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SAE: Centralize function for sending initial COMMIT
[thirdparty/hostap.git] / src / ap / ieee802_11.c
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 "hostapd.h"
27 #include "beacon.h"
28 #include "ieee802_11_auth.h"
29 #include "sta_info.h"
30 #include "ieee802_1x.h"
31 #include "wpa_auth.h"
32 #include "pmksa_cache_auth.h"
33 #include "wmm.h"
34 #include "ap_list.h"
35 #include "accounting.h"
36 #include "ap_config.h"
37 #include "ap_mlme.h"
38 #include "p2p_hostapd.h"
39 #include "ap_drv_ops.h"
40 #include "wnm_ap.h"
41 #include "ieee802_11.h"
42 #include "dfs.h"
43
44
45 u8 * hostapd_eid_supp_rates(struct hostapd_data *hapd, u8 *eid)
46 {
47 u8 *pos = eid;
48 int i, num, count;
49
50 if (hapd->iface->current_rates == NULL)
51 return eid;
52
53 *pos++ = WLAN_EID_SUPP_RATES;
54 num = hapd->iface->num_rates;
55 if (hapd->iconf->ieee80211n && hapd->iconf->require_ht)
56 num++;
57 if (hapd->iconf->ieee80211ac && hapd->iconf->require_vht)
58 num++;
59 if (num > 8) {
60 /* rest of the rates are encoded in Extended supported
61 * rates element */
62 num = 8;
63 }
64
65 *pos++ = num;
66 for (i = 0, count = 0; i < hapd->iface->num_rates && count < num;
67 i++) {
68 count++;
69 *pos = hapd->iface->current_rates[i].rate / 5;
70 if (hapd->iface->current_rates[i].flags & HOSTAPD_RATE_BASIC)
71 *pos |= 0x80;
72 pos++;
73 }
74
75 if (hapd->iconf->ieee80211n && hapd->iconf->require_ht && count < 8) {
76 count++;
77 *pos++ = 0x80 | BSS_MEMBERSHIP_SELECTOR_HT_PHY;
78 }
79
80 if (hapd->iconf->ieee80211ac && hapd->iconf->require_vht && count < 8) {
81 count++;
82 *pos++ = 0x80 | BSS_MEMBERSHIP_SELECTOR_VHT_PHY;
83 }
84
85 return pos;
86 }
87
88
89 u8 * hostapd_eid_ext_supp_rates(struct hostapd_data *hapd, u8 *eid)
90 {
91 u8 *pos = eid;
92 int i, num, count;
93
94 if (hapd->iface->current_rates == NULL)
95 return eid;
96
97 num = hapd->iface->num_rates;
98 if (hapd->iconf->ieee80211n && hapd->iconf->require_ht)
99 num++;
100 if (hapd->iconf->ieee80211ac && hapd->iconf->require_vht)
101 num++;
102 if (num <= 8)
103 return eid;
104 num -= 8;
105
106 *pos++ = WLAN_EID_EXT_SUPP_RATES;
107 *pos++ = num;
108 for (i = 0, count = 0; i < hapd->iface->num_rates && count < num + 8;
109 i++) {
110 count++;
111 if (count <= 8)
112 continue; /* already in SuppRates IE */
113 *pos = hapd->iface->current_rates[i].rate / 5;
114 if (hapd->iface->current_rates[i].flags & HOSTAPD_RATE_BASIC)
115 *pos |= 0x80;
116 pos++;
117 }
118
119 if (hapd->iconf->ieee80211n && hapd->iconf->require_ht) {
120 count++;
121 if (count > 8)
122 *pos++ = 0x80 | BSS_MEMBERSHIP_SELECTOR_HT_PHY;
123 }
124
125 if (hapd->iconf->ieee80211ac && hapd->iconf->require_vht) {
126 count++;
127 if (count > 8)
128 *pos++ = 0x80 | BSS_MEMBERSHIP_SELECTOR_VHT_PHY;
129 }
130
131 return pos;
132 }
133
134
135 u16 hostapd_own_capab_info(struct hostapd_data *hapd, struct sta_info *sta,
136 int probe)
137 {
138 int capab = WLAN_CAPABILITY_ESS;
139 int privacy;
140 int dfs;
141
142 /* Check if any of configured channels require DFS */
143 dfs = hostapd_is_dfs_required(hapd->iface);
144 if (dfs < 0) {
145 wpa_printf(MSG_WARNING, "Failed to check if DFS is required; ret=%d",
146 dfs);
147 dfs = 0;
148 }
149
150 if (hapd->iface->num_sta_no_short_preamble == 0 &&
151 hapd->iconf->preamble == SHORT_PREAMBLE)
152 capab |= WLAN_CAPABILITY_SHORT_PREAMBLE;
153
154 privacy = hapd->conf->ssid.wep.keys_set;
155
156 if (hapd->conf->ieee802_1x &&
157 (hapd->conf->default_wep_key_len ||
158 hapd->conf->individual_wep_key_len))
159 privacy = 1;
160
161 if (hapd->conf->wpa)
162 privacy = 1;
163
164 #ifdef CONFIG_HS20
165 if (hapd->conf->osen)
166 privacy = 1;
167 #endif /* CONFIG_HS20 */
168
169 if (sta) {
170 int policy, def_klen;
171 if (probe && sta->ssid_probe) {
172 policy = sta->ssid_probe->security_policy;
173 def_klen = sta->ssid_probe->wep.default_len;
174 } else {
175 policy = sta->ssid->security_policy;
176 def_klen = sta->ssid->wep.default_len;
177 }
178 privacy = policy != SECURITY_PLAINTEXT;
179 if (policy == SECURITY_IEEE_802_1X && def_klen == 0)
180 privacy = 0;
181 }
182
183 if (privacy)
184 capab |= WLAN_CAPABILITY_PRIVACY;
185
186 if (hapd->iface->current_mode &&
187 hapd->iface->current_mode->mode == HOSTAPD_MODE_IEEE80211G &&
188 hapd->iface->num_sta_no_short_slot_time == 0)
189 capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME;
190
191 /*
192 * Currently, Spectrum Management capability bit is set when directly
193 * requested in configuration by spectrum_mgmt_required or when AP is
194 * running on DFS channel.
195 * TODO: Also consider driver support for TPC to set Spectrum Mgmt bit
196 */
197 if (hapd->iface->current_mode &&
198 hapd->iface->current_mode->mode == HOSTAPD_MODE_IEEE80211A &&
199 (hapd->iconf->spectrum_mgmt_required || dfs))
200 capab |= WLAN_CAPABILITY_SPECTRUM_MGMT;
201
202 if (hapd->conf->radio_measurements)
203 capab |= IEEE80211_CAP_RRM;
204
205 return capab;
206 }
207
208
209 static u16 auth_shared_key(struct hostapd_data *hapd, struct sta_info *sta,
210 u16 auth_transaction, const u8 *challenge,
211 int iswep)
212 {
213 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
214 HOSTAPD_LEVEL_DEBUG,
215 "authentication (shared key, transaction %d)",
216 auth_transaction);
217
218 if (auth_transaction == 1) {
219 if (!sta->challenge) {
220 /* Generate a pseudo-random challenge */
221 u8 key[8];
222 struct os_time now;
223 int r;
224 sta->challenge = os_zalloc(WLAN_AUTH_CHALLENGE_LEN);
225 if (sta->challenge == NULL)
226 return WLAN_STATUS_UNSPECIFIED_FAILURE;
227
228 os_get_time(&now);
229 r = os_random();
230 os_memcpy(key, &now.sec, 4);
231 os_memcpy(key + 4, &r, 4);
232 rc4_skip(key, sizeof(key), 0,
233 sta->challenge, WLAN_AUTH_CHALLENGE_LEN);
234 }
235 return 0;
236 }
237
238 if (auth_transaction != 3)
239 return WLAN_STATUS_UNSPECIFIED_FAILURE;
240
241 /* Transaction 3 */
242 if (!iswep || !sta->challenge || !challenge ||
243 os_memcmp_const(sta->challenge, challenge,
244 WLAN_AUTH_CHALLENGE_LEN)) {
245 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
246 HOSTAPD_LEVEL_INFO,
247 "shared key authentication - invalid "
248 "challenge-response");
249 return WLAN_STATUS_CHALLENGE_FAIL;
250 }
251
252 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
253 HOSTAPD_LEVEL_DEBUG,
254 "authentication OK (shared key)");
255 sta->flags |= WLAN_STA_AUTH;
256 wpa_auth_sm_event(sta->wpa_sm, WPA_AUTH);
257 os_free(sta->challenge);
258 sta->challenge = NULL;
259
260 return 0;
261 }
262
263
264 static void send_auth_reply(struct hostapd_data *hapd,
265 const u8 *dst, const u8 *bssid,
266 u16 auth_alg, u16 auth_transaction, u16 resp,
267 const u8 *ies, size_t ies_len)
268 {
269 struct ieee80211_mgmt *reply;
270 u8 *buf;
271 size_t rlen;
272
273 rlen = IEEE80211_HDRLEN + sizeof(reply->u.auth) + ies_len;
274 buf = os_zalloc(rlen);
275 if (buf == NULL)
276 return;
277
278 reply = (struct ieee80211_mgmt *) buf;
279 reply->frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
280 WLAN_FC_STYPE_AUTH);
281 os_memcpy(reply->da, dst, ETH_ALEN);
282 os_memcpy(reply->sa, hapd->own_addr, ETH_ALEN);
283 os_memcpy(reply->bssid, bssid, ETH_ALEN);
284
285 reply->u.auth.auth_alg = host_to_le16(auth_alg);
286 reply->u.auth.auth_transaction = host_to_le16(auth_transaction);
287 reply->u.auth.status_code = host_to_le16(resp);
288
289 if (ies && ies_len)
290 os_memcpy(reply->u.auth.variable, ies, ies_len);
291
292 wpa_printf(MSG_DEBUG, "authentication reply: STA=" MACSTR
293 " auth_alg=%d auth_transaction=%d resp=%d (IE len=%lu)",
294 MAC2STR(dst), auth_alg, auth_transaction,
295 resp, (unsigned long) ies_len);
296 if (hostapd_drv_send_mlme(hapd, reply, rlen, 0) < 0)
297 wpa_printf(MSG_INFO, "send_auth_reply: send");
298
299 os_free(buf);
300 }
301
302
303 #ifdef CONFIG_IEEE80211R
304 static void handle_auth_ft_finish(void *ctx, const u8 *dst, const u8 *bssid,
305 u16 auth_transaction, u16 status,
306 const u8 *ies, size_t ies_len)
307 {
308 struct hostapd_data *hapd = ctx;
309 struct sta_info *sta;
310
311 send_auth_reply(hapd, dst, bssid, WLAN_AUTH_FT, auth_transaction,
312 status, ies, ies_len);
313
314 if (status != WLAN_STATUS_SUCCESS)
315 return;
316
317 sta = ap_get_sta(hapd, dst);
318 if (sta == NULL)
319 return;
320
321 hostapd_logger(hapd, dst, HOSTAPD_MODULE_IEEE80211,
322 HOSTAPD_LEVEL_DEBUG, "authentication OK (FT)");
323 sta->flags |= WLAN_STA_AUTH;
324 mlme_authenticate_indication(hapd, sta);
325 }
326 #endif /* CONFIG_IEEE80211R */
327
328
329 #ifdef CONFIG_SAE
330
331 static struct wpabuf * auth_build_sae_commit(struct hostapd_data *hapd,
332 struct sta_info *sta, int update)
333 {
334 struct wpabuf *buf;
335
336 if (hapd->conf->ssid.wpa_passphrase == NULL) {
337 wpa_printf(MSG_DEBUG, "SAE: No password available");
338 return NULL;
339 }
340
341 if (update &&
342 sae_prepare_commit(hapd->own_addr, sta->addr,
343 (u8 *) hapd->conf->ssid.wpa_passphrase,
344 os_strlen(hapd->conf->ssid.wpa_passphrase),
345 sta->sae) < 0) {
346 wpa_printf(MSG_DEBUG, "SAE: Could not pick PWE");
347 return NULL;
348 }
349
350 buf = wpabuf_alloc(SAE_COMMIT_MAX_LEN);
351 if (buf == NULL)
352 return NULL;
353 sae_write_commit(sta->sae, buf, sta->sae->tmp ?
354 sta->sae->tmp->anti_clogging_token : NULL);
355
356 return buf;
357 }
358
359
360 static struct wpabuf * auth_build_sae_confirm(struct hostapd_data *hapd,
361 struct sta_info *sta)
362 {
363 struct wpabuf *buf;
364
365 buf = wpabuf_alloc(SAE_CONFIRM_MAX_LEN);
366 if (buf == NULL)
367 return NULL;
368
369 sae_write_confirm(sta->sae, buf);
370
371 return buf;
372 }
373
374
375 static int auth_sae_send_commit(struct hostapd_data *hapd,
376 struct sta_info *sta,
377 const u8 *bssid, int update)
378 {
379 struct wpabuf *data;
380
381 data = auth_build_sae_commit(hapd, sta, update);
382 if (data == NULL)
383 return WLAN_STATUS_UNSPECIFIED_FAILURE;
384
385 send_auth_reply(hapd, sta->addr, bssid,
386 WLAN_AUTH_SAE, 1, WLAN_STATUS_SUCCESS,
387 wpabuf_head(data), wpabuf_len(data));
388
389 wpabuf_free(data);
390
391 return WLAN_STATUS_SUCCESS;
392 }
393
394
395 static int auth_sae_send_confirm(struct hostapd_data *hapd,
396 struct sta_info *sta,
397 const u8 *bssid)
398 {
399 struct wpabuf *data;
400
401 data = auth_build_sae_confirm(hapd, sta);
402 if (data == NULL)
403 return WLAN_STATUS_UNSPECIFIED_FAILURE;
404
405 send_auth_reply(hapd, sta->addr, bssid,
406 WLAN_AUTH_SAE, 2, WLAN_STATUS_SUCCESS,
407 wpabuf_head(data), wpabuf_len(data));
408
409 wpabuf_free(data);
410
411 return WLAN_STATUS_SUCCESS;
412 }
413
414
415 static int use_sae_anti_clogging(struct hostapd_data *hapd)
416 {
417 struct sta_info *sta;
418 unsigned int open = 0;
419
420 if (hapd->conf->sae_anti_clogging_threshold == 0)
421 return 1;
422
423 for (sta = hapd->sta_list; sta; sta = sta->next) {
424 if (!sta->sae)
425 continue;
426 if (sta->sae->state != SAE_COMMITTED &&
427 sta->sae->state != SAE_CONFIRMED)
428 continue;
429 open++;
430 if (open >= hapd->conf->sae_anti_clogging_threshold)
431 return 1;
432 }
433
434 return 0;
435 }
436
437
438 static int check_sae_token(struct hostapd_data *hapd, const u8 *addr,
439 const u8 *token, size_t token_len)
440 {
441 u8 mac[SHA256_MAC_LEN];
442
443 if (token_len != SHA256_MAC_LEN)
444 return -1;
445 if (hmac_sha256(hapd->sae_token_key, sizeof(hapd->sae_token_key),
446 addr, ETH_ALEN, mac) < 0 ||
447 os_memcmp_const(token, mac, SHA256_MAC_LEN) != 0)
448 return -1;
449
450 return 0;
451 }
452
453
454 static struct wpabuf * auth_build_token_req(struct hostapd_data *hapd,
455 int group, const u8 *addr)
456 {
457 struct wpabuf *buf;
458 u8 *token;
459 struct os_reltime now;
460
461 os_get_reltime(&now);
462 if (!os_reltime_initialized(&hapd->last_sae_token_key_update) ||
463 os_reltime_expired(&now, &hapd->last_sae_token_key_update, 60)) {
464 if (random_get_bytes(hapd->sae_token_key,
465 sizeof(hapd->sae_token_key)) < 0)
466 return NULL;
467 wpa_hexdump(MSG_DEBUG, "SAE: Updated token key",
468 hapd->sae_token_key, sizeof(hapd->sae_token_key));
469 hapd->last_sae_token_key_update = now;
470 }
471
472 buf = wpabuf_alloc(sizeof(le16) + SHA256_MAC_LEN);
473 if (buf == NULL)
474 return NULL;
475
476 wpabuf_put_le16(buf, group); /* Finite Cyclic Group */
477
478 token = wpabuf_put(buf, SHA256_MAC_LEN);
479 hmac_sha256(hapd->sae_token_key, sizeof(hapd->sae_token_key),
480 addr, ETH_ALEN, token);
481
482 return buf;
483 }
484
485
486 static int sae_sm_step(struct hostapd_data *hapd, struct sta_info *sta,
487 const u8 *bssid, u8 auth_transaction)
488 {
489 int ret;
490
491 if (auth_transaction != 1 && auth_transaction != 2)
492 return WLAN_STATUS_UNSPECIFIED_FAILURE;
493
494 switch (sta->sae->state) {
495 case SAE_NOTHING:
496 if (auth_transaction == 1) {
497 ret = auth_sae_send_commit(hapd, sta, bssid, 1);
498 if (ret)
499 return ret;
500 sta->sae->state = SAE_COMMITTED;
501
502 if (sae_process_commit(sta->sae) < 0)
503 return WLAN_STATUS_UNSPECIFIED_FAILURE;
504
505 /*
506 * In mesh case, both Commit and Confirm can be sent
507 * immediately. In infrastructure BSS, only a single
508 * Authentication frame (Commit) is expected from the AP
509 * here and the second one (Confirm) will be sent once
510 * the STA has sent its second Authentication frame
511 * (Confirm).
512 */
513 if (hapd->conf->mesh & MESH_ENABLED) {
514 /*
515 * Send both Commit and Confirm immediately
516 * based on SAE finite state machine
517 * Nothing -> Confirm transition.
518 */
519 ret = auth_sae_send_confirm(hapd, sta, bssid);
520 if (ret)
521 return ret;
522 sta->sae->state = SAE_CONFIRMED;
523 } else {
524 /*
525 * For infrastructure BSS, send only the Commit
526 * message now to get alternating sequence of
527 * Authentication frames between the AP and STA.
528 * Confirm will be sent in
529 * Commited -> Confirmed/Accepted transition
530 * when receiving Confirm from STA.
531 */
532 }
533 } else {
534 hostapd_logger(hapd, sta->addr,
535 HOSTAPD_MODULE_IEEE80211,
536 HOSTAPD_LEVEL_DEBUG,
537 "SAE confirm before commit");
538 }
539 break;
540 case SAE_COMMITTED:
541 if (auth_transaction == 1) {
542 if (sae_process_commit(sta->sae) < 0)
543 return WLAN_STATUS_UNSPECIFIED_FAILURE;
544
545 ret = auth_sae_send_confirm(hapd, sta, bssid);
546 if (ret)
547 return ret;
548 sta->sae->state = SAE_CONFIRMED;
549 } else if (hapd->conf->mesh & MESH_ENABLED) {
550 /*
551 * In mesh case, follow SAE finite state machine and
552 * send Commit now.
553 */
554 ret = auth_sae_send_commit(hapd, sta, bssid, 1);
555 if (ret)
556 return ret;
557 } else {
558 /*
559 * For instructure BSS, send the postponed Confirm from
560 * Nothing -> Confirmed transition that was reduced to
561 * Nothing -> Committed above.
562 */
563 ret = auth_sae_send_confirm(hapd, sta, bssid);
564 if (ret)
565 return ret;
566
567 sta->sae->state = SAE_CONFIRMED;
568
569 /*
570 * Since this was triggered on Confirm RX, run another
571 * step to get to Accepted without waiting for
572 * additional events.
573 */
574 return sae_sm_step(hapd, sta, bssid, auth_transaction);
575 }
576 break;
577 case SAE_CONFIRMED:
578 if (auth_transaction == 1) {
579 ret = auth_sae_send_commit(hapd, sta, bssid, 1);
580 if (ret)
581 return ret;
582
583 if (sae_process_commit(sta->sae) < 0)
584 return WLAN_STATUS_UNSPECIFIED_FAILURE;
585
586 ret = auth_sae_send_confirm(hapd, sta, bssid);
587 if (ret)
588 return ret;
589 } else {
590 sta->flags |= WLAN_STA_AUTH;
591 sta->auth_alg = WLAN_AUTH_SAE;
592 mlme_authenticate_indication(hapd, sta);
593 wpa_auth_sm_event(sta->wpa_sm, WPA_AUTH);
594 sta->sae->state = SAE_ACCEPTED;
595 wpa_auth_pmksa_add_sae(hapd->wpa_auth, sta->addr,
596 sta->sae->pmk);
597 }
598 break;
599 case SAE_ACCEPTED:
600 if (auth_transaction == 1) {
601 wpa_printf(MSG_DEBUG, "SAE: remove the STA (" MACSTR
602 ") doing reauthentication",
603 MAC2STR(sta->addr));
604 ap_free_sta(hapd, sta);
605 } else {
606 ret = auth_sae_send_confirm(hapd, sta, bssid);
607 sae_clear_temp_data(sta->sae);
608 if (ret)
609 return ret;
610 }
611 break;
612 default:
613 wpa_printf(MSG_ERROR, "SAE: invalid state %d",
614 sta->sae->state);
615 return WLAN_STATUS_UNSPECIFIED_FAILURE;
616 }
617 return WLAN_STATUS_SUCCESS;
618 }
619
620
621 static void handle_auth_sae(struct hostapd_data *hapd, struct sta_info *sta,
622 const struct ieee80211_mgmt *mgmt, size_t len,
623 u16 auth_transaction, u16 status_code)
624 {
625 u16 resp = WLAN_STATUS_SUCCESS;
626 struct wpabuf *data = NULL;
627
628 if (!sta->sae) {
629 if (auth_transaction != 1 || status_code != WLAN_STATUS_SUCCESS)
630 return;
631 sta->sae = os_zalloc(sizeof(*sta->sae));
632 if (sta->sae == NULL)
633 return;
634 sta->sae->state = SAE_NOTHING;
635 }
636
637 if (auth_transaction == 1) {
638 const u8 *token = NULL, *pos, *end;
639 size_t token_len = 0;
640 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
641 HOSTAPD_LEVEL_DEBUG,
642 "start SAE authentication (RX commit, status=%u)",
643 status_code);
644
645 if ((hapd->conf->mesh & MESH_ENABLED) &&
646 status_code == WLAN_STATUS_ANTI_CLOGGING_TOKEN_REQ &&
647 sta->sae->tmp) {
648 pos = mgmt->u.auth.variable;
649 end = ((const u8 *) mgmt) + len;
650 if (pos + sizeof(le16) > end) {
651 wpa_printf(MSG_ERROR,
652 "SAE: Too short anti-clogging token request");
653 resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
654 goto reply;
655 }
656 resp = sae_group_allowed(sta->sae,
657 hapd->conf->sae_groups,
658 WPA_GET_LE16(pos));
659 if (resp != WLAN_STATUS_SUCCESS) {
660 wpa_printf(MSG_ERROR,
661 "SAE: Invalid group in anti-clogging token request");
662 goto reply;
663 }
664 pos += sizeof(le16);
665
666 wpabuf_free(sta->sae->tmp->anti_clogging_token);
667 sta->sae->tmp->anti_clogging_token =
668 wpabuf_alloc_copy(pos, end - pos);
669 if (sta->sae->tmp->anti_clogging_token == NULL) {
670 wpa_printf(MSG_ERROR,
671 "SAE: Failed to alloc for anti-clogging token");
672 return;
673 }
674
675 /*
676 * IEEE Std 802.11-2012, 11.3.8.6.4: If the Status code
677 * is 76, a new Commit Message shall be constructed
678 * with the Anti-Clogging Token from the received
679 * Authentication frame, and the commit-scalar and
680 * COMMIT-ELEMENT previously sent.
681 */
682 if (auth_sae_send_commit(hapd, sta, mgmt->bssid, 0)) {
683 wpa_printf(MSG_ERROR,
684 "SAE: Failed to send commit message");
685 return;
686 }
687 sta->sae->state = SAE_COMMITTED;
688 return;
689 }
690
691 if (status_code != WLAN_STATUS_SUCCESS)
692 return;
693
694 resp = sae_parse_commit(sta->sae, mgmt->u.auth.variable,
695 ((const u8 *) mgmt) + len -
696 mgmt->u.auth.variable, &token,
697 &token_len, hapd->conf->sae_groups);
698 if (token && check_sae_token(hapd, sta->addr, token, token_len)
699 < 0) {
700 wpa_printf(MSG_DEBUG, "SAE: Drop commit message with "
701 "incorrect token from " MACSTR,
702 MAC2STR(sta->addr));
703 return;
704 }
705
706 if (resp != WLAN_STATUS_SUCCESS)
707 goto reply;
708
709 if (!token && use_sae_anti_clogging(hapd)) {
710 wpa_printf(MSG_DEBUG,
711 "SAE: Request anti-clogging token from "
712 MACSTR, MAC2STR(sta->addr));
713 data = auth_build_token_req(hapd, sta->sae->group,
714 sta->addr);
715 resp = WLAN_STATUS_ANTI_CLOGGING_TOKEN_REQ;
716 if (hapd->conf->mesh & MESH_ENABLED)
717 sta->sae->state = SAE_NOTHING;
718 goto reply;
719 }
720
721 resp = sae_sm_step(hapd, sta, mgmt->bssid, auth_transaction);
722 } else if (auth_transaction == 2) {
723 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
724 HOSTAPD_LEVEL_DEBUG,
725 "SAE authentication (RX confirm, status=%u)",
726 status_code);
727 if (status_code != WLAN_STATUS_SUCCESS)
728 return;
729 if (sta->sae->state >= SAE_CONFIRMED ||
730 !(hapd->conf->mesh & MESH_ENABLED)) {
731 if (sae_check_confirm(sta->sae, mgmt->u.auth.variable,
732 ((u8 *) mgmt) + len -
733 mgmt->u.auth.variable) < 0) {
734 resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
735 goto reply;
736 }
737 }
738 resp = sae_sm_step(hapd, sta, mgmt->bssid, auth_transaction);
739 } else {
740 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
741 HOSTAPD_LEVEL_DEBUG,
742 "unexpected SAE authentication transaction %u (status=%u)",
743 auth_transaction, status_code);
744 if (status_code != WLAN_STATUS_SUCCESS)
745 return;
746 resp = WLAN_STATUS_UNKNOWN_AUTH_TRANSACTION;
747 }
748
749 reply:
750 if (resp != WLAN_STATUS_SUCCESS) {
751 send_auth_reply(hapd, mgmt->sa, mgmt->bssid, WLAN_AUTH_SAE,
752 auth_transaction, resp,
753 data ? wpabuf_head(data) : (u8 *) "",
754 data ? wpabuf_len(data) : 0);
755 }
756 wpabuf_free(data);
757 }
758
759
760 /**
761 * auth_sae_init_committed - Send COMMIT and start SAE in committed state
762 * @hapd: BSS data for the device initiating the authentication
763 * @sta: the peer to which commit authentication frame is sent
764 *
765 * This function implements Init event handling (IEEE Std 802.11-2012,
766 * 11.3.8.6.3) in which initial COMMIT message is sent. Prior to calling, the
767 * sta->sae structure should be initialized appropriately via a call to
768 * sae_prepare_commit().
769 */
770 int auth_sae_init_committed(struct hostapd_data *hapd, struct sta_info *sta)
771 {
772 int ret;
773
774 if (!sta->sae || !sta->sae->tmp)
775 return -1;
776
777 if (sta->sae->state != SAE_NOTHING)
778 return -1;
779
780 ret = auth_sae_send_commit(hapd, sta, hapd->own_addr, 0);
781 if (ret)
782 return -1;
783
784 sta->sae->state = SAE_COMMITTED;
785
786 return 0;
787 }
788
789 #endif /* CONFIG_SAE */
790
791
792 static void handle_auth(struct hostapd_data *hapd,
793 const struct ieee80211_mgmt *mgmt, size_t len)
794 {
795 u16 auth_alg, auth_transaction, status_code;
796 u16 resp = WLAN_STATUS_SUCCESS;
797 struct sta_info *sta = NULL;
798 int res;
799 u16 fc;
800 const u8 *challenge = NULL;
801 u32 session_timeout, acct_interim_interval;
802 int vlan_id = 0;
803 struct hostapd_sta_wpa_psk_short *psk = NULL;
804 u8 resp_ies[2 + WLAN_AUTH_CHALLENGE_LEN];
805 size_t resp_ies_len = 0;
806 char *identity = NULL;
807 char *radius_cui = NULL;
808 u16 seq_ctrl;
809
810 if (len < IEEE80211_HDRLEN + sizeof(mgmt->u.auth)) {
811 wpa_printf(MSG_INFO, "handle_auth - too short payload (len=%lu)",
812 (unsigned long) len);
813 return;
814 }
815
816 #ifdef CONFIG_TESTING_OPTIONS
817 if (hapd->iconf->ignore_auth_probability > 0.0 &&
818 drand48() < hapd->iconf->ignore_auth_probability) {
819 wpa_printf(MSG_INFO,
820 "TESTING: ignoring auth frame from " MACSTR,
821 MAC2STR(mgmt->sa));
822 return;
823 }
824 #endif /* CONFIG_TESTING_OPTIONS */
825
826 auth_alg = le_to_host16(mgmt->u.auth.auth_alg);
827 auth_transaction = le_to_host16(mgmt->u.auth.auth_transaction);
828 status_code = le_to_host16(mgmt->u.auth.status_code);
829 fc = le_to_host16(mgmt->frame_control);
830 seq_ctrl = le_to_host16(mgmt->seq_ctrl);
831
832 if (len >= IEEE80211_HDRLEN + sizeof(mgmt->u.auth) +
833 2 + WLAN_AUTH_CHALLENGE_LEN &&
834 mgmt->u.auth.variable[0] == WLAN_EID_CHALLENGE &&
835 mgmt->u.auth.variable[1] == WLAN_AUTH_CHALLENGE_LEN)
836 challenge = &mgmt->u.auth.variable[2];
837
838 wpa_printf(MSG_DEBUG, "authentication: STA=" MACSTR " auth_alg=%d "
839 "auth_transaction=%d status_code=%d wep=%d%s "
840 "seq_ctrl=0x%x%s",
841 MAC2STR(mgmt->sa), auth_alg, auth_transaction,
842 status_code, !!(fc & WLAN_FC_ISWEP),
843 challenge ? " challenge" : "",
844 seq_ctrl, (fc & WLAN_FC_RETRY) ? " retry" : "");
845
846 if (hapd->tkip_countermeasures) {
847 resp = WLAN_REASON_MICHAEL_MIC_FAILURE;
848 goto fail;
849 }
850
851 if (!(((hapd->conf->auth_algs & WPA_AUTH_ALG_OPEN) &&
852 auth_alg == WLAN_AUTH_OPEN) ||
853 #ifdef CONFIG_IEEE80211R
854 (hapd->conf->wpa && wpa_key_mgmt_ft(hapd->conf->wpa_key_mgmt) &&
855 auth_alg == WLAN_AUTH_FT) ||
856 #endif /* CONFIG_IEEE80211R */
857 #ifdef CONFIG_SAE
858 (hapd->conf->wpa && wpa_key_mgmt_sae(hapd->conf->wpa_key_mgmt) &&
859 auth_alg == WLAN_AUTH_SAE) ||
860 #endif /* CONFIG_SAE */
861 ((hapd->conf->auth_algs & WPA_AUTH_ALG_SHARED) &&
862 auth_alg == WLAN_AUTH_SHARED_KEY))) {
863 wpa_printf(MSG_INFO, "Unsupported authentication algorithm (%d)",
864 auth_alg);
865 resp = WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG;
866 goto fail;
867 }
868
869 if (!(auth_transaction == 1 || auth_alg == WLAN_AUTH_SAE ||
870 (auth_alg == WLAN_AUTH_SHARED_KEY && auth_transaction == 3))) {
871 wpa_printf(MSG_INFO, "Unknown authentication transaction number (%d)",
872 auth_transaction);
873 resp = WLAN_STATUS_UNKNOWN_AUTH_TRANSACTION;
874 goto fail;
875 }
876
877 if (os_memcmp(mgmt->sa, hapd->own_addr, ETH_ALEN) == 0) {
878 wpa_printf(MSG_INFO, "Station " MACSTR " not allowed to authenticate",
879 MAC2STR(mgmt->sa));
880 resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
881 goto fail;
882 }
883
884 res = hostapd_allowed_address(hapd, mgmt->sa, (u8 *) mgmt, len,
885 &session_timeout,
886 &acct_interim_interval, &vlan_id,
887 &psk, &identity, &radius_cui);
888
889 if (res == HOSTAPD_ACL_REJECT) {
890 wpa_printf(MSG_INFO, "Station " MACSTR " not allowed to authenticate",
891 MAC2STR(mgmt->sa));
892 resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
893 goto fail;
894 }
895 if (res == HOSTAPD_ACL_PENDING) {
896 wpa_printf(MSG_DEBUG, "Authentication frame from " MACSTR
897 " waiting for an external authentication",
898 MAC2STR(mgmt->sa));
899 /* Authentication code will re-send the authentication frame
900 * after it has received (and cached) information from the
901 * external source. */
902 return;
903 }
904
905 sta = ap_get_sta(hapd, mgmt->sa);
906 if (sta) {
907 if ((fc & WLAN_FC_RETRY) &&
908 sta->last_seq_ctrl != WLAN_INVALID_MGMT_SEQ &&
909 sta->last_seq_ctrl == seq_ctrl &&
910 sta->last_subtype == WLAN_FC_STYPE_AUTH) {
911 hostapd_logger(hapd, sta->addr,
912 HOSTAPD_MODULE_IEEE80211,
913 HOSTAPD_LEVEL_DEBUG,
914 "Drop repeated authentication frame seq_ctrl=0x%x",
915 seq_ctrl);
916 return;
917 }
918 } else {
919 #ifdef CONFIG_MESH
920 if (hapd->conf->mesh & MESH_ENABLED) {
921 /* if the mesh peer is not available, we don't do auth.
922 */
923 wpa_printf(MSG_DEBUG, "Mesh peer " MACSTR
924 " not yet known - drop Authentiation frame",
925 MAC2STR(mgmt->sa));
926 /*
927 * Save a copy of the frame so that it can be processed
928 * if a new peer entry is added shortly after this.
929 */
930 wpabuf_free(hapd->mesh_pending_auth);
931 hapd->mesh_pending_auth = wpabuf_alloc_copy(mgmt, len);
932 os_get_reltime(&hapd->mesh_pending_auth_time);
933 return;
934 }
935 #endif /* CONFIG_MESH */
936
937 sta = ap_sta_add(hapd, mgmt->sa);
938 if (!sta) {
939 resp = WLAN_STATUS_AP_UNABLE_TO_HANDLE_NEW_STA;
940 goto fail;
941 }
942 }
943 sta->last_seq_ctrl = seq_ctrl;
944 sta->last_subtype = WLAN_FC_STYPE_AUTH;
945
946 if (vlan_id > 0) {
947 if (!hostapd_vlan_id_valid(hapd->conf->vlan, vlan_id)) {
948 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_RADIUS,
949 HOSTAPD_LEVEL_INFO, "Invalid VLAN ID "
950 "%d received from RADIUS server",
951 vlan_id);
952 resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
953 goto fail;
954 }
955 sta->vlan_id = vlan_id;
956 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_RADIUS,
957 HOSTAPD_LEVEL_INFO, "VLAN ID %d", sta->vlan_id);
958 }
959
960 hostapd_free_psk_list(sta->psk);
961 if (hapd->conf->wpa_psk_radius != PSK_RADIUS_IGNORED) {
962 sta->psk = psk;
963 psk = NULL;
964 } else {
965 sta->psk = NULL;
966 }
967
968 sta->identity = identity;
969 identity = NULL;
970 sta->radius_cui = radius_cui;
971 radius_cui = NULL;
972
973 sta->flags &= ~WLAN_STA_PREAUTH;
974 ieee802_1x_notify_pre_auth(sta->eapol_sm, 0);
975
976 if (hapd->conf->acct_interim_interval == 0 && acct_interim_interval)
977 sta->acct_interim_interval = acct_interim_interval;
978 if (res == HOSTAPD_ACL_ACCEPT_TIMEOUT)
979 ap_sta_session_timeout(hapd, sta, session_timeout);
980 else
981 ap_sta_no_session_timeout(hapd, sta);
982
983 switch (auth_alg) {
984 case WLAN_AUTH_OPEN:
985 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
986 HOSTAPD_LEVEL_DEBUG,
987 "authentication OK (open system)");
988 sta->flags |= WLAN_STA_AUTH;
989 wpa_auth_sm_event(sta->wpa_sm, WPA_AUTH);
990 sta->auth_alg = WLAN_AUTH_OPEN;
991 mlme_authenticate_indication(hapd, sta);
992 break;
993 case WLAN_AUTH_SHARED_KEY:
994 resp = auth_shared_key(hapd, sta, auth_transaction, challenge,
995 fc & WLAN_FC_ISWEP);
996 sta->auth_alg = WLAN_AUTH_SHARED_KEY;
997 mlme_authenticate_indication(hapd, sta);
998 if (sta->challenge && auth_transaction == 1) {
999 resp_ies[0] = WLAN_EID_CHALLENGE;
1000 resp_ies[1] = WLAN_AUTH_CHALLENGE_LEN;
1001 os_memcpy(resp_ies + 2, sta->challenge,
1002 WLAN_AUTH_CHALLENGE_LEN);
1003 resp_ies_len = 2 + WLAN_AUTH_CHALLENGE_LEN;
1004 }
1005 break;
1006 #ifdef CONFIG_IEEE80211R
1007 case WLAN_AUTH_FT:
1008 sta->auth_alg = WLAN_AUTH_FT;
1009 if (sta->wpa_sm == NULL)
1010 sta->wpa_sm = wpa_auth_sta_init(hapd->wpa_auth,
1011 sta->addr, NULL);
1012 if (sta->wpa_sm == NULL) {
1013 wpa_printf(MSG_DEBUG, "FT: Failed to initialize WPA "
1014 "state machine");
1015 resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
1016 goto fail;
1017 }
1018 wpa_ft_process_auth(sta->wpa_sm, mgmt->bssid,
1019 auth_transaction, mgmt->u.auth.variable,
1020 len - IEEE80211_HDRLEN -
1021 sizeof(mgmt->u.auth),
1022 handle_auth_ft_finish, hapd);
1023 /* handle_auth_ft_finish() callback will complete auth. */
1024 return;
1025 #endif /* CONFIG_IEEE80211R */
1026 #ifdef CONFIG_SAE
1027 case WLAN_AUTH_SAE:
1028 #ifdef CONFIG_MESH
1029 if (status_code == WLAN_STATUS_SUCCESS &&
1030 hapd->conf->mesh & MESH_ENABLED) {
1031 if (sta->wpa_sm == NULL)
1032 sta->wpa_sm =
1033 wpa_auth_sta_init(hapd->wpa_auth,
1034 sta->addr, NULL);
1035 if (sta->wpa_sm == NULL) {
1036 wpa_printf(MSG_DEBUG,
1037 "SAE: Failed to initialize WPA state machine");
1038 resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
1039 goto fail;
1040 }
1041 }
1042 #endif /* CONFIG_MESH */
1043 handle_auth_sae(hapd, sta, mgmt, len, auth_transaction,
1044 status_code);
1045 return;
1046 #endif /* CONFIG_SAE */
1047 }
1048
1049 fail:
1050 os_free(identity);
1051 os_free(radius_cui);
1052 hostapd_free_psk_list(psk);
1053
1054 send_auth_reply(hapd, mgmt->sa, mgmt->bssid, auth_alg,
1055 auth_transaction + 1, resp, resp_ies, resp_ies_len);
1056 }
1057
1058
1059 static int hostapd_get_aid(struct hostapd_data *hapd, struct sta_info *sta)
1060 {
1061 int i, j = 32, aid;
1062
1063 /* get a unique AID */
1064 if (sta->aid > 0) {
1065 wpa_printf(MSG_DEBUG, " old AID %d", sta->aid);
1066 return 0;
1067 }
1068
1069 for (i = 0; i < AID_WORDS; i++) {
1070 if (hapd->sta_aid[i] == (u32) -1)
1071 continue;
1072 for (j = 0; j < 32; j++) {
1073 if (!(hapd->sta_aid[i] & BIT(j)))
1074 break;
1075 }
1076 if (j < 32)
1077 break;
1078 }
1079 if (j == 32)
1080 return -1;
1081 aid = i * 32 + j + 1;
1082 if (aid > 2007)
1083 return -1;
1084
1085 sta->aid = aid;
1086 hapd->sta_aid[i] |= BIT(j);
1087 wpa_printf(MSG_DEBUG, " new AID %d", sta->aid);
1088 return 0;
1089 }
1090
1091
1092 static u16 check_ssid(struct hostapd_data *hapd, struct sta_info *sta,
1093 const u8 *ssid_ie, size_t ssid_ie_len)
1094 {
1095 if (ssid_ie == NULL)
1096 return WLAN_STATUS_UNSPECIFIED_FAILURE;
1097
1098 if (ssid_ie_len != hapd->conf->ssid.ssid_len ||
1099 os_memcmp(ssid_ie, hapd->conf->ssid.ssid, ssid_ie_len) != 0) {
1100 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
1101 HOSTAPD_LEVEL_INFO,
1102 "Station tried to associate with unknown SSID "
1103 "'%s'", wpa_ssid_txt(ssid_ie, ssid_ie_len));
1104 return WLAN_STATUS_UNSPECIFIED_FAILURE;
1105 }
1106
1107 return WLAN_STATUS_SUCCESS;
1108 }
1109
1110
1111 static u16 check_wmm(struct hostapd_data *hapd, struct sta_info *sta,
1112 const u8 *wmm_ie, size_t wmm_ie_len)
1113 {
1114 sta->flags &= ~WLAN_STA_WMM;
1115 sta->qosinfo = 0;
1116 if (wmm_ie && hapd->conf->wmm_enabled) {
1117 struct wmm_information_element *wmm;
1118
1119 if (!hostapd_eid_wmm_valid(hapd, wmm_ie, wmm_ie_len)) {
1120 hostapd_logger(hapd, sta->addr,
1121 HOSTAPD_MODULE_WPA,
1122 HOSTAPD_LEVEL_DEBUG,
1123 "invalid WMM element in association "
1124 "request");
1125 return WLAN_STATUS_UNSPECIFIED_FAILURE;
1126 }
1127
1128 sta->flags |= WLAN_STA_WMM;
1129 wmm = (struct wmm_information_element *) wmm_ie;
1130 sta->qosinfo = wmm->qos_info;
1131 }
1132 return WLAN_STATUS_SUCCESS;
1133 }
1134
1135
1136 static u16 copy_supp_rates(struct hostapd_data *hapd, struct sta_info *sta,
1137 struct ieee802_11_elems *elems)
1138 {
1139 if (!elems->supp_rates) {
1140 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
1141 HOSTAPD_LEVEL_DEBUG,
1142 "No supported rates element in AssocReq");
1143 return WLAN_STATUS_UNSPECIFIED_FAILURE;
1144 }
1145
1146 if (elems->supp_rates_len + elems->ext_supp_rates_len >
1147 sizeof(sta->supported_rates)) {
1148 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
1149 HOSTAPD_LEVEL_DEBUG,
1150 "Invalid supported rates element length %d+%d",
1151 elems->supp_rates_len,
1152 elems->ext_supp_rates_len);
1153 return WLAN_STATUS_UNSPECIFIED_FAILURE;
1154 }
1155
1156 sta->supported_rates_len = merge_byte_arrays(
1157 sta->supported_rates, sizeof(sta->supported_rates),
1158 elems->supp_rates, elems->supp_rates_len,
1159 elems->ext_supp_rates, elems->ext_supp_rates_len);
1160
1161 return WLAN_STATUS_SUCCESS;
1162 }
1163
1164
1165 static u16 check_ext_capab(struct hostapd_data *hapd, struct sta_info *sta,
1166 const u8 *ext_capab_ie, size_t ext_capab_ie_len)
1167 {
1168 #ifdef CONFIG_INTERWORKING
1169 /* check for QoS Map support */
1170 if (ext_capab_ie_len >= 5) {
1171 if (ext_capab_ie[4] & 0x01)
1172 sta->qos_map_enabled = 1;
1173 }
1174 #endif /* CONFIG_INTERWORKING */
1175
1176 return WLAN_STATUS_SUCCESS;
1177 }
1178
1179
1180 static u16 check_assoc_ies(struct hostapd_data *hapd, struct sta_info *sta,
1181 const u8 *ies, size_t ies_len, int reassoc)
1182 {
1183 struct ieee802_11_elems elems;
1184 u16 resp;
1185 const u8 *wpa_ie;
1186 size_t wpa_ie_len;
1187 const u8 *p2p_dev_addr = NULL;
1188
1189 if (ieee802_11_parse_elems(ies, ies_len, &elems, 1) == ParseFailed) {
1190 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
1191 HOSTAPD_LEVEL_INFO, "Station sent an invalid "
1192 "association request");
1193 return WLAN_STATUS_UNSPECIFIED_FAILURE;
1194 }
1195
1196 resp = check_ssid(hapd, sta, elems.ssid, elems.ssid_len);
1197 if (resp != WLAN_STATUS_SUCCESS)
1198 return resp;
1199 resp = check_wmm(hapd, sta, elems.wmm, elems.wmm_len);
1200 if (resp != WLAN_STATUS_SUCCESS)
1201 return resp;
1202 resp = check_ext_capab(hapd, sta, elems.ext_capab, elems.ext_capab_len);
1203 if (resp != WLAN_STATUS_SUCCESS)
1204 return resp;
1205 resp = copy_supp_rates(hapd, sta, &elems);
1206 if (resp != WLAN_STATUS_SUCCESS)
1207 return resp;
1208 #ifdef CONFIG_IEEE80211N
1209 resp = copy_sta_ht_capab(hapd, sta, elems.ht_capabilities,
1210 elems.ht_capabilities_len);
1211 if (resp != WLAN_STATUS_SUCCESS)
1212 return resp;
1213 if (hapd->iconf->ieee80211n && hapd->iconf->require_ht &&
1214 !(sta->flags & WLAN_STA_HT)) {
1215 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
1216 HOSTAPD_LEVEL_INFO, "Station does not support "
1217 "mandatory HT PHY - reject association");
1218 return WLAN_STATUS_ASSOC_DENIED_NO_HT;
1219 }
1220 #endif /* CONFIG_IEEE80211N */
1221
1222 #ifdef CONFIG_IEEE80211AC
1223 resp = copy_sta_vht_capab(hapd, sta, elems.vht_capabilities,
1224 elems.vht_capabilities_len);
1225 if (resp != WLAN_STATUS_SUCCESS)
1226 return resp;
1227
1228 resp = set_sta_vht_opmode(hapd, sta, elems.vht_opmode_notif);
1229 if (resp != WLAN_STATUS_SUCCESS)
1230 return resp;
1231
1232 if (hapd->iconf->ieee80211ac && hapd->iconf->require_vht &&
1233 !(sta->flags & WLAN_STA_VHT)) {
1234 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
1235 HOSTAPD_LEVEL_INFO, "Station does not support "
1236 "mandatory VHT PHY - reject association");
1237 return WLAN_STATUS_ASSOC_DENIED_NO_VHT;
1238 }
1239 #endif /* CONFIG_IEEE80211AC */
1240
1241 #ifdef CONFIG_P2P
1242 if (elems.p2p) {
1243 wpabuf_free(sta->p2p_ie);
1244 sta->p2p_ie = ieee802_11_vendor_ie_concat(ies, ies_len,
1245 P2P_IE_VENDOR_TYPE);
1246 if (sta->p2p_ie)
1247 p2p_dev_addr = p2p_get_go_dev_addr(sta->p2p_ie);
1248 } else {
1249 wpabuf_free(sta->p2p_ie);
1250 sta->p2p_ie = NULL;
1251 }
1252 #endif /* CONFIG_P2P */
1253
1254 if ((hapd->conf->wpa & WPA_PROTO_RSN) && elems.rsn_ie) {
1255 wpa_ie = elems.rsn_ie;
1256 wpa_ie_len = elems.rsn_ie_len;
1257 } else if ((hapd->conf->wpa & WPA_PROTO_WPA) &&
1258 elems.wpa_ie) {
1259 wpa_ie = elems.wpa_ie;
1260 wpa_ie_len = elems.wpa_ie_len;
1261 } else {
1262 wpa_ie = NULL;
1263 wpa_ie_len = 0;
1264 }
1265
1266 #ifdef CONFIG_WPS
1267 sta->flags &= ~(WLAN_STA_WPS | WLAN_STA_MAYBE_WPS | WLAN_STA_WPS2);
1268 if (hapd->conf->wps_state && elems.wps_ie) {
1269 wpa_printf(MSG_DEBUG, "STA included WPS IE in (Re)Association "
1270 "Request - assume WPS is used");
1271 sta->flags |= WLAN_STA_WPS;
1272 wpabuf_free(sta->wps_ie);
1273 sta->wps_ie = ieee802_11_vendor_ie_concat(ies, ies_len,
1274 WPS_IE_VENDOR_TYPE);
1275 if (sta->wps_ie && wps_is_20(sta->wps_ie)) {
1276 wpa_printf(MSG_DEBUG, "WPS: STA supports WPS 2.0");
1277 sta->flags |= WLAN_STA_WPS2;
1278 }
1279 wpa_ie = NULL;
1280 wpa_ie_len = 0;
1281 if (sta->wps_ie && wps_validate_assoc_req(sta->wps_ie) < 0) {
1282 wpa_printf(MSG_DEBUG, "WPS: Invalid WPS IE in "
1283 "(Re)Association Request - reject");
1284 return WLAN_STATUS_INVALID_IE;
1285 }
1286 } else if (hapd->conf->wps_state && wpa_ie == NULL) {
1287 wpa_printf(MSG_DEBUG, "STA did not include WPA/RSN IE in "
1288 "(Re)Association Request - possible WPS use");
1289 sta->flags |= WLAN_STA_MAYBE_WPS;
1290 } else
1291 #endif /* CONFIG_WPS */
1292 if (hapd->conf->wpa && wpa_ie == NULL) {
1293 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
1294 HOSTAPD_LEVEL_INFO,
1295 "No WPA/RSN IE in association request");
1296 return WLAN_STATUS_INVALID_IE;
1297 }
1298
1299 if (hapd->conf->wpa && wpa_ie) {
1300 int res;
1301 wpa_ie -= 2;
1302 wpa_ie_len += 2;
1303 if (sta->wpa_sm == NULL)
1304 sta->wpa_sm = wpa_auth_sta_init(hapd->wpa_auth,
1305 sta->addr,
1306 p2p_dev_addr);
1307 if (sta->wpa_sm == NULL) {
1308 wpa_printf(MSG_WARNING, "Failed to initialize WPA "
1309 "state machine");
1310 return WLAN_STATUS_UNSPECIFIED_FAILURE;
1311 }
1312 res = wpa_validate_wpa_ie(hapd->wpa_auth, sta->wpa_sm,
1313 wpa_ie, wpa_ie_len,
1314 elems.mdie, elems.mdie_len);
1315 if (res == WPA_INVALID_GROUP)
1316 resp = WLAN_STATUS_GROUP_CIPHER_NOT_VALID;
1317 else if (res == WPA_INVALID_PAIRWISE)
1318 resp = WLAN_STATUS_PAIRWISE_CIPHER_NOT_VALID;
1319 else if (res == WPA_INVALID_AKMP)
1320 resp = WLAN_STATUS_AKMP_NOT_VALID;
1321 else if (res == WPA_ALLOC_FAIL)
1322 resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
1323 #ifdef CONFIG_IEEE80211W
1324 else if (res == WPA_MGMT_FRAME_PROTECTION_VIOLATION)
1325 resp = WLAN_STATUS_ROBUST_MGMT_FRAME_POLICY_VIOLATION;
1326 else if (res == WPA_INVALID_MGMT_GROUP_CIPHER)
1327 resp = WLAN_STATUS_ROBUST_MGMT_FRAME_POLICY_VIOLATION;
1328 #endif /* CONFIG_IEEE80211W */
1329 else if (res == WPA_INVALID_MDIE)
1330 resp = WLAN_STATUS_INVALID_MDIE;
1331 else if (res != WPA_IE_OK)
1332 resp = WLAN_STATUS_INVALID_IE;
1333 if (resp != WLAN_STATUS_SUCCESS)
1334 return resp;
1335 #ifdef CONFIG_IEEE80211W
1336 if ((sta->flags & WLAN_STA_MFP) && !sta->sa_query_timed_out &&
1337 sta->sa_query_count > 0)
1338 ap_check_sa_query_timeout(hapd, sta);
1339 if ((sta->flags & WLAN_STA_MFP) && !sta->sa_query_timed_out &&
1340 (!reassoc || sta->auth_alg != WLAN_AUTH_FT)) {
1341 /*
1342 * STA has already been associated with MFP and SA
1343 * Query timeout has not been reached. Reject the
1344 * association attempt temporarily and start SA Query,
1345 * if one is not pending.
1346 */
1347
1348 if (sta->sa_query_count == 0)
1349 ap_sta_start_sa_query(hapd, sta);
1350
1351 return WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY;
1352 }
1353
1354 if (wpa_auth_uses_mfp(sta->wpa_sm))
1355 sta->flags |= WLAN_STA_MFP;
1356 else
1357 sta->flags &= ~WLAN_STA_MFP;
1358 #endif /* CONFIG_IEEE80211W */
1359
1360 #ifdef CONFIG_IEEE80211R
1361 if (sta->auth_alg == WLAN_AUTH_FT) {
1362 if (!reassoc) {
1363 wpa_printf(MSG_DEBUG, "FT: " MACSTR " tried "
1364 "to use association (not "
1365 "re-association) with FT auth_alg",
1366 MAC2STR(sta->addr));
1367 return WLAN_STATUS_UNSPECIFIED_FAILURE;
1368 }
1369
1370 resp = wpa_ft_validate_reassoc(sta->wpa_sm, ies,
1371 ies_len);
1372 if (resp != WLAN_STATUS_SUCCESS)
1373 return resp;
1374 }
1375 #endif /* CONFIG_IEEE80211R */
1376
1377 #ifdef CONFIG_SAE
1378 if (wpa_auth_uses_sae(sta->wpa_sm) &&
1379 sta->auth_alg == WLAN_AUTH_OPEN) {
1380 struct rsn_pmksa_cache_entry *sa;
1381 sa = wpa_auth_sta_get_pmksa(sta->wpa_sm);
1382 if (!sa || sa->akmp != WPA_KEY_MGMT_SAE) {
1383 wpa_printf(MSG_DEBUG,
1384 "SAE: No PMKSA cache entry found for "
1385 MACSTR, MAC2STR(sta->addr));
1386 return WLAN_STATUS_INVALID_PMKID;
1387 }
1388 wpa_printf(MSG_DEBUG, "SAE: " MACSTR
1389 " using PMKSA caching", MAC2STR(sta->addr));
1390 } else if (wpa_auth_uses_sae(sta->wpa_sm) &&
1391 sta->auth_alg != WLAN_AUTH_SAE &&
1392 !(sta->auth_alg == WLAN_AUTH_FT &&
1393 wpa_auth_uses_ft_sae(sta->wpa_sm))) {
1394 wpa_printf(MSG_DEBUG, "SAE: " MACSTR " tried to use "
1395 "SAE AKM after non-SAE auth_alg %u",
1396 MAC2STR(sta->addr), sta->auth_alg);
1397 return WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG;
1398 }
1399 #endif /* CONFIG_SAE */
1400
1401 #ifdef CONFIG_IEEE80211N
1402 if ((sta->flags & (WLAN_STA_HT | WLAN_STA_VHT)) &&
1403 wpa_auth_get_pairwise(sta->wpa_sm) == WPA_CIPHER_TKIP) {
1404 hostapd_logger(hapd, sta->addr,
1405 HOSTAPD_MODULE_IEEE80211,
1406 HOSTAPD_LEVEL_INFO,
1407 "Station tried to use TKIP with HT "
1408 "association");
1409 return WLAN_STATUS_CIPHER_REJECTED_PER_POLICY;
1410 }
1411 #endif /* CONFIG_IEEE80211N */
1412 #ifdef CONFIG_HS20
1413 } else if (hapd->conf->osen) {
1414 if (elems.osen == NULL) {
1415 hostapd_logger(
1416 hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
1417 HOSTAPD_LEVEL_INFO,
1418 "No HS 2.0 OSEN element in association request");
1419 return WLAN_STATUS_INVALID_IE;
1420 }
1421
1422 wpa_printf(MSG_DEBUG, "HS 2.0: OSEN association");
1423 if (sta->wpa_sm == NULL)
1424 sta->wpa_sm = wpa_auth_sta_init(hapd->wpa_auth,
1425 sta->addr, NULL);
1426 if (sta->wpa_sm == NULL) {
1427 wpa_printf(MSG_WARNING, "Failed to initialize WPA "
1428 "state machine");
1429 return WLAN_STATUS_UNSPECIFIED_FAILURE;
1430 }
1431 if (wpa_validate_osen(hapd->wpa_auth, sta->wpa_sm,
1432 elems.osen - 2, elems.osen_len + 2) < 0)
1433 return WLAN_STATUS_INVALID_IE;
1434 #endif /* CONFIG_HS20 */
1435 } else
1436 wpa_auth_sta_no_wpa(sta->wpa_sm);
1437
1438 #ifdef CONFIG_P2P
1439 p2p_group_notif_assoc(hapd->p2p_group, sta->addr, ies, ies_len);
1440 #endif /* CONFIG_P2P */
1441
1442 #ifdef CONFIG_HS20
1443 wpabuf_free(sta->hs20_ie);
1444 if (elems.hs20 && elems.hs20_len > 4) {
1445 sta->hs20_ie = wpabuf_alloc_copy(elems.hs20 + 4,
1446 elems.hs20_len - 4);
1447 } else
1448 sta->hs20_ie = NULL;
1449 #endif /* CONFIG_HS20 */
1450
1451 return WLAN_STATUS_SUCCESS;
1452 }
1453
1454
1455 static void send_deauth(struct hostapd_data *hapd, const u8 *addr,
1456 u16 reason_code)
1457 {
1458 int send_len;
1459 struct ieee80211_mgmt reply;
1460
1461 os_memset(&reply, 0, sizeof(reply));
1462 reply.frame_control =
1463 IEEE80211_FC(WLAN_FC_TYPE_MGMT, WLAN_FC_STYPE_DEAUTH);
1464 os_memcpy(reply.da, addr, ETH_ALEN);
1465 os_memcpy(reply.sa, hapd->own_addr, ETH_ALEN);
1466 os_memcpy(reply.bssid, hapd->own_addr, ETH_ALEN);
1467
1468 send_len = IEEE80211_HDRLEN + sizeof(reply.u.deauth);
1469 reply.u.deauth.reason_code = host_to_le16(reason_code);
1470
1471 if (hostapd_drv_send_mlme(hapd, &reply, send_len, 0) < 0)
1472 wpa_printf(MSG_INFO, "Failed to send deauth: %s",
1473 strerror(errno));
1474 }
1475
1476
1477 static void send_assoc_resp(struct hostapd_data *hapd, struct sta_info *sta,
1478 u16 status_code, int reassoc, const u8 *ies,
1479 size_t ies_len)
1480 {
1481 int send_len;
1482 u8 buf[sizeof(struct ieee80211_mgmt) + 1024];
1483 struct ieee80211_mgmt *reply;
1484 u8 *p;
1485
1486 os_memset(buf, 0, sizeof(buf));
1487 reply = (struct ieee80211_mgmt *) buf;
1488 reply->frame_control =
1489 IEEE80211_FC(WLAN_FC_TYPE_MGMT,
1490 (reassoc ? WLAN_FC_STYPE_REASSOC_RESP :
1491 WLAN_FC_STYPE_ASSOC_RESP));
1492 os_memcpy(reply->da, sta->addr, ETH_ALEN);
1493 os_memcpy(reply->sa, hapd->own_addr, ETH_ALEN);
1494 os_memcpy(reply->bssid, hapd->own_addr, ETH_ALEN);
1495
1496 send_len = IEEE80211_HDRLEN;
1497 send_len += sizeof(reply->u.assoc_resp);
1498 reply->u.assoc_resp.capab_info =
1499 host_to_le16(hostapd_own_capab_info(hapd, sta, 0));
1500 reply->u.assoc_resp.status_code = host_to_le16(status_code);
1501 reply->u.assoc_resp.aid = host_to_le16(sta->aid | BIT(14) | BIT(15));
1502 /* Supported rates */
1503 p = hostapd_eid_supp_rates(hapd, reply->u.assoc_resp.variable);
1504 /* Extended supported rates */
1505 p = hostapd_eid_ext_supp_rates(hapd, p);
1506
1507 #ifdef CONFIG_IEEE80211R
1508 if (status_code == WLAN_STATUS_SUCCESS) {
1509 /* IEEE 802.11r: Mobility Domain Information, Fast BSS
1510 * Transition Information, RSN, [RIC Response] */
1511 p = wpa_sm_write_assoc_resp_ies(sta->wpa_sm, p,
1512 buf + sizeof(buf) - p,
1513 sta->auth_alg, ies, ies_len);
1514 }
1515 #endif /* CONFIG_IEEE80211R */
1516
1517 #ifdef CONFIG_IEEE80211W
1518 if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY)
1519 p = hostapd_eid_assoc_comeback_time(hapd, sta, p);
1520 #endif /* CONFIG_IEEE80211W */
1521
1522 #ifdef CONFIG_IEEE80211N
1523 p = hostapd_eid_ht_capabilities(hapd, p);
1524 p = hostapd_eid_ht_operation(hapd, p);
1525 #endif /* CONFIG_IEEE80211N */
1526
1527 #ifdef CONFIG_IEEE80211AC
1528 p = hostapd_eid_vht_capabilities(hapd, p);
1529 p = hostapd_eid_vht_operation(hapd, p);
1530 #endif /* CONFIG_IEEE80211AC */
1531
1532 p = hostapd_eid_ext_capab(hapd, p);
1533 p = hostapd_eid_bss_max_idle_period(hapd, p);
1534 if (sta->qos_map_enabled)
1535 p = hostapd_eid_qos_map_set(hapd, p);
1536
1537 if (sta->flags & WLAN_STA_WMM)
1538 p = hostapd_eid_wmm(hapd, p);
1539
1540 #ifdef CONFIG_WPS
1541 if ((sta->flags & WLAN_STA_WPS) ||
1542 ((sta->flags & WLAN_STA_MAYBE_WPS) && hapd->conf->wpa)) {
1543 struct wpabuf *wps = wps_build_assoc_resp_ie();
1544 if (wps) {
1545 os_memcpy(p, wpabuf_head(wps), wpabuf_len(wps));
1546 p += wpabuf_len(wps);
1547 wpabuf_free(wps);
1548 }
1549 }
1550 #endif /* CONFIG_WPS */
1551
1552 #ifdef CONFIG_P2P
1553 if (sta->p2p_ie) {
1554 struct wpabuf *p2p_resp_ie;
1555 enum p2p_status_code status;
1556 switch (status_code) {
1557 case WLAN_STATUS_SUCCESS:
1558 status = P2P_SC_SUCCESS;
1559 break;
1560 case WLAN_STATUS_AP_UNABLE_TO_HANDLE_NEW_STA:
1561 status = P2P_SC_FAIL_LIMIT_REACHED;
1562 break;
1563 default:
1564 status = P2P_SC_FAIL_INVALID_PARAMS;
1565 break;
1566 }
1567 p2p_resp_ie = p2p_group_assoc_resp_ie(hapd->p2p_group, status);
1568 if (p2p_resp_ie) {
1569 os_memcpy(p, wpabuf_head(p2p_resp_ie),
1570 wpabuf_len(p2p_resp_ie));
1571 p += wpabuf_len(p2p_resp_ie);
1572 wpabuf_free(p2p_resp_ie);
1573 }
1574 }
1575 #endif /* CONFIG_P2P */
1576
1577 #ifdef CONFIG_P2P_MANAGER
1578 if (hapd->conf->p2p & P2P_MANAGE)
1579 p = hostapd_eid_p2p_manage(hapd, p);
1580 #endif /* CONFIG_P2P_MANAGER */
1581
1582 send_len += p - reply->u.assoc_resp.variable;
1583
1584 if (hostapd_drv_send_mlme(hapd, reply, send_len, 0) < 0)
1585 wpa_printf(MSG_INFO, "Failed to send assoc resp: %s",
1586 strerror(errno));
1587 }
1588
1589
1590 static void handle_assoc(struct hostapd_data *hapd,
1591 const struct ieee80211_mgmt *mgmt, size_t len,
1592 int reassoc)
1593 {
1594 u16 capab_info, listen_interval, seq_ctrl, fc;
1595 u16 resp = WLAN_STATUS_SUCCESS;
1596 const u8 *pos;
1597 int left, i;
1598 struct sta_info *sta;
1599
1600 if (len < IEEE80211_HDRLEN + (reassoc ? sizeof(mgmt->u.reassoc_req) :
1601 sizeof(mgmt->u.assoc_req))) {
1602 wpa_printf(MSG_INFO, "handle_assoc(reassoc=%d) - too short payload (len=%lu)",
1603 reassoc, (unsigned long) len);
1604 return;
1605 }
1606
1607 #ifdef CONFIG_TESTING_OPTIONS
1608 if (reassoc) {
1609 if (hapd->iconf->ignore_reassoc_probability > 0.0 &&
1610 drand48() < hapd->iconf->ignore_reassoc_probability) {
1611 wpa_printf(MSG_INFO,
1612 "TESTING: ignoring reassoc request from "
1613 MACSTR, MAC2STR(mgmt->sa));
1614 return;
1615 }
1616 } else {
1617 if (hapd->iconf->ignore_assoc_probability > 0.0 &&
1618 drand48() < hapd->iconf->ignore_assoc_probability) {
1619 wpa_printf(MSG_INFO,
1620 "TESTING: ignoring assoc request from "
1621 MACSTR, MAC2STR(mgmt->sa));
1622 return;
1623 }
1624 }
1625 #endif /* CONFIG_TESTING_OPTIONS */
1626
1627 fc = le_to_host16(mgmt->frame_control);
1628 seq_ctrl = le_to_host16(mgmt->seq_ctrl);
1629
1630 if (reassoc) {
1631 capab_info = le_to_host16(mgmt->u.reassoc_req.capab_info);
1632 listen_interval = le_to_host16(
1633 mgmt->u.reassoc_req.listen_interval);
1634 wpa_printf(MSG_DEBUG, "reassociation request: STA=" MACSTR
1635 " capab_info=0x%02x listen_interval=%d current_ap="
1636 MACSTR " seq_ctrl=0x%x%s",
1637 MAC2STR(mgmt->sa), capab_info, listen_interval,
1638 MAC2STR(mgmt->u.reassoc_req.current_ap),
1639 seq_ctrl, (fc & WLAN_FC_RETRY) ? " retry" : "");
1640 left = len - (IEEE80211_HDRLEN + sizeof(mgmt->u.reassoc_req));
1641 pos = mgmt->u.reassoc_req.variable;
1642 } else {
1643 capab_info = le_to_host16(mgmt->u.assoc_req.capab_info);
1644 listen_interval = le_to_host16(
1645 mgmt->u.assoc_req.listen_interval);
1646 wpa_printf(MSG_DEBUG, "association request: STA=" MACSTR
1647 " capab_info=0x%02x listen_interval=%d "
1648 "seq_ctrl=0x%x%s",
1649 MAC2STR(mgmt->sa), capab_info, listen_interval,
1650 seq_ctrl, (fc & WLAN_FC_RETRY) ? " retry" : "");
1651 left = len - (IEEE80211_HDRLEN + sizeof(mgmt->u.assoc_req));
1652 pos = mgmt->u.assoc_req.variable;
1653 }
1654
1655 sta = ap_get_sta(hapd, mgmt->sa);
1656 #ifdef CONFIG_IEEE80211R
1657 if (sta && sta->auth_alg == WLAN_AUTH_FT &&
1658 (sta->flags & WLAN_STA_AUTH) == 0) {
1659 wpa_printf(MSG_DEBUG, "FT: Allow STA " MACSTR " to associate "
1660 "prior to authentication since it is using "
1661 "over-the-DS FT", MAC2STR(mgmt->sa));
1662 } else
1663 #endif /* CONFIG_IEEE80211R */
1664 if (sta == NULL || (sta->flags & WLAN_STA_AUTH) == 0) {
1665 hostapd_logger(hapd, mgmt->sa, HOSTAPD_MODULE_IEEE80211,
1666 HOSTAPD_LEVEL_INFO, "Station tried to "
1667 "associate before authentication "
1668 "(aid=%d flags=0x%x)",
1669 sta ? sta->aid : -1,
1670 sta ? sta->flags : 0);
1671 send_deauth(hapd, mgmt->sa,
1672 WLAN_REASON_CLASS2_FRAME_FROM_NONAUTH_STA);
1673 return;
1674 }
1675
1676 if ((fc & WLAN_FC_RETRY) &&
1677 sta->last_seq_ctrl != WLAN_INVALID_MGMT_SEQ &&
1678 sta->last_seq_ctrl == seq_ctrl &&
1679 sta->last_subtype == reassoc ? WLAN_FC_STYPE_REASSOC_REQ :
1680 WLAN_FC_STYPE_ASSOC_REQ) {
1681 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
1682 HOSTAPD_LEVEL_DEBUG,
1683 "Drop repeated association frame seq_ctrl=0x%x",
1684 seq_ctrl);
1685 return;
1686 }
1687 sta->last_seq_ctrl = seq_ctrl;
1688 sta->last_subtype = reassoc ? WLAN_FC_STYPE_REASSOC_REQ :
1689 WLAN_FC_STYPE_ASSOC_REQ;
1690
1691 if (hapd->tkip_countermeasures) {
1692 resp = WLAN_REASON_MICHAEL_MIC_FAILURE;
1693 goto fail;
1694 }
1695
1696 if (listen_interval > hapd->conf->max_listen_interval) {
1697 hostapd_logger(hapd, mgmt->sa, HOSTAPD_MODULE_IEEE80211,
1698 HOSTAPD_LEVEL_DEBUG,
1699 "Too large Listen Interval (%d)",
1700 listen_interval);
1701 resp = WLAN_STATUS_ASSOC_DENIED_LISTEN_INT_TOO_LARGE;
1702 goto fail;
1703 }
1704
1705 /* followed by SSID and Supported rates; and HT capabilities if 802.11n
1706 * is used */
1707 resp = check_assoc_ies(hapd, sta, pos, left, reassoc);
1708 if (resp != WLAN_STATUS_SUCCESS)
1709 goto fail;
1710
1711 if (hostapd_get_aid(hapd, sta) < 0) {
1712 hostapd_logger(hapd, mgmt->sa, HOSTAPD_MODULE_IEEE80211,
1713 HOSTAPD_LEVEL_INFO, "No room for more AIDs");
1714 resp = WLAN_STATUS_AP_UNABLE_TO_HANDLE_NEW_STA;
1715 goto fail;
1716 }
1717
1718 sta->capability = capab_info;
1719 sta->listen_interval = listen_interval;
1720
1721 if (hapd->iface->current_mode->mode == HOSTAPD_MODE_IEEE80211G)
1722 sta->flags |= WLAN_STA_NONERP;
1723 for (i = 0; i < sta->supported_rates_len; i++) {
1724 if ((sta->supported_rates[i] & 0x7f) > 22) {
1725 sta->flags &= ~WLAN_STA_NONERP;
1726 break;
1727 }
1728 }
1729 if (sta->flags & WLAN_STA_NONERP && !sta->nonerp_set) {
1730 sta->nonerp_set = 1;
1731 hapd->iface->num_sta_non_erp++;
1732 if (hapd->iface->num_sta_non_erp == 1)
1733 ieee802_11_set_beacons(hapd->iface);
1734 }
1735
1736 if (!(sta->capability & WLAN_CAPABILITY_SHORT_SLOT_TIME) &&
1737 !sta->no_short_slot_time_set) {
1738 sta->no_short_slot_time_set = 1;
1739 hapd->iface->num_sta_no_short_slot_time++;
1740 if (hapd->iface->current_mode->mode ==
1741 HOSTAPD_MODE_IEEE80211G &&
1742 hapd->iface->num_sta_no_short_slot_time == 1)
1743 ieee802_11_set_beacons(hapd->iface);
1744 }
1745
1746 if (sta->capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
1747 sta->flags |= WLAN_STA_SHORT_PREAMBLE;
1748 else
1749 sta->flags &= ~WLAN_STA_SHORT_PREAMBLE;
1750
1751 if (!(sta->capability & WLAN_CAPABILITY_SHORT_PREAMBLE) &&
1752 !sta->no_short_preamble_set) {
1753 sta->no_short_preamble_set = 1;
1754 hapd->iface->num_sta_no_short_preamble++;
1755 if (hapd->iface->current_mode->mode == HOSTAPD_MODE_IEEE80211G
1756 && hapd->iface->num_sta_no_short_preamble == 1)
1757 ieee802_11_set_beacons(hapd->iface);
1758 }
1759
1760 #ifdef CONFIG_IEEE80211N
1761 update_ht_state(hapd, sta);
1762 #endif /* CONFIG_IEEE80211N */
1763
1764 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
1765 HOSTAPD_LEVEL_DEBUG,
1766 "association OK (aid %d)", sta->aid);
1767 /* Station will be marked associated, after it acknowledges AssocResp
1768 */
1769 sta->flags |= WLAN_STA_ASSOC_REQ_OK;
1770
1771 #ifdef CONFIG_IEEE80211W
1772 if ((sta->flags & WLAN_STA_MFP) && sta->sa_query_timed_out) {
1773 wpa_printf(MSG_DEBUG, "Allowing %sassociation after timed out "
1774 "SA Query procedure", reassoc ? "re" : "");
1775 /* TODO: Send a protected Disassociate frame to the STA using
1776 * the old key and Reason Code "Previous Authentication no
1777 * longer valid". Make sure this is only sent protected since
1778 * unprotected frame would be received by the STA that is now
1779 * trying to associate.
1780 */
1781 }
1782 #endif /* CONFIG_IEEE80211W */
1783
1784 /* Make sure that the previously registered inactivity timer will not
1785 * remove the STA immediately. */
1786 sta->timeout_next = STA_NULLFUNC;
1787
1788 fail:
1789 send_assoc_resp(hapd, sta, resp, reassoc, pos, left);
1790 }
1791
1792
1793 static void handle_disassoc(struct hostapd_data *hapd,
1794 const struct ieee80211_mgmt *mgmt, size_t len)
1795 {
1796 struct sta_info *sta;
1797
1798 if (len < IEEE80211_HDRLEN + sizeof(mgmt->u.disassoc)) {
1799 wpa_printf(MSG_INFO, "handle_disassoc - too short payload (len=%lu)",
1800 (unsigned long) len);
1801 return;
1802 }
1803
1804 wpa_printf(MSG_DEBUG, "disassocation: STA=" MACSTR " reason_code=%d",
1805 MAC2STR(mgmt->sa),
1806 le_to_host16(mgmt->u.disassoc.reason_code));
1807
1808 sta = ap_get_sta(hapd, mgmt->sa);
1809 if (sta == NULL) {
1810 wpa_printf(MSG_INFO, "Station " MACSTR " trying to disassociate, but it is not associated",
1811 MAC2STR(mgmt->sa));
1812 return;
1813 }
1814
1815 ap_sta_set_authorized(hapd, sta, 0);
1816 sta->last_seq_ctrl = WLAN_INVALID_MGMT_SEQ;
1817 sta->flags &= ~(WLAN_STA_ASSOC | WLAN_STA_ASSOC_REQ_OK);
1818 wpa_auth_sm_event(sta->wpa_sm, WPA_DISASSOC);
1819 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
1820 HOSTAPD_LEVEL_INFO, "disassociated");
1821 sta->acct_terminate_cause = RADIUS_ACCT_TERMINATE_CAUSE_USER_REQUEST;
1822 ieee802_1x_notify_port_enabled(sta->eapol_sm, 0);
1823 /* Stop Accounting and IEEE 802.1X sessions, but leave the STA
1824 * authenticated. */
1825 accounting_sta_stop(hapd, sta);
1826 ieee802_1x_free_station(sta);
1827 if (sta->ipaddr)
1828 hostapd_drv_br_delete_ip_neigh(hapd, 4, (u8 *) &sta->ipaddr);
1829 ap_sta_ip6addr_del(hapd, sta);
1830 hostapd_drv_sta_remove(hapd, sta->addr);
1831
1832 if (sta->timeout_next == STA_NULLFUNC ||
1833 sta->timeout_next == STA_DISASSOC) {
1834 sta->timeout_next = STA_DEAUTH;
1835 eloop_cancel_timeout(ap_handle_timer, hapd, sta);
1836 eloop_register_timeout(AP_DEAUTH_DELAY, 0, ap_handle_timer,
1837 hapd, sta);
1838 }
1839
1840 mlme_disassociate_indication(
1841 hapd, sta, le_to_host16(mgmt->u.disassoc.reason_code));
1842 }
1843
1844
1845 static void handle_deauth(struct hostapd_data *hapd,
1846 const struct ieee80211_mgmt *mgmt, size_t len)
1847 {
1848 struct sta_info *sta;
1849
1850 if (len < IEEE80211_HDRLEN + sizeof(mgmt->u.deauth)) {
1851 wpa_msg(hapd->msg_ctx, MSG_DEBUG, "handle_deauth - too short "
1852 "payload (len=%lu)", (unsigned long) len);
1853 return;
1854 }
1855
1856 wpa_msg(hapd->msg_ctx, MSG_DEBUG, "deauthentication: STA=" MACSTR
1857 " reason_code=%d",
1858 MAC2STR(mgmt->sa), le_to_host16(mgmt->u.deauth.reason_code));
1859
1860 sta = ap_get_sta(hapd, mgmt->sa);
1861 if (sta == NULL) {
1862 wpa_msg(hapd->msg_ctx, MSG_DEBUG, "Station " MACSTR " trying "
1863 "to deauthenticate, but it is not authenticated",
1864 MAC2STR(mgmt->sa));
1865 return;
1866 }
1867
1868 ap_sta_set_authorized(hapd, sta, 0);
1869 sta->last_seq_ctrl = WLAN_INVALID_MGMT_SEQ;
1870 sta->flags &= ~(WLAN_STA_AUTH | WLAN_STA_ASSOC |
1871 WLAN_STA_ASSOC_REQ_OK);
1872 wpa_auth_sm_event(sta->wpa_sm, WPA_DEAUTH);
1873 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
1874 HOSTAPD_LEVEL_DEBUG, "deauthenticated");
1875 mlme_deauthenticate_indication(
1876 hapd, sta, le_to_host16(mgmt->u.deauth.reason_code));
1877 sta->acct_terminate_cause = RADIUS_ACCT_TERMINATE_CAUSE_USER_REQUEST;
1878 ieee802_1x_notify_port_enabled(sta->eapol_sm, 0);
1879 ap_free_sta(hapd, sta);
1880 }
1881
1882
1883 static void handle_beacon(struct hostapd_data *hapd,
1884 const struct ieee80211_mgmt *mgmt, size_t len,
1885 struct hostapd_frame_info *fi)
1886 {
1887 struct ieee802_11_elems elems;
1888
1889 if (len < IEEE80211_HDRLEN + sizeof(mgmt->u.beacon)) {
1890 wpa_printf(MSG_INFO, "handle_beacon - too short payload (len=%lu)",
1891 (unsigned long) len);
1892 return;
1893 }
1894
1895 (void) ieee802_11_parse_elems(mgmt->u.beacon.variable,
1896 len - (IEEE80211_HDRLEN +
1897 sizeof(mgmt->u.beacon)), &elems,
1898 0);
1899
1900 ap_list_process_beacon(hapd->iface, mgmt, &elems, fi);
1901 }
1902
1903
1904 #ifdef CONFIG_IEEE80211W
1905
1906 static int hostapd_sa_query_action(struct hostapd_data *hapd,
1907 const struct ieee80211_mgmt *mgmt,
1908 size_t len)
1909 {
1910 const u8 *end;
1911
1912 end = mgmt->u.action.u.sa_query_resp.trans_id +
1913 WLAN_SA_QUERY_TR_ID_LEN;
1914 if (((u8 *) mgmt) + len < end) {
1915 wpa_printf(MSG_DEBUG, "IEEE 802.11: Too short SA Query Action "
1916 "frame (len=%lu)", (unsigned long) len);
1917 return 0;
1918 }
1919
1920 ieee802_11_sa_query_action(hapd, mgmt->sa,
1921 mgmt->u.action.u.sa_query_resp.action,
1922 mgmt->u.action.u.sa_query_resp.trans_id);
1923 return 1;
1924 }
1925
1926
1927 static int robust_action_frame(u8 category)
1928 {
1929 return category != WLAN_ACTION_PUBLIC &&
1930 category != WLAN_ACTION_HT;
1931 }
1932 #endif /* CONFIG_IEEE80211W */
1933
1934
1935 static int handle_action(struct hostapd_data *hapd,
1936 const struct ieee80211_mgmt *mgmt, size_t len)
1937 {
1938 struct sta_info *sta;
1939 sta = ap_get_sta(hapd, mgmt->sa);
1940
1941 if (len < IEEE80211_HDRLEN + 1) {
1942 hostapd_logger(hapd, mgmt->sa, HOSTAPD_MODULE_IEEE80211,
1943 HOSTAPD_LEVEL_DEBUG,
1944 "handle_action - too short payload (len=%lu)",
1945 (unsigned long) len);
1946 return 0;
1947 }
1948
1949 if (mgmt->u.action.category != WLAN_ACTION_PUBLIC &&
1950 (sta == NULL || !(sta->flags & WLAN_STA_ASSOC))) {
1951 wpa_printf(MSG_DEBUG, "IEEE 802.11: Ignored Action "
1952 "frame (category=%u) from unassociated STA " MACSTR,
1953 MAC2STR(mgmt->sa), mgmt->u.action.category);
1954 return 0;
1955 }
1956
1957 #ifdef CONFIG_IEEE80211W
1958 if (sta && (sta->flags & WLAN_STA_MFP) &&
1959 !(mgmt->frame_control & host_to_le16(WLAN_FC_ISWEP)) &&
1960 robust_action_frame(mgmt->u.action.category)) {
1961 hostapd_logger(hapd, mgmt->sa, HOSTAPD_MODULE_IEEE80211,
1962 HOSTAPD_LEVEL_DEBUG,
1963 "Dropped unprotected Robust Action frame from "
1964 "an MFP STA");
1965 return 0;
1966 }
1967 #endif /* CONFIG_IEEE80211W */
1968
1969 if (sta) {
1970 u16 fc = le_to_host16(mgmt->frame_control);
1971 u16 seq_ctrl = le_to_host16(mgmt->seq_ctrl);
1972
1973 if ((fc & WLAN_FC_RETRY) &&
1974 sta->last_seq_ctrl != WLAN_INVALID_MGMT_SEQ &&
1975 sta->last_seq_ctrl == seq_ctrl &&
1976 sta->last_subtype == WLAN_FC_STYPE_ACTION) {
1977 hostapd_logger(hapd, sta->addr,
1978 HOSTAPD_MODULE_IEEE80211,
1979 HOSTAPD_LEVEL_DEBUG,
1980 "Drop repeated action frame seq_ctrl=0x%x",
1981 seq_ctrl);
1982 return 1;
1983 }
1984
1985 sta->last_seq_ctrl = seq_ctrl;
1986 sta->last_subtype = WLAN_FC_STYPE_ACTION;
1987 }
1988
1989 switch (mgmt->u.action.category) {
1990 #ifdef CONFIG_IEEE80211R
1991 case WLAN_ACTION_FT:
1992 if (!sta ||
1993 wpa_ft_action_rx(sta->wpa_sm, (u8 *) &mgmt->u.action,
1994 len - IEEE80211_HDRLEN))
1995 break;
1996 return 1;
1997 #endif /* CONFIG_IEEE80211R */
1998 case WLAN_ACTION_WMM:
1999 hostapd_wmm_action(hapd, mgmt, len);
2000 return 1;
2001 #ifdef CONFIG_IEEE80211W
2002 case WLAN_ACTION_SA_QUERY:
2003 return hostapd_sa_query_action(hapd, mgmt, len);
2004 #endif /* CONFIG_IEEE80211W */
2005 #ifdef CONFIG_WNM
2006 case WLAN_ACTION_WNM:
2007 ieee802_11_rx_wnm_action_ap(hapd, mgmt, len);
2008 return 1;
2009 #endif /* CONFIG_WNM */
2010 case WLAN_ACTION_PUBLIC:
2011 case WLAN_ACTION_PROTECTED_DUAL:
2012 #ifdef CONFIG_IEEE80211N
2013 if (mgmt->u.action.u.public_action.action ==
2014 WLAN_PA_20_40_BSS_COEX) {
2015 wpa_printf(MSG_DEBUG,
2016 "HT20/40 coex mgmt frame received from STA "
2017 MACSTR, MAC2STR(mgmt->sa));
2018 hostapd_2040_coex_action(hapd, mgmt, len);
2019 }
2020 #endif /* CONFIG_IEEE80211N */
2021 if (hapd->public_action_cb) {
2022 hapd->public_action_cb(hapd->public_action_cb_ctx,
2023 (u8 *) mgmt, len,
2024 hapd->iface->freq);
2025 }
2026 if (hapd->public_action_cb2) {
2027 hapd->public_action_cb2(hapd->public_action_cb2_ctx,
2028 (u8 *) mgmt, len,
2029 hapd->iface->freq);
2030 }
2031 if (hapd->public_action_cb || hapd->public_action_cb2)
2032 return 1;
2033 break;
2034 case WLAN_ACTION_VENDOR_SPECIFIC:
2035 if (hapd->vendor_action_cb) {
2036 if (hapd->vendor_action_cb(hapd->vendor_action_cb_ctx,
2037 (u8 *) mgmt, len,
2038 hapd->iface->freq) == 0)
2039 return 1;
2040 }
2041 break;
2042 }
2043
2044 hostapd_logger(hapd, mgmt->sa, HOSTAPD_MODULE_IEEE80211,
2045 HOSTAPD_LEVEL_DEBUG,
2046 "handle_action - unknown action category %d or invalid "
2047 "frame",
2048 mgmt->u.action.category);
2049 if (!(mgmt->da[0] & 0x01) && !(mgmt->u.action.category & 0x80) &&
2050 !(mgmt->sa[0] & 0x01)) {
2051 struct ieee80211_mgmt *resp;
2052
2053 /*
2054 * IEEE 802.11-REVma/D9.0 - 7.3.1.11
2055 * Return the Action frame to the source without change
2056 * except that MSB of the Category set to 1.
2057 */
2058 wpa_printf(MSG_DEBUG, "IEEE 802.11: Return unknown Action "
2059 "frame back to sender");
2060 resp = os_malloc(len);
2061 if (resp == NULL)
2062 return 0;
2063 os_memcpy(resp, mgmt, len);
2064 os_memcpy(resp->da, resp->sa, ETH_ALEN);
2065 os_memcpy(resp->sa, hapd->own_addr, ETH_ALEN);
2066 os_memcpy(resp->bssid, hapd->own_addr, ETH_ALEN);
2067 resp->u.action.category |= 0x80;
2068
2069 if (hostapd_drv_send_mlme(hapd, resp, len, 0) < 0) {
2070 wpa_printf(MSG_ERROR, "IEEE 802.11: Failed to send "
2071 "Action frame");
2072 }
2073 os_free(resp);
2074 }
2075
2076 return 1;
2077 }
2078
2079
2080 /**
2081 * ieee802_11_mgmt - process incoming IEEE 802.11 management frames
2082 * @hapd: hostapd BSS data structure (the BSS to which the management frame was
2083 * sent to)
2084 * @buf: management frame data (starting from IEEE 802.11 header)
2085 * @len: length of frame data in octets
2086 * @fi: meta data about received frame (signal level, etc.)
2087 *
2088 * Process all incoming IEEE 802.11 management frames. This will be called for
2089 * each frame received from the kernel driver through wlan#ap interface. In
2090 * addition, it can be called to re-inserted pending frames (e.g., when using
2091 * external RADIUS server as an MAC ACL).
2092 */
2093 int ieee802_11_mgmt(struct hostapd_data *hapd, const u8 *buf, size_t len,
2094 struct hostapd_frame_info *fi)
2095 {
2096 struct ieee80211_mgmt *mgmt;
2097 int broadcast;
2098 u16 fc, stype;
2099 int ret = 0;
2100
2101 if (len < 24)
2102 return 0;
2103
2104 mgmt = (struct ieee80211_mgmt *) buf;
2105 fc = le_to_host16(mgmt->frame_control);
2106 stype = WLAN_FC_GET_STYPE(fc);
2107
2108 if (stype == WLAN_FC_STYPE_BEACON) {
2109 handle_beacon(hapd, mgmt, len, fi);
2110 return 1;
2111 }
2112
2113 broadcast = mgmt->bssid[0] == 0xff && mgmt->bssid[1] == 0xff &&
2114 mgmt->bssid[2] == 0xff && mgmt->bssid[3] == 0xff &&
2115 mgmt->bssid[4] == 0xff && mgmt->bssid[5] == 0xff;
2116
2117 if (!broadcast &&
2118 #ifdef CONFIG_P2P
2119 /* Invitation responses can be sent with the peer MAC as BSSID */
2120 !((hapd->conf->p2p & P2P_GROUP_OWNER) &&
2121 stype == WLAN_FC_STYPE_ACTION) &&
2122 #endif /* CONFIG_P2P */
2123 #ifdef CONFIG_MESH
2124 !(hapd->conf->mesh & MESH_ENABLED) &&
2125 #endif /* CONFIG_MESH */
2126 os_memcmp(mgmt->bssid, hapd->own_addr, ETH_ALEN) != 0) {
2127 wpa_printf(MSG_INFO, "MGMT: BSSID=" MACSTR " not our address",
2128 MAC2STR(mgmt->bssid));
2129 return 0;
2130 }
2131
2132
2133 if (stype == WLAN_FC_STYPE_PROBE_REQ) {
2134 handle_probe_req(hapd, mgmt, len, fi->ssi_signal);
2135 return 1;
2136 }
2137
2138 if (os_memcmp(mgmt->da, hapd->own_addr, ETH_ALEN) != 0) {
2139 hostapd_logger(hapd, mgmt->sa, HOSTAPD_MODULE_IEEE80211,
2140 HOSTAPD_LEVEL_DEBUG,
2141 "MGMT: DA=" MACSTR " not our address",
2142 MAC2STR(mgmt->da));
2143 return 0;
2144 }
2145
2146 switch (stype) {
2147 case WLAN_FC_STYPE_AUTH:
2148 wpa_printf(MSG_DEBUG, "mgmt::auth");
2149 handle_auth(hapd, mgmt, len);
2150 ret = 1;
2151 break;
2152 case WLAN_FC_STYPE_ASSOC_REQ:
2153 wpa_printf(MSG_DEBUG, "mgmt::assoc_req");
2154 handle_assoc(hapd, mgmt, len, 0);
2155 ret = 1;
2156 break;
2157 case WLAN_FC_STYPE_REASSOC_REQ:
2158 wpa_printf(MSG_DEBUG, "mgmt::reassoc_req");
2159 handle_assoc(hapd, mgmt, len, 1);
2160 ret = 1;
2161 break;
2162 case WLAN_FC_STYPE_DISASSOC:
2163 wpa_printf(MSG_DEBUG, "mgmt::disassoc");
2164 handle_disassoc(hapd, mgmt, len);
2165 ret = 1;
2166 break;
2167 case WLAN_FC_STYPE_DEAUTH:
2168 wpa_msg(hapd->msg_ctx, MSG_DEBUG, "mgmt::deauth");
2169 handle_deauth(hapd, mgmt, len);
2170 ret = 1;
2171 break;
2172 case WLAN_FC_STYPE_ACTION:
2173 wpa_printf(MSG_DEBUG, "mgmt::action");
2174 ret = handle_action(hapd, mgmt, len);
2175 break;
2176 default:
2177 hostapd_logger(hapd, mgmt->sa, HOSTAPD_MODULE_IEEE80211,
2178 HOSTAPD_LEVEL_DEBUG,
2179 "unknown mgmt frame subtype %d", stype);
2180 break;
2181 }
2182
2183 return ret;
2184 }
2185
2186
2187 static void handle_auth_cb(struct hostapd_data *hapd,
2188 const struct ieee80211_mgmt *mgmt,
2189 size_t len, int ok)
2190 {
2191 u16 auth_alg, auth_transaction, status_code;
2192 struct sta_info *sta;
2193
2194 if (!ok) {
2195 hostapd_logger(hapd, mgmt->da, HOSTAPD_MODULE_IEEE80211,
2196 HOSTAPD_LEVEL_NOTICE,
2197 "did not acknowledge authentication response");
2198 return;
2199 }
2200
2201 if (len < IEEE80211_HDRLEN + sizeof(mgmt->u.auth)) {
2202 wpa_printf(MSG_INFO, "handle_auth_cb - too short payload (len=%lu)",
2203 (unsigned long) len);
2204 return;
2205 }
2206
2207 auth_alg = le_to_host16(mgmt->u.auth.auth_alg);
2208 auth_transaction = le_to_host16(mgmt->u.auth.auth_transaction);
2209 status_code = le_to_host16(mgmt->u.auth.status_code);
2210
2211 sta = ap_get_sta(hapd, mgmt->da);
2212 if (!sta) {
2213 wpa_printf(MSG_INFO, "handle_auth_cb: STA " MACSTR " not found",
2214 MAC2STR(mgmt->da));
2215 return;
2216 }
2217
2218 if (status_code == WLAN_STATUS_SUCCESS &&
2219 ((auth_alg == WLAN_AUTH_OPEN && auth_transaction == 2) ||
2220 (auth_alg == WLAN_AUTH_SHARED_KEY && auth_transaction == 4))) {
2221 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
2222 HOSTAPD_LEVEL_INFO, "authenticated");
2223 sta->flags |= WLAN_STA_AUTH;
2224 }
2225 }
2226
2227
2228 static void hostapd_set_wds_encryption(struct hostapd_data *hapd,
2229 struct sta_info *sta,
2230 char *ifname_wds)
2231 {
2232 int i;
2233 struct hostapd_ssid *ssid = sta->ssid;
2234
2235 if (hapd->conf->ieee802_1x || hapd->conf->wpa)
2236 return;
2237
2238 for (i = 0; i < 4; i++) {
2239 if (ssid->wep.key[i] &&
2240 hostapd_drv_set_key(ifname_wds, hapd, WPA_ALG_WEP, NULL, i,
2241 i == ssid->wep.idx, NULL, 0,
2242 ssid->wep.key[i], ssid->wep.len[i])) {
2243 wpa_printf(MSG_WARNING,
2244 "Could not set WEP keys for WDS interface; %s",
2245 ifname_wds);
2246 break;
2247 }
2248 }
2249 }
2250
2251
2252 static void handle_assoc_cb(struct hostapd_data *hapd,
2253 const struct ieee80211_mgmt *mgmt,
2254 size_t len, int reassoc, int ok)
2255 {
2256 u16 status;
2257 struct sta_info *sta;
2258 int new_assoc = 1;
2259 struct ieee80211_ht_capabilities ht_cap;
2260 struct ieee80211_vht_capabilities vht_cap;
2261
2262 if (len < IEEE80211_HDRLEN + (reassoc ? sizeof(mgmt->u.reassoc_resp) :
2263 sizeof(mgmt->u.assoc_resp))) {
2264 wpa_printf(MSG_INFO, "handle_assoc_cb(reassoc=%d) - too short payload (len=%lu)",
2265 reassoc, (unsigned long) len);
2266 return;
2267 }
2268
2269 sta = ap_get_sta(hapd, mgmt->da);
2270 if (!sta) {
2271 wpa_printf(MSG_INFO, "handle_assoc_cb: STA " MACSTR " not found",
2272 MAC2STR(mgmt->da));
2273 return;
2274 }
2275
2276 if (!ok) {
2277 hostapd_logger(hapd, mgmt->da, HOSTAPD_MODULE_IEEE80211,
2278 HOSTAPD_LEVEL_DEBUG,
2279 "did not acknowledge association response");
2280 sta->flags &= ~WLAN_STA_ASSOC_REQ_OK;
2281 return;
2282 }
2283
2284 if (reassoc)
2285 status = le_to_host16(mgmt->u.reassoc_resp.status_code);
2286 else
2287 status = le_to_host16(mgmt->u.assoc_resp.status_code);
2288
2289 if (status != WLAN_STATUS_SUCCESS)
2290 return;
2291
2292 /* Stop previous accounting session, if one is started, and allocate
2293 * new session id for the new session. */
2294 accounting_sta_stop(hapd, sta);
2295
2296 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
2297 HOSTAPD_LEVEL_INFO,
2298 "associated (aid %d)",
2299 sta->aid);
2300
2301 if (sta->flags & WLAN_STA_ASSOC)
2302 new_assoc = 0;
2303 sta->flags |= WLAN_STA_ASSOC;
2304 sta->flags &= ~WLAN_STA_WNM_SLEEP_MODE;
2305 if ((!hapd->conf->ieee802_1x && !hapd->conf->wpa && !hapd->conf->osen) ||
2306 sta->auth_alg == WLAN_AUTH_FT) {
2307 /*
2308 * Open, static WEP, or FT protocol; no separate authorization
2309 * step.
2310 */
2311 ap_sta_set_authorized(hapd, sta, 1);
2312 }
2313
2314 if (reassoc)
2315 mlme_reassociate_indication(hapd, sta);
2316 else
2317 mlme_associate_indication(hapd, sta);
2318
2319 #ifdef CONFIG_IEEE80211W
2320 sta->sa_query_timed_out = 0;
2321 #endif /* CONFIG_IEEE80211W */
2322
2323 /*
2324 * Remove the STA entry in order to make sure the STA PS state gets
2325 * cleared and configuration gets updated in case of reassociation back
2326 * to the same AP.
2327 */
2328 hostapd_drv_sta_remove(hapd, sta->addr);
2329
2330 #ifdef CONFIG_IEEE80211N
2331 if (sta->flags & WLAN_STA_HT)
2332 hostapd_get_ht_capab(hapd, sta->ht_capabilities, &ht_cap);
2333 #endif /* CONFIG_IEEE80211N */
2334 #ifdef CONFIG_IEEE80211AC
2335 if (sta->flags & WLAN_STA_VHT)
2336 hostapd_get_vht_capab(hapd, sta->vht_capabilities, &vht_cap);
2337 #endif /* CONFIG_IEEE80211AC */
2338
2339 if (hostapd_sta_add(hapd, sta->addr, sta->aid, sta->capability,
2340 sta->supported_rates, sta->supported_rates_len,
2341 sta->listen_interval,
2342 sta->flags & WLAN_STA_HT ? &ht_cap : NULL,
2343 sta->flags & WLAN_STA_VHT ? &vht_cap : NULL,
2344 sta->flags, sta->qosinfo, sta->vht_opmode)) {
2345 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
2346 HOSTAPD_LEVEL_NOTICE,
2347 "Could not add STA to kernel driver");
2348
2349 ap_sta_disconnect(hapd, sta, sta->addr,
2350 WLAN_REASON_DISASSOC_AP_BUSY);
2351
2352 return;
2353 }
2354
2355 if (sta->flags & WLAN_STA_WDS) {
2356 int ret;
2357 char ifname_wds[IFNAMSIZ + 1];
2358
2359 ret = hostapd_set_wds_sta(hapd, ifname_wds, sta->addr,
2360 sta->aid, 1);
2361 if (!ret)
2362 hostapd_set_wds_encryption(hapd, sta, ifname_wds);
2363 }
2364
2365 if (sta->eapol_sm == NULL) {
2366 /*
2367 * This STA does not use RADIUS server for EAP authentication,
2368 * so bind it to the selected VLAN interface now, since the
2369 * interface selection is not going to change anymore.
2370 */
2371 if (ap_sta_bind_vlan(hapd, sta, 0) < 0)
2372 return;
2373 } else if (sta->vlan_id) {
2374 /* VLAN ID already set (e.g., by PMKSA caching), so bind STA */
2375 if (ap_sta_bind_vlan(hapd, sta, 0) < 0)
2376 return;
2377 }
2378
2379 hostapd_set_sta_flags(hapd, sta);
2380
2381 if (sta->auth_alg == WLAN_AUTH_FT)
2382 wpa_auth_sm_event(sta->wpa_sm, WPA_ASSOC_FT);
2383 else
2384 wpa_auth_sm_event(sta->wpa_sm, WPA_ASSOC);
2385 hapd->new_assoc_sta_cb(hapd, sta, !new_assoc);
2386
2387 ieee802_1x_notify_port_enabled(sta->eapol_sm, 1);
2388 }
2389
2390
2391 static void handle_deauth_cb(struct hostapd_data *hapd,
2392 const struct ieee80211_mgmt *mgmt,
2393 size_t len, int ok)
2394 {
2395 struct sta_info *sta;
2396 if (mgmt->da[0] & 0x01)
2397 return;
2398 sta = ap_get_sta(hapd, mgmt->da);
2399 if (!sta) {
2400 wpa_printf(MSG_DEBUG, "handle_deauth_cb: STA " MACSTR
2401 " not found", MAC2STR(mgmt->da));
2402 return;
2403 }
2404 if (ok)
2405 wpa_printf(MSG_DEBUG, "STA " MACSTR " acknowledged deauth",
2406 MAC2STR(sta->addr));
2407 else
2408 wpa_printf(MSG_DEBUG, "STA " MACSTR " did not acknowledge "
2409 "deauth", MAC2STR(sta->addr));
2410
2411 ap_sta_deauth_cb(hapd, sta);
2412 }
2413
2414
2415 static void handle_disassoc_cb(struct hostapd_data *hapd,
2416 const struct ieee80211_mgmt *mgmt,
2417 size_t len, int ok)
2418 {
2419 struct sta_info *sta;
2420 if (mgmt->da[0] & 0x01)
2421 return;
2422 sta = ap_get_sta(hapd, mgmt->da);
2423 if (!sta) {
2424 wpa_printf(MSG_DEBUG, "handle_disassoc_cb: STA " MACSTR
2425 " not found", MAC2STR(mgmt->da));
2426 return;
2427 }
2428 if (ok)
2429 wpa_printf(MSG_DEBUG, "STA " MACSTR " acknowledged disassoc",
2430 MAC2STR(sta->addr));
2431 else
2432 wpa_printf(MSG_DEBUG, "STA " MACSTR " did not acknowledge "
2433 "disassoc", MAC2STR(sta->addr));
2434
2435 ap_sta_disassoc_cb(hapd, sta);
2436 }
2437
2438
2439 /**
2440 * ieee802_11_mgmt_cb - Process management frame TX status callback
2441 * @hapd: hostapd BSS data structure (the BSS from which the management frame
2442 * was sent from)
2443 * @buf: management frame data (starting from IEEE 802.11 header)
2444 * @len: length of frame data in octets
2445 * @stype: management frame subtype from frame control field
2446 * @ok: Whether the frame was ACK'ed
2447 */
2448 void ieee802_11_mgmt_cb(struct hostapd_data *hapd, const u8 *buf, size_t len,
2449 u16 stype, int ok)
2450 {
2451 const struct ieee80211_mgmt *mgmt;
2452 mgmt = (const struct ieee80211_mgmt *) buf;
2453
2454 #ifdef CONFIG_TESTING_OPTIONS
2455 if (hapd->ext_mgmt_frame_handling) {
2456 wpa_msg(hapd->msg_ctx, MSG_INFO, "MGMT-TX-STATUS stype=%u ok=%d",
2457 stype, ok);
2458 return;
2459 }
2460 #endif /* CONFIG_TESTING_OPTIONS */
2461
2462 switch (stype) {
2463 case WLAN_FC_STYPE_AUTH:
2464 wpa_printf(MSG_DEBUG, "mgmt::auth cb");
2465 handle_auth_cb(hapd, mgmt, len, ok);
2466 break;
2467 case WLAN_FC_STYPE_ASSOC_RESP:
2468 wpa_printf(MSG_DEBUG, "mgmt::assoc_resp cb");
2469 handle_assoc_cb(hapd, mgmt, len, 0, ok);
2470 break;
2471 case WLAN_FC_STYPE_REASSOC_RESP:
2472 wpa_printf(MSG_DEBUG, "mgmt::reassoc_resp cb");
2473 handle_assoc_cb(hapd, mgmt, len, 1, ok);
2474 break;
2475 case WLAN_FC_STYPE_PROBE_RESP:
2476 wpa_printf(MSG_EXCESSIVE, "mgmt::proberesp cb");
2477 break;
2478 case WLAN_FC_STYPE_DEAUTH:
2479 wpa_printf(MSG_DEBUG, "mgmt::deauth cb");
2480 handle_deauth_cb(hapd, mgmt, len, ok);
2481 break;
2482 case WLAN_FC_STYPE_DISASSOC:
2483 wpa_printf(MSG_DEBUG, "mgmt::disassoc cb");
2484 handle_disassoc_cb(hapd, mgmt, len, ok);
2485 break;
2486 case WLAN_FC_STYPE_ACTION:
2487 wpa_printf(MSG_DEBUG, "mgmt::action cb");
2488 break;
2489 default:
2490 wpa_printf(MSG_INFO, "unknown mgmt cb frame subtype %d", stype);
2491 break;
2492 }
2493 }
2494
2495
2496 int ieee802_11_get_mib(struct hostapd_data *hapd, char *buf, size_t buflen)
2497 {
2498 /* TODO */
2499 return 0;
2500 }
2501
2502
2503 int ieee802_11_get_mib_sta(struct hostapd_data *hapd, struct sta_info *sta,
2504 char *buf, size_t buflen)
2505 {
2506 /* TODO */
2507 return 0;
2508 }
2509
2510
2511 void hostapd_tx_status(struct hostapd_data *hapd, const u8 *addr,
2512 const u8 *buf, size_t len, int ack)
2513 {
2514 struct sta_info *sta;
2515 struct hostapd_iface *iface = hapd->iface;
2516
2517 sta = ap_get_sta(hapd, addr);
2518 if (sta == NULL && iface->num_bss > 1) {
2519 size_t j;
2520 for (j = 0; j < iface->num_bss; j++) {
2521 hapd = iface->bss[j];
2522 sta = ap_get_sta(hapd, addr);
2523 if (sta)
2524 break;
2525 }
2526 }
2527 if (sta == NULL || !(sta->flags & WLAN_STA_ASSOC))
2528 return;
2529 if (sta->flags & WLAN_STA_PENDING_POLL) {
2530 wpa_printf(MSG_DEBUG, "STA " MACSTR " %s pending "
2531 "activity poll", MAC2STR(sta->addr),
2532 ack ? "ACKed" : "did not ACK");
2533 if (ack)
2534 sta->flags &= ~WLAN_STA_PENDING_POLL;
2535 }
2536
2537 ieee802_1x_tx_status(hapd, sta, buf, len, ack);
2538 }
2539
2540
2541 void hostapd_eapol_tx_status(struct hostapd_data *hapd, const u8 *dst,
2542 const u8 *data, size_t len, int ack)
2543 {
2544 struct sta_info *sta;
2545 struct hostapd_iface *iface = hapd->iface;
2546
2547 sta = ap_get_sta(hapd, dst);
2548 if (sta == NULL && iface->num_bss > 1) {
2549 size_t j;
2550 for (j = 0; j < iface->num_bss; j++) {
2551 hapd = iface->bss[j];
2552 sta = ap_get_sta(hapd, dst);
2553 if (sta)
2554 break;
2555 }
2556 }
2557 if (sta == NULL || !(sta->flags & WLAN_STA_ASSOC)) {
2558 wpa_printf(MSG_DEBUG, "Ignore TX status for Data frame to STA "
2559 MACSTR " that is not currently associated",
2560 MAC2STR(dst));
2561 return;
2562 }
2563
2564 ieee802_1x_eapol_tx_status(hapd, sta, data, len, ack);
2565 }
2566
2567
2568 void hostapd_client_poll_ok(struct hostapd_data *hapd, const u8 *addr)
2569 {
2570 struct sta_info *sta;
2571 struct hostapd_iface *iface = hapd->iface;
2572
2573 sta = ap_get_sta(hapd, addr);
2574 if (sta == NULL && iface->num_bss > 1) {
2575 size_t j;
2576 for (j = 0; j < iface->num_bss; j++) {
2577 hapd = iface->bss[j];
2578 sta = ap_get_sta(hapd, addr);
2579 if (sta)
2580 break;
2581 }
2582 }
2583 if (sta == NULL)
2584 return;
2585 if (!(sta->flags & WLAN_STA_PENDING_POLL))
2586 return;
2587
2588 wpa_printf(MSG_DEBUG, "STA " MACSTR " ACKed pending "
2589 "activity poll", MAC2STR(sta->addr));
2590 sta->flags &= ~WLAN_STA_PENDING_POLL;
2591 }
2592
2593
2594 void ieee802_11_rx_from_unknown(struct hostapd_data *hapd, const u8 *src,
2595 int wds)
2596 {
2597 struct sta_info *sta;
2598
2599 sta = ap_get_sta(hapd, src);
2600 if (sta && (sta->flags & WLAN_STA_ASSOC)) {
2601 if (!hapd->conf->wds_sta)
2602 return;
2603
2604 if (wds && !(sta->flags & WLAN_STA_WDS)) {
2605 int ret;
2606 char ifname_wds[IFNAMSIZ + 1];
2607
2608 wpa_printf(MSG_DEBUG, "Enable 4-address WDS mode for "
2609 "STA " MACSTR " (aid %u)",
2610 MAC2STR(sta->addr), sta->aid);
2611 sta->flags |= WLAN_STA_WDS;
2612 ret = hostapd_set_wds_sta(hapd, ifname_wds,
2613 sta->addr, sta->aid, 1);
2614 if (!ret)
2615 hostapd_set_wds_encryption(hapd, sta,
2616 ifname_wds);
2617 }
2618 return;
2619 }
2620
2621 wpa_printf(MSG_DEBUG, "Data/PS-poll frame from not associated STA "
2622 MACSTR, MAC2STR(src));
2623 if (src[0] & 0x01) {
2624 /* Broadcast bit set in SA?! Ignore the frame silently. */
2625 return;
2626 }
2627
2628 if (sta && (sta->flags & WLAN_STA_ASSOC_REQ_OK)) {
2629 wpa_printf(MSG_DEBUG, "Association Response to the STA has "
2630 "already been sent, but no TX status yet known - "
2631 "ignore Class 3 frame issue with " MACSTR,
2632 MAC2STR(src));
2633 return;
2634 }
2635
2636 if (sta && (sta->flags & WLAN_STA_AUTH))
2637 hostapd_drv_sta_disassoc(
2638 hapd, src,
2639 WLAN_REASON_CLASS3_FRAME_FROM_NONASSOC_STA);
2640 else
2641 hostapd_drv_sta_deauth(
2642 hapd, src,
2643 WLAN_REASON_CLASS3_FRAME_FROM_NONASSOC_STA);
2644 }
2645
2646
2647 #endif /* CONFIG_NATIVE_WINDOWS */
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