Merge tag 'clk-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/clk/linux
[linux-2.6-microblaze.git] / net / wireless / sme.c
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 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         ASSERT_WDEV_LOCK(wdev);
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->channels[n_channels];
119         request->n_ssids = 1;
120
121         memcpy(request->ssids[0].ssid, wdev->conn->params.ssid,
122                 wdev->conn->params.ssid_len);
123         request->ssids[0].ssid_len = wdev->conn->params.ssid_len;
124
125         eth_broadcast_addr(request->bssid);
126
127         request->wdev = wdev;
128         request->wiphy = &rdev->wiphy;
129         request->scan_start = jiffies;
130
131         rdev->scan_req = request;
132
133         err = rdev_scan(rdev, request);
134         if (!err) {
135                 wdev->conn->state = CFG80211_CONN_SCANNING;
136                 nl80211_send_scan_start(rdev, wdev);
137                 dev_hold(wdev->netdev);
138         } else {
139                 rdev->scan_req = NULL;
140                 kfree(request);
141         }
142         return err;
143 }
144
145 static int cfg80211_conn_do_work(struct wireless_dev *wdev,
146                                  enum nl80211_timeout_reason *treason)
147 {
148         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
149         struct cfg80211_connect_params *params;
150         struct cfg80211_assoc_request req = {};
151         int err;
152
153         ASSERT_WDEV_LOCK(wdev);
154
155         if (!wdev->conn)
156                 return 0;
157
158         params = &wdev->conn->params;
159
160         switch (wdev->conn->state) {
161         case CFG80211_CONN_SCANNING:
162                 /* didn't find it during scan ... */
163                 return -ENOENT;
164         case CFG80211_CONN_SCAN_AGAIN:
165                 return cfg80211_conn_scan(wdev);
166         case CFG80211_CONN_AUTHENTICATE_NEXT:
167                 if (WARN_ON(!rdev->ops->auth))
168                         return -EOPNOTSUPP;
169                 wdev->conn->state = CFG80211_CONN_AUTHENTICATING;
170                 return cfg80211_mlme_auth(rdev, wdev->netdev,
171                                           params->channel, params->auth_type,
172                                           params->bssid,
173                                           params->ssid, params->ssid_len,
174                                           NULL, 0,
175                                           params->key, params->key_len,
176                                           params->key_idx, NULL, 0);
177         case CFG80211_CONN_AUTH_FAILED_TIMEOUT:
178                 *treason = NL80211_TIMEOUT_AUTH;
179                 return -ENOTCONN;
180         case CFG80211_CONN_ASSOCIATE_NEXT:
181                 if (WARN_ON(!rdev->ops->assoc))
182                         return -EOPNOTSUPP;
183                 wdev->conn->state = CFG80211_CONN_ASSOCIATING;
184                 if (wdev->conn->prev_bssid_valid)
185                         req.prev_bssid = wdev->conn->prev_bssid;
186                 req.ie = params->ie;
187                 req.ie_len = params->ie_len;
188                 req.use_mfp = params->mfp != NL80211_MFP_NO;
189                 req.crypto = params->crypto;
190                 req.flags = params->flags;
191                 req.ht_capa = params->ht_capa;
192                 req.ht_capa_mask = params->ht_capa_mask;
193                 req.vht_capa = params->vht_capa;
194                 req.vht_capa_mask = params->vht_capa_mask;
195
196                 err = cfg80211_mlme_assoc(rdev, wdev->netdev, params->channel,
197                                           params->bssid, params->ssid,
198                                           params->ssid_len, &req);
199                 if (err)
200                         cfg80211_mlme_deauth(rdev, wdev->netdev, params->bssid,
201                                              NULL, 0,
202                                              WLAN_REASON_DEAUTH_LEAVING,
203                                              false);
204                 return err;
205         case CFG80211_CONN_ASSOC_FAILED_TIMEOUT:
206                 *treason = NL80211_TIMEOUT_ASSOC;
207                 fallthrough;
208         case CFG80211_CONN_ASSOC_FAILED:
209                 cfg80211_mlme_deauth(rdev, wdev->netdev, params->bssid,
210                                      NULL, 0,
211                                      WLAN_REASON_DEAUTH_LEAVING, false);
212                 return -ENOTCONN;
213         case CFG80211_CONN_DEAUTH:
214                 cfg80211_mlme_deauth(rdev, wdev->netdev, params->bssid,
215                                      NULL, 0,
216                                      WLAN_REASON_DEAUTH_LEAVING, false);
217                 fallthrough;
218         case CFG80211_CONN_ABANDON:
219                 /* free directly, disconnected event already sent */
220                 cfg80211_sme_free(wdev);
221                 return 0;
222         default:
223                 return 0;
224         }
225 }
226
227 void cfg80211_conn_work(struct work_struct *work)
228 {
229         struct cfg80211_registered_device *rdev =
230                 container_of(work, struct cfg80211_registered_device, conn_work);
231         struct wireless_dev *wdev;
232         u8 bssid_buf[ETH_ALEN], *bssid = NULL;
233         enum nl80211_timeout_reason treason;
234
235         wiphy_lock(&rdev->wiphy);
236
237         list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) {
238                 if (!wdev->netdev)
239                         continue;
240
241                 wdev_lock(wdev);
242                 if (!netif_running(wdev->netdev)) {
243                         wdev_unlock(wdev);
244                         continue;
245                 }
246                 if (!wdev->conn ||
247                     wdev->conn->state == CFG80211_CONN_CONNECTED) {
248                         wdev_unlock(wdev);
249                         continue;
250                 }
251                 if (wdev->conn->params.bssid) {
252                         memcpy(bssid_buf, wdev->conn->params.bssid, ETH_ALEN);
253                         bssid = bssid_buf;
254                 }
255                 treason = NL80211_TIMEOUT_UNSPECIFIED;
256                 if (cfg80211_conn_do_work(wdev, &treason)) {
257                         struct cfg80211_connect_resp_params cr;
258
259                         memset(&cr, 0, sizeof(cr));
260                         cr.status = -1;
261                         cr.bssid = bssid;
262                         cr.timeout_reason = treason;
263                         __cfg80211_connect_result(wdev->netdev, &cr, false);
264                 }
265                 wdev_unlock(wdev);
266         }
267
268         wiphy_unlock(&rdev->wiphy);
269 }
270
271 /* Returned bss is reference counted and must be cleaned up appropriately. */
272 static struct cfg80211_bss *cfg80211_get_conn_bss(struct wireless_dev *wdev)
273 {
274         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
275         struct cfg80211_bss *bss;
276
277         ASSERT_WDEV_LOCK(wdev);
278
279         bss = cfg80211_get_bss(wdev->wiphy, wdev->conn->params.channel,
280                                wdev->conn->params.bssid,
281                                wdev->conn->params.ssid,
282                                wdev->conn->params.ssid_len,
283                                wdev->conn_bss_type,
284                                IEEE80211_PRIVACY(wdev->conn->params.privacy));
285         if (!bss)
286                 return NULL;
287
288         memcpy(wdev->conn->bssid, bss->bssid, ETH_ALEN);
289         wdev->conn->params.bssid = wdev->conn->bssid;
290         wdev->conn->params.channel = bss->channel;
291         wdev->conn->state = CFG80211_CONN_AUTHENTICATE_NEXT;
292         schedule_work(&rdev->conn_work);
293
294         return bss;
295 }
296
297 static void __cfg80211_sme_scan_done(struct net_device *dev)
298 {
299         struct wireless_dev *wdev = dev->ieee80211_ptr;
300         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
301         struct cfg80211_bss *bss;
302
303         ASSERT_WDEV_LOCK(wdev);
304
305         if (!wdev->conn)
306                 return;
307
308         if (wdev->conn->state != CFG80211_CONN_SCANNING &&
309             wdev->conn->state != CFG80211_CONN_SCAN_AGAIN)
310                 return;
311
312         bss = cfg80211_get_conn_bss(wdev);
313         if (bss)
314                 cfg80211_put_bss(&rdev->wiphy, bss);
315         else
316                 schedule_work(&rdev->conn_work);
317 }
318
319 void cfg80211_sme_scan_done(struct net_device *dev)
320 {
321         struct wireless_dev *wdev = dev->ieee80211_ptr;
322
323         wdev_lock(wdev);
324         __cfg80211_sme_scan_done(dev);
325         wdev_unlock(wdev);
326 }
327
328 void cfg80211_sme_rx_auth(struct wireless_dev *wdev, const u8 *buf, size_t len)
329 {
330         struct wiphy *wiphy = wdev->wiphy;
331         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
332         struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)buf;
333         u16 status_code = le16_to_cpu(mgmt->u.auth.status_code);
334
335         ASSERT_WDEV_LOCK(wdev);
336
337         if (!wdev->conn || wdev->conn->state == CFG80211_CONN_CONNECTED)
338                 return;
339
340         if (status_code == WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG &&
341             wdev->conn->auto_auth &&
342             wdev->conn->params.auth_type != NL80211_AUTHTYPE_NETWORK_EAP) {
343                 /* select automatically between only open, shared, leap */
344                 switch (wdev->conn->params.auth_type) {
345                 case NL80211_AUTHTYPE_OPEN_SYSTEM:
346                         if (wdev->connect_keys)
347                                 wdev->conn->params.auth_type =
348                                         NL80211_AUTHTYPE_SHARED_KEY;
349                         else
350                                 wdev->conn->params.auth_type =
351                                         NL80211_AUTHTYPE_NETWORK_EAP;
352                         break;
353                 case NL80211_AUTHTYPE_SHARED_KEY:
354                         wdev->conn->params.auth_type =
355                                 NL80211_AUTHTYPE_NETWORK_EAP;
356                         break;
357                 default:
358                         /* huh? */
359                         wdev->conn->params.auth_type =
360                                 NL80211_AUTHTYPE_OPEN_SYSTEM;
361                         break;
362                 }
363                 wdev->conn->state = CFG80211_CONN_AUTHENTICATE_NEXT;
364                 schedule_work(&rdev->conn_work);
365         } else if (status_code != WLAN_STATUS_SUCCESS) {
366                 struct cfg80211_connect_resp_params cr;
367
368                 memset(&cr, 0, sizeof(cr));
369                 cr.status = status_code;
370                 cr.bssid = mgmt->bssid;
371                 cr.timeout_reason = NL80211_TIMEOUT_UNSPECIFIED;
372                 __cfg80211_connect_result(wdev->netdev, &cr, false);
373         } else if (wdev->conn->state == CFG80211_CONN_AUTHENTICATING) {
374                 wdev->conn->state = CFG80211_CONN_ASSOCIATE_NEXT;
375                 schedule_work(&rdev->conn_work);
376         }
377 }
378
379 bool cfg80211_sme_rx_assoc_resp(struct wireless_dev *wdev, u16 status)
380 {
381         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
382
383         if (!wdev->conn)
384                 return false;
385
386         if (status == WLAN_STATUS_SUCCESS) {
387                 wdev->conn->state = CFG80211_CONN_CONNECTED;
388                 return false;
389         }
390
391         if (wdev->conn->prev_bssid_valid) {
392                 /*
393                  * Some stupid APs don't accept reassoc, so we
394                  * need to fall back to trying regular assoc;
395                  * return true so no event is sent to userspace.
396                  */
397                 wdev->conn->prev_bssid_valid = false;
398                 wdev->conn->state = CFG80211_CONN_ASSOCIATE_NEXT;
399                 schedule_work(&rdev->conn_work);
400                 return true;
401         }
402
403         wdev->conn->state = CFG80211_CONN_ASSOC_FAILED;
404         schedule_work(&rdev->conn_work);
405         return false;
406 }
407
408 void cfg80211_sme_deauth(struct wireless_dev *wdev)
409 {
410         cfg80211_sme_free(wdev);
411 }
412
413 void cfg80211_sme_auth_timeout(struct wireless_dev *wdev)
414 {
415         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
416
417         if (!wdev->conn)
418                 return;
419
420         wdev->conn->state = CFG80211_CONN_AUTH_FAILED_TIMEOUT;
421         schedule_work(&rdev->conn_work);
422 }
423
424 void cfg80211_sme_disassoc(struct wireless_dev *wdev)
425 {
426         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
427
428         if (!wdev->conn)
429                 return;
430
431         wdev->conn->state = CFG80211_CONN_DEAUTH;
432         schedule_work(&rdev->conn_work);
433 }
434
435 void cfg80211_sme_assoc_timeout(struct wireless_dev *wdev)
436 {
437         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
438
439         if (!wdev->conn)
440                 return;
441
442         wdev->conn->state = CFG80211_CONN_ASSOC_FAILED_TIMEOUT;
443         schedule_work(&rdev->conn_work);
444 }
445
446 void cfg80211_sme_abandon_assoc(struct wireless_dev *wdev)
447 {
448         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
449
450         if (!wdev->conn)
451                 return;
452
453         wdev->conn->state = CFG80211_CONN_ABANDON;
454         schedule_work(&rdev->conn_work);
455 }
456
457 static int cfg80211_sme_get_conn_ies(struct wireless_dev *wdev,
458                                      const u8 *ies, size_t ies_len,
459                                      const u8 **out_ies, size_t *out_ies_len)
460 {
461         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
462         u8 *buf;
463         size_t offs;
464
465         if (!rdev->wiphy.extended_capabilities_len ||
466             (ies && cfg80211_find_ie(WLAN_EID_EXT_CAPABILITY, ies, ies_len))) {
467                 *out_ies = kmemdup(ies, ies_len, GFP_KERNEL);
468                 if (!*out_ies)
469                         return -ENOMEM;
470                 *out_ies_len = ies_len;
471                 return 0;
472         }
473
474         buf = kmalloc(ies_len + rdev->wiphy.extended_capabilities_len + 2,
475                       GFP_KERNEL);
476         if (!buf)
477                 return -ENOMEM;
478
479         if (ies_len) {
480                 static const u8 before_extcapa[] = {
481                         /* not listing IEs expected to be created by driver */
482                         WLAN_EID_RSN,
483                         WLAN_EID_QOS_CAPA,
484                         WLAN_EID_RRM_ENABLED_CAPABILITIES,
485                         WLAN_EID_MOBILITY_DOMAIN,
486                         WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
487                         WLAN_EID_BSS_COEX_2040,
488                 };
489
490                 offs = ieee80211_ie_split(ies, ies_len, before_extcapa,
491                                           ARRAY_SIZE(before_extcapa), 0);
492                 memcpy(buf, ies, offs);
493                 /* leave a whole for extended capabilities IE */
494                 memcpy(buf + offs + rdev->wiphy.extended_capabilities_len + 2,
495                        ies + offs, ies_len - offs);
496         } else {
497                 offs = 0;
498         }
499
500         /* place extended capabilities IE (with only driver capabilities) */
501         buf[offs] = WLAN_EID_EXT_CAPABILITY;
502         buf[offs + 1] = rdev->wiphy.extended_capabilities_len;
503         memcpy(buf + offs + 2,
504                rdev->wiphy.extended_capabilities,
505                rdev->wiphy.extended_capabilities_len);
506
507         *out_ies = buf;
508         *out_ies_len = ies_len + rdev->wiphy.extended_capabilities_len + 2;
509
510         return 0;
511 }
512
513 static int cfg80211_sme_connect(struct wireless_dev *wdev,
514                                 struct cfg80211_connect_params *connect,
515                                 const u8 *prev_bssid)
516 {
517         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
518         struct cfg80211_bss *bss;
519         int err;
520
521         if (!rdev->ops->auth || !rdev->ops->assoc)
522                 return -EOPNOTSUPP;
523
524         if (wdev->current_bss) {
525                 cfg80211_unhold_bss(wdev->current_bss);
526                 cfg80211_put_bss(wdev->wiphy, &wdev->current_bss->pub);
527                 wdev->current_bss = NULL;
528
529                 cfg80211_sme_free(wdev);
530         }
531
532         if (wdev->conn)
533                 return -EINPROGRESS;
534
535         wdev->conn = kzalloc(sizeof(*wdev->conn), GFP_KERNEL);
536         if (!wdev->conn)
537                 return -ENOMEM;
538
539         /*
540          * Copy all parameters, and treat explicitly IEs, BSSID, SSID.
541          */
542         memcpy(&wdev->conn->params, connect, sizeof(*connect));
543         if (connect->bssid) {
544                 wdev->conn->params.bssid = wdev->conn->bssid;
545                 memcpy(wdev->conn->bssid, connect->bssid, ETH_ALEN);
546         }
547
548         if (cfg80211_sme_get_conn_ies(wdev, connect->ie, connect->ie_len,
549                                       &wdev->conn->ie,
550                                       &wdev->conn->params.ie_len)) {
551                 kfree(wdev->conn);
552                 wdev->conn = NULL;
553                 return -ENOMEM;
554         }
555         wdev->conn->params.ie = wdev->conn->ie;
556
557         if (connect->auth_type == NL80211_AUTHTYPE_AUTOMATIC) {
558                 wdev->conn->auto_auth = true;
559                 /* start with open system ... should mostly work */
560                 wdev->conn->params.auth_type =
561                         NL80211_AUTHTYPE_OPEN_SYSTEM;
562         } else {
563                 wdev->conn->auto_auth = false;
564         }
565
566         wdev->conn->params.ssid = wdev->ssid;
567         wdev->conn->params.ssid_len = wdev->ssid_len;
568
569         /* see if we have the bss already */
570         bss = cfg80211_get_conn_bss(wdev);
571
572         if (prev_bssid) {
573                 memcpy(wdev->conn->prev_bssid, prev_bssid, ETH_ALEN);
574                 wdev->conn->prev_bssid_valid = true;
575         }
576
577         /* we're good if we have a matching bss struct */
578         if (bss) {
579                 enum nl80211_timeout_reason treason;
580
581                 err = cfg80211_conn_do_work(wdev, &treason);
582                 cfg80211_put_bss(wdev->wiphy, bss);
583         } else {
584                 /* otherwise we'll need to scan for the AP first */
585                 err = cfg80211_conn_scan(wdev);
586
587                 /*
588                  * If we can't scan right now, then we need to scan again
589                  * after the current scan finished, since the parameters
590                  * changed (unless we find a good AP anyway).
591                  */
592                 if (err == -EBUSY) {
593                         err = 0;
594                         wdev->conn->state = CFG80211_CONN_SCAN_AGAIN;
595                 }
596         }
597
598         if (err)
599                 cfg80211_sme_free(wdev);
600
601         return err;
602 }
603
604 static int cfg80211_sme_disconnect(struct wireless_dev *wdev, u16 reason)
605 {
606         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
607         int err;
608
609         if (!wdev->conn)
610                 return 0;
611
612         if (!rdev->ops->deauth)
613                 return -EOPNOTSUPP;
614
615         if (wdev->conn->state == CFG80211_CONN_SCANNING ||
616             wdev->conn->state == CFG80211_CONN_SCAN_AGAIN) {
617                 err = 0;
618                 goto out;
619         }
620
621         /* wdev->conn->params.bssid must be set if > SCANNING */
622         err = cfg80211_mlme_deauth(rdev, wdev->netdev,
623                                    wdev->conn->params.bssid,
624                                    NULL, 0, reason, false);
625  out:
626         cfg80211_sme_free(wdev);
627         return err;
628 }
629
630 /*
631  * code shared for in-device and software SME
632  */
633
634 static bool cfg80211_is_all_idle(void)
635 {
636         struct cfg80211_registered_device *rdev;
637         struct wireless_dev *wdev;
638         bool is_all_idle = true;
639
640         /*
641          * All devices must be idle as otherwise if you are actively
642          * scanning some new beacon hints could be learned and would
643          * count as new regulatory hints.
644          * Also if there is any other active beaconing interface we
645          * need not issue a disconnect hint and reset any info such
646          * as chan dfs state, etc.
647          */
648         list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
649                 list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) {
650                         wdev_lock(wdev);
651                         if (wdev->conn || wdev->current_bss ||
652                             cfg80211_beaconing_iface_active(wdev))
653                                 is_all_idle = false;
654                         wdev_unlock(wdev);
655                 }
656         }
657
658         return is_all_idle;
659 }
660
661 static void disconnect_work(struct work_struct *work)
662 {
663         rtnl_lock();
664         if (cfg80211_is_all_idle())
665                 regulatory_hint_disconnect();
666         rtnl_unlock();
667 }
668
669 DECLARE_WORK(cfg80211_disconnect_work, disconnect_work);
670
671
672 /*
673  * API calls for drivers implementing connect/disconnect and
674  * SME event handling
675  */
676
677 /* This method must consume bss one way or another */
678 void __cfg80211_connect_result(struct net_device *dev,
679                                struct cfg80211_connect_resp_params *cr,
680                                bool wextev)
681 {
682         struct wireless_dev *wdev = dev->ieee80211_ptr;
683         const u8 *country_ie;
684 #ifdef CONFIG_CFG80211_WEXT
685         union iwreq_data wrqu;
686 #endif
687
688         ASSERT_WDEV_LOCK(wdev);
689
690         if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION &&
691                     wdev->iftype != NL80211_IFTYPE_P2P_CLIENT)) {
692                 cfg80211_put_bss(wdev->wiphy, cr->bss);
693                 return;
694         }
695
696         wdev->unprot_beacon_reported = 0;
697         nl80211_send_connect_result(wiphy_to_rdev(wdev->wiphy), dev, cr,
698                                     GFP_KERNEL);
699
700 #ifdef CONFIG_CFG80211_WEXT
701         if (wextev) {
702                 if (cr->req_ie && cr->status == WLAN_STATUS_SUCCESS) {
703                         memset(&wrqu, 0, sizeof(wrqu));
704                         wrqu.data.length = cr->req_ie_len;
705                         wireless_send_event(dev, IWEVASSOCREQIE, &wrqu,
706                                             cr->req_ie);
707                 }
708
709                 if (cr->resp_ie && cr->status == WLAN_STATUS_SUCCESS) {
710                         memset(&wrqu, 0, sizeof(wrqu));
711                         wrqu.data.length = cr->resp_ie_len;
712                         wireless_send_event(dev, IWEVASSOCRESPIE, &wrqu,
713                                             cr->resp_ie);
714                 }
715
716                 memset(&wrqu, 0, sizeof(wrqu));
717                 wrqu.ap_addr.sa_family = ARPHRD_ETHER;
718                 if (cr->bssid && cr->status == WLAN_STATUS_SUCCESS) {
719                         memcpy(wrqu.ap_addr.sa_data, cr->bssid, ETH_ALEN);
720                         memcpy(wdev->wext.prev_bssid, cr->bssid, ETH_ALEN);
721                         wdev->wext.prev_bssid_valid = true;
722                 }
723                 wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL);
724         }
725 #endif
726
727         if (!cr->bss && (cr->status == WLAN_STATUS_SUCCESS)) {
728                 WARN_ON_ONCE(!wiphy_to_rdev(wdev->wiphy)->ops->connect);
729                 cr->bss = cfg80211_get_bss(wdev->wiphy, NULL, cr->bssid,
730                                            wdev->ssid, wdev->ssid_len,
731                                            wdev->conn_bss_type,
732                                            IEEE80211_PRIVACY_ANY);
733                 if (cr->bss)
734                         cfg80211_hold_bss(bss_from_pub(cr->bss));
735         }
736
737         if (wdev->current_bss) {
738                 cfg80211_unhold_bss(wdev->current_bss);
739                 cfg80211_put_bss(wdev->wiphy, &wdev->current_bss->pub);
740                 wdev->current_bss = NULL;
741         }
742
743         if (cr->status != WLAN_STATUS_SUCCESS) {
744                 kfree_sensitive(wdev->connect_keys);
745                 wdev->connect_keys = NULL;
746                 wdev->ssid_len = 0;
747                 wdev->conn_owner_nlportid = 0;
748                 if (cr->bss) {
749                         cfg80211_unhold_bss(bss_from_pub(cr->bss));
750                         cfg80211_put_bss(wdev->wiphy, cr->bss);
751                 }
752                 cfg80211_sme_free(wdev);
753                 return;
754         }
755
756         if (WARN_ON(!cr->bss))
757                 return;
758
759         wdev->current_bss = bss_from_pub(cr->bss);
760
761         if (!(wdev->wiphy->flags & WIPHY_FLAG_HAS_STATIC_WEP))
762                 cfg80211_upload_connect_keys(wdev);
763
764         rcu_read_lock();
765         country_ie = ieee80211_bss_get_ie(cr->bss, WLAN_EID_COUNTRY);
766         if (!country_ie) {
767                 rcu_read_unlock();
768                 return;
769         }
770
771         country_ie = kmemdup(country_ie, 2 + country_ie[1], GFP_ATOMIC);
772         rcu_read_unlock();
773
774         if (!country_ie)
775                 return;
776
777         /*
778          * ieee80211_bss_get_ie() ensures we can access:
779          * - country_ie + 2, the start of the country ie data, and
780          * - and country_ie[1] which is the IE length
781          */
782         regulatory_hint_country_ie(wdev->wiphy, cr->bss->channel->band,
783                                    country_ie + 2, country_ie[1]);
784         kfree(country_ie);
785 }
786
787 /* Consumes bss object one way or another */
788 void cfg80211_connect_done(struct net_device *dev,
789                            struct cfg80211_connect_resp_params *params,
790                            gfp_t gfp)
791 {
792         struct wireless_dev *wdev = dev->ieee80211_ptr;
793         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
794         struct cfg80211_event *ev;
795         unsigned long flags;
796         u8 *next;
797
798         if (params->bss) {
799                 struct cfg80211_internal_bss *ibss = bss_from_pub(params->bss);
800
801                 if (list_empty(&ibss->list)) {
802                         struct cfg80211_bss *found = NULL, *tmp = params->bss;
803
804                         found = cfg80211_get_bss(wdev->wiphy, NULL,
805                                                  params->bss->bssid,
806                                                  wdev->ssid, wdev->ssid_len,
807                                                  wdev->conn_bss_type,
808                                                  IEEE80211_PRIVACY_ANY);
809                         if (found) {
810                                 /* The same BSS is already updated so use it
811                                  * instead, as it has latest info.
812                                  */
813                                 params->bss = found;
814                         } else {
815                                 /* Update with BSS provided by driver, it will
816                                  * be freshly added and ref cnted, we can free
817                                  * the old one.
818                                  *
819                                  * signal_valid can be false, as we are not
820                                  * expecting the BSS to be found.
821                                  *
822                                  * keep the old timestamp to avoid confusion
823                                  */
824                                 cfg80211_bss_update(rdev, ibss, false,
825                                                     ibss->ts);
826                         }
827
828                         cfg80211_put_bss(wdev->wiphy, tmp);
829                 }
830         }
831
832         ev = kzalloc(sizeof(*ev) + (params->bssid ? ETH_ALEN : 0) +
833                      params->req_ie_len + params->resp_ie_len +
834                      params->fils.kek_len + params->fils.pmk_len +
835                      (params->fils.pmkid ? WLAN_PMKID_LEN : 0), gfp);
836         if (!ev) {
837                 cfg80211_put_bss(wdev->wiphy, params->bss);
838                 return;
839         }
840
841         ev->type = EVENT_CONNECT_RESULT;
842         next = ((u8 *)ev) + sizeof(*ev);
843         if (params->bssid) {
844                 ev->cr.bssid = next;
845                 memcpy((void *)ev->cr.bssid, params->bssid, ETH_ALEN);
846                 next += ETH_ALEN;
847         }
848         if (params->req_ie_len) {
849                 ev->cr.req_ie = next;
850                 ev->cr.req_ie_len = params->req_ie_len;
851                 memcpy((void *)ev->cr.req_ie, params->req_ie,
852                        params->req_ie_len);
853                 next += params->req_ie_len;
854         }
855         if (params->resp_ie_len) {
856                 ev->cr.resp_ie = next;
857                 ev->cr.resp_ie_len = params->resp_ie_len;
858                 memcpy((void *)ev->cr.resp_ie, params->resp_ie,
859                        params->resp_ie_len);
860                 next += params->resp_ie_len;
861         }
862         if (params->fils.kek_len) {
863                 ev->cr.fils.kek = next;
864                 ev->cr.fils.kek_len = params->fils.kek_len;
865                 memcpy((void *)ev->cr.fils.kek, params->fils.kek,
866                        params->fils.kek_len);
867                 next += params->fils.kek_len;
868         }
869         if (params->fils.pmk_len) {
870                 ev->cr.fils.pmk = next;
871                 ev->cr.fils.pmk_len = params->fils.pmk_len;
872                 memcpy((void *)ev->cr.fils.pmk, params->fils.pmk,
873                        params->fils.pmk_len);
874                 next += params->fils.pmk_len;
875         }
876         if (params->fils.pmkid) {
877                 ev->cr.fils.pmkid = next;
878                 memcpy((void *)ev->cr.fils.pmkid, params->fils.pmkid,
879                        WLAN_PMKID_LEN);
880                 next += WLAN_PMKID_LEN;
881         }
882         ev->cr.fils.update_erp_next_seq_num = params->fils.update_erp_next_seq_num;
883         if (params->fils.update_erp_next_seq_num)
884                 ev->cr.fils.erp_next_seq_num = params->fils.erp_next_seq_num;
885         if (params->bss)
886                 cfg80211_hold_bss(bss_from_pub(params->bss));
887         ev->cr.bss = params->bss;
888         ev->cr.status = params->status;
889         ev->cr.timeout_reason = params->timeout_reason;
890
891         spin_lock_irqsave(&wdev->event_lock, flags);
892         list_add_tail(&ev->list, &wdev->event_list);
893         spin_unlock_irqrestore(&wdev->event_lock, flags);
894         queue_work(cfg80211_wq, &rdev->event_work);
895 }
896 EXPORT_SYMBOL(cfg80211_connect_done);
897
898 /* Consumes bss object one way or another */
899 void __cfg80211_roamed(struct wireless_dev *wdev,
900                        struct cfg80211_roam_info *info)
901 {
902 #ifdef CONFIG_CFG80211_WEXT
903         union iwreq_data wrqu;
904 #endif
905         ASSERT_WDEV_LOCK(wdev);
906
907         if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION &&
908                     wdev->iftype != NL80211_IFTYPE_P2P_CLIENT))
909                 goto out;
910
911         if (WARN_ON(!wdev->current_bss))
912                 goto out;
913
914         cfg80211_unhold_bss(wdev->current_bss);
915         cfg80211_put_bss(wdev->wiphy, &wdev->current_bss->pub);
916         wdev->current_bss = NULL;
917
918         if (WARN_ON(!info->bss))
919                 return;
920
921         cfg80211_hold_bss(bss_from_pub(info->bss));
922         wdev->current_bss = bss_from_pub(info->bss);
923
924         wdev->unprot_beacon_reported = 0;
925         nl80211_send_roamed(wiphy_to_rdev(wdev->wiphy),
926                             wdev->netdev, info, GFP_KERNEL);
927
928 #ifdef CONFIG_CFG80211_WEXT
929         if (info->req_ie) {
930                 memset(&wrqu, 0, sizeof(wrqu));
931                 wrqu.data.length = info->req_ie_len;
932                 wireless_send_event(wdev->netdev, IWEVASSOCREQIE,
933                                     &wrqu, info->req_ie);
934         }
935
936         if (info->resp_ie) {
937                 memset(&wrqu, 0, sizeof(wrqu));
938                 wrqu.data.length = info->resp_ie_len;
939                 wireless_send_event(wdev->netdev, IWEVASSOCRESPIE,
940                                     &wrqu, info->resp_ie);
941         }
942
943         memset(&wrqu, 0, sizeof(wrqu));
944         wrqu.ap_addr.sa_family = ARPHRD_ETHER;
945         memcpy(wrqu.ap_addr.sa_data, info->bss->bssid, ETH_ALEN);
946         memcpy(wdev->wext.prev_bssid, info->bss->bssid, ETH_ALEN);
947         wdev->wext.prev_bssid_valid = true;
948         wireless_send_event(wdev->netdev, SIOCGIWAP, &wrqu, NULL);
949 #endif
950
951         return;
952 out:
953         cfg80211_put_bss(wdev->wiphy, info->bss);
954 }
955
956 /* Consumes info->bss object one way or another */
957 void cfg80211_roamed(struct net_device *dev, struct cfg80211_roam_info *info,
958                      gfp_t gfp)
959 {
960         struct wireless_dev *wdev = dev->ieee80211_ptr;
961         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
962         struct cfg80211_event *ev;
963         unsigned long flags;
964         u8 *next;
965
966         if (!info->bss) {
967                 info->bss = cfg80211_get_bss(wdev->wiphy, info->channel,
968                                              info->bssid, wdev->ssid,
969                                              wdev->ssid_len,
970                                              wdev->conn_bss_type,
971                                              IEEE80211_PRIVACY_ANY);
972         }
973
974         if (WARN_ON(!info->bss))
975                 return;
976
977         ev = kzalloc(sizeof(*ev) + info->req_ie_len + info->resp_ie_len +
978                      info->fils.kek_len + info->fils.pmk_len +
979                      (info->fils.pmkid ? WLAN_PMKID_LEN : 0), gfp);
980         if (!ev) {
981                 cfg80211_put_bss(wdev->wiphy, info->bss);
982                 return;
983         }
984
985         ev->type = EVENT_ROAMED;
986         next = ((u8 *)ev) + sizeof(*ev);
987         if (info->req_ie_len) {
988                 ev->rm.req_ie = next;
989                 ev->rm.req_ie_len = info->req_ie_len;
990                 memcpy((void *)ev->rm.req_ie, info->req_ie, info->req_ie_len);
991                 next += info->req_ie_len;
992         }
993         if (info->resp_ie_len) {
994                 ev->rm.resp_ie = next;
995                 ev->rm.resp_ie_len = info->resp_ie_len;
996                 memcpy((void *)ev->rm.resp_ie, info->resp_ie,
997                        info->resp_ie_len);
998                 next += info->resp_ie_len;
999         }
1000         if (info->fils.kek_len) {
1001                 ev->rm.fils.kek = next;
1002                 ev->rm.fils.kek_len = info->fils.kek_len;
1003                 memcpy((void *)ev->rm.fils.kek, info->fils.kek,
1004                        info->fils.kek_len);
1005                 next += info->fils.kek_len;
1006         }
1007         if (info->fils.pmk_len) {
1008                 ev->rm.fils.pmk = next;
1009                 ev->rm.fils.pmk_len = info->fils.pmk_len;
1010                 memcpy((void *)ev->rm.fils.pmk, info->fils.pmk,
1011                        info->fils.pmk_len);
1012                 next += info->fils.pmk_len;
1013         }
1014         if (info->fils.pmkid) {
1015                 ev->rm.fils.pmkid = next;
1016                 memcpy((void *)ev->rm.fils.pmkid, info->fils.pmkid,
1017                        WLAN_PMKID_LEN);
1018                 next += WLAN_PMKID_LEN;
1019         }
1020         ev->rm.fils.update_erp_next_seq_num = info->fils.update_erp_next_seq_num;
1021         if (info->fils.update_erp_next_seq_num)
1022                 ev->rm.fils.erp_next_seq_num = info->fils.erp_next_seq_num;
1023         ev->rm.bss = info->bss;
1024
1025         spin_lock_irqsave(&wdev->event_lock, flags);
1026         list_add_tail(&ev->list, &wdev->event_list);
1027         spin_unlock_irqrestore(&wdev->event_lock, flags);
1028         queue_work(cfg80211_wq, &rdev->event_work);
1029 }
1030 EXPORT_SYMBOL(cfg80211_roamed);
1031
1032 void __cfg80211_port_authorized(struct wireless_dev *wdev, const u8 *bssid)
1033 {
1034         ASSERT_WDEV_LOCK(wdev);
1035
1036         if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION))
1037                 return;
1038
1039         if (WARN_ON(!wdev->current_bss) ||
1040             WARN_ON(!ether_addr_equal(wdev->current_bss->pub.bssid, bssid)))
1041                 return;
1042
1043         nl80211_send_port_authorized(wiphy_to_rdev(wdev->wiphy), wdev->netdev,
1044                                      bssid);
1045 }
1046
1047 void cfg80211_port_authorized(struct net_device *dev, const u8 *bssid,
1048                               gfp_t gfp)
1049 {
1050         struct wireless_dev *wdev = dev->ieee80211_ptr;
1051         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
1052         struct cfg80211_event *ev;
1053         unsigned long flags;
1054
1055         if (WARN_ON(!bssid))
1056                 return;
1057
1058         ev = kzalloc(sizeof(*ev), gfp);
1059         if (!ev)
1060                 return;
1061
1062         ev->type = EVENT_PORT_AUTHORIZED;
1063         memcpy(ev->pa.bssid, bssid, ETH_ALEN);
1064
1065         /*
1066          * Use the wdev event list so that if there are pending
1067          * connected/roamed events, they will be reported first.
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_port_authorized);
1075
1076 void __cfg80211_disconnected(struct net_device *dev, const u8 *ie,
1077                              size_t ie_len, u16 reason, bool from_ap)
1078 {
1079         struct wireless_dev *wdev = dev->ieee80211_ptr;
1080         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
1081         int i;
1082 #ifdef CONFIG_CFG80211_WEXT
1083         union iwreq_data wrqu;
1084 #endif
1085
1086         ASSERT_WDEV_LOCK(wdev);
1087
1088         if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION &&
1089                     wdev->iftype != NL80211_IFTYPE_P2P_CLIENT))
1090                 return;
1091
1092         if (wdev->current_bss) {
1093                 cfg80211_unhold_bss(wdev->current_bss);
1094                 cfg80211_put_bss(wdev->wiphy, &wdev->current_bss->pub);
1095         }
1096
1097         wdev->current_bss = NULL;
1098         wdev->ssid_len = 0;
1099         wdev->conn_owner_nlportid = 0;
1100         kfree_sensitive(wdev->connect_keys);
1101         wdev->connect_keys = NULL;
1102
1103         nl80211_send_disconnected(rdev, dev, reason, ie, ie_len, from_ap);
1104
1105         /* stop critical protocol if supported */
1106         if (rdev->ops->crit_proto_stop && rdev->crit_proto_nlportid) {
1107                 rdev->crit_proto_nlportid = 0;
1108                 rdev_crit_proto_stop(rdev, wdev);
1109         }
1110
1111         /*
1112          * Delete all the keys ... pairwise keys can't really
1113          * exist any more anyway, but default keys might.
1114          */
1115         if (rdev->ops->del_key) {
1116                 int max_key_idx = 5;
1117
1118                 if (wiphy_ext_feature_isset(
1119                             wdev->wiphy,
1120                             NL80211_EXT_FEATURE_BEACON_PROTECTION) ||
1121                     wiphy_ext_feature_isset(
1122                             wdev->wiphy,
1123                             NL80211_EXT_FEATURE_BEACON_PROTECTION_CLIENT))
1124                         max_key_idx = 7;
1125                 for (i = 0; i <= max_key_idx; i++)
1126                         rdev_del_key(rdev, dev, i, false, NULL);
1127         }
1128
1129         rdev_set_qos_map(rdev, dev, NULL);
1130
1131 #ifdef CONFIG_CFG80211_WEXT
1132         memset(&wrqu, 0, sizeof(wrqu));
1133         wrqu.ap_addr.sa_family = ARPHRD_ETHER;
1134         wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL);
1135         wdev->wext.connect.ssid_len = 0;
1136 #endif
1137
1138         schedule_work(&cfg80211_disconnect_work);
1139 }
1140
1141 void cfg80211_disconnected(struct net_device *dev, u16 reason,
1142                            const u8 *ie, size_t ie_len,
1143                            bool locally_generated, gfp_t gfp)
1144 {
1145         struct wireless_dev *wdev = dev->ieee80211_ptr;
1146         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
1147         struct cfg80211_event *ev;
1148         unsigned long flags;
1149
1150         ev = kzalloc(sizeof(*ev) + ie_len, gfp);
1151         if (!ev)
1152                 return;
1153
1154         ev->type = EVENT_DISCONNECTED;
1155         ev->dc.ie = ((u8 *)ev) + sizeof(*ev);
1156         ev->dc.ie_len = ie_len;
1157         memcpy((void *)ev->dc.ie, ie, ie_len);
1158         ev->dc.reason = reason;
1159         ev->dc.locally_generated = locally_generated;
1160
1161         spin_lock_irqsave(&wdev->event_lock, flags);
1162         list_add_tail(&ev->list, &wdev->event_list);
1163         spin_unlock_irqrestore(&wdev->event_lock, flags);
1164         queue_work(cfg80211_wq, &rdev->event_work);
1165 }
1166 EXPORT_SYMBOL(cfg80211_disconnected);
1167
1168 /*
1169  * API calls for nl80211/wext compatibility code
1170  */
1171 int cfg80211_connect(struct cfg80211_registered_device *rdev,
1172                      struct net_device *dev,
1173                      struct cfg80211_connect_params *connect,
1174                      struct cfg80211_cached_keys *connkeys,
1175                      const u8 *prev_bssid)
1176 {
1177         struct wireless_dev *wdev = dev->ieee80211_ptr;
1178         int err;
1179
1180         ASSERT_WDEV_LOCK(wdev);
1181
1182         /*
1183          * If we have an ssid_len, we're trying to connect or are
1184          * already connected, so reject a new SSID unless it's the
1185          * same (which is the case for re-association.)
1186          */
1187         if (wdev->ssid_len &&
1188             (wdev->ssid_len != connect->ssid_len ||
1189              memcmp(wdev->ssid, connect->ssid, wdev->ssid_len)))
1190                 return -EALREADY;
1191
1192         /*
1193          * If connected, reject (re-)association unless prev_bssid
1194          * matches the current BSSID.
1195          */
1196         if (wdev->current_bss) {
1197                 if (!prev_bssid)
1198                         return -EALREADY;
1199                 if (!ether_addr_equal(prev_bssid, wdev->current_bss->pub.bssid))
1200                         return -ENOTCONN;
1201         }
1202
1203         /*
1204          * Reject if we're in the process of connecting with WEP,
1205          * this case isn't very interesting and trying to handle
1206          * it would make the code much more complex.
1207          */
1208         if (wdev->connect_keys)
1209                 return -EINPROGRESS;
1210
1211         cfg80211_oper_and_ht_capa(&connect->ht_capa_mask,
1212                                   rdev->wiphy.ht_capa_mod_mask);
1213         cfg80211_oper_and_vht_capa(&connect->vht_capa_mask,
1214                                    rdev->wiphy.vht_capa_mod_mask);
1215
1216         if (connkeys && connkeys->def >= 0) {
1217                 int idx;
1218                 u32 cipher;
1219
1220                 idx = connkeys->def;
1221                 cipher = connkeys->params[idx].cipher;
1222                 /* If given a WEP key we may need it for shared key auth */
1223                 if (cipher == WLAN_CIPHER_SUITE_WEP40 ||
1224                     cipher == WLAN_CIPHER_SUITE_WEP104) {
1225                         connect->key_idx = idx;
1226                         connect->key = connkeys->params[idx].key;
1227                         connect->key_len = connkeys->params[idx].key_len;
1228
1229                         /*
1230                          * If ciphers are not set (e.g. when going through
1231                          * iwconfig), we have to set them appropriately here.
1232                          */
1233                         if (connect->crypto.cipher_group == 0)
1234                                 connect->crypto.cipher_group = cipher;
1235
1236                         if (connect->crypto.n_ciphers_pairwise == 0) {
1237                                 connect->crypto.n_ciphers_pairwise = 1;
1238                                 connect->crypto.ciphers_pairwise[0] = cipher;
1239                         }
1240                 }
1241
1242                 connect->crypto.wep_keys = connkeys->params;
1243                 connect->crypto.wep_tx_key = connkeys->def;
1244         } else {
1245                 if (WARN_ON(connkeys))
1246                         return -EINVAL;
1247         }
1248
1249         wdev->connect_keys = connkeys;
1250         memcpy(wdev->ssid, connect->ssid, connect->ssid_len);
1251         wdev->ssid_len = connect->ssid_len;
1252
1253         wdev->conn_bss_type = connect->pbss ? IEEE80211_BSS_TYPE_PBSS :
1254                                               IEEE80211_BSS_TYPE_ESS;
1255
1256         if (!rdev->ops->connect)
1257                 err = cfg80211_sme_connect(wdev, connect, prev_bssid);
1258         else
1259                 err = rdev_connect(rdev, dev, connect);
1260
1261         if (err) {
1262                 wdev->connect_keys = NULL;
1263                 /*
1264                  * This could be reassoc getting refused, don't clear
1265                  * ssid_len in that case.
1266                  */
1267                 if (!wdev->current_bss)
1268                         wdev->ssid_len = 0;
1269                 return err;
1270         }
1271
1272         return 0;
1273 }
1274
1275 int cfg80211_disconnect(struct cfg80211_registered_device *rdev,
1276                         struct net_device *dev, u16 reason, bool wextev)
1277 {
1278         struct wireless_dev *wdev = dev->ieee80211_ptr;
1279         int err = 0;
1280
1281         ASSERT_WDEV_LOCK(wdev);
1282
1283         kfree_sensitive(wdev->connect_keys);
1284         wdev->connect_keys = NULL;
1285
1286         wdev->conn_owner_nlportid = 0;
1287
1288         if (wdev->conn)
1289                 err = cfg80211_sme_disconnect(wdev, reason);
1290         else if (!rdev->ops->disconnect)
1291                 cfg80211_mlme_down(rdev, dev);
1292         else if (wdev->ssid_len)
1293                 err = rdev_disconnect(rdev, dev, reason);
1294
1295         /*
1296          * Clear ssid_len unless we actually were fully connected,
1297          * in which case cfg80211_disconnected() will take care of
1298          * this later.
1299          */
1300         if (!wdev->current_bss)
1301                 wdev->ssid_len = 0;
1302
1303         return err;
1304 }
1305
1306 /*
1307  * Used to clean up after the connection / connection attempt owner socket
1308  * disconnects
1309  */
1310 void cfg80211_autodisconnect_wk(struct work_struct *work)
1311 {
1312         struct wireless_dev *wdev =
1313                 container_of(work, struct wireless_dev, disconnect_wk);
1314         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
1315
1316         wdev_lock(wdev);
1317
1318         if (wdev->conn_owner_nlportid) {
1319                 switch (wdev->iftype) {
1320                 case NL80211_IFTYPE_ADHOC:
1321                         __cfg80211_leave_ibss(rdev, wdev->netdev, false);
1322                         break;
1323                 case NL80211_IFTYPE_AP:
1324                 case NL80211_IFTYPE_P2P_GO:
1325                         __cfg80211_stop_ap(rdev, wdev->netdev, false);
1326                         break;
1327                 case NL80211_IFTYPE_MESH_POINT:
1328                         __cfg80211_leave_mesh(rdev, wdev->netdev);
1329                         break;
1330                 case NL80211_IFTYPE_STATION:
1331                 case NL80211_IFTYPE_P2P_CLIENT:
1332                         /*
1333                          * Use disconnect_bssid if still connecting and
1334                          * ops->disconnect not implemented.  Otherwise we can
1335                          * use cfg80211_disconnect.
1336                          */
1337                         if (rdev->ops->disconnect || wdev->current_bss)
1338                                 cfg80211_disconnect(rdev, wdev->netdev,
1339                                                     WLAN_REASON_DEAUTH_LEAVING,
1340                                                     true);
1341                         else
1342                                 cfg80211_mlme_deauth(rdev, wdev->netdev,
1343                                                      wdev->disconnect_bssid,
1344                                                      NULL, 0,
1345                                                      WLAN_REASON_DEAUTH_LEAVING,
1346                                                      false);
1347                         break;
1348                 default:
1349                         break;
1350                 }
1351         }
1352
1353         wdev_unlock(wdev);
1354 }