hostapd: Use channel switch fallback on error
[mech_eap.git] / src / ap / drv_callbacks.c
1 /*
2  * hostapd / Callback functions for driver wrappers
3  * Copyright (c) 2002-2013, 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 #include "utils/common.h"
12 #include "utils/eloop.h"
13 #include "radius/radius.h"
14 #include "drivers/driver.h"
15 #include "common/ieee802_11_defs.h"
16 #include "common/ieee802_11_common.h"
17 #include "common/wpa_ctrl.h"
18 #include "crypto/random.h"
19 #include "p2p/p2p.h"
20 #include "wps/wps.h"
21 #include "wnm_ap.h"
22 #include "hostapd.h"
23 #include "ieee802_11.h"
24 #include "sta_info.h"
25 #include "accounting.h"
26 #include "tkip_countermeasures.h"
27 #include "ieee802_1x.h"
28 #include "wpa_auth.h"
29 #include "wps_hostapd.h"
30 #include "ap_drv_ops.h"
31 #include "ap_config.h"
32 #include "hw_features.h"
33 #include "dfs.h"
34 #include "beacon.h"
35
36
37 int hostapd_notif_assoc(struct hostapd_data *hapd, const u8 *addr,
38                         const u8 *req_ies, size_t req_ies_len, int reassoc)
39 {
40         struct sta_info *sta;
41         int new_assoc, res;
42         struct ieee802_11_elems elems;
43         const u8 *ie;
44         size_t ielen;
45 #ifdef CONFIG_IEEE80211R
46         u8 buf[sizeof(struct ieee80211_mgmt) + 1024];
47         u8 *p = buf;
48 #endif /* CONFIG_IEEE80211R */
49         u16 reason = WLAN_REASON_UNSPECIFIED;
50         u16 status = WLAN_STATUS_SUCCESS;
51         const u8 *p2p_dev_addr = NULL;
52
53         if (addr == NULL) {
54                 /*
55                  * This could potentially happen with unexpected event from the
56                  * driver wrapper. This was seen at least in one case where the
57                  * driver ended up being set to station mode while hostapd was
58                  * running, so better make sure we stop processing such an
59                  * event here.
60                  */
61                 wpa_printf(MSG_DEBUG, "hostapd_notif_assoc: Skip event with "
62                            "no address");
63                 return -1;
64         }
65         random_add_randomness(addr, ETH_ALEN);
66
67         hostapd_logger(hapd, addr, HOSTAPD_MODULE_IEEE80211,
68                        HOSTAPD_LEVEL_INFO, "associated");
69
70         ieee802_11_parse_elems(req_ies, req_ies_len, &elems, 0);
71         if (elems.wps_ie) {
72                 ie = elems.wps_ie - 2;
73                 ielen = elems.wps_ie_len + 2;
74                 wpa_printf(MSG_DEBUG, "STA included WPS IE in (Re)AssocReq");
75         } else if (elems.rsn_ie) {
76                 ie = elems.rsn_ie - 2;
77                 ielen = elems.rsn_ie_len + 2;
78                 wpa_printf(MSG_DEBUG, "STA included RSN IE in (Re)AssocReq");
79         } else if (elems.wpa_ie) {
80                 ie = elems.wpa_ie - 2;
81                 ielen = elems.wpa_ie_len + 2;
82                 wpa_printf(MSG_DEBUG, "STA included WPA IE in (Re)AssocReq");
83 #ifdef CONFIG_HS20
84         } else if (elems.osen) {
85                 ie = elems.osen - 2;
86                 ielen = elems.osen_len + 2;
87                 wpa_printf(MSG_DEBUG, "STA included OSEN IE in (Re)AssocReq");
88 #endif /* CONFIG_HS20 */
89         } else {
90                 ie = NULL;
91                 ielen = 0;
92                 wpa_printf(MSG_DEBUG, "STA did not include WPS/RSN/WPA IE in "
93                            "(Re)AssocReq");
94         }
95
96         sta = ap_get_sta(hapd, addr);
97         if (sta) {
98                 ap_sta_no_session_timeout(hapd, sta);
99                 accounting_sta_stop(hapd, sta);
100
101                 /*
102                  * Make sure that the previously registered inactivity timer
103                  * will not remove the STA immediately.
104                  */
105                 sta->timeout_next = STA_NULLFUNC;
106         } else {
107                 sta = ap_sta_add(hapd, addr);
108                 if (sta == NULL) {
109                         hostapd_drv_sta_disassoc(hapd, addr,
110                                                  WLAN_REASON_DISASSOC_AP_BUSY);
111                         return -1;
112                 }
113         }
114         sta->flags &= ~(WLAN_STA_WPS | WLAN_STA_MAYBE_WPS | WLAN_STA_WPS2);
115
116 #ifdef CONFIG_P2P
117         if (elems.p2p) {
118                 wpabuf_free(sta->p2p_ie);
119                 sta->p2p_ie = ieee802_11_vendor_ie_concat(req_ies, req_ies_len,
120                                                           P2P_IE_VENDOR_TYPE);
121                 if (sta->p2p_ie)
122                         p2p_dev_addr = p2p_get_go_dev_addr(sta->p2p_ie);
123         }
124 #endif /* CONFIG_P2P */
125
126 #ifdef CONFIG_IEEE80211N
127 #ifdef NEED_AP_MLME
128         if (elems.ht_capabilities &&
129             elems.ht_capabilities_len >=
130             sizeof(struct ieee80211_ht_capabilities) &&
131             (hapd->iface->conf->ht_capab &
132              HT_CAP_INFO_SUPP_CHANNEL_WIDTH_SET)) {
133                 struct ieee80211_ht_capabilities *ht_cap =
134                         (struct ieee80211_ht_capabilities *)
135                         elems.ht_capabilities;
136
137                 if (le_to_host16(ht_cap->ht_capabilities_info) &
138                     HT_CAP_INFO_40MHZ_INTOLERANT)
139                         ht40_intolerant_add(hapd->iface, sta);
140         }
141 #endif /* NEED_AP_MLME */
142 #endif /* CONFIG_IEEE80211N */
143
144 #ifdef CONFIG_INTERWORKING
145         if (elems.ext_capab && elems.ext_capab_len > 4) {
146                 if (elems.ext_capab[4] & 0x01)
147                         sta->qos_map_enabled = 1;
148         }
149 #endif /* CONFIG_INTERWORKING */
150
151 #ifdef CONFIG_HS20
152         wpabuf_free(sta->hs20_ie);
153         if (elems.hs20 && elems.hs20_len > 4) {
154                 sta->hs20_ie = wpabuf_alloc_copy(elems.hs20 + 4,
155                                                  elems.hs20_len - 4);
156         } else
157                 sta->hs20_ie = NULL;
158 #endif /* CONFIG_HS20 */
159
160         if (hapd->conf->wpa) {
161                 if (ie == NULL || ielen == 0) {
162 #ifdef CONFIG_WPS
163                         if (hapd->conf->wps_state) {
164                                 wpa_printf(MSG_DEBUG, "STA did not include "
165                                            "WPA/RSN IE in (Re)Association "
166                                            "Request - possible WPS use");
167                                 sta->flags |= WLAN_STA_MAYBE_WPS;
168                                 goto skip_wpa_check;
169                         }
170 #endif /* CONFIG_WPS */
171
172                         wpa_printf(MSG_DEBUG, "No WPA/RSN IE from STA");
173                         return -1;
174                 }
175 #ifdef CONFIG_WPS
176                 if (hapd->conf->wps_state && ie[0] == 0xdd && ie[1] >= 4 &&
177                     os_memcmp(ie + 2, "\x00\x50\xf2\x04", 4) == 0) {
178                         struct wpabuf *wps;
179                         sta->flags |= WLAN_STA_WPS;
180                         wps = ieee802_11_vendor_ie_concat(ie, ielen,
181                                                           WPS_IE_VENDOR_TYPE);
182                         if (wps) {
183                                 if (wps_is_20(wps)) {
184                                         wpa_printf(MSG_DEBUG, "WPS: STA "
185                                                    "supports WPS 2.0");
186                                         sta->flags |= WLAN_STA_WPS2;
187                                 }
188                                 wpabuf_free(wps);
189                         }
190                         goto skip_wpa_check;
191                 }
192 #endif /* CONFIG_WPS */
193
194                 if (sta->wpa_sm == NULL)
195                         sta->wpa_sm = wpa_auth_sta_init(hapd->wpa_auth,
196                                                         sta->addr,
197                                                         p2p_dev_addr);
198                 if (sta->wpa_sm == NULL) {
199                         wpa_printf(MSG_ERROR, "Failed to initialize WPA state "
200                                    "machine");
201                         return -1;
202                 }
203                 res = wpa_validate_wpa_ie(hapd->wpa_auth, sta->wpa_sm,
204                                           ie, ielen,
205                                           elems.mdie, elems.mdie_len);
206                 if (res != WPA_IE_OK) {
207                         wpa_printf(MSG_DEBUG, "WPA/RSN information element "
208                                    "rejected? (res %u)", res);
209                         wpa_hexdump(MSG_DEBUG, "IE", ie, ielen);
210                         if (res == WPA_INVALID_GROUP) {
211                                 reason = WLAN_REASON_GROUP_CIPHER_NOT_VALID;
212                                 status = WLAN_STATUS_GROUP_CIPHER_NOT_VALID;
213                         } else if (res == WPA_INVALID_PAIRWISE) {
214                                 reason = WLAN_REASON_PAIRWISE_CIPHER_NOT_VALID;
215                                 status = WLAN_STATUS_PAIRWISE_CIPHER_NOT_VALID;
216                         } else if (res == WPA_INVALID_AKMP) {
217                                 reason = WLAN_REASON_AKMP_NOT_VALID;
218                                 status = WLAN_STATUS_AKMP_NOT_VALID;
219                         }
220 #ifdef CONFIG_IEEE80211W
221                         else if (res == WPA_MGMT_FRAME_PROTECTION_VIOLATION) {
222                                 reason = WLAN_REASON_INVALID_IE;
223                                 status = WLAN_STATUS_INVALID_IE;
224                         } else if (res == WPA_INVALID_MGMT_GROUP_CIPHER) {
225                                 reason = WLAN_REASON_GROUP_CIPHER_NOT_VALID;
226                                 status = WLAN_STATUS_GROUP_CIPHER_NOT_VALID;
227                         }
228 #endif /* CONFIG_IEEE80211W */
229                         else {
230                                 reason = WLAN_REASON_INVALID_IE;
231                                 status = WLAN_STATUS_INVALID_IE;
232                         }
233                         goto fail;
234                 }
235 #ifdef CONFIG_IEEE80211W
236                 if ((sta->flags & WLAN_STA_MFP) && !sta->sa_query_timed_out &&
237                     sta->sa_query_count > 0)
238                         ap_check_sa_query_timeout(hapd, sta);
239                 if ((sta->flags & WLAN_STA_MFP) && !sta->sa_query_timed_out &&
240                     (sta->auth_alg != WLAN_AUTH_FT)) {
241                         /*
242                          * STA has already been associated with MFP and SA
243                          * Query timeout has not been reached. Reject the
244                          * association attempt temporarily and start SA Query,
245                          * if one is not pending.
246                          */
247
248                         if (sta->sa_query_count == 0)
249                                 ap_sta_start_sa_query(hapd, sta);
250
251 #ifdef CONFIG_IEEE80211R
252                         status = WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY;
253
254                         p = hostapd_eid_assoc_comeback_time(hapd, sta, p);
255
256                         hostapd_sta_assoc(hapd, addr, reassoc, status, buf,
257                                           p - buf);
258 #endif /* CONFIG_IEEE80211R */
259                         return 0;
260                 }
261
262                 if (wpa_auth_uses_mfp(sta->wpa_sm))
263                         sta->flags |= WLAN_STA_MFP;
264                 else
265                         sta->flags &= ~WLAN_STA_MFP;
266 #endif /* CONFIG_IEEE80211W */
267
268 #ifdef CONFIG_IEEE80211R
269                 if (sta->auth_alg == WLAN_AUTH_FT) {
270                         status = wpa_ft_validate_reassoc(sta->wpa_sm, req_ies,
271                                                          req_ies_len);
272                         if (status != WLAN_STATUS_SUCCESS) {
273                                 if (status == WLAN_STATUS_INVALID_PMKID)
274                                         reason = WLAN_REASON_INVALID_IE;
275                                 if (status == WLAN_STATUS_INVALID_MDIE)
276                                         reason = WLAN_REASON_INVALID_IE;
277                                 if (status == WLAN_STATUS_INVALID_FTIE)
278                                         reason = WLAN_REASON_INVALID_IE;
279                                 goto fail;
280                         }
281                 }
282 #endif /* CONFIG_IEEE80211R */
283         } else if (hapd->conf->wps_state) {
284 #ifdef CONFIG_WPS
285                 struct wpabuf *wps;
286                 if (req_ies)
287                         wps = ieee802_11_vendor_ie_concat(req_ies, req_ies_len,
288                                                           WPS_IE_VENDOR_TYPE);
289                 else
290                         wps = NULL;
291 #ifdef CONFIG_WPS_STRICT
292                 if (wps && wps_validate_assoc_req(wps) < 0) {
293                         reason = WLAN_REASON_INVALID_IE;
294                         status = WLAN_STATUS_INVALID_IE;
295                         wpabuf_free(wps);
296                         goto fail;
297                 }
298 #endif /* CONFIG_WPS_STRICT */
299                 if (wps) {
300                         sta->flags |= WLAN_STA_WPS;
301                         if (wps_is_20(wps)) {
302                                 wpa_printf(MSG_DEBUG, "WPS: STA supports "
303                                            "WPS 2.0");
304                                 sta->flags |= WLAN_STA_WPS2;
305                         }
306                 } else
307                         sta->flags |= WLAN_STA_MAYBE_WPS;
308                 wpabuf_free(wps);
309 #endif /* CONFIG_WPS */
310 #ifdef CONFIG_HS20
311         } else if (hapd->conf->osen) {
312                 if (elems.osen == NULL) {
313                         hostapd_logger(
314                                 hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
315                                 HOSTAPD_LEVEL_INFO,
316                                 "No HS 2.0 OSEN element in association request");
317                         return WLAN_STATUS_INVALID_IE;
318                 }
319
320                 wpa_printf(MSG_DEBUG, "HS 2.0: OSEN association");
321                 if (sta->wpa_sm == NULL)
322                         sta->wpa_sm = wpa_auth_sta_init(hapd->wpa_auth,
323                                                         sta->addr, NULL);
324                 if (sta->wpa_sm == NULL) {
325                         wpa_printf(MSG_WARNING, "Failed to initialize WPA "
326                                    "state machine");
327                         return WLAN_STATUS_UNSPECIFIED_FAILURE;
328                 }
329                 if (wpa_validate_osen(hapd->wpa_auth, sta->wpa_sm,
330                                       elems.osen - 2, elems.osen_len + 2) < 0)
331                         return WLAN_STATUS_INVALID_IE;
332 #endif /* CONFIG_HS20 */
333         }
334 #ifdef CONFIG_WPS
335 skip_wpa_check:
336 #endif /* CONFIG_WPS */
337
338 #ifdef CONFIG_IEEE80211R
339         p = wpa_sm_write_assoc_resp_ies(sta->wpa_sm, buf, sizeof(buf),
340                                         sta->auth_alg, req_ies, req_ies_len);
341
342         hostapd_sta_assoc(hapd, addr, reassoc, status, buf, p - buf);
343 #else /* CONFIG_IEEE80211R */
344         /* Keep compiler silent about unused variables */
345         if (status) {
346         }
347 #endif /* CONFIG_IEEE80211R */
348
349         new_assoc = (sta->flags & WLAN_STA_ASSOC) == 0;
350         sta->flags |= WLAN_STA_AUTH | WLAN_STA_ASSOC;
351         sta->flags &= ~WLAN_STA_WNM_SLEEP_MODE;
352
353         if (reassoc && (sta->auth_alg == WLAN_AUTH_FT))
354                 wpa_auth_sm_event(sta->wpa_sm, WPA_ASSOC_FT);
355         else
356                 wpa_auth_sm_event(sta->wpa_sm, WPA_ASSOC);
357
358         hostapd_new_assoc_sta(hapd, sta, !new_assoc);
359
360         ieee802_1x_notify_port_enabled(sta->eapol_sm, 1);
361
362 #ifdef CONFIG_P2P
363         if (req_ies) {
364                 p2p_group_notif_assoc(hapd->p2p_group, sta->addr,
365                                       req_ies, req_ies_len);
366         }
367 #endif /* CONFIG_P2P */
368
369         return 0;
370
371 fail:
372 #ifdef CONFIG_IEEE80211R
373         hostapd_sta_assoc(hapd, addr, reassoc, status, buf, p - buf);
374 #endif /* CONFIG_IEEE80211R */
375         hostapd_drv_sta_disassoc(hapd, sta->addr, reason);
376         ap_free_sta(hapd, sta);
377         return -1;
378 }
379
380
381 void hostapd_notif_disassoc(struct hostapd_data *hapd, const u8 *addr)
382 {
383         struct sta_info *sta;
384
385         if (addr == NULL) {
386                 /*
387                  * This could potentially happen with unexpected event from the
388                  * driver wrapper. This was seen at least in one case where the
389                  * driver ended up reporting a station mode event while hostapd
390                  * was running, so better make sure we stop processing such an
391                  * event here.
392                  */
393                 wpa_printf(MSG_DEBUG, "hostapd_notif_disassoc: Skip event "
394                            "with no address");
395                 return;
396         }
397
398         hostapd_logger(hapd, addr, HOSTAPD_MODULE_IEEE80211,
399                        HOSTAPD_LEVEL_INFO, "disassociated");
400
401         sta = ap_get_sta(hapd, addr);
402         if (sta == NULL) {
403                 wpa_printf(MSG_DEBUG, "Disassociation notification for "
404                            "unknown STA " MACSTR, MAC2STR(addr));
405                 return;
406         }
407
408         ap_sta_set_authorized(hapd, sta, 0);
409         sta->flags &= ~(WLAN_STA_AUTH | WLAN_STA_ASSOC);
410         wpa_auth_sm_event(sta->wpa_sm, WPA_DISASSOC);
411         sta->acct_terminate_cause = RADIUS_ACCT_TERMINATE_CAUSE_USER_REQUEST;
412         ieee802_1x_notify_port_enabled(sta->eapol_sm, 0);
413         ap_free_sta(hapd, sta);
414 }
415
416
417 void hostapd_event_sta_low_ack(struct hostapd_data *hapd, const u8 *addr)
418 {
419         struct sta_info *sta = ap_get_sta(hapd, addr);
420
421         if (!sta || !hapd->conf->disassoc_low_ack)
422                 return;
423
424         hostapd_logger(hapd, addr, HOSTAPD_MODULE_IEEE80211,
425                        HOSTAPD_LEVEL_INFO, "disconnected due to excessive "
426                        "missing ACKs");
427         hostapd_drv_sta_disassoc(hapd, addr, WLAN_REASON_DISASSOC_LOW_ACK);
428         if (sta)
429                 ap_sta_disassociate(hapd, sta, WLAN_REASON_DISASSOC_LOW_ACK);
430 }
431
432
433 void hostapd_event_ch_switch(struct hostapd_data *hapd, int freq, int ht,
434                              int offset, int width, int cf1, int cf2)
435 {
436 #ifdef NEED_AP_MLME
437         int channel, chwidth, seg0_idx = 0, seg1_idx = 0;
438
439         hostapd_logger(hapd, NULL, HOSTAPD_MODULE_IEEE80211,
440                        HOSTAPD_LEVEL_INFO, "driver had channel switch: "
441                        "freq=%d, ht=%d, offset=%d, width=%d, cf1=%d, cf2=%d",
442                        freq, ht, offset, width, cf1, cf2);
443
444         hapd->iface->freq = freq;
445
446         channel = hostapd_hw_get_channel(hapd, freq);
447         if (!channel) {
448                 hostapd_logger(hapd, NULL, HOSTAPD_MODULE_IEEE80211,
449                                HOSTAPD_LEVEL_WARNING, "driver switched to "
450                                "bad channel!");
451                 return;
452         }
453
454         switch (width) {
455         case CHAN_WIDTH_80:
456                 chwidth = VHT_CHANWIDTH_80MHZ;
457                 break;
458         case CHAN_WIDTH_80P80:
459                 chwidth = VHT_CHANWIDTH_80P80MHZ;
460                 break;
461         case CHAN_WIDTH_160:
462                 chwidth = VHT_CHANWIDTH_160MHZ;
463                 break;
464         case CHAN_WIDTH_20_NOHT:
465         case CHAN_WIDTH_20:
466         case CHAN_WIDTH_40:
467         default:
468                 chwidth = VHT_CHANWIDTH_USE_HT;
469                 break;
470         }
471
472         switch (hapd->iface->current_mode->mode) {
473         case HOSTAPD_MODE_IEEE80211A:
474                 if (cf1 > 5000)
475                         seg0_idx = (cf1 - 5000) / 5;
476                 if (cf2 > 5000)
477                         seg1_idx = (cf2 - 5000) / 5;
478                 break;
479         default:
480                 seg0_idx = hostapd_hw_get_channel(hapd, cf1);
481                 seg1_idx = hostapd_hw_get_channel(hapd, cf2);
482                 break;
483         }
484
485         hapd->iconf->channel = channel;
486         hapd->iconf->ieee80211n = ht;
487         hapd->iconf->secondary_channel = offset;
488         hapd->iconf->vht_oper_chwidth = chwidth;
489         hapd->iconf->vht_oper_centr_freq_seg0_idx = seg0_idx;
490         hapd->iconf->vht_oper_centr_freq_seg1_idx = seg1_idx;
491
492         if (hapd->csa_in_progress &&
493             freq == hapd->cs_freq_params.freq) {
494                 hostapd_cleanup_cs_params(hapd);
495                 ieee802_11_set_beacon(hapd);
496
497                 wpa_msg(hapd->msg_ctx, MSG_INFO, AP_CSA_FINISHED "freq=%d",
498                         freq);
499         }
500 #endif /* NEED_AP_MLME */
501 }
502
503
504 void hostapd_event_connect_failed_reason(struct hostapd_data *hapd,
505                                          const u8 *addr, int reason_code)
506 {
507         switch (reason_code) {
508         case MAX_CLIENT_REACHED:
509                 wpa_msg(hapd->msg_ctx, MSG_INFO, AP_REJECTED_MAX_STA MACSTR,
510                         MAC2STR(addr));
511                 break;
512         case BLOCKED_CLIENT:
513                 wpa_msg(hapd->msg_ctx, MSG_INFO, AP_REJECTED_BLOCKED_STA MACSTR,
514                         MAC2STR(addr));
515                 break;
516         }
517 }
518
519
520 int hostapd_probe_req_rx(struct hostapd_data *hapd, const u8 *sa, const u8 *da,
521                          const u8 *bssid, const u8 *ie, size_t ie_len,
522                          int ssi_signal)
523 {
524         size_t i;
525         int ret = 0;
526
527         if (sa == NULL || ie == NULL)
528                 return -1;
529
530         random_add_randomness(sa, ETH_ALEN);
531         for (i = 0; hapd->probereq_cb && i < hapd->num_probereq_cb; i++) {
532                 if (hapd->probereq_cb[i].cb(hapd->probereq_cb[i].ctx,
533                                             sa, da, bssid, ie, ie_len,
534                                             ssi_signal) > 0) {
535                         ret = 1;
536                         break;
537                 }
538         }
539         return ret;
540 }
541
542
543 #ifdef HOSTAPD
544
545 #ifdef CONFIG_IEEE80211R
546 static void hostapd_notify_auth_ft_finish(void *ctx, const u8 *dst,
547                                           const u8 *bssid,
548                                           u16 auth_transaction, u16 status,
549                                           const u8 *ies, size_t ies_len)
550 {
551         struct hostapd_data *hapd = ctx;
552         struct sta_info *sta;
553
554         sta = ap_get_sta(hapd, dst);
555         if (sta == NULL)
556                 return;
557
558         hostapd_logger(hapd, dst, HOSTAPD_MODULE_IEEE80211,
559                        HOSTAPD_LEVEL_DEBUG, "authentication OK (FT)");
560         sta->flags |= WLAN_STA_AUTH;
561
562         hostapd_sta_auth(hapd, dst, auth_transaction, status, ies, ies_len);
563 }
564 #endif /* CONFIG_IEEE80211R */
565
566
567 static void hostapd_notif_auth(struct hostapd_data *hapd,
568                                struct auth_info *rx_auth)
569 {
570         struct sta_info *sta;
571         u16 status = WLAN_STATUS_SUCCESS;
572         u8 resp_ies[2 + WLAN_AUTH_CHALLENGE_LEN];
573         size_t resp_ies_len = 0;
574
575         sta = ap_get_sta(hapd, rx_auth->peer);
576         if (!sta) {
577                 sta = ap_sta_add(hapd, rx_auth->peer);
578                 if (sta == NULL) {
579                         status = WLAN_STATUS_AP_UNABLE_TO_HANDLE_NEW_STA;
580                         goto fail;
581                 }
582         }
583         sta->flags &= ~WLAN_STA_PREAUTH;
584         ieee802_1x_notify_pre_auth(sta->eapol_sm, 0);
585 #ifdef CONFIG_IEEE80211R
586         if (rx_auth->auth_type == WLAN_AUTH_FT && hapd->wpa_auth) {
587                 sta->auth_alg = WLAN_AUTH_FT;
588                 if (sta->wpa_sm == NULL)
589                         sta->wpa_sm = wpa_auth_sta_init(hapd->wpa_auth,
590                                                         sta->addr, NULL);
591                 if (sta->wpa_sm == NULL) {
592                         wpa_printf(MSG_DEBUG, "FT: Failed to initialize WPA "
593                                    "state machine");
594                         status = WLAN_STATUS_UNSPECIFIED_FAILURE;
595                         goto fail;
596                 }
597                 wpa_ft_process_auth(sta->wpa_sm, rx_auth->bssid,
598                                     rx_auth->auth_transaction, rx_auth->ies,
599                                     rx_auth->ies_len,
600                                     hostapd_notify_auth_ft_finish, hapd);
601                 return;
602         }
603 #endif /* CONFIG_IEEE80211R */
604 fail:
605         hostapd_sta_auth(hapd, rx_auth->peer, rx_auth->auth_transaction + 1,
606                          status, resp_ies, resp_ies_len);
607 }
608
609
610 static void hostapd_action_rx(struct hostapd_data *hapd,
611                               struct rx_mgmt *drv_mgmt)
612 {
613         struct ieee80211_mgmt *mgmt;
614         struct sta_info *sta;
615         size_t plen __maybe_unused;
616         u16 fc;
617
618         if (drv_mgmt->frame_len < 24 + 1)
619                 return;
620
621         plen = drv_mgmt->frame_len - 24 - 1;
622
623         mgmt = (struct ieee80211_mgmt *) drv_mgmt->frame;
624         fc = le_to_host16(mgmt->frame_control);
625         if (WLAN_FC_GET_STYPE(fc) != WLAN_FC_STYPE_ACTION)
626                 return; /* handled by the driver */
627
628         wpa_printf(MSG_DEBUG, "RX_ACTION cat %d action plen %d",
629                    mgmt->u.action.category, (int) plen);
630
631         sta = ap_get_sta(hapd, mgmt->sa);
632         if (sta == NULL) {
633                 wpa_printf(MSG_DEBUG, "%s: station not found", __func__);
634                 return;
635         }
636 #ifdef CONFIG_IEEE80211R
637         if (mgmt->u.action.category == WLAN_ACTION_FT) {
638                 const u8 *payload = drv_mgmt->frame + 24 + 1;
639                 wpa_ft_action_rx(sta->wpa_sm, payload, plen);
640         }
641 #endif /* CONFIG_IEEE80211R */
642 #ifdef CONFIG_IEEE80211W
643         if (mgmt->u.action.category == WLAN_ACTION_SA_QUERY && plen >= 4) {
644                 ieee802_11_sa_query_action(
645                         hapd, mgmt->sa,
646                         mgmt->u.action.u.sa_query_resp.action,
647                         mgmt->u.action.u.sa_query_resp.trans_id);
648         }
649 #endif /* CONFIG_IEEE80211W */
650 #ifdef CONFIG_WNM
651         if (mgmt->u.action.category == WLAN_ACTION_WNM) {
652                 ieee802_11_rx_wnm_action_ap(hapd, mgmt, drv_mgmt->frame_len);
653         }
654 #endif /* CONFIG_WNM */
655 }
656
657
658 #ifdef NEED_AP_MLME
659
660 #define HAPD_BROADCAST ((struct hostapd_data *) -1)
661
662 static struct hostapd_data * get_hapd_bssid(struct hostapd_iface *iface,
663                                             const u8 *bssid)
664 {
665         size_t i;
666
667         if (bssid == NULL)
668                 return NULL;
669         if (bssid[0] == 0xff && bssid[1] == 0xff && bssid[2] == 0xff &&
670             bssid[3] == 0xff && bssid[4] == 0xff && bssid[5] == 0xff)
671                 return HAPD_BROADCAST;
672
673         for (i = 0; i < iface->num_bss; i++) {
674                 if (os_memcmp(bssid, iface->bss[i]->own_addr, ETH_ALEN) == 0)
675                         return iface->bss[i];
676         }
677
678         return NULL;
679 }
680
681
682 static void hostapd_rx_from_unknown_sta(struct hostapd_data *hapd,
683                                         const u8 *bssid, const u8 *addr,
684                                         int wds)
685 {
686         hapd = get_hapd_bssid(hapd->iface, bssid);
687         if (hapd == NULL || hapd == HAPD_BROADCAST)
688                 return;
689
690         ieee802_11_rx_from_unknown(hapd, addr, wds);
691 }
692
693
694 static int hostapd_mgmt_rx(struct hostapd_data *hapd, struct rx_mgmt *rx_mgmt)
695 {
696         struct hostapd_iface *iface = hapd->iface;
697         const struct ieee80211_hdr *hdr;
698         const u8 *bssid;
699         struct hostapd_frame_info fi;
700         int ret;
701
702 #ifdef CONFIG_TESTING_OPTIONS
703         if (hapd->ext_mgmt_frame_handling) {
704                 size_t hex_len = 2 * rx_mgmt->frame_len + 1;
705                 char *hex = os_malloc(hex_len);
706                 if (hex) {
707                         wpa_snprintf_hex(hex, hex_len, rx_mgmt->frame,
708                                          rx_mgmt->frame_len);
709                         wpa_msg(hapd->msg_ctx, MSG_INFO, "MGMT-RX %s", hex);
710                         os_free(hex);
711                 }
712                 return 1;
713         }
714 #endif /* CONFIG_TESTING_OPTIONS */
715
716         hdr = (const struct ieee80211_hdr *) rx_mgmt->frame;
717         bssid = get_hdr_bssid(hdr, rx_mgmt->frame_len);
718         if (bssid == NULL)
719                 return 0;
720
721         hapd = get_hapd_bssid(iface, bssid);
722         if (hapd == NULL) {
723                 u16 fc;
724                 fc = le_to_host16(hdr->frame_control);
725
726                 /*
727                  * Drop frames to unknown BSSIDs except for Beacon frames which
728                  * could be used to update neighbor information.
729                  */
730                 if (WLAN_FC_GET_TYPE(fc) == WLAN_FC_TYPE_MGMT &&
731                     WLAN_FC_GET_STYPE(fc) == WLAN_FC_STYPE_BEACON)
732                         hapd = iface->bss[0];
733                 else
734                         return 0;
735         }
736
737         os_memset(&fi, 0, sizeof(fi));
738         fi.datarate = rx_mgmt->datarate;
739         fi.ssi_signal = rx_mgmt->ssi_signal;
740
741         if (hapd == HAPD_BROADCAST) {
742                 size_t i;
743                 ret = 0;
744                 for (i = 0; i < iface->num_bss; i++) {
745                         /* if bss is set, driver will call this function for
746                          * each bss individually. */
747                         if (rx_mgmt->drv_priv &&
748                             (iface->bss[i]->drv_priv != rx_mgmt->drv_priv))
749                                 continue;
750
751                         if (ieee802_11_mgmt(iface->bss[i], rx_mgmt->frame,
752                                             rx_mgmt->frame_len, &fi) > 0)
753                                 ret = 1;
754                 }
755         } else
756                 ret = ieee802_11_mgmt(hapd, rx_mgmt->frame, rx_mgmt->frame_len,
757                                       &fi);
758
759         random_add_randomness(&fi, sizeof(fi));
760
761         return ret;
762 }
763
764
765 static void hostapd_mgmt_tx_cb(struct hostapd_data *hapd, const u8 *buf,
766                                size_t len, u16 stype, int ok)
767 {
768         struct ieee80211_hdr *hdr;
769         hdr = (struct ieee80211_hdr *) buf;
770         hapd = get_hapd_bssid(hapd->iface, get_hdr_bssid(hdr, len));
771         if (hapd == NULL || hapd == HAPD_BROADCAST)
772                 return;
773         ieee802_11_mgmt_cb(hapd, buf, len, stype, ok);
774 }
775
776 #endif /* NEED_AP_MLME */
777
778
779 static int hostapd_event_new_sta(struct hostapd_data *hapd, const u8 *addr)
780 {
781         struct sta_info *sta = ap_get_sta(hapd, addr);
782         if (sta)
783                 return 0;
784
785         wpa_printf(MSG_DEBUG, "Data frame from unknown STA " MACSTR
786                    " - adding a new STA", MAC2STR(addr));
787         sta = ap_sta_add(hapd, addr);
788         if (sta) {
789                 hostapd_new_assoc_sta(hapd, sta, 0);
790         } else {
791                 wpa_printf(MSG_DEBUG, "Failed to add STA entry for " MACSTR,
792                            MAC2STR(addr));
793                 return -1;
794         }
795
796         return 0;
797 }
798
799
800 static void hostapd_event_eapol_rx(struct hostapd_data *hapd, const u8 *src,
801                                    const u8 *data, size_t data_len)
802 {
803         struct hostapd_iface *iface = hapd->iface;
804         struct sta_info *sta;
805         size_t j;
806
807         for (j = 0; j < iface->num_bss; j++) {
808                 if ((sta = ap_get_sta(iface->bss[j], src))) {
809                         if (sta->flags & WLAN_STA_ASSOC) {
810                                 hapd = iface->bss[j];
811                                 break;
812                         }
813                 }
814         }
815
816         ieee802_1x_receive(hapd, src, data, data_len);
817 }
818
819
820 static struct hostapd_channel_data * hostapd_get_mode_channel(
821         struct hostapd_iface *iface, unsigned int freq)
822 {
823         int i;
824         struct hostapd_channel_data *chan;
825
826         for (i = 0; i < iface->current_mode->num_channels; i++) {
827                 chan = &iface->current_mode->channels[i];
828                 if (!chan)
829                         return NULL;
830                 if ((unsigned int) chan->freq == freq)
831                         return chan;
832         }
833
834         return NULL;
835 }
836
837
838 static void hostapd_update_nf(struct hostapd_iface *iface,
839                               struct hostapd_channel_data *chan,
840                               struct freq_survey *survey)
841 {
842         if (!iface->chans_surveyed) {
843                 chan->min_nf = survey->nf;
844                 iface->lowest_nf = survey->nf;
845         } else {
846                 if (dl_list_empty(&chan->survey_list))
847                         chan->min_nf = survey->nf;
848                 else if (survey->nf < chan->min_nf)
849                         chan->min_nf = survey->nf;
850                 if (survey->nf < iface->lowest_nf)
851                         iface->lowest_nf = survey->nf;
852         }
853 }
854
855
856 static void hostapd_event_get_survey(struct hostapd_data *hapd,
857                                      struct survey_results *survey_results)
858 {
859         struct hostapd_iface *iface = hapd->iface;
860         struct freq_survey *survey, *tmp;
861         struct hostapd_channel_data *chan;
862
863         if (dl_list_empty(&survey_results->survey_list)) {
864                 wpa_printf(MSG_DEBUG, "No survey data received");
865                 return;
866         }
867
868         dl_list_for_each_safe(survey, tmp, &survey_results->survey_list,
869                               struct freq_survey, list) {
870                 chan = hostapd_get_mode_channel(iface, survey->freq);
871                 if (!chan)
872                         continue;
873                 if (chan->flag & HOSTAPD_CHAN_DISABLED)
874                         continue;
875
876                 dl_list_del(&survey->list);
877                 dl_list_add_tail(&chan->survey_list, &survey->list);
878
879                 hostapd_update_nf(iface, chan, survey);
880
881                 iface->chans_surveyed++;
882         }
883 }
884
885
886 #ifdef NEED_AP_MLME
887
888 static void hostapd_event_iface_unavailable(struct hostapd_data *hapd)
889 {
890         wpa_printf(MSG_DEBUG, "Interface %s is unavailable -- stopped",
891                    hapd->conf->iface);
892
893         if (hapd->csa_in_progress) {
894                 wpa_printf(MSG_INFO, "CSA failed (%s was stopped)",
895                            hapd->conf->iface);
896                 hostapd_switch_channel_fallback(hapd->iface,
897                                                 &hapd->cs_freq_params);
898         }
899 }
900
901
902 static void hostapd_event_dfs_radar_detected(struct hostapd_data *hapd,
903                                              struct dfs_event *radar)
904 {
905         wpa_printf(MSG_DEBUG, "DFS radar detected on %d MHz", radar->freq);
906         hostapd_dfs_radar_detected(hapd->iface, radar->freq, radar->ht_enabled,
907                                    radar->chan_offset, radar->chan_width,
908                                    radar->cf1, radar->cf2);
909 }
910
911
912 static void hostapd_event_dfs_cac_finished(struct hostapd_data *hapd,
913                                            struct dfs_event *radar)
914 {
915         wpa_printf(MSG_DEBUG, "DFS CAC finished on %d MHz", radar->freq);
916         hostapd_dfs_complete_cac(hapd->iface, 1, radar->freq, radar->ht_enabled,
917                                  radar->chan_offset, radar->chan_width,
918                                  radar->cf1, radar->cf2);
919 }
920
921
922 static void hostapd_event_dfs_cac_aborted(struct hostapd_data *hapd,
923                                           struct dfs_event *radar)
924 {
925         wpa_printf(MSG_DEBUG, "DFS CAC aborted on %d MHz", radar->freq);
926         hostapd_dfs_complete_cac(hapd->iface, 0, radar->freq, radar->ht_enabled,
927                                  radar->chan_offset, radar->chan_width,
928                                  radar->cf1, radar->cf2);
929 }
930
931
932 static void hostapd_event_dfs_nop_finished(struct hostapd_data *hapd,
933                                            struct dfs_event *radar)
934 {
935         wpa_printf(MSG_DEBUG, "DFS NOP finished on %d MHz", radar->freq);
936         hostapd_dfs_nop_finished(hapd->iface, radar->freq, radar->ht_enabled,
937                                  radar->chan_offset, radar->chan_width,
938                                  radar->cf1, radar->cf2);
939 }
940
941 #endif /* NEED_AP_MLME */
942
943
944 void wpa_supplicant_event(void *ctx, enum wpa_event_type event,
945                           union wpa_event_data *data)
946 {
947         struct hostapd_data *hapd = ctx;
948 #ifndef CONFIG_NO_STDOUT_DEBUG
949         int level = MSG_DEBUG;
950
951         if (event == EVENT_RX_MGMT && data->rx_mgmt.frame &&
952             data->rx_mgmt.frame_len >= 24) {
953                 const struct ieee80211_hdr *hdr;
954                 u16 fc;
955                 hdr = (const struct ieee80211_hdr *) data->rx_mgmt.frame;
956                 fc = le_to_host16(hdr->frame_control);
957                 if (WLAN_FC_GET_TYPE(fc) == WLAN_FC_TYPE_MGMT &&
958                     WLAN_FC_GET_STYPE(fc) == WLAN_FC_STYPE_BEACON)
959                         level = MSG_EXCESSIVE;
960                 if (WLAN_FC_GET_TYPE(fc) == WLAN_FC_TYPE_MGMT &&
961                     WLAN_FC_GET_STYPE(fc) == WLAN_FC_STYPE_PROBE_REQ)
962                         level = MSG_EXCESSIVE;
963         }
964
965         wpa_dbg(hapd->msg_ctx, level, "Event %s (%d) received",
966                 event_to_string(event), event);
967 #endif /* CONFIG_NO_STDOUT_DEBUG */
968
969         switch (event) {
970         case EVENT_MICHAEL_MIC_FAILURE:
971                 michael_mic_failure(hapd, data->michael_mic_failure.src, 1);
972                 break;
973         case EVENT_SCAN_RESULTS:
974                 if (hapd->iface->scan_cb)
975                         hapd->iface->scan_cb(hapd->iface);
976                 break;
977 #ifdef CONFIG_IEEE80211R
978         case EVENT_FT_RRB_RX:
979                 wpa_ft_rrb_rx(hapd->wpa_auth, data->ft_rrb_rx.src,
980                               data->ft_rrb_rx.data, data->ft_rrb_rx.data_len);
981                 break;
982 #endif /* CONFIG_IEEE80211R */
983         case EVENT_WPS_BUTTON_PUSHED:
984                 hostapd_wps_button_pushed(hapd, NULL);
985                 break;
986 #ifdef NEED_AP_MLME
987         case EVENT_TX_STATUS:
988                 switch (data->tx_status.type) {
989                 case WLAN_FC_TYPE_MGMT:
990                         hostapd_mgmt_tx_cb(hapd, data->tx_status.data,
991                                            data->tx_status.data_len,
992                                            data->tx_status.stype,
993                                            data->tx_status.ack);
994                         break;
995                 case WLAN_FC_TYPE_DATA:
996                         hostapd_tx_status(hapd, data->tx_status.dst,
997                                           data->tx_status.data,
998                                           data->tx_status.data_len,
999                                           data->tx_status.ack);
1000                         break;
1001                 }
1002                 break;
1003         case EVENT_EAPOL_TX_STATUS:
1004                 hostapd_eapol_tx_status(hapd, data->eapol_tx_status.dst,
1005                                         data->eapol_tx_status.data,
1006                                         data->eapol_tx_status.data_len,
1007                                         data->eapol_tx_status.ack);
1008                 break;
1009         case EVENT_DRIVER_CLIENT_POLL_OK:
1010                 hostapd_client_poll_ok(hapd, data->client_poll.addr);
1011                 break;
1012         case EVENT_RX_FROM_UNKNOWN:
1013                 hostapd_rx_from_unknown_sta(hapd, data->rx_from_unknown.bssid,
1014                                             data->rx_from_unknown.addr,
1015                                             data->rx_from_unknown.wds);
1016                 break;
1017 #endif /* NEED_AP_MLME */
1018         case EVENT_RX_MGMT:
1019                 if (!data->rx_mgmt.frame)
1020                         break;
1021 #ifdef NEED_AP_MLME
1022                 if (hostapd_mgmt_rx(hapd, &data->rx_mgmt) > 0)
1023                         break;
1024 #endif /* NEED_AP_MLME */
1025                 hostapd_action_rx(hapd, &data->rx_mgmt);
1026                 break;
1027         case EVENT_RX_PROBE_REQ:
1028                 if (data->rx_probe_req.sa == NULL ||
1029                     data->rx_probe_req.ie == NULL)
1030                         break;
1031                 hostapd_probe_req_rx(hapd, data->rx_probe_req.sa,
1032                                      data->rx_probe_req.da,
1033                                      data->rx_probe_req.bssid,
1034                                      data->rx_probe_req.ie,
1035                                      data->rx_probe_req.ie_len,
1036                                      data->rx_probe_req.ssi_signal);
1037                 break;
1038         case EVENT_NEW_STA:
1039                 hostapd_event_new_sta(hapd, data->new_sta.addr);
1040                 break;
1041         case EVENT_EAPOL_RX:
1042                 hostapd_event_eapol_rx(hapd, data->eapol_rx.src,
1043                                        data->eapol_rx.data,
1044                                        data->eapol_rx.data_len);
1045                 break;
1046         case EVENT_ASSOC:
1047                 hostapd_notif_assoc(hapd, data->assoc_info.addr,
1048                                     data->assoc_info.req_ies,
1049                                     data->assoc_info.req_ies_len,
1050                                     data->assoc_info.reassoc);
1051                 break;
1052         case EVENT_DISASSOC:
1053                 if (data)
1054                         hostapd_notif_disassoc(hapd, data->disassoc_info.addr);
1055                 break;
1056         case EVENT_DEAUTH:
1057                 if (data)
1058                         hostapd_notif_disassoc(hapd, data->deauth_info.addr);
1059                 break;
1060         case EVENT_STATION_LOW_ACK:
1061                 if (!data)
1062                         break;
1063                 hostapd_event_sta_low_ack(hapd, data->low_ack.addr);
1064                 break;
1065         case EVENT_AUTH:
1066                 hostapd_notif_auth(hapd, &data->auth);
1067                 break;
1068         case EVENT_CH_SWITCH:
1069                 if (!data)
1070                         break;
1071                 hostapd_event_ch_switch(hapd, data->ch_switch.freq,
1072                                         data->ch_switch.ht_enabled,
1073                                         data->ch_switch.ch_offset,
1074                                         data->ch_switch.ch_width,
1075                                         data->ch_switch.cf1,
1076                                         data->ch_switch.cf2);
1077                 break;
1078         case EVENT_CONNECT_FAILED_REASON:
1079                 if (!data)
1080                         break;
1081                 hostapd_event_connect_failed_reason(
1082                         hapd, data->connect_failed_reason.addr,
1083                         data->connect_failed_reason.code);
1084                 break;
1085         case EVENT_SURVEY:
1086                 hostapd_event_get_survey(hapd, &data->survey_results);
1087                 break;
1088 #ifdef NEED_AP_MLME
1089         case EVENT_INTERFACE_UNAVAILABLE:
1090                 hostapd_event_iface_unavailable(hapd);
1091                 break;
1092         case EVENT_DFS_RADAR_DETECTED:
1093                 if (!data)
1094                         break;
1095                 hostapd_event_dfs_radar_detected(hapd, &data->dfs_event);
1096                 break;
1097         case EVENT_DFS_CAC_FINISHED:
1098                 if (!data)
1099                         break;
1100                 hostapd_event_dfs_cac_finished(hapd, &data->dfs_event);
1101                 break;
1102         case EVENT_DFS_CAC_ABORTED:
1103                 if (!data)
1104                         break;
1105                 hostapd_event_dfs_cac_aborted(hapd, &data->dfs_event);
1106                 break;
1107         case EVENT_DFS_NOP_FINISHED:
1108                 if (!data)
1109                         break;
1110                 hostapd_event_dfs_nop_finished(hapd, &data->dfs_event);
1111                 break;
1112         case EVENT_CHANNEL_LIST_CHANGED:
1113                 /* channel list changed (regulatory?), update channel list */
1114                 /* TODO: check this. hostapd_get_hw_features() initializes
1115                  * too much stuff. */
1116                 /* hostapd_get_hw_features(hapd->iface); */
1117                 hostapd_channel_list_updated(
1118                         hapd->iface, data->channel_list_changed.initiator);
1119                 break;
1120 #endif /* NEED_AP_MLME */
1121         default:
1122                 wpa_printf(MSG_DEBUG, "Unknown event %d", event);
1123                 break;
1124         }
1125 }
1126
1127 #endif /* HOSTAPD */