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
cfg80211_step_auth_next(struct cfg80211_conn * conn,struct cfg80211_bss * bss)288 static void cfg80211_step_auth_next(struct cfg80211_conn *conn,
289 struct cfg80211_bss *bss)
290 {
291 memcpy(conn->bssid, bss->bssid, ETH_ALEN);
292 conn->params.bssid = conn->bssid;
293 conn->params.channel = bss->channel;
294 conn->state = CFG80211_CONN_AUTHENTICATE_NEXT;
295 }
296
297 /* Returned bss is reference counted and must be cleaned up appropriately. */
cfg80211_get_conn_bss(struct wireless_dev * wdev)298 static struct cfg80211_bss *cfg80211_get_conn_bss(struct wireless_dev *wdev)
299 {
300 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
301 struct cfg80211_bss *bss;
302
303 ASSERT_WDEV_LOCK(wdev);
304
305 bss = cfg80211_get_bss(wdev->wiphy, wdev->conn->params.channel,
306 wdev->conn->params.bssid,
307 wdev->conn->params.ssid,
308 wdev->conn->params.ssid_len,
309 wdev->conn_bss_type,
310 IEEE80211_PRIVACY(wdev->conn->params.privacy));
311 if (!bss)
312 return NULL;
313
314 cfg80211_step_auth_next(wdev->conn, bss);
315 schedule_work(&rdev->conn_work);
316
317 return bss;
318 }
319
__cfg80211_sme_scan_done(struct net_device * dev)320 static void __cfg80211_sme_scan_done(struct net_device *dev)
321 {
322 struct wireless_dev *wdev = dev->ieee80211_ptr;
323 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
324 struct cfg80211_bss *bss;
325
326 ASSERT_WDEV_LOCK(wdev);
327
328 if (!wdev->conn)
329 return;
330
331 if (wdev->conn->state != CFG80211_CONN_SCANNING &&
332 wdev->conn->state != CFG80211_CONN_SCAN_AGAIN)
333 return;
334
335 bss = cfg80211_get_conn_bss(wdev);
336 if (bss)
337 cfg80211_put_bss(&rdev->wiphy, bss);
338 else
339 schedule_work(&rdev->conn_work);
340 }
341
cfg80211_sme_scan_done(struct net_device * dev)342 void cfg80211_sme_scan_done(struct net_device *dev)
343 {
344 struct wireless_dev *wdev = dev->ieee80211_ptr;
345
346 wdev_lock(wdev);
347 __cfg80211_sme_scan_done(dev);
348 wdev_unlock(wdev);
349 }
350
cfg80211_sme_rx_auth(struct wireless_dev * wdev,const u8 * buf,size_t len)351 void cfg80211_sme_rx_auth(struct wireless_dev *wdev, const u8 *buf, size_t len)
352 {
353 struct wiphy *wiphy = wdev->wiphy;
354 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
355 struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)buf;
356 u16 status_code = le16_to_cpu(mgmt->u.auth.status_code);
357
358 ASSERT_WDEV_LOCK(wdev);
359
360 if (!wdev->conn || wdev->conn->state == CFG80211_CONN_CONNECTED)
361 return;
362
363 if (status_code == WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG &&
364 wdev->conn->auto_auth &&
365 wdev->conn->params.auth_type != NL80211_AUTHTYPE_NETWORK_EAP) {
366 /* select automatically between only open, shared, leap */
367 switch (wdev->conn->params.auth_type) {
368 case NL80211_AUTHTYPE_OPEN_SYSTEM:
369 if (wdev->connect_keys)
370 wdev->conn->params.auth_type =
371 NL80211_AUTHTYPE_SHARED_KEY;
372 else
373 wdev->conn->params.auth_type =
374 NL80211_AUTHTYPE_NETWORK_EAP;
375 break;
376 case NL80211_AUTHTYPE_SHARED_KEY:
377 wdev->conn->params.auth_type =
378 NL80211_AUTHTYPE_NETWORK_EAP;
379 break;
380 default:
381 /* huh? */
382 wdev->conn->params.auth_type =
383 NL80211_AUTHTYPE_OPEN_SYSTEM;
384 break;
385 }
386 wdev->conn->state = CFG80211_CONN_AUTHENTICATE_NEXT;
387 schedule_work(&rdev->conn_work);
388 } else if (status_code != WLAN_STATUS_SUCCESS) {
389 struct cfg80211_connect_resp_params cr;
390
391 memset(&cr, 0, sizeof(cr));
392 cr.status = status_code;
393 cr.links[0].bssid = mgmt->bssid;
394 cr.timeout_reason = NL80211_TIMEOUT_UNSPECIFIED;
395 __cfg80211_connect_result(wdev->netdev, &cr, false);
396 } else if (wdev->conn->state == CFG80211_CONN_AUTHENTICATING) {
397 wdev->conn->state = CFG80211_CONN_ASSOCIATE_NEXT;
398 schedule_work(&rdev->conn_work);
399 }
400 }
401
cfg80211_sme_rx_assoc_resp(struct wireless_dev * wdev,u16 status)402 bool cfg80211_sme_rx_assoc_resp(struct wireless_dev *wdev, u16 status)
403 {
404 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
405
406 if (!wdev->conn)
407 return false;
408
409 if (status == WLAN_STATUS_SUCCESS) {
410 wdev->conn->state = CFG80211_CONN_CONNECTED;
411 return false;
412 }
413
414 if (wdev->conn->prev_bssid_valid) {
415 /*
416 * Some stupid APs don't accept reassoc, so we
417 * need to fall back to trying regular assoc;
418 * return true so no event is sent to userspace.
419 */
420 wdev->conn->prev_bssid_valid = false;
421 wdev->conn->state = CFG80211_CONN_ASSOCIATE_NEXT;
422 schedule_work(&rdev->conn_work);
423 return true;
424 }
425
426 wdev->conn->state = CFG80211_CONN_ASSOC_FAILED;
427 schedule_work(&rdev->conn_work);
428 return false;
429 }
430
cfg80211_sme_deauth(struct wireless_dev * wdev)431 void cfg80211_sme_deauth(struct wireless_dev *wdev)
432 {
433 cfg80211_sme_free(wdev);
434 }
435
cfg80211_sme_auth_timeout(struct wireless_dev * wdev)436 void cfg80211_sme_auth_timeout(struct wireless_dev *wdev)
437 {
438 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
439
440 if (!wdev->conn)
441 return;
442
443 wdev->conn->state = CFG80211_CONN_AUTH_FAILED_TIMEOUT;
444 schedule_work(&rdev->conn_work);
445 }
446
cfg80211_sme_disassoc(struct wireless_dev * wdev)447 void cfg80211_sme_disassoc(struct wireless_dev *wdev)
448 {
449 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
450
451 if (!wdev->conn)
452 return;
453
454 wdev->conn->state = CFG80211_CONN_DEAUTH;
455 schedule_work(&rdev->conn_work);
456 }
457
cfg80211_sme_assoc_timeout(struct wireless_dev * wdev)458 void cfg80211_sme_assoc_timeout(struct wireless_dev *wdev)
459 {
460 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
461
462 if (!wdev->conn)
463 return;
464
465 wdev->conn->state = CFG80211_CONN_ASSOC_FAILED_TIMEOUT;
466 schedule_work(&rdev->conn_work);
467 }
468
cfg80211_sme_abandon_assoc(struct wireless_dev * wdev)469 void cfg80211_sme_abandon_assoc(struct wireless_dev *wdev)
470 {
471 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
472
473 if (!wdev->conn)
474 return;
475
476 wdev->conn->state = CFG80211_CONN_ABANDON;
477 schedule_work(&rdev->conn_work);
478 }
479
cfg80211_wdev_release_bsses(struct wireless_dev * wdev)480 static void cfg80211_wdev_release_bsses(struct wireless_dev *wdev)
481 {
482 unsigned int link;
483
484 for_each_valid_link(wdev, link) {
485 if (!wdev->links[link].client.current_bss)
486 continue;
487 cfg80211_unhold_bss(wdev->links[link].client.current_bss);
488 cfg80211_put_bss(wdev->wiphy,
489 &wdev->links[link].client.current_bss->pub);
490 wdev->links[link].client.current_bss = NULL;
491 }
492 }
493
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)494 static int cfg80211_sme_get_conn_ies(struct wireless_dev *wdev,
495 const u8 *ies, size_t ies_len,
496 const u8 **out_ies, size_t *out_ies_len)
497 {
498 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
499 u8 *buf;
500 size_t offs;
501
502 if (!rdev->wiphy.extended_capabilities_len ||
503 (ies && cfg80211_find_ie(WLAN_EID_EXT_CAPABILITY, ies, ies_len))) {
504 *out_ies = kmemdup(ies, ies_len, GFP_KERNEL);
505 if (!*out_ies)
506 return -ENOMEM;
507 *out_ies_len = ies_len;
508 return 0;
509 }
510
511 buf = kmalloc(ies_len + rdev->wiphy.extended_capabilities_len + 2,
512 GFP_KERNEL);
513 if (!buf)
514 return -ENOMEM;
515
516 if (ies_len) {
517 static const u8 before_extcapa[] = {
518 /* not listing IEs expected to be created by driver */
519 WLAN_EID_RSN,
520 WLAN_EID_QOS_CAPA,
521 WLAN_EID_RRM_ENABLED_CAPABILITIES,
522 WLAN_EID_MOBILITY_DOMAIN,
523 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
524 WLAN_EID_BSS_COEX_2040,
525 };
526
527 offs = ieee80211_ie_split(ies, ies_len, before_extcapa,
528 ARRAY_SIZE(before_extcapa), 0);
529 memcpy(buf, ies, offs);
530 /* leave a whole for extended capabilities IE */
531 memcpy(buf + offs + rdev->wiphy.extended_capabilities_len + 2,
532 ies + offs, ies_len - offs);
533 } else {
534 offs = 0;
535 }
536
537 /* place extended capabilities IE (with only driver capabilities) */
538 buf[offs] = WLAN_EID_EXT_CAPABILITY;
539 buf[offs + 1] = rdev->wiphy.extended_capabilities_len;
540 memcpy(buf + offs + 2,
541 rdev->wiphy.extended_capabilities,
542 rdev->wiphy.extended_capabilities_len);
543
544 *out_ies = buf;
545 *out_ies_len = ies_len + rdev->wiphy.extended_capabilities_len + 2;
546
547 return 0;
548 }
549
cfg80211_sme_connect(struct wireless_dev * wdev,struct cfg80211_connect_params * connect,const u8 * prev_bssid)550 static int cfg80211_sme_connect(struct wireless_dev *wdev,
551 struct cfg80211_connect_params *connect,
552 const u8 *prev_bssid)
553 {
554 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
555 struct cfg80211_bss *bss;
556 int err;
557
558 if (!rdev->ops->auth || !rdev->ops->assoc)
559 return -EOPNOTSUPP;
560
561 cfg80211_wdev_release_bsses(wdev);
562
563 if (wdev->connected) {
564 cfg80211_sme_free(wdev);
565 wdev->connected = false;
566 }
567
568 if (wdev->conn)
569 return -EINPROGRESS;
570
571 wdev->conn = kzalloc(sizeof(*wdev->conn), GFP_KERNEL);
572 if (!wdev->conn)
573 return -ENOMEM;
574
575 /*
576 * Copy all parameters, and treat explicitly IEs, BSSID, SSID.
577 */
578 memcpy(&wdev->conn->params, connect, sizeof(*connect));
579 if (connect->bssid) {
580 wdev->conn->params.bssid = wdev->conn->bssid;
581 memcpy(wdev->conn->bssid, connect->bssid, ETH_ALEN);
582 }
583
584 if (cfg80211_sme_get_conn_ies(wdev, connect->ie, connect->ie_len,
585 &wdev->conn->ie,
586 &wdev->conn->params.ie_len)) {
587 kfree(wdev->conn);
588 wdev->conn = NULL;
589 return -ENOMEM;
590 }
591 wdev->conn->params.ie = wdev->conn->ie;
592
593 if (connect->auth_type == NL80211_AUTHTYPE_AUTOMATIC) {
594 wdev->conn->auto_auth = true;
595 /* start with open system ... should mostly work */
596 wdev->conn->params.auth_type =
597 NL80211_AUTHTYPE_OPEN_SYSTEM;
598 } else {
599 wdev->conn->auto_auth = false;
600 }
601
602 wdev->conn->params.ssid = wdev->u.client.ssid;
603 wdev->conn->params.ssid_len = wdev->u.client.ssid_len;
604
605 /* see if we have the bss already */
606 bss = cfg80211_get_bss(wdev->wiphy, wdev->conn->params.channel,
607 wdev->conn->params.bssid,
608 wdev->conn->params.ssid,
609 wdev->conn->params.ssid_len,
610 wdev->conn_bss_type,
611 IEEE80211_PRIVACY(wdev->conn->params.privacy));
612
613 if (prev_bssid) {
614 memcpy(wdev->conn->prev_bssid, prev_bssid, ETH_ALEN);
615 wdev->conn->prev_bssid_valid = true;
616 }
617
618 /* we're good if we have a matching bss struct */
619 if (bss) {
620 enum nl80211_timeout_reason treason;
621
622 cfg80211_step_auth_next(wdev->conn, bss);
623 err = cfg80211_conn_do_work(wdev, &treason);
624 cfg80211_put_bss(wdev->wiphy, bss);
625 } else {
626 /* otherwise we'll need to scan for the AP first */
627 err = cfg80211_conn_scan(wdev);
628
629 /*
630 * If we can't scan right now, then we need to scan again
631 * after the current scan finished, since the parameters
632 * changed (unless we find a good AP anyway).
633 */
634 if (err == -EBUSY) {
635 err = 0;
636 wdev->conn->state = CFG80211_CONN_SCAN_AGAIN;
637 }
638 }
639
640 if (err)
641 cfg80211_sme_free(wdev);
642
643 return err;
644 }
645
cfg80211_sme_disconnect(struct wireless_dev * wdev,u16 reason)646 static int cfg80211_sme_disconnect(struct wireless_dev *wdev, u16 reason)
647 {
648 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
649 int err;
650
651 if (!wdev->conn)
652 return 0;
653
654 if (!rdev->ops->deauth)
655 return -EOPNOTSUPP;
656
657 if (wdev->conn->state == CFG80211_CONN_SCANNING ||
658 wdev->conn->state == CFG80211_CONN_SCAN_AGAIN) {
659 err = 0;
660 goto out;
661 }
662
663 /* wdev->conn->params.bssid must be set if > SCANNING */
664 err = cfg80211_mlme_deauth(rdev, wdev->netdev,
665 wdev->conn->params.bssid,
666 NULL, 0, reason, false);
667 out:
668 cfg80211_sme_free(wdev);
669 return err;
670 }
671
672 /*
673 * code shared for in-device and software SME
674 */
675
cfg80211_is_all_idle(void)676 static bool cfg80211_is_all_idle(void)
677 {
678 struct cfg80211_registered_device *rdev;
679 struct wireless_dev *wdev;
680 bool is_all_idle = true;
681
682 /*
683 * All devices must be idle as otherwise if you are actively
684 * scanning some new beacon hints could be learned and would
685 * count as new regulatory hints.
686 * Also if there is any other active beaconing interface we
687 * need not issue a disconnect hint and reset any info such
688 * as chan dfs state, etc.
689 */
690 list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
691 list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) {
692 wdev_lock(wdev);
693 if (wdev->conn || wdev->connected ||
694 cfg80211_beaconing_iface_active(wdev))
695 is_all_idle = false;
696 wdev_unlock(wdev);
697 }
698 }
699
700 return is_all_idle;
701 }
702
disconnect_work(struct work_struct * work)703 static void disconnect_work(struct work_struct *work)
704 {
705 rtnl_lock();
706 if (cfg80211_is_all_idle())
707 regulatory_hint_disconnect();
708 rtnl_unlock();
709 }
710
711 DECLARE_WORK(cfg80211_disconnect_work, disconnect_work);
712
713 static void
cfg80211_connect_result_release_bsses(struct wireless_dev * wdev,struct cfg80211_connect_resp_params * cr)714 cfg80211_connect_result_release_bsses(struct wireless_dev *wdev,
715 struct cfg80211_connect_resp_params *cr)
716 {
717 unsigned int link;
718
719 for_each_valid_link(cr, link) {
720 if (!cr->links[link].bss)
721 continue;
722 cfg80211_unhold_bss(bss_from_pub(cr->links[link].bss));
723 cfg80211_put_bss(wdev->wiphy, cr->links[link].bss);
724 }
725 }
726
727 /*
728 * API calls for drivers implementing connect/disconnect and
729 * SME event handling
730 */
731
732 /* This method must consume bss one way or another */
__cfg80211_connect_result(struct net_device * dev,struct cfg80211_connect_resp_params * cr,bool wextev)733 void __cfg80211_connect_result(struct net_device *dev,
734 struct cfg80211_connect_resp_params *cr,
735 bool wextev)
736 {
737 struct wireless_dev *wdev = dev->ieee80211_ptr;
738 const struct element *country_elem = NULL;
739 const struct element *ssid;
740 const u8 *country_data;
741 u8 country_datalen;
742 #ifdef CONFIG_CFG80211_WEXT
743 union iwreq_data wrqu;
744 #endif
745 unsigned int link;
746 const u8 *connected_addr;
747 bool bss_not_found = false;
748
749 ASSERT_WDEV_LOCK(wdev);
750
751 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION &&
752 wdev->iftype != NL80211_IFTYPE_P2P_CLIENT))
753 goto out;
754
755 if (cr->valid_links) {
756 if (WARN_ON(!cr->ap_mld_addr))
757 goto out;
758
759 for_each_valid_link(cr, link) {
760 if (WARN_ON(!cr->links[link].addr))
761 goto out;
762 }
763
764 if (WARN_ON(wdev->connect_keys))
765 goto out;
766 }
767
768 wdev->unprot_beacon_reported = 0;
769 nl80211_send_connect_result(wiphy_to_rdev(wdev->wiphy), dev, cr,
770 GFP_KERNEL);
771 connected_addr = cr->valid_links ? cr->ap_mld_addr : cr->links[0].bssid;
772
773 #ifdef CONFIG_CFG80211_WEXT
774 if (wextev && !cr->valid_links) {
775 if (cr->req_ie && cr->status == WLAN_STATUS_SUCCESS) {
776 memset(&wrqu, 0, sizeof(wrqu));
777 wrqu.data.length = cr->req_ie_len;
778 wireless_send_event(dev, IWEVASSOCREQIE, &wrqu,
779 cr->req_ie);
780 }
781
782 if (cr->resp_ie && cr->status == WLAN_STATUS_SUCCESS) {
783 memset(&wrqu, 0, sizeof(wrqu));
784 wrqu.data.length = cr->resp_ie_len;
785 wireless_send_event(dev, IWEVASSOCRESPIE, &wrqu,
786 cr->resp_ie);
787 }
788
789 memset(&wrqu, 0, sizeof(wrqu));
790 wrqu.ap_addr.sa_family = ARPHRD_ETHER;
791 if (connected_addr && cr->status == WLAN_STATUS_SUCCESS) {
792 memcpy(wrqu.ap_addr.sa_data, connected_addr, ETH_ALEN);
793 memcpy(wdev->wext.prev_bssid, connected_addr, ETH_ALEN);
794 wdev->wext.prev_bssid_valid = true;
795 }
796 wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL);
797 }
798 #endif
799
800 if (cr->status == WLAN_STATUS_SUCCESS) {
801 if (!wiphy_to_rdev(wdev->wiphy)->ops->connect) {
802 for_each_valid_link(cr, link) {
803 if (WARN_ON_ONCE(!cr->links[link].bss))
804 break;
805 }
806 }
807
808 for_each_valid_link(cr, link) {
809 if (cr->links[link].bss)
810 continue;
811
812 cr->links[link].bss =
813 cfg80211_get_bss(wdev->wiphy, NULL,
814 cr->links[link].bssid,
815 wdev->u.client.ssid,
816 wdev->u.client.ssid_len,
817 wdev->conn_bss_type,
818 IEEE80211_PRIVACY_ANY);
819 if (!cr->links[link].bss) {
820 bss_not_found = true;
821 break;
822 }
823 cfg80211_hold_bss(bss_from_pub(cr->links[link].bss));
824 }
825 }
826
827 cfg80211_wdev_release_bsses(wdev);
828
829 if (cr->status != WLAN_STATUS_SUCCESS) {
830 kfree_sensitive(wdev->connect_keys);
831 wdev->connect_keys = NULL;
832 wdev->u.client.ssid_len = 0;
833 wdev->conn_owner_nlportid = 0;
834 cfg80211_connect_result_release_bsses(wdev, cr);
835 cfg80211_sme_free(wdev);
836 return;
837 }
838
839 if (WARN_ON(bss_not_found)) {
840 cfg80211_connect_result_release_bsses(wdev, cr);
841 return;
842 }
843
844 memset(wdev->links, 0, sizeof(wdev->links));
845 wdev->valid_links = cr->valid_links;
846 for_each_valid_link(cr, link)
847 wdev->links[link].client.current_bss =
848 bss_from_pub(cr->links[link].bss);
849 wdev->connected = true;
850 ether_addr_copy(wdev->u.client.connected_addr, connected_addr);
851 if (cr->valid_links) {
852 for_each_valid_link(cr, link)
853 memcpy(wdev->links[link].addr, cr->links[link].addr,
854 ETH_ALEN);
855 }
856
857 if (!(wdev->wiphy->flags & WIPHY_FLAG_HAS_STATIC_WEP))
858 cfg80211_upload_connect_keys(wdev);
859
860 rcu_read_lock();
861 for_each_valid_link(cr, link) {
862 country_elem =
863 ieee80211_bss_get_elem(cr->links[link].bss,
864 WLAN_EID_COUNTRY);
865 if (country_elem)
866 break;
867 }
868 if (!country_elem) {
869 rcu_read_unlock();
870 return;
871 }
872
873 country_datalen = country_elem->datalen;
874 country_data = kmemdup(country_elem->data, country_datalen, GFP_ATOMIC);
875 rcu_read_unlock();
876
877 if (!country_data)
878 return;
879
880 regulatory_hint_country_ie(wdev->wiphy,
881 cr->links[link].bss->channel->band,
882 country_data, country_datalen);
883 kfree(country_data);
884
885 if (!wdev->u.client.ssid_len) {
886 rcu_read_lock();
887 for_each_valid_link(cr, link) {
888 ssid = ieee80211_bss_get_elem(cr->links[link].bss,
889 WLAN_EID_SSID);
890
891 if (!ssid || !ssid->datalen)
892 continue;
893
894 memcpy(wdev->u.client.ssid, ssid->data, ssid->datalen);
895 wdev->u.client.ssid_len = ssid->datalen;
896 break;
897 }
898 rcu_read_unlock();
899 }
900
901 return;
902 out:
903 for_each_valid_link(cr, link)
904 cfg80211_put_bss(wdev->wiphy, cr->links[link].bss);
905 }
906
cfg80211_update_link_bss(struct wireless_dev * wdev,struct cfg80211_bss ** bss)907 static void cfg80211_update_link_bss(struct wireless_dev *wdev,
908 struct cfg80211_bss **bss)
909 {
910 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
911 struct cfg80211_internal_bss *ibss;
912
913 if (!*bss)
914 return;
915
916 ibss = bss_from_pub(*bss);
917 if (list_empty(&ibss->list)) {
918 struct cfg80211_bss *found = NULL, *tmp = *bss;
919
920 found = cfg80211_get_bss(wdev->wiphy, NULL,
921 (*bss)->bssid,
922 wdev->u.client.ssid,
923 wdev->u.client.ssid_len,
924 wdev->conn_bss_type,
925 IEEE80211_PRIVACY_ANY);
926 if (found) {
927 /* The same BSS is already updated so use it
928 * instead, as it has latest info.
929 */
930 *bss = found;
931 } else {
932 /* Update with BSS provided by driver, it will
933 * be freshly added and ref cnted, we can free
934 * the old one.
935 *
936 * signal_valid can be false, as we are not
937 * expecting the BSS to be found.
938 *
939 * keep the old timestamp to avoid confusion
940 */
941 cfg80211_bss_update(rdev, ibss, false,
942 ibss->ts);
943 }
944
945 cfg80211_put_bss(wdev->wiphy, tmp);
946 }
947 }
948
949 /* Consumes bss object(s) one way or another */
cfg80211_connect_done(struct net_device * dev,struct cfg80211_connect_resp_params * params,gfp_t gfp)950 void cfg80211_connect_done(struct net_device *dev,
951 struct cfg80211_connect_resp_params *params,
952 gfp_t gfp)
953 {
954 struct wireless_dev *wdev = dev->ieee80211_ptr;
955 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
956 struct cfg80211_event *ev;
957 unsigned long flags;
958 u8 *next;
959 size_t link_info_size = 0;
960 unsigned int link;
961
962 for_each_valid_link(params, link) {
963 cfg80211_update_link_bss(wdev, ¶ms->links[link].bss);
964 link_info_size += params->links[link].bssid ? ETH_ALEN : 0;
965 link_info_size += params->links[link].addr ? ETH_ALEN : 0;
966 }
967
968 ev = kzalloc(sizeof(*ev) + (params->ap_mld_addr ? ETH_ALEN : 0) +
969 params->req_ie_len + params->resp_ie_len +
970 params->fils.kek_len + params->fils.pmk_len +
971 (params->fils.pmkid ? WLAN_PMKID_LEN : 0) + link_info_size,
972 gfp);
973
974 if (!ev) {
975 for_each_valid_link(params, link)
976 cfg80211_put_bss(wdev->wiphy,
977 params->links[link].bss);
978 return;
979 }
980
981 ev->type = EVENT_CONNECT_RESULT;
982 next = ((u8 *)ev) + sizeof(*ev);
983 if (params->ap_mld_addr) {
984 ev->cr.ap_mld_addr = next;
985 memcpy((void *)ev->cr.ap_mld_addr, params->ap_mld_addr,
986 ETH_ALEN);
987 next += ETH_ALEN;
988 }
989 if (params->req_ie_len) {
990 ev->cr.req_ie = next;
991 ev->cr.req_ie_len = params->req_ie_len;
992 memcpy((void *)ev->cr.req_ie, params->req_ie,
993 params->req_ie_len);
994 next += params->req_ie_len;
995 }
996 if (params->resp_ie_len) {
997 ev->cr.resp_ie = next;
998 ev->cr.resp_ie_len = params->resp_ie_len;
999 memcpy((void *)ev->cr.resp_ie, params->resp_ie,
1000 params->resp_ie_len);
1001 next += params->resp_ie_len;
1002 }
1003 if (params->fils.kek_len) {
1004 ev->cr.fils.kek = next;
1005 ev->cr.fils.kek_len = params->fils.kek_len;
1006 memcpy((void *)ev->cr.fils.kek, params->fils.kek,
1007 params->fils.kek_len);
1008 next += params->fils.kek_len;
1009 }
1010 if (params->fils.pmk_len) {
1011 ev->cr.fils.pmk = next;
1012 ev->cr.fils.pmk_len = params->fils.pmk_len;
1013 memcpy((void *)ev->cr.fils.pmk, params->fils.pmk,
1014 params->fils.pmk_len);
1015 next += params->fils.pmk_len;
1016 }
1017 if (params->fils.pmkid) {
1018 ev->cr.fils.pmkid = next;
1019 memcpy((void *)ev->cr.fils.pmkid, params->fils.pmkid,
1020 WLAN_PMKID_LEN);
1021 next += WLAN_PMKID_LEN;
1022 }
1023 ev->cr.fils.update_erp_next_seq_num = params->fils.update_erp_next_seq_num;
1024 if (params->fils.update_erp_next_seq_num)
1025 ev->cr.fils.erp_next_seq_num = params->fils.erp_next_seq_num;
1026 ev->cr.valid_links = params->valid_links;
1027 for_each_valid_link(params, link) {
1028 if (params->links[link].bss)
1029 cfg80211_hold_bss(
1030 bss_from_pub(params->links[link].bss));
1031 ev->cr.links[link].bss = params->links[link].bss;
1032
1033 if (params->links[link].addr) {
1034 ev->cr.links[link].addr = next;
1035 memcpy((void *)ev->cr.links[link].addr,
1036 params->links[link].addr,
1037 ETH_ALEN);
1038 next += ETH_ALEN;
1039 }
1040 if (params->links[link].bssid) {
1041 ev->cr.links[link].bssid = next;
1042 memcpy((void *)ev->cr.links[link].bssid,
1043 params->links[link].bssid,
1044 ETH_ALEN);
1045 next += ETH_ALEN;
1046 }
1047 }
1048 ev->cr.status = params->status;
1049 ev->cr.timeout_reason = params->timeout_reason;
1050
1051 spin_lock_irqsave(&wdev->event_lock, flags);
1052 list_add_tail(&ev->list, &wdev->event_list);
1053 spin_unlock_irqrestore(&wdev->event_lock, flags);
1054 queue_work(cfg80211_wq, &rdev->event_work);
1055 }
1056 EXPORT_SYMBOL(cfg80211_connect_done);
1057
1058 /* Consumes bss object one way or another */
__cfg80211_roamed(struct wireless_dev * wdev,struct cfg80211_roam_info * info)1059 void __cfg80211_roamed(struct wireless_dev *wdev,
1060 struct cfg80211_roam_info *info)
1061 {
1062 #ifdef CONFIG_CFG80211_WEXT
1063 union iwreq_data wrqu;
1064 #endif
1065 unsigned int link;
1066 const u8 *connected_addr;
1067
1068 ASSERT_WDEV_LOCK(wdev);
1069
1070 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION &&
1071 wdev->iftype != NL80211_IFTYPE_P2P_CLIENT))
1072 goto out;
1073
1074 if (WARN_ON(!wdev->connected))
1075 goto out;
1076
1077 if (info->valid_links) {
1078 if (WARN_ON(!info->ap_mld_addr))
1079 goto out;
1080
1081 for_each_valid_link(info, link) {
1082 if (WARN_ON(!info->links[link].addr))
1083 goto out;
1084 }
1085 }
1086
1087 cfg80211_wdev_release_bsses(wdev);
1088
1089 for_each_valid_link(info, link) {
1090 if (WARN_ON(!info->links[link].bss))
1091 goto out;
1092 }
1093
1094 memset(wdev->links, 0, sizeof(wdev->links));
1095 wdev->valid_links = info->valid_links;
1096 for_each_valid_link(info, link) {
1097 cfg80211_hold_bss(bss_from_pub(info->links[link].bss));
1098 wdev->links[link].client.current_bss =
1099 bss_from_pub(info->links[link].bss);
1100 }
1101
1102 connected_addr = info->valid_links ?
1103 info->ap_mld_addr :
1104 info->links[0].bss->bssid;
1105 ether_addr_copy(wdev->u.client.connected_addr, connected_addr);
1106 if (info->valid_links) {
1107 for_each_valid_link(info, link)
1108 memcpy(wdev->links[link].addr, info->links[link].addr,
1109 ETH_ALEN);
1110 }
1111 wdev->unprot_beacon_reported = 0;
1112 nl80211_send_roamed(wiphy_to_rdev(wdev->wiphy),
1113 wdev->netdev, info, GFP_KERNEL);
1114
1115 #ifdef CONFIG_CFG80211_WEXT
1116 if (!info->valid_links) {
1117 if (info->req_ie) {
1118 memset(&wrqu, 0, sizeof(wrqu));
1119 wrqu.data.length = info->req_ie_len;
1120 wireless_send_event(wdev->netdev, IWEVASSOCREQIE,
1121 &wrqu, info->req_ie);
1122 }
1123
1124 if (info->resp_ie) {
1125 memset(&wrqu, 0, sizeof(wrqu));
1126 wrqu.data.length = info->resp_ie_len;
1127 wireless_send_event(wdev->netdev, IWEVASSOCRESPIE,
1128 &wrqu, info->resp_ie);
1129 }
1130
1131 memset(&wrqu, 0, sizeof(wrqu));
1132 wrqu.ap_addr.sa_family = ARPHRD_ETHER;
1133 memcpy(wrqu.ap_addr.sa_data, connected_addr, ETH_ALEN);
1134 memcpy(wdev->wext.prev_bssid, connected_addr, ETH_ALEN);
1135 wdev->wext.prev_bssid_valid = true;
1136 wireless_send_event(wdev->netdev, SIOCGIWAP, &wrqu, NULL);
1137 }
1138 #endif
1139
1140 return;
1141 out:
1142 for_each_valid_link(info, link)
1143 cfg80211_put_bss(wdev->wiphy, info->links[link].bss);
1144 }
1145
1146 /* Consumes info->links.bss object(s) one way or another */
cfg80211_roamed(struct net_device * dev,struct cfg80211_roam_info * info,gfp_t gfp)1147 void cfg80211_roamed(struct net_device *dev, struct cfg80211_roam_info *info,
1148 gfp_t gfp)
1149 {
1150 struct wireless_dev *wdev = dev->ieee80211_ptr;
1151 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
1152 struct cfg80211_event *ev;
1153 unsigned long flags;
1154 u8 *next;
1155 unsigned int link;
1156 size_t link_info_size = 0;
1157 bool bss_not_found = false;
1158
1159 for_each_valid_link(info, link) {
1160 link_info_size += info->links[link].addr ? ETH_ALEN : 0;
1161 link_info_size += info->links[link].bssid ? ETH_ALEN : 0;
1162
1163 if (info->links[link].bss)
1164 continue;
1165
1166 info->links[link].bss =
1167 cfg80211_get_bss(wdev->wiphy,
1168 info->links[link].channel,
1169 info->links[link].bssid,
1170 wdev->u.client.ssid,
1171 wdev->u.client.ssid_len,
1172 wdev->conn_bss_type,
1173 IEEE80211_PRIVACY_ANY);
1174
1175 if (!info->links[link].bss) {
1176 bss_not_found = true;
1177 break;
1178 }
1179 }
1180
1181 if (WARN_ON(bss_not_found))
1182 goto out;
1183
1184 ev = kzalloc(sizeof(*ev) + info->req_ie_len + info->resp_ie_len +
1185 info->fils.kek_len + info->fils.pmk_len +
1186 (info->fils.pmkid ? WLAN_PMKID_LEN : 0) +
1187 (info->ap_mld_addr ? ETH_ALEN : 0) + link_info_size, gfp);
1188 if (!ev)
1189 goto out;
1190
1191 ev->type = EVENT_ROAMED;
1192 next = ((u8 *)ev) + sizeof(*ev);
1193 if (info->req_ie_len) {
1194 ev->rm.req_ie = next;
1195 ev->rm.req_ie_len = info->req_ie_len;
1196 memcpy((void *)ev->rm.req_ie, info->req_ie, info->req_ie_len);
1197 next += info->req_ie_len;
1198 }
1199 if (info->resp_ie_len) {
1200 ev->rm.resp_ie = next;
1201 ev->rm.resp_ie_len = info->resp_ie_len;
1202 memcpy((void *)ev->rm.resp_ie, info->resp_ie,
1203 info->resp_ie_len);
1204 next += info->resp_ie_len;
1205 }
1206 if (info->fils.kek_len) {
1207 ev->rm.fils.kek = next;
1208 ev->rm.fils.kek_len = info->fils.kek_len;
1209 memcpy((void *)ev->rm.fils.kek, info->fils.kek,
1210 info->fils.kek_len);
1211 next += info->fils.kek_len;
1212 }
1213 if (info->fils.pmk_len) {
1214 ev->rm.fils.pmk = next;
1215 ev->rm.fils.pmk_len = info->fils.pmk_len;
1216 memcpy((void *)ev->rm.fils.pmk, info->fils.pmk,
1217 info->fils.pmk_len);
1218 next += info->fils.pmk_len;
1219 }
1220 if (info->fils.pmkid) {
1221 ev->rm.fils.pmkid = next;
1222 memcpy((void *)ev->rm.fils.pmkid, info->fils.pmkid,
1223 WLAN_PMKID_LEN);
1224 next += WLAN_PMKID_LEN;
1225 }
1226 ev->rm.fils.update_erp_next_seq_num = info->fils.update_erp_next_seq_num;
1227 if (info->fils.update_erp_next_seq_num)
1228 ev->rm.fils.erp_next_seq_num = info->fils.erp_next_seq_num;
1229 if (info->ap_mld_addr) {
1230 ev->rm.ap_mld_addr = next;
1231 memcpy((void *)ev->rm.ap_mld_addr, info->ap_mld_addr,
1232 ETH_ALEN);
1233 next += ETH_ALEN;
1234 }
1235 ev->rm.valid_links = info->valid_links;
1236 for_each_valid_link(info, link) {
1237 ev->rm.links[link].bss = info->links[link].bss;
1238
1239 if (info->links[link].addr) {
1240 ev->rm.links[link].addr = next;
1241 memcpy((void *)ev->rm.links[link].addr,
1242 info->links[link].addr,
1243 ETH_ALEN);
1244 next += ETH_ALEN;
1245 }
1246
1247 if (info->links[link].bssid) {
1248 ev->rm.links[link].bssid = next;
1249 memcpy((void *)ev->rm.links[link].bssid,
1250 info->links[link].bssid,
1251 ETH_ALEN);
1252 next += ETH_ALEN;
1253 }
1254 }
1255
1256 spin_lock_irqsave(&wdev->event_lock, flags);
1257 list_add_tail(&ev->list, &wdev->event_list);
1258 spin_unlock_irqrestore(&wdev->event_lock, flags);
1259 queue_work(cfg80211_wq, &rdev->event_work);
1260
1261 return;
1262 out:
1263 for_each_valid_link(info, link)
1264 cfg80211_put_bss(wdev->wiphy, info->links[link].bss);
1265
1266 }
1267 EXPORT_SYMBOL(cfg80211_roamed);
1268
__cfg80211_port_authorized(struct wireless_dev * wdev,const u8 * bssid,const u8 * td_bitmap,u8 td_bitmap_len)1269 void __cfg80211_port_authorized(struct wireless_dev *wdev, const u8 *bssid,
1270 const u8 *td_bitmap, u8 td_bitmap_len)
1271 {
1272 ASSERT_WDEV_LOCK(wdev);
1273
1274 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION &&
1275 wdev->iftype != NL80211_IFTYPE_P2P_CLIENT))
1276 return;
1277
1278 if (WARN_ON(!wdev->connected) ||
1279 WARN_ON(!ether_addr_equal(wdev->u.client.connected_addr, bssid)))
1280 return;
1281
1282 nl80211_send_port_authorized(wiphy_to_rdev(wdev->wiphy), wdev->netdev,
1283 bssid, td_bitmap, td_bitmap_len);
1284 }
1285
cfg80211_port_authorized(struct net_device * dev,const u8 * bssid,const u8 * td_bitmap,u8 td_bitmap_len,gfp_t gfp)1286 void cfg80211_port_authorized(struct net_device *dev, const u8 *bssid,
1287 const u8 *td_bitmap, u8 td_bitmap_len, gfp_t gfp)
1288 {
1289 struct wireless_dev *wdev = dev->ieee80211_ptr;
1290 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
1291 struct cfg80211_event *ev;
1292 unsigned long flags;
1293
1294 if (WARN_ON(!bssid))
1295 return;
1296
1297 ev = kzalloc(sizeof(*ev) + td_bitmap_len, gfp);
1298 if (!ev)
1299 return;
1300
1301 ev->type = EVENT_PORT_AUTHORIZED;
1302 memcpy(ev->pa.bssid, bssid, ETH_ALEN);
1303 ev->pa.td_bitmap = ((u8 *)ev) + sizeof(*ev);
1304 ev->pa.td_bitmap_len = td_bitmap_len;
1305 memcpy((void *)ev->pa.td_bitmap, td_bitmap, td_bitmap_len);
1306
1307 /*
1308 * Use the wdev event list so that if there are pending
1309 * connected/roamed events, they will be reported first.
1310 */
1311 spin_lock_irqsave(&wdev->event_lock, flags);
1312 list_add_tail(&ev->list, &wdev->event_list);
1313 spin_unlock_irqrestore(&wdev->event_lock, flags);
1314 queue_work(cfg80211_wq, &rdev->event_work);
1315 }
1316 EXPORT_SYMBOL(cfg80211_port_authorized);
1317
__cfg80211_disconnected(struct net_device * dev,const u8 * ie,size_t ie_len,u16 reason,bool from_ap)1318 void __cfg80211_disconnected(struct net_device *dev, const u8 *ie,
1319 size_t ie_len, u16 reason, bool from_ap)
1320 {
1321 struct wireless_dev *wdev = dev->ieee80211_ptr;
1322 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
1323 int i;
1324 #ifdef CONFIG_CFG80211_WEXT
1325 union iwreq_data wrqu;
1326 #endif
1327
1328 ASSERT_WDEV_LOCK(wdev);
1329
1330 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION &&
1331 wdev->iftype != NL80211_IFTYPE_P2P_CLIENT))
1332 return;
1333
1334 cfg80211_wdev_release_bsses(wdev);
1335 wdev->connected = false;
1336 wdev->u.client.ssid_len = 0;
1337 wdev->conn_owner_nlportid = 0;
1338 kfree_sensitive(wdev->connect_keys);
1339 wdev->connect_keys = NULL;
1340
1341 nl80211_send_disconnected(rdev, dev, reason, ie, ie_len, from_ap);
1342
1343 /* stop critical protocol if supported */
1344 if (rdev->ops->crit_proto_stop && rdev->crit_proto_nlportid) {
1345 rdev->crit_proto_nlportid = 0;
1346 rdev_crit_proto_stop(rdev, wdev);
1347 }
1348
1349 /*
1350 * Delete all the keys ... pairwise keys can't really
1351 * exist any more anyway, but default keys might.
1352 */
1353 if (rdev->ops->del_key) {
1354 int max_key_idx = 5;
1355
1356 if (wiphy_ext_feature_isset(
1357 wdev->wiphy,
1358 NL80211_EXT_FEATURE_BEACON_PROTECTION) ||
1359 wiphy_ext_feature_isset(
1360 wdev->wiphy,
1361 NL80211_EXT_FEATURE_BEACON_PROTECTION_CLIENT))
1362 max_key_idx = 7;
1363 for (i = 0; i <= max_key_idx; i++)
1364 rdev_del_key(rdev, dev, -1, i, false, NULL);
1365 }
1366
1367 rdev_set_qos_map(rdev, dev, NULL);
1368
1369 #ifdef CONFIG_CFG80211_WEXT
1370 memset(&wrqu, 0, sizeof(wrqu));
1371 wrqu.ap_addr.sa_family = ARPHRD_ETHER;
1372 wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL);
1373 wdev->wext.connect.ssid_len = 0;
1374 #endif
1375
1376 schedule_work(&cfg80211_disconnect_work);
1377 }
1378
cfg80211_disconnected(struct net_device * dev,u16 reason,const u8 * ie,size_t ie_len,bool locally_generated,gfp_t gfp)1379 void cfg80211_disconnected(struct net_device *dev, u16 reason,
1380 const u8 *ie, size_t ie_len,
1381 bool locally_generated, gfp_t gfp)
1382 {
1383 struct wireless_dev *wdev = dev->ieee80211_ptr;
1384 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
1385 struct cfg80211_event *ev;
1386 unsigned long flags;
1387
1388 ev = kzalloc(sizeof(*ev) + ie_len, gfp);
1389 if (!ev)
1390 return;
1391
1392 ev->type = EVENT_DISCONNECTED;
1393 ev->dc.ie = ((u8 *)ev) + sizeof(*ev);
1394 ev->dc.ie_len = ie_len;
1395 memcpy((void *)ev->dc.ie, ie, ie_len);
1396 ev->dc.reason = reason;
1397 ev->dc.locally_generated = locally_generated;
1398
1399 spin_lock_irqsave(&wdev->event_lock, flags);
1400 list_add_tail(&ev->list, &wdev->event_list);
1401 spin_unlock_irqrestore(&wdev->event_lock, flags);
1402 queue_work(cfg80211_wq, &rdev->event_work);
1403 }
1404 EXPORT_SYMBOL(cfg80211_disconnected);
1405
1406 /*
1407 * API calls for nl80211/wext compatibility code
1408 */
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)1409 int cfg80211_connect(struct cfg80211_registered_device *rdev,
1410 struct net_device *dev,
1411 struct cfg80211_connect_params *connect,
1412 struct cfg80211_cached_keys *connkeys,
1413 const u8 *prev_bssid)
1414 {
1415 struct wireless_dev *wdev = dev->ieee80211_ptr;
1416 int err;
1417
1418 ASSERT_WDEV_LOCK(wdev);
1419
1420 /*
1421 * If we have an ssid_len, we're trying to connect or are
1422 * already connected, so reject a new SSID unless it's the
1423 * same (which is the case for re-association.)
1424 */
1425 if (wdev->u.client.ssid_len &&
1426 (wdev->u.client.ssid_len != connect->ssid_len ||
1427 memcmp(wdev->u.client.ssid, connect->ssid, wdev->u.client.ssid_len)))
1428 return -EALREADY;
1429
1430 /*
1431 * If connected, reject (re-)association unless prev_bssid
1432 * matches the current BSSID.
1433 */
1434 if (wdev->connected) {
1435 if (!prev_bssid)
1436 return -EALREADY;
1437 if (!ether_addr_equal(prev_bssid,
1438 wdev->u.client.connected_addr))
1439 return -ENOTCONN;
1440 }
1441
1442 /*
1443 * Reject if we're in the process of connecting with WEP,
1444 * this case isn't very interesting and trying to handle
1445 * it would make the code much more complex.
1446 */
1447 if (wdev->connect_keys)
1448 return -EINPROGRESS;
1449
1450 cfg80211_oper_and_ht_capa(&connect->ht_capa_mask,
1451 rdev->wiphy.ht_capa_mod_mask);
1452 cfg80211_oper_and_vht_capa(&connect->vht_capa_mask,
1453 rdev->wiphy.vht_capa_mod_mask);
1454
1455 if (connkeys && connkeys->def >= 0) {
1456 int idx;
1457 u32 cipher;
1458
1459 idx = connkeys->def;
1460 cipher = connkeys->params[idx].cipher;
1461 /* If given a WEP key we may need it for shared key auth */
1462 if (cipher == WLAN_CIPHER_SUITE_WEP40 ||
1463 cipher == WLAN_CIPHER_SUITE_WEP104) {
1464 connect->key_idx = idx;
1465 connect->key = connkeys->params[idx].key;
1466 connect->key_len = connkeys->params[idx].key_len;
1467
1468 /*
1469 * If ciphers are not set (e.g. when going through
1470 * iwconfig), we have to set them appropriately here.
1471 */
1472 if (connect->crypto.cipher_group == 0)
1473 connect->crypto.cipher_group = cipher;
1474
1475 if (connect->crypto.n_ciphers_pairwise == 0) {
1476 connect->crypto.n_ciphers_pairwise = 1;
1477 connect->crypto.ciphers_pairwise[0] = cipher;
1478 }
1479 }
1480
1481 connect->crypto.wep_keys = connkeys->params;
1482 connect->crypto.wep_tx_key = connkeys->def;
1483 } else {
1484 if (WARN_ON(connkeys))
1485 return -EINVAL;
1486
1487 /* connect can point to wdev->wext.connect which
1488 * can hold key data from a previous connection
1489 */
1490 connect->key = NULL;
1491 connect->key_len = 0;
1492 connect->key_idx = 0;
1493 }
1494
1495 wdev->connect_keys = connkeys;
1496 memcpy(wdev->u.client.ssid, connect->ssid, connect->ssid_len);
1497 wdev->u.client.ssid_len = connect->ssid_len;
1498
1499 wdev->conn_bss_type = connect->pbss ? IEEE80211_BSS_TYPE_PBSS :
1500 IEEE80211_BSS_TYPE_ESS;
1501
1502 if (!rdev->ops->connect)
1503 err = cfg80211_sme_connect(wdev, connect, prev_bssid);
1504 else
1505 err = rdev_connect(rdev, dev, connect);
1506
1507 if (err) {
1508 wdev->connect_keys = NULL;
1509 /*
1510 * This could be reassoc getting refused, don't clear
1511 * ssid_len in that case.
1512 */
1513 if (!wdev->connected)
1514 wdev->u.client.ssid_len = 0;
1515 return err;
1516 }
1517
1518 return 0;
1519 }
1520
cfg80211_disconnect(struct cfg80211_registered_device * rdev,struct net_device * dev,u16 reason,bool wextev)1521 int cfg80211_disconnect(struct cfg80211_registered_device *rdev,
1522 struct net_device *dev, u16 reason, bool wextev)
1523 {
1524 struct wireless_dev *wdev = dev->ieee80211_ptr;
1525 int err = 0;
1526
1527 ASSERT_WDEV_LOCK(wdev);
1528
1529 kfree_sensitive(wdev->connect_keys);
1530 wdev->connect_keys = NULL;
1531
1532 wdev->conn_owner_nlportid = 0;
1533
1534 if (wdev->conn)
1535 err = cfg80211_sme_disconnect(wdev, reason);
1536 else if (!rdev->ops->disconnect)
1537 cfg80211_mlme_down(rdev, dev);
1538 else if (wdev->u.client.ssid_len)
1539 err = rdev_disconnect(rdev, dev, reason);
1540
1541 /*
1542 * Clear ssid_len unless we actually were fully connected,
1543 * in which case cfg80211_disconnected() will take care of
1544 * this later.
1545 */
1546 if (!wdev->connected)
1547 wdev->u.client.ssid_len = 0;
1548
1549 return err;
1550 }
1551
1552 /*
1553 * Used to clean up after the connection / connection attempt owner socket
1554 * disconnects
1555 */
cfg80211_autodisconnect_wk(struct work_struct * work)1556 void cfg80211_autodisconnect_wk(struct work_struct *work)
1557 {
1558 struct wireless_dev *wdev =
1559 container_of(work, struct wireless_dev, disconnect_wk);
1560 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
1561
1562 wdev_lock(wdev);
1563
1564 if (wdev->conn_owner_nlportid) {
1565 switch (wdev->iftype) {
1566 case NL80211_IFTYPE_ADHOC:
1567 __cfg80211_leave_ibss(rdev, wdev->netdev, false);
1568 break;
1569 case NL80211_IFTYPE_AP:
1570 case NL80211_IFTYPE_P2P_GO:
1571 __cfg80211_stop_ap(rdev, wdev->netdev, -1, false);
1572 break;
1573 case NL80211_IFTYPE_MESH_POINT:
1574 __cfg80211_leave_mesh(rdev, wdev->netdev);
1575 break;
1576 case NL80211_IFTYPE_STATION:
1577 case NL80211_IFTYPE_P2P_CLIENT:
1578 /*
1579 * Use disconnect_bssid if still connecting and
1580 * ops->disconnect not implemented. Otherwise we can
1581 * use cfg80211_disconnect.
1582 */
1583 if (rdev->ops->disconnect || wdev->connected)
1584 cfg80211_disconnect(rdev, wdev->netdev,
1585 WLAN_REASON_DEAUTH_LEAVING,
1586 true);
1587 else
1588 cfg80211_mlme_deauth(rdev, wdev->netdev,
1589 wdev->disconnect_bssid,
1590 NULL, 0,
1591 WLAN_REASON_DEAUTH_LEAVING,
1592 false);
1593 break;
1594 default:
1595 break;
1596 }
1597 }
1598
1599 wdev_unlock(wdev);
1600 }
1601