1 // SPDX-License-Identifier: GPL-2.0
2 /*
3 * SME code for cfg80211
4 * both driver SME event handling and the SME implementation
5 * (for nl80211's connect() and wext)
6 *
7 * Copyright 2009 Johannes Berg <johannes@sipsolutions.net>
8 * Copyright (C) 2009, 2020, 2022 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_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
cfg80211_conn_do_work(struct wireless_dev * wdev,enum nl80211_timeout_reason * treason)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_auth_request auth_req = {};
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 auth_req.key = params->key;
172 auth_req.key_len = params->key_len;
173 auth_req.key_idx = params->key_idx;
174 auth_req.auth_type = params->auth_type;
175 auth_req.bss = cfg80211_get_bss(&rdev->wiphy, params->channel,
176 params->bssid,
177 params->ssid, params->ssid_len,
178 IEEE80211_BSS_TYPE_ESS,
179 IEEE80211_PRIVACY_ANY);
180 auth_req.link_id = -1;
181 err = cfg80211_mlme_auth(rdev, wdev->netdev, &auth_req);
182 cfg80211_put_bss(&rdev->wiphy, auth_req.bss);
183 return err;
184 case CFG80211_CONN_AUTH_FAILED_TIMEOUT:
185 *treason = NL80211_TIMEOUT_AUTH;
186 return -ENOTCONN;
187 case CFG80211_CONN_ASSOCIATE_NEXT:
188 if (WARN_ON(!rdev->ops->assoc))
189 return -EOPNOTSUPP;
190 wdev->conn->state = CFG80211_CONN_ASSOCIATING;
191 if (wdev->conn->prev_bssid_valid)
192 req.prev_bssid = wdev->conn->prev_bssid;
193 req.ie = params->ie;
194 req.ie_len = params->ie_len;
195 req.use_mfp = params->mfp != NL80211_MFP_NO;
196 req.crypto = params->crypto;
197 req.flags = params->flags;
198 req.ht_capa = params->ht_capa;
199 req.ht_capa_mask = params->ht_capa_mask;
200 req.vht_capa = params->vht_capa;
201 req.vht_capa_mask = params->vht_capa_mask;
202 req.link_id = -1;
203
204 req.bss = cfg80211_get_bss(&rdev->wiphy, params->channel,
205 params->bssid,
206 params->ssid, params->ssid_len,
207 IEEE80211_BSS_TYPE_ESS,
208 IEEE80211_PRIVACY_ANY);
209 if (!req.bss) {
210 err = -ENOENT;
211 } else {
212 err = cfg80211_mlme_assoc(rdev, wdev->netdev, &req);
213 cfg80211_put_bss(&rdev->wiphy, req.bss);
214 }
215
216 if (err)
217 cfg80211_mlme_deauth(rdev, wdev->netdev, params->bssid,
218 NULL, 0,
219 WLAN_REASON_DEAUTH_LEAVING,
220 false);
221 return err;
222 case CFG80211_CONN_ASSOC_FAILED_TIMEOUT:
223 *treason = NL80211_TIMEOUT_ASSOC;
224 fallthrough;
225 case CFG80211_CONN_ASSOC_FAILED:
226 cfg80211_mlme_deauth(rdev, wdev->netdev, params->bssid,
227 NULL, 0,
228 WLAN_REASON_DEAUTH_LEAVING, false);
229 return -ENOTCONN;
230 case CFG80211_CONN_DEAUTH:
231 cfg80211_mlme_deauth(rdev, wdev->netdev, params->bssid,
232 NULL, 0,
233 WLAN_REASON_DEAUTH_LEAVING, false);
234 fallthrough;
235 case CFG80211_CONN_ABANDON:
236 /* free directly, disconnected event already sent */
237 cfg80211_sme_free(wdev);
238 return 0;
239 default:
240 return 0;
241 }
242 }
243
cfg80211_conn_work(struct work_struct * work)244 void cfg80211_conn_work(struct work_struct *work)
245 {
246 struct cfg80211_registered_device *rdev =
247 container_of(work, struct cfg80211_registered_device, conn_work);
248 struct wireless_dev *wdev;
249 u8 bssid_buf[ETH_ALEN], *bssid = NULL;
250 enum nl80211_timeout_reason treason;
251
252 wiphy_lock(&rdev->wiphy);
253
254 list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) {
255 if (!wdev->netdev)
256 continue;
257
258 wdev_lock(wdev);
259 if (!netif_running(wdev->netdev)) {
260 wdev_unlock(wdev);
261 continue;
262 }
263 if (!wdev->conn ||
264 wdev->conn->state == CFG80211_CONN_CONNECTED) {
265 wdev_unlock(wdev);
266 continue;
267 }
268 if (wdev->conn->params.bssid) {
269 memcpy(bssid_buf, wdev->conn->params.bssid, ETH_ALEN);
270 bssid = bssid_buf;
271 }
272 treason = NL80211_TIMEOUT_UNSPECIFIED;
273 if (cfg80211_conn_do_work(wdev, &treason)) {
274 struct cfg80211_connect_resp_params cr;
275
276 memset(&cr, 0, sizeof(cr));
277 cr.status = -1;
278 cr.links[0].bssid = bssid;
279 cr.timeout_reason = treason;
280 __cfg80211_connect_result(wdev->netdev, &cr, false);
281 }
282 wdev_unlock(wdev);
283 }
284
285 wiphy_unlock(&rdev->wiphy);
286 }
287
288 /* Returned bss is reference counted and must be cleaned up appropriately. */
cfg80211_get_conn_bss(struct wireless_dev * wdev)289 static struct cfg80211_bss *cfg80211_get_conn_bss(struct wireless_dev *wdev)
290 {
291 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
292 struct cfg80211_bss *bss;
293
294 ASSERT_WDEV_LOCK(wdev);
295
296 bss = cfg80211_get_bss(wdev->wiphy, wdev->conn->params.channel,
297 wdev->conn->params.bssid,
298 wdev->conn->params.ssid,
299 wdev->conn->params.ssid_len,
300 wdev->conn_bss_type,
301 IEEE80211_PRIVACY(wdev->conn->params.privacy));
302 if (!bss)
303 return NULL;
304
305 memcpy(wdev->conn->bssid, bss->bssid, ETH_ALEN);
306 wdev->conn->params.bssid = wdev->conn->bssid;
307 wdev->conn->params.channel = bss->channel;
308 wdev->conn->state = CFG80211_CONN_AUTHENTICATE_NEXT;
309 schedule_work(&rdev->conn_work);
310
311 return bss;
312 }
313
__cfg80211_sme_scan_done(struct net_device * dev)314 static void __cfg80211_sme_scan_done(struct net_device *dev)
315 {
316 struct wireless_dev *wdev = dev->ieee80211_ptr;
317 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
318 struct cfg80211_bss *bss;
319
320 ASSERT_WDEV_LOCK(wdev);
321
322 if (!wdev->conn)
323 return;
324
325 if (wdev->conn->state != CFG80211_CONN_SCANNING &&
326 wdev->conn->state != CFG80211_CONN_SCAN_AGAIN)
327 return;
328
329 bss = cfg80211_get_conn_bss(wdev);
330 if (bss)
331 cfg80211_put_bss(&rdev->wiphy, bss);
332 else
333 schedule_work(&rdev->conn_work);
334 }
335
cfg80211_sme_scan_done(struct net_device * dev)336 void cfg80211_sme_scan_done(struct net_device *dev)
337 {
338 struct wireless_dev *wdev = dev->ieee80211_ptr;
339
340 wdev_lock(wdev);
341 __cfg80211_sme_scan_done(dev);
342 wdev_unlock(wdev);
343 }
344
cfg80211_sme_rx_auth(struct wireless_dev * wdev,const u8 * buf,size_t len)345 void cfg80211_sme_rx_auth(struct wireless_dev *wdev, const u8 *buf, size_t len)
346 {
347 struct wiphy *wiphy = wdev->wiphy;
348 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
349 struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)buf;
350 u16 status_code = le16_to_cpu(mgmt->u.auth.status_code);
351
352 ASSERT_WDEV_LOCK(wdev);
353
354 if (!wdev->conn || wdev->conn->state == CFG80211_CONN_CONNECTED)
355 return;
356
357 if (status_code == WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG &&
358 wdev->conn->auto_auth &&
359 wdev->conn->params.auth_type != NL80211_AUTHTYPE_NETWORK_EAP) {
360 /* select automatically between only open, shared, leap */
361 switch (wdev->conn->params.auth_type) {
362 case NL80211_AUTHTYPE_OPEN_SYSTEM:
363 if (wdev->connect_keys)
364 wdev->conn->params.auth_type =
365 NL80211_AUTHTYPE_SHARED_KEY;
366 else
367 wdev->conn->params.auth_type =
368 NL80211_AUTHTYPE_NETWORK_EAP;
369 break;
370 case NL80211_AUTHTYPE_SHARED_KEY:
371 wdev->conn->params.auth_type =
372 NL80211_AUTHTYPE_NETWORK_EAP;
373 break;
374 default:
375 /* huh? */
376 wdev->conn->params.auth_type =
377 NL80211_AUTHTYPE_OPEN_SYSTEM;
378 break;
379 }
380 wdev->conn->state = CFG80211_CONN_AUTHENTICATE_NEXT;
381 schedule_work(&rdev->conn_work);
382 } else if (status_code != WLAN_STATUS_SUCCESS) {
383 struct cfg80211_connect_resp_params cr;
384
385 memset(&cr, 0, sizeof(cr));
386 cr.status = status_code;
387 cr.links[0].bssid = mgmt->bssid;
388 cr.timeout_reason = NL80211_TIMEOUT_UNSPECIFIED;
389 __cfg80211_connect_result(wdev->netdev, &cr, false);
390 } else if (wdev->conn->state == CFG80211_CONN_AUTHENTICATING) {
391 wdev->conn->state = CFG80211_CONN_ASSOCIATE_NEXT;
392 schedule_work(&rdev->conn_work);
393 }
394 }
395
cfg80211_sme_rx_assoc_resp(struct wireless_dev * wdev,u16 status)396 bool cfg80211_sme_rx_assoc_resp(struct wireless_dev *wdev, u16 status)
397 {
398 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
399
400 if (!wdev->conn)
401 return false;
402
403 if (status == WLAN_STATUS_SUCCESS) {
404 wdev->conn->state = CFG80211_CONN_CONNECTED;
405 return false;
406 }
407
408 if (wdev->conn->prev_bssid_valid) {
409 /*
410 * Some stupid APs don't accept reassoc, so we
411 * need to fall back to trying regular assoc;
412 * return true so no event is sent to userspace.
413 */
414 wdev->conn->prev_bssid_valid = false;
415 wdev->conn->state = CFG80211_CONN_ASSOCIATE_NEXT;
416 schedule_work(&rdev->conn_work);
417 return true;
418 }
419
420 wdev->conn->state = CFG80211_CONN_ASSOC_FAILED;
421 schedule_work(&rdev->conn_work);
422 return false;
423 }
424
cfg80211_sme_deauth(struct wireless_dev * wdev)425 void cfg80211_sme_deauth(struct wireless_dev *wdev)
426 {
427 cfg80211_sme_free(wdev);
428 }
429
cfg80211_sme_auth_timeout(struct wireless_dev * wdev)430 void cfg80211_sme_auth_timeout(struct wireless_dev *wdev)
431 {
432 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
433
434 if (!wdev->conn)
435 return;
436
437 wdev->conn->state = CFG80211_CONN_AUTH_FAILED_TIMEOUT;
438 schedule_work(&rdev->conn_work);
439 }
440
cfg80211_sme_disassoc(struct wireless_dev * wdev)441 void cfg80211_sme_disassoc(struct wireless_dev *wdev)
442 {
443 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
444
445 if (!wdev->conn)
446 return;
447
448 wdev->conn->state = CFG80211_CONN_DEAUTH;
449 schedule_work(&rdev->conn_work);
450 }
451
cfg80211_sme_assoc_timeout(struct wireless_dev * wdev)452 void cfg80211_sme_assoc_timeout(struct wireless_dev *wdev)
453 {
454 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
455
456 if (!wdev->conn)
457 return;
458
459 wdev->conn->state = CFG80211_CONN_ASSOC_FAILED_TIMEOUT;
460 schedule_work(&rdev->conn_work);
461 }
462
cfg80211_sme_abandon_assoc(struct wireless_dev * wdev)463 void cfg80211_sme_abandon_assoc(struct wireless_dev *wdev)
464 {
465 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
466
467 if (!wdev->conn)
468 return;
469
470 wdev->conn->state = CFG80211_CONN_ABANDON;
471 schedule_work(&rdev->conn_work);
472 }
473
cfg80211_wdev_release_bsses(struct wireless_dev * wdev)474 static void cfg80211_wdev_release_bsses(struct wireless_dev *wdev)
475 {
476 unsigned int link;
477
478 for_each_valid_link(wdev, link) {
479 if (!wdev->links[link].client.current_bss)
480 continue;
481 cfg80211_unhold_bss(wdev->links[link].client.current_bss);
482 cfg80211_put_bss(wdev->wiphy,
483 &wdev->links[link].client.current_bss->pub);
484 wdev->links[link].client.current_bss = NULL;
485 }
486 }
487
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)488 static int cfg80211_sme_get_conn_ies(struct wireless_dev *wdev,
489 const u8 *ies, size_t ies_len,
490 const u8 **out_ies, size_t *out_ies_len)
491 {
492 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
493 u8 *buf;
494 size_t offs;
495
496 if (!rdev->wiphy.extended_capabilities_len ||
497 (ies && cfg80211_find_ie(WLAN_EID_EXT_CAPABILITY, ies, ies_len))) {
498 *out_ies = kmemdup(ies, ies_len, GFP_KERNEL);
499 if (!*out_ies)
500 return -ENOMEM;
501 *out_ies_len = ies_len;
502 return 0;
503 }
504
505 buf = kmalloc(ies_len + rdev->wiphy.extended_capabilities_len + 2,
506 GFP_KERNEL);
507 if (!buf)
508 return -ENOMEM;
509
510 if (ies_len) {
511 static const u8 before_extcapa[] = {
512 /* not listing IEs expected to be created by driver */
513 WLAN_EID_RSN,
514 WLAN_EID_QOS_CAPA,
515 WLAN_EID_RRM_ENABLED_CAPABILITIES,
516 WLAN_EID_MOBILITY_DOMAIN,
517 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
518 WLAN_EID_BSS_COEX_2040,
519 };
520
521 offs = ieee80211_ie_split(ies, ies_len, before_extcapa,
522 ARRAY_SIZE(before_extcapa), 0);
523 memcpy(buf, ies, offs);
524 /* leave a whole for extended capabilities IE */
525 memcpy(buf + offs + rdev->wiphy.extended_capabilities_len + 2,
526 ies + offs, ies_len - offs);
527 } else {
528 offs = 0;
529 }
530
531 /* place extended capabilities IE (with only driver capabilities) */
532 buf[offs] = WLAN_EID_EXT_CAPABILITY;
533 buf[offs + 1] = rdev->wiphy.extended_capabilities_len;
534 memcpy(buf + offs + 2,
535 rdev->wiphy.extended_capabilities,
536 rdev->wiphy.extended_capabilities_len);
537
538 *out_ies = buf;
539 *out_ies_len = ies_len + rdev->wiphy.extended_capabilities_len + 2;
540
541 return 0;
542 }
543
cfg80211_sme_connect(struct wireless_dev * wdev,struct cfg80211_connect_params * connect,const u8 * prev_bssid)544 static int cfg80211_sme_connect(struct wireless_dev *wdev,
545 struct cfg80211_connect_params *connect,
546 const u8 *prev_bssid)
547 {
548 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
549 struct cfg80211_bss *bss;
550 int err;
551
552 if (!rdev->ops->auth || !rdev->ops->assoc)
553 return -EOPNOTSUPP;
554
555 cfg80211_wdev_release_bsses(wdev);
556
557 if (wdev->connected) {
558 cfg80211_sme_free(wdev);
559 wdev->connected = false;
560 }
561
562 if (wdev->conn)
563 return -EINPROGRESS;
564
565 wdev->conn = kzalloc(sizeof(*wdev->conn), GFP_KERNEL);
566 if (!wdev->conn)
567 return -ENOMEM;
568
569 /*
570 * Copy all parameters, and treat explicitly IEs, BSSID, SSID.
571 */
572 memcpy(&wdev->conn->params, connect, sizeof(*connect));
573 if (connect->bssid) {
574 wdev->conn->params.bssid = wdev->conn->bssid;
575 memcpy(wdev->conn->bssid, connect->bssid, ETH_ALEN);
576 }
577
578 if (cfg80211_sme_get_conn_ies(wdev, connect->ie, connect->ie_len,
579 &wdev->conn->ie,
580 &wdev->conn->params.ie_len)) {
581 kfree(wdev->conn);
582 wdev->conn = NULL;
583 return -ENOMEM;
584 }
585 wdev->conn->params.ie = wdev->conn->ie;
586
587 if (connect->auth_type == NL80211_AUTHTYPE_AUTOMATIC) {
588 wdev->conn->auto_auth = true;
589 /* start with open system ... should mostly work */
590 wdev->conn->params.auth_type =
591 NL80211_AUTHTYPE_OPEN_SYSTEM;
592 } else {
593 wdev->conn->auto_auth = false;
594 }
595
596 wdev->conn->params.ssid = wdev->u.client.ssid;
597 wdev->conn->params.ssid_len = wdev->u.client.ssid_len;
598
599 /* see if we have the bss already */
600 bss = cfg80211_get_conn_bss(wdev);
601
602 if (prev_bssid) {
603 memcpy(wdev->conn->prev_bssid, prev_bssid, ETH_ALEN);
604 wdev->conn->prev_bssid_valid = true;
605 }
606
607 /* we're good if we have a matching bss struct */
608 if (bss) {
609 enum nl80211_timeout_reason treason;
610
611 err = cfg80211_conn_do_work(wdev, &treason);
612 cfg80211_put_bss(wdev->wiphy, bss);
613 } else {
614 /* otherwise we'll need to scan for the AP first */
615 err = cfg80211_conn_scan(wdev);
616
617 /*
618 * If we can't scan right now, then we need to scan again
619 * after the current scan finished, since the parameters
620 * changed (unless we find a good AP anyway).
621 */
622 if (err == -EBUSY) {
623 err = 0;
624 wdev->conn->state = CFG80211_CONN_SCAN_AGAIN;
625 }
626 }
627
628 if (err)
629 cfg80211_sme_free(wdev);
630
631 return err;
632 }
633
cfg80211_sme_disconnect(struct wireless_dev * wdev,u16 reason)634 static int cfg80211_sme_disconnect(struct wireless_dev *wdev, u16 reason)
635 {
636 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
637 int err;
638
639 if (!wdev->conn)
640 return 0;
641
642 if (!rdev->ops->deauth)
643 return -EOPNOTSUPP;
644
645 if (wdev->conn->state == CFG80211_CONN_SCANNING ||
646 wdev->conn->state == CFG80211_CONN_SCAN_AGAIN) {
647 err = 0;
648 goto out;
649 }
650
651 /* wdev->conn->params.bssid must be set if > SCANNING */
652 err = cfg80211_mlme_deauth(rdev, wdev->netdev,
653 wdev->conn->params.bssid,
654 NULL, 0, reason, false);
655 out:
656 cfg80211_sme_free(wdev);
657 return err;
658 }
659
660 /*
661 * code shared for in-device and software SME
662 */
663
cfg80211_is_all_idle(void)664 static bool cfg80211_is_all_idle(void)
665 {
666 struct cfg80211_registered_device *rdev;
667 struct wireless_dev *wdev;
668 bool is_all_idle = true;
669
670 /*
671 * All devices must be idle as otherwise if you are actively
672 * scanning some new beacon hints could be learned and would
673 * count as new regulatory hints.
674 * Also if there is any other active beaconing interface we
675 * need not issue a disconnect hint and reset any info such
676 * as chan dfs state, etc.
677 */
678 list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
679 list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) {
680 wdev_lock(wdev);
681 if (wdev->conn || wdev->connected ||
682 cfg80211_beaconing_iface_active(wdev))
683 is_all_idle = false;
684 wdev_unlock(wdev);
685 }
686 }
687
688 return is_all_idle;
689 }
690
disconnect_work(struct work_struct * work)691 static void disconnect_work(struct work_struct *work)
692 {
693 rtnl_lock();
694 if (cfg80211_is_all_idle())
695 regulatory_hint_disconnect();
696 rtnl_unlock();
697 }
698
699 DECLARE_WORK(cfg80211_disconnect_work, disconnect_work);
700
701 static void
cfg80211_connect_result_release_bsses(struct wireless_dev * wdev,struct cfg80211_connect_resp_params * cr)702 cfg80211_connect_result_release_bsses(struct wireless_dev *wdev,
703 struct cfg80211_connect_resp_params *cr)
704 {
705 unsigned int link;
706
707 for_each_valid_link(cr, link) {
708 if (!cr->links[link].bss)
709 continue;
710 cfg80211_unhold_bss(bss_from_pub(cr->links[link].bss));
711 cfg80211_put_bss(wdev->wiphy, cr->links[link].bss);
712 }
713 }
714
715 /*
716 * API calls for drivers implementing connect/disconnect and
717 * SME event handling
718 */
719
720 /* This method must consume bss one way or another */
__cfg80211_connect_result(struct net_device * dev,struct cfg80211_connect_resp_params * cr,bool wextev)721 void __cfg80211_connect_result(struct net_device *dev,
722 struct cfg80211_connect_resp_params *cr,
723 bool wextev)
724 {
725 struct wireless_dev *wdev = dev->ieee80211_ptr;
726 const struct element *country_elem = NULL;
727 const u8 *country_data;
728 u8 country_datalen;
729 #ifdef CONFIG_CFG80211_WEXT
730 union iwreq_data wrqu;
731 #endif
732 unsigned int link;
733 const u8 *connected_addr;
734 bool bss_not_found = false;
735
736 ASSERT_WDEV_LOCK(wdev);
737
738 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION &&
739 wdev->iftype != NL80211_IFTYPE_P2P_CLIENT))
740 goto out;
741
742 if (cr->valid_links) {
743 if (WARN_ON(!cr->ap_mld_addr))
744 goto out;
745
746 for_each_valid_link(cr, link) {
747 if (WARN_ON(!cr->links[link].addr))
748 goto out;
749 }
750
751 if (WARN_ON(wdev->connect_keys))
752 goto out;
753 }
754
755 wdev->unprot_beacon_reported = 0;
756 nl80211_send_connect_result(wiphy_to_rdev(wdev->wiphy), dev, cr,
757 GFP_KERNEL);
758 connected_addr = cr->valid_links ? cr->ap_mld_addr : cr->links[0].bssid;
759
760 #ifdef CONFIG_CFG80211_WEXT
761 if (wextev && !cr->valid_links) {
762 if (cr->req_ie && cr->status == WLAN_STATUS_SUCCESS) {
763 memset(&wrqu, 0, sizeof(wrqu));
764 wrqu.data.length = cr->req_ie_len;
765 wireless_send_event(dev, IWEVASSOCREQIE, &wrqu,
766 cr->req_ie);
767 }
768
769 if (cr->resp_ie && cr->status == WLAN_STATUS_SUCCESS) {
770 memset(&wrqu, 0, sizeof(wrqu));
771 wrqu.data.length = cr->resp_ie_len;
772 wireless_send_event(dev, IWEVASSOCRESPIE, &wrqu,
773 cr->resp_ie);
774 }
775
776 memset(&wrqu, 0, sizeof(wrqu));
777 wrqu.ap_addr.sa_family = ARPHRD_ETHER;
778 if (connected_addr && cr->status == WLAN_STATUS_SUCCESS) {
779 memcpy(wrqu.ap_addr.sa_data, connected_addr, ETH_ALEN);
780 memcpy(wdev->wext.prev_bssid, connected_addr, ETH_ALEN);
781 wdev->wext.prev_bssid_valid = true;
782 }
783 wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL);
784 }
785 #endif
786
787 if (cr->status == WLAN_STATUS_SUCCESS) {
788 if (!wiphy_to_rdev(wdev->wiphy)->ops->connect) {
789 for_each_valid_link(cr, link) {
790 if (WARN_ON_ONCE(!cr->links[link].bss))
791 break;
792 }
793 }
794
795 for_each_valid_link(cr, link) {
796 if (cr->links[link].bss)
797 continue;
798
799 cr->links[link].bss =
800 cfg80211_get_bss(wdev->wiphy, NULL,
801 cr->links[link].bssid,
802 wdev->u.client.ssid,
803 wdev->u.client.ssid_len,
804 wdev->conn_bss_type,
805 IEEE80211_PRIVACY_ANY);
806 if (!cr->links[link].bss) {
807 bss_not_found = true;
808 break;
809 }
810 cfg80211_hold_bss(bss_from_pub(cr->links[link].bss));
811 }
812 }
813
814 cfg80211_wdev_release_bsses(wdev);
815
816 if (cr->status != WLAN_STATUS_SUCCESS) {
817 kfree_sensitive(wdev->connect_keys);
818 wdev->connect_keys = NULL;
819 wdev->u.client.ssid_len = 0;
820 wdev->conn_owner_nlportid = 0;
821 cfg80211_connect_result_release_bsses(wdev, cr);
822 cfg80211_sme_free(wdev);
823 return;
824 }
825
826 if (WARN_ON(bss_not_found)) {
827 cfg80211_connect_result_release_bsses(wdev, cr);
828 return;
829 }
830
831 memset(wdev->links, 0, sizeof(wdev->links));
832 wdev->valid_links = cr->valid_links;
833 for_each_valid_link(cr, link)
834 wdev->links[link].client.current_bss =
835 bss_from_pub(cr->links[link].bss);
836 wdev->connected = true;
837 ether_addr_copy(wdev->u.client.connected_addr, connected_addr);
838 if (cr->valid_links) {
839 for_each_valid_link(cr, link)
840 memcpy(wdev->links[link].addr, cr->links[link].addr,
841 ETH_ALEN);
842 }
843
844 if (!(wdev->wiphy->flags & WIPHY_FLAG_HAS_STATIC_WEP))
845 cfg80211_upload_connect_keys(wdev);
846
847 rcu_read_lock();
848 for_each_valid_link(cr, link) {
849 country_elem =
850 ieee80211_bss_get_elem(cr->links[link].bss,
851 WLAN_EID_COUNTRY);
852 if (country_elem)
853 break;
854 }
855 if (!country_elem) {
856 rcu_read_unlock();
857 return;
858 }
859
860 country_datalen = country_elem->datalen;
861 country_data = kmemdup(country_elem->data, country_datalen, GFP_ATOMIC);
862 rcu_read_unlock();
863
864 if (!country_data)
865 return;
866
867 regulatory_hint_country_ie(wdev->wiphy,
868 cr->links[link].bss->channel->band,
869 country_data, country_datalen);
870 kfree(country_data);
871
872 return;
873 out:
874 for_each_valid_link(cr, link)
875 cfg80211_put_bss(wdev->wiphy, cr->links[link].bss);
876 }
877
cfg80211_update_link_bss(struct wireless_dev * wdev,struct cfg80211_bss ** bss)878 static void cfg80211_update_link_bss(struct wireless_dev *wdev,
879 struct cfg80211_bss **bss)
880 {
881 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
882 struct cfg80211_internal_bss *ibss;
883
884 if (!*bss)
885 return;
886
887 ibss = bss_from_pub(*bss);
888 if (list_empty(&ibss->list)) {
889 struct cfg80211_bss *found = NULL, *tmp = *bss;
890
891 found = cfg80211_get_bss(wdev->wiphy, NULL,
892 (*bss)->bssid,
893 wdev->u.client.ssid,
894 wdev->u.client.ssid_len,
895 wdev->conn_bss_type,
896 IEEE80211_PRIVACY_ANY);
897 if (found) {
898 /* The same BSS is already updated so use it
899 * instead, as it has latest info.
900 */
901 *bss = found;
902 } else {
903 /* Update with BSS provided by driver, it will
904 * be freshly added and ref cnted, we can free
905 * the old one.
906 *
907 * signal_valid can be false, as we are not
908 * expecting the BSS to be found.
909 *
910 * keep the old timestamp to avoid confusion
911 */
912 cfg80211_bss_update(rdev, ibss, false,
913 ibss->ts);
914 }
915
916 cfg80211_put_bss(wdev->wiphy, tmp);
917 }
918 }
919
920 /* Consumes bss object(s) one way or another */
cfg80211_connect_done(struct net_device * dev,struct cfg80211_connect_resp_params * params,gfp_t gfp)921 void cfg80211_connect_done(struct net_device *dev,
922 struct cfg80211_connect_resp_params *params,
923 gfp_t gfp)
924 {
925 struct wireless_dev *wdev = dev->ieee80211_ptr;
926 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
927 struct cfg80211_event *ev;
928 unsigned long flags;
929 u8 *next;
930 size_t link_info_size = 0;
931 unsigned int link;
932
933 for_each_valid_link(params, link) {
934 cfg80211_update_link_bss(wdev, ¶ms->links[link].bss);
935 link_info_size += params->links[link].bssid ? ETH_ALEN : 0;
936 link_info_size += params->links[link].addr ? ETH_ALEN : 0;
937 }
938
939 ev = kzalloc(sizeof(*ev) + (params->ap_mld_addr ? ETH_ALEN : 0) +
940 params->req_ie_len + params->resp_ie_len +
941 params->fils.kek_len + params->fils.pmk_len +
942 (params->fils.pmkid ? WLAN_PMKID_LEN : 0) + link_info_size,
943 gfp);
944
945 if (!ev) {
946 for_each_valid_link(params, link)
947 cfg80211_put_bss(wdev->wiphy,
948 params->links[link].bss);
949 return;
950 }
951
952 ev->type = EVENT_CONNECT_RESULT;
953 next = ((u8 *)ev) + sizeof(*ev);
954 if (params->ap_mld_addr) {
955 ev->cr.ap_mld_addr = next;
956 memcpy((void *)ev->cr.ap_mld_addr, params->ap_mld_addr,
957 ETH_ALEN);
958 next += ETH_ALEN;
959 }
960 if (params->req_ie_len) {
961 ev->cr.req_ie = next;
962 ev->cr.req_ie_len = params->req_ie_len;
963 memcpy((void *)ev->cr.req_ie, params->req_ie,
964 params->req_ie_len);
965 next += params->req_ie_len;
966 }
967 if (params->resp_ie_len) {
968 ev->cr.resp_ie = next;
969 ev->cr.resp_ie_len = params->resp_ie_len;
970 memcpy((void *)ev->cr.resp_ie, params->resp_ie,
971 params->resp_ie_len);
972 next += params->resp_ie_len;
973 }
974 if (params->fils.kek_len) {
975 ev->cr.fils.kek = next;
976 ev->cr.fils.kek_len = params->fils.kek_len;
977 memcpy((void *)ev->cr.fils.kek, params->fils.kek,
978 params->fils.kek_len);
979 next += params->fils.kek_len;
980 }
981 if (params->fils.pmk_len) {
982 ev->cr.fils.pmk = next;
983 ev->cr.fils.pmk_len = params->fils.pmk_len;
984 memcpy((void *)ev->cr.fils.pmk, params->fils.pmk,
985 params->fils.pmk_len);
986 next += params->fils.pmk_len;
987 }
988 if (params->fils.pmkid) {
989 ev->cr.fils.pmkid = next;
990 memcpy((void *)ev->cr.fils.pmkid, params->fils.pmkid,
991 WLAN_PMKID_LEN);
992 next += WLAN_PMKID_LEN;
993 }
994 ev->cr.fils.update_erp_next_seq_num = params->fils.update_erp_next_seq_num;
995 if (params->fils.update_erp_next_seq_num)
996 ev->cr.fils.erp_next_seq_num = params->fils.erp_next_seq_num;
997 ev->cr.valid_links = params->valid_links;
998 for_each_valid_link(params, link) {
999 if (params->links[link].bss)
1000 cfg80211_hold_bss(
1001 bss_from_pub(params->links[link].bss));
1002 ev->cr.links[link].bss = params->links[link].bss;
1003
1004 if (params->links[link].addr) {
1005 ev->cr.links[link].addr = next;
1006 memcpy((void *)ev->cr.links[link].addr,
1007 params->links[link].addr,
1008 ETH_ALEN);
1009 next += ETH_ALEN;
1010 }
1011 if (params->links[link].bssid) {
1012 ev->cr.links[link].bssid = next;
1013 memcpy((void *)ev->cr.links[link].bssid,
1014 params->links[link].bssid,
1015 ETH_ALEN);
1016 next += ETH_ALEN;
1017 }
1018 }
1019 ev->cr.status = params->status;
1020 ev->cr.timeout_reason = params->timeout_reason;
1021
1022 spin_lock_irqsave(&wdev->event_lock, flags);
1023 list_add_tail(&ev->list, &wdev->event_list);
1024 spin_unlock_irqrestore(&wdev->event_lock, flags);
1025 queue_work(cfg80211_wq, &rdev->event_work);
1026 }
1027 EXPORT_SYMBOL(cfg80211_connect_done);
1028
1029 /* Consumes bss object one way or another */
__cfg80211_roamed(struct wireless_dev * wdev,struct cfg80211_roam_info * info)1030 void __cfg80211_roamed(struct wireless_dev *wdev,
1031 struct cfg80211_roam_info *info)
1032 {
1033 #ifdef CONFIG_CFG80211_WEXT
1034 union iwreq_data wrqu;
1035 #endif
1036 unsigned int link;
1037 const u8 *connected_addr;
1038
1039 ASSERT_WDEV_LOCK(wdev);
1040
1041 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION &&
1042 wdev->iftype != NL80211_IFTYPE_P2P_CLIENT))
1043 goto out;
1044
1045 if (WARN_ON(!wdev->connected))
1046 goto out;
1047
1048 if (info->valid_links) {
1049 if (WARN_ON(!info->ap_mld_addr))
1050 goto out;
1051
1052 for_each_valid_link(info, link) {
1053 if (WARN_ON(!info->links[link].addr))
1054 goto out;
1055 }
1056 }
1057
1058 cfg80211_wdev_release_bsses(wdev);
1059
1060 for_each_valid_link(info, link) {
1061 if (WARN_ON(!info->links[link].bss))
1062 goto out;
1063 }
1064
1065 memset(wdev->links, 0, sizeof(wdev->links));
1066 wdev->valid_links = info->valid_links;
1067 for_each_valid_link(info, link) {
1068 cfg80211_hold_bss(bss_from_pub(info->links[link].bss));
1069 wdev->links[link].client.current_bss =
1070 bss_from_pub(info->links[link].bss);
1071 }
1072
1073 connected_addr = info->valid_links ?
1074 info->ap_mld_addr :
1075 info->links[0].bss->bssid;
1076 ether_addr_copy(wdev->u.client.connected_addr, connected_addr);
1077 if (info->valid_links) {
1078 for_each_valid_link(info, link)
1079 memcpy(wdev->links[link].addr, info->links[link].addr,
1080 ETH_ALEN);
1081 }
1082 wdev->unprot_beacon_reported = 0;
1083 nl80211_send_roamed(wiphy_to_rdev(wdev->wiphy),
1084 wdev->netdev, info, GFP_KERNEL);
1085
1086 #ifdef CONFIG_CFG80211_WEXT
1087 if (!info->valid_links) {
1088 if (info->req_ie) {
1089 memset(&wrqu, 0, sizeof(wrqu));
1090 wrqu.data.length = info->req_ie_len;
1091 wireless_send_event(wdev->netdev, IWEVASSOCREQIE,
1092 &wrqu, info->req_ie);
1093 }
1094
1095 if (info->resp_ie) {
1096 memset(&wrqu, 0, sizeof(wrqu));
1097 wrqu.data.length = info->resp_ie_len;
1098 wireless_send_event(wdev->netdev, IWEVASSOCRESPIE,
1099 &wrqu, info->resp_ie);
1100 }
1101
1102 memset(&wrqu, 0, sizeof(wrqu));
1103 wrqu.ap_addr.sa_family = ARPHRD_ETHER;
1104 memcpy(wrqu.ap_addr.sa_data, connected_addr, ETH_ALEN);
1105 memcpy(wdev->wext.prev_bssid, connected_addr, ETH_ALEN);
1106 wdev->wext.prev_bssid_valid = true;
1107 wireless_send_event(wdev->netdev, SIOCGIWAP, &wrqu, NULL);
1108 }
1109 #endif
1110
1111 return;
1112 out:
1113 for_each_valid_link(info, link)
1114 cfg80211_put_bss(wdev->wiphy, info->links[link].bss);
1115 }
1116
1117 /* Consumes info->links.bss object(s) one way or another */
cfg80211_roamed(struct net_device * dev,struct cfg80211_roam_info * info,gfp_t gfp)1118 void cfg80211_roamed(struct net_device *dev, struct cfg80211_roam_info *info,
1119 gfp_t gfp)
1120 {
1121 struct wireless_dev *wdev = dev->ieee80211_ptr;
1122 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
1123 struct cfg80211_event *ev;
1124 unsigned long flags;
1125 u8 *next;
1126 unsigned int link;
1127 size_t link_info_size = 0;
1128 bool bss_not_found = false;
1129
1130 for_each_valid_link(info, link) {
1131 link_info_size += info->links[link].addr ? ETH_ALEN : 0;
1132 link_info_size += info->links[link].bssid ? ETH_ALEN : 0;
1133
1134 if (info->links[link].bss)
1135 continue;
1136
1137 info->links[link].bss =
1138 cfg80211_get_bss(wdev->wiphy,
1139 info->links[link].channel,
1140 info->links[link].bssid,
1141 wdev->u.client.ssid,
1142 wdev->u.client.ssid_len,
1143 wdev->conn_bss_type,
1144 IEEE80211_PRIVACY_ANY);
1145
1146 if (!info->links[link].bss) {
1147 bss_not_found = true;
1148 break;
1149 }
1150 }
1151
1152 if (WARN_ON(bss_not_found))
1153 goto out;
1154
1155 ev = kzalloc(sizeof(*ev) + info->req_ie_len + info->resp_ie_len +
1156 info->fils.kek_len + info->fils.pmk_len +
1157 (info->fils.pmkid ? WLAN_PMKID_LEN : 0) +
1158 (info->ap_mld_addr ? ETH_ALEN : 0) + link_info_size, gfp);
1159 if (!ev)
1160 goto out;
1161
1162 ev->type = EVENT_ROAMED;
1163 next = ((u8 *)ev) + sizeof(*ev);
1164 if (info->req_ie_len) {
1165 ev->rm.req_ie = next;
1166 ev->rm.req_ie_len = info->req_ie_len;
1167 memcpy((void *)ev->rm.req_ie, info->req_ie, info->req_ie_len);
1168 next += info->req_ie_len;
1169 }
1170 if (info->resp_ie_len) {
1171 ev->rm.resp_ie = next;
1172 ev->rm.resp_ie_len = info->resp_ie_len;
1173 memcpy((void *)ev->rm.resp_ie, info->resp_ie,
1174 info->resp_ie_len);
1175 next += info->resp_ie_len;
1176 }
1177 if (info->fils.kek_len) {
1178 ev->rm.fils.kek = next;
1179 ev->rm.fils.kek_len = info->fils.kek_len;
1180 memcpy((void *)ev->rm.fils.kek, info->fils.kek,
1181 info->fils.kek_len);
1182 next += info->fils.kek_len;
1183 }
1184 if (info->fils.pmk_len) {
1185 ev->rm.fils.pmk = next;
1186 ev->rm.fils.pmk_len = info->fils.pmk_len;
1187 memcpy((void *)ev->rm.fils.pmk, info->fils.pmk,
1188 info->fils.pmk_len);
1189 next += info->fils.pmk_len;
1190 }
1191 if (info->fils.pmkid) {
1192 ev->rm.fils.pmkid = next;
1193 memcpy((void *)ev->rm.fils.pmkid, info->fils.pmkid,
1194 WLAN_PMKID_LEN);
1195 next += WLAN_PMKID_LEN;
1196 }
1197 ev->rm.fils.update_erp_next_seq_num = info->fils.update_erp_next_seq_num;
1198 if (info->fils.update_erp_next_seq_num)
1199 ev->rm.fils.erp_next_seq_num = info->fils.erp_next_seq_num;
1200 if (info->ap_mld_addr) {
1201 ev->rm.ap_mld_addr = next;
1202 memcpy((void *)ev->rm.ap_mld_addr, info->ap_mld_addr,
1203 ETH_ALEN);
1204 next += ETH_ALEN;
1205 }
1206 ev->rm.valid_links = info->valid_links;
1207 for_each_valid_link(info, link) {
1208 ev->rm.links[link].bss = info->links[link].bss;
1209
1210 if (info->links[link].addr) {
1211 ev->rm.links[link].addr = next;
1212 memcpy((void *)ev->rm.links[link].addr,
1213 info->links[link].addr,
1214 ETH_ALEN);
1215 next += ETH_ALEN;
1216 }
1217
1218 if (info->links[link].bssid) {
1219 ev->rm.links[link].bssid = next;
1220 memcpy((void *)ev->rm.links[link].bssid,
1221 info->links[link].bssid,
1222 ETH_ALEN);
1223 next += ETH_ALEN;
1224 }
1225 }
1226
1227 spin_lock_irqsave(&wdev->event_lock, flags);
1228 list_add_tail(&ev->list, &wdev->event_list);
1229 spin_unlock_irqrestore(&wdev->event_lock, flags);
1230 queue_work(cfg80211_wq, &rdev->event_work);
1231
1232 return;
1233 out:
1234 for_each_valid_link(info, link)
1235 cfg80211_put_bss(wdev->wiphy, info->links[link].bss);
1236
1237 }
1238 EXPORT_SYMBOL(cfg80211_roamed);
1239
__cfg80211_port_authorized(struct wireless_dev * wdev,const u8 * bssid)1240 void __cfg80211_port_authorized(struct wireless_dev *wdev, const u8 *bssid)
1241 {
1242 ASSERT_WDEV_LOCK(wdev);
1243
1244 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION &&
1245 wdev->iftype != NL80211_IFTYPE_P2P_CLIENT))
1246 return;
1247
1248 if (WARN_ON(!wdev->connected) ||
1249 WARN_ON(!ether_addr_equal(wdev->u.client.connected_addr, bssid)))
1250 return;
1251
1252 nl80211_send_port_authorized(wiphy_to_rdev(wdev->wiphy), wdev->netdev,
1253 bssid);
1254 }
1255
cfg80211_port_authorized(struct net_device * dev,const u8 * bssid,gfp_t gfp)1256 void cfg80211_port_authorized(struct net_device *dev, const u8 *bssid,
1257 gfp_t gfp)
1258 {
1259 struct wireless_dev *wdev = dev->ieee80211_ptr;
1260 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
1261 struct cfg80211_event *ev;
1262 unsigned long flags;
1263
1264 if (WARN_ON(!bssid))
1265 return;
1266
1267 ev = kzalloc(sizeof(*ev), gfp);
1268 if (!ev)
1269 return;
1270
1271 ev->type = EVENT_PORT_AUTHORIZED;
1272 memcpy(ev->pa.bssid, bssid, ETH_ALEN);
1273
1274 /*
1275 * Use the wdev event list so that if there are pending
1276 * connected/roamed events, they will be reported first.
1277 */
1278 spin_lock_irqsave(&wdev->event_lock, flags);
1279 list_add_tail(&ev->list, &wdev->event_list);
1280 spin_unlock_irqrestore(&wdev->event_lock, flags);
1281 queue_work(cfg80211_wq, &rdev->event_work);
1282 }
1283 EXPORT_SYMBOL(cfg80211_port_authorized);
1284
__cfg80211_disconnected(struct net_device * dev,const u8 * ie,size_t ie_len,u16 reason,bool from_ap)1285 void __cfg80211_disconnected(struct net_device *dev, const u8 *ie,
1286 size_t ie_len, u16 reason, bool from_ap)
1287 {
1288 struct wireless_dev *wdev = dev->ieee80211_ptr;
1289 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
1290 int i;
1291 #ifdef CONFIG_CFG80211_WEXT
1292 union iwreq_data wrqu;
1293 #endif
1294
1295 ASSERT_WDEV_LOCK(wdev);
1296
1297 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION &&
1298 wdev->iftype != NL80211_IFTYPE_P2P_CLIENT))
1299 return;
1300
1301 cfg80211_wdev_release_bsses(wdev);
1302 wdev->connected = false;
1303 wdev->u.client.ssid_len = 0;
1304 wdev->conn_owner_nlportid = 0;
1305 kfree_sensitive(wdev->connect_keys);
1306 wdev->connect_keys = NULL;
1307
1308 nl80211_send_disconnected(rdev, dev, reason, ie, ie_len, from_ap);
1309
1310 /* stop critical protocol if supported */
1311 if (rdev->ops->crit_proto_stop && rdev->crit_proto_nlportid) {
1312 rdev->crit_proto_nlportid = 0;
1313 rdev_crit_proto_stop(rdev, wdev);
1314 }
1315
1316 /*
1317 * Delete all the keys ... pairwise keys can't really
1318 * exist any more anyway, but default keys might.
1319 */
1320 if (rdev->ops->del_key) {
1321 int max_key_idx = 5;
1322
1323 if (wiphy_ext_feature_isset(
1324 wdev->wiphy,
1325 NL80211_EXT_FEATURE_BEACON_PROTECTION) ||
1326 wiphy_ext_feature_isset(
1327 wdev->wiphy,
1328 NL80211_EXT_FEATURE_BEACON_PROTECTION_CLIENT))
1329 max_key_idx = 7;
1330 for (i = 0; i <= max_key_idx; i++)
1331 rdev_del_key(rdev, dev, -1, i, false, NULL);
1332 }
1333
1334 rdev_set_qos_map(rdev, dev, NULL);
1335
1336 #ifdef CONFIG_CFG80211_WEXT
1337 memset(&wrqu, 0, sizeof(wrqu));
1338 wrqu.ap_addr.sa_family = ARPHRD_ETHER;
1339 wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL);
1340 wdev->wext.connect.ssid_len = 0;
1341 #endif
1342
1343 schedule_work(&cfg80211_disconnect_work);
1344 }
1345
cfg80211_disconnected(struct net_device * dev,u16 reason,const u8 * ie,size_t ie_len,bool locally_generated,gfp_t gfp)1346 void cfg80211_disconnected(struct net_device *dev, u16 reason,
1347 const u8 *ie, size_t ie_len,
1348 bool locally_generated, gfp_t gfp)
1349 {
1350 struct wireless_dev *wdev = dev->ieee80211_ptr;
1351 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
1352 struct cfg80211_event *ev;
1353 unsigned long flags;
1354
1355 ev = kzalloc(sizeof(*ev) + ie_len, gfp);
1356 if (!ev)
1357 return;
1358
1359 ev->type = EVENT_DISCONNECTED;
1360 ev->dc.ie = ((u8 *)ev) + sizeof(*ev);
1361 ev->dc.ie_len = ie_len;
1362 memcpy((void *)ev->dc.ie, ie, ie_len);
1363 ev->dc.reason = reason;
1364 ev->dc.locally_generated = locally_generated;
1365
1366 spin_lock_irqsave(&wdev->event_lock, flags);
1367 list_add_tail(&ev->list, &wdev->event_list);
1368 spin_unlock_irqrestore(&wdev->event_lock, flags);
1369 queue_work(cfg80211_wq, &rdev->event_work);
1370 }
1371 EXPORT_SYMBOL(cfg80211_disconnected);
1372
1373 /*
1374 * API calls for nl80211/wext compatibility code
1375 */
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)1376 int cfg80211_connect(struct cfg80211_registered_device *rdev,
1377 struct net_device *dev,
1378 struct cfg80211_connect_params *connect,
1379 struct cfg80211_cached_keys *connkeys,
1380 const u8 *prev_bssid)
1381 {
1382 struct wireless_dev *wdev = dev->ieee80211_ptr;
1383 int err;
1384
1385 ASSERT_WDEV_LOCK(wdev);
1386
1387 /*
1388 * If we have an ssid_len, we're trying to connect or are
1389 * already connected, so reject a new SSID unless it's the
1390 * same (which is the case for re-association.)
1391 */
1392 if (wdev->u.client.ssid_len &&
1393 (wdev->u.client.ssid_len != connect->ssid_len ||
1394 memcmp(wdev->u.client.ssid, connect->ssid, wdev->u.client.ssid_len)))
1395 return -EALREADY;
1396
1397 /*
1398 * If connected, reject (re-)association unless prev_bssid
1399 * matches the current BSSID.
1400 */
1401 if (wdev->connected) {
1402 if (!prev_bssid)
1403 return -EALREADY;
1404 if (!ether_addr_equal(prev_bssid,
1405 wdev->u.client.connected_addr))
1406 return -ENOTCONN;
1407 }
1408
1409 /*
1410 * Reject if we're in the process of connecting with WEP,
1411 * this case isn't very interesting and trying to handle
1412 * it would make the code much more complex.
1413 */
1414 if (wdev->connect_keys)
1415 return -EINPROGRESS;
1416
1417 cfg80211_oper_and_ht_capa(&connect->ht_capa_mask,
1418 rdev->wiphy.ht_capa_mod_mask);
1419 cfg80211_oper_and_vht_capa(&connect->vht_capa_mask,
1420 rdev->wiphy.vht_capa_mod_mask);
1421
1422 if (connkeys && connkeys->def >= 0) {
1423 int idx;
1424 u32 cipher;
1425
1426 idx = connkeys->def;
1427 cipher = connkeys->params[idx].cipher;
1428 /* If given a WEP key we may need it for shared key auth */
1429 if (cipher == WLAN_CIPHER_SUITE_WEP40 ||
1430 cipher == WLAN_CIPHER_SUITE_WEP104) {
1431 connect->key_idx = idx;
1432 connect->key = connkeys->params[idx].key;
1433 connect->key_len = connkeys->params[idx].key_len;
1434
1435 /*
1436 * If ciphers are not set (e.g. when going through
1437 * iwconfig), we have to set them appropriately here.
1438 */
1439 if (connect->crypto.cipher_group == 0)
1440 connect->crypto.cipher_group = cipher;
1441
1442 if (connect->crypto.n_ciphers_pairwise == 0) {
1443 connect->crypto.n_ciphers_pairwise = 1;
1444 connect->crypto.ciphers_pairwise[0] = cipher;
1445 }
1446 }
1447
1448 connect->crypto.wep_keys = connkeys->params;
1449 connect->crypto.wep_tx_key = connkeys->def;
1450 } else {
1451 if (WARN_ON(connkeys))
1452 return -EINVAL;
1453 }
1454
1455 wdev->connect_keys = connkeys;
1456 memcpy(wdev->u.client.ssid, connect->ssid, connect->ssid_len);
1457 wdev->u.client.ssid_len = connect->ssid_len;
1458
1459 wdev->conn_bss_type = connect->pbss ? IEEE80211_BSS_TYPE_PBSS :
1460 IEEE80211_BSS_TYPE_ESS;
1461
1462 if (!rdev->ops->connect)
1463 err = cfg80211_sme_connect(wdev, connect, prev_bssid);
1464 else
1465 err = rdev_connect(rdev, dev, connect);
1466
1467 if (err) {
1468 wdev->connect_keys = NULL;
1469 /*
1470 * This could be reassoc getting refused, don't clear
1471 * ssid_len in that case.
1472 */
1473 if (!wdev->connected)
1474 wdev->u.client.ssid_len = 0;
1475 return err;
1476 }
1477
1478 return 0;
1479 }
1480
cfg80211_disconnect(struct cfg80211_registered_device * rdev,struct net_device * dev,u16 reason,bool wextev)1481 int cfg80211_disconnect(struct cfg80211_registered_device *rdev,
1482 struct net_device *dev, u16 reason, bool wextev)
1483 {
1484 struct wireless_dev *wdev = dev->ieee80211_ptr;
1485 int err = 0;
1486
1487 ASSERT_WDEV_LOCK(wdev);
1488
1489 kfree_sensitive(wdev->connect_keys);
1490 wdev->connect_keys = NULL;
1491
1492 wdev->conn_owner_nlportid = 0;
1493
1494 if (wdev->conn)
1495 err = cfg80211_sme_disconnect(wdev, reason);
1496 else if (!rdev->ops->disconnect)
1497 cfg80211_mlme_down(rdev, dev);
1498 else if (wdev->u.client.ssid_len)
1499 err = rdev_disconnect(rdev, dev, reason);
1500
1501 /*
1502 * Clear ssid_len unless we actually were fully connected,
1503 * in which case cfg80211_disconnected() will take care of
1504 * this later.
1505 */
1506 if (!wdev->connected)
1507 wdev->u.client.ssid_len = 0;
1508
1509 return err;
1510 }
1511
1512 /*
1513 * Used to clean up after the connection / connection attempt owner socket
1514 * disconnects
1515 */
cfg80211_autodisconnect_wk(struct work_struct * work)1516 void cfg80211_autodisconnect_wk(struct work_struct *work)
1517 {
1518 struct wireless_dev *wdev =
1519 container_of(work, struct wireless_dev, disconnect_wk);
1520 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
1521
1522 wdev_lock(wdev);
1523
1524 if (wdev->conn_owner_nlportid) {
1525 switch (wdev->iftype) {
1526 case NL80211_IFTYPE_ADHOC:
1527 __cfg80211_leave_ibss(rdev, wdev->netdev, false);
1528 break;
1529 case NL80211_IFTYPE_AP:
1530 case NL80211_IFTYPE_P2P_GO:
1531 __cfg80211_stop_ap(rdev, wdev->netdev, -1, false);
1532 break;
1533 case NL80211_IFTYPE_MESH_POINT:
1534 __cfg80211_leave_mesh(rdev, wdev->netdev);
1535 break;
1536 case NL80211_IFTYPE_STATION:
1537 case NL80211_IFTYPE_P2P_CLIENT:
1538 /*
1539 * Use disconnect_bssid if still connecting and
1540 * ops->disconnect not implemented. Otherwise we can
1541 * use cfg80211_disconnect.
1542 */
1543 if (rdev->ops->disconnect || wdev->connected)
1544 cfg80211_disconnect(rdev, wdev->netdev,
1545 WLAN_REASON_DEAUTH_LEAVING,
1546 true);
1547 else
1548 cfg80211_mlme_deauth(rdev, wdev->netdev,
1549 wdev->disconnect_bssid,
1550 NULL, 0,
1551 WLAN_REASON_DEAUTH_LEAVING,
1552 false);
1553 break;
1554 default:
1555 break;
1556 }
1557 }
1558
1559 wdev_unlock(wdev);
1560 }
1561