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1// SPDX-License-Identifier: GPL-2.0
2/*
3 * cfg80211 MLME SAP interface
4 *
5 * Copyright (c) 2009, Jouni Malinen <j@w1.fi>
6 * Copyright (c) 2015 Intel Deutschland GmbH
7 * Copyright (C) 2019-2020, 2022-2023 Intel Corporation
8 */
9
10#include <linux/kernel.h>
11#include <linux/module.h>
12#include <linux/etherdevice.h>
13#include <linux/netdevice.h>
14#include <linux/nl80211.h>
15#include <linux/slab.h>
16#include <linux/wireless.h>
17#include <net/cfg80211.h>
18#include <net/iw_handler.h>
19#include "core.h"
20#include "nl80211.h"
21#include "rdev-ops.h"
22
23
24void cfg80211_rx_assoc_resp(struct net_device *dev,
25 const struct cfg80211_rx_assoc_resp_data *data)
26{
27 struct wireless_dev *wdev = dev->ieee80211_ptr;
28 struct wiphy *wiphy = wdev->wiphy;
29 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
30 struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)data->buf;
31 struct cfg80211_connect_resp_params cr = {
32 .timeout_reason = NL80211_TIMEOUT_UNSPECIFIED,
33 .req_ie = data->req_ies,
34 .req_ie_len = data->req_ies_len,
35 .resp_ie = mgmt->u.assoc_resp.variable,
36 .resp_ie_len = data->len -
37 offsetof(struct ieee80211_mgmt,
38 u.assoc_resp.variable),
39 .status = le16_to_cpu(mgmt->u.assoc_resp.status_code),
40 .ap_mld_addr = data->ap_mld_addr,
41 };
42 unsigned int link_id;
43
44 for (link_id = 0; link_id < ARRAY_SIZE(data->links); link_id++) {
45 cr.links[link_id].status = data->links[link_id].status;
46 cr.links[link_id].bss = data->links[link_id].bss;
47
48 WARN_ON_ONCE(cr.links[link_id].status != WLAN_STATUS_SUCCESS &&
49 (!cr.ap_mld_addr || !cr.links[link_id].bss));
50
51 if (!cr.links[link_id].bss)
52 continue;
53 cr.links[link_id].bssid = data->links[link_id].bss->bssid;
54 cr.links[link_id].addr = data->links[link_id].addr;
55 /* need to have local link addresses for MLO connections */
56 WARN_ON(cr.ap_mld_addr &&
57 !is_valid_ether_addr(cr.links[link_id].addr));
58
59 BUG_ON(!cr.links[link_id].bss->channel);
60
61 if (cr.links[link_id].bss->channel->band == NL80211_BAND_S1GHZ) {
62 WARN_ON(link_id);
63 cr.resp_ie = (u8 *)&mgmt->u.s1g_assoc_resp.variable;
64 cr.resp_ie_len = data->len -
65 offsetof(struct ieee80211_mgmt,
66 u.s1g_assoc_resp.variable);
67 }
68
69 if (cr.ap_mld_addr)
70 cr.valid_links |= BIT(link_id);
71 }
72
73 trace_cfg80211_send_rx_assoc(dev, data);
74
75 /*
76 * This is a bit of a hack, we don't notify userspace of
77 * a (re-)association reply if we tried to send a reassoc
78 * and got a reject -- we only try again with an assoc
79 * frame instead of reassoc.
80 */
81 if (cfg80211_sme_rx_assoc_resp(wdev, cr.status)) {
82 for (link_id = 0; link_id < ARRAY_SIZE(data->links); link_id++) {
83 struct cfg80211_bss *bss = data->links[link_id].bss;
84
85 if (!bss)
86 continue;
87
88 cfg80211_unhold_bss(bss_from_pub(bss));
89 cfg80211_put_bss(wiphy, bss);
90 }
91 return;
92 }
93
94 nl80211_send_rx_assoc(rdev, dev, data);
95 /* update current_bss etc., consumes the bss reference */
96 __cfg80211_connect_result(dev, &cr, cr.status == WLAN_STATUS_SUCCESS);
97}
98EXPORT_SYMBOL(cfg80211_rx_assoc_resp);
99
100static void cfg80211_process_auth(struct wireless_dev *wdev,
101 const u8 *buf, size_t len)
102{
103 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
104
105 nl80211_send_rx_auth(rdev, wdev->netdev, buf, len, GFP_KERNEL);
106 cfg80211_sme_rx_auth(wdev, buf, len);
107}
108
109static void cfg80211_process_deauth(struct wireless_dev *wdev,
110 const u8 *buf, size_t len,
111 bool reconnect)
112{
113 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
114 struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)buf;
115 const u8 *bssid = mgmt->bssid;
116 u16 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
117 bool from_ap = !ether_addr_equal(mgmt->sa, wdev->netdev->dev_addr);
118
119 nl80211_send_deauth(rdev, wdev->netdev, buf, len, reconnect, GFP_KERNEL);
120
121 if (!wdev->connected || !ether_addr_equal(wdev->u.client.connected_addr, bssid))
122 return;
123
124 __cfg80211_disconnected(wdev->netdev, NULL, 0, reason_code, from_ap);
125 cfg80211_sme_deauth(wdev);
126}
127
128static void cfg80211_process_disassoc(struct wireless_dev *wdev,
129 const u8 *buf, size_t len,
130 bool reconnect)
131{
132 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
133 struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)buf;
134 const u8 *bssid = mgmt->bssid;
135 u16 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
136 bool from_ap = !ether_addr_equal(mgmt->sa, wdev->netdev->dev_addr);
137
138 nl80211_send_disassoc(rdev, wdev->netdev, buf, len, reconnect,
139 GFP_KERNEL);
140
141 if (WARN_ON(!wdev->connected ||
142 !ether_addr_equal(wdev->u.client.connected_addr, bssid)))
143 return;
144
145 __cfg80211_disconnected(wdev->netdev, NULL, 0, reason_code, from_ap);
146 cfg80211_sme_disassoc(wdev);
147}
148
149void cfg80211_rx_mlme_mgmt(struct net_device *dev, const u8 *buf, size_t len)
150{
151 struct wireless_dev *wdev = dev->ieee80211_ptr;
152 struct ieee80211_mgmt *mgmt = (void *)buf;
153
154 lockdep_assert_wiphy(wdev->wiphy);
155
156 trace_cfg80211_rx_mlme_mgmt(dev, buf, len);
157
158 if (WARN_ON(len < 2))
159 return;
160
161 if (ieee80211_is_auth(mgmt->frame_control))
162 cfg80211_process_auth(wdev, buf, len);
163 else if (ieee80211_is_deauth(mgmt->frame_control))
164 cfg80211_process_deauth(wdev, buf, len, false);
165 else if (ieee80211_is_disassoc(mgmt->frame_control))
166 cfg80211_process_disassoc(wdev, buf, len, false);
167}
168EXPORT_SYMBOL(cfg80211_rx_mlme_mgmt);
169
170void cfg80211_auth_timeout(struct net_device *dev, const u8 *addr)
171{
172 struct wireless_dev *wdev = dev->ieee80211_ptr;
173 struct wiphy *wiphy = wdev->wiphy;
174 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
175
176 trace_cfg80211_send_auth_timeout(dev, addr);
177
178 nl80211_send_auth_timeout(rdev, dev, addr, GFP_KERNEL);
179 cfg80211_sme_auth_timeout(wdev);
180}
181EXPORT_SYMBOL(cfg80211_auth_timeout);
182
183void cfg80211_assoc_failure(struct net_device *dev,
184 struct cfg80211_assoc_failure *data)
185{
186 struct wireless_dev *wdev = dev->ieee80211_ptr;
187 struct wiphy *wiphy = wdev->wiphy;
188 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
189 const u8 *addr = data->ap_mld_addr ?: data->bss[0]->bssid;
190 int i;
191
192 trace_cfg80211_send_assoc_failure(dev, data);
193
194 if (data->timeout) {
195 nl80211_send_assoc_timeout(rdev, dev, addr, GFP_KERNEL);
196 cfg80211_sme_assoc_timeout(wdev);
197 } else {
198 cfg80211_sme_abandon_assoc(wdev);
199 }
200
201 for (i = 0; i < ARRAY_SIZE(data->bss); i++) {
202 struct cfg80211_bss *bss = data->bss[i];
203
204 if (!bss)
205 continue;
206
207 cfg80211_unhold_bss(bss_from_pub(bss));
208 cfg80211_put_bss(wiphy, bss);
209 }
210}
211EXPORT_SYMBOL(cfg80211_assoc_failure);
212
213void cfg80211_tx_mlme_mgmt(struct net_device *dev, const u8 *buf, size_t len,
214 bool reconnect)
215{
216 struct wireless_dev *wdev = dev->ieee80211_ptr;
217 struct ieee80211_mgmt *mgmt = (void *)buf;
218
219 lockdep_assert_wiphy(wdev->wiphy);
220
221 trace_cfg80211_tx_mlme_mgmt(dev, buf, len, reconnect);
222
223 if (WARN_ON(len < 2))
224 return;
225
226 if (ieee80211_is_deauth(mgmt->frame_control))
227 cfg80211_process_deauth(wdev, buf, len, reconnect);
228 else
229 cfg80211_process_disassoc(wdev, buf, len, reconnect);
230}
231EXPORT_SYMBOL(cfg80211_tx_mlme_mgmt);
232
233void cfg80211_michael_mic_failure(struct net_device *dev, const u8 *addr,
234 enum nl80211_key_type key_type, int key_id,
235 const u8 *tsc, gfp_t gfp)
236{
237 struct wiphy *wiphy = dev->ieee80211_ptr->wiphy;
238 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
239#ifdef CONFIG_CFG80211_WEXT
240 union iwreq_data wrqu;
241 char *buf = kmalloc(128, gfp);
242
243 if (buf) {
244 sprintf(buf, "MLME-MICHAELMICFAILURE.indication("
245 "keyid=%d %scast addr=%pM)", key_id,
246 key_type == NL80211_KEYTYPE_GROUP ? "broad" : "uni",
247 addr);
248 memset(&wrqu, 0, sizeof(wrqu));
249 wrqu.data.length = strlen(buf);
250 wireless_send_event(dev, IWEVCUSTOM, &wrqu, buf);
251 kfree(buf);
252 }
253#endif
254
255 trace_cfg80211_michael_mic_failure(dev, addr, key_type, key_id, tsc);
256 nl80211_michael_mic_failure(rdev, dev, addr, key_type, key_id, tsc, gfp);
257}
258EXPORT_SYMBOL(cfg80211_michael_mic_failure);
259
260/* some MLME handling for userspace SME */
261int cfg80211_mlme_auth(struct cfg80211_registered_device *rdev,
262 struct net_device *dev,
263 struct cfg80211_auth_request *req)
264{
265 struct wireless_dev *wdev = dev->ieee80211_ptr;
266
267 lockdep_assert_wiphy(wdev->wiphy);
268
269 if (!req->bss)
270 return -ENOENT;
271
272 if (req->link_id >= 0 &&
273 !(wdev->wiphy->flags & WIPHY_FLAG_SUPPORTS_MLO))
274 return -EINVAL;
275
276 if (req->auth_type == NL80211_AUTHTYPE_SHARED_KEY) {
277 if (!req->key || !req->key_len ||
278 req->key_idx < 0 || req->key_idx > 3)
279 return -EINVAL;
280 }
281
282 if (wdev->connected &&
283 ether_addr_equal(req->bss->bssid, wdev->u.client.connected_addr))
284 return -EALREADY;
285
286 if (ether_addr_equal(req->bss->bssid, dev->dev_addr) ||
287 (req->link_id >= 0 &&
288 ether_addr_equal(req->ap_mld_addr, dev->dev_addr)))
289 return -EINVAL;
290
291 return rdev_auth(rdev, dev, req);
292}
293
294/* Do a logical ht_capa &= ht_capa_mask. */
295void cfg80211_oper_and_ht_capa(struct ieee80211_ht_cap *ht_capa,
296 const struct ieee80211_ht_cap *ht_capa_mask)
297{
298 int i;
299 u8 *p1, *p2;
300 if (!ht_capa_mask) {
301 memset(ht_capa, 0, sizeof(*ht_capa));
302 return;
303 }
304
305 p1 = (u8*)(ht_capa);
306 p2 = (u8*)(ht_capa_mask);
307 for (i = 0; i < sizeof(*ht_capa); i++)
308 p1[i] &= p2[i];
309}
310
311/* Do a logical vht_capa &= vht_capa_mask. */
312void cfg80211_oper_and_vht_capa(struct ieee80211_vht_cap *vht_capa,
313 const struct ieee80211_vht_cap *vht_capa_mask)
314{
315 int i;
316 u8 *p1, *p2;
317 if (!vht_capa_mask) {
318 memset(vht_capa, 0, sizeof(*vht_capa));
319 return;
320 }
321
322 p1 = (u8*)(vht_capa);
323 p2 = (u8*)(vht_capa_mask);
324 for (i = 0; i < sizeof(*vht_capa); i++)
325 p1[i] &= p2[i];
326}
327
328/* Note: caller must cfg80211_put_bss() regardless of result */
329int cfg80211_mlme_assoc(struct cfg80211_registered_device *rdev,
330 struct net_device *dev,
331 struct cfg80211_assoc_request *req)
332{
333 struct wireless_dev *wdev = dev->ieee80211_ptr;
334 int err, i, j;
335
336 lockdep_assert_wiphy(wdev->wiphy);
337
338 for (i = 1; i < ARRAY_SIZE(req->links); i++) {
339 if (!req->links[i].bss)
340 continue;
341 for (j = 0; j < i; j++) {
342 if (req->links[i].bss == req->links[j].bss)
343 return -EINVAL;
344 }
345
346 if (ether_addr_equal(req->links[i].bss->bssid, dev->dev_addr))
347 return -EINVAL;
348 }
349
350 if (wdev->connected &&
351 (!req->prev_bssid ||
352 !ether_addr_equal(wdev->u.client.connected_addr, req->prev_bssid)))
353 return -EALREADY;
354
355 if ((req->bss && ether_addr_equal(req->bss->bssid, dev->dev_addr)) ||
356 (req->link_id >= 0 &&
357 ether_addr_equal(req->ap_mld_addr, dev->dev_addr)))
358 return -EINVAL;
359
360 cfg80211_oper_and_ht_capa(&req->ht_capa_mask,
361 rdev->wiphy.ht_capa_mod_mask);
362 cfg80211_oper_and_vht_capa(&req->vht_capa_mask,
363 rdev->wiphy.vht_capa_mod_mask);
364
365 err = rdev_assoc(rdev, dev, req);
366 if (!err) {
367 int link_id;
368
369 if (req->bss) {
370 cfg80211_ref_bss(&rdev->wiphy, req->bss);
371 cfg80211_hold_bss(bss_from_pub(req->bss));
372 }
373
374 for (link_id = 0; link_id < ARRAY_SIZE(req->links); link_id++) {
375 if (!req->links[link_id].bss)
376 continue;
377 cfg80211_ref_bss(&rdev->wiphy, req->links[link_id].bss);
378 cfg80211_hold_bss(bss_from_pub(req->links[link_id].bss));
379 }
380 }
381 return err;
382}
383
384int cfg80211_mlme_deauth(struct cfg80211_registered_device *rdev,
385 struct net_device *dev, const u8 *bssid,
386 const u8 *ie, int ie_len, u16 reason,
387 bool local_state_change)
388{
389 struct wireless_dev *wdev = dev->ieee80211_ptr;
390 struct cfg80211_deauth_request req = {
391 .bssid = bssid,
392 .reason_code = reason,
393 .ie = ie,
394 .ie_len = ie_len,
395 .local_state_change = local_state_change,
396 };
397
398 lockdep_assert_wiphy(wdev->wiphy);
399
400 if (local_state_change &&
401 (!wdev->connected ||
402 !ether_addr_equal(wdev->u.client.connected_addr, bssid)))
403 return 0;
404
405 if (ether_addr_equal(wdev->disconnect_bssid, bssid) ||
406 (wdev->connected &&
407 ether_addr_equal(wdev->u.client.connected_addr, bssid)))
408 wdev->conn_owner_nlportid = 0;
409
410 return rdev_deauth(rdev, dev, &req);
411}
412
413int cfg80211_mlme_disassoc(struct cfg80211_registered_device *rdev,
414 struct net_device *dev, const u8 *ap_addr,
415 const u8 *ie, int ie_len, u16 reason,
416 bool local_state_change)
417{
418 struct wireless_dev *wdev = dev->ieee80211_ptr;
419 struct cfg80211_disassoc_request req = {
420 .reason_code = reason,
421 .local_state_change = local_state_change,
422 .ie = ie,
423 .ie_len = ie_len,
424 .ap_addr = ap_addr,
425 };
426 int err;
427
428 lockdep_assert_wiphy(wdev->wiphy);
429
430 if (!wdev->connected)
431 return -ENOTCONN;
432
433 if (memcmp(wdev->u.client.connected_addr, ap_addr, ETH_ALEN))
434 return -ENOTCONN;
435
436 err = rdev_disassoc(rdev, dev, &req);
437 if (err)
438 return err;
439
440 /* driver should have reported the disassoc */
441 WARN_ON(wdev->connected);
442 return 0;
443}
444
445void cfg80211_mlme_down(struct cfg80211_registered_device *rdev,
446 struct net_device *dev)
447{
448 struct wireless_dev *wdev = dev->ieee80211_ptr;
449 u8 bssid[ETH_ALEN];
450
451 lockdep_assert_wiphy(wdev->wiphy);
452
453 if (!rdev->ops->deauth)
454 return;
455
456 if (!wdev->connected)
457 return;
458
459 memcpy(bssid, wdev->u.client.connected_addr, ETH_ALEN);
460 cfg80211_mlme_deauth(rdev, dev, bssid, NULL, 0,
461 WLAN_REASON_DEAUTH_LEAVING, false);
462}
463
464struct cfg80211_mgmt_registration {
465 struct list_head list;
466 struct wireless_dev *wdev;
467
468 u32 nlportid;
469
470 int match_len;
471
472 __le16 frame_type;
473
474 bool multicast_rx;
475
476 u8 match[];
477};
478
479static void cfg80211_mgmt_registrations_update(struct wireless_dev *wdev)
480{
481 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
482 struct wireless_dev *tmp;
483 struct cfg80211_mgmt_registration *reg;
484 struct mgmt_frame_regs upd = {};
485
486 lockdep_assert_held(&rdev->wiphy.mtx);
487
488 spin_lock_bh(&rdev->mgmt_registrations_lock);
489 if (!wdev->mgmt_registrations_need_update) {
490 spin_unlock_bh(&rdev->mgmt_registrations_lock);
491 return;
492 }
493
494 rcu_read_lock();
495 list_for_each_entry_rcu(tmp, &rdev->wiphy.wdev_list, list) {
496 list_for_each_entry(reg, &tmp->mgmt_registrations, list) {
497 u32 mask = BIT(le16_to_cpu(reg->frame_type) >> 4);
498 u32 mcast_mask = 0;
499
500 if (reg->multicast_rx)
501 mcast_mask = mask;
502
503 upd.global_stypes |= mask;
504 upd.global_mcast_stypes |= mcast_mask;
505
506 if (tmp == wdev) {
507 upd.interface_stypes |= mask;
508 upd.interface_mcast_stypes |= mcast_mask;
509 }
510 }
511 }
512 rcu_read_unlock();
513
514 wdev->mgmt_registrations_need_update = 0;
515 spin_unlock_bh(&rdev->mgmt_registrations_lock);
516
517 rdev_update_mgmt_frame_registrations(rdev, wdev, &upd);
518}
519
520void cfg80211_mgmt_registrations_update_wk(struct work_struct *wk)
521{
522 struct cfg80211_registered_device *rdev;
523 struct wireless_dev *wdev;
524
525 rdev = container_of(wk, struct cfg80211_registered_device,
526 mgmt_registrations_update_wk);
527
528 wiphy_lock(&rdev->wiphy);
529 list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list)
530 cfg80211_mgmt_registrations_update(wdev);
531 wiphy_unlock(&rdev->wiphy);
532}
533
534int cfg80211_mlme_register_mgmt(struct wireless_dev *wdev, u32 snd_portid,
535 u16 frame_type, const u8 *match_data,
536 int match_len, bool multicast_rx,
537 struct netlink_ext_ack *extack)
538{
539 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
540 struct cfg80211_mgmt_registration *reg, *nreg;
541 int err = 0;
542 u16 mgmt_type;
543 bool update_multicast = false;
544
545 if (!wdev->wiphy->mgmt_stypes)
546 return -EOPNOTSUPP;
547
548 if ((frame_type & IEEE80211_FCTL_FTYPE) != IEEE80211_FTYPE_MGMT) {
549 NL_SET_ERR_MSG(extack, "frame type not management");
550 return -EINVAL;
551 }
552
553 if (frame_type & ~(IEEE80211_FCTL_FTYPE | IEEE80211_FCTL_STYPE)) {
554 NL_SET_ERR_MSG(extack, "Invalid frame type");
555 return -EINVAL;
556 }
557
558 mgmt_type = (frame_type & IEEE80211_FCTL_STYPE) >> 4;
559 if (!(wdev->wiphy->mgmt_stypes[wdev->iftype].rx & BIT(mgmt_type))) {
560 NL_SET_ERR_MSG(extack,
561 "Registration to specific type not supported");
562 return -EINVAL;
563 }
564
565 /*
566 * To support Pre Association Security Negotiation (PASN), registration
567 * for authentication frames should be supported. However, as some
568 * versions of the user space daemons wrongly register to all types of
569 * authentication frames (which might result in unexpected behavior)
570 * allow such registration if the request is for a specific
571 * authentication algorithm number.
572 */
573 if (wdev->iftype == NL80211_IFTYPE_STATION &&
574 (frame_type & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_AUTH &&
575 !(match_data && match_len >= 2)) {
576 NL_SET_ERR_MSG(extack,
577 "Authentication algorithm number required");
578 return -EINVAL;
579 }
580
581 nreg = kzalloc(sizeof(*reg) + match_len, GFP_KERNEL);
582 if (!nreg)
583 return -ENOMEM;
584
585 spin_lock_bh(&rdev->mgmt_registrations_lock);
586
587 list_for_each_entry(reg, &wdev->mgmt_registrations, list) {
588 int mlen = min(match_len, reg->match_len);
589
590 if (frame_type != le16_to_cpu(reg->frame_type))
591 continue;
592
593 if (memcmp(reg->match, match_data, mlen) == 0) {
594 if (reg->multicast_rx != multicast_rx) {
595 update_multicast = true;
596 reg->multicast_rx = multicast_rx;
597 break;
598 }
599 NL_SET_ERR_MSG(extack, "Match already configured");
600 err = -EALREADY;
601 break;
602 }
603 }
604
605 if (err)
606 goto out;
607
608 if (update_multicast) {
609 kfree(nreg);
610 } else {
611 memcpy(nreg->match, match_data, match_len);
612 nreg->match_len = match_len;
613 nreg->nlportid = snd_portid;
614 nreg->frame_type = cpu_to_le16(frame_type);
615 nreg->wdev = wdev;
616 nreg->multicast_rx = multicast_rx;
617 list_add(&nreg->list, &wdev->mgmt_registrations);
618 }
619 wdev->mgmt_registrations_need_update = 1;
620 spin_unlock_bh(&rdev->mgmt_registrations_lock);
621
622 cfg80211_mgmt_registrations_update(wdev);
623
624 return 0;
625
626 out:
627 kfree(nreg);
628 spin_unlock_bh(&rdev->mgmt_registrations_lock);
629
630 return err;
631}
632
633void cfg80211_mlme_unregister_socket(struct wireless_dev *wdev, u32 nlportid)
634{
635 struct wiphy *wiphy = wdev->wiphy;
636 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
637 struct cfg80211_mgmt_registration *reg, *tmp;
638
639 spin_lock_bh(&rdev->mgmt_registrations_lock);
640
641 list_for_each_entry_safe(reg, tmp, &wdev->mgmt_registrations, list) {
642 if (reg->nlportid != nlportid)
643 continue;
644
645 list_del(®->list);
646 kfree(reg);
647
648 wdev->mgmt_registrations_need_update = 1;
649 schedule_work(&rdev->mgmt_registrations_update_wk);
650 }
651
652 spin_unlock_bh(&rdev->mgmt_registrations_lock);
653
654 if (nlportid && rdev->crit_proto_nlportid == nlportid) {
655 rdev->crit_proto_nlportid = 0;
656 rdev_crit_proto_stop(rdev, wdev);
657 }
658
659 if (nlportid == wdev->ap_unexpected_nlportid)
660 wdev->ap_unexpected_nlportid = 0;
661}
662
663void cfg80211_mlme_purge_registrations(struct wireless_dev *wdev)
664{
665 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
666 struct cfg80211_mgmt_registration *reg, *tmp;
667
668 spin_lock_bh(&rdev->mgmt_registrations_lock);
669 list_for_each_entry_safe(reg, tmp, &wdev->mgmt_registrations, list) {
670 list_del(®->list);
671 kfree(reg);
672 }
673 wdev->mgmt_registrations_need_update = 1;
674 spin_unlock_bh(&rdev->mgmt_registrations_lock);
675
676 cfg80211_mgmt_registrations_update(wdev);
677}
678
679static bool cfg80211_allowed_address(struct wireless_dev *wdev, const u8 *addr)
680{
681 int i;
682
683 for_each_valid_link(wdev, i) {
684 if (ether_addr_equal(addr, wdev->links[i].addr))
685 return true;
686 }
687
688 return ether_addr_equal(addr, wdev_address(wdev));
689}
690
691static bool cfg80211_allowed_random_address(struct wireless_dev *wdev,
692 const struct ieee80211_mgmt *mgmt)
693{
694 if (ieee80211_is_auth(mgmt->frame_control) ||
695 ieee80211_is_deauth(mgmt->frame_control)) {
696 /* Allow random TA to be used with authentication and
697 * deauthentication frames if the driver has indicated support.
698 */
699 if (wiphy_ext_feature_isset(
700 wdev->wiphy,
701 NL80211_EXT_FEATURE_AUTH_AND_DEAUTH_RANDOM_TA))
702 return true;
703 } else if (ieee80211_is_action(mgmt->frame_control) &&
704 mgmt->u.action.category == WLAN_CATEGORY_PUBLIC) {
705 /* Allow random TA to be used with Public Action frames if the
706 * driver has indicated support.
707 */
708 if (!wdev->connected &&
709 wiphy_ext_feature_isset(
710 wdev->wiphy,
711 NL80211_EXT_FEATURE_MGMT_TX_RANDOM_TA))
712 return true;
713
714 if (wdev->connected &&
715 wiphy_ext_feature_isset(
716 wdev->wiphy,
717 NL80211_EXT_FEATURE_MGMT_TX_RANDOM_TA_CONNECTED))
718 return true;
719 }
720
721 return false;
722}
723
724int cfg80211_mlme_mgmt_tx(struct cfg80211_registered_device *rdev,
725 struct wireless_dev *wdev,
726 struct cfg80211_mgmt_tx_params *params, u64 *cookie)
727{
728 const struct ieee80211_mgmt *mgmt;
729 u16 stype;
730
731 lockdep_assert_wiphy(&rdev->wiphy);
732
733 if (!wdev->wiphy->mgmt_stypes)
734 return -EOPNOTSUPP;
735
736 if (!rdev->ops->mgmt_tx)
737 return -EOPNOTSUPP;
738
739 if (params->len < 24 + 1)
740 return -EINVAL;
741
742 mgmt = (const struct ieee80211_mgmt *)params->buf;
743
744 if (!ieee80211_is_mgmt(mgmt->frame_control))
745 return -EINVAL;
746
747 stype = le16_to_cpu(mgmt->frame_control) & IEEE80211_FCTL_STYPE;
748 if (!(wdev->wiphy->mgmt_stypes[wdev->iftype].tx & BIT(stype >> 4)))
749 return -EINVAL;
750
751 if (ieee80211_is_action(mgmt->frame_control) &&
752 mgmt->u.action.category != WLAN_CATEGORY_PUBLIC) {
753 int err = 0;
754
755 switch (wdev->iftype) {
756 case NL80211_IFTYPE_ADHOC:
757 /*
758 * check for IBSS DA must be done by driver as
759 * cfg80211 doesn't track the stations
760 */
761 if (!wdev->u.ibss.current_bss ||
762 !ether_addr_equal(wdev->u.ibss.current_bss->pub.bssid,
763 mgmt->bssid)) {
764 err = -ENOTCONN;
765 break;
766 }
767 break;
768 case NL80211_IFTYPE_STATION:
769 case NL80211_IFTYPE_P2P_CLIENT:
770 if (!wdev->connected) {
771 err = -ENOTCONN;
772 break;
773 }
774
775 /* FIXME: MLD may address this differently */
776
777 if (!ether_addr_equal(wdev->u.client.connected_addr,
778 mgmt->bssid)) {
779 err = -ENOTCONN;
780 break;
781 }
782
783 /* for station, check that DA is the AP */
784 if (!ether_addr_equal(wdev->u.client.connected_addr,
785 mgmt->da)) {
786 err = -ENOTCONN;
787 break;
788 }
789 break;
790 case NL80211_IFTYPE_AP:
791 case NL80211_IFTYPE_P2P_GO:
792 case NL80211_IFTYPE_AP_VLAN:
793 if (!ether_addr_equal(mgmt->bssid, wdev_address(wdev)) &&
794 (params->link_id < 0 ||
795 !ether_addr_equal(mgmt->bssid,
796 wdev->links[params->link_id].addr)))
797 err = -EINVAL;
798 break;
799 case NL80211_IFTYPE_MESH_POINT:
800 if (!ether_addr_equal(mgmt->sa, mgmt->bssid)) {
801 err = -EINVAL;
802 break;
803 }
804 /*
805 * check for mesh DA must be done by driver as
806 * cfg80211 doesn't track the stations
807 */
808 break;
809 case NL80211_IFTYPE_P2P_DEVICE:
810 /*
811 * fall through, P2P device only supports
812 * public action frames
813 */
814 case NL80211_IFTYPE_NAN:
815 default:
816 err = -EOPNOTSUPP;
817 break;
818 }
819
820 if (err)
821 return err;
822 }
823
824 if (!cfg80211_allowed_address(wdev, mgmt->sa) &&
825 !cfg80211_allowed_random_address(wdev, mgmt))
826 return -EINVAL;
827
828 /* Transmit the management frame as requested by user space */
829 return rdev_mgmt_tx(rdev, wdev, params, cookie);
830}
831
832bool cfg80211_rx_mgmt_ext(struct wireless_dev *wdev,
833 struct cfg80211_rx_info *info)
834{
835 struct wiphy *wiphy = wdev->wiphy;
836 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
837 struct cfg80211_mgmt_registration *reg;
838 const struct ieee80211_txrx_stypes *stypes =
839 &wiphy->mgmt_stypes[wdev->iftype];
840 struct ieee80211_mgmt *mgmt = (void *)info->buf;
841 const u8 *data;
842 int data_len;
843 bool result = false;
844 __le16 ftype = mgmt->frame_control &
845 cpu_to_le16(IEEE80211_FCTL_FTYPE | IEEE80211_FCTL_STYPE);
846 u16 stype;
847
848 trace_cfg80211_rx_mgmt(wdev, info);
849 stype = (le16_to_cpu(mgmt->frame_control) & IEEE80211_FCTL_STYPE) >> 4;
850
851 if (!(stypes->rx & BIT(stype))) {
852 trace_cfg80211_return_bool(false);
853 return false;
854 }
855
856 data = info->buf + ieee80211_hdrlen(mgmt->frame_control);
857 data_len = info->len - ieee80211_hdrlen(mgmt->frame_control);
858
859 spin_lock_bh(&rdev->mgmt_registrations_lock);
860
861 list_for_each_entry(reg, &wdev->mgmt_registrations, list) {
862 if (reg->frame_type != ftype)
863 continue;
864
865 if (reg->match_len > data_len)
866 continue;
867
868 if (memcmp(reg->match, data, reg->match_len))
869 continue;
870
871 /* found match! */
872
873 /* Indicate the received Action frame to user space */
874 if (nl80211_send_mgmt(rdev, wdev, reg->nlportid, info,
875 GFP_ATOMIC))
876 continue;
877
878 result = true;
879 break;
880 }
881
882 spin_unlock_bh(&rdev->mgmt_registrations_lock);
883
884 trace_cfg80211_return_bool(result);
885 return result;
886}
887EXPORT_SYMBOL(cfg80211_rx_mgmt_ext);
888
889void cfg80211_sched_dfs_chan_update(struct cfg80211_registered_device *rdev)
890{
891 cancel_delayed_work(&rdev->dfs_update_channels_wk);
892 queue_delayed_work(cfg80211_wq, &rdev->dfs_update_channels_wk, 0);
893}
894
895void cfg80211_dfs_channels_update_work(struct work_struct *work)
896{
897 struct delayed_work *delayed_work = to_delayed_work(work);
898 struct cfg80211_registered_device *rdev;
899 struct cfg80211_chan_def chandef;
900 struct ieee80211_supported_band *sband;
901 struct ieee80211_channel *c;
902 struct wiphy *wiphy;
903 bool check_again = false;
904 unsigned long timeout, next_time = 0;
905 unsigned long time_dfs_update;
906 enum nl80211_radar_event radar_event;
907 int bandid, i;
908
909 rdev = container_of(delayed_work, struct cfg80211_registered_device,
910 dfs_update_channels_wk);
911 wiphy = &rdev->wiphy;
912
913 rtnl_lock();
914 for (bandid = 0; bandid < NUM_NL80211_BANDS; bandid++) {
915 sband = wiphy->bands[bandid];
916 if (!sband)
917 continue;
918
919 for (i = 0; i < sband->n_channels; i++) {
920 c = &sband->channels[i];
921
922 if (!(c->flags & IEEE80211_CHAN_RADAR))
923 continue;
924
925 if (c->dfs_state != NL80211_DFS_UNAVAILABLE &&
926 c->dfs_state != NL80211_DFS_AVAILABLE)
927 continue;
928
929 if (c->dfs_state == NL80211_DFS_UNAVAILABLE) {
930 time_dfs_update = IEEE80211_DFS_MIN_NOP_TIME_MS;
931 radar_event = NL80211_RADAR_NOP_FINISHED;
932 } else {
933 if (regulatory_pre_cac_allowed(wiphy) ||
934 cfg80211_any_wiphy_oper_chan(wiphy, c))
935 continue;
936
937 time_dfs_update = REG_PRE_CAC_EXPIRY_GRACE_MS;
938 radar_event = NL80211_RADAR_PRE_CAC_EXPIRED;
939 }
940
941 timeout = c->dfs_state_entered +
942 msecs_to_jiffies(time_dfs_update);
943
944 if (time_after_eq(jiffies, timeout)) {
945 c->dfs_state = NL80211_DFS_USABLE;
946 c->dfs_state_entered = jiffies;
947
948 cfg80211_chandef_create(&chandef, c,
949 NL80211_CHAN_NO_HT);
950
951 nl80211_radar_notify(rdev, &chandef,
952 radar_event, NULL,
953 GFP_ATOMIC);
954
955 regulatory_propagate_dfs_state(wiphy, &chandef,
956 c->dfs_state,
957 radar_event);
958 continue;
959 }
960
961 if (!check_again)
962 next_time = timeout - jiffies;
963 else
964 next_time = min(next_time, timeout - jiffies);
965 check_again = true;
966 }
967 }
968 rtnl_unlock();
969
970 /* reschedule if there are other channels waiting to be cleared again */
971 if (check_again)
972 queue_delayed_work(cfg80211_wq, &rdev->dfs_update_channels_wk,
973 next_time);
974}
975
976
977void __cfg80211_radar_event(struct wiphy *wiphy,
978 struct cfg80211_chan_def *chandef,
979 bool offchan, gfp_t gfp)
980{
981 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
982
983 trace_cfg80211_radar_event(wiphy, chandef, offchan);
984
985 /* only set the chandef supplied channel to unavailable, in
986 * case the radar is detected on only one of multiple channels
987 * spanned by the chandef.
988 */
989 cfg80211_set_dfs_state(wiphy, chandef, NL80211_DFS_UNAVAILABLE);
990
991 if (offchan)
992 queue_work(cfg80211_wq, &rdev->background_cac_abort_wk);
993
994 cfg80211_sched_dfs_chan_update(rdev);
995
996 nl80211_radar_notify(rdev, chandef, NL80211_RADAR_DETECTED, NULL, gfp);
997
998 memcpy(&rdev->radar_chandef, chandef, sizeof(struct cfg80211_chan_def));
999 queue_work(cfg80211_wq, &rdev->propagate_radar_detect_wk);
1000}
1001EXPORT_SYMBOL(__cfg80211_radar_event);
1002
1003void cfg80211_cac_event(struct net_device *netdev,
1004 const struct cfg80211_chan_def *chandef,
1005 enum nl80211_radar_event event, gfp_t gfp)
1006{
1007 struct wireless_dev *wdev = netdev->ieee80211_ptr;
1008 struct wiphy *wiphy = wdev->wiphy;
1009 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
1010 unsigned long timeout;
1011
1012 /* not yet supported */
1013 if (wdev->valid_links)
1014 return;
1015
1016 trace_cfg80211_cac_event(netdev, event);
1017
1018 if (WARN_ON(!wdev->cac_started && event != NL80211_RADAR_CAC_STARTED))
1019 return;
1020
1021 switch (event) {
1022 case NL80211_RADAR_CAC_FINISHED:
1023 timeout = wdev->cac_start_time +
1024 msecs_to_jiffies(wdev->cac_time_ms);
1025 WARN_ON(!time_after_eq(jiffies, timeout));
1026 cfg80211_set_dfs_state(wiphy, chandef, NL80211_DFS_AVAILABLE);
1027 memcpy(&rdev->cac_done_chandef, chandef,
1028 sizeof(struct cfg80211_chan_def));
1029 queue_work(cfg80211_wq, &rdev->propagate_cac_done_wk);
1030 cfg80211_sched_dfs_chan_update(rdev);
1031 fallthrough;
1032 case NL80211_RADAR_CAC_ABORTED:
1033 wdev->cac_started = false;
1034 break;
1035 case NL80211_RADAR_CAC_STARTED:
1036 wdev->cac_started = true;
1037 break;
1038 default:
1039 WARN_ON(1);
1040 return;
1041 }
1042
1043 nl80211_radar_notify(rdev, chandef, event, netdev, gfp);
1044}
1045EXPORT_SYMBOL(cfg80211_cac_event);
1046
1047static void
1048__cfg80211_background_cac_event(struct cfg80211_registered_device *rdev,
1049 struct wireless_dev *wdev,
1050 const struct cfg80211_chan_def *chandef,
1051 enum nl80211_radar_event event)
1052{
1053 struct wiphy *wiphy = &rdev->wiphy;
1054 struct net_device *netdev;
1055
1056 lockdep_assert_wiphy(&rdev->wiphy);
1057
1058 if (!cfg80211_chandef_valid(chandef))
1059 return;
1060
1061 if (!rdev->background_radar_wdev)
1062 return;
1063
1064 switch (event) {
1065 case NL80211_RADAR_CAC_FINISHED:
1066 cfg80211_set_dfs_state(wiphy, chandef, NL80211_DFS_AVAILABLE);
1067 memcpy(&rdev->cac_done_chandef, chandef, sizeof(*chandef));
1068 queue_work(cfg80211_wq, &rdev->propagate_cac_done_wk);
1069 cfg80211_sched_dfs_chan_update(rdev);
1070 wdev = rdev->background_radar_wdev;
1071 break;
1072 case NL80211_RADAR_CAC_ABORTED:
1073 if (!cancel_delayed_work(&rdev->background_cac_done_wk))
1074 return;
1075 wdev = rdev->background_radar_wdev;
1076 break;
1077 case NL80211_RADAR_CAC_STARTED:
1078 break;
1079 default:
1080 return;
1081 }
1082
1083 netdev = wdev ? wdev->netdev : NULL;
1084 nl80211_radar_notify(rdev, chandef, event, netdev, GFP_KERNEL);
1085}
1086
1087static void
1088cfg80211_background_cac_event(struct cfg80211_registered_device *rdev,
1089 const struct cfg80211_chan_def *chandef,
1090 enum nl80211_radar_event event)
1091{
1092 wiphy_lock(&rdev->wiphy);
1093 __cfg80211_background_cac_event(rdev, rdev->background_radar_wdev,
1094 chandef, event);
1095 wiphy_unlock(&rdev->wiphy);
1096}
1097
1098void cfg80211_background_cac_done_wk(struct work_struct *work)
1099{
1100 struct delayed_work *delayed_work = to_delayed_work(work);
1101 struct cfg80211_registered_device *rdev;
1102
1103 rdev = container_of(delayed_work, struct cfg80211_registered_device,
1104 background_cac_done_wk);
1105 cfg80211_background_cac_event(rdev, &rdev->background_radar_chandef,
1106 NL80211_RADAR_CAC_FINISHED);
1107}
1108
1109void cfg80211_background_cac_abort_wk(struct work_struct *work)
1110{
1111 struct cfg80211_registered_device *rdev;
1112
1113 rdev = container_of(work, struct cfg80211_registered_device,
1114 background_cac_abort_wk);
1115 cfg80211_background_cac_event(rdev, &rdev->background_radar_chandef,
1116 NL80211_RADAR_CAC_ABORTED);
1117}
1118
1119void cfg80211_background_cac_abort(struct wiphy *wiphy)
1120{
1121 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
1122
1123 queue_work(cfg80211_wq, &rdev->background_cac_abort_wk);
1124}
1125EXPORT_SYMBOL(cfg80211_background_cac_abort);
1126
1127int
1128cfg80211_start_background_radar_detection(struct cfg80211_registered_device *rdev,
1129 struct wireless_dev *wdev,
1130 struct cfg80211_chan_def *chandef)
1131{
1132 unsigned int cac_time_ms;
1133 int err;
1134
1135 lockdep_assert_wiphy(&rdev->wiphy);
1136
1137 if (!wiphy_ext_feature_isset(&rdev->wiphy,
1138 NL80211_EXT_FEATURE_RADAR_BACKGROUND))
1139 return -EOPNOTSUPP;
1140
1141 /* Offchannel chain already locked by another wdev */
1142 if (rdev->background_radar_wdev && rdev->background_radar_wdev != wdev)
1143 return -EBUSY;
1144
1145 /* CAC already in progress on the offchannel chain */
1146 if (rdev->background_radar_wdev == wdev &&
1147 delayed_work_pending(&rdev->background_cac_done_wk))
1148 return -EBUSY;
1149
1150 err = rdev_set_radar_background(rdev, chandef);
1151 if (err)
1152 return err;
1153
1154 cac_time_ms = cfg80211_chandef_dfs_cac_time(&rdev->wiphy, chandef);
1155 if (!cac_time_ms)
1156 cac_time_ms = IEEE80211_DFS_MIN_CAC_TIME_MS;
1157
1158 rdev->background_radar_chandef = *chandef;
1159 rdev->background_radar_wdev = wdev; /* Get offchain ownership */
1160
1161 __cfg80211_background_cac_event(rdev, wdev, chandef,
1162 NL80211_RADAR_CAC_STARTED);
1163 queue_delayed_work(cfg80211_wq, &rdev->background_cac_done_wk,
1164 msecs_to_jiffies(cac_time_ms));
1165
1166 return 0;
1167}
1168
1169void cfg80211_stop_background_radar_detection(struct wireless_dev *wdev)
1170{
1171 struct wiphy *wiphy = wdev->wiphy;
1172 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
1173
1174 lockdep_assert_wiphy(wiphy);
1175
1176 if (wdev != rdev->background_radar_wdev)
1177 return;
1178
1179 rdev_set_radar_background(rdev, NULL);
1180 rdev->background_radar_wdev = NULL; /* Release offchain ownership */
1181
1182 __cfg80211_background_cac_event(rdev, wdev,
1183 &rdev->background_radar_chandef,
1184 NL80211_RADAR_CAC_ABORTED);
1185}
1/*
2 * cfg80211 MLME SAP interface
3 *
4 * Copyright (c) 2009, Jouni Malinen <j@w1.fi>
5 */
6
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 * This is a bit of a hack, we don't notify userspace of
36 * a (re-)association reply if we tried to send a reassoc
37 * and got a reject -- we only try again with an assoc
38 * frame instead of reassoc.
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 /* update current_bss etc., consumes the bss reference */
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/* some MLME handling for userspace SME */
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/* Do a logical ht_capa &= ht_capa_mask. */
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/* Do a logical ht_capa &= ht_capa_mask. */
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 /* driver should have reported the disassoc */
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 cfg80211_mgmt_tx_params *params, u64 *cookie)
524{
525 const struct ieee80211_mgmt *mgmt;
526 u16 stype;
527
528 if (!wdev->wiphy->mgmt_stypes)
529 return -EOPNOTSUPP;
530
531 if (!rdev->ops->mgmt_tx)
532 return -EOPNOTSUPP;
533
534 if (params->len < 24 + 1)
535 return -EINVAL;
536
537 mgmt = (const struct ieee80211_mgmt *)params->buf;
538
539 if (!ieee80211_is_mgmt(mgmt->frame_control))
540 return -EINVAL;
541
542 stype = le16_to_cpu(mgmt->frame_control) & IEEE80211_FCTL_STYPE;
543 if (!(wdev->wiphy->mgmt_stypes[wdev->iftype].tx & BIT(stype >> 4)))
544 return -EINVAL;
545
546 if (ieee80211_is_action(mgmt->frame_control) &&
547 mgmt->u.action.category != WLAN_CATEGORY_PUBLIC) {
548 int err = 0;
549
550 wdev_lock(wdev);
551
552 switch (wdev->iftype) {
553 case NL80211_IFTYPE_ADHOC:
554 case NL80211_IFTYPE_STATION:
555 case NL80211_IFTYPE_P2P_CLIENT:
556 if (!wdev->current_bss) {
557 err = -ENOTCONN;
558 break;
559 }
560
561 if (!ether_addr_equal(wdev->current_bss->pub.bssid,
562 mgmt->bssid)) {
563 err = -ENOTCONN;
564 break;
565 }
566
567 /*
568 * check for IBSS DA must be done by driver as
569 * cfg80211 doesn't track the stations
570 */
571 if (wdev->iftype == NL80211_IFTYPE_ADHOC)
572 break;
573
574 /* for station, check that DA is the AP */
575 if (!ether_addr_equal(wdev->current_bss->pub.bssid,
576 mgmt->da)) {
577 err = -ENOTCONN;
578 break;
579 }
580 break;
581 case NL80211_IFTYPE_AP:
582 case NL80211_IFTYPE_P2P_GO:
583 case NL80211_IFTYPE_AP_VLAN:
584 if (!ether_addr_equal(mgmt->bssid, wdev_address(wdev)))
585 err = -EINVAL;
586 break;
587 case NL80211_IFTYPE_MESH_POINT:
588 if (!ether_addr_equal(mgmt->sa, mgmt->bssid)) {
589 err = -EINVAL;
590 break;
591 }
592 /*
593 * check for mesh DA must be done by driver as
594 * cfg80211 doesn't track the stations
595 */
596 break;
597 case NL80211_IFTYPE_P2P_DEVICE:
598 /*
599 * fall through, P2P device only supports
600 * public action frames
601 */
602 default:
603 err = -EOPNOTSUPP;
604 break;
605 }
606 wdev_unlock(wdev);
607
608 if (err)
609 return err;
610 }
611
612 if (!ether_addr_equal(mgmt->sa, wdev_address(wdev)))
613 return -EINVAL;
614
615 /* Transmit the Action frame as requested by user space */
616 return rdev_mgmt_tx(rdev, wdev, params, cookie);
617}
618
619bool cfg80211_rx_mgmt(struct wireless_dev *wdev, int freq, int sig_mbm,
620 const u8 *buf, size_t len, u32 flags, gfp_t gfp)
621{
622 struct wiphy *wiphy = wdev->wiphy;
623 struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
624 struct cfg80211_mgmt_registration *reg;
625 const struct ieee80211_txrx_stypes *stypes =
626 &wiphy->mgmt_stypes[wdev->iftype];
627 struct ieee80211_mgmt *mgmt = (void *)buf;
628 const u8 *data;
629 int data_len;
630 bool result = false;
631 __le16 ftype = mgmt->frame_control &
632 cpu_to_le16(IEEE80211_FCTL_FTYPE | IEEE80211_FCTL_STYPE);
633 u16 stype;
634
635 trace_cfg80211_rx_mgmt(wdev, freq, sig_mbm);
636 stype = (le16_to_cpu(mgmt->frame_control) & IEEE80211_FCTL_STYPE) >> 4;
637
638 if (!(stypes->rx & BIT(stype))) {
639 trace_cfg80211_return_bool(false);
640 return false;
641 }
642
643 data = buf + ieee80211_hdrlen(mgmt->frame_control);
644 data_len = len - ieee80211_hdrlen(mgmt->frame_control);
645
646 spin_lock_bh(&wdev->mgmt_registrations_lock);
647
648 list_for_each_entry(reg, &wdev->mgmt_registrations, list) {
649 if (reg->frame_type != ftype)
650 continue;
651
652 if (reg->match_len > data_len)
653 continue;
654
655 if (memcmp(reg->match, data, reg->match_len))
656 continue;
657
658 /* found match! */
659
660 /* Indicate the received Action frame to user space */
661 if (nl80211_send_mgmt(rdev, wdev, reg->nlportid,
662 freq, sig_mbm,
663 buf, len, flags, gfp))
664 continue;
665
666 result = true;
667 break;
668 }
669
670 spin_unlock_bh(&wdev->mgmt_registrations_lock);
671
672 trace_cfg80211_return_bool(result);
673 return result;
674}
675EXPORT_SYMBOL(cfg80211_rx_mgmt);
676
677void cfg80211_dfs_channels_update_work(struct work_struct *work)
678{
679 struct delayed_work *delayed_work;
680 struct cfg80211_registered_device *rdev;
681 struct cfg80211_chan_def chandef;
682 struct ieee80211_supported_band *sband;
683 struct ieee80211_channel *c;
684 struct wiphy *wiphy;
685 bool check_again = false;
686 unsigned long timeout, next_time = 0;
687 int bandid, i;
688
689 delayed_work = container_of(work, struct delayed_work, work);
690 rdev = container_of(delayed_work, struct cfg80211_registered_device,
691 dfs_update_channels_wk);
692 wiphy = &rdev->wiphy;
693
694 rtnl_lock();
695 for (bandid = 0; bandid < IEEE80211_NUM_BANDS; bandid++) {
696 sband = wiphy->bands[bandid];
697 if (!sband)
698 continue;
699
700 for (i = 0; i < sband->n_channels; i++) {
701 c = &sband->channels[i];
702
703 if (c->dfs_state != NL80211_DFS_UNAVAILABLE)
704 continue;
705
706 timeout = c->dfs_state_entered + msecs_to_jiffies(
707 IEEE80211_DFS_MIN_NOP_TIME_MS);
708
709 if (time_after_eq(jiffies, timeout)) {
710 c->dfs_state = NL80211_DFS_USABLE;
711 c->dfs_state_entered = jiffies;
712
713 cfg80211_chandef_create(&chandef, c,
714 NL80211_CHAN_NO_HT);
715
716 nl80211_radar_notify(rdev, &chandef,
717 NL80211_RADAR_NOP_FINISHED,
718 NULL, GFP_ATOMIC);
719 continue;
720 }
721
722 if (!check_again)
723 next_time = timeout - jiffies;
724 else
725 next_time = min(next_time, timeout - jiffies);
726 check_again = true;
727 }
728 }
729 rtnl_unlock();
730
731 /* reschedule if there are other channels waiting to be cleared again */
732 if (check_again)
733 queue_delayed_work(cfg80211_wq, &rdev->dfs_update_channels_wk,
734 next_time);
735}
736
737
738void cfg80211_radar_event(struct wiphy *wiphy,
739 struct cfg80211_chan_def *chandef,
740 gfp_t gfp)
741{
742 struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
743 unsigned long timeout;
744
745 trace_cfg80211_radar_event(wiphy, chandef);
746
747 /* only set the chandef supplied channel to unavailable, in
748 * case the radar is detected on only one of multiple channels
749 * spanned by the chandef.
750 */
751 cfg80211_set_dfs_state(wiphy, chandef, NL80211_DFS_UNAVAILABLE);
752
753 timeout = msecs_to_jiffies(IEEE80211_DFS_MIN_NOP_TIME_MS);
754 queue_delayed_work(cfg80211_wq, &rdev->dfs_update_channels_wk,
755 timeout);
756
757 nl80211_radar_notify(rdev, chandef, NL80211_RADAR_DETECTED, NULL, gfp);
758}
759EXPORT_SYMBOL(cfg80211_radar_event);
760
761void cfg80211_cac_event(struct net_device *netdev,
762 const struct cfg80211_chan_def *chandef,
763 enum nl80211_radar_event event, gfp_t gfp)
764{
765 struct wireless_dev *wdev = netdev->ieee80211_ptr;
766 struct wiphy *wiphy = wdev->wiphy;
767 struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
768 unsigned long timeout;
769
770 trace_cfg80211_cac_event(netdev, event);
771
772 if (WARN_ON(!wdev->cac_started))
773 return;
774
775 if (WARN_ON(!wdev->chandef.chan))
776 return;
777
778 switch (event) {
779 case NL80211_RADAR_CAC_FINISHED:
780 timeout = wdev->cac_start_time +
781 msecs_to_jiffies(wdev->cac_time_ms);
782 WARN_ON(!time_after_eq(jiffies, timeout));
783 cfg80211_set_dfs_state(wiphy, chandef, NL80211_DFS_AVAILABLE);
784 break;
785 case NL80211_RADAR_CAC_ABORTED:
786 break;
787 default:
788 WARN_ON(1);
789 return;
790 }
791 wdev->cac_started = false;
792
793 nl80211_radar_notify(rdev, chandef, event, netdev, gfp);
794}
795EXPORT_SYMBOL(cfg80211_cac_event);