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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, 2022-2024 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 memset(&wrqu, 0, sizeof(wrqu));
245 wrqu.data.length =
246 sprintf(buf, "MLME-MICHAELMICFAILURE."
247 "indication(keyid=%d %scast addr=%pM)",
248 key_id, key_type == NL80211_KEYTYPE_GROUP
249 ? "broad" : "uni", addr);
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
328static int
329cfg80211_mlme_check_mlo_compat(const struct ieee80211_multi_link_elem *mle_a,
330 const struct ieee80211_multi_link_elem *mle_b,
331 struct netlink_ext_ack *extack)
332{
333 const struct ieee80211_mle_basic_common_info *common_a, *common_b;
334
335 common_a = (const void *)mle_a->variable;
336 common_b = (const void *)mle_b->variable;
337
338 if (memcmp(common_a->mld_mac_addr, common_b->mld_mac_addr, ETH_ALEN)) {
339 NL_SET_ERR_MSG(extack, "AP MLD address mismatch");
340 return -EINVAL;
341 }
342
343 if (ieee80211_mle_get_eml_med_sync_delay((const u8 *)mle_a) !=
344 ieee80211_mle_get_eml_med_sync_delay((const u8 *)mle_b)) {
345 NL_SET_ERR_MSG(extack, "link EML medium sync delay mismatch");
346 return -EINVAL;
347 }
348
349 if (ieee80211_mle_get_eml_cap((const u8 *)mle_a) !=
350 ieee80211_mle_get_eml_cap((const u8 *)mle_b)) {
351 NL_SET_ERR_MSG(extack, "link EML capabilities mismatch");
352 return -EINVAL;
353 }
354
355 if (ieee80211_mle_get_mld_capa_op((const u8 *)mle_a) !=
356 ieee80211_mle_get_mld_capa_op((const u8 *)mle_b)) {
357 NL_SET_ERR_MSG(extack, "link MLD capabilities/ops mismatch");
358 return -EINVAL;
359 }
360
361 return 0;
362}
363
364static int cfg80211_mlme_check_mlo(struct net_device *dev,
365 struct cfg80211_assoc_request *req,
366 struct netlink_ext_ack *extack)
367{
368 const struct ieee80211_multi_link_elem *mles[ARRAY_SIZE(req->links)] = {};
369 int i;
370
371 if (req->link_id < 0)
372 return 0;
373
374 if (!req->links[req->link_id].bss) {
375 NL_SET_ERR_MSG(extack, "no BSS for assoc link");
376 return -EINVAL;
377 }
378
379 rcu_read_lock();
380 for (i = 0; i < ARRAY_SIZE(req->links); i++) {
381 const struct cfg80211_bss_ies *ies;
382 const struct element *ml;
383
384 if (!req->links[i].bss)
385 continue;
386
387 if (ether_addr_equal(req->links[i].bss->bssid, dev->dev_addr)) {
388 NL_SET_ERR_MSG(extack, "BSSID must not be our address");
389 req->links[i].error = -EINVAL;
390 goto error;
391 }
392
393 ies = rcu_dereference(req->links[i].bss->ies);
394 ml = cfg80211_find_ext_elem(WLAN_EID_EXT_EHT_MULTI_LINK,
395 ies->data, ies->len);
396 if (!ml) {
397 NL_SET_ERR_MSG(extack, "MLO BSS w/o ML element");
398 req->links[i].error = -EINVAL;
399 goto error;
400 }
401
402 if (!ieee80211_mle_type_ok(ml->data + 1,
403 IEEE80211_ML_CONTROL_TYPE_BASIC,
404 ml->datalen - 1)) {
405 NL_SET_ERR_MSG(extack, "BSS with invalid ML element");
406 req->links[i].error = -EINVAL;
407 goto error;
408 }
409
410 mles[i] = (const void *)(ml->data + 1);
411
412 if (ieee80211_mle_get_link_id((const u8 *)mles[i]) != i) {
413 NL_SET_ERR_MSG(extack, "link ID mismatch");
414 req->links[i].error = -EINVAL;
415 goto error;
416 }
417 }
418
419 if (WARN_ON(!mles[req->link_id]))
420 goto error;
421
422 for (i = 0; i < ARRAY_SIZE(req->links); i++) {
423 if (i == req->link_id || !req->links[i].bss)
424 continue;
425
426 if (WARN_ON(!mles[i]))
427 goto error;
428
429 if (cfg80211_mlme_check_mlo_compat(mles[req->link_id], mles[i],
430 extack)) {
431 req->links[i].error = -EINVAL;
432 goto error;
433 }
434 }
435
436 rcu_read_unlock();
437 return 0;
438error:
439 rcu_read_unlock();
440 return -EINVAL;
441}
442
443/* Note: caller must cfg80211_put_bss() regardless of result */
444int cfg80211_mlme_assoc(struct cfg80211_registered_device *rdev,
445 struct net_device *dev,
446 struct cfg80211_assoc_request *req,
447 struct netlink_ext_ack *extack)
448{
449 struct wireless_dev *wdev = dev->ieee80211_ptr;
450 int err;
451
452 lockdep_assert_wiphy(wdev->wiphy);
453
454 err = cfg80211_mlme_check_mlo(dev, req, extack);
455 if (err)
456 return err;
457
458 if (wdev->connected &&
459 (!req->prev_bssid ||
460 !ether_addr_equal(wdev->u.client.connected_addr, req->prev_bssid)))
461 return -EALREADY;
462
463 if ((req->bss && ether_addr_equal(req->bss->bssid, dev->dev_addr)) ||
464 (req->link_id >= 0 &&
465 ether_addr_equal(req->ap_mld_addr, dev->dev_addr)))
466 return -EINVAL;
467
468 cfg80211_oper_and_ht_capa(&req->ht_capa_mask,
469 rdev->wiphy.ht_capa_mod_mask);
470 cfg80211_oper_and_vht_capa(&req->vht_capa_mask,
471 rdev->wiphy.vht_capa_mod_mask);
472
473 err = rdev_assoc(rdev, dev, req);
474 if (!err) {
475 int link_id;
476
477 if (req->bss) {
478 cfg80211_ref_bss(&rdev->wiphy, req->bss);
479 cfg80211_hold_bss(bss_from_pub(req->bss));
480 }
481
482 for (link_id = 0; link_id < ARRAY_SIZE(req->links); link_id++) {
483 if (!req->links[link_id].bss)
484 continue;
485 cfg80211_ref_bss(&rdev->wiphy, req->links[link_id].bss);
486 cfg80211_hold_bss(bss_from_pub(req->links[link_id].bss));
487 }
488 }
489 return err;
490}
491
492int cfg80211_mlme_deauth(struct cfg80211_registered_device *rdev,
493 struct net_device *dev, const u8 *bssid,
494 const u8 *ie, int ie_len, u16 reason,
495 bool local_state_change)
496{
497 struct wireless_dev *wdev = dev->ieee80211_ptr;
498 struct cfg80211_deauth_request req = {
499 .bssid = bssid,
500 .reason_code = reason,
501 .ie = ie,
502 .ie_len = ie_len,
503 .local_state_change = local_state_change,
504 };
505
506 lockdep_assert_wiphy(wdev->wiphy);
507
508 if (local_state_change &&
509 (!wdev->connected ||
510 !ether_addr_equal(wdev->u.client.connected_addr, bssid)))
511 return 0;
512
513 if (ether_addr_equal(wdev->disconnect_bssid, bssid) ||
514 (wdev->connected &&
515 ether_addr_equal(wdev->u.client.connected_addr, bssid)))
516 wdev->conn_owner_nlportid = 0;
517
518 return rdev_deauth(rdev, dev, &req);
519}
520
521int cfg80211_mlme_disassoc(struct cfg80211_registered_device *rdev,
522 struct net_device *dev, const u8 *ap_addr,
523 const u8 *ie, int ie_len, u16 reason,
524 bool local_state_change)
525{
526 struct wireless_dev *wdev = dev->ieee80211_ptr;
527 struct cfg80211_disassoc_request req = {
528 .reason_code = reason,
529 .local_state_change = local_state_change,
530 .ie = ie,
531 .ie_len = ie_len,
532 .ap_addr = ap_addr,
533 };
534 int err;
535
536 lockdep_assert_wiphy(wdev->wiphy);
537
538 if (!wdev->connected)
539 return -ENOTCONN;
540
541 if (memcmp(wdev->u.client.connected_addr, ap_addr, ETH_ALEN))
542 return -ENOTCONN;
543
544 err = rdev_disassoc(rdev, dev, &req);
545 if (err)
546 return err;
547
548 /* driver should have reported the disassoc */
549 WARN_ON(wdev->connected);
550 return 0;
551}
552
553void cfg80211_mlme_down(struct cfg80211_registered_device *rdev,
554 struct net_device *dev)
555{
556 struct wireless_dev *wdev = dev->ieee80211_ptr;
557 u8 bssid[ETH_ALEN];
558
559 lockdep_assert_wiphy(wdev->wiphy);
560
561 if (!rdev->ops->deauth)
562 return;
563
564 if (!wdev->connected)
565 return;
566
567 memcpy(bssid, wdev->u.client.connected_addr, ETH_ALEN);
568 cfg80211_mlme_deauth(rdev, dev, bssid, NULL, 0,
569 WLAN_REASON_DEAUTH_LEAVING, false);
570}
571
572struct cfg80211_mgmt_registration {
573 struct list_head list;
574 struct wireless_dev *wdev;
575
576 u32 nlportid;
577
578 int match_len;
579
580 __le16 frame_type;
581
582 bool multicast_rx;
583
584 u8 match[];
585};
586
587static void cfg80211_mgmt_registrations_update(struct wireless_dev *wdev)
588{
589 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
590 struct wireless_dev *tmp;
591 struct cfg80211_mgmt_registration *reg;
592 struct mgmt_frame_regs upd = {};
593
594 lockdep_assert_held(&rdev->wiphy.mtx);
595
596 spin_lock_bh(&rdev->mgmt_registrations_lock);
597 if (!wdev->mgmt_registrations_need_update) {
598 spin_unlock_bh(&rdev->mgmt_registrations_lock);
599 return;
600 }
601
602 rcu_read_lock();
603 list_for_each_entry_rcu(tmp, &rdev->wiphy.wdev_list, list) {
604 list_for_each_entry(reg, &tmp->mgmt_registrations, list) {
605 u32 mask = BIT(le16_to_cpu(reg->frame_type) >> 4);
606 u32 mcast_mask = 0;
607
608 if (reg->multicast_rx)
609 mcast_mask = mask;
610
611 upd.global_stypes |= mask;
612 upd.global_mcast_stypes |= mcast_mask;
613
614 if (tmp == wdev) {
615 upd.interface_stypes |= mask;
616 upd.interface_mcast_stypes |= mcast_mask;
617 }
618 }
619 }
620 rcu_read_unlock();
621
622 wdev->mgmt_registrations_need_update = 0;
623 spin_unlock_bh(&rdev->mgmt_registrations_lock);
624
625 rdev_update_mgmt_frame_registrations(rdev, wdev, &upd);
626}
627
628void cfg80211_mgmt_registrations_update_wk(struct work_struct *wk)
629{
630 struct cfg80211_registered_device *rdev;
631 struct wireless_dev *wdev;
632
633 rdev = container_of(wk, struct cfg80211_registered_device,
634 mgmt_registrations_update_wk);
635
636 wiphy_lock(&rdev->wiphy);
637 list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list)
638 cfg80211_mgmt_registrations_update(wdev);
639 wiphy_unlock(&rdev->wiphy);
640}
641
642int cfg80211_mlme_register_mgmt(struct wireless_dev *wdev, u32 snd_portid,
643 u16 frame_type, const u8 *match_data,
644 int match_len, bool multicast_rx,
645 struct netlink_ext_ack *extack)
646{
647 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
648 struct cfg80211_mgmt_registration *reg, *nreg;
649 int err = 0;
650 u16 mgmt_type;
651 bool update_multicast = false;
652
653 if (!wdev->wiphy->mgmt_stypes)
654 return -EOPNOTSUPP;
655
656 if ((frame_type & IEEE80211_FCTL_FTYPE) != IEEE80211_FTYPE_MGMT) {
657 NL_SET_ERR_MSG(extack, "frame type not management");
658 return -EINVAL;
659 }
660
661 if (frame_type & ~(IEEE80211_FCTL_FTYPE | IEEE80211_FCTL_STYPE)) {
662 NL_SET_ERR_MSG(extack, "Invalid frame type");
663 return -EINVAL;
664 }
665
666 mgmt_type = (frame_type & IEEE80211_FCTL_STYPE) >> 4;
667 if (!(wdev->wiphy->mgmt_stypes[wdev->iftype].rx & BIT(mgmt_type))) {
668 NL_SET_ERR_MSG(extack,
669 "Registration to specific type not supported");
670 return -EINVAL;
671 }
672
673 /*
674 * To support Pre Association Security Negotiation (PASN), registration
675 * for authentication frames should be supported. However, as some
676 * versions of the user space daemons wrongly register to all types of
677 * authentication frames (which might result in unexpected behavior)
678 * allow such registration if the request is for a specific
679 * authentication algorithm number.
680 */
681 if (wdev->iftype == NL80211_IFTYPE_STATION &&
682 (frame_type & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_AUTH &&
683 !(match_data && match_len >= 2)) {
684 NL_SET_ERR_MSG(extack,
685 "Authentication algorithm number required");
686 return -EINVAL;
687 }
688
689 nreg = kzalloc(sizeof(*reg) + match_len, GFP_KERNEL);
690 if (!nreg)
691 return -ENOMEM;
692
693 spin_lock_bh(&rdev->mgmt_registrations_lock);
694
695 list_for_each_entry(reg, &wdev->mgmt_registrations, list) {
696 int mlen = min(match_len, reg->match_len);
697
698 if (frame_type != le16_to_cpu(reg->frame_type))
699 continue;
700
701 if (memcmp(reg->match, match_data, mlen) == 0) {
702 if (reg->multicast_rx != multicast_rx) {
703 update_multicast = true;
704 reg->multicast_rx = multicast_rx;
705 break;
706 }
707 NL_SET_ERR_MSG(extack, "Match already configured");
708 err = -EALREADY;
709 break;
710 }
711 }
712
713 if (err)
714 goto out;
715
716 if (update_multicast) {
717 kfree(nreg);
718 } else {
719 memcpy(nreg->match, match_data, match_len);
720 nreg->match_len = match_len;
721 nreg->nlportid = snd_portid;
722 nreg->frame_type = cpu_to_le16(frame_type);
723 nreg->wdev = wdev;
724 nreg->multicast_rx = multicast_rx;
725 list_add(&nreg->list, &wdev->mgmt_registrations);
726 }
727 wdev->mgmt_registrations_need_update = 1;
728 spin_unlock_bh(&rdev->mgmt_registrations_lock);
729
730 cfg80211_mgmt_registrations_update(wdev);
731
732 return 0;
733
734 out:
735 kfree(nreg);
736 spin_unlock_bh(&rdev->mgmt_registrations_lock);
737
738 return err;
739}
740
741void cfg80211_mlme_unregister_socket(struct wireless_dev *wdev, u32 nlportid)
742{
743 struct wiphy *wiphy = wdev->wiphy;
744 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
745 struct cfg80211_mgmt_registration *reg, *tmp;
746
747 spin_lock_bh(&rdev->mgmt_registrations_lock);
748
749 list_for_each_entry_safe(reg, tmp, &wdev->mgmt_registrations, list) {
750 if (reg->nlportid != nlportid)
751 continue;
752
753 list_del(®->list);
754 kfree(reg);
755
756 wdev->mgmt_registrations_need_update = 1;
757 schedule_work(&rdev->mgmt_registrations_update_wk);
758 }
759
760 spin_unlock_bh(&rdev->mgmt_registrations_lock);
761
762 if (nlportid && rdev->crit_proto_nlportid == nlportid) {
763 rdev->crit_proto_nlportid = 0;
764 rdev_crit_proto_stop(rdev, wdev);
765 }
766
767 if (nlportid == wdev->ap_unexpected_nlportid)
768 wdev->ap_unexpected_nlportid = 0;
769}
770
771void cfg80211_mlme_purge_registrations(struct wireless_dev *wdev)
772{
773 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
774 struct cfg80211_mgmt_registration *reg, *tmp;
775
776 spin_lock_bh(&rdev->mgmt_registrations_lock);
777 list_for_each_entry_safe(reg, tmp, &wdev->mgmt_registrations, list) {
778 list_del(®->list);
779 kfree(reg);
780 }
781 wdev->mgmt_registrations_need_update = 1;
782 spin_unlock_bh(&rdev->mgmt_registrations_lock);
783
784 cfg80211_mgmt_registrations_update(wdev);
785}
786
787static bool cfg80211_allowed_address(struct wireless_dev *wdev, const u8 *addr)
788{
789 int i;
790
791 for_each_valid_link(wdev, i) {
792 if (ether_addr_equal(addr, wdev->links[i].addr))
793 return true;
794 }
795
796 return ether_addr_equal(addr, wdev_address(wdev));
797}
798
799static bool cfg80211_allowed_random_address(struct wireless_dev *wdev,
800 const struct ieee80211_mgmt *mgmt)
801{
802 if (ieee80211_is_auth(mgmt->frame_control) ||
803 ieee80211_is_deauth(mgmt->frame_control)) {
804 /* Allow random TA to be used with authentication and
805 * deauthentication frames if the driver has indicated support.
806 */
807 if (wiphy_ext_feature_isset(
808 wdev->wiphy,
809 NL80211_EXT_FEATURE_AUTH_AND_DEAUTH_RANDOM_TA))
810 return true;
811 } else if (ieee80211_is_action(mgmt->frame_control) &&
812 mgmt->u.action.category == WLAN_CATEGORY_PUBLIC) {
813 /* Allow random TA to be used with Public Action frames if the
814 * driver has indicated support.
815 */
816 if (!wdev->connected &&
817 wiphy_ext_feature_isset(
818 wdev->wiphy,
819 NL80211_EXT_FEATURE_MGMT_TX_RANDOM_TA))
820 return true;
821
822 if (wdev->connected &&
823 wiphy_ext_feature_isset(
824 wdev->wiphy,
825 NL80211_EXT_FEATURE_MGMT_TX_RANDOM_TA_CONNECTED))
826 return true;
827 }
828
829 return false;
830}
831
832int cfg80211_mlme_mgmt_tx(struct cfg80211_registered_device *rdev,
833 struct wireless_dev *wdev,
834 struct cfg80211_mgmt_tx_params *params, u64 *cookie)
835{
836 const struct ieee80211_mgmt *mgmt;
837 u16 stype;
838
839 lockdep_assert_wiphy(&rdev->wiphy);
840
841 if (!wdev->wiphy->mgmt_stypes)
842 return -EOPNOTSUPP;
843
844 if (!rdev->ops->mgmt_tx)
845 return -EOPNOTSUPP;
846
847 if (params->len < 24 + 1)
848 return -EINVAL;
849
850 mgmt = (const struct ieee80211_mgmt *)params->buf;
851
852 if (!ieee80211_is_mgmt(mgmt->frame_control))
853 return -EINVAL;
854
855 stype = le16_to_cpu(mgmt->frame_control) & IEEE80211_FCTL_STYPE;
856 if (!(wdev->wiphy->mgmt_stypes[wdev->iftype].tx & BIT(stype >> 4)))
857 return -EINVAL;
858
859 if (ieee80211_is_action(mgmt->frame_control) &&
860 mgmt->u.action.category != WLAN_CATEGORY_PUBLIC) {
861 int err = 0;
862
863 switch (wdev->iftype) {
864 case NL80211_IFTYPE_ADHOC:
865 /*
866 * check for IBSS DA must be done by driver as
867 * cfg80211 doesn't track the stations
868 */
869 if (!wdev->u.ibss.current_bss ||
870 !ether_addr_equal(wdev->u.ibss.current_bss->pub.bssid,
871 mgmt->bssid)) {
872 err = -ENOTCONN;
873 break;
874 }
875 break;
876 case NL80211_IFTYPE_STATION:
877 case NL80211_IFTYPE_P2P_CLIENT:
878 if (!wdev->connected) {
879 err = -ENOTCONN;
880 break;
881 }
882
883 /* FIXME: MLD may address this differently */
884
885 if (!ether_addr_equal(wdev->u.client.connected_addr,
886 mgmt->bssid)) {
887 err = -ENOTCONN;
888 break;
889 }
890
891 /* for station, check that DA is the AP */
892 if (!ether_addr_equal(wdev->u.client.connected_addr,
893 mgmt->da)) {
894 err = -ENOTCONN;
895 break;
896 }
897 break;
898 case NL80211_IFTYPE_AP:
899 case NL80211_IFTYPE_P2P_GO:
900 case NL80211_IFTYPE_AP_VLAN:
901 if (!ether_addr_equal(mgmt->bssid, wdev_address(wdev)) &&
902 (params->link_id < 0 ||
903 !ether_addr_equal(mgmt->bssid,
904 wdev->links[params->link_id].addr)))
905 err = -EINVAL;
906 break;
907 case NL80211_IFTYPE_MESH_POINT:
908 if (!ether_addr_equal(mgmt->sa, mgmt->bssid)) {
909 err = -EINVAL;
910 break;
911 }
912 /*
913 * check for mesh DA must be done by driver as
914 * cfg80211 doesn't track the stations
915 */
916 break;
917 case NL80211_IFTYPE_P2P_DEVICE:
918 /*
919 * fall through, P2P device only supports
920 * public action frames
921 */
922 case NL80211_IFTYPE_NAN:
923 default:
924 err = -EOPNOTSUPP;
925 break;
926 }
927
928 if (err)
929 return err;
930 }
931
932 if (!cfg80211_allowed_address(wdev, mgmt->sa) &&
933 !cfg80211_allowed_random_address(wdev, mgmt))
934 return -EINVAL;
935
936 /* Transmit the management frame as requested by user space */
937 return rdev_mgmt_tx(rdev, wdev, params, cookie);
938}
939
940bool cfg80211_rx_mgmt_ext(struct wireless_dev *wdev,
941 struct cfg80211_rx_info *info)
942{
943 struct wiphy *wiphy = wdev->wiphy;
944 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
945 struct cfg80211_mgmt_registration *reg;
946 const struct ieee80211_txrx_stypes *stypes =
947 &wiphy->mgmt_stypes[wdev->iftype];
948 struct ieee80211_mgmt *mgmt = (void *)info->buf;
949 const u8 *data;
950 int data_len;
951 bool result = false;
952 __le16 ftype = mgmt->frame_control &
953 cpu_to_le16(IEEE80211_FCTL_FTYPE | IEEE80211_FCTL_STYPE);
954 u16 stype;
955
956 trace_cfg80211_rx_mgmt(wdev, info);
957 stype = (le16_to_cpu(mgmt->frame_control) & IEEE80211_FCTL_STYPE) >> 4;
958
959 if (!(stypes->rx & BIT(stype))) {
960 trace_cfg80211_return_bool(false);
961 return false;
962 }
963
964 data = info->buf + ieee80211_hdrlen(mgmt->frame_control);
965 data_len = info->len - ieee80211_hdrlen(mgmt->frame_control);
966
967 spin_lock_bh(&rdev->mgmt_registrations_lock);
968
969 list_for_each_entry(reg, &wdev->mgmt_registrations, list) {
970 if (reg->frame_type != ftype)
971 continue;
972
973 if (reg->match_len > data_len)
974 continue;
975
976 if (memcmp(reg->match, data, reg->match_len))
977 continue;
978
979 /* found match! */
980
981 /* Indicate the received Action frame to user space */
982 if (nl80211_send_mgmt(rdev, wdev, reg->nlportid, info,
983 GFP_ATOMIC))
984 continue;
985
986 result = true;
987 break;
988 }
989
990 spin_unlock_bh(&rdev->mgmt_registrations_lock);
991
992 trace_cfg80211_return_bool(result);
993 return result;
994}
995EXPORT_SYMBOL(cfg80211_rx_mgmt_ext);
996
997void cfg80211_sched_dfs_chan_update(struct cfg80211_registered_device *rdev)
998{
999 cancel_delayed_work(&rdev->dfs_update_channels_wk);
1000 queue_delayed_work(cfg80211_wq, &rdev->dfs_update_channels_wk, 0);
1001}
1002
1003void cfg80211_dfs_channels_update_work(struct work_struct *work)
1004{
1005 struct delayed_work *delayed_work = to_delayed_work(work);
1006 struct cfg80211_registered_device *rdev;
1007 struct cfg80211_chan_def chandef;
1008 struct ieee80211_supported_band *sband;
1009 struct ieee80211_channel *c;
1010 struct wiphy *wiphy;
1011 bool check_again = false;
1012 unsigned long timeout, next_time = 0;
1013 unsigned long time_dfs_update;
1014 enum nl80211_radar_event radar_event;
1015 int bandid, i;
1016
1017 rdev = container_of(delayed_work, struct cfg80211_registered_device,
1018 dfs_update_channels_wk);
1019 wiphy = &rdev->wiphy;
1020
1021 rtnl_lock();
1022 for (bandid = 0; bandid < NUM_NL80211_BANDS; bandid++) {
1023 sband = wiphy->bands[bandid];
1024 if (!sband)
1025 continue;
1026
1027 for (i = 0; i < sband->n_channels; i++) {
1028 c = &sband->channels[i];
1029
1030 if (!(c->flags & IEEE80211_CHAN_RADAR))
1031 continue;
1032
1033 if (c->dfs_state != NL80211_DFS_UNAVAILABLE &&
1034 c->dfs_state != NL80211_DFS_AVAILABLE)
1035 continue;
1036
1037 if (c->dfs_state == NL80211_DFS_UNAVAILABLE) {
1038 time_dfs_update = IEEE80211_DFS_MIN_NOP_TIME_MS;
1039 radar_event = NL80211_RADAR_NOP_FINISHED;
1040 } else {
1041 if (regulatory_pre_cac_allowed(wiphy) ||
1042 cfg80211_any_wiphy_oper_chan(wiphy, c))
1043 continue;
1044
1045 time_dfs_update = REG_PRE_CAC_EXPIRY_GRACE_MS;
1046 radar_event = NL80211_RADAR_PRE_CAC_EXPIRED;
1047 }
1048
1049 timeout = c->dfs_state_entered +
1050 msecs_to_jiffies(time_dfs_update);
1051
1052 if (time_after_eq(jiffies, timeout)) {
1053 c->dfs_state = NL80211_DFS_USABLE;
1054 c->dfs_state_entered = jiffies;
1055
1056 cfg80211_chandef_create(&chandef, c,
1057 NL80211_CHAN_NO_HT);
1058
1059 nl80211_radar_notify(rdev, &chandef,
1060 radar_event, NULL,
1061 GFP_ATOMIC);
1062
1063 regulatory_propagate_dfs_state(wiphy, &chandef,
1064 c->dfs_state,
1065 radar_event);
1066 continue;
1067 }
1068
1069 if (!check_again)
1070 next_time = timeout - jiffies;
1071 else
1072 next_time = min(next_time, timeout - jiffies);
1073 check_again = true;
1074 }
1075 }
1076 rtnl_unlock();
1077
1078 /* reschedule if there are other channels waiting to be cleared again */
1079 if (check_again)
1080 queue_delayed_work(cfg80211_wq, &rdev->dfs_update_channels_wk,
1081 next_time);
1082}
1083
1084
1085void __cfg80211_radar_event(struct wiphy *wiphy,
1086 struct cfg80211_chan_def *chandef,
1087 bool offchan, gfp_t gfp)
1088{
1089 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
1090
1091 trace_cfg80211_radar_event(wiphy, chandef, offchan);
1092
1093 /* only set the chandef supplied channel to unavailable, in
1094 * case the radar is detected on only one of multiple channels
1095 * spanned by the chandef.
1096 */
1097 cfg80211_set_dfs_state(wiphy, chandef, NL80211_DFS_UNAVAILABLE);
1098
1099 if (offchan)
1100 queue_work(cfg80211_wq, &rdev->background_cac_abort_wk);
1101
1102 cfg80211_sched_dfs_chan_update(rdev);
1103
1104 nl80211_radar_notify(rdev, chandef, NL80211_RADAR_DETECTED, NULL, gfp);
1105
1106 memcpy(&rdev->radar_chandef, chandef, sizeof(struct cfg80211_chan_def));
1107 queue_work(cfg80211_wq, &rdev->propagate_radar_detect_wk);
1108}
1109EXPORT_SYMBOL(__cfg80211_radar_event);
1110
1111void cfg80211_cac_event(struct net_device *netdev,
1112 const struct cfg80211_chan_def *chandef,
1113 enum nl80211_radar_event event, gfp_t gfp)
1114{
1115 struct wireless_dev *wdev = netdev->ieee80211_ptr;
1116 struct wiphy *wiphy = wdev->wiphy;
1117 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
1118 unsigned long timeout;
1119
1120 /* not yet supported */
1121 if (wdev->valid_links)
1122 return;
1123
1124 trace_cfg80211_cac_event(netdev, event);
1125
1126 if (WARN_ON(!wdev->cac_started && event != NL80211_RADAR_CAC_STARTED))
1127 return;
1128
1129 switch (event) {
1130 case NL80211_RADAR_CAC_FINISHED:
1131 timeout = wdev->cac_start_time +
1132 msecs_to_jiffies(wdev->cac_time_ms);
1133 WARN_ON(!time_after_eq(jiffies, timeout));
1134 cfg80211_set_dfs_state(wiphy, chandef, NL80211_DFS_AVAILABLE);
1135 memcpy(&rdev->cac_done_chandef, chandef,
1136 sizeof(struct cfg80211_chan_def));
1137 queue_work(cfg80211_wq, &rdev->propagate_cac_done_wk);
1138 cfg80211_sched_dfs_chan_update(rdev);
1139 fallthrough;
1140 case NL80211_RADAR_CAC_ABORTED:
1141 wdev->cac_started = false;
1142 break;
1143 case NL80211_RADAR_CAC_STARTED:
1144 wdev->cac_started = true;
1145 break;
1146 default:
1147 WARN_ON(1);
1148 return;
1149 }
1150
1151 nl80211_radar_notify(rdev, chandef, event, netdev, gfp);
1152}
1153EXPORT_SYMBOL(cfg80211_cac_event);
1154
1155static void
1156__cfg80211_background_cac_event(struct cfg80211_registered_device *rdev,
1157 struct wireless_dev *wdev,
1158 const struct cfg80211_chan_def *chandef,
1159 enum nl80211_radar_event event)
1160{
1161 struct wiphy *wiphy = &rdev->wiphy;
1162 struct net_device *netdev;
1163
1164 lockdep_assert_wiphy(&rdev->wiphy);
1165
1166 if (!cfg80211_chandef_valid(chandef))
1167 return;
1168
1169 if (!rdev->background_radar_wdev)
1170 return;
1171
1172 switch (event) {
1173 case NL80211_RADAR_CAC_FINISHED:
1174 cfg80211_set_dfs_state(wiphy, chandef, NL80211_DFS_AVAILABLE);
1175 memcpy(&rdev->cac_done_chandef, chandef, sizeof(*chandef));
1176 queue_work(cfg80211_wq, &rdev->propagate_cac_done_wk);
1177 cfg80211_sched_dfs_chan_update(rdev);
1178 wdev = rdev->background_radar_wdev;
1179 break;
1180 case NL80211_RADAR_CAC_ABORTED:
1181 if (!cancel_delayed_work(&rdev->background_cac_done_wk))
1182 return;
1183 wdev = rdev->background_radar_wdev;
1184 break;
1185 case NL80211_RADAR_CAC_STARTED:
1186 break;
1187 default:
1188 return;
1189 }
1190
1191 netdev = wdev ? wdev->netdev : NULL;
1192 nl80211_radar_notify(rdev, chandef, event, netdev, GFP_KERNEL);
1193}
1194
1195static void
1196cfg80211_background_cac_event(struct cfg80211_registered_device *rdev,
1197 const struct cfg80211_chan_def *chandef,
1198 enum nl80211_radar_event event)
1199{
1200 wiphy_lock(&rdev->wiphy);
1201 __cfg80211_background_cac_event(rdev, rdev->background_radar_wdev,
1202 chandef, event);
1203 wiphy_unlock(&rdev->wiphy);
1204}
1205
1206void cfg80211_background_cac_done_wk(struct work_struct *work)
1207{
1208 struct delayed_work *delayed_work = to_delayed_work(work);
1209 struct cfg80211_registered_device *rdev;
1210
1211 rdev = container_of(delayed_work, struct cfg80211_registered_device,
1212 background_cac_done_wk);
1213 cfg80211_background_cac_event(rdev, &rdev->background_radar_chandef,
1214 NL80211_RADAR_CAC_FINISHED);
1215}
1216
1217void cfg80211_background_cac_abort_wk(struct work_struct *work)
1218{
1219 struct cfg80211_registered_device *rdev;
1220
1221 rdev = container_of(work, struct cfg80211_registered_device,
1222 background_cac_abort_wk);
1223 cfg80211_background_cac_event(rdev, &rdev->background_radar_chandef,
1224 NL80211_RADAR_CAC_ABORTED);
1225}
1226
1227void cfg80211_background_cac_abort(struct wiphy *wiphy)
1228{
1229 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
1230
1231 queue_work(cfg80211_wq, &rdev->background_cac_abort_wk);
1232}
1233EXPORT_SYMBOL(cfg80211_background_cac_abort);
1234
1235int
1236cfg80211_start_background_radar_detection(struct cfg80211_registered_device *rdev,
1237 struct wireless_dev *wdev,
1238 struct cfg80211_chan_def *chandef)
1239{
1240 unsigned int cac_time_ms;
1241 int err;
1242
1243 lockdep_assert_wiphy(&rdev->wiphy);
1244
1245 if (!wiphy_ext_feature_isset(&rdev->wiphy,
1246 NL80211_EXT_FEATURE_RADAR_BACKGROUND))
1247 return -EOPNOTSUPP;
1248
1249 /* Offchannel chain already locked by another wdev */
1250 if (rdev->background_radar_wdev && rdev->background_radar_wdev != wdev)
1251 return -EBUSY;
1252
1253 /* CAC already in progress on the offchannel chain */
1254 if (rdev->background_radar_wdev == wdev &&
1255 delayed_work_pending(&rdev->background_cac_done_wk))
1256 return -EBUSY;
1257
1258 err = rdev_set_radar_background(rdev, chandef);
1259 if (err)
1260 return err;
1261
1262 cac_time_ms = cfg80211_chandef_dfs_cac_time(&rdev->wiphy, chandef);
1263 if (!cac_time_ms)
1264 cac_time_ms = IEEE80211_DFS_MIN_CAC_TIME_MS;
1265
1266 rdev->background_radar_chandef = *chandef;
1267 rdev->background_radar_wdev = wdev; /* Get offchain ownership */
1268
1269 __cfg80211_background_cac_event(rdev, wdev, chandef,
1270 NL80211_RADAR_CAC_STARTED);
1271 queue_delayed_work(cfg80211_wq, &rdev->background_cac_done_wk,
1272 msecs_to_jiffies(cac_time_ms));
1273
1274 return 0;
1275}
1276
1277void cfg80211_stop_background_radar_detection(struct wireless_dev *wdev)
1278{
1279 struct wiphy *wiphy = wdev->wiphy;
1280 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
1281
1282 lockdep_assert_wiphy(wiphy);
1283
1284 if (wdev != rdev->background_radar_wdev)
1285 return;
1286
1287 rdev_set_radar_background(rdev, NULL);
1288 rdev->background_radar_wdev = NULL; /* Release offchain ownership */
1289
1290 __cfg80211_background_cac_event(rdev, wdev,
1291 &rdev->background_radar_chandef,
1292 NL80211_RADAR_CAC_ABORTED);
1293}
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 */
8
9#include <linux/kernel.h>
10#include <linux/module.h>
11#include <linux/etherdevice.h>
12#include <linux/netdevice.h>
13#include <linux/nl80211.h>
14#include <linux/slab.h>
15#include <linux/wireless.h>
16#include <net/cfg80211.h>
17#include <net/iw_handler.h>
18#include "core.h"
19#include "nl80211.h"
20#include "rdev-ops.h"
21
22
23void cfg80211_rx_assoc_resp(struct net_device *dev, struct cfg80211_bss *bss,
24 const u8 *buf, size_t len, int uapsd_queues)
25{
26 struct wireless_dev *wdev = dev->ieee80211_ptr;
27 struct wiphy *wiphy = wdev->wiphy;
28 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
29 struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)buf;
30 struct cfg80211_connect_resp_params cr;
31
32 memset(&cr, 0, sizeof(cr));
33 cr.status = (int)le16_to_cpu(mgmt->u.assoc_resp.status_code);
34 cr.bssid = mgmt->bssid;
35 cr.bss = bss;
36 cr.resp_ie = mgmt->u.assoc_resp.variable;
37 cr.resp_ie_len =
38 len - offsetof(struct ieee80211_mgmt, u.assoc_resp.variable);
39 cr.timeout_reason = NL80211_TIMEOUT_UNSPECIFIED;
40
41 trace_cfg80211_send_rx_assoc(dev, bss);
42
43 /*
44 * This is a bit of a hack, we don't notify userspace of
45 * a (re-)association reply if we tried to send a reassoc
46 * and got a reject -- we only try again with an assoc
47 * frame instead of reassoc.
48 */
49 if (cfg80211_sme_rx_assoc_resp(wdev, cr.status)) {
50 cfg80211_unhold_bss(bss_from_pub(bss));
51 cfg80211_put_bss(wiphy, bss);
52 return;
53 }
54
55 nl80211_send_rx_assoc(rdev, dev, buf, len, GFP_KERNEL, uapsd_queues);
56 /* update current_bss etc., consumes the bss reference */
57 __cfg80211_connect_result(dev, &cr, cr.status == WLAN_STATUS_SUCCESS);
58}
59EXPORT_SYMBOL(cfg80211_rx_assoc_resp);
60
61static void cfg80211_process_auth(struct wireless_dev *wdev,
62 const u8 *buf, size_t len)
63{
64 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
65
66 nl80211_send_rx_auth(rdev, wdev->netdev, buf, len, GFP_KERNEL);
67 cfg80211_sme_rx_auth(wdev, buf, len);
68}
69
70static void cfg80211_process_deauth(struct wireless_dev *wdev,
71 const u8 *buf, size_t len)
72{
73 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
74 struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)buf;
75 const u8 *bssid = mgmt->bssid;
76 u16 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
77 bool from_ap = !ether_addr_equal(mgmt->sa, wdev->netdev->dev_addr);
78
79 nl80211_send_deauth(rdev, wdev->netdev, buf, len, GFP_KERNEL);
80
81 if (!wdev->current_bss ||
82 !ether_addr_equal(wdev->current_bss->pub.bssid, bssid))
83 return;
84
85 __cfg80211_disconnected(wdev->netdev, NULL, 0, reason_code, from_ap);
86 cfg80211_sme_deauth(wdev);
87}
88
89static void cfg80211_process_disassoc(struct wireless_dev *wdev,
90 const u8 *buf, size_t len)
91{
92 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
93 struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)buf;
94 const u8 *bssid = mgmt->bssid;
95 u16 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
96 bool from_ap = !ether_addr_equal(mgmt->sa, wdev->netdev->dev_addr);
97
98 nl80211_send_disassoc(rdev, wdev->netdev, buf, len, GFP_KERNEL);
99
100 if (WARN_ON(!wdev->current_bss ||
101 !ether_addr_equal(wdev->current_bss->pub.bssid, bssid)))
102 return;
103
104 __cfg80211_disconnected(wdev->netdev, NULL, 0, reason_code, from_ap);
105 cfg80211_sme_disassoc(wdev);
106}
107
108void cfg80211_rx_mlme_mgmt(struct net_device *dev, const u8 *buf, size_t len)
109{
110 struct wireless_dev *wdev = dev->ieee80211_ptr;
111 struct ieee80211_mgmt *mgmt = (void *)buf;
112
113 ASSERT_WDEV_LOCK(wdev);
114
115 trace_cfg80211_rx_mlme_mgmt(dev, buf, len);
116
117 if (WARN_ON(len < 2))
118 return;
119
120 if (ieee80211_is_auth(mgmt->frame_control))
121 cfg80211_process_auth(wdev, buf, len);
122 else if (ieee80211_is_deauth(mgmt->frame_control))
123 cfg80211_process_deauth(wdev, buf, len);
124 else if (ieee80211_is_disassoc(mgmt->frame_control))
125 cfg80211_process_disassoc(wdev, buf, len);
126}
127EXPORT_SYMBOL(cfg80211_rx_mlme_mgmt);
128
129void cfg80211_auth_timeout(struct net_device *dev, const u8 *addr)
130{
131 struct wireless_dev *wdev = dev->ieee80211_ptr;
132 struct wiphy *wiphy = wdev->wiphy;
133 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
134
135 trace_cfg80211_send_auth_timeout(dev, addr);
136
137 nl80211_send_auth_timeout(rdev, dev, addr, GFP_KERNEL);
138 cfg80211_sme_auth_timeout(wdev);
139}
140EXPORT_SYMBOL(cfg80211_auth_timeout);
141
142void cfg80211_assoc_timeout(struct net_device *dev, struct cfg80211_bss *bss)
143{
144 struct wireless_dev *wdev = dev->ieee80211_ptr;
145 struct wiphy *wiphy = wdev->wiphy;
146 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
147
148 trace_cfg80211_send_assoc_timeout(dev, bss->bssid);
149
150 nl80211_send_assoc_timeout(rdev, dev, bss->bssid, GFP_KERNEL);
151 cfg80211_sme_assoc_timeout(wdev);
152
153 cfg80211_unhold_bss(bss_from_pub(bss));
154 cfg80211_put_bss(wiphy, bss);
155}
156EXPORT_SYMBOL(cfg80211_assoc_timeout);
157
158void cfg80211_abandon_assoc(struct net_device *dev, struct cfg80211_bss *bss)
159{
160 struct wireless_dev *wdev = dev->ieee80211_ptr;
161 struct wiphy *wiphy = wdev->wiphy;
162
163 cfg80211_sme_abandon_assoc(wdev);
164
165 cfg80211_unhold_bss(bss_from_pub(bss));
166 cfg80211_put_bss(wiphy, bss);
167}
168EXPORT_SYMBOL(cfg80211_abandon_assoc);
169
170void cfg80211_tx_mlme_mgmt(struct net_device *dev, const u8 *buf, size_t len)
171{
172 struct wireless_dev *wdev = dev->ieee80211_ptr;
173 struct ieee80211_mgmt *mgmt = (void *)buf;
174
175 ASSERT_WDEV_LOCK(wdev);
176
177 trace_cfg80211_tx_mlme_mgmt(dev, buf, len);
178
179 if (WARN_ON(len < 2))
180 return;
181
182 if (ieee80211_is_deauth(mgmt->frame_control))
183 cfg80211_process_deauth(wdev, buf, len);
184 else
185 cfg80211_process_disassoc(wdev, buf, len);
186}
187EXPORT_SYMBOL(cfg80211_tx_mlme_mgmt);
188
189void cfg80211_michael_mic_failure(struct net_device *dev, const u8 *addr,
190 enum nl80211_key_type key_type, int key_id,
191 const u8 *tsc, gfp_t gfp)
192{
193 struct wiphy *wiphy = dev->ieee80211_ptr->wiphy;
194 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
195#ifdef CONFIG_CFG80211_WEXT
196 union iwreq_data wrqu;
197 char *buf = kmalloc(128, gfp);
198
199 if (buf) {
200 sprintf(buf, "MLME-MICHAELMICFAILURE.indication("
201 "keyid=%d %scast addr=%pM)", key_id,
202 key_type == NL80211_KEYTYPE_GROUP ? "broad" : "uni",
203 addr);
204 memset(&wrqu, 0, sizeof(wrqu));
205 wrqu.data.length = strlen(buf);
206 wireless_send_event(dev, IWEVCUSTOM, &wrqu, buf);
207 kfree(buf);
208 }
209#endif
210
211 trace_cfg80211_michael_mic_failure(dev, addr, key_type, key_id, tsc);
212 nl80211_michael_mic_failure(rdev, dev, addr, key_type, key_id, tsc, gfp);
213}
214EXPORT_SYMBOL(cfg80211_michael_mic_failure);
215
216/* some MLME handling for userspace SME */
217int cfg80211_mlme_auth(struct cfg80211_registered_device *rdev,
218 struct net_device *dev,
219 struct ieee80211_channel *chan,
220 enum nl80211_auth_type auth_type,
221 const u8 *bssid,
222 const u8 *ssid, int ssid_len,
223 const u8 *ie, int ie_len,
224 const u8 *key, int key_len, int key_idx,
225 const u8 *auth_data, int auth_data_len)
226{
227 struct wireless_dev *wdev = dev->ieee80211_ptr;
228 struct cfg80211_auth_request req = {
229 .ie = ie,
230 .ie_len = ie_len,
231 .auth_data = auth_data,
232 .auth_data_len = auth_data_len,
233 .auth_type = auth_type,
234 .key = key,
235 .key_len = key_len,
236 .key_idx = key_idx,
237 };
238 int err;
239
240 ASSERT_WDEV_LOCK(wdev);
241
242 if (auth_type == NL80211_AUTHTYPE_SHARED_KEY)
243 if (!key || !key_len || key_idx < 0 || key_idx > 3)
244 return -EINVAL;
245
246 if (wdev->current_bss &&
247 ether_addr_equal(bssid, wdev->current_bss->pub.bssid))
248 return -EALREADY;
249
250 req.bss = cfg80211_get_bss(&rdev->wiphy, chan, bssid, ssid, ssid_len,
251 IEEE80211_BSS_TYPE_ESS,
252 IEEE80211_PRIVACY_ANY);
253 if (!req.bss)
254 return -ENOENT;
255
256 err = rdev_auth(rdev, dev, &req);
257
258 cfg80211_put_bss(&rdev->wiphy, req.bss);
259 return err;
260}
261
262/* Do a logical ht_capa &= ht_capa_mask. */
263void cfg80211_oper_and_ht_capa(struct ieee80211_ht_cap *ht_capa,
264 const struct ieee80211_ht_cap *ht_capa_mask)
265{
266 int i;
267 u8 *p1, *p2;
268 if (!ht_capa_mask) {
269 memset(ht_capa, 0, sizeof(*ht_capa));
270 return;
271 }
272
273 p1 = (u8*)(ht_capa);
274 p2 = (u8*)(ht_capa_mask);
275 for (i = 0; i<sizeof(*ht_capa); i++)
276 p1[i] &= p2[i];
277}
278
279/* Do a logical ht_capa &= ht_capa_mask. */
280void cfg80211_oper_and_vht_capa(struct ieee80211_vht_cap *vht_capa,
281 const struct ieee80211_vht_cap *vht_capa_mask)
282{
283 int i;
284 u8 *p1, *p2;
285 if (!vht_capa_mask) {
286 memset(vht_capa, 0, sizeof(*vht_capa));
287 return;
288 }
289
290 p1 = (u8*)(vht_capa);
291 p2 = (u8*)(vht_capa_mask);
292 for (i = 0; i < sizeof(*vht_capa); i++)
293 p1[i] &= p2[i];
294}
295
296int cfg80211_mlme_assoc(struct cfg80211_registered_device *rdev,
297 struct net_device *dev,
298 struct ieee80211_channel *chan,
299 const u8 *bssid,
300 const u8 *ssid, int ssid_len,
301 struct cfg80211_assoc_request *req)
302{
303 struct wireless_dev *wdev = dev->ieee80211_ptr;
304 int err;
305
306 ASSERT_WDEV_LOCK(wdev);
307
308 if (wdev->current_bss &&
309 (!req->prev_bssid || !ether_addr_equal(wdev->current_bss->pub.bssid,
310 req->prev_bssid)))
311 return -EALREADY;
312
313 cfg80211_oper_and_ht_capa(&req->ht_capa_mask,
314 rdev->wiphy.ht_capa_mod_mask);
315 cfg80211_oper_and_vht_capa(&req->vht_capa_mask,
316 rdev->wiphy.vht_capa_mod_mask);
317
318 req->bss = cfg80211_get_bss(&rdev->wiphy, chan, bssid, ssid, ssid_len,
319 IEEE80211_BSS_TYPE_ESS,
320 IEEE80211_PRIVACY_ANY);
321 if (!req->bss)
322 return -ENOENT;
323
324 err = rdev_assoc(rdev, dev, req);
325 if (!err)
326 cfg80211_hold_bss(bss_from_pub(req->bss));
327 else
328 cfg80211_put_bss(&rdev->wiphy, req->bss);
329
330 return err;
331}
332
333int cfg80211_mlme_deauth(struct cfg80211_registered_device *rdev,
334 struct net_device *dev, const u8 *bssid,
335 const u8 *ie, int ie_len, u16 reason,
336 bool local_state_change)
337{
338 struct wireless_dev *wdev = dev->ieee80211_ptr;
339 struct cfg80211_deauth_request req = {
340 .bssid = bssid,
341 .reason_code = reason,
342 .ie = ie,
343 .ie_len = ie_len,
344 .local_state_change = local_state_change,
345 };
346
347 ASSERT_WDEV_LOCK(wdev);
348
349 if (local_state_change &&
350 (!wdev->current_bss ||
351 !ether_addr_equal(wdev->current_bss->pub.bssid, bssid)))
352 return 0;
353
354 if (ether_addr_equal(wdev->disconnect_bssid, bssid) ||
355 (wdev->current_bss &&
356 ether_addr_equal(wdev->current_bss->pub.bssid, bssid)))
357 wdev->conn_owner_nlportid = 0;
358
359 return rdev_deauth(rdev, dev, &req);
360}
361
362int cfg80211_mlme_disassoc(struct cfg80211_registered_device *rdev,
363 struct net_device *dev, const u8 *bssid,
364 const u8 *ie, int ie_len, u16 reason,
365 bool local_state_change)
366{
367 struct wireless_dev *wdev = dev->ieee80211_ptr;
368 struct cfg80211_disassoc_request req = {
369 .reason_code = reason,
370 .local_state_change = local_state_change,
371 .ie = ie,
372 .ie_len = ie_len,
373 };
374 int err;
375
376 ASSERT_WDEV_LOCK(wdev);
377
378 if (!wdev->current_bss)
379 return -ENOTCONN;
380
381 if (ether_addr_equal(wdev->current_bss->pub.bssid, bssid))
382 req.bss = &wdev->current_bss->pub;
383 else
384 return -ENOTCONN;
385
386 err = rdev_disassoc(rdev, dev, &req);
387 if (err)
388 return err;
389
390 /* driver should have reported the disassoc */
391 WARN_ON(wdev->current_bss);
392 return 0;
393}
394
395void cfg80211_mlme_down(struct cfg80211_registered_device *rdev,
396 struct net_device *dev)
397{
398 struct wireless_dev *wdev = dev->ieee80211_ptr;
399 u8 bssid[ETH_ALEN];
400
401 ASSERT_WDEV_LOCK(wdev);
402
403 if (!rdev->ops->deauth)
404 return;
405
406 if (!wdev->current_bss)
407 return;
408
409 memcpy(bssid, wdev->current_bss->pub.bssid, ETH_ALEN);
410 cfg80211_mlme_deauth(rdev, dev, bssid, NULL, 0,
411 WLAN_REASON_DEAUTH_LEAVING, false);
412}
413
414struct cfg80211_mgmt_registration {
415 struct list_head list;
416 struct wireless_dev *wdev;
417
418 u32 nlportid;
419
420 int match_len;
421
422 __le16 frame_type;
423
424 u8 match[];
425};
426
427static void
428cfg80211_process_mlme_unregistrations(struct cfg80211_registered_device *rdev)
429{
430 struct cfg80211_mgmt_registration *reg;
431
432 ASSERT_RTNL();
433
434 spin_lock_bh(&rdev->mlme_unreg_lock);
435 while ((reg = list_first_entry_or_null(&rdev->mlme_unreg,
436 struct cfg80211_mgmt_registration,
437 list))) {
438 list_del(®->list);
439 spin_unlock_bh(&rdev->mlme_unreg_lock);
440
441 if (rdev->ops->mgmt_frame_register) {
442 u16 frame_type = le16_to_cpu(reg->frame_type);
443
444 rdev_mgmt_frame_register(rdev, reg->wdev,
445 frame_type, false);
446 }
447
448 kfree(reg);
449
450 spin_lock_bh(&rdev->mlme_unreg_lock);
451 }
452 spin_unlock_bh(&rdev->mlme_unreg_lock);
453}
454
455void cfg80211_mlme_unreg_wk(struct work_struct *wk)
456{
457 struct cfg80211_registered_device *rdev;
458
459 rdev = container_of(wk, struct cfg80211_registered_device,
460 mlme_unreg_wk);
461
462 rtnl_lock();
463 cfg80211_process_mlme_unregistrations(rdev);
464 rtnl_unlock();
465}
466
467int cfg80211_mlme_register_mgmt(struct wireless_dev *wdev, u32 snd_portid,
468 u16 frame_type, const u8 *match_data,
469 int match_len)
470{
471 struct wiphy *wiphy = wdev->wiphy;
472 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
473 struct cfg80211_mgmt_registration *reg, *nreg;
474 int err = 0;
475 u16 mgmt_type;
476
477 if (!wdev->wiphy->mgmt_stypes)
478 return -EOPNOTSUPP;
479
480 if ((frame_type & IEEE80211_FCTL_FTYPE) != IEEE80211_FTYPE_MGMT)
481 return -EINVAL;
482
483 if (frame_type & ~(IEEE80211_FCTL_FTYPE | IEEE80211_FCTL_STYPE))
484 return -EINVAL;
485
486 mgmt_type = (frame_type & IEEE80211_FCTL_STYPE) >> 4;
487 if (!(wdev->wiphy->mgmt_stypes[wdev->iftype].rx & BIT(mgmt_type)))
488 return -EINVAL;
489
490 nreg = kzalloc(sizeof(*reg) + match_len, GFP_KERNEL);
491 if (!nreg)
492 return -ENOMEM;
493
494 spin_lock_bh(&wdev->mgmt_registrations_lock);
495
496 list_for_each_entry(reg, &wdev->mgmt_registrations, list) {
497 int mlen = min(match_len, reg->match_len);
498
499 if (frame_type != le16_to_cpu(reg->frame_type))
500 continue;
501
502 if (memcmp(reg->match, match_data, mlen) == 0) {
503 err = -EALREADY;
504 break;
505 }
506 }
507
508 if (err) {
509 kfree(nreg);
510 goto out;
511 }
512
513 memcpy(nreg->match, match_data, match_len);
514 nreg->match_len = match_len;
515 nreg->nlportid = snd_portid;
516 nreg->frame_type = cpu_to_le16(frame_type);
517 nreg->wdev = wdev;
518 list_add(&nreg->list, &wdev->mgmt_registrations);
519 spin_unlock_bh(&wdev->mgmt_registrations_lock);
520
521 /* process all unregistrations to avoid driver confusion */
522 cfg80211_process_mlme_unregistrations(rdev);
523
524 if (rdev->ops->mgmt_frame_register)
525 rdev_mgmt_frame_register(rdev, wdev, frame_type, true);
526
527 return 0;
528
529 out:
530 spin_unlock_bh(&wdev->mgmt_registrations_lock);
531
532 return err;
533}
534
535void cfg80211_mlme_unregister_socket(struct wireless_dev *wdev, u32 nlportid)
536{
537 struct wiphy *wiphy = wdev->wiphy;
538 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
539 struct cfg80211_mgmt_registration *reg, *tmp;
540
541 spin_lock_bh(&wdev->mgmt_registrations_lock);
542
543 list_for_each_entry_safe(reg, tmp, &wdev->mgmt_registrations, list) {
544 if (reg->nlportid != nlportid)
545 continue;
546
547 list_del(®->list);
548 spin_lock(&rdev->mlme_unreg_lock);
549 list_add_tail(®->list, &rdev->mlme_unreg);
550 spin_unlock(&rdev->mlme_unreg_lock);
551
552 schedule_work(&rdev->mlme_unreg_wk);
553 }
554
555 spin_unlock_bh(&wdev->mgmt_registrations_lock);
556
557 if (nlportid && rdev->crit_proto_nlportid == nlportid) {
558 rdev->crit_proto_nlportid = 0;
559 rdev_crit_proto_stop(rdev, wdev);
560 }
561
562 if (nlportid == wdev->ap_unexpected_nlportid)
563 wdev->ap_unexpected_nlportid = 0;
564}
565
566void cfg80211_mlme_purge_registrations(struct wireless_dev *wdev)
567{
568 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
569
570 spin_lock_bh(&wdev->mgmt_registrations_lock);
571 spin_lock(&rdev->mlme_unreg_lock);
572 list_splice_tail_init(&wdev->mgmt_registrations, &rdev->mlme_unreg);
573 spin_unlock(&rdev->mlme_unreg_lock);
574 spin_unlock_bh(&wdev->mgmt_registrations_lock);
575
576 cfg80211_process_mlme_unregistrations(rdev);
577}
578
579int cfg80211_mlme_mgmt_tx(struct cfg80211_registered_device *rdev,
580 struct wireless_dev *wdev,
581 struct cfg80211_mgmt_tx_params *params, u64 *cookie)
582{
583 const struct ieee80211_mgmt *mgmt;
584 u16 stype;
585
586 if (!wdev->wiphy->mgmt_stypes)
587 return -EOPNOTSUPP;
588
589 if (!rdev->ops->mgmt_tx)
590 return -EOPNOTSUPP;
591
592 if (params->len < 24 + 1)
593 return -EINVAL;
594
595 mgmt = (const struct ieee80211_mgmt *)params->buf;
596
597 if (!ieee80211_is_mgmt(mgmt->frame_control))
598 return -EINVAL;
599
600 stype = le16_to_cpu(mgmt->frame_control) & IEEE80211_FCTL_STYPE;
601 if (!(wdev->wiphy->mgmt_stypes[wdev->iftype].tx & BIT(stype >> 4)))
602 return -EINVAL;
603
604 if (ieee80211_is_action(mgmt->frame_control) &&
605 mgmt->u.action.category != WLAN_CATEGORY_PUBLIC) {
606 int err = 0;
607
608 wdev_lock(wdev);
609
610 switch (wdev->iftype) {
611 case NL80211_IFTYPE_ADHOC:
612 case NL80211_IFTYPE_STATION:
613 case NL80211_IFTYPE_P2P_CLIENT:
614 if (!wdev->current_bss) {
615 err = -ENOTCONN;
616 break;
617 }
618
619 if (!ether_addr_equal(wdev->current_bss->pub.bssid,
620 mgmt->bssid)) {
621 err = -ENOTCONN;
622 break;
623 }
624
625 /*
626 * check for IBSS DA must be done by driver as
627 * cfg80211 doesn't track the stations
628 */
629 if (wdev->iftype == NL80211_IFTYPE_ADHOC)
630 break;
631
632 /* for station, check that DA is the AP */
633 if (!ether_addr_equal(wdev->current_bss->pub.bssid,
634 mgmt->da)) {
635 err = -ENOTCONN;
636 break;
637 }
638 break;
639 case NL80211_IFTYPE_AP:
640 case NL80211_IFTYPE_P2P_GO:
641 case NL80211_IFTYPE_AP_VLAN:
642 if (!ether_addr_equal(mgmt->bssid, wdev_address(wdev)))
643 err = -EINVAL;
644 break;
645 case NL80211_IFTYPE_MESH_POINT:
646 if (!ether_addr_equal(mgmt->sa, mgmt->bssid)) {
647 err = -EINVAL;
648 break;
649 }
650 /*
651 * check for mesh DA must be done by driver as
652 * cfg80211 doesn't track the stations
653 */
654 break;
655 case NL80211_IFTYPE_P2P_DEVICE:
656 /*
657 * fall through, P2P device only supports
658 * public action frames
659 */
660 case NL80211_IFTYPE_NAN:
661 default:
662 err = -EOPNOTSUPP;
663 break;
664 }
665 wdev_unlock(wdev);
666
667 if (err)
668 return err;
669 }
670
671 if (!ether_addr_equal(mgmt->sa, wdev_address(wdev))) {
672 /* Allow random TA to be used with Public Action frames if the
673 * driver has indicated support for this. Otherwise, only allow
674 * the local address to be used.
675 */
676 if (!ieee80211_is_action(mgmt->frame_control) ||
677 mgmt->u.action.category != WLAN_CATEGORY_PUBLIC)
678 return -EINVAL;
679 if (!wdev->current_bss &&
680 !wiphy_ext_feature_isset(
681 &rdev->wiphy,
682 NL80211_EXT_FEATURE_MGMT_TX_RANDOM_TA))
683 return -EINVAL;
684 if (wdev->current_bss &&
685 !wiphy_ext_feature_isset(
686 &rdev->wiphy,
687 NL80211_EXT_FEATURE_MGMT_TX_RANDOM_TA_CONNECTED))
688 return -EINVAL;
689 }
690
691 /* Transmit the Action frame as requested by user space */
692 return rdev_mgmt_tx(rdev, wdev, params, cookie);
693}
694
695bool cfg80211_rx_mgmt(struct wireless_dev *wdev, int freq, int sig_dbm,
696 const u8 *buf, size_t len, u32 flags)
697{
698 struct wiphy *wiphy = wdev->wiphy;
699 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
700 struct cfg80211_mgmt_registration *reg;
701 const struct ieee80211_txrx_stypes *stypes =
702 &wiphy->mgmt_stypes[wdev->iftype];
703 struct ieee80211_mgmt *mgmt = (void *)buf;
704 const u8 *data;
705 int data_len;
706 bool result = false;
707 __le16 ftype = mgmt->frame_control &
708 cpu_to_le16(IEEE80211_FCTL_FTYPE | IEEE80211_FCTL_STYPE);
709 u16 stype;
710
711 trace_cfg80211_rx_mgmt(wdev, freq, sig_dbm);
712 stype = (le16_to_cpu(mgmt->frame_control) & IEEE80211_FCTL_STYPE) >> 4;
713
714 if (!(stypes->rx & BIT(stype))) {
715 trace_cfg80211_return_bool(false);
716 return false;
717 }
718
719 data = buf + ieee80211_hdrlen(mgmt->frame_control);
720 data_len = len - ieee80211_hdrlen(mgmt->frame_control);
721
722 spin_lock_bh(&wdev->mgmt_registrations_lock);
723
724 list_for_each_entry(reg, &wdev->mgmt_registrations, list) {
725 if (reg->frame_type != ftype)
726 continue;
727
728 if (reg->match_len > data_len)
729 continue;
730
731 if (memcmp(reg->match, data, reg->match_len))
732 continue;
733
734 /* found match! */
735
736 /* Indicate the received Action frame to user space */
737 if (nl80211_send_mgmt(rdev, wdev, reg->nlportid,
738 freq, sig_dbm,
739 buf, len, flags, GFP_ATOMIC))
740 continue;
741
742 result = true;
743 break;
744 }
745
746 spin_unlock_bh(&wdev->mgmt_registrations_lock);
747
748 trace_cfg80211_return_bool(result);
749 return result;
750}
751EXPORT_SYMBOL(cfg80211_rx_mgmt);
752
753void cfg80211_sched_dfs_chan_update(struct cfg80211_registered_device *rdev)
754{
755 cancel_delayed_work(&rdev->dfs_update_channels_wk);
756 queue_delayed_work(cfg80211_wq, &rdev->dfs_update_channels_wk, 0);
757}
758
759void cfg80211_dfs_channels_update_work(struct work_struct *work)
760{
761 struct delayed_work *delayed_work = to_delayed_work(work);
762 struct cfg80211_registered_device *rdev;
763 struct cfg80211_chan_def chandef;
764 struct ieee80211_supported_band *sband;
765 struct ieee80211_channel *c;
766 struct wiphy *wiphy;
767 bool check_again = false;
768 unsigned long timeout, next_time = 0;
769 unsigned long time_dfs_update;
770 enum nl80211_radar_event radar_event;
771 int bandid, i;
772
773 rdev = container_of(delayed_work, struct cfg80211_registered_device,
774 dfs_update_channels_wk);
775 wiphy = &rdev->wiphy;
776
777 rtnl_lock();
778 for (bandid = 0; bandid < NUM_NL80211_BANDS; bandid++) {
779 sband = wiphy->bands[bandid];
780 if (!sband)
781 continue;
782
783 for (i = 0; i < sband->n_channels; i++) {
784 c = &sband->channels[i];
785
786 if (!(c->flags & IEEE80211_CHAN_RADAR))
787 continue;
788
789 if (c->dfs_state != NL80211_DFS_UNAVAILABLE &&
790 c->dfs_state != NL80211_DFS_AVAILABLE)
791 continue;
792
793 if (c->dfs_state == NL80211_DFS_UNAVAILABLE) {
794 time_dfs_update = IEEE80211_DFS_MIN_NOP_TIME_MS;
795 radar_event = NL80211_RADAR_NOP_FINISHED;
796 } else {
797 if (regulatory_pre_cac_allowed(wiphy) ||
798 cfg80211_any_wiphy_oper_chan(wiphy, c))
799 continue;
800
801 time_dfs_update = REG_PRE_CAC_EXPIRY_GRACE_MS;
802 radar_event = NL80211_RADAR_PRE_CAC_EXPIRED;
803 }
804
805 timeout = c->dfs_state_entered +
806 msecs_to_jiffies(time_dfs_update);
807
808 if (time_after_eq(jiffies, timeout)) {
809 c->dfs_state = NL80211_DFS_USABLE;
810 c->dfs_state_entered = jiffies;
811
812 cfg80211_chandef_create(&chandef, c,
813 NL80211_CHAN_NO_HT);
814
815 nl80211_radar_notify(rdev, &chandef,
816 radar_event, NULL,
817 GFP_ATOMIC);
818
819 regulatory_propagate_dfs_state(wiphy, &chandef,
820 c->dfs_state,
821 radar_event);
822 continue;
823 }
824
825 if (!check_again)
826 next_time = timeout - jiffies;
827 else
828 next_time = min(next_time, timeout - jiffies);
829 check_again = true;
830 }
831 }
832 rtnl_unlock();
833
834 /* reschedule if there are other channels waiting to be cleared again */
835 if (check_again)
836 queue_delayed_work(cfg80211_wq, &rdev->dfs_update_channels_wk,
837 next_time);
838}
839
840
841void cfg80211_radar_event(struct wiphy *wiphy,
842 struct cfg80211_chan_def *chandef,
843 gfp_t gfp)
844{
845 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
846
847 trace_cfg80211_radar_event(wiphy, chandef);
848
849 /* only set the chandef supplied channel to unavailable, in
850 * case the radar is detected on only one of multiple channels
851 * spanned by the chandef.
852 */
853 cfg80211_set_dfs_state(wiphy, chandef, NL80211_DFS_UNAVAILABLE);
854
855 cfg80211_sched_dfs_chan_update(rdev);
856
857 nl80211_radar_notify(rdev, chandef, NL80211_RADAR_DETECTED, NULL, gfp);
858
859 memcpy(&rdev->radar_chandef, chandef, sizeof(struct cfg80211_chan_def));
860 queue_work(cfg80211_wq, &rdev->propagate_radar_detect_wk);
861}
862EXPORT_SYMBOL(cfg80211_radar_event);
863
864void cfg80211_cac_event(struct net_device *netdev,
865 const struct cfg80211_chan_def *chandef,
866 enum nl80211_radar_event event, gfp_t gfp)
867{
868 struct wireless_dev *wdev = netdev->ieee80211_ptr;
869 struct wiphy *wiphy = wdev->wiphy;
870 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
871 unsigned long timeout;
872
873 trace_cfg80211_cac_event(netdev, event);
874
875 if (WARN_ON(!wdev->cac_started && event != NL80211_RADAR_CAC_STARTED))
876 return;
877
878 if (WARN_ON(!wdev->chandef.chan))
879 return;
880
881 switch (event) {
882 case NL80211_RADAR_CAC_FINISHED:
883 timeout = wdev->cac_start_time +
884 msecs_to_jiffies(wdev->cac_time_ms);
885 WARN_ON(!time_after_eq(jiffies, timeout));
886 cfg80211_set_dfs_state(wiphy, chandef, NL80211_DFS_AVAILABLE);
887 memcpy(&rdev->cac_done_chandef, chandef,
888 sizeof(struct cfg80211_chan_def));
889 queue_work(cfg80211_wq, &rdev->propagate_cac_done_wk);
890 cfg80211_sched_dfs_chan_update(rdev);
891 /* fall through */
892 case NL80211_RADAR_CAC_ABORTED:
893 wdev->cac_started = false;
894 break;
895 case NL80211_RADAR_CAC_STARTED:
896 wdev->cac_started = true;
897 break;
898 default:
899 WARN_ON(1);
900 return;
901 }
902
903 nl80211_radar_notify(rdev, chandef, event, netdev, gfp);
904}
905EXPORT_SYMBOL(cfg80211_cac_event);