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printf: Remove unused 'bprintf'
[drm/drm-misc.git] / net / wireless / sme.c
blob431da30817a6f6321238fd94f834d3c64127c50c
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
31 struct 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
54 static 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
64 static 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 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(request);
93 return -EINVAL;
94 }
95 request->channels[0] = wdev->conn->params.channel;
96 request->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->channels[i++] = channel;
112 }
113 request->rates[band] = (1 << bands->n_bitrates) - 1;
114 }
115 n_channels = i;
116 }
117 request->n_channels = n_channels;
118 request->ssids = (void *)request +
119 struct_size(request, channels, n_channels);
120 request->n_ssids = 1;
121
122 memcpy(request->ssids[0].ssid, wdev->conn->params.ssid,
123 wdev->conn->params.ssid_len);
124 request->ssids[0].ssid_len = wdev->conn->params.ssid_len;
125
126 eth_broadcast_addr(request->bssid);
127
128 request->wdev = wdev;
129 request->wiphy = &rdev->wiphy;
130 request->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(wdev->netdev);
139 } else {
140 rdev->scan_req = NULL;
141 kfree(request);
142 }
143 return err;
144 }
145
146 static 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(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(&rdev->wiphy, params->channel,
177 params->bssid,
178 params->ssid, params->ssid_len,
179 IEEE80211_BSS_TYPE_ESS,
180 IEEE80211_PRIVACY_ANY);
181 auth_req.link_id = -1;
182 err = cfg80211_mlme_auth(rdev, wdev->netdev, &auth_req);
183 cfg80211_put_bss(&rdev->wiphy, 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(&rdev->wiphy, params->channel,
206 params->bssid,
207 params->ssid, params->ssid_len,
208 IEEE80211_BSS_TYPE_ESS,
209 IEEE80211_PRIVACY_ANY);
210 if (!req.bss) {
211 err = -ENOENT;
212 } else {
213 err = cfg80211_mlme_assoc(rdev, wdev->netdev,
214 &req, NULL);
215 cfg80211_put_bss(&rdev->wiphy, req.bss);
216 }
217
218 if (err)
219 cfg80211_mlme_deauth(rdev, wdev->netdev, params->bssid,
220 NULL, 0,
221 WLAN_REASON_DEAUTH_LEAVING,
222 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, wdev->netdev, params->bssid,
229 NULL, 0,
230 WLAN_REASON_DEAUTH_LEAVING, false);
231 return -ENOTCONN;
232 case CFG80211_CONN_DEAUTH:
233 cfg80211_mlme_deauth(rdev, wdev->netdev, params->bssid,
234 NULL, 0,
235 WLAN_REASON_DEAUTH_LEAVING, 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
246 void 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 wiphy_lock(&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(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(bssid_buf, wdev->conn->params.bssid, ETH_ALEN);
269 bssid = bssid_buf;
270 }
271 treason = NL80211_TIMEOUT_UNSPECIFIED;
272 if (cfg80211_conn_do_work(wdev, &treason)) {
273 struct cfg80211_connect_resp_params cr;
274
275 memset(&cr, 0, sizeof(cr));
276 cr.status = -1;
277 cr.links[0].bssid = bssid;
278 cr.timeout_reason = treason;
279 __cfg80211_connect_result(wdev->netdev, &cr, false);
280 }
281 }
282
283 wiphy_unlock(&rdev->wiphy);
284 }
285
286 static void cfg80211_step_auth_next(struct cfg80211_conn *conn,
287 struct cfg80211_bss *bss)
288 {
289 memcpy(conn->bssid, bss->bssid, ETH_ALEN);
290 conn->params.bssid = conn->bssid;
291 conn->params.channel = bss->channel;
292 conn->state = CFG80211_CONN_AUTHENTICATE_NEXT;
293 }
294
295 /* Returned bss is reference counted and must be cleaned up appropriately. */
296 static struct cfg80211_bss *cfg80211_get_conn_bss(struct wireless_dev *wdev)
297 {
298 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
299 struct cfg80211_bss *bss;
300
301 lockdep_assert_wiphy(wdev->wiphy);
302
303 bss = cfg80211_get_bss(wdev->wiphy, wdev->conn->params.channel,
304 wdev->conn->params.bssid,
305 wdev->conn->params.ssid,
306 wdev->conn->params.ssid_len,
307 wdev->conn_bss_type,
308 IEEE80211_PRIVACY(wdev->conn->params.privacy));
309 if (!bss)
310 return NULL;
311
312 cfg80211_step_auth_next(wdev->conn, bss);
313 schedule_work(&rdev->conn_work);
314
315 return bss;
316 }
317
318 void cfg80211_sme_scan_done(struct net_device *dev)
319 {
320 struct wireless_dev *wdev = dev->ieee80211_ptr;
321 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
322 struct cfg80211_bss *bss;
323
324 lockdep_assert_wiphy(wdev->wiphy);
325
326 if (!wdev->conn)
327 return;
328
329 if (wdev->conn->state != CFG80211_CONN_SCANNING &&
330 wdev->conn->state != CFG80211_CONN_SCAN_AGAIN)
331 return;
332
333 bss = cfg80211_get_conn_bss(wdev);
334 if (bss)
335 cfg80211_put_bss(&rdev->wiphy, bss);
336 else
337 schedule_work(&rdev->conn_work);
338 }
339
340 void cfg80211_sme_rx_auth(struct wireless_dev *wdev, const u8 *buf, size_t len)
341 {
342 struct wiphy *wiphy = wdev->wiphy;
343 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
344 struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)buf;
345 u16 status_code = le16_to_cpu(mgmt->u.auth.status_code);
346
347 lockdep_assert_wiphy(wdev->wiphy);
348
349 if (!wdev->conn || wdev->conn->state == CFG80211_CONN_CONNECTED)
350 return;
351
352 if (status_code == WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG &&
353 wdev->conn->auto_auth &&
354 wdev->conn->params.auth_type != NL80211_AUTHTYPE_NETWORK_EAP) {
355 /* select automatically between only open, shared, leap */
356 switch (wdev->conn->params.auth_type) {
357 case NL80211_AUTHTYPE_OPEN_SYSTEM:
358 if (wdev->connect_keys)
359 wdev->conn->params.auth_type =
360 NL80211_AUTHTYPE_SHARED_KEY;
361 else
362 wdev->conn->params.auth_type =
363 NL80211_AUTHTYPE_NETWORK_EAP;
364 break;
365 case NL80211_AUTHTYPE_SHARED_KEY:
366 wdev->conn->params.auth_type =
367 NL80211_AUTHTYPE_NETWORK_EAP;
368 break;
369 default:
370 /* huh? */
371 wdev->conn->params.auth_type =
372 NL80211_AUTHTYPE_OPEN_SYSTEM;
373 break;
374 }
375 wdev->conn->state = CFG80211_CONN_AUTHENTICATE_NEXT;
376 schedule_work(&rdev->conn_work);
377 } else if (status_code != WLAN_STATUS_SUCCESS) {
378 struct cfg80211_connect_resp_params cr;
379
380 memset(&cr, 0, sizeof(cr));
381 cr.status = status_code;
382 cr.links[0].bssid = mgmt->bssid;
383 cr.timeout_reason = NL80211_TIMEOUT_UNSPECIFIED;
384 __cfg80211_connect_result(wdev->netdev, &cr, false);
385 } else if (wdev->conn->state == CFG80211_CONN_AUTHENTICATING) {
386 wdev->conn->state = CFG80211_CONN_ASSOCIATE_NEXT;
387 schedule_work(&rdev->conn_work);
388 }
389 }
390
391 bool cfg80211_sme_rx_assoc_resp(struct wireless_dev *wdev, u16 status)
392 {
393 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
394
395 if (!wdev->conn)
396 return false;
397
398 if (status == WLAN_STATUS_SUCCESS) {
399 wdev->conn->state = CFG80211_CONN_CONNECTED;
400 return false;
401 }
402
403 if (wdev->conn->prev_bssid_valid) {
404 /*
405 * Some stupid APs don't accept reassoc, so we
406 * need to fall back to trying regular assoc;
407 * return true so no event is sent to userspace.
408 */
409 wdev->conn->prev_bssid_valid = false;
410 wdev->conn->state = CFG80211_CONN_ASSOCIATE_NEXT;
411 schedule_work(&rdev->conn_work);
412 return true;
413 }
414
415 wdev->conn->state = CFG80211_CONN_ASSOC_FAILED;
416 schedule_work(&rdev->conn_work);
417 return false;
418 }
419
420 void cfg80211_sme_deauth(struct wireless_dev *wdev)
421 {
422 cfg80211_sme_free(wdev);
423 }
424
425 void cfg80211_sme_auth_timeout(struct wireless_dev *wdev)
426 {
427 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
428
429 if (!wdev->conn)
430 return;
431
432 wdev->conn->state = CFG80211_CONN_AUTH_FAILED_TIMEOUT;
433 schedule_work(&rdev->conn_work);
434 }
435
436 void cfg80211_sme_disassoc(struct wireless_dev *wdev)
437 {
438 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
439
440 if (!wdev->conn)
441 return;
442
443 wdev->conn->state = CFG80211_CONN_DEAUTH;
444 schedule_work(&rdev->conn_work);
445 }
446
447 void cfg80211_sme_assoc_timeout(struct wireless_dev *wdev)
448 {
449 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
450
451 if (!wdev->conn)
452 return;
453
454 wdev->conn->state = CFG80211_CONN_ASSOC_FAILED_TIMEOUT;
455 schedule_work(&rdev->conn_work);
456 }
457
458 void cfg80211_sme_abandon_assoc(struct wireless_dev *wdev)
459 {
460 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
461
462 if (!wdev->conn)
463 return;
464
465 wdev->conn->state = CFG80211_CONN_ABANDON;
466 schedule_work(&rdev->conn_work);
467 }
468
469 static void cfg80211_wdev_release_bsses(struct wireless_dev *wdev)
470 {
471 unsigned int link;
472
473 for_each_valid_link(wdev, link) {
474 if (!wdev->links[link].client.current_bss)
475 continue;
476 cfg80211_unhold_bss(wdev->links[link].client.current_bss);
477 cfg80211_put_bss(wdev->wiphy,
478 &wdev->links[link].client.current_bss->pub);
479 wdev->links[link].client.current_bss = NULL;
480 }
481 }
482
483 void cfg80211_wdev_release_link_bsses(struct wireless_dev *wdev, u16 link_mask)
484 {
485 unsigned int link;
486
487 for_each_valid_link(wdev, link) {
488 if (!wdev->links[link].client.current_bss ||
489 !(link_mask & BIT(link)))
490 continue;
491 cfg80211_unhold_bss(wdev->links[link].client.current_bss);
492 cfg80211_put_bss(wdev->wiphy,
493 &wdev->links[link].client.current_bss->pub);
494 wdev->links[link].client.current_bss = NULL;
495 }
496 }
497
498 static int cfg80211_sme_get_conn_ies(struct wireless_dev *wdev,
499 const u8 *ies, size_t ies_len,
500 const u8 **out_ies, size_t *out_ies_len)
501 {
502 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
503 u8 *buf;
504 size_t offs;
505
506 if (!rdev->wiphy.extended_capabilities_len ||
507 (ies && cfg80211_find_ie(WLAN_EID_EXT_CAPABILITY, ies, ies_len))) {
508 *out_ies = kmemdup(ies, ies_len, GFP_KERNEL);
509 if (!*out_ies)
510 return -ENOMEM;
511 *out_ies_len = ies_len;
512 return 0;
513 }
514
515 buf = kmalloc(ies_len + rdev->wiphy.extended_capabilities_len + 2,
516 GFP_KERNEL);
517 if (!buf)
518 return -ENOMEM;
519
520 if (ies_len) {
521 static const u8 before_extcapa[] = {
522 /* not listing IEs expected to be created by driver */
523 WLAN_EID_RSN,
524 WLAN_EID_QOS_CAPA,
525 WLAN_EID_RRM_ENABLED_CAPABILITIES,
526 WLAN_EID_MOBILITY_DOMAIN,
527 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
528 WLAN_EID_BSS_COEX_2040,
529 };
530
531 offs = ieee80211_ie_split(ies, ies_len, before_extcapa,
532 ARRAY_SIZE(before_extcapa), 0);
533 memcpy(buf, ies, offs);
534 /* leave a whole for extended capabilities IE */
535 memcpy(buf + offs + rdev->wiphy.extended_capabilities_len + 2,
536 ies + offs, ies_len - offs);
537 } else {
538 offs = 0;
539 }
540
541 /* place extended capabilities IE (with only driver capabilities) */
542 buf[offs] = WLAN_EID_EXT_CAPABILITY;
543 buf[offs + 1] = rdev->wiphy.extended_capabilities_len;
544 memcpy(buf + offs + 2,
545 rdev->wiphy.extended_capabilities,
546 rdev->wiphy.extended_capabilities_len);
547
548 *out_ies = buf;
549 *out_ies_len = ies_len + rdev->wiphy.extended_capabilities_len + 2;
550
551 return 0;
552 }
553
554 static int cfg80211_sme_connect(struct wireless_dev *wdev,
555 struct cfg80211_connect_params *connect,
556 const u8 *prev_bssid)
557 {
558 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
559 struct cfg80211_bss *bss;
560 int err;
561
562 if (!rdev->ops->auth || !rdev->ops->assoc)
563 return -EOPNOTSUPP;
564
565 cfg80211_wdev_release_bsses(wdev);
566
567 if (wdev->connected) {
568 cfg80211_sme_free(wdev);
569 wdev->connected = false;
570 }
571
572 if (wdev->conn)
573 return -EINPROGRESS;
574
575 wdev->conn = kzalloc(sizeof(*wdev->conn), GFP_KERNEL);
576 if (!wdev->conn)
577 return -ENOMEM;
578
579 /*
580 * Copy all parameters, and treat explicitly IEs, BSSID, SSID.
581 */
582 memcpy(&wdev->conn->params, connect, sizeof(*connect));
583 if (connect->bssid) {
584 wdev->conn->params.bssid = wdev->conn->bssid;
585 memcpy(wdev->conn->bssid, connect->bssid, ETH_ALEN);
586 }
587
588 if (cfg80211_sme_get_conn_ies(wdev, connect->ie, connect->ie_len,
589 &wdev->conn->ie,
590 &wdev->conn->params.ie_len)) {
591 kfree(wdev->conn);
592 wdev->conn = NULL;
593 return -ENOMEM;
594 }
595 wdev->conn->params.ie = wdev->conn->ie;
596
597 if (connect->auth_type == NL80211_AUTHTYPE_AUTOMATIC) {
598 wdev->conn->auto_auth = true;
599 /* start with open system ... should mostly work */
600 wdev->conn->params.auth_type =
601 NL80211_AUTHTYPE_OPEN_SYSTEM;
602 } else {
603 wdev->conn->auto_auth = false;
604 }
605
606 wdev->conn->params.ssid = wdev->u.client.ssid;
607 wdev->conn->params.ssid_len = wdev->u.client.ssid_len;
608
609 /* see if we have the bss already */
610 bss = cfg80211_get_bss(wdev->wiphy, wdev->conn->params.channel,
611 wdev->conn->params.bssid,
612 wdev->conn->params.ssid,
613 wdev->conn->params.ssid_len,
614 wdev->conn_bss_type,
615 IEEE80211_PRIVACY(wdev->conn->params.privacy));
616
617 if (prev_bssid) {
618 memcpy(wdev->conn->prev_bssid, prev_bssid, ETH_ALEN);
619 wdev->conn->prev_bssid_valid = true;
620 }
621
622 /* we're good if we have a matching bss struct */
623 if (bss) {
624 enum nl80211_timeout_reason treason;
625
626 cfg80211_step_auth_next(wdev->conn, bss);
627 err = cfg80211_conn_do_work(wdev, &treason);
628 cfg80211_put_bss(wdev->wiphy, bss);
629 } else {
630 /* otherwise we'll need to scan for the AP first */
631 err = cfg80211_conn_scan(wdev);
632
633 /*
634 * If we can't scan right now, then we need to scan again
635 * after the current scan finished, since the parameters
636 * changed (unless we find a good AP anyway).
637 */
638 if (err == -EBUSY) {
639 err = 0;
640 wdev->conn->state = CFG80211_CONN_SCAN_AGAIN;
641 }
642 }
643
644 if (err)
645 cfg80211_sme_free(wdev);
646
647 return err;
648 }
649
650 static int cfg80211_sme_disconnect(struct wireless_dev *wdev, u16 reason)
651 {
652 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
653 int err;
654
655 if (!wdev->conn)
656 return 0;
657
658 if (!rdev->ops->deauth)
659 return -EOPNOTSUPP;
660
661 if (wdev->conn->state == CFG80211_CONN_SCANNING ||
662 wdev->conn->state == CFG80211_CONN_SCAN_AGAIN) {
663 err = 0;
664 goto out;
665 }
666
667 /* wdev->conn->params.bssid must be set if > SCANNING */
668 err = cfg80211_mlme_deauth(rdev, wdev->netdev,
669 wdev->conn->params.bssid,
670 NULL, 0, reason, false);
671 out:
672 cfg80211_sme_free(wdev);
673 return err;
674 }
675
676 /*
677 * code shared for in-device and software SME
678 */
679
680 static bool cfg80211_is_all_idle(void)
681 {
682 struct cfg80211_registered_device *rdev;
683 struct wireless_dev *wdev;
684 bool is_all_idle = true;
685
686 /*
687 * All devices must be idle as otherwise if you are actively
688 * scanning some new beacon hints could be learned and would
689 * count as new regulatory hints.
690 * Also if there is any other active beaconing interface we
691 * need not issue a disconnect hint and reset any info such
692 * as chan dfs state, etc.
693 */
694 for_each_rdev(rdev) {
695 wiphy_lock(&rdev->wiphy);
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 wiphy_unlock(&rdev->wiphy);
702 }
703
704 return is_all_idle;
705 }
706
707 static void disconnect_work(struct work_struct *work)
708 {
709 rtnl_lock();
710 if (cfg80211_is_all_idle())
711 regulatory_hint_disconnect();
712 rtnl_unlock();
713 }
714
715 DECLARE_WORK(cfg80211_disconnect_work, disconnect_work);
716
717 static void
718 cfg80211_connect_result_release_bsses(struct wireless_dev *wdev,
719 struct cfg80211_connect_resp_params *cr)
720 {
721 unsigned int link;
722
723 for_each_valid_link(cr, link) {
724 if (!cr->links[link].bss)
725 continue;
726 cfg80211_unhold_bss(bss_from_pub(cr->links[link].bss));
727 cfg80211_put_bss(wdev->wiphy, cr->links[link].bss);
728 }
729 }
730
731 /*
732 * API calls for drivers implementing connect/disconnect and
733 * SME event handling
734 */
735
736 /* This method must consume bss one way or another */
737 void __cfg80211_connect_result(struct net_device *dev,
738 struct cfg80211_connect_resp_params *cr,
739 bool wextev)
740 {
741 struct wireless_dev *wdev = dev->ieee80211_ptr;
742 const struct element *country_elem = NULL;
743 const struct element *ssid;
744 const u8 *country_data;
745 u8 country_datalen;
746 #ifdef CONFIG_CFG80211_WEXT
747 union iwreq_data wrqu;
748 #endif
749 unsigned int link;
750 const u8 *connected_addr;
751 bool bss_not_found = false;
752
753 lockdep_assert_wiphy(wdev->wiphy);
754
755 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION &&
756 wdev->iftype != NL80211_IFTYPE_P2P_CLIENT))
757 goto out;
758
759 if (cr->valid_links) {
760 if (WARN_ON(!cr->ap_mld_addr))
761 goto out;
762
763 for_each_valid_link(cr, link) {
764 if (WARN_ON(!cr->links[link].addr))
765 goto out;
766 }
767
768 if (WARN_ON(wdev->connect_keys))
769 goto out;
770 }
771
772 wdev->unprot_beacon_reported = 0;
773 nl80211_send_connect_result(wiphy_to_rdev(wdev->wiphy), dev, cr,
774 GFP_KERNEL);
775 connected_addr = cr->valid_links ? cr->ap_mld_addr : cr->links[0].bssid;
776
777 #ifdef CONFIG_CFG80211_WEXT
778 if (wextev && !cr->valid_links) {
779 if (cr->req_ie && cr->status == WLAN_STATUS_SUCCESS) {
780 memset(&wrqu, 0, sizeof(wrqu));
781 wrqu.data.length = cr->req_ie_len;
782 wireless_send_event(dev, IWEVASSOCREQIE, &wrqu,
783 cr->req_ie);
784 }
785
786 if (cr->resp_ie && cr->status == WLAN_STATUS_SUCCESS) {
787 memset(&wrqu, 0, sizeof(wrqu));
788 wrqu.data.length = cr->resp_ie_len;
789 wireless_send_event(dev, IWEVASSOCRESPIE, &wrqu,
790 cr->resp_ie);
791 }
792
793 memset(&wrqu, 0, sizeof(wrqu));
794 wrqu.ap_addr.sa_family = ARPHRD_ETHER;
795 if (connected_addr && cr->status == WLAN_STATUS_SUCCESS) {
796 memcpy(wrqu.ap_addr.sa_data, connected_addr, ETH_ALEN);
797 memcpy(wdev->wext.prev_bssid, connected_addr, ETH_ALEN);
798 wdev->wext.prev_bssid_valid = true;
799 }
800 wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL);
801 }
802 #endif
803
804 if (cr->status == WLAN_STATUS_SUCCESS) {
805 if (!wiphy_to_rdev(wdev->wiphy)->ops->connect) {
806 for_each_valid_link(cr, link) {
807 if (WARN_ON_ONCE(!cr->links[link].bss))
808 break;
809 }
810 }
811
812 for_each_valid_link(cr, link) {
813 /* don't do extra lookups for failures */
814 if (cr->links[link].status != WLAN_STATUS_SUCCESS)
815 continue;
816
817 if (cr->links[link].bss)
818 continue;
819
820 cr->links[link].bss =
821 cfg80211_get_bss(wdev->wiphy, NULL,
822 cr->links[link].bssid,
823 wdev->u.client.ssid,
824 wdev->u.client.ssid_len,
825 wdev->conn_bss_type,
826 IEEE80211_PRIVACY_ANY);
827 if (!cr->links[link].bss) {
828 bss_not_found = true;
829 break;
830 }
831 cfg80211_hold_bss(bss_from_pub(cr->links[link].bss));
832 }
833 }
834
835 cfg80211_wdev_release_bsses(wdev);
836
837 if (cr->status != WLAN_STATUS_SUCCESS) {
838 kfree_sensitive(wdev->connect_keys);
839 wdev->connect_keys = NULL;
840 wdev->u.client.ssid_len = 0;
841 wdev->conn_owner_nlportid = 0;
842 cfg80211_connect_result_release_bsses(wdev, cr);
843 cfg80211_sme_free(wdev);
844 return;
845 }
846
847 if (WARN_ON(bss_not_found)) {
848 cfg80211_connect_result_release_bsses(wdev, cr);
849 return;
850 }
851
852 memset(wdev->links, 0, sizeof(wdev->links));
853 for_each_valid_link(cr, link) {
854 if (cr->links[link].status == WLAN_STATUS_SUCCESS)
855 continue;
856 cr->valid_links &= ~BIT(link);
857 /* don't require bss pointer for failed links */
858 if (!cr->links[link].bss)
859 continue;
860 cfg80211_unhold_bss(bss_from_pub(cr->links[link].bss));
861 cfg80211_put_bss(wdev->wiphy, cr->links[link].bss);
862 }
863 wdev->valid_links = cr->valid_links;
864 for_each_valid_link(cr, link)
865 wdev->links[link].client.current_bss =
866 bss_from_pub(cr->links[link].bss);
867 wdev->connected = true;
868 ether_addr_copy(wdev->u.client.connected_addr, connected_addr);
869 if (cr->valid_links) {
870 for_each_valid_link(cr, link)
871 memcpy(wdev->links[link].addr, cr->links[link].addr,
872 ETH_ALEN);
873 }
874
875 cfg80211_upload_connect_keys(wdev);
876
877 rcu_read_lock();
878 for_each_valid_link(cr, link) {
879 country_elem =
880 ieee80211_bss_get_elem(cr->links[link].bss,
881 WLAN_EID_COUNTRY);
882 if (country_elem)
883 break;
884 }
885 if (!country_elem) {
886 rcu_read_unlock();
887 return;
888 }
889
890 country_datalen = country_elem->datalen;
891 country_data = kmemdup(country_elem->data, country_datalen, GFP_ATOMIC);
892 rcu_read_unlock();
893
894 if (!country_data)
895 return;
896
897 regulatory_hint_country_ie(wdev->wiphy,
898 cr->links[link].bss->channel->band,
899 country_data, country_datalen);
900 kfree(country_data);
901
902 if (!wdev->u.client.ssid_len) {
903 rcu_read_lock();
904 for_each_valid_link(cr, link) {
905 ssid = ieee80211_bss_get_elem(cr->links[link].bss,
906 WLAN_EID_SSID);
907
908 if (!ssid || !ssid->datalen)
909 continue;
910
911 memcpy(wdev->u.client.ssid, ssid->data, ssid->datalen);
912 wdev->u.client.ssid_len = ssid->datalen;
913 break;
914 }
915 rcu_read_unlock();
916 }
917
918 return;
919 out:
920 for_each_valid_link(cr, link)
921 cfg80211_put_bss(wdev->wiphy, cr->links[link].bss);
922 }
923
924 static void cfg80211_update_link_bss(struct wireless_dev *wdev,
925 struct cfg80211_bss **bss)
926 {
927 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
928 struct cfg80211_internal_bss *ibss;
929
930 if (!*bss)
931 return;
932
933 ibss = bss_from_pub(*bss);
934 if (list_empty(&ibss->list)) {
935 struct cfg80211_bss *found = NULL, *tmp = *bss;
936
937 found = cfg80211_get_bss(wdev->wiphy, NULL,
938 (*bss)->bssid,
939 wdev->u.client.ssid,
940 wdev->u.client.ssid_len,
941 wdev->conn_bss_type,
942 IEEE80211_PRIVACY_ANY);
943 if (found) {
944 /* The same BSS is already updated so use it
945 * instead, as it has latest info.
946 */
947 *bss = found;
948 } else {
949 /* Update with BSS provided by driver, it will
950 * be freshly added and ref cnted, we can free
951 * the old one.
952 *
953 * signal_valid can be false, as we are not
954 * expecting the BSS to be found.
955 *
956 * keep the old timestamp to avoid confusion
957 */
958 cfg80211_bss_update(rdev, ibss, false,
959 ibss->ts);
960 }
961
962 cfg80211_put_bss(wdev->wiphy, tmp);
963 }
964 }
965
966 /* Consumes bss object(s) one way or another */
967 void cfg80211_connect_done(struct net_device *dev,
968 struct cfg80211_connect_resp_params *params,
969 gfp_t gfp)
970 {
971 struct wireless_dev *wdev = dev->ieee80211_ptr;
972 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
973 struct cfg80211_event *ev;
974 unsigned long flags;
975 u8 *next;
976 size_t link_info_size = 0;
977 unsigned int link;
978
979 for_each_valid_link(params, link) {
980 cfg80211_update_link_bss(wdev, &params->links[link].bss);
981 link_info_size += params->links[link].bssid ? ETH_ALEN : 0;
982 link_info_size += params->links[link].addr ? ETH_ALEN : 0;
983 }
984
985 ev = kzalloc(sizeof(*ev) + (params->ap_mld_addr ? ETH_ALEN : 0) +
986 params->req_ie_len + params->resp_ie_len +
987 params->fils.kek_len + params->fils.pmk_len +
988 (params->fils.pmkid ? WLAN_PMKID_LEN : 0) + link_info_size,
989 gfp);
990
991 if (!ev) {
992 for_each_valid_link(params, link)
993 cfg80211_put_bss(wdev->wiphy,
994 params->links[link].bss);
995 return;
996 }
997
998 ev->type = EVENT_CONNECT_RESULT;
999 next = ((u8 *)ev) + sizeof(*ev);
1000 if (params->ap_mld_addr) {
1001 ev->cr.ap_mld_addr = next;
1002 memcpy((void *)ev->cr.ap_mld_addr, params->ap_mld_addr,
1003 ETH_ALEN);
1004 next += ETH_ALEN;
1005 }
1006 if (params->req_ie_len) {
1007 ev->cr.req_ie = next;
1008 ev->cr.req_ie_len = params->req_ie_len;
1009 memcpy((void *)ev->cr.req_ie, params->req_ie,
1010 params->req_ie_len);
1011 next += params->req_ie_len;
1012 }
1013 if (params->resp_ie_len) {
1014 ev->cr.resp_ie = next;
1015 ev->cr.resp_ie_len = params->resp_ie_len;
1016 memcpy((void *)ev->cr.resp_ie, params->resp_ie,
1017 params->resp_ie_len);
1018 next += params->resp_ie_len;
1019 }
1020 if (params->fils.kek_len) {
1021 ev->cr.fils.kek = next;
1022 ev->cr.fils.kek_len = params->fils.kek_len;
1023 memcpy((void *)ev->cr.fils.kek, params->fils.kek,
1024 params->fils.kek_len);
1025 next += params->fils.kek_len;
1026 }
1027 if (params->fils.pmk_len) {
1028 ev->cr.fils.pmk = next;
1029 ev->cr.fils.pmk_len = params->fils.pmk_len;
1030 memcpy((void *)ev->cr.fils.pmk, params->fils.pmk,
1031 params->fils.pmk_len);
1032 next += params->fils.pmk_len;
1033 }
1034 if (params->fils.pmkid) {
1035 ev->cr.fils.pmkid = next;
1036 memcpy((void *)ev->cr.fils.pmkid, params->fils.pmkid,
1037 WLAN_PMKID_LEN);
1038 next += WLAN_PMKID_LEN;
1039 }
1040 ev->cr.fils.update_erp_next_seq_num = params->fils.update_erp_next_seq_num;
1041 if (params->fils.update_erp_next_seq_num)
1042 ev->cr.fils.erp_next_seq_num = params->fils.erp_next_seq_num;
1043 ev->cr.valid_links = params->valid_links;
1044 for_each_valid_link(params, link) {
1045 if (params->links[link].bss)
1046 cfg80211_hold_bss(
1047 bss_from_pub(params->links[link].bss));
1048 ev->cr.links[link].bss = params->links[link].bss;
1049 ev->cr.links[link].status = params->links[link].status;
1050
1051 if (params->links[link].addr) {
1052 ev->cr.links[link].addr = next;
1053 memcpy((void *)ev->cr.links[link].addr,
1054 params->links[link].addr,
1055 ETH_ALEN);
1056 next += ETH_ALEN;
1057 }
1058 if (params->links[link].bssid) {
1059 ev->cr.links[link].bssid = next;
1060 memcpy((void *)ev->cr.links[link].bssid,
1061 params->links[link].bssid,
1062 ETH_ALEN);
1063 next += ETH_ALEN;
1064 }
1065 }
1066 ev->cr.status = params->status;
1067 ev->cr.timeout_reason = params->timeout_reason;
1068
1069 spin_lock_irqsave(&wdev->event_lock, flags);
1070 list_add_tail(&ev->list, &wdev->event_list);
1071 spin_unlock_irqrestore(&wdev->event_lock, flags);
1072 queue_work(cfg80211_wq, &rdev->event_work);
1073 }
1074 EXPORT_SYMBOL(cfg80211_connect_done);
1075
1076 /* Consumes bss object one way or another */
1077 void __cfg80211_roamed(struct wireless_dev *wdev,
1078 struct cfg80211_roam_info *info)
1079 {
1080 #ifdef CONFIG_CFG80211_WEXT
1081 union iwreq_data wrqu;
1082 #endif
1083 unsigned int link;
1084 const u8 *connected_addr;
1085
1086 lockdep_assert_wiphy(wdev->wiphy);
1087
1088 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION &&
1089 wdev->iftype != NL80211_IFTYPE_P2P_CLIENT))
1090 goto out;
1091
1092 if (WARN_ON(!wdev->connected))
1093 goto out;
1094
1095 if (info->valid_links) {
1096 if (WARN_ON(!info->ap_mld_addr))
1097 goto out;
1098
1099 for_each_valid_link(info, link) {
1100 if (WARN_ON(!info->links[link].addr))
1101 goto out;
1102 }
1103 }
1104
1105 cfg80211_wdev_release_bsses(wdev);
1106
1107 for_each_valid_link(info, link) {
1108 if (WARN_ON(!info->links[link].bss))
1109 goto out;
1110 }
1111
1112 memset(wdev->links, 0, sizeof(wdev->links));
1113 wdev->valid_links = info->valid_links;
1114 for_each_valid_link(info, link) {
1115 cfg80211_hold_bss(bss_from_pub(info->links[link].bss));
1116 wdev->links[link].client.current_bss =
1117 bss_from_pub(info->links[link].bss);
1118 }
1119
1120 connected_addr = info->valid_links ?
1121 info->ap_mld_addr :
1122 info->links[0].bss->bssid;
1123 ether_addr_copy(wdev->u.client.connected_addr, connected_addr);
1124 if (info->valid_links) {
1125 for_each_valid_link(info, link)
1126 memcpy(wdev->links[link].addr, info->links[link].addr,
1127 ETH_ALEN);
1128 }
1129 wdev->unprot_beacon_reported = 0;
1130 nl80211_send_roamed(wiphy_to_rdev(wdev->wiphy),
1131 wdev->netdev, info, GFP_KERNEL);
1132
1133 #ifdef CONFIG_CFG80211_WEXT
1134 if (!info->valid_links) {
1135 if (info->req_ie) {
1136 memset(&wrqu, 0, sizeof(wrqu));
1137 wrqu.data.length = info->req_ie_len;
1138 wireless_send_event(wdev->netdev, IWEVASSOCREQIE,
1139 &wrqu, info->req_ie);
1140 }
1141
1142 if (info->resp_ie) {
1143 memset(&wrqu, 0, sizeof(wrqu));
1144 wrqu.data.length = info->resp_ie_len;
1145 wireless_send_event(wdev->netdev, IWEVASSOCRESPIE,
1146 &wrqu, info->resp_ie);
1147 }
1148
1149 memset(&wrqu, 0, sizeof(wrqu));
1150 wrqu.ap_addr.sa_family = ARPHRD_ETHER;
1151 memcpy(wrqu.ap_addr.sa_data, connected_addr, ETH_ALEN);
1152 memcpy(wdev->wext.prev_bssid, connected_addr, ETH_ALEN);
1153 wdev->wext.prev_bssid_valid = true;
1154 wireless_send_event(wdev->netdev, SIOCGIWAP, &wrqu, NULL);
1155 }
1156 #endif
1157
1158 return;
1159 out:
1160 for_each_valid_link(info, link)
1161 cfg80211_put_bss(wdev->wiphy, info->links[link].bss);
1162 }
1163
1164 /* Consumes info->links.bss object(s) one way or another */
1165 void cfg80211_roamed(struct net_device *dev, struct cfg80211_roam_info *info,
1166 gfp_t gfp)
1167 {
1168 struct wireless_dev *wdev = dev->ieee80211_ptr;
1169 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
1170 struct cfg80211_event *ev;
1171 unsigned long flags;
1172 u8 *next;
1173 unsigned int link;
1174 size_t link_info_size = 0;
1175 bool bss_not_found = false;
1176
1177 for_each_valid_link(info, link) {
1178 link_info_size += info->links[link].addr ? ETH_ALEN : 0;
1179 link_info_size += info->links[link].bssid ? ETH_ALEN : 0;
1180
1181 if (info->links[link].bss)
1182 continue;
1183
1184 info->links[link].bss =
1185 cfg80211_get_bss(wdev->wiphy,
1186 info->links[link].channel,
1187 info->links[link].bssid,
1188 wdev->u.client.ssid,
1189 wdev->u.client.ssid_len,
1190 wdev->conn_bss_type,
1191 IEEE80211_PRIVACY_ANY);
1192
1193 if (!info->links[link].bss) {
1194 bss_not_found = true;
1195 break;
1196 }
1197 }
1198
1199 if (WARN_ON(bss_not_found))
1200 goto out;
1201
1202 ev = kzalloc(sizeof(*ev) + info->req_ie_len + info->resp_ie_len +
1203 info->fils.kek_len + info->fils.pmk_len +
1204 (info->fils.pmkid ? WLAN_PMKID_LEN : 0) +
1205 (info->ap_mld_addr ? ETH_ALEN : 0) + link_info_size, gfp);
1206 if (!ev)
1207 goto out;
1208
1209 ev->type = EVENT_ROAMED;
1210 next = ((u8 *)ev) + sizeof(*ev);
1211 if (info->req_ie_len) {
1212 ev->rm.req_ie = next;
1213 ev->rm.req_ie_len = info->req_ie_len;
1214 memcpy((void *)ev->rm.req_ie, info->req_ie, info->req_ie_len);
1215 next += info->req_ie_len;
1216 }
1217 if (info->resp_ie_len) {
1218 ev->rm.resp_ie = next;
1219 ev->rm.resp_ie_len = info->resp_ie_len;
1220 memcpy((void *)ev->rm.resp_ie, info->resp_ie,
1221 info->resp_ie_len);
1222 next += info->resp_ie_len;
1223 }
1224 if (info->fils.kek_len) {
1225 ev->rm.fils.kek = next;
1226 ev->rm.fils.kek_len = info->fils.kek_len;
1227 memcpy((void *)ev->rm.fils.kek, info->fils.kek,
1228 info->fils.kek_len);
1229 next += info->fils.kek_len;
1230 }
1231 if (info->fils.pmk_len) {
1232 ev->rm.fils.pmk = next;
1233 ev->rm.fils.pmk_len = info->fils.pmk_len;
1234 memcpy((void *)ev->rm.fils.pmk, info->fils.pmk,
1235 info->fils.pmk_len);
1236 next += info->fils.pmk_len;
1237 }
1238 if (info->fils.pmkid) {
1239 ev->rm.fils.pmkid = next;
1240 memcpy((void *)ev->rm.fils.pmkid, info->fils.pmkid,
1241 WLAN_PMKID_LEN);
1242 next += WLAN_PMKID_LEN;
1243 }
1244 ev->rm.fils.update_erp_next_seq_num = info->fils.update_erp_next_seq_num;
1245 if (info->fils.update_erp_next_seq_num)
1246 ev->rm.fils.erp_next_seq_num = info->fils.erp_next_seq_num;
1247 if (info->ap_mld_addr) {
1248 ev->rm.ap_mld_addr = next;
1249 memcpy((void *)ev->rm.ap_mld_addr, info->ap_mld_addr,
1250 ETH_ALEN);
1251 next += ETH_ALEN;
1252 }
1253 ev->rm.valid_links = info->valid_links;
1254 for_each_valid_link(info, link) {
1255 ev->rm.links[link].bss = info->links[link].bss;
1256
1257 if (info->links[link].addr) {
1258 ev->rm.links[link].addr = next;
1259 memcpy((void *)ev->rm.links[link].addr,
1260 info->links[link].addr,
1261 ETH_ALEN);
1262 next += ETH_ALEN;
1263 }
1264
1265 if (info->links[link].bssid) {
1266 ev->rm.links[link].bssid = next;
1267 memcpy((void *)ev->rm.links[link].bssid,
1268 info->links[link].bssid,
1269 ETH_ALEN);
1270 next += ETH_ALEN;
1271 }
1272 }
1273
1274 spin_lock_irqsave(&wdev->event_lock, flags);
1275 list_add_tail(&ev->list, &wdev->event_list);
1276 spin_unlock_irqrestore(&wdev->event_lock, flags);
1277 queue_work(cfg80211_wq, &rdev->event_work);
1278
1279 return;
1280 out:
1281 for_each_valid_link(info, link)
1282 cfg80211_put_bss(wdev->wiphy, info->links[link].bss);
1283
1284 }
1285 EXPORT_SYMBOL(cfg80211_roamed);
1286
1287 void __cfg80211_port_authorized(struct wireless_dev *wdev, const u8 *peer_addr,
1288 const u8 *td_bitmap, u8 td_bitmap_len)
1289 {
1290 lockdep_assert_wiphy(wdev->wiphy);
1291
1292 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION &&
1293 wdev->iftype != NL80211_IFTYPE_P2P_CLIENT &&
1294 wdev->iftype != NL80211_IFTYPE_AP &&
1295 wdev->iftype != NL80211_IFTYPE_P2P_GO))
1296 return;
1297
1298 if (wdev->iftype == NL80211_IFTYPE_STATION ||
1299 wdev->iftype == NL80211_IFTYPE_P2P_CLIENT) {
1300 if (WARN_ON(!wdev->connected) ||
1301 WARN_ON(!ether_addr_equal(wdev->u.client.connected_addr, peer_addr)))
1302 return;
1303 }
1304
1305 nl80211_send_port_authorized(wiphy_to_rdev(wdev->wiphy), wdev->netdev,
1306 peer_addr, td_bitmap, td_bitmap_len);
1307 }
1308
1309 void cfg80211_port_authorized(struct net_device *dev, const u8 *peer_addr,
1310 const u8 *td_bitmap, u8 td_bitmap_len, gfp_t gfp)
1311 {
1312 struct wireless_dev *wdev = dev->ieee80211_ptr;
1313 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
1314 struct cfg80211_event *ev;
1315 unsigned long flags;
1316
1317 if (WARN_ON(!peer_addr))
1318 return;
1319
1320 ev = kzalloc(sizeof(*ev) + td_bitmap_len, gfp);
1321 if (!ev)
1322 return;
1323
1324 ev->type = EVENT_PORT_AUTHORIZED;
1325 memcpy(ev->pa.peer_addr, peer_addr, ETH_ALEN);
1326 ev->pa.td_bitmap = ((u8 *)ev) + sizeof(*ev);
1327 ev->pa.td_bitmap_len = td_bitmap_len;
1328 memcpy((void *)ev->pa.td_bitmap, td_bitmap, td_bitmap_len);
1329
1330 /*
1331 * Use the wdev event list so that if there are pending
1332 * connected/roamed events, they will be reported first.
1333 */
1334 spin_lock_irqsave(&wdev->event_lock, flags);
1335 list_add_tail(&ev->list, &wdev->event_list);
1336 spin_unlock_irqrestore(&wdev->event_lock, flags);
1337 queue_work(cfg80211_wq, &rdev->event_work);
1338 }
1339 EXPORT_SYMBOL(cfg80211_port_authorized);
1340
1341 void __cfg80211_disconnected(struct net_device *dev, const u8 *ie,
1342 size_t ie_len, u16 reason, bool from_ap)
1343 {
1344 struct wireless_dev *wdev = dev->ieee80211_ptr;
1345 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
1346 int i;
1347 #ifdef CONFIG_CFG80211_WEXT
1348 union iwreq_data wrqu;
1349 #endif
1350
1351 lockdep_assert_wiphy(wdev->wiphy);
1352
1353 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION &&
1354 wdev->iftype != NL80211_IFTYPE_P2P_CLIENT))
1355 return;
1356
1357 cfg80211_wdev_release_bsses(wdev);
1358 wdev->valid_links = 0;
1359 wdev->connected = false;
1360 wdev->u.client.ssid_len = 0;
1361 wdev->conn_owner_nlportid = 0;
1362 kfree_sensitive(wdev->connect_keys);
1363 wdev->connect_keys = NULL;
1364
1365 nl80211_send_disconnected(rdev, dev, reason, ie, ie_len, from_ap);
1366
1367 /* stop critical protocol if supported */
1368 if (rdev->ops->crit_proto_stop && rdev->crit_proto_nlportid) {
1369 rdev->crit_proto_nlportid = 0;
1370 rdev_crit_proto_stop(rdev, wdev);
1371 }
1372
1373 /*
1374 * Delete all the keys ... pairwise keys can't really
1375 * exist any more anyway, but default keys might.
1376 */
1377 if (rdev->ops->del_key) {
1378 int max_key_idx = 5;
1379
1380 if (wiphy_ext_feature_isset(
1381 wdev->wiphy,
1382 NL80211_EXT_FEATURE_BEACON_PROTECTION) ||
1383 wiphy_ext_feature_isset(
1384 wdev->wiphy,
1385 NL80211_EXT_FEATURE_BEACON_PROTECTION_CLIENT))
1386 max_key_idx = 7;
1387 for (i = 0; i <= max_key_idx; i++)
1388 rdev_del_key(rdev, dev, -1, i, false, NULL);
1389 }
1390
1391 rdev_set_qos_map(rdev, dev, NULL);
1392
1393 #ifdef CONFIG_CFG80211_WEXT
1394 memset(&wrqu, 0, sizeof(wrqu));
1395 wrqu.ap_addr.sa_family = ARPHRD_ETHER;
1396 wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL);
1397 wdev->wext.connect.ssid_len = 0;
1398 #endif
1399
1400 schedule_work(&cfg80211_disconnect_work);
1401
1402 cfg80211_schedule_channels_check(wdev);
1403 }
1404
1405 void cfg80211_disconnected(struct net_device *dev, u16 reason,
1406 const u8 *ie, size_t ie_len,
1407 bool locally_generated, gfp_t gfp)
1408 {
1409 struct wireless_dev *wdev = dev->ieee80211_ptr;
1410 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
1411 struct cfg80211_event *ev;
1412 unsigned long flags;
1413
1414 ev = kzalloc(sizeof(*ev) + ie_len, gfp);
1415 if (!ev)
1416 return;
1417
1418 ev->type = EVENT_DISCONNECTED;
1419 ev->dc.ie = ((u8 *)ev) + sizeof(*ev);
1420 ev->dc.ie_len = ie_len;
1421 memcpy((void *)ev->dc.ie, ie, ie_len);
1422 ev->dc.reason = reason;
1423 ev->dc.locally_generated = locally_generated;
1424
1425 spin_lock_irqsave(&wdev->event_lock, flags);
1426 list_add_tail(&ev->list, &wdev->event_list);
1427 spin_unlock_irqrestore(&wdev->event_lock, flags);
1428 queue_work(cfg80211_wq, &rdev->event_work);
1429 }
1430 EXPORT_SYMBOL(cfg80211_disconnected);
1431
1432 /*
1433 * API calls for nl80211/wext compatibility code
1434 */
1435 int cfg80211_connect(struct cfg80211_registered_device *rdev,
1436 struct net_device *dev,
1437 struct cfg80211_connect_params *connect,
1438 struct cfg80211_cached_keys *connkeys,
1439 const u8 *prev_bssid)
1440 {
1441 struct wireless_dev *wdev = dev->ieee80211_ptr;
1442 int err;
1443
1444 lockdep_assert_wiphy(wdev->wiphy);
1445
1446 /*
1447 * If we have an ssid_len, we're trying to connect or are
1448 * already connected, so reject a new SSID unless it's the
1449 * same (which is the case for re-association.)
1450 */
1451 if (wdev->u.client.ssid_len &&
1452 (wdev->u.client.ssid_len != connect->ssid_len ||
1453 memcmp(wdev->u.client.ssid, connect->ssid, wdev->u.client.ssid_len)))
1454 return -EALREADY;
1455
1456 /*
1457 * If connected, reject (re-)association unless prev_bssid
1458 * matches the current BSSID.
1459 */
1460 if (wdev->connected) {
1461 if (!prev_bssid)
1462 return -EALREADY;
1463 if (!ether_addr_equal(prev_bssid,
1464 wdev->u.client.connected_addr))
1465 return -ENOTCONN;
1466 }
1467
1468 /*
1469 * Reject if we're in the process of connecting with WEP,
1470 * this case isn't very interesting and trying to handle
1471 * it would make the code much more complex.
1472 */
1473 if (wdev->connect_keys)
1474 return -EINPROGRESS;
1475
1476 cfg80211_oper_and_ht_capa(&connect->ht_capa_mask,
1477 rdev->wiphy.ht_capa_mod_mask);
1478 cfg80211_oper_and_vht_capa(&connect->vht_capa_mask,
1479 rdev->wiphy.vht_capa_mod_mask);
1480
1481 if (connkeys && connkeys->def >= 0) {
1482 int idx;
1483 u32 cipher;
1484
1485 idx = connkeys->def;
1486 cipher = connkeys->params[idx].cipher;
1487 /* If given a WEP key we may need it for shared key auth */
1488 if (cipher == WLAN_CIPHER_SUITE_WEP40 ||
1489 cipher == WLAN_CIPHER_SUITE_WEP104) {
1490 connect->key_idx = idx;
1491 connect->key = connkeys->params[idx].key;
1492 connect->key_len = connkeys->params[idx].key_len;
1493
1494 /*
1495 * If ciphers are not set (e.g. when going through
1496 * iwconfig), we have to set them appropriately here.
1497 */
1498 if (connect->crypto.cipher_group == 0)
1499 connect->crypto.cipher_group = cipher;
1500
1501 if (connect->crypto.n_ciphers_pairwise == 0) {
1502 connect->crypto.n_ciphers_pairwise = 1;
1503 connect->crypto.ciphers_pairwise[0] = cipher;
1504 }
1505 }
1506 } else {
1507 if (WARN_ON(connkeys))
1508 return -EINVAL;
1509
1510 /* connect can point to wdev->wext.connect which
1511 * can hold key data from a previous connection
1512 */
1513 connect->key = NULL;
1514 connect->key_len = 0;
1515 connect->key_idx = 0;
1516 }
1517
1518 wdev->connect_keys = connkeys;
1519 memcpy(wdev->u.client.ssid, connect->ssid, connect->ssid_len);
1520 wdev->u.client.ssid_len = connect->ssid_len;
1521
1522 wdev->conn_bss_type = connect->pbss ? IEEE80211_BSS_TYPE_PBSS :
1523 IEEE80211_BSS_TYPE_ESS;
1524
1525 if (!rdev->ops->connect)
1526 err = cfg80211_sme_connect(wdev, connect, prev_bssid);
1527 else
1528 err = rdev_connect(rdev, dev, connect);
1529
1530 if (err) {
1531 wdev->connect_keys = NULL;
1532 /*
1533 * This could be reassoc getting refused, don't clear
1534 * ssid_len in that case.
1535 */
1536 if (!wdev->connected)
1537 wdev->u.client.ssid_len = 0;
1538 return err;
1539 }
1540
1541 return 0;
1542 }
1543
1544 int cfg80211_disconnect(struct cfg80211_registered_device *rdev,
1545 struct net_device *dev, u16 reason, bool wextev)
1546 {
1547 struct wireless_dev *wdev = dev->ieee80211_ptr;
1548 int err = 0;
1549
1550 lockdep_assert_wiphy(wdev->wiphy);
1551
1552 kfree_sensitive(wdev->connect_keys);
1553 wdev->connect_keys = NULL;
1554
1555 wdev->conn_owner_nlportid = 0;
1556
1557 if (wdev->conn)
1558 err = cfg80211_sme_disconnect(wdev, reason);
1559 else if (!rdev->ops->disconnect)
1560 cfg80211_mlme_down(rdev, dev);
1561 else if (wdev->u.client.ssid_len)
1562 err = rdev_disconnect(rdev, dev, reason);
1563
1564 /*
1565 * Clear ssid_len unless we actually were fully connected,
1566 * in which case cfg80211_disconnected() will take care of
1567 * this later.
1568 */
1569 if (!wdev->connected)
1570 wdev->u.client.ssid_len = 0;
1571
1572 return err;
1573 }
1574
1575 /*
1576 * Used to clean up after the connection / connection attempt owner socket
1577 * disconnects
1578 */
1579 void cfg80211_autodisconnect_wk(struct work_struct *work)
1580 {
1581 struct wireless_dev *wdev =
1582 container_of(work, struct wireless_dev, disconnect_wk);
1583 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
1584
1585 wiphy_lock(wdev->wiphy);
1586
1587 if (wdev->conn_owner_nlportid) {
1588 switch (wdev->iftype) {
1589 case NL80211_IFTYPE_ADHOC:
1590 cfg80211_leave_ibss(rdev, wdev->netdev, false);
1591 break;
1592 case NL80211_IFTYPE_AP:
1593 case NL80211_IFTYPE_P2P_GO:
1594 cfg80211_stop_ap(rdev, wdev->netdev, -1, false);
1595 break;
1596 case NL80211_IFTYPE_MESH_POINT:
1597 cfg80211_leave_mesh(rdev, wdev->netdev);
1598 break;
1599 case NL80211_IFTYPE_STATION:
1600 case NL80211_IFTYPE_P2P_CLIENT:
1601 /*
1602 * Use disconnect_bssid if still connecting and
1603 * ops->disconnect not implemented. Otherwise we can
1604 * use cfg80211_disconnect.
1605 */
1606 if (rdev->ops->disconnect || wdev->connected)
1607 cfg80211_disconnect(rdev, wdev->netdev,
1608 WLAN_REASON_DEAUTH_LEAVING,
1609 true);
1610 else
1611 cfg80211_mlme_deauth(rdev, wdev->netdev,
1612 wdev->disconnect_bssid,
1613 NULL, 0,
1614 WLAN_REASON_DEAUTH_LEAVING,
1615 false);
1616 break;
1617 default:
1618 break;
1619 }
1620 }
1621
1622 wiphy_unlock(wdev->wiphy);
1623 }
Kernel DRM miscellaneous fixes and cross-tree changes