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.bss = cfg80211_get_bss(&rdev->wiphy, params->channel,
175 params->bssid,
176 params->ssid, params->ssid_len,
177 IEEE80211_BSS_TYPE_ESS,
178 IEEE80211_PRIVACY_ANY);
179 auth_req.link_id = -1;
180 err = cfg80211_mlme_auth(rdev, wdev->netdev, &auth_req);
181 cfg80211_put_bss(&rdev->wiphy, auth_req.bss);
182 return err;
183 case CFG80211_CONN_AUTH_FAILED_TIMEOUT:
184 *treason = NL80211_TIMEOUT_AUTH;
185 return -ENOTCONN;
186 case CFG80211_CONN_ASSOCIATE_NEXT:
187 if (WARN_ON(!rdev->ops->assoc))
188 return -EOPNOTSUPP;
189 wdev->conn->state = CFG80211_CONN_ASSOCIATING;
190 if (wdev->conn->prev_bssid_valid)
191 req.prev_bssid = wdev->conn->prev_bssid;
192 req.ie = params->ie;
193 req.ie_len = params->ie_len;
194 req.use_mfp = params->mfp != NL80211_MFP_NO;
195 req.crypto = params->crypto;
196 req.flags = params->flags;
197 req.ht_capa = params->ht_capa;
198 req.ht_capa_mask = params->ht_capa_mask;
199 req.vht_capa = params->vht_capa;
200 req.vht_capa_mask = params->vht_capa_mask;
201 req.link_id = -1;
202
203 req.bss = cfg80211_get_bss(&rdev->wiphy, params->channel,
204 params->bssid,
205 params->ssid, params->ssid_len,
206 IEEE80211_BSS_TYPE_ESS,
207 IEEE80211_PRIVACY_ANY);
208 if (!req.bss) {
209 err = -ENOENT;
210 } else {
211 err = cfg80211_mlme_assoc(rdev, wdev->netdev, &req);
212 cfg80211_put_bss(&rdev->wiphy, req.bss);
213 }
214
215 if (err)
216 cfg80211_mlme_deauth(rdev, wdev->netdev, params->bssid,
217 NULL, 0,
218 WLAN_REASON_DEAUTH_LEAVING,
219 false);
220 return err;
221 case CFG80211_CONN_ASSOC_FAILED_TIMEOUT:
222 *treason = NL80211_TIMEOUT_ASSOC;
223 fallthrough;
224 case CFG80211_CONN_ASSOC_FAILED:
225 cfg80211_mlme_deauth(rdev, wdev->netdev, params->bssid,
226 NULL, 0,
227 WLAN_REASON_DEAUTH_LEAVING, false);
228 return -ENOTCONN;
229 case CFG80211_CONN_DEAUTH:
230 cfg80211_mlme_deauth(rdev, wdev->netdev, params->bssid,
231 NULL, 0,
232 WLAN_REASON_DEAUTH_LEAVING, false);
233 fallthrough;
234 case CFG80211_CONN_ABANDON:
235 /* free directly, disconnected event already sent */
236 cfg80211_sme_free(wdev);
237 return 0;
238 default:
239 return 0;
240 }
241 }
242
cfg80211_conn_work(struct work_struct * work)243 void cfg80211_conn_work(struct work_struct *work)
244 {
245 struct cfg80211_registered_device *rdev =
246 container_of(work, struct cfg80211_registered_device, conn_work);
247 struct wireless_dev *wdev;
248 u8 bssid_buf[ETH_ALEN], *bssid = NULL;
249 enum nl80211_timeout_reason treason;
250
251 wiphy_lock(&rdev->wiphy);
252
253 list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) {
254 if (!wdev->netdev)
255 continue;
256
257 wdev_lock(wdev);
258 if (!netif_running(wdev->netdev)) {
259 wdev_unlock(wdev);
260 continue;
261 }
262 if (!wdev->conn ||
263 wdev->conn->state == CFG80211_CONN_CONNECTED) {
264 wdev_unlock(wdev);
265 continue;
266 }
267 if (wdev->conn->params.bssid) {
268 memcpy(bssid_buf, wdev->conn->params.bssid, ETH_ALEN);
269 bssid = bssid_buf;
270 }
271 treason = NL80211_TIMEOUT_UNSPECIFIED;
272 if (cfg80211_conn_do_work(wdev, &treason)) {
273 struct cfg80211_connect_resp_params cr;
274
275 memset(&cr, 0, sizeof(cr));
276 cr.status = -1;
277 cr.links[0].bssid = bssid;
278 cr.timeout_reason = treason;
279 __cfg80211_connect_result(wdev->netdev, &cr, false);
280 }
281 wdev_unlock(wdev);
282 }
283
284 wiphy_unlock(&rdev->wiphy);
285 }
286
cfg80211_step_auth_next(struct cfg80211_conn * conn,struct cfg80211_bss * bss)287 static void cfg80211_step_auth_next(struct cfg80211_conn *conn,
288 struct cfg80211_bss *bss)
289 {
290 memcpy(conn->bssid, bss->bssid, ETH_ALEN);
291 conn->params.bssid = conn->bssid;
292 conn->params.channel = bss->channel;
293 conn->state = CFG80211_CONN_AUTHENTICATE_NEXT;
294 }
295
296 /* Returned bss is reference counted and must be cleaned up appropriately. */
cfg80211_get_conn_bss(struct wireless_dev * wdev)297 static struct cfg80211_bss *cfg80211_get_conn_bss(struct wireless_dev *wdev)
298 {
299 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
300 struct cfg80211_bss *bss;
301
302 ASSERT_WDEV_LOCK(wdev);
303
304 bss = cfg80211_get_bss(wdev->wiphy, wdev->conn->params.channel,
305 wdev->conn->params.bssid,
306 wdev->conn->params.ssid,
307 wdev->conn->params.ssid_len,
308 wdev->conn_bss_type,
309 IEEE80211_PRIVACY(wdev->conn->params.privacy));
310 if (!bss)
311 return NULL;
312
313 cfg80211_step_auth_next(wdev->conn, bss);
314 schedule_work(&rdev->conn_work);
315
316 return bss;
317 }
318
__cfg80211_sme_scan_done(struct net_device * dev)319 static void __cfg80211_sme_scan_done(struct net_device *dev)
320 {
321 struct wireless_dev *wdev = dev->ieee80211_ptr;
322 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
323 struct cfg80211_bss *bss;
324
325 ASSERT_WDEV_LOCK(wdev);
326
327 if (!wdev->conn)
328 return;
329
330 if (wdev->conn->state != CFG80211_CONN_SCANNING &&
331 wdev->conn->state != CFG80211_CONN_SCAN_AGAIN)
332 return;
333
334 bss = cfg80211_get_conn_bss(wdev);
335 if (bss)
336 cfg80211_put_bss(&rdev->wiphy, bss);
337 else
338 schedule_work(&rdev->conn_work);
339 }
340
cfg80211_sme_scan_done(struct net_device * dev)341 void cfg80211_sme_scan_done(struct net_device *dev)
342 {
343 struct wireless_dev *wdev = dev->ieee80211_ptr;
344
345 wdev_lock(wdev);
346 __cfg80211_sme_scan_done(dev);
347 wdev_unlock(wdev);
348 }
349
cfg80211_sme_rx_auth(struct wireless_dev * wdev,const u8 * buf,size_t len)350 void cfg80211_sme_rx_auth(struct wireless_dev *wdev, const u8 *buf, size_t len)
351 {
352 struct wiphy *wiphy = wdev->wiphy;
353 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
354 struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)buf;
355 u16 status_code = le16_to_cpu(mgmt->u.auth.status_code);
356
357 ASSERT_WDEV_LOCK(wdev);
358
359 if (!wdev->conn || wdev->conn->state == CFG80211_CONN_CONNECTED)
360 return;
361
362 if (status_code == WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG &&
363 wdev->conn->auto_auth &&
364 wdev->conn->params.auth_type != NL80211_AUTHTYPE_NETWORK_EAP) {
365 /* select automatically between only open, shared, leap */
366 switch (wdev->conn->params.auth_type) {
367 case NL80211_AUTHTYPE_OPEN_SYSTEM:
368 if (wdev->connect_keys)
369 wdev->conn->params.auth_type =
370 NL80211_AUTHTYPE_SHARED_KEY;
371 else
372 wdev->conn->params.auth_type =
373 NL80211_AUTHTYPE_NETWORK_EAP;
374 break;
375 case NL80211_AUTHTYPE_SHARED_KEY:
376 wdev->conn->params.auth_type =
377 NL80211_AUTHTYPE_NETWORK_EAP;
378 break;
379 default:
380 /* huh? */
381 wdev->conn->params.auth_type =
382 NL80211_AUTHTYPE_OPEN_SYSTEM;
383 break;
384 }
385 wdev->conn->state = CFG80211_CONN_AUTHENTICATE_NEXT;
386 schedule_work(&rdev->conn_work);
387 } else if (status_code != WLAN_STATUS_SUCCESS) {
388 struct cfg80211_connect_resp_params cr;
389
390 memset(&cr, 0, sizeof(cr));
391 cr.status = status_code;
392 cr.links[0].bssid = mgmt->bssid;
393 cr.timeout_reason = NL80211_TIMEOUT_UNSPECIFIED;
394 __cfg80211_connect_result(wdev->netdev, &cr, false);
395 } else if (wdev->conn->state == CFG80211_CONN_AUTHENTICATING) {
396 wdev->conn->state = CFG80211_CONN_ASSOCIATE_NEXT;
397 schedule_work(&rdev->conn_work);
398 }
399 }
400
cfg80211_sme_rx_assoc_resp(struct wireless_dev * wdev,u16 status)401 bool cfg80211_sme_rx_assoc_resp(struct wireless_dev *wdev, u16 status)
402 {
403 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
404
405 if (!wdev->conn)
406 return false;
407
408 if (status == WLAN_STATUS_SUCCESS) {
409 wdev->conn->state = CFG80211_CONN_CONNECTED;
410 return false;
411 }
412
413 if (wdev->conn->prev_bssid_valid) {
414 /*
415 * Some stupid APs don't accept reassoc, so we
416 * need to fall back to trying regular assoc;
417 * return true so no event is sent to userspace.
418 */
419 wdev->conn->prev_bssid_valid = false;
420 wdev->conn->state = CFG80211_CONN_ASSOCIATE_NEXT;
421 schedule_work(&rdev->conn_work);
422 return true;
423 }
424
425 wdev->conn->state = CFG80211_CONN_ASSOC_FAILED;
426 schedule_work(&rdev->conn_work);
427 return false;
428 }
429
cfg80211_sme_deauth(struct wireless_dev * wdev)430 void cfg80211_sme_deauth(struct wireless_dev *wdev)
431 {
432 cfg80211_sme_free(wdev);
433 }
434
cfg80211_sme_auth_timeout(struct wireless_dev * wdev)435 void cfg80211_sme_auth_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_AUTH_FAILED_TIMEOUT;
443 schedule_work(&rdev->conn_work);
444 }
445
cfg80211_sme_disassoc(struct wireless_dev * wdev)446 void cfg80211_sme_disassoc(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_DEAUTH;
454 schedule_work(&rdev->conn_work);
455 }
456
cfg80211_sme_assoc_timeout(struct wireless_dev * wdev)457 void cfg80211_sme_assoc_timeout(struct wireless_dev *wdev)
458 {
459 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
460
461 if (!wdev->conn)
462 return;
463
464 wdev->conn->state = CFG80211_CONN_ASSOC_FAILED_TIMEOUT;
465 schedule_work(&rdev->conn_work);
466 }
467
cfg80211_sme_abandon_assoc(struct wireless_dev * wdev)468 void cfg80211_sme_abandon_assoc(struct wireless_dev *wdev)
469 {
470 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
471
472 if (!wdev->conn)
473 return;
474
475 wdev->conn->state = CFG80211_CONN_ABANDON;
476 schedule_work(&rdev->conn_work);
477 }
478
cfg80211_wdev_release_bsses(struct wireless_dev * wdev)479 static void cfg80211_wdev_release_bsses(struct wireless_dev *wdev)
480 {
481 unsigned int link;
482
483 for_each_valid_link(wdev, link) {
484 if (!wdev->links[link].client.current_bss)
485 continue;
486 cfg80211_unhold_bss(wdev->links[link].client.current_bss);
487 cfg80211_put_bss(wdev->wiphy,
488 &wdev->links[link].client.current_bss->pub);
489 wdev->links[link].client.current_bss = NULL;
490 }
491 }
492
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)493 static int cfg80211_sme_get_conn_ies(struct wireless_dev *wdev,
494 const u8 *ies, size_t ies_len,
495 const u8 **out_ies, size_t *out_ies_len)
496 {
497 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
498 u8 *buf;
499 size_t offs;
500
501 if (!rdev->wiphy.extended_capabilities_len ||
502 (ies && cfg80211_find_ie(WLAN_EID_EXT_CAPABILITY, ies, ies_len))) {
503 *out_ies = kmemdup(ies, ies_len, GFP_KERNEL);
504 if (!*out_ies)
505 return -ENOMEM;
506 *out_ies_len = ies_len;
507 return 0;
508 }
509
510 buf = kmalloc(ies_len + rdev->wiphy.extended_capabilities_len + 2,
511 GFP_KERNEL);
512 if (!buf)
513 return -ENOMEM;
514
515 if (ies_len) {
516 static const u8 before_extcapa[] = {
517 /* not listing IEs expected to be created by driver */
518 WLAN_EID_RSN,
519 WLAN_EID_QOS_CAPA,
520 WLAN_EID_RRM_ENABLED_CAPABILITIES,
521 WLAN_EID_MOBILITY_DOMAIN,
522 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
523 WLAN_EID_BSS_COEX_2040,
524 };
525
526 offs = ieee80211_ie_split(ies, ies_len, before_extcapa,
527 ARRAY_SIZE(before_extcapa), 0);
528 memcpy(buf, ies, offs);
529 /* leave a whole for extended capabilities IE */
530 memcpy(buf + offs + rdev->wiphy.extended_capabilities_len + 2,
531 ies + offs, ies_len - offs);
532 } else {
533 offs = 0;
534 }
535
536 /* place extended capabilities IE (with only driver capabilities) */
537 buf[offs] = WLAN_EID_EXT_CAPABILITY;
538 buf[offs + 1] = rdev->wiphy.extended_capabilities_len;
539 memcpy(buf + offs + 2,
540 rdev->wiphy.extended_capabilities,
541 rdev->wiphy.extended_capabilities_len);
542
543 *out_ies = buf;
544 *out_ies_len = ies_len + rdev->wiphy.extended_capabilities_len + 2;
545
546 return 0;
547 }
548
cfg80211_sme_connect(struct wireless_dev * wdev,struct cfg80211_connect_params * connect,const u8 * prev_bssid)549 static int cfg80211_sme_connect(struct wireless_dev *wdev,
550 struct cfg80211_connect_params *connect,
551 const u8 *prev_bssid)
552 {
553 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
554 struct cfg80211_bss *bss;
555 int err;
556
557 if (!rdev->ops->auth || !rdev->ops->assoc)
558 return -EOPNOTSUPP;
559
560 cfg80211_wdev_release_bsses(wdev);
561
562 if (wdev->connected) {
563 cfg80211_sme_free(wdev);
564 wdev->connected = false;
565 }
566
567 if (wdev->conn)
568 return -EINPROGRESS;
569
570 wdev->conn = kzalloc(sizeof(*wdev->conn), GFP_KERNEL);
571 if (!wdev->conn)
572 return -ENOMEM;
573
574 /*
575 * Copy all parameters, and treat explicitly IEs, BSSID, SSID.
576 */
577 memcpy(&wdev->conn->params, connect, sizeof(*connect));
578 if (connect->bssid) {
579 wdev->conn->params.bssid = wdev->conn->bssid;
580 memcpy(wdev->conn->bssid, connect->bssid, ETH_ALEN);
581 }
582
583 if (cfg80211_sme_get_conn_ies(wdev, connect->ie, connect->ie_len,
584 &wdev->conn->ie,
585 &wdev->conn->params.ie_len)) {
586 kfree(wdev->conn);
587 wdev->conn = NULL;
588 return -ENOMEM;
589 }
590 wdev->conn->params.ie = wdev->conn->ie;
591
592 if (connect->auth_type == NL80211_AUTHTYPE_AUTOMATIC) {
593 wdev->conn->auto_auth = true;
594 /* start with open system ... should mostly work */
595 wdev->conn->params.auth_type =
596 NL80211_AUTHTYPE_OPEN_SYSTEM;
597 } else {
598 wdev->conn->auto_auth = false;
599 }
600
601 wdev->conn->params.ssid = wdev->u.client.ssid;
602 wdev->conn->params.ssid_len = wdev->u.client.ssid_len;
603
604 /* see if we have the bss already */
605 bss = cfg80211_get_bss(wdev->wiphy, wdev->conn->params.channel,
606 wdev->conn->params.bssid,
607 wdev->conn->params.ssid,
608 wdev->conn->params.ssid_len,
609 wdev->conn_bss_type,
610 IEEE80211_PRIVACY(wdev->conn->params.privacy));
611
612 if (prev_bssid) {
613 memcpy(wdev->conn->prev_bssid, prev_bssid, ETH_ALEN);
614 wdev->conn->prev_bssid_valid = true;
615 }
616
617 /* we're good if we have a matching bss struct */
618 if (bss) {
619 enum nl80211_timeout_reason treason;
620
621 cfg80211_step_auth_next(wdev->conn, bss);
622 err = cfg80211_conn_do_work(wdev, &treason);
623 cfg80211_put_bss(wdev->wiphy, bss);
624 } else {
625 /* otherwise we'll need to scan for the AP first */
626 err = cfg80211_conn_scan(wdev);
627
628 /*
629 * If we can't scan right now, then we need to scan again
630 * after the current scan finished, since the parameters
631 * changed (unless we find a good AP anyway).
632 */
633 if (err == -EBUSY) {
634 err = 0;
635 wdev->conn->state = CFG80211_CONN_SCAN_AGAIN;
636 }
637 }
638
639 if (err)
640 cfg80211_sme_free(wdev);
641
642 return err;
643 }
644
cfg80211_sme_disconnect(struct wireless_dev * wdev,u16 reason)645 static int cfg80211_sme_disconnect(struct wireless_dev *wdev, u16 reason)
646 {
647 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
648 int err;
649
650 if (!wdev->conn)
651 return 0;
652
653 if (!rdev->ops->deauth)
654 return -EOPNOTSUPP;
655
656 if (wdev->conn->state == CFG80211_CONN_SCANNING ||
657 wdev->conn->state == CFG80211_CONN_SCAN_AGAIN) {
658 err = 0;
659 goto out;
660 }
661
662 /* wdev->conn->params.bssid must be set if > SCANNING */
663 err = cfg80211_mlme_deauth(rdev, wdev->netdev,
664 wdev->conn->params.bssid,
665 NULL, 0, reason, false);
666 out:
667 cfg80211_sme_free(wdev);
668 return err;
669 }
670
671 /*
672 * code shared for in-device and software SME
673 */
674
cfg80211_is_all_idle(void)675 static bool cfg80211_is_all_idle(void)
676 {
677 struct cfg80211_registered_device *rdev;
678 struct wireless_dev *wdev;
679 bool is_all_idle = true;
680
681 /*
682 * All devices must be idle as otherwise if you are actively
683 * scanning some new beacon hints could be learned and would
684 * count as new regulatory hints.
685 * Also if there is any other active beaconing interface we
686 * need not issue a disconnect hint and reset any info such
687 * as chan dfs state, etc.
688 */
689 list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
690 list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) {
691 wdev_lock(wdev);
692 if (wdev->conn || wdev->connected ||
693 cfg80211_beaconing_iface_active(wdev))
694 is_all_idle = false;
695 wdev_unlock(wdev);
696 }
697 }
698
699 return is_all_idle;
700 }
701
disconnect_work(struct work_struct * work)702 static void disconnect_work(struct work_struct *work)
703 {
704 rtnl_lock();
705 if (cfg80211_is_all_idle())
706 regulatory_hint_disconnect();
707 rtnl_unlock();
708 }
709
710 DECLARE_WORK(cfg80211_disconnect_work, disconnect_work);
711
712 static void
cfg80211_connect_result_release_bsses(struct wireless_dev * wdev,struct cfg80211_connect_resp_params * cr)713 cfg80211_connect_result_release_bsses(struct wireless_dev *wdev,
714 struct cfg80211_connect_resp_params *cr)
715 {
716 unsigned int link;
717
718 for_each_valid_link(cr, link) {
719 if (!cr->links[link].bss)
720 continue;
721 cfg80211_unhold_bss(bss_from_pub(cr->links[link].bss));
722 cfg80211_put_bss(wdev->wiphy, cr->links[link].bss);
723 }
724 }
725
726 /*
727 * API calls for drivers implementing connect/disconnect and
728 * SME event handling
729 */
730
731 /* This method must consume bss one way or another */
__cfg80211_connect_result(struct net_device * dev,struct cfg80211_connect_resp_params * cr,bool wextev)732 void __cfg80211_connect_result(struct net_device *dev,
733 struct cfg80211_connect_resp_params *cr,
734 bool wextev)
735 {
736 struct wireless_dev *wdev = dev->ieee80211_ptr;
737 const struct element *country_elem = NULL;
738 const struct element *ssid;
739 const u8 *country_data;
740 u8 country_datalen;
741 #ifdef CONFIG_CFG80211_WEXT
742 union iwreq_data wrqu;
743 #endif
744 unsigned int link;
745 const u8 *connected_addr;
746 bool bss_not_found = false;
747
748 ASSERT_WDEV_LOCK(wdev);
749
750 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION &&
751 wdev->iftype != NL80211_IFTYPE_P2P_CLIENT))
752 goto out;
753
754 if (cr->valid_links) {
755 if (WARN_ON(!cr->ap_mld_addr))
756 goto out;
757
758 for_each_valid_link(cr, link) {
759 if (WARN_ON(!cr->links[link].addr))
760 goto out;
761 }
762
763 if (WARN_ON(wdev->connect_keys))
764 goto out;
765 }
766
767 wdev->unprot_beacon_reported = 0;
768 nl80211_send_connect_result(wiphy_to_rdev(wdev->wiphy), dev, cr,
769 GFP_KERNEL);
770 connected_addr = cr->valid_links ? cr->ap_mld_addr : cr->links[0].bssid;
771
772 #ifdef CONFIG_CFG80211_WEXT
773 if (wextev && !cr->valid_links) {
774 if (cr->req_ie && cr->status == WLAN_STATUS_SUCCESS) {
775 memset(&wrqu, 0, sizeof(wrqu));
776 wrqu.data.length = cr->req_ie_len;
777 wireless_send_event(dev, IWEVASSOCREQIE, &wrqu,
778 cr->req_ie);
779 }
780
781 if (cr->resp_ie && cr->status == WLAN_STATUS_SUCCESS) {
782 memset(&wrqu, 0, sizeof(wrqu));
783 wrqu.data.length = cr->resp_ie_len;
784 wireless_send_event(dev, IWEVASSOCRESPIE, &wrqu,
785 cr->resp_ie);
786 }
787
788 memset(&wrqu, 0, sizeof(wrqu));
789 wrqu.ap_addr.sa_family = ARPHRD_ETHER;
790 if (connected_addr && cr->status == WLAN_STATUS_SUCCESS) {
791 memcpy(wrqu.ap_addr.sa_data, connected_addr, ETH_ALEN);
792 memcpy(wdev->wext.prev_bssid, connected_addr, ETH_ALEN);
793 wdev->wext.prev_bssid_valid = true;
794 }
795 wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL);
796 }
797 #endif
798
799 if (cr->status == WLAN_STATUS_SUCCESS) {
800 if (!wiphy_to_rdev(wdev->wiphy)->ops->connect) {
801 for_each_valid_link(cr, link) {
802 if (WARN_ON_ONCE(!cr->links[link].bss))
803 break;
804 }
805 }
806
807 for_each_valid_link(cr, link) {
808 /* don't do extra lookups for failures */
809 if (cr->links[link].status != WLAN_STATUS_SUCCESS)
810 continue;
811
812 if (cr->links[link].bss)
813 continue;
814
815 cr->links[link].bss =
816 cfg80211_get_bss(wdev->wiphy, NULL,
817 cr->links[link].bssid,
818 wdev->u.client.ssid,
819 wdev->u.client.ssid_len,
820 wdev->conn_bss_type,
821 IEEE80211_PRIVACY_ANY);
822 if (!cr->links[link].bss) {
823 bss_not_found = true;
824 break;
825 }
826 cfg80211_hold_bss(bss_from_pub(cr->links[link].bss));
827 }
828 }
829
830 cfg80211_wdev_release_bsses(wdev);
831
832 if (cr->status != WLAN_STATUS_SUCCESS) {
833 kfree_sensitive(wdev->connect_keys);
834 wdev->connect_keys = NULL;
835 wdev->u.client.ssid_len = 0;
836 wdev->conn_owner_nlportid = 0;
837 cfg80211_connect_result_release_bsses(wdev, cr);
838 cfg80211_sme_free(wdev);
839 return;
840 }
841
842 if (WARN_ON(bss_not_found)) {
843 cfg80211_connect_result_release_bsses(wdev, cr);
844 return;
845 }
846
847 memset(wdev->links, 0, sizeof(wdev->links));
848 for_each_valid_link(cr, link) {
849 if (cr->links[link].status == WLAN_STATUS_SUCCESS)
850 continue;
851 cr->valid_links &= ~BIT(link);
852 /* don't require bss pointer for failed links */
853 if (!cr->links[link].bss)
854 continue;
855 cfg80211_unhold_bss(bss_from_pub(cr->links[link].bss));
856 cfg80211_put_bss(wdev->wiphy, cr->links[link].bss);
857 }
858 wdev->valid_links = cr->valid_links;
859 for_each_valid_link(cr, link)
860 wdev->links[link].client.current_bss =
861 bss_from_pub(cr->links[link].bss);
862 wdev->connected = true;
863 ether_addr_copy(wdev->u.client.connected_addr, connected_addr);
864 if (cr->valid_links) {
865 for_each_valid_link(cr, link)
866 memcpy(wdev->links[link].addr, cr->links[link].addr,
867 ETH_ALEN);
868 }
869
870 if (!(wdev->wiphy->flags & WIPHY_FLAG_HAS_STATIC_WEP))
871 cfg80211_upload_connect_keys(wdev);
872
873 rcu_read_lock();
874 for_each_valid_link(cr, link) {
875 country_elem =
876 ieee80211_bss_get_elem(cr->links[link].bss,
877 WLAN_EID_COUNTRY);
878 if (country_elem)
879 break;
880 }
881 if (!country_elem) {
882 rcu_read_unlock();
883 return;
884 }
885
886 country_datalen = country_elem->datalen;
887 country_data = kmemdup(country_elem->data, country_datalen, GFP_ATOMIC);
888 rcu_read_unlock();
889
890 if (!country_data)
891 return;
892
893 regulatory_hint_country_ie(wdev->wiphy,
894 cr->links[link].bss->channel->band,
895 country_data, country_datalen);
896 kfree(country_data);
897
898 if (!wdev->u.client.ssid_len) {
899 rcu_read_lock();
900 for_each_valid_link(cr, link) {
901 ssid = ieee80211_bss_get_elem(cr->links[link].bss,
902 WLAN_EID_SSID);
903
904 if (!ssid || !ssid->datalen)
905 continue;
906
907 memcpy(wdev->u.client.ssid, ssid->data, ssid->datalen);
908 wdev->u.client.ssid_len = ssid->datalen;
909 break;
910 }
911 rcu_read_unlock();
912 }
913
914 return;
915 out:
916 for_each_valid_link(cr, link)
917 cfg80211_put_bss(wdev->wiphy, cr->links[link].bss);
918 }
919
cfg80211_update_link_bss(struct wireless_dev * wdev,struct cfg80211_bss ** bss)920 static void cfg80211_update_link_bss(struct wireless_dev *wdev,
921 struct cfg80211_bss **bss)
922 {
923 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
924 struct cfg80211_internal_bss *ibss;
925
926 if (!*bss)
927 return;
928
929 ibss = bss_from_pub(*bss);
930 if (list_empty(&ibss->list)) {
931 struct cfg80211_bss *found = NULL, *tmp = *bss;
932
933 found = cfg80211_get_bss(wdev->wiphy, NULL,
934 (*bss)->bssid,
935 wdev->u.client.ssid,
936 wdev->u.client.ssid_len,
937 wdev->conn_bss_type,
938 IEEE80211_PRIVACY_ANY);
939 if (found) {
940 /* The same BSS is already updated so use it
941 * instead, as it has latest info.
942 */
943 *bss = found;
944 } else {
945 /* Update with BSS provided by driver, it will
946 * be freshly added and ref cnted, we can free
947 * the old one.
948 *
949 * signal_valid can be false, as we are not
950 * expecting the BSS to be found.
951 *
952 * keep the old timestamp to avoid confusion
953 */
954 cfg80211_bss_update(rdev, ibss, false,
955 ibss->ts);
956 }
957
958 cfg80211_put_bss(wdev->wiphy, tmp);
959 }
960 }
961
962 /* Consumes bss object(s) one way or another */
cfg80211_connect_done(struct net_device * dev,struct cfg80211_connect_resp_params * params,gfp_t gfp)963 void cfg80211_connect_done(struct net_device *dev,
964 struct cfg80211_connect_resp_params *params,
965 gfp_t gfp)
966 {
967 struct wireless_dev *wdev = dev->ieee80211_ptr;
968 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
969 struct cfg80211_event *ev;
970 unsigned long flags;
971 u8 *next;
972 size_t link_info_size = 0;
973 unsigned int link;
974
975 for_each_valid_link(params, link) {
976 cfg80211_update_link_bss(wdev, ¶ms->links[link].bss);
977 link_info_size += params->links[link].bssid ? ETH_ALEN : 0;
978 link_info_size += params->links[link].addr ? ETH_ALEN : 0;
979 }
980
981 ev = kzalloc(sizeof(*ev) + (params->ap_mld_addr ? ETH_ALEN : 0) +
982 params->req_ie_len + params->resp_ie_len +
983 params->fils.kek_len + params->fils.pmk_len +
984 (params->fils.pmkid ? WLAN_PMKID_LEN : 0) + link_info_size,
985 gfp);
986
987 if (!ev) {
988 for_each_valid_link(params, link)
989 cfg80211_put_bss(wdev->wiphy,
990 params->links[link].bss);
991 return;
992 }
993
994 ev->type = EVENT_CONNECT_RESULT;
995 next = ((u8 *)ev) + sizeof(*ev);
996 if (params->ap_mld_addr) {
997 ev->cr.ap_mld_addr = next;
998 memcpy((void *)ev->cr.ap_mld_addr, params->ap_mld_addr,
999 ETH_ALEN);
1000 next += ETH_ALEN;
1001 }
1002 if (params->req_ie_len) {
1003 ev->cr.req_ie = next;
1004 ev->cr.req_ie_len = params->req_ie_len;
1005 memcpy((void *)ev->cr.req_ie, params->req_ie,
1006 params->req_ie_len);
1007 next += params->req_ie_len;
1008 }
1009 if (params->resp_ie_len) {
1010 ev->cr.resp_ie = next;
1011 ev->cr.resp_ie_len = params->resp_ie_len;
1012 memcpy((void *)ev->cr.resp_ie, params->resp_ie,
1013 params->resp_ie_len);
1014 next += params->resp_ie_len;
1015 }
1016 if (params->fils.kek_len) {
1017 ev->cr.fils.kek = next;
1018 ev->cr.fils.kek_len = params->fils.kek_len;
1019 memcpy((void *)ev->cr.fils.kek, params->fils.kek,
1020 params->fils.kek_len);
1021 next += params->fils.kek_len;
1022 }
1023 if (params->fils.pmk_len) {
1024 ev->cr.fils.pmk = next;
1025 ev->cr.fils.pmk_len = params->fils.pmk_len;
1026 memcpy((void *)ev->cr.fils.pmk, params->fils.pmk,
1027 params->fils.pmk_len);
1028 next += params->fils.pmk_len;
1029 }
1030 if (params->fils.pmkid) {
1031 ev->cr.fils.pmkid = next;
1032 memcpy((void *)ev->cr.fils.pmkid, params->fils.pmkid,
1033 WLAN_PMKID_LEN);
1034 next += WLAN_PMKID_LEN;
1035 }
1036 ev->cr.fils.update_erp_next_seq_num = params->fils.update_erp_next_seq_num;
1037 if (params->fils.update_erp_next_seq_num)
1038 ev->cr.fils.erp_next_seq_num = params->fils.erp_next_seq_num;
1039 ev->cr.valid_links = params->valid_links;
1040 for_each_valid_link(params, link) {
1041 if (params->links[link].bss)
1042 cfg80211_hold_bss(
1043 bss_from_pub(params->links[link].bss));
1044 ev->cr.links[link].bss = params->links[link].bss;
1045
1046 if (params->links[link].addr) {
1047 ev->cr.links[link].addr = next;
1048 memcpy((void *)ev->cr.links[link].addr,
1049 params->links[link].addr,
1050 ETH_ALEN);
1051 next += ETH_ALEN;
1052 }
1053 if (params->links[link].bssid) {
1054 ev->cr.links[link].bssid = next;
1055 memcpy((void *)ev->cr.links[link].bssid,
1056 params->links[link].bssid,
1057 ETH_ALEN);
1058 next += ETH_ALEN;
1059 }
1060 }
1061 ev->cr.status = params->status;
1062 ev->cr.timeout_reason = params->timeout_reason;
1063
1064 spin_lock_irqsave(&wdev->event_lock, flags);
1065 list_add_tail(&ev->list, &wdev->event_list);
1066 spin_unlock_irqrestore(&wdev->event_lock, flags);
1067 queue_work(cfg80211_wq, &rdev->event_work);
1068 }
1069 EXPORT_SYMBOL(cfg80211_connect_done);
1070
1071 /* Consumes bss object one way or another */
__cfg80211_roamed(struct wireless_dev * wdev,struct cfg80211_roam_info * info)1072 void __cfg80211_roamed(struct wireless_dev *wdev,
1073 struct cfg80211_roam_info *info)
1074 {
1075 #ifdef CONFIG_CFG80211_WEXT
1076 union iwreq_data wrqu;
1077 #endif
1078 unsigned int link;
1079 const u8 *connected_addr;
1080
1081 ASSERT_WDEV_LOCK(wdev);
1082
1083 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION &&
1084 wdev->iftype != NL80211_IFTYPE_P2P_CLIENT))
1085 goto out;
1086
1087 if (WARN_ON(!wdev->connected))
1088 goto out;
1089
1090 if (info->valid_links) {
1091 if (WARN_ON(!info->ap_mld_addr))
1092 goto out;
1093
1094 for_each_valid_link(info, link) {
1095 if (WARN_ON(!info->links[link].addr))
1096 goto out;
1097 }
1098 }
1099
1100 cfg80211_wdev_release_bsses(wdev);
1101
1102 for_each_valid_link(info, link) {
1103 if (WARN_ON(!info->links[link].bss))
1104 goto out;
1105 }
1106
1107 memset(wdev->links, 0, sizeof(wdev->links));
1108 wdev->valid_links = info->valid_links;
1109 for_each_valid_link(info, link) {
1110 cfg80211_hold_bss(bss_from_pub(info->links[link].bss));
1111 wdev->links[link].client.current_bss =
1112 bss_from_pub(info->links[link].bss);
1113 }
1114
1115 connected_addr = info->valid_links ?
1116 info->ap_mld_addr :
1117 info->links[0].bss->bssid;
1118 ether_addr_copy(wdev->u.client.connected_addr, connected_addr);
1119 if (info->valid_links) {
1120 for_each_valid_link(info, link)
1121 memcpy(wdev->links[link].addr, info->links[link].addr,
1122 ETH_ALEN);
1123 }
1124 wdev->unprot_beacon_reported = 0;
1125 nl80211_send_roamed(wiphy_to_rdev(wdev->wiphy),
1126 wdev->netdev, info, GFP_KERNEL);
1127
1128 #ifdef CONFIG_CFG80211_WEXT
1129 if (!info->valid_links) {
1130 if (info->req_ie) {
1131 memset(&wrqu, 0, sizeof(wrqu));
1132 wrqu.data.length = info->req_ie_len;
1133 wireless_send_event(wdev->netdev, IWEVASSOCREQIE,
1134 &wrqu, info->req_ie);
1135 }
1136
1137 if (info->resp_ie) {
1138 memset(&wrqu, 0, sizeof(wrqu));
1139 wrqu.data.length = info->resp_ie_len;
1140 wireless_send_event(wdev->netdev, IWEVASSOCRESPIE,
1141 &wrqu, info->resp_ie);
1142 }
1143
1144 memset(&wrqu, 0, sizeof(wrqu));
1145 wrqu.ap_addr.sa_family = ARPHRD_ETHER;
1146 memcpy(wrqu.ap_addr.sa_data, connected_addr, ETH_ALEN);
1147 memcpy(wdev->wext.prev_bssid, connected_addr, ETH_ALEN);
1148 wdev->wext.prev_bssid_valid = true;
1149 wireless_send_event(wdev->netdev, SIOCGIWAP, &wrqu, NULL);
1150 }
1151 #endif
1152
1153 return;
1154 out:
1155 for_each_valid_link(info, link)
1156 cfg80211_put_bss(wdev->wiphy, info->links[link].bss);
1157 }
1158
1159 /* Consumes info->links.bss object(s) one way or another */
cfg80211_roamed(struct net_device * dev,struct cfg80211_roam_info * info,gfp_t gfp)1160 void cfg80211_roamed(struct net_device *dev, struct cfg80211_roam_info *info,
1161 gfp_t gfp)
1162 {
1163 struct wireless_dev *wdev = dev->ieee80211_ptr;
1164 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
1165 struct cfg80211_event *ev;
1166 unsigned long flags;
1167 u8 *next;
1168 unsigned int link;
1169 size_t link_info_size = 0;
1170 bool bss_not_found = false;
1171
1172 for_each_valid_link(info, link) {
1173 link_info_size += info->links[link].addr ? ETH_ALEN : 0;
1174 link_info_size += info->links[link].bssid ? ETH_ALEN : 0;
1175
1176 if (info->links[link].bss)
1177 continue;
1178
1179 info->links[link].bss =
1180 cfg80211_get_bss(wdev->wiphy,
1181 info->links[link].channel,
1182 info->links[link].bssid,
1183 wdev->u.client.ssid,
1184 wdev->u.client.ssid_len,
1185 wdev->conn_bss_type,
1186 IEEE80211_PRIVACY_ANY);
1187
1188 if (!info->links[link].bss) {
1189 bss_not_found = true;
1190 break;
1191 }
1192 }
1193
1194 if (WARN_ON(bss_not_found))
1195 goto out;
1196
1197 ev = kzalloc(sizeof(*ev) + info->req_ie_len + info->resp_ie_len +
1198 info->fils.kek_len + info->fils.pmk_len +
1199 (info->fils.pmkid ? WLAN_PMKID_LEN : 0) +
1200 (info->ap_mld_addr ? ETH_ALEN : 0) + link_info_size, gfp);
1201 if (!ev)
1202 goto out;
1203
1204 ev->type = EVENT_ROAMED;
1205 next = ((u8 *)ev) + sizeof(*ev);
1206 if (info->req_ie_len) {
1207 ev->rm.req_ie = next;
1208 ev->rm.req_ie_len = info->req_ie_len;
1209 memcpy((void *)ev->rm.req_ie, info->req_ie, info->req_ie_len);
1210 next += info->req_ie_len;
1211 }
1212 if (info->resp_ie_len) {
1213 ev->rm.resp_ie = next;
1214 ev->rm.resp_ie_len = info->resp_ie_len;
1215 memcpy((void *)ev->rm.resp_ie, info->resp_ie,
1216 info->resp_ie_len);
1217 next += info->resp_ie_len;
1218 }
1219 if (info->fils.kek_len) {
1220 ev->rm.fils.kek = next;
1221 ev->rm.fils.kek_len = info->fils.kek_len;
1222 memcpy((void *)ev->rm.fils.kek, info->fils.kek,
1223 info->fils.kek_len);
1224 next += info->fils.kek_len;
1225 }
1226 if (info->fils.pmk_len) {
1227 ev->rm.fils.pmk = next;
1228 ev->rm.fils.pmk_len = info->fils.pmk_len;
1229 memcpy((void *)ev->rm.fils.pmk, info->fils.pmk,
1230 info->fils.pmk_len);
1231 next += info->fils.pmk_len;
1232 }
1233 if (info->fils.pmkid) {
1234 ev->rm.fils.pmkid = next;
1235 memcpy((void *)ev->rm.fils.pmkid, info->fils.pmkid,
1236 WLAN_PMKID_LEN);
1237 next += WLAN_PMKID_LEN;
1238 }
1239 ev->rm.fils.update_erp_next_seq_num = info->fils.update_erp_next_seq_num;
1240 if (info->fils.update_erp_next_seq_num)
1241 ev->rm.fils.erp_next_seq_num = info->fils.erp_next_seq_num;
1242 if (info->ap_mld_addr) {
1243 ev->rm.ap_mld_addr = next;
1244 memcpy((void *)ev->rm.ap_mld_addr, info->ap_mld_addr,
1245 ETH_ALEN);
1246 next += ETH_ALEN;
1247 }
1248 ev->rm.valid_links = info->valid_links;
1249 for_each_valid_link(info, link) {
1250 ev->rm.links[link].bss = info->links[link].bss;
1251
1252 if (info->links[link].addr) {
1253 ev->rm.links[link].addr = next;
1254 memcpy((void *)ev->rm.links[link].addr,
1255 info->links[link].addr,
1256 ETH_ALEN);
1257 next += ETH_ALEN;
1258 }
1259
1260 if (info->links[link].bssid) {
1261 ev->rm.links[link].bssid = next;
1262 memcpy((void *)ev->rm.links[link].bssid,
1263 info->links[link].bssid,
1264 ETH_ALEN);
1265 next += ETH_ALEN;
1266 }
1267 }
1268
1269 spin_lock_irqsave(&wdev->event_lock, flags);
1270 list_add_tail(&ev->list, &wdev->event_list);
1271 spin_unlock_irqrestore(&wdev->event_lock, flags);
1272 queue_work(cfg80211_wq, &rdev->event_work);
1273
1274 return;
1275 out:
1276 for_each_valid_link(info, link)
1277 cfg80211_put_bss(wdev->wiphy, info->links[link].bss);
1278
1279 }
1280 EXPORT_SYMBOL(cfg80211_roamed);
1281
__cfg80211_port_authorized(struct wireless_dev * wdev,const u8 * bssid,const u8 * td_bitmap,u8 td_bitmap_len)1282 void __cfg80211_port_authorized(struct wireless_dev *wdev, const u8 *bssid,
1283 const u8 *td_bitmap, u8 td_bitmap_len)
1284 {
1285 ASSERT_WDEV_LOCK(wdev);
1286
1287 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION &&
1288 wdev->iftype != NL80211_IFTYPE_P2P_CLIENT))
1289 return;
1290
1291 if (WARN_ON(!wdev->connected) ||
1292 WARN_ON(!ether_addr_equal(wdev->u.client.connected_addr, bssid)))
1293 return;
1294
1295 nl80211_send_port_authorized(wiphy_to_rdev(wdev->wiphy), wdev->netdev,
1296 bssid, td_bitmap, td_bitmap_len);
1297 }
1298
cfg80211_port_authorized(struct net_device * dev,const u8 * bssid,const u8 * td_bitmap,u8 td_bitmap_len,gfp_t gfp)1299 void cfg80211_port_authorized(struct net_device *dev, const u8 *bssid,
1300 const u8 *td_bitmap, u8 td_bitmap_len, gfp_t gfp)
1301 {
1302 struct wireless_dev *wdev = dev->ieee80211_ptr;
1303 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
1304 struct cfg80211_event *ev;
1305 unsigned long flags;
1306
1307 if (WARN_ON(!bssid))
1308 return;
1309
1310 ev = kzalloc(sizeof(*ev) + td_bitmap_len, gfp);
1311 if (!ev)
1312 return;
1313
1314 ev->type = EVENT_PORT_AUTHORIZED;
1315 memcpy(ev->pa.bssid, bssid, ETH_ALEN);
1316 ev->pa.td_bitmap = ((u8 *)ev) + sizeof(*ev);
1317 ev->pa.td_bitmap_len = td_bitmap_len;
1318 memcpy((void *)ev->pa.td_bitmap, td_bitmap, td_bitmap_len);
1319
1320 /*
1321 * Use the wdev event list so that if there are pending
1322 * connected/roamed events, they will be reported first.
1323 */
1324 spin_lock_irqsave(&wdev->event_lock, flags);
1325 list_add_tail(&ev->list, &wdev->event_list);
1326 spin_unlock_irqrestore(&wdev->event_lock, flags);
1327 queue_work(cfg80211_wq, &rdev->event_work);
1328 }
1329 EXPORT_SYMBOL(cfg80211_port_authorized);
1330
__cfg80211_disconnected(struct net_device * dev,const u8 * ie,size_t ie_len,u16 reason,bool from_ap)1331 void __cfg80211_disconnected(struct net_device *dev, const u8 *ie,
1332 size_t ie_len, u16 reason, bool from_ap)
1333 {
1334 struct wireless_dev *wdev = dev->ieee80211_ptr;
1335 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
1336 int i;
1337 #ifdef CONFIG_CFG80211_WEXT
1338 union iwreq_data wrqu;
1339 #endif
1340
1341 ASSERT_WDEV_LOCK(wdev);
1342
1343 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION &&
1344 wdev->iftype != NL80211_IFTYPE_P2P_CLIENT))
1345 return;
1346
1347 cfg80211_wdev_release_bsses(wdev);
1348 wdev->connected = false;
1349 wdev->u.client.ssid_len = 0;
1350 wdev->conn_owner_nlportid = 0;
1351 kfree_sensitive(wdev->connect_keys);
1352 wdev->connect_keys = NULL;
1353
1354 nl80211_send_disconnected(rdev, dev, reason, ie, ie_len, from_ap);
1355
1356 /* stop critical protocol if supported */
1357 if (rdev->ops->crit_proto_stop && rdev->crit_proto_nlportid) {
1358 rdev->crit_proto_nlportid = 0;
1359 rdev_crit_proto_stop(rdev, wdev);
1360 }
1361
1362 /*
1363 * Delete all the keys ... pairwise keys can't really
1364 * exist any more anyway, but default keys might.
1365 */
1366 if (rdev->ops->del_key) {
1367 int max_key_idx = 5;
1368
1369 if (wiphy_ext_feature_isset(
1370 wdev->wiphy,
1371 NL80211_EXT_FEATURE_BEACON_PROTECTION) ||
1372 wiphy_ext_feature_isset(
1373 wdev->wiphy,
1374 NL80211_EXT_FEATURE_BEACON_PROTECTION_CLIENT))
1375 max_key_idx = 7;
1376 for (i = 0; i <= max_key_idx; i++)
1377 rdev_del_key(rdev, dev, -1, i, false, NULL);
1378 }
1379
1380 rdev_set_qos_map(rdev, dev, NULL);
1381
1382 #ifdef CONFIG_CFG80211_WEXT
1383 memset(&wrqu, 0, sizeof(wrqu));
1384 wrqu.ap_addr.sa_family = ARPHRD_ETHER;
1385 wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL);
1386 wdev->wext.connect.ssid_len = 0;
1387 #endif
1388
1389 schedule_work(&cfg80211_disconnect_work);
1390 }
1391
cfg80211_disconnected(struct net_device * dev,u16 reason,const u8 * ie,size_t ie_len,bool locally_generated,gfp_t gfp)1392 void cfg80211_disconnected(struct net_device *dev, u16 reason,
1393 const u8 *ie, size_t ie_len,
1394 bool locally_generated, gfp_t gfp)
1395 {
1396 struct wireless_dev *wdev = dev->ieee80211_ptr;
1397 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
1398 struct cfg80211_event *ev;
1399 unsigned long flags;
1400
1401 ev = kzalloc(sizeof(*ev) + ie_len, gfp);
1402 if (!ev)
1403 return;
1404
1405 ev->type = EVENT_DISCONNECTED;
1406 ev->dc.ie = ((u8 *)ev) + sizeof(*ev);
1407 ev->dc.ie_len = ie_len;
1408 memcpy((void *)ev->dc.ie, ie, ie_len);
1409 ev->dc.reason = reason;
1410 ev->dc.locally_generated = locally_generated;
1411
1412 spin_lock_irqsave(&wdev->event_lock, flags);
1413 list_add_tail(&ev->list, &wdev->event_list);
1414 spin_unlock_irqrestore(&wdev->event_lock, flags);
1415 queue_work(cfg80211_wq, &rdev->event_work);
1416 }
1417 EXPORT_SYMBOL(cfg80211_disconnected);
1418
1419 /*
1420 * API calls for nl80211/wext compatibility code
1421 */
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)1422 int cfg80211_connect(struct cfg80211_registered_device *rdev,
1423 struct net_device *dev,
1424 struct cfg80211_connect_params *connect,
1425 struct cfg80211_cached_keys *connkeys,
1426 const u8 *prev_bssid)
1427 {
1428 struct wireless_dev *wdev = dev->ieee80211_ptr;
1429 int err;
1430
1431 ASSERT_WDEV_LOCK(wdev);
1432
1433 /*
1434 * If we have an ssid_len, we're trying to connect or are
1435 * already connected, so reject a new SSID unless it's the
1436 * same (which is the case for re-association.)
1437 */
1438 if (wdev->u.client.ssid_len &&
1439 (wdev->u.client.ssid_len != connect->ssid_len ||
1440 memcmp(wdev->u.client.ssid, connect->ssid, wdev->u.client.ssid_len)))
1441 return -EALREADY;
1442
1443 /*
1444 * If connected, reject (re-)association unless prev_bssid
1445 * matches the current BSSID.
1446 */
1447 if (wdev->connected) {
1448 if (!prev_bssid)
1449 return -EALREADY;
1450 if (!ether_addr_equal(prev_bssid,
1451 wdev->u.client.connected_addr))
1452 return -ENOTCONN;
1453 }
1454
1455 /*
1456 * Reject if we're in the process of connecting with WEP,
1457 * this case isn't very interesting and trying to handle
1458 * it would make the code much more complex.
1459 */
1460 if (wdev->connect_keys)
1461 return -EINPROGRESS;
1462
1463 cfg80211_oper_and_ht_capa(&connect->ht_capa_mask,
1464 rdev->wiphy.ht_capa_mod_mask);
1465 cfg80211_oper_and_vht_capa(&connect->vht_capa_mask,
1466 rdev->wiphy.vht_capa_mod_mask);
1467
1468 if (connkeys && connkeys->def >= 0) {
1469 int idx;
1470 u32 cipher;
1471
1472 idx = connkeys->def;
1473 cipher = connkeys->params[idx].cipher;
1474 /* If given a WEP key we may need it for shared key auth */
1475 if (cipher == WLAN_CIPHER_SUITE_WEP40 ||
1476 cipher == WLAN_CIPHER_SUITE_WEP104) {
1477 connect->key_idx = idx;
1478 connect->key = connkeys->params[idx].key;
1479 connect->key_len = connkeys->params[idx].key_len;
1480
1481 /*
1482 * If ciphers are not set (e.g. when going through
1483 * iwconfig), we have to set them appropriately here.
1484 */
1485 if (connect->crypto.cipher_group == 0)
1486 connect->crypto.cipher_group = cipher;
1487
1488 if (connect->crypto.n_ciphers_pairwise == 0) {
1489 connect->crypto.n_ciphers_pairwise = 1;
1490 connect->crypto.ciphers_pairwise[0] = cipher;
1491 }
1492 }
1493
1494 connect->crypto.wep_keys = connkeys->params;
1495 connect->crypto.wep_tx_key = connkeys->def;
1496 } else {
1497 if (WARN_ON(connkeys))
1498 return -EINVAL;
1499
1500 /* connect can point to wdev->wext.connect which
1501 * can hold key data from a previous connection
1502 */
1503 connect->key = NULL;
1504 connect->key_len = 0;
1505 connect->key_idx = 0;
1506 }
1507
1508 wdev->connect_keys = connkeys;
1509 memcpy(wdev->u.client.ssid, connect->ssid, connect->ssid_len);
1510 wdev->u.client.ssid_len = connect->ssid_len;
1511
1512 wdev->conn_bss_type = connect->pbss ? IEEE80211_BSS_TYPE_PBSS :
1513 IEEE80211_BSS_TYPE_ESS;
1514
1515 if (!rdev->ops->connect)
1516 err = cfg80211_sme_connect(wdev, connect, prev_bssid);
1517 else
1518 err = rdev_connect(rdev, dev, connect);
1519
1520 if (err) {
1521 wdev->connect_keys = NULL;
1522 /*
1523 * This could be reassoc getting refused, don't clear
1524 * ssid_len in that case.
1525 */
1526 if (!wdev->connected)
1527 wdev->u.client.ssid_len = 0;
1528 return err;
1529 }
1530
1531 return 0;
1532 }
1533
cfg80211_disconnect(struct cfg80211_registered_device * rdev,struct net_device * dev,u16 reason,bool wextev)1534 int cfg80211_disconnect(struct cfg80211_registered_device *rdev,
1535 struct net_device *dev, u16 reason, bool wextev)
1536 {
1537 struct wireless_dev *wdev = dev->ieee80211_ptr;
1538 int err = 0;
1539
1540 ASSERT_WDEV_LOCK(wdev);
1541
1542 kfree_sensitive(wdev->connect_keys);
1543 wdev->connect_keys = NULL;
1544
1545 wdev->conn_owner_nlportid = 0;
1546
1547 if (wdev->conn)
1548 err = cfg80211_sme_disconnect(wdev, reason);
1549 else if (!rdev->ops->disconnect)
1550 cfg80211_mlme_down(rdev, dev);
1551 else if (wdev->u.client.ssid_len)
1552 err = rdev_disconnect(rdev, dev, reason);
1553
1554 /*
1555 * Clear ssid_len unless we actually were fully connected,
1556 * in which case cfg80211_disconnected() will take care of
1557 * this later.
1558 */
1559 if (!wdev->connected)
1560 wdev->u.client.ssid_len = 0;
1561
1562 return err;
1563 }
1564
1565 /*
1566 * Used to clean up after the connection / connection attempt owner socket
1567 * disconnects
1568 */
cfg80211_autodisconnect_wk(struct work_struct * work)1569 void cfg80211_autodisconnect_wk(struct work_struct *work)
1570 {
1571 struct wireless_dev *wdev =
1572 container_of(work, struct wireless_dev, disconnect_wk);
1573 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
1574
1575 wdev_lock(wdev);
1576
1577 if (wdev->conn_owner_nlportid) {
1578 switch (wdev->iftype) {
1579 case NL80211_IFTYPE_ADHOC:
1580 __cfg80211_leave_ibss(rdev, wdev->netdev, false);
1581 break;
1582 case NL80211_IFTYPE_AP:
1583 case NL80211_IFTYPE_P2P_GO:
1584 __cfg80211_stop_ap(rdev, wdev->netdev, -1, false);
1585 break;
1586 case NL80211_IFTYPE_MESH_POINT:
1587 __cfg80211_leave_mesh(rdev, wdev->netdev);
1588 break;
1589 case NL80211_IFTYPE_STATION:
1590 case NL80211_IFTYPE_P2P_CLIENT:
1591 /*
1592 * Use disconnect_bssid if still connecting and
1593 * ops->disconnect not implemented. Otherwise we can
1594 * use cfg80211_disconnect.
1595 */
1596 if (rdev->ops->disconnect || wdev->connected)
1597 cfg80211_disconnect(rdev, wdev->netdev,
1598 WLAN_REASON_DEAUTH_LEAVING,
1599 true);
1600 else
1601 cfg80211_mlme_deauth(rdev, wdev->netdev,
1602 wdev->disconnect_bssid,
1603 NULL, 0,
1604 WLAN_REASON_DEAUTH_LEAVING,
1605 false);
1606 break;
1607 default:
1608 break;
1609 }
1610 }
1611
1612 wdev_unlock(wdev);
1613 }
1614