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 | |
24 | void 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(netdev: 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, status: 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: bss_from_pub(pub: bss)); |
89 | cfg80211_put_bss(wiphy, bss); |
90 | } |
91 | return; |
92 | } |
93 | |
94 | nl80211_send_rx_assoc(rdev, netdev: dev, data); |
95 | /* update current_bss etc., consumes the bss reference */ |
96 | __cfg80211_connect_result(dev, params: &cr, wextev: cr.status == WLAN_STATUS_SUCCESS); |
97 | } |
98 | EXPORT_SYMBOL(cfg80211_rx_assoc_resp); |
99 | |
100 | static 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(wiphy: wdev->wiphy); |
104 | |
105 | nl80211_send_rx_auth(rdev, netdev: wdev->netdev, buf, len, GFP_KERNEL); |
106 | cfg80211_sme_rx_auth(wdev, buf, len); |
107 | } |
108 | |
109 | static 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(wiphy: 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(addr1: mgmt->sa, addr2: wdev->netdev->dev_addr); |
118 | |
119 | nl80211_send_deauth(rdev, netdev: wdev->netdev, buf, len, reconnect, GFP_KERNEL); |
120 | |
121 | if (!wdev->connected || !ether_addr_equal(addr1: wdev->u.client.connected_addr, addr2: bssid)) |
122 | return; |
123 | |
124 | __cfg80211_disconnected(dev: wdev->netdev, NULL, ie_len: 0, reason: reason_code, from_ap); |
125 | cfg80211_sme_deauth(wdev); |
126 | } |
127 | |
128 | static 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(wiphy: 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(addr1: mgmt->sa, addr2: wdev->netdev->dev_addr); |
137 | |
138 | nl80211_send_disassoc(rdev, netdev: 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(dev: wdev->netdev, NULL, ie_len: 0, reason: reason_code, from_ap); |
146 | cfg80211_sme_disassoc(wdev); |
147 | } |
148 | |
149 | void 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(netdev: dev, buf, len); |
157 | |
158 | if (WARN_ON(len < 2)) |
159 | return; |
160 | |
161 | if (ieee80211_is_auth(fc: mgmt->frame_control)) |
162 | cfg80211_process_auth(wdev, buf, len); |
163 | else if (ieee80211_is_deauth(fc: mgmt->frame_control)) |
164 | cfg80211_process_deauth(wdev, buf, len, reconnect: false); |
165 | else if (ieee80211_is_disassoc(fc: mgmt->frame_control)) |
166 | cfg80211_process_disassoc(wdev, buf, len, reconnect: false); |
167 | } |
168 | EXPORT_SYMBOL(cfg80211_rx_mlme_mgmt); |
169 | |
170 | void 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(netdev: dev, mac: addr); |
177 | |
178 | nl80211_send_auth_timeout(rdev, netdev: dev, addr, GFP_KERNEL); |
179 | cfg80211_sme_auth_timeout(wdev); |
180 | } |
181 | EXPORT_SYMBOL(cfg80211_auth_timeout); |
182 | |
183 | void 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(netdev: dev, data); |
193 | |
194 | if (data->timeout) { |
195 | nl80211_send_assoc_timeout(rdev, netdev: 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: bss_from_pub(pub: bss)); |
208 | cfg80211_put_bss(wiphy, bss); |
209 | } |
210 | } |
211 | EXPORT_SYMBOL(cfg80211_assoc_failure); |
212 | |
213 | void 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(netdev: dev, buf, len, reconnect); |
222 | |
223 | if (WARN_ON(len < 2)) |
224 | return; |
225 | |
226 | if (ieee80211_is_deauth(fc: mgmt->frame_control)) |
227 | cfg80211_process_deauth(wdev, buf, len, reconnect); |
228 | else |
229 | cfg80211_process_disassoc(wdev, buf, len, reconnect); |
230 | } |
231 | EXPORT_SYMBOL(cfg80211_tx_mlme_mgmt); |
232 | |
233 | void 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(size: 128, flags: gfp); |
242 | |
243 | if (buf) { |
244 | memset(&wrqu, 0, sizeof(wrqu)); |
245 | wrqu.data.length = |
246 | sprintf(buf, fmt: "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: &wrqu, extra: buf); |
251 | kfree(objp: buf); |
252 | } |
253 | #endif |
254 | |
255 | trace_cfg80211_michael_mic_failure(netdev: dev, addr, key_type, key_id, tsc); |
256 | nl80211_michael_mic_failure(rdev, netdev: dev, addr, key_type, key_id, tsc, gfp); |
257 | } |
258 | EXPORT_SYMBOL(cfg80211_michael_mic_failure); |
259 | |
260 | /* some MLME handling for userspace SME */ |
261 | int 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(addr1: req->bss->bssid, addr2: wdev->u.client.connected_addr)) |
284 | return -EALREADY; |
285 | |
286 | if (ether_addr_equal(addr1: req->bss->bssid, addr2: dev->dev_addr) || |
287 | (req->link_id >= 0 && |
288 | ether_addr_equal(addr1: req->ap_mld_addr, addr2: 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. */ |
295 | void 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. */ |
312 | void 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 | static int |
329 | cfg80211_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(p: common_a->mld_mac_addr, q: 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(data: (const u8 *)mle_a) != |
344 | ieee80211_mle_get_eml_med_sync_delay(data: (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(data: (const u8 *)mle_a) != |
350 | ieee80211_mle_get_eml_cap(data: (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(data: (const u8 *)mle_a) != |
356 | ieee80211_mle_get_mld_capa_op(data: (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 | |
364 | static 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(addr1: req->links[i].bss->bssid, addr2: 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(ext_eid: WLAN_EID_EXT_EHT_MULTI_LINK, |
395 | ies: ies->data, len: 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(data: ml->data + 1, |
403 | IEEE80211_ML_CONTROL_TYPE_BASIC, |
404 | len: 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(data: (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(mle_a: mles[req->link_id], mle_b: mles[i], |
430 | extack)) { |
431 | req->links[i].error = -EINVAL; |
432 | goto error; |
433 | } |
434 | } |
435 | |
436 | rcu_read_unlock(); |
437 | return 0; |
438 | error: |
439 | rcu_read_unlock(); |
440 | return -EINVAL; |
441 | } |
442 | |
443 | /* Note: caller must cfg80211_put_bss() regardless of result */ |
444 | int 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(addr1: wdev->u.client.connected_addr, addr2: req->prev_bssid))) |
461 | return -EALREADY; |
462 | |
463 | if ((req->bss && ether_addr_equal(addr1: req->bss->bssid, addr2: dev->dev_addr)) || |
464 | (req->link_id >= 0 && |
465 | ether_addr_equal(addr1: req->ap_mld_addr, addr2: dev->dev_addr))) |
466 | return -EINVAL; |
467 | |
468 | cfg80211_oper_and_ht_capa(ht_capa: &req->ht_capa_mask, |
469 | ht_capa_mask: rdev->wiphy.ht_capa_mod_mask); |
470 | cfg80211_oper_and_vht_capa(vht_capa: &req->vht_capa_mask, |
471 | vht_capa_mask: 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(wiphy: &rdev->wiphy, bss: req->bss); |
479 | cfg80211_hold_bss(bss: bss_from_pub(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(wiphy: &rdev->wiphy, bss: req->links[link_id].bss); |
486 | cfg80211_hold_bss(bss: bss_from_pub(pub: req->links[link_id].bss)); |
487 | } |
488 | } |
489 | return err; |
490 | } |
491 | |
492 | int 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(addr1: wdev->u.client.connected_addr, addr2: bssid))) |
511 | return 0; |
512 | |
513 | if (ether_addr_equal(addr1: wdev->disconnect_bssid, addr2: bssid) || |
514 | (wdev->connected && |
515 | ether_addr_equal(addr1: wdev->u.client.connected_addr, addr2: bssid))) |
516 | wdev->conn_owner_nlportid = 0; |
517 | |
518 | return rdev_deauth(rdev, dev, req: &req); |
519 | } |
520 | |
521 | int 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(p: wdev->u.client.connected_addr, q: ap_addr, ETH_ALEN)) |
542 | return -ENOTCONN; |
543 | |
544 | err = rdev_disassoc(rdev, dev, req: &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 | |
553 | void 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, ie_len: 0, |
569 | reason: WLAN_REASON_DEAUTH_LEAVING, local_state_change: false); |
570 | } |
571 | |
572 | struct 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 | |
587 | static void cfg80211_mgmt_registrations_update(struct wireless_dev *wdev) |
588 | { |
589 | struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy: 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(lock: &rdev->mgmt_registrations_lock); |
597 | if (!wdev->mgmt_registrations_need_update) { |
598 | spin_unlock_bh(lock: &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(lock: &rdev->mgmt_registrations_lock); |
624 | |
625 | rdev_update_mgmt_frame_registrations(rdev, wdev, upd: &upd); |
626 | } |
627 | |
628 | void 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(wiphy: &rdev->wiphy); |
637 | list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) |
638 | cfg80211_mgmt_registrations_update(wdev); |
639 | wiphy_unlock(wiphy: &rdev->wiphy); |
640 | } |
641 | |
642 | int 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(wiphy: 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(size: sizeof(*reg) + match_len, GFP_KERNEL); |
690 | if (!nreg) |
691 | return -ENOMEM; |
692 | |
693 | spin_lock_bh(lock: &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(p: reg->match, q: match_data, size: 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(objp: 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(new: &nreg->list, head: &wdev->mgmt_registrations); |
726 | } |
727 | wdev->mgmt_registrations_need_update = 1; |
728 | spin_unlock_bh(lock: &rdev->mgmt_registrations_lock); |
729 | |
730 | cfg80211_mgmt_registrations_update(wdev); |
731 | |
732 | return 0; |
733 | |
734 | out: |
735 | kfree(objp: nreg); |
736 | spin_unlock_bh(lock: &rdev->mgmt_registrations_lock); |
737 | |
738 | return err; |
739 | } |
740 | |
741 | void 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(lock: &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(entry: ®->list); |
754 | kfree(objp: reg); |
755 | |
756 | wdev->mgmt_registrations_need_update = 1; |
757 | schedule_work(work: &rdev->mgmt_registrations_update_wk); |
758 | } |
759 | |
760 | spin_unlock_bh(lock: &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 | |
771 | void cfg80211_mlme_purge_registrations(struct wireless_dev *wdev) |
772 | { |
773 | struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy: wdev->wiphy); |
774 | struct cfg80211_mgmt_registration *reg, *tmp; |
775 | |
776 | spin_lock_bh(lock: &rdev->mgmt_registrations_lock); |
777 | list_for_each_entry_safe(reg, tmp, &wdev->mgmt_registrations, list) { |
778 | list_del(entry: ®->list); |
779 | kfree(objp: reg); |
780 | } |
781 | wdev->mgmt_registrations_need_update = 1; |
782 | spin_unlock_bh(lock: &rdev->mgmt_registrations_lock); |
783 | |
784 | cfg80211_mgmt_registrations_update(wdev); |
785 | } |
786 | |
787 | static 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(addr1: addr, addr2: wdev->links[i].addr)) |
793 | return true; |
794 | } |
795 | |
796 | return ether_addr_equal(addr1: addr, addr2: wdev_address(wdev)); |
797 | } |
798 | |
799 | static bool cfg80211_allowed_random_address(struct wireless_dev *wdev, |
800 | const struct ieee80211_mgmt *mgmt) |
801 | { |
802 | if (ieee80211_is_auth(fc: mgmt->frame_control) || |
803 | ieee80211_is_deauth(fc: 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 | wiphy: wdev->wiphy, |
809 | ftidx: NL80211_EXT_FEATURE_AUTH_AND_DEAUTH_RANDOM_TA)) |
810 | return true; |
811 | } else if (ieee80211_is_action(fc: 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 | wiphy: wdev->wiphy, |
819 | ftidx: NL80211_EXT_FEATURE_MGMT_TX_RANDOM_TA)) |
820 | return true; |
821 | |
822 | if (wdev->connected && |
823 | wiphy_ext_feature_isset( |
824 | wiphy: wdev->wiphy, |
825 | ftidx: NL80211_EXT_FEATURE_MGMT_TX_RANDOM_TA_CONNECTED)) |
826 | return true; |
827 | } |
828 | |
829 | return false; |
830 | } |
831 | |
832 | int 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(fc: 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(fc: 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(addr1: wdev->u.ibss.current_bss->pub.bssid, |
871 | addr2: 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(addr1: wdev->u.client.connected_addr, |
886 | addr2: mgmt->bssid)) { |
887 | err = -ENOTCONN; |
888 | break; |
889 | } |
890 | |
891 | /* for station, check that DA is the AP */ |
892 | if (!ether_addr_equal(addr1: wdev->u.client.connected_addr, |
893 | addr2: 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(addr1: mgmt->bssid, addr2: wdev_address(wdev)) && |
902 | (params->link_id < 0 || |
903 | !ether_addr_equal(addr1: mgmt->bssid, |
904 | addr2: wdev->links[params->link_id].addr))) |
905 | err = -EINVAL; |
906 | break; |
907 | case NL80211_IFTYPE_MESH_POINT: |
908 | if (!ether_addr_equal(addr1: mgmt->sa, addr2: 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, addr: 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 | |
940 | bool 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(ret: false); |
961 | return false; |
962 | } |
963 | |
964 | data = info->buf + ieee80211_hdrlen(fc: mgmt->frame_control); |
965 | data_len = info->len - ieee80211_hdrlen(fc: mgmt->frame_control); |
966 | |
967 | spin_lock_bh(lock: &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(p: reg->match, q: data, size: 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, nlpid: reg->nlportid, info, |
983 | GFP_ATOMIC)) |
984 | continue; |
985 | |
986 | result = true; |
987 | break; |
988 | } |
989 | |
990 | spin_unlock_bh(lock: &rdev->mgmt_registrations_lock); |
991 | |
992 | trace_cfg80211_return_bool(ret: result); |
993 | return result; |
994 | } |
995 | EXPORT_SYMBOL(cfg80211_rx_mgmt_ext); |
996 | |
997 | void cfg80211_sched_dfs_chan_update(struct cfg80211_registered_device *rdev) |
998 | { |
999 | cancel_delayed_work(dwork: &rdev->dfs_update_channels_wk); |
1000 | queue_delayed_work(wq: cfg80211_wq, dwork: &rdev->dfs_update_channels_wk, delay: 0); |
1001 | } |
1002 | |
1003 | void 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, chan: 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(m: 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: &chandef, channel: c, |
1057 | chantype: NL80211_CHAN_NO_HT); |
1058 | |
1059 | nl80211_radar_notify(rdev, chandef: &chandef, |
1060 | event: radar_event, NULL, |
1061 | GFP_ATOMIC); |
1062 | |
1063 | regulatory_propagate_dfs_state(wiphy, chandef: &chandef, |
1064 | dfs_state: c->dfs_state, |
1065 | event: 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(wq: cfg80211_wq, dwork: &rdev->dfs_update_channels_wk, |
1081 | delay: next_time); |
1082 | } |
1083 | |
1084 | |
1085 | void __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, dfs_state: NL80211_DFS_UNAVAILABLE); |
1098 | |
1099 | if (offchan) |
1100 | queue_work(wq: cfg80211_wq, work: &rdev->background_cac_abort_wk); |
1101 | |
1102 | cfg80211_sched_dfs_chan_update(rdev); |
1103 | |
1104 | nl80211_radar_notify(rdev, chandef, event: NL80211_RADAR_DETECTED, NULL, gfp); |
1105 | |
1106 | memcpy(&rdev->radar_chandef, chandef, sizeof(struct cfg80211_chan_def)); |
1107 | queue_work(wq: cfg80211_wq, work: &rdev->propagate_radar_detect_wk); |
1108 | } |
1109 | EXPORT_SYMBOL(__cfg80211_radar_event); |
1110 | |
1111 | void 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, evt: 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(m: wdev->cac_time_ms); |
1133 | WARN_ON(!time_after_eq(jiffies, timeout)); |
1134 | cfg80211_set_dfs_state(wiphy, chandef, dfs_state: NL80211_DFS_AVAILABLE); |
1135 | memcpy(&rdev->cac_done_chandef, chandef, |
1136 | sizeof(struct cfg80211_chan_def)); |
1137 | queue_work(wq: cfg80211_wq, work: &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 | } |
1153 | EXPORT_SYMBOL(cfg80211_cac_event); |
1154 | |
1155 | static 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, dfs_state: NL80211_DFS_AVAILABLE); |
1175 | memcpy(&rdev->cac_done_chandef, chandef, sizeof(*chandef)); |
1176 | queue_work(wq: cfg80211_wq, work: &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(dwork: &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 | |
1195 | static void |
1196 | cfg80211_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(wiphy: &rdev->wiphy); |
1201 | __cfg80211_background_cac_event(rdev, wdev: rdev->background_radar_wdev, |
1202 | chandef, event); |
1203 | wiphy_unlock(wiphy: &rdev->wiphy); |
1204 | } |
1205 | |
1206 | void 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, chandef: &rdev->background_radar_chandef, |
1214 | event: NL80211_RADAR_CAC_FINISHED); |
1215 | } |
1216 | |
1217 | void 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, chandef: &rdev->background_radar_chandef, |
1224 | event: NL80211_RADAR_CAC_ABORTED); |
1225 | } |
1226 | |
1227 | void cfg80211_background_cac_abort(struct wiphy *wiphy) |
1228 | { |
1229 | struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy); |
1230 | |
1231 | queue_work(wq: cfg80211_wq, work: &rdev->background_cac_abort_wk); |
1232 | } |
1233 | EXPORT_SYMBOL(cfg80211_background_cac_abort); |
1234 | |
1235 | int |
1236 | cfg80211_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(wiphy: &rdev->wiphy, |
1246 | ftidx: 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(wiphy: &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 | event: NL80211_RADAR_CAC_STARTED); |
1271 | queue_delayed_work(wq: cfg80211_wq, dwork: &rdev->background_cac_done_wk, |
1272 | delay: msecs_to_jiffies(m: cac_time_ms)); |
1273 | |
1274 | return 0; |
1275 | } |
1276 | |
1277 | void 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 | chandef: &rdev->background_radar_chandef, |
1292 | event: NL80211_RADAR_CAC_ABORTED); |
1293 | } |
1294 | |