1 /*
2 * hostapd / IEEE 802.11 Management
3 * Copyright (c) 2002-2014, Jouni Malinen <j@w1.fi>
4 *
5 * This software may be distributed under the terms of the BSD license.
6 * See README for more details.
7 */
8
9 #include "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/random.h"
18 #include "common/ieee802_11_defs.h"
19 #include "common/ieee802_11_common.h"
20 #include "common/wpa_ctrl.h"
21 #include "common/sae.h"
22 #include "radius/radius.h"
23 #include "radius/radius_client.h"
24 #include "p2p/p2p.h"
25 #include "wps/wps.h"
26 #include "fst/fst.h"
27 #include "hostapd.h"
28 #include "beacon.h"
29 #include "ieee802_11_auth.h"
30 #include "sta_info.h"
31 #include "ieee802_1x.h"
32 #include "wpa_auth.h"
33 #include "pmksa_cache_auth.h"
34 #include "wmm.h"
35 #include "ap_list.h"
36 #include "accounting.h"
37 #include "ap_config.h"
38 #include "ap_mlme.h"
39 #include "p2p_hostapd.h"
40 #include "ap_drv_ops.h"
41 #include "wnm_ap.h"
42 #include "hw_features.h"
43 #include "ieee802_11.h"
44 #include "dfs.h"
45 #include "mbo_ap.h"
46
47
hostapd_eid_supp_rates(struct hostapd_data * hapd,u8 * eid)48 u8 * hostapd_eid_supp_rates(struct hostapd_data *hapd, u8 *eid)
49 {
50 u8 *pos = eid;
51 int i, num, count;
52
53 if (hapd->iface->current_rates == NULL)
54 return eid;
55
56 *pos++ = WLAN_EID_SUPP_RATES;
57 num = hapd->iface->num_rates;
58 if (hapd->iconf->ieee80211n && hapd->iconf->require_ht)
59 num++;
60 if (hapd->iconf->ieee80211ac && hapd->iconf->require_vht)
61 num++;
62 if (num > 8) {
63 /* rest of the rates are encoded in Extended supported
64 * rates element */
65 num = 8;
66 }
67
68 *pos++ = num;
69 for (i = 0, count = 0; i < hapd->iface->num_rates && count < num;
70 i++) {
71 count++;
72 *pos = hapd->iface->current_rates[i].rate / 5;
73 if (hapd->iface->current_rates[i].flags & HOSTAPD_RATE_BASIC)
74 *pos |= 0x80;
75 pos++;
76 }
77
78 if (hapd->iconf->ieee80211n && hapd->iconf->require_ht && count < 8) {
79 count++;
80 *pos++ = 0x80 | BSS_MEMBERSHIP_SELECTOR_HT_PHY;
81 }
82
83 if (hapd->iconf->ieee80211ac && hapd->iconf->require_vht && count < 8) {
84 count++;
85 *pos++ = 0x80 | BSS_MEMBERSHIP_SELECTOR_VHT_PHY;
86 }
87
88 return pos;
89 }
90
91
hostapd_eid_ext_supp_rates(struct hostapd_data * hapd,u8 * eid)92 u8 * hostapd_eid_ext_supp_rates(struct hostapd_data *hapd, u8 *eid)
93 {
94 u8 *pos = eid;
95 int i, num, count;
96
97 if (hapd->iface->current_rates == NULL)
98 return eid;
99
100 num = hapd->iface->num_rates;
101 if (hapd->iconf->ieee80211n && hapd->iconf->require_ht)
102 num++;
103 if (hapd->iconf->ieee80211ac && hapd->iconf->require_vht)
104 num++;
105 if (num <= 8)
106 return eid;
107 num -= 8;
108
109 *pos++ = WLAN_EID_EXT_SUPP_RATES;
110 *pos++ = num;
111 for (i = 0, count = 0; i < hapd->iface->num_rates && count < num + 8;
112 i++) {
113 count++;
114 if (count <= 8)
115 continue; /* already in SuppRates IE */
116 *pos = hapd->iface->current_rates[i].rate / 5;
117 if (hapd->iface->current_rates[i].flags & HOSTAPD_RATE_BASIC)
118 *pos |= 0x80;
119 pos++;
120 }
121
122 if (hapd->iconf->ieee80211n && hapd->iconf->require_ht) {
123 count++;
124 if (count > 8)
125 *pos++ = 0x80 | BSS_MEMBERSHIP_SELECTOR_HT_PHY;
126 }
127
128 if (hapd->iconf->ieee80211ac && hapd->iconf->require_vht) {
129 count++;
130 if (count > 8)
131 *pos++ = 0x80 | BSS_MEMBERSHIP_SELECTOR_VHT_PHY;
132 }
133
134 return pos;
135 }
136
137
hostapd_own_capab_info(struct hostapd_data * hapd)138 u16 hostapd_own_capab_info(struct hostapd_data *hapd)
139 {
140 int capab = WLAN_CAPABILITY_ESS;
141 int privacy;
142 int dfs;
143
144 /* Check if any of configured channels require DFS */
145 dfs = hostapd_is_dfs_required(hapd->iface);
146 if (dfs < 0) {
147 wpa_printf(MSG_WARNING, "Failed to check if DFS is required; ret=%d",
148 dfs);
149 dfs = 0;
150 }
151
152 if (hapd->iface->num_sta_no_short_preamble == 0 &&
153 hapd->iconf->preamble == SHORT_PREAMBLE)
154 capab |= WLAN_CAPABILITY_SHORT_PREAMBLE;
155
156 privacy = hapd->conf->ssid.wep.keys_set;
157
158 if (hapd->conf->ieee802_1x &&
159 (hapd->conf->default_wep_key_len ||
160 hapd->conf->individual_wep_key_len))
161 privacy = 1;
162
163 if (hapd->conf->wpa)
164 privacy = 1;
165
166 #ifdef CONFIG_HS20
167 if (hapd->conf->osen)
168 privacy = 1;
169 #endif /* CONFIG_HS20 */
170
171 if (privacy)
172 capab |= WLAN_CAPABILITY_PRIVACY;
173
174 if (hapd->iface->current_mode &&
175 hapd->iface->current_mode->mode == HOSTAPD_MODE_IEEE80211G &&
176 hapd->iface->num_sta_no_short_slot_time == 0)
177 capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME;
178
179 /*
180 * Currently, Spectrum Management capability bit is set when directly
181 * requested in configuration by spectrum_mgmt_required or when AP is
182 * running on DFS channel.
183 * TODO: Also consider driver support for TPC to set Spectrum Mgmt bit
184 */
185 if (hapd->iface->current_mode &&
186 hapd->iface->current_mode->mode == HOSTAPD_MODE_IEEE80211A &&
187 (hapd->iconf->spectrum_mgmt_required || dfs))
188 capab |= WLAN_CAPABILITY_SPECTRUM_MGMT;
189
190 if (hapd->conf->radio_measurements)
191 capab |= IEEE80211_CAP_RRM;
192
193 return capab;
194 }
195
196
197 #ifndef CONFIG_NO_RC4
auth_shared_key(struct hostapd_data * hapd,struct sta_info * sta,u16 auth_transaction,const u8 * challenge,int iswep)198 static u16 auth_shared_key(struct hostapd_data *hapd, struct sta_info *sta,
199 u16 auth_transaction, const u8 *challenge,
200 int iswep)
201 {
202 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
203 HOSTAPD_LEVEL_DEBUG,
204 "authentication (shared key, transaction %d)",
205 auth_transaction);
206
207 if (auth_transaction == 1) {
208 if (!sta->challenge) {
209 /* Generate a pseudo-random challenge */
210 u8 key[8];
211
212 sta->challenge = os_zalloc(WLAN_AUTH_CHALLENGE_LEN);
213 if (sta->challenge == NULL)
214 return WLAN_STATUS_UNSPECIFIED_FAILURE;
215
216 if (os_get_random(key, sizeof(key)) < 0) {
217 os_free(sta->challenge);
218 sta->challenge = NULL;
219 return WLAN_STATUS_UNSPECIFIED_FAILURE;
220 }
221
222 rc4_skip(key, sizeof(key), 0,
223 sta->challenge, WLAN_AUTH_CHALLENGE_LEN);
224 }
225 return 0;
226 }
227
228 if (auth_transaction != 3)
229 return WLAN_STATUS_UNSPECIFIED_FAILURE;
230
231 /* Transaction 3 */
232 if (!iswep || !sta->challenge || !challenge ||
233 os_memcmp_const(sta->challenge, challenge,
234 WLAN_AUTH_CHALLENGE_LEN)) {
235 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
236 HOSTAPD_LEVEL_INFO,
237 "shared key authentication - invalid "
238 "challenge-response");
239 return WLAN_STATUS_CHALLENGE_FAIL;
240 }
241
242 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
243 HOSTAPD_LEVEL_DEBUG,
244 "authentication OK (shared key)");
245 sta->flags |= WLAN_STA_AUTH;
246 wpa_auth_sm_event(sta->wpa_sm, WPA_AUTH);
247 os_free(sta->challenge);
248 sta->challenge = NULL;
249
250 return 0;
251 }
252 #endif /* CONFIG_NO_RC4 */
253
254
send_auth_reply(struct hostapd_data * hapd,const u8 * dst,const u8 * bssid,u16 auth_alg,u16 auth_transaction,u16 resp,const u8 * ies,size_t ies_len)255 static int send_auth_reply(struct hostapd_data *hapd,
256 const u8 *dst, const u8 *bssid,
257 u16 auth_alg, u16 auth_transaction, u16 resp,
258 const u8 *ies, size_t ies_len)
259 {
260 struct ieee80211_mgmt *reply;
261 u8 *buf;
262 size_t rlen;
263 int reply_res = WLAN_STATUS_UNSPECIFIED_FAILURE;
264
265 rlen = IEEE80211_HDRLEN + sizeof(reply->u.auth) + ies_len;
266 buf = os_zalloc(rlen);
267 if (buf == NULL)
268 return -1;
269
270 reply = (struct ieee80211_mgmt *) buf;
271 reply->frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
272 WLAN_FC_STYPE_AUTH);
273 os_memcpy(reply->da, dst, ETH_ALEN);
274 os_memcpy(reply->sa, hapd->own_addr, ETH_ALEN);
275 os_memcpy(reply->bssid, bssid, ETH_ALEN);
276
277 reply->u.auth.auth_alg = host_to_le16(auth_alg);
278 reply->u.auth.auth_transaction = host_to_le16(auth_transaction);
279 reply->u.auth.status_code = host_to_le16(resp);
280
281 if (ies && ies_len)
282 os_memcpy(reply->u.auth.variable, ies, ies_len);
283
284 wpa_printf(MSG_DEBUG, "authentication reply: STA=" MACSTR
285 " auth_alg=%d auth_transaction=%d resp=%d (IE len=%lu)",
286 MAC2STR(dst), auth_alg, auth_transaction,
287 resp, (unsigned long) ies_len);
288 if (hostapd_drv_send_mlme(hapd, reply, rlen, 0) < 0)
289 wpa_printf(MSG_INFO, "send_auth_reply: send failed");
290 else
291 reply_res = WLAN_STATUS_SUCCESS;
292
293 os_free(buf);
294
295 return reply_res;
296 }
297
298
299 #ifdef CONFIG_IEEE80211R
handle_auth_ft_finish(void * ctx,const u8 * dst,const u8 * bssid,u16 auth_transaction,u16 status,const u8 * ies,size_t ies_len)300 static void handle_auth_ft_finish(void *ctx, const u8 *dst, const u8 *bssid,
301 u16 auth_transaction, u16 status,
302 const u8 *ies, size_t ies_len)
303 {
304 struct hostapd_data *hapd = ctx;
305 struct sta_info *sta;
306 int reply_res;
307
308 reply_res = send_auth_reply(hapd, dst, bssid, WLAN_AUTH_FT,
309 auth_transaction, status, ies, ies_len);
310
311 sta = ap_get_sta(hapd, dst);
312 if (sta == NULL)
313 return;
314
315 if (sta->added_unassoc && (reply_res != WLAN_STATUS_SUCCESS ||
316 status != WLAN_STATUS_SUCCESS)) {
317 hostapd_drv_sta_remove(hapd, sta->addr);
318 sta->added_unassoc = 0;
319 return;
320 }
321
322 if (status != WLAN_STATUS_SUCCESS)
323 return;
324
325 hostapd_logger(hapd, dst, HOSTAPD_MODULE_IEEE80211,
326 HOSTAPD_LEVEL_DEBUG, "authentication OK (FT)");
327 sta->flags |= WLAN_STA_AUTH;
328 mlme_authenticate_indication(hapd, sta);
329 }
330 #endif /* CONFIG_IEEE80211R */
331
332
333 #ifdef CONFIG_SAE
334
335 #define dot11RSNASAESync 5 /* attempts */
336
337
auth_build_sae_commit(struct hostapd_data * hapd,struct sta_info * sta,int update)338 static struct wpabuf * auth_build_sae_commit(struct hostapd_data *hapd,
339 struct sta_info *sta, int update)
340 {
341 struct wpabuf *buf;
342
343 if (hapd->conf->ssid.wpa_passphrase == NULL) {
344 wpa_printf(MSG_DEBUG, "SAE: No password available");
345 return NULL;
346 }
347
348 if (update &&
349 sae_prepare_commit(hapd->own_addr, sta->addr,
350 (u8 *) hapd->conf->ssid.wpa_passphrase,
351 os_strlen(hapd->conf->ssid.wpa_passphrase),
352 sta->sae) < 0) {
353 wpa_printf(MSG_DEBUG, "SAE: Could not pick PWE");
354 return NULL;
355 }
356
357 buf = wpabuf_alloc(SAE_COMMIT_MAX_LEN);
358 if (buf == NULL)
359 return NULL;
360 sae_write_commit(sta->sae, buf, sta->sae->tmp ?
361 sta->sae->tmp->anti_clogging_token : NULL);
362
363 return buf;
364 }
365
366
auth_build_sae_confirm(struct hostapd_data * hapd,struct sta_info * sta)367 static struct wpabuf * auth_build_sae_confirm(struct hostapd_data *hapd,
368 struct sta_info *sta)
369 {
370 struct wpabuf *buf;
371
372 buf = wpabuf_alloc(SAE_CONFIRM_MAX_LEN);
373 if (buf == NULL)
374 return NULL;
375
376 sae_write_confirm(sta->sae, buf);
377
378 return buf;
379 }
380
381
auth_sae_send_commit(struct hostapd_data * hapd,struct sta_info * sta,const u8 * bssid,int update)382 static int auth_sae_send_commit(struct hostapd_data *hapd,
383 struct sta_info *sta,
384 const u8 *bssid, int update)
385 {
386 struct wpabuf *data;
387 int reply_res;
388
389 data = auth_build_sae_commit(hapd, sta, update);
390 if (data == NULL)
391 return WLAN_STATUS_UNSPECIFIED_FAILURE;
392
393 reply_res = send_auth_reply(hapd, sta->addr, bssid, WLAN_AUTH_SAE, 1,
394 WLAN_STATUS_SUCCESS, wpabuf_head(data),
395 wpabuf_len(data));
396
397 wpabuf_free(data);
398
399 return reply_res;
400 }
401
402
auth_sae_send_confirm(struct hostapd_data * hapd,struct sta_info * sta,const u8 * bssid)403 static int auth_sae_send_confirm(struct hostapd_data *hapd,
404 struct sta_info *sta,
405 const u8 *bssid)
406 {
407 struct wpabuf *data;
408 int reply_res;
409
410 data = auth_build_sae_confirm(hapd, sta);
411 if (data == NULL)
412 return WLAN_STATUS_UNSPECIFIED_FAILURE;
413
414 reply_res = send_auth_reply(hapd, sta->addr, bssid, WLAN_AUTH_SAE, 2,
415 WLAN_STATUS_SUCCESS, wpabuf_head(data),
416 wpabuf_len(data));
417
418 wpabuf_free(data);
419
420 return reply_res;
421 }
422
423
use_sae_anti_clogging(struct hostapd_data * hapd)424 static int use_sae_anti_clogging(struct hostapd_data *hapd)
425 {
426 struct sta_info *sta;
427 unsigned int open = 0;
428
429 if (hapd->conf->sae_anti_clogging_threshold == 0)
430 return 1;
431
432 for (sta = hapd->sta_list; sta; sta = sta->next) {
433 if (!sta->sae)
434 continue;
435 if (sta->sae->state != SAE_COMMITTED &&
436 sta->sae->state != SAE_CONFIRMED)
437 continue;
438 open++;
439 if (open >= hapd->conf->sae_anti_clogging_threshold)
440 return 1;
441 }
442
443 return 0;
444 }
445
446
check_sae_token(struct hostapd_data * hapd,const u8 * addr,const u8 * token,size_t token_len)447 static int check_sae_token(struct hostapd_data *hapd, const u8 *addr,
448 const u8 *token, size_t token_len)
449 {
450 u8 mac[SHA256_MAC_LEN];
451
452 if (token_len != SHA256_MAC_LEN)
453 return -1;
454 if (hmac_sha256(hapd->sae_token_key, sizeof(hapd->sae_token_key),
455 addr, ETH_ALEN, mac) < 0 ||
456 os_memcmp_const(token, mac, SHA256_MAC_LEN) != 0)
457 return -1;
458
459 return 0;
460 }
461
462
auth_build_token_req(struct hostapd_data * hapd,int group,const u8 * addr)463 static struct wpabuf * auth_build_token_req(struct hostapd_data *hapd,
464 int group, const u8 *addr)
465 {
466 struct wpabuf *buf;
467 u8 *token;
468 struct os_reltime now;
469
470 os_get_reltime(&now);
471 if (!os_reltime_initialized(&hapd->last_sae_token_key_update) ||
472 os_reltime_expired(&now, &hapd->last_sae_token_key_update, 60)) {
473 if (random_get_bytes(hapd->sae_token_key,
474 sizeof(hapd->sae_token_key)) < 0)
475 return NULL;
476 wpa_hexdump(MSG_DEBUG, "SAE: Updated token key",
477 hapd->sae_token_key, sizeof(hapd->sae_token_key));
478 hapd->last_sae_token_key_update = now;
479 }
480
481 buf = wpabuf_alloc(sizeof(le16) + SHA256_MAC_LEN);
482 if (buf == NULL)
483 return NULL;
484
485 wpabuf_put_le16(buf, group); /* Finite Cyclic Group */
486
487 token = wpabuf_put(buf, SHA256_MAC_LEN);
488 hmac_sha256(hapd->sae_token_key, sizeof(hapd->sae_token_key),
489 addr, ETH_ALEN, token);
490
491 return buf;
492 }
493
494
sae_check_big_sync(struct sta_info * sta)495 static int sae_check_big_sync(struct sta_info *sta)
496 {
497 if (sta->sae->sync > dot11RSNASAESync) {
498 sta->sae->state = SAE_NOTHING;
499 sta->sae->sync = 0;
500 return -1;
501 }
502 return 0;
503 }
504
505
auth_sae_retransmit_timer(void * eloop_ctx,void * eloop_data)506 static void auth_sae_retransmit_timer(void *eloop_ctx, void *eloop_data)
507 {
508 struct hostapd_data *hapd = eloop_ctx;
509 struct sta_info *sta = eloop_data;
510 int ret;
511
512 if (sae_check_big_sync(sta))
513 return;
514 sta->sae->sync++;
515
516 switch (sta->sae->state) {
517 case SAE_COMMITTED:
518 ret = auth_sae_send_commit(hapd, sta, hapd->own_addr, 0);
519 eloop_register_timeout(0,
520 hapd->dot11RSNASAERetransPeriod * 1000,
521 auth_sae_retransmit_timer, hapd, sta);
522 break;
523 case SAE_CONFIRMED:
524 ret = auth_sae_send_confirm(hapd, sta, hapd->own_addr);
525 eloop_register_timeout(0,
526 hapd->dot11RSNASAERetransPeriod * 1000,
527 auth_sae_retransmit_timer, hapd, sta);
528 break;
529 default:
530 ret = -1;
531 break;
532 }
533
534 if (ret != WLAN_STATUS_SUCCESS)
535 wpa_printf(MSG_INFO, "SAE: Failed to retransmit: ret=%d", ret);
536 }
537
538
sae_clear_retransmit_timer(struct hostapd_data * hapd,struct sta_info * sta)539 void sae_clear_retransmit_timer(struct hostapd_data *hapd, struct sta_info *sta)
540 {
541 eloop_cancel_timeout(auth_sae_retransmit_timer, hapd, sta);
542 }
543
544
sae_set_retransmit_timer(struct hostapd_data * hapd,struct sta_info * sta)545 static void sae_set_retransmit_timer(struct hostapd_data *hapd,
546 struct sta_info *sta)
547 {
548 if (!(hapd->conf->mesh & MESH_ENABLED))
549 return;
550
551 eloop_cancel_timeout(auth_sae_retransmit_timer, hapd, sta);
552 eloop_register_timeout(0, hapd->dot11RSNASAERetransPeriod * 1000,
553 auth_sae_retransmit_timer, hapd, sta);
554 }
555
556
sae_accept_sta(struct hostapd_data * hapd,struct sta_info * sta)557 void sae_accept_sta(struct hostapd_data *hapd, struct sta_info *sta)
558 {
559 sta->flags |= WLAN_STA_AUTH;
560 sta->auth_alg = WLAN_AUTH_SAE;
561 mlme_authenticate_indication(hapd, sta);
562 wpa_auth_sm_event(sta->wpa_sm, WPA_AUTH);
563 sta->sae->state = SAE_ACCEPTED;
564 wpa_auth_pmksa_add_sae(hapd->wpa_auth, sta->addr,
565 sta->sae->pmk, sta->sae->pmkid);
566 }
567
568
sae_sm_step(struct hostapd_data * hapd,struct sta_info * sta,const u8 * bssid,u8 auth_transaction)569 static int sae_sm_step(struct hostapd_data *hapd, struct sta_info *sta,
570 const u8 *bssid, u8 auth_transaction)
571 {
572 int ret;
573
574 if (auth_transaction != 1 && auth_transaction != 2)
575 return WLAN_STATUS_UNSPECIFIED_FAILURE;
576
577 switch (sta->sae->state) {
578 case SAE_NOTHING:
579 if (auth_transaction == 1) {
580 ret = auth_sae_send_commit(hapd, sta, bssid, 1);
581 if (ret)
582 return ret;
583 sta->sae->state = SAE_COMMITTED;
584
585 if (sae_process_commit(sta->sae) < 0)
586 return WLAN_STATUS_UNSPECIFIED_FAILURE;
587
588 /*
589 * In mesh case, both Commit and Confirm can be sent
590 * immediately. In infrastructure BSS, only a single
591 * Authentication frame (Commit) is expected from the AP
592 * here and the second one (Confirm) will be sent once
593 * the STA has sent its second Authentication frame
594 * (Confirm).
595 */
596 if (hapd->conf->mesh & MESH_ENABLED) {
597 /*
598 * Send both Commit and Confirm immediately
599 * based on SAE finite state machine
600 * Nothing -> Confirm transition.
601 */
602 ret = auth_sae_send_confirm(hapd, sta, bssid);
603 if (ret)
604 return ret;
605 sta->sae->state = SAE_CONFIRMED;
606 } else {
607 /*
608 * For infrastructure BSS, send only the Commit
609 * message now to get alternating sequence of
610 * Authentication frames between the AP and STA.
611 * Confirm will be sent in
612 * Commited -> Confirmed/Accepted transition
613 * when receiving Confirm from STA.
614 */
615 }
616 sta->sae->sync = 0;
617 sae_set_retransmit_timer(hapd, sta);
618 } else {
619 hostapd_logger(hapd, sta->addr,
620 HOSTAPD_MODULE_IEEE80211,
621 HOSTAPD_LEVEL_DEBUG,
622 "SAE confirm before commit");
623 }
624 break;
625 case SAE_COMMITTED:
626 sae_clear_retransmit_timer(hapd, sta);
627 if (auth_transaction == 1) {
628 if (sae_process_commit(sta->sae) < 0)
629 return WLAN_STATUS_UNSPECIFIED_FAILURE;
630
631 ret = auth_sae_send_confirm(hapd, sta, bssid);
632 if (ret)
633 return ret;
634 sta->sae->state = SAE_CONFIRMED;
635 sta->sae->sync = 0;
636 sae_set_retransmit_timer(hapd, sta);
637 } else if (hapd->conf->mesh & MESH_ENABLED) {
638 /*
639 * In mesh case, follow SAE finite state machine and
640 * send Commit now, if sync count allows.
641 */
642 if (sae_check_big_sync(sta))
643 return WLAN_STATUS_SUCCESS;
644 sta->sae->sync++;
645
646 ret = auth_sae_send_commit(hapd, sta, bssid, 0);
647 if (ret)
648 return ret;
649
650 sae_set_retransmit_timer(hapd, sta);
651 } else {
652 /*
653 * For instructure BSS, send the postponed Confirm from
654 * Nothing -> Confirmed transition that was reduced to
655 * Nothing -> Committed above.
656 */
657 ret = auth_sae_send_confirm(hapd, sta, bssid);
658 if (ret)
659 return ret;
660
661 sta->sae->state = SAE_CONFIRMED;
662
663 /*
664 * Since this was triggered on Confirm RX, run another
665 * step to get to Accepted without waiting for
666 * additional events.
667 */
668 return sae_sm_step(hapd, sta, bssid, auth_transaction);
669 }
670 break;
671 case SAE_CONFIRMED:
672 sae_clear_retransmit_timer(hapd, sta);
673 if (auth_transaction == 1) {
674 if (sae_check_big_sync(sta))
675 return WLAN_STATUS_SUCCESS;
676 sta->sae->sync++;
677
678 ret = auth_sae_send_commit(hapd, sta, bssid, 1);
679 if (ret)
680 return ret;
681
682 if (sae_process_commit(sta->sae) < 0)
683 return WLAN_STATUS_UNSPECIFIED_FAILURE;
684
685 ret = auth_sae_send_confirm(hapd, sta, bssid);
686 if (ret)
687 return ret;
688
689 sae_set_retransmit_timer(hapd, sta);
690 } else {
691 sae_accept_sta(hapd, sta);
692 }
693 break;
694 case SAE_ACCEPTED:
695 if (auth_transaction == 1) {
696 wpa_printf(MSG_DEBUG, "SAE: remove the STA (" MACSTR
697 ") doing reauthentication",
698 MAC2STR(sta->addr));
699 ap_free_sta(hapd, sta);
700 wpa_auth_pmksa_remove(hapd->wpa_auth, sta->addr);
701 } else {
702 if (sae_check_big_sync(sta))
703 return WLAN_STATUS_SUCCESS;
704 sta->sae->sync++;
705
706 ret = auth_sae_send_confirm(hapd, sta, bssid);
707 sae_clear_temp_data(sta->sae);
708 if (ret)
709 return ret;
710 }
711 break;
712 default:
713 wpa_printf(MSG_ERROR, "SAE: invalid state %d",
714 sta->sae->state);
715 return WLAN_STATUS_UNSPECIFIED_FAILURE;
716 }
717 return WLAN_STATUS_SUCCESS;
718 }
719
720
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)721 static void handle_auth_sae(struct hostapd_data *hapd, struct sta_info *sta,
722 const struct ieee80211_mgmt *mgmt, size_t len,
723 u16 auth_transaction, u16 status_code)
724 {
725 int resp = WLAN_STATUS_SUCCESS;
726 struct wpabuf *data = NULL;
727
728 if (!sta->sae) {
729 if (auth_transaction != 1 ||
730 status_code != WLAN_STATUS_SUCCESS) {
731 resp = -1;
732 goto remove_sta;
733 }
734 sta->sae = os_zalloc(sizeof(*sta->sae));
735 if (!sta->sae) {
736 resp = -1;
737 goto remove_sta;
738 }
739 sta->sae->state = SAE_NOTHING;
740 sta->sae->sync = 0;
741 }
742
743 if (sta->mesh_sae_pmksa_caching) {
744 wpa_printf(MSG_DEBUG,
745 "SAE: Cancel use of mesh PMKSA caching because peer starts SAE authentication");
746 wpa_auth_pmksa_remove(hapd->wpa_auth, sta->addr);
747 sta->mesh_sae_pmksa_caching = 0;
748 }
749
750 if (auth_transaction == 1) {
751 const u8 *token = NULL, *pos, *end;
752 size_t token_len = 0;
753 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
754 HOSTAPD_LEVEL_DEBUG,
755 "start SAE authentication (RX commit, status=%u)",
756 status_code);
757
758 if ((hapd->conf->mesh & MESH_ENABLED) &&
759 status_code == WLAN_STATUS_ANTI_CLOGGING_TOKEN_REQ &&
760 sta->sae->tmp) {
761 pos = mgmt->u.auth.variable;
762 end = ((const u8 *) mgmt) + len;
763 if (pos + sizeof(le16) > end) {
764 wpa_printf(MSG_ERROR,
765 "SAE: Too short anti-clogging token request");
766 resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
767 goto reply;
768 }
769 resp = sae_group_allowed(sta->sae,
770 hapd->conf->sae_groups,
771 WPA_GET_LE16(pos));
772 if (resp != WLAN_STATUS_SUCCESS) {
773 wpa_printf(MSG_ERROR,
774 "SAE: Invalid group in anti-clogging token request");
775 goto reply;
776 }
777 pos += sizeof(le16);
778
779 wpabuf_free(sta->sae->tmp->anti_clogging_token);
780 sta->sae->tmp->anti_clogging_token =
781 wpabuf_alloc_copy(pos, end - pos);
782 if (sta->sae->tmp->anti_clogging_token == NULL) {
783 wpa_printf(MSG_ERROR,
784 "SAE: Failed to alloc for anti-clogging token");
785 resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
786 goto remove_sta;
787 }
788
789 /*
790 * IEEE Std 802.11-2012, 11.3.8.6.4: If the Status code
791 * is 76, a new Commit Message shall be constructed
792 * with the Anti-Clogging Token from the received
793 * Authentication frame, and the commit-scalar and
794 * COMMIT-ELEMENT previously sent.
795 */
796 resp = auth_sae_send_commit(hapd, sta, mgmt->bssid, 0);
797 if (resp != WLAN_STATUS_SUCCESS) {
798 wpa_printf(MSG_ERROR,
799 "SAE: Failed to send commit message");
800 goto remove_sta;
801 }
802 sta->sae->state = SAE_COMMITTED;
803 sta->sae->sync = 0;
804 sae_set_retransmit_timer(hapd, sta);
805 return;
806 }
807
808 if (status_code != WLAN_STATUS_SUCCESS)
809 goto remove_sta;
810
811 resp = sae_parse_commit(sta->sae, mgmt->u.auth.variable,
812 ((const u8 *) mgmt) + len -
813 mgmt->u.auth.variable, &token,
814 &token_len, hapd->conf->sae_groups);
815 if (resp == SAE_SILENTLY_DISCARD) {
816 wpa_printf(MSG_DEBUG,
817 "SAE: Drop commit message from " MACSTR " due to reflection attack",
818 MAC2STR(sta->addr));
819 goto remove_sta;
820 }
821 if (token && check_sae_token(hapd, sta->addr, token, token_len)
822 < 0) {
823 wpa_printf(MSG_DEBUG, "SAE: Drop commit message with "
824 "incorrect token from " MACSTR,
825 MAC2STR(sta->addr));
826 resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
827 goto remove_sta;
828 }
829
830 if (resp != WLAN_STATUS_SUCCESS)
831 goto reply;
832
833 if (!token && use_sae_anti_clogging(hapd)) {
834 wpa_printf(MSG_DEBUG,
835 "SAE: Request anti-clogging token from "
836 MACSTR, MAC2STR(sta->addr));
837 data = auth_build_token_req(hapd, sta->sae->group,
838 sta->addr);
839 resp = WLAN_STATUS_ANTI_CLOGGING_TOKEN_REQ;
840 if (hapd->conf->mesh & MESH_ENABLED)
841 sta->sae->state = SAE_NOTHING;
842 goto reply;
843 }
844
845 resp = sae_sm_step(hapd, sta, mgmt->bssid, auth_transaction);
846 } else if (auth_transaction == 2) {
847 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
848 HOSTAPD_LEVEL_DEBUG,
849 "SAE authentication (RX confirm, status=%u)",
850 status_code);
851 if (status_code != WLAN_STATUS_SUCCESS)
852 goto remove_sta;
853 if (sta->sae->state >= SAE_CONFIRMED ||
854 !(hapd->conf->mesh & MESH_ENABLED)) {
855 if (sae_check_confirm(sta->sae, mgmt->u.auth.variable,
856 ((u8 *) mgmt) + len -
857 mgmt->u.auth.variable) < 0) {
858 resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
859 goto reply;
860 }
861 }
862 resp = sae_sm_step(hapd, sta, mgmt->bssid, auth_transaction);
863 } else {
864 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
865 HOSTAPD_LEVEL_DEBUG,
866 "unexpected SAE authentication transaction %u (status=%u)",
867 auth_transaction, status_code);
868 if (status_code != WLAN_STATUS_SUCCESS)
869 goto remove_sta;
870 resp = WLAN_STATUS_UNKNOWN_AUTH_TRANSACTION;
871 }
872
873 reply:
874 if (resp != WLAN_STATUS_SUCCESS) {
875 send_auth_reply(hapd, mgmt->sa, mgmt->bssid, WLAN_AUTH_SAE,
876 auth_transaction, resp,
877 data ? wpabuf_head(data) : (u8 *) "",
878 data ? wpabuf_len(data) : 0);
879 }
880
881 remove_sta:
882 if (sta->added_unassoc && (resp != WLAN_STATUS_SUCCESS ||
883 status_code != WLAN_STATUS_SUCCESS)) {
884 hostapd_drv_sta_remove(hapd, sta->addr);
885 sta->added_unassoc = 0;
886 }
887 wpabuf_free(data);
888 }
889
890
891 /**
892 * auth_sae_init_committed - Send COMMIT and start SAE in committed state
893 * @hapd: BSS data for the device initiating the authentication
894 * @sta: the peer to which commit authentication frame is sent
895 *
896 * This function implements Init event handling (IEEE Std 802.11-2012,
897 * 11.3.8.6.3) in which initial COMMIT message is sent. Prior to calling, the
898 * sta->sae structure should be initialized appropriately via a call to
899 * sae_prepare_commit().
900 */
auth_sae_init_committed(struct hostapd_data * hapd,struct sta_info * sta)901 int auth_sae_init_committed(struct hostapd_data *hapd, struct sta_info *sta)
902 {
903 int ret;
904
905 if (!sta->sae || !sta->sae->tmp)
906 return -1;
907
908 if (sta->sae->state != SAE_NOTHING)
909 return -1;
910
911 ret = auth_sae_send_commit(hapd, sta, hapd->own_addr, 0);
912 if (ret)
913 return -1;
914
915 sta->sae->state = SAE_COMMITTED;
916 sta->sae->sync = 0;
917 sae_set_retransmit_timer(hapd, sta);
918
919 return 0;
920 }
921
922 #endif /* CONFIG_SAE */
923
924
handle_auth(struct hostapd_data * hapd,const struct ieee80211_mgmt * mgmt,size_t len)925 static void handle_auth(struct hostapd_data *hapd,
926 const struct ieee80211_mgmt *mgmt, size_t len)
927 {
928 u16 auth_alg, auth_transaction, status_code;
929 u16 resp = WLAN_STATUS_SUCCESS;
930 struct sta_info *sta = NULL;
931 int res, reply_res;
932 u16 fc;
933 const u8 *challenge = NULL;
934 u32 session_timeout, acct_interim_interval;
935 struct vlan_description vlan_id;
936 struct hostapd_sta_wpa_psk_short *psk = NULL;
937 u8 resp_ies[2 + WLAN_AUTH_CHALLENGE_LEN];
938 size_t resp_ies_len = 0;
939 char *identity = NULL;
940 char *radius_cui = NULL;
941 u16 seq_ctrl;
942
943 os_memset(&vlan_id, 0, sizeof(vlan_id));
944
945 if (len < IEEE80211_HDRLEN + sizeof(mgmt->u.auth)) {
946 wpa_printf(MSG_INFO, "handle_auth - too short payload (len=%lu)",
947 (unsigned long) len);
948 return;
949 }
950
951 #ifdef CONFIG_TESTING_OPTIONS
952 if (hapd->iconf->ignore_auth_probability > 0.0 &&
953 drand48() < hapd->iconf->ignore_auth_probability) {
954 wpa_printf(MSG_INFO,
955 "TESTING: ignoring auth frame from " MACSTR,
956 MAC2STR(mgmt->sa));
957 return;
958 }
959 #endif /* CONFIG_TESTING_OPTIONS */
960
961 auth_alg = le_to_host16(mgmt->u.auth.auth_alg);
962 auth_transaction = le_to_host16(mgmt->u.auth.auth_transaction);
963 status_code = le_to_host16(mgmt->u.auth.status_code);
964 fc = le_to_host16(mgmt->frame_control);
965 seq_ctrl = le_to_host16(mgmt->seq_ctrl);
966
967 if (len >= IEEE80211_HDRLEN + sizeof(mgmt->u.auth) +
968 2 + WLAN_AUTH_CHALLENGE_LEN &&
969 mgmt->u.auth.variable[0] == WLAN_EID_CHALLENGE &&
970 mgmt->u.auth.variable[1] == WLAN_AUTH_CHALLENGE_LEN)
971 challenge = &mgmt->u.auth.variable[2];
972
973 wpa_printf(MSG_DEBUG, "authentication: STA=" MACSTR " auth_alg=%d "
974 "auth_transaction=%d status_code=%d wep=%d%s "
975 "seq_ctrl=0x%x%s",
976 MAC2STR(mgmt->sa), auth_alg, auth_transaction,
977 status_code, !!(fc & WLAN_FC_ISWEP),
978 challenge ? " challenge" : "",
979 seq_ctrl, (fc & WLAN_FC_RETRY) ? " retry" : "");
980
981 #ifdef CONFIG_NO_RC4
982 if (auth_alg == WLAN_AUTH_SHARED_KEY) {
983 wpa_printf(MSG_INFO,
984 "Unsupported authentication algorithm (%d)",
985 auth_alg);
986 resp = WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG;
987 goto fail;
988 }
989 #endif /* CONFIG_NO_RC4 */
990
991 if (hapd->tkip_countermeasures) {
992 resp = WLAN_REASON_MICHAEL_MIC_FAILURE;
993 goto fail;
994 }
995
996 if (!(((hapd->conf->auth_algs & WPA_AUTH_ALG_OPEN) &&
997 auth_alg == WLAN_AUTH_OPEN) ||
998 #ifdef CONFIG_IEEE80211R
999 (hapd->conf->wpa && wpa_key_mgmt_ft(hapd->conf->wpa_key_mgmt) &&
1000 auth_alg == WLAN_AUTH_FT) ||
1001 #endif /* CONFIG_IEEE80211R */
1002 #ifdef CONFIG_SAE
1003 (hapd->conf->wpa && wpa_key_mgmt_sae(hapd->conf->wpa_key_mgmt) &&
1004 auth_alg == WLAN_AUTH_SAE) ||
1005 #endif /* CONFIG_SAE */
1006 ((hapd->conf->auth_algs & WPA_AUTH_ALG_SHARED) &&
1007 auth_alg == WLAN_AUTH_SHARED_KEY))) {
1008 wpa_printf(MSG_INFO, "Unsupported authentication algorithm (%d)",
1009 auth_alg);
1010 resp = WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG;
1011 goto fail;
1012 }
1013
1014 if (!(auth_transaction == 1 || auth_alg == WLAN_AUTH_SAE ||
1015 (auth_alg == WLAN_AUTH_SHARED_KEY && auth_transaction == 3))) {
1016 wpa_printf(MSG_INFO, "Unknown authentication transaction number (%d)",
1017 auth_transaction);
1018 resp = WLAN_STATUS_UNKNOWN_AUTH_TRANSACTION;
1019 goto fail;
1020 }
1021
1022 if (os_memcmp(mgmt->sa, hapd->own_addr, ETH_ALEN) == 0) {
1023 wpa_printf(MSG_INFO, "Station " MACSTR " not allowed to authenticate",
1024 MAC2STR(mgmt->sa));
1025 resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
1026 goto fail;
1027 }
1028
1029 if (hapd->conf->no_auth_if_seen_on) {
1030 struct hostapd_data *other;
1031
1032 other = sta_track_seen_on(hapd->iface, mgmt->sa,
1033 hapd->conf->no_auth_if_seen_on);
1034 if (other) {
1035 u8 *pos;
1036 u32 info;
1037 u8 op_class, channel, phytype;
1038
1039 wpa_printf(MSG_DEBUG, "%s: Reject authentication from "
1040 MACSTR " since STA has been seen on %s",
1041 hapd->conf->iface, MAC2STR(mgmt->sa),
1042 hapd->conf->no_auth_if_seen_on);
1043
1044 resp = WLAN_STATUS_REJECTED_WITH_SUGGESTED_BSS_TRANSITION;
1045 pos = &resp_ies[0];
1046 *pos++ = WLAN_EID_NEIGHBOR_REPORT;
1047 *pos++ = 13;
1048 os_memcpy(pos, other->own_addr, ETH_ALEN);
1049 pos += ETH_ALEN;
1050 info = 0; /* TODO: BSSID Information */
1051 WPA_PUT_LE32(pos, info);
1052 pos += 4;
1053 if (other->iconf->hw_mode == HOSTAPD_MODE_IEEE80211AD)
1054 phytype = 8; /* dmg */
1055 else if (other->iconf->ieee80211ac)
1056 phytype = 9; /* vht */
1057 else if (other->iconf->ieee80211n)
1058 phytype = 7; /* ht */
1059 else if (other->iconf->hw_mode ==
1060 HOSTAPD_MODE_IEEE80211A)
1061 phytype = 4; /* ofdm */
1062 else if (other->iconf->hw_mode ==
1063 HOSTAPD_MODE_IEEE80211G)
1064 phytype = 6; /* erp */
1065 else
1066 phytype = 5; /* hrdsss */
1067 if (ieee80211_freq_to_channel_ext(
1068 hostapd_hw_get_freq(other,
1069 other->iconf->channel),
1070 other->iconf->secondary_channel,
1071 other->iconf->ieee80211ac,
1072 &op_class, &channel) == NUM_HOSTAPD_MODES) {
1073 op_class = 0;
1074 channel = other->iconf->channel;
1075 }
1076 *pos++ = op_class;
1077 *pos++ = channel;
1078 *pos++ = phytype;
1079 resp_ies_len = pos - &resp_ies[0];
1080 goto fail;
1081 }
1082 }
1083
1084 res = hostapd_allowed_address(hapd, mgmt->sa, (u8 *) mgmt, len,
1085 &session_timeout,
1086 &acct_interim_interval, &vlan_id,
1087 &psk, &identity, &radius_cui);
1088
1089 if (res == HOSTAPD_ACL_REJECT) {
1090 wpa_printf(MSG_INFO, "Station " MACSTR " not allowed to authenticate",
1091 MAC2STR(mgmt->sa));
1092 resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
1093 goto fail;
1094 }
1095 if (res == HOSTAPD_ACL_PENDING) {
1096 wpa_printf(MSG_DEBUG, "Authentication frame from " MACSTR
1097 " waiting for an external authentication",
1098 MAC2STR(mgmt->sa));
1099 /* Authentication code will re-send the authentication frame
1100 * after it has received (and cached) information from the
1101 * external source. */
1102 return;
1103 }
1104
1105 sta = ap_get_sta(hapd, mgmt->sa);
1106 if (sta) {
1107 if ((fc & WLAN_FC_RETRY) &&
1108 sta->last_seq_ctrl != WLAN_INVALID_MGMT_SEQ &&
1109 sta->last_seq_ctrl == seq_ctrl &&
1110 sta->last_subtype == WLAN_FC_STYPE_AUTH) {
1111 hostapd_logger(hapd, sta->addr,
1112 HOSTAPD_MODULE_IEEE80211,
1113 HOSTAPD_LEVEL_DEBUG,
1114 "Drop repeated authentication frame seq_ctrl=0x%x",
1115 seq_ctrl);
1116 return;
1117 }
1118 #ifdef CONFIG_MESH
1119 if ((hapd->conf->mesh & MESH_ENABLED) &&
1120 sta->plink_state == PLINK_BLOCKED) {
1121 wpa_printf(MSG_DEBUG, "Mesh peer " MACSTR
1122 " is blocked - drop Authentication frame",
1123 MAC2STR(mgmt->sa));
1124 return;
1125 }
1126 #endif /* CONFIG_MESH */
1127 } else {
1128 #ifdef CONFIG_MESH
1129 if (hapd->conf->mesh & MESH_ENABLED) {
1130 /* if the mesh peer is not available, we don't do auth.
1131 */
1132 wpa_printf(MSG_DEBUG, "Mesh peer " MACSTR
1133 " not yet known - drop Authentication frame",
1134 MAC2STR(mgmt->sa));
1135 /*
1136 * Save a copy of the frame so that it can be processed
1137 * if a new peer entry is added shortly after this.
1138 */
1139 wpabuf_free(hapd->mesh_pending_auth);
1140 hapd->mesh_pending_auth = wpabuf_alloc_copy(mgmt, len);
1141 os_get_reltime(&hapd->mesh_pending_auth_time);
1142 return;
1143 }
1144 #endif /* CONFIG_MESH */
1145
1146 sta = ap_sta_add(hapd, mgmt->sa);
1147 if (!sta) {
1148 resp = WLAN_STATUS_AP_UNABLE_TO_HANDLE_NEW_STA;
1149 goto fail;
1150 }
1151 }
1152 sta->last_seq_ctrl = seq_ctrl;
1153 sta->last_subtype = WLAN_FC_STYPE_AUTH;
1154
1155 if (vlan_id.notempty &&
1156 !hostapd_vlan_valid(hapd->conf->vlan, &vlan_id)) {
1157 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_RADIUS,
1158 HOSTAPD_LEVEL_INFO,
1159 "Invalid VLAN %d%s received from RADIUS server",
1160 vlan_id.untagged,
1161 vlan_id.tagged[0] ? "+" : "");
1162 resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
1163 goto fail;
1164 }
1165 if (ap_sta_set_vlan(hapd, sta, &vlan_id) < 0) {
1166 resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
1167 goto fail;
1168 }
1169 if (sta->vlan_id)
1170 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_RADIUS,
1171 HOSTAPD_LEVEL_INFO, "VLAN ID %d", sta->vlan_id);
1172
1173 hostapd_free_psk_list(sta->psk);
1174 if (hapd->conf->wpa_psk_radius != PSK_RADIUS_IGNORED) {
1175 sta->psk = psk;
1176 psk = NULL;
1177 } else {
1178 sta->psk = NULL;
1179 }
1180
1181 sta->identity = identity;
1182 identity = NULL;
1183 sta->radius_cui = radius_cui;
1184 radius_cui = NULL;
1185
1186 sta->flags &= ~WLAN_STA_PREAUTH;
1187 ieee802_1x_notify_pre_auth(sta->eapol_sm, 0);
1188
1189 if (hapd->conf->acct_interim_interval == 0 && acct_interim_interval)
1190 sta->acct_interim_interval = acct_interim_interval;
1191 if (res == HOSTAPD_ACL_ACCEPT_TIMEOUT)
1192 ap_sta_session_timeout(hapd, sta, session_timeout);
1193 else
1194 ap_sta_no_session_timeout(hapd, sta);
1195
1196 /*
1197 * If the driver supports full AP client state, add a station to the
1198 * driver before sending authentication reply to make sure the driver
1199 * has resources, and not to go through the entire authentication and
1200 * association handshake, and fail it at the end.
1201 *
1202 * If this is not the first transaction, in a multi-step authentication
1203 * algorithm, the station already exists in the driver
1204 * (sta->added_unassoc = 1) so skip it.
1205 *
1206 * In mesh mode, the station was already added to the driver when the
1207 * NEW_PEER_CANDIDATE event is received.
1208 */
1209 if (FULL_AP_CLIENT_STATE_SUPP(hapd->iface->drv_flags) &&
1210 !(hapd->conf->mesh & MESH_ENABLED) &&
1211 !(sta->added_unassoc)) {
1212 /*
1213 * If a station that is already associated to the AP, is trying
1214 * to authenticate again, remove the STA entry, in order to make
1215 * sure the STA PS state gets cleared and configuration gets
1216 * updated. To handle this, station's added_unassoc flag is
1217 * cleared once the station has completed association.
1218 */
1219 hostapd_drv_sta_remove(hapd, sta->addr);
1220 sta->flags &= ~(WLAN_STA_ASSOC | WLAN_STA_AUTH |
1221 WLAN_STA_AUTHORIZED);
1222
1223 if (hostapd_sta_add(hapd, sta->addr, 0, 0, 0, 0, 0,
1224 NULL, NULL, sta->flags, 0, 0, 0)) {
1225 hostapd_logger(hapd, sta->addr,
1226 HOSTAPD_MODULE_IEEE80211,
1227 HOSTAPD_LEVEL_NOTICE,
1228 "Could not add STA to kernel driver");
1229 resp = WLAN_STATUS_AP_UNABLE_TO_HANDLE_NEW_STA;
1230 goto fail;
1231 }
1232
1233 sta->added_unassoc = 1;
1234 }
1235
1236 switch (auth_alg) {
1237 case WLAN_AUTH_OPEN:
1238 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
1239 HOSTAPD_LEVEL_DEBUG,
1240 "authentication OK (open system)");
1241 sta->flags |= WLAN_STA_AUTH;
1242 wpa_auth_sm_event(sta->wpa_sm, WPA_AUTH);
1243 sta->auth_alg = WLAN_AUTH_OPEN;
1244 mlme_authenticate_indication(hapd, sta);
1245 break;
1246 #ifndef CONFIG_NO_RC4
1247 case WLAN_AUTH_SHARED_KEY:
1248 resp = auth_shared_key(hapd, sta, auth_transaction, challenge,
1249 fc & WLAN_FC_ISWEP);
1250 sta->auth_alg = WLAN_AUTH_SHARED_KEY;
1251 mlme_authenticate_indication(hapd, sta);
1252 if (sta->challenge && auth_transaction == 1) {
1253 resp_ies[0] = WLAN_EID_CHALLENGE;
1254 resp_ies[1] = WLAN_AUTH_CHALLENGE_LEN;
1255 os_memcpy(resp_ies + 2, sta->challenge,
1256 WLAN_AUTH_CHALLENGE_LEN);
1257 resp_ies_len = 2 + WLAN_AUTH_CHALLENGE_LEN;
1258 }
1259 break;
1260 #endif /* CONFIG_NO_RC4 */
1261 #ifdef CONFIG_IEEE80211R
1262 case WLAN_AUTH_FT:
1263 sta->auth_alg = WLAN_AUTH_FT;
1264 if (sta->wpa_sm == NULL)
1265 sta->wpa_sm = wpa_auth_sta_init(hapd->wpa_auth,
1266 sta->addr, NULL);
1267 if (sta->wpa_sm == NULL) {
1268 wpa_printf(MSG_DEBUG, "FT: Failed to initialize WPA "
1269 "state machine");
1270 resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
1271 goto fail;
1272 }
1273 wpa_ft_process_auth(sta->wpa_sm, mgmt->bssid,
1274 auth_transaction, mgmt->u.auth.variable,
1275 len - IEEE80211_HDRLEN -
1276 sizeof(mgmt->u.auth),
1277 handle_auth_ft_finish, hapd);
1278 /* handle_auth_ft_finish() callback will complete auth. */
1279 return;
1280 #endif /* CONFIG_IEEE80211R */
1281 #ifdef CONFIG_SAE
1282 case WLAN_AUTH_SAE:
1283 #ifdef CONFIG_MESH
1284 if (status_code == WLAN_STATUS_SUCCESS &&
1285 hapd->conf->mesh & MESH_ENABLED) {
1286 if (sta->wpa_sm == NULL)
1287 sta->wpa_sm =
1288 wpa_auth_sta_init(hapd->wpa_auth,
1289 sta->addr, NULL);
1290 if (sta->wpa_sm == NULL) {
1291 wpa_printf(MSG_DEBUG,
1292 "SAE: Failed to initialize WPA state machine");
1293 resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
1294 goto fail;
1295 }
1296 }
1297 #endif /* CONFIG_MESH */
1298 handle_auth_sae(hapd, sta, mgmt, len, auth_transaction,
1299 status_code);
1300 return;
1301 #endif /* CONFIG_SAE */
1302 }
1303
1304 fail:
1305 os_free(identity);
1306 os_free(radius_cui);
1307 hostapd_free_psk_list(psk);
1308
1309 reply_res = send_auth_reply(hapd, mgmt->sa, mgmt->bssid, auth_alg,
1310 auth_transaction + 1, resp, resp_ies,
1311 resp_ies_len);
1312
1313 if (sta && sta->added_unassoc && (resp != WLAN_STATUS_SUCCESS ||
1314 reply_res != WLAN_STATUS_SUCCESS)) {
1315 hostapd_drv_sta_remove(hapd, sta->addr);
1316 sta->added_unassoc = 0;
1317 }
1318 }
1319
1320
hostapd_get_aid(struct hostapd_data * hapd,struct sta_info * sta)1321 int hostapd_get_aid(struct hostapd_data *hapd, struct sta_info *sta)
1322 {
1323 int i, j = 32, aid;
1324
1325 /* get a unique AID */
1326 if (sta->aid > 0) {
1327 wpa_printf(MSG_DEBUG, " old AID %d", sta->aid);
1328 return 0;
1329 }
1330
1331 for (i = 0; i < AID_WORDS; i++) {
1332 if (hapd->sta_aid[i] == (u32) -1)
1333 continue;
1334 for (j = 0; j < 32; j++) {
1335 if (!(hapd->sta_aid[i] & BIT(j)))
1336 break;
1337 }
1338 if (j < 32)
1339 break;
1340 }
1341 if (j == 32)
1342 return -1;
1343 aid = i * 32 + j + 1;
1344 if (aid > 2007)
1345 return -1;
1346
1347 sta->aid = aid;
1348 hapd->sta_aid[i] |= BIT(j);
1349 wpa_printf(MSG_DEBUG, " new AID %d", sta->aid);
1350 return 0;
1351 }
1352
1353
check_ssid(struct hostapd_data * hapd,struct sta_info * sta,const u8 * ssid_ie,size_t ssid_ie_len)1354 static u16 check_ssid(struct hostapd_data *hapd, struct sta_info *sta,
1355 const u8 *ssid_ie, size_t ssid_ie_len)
1356 {
1357 if (ssid_ie == NULL)
1358 return WLAN_STATUS_UNSPECIFIED_FAILURE;
1359
1360 if (ssid_ie_len != hapd->conf->ssid.ssid_len ||
1361 os_memcmp(ssid_ie, hapd->conf->ssid.ssid, ssid_ie_len) != 0) {
1362 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
1363 HOSTAPD_LEVEL_INFO,
1364 "Station tried to associate with unknown SSID "
1365 "'%s'", wpa_ssid_txt(ssid_ie, ssid_ie_len));
1366 return WLAN_STATUS_UNSPECIFIED_FAILURE;
1367 }
1368
1369 return WLAN_STATUS_SUCCESS;
1370 }
1371
1372
check_wmm(struct hostapd_data * hapd,struct sta_info * sta,const u8 * wmm_ie,size_t wmm_ie_len)1373 static u16 check_wmm(struct hostapd_data *hapd, struct sta_info *sta,
1374 const u8 *wmm_ie, size_t wmm_ie_len)
1375 {
1376 sta->flags &= ~WLAN_STA_WMM;
1377 sta->qosinfo = 0;
1378 if (wmm_ie && hapd->conf->wmm_enabled) {
1379 struct wmm_information_element *wmm;
1380
1381 if (!hostapd_eid_wmm_valid(hapd, wmm_ie, wmm_ie_len)) {
1382 hostapd_logger(hapd, sta->addr,
1383 HOSTAPD_MODULE_WPA,
1384 HOSTAPD_LEVEL_DEBUG,
1385 "invalid WMM element in association "
1386 "request");
1387 return WLAN_STATUS_UNSPECIFIED_FAILURE;
1388 }
1389
1390 sta->flags |= WLAN_STA_WMM;
1391 wmm = (struct wmm_information_element *) wmm_ie;
1392 sta->qosinfo = wmm->qos_info;
1393 }
1394 return WLAN_STATUS_SUCCESS;
1395 }
1396
1397
copy_supp_rates(struct hostapd_data * hapd,struct sta_info * sta,struct ieee802_11_elems * elems)1398 static u16 copy_supp_rates(struct hostapd_data *hapd, struct sta_info *sta,
1399 struct ieee802_11_elems *elems)
1400 {
1401 if (!elems->supp_rates) {
1402 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
1403 HOSTAPD_LEVEL_DEBUG,
1404 "No supported rates element in AssocReq");
1405 return WLAN_STATUS_UNSPECIFIED_FAILURE;
1406 }
1407
1408 if (elems->supp_rates_len + elems->ext_supp_rates_len >
1409 sizeof(sta->supported_rates)) {
1410 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
1411 HOSTAPD_LEVEL_DEBUG,
1412 "Invalid supported rates element length %d+%d",
1413 elems->supp_rates_len,
1414 elems->ext_supp_rates_len);
1415 return WLAN_STATUS_UNSPECIFIED_FAILURE;
1416 }
1417
1418 sta->supported_rates_len = merge_byte_arrays(
1419 sta->supported_rates, sizeof(sta->supported_rates),
1420 elems->supp_rates, elems->supp_rates_len,
1421 elems->ext_supp_rates, elems->ext_supp_rates_len);
1422
1423 return WLAN_STATUS_SUCCESS;
1424 }
1425
1426
check_ext_capab(struct hostapd_data * hapd,struct sta_info * sta,const u8 * ext_capab_ie,size_t ext_capab_ie_len)1427 static u16 check_ext_capab(struct hostapd_data *hapd, struct sta_info *sta,
1428 const u8 *ext_capab_ie, size_t ext_capab_ie_len)
1429 {
1430 #ifdef CONFIG_INTERWORKING
1431 /* check for QoS Map support */
1432 if (ext_capab_ie_len >= 5) {
1433 if (ext_capab_ie[4] & 0x01)
1434 sta->qos_map_enabled = 1;
1435 }
1436 #endif /* CONFIG_INTERWORKING */
1437
1438 if (ext_capab_ie_len > 0)
1439 sta->ecsa_supported = !!(ext_capab_ie[0] & BIT(2));
1440
1441 return WLAN_STATUS_SUCCESS;
1442 }
1443
1444
check_assoc_ies(struct hostapd_data * hapd,struct sta_info * sta,const u8 * ies,size_t ies_len,int reassoc)1445 static u16 check_assoc_ies(struct hostapd_data *hapd, struct sta_info *sta,
1446 const u8 *ies, size_t ies_len, int reassoc)
1447 {
1448 struct ieee802_11_elems elems;
1449 u16 resp;
1450 const u8 *wpa_ie;
1451 size_t wpa_ie_len;
1452 const u8 *p2p_dev_addr = NULL;
1453
1454 if (ieee802_11_parse_elems(ies, ies_len, &elems, 1) == ParseFailed) {
1455 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
1456 HOSTAPD_LEVEL_INFO, "Station sent an invalid "
1457 "association request");
1458 return WLAN_STATUS_UNSPECIFIED_FAILURE;
1459 }
1460
1461 resp = check_ssid(hapd, sta, elems.ssid, elems.ssid_len);
1462 if (resp != WLAN_STATUS_SUCCESS)
1463 return resp;
1464 resp = check_wmm(hapd, sta, elems.wmm, elems.wmm_len);
1465 if (resp != WLAN_STATUS_SUCCESS)
1466 return resp;
1467 resp = check_ext_capab(hapd, sta, elems.ext_capab, elems.ext_capab_len);
1468 if (resp != WLAN_STATUS_SUCCESS)
1469 return resp;
1470 resp = copy_supp_rates(hapd, sta, &elems);
1471 if (resp != WLAN_STATUS_SUCCESS)
1472 return resp;
1473 #ifdef CONFIG_IEEE80211N
1474 resp = copy_sta_ht_capab(hapd, sta, elems.ht_capabilities);
1475 if (resp != WLAN_STATUS_SUCCESS)
1476 return resp;
1477 if (hapd->iconf->ieee80211n && hapd->iconf->require_ht &&
1478 !(sta->flags & WLAN_STA_HT)) {
1479 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
1480 HOSTAPD_LEVEL_INFO, "Station does not support "
1481 "mandatory HT PHY - reject association");
1482 return WLAN_STATUS_ASSOC_DENIED_NO_HT;
1483 }
1484 #endif /* CONFIG_IEEE80211N */
1485
1486 #ifdef CONFIG_IEEE80211AC
1487 if (hapd->iconf->ieee80211ac) {
1488 resp = copy_sta_vht_capab(hapd, sta, elems.vht_capabilities);
1489 if (resp != WLAN_STATUS_SUCCESS)
1490 return resp;
1491
1492 resp = set_sta_vht_opmode(hapd, sta, elems.vht_opmode_notif);
1493 if (resp != WLAN_STATUS_SUCCESS)
1494 return resp;
1495 }
1496
1497 if (hapd->iconf->ieee80211ac && hapd->iconf->require_vht &&
1498 !(sta->flags & WLAN_STA_VHT)) {
1499 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
1500 HOSTAPD_LEVEL_INFO, "Station does not support "
1501 "mandatory VHT PHY - reject association");
1502 return WLAN_STATUS_ASSOC_DENIED_NO_VHT;
1503 }
1504
1505 if (hapd->conf->vendor_vht && !elems.vht_capabilities) {
1506 resp = copy_sta_vendor_vht(hapd, sta, elems.vendor_vht,
1507 elems.vendor_vht_len);
1508 if (resp != WLAN_STATUS_SUCCESS)
1509 return resp;
1510 }
1511 #endif /* CONFIG_IEEE80211AC */
1512
1513 #ifdef CONFIG_P2P
1514 if (elems.p2p) {
1515 wpabuf_free(sta->p2p_ie);
1516 sta->p2p_ie = ieee802_11_vendor_ie_concat(ies, ies_len,
1517 P2P_IE_VENDOR_TYPE);
1518 if (sta->p2p_ie)
1519 p2p_dev_addr = p2p_get_go_dev_addr(sta->p2p_ie);
1520 } else {
1521 wpabuf_free(sta->p2p_ie);
1522 sta->p2p_ie = NULL;
1523 }
1524 #endif /* CONFIG_P2P */
1525
1526 if ((hapd->conf->wpa & WPA_PROTO_RSN) && elems.rsn_ie) {
1527 wpa_ie = elems.rsn_ie;
1528 wpa_ie_len = elems.rsn_ie_len;
1529 } else if ((hapd->conf->wpa & WPA_PROTO_WPA) &&
1530 elems.wpa_ie) {
1531 wpa_ie = elems.wpa_ie;
1532 wpa_ie_len = elems.wpa_ie_len;
1533 } else {
1534 wpa_ie = NULL;
1535 wpa_ie_len = 0;
1536 }
1537
1538 #ifdef CONFIG_WPS
1539 sta->flags &= ~(WLAN_STA_WPS | WLAN_STA_MAYBE_WPS | WLAN_STA_WPS2);
1540 if (hapd->conf->wps_state && elems.wps_ie) {
1541 wpa_printf(MSG_DEBUG, "STA included WPS IE in (Re)Association "
1542 "Request - assume WPS is used");
1543 sta->flags |= WLAN_STA_WPS;
1544 wpabuf_free(sta->wps_ie);
1545 sta->wps_ie = ieee802_11_vendor_ie_concat(ies, ies_len,
1546 WPS_IE_VENDOR_TYPE);
1547 if (sta->wps_ie && wps_is_20(sta->wps_ie)) {
1548 wpa_printf(MSG_DEBUG, "WPS: STA supports WPS 2.0");
1549 sta->flags |= WLAN_STA_WPS2;
1550 }
1551 wpa_ie = NULL;
1552 wpa_ie_len = 0;
1553 if (sta->wps_ie && wps_validate_assoc_req(sta->wps_ie) < 0) {
1554 wpa_printf(MSG_DEBUG, "WPS: Invalid WPS IE in "
1555 "(Re)Association Request - reject");
1556 return WLAN_STATUS_INVALID_IE;
1557 }
1558 } else if (hapd->conf->wps_state && wpa_ie == NULL) {
1559 wpa_printf(MSG_DEBUG, "STA did not include WPA/RSN IE in "
1560 "(Re)Association Request - possible WPS use");
1561 sta->flags |= WLAN_STA_MAYBE_WPS;
1562 } else
1563 #endif /* CONFIG_WPS */
1564 if (hapd->conf->wpa && wpa_ie == NULL) {
1565 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
1566 HOSTAPD_LEVEL_INFO,
1567 "No WPA/RSN IE in association request");
1568 return WLAN_STATUS_INVALID_IE;
1569 }
1570
1571 if (hapd->conf->wpa && wpa_ie) {
1572 int res;
1573 wpa_ie -= 2;
1574 wpa_ie_len += 2;
1575 if (sta->wpa_sm == NULL)
1576 sta->wpa_sm = wpa_auth_sta_init(hapd->wpa_auth,
1577 sta->addr,
1578 p2p_dev_addr);
1579 if (sta->wpa_sm == NULL) {
1580 wpa_printf(MSG_WARNING, "Failed to initialize WPA "
1581 "state machine");
1582 return WLAN_STATUS_UNSPECIFIED_FAILURE;
1583 }
1584 res = wpa_validate_wpa_ie(hapd->wpa_auth, sta->wpa_sm,
1585 wpa_ie, wpa_ie_len,
1586 elems.mdie, elems.mdie_len);
1587 if (res == WPA_INVALID_GROUP)
1588 resp = WLAN_STATUS_GROUP_CIPHER_NOT_VALID;
1589 else if (res == WPA_INVALID_PAIRWISE)
1590 resp = WLAN_STATUS_PAIRWISE_CIPHER_NOT_VALID;
1591 else if (res == WPA_INVALID_AKMP)
1592 resp = WLAN_STATUS_AKMP_NOT_VALID;
1593 else if (res == WPA_ALLOC_FAIL)
1594 resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
1595 #ifdef CONFIG_IEEE80211W
1596 else if (res == WPA_MGMT_FRAME_PROTECTION_VIOLATION)
1597 resp = WLAN_STATUS_ROBUST_MGMT_FRAME_POLICY_VIOLATION;
1598 else if (res == WPA_INVALID_MGMT_GROUP_CIPHER)
1599 resp = WLAN_STATUS_ROBUST_MGMT_FRAME_POLICY_VIOLATION;
1600 #endif /* CONFIG_IEEE80211W */
1601 else if (res == WPA_INVALID_MDIE)
1602 resp = WLAN_STATUS_INVALID_MDIE;
1603 else if (res != WPA_IE_OK)
1604 resp = WLAN_STATUS_INVALID_IE;
1605 if (resp != WLAN_STATUS_SUCCESS)
1606 return resp;
1607 #ifdef CONFIG_IEEE80211W
1608 if ((sta->flags & WLAN_STA_MFP) && !sta->sa_query_timed_out &&
1609 sta->sa_query_count > 0)
1610 ap_check_sa_query_timeout(hapd, sta);
1611 if ((sta->flags & WLAN_STA_MFP) && !sta->sa_query_timed_out &&
1612 (!reassoc || sta->auth_alg != WLAN_AUTH_FT)) {
1613 /*
1614 * STA has already been associated with MFP and SA
1615 * Query timeout has not been reached. Reject the
1616 * association attempt temporarily and start SA Query,
1617 * if one is not pending.
1618 */
1619
1620 if (sta->sa_query_count == 0)
1621 ap_sta_start_sa_query(hapd, sta);
1622
1623 return WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY;
1624 }
1625
1626 if (wpa_auth_uses_mfp(sta->wpa_sm))
1627 sta->flags |= WLAN_STA_MFP;
1628 else
1629 sta->flags &= ~WLAN_STA_MFP;
1630 #endif /* CONFIG_IEEE80211W */
1631
1632 #ifdef CONFIG_IEEE80211R
1633 if (sta->auth_alg == WLAN_AUTH_FT) {
1634 if (!reassoc) {
1635 wpa_printf(MSG_DEBUG, "FT: " MACSTR " tried "
1636 "to use association (not "
1637 "re-association) with FT auth_alg",
1638 MAC2STR(sta->addr));
1639 return WLAN_STATUS_UNSPECIFIED_FAILURE;
1640 }
1641
1642 resp = wpa_ft_validate_reassoc(sta->wpa_sm, ies,
1643 ies_len);
1644 if (resp != WLAN_STATUS_SUCCESS)
1645 return resp;
1646 }
1647 #endif /* CONFIG_IEEE80211R */
1648
1649 #ifdef CONFIG_SAE
1650 if (wpa_auth_uses_sae(sta->wpa_sm) &&
1651 sta->auth_alg == WLAN_AUTH_OPEN) {
1652 struct rsn_pmksa_cache_entry *sa;
1653 sa = wpa_auth_sta_get_pmksa(sta->wpa_sm);
1654 if (!sa || sa->akmp != WPA_KEY_MGMT_SAE) {
1655 wpa_printf(MSG_DEBUG,
1656 "SAE: No PMKSA cache entry found for "
1657 MACSTR, MAC2STR(sta->addr));
1658 return WLAN_STATUS_INVALID_PMKID;
1659 }
1660 wpa_printf(MSG_DEBUG, "SAE: " MACSTR
1661 " using PMKSA caching", MAC2STR(sta->addr));
1662 } else if (wpa_auth_uses_sae(sta->wpa_sm) &&
1663 sta->auth_alg != WLAN_AUTH_SAE &&
1664 !(sta->auth_alg == WLAN_AUTH_FT &&
1665 wpa_auth_uses_ft_sae(sta->wpa_sm))) {
1666 wpa_printf(MSG_DEBUG, "SAE: " MACSTR " tried to use "
1667 "SAE AKM after non-SAE auth_alg %u",
1668 MAC2STR(sta->addr), sta->auth_alg);
1669 return WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG;
1670 }
1671 #endif /* CONFIG_SAE */
1672
1673 #ifdef CONFIG_IEEE80211N
1674 if ((sta->flags & (WLAN_STA_HT | WLAN_STA_VHT)) &&
1675 wpa_auth_get_pairwise(sta->wpa_sm) == WPA_CIPHER_TKIP) {
1676 hostapd_logger(hapd, sta->addr,
1677 HOSTAPD_MODULE_IEEE80211,
1678 HOSTAPD_LEVEL_INFO,
1679 "Station tried to use TKIP with HT "
1680 "association");
1681 return WLAN_STATUS_CIPHER_REJECTED_PER_POLICY;
1682 }
1683 #endif /* CONFIG_IEEE80211N */
1684 #ifdef CONFIG_HS20
1685 } else if (hapd->conf->osen) {
1686 if (elems.osen == NULL) {
1687 hostapd_logger(
1688 hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
1689 HOSTAPD_LEVEL_INFO,
1690 "No HS 2.0 OSEN element in association request");
1691 return WLAN_STATUS_INVALID_IE;
1692 }
1693
1694 wpa_printf(MSG_DEBUG, "HS 2.0: OSEN association");
1695 if (sta->wpa_sm == NULL)
1696 sta->wpa_sm = wpa_auth_sta_init(hapd->wpa_auth,
1697 sta->addr, NULL);
1698 if (sta->wpa_sm == NULL) {
1699 wpa_printf(MSG_WARNING, "Failed to initialize WPA "
1700 "state machine");
1701 return WLAN_STATUS_UNSPECIFIED_FAILURE;
1702 }
1703 if (wpa_validate_osen(hapd->wpa_auth, sta->wpa_sm,
1704 elems.osen - 2, elems.osen_len + 2) < 0)
1705 return WLAN_STATUS_INVALID_IE;
1706 #endif /* CONFIG_HS20 */
1707 } else
1708 wpa_auth_sta_no_wpa(sta->wpa_sm);
1709
1710 #ifdef CONFIG_P2P
1711 p2p_group_notif_assoc(hapd->p2p_group, sta->addr, ies, ies_len);
1712 #endif /* CONFIG_P2P */
1713
1714 #ifdef CONFIG_HS20
1715 wpabuf_free(sta->hs20_ie);
1716 if (elems.hs20 && elems.hs20_len > 4) {
1717 sta->hs20_ie = wpabuf_alloc_copy(elems.hs20 + 4,
1718 elems.hs20_len - 4);
1719 } else
1720 sta->hs20_ie = NULL;
1721 #endif /* CONFIG_HS20 */
1722
1723 #ifdef CONFIG_FST
1724 wpabuf_free(sta->mb_ies);
1725 if (hapd->iface->fst)
1726 sta->mb_ies = mb_ies_by_info(&elems.mb_ies);
1727 else
1728 sta->mb_ies = NULL;
1729 #endif /* CONFIG_FST */
1730
1731 #ifdef CONFIG_MBO
1732 mbo_ap_check_sta_assoc(hapd, sta, &elems);
1733
1734 if (hapd->conf->mbo_enabled && (hapd->conf->wpa & 2) &&
1735 elems.mbo && sta->cell_capa && !(sta->flags & WLAN_STA_MFP) &&
1736 hapd->conf->ieee80211w != NO_MGMT_FRAME_PROTECTION) {
1737 wpa_printf(MSG_INFO,
1738 "MBO: Reject WPA2 association without PMF");
1739 return WLAN_STATUS_UNSPECIFIED_FAILURE;
1740 }
1741 #endif /* CONFIG_MBO */
1742
1743 ap_copy_sta_supp_op_classes(sta, elems.supp_op_classes,
1744 elems.supp_op_classes_len);
1745
1746 return WLAN_STATUS_SUCCESS;
1747 }
1748
1749
send_deauth(struct hostapd_data * hapd,const u8 * addr,u16 reason_code)1750 static void send_deauth(struct hostapd_data *hapd, const u8 *addr,
1751 u16 reason_code)
1752 {
1753 int send_len;
1754 struct ieee80211_mgmt reply;
1755
1756 os_memset(&reply, 0, sizeof(reply));
1757 reply.frame_control =
1758 IEEE80211_FC(WLAN_FC_TYPE_MGMT, WLAN_FC_STYPE_DEAUTH);
1759 os_memcpy(reply.da, addr, ETH_ALEN);
1760 os_memcpy(reply.sa, hapd->own_addr, ETH_ALEN);
1761 os_memcpy(reply.bssid, hapd->own_addr, ETH_ALEN);
1762
1763 send_len = IEEE80211_HDRLEN + sizeof(reply.u.deauth);
1764 reply.u.deauth.reason_code = host_to_le16(reason_code);
1765
1766 if (hostapd_drv_send_mlme(hapd, &reply, send_len, 0) < 0)
1767 wpa_printf(MSG_INFO, "Failed to send deauth: %s",
1768 strerror(errno));
1769 }
1770
1771
add_associated_sta(struct hostapd_data * hapd,struct sta_info * sta)1772 static int add_associated_sta(struct hostapd_data *hapd,
1773 struct sta_info *sta)
1774 {
1775 struct ieee80211_ht_capabilities ht_cap;
1776 struct ieee80211_vht_capabilities vht_cap;
1777
1778 /*
1779 * Remove the STA entry to ensure the STA PS state gets cleared and
1780 * configuration gets updated. This is relevant for cases, such as
1781 * FT-over-the-DS, where a station re-associates back to the same AP but
1782 * skips the authentication flow, or if working with a driver that
1783 * does not support full AP client state.
1784 */
1785 if (!sta->added_unassoc)
1786 hostapd_drv_sta_remove(hapd, sta->addr);
1787
1788 #ifdef CONFIG_IEEE80211N
1789 if (sta->flags & WLAN_STA_HT)
1790 hostapd_get_ht_capab(hapd, sta->ht_capabilities, &ht_cap);
1791 #endif /* CONFIG_IEEE80211N */
1792 #ifdef CONFIG_IEEE80211AC
1793 if (sta->flags & WLAN_STA_VHT)
1794 hostapd_get_vht_capab(hapd, sta->vht_capabilities, &vht_cap);
1795 #endif /* CONFIG_IEEE80211AC */
1796
1797 /*
1798 * Add the station with forced WLAN_STA_ASSOC flag. The sta->flags
1799 * will be set when the ACK frame for the (Re)Association Response frame
1800 * is processed (TX status driver event).
1801 */
1802 if (hostapd_sta_add(hapd, sta->addr, sta->aid, sta->capability,
1803 sta->supported_rates, sta->supported_rates_len,
1804 sta->listen_interval,
1805 sta->flags & WLAN_STA_HT ? &ht_cap : NULL,
1806 sta->flags & WLAN_STA_VHT ? &vht_cap : NULL,
1807 sta->flags | WLAN_STA_ASSOC, sta->qosinfo,
1808 sta->vht_opmode, sta->added_unassoc)) {
1809 hostapd_logger(hapd, sta->addr,
1810 HOSTAPD_MODULE_IEEE80211, HOSTAPD_LEVEL_NOTICE,
1811 "Could not %s STA to kernel driver",
1812 sta->added_unassoc ? "set" : "add");
1813
1814 if (sta->added_unassoc) {
1815 hostapd_drv_sta_remove(hapd, sta->addr);
1816 sta->added_unassoc = 0;
1817 }
1818
1819 return -1;
1820 }
1821
1822 sta->added_unassoc = 0;
1823
1824 return 0;
1825 }
1826
1827
send_assoc_resp(struct hostapd_data * hapd,struct sta_info * sta,u16 status_code,int reassoc,const u8 * ies,size_t ies_len)1828 static u16 send_assoc_resp(struct hostapd_data *hapd, struct sta_info *sta,
1829 u16 status_code, int reassoc, const u8 *ies,
1830 size_t ies_len)
1831 {
1832 int send_len;
1833 u8 buf[sizeof(struct ieee80211_mgmt) + 1024];
1834 struct ieee80211_mgmt *reply;
1835 u8 *p;
1836
1837 os_memset(buf, 0, sizeof(buf));
1838 reply = (struct ieee80211_mgmt *) buf;
1839 reply->frame_control =
1840 IEEE80211_FC(WLAN_FC_TYPE_MGMT,
1841 (reassoc ? WLAN_FC_STYPE_REASSOC_RESP :
1842 WLAN_FC_STYPE_ASSOC_RESP));
1843 os_memcpy(reply->da, sta->addr, ETH_ALEN);
1844 os_memcpy(reply->sa, hapd->own_addr, ETH_ALEN);
1845 os_memcpy(reply->bssid, hapd->own_addr, ETH_ALEN);
1846
1847 send_len = IEEE80211_HDRLEN;
1848 send_len += sizeof(reply->u.assoc_resp);
1849 reply->u.assoc_resp.capab_info =
1850 host_to_le16(hostapd_own_capab_info(hapd));
1851 reply->u.assoc_resp.status_code = host_to_le16(status_code);
1852 reply->u.assoc_resp.aid = host_to_le16(sta->aid | BIT(14) | BIT(15));
1853 /* Supported rates */
1854 p = hostapd_eid_supp_rates(hapd, reply->u.assoc_resp.variable);
1855 /* Extended supported rates */
1856 p = hostapd_eid_ext_supp_rates(hapd, p);
1857
1858 #ifdef CONFIG_IEEE80211R
1859 if (status_code == WLAN_STATUS_SUCCESS) {
1860 /* IEEE 802.11r: Mobility Domain Information, Fast BSS
1861 * Transition Information, RSN, [RIC Response] */
1862 p = wpa_sm_write_assoc_resp_ies(sta->wpa_sm, p,
1863 buf + sizeof(buf) - p,
1864 sta->auth_alg, ies, ies_len);
1865 }
1866 #endif /* CONFIG_IEEE80211R */
1867
1868 #ifdef CONFIG_IEEE80211W
1869 if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY)
1870 p = hostapd_eid_assoc_comeback_time(hapd, sta, p);
1871 #endif /* CONFIG_IEEE80211W */
1872
1873 #ifdef CONFIG_IEEE80211N
1874 p = hostapd_eid_ht_capabilities(hapd, p);
1875 p = hostapd_eid_ht_operation(hapd, p);
1876 #endif /* CONFIG_IEEE80211N */
1877
1878 #ifdef CONFIG_IEEE80211AC
1879 if (hapd->iconf->ieee80211ac && !hapd->conf->disable_11ac) {
1880 p = hostapd_eid_vht_capabilities(hapd, p);
1881 p = hostapd_eid_vht_operation(hapd, p);
1882 }
1883 #endif /* CONFIG_IEEE80211AC */
1884
1885 p = hostapd_eid_ext_capab(hapd, p);
1886 p = hostapd_eid_bss_max_idle_period(hapd, p);
1887 if (sta->qos_map_enabled)
1888 p = hostapd_eid_qos_map_set(hapd, p);
1889
1890 #ifdef CONFIG_FST
1891 if (hapd->iface->fst_ies) {
1892 os_memcpy(p, wpabuf_head(hapd->iface->fst_ies),
1893 wpabuf_len(hapd->iface->fst_ies));
1894 p += wpabuf_len(hapd->iface->fst_ies);
1895 }
1896 #endif /* CONFIG_FST */
1897
1898 #ifdef CONFIG_IEEE80211AC
1899 if (hapd->conf->vendor_vht && (sta->flags & WLAN_STA_VENDOR_VHT))
1900 p = hostapd_eid_vendor_vht(hapd, p);
1901 #endif /* CONFIG_IEEE80211AC */
1902
1903 if (sta->flags & WLAN_STA_WMM)
1904 p = hostapd_eid_wmm(hapd, p);
1905
1906 #ifdef CONFIG_WPS
1907 if ((sta->flags & WLAN_STA_WPS) ||
1908 ((sta->flags & WLAN_STA_MAYBE_WPS) && hapd->conf->wpa)) {
1909 struct wpabuf *wps = wps_build_assoc_resp_ie();
1910 if (wps) {
1911 os_memcpy(p, wpabuf_head(wps), wpabuf_len(wps));
1912 p += wpabuf_len(wps);
1913 wpabuf_free(wps);
1914 }
1915 }
1916 #endif /* CONFIG_WPS */
1917
1918 #ifdef CONFIG_P2P
1919 if (sta->p2p_ie && hapd->p2p_group) {
1920 struct wpabuf *p2p_resp_ie;
1921 enum p2p_status_code status;
1922 switch (status_code) {
1923 case WLAN_STATUS_SUCCESS:
1924 status = P2P_SC_SUCCESS;
1925 break;
1926 case WLAN_STATUS_AP_UNABLE_TO_HANDLE_NEW_STA:
1927 status = P2P_SC_FAIL_LIMIT_REACHED;
1928 break;
1929 default:
1930 status = P2P_SC_FAIL_INVALID_PARAMS;
1931 break;
1932 }
1933 p2p_resp_ie = p2p_group_assoc_resp_ie(hapd->p2p_group, status);
1934 if (p2p_resp_ie) {
1935 os_memcpy(p, wpabuf_head(p2p_resp_ie),
1936 wpabuf_len(p2p_resp_ie));
1937 p += wpabuf_len(p2p_resp_ie);
1938 wpabuf_free(p2p_resp_ie);
1939 }
1940 }
1941 #endif /* CONFIG_P2P */
1942
1943 #ifdef CONFIG_P2P_MANAGER
1944 if (hapd->conf->p2p & P2P_MANAGE)
1945 p = hostapd_eid_p2p_manage(hapd, p);
1946 #endif /* CONFIG_P2P_MANAGER */
1947
1948 p = hostapd_eid_mbo(hapd, p, buf + sizeof(buf) - p);
1949
1950 send_len += p - reply->u.assoc_resp.variable;
1951
1952 if (hostapd_drv_send_mlme(hapd, reply, send_len, 0) < 0) {
1953 wpa_printf(MSG_INFO, "Failed to send assoc resp: %s",
1954 strerror(errno));
1955 return WLAN_STATUS_UNSPECIFIED_FAILURE;
1956 }
1957
1958 return WLAN_STATUS_SUCCESS;
1959 }
1960
1961
handle_assoc(struct hostapd_data * hapd,const struct ieee80211_mgmt * mgmt,size_t len,int reassoc)1962 static void handle_assoc(struct hostapd_data *hapd,
1963 const struct ieee80211_mgmt *mgmt, size_t len,
1964 int reassoc)
1965 {
1966 u16 capab_info, listen_interval, seq_ctrl, fc;
1967 u16 resp = WLAN_STATUS_SUCCESS, reply_res;
1968 const u8 *pos;
1969 int left, i;
1970 struct sta_info *sta;
1971
1972 if (len < IEEE80211_HDRLEN + (reassoc ? sizeof(mgmt->u.reassoc_req) :
1973 sizeof(mgmt->u.assoc_req))) {
1974 wpa_printf(MSG_INFO, "handle_assoc(reassoc=%d) - too short payload (len=%lu)",
1975 reassoc, (unsigned long) len);
1976 return;
1977 }
1978
1979 #ifdef CONFIG_TESTING_OPTIONS
1980 if (reassoc) {
1981 if (hapd->iconf->ignore_reassoc_probability > 0.0 &&
1982 drand48() < hapd->iconf->ignore_reassoc_probability) {
1983 wpa_printf(MSG_INFO,
1984 "TESTING: ignoring reassoc request from "
1985 MACSTR, MAC2STR(mgmt->sa));
1986 return;
1987 }
1988 } else {
1989 if (hapd->iconf->ignore_assoc_probability > 0.0 &&
1990 drand48() < hapd->iconf->ignore_assoc_probability) {
1991 wpa_printf(MSG_INFO,
1992 "TESTING: ignoring assoc request from "
1993 MACSTR, MAC2STR(mgmt->sa));
1994 return;
1995 }
1996 }
1997 #endif /* CONFIG_TESTING_OPTIONS */
1998
1999 fc = le_to_host16(mgmt->frame_control);
2000 seq_ctrl = le_to_host16(mgmt->seq_ctrl);
2001
2002 if (reassoc) {
2003 capab_info = le_to_host16(mgmt->u.reassoc_req.capab_info);
2004 listen_interval = le_to_host16(
2005 mgmt->u.reassoc_req.listen_interval);
2006 wpa_printf(MSG_DEBUG, "reassociation request: STA=" MACSTR
2007 " capab_info=0x%02x listen_interval=%d current_ap="
2008 MACSTR " seq_ctrl=0x%x%s",
2009 MAC2STR(mgmt->sa), capab_info, listen_interval,
2010 MAC2STR(mgmt->u.reassoc_req.current_ap),
2011 seq_ctrl, (fc & WLAN_FC_RETRY) ? " retry" : "");
2012 left = len - (IEEE80211_HDRLEN + sizeof(mgmt->u.reassoc_req));
2013 pos = mgmt->u.reassoc_req.variable;
2014 } else {
2015 capab_info = le_to_host16(mgmt->u.assoc_req.capab_info);
2016 listen_interval = le_to_host16(
2017 mgmt->u.assoc_req.listen_interval);
2018 wpa_printf(MSG_DEBUG, "association request: STA=" MACSTR
2019 " capab_info=0x%02x listen_interval=%d "
2020 "seq_ctrl=0x%x%s",
2021 MAC2STR(mgmt->sa), capab_info, listen_interval,
2022 seq_ctrl, (fc & WLAN_FC_RETRY) ? " retry" : "");
2023 left = len - (IEEE80211_HDRLEN + sizeof(mgmt->u.assoc_req));
2024 pos = mgmt->u.assoc_req.variable;
2025 }
2026
2027 sta = ap_get_sta(hapd, mgmt->sa);
2028 #ifdef CONFIG_IEEE80211R
2029 if (sta && sta->auth_alg == WLAN_AUTH_FT &&
2030 (sta->flags & WLAN_STA_AUTH) == 0) {
2031 wpa_printf(MSG_DEBUG, "FT: Allow STA " MACSTR " to associate "
2032 "prior to authentication since it is using "
2033 "over-the-DS FT", MAC2STR(mgmt->sa));
2034
2035 /*
2036 * Mark station as authenticated, to avoid adding station
2037 * entry in the driver as associated and not authenticated
2038 */
2039 sta->flags |= WLAN_STA_AUTH;
2040 } else
2041 #endif /* CONFIG_IEEE80211R */
2042 if (sta == NULL || (sta->flags & WLAN_STA_AUTH) == 0) {
2043 hostapd_logger(hapd, mgmt->sa, HOSTAPD_MODULE_IEEE80211,
2044 HOSTAPD_LEVEL_INFO, "Station tried to "
2045 "associate before authentication "
2046 "(aid=%d flags=0x%x)",
2047 sta ? sta->aid : -1,
2048 sta ? sta->flags : 0);
2049 send_deauth(hapd, mgmt->sa,
2050 WLAN_REASON_CLASS2_FRAME_FROM_NONAUTH_STA);
2051 return;
2052 }
2053
2054 if ((fc & WLAN_FC_RETRY) &&
2055 sta->last_seq_ctrl != WLAN_INVALID_MGMT_SEQ &&
2056 sta->last_seq_ctrl == seq_ctrl &&
2057 sta->last_subtype == reassoc ? WLAN_FC_STYPE_REASSOC_REQ :
2058 WLAN_FC_STYPE_ASSOC_REQ) {
2059 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
2060 HOSTAPD_LEVEL_DEBUG,
2061 "Drop repeated association frame seq_ctrl=0x%x",
2062 seq_ctrl);
2063 return;
2064 }
2065 sta->last_seq_ctrl = seq_ctrl;
2066 sta->last_subtype = reassoc ? WLAN_FC_STYPE_REASSOC_REQ :
2067 WLAN_FC_STYPE_ASSOC_REQ;
2068
2069 if (hapd->tkip_countermeasures) {
2070 resp = WLAN_REASON_MICHAEL_MIC_FAILURE;
2071 goto fail;
2072 }
2073
2074 if (listen_interval > hapd->conf->max_listen_interval) {
2075 hostapd_logger(hapd, mgmt->sa, HOSTAPD_MODULE_IEEE80211,
2076 HOSTAPD_LEVEL_DEBUG,
2077 "Too large Listen Interval (%d)",
2078 listen_interval);
2079 resp = WLAN_STATUS_ASSOC_DENIED_LISTEN_INT_TOO_LARGE;
2080 goto fail;
2081 }
2082
2083 #ifdef CONFIG_MBO
2084 if (hapd->conf->mbo_enabled && hapd->mbo_assoc_disallow) {
2085 resp = WLAN_STATUS_AP_UNABLE_TO_HANDLE_NEW_STA;
2086 goto fail;
2087 }
2088 #endif /* CONFIG_MBO */
2089
2090 /* followed by SSID and Supported rates; and HT capabilities if 802.11n
2091 * is used */
2092 resp = check_assoc_ies(hapd, sta, pos, left, reassoc);
2093 if (resp != WLAN_STATUS_SUCCESS)
2094 goto fail;
2095
2096 if (hostapd_get_aid(hapd, sta) < 0) {
2097 hostapd_logger(hapd, mgmt->sa, HOSTAPD_MODULE_IEEE80211,
2098 HOSTAPD_LEVEL_INFO, "No room for more AIDs");
2099 resp = WLAN_STATUS_AP_UNABLE_TO_HANDLE_NEW_STA;
2100 goto fail;
2101 }
2102
2103 sta->capability = capab_info;
2104 sta->listen_interval = listen_interval;
2105
2106 if (hapd->iface->current_mode->mode == HOSTAPD_MODE_IEEE80211G)
2107 sta->flags |= WLAN_STA_NONERP;
2108 for (i = 0; i < sta->supported_rates_len; i++) {
2109 if ((sta->supported_rates[i] & 0x7f) > 22) {
2110 sta->flags &= ~WLAN_STA_NONERP;
2111 break;
2112 }
2113 }
2114 if (sta->flags & WLAN_STA_NONERP && !sta->nonerp_set) {
2115 sta->nonerp_set = 1;
2116 hapd->iface->num_sta_non_erp++;
2117 if (hapd->iface->num_sta_non_erp == 1)
2118 ieee802_11_set_beacons(hapd->iface);
2119 }
2120
2121 if (!(sta->capability & WLAN_CAPABILITY_SHORT_SLOT_TIME) &&
2122 !sta->no_short_slot_time_set) {
2123 sta->no_short_slot_time_set = 1;
2124 hapd->iface->num_sta_no_short_slot_time++;
2125 if (hapd->iface->current_mode->mode ==
2126 HOSTAPD_MODE_IEEE80211G &&
2127 hapd->iface->num_sta_no_short_slot_time == 1)
2128 ieee802_11_set_beacons(hapd->iface);
2129 }
2130
2131 if (sta->capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
2132 sta->flags |= WLAN_STA_SHORT_PREAMBLE;
2133 else
2134 sta->flags &= ~WLAN_STA_SHORT_PREAMBLE;
2135
2136 if (!(sta->capability & WLAN_CAPABILITY_SHORT_PREAMBLE) &&
2137 !sta->no_short_preamble_set) {
2138 sta->no_short_preamble_set = 1;
2139 hapd->iface->num_sta_no_short_preamble++;
2140 if (hapd->iface->current_mode->mode == HOSTAPD_MODE_IEEE80211G
2141 && hapd->iface->num_sta_no_short_preamble == 1)
2142 ieee802_11_set_beacons(hapd->iface);
2143 }
2144
2145 #ifdef CONFIG_IEEE80211N
2146 update_ht_state(hapd, sta);
2147 #endif /* CONFIG_IEEE80211N */
2148
2149 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
2150 HOSTAPD_LEVEL_DEBUG,
2151 "association OK (aid %d)", sta->aid);
2152 /* Station will be marked associated, after it acknowledges AssocResp
2153 */
2154 sta->flags |= WLAN_STA_ASSOC_REQ_OK;
2155
2156 #ifdef CONFIG_IEEE80211W
2157 if ((sta->flags & WLAN_STA_MFP) && sta->sa_query_timed_out) {
2158 wpa_printf(MSG_DEBUG, "Allowing %sassociation after timed out "
2159 "SA Query procedure", reassoc ? "re" : "");
2160 /* TODO: Send a protected Disassociate frame to the STA using
2161 * the old key and Reason Code "Previous Authentication no
2162 * longer valid". Make sure this is only sent protected since
2163 * unprotected frame would be received by the STA that is now
2164 * trying to associate.
2165 */
2166 }
2167 #endif /* CONFIG_IEEE80211W */
2168
2169 /* Make sure that the previously registered inactivity timer will not
2170 * remove the STA immediately. */
2171 sta->timeout_next = STA_NULLFUNC;
2172
2173 fail:
2174 /*
2175 * In case of a successful response, add the station to the driver.
2176 * Otherwise, the kernel may ignore Data frames before we process the
2177 * ACK frame (TX status). In case of a failure, this station will be
2178 * removed.
2179 *
2180 * Note that this is not compliant with the IEEE 802.11 standard that
2181 * states that a non-AP station should transition into the
2182 * authenticated/associated state only after the station acknowledges
2183 * the (Re)Association Response frame. However, still do this as:
2184 *
2185 * 1. In case the station does not acknowledge the (Re)Association
2186 * Response frame, it will be removed.
2187 * 2. Data frames will be dropped in the kernel until the station is
2188 * set into authorized state, and there are no significant known
2189 * issues with processing other non-Data Class 3 frames during this
2190 * window.
2191 */
2192 if (resp == WLAN_STATUS_SUCCESS && add_associated_sta(hapd, sta))
2193 resp = WLAN_STATUS_AP_UNABLE_TO_HANDLE_NEW_STA;
2194
2195 reply_res = send_assoc_resp(hapd, sta, resp, reassoc, pos, left);
2196
2197 /*
2198 * Remove the station in case tranmission of a success response fails
2199 * (the STA was added associated to the driver) or if the station was
2200 * previously added unassociated.
2201 */
2202 if ((reply_res != WLAN_STATUS_SUCCESS &&
2203 resp == WLAN_STATUS_SUCCESS) || sta->added_unassoc) {
2204 hostapd_drv_sta_remove(hapd, sta->addr);
2205 sta->added_unassoc = 0;
2206 }
2207 }
2208
2209
handle_disassoc(struct hostapd_data * hapd,const struct ieee80211_mgmt * mgmt,size_t len)2210 static void handle_disassoc(struct hostapd_data *hapd,
2211 const struct ieee80211_mgmt *mgmt, size_t len)
2212 {
2213 struct sta_info *sta;
2214
2215 if (len < IEEE80211_HDRLEN + sizeof(mgmt->u.disassoc)) {
2216 wpa_printf(MSG_INFO, "handle_disassoc - too short payload (len=%lu)",
2217 (unsigned long) len);
2218 return;
2219 }
2220
2221 wpa_printf(MSG_DEBUG, "disassocation: STA=" MACSTR " reason_code=%d",
2222 MAC2STR(mgmt->sa),
2223 le_to_host16(mgmt->u.disassoc.reason_code));
2224
2225 sta = ap_get_sta(hapd, mgmt->sa);
2226 if (sta == NULL) {
2227 wpa_printf(MSG_INFO, "Station " MACSTR " trying to disassociate, but it is not associated",
2228 MAC2STR(mgmt->sa));
2229 return;
2230 }
2231
2232 ap_sta_set_authorized(hapd, sta, 0);
2233 sta->last_seq_ctrl = WLAN_INVALID_MGMT_SEQ;
2234 sta->flags &= ~(WLAN_STA_ASSOC | WLAN_STA_ASSOC_REQ_OK);
2235 wpa_auth_sm_event(sta->wpa_sm, WPA_DISASSOC);
2236 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
2237 HOSTAPD_LEVEL_INFO, "disassociated");
2238 sta->acct_terminate_cause = RADIUS_ACCT_TERMINATE_CAUSE_USER_REQUEST;
2239 ieee802_1x_notify_port_enabled(sta->eapol_sm, 0);
2240 /* Stop Accounting and IEEE 802.1X sessions, but leave the STA
2241 * authenticated. */
2242 accounting_sta_stop(hapd, sta);
2243 ieee802_1x_free_station(hapd, sta);
2244 if (sta->ipaddr)
2245 hostapd_drv_br_delete_ip_neigh(hapd, 4, (u8 *) &sta->ipaddr);
2246 ap_sta_ip6addr_del(hapd, sta);
2247 hostapd_drv_sta_remove(hapd, sta->addr);
2248 sta->added_unassoc = 0;
2249
2250 if (sta->timeout_next == STA_NULLFUNC ||
2251 sta->timeout_next == STA_DISASSOC) {
2252 sta->timeout_next = STA_DEAUTH;
2253 eloop_cancel_timeout(ap_handle_timer, hapd, sta);
2254 eloop_register_timeout(AP_DEAUTH_DELAY, 0, ap_handle_timer,
2255 hapd, sta);
2256 }
2257
2258 mlme_disassociate_indication(
2259 hapd, sta, le_to_host16(mgmt->u.disassoc.reason_code));
2260 }
2261
2262
handle_deauth(struct hostapd_data * hapd,const struct ieee80211_mgmt * mgmt,size_t len)2263 static void handle_deauth(struct hostapd_data *hapd,
2264 const struct ieee80211_mgmt *mgmt, size_t len)
2265 {
2266 struct sta_info *sta;
2267
2268 if (len < IEEE80211_HDRLEN + sizeof(mgmt->u.deauth)) {
2269 wpa_msg(hapd->msg_ctx, MSG_DEBUG, "handle_deauth - too short "
2270 "payload (len=%lu)", (unsigned long) len);
2271 return;
2272 }
2273
2274 wpa_msg(hapd->msg_ctx, MSG_DEBUG, "deauthentication: STA=" MACSTR
2275 " reason_code=%d",
2276 MAC2STR(mgmt->sa), le_to_host16(mgmt->u.deauth.reason_code));
2277
2278 sta = ap_get_sta(hapd, mgmt->sa);
2279 if (sta == NULL) {
2280 wpa_msg(hapd->msg_ctx, MSG_DEBUG, "Station " MACSTR " trying "
2281 "to deauthenticate, but it is not authenticated",
2282 MAC2STR(mgmt->sa));
2283 return;
2284 }
2285
2286 ap_sta_set_authorized(hapd, sta, 0);
2287 sta->last_seq_ctrl = WLAN_INVALID_MGMT_SEQ;
2288 sta->flags &= ~(WLAN_STA_AUTH | WLAN_STA_ASSOC |
2289 WLAN_STA_ASSOC_REQ_OK);
2290 wpa_auth_sm_event(sta->wpa_sm, WPA_DEAUTH);
2291 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
2292 HOSTAPD_LEVEL_DEBUG, "deauthenticated");
2293 mlme_deauthenticate_indication(
2294 hapd, sta, le_to_host16(mgmt->u.deauth.reason_code));
2295 sta->acct_terminate_cause = RADIUS_ACCT_TERMINATE_CAUSE_USER_REQUEST;
2296 ieee802_1x_notify_port_enabled(sta->eapol_sm, 0);
2297 ap_free_sta(hapd, sta);
2298 }
2299
2300
handle_beacon(struct hostapd_data * hapd,const struct ieee80211_mgmt * mgmt,size_t len,struct hostapd_frame_info * fi)2301 static void handle_beacon(struct hostapd_data *hapd,
2302 const struct ieee80211_mgmt *mgmt, size_t len,
2303 struct hostapd_frame_info *fi)
2304 {
2305 struct ieee802_11_elems elems;
2306
2307 if (len < IEEE80211_HDRLEN + sizeof(mgmt->u.beacon)) {
2308 wpa_printf(MSG_INFO, "handle_beacon - too short payload (len=%lu)",
2309 (unsigned long) len);
2310 return;
2311 }
2312
2313 (void) ieee802_11_parse_elems(mgmt->u.beacon.variable,
2314 len - (IEEE80211_HDRLEN +
2315 sizeof(mgmt->u.beacon)), &elems,
2316 0);
2317
2318 ap_list_process_beacon(hapd->iface, mgmt, &elems, fi);
2319 }
2320
2321
2322 #ifdef CONFIG_IEEE80211W
2323
hostapd_sa_query_action(struct hostapd_data * hapd,const struct ieee80211_mgmt * mgmt,size_t len)2324 static int hostapd_sa_query_action(struct hostapd_data *hapd,
2325 const struct ieee80211_mgmt *mgmt,
2326 size_t len)
2327 {
2328 const u8 *end;
2329
2330 end = mgmt->u.action.u.sa_query_resp.trans_id +
2331 WLAN_SA_QUERY_TR_ID_LEN;
2332 if (((u8 *) mgmt) + len < end) {
2333 wpa_printf(MSG_DEBUG, "IEEE 802.11: Too short SA Query Action "
2334 "frame (len=%lu)", (unsigned long) len);
2335 return 0;
2336 }
2337
2338 ieee802_11_sa_query_action(hapd, mgmt->sa,
2339 mgmt->u.action.u.sa_query_resp.action,
2340 mgmt->u.action.u.sa_query_resp.trans_id);
2341 return 1;
2342 }
2343
2344
robust_action_frame(u8 category)2345 static int robust_action_frame(u8 category)
2346 {
2347 return category != WLAN_ACTION_PUBLIC &&
2348 category != WLAN_ACTION_HT;
2349 }
2350 #endif /* CONFIG_IEEE80211W */
2351
2352
handle_action(struct hostapd_data * hapd,const struct ieee80211_mgmt * mgmt,size_t len)2353 static int handle_action(struct hostapd_data *hapd,
2354 const struct ieee80211_mgmt *mgmt, size_t len)
2355 {
2356 struct sta_info *sta;
2357 sta = ap_get_sta(hapd, mgmt->sa);
2358
2359 if (len < IEEE80211_HDRLEN + 1) {
2360 hostapd_logger(hapd, mgmt->sa, HOSTAPD_MODULE_IEEE80211,
2361 HOSTAPD_LEVEL_DEBUG,
2362 "handle_action - too short payload (len=%lu)",
2363 (unsigned long) len);
2364 return 0;
2365 }
2366
2367 if (mgmt->u.action.category != WLAN_ACTION_PUBLIC &&
2368 (sta == NULL || !(sta->flags & WLAN_STA_ASSOC))) {
2369 wpa_printf(MSG_DEBUG, "IEEE 802.11: Ignored Action "
2370 "frame (category=%u) from unassociated STA " MACSTR,
2371 MAC2STR(mgmt->sa), mgmt->u.action.category);
2372 return 0;
2373 }
2374
2375 #ifdef CONFIG_IEEE80211W
2376 if (sta && (sta->flags & WLAN_STA_MFP) &&
2377 !(mgmt->frame_control & host_to_le16(WLAN_FC_ISWEP)) &&
2378 robust_action_frame(mgmt->u.action.category)) {
2379 hostapd_logger(hapd, mgmt->sa, HOSTAPD_MODULE_IEEE80211,
2380 HOSTAPD_LEVEL_DEBUG,
2381 "Dropped unprotected Robust Action frame from "
2382 "an MFP STA");
2383 return 0;
2384 }
2385 #endif /* CONFIG_IEEE80211W */
2386
2387 if (sta) {
2388 u16 fc = le_to_host16(mgmt->frame_control);
2389 u16 seq_ctrl = le_to_host16(mgmt->seq_ctrl);
2390
2391 if ((fc & WLAN_FC_RETRY) &&
2392 sta->last_seq_ctrl != WLAN_INVALID_MGMT_SEQ &&
2393 sta->last_seq_ctrl == seq_ctrl &&
2394 sta->last_subtype == WLAN_FC_STYPE_ACTION) {
2395 hostapd_logger(hapd, sta->addr,
2396 HOSTAPD_MODULE_IEEE80211,
2397 HOSTAPD_LEVEL_DEBUG,
2398 "Drop repeated action frame seq_ctrl=0x%x",
2399 seq_ctrl);
2400 return 1;
2401 }
2402
2403 sta->last_seq_ctrl = seq_ctrl;
2404 sta->last_subtype = WLAN_FC_STYPE_ACTION;
2405 }
2406
2407 switch (mgmt->u.action.category) {
2408 #ifdef CONFIG_IEEE80211R
2409 case WLAN_ACTION_FT:
2410 if (!sta ||
2411 wpa_ft_action_rx(sta->wpa_sm, (u8 *) &mgmt->u.action,
2412 len - IEEE80211_HDRLEN))
2413 break;
2414 return 1;
2415 #endif /* CONFIG_IEEE80211R */
2416 case WLAN_ACTION_WMM:
2417 hostapd_wmm_action(hapd, mgmt, len);
2418 return 1;
2419 #ifdef CONFIG_IEEE80211W
2420 case WLAN_ACTION_SA_QUERY:
2421 return hostapd_sa_query_action(hapd, mgmt, len);
2422 #endif /* CONFIG_IEEE80211W */
2423 #ifdef CONFIG_WNM
2424 case WLAN_ACTION_WNM:
2425 ieee802_11_rx_wnm_action_ap(hapd, mgmt, len);
2426 return 1;
2427 #endif /* CONFIG_WNM */
2428 #ifdef CONFIG_FST
2429 case WLAN_ACTION_FST:
2430 if (hapd->iface->fst)
2431 fst_rx_action(hapd->iface->fst, mgmt, len);
2432 else
2433 wpa_printf(MSG_DEBUG,
2434 "FST: Ignore FST Action frame - no FST attached");
2435 return 1;
2436 #endif /* CONFIG_FST */
2437 case WLAN_ACTION_PUBLIC:
2438 case WLAN_ACTION_PROTECTED_DUAL:
2439 #ifdef CONFIG_IEEE80211N
2440 if (len >= IEEE80211_HDRLEN + 2 &&
2441 mgmt->u.action.u.public_action.action ==
2442 WLAN_PA_20_40_BSS_COEX) {
2443 wpa_printf(MSG_DEBUG,
2444 "HT20/40 coex mgmt frame received from STA "
2445 MACSTR, MAC2STR(mgmt->sa));
2446 hostapd_2040_coex_action(hapd, mgmt, len);
2447 }
2448 #endif /* CONFIG_IEEE80211N */
2449 if (hapd->public_action_cb) {
2450 hapd->public_action_cb(hapd->public_action_cb_ctx,
2451 (u8 *) mgmt, len,
2452 hapd->iface->freq);
2453 }
2454 if (hapd->public_action_cb2) {
2455 hapd->public_action_cb2(hapd->public_action_cb2_ctx,
2456 (u8 *) mgmt, len,
2457 hapd->iface->freq);
2458 }
2459 if (hapd->public_action_cb || hapd->public_action_cb2)
2460 return 1;
2461 break;
2462 case WLAN_ACTION_VENDOR_SPECIFIC:
2463 if (hapd->vendor_action_cb) {
2464 if (hapd->vendor_action_cb(hapd->vendor_action_cb_ctx,
2465 (u8 *) mgmt, len,
2466 hapd->iface->freq) == 0)
2467 return 1;
2468 }
2469 break;
2470 }
2471
2472 hostapd_logger(hapd, mgmt->sa, HOSTAPD_MODULE_IEEE80211,
2473 HOSTAPD_LEVEL_DEBUG,
2474 "handle_action - unknown action category %d or invalid "
2475 "frame",
2476 mgmt->u.action.category);
2477 if (!(mgmt->da[0] & 0x01) && !(mgmt->u.action.category & 0x80) &&
2478 !(mgmt->sa[0] & 0x01)) {
2479 struct ieee80211_mgmt *resp;
2480
2481 /*
2482 * IEEE 802.11-REVma/D9.0 - 7.3.1.11
2483 * Return the Action frame to the source without change
2484 * except that MSB of the Category set to 1.
2485 */
2486 wpa_printf(MSG_DEBUG, "IEEE 802.11: Return unknown Action "
2487 "frame back to sender");
2488 resp = os_malloc(len);
2489 if (resp == NULL)
2490 return 0;
2491 os_memcpy(resp, mgmt, len);
2492 os_memcpy(resp->da, resp->sa, ETH_ALEN);
2493 os_memcpy(resp->sa, hapd->own_addr, ETH_ALEN);
2494 os_memcpy(resp->bssid, hapd->own_addr, ETH_ALEN);
2495 resp->u.action.category |= 0x80;
2496
2497 if (hostapd_drv_send_mlme(hapd, resp, len, 0) < 0) {
2498 wpa_printf(MSG_ERROR, "IEEE 802.11: Failed to send "
2499 "Action frame");
2500 }
2501 os_free(resp);
2502 }
2503
2504 return 1;
2505 }
2506
2507
2508 /**
2509 * ieee802_11_mgmt - process incoming IEEE 802.11 management frames
2510 * @hapd: hostapd BSS data structure (the BSS to which the management frame was
2511 * sent to)
2512 * @buf: management frame data (starting from IEEE 802.11 header)
2513 * @len: length of frame data in octets
2514 * @fi: meta data about received frame (signal level, etc.)
2515 *
2516 * Process all incoming IEEE 802.11 management frames. This will be called for
2517 * each frame received from the kernel driver through wlan#ap interface. In
2518 * addition, it can be called to re-inserted pending frames (e.g., when using
2519 * external RADIUS server as an MAC ACL).
2520 */
ieee802_11_mgmt(struct hostapd_data * hapd,const u8 * buf,size_t len,struct hostapd_frame_info * fi)2521 int ieee802_11_mgmt(struct hostapd_data *hapd, const u8 *buf, size_t len,
2522 struct hostapd_frame_info *fi)
2523 {
2524 struct ieee80211_mgmt *mgmt;
2525 int broadcast;
2526 u16 fc, stype;
2527 int ret = 0;
2528
2529 if (len < 24)
2530 return 0;
2531
2532 mgmt = (struct ieee80211_mgmt *) buf;
2533 fc = le_to_host16(mgmt->frame_control);
2534 stype = WLAN_FC_GET_STYPE(fc);
2535
2536 if (stype == WLAN_FC_STYPE_BEACON) {
2537 handle_beacon(hapd, mgmt, len, fi);
2538 return 1;
2539 }
2540
2541 broadcast = mgmt->bssid[0] == 0xff && mgmt->bssid[1] == 0xff &&
2542 mgmt->bssid[2] == 0xff && mgmt->bssid[3] == 0xff &&
2543 mgmt->bssid[4] == 0xff && mgmt->bssid[5] == 0xff;
2544
2545 if (!broadcast &&
2546 #ifdef CONFIG_P2P
2547 /* Invitation responses can be sent with the peer MAC as BSSID */
2548 !((hapd->conf->p2p & P2P_GROUP_OWNER) &&
2549 stype == WLAN_FC_STYPE_ACTION) &&
2550 #endif /* CONFIG_P2P */
2551 #ifdef CONFIG_MESH
2552 !(hapd->conf->mesh & MESH_ENABLED) &&
2553 #endif /* CONFIG_MESH */
2554 os_memcmp(mgmt->bssid, hapd->own_addr, ETH_ALEN) != 0) {
2555 wpa_printf(MSG_INFO, "MGMT: BSSID=" MACSTR " not our address",
2556 MAC2STR(mgmt->bssid));
2557 return 0;
2558 }
2559
2560
2561 if (stype == WLAN_FC_STYPE_PROBE_REQ) {
2562 handle_probe_req(hapd, mgmt, len, fi->ssi_signal);
2563 return 1;
2564 }
2565
2566 if (os_memcmp(mgmt->da, hapd->own_addr, ETH_ALEN) != 0) {
2567 hostapd_logger(hapd, mgmt->sa, HOSTAPD_MODULE_IEEE80211,
2568 HOSTAPD_LEVEL_DEBUG,
2569 "MGMT: DA=" MACSTR " not our address",
2570 MAC2STR(mgmt->da));
2571 return 0;
2572 }
2573
2574 if (hapd->iconf->track_sta_max_num)
2575 sta_track_add(hapd->iface, mgmt->sa);
2576
2577 switch (stype) {
2578 case WLAN_FC_STYPE_AUTH:
2579 wpa_printf(MSG_DEBUG, "mgmt::auth");
2580 handle_auth(hapd, mgmt, len);
2581 ret = 1;
2582 break;
2583 case WLAN_FC_STYPE_ASSOC_REQ:
2584 wpa_printf(MSG_DEBUG, "mgmt::assoc_req");
2585 handle_assoc(hapd, mgmt, len, 0);
2586 ret = 1;
2587 break;
2588 case WLAN_FC_STYPE_REASSOC_REQ:
2589 wpa_printf(MSG_DEBUG, "mgmt::reassoc_req");
2590 handle_assoc(hapd, mgmt, len, 1);
2591 ret = 1;
2592 break;
2593 case WLAN_FC_STYPE_DISASSOC:
2594 wpa_printf(MSG_DEBUG, "mgmt::disassoc");
2595 handle_disassoc(hapd, mgmt, len);
2596 ret = 1;
2597 break;
2598 case WLAN_FC_STYPE_DEAUTH:
2599 wpa_msg(hapd->msg_ctx, MSG_DEBUG, "mgmt::deauth");
2600 handle_deauth(hapd, mgmt, len);
2601 ret = 1;
2602 break;
2603 case WLAN_FC_STYPE_ACTION:
2604 wpa_printf(MSG_DEBUG, "mgmt::action");
2605 ret = handle_action(hapd, mgmt, len);
2606 break;
2607 default:
2608 hostapd_logger(hapd, mgmt->sa, HOSTAPD_MODULE_IEEE80211,
2609 HOSTAPD_LEVEL_DEBUG,
2610 "unknown mgmt frame subtype %d", stype);
2611 break;
2612 }
2613
2614 return ret;
2615 }
2616
2617
handle_auth_cb(struct hostapd_data * hapd,const struct ieee80211_mgmt * mgmt,size_t len,int ok)2618 static void handle_auth_cb(struct hostapd_data *hapd,
2619 const struct ieee80211_mgmt *mgmt,
2620 size_t len, int ok)
2621 {
2622 u16 auth_alg, auth_transaction, status_code;
2623 struct sta_info *sta;
2624
2625 sta = ap_get_sta(hapd, mgmt->da);
2626 if (!sta) {
2627 wpa_printf(MSG_INFO, "handle_auth_cb: STA " MACSTR " not found",
2628 MAC2STR(mgmt->da));
2629 return;
2630 }
2631
2632 auth_alg = le_to_host16(mgmt->u.auth.auth_alg);
2633 auth_transaction = le_to_host16(mgmt->u.auth.auth_transaction);
2634 status_code = le_to_host16(mgmt->u.auth.status_code);
2635
2636 if (!ok) {
2637 hostapd_logger(hapd, mgmt->da, HOSTAPD_MODULE_IEEE80211,
2638 HOSTAPD_LEVEL_NOTICE,
2639 "did not acknowledge authentication response");
2640 goto fail;
2641 }
2642
2643 if (len < IEEE80211_HDRLEN + sizeof(mgmt->u.auth)) {
2644 wpa_printf(MSG_INFO, "handle_auth_cb - too short payload (len=%lu)",
2645 (unsigned long) len);
2646 goto fail;
2647 }
2648
2649 if (status_code == WLAN_STATUS_SUCCESS &&
2650 ((auth_alg == WLAN_AUTH_OPEN && auth_transaction == 2) ||
2651 (auth_alg == WLAN_AUTH_SHARED_KEY && auth_transaction == 4))) {
2652 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
2653 HOSTAPD_LEVEL_INFO, "authenticated");
2654 sta->flags |= WLAN_STA_AUTH;
2655 if (sta->added_unassoc)
2656 hostapd_set_sta_flags(hapd, sta);
2657 return;
2658 }
2659
2660 fail:
2661 if (status_code != WLAN_STATUS_SUCCESS && sta->added_unassoc) {
2662 hostapd_drv_sta_remove(hapd, sta->addr);
2663 sta->added_unassoc = 0;
2664 }
2665 }
2666
2667
hostapd_set_wds_encryption(struct hostapd_data * hapd,struct sta_info * sta,char * ifname_wds)2668 static void hostapd_set_wds_encryption(struct hostapd_data *hapd,
2669 struct sta_info *sta,
2670 char *ifname_wds)
2671 {
2672 int i;
2673 struct hostapd_ssid *ssid = &hapd->conf->ssid;
2674
2675 if (hapd->conf->ieee802_1x || hapd->conf->wpa)
2676 return;
2677
2678 for (i = 0; i < 4; i++) {
2679 if (ssid->wep.key[i] &&
2680 hostapd_drv_set_key(ifname_wds, hapd, WPA_ALG_WEP, NULL, i,
2681 i == ssid->wep.idx, NULL, 0,
2682 ssid->wep.key[i], ssid->wep.len[i])) {
2683 wpa_printf(MSG_WARNING,
2684 "Could not set WEP keys for WDS interface; %s",
2685 ifname_wds);
2686 break;
2687 }
2688 }
2689 }
2690
2691
handle_assoc_cb(struct hostapd_data * hapd,const struct ieee80211_mgmt * mgmt,size_t len,int reassoc,int ok)2692 static void handle_assoc_cb(struct hostapd_data *hapd,
2693 const struct ieee80211_mgmt *mgmt,
2694 size_t len, int reassoc, int ok)
2695 {
2696 u16 status;
2697 struct sta_info *sta;
2698 int new_assoc = 1;
2699
2700 sta = ap_get_sta(hapd, mgmt->da);
2701 if (!sta) {
2702 wpa_printf(MSG_INFO, "handle_assoc_cb: STA " MACSTR " not found",
2703 MAC2STR(mgmt->da));
2704 return;
2705 }
2706
2707 if (len < IEEE80211_HDRLEN + (reassoc ? sizeof(mgmt->u.reassoc_resp) :
2708 sizeof(mgmt->u.assoc_resp))) {
2709 wpa_printf(MSG_INFO,
2710 "handle_assoc_cb(reassoc=%d) - too short payload (len=%lu)",
2711 reassoc, (unsigned long) len);
2712 hostapd_drv_sta_remove(hapd, sta->addr);
2713 return;
2714 }
2715
2716 if (reassoc)
2717 status = le_to_host16(mgmt->u.reassoc_resp.status_code);
2718 else
2719 status = le_to_host16(mgmt->u.assoc_resp.status_code);
2720
2721 if (!ok) {
2722 hostapd_logger(hapd, mgmt->da, HOSTAPD_MODULE_IEEE80211,
2723 HOSTAPD_LEVEL_DEBUG,
2724 "did not acknowledge association response");
2725 sta->flags &= ~WLAN_STA_ASSOC_REQ_OK;
2726 /* The STA is added only in case of SUCCESS */
2727 if (status == WLAN_STATUS_SUCCESS)
2728 hostapd_drv_sta_remove(hapd, sta->addr);
2729
2730 return;
2731 }
2732
2733 if (status != WLAN_STATUS_SUCCESS)
2734 return;
2735
2736 /* Stop previous accounting session, if one is started, and allocate
2737 * new session id for the new session. */
2738 accounting_sta_stop(hapd, sta);
2739
2740 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
2741 HOSTAPD_LEVEL_INFO,
2742 "associated (aid %d)",
2743 sta->aid);
2744
2745 if (sta->flags & WLAN_STA_ASSOC)
2746 new_assoc = 0;
2747 sta->flags |= WLAN_STA_ASSOC;
2748 sta->flags &= ~WLAN_STA_WNM_SLEEP_MODE;
2749 if ((!hapd->conf->ieee802_1x && !hapd->conf->wpa && !hapd->conf->osen) ||
2750 sta->auth_alg == WLAN_AUTH_FT) {
2751 /*
2752 * Open, static WEP, or FT protocol; no separate authorization
2753 * step.
2754 */
2755 ap_sta_set_authorized(hapd, sta, 1);
2756 }
2757
2758 if (reassoc)
2759 mlme_reassociate_indication(hapd, sta);
2760 else
2761 mlme_associate_indication(hapd, sta);
2762
2763 #ifdef CONFIG_IEEE80211W
2764 sta->sa_query_timed_out = 0;
2765 #endif /* CONFIG_IEEE80211W */
2766
2767 if (sta->flags & WLAN_STA_WDS) {
2768 int ret;
2769 char ifname_wds[IFNAMSIZ + 1];
2770
2771 ret = hostapd_set_wds_sta(hapd, ifname_wds, sta->addr,
2772 sta->aid, 1);
2773 if (!ret)
2774 hostapd_set_wds_encryption(hapd, sta, ifname_wds);
2775 }
2776
2777 if (sta->eapol_sm == NULL) {
2778 /*
2779 * This STA does not use RADIUS server for EAP authentication,
2780 * so bind it to the selected VLAN interface now, since the
2781 * interface selection is not going to change anymore.
2782 */
2783 if (ap_sta_bind_vlan(hapd, sta) < 0)
2784 return;
2785 } else if (sta->vlan_id) {
2786 /* VLAN ID already set (e.g., by PMKSA caching), so bind STA */
2787 if (ap_sta_bind_vlan(hapd, sta) < 0)
2788 return;
2789 }
2790
2791 hostapd_set_sta_flags(hapd, sta);
2792
2793 if (sta->auth_alg == WLAN_AUTH_FT)
2794 wpa_auth_sm_event(sta->wpa_sm, WPA_ASSOC_FT);
2795 else
2796 wpa_auth_sm_event(sta->wpa_sm, WPA_ASSOC);
2797 hapd->new_assoc_sta_cb(hapd, sta, !new_assoc);
2798 ieee802_1x_notify_port_enabled(sta->eapol_sm, 1);
2799
2800 if (sta->pending_eapol_rx) {
2801 struct os_reltime now, age;
2802
2803 os_get_reltime(&now);
2804 os_reltime_sub(&now, &sta->pending_eapol_rx->rx_time, &age);
2805 if (age.sec == 0 && age.usec < 200000) {
2806 wpa_printf(MSG_DEBUG,
2807 "Process pending EAPOL frame that was received from " MACSTR " just before association notification",
2808 MAC2STR(sta->addr));
2809 ieee802_1x_receive(
2810 hapd, mgmt->da,
2811 wpabuf_head(sta->pending_eapol_rx->buf),
2812 wpabuf_len(sta->pending_eapol_rx->buf));
2813 }
2814 wpabuf_free(sta->pending_eapol_rx->buf);
2815 os_free(sta->pending_eapol_rx);
2816 sta->pending_eapol_rx = NULL;
2817 }
2818 }
2819
2820
handle_deauth_cb(struct hostapd_data * hapd,const struct ieee80211_mgmt * mgmt,size_t len,int ok)2821 static void handle_deauth_cb(struct hostapd_data *hapd,
2822 const struct ieee80211_mgmt *mgmt,
2823 size_t len, int ok)
2824 {
2825 struct sta_info *sta;
2826 if (mgmt->da[0] & 0x01)
2827 return;
2828 sta = ap_get_sta(hapd, mgmt->da);
2829 if (!sta) {
2830 wpa_printf(MSG_DEBUG, "handle_deauth_cb: STA " MACSTR
2831 " not found", MAC2STR(mgmt->da));
2832 return;
2833 }
2834 if (ok)
2835 wpa_printf(MSG_DEBUG, "STA " MACSTR " acknowledged deauth",
2836 MAC2STR(sta->addr));
2837 else
2838 wpa_printf(MSG_DEBUG, "STA " MACSTR " did not acknowledge "
2839 "deauth", MAC2STR(sta->addr));
2840
2841 ap_sta_deauth_cb(hapd, sta);
2842 }
2843
2844
handle_disassoc_cb(struct hostapd_data * hapd,const struct ieee80211_mgmt * mgmt,size_t len,int ok)2845 static void handle_disassoc_cb(struct hostapd_data *hapd,
2846 const struct ieee80211_mgmt *mgmt,
2847 size_t len, int ok)
2848 {
2849 struct sta_info *sta;
2850 if (mgmt->da[0] & 0x01)
2851 return;
2852 sta = ap_get_sta(hapd, mgmt->da);
2853 if (!sta) {
2854 wpa_printf(MSG_DEBUG, "handle_disassoc_cb: STA " MACSTR
2855 " not found", MAC2STR(mgmt->da));
2856 return;
2857 }
2858 if (ok)
2859 wpa_printf(MSG_DEBUG, "STA " MACSTR " acknowledged disassoc",
2860 MAC2STR(sta->addr));
2861 else
2862 wpa_printf(MSG_DEBUG, "STA " MACSTR " did not acknowledge "
2863 "disassoc", MAC2STR(sta->addr));
2864
2865 ap_sta_disassoc_cb(hapd, sta);
2866 }
2867
2868
2869 /**
2870 * ieee802_11_mgmt_cb - Process management frame TX status callback
2871 * @hapd: hostapd BSS data structure (the BSS from which the management frame
2872 * was sent from)
2873 * @buf: management frame data (starting from IEEE 802.11 header)
2874 * @len: length of frame data in octets
2875 * @stype: management frame subtype from frame control field
2876 * @ok: Whether the frame was ACK'ed
2877 */
ieee802_11_mgmt_cb(struct hostapd_data * hapd,const u8 * buf,size_t len,u16 stype,int ok)2878 void ieee802_11_mgmt_cb(struct hostapd_data *hapd, const u8 *buf, size_t len,
2879 u16 stype, int ok)
2880 {
2881 const struct ieee80211_mgmt *mgmt;
2882 mgmt = (const struct ieee80211_mgmt *) buf;
2883
2884 #ifdef CONFIG_TESTING_OPTIONS
2885 if (hapd->ext_mgmt_frame_handling) {
2886 wpa_msg(hapd->msg_ctx, MSG_INFO, "MGMT-TX-STATUS stype=%u ok=%d",
2887 stype, ok);
2888 return;
2889 }
2890 #endif /* CONFIG_TESTING_OPTIONS */
2891
2892 switch (stype) {
2893 case WLAN_FC_STYPE_AUTH:
2894 wpa_printf(MSG_DEBUG, "mgmt::auth cb");
2895 handle_auth_cb(hapd, mgmt, len, ok);
2896 break;
2897 case WLAN_FC_STYPE_ASSOC_RESP:
2898 wpa_printf(MSG_DEBUG, "mgmt::assoc_resp cb");
2899 handle_assoc_cb(hapd, mgmt, len, 0, ok);
2900 break;
2901 case WLAN_FC_STYPE_REASSOC_RESP:
2902 wpa_printf(MSG_DEBUG, "mgmt::reassoc_resp cb");
2903 handle_assoc_cb(hapd, mgmt, len, 1, ok);
2904 break;
2905 case WLAN_FC_STYPE_PROBE_RESP:
2906 wpa_printf(MSG_EXCESSIVE, "mgmt::proberesp cb ok=%d", ok);
2907 break;
2908 case WLAN_FC_STYPE_DEAUTH:
2909 wpa_printf(MSG_DEBUG, "mgmt::deauth cb");
2910 handle_deauth_cb(hapd, mgmt, len, ok);
2911 break;
2912 case WLAN_FC_STYPE_DISASSOC:
2913 wpa_printf(MSG_DEBUG, "mgmt::disassoc cb");
2914 handle_disassoc_cb(hapd, mgmt, len, ok);
2915 break;
2916 case WLAN_FC_STYPE_ACTION:
2917 wpa_printf(MSG_DEBUG, "mgmt::action cb ok=%d", ok);
2918 break;
2919 default:
2920 wpa_printf(MSG_INFO, "unknown mgmt cb frame subtype %d", stype);
2921 break;
2922 }
2923 }
2924
2925
ieee802_11_get_mib(struct hostapd_data * hapd,char * buf,size_t buflen)2926 int ieee802_11_get_mib(struct hostapd_data *hapd, char *buf, size_t buflen)
2927 {
2928 /* TODO */
2929 return 0;
2930 }
2931
2932
ieee802_11_get_mib_sta(struct hostapd_data * hapd,struct sta_info * sta,char * buf,size_t buflen)2933 int ieee802_11_get_mib_sta(struct hostapd_data *hapd, struct sta_info *sta,
2934 char *buf, size_t buflen)
2935 {
2936 /* TODO */
2937 return 0;
2938 }
2939
2940
hostapd_tx_status(struct hostapd_data * hapd,const u8 * addr,const u8 * buf,size_t len,int ack)2941 void hostapd_tx_status(struct hostapd_data *hapd, const u8 *addr,
2942 const u8 *buf, size_t len, int ack)
2943 {
2944 struct sta_info *sta;
2945 struct hostapd_iface *iface = hapd->iface;
2946
2947 sta = ap_get_sta(hapd, addr);
2948 if (sta == NULL && iface->num_bss > 1) {
2949 size_t j;
2950 for (j = 0; j < iface->num_bss; j++) {
2951 hapd = iface->bss[j];
2952 sta = ap_get_sta(hapd, addr);
2953 if (sta)
2954 break;
2955 }
2956 }
2957 if (sta == NULL || !(sta->flags & WLAN_STA_ASSOC))
2958 return;
2959 if (sta->flags & WLAN_STA_PENDING_POLL) {
2960 wpa_printf(MSG_DEBUG, "STA " MACSTR " %s pending "
2961 "activity poll", MAC2STR(sta->addr),
2962 ack ? "ACKed" : "did not ACK");
2963 if (ack)
2964 sta->flags &= ~WLAN_STA_PENDING_POLL;
2965 }
2966
2967 ieee802_1x_tx_status(hapd, sta, buf, len, ack);
2968 }
2969
2970
hostapd_eapol_tx_status(struct hostapd_data * hapd,const u8 * dst,const u8 * data,size_t len,int ack)2971 void hostapd_eapol_tx_status(struct hostapd_data *hapd, const u8 *dst,
2972 const u8 *data, size_t len, int ack)
2973 {
2974 struct sta_info *sta;
2975 struct hostapd_iface *iface = hapd->iface;
2976
2977 sta = ap_get_sta(hapd, dst);
2978 if (sta == NULL && iface->num_bss > 1) {
2979 size_t j;
2980 for (j = 0; j < iface->num_bss; j++) {
2981 hapd = iface->bss[j];
2982 sta = ap_get_sta(hapd, dst);
2983 if (sta)
2984 break;
2985 }
2986 }
2987 if (sta == NULL || !(sta->flags & WLAN_STA_ASSOC)) {
2988 wpa_printf(MSG_DEBUG, "Ignore TX status for Data frame to STA "
2989 MACSTR " that is not currently associated",
2990 MAC2STR(dst));
2991 return;
2992 }
2993
2994 ieee802_1x_eapol_tx_status(hapd, sta, data, len, ack);
2995 }
2996
2997
hostapd_client_poll_ok(struct hostapd_data * hapd,const u8 * addr)2998 void hostapd_client_poll_ok(struct hostapd_data *hapd, const u8 *addr)
2999 {
3000 struct sta_info *sta;
3001 struct hostapd_iface *iface = hapd->iface;
3002
3003 sta = ap_get_sta(hapd, addr);
3004 if (sta == NULL && iface->num_bss > 1) {
3005 size_t j;
3006 for (j = 0; j < iface->num_bss; j++) {
3007 hapd = iface->bss[j];
3008 sta = ap_get_sta(hapd, addr);
3009 if (sta)
3010 break;
3011 }
3012 }
3013 if (sta == NULL)
3014 return;
3015 if (!(sta->flags & WLAN_STA_PENDING_POLL))
3016 return;
3017
3018 wpa_printf(MSG_DEBUG, "STA " MACSTR " ACKed pending "
3019 "activity poll", MAC2STR(sta->addr));
3020 sta->flags &= ~WLAN_STA_PENDING_POLL;
3021 }
3022
3023
ieee802_11_rx_from_unknown(struct hostapd_data * hapd,const u8 * src,int wds)3024 void ieee802_11_rx_from_unknown(struct hostapd_data *hapd, const u8 *src,
3025 int wds)
3026 {
3027 struct sta_info *sta;
3028
3029 sta = ap_get_sta(hapd, src);
3030 if (sta && (sta->flags & WLAN_STA_ASSOC)) {
3031 if (!hapd->conf->wds_sta)
3032 return;
3033
3034 if (wds && !(sta->flags & WLAN_STA_WDS)) {
3035 int ret;
3036 char ifname_wds[IFNAMSIZ + 1];
3037
3038 wpa_printf(MSG_DEBUG, "Enable 4-address WDS mode for "
3039 "STA " MACSTR " (aid %u)",
3040 MAC2STR(sta->addr), sta->aid);
3041 sta->flags |= WLAN_STA_WDS;
3042 ret = hostapd_set_wds_sta(hapd, ifname_wds,
3043 sta->addr, sta->aid, 1);
3044 if (!ret)
3045 hostapd_set_wds_encryption(hapd, sta,
3046 ifname_wds);
3047 }
3048 return;
3049 }
3050
3051 wpa_printf(MSG_DEBUG, "Data/PS-poll frame from not associated STA "
3052 MACSTR, MAC2STR(src));
3053 if (src[0] & 0x01) {
3054 /* Broadcast bit set in SA?! Ignore the frame silently. */
3055 return;
3056 }
3057
3058 if (sta && (sta->flags & WLAN_STA_ASSOC_REQ_OK)) {
3059 wpa_printf(MSG_DEBUG, "Association Response to the STA has "
3060 "already been sent, but no TX status yet known - "
3061 "ignore Class 3 frame issue with " MACSTR,
3062 MAC2STR(src));
3063 return;
3064 }
3065
3066 if (sta && (sta->flags & WLAN_STA_AUTH))
3067 hostapd_drv_sta_disassoc(
3068 hapd, src,
3069 WLAN_REASON_CLASS3_FRAME_FROM_NONASSOC_STA);
3070 else
3071 hostapd_drv_sta_deauth(
3072 hapd, src,
3073 WLAN_REASON_CLASS3_FRAME_FROM_NONASSOC_STA);
3074 }
3075
3076
3077 #endif /* CONFIG_NATIVE_WINDOWS */
3078