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
cfg80211_sme_free(struct wireless_dev * wdev)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
cfg80211_conn_scan(struct wireless_dev * wdev)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_RTNL();
71 ASSERT_WDEV_LOCK(wdev);
72
73 if (rdev->scan_req || rdev->scan_msg)
74 return -EBUSY;
75
76 if (wdev->conn->params.channel)
77 n_channels = 1;
78 else
79 n_channels = ieee80211_get_num_supported_channels(wdev->wiphy);
80
81 request = kzalloc(sizeof(*request) + sizeof(request->ssids[0]) +
82 sizeof(request->channels[0]) * n_channels,
83 GFP_KERNEL);
84 if (!request)
85 return -ENOMEM;
86
87 if (wdev->conn->params.channel) {
88 enum nl80211_band band = wdev->conn->params.channel->band;
89 struct ieee80211_supported_band *sband =
90 wdev->wiphy->bands[band];
91
92 if (!sband) {
93 kfree(request);
94 return -EINVAL;
95 }
96 request->channels[0] = wdev->conn->params.channel;
97 request->rates[band] = (1 << sband->n_bitrates) - 1;
98 } else {
99 int i = 0, j;
100 enum nl80211_band band;
101 struct ieee80211_supported_band *bands;
102 struct ieee80211_channel *channel;
103
104 for (band = 0; band < NUM_NL80211_BANDS; band++) {
105 bands = wdev->wiphy->bands[band];
106 if (!bands)
107 continue;
108 for (j = 0; j < bands->n_channels; j++) {
109 channel = &bands->channels[j];
110 if (channel->flags & IEEE80211_CHAN_DISABLED)
111 continue;
112 request->channels[i++] = channel;
113 }
114 request->rates[band] = (1 << bands->n_bitrates) - 1;
115 }
116 n_channels = i;
117 }
118 request->n_channels = n_channels;
119 request->ssids = (void *)&request->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 = rdev_scan(rdev, request);
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
cfg80211_conn_do_work(struct wireless_dev * wdev,enum nl80211_timeout_reason * treason)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_assoc_request req = {};
152 int err;
153
154 ASSERT_WDEV_LOCK(wdev);
155
156 if (!wdev->conn)
157 return 0;
158
159 params = &wdev->conn->params;
160
161 switch (wdev->conn->state) {
162 case CFG80211_CONN_SCANNING:
163 /* didn't find it during scan ... */
164 return -ENOENT;
165 case CFG80211_CONN_SCAN_AGAIN:
166 return cfg80211_conn_scan(wdev);
167 case CFG80211_CONN_AUTHENTICATE_NEXT:
168 if (WARN_ON(!rdev->ops->auth))
169 return -EOPNOTSUPP;
170 wdev->conn->state = CFG80211_CONN_AUTHENTICATING;
171 return cfg80211_mlme_auth(rdev, wdev->netdev,
172 params->channel, params->auth_type,
173 params->bssid,
174 params->ssid, params->ssid_len,
175 NULL, 0,
176 params->key, params->key_len,
177 params->key_idx, NULL, 0);
178 case CFG80211_CONN_AUTH_FAILED_TIMEOUT:
179 *treason = NL80211_TIMEOUT_AUTH;
180 return -ENOTCONN;
181 case CFG80211_CONN_ASSOCIATE_NEXT:
182 if (WARN_ON(!rdev->ops->assoc))
183 return -EOPNOTSUPP;
184 wdev->conn->state = CFG80211_CONN_ASSOCIATING;
185 if (wdev->conn->prev_bssid_valid)
186 req.prev_bssid = wdev->conn->prev_bssid;
187 req.ie = params->ie;
188 req.ie_len = params->ie_len;
189 req.use_mfp = params->mfp != NL80211_MFP_NO;
190 req.crypto = params->crypto;
191 req.flags = params->flags;
192 req.ht_capa = params->ht_capa;
193 req.ht_capa_mask = params->ht_capa_mask;
194 req.vht_capa = params->vht_capa;
195 req.vht_capa_mask = params->vht_capa_mask;
196
197 err = cfg80211_mlme_assoc(rdev, wdev->netdev, params->channel,
198 params->bssid, params->ssid,
199 params->ssid_len, &req);
200 if (err)
201 cfg80211_mlme_deauth(rdev, wdev->netdev, params->bssid,
202 NULL, 0,
203 WLAN_REASON_DEAUTH_LEAVING,
204 false);
205 return err;
206 case CFG80211_CONN_ASSOC_FAILED_TIMEOUT:
207 *treason = NL80211_TIMEOUT_ASSOC;
208 fallthrough;
209 case CFG80211_CONN_ASSOC_FAILED:
210 cfg80211_mlme_deauth(rdev, wdev->netdev, params->bssid,
211 NULL, 0,
212 WLAN_REASON_DEAUTH_LEAVING, false);
213 return -ENOTCONN;
214 case CFG80211_CONN_DEAUTH:
215 cfg80211_mlme_deauth(rdev, wdev->netdev, params->bssid,
216 NULL, 0,
217 WLAN_REASON_DEAUTH_LEAVING, false);
218 fallthrough;
219 case CFG80211_CONN_ABANDON:
220 /* free directly, disconnected event already sent */
221 cfg80211_sme_free(wdev);
222 return 0;
223 default:
224 return 0;
225 }
226 }
227
cfg80211_conn_work(struct work_struct * work)228 void cfg80211_conn_work(struct work_struct *work)
229 {
230 struct cfg80211_registered_device *rdev =
231 container_of(work, struct cfg80211_registered_device, conn_work);
232 struct wireless_dev *wdev;
233 u8 bssid_buf[ETH_ALEN], *bssid = NULL;
234 enum nl80211_timeout_reason treason;
235
236 rtnl_lock();
237
238 list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) {
239 if (!wdev->netdev)
240 continue;
241
242 wdev_lock(wdev);
243 if (!netif_running(wdev->netdev)) {
244 wdev_unlock(wdev);
245 continue;
246 }
247 if (!wdev->conn ||
248 wdev->conn->state == CFG80211_CONN_CONNECTED) {
249 wdev_unlock(wdev);
250 continue;
251 }
252 if (wdev->conn->params.bssid) {
253 memcpy(bssid_buf, wdev->conn->params.bssid, ETH_ALEN);
254 bssid = bssid_buf;
255 }
256 treason = NL80211_TIMEOUT_UNSPECIFIED;
257 if (cfg80211_conn_do_work(wdev, &treason)) {
258 struct cfg80211_connect_resp_params cr;
259
260 memset(&cr, 0, sizeof(cr));
261 cr.status = -1;
262 cr.bssid = bssid;
263 cr.timeout_reason = treason;
264 __cfg80211_connect_result(wdev->netdev, &cr, false);
265 }
266 wdev_unlock(wdev);
267 }
268
269 rtnl_unlock();
270 }
271
272 /* Returned bss is reference counted and must be cleaned up appropriately. */
cfg80211_get_conn_bss(struct wireless_dev * wdev)273 static struct cfg80211_bss *cfg80211_get_conn_bss(struct wireless_dev *wdev)
274 {
275 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
276 struct cfg80211_bss *bss;
277
278 ASSERT_WDEV_LOCK(wdev);
279
280 bss = cfg80211_get_bss(wdev->wiphy, wdev->conn->params.channel,
281 wdev->conn->params.bssid,
282 wdev->conn->params.ssid,
283 wdev->conn->params.ssid_len,
284 wdev->conn_bss_type,
285 IEEE80211_PRIVACY(wdev->conn->params.privacy));
286 if (!bss)
287 return NULL;
288
289 memcpy(wdev->conn->bssid, bss->bssid, ETH_ALEN);
290 wdev->conn->params.bssid = wdev->conn->bssid;
291 wdev->conn->params.channel = bss->channel;
292 wdev->conn->state = CFG80211_CONN_AUTHENTICATE_NEXT;
293 schedule_work(&rdev->conn_work);
294
295 return bss;
296 }
297
__cfg80211_sme_scan_done(struct net_device * dev)298 static void __cfg80211_sme_scan_done(struct net_device *dev)
299 {
300 struct wireless_dev *wdev = dev->ieee80211_ptr;
301 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
302 struct cfg80211_bss *bss;
303
304 ASSERT_WDEV_LOCK(wdev);
305
306 if (!wdev->conn)
307 return;
308
309 if (wdev->conn->state != CFG80211_CONN_SCANNING &&
310 wdev->conn->state != CFG80211_CONN_SCAN_AGAIN)
311 return;
312
313 bss = cfg80211_get_conn_bss(wdev);
314 if (bss)
315 cfg80211_put_bss(&rdev->wiphy, bss);
316 else
317 schedule_work(&rdev->conn_work);
318 }
319
cfg80211_sme_scan_done(struct net_device * dev)320 void cfg80211_sme_scan_done(struct net_device *dev)
321 {
322 struct wireless_dev *wdev = dev->ieee80211_ptr;
323
324 wdev_lock(wdev);
325 __cfg80211_sme_scan_done(dev);
326 wdev_unlock(wdev);
327 }
328
cfg80211_sme_rx_auth(struct wireless_dev * wdev,const u8 * buf,size_t len)329 void cfg80211_sme_rx_auth(struct wireless_dev *wdev, const u8 *buf, size_t len)
330 {
331 struct wiphy *wiphy = wdev->wiphy;
332 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
333 struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)buf;
334 u16 status_code = le16_to_cpu(mgmt->u.auth.status_code);
335
336 ASSERT_WDEV_LOCK(wdev);
337
338 if (!wdev->conn || wdev->conn->state == CFG80211_CONN_CONNECTED)
339 return;
340
341 if (status_code == WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG &&
342 wdev->conn->auto_auth &&
343 wdev->conn->params.auth_type != NL80211_AUTHTYPE_NETWORK_EAP) {
344 /* select automatically between only open, shared, leap */
345 switch (wdev->conn->params.auth_type) {
346 case NL80211_AUTHTYPE_OPEN_SYSTEM:
347 if (wdev->connect_keys)
348 wdev->conn->params.auth_type =
349 NL80211_AUTHTYPE_SHARED_KEY;
350 else
351 wdev->conn->params.auth_type =
352 NL80211_AUTHTYPE_NETWORK_EAP;
353 break;
354 case NL80211_AUTHTYPE_SHARED_KEY:
355 wdev->conn->params.auth_type =
356 NL80211_AUTHTYPE_NETWORK_EAP;
357 break;
358 default:
359 /* huh? */
360 wdev->conn->params.auth_type =
361 NL80211_AUTHTYPE_OPEN_SYSTEM;
362 break;
363 }
364 wdev->conn->state = CFG80211_CONN_AUTHENTICATE_NEXT;
365 schedule_work(&rdev->conn_work);
366 } else if (status_code != WLAN_STATUS_SUCCESS) {
367 struct cfg80211_connect_resp_params cr;
368
369 memset(&cr, 0, sizeof(cr));
370 cr.status = status_code;
371 cr.bssid = mgmt->bssid;
372 cr.timeout_reason = NL80211_TIMEOUT_UNSPECIFIED;
373 __cfg80211_connect_result(wdev->netdev, &cr, false);
374 } else if (wdev->conn->state == CFG80211_CONN_AUTHENTICATING) {
375 wdev->conn->state = CFG80211_CONN_ASSOCIATE_NEXT;
376 schedule_work(&rdev->conn_work);
377 }
378 }
379
cfg80211_sme_rx_assoc_resp(struct wireless_dev * wdev,u16 status)380 bool cfg80211_sme_rx_assoc_resp(struct wireless_dev *wdev, u16 status)
381 {
382 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
383
384 if (!wdev->conn)
385 return false;
386
387 if (status == WLAN_STATUS_SUCCESS) {
388 wdev->conn->state = CFG80211_CONN_CONNECTED;
389 return false;
390 }
391
392 if (wdev->conn->prev_bssid_valid) {
393 /*
394 * Some stupid APs don't accept reassoc, so we
395 * need to fall back to trying regular assoc;
396 * return true so no event is sent to userspace.
397 */
398 wdev->conn->prev_bssid_valid = false;
399 wdev->conn->state = CFG80211_CONN_ASSOCIATE_NEXT;
400 schedule_work(&rdev->conn_work);
401 return true;
402 }
403
404 wdev->conn->state = CFG80211_CONN_ASSOC_FAILED;
405 schedule_work(&rdev->conn_work);
406 return false;
407 }
408
cfg80211_sme_deauth(struct wireless_dev * wdev)409 void cfg80211_sme_deauth(struct wireless_dev *wdev)
410 {
411 cfg80211_sme_free(wdev);
412 }
413
cfg80211_sme_auth_timeout(struct wireless_dev * wdev)414 void cfg80211_sme_auth_timeout(struct wireless_dev *wdev)
415 {
416 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
417
418 if (!wdev->conn)
419 return;
420
421 wdev->conn->state = CFG80211_CONN_AUTH_FAILED_TIMEOUT;
422 schedule_work(&rdev->conn_work);
423 }
424
cfg80211_sme_disassoc(struct wireless_dev * wdev)425 void cfg80211_sme_disassoc(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_DEAUTH;
433 schedule_work(&rdev->conn_work);
434 }
435
cfg80211_sme_assoc_timeout(struct wireless_dev * wdev)436 void cfg80211_sme_assoc_timeout(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_ASSOC_FAILED_TIMEOUT;
444 schedule_work(&rdev->conn_work);
445 }
446
cfg80211_sme_abandon_assoc(struct wireless_dev * wdev)447 void cfg80211_sme_abandon_assoc(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_ABANDON;
455 schedule_work(&rdev->conn_work);
456 }
457
cfg80211_sme_get_conn_ies(struct wireless_dev * wdev,const u8 * ies,size_t ies_len,const u8 ** out_ies,size_t * out_ies_len)458 static int cfg80211_sme_get_conn_ies(struct wireless_dev *wdev,
459 const u8 *ies, size_t ies_len,
460 const u8 **out_ies, size_t *out_ies_len)
461 {
462 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
463 u8 *buf;
464 size_t offs;
465
466 if (!rdev->wiphy.extended_capabilities_len ||
467 (ies && cfg80211_find_ie(WLAN_EID_EXT_CAPABILITY, ies, ies_len))) {
468 *out_ies = kmemdup(ies, ies_len, GFP_KERNEL);
469 if (!*out_ies)
470 return -ENOMEM;
471 *out_ies_len = ies_len;
472 return 0;
473 }
474
475 buf = kmalloc(ies_len + rdev->wiphy.extended_capabilities_len + 2,
476 GFP_KERNEL);
477 if (!buf)
478 return -ENOMEM;
479
480 if (ies_len) {
481 static const u8 before_extcapa[] = {
482 /* not listing IEs expected to be created by driver */
483 WLAN_EID_RSN,
484 WLAN_EID_QOS_CAPA,
485 WLAN_EID_RRM_ENABLED_CAPABILITIES,
486 WLAN_EID_MOBILITY_DOMAIN,
487 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
488 WLAN_EID_BSS_COEX_2040,
489 };
490
491 offs = ieee80211_ie_split(ies, ies_len, before_extcapa,
492 ARRAY_SIZE(before_extcapa), 0);
493 memcpy(buf, ies, offs);
494 /* leave a whole for extended capabilities IE */
495 memcpy(buf + offs + rdev->wiphy.extended_capabilities_len + 2,
496 ies + offs, ies_len - offs);
497 } else {
498 offs = 0;
499 }
500
501 /* place extended capabilities IE (with only driver capabilities) */
502 buf[offs] = WLAN_EID_EXT_CAPABILITY;
503 buf[offs + 1] = rdev->wiphy.extended_capabilities_len;
504 memcpy(buf + offs + 2,
505 rdev->wiphy.extended_capabilities,
506 rdev->wiphy.extended_capabilities_len);
507
508 *out_ies = buf;
509 *out_ies_len = ies_len + rdev->wiphy.extended_capabilities_len + 2;
510
511 return 0;
512 }
513
cfg80211_sme_connect(struct wireless_dev * wdev,struct cfg80211_connect_params * connect,const u8 * prev_bssid)514 static int cfg80211_sme_connect(struct wireless_dev *wdev,
515 struct cfg80211_connect_params *connect,
516 const u8 *prev_bssid)
517 {
518 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
519 struct cfg80211_bss *bss;
520 int err;
521
522 if (!rdev->ops->auth || !rdev->ops->assoc)
523 return -EOPNOTSUPP;
524
525 if (wdev->current_bss) {
526 cfg80211_unhold_bss(wdev->current_bss);
527 cfg80211_put_bss(wdev->wiphy, &wdev->current_bss->pub);
528 wdev->current_bss = NULL;
529
530 cfg80211_sme_free(wdev);
531 }
532
533 if (WARN_ON(wdev->conn))
534 return -EINPROGRESS;
535
536 wdev->conn = kzalloc(sizeof(*wdev->conn), GFP_KERNEL);
537 if (!wdev->conn)
538 return -ENOMEM;
539
540 /*
541 * Copy all parameters, and treat explicitly IEs, BSSID, SSID.
542 */
543 memcpy(&wdev->conn->params, connect, sizeof(*connect));
544 if (connect->bssid) {
545 wdev->conn->params.bssid = wdev->conn->bssid;
546 memcpy(wdev->conn->bssid, connect->bssid, ETH_ALEN);
547 }
548
549 if (cfg80211_sme_get_conn_ies(wdev, connect->ie, connect->ie_len,
550 &wdev->conn->ie,
551 &wdev->conn->params.ie_len)) {
552 kfree(wdev->conn);
553 wdev->conn = NULL;
554 return -ENOMEM;
555 }
556 wdev->conn->params.ie = wdev->conn->ie;
557
558 if (connect->auth_type == NL80211_AUTHTYPE_AUTOMATIC) {
559 wdev->conn->auto_auth = true;
560 /* start with open system ... should mostly work */
561 wdev->conn->params.auth_type =
562 NL80211_AUTHTYPE_OPEN_SYSTEM;
563 } else {
564 wdev->conn->auto_auth = false;
565 }
566
567 wdev->conn->params.ssid = wdev->ssid;
568 wdev->conn->params.ssid_len = wdev->ssid_len;
569
570 /* see if we have the bss already */
571 bss = cfg80211_get_conn_bss(wdev);
572
573 if (prev_bssid) {
574 memcpy(wdev->conn->prev_bssid, prev_bssid, ETH_ALEN);
575 wdev->conn->prev_bssid_valid = true;
576 }
577
578 /* we're good if we have a matching bss struct */
579 if (bss) {
580 enum nl80211_timeout_reason treason;
581
582 err = cfg80211_conn_do_work(wdev, &treason);
583 cfg80211_put_bss(wdev->wiphy, bss);
584 } else {
585 /* otherwise we'll need to scan for the AP first */
586 err = cfg80211_conn_scan(wdev);
587
588 /*
589 * If we can't scan right now, then we need to scan again
590 * after the current scan finished, since the parameters
591 * changed (unless we find a good AP anyway).
592 */
593 if (err == -EBUSY) {
594 err = 0;
595 wdev->conn->state = CFG80211_CONN_SCAN_AGAIN;
596 }
597 }
598
599 if (err)
600 cfg80211_sme_free(wdev);
601
602 return err;
603 }
604
cfg80211_sme_disconnect(struct wireless_dev * wdev,u16 reason)605 static int cfg80211_sme_disconnect(struct wireless_dev *wdev, u16 reason)
606 {
607 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
608 int err;
609
610 if (!wdev->conn)
611 return 0;
612
613 if (!rdev->ops->deauth)
614 return -EOPNOTSUPP;
615
616 if (wdev->conn->state == CFG80211_CONN_SCANNING ||
617 wdev->conn->state == CFG80211_CONN_SCAN_AGAIN) {
618 err = 0;
619 goto out;
620 }
621
622 /* wdev->conn->params.bssid must be set if > SCANNING */
623 err = cfg80211_mlme_deauth(rdev, wdev->netdev,
624 wdev->conn->params.bssid,
625 NULL, 0, reason, false);
626 out:
627 cfg80211_sme_free(wdev);
628 return err;
629 }
630
631 /*
632 * code shared for in-device and software SME
633 */
634
cfg80211_is_all_idle(void)635 static bool cfg80211_is_all_idle(void)
636 {
637 struct cfg80211_registered_device *rdev;
638 struct wireless_dev *wdev;
639 bool is_all_idle = true;
640
641 /*
642 * All devices must be idle as otherwise if you are actively
643 * scanning some new beacon hints could be learned and would
644 * count as new regulatory hints.
645 * Also if there is any other active beaconing interface we
646 * need not issue a disconnect hint and reset any info such
647 * as chan dfs state, etc.
648 */
649 list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
650 list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) {
651 wdev_lock(wdev);
652 if (wdev->conn || wdev->current_bss ||
653 cfg80211_beaconing_iface_active(wdev))
654 is_all_idle = false;
655 wdev_unlock(wdev);
656 }
657 }
658
659 return is_all_idle;
660 }
661
disconnect_work(struct work_struct * work)662 static void disconnect_work(struct work_struct *work)
663 {
664 rtnl_lock();
665 if (cfg80211_is_all_idle())
666 regulatory_hint_disconnect();
667 rtnl_unlock();
668 }
669
670 DECLARE_WORK(cfg80211_disconnect_work, disconnect_work);
671
672
673 /*
674 * API calls for drivers implementing connect/disconnect and
675 * SME event handling
676 */
677
678 /* This method must consume bss one way or another */
__cfg80211_connect_result(struct net_device * dev,struct cfg80211_connect_resp_params * cr,bool wextev)679 void __cfg80211_connect_result(struct net_device *dev,
680 struct cfg80211_connect_resp_params *cr,
681 bool wextev)
682 {
683 struct wireless_dev *wdev = dev->ieee80211_ptr;
684 const u8 *country_ie;
685 #ifdef CONFIG_CFG80211_WEXT
686 union iwreq_data wrqu;
687 #endif
688
689 ASSERT_WDEV_LOCK(wdev);
690
691 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION &&
692 wdev->iftype != NL80211_IFTYPE_P2P_CLIENT)) {
693 cfg80211_put_bss(wdev->wiphy, cr->bss);
694 return;
695 }
696
697 wdev->unprot_beacon_reported = 0;
698 nl80211_send_connect_result(wiphy_to_rdev(wdev->wiphy), dev, cr,
699 GFP_KERNEL);
700
701 #ifdef CONFIG_CFG80211_WEXT
702 if (wextev) {
703 if (cr->req_ie && cr->status == WLAN_STATUS_SUCCESS) {
704 memset(&wrqu, 0, sizeof(wrqu));
705 wrqu.data.length = cr->req_ie_len;
706 wireless_send_event(dev, IWEVASSOCREQIE, &wrqu,
707 cr->req_ie);
708 }
709
710 if (cr->resp_ie && cr->status == WLAN_STATUS_SUCCESS) {
711 memset(&wrqu, 0, sizeof(wrqu));
712 wrqu.data.length = cr->resp_ie_len;
713 wireless_send_event(dev, IWEVASSOCRESPIE, &wrqu,
714 cr->resp_ie);
715 }
716
717 memset(&wrqu, 0, sizeof(wrqu));
718 wrqu.ap_addr.sa_family = ARPHRD_ETHER;
719 if (cr->bssid && cr->status == WLAN_STATUS_SUCCESS) {
720 memcpy(wrqu.ap_addr.sa_data, cr->bssid, ETH_ALEN);
721 memcpy(wdev->wext.prev_bssid, cr->bssid, ETH_ALEN);
722 wdev->wext.prev_bssid_valid = true;
723 }
724 wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL);
725 }
726 #endif
727
728 if (!cr->bss && (cr->status == WLAN_STATUS_SUCCESS)) {
729 WARN_ON_ONCE(!wiphy_to_rdev(wdev->wiphy)->ops->connect);
730 cr->bss = cfg80211_get_bss(wdev->wiphy, NULL, cr->bssid,
731 wdev->ssid, wdev->ssid_len,
732 wdev->conn_bss_type,
733 IEEE80211_PRIVACY_ANY);
734 if (cr->bss)
735 cfg80211_hold_bss(bss_from_pub(cr->bss));
736 }
737
738 if (wdev->current_bss) {
739 cfg80211_unhold_bss(wdev->current_bss);
740 cfg80211_put_bss(wdev->wiphy, &wdev->current_bss->pub);
741 wdev->current_bss = NULL;
742 }
743
744 if (cr->status != WLAN_STATUS_SUCCESS) {
745 kfree_sensitive(wdev->connect_keys);
746 wdev->connect_keys = NULL;
747 wdev->ssid_len = 0;
748 wdev->conn_owner_nlportid = 0;
749 if (cr->bss) {
750 cfg80211_unhold_bss(bss_from_pub(cr->bss));
751 cfg80211_put_bss(wdev->wiphy, cr->bss);
752 }
753 cfg80211_sme_free(wdev);
754 return;
755 }
756
757 if (WARN_ON(!cr->bss))
758 return;
759
760 wdev->current_bss = bss_from_pub(cr->bss);
761
762 if (!(wdev->wiphy->flags & WIPHY_FLAG_HAS_STATIC_WEP))
763 cfg80211_upload_connect_keys(wdev);
764
765 rcu_read_lock();
766 country_ie = ieee80211_bss_get_ie(cr->bss, WLAN_EID_COUNTRY);
767 if (!country_ie) {
768 rcu_read_unlock();
769 return;
770 }
771
772 country_ie = kmemdup(country_ie, 2 + country_ie[1], GFP_ATOMIC);
773 rcu_read_unlock();
774
775 if (!country_ie)
776 return;
777
778 /*
779 * ieee80211_bss_get_ie() ensures we can access:
780 * - country_ie + 2, the start of the country ie data, and
781 * - and country_ie[1] which is the IE length
782 */
783 regulatory_hint_country_ie(wdev->wiphy, cr->bss->channel->band,
784 country_ie + 2, country_ie[1]);
785 kfree(country_ie);
786 }
787
788 /* Consumes bss object one way or another */
cfg80211_connect_done(struct net_device * dev,struct cfg80211_connect_resp_params * params,gfp_t gfp)789 void cfg80211_connect_done(struct net_device *dev,
790 struct cfg80211_connect_resp_params *params,
791 gfp_t gfp)
792 {
793 struct wireless_dev *wdev = dev->ieee80211_ptr;
794 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
795 struct cfg80211_event *ev;
796 unsigned long flags;
797 u8 *next;
798
799 if (params->bss) {
800 struct cfg80211_internal_bss *ibss = bss_from_pub(params->bss);
801
802 if (list_empty(&ibss->list)) {
803 struct cfg80211_bss *found = NULL, *tmp = params->bss;
804
805 found = cfg80211_get_bss(wdev->wiphy, NULL,
806 params->bss->bssid,
807 wdev->ssid, wdev->ssid_len,
808 wdev->conn_bss_type,
809 IEEE80211_PRIVACY_ANY);
810 if (found) {
811 /* The same BSS is already updated so use it
812 * instead, as it has latest info.
813 */
814 params->bss = found;
815 } else {
816 /* Update with BSS provided by driver, it will
817 * be freshly added and ref cnted, we can free
818 * the old one.
819 *
820 * signal_valid can be false, as we are not
821 * expecting the BSS to be found.
822 *
823 * keep the old timestamp to avoid confusion
824 */
825 cfg80211_bss_update(rdev, ibss, false,
826 ibss->ts);
827 }
828
829 cfg80211_put_bss(wdev->wiphy, tmp);
830 }
831 }
832
833 ev = kzalloc(sizeof(*ev) + (params->bssid ? ETH_ALEN : 0) +
834 params->req_ie_len + params->resp_ie_len +
835 params->fils.kek_len + params->fils.pmk_len +
836 (params->fils.pmkid ? WLAN_PMKID_LEN : 0), gfp);
837 if (!ev) {
838 cfg80211_put_bss(wdev->wiphy, params->bss);
839 return;
840 }
841
842 ev->type = EVENT_CONNECT_RESULT;
843 next = ((u8 *)ev) + sizeof(*ev);
844 if (params->bssid) {
845 ev->cr.bssid = next;
846 memcpy((void *)ev->cr.bssid, params->bssid, ETH_ALEN);
847 next += ETH_ALEN;
848 }
849 if (params->req_ie_len) {
850 ev->cr.req_ie = next;
851 ev->cr.req_ie_len = params->req_ie_len;
852 memcpy((void *)ev->cr.req_ie, params->req_ie,
853 params->req_ie_len);
854 next += params->req_ie_len;
855 }
856 if (params->resp_ie_len) {
857 ev->cr.resp_ie = next;
858 ev->cr.resp_ie_len = params->resp_ie_len;
859 memcpy((void *)ev->cr.resp_ie, params->resp_ie,
860 params->resp_ie_len);
861 next += params->resp_ie_len;
862 }
863 if (params->fils.kek_len) {
864 ev->cr.fils.kek = next;
865 ev->cr.fils.kek_len = params->fils.kek_len;
866 memcpy((void *)ev->cr.fils.kek, params->fils.kek,
867 params->fils.kek_len);
868 next += params->fils.kek_len;
869 }
870 if (params->fils.pmk_len) {
871 ev->cr.fils.pmk = next;
872 ev->cr.fils.pmk_len = params->fils.pmk_len;
873 memcpy((void *)ev->cr.fils.pmk, params->fils.pmk,
874 params->fils.pmk_len);
875 next += params->fils.pmk_len;
876 }
877 if (params->fils.pmkid) {
878 ev->cr.fils.pmkid = next;
879 memcpy((void *)ev->cr.fils.pmkid, params->fils.pmkid,
880 WLAN_PMKID_LEN);
881 next += WLAN_PMKID_LEN;
882 }
883 ev->cr.fils.update_erp_next_seq_num = params->fils.update_erp_next_seq_num;
884 if (params->fils.update_erp_next_seq_num)
885 ev->cr.fils.erp_next_seq_num = params->fils.erp_next_seq_num;
886 if (params->bss)
887 cfg80211_hold_bss(bss_from_pub(params->bss));
888 ev->cr.bss = params->bss;
889 ev->cr.status = params->status;
890 ev->cr.timeout_reason = params->timeout_reason;
891
892 spin_lock_irqsave(&wdev->event_lock, flags);
893 list_add_tail(&ev->list, &wdev->event_list);
894 spin_unlock_irqrestore(&wdev->event_lock, flags);
895 queue_work(cfg80211_wq, &rdev->event_work);
896 }
897 EXPORT_SYMBOL(cfg80211_connect_done);
898
899 /* Consumes bss object one way or another */
__cfg80211_roamed(struct wireless_dev * wdev,struct cfg80211_roam_info * info)900 void __cfg80211_roamed(struct wireless_dev *wdev,
901 struct cfg80211_roam_info *info)
902 {
903 #ifdef CONFIG_CFG80211_WEXT
904 union iwreq_data wrqu;
905 #endif
906 ASSERT_WDEV_LOCK(wdev);
907
908 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION &&
909 wdev->iftype != NL80211_IFTYPE_P2P_CLIENT))
910 goto out;
911
912 if (WARN_ON(!wdev->current_bss))
913 goto out;
914
915 cfg80211_unhold_bss(wdev->current_bss);
916 cfg80211_put_bss(wdev->wiphy, &wdev->current_bss->pub);
917 wdev->current_bss = NULL;
918
919 if (WARN_ON(!info->bss))
920 return;
921
922 cfg80211_hold_bss(bss_from_pub(info->bss));
923 wdev->current_bss = bss_from_pub(info->bss);
924
925 wdev->unprot_beacon_reported = 0;
926 nl80211_send_roamed(wiphy_to_rdev(wdev->wiphy),
927 wdev->netdev, info, GFP_KERNEL);
928
929 #ifdef CONFIG_CFG80211_WEXT
930 if (info->req_ie) {
931 memset(&wrqu, 0, sizeof(wrqu));
932 wrqu.data.length = info->req_ie_len;
933 wireless_send_event(wdev->netdev, IWEVASSOCREQIE,
934 &wrqu, info->req_ie);
935 }
936
937 if (info->resp_ie) {
938 memset(&wrqu, 0, sizeof(wrqu));
939 wrqu.data.length = info->resp_ie_len;
940 wireless_send_event(wdev->netdev, IWEVASSOCRESPIE,
941 &wrqu, info->resp_ie);
942 }
943
944 memset(&wrqu, 0, sizeof(wrqu));
945 wrqu.ap_addr.sa_family = ARPHRD_ETHER;
946 memcpy(wrqu.ap_addr.sa_data, info->bss->bssid, ETH_ALEN);
947 memcpy(wdev->wext.prev_bssid, info->bss->bssid, ETH_ALEN);
948 wdev->wext.prev_bssid_valid = true;
949 wireless_send_event(wdev->netdev, SIOCGIWAP, &wrqu, NULL);
950 #endif
951
952 return;
953 out:
954 cfg80211_put_bss(wdev->wiphy, info->bss);
955 }
956
957 /* Consumes info->bss object one way or another */
cfg80211_roamed(struct net_device * dev,struct cfg80211_roam_info * info,gfp_t gfp)958 void cfg80211_roamed(struct net_device *dev, struct cfg80211_roam_info *info,
959 gfp_t gfp)
960 {
961 struct wireless_dev *wdev = dev->ieee80211_ptr;
962 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
963 struct cfg80211_event *ev;
964 unsigned long flags;
965 u8 *next;
966
967 if (!info->bss) {
968 info->bss = cfg80211_get_bss(wdev->wiphy, info->channel,
969 info->bssid, wdev->ssid,
970 wdev->ssid_len,
971 wdev->conn_bss_type,
972 IEEE80211_PRIVACY_ANY);
973 }
974
975 if (WARN_ON(!info->bss))
976 return;
977
978 ev = kzalloc(sizeof(*ev) + info->req_ie_len + info->resp_ie_len +
979 info->fils.kek_len + info->fils.pmk_len +
980 (info->fils.pmkid ? WLAN_PMKID_LEN : 0), gfp);
981 if (!ev) {
982 cfg80211_put_bss(wdev->wiphy, info->bss);
983 return;
984 }
985
986 ev->type = EVENT_ROAMED;
987 next = ((u8 *)ev) + sizeof(*ev);
988 if (info->req_ie_len) {
989 ev->rm.req_ie = next;
990 ev->rm.req_ie_len = info->req_ie_len;
991 memcpy((void *)ev->rm.req_ie, info->req_ie, info->req_ie_len);
992 next += info->req_ie_len;
993 }
994 if (info->resp_ie_len) {
995 ev->rm.resp_ie = next;
996 ev->rm.resp_ie_len = info->resp_ie_len;
997 memcpy((void *)ev->rm.resp_ie, info->resp_ie,
998 info->resp_ie_len);
999 next += info->resp_ie_len;
1000 }
1001 if (info->fils.kek_len) {
1002 ev->rm.fils.kek = next;
1003 ev->rm.fils.kek_len = info->fils.kek_len;
1004 memcpy((void *)ev->rm.fils.kek, info->fils.kek,
1005 info->fils.kek_len);
1006 next += info->fils.kek_len;
1007 }
1008 if (info->fils.pmk_len) {
1009 ev->rm.fils.pmk = next;
1010 ev->rm.fils.pmk_len = info->fils.pmk_len;
1011 memcpy((void *)ev->rm.fils.pmk, info->fils.pmk,
1012 info->fils.pmk_len);
1013 next += info->fils.pmk_len;
1014 }
1015 if (info->fils.pmkid) {
1016 ev->rm.fils.pmkid = next;
1017 memcpy((void *)ev->rm.fils.pmkid, info->fils.pmkid,
1018 WLAN_PMKID_LEN);
1019 next += WLAN_PMKID_LEN;
1020 }
1021 ev->rm.fils.update_erp_next_seq_num = info->fils.update_erp_next_seq_num;
1022 if (info->fils.update_erp_next_seq_num)
1023 ev->rm.fils.erp_next_seq_num = info->fils.erp_next_seq_num;
1024 ev->rm.bss = info->bss;
1025
1026 spin_lock_irqsave(&wdev->event_lock, flags);
1027 list_add_tail(&ev->list, &wdev->event_list);
1028 spin_unlock_irqrestore(&wdev->event_lock, flags);
1029 queue_work(cfg80211_wq, &rdev->event_work);
1030 }
1031 EXPORT_SYMBOL(cfg80211_roamed);
1032
__cfg80211_port_authorized(struct wireless_dev * wdev,const u8 * bssid)1033 void __cfg80211_port_authorized(struct wireless_dev *wdev, const u8 *bssid)
1034 {
1035 ASSERT_WDEV_LOCK(wdev);
1036
1037 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION))
1038 return;
1039
1040 if (WARN_ON(!wdev->current_bss) ||
1041 WARN_ON(!ether_addr_equal(wdev->current_bss->pub.bssid, bssid)))
1042 return;
1043
1044 nl80211_send_port_authorized(wiphy_to_rdev(wdev->wiphy), wdev->netdev,
1045 bssid);
1046 }
1047
cfg80211_port_authorized(struct net_device * dev,const u8 * bssid,gfp_t gfp)1048 void cfg80211_port_authorized(struct net_device *dev, const u8 *bssid,
1049 gfp_t gfp)
1050 {
1051 struct wireless_dev *wdev = dev->ieee80211_ptr;
1052 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
1053 struct cfg80211_event *ev;
1054 unsigned long flags;
1055
1056 if (WARN_ON(!bssid))
1057 return;
1058
1059 ev = kzalloc(sizeof(*ev), gfp);
1060 if (!ev)
1061 return;
1062
1063 ev->type = EVENT_PORT_AUTHORIZED;
1064 memcpy(ev->pa.bssid, bssid, ETH_ALEN);
1065
1066 /*
1067 * Use the wdev event list so that if there are pending
1068 * connected/roamed events, they will be reported first.
1069 */
1070 spin_lock_irqsave(&wdev->event_lock, flags);
1071 list_add_tail(&ev->list, &wdev->event_list);
1072 spin_unlock_irqrestore(&wdev->event_lock, flags);
1073 queue_work(cfg80211_wq, &rdev->event_work);
1074 }
1075 EXPORT_SYMBOL(cfg80211_port_authorized);
1076
__cfg80211_disconnected(struct net_device * dev,const u8 * ie,size_t ie_len,u16 reason,bool from_ap)1077 void __cfg80211_disconnected(struct net_device *dev, const u8 *ie,
1078 size_t ie_len, u16 reason, bool from_ap)
1079 {
1080 struct wireless_dev *wdev = dev->ieee80211_ptr;
1081 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
1082 int i;
1083 #ifdef CONFIG_CFG80211_WEXT
1084 union iwreq_data wrqu;
1085 #endif
1086
1087 ASSERT_WDEV_LOCK(wdev);
1088
1089 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION &&
1090 wdev->iftype != NL80211_IFTYPE_P2P_CLIENT))
1091 return;
1092
1093 if (wdev->current_bss) {
1094 cfg80211_unhold_bss(wdev->current_bss);
1095 cfg80211_put_bss(wdev->wiphy, &wdev->current_bss->pub);
1096 }
1097
1098 wdev->current_bss = NULL;
1099 wdev->ssid_len = 0;
1100 wdev->conn_owner_nlportid = 0;
1101 kfree_sensitive(wdev->connect_keys);
1102 wdev->connect_keys = NULL;
1103
1104 nl80211_send_disconnected(rdev, dev, reason, ie, ie_len, from_ap);
1105
1106 /* stop critical protocol if supported */
1107 if (rdev->ops->crit_proto_stop && rdev->crit_proto_nlportid) {
1108 rdev->crit_proto_nlportid = 0;
1109 rdev_crit_proto_stop(rdev, wdev);
1110 }
1111
1112 /*
1113 * Delete all the keys ... pairwise keys can't really
1114 * exist any more anyway, but default keys might.
1115 */
1116 if (rdev->ops->del_key) {
1117 int max_key_idx = 5;
1118
1119 if (wiphy_ext_feature_isset(
1120 wdev->wiphy,
1121 NL80211_EXT_FEATURE_BEACON_PROTECTION) ||
1122 wiphy_ext_feature_isset(
1123 wdev->wiphy,
1124 NL80211_EXT_FEATURE_BEACON_PROTECTION_CLIENT))
1125 max_key_idx = 7;
1126 for (i = 0; i <= max_key_idx; i++)
1127 rdev_del_key(rdev, dev, i, false, NULL);
1128 }
1129
1130 rdev_set_qos_map(rdev, dev, NULL);
1131
1132 #ifdef CONFIG_CFG80211_WEXT
1133 memset(&wrqu, 0, sizeof(wrqu));
1134 wrqu.ap_addr.sa_family = ARPHRD_ETHER;
1135 wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL);
1136 wdev->wext.connect.ssid_len = 0;
1137 #endif
1138
1139 schedule_work(&cfg80211_disconnect_work);
1140 }
1141
cfg80211_disconnected(struct net_device * dev,u16 reason,const u8 * ie,size_t ie_len,bool locally_generated,gfp_t gfp)1142 void cfg80211_disconnected(struct net_device *dev, u16 reason,
1143 const u8 *ie, size_t ie_len,
1144 bool locally_generated, gfp_t gfp)
1145 {
1146 struct wireless_dev *wdev = dev->ieee80211_ptr;
1147 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
1148 struct cfg80211_event *ev;
1149 unsigned long flags;
1150
1151 ev = kzalloc(sizeof(*ev) + ie_len, gfp);
1152 if (!ev)
1153 return;
1154
1155 ev->type = EVENT_DISCONNECTED;
1156 ev->dc.ie = ((u8 *)ev) + sizeof(*ev);
1157 ev->dc.ie_len = ie_len;
1158 memcpy((void *)ev->dc.ie, ie, ie_len);
1159 ev->dc.reason = reason;
1160 ev->dc.locally_generated = locally_generated;
1161
1162 spin_lock_irqsave(&wdev->event_lock, flags);
1163 list_add_tail(&ev->list, &wdev->event_list);
1164 spin_unlock_irqrestore(&wdev->event_lock, flags);
1165 queue_work(cfg80211_wq, &rdev->event_work);
1166 }
1167 EXPORT_SYMBOL(cfg80211_disconnected);
1168
1169 /*
1170 * API calls for nl80211/wext compatibility code
1171 */
cfg80211_connect(struct cfg80211_registered_device * rdev,struct net_device * dev,struct cfg80211_connect_params * connect,struct cfg80211_cached_keys * connkeys,const u8 * prev_bssid)1172 int cfg80211_connect(struct cfg80211_registered_device *rdev,
1173 struct net_device *dev,
1174 struct cfg80211_connect_params *connect,
1175 struct cfg80211_cached_keys *connkeys,
1176 const u8 *prev_bssid)
1177 {
1178 struct wireless_dev *wdev = dev->ieee80211_ptr;
1179 int err;
1180
1181 ASSERT_WDEV_LOCK(wdev);
1182
1183 /*
1184 * If we have an ssid_len, we're trying to connect or are
1185 * already connected, so reject a new SSID unless it's the
1186 * same (which is the case for re-association.)
1187 */
1188 if (wdev->ssid_len &&
1189 (wdev->ssid_len != connect->ssid_len ||
1190 memcmp(wdev->ssid, connect->ssid, wdev->ssid_len)))
1191 return -EALREADY;
1192
1193 /*
1194 * If connected, reject (re-)association unless prev_bssid
1195 * matches the current BSSID.
1196 */
1197 if (wdev->current_bss) {
1198 if (!prev_bssid)
1199 return -EALREADY;
1200 if (!ether_addr_equal(prev_bssid, wdev->current_bss->pub.bssid))
1201 return -ENOTCONN;
1202 }
1203
1204 /*
1205 * Reject if we're in the process of connecting with WEP,
1206 * this case isn't very interesting and trying to handle
1207 * it would make the code much more complex.
1208 */
1209 if (wdev->connect_keys)
1210 return -EINPROGRESS;
1211
1212 cfg80211_oper_and_ht_capa(&connect->ht_capa_mask,
1213 rdev->wiphy.ht_capa_mod_mask);
1214 cfg80211_oper_and_vht_capa(&connect->vht_capa_mask,
1215 rdev->wiphy.vht_capa_mod_mask);
1216
1217 if (connkeys && connkeys->def >= 0) {
1218 int idx;
1219 u32 cipher;
1220
1221 idx = connkeys->def;
1222 cipher = connkeys->params[idx].cipher;
1223 /* If given a WEP key we may need it for shared key auth */
1224 if (cipher == WLAN_CIPHER_SUITE_WEP40 ||
1225 cipher == WLAN_CIPHER_SUITE_WEP104) {
1226 connect->key_idx = idx;
1227 connect->key = connkeys->params[idx].key;
1228 connect->key_len = connkeys->params[idx].key_len;
1229
1230 /*
1231 * If ciphers are not set (e.g. when going through
1232 * iwconfig), we have to set them appropriately here.
1233 */
1234 if (connect->crypto.cipher_group == 0)
1235 connect->crypto.cipher_group = cipher;
1236
1237 if (connect->crypto.n_ciphers_pairwise == 0) {
1238 connect->crypto.n_ciphers_pairwise = 1;
1239 connect->crypto.ciphers_pairwise[0] = cipher;
1240 }
1241 }
1242
1243 connect->crypto.wep_keys = connkeys->params;
1244 connect->crypto.wep_tx_key = connkeys->def;
1245 } else {
1246 if (WARN_ON(connkeys))
1247 return -EINVAL;
1248 }
1249
1250 wdev->connect_keys = connkeys;
1251 memcpy(wdev->ssid, connect->ssid, connect->ssid_len);
1252 wdev->ssid_len = connect->ssid_len;
1253
1254 wdev->conn_bss_type = connect->pbss ? IEEE80211_BSS_TYPE_PBSS :
1255 IEEE80211_BSS_TYPE_ESS;
1256
1257 if (!rdev->ops->connect)
1258 err = cfg80211_sme_connect(wdev, connect, prev_bssid);
1259 else
1260 err = rdev_connect(rdev, dev, connect);
1261
1262 if (err) {
1263 wdev->connect_keys = NULL;
1264 /*
1265 * This could be reassoc getting refused, don't clear
1266 * ssid_len in that case.
1267 */
1268 if (!wdev->current_bss)
1269 wdev->ssid_len = 0;
1270 return err;
1271 }
1272
1273 return 0;
1274 }
1275
cfg80211_disconnect(struct cfg80211_registered_device * rdev,struct net_device * dev,u16 reason,bool wextev)1276 int cfg80211_disconnect(struct cfg80211_registered_device *rdev,
1277 struct net_device *dev, u16 reason, bool wextev)
1278 {
1279 struct wireless_dev *wdev = dev->ieee80211_ptr;
1280 int err = 0;
1281
1282 ASSERT_WDEV_LOCK(wdev);
1283
1284 kfree_sensitive(wdev->connect_keys);
1285 wdev->connect_keys = NULL;
1286
1287 wdev->conn_owner_nlportid = 0;
1288
1289 if (wdev->conn)
1290 err = cfg80211_sme_disconnect(wdev, reason);
1291 else if (!rdev->ops->disconnect)
1292 cfg80211_mlme_down(rdev, dev);
1293 else if (wdev->ssid_len)
1294 err = rdev_disconnect(rdev, dev, reason);
1295
1296 /*
1297 * Clear ssid_len unless we actually were fully connected,
1298 * in which case cfg80211_disconnected() will take care of
1299 * this later.
1300 */
1301 if (!wdev->current_bss)
1302 wdev->ssid_len = 0;
1303
1304 return err;
1305 }
1306
1307 /*
1308 * Used to clean up after the connection / connection attempt owner socket
1309 * disconnects
1310 */
cfg80211_autodisconnect_wk(struct work_struct * work)1311 void cfg80211_autodisconnect_wk(struct work_struct *work)
1312 {
1313 struct wireless_dev *wdev =
1314 container_of(work, struct wireless_dev, disconnect_wk);
1315 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
1316
1317 wdev_lock(wdev);
1318
1319 if (wdev->conn_owner_nlportid) {
1320 switch (wdev->iftype) {
1321 case NL80211_IFTYPE_ADHOC:
1322 __cfg80211_leave_ibss(rdev, wdev->netdev, false);
1323 break;
1324 case NL80211_IFTYPE_AP:
1325 case NL80211_IFTYPE_P2P_GO:
1326 __cfg80211_stop_ap(rdev, wdev->netdev, false);
1327 break;
1328 case NL80211_IFTYPE_MESH_POINT:
1329 __cfg80211_leave_mesh(rdev, wdev->netdev);
1330 break;
1331 case NL80211_IFTYPE_STATION:
1332 case NL80211_IFTYPE_P2P_CLIENT:
1333 /*
1334 * Use disconnect_bssid if still connecting and
1335 * ops->disconnect not implemented. Otherwise we can
1336 * use cfg80211_disconnect.
1337 */
1338 if (rdev->ops->disconnect || wdev->current_bss)
1339 cfg80211_disconnect(rdev, wdev->netdev,
1340 WLAN_REASON_DEAUTH_LEAVING,
1341 true);
1342 else
1343 cfg80211_mlme_deauth(rdev, wdev->netdev,
1344 wdev->disconnect_bssid,
1345 NULL, 0,
1346 WLAN_REASON_DEAUTH_LEAVING,
1347 false);
1348 break;
1349 default:
1350 break;
1351 }
1352 }
1353
1354 wdev_unlock(wdev);
1355 }
1356
