1
2
3
4
5
6
7
8#include <linux/kernel.h>
9#include <linux/module.h>
10#include <linux/etherdevice.h>
11#include <linux/netdevice.h>
12#include <linux/nl80211.h>
13#include <linux/slab.h>
14#include <linux/wireless.h>
15#include <net/cfg80211.h>
16#include <net/iw_handler.h>
17#include "core.h"
18#include "nl80211.h"
19#include "rdev-ops.h"
20
21
22void cfg80211_rx_assoc_resp(struct net_device *dev, struct cfg80211_bss *bss,
23 const u8 *buf, size_t len, int uapsd_queues)
24{
25 struct wireless_dev *wdev = dev->ieee80211_ptr;
26 struct wiphy *wiphy = wdev->wiphy;
27 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
28 struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)buf;
29 u8 *ie = mgmt->u.assoc_resp.variable;
30 int ieoffs = offsetof(struct ieee80211_mgmt, u.assoc_resp.variable);
31 u16 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
32
33 trace_cfg80211_send_rx_assoc(dev, bss);
34
35
36
37
38
39
40
41 if (cfg80211_sme_rx_assoc_resp(wdev, status_code)) {
42 cfg80211_unhold_bss(bss_from_pub(bss));
43 cfg80211_put_bss(wiphy, bss);
44 return;
45 }
46
47 nl80211_send_rx_assoc(rdev, dev, buf, len, GFP_KERNEL, uapsd_queues);
48
49 __cfg80211_connect_result(dev, mgmt->bssid, NULL, 0, ie, len - ieoffs,
50 status_code,
51 status_code == WLAN_STATUS_SUCCESS, bss);
52}
53EXPORT_SYMBOL(cfg80211_rx_assoc_resp);
54
55static void cfg80211_process_auth(struct wireless_dev *wdev,
56 const u8 *buf, size_t len)
57{
58 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
59
60 nl80211_send_rx_auth(rdev, wdev->netdev, buf, len, GFP_KERNEL);
61 cfg80211_sme_rx_auth(wdev, buf, len);
62}
63
64static void cfg80211_process_deauth(struct wireless_dev *wdev,
65 const u8 *buf, size_t len)
66{
67 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
68 struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)buf;
69 const u8 *bssid = mgmt->bssid;
70 u16 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
71 bool from_ap = !ether_addr_equal(mgmt->sa, wdev->netdev->dev_addr);
72
73 nl80211_send_deauth(rdev, wdev->netdev, buf, len, GFP_KERNEL);
74
75 if (!wdev->current_bss ||
76 !ether_addr_equal(wdev->current_bss->pub.bssid, bssid))
77 return;
78
79 __cfg80211_disconnected(wdev->netdev, NULL, 0, reason_code, from_ap);
80 cfg80211_sme_deauth(wdev);
81}
82
83static void cfg80211_process_disassoc(struct wireless_dev *wdev,
84 const u8 *buf, size_t len)
85{
86 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
87 struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)buf;
88 const u8 *bssid = mgmt->bssid;
89 u16 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
90 bool from_ap = !ether_addr_equal(mgmt->sa, wdev->netdev->dev_addr);
91
92 nl80211_send_disassoc(rdev, wdev->netdev, buf, len, GFP_KERNEL);
93
94 if (WARN_ON(!wdev->current_bss ||
95 !ether_addr_equal(wdev->current_bss->pub.bssid, bssid)))
96 return;
97
98 __cfg80211_disconnected(wdev->netdev, NULL, 0, reason_code, from_ap);
99 cfg80211_sme_disassoc(wdev);
100}
101
102void cfg80211_rx_mlme_mgmt(struct net_device *dev, const u8 *buf, size_t len)
103{
104 struct wireless_dev *wdev = dev->ieee80211_ptr;
105 struct ieee80211_mgmt *mgmt = (void *)buf;
106
107 ASSERT_WDEV_LOCK(wdev);
108
109 trace_cfg80211_rx_mlme_mgmt(dev, buf, len);
110
111 if (WARN_ON(len < 2))
112 return;
113
114 if (ieee80211_is_auth(mgmt->frame_control))
115 cfg80211_process_auth(wdev, buf, len);
116 else if (ieee80211_is_deauth(mgmt->frame_control))
117 cfg80211_process_deauth(wdev, buf, len);
118 else if (ieee80211_is_disassoc(mgmt->frame_control))
119 cfg80211_process_disassoc(wdev, buf, len);
120}
121EXPORT_SYMBOL(cfg80211_rx_mlme_mgmt);
122
123void cfg80211_auth_timeout(struct net_device *dev, const u8 *addr)
124{
125 struct wireless_dev *wdev = dev->ieee80211_ptr;
126 struct wiphy *wiphy = wdev->wiphy;
127 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
128
129 trace_cfg80211_send_auth_timeout(dev, addr);
130
131 nl80211_send_auth_timeout(rdev, dev, addr, GFP_KERNEL);
132 cfg80211_sme_auth_timeout(wdev);
133}
134EXPORT_SYMBOL(cfg80211_auth_timeout);
135
136void cfg80211_assoc_timeout(struct net_device *dev, struct cfg80211_bss *bss)
137{
138 struct wireless_dev *wdev = dev->ieee80211_ptr;
139 struct wiphy *wiphy = wdev->wiphy;
140 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
141
142 trace_cfg80211_send_assoc_timeout(dev, bss->bssid);
143
144 nl80211_send_assoc_timeout(rdev, dev, bss->bssid, GFP_KERNEL);
145 cfg80211_sme_assoc_timeout(wdev);
146
147 cfg80211_unhold_bss(bss_from_pub(bss));
148 cfg80211_put_bss(wiphy, bss);
149}
150EXPORT_SYMBOL(cfg80211_assoc_timeout);
151
152void cfg80211_tx_mlme_mgmt(struct net_device *dev, const u8 *buf, size_t len)
153{
154 struct wireless_dev *wdev = dev->ieee80211_ptr;
155 struct ieee80211_mgmt *mgmt = (void *)buf;
156
157 ASSERT_WDEV_LOCK(wdev);
158
159 trace_cfg80211_tx_mlme_mgmt(dev, buf, len);
160
161 if (WARN_ON(len < 2))
162 return;
163
164 if (ieee80211_is_deauth(mgmt->frame_control))
165 cfg80211_process_deauth(wdev, buf, len);
166 else
167 cfg80211_process_disassoc(wdev, buf, len);
168}
169EXPORT_SYMBOL(cfg80211_tx_mlme_mgmt);
170
171void cfg80211_michael_mic_failure(struct net_device *dev, const u8 *addr,
172 enum nl80211_key_type key_type, int key_id,
173 const u8 *tsc, gfp_t gfp)
174{
175 struct wiphy *wiphy = dev->ieee80211_ptr->wiphy;
176 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
177#ifdef CONFIG_CFG80211_WEXT
178 union iwreq_data wrqu;
179 char *buf = kmalloc(128, gfp);
180
181 if (buf) {
182 sprintf(buf, "MLME-MICHAELMICFAILURE.indication("
183 "keyid=%d %scast addr=%pM)", key_id,
184 key_type == NL80211_KEYTYPE_GROUP ? "broad" : "uni",
185 addr);
186 memset(&wrqu, 0, sizeof(wrqu));
187 wrqu.data.length = strlen(buf);
188 wireless_send_event(dev, IWEVCUSTOM, &wrqu, buf);
189 kfree(buf);
190 }
191#endif
192
193 trace_cfg80211_michael_mic_failure(dev, addr, key_type, key_id, tsc);
194 nl80211_michael_mic_failure(rdev, dev, addr, key_type, key_id, tsc, gfp);
195}
196EXPORT_SYMBOL(cfg80211_michael_mic_failure);
197
198
199int cfg80211_mlme_auth(struct cfg80211_registered_device *rdev,
200 struct net_device *dev,
201 struct ieee80211_channel *chan,
202 enum nl80211_auth_type auth_type,
203 const u8 *bssid,
204 const u8 *ssid, int ssid_len,
205 const u8 *ie, int ie_len,
206 const u8 *key, int key_len, int key_idx,
207 const u8 *sae_data, int sae_data_len)
208{
209 struct wireless_dev *wdev = dev->ieee80211_ptr;
210 struct cfg80211_auth_request req = {
211 .ie = ie,
212 .ie_len = ie_len,
213 .sae_data = sae_data,
214 .sae_data_len = sae_data_len,
215 .auth_type = auth_type,
216 .key = key,
217 .key_len = key_len,
218 .key_idx = key_idx,
219 };
220 int err;
221
222 ASSERT_WDEV_LOCK(wdev);
223
224 if (auth_type == NL80211_AUTHTYPE_SHARED_KEY)
225 if (!key || !key_len || key_idx < 0 || key_idx > 4)
226 return -EINVAL;
227
228 if (wdev->current_bss &&
229 ether_addr_equal(bssid, wdev->current_bss->pub.bssid))
230 return -EALREADY;
231
232 req.bss = cfg80211_get_bss(&rdev->wiphy, chan, bssid, ssid, ssid_len,
233 IEEE80211_BSS_TYPE_ESS,
234 IEEE80211_PRIVACY_ANY);
235 if (!req.bss)
236 return -ENOENT;
237
238 err = rdev_auth(rdev, dev, &req);
239
240 cfg80211_put_bss(&rdev->wiphy, req.bss);
241 return err;
242}
243
244
245void cfg80211_oper_and_ht_capa(struct ieee80211_ht_cap *ht_capa,
246 const struct ieee80211_ht_cap *ht_capa_mask)
247{
248 int i;
249 u8 *p1, *p2;
250 if (!ht_capa_mask) {
251 memset(ht_capa, 0, sizeof(*ht_capa));
252 return;
253 }
254
255 p1 = (u8*)(ht_capa);
256 p2 = (u8*)(ht_capa_mask);
257 for (i = 0; i<sizeof(*ht_capa); i++)
258 p1[i] &= p2[i];
259}
260
261
262void cfg80211_oper_and_vht_capa(struct ieee80211_vht_cap *vht_capa,
263 const struct ieee80211_vht_cap *vht_capa_mask)
264{
265 int i;
266 u8 *p1, *p2;
267 if (!vht_capa_mask) {
268 memset(vht_capa, 0, sizeof(*vht_capa));
269 return;
270 }
271
272 p1 = (u8*)(vht_capa);
273 p2 = (u8*)(vht_capa_mask);
274 for (i = 0; i < sizeof(*vht_capa); i++)
275 p1[i] &= p2[i];
276}
277
278int cfg80211_mlme_assoc(struct cfg80211_registered_device *rdev,
279 struct net_device *dev,
280 struct ieee80211_channel *chan,
281 const u8 *bssid,
282 const u8 *ssid, int ssid_len,
283 struct cfg80211_assoc_request *req)
284{
285 struct wireless_dev *wdev = dev->ieee80211_ptr;
286 int err;
287
288 ASSERT_WDEV_LOCK(wdev);
289
290 if (wdev->current_bss &&
291 (!req->prev_bssid || !ether_addr_equal(wdev->current_bss->pub.bssid,
292 req->prev_bssid)))
293 return -EALREADY;
294
295 cfg80211_oper_and_ht_capa(&req->ht_capa_mask,
296 rdev->wiphy.ht_capa_mod_mask);
297 cfg80211_oper_and_vht_capa(&req->vht_capa_mask,
298 rdev->wiphy.vht_capa_mod_mask);
299
300 req->bss = cfg80211_get_bss(&rdev->wiphy, chan, bssid, ssid, ssid_len,
301 IEEE80211_BSS_TYPE_ESS,
302 IEEE80211_PRIVACY_ANY);
303 if (!req->bss)
304 return -ENOENT;
305
306 err = rdev_assoc(rdev, dev, req);
307 if (!err)
308 cfg80211_hold_bss(bss_from_pub(req->bss));
309 else
310 cfg80211_put_bss(&rdev->wiphy, req->bss);
311
312 return err;
313}
314
315int cfg80211_mlme_deauth(struct cfg80211_registered_device *rdev,
316 struct net_device *dev, const u8 *bssid,
317 const u8 *ie, int ie_len, u16 reason,
318 bool local_state_change)
319{
320 struct wireless_dev *wdev = dev->ieee80211_ptr;
321 struct cfg80211_deauth_request req = {
322 .bssid = bssid,
323 .reason_code = reason,
324 .ie = ie,
325 .ie_len = ie_len,
326 .local_state_change = local_state_change,
327 };
328
329 ASSERT_WDEV_LOCK(wdev);
330
331 if (local_state_change &&
332 (!wdev->current_bss ||
333 !ether_addr_equal(wdev->current_bss->pub.bssid, bssid)))
334 return 0;
335
336 return rdev_deauth(rdev, dev, &req);
337}
338
339int cfg80211_mlme_disassoc(struct cfg80211_registered_device *rdev,
340 struct net_device *dev, const u8 *bssid,
341 const u8 *ie, int ie_len, u16 reason,
342 bool local_state_change)
343{
344 struct wireless_dev *wdev = dev->ieee80211_ptr;
345 struct cfg80211_disassoc_request req = {
346 .reason_code = reason,
347 .local_state_change = local_state_change,
348 .ie = ie,
349 .ie_len = ie_len,
350 };
351 int err;
352
353 ASSERT_WDEV_LOCK(wdev);
354
355 if (!wdev->current_bss)
356 return -ENOTCONN;
357
358 if (ether_addr_equal(wdev->current_bss->pub.bssid, bssid))
359 req.bss = &wdev->current_bss->pub;
360 else
361 return -ENOTCONN;
362
363 err = rdev_disassoc(rdev, dev, &req);
364 if (err)
365 return err;
366
367
368 WARN_ON(wdev->current_bss);
369 return 0;
370}
371
372void cfg80211_mlme_down(struct cfg80211_registered_device *rdev,
373 struct net_device *dev)
374{
375 struct wireless_dev *wdev = dev->ieee80211_ptr;
376 u8 bssid[ETH_ALEN];
377
378 ASSERT_WDEV_LOCK(wdev);
379
380 if (!rdev->ops->deauth)
381 return;
382
383 if (!wdev->current_bss)
384 return;
385
386 memcpy(bssid, wdev->current_bss->pub.bssid, ETH_ALEN);
387 cfg80211_mlme_deauth(rdev, dev, bssid, NULL, 0,
388 WLAN_REASON_DEAUTH_LEAVING, false);
389}
390
391struct cfg80211_mgmt_registration {
392 struct list_head list;
393 struct wireless_dev *wdev;
394
395 u32 nlportid;
396
397 int match_len;
398
399 __le16 frame_type;
400
401 u8 match[];
402};
403
404static void
405cfg80211_process_mlme_unregistrations(struct cfg80211_registered_device *rdev)
406{
407 struct cfg80211_mgmt_registration *reg;
408
409 ASSERT_RTNL();
410
411 spin_lock_bh(&rdev->mlme_unreg_lock);
412 while ((reg = list_first_entry_or_null(&rdev->mlme_unreg,
413 struct cfg80211_mgmt_registration,
414 list))) {
415 list_del(®->list);
416 spin_unlock_bh(&rdev->mlme_unreg_lock);
417
418 if (rdev->ops->mgmt_frame_register) {
419 u16 frame_type = le16_to_cpu(reg->frame_type);
420
421 rdev_mgmt_frame_register(rdev, reg->wdev,
422 frame_type, false);
423 }
424
425 kfree(reg);
426
427 spin_lock_bh(&rdev->mlme_unreg_lock);
428 }
429 spin_unlock_bh(&rdev->mlme_unreg_lock);
430}
431
432void cfg80211_mlme_unreg_wk(struct work_struct *wk)
433{
434 struct cfg80211_registered_device *rdev;
435
436 rdev = container_of(wk, struct cfg80211_registered_device,
437 mlme_unreg_wk);
438
439 rtnl_lock();
440 cfg80211_process_mlme_unregistrations(rdev);
441 rtnl_unlock();
442}
443
444int cfg80211_mlme_register_mgmt(struct wireless_dev *wdev, u32 snd_portid,
445 u16 frame_type, const u8 *match_data,
446 int match_len)
447{
448 struct wiphy *wiphy = wdev->wiphy;
449 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
450 struct cfg80211_mgmt_registration *reg, *nreg;
451 int err = 0;
452 u16 mgmt_type;
453
454 if (!wdev->wiphy->mgmt_stypes)
455 return -EOPNOTSUPP;
456
457 if ((frame_type & IEEE80211_FCTL_FTYPE) != IEEE80211_FTYPE_MGMT)
458 return -EINVAL;
459
460 if (frame_type & ~(IEEE80211_FCTL_FTYPE | IEEE80211_FCTL_STYPE))
461 return -EINVAL;
462
463 mgmt_type = (frame_type & IEEE80211_FCTL_STYPE) >> 4;
464 if (!(wdev->wiphy->mgmt_stypes[wdev->iftype].rx & BIT(mgmt_type)))
465 return -EINVAL;
466
467 nreg = kzalloc(sizeof(*reg) + match_len, GFP_KERNEL);
468 if (!nreg)
469 return -ENOMEM;
470
471 spin_lock_bh(&wdev->mgmt_registrations_lock);
472
473 list_for_each_entry(reg, &wdev->mgmt_registrations, list) {
474 int mlen = min(match_len, reg->match_len);
475
476 if (frame_type != le16_to_cpu(reg->frame_type))
477 continue;
478
479 if (memcmp(reg->match, match_data, mlen) == 0) {
480 err = -EALREADY;
481 break;
482 }
483 }
484
485 if (err) {
486 kfree(nreg);
487 goto out;
488 }
489
490 memcpy(nreg->match, match_data, match_len);
491 nreg->match_len = match_len;
492 nreg->nlportid = snd_portid;
493 nreg->frame_type = cpu_to_le16(frame_type);
494 nreg->wdev = wdev;
495 list_add(&nreg->list, &wdev->mgmt_registrations);
496 spin_unlock_bh(&wdev->mgmt_registrations_lock);
497
498
499 cfg80211_process_mlme_unregistrations(rdev);
500
501 if (rdev->ops->mgmt_frame_register)
502 rdev_mgmt_frame_register(rdev, wdev, frame_type, true);
503
504 return 0;
505
506 out:
507 spin_unlock_bh(&wdev->mgmt_registrations_lock);
508
509 return err;
510}
511
512void cfg80211_mlme_unregister_socket(struct wireless_dev *wdev, u32 nlportid)
513{
514 struct wiphy *wiphy = wdev->wiphy;
515 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
516 struct cfg80211_mgmt_registration *reg, *tmp;
517
518 spin_lock_bh(&wdev->mgmt_registrations_lock);
519
520 list_for_each_entry_safe(reg, tmp, &wdev->mgmt_registrations, list) {
521 if (reg->nlportid != nlportid)
522 continue;
523
524 list_del(®->list);
525 spin_lock(&rdev->mlme_unreg_lock);
526 list_add_tail(®->list, &rdev->mlme_unreg);
527 spin_unlock(&rdev->mlme_unreg_lock);
528
529 schedule_work(&rdev->mlme_unreg_wk);
530 }
531
532 spin_unlock_bh(&wdev->mgmt_registrations_lock);
533
534 if (nlportid && rdev->crit_proto_nlportid == nlportid) {
535 rdev->crit_proto_nlportid = 0;
536 rdev_crit_proto_stop(rdev, wdev);
537 }
538
539 if (nlportid == wdev->ap_unexpected_nlportid)
540 wdev->ap_unexpected_nlportid = 0;
541}
542
543void cfg80211_mlme_purge_registrations(struct wireless_dev *wdev)
544{
545 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
546
547 spin_lock_bh(&wdev->mgmt_registrations_lock);
548 spin_lock(&rdev->mlme_unreg_lock);
549 list_splice_tail_init(&wdev->mgmt_registrations, &rdev->mlme_unreg);
550 spin_unlock(&rdev->mlme_unreg_lock);
551 spin_unlock_bh(&wdev->mgmt_registrations_lock);
552
553 cfg80211_process_mlme_unregistrations(rdev);
554}
555
556int cfg80211_mlme_mgmt_tx(struct cfg80211_registered_device *rdev,
557 struct wireless_dev *wdev,
558 struct cfg80211_mgmt_tx_params *params, u64 *cookie)
559{
560 const struct ieee80211_mgmt *mgmt;
561 u16 stype;
562
563 if (!wdev->wiphy->mgmt_stypes)
564 return -EOPNOTSUPP;
565
566 if (!rdev->ops->mgmt_tx)
567 return -EOPNOTSUPP;
568
569 if (params->len < 24 + 1)
570 return -EINVAL;
571
572 mgmt = (const struct ieee80211_mgmt *)params->buf;
573
574 if (!ieee80211_is_mgmt(mgmt->frame_control))
575 return -EINVAL;
576
577 stype = le16_to_cpu(mgmt->frame_control) & IEEE80211_FCTL_STYPE;
578 if (!(wdev->wiphy->mgmt_stypes[wdev->iftype].tx & BIT(stype >> 4)))
579 return -EINVAL;
580
581 if (ieee80211_is_action(mgmt->frame_control) &&
582 mgmt->u.action.category != WLAN_CATEGORY_PUBLIC) {
583 int err = 0;
584
585 wdev_lock(wdev);
586
587 switch (wdev->iftype) {
588 case NL80211_IFTYPE_ADHOC:
589 case NL80211_IFTYPE_STATION:
590 case NL80211_IFTYPE_P2P_CLIENT:
591 if (!wdev->current_bss) {
592 err = -ENOTCONN;
593 break;
594 }
595
596 if (!ether_addr_equal(wdev->current_bss->pub.bssid,
597 mgmt->bssid)) {
598 err = -ENOTCONN;
599 break;
600 }
601
602
603
604
605
606 if (wdev->iftype == NL80211_IFTYPE_ADHOC)
607 break;
608
609
610 if (!ether_addr_equal(wdev->current_bss->pub.bssid,
611 mgmt->da)) {
612 err = -ENOTCONN;
613 break;
614 }
615 break;
616 case NL80211_IFTYPE_AP:
617 case NL80211_IFTYPE_P2P_GO:
618 case NL80211_IFTYPE_AP_VLAN:
619 if (!ether_addr_equal(mgmt->bssid, wdev_address(wdev)))
620 err = -EINVAL;
621 break;
622 case NL80211_IFTYPE_MESH_POINT:
623 if (!ether_addr_equal(mgmt->sa, mgmt->bssid)) {
624 err = -EINVAL;
625 break;
626 }
627
628
629
630
631 break;
632 case NL80211_IFTYPE_P2P_DEVICE:
633
634
635
636
637 default:
638 err = -EOPNOTSUPP;
639 break;
640 }
641 wdev_unlock(wdev);
642
643 if (err)
644 return err;
645 }
646
647 if (!ether_addr_equal(mgmt->sa, wdev_address(wdev)))
648 return -EINVAL;
649
650
651 return rdev_mgmt_tx(rdev, wdev, params, cookie);
652}
653
654bool cfg80211_rx_mgmt(struct wireless_dev *wdev, int freq, int sig_mbm,
655 const u8 *buf, size_t len, u32 flags)
656{
657 struct wiphy *wiphy = wdev->wiphy;
658 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
659 struct cfg80211_mgmt_registration *reg;
660 const struct ieee80211_txrx_stypes *stypes =
661 &wiphy->mgmt_stypes[wdev->iftype];
662 struct ieee80211_mgmt *mgmt = (void *)buf;
663 const u8 *data;
664 int data_len;
665 bool result = false;
666 __le16 ftype = mgmt->frame_control &
667 cpu_to_le16(IEEE80211_FCTL_FTYPE | IEEE80211_FCTL_STYPE);
668 u16 stype;
669
670 trace_cfg80211_rx_mgmt(wdev, freq, sig_mbm);
671 stype = (le16_to_cpu(mgmt->frame_control) & IEEE80211_FCTL_STYPE) >> 4;
672
673 if (!(stypes->rx & BIT(stype))) {
674 trace_cfg80211_return_bool(false);
675 return false;
676 }
677
678 data = buf + ieee80211_hdrlen(mgmt->frame_control);
679 data_len = len - ieee80211_hdrlen(mgmt->frame_control);
680
681 spin_lock_bh(&wdev->mgmt_registrations_lock);
682
683 list_for_each_entry(reg, &wdev->mgmt_registrations, list) {
684 if (reg->frame_type != ftype)
685 continue;
686
687 if (reg->match_len > data_len)
688 continue;
689
690 if (memcmp(reg->match, data, reg->match_len))
691 continue;
692
693
694
695
696 if (nl80211_send_mgmt(rdev, wdev, reg->nlportid,
697 freq, sig_mbm,
698 buf, len, flags, GFP_ATOMIC))
699 continue;
700
701 result = true;
702 break;
703 }
704
705 spin_unlock_bh(&wdev->mgmt_registrations_lock);
706
707 trace_cfg80211_return_bool(result);
708 return result;
709}
710EXPORT_SYMBOL(cfg80211_rx_mgmt);
711
712void cfg80211_dfs_channels_update_work(struct work_struct *work)
713{
714 struct delayed_work *delayed_work = to_delayed_work(work);
715 struct cfg80211_registered_device *rdev;
716 struct cfg80211_chan_def chandef;
717 struct ieee80211_supported_band *sband;
718 struct ieee80211_channel *c;
719 struct wiphy *wiphy;
720 bool check_again = false;
721 unsigned long timeout, next_time = 0;
722 int bandid, i;
723
724 rdev = container_of(delayed_work, struct cfg80211_registered_device,
725 dfs_update_channels_wk);
726 wiphy = &rdev->wiphy;
727
728 rtnl_lock();
729 for (bandid = 0; bandid < IEEE80211_NUM_BANDS; bandid++) {
730 sband = wiphy->bands[bandid];
731 if (!sband)
732 continue;
733
734 for (i = 0; i < sband->n_channels; i++) {
735 c = &sband->channels[i];
736
737 if (c->dfs_state != NL80211_DFS_UNAVAILABLE)
738 continue;
739
740 timeout = c->dfs_state_entered + msecs_to_jiffies(
741 IEEE80211_DFS_MIN_NOP_TIME_MS);
742
743 if (time_after_eq(jiffies, timeout)) {
744 c->dfs_state = NL80211_DFS_USABLE;
745 c->dfs_state_entered = jiffies;
746
747 cfg80211_chandef_create(&chandef, c,
748 NL80211_CHAN_NO_HT);
749
750 nl80211_radar_notify(rdev, &chandef,
751 NL80211_RADAR_NOP_FINISHED,
752 NULL, GFP_ATOMIC);
753 continue;
754 }
755
756 if (!check_again)
757 next_time = timeout - jiffies;
758 else
759 next_time = min(next_time, timeout - jiffies);
760 check_again = true;
761 }
762 }
763 rtnl_unlock();
764
765
766 if (check_again)
767 queue_delayed_work(cfg80211_wq, &rdev->dfs_update_channels_wk,
768 next_time);
769}
770
771
772void cfg80211_radar_event(struct wiphy *wiphy,
773 struct cfg80211_chan_def *chandef,
774 gfp_t gfp)
775{
776 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
777 unsigned long timeout;
778
779 trace_cfg80211_radar_event(wiphy, chandef);
780
781
782
783
784
785 cfg80211_set_dfs_state(wiphy, chandef, NL80211_DFS_UNAVAILABLE);
786
787 timeout = msecs_to_jiffies(IEEE80211_DFS_MIN_NOP_TIME_MS);
788 queue_delayed_work(cfg80211_wq, &rdev->dfs_update_channels_wk,
789 timeout);
790
791 nl80211_radar_notify(rdev, chandef, NL80211_RADAR_DETECTED, NULL, gfp);
792}
793EXPORT_SYMBOL(cfg80211_radar_event);
794
795void cfg80211_cac_event(struct net_device *netdev,
796 const struct cfg80211_chan_def *chandef,
797 enum nl80211_radar_event event, gfp_t gfp)
798{
799 struct wireless_dev *wdev = netdev->ieee80211_ptr;
800 struct wiphy *wiphy = wdev->wiphy;
801 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
802 unsigned long timeout;
803
804 trace_cfg80211_cac_event(netdev, event);
805
806 if (WARN_ON(!wdev->cac_started))
807 return;
808
809 if (WARN_ON(!wdev->chandef.chan))
810 return;
811
812 switch (event) {
813 case NL80211_RADAR_CAC_FINISHED:
814 timeout = wdev->cac_start_time +
815 msecs_to_jiffies(wdev->cac_time_ms);
816 WARN_ON(!time_after_eq(jiffies, timeout));
817 cfg80211_set_dfs_state(wiphy, chandef, NL80211_DFS_AVAILABLE);
818 break;
819 case NL80211_RADAR_CAC_ABORTED:
820 break;
821 default:
822 WARN_ON(1);
823 return;
824 }
825 wdev->cac_started = false;
826
827 nl80211_radar_notify(rdev, chandef, event, netdev, gfp);
828}
829EXPORT_SYMBOL(cfg80211_cac_event);
830
