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, 2022-2025 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(objp: wdev->conn->ie);
60 kfree(objp: 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(wiphy: wdev->wiphy);
67 struct cfg80211_scan_request_int *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(wiphy: wdev->wiphy);
79
80 request = kzalloc(sizeof(*request) + sizeof(request->req.ssids[0]) +
81 sizeof(request->req.channels[0]) * n_channels,
82 GFP_KERNEL);
83 if (!request)
84 return -ENOMEM;
85
86 if (wdev->conn->params.channel) {
87 enum nl80211_band band = wdev->conn->params.channel->band;
88 struct ieee80211_supported_band *sband =
89 wdev->wiphy->bands[band];
90
91 if (!sband) {
92 kfree(objp: request);
93 return -EINVAL;
94 }
95 request->req.channels[0] = wdev->conn->params.channel;
96 request->req.rates[band] = (1 << sband->n_bitrates) - 1;
97 } else {
98 int i = 0, j;
99 enum nl80211_band band;
100 struct ieee80211_supported_band *bands;
101 struct ieee80211_channel *channel;
102
103 for (band = 0; band < NUM_NL80211_BANDS; band++) {
104 bands = wdev->wiphy->bands[band];
105 if (!bands)
106 continue;
107 for (j = 0; j < bands->n_channels; j++) {
108 channel = &bands->channels[j];
109 if (channel->flags & IEEE80211_CHAN_DISABLED)
110 continue;
111 request->req.channels[i++] = channel;
112 }
113 request->req.rates[band] = (1 << bands->n_bitrates) - 1;
114 }
115 n_channels = i;
116 }
117 request->req.n_channels = n_channels;
118 request->req.ssids = (void *)request +
119 struct_size(request, req.channels, n_channels);
120 request->req.n_ssids = 1;
121
122 memcpy(to: request->req.ssids[0].ssid, from: wdev->conn->params.ssid,
123 len: wdev->conn->params.ssid_len);
124 request->req.ssids[0].ssid_len = wdev->conn->params.ssid_len;
125
126 eth_broadcast_addr(addr: request->req.bssid);
127
128 request->req.wdev = wdev;
129 request->req.wiphy = &rdev->wiphy;
130 request->req.scan_start = jiffies;
131
132 rdev->scan_req = request;
133
134 err = cfg80211_scan(rdev);
135 if (!err) {
136 wdev->conn->state = CFG80211_CONN_SCANNING;
137 nl80211_send_scan_start(rdev, wdev);
138 dev_hold(dev: wdev->netdev);
139 } else {
140 rdev->scan_req = NULL;
141 kfree(objp: request);
142 }
143 return err;
144}
145
146static int cfg80211_conn_do_work(struct wireless_dev *wdev,
147 enum nl80211_timeout_reason *treason)
148{
149 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy: wdev->wiphy);
150 struct cfg80211_connect_params *params;
151 struct cfg80211_auth_request auth_req = {};
152 struct cfg80211_assoc_request req = {};
153 int err;
154
155 lockdep_assert_wiphy(wdev->wiphy);
156
157 if (!wdev->conn)
158 return 0;
159
160 params = &wdev->conn->params;
161
162 switch (wdev->conn->state) {
163 case CFG80211_CONN_SCANNING:
164 /* didn't find it during scan ... */
165 return -ENOENT;
166 case CFG80211_CONN_SCAN_AGAIN:
167 return cfg80211_conn_scan(wdev);
168 case CFG80211_CONN_AUTHENTICATE_NEXT:
169 if (WARN_ON(!rdev->ops->auth))
170 return -EOPNOTSUPP;
171 wdev->conn->state = CFG80211_CONN_AUTHENTICATING;
172 auth_req.key = params->key;
173 auth_req.key_len = params->key_len;
174 auth_req.key_idx = params->key_idx;
175 auth_req.auth_type = params->auth_type;
176 auth_req.bss = cfg80211_get_bss(wiphy: &rdev->wiphy, channel: params->channel,
177 bssid: params->bssid,
178 ssid: params->ssid, ssid_len: params->ssid_len,
179 bss_type: IEEE80211_BSS_TYPE_ESS,
180 privacy: IEEE80211_PRIVACY_ANY);
181 auth_req.link_id = -1;
182 err = cfg80211_mlme_auth(rdev, dev: wdev->netdev, req: &auth_req);
183 cfg80211_put_bss(wiphy: &rdev->wiphy, bss: auth_req.bss);
184 return err;
185 case CFG80211_CONN_AUTH_FAILED_TIMEOUT:
186 *treason = NL80211_TIMEOUT_AUTH;
187 return -ENOTCONN;
188 case CFG80211_CONN_ASSOCIATE_NEXT:
189 if (WARN_ON(!rdev->ops->assoc))
190 return -EOPNOTSUPP;
191 wdev->conn->state = CFG80211_CONN_ASSOCIATING;
192 if (wdev->conn->prev_bssid_valid)
193 req.prev_bssid = wdev->conn->prev_bssid;
194 req.ie = params->ie;
195 req.ie_len = params->ie_len;
196 req.use_mfp = params->mfp != NL80211_MFP_NO;
197 req.crypto = params->crypto;
198 req.flags = params->flags;
199 req.ht_capa = params->ht_capa;
200 req.ht_capa_mask = params->ht_capa_mask;
201 req.vht_capa = params->vht_capa;
202 req.vht_capa_mask = params->vht_capa_mask;
203 req.link_id = -1;
204
205 req.bss = cfg80211_get_bss(wiphy: &rdev->wiphy, channel: params->channel,
206 bssid: params->bssid,
207 ssid: params->ssid, ssid_len: params->ssid_len,
208 bss_type: IEEE80211_BSS_TYPE_ESS,
209 privacy: IEEE80211_PRIVACY_ANY);
210 if (!req.bss) {
211 err = -ENOENT;
212 } else {
213 err = cfg80211_mlme_assoc(rdev, dev: wdev->netdev,
214 req: &req, NULL);
215 cfg80211_put_bss(wiphy: &rdev->wiphy, bss: req.bss);
216 }
217
218 if (err)
219 cfg80211_mlme_deauth(rdev, dev: wdev->netdev, bssid: params->bssid,
220 NULL, ie_len: 0,
221 reason: WLAN_REASON_DEAUTH_LEAVING,
222 local_state_change: false);
223 return err;
224 case CFG80211_CONN_ASSOC_FAILED_TIMEOUT:
225 *treason = NL80211_TIMEOUT_ASSOC;
226 fallthrough;
227 case CFG80211_CONN_ASSOC_FAILED:
228 cfg80211_mlme_deauth(rdev, dev: wdev->netdev, bssid: params->bssid,
229 NULL, ie_len: 0,
230 reason: WLAN_REASON_DEAUTH_LEAVING, local_state_change: false);
231 return -ENOTCONN;
232 case CFG80211_CONN_DEAUTH:
233 cfg80211_mlme_deauth(rdev, dev: wdev->netdev, bssid: params->bssid,
234 NULL, ie_len: 0,
235 reason: WLAN_REASON_DEAUTH_LEAVING, local_state_change: false);
236 fallthrough;
237 case CFG80211_CONN_ABANDON:
238 /* free directly, disconnected event already sent */
239 cfg80211_sme_free(wdev);
240 return 0;
241 default:
242 return 0;
243 }
244}
245
246void cfg80211_conn_work(struct work_struct *work)
247{
248 struct cfg80211_registered_device *rdev =
249 container_of(work, struct cfg80211_registered_device, conn_work);
250 struct wireless_dev *wdev;
251 u8 bssid_buf[ETH_ALEN], *bssid = NULL;
252 enum nl80211_timeout_reason treason;
253
254 guard(wiphy)(T: &rdev->wiphy);
255
256 list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) {
257 if (!wdev->netdev)
258 continue;
259
260 if (!netif_running(dev: wdev->netdev))
261 continue;
262
263 if (!wdev->conn ||
264 wdev->conn->state == CFG80211_CONN_CONNECTED)
265 continue;
266
267 if (wdev->conn->params.bssid) {
268 memcpy(to: bssid_buf, from: wdev->conn->params.bssid, ETH_ALEN);
269 bssid = bssid_buf;
270 }
271 treason = NL80211_TIMEOUT_UNSPECIFIED;
272 if (cfg80211_conn_do_work(wdev, treason: &treason)) {
273 struct cfg80211_connect_resp_params cr;
274
275 memset(s: &cr, c: 0, n: sizeof(cr));
276 cr.status = -1;
277 cr.links[0].bssid = bssid;
278 cr.timeout_reason = treason;
279 __cfg80211_connect_result(dev: wdev->netdev, params: &cr, wextev: false);
280 }
281 }
282}
283
284static void cfg80211_step_auth_next(struct cfg80211_conn *conn,
285 struct cfg80211_bss *bss)
286{
287 memcpy(to: conn->bssid, from: bss->bssid, ETH_ALEN);
288 conn->params.bssid = conn->bssid;
289 conn->params.channel = bss->channel;
290 conn->state = CFG80211_CONN_AUTHENTICATE_NEXT;
291}
292
293/* Returned bss is reference counted and must be cleaned up appropriately. */
294static struct cfg80211_bss *cfg80211_get_conn_bss(struct wireless_dev *wdev)
295{
296 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy: wdev->wiphy);
297 struct cfg80211_bss *bss;
298
299 lockdep_assert_wiphy(wdev->wiphy);
300
301 bss = cfg80211_get_bss(wiphy: wdev->wiphy, channel: wdev->conn->params.channel,
302 bssid: wdev->conn->params.bssid,
303 ssid: wdev->conn->params.ssid,
304 ssid_len: wdev->conn->params.ssid_len,
305 bss_type: wdev->conn_bss_type,
306 IEEE80211_PRIVACY(wdev->conn->params.privacy));
307 if (!bss)
308 return NULL;
309
310 cfg80211_step_auth_next(conn: wdev->conn, bss);
311 schedule_work(work: &rdev->conn_work);
312
313 return bss;
314}
315
316void cfg80211_sme_scan_done(struct net_device *dev)
317{
318 struct wireless_dev *wdev = dev->ieee80211_ptr;
319 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy: wdev->wiphy);
320 struct cfg80211_bss *bss;
321
322 lockdep_assert_wiphy(wdev->wiphy);
323
324 if (!wdev->conn)
325 return;
326
327 if (wdev->conn->state != CFG80211_CONN_SCANNING &&
328 wdev->conn->state != CFG80211_CONN_SCAN_AGAIN)
329 return;
330
331 bss = cfg80211_get_conn_bss(wdev);
332 if (bss)
333 cfg80211_put_bss(wiphy: &rdev->wiphy, bss);
334 else
335 schedule_work(work: &rdev->conn_work);
336}
337
338void cfg80211_sme_rx_auth(struct wireless_dev *wdev, const u8 *buf, size_t len)
339{
340 struct wiphy *wiphy = wdev->wiphy;
341 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
342 struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)buf;
343 u16 status_code = le16_to_cpu(mgmt->u.auth.status_code);
344
345 lockdep_assert_wiphy(wdev->wiphy);
346
347 if (!wdev->conn || wdev->conn->state == CFG80211_CONN_CONNECTED)
348 return;
349
350 if (status_code == WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG &&
351 wdev->conn->auto_auth &&
352 wdev->conn->params.auth_type != NL80211_AUTHTYPE_NETWORK_EAP) {
353 /* select automatically between only open, shared, leap */
354 switch (wdev->conn->params.auth_type) {
355 case NL80211_AUTHTYPE_OPEN_SYSTEM:
356 if (wdev->connect_keys)
357 wdev->conn->params.auth_type =
358 NL80211_AUTHTYPE_SHARED_KEY;
359 else
360 wdev->conn->params.auth_type =
361 NL80211_AUTHTYPE_NETWORK_EAP;
362 break;
363 case NL80211_AUTHTYPE_SHARED_KEY:
364 wdev->conn->params.auth_type =
365 NL80211_AUTHTYPE_NETWORK_EAP;
366 break;
367 default:
368 /* huh? */
369 wdev->conn->params.auth_type =
370 NL80211_AUTHTYPE_OPEN_SYSTEM;
371 break;
372 }
373 wdev->conn->state = CFG80211_CONN_AUTHENTICATE_NEXT;
374 schedule_work(work: &rdev->conn_work);
375 } else if (status_code != WLAN_STATUS_SUCCESS) {
376 struct cfg80211_connect_resp_params cr;
377
378 memset(s: &cr, c: 0, n: sizeof(cr));
379 cr.status = status_code;
380 cr.links[0].bssid = mgmt->bssid;
381 cr.timeout_reason = NL80211_TIMEOUT_UNSPECIFIED;
382 __cfg80211_connect_result(dev: wdev->netdev, params: &cr, wextev: false);
383 } else if (wdev->conn->state == CFG80211_CONN_AUTHENTICATING) {
384 wdev->conn->state = CFG80211_CONN_ASSOCIATE_NEXT;
385 schedule_work(work: &rdev->conn_work);
386 }
387}
388
389bool cfg80211_sme_rx_assoc_resp(struct wireless_dev *wdev, u16 status)
390{
391 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy: wdev->wiphy);
392
393 if (!wdev->conn)
394 return false;
395
396 if (status == WLAN_STATUS_SUCCESS) {
397 wdev->conn->state = CFG80211_CONN_CONNECTED;
398 return false;
399 }
400
401 if (wdev->conn->prev_bssid_valid) {
402 /*
403 * Some stupid APs don't accept reassoc, so we
404 * need to fall back to trying regular assoc;
405 * return true so no event is sent to userspace.
406 */
407 wdev->conn->prev_bssid_valid = false;
408 wdev->conn->state = CFG80211_CONN_ASSOCIATE_NEXT;
409 schedule_work(work: &rdev->conn_work);
410 return true;
411 }
412
413 wdev->conn->state = CFG80211_CONN_ASSOC_FAILED;
414 schedule_work(work: &rdev->conn_work);
415 return false;
416}
417
418void cfg80211_sme_deauth(struct wireless_dev *wdev)
419{
420 cfg80211_sme_free(wdev);
421}
422
423void cfg80211_sme_auth_timeout(struct wireless_dev *wdev)
424{
425 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy: wdev->wiphy);
426
427 if (!wdev->conn)
428 return;
429
430 wdev->conn->state = CFG80211_CONN_AUTH_FAILED_TIMEOUT;
431 schedule_work(work: &rdev->conn_work);
432}
433
434void cfg80211_sme_disassoc(struct wireless_dev *wdev)
435{
436 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy: wdev->wiphy);
437
438 if (!wdev->conn)
439 return;
440
441 wdev->conn->state = CFG80211_CONN_DEAUTH;
442 schedule_work(work: &rdev->conn_work);
443}
444
445void cfg80211_sme_assoc_timeout(struct wireless_dev *wdev)
446{
447 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy: wdev->wiphy);
448
449 if (!wdev->conn)
450 return;
451
452 wdev->conn->state = CFG80211_CONN_ASSOC_FAILED_TIMEOUT;
453 schedule_work(work: &rdev->conn_work);
454}
455
456void cfg80211_sme_abandon_assoc(struct wireless_dev *wdev)
457{
458 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy: wdev->wiphy);
459
460 if (!wdev->conn)
461 return;
462
463 wdev->conn->state = CFG80211_CONN_ABANDON;
464 schedule_work(work: &rdev->conn_work);
465}
466
467static void cfg80211_wdev_release_bsses(struct wireless_dev *wdev)
468{
469 unsigned int link;
470
471 for_each_valid_link(wdev, link) {
472 if (!wdev->links[link].client.current_bss)
473 continue;
474 cfg80211_unhold_bss(bss: wdev->links[link].client.current_bss);
475 cfg80211_put_bss(wiphy: wdev->wiphy,
476 bss: &wdev->links[link].client.current_bss->pub);
477 wdev->links[link].client.current_bss = NULL;
478 }
479}
480
481void cfg80211_wdev_release_link_bsses(struct wireless_dev *wdev, u16 link_mask)
482{
483 unsigned int link;
484
485 for_each_valid_link(wdev, link) {
486 if (!wdev->links[link].client.current_bss ||
487 !(link_mask & BIT(link)))
488 continue;
489 cfg80211_unhold_bss(bss: wdev->links[link].client.current_bss);
490 cfg80211_put_bss(wiphy: wdev->wiphy,
491 bss: &wdev->links[link].client.current_bss->pub);
492 wdev->links[link].client.current_bss = NULL;
493 }
494}
495
496static int cfg80211_sme_get_conn_ies(struct wireless_dev *wdev,
497 const u8 *ies, size_t ies_len,
498 const u8 **out_ies, size_t *out_ies_len)
499{
500 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy: wdev->wiphy);
501 u8 *buf;
502 size_t offs;
503
504 if (!rdev->wiphy.extended_capabilities_len ||
505 (ies && cfg80211_find_ie(eid: WLAN_EID_EXT_CAPABILITY, ies, len: ies_len))) {
506 *out_ies = kmemdup(ies, ies_len, GFP_KERNEL);
507 if (!*out_ies)
508 return -ENOMEM;
509 *out_ies_len = ies_len;
510 return 0;
511 }
512
513 buf = kmalloc(ies_len + rdev->wiphy.extended_capabilities_len + 2,
514 GFP_KERNEL);
515 if (!buf)
516 return -ENOMEM;
517
518 if (ies_len) {
519 static const u8 before_extcapa[] = {
520 /* not listing IEs expected to be created by driver */
521 WLAN_EID_RSN,
522 WLAN_EID_QOS_CAPA,
523 WLAN_EID_RRM_ENABLED_CAPABILITIES,
524 WLAN_EID_MOBILITY_DOMAIN,
525 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
526 WLAN_EID_BSS_COEX_2040,
527 };
528
529 offs = ieee80211_ie_split(ies, ielen: ies_len, ids: before_extcapa,
530 ARRAY_SIZE(before_extcapa), offset: 0);
531 memcpy(to: buf, from: ies, len: offs);
532 /* leave a whole for extended capabilities IE */
533 memcpy(to: buf + offs + rdev->wiphy.extended_capabilities_len + 2,
534 from: ies + offs, len: ies_len - offs);
535 } else {
536 offs = 0;
537 }
538
539 /* place extended capabilities IE (with only driver capabilities) */
540 buf[offs] = WLAN_EID_EXT_CAPABILITY;
541 buf[offs + 1] = rdev->wiphy.extended_capabilities_len;
542 memcpy(to: buf + offs + 2,
543 from: rdev->wiphy.extended_capabilities,
544 len: rdev->wiphy.extended_capabilities_len);
545
546 *out_ies = buf;
547 *out_ies_len = ies_len + rdev->wiphy.extended_capabilities_len + 2;
548
549 return 0;
550}
551
552static int cfg80211_sme_connect(struct wireless_dev *wdev,
553 struct cfg80211_connect_params *connect,
554 const u8 *prev_bssid)
555{
556 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy: wdev->wiphy);
557 struct cfg80211_bss *bss;
558 int err;
559
560 if (!rdev->ops->auth || !rdev->ops->assoc)
561 return -EOPNOTSUPP;
562
563 cfg80211_wdev_release_bsses(wdev);
564
565 if (wdev->connected) {
566 cfg80211_sme_free(wdev);
567 wdev->connected = false;
568 }
569
570 if (wdev->conn)
571 return -EINPROGRESS;
572
573 wdev->conn = kzalloc(sizeof(*wdev->conn), GFP_KERNEL);
574 if (!wdev->conn)
575 return -ENOMEM;
576
577 /*
578 * Copy all parameters, and treat explicitly IEs, BSSID, SSID.
579 */
580 memcpy(to: &wdev->conn->params, from: connect, len: sizeof(*connect));
581 if (connect->bssid) {
582 wdev->conn->params.bssid = wdev->conn->bssid;
583 memcpy(to: wdev->conn->bssid, from: connect->bssid, ETH_ALEN);
584 }
585
586 if (cfg80211_sme_get_conn_ies(wdev, ies: connect->ie, ies_len: connect->ie_len,
587 out_ies: &wdev->conn->ie,
588 out_ies_len: &wdev->conn->params.ie_len)) {
589 kfree(objp: wdev->conn);
590 wdev->conn = NULL;
591 return -ENOMEM;
592 }
593 wdev->conn->params.ie = wdev->conn->ie;
594
595 if (connect->auth_type == NL80211_AUTHTYPE_AUTOMATIC) {
596 wdev->conn->auto_auth = true;
597 /* start with open system ... should mostly work */
598 wdev->conn->params.auth_type =
599 NL80211_AUTHTYPE_OPEN_SYSTEM;
600 } else {
601 wdev->conn->auto_auth = false;
602 }
603
604 wdev->conn->params.ssid = wdev->u.client.ssid;
605 wdev->conn->params.ssid_len = wdev->u.client.ssid_len;
606
607 /* see if we have the bss already */
608 bss = cfg80211_get_bss(wiphy: wdev->wiphy, channel: wdev->conn->params.channel,
609 bssid: wdev->conn->params.bssid,
610 ssid: wdev->conn->params.ssid,
611 ssid_len: wdev->conn->params.ssid_len,
612 bss_type: wdev->conn_bss_type,
613 IEEE80211_PRIVACY(wdev->conn->params.privacy));
614
615 if (prev_bssid) {
616 memcpy(to: wdev->conn->prev_bssid, from: prev_bssid, ETH_ALEN);
617 wdev->conn->prev_bssid_valid = true;
618 }
619
620 /* we're good if we have a matching bss struct */
621 if (bss) {
622 enum nl80211_timeout_reason treason;
623
624 cfg80211_step_auth_next(conn: wdev->conn, bss);
625 err = cfg80211_conn_do_work(wdev, treason: &treason);
626 cfg80211_put_bss(wiphy: wdev->wiphy, bss);
627 } else {
628 /* otherwise we'll need to scan for the AP first */
629 err = cfg80211_conn_scan(wdev);
630
631 /*
632 * If we can't scan right now, then we need to scan again
633 * after the current scan finished, since the parameters
634 * changed (unless we find a good AP anyway).
635 */
636 if (err == -EBUSY) {
637 err = 0;
638 wdev->conn->state = CFG80211_CONN_SCAN_AGAIN;
639 }
640 }
641
642 if (err)
643 cfg80211_sme_free(wdev);
644
645 return err;
646}
647
648static int cfg80211_sme_disconnect(struct wireless_dev *wdev, u16 reason)
649{
650 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy: wdev->wiphy);
651 int err;
652
653 if (!wdev->conn)
654 return 0;
655
656 if (!rdev->ops->deauth)
657 return -EOPNOTSUPP;
658
659 if (wdev->conn->state == CFG80211_CONN_SCANNING ||
660 wdev->conn->state == CFG80211_CONN_SCAN_AGAIN) {
661 err = 0;
662 goto out;
663 }
664
665 /* wdev->conn->params.bssid must be set if > SCANNING */
666 err = cfg80211_mlme_deauth(rdev, dev: wdev->netdev,
667 bssid: wdev->conn->params.bssid,
668 NULL, ie_len: 0, reason, local_state_change: false);
669 out:
670 cfg80211_sme_free(wdev);
671 return err;
672}
673
674/*
675 * code shared for in-device and software SME
676 */
677
678static bool cfg80211_is_all_idle(void)
679{
680 struct cfg80211_registered_device *rdev;
681 struct wireless_dev *wdev;
682 bool is_all_idle = true;
683
684 /*
685 * All devices must be idle as otherwise if you are actively
686 * scanning some new beacon hints could be learned and would
687 * count as new regulatory hints.
688 * Also if there is any other active beaconing interface we
689 * need not issue a disconnect hint and reset any info such
690 * as chan dfs state, etc.
691 */
692 for_each_rdev(rdev) {
693 guard(wiphy)(T: &rdev->wiphy);
694
695 list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) {
696 if (wdev->conn || wdev->connected ||
697 cfg80211_beaconing_iface_active(wdev))
698 is_all_idle = false;
699 }
700 }
701
702 return is_all_idle;
703}
704
705static void disconnect_work(struct work_struct *work)
706{
707 rtnl_lock();
708 if (cfg80211_is_all_idle())
709 regulatory_hint_disconnect();
710 rtnl_unlock();
711}
712
713DECLARE_WORK(cfg80211_disconnect_work, disconnect_work);
714
715static void
716cfg80211_connect_result_release_bsses(struct wireless_dev *wdev,
717 struct cfg80211_connect_resp_params *cr)
718{
719 unsigned int link;
720
721 for_each_valid_link(cr, link) {
722 if (!cr->links[link].bss)
723 continue;
724 cfg80211_unhold_bss(bss: bss_from_pub(pub: cr->links[link].bss));
725 cfg80211_put_bss(wiphy: wdev->wiphy, bss: cr->links[link].bss);
726 }
727}
728
729/*
730 * API calls for drivers implementing connect/disconnect and
731 * SME event handling
732 */
733
734/* This method must consume bss one way or another */
735void __cfg80211_connect_result(struct net_device *dev,
736 struct cfg80211_connect_resp_params *cr,
737 bool wextev)
738{
739 struct wireless_dev *wdev = dev->ieee80211_ptr;
740 const struct element *country_elem = NULL;
741 const struct element *ssid;
742 const u8 *country_data;
743 u8 country_datalen;
744#ifdef CONFIG_CFG80211_WEXT
745 union iwreq_data wrqu;
746#endif
747 unsigned int link;
748 const u8 *connected_addr;
749 bool bss_not_found = false;
750
751 lockdep_assert_wiphy(wdev->wiphy);
752
753 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION &&
754 wdev->iftype != NL80211_IFTYPE_P2P_CLIENT))
755 goto out;
756
757 if (cr->valid_links) {
758 if (WARN_ON(!cr->ap_mld_addr))
759 goto out;
760
761 for_each_valid_link(cr, link) {
762 if (WARN_ON(!cr->links[link].addr))
763 goto out;
764 }
765
766 if (WARN_ON(wdev->connect_keys))
767 goto out;
768 }
769
770 wdev->unprot_beacon_reported = 0;
771 nl80211_send_connect_result(rdev: wiphy_to_rdev(wiphy: wdev->wiphy), netdev: dev, params: cr,
772 GFP_KERNEL);
773 connected_addr = cr->valid_links ? cr->ap_mld_addr : cr->links[0].bssid;
774
775#ifdef CONFIG_CFG80211_WEXT
776 if (wextev && !cr->valid_links) {
777 if (cr->req_ie && cr->status == WLAN_STATUS_SUCCESS) {
778 memset(&wrqu, 0, sizeof(wrqu));
779 wrqu.data.length = cr->req_ie_len;
780 wireless_send_event(dev, IWEVASSOCREQIE, &wrqu,
781 cr->req_ie);
782 }
783
784 if (cr->resp_ie && cr->status == WLAN_STATUS_SUCCESS) {
785 memset(&wrqu, 0, sizeof(wrqu));
786 wrqu.data.length = cr->resp_ie_len;
787 wireless_send_event(dev, IWEVASSOCRESPIE, &wrqu,
788 cr->resp_ie);
789 }
790
791 memset(&wrqu, 0, sizeof(wrqu));
792 wrqu.ap_addr.sa_family = ARPHRD_ETHER;
793 if (connected_addr && cr->status == WLAN_STATUS_SUCCESS) {
794 memcpy(wrqu.ap_addr.sa_data, connected_addr, ETH_ALEN);
795 memcpy(wdev->wext.prev_bssid, connected_addr, ETH_ALEN);
796 wdev->wext.prev_bssid_valid = true;
797 }
798 wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL);
799 }
800#endif
801
802 if (cr->status == WLAN_STATUS_SUCCESS) {
803 if (!wiphy_to_rdev(wiphy: wdev->wiphy)->ops->connect) {
804 for_each_valid_link(cr, link) {
805 if (WARN_ON_ONCE(!cr->links[link].bss))
806 break;
807 }
808 }
809
810 for_each_valid_link(cr, link) {
811 /* don't do extra lookups for failures */
812 if (cr->links[link].status != WLAN_STATUS_SUCCESS)
813 continue;
814
815 if (cr->links[link].bss)
816 continue;
817
818 cr->links[link].bss =
819 cfg80211_get_bss(wiphy: wdev->wiphy, NULL,
820 bssid: cr->links[link].bssid,
821 ssid: wdev->u.client.ssid,
822 ssid_len: wdev->u.client.ssid_len,
823 bss_type: wdev->conn_bss_type,
824 privacy: IEEE80211_PRIVACY_ANY);
825 if (!cr->links[link].bss) {
826 bss_not_found = true;
827 break;
828 }
829 cfg80211_hold_bss(bss: bss_from_pub(pub: cr->links[link].bss));
830 }
831 }
832
833 cfg80211_wdev_release_bsses(wdev);
834
835 if (cr->status != WLAN_STATUS_SUCCESS) {
836 kfree_sensitive(objp: wdev->connect_keys);
837 wdev->connect_keys = NULL;
838 wdev->u.client.ssid_len = 0;
839 wdev->conn_owner_nlportid = 0;
840 cfg80211_connect_result_release_bsses(wdev, cr);
841 cfg80211_sme_free(wdev);
842 return;
843 }
844
845 if (WARN_ON(bss_not_found)) {
846 cfg80211_connect_result_release_bsses(wdev, cr);
847 return;
848 }
849
850 memset(s: wdev->links, c: 0, n: sizeof(wdev->links));
851 for_each_valid_link(cr, link) {
852 if (cr->links[link].status == WLAN_STATUS_SUCCESS)
853 continue;
854 cr->valid_links &= ~BIT(link);
855 /* don't require bss pointer for failed links */
856 if (!cr->links[link].bss)
857 continue;
858 cfg80211_unhold_bss(bss: bss_from_pub(pub: cr->links[link].bss));
859 cfg80211_put_bss(wiphy: wdev->wiphy, bss: cr->links[link].bss);
860 }
861 wdev->valid_links = cr->valid_links;
862 for_each_valid_link(cr, link)
863 wdev->links[link].client.current_bss =
864 bss_from_pub(pub: cr->links[link].bss);
865 wdev->connected = true;
866 ether_addr_copy(dst: wdev->u.client.connected_addr, src: connected_addr);
867 if (cr->valid_links) {
868 for_each_valid_link(cr, link)
869 memcpy(to: wdev->links[link].addr, from: cr->links[link].addr,
870 ETH_ALEN);
871 }
872
873 cfg80211_upload_connect_keys(wdev);
874
875 rcu_read_lock();
876 for_each_valid_link(cr, link) {
877 country_elem =
878 ieee80211_bss_get_elem(bss: cr->links[link].bss,
879 id: WLAN_EID_COUNTRY);
880 if (country_elem)
881 break;
882 }
883 if (!country_elem) {
884 rcu_read_unlock();
885 return;
886 }
887
888 country_datalen = country_elem->datalen;
889 country_data = kmemdup(country_elem->data, country_datalen, GFP_ATOMIC);
890 rcu_read_unlock();
891
892 if (!country_data)
893 return;
894
895 regulatory_hint_country_ie(wiphy: wdev->wiphy,
896 band: cr->links[link].bss->channel->band,
897 country_ie: country_data, country_ie_len: country_datalen);
898 kfree(objp: country_data);
899
900 if (!wdev->u.client.ssid_len) {
901 rcu_read_lock();
902 for_each_valid_link(cr, link) {
903 u32 ssid_len;
904
905 ssid = ieee80211_bss_get_elem(bss: cr->links[link].bss,
906 id: WLAN_EID_SSID);
907
908 if (!ssid || !ssid->datalen)
909 continue;
910
911 ssid_len = min(ssid->datalen, IEEE80211_MAX_SSID_LEN);
912 memcpy(to: wdev->u.client.ssid, from: ssid->data, len: ssid_len);
913 wdev->u.client.ssid_len = ssid->datalen;
914 break;
915 }
916 rcu_read_unlock();
917 }
918
919 return;
920out:
921 for_each_valid_link(cr, link)
922 cfg80211_put_bss(wiphy: wdev->wiphy, bss: cr->links[link].bss);
923}
924
925static void cfg80211_update_link_bss(struct wireless_dev *wdev,
926 struct cfg80211_bss **bss)
927{
928 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy: wdev->wiphy);
929 struct cfg80211_internal_bss *ibss;
930
931 if (!*bss)
932 return;
933
934 ibss = bss_from_pub(pub: *bss);
935 if (list_empty(head: &ibss->list)) {
936 struct cfg80211_bss *found = NULL, *tmp = *bss;
937
938 found = cfg80211_get_bss(wiphy: wdev->wiphy, NULL,
939 bssid: (*bss)->bssid,
940 ssid: wdev->u.client.ssid,
941 ssid_len: wdev->u.client.ssid_len,
942 bss_type: wdev->conn_bss_type,
943 privacy: IEEE80211_PRIVACY_ANY);
944 if (found) {
945 /* The same BSS is already updated so use it
946 * instead, as it has latest info.
947 */
948 *bss = found;
949 } else {
950 /* Update with BSS provided by driver, it will
951 * be freshly added and ref cnted, we can free
952 * the old one.
953 *
954 * signal_valid can be false, as we are not
955 * expecting the BSS to be found.
956 *
957 * keep the old timestamp to avoid confusion
958 */
959 cfg80211_bss_update(rdev, tmp: ibss, signal_valid: false,
960 ts: ibss->ts);
961 }
962
963 cfg80211_put_bss(wiphy: wdev->wiphy, bss: tmp);
964 }
965}
966
967/* Consumes bss object(s) one way or another */
968void cfg80211_connect_done(struct net_device *dev,
969 struct cfg80211_connect_resp_params *params,
970 gfp_t gfp)
971{
972 struct wireless_dev *wdev = dev->ieee80211_ptr;
973 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy: wdev->wiphy);
974 struct cfg80211_event *ev;
975 unsigned long flags;
976 u8 *next;
977 size_t link_info_size = 0;
978 unsigned int link;
979
980 for_each_valid_link(params, link) {
981 cfg80211_update_link_bss(wdev, bss: &params->links[link].bss);
982 link_info_size += params->links[link].bssid ? ETH_ALEN : 0;
983 link_info_size += params->links[link].addr ? ETH_ALEN : 0;
984 }
985
986 ev = kzalloc(sizeof(*ev) + (params->ap_mld_addr ? ETH_ALEN : 0) +
987 params->req_ie_len + params->resp_ie_len +
988 params->fils.kek_len + params->fils.pmk_len +
989 (params->fils.pmkid ? WLAN_PMKID_LEN : 0) + link_info_size,
990 gfp);
991
992 if (!ev) {
993 for_each_valid_link(params, link)
994 cfg80211_put_bss(wiphy: wdev->wiphy,
995 bss: params->links[link].bss);
996 return;
997 }
998
999 ev->type = EVENT_CONNECT_RESULT;
1000 next = ((u8 *)ev) + sizeof(*ev);
1001 if (params->ap_mld_addr) {
1002 ev->cr.ap_mld_addr = next;
1003 memcpy(to: (void *)ev->cr.ap_mld_addr, from: params->ap_mld_addr,
1004 ETH_ALEN);
1005 next += ETH_ALEN;
1006 }
1007 if (params->req_ie_len) {
1008 ev->cr.req_ie = next;
1009 ev->cr.req_ie_len = params->req_ie_len;
1010 memcpy(to: (void *)ev->cr.req_ie, from: params->req_ie,
1011 len: params->req_ie_len);
1012 next += params->req_ie_len;
1013 }
1014 if (params->resp_ie_len) {
1015 ev->cr.resp_ie = next;
1016 ev->cr.resp_ie_len = params->resp_ie_len;
1017 memcpy(to: (void *)ev->cr.resp_ie, from: params->resp_ie,
1018 len: params->resp_ie_len);
1019 next += params->resp_ie_len;
1020 }
1021 if (params->fils.kek_len) {
1022 ev->cr.fils.kek = next;
1023 ev->cr.fils.kek_len = params->fils.kek_len;
1024 memcpy(to: (void *)ev->cr.fils.kek, from: params->fils.kek,
1025 len: params->fils.kek_len);
1026 next += params->fils.kek_len;
1027 }
1028 if (params->fils.pmk_len) {
1029 ev->cr.fils.pmk = next;
1030 ev->cr.fils.pmk_len = params->fils.pmk_len;
1031 memcpy(to: (void *)ev->cr.fils.pmk, from: params->fils.pmk,
1032 len: params->fils.pmk_len);
1033 next += params->fils.pmk_len;
1034 }
1035 if (params->fils.pmkid) {
1036 ev->cr.fils.pmkid = next;
1037 memcpy(to: (void *)ev->cr.fils.pmkid, from: params->fils.pmkid,
1038 WLAN_PMKID_LEN);
1039 next += WLAN_PMKID_LEN;
1040 }
1041 ev->cr.fils.update_erp_next_seq_num = params->fils.update_erp_next_seq_num;
1042 if (params->fils.update_erp_next_seq_num)
1043 ev->cr.fils.erp_next_seq_num = params->fils.erp_next_seq_num;
1044 ev->cr.valid_links = params->valid_links;
1045 for_each_valid_link(params, link) {
1046 if (params->links[link].bss)
1047 cfg80211_hold_bss(
1048 bss: bss_from_pub(pub: params->links[link].bss));
1049 ev->cr.links[link].bss = params->links[link].bss;
1050 ev->cr.links[link].status = params->links[link].status;
1051
1052 if (params->links[link].addr) {
1053 ev->cr.links[link].addr = next;
1054 memcpy(to: (void *)ev->cr.links[link].addr,
1055 from: params->links[link].addr,
1056 ETH_ALEN);
1057 next += ETH_ALEN;
1058 }
1059 if (params->links[link].bssid) {
1060 ev->cr.links[link].bssid = next;
1061 memcpy(to: (void *)ev->cr.links[link].bssid,
1062 from: params->links[link].bssid,
1063 ETH_ALEN);
1064 next += ETH_ALEN;
1065 }
1066 }
1067 ev->cr.status = params->status;
1068 ev->cr.timeout_reason = params->timeout_reason;
1069
1070 spin_lock_irqsave(&wdev->event_lock, flags);
1071 list_add_tail(new: &ev->list, head: &wdev->event_list);
1072 spin_unlock_irqrestore(lock: &wdev->event_lock, flags);
1073 queue_work(wq: cfg80211_wq, work: &rdev->event_work);
1074}
1075EXPORT_SYMBOL(cfg80211_connect_done);
1076
1077/* Consumes bss object one way or another */
1078void __cfg80211_roamed(struct wireless_dev *wdev,
1079 struct cfg80211_roam_info *info)
1080{
1081#ifdef CONFIG_CFG80211_WEXT
1082 union iwreq_data wrqu;
1083#endif
1084 unsigned int link;
1085 const u8 *connected_addr;
1086
1087 lockdep_assert_wiphy(wdev->wiphy);
1088
1089 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION &&
1090 wdev->iftype != NL80211_IFTYPE_P2P_CLIENT))
1091 goto out;
1092
1093 if (WARN_ON(!wdev->connected))
1094 goto out;
1095
1096 if (info->valid_links) {
1097 if (WARN_ON(!info->ap_mld_addr))
1098 goto out;
1099
1100 for_each_valid_link(info, link) {
1101 if (WARN_ON(!info->links[link].addr))
1102 goto out;
1103 }
1104 }
1105
1106 cfg80211_wdev_release_bsses(wdev);
1107
1108 for_each_valid_link(info, link) {
1109 if (WARN_ON(!info->links[link].bss))
1110 goto out;
1111 }
1112
1113 memset(s: wdev->links, c: 0, n: sizeof(wdev->links));
1114 wdev->valid_links = info->valid_links;
1115 for_each_valid_link(info, link) {
1116 cfg80211_hold_bss(bss: bss_from_pub(pub: info->links[link].bss));
1117 wdev->links[link].client.current_bss =
1118 bss_from_pub(pub: info->links[link].bss);
1119 }
1120
1121 connected_addr = info->valid_links ?
1122 info->ap_mld_addr :
1123 info->links[0].bss->bssid;
1124 ether_addr_copy(dst: wdev->u.client.connected_addr, src: connected_addr);
1125 if (info->valid_links) {
1126 for_each_valid_link(info, link)
1127 memcpy(to: wdev->links[link].addr, from: info->links[link].addr,
1128 ETH_ALEN);
1129 }
1130 wdev->unprot_beacon_reported = 0;
1131 nl80211_send_roamed(rdev: wiphy_to_rdev(wiphy: wdev->wiphy),
1132 netdev: wdev->netdev, info, GFP_KERNEL);
1133
1134#ifdef CONFIG_CFG80211_WEXT
1135 if (!info->valid_links) {
1136 if (info->req_ie) {
1137 memset(&wrqu, 0, sizeof(wrqu));
1138 wrqu.data.length = info->req_ie_len;
1139 wireless_send_event(wdev->netdev, IWEVASSOCREQIE,
1140 &wrqu, info->req_ie);
1141 }
1142
1143 if (info->resp_ie) {
1144 memset(&wrqu, 0, sizeof(wrqu));
1145 wrqu.data.length = info->resp_ie_len;
1146 wireless_send_event(wdev->netdev, IWEVASSOCRESPIE,
1147 &wrqu, info->resp_ie);
1148 }
1149
1150 memset(&wrqu, 0, sizeof(wrqu));
1151 wrqu.ap_addr.sa_family = ARPHRD_ETHER;
1152 memcpy(wrqu.ap_addr.sa_data, connected_addr, ETH_ALEN);
1153 memcpy(wdev->wext.prev_bssid, connected_addr, ETH_ALEN);
1154 wdev->wext.prev_bssid_valid = true;
1155 wireless_send_event(wdev->netdev, SIOCGIWAP, &wrqu, NULL);
1156 }
1157#endif
1158
1159 return;
1160out:
1161 for_each_valid_link(info, link)
1162 cfg80211_put_bss(wiphy: wdev->wiphy, bss: info->links[link].bss);
1163}
1164
1165/* Consumes info->links.bss object(s) one way or another */
1166void cfg80211_roamed(struct net_device *dev, struct cfg80211_roam_info *info,
1167 gfp_t gfp)
1168{
1169 struct wireless_dev *wdev = dev->ieee80211_ptr;
1170 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy: wdev->wiphy);
1171 struct cfg80211_event *ev;
1172 unsigned long flags;
1173 u8 *next;
1174 unsigned int link;
1175 size_t link_info_size = 0;
1176 bool bss_not_found = false;
1177
1178 for_each_valid_link(info, link) {
1179 link_info_size += info->links[link].addr ? ETH_ALEN : 0;
1180 link_info_size += info->links[link].bssid ? ETH_ALEN : 0;
1181
1182 if (info->links[link].bss)
1183 continue;
1184
1185 info->links[link].bss =
1186 cfg80211_get_bss(wiphy: wdev->wiphy,
1187 channel: info->links[link].channel,
1188 bssid: info->links[link].bssid,
1189 ssid: wdev->u.client.ssid,
1190 ssid_len: wdev->u.client.ssid_len,
1191 bss_type: wdev->conn_bss_type,
1192 privacy: IEEE80211_PRIVACY_ANY);
1193
1194 if (!info->links[link].bss) {
1195 bss_not_found = true;
1196 break;
1197 }
1198 }
1199
1200 if (WARN_ON(bss_not_found))
1201 goto out;
1202
1203 ev = kzalloc(sizeof(*ev) + info->req_ie_len + info->resp_ie_len +
1204 info->fils.kek_len + info->fils.pmk_len +
1205 (info->fils.pmkid ? WLAN_PMKID_LEN : 0) +
1206 (info->ap_mld_addr ? ETH_ALEN : 0) + link_info_size, gfp);
1207 if (!ev)
1208 goto out;
1209
1210 ev->type = EVENT_ROAMED;
1211 next = ((u8 *)ev) + sizeof(*ev);
1212 if (info->req_ie_len) {
1213 ev->rm.req_ie = next;
1214 ev->rm.req_ie_len = info->req_ie_len;
1215 memcpy(to: (void *)ev->rm.req_ie, from: info->req_ie, len: info->req_ie_len);
1216 next += info->req_ie_len;
1217 }
1218 if (info->resp_ie_len) {
1219 ev->rm.resp_ie = next;
1220 ev->rm.resp_ie_len = info->resp_ie_len;
1221 memcpy(to: (void *)ev->rm.resp_ie, from: info->resp_ie,
1222 len: info->resp_ie_len);
1223 next += info->resp_ie_len;
1224 }
1225 if (info->fils.kek_len) {
1226 ev->rm.fils.kek = next;
1227 ev->rm.fils.kek_len = info->fils.kek_len;
1228 memcpy(to: (void *)ev->rm.fils.kek, from: info->fils.kek,
1229 len: info->fils.kek_len);
1230 next += info->fils.kek_len;
1231 }
1232 if (info->fils.pmk_len) {
1233 ev->rm.fils.pmk = next;
1234 ev->rm.fils.pmk_len = info->fils.pmk_len;
1235 memcpy(to: (void *)ev->rm.fils.pmk, from: info->fils.pmk,
1236 len: info->fils.pmk_len);
1237 next += info->fils.pmk_len;
1238 }
1239 if (info->fils.pmkid) {
1240 ev->rm.fils.pmkid = next;
1241 memcpy(to: (void *)ev->rm.fils.pmkid, from: info->fils.pmkid,
1242 WLAN_PMKID_LEN);
1243 next += WLAN_PMKID_LEN;
1244 }
1245 ev->rm.fils.update_erp_next_seq_num = info->fils.update_erp_next_seq_num;
1246 if (info->fils.update_erp_next_seq_num)
1247 ev->rm.fils.erp_next_seq_num = info->fils.erp_next_seq_num;
1248 if (info->ap_mld_addr) {
1249 ev->rm.ap_mld_addr = next;
1250 memcpy(to: (void *)ev->rm.ap_mld_addr, from: info->ap_mld_addr,
1251 ETH_ALEN);
1252 next += ETH_ALEN;
1253 }
1254 ev->rm.valid_links = info->valid_links;
1255 for_each_valid_link(info, link) {
1256 ev->rm.links[link].bss = info->links[link].bss;
1257
1258 if (info->links[link].addr) {
1259 ev->rm.links[link].addr = next;
1260 memcpy(to: (void *)ev->rm.links[link].addr,
1261 from: info->links[link].addr,
1262 ETH_ALEN);
1263 next += ETH_ALEN;
1264 }
1265
1266 if (info->links[link].bssid) {
1267 ev->rm.links[link].bssid = next;
1268 memcpy(to: (void *)ev->rm.links[link].bssid,
1269 from: info->links[link].bssid,
1270 ETH_ALEN);
1271 next += ETH_ALEN;
1272 }
1273 }
1274
1275 spin_lock_irqsave(&wdev->event_lock, flags);
1276 list_add_tail(new: &ev->list, head: &wdev->event_list);
1277 spin_unlock_irqrestore(lock: &wdev->event_lock, flags);
1278 queue_work(wq: cfg80211_wq, work: &rdev->event_work);
1279
1280 return;
1281out:
1282 for_each_valid_link(info, link)
1283 cfg80211_put_bss(wiphy: wdev->wiphy, bss: info->links[link].bss);
1284
1285}
1286EXPORT_SYMBOL(cfg80211_roamed);
1287
1288void __cfg80211_port_authorized(struct wireless_dev *wdev, const u8 *peer_addr,
1289 const u8 *td_bitmap, u8 td_bitmap_len)
1290{
1291 lockdep_assert_wiphy(wdev->wiphy);
1292
1293 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION &&
1294 wdev->iftype != NL80211_IFTYPE_P2P_CLIENT &&
1295 wdev->iftype != NL80211_IFTYPE_AP &&
1296 wdev->iftype != NL80211_IFTYPE_P2P_GO))
1297 return;
1298
1299 if (wdev->iftype == NL80211_IFTYPE_STATION ||
1300 wdev->iftype == NL80211_IFTYPE_P2P_CLIENT) {
1301 if (WARN_ON(!wdev->connected) ||
1302 WARN_ON(!ether_addr_equal(wdev->u.client.connected_addr, peer_addr)))
1303 return;
1304 }
1305
1306 nl80211_send_port_authorized(rdev: wiphy_to_rdev(wiphy: wdev->wiphy), netdev: wdev->netdev,
1307 peer_addr, td_bitmap, td_bitmap_len);
1308}
1309
1310void cfg80211_port_authorized(struct net_device *dev, const u8 *peer_addr,
1311 const u8 *td_bitmap, u8 td_bitmap_len, gfp_t gfp)
1312{
1313 struct wireless_dev *wdev = dev->ieee80211_ptr;
1314 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy: wdev->wiphy);
1315 struct cfg80211_event *ev;
1316 unsigned long flags;
1317
1318 if (WARN_ON(!peer_addr))
1319 return;
1320
1321 ev = kzalloc(sizeof(*ev) + td_bitmap_len, gfp);
1322 if (!ev)
1323 return;
1324
1325 ev->type = EVENT_PORT_AUTHORIZED;
1326 memcpy(to: ev->pa.peer_addr, from: peer_addr, ETH_ALEN);
1327 ev->pa.td_bitmap = ((u8 *)ev) + sizeof(*ev);
1328 ev->pa.td_bitmap_len = td_bitmap_len;
1329 memcpy(to: (void *)ev->pa.td_bitmap, from: td_bitmap, len: td_bitmap_len);
1330
1331 /*
1332 * Use the wdev event list so that if there are pending
1333 * connected/roamed events, they will be reported first.
1334 */
1335 spin_lock_irqsave(&wdev->event_lock, flags);
1336 list_add_tail(new: &ev->list, head: &wdev->event_list);
1337 spin_unlock_irqrestore(lock: &wdev->event_lock, flags);
1338 queue_work(wq: cfg80211_wq, work: &rdev->event_work);
1339}
1340EXPORT_SYMBOL(cfg80211_port_authorized);
1341
1342void __cfg80211_disconnected(struct net_device *dev, const u8 *ie,
1343 size_t ie_len, u16 reason, bool from_ap)
1344{
1345 struct wireless_dev *wdev = dev->ieee80211_ptr;
1346 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy: wdev->wiphy);
1347 int i;
1348#ifdef CONFIG_CFG80211_WEXT
1349 union iwreq_data wrqu;
1350#endif
1351
1352 lockdep_assert_wiphy(wdev->wiphy);
1353
1354 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION &&
1355 wdev->iftype != NL80211_IFTYPE_P2P_CLIENT))
1356 return;
1357
1358 cfg80211_wdev_release_bsses(wdev);
1359 wdev->valid_links = 0;
1360 wdev->connected = false;
1361 wdev->u.client.ssid_len = 0;
1362 wdev->conn_owner_nlportid = 0;
1363 kfree_sensitive(objp: wdev->connect_keys);
1364 wdev->connect_keys = NULL;
1365
1366 nl80211_send_disconnected(rdev, netdev: dev, reason, ie, ie_len, from_ap);
1367
1368 /* stop critical protocol if supported */
1369 if (rdev->ops->crit_proto_stop && rdev->crit_proto_nlportid) {
1370 rdev->crit_proto_nlportid = 0;
1371 rdev_crit_proto_stop(rdev, wdev);
1372 }
1373
1374 /*
1375 * Delete all the keys ... pairwise keys can't really
1376 * exist any more anyway, but default keys might.
1377 */
1378 if (rdev->ops->del_key) {
1379 int max_key_idx = 5;
1380
1381 if (wiphy_ext_feature_isset(
1382 wiphy: wdev->wiphy,
1383 ftidx: NL80211_EXT_FEATURE_BEACON_PROTECTION) ||
1384 wiphy_ext_feature_isset(
1385 wiphy: wdev->wiphy,
1386 ftidx: NL80211_EXT_FEATURE_BEACON_PROTECTION_CLIENT))
1387 max_key_idx = 7;
1388 for (i = 0; i <= max_key_idx; i++)
1389 rdev_del_key(rdev, netdev: dev, link_id: -1, key_index: i, pairwise: false, NULL);
1390 }
1391
1392 rdev_set_qos_map(rdev, dev, NULL);
1393
1394#ifdef CONFIG_CFG80211_WEXT
1395 memset(&wrqu, 0, sizeof(wrqu));
1396 wrqu.ap_addr.sa_family = ARPHRD_ETHER;
1397 wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL);
1398 wdev->wext.connect.ssid_len = 0;
1399#endif
1400
1401 schedule_work(work: &cfg80211_disconnect_work);
1402
1403 cfg80211_schedule_channels_check(wdev);
1404}
1405
1406void cfg80211_disconnected(struct net_device *dev, u16 reason,
1407 const u8 *ie, size_t ie_len,
1408 bool locally_generated, gfp_t gfp)
1409{
1410 struct wireless_dev *wdev = dev->ieee80211_ptr;
1411 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy: wdev->wiphy);
1412 struct cfg80211_event *ev;
1413 unsigned long flags;
1414
1415 ev = kzalloc(sizeof(*ev) + ie_len, gfp);
1416 if (!ev)
1417 return;
1418
1419 ev->type = EVENT_DISCONNECTED;
1420 ev->dc.ie = ((u8 *)ev) + sizeof(*ev);
1421 ev->dc.ie_len = ie_len;
1422 memcpy(to: (void *)ev->dc.ie, from: ie, len: ie_len);
1423 ev->dc.reason = reason;
1424 ev->dc.locally_generated = locally_generated;
1425
1426 spin_lock_irqsave(&wdev->event_lock, flags);
1427 list_add_tail(new: &ev->list, head: &wdev->event_list);
1428 spin_unlock_irqrestore(lock: &wdev->event_lock, flags);
1429 queue_work(wq: cfg80211_wq, work: &rdev->event_work);
1430}
1431EXPORT_SYMBOL(cfg80211_disconnected);
1432
1433/*
1434 * API calls for nl80211/wext compatibility code
1435 */
1436int cfg80211_connect(struct cfg80211_registered_device *rdev,
1437 struct net_device *dev,
1438 struct cfg80211_connect_params *connect,
1439 struct cfg80211_cached_keys *connkeys,
1440 const u8 *prev_bssid)
1441{
1442 struct wireless_dev *wdev = dev->ieee80211_ptr;
1443 int err;
1444
1445 lockdep_assert_wiphy(wdev->wiphy);
1446
1447 /*
1448 * If we have an ssid_len, we're trying to connect or are
1449 * already connected, so reject a new SSID unless it's the
1450 * same (which is the case for re-association.)
1451 */
1452 if (wdev->u.client.ssid_len &&
1453 (wdev->u.client.ssid_len != connect->ssid_len ||
1454 memcmp(wdev->u.client.ssid, connect->ssid, wdev->u.client.ssid_len)))
1455 return -EALREADY;
1456
1457 /*
1458 * If connected, reject (re-)association unless prev_bssid
1459 * matches the current BSSID.
1460 */
1461 if (wdev->connected) {
1462 if (!prev_bssid)
1463 return -EALREADY;
1464 if (!ether_addr_equal(addr1: prev_bssid,
1465 addr2: wdev->u.client.connected_addr))
1466 return -ENOTCONN;
1467 }
1468
1469 /*
1470 * Reject if we're in the process of connecting with WEP,
1471 * this case isn't very interesting and trying to handle
1472 * it would make the code much more complex.
1473 */
1474 if (wdev->connect_keys)
1475 return -EINPROGRESS;
1476
1477 cfg80211_oper_and_ht_capa(ht_capa: &connect->ht_capa_mask,
1478 ht_capa_mask: rdev->wiphy.ht_capa_mod_mask);
1479 cfg80211_oper_and_vht_capa(vht_capa: &connect->vht_capa_mask,
1480 vht_capa_mask: rdev->wiphy.vht_capa_mod_mask);
1481
1482 if (connkeys && connkeys->def >= 0) {
1483 int idx;
1484 u32 cipher;
1485
1486 idx = connkeys->def;
1487 cipher = connkeys->params[idx].cipher;
1488 /* If given a WEP key we may need it for shared key auth */
1489 if (cipher == WLAN_CIPHER_SUITE_WEP40 ||
1490 cipher == WLAN_CIPHER_SUITE_WEP104) {
1491 connect->key_idx = idx;
1492 connect->key = connkeys->params[idx].key;
1493 connect->key_len = connkeys->params[idx].key_len;
1494
1495 /*
1496 * If ciphers are not set (e.g. when going through
1497 * iwconfig), we have to set them appropriately here.
1498 */
1499 if (connect->crypto.cipher_group == 0)
1500 connect->crypto.cipher_group = cipher;
1501
1502 if (connect->crypto.n_ciphers_pairwise == 0) {
1503 connect->crypto.n_ciphers_pairwise = 1;
1504 connect->crypto.ciphers_pairwise[0] = cipher;
1505 }
1506 }
1507 } else {
1508 if (WARN_ON(connkeys))
1509 return -EINVAL;
1510
1511 /* connect can point to wdev->wext.connect which
1512 * can hold key data from a previous connection
1513 */
1514 connect->key = NULL;
1515 connect->key_len = 0;
1516 connect->key_idx = 0;
1517 }
1518
1519 wdev->connect_keys = connkeys;
1520 memcpy(to: wdev->u.client.ssid, from: connect->ssid, len: connect->ssid_len);
1521 wdev->u.client.ssid_len = connect->ssid_len;
1522
1523 wdev->conn_bss_type = connect->pbss ? IEEE80211_BSS_TYPE_PBSS :
1524 IEEE80211_BSS_TYPE_ESS;
1525
1526 if (!rdev->ops->connect)
1527 err = cfg80211_sme_connect(wdev, connect, prev_bssid);
1528 else
1529 err = rdev_connect(rdev, dev, sme: connect);
1530
1531 if (err) {
1532 wdev->connect_keys = NULL;
1533 /*
1534 * This could be reassoc getting refused, don't clear
1535 * ssid_len in that case.
1536 */
1537 if (!wdev->connected)
1538 wdev->u.client.ssid_len = 0;
1539 return err;
1540 }
1541
1542 return 0;
1543}
1544
1545int cfg80211_disconnect(struct cfg80211_registered_device *rdev,
1546 struct net_device *dev, u16 reason, bool wextev)
1547{
1548 struct wireless_dev *wdev = dev->ieee80211_ptr;
1549 int err = 0;
1550
1551 lockdep_assert_wiphy(wdev->wiphy);
1552
1553 kfree_sensitive(objp: wdev->connect_keys);
1554 wdev->connect_keys = NULL;
1555
1556 wdev->conn_owner_nlportid = 0;
1557
1558 if (wdev->conn)
1559 err = cfg80211_sme_disconnect(wdev, reason);
1560 else if (!rdev->ops->disconnect)
1561 cfg80211_mlme_down(rdev, dev);
1562 else if (wdev->u.client.ssid_len)
1563 err = rdev_disconnect(rdev, dev, reason_code: reason);
1564
1565 /*
1566 * Clear ssid_len unless we actually were fully connected,
1567 * in which case cfg80211_disconnected() will take care of
1568 * this later.
1569 */
1570 if (!wdev->connected)
1571 wdev->u.client.ssid_len = 0;
1572
1573 return err;
1574}
1575
1576/*
1577 * Used to clean up after the connection / connection attempt owner socket
1578 * disconnects
1579 */
1580void cfg80211_autodisconnect_wk(struct work_struct *work)
1581{
1582 struct wireless_dev *wdev =
1583 container_of(work, struct wireless_dev, disconnect_wk);
1584 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy: wdev->wiphy);
1585
1586 guard(wiphy)(T: wdev->wiphy);
1587
1588 if (wdev->conn_owner_nlportid) {
1589 switch (wdev->iftype) {
1590 case NL80211_IFTYPE_ADHOC:
1591 cfg80211_leave_ibss(rdev, dev: wdev->netdev, nowext: false);
1592 break;
1593 case NL80211_IFTYPE_AP:
1594 case NL80211_IFTYPE_P2P_GO:
1595 cfg80211_stop_ap(rdev, dev: wdev->netdev, link: -1, notify: false);
1596 break;
1597 case NL80211_IFTYPE_MESH_POINT:
1598 cfg80211_leave_mesh(rdev, dev: wdev->netdev);
1599 break;
1600 case NL80211_IFTYPE_STATION:
1601 case NL80211_IFTYPE_P2P_CLIENT:
1602 /*
1603 * Use disconnect_bssid if still connecting and
1604 * ops->disconnect not implemented. Otherwise we can
1605 * use cfg80211_disconnect.
1606 */
1607 if (rdev->ops->disconnect || wdev->connected)
1608 cfg80211_disconnect(rdev, dev: wdev->netdev,
1609 reason: WLAN_REASON_DEAUTH_LEAVING,
1610 wextev: true);
1611 else
1612 cfg80211_mlme_deauth(rdev, dev: wdev->netdev,
1613 bssid: wdev->disconnect_bssid,
1614 NULL, ie_len: 0,
1615 reason: WLAN_REASON_DEAUTH_LEAVING,
1616 local_state_change: false);
1617 break;
1618 default:
1619 break;
1620 }
1621 }
1622}
1623