
6082
6083 sta = ap_get_sta(hapd, addr);
6084 if (sta == NULL && iface->num_bss > 1) {
6085 size_t j;
6086 for (j = 0; j < iface->num_bss; j++) {
6087 hapd = iface->bss[j];
6088 sta = ap_get_sta(hapd, addr);
6089 if (sta)
6090 break;
6091 }
6092 }
6093 if (sta == NULL)
6094 return;
6095 wpa_msg(hapd->msg_ctx, MSG_INFO, AP_STA_POLL_OK MACSTR,
6096 MAC2STR(sta->addr));
6097 if (!(sta->flags & WLAN_STA_PENDING_POLL))
6098 return;
6099
6100 wpa_printf(MSG_DEBUG, "STA " MACSTR " ACKed pending "
6101 "activity poll", MAC2STR(sta->addr));
6102 sta->flags &= ~WLAN_STA_PENDING_POLL;
6103 }
6104
6105
ieee802_11_rx_from_unknown(struct hostapd_data * hapd,const u8 * src,int wds)6106 void ieee802_11_rx_from_unknown(struct hostapd_data *hapd, const u8 *src,
6107 int wds)
6108 {
6109 struct sta_info *sta;
6110
6111 sta = ap_get_sta(hapd, src);
6112 if (sta &&
6113 ((sta->flags & WLAN_STA_ASSOC) ||
6114 ((sta->flags & WLAN_STA_ASSOC_REQ_OK) && wds))) {
6115 if (!hapd->conf->wds_sta)
6116 return;
6117
6118 if ((sta->flags & (WLAN_STA_ASSOC | WLAN_STA_ASSOC_REQ_OK)) ==
6119 WLAN_STA_ASSOC_REQ_OK) {
6120 wpa_printf(MSG_DEBUG,
6121 "Postpone 4-address WDS mode enabling for STA "
6122 MACSTR " since TX status for AssocResp is not yet known",
6123 MAC2STR(sta->addr));
6124 sta->pending_wds_enable = 1;
6125 return;
6126 }
6127
6128 if (wds && !(sta->flags & WLAN_STA_WDS)) {
6129 int ret;
6130 char ifname_wds[IFNAMSIZ + 1];
6131
6132 wpa_printf(MSG_DEBUG, "Enable 4-address WDS mode for "
6133 "STA " MACSTR " (aid %u)",
6134 MAC2STR(sta->addr), sta->aid);
6135 sta->flags |= WLAN_STA_WDS;
6136 ret = hostapd_set_wds_sta(hapd, ifname_wds,
6137 sta->addr, sta->aid, 1);
6138 if (!ret)
6139 hostapd_set_wds_encryption(hapd, sta,
6140 ifname_wds);
6141 }
6142 return;
6143 }
6144
6145 wpa_printf(MSG_DEBUG, "Data/PS-poll frame from not associated STA "
6146 MACSTR, MAC2STR(src));
6147 if (is_multicast_ether_addr(src) || is_zero_ether_addr(src) ||
6148 os_memcmp(src, hapd->own_addr, ETH_ALEN) == 0) {
6149 /* Broadcast bit set in SA or unexpected SA?! Ignore the frame
6150 * silently. */
6151 return;
6152 }
6153
6154 if (sta && (sta->flags & WLAN_STA_ASSOC_REQ_OK)) {
6155 wpa_printf(MSG_DEBUG, "Association Response to the STA has "
6156 "already been sent, but no TX status yet known - "
6157 "ignore Class 3 frame issue with " MACSTR,
6158 MAC2STR(src));
6159 return;
6160 }
6161
6162 if (sta && (sta->flags & WLAN_STA_AUTH))
6163 hostapd_drv_sta_disassoc(
6164 hapd, src,
6165 WLAN_REASON_CLASS3_FRAME_FROM_NONASSOC_STA);
6166 else
6167 hostapd_drv_sta_deauth(
6168 hapd, src,
6169 WLAN_REASON_CLASS3_FRAME_FROM_NONASSOC_STA);
6170 }
6171
6172
hostapd_add_tpe_info(u8 * eid,u8 tx_pwr_count,enum max_tx_pwr_interpretation tx_pwr_intrpn,u8 tx_pwr_cat,u8 tx_pwr)6173 static u8 * hostapd_add_tpe_info(u8 *eid, u8 tx_pwr_count,
6174 enum max_tx_pwr_interpretation tx_pwr_intrpn,
6175 u8 tx_pwr_cat, u8 tx_pwr)
6176 {
6177 int i;
6178
6179 *eid++ = WLAN_EID_TRANSMIT_POWER_ENVELOPE; /* Element ID */
6180 *eid++ = 2 + tx_pwr_count; /* Length */
6181
6182 /*
6183 * Transmit Power Information field
6184 * bits 0-2 : Maximum Transmit Power Count
6185 * bits 3-5 : Maximum Transmit Power Interpretation
6186 * bits 6-7 : Maximum Transmit Power Category
6187 */
6188 *eid++ = tx_pwr_count | (tx_pwr_intrpn << 3) | (tx_pwr_cat << 6);
6189
6190 /* Maximum Transmit Power field */
6191 for (i = 0; i <= tx_pwr_count; i++)
6192 *eid++ = tx_pwr;
6193
6194 return eid;
6195 }
6196
6197
6198 /*
6199 * TODO: Extract power limits from channel data after 6G regulatory
6200 * support.
6201 */
6202 #define REG_PSD_MAX_TXPOWER_FOR_DEFAULT_CLIENT (-1) /* dBm/MHz */
6203 #define REG_PSD_MAX_TXPOWER_FOR_SUBORDINATE_CLIENT 5 /* dBm/MHz */
6204
hostapd_eid_txpower_envelope(struct hostapd_data * hapd,u8 * eid)6205 u8 * hostapd_eid_txpower_envelope(struct hostapd_data *hapd, u8 *eid)
6206 {
6207 struct hostapd_iface *iface = hapd->iface;
6208 struct hostapd_config *iconf = iface->conf;
6209 struct hostapd_hw_modes *mode = iface->current_mode;
6210 struct hostapd_channel_data *chan;
6211 int dfs, i;
6212 u8 channel, tx_pwr_count, local_pwr_constraint;
6213 int max_tx_power;
6214 u8 tx_pwr;
6215
6216 if (!mode)
6217 return eid;
6218
6219 if (ieee80211_freq_to_chan(iface->freq, &channel) == NUM_HOSTAPD_MODES)
6220 return eid;
6221
6222 for (i = 0; i < mode->num_channels; i++) {
6223 if (mode->channels[i].freq == iface->freq)
6224 break;
6225 }
6226 if (i == mode->num_channels)
6227 return eid;
6228
6229 #ifdef CONFIG_IEEE80211AX
6230 /* IEEE Std 802.11ax-2021, Annex E.2.7 (6 GHz band in the United
6231 * States): An AP that is an Indoor Access Point per regulatory rules
6232 * shall send at least two Transmit Power Envelope elements in Beacon
6233 * and Probe Response frames as follows:
6234 * - Maximum Transmit Power Category subfield = Default;
6235 * Unit interpretation = Regulatory client EIRP PSD
6236 * - Maximum Transmit Power Category subfield = Subordinate Device;
6237 * Unit interpretation = Regulatory client EIRP PSD
6238 */
6239 if (is_6ghz_op_class(iconf->op_class)) {
6240 enum max_tx_pwr_interpretation tx_pwr_intrpn;
6241
6242 /* Same Maximum Transmit Power for all 20 MHz bands */
6243 tx_pwr_count = 0;
6244 tx_pwr_intrpn = REGULATORY_CLIENT_EIRP_PSD;
6245
6246 /* Default Transmit Power Envelope for Global Operating Class */
6247 tx_pwr = REG_PSD_MAX_TXPOWER_FOR_DEFAULT_CLIENT * 2;
6248 eid = hostapd_add_tpe_info(eid, tx_pwr_count, tx_pwr_intrpn,
6249 REG_DEFAULT_CLIENT, tx_pwr);
6250
6251 /* Indoor Access Point must include an additional TPE for
6252 * subordinate devices */
6253 if (iconf->he_6ghz_reg_pwr_type == HE_6GHZ_INDOOR_AP) {
6254 /* TODO: Extract PSD limits from channel data */
6255 tx_pwr = REG_PSD_MAX_TXPOWER_FOR_SUBORDINATE_CLIENT * 2;
6256 eid = hostapd_add_tpe_info(eid, tx_pwr_count,
6257 tx_pwr_intrpn,
6258 REG_SUBORDINATE_CLIENT,
6259 tx_pwr);
6260 }
6261
6262 return eid;
6263 }
6264 #endif /* CONFIG_IEEE80211AX */
6265
6266 switch (hostapd_get_oper_chwidth(iconf)) {
6267 case CONF_OPER_CHWIDTH_USE_HT:
6268 if (iconf->secondary_channel == 0) {
6269 /* Max Transmit Power count = 0 (20 MHz) */
6270 tx_pwr_count = 0;
6271 } else {
6272 /* Max Transmit Power count = 1 (20, 40 MHz) */
6273 tx_pwr_count = 1;
6274 }
6275 break;
6276 case CONF_OPER_CHWIDTH_80MHZ:
6277 /* Max Transmit Power count = 2 (20, 40, and 80 MHz) */
6278 tx_pwr_count = 2;
6279 break;
6280 case CONF_OPER_CHWIDTH_80P80MHZ:
6281 case CONF_OPER_CHWIDTH_160MHZ:
6282 /* Max Transmit Power count = 3 (20, 40, 80, 160/80+80 MHz) */
6283 tx_pwr_count = 3;
6284 break;
6285 default:
6286 return eid;
6287 }
6288
6289 /*
6290 * Below local_pwr_constraint logic is referred from
6291 * hostapd_eid_pwr_constraint.
6292 *
6293 * Check if DFS is required by regulatory.
6294 */
6295 dfs = hostapd_is_dfs_required(hapd->iface);
6296 if (dfs < 0)
6297 dfs = 0;
6298
6299 /*
6300 * In order to meet regulations when TPC is not implemented using
6301 * a transmit power that is below the legal maximum (including any
6302 * mitigation factor) should help. In this case, indicate 3 dB below
6303 * maximum allowed transmit power.
6304 */
6305 if (hapd->iconf->local_pwr_constraint == -1)
6306 local_pwr_constraint = (dfs == 0) ? 0 : 3;
6307 else
6308 local_pwr_constraint = hapd->iconf->local_pwr_constraint;
6309
6310 /*
6311 * A STA that is not an AP shall use a transmit power less than or
6312 * equal to the local maximum transmit power level for the channel.
6313 * The local maximum transmit power can be calculated from the formula:
6314 * local max TX pwr = max TX pwr - local pwr constraint
6315 * Where max TX pwr is maximum transmit power level specified for
6316 * channel in Country element and local pwr constraint is specified
6317 * for channel in this Power Constraint element.
6318 */
6319 chan = &mode->channels[i];
6320 max_tx_power = chan->max_tx_power - local_pwr_constraint;
6321
6322 /*
6323 * Local Maximum Transmit power is encoded as two's complement
6324 * with a 0.5 dB step.
6325 */
6326 max_tx_power *= 2; /* in 0.5 dB steps */
6327 if (max_tx_power > 127) {
6328 /* 63.5 has special meaning of 63.5 dBm or higher */
6329 max_tx_power = 127;
6330 }
6331 if (max_tx_power < -128)
6332 max_tx_power = -128;
6333 if (max_tx_power < 0)
6334 tx_pwr = 0x80 + max_tx_power + 128;
6335 else
6336 tx_pwr = max_tx_power;
6337
6338 return hostapd_add_tpe_info(eid, tx_pwr_count, LOCAL_EIRP,
6339 0 /* Reserved for bands other than 6 GHz */,
6340 tx_pwr);
6341 }
6342
6343
hostapd_eid_wb_chsw_wrapper(struct hostapd_data * hapd,u8 * eid)6344 u8 * hostapd_eid_wb_chsw_wrapper(struct hostapd_data *hapd, u8 *eid)
6345 {
6346 u8 bw, chan1, chan2 = 0;
6347 int freq1;
6348
6349 if (!hapd->cs_freq_params.channel ||
6350 (!hapd->cs_freq_params.vht_enabled &&
6351 !hapd->cs_freq_params.he_enabled &&
6352 !hapd->cs_freq_params.eht_enabled))
6353 return eid;
6354
6355 /* bandwidth: 0: 40, 1: 80, 2: 160, 3: 80+80, 4: 320 */
6356 switch (hapd->cs_freq_params.bandwidth) {
6357 case 40:
6358 bw = 0;
6359 break;
6360 case 80:
6361 /* check if it's 80+80 */
6362 if (!hapd->cs_freq_params.center_freq2)
6363 bw = 1;
6364 else
6365 bw = 3;
6366 break;
6367 case 160:
6368 bw = 2;
6369 break;
6370 case 320:
6371 bw = 4;
6372 break;
6373 default:
6374 /* not valid VHT bandwidth or not in CSA */
6375 return eid;
6376 }
6377
6378 freq1 = hapd->cs_freq_params.center_freq1 ?
6379 hapd->cs_freq_params.center_freq1 :
6380 hapd->cs_freq_params.freq;
6381 if (ieee80211_freq_to_chan(freq1, &chan1) !=
6382 HOSTAPD_MODE_IEEE80211A)
6383 return eid;
6384
6385 if (hapd->cs_freq_params.center_freq2 &&
6386 ieee80211_freq_to_chan(hapd->cs_freq_params.center_freq2,
6387 &chan2) != HOSTAPD_MODE_IEEE80211A)
6388 return eid;
6389
6390 *eid++ = WLAN_EID_CHANNEL_SWITCH_WRAPPER;
6391 *eid++ = 5; /* Length of Channel Switch Wrapper */
6392 *eid++ = WLAN_EID_WIDE_BW_CHSWITCH;
6393 *eid++ = 3; /* Length of Wide Bandwidth Channel Switch element */
6394 *eid++ = bw; /* New Channel Width */
6395 *eid++ = chan1; /* New Channel Center Frequency Segment 0 */
6396 *eid++ = chan2; /* New Channel Center Frequency Segment 1 */
6397
6398 return eid;
6399 }
6400
6401
hostapd_eid_nr_db_len(struct hostapd_data * hapd,size_t * current_len)6402 static size_t hostapd_eid_nr_db_len(struct hostapd_data *hapd,
6403 size_t *current_len)
6404 {
6405 struct hostapd_neighbor_entry *nr;
6406 size_t total_len = 0, len = *current_len;
6407
6408 dl_list_for_each(nr, &hapd->nr_db, struct hostapd_neighbor_entry,
6409 list) {
6410 if (!nr->nr || wpabuf_len(nr->nr) < 12)
6411 continue;
6412
6413 if (nr->short_ssid == hapd->conf->ssid.short_ssid)
6414 continue;
6415
6416 /* Start a new element */
6417 if (!len ||
6418 len + RNR_TBTT_HEADER_LEN + RNR_TBTT_INFO_LEN > 255) {
6419 len = RNR_HEADER_LEN;
6420 total_len += RNR_HEADER_LEN;
6421 }
6422
6423 len += RNR_TBTT_HEADER_LEN + RNR_TBTT_INFO_LEN;
6424 total_len += RNR_TBTT_HEADER_LEN + RNR_TBTT_INFO_LEN;
6425 }
6426
6427 *current_len = len;
6428 return total_len;
6429 }
6430
6431
6432 struct mbssid_ie_profiles {
6433 u8 start;
6434 u8 end;
6435 };
6436
6437 static size_t
hostapd_eid_rnr_iface_len(struct hostapd_data * hapd,struct hostapd_data * reporting_hapd,size_t * current_len,struct mbssid_ie_profiles * skip_profiles)6438 hostapd_eid_rnr_iface_len(struct hostapd_data *hapd,
6439 struct hostapd_data *reporting_hapd,
6440 size_t *current_len,
6441 struct mbssid_ie_profiles *skip_profiles)
6442 {
6443 size_t total_len = 0, len = *current_len;
6444 int tbtt_count = 0;
6445 size_t i, start = 0;
6446
6447 while (start < hapd->iface->num_bss) {
6448 if (!len ||
6449 len + RNR_TBTT_HEADER_LEN + RNR_TBTT_INFO_LEN > 255) {
6450 len = RNR_HEADER_LEN;
6451 total_len += RNR_HEADER_LEN;
6452 }
6453
6454 len += RNR_TBTT_HEADER_LEN;
6455 total_len += RNR_TBTT_HEADER_LEN;
6456
6457 for (i = start; i < hapd->iface->num_bss; i++) {
6458 struct hostapd_data *bss = hapd->iface->bss[i];
6459
6460 if (!bss || !bss->conf || !bss->started)
6461 continue;
6462
6463 if (bss == reporting_hapd ||
6464 bss->conf->ignore_broadcast_ssid)
6465 continue;
6466
6467 if (skip_profiles &&
6468 i >= skip_profiles->start && i < skip_profiles->end)
6469 continue;
6470
6471 if (len + RNR_TBTT_INFO_LEN > 255 ||
6472 tbtt_count >= RNR_TBTT_INFO_COUNT_MAX)
6473 break;
6474
6475 len += RNR_TBTT_INFO_LEN;
6476 total_len += RNR_TBTT_INFO_LEN;
6477 tbtt_count++;
6478 }
6479 start = i;
6480 }
6481
6482 if (!tbtt_count)
6483 total_len = 0;
6484 else
6485 *current_len = len;
6486
6487 return total_len;
6488 }
6489
6490
6491 enum colocation_mode {
6492 NO_COLOCATED_6GHZ,
6493 STANDALONE_6GHZ,
6494 COLOCATED_6GHZ,
6495 COLOCATED_LOWER_BAND,
6496 };
6497
get_colocation_mode(struct hostapd_data * hapd)6498 static enum colocation_mode get_colocation_mode(struct hostapd_data *hapd)
6499 {
6500 u8 i;
6501 bool is_6ghz = is_6ghz_op_class(hapd->iconf->op_class);
6502
6503 if (!hapd->iface || !hapd->iface->interfaces)
6504 return NO_COLOCATED_6GHZ;
6505
6506 if (is_6ghz && hapd->iface->interfaces->count == 1)
6507 return STANDALONE_6GHZ;
6508
6509 for (i = 0; i < hapd->iface->interfaces->count; i++) {
6510 struct hostapd_iface *iface;
6511 bool is_colocated_6ghz;
6512
6513 iface = hapd->iface->interfaces->iface[i];
6514 if (iface == hapd->iface || !iface || !iface->conf)
6515 continue;
6516
6517 is_colocated_6ghz = is_6ghz_op_class(iface->conf->op_class);
6518 if (!is_6ghz && is_colocated_6ghz)
6519 return COLOCATED_LOWER_BAND;
6520 if (is_6ghz && !is_colocated_6ghz)
6521 return COLOCATED_6GHZ;
6522 }
6523
6524 if (is_6ghz)
6525 return STANDALONE_6GHZ;
6526
6527 return NO_COLOCATED_6GHZ;
6528 }
6529
6530
hostapd_eid_rnr_colocation_len(struct hostapd_data * hapd,size_t * current_len)6531 static size_t hostapd_eid_rnr_colocation_len(struct hostapd_data *hapd,
6532 size_t *current_len)
6533 {
6534 struct hostapd_iface *iface;
6535 size_t len = 0;
6536 size_t i;
6537
6538 if (!hapd->iface || !hapd->iface->interfaces)
6539 return 0;
6540
6541 for (i = 0; i < hapd->iface->interfaces->count; i++) {
6542 iface = hapd->iface->interfaces->iface[i];
6543
6544 if (iface == hapd->iface ||
6545 !is_6ghz_op_class(iface->conf->op_class))
6546 continue;
6547
6548 len += hostapd_eid_rnr_iface_len(iface->bss[0], hapd,
6549 current_len, NULL);
6550 }
6551
6552 return len;
6553 }
6554
6555
hostapd_eid_rnr_len(struct hostapd_data * hapd,u32 type)6556 size_t hostapd_eid_rnr_len(struct hostapd_data *hapd, u32 type)
6557 {
6558 size_t total_len = 0, current_len = 0;
6559 enum colocation_mode mode = get_colocation_mode(hapd);
6560
6561 switch (type) {
6562 case WLAN_FC_STYPE_BEACON:
6563 if (hapd->conf->rnr)
6564 total_len += hostapd_eid_nr_db_len(hapd, ¤t_len);
6565 /* fallthrough */
6566
6567 case WLAN_FC_STYPE_PROBE_RESP:
6568 if (mode == COLOCATED_LOWER_BAND)
6569 total_len += hostapd_eid_rnr_colocation_len(
6570 hapd, ¤t_len);
6571
6572 if (hapd->conf->rnr && hapd->iface->num_bss > 1 &&
6573 !hapd->iconf->mbssid)
6574 total_len += hostapd_eid_rnr_iface_len(hapd, hapd,
6575 ¤t_len,
6576 NULL);
6577 break;
6578
6579 case WLAN_FC_STYPE_ACTION:
6580 if (hapd->iface->num_bss > 1 && mode == STANDALONE_6GHZ)
6581 total_len += hostapd_eid_rnr_iface_len(hapd, hapd,
6582 ¤t_len,
6583 NULL);
6584 break;
6585
6586 default:
6587 break;
6588 }
6589
6590 return total_len;
6591 }
6592
6593
hostapd_eid_nr_db(struct hostapd_data * hapd,u8 * eid,size_t * current_len)6594 static u8 * hostapd_eid_nr_db(struct hostapd_data *hapd, u8 *eid,
6595 size_t *current_len)
6596 {
6597 struct hostapd_neighbor_entry *nr;
6598 size_t len = *current_len;
6599 u8 *size_offset = (eid - len) + 1;
6600
6601 dl_list_for_each(nr, &hapd->nr_db, struct hostapd_neighbor_entry,
6602 list) {
6603 if (!nr->nr || wpabuf_len(nr->nr) < 12)
6604 continue;
6605
6606 if (nr->short_ssid == hapd->conf->ssid.short_ssid)
6607 continue;
6608
6609 /* Start a new element */
6610 if (!len ||
6611 len + RNR_TBTT_HEADER_LEN + RNR_TBTT_INFO_LEN > 255) {
6612 *eid++ = WLAN_EID_REDUCED_NEIGHBOR_REPORT;
6613 size_offset = eid++;
6614 len = RNR_HEADER_LEN;
6615 }
6616
6617 /* TBTT Information Header subfield (2 octets) */
6618 *eid++ = 0;
6619 /* TBTT Information Length */
6620 *eid++ = RNR_TBTT_INFO_LEN;
6621 /* Operating Class */
6622 *eid++ = wpabuf_head_u8(nr->nr)[10];
6623 /* Channel Number */
6624 *eid++ = wpabuf_head_u8(nr->nr)[11];
6625 len += RNR_TBTT_HEADER_LEN;
6626 /* TBTT Information Set */
6627 /* TBTT Information field */
6628 /* Neighbor AP TBTT Offset */
6629 *eid++ = RNR_NEIGHBOR_AP_OFFSET_UNKNOWN;
6630 /* BSSID */
6631 os_memcpy(eid, nr->bssid, ETH_ALEN);
6632 eid += ETH_ALEN;
6633 /* Short SSID */
6634 os_memcpy(eid, &nr->short_ssid, 4);
6635 eid += 4;
6636 /* BSS parameters */
6637 *eid++ = nr->bss_parameters;
6638 /* 20 MHz PSD */
6639 *eid++ = RNR_20_MHZ_PSD_MAX_TXPOWER - 1;
6640 len += RNR_TBTT_INFO_LEN;
6641 *size_offset = (eid - size_offset) - 1;
6642 }
6643
6644 *current_len = len;
6645 return eid;
6646 }
6647
6648
hostapd_eid_rnr_iface(struct hostapd_data * hapd,struct hostapd_data * reporting_hapd,u8 * eid,size_t * current_len,struct mbssid_ie_profiles * skip_profiles)6649 static u8 * hostapd_eid_rnr_iface(struct hostapd_data *hapd,
6650 struct hostapd_data *reporting_hapd,
6651 u8 *eid, size_t *current_len,
6652 struct mbssid_ie_profiles *skip_profiles)
6653 {
6654 struct hostapd_data *bss;
6655 struct hostapd_iface *iface = hapd->iface;
6656 size_t i, start = 0;
6657 size_t len = *current_len;
6658 u8 *tbtt_count_pos, *eid_start = eid, *size_offset = (eid - len) + 1;
6659 u8 tbtt_count = 0, op_class, channel, bss_param;
6660
6661 if (!(iface->drv_flags & WPA_DRIVER_FLAGS_AP_CSA) || !iface->freq)
6662 return eid;
6663
6664 if (ieee80211_freq_to_channel_ext(iface->freq,
6665 hapd->iconf->secondary_channel,
6666 hostapd_get_oper_chwidth(hapd->iconf),
6667 &op_class, &channel) ==
6668 NUM_HOSTAPD_MODES)
6669 return eid;
6670
6671 while (start < iface->num_bss) {
6672 if (!len ||
6673 len + RNR_TBTT_HEADER_LEN + RNR_TBTT_INFO_LEN > 255) {
6674 eid_start = eid;
6675 *eid++ = WLAN_EID_REDUCED_NEIGHBOR_REPORT;
6676 size_offset = eid++;
6677 len = RNR_HEADER_LEN;
6678 tbtt_count = 0;
6679 }
6680
6681 tbtt_count_pos = eid++;
6682 *eid++ = RNR_TBTT_INFO_LEN;
6683 *eid++ = op_class;
6684 *eid++ = hapd->iconf->channel;
6685 len += RNR_TBTT_HEADER_LEN;
6686
6687 for (i = start; i < iface->num_bss; i++) {
6688 bss_param = 0;
6689 bss = iface->bss[i];
6690 if (!bss || !bss->conf || !bss->started)
6691 continue;
6692
6693 if (bss == reporting_hapd ||
6694 bss->conf->ignore_broadcast_ssid)
6695 continue;
6696
6697 if (skip_profiles &&
6698 i >= skip_profiles->start && i < skip_profiles->end)
6699 continue;
6700
6701 if (len + RNR_TBTT_INFO_LEN > 255 ||
6702 tbtt_count >= RNR_TBTT_INFO_COUNT_MAX)
6703 break;
6704
6705 *eid++ = RNR_NEIGHBOR_AP_OFFSET_UNKNOWN;
6706 os_memcpy(eid, bss->own_addr, ETH_ALEN);
6707 eid += ETH_ALEN;
6708 os_memcpy(eid, &bss->conf->ssid.short_ssid, 4);
6709 eid += 4;
6710 if (bss->conf->ssid.short_ssid ==
6711 reporting_hapd->conf->ssid.short_ssid)
6712 bss_param |= RNR_BSS_PARAM_SAME_SSID;
6713
6714 if (iface->conf->mbssid != MBSSID_DISABLED &&
6715 iface->num_bss > 1) {
6716 bss_param |= RNR_BSS_PARAM_MULTIPLE_BSSID;
6717 if (bss == hostapd_mbssid_get_tx_bss(hapd))
6718 bss_param |=
6719 RNR_BSS_PARAM_TRANSMITTED_BSSID;
6720 }
6721
6722 if (is_6ghz_op_class(hapd->iconf->op_class) &&
6723 bss->conf->unsol_bcast_probe_resp_interval)
6724 bss_param |=
6725 RNR_BSS_PARAM_UNSOLIC_PROBE_RESP_ACTIVE;
6726
6727 bss_param |= RNR_BSS_PARAM_CO_LOCATED;
6728
6729 *eid++ = bss_param;
6730 *eid++ = RNR_20_MHZ_PSD_MAX_TXPOWER - 1;
6731 len += RNR_TBTT_INFO_LEN;
6732 tbtt_count += 1;
6733 }
6734
6735 start = i;
6736 *tbtt_count_pos = RNR_TBTT_INFO_COUNT(tbtt_count - 1);
6737 *size_offset = (eid - size_offset) - 1;
6738 }
6739
6740 if (tbtt_count == 0)
6741 return eid_start;
6742
6743 *current_len = len;
6744 return eid;
6745 }
6746
6747
hostapd_eid_rnr_colocation(struct hostapd_data * hapd,u8 * eid,size_t * current_len)6748 static u8 * hostapd_eid_rnr_colocation(struct hostapd_data *hapd, u8 *eid,
6749 size_t *current_len)
6750 {
6751 struct hostapd_iface *iface;
6752 size_t i;
6753
6754 if (!hapd->iface || !hapd->iface->interfaces)
6755 return eid;
6756
6757 for (i = 0; i < hapd->iface->interfaces->count; i++) {
6758 iface = hapd->iface->interfaces->iface[i];
6759
6760 if (iface == hapd->iface ||
6761 !is_6ghz_op_class(iface->conf->op_class))
6762 continue;
6763
6764 eid = hostapd_eid_rnr_iface(iface->bss[0], hapd, eid,
6765 current_len, NULL);
6766 }
6767
6768 return eid;
6769 }
6770
6771
hostapd_eid_rnr(struct hostapd_data * hapd,u8 * eid,u32 type)6772 u8 * hostapd_eid_rnr(struct hostapd_data *hapd, u8 *eid, u32 type)
6773 {
6774 u8 *eid_start = eid;
6775 size_t current_len = 0;
6776 enum colocation_mode mode = get_colocation_mode(hapd);
6777
6778 switch (type) {
6779 case WLAN_FC_STYPE_BEACON:
6780 if (hapd->conf->rnr)
6781 eid = hostapd_eid_nr_db(hapd, eid, ¤t_len);
6782 /* fallthrough */
6783
6784 case WLAN_FC_STYPE_PROBE_RESP:
6785 if (mode == COLOCATED_LOWER_BAND)
6786 eid = hostapd_eid_rnr_colocation(hapd, eid,
6787 ¤t_len);
6788
6789 if (hapd->conf->rnr && hapd->iface->num_bss > 1 &&
6790 !hapd->iconf->mbssid)
6791 eid = hostapd_eid_rnr_iface(hapd, hapd, eid,
6792 ¤t_len, NULL);
6793 break;
6794
6795 case WLAN_FC_STYPE_ACTION:
6796 if (hapd->iface->num_bss > 1 && mode == STANDALONE_6GHZ)
6797 eid = hostapd_eid_rnr_iface(hapd, hapd, eid,
6798 ¤t_len, NULL);
6799 break;
6800
6801 default:
6802 return eid_start;
6803 }
6804
6805 if (eid == eid_start + 2)
6806 return eid_start;
6807
6808 return eid;
6809 }
6810
6811
mbssid_known_bss(unsigned int i,const u8 * known_bss,size_t known_bss_len)6812 static bool mbssid_known_bss(unsigned int i, const u8 *known_bss,
6813 size_t known_bss_len)
6814 {
6815 if (!known_bss || known_bss_len <= i / 8)
6816 return false;
6817 known_bss = &known_bss[i / 8];
6818 return *known_bss & (u8) (BIT(i % 8));
6819 }
6820
6821
hostapd_eid_mbssid_elem_len(struct hostapd_data * hapd,u32 frame_type,size_t * bss_index,const u8 * known_bss,size_t known_bss_len)6822 static size_t hostapd_eid_mbssid_elem_len(struct hostapd_data *hapd,
6823 u32 frame_type, size_t *bss_index,
6824 const u8 *known_bss,
6825 size_t known_bss_len)
6826 {
6827 struct hostapd_data *tx_bss = hostapd_mbssid_get_tx_bss(hapd);
6828 size_t len = 3, i;
6829
6830 for (i = *bss_index; i < hapd->iface->num_bss; i++) {
6831 struct hostapd_data *bss = hapd->iface->bss[i];
6832 const u8 *auth, *rsn = NULL, *rsnx = NULL;
6833 size_t nontx_profile_len, auth_len;
6834 u8 ie_count = 0;
6835
6836 if (!bss || !bss->conf || !bss->started ||
6837 mbssid_known_bss(i, known_bss, known_bss_len))
6838 continue;
6839
6840 /*
6841 * Sublement ID: 1 octet
6842 * Length: 1 octet
6843 * Nontransmitted capabilities: 4 octets
6844 * SSID element: 2 + variable
6845 * Multiple BSSID Index Element: 3 octets (+2 octets in beacons)
6846 * Fixed length = 1 + 1 + 4 + 2 + 3 = 11
6847 */
6848 nontx_profile_len = 11 + bss->conf->ssid.ssid_len;
6849
6850 if (frame_type == WLAN_FC_STYPE_BEACON)
6851 nontx_profile_len += 2;
6852
6853 auth = wpa_auth_get_wpa_ie(bss->wpa_auth, &auth_len);
6854 if (auth) {
6855 rsn = get_ie(auth, auth_len, WLAN_EID_RSN);
6856 if (rsn)
6857 nontx_profile_len += 2 + rsn[1];
6858
6859 rsnx = get_ie(auth, auth_len, WLAN_EID_RSNX);
6860 if (rsnx)
6861 nontx_profile_len += 2 + rsnx[1];
6862 }
6863 if (!rsn && hostapd_wpa_ie(tx_bss, WLAN_EID_RSN))
6864 ie_count++;
6865 if (!rsnx && hostapd_wpa_ie(tx_bss, WLAN_EID_RSNX))
6866 ie_count++;
6867 if (bss->conf->xrates_supported)
6868 nontx_profile_len += 8;
6869 else if (hapd->conf->xrates_supported)
6870 ie_count++;
6871 if (ie_count)
6872 nontx_profile_len += 4 + ie_count;
6873
6874 if (len + nontx_profile_len > 255)
6875 break;
6876
6877 len += nontx_profile_len;
6878 }
6879
6880 *bss_index = i;
6881 return len;
6882 }
6883
6884
hostapd_eid_mbssid_len(struct hostapd_data * hapd,u32 frame_type,u8 * elem_count,const u8 * known_bss,size_t known_bss_len,size_t * rnr_len)6885 size_t hostapd_eid_mbssid_len(struct hostapd_data *hapd, u32 frame_type,
6886 u8 *elem_count, const u8 *known_bss,
6887 size_t known_bss_len, size_t *rnr_len)
6888 {
6889 size_t len = 0, bss_index = 1;
6890
6891 if (!hapd->iconf->mbssid || hapd->iface->num_bss <= 1 ||
6892 (frame_type != WLAN_FC_STYPE_BEACON &&
6893 frame_type != WLAN_FC_STYPE_PROBE_RESP))
6894 return 0;
6895
6896 if (frame_type == WLAN_FC_STYPE_BEACON) {
6897 if (!elem_count) {
6898 wpa_printf(MSG_INFO,
6899 "MBSSID: Insufficient data for Beacon frames");
6900 return 0;
6901 }
6902 *elem_count = 0;
6903 }
6904
6905 while (bss_index < hapd->iface->num_bss) {
6906 size_t rnr_count = bss_index;
6907
6908 len += hostapd_eid_mbssid_elem_len(hapd, frame_type,
6909 &bss_index, known_bss,
6910 known_bss_len);
6911
6912 if (frame_type == WLAN_FC_STYPE_BEACON)
6913 *elem_count += 1;
6914 if (hapd->iconf->mbssid == ENHANCED_MBSSID_ENABLED && rnr_len) {
6915 size_t rnr_cur_len = 0;
6916 struct mbssid_ie_profiles skip_profiles = {
6917 rnr_count, bss_index
6918 };
6919
6920 *rnr_len += hostapd_eid_rnr_iface_len(
6921 hapd, hostapd_mbssid_get_tx_bss(hapd),
6922 &rnr_cur_len, &skip_profiles);
6923 }
6924 }
6925
6926 if (hapd->iconf->mbssid == ENHANCED_MBSSID_ENABLED && rnr_len)
6927 *rnr_len += hostapd_eid_rnr_len(hapd, frame_type);
6928
6929 return len;
6930 }
6931
6932
hostapd_eid_mbssid_elem(struct hostapd_data * hapd,u8 * eid,u8 * end,u32 frame_type,u8 max_bssid_indicator,size_t * bss_index,u8 elem_count,const u8 * known_bss,size_t known_bss_len)6933 static u8 * hostapd_eid_mbssid_elem(struct hostapd_data *hapd, u8 *eid, u8 *end,
6934 u32 frame_type, u8 max_bssid_indicator,
6935 size_t *bss_index, u8 elem_count,
6936 const u8 *known_bss, size_t known_bss_len)
6937 {
6938 struct hostapd_data *tx_bss = hostapd_mbssid_get_tx_bss(hapd);
6939 size_t i;
6940 u8 *eid_len_offset, *max_bssid_indicator_offset;
6941
6942 *eid++ = WLAN_EID_MULTIPLE_BSSID;
6943 eid_len_offset = eid++;
6944 max_bssid_indicator_offset = eid++;
6945
6946 for (i = *bss_index; i < hapd->iface->num_bss; i++) {
6947 struct hostapd_data *bss = hapd->iface->bss[i];
6948 struct hostapd_bss_config *conf;
6949 u8 *eid_len_pos, *nontx_bss_start = eid;
6950 const u8 *auth, *rsn = NULL, *rsnx = NULL;
6951 u8 ie_count = 0, non_inherit_ie[3];
6952 size_t auth_len = 0;
6953 u16 capab_info;
6954
6955 if (!bss || !bss->conf || !bss->started ||
6956 mbssid_known_bss(i, known_bss, known_bss_len))
6957 continue;
6958 conf = bss->conf;
6959
6960 *eid++ = WLAN_MBSSID_SUBELEMENT_NONTRANSMITTED_BSSID_PROFILE;
6961 eid_len_pos = eid++;
6962
6963 capab_info = hostapd_own_capab_info(bss);
6964 *eid++ = WLAN_EID_NONTRANSMITTED_BSSID_CAPA;
6965 *eid++ = sizeof(capab_info);
6966 WPA_PUT_LE16(eid, capab_info);
6967 eid += sizeof(capab_info);
6968
6969 *eid++ = WLAN_EID_SSID;
6970 *eid++ = conf->ssid.ssid_len;
6971 os_memcpy(eid, conf->ssid.ssid, conf->ssid.ssid_len);
6972 eid += conf->ssid.ssid_len;
6973
6974 *eid++ = WLAN_EID_MULTIPLE_BSSID_INDEX;
6975 if (frame_type == WLAN_FC_STYPE_BEACON) {
6976 *eid++ = 3;
6977 *eid++ = i; /* BSSID Index */
6978 if (hapd->iconf->mbssid == ENHANCED_MBSSID_ENABLED &&
6979 (conf->dtim_period % elem_count))
6980 conf->dtim_period = elem_count;
6981 *eid++ = conf->dtim_period;
6982 *eid++ = 0xFF; /* DTIM Count */
6983 } else {
6984 /* Probe Request frame does not include DTIM Period and
6985 * DTIM Count fields. */
6986 *eid++ = 1;
6987 *eid++ = i; /* BSSID Index */
6988 }
6989
6990 auth = wpa_auth_get_wpa_ie(bss->wpa_auth, &auth_len);
6991 if (auth) {
6992 rsn = get_ie(auth, auth_len, WLAN_EID_RSN);
6993 if (rsn) {
6994 os_memcpy(eid, rsn, 2 + rsn[1]);
6995 eid += 2 + rsn[1];
6996 }
6997
6998 rsnx = get_ie(auth, auth_len, WLAN_EID_RSNX);
6999 if (rsnx) {
7000 os_memcpy(eid, rsnx, 2 + rsnx[1]);
7001 eid += 2 + rsnx[1];
7002 }
7003 }
7004 if (!rsn && hostapd_wpa_ie(tx_bss, WLAN_EID_RSN))
7005 non_inherit_ie[ie_count++] = WLAN_EID_RSN;
7006 if (!rsnx && hostapd_wpa_ie(tx_bss, WLAN_EID_RSNX))
7007 non_inherit_ie[ie_count++] = WLAN_EID_RSNX;
7008 if (hapd->conf->xrates_supported &&
7009 !bss->conf->xrates_supported)
7010 non_inherit_ie[ie_count++] = WLAN_EID_EXT_SUPP_RATES;
7011 if (ie_count) {
7012 *eid++ = WLAN_EID_EXTENSION;
7013 *eid++ = 2 + ie_count;
7014 *eid++ = WLAN_EID_EXT_NON_INHERITANCE;
7015 *eid++ = ie_count;
7016 os_memcpy(eid, non_inherit_ie, ie_count);
7017 eid += ie_count;
7018 }
7019
7020 *eid_len_pos = (eid - eid_len_pos) - 1;
7021
7022 if (((eid - eid_len_offset) - 1) > 255) {
7023 eid = nontx_bss_start;
7024 break;
7025 }
7026 }
7027
7028 *bss_index = i;
7029 *max_bssid_indicator_offset = max_bssid_indicator;
7030 if (*max_bssid_indicator_offset < 1)
7031 *max_bssid_indicator_offset = 1;
7032 *eid_len_offset = (eid - eid_len_offset) - 1;
7033 return eid;
7034 }
7035
7036
hostapd_eid_mbssid(struct hostapd_data * hapd,u8 * eid,u8 * end,unsigned int frame_stype,u8 elem_count,u8 ** elem_offset,const u8 * known_bss,size_t known_bss_len,u8 * rnr_eid,u8 * rnr_count,u8 ** rnr_offset,size_t rnr_len)7037 u8 * hostapd_eid_mbssid(struct hostapd_data *hapd, u8 *eid, u8 *end,
7038 unsigned int frame_stype, u8 elem_count,
7039 u8 **elem_offset,
7040 const u8 *known_bss, size_t known_bss_len, u8 *rnr_eid,
7041 u8 *rnr_count, u8 **rnr_offset, size_t rnr_len)
7042 {
7043 size_t bss_index = 1, cur_len = 0;
7044 u8 elem_index = 0, *rnr_start_eid = rnr_eid;
7045 bool add_rnr;
7046
7047 if (!hapd->iconf->mbssid || hapd->iface->num_bss <= 1 ||
7048 (frame_stype != WLAN_FC_STYPE_BEACON &&
7049 frame_stype != WLAN_FC_STYPE_PROBE_RESP))
7050 return eid;
7051
7052 if (frame_stype == WLAN_FC_STYPE_BEACON && !elem_offset) {
7053 wpa_printf(MSG_INFO,
7054 "MBSSID: Insufficient data for Beacon frames");
7055 return eid;
7056 }
7057
7058 add_rnr = hapd->iconf->mbssid == ENHANCED_MBSSID_ENABLED &&
7059 frame_stype == WLAN_FC_STYPE_BEACON &&
7060 rnr_eid && rnr_count && rnr_offset && rnr_len;
7061
7062 while (bss_index < hapd->iface->num_bss) {
7063 unsigned int rnr_start_count = bss_index;
7064
7065 if (frame_stype == WLAN_FC_STYPE_BEACON) {
7066 if (elem_index == elem_count) {
7067 wpa_printf(MSG_WARNING,
7068 "MBSSID: Larger number of elements than there is room in the provided array");
7069 break;
7070 }
7071
7072 elem_offset[elem_index] = eid;
7073 elem_index = elem_index + 1;
7074 }
7075 eid = hostapd_eid_mbssid_elem(hapd, eid, end, frame_stype,
7076 hostapd_max_bssid_indicator(hapd),
7077 &bss_index, elem_count,
7078 known_bss, known_bss_len);
7079
7080 if (add_rnr) {
7081 struct mbssid_ie_profiles skip_profiles = {
7082 rnr_start_count, bss_index
7083 };
7084
7085 rnr_offset[*rnr_count] = rnr_eid;
7086 *rnr_count = *rnr_count + 1;
7087 cur_len = 0;
7088 rnr_eid = hostapd_eid_rnr_iface(
7089 hapd, hostapd_mbssid_get_tx_bss(hapd),
7090 rnr_eid, &cur_len, &skip_profiles);
7091 }
7092 }
7093
7094 if (add_rnr && (size_t) (rnr_eid - rnr_start_eid) < rnr_len) {
7095 rnr_offset[*rnr_count] = rnr_eid;
7096 *rnr_count = *rnr_count + 1;
7097 cur_len = 0;
7098
7099 if (hapd->conf->rnr)
7100 rnr_eid = hostapd_eid_nr_db(hapd, rnr_eid, &cur_len);
7101 if (get_colocation_mode(hapd) == COLOCATED_LOWER_BAND)
7102 rnr_eid = hostapd_eid_rnr_colocation(hapd, rnr_eid,
7103 &cur_len);
7104 }
7105
7106 return eid;
7107 }
7108
7109
punct_update_legacy_bw_80(u8 bitmap,u8 pri_chan,u8 * seg0)7110 static void punct_update_legacy_bw_80(u8 bitmap, u8 pri_chan, u8 *seg0)
7111 {
7112 u8 first_chan = *seg0 - 6, sec_chan;
7113
7114 switch (bitmap) {
7115 case 0x6:
7116 *seg0 = 0;
7117 return;
7118 case 0x8:
7119 case 0x4:
7120 case 0x2:
7121 case 0x1:
7122 case 0xC:
7123 case 0x3:
7124 if (pri_chan < *seg0)
7125 *seg0 -= 4;
7126 else
7127 *seg0 += 4;
7128 break;
7129 }
7130
7131 if (pri_chan < *seg0)
7132 sec_chan = pri_chan + 4;
7133 else
7134 sec_chan = pri_chan - 4;
7135
7136 if (bitmap & BIT((sec_chan - first_chan) / 4))
7137 *seg0 = 0;
7138 }
7139
7140
punct_update_legacy_bw_160(u8 bitmap,u8 pri,enum oper_chan_width * width,u8 * seg0)7141 static void punct_update_legacy_bw_160(u8 bitmap, u8 pri,
7142 enum oper_chan_width *width, u8 *seg0)
7143 {
7144 if (pri < *seg0) {
7145 *seg0 -= 8;
7146 if (bitmap & 0x0F) {
7147 *width = 0;
7148 punct_update_legacy_bw_80(bitmap & 0xF, pri, seg0);
7149 }
7150 } else {
7151 *seg0 += 8;
7152 if (bitmap & 0xF0) {
7153 *width = 0;
7154 punct_update_legacy_bw_80((bitmap & 0xF0) >> 4, pri,
7155 seg0);
7156 }
7157 }
7158 }
7159
7160
punct_update_legacy_bw(u16 bitmap,u8 pri,enum oper_chan_width * width,u8 * seg0,u8 * seg1)7161 void punct_update_legacy_bw(u16 bitmap, u8 pri, enum oper_chan_width *width,
7162 u8 *seg0, u8 *seg1)
7163 {
7164 if (*width == CONF_OPER_CHWIDTH_80MHZ && (bitmap & 0xF)) {
7165 *width = CONF_OPER_CHWIDTH_USE_HT;
7166 punct_update_legacy_bw_80(bitmap & 0xF, pri, seg0);
7167 }
7168
7169 if (*width == CONF_OPER_CHWIDTH_160MHZ && (bitmap & 0xFF)) {
7170 *width = CONF_OPER_CHWIDTH_80MHZ;
7171 *seg1 = 0;
7172 punct_update_legacy_bw_160(bitmap & 0xFF, pri, width, seg0);
7173 }
7174
7175 /* TODO: 320 MHz */
7176 }
7177
7178 #endif /* CONFIG_NATIVE_WINDOWS */
7179