projects / linux-2.6-block.git / blame_incremental
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (non-incremental) | history | HEAD
Merge tag 'mm-hotfixes-stable-2025-07-11-16-16' of git://git.kernel.org/pub/scm/linux...
[linux-2.6-block.git] / net / wireless / sme.c
... / ...
CommitLineData
1// SPDX-License-Identifier: GPL-2.0
2/*
3 * SME code for cfg80211
4 * both driver SME event handling and the SME implementation
5 * (for nl80211's connect() and wext)
6 *
7 * Copyright 2009 Johannes Berg <johannes@sipsolutions.net>
8 * Copyright (C) 2009, 2020, 2022-2024 Intel Corporation. All rights reserved.
9 * Copyright 2017 Intel Deutschland GmbH
10 */
11
12#include <linux/etherdevice.h>
13#include <linux/if_arp.h>
14#include <linux/slab.h>
15#include <linux/workqueue.h>
16#include <linux/wireless.h>
17#include <linux/export.h>
18#include <net/iw_handler.h>
19#include <net/cfg80211.h>
20#include <net/rtnetlink.h>
21#include "nl80211.h"
22#include "reg.h"
23#include "rdev-ops.h"
24
25/*
26 * Software SME in cfg80211, using auth/assoc/deauth calls to the
27 * driver. This is for implementing nl80211's connect/disconnect
28 * and wireless extensions (if configured.)
29 */
30
31struct cfg80211_conn {
32 struct cfg80211_connect_params params;
33 /* these are sub-states of the _CONNECTING sme_state */
34 enum {
35 CFG80211_CONN_SCANNING,
36 CFG80211_CONN_SCAN_AGAIN,
37 CFG80211_CONN_AUTHENTICATE_NEXT,
38 CFG80211_CONN_AUTHENTICATING,
39 CFG80211_CONN_AUTH_FAILED_TIMEOUT,
40 CFG80211_CONN_ASSOCIATE_NEXT,
41 CFG80211_CONN_ASSOCIATING,
42 CFG80211_CONN_ASSOC_FAILED,
43 CFG80211_CONN_ASSOC_FAILED_TIMEOUT,
44 CFG80211_CONN_DEAUTH,
45 CFG80211_CONN_ABANDON,
46 CFG80211_CONN_CONNECTED,
47 } state;
48 u8 bssid[ETH_ALEN], prev_bssid[ETH_ALEN];
49 const u8 *ie;
50 size_t ie_len;
51 bool auto_auth, prev_bssid_valid;
52};
53
54static void cfg80211_sme_free(struct wireless_dev *wdev)
55{
56 if (!wdev->conn)
57 return;
58
59 kfree(wdev->conn->ie);
60 kfree(wdev->conn);
61 wdev->conn = NULL;
62}
63
64static int cfg80211_conn_scan(struct wireless_dev *wdev)
65{
66 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
67 struct cfg80211_scan_request *request;
68 int n_channels, err;
69
70 lockdep_assert_wiphy(wdev->wiphy);
71
72 if (rdev->scan_req || rdev->scan_msg)
73 return -EBUSY;
74
75 if (wdev->conn->params.channel)
76 n_channels = 1;
77 else
78 n_channels = ieee80211_get_num_supported_channels(wdev->wiphy);
79
80 request = kzalloc(sizeof(*request) + sizeof(request->ssids[0]) +
81 sizeof(request->channels[0]) * n_channels,
82 GFP_KERNEL);
83 if (!request)
84 return -ENOMEM;
85
86 request->n_channels = n_channels;
87 if (wdev->conn->params.channel) {
88 enum nl80211_band band = wdev->conn->params.channel->band;
89 struct ieee80211_supported_band *sband =
90 wdev->wiphy->bands[band];
91
92 if (!sband) {
93 kfree(request);
94 return -EINVAL;
95 }
96 request->channels[0] = wdev->conn->params.channel;
97 request->rates[band] = (1 << sband->n_bitrates) - 1;
98 } else {
99 int i = 0, j;
100 enum nl80211_band band;
101 struct ieee80211_supported_band *bands;
102 struct ieee80211_channel *channel;
103
104 for (band = 0; band < NUM_NL80211_BANDS; band++) {
105 bands = wdev->wiphy->bands[band];
106 if (!bands)
107 continue;
108 for (j = 0; j < bands->n_channels; j++) {
109 channel = &bands->channels[j];
110 if (channel->flags & IEEE80211_CHAN_DISABLED)
111 continue;
112 request->channels[i++] = channel;
113 }
114 request->rates[band] = (1 << bands->n_bitrates) - 1;
115 }
116 n_channels = i;
117 }
118 request->n_channels = n_channels;
119 request->ssids = (void *)request +
120 struct_size(request, channels, n_channels);
121 request->n_ssids = 1;
122
123 memcpy(request->ssids[0].ssid, wdev->conn->params.ssid,
124 wdev->conn->params.ssid_len);
125 request->ssids[0].ssid_len = wdev->conn->params.ssid_len;
126
127 eth_broadcast_addr(request->bssid);
128
129 request->wdev = wdev;
130 request->wiphy = &rdev->wiphy;
131 request->scan_start = jiffies;
132
133 rdev->scan_req = request;
134
135 err = cfg80211_scan(rdev);
136 if (!err) {
137 wdev->conn->state = CFG80211_CONN_SCANNING;
138 nl80211_send_scan_start(rdev, wdev);
139 dev_hold(wdev->netdev);
140 } else {
141 rdev->scan_req = NULL;
142 kfree(request);
143 }
144 return err;
145}
146
147static int cfg80211_conn_do_work(struct wireless_dev *wdev,
148 enum nl80211_timeout_reason *treason)
149{
150 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
151 struct cfg80211_connect_params *params;
152 struct cfg80211_auth_request auth_req = {};
153 struct cfg80211_assoc_request req = {};
154 int err;
155
156 lockdep_assert_wiphy(wdev->wiphy);
157
158 if (!wdev->conn)
159 return 0;
160
161 params = &wdev->conn->params;
162
163 switch (wdev->conn->state) {
164 case CFG80211_CONN_SCANNING:
165 /* didn't find it during scan ... */
166 return -ENOENT;
167 case CFG80211_CONN_SCAN_AGAIN:
168 return cfg80211_conn_scan(wdev);
169 case CFG80211_CONN_AUTHENTICATE_NEXT:
170 if (WARN_ON(!rdev->ops->auth))
171 return -EOPNOTSUPP;
172 wdev->conn->state = CFG80211_CONN_AUTHENTICATING;
173 auth_req.key = params->key;
174 auth_req.key_len = params->key_len;
175 auth_req.key_idx = params->key_idx;
176 auth_req.auth_type = params->auth_type;
177 auth_req.bss = cfg80211_get_bss(&rdev->wiphy, params->channel,
178 params->bssid,
179 params->ssid, params->ssid_len,
180 IEEE80211_BSS_TYPE_ESS,
181 IEEE80211_PRIVACY_ANY);
182 auth_req.link_id = -1;
183 err = cfg80211_mlme_auth(rdev, wdev->netdev, &auth_req);
184 cfg80211_put_bss(&rdev->wiphy, auth_req.bss);
185 return err;
186 case CFG80211_CONN_AUTH_FAILED_TIMEOUT:
187 *treason = NL80211_TIMEOUT_AUTH;
188 return -ENOTCONN;
189 case CFG80211_CONN_ASSOCIATE_NEXT:
190 if (WARN_ON(!rdev->ops->assoc))
191 return -EOPNOTSUPP;
192 wdev->conn->state = CFG80211_CONN_ASSOCIATING;
193 if (wdev->conn->prev_bssid_valid)
194 req.prev_bssid = wdev->conn->prev_bssid;
195 req.ie = params->ie;
196 req.ie_len = params->ie_len;
197 req.use_mfp = params->mfp != NL80211_MFP_NO;
198 req.crypto = params->crypto;
199 req.flags = params->flags;
200 req.ht_capa = params->ht_capa;
201 req.ht_capa_mask = params->ht_capa_mask;
202 req.vht_capa = params->vht_capa;
203 req.vht_capa_mask = params->vht_capa_mask;
204 req.link_id = -1;
205
206 req.bss = cfg80211_get_bss(&rdev->wiphy, params->channel,
207 params->bssid,
208 params->ssid, params->ssid_len,
209 IEEE80211_BSS_TYPE_ESS,
210 IEEE80211_PRIVACY_ANY);
211 if (!req.bss) {
212 err = -ENOENT;
213 } else {
214 err = cfg80211_mlme_assoc(rdev, wdev->netdev,
215 &req, NULL);
216 cfg80211_put_bss(&rdev->wiphy, req.bss);
217 }
218
219 if (err)
220 cfg80211_mlme_deauth(rdev, wdev->netdev, params->bssid,
221 NULL, 0,
222 WLAN_REASON_DEAUTH_LEAVING,
223 false);
224 return err;
225 case CFG80211_CONN_ASSOC_FAILED_TIMEOUT:
226 *treason = NL80211_TIMEOUT_ASSOC;
227 fallthrough;
228 case CFG80211_CONN_ASSOC_FAILED:
229 cfg80211_mlme_deauth(rdev, wdev->netdev, params->bssid,
230 NULL, 0,
231 WLAN_REASON_DEAUTH_LEAVING, false);
232 return -ENOTCONN;
233 case CFG80211_CONN_DEAUTH:
234 cfg80211_mlme_deauth(rdev, wdev->netdev, params->bssid,
235 NULL, 0,
236 WLAN_REASON_DEAUTH_LEAVING, false);
237 fallthrough;
238 case CFG80211_CONN_ABANDON:
239 /* free directly, disconnected event already sent */
240 cfg80211_sme_free(wdev);
241 return 0;
242 default:
243 return 0;
244 }
245}
246
247void cfg80211_conn_work(struct work_struct *work)
248{
249 struct cfg80211_registered_device *rdev =
250 container_of(work, struct cfg80211_registered_device, conn_work);
251 struct wireless_dev *wdev;
252 u8 bssid_buf[ETH_ALEN], *bssid = NULL;
253 enum nl80211_timeout_reason treason;
254
255 guard(wiphy)(&rdev->wiphy);
256
257 list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) {
258 if (!wdev->netdev)
259 continue;
260
261 if (!netif_running(wdev->netdev))
262 continue;
263
264 if (!wdev->conn ||
265 wdev->conn->state == CFG80211_CONN_CONNECTED)
266 continue;
267
268 if (wdev->conn->params.bssid) {
269 memcpy(bssid_buf, wdev->conn->params.bssid, ETH_ALEN);
270 bssid = bssid_buf;
271 }
272 treason = NL80211_TIMEOUT_UNSPECIFIED;
273 if (cfg80211_conn_do_work(wdev, &treason)) {
274 struct cfg80211_connect_resp_params cr;
275
276 memset(&cr, 0, sizeof(cr));
277 cr.status = -1;
278 cr.links[0].bssid = bssid;
279 cr.timeout_reason = treason;
280 __cfg80211_connect_result(wdev->netdev, &cr, false);
281 }
282 }
283}
284
285static void cfg80211_step_auth_next(struct cfg80211_conn *conn,
286 struct cfg80211_bss *bss)
287{
288 memcpy(conn->bssid, bss->bssid, ETH_ALEN);
289 conn->params.bssid = conn->bssid;
290 conn->params.channel = bss->channel;
291 conn->state = CFG80211_CONN_AUTHENTICATE_NEXT;
292}
293
294/* Returned bss is reference counted and must be cleaned up appropriately. */
295static struct cfg80211_bss *cfg80211_get_conn_bss(struct wireless_dev *wdev)
296{
297 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
298 struct cfg80211_bss *bss;
299
300 lockdep_assert_wiphy(wdev->wiphy);
301
302 bss = cfg80211_get_bss(wdev->wiphy, wdev->conn->params.channel,
303 wdev->conn->params.bssid,
304 wdev->conn->params.ssid,
305 wdev->conn->params.ssid_len,
306 wdev->conn_bss_type,
307 IEEE80211_PRIVACY(wdev->conn->params.privacy));
308 if (!bss)
309 return NULL;
310
311 cfg80211_step_auth_next(wdev->conn, bss);
312 schedule_work(&rdev->conn_work);
313
314 return bss;
315}
316
317void cfg80211_sme_scan_done(struct net_device *dev)
318{
319 struct wireless_dev *wdev = dev->ieee80211_ptr;
320 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
321 struct cfg80211_bss *bss;
322
323 lockdep_assert_wiphy(wdev->wiphy);
324
325 if (!wdev->conn)
326 return;
327
328 if (wdev->conn->state != CFG80211_CONN_SCANNING &&
329 wdev->conn->state != CFG80211_CONN_SCAN_AGAIN)
330 return;
331
332 bss = cfg80211_get_conn_bss(wdev);
333 if (bss)
334 cfg80211_put_bss(&rdev->wiphy, bss);
335 else
336 schedule_work(&rdev->conn_work);
337}
338
339void cfg80211_sme_rx_auth(struct wireless_dev *wdev, const u8 *buf, size_t len)
340{
341 struct wiphy *wiphy = wdev->wiphy;
342 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
343 struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)buf;
344 u16 status_code = le16_to_cpu(mgmt->u.auth.status_code);
345
346 lockdep_assert_wiphy(wdev->wiphy);
347
348 if (!wdev->conn || wdev->conn->state == CFG80211_CONN_CONNECTED)
349 return;
350
351 if (status_code == WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG &&
352 wdev->conn->auto_auth &&
353 wdev->conn->params.auth_type != NL80211_AUTHTYPE_NETWORK_EAP) {
354 /* select automatically between only open, shared, leap */
355 switch (wdev->conn->params.auth_type) {
356 case NL80211_AUTHTYPE_OPEN_SYSTEM:
357 if (wdev->connect_keys)
358 wdev->conn->params.auth_type =
359 NL80211_AUTHTYPE_SHARED_KEY;
360 else
361 wdev->conn->params.auth_type =
362 NL80211_AUTHTYPE_NETWORK_EAP;
363 break;
364 case NL80211_AUTHTYPE_SHARED_KEY:
365 wdev->conn->params.auth_type =
366 NL80211_AUTHTYPE_NETWORK_EAP;
367 break;
368 default:
369 /* huh? */
370 wdev->conn->params.auth_type =
371 NL80211_AUTHTYPE_OPEN_SYSTEM;
372 break;
373 }
374 wdev->conn->state = CFG80211_CONN_AUTHENTICATE_NEXT;
375 schedule_work(&rdev->conn_work);
376 } else if (status_code != WLAN_STATUS_SUCCESS) {
377 struct cfg80211_connect_resp_params cr;
378
379 memset(&cr, 0, sizeof(cr));
380 cr.status = status_code;
381 cr.links[0].bssid = mgmt->bssid;
382 cr.timeout_reason = NL80211_TIMEOUT_UNSPECIFIED;
383 __cfg80211_connect_result(wdev->netdev, &cr, false);
384 } else if (wdev->conn->state == CFG80211_CONN_AUTHENTICATING) {
385 wdev->conn->state = CFG80211_CONN_ASSOCIATE_NEXT;
386 schedule_work(&rdev->conn_work);
387 }
388}
389
390bool cfg80211_sme_rx_assoc_resp(struct wireless_dev *wdev, u16 status)
391{
392 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
393
394 if (!wdev->conn)
395 return false;
396
397 if (status == WLAN_STATUS_SUCCESS) {
398 wdev->conn->state = CFG80211_CONN_CONNECTED;
399 return false;
400 }
401
402 if (wdev->conn->prev_bssid_valid) {
403 /*
404 * Some stupid APs don't accept reassoc, so we
405 * need to fall back to trying regular assoc;
406 * return true so no event is sent to userspace.
407 */
408 wdev->conn->prev_bssid_valid = false;
409 wdev->conn->state = CFG80211_CONN_ASSOCIATE_NEXT;
410 schedule_work(&rdev->conn_work);
411 return true;
412 }
413
414 wdev->conn->state = CFG80211_CONN_ASSOC_FAILED;
415 schedule_work(&rdev->conn_work);
416 return false;
417}
418
419void cfg80211_sme_deauth(struct wireless_dev *wdev)
420{
421 cfg80211_sme_free(wdev);
422}
423
424void cfg80211_sme_auth_timeout(struct wireless_dev *wdev)
425{
426 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
427
428 if (!wdev->conn)
429 return;
430
431 wdev->conn->state = CFG80211_CONN_AUTH_FAILED_TIMEOUT;
432 schedule_work(&rdev->conn_work);
433}
434
435void cfg80211_sme_disassoc(struct wireless_dev *wdev)
436{
437 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
438
439 if (!wdev->conn)
440 return;
441
442 wdev->conn->state = CFG80211_CONN_DEAUTH;
443 schedule_work(&rdev->conn_work);
444}
445
446void cfg80211_sme_assoc_timeout(struct wireless_dev *wdev)
447{
448 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
449
450 if (!wdev->conn)
451 return;
452
453 wdev->conn->state = CFG80211_CONN_ASSOC_FAILED_TIMEOUT;
454 schedule_work(&rdev->conn_work);
455}
456
457void cfg80211_sme_abandon_assoc(struct wireless_dev *wdev)
458{
459 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
460
461 if (!wdev->conn)
462 return;
463
464 wdev->conn->state = CFG80211_CONN_ABANDON;
465 schedule_work(&rdev->conn_work);
466}
467
468static void cfg80211_wdev_release_bsses(struct wireless_dev *wdev)
469{
470 unsigned int link;
471
472 for_each_valid_link(wdev, link) {
473 if (!wdev->links[link].client.current_bss)
474 continue;
475 cfg80211_unhold_bss(wdev->links[link].client.current_bss);
476 cfg80211_put_bss(wdev->wiphy,
477 &wdev->links[link].client.current_bss->pub);
478 wdev->links[link].client.current_bss = NULL;
479 }
480}
481
482void cfg80211_wdev_release_link_bsses(struct wireless_dev *wdev, u16 link_mask)
483{
484 unsigned int link;
485
486 for_each_valid_link(wdev, link) {
487 if (!wdev->links[link].client.current_bss ||
488 !(link_mask & BIT(link)))
489 continue;
490 cfg80211_unhold_bss(wdev->links[link].client.current_bss);
491 cfg80211_put_bss(wdev->wiphy,
492 &wdev->links[link].client.current_bss->pub);
493 wdev->links[link].client.current_bss = NULL;
494 }
495}
496
497static int cfg80211_sme_get_conn_ies(struct wireless_dev *wdev,
498 const u8 *ies, size_t ies_len,
499 const u8 **out_ies, size_t *out_ies_len)
500{
501 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
502 u8 *buf;
503 size_t offs;
504
505 if (!rdev->wiphy.extended_capabilities_len ||
506 (ies && cfg80211_find_ie(WLAN_EID_EXT_CAPABILITY, ies, ies_len))) {
507 *out_ies = kmemdup(ies, ies_len, GFP_KERNEL);
508 if (!*out_ies)
509 return -ENOMEM;
510 *out_ies_len = ies_len;
511 return 0;
512 }
513
514 buf = kmalloc(ies_len + rdev->wiphy.extended_capabilities_len + 2,
515 GFP_KERNEL);
516 if (!buf)
517 return -ENOMEM;
518
519 if (ies_len) {
520 static const u8 before_extcapa[] = {
521 /* not listing IEs expected to be created by driver */
522 WLAN_EID_RSN,
523 WLAN_EID_QOS_CAPA,
524 WLAN_EID_RRM_ENABLED_CAPABILITIES,
525 WLAN_EID_MOBILITY_DOMAIN,
526 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
527 WLAN_EID_BSS_COEX_2040,
528 };
529
530 offs = ieee80211_ie_split(ies, ies_len, before_extcapa,
531 ARRAY_SIZE(before_extcapa), 0);
532 memcpy(buf, ies, offs);
533 /* leave a whole for extended capabilities IE */
534 memcpy(buf + offs + rdev->wiphy.extended_capabilities_len + 2,
535 ies + offs, ies_len - offs);
536 } else {
537 offs = 0;
538 }
539
540 /* place extended capabilities IE (with only driver capabilities) */
541 buf[offs] = WLAN_EID_EXT_CAPABILITY;
542 buf[offs + 1] = rdev->wiphy.extended_capabilities_len;
543 memcpy(buf + offs + 2,
544 rdev->wiphy.extended_capabilities,
545 rdev->wiphy.extended_capabilities_len);
546
547 *out_ies = buf;
548 *out_ies_len = ies_len + rdev->wiphy.extended_capabilities_len + 2;
549
550 return 0;
551}
552
553static int cfg80211_sme_connect(struct wireless_dev *wdev,
554 struct cfg80211_connect_params *connect,
555 const u8 *prev_bssid)
556{
557 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
558 struct cfg80211_bss *bss;
559 int err;
560
561 if (!rdev->ops->auth || !rdev->ops->assoc)
562 return -EOPNOTSUPP;
563
564 cfg80211_wdev_release_bsses(wdev);
565
566 if (wdev->connected) {
567 cfg80211_sme_free(wdev);
568 wdev->connected = false;
569 }
570
571 if (wdev->conn)
572 return -EINPROGRESS;
573
574 wdev->conn = kzalloc(sizeof(*wdev->conn), GFP_KERNEL);
575 if (!wdev->conn)
576 return -ENOMEM;
577
578 /*
579 * Copy all parameters, and treat explicitly IEs, BSSID, SSID.
580 */
581 memcpy(&wdev->conn->params, connect, sizeof(*connect));
582 if (connect->bssid) {
583 wdev->conn->params.bssid = wdev->conn->bssid;
584 memcpy(wdev->conn->bssid, connect->bssid, ETH_ALEN);
585 }
586
587 if (cfg80211_sme_get_conn_ies(wdev, connect->ie, connect->ie_len,
588 &wdev->conn->ie,
589 &wdev->conn->params.ie_len)) {
590 kfree(wdev->conn);
591 wdev->conn = NULL;
592 return -ENOMEM;
593 }
594 wdev->conn->params.ie = wdev->conn->ie;
595
596 if (connect->auth_type == NL80211_AUTHTYPE_AUTOMATIC) {
597 wdev->conn->auto_auth = true;
598 /* start with open system ... should mostly work */
599 wdev->conn->params.auth_type =
600 NL80211_AUTHTYPE_OPEN_SYSTEM;
601 } else {
602 wdev->conn->auto_auth = false;
603 }
604
605 wdev->conn->params.ssid = wdev->u.client.ssid;
606 wdev->conn->params.ssid_len = wdev->u.client.ssid_len;
607
608 /* see if we have the bss already */
609 bss = cfg80211_get_bss(wdev->wiphy, wdev->conn->params.channel,
610 wdev->conn->params.bssid,
611 wdev->conn->params.ssid,
612 wdev->conn->params.ssid_len,
613 wdev->conn_bss_type,
614 IEEE80211_PRIVACY(wdev->conn->params.privacy));
615
616 if (prev_bssid) {
617 memcpy(wdev->conn->prev_bssid, prev_bssid, ETH_ALEN);
618 wdev->conn->prev_bssid_valid = true;
619 }
620
621 /* we're good if we have a matching bss struct */
622 if (bss) {
623 enum nl80211_timeout_reason treason;
624
625 cfg80211_step_auth_next(wdev->conn, bss);
626 err = cfg80211_conn_do_work(wdev, &treason);
627 cfg80211_put_bss(wdev->wiphy, bss);
628 } else {
629 /* otherwise we'll need to scan for the AP first */
630 err = cfg80211_conn_scan(wdev);
631
632 /*
633 * If we can't scan right now, then we need to scan again
634 * after the current scan finished, since the parameters
635 * changed (unless we find a good AP anyway).
636 */
637 if (err == -EBUSY) {
638 err = 0;
639 wdev->conn->state = CFG80211_CONN_SCAN_AGAIN;
640 }
641 }
642
643 if (err)
644 cfg80211_sme_free(wdev);
645
646 return err;
647}
648
649static int cfg80211_sme_disconnect(struct wireless_dev *wdev, u16 reason)
650{
651 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
652 int err;
653
654 if (!wdev->conn)
655 return 0;
656
657 if (!rdev->ops->deauth)
658 return -EOPNOTSUPP;
659
660 if (wdev->conn->state == CFG80211_CONN_SCANNING ||
661 wdev->conn->state == CFG80211_CONN_SCAN_AGAIN) {
662 err = 0;
663 goto out;
664 }
665
666 /* wdev->conn->params.bssid must be set if > SCANNING */
667 err = cfg80211_mlme_deauth(rdev, wdev->netdev,
668 wdev->conn->params.bssid,
669 NULL, 0, reason, false);
670 out:
671 cfg80211_sme_free(wdev);
672 return err;
673}
674
675/*
676 * code shared for in-device and software SME
677 */
678
679static bool cfg80211_is_all_idle(void)
680{
681 struct cfg80211_registered_device *rdev;
682 struct wireless_dev *wdev;
683 bool is_all_idle = true;
684
685 /*
686 * All devices must be idle as otherwise if you are actively
687 * scanning some new beacon hints could be learned and would
688 * count as new regulatory hints.
689 * Also if there is any other active beaconing interface we
690 * need not issue a disconnect hint and reset any info such
691 * as chan dfs state, etc.
692 */
693 for_each_rdev(rdev) {
694 guard(wiphy)(&rdev->wiphy);
695
696 list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) {
697 if (wdev->conn || wdev->connected ||
698 cfg80211_beaconing_iface_active(wdev))
699 is_all_idle = false;
700 }
701 }
702
703 return is_all_idle;
704}
705
706static void disconnect_work(struct work_struct *work)
707{
708 rtnl_lock();
709 if (cfg80211_is_all_idle())
710 regulatory_hint_disconnect();
711 rtnl_unlock();
712}
713
714DECLARE_WORK(cfg80211_disconnect_work, disconnect_work);
715
716static void
717cfg80211_connect_result_release_bsses(struct wireless_dev *wdev,
718 struct cfg80211_connect_resp_params *cr)
719{
720 unsigned int link;
721
722 for_each_valid_link(cr, link) {
723 if (!cr->links[link].bss)
724 continue;
725 cfg80211_unhold_bss(bss_from_pub(cr->links[link].bss));
726 cfg80211_put_bss(wdev->wiphy, cr->links[link].bss);
727 }
728}
729
730/*
731 * API calls for drivers implementing connect/disconnect and
732 * SME event handling
733 */
734
735/* This method must consume bss one way or another */
736void __cfg80211_connect_result(struct net_device *dev,
737 struct cfg80211_connect_resp_params *cr,
738 bool wextev)
739{
740 struct wireless_dev *wdev = dev->ieee80211_ptr;
741 const struct element *country_elem = NULL;
742 const struct element *ssid;
743 const u8 *country_data;
744 u8 country_datalen;
745#ifdef CONFIG_CFG80211_WEXT
746 union iwreq_data wrqu;
747#endif
748 unsigned int link;
749 const u8 *connected_addr;
750 bool bss_not_found = false;
751
752 lockdep_assert_wiphy(wdev->wiphy);
753
754 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION &&
755 wdev->iftype != NL80211_IFTYPE_P2P_CLIENT))
756 goto out;
757
758 if (cr->valid_links) {
759 if (WARN_ON(!cr->ap_mld_addr))
760 goto out;
761
762 for_each_valid_link(cr, link) {
763 if (WARN_ON(!cr->links[link].addr))
764 goto out;
765 }
766
767 if (WARN_ON(wdev->connect_keys))
768 goto out;
769 }
770
771 wdev->unprot_beacon_reported = 0;
772 nl80211_send_connect_result(wiphy_to_rdev(wdev->wiphy), dev, cr,
773 GFP_KERNEL);
774 connected_addr = cr->valid_links ? cr->ap_mld_addr : cr->links[0].bssid;
775
776#ifdef CONFIG_CFG80211_WEXT
777 if (wextev && !cr->valid_links) {
778 if (cr->req_ie && cr->status == WLAN_STATUS_SUCCESS) {
779 memset(&wrqu, 0, sizeof(wrqu));
780 wrqu.data.length = cr->req_ie_len;
781 wireless_send_event(dev, IWEVASSOCREQIE, &wrqu,
782 cr->req_ie);
783 }
784
785 if (cr->resp_ie && cr->status == WLAN_STATUS_SUCCESS) {
786 memset(&wrqu, 0, sizeof(wrqu));
787 wrqu.data.length = cr->resp_ie_len;
788 wireless_send_event(dev, IWEVASSOCRESPIE, &wrqu,
789 cr->resp_ie);
790 }
791
792 memset(&wrqu, 0, sizeof(wrqu));
793 wrqu.ap_addr.sa_family = ARPHRD_ETHER;
794 if (connected_addr && cr->status == WLAN_STATUS_SUCCESS) {
795 memcpy(wrqu.ap_addr.sa_data, connected_addr, ETH_ALEN);
796 memcpy(wdev->wext.prev_bssid, connected_addr, ETH_ALEN);
797 wdev->wext.prev_bssid_valid = true;
798 }
799 wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL);
800 }
801#endif
802
803 if (cr->status == WLAN_STATUS_SUCCESS) {
804 if (!wiphy_to_rdev(wdev->wiphy)->ops->connect) {
805 for_each_valid_link(cr, link) {
806 if (WARN_ON_ONCE(!cr->links[link].bss))
807 break;
808 }
809 }
810
811 for_each_valid_link(cr, link) {
812 /* don't do extra lookups for failures */
813 if (cr->links[link].status != WLAN_STATUS_SUCCESS)
814 continue;
815
816 if (cr->links[link].bss)
817 continue;
818
819 cr->links[link].bss =
820 cfg80211_get_bss(wdev->wiphy, NULL,
821 cr->links[link].bssid,
822 wdev->u.client.ssid,
823 wdev->u.client.ssid_len,
824 wdev->conn_bss_type,
825 IEEE80211_PRIVACY_ANY);
826 if (!cr->links[link].bss) {
827 bss_not_found = true;
828 break;
829 }
830 cfg80211_hold_bss(bss_from_pub(cr->links[link].bss));
831 }
832 }
833
834 cfg80211_wdev_release_bsses(wdev);
835
836 if (cr->status != WLAN_STATUS_SUCCESS) {
837 kfree_sensitive(wdev->connect_keys);
838 wdev->connect_keys = NULL;
839 wdev->u.client.ssid_len = 0;
840 wdev->conn_owner_nlportid = 0;
841 cfg80211_connect_result_release_bsses(wdev, cr);
842 cfg80211_sme_free(wdev);
843 return;
844 }
845
846 if (WARN_ON(bss_not_found)) {
847 cfg80211_connect_result_release_bsses(wdev, cr);
848 return;
849 }
850
851 memset(wdev->links, 0, sizeof(wdev->links));
852 for_each_valid_link(cr, link) {
853 if (cr->links[link].status == WLAN_STATUS_SUCCESS)
854 continue;
855 cr->valid_links &= ~BIT(link);
856 /* don't require bss pointer for failed links */
857 if (!cr->links[link].bss)
858 continue;
859 cfg80211_unhold_bss(bss_from_pub(cr->links[link].bss));
860 cfg80211_put_bss(wdev->wiphy, cr->links[link].bss);
861 }
862 wdev->valid_links = cr->valid_links;
863 for_each_valid_link(cr, link)
864 wdev->links[link].client.current_bss =
865 bss_from_pub(cr->links[link].bss);
866 wdev->connected = true;
867 ether_addr_copy(wdev->u.client.connected_addr, connected_addr);
868 if (cr->valid_links) {
869 for_each_valid_link(cr, link)
870 memcpy(wdev->links[link].addr, cr->links[link].addr,
871 ETH_ALEN);
872 }
873
874 cfg80211_upload_connect_keys(wdev);
875
876 rcu_read_lock();
877 for_each_valid_link(cr, link) {
878 country_elem =
879 ieee80211_bss_get_elem(cr->links[link].bss,
880 WLAN_EID_COUNTRY);
881 if (country_elem)
882 break;
883 }
884 if (!country_elem) {
885 rcu_read_unlock();
886 return;
887 }
888
889 country_datalen = country_elem->datalen;
890 country_data = kmemdup(country_elem->data, country_datalen, GFP_ATOMIC);
891 rcu_read_unlock();
892
893 if (!country_data)
894 return;
895
896 regulatory_hint_country_ie(wdev->wiphy,
897 cr->links[link].bss->channel->band,
898 country_data, country_datalen);
899 kfree(country_data);
900
901 if (!wdev->u.client.ssid_len) {
902 rcu_read_lock();
903 for_each_valid_link(cr, link) {
904 ssid = ieee80211_bss_get_elem(cr->links[link].bss,
905 WLAN_EID_SSID);
906
907 if (!ssid || !ssid->datalen)
908 continue;
909
910 memcpy(wdev->u.client.ssid, ssid->data, ssid->datalen);
911 wdev->u.client.ssid_len = ssid->datalen;
912 break;
913 }
914 rcu_read_unlock();
915 }
916
917 return;
918out:
919 for_each_valid_link(cr, link)
920 cfg80211_put_bss(wdev->wiphy, cr->links[link].bss);
921}
922
923static void cfg80211_update_link_bss(struct wireless_dev *wdev,
924 struct cfg80211_bss **bss)
925{
926 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
927 struct cfg80211_internal_bss *ibss;
928
929 if (!*bss)
930 return;
931
932 ibss = bss_from_pub(*bss);
933 if (list_empty(&ibss->list)) {
934 struct cfg80211_bss *found = NULL, *tmp = *bss;
935
936 found = cfg80211_get_bss(wdev->wiphy, NULL,
937 (*bss)->bssid,
938 wdev->u.client.ssid,
939 wdev->u.client.ssid_len,
940 wdev->conn_bss_type,
941 IEEE80211_PRIVACY_ANY);
942 if (found) {
943 /* The same BSS is already updated so use it
944 * instead, as it has latest info.
945 */
946 *bss = found;
947 } else {
948 /* Update with BSS provided by driver, it will
949 * be freshly added and ref cnted, we can free
950 * the old one.
951 *
952 * signal_valid can be false, as we are not
953 * expecting the BSS to be found.
954 *
955 * keep the old timestamp to avoid confusion
956 */
957 cfg80211_bss_update(rdev, ibss, false,
958 ibss->ts);
959 }
960
961 cfg80211_put_bss(wdev->wiphy, tmp);
962 }
963}
964
965/* Consumes bss object(s) one way or another */
966void cfg80211_connect_done(struct net_device *dev,
967 struct cfg80211_connect_resp_params *params,
968 gfp_t gfp)
969{
970 struct wireless_dev *wdev = dev->ieee80211_ptr;
971 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
972 struct cfg80211_event *ev;
973 unsigned long flags;
974 u8 *next;
975 size_t link_info_size = 0;
976 unsigned int link;
977
978 for_each_valid_link(params, link) {
979 cfg80211_update_link_bss(wdev, &params->links[link].bss);
980 link_info_size += params->links[link].bssid ? ETH_ALEN : 0;
981 link_info_size += params->links[link].addr ? ETH_ALEN : 0;
982 }
983
984 ev = kzalloc(sizeof(*ev) + (params->ap_mld_addr ? ETH_ALEN : 0) +
985 params->req_ie_len + params->resp_ie_len +
986 params->fils.kek_len + params->fils.pmk_len +
987 (params->fils.pmkid ? WLAN_PMKID_LEN : 0) + link_info_size,
988 gfp);
989
990 if (!ev) {
991 for_each_valid_link(params, link)
992 cfg80211_put_bss(wdev->wiphy,
993 params->links[link].bss);
994 return;
995 }
996
997 ev->type = EVENT_CONNECT_RESULT;
998 next = ((u8 *)ev) + sizeof(*ev);
999 if (params->ap_mld_addr) {
1000 ev->cr.ap_mld_addr = next;
1001 memcpy((void *)ev->cr.ap_mld_addr, params->ap_mld_addr,
1002 ETH_ALEN);
1003 next += ETH_ALEN;
1004 }
1005 if (params->req_ie_len) {
1006 ev->cr.req_ie = next;
1007 ev->cr.req_ie_len = params->req_ie_len;
1008 memcpy((void *)ev->cr.req_ie, params->req_ie,
1009 params->req_ie_len);
1010 next += params->req_ie_len;
1011 }
1012 if (params->resp_ie_len) {
1013 ev->cr.resp_ie = next;
1014 ev->cr.resp_ie_len = params->resp_ie_len;
1015 memcpy((void *)ev->cr.resp_ie, params->resp_ie,
1016 params->resp_ie_len);
1017 next += params->resp_ie_len;
1018 }
1019 if (params->fils.kek_len) {
1020 ev->cr.fils.kek = next;
1021 ev->cr.fils.kek_len = params->fils.kek_len;
1022 memcpy((void *)ev->cr.fils.kek, params->fils.kek,
1023 params->fils.kek_len);
1024 next += params->fils.kek_len;
1025 }
1026 if (params->fils.pmk_len) {
1027 ev->cr.fils.pmk = next;
1028 ev->cr.fils.pmk_len = params->fils.pmk_len;
1029 memcpy((void *)ev->cr.fils.pmk, params->fils.pmk,
1030 params->fils.pmk_len);
1031 next += params->fils.pmk_len;
1032 }
1033 if (params->fils.pmkid) {
1034 ev->cr.fils.pmkid = next;
1035 memcpy((void *)ev->cr.fils.pmkid, params->fils.pmkid,
1036 WLAN_PMKID_LEN);
1037 next += WLAN_PMKID_LEN;
1038 }
1039 ev->cr.fils.update_erp_next_seq_num = params->fils.update_erp_next_seq_num;
1040 if (params->fils.update_erp_next_seq_num)
1041 ev->cr.fils.erp_next_seq_num = params->fils.erp_next_seq_num;
1042 ev->cr.valid_links = params->valid_links;
1043 for_each_valid_link(params, link) {
1044 if (params->links[link].bss)
1045 cfg80211_hold_bss(
1046 bss_from_pub(params->links[link].bss));
1047 ev->cr.links[link].bss = params->links[link].bss;
1048 ev->cr.links[link].status = params->links[link].status;
1049
1050 if (params->links[link].addr) {
1051 ev->cr.links[link].addr = next;
1052 memcpy((void *)ev->cr.links[link].addr,
1053 params->links[link].addr,
1054 ETH_ALEN);
1055 next += ETH_ALEN;
1056 }
1057 if (params->links[link].bssid) {
1058 ev->cr.links[link].bssid = next;
1059 memcpy((void *)ev->cr.links[link].bssid,
1060 params->links[link].bssid,
1061 ETH_ALEN);
1062 next += ETH_ALEN;
1063 }
1064 }
1065 ev->cr.status = params->status;
1066 ev->cr.timeout_reason = params->timeout_reason;
1067
1068 spin_lock_irqsave(&wdev->event_lock, flags);
1069 list_add_tail(&ev->list, &wdev->event_list);
1070 spin_unlock_irqrestore(&wdev->event_lock, flags);
1071 queue_work(cfg80211_wq, &rdev->event_work);
1072}
1073EXPORT_SYMBOL(cfg80211_connect_done);
1074
1075/* Consumes bss object one way or another */
1076void __cfg80211_roamed(struct wireless_dev *wdev,
1077 struct cfg80211_roam_info *info)
1078{
1079#ifdef CONFIG_CFG80211_WEXT
1080 union iwreq_data wrqu;
1081#endif
1082 unsigned int link;
1083 const u8 *connected_addr;
1084
1085 lockdep_assert_wiphy(wdev->wiphy);
1086
1087 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION &&
1088 wdev->iftype != NL80211_IFTYPE_P2P_CLIENT))
1089 goto out;
1090
1091 if (WARN_ON(!wdev->connected))
1092 goto out;
1093
1094 if (info->valid_links) {
1095 if (WARN_ON(!info->ap_mld_addr))
1096 goto out;
1097
1098 for_each_valid_link(info, link) {
1099 if (WARN_ON(!info->links[link].addr))
1100 goto out;
1101 }
1102 }
1103
1104 cfg80211_wdev_release_bsses(wdev);
1105
1106 for_each_valid_link(info, link) {
1107 if (WARN_ON(!info->links[link].bss))
1108 goto out;
1109 }
1110
1111 memset(wdev->links, 0, sizeof(wdev->links));
1112 wdev->valid_links = info->valid_links;
1113 for_each_valid_link(info, link) {
1114 cfg80211_hold_bss(bss_from_pub(info->links[link].bss));
1115 wdev->links[link].client.current_bss =
1116 bss_from_pub(info->links[link].bss);
1117 }
1118
1119 connected_addr = info->valid_links ?
1120 info->ap_mld_addr :
1121 info->links[0].bss->bssid;
1122 ether_addr_copy(wdev->u.client.connected_addr, connected_addr);
1123 if (info->valid_links) {
1124 for_each_valid_link(info, link)
1125 memcpy(wdev->links[link].addr, info->links[link].addr,
1126 ETH_ALEN);
1127 }
1128 wdev->unprot_beacon_reported = 0;
1129 nl80211_send_roamed(wiphy_to_rdev(wdev->wiphy),
1130 wdev->netdev, info, GFP_KERNEL);
1131
1132#ifdef CONFIG_CFG80211_WEXT
1133 if (!info->valid_links) {
1134 if (info->req_ie) {
1135 memset(&wrqu, 0, sizeof(wrqu));
1136 wrqu.data.length = info->req_ie_len;
1137 wireless_send_event(wdev->netdev, IWEVASSOCREQIE,
1138 &wrqu, info->req_ie);
1139 }
1140
1141 if (info->resp_ie) {
1142 memset(&wrqu, 0, sizeof(wrqu));
1143 wrqu.data.length = info->resp_ie_len;
1144 wireless_send_event(wdev->netdev, IWEVASSOCRESPIE,
1145 &wrqu, info->resp_ie);
1146 }
1147
1148 memset(&wrqu, 0, sizeof(wrqu));
1149 wrqu.ap_addr.sa_family = ARPHRD_ETHER;
1150 memcpy(wrqu.ap_addr.sa_data, connected_addr, ETH_ALEN);
1151 memcpy(wdev->wext.prev_bssid, connected_addr, ETH_ALEN);
1152 wdev->wext.prev_bssid_valid = true;
1153 wireless_send_event(wdev->netdev, SIOCGIWAP, &wrqu, NULL);
1154 }
1155#endif
1156
1157 return;
1158out:
1159 for_each_valid_link(info, link)
1160 cfg80211_put_bss(wdev->wiphy, info->links[link].bss);
1161}
1162
1163/* Consumes info->links.bss object(s) one way or another */
1164void cfg80211_roamed(struct net_device *dev, struct cfg80211_roam_info *info,
1165 gfp_t gfp)
1166{
1167 struct wireless_dev *wdev = dev->ieee80211_ptr;
1168 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
1169 struct cfg80211_event *ev;
1170 unsigned long flags;
1171 u8 *next;
1172 unsigned int link;
1173 size_t link_info_size = 0;
1174 bool bss_not_found = false;
1175
1176 for_each_valid_link(info, link) {
1177 link_info_size += info->links[link].addr ? ETH_ALEN : 0;
1178 link_info_size += info->links[link].bssid ? ETH_ALEN : 0;
1179
1180 if (info->links[link].bss)
1181 continue;
1182
1183 info->links[link].bss =
1184 cfg80211_get_bss(wdev->wiphy,
1185 info->links[link].channel,
1186 info->links[link].bssid,
1187 wdev->u.client.ssid,
1188 wdev->u.client.ssid_len,
1189 wdev->conn_bss_type,
1190 IEEE80211_PRIVACY_ANY);
1191
1192 if (!info->links[link].bss) {
1193 bss_not_found = true;
1194 break;
1195 }
1196 }
1197
1198 if (WARN_ON(bss_not_found))
1199 goto out;
1200
1201 ev = kzalloc(sizeof(*ev) + info->req_ie_len + info->resp_ie_len +
1202 info->fils.kek_len + info->fils.pmk_len +
1203 (info->fils.pmkid ? WLAN_PMKID_LEN : 0) +
1204 (info->ap_mld_addr ? ETH_ALEN : 0) + link_info_size, gfp);
1205 if (!ev)
1206 goto out;
1207
1208 ev->type = EVENT_ROAMED;
1209 next = ((u8 *)ev) + sizeof(*ev);
1210 if (info->req_ie_len) {
1211 ev->rm.req_ie = next;
1212 ev->rm.req_ie_len = info->req_ie_len;
1213 memcpy((void *)ev->rm.req_ie, info->req_ie, info->req_ie_len);
1214 next += info->req_ie_len;
1215 }
1216 if (info->resp_ie_len) {
1217 ev->rm.resp_ie = next;
1218 ev->rm.resp_ie_len = info->resp_ie_len;
1219 memcpy((void *)ev->rm.resp_ie, info->resp_ie,
1220 info->resp_ie_len);
1221 next += info->resp_ie_len;
1222 }
1223 if (info->fils.kek_len) {
1224 ev->rm.fils.kek = next;
1225 ev->rm.fils.kek_len = info->fils.kek_len;
1226 memcpy((void *)ev->rm.fils.kek, info->fils.kek,
1227 info->fils.kek_len);
1228 next += info->fils.kek_len;
1229 }
1230 if (info->fils.pmk_len) {
1231 ev->rm.fils.pmk = next;
1232 ev->rm.fils.pmk_len = info->fils.pmk_len;
1233 memcpy((void *)ev->rm.fils.pmk, info->fils.pmk,
1234 info->fils.pmk_len);
1235 next += info->fils.pmk_len;
1236 }
1237 if (info->fils.pmkid) {
1238 ev->rm.fils.pmkid = next;
1239 memcpy((void *)ev->rm.fils.pmkid, info->fils.pmkid,
1240 WLAN_PMKID_LEN);
1241 next += WLAN_PMKID_LEN;
1242 }
1243 ev->rm.fils.update_erp_next_seq_num = info->fils.update_erp_next_seq_num;
1244 if (info->fils.update_erp_next_seq_num)
1245 ev->rm.fils.erp_next_seq_num = info->fils.erp_next_seq_num;
1246 if (info->ap_mld_addr) {
1247 ev->rm.ap_mld_addr = next;
1248 memcpy((void *)ev->rm.ap_mld_addr, info->ap_mld_addr,
1249 ETH_ALEN);
1250 next += ETH_ALEN;
1251 }
1252 ev->rm.valid_links = info->valid_links;
1253 for_each_valid_link(info, link) {
1254 ev->rm.links[link].bss = info->links[link].bss;
1255
1256 if (info->links[link].addr) {
1257 ev->rm.links[link].addr = next;
1258 memcpy((void *)ev->rm.links[link].addr,
1259 info->links[link].addr,
1260 ETH_ALEN);
1261 next += ETH_ALEN;
1262 }
1263
1264 if (info->links[link].bssid) {
1265 ev->rm.links[link].bssid = next;
1266 memcpy((void *)ev->rm.links[link].bssid,
1267 info->links[link].bssid,
1268 ETH_ALEN);
1269 next += ETH_ALEN;
1270 }
1271 }
1272
1273 spin_lock_irqsave(&wdev->event_lock, flags);
1274 list_add_tail(&ev->list, &wdev->event_list);
1275 spin_unlock_irqrestore(&wdev->event_lock, flags);
1276 queue_work(cfg80211_wq, &rdev->event_work);
1277
1278 return;
1279out:
1280 for_each_valid_link(info, link)
1281 cfg80211_put_bss(wdev->wiphy, info->links[link].bss);
1282
1283}
1284EXPORT_SYMBOL(cfg80211_roamed);
1285
1286void __cfg80211_port_authorized(struct wireless_dev *wdev, const u8 *peer_addr,
1287 const u8 *td_bitmap, u8 td_bitmap_len)
1288{
1289 lockdep_assert_wiphy(wdev->wiphy);
1290
1291 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION &&
1292 wdev->iftype != NL80211_IFTYPE_P2P_CLIENT &&
1293 wdev->iftype != NL80211_IFTYPE_AP &&
1294 wdev->iftype != NL80211_IFTYPE_P2P_GO))
1295 return;
1296
1297 if (wdev->iftype == NL80211_IFTYPE_STATION ||
1298 wdev->iftype == NL80211_IFTYPE_P2P_CLIENT) {
1299 if (WARN_ON(!wdev->connected) ||
1300 WARN_ON(!ether_addr_equal(wdev->u.client.connected_addr, peer_addr)))
1301 return;
1302 }
1303
1304 nl80211_send_port_authorized(wiphy_to_rdev(wdev->wiphy), wdev->netdev,
1305 peer_addr, td_bitmap, td_bitmap_len);
1306}
1307
1308void cfg80211_port_authorized(struct net_device *dev, const u8 *peer_addr,
1309 const u8 *td_bitmap, u8 td_bitmap_len, gfp_t gfp)
1310{
1311 struct wireless_dev *wdev = dev->ieee80211_ptr;
1312 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
1313 struct cfg80211_event *ev;
1314 unsigned long flags;
1315
1316 if (WARN_ON(!peer_addr))
1317 return;
1318
1319 ev = kzalloc(sizeof(*ev) + td_bitmap_len, gfp);
1320 if (!ev)
1321 return;
1322
1323 ev->type = EVENT_PORT_AUTHORIZED;
1324 memcpy(ev->pa.peer_addr, peer_addr, ETH_ALEN);
1325 ev->pa.td_bitmap = ((u8 *)ev) + sizeof(*ev);
1326 ev->pa.td_bitmap_len = td_bitmap_len;
1327 memcpy((void *)ev->pa.td_bitmap, td_bitmap, td_bitmap_len);
1328
1329 /*
1330 * Use the wdev event list so that if there are pending
1331 * connected/roamed events, they will be reported first.
1332 */
1333 spin_lock_irqsave(&wdev->event_lock, flags);
1334 list_add_tail(&ev->list, &wdev->event_list);
1335 spin_unlock_irqrestore(&wdev->event_lock, flags);
1336 queue_work(cfg80211_wq, &rdev->event_work);
1337}
1338EXPORT_SYMBOL(cfg80211_port_authorized);
1339
1340void __cfg80211_disconnected(struct net_device *dev, const u8 *ie,
1341 size_t ie_len, u16 reason, bool from_ap)
1342{
1343 struct wireless_dev *wdev = dev->ieee80211_ptr;
1344 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
1345 int i;
1346#ifdef CONFIG_CFG80211_WEXT
1347 union iwreq_data wrqu;
1348#endif
1349
1350 lockdep_assert_wiphy(wdev->wiphy);
1351
1352 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION &&
1353 wdev->iftype != NL80211_IFTYPE_P2P_CLIENT))
1354 return;
1355
1356 cfg80211_wdev_release_bsses(wdev);
1357 wdev->valid_links = 0;
1358 wdev->connected = false;
1359 wdev->u.client.ssid_len = 0;
1360 wdev->conn_owner_nlportid = 0;
1361 kfree_sensitive(wdev->connect_keys);
1362 wdev->connect_keys = NULL;
1363
1364 nl80211_send_disconnected(rdev, dev, reason, ie, ie_len, from_ap);
1365
1366 /* stop critical protocol if supported */
1367 if (rdev->ops->crit_proto_stop && rdev->crit_proto_nlportid) {
1368 rdev->crit_proto_nlportid = 0;
1369 rdev_crit_proto_stop(rdev, wdev);
1370 }
1371
1372 /*
1373 * Delete all the keys ... pairwise keys can't really
1374 * exist any more anyway, but default keys might.
1375 */
1376 if (rdev->ops->del_key) {
1377 int max_key_idx = 5;
1378
1379 if (wiphy_ext_feature_isset(
1380 wdev->wiphy,
1381 NL80211_EXT_FEATURE_BEACON_PROTECTION) ||
1382 wiphy_ext_feature_isset(
1383 wdev->wiphy,
1384 NL80211_EXT_FEATURE_BEACON_PROTECTION_CLIENT))
1385 max_key_idx = 7;
1386 for (i = 0; i <= max_key_idx; i++)
1387 rdev_del_key(rdev, dev, -1, i, false, NULL);
1388 }
1389
1390 rdev_set_qos_map(rdev, dev, NULL);
1391
1392#ifdef CONFIG_CFG80211_WEXT
1393 memset(&wrqu, 0, sizeof(wrqu));
1394 wrqu.ap_addr.sa_family = ARPHRD_ETHER;
1395 wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL);
1396 wdev->wext.connect.ssid_len = 0;
1397#endif
1398
1399 schedule_work(&cfg80211_disconnect_work);
1400
1401 cfg80211_schedule_channels_check(wdev);
1402}
1403
1404void cfg80211_disconnected(struct net_device *dev, u16 reason,
1405 const u8 *ie, size_t ie_len,
1406 bool locally_generated, gfp_t gfp)
1407{
1408 struct wireless_dev *wdev = dev->ieee80211_ptr;
1409 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
1410 struct cfg80211_event *ev;
1411 unsigned long flags;
1412
1413 ev = kzalloc(sizeof(*ev) + ie_len, gfp);
1414 if (!ev)
1415 return;
1416
1417 ev->type = EVENT_DISCONNECTED;
1418 ev->dc.ie = ((u8 *)ev) + sizeof(*ev);
1419 ev->dc.ie_len = ie_len;
1420 memcpy((void *)ev->dc.ie, ie, ie_len);
1421 ev->dc.reason = reason;
1422 ev->dc.locally_generated = locally_generated;
1423
1424 spin_lock_irqsave(&wdev->event_lock, flags);
1425 list_add_tail(&ev->list, &wdev->event_list);
1426 spin_unlock_irqrestore(&wdev->event_lock, flags);
1427 queue_work(cfg80211_wq, &rdev->event_work);
1428}
1429EXPORT_SYMBOL(cfg80211_disconnected);
1430
1431/*
1432 * API calls for nl80211/wext compatibility code
1433 */
1434int cfg80211_connect(struct cfg80211_registered_device *rdev,
1435 struct net_device *dev,
1436 struct cfg80211_connect_params *connect,
1437 struct cfg80211_cached_keys *connkeys,
1438 const u8 *prev_bssid)
1439{
1440 struct wireless_dev *wdev = dev->ieee80211_ptr;
1441 int err;
1442
1443 lockdep_assert_wiphy(wdev->wiphy);
1444
1445 /*
1446 * If we have an ssid_len, we're trying to connect or are
1447 * already connected, so reject a new SSID unless it's the
1448 * same (which is the case for re-association.)
1449 */
1450 if (wdev->u.client.ssid_len &&
1451 (wdev->u.client.ssid_len != connect->ssid_len ||
1452 memcmp(wdev->u.client.ssid, connect->ssid, wdev->u.client.ssid_len)))
1453 return -EALREADY;
1454
1455 /*
1456 * If connected, reject (re-)association unless prev_bssid
1457 * matches the current BSSID.
1458 */
1459 if (wdev->connected) {
1460 if (!prev_bssid)
1461 return -EALREADY;
1462 if (!ether_addr_equal(prev_bssid,
1463 wdev->u.client.connected_addr))
1464 return -ENOTCONN;
1465 }
1466
1467 /*
1468 * Reject if we're in the process of connecting with WEP,
1469 * this case isn't very interesting and trying to handle
1470 * it would make the code much more complex.
1471 */
1472 if (wdev->connect_keys)
1473 return -EINPROGRESS;
1474
1475 cfg80211_oper_and_ht_capa(&connect->ht_capa_mask,
1476 rdev->wiphy.ht_capa_mod_mask);
1477 cfg80211_oper_and_vht_capa(&connect->vht_capa_mask,
1478 rdev->wiphy.vht_capa_mod_mask);
1479
1480 if (connkeys && connkeys->def >= 0) {
1481 int idx;
1482 u32 cipher;
1483
1484 idx = connkeys->def;
1485 cipher = connkeys->params[idx].cipher;
1486 /* If given a WEP key we may need it for shared key auth */
1487 if (cipher == WLAN_CIPHER_SUITE_WEP40 ||
1488 cipher == WLAN_CIPHER_SUITE_WEP104) {
1489 connect->key_idx = idx;
1490 connect->key = connkeys->params[idx].key;
1491 connect->key_len = connkeys->params[idx].key_len;
1492
1493 /*
1494 * If ciphers are not set (e.g. when going through
1495 * iwconfig), we have to set them appropriately here.
1496 */
1497 if (connect->crypto.cipher_group == 0)
1498 connect->crypto.cipher_group = cipher;
1499
1500 if (connect->crypto.n_ciphers_pairwise == 0) {
1501 connect->crypto.n_ciphers_pairwise = 1;
1502 connect->crypto.ciphers_pairwise[0] = cipher;
1503 }
1504 }
1505 } else {
1506 if (WARN_ON(connkeys))
1507 return -EINVAL;
1508
1509 /* connect can point to wdev->wext.connect which
1510 * can hold key data from a previous connection
1511 */
1512 connect->key = NULL;
1513 connect->key_len = 0;
1514 connect->key_idx = 0;
1515 }
1516
1517 wdev->connect_keys = connkeys;
1518 memcpy(wdev->u.client.ssid, connect->ssid, connect->ssid_len);
1519 wdev->u.client.ssid_len = connect->ssid_len;
1520
1521 wdev->conn_bss_type = connect->pbss ? IEEE80211_BSS_TYPE_PBSS :
1522 IEEE80211_BSS_TYPE_ESS;
1523
1524 if (!rdev->ops->connect)
1525 err = cfg80211_sme_connect(wdev, connect, prev_bssid);
1526 else
1527 err = rdev_connect(rdev, dev, connect);
1528
1529 if (err) {
1530 wdev->connect_keys = NULL;
1531 /*
1532 * This could be reassoc getting refused, don't clear
1533 * ssid_len in that case.
1534 */
1535 if (!wdev->connected)
1536 wdev->u.client.ssid_len = 0;
1537 return err;
1538 }
1539
1540 return 0;
1541}
1542
1543int cfg80211_disconnect(struct cfg80211_registered_device *rdev,
1544 struct net_device *dev, u16 reason, bool wextev)
1545{
1546 struct wireless_dev *wdev = dev->ieee80211_ptr;
1547 int err = 0;
1548
1549 lockdep_assert_wiphy(wdev->wiphy);
1550
1551 kfree_sensitive(wdev->connect_keys);
1552 wdev->connect_keys = NULL;
1553
1554 wdev->conn_owner_nlportid = 0;
1555
1556 if (wdev->conn)
1557 err = cfg80211_sme_disconnect(wdev, reason);
1558 else if (!rdev->ops->disconnect)
1559 cfg80211_mlme_down(rdev, dev);
1560 else if (wdev->u.client.ssid_len)
1561 err = rdev_disconnect(rdev, dev, reason);
1562
1563 /*
1564 * Clear ssid_len unless we actually were fully connected,
1565 * in which case cfg80211_disconnected() will take care of
1566 * this later.
1567 */
1568 if (!wdev->connected)
1569 wdev->u.client.ssid_len = 0;
1570
1571 return err;
1572}
1573
1574/*
1575 * Used to clean up after the connection / connection attempt owner socket
1576 * disconnects
1577 */
1578void cfg80211_autodisconnect_wk(struct work_struct *work)
1579{
1580 struct wireless_dev *wdev =
1581 container_of(work, struct wireless_dev, disconnect_wk);
1582 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
1583
1584 guard(wiphy)(wdev->wiphy);
1585
1586 if (wdev->conn_owner_nlportid) {
1587 switch (wdev->iftype) {
1588 case NL80211_IFTYPE_ADHOC:
1589 cfg80211_leave_ibss(rdev, wdev->netdev, false);
1590 break;
1591 case NL80211_IFTYPE_AP:
1592 case NL80211_IFTYPE_P2P_GO:
1593 cfg80211_stop_ap(rdev, wdev->netdev, -1, false);
1594 break;
1595 case NL80211_IFTYPE_MESH_POINT:
1596 cfg80211_leave_mesh(rdev, wdev->netdev);
1597 break;
1598 case NL80211_IFTYPE_STATION:
1599 case NL80211_IFTYPE_P2P_CLIENT:
1600 /*
1601 * Use disconnect_bssid if still connecting and
1602 * ops->disconnect not implemented. Otherwise we can
1603 * use cfg80211_disconnect.
1604 */
1605 if (rdev->ops->disconnect || wdev->connected)
1606 cfg80211_disconnect(rdev, wdev->netdev,
1607 WLAN_REASON_DEAUTH_LEAVING,
1608 true);
1609 else
1610 cfg80211_mlme_deauth(rdev, wdev->netdev,
1611 wdev->disconnect_bssid,
1612 NULL, 0,
1613 WLAN_REASON_DEAUTH_LEAVING,
1614 false);
1615 break;
1616 default:
1617 break;
1618 }
1619 }
1620}
Linux 6.x block layer and io_uring tree(s)