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7#include <linux/kernel.h>
8#include <linux/module.h>
9#include <linux/etherdevice.h>
10#include <linux/netdevice.h>
11#include <linux/nl80211.h>
12#include <linux/slab.h>
13#include <linux/wireless.h>
14#include <net/cfg80211.h>
15#include <net/iw_handler.h>
16#include "core.h"
17#include "nl80211.h"
18#include "rdev-ops.h"
19
20
21void cfg80211_rx_assoc_resp(struct net_device *dev, struct cfg80211_bss *bss,
22 const u8 *buf, size_t len)
23{
24 struct wireless_dev *wdev = dev->ieee80211_ptr;
25 struct wiphy *wiphy = wdev->wiphy;
26 struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
27 struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)buf;
28 u8 *ie = mgmt->u.assoc_resp.variable;
29 int ieoffs = offsetof(struct ieee80211_mgmt, u.assoc_resp.variable);
30 u16 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
31
32 trace_cfg80211_send_rx_assoc(dev, bss);
33
34
35
36
37
38
39
40 if (cfg80211_sme_rx_assoc_resp(wdev, status_code)) {
41 cfg80211_unhold_bss(bss_from_pub(bss));
42 cfg80211_put_bss(wiphy, bss);
43 return;
44 }
45
46 nl80211_send_rx_assoc(rdev, dev, buf, len, GFP_KERNEL);
47
48 __cfg80211_connect_result(dev, mgmt->bssid, NULL, 0, ie, len - ieoffs,
49 status_code,
50 status_code == WLAN_STATUS_SUCCESS, bss);
51}
52EXPORT_SYMBOL(cfg80211_rx_assoc_resp);
53
54static void cfg80211_process_auth(struct wireless_dev *wdev,
55 const u8 *buf, size_t len)
56{
57 struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
58
59 nl80211_send_rx_auth(rdev, wdev->netdev, buf, len, GFP_KERNEL);
60 cfg80211_sme_rx_auth(wdev, buf, len);
61}
62
63static void cfg80211_process_deauth(struct wireless_dev *wdev,
64 const u8 *buf, size_t len)
65{
66 struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
67 struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)buf;
68 const u8 *bssid = mgmt->bssid;
69 u16 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
70 bool from_ap = !ether_addr_equal(mgmt->sa, wdev->netdev->dev_addr);
71
72 nl80211_send_deauth(rdev, wdev->netdev, buf, len, GFP_KERNEL);
73
74 if (!wdev->current_bss ||
75 !ether_addr_equal(wdev->current_bss->pub.bssid, bssid))
76 return;
77
78 __cfg80211_disconnected(wdev->netdev, NULL, 0, reason_code, from_ap);
79 cfg80211_sme_deauth(wdev);
80}
81
82static void cfg80211_process_disassoc(struct wireless_dev *wdev,
83 const u8 *buf, size_t len)
84{
85 struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
86 struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)buf;
87 const u8 *bssid = mgmt->bssid;
88 u16 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
89 bool from_ap = !ether_addr_equal(mgmt->sa, wdev->netdev->dev_addr);
90
91 nl80211_send_disassoc(rdev, wdev->netdev, buf, len, GFP_KERNEL);
92
93 if (WARN_ON(!wdev->current_bss ||
94 !ether_addr_equal(wdev->current_bss->pub.bssid, bssid)))
95 return;
96
97 __cfg80211_disconnected(wdev->netdev, NULL, 0, reason_code, from_ap);
98 cfg80211_sme_disassoc(wdev);
99}
100
101void cfg80211_rx_mlme_mgmt(struct net_device *dev, const u8 *buf, size_t len)
102{
103 struct wireless_dev *wdev = dev->ieee80211_ptr;
104 struct ieee80211_mgmt *mgmt = (void *)buf;
105
106 ASSERT_WDEV_LOCK(wdev);
107
108 trace_cfg80211_rx_mlme_mgmt(dev, buf, len);
109
110 if (WARN_ON(len < 2))
111 return;
112
113 if (ieee80211_is_auth(mgmt->frame_control))
114 cfg80211_process_auth(wdev, buf, len);
115 else if (ieee80211_is_deauth(mgmt->frame_control))
116 cfg80211_process_deauth(wdev, buf, len);
117 else if (ieee80211_is_disassoc(mgmt->frame_control))
118 cfg80211_process_disassoc(wdev, buf, len);
119}
120EXPORT_SYMBOL(cfg80211_rx_mlme_mgmt);
121
122void cfg80211_auth_timeout(struct net_device *dev, const u8 *addr)
123{
124 struct wireless_dev *wdev = dev->ieee80211_ptr;
125 struct wiphy *wiphy = wdev->wiphy;
126 struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
127
128 trace_cfg80211_send_auth_timeout(dev, addr);
129
130 nl80211_send_auth_timeout(rdev, dev, addr, GFP_KERNEL);
131 cfg80211_sme_auth_timeout(wdev);
132}
133EXPORT_SYMBOL(cfg80211_auth_timeout);
134
135void cfg80211_assoc_timeout(struct net_device *dev, struct cfg80211_bss *bss)
136{
137 struct wireless_dev *wdev = dev->ieee80211_ptr;
138 struct wiphy *wiphy = wdev->wiphy;
139 struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
140
141 trace_cfg80211_send_assoc_timeout(dev, bss->bssid);
142
143 nl80211_send_assoc_timeout(rdev, dev, bss->bssid, GFP_KERNEL);
144 cfg80211_sme_assoc_timeout(wdev);
145
146 cfg80211_unhold_bss(bss_from_pub(bss));
147 cfg80211_put_bss(wiphy, bss);
148}
149EXPORT_SYMBOL(cfg80211_assoc_timeout);
150
151void cfg80211_tx_mlme_mgmt(struct net_device *dev, const u8 *buf, size_t len)
152{
153 struct wireless_dev *wdev = dev->ieee80211_ptr;
154 struct ieee80211_mgmt *mgmt = (void *)buf;
155
156 ASSERT_WDEV_LOCK(wdev);
157
158 trace_cfg80211_tx_mlme_mgmt(dev, buf, len);
159
160 if (WARN_ON(len < 2))
161 return;
162
163 if (ieee80211_is_deauth(mgmt->frame_control))
164 cfg80211_process_deauth(wdev, buf, len);
165 else
166 cfg80211_process_disassoc(wdev, buf, len);
167}
168EXPORT_SYMBOL(cfg80211_tx_mlme_mgmt);
169
170void cfg80211_michael_mic_failure(struct net_device *dev, const u8 *addr,
171 enum nl80211_key_type key_type, int key_id,
172 const u8 *tsc, gfp_t gfp)
173{
174 struct wiphy *wiphy = dev->ieee80211_ptr->wiphy;
175 struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
176#ifdef CONFIG_CFG80211_WEXT
177 union iwreq_data wrqu;
178 char *buf = kmalloc(128, gfp);
179
180 if (buf) {
181 sprintf(buf, "MLME-MICHAELMICFAILURE.indication("
182 "keyid=%d %scast addr=%pM)", key_id,
183 key_type == NL80211_KEYTYPE_GROUP ? "broad" : "uni",
184 addr);
185 memset(&wrqu, 0, sizeof(wrqu));
186 wrqu.data.length = strlen(buf);
187 wireless_send_event(dev, IWEVCUSTOM, &wrqu, buf);
188 kfree(buf);
189 }
190#endif
191
192 trace_cfg80211_michael_mic_failure(dev, addr, key_type, key_id, tsc);
193 nl80211_michael_mic_failure(rdev, dev, addr, key_type, key_id, tsc, gfp);
194}
195EXPORT_SYMBOL(cfg80211_michael_mic_failure);
196
197
198int cfg80211_mlme_auth(struct cfg80211_registered_device *rdev,
199 struct net_device *dev,
200 struct ieee80211_channel *chan,
201 enum nl80211_auth_type auth_type,
202 const u8 *bssid,
203 const u8 *ssid, int ssid_len,
204 const u8 *ie, int ie_len,
205 const u8 *key, int key_len, int key_idx,
206 const u8 *sae_data, int sae_data_len)
207{
208 struct wireless_dev *wdev = dev->ieee80211_ptr;
209 struct cfg80211_auth_request req = {
210 .ie = ie,
211 .ie_len = ie_len,
212 .sae_data = sae_data,
213 .sae_data_len = sae_data_len,
214 .auth_type = auth_type,
215 .key = key,
216 .key_len = key_len,
217 .key_idx = key_idx,
218 };
219 int err;
220
221 ASSERT_WDEV_LOCK(wdev);
222
223 if (auth_type == NL80211_AUTHTYPE_SHARED_KEY)
224 if (!key || !key_len || key_idx < 0 || key_idx > 4)
225 return -EINVAL;
226
227 if (wdev->current_bss &&
228 ether_addr_equal(bssid, wdev->current_bss->pub.bssid))
229 return -EALREADY;
230
231 req.bss = cfg80211_get_bss(&rdev->wiphy, chan, bssid, ssid, ssid_len,
232 WLAN_CAPABILITY_ESS, WLAN_CAPABILITY_ESS);
233 if (!req.bss)
234 return -ENOENT;
235
236 err = cfg80211_can_use_chan(rdev, wdev, req.bss->channel,
237 CHAN_MODE_SHARED);
238 if (err)
239 goto out;
240
241 err = rdev_auth(rdev, dev, &req);
242
243out:
244 cfg80211_put_bss(&rdev->wiphy, req.bss);
245 return err;
246}
247
248
249void cfg80211_oper_and_ht_capa(struct ieee80211_ht_cap *ht_capa,
250 const struct ieee80211_ht_cap *ht_capa_mask)
251{
252 int i;
253 u8 *p1, *p2;
254 if (!ht_capa_mask) {
255 memset(ht_capa, 0, sizeof(*ht_capa));
256 return;
257 }
258
259 p1 = (u8*)(ht_capa);
260 p2 = (u8*)(ht_capa_mask);
261 for (i = 0; i<sizeof(*ht_capa); i++)
262 p1[i] &= p2[i];
263}
264
265
266void cfg80211_oper_and_vht_capa(struct ieee80211_vht_cap *vht_capa,
267 const struct ieee80211_vht_cap *vht_capa_mask)
268{
269 int i;
270 u8 *p1, *p2;
271 if (!vht_capa_mask) {
272 memset(vht_capa, 0, sizeof(*vht_capa));
273 return;
274 }
275
276 p1 = (u8*)(vht_capa);
277 p2 = (u8*)(vht_capa_mask);
278 for (i = 0; i < sizeof(*vht_capa); i++)
279 p1[i] &= p2[i];
280}
281
282int cfg80211_mlme_assoc(struct cfg80211_registered_device *rdev,
283 struct net_device *dev,
284 struct ieee80211_channel *chan,
285 const u8 *bssid,
286 const u8 *ssid, int ssid_len,
287 struct cfg80211_assoc_request *req)
288{
289 struct wireless_dev *wdev = dev->ieee80211_ptr;
290 int err;
291
292 ASSERT_WDEV_LOCK(wdev);
293
294 if (wdev->current_bss &&
295 (!req->prev_bssid || !ether_addr_equal(wdev->current_bss->pub.bssid,
296 req->prev_bssid)))
297 return -EALREADY;
298
299 cfg80211_oper_and_ht_capa(&req->ht_capa_mask,
300 rdev->wiphy.ht_capa_mod_mask);
301 cfg80211_oper_and_vht_capa(&req->vht_capa_mask,
302 rdev->wiphy.vht_capa_mod_mask);
303
304 req->bss = cfg80211_get_bss(&rdev->wiphy, chan, bssid, ssid, ssid_len,
305 WLAN_CAPABILITY_ESS, WLAN_CAPABILITY_ESS);
306 if (!req->bss)
307 return -ENOENT;
308
309 err = cfg80211_can_use_chan(rdev, wdev, chan, CHAN_MODE_SHARED);
310 if (err)
311 goto out;
312
313 err = rdev_assoc(rdev, dev, req);
314 if (!err)
315 cfg80211_hold_bss(bss_from_pub(req->bss));
316
317out:
318 if (err)
319 cfg80211_put_bss(&rdev->wiphy, req->bss);
320
321 return err;
322}
323
324int cfg80211_mlme_deauth(struct cfg80211_registered_device *rdev,
325 struct net_device *dev, const u8 *bssid,
326 const u8 *ie, int ie_len, u16 reason,
327 bool local_state_change)
328{
329 struct wireless_dev *wdev = dev->ieee80211_ptr;
330 struct cfg80211_deauth_request req = {
331 .bssid = bssid,
332 .reason_code = reason,
333 .ie = ie,
334 .ie_len = ie_len,
335 .local_state_change = local_state_change,
336 };
337
338 ASSERT_WDEV_LOCK(wdev);
339
340 if (local_state_change &&
341 (!wdev->current_bss ||
342 !ether_addr_equal(wdev->current_bss->pub.bssid, bssid)))
343 return 0;
344
345 return rdev_deauth(rdev, dev, &req);
346}
347
348int cfg80211_mlme_disassoc(struct cfg80211_registered_device *rdev,
349 struct net_device *dev, const u8 *bssid,
350 const u8 *ie, int ie_len, u16 reason,
351 bool local_state_change)
352{
353 struct wireless_dev *wdev = dev->ieee80211_ptr;
354 struct cfg80211_disassoc_request req = {
355 .reason_code = reason,
356 .local_state_change = local_state_change,
357 .ie = ie,
358 .ie_len = ie_len,
359 };
360 int err;
361
362 ASSERT_WDEV_LOCK(wdev);
363
364 if (!wdev->current_bss)
365 return -ENOTCONN;
366
367 if (ether_addr_equal(wdev->current_bss->pub.bssid, bssid))
368 req.bss = &wdev->current_bss->pub;
369 else
370 return -ENOTCONN;
371
372 err = rdev_disassoc(rdev, dev, &req);
373 if (err)
374 return err;
375
376
377 WARN_ON(wdev->current_bss);
378 return 0;
379}
380
381void cfg80211_mlme_down(struct cfg80211_registered_device *rdev,
382 struct net_device *dev)
383{
384 struct wireless_dev *wdev = dev->ieee80211_ptr;
385 u8 bssid[ETH_ALEN];
386
387 ASSERT_WDEV_LOCK(wdev);
388
389 if (!rdev->ops->deauth)
390 return;
391
392 if (!wdev->current_bss)
393 return;
394
395 memcpy(bssid, wdev->current_bss->pub.bssid, ETH_ALEN);
396 cfg80211_mlme_deauth(rdev, dev, bssid, NULL, 0,
397 WLAN_REASON_DEAUTH_LEAVING, false);
398}
399
400struct cfg80211_mgmt_registration {
401 struct list_head list;
402
403 u32 nlportid;
404
405 int match_len;
406
407 __le16 frame_type;
408
409 u8 match[];
410};
411
412int cfg80211_mlme_register_mgmt(struct wireless_dev *wdev, u32 snd_portid,
413 u16 frame_type, const u8 *match_data,
414 int match_len)
415{
416 struct wiphy *wiphy = wdev->wiphy;
417 struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
418 struct cfg80211_mgmt_registration *reg, *nreg;
419 int err = 0;
420 u16 mgmt_type;
421
422 if (!wdev->wiphy->mgmt_stypes)
423 return -EOPNOTSUPP;
424
425 if ((frame_type & IEEE80211_FCTL_FTYPE) != IEEE80211_FTYPE_MGMT)
426 return -EINVAL;
427
428 if (frame_type & ~(IEEE80211_FCTL_FTYPE | IEEE80211_FCTL_STYPE))
429 return -EINVAL;
430
431 mgmt_type = (frame_type & IEEE80211_FCTL_STYPE) >> 4;
432 if (!(wdev->wiphy->mgmt_stypes[wdev->iftype].rx & BIT(mgmt_type)))
433 return -EINVAL;
434
435 nreg = kzalloc(sizeof(*reg) + match_len, GFP_KERNEL);
436 if (!nreg)
437 return -ENOMEM;
438
439 spin_lock_bh(&wdev->mgmt_registrations_lock);
440
441 list_for_each_entry(reg, &wdev->mgmt_registrations, list) {
442 int mlen = min(match_len, reg->match_len);
443
444 if (frame_type != le16_to_cpu(reg->frame_type))
445 continue;
446
447 if (memcmp(reg->match, match_data, mlen) == 0) {
448 err = -EALREADY;
449 break;
450 }
451 }
452
453 if (err) {
454 kfree(nreg);
455 goto out;
456 }
457
458 memcpy(nreg->match, match_data, match_len);
459 nreg->match_len = match_len;
460 nreg->nlportid = snd_portid;
461 nreg->frame_type = cpu_to_le16(frame_type);
462 list_add(&nreg->list, &wdev->mgmt_registrations);
463
464 if (rdev->ops->mgmt_frame_register)
465 rdev_mgmt_frame_register(rdev, wdev, frame_type, true);
466
467 out:
468 spin_unlock_bh(&wdev->mgmt_registrations_lock);
469
470 return err;
471}
472
473void cfg80211_mlme_unregister_socket(struct wireless_dev *wdev, u32 nlportid)
474{
475 struct wiphy *wiphy = wdev->wiphy;
476 struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
477 struct cfg80211_mgmt_registration *reg, *tmp;
478
479 spin_lock_bh(&wdev->mgmt_registrations_lock);
480
481 list_for_each_entry_safe(reg, tmp, &wdev->mgmt_registrations, list) {
482 if (reg->nlportid != nlportid)
483 continue;
484
485 if (rdev->ops->mgmt_frame_register) {
486 u16 frame_type = le16_to_cpu(reg->frame_type);
487
488 rdev_mgmt_frame_register(rdev, wdev,
489 frame_type, false);
490 }
491
492 list_del(®->list);
493 kfree(reg);
494 }
495
496 spin_unlock_bh(&wdev->mgmt_registrations_lock);
497
498 if (nlportid && rdev->crit_proto_nlportid == nlportid) {
499 rdev->crit_proto_nlportid = 0;
500 rdev_crit_proto_stop(rdev, wdev);
501 }
502
503 if (nlportid == wdev->ap_unexpected_nlportid)
504 wdev->ap_unexpected_nlportid = 0;
505}
506
507void cfg80211_mlme_purge_registrations(struct wireless_dev *wdev)
508{
509 struct cfg80211_mgmt_registration *reg, *tmp;
510
511 spin_lock_bh(&wdev->mgmt_registrations_lock);
512
513 list_for_each_entry_safe(reg, tmp, &wdev->mgmt_registrations, list) {
514 list_del(®->list);
515 kfree(reg);
516 }
517
518 spin_unlock_bh(&wdev->mgmt_registrations_lock);
519}
520
521int cfg80211_mlme_mgmt_tx(struct cfg80211_registered_device *rdev,
522 struct wireless_dev *wdev,
523 struct ieee80211_channel *chan, bool offchan,
524 unsigned int wait, const u8 *buf, size_t len,
525 bool no_cck, bool dont_wait_for_ack, u64 *cookie)
526{
527 const struct ieee80211_mgmt *mgmt;
528 u16 stype;
529
530 if (!wdev->wiphy->mgmt_stypes)
531 return -EOPNOTSUPP;
532
533 if (!rdev->ops->mgmt_tx)
534 return -EOPNOTSUPP;
535
536 if (len < 24 + 1)
537 return -EINVAL;
538
539 mgmt = (const struct ieee80211_mgmt *) buf;
540
541 if (!ieee80211_is_mgmt(mgmt->frame_control))
542 return -EINVAL;
543
544 stype = le16_to_cpu(mgmt->frame_control) & IEEE80211_FCTL_STYPE;
545 if (!(wdev->wiphy->mgmt_stypes[wdev->iftype].tx & BIT(stype >> 4)))
546 return -EINVAL;
547
548 if (ieee80211_is_action(mgmt->frame_control) &&
549 mgmt->u.action.category != WLAN_CATEGORY_PUBLIC) {
550 int err = 0;
551
552 wdev_lock(wdev);
553
554 switch (wdev->iftype) {
555 case NL80211_IFTYPE_ADHOC:
556 case NL80211_IFTYPE_STATION:
557 case NL80211_IFTYPE_P2P_CLIENT:
558 if (!wdev->current_bss) {
559 err = -ENOTCONN;
560 break;
561 }
562
563 if (!ether_addr_equal(wdev->current_bss->pub.bssid,
564 mgmt->bssid)) {
565 err = -ENOTCONN;
566 break;
567 }
568
569
570
571
572
573 if (wdev->iftype == NL80211_IFTYPE_ADHOC)
574 break;
575
576
577 if (!ether_addr_equal(wdev->current_bss->pub.bssid,
578 mgmt->da)) {
579 err = -ENOTCONN;
580 break;
581 }
582 break;
583 case NL80211_IFTYPE_AP:
584 case NL80211_IFTYPE_P2P_GO:
585 case NL80211_IFTYPE_AP_VLAN:
586 if (!ether_addr_equal(mgmt->bssid, wdev_address(wdev)))
587 err = -EINVAL;
588 break;
589 case NL80211_IFTYPE_MESH_POINT:
590 if (!ether_addr_equal(mgmt->sa, mgmt->bssid)) {
591 err = -EINVAL;
592 break;
593 }
594
595
596
597
598 break;
599 case NL80211_IFTYPE_P2P_DEVICE:
600
601
602
603
604 default:
605 err = -EOPNOTSUPP;
606 break;
607 }
608 wdev_unlock(wdev);
609
610 if (err)
611 return err;
612 }
613
614 if (!ether_addr_equal(mgmt->sa, wdev_address(wdev)))
615 return -EINVAL;
616
617
618 return rdev_mgmt_tx(rdev, wdev, chan, offchan,
619 wait, buf, len, no_cck, dont_wait_for_ack,
620 cookie);
621}
622
623bool cfg80211_rx_mgmt(struct wireless_dev *wdev, int freq, int sig_mbm,
624 const u8 *buf, size_t len, gfp_t gfp)
625{
626 struct wiphy *wiphy = wdev->wiphy;
627 struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
628 struct cfg80211_mgmt_registration *reg;
629 const struct ieee80211_txrx_stypes *stypes =
630 &wiphy->mgmt_stypes[wdev->iftype];
631 struct ieee80211_mgmt *mgmt = (void *)buf;
632 const u8 *data;
633 int data_len;
634 bool result = false;
635 __le16 ftype = mgmt->frame_control &
636 cpu_to_le16(IEEE80211_FCTL_FTYPE | IEEE80211_FCTL_STYPE);
637 u16 stype;
638
639 trace_cfg80211_rx_mgmt(wdev, freq, sig_mbm);
640 stype = (le16_to_cpu(mgmt->frame_control) & IEEE80211_FCTL_STYPE) >> 4;
641
642 if (!(stypes->rx & BIT(stype))) {
643 trace_cfg80211_return_bool(false);
644 return false;
645 }
646
647 data = buf + ieee80211_hdrlen(mgmt->frame_control);
648 data_len = len - ieee80211_hdrlen(mgmt->frame_control);
649
650 spin_lock_bh(&wdev->mgmt_registrations_lock);
651
652 list_for_each_entry(reg, &wdev->mgmt_registrations, list) {
653 if (reg->frame_type != ftype)
654 continue;
655
656 if (reg->match_len > data_len)
657 continue;
658
659 if (memcmp(reg->match, data, reg->match_len))
660 continue;
661
662
663
664
665 if (nl80211_send_mgmt(rdev, wdev, reg->nlportid,
666 freq, sig_mbm,
667 buf, len, gfp))
668 continue;
669
670 result = true;
671 break;
672 }
673
674 spin_unlock_bh(&wdev->mgmt_registrations_lock);
675
676 trace_cfg80211_return_bool(result);
677 return result;
678}
679EXPORT_SYMBOL(cfg80211_rx_mgmt);
680
681void cfg80211_dfs_channels_update_work(struct work_struct *work)
682{
683 struct delayed_work *delayed_work;
684 struct cfg80211_registered_device *rdev;
685 struct cfg80211_chan_def chandef;
686 struct ieee80211_supported_band *sband;
687 struct ieee80211_channel *c;
688 struct wiphy *wiphy;
689 bool check_again = false;
690 unsigned long timeout, next_time = 0;
691 int bandid, i;
692
693 delayed_work = container_of(work, struct delayed_work, work);
694 rdev = container_of(delayed_work, struct cfg80211_registered_device,
695 dfs_update_channels_wk);
696 wiphy = &rdev->wiphy;
697
698 rtnl_lock();
699 for (bandid = 0; bandid < IEEE80211_NUM_BANDS; bandid++) {
700 sband = wiphy->bands[bandid];
701 if (!sband)
702 continue;
703
704 for (i = 0; i < sband->n_channels; i++) {
705 c = &sband->channels[i];
706
707 if (c->dfs_state != NL80211_DFS_UNAVAILABLE)
708 continue;
709
710 timeout = c->dfs_state_entered +
711 IEEE80211_DFS_MIN_NOP_TIME_MS;
712
713 if (time_after_eq(jiffies, timeout)) {
714 c->dfs_state = NL80211_DFS_USABLE;
715 cfg80211_chandef_create(&chandef, c,
716 NL80211_CHAN_NO_HT);
717
718 nl80211_radar_notify(rdev, &chandef,
719 NL80211_RADAR_NOP_FINISHED,
720 NULL, GFP_ATOMIC);
721 continue;
722 }
723
724 if (!check_again)
725 next_time = timeout - jiffies;
726 else
727 next_time = min(next_time, timeout - jiffies);
728 check_again = true;
729 }
730 }
731 rtnl_unlock();
732
733
734 if (check_again)
735 queue_delayed_work(cfg80211_wq, &rdev->dfs_update_channels_wk,
736 next_time);
737}
738
739
740void cfg80211_radar_event(struct wiphy *wiphy,
741 struct cfg80211_chan_def *chandef,
742 gfp_t gfp)
743{
744 struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
745 unsigned long timeout;
746
747 trace_cfg80211_radar_event(wiphy, chandef);
748
749
750
751
752
753 cfg80211_set_dfs_state(wiphy, chandef, NL80211_DFS_UNAVAILABLE);
754
755 timeout = msecs_to_jiffies(IEEE80211_DFS_MIN_NOP_TIME_MS);
756 queue_delayed_work(cfg80211_wq, &rdev->dfs_update_channels_wk,
757 timeout);
758
759 nl80211_radar_notify(rdev, chandef, NL80211_RADAR_DETECTED, NULL, gfp);
760}
761EXPORT_SYMBOL(cfg80211_radar_event);
762
763void cfg80211_cac_event(struct net_device *netdev,
764 enum nl80211_radar_event event, gfp_t gfp)
765{
766 struct wireless_dev *wdev = netdev->ieee80211_ptr;
767 struct wiphy *wiphy = wdev->wiphy;
768 struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
769 struct cfg80211_chan_def chandef;
770 unsigned long timeout;
771
772 trace_cfg80211_cac_event(netdev, event);
773
774 if (WARN_ON(!wdev->cac_started))
775 return;
776
777 if (WARN_ON(!wdev->channel))
778 return;
779
780 cfg80211_chandef_create(&chandef, wdev->channel, NL80211_CHAN_NO_HT);
781
782 switch (event) {
783 case NL80211_RADAR_CAC_FINISHED:
784 timeout = wdev->cac_start_time +
785 msecs_to_jiffies(IEEE80211_DFS_MIN_CAC_TIME_MS);
786 WARN_ON(!time_after_eq(jiffies, timeout));
787 cfg80211_set_dfs_state(wiphy, &chandef, NL80211_DFS_AVAILABLE);
788 break;
789 case NL80211_RADAR_CAC_ABORTED:
790 break;
791 default:
792 WARN_ON(1);
793 return;
794 }
795 wdev->cac_started = false;
796
797 nl80211_radar_notify(rdev, &chandef, event, netdev, gfp);
798}
799EXPORT_SYMBOL(cfg80211_cac_event);
800
